diff options
Diffstat (limited to 'drivers/ieee1394/sbp2.c')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 2138 |
1 files changed, 0 insertions, 2138 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c deleted file mode 100644 index d6e251a300ce..000000000000 --- a/drivers/ieee1394/sbp2.c +++ /dev/null @@ -1,2138 +0,0 @@ -/* - * sbp2.c - SBP-2 protocol driver for IEEE-1394 - * - * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) - * jamesg@filanet.com (JSG) - * - * Copyright (C) 2003 Ben Collins <bcollins@debian.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * Brief Description: - * - * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 - * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level - * driver. It also registers as a SCSI lower-level driver in order to accept - * SCSI commands for transport using SBP-2. - * - * You may access any attached SBP-2 (usually storage devices) as regular - * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc.. - * - * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2 - * specification and for where to purchase the official standard. - * - * TODO: - * - look into possible improvements of the SCSI error handlers - * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size - * - handle Logical_Unit_Number.ordered - * - handle src == 1 in status blocks - * - reimplement the DMA mapping in absence of physical DMA so that - * bus_to_virt is no longer required - * - debug the handling of absent physical DMA - * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection - * (this is easy but depends on the previous two TODO items) - * - make the parameter serialize_io configurable per device - * - move all requests to fetch agent registers into non-atomic context, - * replace all usages of sbp2util_node_write_no_wait by true transactions - * Grep for inline FIXME comments below. - */ - -#include <linux/blkdev.h> -#include <linux/compiler.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/dma-mapping.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/stat.h> -#include <linux/string.h> -#include <linux/stringify.h> -#include <linux/types.h> -#include <linux/wait.h> -#include <linux/workqueue.h> -#include <linux/scatterlist.h> - -#include <asm/byteorder.h> -#include <asm/errno.h> -#include <asm/param.h> -#include <asm/system.h> -#include <asm/types.h> - -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA -#include <asm/io.h> /* for bus_to_virt */ -#endif - -#include <scsi/scsi.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_host.h> - -#include "csr1212.h" -#include "highlevel.h" -#include "hosts.h" -#include "ieee1394.h" -#include "ieee1394_core.h" -#include "ieee1394_hotplug.h" -#include "ieee1394_transactions.h" -#include "ieee1394_types.h" -#include "nodemgr.h" -#include "sbp2.h" - -/* - * Module load parameter definitions - */ - -/* - * Change max_speed on module load if you have a bad IEEE-1394 - * controller that has trouble running 2KB packets at 400mb. - * - * NOTE: On certain OHCI parts I have seen short packets on async transmit - * (probably due to PCI latency/throughput issues with the part). You can - * bump down the speed if you are running into problems. - */ -static int sbp2_max_speed = IEEE1394_SPEED_MAX; -module_param_named(max_speed, sbp2_max_speed, int, 0644); -MODULE_PARM_DESC(max_speed, "Limit data transfer speed (5 <= 3200, " - "4 <= 1600, 3 <= 800, 2 <= 400, 1 <= 200, 0 = 100 Mb/s)"); - -/* - * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs. - * This is and always has been buggy in multiple subtle ways. See above TODOs. - */ -static int sbp2_serialize_io = 1; -module_param_named(serialize_io, sbp2_serialize_io, bool, 0444); -MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers " - "(default = Y, faster but buggy = N)"); - -/* - * Adjust max_sectors if you'd like to influence how many sectors each SCSI - * command can transfer at most. Please note that some older SBP-2 bridge - * chips are broken for transfers greater or equal to 128KB, therefore - * max_sectors used to be a safe 255 sectors for many years. We now have a - * default of 0 here which means that we let the SCSI stack choose a limit. - * - * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds - * module parameter or in the sbp2_workarounds_table[], will override the - * value of max_sectors. We should use sbp2_workarounds_table[] to cover any - * bridge chip which becomes known to need the 255 sectors limit. - */ -static int sbp2_max_sectors; -module_param_named(max_sectors, sbp2_max_sectors, int, 0444); -MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " - "(default = 0 = use SCSI stack's default)"); - -/* - * Exclusive login to sbp2 device? In most cases, the sbp2 driver should - * do an exclusive login, as it's generally unsafe to have two hosts - * talking to a single sbp2 device at the same time (filesystem coherency, - * etc.). If you're running an sbp2 device that supports multiple logins, - * and you're either running read-only filesystems or some sort of special - * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster - * File System, or Lustre, then set exclusive_login to zero. - * - * So far only bridges from Oxford Semiconductor are known to support - * concurrent logins. Depending on firmware, four or two concurrent logins - * are possible on OXFW911 and newer Oxsemi bridges. - */ -static int sbp2_exclusive_login = 1; -module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644); -MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " - "(default = Y, use N for concurrent initiators)"); - -/* - * If any of the following workarounds is required for your device to work, - * please submit the kernel messages logged by sbp2 to the linux1394-devel - * mailing list. - * - * - 128kB max transfer - * Limit transfer size. Necessary for some old bridges. - * - * - 36 byte inquiry - * When scsi_mod probes the device, let the inquiry command look like that - * from MS Windows. - * - * - skip mode page 8 - * Suppress sending of mode_sense for mode page 8 if the device pretends to - * support the SCSI Primary Block commands instead of Reduced Block Commands. - * - * - fix capacity - * Tell sd_mod to correct the last sector number reported by read_capacity. - * Avoids access beyond actual disk limits on devices with an off-by-one bug. - * Don't use this with devices which don't have this bug. - * - * - delay inquiry - * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. - * - * - power condition - * Set the power condition field in the START STOP UNIT commands sent by - * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). - * Some disks need this to spin down or to resume properly. - * - * - override internal blacklist - * Instead of adding to the built-in blacklist, use only the workarounds - * specified in the module load parameter. - * Useful if a blacklist entry interfered with a non-broken device. - */ -static int sbp2_default_workarounds; -module_param_named(workarounds, sbp2_default_workarounds, int, 0644); -MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" - ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) - ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) - ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) - ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) - ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) - ", set power condition in start stop unit = " - __stringify(SBP2_WORKAROUND_POWER_CONDITION) - ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) - ", or a combination)"); - -/* - * This influences the format of the sysfs attribute - * /sys/bus/scsi/devices/.../ieee1394_id. - * - * The default format is like in older kernels: %016Lx:%d:%d - * It contains the target's EUI-64, a number given to the logical unit by - * the ieee1394 driver's nodemgr (starting at 0), and the LUN. - * - * The long format is: %016Lx:%06x:%04x - * It contains the target's EUI-64, the unit directory's