diff options
Diffstat (limited to 'drivers/scsi/atari_NCR5380.c')
| -rw-r--r-- | drivers/scsi/atari_NCR5380.c | 986 |
1 files changed, 472 insertions, 514 deletions
diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c index 79e6f045c2a9..6daed6b386d4 100644 --- a/drivers/scsi/atari_NCR5380.c +++ b/drivers/scsi/atari_NCR5380.c @@ -11,8 +11,6 @@ * drew@colorado.edu * +1 (303) 666-5836 * - * DISTRIBUTION RELEASE 6. - * * For more information, please consult * * NCR 5380 Family @@ -73,6 +71,9 @@ * 1. Test linked command handling code after Eric is ready with * the high level code. */ + +/* Adapted for the sun3 by Sam Creasey. */ + #include <scsi/scsi_dbg.h> #include <scsi/scsi_transport_spi.h> @@ -103,27 +104,7 @@ /* * Design - * Issues : - * - * The other Linux SCSI drivers were written when Linux was Intel PC-only, - * and specifically for each board rather than each chip. This makes their - * adaptation to platforms like the Mac (Some of which use NCR5380's) - * more difficult than it has to be. * - * Also, many of the SCSI drivers were written before the command queuing - * routines were implemented, meaning their implementations of queued - * commands were hacked on rather than designed in from the start. - * - * When I designed the Linux SCSI drivers I figured that - * while having two different SCSI boards in a system might be useful - * for debugging things, two of the same type wouldn't be used. - * Well, I was wrong and a number of users have mailed me about running - * multiple high-performance SCSI boards in a server. - * - * Finally, when I get questions from users, I have no idea what - * revision of my driver they are running. - * - * This driver attempts to address these problems : * This is a generic 5380 driver. To use it on a different platform, * one simply writes appropriate system specific macros (ie, data * transfer - some PC's will use the I/O bus, 68K's must use @@ -138,17 +119,6 @@ * allowing multiple commands to propagate all the way to a SCSI-II device * while a command is already executing. * - * To solve the multiple-boards-in-the-same-system problem, - * there is a separate instance structure for each instance - * of a 5380 in the system. So, multiple NCR5380 drivers will - * be able to coexist with appropriate changes to the high level - * SCSI code. - * - * A NCR5380_PUBLIC_REVISION macro is provided, with the release - * number (updated for each public release) printed by the - * NCR5380_print_options command, which should be called from the - * wrapper detect function, so that I know what release of the driver - * users are using. * * Issues specific to the NCR5380 : * @@ -173,19 +143,17 @@ * Architecture : * * At the heart of the design is a coroutine, NCR5380_main, - * which is started when not running by the interrupt handler, - * timer, and queue command function. It attempts to establish - * I_T_L or I_T_L_Q nexuses by removing the commands from the - * issue queue and calling NCR5380_select() if a nexus - * is not established. + * which is started from a workqueue for each NCR5380 host in the + * system. It attempts to establish I_T_L or I_T_L_Q nexuses by + * removing the commands from the issue queue and calling + * NCR5380_select() if a nexus is not established. * * Once a nexus is established, the NCR5380_information_transfer() * phase goes through the various phases as instructed by the target. * if the target goes into MSG IN and sends a DISCONNECT message, * the command structure is placed into the per instance disconnected - * queue, and NCR5380_main tries to find more work. If USLEEP - * was defined, and the target is idle for too long, the system - * will try to sleep. + * queue, and NCR5380_main tries to find more work. If the target is + * idle for too long, the system will try to sleep. * * If a command has disconnected, eventually an interrupt will trigger, * calling NCR5380_intr() which will in turn call NCR5380_reselect @@ -211,6 +179,9 @@ * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically * for commands that return with a CHECK CONDITION status. * + * DIFFERENTIAL - if defined, NCR53c81 chips will use external differential + * transceivers. + * * LINKED - if defined, linked commands are supported. * * REAL_DMA - if defined, REAL DMA is used during the data transfer phases. @@ -223,6 +194,9 @@ * * NCR5380_write(register, value) - write to the specific register * + * NCR5380_implementation_fields - additional fields needed for this + * specific implementation of the NCR5380 + * * Either real DMA *or* pseudo DMA may be implemented * REAL functions : * NCR5380_REAL_DMA should be defined if real DMA is to be used. @@ -241,40 +215,21 @@ * NCR5380_pwrite(instance, src, count) * NCR5380_pread(instance, dst, count); * - * If nothing specific to this implementation needs doing (ie, with external - * hardware), you must also define - * - * NCR5380_queue_command - * NCR5380_reset - * NCR5380_abort - * NCR5380_proc_info - * - * to be the global entry points into the specific driver, ie - * #define NCR5380_queue_command t128_queue_command. - * - * If this is not done, the routines will be defined as static functions - * with the NCR5380* names and the user must provide a globally - * accessible wrapper function. - * * The generic driver is initialized by calling NCR5380_init(instance), * after setting the appropriate host specific fields and ID. If the * driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance, - * possible) function may be used. Before the specific driver initialization - * code finishes, NCR5380_print_options should be called. + * possible) function may be used. */ -static struct Scsi_Host *first_instance = NULL; -static struct scsi_host_template *the_template = NULL; - /* Macros ease life... :-) */ #define SETUP_HOSTDATA(in) \ struct NCR5380_hostdata *hostdata = \ (struct NCR5380_hostdata *)(in)->hostdata #define HOSTDATA(in) ((struct NCR5380_hostdata *)(in)->hostdata) -#define NEXT(cmd) ((Scsi_Cmnd *)(cmd)->host_scribble) +#define NEXT(cmd) ((struct scsi_cmnd *)(cmd)->host_scribble) #define SET_NEXT(cmd,next) ((cmd)->host_scribble = (void *)(next)) -#define NEXTADDR(cmd) ((Scsi_Cmnd **)&(cmd)->host_scribble) +#define NEXTADDR(cmd) ((struct scsi_cmnd **)&(cmd)->host_scribble) #define HOSTNO instance->host_no #define H_NO(cmd) (cmd)->device->host->host_no @@ -316,30 +271,17 @@ static struct scsi_host_template *the_template = NULL; * important: the tag bit must be cleared before 'nr_allocated' is decreased. */ -/* -1 for TAG_NONE is not possible with unsigned char cmd->tag */ -#undef TAG_NONE -#define TAG_NONE 0xff - -typedef struct { - DECLARE_BITMAP(allocated, MAX_TAGS); - int nr_allocated; - int queue_size; -} TAG_ALLOC; - -static TAG_ALLOC TagAlloc[8][8]; /* 8 targets and 8 LUNs */ - - -static void __init init_tags(void) +static void __init init_tags(struct NCR5380_hostdata *hostdata) { int target, lun; - TAG_ALLOC *ta; + struct tag_alloc *ta; - if (!setup_use_tagged_queuing) + if (!(hostdata->flags & FLAG_TAGGED_QUEUING)) return; for (target = 0; target < 8; ++target) { for (lun = 0; lun < 8; ++lun) { - ta = &TagAlloc[target][lun]; + ta = &hostdata->TagAlloc[target][lun]; bitmap_zero(ta->allocated, MAX_TAGS); ta->nr_allocated = 0; /* At the beginning, assume the maximum queue size we could @@ -359,7 +301,7 @@ static void __init init_tags(void) * conditions. */ -static int is_lun_busy(Scsi_Cmnd *cmd, int should_be_tagged) +static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged) { u8 lun = cmd->device->lun; SETUP_HOSTDATA(cmd->device->host); @@ -367,10 +309,11 @@ static int is_lun_busy(Scsi_Cmnd *cmd, int should_be_tagged) if (hostdata->busy[cmd->device->id] & (1 << lun)) return 1; if (!should_be_tagged || - !setup_use_tagged_queuing || !cmd->device->tagged_supported) + !