diff options
Diffstat (limited to 'drivers/block')
33 files changed, 2986 insertions, 2809 deletions
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c index 245a879b036e..255591ab3716 100644 --- a/drivers/block/DAC960.c +++ b/drivers/block/DAC960.c @@ -1678,9 +1678,12 @@ static bool DAC960_V1_ReadControllerConfiguration(DAC960_Controller_T Enquiry2->FirmwareID.FirmwareType = '0'; Enquiry2->FirmwareID.TurnID = 0; } - sprintf(Controller->FirmwareVersion, "%d.%02d-%c-%02d", - Enquiry2->FirmwareID.MajorVersion, Enquiry2->FirmwareID.MinorVersion, - Enquiry2->FirmwareID.FirmwareType, Enquiry2->FirmwareID.TurnID); + snprintf(Controller->FirmwareVersion, sizeof(Controller->FirmwareVersion), + "%d.%02d-%c-%02d", + Enquiry2->FirmwareID.MajorVersion, + Enquiry2->FirmwareID.MinorVersion, + Enquiry2->FirmwareID.FirmwareType, + Enquiry2->FirmwareID.TurnID); if (!((Controller->FirmwareVersion[0] == '5' && strcmp(Controller->FirmwareVersion, "5.06") >= 0) || (Controller->FirmwareVersion[0] == '4' && @@ -6588,7 +6591,8 @@ static void DAC960_CreateProcEntries(DAC960_Controller_T *Controller) &dac960_proc_fops); } - sprintf(Controller->ControllerName, "c%d", Controller->ControllerNumber); + snprintf(Controller->ControllerName, sizeof(Controller->ControllerName), + "c%d", Controller->ControllerNumber); ControllerProcEntry = proc_mkdir(Controller->ControllerName, DAC960_ProcDirectoryEntry); proc_create_data("initial_status", 0, ControllerProcEntry, &dac960_initial_status_proc_fops, Controller); diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 898e4861488b..4a438b8abe27 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -17,6 +17,7 @@ if BLK_DEV config BLK_DEV_NULL_BLK tristate "Null test block driver" + depends on CONFIGFS_FS config BLK_DEV_FD tristate "Normal floppy disk support" @@ -443,7 +444,7 @@ config VIRTIO_BLK depends on VIRTIO ---help--- This is the virtual block driver for virtio. It can be used with - lguest or QEMU based VMMs (like KVM or Xen). Say Y or M. + QEMU based VMMs (like KVM or Xen). Say Y or M. config VIRTIO_BLK_SCSI bool "SCSI passthrough request for the Virtio block driver" diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 104b71c0490d..bbd0d186cfc0 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -294,14 +294,13 @@ out: static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio) { - struct block_device *bdev = bio->bi_bdev; - struct brd_device *brd = bdev->bd_disk->private_data; + struct brd_device *brd = bio->bi_disk->private_data; struct bio_vec bvec; sector_t sector; struct bvec_iter iter; sector = bio->bi_iter.bi_sector; - if (bio_end_sector(bio) > get_capacity(bdev->bd_disk)) + if (bio_end_sector(bio) > get_capacity(bio->bi_disk)) goto io_error; bio_for_each_segment(bvec, bio, iter) { @@ -326,7 +325,11 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, struct page *page, bool is_write) { struct brd_device *brd = bdev->bd_disk->private_data; - int err = brd_do_bvec(brd, page, PAGE_SIZE, 0, is_write, sector); + int err; + + if (PageTransHuge(page)) + return -ENOTSUPP; + err = brd_do_bvec(brd, page, PAGE_SIZE, 0, is_write, sector); page_endio(page, is_write, err); return err; } diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index e02c45cd3c5a..5f0eaee8c8a7 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -151,7 +151,7 @@ static int _drbd_md_sync_page_io(struct drbd_device *device, op_flags |= REQ_SYNC; bio = bio_alloc_drbd(GFP_NOIO); - bio->bi_bdev = bdev->md_bdev; + bio_set_dev(bio, bdev->md_bdev); bio->bi_iter.bi_sector = sector; err = -EIO; if (bio_add_page(bio, device->md_io.page, size, 0) != size) diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c index 809fd245c3dc..bd97908c766f 100644 --- a/drivers/block/drbd/drbd_bitmap.c +++ b/drivers/block/drbd/drbd_bitmap.c @@ -1019,7 +1019,7 @@ static void bm_page_io_async(struct drbd_bm_aio_ctx *ctx, int page_nr) __must_ho bm_store_page_idx(page, page_nr); } else page = b->bm_pages[page_nr]; - bio->bi_bdev = device->ldev->md_bdev; + bio_set_dev(bio, device->ldev->md_bdev); bio->bi_iter.bi_sector = on_disk_sector; /* bio_add_page of a single page to an empty bio will always succeed, * according to api. Do we want to assert that? */ diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index d17b6e6393c7..7e8589ce631c 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -63,19 +63,15 @@ # define __must_hold(x) #endif -/* module parameter, defined in drbd_main.c */ -extern unsigned int minor_count; -extern bool disable_sendpage; -extern bool allow_oos; -void tl_abort_disk_io(struct drbd_device *device); - +/* shared module parameters, defined in drbd_main.c */ #ifdef CONFIG_DRBD_FAULT_INJECTION -extern int enable_faults; -extern int fault_rate; -extern int fault_devs; +extern int drbd_enable_faults; +extern int drbd_fault_rate; #endif -extern char usermode_helper[]; +extern unsigned int drbd_minor_count; +extern char drbd_usermode_helper[]; +extern int drbd_proc_details; /* This is used to stop/restart our threads. @@ -181,8 +177,8 @@ _drbd_insert_fault(struct drbd_device *device, unsigned int type); static inline int drbd_insert_fault(struct drbd_device *device, unsigned int type) { #ifdef CONFIG_DRBD_FAULT_INJECTION - return fault_rate && - (enable_faults & (1<<type)) && + return drbd_fault_rate && + (drbd_enable_faults & (1<<type)) && _drbd_insert_fault(device, type); #else return 0; @@ -745,6 +741,8 @@ struct drbd_connection { unsigned current_tle_writes; /* writes seen within this tl epoch */ unsigned long last_reconnect_jif; + /* empty member on older kernels without blk_start_plug() */ + struct blk_plug receiver_plug; struct drbd_thread receiver; struct drbd_thread worker; struct drbd_thread ack_receiver; @@ -1131,7 +1129,8 @@ extern void conn_send_sr_reply(struct drbd_connection *connection, enum drbd_sta extern int drbd_send_rs_deallocated(struct drbd_peer_device *, struct drbd_peer_request *); extern void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev); extern void drbd_device_cleanup(struct drbd_device *device); -void drbd_print_uuids(struct drbd_device *device, const char *text); +extern void drbd_print_uuids(struct drbd_device *device, const char *text); +extern void drbd_queue_unplug(struct drbd_device *device); extern void conn_md_sync(struct drbd_connection *connection); extern void drbd_md_write(struct drbd_device *device, void *buffer); @@ -1463,8 +1462,6 @@ extern struct drbd_resource *drbd_find_resource(const char *name); extern void drbd_destroy_resource(struct kref *kref); extern void conn_free_crypto(struct drbd_connection *connection); -extern int proc_details; - /* drbd_req */ extern void do_submit(struct work_struct *ws); extern void __drbd_make_request(struct drbd_device *, struct bio *, unsigned long); @@ -1628,8 +1625,8 @@ static inline void drbd_generic_make_request(struct drbd_device *device, int fault_type, struct bio *bio) { __release(local); - if (!bio->bi_bdev) { - drbd_err(device, "drbd_generic_make_request: bio->bi_bdev == NULL\n"); + if (!bio->bi_disk) { + drbd_err(device, "drbd_generic_make_request: bio->bi_disk == NULL\n"); bio->bi_status = BLK_STS_IOERR; bio_endio(bio); return; diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index e2ed28d45ce1..8cb3791898ae 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -77,41 +77,41 @@ MODULE_PARM_DESC(minor_count, "Approximate number of drbd devices (" MODULE_ALIAS_BLOCKDEV_MAJOR(DRBD_MAJOR); #include <linux/moduleparam.h> -/* allow_open_on_secondary */ -MODULE_PARM_DESC(allow_oos, "DONT USE!"); /* thanks to these macros, if compiled into the kernel (not-module), - * this becomes the boot parameter drbd.minor_count */ -module_param(minor_count, uint, 0444); -module_param(disable_sendpage, bool, 0644); -module_param(allow_oos, bool, 0); -module_param(proc_details, int, 0644); + * these become boot parameters (e.g., drbd.minor_count) */ #ifdef CONFIG_DRBD_FAULT_INJECTION -int enable_faults; -int fault_rate; -static int fault_count; -int fault_devs; +int drbd_enable_faults; +int drbd_fault_rate; +static int drbd_fault_count; +static int drbd_fault_devs; /* bitmap of enabled faults */ -module_param(enable_faults, int, 0664); +module_param_named(enable_faults, drbd_enable_faults, int, 0664); /* fault rate % value - applies to all enabled faults */ -module_param(fault_rate, int, 0664); +module_param_named(fault_rate, drbd_fault_rate, int, 0664); /* count of faults inserted */ -module_param(fault_count, int, 0664); +module_param_named(fault_count, drbd_fault_count, int, 0664); /* bitmap of devices to insert faults on */ -module_param(fault_devs, int, 0644); +module_param_named(fault_devs, drbd_fault_devs, int, 0644); #endif -/* module parameter, defined */ -unsigned int minor_count = DRBD_MINOR_COUNT_DEF; -bool disable_sendpage; -bool allow_oos; -int proc_details; /* Detail level in proc drbd*/ - +/* module parameters we can keep static */ +static bool drbd_allow_oos; /* allow_open_on_secondary */ +static bool drbd_disable_sendpage; +MODULE_PARM_DESC(allow_oos, "DONT USE!"); +module_param_named(allow_oos, drbd_allow_oos, bool, 0); +module_param_named(disable_sendpage, drbd_disable_sendpage, bool, 0644); + +/* module parameters we share */ +int drbd_proc_details; /* Detail level in proc drbd*/ +module_param_named(proc_details, drbd_proc_details, int, 0644); +/* module parameters shared with defaults */ +unsigned int drbd_minor_count = DRBD_MINOR_COUNT_DEF; /* Module parameter for setting the user mode helper program * to run. Default is /sbin/drbdadm */ -char usermode_helper[80] = "/sbin/drbdadm"; - -module_param_string(usermode_helper, usermode_helper, sizeof(usermode_helper), 0644); +char drbd_usermode_helper[80] = "/sbin/drbdadm"; +module_param_named(minor_count, drbd_minor_count, uint, 0444); +module_param_string(usermode_helper, drbd_usermode_helper, sizeof(drbd_usermode_helper), 0644); /* in 2.6.x, our device mapping and config info contains our virtual gendisks * as member "struct gendisk *vdisk;" @@ -923,7 +923,9 @@ void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *peer_device) } /* communicated if (agreed_features & DRBD_FF_WSAME) */ -void assign_p_sizes_qlim(struct drbd_device *device, struct p_sizes *p, struct request_queue *q) +static void +assign_p_sizes_qlim(struct drbd_device *device, struct p_sizes *p, + struct request_queue *q) { if (q) { p->qlim->physical_block_size = cpu_to_be32(queue_physical_block_size(q)); @@ -1560,7 +1562,7 @@ static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *pa * put_page(); and would cause either a VM_BUG directly, or * __page_cache_release a page that would actually still be referenced * by someone, leading to some obscure delayed Oops somewhere else. */ - if (disable_sendpage || (page_count(page) < 1) || PageSlab(page)) + if (drbd_disable_sendpage || (page_count(page) < 1) || PageSlab(page)) return _drbd_no_send_page(peer_device, page, offset, size, msg_flags); msg_flags |= MSG_NOSIGNAL; @@ -1932,7 +1934,7 @@ static int drbd_open(struct block_device *bdev, fmode_t mode) if (device->state.role != R_PRIMARY) { if (mode & FMODE_WRITE) rv = -EROFS; - else if (!allow_oos) + else if (!drbd_allow_oos) rv = -EMEDIUMTYPE; } @@ -1952,6 +1954,19 @@ static void drbd_release(struct gendisk *gd, fmode_t mode) mutex_unlock(&drbd_main_mutex); } +/* need to hold resource->req_lock */ +void drbd_queue_unplug(struct drbd_device *device) +{ + if (device->state.pdsk >= D_INCONSISTENT && device->state.conn >= C_CONNECTED) { + D_ASSERT(device, device->state.role == R_PRIMARY); + if (test_and_clear_bit(UNPLUG_REMOTE, &device->flags)) { + drbd_queue_work_if_unqueued( + &first_peer_device(device)->connection->sender_work, + &device->unplug_work); + } + } +} + static void drbd_set_defaults(struct drbd_device *device) { /* Beware! The actual layout differs @@ -2008,18 +2023,14 @@ void drbd_init_set_defaults(struct drbd_device *device) device->unplug_work.cb = w_send_write_hint; device->bm_io_work.w.cb = w_bitmap_io; - init_timer(&device->resync_timer); - init_timer(&device->md_sync_timer); - init_timer(&device->start_resync_timer); - init_timer(&device->request_timer); - device->resync_timer.function = resync_timer_fn; - device->resync_timer.data = (unsigned long) device; - device->md_sync_timer.function = md_sync_timer_fn; - device->md_sync_timer.data = (unsigned long) device; - device->start_resync_timer.function = start_resync_timer_fn; - device->start_resync_timer.data = (unsigned long) device; - device->request_timer.function = request_timer_fn; - device->request_timer.data = (unsigned long) device; + setup_timer(&device->resync_timer, resync_timer_fn, + (unsigned long)device); + setup_timer(&device->md_sync_timer, md_sync_timer_fn, + (unsigned long)device); + setup_timer(&device->start_resync_timer, start_resync_timer_fn, + (unsigned long)device); + setup_timer(&device->request_timer, request_timer_fn, + (unsigned long)device); init_waitqueue_head(&device->misc_wait); init_waitqueue_head(&device->state_wait); @@ -2131,7 +2142,7 @@ static void drbd_destroy_mempools(void) static int drbd_create_mempools(void) { struct page *page; - const int number = (DRBD_MAX_BIO_SIZE/PAGE_SIZE) * minor_count; + const int number = (DRBD_MAX_BIO_SIZE/PAGE_SIZE) * drbd_minor_count; int i; /* prepare our caches and mempools */ @@ -2167,13 +2178,12 @@ static int drbd_create_mempools(void) goto Enomem; /* mempools */ - drbd_io_bio_set = bioset_create(BIO_POOL_SIZE, 0, BIOSET_NEED_RESCUER); + drbd_io_bio_set = bioset_create(BIO_POOL_SIZE, 0, 0); if (drbd_io_bio_set == NULL) goto Enomem; drbd_md_io_bio_set = bioset_create(DRBD_MIN_POOL_PAGES, 0, - BIOSET_NEED_BVECS | - BIOSET_NEED_RESCUER); + BIOSET_NEED_BVECS); if (drbd_md_io_bio_set == NULL) goto Enomem; @@ -2409,7 +2419,6 @@ static void drbd_cleanup(void) destroy_workqueue(retry.wq); drbd_genl_unregister(); - drbd_debugfs_cleanup(); idr_for_each_entry(&drbd_devices, device, i) drbd_delete_device(device); @@ -2420,6 +2429,8 @@ static void drbd_cleanup(void) drbd_free_resource(resource); } + drbd_debugfs_cleanup(); + drbd_destroy_mempools(); unregister_blkdev(DRBD_MAJOR, "drbd"); @@ -2972,12 +2983,12 @@ static int __init drbd_init(void) { int err; - if (minor_count < DRBD_MINOR_COUNT_MIN || minor_count > DRBD_MINOR_COUNT_MAX) { - pr_err("invalid minor_count (%d)\n", minor_count); + if (drbd_minor_count < DRBD_MINOR_COUNT_MIN || drbd_minor_count > DRBD_MINOR_COUNT_MAX) { + pr_err("invalid minor_count (%d)\n", drbd_minor_count); #ifdef MODULE return -EINVAL; #else - minor_count = DRBD_MINOR_COUNT_DEF; + drbd_minor_count = DRBD_MINOR_COUNT_DEF; #endif } @@ -3900,12 +3911,12 @@ _drbd_insert_fault(struct drbd_device *device, unsigned int type) static struct fault_random_state rrs = {0, 0}; unsigned int ret = ( - (fault_devs == 0 || - ((1 << device_to_minor(device)) & fault_devs) != 0) && - (((_drbd_fault_random(&rrs) % 100) + 1) <= fault_rate)); + (drbd_fault_devs == 0 || + ((1 << device_to_minor(device)) & drbd_fault_devs) != 0) && + (((_drbd_fault_random(&rrs) % 100) + 1) <= drbd_fault_rate)); if (ret) { - fault_count++; + drbd_fault_count++; if (__ratelimit(&drbd_ratelimit_state)) drbd_warn(device, "***Simulating %s failure\n", diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index ad0fcb43e45c..a12f77e6891e 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -344,7 +344,7 @@ int drbd_khelper(struct drbd_device *device, char *cmd) (char[60]) { }, /* address */ NULL }; char mb[14]; - char *argv[] = {usermode_helper, cmd, mb, NULL }; + char *argv[] = {drbd_usermode_helper, cmd, mb, NULL }; struct drbd_connection *connection = first_peer_device(device)->connection; struct sib_info sib; int ret; @@ -359,19 +359,19 @@ int drbd_khelper(struct drbd_device *device, char *cmd) * write out any unsynced meta data changes now */ drbd_md_sync(device); - drbd_info(device, "helper command: %s %s %s\n", usermode_helper, cmd, mb); + drbd_info(device, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, mb); sib.sib_reason = SIB_HELPER_PRE; sib.helper_name = cmd; drbd_bcast_event(device, &sib); notify_helper(NOTIFY_CALL, device, connection, cmd, 0); - ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); + ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC); if (ret) drbd_warn(device, "helper command: %s %s %s exit code %u (0x%x)\n", - usermode_helper, cmd, mb, + drbd_usermode_helper, cmd, mb, (ret >> 8) & 0xff, ret); else drbd_info(device, "helper command: %s %s %s exit code %u (0x%x)\n", - usermode_helper, cmd, mb, + drbd_usermode_helper, cmd, mb, (ret >> 8) & 0xff, ret); sib.sib_reason = SIB_HELPER_POST; sib.helper_exit_code = ret; @@ -396,24 +396,24 @@ enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd) (char[60]) { }, /* address */ NULL }; char *resource_name = connection->resource->name; - char *argv[] = {usermode_helper, cmd, resource_name, NULL }; + char *argv[] = {drbd_usermode_helper, cmd, resource_name, NULL }; int ret; setup_khelper_env(connection, envp); conn_md_sync(connection); - drbd_info(connection, "helper command: %s %s %s\n", usermode_helper, cmd, resource_name); + drbd_info(connection, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, resource_name); /* TODO: conn_bcast_event() ?? */ notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0); - ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); + ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC); if (ret) drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n", - usermode_helper, cmd, resource_name, + drbd_usermode_helper, cmd, resource_name, (ret >> 8) & 0xff, ret); else drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n", - usermode_helper, cmd, resource_name, + drbd_usermode_helper, cmd, resource_name, (ret >> 8) & 0xff, ret); /* TODO: conn_bcast_event() ?? */ notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret); @@ -1236,12 +1236,18 @@ static void fixup_discard_if_not_supported(struct request_queue *q) static void decide_on_write_same_support(struct drbd_device *device, struct request_queue *q, - struct request_queue *b, struct o_qlim *o) + struct request_queue *b, struct o_qlim *o, + bool disable_write_same) { struct drbd_peer_device *peer_device = first_peer_device(device); struct drbd_connection *connection = peer_device->connection; bool can_do = b ? b->limits.max_write_same_sectors : true; + if (can_do && disable_write_same) { + can_do = false; + drbd_info(peer_device, "WRITE_SAME disabled by config\n"); + } + if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_WSAME)) { can_do = false; drbd_info(peer_device, "peer does not support WRITE_SAME\n"); @@ -1302,6 +1308,7 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi struct request_queue *b = NULL; struct disk_conf *dc; bool discard_zeroes_if_aligned = true; + bool disable_write_same = false; if (bdev) { b = bdev->backing_bdev->bd_disk->queue; @@ -1311,6 +1318,7 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi dc = rcu_dereference(device->ldev->disk_conf); max_segments = dc->max_bio_bvecs; discard_zeroes_if_aligned = dc->discard_zeroes_if_aligned; + disable_write_same = dc->disable_write_same; rcu_read_unlock(); blk_set_stacking_limits(&q->limits); @@ -1321,7 +1329,7 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); blk_queue_segment_boundary(q, PAGE_SIZE-1); decide_on_discard_support(device, q, b, discard_zeroes_if_aligned); - decide_on_write_same_support(device, q, b, o); + decide_on_write_same_support(device, q, b, o, disable_write_same); if (b) { blk_queue_stack_limits(q, b); @@ -1612,7 +1620,8 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) if (write_ordering_changed(old_disk_conf, new_disk_conf)) drbd_bump_write_ordering(device->resource, NULL, WO_BDEV_FLUSH); - if (old_disk_conf->discard_zeroes_if_aligned != new_disk_conf->discard_zeroes_if_aligned) + if (old_disk_conf->discard_zeroes_if_aligned != new_disk_conf->discard_zeroes_if_aligned + || old_disk_conf->disable_write_same != new_disk_conf->disable_write_same) drbd_reconsider_queue_parameters(device, device->ldev, NULL); drbd_md_sync(device); @@ -2140,34 +2149,13 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) static int adm_detach(struct drbd_device *device, int force) { - enum drbd_state_rv retcode; - void *buffer; - int ret; - if (force) { set_bit(FORCE_DETACH, &device->flags); drbd_force_state(device, NS(disk, D_FAILED)); - retcode = SS_SUCCESS; - goto out; + return SS_SUCCESS; } - drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */ - buffer = drbd_md_get_buffer(device, __func__); /* make sure there is no in-flight meta-data IO */ - if (buffer) { - retcode = drbd_request_state(device, NS(disk, D_FAILED)); - drbd_md_put_buffer(device); - } else /* already <= D_FAILED */ - retcode = SS_NOTHING_TO_DO; - /* D_FAILED will transition to DISKLESS. */ - drbd_resume_io(device); - ret = wait_event_interruptible(device->misc_wait, - device->state.disk != D_FAILED); - if ((int)retcode == (int)SS_IS_DISKLESS) - retcode = SS_NOTHING_TO_DO; - if (ret) - retcode = ERR_INTR; -out: - return retcode; + return drbd_request_detach_interruptible(device); } /* Detaching the disk is a process in multiple stages. First we need to lock diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c index 8378142f7a55..582caeb0de86 100644 --- a/drivers/block/drbd/drbd_proc.c +++ b/drivers/block/drbd/drbd_proc.c @@ -127,7 +127,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se seq_putc(seq, '='); seq_putc(seq, '>'); for (i = 0; i < y; i++) - seq_printf(seq, "."); + seq_putc(seq, '.'); seq_puts(seq, "] "); if (state.conn == C_VERIFY_S || state.conn == C_VERIFY_T) @@ -179,7 +179,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se seq_printf_with_thousands_grouping(seq, dbdt); seq_puts(seq, " ("); /* ------------------------- ~3s average ------------------------ */ - if (proc_details >= 1) { + if (drbd_proc_details >= 1) { /* this is what drbd_rs_should_slow_down() uses */ i = (device->rs_last_mark + DRBD_SYNC_MARKS-1) % DRBD_SYNC_MARKS; dt = (jiffies - device->rs_mark_time[i]) / HZ; @@ -209,7 +209,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se } seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : ""); - if (proc_details >= 1) { + if (drbd_proc_details >= 1) { /* 64 bit: * we convert to sectors in the display below. */ unsigned long bm_bits = drbd_bm_bits(device); @@ -332,13 +332,13 @@ static int drbd_seq_show(struct seq_file *seq, void *v) state.conn == C_VERIFY_T) drbd_syncer_progress(device, seq, state); - if (proc_details >= 1 && get_ldev_if_state(device, D_FAILED)) { + if (drbd_proc_details >= 1 && get_ldev_if_state(device, D_FAILED)) { lc_seq_printf_stats(seq, device->resync); lc_seq_printf_stats(seq, device->act_log); put_ldev(device); } - if (proc_details >= 2) + if (drbd_proc_details >= 2) seq_printf(seq, "\tblocked on activity log: %d\n", atomic_read(&device->ap_actlog_cnt)); } rcu_read_unlock(); diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index c7e95e6380fb..796eaf347dc0 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -332,7 +332,7 @@ static void drbd_free_pages(struct drbd_device *device, struct page *page, int i if (page == NULL) return; - if (drbd_pp_vacant > (DRBD_MAX_BIO_SIZE/PAGE_SIZE) * minor_count) + if (drbd_pp_vacant > (DRBD_MAX_BIO_SIZE/PAGE_SIZE) * drbd_minor_count) i = page_chain_free(page); else { struct page *tmp; @@ -1100,7 +1100,10 @@ randomize: idr_for_each_entry(&connection->peer_devices, peer_device, vnr) mutex_lock(peer_device->device->state_mutex); + /* avoid a race with conn_request_state( C_DISCONNECTING ) */ + spin_lock_irq(&connection->resource->req_lock); set_bit(STATE_SENT, &connection->flags); + spin_unlock_irq(&connection->resource->req_lock); idr_for_each_entry(&connection->peer_devices, peer_device, vnr) mutex_unlock(peer_device->device->state_mutex); @@ -1194,6 +1197,14 @@ static int decode_header(struct drbd_connection *connection, void *header, struc return 0; } +static void drbd_unplug_all_devices(struct drbd_connection *connection) +{ + if (current->plug == &connection->receiver_plug) { + blk_finish_plug(&connection->receiver_plug); + blk_start_plug(&connection->receiver_plug); + } /* else: maybe just schedule() ?? */ +} + static int drbd_recv_header(struct drbd_connection *connection, struct packet_info *pi) { void *buffer = connection->data.rbuf; @@ -1209,6 +1220,36 @@ static int drbd_recv_header(struct drbd_connection *connection, struct packet_in return err; } +static int drbd_recv_header_maybe_unplug(struct drbd_connection *connection, struct packet_info *pi) +{ + void *buffer = connection->data.rbuf; + unsigned int size = drbd_header_size(connection); + int err; + + err = drbd_recv_short(connection->data.socket, buffer, size, MSG_NOSIGNAL|MSG_DONTWAIT); + if (err != size) { + /* If we have nothing in the receive buffer now, to reduce + * application latency, try to drain the backend queues as + * quickly as possible, and let remote TCP know what we have + * received so far. */ + if (err == -EAGAIN) { + drbd_tcp_quickack(connection->data.socket); + drbd_unplug_all_devices(connection); + } + if (err > 0) { + buffer += err; + size -= err; + } + err = drbd_recv_all_warn(connection, buffer, size); + if (err) + return err; + } + + err = decode_header(connection, connection->data.rbuf, pi); + connection->last_received = jiffies; + + return err; +} /* This is blkdev_issue_flush, but asynchronous. * We want to submit to all component volumes in parallel, * then wait for all completions. @@ -1223,7 +1264,7 @@ struct one_flush_context { struct issue_flush_context *ctx; }; -void one_flush_endio(struct bio *bio) +static void one_flush_endio(struct bio *bio) { struct one_flush_context *octx = bio->bi_private; struct drbd_device *device = octx->device; @@ -1265,7 +1306,7 @@ static void submit_one_flush(struct drbd_device *device, struct issue_flush_cont octx->device = device; octx->ctx = ctx; - bio->bi_bdev = device->ldev->backing_bdev; + bio_set_dev(bio, device->ldev->backing_bdev); bio->bi_private = octx; bio->bi_end_io = one_flush_endio; bio->bi_opf = REQ_OP_FLUSH | REQ_PREFLUSH; @@ -1548,7 +1589,7 @@ next_bio: } /* > peer_req->i.sector, unless this is the first bio */ bio->bi_iter.bi_sector = sector; - bio->bi_bdev = device->ldev->backing_bdev; + bio_set_dev(bio, device->ldev->backing_bdev); bio_set_op_attrs(bio, op, op_flags); bio->bi_private = peer_req; bio->bi_end_io = drbd_peer_request_endio; @@ -4085,7 +4126,7 @@ static int receive_uuids(struct drbd_connection *connection, struct packet_info return config_unknown_volume(connection, pi); device = peer_device->device; - p_uuid = kmalloc(sizeof(u64)*UI_EXTENDED_SIZE, GFP_NOIO); + p_uuid = kmalloc_array(UI_EXTENDED_SIZE, sizeof(*p_uuid), GFP_NOIO); if (!p_uuid) { drbd_err(device, "kmalloc of p_uuid failed\n"); return false; @@ -4882,8 +4923,8 @@ static void drbdd(struct drbd_connection *connection) struct data_cmd const *cmd; drbd_thread_current_set_cpu(&connection->receiver); - update_receiver_timing_details(connection, drbd_recv_header); - if (drbd_recv_header(connection, &pi)) + update_receiver_timing_details(connection, drbd_recv_header_maybe_unplug); + if (drbd_recv_header_maybe_unplug(connection, &pi)) goto err_out; cmd = &drbd_cmd_handler[pi.cmd]; @@ -5375,8 +5416,11 @@ int drbd_receiver(struct drbd_thread *thi) } } while (h == 0); - if (h > 0) + if (h > 0) { + blk_start_plug(&connection->receiver_plug); drbdd(connection); + blk_finish_plug(&connection->receiver_plug); + } conn_disconnect(connection); diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c index f6e865b2d543..de8566e55334 100644 --- a/drivers/block/drbd/drbd_req.c +++ b/drivers/block/drbd/drbd_req.c @@ -36,14 +36,18 @@ static bool drbd_may_do_local_read(struct drbd_device *device, sector_t sector, /* Update disk stats at start of I/O request */ static void _drbd_start_io_acct(struct drbd_device *device, struct drbd_request *req) { - generic_start_io_acct(bio_data_dir(req->master_bio), req->i.size >> 9, - &device->vdisk->part0); + struct request_queue *q = device->rq_queue; + + generic_start_io_acct(q, bio_data_dir(req->master_bio), + req->i.size >> 9, &device->vdisk->part0); } /* Update disk stats when completing request upwards */ static void _drbd_end_io_acct(struct drbd_device *device, struct drbd_request *req) { - generic_end_io_acct(bio_data_dir(req->master_bio), + struct request_queue *q = device->rq_queue; + + generic_end_io_acct(q, bio_data_dir(req->master_bio), &device->vdisk->part0, req->start_jif); } @@ -1175,7 +1179,7 @@ drbd_submit_req_private_bio(struct drbd_request *req) else type = DRBD_FAULT_DT_RD; - bio->bi_bdev = device->ldev->backing_bdev; + bio_set_dev(bio, device->ldev->backing_bdev); /* State may have changed since we grabbed our reference on the * ->ldev member. Double check, and short-circuit to endio. @@ -1275,6 +1279,57 @@ static bool may_do_writes(struct drbd_device *device) return s.disk == D_UP_TO_DATE || s.pdsk == D_UP_TO_DATE; } +struct drbd_plug_cb { + struct blk_plug_cb cb; + struct drbd_request *most_recent_req; + /* do we need more? */ +}; + +static void drbd_unplug(struct blk_plug_cb *cb, bool from_schedule) +{ + struct drbd_plug_cb *plug = container_of(cb, struct drbd_plug_cb, cb); + struct drbd_resource *resource = plug->cb.data; + struct drbd_request *req = plug->most_recent_req; + + kfree(cb); + if (!req) + return; + + spin_lock_irq(&resource->req_lock); + /* In case the sender did not process it yet, raise the flag to + * have it followed with P_UNPLUG_REMOTE just after. */ + req->rq_state |= RQ_UNPLUG; + /* but also queue a generic unplug */ + drbd_queue_unplug(req->device); + kref_put(&req->kref, drbd_req_destroy); + spin_unlock_irq(&resource->req_lock); +} + +static struct drbd_plug_cb* drbd_check_plugged(struct drbd_resource *resource) +{ + /* A lot of text to say + * return (struct drbd_plug_cb*)blk_check_plugged(); */ + struct drbd_plug_cb *plug; + struct blk_plug_cb *cb = blk_check_plugged(drbd_unplug, resource, sizeof(*plug)); + + if (cb) + plug = container_of(cb, struct drbd_plug_cb, cb); + else + plug = NULL; + return plug; +} + +static void drbd_update_plug(struct drbd_plug_cb *plug, struct drbd_request *req) +{ + struct drbd_request *tmp = plug->most_recent_req; + /* Will be sent to some peer. + * Remember to tag it with UNPLUG_REMOTE on unplug */ + kref_get(&req->kref); + plug->most_recent_req = req; + if (tmp) + kref_put(&tmp->kref, drbd_req_destroy); +} + static void drbd_send_and_submit(struct drbd_device *device, struct drbd_request *req) { struct drbd_resource *resource = device->resource; @@ -1347,6 +1402,12 @@ static void drbd_send_and_submit(struct drbd_device *device, struct drbd_request no_remote = true; } + if (no_remote == false) { + struct drbd_plug_cb *plug = drbd_check_plugged(resource); + if (plug) + drbd_update_plug(plug, req); + } + /* If it took the fast path in drbd_request_prepare, add it here. * The slow path has added it already. */ if (list_empty(&req->req_pending_master_completion)) @@ -1395,7 +1456,10 @@ void __drbd_make_request(struct drbd_device *device, struct bio *bio, unsigned l static void submit_fast_path(struct drbd_device *device, struct list_head *incoming) { + struct blk_plug plug; struct drbd_request *req, *tmp; + + blk_start_plug(&plug); list_for_each_entry_safe(req, tmp, incoming, tl_requests) { const int rw = bio_data_dir(req->master_bio); @@ -1413,6 +1477,7 @@ static void submit_fast_path(struct drbd_device *device, struct list_head *incom list_del_init(&req->tl_requests); drbd_send_and_submit(device, req); } + blk_finish_plug(&plug); } static bool prepare_al_transaction_nonblock(struct drbd_device *device, @@ -1420,12 +1485,12 @@ static bool prepare_al_transaction_nonblock(struct drbd_device *device, struct list_head *pending, struct list_head *later) { - struct drbd_request *req, *tmp; + struct drbd_request *req; int wake = 0; int err; spin_lock_irq(&device->al_lock); - list_for_each_entry_safe(req, tmp, incoming, tl_requests) { + while ((req = list_first_entry_or_null(incoming, struct drbd_request, tl_requests))) { err = drbd_al_begin_io_nonblock(device, &req->i); if (err == -ENOBUFS) break; @@ -1442,17 +1507,20 @@ static bool prepare_al_transaction_nonblock(struct drbd_device *device, return !list_empty(pending); } -void send_and_submit_pending(struct drbd_device *device, struct list_head *pending) +static void send_and_submit_pending(struct drbd_device *device, struct list_head *pending) { - struct drbd_request *req, *tmp; + struct blk_plug plug; + struct drbd_request *req; - list_for_each_entry_safe(req, tmp, pending, tl_requests) { + blk_start_plug(&plug); + while ((req = list_first_entry_or_null(pending, struct drbd_request, tl_requests))) { req->rq_state |= RQ_IN_ACT_LOG; req->in_actlog_jif = jiffies; atomic_dec(&device->ap_actlog_cnt); list_del_init(&req->tl_requests); drbd_send_and_submit(device, req); } + blk_finish_plug(&plug); } void do_submit(struct work_struct *ws) diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h index 9e1866ab238f..a2254f825601 100644 --- a/drivers/block/drbd/drbd_req.h +++ b/drivers/block/drbd/drbd_req.h @@ -212,6 +212,11 @@ enum drbd_req_state_bits { /* Should call drbd_al_complete_io() for this request... */ __RQ_IN_ACT_LOG, + /* This was the most recent request during some blk_finish_plug() + * or its implicit from-schedule equivalent. + * We may use it as hint to send a P_UNPLUG_REMOTE */ + __RQ_UNPLUG, + /* The peer has sent a retry ACK */ __RQ_POSTPONED, @@ -249,6 +254,7 @@ enum drbd_req_state_bits { #define RQ_WSAME (1UL << __RQ_WSAME) #define RQ_UNMAP (1UL << __RQ_UNMAP) #define RQ_IN_ACT_LOG (1UL << __RQ_IN_ACT_LOG) +#define RQ_UNPLUG (1UL << __RQ_UNPLUG) #define RQ_POSTPONED (1UL << __RQ_POSTPONED) #define RQ_COMPLETION_SUSP (1UL << __RQ_COMPLETION_SUSP) #define RQ_EXP_RECEIVE_ACK (1UL << __RQ_EXP_RECEIVE_ACK) diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index eea0c4aec978..0813c654c893 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c @@ -346,7 +346,7 @@ static enum drbd_role min_role(enum drbd_role role1, enum drbd_role role2) enum drbd_role conn_highest_role(struct drbd_connection *connection) { - enum drbd_role role = R_UNKNOWN; + enum drbd_role role = R_SECONDARY; struct drbd_peer_device *peer_device; int vnr; @@ -579,11 +579,14 @@ drbd_req_state(struct drbd_device *device, union drbd_state mask, unsigned long flags; union drbd_state os, ns; enum drbd_state_rv rv; + void *buffer = NULL; init_completion(&done); if (f & CS_SERIALIZE) mutex_lock(device->state_mutex); + if (f & CS_INHIBIT_MD_IO) + buffer = drbd_md_get_buffer(device, __func__); spin_lock_irqsave(&device->resource->req_lock, flags); os = drbd_read_state(device); @@ -636,6 +639,8 @@ drbd_req_state(struct drbd_device *device, union drbd_state mask, } abort: + if (buffer) + drbd_md_put_buffer(device); if (f & CS_SERIALIZE) mutex_unlock(device->state_mutex); @@ -664,6 +669,47 @@ _drbd_request_state(struct drbd_device *device, union drbd_state mask, return rv; } +/* + * We grab drbd_md_get_buffer(), because we don't want to "fail" the disk while + * there is IO in-flight: the transition into D_FAILED for detach purposes + * may get misinterpreted as actual IO error in a confused endio function. + * + * We wrap it all into wait_event(), to retry in case the drbd_req_state() + * returns SS_IN_TRANSIENT_STATE. + * + * To avoid potential deadlock with e.g. the receiver thread trying to grab + * drbd_md_get_buffer() while trying to get out of the "transient state", we + * need to grab and release the meta data buffer inside of that wait_event loop. + */ +static enum drbd_state_rv +request_detach(struct drbd_device *device) +{ + return drbd_req_state(device, NS(disk, D_FAILED), + CS_VERBOSE | CS_ORDERED | CS_INHIBIT_MD_IO); +} + +enum drbd_state_rv +drbd_request_detach_interruptible(struct drbd_device *device) +{ + enum drbd_state_rv rv; + int ret; + + drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */ + wait_event_interruptible(device->state_wait, + (rv = request_detach(device)) != SS_IN_TRANSIENT_STATE); + drbd_resume_io(device); + + ret = wait_event_interruptible(device->misc_wait, + device->state.disk != D_FAILED); + + if (rv == SS_IS_DISKLESS) + rv = SS_NOTHING_TO_DO; + if (ret) + rv = ERR_INTR; + + return rv; +} + enum drbd_state_rv _drbd_request_state_holding_state_mutex(struct drbd_device *device, union drbd_state mask, union drbd_state val, enum chg_state_flags f) diff --git a/drivers/block/drbd/drbd_state.h b/drivers/block/drbd/drbd_state.h index 6c9d5d4a8a75..0276c98fbbdd 100644 --- a/drivers/block/drbd/drbd_state.h +++ b/drivers/block/drbd/drbd_state.h @@ -71,6 +71,10 @@ enum chg_state_flags { CS_DC_SUSP = 1 << 10, CS_DC_MASK = CS_DC_ROLE + CS_DC_PEER + CS_DC_CONN + CS_DC_DISK + CS_DC_PDSK, CS_IGN_OUTD_FAIL = 1 << 11, + + /* Make sure no meta data IO is in flight, by calling + * drbd_md_get_buffer(). Used for graceful detach. */ + CS_INHIBIT_MD_IO = 1 << 12, }; /* drbd_dev_state and drbd_state are different types. This is to stress the @@ -156,6 +160,10 @@ static inline int drbd_request_state(struct drbd_device *device, return _drbd_request_state(device, mask, val, CS_VERBOSE + CS_ORDERED); } +/* for use in adm_detach() (drbd_adm_detach(), drbd_adm_down()) */ +enum drbd_state_rv +drbd_request_detach_interruptible(struct drbd_device *device); + enum drbd_role conn_highest_role(struct drbd_connection *connection); enum drbd_role conn_highest_peer(struct drbd_connection *connection); enum drbd_disk_state conn_highest_disk(struct drbd_connection *connection); diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index 1d8726a8df34..03471b3fce86 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -65,6 +65,11 @@ void drbd_md_endio(struct bio *bio) device = bio->bi_private; device->md_io.error = blk_status_to_errno(bio->bi_status); + /* special case: drbd_md_read() during drbd_adm_attach() */ + if (device->ldev) + put_ldev(device); + bio_put(bio); + /* We grabbed an extra reference in _drbd_md_sync_page_io() to be able * to timeout on the lower level device, and eventually detach from it. * If this io completion runs after that timeout expired, this @@ -79,9 +84,6 @@ void drbd_md_endio(struct bio *bio) drbd_md_put_buffer(device); device->md_io.done = 1; wake_up(&device->misc_wait); - bio_put(bio); - if (device->ldev) /* special case: drbd_md_read() during drbd_adm_attach() */ - put_ldev(device); } /* reads on behalf of the partner, @@ -128,6 +130,14 @@ void drbd_endio_write_sec_final(struct drbd_peer_request *peer_req) __releases(l block_id = peer_req->block_id; peer_req->flags &= ~EE_CALL_AL_COMPLETE_IO; + if (peer_req->flags & EE_WAS_ERROR) { + /* In protocol != C, we usually do not send write acks. + * In case of a write error, send the neg ack anyways. */ + if (!