directory_ID as per - * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the - * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI - * Architecture Model) rev.2 to 4 annex A. Therefore and because it is - * independent of the implementation of the ieee1394 nodemgr, the longer format - * is recommended for future use. - */ -static int sbp2_long_sysfs_ieee1394_id; -module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644); -MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs " - "(default = backwards-compatible = N, SAM-conforming = Y)"); - - -#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) -#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) - -/* - * Globals - */ -static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); -static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, - void (*)(struct scsi_cmnd *)); -static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); -static int sbp2_start_device(struct sbp2_lu *); -static void sbp2_remove_device(struct sbp2_lu *); -static int sbp2_login_device(struct sbp2_lu *); -static int sbp2_reconnect_device(struct sbp2_lu *); -static int sbp2_logout_device(struct sbp2_lu *); -static void sbp2_host_reset(struct hpsb_host *); -static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, - u64, size_t, u16); -static int sbp2_agent_reset(struct sbp2_lu *, int); -static void sbp2_parse_unit_directory(struct sbp2_lu *, - struct unit_directory *); -static int sbp2_set_busy_timeout(struct sbp2_lu *); -static int sbp2_max_speed_and_size(struct sbp2_lu *); - - -static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xa, 0xa, 0xa }; - -static DEFINE_RWLOCK(sbp2_hi_logical_units_lock); - -static struct hpsb_highlevel sbp2_highlevel = { - .name = SBP2_DEVICE_NAME, - .host_reset = sbp2_host_reset, -}; - -static const struct hpsb_address_ops sbp2_ops = { - .write = sbp2_handle_status_write -}; - -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA -static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, - u64, size_t, u16); -static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, - size_t, u16); - -static const struct hpsb_address_ops sbp2_physdma_ops = { - .read = sbp2_handle_physdma_read, - .write = sbp2_handle_physdma_write, -}; -#endif - - -/* - * Interface to driver core and IEEE 1394 core - */ -static const struct ieee1394_device_id sbp2_id_table[] = { - { - .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, - .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, - .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, - {} -}; -MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); - -static int sbp2_probe(struct device *); -static int sbp2_remove(struct device *); -static int sbp2_update(struct unit_directory *); - -static struct hpsb_protocol_driver sbp2_driver = { - .name = SBP2_DEVICE_NAME, - .id_table = sbp2_id_table, - .update = sbp2_update, - .driver = { - .probe = sbp2_probe, - .remove = sbp2_remove, - }, -}; - - -/* - * Interface to SCSI core - */ -static int sbp2scsi_queuecommand(struct scsi_cmnd *, - void (*)(struct scsi_cmnd *)); -static int sbp2scsi_abort(struct scsi_cmnd *); -static int sbp2scsi_reset(struct scsi_cmnd *); -static int sbp2scsi_slave_alloc(struct scsi_device *); -static int sbp2scsi_slave_configure(struct scsi_device *); -static void sbp2scsi_slave_destroy(struct scsi_device *); -static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, - struct device_attribute *, char *); - -static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); - -static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { - &dev_attr_ieee1394_id, - NULL -}; - -static struct scsi_host_template sbp2_shost_template = { - .module = THIS_MODULE, - .name = "SBP-2 IEEE-1394", - .proc_name = SBP2_DEVICE_NAME, - .queuecommand = sbp2scsi_queuecommand, - .eh_abort_handler = sbp2scsi_abort, - .eh_device_reset_handler = sbp2scsi_reset, - .slave_alloc = sbp2scsi_slave_alloc, - .slave_configure = sbp2scsi_slave_configure, - .slave_destroy = sbp2scsi_slave_destroy, - .this_id = -1, - .sg_tablesize = SG_ALL, - .use_clustering = ENABLE_CLUSTERING, - .cmd_per_lun = SBP2_MAX_CMDS, - .can_queue = SBP2_MAX_CMDS, - .sdev_attrs = sbp2_sysfs_sdev_attrs, -}; - -#define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ -#define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ - -/* - * List of devices with known bugs. - * - * The firmware_revision field, masked with 0xffff00, is the best indicator - * for the type of bridge chip of a device. It yields a few false positives - * but this did not break correctly behaving devices so far. - */ -static const struct { - u32 firmware_revision; - u32 model; - unsigned workarounds; -} sbp2_workarounds_table[] = { - /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { - .firmware_revision = 0x002800, - .model = 0x001010, - .workarounds = SBP2_WORKAROUND_INQUIRY_36 | - SBP2_WORKAROUND_MODE_SENSE_8 | - SBP2_WORKAROUND_POWER_CONDITION, - }, - /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { - .firmware_revision = 0x002800, - .model = 0x000000, - .workarounds = SBP2_WORKAROUND_POWER_CONDITION, - }, - /* Initio bridges, actually only needed for some older ones */ { - .firmware_revision = 0x000200, - .model = SBP2_ROM_VALUE_WILDCARD, - .workarounds = SBP2_WORKAROUND_INQUIRY_36, - }, - /* PL-3507 bridge with Prolific firmware */ { - .firmware_revision = 0x012800, - .model = SBP2_ROM_VALUE_WILDCARD, - .workarounds = SBP2_WORKAROUND_POWER_CONDITION, - }, - /* Symbios bridge */ { - .firmware_revision = 0xa0b800, - .model = SBP2_ROM_VALUE_WILDCARD, - .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, - }, - /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { - .firmware_revision = 0x002600, - .model = SBP2_ROM_VALUE_WILDCARD, - .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, - }, - /* - * iPod 2nd generation: needs 128k max transfer size workaround - * iPod 3rd generation: needs fix capacity workaround - */ - { - .firmware_revision = 0x0a2700, - .model = 0x000000, - .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | - SBP2_WORKAROUND_FIX_CAPACITY, - }, - /* iPod 4th generation */ { - .firmware_revision = 0x0a2700, - .model = 0x000021, - .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, - }, - /* iPod mini */ { - .firmware_revision = 0x0a2700, - .model = 0x000022, - .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, - }, - /* iPod mini */ { - .firmware_revision = 0x0a2700, - .model = 0x000023, - .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, - }, - /* iPod Photo */ { - .firmware_revision = 0x0a2700, - .model = 0x00007e, - .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, - } -}; - -/************************************** - * General utility functions - **************************************/ - -#ifndef __BIG_ENDIAN -/* - * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. - */ -static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) -{ - u32 *temp = buffer; - - for (length = (length >> 2); length--; ) - temp[length] = be32_to_cpu(temp[length]); -} - -/* - * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. - */ -static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) -{ - u32 *temp = buffer; - - for (length = (length >> 2); length--; ) - temp[length] = cpu_to_be32(temp[length]); -} -#else /* BIG_ENDIAN */ -/* Why waste the cpu cycles? */ -#define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) -#define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) -#endif - -static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); - -/* - * Waits for completion of an SBP-2 access request. - * Returns nonzero if timed out or prematurely interrupted. - */ -static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) -{ - long leftover; - - leftover = wait_event_interruptible_timeout( - sbp2_access_wq, lu->access_complete, timeout); - lu->access_complete = 0; - return leftover <= 0; -} - -static void sbp2_free_packet(void *packet) -{ - hpsb_free_tlabel(packet); - hpsb_free_packet(packet); -} - -/* - * This is much like hpsb_node_write(), except it ignores the response - * subaction and returns immediately. Can be used from atomic context. - */ -static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, - quadlet_t *buf, size_t len) -{ - struct hpsb_packet *packet; - - packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); - if (!packet) - return -ENOMEM; - - hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); - hpsb_node_fill_packet(ne, packet); - if (hpsb_send_packet(packet) < 0) { - sbp2_free_packet(packet); - return -EIO; - } - return 0; -} - -static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, - quadlet_t *data, size_t len) -{ - /* There is a small window after a bus reset within which the node - * entry's generation is current but the reconnect wasn't completed. */ - if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) - return; - - if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, - data, len)) - SBP2_ERR("sbp2util_notify_fetch_agent failed."); - - /* Now accept new SCSI commands, unless a bus reset happended during - * hpsb_node_write. */ - if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) - scsi_unblock_requests(lu->shost); -} - -static void sbp2util_write_orb_pointer(struct work_struct *work) -{ - struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); - quadlet_t data[2]; - - data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id); - data[1] = lu->last_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8); -} - -static void sbp2util_write_doorbell(struct work_struct *work) -{ - struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); - - sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4); -} - -static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) -{ - struct sbp2_command_info *cmd; - struct device *dmadev = lu->hi->host->device.parent; - int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; - - for (i = 0; i < orbs; i++) { - cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); - if (!cmd) - goto failed_alloc; - - cmd->command_orb_dma = - dma_map_single(dmadev, &cmd->command_orb, - sizeof(struct sbp2_command_orb), - DMA_TO_DEVICE); - if (dma_mapping_error(dmadev, cmd->command_orb_dma)) - goto failed_orb; - - cmd->sge_dma = - dma_map_single(dmadev, &cmd->scatter_gather_element, - sizeof(cmd->scatter_gather_element), - DMA_TO_DEVICE); - if (dma_mapping_error(dmadev, cmd->sge_dma)) - goto failed_sge; - - INIT_LIST_HEAD(&cmd->list); - list_add_tail(&cmd->list, &lu->cmd_orb_completed); - } - return 0; - -failed_sge: - dma_unmap_single(dmadev, cmd->command_orb_dma, - sizeof(struct sbp2_command_orb), DMA_TO_DEVICE); -failed_orb: - kfree(cmd); -failed_alloc: - return -ENOMEM; -} - -static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu, - struct hpsb_host *host) -{ - struct list_head *lh, *next; - struct sbp2_command_info *cmd; - unsigned long flags; - - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - if (!list_empty(&lu->cmd_orb_completed)) - list_for_each_safe(lh, next, &lu->cmd_orb_completed) { - cmd = list_entry(lh, struct sbp2_command_info, list); - dma_unmap_single(host->device.parent, - cmd->command_orb_dma, - sizeof(struct sbp2_command_orb), - DMA_TO_DEVICE); - dma_unmap_single(host->device.parent, cmd->sge_dma, - sizeof(cmd->scatter_gather_element), - DMA_TO_DEVICE); - kfree(cmd); - } - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - return; -} - -/* - * Finds the sbp2_command for a given outstanding command ORB. - * Only looks at the in-use list. - */ -static struct sbp2_command_info *sbp2util_find_command_for_orb( - struct sbp2_lu *lu, dma_addr_t orb) -{ - struct sbp2_command_info *cmd; - unsigned long flags; - - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - if (!list_empty(&lu->cmd_orb_inuse)) - list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) - if (cmd->command_orb_dma == orb) { - spin_unlock_irqrestore( - &lu->cmd_orb_lock, flags); - return cmd; - } - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - return NULL; -} - -/* - * Finds the sbp2_command for a given outstanding SCpnt. - * Only looks at the in-use list. - * Must be called with lu->cmd_orb_lock held. - */ -static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( - struct sbp2_lu *lu, void *SCpnt) -{ - struct sbp2_command_info *cmd; - - if (!list_empty(&lu->cmd_orb_inuse)) - list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) - if (cmd->Current_SCpnt == SCpnt) - return cmd; - return NULL; -} - -static struct sbp2_command_info *sbp2util_allocate_command_orb( - struct sbp2_lu *lu, - struct scsi_cmnd *Current_SCpnt, - void (*Current_done)(struct scsi_cmnd *)) -{ - struct list_head *lh; - struct sbp2_command_info *cmd = NULL; - unsigned long flags; - - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - if (!list_empty(&lu->cmd_orb_completed)) { - lh = lu->cmd_orb_completed.next; - list_del(lh); - cmd = list_entry(lh, struct sbp2_command_info, list); - cmd->Current_done = Current_done; - cmd->Current_SCpnt = Current_SCpnt; - list_add_tail(&cmd->list, &lu->cmd_orb_inuse); - } else - SBP2_ERR("%s: no orbs available", __func__); - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - return cmd; -} - -/* - * Unmaps the DMAs of a command and moves the command to the completed ORB list. - * Must be called with lu->cmd_orb_lock held. - */ -static void sbp2util_mark_command_completed(struct sbp2_lu *lu, - struct sbp2_command_info *cmd) -{ - if (scsi_sg_count(cmd->Current_SCpnt)) - dma_unmap_sg(lu->ud->ne->host->device.parent, - scsi_sglist(cmd->Current_SCpnt), - scsi_sg_count(cmd->Current_SCpnt), - cmd->Current_SCpnt->sc_data_direction); - list_move_tail(&cmd->list, &lu->cmd_orb_completed); -} - -/* - * Is lu valid? Is the 1394 node still present? - */ -static inline int sbp2util_node_is_available(struct sbp2_lu *lu) -{ - return lu && lu->ne && !lu->ne->in_limbo; -} - -/********************************************* - * IEEE-1394 core driver stack related section - *********************************************/ - -static int sbp2_probe(struct device *dev) -{ - struct unit_directory *ud; - struct sbp2_lu *lu; - - ud = container_of(dev, struct unit_directory, device); - - /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) - * instead. */ - if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) - return -ENODEV; - - lu = sbp2_alloc_device(ud); - if (!lu) - return -ENOMEM; - - sbp2_parse_unit_directory(lu, ud); - return sbp2_start_device(lu); -} - -static int sbp2_remove(struct device *dev) -{ - struct unit_directory *ud; - struct sbp2_lu *lu; - struct scsi_device *sdev; - - ud = container_of(dev, struct unit_directory, device); - lu = dev_get_drvdata(&ud->device); - if (!lu) - return 0; - - if (lu->shost) { - /* Get rid of enqueued commands if there is no chance to - * send them. */ - if (!sbp2util_node_is_available(lu)) - sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); - /* scsi_remove_device() may trigger shutdown functions of SCSI - * highlevel drivers which would deadlock if blocked. */ - atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); - scsi_unblock_requests(lu->shost); - } - sdev = lu->sdev; - if (sdev) { - lu->sdev = NULL; - scsi_remove_device(sdev); - } - - sbp2_logout_device(lu); - sbp2_remove_device(lu); - - return 0; -} - -static int sbp2_update(struct unit_directory *ud) -{ - struct sbp2_lu *lu = dev_get_drvdata(&ud->device); - - if (sbp2_reconnect_device(lu) != 0) { - /* - * Reconnect failed. If another bus reset happened, - * let nodemgr proceed and call sbp2_update again later - * (or sbp2_remove if this node went away). - */ - if (!hpsb_node_entry_valid(lu->ne)) - return 0; - /* - * Or the target rejected the reconnect because we weren't - * fast enough. Try a regular login, but first log out - * just in case of any weirdness. - */ - sbp2_logout_device(lu); - - if (sbp2_login_device(lu) != 0) { - if (!hpsb_node_entry_valid(lu->ne)) - return 