(hostdata->flags & FLAG_TAGGED_QUEUING) || + !cmd->device->tagged_supported) return 0; - if (TagAlloc[cmd->device->id][lun].nr_allocated >= - TagAlloc[cmd->device->id][lun].queue_size) { + if (hostdata->TagAlloc[scmd_id(cmd)][lun].nr_allocated >= + hostdata->TagAlloc[scmd_id(cmd)][lun].queue_size) { dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d: no free tags\n", H_NO(cmd), cmd->device->id, lun); return 1; @@ -384,7 +327,7 @@ static int is_lun_busy(Scsi_Cmnd *cmd, int should_be_tagged) * untagged. */ -static void cmd_get_tag(Scsi_Cmnd *cmd, int should_be_tagged) +static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged) { u8 lun = cmd->device->lun; SETUP_HOSTDATA(cmd->device->host); @@ -393,13 +336,14 @@ static void cmd_get_tag(Scsi_Cmnd *cmd, int should_be_tagged) * an untagged command. */ if (!should_be_tagged || - !setup_use_tagged_queuing || !cmd->device->tagged_supported) { + !(hostdata->flags & FLAG_TAGGED_QUEUING) || + !cmd->device->tagged_supported) { cmd->tag = TAG_NONE; hostdata->busy[cmd->device->id] |= (1 << lun); dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d now allocated by untagged " "command\n", H_NO(cmd), cmd->device->id, lun); } else { - TAG_ALLOC *ta = &TagAlloc[cmd->device->id][lun]; + struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun]; cmd->tag = find_first_zero_bit(ta->allocated, MAX_TAGS); set_bit(cmd->tag, ta->allocated); @@ -416,7 +360,7 @@ static void cmd_get_tag(Scsi_Cmnd *cmd, int should_be_tagged) * unlock the LUN. */ -static void cmd_free_tag(Scsi_Cmnd *cmd) +static void cmd_free_tag(struct scsi_cmnd *cmd) { u8 lun = cmd->device->lun; SETUP_HOSTDATA(cmd->device->host); @@ -429,7 +373,7 @@ static void cmd_free_tag(Scsi_Cmnd *cmd) printk(KERN_NOTICE "scsi%d: trying to free bad tag %d!\n", H_NO(cmd), cmd->tag); } else { - TAG_ALLOC *ta = &TagAlloc[cmd->device->id][lun]; + struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun]; clear_bit(cmd->tag, ta->allocated); ta->nr_allocated--; dprintk(NDEBUG_TAGS, "scsi%d: freed tag %d for target %d lun %d\n", @@ -438,17 +382,17 @@ static void cmd_free_tag(Scsi_Cmnd *cmd) } -static void free_all_tags(void) +static void free_all_tags(struct NCR5380_hostdata *hostdata) { int target, lun; - TAG_ALLOC *ta; + struct tag_alloc *ta; - if (!setup_use_tagged_queuing) + if (!(hostdata->flags & FLAG_TAGGED_QUEUING)) return; for (target = 0; target < 8; ++target) { for (lun = 0; lun < 8; ++lun) { - ta = &TagAlloc[target][lun]; + ta = &hostdata->TagAlloc[target][lun]; bitmap_zero(ta->allocated, MAX_TAGS); ta->nr_allocated = 0; } @@ -459,19 +403,20 @@ static void free_all_tags(void) /* - * Function: void merge_contiguous_buffers( Scsi_Cmnd *cmd ) + * Function: void merge_contiguous_buffers( struct scsi_cmnd *cmd ) * * Purpose: Try to merge several scatter-gather requests into one DMA * transfer. This is possible if the scatter buffers lie on * physical contiguous addresses. * - * Parameters: Scsi_Cmnd *cmd + * Parameters: struct scsi_cmnd *cmd * The command to work on. The first scatter buffer's data are * assumed to be already transferred into ptr/this_residual. */ -static void merge_contiguous_buffers(Scsi_Cmnd *cmd) +static void merge_contiguous_buffers(struct scsi_cmnd *cmd) { +#if !defined(CONFIG_SUN3) unsigned long endaddr; #if (NDEBUG & NDEBUG_MERGING) unsigned long oldlen = cmd->SCp.this_residual; @@ -496,18 +441,17 @@ static void merge_contiguous_buffers(Scsi_Cmnd *cmd) dprintk(NDEBUG_MERGING, "merged %d buffers from %p, new length %08x\n", cnt, cmd->SCp.ptr, cmd->SCp.this_residual); #endif +#endif /* !defined(CONFIG_SUN3) */ } -/* - * Function : void initialize_SCp(Scsi_Cmnd *cmd) +/** + * initialize_SCp - init the scsi pointer field + * @cmd: command block to set up * - * Purpose : initialize the saved data pointers for cmd to point to the - * start of the buffer. - * - * Inputs : cmd - Scsi_Cmnd structure to have pointers reset. + * Set up the internal fields in the SCSI command. */ -static inline void initialize_SCp(Scsi_Cmnd *cmd) +static inline void initialize_SCp(struct scsi_cmnd *cmd) { /* * Initialize the Scsi Pointer field so that all of the commands in the @@ -557,12 +501,11 @@ static struct { {0, NULL} }; -/* - * Function : void NCR5380_print(struct Scsi_Host *instance) +/** + * NCR5380_print - print scsi bus signals + * @instance: adapter state to dump * - * Purpose : print the SCSI bus signals for debugging purposes - * - * Input : instance - which NCR5380 + * Print the SCSI bus signals for debugging purposes */ static void NCR5380_print(struct Scsi_Host *instance) @@ -605,12 +548,13 @@ static struct { {PHASE_UNKNOWN, "UNKNOWN"} }; -/* - * Function : void NCR5380_print_phase(struct Scsi_Host *instance) +/** + * NCR5380_print_phase - show SCSI phase + * @instance: adapter to dump * - * Purpose : print the current SCSI phase for debugging purposes + * Print the current SCSI phase for debugging purposes * - * Input : instance - which NCR5380 + * Locks: none */ static void NCR5380_print_phase(struct Scsi_Host *instance) @@ -648,71 +592,75 @@ static void NCR5380_print_phase(struct Scsi_Host *instance) #include <linux/workqueue.h> #include <linux/interrupt.h> -static volatile int main_running; -static DECLARE_WORK(NCR5380_tqueue, NCR5380_main); - -static inline void queue_main(void) +static inline void queue_main(struct NCR5380_hostdata *hostdata) { - if (!main_running) { + if (!hostdata->main_running) { /* If in interrupt and NCR5380_main() not already running, queue it on the 'immediate' task queue, to be processed immediately after the current interrupt processing has finished. */ - schedule_work(&NCR5380_tqueue); + schedule_work(&hostdata->main_task); } /* else: nothing to do: the running NCR5380_main() will pick up any newly queued command. */ } - -static inline void NCR5380_all_init(void) -{ - static int done = 0; - if (!done) { - dprintk(NDEBUG_INIT, "scsi : NCR5380_all_init()\n"); - done = 1; - } -} - - -/* - * Function : void NCR58380_print_options (struct Scsi_Host *instance) +/** + * NCR58380_info - report driver and host information + * @instance: relevant scsi host instance * - * Purpose : called by probe code indicating the NCR5380 driver - * options that were selected. + * For use as the host template info() handler. * - * Inputs : instance, pointer to this instance. Unused. + * Locks: none */ -static void __init NCR5380_print_options(struct Scsi_Host *instance) +static const char *NCR5380_info(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + return hostdata->info; +} + +static void prepare_info(struct Scsi_Host *instance) { - printk(" generic options" -#ifdef AUTOSENSE - " AUTOSENSE" + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + snprintf(hostdata->info, sizeof(hostdata->info), + "%s, io_port 0x%lx, n_io_port %d, " + "base 0x%lx, irq %d, " + "can_queue %d, cmd_per_lun %d, " + "sg_tablesize %d, this_id %d, " + "flags { %s}, " + "options { %s} ", + instance->hostt->name, instance->io_port, instance->n_io_port, + instance->base, instance->irq, + instance->can_queue, instance->cmd_per_lun, + instance->sg_tablesize, instance->this_id, + hostdata->flags & FLAG_TAGGED_QUEUING ? "TAGGED_QUEUING " : "", +#ifdef DIFFERENTIAL + "DIFFERENTIAL " #endif #ifdef REAL_DMA - " REAL DMA" + "REAL_DMA " #endif #ifdef PARITY - " PARITY" + "PARITY " #endif #ifdef SUPPORT_TAGS - " SCSI-2 TAGGED QUEUING" + "SUPPORT_TAGS " #endif - ); - printk(" generic release=%d", NCR5380_PUBLIC_RELEASE); + ""); } -/* - * Function : void NCR5380_print_status (struct Scsi_Host *instance) +/** + * NCR5380_print_status - dump controller info + * @instance: controller to dump * - * Purpose : print commands in the various queues, called from - * NCR5380_abort and NCR5380_debug to aid debugging. - * - * Inputs : instance, pointer to this instance. + * Print commands in the various queues, called from NCR5380_abort + * to aid debugging. */ -static void lprint_Scsi_Cmnd(Scsi_Cmnd *cmd) +static void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd) { int i, s; unsigned char *command; @@ -729,7 +677,7 @@ static void lprint_Scsi_Cmnd(Scsi_Cmnd *cmd) static void NCR5380_print_status(struct Scsi_Host *instance) { struct NCR5380_hostdata *hostdata; - Scsi_Cmnd *ptr; + struct scsi_cmnd *ptr; unsigned long flags; NCR5380_dprint(NDEBUG_ANY, instance); @@ -737,20 +685,19 @@ static void NCR5380_print_status(struct Scsi_Host *instance) hostdata = (struct NCR5380_hostdata *)instance->hostdata; - printk("\nNCR5380 core release=%d.