__test_and_set_bit(__EE_SEND_WRITE_ACK, &peer_req->flags)) + inc_unacked(device); + drbd_set_out_of_sync(device, peer_req->i.sector, peer_req->i.size); + } + spin_lock_irqsave(&device->resource->req_lock, flags); device->writ_cnt += peer_req->i.size >> 9; list_move_tail(&peer_req->w.list, &device->done_ee); @@ -195,7 +205,8 @@ void drbd_peer_request_endio(struct bio *bio) } } -void drbd_panic_after_delayed_completion_of_aborted_request(struct drbd_device *device) +static void +drbd_panic_after_delayed_completion_of_aborted_request(struct drbd_device *device) { panic("drbd%u %s/%u potential random memory corruption caused by delayed completion of aborted local request\n", device->minor, device->resource->name, device->vnr); @@ -1382,18 +1393,22 @@ static int drbd_send_barrier(struct drbd_connection *connection) return conn_send_command(connection, sock, P_BARRIER, sizeof(*p), NULL, 0); } +static int pd_send_unplug_remote(struct drbd_peer_device *pd) +{ + struct drbd_socket *sock = &pd->connection->data; + if (!drbd_prepare_command(pd, sock)) + return -EIO; + return drbd_send_command(pd, sock, P_UNPLUG_REMOTE, 0, NULL, 0); +} + int w_send_write_hint(struct drbd_work *w, int cancel) { struct drbd_device *device = container_of(w, struct drbd_device, unplug_work); - struct drbd_socket *sock; if (cancel) return 0; - sock = &first_peer_device(device)->connection->data; - if (!drbd_prepare_command(first_peer_device(device), sock)) - return -EIO; - return drbd_send_command(first_peer_device(device), sock, P_UNPLUG_REMOTE, 0, NULL, 0); + return pd_send_unplug_remote(first_peer_device(device)); } static void re_init_if_first_write(struct drbd_connection *connection, unsigned int epoch) @@ -1455,6 +1470,7 @@ int w_send_dblock(struct drbd_work *w, int cancel) struct drbd_device *device = req->device; struct drbd_peer_device *const peer_device = first_peer_device(device); struct drbd_connection *connection = peer_device->connection; + bool do_send_unplug = req->rq_state & RQ_UNPLUG; int err; if (unlikely(cancel)) { @@ -1470,6 +1486,9 @@ int w_send_dblock(struct drbd_work *w, int cancel) err = drbd_send_dblock(peer_device, req); req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK); + if (do_send_unplug && !err) + pd_send_unplug_remote(peer_device); + return err; } @@ -1484,6 +1503,7 @@ int w_send_read_req(struct drbd_work *w, int cancel) struct drbd_device *device = req->device; struct drbd_peer_device *const peer_device = first_peer_device(device); struct drbd_connection *connection = peer_device->connection; + bool do_send_unplug = req->rq_state & RQ_UNPLUG; int err; if (unlikely(cancel)) { @@ -1501,6 +1521,9 @@ int w_send_read_req(struct drbd_work *w, int cancel) req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK); + if (do_send_unplug && !err) + pd_send_unplug_remote(peer_device); + return err; } @@ -1513,7 +1536,7 @@ int w_restart_disk_io(struct drbd_work *w, int cancel) drbd_al_begin_io(device, &req->i); drbd_req_make_private_bio(req, req->master_bio); - req->private_bio->bi_bdev = device->ldev->backing_bdev; + bio_set_dev(req->private_bio, device->ldev->backing_bdev); generic_make_request(req->private_bio); return 0; @@ -1733,6 +1756,11 @@ void drbd_start_resync(struct drbd_device *device, enum drbd_conns side) return; } + if (!connection) { + drbd_err(device, "No connection to peer, aborting!\n"); + return; + } + if (!test_bit(B_RS_H_DONE, &device->flags)) { if (side == C_SYNC_TARGET) { /* Since application IO was locked out during C_WF_BITMAP_T and diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 9c00f29e40c1..60c086a53609 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -4134,7 +4134,7 @@ static int __floppy_read_block_0(struct block_device *bdev, int drive) cbdata.drive = drive; bio_init(&bio, &bio_vec, 1); - bio.bi_bdev = bdev; + bio_set_dev(&bio, bdev); bio_add_page(&bio, page, size, 0); bio.bi_iter.bi_sector = 0; diff --git a/drivers/block/loop.c b/drivers/block/loop.c index ef8334949b42..407cb172d6e3 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -221,8 +221,7 @@ static void __loop_update_dio(struct loop_device *lo, bool dio) } static int -figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit, - loff_t logical_blocksize) +figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit) { loff_t size = get_size(offset, sizelimit, lo->lo_backing_file); sector_t x = (sector_t)size; @@ -234,12 +233,6 @@ figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit, lo->lo_offset = offset; if (lo->lo_sizelimit != sizelimit) lo->lo_sizelimit = sizelimit; - if (lo->lo_flags & LO_FLAGS_BLOCKSIZE) { - lo->lo_logical_blocksize = logical_blocksize; - blk_queue_physical_block_size(lo->lo_queue, lo->lo_blocksize); - blk_queue_logical_block_size(lo->lo_queue, - lo->lo_logical_blocksize); - } set_capacity(lo->lo_disk, x); bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9); /* let user-space know about the new size */ @@ -820,7 +813,6 @@ static void loop_config_discard(struct loop_device *lo) struct file *file = lo->lo_backing_file; struct inode *inode = file->f_mapping->host; struct request_queue *q = lo->lo_queue; - int lo_bits = 9; /* * We use punch hole to reclaim the free space used by the @@ -840,11 +832,9 @@ static void loop_config_discard(struct loop_device *lo) q->limits.discard_granularity = inode->i_sb->s_blocksize; q->limits.discard_alignment = 0; - if (lo->lo_flags & LO_FLAGS_BLOCKSIZE) - lo_bits = blksize_bits(lo->lo_logical_blocksize); - blk_queue_max_discard_sectors(q, UINT_MAX >> lo_bits); - blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> lo_bits); + blk_queue_max_discard_sectors(q, UINT_MAX >> 9); + blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> 9); queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); } @@ -938,7 +928,6 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, lo->use_dio = false; lo->lo_blocksize = lo_blocksize; - lo->lo_logical_blocksize = 512; lo->lo_device = bdev; lo->lo_flags = lo_flags; lo->lo_backing_file = file; @@ -1104,7 +1093,6 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info) int err; struct loop_func_table *xfer; kuid_t uid = current_uid(); - int lo_flags = lo->lo_flags; if (lo->lo_encrypt_key_size && !uid_eq(lo->lo_key_owner, uid) && @@ -1137,26 +1125,9 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info) if (err) goto exit; - if (info->lo_flags & LO_FLAGS_BLOCKSIZE) { - if (!(lo->lo_flags & LO_FLAGS_BLOCKSIZE)) - lo->lo_logical_blocksize = 512; - lo->lo_flags |= LO_FLAGS_BLOCKSIZE; - if (LO_INFO_BLOCKSIZE(info) != 512 && - LO_INFO_BLOCKSIZE(info) != 1024 && - LO_INFO_BLOCKSIZE(info) != 2048 && - LO_INFO_BLOCKSIZE(info) != 4096) - return -EINVAL; - if (LO_INFO_BLOCKSIZE(info) > lo->lo_blocksize) - return -EINVAL; - } - if (lo->lo_offset != info->lo_offset || - lo->lo_sizelimit != info->lo_sizelimit || - lo->lo_flags != lo_flags || - ((lo->lo_flags & LO_FLAGS_BLOCKSIZE) && - lo->lo_logical_blocksize != LO_INFO_BLOCKSIZE(info))) { - if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit, - LO_INFO_BLOCKSIZE(info))) { + lo->lo_sizelimit != info->lo_sizelimit) { + if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) { err = -EFBIG; goto exit; } @@ -1348,8 +1319,7 @@ static int loop_set_capacity(struct loop_device *lo) if (unlikely(lo->lo_state != Lo_bound)) return -ENXIO; - return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit, - lo->lo_logical_blocksize); + return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit); } static int loop_set_dio(struct loop_device *lo, unsigned long arg) @@ -1996,10 +1966,6 @@ static int __init loop_init(void) struct loop_device *lo; int err; - err = misc_register(&loop_misc); - if (err < 0) - return err; - part_shift = 0; if (max_part > 0) { part_shift = fls(max_part); @@ -2017,12 +1983,12 @@ static int __init loop_init(void) if ((1UL << part_shift) > DISK_MAX_PARTS) { err = -EINVAL; - goto misc_out; + goto err_out; } if (max_loop > 1UL << (MINORBITS - part_shift)) { err = -EINVAL; - goto misc_out; + goto err_out; } /* @@ -2041,6 +2007,11 @@ static int __init loop_init(void) range = 1UL << MINORBITS; } + err = misc_register(&loop_misc); + if (err < 0) + goto err_out; + + if (register_blkdev(LOOP_MAJOR, "loop")) { err = -EIO; goto misc_out; @@ -2060,6 +2031,7 @@ static int __init loop_init(void) misc_out: misc_deregister(&loop_misc); +err_out: return err; } diff --git a/drivers/block/loop.h b/drivers/block/loop.h index 2c096b9a17b8..fecd3f97ef8c 100644 --- a/drivers/block/loop.h +++ b/drivers/block/loop.h @@ -49,7 +49,6 @@ struct loop_device { struct file * lo_backing_file; struct block_device *lo_device; unsigned lo_blocksize; - unsigned lo_logical_blocksize; void *key_data; gfp_t old_gfp_mask; diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 5bdf923294a5..2aa87cbdede0 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -128,7 +128,7 @@ static struct dentry *nbd_dbg_dir; #define NBD_MAGIC 0x68797548 static unsigned int nbds_max = 16; -static int max_part; +static int max_part = 16; static struct workqueue_struct *recv_workqueue; static int part_shift; @@ -165,7 +165,7 @@ static ssize_t pid_show(struct device *dev, return sprintf(buf, "%d\n", task_pid_nr(nbd->task_recv)); } -static struct device_attribute pid_attr = { +static const struct device_attribute pid_attr = { .attr = { .name = "pid", .mode = S_IRUGO}, .show = pid_show, }; @@ -1584,6 +1584,15 @@ again: } } else { nbd = idr_find(&nbd_index_idr, index); + if (!nbd) { + ret = nbd_dev_add(index); + if (ret < 0) { + mutex_unlock(&nbd_index_mutex); + printk(KERN_ERR "nbd: failed to add new device\n"); + return ret; + } + nbd = idr_find(&nbd_index_idr, index); + } } if (!nbd) { printk(KERN_ERR "nbd: couldn't find device at index %d\n", @@ -2137,4 +2146,4 @@ MODULE_LICENSE("GPL"); module_param(nbds_max, int, 0444); MODULE_PARM_DESC(nbds_max, "number of network block devices to initialize (default: 16)"); module_param(max_part, int, 0444); -MODULE_PARM_DESC(max_part, "number of partitions per device (default: 0)"); +MODULE_PARM_DESC(max_part, "number of partitions per device (default: 16)"); diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 85c24cace973..8042c26ea9e6 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -1,3 +1,7 @@ +/* + * Add configfs and memory store: Kyungchan Koh <kkc6196@fb.com> and + * Shaohua Li <shli@fb.com> + */ #include <linux/module.h> #include <linux/moduleparam.h> @@ -9,27 +13,110 @@ #include <linux/blk-mq.h> #include <linux/hrtimer.h> #include <linux/lightnvm.h> +#include <linux/configfs.h> +#include <linux/badblocks.h> + +#define SECTOR_SHIFT 9 +#define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT) +#define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT) +#define SECTOR_SIZE (1 << SECTOR_SHIFT) +#define SECTOR_MASK (PAGE_SECTORS - 1) + +#define FREE_BATCH 16 + +#define TICKS_PER_SEC 50ULL +#define TIMER_INTERVAL (NSEC_PER_SEC / TICKS_PER_SEC) + +static inline u64 mb_per_tick(int mbps) +{ + return (1 << 20) / TICKS_PER_SEC * ((u64) mbps); +} struct nullb_cmd { struct list_head list; struct llist_node ll_list; - struct call_single_data csd; + call_single_data_t csd; struct request *rq; struct bio *bio; unsigned int tag; struct nullb_queue *nq; struct hrtimer timer; + blk_status_t error; }; struct nullb_queue { unsigned long *tag_map; wait_queue_head_t wait; unsigned int queue_depth; + struct nullb_device *dev; struct nullb_cmd *cmds; }; +/* + * Status flags for nullb_device. + * + * CONFIGURED: Device has been configured and turned on. Cannot reconfigure. + * UP: Device is currently on and visible in userspace. + * THROTTLED: Device is being throttled. + * CACHE: Device is using a write-back cache. + */ +enum nullb_device_flags { + NULLB_DEV_FL_CONFIGURED = 0, + NULLB_DEV_FL_UP = 1, + NULLB_DEV_FL_THROTTLED = 2, + NULLB_DEV_FL_CACHE = 3, +}; + +/* + * nullb_page is a page in memory for nullb devices. + * + * @page: The page holding the data. + * @bitmap: The bitmap represents which sector in the page has data. + * Each bit represents one block size. For example, sector 8 + * will use the 7th bit + * The highest 2 bits of bitmap are for special purpose. LOCK means the cache + * page is being flushing to storage. FREE means the cache page is freed and + * should be skipped from flushing to storage. Please see + * null_make_cache_space + */ +struct nullb_page { + struct page *page; + unsigned long bitmap; +}; +#define NULLB_PAGE_LOCK (sizeof(unsigned long) * 8 - 1) +#define NULLB_PAGE_FREE (sizeof(unsigned long) * 8 - 2) + +struct nullb_device { + struct nullb *nullb; + struct config_item item; + struct radix_tree_root data; /* data stored in the disk */ + struct radix_tree_root cache; /* disk cache data */ + unsigned long flags; /* device flags */ + unsigned int curr_cache; + struct badblocks badblocks; + + unsigned long size; /* device size in MB */ + unsigned long completion_nsec; /* time in ns to complete a request */ + unsigned long cache_size; /* disk cache size in MB */ + unsigned int submit_queues; /* number of submission queues */ + unsigned int home_node; /* home node for the device */ + unsigned int queue_mode; /* block interface */ + unsigned int blocksize; /* block size */ + unsigned int irqmode; /* IRQ completion handler */ + unsigned int hw_queue_depth; /* queue depth */ + unsigned int index; /* index of the disk, only valid with a disk */ + unsigned int mbps; /* Bandwidth throttle cap (in MB/s) */ + bool use_lightnvm; /* register as a LightNVM device */ + bool blocking; /* blocking blk-mq device */ + bool use_per_node_hctx; /* use per-node allocation for hardware context */ + bool power; /* power on/off the device */ + bool memory_backed; /* if data is stored in memory */ + bool discard; /* if support discard */ +}; + struct nullb { + struct nullb_device *dev; struct list_head list; unsigned int index; struct request_queue *q; @@ -37,8 +124,10 @@ struct nullb { struct nvm_dev *ndev; struct blk_mq_tag_set *tag_set; struct blk_mq_tag_set __tag_set; - struct hrtimer timer; unsigned int queue_depth; + atomic_long_t cur_bytes; + struct hrtimer bw_timer; + unsigned long cache_flush_pos; spinlock_t lock; struct nullb_queue *queues; @@ -49,7 +138,7 @@ struct nullb { static LIST_HEAD(nullb_list); static struct mutex lock; static int null_major; -static int nullb_indexes; +static DEFINE_IDA(nullb_indexes); static struct kmem_cache *ppa_cache; static struct blk_mq_tag_set tag_set; @@ -65,15 +154,15 @@ enum { NULL_Q_MQ = 2, }; -static int submit_queues; -module_param(submit_queues, int, S_IRUGO); +static int g_submit_queues = 1; +module_param_named(submit_queues, g_submit_queues, int, S_IRUGO); MODULE_PARM_DESC(submit_queues, "Number of submission queues"); -static int home_node = NUMA_NO_NODE; -module_param(home_node, int, S_IRUGO); +static int g_home_node = NUMA_NO_NODE; +module_param_named(home_node, g_home_node, int, S_IRUGO); MODULE_PARM_DESC(home_node, "Home node for the device"); -static int queue_mode = NULL_Q_MQ; +static int g_queue_mode = NULL_Q_MQ; static int null_param_store_val(const char *str, int *val, int min, int max) { @@ -92,7 +181,7 @@ static int null_param_store_val(const char *str, int *val, int min, int max) static int null_set_queue_mode(const char *str, const struct kernel_param *kp) { - return null_param_store_val(str, &queue_mode, NULL_Q_BIO, NULL_Q_MQ); + return null_param_store_val(str, &g_queue_mode, NULL_Q_BIO, NULL_Q_MQ); } static const struct kernel_param_ops null_queue_mode_param_ops = { @@ -100,38 +189,38 @@ static const struct kernel_param_ops null_queue_mode_param_ops = { .get = param_get_int, }; -device_param_cb(queue_mode, &null_queue_mode_param_ops, &queue_mode, S_IRUGO); +device_param_cb(queue_mode, &null_queue_mode_param_ops, &g_queue_mode, S_IRUGO); MODULE_PARM_DESC(queue_mode, "Block interface to use (0=bio,1=rq,2=multiqueue)"); -static int gb = 250; -module_param(gb, int, S_IRUGO); +static int g_gb = 250; +module_param_named(gb, g_gb, int, S_IRUGO); MODULE_PARM_DESC(gb, "Size in GB"); -static int bs = 512; -module_param(bs, int, S_IRUGO); +static int g_bs = 512; +module_param_named(bs, g_bs, int, S_IRUGO); MODULE_PARM_DESC(bs, "Block size (in bytes)"); static int nr_devices = 1; module_param(nr_devices, int, S_IRUGO); MODULE_PARM_DESC(nr_devices, "Number of devices to register"); -static bool use_lightnvm; -module_param(use_lightnvm, bool, S_IRUGO); +static bool g_use_lightnvm; +module_param_named(use_lightnvm, g_use_lightnvm, bool, S_IRUGO); MODULE_PARM_DESC(use_lightnvm, "Register as a LightNVM device"); -static bool blocking; -module_param(blocking, bool, S_IRUGO); +static bool g_blocking; +module_param_named(blocking, g_blocking, bool, S_IRUGO); MODULE_PARM_DESC(blocking, "Register as a blocking blk-mq driver device"); static bool shared_tags; module_param(shared_tags, bool, S_IRUGO); MODULE_PARM_DESC(shared_tags, "Share tag set between devices for blk-mq"); -static int irqmode = NULL_IRQ_SOFTIRQ; +static int g_irqmode = NULL_IRQ_SOFTIRQ; static int null_set_irqmode(const char *str, const struct kernel_param *kp) { - return null_param_store_val(str, &irqmode, NULL_IRQ_NONE, + return null_param_store_val(str, &g_irqmode, NULL_IRQ_NONE, NULL_IRQ_TIMER); } @@ -140,21 +229,358 @@ static const struct kernel_param_ops null_irqmode_param_ops = { .get = param_get_int, }; -device_param_cb(irqmode, &null_irqmode_param_ops, &irqmode, S_IRUGO); +device_param_cb(irqmode, &null_irqmode_param_ops, &g_irqmode, S_IRUGO); MODULE_PARM_DESC(irqmode, "IRQ completion handler. 0-none, 1-softirq, 2-timer"); -static unsigned long completion_nsec = 10000; -module_param(completion_nsec, ulong, S_IRUGO); +static unsigned long g_completion_nsec = 10000; +module_param_named(completion_nsec, g_completion_nsec, ulong, S_IRUGO); MODULE_PARM_DESC(completion_nsec, "Time in ns to complete a request in hardware. Default: 10,000ns"); -static int hw_queue_depth = 64; -module_param(hw_queue_depth, int, S_IRUGO); +static int g_hw_queue_depth = 64; +module_param_named(hw_queue_depth, g_hw_queue_depth, int, S_IRUGO); MODULE_PARM_DESC(hw_queue_depth, "Queue depth for each hardware queue. Default: 64"); -static bool use_per_node_hctx = false; -module_param(use_per_node_hctx, bool, S_IRUGO); +static bool g_use_per_node_hctx; +module_param_named(use_per_node_hctx, g_use_per_node_hctx, bool, S_IRUGO); MODULE_PARM_DESC(use_per_node_hctx, "Use per-node allocation for hardware context queues. Default: false"); +static struct nullb_device *null_alloc_dev(void); +static void null_free_dev(struct nullb_device *dev); +static void null_del_dev(struct nullb *nullb); +static int null_add_dev(struct nullb_device *dev); +static void null_free_device_storage(struct nullb_device *dev, bool is_cache); + +static inline struct nullb_device *to_nullb_device(struct config_item *item) +{ + return item ? container_of(item, struct nullb_device, item) : NULL; +} + +static inline ssize_t nullb_device_uint_attr_show(unsigned int val, char *page) +{ + return snprintf(page, PAGE_SIZE, "%u\n", val); +} + +static inline ssize_t nullb_device_ulong_attr_show(unsigned long val, + char *page) +{ + return snprintf(page, PAGE_SIZE, "%lu\n", val); +} + +static inline ssize_t nullb_device_bool_attr_show(bool val, char *page) +{ + return snprintf(page, PAGE_SIZE, "%u\n", val); +} + +static ssize_t nullb_device_uint_attr_store(unsigned int *val, + const char *page, size_t count) +{ + unsigned int tmp; + int result; + + result = kstrtouint(page, 0, &tmp); + if (result) + return result; + + *val = tmp; + return count; +} + +static ssize_t nullb_device_ulong_attr_store(unsigned long *val, + const char *page, size_t count) +{ + int result; + unsigned long tmp; + + result = kstrtoul(page, 0, &tmp); + if (result) + return result; + + *val = tmp; + return count; +} + +static ssize_t nullb_device_bool_attr_store(bool *val, const char *page, + size_t count) +{ + bool tmp; + int result; + + result = kstrtobool(page, &tmp); + if (result) + return result; + + *val = tmp; + return count; +} + +/* The following macro should only be used with TYPE = {uint, ulong, bool}. */ +#define NULLB_DEVICE_ATTR(NAME, TYPE) \ +static ssize_t \ +nullb_device_##NAME##_show(struct config_item *item, char *page) \ +{ \ + return nullb_device_##TYPE##_attr_show( \ + to_nullb_device(item)->NAME, page); \ +} \ +static ssize_t \ +nullb_device_##NAME##_store(struct config_item *item, const char *page, \ + size_t count) \ +{ \ + if (test_bit(NULLB_DEV_FL_CONFIGURED, &to_nullb_device(item)->flags)) \ + return -EBUSY; \ + return nullb_device_##TYPE##_attr_store( \ + &to_nullb_device(item)->NAME, page, count); \ +} \ +CONFIGFS_ATTR(nullb_device_, NAME); + +NULLB_DEVICE_ATTR(size, ulong); +NULLB_DEVICE_ATTR(completion_nsec, ulong); +NULLB_DEVICE_ATTR(submit_queues, uint); +NULLB_DEVICE_ATTR(home_node, uint); +NULLB_DEVICE_ATTR(queue_mode, uint); +NULLB_DEVICE_ATTR(blocksize, uint); +NULLB_DEVICE_ATTR(irqmode, uint); +NULLB_DEVICE_ATTR(hw_queue_depth, uint); +NULLB_DEVICE_ATTR(index, uint); +NULLB_DEVICE_ATTR(use_lightnvm, bool); +NULLB_DEVICE_ATTR(blocking, bool); +NULLB_DEVICE_ATTR(use_per_node_hctx, bool); +NULLB_DEVICE_ATTR(memory_backed, bool); +NULLB_DEVICE_ATTR(discard, bool); +NULLB_DEVICE_ATTR(mbps, uint); +NULLB_DEVICE_ATTR(cache_size, ulong); + +static ssize_t nullb_device_power_show(struct config_item *item, char *page) +{ + return nullb_device_bool_attr_show(to_nullb_device(item)->power, page); +} + +static ssize_t nullb_device_power_store(struct config_item *item, + const char *page, size_t count) +{ + struct nullb_device *dev = to_nullb_device(item); + bool newp = false; + ssize_t ret; + + ret = nullb_device_bool_attr_store(&newp, page, count); + if (ret < 0) + return ret; + + if (!dev->power && newp) { + if (test_and_set_bit(NULLB_DEV_FL_UP, &dev->flags)) + return count; + if (null_add_dev(dev)) { + clear_bit(NULLB_DEV_FL_UP, &dev->flags); + return -ENOMEM; + } + + set_bit(NULLB_DEV_FL_CONFIGURED, &dev->flags); + dev->power = newp; + } else if (dev->power && !newp) { + mutex_lock(&lock); + dev->power = newp; + null_del_dev(dev->nullb); + mutex_unlock(&lock); + clear_bit(NULLB_DEV_FL_UP, &dev->flags); + } + + return count; +} + +CONFIGFS_ATTR(nullb_device_, power); + +static ssize_t nullb_device_badblocks_show(struct config_item *item, char *page) +{ + struct nullb_device *t_dev = to_nullb_device(item); + + return badblocks_show(&t_dev->badblocks, page, 0); +} + +static ssize_t nullb_device_badblocks_store(struct config_item *item, + const char *page, size_t count) +{ + struct nullb_device *t_dev = to_nullb_device(item); + char *orig, *buf, *tmp; + u64 start, end; + int ret; + + orig = kstrndup(page, count, GFP_KERNEL); + if (!orig) + return -ENOMEM; + + buf = strstrip(orig); + + ret = -EINVAL; + if (buf[0] != '+' && buf[0] != '-') + goto out; + tmp = strchr(&buf[1], '-'); + if (!tmp) + goto out; + *tmp = '\0'; + ret = kstrtoull(buf + 1, 0, &start); + if (ret) + goto out; + ret = kstrtoull(tmp + 1, 0, &end); + if (ret) + goto out; + ret = -EINVAL; + if (start > end) + goto out; + /* enable badblocks */ + cmpxchg(&t_dev->badblocks.shift, -1, 0); + if (buf[0] == '+') + ret = badblocks_set(&t_dev->badblocks, start, + end - start + 1, 1); + else + ret = badblocks_clear(&t_dev->badblocks, start, + end - start + 1); + if (ret == 0) + ret = count; +out: + kfree(orig); + return ret; +} +CONFIGFS_ATTR(nullb_device_, badblocks); + +static struct configfs_attribute *nullb_device_attrs[] = { + &nullb_device_attr_size, + &nullb_device_attr_completion_nsec, + &nullb_device_attr_submit_queues, + &nullb_device_attr_home_node, + &nullb_device_attr_queue_mode, + &nullb_device_attr_blocksize, + &nullb_device_attr_irqmode, + &nullb_device_attr_hw_queue_depth, + &nullb_device_attr_index, + &nullb_device_attr_use_lightnvm, + &nullb_device_attr_blocking, + &nullb_device_attr_use_per_node_hctx, + &nullb_device_attr_power, + &nullb_device_attr_memory_backed, + &nullb_device_attr_discard, + &nullb_device_attr_mbps, + &nullb_device_attr_cache_size, + &nullb_device_attr_badblocks, + NULL, +}; + +static void nullb_device_release(struct config_item *item) +{ + struct nullb_device *dev = to_nullb_device(item); + + badblocks_exit(&dev->badblocks); + null_free_device_storage(dev, false); + null_free_dev(dev); +} + +static struct configfs_item_operations nullb_device_ops = { + .release = nullb_device_release, +}; + +static struct config_item_type nullb_device_type = { + .ct_item_ops = &nullb_device_ops, + .ct_attrs = nullb_device_attrs, + .ct_owner = THIS_MODULE, +}; + +static struct +config_item *nullb_group_make_item(struct config_group *group, const char *name) +{ + struct nullb_device *dev; + + dev = null_alloc_dev(); + if (!dev) + return ERR_PTR(-ENOMEM); + + config_item_init_type_name(&dev->item, name, &nullb_device_type); + + return &dev->item; +} + +static void +nullb_group_drop_item(struct config_group *group, struct config_item *item) +{ + struct nullb_device *dev = to_nullb_device(item); + + if (test_and_clear_bit(NULLB_DEV_FL_UP, &dev->flags)) { + mutex_lock(&lock); + dev->power = false; + null_del_dev(dev->nullb); + mutex_unlock(&lock); + } + + config_item_put(item); +} + +static ssize_t memb_group_features_show(struct config_item *item, char *page) +{ + return snprintf(page, PAGE_SIZE, "memory_backed,discard,bandwidth,cache,badblocks\n"); +} + +CONFIGFS_ATTR_RO(memb_group_, features); + +static struct configfs_attribute *nullb_group_attrs[] = { + &memb_group_attr_features, + NULL, +}; + +static struct configfs_group_operations nullb_group_ops = { + .make_item = nullb_group_make_item, + .drop_item = nullb_group_drop_item, +}; + +static struct config_item_type nullb_group_type = { + .ct_group_ops = &nullb_group_ops, + .ct_attrs = nullb_group_attrs, + .ct_owner = THIS_MODULE, +}; + +static struct configfs_subsystem nullb_subsys = { + .su_group = { + .cg_item = { + .ci_namebuf = "nullb", + .ci_type = &nullb_group_type, + }, + }, +}; + +static inline int null_cache_active(struct nullb *nullb) +{ + return test_bit(NULLB_DEV_FL_CACHE, &nullb->dev->flags); +} + +static struct nullb_device *null_alloc_dev(void) +{ + struct nullb_device *dev; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return NULL; + INIT_RADIX_TREE(&dev->data, GFP_ATOMIC); + INIT_RADIX_TREE(&dev->cache, GFP_ATOMIC); + if (badblocks_init(&dev->badblocks, 0)) { + kfree(dev); + return NULL; + } + + dev->size = g_gb * 1024; + dev->completion_nsec = g_completion_nsec; + dev->submit_queues = g_submit_queues; + dev->home_node = g_home_node; + dev->queue_mode = g_queue_mode; + dev->blocksize = g_bs; + dev->irqmode = g_irqmode; + dev->hw_queue_depth = g_hw_queue_depth; + dev->use_lightnvm = g_use_lightnvm; + dev->blocking = g_blocking; + dev->use_per_node_hctx = g_use_per_node_hctx; + return dev; +} + +static void null_free_dev(struct nullb_device *dev) +{ + kfree(dev); +} + static void put_tag(struct nullb_queue *nq, unsigned int tag) { clear_bit_unlock(tag, nq->tag_map); @@ -193,7 +619,7 @@ static struct nullb_cmd *__alloc_cmd(struct nullb_queue *nq) cmd = &nq->cmds[tag]; cmd->tag = tag; cmd->nq = nq; - if (irqmode == NULL_IRQ_TIMER) { + if (nq->dev->irqmode == NULL_IRQ_TIMER) { hrtimer_init(&cmd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); cmd->timer.function = null_cmd_timer_expired; @@ -229,19 +655,21 @@ static struct nullb_cmd *alloc_cmd(struct nullb_queue *nq, int can_wait) static void end_cmd(struct nullb_cmd *cmd) { struct request_queue *q = NULL; + int queue_mode = cmd->nq->dev->queue_mode; if (cmd->rq) q = cmd->rq->q; switch (queue_mode) { case NULL_Q_MQ: - blk_mq_end_request(cmd->rq, BLK_STS_OK); + blk_mq_end_request(cmd->rq, cmd->error); return; case NULL_Q_RQ: INIT_LIST_HEAD(&cmd->rq->queuelist); - blk_end_request_all(cmd->rq, BLK_STS_OK); + blk_end_request_all(cmd->rq, cmd->error); break; case NULL_Q_BIO: + cmd->bio->bi_status = cmd->error; bio_endio(cmd->bio); break; } @@ -267,25 +695,582 @@ static enum hrtimer_restart null_cmd_timer_expired(struct hrtimer *timer) static void null_cmd_end_timer(struct nullb_cmd *cmd) { - ktime_t kt = completion_nsec; + ktime_t kt = cmd->nq->dev->completion_nsec; hrtimer_start(&cmd->timer, kt, HRTIMER_MODE_REL); } static void null_softirq_done_fn(struct request *rq) { - if (queue_mode == NULL_Q_MQ) + struct nullb *nullb = rq->q->queuedata; + + if (nullb->dev->queue_mode == NULL_Q_MQ) end_cmd(blk_mq_rq_to_pdu(rq)); else end_cmd(rq->special); } -static inline void null_handle_cmd(struct nullb_cmd *cmd) +static struct nullb_page *null_alloc_page(gfp_t gfp_flags) +{ + struct nullb_page *t_page; + + t_page = kmalloc(sizeof(struct nullb_page), gfp_flags); + if (!t_page) + goto out; + + t_page->page = alloc_pages(gfp_flags, 0); + if (!t_page->page) + goto out_freepage; + + t_page->bitmap = 0; + return t_page; +out_freepage: + kfree(t_page); +out: + return NULL; +} + +static void null_free_page(struct nullb_page *t_page) +{ + __set_bit(NULLB_PAGE_FREE, &t_page->bitmap); + if (test_bit(NULLB_PAGE_LOCK, &t_page->bitmap)) + return; + __free_page(t_page->page); + kfree(t_page); +} + +static void null_free_sector(struct nullb *nullb, sector_t sector, + bool is_cache) +{ + unsigned int sector_bit; + u64 idx; + struct nullb_page *t_page, *ret; + struct radix_tree_root *root; + + root = is_cache ? &nullb->dev->cache : &nullb->dev->data; + idx = sector >> PAGE_SECTORS_SHIFT; + sector_bit = (sector & SECTOR_MASK); + + t_page = radix_tree_lookup(root, idx); + if (t_page) { + __clear_bit(sector_bit, &t_page->bitmap); + + if (!t_page->bitmap) { + ret = radix_tree_delete_item(root, idx, t_page); + WARN_ON(ret != t_page); + null_free_page(ret); + if (is_cache) + nullb->dev->curr_cache -= PAGE_SIZE; + } + } +} + +static struct nullb_page *null_radix_tree_insert(struct nullb *nullb, u64 idx, + struct nullb_page *t_page, bool is_cache) +{ + struct radix_tree_root *root; + + root = is_cache ? &nullb->dev->cache : &nullb->dev->data; + + if (radix_tree_insert(root, idx, t_page)) { + null_free_page(t_page); + t_page = radix_tree_lookup(root, idx); + WARN_ON(!t_page || t_page->page->index != idx); + } else if (is_cache) + nullb->dev->curr_cache += PAGE_SIZE; + + return t_page; +} + +static void null_free_device_storage(struct nullb_device *dev, bool is_cache) +{ + unsigned long pos = 0; + int nr_pages; + struct nullb_page *ret, *t_pages[FREE_BATCH]; + struct radix_tree_root *root; + + root = is_cache ? &dev->cache : &dev->data; + + do { + int i; + + nr_pages = radix_tree_gang_lookup(root, + (void **)t_pages, pos, FREE_BATCH); + + for (i = 0; i < nr_pages; i++) { + pos = t_pages[i]->page->index; + ret = radix_tree_delete_item(root, pos, t_pages[i]); + WARN_ON(ret != t_pages[i]); + null_free_page(ret); + } + + pos++; + } while (nr_pages == FREE_BATCH); + + if (is_cache) + dev->curr_cache = 0; +} + +static struct nullb_page *__null_lookup_page(struct nullb *nullb, + sector_t sector, bool for_write, bool is_cache) +{ + unsigned int sector_bit; + u64 idx; + struct nullb_page *t_page; + struct radix_tree_root *root; + + idx = sector >> PAGE_SECTORS_SHIFT; + sector_bit = (sector & SECTOR_MASK); + + root = is_cache ? &nullb->dev->cache : &nullb->dev->data; + t_page = radix_tree_lookup(root, idx); + WARN_ON(t_page && t_page->page->index != idx); + + if (t_page && (for_write || test_bit(sector_bit, &t_page->bitmap))) + return t_page; + + return NULL; +} + +static struct nullb_page *null_lookup_page(struct nullb *nullb, + sector_t sector, bool for_write, bool ignore_cache) +{ + struct nullb_page *page = NULL; + + if (!ignore_cache) + page = __null_lookup_page(nullb, sector, for_write, true); + if (page) + return page; + return __null_lookup_page(nullb, sector, for_write, false); +} + +static struct nullb_page *null_insert_page(struct nullb *nullb, + sector_t sector, bool ignore_cache) +{ + u64 idx; + struct nullb_page *t_page; + + t_page = null_lookup_page(nullb, sector, true, ignore_cache); + if (t_page) + return t_page; + + spin_unlock_irq(&nullb->lock); + + t_page = null_alloc_page(GFP_NOIO); + if (!t_page) + goto out_lock; + + if (radix_tree_preload(GFP_NOIO)) + goto out_freepage; + + spin_lock_irq(&nullb->lock); + idx = sector >> PAGE_SECTORS_SHIFT; + t_page->page->index = idx; + t_page = null_radix_tree_insert(nullb, idx, t_page, !ignore_cache); + radix_tree_preload_end(); + + return t_page; +out_freepage: + null_free_page(t_page); +out_lock: + spin_lock_irq(&nullb->lock); + return null_lookup_page(nullb, sector, true, ignore_cache); +} + +static int null_flush_cache_page(struct nullb *nullb, struct nullb_page *c_page) +{ + int i; + unsigned int offset; + u64 idx; + struct nullb_page *t_page, *ret; + void *dst, *src; + + idx = c_page->page->index; + + t_page = null_insert_page(nullb, idx << PAGE_SECTORS_SHIFT, true); + + __clear_bit(NULLB_PAGE_LOCK, &c_page->bitmap); + if (test_bit(NULLB_PAGE_FREE, &c_page->bitmap)) { + null_free_page(c_page); + if (t_page && t_page->bitmap == 0) { + ret = radix_tree_delete_item(&nullb->dev->data, + idx, t_page); + null_free_page(t_page); + } + return 0; + } + + if (!t_page) + return -ENOMEM; + + src = kmap_atomic(c_page->page); + dst = kmap_atomic(t_page->page); + + for (i = 0; i < PAGE_SECTORS; + i += (nullb->dev->blocksize >> SECTOR_SHIFT)) { + if (test_bit(i, &c_page->bitmap)) { + offset = (i << SECTOR_SHIFT); + memcpy(dst + offset, src + offset, + nullb->dev->blocksize); + __set_bit(i, &t_page->bitmap); + } + } + + kunmap_atomic(dst); + kunmap_atomic(src); + + ret = radix_tree_delete_item(&nullb->dev->cache, idx, c_page); + null_free_page(ret); + nullb->dev->curr_cache -= PAGE_SIZE; + + return 0; +} + +static int null_make_cache_space(struct nullb *nullb, unsigned long n) { + int i, err, nr_pages; + struct nullb_page *c_pages[FREE_BATCH]; + unsigned long flushed = 0, one_round; + +again: + if ((nullb->dev->cache_size * 1024 * 1024) > + nullb->dev->curr_cache + n || nullb->dev->curr_cache == 0) + return 0; + + nr_pages = radix_tree_gang_lookup(&nullb->dev->cache, + (void **)c_pages, nullb->cache_flush_pos, FREE_BATCH); + /* + * nullb_flush_cache_page could unlock before using the c_pages. To + * avoid race, we don't allow page free + */ + for (i = 0; i < nr_pages; i++) { + nullb->cache_flush_pos = c_pages[i]->page->index; + /* + * We found the page which is being flushed to disk by other + * threads + */ + if (test_bit(NULLB_PAGE_LOCK, &c_pages[i]->bitmap)) + c_pages[i] = NULL; + else + __set_bit(NULLB_PAGE_LOCK, &c_pages[i]->bitmap); + } + + one_round = 0; + for (i = 0; i < nr_pages; i++) { + if (c_pages[i] == NULL) + continue; + err = null_flush_cache_page(nullb, c_pages[i]); + if (err) + return err; + one_round++; + } + flushed += one_round << PAGE_SHIFT; + + if (n > flushed) { + if (nr_pages == 0) + nullb->cache_flush_pos = 0; + if (one_round == 0) { + /* give other threads a chance */ + spin_unlock_irq(&nullb->lock); + spin_lock_irq(&nullb->lock); + } + goto again; + } + return 0; +} + +static int copy_to_nullb(struct nullb *nullb, struct page *source, + unsigned int off, sector_t sector, size_t n, bool is_fua) +{ + size_t temp, count = 0; + unsigned int offset; + struct nullb_page *t_page; + void *dst, *src; + + while (count < n) { + temp = min_t(size_t, nullb->dev->blocksize, n - count); + + if (null_cache_active(nullb) && !is_fua) + null_make_cache_space(nullb, PAGE_SIZE); + + offset = (sector & SECTOR_MASK) << SECTOR_SHIFT; + t_page = null_insert_page(nullb, sector, + !null_cache_active(nullb) || is_fua); + if (!t_page) + return -ENOSPC; + + src = kmap_atomic(source); + dst = kmap_atomic(t_page->page); + memcpy(dst + offset, src + off + count, temp); + kunmap_atomic(dst); + kunmap_atomic(src); + + __set_bit(sector & SECTOR_MASK, &t_page->bitmap); + + if (is_fua) + null_free_sector(nullb, sector, true); + + count += temp; + sector += temp >> SECTOR_SHIFT; + } + return 0; +} + +static int copy_from_nullb(struct nullb *nullb, struct page *dest, + unsigned int off, sector_t sector, size_t n) +{ + size_t temp, count = 0; + unsigned int offset; + struct nullb_page *t_page; + void *dst, *src; + + while (count < n) { + temp = min_t(size_t, nullb->dev->blocksize, n - count); + + offset = (sector & SECTOR_MASK) << SECTOR_SHIFT; + t_page = null_lookup_page(nullb, sector, false, + !null_cache_active(nullb)); + + dst = kmap_atomic(dest); + if (!t_page) { + memset(dst + off + count, 0, temp); + goto next; + } + src = kmap_atomic(t_page->page); + memcpy(dst + off + count, src + offset, temp); + kunmap_atomic(src); +next: + kunmap_atomic(dst); + + count += temp; + sector += temp >> SECTOR_SHIFT; + } + return 0; +} + +static void null_handle_discard(struct nullb *nullb, sector_t sector, size_t n) +{ + size_t temp; + + spin_lock_irq(&nullb->lock); + while (n > 0) { + temp = min_t(size_t, n, nullb->dev->blocksize); + null_free_sector(nullb, sector, false); + if (null_cache_active(nullb)) + null_free_sector(nullb, sector, true); + sector += temp >> SECTOR_SHIFT; + n -= temp; + } + spin_unlock_irq(&nullb->lock); +} + +static int null_handle_flush(struct nullb *nullb) +{ + int err; + + if (!null_cache_active(nullb)) + return 0; + + spin_lock_irq(&nullb->lock); + while (true) { + err = null_make_cache_space(nullb, + nullb->dev->cache_size * 1024 * 1024); + if (err || nullb->dev->curr_cache == 0) + break; + } + + WARN_ON(!radix_tree_empty(&nullb->dev->cache)); + spin_unlock_irq(&nullb->lock); + return err; +} + +static int null_transfer(struct nullb *nullb, struct page *page, + unsigned int len, unsigned int off, bool is_write, sector_t sector, + bool is_fua) +{ + int err = 0; + + if (!is_write) { + err = copy_from_nullb(nullb, page, off, sector, len); + flush_dcache_page(page); + } else { + flush_dcache_page(page); + err = copy_to_nullb(nullb, page, off, sector, len, is_fua); + } + + return err; +} + +static int null_handle_rq(struct nullb_cmd *cmd) +{ + struct request *rq = cmd->rq; + struct nullb *nullb = cmd->nq->dev->nullb; + int err; + unsigned int len; + sector_t sector; + struct req_iterator iter; + struct bio_vec bvec; + + sector = blk_rq_pos(rq); + + if (req_op(rq) == REQ_OP_DISCARD) { + null_handle_discard(nullb, sector, blk_rq_bytes(rq)); + return 0; + } + + spin_lock_irq(&nullb->lock); + rq_for_each_segment(bvec, rq, iter) { + len = bvec.bv_len; + err = null_transfer(nullb, bvec.bv_page, len, bvec.bv_offset, + op_is_write(req_op(rq)), sector, + req_op(rq) & REQ_FUA); + if (err) { + spin_unlock_irq(&nullb->lock); + return err; + } + sector += len >> SECTOR_SHIFT; + } + spin_unlock_irq(&nullb->lock); + + return 0; +} + +static int null_handle_bio(struct nullb_cmd *cmd) +{ + struct bio *bio = cmd->bio; + struct nullb *nullb = cmd->nq->dev->nullb; + int err; + unsigned int len; + sector_t sector; + struct bio_vec bvec; + struct bvec_iter iter; + + sector = bio->bi_iter.bi_sector; + + if (bio_op(bio) == REQ_OP_DISCARD) { + null_handle_discard(nullb, sector, + bio_sectors(bio) << SECTOR_SHIFT); + return 0; + } + + spin_lock_irq(&nullb->lock); + bio_for_each_segment(bvec, bio, iter) { + len = bvec.bv_len; + err = null_transfer(nullb, bvec.bv_page, len, bvec.bv_offset, + op_is_write(bio_op(bio)), sector, + bio_op(bio) & REQ_FUA); + if (err) { + spin_unlock_irq(&nullb->lock); + return err; + } + sector += len >> SECTOR_SHIFT; + } + spin_unlock_irq(&nullb->lock); + return 0; +} + +static void null_stop_queue(struct nullb *nullb) +{ + struct request_queue *q = nullb->q; + + if (nullb->dev->queue_mode == NULL_Q_MQ) + blk_mq_stop_hw_queues(q); + else { + spin_lock_irq(q->queue_lock); + blk_stop_queue(q); + spin_unlock_irq(q->queue_lock); + } +} + +static void null_restart_queue_async(struct nullb *nullb) +{ + struct request_queue *q = nullb->q; + unsigned long flags; + + if (nullb->dev->queue_mode == NULL_Q_MQ) + blk_mq_start_stopped_hw_queues(q, true); + else { + spin_lock_irqsave(q->queue_lock, flags); + blk_start_queue_async(q); + spin_unlock_irqrestore(q->queue_lock, flags); + } +} + +static blk_status_t null_handle_cmd(struct nullb_cmd *cmd) +{ + struct nullb_device *dev = cmd->nq->dev; + struct nullb *nullb = dev->nullb; + int err = 0; + + if (test_bit(NULLB_DEV_FL_THROTTLED, &dev->flags)) { + struct request *rq = cmd->rq; + + if (!hrtimer_active(&nullb->bw_timer)) + hrtimer_restart(&nullb->bw_timer); + + if (atomic_long_sub_return(blk_rq_bytes(rq), + &nullb->cur_bytes) < 0) { + null_stop_queue(nullb); + /* race with timer */ + if (atomic_long_read(&nullb->cur_bytes) > 0) + null_restart_queue_async(nullb); + if (dev->queue_mode == NULL_Q_RQ) { + struct request_queue *q = nullb->q; + + spin_lock_irq(q->queue_lock); + rq->rq_flags |= RQF_DONTPREP; + blk_requeue_request(q, rq); + spin_unlock_irq(q->queue_lock); + return BLK_STS_OK; + } else + /* requeue request */ + return BLK_STS_RESOURCE; + } + } + + if (nullb->dev->badblocks.shift != -1) { + int bad_sectors; + sector_t sector, size, first_bad; + bool is_flush = true; + + if (dev->queue_mode == NULL_Q_BIO && + bio_op(cmd->bio) != REQ_OP_FLUSH) { + is_flush = false; + sector = cmd->bio->bi_iter.bi_sector; + size = bio_sectors(cmd->bio); + } + if (dev->queue_mode != NULL_Q_BIO && + req_op(cmd->rq) != REQ_OP_FLUSH) { + is_flush = false; + sector = blk_rq_pos(cmd->rq); + size = blk_rq_sectors(cmd->rq); + } + if (!is_flush && badblocks_check(&nullb->dev->badblocks, sector, + size, &first_bad, &bad_sectors)) { + cmd->error = BLK_STS_IOERR; + goto out; + } + } + + if (dev->memory_backed) { + if (dev->queue_mode == NULL_Q_BIO) { + if (bio_op(cmd->bio) == REQ_OP_FLUSH) + err = null_handle_flush(nullb); + else + err = null_handle_bio(cmd); + } else { + if (req_op(cmd->rq) == REQ_OP_FLUSH) + err = null_handle_flush(nullb); + else + err = null_handle_rq(cmd); + } + } + cmd->error = errno_to_blk_status(err); +out: /* Complete IO by inline, softirq or timer */ - switch (irqmode) { + switch (dev->irqmode) { case NULL_IRQ_SOFTIRQ: - switch (queue_mode) { + switch (dev->queue_mode) { case NULL_Q_MQ: blk_mq_complete_request(cmd->rq); break; @@ -307,6 +1292,34 @@ static inline void null_handle_cmd(struct nullb_cmd *cmd) null_cmd_end_timer(cmd); break; } + return BLK_STS_OK; +} + +static enum hrtimer_restart nullb_bwtimer_fn(struct hrtimer *timer) +{ + struct nullb *nullb = container_of(timer, struct nullb, bw_timer); + ktime_t timer_interval = ktime_set(0, TIMER_INTERVAL); + unsigned int mbps = nullb->dev->mbps; + + if (atomic_long_read(&nullb->cur_bytes) == mb_per_tick(mbps)) + return HRTIMER_NORESTART; + + atomic_long_set(&nullb->cur_bytes, mb_per_tick(mbps)); + null_restart_queue_async(nullb); + + hrtimer_forward_now(&nullb->bw_timer, timer_interval); + + return HRTIMER_RESTART; +} + +static void nullb_setup_bwtimer(struct nullb *nullb) +{ + ktime_t timer_interval = ktime_set(0, TIMER_INTERVAL); + + hrtimer_init(&nullb->bw_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + nullb->bw_timer.function = nullb_bwtimer_fn; + atomic_long_set(&nullb->cur_bytes, mb_per_tick(nullb->dev->mbps)); + hrtimer_start(&nullb->bw_timer, timer_interval, HRTIMER_MODE_REL); } static struct nullb_queue *nullb_to_queue(struct nullb *nullb) @@ -366,20 +1379,20 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { struct nullb_cmd *cmd = blk_mq_rq_to_pdu(bd->rq); + struct nullb_queue *nq = hctx->driver_data; might_sleep_if(hctx->flags & BLK_MQ_F_BLOCKING); - if (irqmode == NULL_IRQ_TIMER) { + if (nq->dev->irqmode == NULL_IRQ_TIMER) { hrtimer_init(&cmd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); cmd->timer.function = null_cmd_timer_expired; } cmd->rq = bd->rq; - cmd->nq = hctx->driver_data; + cmd->nq = nq; blk_mq_start_request(bd->rq); - null_handle_cmd(cmd); - return BLK_STS_OK; + return null_handle_cmd(cmd); } static const struct blk_mq_ops null_mq_ops = { @@ -438,7 +1451,8 @@ static int null_lnvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id) { - sector_t size = gb * 1024 * 1024 * 1024ULL; + struct nullb *nullb = dev->q->queuedata; + sector_t size = (sector_t)nullb->dev->size * 1024 * 1024ULL; sector_t blksize; struct nvm_id_group *grp; @@ -460,7 +1474,7 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id) id->ppaf.ch_offset = 56; id->ppaf.ch_len = 8; - sector_div(size, bs); /* convert size to pages */ + sector_div(size, nullb->dev->blocksize); /* convert size to pages */ size >>= 8; /* concert size to pgs pr blk */ grp = &id->grp; grp->mtype = 0; @@ -474,8 +1488,8 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id) grp->num_blk = blksize; grp->num_pln = 1; - grp->fpg_sz = bs; - grp->csecs = bs; + grp->fpg_sz = nullb->dev->blocksize; + grp->csecs = nullb->dev->blocksize; grp->trdt = 25000; grp->trdm = 25000; grp->tprt = 500000; @@ -483,7 +1497,7 @@ static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id) grp->tbet = 1500000; grp->tbem = 1500000; grp->mpos = 0x010101; /* single plane rwe */ - grp->cpar = hw_queue_depth; + grp->cpar = nullb->dev->hw_queue_depth; return 0; } @@ -568,19 +1582,44 @@ static void null_nvm_unregister(struct nullb *nullb) {} static void null_del_dev(struct nullb *nullb) { + struct nullb_device *dev = nullb->dev; + + ida_simple_remove(&nullb_indexes, nullb->index); + list_del_init(&nullb->list); - if (use_lightnvm) + if (dev->use_lightnvm) null_nvm_unregister(nullb); else del_gendisk(nullb->disk); + + if (test_bit(NULLB_DEV_FL_THROTTLED, &nullb->dev->flags)) { + hrtimer_cancel(&nullb->bw_timer); + atomic_long_set(&nullb->cur_bytes, LONG_MAX); + null_restart_queue_async(nullb); + } + blk_cleanup_queue(nullb->q); - if (queue_mode == NULL_Q_MQ && nullb->tag_set == &nullb->__tag_set) + if (dev->queue_mode == NULL_Q_MQ && + nullb->tag_set == &nullb->__tag_set) blk_mq_free_tag_set(nullb->tag_set); - if (!use_lightnvm) + if (!dev->use_lightnvm) put_disk(nullb->disk); cleanup_queues(nullb); + if (null_cache_active(nullb)) + null_free_device_storage(nullb->dev, true); kfree(nullb); + dev->nullb = NULL; +} + +static void null_config_discard(struct nullb *nullb) +{ + if (nullb->dev->discard == false) + return; + nullb->q->limits.discard_granularity = nullb->dev->blocksize; + nullb->q->limits.discard_alignment = nullb->dev->blocksize; + blk_queue_max_discard_sectors(nullb->q, UINT_MAX >> 9); + queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, nullb->q); } static int null_open(struct block_device *bdev, fmode_t mode) @@ -605,6 +1644,7 @@ static void null_init_queue(struct nullb *nullb, struct nullb_queue *nq) init_waitqueue_head(&nq->wait); nq->queue_depth = nullb->queue_depth; + nq->dev = nullb->dev; } static void null_init_queues(struct nullb *nullb) @@ -652,13 +1692,13 @@ static int setup_commands(struct nullb_queue *nq) static int setup_queues(struct nullb *nullb) { - nullb->queues = kzalloc(submit_queues * sizeof(struct nullb_queue), - GFP_KERNEL); + nullb->queues = kzalloc(nullb->dev->submit_queues * + sizeof(struct nullb_queue), GFP_KERNEL); if (!nullb->queues) return -ENOMEM; nullb->nr_queues = 0; - nullb->queue_depth = hw_queue_depth; + nullb->queue_depth = nullb->dev->hw_queue_depth; return 0; } @@ -668,7 +1708,7 @@ static int init_driver_queues(struct nullb *nullb) struct nullb_queue *nq; int i, ret = 0; - for (i = 0; i < submit_queues; i++) { + for (i = 0; i < nullb->dev->submit_queues; i++) { nq = &nullb->queues[i]; null_init_queue(nullb, nq); @@ -686,10 +1726,10 @@ static int null_gendisk_register(struct nullb *nullb) struct gendisk *disk; sector_t size; - disk = nullb->disk = alloc_disk_node(1, home_node); + disk = nullb->disk = alloc_disk_node(1, nullb->dev->home_node); if (!disk) return -ENOMEM; - size = gb * 1024 * 1024 * 1024ULL; + size = (sector_t)nullb->dev->size * 1024 * 1024ULL; set_capacity(disk, size >> 9); disk->flags |= GENHD_FL_EXT_DEVT | GENHD_FL_SUPPRESS_PARTITION_INFO; @@ -704,49 +1744,86 @@ static int null_gendisk_register(struct nullb *nullb) return 0; } -static int null_init_tag_set(struct blk_mq_tag_set *set) +static int null_init_tag_set(struct nullb *nullb, struct blk_mq_tag_set *set) { set->ops = &null_mq_ops; - set->nr_hw_queues = submit_queues; - set->queue_depth = hw_queue_depth; - set->numa_node = home_node; + set->nr_hw_queues = nullb ? nullb->dev->submit_queues : + g_submit_queues; + set->queue_depth = nullb ? nullb->dev->hw_queue_depth : + g_hw_queue_depth; + set->numa_node = nullb ? nullb->dev->home_node : g_home_node; set->cmd_size = sizeof(struct nullb_cmd); set->flags = BLK_MQ_F_SHOULD_MERGE; set->driver_data = NULL; - if (blocking) + if ((nullb && nullb->dev->blocking) || g_blocking) set->flags |= BLK_MQ_F_BLOCKING; return blk_mq_alloc_tag_set(set); } -static int null_add_dev(void) +static void null_validate_conf(struct nullb_device *dev) +{ + dev->blocksize = round_down(dev->blocksize, 512); + dev->blocksize = clamp_t(unsigned int, dev->blocksize, 512, 4096); + if (dev->use_lightnvm && dev->blocksize != 4096) + dev->blocksize = 4096; + + if (dev->use_lightnvm && dev->queue_mode != NULL_Q_MQ) + dev->queue_mode = NULL_Q_MQ; + + if (dev->queue_mode == NULL_Q_MQ && dev->use_per_node_hctx) { + if (dev->submit_queues != nr_online_nodes) + dev->submit_queues = nr_online_nodes; + } else if (dev->submit_queues > nr_cpu_ids) + dev->submit_queues = nr_cpu_ids; + else if (dev->submit_queues == 0) + dev->submit_queues = 1; + + dev->queue_mode = min_t(unsigned int, dev->queue_mode, NULL_Q_MQ); + dev->irqmode = min_t(unsigned int, dev->irqmode, NULL_IRQ_TIMER); + + /* Do memory allocation, so set blocking */ + if (dev->memory_backed) + dev->blocking = true; + else /* cache is meaningless */ + dev->cache_size = 0; + dev->cache_size = min_t(unsigned long, ULONG_MAX / 1024 / 1024, + dev->cache_size); + dev->mbps = min_t(unsigned int, 1024 * 40, dev->mbps); + /* can not stop a queue */ + if (dev->queue_mode == NULL_Q_BIO) + dev->mbps = 0; +} + +static int null_add_dev(struct nullb_device *dev) { struct nullb *nullb; int rv; - nullb = kzalloc_node(sizeof(*nullb), GFP_KERNEL, home_node); + null_validate_conf(dev); + + nullb = kzalloc_node(sizeof(*nullb), GFP_KERNEL, dev->home_node); if (!nullb) { rv = -ENOMEM; goto out; } + nullb->dev = dev; + dev->nullb = nullb; spin_lock_init(&nullb->lock); - if (queue_mode == NULL_Q_MQ && use_per_node_hctx) - submit_queues = nr_online_nodes; - rv = setup_queues(nullb); if (rv) goto out_free_nullb; - if (queue_mode == NULL_Q_MQ) { + if (dev->queue_mode == NULL_Q_MQ) { if (shared_tags) { nullb->tag_set = &tag_set; rv = 0; } else { nullb->tag_set = &nullb->__tag_set; - rv = null_init_tag_set(nullb->tag_set); + rv = null_init_tag_set(nullb, nullb->tag_set); } if (rv) @@ -758,8 +1835,8 @@ static int null_add_dev(void) goto out_cleanup_tags; } null_init_queues(nullb); - } else if (queue_mode == NULL_Q_BIO) { - nullb->q = blk_alloc_queue_node(GFP_KERNEL, home_node); + } else if (dev->queue_mode == NULL_Q_BIO) { + nullb->q = blk_alloc_queue_node(GFP_KERNEL, dev->home_node); if (!nullb->q) { rv = -ENOMEM; goto out_cleanup_queues; @@ -769,7 +1846,8 @@ static int null_add_dev(void) if (rv) goto out_cleanup_blk_queue; } else { - nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock, home_node); + nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock, + dev->home_node); if (!nullb->q) { rv = -ENOMEM; goto out_cleanup_queues; @@ -781,20 +1859,34 @@ static int null_add_dev(void) goto out_cleanup_blk_queue; } + if (dev->mbps) { + set_bit(NULLB_DEV_FL_THROTTLED, &dev->flags); + nullb_setup_bwtimer(nullb); + } + + if (dev->cache_size > 0) { + set_bit(NULLB_DEV_FL_CACHE, &nullb->dev->flags); + blk_queue_write_cache(nullb->q, true, true); + blk_queue_flush_queueable(nullb->q, true); + } + nullb->q->queuedata = nullb; queue_flag_set_unlocked(QUEUE_FLAG_NONROT, nullb->q); queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, nullb->q); mutex_lock(&lock); - nullb->index = nullb_indexes++; + nullb->index = ida_simple_get(&nullb_indexes, 0, 0, GFP_KERNEL); + dev->index = nullb->index; mutex_unlock(&lock); - blk_queue_logical_block_size(nullb->q, bs); - blk_queue_physical_block_size(nullb->q, bs); + blk_queue_logical_block_size(nullb->q, dev->blocksize); + blk_queue_physical_block_size(nullb->q, dev->blocksize); + + null_config_discard(nullb); sprintf(nullb->disk_name, "nullb%d", nullb->index); - if (use_lightnvm) + if (dev->use_lightnvm) rv = null_nvm_register(nullb); else rv = null_gendisk_register(nullb); @@ -810,7 +1902,7 @@ static int null_add_dev(void) out_cleanup_blk_queue: blk_cleanup_queue(nullb->q); out_cleanup_tags: - if (queue_mode == NULL_Q_MQ && nullb->tag_set == &nullb->__tag_set) + if (dev->queue_mode == NULL_Q_MQ && nullb->tag_set == &nullb->__tag_set) blk_mq_free_tag_set(nullb->tag_set); out_cleanup_queues: cleanup_queues(nullb); @@ -825,51 +1917,63 @@ static int __init null_init(void) int ret = 0; unsigned int i; struct nullb *nullb; + struct nullb_device *dev; + + /* check for nullb_page.bitmap */ + if (sizeof(unsigned long) * 8 - 2 < (PAGE_SIZE >> SECTOR_SHIFT)) + return -EINVAL; - if (bs > PAGE_SIZE) { + if (g_bs > PAGE_SIZE) { pr_warn("null_blk: invalid block size\n"); pr_warn("null_blk: defaults block size to %lu\n", PAGE_SIZE); - bs = PAGE_SIZE; + g_bs = PAGE_SIZE; } - if (use_lightnvm && bs != 4096) { + if (g_use_lightnvm && g_bs != 4096) { pr_warn("null_blk: LightNVM only supports 4k block size\n"); pr_warn("null_blk: defaults block size to 4k\n"); - bs = 4096; + g_bs = 4096; } - if (use_lightnvm && queue_mode != NULL_Q_MQ) { + if (g_use_lightnvm && g_queue_mode != NULL_Q_MQ) { pr_warn("null_blk: LightNVM only supported for blk-mq\n"); pr_warn("null_blk: defaults queue mode to blk-mq\n"); - queue_mode = NULL_Q_MQ; + g_queue_mode = NULL_Q_MQ; } - if (queue_mode == NULL_Q_MQ && use_per_node_hctx) { - if (submit_queues < nr_online_nodes) { - pr_warn("null_blk: submit_queues param is set to %u.", + if (g_queue_mode == NULL_Q_MQ && g_use_per_node_hctx) { + if (g_submit_queues != nr_online_nodes) { + pr_warn("null_blk: submit_queues param is set to %u.\n", nr_online_nodes); - submit_queues = nr_online_nodes; + g_submit_queues = nr_online_nodes; } - } else if (submit_queues > nr_cpu_ids) - submit_queues = nr_cpu_ids; - else if (!submit_queues) - submit_queues = 1; + } else if (g_submit_queues > nr_cpu_ids) + g_submit_queues = nr_cpu_ids; + else if (g_submit_queues <= 0) + g_submit_queues = 1; - if (queue_mode == NULL_Q_MQ && shared_tags) { - ret = null_init_tag_set(&tag_set); + if (g_queue_mode == NULL_Q_MQ && shared_tags) { + ret = null_init_tag_set(NULL, &tag_set); if (ret) return ret; } + config_group_init(&nullb_subsys.su_group); + mutex_init(&nullb_subsys.su_mutex); + + ret = configfs_register_subsystem(&nullb_subsys); + if (ret) + goto err_tagset; + mutex_init(&lock); null_major = register_blkdev(0, "nullb"); if (null_major < 0) { ret = null_major; - goto err_tagset; + goto err_conf; } - if (use_lightnvm) { + if (g_use_lightnvm) { ppa_cache = kmem_cache_create("ppa_cache", 64 * sizeof(u64), 0, 0, NULL); if (!ppa_cache) { @@ -880,9 +1984,14 @@ static int __init null_init(void) } for (i = 0; i < nr_devices; i++) { - ret = null_add_dev(); - if (ret) + dev = null_alloc_dev(); + if (!dev) + goto err_dev; + ret = null_add_dev(dev); + if (ret) { + null_free_dev(dev); goto err_dev; + } } pr_info("null: module loaded\n"); @@ -891,13 +2000,17 @@ static int __init null_init(void) err_dev: while (!list_empty(&nullb_list)) { nullb = list_entry(nullb_list.next, struct nullb, list); + dev = nullb->dev; null_del_dev(nullb); + null_free_dev(dev); } kmem_cache_destroy(ppa_cache); err_ppa: unregister_blkdev(null_major, "nullb"); +err_conf: + configfs_unregister_subsystem(&nullb_subsys); err_tagset: - if (queue_mode == NULL_Q_MQ && shared_tags) + if (g_queue_mode == NULL_Q_MQ && shared_tags) blk_mq_free_tag_set(&tag_set); return ret; } @@ -906,16 +2019,22 @@ static void __exit null_exit(void) { struct nullb *nullb; + configfs_unregister_subsystem(&nullb_subsys); + unregister_blkdev(null_major, "nullb"); mutex_lock(&lock); while (!list_empty(&nullb_list)) { + struct nullb_device *dev; + nullb = list_entry(nullb_list.next, struct nullb, list); + dev = nullb->dev; null_del_dev(nullb); + null_free_dev(dev); } mutex_unlock(&lock); - if (queue_mode == NULL_Q_MQ && shared_tags) + if (g_queue_mode == NULL_Q_MQ && shared_tags) blk_mq_free_tag_set(&tag_set); kmem_cache_destroy(ppa_cache); @@ -924,5 +2043,5 @@ static void __exit null_exit(void) module_init(null_init); module_exit(null_exit); -MODULE_AUTHOR("Jens Axboe <jaxboe@fusionio.com>"); +MODULE_AUTHOR("Jens Axboe <axboe@kernel.dk>"); MODULE_LICENSE("GPL"); diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 6b8b097abbb9..67974796c350 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -1028,7 +1028,7 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt) bio = pkt->r_bios[f]; bio_reset(bio); bio->bi_iter.bi_sector = pkt->sector + f * (CD_FRAMESIZE >> 9); - bio->bi_bdev = pd->bdev; + bio_set_dev(bio, pd->bdev); bio->bi_end_io = pkt_end_io_read; bio->bi_private = pkt; @@ -1122,7 +1122,7 @@ static int pkt_start_recovery(struct packet_data *pkt) pkt->sector = new_sector; bio_reset(pkt->bio); - pkt->bio->bi_bdev = pd->bdev; + bio_set_set(pkt->bio, pd->bdev); bio_set_op_attrs(pkt->bio, REQ_OP_WRITE, 0); pkt->bio->bi_iter.bi_sector = new_sector; pkt->bio->bi_iter.bi_size = pkt->frames * CD_FRAMESIZE; @@ -1267,7 +1267,7 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt) bio_reset(pkt->w_bio); pkt->w_bio->bi_iter.bi_sector = pkt->sector; - pkt->w_bio->bi_bdev = pd->bdev; + bio_set_dev(pkt->w_bio, pd->bdev); pkt->w_bio->bi_end_io = pkt_end_io_packet_write; pkt->w_bio->bi_private = pkt; @@ -2314,7 +2314,7 @@ static void pkt_make_request_read(struct pktcdvd_device *pd, struct bio *bio) psd->pd = pd; psd->bio = bio; - cloned_bio->bi_bdev = pd->bdev; + bio_set_dev(cloned_bio, pd->bdev); cloned_bio->bi_private = psd; cloned_bio->bi_end_io = pkt_end_io_read_cloned; pd->stats.secs_r += bio_sectors(bio); @@ -2415,8 +2415,7 @@ static blk_qc_t pkt_make_request(struct request_queue *q, struct bio *bio) pd = q->queuedata; if (!pd) { - pr_err("%s incorrect request queue\n", - bdevname(bio->bi_bdev, b)); + pr_err("%s incorrect request queue\n", bio_devname(bio, b)); goto end_io; } diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c index e0e81cacd781..6a55959cbf78 100644 --- a/drivers/block/ps3vram.c +++ b/drivers/block/ps3vram.c @@ -409,10 +409,8 @@ static int ps3vram_cache_init(struct ps3_system_bus_device *dev) priv->cache.page_size = CACHE_PAGE_SIZE; priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) * CACHE_PAGE_COUNT, GFP_KERNEL); - if (priv->cache.tags == NULL) { - dev_err(&dev->core, "Could not allocate cache tags\n"); + if (!priv->cache.tags) return -ENOMEM; - } dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n", CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024); @@ -743,7 +741,11 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev) goto out_unmap_reports; } - ps3vram_cache_init(dev); + error = ps3vram_cache_init(dev); + if (error < 0) { + goto out_unmap_reports; + } + ps3vram_proc_init(dev); queue = blk_alloc_queue(GFP_KERNEL); diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c index 7f4acebf4657..e397d3ee7308 100644 --- a/drivers/block/rsxx/dev.c +++ b/drivers/block/rsxx/dev.c @@ -112,7 +112,7 @@ static const struct block_device_operations rsxx_fops = { static void disk_stats_start(struct rsxx_cardinfo *card, struct bio *bio) { - generic_start_io_acct(bio_data_dir(bio), bio_sectors(bio), + generic_start_io_acct(card->queue, bio_data_dir(bio), bio_sectors(bio), &card->gendisk->part0); } @@ -120,8 +120,8 @@ static void disk_stats_complete(struct rsxx_cardinfo *card, struct bio *bio, unsigned long start_time) { - generic_end_io_acct(bio_data_dir(bio), &card->gendisk->part0, - start_time); + generic_end_io_acct(card->queue, bio_data_dir(bio), + &card->gendisk->part0, start_time); } static void bio_dma_done_cb(struct rsxx_cardinfo *card, diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c index d0368682bd43..7cedb4295e9d 100644 --- a/drivers/block/skd_main.c +++ b/drivers/block/skd_main.c @@ -1,19 +1,12 @@ -/* Copyright 2012 STEC, Inc. +/* + * Driver for sTec s1120 PCIe SSDs. sTec was acquired in 2013 by HGST and HGST + * was acquired by Western Digital in 2012. + * + * Copyright 2012 sTec, Inc. + * Copyright (c) 2017 Western Digital Corporation or its affiliates. * - * This file is licensed under the terms of the 3-clause - * BSD License (http://opensource.org/licenses/BSD-3-Clause) - * or the GNU GPL-2.0 (http://www.gnu.org/licenses/gpl-2.0.html), - * at your option. Both licenses are also available in the LICENSE file - * distributed with this project. This file may not be copied, modified, - * or distributed except in accordance with those terms. - * Gordoni Waidhofer <gwaidhofer@stec-inc.com> - * Initial Driver Design! - * Thomas Swann <tswann@stec-inc.com> - * Interrupt handling. - * Ramprasad Chinthekindi <rchinthekindi@stec-inc.com> - * biomode implementation. - * Akhil Bhansali <abhansali@stec-inc.com> - * Added support for DISCARD / FLUSH and FUA. + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. */ #include <linux/kernel.h> @@ -23,11 +16,11 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/blkdev.h> +#include <linux/blk-mq.h> #include <linux/sched.h> #include <linux/interrupt.h> #include <linux/compiler.h> #include <linux/workqueue.h> -#include <linux/bitops.h> #include <linux/delay.h> #include <linux/time.h> #include <linux/hdreg.h> @@ -37,9 +30,9 @@ #include <linux/version.h> #include <linux/err.h> #include <linux/aer.h> -#include <linux/ctype.h> #include <linux/wait.h> -#include <linux/uio.h> +#include <linux/stringify.h> +#include <linux/slab_def.h> #include <scsi/scsi.h> #include <scsi/sg.h> #include <linux/io.h> @@ -51,19 +44,6 @@ static int skd_dbg_level; static int skd_isr_comp_limit = 4; -enum { - STEC_LINK_2_5GTS = 0, - STEC_LINK_5GTS = 1, - STEC_LINK_8GTS = 2, - STEC_LINK_UNKNOWN = 0xFF -}; - -enum { - SKD_FLUSH_INITIALIZER, - SKD_FLUSH_ZERO_SIZE_FIRST, - SKD_FLUSH_DATA_SECOND, -}; - #define SKD_ASSERT(expr) \ do { \ if (unlikely(!