0; - - /* Maybe another initiator won the login. */ - SBP2_ERR("Failed to reconnect to sbp2 device!"); - return -EBUSY; - } - } - - sbp2_set_busy_timeout(lu); - sbp2_agent_reset(lu, 1); - sbp2_max_speed_and_size(lu); - - /* Complete any pending commands with busy (so they get retried) - * and remove them from our queue. */ - sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); - - /* Accept new commands unless there was another bus reset in the - * meantime. */ - if (hpsb_node_entry_valid(lu->ne)) { - atomic_set(&lu->state, SBP2LU_STATE_RUNNING); - scsi_unblock_requests(lu->shost); - } - return 0; -} - -static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) -{ - struct sbp2_fwhost_info *hi; - struct Scsi_Host *shost = NULL; - struct sbp2_lu *lu = NULL; - unsigned long flags; - - lu = kzalloc(sizeof(*lu), GFP_KERNEL); - if (!lu) { - SBP2_ERR("failed to create lu"); - goto failed_alloc; - } - - lu->ne = ud->ne; - lu->ud = ud; - lu->speed_code = IEEE1394_SPEED_100; - lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; - lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; - INIT_LIST_HEAD(&lu->cmd_orb_inuse); - INIT_LIST_HEAD(&lu->cmd_orb_completed); - INIT_LIST_HEAD(&lu->lu_list); - spin_lock_init(&lu->cmd_orb_lock); - atomic_set(&lu->state, SBP2LU_STATE_RUNNING); - INIT_WORK(&lu->protocol_work, NULL); - - dev_set_drvdata(&ud->device, lu); - - hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); - if (!hi) { - hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, - sizeof(*hi)); - if (!hi) { - SBP2_ERR("failed to allocate hostinfo"); - goto failed_alloc; - } - hi->host = ud->ne->host; - INIT_LIST_HEAD(&hi->logical_units); - -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA - /* Handle data movement if physical dma is not - * enabled or not supported on host controller */ - if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, - &sbp2_physdma_ops, - 0x0ULL, 0xfffffffcULL)) { - SBP2_ERR("failed to register lower 4GB address range"); - goto failed_alloc; - } -#endif - } - - if (dma_get_max_seg_size(hi->host->device.parent) > SBP2_MAX_SEG_SIZE) - BUG_ON(dma_set_max_seg_size(hi->host->device.parent, - SBP2_MAX_SEG_SIZE)); - - /* Prevent unloading of the 1394 host */ - if (!try_module_get(hi->host->driver->owner)) { - SBP2_ERR("failed to get a reference on 1394 host driver"); - goto failed_alloc; - } - - lu->hi = hi; - - write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); - list_add_tail(&lu->lu_list, &hi->logical_units); - write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); - - /* Register the status FIFO address range. We could use the same FIFO - * for targets at different nodes. However we need different FIFOs per - * target in order to support multi-unit devices. - * The FIFO is located out of the local host controller's physical range - * but, if possible, within the posted write area. Status writes will - * then be performed as unified transactions. This slightly reduces - * bandwidth usage, and some Prolific based devices seem to require it. - */ - lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( - &sbp2_highlevel, ud->ne->host, &sbp2_ops, - sizeof(struct sbp2_status_block), sizeof(quadlet_t), - ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); - if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { - SBP2_ERR("failed to allocate status FIFO address range"); - goto failed_alloc; - } - - shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); - if (!shost) { - SBP2_ERR("failed to register scsi host"); - goto failed_alloc; - } - - shost->hostdata[0] = (unsigned long)lu; - shost->max_cmd_len = SBP2_MAX_CDB_SIZE; - - if (!scsi_add_host(shost, &ud->device)) { - lu->shost = shost; - return lu; - } - - SBP2_ERR("failed to add scsi host"); - scsi_host_put(shost); - -failed_alloc: - sbp2_remove_device(lu); - return NULL; -} - -static void sbp2_host_reset(struct hpsb_host *host) -{ - struct sbp2_fwhost_info *hi; - struct sbp2_lu *lu; - unsigned long flags; - - hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - if (!hi) - return; - - read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); - - list_for_each_entry(lu, &hi->logical_units, lu_list) - if (atomic_cmpxchg(&lu->state, - SBP2LU_STATE_RUNNING, SBP2LU_STATE_IN_RESET) - == SBP2LU_STATE_RUNNING) - scsi_block_requests(lu->shost); - - read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); -} - -static int sbp2_start_device(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi = lu->hi; - int error; - - lu->login_response = dma_alloc_coherent(hi->host->device.parent, - sizeof(struct sbp2_login_response), - &lu->login_response_dma, GFP_KERNEL); - if (!lu->login_response) - goto alloc_fail; - - lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent, - sizeof(struct sbp2_query_logins_orb), - &lu->query_logins_orb_dma, GFP_KERNEL); - if (!lu->query_logins_orb) - goto alloc_fail; - - lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent, - sizeof(struct sbp2_query_logins_response), - &lu->query_logins_response_dma, GFP_KERNEL); - if (!lu->query_logins_response) - goto alloc_fail; - - lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent, - sizeof(struct sbp2_reconnect_orb), - &lu->reconnect_orb_dma, GFP_KERNEL); - if (!lu->reconnect_orb) - goto alloc_fail; - - lu->logout_orb = dma_alloc_coherent(hi->host->device.parent, - sizeof(struct sbp2_logout_orb), - &lu->logout_orb_dma, GFP_KERNEL); - if (!lu->logout_orb) - goto alloc_fail; - - lu->login_orb = dma_alloc_coherent(hi->host->device.parent, - sizeof(struct sbp2_login_orb), - &lu->login_orb_dma, GFP_KERNEL); - if (!lu->login_orb) - goto alloc_fail; - - if (sbp2util_create_command_orb_pool(lu)) - goto alloc_fail; - - /* Wait a second before trying to log in. Previously logged in - * initiators need a chance to reconnect. */ - if (msleep_interruptible(1000)) { - sbp2_remove_device(lu); - return -EINTR; - } - - if (sbp2_login_device(lu)) { - sbp2_remove_device(lu); - return -EBUSY; - } - - sbp2_set_busy_timeout(lu); - sbp2_agent_reset(lu, 1); - sbp2_max_speed_and_size(lu); - - if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) - ssleep(SBP2_INQUIRY_DELAY); - - error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); - if (error) { - SBP2_ERR("scsi_add_device failed"); - sbp2_logout_device(lu); - sbp2_remove_device(lu); - return error; - } - - return 0; - -alloc_fail: - SBP2_ERR("Could not allocate memory for lu"); - sbp2_remove_device(lu); - return -ENOMEM; -} - -static void sbp2_remove_device(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi; - unsigned long flags; - - if (!lu) - return; - hi = lu->hi; - if (!hi) - goto no_hi; - - if (lu->shost) { - scsi_remove_host(lu->shost); - scsi_host_put(lu->shost); - } - flush_scheduled_work(); - sbp2util_remove_command_orb_pool(lu, hi->host); - - write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); - list_del(&lu->lu_list); - write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); - - if (lu->login_response) - dma_free_coherent(hi->host->device.parent, - sizeof(struct sbp2_login_response), - lu->login_response, - lu->login_response_dma); - if (lu->login_orb) - dma_free_coherent(hi->host->device.parent, - sizeof(struct sbp2_login_orb), - lu->login_orb, - lu->login_orb_dma); - if (lu->reconnect_orb) - dma_free_coherent(hi->host->device.parent, - sizeof(struct sbp2_reconnect_orb), - lu->reconnect_orb, - lu->reconnect_orb_dma); - if (lu->logout_orb) - dma_free_coherent(hi->host->device.parent, - sizeof(struct sbp2_logout_orb), - lu->logout_orb, - lu->logout_orb_dma); - if (lu->query_logins_orb) - dma_free_coherent(hi->host->device.parent, - sizeof(struct sbp2_query_logins_orb), - lu->query_logins_orb, - lu->query_logins_orb_dma); - if (lu->query_logins_response) - dma_free_coherent(hi->host->device.parent, - sizeof(struct