\n", NCR5380_PUBLIC_RELEASE); local_irq_save(flags); printk("NCR5380: coroutine is%s running.\n", - main_running ? "" : "n't"); + hostdata->main_running ? "" : "n't"); if (!hostdata->connected) printk("scsi%d: no currently connected command\n", HOSTNO); else - lprint_Scsi_Cmnd((Scsi_Cmnd *) hostdata->connected); + lprint_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected); printk("scsi%d: issue_queue\n", HOSTNO); - for (ptr = (Scsi_Cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr)) + for (ptr = (struct scsi_cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr)) lprint_Scsi_Cmnd(ptr); printk("scsi%d: disconnected_queue\n", HOSTNO); - for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; + for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; ptr = NEXT(ptr)) lprint_Scsi_Cmnd(ptr); @@ -758,7 +705,7 @@ static void NCR5380_print_status(struct Scsi_Host *instance) printk("\n"); } -static void show_Scsi_Cmnd(Scsi_Cmnd *cmd, struct seq_file *m) +static void show_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m) { int i, s; unsigned char *command; @@ -772,28 +719,28 @@ static void show_Scsi_Cmnd(Scsi_Cmnd *cmd, struct seq_file *m) seq_printf(m, "\n"); } -static int NCR5380_show_info(struct seq_file *m, struct Scsi_Host *instance) +static int __maybe_unused NCR5380_show_info(struct seq_file *m, + struct Scsi_Host *instance) { struct NCR5380_hostdata *hostdata; - Scsi_Cmnd *ptr; + struct scsi_cmnd *ptr; unsigned long flags; hostdata = (struct NCR5380_hostdata *)instance->hostdata; - seq_printf(m, "NCR5380 core release=%d.\n", NCR5380_PUBLIC_RELEASE); local_irq_save(flags); seq_printf(m, "NCR5380: coroutine is%s running.\n", - main_running ? "" : "n't"); + hostdata->main_running ? "" : "n't"); if (!hostdata->connected) seq_printf(m, "scsi%d: no currently connected command\n", HOSTNO); else - show_Scsi_Cmnd((Scsi_Cmnd *) hostdata->connected, m); + show_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected, m); seq_printf(m, "scsi%d: issue_queue\n", HOSTNO); - for (ptr = (Scsi_Cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr)) + for (ptr = (struct scsi_cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr)) show_Scsi_Cmnd(ptr, m); seq_printf(m, "scsi%d: disconnected_queue\n", HOSTNO); - for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; + for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; ptr = NEXT(ptr)) show_Scsi_Cmnd(ptr, m); @@ -801,16 +748,18 @@ static int NCR5380_show_info(struct seq_file *m, struct Scsi_Host *instance) return 0; } -/* - * Function : void NCR5380_init (struct Scsi_Host *instance) +/** + * NCR5380_init - initialise an NCR5380 + * @instance: adapter to configure + * @flags: control flags * - * Purpose : initializes *instance and corresponding 5380 chip. - * - * Inputs : instance - instantiation of the 5380 driver. + * Initializes *instance and corresponding 5380 chip, + * with flags OR'd into the initial flags value. * * Notes : I assume that the host, hostno, and id bits have been - * set correctly. I don't care about the irq and other fields. + * set correctly. I don't care about the irq and other fields. * + * Returns 0 for success */ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) @@ -818,8 +767,7 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) int i; SETUP_HOSTDATA(instance); - NCR5380_all_init(); - + hostdata->host = instance; hostdata->aborted = 0; hostdata->id_mask = 1 << instance->this_id; hostdata->id_higher_mask = 0; @@ -829,7 +777,7 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) for (i = 0; i < 8; ++i) hostdata->busy[i] = 0; #ifdef SUPPORT_TAGS - init_tags(); + init_tags(hostdata); #endif #if defined (REAL_DMA) hostdata->dma_len = 0; @@ -838,19 +786,11 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) hostdata->connected = NULL; hostdata->issue_queue = NULL; hostdata->disconnected_queue = NULL; - hostdata->flags = FLAG_CHECK_LAST_BYTE_SENT; + hostdata->flags = flags; - if (!the_template) { - the_template = instance->hostt; - first_instance = instance; - } + INIT_WORK(&hostdata->main_task, NCR5380_main); -#ifndef AUTOSENSE - if ((instance->cmd_per_lun > 1) || (instance->can_queue > 1)) - printk("scsi%d: WARNING : support for multiple outstanding commands enabled\n" - " without AUTOSENSE option, contingent allegiance conditions may\n" - " be incorrectly cleared.\n", HOSTNO); -#endif /* def AUTOSENSE */ + prepare_info(instance); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_write(MODE_REG, MR_BASE); @@ -860,33 +800,35 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) return 0; } +/** + * NCR5380_exit - remove an NCR5380 + * @instance: adapter to remove + * + * Assumes that no more work can be queued (e.g. by NCR5380_intr). + */ + static void NCR5380_exit(struct Scsi_Host *instance) { - /* Empty, as we didn't schedule any delayed work */ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + cancel_work_sync(&hostdata->main_task); } -/* - * Function : int NCR5380_queue_command (Scsi_Cmnd *cmd, - * void (*done)(Scsi_Cmnd *)) - * - * Purpose : enqueues a SCSI command - * - * Inputs : cmd - SCSI command, done - function called on completion, with - * a pointer to the command descriptor. - * - * Returns : 0 - * - * Side effects : - * cmd is added to the per instance issue_queue, with minor - * twiddling done to the host specific fields of cmd. If the - * main coroutine is not running, it is restarted. +/** + * NCR5380_queue_command - queue a command + * @instance: the relevant SCSI adapter + * @cmd: SCSI command * + * cmd is added to the per instance issue_queue, with minor + * twiddling done to the host specific fields of cmd. If the + * main coroutine is not running, it is restarted. */ -static int NCR5380_queue_command_lck(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) +static int NCR5380_queue_command(struct Scsi_Host *instance, + struct scsi_cmnd *cmd) { - SETUP_HOSTDATA(cmd->device->host); - Scsi_Cmnd *tmp; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct scsi_cmnd *tmp; unsigned long flags; #if (NDEBUG & NDEBUG_NO_WRITE) @@ -896,47 +838,17 @@ static int NCR5380_queue_command_lck(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) printk(KERN_NOTICE "scsi%d: WRITE attempted with NO_WRITE debugging flag set\n", H_NO(cmd)); cmd->result = (DID_ERROR << 16); - done(cmd); + cmd->scsi_done(cmd); return 0; } #endif /* (NDEBUG & NDEBUG_NO_WRITE) */ -#ifdef NCR5380_STATS -# if 0 - if (!hostdata->connected && !hostdata->issue_queue && - !hostdata->disconnected_queue) { - hostdata->timebase = jiffies; - } -# endif -# ifdef NCR5380_STAT_LIMIT - if (scsi_bufflen(cmd) > NCR5380_STAT_LIMIT) -# endif - switch (cmd->cmnd[0]) { - case WRITE: - case WRITE_6: - case WRITE_10: - hostdata->time_write[cmd->device->id] -= (jiffies - hostdata->timebase); - hostdata->bytes_write[cmd->device->id] += scsi_bufflen(cmd); - hostdata->pendingw++; - break; - case READ: - case READ_6: - case READ_10: - hostdata->time_read[cmd->device->id] -= (jiffies - hostdata->timebase); - hostdata->bytes_read[cmd->device->id] += scsi_bufflen(cmd); - hostdata->pendingr++; - break; - } -#endif - /* * We use the host_scribble field as a pointer to the next command * in a queue */ SET_NEXT(cmd, NULL); - cmd->scsi_done = done; - cmd->result = 0; /* @@ -946,7 +858,6 @@ static int NCR5380_queue_command_lck(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) * sense data is only guaranteed to be valid while the condition exists. */ - local_irq_save(flags); /* ++guenther: now that the issue queue is being set up, we can lock ST-DMA. * Otherwise a running NCR5380_main may steal the lock. * Lock before actually inserting due to fairness reasons explained in @@ -959,17 +870,24 @@ static int NCR5380_queue_command_lck(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) * because also a timer int can trigger an abort or reset, which would * alter queues and touch the lock. */ - if (!IS_A_TT()) { - /* perhaps stop command timer here */ - falcon_get_lock(); - /* perhaps restart command timer here */ - } + if (!NCR5380_acquire_dma_irq(instance)) + return SCSI_MLQUEUE_HOST_BUSY; + + local_irq_save(flags); + + /* + * Insert the cmd into the issue queue. Note that REQUEST SENSE + * commands are added to the head of the queue since any command will + * clear the contingent allegiance condition that exists and the + * sense data is only guaranteed to be valid while the condition exists. + */ + if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) { LIST(cmd, hostdata->issue_queue); SET_NEXT(cmd, hostdata->issue_queue); hostdata->issue_queue = cmd; } else { - for (tmp = (Scsi_Cmnd *)hostdata->issue_queue; + for (tmp = (struct scsi_cmnd *)hostdata->issue_queue; NEXT(tmp); tmp = NEXT(tmp)) ; LIST(cmd, tmp); @@ -987,32 +905,42 @@ static int NCR5380_queue_command_lck(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) * If we're not in an interrupt, we can call NCR5380_main() * unconditionally, because it cannot be already running. */ - if (in_interrupt() || ((flags >> 8) & 7) >= 6) - queue_main(); + if (in_interrupt() || irqs_disabled()) + queue_main(hostdata); else - NCR5380_main(NULL); + NCR5380_main(&hostdata->main_task); return 0; } -static DEF_SCSI_QCMD(NCR5380_queue_command) +static inline void maybe_release_dma_irq(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + /* Caller does the locking needed to set & test these data atomically */ + if (!hostdata->disconnected_queue && + !hostdata->issue_queue && + !hostdata->connected && + !hostdata->retain_dma_intr) + NCR5380_release_dma_irq(instance); +} -/* - * Function : NCR5380_main (void) +/** + * NCR5380_main - NCR state machines * - * Purpose : NCR5380_main is a coroutine that runs as long as more work can - * be done on the NCR5380 host adapters in a system. Both - * NCR5380_queue_command() and NCR5380_intr() will try to start it - * in case it is not running. + * NCR5380_main is a coroutine that runs as long as more work can + * be done on the NCR5380 host adapters in a system. Both + * NCR5380_queue_command() and NCR5380_intr() will try to start it + * in case it is not running. * - * NOTE : NCR5380_main exits with interrupts *disabled*, the caller should - * reenable them. This prevents reentrancy and kernel stack overflow. + * Locks: called as its own thread with no locks held. */ static void NCR5380_main(struct work_struct *work) { - Scsi_Cmnd *tmp, *prev; - struct Scsi_Host *instance = first_instance; - struct NCR5380_hostdata *hostdata = HOSTDATA(instance); + struct NCR5380_hostdata *hostdata = + container_of(work, struct NCR5380_hostdata, main_task); + struct Scsi_Host *instance = hostdata->host; + struct scsi_cmnd *tmp, *prev; int done; unsigned long flags; @@ -1037,9 +965,9 @@ static void NCR5380_main(struct work_struct *work) 'main_running' is set here, and queues/executes main via the task queue, it doesn't do any harm, just this instance of main won't find any work left to do. */ - if (main_running) + if (hostdata->main_running) return; - main_running = 1; + hostdata->main_running = 1; local_save_flags(flags); do { @@ -1053,7 +981,7 @@ static void NCR5380_main(struct work_struct *work) * for a target that's not busy. */ #if (NDEBUG & NDEBUG_LISTS) - for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, prev = NULL; + for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL; tmp && (tmp != prev); prev = tmp, tmp = NEXT(tmp)) ; /*printk("%p ", tmp);*/ @@ -1061,16 +989,14 @@ static void NCR5380_main(struct work_struct *work) printk(" LOOP\n"); /* else printk("\n"); */ #endif - for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, + for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = NEXT(tmp)) { u8 lun = tmp->device->lun; -#if (NDEBUG & NDEBUG_LISTS) - if (prev != tmp) - printk("MAIN tmp=%p target=%d busy=%d lun=%llu\n", - tmp, tmp->device->id, hostdata->busy[tmp->device->id], - lun); -#endif + dprintk(NDEBUG_LISTS, + "MAIN tmp=%p target=%d busy=%d lun=%d\n", + tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)], + lun); /* When we find one, remove it from the issue queue. */ /* ++guenther: possible race with Falcon locking */ if ( @@ -1090,7 +1016,7 @@ static void NCR5380_main(struct work_struct *work) hostdata->issue_queue = NEXT(tmp); } SET_NEXT(tmp, NULL); - falcon_dont_release++; + hostdata->retain_dma_intr++; /* reenable interrupts after finding one */ local_irq_restore(flags); @@ -1117,12 +1043,12 @@ static void NCR5380_main(struct work_struct *work) #ifdef SUPPORT_TAGS cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE); #endif - if (!NCR5380_select(instance, tmp, - (tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE : - TAG_NEXT)) { - falcon_dont_release--; + if (!NCR5380_select(instance, tmp)) { + local_irq_disable(); + hostdata->retain_dma_intr--; /* release if target did not response! */ - falcon_release_lock_if_possible(hostdata); + maybe_release_dma_irq(instance); + local_irq_restore(flags); break; } else { local_irq_disable(); @@ -1132,7 +1058,7 @@ static void NCR5380_main(struct work_struct *work) #ifdef SUPPORT_TAGS cmd_free_tag(tmp); #endif - falcon_dont_release--; + hostdata->retain_dma_intr--; local_irq_restore(flags); dprintk(NDEBUG_MAIN, "scsi%d: main(): select() failed, " "returned to issue_queue\n", HOSTNO); @@ -1160,7 +1086,7 @@ static void NCR5380_main(struct work_struct *work) /* Better allow ints _after_ 'main_running' has been cleared, else an interrupt could believe we'll pick up the work it left for us, but we won't see it anymore here... */ - main_running = 0; + hostdata->main_running = 0; local_irq_restore(flags); } @@ -1179,9 +1105,11 @@ static void NCR5380_main(struct work_struct *work) static void NCR5380_dma_complete(struct Scsi_Host *instance) { SETUP_HOSTDATA(instance); - int transfered, saved_data = 0, overrun = 0, cnt, toPIO; - unsigned char **data, p; + int transferred; + unsigned char **data; volatile int *count; + int saved_data = 0, overrun = 0; + unsigned char p; if (!hostdata->connected) { printk(KERN_WARNING "scsi%d: received end of DMA interrupt with " @@ -1189,7 +1117,7 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) return; } - if (atari_read_overruns) { + if (hostdata->read_overruns) { p = hostdata->connected->SCp.phase; if (p & SR_IO) { udelay(10); @@ -1207,21 +1135,41 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) HOSTNO, NCR5380_read(BUS_AND_STATUS_REG), NCR5380_read(STATUS_REG)); +#if defined(CONFIG_SUN3) + if ((sun3scsi_dma_finish(rq_data_dir(hostdata->connected->request)))) { + pr_err("scsi%d: overrun in UDC counter -- not prepared to deal with this!