(expr))) { \ @@ -73,17 +53,11 @@ enum { } while (0) #define DRV_NAME "skd" -#define DRV_VERSION "2.2.1" -#define DRV_BUILD_ID "0260" #define PFX DRV_NAME ": " -#define DRV_BIN_VERSION 0x100 -#define DRV_VER_COMPL "2.2.1." DRV_BUILD_ID -MODULE_AUTHOR("bug-reports: support@stec-inc.com"); -MODULE_LICENSE("Dual BSD/GPL"); +MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver (b" DRV_BUILD_ID ")"); -MODULE_VERSION(DRV_VERSION "-" DRV_BUILD_ID); +MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver"); #define PCI_VENDOR_ID_STEC 0x1B39 #define PCI_DEVICE_ID_S1120 0x0001 @@ -96,34 +70,32 @@ MODULE_VERSION(DRV_VERSION "-" DRV_BUILD_ID); #define SKD_PAUSE_TIMEOUT (5 * 1000) #define SKD_N_FITMSG_BYTES (512u) +#define SKD_MAX_REQ_PER_MSG 14 -#define SKD_N_SPECIAL_CONTEXT 32u #define SKD_N_SPECIAL_FITMSG_BYTES (128u) /* SG elements are 32 bytes, so we can make this 4096 and still be under the * 128KB limit. That allows 4096*4K = 16M xfer size */ #define SKD_N_SG_PER_REQ_DEFAULT 256u -#define SKD_N_SG_PER_SPECIAL 256u #define SKD_N_COMPLETION_ENTRY 256u #define SKD_N_READ_CAP_BYTES (8u) #define SKD_N_INTERNAL_BYTES (512u) +#define SKD_SKCOMP_SIZE \ + ((sizeof(struct fit_completion_entry_v1) + \ + sizeof(struct fit_comp_error_info)) * SKD_N_COMPLETION_ENTRY) + /* 5 bits of uniqifier, 0xF800 */ -#define SKD_ID_INCR (0x400) #define SKD_ID_TABLE_MASK (3u << 8u) #define SKD_ID_RW_REQUEST (0u << 8u) #define SKD_ID_INTERNAL (1u << 8u) -#define SKD_ID_SPECIAL_REQUEST (2u << 8u) #define SKD_ID_FIT_MSG (3u << 8u) #define SKD_ID_SLOT_MASK 0x00FFu #define SKD_ID_SLOT_AND_TABLE_MASK 0x03FFu -#define SKD_N_TIMEOUT_SLOT 4u -#define SKD_TIMEOUT_SLOT_MASK 3u - #define SKD_N_MAX_SECTORS 2048u #define SKD_MAX_RETRIES 2u @@ -141,7 +113,6 @@ enum skd_drvr_state { SKD_DRVR_STATE_ONLINE, SKD_DRVR_STATE_PAUSING, SKD_DRVR_STATE_PAUSED, - SKD_DRVR_STATE_DRAINING_TIMEOUT, SKD_DRVR_STATE_RESTARTING, SKD_DRVR_STATE_RESUMING, SKD_DRVR_STATE_STOPPING, @@ -158,7 +129,6 @@ enum skd_drvr_state { #define SKD_WAIT_BOOT_TIMO SKD_TIMER_SECONDS(90u) #define SKD_STARTING_TIMO SKD_TIMER_SECONDS(8u) #define SKD_RESTARTING_TIMO SKD_TIMER_MINUTES(4u) -#define SKD_DRAINING_TIMO SKD_TIMER_SECONDS(6u) #define SKD_BUSY_TIMO SKD_TIMER_MINUTES(20u) #define SKD_STARTED_BUSY_TIMO SKD_TIMER_SECONDS(60u) #define SKD_START_WAIT_SECONDS 90u @@ -169,12 +139,6 @@ enum skd_req_state { SKD_REQ_STATE_BUSY, SKD_REQ_STATE_COMPLETED, SKD_REQ_STATE_TIMEOUT, - SKD_REQ_STATE_ABORTED, -}; - -enum skd_fit_msg_state { - SKD_MSG_STATE_IDLE, - SKD_MSG_STATE_BUSY, }; enum skd_check_status_action { @@ -185,34 +149,29 @@ enum skd_check_status_action { SKD_CHECK_STATUS_BUSY_IMMINENT, }; -struct skd_fitmsg_context { - enum skd_fit_msg_state state; - - struct skd_fitmsg_context *next; +struct skd_msg_buf { + struct fit_msg_hdr fmh; + struct skd_scsi_request scsi[SKD_MAX_REQ_PER_MSG]; +}; +struct skd_fitmsg_context { u32 id; - u16 outstanding; u32 length; - u32 offset; - u8 *msg_buf; + struct skd_msg_buf *msg_buf; dma_addr_t mb_dma_address; }; struct skd_request_context { enum skd_req_state state; - struct skd_request_context *next; - u16 id; u32 fitmsg_id; - struct request *req; u8 flush_cmd; - u32 timeout_stamp; - u8 sg_data_dir; + enum dma_data_direction data_dir; struct scatterlist *sg; u32 n_sg; u32 sg_byte_count; @@ -224,38 +183,19 @@ struct skd_request_context { struct fit_comp_error_info err_info; + blk_status_t status; }; -#define SKD_DATA_DIR_HOST_TO_CARD 1 -#define SKD_DATA_DIR_CARD_TO_HOST 2 struct skd_special_context { struct skd_request_context req; - u8 orphaned; - void *data_buf; dma_addr_t db_dma_address; - u8 *msg_buf; + struct skd_msg_buf *msg_buf; dma_addr_t mb_dma_address; }; -struct skd_sg_io { - fmode_t mode; - void __user *argp; - - struct sg_io_hdr sg; - - u8 cdb[16]; - - u32 dxfer_len; - u32 iovcnt; - struct sg_iovec *iov; - struct sg_iovec no_iov_iov; - - struct skd_special_context *skspcl; -}; - typedef enum skd_irq_type { SKD_IRQ_LEGACY, SKD_IRQ_MSI, @@ -265,7 +205,7 @@ typedef enum skd_irq_type { #define SKD_MAX_BARS 2 struct skd_device { - volatile void __iomem *mem_map[SKD_MAX_BARS]; + void __iomem *mem_map[SKD_MAX_BARS]; resource_size_t mem_phys[SKD_MAX_BARS]; u32 mem_size[SKD_MAX_BARS]; @@ -276,21 +216,20 @@ struct skd_device { spinlock_t lock; struct gendisk *disk; + struct blk_mq_tag_set tag_set; struct request_queue *queue; + struct skd_fitmsg_context *skmsg; struct device *class_dev; int gendisk_on; int sync_done; - atomic_t device_count; u32 devno; u32 major; - char name[32]; char isr_name[30]; enum skd_drvr_state state; u32 drive_state; - u32 in_flight; u32 cur_max_queue_depth; u32 queue_low_water_mark; u32 dev_max_queue_depth; @@ -298,27 +237,20 @@ struct skd_device { u32 num_fitmsg_context; u32 num_req_context; - u32 timeout_slot[SKD_N_TIMEOUT_SLOT]; - u32 timeout_stamp; - struct skd_fitmsg_context *skmsg_free_list; struct skd_fitmsg_context *skmsg_table; - struct skd_request_context *skreq_free_list; - struct skd_request_context *skreq_table; - - struct skd_special_context *skspcl_free_list; - struct skd_special_context *skspcl_table; - struct skd_special_context internal_skspcl; u32 read_cap_blocksize; u32 read_cap_last_lba; int read_cap_is_valid; int inquiry_is_valid; u8 inq_serial_num[13]; /*12 chars plus null term */ - u8 id_str[80]; /* holds a composite name (pci + sernum) */ u8 skcomp_cycle; u32 skcomp_ix; + struct kmem_cache *msgbuf_cache; + struct kmem_cache *sglist_cache; + struct kmem_cache *databuf_cache; struct fit_completion_entry_v1 *skcomp_table; struct fit_comp_error_info *skerr_table; dma_addr_t cq_dma_address; @@ -329,7 +261,6 @@ struct skd_device { u32 timer_countdown; u32 timer_substate; - int n_special; int sgs_per_request; u32 last_mtd; @@ -343,7 +274,7 @@ struct skd_device { u32 timo_slot; - + struct work_struct start_queue; struct work_struct completion_worker; }; @@ -353,53 +284,32 @@ struct skd_device { static inline u32 skd_reg_read32(struct skd_device *skdev, u32 offset) { - u32 val; - - if (likely(skdev->dbg_level < 2)) - return readl(skdev->mem_map[1] + offset); - else { - barrier(); - val = readl(skdev->mem_map[1] + offset); - barrier(); - pr_debug("%s:%s:%d offset %x = %x\n", - skdev->name, __func__, __LINE__, offset, val); - return val; - } + u32 val = readl(skdev->mem_map[1] + offset); + if (unlikely(skdev->dbg_level >= 2)) + dev_dbg(&skdev->pdev->dev, "offset %x = %x\n", offset, val); + return val; } static inline void skd_reg_write32(struct skd_device *skdev, u32 val, u32 offset) { - if (likely(skdev->dbg_level < 2)) { - writel(val, skdev->mem_map[1] + offset); - barrier(); - } else { - barrier(); - writel(val, skdev->mem_map[1] + offset); - barrier(); - pr_debug("%s:%s:%d offset %x = %x\n", - skdev->name, __func__, __LINE__, offset, val); - } + writel(val, skdev->mem_map[1] + offset); + if (unlikely(skdev->dbg_level >= 2)) + dev_dbg(&skdev->pdev->dev, "offset %x = %x\n", offset, val); } static inline void skd_reg_write64(struct skd_device *skdev, u64 val, u32 offset) { - if (likely(skdev->dbg_level < 2)) { - writeq(val, skdev->mem_map[1] + offset); - barrier(); - } else { - barrier(); - writeq(val, skdev->mem_map[1] + offset); - barrier(); - pr_debug("%s:%s:%d offset %x = %016llx\n", - skdev->name, __func__, __LINE__, offset, val); - } + writeq(val, skdev->mem_map[1] + offset); + if (unlikely(skdev->dbg_level >= 2)) + dev_dbg(&skdev->pdev->dev, "offset %x = %016llx\n", offset, + val); } -#define SKD_IRQ_DEFAULT SKD_IRQ_MSI +#define SKD_IRQ_DEFAULT SKD_IRQ_MSIX static int skd_isr_type = SKD_IRQ_DEFAULT; module_param(skd_isr_type, int, 0444); @@ -412,7 +322,7 @@ static int skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; module_param(skd_max_req_per_msg, int, 0444); MODULE_PARM_DESC(skd_max_req_per_msg, "Maximum SCSI requests packed in a single message." - " (1-14, default==1)"); + " (1-" __stringify(SKD_MAX_REQ_PER_MSG) ", default==1)"); #define SKD_MAX_QUEUE_DEPTH_DEFAULT 64 #define SKD_MAX_QUEUE_DEPTH_DEFAULT_STR "64" @@ -429,10 +339,10 @@ MODULE_PARM_DESC(skd_sgs_per_request, "Maximum SG elements per block request." " (1-4096, default==256)"); -static int skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; +static int skd_max_pass_thru = 1; module_param(skd_max_pass_thru, int, 0444); MODULE_PARM_DESC(skd_max_pass_thru, - "Maximum SCSI pass-thru at a time." " (1-50, default==32)"); + "Maximum SCSI pass-thru at a time. IGNORED"); module_param(skd_dbg_level, int, 0444); MODULE_PARM_DESC(skd_dbg_level, "s1120 debug level (0,1,2)"); @@ -449,9 +359,6 @@ static void skd_send_fitmsg(struct skd_device *skdev, struct skd_fitmsg_context *skmsg); static void skd_send_special_fitmsg(struct skd_device *skdev, struct skd_special_context *skspcl); -static void skd_request_fn(struct request_queue *rq); -static void skd_end_request(struct skd_device *skdev, - struct skd_request_context *skreq, blk_status_t status); static bool skd_preop_sg_list(struct skd_device *skdev, struct skd_request_context *skreq); static void skd_postop_sg_list(struct skd_device *skdev, @@ -460,19 +367,14 @@ static void skd_postop_sg_list(struct skd_device *skdev, static void skd_restart_device(struct skd_device *skdev); static int skd_quiesce_dev(struct skd_device *skdev); static int skd_unquiesce_dev(struct skd_device *skdev); -static void skd_release_special(struct skd_device *skdev, - struct skd_special_context *skspcl); static void skd_disable_interrupts(struct skd_device *skdev); static void skd_isr_fwstate(struct skd_device *skdev); -static void skd_recover_requests(struct skd_device *skdev, int requeue); +static void skd_recover_requests(struct skd_device *skdev); static void skd_soft_reset(struct skd_device *skdev); -static const char *skd_name(struct skd_device *skdev); const char *skd_drive_state_to_str(int state); const char *skd_skdev_state_to_str(enum skd_drvr_state state); static void skd_log_skdev(struct skd_device *skdev, const char *event); -static void skd_log_skmsg(struct skd_device *skdev, - struct skd_fitmsg_context *skmsg, const char *event); static void skd_log_skreq(struct skd_device *skdev, struct skd_request_context *skreq, const char *event); @@ -481,18 +383,20 @@ static void skd_log_skreq(struct skd_device *skdev, * READ/WRITE REQUESTS ***************************************************************************** */ -static void skd_fail_all_pending(struct skd_device *skdev) +static void skd_inc_in_flight(struct request *rq, void *data, bool reserved) { - struct request_queue *q = skdev->queue; - struct request *req; + int *count = data; - for (;; ) { - req = blk_peek_request(q); - if (req == NULL) - break; - blk_start_request(req); - __blk_end_request_all(req, BLK_STS_IOERR); - } + count++; +} + +static int skd_in_flight(struct skd_device *skdev) +{ + int count = 0; + + blk_mq_tagset_busy_iter(&skdev->tag_set, skd_inc_in_flight, &count); + + return count; } static void @@ -501,9 +405,9 @@ skd_prep_rw_cdb(struct skd_scsi_request *scsi_req, unsigned count) { if (data_dir == READ) - scsi_req->cdb[0] = 0x28; + scsi_req->cdb[0] = READ_10; else - scsi_req->cdb[0] = 0x2a; + scsi_req->cdb[0] = WRITE_10; scsi_req->cdb[1] = 0; scsi_req->cdb[2] = (lba & 0xff000000) >> 24; @@ -522,7 +426,7 @@ skd_prep_zerosize_flush_cdb(struct skd_scsi_request *scsi_req, { skreq->flush_cmd = 1; - scsi_req->cdb[0] = 0x35; + scsi_req->cdb[0] = SYNCHRONIZE_CACHE; scsi_req->cdb[1] = 0; scsi_req->cdb[2] = 0; scsi_req->cdb[3] = 0; @@ -534,307 +438,194 @@ skd_prep_zerosize_flush_cdb(struct skd_scsi_request *scsi_req, scsi_req->cdb[9] = 0; } -static void skd_request_fn_not_online(struct request_queue *q); - -static void skd_request_fn(struct request_queue *q) +/* + * Return true if and only if all pending requests should be failed. + */ +static bool skd_fail_all(struct request_queue *q) { struct skd_device *skdev = q->queuedata; - struct skd_fitmsg_context *skmsg = NULL; - struct fit_msg_hdr *fmh = NULL; - struct skd_request_context *skreq; - struct request *req = NULL; - struct skd_scsi_request *scsi_req; - unsigned long io_flags; - u32 lba; - u32 count; - int data_dir; - u32 be_lba; - u32 be_count; - u64 be_dmaa; - u64 cmdctxt; - u32 timo_slot; - void *cmd_ptr; - int flush, fua; - - if (skdev->state != SKD_DRVR_STATE_ONLINE) { - skd_request_fn_not_online(q); - return; - } - if (blk_queue_stopped(skdev->queue)) { - if (skdev->skmsg_free_list == NULL || - skdev->skreq_free_list == NULL || - skdev->in_flight >= skdev->queue_low_water_mark) - /* There is still some kind of shortage */ - return; - - queue_flag_clear(QUEUE_FLAG_STOPPED, skdev->queue); - } + SKD_ASSERT(skdev->state != SKD_DRVR_STATE_ONLINE); - /* - * Stop conditions: - * - There are no more native requests - * - There are already the maximum number of requests in progress - * - There are no more skd_request_context entries - * - There are no more FIT msg buffers + skd_log_skdev(skdev, "req_not_online"); + switch (skdev->state) { + case SKD_DRVR_STATE_PAUSING: + case SKD_DRVR_STATE_PAUSED: + case SKD_DRVR_STATE_STARTING: + case SKD_DRVR_STATE_RESTARTING: + case SKD_DRVR_STATE_WAIT_BOOT: + /* In case of starting, we haven't started the queue, + * so we can't get here... but requests are + * possibly hanging out waiting for us because we + * reported the dev/skd0 already. They'll wait + * forever if connect doesn't complete. + * What to do??? delay dev/skd0 ?? */ - for (;; ) { - - flush = fua = 0; - - req = blk_peek_request(q); - - /* Are there any native requests to start? */ - if (req == NULL) - break; - - lba = (u32)blk_rq_pos(req); - count = blk_rq_sectors(req); - data_dir = rq_data_dir(req); - io_flags = req->cmd_flags; - - if (req_op(req) == REQ_OP_FLUSH) - flush++; - - if (io_flags & REQ_FUA) - fua++; - - pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) " - "count=%u(0x%x) dir=%d\n", - skdev->name, __func__, __LINE__, - req, lba, lba, count, count, data_dir); - - /* At this point we know there is a request */ + case SKD_DRVR_STATE_BUSY: + case SKD_DRVR_STATE_BUSY_IMMINENT: + case SKD_DRVR_STATE_BUSY_ERASE: + return false; - /* Are too many requets already in progress? */ - if (skdev->in_flight >= skdev->cur_max_queue_depth) { - pr_debug("%s:%s:%d qdepth %d, limit %d\n", - skdev->name, __func__, __LINE__, - skdev->in_flight, skdev->cur_max_queue_depth); - break; - } + case SKD_DRVR_STATE_BUSY_SANITIZE: + case SKD_DRVR_STATE_STOPPING: + case SKD_DRVR_STATE_SYNCING: + case SKD_DRVR_STATE_FAULT: + case SKD_DRVR_STATE_DISAPPEARED: + default: + return true; + } +} - /* Is a skd_request_context available? */ - skreq = skdev->skreq_free_list; - if (skreq == NULL) { - pr_debug("%s:%s:%d Out of req=%p\n", - skdev->name, __func__, __LINE__, q); - break; - } - SKD_ASSERT(skreq->state == SKD_REQ_STATE_IDLE); - SKD_ASSERT((skreq->id & SKD_ID_INCR) == 0); - - /* Now we check to see if we can get a fit msg */ - if (skmsg == NULL) { - if (skdev->skmsg_free_list == NULL) { - pr_debug("%s:%s:%d Out of msg\n", - skdev->name, __func__, __LINE__); - break; - } - } +static blk_status_t skd_mq_queue_rq(struct blk_mq_hw_ctx *hctx, + const struct blk_mq_queue_data *mqd) +{ + struct request *const req = mqd->rq; + struct request_queue *const q = req->q; + struct skd_device *skdev = q->queuedata; + struct skd_fitmsg_context *skmsg; + struct fit_msg_hdr *fmh; + const u32 tag = blk_mq_unique_tag(req); + struct skd_request_context *const skreq = blk_mq_rq_to_pdu(req); + struct skd_scsi_request *scsi_req; + unsigned long flags = 0; + const u32 lba = blk_rq_pos(req); + const u32 count = blk_rq_sectors(req); + const int data_dir = rq_data_dir(req); - skreq->flush_cmd = 0; - skreq->n_sg = 0; - skreq->sg_byte_count = 0; + if (unlikely(skdev->state != SKD_DRVR_STATE_ONLINE)) + return skd_fail_all(q) ? BLK_STS_IOERR : BLK_STS_RESOURCE; - /* - * OK to now dequeue request from q. - * - * At this point we are comitted to either start or reject - * the native request. Note that skd_request_context is - * available but is still at the head of the free list. - */ - blk_start_request(req); - skreq->req = req; - skreq->fitmsg_id = 0; - - /* Either a FIT msg is in progress or we have to start one. */ - if (skmsg == NULL) { - /* Are there any FIT msg buffers available? */ - skmsg = skdev->skmsg_free_list; - if (skmsg == NULL) { - pr_debug("%s:%s:%d Out of msg skdev=%p\n", - skdev->name, __func__, __LINE__, - skdev); - break; - } - SKD_ASSERT(skmsg->state == SKD_MSG_STATE_IDLE); - SKD_ASSERT((skmsg->id & SKD_ID_INCR) == 0); + blk_mq_start_request(req); - skdev->skmsg_free_list = skmsg->next; + WARN_ONCE(tag >= skd_max_queue_depth, "%#x > %#x (nr_requests = %lu)\n", + tag, skd_max_queue_depth, q->nr_requests); - skmsg->state = SKD_MSG_STATE_BUSY; - skmsg->id += SKD_ID_INCR; + SKD_ASSERT(skreq->state == SKD_REQ_STATE_IDLE); - /* Initialize the FIT msg header */ - fmh = (struct fit_msg_hdr *)skmsg->msg_buf; - memset(fmh, 0, sizeof(*fmh)); - fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; - skmsg->length = sizeof(*fmh); - } + dev_dbg(&skdev->pdev->dev, + "new req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", req, lba, + lba, count, count, data_dir); - skreq->fitmsg_id = skmsg->id; + skreq->id = tag + SKD_ID_RW_REQUEST; + skreq->flush_cmd = 0; + skreq->n_sg = 0; + skreq->sg_byte_count = 0; - /* - * Note that a FIT msg may have just been started - * but contains no SoFIT requests yet. - */ + skreq->fitmsg_id = 0; - /* - * Transcode the request, checking as we go. The outcome of - * the transcoding is represented by the error variable. - */ - cmd_ptr = &skmsg->msg_buf[skmsg->length]; - memset(cmd_ptr, 0, 32); + skreq->data_dir = data_dir == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE; - be_lba = cpu_to_be32(lba); - be_count = cpu_to_be32(count); - be_dmaa = cpu_to_be64((u64)skreq->sksg_dma_address); - cmdctxt = skreq->id + SKD_ID_INCR; + if (req->bio && !skd_preop_sg_list(skdev, skreq)) { + dev_dbg(&skdev->pdev->dev, "error Out\n"); + skreq->status = BLK_STS_RESOURCE; + blk_mq_complete_request(req); + return BLK_STS_OK; + } - scsi_req = cmd_ptr; - scsi_req->hdr.tag = cmdctxt; - scsi_req->hdr.sg_list_dma_address = be_dmaa; + dma_sync_single_for_device(&skdev->pdev->dev, skreq->sksg_dma_address, + skreq->n_sg * + sizeof(struct fit_sg_descriptor), + DMA_TO_DEVICE); - if (data_dir == READ) - skreq->sg_data_dir = SKD_DATA_DIR_CARD_TO_HOST; - else - skreq->sg_data_dir = SKD_DATA_DIR_HOST_TO_CARD; + /* Either a FIT msg is in progress or we have to start one. */ + if (skd_max_req_per_msg == 1) { + skmsg = NULL; + } else { + spin_lock_irqsave(&skdev->lock, flags); + skmsg = skdev->skmsg; + } + if (!skmsg) { + skmsg = &skdev->skmsg_table[tag]; + skdev->skmsg = skmsg; - if (flush == SKD_FLUSH_ZERO_SIZE_FIRST) { - skd_prep_zerosize_flush_cdb(scsi_req, skreq); - SKD_ASSERT(skreq->flush_cmd == 1); + /* Initialize the FIT msg header */ + fmh = &skmsg->msg_buf->fmh; + memset(fmh, 0, sizeof(*fmh)); + fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; + skmsg->length = sizeof(*fmh); + } else { + fmh = &skmsg->msg_buf->fmh; + } - } else { - skd_prep_rw_cdb(scsi_req, data_dir, lba, count); - } + skreq->fitmsg_id = skmsg->id; - if (fua) - scsi_req->cdb[1] |= SKD_FUA_NV; + scsi_req = &skmsg->msg_buf->scsi[fmh->num_protocol_cmds_coalesced]; + memset(scsi_req, 0, sizeof(*scsi_req)); - if (!req->bio) - goto skip_sg; + scsi_req->hdr.tag = skreq->id; + scsi_req->hdr.sg_list_dma_address = + cpu_to_be64(skreq->sksg_dma_address); - if (!skd_preop_sg_list(skdev, skreq)) { - /* - * Complete the native request with error. - * Note that the request context is still at the - * head of the free list, and that the SoFIT request - * was encoded into the FIT msg buffer but the FIT - * msg length has not been updated. In short, the - * only resource that has been allocated but might - * not be used is that the FIT msg could be empty. - */ - pr_debug("%s:%s:%d error Out\n", - skdev->name, __func__, __LINE__); - skd_end_request(skdev, skreq, BLK_STS_RESOURCE); - continue; - } + if (req_op(req) == REQ_OP_FLUSH) { + skd_prep_zerosize_flush_cdb(scsi_req, skreq); + SKD_ASSERT(skreq->flush_cmd == 1); + } else { + skd_prep_rw_cdb(scsi_req, data_dir, lba, count); + } -skip_sg: - scsi_req->hdr.sg_list_len_bytes = - cpu_to_be32(skreq->sg_byte_count); + if (req->cmd_flags & REQ_FUA) + scsi_req->cdb[1] |= SKD_FUA_NV; - /* Complete resource allocations. */ - skdev->skreq_free_list = skreq->next; - skreq->state = SKD_REQ_STATE_BUSY; - skreq->id += SKD_ID_INCR; + scsi_req->hdr.sg_list_len_bytes = cpu_to_be32(skreq->sg_byte_count); - skmsg->length += sizeof(struct skd_scsi_request); - fmh->num_protocol_cmds_coalesced++; + /* Complete resource allocations. */ + skreq->state = SKD_REQ_STATE_BUSY; - /* - * Update the active request counts. - * Capture the timeout timestamp. - */ - skreq->timeout_stamp = skdev->timeout_stamp; - timo_slot = skreq->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; - skdev->timeout_slot[timo_slot]++; - skdev->in_flight++; - pr_debug("%s:%s:%d req=0x%x busy=%d\n", - skdev->name, __func__, __LINE__, - skreq->id, skdev->in_flight); + skmsg->length += sizeof(struct skd_scsi_request); + fmh->num_protocol_cmds_coalesced++; - /* - * If the FIT msg buffer is full send it. - */ - if (skmsg->length >= SKD_N_FITMSG_BYTES || - fmh->num_protocol_cmds_coalesced >= skd_max_req_per_msg) { - skd_send_fitmsg(skdev, skmsg); - skmsg = NULL; - fmh = NULL; - } - } + dev_dbg(&skdev->pdev->dev, "req=0x%x busy=%d\n", skreq->id, + skd_in_flight(skdev)); /* - * Is a FIT msg in progress? If it is empty put the buffer back - * on the free list. If it is non-empty send what we got. - * This minimizes latency when there are fewer requests than - * what fits in a FIT msg. + * If the FIT msg buffer is full send it. */ - if (skmsg != NULL) { - /* Bigger than just a FIT msg header? */ - if (skmsg->length > sizeof(struct fit_msg_hdr)) { - pr_debug("%s:%s:%d sending msg=%p, len %d\n", - skdev->name, __func__, __LINE__, - skmsg, skmsg->length); + if (skd_max_req_per_msg == 1) { + skd_send_fitmsg(skdev, skmsg); + } else { + if (mqd->last || + fmh->num_protocol_cmds_coalesced >= skd_max_req_per_msg) { skd_send_fitmsg(skdev, skmsg); - } else { - /* - * The FIT msg is empty. It means we got started - * on the msg, but the requests were rejected. - */ - skmsg->state = SKD_MSG_STATE_IDLE; - skmsg->id += SKD_ID_INCR; - skmsg->next = skdev->skmsg_free_list; - skdev->skmsg_free_list = skmsg; + skdev->skmsg = NULL; } - skmsg = NULL; - fmh = NULL; + spin_unlock_irqrestore(&skdev->lock, flags); } - /* - * If req is non-NULL it means there is something to do but - * we are out of a resource. - */ - if (req) - blk_stop_queue(skdev->queue); + return BLK_STS_OK; } -static void skd_end_request(struct skd_device *skdev, - struct skd_request_context *skreq, blk_status_t error) +static enum blk_eh_timer_return skd_timed_out(struct request *req, + bool reserved) { - if (unlikely(error)) { - struct request *req = skreq->req; - char *cmd = (rq_data_dir(req) == READ) ? "read" : "write"; - u32 lba = (u32)blk_rq_pos(req); - u32 count = blk_rq_sectors(req); - - pr_err("(%s): Error cmd=%s sect=%u count=%u id=0x%x\n", - skd_name(skdev), cmd, lba, count, skreq->id); - } else - pr_debug("%s:%s:%d id=0x%x error=%d\n", - skdev->name, __func__, __LINE__, skreq->id, error); + struct skd_device *skdev = req->q->queuedata; + + dev_err(&skdev->pdev->dev, "request with tag %#x timed out\n", + blk_mq_unique_tag(req)); - __blk_end_request_all(skreq->req, error); + return BLK_EH_RESET_TIMER; +} + +static void skd_complete_rq(struct request *req) +{ + struct skd_request_context *skreq = blk_mq_rq_to_pdu(req); + + blk_mq_end_request(req, skreq->status); } static bool skd_preop_sg_list(struct skd_device *skdev, struct skd_request_context *skreq) { - struct request *req = skreq->req; - int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD; - int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE; - struct scatterlist *sg = &skreq->sg[0]; + struct request *req = blk_mq_rq_from_pdu(skreq); + struct scatterlist *sgl = &skreq->sg[0], *sg; int n_sg; int i; skreq->sg_byte_count = 0; - /* SKD_ASSERT(skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD || - skreq->sg_data_dir == SKD_DATA_DIR_CARD_TO_HOST); */ + WARN_ON_ONCE(skreq->data_dir != DMA_TO_DEVICE && + skreq->data_dir != DMA_FROM_DEVICE); - n_sg = blk_rq_map_sg(skdev->queue, req, sg); + n_sg = blk_rq_map_sg(skdev->queue, req, sgl); if (n_sg <= 0) return false; @@ -842,7 +633,7 @@ static bool skd_preop_sg_list(struct skd_device *skdev, * Map scatterlist to PCI bus addresses. * Note PCI might change the number of entries. */ - n_sg = pci_map_sg(skdev->pdev, sg, n_sg, pci_dir); + n_sg = pci_map_sg(skdev->pdev, sgl, n_sg, skreq->data_dir); if (n_sg <= 0) return false; @@ -850,10 +641,10 @@ static bool skd_preop_sg_list(struct skd_device *skdev, skreq->n_sg = n_sg; - for (i = 0; i < n_sg; i++) { + for_each_sg(sgl, sg, n_sg, i) { struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; - u32 cnt = sg_dma_len(&sg[i]); - uint64_t dma_addr = sg_dma_address(&sg[i]); + u32 cnt = sg_dma_len(sg); + uint64_t dma_addr = sg_dma_address(sg); sgd->control = FIT_SGD_CONTROL_NOT_LAST; sgd->byte_count = cnt; @@ -866,16 +657,16 @@ static bool skd_preop_sg_list(struct skd_device *skdev, skreq->sksg_list[n_sg - 1].control = FIT_SGD_CONTROL_LAST; if (unlikely(skdev->dbg_level > 1)) { - pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n", - skdev->name, __func__, __LINE__, - skreq->id, skreq->sksg_list, skreq->sksg_dma_address); + dev_dbg(&skdev->pdev->dev, + "skreq=%x sksg_list=%p sksg_dma=%llx\n", + skreq->id, skreq->sksg_list, skreq->sksg_dma_address); for (i = 0; i < n_sg; i++) { struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; - pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " - "addr=0x%llx next=0x%llx\n", - skdev->name, __func__, __LINE__, - i, sgd->byte_count, sgd->control, - sgd->host_side_addr, sgd->next_desc_ptr); + + dev_dbg(&skdev->pdev->dev, + " sg[%d] count=%u ctrl=0x%x addr=0x%llx next=0x%llx\n", + i, sgd->byte_count, sgd->control, + sgd->host_side_addr, sgd->next_desc_ptr); } } @@ -885,9 +676,6 @@ static bool skd_preop_sg_list(struct skd_device *skdev, static void skd_postop_sg_list(struct skd_device *skdev, struct skd_request_context *skreq) { - int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD; - int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE; - /* * restore the next ptr for next IO request so we * don't have to set it every time. @@ -895,51 +683,7 @@ static void skd_postop_sg_list(struct skd_device *skdev, skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr = skreq->sksg_dma_address + ((skreq->n_sg) * sizeof(struct fit_sg_descriptor)); - pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, pci_dir); -} - -static void skd_request_fn_not_online(struct request_queue *q) -{ - struct skd_device *skdev = q->queuedata; - int error; - - SKD_ASSERT(skdev->state != SKD_DRVR_STATE_ONLINE); - - skd_log_skdev(skdev, "req_not_online"); - switch (skdev->state) { - case SKD_DRVR_STATE_PAUSING: - case SKD_DRVR_STATE_PAUSED: - case SKD_DRVR_STATE_STARTING: - case SKD_DRVR_STATE_RESTARTING: - case SKD_DRVR_STATE_WAIT_BOOT: - /* In case of starting, we haven't started the queue, - * so we can't get here... but requests are - * possibly hanging out waiting for us because we - * reported the dev/skd0 already. They'll wait - * forever if connect doesn't complete. - * What to do??? delay dev/skd0 ?? - */ - case SKD_DRVR_STATE_BUSY: - case SKD_DRVR_STATE_BUSY_IMMINENT: - case SKD_DRVR_STATE_BUSY_ERASE: - case SKD_DRVR_STATE_DRAINING_TIMEOUT: - return; - - case SKD_DRVR_STATE_BUSY_SANITIZE: - case SKD_DRVR_STATE_STOPPING: - case SKD_DRVR_STATE_SYNCING: - case SKD_DRVR_STATE_FAULT: - case SKD_DRVR_STATE_DISAPPEARED: - default: - error = -EIO; - break; - } - - /* If we get here, terminate all pending block requeusts - * with EIO and any scsi pass thru with appropriate sense - */ - - skd_fail_all_pending(skdev); + pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, skreq->data_dir); } /* @@ -950,12 +694,22 @@ static void skd_request_fn_not_online(struct request_queue *q) static void skd_timer_tick_not_online(struct skd_device *skdev); +static void skd_start_queue(struct work_struct *work) +{ + struct skd_device *skdev = container_of(work, typeof(*skdev), + start_queue); + + /* + * Although it is safe to call blk_start_queue() from interrupt + * context, blk_mq_start_hw_queues() must not be called from + * interrupt context. + */ + blk_mq_start_hw_queues(skdev->queue); +} + static void skd_timer_tick(ulong arg) { struct skd_device *skdev = (struct skd_device *)arg; - - u32 timo_slot; - u32 overdue_timestamp; unsigned long reqflags; u32 state; @@ -972,37 +726,9 @@ static void skd_timer_tick(ulong arg) if (state != skdev->drive_state) skd_isr_fwstate(skdev); - if (skdev->state != SKD_DRVR_STATE_ONLINE) { + if (skdev->state != SKD_DRVR_STATE_ONLINE) skd_timer_tick_not_online(skdev); - goto timer_func_out; - } - skdev->timeout_stamp++; - timo_slot = skdev->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; - - /* - * All requests that happened during the previous use of - * this slot should be done by now. The previous use was - * over 7 seconds ago. - */ - if (skdev->timeout_slot[timo_slot] == 0) - goto timer_func_out; - - /* Something is overdue */ - overdue_timestamp = skdev->timeout_stamp - SKD_N_TIMEOUT_SLOT; - - pr_debug("%s:%s:%d found %d timeouts, draining busy=%d\n", - skdev->name, __func__, __LINE__, - skdev->timeout_slot[timo_slot], skdev->in_flight); - pr_err("(%s): Overdue IOs (%d), busy %d\n", - skd_name(skdev), skdev->timeout_slot[timo_slot], - skdev->in_flight); - skdev->timer_countdown = SKD_DRAINING_TIMO; - skdev->state = SKD_DRVR_STATE_DRAINING_TIMEOUT; - skdev->timo_slot = timo_slot; - blk_stop_queue(skdev->queue); - -timer_func_out: mod_timer(&skdev->timer, (jiffies + HZ)); spin_unlock_irqrestore(&skdev->lock, reqflags); @@ -1015,9 +741,9 @@ static void skd_timer_tick_not_online(struct skd_device *skdev) case SKD_DRVR_STATE_LOAD: break; case SKD_DRVR_STATE_BUSY_SANITIZE: - pr_debug("%s:%s:%d drive busy sanitize[%x], driver[%x]\n", - skdev->name, __func__, __LINE__, - skdev->drive_state, skdev->state); + dev_dbg(&skdev->pdev->dev, + "drive busy sanitize[%x], driver[%x]\n", + skdev->drive_state, skdev->state); /* If we've been in sanitize for 3 seconds, we figure we're not * going to get anymore completions, so recover requests now */ @@ -1025,22 +751,21 @@ static void skd_timer_tick_not_online(struct skd_device *skdev) skdev->timer_countdown--; return; } - skd_recover_requests(skdev, 0); + skd_recover_requests(skdev); break; case SKD_DRVR_STATE_BUSY: case SKD_DRVR_STATE_BUSY_IMMINENT: case SKD_DRVR_STATE_BUSY_ERASE: - pr_debug("%s:%s:%d busy[%x], countdown=%d\n", - skdev->name, __func__, __LINE__, - skdev->state, skdev->timer_countdown); + dev_dbg(&skdev->pdev->dev, "busy[%x], countdown=%d\n", + skdev->state, skdev->timer_countdown); if (skdev->timer_countdown > 0) { skdev->timer_countdown--; return; } - pr_debug("%s:%s:%d busy[%x], timedout=%d, restarting device.", - skdev->name, __func__, __LINE__, - skdev->state, skdev->timer_countdown); + dev_dbg(&skdev->pdev->dev, + "busy[%x], timedout=%d, restarting device.", + skdev->state, skdev->timer_countdown); skd_restart_device(skdev); break; @@ -1054,12 +779,12 @@ static void skd_timer_tick_not_online(struct skd_device *skdev) * revcover at some point. */ skdev->state = SKD_DRVR_STATE_FAULT; - pr_err("(%s): DriveFault Connect Timeout (%x)\n", - skd_name(skdev), skdev->drive_state); + dev_err(&skdev->pdev->dev, "DriveFault Connect Timeout (%x)\n", + skdev->drive_state); /*start the queue so we can respond with error to requests */ /* wakeup anyone waiting for startup complete */ - blk_start_queue(skdev->queue); + schedule_work(&skdev->start_queue); skdev->gendisk_on = -1; wake_up_interruptible(&skdev->waitq); break; @@ -1072,29 +797,6 @@ static void skd_timer_tick_not_online(struct skd_device *skdev) case SKD_DRVR_STATE_PAUSED: break; - case SKD_DRVR_STATE_DRAINING_TIMEOUT: - pr_debug("%s:%s:%d " - "draining busy [%d] tick[%d] qdb[%d] tmls[%d]\n", - skdev->name, __func__, __LINE__, - skdev->timo_slot, - skdev->timer_countdown, - skdev->in_flight, - skdev->timeout_slot[skdev->timo_slot]); - /* if the slot has cleared we can let the I/O continue */ - if (skdev->timeout_slot[skdev->timo_slot] == 0) { - pr_debug("%s:%s:%d Slot drained, starting queue.