sbp2_query_logins_response), - lu->query_logins_response, - lu->query_logins_response_dma); - - if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) - hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, - lu->status_fifo_addr); - - dev_set_drvdata(&lu->ud->device, NULL); - - module_put(hi->host->driver->owner); -no_hi: - kfree(lu); -} - -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA -/* - * Deal with write requests on adapters which do not support physical DMA or - * have it switched off. - */ -static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, - int destid, quadlet_t *data, u64 addr, - size_t length, u16 flags) -{ - memcpy(bus_to_virt((u32) addr), data, length); - return RCODE_COMPLETE; -} - -/* - * Deal with read requests on adapters which do not support physical DMA or - * have it switched off. - */ -static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, - quadlet_t *data, u64 addr, size_t length, - u16 flags) -{ - memcpy(data, bus_to_virt((u32) addr), length); - return RCODE_COMPLETE; -} -#endif - -/************************************** - * SBP-2 protocol related section - **************************************/ - -static int sbp2_query_logins(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi = lu->hi; - quadlet_t data[2]; - int max_logins; - int active_logins; - - lu->query_logins_orb->reserved1 = 0x0; - lu->query_logins_orb->reserved2 = 0x0; - - lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; - lu->query_logins_orb->query_response_hi = - ORB_SET_NODE_ID(hi->host->node_id); - lu->query_logins_orb->lun_misc = - ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); - lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); - lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); - - lu->query_logins_orb->reserved_resp_length = - ORB_SET_QUERY_LOGINS_RESP_LENGTH( - sizeof(struct sbp2_query_logins_response)); - - lu->query_logins_orb->status_fifo_hi = - ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); - lu->query_logins_orb->status_fifo_lo = - ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); - - sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, - sizeof(struct sbp2_query_logins_orb)); - - memset(lu->query_logins_response, 0, - sizeof(struct sbp2_query_logins_response)); - - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = lu->query_logins_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); - - if (sbp2util_access_timeout(lu, 2*HZ)) { - SBP2_INFO("Error querying logins to SBP-2 device - timed out"); - return -EIO; - } - - if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { - SBP2_INFO("Error querying logins to SBP-2 device - timed out"); - return -EIO; - } - - if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { - SBP2_INFO("Error querying logins to SBP-2 device - failed"); - return -EIO; - } - - sbp2util_cpu_to_be32_buffer(lu->query_logins_response, - sizeof(struct sbp2_query_logins_response)); - - max_logins = RESPONSE_GET_MAX_LOGINS( - lu->query_logins_response->length_max_logins); - SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); - - active_logins = RESPONSE_GET_ACTIVE_LOGINS( - lu->query_logins_response->length_max_logins); - SBP2_INFO("Number of active logins: %d", active_logins); - - if (active_logins >= max_logins) { - return -EIO; - } - - return 0; -} - -static int sbp2_login_device(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi = lu->hi; - quadlet_t data[2]; - - if (!lu->login_orb) - return -EIO; - - if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { - SBP2_INFO("Device does not support any more concurrent logins"); - return -EIO; - } - - /* assume no password */ - lu->login_orb->password_hi = 0; - lu->login_orb->password_lo = 0; - - lu->login_orb->login_response_lo = lu->login_response_dma; - lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); - lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); - - /* one second reconnect time */ - lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); - lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); - lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); - lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); - - lu->login_orb->passwd_resp_lengths = - ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); - - lu->login_orb->status_fifo_hi = - ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); - lu->login_orb->status_fifo_lo = - ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); - - sbp2util_cpu_to_be32_buffer(lu->login_orb, - sizeof(struct sbp2_login_orb)); - - memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); - - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = lu->login_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); - - /* wait up to 20 seconds for login status */ - if (sbp2util_access_timeout(lu, 20*HZ)) { - SBP2_ERR("Error logging into SBP-2 device - timed out"); - return -EIO; - } - - /* make sure that the returned status matches the login ORB */ - if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { - SBP2_ERR("Error logging into SBP-2 device - timed out"); - return -EIO; - } - - if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { - SBP2_ERR("Error logging into SBP-2 device - failed"); - return -EIO; - } - - sbp2util_cpu_to_be32_buffer(lu->login_response, - sizeof(struct sbp2_login_response)); - lu->command_block_agent_addr = - ((u64)lu->login_response->command_block_agent_hi) << 32; - lu->command_block_agent_addr |= - ((u64)lu->login_response->command_block_agent_lo); - lu->command_block_agent_addr &= 0x0000ffffffffffffULL; - - SBP2_INFO("Logged into SBP-2 device"); - return 0; -} - -static int sbp2_logout_device(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi = lu->hi; - quadlet_t data[2]; - int error; - - lu->logout_orb->reserved1 = 0x0; - lu->logout_orb->reserved2 = 0x0; - lu->logout_orb->reserved3 = 0x0; - lu->logout_orb->reserved4 = 0x0; - - lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); - lu->logout_orb->login_ID_misc |= - ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); - lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); - - lu->logout_orb->reserved5 = 0x0; - lu->logout_orb->status_fifo_hi = - ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); - lu->logout_orb->status_fifo_lo = - ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); - - sbp2util_cpu_to_be32_buffer(lu->logout_orb, - sizeof(struct sbp2_logout_orb)); - - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = lu->logout_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); - if (error) - return error; - - /* wait up to 1 second for the device to complete logout */ - if (sbp2util_access_timeout(lu, HZ)) - return -EIO; - - SBP2_INFO("Logged out of SBP-2 device"); - return 0; -} - -static int sbp2_reconnect_device(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi = lu->hi; - quadlet_t data[2]; - int error; - - lu->reconnect_orb->reserved1 = 0x0; - lu->reconnect_orb->reserved2 = 0x0; - lu->reconnect_orb->reserved3 = 0x0; - lu->reconnect_orb->reserved4 = 0x0; - - lu->reconnect_orb->login_ID_misc = - ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); - lu->reconnect_orb->login_ID_misc |= - ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); - lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); - - lu->reconnect_orb->reserved5 = 0x0; - lu->reconnect_orb->status_fifo_hi = - ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); - lu->reconnect_orb->status_fifo_lo = - ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); - - sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, - sizeof(struct sbp2_reconnect_orb)); - - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = lu->reconnect_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); - if (error) - return error; - - /* wait up to 1 second for reconnect status */ - if (sbp2util_access_timeout(lu, HZ)) { - SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); - return -EIO; - } - - /* make sure that the returned status matches the reconnect ORB */ - if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { - SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); - return -EIO; - } - - if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { - SBP2_ERR("Error reconnecting to SBP-2 device - failed"); - return -EIO; - } - - SBP2_INFO("Reconnected to SBP-2 device"); - return 0; -} - -/* - * Set the target node's Single Phase Retry limit. Affects the target's retry - * behaviour if our node is too busy to accept requests. - */ -static int sbp2_set_busy_timeout(struct sbp2_lu *lu) -{ - quadlet_t data; - - data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); - if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) - SBP2_ERR("%s error", __func__); - return 0; -} - -static void sbp2_parse_unit_directory(struct sbp2_lu *lu, - struct unit_directory *ud) -{ - struct csr1212_keyval *kv; - struct csr1212_dentry *dentry; - u64 management_agent_addr; - u32 firmware_revision, model; - unsigned workarounds; - int i; - - management_agent_addr = 0; - firmware_revision = SBP2_ROM_VALUE_MISSING; - model = ud->flags & UNIT_DIRECTORY_MODEL_ID ? - ud->model_id : SBP2_ROM_VALUE_MISSING; - - csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { - switch (kv->key.id) { - case CSR1212_KV_ID_DEPENDENT_INFO: - if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) - management_agent_addr = - CSR1212_REGISTER_SPACE_BASE + - (kv->value.csr_offset << 2); - - else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) - lu->lun = ORB_SET_LUN(kv->value.immediate); - break; - - - case SBP2_FIRMWARE_REVISION_KEY: - firmware_revision = kv->value.immediate; - break; - - default: - /* FIXME: Check for SBP2_UNIT_CHARACTERISTICS_KEY - * mgt_ORB_timeout and ORB_size, SBP-2 clause 7.4.8. */ - - /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. - * Its "ordered" bit has consequences for command ORB - * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ - break; - } - } - - workarounds = sbp2_default_workarounds; - - if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) - for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { - if (sbp2_workarounds_table[i].firmware_revision != - SBP2_ROM_VALUE_WILDCARD && - sbp2_workarounds_table[i].firmware_revision != - (firmware_revision & 0xffff00)) - continue; - if (sbp2_workarounds_table[i].model != - SBP2_ROM_VALUE_WILDCARD && - sbp2_workarounds_table[i].model != model) - continue; - workarounds |= sbp2_workarounds_table[i].workarounds; - break; - } - - if (workarounds) - SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " - "(firmware_revision 0x%06x, vendor_id 0x%06x," - " model_id 0x%06x)", - NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), - workarounds, firmware_revision, ud->vendor_id, - model); - - /* We would need one SCSI host template for each target to adjust - * max_sectors on the fly, therefore warn only. */ - if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && - (sbp2_max_sectors * 512) > (128 * 1024)) - SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " - "max transfer size. WARNING: Current max_sectors " - "setting is larger than 128KB (%d sectors)", - NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), - sbp2_max_sectors); - - /* If this is a logical unit directory entry, process the parent - * to get the values. */ - if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { - struct unit_directory *parent_ud = container_of( - ud->device.parent, struct unit_directory, device); - sbp2_parse_unit_directory(lu, parent_ud); - } else { - lu->management_agent_addr = management_agent_addr; - lu->workarounds = workarounds; - if (ud->flags & UNIT_DIRECTORY_HAS_LUN) - lu->lun = ORB_SET_LUN(ud->lun); - } -} - -#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) - -/* - * This function is called in order to determine the max speed and packet - * size we can use in our ORBs. Note, that we (the driver and host) only - * initiate the transaction. The SBP-2 device actually transfers the data - * (by reading from the DMA area we tell it). This means that the SBP-2 - * device decides the actual maximum data it can transfer. We just tell it - * the speed that it needs to use, and the max_rec the host supports, and - * it takes care of the rest. - */ -static int sbp2_max_speed_and_size(struct sbp2_lu *lu) -{ - struct sbp2_fwhost_info *hi = lu->hi; - u8 payload; - - lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; - - if (lu->speed_code > sbp2_max_speed) { - lu->speed_code = sbp2_max_speed; - SBP2_INFO("Reducing speed to %s", - hpsb_speedto_str[sbp2_max_speed]); - } - - /* Payload size is the lesser of what our speed supports and what - * our host supports. */ - payload = min(sbp2_speedto_max_payload[lu->speed_code], - (u8) (hi->host->csr.max_rec - 1)); - - /* If physical DMA is off, work around limitation in ohci1394: - * packet size must not exceed PAGE_SIZE */ - if (lu->ne->host->low_addr_space < (1ULL << 32)) - while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && - payload) - payload--; - - SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", - NODE_BUS_ARGS(hi->host, lu->ne->nodeid), - hpsb_speedto_str[lu->speed_code], - SBP2_PAYLOAD_TO_BYTES(payload)); - - lu->max_payload_size = payload; - return 0; -} - -static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) -{ - quadlet_t data; - u64 addr; - int retval; - unsigned long flags; - - /* flush lu->protocol_work */ - if (wait) - flush_scheduled_work(); - - data = ntohl(SBP2_AGENT_RESET_DATA); - addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; - - if (wait) - retval = hpsb_node_write(lu->ne, addr, &data, 4); - else - retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); - - if (retval < 0) { - SBP2_ERR("hpsb_node_write failed.\n"); - return -EIO; - } - - /* make sure that the ORB_POINTER is written on next command */ - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - lu->last_orb = NULL; - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - - return 0; -} - -static int sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, - struct sbp2_fwhost_info *hi, - struct sbp2_command_info *cmd, - unsigned int sg_count, - struct scatterlist *sg, - u32 orb_direction, - enum dma_data_direction dma_dir) -{ - struct device *dmadev = hi->host->device.parent; - struct sbp2_unrestricted_page_table *pt; - int i, n; - - n = dma_map_sg(dmadev, sg, sg_count, dma_dir); - if (n == 0) - return -ENOMEM; - - orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - orb->misc |= ORB_SET_DIRECTION(orb_direction); - - /* special case if only one element (and less than 64KB in size) */ - if (n == 1) { - orb->misc |= ORB_SET_DATA_SIZE(sg_dma_len(sg)); - orb->data_descriptor_lo = sg_dma_address(sg); - } else { - pt = &cmd->scatter_gather_element[0]; - - dma_sync_single_for_cpu(dmadev, cmd->sge_dma, - sizeof(cmd->scatter_gather_element), - DMA_TO_DEVICE); - - for_each_sg(sg, sg, n, i) { - pt[i].high = cpu_to_be32(sg_dma_len(sg) << 16); - pt[i].low = cpu_to_be32(sg_dma_address(sg)); - } - - orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1) | - ORB_SET_DATA_SIZE(n); - orb->data_descriptor_lo = cmd->sge_dma; - - dma_sync_single_for_device(dmadev, cmd->sge_dma, - sizeof(cmd->scatter_gather_element), - DMA_TO_DEVICE); - } - return 0; -} - -static int sbp2_create_command_orb(struct sbp2_lu *lu, - struct sbp2_command_info *cmd, - struct scsi_cmnd *SCpnt) -{ - struct device *dmadev = lu->hi->host->device.parent; - struct sbp2_command_orb *orb = &cmd->command_orb; - unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt); - enum dma_data_direction dma_dir = SCpnt->sc_data_direction; - u32 orb_direction; - int ret; - - dma_sync_single_for_cpu(dmadev, cmd->command_orb_dma, - sizeof(struct sbp2_command_orb), DMA_TO_DEVICE); - /* - * Set-up our command ORB. - * - * NOTE: We're doing unrestricted page tables (s/g), as this is - * best performance (at least with the devices I have). This means - * that data_size becomes the number of s/g elements, and - * page_size should be zero (for unrestricted). - */ - orb->next_ORB_hi = ORB_SET_NULL_PTR(1); - orb->next_ORB_lo = 0x0; - orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); - orb->misc |= ORB_SET_SPEED(lu->speed_code); - orb->misc |= ORB_SET_NOTIFY(1); - - if (dma_dir == DMA_NONE) - orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; - else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) - orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; - else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) - orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; - else { - SBP2_INFO("Falling back to DMA_NONE"); - orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; - } - - /* set up our page table stuff */ - if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { - orb->data_descriptor_hi = 0x0; - orb->data_descriptor_lo = 0x0; - orb->misc |= ORB_SET_DIRECTION(1); - ret = 0; - } else { - ret = sbp2_prep_command_orb_sg(orb, lu->hi, cmd, - scsi_sg_count(SCpnt), - scsi_sglist(SCpnt), - orb_direction, dma_dir); - } - sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); - - memset(orb->cdb, 0, sizeof(orb->cdb)); - memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len); - - dma_sync_single_for_device(dmadev, cmd->command_orb_dma, - sizeof(struct sbp2_command_orb), DMA_TO_DEVICE); - return ret; -} - -static void sbp2_link_orb_command(struct sbp2_lu *lu, - struct sbp2_command_info *cmd) -{ - struct sbp2_fwhost_info *hi = lu->hi; - struct sbp2_command_orb *last_orb; - dma_addr_t last_orb_dma; - u64 addr = lu->command_block_agent_addr; - quadlet_t data[2]; - size_t length; - unsigned long flags; - - /* check to see if there are any previous orbs to use */ - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - last_orb = lu->last_orb; - last_orb_dma = lu->last_orb_dma; - if (!last_orb) { - /* - * last_orb == NULL means: We know that the target's fetch agent - * is not active right now. - */ - addr += SBP2_ORB_POINTER_OFFSET; - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = cmd->command_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - length = 8; - } else { - /* - * last_orb != NULL means: We know that the target's fetch agent - * is (very probably) not dead or in reset state right now. - * We have an ORB already sent that we can append a new one to. - * The target's fetch agent may or may not have read this - * previous ORB yet. - */ - dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma, - sizeof(struct sbp2_command_orb), - DMA_TO_DEVICE); - last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); - wmb(); - /* Tells hardware that this pointer is valid */ - last_orb->next_ORB_hi = 0; - dma_sync_single_for_device(hi->host->device.parent, - last_orb_dma, - sizeof(struct sbp2_command_orb), - DMA_TO_DEVICE); - addr += SBP2_DOORBELL_OFFSET; - data[0] = 0; - length = 4; - } - lu->last_orb = &cmd->command_orb; - lu->last_orb_dma = cmd->command_orb_dma; - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - - if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { - /* - * sbp2util_node_write_no_wait failed. We certainly ran out - * of transaction labels, perhaps just because there were no - * context switches which gave khpsbpkt a chance to collect - * free tlabels. Try again in non-atomic context. If necessary, - * the workqueue job will sleep to guaranteedly get a tlabel. - * We do not accept new commands until the job is over. - */ - scsi_block_requests(lu->shost); - PREPARE_WORK(&lu->protocol_work, - last_orb ? sbp2util_write_doorbell: - sbp2util_write_orb_pointer); - schedule_work(&lu->protocol_work); - } -} - -static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)) -{ - struct sbp2_command_info *cmd; - - cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); - if (!cmd) - return -EIO; - - if (sbp2_create_command_orb(lu, cmd, SCpnt)) - return -ENOMEM; - - sbp2_link_orb_command(lu, cmd); - return 0; -} - -/* - * Translates SBP-2 status into SCSI sense data for check conditions - */ -static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, - unchar *sense_data) -{ - /* OK, it's pretty ugly... ;-) */ - sense_data[0] = 0x70; - sense_data[1] = 0x0; - sense_data[2] = sbp2_status[9]; - sense_data[3] = sbp2_status[12]; - sense_data[4] = sbp2_status[13]; - sense_data[5] = sbp2_status[14]; - sense_data[6] = sbp2_status[15]; - sense_data[7] = 10; - sense_data[8] = sbp2_status[16]; - sense_data[9] = sbp2_status[17]; - sense_data[10] = sbp2_status[18]; - sense_data[11] = sbp2_status[19]; - sense_data[12] = sbp2_status[10]; - sense_data[13] = sbp2_status[11]; - sense_data[14] = sbp2_status[20]; - sense_data[15] = sbp2_status[21]; - - return sbp2_status[8] & 0x3f; -} - -static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, - int destid, quadlet_t *data, u64 addr, - size_t length, u16 fl) -{ - struct sbp2_fwhost_info *hi; - struct sbp2_lu *lu = NULL, *lu_tmp; - struct scsi_cmnd *SCpnt = NULL; - struct sbp2_status_block *sb; - u32 scsi_status = SBP2_SCSI_STATUS_GOOD; - struct sbp2_command_info *cmd; - unsigned long flags; - - if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { - SBP2_ERR("Wrong size of status block"); - return RCODE_ADDRESS_ERROR; - } - if (unlikely(!host)) { - SBP2_ERR("host is NULL - this is bad!"); - return RCODE_ADDRESS_ERROR; - } - hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - if (unlikely(!hi)) { - SBP2_ERR("host info is NULL - this is bad!"); - return RCODE_ADDRESS_ERROR; - } - - /* Find the unit which wrote the status. */ - read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); - list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { - if (lu_tmp->ne->nodeid == nodeid && - lu_tmp->status_fifo_addr == addr) { - lu = lu_tmp; - break; - } - } - read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); - - if (unlikely(!lu)) { - SBP2_ERR("lu is NULL - device is gone?"); - return RCODE_ADDRESS_ERROR; - } - - /* Put response into lu status fifo buffer. The first two bytes - * come in big endian bit order. Often the target writes only a - * truncated status block, minimally the first two quadlets. The rest - * is implied to be zeros. */ - sb = &lu->status_block; - memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); - memcpy(sb, data, length); - sbp2util_be32_to_cpu_buffer(sb, 8); - - /* Ignore unsolicited status. Handle command ORB status. */ - if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) - cmd = NULL; - else - cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); - if (cmd) { - /* Grab SCSI command pointers and check status. */ - /* - * FIXME: If the src field in the status is 1, the ORB DMA must - * not be reused until status for a subsequent ORB is received. - */ - SCpnt = cmd->Current_SCpnt; - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - sbp2util_mark_command_completed(lu, cmd); - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - - if (SCpnt) { - u32 h = sb->ORB_offset_hi_misc; - u32 r = STATUS_GET_RESP(h); - - if (r != RESP_STATUS_REQUEST_COMPLETE) { - SBP2_INFO("resp 0x%x, sbp_status 0x%x", - r, STATUS_GET_SBP_STATUS(h)); - scsi_status = - r == RESP_STATUS_TRANSPORT_FAILURE ? - SBP2_SCSI_STATUS_BUSY : - SBP2_SCSI_STATUS_COMMAND_TERMINATED; - } - - if (STATUS_GET_LEN(h) > 1) - scsi_status = sbp2_status_to_sense_data( - (unchar *)sb, SCpnt->sense_buffer); - - if (STATUS_TEST_DEAD(h)) - sbp2_agent_reset(lu, 0); - } - - /* Check here to see if there are no commands in-use. If there - * are none, we know that the fetch agent left the active state - * _and_ that we did not reactivate it yet. Therefore clear - * last_orb so that next time we write directly to the - * ORB_POINTER register. That way the fetch agent does not need - * to refetch the next_ORB. */ - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - if (list_empty(&lu->cmd_orb_inuse)) - lu->last_orb = NULL; - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - - } else { - /* It's probably status after a management request. */ - if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || - (sb->ORB_offset_lo == lu->login_orb_dma) || - (sb->ORB_offset_lo == lu->query_logins_orb_dma) || - (sb->ORB_offset_lo == lu->logout_orb_dma)) { - lu->access_complete = 1; - wake_up_interruptible(&sbp2_access_wq); - } - } - - if (SCpnt) - sbp2scsi_complete_command(lu, scsi_status, SCpnt, - cmd->Current_done); - return RCODE_COMPLETE; -} - -/************************************** - * SCSI interface related section - **************************************/ - -static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)) -{ - struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; - struct sbp2_fwhost_info *hi; - int result = DID_NO_CONNECT << 16; - - if (unlikely(!sbp2util_node_is_available(lu))) - goto done; - - hi = lu->hi; - - if (unlikely(!hi)) { - SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); - goto done; - } - - /* Multiple units are currently represented to the SCSI core as separate - * targets, not as one target with multiple LUs. Therefore return - * selection time-out to any IO directed at non-zero LUNs. */ - if (unlikely(SCpnt->device->lun)) - goto done; - - if (unlikely(!hpsb_node_entry_valid(lu->ne))) { - SBP2_ERR("Bus reset in progress - rejecting command"); - result = DID_BUS_BUSY << 16; - goto done; - } - - /* Bidirectional commands are not yet implemented, - * and unknown transfer direction not handled. */ - if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { - SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); - result = DID_ERROR << 16; - goto done; - } - - if (sbp2_send_command(lu, SCpnt, done)) { - SBP2_ERR("Error sending SCSI command"); - sbp2scsi_complete_command(lu, - SBP2_SCSI_STATUS_SELECTION_TIMEOUT, - SCpnt, done); - } - return 0; - -done: - SCpnt->result = result; - done(SCpnt); - return 0; -} - -static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) -{ - struct list_head *lh; - struct sbp2_command_info *cmd; - unsigned long flags; - - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - while (!list_empty(&lu->cmd_orb_inuse)) { - lh = lu->cmd_orb_inuse.next; - cmd = list_entry(lh, struct sbp2_command_info, list); - sbp2util_mark_command_completed(lu, cmd); - if (cmd->Current_SCpnt) { - cmd->Current_SCpnt->result = status << 16; - cmd->Current_done(cmd->Current_SCpnt); - } - } - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - - return; -} - -/* - * Complete a regular SCSI command. Can be called in atomic context. - */ -static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, - struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)) -{ - if (!SCpnt) { - SBP2_ERR("SCpnt is NULL"); - return; - } - - switch (scsi_status) { - case SBP2_SCSI_STATUS_GOOD: - SCpnt->result = DID_OK << 16; - break; - - case SBP2_SCSI_STATUS_BUSY: - SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); - SCpnt->result = DID_BUS_BUSY << 16; - break; - - case SBP2_SCSI_STATUS_CHECK_CONDITION: - SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; - break; - - case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: - SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); - SCpnt->result = DID_NO_CONNECT << 16; - scsi_print_command(SCpnt); - break; - - case SBP2_SCSI_STATUS_CONDITION_MET: - case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: - case SBP2_SCSI_STATUS_COMMAND_TERMINATED: - SBP2_ERR("Bad SCSI status = %x", scsi_status); - SCpnt->result = DID_ERROR << 16; - scsi_print_command(SCpnt); - break; - - default: - SBP2_ERR("Unsupported SCSI status = %x", scsi_status); - SCpnt->result = DID_ERROR << 16; - } - - /* If a bus reset is in progress and there was an error, complete - * the command as busy so that it will get retried. */ - if (!hpsb_node_entry_valid(lu->ne) - && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { - SBP2_ERR("Completing command with busy (bus reset)"); - SCpnt->result = DID_BUS_BUSY << 16; - } - - /* Tell the SCSI stack that we're done with this command. */ - done(SCpnt); -} - -static int sbp2scsi_slave_alloc(struct scsi_device *sdev) -{ - struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; - - if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0) - return -ENODEV; - - lu->sdev = sdev; - sdev->allow_restart = 1; - - /* SBP-2 requires quadlet alignment of the data buffers. */ - blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); - - if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) - sdev->inquiry_len = 36; - return 0; -} - -static int sbp2scsi_slave_configure(struct scsi_device *sdev) -{ - struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; - - sdev->use_10_for_rw = 1; - - if (sbp2_exclusive_login) - sdev->manage_start_stop = 1; - if (sdev->type == TYPE_ROM) - sdev->use_10_for_ms = 1; - if (sdev->type == TYPE_DISK && - lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) - sdev->skip_ms_page_8 = 1; - if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) - sdev->fix_capacity = 1; - if (lu->workarounds & SBP2_WORKAROUND_POWER_CONDITION) - sdev->start_stop_pwr_cond = 1; - if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) - blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); - - blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE); - return 0; -} - -static void sbp2scsi_slave_destroy(struct scsi_device *sdev) -{ - ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; - return; -} - -/* - * Called by scsi stack when something has really gone wrong. - * Usually called when a command has timed-out for some reason. - */ -static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) -{ - struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; - struct sbp2_command_info *cmd; - unsigned long flags; - - SBP2_INFO("aborting sbp2 command"); - scsi_print_command(SCpnt); - - if (sbp2util_node_is_available(lu)) { - sbp2_agent_reset(lu, 1); - - /* Return a matching command structure to the free pool. */ - spin_lock_irqsave(&lu->cmd_orb_lock, flags); - cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); - if (cmd) { - sbp2util_mark_command_completed(lu, cmd); - if (cmd->Current_SCpnt) { - cmd->Current_SCpnt->result = DID_ABORT << 16; - cmd->Current_done(cmd->Current_SCpnt); - } - } - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); - - sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); - } - - return SUCCESS; -} - -/* - * Called by scsi stack when something has really gone wrong. - */ -static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) -{ - struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; - - SBP2_INFO("reset requested"); - - if (sbp2util_node_is_available(lu)) { - SBP2_INFO("generating sbp2 fetch agent reset"); - sbp2_agent_reset(lu, 1); - } - - return SUCCESS; -} - -static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct scsi_device *sdev; - struct sbp2_lu *lu; - - if (!(sdev = to_scsi_device(dev))) - return 0; - - if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) - return 0; - - if (sbp2_long_sysfs_ieee1394_id) - return sprintf(buf, "%016Lx:%06x:%04x\n", - (unsigned long long)lu->ne->guid, - lu->ud->directory_id, ORB_SET_LUN(lu->lun)); - else - return sprintf(buf, "%016Lx:%d:%d\n", - (unsigned long long)lu->ne->guid, - lu->ud->id, ORB_SET_LUN(lu->lun)); -} - -MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); -MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); -MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); -MODULE_LICENSE("GPL"); - -static int sbp2_module_init(void) -{ - int ret; - - if (sbp2_serialize_io) { - sbp2_shost_template.can_queue = 1; - sbp2_shost_template.cmd_per_lun = 1; - } - - sbp2_shost_template.max_sectors = sbp2_max_sectors; - - hpsb_register_highlevel(&sbp2_highlevel); - ret = hpsb_register_protocol(&sbp2_driver); - if (ret) { - SBP2_ERR("Failed to register protocol"); - hpsb_unregister_highlevel(&sbp2_highlevel); - return ret; - } - return 0; -} - -static void __exit sbp2_module_exit(void) -{ - hpsb_unregister_protocol(&sbp2_driver); - hpsb_unregister_highlevel(&sbp2_highlevel); -} - -module_init(sbp2_module_init); -module_exit(sbp2_module_exit); |