\n", + instance->host_no); + BUG(); + } + + /* make sure we're not stuck in a data phase */ + if ((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) == + (BASR_PHASE_MATCH | BASR_ACK)) { + pr_err("scsi%d: BASR %02x\n", instance->host_no, + NCR5380_read(BUS_AND_STATUS_REG)); + pr_err("scsi%d: bus stuck in data phase -- probably a single byte overrun!\n", + instance->host_no); + BUG(); + } +#endif + (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - transfered = hostdata->dma_len - NCR5380_dma_residual(instance); + transferred = hostdata->dma_len - NCR5380_dma_residual(instance); hostdata->dma_len = 0; data = (unsigned char **)&hostdata->connected->SCp.ptr; count = &hostdata->connected->SCp.this_residual; - *data += transfered; - *count -= transfered; + *data += transferred; + *count -= transferred; + + if (hostdata->read_overruns) { + int cnt, toPIO; - if (atari_read_overruns) { if ((NCR5380_read(STATUS_REG) & PHASE_MASK) == p && (p & SR_IO)) { - cnt = toPIO = atari_read_overruns; + cnt = toPIO = hostdata->read_overruns; if (overrun) { dprintk(NDEBUG_DMA, "Got an input overrun, using saved byte\n"); *(*data)++ = saved_data; @@ -1238,20 +1186,19 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) #endif /* REAL_DMA */ -/* - * Function : void NCR5380_intr (int irq) - * - * Purpose : handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses - * from the disconnected queue, and restarting NCR5380_main() - * as required. - * - * Inputs : int irq, irq that caused this interrupt. +/** + * NCR5380_intr - generic NCR5380 irq handler + * @irq: interrupt number + * @dev_id: device info * + * Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses + * from the disconnected queue, and restarting NCR5380_main() + * as required. */ static irqreturn_t NCR5380_intr(int irq, void *dev_id) { - struct Scsi_Host *instance = first_instance; + struct Scsi_Host *instance = dev_id; int done = 1, handled = 0; unsigned char basr; @@ -1265,7 +1212,6 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id) NCR5380_dprint(NDEBUG_INTR, instance); if ((NCR5380_read(STATUS_REG) & (SR_SEL|SR_IO)) == (SR_SEL|SR_IO)) { done = 0; - ENABLE_IRQ(); dprintk(NDEBUG_INTR, "scsi%d: SEL interrupt\n", HOSTNO); NCR5380_reselect(instance); (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); @@ -1295,17 +1241,19 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id) dprintk(NDEBUG_INTR, "scsi%d: PHASE MISM or EOP interrupt\n", HOSTNO); NCR5380_dma_complete( instance ); done = 0; - ENABLE_IRQ(); } else #endif /* REAL_DMA */ { /* MS: Ignore unknown phase mismatch interrupts (caused by EOP interrupt) */ if (basr & BASR_PHASE_MATCH) - printk(KERN_NOTICE "scsi%d: unknown interrupt, " + dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt, " "BASR 0x%x, MR 0x%x, SR 0x%x\n", HOSTNO, basr, NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG)); (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_DMA_ENABLE; +#endif } } /* if !(SELECTION || PARITY) */ handled = 1; @@ -1314,53 +1262,29 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id) "BASR 0x%X, MR 0x%X, SR 0x%x\n", HOSTNO, basr, NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG)); (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_DMA_ENABLE; +#endif } if (!done) { dprintk(NDEBUG_INTR, "scsi%d: in int routine, calling main\n", HOSTNO); /* Put a call to NCR5380_main() on the queue... */ - queue_main(); + queue_main(shost_priv(instance)); } return IRQ_RETVAL(handled); } -#ifdef NCR5380_STATS -static void collect_stats(struct NCR5380_hostdata* hostdata, Scsi_Cmnd *cmd) -{ -# ifdef NCR5380_STAT_LIMIT - if (scsi_bufflen(cmd) > NCR5380_STAT_LIMIT) -# endif - switch (cmd->cmnd[0]) { - case WRITE: - case WRITE_6: - case WRITE_10: - hostdata->time_write[cmd->device->id] += (jiffies - hostdata->timebase); - /*hostdata->bytes_write[cmd->device->id] += scsi_bufflen(cmd);*/ - hostdata->pendingw--; - break; - case READ: - case READ_6: - case READ_10: - hostdata->time_read[cmd->device->id] += (jiffies - hostdata->timebase); - /*hostdata->bytes_read[cmd->device->id] += scsi_bufflen(cmd);*/ - hostdata->pendingr--; - break; - } -} -#endif - /* - * Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd, - * int tag); + * Function : int NCR5380_select(struct Scsi_Host *instance, + * struct scsi_cmnd *cmd) * * Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command, * including ARBITRATION, SELECTION, and initial message out for * IDENTIFY and queue messages. * * Inputs : instance - instantiation of the 5380 driver on which this - * target lives, cmd - SCSI command to execute, tag - set to TAG_NEXT for - * new tag, TAG_NONE for untagged queueing, otherwise set to the tag for - * the command that is presently connected. + * target lives, cmd - SCSI command to execute. * * Returns : -1 if selection could not execute for some reason, * 0 if selection succeeded or failed because the target @@ -1380,7 +1304,7 @@ static void collect_stats(struct NCR5380_hostdata* hostdata, Scsi_Cmnd *cmd) * cmd->result host byte set to DID_BAD_TARGET. */ -static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag) +static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) { SETUP_HOSTDATA(instance); unsigned char tmp[3], phase; @@ -1562,7 +1486,7 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag) * selection. */ - timeout = jiffies + 25; + timeout = jiffies + (250 * HZ / 1000); /* * XXX very interesting - we're seeing a bounce where the BSY we @@ -1616,9 +1540,6 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag) return -1; } cmd->result = DID_BAD_TARGET << 16; -#ifdef NCR5380_STATS - collect_stats(hostdata, cmd); -#endif #ifdef SUPPORT_TAGS cmd_free_tag(cmd); #endif @@ -1676,6 +1597,9 @@ static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag) #ifndef SUPPORT_TAGS hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); #endif +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_INTR; +#endif initialize_SCp(cmd); @@ -1826,7 +1750,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, * Returns : 0 on success, -1 on failure. */ -static int do_abort(struct Scsi_Host *host) +static int do_abort(struct Scsi_Host *instance) { unsigned char tmp, *msgptr, phase; int len; @@ -1861,7 +1785,7 @@ static int do_abort(struct Scsi_Host *host) msgptr = &tmp; len = 1; phase = PHASE_MSGOUT; - NCR5380_transfer_pio(host, &phase, &len, &msgptr); + NCR5380_transfer_pio(instance, &phase, &len, &msgptr); /* * If we got here, and the command completed successfully, @@ -1899,17 +1823,62 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, SETUP_HOSTDATA(instance); register int c = *count; register unsigned char p = *phase; + unsigned long flags; + +#if defined(CONFIG_SUN3) + /* sanity check */ + if (!sun3_dma_setup_done) { + pr_err("scsi%d: transfer_dma without setup!