\n", - skdev->name, __func__, __LINE__); - skdev->state = SKD_DRVR_STATE_ONLINE; - blk_start_queue(skdev->queue); - return; - } - if (skdev->timer_countdown > 0) { - skdev->timer_countdown--; - return; - } - skd_restart_device(skdev); - break; - case SKD_DRVR_STATE_RESTARTING: if (skdev->timer_countdown > 0) { skdev->timer_countdown--; @@ -1103,8 +805,9 @@ static void skd_timer_tick_not_online(struct skd_device *skdev) /* For now, we fault the drive. Could attempt resets to * revcover at some point. */ skdev->state = SKD_DRVR_STATE_FAULT; - pr_err("(%s): DriveFault Reconnect Timeout (%x)\n", - skd_name(skdev), skdev->drive_state); + dev_err(&skdev->pdev->dev, + "DriveFault Reconnect Timeout (%x)\n", + skdev->drive_state); /* * Recovering does two things: @@ -1124,18 +827,18 @@ static void skd_timer_tick_not_online(struct skd_device *skdev) /* It never came out of soft reset. Try to * recover the requests and then let them * fail. This is to mitigate hung processes. */ - skd_recover_requests(skdev, 0); + skd_recover_requests(skdev); else { - pr_err("(%s): Disable BusMaster (%x)\n", - skd_name(skdev), skdev->drive_state); + dev_err(&skdev->pdev->dev, "Disable BusMaster (%x)\n", + skdev->drive_state); pci_disable_device(skdev->pdev); skd_disable_interrupts(skdev); - skd_recover_requests(skdev, 0); + skd_recover_requests(skdev); } /*start the queue so we can respond with error to requests */ /* wakeup anyone waiting for startup complete */ - blk_start_queue(skdev->queue); + schedule_work(&skdev->start_queue); skdev->gendisk_on = -1; wake_up_interruptible(&skdev->waitq); break; @@ -1154,13 +857,11 @@ static int skd_start_timer(struct skd_device *skdev) { int rc; - init_timer(&skdev->timer); setup_timer(&skdev->timer, skd_timer_tick, (ulong)skdev); rc = mod_timer(&skdev->timer, (jiffies + HZ)); if (rc) - pr_err("%s: failed to start timer %d\n", - __func__, rc); + dev_err(&skdev->pdev->dev, "failed to start timer %d\n", rc); return rc; } @@ -1171,634 +872,6 @@ static void skd_kill_timer(struct skd_device *skdev) /* ***************************************************************************** - * IOCTL - ***************************************************************************** - */ -static int skd_ioctl_sg_io(struct skd_device *skdev, - fmode_t mode, void __user *argp); -static int skd_sg_io_get_and_check_args(struct skd_device *skdev, - struct skd_sg_io *sksgio); -static int skd_sg_io_obtain_skspcl(struct skd_device *skdev, - struct skd_sg_io *sksgio); -static int skd_sg_io_prep_buffering(struct skd_device *skdev, - struct skd_sg_io *sksgio); -static int skd_sg_io_copy_buffer(struct skd_device *skdev, - struct skd_sg_io *sksgio, int dxfer_dir); -static int skd_sg_io_send_fitmsg(struct skd_device *skdev, - struct skd_sg_io *sksgio); -static int skd_sg_io_await(struct skd_device *skdev, struct skd_sg_io *sksgio); -static int skd_sg_io_release_skspcl(struct skd_device *skdev, - struct skd_sg_io *sksgio); -static int skd_sg_io_put_status(struct skd_device *skdev, - struct skd_sg_io *sksgio); - -static void skd_complete_special(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 - *skcomp, - volatile struct fit_comp_error_info *skerr, - struct skd_special_context *skspcl); - -static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode, - uint cmd_in, ulong arg) -{ - static const int sg_version_num = 30527; - int rc = 0, timeout; - struct gendisk *disk = bdev->bd_disk; - struct skd_device *skdev = disk->private_data; - int __user *p = (int __user *)arg; - - pr_debug("%s:%s:%d %s: CMD[%s] ioctl mode 0x%x, cmd 0x%x arg %0lx\n", - skdev->name, __func__, __LINE__, - disk->disk_name, current->comm, mode, cmd_in, arg); - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - switch (cmd_in) { - case SG_SET_TIMEOUT: - rc = get_user(timeout, p); - if (!rc) - disk->queue->sg_timeout = clock_t_to_jiffies(timeout); - break; - case SG_GET_TIMEOUT: - rc = jiffies_to_clock_t(disk->queue->sg_timeout); - break; - case SG_GET_VERSION_NUM: - rc = put_user(sg_version_num, p); - break; - case SG_IO: - rc = skd_ioctl_sg_io(skdev, mode, (void __user *)arg); - break; - - default: - rc = -ENOTTY; - break; - } - - pr_debug("%s:%s:%d %s: completion rc %d\n", - skdev->name, __func__, __LINE__, disk->disk_name, rc); - return rc; -} - -static int skd_ioctl_sg_io(struct skd_device *skdev, fmode_t mode, - void __user *argp) -{ - int rc; - struct skd_sg_io sksgio; - - memset(&sksgio, 0, sizeof(sksgio)); - sksgio.mode = mode; - sksgio.argp = argp; - sksgio.iov = &sksgio.no_iov_iov; - - switch (skdev->state) { - case SKD_DRVR_STATE_ONLINE: - case SKD_DRVR_STATE_BUSY_IMMINENT: - break; - - default: - pr_debug("%s:%s:%d drive not online\n", - skdev->name, __func__, __LINE__); - rc = -ENXIO; - goto out; - } - - rc = skd_sg_io_get_and_check_args(skdev, &sksgio); - if (rc) - goto out; - - rc = skd_sg_io_obtain_skspcl(skdev, &sksgio); - if (rc) - goto out; - - rc = skd_sg_io_prep_buffering(skdev, &sksgio); - if (rc) - goto out; - - rc = skd_sg_io_copy_buffer(skdev, &sksgio, SG_DXFER_TO_DEV); - if (rc) - goto out; - - rc = skd_sg_io_send_fitmsg(skdev, &sksgio); - if (rc) - goto out; - - rc = skd_sg_io_await(skdev, &sksgio); - if (rc) - goto out; - - rc = skd_sg_io_copy_buffer(skdev, &sksgio, SG_DXFER_FROM_DEV); - if (rc) - goto out; - - rc = skd_sg_io_put_status(skdev, &sksgio); - if (rc) - goto out; - - rc = 0; - -out: - skd_sg_io_release_skspcl(skdev, &sksgio); - - if (sksgio.iov != NULL && sksgio.iov != &sksgio.no_iov_iov) - kfree(sksgio.iov); - return rc; -} - -static int skd_sg_io_get_and_check_args(struct skd_device *skdev, - struct skd_sg_io *sksgio) -{ - struct sg_io_hdr *sgp = &sksgio->sg; - int i, acc; - - if (!access_ok(VERIFY_WRITE, sksgio->argp, sizeof(sg_io_hdr_t))) { - pr_debug("%s:%s:%d access sg failed %p\n", - skdev->name, __func__, __LINE__, sksgio->argp); - return -EFAULT; - } - - if (__copy_from_user(sgp, sksgio->argp, sizeof(sg_io_hdr_t))) { - pr_debug("%s:%s:%d copy_from_user sg failed %p\n", - skdev->name, __func__, __LINE__, sksgio->argp); - return -EFAULT; - } - - if (sgp->interface_id != SG_INTERFACE_ID_ORIG) { - pr_debug("%s:%s:%d interface_id invalid 0x%x\n", - skdev->name, __func__, __LINE__, sgp->interface_id); - return -EINVAL; - } - - if (sgp->cmd_len > sizeof(sksgio->cdb)) { - pr_debug("%s:%s:%d cmd_len invalid %d\n", - skdev->name, __func__, __LINE__, sgp->cmd_len); - return -EINVAL; - } - - if (sgp->iovec_count > 256) { - pr_debug("%s:%s:%d iovec_count invalid %d\n", - skdev->name, __func__, __LINE__, sgp->iovec_count); - return -EINVAL; - } - - if (sgp->dxfer_len > (PAGE_SIZE * SKD_N_SG_PER_SPECIAL)) { - pr_debug("%s:%s:%d dxfer_len invalid %d\n", - skdev->name, __func__, __LINE__, sgp->dxfer_len); - return -EINVAL; - } - - switch (sgp->dxfer_direction) { - case SG_DXFER_NONE: - acc = -1; - break; - - case SG_DXFER_TO_DEV: - acc = VERIFY_READ; - break; - - case SG_DXFER_FROM_DEV: - case SG_DXFER_TO_FROM_DEV: - acc = VERIFY_WRITE; - break; - - default: - pr_debug("%s:%s:%d dxfer_dir invalid %d\n", - skdev->name, __func__, __LINE__, sgp->dxfer_direction); - return -EINVAL; - } - - if (copy_from_user(sksgio->cdb, sgp->cmdp, sgp->cmd_len)) { - pr_debug("%s:%s:%d copy_from_user cmdp failed %p\n", - skdev->name, __func__, __LINE__, sgp->cmdp); - return -EFAULT; - } - - if (sgp->mx_sb_len != 0) { - if (!access_ok(VERIFY_WRITE, sgp->sbp, sgp->mx_sb_len)) { - pr_debug("%s:%s:%d access sbp failed %p\n", - skdev->name, __func__, __LINE__, sgp->sbp); - return -EFAULT; - } - } - - if (sgp->iovec_count == 0) { - sksgio->iov[0].iov_base = sgp->dxferp; - sksgio->iov[0].iov_len = sgp->dxfer_len; - sksgio->iovcnt = 1; - sksgio->dxfer_len = sgp->dxfer_len; - } else { - struct sg_iovec *iov; - uint nbytes = sizeof(*iov) * sgp->iovec_count; - size_t iov_data_len; - - iov = kmalloc(nbytes, GFP_KERNEL); - if (iov == NULL) { - pr_debug("%s:%s:%d alloc iovec failed %d\n", - skdev->name, __func__, __LINE__, - sgp->iovec_count); - return -ENOMEM; - } - sksgio->iov = iov; - sksgio->iovcnt = sgp->iovec_count; - - if (copy_from_user(iov, sgp->dxferp, nbytes)) { - pr_debug("%s:%s:%d copy_from_user iovec failed %p\n", - skdev->name, __func__, __LINE__, sgp->dxferp); - return -EFAULT; - } - - /* - * Sum up the vecs, making sure they don't overflow - */ - iov_data_len = 0; - for (i = 0; i < sgp->iovec_count; i++) { - if (iov_data_len + iov[i].iov_len < iov_data_len) - return -EINVAL; - iov_data_len += iov[i].iov_len; - } - - /* SG_IO howto says that the shorter of the two wins */ - if (sgp->dxfer_len < iov_data_len) { - sksgio->iovcnt = iov_shorten((struct iovec *)iov, - sgp->iovec_count, - sgp->dxfer_len); - sksgio->dxfer_len = sgp->dxfer_len; - } else - sksgio->dxfer_len = iov_data_len; - } - - if (sgp->dxfer_direction != SG_DXFER_NONE) { - struct sg_iovec *iov = sksgio->iov; - for (i = 0; i < sksgio->iovcnt; i++, iov++) { - if (!access_ok(acc, iov->iov_base, iov->iov_len)) { - pr_debug("%s:%s:%d access data failed %p/%d\n", - skdev->name, __func__, __LINE__, - iov->iov_base, (int)iov->iov_len); - return -EFAULT; - } - } - } - - return 0; -} - -static int skd_sg_io_obtain_skspcl(struct skd_device *skdev, - struct skd_sg_io *sksgio) -{ - struct skd_special_context *skspcl = NULL; - int rc; - - for (;;) { - ulong flags; - - spin_lock_irqsave(&skdev->lock, flags); - skspcl = skdev->skspcl_free_list; - if (skspcl != NULL) { - skdev->skspcl_free_list = - (struct skd_special_context *)skspcl->req.next; - skspcl->req.id += SKD_ID_INCR; - skspcl->req.state = SKD_REQ_STATE_SETUP; - skspcl->orphaned = 0; - skspcl->req.n_sg = 0; - } - spin_unlock_irqrestore(&skdev->lock, flags); - - if (skspcl != NULL) { - rc = 0; - break; - } - - pr_debug("%s:%s:%d blocking\n", - skdev->name, __func__, __LINE__); - - rc = wait_event_interruptible_timeout( - skdev->waitq, - (skdev->skspcl_free_list != NULL), - msecs_to_jiffies(sksgio->sg.timeout)); - - pr_debug("%s:%s:%d unblocking, rc=%d\n", - skdev->name, __func__, __LINE__, rc); - - if (rc <= 0) { - if (rc == 0) - rc = -ETIMEDOUT; - else - rc = -EINTR; - break; - } - /* - * If we get here rc > 0 meaning the timeout to - * wait_event_interruptible_timeout() had time left, hence the - * sought event -- non-empty free list -- happened. - * Retry the allocation. - */ - } - sksgio->skspcl = skspcl; - - return rc; -} - -static int skd_skreq_prep_buffering(struct skd_device *skdev, - struct skd_request_context *skreq, - u32 dxfer_len) -{ - u32 resid = dxfer_len; - - /* - * The DMA engine must have aligned addresses and byte counts. - */ - resid += (-resid) & 3; - skreq->sg_byte_count = resid; - - skreq->n_sg = 0; - - while (resid > 0) { - u32 nbytes = PAGE_SIZE; - u32 ix = skreq->n_sg; - struct scatterlist *sg = &skreq->sg[ix]; - struct fit_sg_descriptor *sksg = &skreq->sksg_list[ix]; - struct page *page; - - if (nbytes > resid) - nbytes = resid; - - page = alloc_page(GFP_KERNEL); - if (page == NULL) - return -ENOMEM; - - sg_set_page(sg, page, nbytes, 0); - - /* TODO: This should be going through a pci_???() - * routine to do proper mapping. */ - sksg->control = FIT_SGD_CONTROL_NOT_LAST; - sksg->byte_count = nbytes; - - sksg->host_side_addr = sg_phys(sg); - - sksg->dev_side_addr = 0; - sksg->next_desc_ptr = skreq->sksg_dma_address + - (ix + 1) * sizeof(*sksg); - - skreq->n_sg++; - resid -= nbytes; - } - - if (skreq->n_sg > 0) { - u32 ix = skreq->n_sg - 1; - struct fit_sg_descriptor *sksg = &skreq->sksg_list[ix]; - - sksg->control = FIT_SGD_CONTROL_LAST; - sksg->next_desc_ptr = 0; - } - - if (unlikely(skdev->dbg_level > 1)) { - u32 i; - - pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n", - skdev->name, __func__, __LINE__, - skreq->id, skreq->sksg_list, skreq->sksg_dma_address); - for (i = 0; i < skreq->n_sg; i++) { - struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; - - pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " - "addr=0x%llx next=0x%llx\n", - skdev->name, __func__, __LINE__, - i, sgd->byte_count, sgd->control, - sgd->host_side_addr, sgd->next_desc_ptr); - } - } - - return 0; -} - -static int skd_sg_io_prep_buffering(struct skd_device *skdev, - struct skd_sg_io *sksgio) -{ - struct skd_special_context *skspcl = sksgio->skspcl; - struct skd_request_context *skreq = &skspcl->req; - u32 dxfer_len = sksgio->dxfer_len; - int rc; - - rc = skd_skreq_prep_buffering(skdev, skreq, dxfer_len); - /* - * Eventually, errors or not, skd_release_special() is called - * to recover allocations including partial allocations. - */ - return rc; -} - -static int skd_sg_io_copy_buffer(struct skd_device *skdev, - struct skd_sg_io *sksgio, int dxfer_dir) -{ - struct skd_special_context *skspcl = sksgio->skspcl; - u32 iov_ix = 0; - struct sg_iovec curiov; - u32 sksg_ix = 0; - u8 *bufp = NULL; - u32 buf_len = 0; - u32 resid = sksgio->dxfer_len; - int rc; - - curiov.iov_len = 0; - curiov.iov_base = NULL; - - if (dxfer_dir != sksgio->sg.dxfer_direction) { - if (dxfer_dir != SG_DXFER_TO_DEV || - sksgio->sg.dxfer_direction != SG_DXFER_TO_FROM_DEV) - return 0; - } - - while (resid > 0) { - u32 nbytes = PAGE_SIZE; - - if (curiov.iov_len == 0) { - curiov = sksgio->iov[iov_ix++]; - continue; - } - - if (buf_len == 0) { - struct page *page; - page = sg_page(&skspcl->req.sg[sksg_ix++]); - bufp = page_address(page); - buf_len = PAGE_SIZE; - } - - nbytes = min_t(u32, nbytes, resid); - nbytes = min_t(u32, nbytes, curiov.iov_len); - nbytes = min_t(u32, nbytes, buf_len); - - if (dxfer_dir == SG_DXFER_TO_DEV) - rc = __copy_from_user(bufp, curiov.iov_base, nbytes); - else - rc = __copy_to_user(curiov.iov_base, bufp, nbytes); - - if (rc) - return -EFAULT; - - resid -= nbytes; - curiov.iov_len -= nbytes; - curiov.iov_base += nbytes; - buf_len -= nbytes; - } - - return 0; -} - -static int skd_sg_io_send_fitmsg(struct skd_device *skdev, - struct skd_sg_io *sksgio) -{ - struct skd_special_context *skspcl = sksgio->skspcl; - struct fit_msg_hdr *fmh = (struct fit_msg_hdr *)skspcl->msg_buf; - struct skd_scsi_request *scsi_req = (struct skd_scsi_request *)&fmh[1]; - - memset(skspcl->msg_buf, 0, SKD_N_SPECIAL_FITMSG_BYTES); - - /* Initialize the FIT msg header */ - fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; - fmh->num_protocol_cmds_coalesced = 1; - - /* Initialize the SCSI request */ - if (sksgio->sg.dxfer_direction != SG_DXFER_NONE) - scsi_req->hdr.sg_list_dma_address = - cpu_to_be64(skspcl->req.sksg_dma_address); - scsi_req->hdr.tag = skspcl->req.id; - scsi_req->hdr.sg_list_len_bytes = - cpu_to_be32(skspcl->req.sg_byte_count); - memcpy(scsi_req->cdb, sksgio->cdb, sizeof(scsi_req->cdb)); - - skspcl->req.state = SKD_REQ_STATE_BUSY; - skd_send_special_fitmsg(skdev, skspcl); - - return 0; -} - -static int skd_sg_io_await(struct skd_device *skdev, struct skd_sg_io *sksgio) -{ - unsigned long flags; - int rc; - - rc = wait_event_interruptible_timeout(skdev->waitq, - (sksgio->skspcl->req.state != - SKD_REQ_STATE_BUSY), - msecs_to_jiffies(sksgio->sg. - timeout)); - - spin_lock_irqsave(&skdev->lock, flags); - - if (sksgio->skspcl->req.state == SKD_REQ_STATE_ABORTED) { - pr_debug("%s:%s:%d skspcl %p aborted\n", - skdev->name, __func__, __LINE__, sksgio->skspcl); - - /* Build check cond, sense and let command finish. */ - /* For a timeout, we must fabricate completion and sense - * data to complete the command */ - sksgio->skspcl->req.completion.status = - SAM_STAT_CHECK_CONDITION; - - memset(&sksgio->skspcl->req.err_info, 0, - sizeof(sksgio->skspcl->req.err_info)); - sksgio->skspcl->req.err_info.type = 0x70; - sksgio->skspcl->req.err_info.key = ABORTED_COMMAND; - sksgio->skspcl->req.err_info.code = 0x44; - sksgio->skspcl->req.err_info.qual = 0; - rc = 0; - } else if (sksgio->skspcl->req.state != SKD_REQ_STATE_BUSY) - /* No longer on the adapter. We finish. */ - rc = 0; - else { - /* Something's gone wrong. Still busy. Timeout or - * user interrupted (control-C). Mark as an orphan - * so it will be disposed when completed. */ - sksgio->skspcl->orphaned = 1; - sksgio->skspcl = NULL; - if (rc == 0) { - pr_debug("%s:%s:%d timed out %p (%u ms)\n", - skdev->name, __func__, __LINE__, - sksgio, sksgio->sg.timeout); - rc = -ETIMEDOUT; - } else { - pr_debug("%s:%s:%d cntlc %p\n", - skdev->name, __func__, __LINE__, sksgio); - rc = -EINTR; - } - } - - spin_unlock_irqrestore(&skdev->lock, flags); - - return rc; -} - -static int skd_sg_io_put_status(struct skd_device *skdev, - struct skd_sg_io *sksgio) -{ - struct sg_io_hdr *sgp = &sksgio->sg; - struct skd_special_context *skspcl = sksgio->skspcl; - int resid = 0; - - u32 nb = be32_to_cpu(skspcl->req.completion.num_returned_bytes); - - sgp->status = skspcl->req.completion.status; - resid = sksgio->dxfer_len - nb; - - sgp->masked_status = sgp->status & STATUS_MASK; - sgp->msg_status = 0; - sgp->host_status = 0; - sgp->driver_status = 0; - sgp->resid = resid; - if (sgp->masked_status || sgp->host_status || sgp->driver_status) - sgp->info |= SG_INFO_CHECK; - - pr_debug("%s:%s:%d status %x masked %x resid 0x%x\n", - skdev->name, __func__, __LINE__, - sgp->status, sgp->masked_status, sgp->resid); - - if (sgp->masked_status == SAM_STAT_CHECK_CONDITION) { - if (sgp->mx_sb_len > 0) { - struct fit_comp_error_info *ei = &skspcl->req.err_info; - u32 nbytes = sizeof(*ei); - - nbytes = min_t(u32, nbytes, sgp->mx_sb_len); - - sgp->sb_len_wr = nbytes; - - if (__copy_to_user(sgp->sbp, ei, nbytes)) { - pr_debug("%s:%s:%d copy_to_user sense failed %p\n", - skdev->name, __func__, __LINE__, - sgp->sbp); - return -EFAULT; - } - } - } - - if (__copy_to_user(sksgio->argp, sgp, sizeof(sg_io_hdr_t))) { - pr_debug("%s:%s:%d copy_to_user sg failed %p\n", - skdev->name, __func__, __LINE__, sksgio->argp); - return -EFAULT; - } - - return 0; -} - -static int skd_sg_io_release_skspcl(struct skd_device *skdev, - struct skd_sg_io *sksgio) -{ - struct skd_special_context *skspcl = sksgio->skspcl; - - if (skspcl != NULL) { - ulong flags; - - sksgio->skspcl = NULL; - - spin_lock_irqsave(&skdev->lock, flags); - skd_release_special(skdev, skspcl); - spin_unlock_irqrestore(&skdev->lock, flags); - } - - return 0; -} - -/* - ***************************************************************************** * INTERNAL REQUESTS -- generated by driver itself ***************************************************************************** */ @@ -1811,14 +884,15 @@ static int skd_format_internal_skspcl(struct skd_device *skdev) uint64_t dma_address; struct skd_scsi_request *scsi; - fmh = (struct fit_msg_hdr *)&skspcl->msg_buf[0]; + fmh = &skspcl->msg_buf->fmh; fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; fmh->num_protocol_cmds_coalesced = 1; - scsi = (struct skd_scsi_request *)&skspcl->msg_buf[64]; + scsi = &skspcl->msg_buf->scsi[0]; memset(scsi, 0, sizeof(*scsi)); dma_address = skspcl->req.sksg_dma_address; scsi->hdr.sg_list_dma_address = cpu_to_be64(dma_address); + skspcl->req.n_sg = 1; sgd->control = FIT_SGD_CONTROL_LAST; sgd->byte_count = 0; sgd->host_side_addr = skspcl->db_dma_address; @@ -1846,11 +920,9 @@ static void skd_send_internal_skspcl(struct skd_device *skdev, */ return; - SKD_ASSERT((skspcl->req.id & SKD_ID_INCR) == 0); skspcl->req.state = SKD_REQ_STATE_BUSY; - skspcl->req.id += SKD_ID_INCR; - scsi = (struct skd_scsi_request *)&skspcl->msg_buf[64]; + scsi = &skspcl->msg_buf->scsi[0]; scsi->hdr.tag = skspcl->req.id; memset(scsi->cdb, 0, sizeof(scsi->cdb)); @@ -1940,32 +1012,35 @@ static void skd_log_check_status(struct skd_device *skdev, u8 status, u8 key, /* If the check condition is of special interest, log a message */ if ((status == SAM_STAT_CHECK_CONDITION) && (key == 0x02) && (code == 0x04) && (qual == 0x06)) { - pr_err("(%s): *** LOST_WRITE_DATA ERROR *** key/asc/" - "ascq/fruc %02x/%02x/%02x/%02x\n", - skd_name(skdev), key, code, qual, fruc); + dev_err(&skdev->pdev->dev, + "*** LOST_WRITE_DATA ERROR *** key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", + key, code, qual, fruc); } } static void skd_complete_internal(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 - *skcomp, - volatile struct fit_comp_error_info *skerr, + struct fit_completion_entry_v1 *skcomp, + struct fit_comp_error_info *skerr, struct skd_special_context *skspcl) { u8 *buf = skspcl->data_buf; u8 status; int i; - struct skd_scsi_request *scsi = - (struct skd_scsi_request *)&skspcl->msg_buf[64]; + struct skd_scsi_request *scsi = &skspcl->msg_buf->scsi[0]; + + lockdep_assert_held(&skdev->lock); SKD_ASSERT(skspcl == &skdev->internal_skspcl); - pr_debug("%s:%s:%d complete internal %x\n", - skdev->name, __func__, __LINE__, scsi->cdb[0]); + dev_dbg(&skdev->pdev->dev, "complete internal %x\n", scsi->cdb[0]); + + dma_sync_single_for_cpu(&skdev->pdev->dev, + skspcl->db_dma_address, + skspcl->req.sksg_list[0].byte_count, + DMA_BIDIRECTIONAL); skspcl->req.completion = *skcomp; skspcl->req.state = SKD_REQ_STATE_IDLE; - skspcl->req.id += SKD_ID_INCR; status = skspcl->req.completion.status; @@ -1981,14 +1056,15 @@ static void skd_complete_internal(struct skd_device *skdev, skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); else { if (skdev->state == SKD_DRVR_STATE_STOPPING) { - pr_debug("%s:%s:%d TUR failed, don't send anymore state 0x%x\n", - skdev->name, __func__, __LINE__, - skdev->state); + dev_dbg(&skdev->pdev->dev, + "TUR failed, don't send anymore state 0x%x\n", + skdev->state); return; } - pr_debug("%s:%s:%d **** TUR failed, retry skerr\n", - skdev->name, __func__, __LINE__); - skd_send_internal_skspcl(skdev, skspcl, 0x00); + dev_dbg(&skdev->pdev->dev, + "**** TUR failed, retry skerr\n"); + skd_send_internal_skspcl(skdev, skspcl, + TEST_UNIT_READY); } break; @@ -1997,14 +1073,15 @@ static void skd_complete_internal(struct skd_device *skdev, skd_send_internal_skspcl(skdev, skspcl, READ_BUFFER); else { if (skdev->state == SKD_DRVR_STATE_STOPPING) { - pr_debug("%s:%s:%d write buffer failed, don't send anymore state 0x%x\n", - skdev->name, __func__, __LINE__, - skdev->state); + dev_dbg(&skdev->pdev->dev, + "write buffer failed, don't send anymore state 0x%x\n", + skdev->state); return; } - pr_debug("%s:%s:%d **** write buffer failed, retry skerr\n", - skdev->name, __func__, __LINE__); - skd_send_internal_skspcl(skdev, skspcl, 0x00); + dev_dbg(&skdev->pdev->dev, + "**** write buffer failed, retry skerr\n"); + skd_send_internal_skspcl(skdev, skspcl, + TEST_UNIT_READY); } break; @@ -2014,33 +1091,31 @@ static void skd_complete_internal(struct skd_device *skdev, skd_send_internal_skspcl(skdev, skspcl, READ_CAPACITY); else { - pr_err( - "(%s):*** W/R Buffer mismatch %d ***\n", - skd_name(skdev), skdev->connect_retries); + dev_err(&skdev->pdev->dev, + "*** W/R Buffer mismatch %d ***\n", + skdev->connect_retries); if (skdev->connect_retries < SKD_MAX_CONNECT_RETRIES) { skdev->connect_retries++; skd_soft_reset(skdev); } else { - pr_err( - "(%s): W/R Buffer Connect Error\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, + "W/R Buffer Connect Error\n"); return; } } } else { if (skdev->state == SKD_DRVR_STATE_STOPPING) { - pr_debug("%s:%s:%d " - "read buffer failed, don't send anymore state 0x%x\n", - skdev->name, __func__, __LINE__, - skdev->state); + dev_dbg(&skdev->pdev->dev, + "read buffer failed, don't send anymore state 0x%x\n", + skdev->state); return; } - pr_debug("%s:%s:%d " - "**** read buffer failed, retry skerr\n", - skdev->name, __func__, __LINE__); - skd_send_internal_skspcl(skdev, skspcl, 0x00); + dev_dbg(&skdev->pdev->dev, + "**** read buffer failed, retry skerr\n"); + skd_send_internal_skspcl(skdev, skspcl, + TEST_UNIT_READY); } break; @@ -2054,10 +1129,9 @@ static void skd_complete_internal(struct skd_device *skdev, (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; - pr_debug("%s:%s:%d last lba %d, bs %d\n", - skdev->name, __func__, __LINE__, - skdev->read_cap_last_lba, - skdev->read_cap_blocksize); + dev_dbg(&skdev->pdev->dev, "last lba %d, bs %d\n", + skdev->read_cap_last_lba, + skdev->read_cap_blocksize); set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); @@ -2068,13 +1142,10 @@ static void skd_complete_internal(struct skd_device *skdev, (skerr->key == MEDIUM_ERROR)) { skdev->read_cap_last_lba = ~0; set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); - pr_debug("%s:%s:%d " - "**** MEDIUM ERROR caused READCAP to fail, ignore failure and continue to inquiry\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "**** MEDIUM ERROR caused READCAP to fail, ignore failure and continue to inquiry\n"); skd_send_internal_skspcl(skdev, skspcl, INQUIRY); } else { - pr_debug("%s:%s:%d **** READCAP failed, retry TUR\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "**** READCAP failed, retry TUR\n"); skd_send_internal_skspcl(skdev, skspcl, TEST_UNIT_READY); } @@ -2091,8 +1162,7 @@ static void skd_complete_internal(struct skd_device *skdev, } if (skd_unquiesce_dev(skdev) < 0) - pr_debug("%s:%s:%d **** failed, to ONLINE device\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "**** failed, to ONLINE device\n"); /* connection is complete */ skdev->connect_retries = 0; break; @@ -2120,27 +1190,20 @@ static void skd_send_fitmsg(struct skd_device *skdev, struct skd_fitmsg_context *skmsg) { u64 qcmd; - struct fit_msg_hdr *fmh; - pr_debug("%s:%s:%d dma address 0x%llx, busy=%d\n", - skdev->name, __func__, __LINE__, - skmsg->mb_dma_address, skdev->in_flight); - pr_debug("%s:%s:%d msg_buf 0x%p, offset %x\n", - skdev->name, __func__, __LINE__, - skmsg->msg_buf, skmsg->offset); + dev_dbg(&skdev->pdev->dev, "dma address 0x%llx, busy=%d\n", + skmsg->mb_dma_address, skd_in_flight(skdev)); + dev_dbg(&skdev->pdev->dev, "msg_buf %p\n", skmsg->msg_buf); qcmd = skmsg->mb_dma_address; qcmd |= FIT_QCMD_QID_NORMAL; - fmh = (struct fit_msg_hdr *)skmsg->msg_buf; - skmsg->outstanding = fmh->num_protocol_cmds_coalesced; - if (unlikely(skdev->dbg_level > 1)) { u8 *bp = (u8 *)skmsg->msg_buf; int i; for (i = 0; i < skmsg->length; i += 8) { - pr_debug("%s:%s:%d msg[%2d] %8ph\n", - skdev->name, __func__, __LINE__, i, &bp[i]); + dev_dbg(&skdev->pdev->dev, "msg[%2d] %8ph\n", i, + &bp[i]); if (i == 0) i = 64 - 8; } @@ -2160,6 +1223,12 @@ static void skd_send_fitmsg(struct skd_device *skdev, */ qcmd |= FIT_QCMD_MSGSIZE_64; + dma_sync_single_for_device(&skdev->pdev->dev, skmsg->mb_dma_address, + skmsg->length, DMA_TO_DEVICE); + + /* Make sure skd_msg_buf is written before the doorbell is triggered. */ + smp_wmb(); + SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); } @@ -2168,30 +1237,31 @@ static void skd_send_special_fitmsg(struct skd_device *skdev, { u64 qcmd; + WARN_ON_ONCE(skspcl->req.n_sg != 1); + if (unlikely(skdev->dbg_level > 1)) { u8 *bp = (u8 *)skspcl->msg_buf; int i; for (i = 0; i < SKD_N_SPECIAL_FITMSG_BYTES; i += 8) { - pr_debug("%s:%s:%d spcl[%2d] %8ph\n", - skdev->name, __func__, __LINE__, i, &bp[i]); + dev_dbg(&skdev->pdev->dev, " spcl[%2d] %8ph\n", i, + &bp[i]); if (i == 0) i = 64 - 8; } - pr_debug("%s:%s:%d skspcl=%p id=%04x sksg_list=%p sksg_dma=%llx\n", - skdev->name, __func__, __LINE__, - skspcl, skspcl->req.id, skspcl->req.sksg_list, - skspcl->req.sksg_dma_address); + dev_dbg(&skdev->pdev->dev, + "skspcl=%p id=%04x sksg_list=%p sksg_dma=%llx\n", + skspcl, skspcl->req.id, skspcl->req.sksg_list, + skspcl->req.sksg_dma_address); for (i = 0; i < skspcl->req.n_sg; i++) { struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[i]; - pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x " - "addr=0x%llx next=0x%llx\n", - skdev->name, __func__, __LINE__, - i, sgd->byte_count, sgd->control, - sgd->host_side_addr, sgd->next_desc_ptr); + dev_dbg(&skdev->pdev->dev, + " sg[%d] count=%u ctrl=0x%x addr=0x%llx next=0x%llx\n", + i, sgd->byte_count, sgd->control, + sgd->host_side_addr, sgd->next_desc_ptr); } } @@ -2202,6 +1272,20 @@ static void skd_send_special_fitmsg(struct skd_device *skdev, qcmd = skspcl->mb_dma_address; qcmd |= FIT_QCMD_QID_NORMAL + FIT_QCMD_MSGSIZE_128; + dma_sync_single_for_device(&skdev->pdev->dev, skspcl->mb_dma_address, + SKD_N_SPECIAL_FITMSG_BYTES, DMA_TO_DEVICE); + dma_sync_single_for_device(&skdev->pdev->dev, + skspcl->req.sksg_dma_address, + 1 * sizeof(struct fit_sg_descriptor), + DMA_TO_DEVICE); + dma_sync_single_for_device(&skdev->pdev->dev, + skspcl->db_dma_address, + skspcl->req.sksg_list[0].byte_count, + DMA_BIDIRECTIONAL); + + /* Make sure skd_msg_buf is written before the doorbell is triggered. */ + smp_wmb(); + SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); } @@ -2212,8 +1296,8 @@ static void skd_send_special_fitmsg(struct skd_device *skdev, */ static void skd_complete_other(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 *skcomp, - volatile struct fit_comp_error_info *skerr); + struct fit_completion_entry_v1 *skcomp, + struct fit_comp_error_info *skerr); struct sns_info { u8 type; @@ -2262,21 +1346,20 @@ static struct sns_info skd_chkstat_table[] = { static enum skd_check_status_action skd_check_status(struct skd_device *skdev, - u8 cmp_status, volatile struct fit_comp_error_info *skerr) + u8 cmp_status, struct fit_comp_error_info *skerr) { - int i, n; + int i; - pr_err("(%s): key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", - skd_name(skdev), skerr->key, skerr->code, skerr->qual, - skerr->fruc); + dev_err(&skdev->pdev->dev, "key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", + skerr->key, skerr->code, skerr->qual, skerr->fruc); - pr_debug("%s:%s:%d stat: t=%02x stat=%02x k=%02x c=%02x q=%02x fruc=%02x\n", - skdev->name, __func__, __LINE__, skerr->type, cmp_status, - skerr->key, skerr->code, skerr->qual, skerr->fruc); + dev_dbg(&skdev->pdev->dev, + "stat: t=%02x stat=%02x k=%02x c=%02x q=%02x fruc=%02x\n", + skerr->type, cmp_status, skerr->key, skerr->code, skerr->qual, + skerr->fruc); /* Does the info match an entry in the good category? */ - n = sizeof(skd_chkstat_table) / sizeof(skd_chkstat_table[0]); - for (i = 0; i < n; i++) { + for (i = 0; i < ARRAY_SIZE(skd_chkstat_table); i++) { struct sns_info *sns = &skd_chkstat_table[i]; if (sns->mask & 0x10) @@ -2300,10 +1383,9 @@ skd_check_status(struct skd_device *skdev, continue; if (sns->action == SKD_CHECK_STATUS_REPORT_SMART_ALERT) { - pr_err("(%s): SMART Alert: sense key/asc/ascq " - "%02x/%02x/%02x\n", - skd_name(skdev), skerr->key, - skerr->code, skerr->qual); + dev_err(&skdev->pdev->dev, + "SMART Alert: sense key/asc/ascq %02x/%02x/%02x\n", + skerr->key, skerr->code, skerr->qual); } return sns->action; } @@ -2312,335 +1394,80 @@ skd_check_status(struct skd_device *skdev, * zero status means good */ if (cmp_status) { - pr_debug("%s:%s:%d status check: error\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "status check: error\n"); return SKD_CHECK_STATUS_REPORT_ERROR; } - pr_debug("%s:%s:%d status check good default\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "status check good default\n"); return SKD_CHECK_STATUS_REPORT_GOOD; } static void skd_resolve_req_exception(struct skd_device *skdev, - struct skd_request_context *skreq) + struct skd_request_context *skreq, + struct request *req) { u8 cmp_status = skreq->completion.status; switch (skd_check_status(skdev, cmp_status, &skreq->err_info)) { case SKD_CHECK_STATUS_REPORT_GOOD: case SKD_CHECK_STATUS_REPORT_SMART_ALERT: - skd_end_request(skdev, skreq, BLK_STS_OK); + skreq->status = BLK_STS_OK; + blk_mq_complete_request(req); break; case SKD_CHECK_STATUS_BUSY_IMMINENT: skd_log_skreq(skdev, skreq, "retry(busy)"); - blk_requeue_request(skdev->queue, skreq->req); - pr_info("(%s) drive BUSY imminent\n", skd_name(skdev)); + blk_requeue_request(skdev->queue, req); + dev_info(&skdev->pdev->dev, "drive BUSY imminent\n"); skdev->state = SKD_DRVR_STATE_BUSY_IMMINENT; skdev->timer_countdown = SKD_TIMER_MINUTES(20); skd_quiesce_dev(skdev); break; case SKD_CHECK_STATUS_REQUEUE_REQUEST: - if ((unsigned long) ++skreq->req->special < SKD_MAX_RETRIES) { + if ((unsigned long) ++req->special < SKD_MAX_RETRIES) { skd_log_skreq(skdev, skreq, "retry"); - blk_requeue_request(skdev->queue, skreq->req); + blk_requeue_request(skdev->queue, req); break; } - /* fall through to report error */ + /* fall through */ case SKD_CHECK_STATUS_REPORT_ERROR: default: - skd_end_request(skdev, skreq, BLK_STS_IOERR); + skreq->status = BLK_STS_IOERR; + blk_mq_complete_request(req); break; } } -/* assume spinlock is already held */ static void skd_release_skreq(struct skd_device *skdev, struct skd_request_context *skreq) { - u32 msg_slot; - struct skd_fitmsg_context *skmsg; - - u32 timo_slot; - - /* - * Reclaim the FIT msg buffer if this is - * the first of the requests it carried to - * be completed. The FIT msg buffer used to - * send this request cannot be reused until - * we are sure the s1120 card has copied - * it to its memory. The FIT msg might have - * contained several requests. As soon as - * any of them are completed we know that - * the entire FIT msg was transferred. - * Only the first completed request will - * match the FIT msg buffer id. The FIT - * msg buffer id is immediately updated. - * When subsequent requests complete the FIT - * msg buffer id won't match, so we know - * quite cheaply that it is already done. - */ - msg_slot = skreq->fitmsg_id & SKD_ID_SLOT_MASK; - SKD_ASSERT(msg_slot < skdev->num_fitmsg_context); - - skmsg = &skdev->skmsg_table[msg_slot]; - if (skmsg->id == skreq->fitmsg_id) { - SKD_ASSERT(skmsg->state == SKD_MSG_STATE_BUSY); - SKD_ASSERT(skmsg->outstanding > 0); - skmsg->outstanding--; - if (skmsg->outstanding == 0) { - skmsg->state = SKD_MSG_STATE_IDLE; - skmsg->id += SKD_ID_INCR; - skmsg->next = skdev->skmsg_free_list; - skdev->skmsg_free_list = skmsg; - } - } - - /* - * Decrease the number of active requests. - * Also decrements the count in the timeout slot. - */ - SKD_ASSERT(skdev->in_flight > 0); - skdev->in_flight -= 1; - - timo_slot = skreq->timeout_stamp & SKD_TIMEOUT_SLOT_MASK; - SKD_ASSERT(skdev->timeout_slot[timo_slot] > 0); - skdev->timeout_slot[timo_slot] -= 1; - - /* - * Reset backpointer - */ - skreq->req = NULL; - /* * Reclaim the skd_request_context */ skreq->state = SKD_REQ_STATE_IDLE; - skreq->id += SKD_ID_INCR; - skreq->next = skdev->skreq_free_list; - skdev->skreq_free_list = skreq; } -#define DRIVER_INQ_EVPD_PAGE_CODE 0xDA - -static void skd_do_inq_page_00(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 *skcomp, - volatile struct fit_comp_error_info *skerr, - uint8_t *cdb, uint8_t *buf) -{ - uint16_t insert_pt, max_bytes, drive_pages, drive_bytes, new_size; - - /* Caller requested "supported pages". The driver needs to insert - * its page. - */ - pr_debug("%s:%s:%d skd_do_driver_inquiry: modify supported pages.