\n", + instance->host_no); + BUG(); + } + hostdata->dma_len = c; + + dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n", + instance->host_no, (p & SR_IO) ? "reading" : "writing", + c, (p & SR_IO) ? "to" : "from", *data); + + /* netbsd turns off ints here, why not be safe and do it too */ + local_irq_save(flags); + + /* send start chain */ + sun3scsi_dma_start(c, *data); + + if (p & SR_IO) { + NCR5380_write(TARGET_COMMAND_REG, 1); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + NCR5380_write(INITIATOR_COMMAND_REG, 0); + NCR5380_write(MODE_REG, + (NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR)); + NCR5380_write(START_DMA_INITIATOR_RECEIVE_REG, 0); + } else { + NCR5380_write(TARGET_COMMAND_REG, 0); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_DATA); + NCR5380_write(MODE_REG, + (NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR)); + NCR5380_write(START_DMA_SEND_REG, 0); + } + +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_DMA_ENABLE; +#endif + + local_irq_restore(flags); + + sun3_dma_active = 1; + +#else /* !defined(CONFIG_SUN3) */ register unsigned char *d = *data; unsigned char tmp; - unsigned long flags; if ((tmp = (NCR5380_read(STATUS_REG) & PHASE_MASK)) != p) { *phase = tmp; return -1; } - if (atari_read_overruns && (p & SR_IO)) - c -= atari_read_overruns; + if (hostdata->read_overruns && (p & SR_IO)) + c -= hostdata->read_overruns; dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n", HOSTNO, (p & SR_IO) ? "reading" : "writing", @@ -1921,7 +1890,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY); #endif /* def REAL_DMA */ - if (IS_A_TT()) { + if (!(hostdata->flags & FLAG_LATE_DMA_SETUP)) { /* On the Medusa, it is a must to initialize the DMA before * starting the NCR. This is also the cleaner way for the TT. */ @@ -1939,7 +1908,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, NCR5380_write(START_DMA_SEND_REG, 0); } - if (!IS_A_TT()) { + if (hostdata->flags & FLAG_LATE_DMA_SETUP) { /* On the Falcon, the DMA setup must be done after the last */ /* NCR access, else the DMA setup gets trashed! */ @@ -1949,6 +1918,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, NCR5380_dma_write_setup(instance, d, c); local_irq_restore(flags); } +#endif /* !defined(CONFIG_SUN3) */ + return 0; } #endif /* defined(REAL_DMA) */ @@ -1982,7 +1953,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) #endif unsigned char *data; unsigned char phase, tmp, extended_msg[10], old_phase = 0xff; - Scsi_Cmnd *cmd = (Scsi_Cmnd *) hostdata->connected; + struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected; + +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_INTR; +#endif while (1) { tmp = NCR5380_read(STATUS_REG); @@ -1993,6 +1968,33 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) old_phase = phase; NCR5380_dprint_phase(NDEBUG_INFORMATION, instance); } +#if defined(CONFIG_SUN3) + if (phase == PHASE_CMDOUT) { +#if defined(REAL_DMA) + void *d; + unsigned long count; + + if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { + count = cmd->SCp.buffer->length; + d = sg_virt(cmd->SCp.buffer); + } else { + count = cmd->SCp.this_residual; + d = cmd->SCp.ptr; + } + /* this command setup for dma yet? */ + if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != cmd)) { + if (cmd->request->cmd_type == REQ_TYPE_FS) { + sun3scsi_dma_setup(d, count, + rq_data_dir(cmd->request)); + sun3_dma_setup_done = cmd; + } + } +#endif +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_INTR; +#endif + } +#endif /* CONFIG_SUN3 */ if (sink && (phase != PHASE_MSGOUT)) { NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp)); @@ -2054,8 +2056,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ #if defined(REAL_DMA) - if (!cmd->device->borken && - (transfersize = NCR5380_dma_xfer_len(instance,cmd,phase)) > 31) { + if ( +#if !defined(CONFIG_SUN3) + !cmd->device->borken && +#endif + (transfersize = NCR5380_dma_xfer_len(instance, cmd, phase)) >= DMA_MIN_SIZE) { len = transfersize; cmd->SCp.phase = phase; if (NCR5380_transfer_dma(instance, &phase, @@ -2064,9 +2069,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) * If the watchdog timer fires, all future * accesses to this device will use the * polled-IO. */ - printk(KERN_NOTICE "scsi%d: switching target %d " - "lun %llu to slow handshake\n", HOSTNO, - cmd->device->id, cmd->device->lun); + scmd_printk(KERN_INFO, cmd, + "switching to slow handshake\n"); cmd->device->borken = 1; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); @@ -2092,6 +2096,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) NCR5380_transfer_pio(instance, &phase, (int *)&cmd->SCp.this_residual, (unsigned char **)&cmd->SCp.ptr); +#if defined(CONFIG_SUN3) && defined(REAL_DMA) + /* if we had intended to dma that command clear it */ + if (sun3_dma_setup_done == cmd) + sun3_dma_setup_done = NULL; +#endif break; case PHASE_MSGIN: len = 1; @@ -2145,9 +2154,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) dprintk(NDEBUG_LINKED, "scsi%d: target %d lun %llu linked request " "done, calling scsi_done().\n", HOSTNO, cmd->device->id, cmd->device->lun); -#ifdef NCR5380_STATS - collect_stats(hostdata, cmd); -#endif cmd->scsi_done(cmd); cmd = hostdata->connected; break; @@ -2156,11 +2162,12 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) case COMMAND_COMPLETE: /* Accept message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - /* ++guenther: possible race with Falcon locking */ - falcon_dont_release++; - hostdata->connected = NULL; dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d, lun %llu " "completed\n", HOSTNO, cmd->device->id, cmd->device->lun); + + local_irq_save(flags); + hostdata->retain_dma_intr++; + hostdata->connected = NULL; #ifdef SUPPORT_TAGS cmd_free_tag(cmd); if (status_byte(cmd->SCp.Status) == QUEUE_FULL) { @@ -2172,7 +2179,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ /* ++Andreas: the mid level code knows about QUEUE_FULL now. */ - TAG_ALLOC *ta = &TagAlloc[cmd->device->id][cmd->device->lun]; + struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][cmd->device->lun]; dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu returned " "QUEUE_FULL after %d commands\n", HOSTNO, cmd->device->id, cmd->device->lun, @@ -2207,7 +2214,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) else if (status_byte(cmd->SCp.Status) != GOOD) cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); -#ifdef AUTOSENSE if ((cmd->cmnd[0] == REQUEST_SENSE) && hostdata->ses.cmd_len) { scsi_eh_restore_cmnd(cmd, &hostdata->ses); @@ -2220,22 +2226,17 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) dprintk(NDEBUG_AUTOSENSE, "scsi%d: performing request sense\n", HOSTNO); - local_irq_save(flags); LIST(cmd,hostdata->issue_queue); SET_NEXT(cmd, hostdata->issue_queue); - hostdata->issue_queue = (Scsi_Cmnd *) cmd; - local_irq_restore(flags); + hostdata->issue_queue = (struct scsi_cmnd *) cmd; dprintk(NDEBUG_QUEUES, "scsi%d: REQUEST SENSE added to head of " "issue queue\n", H_NO(cmd)); - } else -#endif /* def AUTOSENSE */ - { -#ifdef NCR5380_STATS - collect_stats(hostdata, cmd); -#endif + } else { cmd->scsi_done(cmd); } + local_irq_restore(flags); + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); /* * Restore phase bits to 0 so an interrupted selection, @@ -2246,12 +2247,14 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected) barrier(); - falcon_dont_release--; + local_irq_save(flags); + hostdata->retain_dma_intr--; /* ++roman: For Falcon SCSI, release the lock on the * ST-DMA here if no other commands are waiting on the * disconnected queue. */ - falcon_release_lock_if_possible(hostdata); + maybe_release_dma_irq(instance); + local_irq_restore(flags); return; case MESSAGE_REJECT: /* Accept message by clearing ACK */ @@ -2303,6 +2306,9 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) /* Wait for bus free to avoid nasty timeouts */ while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected) barrier(); +#ifdef SUN3_SCSI_VME + dregs->csr |= CSR_DMA_ENABLE; +#endif return; /* * The SCSI data pointer is *IMPLICITLY* saved on a disconnect @@ -2384,20 +2390,18 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ default: if (!tmp) { - printk(KERN_DEBUG "scsi%d: rejecting message ", HOSTNO); + printk(KERN_INFO "scsi%d: rejecting message ", + instance->host_no); spi_print_msg(extended_msg); printk("\n"); } else if (tmp != EXTENDED_MESSAGE) - printk(KERN_DEBUG "scsi%d: rejecting unknown " - "message %02x from target %d, lun %llu\n", - HOSTNO, tmp, cmd->device->id, cmd->device->lun); + scmd_printk(KERN_INFO, cmd, + "rejecting unknown message %02x\n", + tmp); else - printk(KERN_DEBUG "scsi%d: rejecting unknown " - "extended message " - "code %02x, length %d from target %d, lun %llu\n", - HOSTNO, extended_msg[1], extended_msg[0], - cmd->device->id, cmd->device->lun); - + scmd_printk(KERN_INFO, cmd, + "rejecting unknown extended message code %02x, length %d\n", + extended_msg[1], extended_msg[0]); msgout = MESSAGE_REJECT; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); @@ -2410,6 +2414,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) hostdata->last_message = msgout; NCR5380_transfer_pio(instance, &phase, &len, &data); if (msgout == ABORT) { + local_irq_save(flags); #ifdef SUPPORT_TAGS cmd_free_tag(cmd); #else @@ -2417,12 +2422,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) #endif hostdata->connected = NULL; cmd->result = DID_ERROR << 16; -#ifdef NCR5380_STATS - collect_stats(hostdata, cmd); -#endif - cmd->scsi_done(cmd); NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - falcon_release_lock_if_possible(hostdata); + maybe_release_dma_irq(instance); + local_irq_restore(flags); + cmd->scsi_done(cmd); return; } msgout = NOP; @@ -2455,7 +2458,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) * Function : void NCR5380_reselect (struct Scsi_Host *instance) * * Purpose : does reselection, initializing the instance->connected - * field to point to the Scsi_Cmnd for which the I_T_L or I_T_L_Q + * field to point to the scsi_cmnd for which the I_T_L or I_T_L_Q * nexus has been reestablished, * * Inputs : instance - this instance of the NCR5380. @@ -2463,19 +2466,21 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ +/* it might eventually prove necessary to do a dma setup on + reselection, but it doesn't seem to be needed now -- sam */ + static void NCR5380_reselect(struct Scsi_Host *instance) { SETUP_HOSTDATA(instance); unsigned char target_mask; - unsigned char lun, phase; - int len; + unsigned char lun; #ifdef SUPPORT_TAGS unsigned char tag; #endif unsigned char msg[3]; - unsigned char *data; - Scsi_Cmnd *tmp = NULL, *prev; -/* unsigned long flags; */ + int __maybe_unused len; + unsigned char __maybe_unused *data, __maybe_unused phase; + struct scsi_cmnd *tmp = NULL, *prev; /* * Disable arbitration, etc. since the host adapter obviously @@ -2511,10 +2516,18 @@ static void NCR5380_reselect(struct Scsi_Host *instance) while (!(NCR5380_read(STATUS_REG) & SR_REQ)) ; +#if defined(CONFIG_SUN3) && defined(REAL_DMA) + /* acknowledge toggle to MSGIN */ + NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(PHASE_MSGIN)); + + /* peek at the byte without really hitting the bus */ + msg[0] = NCR5380_read(CURRENT_SCSI_DATA_REG); +#else len = 1; data = msg; phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); +#endif if (!(msg[0] & 0x80)) { printk(KERN_DEBUG "scsi%d: expecting IDENTIFY message, got ", HOSTNO); @@ -2524,13 +2537,13 @@ static void NCR5380_reselect(struct Scsi_Host *instance) } lun = (msg[0] & 0x07); -#ifdef SUPPORT_TAGS +#if defined(SUPPORT_TAGS) && !defined(CONFIG_SUN3) /* If the phase is still MSGIN, the target wants to send some more * messages. In case it supports tagged queuing, this is probably a * SIMPLE_QUEUE_TAG for the I_T_L_Q nexus. */ tag = TAG_NONE; - if (phase == PHASE_MSGIN && setup_use_tagged_queuing) { + if (phase == PHASE_MSGIN && (hostdata->flags & FLAG_TAGGED_QUEUING)) { /* Accept previous IDENTIFY message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); len = 2; @@ -2548,15 +2561,13 @@ static void NCR5380_reselect(struct Scsi_Host *instance) * just reestablished, and remove it from the disconnected queue. */ - for (tmp = (Scsi_Cmnd *) hostdata->disconnected_queue, prev = NULL; + for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL; tmp; prev = tmp, tmp = NEXT(tmp)) { if ((target_mask == (1 << tmp->device->id)) && (lun == tmp->device->lun) #ifdef SUPPORT_TAGS && (tag == tmp->tag) #endif ) { - /* ++guenther: prevent race with falcon_release_lock */ - falcon_dont_release++; if (prev) { REMOVE(prev, NEXT(prev), tmp, NEXT(tmp)); SET_NEXT(prev, NEXT(tmp)); @@ -2588,26 +2599,67 @@ static void NCR5380_reselect(struct Scsi_Host *instance) return; } +#if defined(CONFIG_SUN3) && defined(REAL_DMA) + /* engage dma setup for the command we just saw */ + { + void *d; + unsigned long count; + + if (!tmp->SCp.this_residual && tmp->SCp.buffers_residual) { + count = tmp->SCp.buffer->length; + d = sg_virt(tmp->SCp.buffer); + } else { + count = tmp->SCp.this_residual; + d = tmp->SCp.ptr; + } + /* setup this command for dma if not already */ + if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != tmp)) { + sun3scsi_dma_setup(d, count, rq_data_dir(tmp->request)); + sun3_dma_setup_done = tmp; + } + } + + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ACK); +#endif + /* Accept message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); +#if defined(SUPPORT_TAGS) && defined(CONFIG_SUN3) + /* If the phase is still MSGIN, the target wants to send some more + * messages. In case it supports tagged queuing, this is probably a + * SIMPLE_QUEUE_TAG for the I_T_L_Q nexus. + */ + tag = TAG_NONE; + if (phase == PHASE_MSGIN && setup_use_tagged_queuing) { + /* Accept previous IDENTIFY message by clearing ACK */ + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + len = 2; + data = msg + 1; + if (!NCR5380_transfer_pio(instance, &phase, &len, &data) && + msg[1] == SIMPLE_QUEUE_TAG) + tag = msg[2]; + dprintk(NDEBUG_TAGS, "scsi%d: target mask %02x, lun %d sent tag %d at reselection\n" + HOSTNO, target_mask, lun, tag); + } +#endif + hostdata->connected = tmp; dprintk(NDEBUG_RESELECTION, "scsi%d: nexus established, target = %d, lun = %llu, tag = %d\n", HOSTNO, tmp->device->id, tmp->device->lun, tmp->tag); - falcon_dont_release--; } /* - * Function : int NCR5380_abort (Scsi_Cmnd *cmd) + * Function : int NCR5380_abort (struct scsi_cmnd *cmd) * * Purpose : abort a command * - * Inputs : cmd - the Scsi_Cmnd to abort, code - code to set the + * Inputs : cmd - the scsi_cmnd to abort, code - code to set the * host byte of the result field to, if zero DID_ABORTED is * used. * - * Returns : 0 - success, -1 on failure. + * Returns : SUCCESS - success, FAILED on failure. * * XXX - there is no way to abort the command that is currently * connected, you have to wait for it to complete. If this is @@ -2616,24 +2668,19 @@ static void NCR5380_reselect(struct Scsi_Host *instance) */ static -int NCR5380_abort(Scsi_Cmnd *cmd) +int NCR5380_abort(struct scsi_cmnd *cmd) { struct Scsi_Host *instance = cmd->device->host; SETUP_HOSTDATA(instance); - Scsi_Cmnd *tmp, **prev; + struct scsi_cmnd *tmp, **prev; unsigned long flags; - printk(KERN_NOTICE "scsi%d: aborting command\n", HOSTNO); - scsi_print_command(cmd); + scmd_printk(KERN_NOTICE, cmd, "aborting command\n"); NCR5380_print_status(instance); local_irq_save(flags); - if (!IS_A_TT() && !falcon_got_lock) - printk(KERN_ERR "scsi%d: !!BINGO!! Falcon has no lock in NCR5380_abort\n", - HOSTNO); - dprintk(NDEBUG_ABORT, "scsi%d: abort called basr 0x%02x, sr 0x%02x\n", HOSTNO, NCR5380_read(BUS_AND_STATUS_REG), NCR5380_read(STATUS_REG)); @@ -2674,12 +2721,12 @@ int NCR5380_abort(Scsi_Cmnd *cmd) #else hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); #endif + maybe_release_dma_irq(instance); local_irq_restore(flags); cmd->scsi_done(cmd); - falcon_release_lock_if_possible(hostdata); return SUCCESS; } else { -/* local_irq_restore(flags); */ + local_irq_restore(flags); printk("scsi%d: abort of connected command failed!