\n", - skdev->name, __func__, __LINE__); - - /* If the device rejected the request because the CDB was - * improperly formed, then just leave. - */ - if (skcomp->status == SAM_STAT_CHECK_CONDITION && - skerr->key == ILLEGAL_REQUEST && skerr->code == 0x24) - return; - - /* Get the amount of space the caller allocated */ - max_bytes = (cdb[3] << 8) | cdb[4]; - - /* Get the number of pages actually returned by the device */ - drive_pages = (buf[2] << 8) | buf[3]; - drive_bytes = drive_pages + 4; - new_size = drive_pages + 1; - - /* Supported pages must be in numerical order, so find where - * the driver page needs to be inserted into the list of - * pages returned by the device. - */ - for (insert_pt = 4; insert_pt < drive_bytes; insert_pt++) { - if (buf[insert_pt] == DRIVER_INQ_EVPD_PAGE_CODE) - return; /* Device using this page code. abort */ - else if (buf[insert_pt] > DRIVER_INQ_EVPD_PAGE_CODE) - break; - } - - if (insert_pt < max_bytes) { - uint16_t u; - - /* Shift everything up one byte to make room. */ - for (u = new_size + 3; u > insert_pt; u--) - buf[u] = buf[u - 1]; - buf[insert_pt] = DRIVER_INQ_EVPD_PAGE_CODE; - - /* SCSI byte order increment of num_returned_bytes by 1 */ - skcomp->num_returned_bytes = - be32_to_cpu(skcomp->num_returned_bytes) + 1; - skcomp->num_returned_bytes = - be32_to_cpu(skcomp->num_returned_bytes); - } - - /* update page length field to reflect the driver's page too */ - buf[2] = (uint8_t)((new_size >> 8) & 0xFF); - buf[3] = (uint8_t)((new_size >> 0) & 0xFF); -} - -static void skd_get_link_info(struct pci_dev *pdev, u8 *speed, u8 *width) -{ - int pcie_reg; - u16 pci_bus_speed; - u8 pci_lanes; - - pcie_reg = pci_find_capability(pdev, PCI_CAP_ID_EXP); - if (pcie_reg) { - u16 linksta; - pci_read_config_word(pdev, pcie_reg + PCI_EXP_LNKSTA, &linksta); - - pci_bus_speed = linksta & 0xF; - pci_lanes = (linksta & 0x3F0) >> 4; - } else { - *speed = STEC_LINK_UNKNOWN; - *width = 0xFF; - return; - } - - switch (pci_bus_speed) { - case 1: - *speed = STEC_LINK_2_5GTS; - break; - case 2: - *speed = STEC_LINK_5GTS; - break; - case 3: - *speed = STEC_LINK_8GTS; - break; - default: - *speed = STEC_LINK_UNKNOWN; - break; - } - - if (pci_lanes <= 0x20) - *width = pci_lanes; - else - *width = 0xFF; -} - -static void skd_do_inq_page_da(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 *skcomp, - volatile struct fit_comp_error_info *skerr, - uint8_t *cdb, uint8_t *buf) -{ - struct pci_dev *pdev = skdev->pdev; - unsigned max_bytes; - struct driver_inquiry_data inq; - u16 val; - - pr_debug("%s:%s:%d skd_do_driver_inquiry: return driver page\n", - skdev->name, __func__, __LINE__); - - memset(&inq, 0, sizeof(inq)); - - inq.page_code = DRIVER_INQ_EVPD_PAGE_CODE; - - skd_get_link_info(pdev, &inq.pcie_link_speed, &inq.pcie_link_lanes); - inq.pcie_bus_number = cpu_to_be16(pdev->bus->number); - inq.pcie_device_number = PCI_SLOT(pdev->devfn); - inq.pcie_function_number = PCI_FUNC(pdev->devfn); - - pci_read_config_word(pdev, PCI_VENDOR_ID, &val); - inq.pcie_vendor_id = cpu_to_be16(val); - - pci_read_config_word(pdev, PCI_DEVICE_ID, &val); - inq.pcie_device_id = cpu_to_be16(val); - - pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &val); - inq.pcie_subsystem_vendor_id = cpu_to_be16(val); - - pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &val); - inq.pcie_subsystem_device_id = cpu_to_be16(val); - - /* Driver version, fixed lenth, padded with spaces on the right */ - inq.driver_version_length = sizeof(inq.driver_version); - memset(&inq.driver_version, ' ', sizeof(inq.driver_version)); - memcpy(inq.driver_version, DRV_VER_COMPL, - min(sizeof(inq.driver_version), strlen(DRV_VER_COMPL))); - - inq.page_length = cpu_to_be16((sizeof(inq) - 4)); - - /* Clear the error set by the device */ - skcomp->status = SAM_STAT_GOOD; - memset((void *)skerr, 0, sizeof(*skerr)); - - /* copy response into output buffer */ - max_bytes = (cdb[3] << 8) | cdb[4]; - memcpy(buf, &inq, min_t(unsigned, max_bytes, sizeof(inq))); - - skcomp->num_returned_bytes = - be32_to_cpu(min_t(uint16_t, max_bytes, sizeof(inq))); -} - -static void skd_do_driver_inq(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 *skcomp, - volatile struct fit_comp_error_info *skerr, - uint8_t *cdb, uint8_t *buf) -{ - if (!buf) - return; - else if (cdb[0] != INQUIRY) - return; /* Not an INQUIRY */ - else if ((cdb[1] & 1) == 0) - return; /* EVPD not set */ - else if (cdb[2] == 0) - /* Need to add driver's page to supported pages list */ - skd_do_inq_page_00(skdev, skcomp, skerr, cdb, buf); - else if (cdb[2] == DRIVER_INQ_EVPD_PAGE_CODE) - /* Caller requested driver's page */ - skd_do_inq_page_da(skdev, skcomp, skerr, cdb, buf); -} - -static unsigned char *skd_sg_1st_page_ptr(struct scatterlist *sg) -{ - if (!sg) - return NULL; - if (!sg_page(sg)) - return NULL; - return sg_virt(sg); -} - -static void skd_process_scsi_inq(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 - *skcomp, - volatile struct fit_comp_error_info *skerr, - struct skd_special_context *skspcl) -{ - uint8_t *buf; - struct fit_msg_hdr *fmh = (struct fit_msg_hdr *)skspcl->msg_buf; - struct skd_scsi_request *scsi_req = (struct skd_scsi_request *)&fmh[1]; - - dma_sync_sg_for_cpu(skdev->class_dev, skspcl->req.sg, skspcl->req.n_sg, - skspcl->req.sg_data_dir); - buf = skd_sg_1st_page_ptr(skspcl->req.sg); - - if (buf) - skd_do_driver_inq(skdev, skcomp, skerr, scsi_req->cdb, buf); -} - - static int skd_isr_completion_posted(struct skd_device *skdev, int limit, int *enqueued) { - volatile struct fit_completion_entry_v1 *skcmp = NULL; - volatile struct fit_comp_error_info *skerr; + struct fit_completion_entry_v1 *skcmp; + struct fit_comp_error_info *skerr; u16 req_id; - u32 req_slot; + u32 tag; + u16 hwq = 0; + struct request *rq; struct skd_request_context *skreq; - u16 cmp_cntxt = 0; - u8 cmp_status = 0; - u8 cmp_cycle = 0; - u32 cmp_bytes = 0; + u16 cmp_cntxt; + u8 cmp_status; + u8 cmp_cycle; + u32 cmp_bytes; int rc = 0; int processed = 0; + lockdep_assert_held(&skdev->lock); + for (;; ) { SKD_ASSERT(skdev->skcomp_ix < SKD_N_COMPLETION_ENTRY); @@ -2652,16 +1479,14 @@ static int skd_isr_completion_posted(struct skd_device *skdev, skerr = &skdev->skerr_table[skdev->skcomp_ix]; - pr_debug("%s:%s:%d " - "cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d " - "busy=%d rbytes=0x%x proto=%d\n", - skdev->name, __func__, __LINE__, skdev->skcomp_cycle, - skdev->skcomp_ix, cmp_cycle, cmp_cntxt, cmp_status, - skdev->in_flight, cmp_bytes, skdev->proto_ver); + dev_dbg(&skdev->pdev->dev, + "cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d busy=%d rbytes=0x%x proto=%d\n", + skdev->skcomp_cycle, skdev->skcomp_ix, cmp_cycle, + cmp_cntxt, cmp_status, skd_in_flight(skdev), + cmp_bytes, skdev->proto_ver); if (cmp_cycle != skdev->skcomp_cycle) { - pr_debug("%s:%s:%d end of completions\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "end of completions\n"); break; } /* @@ -2680,49 +1505,38 @@ static int skd_isr_completion_posted(struct skd_device *skdev, * r/w request (see skd_start() above) or a special request. */ req_id = cmp_cntxt; - req_slot = req_id & SKD_ID_SLOT_AND_TABLE_MASK; + tag = req_id & SKD_ID_SLOT_AND_TABLE_MASK; /* Is this other than a r/w request? */ - if (req_slot >= skdev->num_req_context) { + if (tag >= skdev->num_req_context) { /* * This is not a completion for a r/w request. */ + WARN_ON_ONCE(blk_mq_tag_to_rq(skdev->tag_set.tags[hwq], + tag)); skd_complete_other(skdev, skcmp, skerr); continue; } - skreq = &skdev->skreq_table[req_slot]; + rq = blk_mq_tag_to_rq(skdev->tag_set.tags[hwq], tag); + if (WARN(!rq, "No request for tag %#x -> %#x\n", cmp_cntxt, + tag)) + continue; + skreq = blk_mq_rq_to_pdu(rq); /* * Make sure the request ID for the slot matches. */ if (skreq->id != req_id) { - pr_debug("%s:%s:%d mismatch comp_id=0x%x req_id=0x%x\n", - skdev->name, __func__, __LINE__, - req_id, skreq->id); - { - u16 new_id = cmp_cntxt; - pr_err("(%s): Completion mismatch " - "comp_id=0x%04x skreq=0x%04x new=0x%04x\n", - skd_name(skdev), req_id, - skreq->id, new_id); + dev_err(&skdev->pdev->dev, + "Completion mismatch comp_id=0x%04x skreq=0x%04x new=0x%04x\n", + req_id, skreq->id, cmp_cntxt); - continue; - } + continue; } SKD_ASSERT(skreq->state == SKD_REQ_STATE_BUSY); - if (skreq->state == SKD_REQ_STATE_ABORTED) { - pr_debug("%s:%s:%d reclaim req %p id=%04x\n", - skdev->name, __func__, __LINE__, - skreq, skreq->id); - /* a previously timed out command can - * now be cleaned up */ - skd_release_skreq(skdev, skreq); - continue; - } - skreq->completion = *skcmp; if (unlikely(cmp_status == SAM_STAT_CHECK_CONDITION)) { skreq->err_info = *skerr; @@ -2734,27 +1548,17 @@ static int skd_isr_completion_posted(struct skd_device *skdev, if (skreq->n_sg > 0) skd_postop_sg_list(skdev, skreq); - if (!skreq->req) { - pr_debug("%s:%s:%d NULL backptr skdreq %p, " - "req=0x%x req_id=0x%x\n", - skdev->name, __func__, __LINE__, - skreq, skreq->id, req_id); - } else { - /* - * Capture the outcome and post it back to the - * native request. - */ - if (likely(cmp_status == SAM_STAT_GOOD)) - skd_end_request(skdev, skreq, BLK_STS_OK); - else - skd_resolve_req_exception(skdev, skreq); - } + skd_release_skreq(skdev, skreq); /* - * Release the skreq, its FIT msg (if one), timeout slot, - * and queue depth. + * Capture the outcome and post it back to the native request. */ - skd_release_skreq(skdev, skreq); + if (likely(cmp_status == SAM_STAT_GOOD)) { + skreq->status = BLK_STS_OK; + blk_mq_complete_request(rq); + } else { + skd_resolve_req_exception(skdev, skreq, rq); + } /* skd_isr_comp_limit equal zero means no limit */ if (limit) { @@ -2765,8 +1569,8 @@ static int skd_isr_completion_posted(struct skd_device *skdev, } } - if ((skdev->state == SKD_DRVR_STATE_PAUSING) - && (skdev->in_flight) == 0) { + if (skdev->state == SKD_DRVR_STATE_PAUSING && + skd_in_flight(skdev) == 0) { skdev->state = SKD_DRVR_STATE_PAUSED; wake_up_interruptible(&skdev->waitq); } @@ -2775,21 +1579,22 @@ static int skd_isr_completion_posted(struct skd_device *skdev, } static void skd_complete_other(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 *skcomp, - volatile struct fit_comp_error_info *skerr) + struct fit_completion_entry_v1 *skcomp, + struct fit_comp_error_info *skerr) { u32 req_id = 0; u32 req_table; u32 req_slot; struct skd_special_context *skspcl; + lockdep_assert_held(&skdev->lock); + req_id = skcomp->tag; req_table = req_id & SKD_ID_TABLE_MASK; req_slot = req_id & SKD_ID_SLOT_MASK; - pr_debug("%s:%s:%d table=0x%x id=0x%x slot=%d\n", - skdev->name, __func__, __LINE__, - req_table, req_id, req_slot); + dev_dbg(&skdev->pdev->dev, "table=0x%x id=0x%x slot=%d\n", req_table, + req_id, req_slot); /* * Based on the request id, determine how to dispatch this completion. @@ -2799,28 +1604,12 @@ static void skd_complete_other(struct skd_device *skdev, switch (req_table) { case SKD_ID_RW_REQUEST: /* - * The caller, skd_completion_posted_isr() above, + * The caller, skd_isr_completion_posted() above, * handles r/w requests. The only way we get here * is if the req_slot is out of bounds. */ break; - case SKD_ID_SPECIAL_REQUEST: - /* - * Make sure the req_slot is in bounds and that the id - * matches. - */ - if (req_slot < skdev->n_special) { - skspcl = &skdev->skspcl_table[req_slot]; - if (skspcl->req.id == req_id && - skspcl->req.state == SKD_REQ_STATE_BUSY) { - skd_complete_special(skdev, - skcomp, skerr, skspcl); - return; - } - } - break; - case SKD_ID_INTERNAL: if (req_slot == 0) { skspcl = &skdev->internal_skspcl; @@ -2851,72 +1640,9 @@ static void skd_complete_other(struct skd_device *skdev, */ } -static void skd_complete_special(struct skd_device *skdev, - volatile struct fit_completion_entry_v1 - *skcomp, - volatile struct fit_comp_error_info *skerr, - struct skd_special_context *skspcl) -{ - pr_debug("%s:%s:%d completing special request %p\n", - skdev->name, __func__, __LINE__, skspcl); - if (skspcl->orphaned) { - /* Discard orphaned request */ - /* ?: Can this release directly or does it need - * to use a worker? */ - pr_debug("%s:%s:%d release orphaned %p\n", - skdev->name, __func__, __LINE__, skspcl); - skd_release_special(skdev, skspcl); - return; - } - - skd_process_scsi_inq(skdev, skcomp, skerr, skspcl); - - skspcl->req.state = SKD_REQ_STATE_COMPLETED; - skspcl->req.completion = *skcomp; - skspcl->req.err_info = *skerr; - - skd_log_check_status(skdev, skspcl->req.completion.status, skerr->key, - skerr->code, skerr->qual, skerr->fruc); - - wake_up_interruptible(&skdev->waitq); -} - -/* assume spinlock is already held */ -static void skd_release_special(struct skd_device *skdev, - struct skd_special_context *skspcl) -{ - int i, was_depleted; - - for (i = 0; i < skspcl->req.n_sg; i++) { - struct page *page = sg_page(&skspcl->req.sg[i]); - __free_page(page); - } - - was_depleted = (skdev->skspcl_free_list == NULL); - - skspcl->req.state = SKD_REQ_STATE_IDLE; - skspcl->req.id += SKD_ID_INCR; - skspcl->req.next = - (struct skd_request_context *)skdev->skspcl_free_list; - skdev->skspcl_free_list = (struct skd_special_context *)skspcl; - - if (was_depleted) { - pr_debug("%s:%s:%d skspcl was depleted\n", - skdev->name, __func__, __LINE__); - /* Free list was depleted. Their might be waiters. */ - wake_up_interruptible(&skdev->waitq); - } -} - static void skd_reset_skcomp(struct skd_device *skdev) { - u32 nbytes; - struct fit_completion_entry_v1 *skcomp; - - nbytes = sizeof(*skcomp) * SKD_N_COMPLETION_ENTRY; - nbytes += sizeof(struct fit_comp_error_info) * SKD_N_COMPLETION_ENTRY; - - memset(skdev->skcomp_table, 0, nbytes); + memset(skdev->skcomp_table, 0, SKD_SKCOMP_SIZE); skdev->skcomp_ix = 0; skdev->skcomp_cycle = 1; @@ -2941,7 +1667,7 @@ static void skd_completion_worker(struct work_struct *work) * process everything in compq */ skd_isr_completion_posted(skdev, 0, &flush_enqueued); - skd_request_fn(skdev->queue); + schedule_work(&skdev->start_queue); spin_unlock_irqrestore(&skdev->lock, flags); } @@ -2951,14 +1677,13 @@ static void skd_isr_msg_from_dev(struct skd_device *skdev); static irqreturn_t skd_isr(int irq, void *ptr) { - struct skd_device *skdev; + struct skd_device *skdev = ptr; u32 intstat; u32 ack; int rc = 0; int deferred = 0; int flush_enqueued = 0; - skdev = (struct skd_device *)ptr; spin_lock(&skdev->lock); for (;; ) { @@ -2967,8 +1692,8 @@ skd_isr(int irq, void *ptr) ack = FIT_INT_DEF_MASK; ack &= intstat; - pr_debug("%s:%s:%d intstat=0x%x ack=0x%x\n", - skdev->name, __func__, __LINE__, intstat, ack); + dev_dbg(&skdev->pdev->dev, "intstat=0x%x ack=0x%x\n", intstat, + ack); /* As long as there is an int pending on device, keep * running loop. When none, get out, but if we've never @@ -3018,12 +1743,12 @@ skd_isr(int irq, void *ptr) } if (unlikely(flush_enqueued)) - skd_request_fn(skdev->queue); + schedule_work(&skdev->start_queue); if (deferred) schedule_work(&skdev->completion_worker); else if (!flush_enqueued) - skd_request_fn(skdev->queue); + schedule_work(&skdev->start_queue); spin_unlock(&skdev->lock); @@ -3033,13 +1758,13 @@ skd_isr(int irq, void *ptr) static void skd_drive_fault(struct skd_device *skdev) { skdev->state = SKD_DRVR_STATE_FAULT; - pr_err("(%s): Drive FAULT\n", skd_name(skdev)); + dev_err(&skdev->pdev->dev, "Drive FAULT\n"); } static void skd_drive_disappeared(struct skd_device *skdev) { skdev->state = SKD_DRVR_STATE_DISAPPEARED; - pr_err("(%s): Drive DISAPPEARED\n", skd_name(skdev)); + dev_err(&skdev->pdev->dev, "Drive DISAPPEARED\n"); } static void skd_isr_fwstate(struct skd_device *skdev) @@ -3052,10 +1777,9 @@ static void skd_isr_fwstate(struct skd_device *skdev) sense = SKD_READL(skdev, FIT_STATUS); state = sense & FIT_SR_DRIVE_STATE_MASK; - pr_err("(%s): s1120 state %s(%d)=>%s(%d)\n", - skd_name(skdev), - skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, - skd_drive_state_to_str(state), state); + dev_err(&skdev->pdev->dev, "s1120 state %s(%d)=>%s(%d)\n", + skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, + skd_drive_state_to_str(state), state); skdev->drive_state = state; @@ -3066,7 +1790,7 @@ static void skd_isr_fwstate(struct skd_device *skdev) break; } if (skdev->state == SKD_DRVR_STATE_RESTARTING) - skd_recover_requests(skdev, 0); + skd_recover_requests(skdev); if (skdev->state == SKD_DRVR_STATE_WAIT_BOOT) { skdev->timer_countdown = SKD_STARTING_TIMO; skdev->state = SKD_DRVR_STATE_STARTING; @@ -3087,11 +1811,11 @@ static void skd_isr_fwstate(struct skd_device *skdev) skdev->cur_max_queue_depth * 2 / 3 + 1; if (skdev->queue_low_water_mark < 1) skdev->queue_low_water_mark = 1; - pr_info( - "(%s): Queue depth limit=%d dev=%d lowat=%d\n", - skd_name(skdev), - skdev->cur_max_queue_depth, - skdev->dev_max_queue_depth, skdev->queue_low_water_mark); + dev_info(&skdev->pdev->dev, + "Queue depth limit=%d dev=%d lowat=%d\n", + skdev->cur_max_queue_depth, + skdev->dev_max_queue_depth, + skdev->queue_low_water_mark); skd_refresh_device_data(skdev); break; @@ -3107,7 +1831,7 @@ static void skd_isr_fwstate(struct skd_device *skdev) */ skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; skdev->timer_countdown = SKD_TIMER_SECONDS(3); - blk_start_queue(skdev->queue); + schedule_work(&skdev->start_queue); break; case FIT_SR_DRIVE_BUSY_ERASE: skdev->state = SKD_DRVR_STATE_BUSY_ERASE; @@ -3128,8 +1852,7 @@ static void skd_isr_fwstate(struct skd_device *skdev) } break; case FIT_SR_DRIVE_FW_BOOTING: - pr_debug("%s:%s:%d ISR FIT_SR_DRIVE_FW_BOOTING %s\n", - skdev->name, __func__, __LINE__, skdev->name); + dev_dbg(&skdev->pdev->dev, "ISR FIT_SR_DRIVE_FW_BOOTING\n"); skdev->state = SKD_DRVR_STATE_WAIT_BOOT; skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; break; @@ -3141,17 +1864,17 @@ static void skd_isr_fwstate(struct skd_device *skdev) case FIT_SR_DRIVE_FAULT: skd_drive_fault(skdev); - skd_recover_requests(skdev, 0); - blk_start_queue(skdev->queue); + skd_recover_requests(skdev); + schedule_work(&skdev->start_queue); break; /* PCIe bus returned all Fs? */ case 0xFF: - pr_info("(%s): state=0x%x sense=0x%x\n", - skd_name(skdev), state, sense); + dev_info(&skdev->pdev->dev, "state=0x%x sense=0x%x\n", state, + sense); skd_drive_disappeared(skdev); - skd_recover_requests(skdev, 0); - blk_start_queue(skdev->queue); + skd_recover_requests(skdev); + schedule_work(&skdev->start_queue); break; default: /* @@ -3159,92 +1882,33 @@ static void skd_isr_fwstate(struct skd_device *skdev) */ break; } - pr_err("(%s): Driver state %s(%d)=>%s(%d)\n", - skd_name(skdev), - skd_skdev_state_to_str(prev_driver_state), prev_driver_state, - skd_skdev_state_to_str(skdev->state), skdev->state); + dev_err(&skdev->pdev->dev, "Driver state %s(%d)=>%s(%d)\n", + skd_skdev_state_to_str(prev_driver_state), prev_driver_state, + skd_skdev_state_to_str(skdev->state), skdev->state); } -static void skd_recover_requests(struct skd_device *skdev, int requeue) +static void skd_recover_request(struct request *req, void *data, bool reserved) { - int i; - - for (i = 0; i < skdev->num_req_context; i++) { - struct skd_request_context *skreq = &skdev->skreq_table[i]; - - if (skreq->state == SKD_REQ_STATE_BUSY) { - skd_log_skreq(skdev, skreq, "recover"); - - SKD_ASSERT((skreq->id & SKD_ID_INCR) != 0); - SKD_ASSERT(skreq->req != NULL); - - /* Release DMA resources for the request. */ - if (skreq->n_sg > 0) - skd_postop_sg_list(skdev, skreq); - - if (requeue && - (unsigned long) ++skreq->req->special < - SKD_MAX_RETRIES) - blk_requeue_request(skdev->queue, skreq->req); - else - skd_end_request(skdev, skreq, BLK_STS_IOERR); - - skreq->req = NULL; - - skreq->state = SKD_REQ_STATE_IDLE; - skreq->id += SKD_ID_INCR; - } - if (i > 0) - skreq[-1].next = skreq; - skreq->next = NULL; - } - skdev->skreq_free_list = skdev->skreq_table; + struct skd_device *const skdev = data; + struct skd_request_context *skreq = blk_mq_rq_to_pdu(req); - for (i = 0; i < skdev->num_fitmsg_context; i++) { - struct skd_fitmsg_context *skmsg = &skdev->skmsg_table[i]; + if (skreq->state != SKD_REQ_STATE_BUSY) + return; - if (skmsg->state == SKD_MSG_STATE_BUSY) { - skd_log_skmsg(skdev, skmsg, "salvaged"); - SKD_ASSERT((skmsg->id & SKD_ID_INCR) != 0); - skmsg->state = SKD_MSG_STATE_IDLE; - skmsg->id += SKD_ID_INCR; - } - if (i > 0) - skmsg[-1].next = skmsg; - skmsg->next = NULL; - } - skdev->skmsg_free_list = skdev->skmsg_table; + skd_log_skreq(skdev, skreq, "recover"); - for (i = 0; i < skdev->n_special; i++) { - struct skd_special_context *skspcl = &skdev->skspcl_table[i]; + /* Release DMA resources for the request. */ + if (skreq->n_sg > 0) + skd_postop_sg_list(skdev, skreq); - /* If orphaned, reclaim it because it has already been reported - * to the process as an error (it was just waiting for - * a completion that didn't come, and now it will never come) - * If busy, change to a state that will cause it to error - * out in the wait routine and let it do the normal - * reporting and reclaiming - */ - if (skspcl->req.state == SKD_REQ_STATE_BUSY) { - if (skspcl->orphaned) { - pr_debug("%s:%s:%d orphaned %p\n", - skdev->name, __func__, __LINE__, - skspcl); - skd_release_special(skdev, skspcl); - } else { - pr_debug("%s:%s:%d not orphaned %p\n", - skdev->name, __func__, __LINE__, - skspcl); - skspcl->req.state = SKD_REQ_STATE_ABORTED; - } - } - } - skdev->skspcl_free_list = skdev->skspcl_table; - - for (i = 0; i < SKD_N_TIMEOUT_SLOT; i++) - skdev->timeout_slot[i] = 0; + skreq->state = SKD_REQ_STATE_IDLE; + skreq->status = BLK_STS_IOERR; + blk_mq_complete_request(req); +} - skdev->in_flight = 0; +static void skd_recover_requests(struct skd_device *skdev) +{ + blk_mq_tagset_busy_iter(&skdev->tag_set, skd_recover_request, skdev); } static void skd_isr_msg_from_dev(struct skd_device *skdev) @@ -3255,8 +1919,8 @@ static void skd_isr_msg_from_dev(struct skd_device *skdev) mfd = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); - pr_debug("%s:%s:%d mfd=0x%x last_mtd=0x%x\n", - skdev->name, __func__, __LINE__, mfd, skdev->last_mtd); + dev_dbg(&skdev->pdev->dev, "mfd=0x%x last_mtd=0x%x\n", mfd, + skdev->last_mtd); /* ignore any mtd that is an ack for something we didn't send */ if (FIT_MXD_TYPE(mfd) != FIT_MXD_TYPE(skdev->last_mtd)) @@ -3267,13 +1931,10 @@ static void skd_isr_msg_from_dev(struct skd_device *skdev) skdev->proto_ver = FIT_PROTOCOL_MAJOR_VER(mfd); if (skdev->proto_ver != FIT_PROTOCOL_VERSION_1) { - pr_err("(%s): protocol mismatch\n", - skdev->name); - pr_err("(%s): got=%d support=%d\n", - skdev->name, skdev->proto_ver, - FIT_PROTOCOL_VERSION_1); - pr_err("(%s): please upgrade driver\n", - skdev->name); + dev_err(&skdev->pdev->dev, "protocol mismatch\n"); + dev_err(&skdev->pdev->dev, " got=%d support=%d\n", + skdev->proto_ver, FIT_PROTOCOL_VERSION_1); + dev_err(&skdev->pdev->dev, " please upgrade driver\n"); skdev->state = SKD_DRVR_STATE_PROTOCOL_MISMATCH; skd_soft_reset(skdev); break; @@ -3327,9 +1988,8 @@ static void skd_isr_msg_from_dev(struct skd_device *skdev) SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); skdev->last_mtd = mtd; - pr_err("(%s): Time sync driver=0x%x device=0x%x\n", - skd_name(skdev), - skdev->connect_time_stamp, skdev->drive_jiffies); + dev_err(&skdev->pdev->dev, "Time sync driver=0x%x device=0x%x\n", + skdev->connect_time_stamp, skdev->drive_jiffies); break; case FIT_MTD_ARM_QUEUE: @@ -3351,8 +2011,7 @@ static void skd_disable_interrupts(struct skd_device *skdev) sense = SKD_READL(skdev, FIT_CONTROL); sense &= ~FIT_CR_ENABLE_INTERRUPTS; SKD_WRITEL(skdev, sense, FIT_CONTROL); - pr_debug("%s:%s:%d sense 0x%x\n", - skdev->name, __func__, __LINE__, sense); + dev_dbg(&skdev->pdev->dev, "sense 0x%x\n", sense); /* Note that the 1s is written. A 1-bit means * disable, a 0 means enable. @@ -3371,13 +2030,11 @@ static void skd_enable_interrupts(struct skd_device *skdev) /* Note that the compliment of mask is written. A 1-bit means * disable, a 0 means enable. */ SKD_WRITEL(skdev, ~val, FIT_INT_MASK_HOST); - pr_debug("%s:%s:%d interrupt mask=0x%x\n", - skdev->name, __func__, __LINE__, ~val); + dev_dbg(&skdev->pdev->dev, "interrupt mask=0x%x\n", ~val); val = SKD_READL(skdev, FIT_CONTROL); val |= FIT_CR_ENABLE_INTERRUPTS; - pr_debug("%s:%s:%d control=0x%x\n", - skdev->name, __func__, __LINE__, val); + dev_dbg(&skdev->pdev->dev, "control=0x%x\n", val); SKD_WRITEL(skdev, val, FIT_CONTROL); } @@ -3393,8 +2050,7 @@ static void skd_soft_reset(struct skd_device *skdev) val = SKD_READL(skdev, FIT_CONTROL); val |= (FIT_CR_SOFT_RESET); - pr_debug("%s:%s:%d control=0x%x\n", - skdev->name, __func__, __LINE__, val); + dev_dbg(&skdev->pdev->dev, "control=0x%x\n", val); SKD_WRITEL(skdev, val, FIT_CONTROL); } @@ -3411,8 +2067,7 @@ static void skd_start_device(struct skd_device *skdev) sense = SKD_READL(skdev, FIT_STATUS); - pr_debug("%s:%s:%d initial status=0x%x\n", - skdev->name, __func__, __LINE__, sense); + dev_dbg(&skdev->pdev->dev, "initial status=0x%x\n", sense); state = sense & FIT_SR_DRIVE_STATE_MASK; skdev->drive_state = state; @@ -3425,25 +2080,23 @@ static void skd_start_device(struct skd_device *skdev) switch (skdev->drive_state) { case FIT_SR_DRIVE_OFFLINE: - pr_err("(%s): Drive offline...\n", skd_name(skdev)); + dev_err(&skdev->pdev->dev, "Drive offline...\n"); break; case FIT_SR_DRIVE_FW_BOOTING: - pr_debug("%s:%s:%d FIT_SR_DRIVE_FW_BOOTING %s\n", - skdev->name, __func__, __LINE__, skdev->name); + dev_dbg(&skdev->pdev->dev, "FIT_SR_DRIVE_FW_BOOTING\n"); skdev->state = SKD_DRVR_STATE_WAIT_BOOT; skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; break; case FIT_SR_DRIVE_BUSY_SANITIZE: - pr_info("(%s): Start: BUSY_SANITIZE\n", - skd_name(skdev)); + dev_info(&skdev->pdev->dev, "Start: BUSY_SANITIZE\n"); skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; break; case FIT_SR_DRIVE_BUSY_ERASE: - pr_info("(%s): Start: BUSY_ERASE\n", skd_name(skdev)); + dev_info(&skdev->pdev->dev, "Start: BUSY_ERASE\n"); skdev->state = SKD_DRVR_STATE_BUSY_ERASE; skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; break; @@ -3454,14 +2107,13 @@ static void skd_start_device(struct skd_device *skdev) break; case FIT_SR_DRIVE_BUSY: - pr_err("(%s): Drive Busy...\n", skd_name(skdev)); + dev_err(&skdev->pdev->dev, "Drive Busy...\n"); skdev->state = SKD_DRVR_STATE_BUSY; skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; break; case FIT_SR_DRIVE_SOFT_RESET: - pr_err("(%s) drive soft reset in prog\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "drive soft reset in prog\n"); break; case FIT_SR_DRIVE_FAULT: @@ -3471,9 +2123,8 @@ static void skd_start_device(struct skd_device *skdev) */ skd_drive_fault(skdev); /*start the queue so we can respond with error to requests */ - pr_debug("%s:%s:%d starting %s queue\n", - skdev->name, __func__, __LINE__, skdev->name); - blk_start_queue(skdev->queue); + dev_dbg(&skdev->pdev->dev, "starting queue\n"); + schedule_work(&skdev->start_queue); skdev->gendisk_on = -1; wake_up_interruptible(&skdev->waitq); break; @@ -3483,38 +2134,33 @@ static void skd_start_device(struct skd_device *skdev) * to the BAR1 addresses. */ skd_drive_disappeared(skdev); /*start the queue so we can respond with error to requests */ - pr_debug("%s:%s:%d starting %s queue to error-out reqs\n", - skdev->name, __func__, __LINE__, skdev->name); - blk_start_queue(skdev->queue); + dev_dbg(&skdev->pdev->dev, + "starting queue to error-out reqs\n"); + schedule_work(&skdev->start_queue); skdev->gendisk_on = -1; wake_up_interruptible(&skdev->waitq); break; default: - pr_err("(%s) Start: unknown state %x\n", - skd_name(skdev), skdev->drive_state); + dev_err(&skdev->pdev->dev, "Start: unknown state %x\n", + skdev->drive_state); break; } state = SKD_READL(skdev, FIT_CONTROL); - pr_debug("%s:%s:%d FIT Control Status=0x%x\n", - skdev->name, __func__, __LINE__, state); + dev_dbg(&skdev->pdev->dev, "FIT Control Status=0x%x\n", state); state = SKD_READL(skdev, FIT_INT_STATUS_HOST); - pr_debug("%s:%s:%d Intr Status=0x%x\n", - skdev->name, __func__, __LINE__, state); + dev_dbg(&skdev->pdev->dev, "Intr Status=0x%x\n", state); state = SKD_READL(skdev, FIT_INT_MASK_HOST); - pr_debug("%s:%s:%d Intr Mask=0x%x\n", - skdev->name, __func__, __LINE__, state); + dev_dbg(&skdev->pdev->dev, "Intr Mask=0x%x\n", state); state = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); - pr_debug("%s:%s:%d Msg from Dev=0x%x\n", - skdev->name, __func__, __LINE__, state); + dev_dbg(&skdev->pdev->dev, "Msg from Dev=0x%x\n", state); state = SKD_READL(skdev, FIT_HW_VERSION); - pr_debug("%s:%s:%d HW version=0x%x\n", - skdev->name, __func__, __LINE__, state); + dev_dbg(&skdev->pdev->dev, "HW version=0x%x\n", state); spin_unlock_irqrestore(&skdev->lock, flags); } @@ -3529,14 +2175,12 @@ static void skd_stop_device(struct skd_device *skdev) spin_lock_irqsave(&skdev->lock, flags); if (skdev->state != SKD_DRVR_STATE_ONLINE) { - pr_err("(%s): skd_stop_device not online no sync\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "%s not online no sync\n", __func__); goto stop_out; } if (skspcl->req.state != SKD_REQ_STATE_IDLE) { - pr_err("(%s): skd_stop_device no special\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "%s no special\n", __func__); goto stop_out; } @@ -3554,16 +2198,13 @@ static void skd_stop_device(struct skd_device *skdev) switch (skdev->sync_done) { case 0: - pr_err("(%s): skd_stop_device no sync\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "%s no sync\n", __func__); break; case 1: - pr_err("(%s): skd_stop_device sync done\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "%s sync done\n", __func__); break; default: - pr_err("(%s): skd_stop_device sync error\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "%s sync error\n", __func__); } stop_out: @@ -3593,8 +2234,8 @@ stop_out: } if (dev_state != FIT_SR_DRIVE_INIT) - pr_err("(%s): skd_stop_device state error 0x%02x\n", - skd_name(skdev), dev_state); + dev_err(&skdev->pdev->dev, "%s state error 0x%02x\n", __func__, + dev_state); } /* assume spinlock is held */ @@ -3607,8 +2248,7 @@ static void skd_restart_device(struct skd_device *skdev) state = SKD_READL(skdev, FIT_STATUS); - pr_debug("%s:%s:%d drive status=0x%x\n", - skdev->name, __func__, __LINE__, state); + dev_dbg(&skdev->pdev->dev, "drive status=0x%x\n", state); state &= FIT_SR_DRIVE_STATE_MASK; skdev->drive_state = state; @@ -3628,9 +2268,8 @@ static int skd_quiesce_dev(struct skd_device *skdev) switch (skdev->state) { case SKD_DRVR_STATE_BUSY: case SKD_DRVR_STATE_BUSY_IMMINENT: - pr_debug("%s:%s:%d stopping %s queue\n", - skdev->name, __func__, __LINE__, skdev->name); - blk_stop_queue(skdev->queue); + dev_dbg(&skdev->pdev->dev, "stopping queue\n"); + blk_mq_stop_hw_queues(skdev->queue); break; case SKD_DRVR_STATE_ONLINE: case SKD_DRVR_STATE_STOPPING: @@ -3642,8 +2281,8 @@ static int skd_quiesce_dev(struct skd_device *skdev) case SKD_DRVR_STATE_RESUMING: default: rc = -EINVAL; - pr_debug("%s:%s:%d state [%d] not implemented\n", - skdev->name, __func__, __LINE__, skdev->state); + dev_dbg(&skdev->pdev->dev, "state [%d] not implemented\n", + skdev->state); } return rc; } @@ -3655,8 +2294,7 @@ static int skd_unquiesce_dev(struct skd_device *skdev) skd_log_skdev(skdev, "unquiesce"); if (skdev->state == SKD_DRVR_STATE_ONLINE) { - pr_debug("%s:%s:%d **** device already ONLINE\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "**** device already ONLINE\n"); return 0; } if (skdev->drive_state != FIT_SR_DRIVE_ONLINE) { @@ -3669,8 +2307,7 @@ static int skd_unquiesce_dev(struct skd_device *skdev) * to become available. */ skdev->state = SKD_DRVR_STATE_BUSY; - pr_debug("%s:%s:%d drive BUSY state\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "drive BUSY state\n"); return 0; } @@ -3689,26 +2326,24 @@ static int skd_unquiesce_dev(struct skd_device *skdev) case SKD_DRVR_STATE_IDLE: case SKD_DRVR_STATE_LOAD: skdev->state = SKD_DRVR_STATE_ONLINE; - pr_err("(%s): Driver state %s(%d)=>%s(%d)\n", - skd_name(skdev), - skd_skdev_state_to_str(prev_driver_state), - prev_driver_state, skd_skdev_state_to_str(skdev->state), - skdev->state); - pr_debug("%s:%s:%d **** device ONLINE...starting block queue\n", - skdev->name, __func__, __LINE__); - pr_debug("%s:%s:%d starting %s queue\n", - skdev->name, __func__, __LINE__, skdev->name); - pr_info("(%s): STEC s1120 ONLINE\n", skd_name(skdev)); - blk_start_queue(skdev->queue); + dev_err(&skdev->pdev->dev, "Driver state %s(%d)=>%s(%d)\n", + skd_skdev_state_to_str(prev_driver_state), + prev_driver_state, skd_skdev_state_to_str(skdev->state), + skdev->state); + dev_dbg(&skdev->pdev->dev, + "**** device ONLINE...starting block queue\n"); + dev_dbg(&skdev->pdev->dev, "starting queue\n"); + dev_info(&skdev->pdev->dev, "STEC s1120 ONLINE\n"); + schedule_work(&skdev->start_queue); skdev->gendisk_on = 1; wake_up_interruptible(&skdev->waitq); break; case SKD_DRVR_STATE_DISAPPEARED: default: - pr_debug("%s:%s:%d **** driver state %d, not implemented \n", - skdev->name, __func__, __LINE__, - skdev->state); + dev_dbg(&skdev->pdev->dev, + "**** driver state %d, not implemented\n", + skdev->state); return -EBUSY; } return 0; @@ -3726,11 +2361,10 @@ static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data) unsigned long flags; spin_lock_irqsave(&skdev->lock, flags); - pr_debug("%s:%s:%d MSIX = 0x%x\n", - skdev->name, __func__, __LINE__, - SKD_READL(skdev, FIT_INT_STATUS_HOST)); - pr_err("(%s): MSIX reserved irq %d = 0x%x\n", skd_name(skdev), - irq, SKD_READL(skdev, FIT_INT_STATUS_HOST)); + dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", + SKD_READL(skdev, FIT_INT_STATUS_HOST)); + dev_err(&skdev->pdev->dev, "MSIX reserved irq %d = 0x%x\n", irq, + SKD_READL(skdev, FIT_INT_STATUS_HOST)); SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST); spin_unlock_irqrestore(&skdev->lock, flags); return IRQ_HANDLED; @@ -3742,9 +2376,8 @@ static irqreturn_t skd_statec_isr(int irq, void *skd_host_data) unsigned long flags; spin_lock_irqsave(&skdev->lock, flags); - pr_debug("%s:%s:%d MSIX = 0x%x\n", - skdev->name, __func__, __LINE__, - SKD_READL(skdev, FIT_INT_STATUS_HOST)); + dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", + SKD_READL(skdev, FIT_INT_STATUS_HOST)); SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST); skd_isr_fwstate(skdev); spin_unlock_irqrestore(&skdev->lock, flags); @@ -3759,19 +2392,18 @@ static irqreturn_t skd_comp_q(int irq, void *skd_host_data) int deferred; spin_lock_irqsave(&skdev->lock, flags); - pr_debug("%s:%s:%d MSIX = 0x%x\n", - skdev->name, __func__, __LINE__, - SKD_READL(skdev, FIT_INT_STATUS_HOST)); + dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", + SKD_READL(skdev, FIT_INT_STATUS_HOST)); SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST); deferred = skd_isr_completion_posted(skdev, skd_isr_comp_limit, &flush_enqueued); if (flush_enqueued) - skd_request_fn(skdev->queue); + schedule_work(&skdev->start_queue); if (deferred) schedule_work(&skdev->completion_worker); else if (!flush_enqueued) - skd_request_fn(skdev->queue); + schedule_work(&skdev->start_queue); spin_unlock_irqrestore(&skdev->lock, flags); @@ -3784,9 +2416,8 @@ static irqreturn_t skd_msg_isr(int irq, void *skd_host_data) unsigned long flags; spin_lock_irqsave(&skdev->lock, flags); - pr_debug("%s:%s:%d MSIX = 0x%x\n", - skdev->name, __func__, __LINE__, - SKD_READL(skdev, FIT_INT_STATUS_HOST)); + dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", + SKD_READL(skdev, FIT_INT_STATUS_HOST)); SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST); skd_isr_msg_from_dev(skdev); spin_unlock_irqrestore(&skdev->lock, flags); @@ -3799,9 +2430,8 @@ static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data) unsigned long flags; spin_lock_irqsave(&skdev->lock, flags); - pr_debug("%s:%s:%d MSIX = 0x%x\n", - skdev->name, __func__, __LINE__, - SKD_READL(skdev, FIT_INT_STATUS_HOST)); + dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", + SKD_READL(skdev, FIT_INT_STATUS_HOST)); SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST); spin_unlock_irqrestore(&skdev->lock, flags); return IRQ_HANDLED; @@ -3850,8 +2480,7 @@ static int skd_acquire_msix(struct skd_device *skdev) rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT, PCI_IRQ_MSIX); if (rc < 0) { - pr_err("(%s): failed to enable MSI-X %d\n", - skd_name(skdev), rc); + dev_err(&skdev->pdev->dev, "failed to enable MSI-X %d\n", rc); goto out; } @@ -3859,8 +2488,7 @@ static int skd_acquire_msix(struct skd_device *skdev) sizeof(struct skd_msix_entry), GFP_KERNEL); if (!skdev->msix_entries) { rc = -ENOMEM; - pr_err("(%s): msix table allocation error\n", - skd_name(skdev)); + dev_err(&skdev->pdev->dev, "msix table allocation error\n"); goto out; } @@ -3877,16 +2505,15 @@ static int skd_acquire_msix(struct skd_device *skdev) msix_entries[i].handler, 0, qentry->isr_name, skdev); if (rc) { - pr_err("(%s): Unable to register(%d) MSI-X " - "handler %d: %s\n", - skd_name(skdev), rc, i, qentry->isr_name); + dev_err(&skdev->pdev->dev, + "Unable to register(%d) MSI-X handler %d: %s\n", + rc, i, qentry->isr_name); goto msix_out; } } - pr_debug("%s:%s:%d %s: <%s> msix %d irq(s) enabled\n", - skdev->name, __func__, __LINE__, - pci_name(pdev), skdev->name, SKD_MAX_MSIX_COUNT); + dev_dbg(&skdev->pdev->dev, "%d msix irq(s) enabled\n", + SKD_MAX_MSIX_COUNT); return 0; msix_out: @@ -3909,8 +2536,8 @@ static int skd_acquire_irq(struct skd_device *skdev) if (!rc) return 0; - pr_err("(%s): failed to enable MSI-X, re-trying with MSI %d\n", - skd_name(skdev), rc); + dev_err(&skdev->pdev->dev, + "failed to enable MSI-X, re-trying with MSI %d\n", rc); } snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME, @@ -3920,8 +2547,8 @@ static int skd_acquire_irq(struct skd_device *skdev) irq_flag |= PCI_IRQ_MSI; rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag); if (rc < 0) { - pr_err("(%s): failed to allocate the MSI interrupt %d\n", - skd_name(skdev), rc); + dev_err(&skdev->pdev->dev, + "failed to allocate the MSI interrupt %d\n", rc); return rc; } @@ -3930,8 +2557,8 @@ static int skd_acquire_irq(struct skd_device *skdev) skdev->isr_name, skdev); if (rc) { pci_free_irq_vectors(pdev); - pr_err("(%s): failed to allocate interrupt %d\n", - skd_name(skdev), rc); + dev_err(&skdev->pdev->dev, "failed to allocate interrupt %d\n", + rc); return rc; } @@ -3965,20 +2592,45 @@ static void skd_release_irq(struct skd_device *skdev) ***************************************************************************** */ +static void *skd_alloc_dma(struct skd_device *skdev, struct kmem_cache *s, + dma_addr_t *dma_handle, gfp_t gfp, + enum dma_data_direction dir) +{ + struct device *dev = &skdev->pdev->dev; + void *buf; + + buf = kmem_cache_alloc(s, gfp); + if (!buf) + return NULL; + *dma_handle = dma_map_single(dev, buf, s->size, dir); + if (dma_mapping_error(dev, *dma_handle)) { + kfree(buf); + buf = NULL; + } + return buf; +} + +static void skd_free_dma(struct skd_device *skdev, struct kmem_cache *s, + void *vaddr, dma_addr_t dma_handle, + enum dma_data_direction dir) +{ + if (!vaddr) + return; + + dma_unmap_single(&skdev->pdev->dev, dma_handle, s->size, dir); + kmem_cache_free(s, vaddr); +} + static int skd_cons_skcomp(struct skd_device *skdev) { int rc = 0; struct fit_completion_entry_v1 *skcomp; - u32 nbytes; - nbytes = sizeof(*skcomp) * SKD_N_COMPLETION_ENTRY; - nbytes += sizeof(struct fit_comp_error_info) * SKD_N_COMPLETION_ENTRY; + dev_dbg(&skdev->pdev->dev, + "comp pci_alloc, total bytes %zd entries %d\n", + SKD_SKCOMP_SIZE, SKD_N_COMPLETION_ENTRY); - pr_debug("%s:%s:%d comp pci_alloc, total bytes %d entries %d\n", - skdev->name, __func__, __LINE__, - nbytes, SKD_N_COMPLETION_ENTRY); - - skcomp = pci_zalloc_consistent(skdev->pdev, nbytes, + skcomp = pci_zalloc_consistent(skdev->pdev, SKD_SKCOMP_SIZE, &skdev->cq_dma_address); if (skcomp == NULL) { @@ -4000,14 +2652,14 @@ static int skd_cons_skmsg(struct skd_device *skdev) int rc = 0; u32 i; - pr_debug("%s:%s:%d skmsg_table kzalloc, struct %lu, count %u total %lu\n", - skdev->name, __func__, __LINE__, - sizeof(struct skd_fitmsg_context), - skdev->num_fitmsg_context, - sizeof(struct skd_fitmsg_context) * skdev->num_fitmsg_context); + dev_dbg(&skdev->pdev->dev, + "skmsg_table kcalloc, struct %lu, count %u total %lu\n", + sizeof(struct skd_fitmsg_context), skdev->num_fitmsg_context, + sizeof(struct skd_fitmsg_context) * skdev->num_fitmsg_context); - skdev->skmsg_table = kzalloc(sizeof(struct skd_fitmsg_context) - *skdev->num_fitmsg_context, GFP_KERNEL); + skdev->skmsg_table = kcalloc(skdev->num_fitmsg_context, + sizeof(struct skd_fitmsg_context), + GFP_KERNEL); if (skdev->skmsg_table == NULL) { rc = -ENOMEM; goto err_out; @@ -4020,9 +2672,8 @@ static int skd_cons_skmsg(struct skd_device *skdev) skmsg->id = i + SKD_ID_FIT_MSG; - skmsg->state = SKD_MSG_STATE_IDLE; skmsg->msg_buf = pci_alloc_consistent(skdev->pdev, - SKD_N_FITMSG_BYTES + 64, + SKD_N_FITMSG_BYTES, &skmsg->mb_dma_address); if (skmsg->msg_buf == NULL) { @@ -4030,22 +2681,13 @@ static int skd_cons_skmsg(struct skd_device *skdev) goto err_out; } - skmsg->offset = (u32)((u64)skmsg->msg_buf & - (~FIT_QCMD_BASE_ADDRESS_MASK)); - skmsg->msg_buf += ~FIT_QCMD_BASE_ADDRESS_MASK; - skmsg->msg_buf = (u8 *)((u64)skmsg->msg_buf & - FIT_QCMD_BASE_ADDRESS_MASK); - skmsg->mb_dma_address += ~FIT_QCMD_BASE_ADDRESS_MASK; - skmsg->mb_dma_address &= FIT_QCMD_BASE_ADDRESS_MASK; + WARN(((uintptr_t)skmsg->msg_buf | skmsg->mb_dma_address) & + (FIT_QCMD_ALIGN - 1), + "not aligned: msg_buf %p mb_dma_address %#llx\n", + skmsg->msg_buf, skmsg->mb_dma_address); memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES); - - skmsg->next = &skmsg[1]; } - /* Free list is in order starting with the 0th entry. */ - skdev->skmsg_table[i - 1].next = NULL; - skdev->skmsg_free_list = skdev->skmsg_table; - err_out: return rc; } @@ -4055,18 +2697,14 @@ static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, dma_addr_t *ret_dma_addr) { struct fit_sg_descriptor *sg_list; - u32 nbytes; - - nbytes = sizeof(*sg_list) * n_sg; - sg_list = pci_alloc_consistent(skdev->pdev, nbytes, ret_dma_addr); + sg_list = skd_alloc_dma(skdev, skdev->sglist_cache, ret_dma_addr, + GFP_DMA | __GFP_ZERO, DMA_TO_DEVICE); if (sg_list != NULL) { uint64_t dma_address = *ret_dma_addr; u32 i; - memset(sg_list, 0, nbytes); - for (i = 0; i < n_sg - 1; i++) { uint64_t ndp_off; ndp_off = (i + 1) * sizeof(struct fit_sg_descriptor); @@ -4079,153 +2717,63 @@ static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, return sg_list; } -static int skd_cons_skreq(struct skd_device *skdev) +static void skd_free_sg_list(struct skd_device *skdev, + struct fit_sg_descriptor *sg_list, + dma_addr_t dma_addr) { - int rc = 0; - u32 i; - - pr_debug("%s:%s:%d skreq_table kzalloc, struct %lu, count %u total %lu\n", - skdev->name, __func__, __LINE__, - sizeof(struct skd_request_context), - skdev->num_req_context, - sizeof(struct skd_request_context) * skdev->num_req_context); - - skdev->skreq_table = kzalloc(sizeof(struct skd_request_context) - * skdev->num_req_context, GFP_KERNEL); - if (skdev->skreq_table == NULL) { - rc = -ENOMEM; - goto err_out; - } - - pr_debug("%s:%s:%d alloc sg_table sg_per_req %u scatlist %lu total %lu\n", - skdev->name, __func__, __LINE__, - skdev->sgs_per_request, sizeof(struct scatterlist), - skdev->sgs_per_request * sizeof(struct scatterlist)); - - for (i = 0; i < skdev->num_req_context; i++) { - struct skd_request_context *skreq; - - skreq = &skdev->skreq_table[i]; - - skreq->id = i + SKD_ID_RW_REQUEST; - skreq->state = SKD_REQ_STATE_IDLE; - - skreq->sg = kzalloc(sizeof(struct scatterlist) * - skdev->sgs_per_request, GFP_KERNEL); - if (skreq->sg == NULL) { - rc = -ENOMEM; - goto err_out; - } - sg_init_table(skreq->sg, skdev->sgs_per_request); - - skreq->sksg_list = skd_cons_sg_list(skdev, - skdev->sgs_per_request, - &skreq->sksg_dma_address); - - if (skreq->sksg_list == NULL) { - rc = -ENOMEM; - goto err_out; - } - - skreq->next = &skreq[1]; - } - - /* Free list is in order starting with the 0th entry. */ - skdev->skreq_table[i - 1].next = NULL; - skdev->skreq_free_list = skdev->skreq_table; + if (WARN_ON_ONCE(!sg_list)) + return; -err_out: - return rc; + skd_free_dma(skdev, skdev->sglist_cache, sg_list, dma_addr, + DMA_TO_DEVICE); } -static int skd_cons_skspcl(struct skd_device *skdev) +static int skd_init_request(struct blk_mq_tag_set *set, struct request *rq, + unsigned int hctx_idx, unsigned int numa_node) { - int rc = 0; - u32 i, nbytes; - - pr_debug("%s:%s:%d skspcl_table kzalloc, struct %lu, count %u total %lu\n", - skdev->name, __func__, __LINE__, - sizeof(struct skd_special_context), - skdev->n_special, - sizeof(struct skd_special_context) * skdev->n_special); - - skdev->skspcl_table = kzalloc(sizeof(struct skd_special_context) - * skdev->n_special, GFP_KERNEL); - if (skdev->skspcl_table == NULL) { - rc = -ENOMEM; - goto err_out; - } + struct skd_device *skdev = set->driver_data; + struct skd_request_context *skreq = blk_mq_rq_to_pdu(rq); - for (i = 0; i < skdev->n_special; i++) { - struct skd_special_context *skspcl; - - skspcl = &skdev->skspcl_table[i]; - - skspcl->req.id = i + SKD_ID_SPECIAL_REQUEST; - skspcl->req.state = SKD_REQ_STATE_IDLE; - - skspcl->req.next = &skspcl[1].req; - - nbytes = SKD_N_SPECIAL_FITMSG_BYTES; - - skspcl->msg_buf = - pci_zalloc_consistent(skdev->pdev, nbytes, - &skspcl->mb_dma_address); - if (skspcl->msg_buf == NULL) { - rc = -ENOMEM; - goto err_out; - } - - skspcl->req.sg = kzalloc(sizeof(struct scatterlist) * - SKD_N_SG_PER_SPECIAL, GFP_KERNEL); - if (skspcl->req.sg == NULL) { - rc = -ENOMEM; - goto err_out; - } - - skspcl->req.sksg_list = skd_cons_sg_list(skdev, - SKD_N_SG_PER_SPECIAL, - &skspcl->req. - sksg_dma_address); - if (skspcl->req.sksg_list == NULL) { - rc = -ENOMEM; - goto err_out; - } - } + skreq->state = SKD_REQ_STATE_IDLE; + skreq->sg = (void *)(skreq + 1); + sg_init_table(skreq->sg, skd_sgs_per_request); + skreq->sksg_list = skd_cons_sg_list(skdev, skd_sgs_per_request, + &skreq->sksg_dma_address); - /* Free list is in order starting with the 0th entry. */ - skdev->skspcl_table[i - 1].req.next = NULL; - skdev->skspcl_free_list = skdev->skspcl_table; + return skreq->sksg_list ? 0 : -ENOMEM; +} - return rc; +static void skd_exit_request(struct blk_mq_tag_set *set, struct request *rq, + unsigned int hctx_idx) +{ + struct skd_device *skdev = set->driver_data; + struct skd_request_context *skreq = blk_mq_rq_to_pdu(rq); -err_out: - return rc; + skd_free_sg_list(skdev, skreq->sksg_list, skreq->sksg_dma_address); } static int skd_cons_sksb(struct skd_device *skdev) { int rc = 0; struct skd_special_context *skspcl; - u32 nbytes; skspcl = &skdev->internal_skspcl; skspcl->req.id = 0 + SKD_ID_INTERNAL; skspcl->req.state = SKD_REQ_STATE_IDLE; - nbytes = SKD_N_INTERNAL_BYTES; - - skspcl->data_buf = pci_zalloc_consistent(skdev->pdev, nbytes, - &skspcl->db_dma_address); + skspcl->data_buf = skd_alloc_dma(skdev, skdev->databuf_cache, + &skspcl->db_dma_address, + GFP_DMA | __GFP_ZERO, + DMA_BIDIRECTIONAL); if (skspcl->data_buf == NULL) { rc = -ENOMEM; goto err_out; } - nbytes = SKD_N_SPECIAL_FITMSG_BYTES; - skspcl->msg_buf = pci_zalloc_consistent(skdev->pdev, nbytes, - &skspcl->mb_dma_address); + skspcl->msg_buf = skd_alloc_dma(skdev, skdev->msgbuf_cache, + &skspcl->mb_dma_address, + GFP_DMA | __GFP_ZERO, DMA_TO_DEVICE); if (skspcl->msg_buf == NULL) { rc = -ENOMEM; goto err_out; @@ -4247,6 +2795,14 @@ err_out: return rc; } +static const struct blk_mq_ops skd_mq_ops = { + .queue_rq = skd_mq_queue_rq, + .complete = skd_complete_rq, + .timeout = skd_timed_out, + .init_request = skd_init_request, + .exit_request = skd_exit_request, +}; + static int skd_cons_disk(struct skd_device *skdev) { int rc = 0; @@ -4268,31 +2824,46 @@ static int skd_cons_disk(struct skd_device *skdev) disk->fops = &skd_blockdev_ops; disk->private_data = skdev; - q = blk_init_queue(skd_request_fn, &skdev->lock); - if (!q) { - rc = -ENOMEM; + memset(&skdev->tag_set, 0, sizeof(skdev->tag_set)); + skdev->tag_set.ops = &skd_mq_ops; + skdev->tag_set.nr_hw_queues = 1; + skdev->tag_set.queue_depth = skd_max_queue_depth; + skdev->tag_set.cmd_size = sizeof(struct skd_request_context) + + skdev->sgs_per_request * sizeof(struct scatterlist); + skdev->tag_set.numa_node = NUMA_NO_NODE; + skdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | + BLK_MQ_F_SG_MERGE | + BLK_ALLOC_POLICY_TO_MQ_FLAG(BLK_TAG_ALLOC_FIFO); + skdev->tag_set.driver_data = skdev; + rc = blk_mq_alloc_tag_set(&skdev->tag_set); + if (rc) + goto err_out; + q = blk_mq_init_queue(&skdev->tag_set); + if (IS_ERR(q)) { + blk_mq_free_tag_set(&skdev->tag_set); + rc = PTR_ERR(q); goto err_out; } - blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH); + q->queuedata = skdev; skdev->queue = q; disk->queue = q; - q->queuedata = skdev; blk_queue_write_cache(q, true, true); blk_queue_max_segments(q, skdev->sgs_per_request); blk_queue_max_hw_sectors(q, SKD_N_MAX_SECTORS); - /* set sysfs ptimal_io_size to 8K */ + /* set optimal I/O size to 8KB */ blk_queue_io_opt(q, 8192); queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); + blk_queue_rq_timeout(q, 8 * HZ); + spin_lock_irqsave(&skdev->lock, flags); - pr_debug("%s:%s:%d stopping %s queue\n", - skdev->name, __func__, __LINE__, skdev->name); - blk_stop_queue(skdev->queue); + dev_dbg(&skdev->pdev->dev, "stopping queue\n"); + blk_mq_stop_hw_queues(skdev->queue); spin_unlock_irqrestore(&skdev->lock, flags); err_out: @@ -4306,13 +2877,13 @@ static struct skd_device *skd_construct(struct pci_dev *pdev) { struct skd_device *skdev; int blk_major = skd_major; + size_t size; int rc; skdev = kzalloc(sizeof(*skdev), GFP_KERNEL); if (!skdev) { - pr_err(PFX "(%s): memory alloc failure\n", - pci_name(pdev)); + dev_err(&pdev->dev, "memory alloc failure\n"); return NULL; } @@ -4320,60 +2891,71 @@ static struct skd_device *skd_construct(struct pci_dev *pdev) skdev->pdev = pdev; skdev->devno = skd_next_devno++; skdev->major = blk_major; - sprintf(skdev->name, DRV_NAME "%d", skdev->devno); skdev->dev_max_queue_depth = 0; skdev->num_req_context = skd_max_queue_depth; skdev->num_fitmsg_context = skd_max_queue_depth; - skdev->n_special = skd_max_pass_thru; skdev->cur_max_queue_depth = 1; skdev->queue_low_water_mark = 1; skdev->proto_ver = 99; skdev->sgs_per_request = skd_sgs_per_request; skdev->dbg_level = skd_dbg_level; - atomic_set(&skdev->device_count, 0); - spin_lock_init(&skdev->lock); + INIT_WORK(&skdev->start_queue, skd_start_queue); INIT_WORK(&skdev->completion_worker, skd_completion_worker); - pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__); - rc = skd_cons_skcomp(skdev); - if (rc < 0) + size = max(SKD_N_FITMSG_BYTES, SKD_N_SPECIAL_FITMSG_BYTES); + skdev->msgbuf_cache = kmem_cache_create("skd-msgbuf", size, 0, + SLAB_HWCACHE_ALIGN, NULL); + if (!skdev->msgbuf_cache) goto err_out; - - pr_debug("%s:%s:%d skmsg\n", skdev->name, __func__, __LINE__); - rc = skd_cons_skmsg(skdev); - if (rc < 0) + WARN_ONCE(kmem_cache_size(skdev->msgbuf_cache) < size, + "skd-msgbuf: %d < %zd\n", + kmem_cache_size(skdev->msgbuf_cache), size); + size = skd_sgs_per_request * sizeof(struct fit_sg_descriptor); + skdev->sglist_cache = kmem_cache_create("skd-sglist", size, 0, + SLAB_HWCACHE_ALIGN, NULL); + if (!skdev->sglist_cache) + goto err_out; + WARN_ONCE(kmem_cache_size(skdev->sglist_cache) < size, + "skd-sglist: %d < %zd\n", + kmem_cache_size(skdev->sglist_cache), size); + size = SKD_N_INTERNAL_BYTES; + skdev->databuf_cache = kmem_cache_create("skd-databuf", size, 0, + SLAB_HWCACHE_ALIGN, NULL); + if (!skdev->databuf_cache) goto err_out; + WARN_ONCE(kmem_cache_size(skdev->databuf_cache) < size, + "skd-databuf: %d < %zd\n", + kmem_cache_size(skdev->databuf_cache), size); - pr_debug("%s:%s:%d skreq\n", skdev->name, __func__, __LINE__); - rc = skd_cons_skreq(skdev); + dev_dbg(&skdev->pdev->dev, "skcomp\n"); + rc = skd_cons_skcomp(skdev); if (rc < 0) goto err_out; - pr_debug("%s:%s:%d skspcl\n", skdev->name, __func__, __LINE__); - rc = skd_cons_skspcl(skdev); + dev_dbg(&skdev->pdev->dev, "skmsg\n"); + rc = skd_cons_skmsg(skdev); if (rc < 0) goto err_out; - pr_debug("%s:%s:%d sksb\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "sksb\n"); rc = skd_cons_sksb(skdev); if (rc < 0) goto err_out; - pr_debug("%s:%s:%d disk\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "disk\n"); rc = skd_cons_disk(skdev); if (rc < 0) goto err_out; - pr_debug("%s:%s:%d VICTORY\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "VICTORY\n"); return skdev; err_out: - pr_debug("%s:%s:%d construct failed\n", - skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "construct failed\n"); skd_destruct(skdev); return NULL; } @@ -4386,14 +2968,9 @@ err_out: static void skd_free_skcomp(struct skd_device *skdev) { - if (skdev->skcomp_table != NULL) { - u32 nbytes; - - nbytes = sizeof(skdev->skcomp_table[0]) * - SKD_N_COMPLETION_ENTRY; - pci_free_consistent(skdev->pdev, nbytes, + if (skdev->skcomp_table) + pci_free_consistent(skdev->pdev, SKD_SKCOMP_SIZE, skdev->skcomp_table, skdev->cq_dma_address); - } skdev->skcomp_table = NULL; skdev->cq_dma_address = 0; @@ -4412,8 +2989,6 @@ static void skd_free_skmsg(struct skd_device *skdev) skmsg = &skdev->skmsg_table[i]; if (skmsg->msg_buf != NULL) { - skmsg->msg_buf += skmsg->offset; - skmsg->mb_dma_address += skmsg->offset; pci_free_consistent(skdev->pdev, SKD_N_FITMSG_BYTES, skmsg->msg_buf, skmsg->mb_dma_address); @@ -4426,109 +3001,23 @@ static void skd_free_skmsg(struct skd_device *skdev) skdev->skmsg_table = NULL; } -static void skd_free_sg_list(struct skd_device *skdev, - struct fit_sg_descriptor *sg_list, - u32 n_sg, dma_addr_t dma_addr) -{ - if (sg_list != NULL) { - u32 nbytes; - - nbytes = sizeof(*sg_list) * n_sg; - - pci_free_consistent(skdev->pdev, nbytes, sg_list, dma_addr); - } -} - -static void skd_free_skreq(struct skd_device *skdev) -{ - u32 i; - - if (skdev->skreq_table == NULL) - return; - - for (i = 0; i < skdev->num_req_context; i++) { - struct skd_request_context *skreq; - - skreq = &skdev->skreq_table[i]; - - skd_free_sg_list(skdev, skreq->sksg_list, - skdev->sgs_per_request, - skreq->sksg_dma_address); - - skreq->sksg_list = NULL; - skreq->sksg_dma_address = 0; - - kfree(skreq->sg); - } - - kfree(skdev->skreq_table); - skdev->skreq_table = NULL; -} - -static void skd_free_skspcl(struct skd_device *skdev) -{ - u32 i; - u32 nbytes; - - if (skdev->skspcl_table == NULL) - return; - - for (i = 0; i < skdev->n_special; i++) { - struct skd_special_context *skspcl; - - skspcl = &skdev->skspcl_table[i]; - - if (skspcl->msg_buf != NULL) { - nbytes = SKD_N_SPECIAL_FITMSG_BYTES; - pci_free_consistent(skdev->pdev, nbytes, - skspcl->msg_buf, - skspcl->mb_dma_address); - } - - skspcl->msg_buf = NULL; - skspcl->mb_dma_address = 0; - - skd_free_sg_list(skdev, skspcl->req.sksg_list, - SKD_N_SG_PER_SPECIAL, - skspcl->req.sksg_dma_address); - - skspcl->req.sksg_list = NULL; - skspcl->req.sksg_dma_address = 0; - - kfree(skspcl->req.sg); - } - - kfree(skdev->skspcl_table); - skdev->skspcl_table = NULL; -} - static void skd_free_sksb(struct skd_device *skdev) { - struct skd_special_context *skspcl; - u32 nbytes; - - skspcl = &skdev->internal_skspcl; - - if (skspcl->data_buf != NULL) { - nbytes = SKD_N_INTERNAL_BYTES; + struct skd_special_context *skspcl = &skdev->internal_skspcl; - pci_free_consistent(skdev->pdev, nbytes, - skspcl->data_buf, skspcl->db_dma_address); - } + skd_free_dma(skdev, skdev->databuf_cache, skspcl->data_buf, + skspcl->db_dma_address, DMA_BIDIRECTIONAL); skspcl->data_buf = NULL; skspcl->db_dma_address = 0; - if (skspcl->msg_buf != NULL) { - nbytes = SKD_N_SPECIAL_FITMSG_BYTES; - pci_free_consistent(skdev->pdev, nbytes, - skspcl->msg_buf, skspcl->mb_dma_address); - } + skd_free_dma(skdev, skdev->msgbuf_cache, skspcl->msg_buf, + skspcl->mb_dma_address, DMA_TO_DEVICE); skspcl->msg_buf = NULL; skspcl->mb_dma_address = 0; - skd_free_sg_list(skdev, skspcl->req.sksg_list, 1, + skd_free_sg_list(skdev, skspcl->req.sksg_list, skspcl->req.sksg_dma_address); skspcl->req.sksg_list = NULL; @@ -4539,15 +3028,20 @@ static void skd_free_disk(struct skd_device *skdev) { struct gendisk *disk = skdev->disk; - if (disk != NULL) { - struct request_queue *q = disk->queue; + if (disk && (disk->flags & GENHD_FL_UP)) + del_gendisk(disk); - if (disk->flags & GENHD_FL_UP) - del_gendisk(disk); - if (q) - blk_cleanup_queue(q); - put_disk(disk); + if (skdev->queue) { + blk_cleanup_queue(skdev->queue); + skdev->queue = NULL; + if (disk) + disk->queue = NULL; } + + if (skdev->tag_set.tags) + blk_mq_free_tag_set(&skdev->tag_set); + + put_disk(disk); skdev->disk = NULL; } @@ -4556,26 +3050,25 @@ static void skd_destruct(struct skd_device *skdev) if (skdev == NULL) return; + cancel_work_sync(&skdev->start_queue); - pr_debug("%s:%s:%d disk\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "disk\n"); skd_free_disk(skdev); - pr_debug("%s:%s:%d sksb\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "sksb\n"); skd_free_sksb(skdev); - pr_debug("%s:%s:%d skspcl\n", skdev->name, __func__, __LINE__); - skd_free_skspcl(skdev); - - pr_debug("%s:%s:%d skreq\n", skdev->name, __func__, __LINE__); - skd_free_skreq(skdev); - - pr_debug("%s:%s:%d skmsg\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "skmsg\n"); skd_free_skmsg(skdev); - pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "skcomp\n"); skd_free_skcomp(skdev); - pr_debug("%s:%s:%d skdev\n", skdev->name, __func__, __LINE__); + kmem_cache_destroy(skdev->databuf_cache); + kmem_cache_destroy(skdev->sglist_cache); + kmem_cache_destroy(skdev->msgbuf_cache); + + dev_dbg(&skdev->pdev->dev, "skdev\n"); kfree(skdev); } @@ -4592,9 +3085,8 @@ static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) skdev = bdev->bd_disk->private_data; - pr_debug("%s:%s:%d %s: CMD[%s] getgeo device\n", - skdev->name, __func__, __LINE__, - bdev->bd_disk->disk_name, current->comm); + dev_dbg(&skdev->pdev->dev, "%s: CMD[%s] getgeo device\n", + bdev->bd_disk->disk_name, current->comm); if (skdev->read_cap_is_valid) { capacity = get_capacity(skdev->disk); @@ -4609,18 +3101,16 @@ static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) static int skd_bdev_attach(struct device *parent, struct skd_device *skdev) { - pr_debug("%s:%s:%d add_disk\n", skdev->name, __func__, __LINE__); + dev_dbg(&skdev->pdev->dev, "add_disk\n"); device_add_disk(parent, skdev->disk); return 0; } static const struct block_device_operations skd_blockdev_ops = { .owner = THIS_MODULE, - .ioctl = skd_bdev_ioctl, .getgeo = skd_bdev_getgeo, }; - /* ***************************************************************************** * PCIe DRIVER GLUE @@ -4671,10 +3161,8 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) char pci_str[32]; struct skd_device *skdev; - pr_info("STEC s1120 Driver(%s) version %s-b%s\n", - DRV_NAME, DRV_VERSION, DRV_BUILD_ID); - pr_info("(skd?:??:[%s]): vendor=%04X device=%04x\n", - pci_name(pdev), pdev->vendor, pdev->device); + dev_dbg(&pdev->dev, "vendor=%04X device=%04x\n", pdev->vendor, + pdev->device); rc = pci_enable_device(pdev); if (rc) @@ -4685,16 +3173,13 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); if (!rc) { if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { - - pr_err("(%s): consistent DMA mask error %d\n", - pci_name(pdev), rc); + dev_err(&pdev->dev, "consistent DMA mask error %d\n", + rc); } } else { - (rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))); + rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (rc) { - - pr_err("(%s): DMA mask error %d\n", - pci_name(pdev), rc); + dev_err(&pdev->dev, "DMA mask error %d\n", rc); goto err_out_regions; } } @@ -4714,19 +3199,17 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } skd_pci_info(skdev, pci_str); - pr_info("(%s): %s 64bit\n", skd_name(skdev), pci_str); + dev_info(&pdev->dev, "%s 64bit\n", pci_str); pci_set_master(pdev); rc = pci_enable_pcie_error_reporting(pdev); if (rc) { - pr_err( - "(%s): bad enable of PCIe error reporting rc=%d\n", - skd_name(skdev), rc); + dev_err(&pdev->dev, + "bad enable of PCIe error reporting rc=%d\n", rc); skdev->pcie_error_reporting_is_enabled = 0; } else skdev->pcie_error_reporting_is_enabled = 1; - pci_set_drvdata(pdev, skdev); for (i = 0; i < SKD_MAX_BARS; i++) { @@ -4735,21 +3218,19 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) skdev->mem_map[i] = ioremap(skdev->mem_phys[i], skdev->mem_size[i]); if (!skdev->mem_map[i]) { - pr_err("(%s): Unable to map adapter memory!\n", - skd_name(skdev)); + dev_err(&pdev->dev, + "Unable to map adapter memory!\n"); rc = -ENODEV; goto err_out_iounmap; } - pr_debug("%s:%s:%d mem_map=%p, phyd=%016llx, size=%d\n", - skdev->name, __func__, __LINE__, - skdev->mem_map[i], - (uint64_t)skdev->mem_phys[i], skdev->mem_size[i]); + dev_dbg(&pdev->dev, "mem_map=%p, phyd=%016llx, size=%d\n", + skdev->mem_map[i], (uint64_t)skdev->mem_phys[i], + skdev->mem_size[i]); } rc = skd_acquire_irq(skdev); if (rc) { - pr_err("(%s): interrupt resource error %d\n", - skd_name(skdev), rc); + dev_err(&pdev->dev, "interrupt resource error %d\n", rc); goto err_out_iounmap; } @@ -4771,29 +3252,14 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } else { /* we timed out, something is wrong with the device, don't add the disk structure */ - pr_err( - "(%s): error: waiting for s1120 timed out %d!\n", - skd_name(skdev), rc); + dev_err(&pdev->dev, "error: waiting for s1120 timed out %d!\n", + rc); /* in case of no error; we timeout with ENXIO */ if (!rc) rc = -ENXIO; goto err_out_timer; } - -#ifdef SKD_VMK_POLL_HANDLER - if (skdev->irq_type == SKD_IRQ_MSIX) { - /* MSIX completion handler is being used for coredump */ - vmklnx_scsi_register_poll_handler(skdev->scsi_host, - skdev->msix_entries[5].vector, - skd_comp_q, skdev); - } else { - vmklnx_scsi_register_poll_handler(skdev->scsi_host, - skdev->pdev->irq, skd_isr, - skdev); - } -#endif /* SKD_VMK_POLL_HANDLER */ - return rc; err_out_timer: @@ -4826,7 +3292,7 @@ static void skd_pci_remove(struct pci_dev *pdev) skdev = pci_get_drvdata(pdev); if (!skdev) { - pr_err("%s: no device data for PCI\n", pci_name(pdev)); + dev_err(&pdev->dev, "no device data for PCI\n"); return; } skd_stop_device(skdev); @@ -4834,7 +3300,7 @@ static void skd_pci_remove(struct pci_dev *pdev) for (i = 0; i < SKD_MAX_BARS; i++) if (skdev->mem_map[i]) - iounmap((u32 *)skdev->mem_map[i]); + iounmap(skdev->mem_map[i]); if (skdev->pcie_error_reporting_is_enabled) pci_disable_pcie_error_reporting(pdev); @@ -4855,7 +3321,7 @@ static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) skdev = pci_get_drvdata(pdev); if (!skdev) { - pr_err("%s: no device data for PCI\n", pci_name(pdev)); + dev_err(&pdev->dev, "no device data for PCI\n"); return -EIO; } @@ -4865,7 +3331,7 @@ static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) for (i = 0; i < SKD_MAX_BARS; i++) if (skdev->mem_map[i]) - iounmap((u32 *)skdev->mem_map[i]); + iounmap(skdev->mem_map[i]); if (skdev->pcie_error_reporting_is_enabled) pci_disable_pcie_error_reporting(pdev); @@ -4885,7 +3351,7 @@ static int skd_pci_resume(struct pci_dev *pdev) skdev = pci_get_drvdata(pdev); if (!skdev) { - pr_err("%s: no device data for PCI\n", pci_name(pdev)); + dev_err(&pdev->dev, "no device data for PCI\n"); return -1; } @@ -4903,15 +3369,14 @@ static int skd_pci_resume(struct pci_dev *pdev) if (!rc) { if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { - pr_err("(%s): consistent DMA mask error %d\n", - pci_name(pdev), rc); + dev_err(&pdev->dev, "consistent DMA mask error %d\n", + rc); } } else { rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (rc) { - pr_err("(%s): DMA mask error %d\n", - pci_name(pdev), rc); + dev_err(&pdev->dev, "DMA mask error %d\n", rc); goto err_out_regions; } } @@ -4919,8 +3384,8 @@ static int skd_pci_resume(struct pci_dev *pdev) pci_set_master(pdev); rc = pci_enable_pcie_error_reporting(pdev); if (rc) { - pr_err("(%s): bad enable of PCIe error reporting rc=%d\n", - skdev->name, rc); + dev_err(&pdev->dev, + "bad enable of PCIe error reporting rc=%d\n", rc); skdev->pcie_error_reporting_is_enabled = 0; } else skdev->pcie_error_reporting_is_enabled = 1; @@ -4932,21 +3397,17 @@ static int skd_pci_resume(struct pci_dev *pdev) skdev->mem_map[i] = ioremap(skdev->mem_phys[i], skdev->mem_size[i]); if (!skdev->mem_map[i]) { - pr_err("(%s): Unable to map adapter memory!\n", - skd_name(skdev)); + dev_err(&pdev->dev, "Unable to map adapter memory!\n"); rc = -ENODEV; goto err_out_iounmap; } - pr_debug("%s:%s:%d mem_map=%p, phyd=%016llx, size=%d\n", - skdev->name, __func__, __LINE__, - skdev->mem_map[i], - (uint64_t)skdev->mem_phys[i], skdev->mem_size[i]); + dev_dbg(&pdev->dev, "mem_map=%p, phyd=%016llx, size=%d\n", + skdev->mem_map[i], (uint64_t)skdev->mem_phys[i], + skdev->mem_size[i]); } rc = skd_acquire_irq(skdev); if (rc) { - - pr_err("(%s): interrupt resource error %d\n", - pci_name(pdev), rc); + dev_err(&pdev->dev, "interrupt resource error %d\n", rc); goto err_out_iounmap; } @@ -4984,15 +3445,15 @@ static void skd_pci_shutdown(struct pci_dev *pdev) { struct skd_device *skdev; - pr_err("skd_pci_shutdown called\n"); + dev_err(&pdev->dev, "%s called\n", __func__); skdev = pci_get_drvdata(pdev); if (!skdev) { - pr_err("%s: no device data for PCI\n", pci_name(pdev)); + dev_err(&pdev->dev, "no device data for PCI\n"); return; } - pr_err("%s: calling stop\n", skd_name(skdev)); + dev_err(&pdev->dev, "calling stop\n"); skd_stop_device(skdev); } @@ -5012,21 +3473,6 @@ static struct pci_driver skd_driver = { ***************************************************************************** */ -static const char *skd_name(struct skd_device *skdev) -{ - memset(skdev->id_str, 0, sizeof(skdev->id_str)); - - if (skdev->inquiry_is_valid) - snprintf(skdev->id_str, sizeof(skdev->id_str), "%s:%s:[%s]", - skdev->name, skdev->inq_serial_num, - pci_name(skdev->pdev)); - else - snprintf(skdev->id_str, sizeof(skdev->id_str), "%s:??:[%s]", - skdev->name, pci_name(skdev->pdev)); - - return skdev->id_str; -} - const char *skd_drive_state_to_str(int state) { switch (state) { @@ -5078,8 +3524,6 @@ const char *skd_skdev_state_to_str(enum skd_drvr_state state) return "PAUSING"; case SKD_DRVR_STATE_PAUSED: return "PAUSED"; - case SKD_DRVR_STATE_DRAINING_TIMEOUT: - return "DRAINING_TIMEOUT"; case SKD_DRVR_STATE_RESTARTING: return "RESTARTING"; case SKD_DRVR_STATE_RESUMING: @@ -5106,18 +3550,6 @@ const char *skd_skdev_state_to_str(enum skd_drvr_state state) } } -static const char *skd_skmsg_state_to_str(enum skd_fit_msg_state state) -{ - switch (state) { - case SKD_MSG_STATE_IDLE: - return "IDLE"; - case SKD_MSG_STATE_BUSY: - return "BUSY"; - default: - return "???"; - } -} - static const char *skd_skreq_state_to_str(enum skd_req_state state) { switch (state) { @@ -5131,8 +3563,6 @@ static const char *skd_skreq_state_to_str(enum skd_req_state state) return "COMPLETED"; case SKD_REQ_STATE_TIMEOUT: return "TIMEOUT"; - case SKD_REQ_STATE_ABORTED: - return "ABORTED"; default: return "???"; } @@ -5140,58 +3570,34 @@ static const char *skd_skreq_state_to_str(enum skd_req_state state) static void skd_log_skdev(struct skd_device *skdev, const char *event) { - pr_debug("%s:%s:%d (%s) skdev=%p event='%s'\n", - skdev->name, __func__, __LINE__, skdev->name, skdev, event); - pr_debug("%s:%s:%d drive_state=%s(%d) driver_state=%s(%d)\n", - skdev->name, __func__, __LINE__, - skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, - skd_skdev_state_to_str(skdev->state), skdev->state); - pr_debug("%s:%s:%d busy=%d limit=%d dev=%d lowat=%d\n", - skdev->name, __func__, __LINE__, - skdev->in_flight, skdev->cur_max_queue_depth, - skdev->dev_max_queue_depth, skdev->queue_low_water_mark); - pr_debug("%s:%s:%d timestamp=0x%x cycle=%d cycle_ix=%d\n", - skdev->name, __func__, __LINE__, - skdev->timeout_stamp, skdev->skcomp_cycle, skdev->skcomp_ix); -} - -static void skd_log_skmsg(struct skd_device *skdev, - struct skd_fitmsg_context *skmsg, const char *event) -{ - pr_debug("%s:%s:%d (%s) skmsg=%p event='%s'\n", - skdev->name, __func__, __LINE__, skdev->name, skmsg, event); - pr_debug("%s:%s:%d state=%s(%d) id=0x%04x length=%d\n", - skdev->name, __func__, __LINE__, - skd_skmsg_state_to_str(skmsg->state), skmsg->state, - skmsg->id, skmsg->length); + dev_dbg(&skdev->pdev->dev, "skdev=%p event='%s'\n", skdev, event); + dev_dbg(&skdev->pdev->dev, " drive_state=%s(%d) driver_state=%s(%d)\n", + skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, + skd_skdev_state_to_str(skdev->state), skdev->state); + dev_dbg(&skdev->pdev->dev, " busy=%d limit=%d dev=%d lowat=%d\n", + skd_in_flight(skdev), skdev->cur_max_queue_depth, + skdev->dev_max_queue_depth, skdev->queue_low_water_mark); + dev_dbg(&skdev->pdev->dev, " cycle=%d cycle_ix=%d\n", + skdev->skcomp_cycle, skdev->skcomp_ix); } static void skd_log_skreq(struct skd_device *skdev, struct skd_request_context *skreq, const char *event) { - pr_debug("%s:%s:%d (%s) skreq=%p event='%s'\n", - skdev->name, __func__, __LINE__, skdev->name, skreq, event); - pr_debug("%s:%s:%d state=%s(%d) id=0x%04x fitmsg=0x%04x\n", - skdev->name, __func__, __LINE__, - skd_skreq_state_to_str(skreq->state), skreq->state, - skreq->id, skreq->fitmsg_id); - pr_debug("%s:%s:%d timo=0x%x sg_dir=%d n_sg=%d\n", - skdev->name, __func__, __LINE__, - skreq->timeout_stamp, skreq->sg_data_dir, skreq->n_sg); - - if (skreq->req != NULL) { - struct request *req = skreq->req; - u32 lba = (u32)blk_rq_pos(req); - u32 count = blk_rq_sectors(req); - - pr_debug("%s:%s:%d " - "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", - skdev->name, __func__, __LINE__, - req, lba, lba, count, count, - (int)rq_data_dir(req)); - } else - pr_debug("%s:%s:%d req=NULL\n", - skdev->name, __func__, __LINE__); + struct request *req = blk_mq_rq_from_pdu(skreq); + u32 lba = blk_rq_pos(req); + u32 count = blk_rq_sectors(req); + + dev_dbg(&skdev->pdev->dev, "skreq=%p event='%s'\n", skreq, event); + dev_dbg(&skdev->pdev->dev, " state=%s(%d) id=0x%04x fitmsg=0x%04x\n", + skd_skreq_state_to_str(skreq->state), skreq->state, skreq->id, + skreq->fitmsg_id); + dev_dbg(&skdev->pdev->dev, " sg_dir=%d n_sg=%d\n", + skreq->data_dir, skreq->n_sg); + + dev_dbg(&skdev->pdev->dev, + "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", req, lba, lba, + count, count, (int)rq_data_dir(req)); } /* @@ -5202,7 +3608,14 @@ static void skd_log_skreq(struct skd_device *skdev, static int __init skd_init(void) { - pr_info(PFX " v%s-b%s loaded\n", DRV_VERSION, DRV_BUILD_ID); + BUILD_BUG_ON(sizeof(struct fit_completion_entry_v1) != 8); + BUILD_BUG_ON(sizeof(struct fit_comp_error_info) != 32); + BUILD_BUG_ON(sizeof(struct skd_command_header) != 16); + BUILD_BUG_ON(sizeof(struct skd_scsi_request) != 32); + BUILD_BUG_ON(sizeof(struct driver_inquiry_data) != 44); + BUILD_BUG_ON(offsetof(struct skd_msg_buf, fmh) != 0); + BUILD_BUG_ON(offsetof(struct skd_msg_buf, scsi) != 64); + BUILD_BUG_ON(sizeof(struct skd_msg_buf) != SKD_N_FITMSG_BYTES); switch (skd_isr_type) { case SKD_IRQ_LEGACY: @@ -5222,7 +3635,8 @@ static int __init skd_init(void) skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; } - if (skd_max_req_per_msg < 1 || skd_max_req_per_msg > 14) { + if (skd_max_req_per_msg < 1 || + skd_max_req_per_msg > SKD_MAX_REQ_PER_MSG) { pr_err(PFX "skd_max_req_per_msg %d invalid, re-set to %d\n", skd_max_req_per_msg, SKD_MAX_REQ_PER_MSG_DEFAULT); skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; @@ -5246,19 +3660,11 @@ static int __init skd_init(void) skd_isr_comp_limit = 0; } - if (skd_max_pass_thru < 1 || skd_max_pass_thru > 50) { - pr_err(PFX "skd_max_pass_thru %d invalid, re-set to %d\n", - skd_max_pass_thru, SKD_N_SPECIAL_CONTEXT); - skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; - } - return pci_register_driver(&skd_driver); } static void __exit skd_exit(void) { - pr_info(PFX " v%s-b%s unloading\n", DRV_VERSION, DRV_BUILD_ID); - pci_unregister_driver(&skd_driver); if (skd_major) diff --git a/drivers/block/skd_s1120.h b/drivers/block/skd_s1120.h index 61c757ff0161..de35f47e953c 100644 --- a/drivers/block/skd_s1120.h +++ b/drivers/block/skd_s1120.h @@ -1,19 +1,15 @@ -/* Copyright 2012 STEC, Inc. +/* + * Copyright 2012 STEC, Inc. + * Copyright (c) 2017 Western Digital Corporation or its affiliates. * - * This file is licensed under the terms of the 3-clause - * BSD License (http://opensource.org/licenses/BSD-3-Clause) - * or the GNU GPL-2.0 (http://www.gnu.org/licenses/gpl-2.0.html), - * at your option. Both licenses are also available in the LICENSE file - * distributed with this project. This file may not be copied, modified, - * or distributed except in accordance with those terms. + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. */ #ifndef SKD_S1120_H #define SKD_S1120_H -#pragma pack(push, s1120_h, 1) - /* * Q-channel, 64-bit r/w */ @@ -30,7 +26,7 @@ #define FIT_QCMD_MSGSIZE_128 (0x1 << 4) #define FIT_QCMD_MSGSIZE_256 (0x2 << 4) #define FIT_QCMD_MSGSIZE_512 (0x3 << 4) -#define FIT_QCMD_BASE_ADDRESS_MASK (0xFFFFFFFFFFFFFFC0ull) +#define FIT_QCMD_ALIGN L1_CACHE_BYTES /* * Control, 32-bit r/w @@ -250,7 +246,7 @@ struct fit_msg_hdr { * 20-23 of the FIT_MTD_FITFW_INIT response. */ struct fit_completion_entry_v1 { - uint32_t num_returned_bytes; + __be32 num_returned_bytes; uint16_t tag; uint8_t status; /* SCSI status */ uint8_t cycle; @@ -278,7 +274,7 @@ struct fit_comp_error_info { uint16_t sks_low; /* 10: Sense Key Specific (LSW) */ uint16_t reserved3; /* 12: Part of additional sense bytes (unused) */ uint16_t uec; /* 14: Additional Sense Bytes */ - uint64_t per; /* 16: Additional Sense Bytes */ + uint64_t per __packed; /* 16: Additional Sense Bytes */ uint8_t reserved4[2]; /* 1E: Additional Sense Bytes (unused) */ }; @@ -292,11 +288,11 @@ struct fit_comp_error_info { * Version one has the last 32 bits sg_list_len_bytes; */ struct skd_command_header { - uint64_t sg_list_dma_address; + __be64 sg_list_dma_address; uint16_t tag; uint8_t attribute; uint8_t add_cdb_len; /* In 32 bit words */ - uint32_t sg_list_len_bytes; + __be32 sg_list_len_bytes; }; struct skd_scsi_request { @@ -309,22 +305,20 @@ struct driver_inquiry_data { uint8_t peripheral_device_type:5; uint8_t qualifier:3; uint8_t page_code; - uint16_t page_length; - uint16_t pcie_bus_number; + __be16 page_length; + __be16 pcie_bus_number; uint8_t pcie_device_number; uint8_t pcie_function_number; uint8_t pcie_link_speed; uint8_t pcie_link_lanes; - uint16_t pcie_vendor_id; - uint16_t pcie_device_id; - uint16_t pcie_subsystem_vendor_id; - uint16_t pcie_subsystem_device_id; + __be16 pcie_vendor_id; + __be16 pcie_device_id; + __be16 pcie_subsystem_vendor_id; + __be16 pcie_subsystem_device_id; uint8_t reserved1[2]; uint8_t reserved2[3]; uint8_t driver_version_length; uint8_t driver_version[0x14]; }; -#pragma pack(pop, s1120_h) - #endif /* SKD_S1120_H */ diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c index 6b16ead1da58..ad9749463d4f 100644 --- a/drivers/block/sunvdc.c +++ b/drivers/block/sunvdc.c @@ -875,6 +875,56 @@ static void print_version(void) printk(KERN_INFO "%s", version); } +struct vdc_check_port_data { + int dev_no; + char *type; +}; + +static int vdc_device_probed(struct device *dev, void *arg) +{ + struct vio_dev *vdev = to_vio_dev(dev); + struct vdc_check_port_data *port_data; + + port_data = (struct vdc_check_port_data *)arg; + + if ((vdev->dev_no == port_data->dev_no) && + (!(strcmp((char *)&vdev->type, port_data->type))) && + dev_get_drvdata(dev)) { + /* This device has already been configured + * by vdc_port_probe() + */ + return 1; + } else { + return 0; + } +} + +/* Determine whether the VIO device is part of an mpgroup + * by locating all the virtual-device-port nodes associated + * with the parent virtual-device node for the VIO device + * and checking whether any of these nodes are vdc-ports + * which have already been configured. + * + * Returns true if this device is part of an mpgroup and has + * already been probed. + */ +static bool vdc_port_mpgroup_check(struct vio_dev *vdev) +{ + struct vdc_check_port_data port_data; + struct device *dev; + + port_data.dev_no = vdev->dev_no; + port_data.type = (char *)&vdev->type; + + dev = device_find_child(vdev->dev.parent, &port_data, + vdc_device_probed); + + if (dev) + return true; + + return false; +} + static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) { struct mdesc_handle *hp; @@ -893,6 +943,14 @@ static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) goto err_out_release_mdesc; } + /* Check if this device is part of an mpgroup */ + if (vdc_port_mpgroup_check(vdev)) { + printk(KERN_WARNING + "VIO: Ignoring extra vdisk port %s", + dev_name(&vdev->dev)); + goto err_out_release_mdesc; + } + port = kzalloc(sizeof(*port), GFP_KERNEL); err = -ENOMEM; if (!port) { @@ -943,6 +1001,9 @@ static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) if (err) goto err_out_free_tx_ring; + /* Note that the device driver_data is used to determine + * whether the port has been probed. + */ dev_set_drvdata(&vdev->dev, port); mdesc_release(hp); diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 1498b899a593..34e17ee799be 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -265,7 +265,7 @@ static blk_status_t virtio_queue_rq(struct blk_mq_hw_ctx *hctx, } spin_lock_irqsave(&vblk->vqs[qid].lock, flags); - if (req_op(req) == REQ_OP_SCSI_IN || req_op(req) == REQ_OP_SCSI_OUT) + if (blk_rq_is_scsi(req)) err = virtblk_add_req_scsi(vblk->vqs[qid].vq, vbr, vbr->sg, num); else err = virtblk_add_req(vblk->vqs[qid].vq, vbr, vbr->sg, num); @@ -381,6 +381,7 @@ static void virtblk_config_changed_work(struct work_struct *work) struct request_queue *q = vblk->disk->queue; char cap_str_2[10], cap_str_10[10]; char *envp[] = { "RESIZE=1", NULL }; + unsigned long long nblocks; u64 capacity; /* Host must always specify the capacity. */ @@ -393,16 +394,19 @@ static void virtblk_config_changed_work(struct work_struct *work) capacity = (sector_t)-1; } - string_get_size(capacity, queue_logical_block_size(q), + nblocks = DIV_ROUND_UP_ULL(capacity, queue_logical_block_size(q) >> 9); + + string_get_size(nblocks, queue_logical_block_size(q), STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); - string_get_size(capacity, queue_logical_block_size(q), + string_get_size(nblocks, queue_logical_block_size(q), STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); dev_notice(&vdev->dev, - "new size: %llu %d-byte logical blocks (%s/%s)\n", - (unsigned long long)capacity, - queue_logical_block_size(q), - cap_str_10, cap_str_2); + "new size: %llu %d-byte logical blocks (%s/%s)\n", + nblocks, + queue_logical_block_size(q), + cap_str_10, + cap_str_2); set_capacity(vblk->disk, capacity); revalidate_disk(vblk->disk); diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index fe7cd58c43d0..987d665e82de 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -705,9 +705,9 @@ static unsigned int xen_blkbk_unmap_prepare( GNTMAP_host_map, pages[i]->handle); pages[i]->handle = BLKBACK_INVALID_HANDLE; invcount++; - } + } - return invcount; + return invcount; } static void xen_blkbk_unmap_and_respond_callback(int result, struct gntab_unmap_queue_data *data) @@ -1251,6 +1251,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring, break; case BLKIF_OP_WRITE_BARRIER: drain = true; + /* fall through */ case BLKIF_OP_FLUSH_DISKCACHE: ring->st_f_req++; operation = REQ_OP_WRITE; @@ -1362,7 +1363,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring, goto fail_put_bio; biolist[nbio++] = bio; - bio->bi_bdev = preq.bdev; + bio_set_dev(bio, preq.bdev); bio->bi_private = pending_req; bio->bi_end_io = end_block_io_op; bio->bi_iter.bi_sector = preq.sector_number; @@ -1381,7 +1382,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring, goto fail_put_bio; biolist[nbio++] = bio; - bio->bi_bdev = preq.bdev; + bio_set_dev(bio, preq.bdev); bio->bi_private = pending_req; bio->bi_end_io = end_block_io_op; bio_set_op_attrs(bio, operation, operation_flags); diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 792da683e70d..21c1be1eb226 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -244,6 +244,7 @@ static int xen_blkif_disconnect(struct xen_blkif *blkif) { struct pending_req *req, *n; unsigned int j, r; + bool busy = false; for (r = 0; r < blkif->nr_rings; r++) { struct xen_blkif_ring *ring = &blkif->rings[r]; @@ -261,8 +262,10 @@ static int xen_blkif_disconnect(struct xen_blkif *blkif) * don't have any discard_io or other_io requests. So, checking * for inflight IO is enough. */ - if (atomic_read(&ring->inflight) > 0) - return -EBUSY; + if (atomic_read(&ring->inflight) > 0) { + busy = true; + continue; + } if (ring->irq) { unbind_from_irqhandler(ring->irq, ring); @@ -300,6 +303,9 @@ static int xen_blkif_disconnect(struct xen_blkif *blkif) WARN_ON(i != (XEN_BLKIF_REQS_PER_PAGE * blkif->nr_ring_pages)); ring->active = false; } + if (busy) + return -EBUSY; + blkif->nr_ring_pages = 0; /* * blkif->rings was allocated in connect_ring, so we should free it in @@ -810,7 +816,8 @@ static void frontend_changed(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosed); if (xenbus_dev_is_online(dev)) break; - /* fall through if not online */ + /* fall through */ + /* if not online */ case XenbusStateUnknown: /* implies xen_blkif_disconnect() via xen_blkbk_remove() */ device_unregister(&dev->dev); diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 98e34e4c62b8..891265acb10e 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2075,9 +2075,9 @@ static int blkfront_resume(struct xenbus_device *dev) /* * Get the bios in the request so we can re-queue them. */ - if (req_op(shadow[i].request) == REQ_OP_FLUSH || - req_op(shadow[i].request) == REQ_OP_DISCARD || - req_op(shadow[i].request) == REQ_OP_SECURE_ERASE || + if (req_op(shadow[j].request) == REQ_OP_FLUSH || + req_op(shadow[j].request) == REQ_OP_DISCARD || + req_op(shadow[j].request) == REQ_OP_SECURE_ERASE || shadow[j].request->cmd_flags & REQ_FUA) { /* * Flush operations don't contain bios, so @@ -2456,7 +2456,7 @@ static void blkback_changed(struct xenbus_device *dev, case XenbusStateClosed: if (dev->state == XenbusStateClosed) break; - /* Missed the backend's Closing state -- fallthrough */ + /* fall through */ case XenbusStateClosing: if (info) blkfront_closing(info); diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index b8ecba6dcd3b..7cd4a8ec3c8f 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -13,3 +13,15 @@ config ZRAM disks and maybe many more. See zram.txt for more information. + +config ZRAM_WRITEBACK + bool "Write back incompressible page to backing device" + depends on ZRAM + default n + help + With incompressible page, there is no memory saving to keep it + in memory. Instead, write it out to backing device. + For this feature, admin should set up backing device via + /sys/block/zramX/backing_dev. + + See zram.txt for more infomration. diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 856d5dc02451..4063f3f59f4f 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -270,6 +270,349 @@ static ssize_t mem_used_max_store(struct device *dev, return len; } +#ifdef CONFIG_ZRAM_WRITEBACK +static bool zram_wb_enabled(struct zram *zram) +{ + return zram->backing_dev; +} + +static void reset_bdev(struct zram *zram) +{ + struct block_device *bdev; + + if (!zram_wb_enabled(zram)) + return; + + bdev = zram->bdev; + if (zram->old_block_size) + set_blocksize(bdev, zram->old_block_size); + blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); + /* hope filp_close flush all of IO */ + filp_close(zram->backing_dev, NULL); + zram->backing_dev = NULL; + zram->old_block_size = 0; + zram->bdev = NULL; + + kvfree(zram->bitmap); + zram->bitmap = NULL; +} + +static ssize_t backing_dev_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct zram *zram = dev_to_zram(dev); + struct file *file = zram->backing_dev; + char *p; + ssize_t ret; + + down_read(&zram->init_lock); + if (!zram_wb_enabled(zram)) { + memcpy(buf, "none\n", 5); + up_read(&zram->init_lock); + return 5; + } + + p = file_path(file, buf, PAGE_SIZE - 1); + if (IS_ERR(p)) { + ret = PTR_ERR(p); + goto out; + } + + ret = strlen(p); + memmove(buf, p, ret); + buf[ret++] = '\n'; +out: + up_read(&zram->init_lock); + return ret; +} + +static ssize_t backing_dev_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + char *file_name; + struct file *backing_dev = NULL; + struct inode *inode; + struct address_space *mapping; + unsigned int bitmap_sz, old_block_size = 0; + unsigned long nr_pages, *bitmap = NULL; + struct block_device *bdev = NULL; + int err; + struct zram *zram = dev_to_zram(dev); + + file_name = kmalloc(PATH_MAX, GFP_KERNEL); + if (!file_name) + return -ENOMEM; + + down_write(&zram->init_lock); + if (init_done(zram)) { + pr_info("Can't setup backing device for initialized device\n"); + err = -EBUSY; + goto out; + } + + strlcpy(file_name, buf, len); + + backing_dev = filp_open(file_name, O_RDWR|O_LARGEFILE, 0); + if (IS_ERR(backing_dev)) { + err = PTR_ERR(backing_dev); + backing_dev = NULL; + goto out; + } + + mapping = backing_dev->f_mapping; + inode = mapping->host; + + /* Support only block device in this moment */ + if (!S_ISBLK(inode->i_mode)) { + err = -ENOTBLK; + goto out; + } + + bdev = bdgrab(I_BDEV(inode)); + err = blkdev_get(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL, zram); + if (err < 0) + goto out; + + nr_pages = i_size_read(inode) >> PAGE_SHIFT; + bitmap_sz = BITS_TO_LONGS(nr_pages) * sizeof(long); + bitmap = kvzalloc(bitmap_sz, GFP_KERNEL); + if (!bitmap) { + err = -ENOMEM; + goto out; + } + + old_block_size = block_size(bdev); + err = set_blocksize(bdev, PAGE_SIZE); + if (err) + goto out; + + reset_bdev(zram); + spin_lock_init(&zram->bitmap_lock); + + zram->old_block_size = old_block_size; + zram->bdev = bdev; + zram->backing_dev = backing_dev; + zram->bitmap = bitmap; + zram->nr_pages = nr_pages; + up_write(&zram->init_lock); + + pr_info("setup backing device %s\n", file_name); + kfree(file_name); + + return len; +out: + if (bitmap) + kvfree(bitmap); + + if (bdev) + blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); + + if (backing_dev) + filp_close(backing_dev, NULL); + + up_write(&zram->init_lock); + + kfree(file_name); + + return err; +} + +static unsigned long get_entry_bdev(struct zram *zram) +{ + unsigned long entry; + + spin_lock(&zram->bitmap_lock); + /* skip 0 bit to confuse zram.handle = 0 */ + entry = find_next_zero_bit(zram->bitmap, zram->nr_pages, 1); + if (entry == zram->nr_pages) { + spin_unlock(&zram->bitmap_lock); + return 0; + } + + set_bit(entry, zram->bitmap); + spin_unlock(&zram->bitmap_lock); + + return entry; +} + +static void put_entry_bdev(struct zram *zram, unsigned long entry) +{ + int was_set; + + spin_lock(&zram->bitmap_lock); + was_set = test_and_clear_bit(entry, zram->bitmap); + spin_unlock(&zram->bitmap_lock); + WARN_ON_ONCE(!was_set); +} + +void zram_page_end_io(struct bio *bio) +{ + struct page *page = bio->bi_io_vec[0].bv_page; + + page_endio(page, op_is_write(bio_op(bio)), + blk_status_to_errno(bio->bi_status)); + bio_put(bio); +} + +/* + * Returns 1 if the submission is successful. + */ +static int read_from_bdev_async(struct zram *zram, struct bio_vec *bvec, + unsigned long entry, struct bio *parent) +{ + struct bio *bio; + + bio = bio_alloc(GFP_ATOMIC, 1); + if (!bio) + return -ENOMEM; + + bio->bi_iter.bi_sector = entry * (PAGE_SIZE >> 9); + bio_set_dev(bio, zram->bdev); + if (!bio_add_page(bio, bvec->bv_page, bvec->bv_len, bvec->bv_offset)) { + bio_put(bio); + return -EIO; + } + + if (!parent) { + bio->bi_opf = REQ_OP_READ; + bio->bi_end_io = zram_page_end_io; + } else { + bio->bi_opf = parent->bi_opf; + bio_chain(bio, parent); + } + + submit_bio(bio); + return 1; +} + +struct zram_work { + struct work_struct work; + struct zram *zram; + unsigned long entry; + struct bio *bio; +}; + +#if PAGE_SIZE != 4096 +static void zram_sync_read(struct work_struct *work) +{ + struct bio_vec bvec; + struct zram_work *zw = container_of(work, struct zram_work, work); + struct zram *zram = zw->zram; + unsigned long entry = zw->entry; + struct bio *bio = zw->bio; + + read_from_bdev_async(zram, &bvec, entry, bio); +} + +/* + * Block layer want one ->make_request_fn to be active at a time + * so if we use chained IO with parent IO in same context, + * it's a deadlock. To avoid, it, it uses worker thread context. + */ +static int read_from_bdev_sync(struct zram *zram, struct bio_vec *bvec, + unsigned long entry, struct bio *bio) +{ + struct zram_work work; + + work.zram = zram; + work.entry = entry; + work.bio = bio; + + INIT_WORK_ONSTACK(&work.work, zram_sync_read); + queue_work(system_unbound_wq, &work.work); + flush_work(&work.work); + destroy_work_on_stack(&work.work); + + return 1; +} +#else +static int read_from_bdev_sync(struct zram *zram, struct bio_vec *bvec, + unsigned long entry, struct bio *bio) +{ + WARN_ON(1); + return -EIO; +} +#endif + +static int read_from_bdev(struct zram *zram, struct bio_vec *bvec, + unsigned long entry, struct bio *parent, bool sync) +{ + if (sync) + return read_from_bdev_sync(zram, bvec, entry, parent); + else + return read_from_bdev_async(zram, bvec, entry, parent); +} + +static int write_to_bdev(struct zram *zram, struct bio_vec *bvec, + u32 index, struct bio *parent, + unsigned long *pentry) +{ + struct bio *bio; + unsigned long entry; + + bio = bio_alloc(GFP_ATOMIC, 1); + if (!bio) + return -ENOMEM; + + entry = get_entry_bdev(zram); + if (!entry) { + bio_put(bio); + return -ENOSPC; + } + + bio->bi_iter.bi_sector = entry * (PAGE_SIZE >> 9); + bio_set_dev(bio, zram->bdev); + if (!bio_add_page(bio, bvec->bv_page, bvec->bv_len, + bvec->bv_offset)) { + bio_put(bio); + put_entry_bdev(zram, entry); + return -EIO; + } + + if (!parent) { + bio->bi_opf = REQ_OP_WRITE | REQ_SYNC; + bio->bi_end_io = zram_page_end_io; + } else { + bio->bi_opf = parent->bi_opf; + bio_chain(bio, parent); + } + + submit_bio(bio); + *pentry = entry; + + return 0; +} + +static void zram_wb_clear(struct zram *zram, u32 index) +{ + unsigned long entry; + + zram_clear_flag(zram, index, ZRAM_WB); + entry = zram_get_element(zram, index); + zram_set_element(zram, index, 0); + put_entry_bdev(zram, entry); +} + +#else +static bool zram_wb_enabled(struct zram *zram) { return false; } +static inline void reset_bdev(struct zram *zram) {}; +static int write_to_bdev(struct zram *zram, struct bio_vec *bvec, + u32 index, struct bio *parent, + unsigned long *pentry) + +{ + return -EIO; +} + +static int read_from_bdev(struct zram *zram, struct bio_vec *bvec, + unsigned long entry, struct bio *parent, bool sync) +{ + return -EIO; +} +static void zram_wb_clear(struct zram *zram, u32 index) {} +#endif + + /* * We switched to per-cpu streams and this attr is not needed anymore. * However, we will keep it around for some time, because: @@ -308,7 +651,7 @@ static ssize_t comp_algorithm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct zram *zram = dev_to_zram(dev); - char compressor[CRYPTO_MAX_ALG_NAME]; + char compressor[ARRAY_SIZE(zram->compressor)]; size_t sz; strlcpy(compressor, buf, sizeof(compressor)); @@ -327,7 +670,7 @@ static ssize_t comp_algorithm_store(struct device *dev, return -EBUSY; } - strlcpy(zram->compressor, compressor, sizeof(compressor)); + strcpy(zram->compressor, compressor); up_write(&zram->init_lock); return len; } @@ -453,30 +796,6 @@ static bool zram_same_page_read(struct zram *zram, u32 index, return false; } -static bool zram_same_page_write(struct zram *zram, u32 index, - struct page *page) -{ - unsigned long element; - void *mem = kmap_atomic(page); - - if (page_same_filled(mem, &element)) { - kunmap_atomic(mem); - /* Free memory associated with this sector now. */ - zram_slot_lock(zram, index); - zram_free_page(zram, index); - zram_set_flag(zram, index, ZRAM_SAME); - zram_set_element(zram, index, element); - zram_slot_unlock(zram, index); - - atomic64_inc(&zram->stats.same_pages); - atomic64_inc(&zram->stats.pages_stored); - return true; - } - kunmap_atomic(mem); - - return false; -} - static void zram_meta_free(struct zram *zram, u64 disksize) { size_t num_pages = disksize >> PAGE_SHIFT; @@ -515,7 +834,13 @@ static bool zram_meta_alloc(struct zram *zram, u64 disksize) */ static void zram_free_page(struct zram *zram, size_t index) { - unsigned long handle = zram_get_handle(zram, index); + unsigned long handle; + + if (zram_wb_enabled(zram) && zram_test_flag(zram, index, ZRAM_WB)) { + zram_wb_clear(zram, index); + atomic64_dec(&zram->stats.pages_stored); + return; + } /* * No memory is allocated for same element filled pages. @@ -529,6 +854,7 @@ static void zram_free_page(struct zram *zram, size_t index) return; } + handle = zram_get_handle(zram, index); if (!handle) return; @@ -542,13 +868,31 @@ static void zram_free_page(struct zram *zram, size_t index) zram_set_obj_size(zram, index, 0); } -static int zram_decompress_page(struct zram *zram, struct page *page, u32 index) +static int __zram_bvec_read(struct zram *zram, struct page *page, u32 index, + struct bio *bio, bool partial_io) { int ret; unsigned long handle; unsigned int size; void *src, *dst; + if (zram_wb_enabled(zram)) { + zram_slot_lock(zram, index); + if (zram_test_flag(zram, index, ZRAM_WB)) { + struct bio_vec bvec; + + zram_slot_unlock(zram, index); + + bvec.bv_page = page; + bvec.bv_len = PAGE_SIZE; + bvec.bv_offset = 0; + return read_from_bdev(zram, &bvec, + zram_get_element(zram, index), + bio, partial_io); + } + zram_slot_unlock(zram, index); + } + if (zram_same_page_read(zram, index, page, 0, PAGE_SIZE)) return 0; @@ -581,7 +925,7 @@ static int zram_decompress_page(struct zram *zram, struct page *page, u32 index) } static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec, - u32 index, int offset) + u32 index, int offset, struct bio *bio) { int ret; struct page *page; @@ -594,7 +938,7 @@ static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec, return -ENOMEM; } - ret = zram_decompress_page(zram, page, index); + ret = __zram_bvec_read(zram, page, index, bio, is_partial_io(bvec)); if (unlikely(ret)) goto out; @@ -613,30 +957,57 @@ out: return ret; } -static int zram_compress(struct zram *zram, struct zcomp_strm **zstrm, - struct page *page, - unsigned long *out_handle, unsigned int *out_comp_len) +static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec, + u32 index, struct bio *bio) { - int ret; - unsigned int comp_len; - void *src; + int ret = 0; unsigned long alloced_pages; unsigned long handle = 0; + unsigned int comp_len = 0; + void *src, *dst, *mem; + struct zcomp_strm *zstrm; + struct page *page = bvec->bv_page; + unsigned long element = 0; + enum zram_pageflags flags = 0; + bool allow_wb = true; + + mem = kmap_atomic(page); + if (page_same_filled(mem, &element)) { + kunmap_atomic(mem); + /* Free memory associated with this sector now. */ + flags = ZRAM_SAME; + atomic64_inc(&zram->stats.same_pages); + goto out; + } + kunmap_atomic(mem); compress_again: + zstrm = zcomp_stream_get(zram->comp); src = kmap_atomic(page); - ret = zcomp_compress(*zstrm, src, &comp_len); + ret = zcomp_compress(zstrm, src, &comp_len); kunmap_atomic(src); if (unlikely(ret)) { + zcomp_stream_put(zram->comp); pr_err("Compression failed! err=%d\n", ret); - if (handle) - zs_free(zram->mem_pool, handle); + zs_free(zram->mem_pool, handle); return ret; } - if (unlikely(comp_len > max_zpage_size)) + if (unlikely(comp_len > max_zpage_size)) { + if (zram_wb_enabled(zram) && allow_wb) { + zcomp_stream_put(zram->comp); + ret = write_to_bdev(zram, bvec, index, bio, &element); + if (!ret) { + flags = ZRAM_WB; + ret = 1; + goto out; + } + allow_wb = false; + goto compress_again; + } comp_len = PAGE_SIZE; + } /* * handle allocation has 2 paths: @@ -663,7 +1034,6 @@ compress_again: handle = zs_malloc(zram->mem_pool, comp_len, GFP_NOIO | __GFP_HIGHMEM | __GFP_MOVABLE); - *zstrm = zcomp_stream_get(zram->comp); if (handle) goto compress_again; return -ENOMEM; @@ -673,34 +1043,11 @@ compress_again: update_used_max(zram, alloced_pages); if (zram->limit_pages && alloced_pages > zram->limit_pages) { + zcomp_stream_put(zram->comp); zs_free(zram->mem_pool, handle); return -ENOMEM; } - *out_handle = handle; - *out_comp_len = comp_len; - return 0; -} - -static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index) -{ - int ret; - unsigned long handle; - unsigned int comp_len; - void *src, *dst; - struct zcomp_strm *zstrm; - struct page *page = bvec->bv_page; - - if (zram_same_page_write(zram, index, page)) - return 0; - - zstrm = zcomp_stream_get(zram->comp); - ret = zram_compress(zram, &zstrm, page, &handle, &comp_len); - if (ret) { - zcomp_stream_put(zram->comp); - return ret; - } - dst = zs_map_object(zram->mem_pool, handle, ZS_MM_WO); src = zstrm->buffer; @@ -712,25 +1059,31 @@ static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index) zcomp_stream_put(zram->comp); zs_unmap_object(zram->mem_pool, handle); - + atomic64_add(comp_len, &zram->stats.compr_data_size); +out: /* * Free memory associated with this sector * before overwriting unused sectors. */ zram_slot_lock(zram, index); zram_free_page(zram, index); - zram_set_handle(zram, index, handle); - zram_set_obj_size(zram, index, comp_len); + + if (flags) { + zram_set_flag(zram, index, flags); + zram_set_element(zram, index, element); + } else { + zram_set_handle(zram, index, handle); + zram_set_obj_size(zram, index, comp_len); + } zram_slot_unlock(zram, index); /* Update stats */ - atomic64_add(comp_len, &zram->stats.compr_data_size); atomic64_inc(&zram->stats.pages_stored); - return 0; + return ret; } static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, - u32 index, int offset) + u32 index, int offset, struct bio *bio) { int ret; struct page *page = NULL; @@ -748,7 +1101,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, if (!page) return -ENOMEM; - ret = zram_decompress_page(zram, page, index); + ret = __zram_bvec_read(zram, page, index, bio, true); if (ret) goto out; @@ -763,7 +1116,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, vec.bv_offset = 0; } - ret = __zram_bvec_write(zram, &vec, index); + ret = __zram_bvec_write(zram, &vec, index, bio); out: if (is_partial_io(bvec)) __free_page(page); @@ -808,28 +1161,34 @@ static void zram_bio_discard(struct zram *zram, u32 index, } } +/* + * Returns errno if it has some problem. Otherwise return 0 or 1. + * Returns 0 if IO request was done synchronously + * Returns 1 if IO request was successfully submitted. + */ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, - int offset, bool is_write) + int offset, bool is_write, struct bio *bio) { unsigned long start_time = jiffies; int rw_acct = is_write ? REQ_OP_WRITE : REQ_OP_READ; + struct request_queue *q = zram->disk->queue; int ret; - generic_start_io_acct(rw_acct, bvec->bv_len >> SECTOR_SHIFT, + generic_start_io_acct(q, rw_acct, bvec->bv_len >> SECTOR_SHIFT, &zram->disk->part0); if (!is_write) { atomic64_inc(&zram->stats.num_reads); - ret = zram_bvec_read(zram, bvec, index, offset); + ret = zram_bvec_read(zram, bvec, index, offset, bio); flush_dcache_page(bvec->bv_page); } else { atomic64_inc(&zram->stats.num_writes); - ret = zram_bvec_write(zram, bvec, index, offset); + ret = zram_bvec_write(zram, bvec, index, offset, bio); } - generic_end_io_acct(rw_acct, &zram->disk->part0, start_time); + generic_end_io_acct(q, rw_acct, &zram->disk->part0, start_time); - if (unlikely(ret)) { + if (unlikely(ret < 0)) { if (!is_write) atomic64_inc(&zram->stats.failed_reads); else @@ -868,7 +1227,7 @@ static void __zram_make_request(struct zram *zram, struct bio *bio) bv.bv_len = min_t(unsigned int, PAGE_SIZE - offset, unwritten); if (zram_bvec_rw(zram, &bv, index, offset, - op_is_write(bio_op(bio))) < 0) + op_is_write(bio_op(bio)), bio) < 0) goto out; bv.bv_offset += bv.bv_len; @@ -922,16 +1281,18 @@ static void zram_slot_free_notify(struct block_device *bdev, static int zram_rw_page(struct block_device *bdev, sector_t sector, struct page *page, bool is_write) { - int offset, err = -EIO; + int offset, ret; u32 index; struct zram *zram; struct bio_vec bv; + if (PageTransHuge(page)) + return -ENOTSUPP; zram = bdev->bd_disk->private_data; if (!valid_io_request(zram, sector, PAGE_SIZE)) { atomic64_inc(&zram->stats.invalid_io); - err = -EINVAL; + ret = -EINVAL; goto out; } @@ -942,7 +1303,7 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector, bv.bv_len = PAGE_SIZE; bv.bv_offset = 0; - err = zram_bvec_rw(zram, &bv, index, offset, is_write); + ret = zram_bvec_rw(zram, &bv, index, offset, is_write, NULL); out: /* * If I/O fails, just return error(ie, non-zero) without @@ -952,9 +1313,20 @@ out: * bio->bi_end_io does things to handle the error * (e.g., SetPageError, set_page_dirty and extra works). */ - if (err == 0) + if (unlikely(ret < 0)) + return ret; + + switch (ret) { + case 0: page_endio(page, is_write, 0); - return err; + break; + case 1: + ret = 0; + break; + default: + WARN_ON(1); + } + return ret; } static void zram_reset_device(struct zram *zram) @@ -983,6 +1355,7 @@ static void zram_reset_device(struct zram *zram) zram_meta_free(zram, disksize); memset(&zram->stats, 0, sizeof(zram->stats)); zcomp_destroy(comp); + reset_bdev(zram); } static ssize_t disksize_store(struct device *dev, @@ -1108,6 +1481,9 @@ static DEVICE_ATTR_WO(mem_limit); static DEVICE_ATTR_WO(mem_used_max); static DEVICE_ATTR_RW(max_comp_streams); static DEVICE_ATTR_RW(comp_algorithm); +#ifdef CONFIG_ZRAM_WRITEBACK +static DEVICE_ATTR_RW(backing_dev); +#endif static struct attribute *zram_disk_attrs[] = { &dev_attr_disksize.attr, @@ -1118,6 +1494,9 @@ static struct attribute *zram_disk_attrs[] = { &dev_attr_mem_used_max.attr, &dev_attr_max_comp_streams.attr, &dev_attr_comp_algorithm.attr, +#ifdef CONFIG_ZRAM_WRITEBACK + &dev_attr_backing_dev.attr, +#endif &dev_attr_io_stat.attr, &dev_attr_mm_stat.attr, &dev_attr_debug_stat.attr, diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h index e34e44d02e3e..31762db861e3 100644 --- a/drivers/block/zram/zram_drv.h +++ b/drivers/block/zram/zram_drv.h @@ -60,9 +60,10 @@ static const size_t max_zpage_size = PAGE_SIZE / 4 * 3; /* Flags for zram pages (table[page_no].value) */ enum zram_pageflags { - /* Page consists entirely of zeros */ + /* Page consists the same element */ ZRAM_SAME = ZRAM_FLAG_SHIFT, ZRAM_ACCESS, /* page is now accessed */ + ZRAM_WB, /* page is stored on backing_device */ __NR_ZRAM_PAGEFLAGS, }; @@ -115,5 +116,13 @@ struct zram { * zram is claimed so open request will be failed */ bool claim; /* Protected by bdev->bd_mutex */ +#ifdef CONFIG_ZRAM_WRITEBACK + struct file *backing_dev; + struct block_device *bdev; + unsigned int old_block_size; + unsigned long *bitmap; + unsigned long nr_pages; + spinlock_t bitmap_lock; +#endif }; #endif |