\n", HOSTNO); return FAILED; } @@ -2690,21 +2737,21 @@ int NCR5380_abort(Scsi_Cmnd *cmd) * Case 2 : If the command hasn't been issued yet, we simply remove it * from the issue queue. */ - for (prev = (Scsi_Cmnd **)&(hostdata->issue_queue), - tmp = (Scsi_Cmnd *)hostdata->issue_queue; + for (prev = (struct scsi_cmnd **)&(hostdata->issue_queue), + tmp = (struct scsi_cmnd *)hostdata->issue_queue; tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) { if (cmd == tmp) { REMOVE(5, *prev, tmp, NEXT(tmp)); (*prev) = NEXT(tmp); SET_NEXT(tmp, NULL); tmp->result = DID_ABORT << 16; + maybe_release_dma_irq(instance); local_irq_restore(flags); dprintk(NDEBUG_ABORT, "scsi%d: abort removed command from issue queue.\n", HOSTNO); /* Tagged queuing note: no tag to free here, hasn't been assigned * yet... */ tmp->scsi_done(tmp); - falcon_release_lock_if_possible(hostdata); return SUCCESS; } } @@ -2751,13 +2798,13 @@ int NCR5380_abort(Scsi_Cmnd *cmd) * it from the disconnected queue. */ - for (tmp = (Scsi_Cmnd *) hostdata->disconnected_queue; tmp; + for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; tmp = NEXT(tmp)) { if (cmd == tmp) { local_irq_restore(flags); dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO); - if (NCR5380_select(instance, cmd, (int)cmd->tag)) + if (NCR5380_select(instance, cmd)) return FAILED; dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO); @@ -2765,8 +2812,8 @@ int NCR5380_abort(Scsi_Cmnd *cmd) do_abort(instance); local_irq_save(flags); - for (prev = (Scsi_Cmnd **)&(hostdata->disconnected_queue), - tmp = (Scsi_Cmnd *)hostdata->disconnected_queue; + for (prev = (struct scsi_cmnd **)&(hostdata->disconnected_queue), + tmp = (struct scsi_cmnd *)hostdata->disconnected_queue; tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) { if (cmd == tmp) { REMOVE(5, *prev, tmp, NEXT(tmp)); @@ -2782,15 +2829,22 @@ int NCR5380_abort(Scsi_Cmnd *cmd) #else hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); #endif + maybe_release_dma_irq(instance); local_irq_restore(flags); tmp->scsi_done(tmp); - falcon_release_lock_if_possible(hostdata); return SUCCESS; } } } } + /* Maybe it is sufficient just to release the ST-DMA lock... (if + * possible at all) At least, we should check if the lock could be + * released after the abort, in case it is kept due to some bug. + */ + maybe_release_dma_irq(instance); + local_irq_restore(flags); + /* * Case 5 : If we reached this point, the command was not found in any of * the queues. @@ -2801,21 +2855,14 @@ int NCR5380_abort(Scsi_Cmnd *cmd) * broke. */ - local_irq_restore(flags); printk(KERN_INFO "scsi%d: warning : SCSI command probably completed successfully before abortion\n", HOSTNO); - /* Maybe it is sufficient just to release the ST-DMA lock... (if - * possible at all) At least, we should check if the lock could be - * released after the abort, in case it is kept due to some bug. - */ - falcon_release_lock_if_possible(hostdata); - return FAILED; } /* - * Function : int NCR5380_reset (Scsi_Cmnd *cmd) + * Function : int NCR5380_reset (struct scsi_cmnd *cmd) * * Purpose : reset the SCSI bus. * @@ -2823,20 +2870,14 @@ int NCR5380_abort(Scsi_Cmnd *cmd) * */ -static int NCR5380_bus_reset(Scsi_Cmnd *cmd) +static int NCR5380_bus_reset(struct scsi_cmnd *cmd) { - SETUP_HOSTDATA(cmd->device->host); + struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); int i; unsigned long flags; -#if defined(RESET_RUN_DONE) - Scsi_Cmnd *connected, *disconnected_queue; -#endif - - if (!IS_A_TT() && !falcon_got_lock) - printk(KERN_ERR "scsi%d: !!BINGO!! Falcon has no lock in NCR5380_reset\n", - H_NO(cmd)); - NCR5380_print_status(cmd->device->host); + NCR5380_print_status(instance); /* get in phase */ NCR5380_write(TARGET_COMMAND_REG, @@ -2853,89 +2894,6 @@ static int NCR5380_bus_reset(Scsi_Cmnd *cmd) * through anymore ... */ (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); - /* MSch 20140115 - looking at the generic NCR5380 driver, all of this - * should go. - * Catch-22: if we don't clear all queues, the SCSI driver lock will - * not be reset by atari_scsi_reset()! - */ - -#if defined(RESET_RUN_DONE) - /* XXX Should now be done by midlevel code, but it's broken XXX */ - /* XXX see below XXX */ - - /* MSch: old-style reset: actually abort all command processing here */ - - /* After the reset, there are no more connected or disconnected commands - * and no busy units; to avoid problems with re-inserting the commands - * into the issue_queue (via scsi_done()), the aborted commands are - * remembered in local variables first. - */ - local_irq_save(flags); - connected = (Scsi_Cmnd *)hostdata->connected; - hostdata->connected = NULL; - disconnected_queue = (Scsi_Cmnd *)hostdata->disconnected_queue; - hostdata->disconnected_queue = NULL; -#ifdef SUPPORT_TAGS - free_all_tags(); -#endif - for (i = 0; i < 8; ++i) - hostdata->busy[i] = 0; -#ifdef REAL_DMA - hostdata->dma_len = 0; -#endif - local_irq_restore(flags); - - /* In order to tell the mid-level code which commands were aborted, - * set the command status to DID_RESET and call scsi_done() !!! - * This ultimately aborts processing of these commands in the mid-level. - */ - - if ((cmd = connected)) { - dprintk(NDEBUG_ABORT, "scsi%d: reset aborted a connected command\n", H_NO(cmd)); - cmd->result = (cmd->result & 0xffff) | (DID_RESET << 16); - cmd->scsi_done(cmd); - } - - for (i = 0; (cmd = disconnected_queue); ++i) { - disconnected_queue = NEXT(cmd); - SET_NEXT(cmd, NULL); - cmd->result = (cmd->result & 0xffff) | (DID_RESET << 16); - cmd->scsi_done(cmd); - } - if (i > 0) - dprintk(NDEBUG_ABORT, "scsi: reset aborted %d disconnected command(s)\n", i); - - /* The Falcon lock should be released after a reset... - */ - /* ++guenther: moved to atari_scsi_reset(), to prevent a race between - * unlocking and enabling dma interrupt. - */ -/* falcon_release_lock_if_possible( hostdata );*/ - - /* since all commands have been explicitly terminated, we need to tell - * the midlevel code that the reset was SUCCESSFUL, and there is no - * need to 'wake up' the commands by a request_sense - */ - return SUCCESS; -#else /* 1 */ - - /* MSch: new-style reset handling: let the mid-level do what it can */ - - /* ++guenther: MID-LEVEL IS STILL BROKEN. - * Mid-level is supposed to requeue all commands that were active on the - * various low-level queues. In fact it does this, but that's not enough - * because all these commands are subject to timeout. And if a timeout - * happens for any removed command, *_abort() is called but all queues - * are now empty. Abort then gives up the falcon lock, which is fatal, - * since the mid-level will queue more commands and must have the lock - * (it's all happening inside timer interrupt handler!!). - * Even worse, abort will return NOT_RUNNING for all those commands not - * on any queue, so they won't be retried ... - * - * Conclusion: either scsi.c disables timeout for all resetted commands - * immediately, or we lose! As of linux-2.0.20 it doesn't. - */ - /* After the reset, there are no more connected or disconnected commands * and no busy units; so clear the low-level status here to avoid * conflicts when the mid-level code tries to wake up the affected @@ -2954,16 +2912,16 @@ static int NCR5380_bus_reset(Scsi_Cmnd *cmd) hostdata->connected = NULL; hostdata->disconnected_queue = NULL; #ifdef SUPPORT_TAGS - free_all_tags(); + free_all_tags(hostdata); #endif for (i = 0; i < 8; ++i) hostdata->busy[i] = 0; #ifdef REAL_DMA hostdata->dma_len = 0; #endif + + maybe_release_dma_irq(instance); local_irq_restore(flags); - /* we did no complete reset of all commands, so a wakeup is required */ return SUCCESS; -#endif /* 1 */ } |
