/*
* NCR 5380 generic driver routines. These should make it *trivial*
- * to implement 5380 SCSI drivers under Linux with a non-trantor
- * architecture.
+ * to implement 5380 SCSI drivers under Linux with a non-trantor
+ * architecture.
*
- * Note that these routines also work with NR53c400 family chips.
+ * Note that these routines also work with NR53c400 family chips.
*
* Copyright 1993, Drew Eckhardt
- * Visionary Computing
- * (Unix and Linux consulting and custom programming)
- * drew@colorado.edu
- * +1 (303) 666-5836
+ * Visionary Computing
+ * (Unix and Linux consulting and custom programming)
+ * drew@colorado.edu
+ * +1 (303) 666-5836
*
* For more information, please consult
*
* 1+ (800) 334-5454
*/
-/*
- * ++roman: To port the 5380 driver to the Atari, I had to do some changes in
- * this file, too:
- *
- * - Some of the debug statements were incorrect (undefined variables and the
- * like). I fixed that.
- *
- * - In information_transfer(), I think a #ifdef was wrong. Looking at the
- * possible DMA transfer size should also happen for REAL_DMA. I added this
- * in the #if statement.
- *
- * - When using real DMA, information_transfer() should return in a DATAOUT
- * phase after starting the DMA. It has nothing more to do.
- *
- * - The interrupt service routine should run main after end of DMA, too (not
- * only after RESELECTION interrupts). Additionally, it should _not_ test
- * for more interrupts after running main, since a DMA process may have
- * been started and interrupts are turned on now. The new int could happen
- * inside the execution of NCR5380_intr(), leading to recursive
- * calls.
- *
- * - I've added a function merge_contiguous_buffers() that tries to
- * merge scatter-gather buffers that are located at contiguous
- * physical addresses and can be processed with the same DMA setup.
- * Since most scatter-gather operations work on a page (4K) of
- * 4 buffers (1K), in more than 90% of all cases three interrupts and
- * DMA setup actions are saved.
- *
- * - I've deleted all the stuff for AUTOPROBE_IRQ, REAL_DMA_POLL, PSEUDO_DMA
- * and USLEEP, because these were messing up readability and will never be
- * needed for Atari SCSI.
- *
- * - I've revised the NCR5380_main() calling scheme (relax the 'main_running'
- * stuff), and 'main' is executed in a bottom half if awoken by an
- * interrupt.
- *
- * - The code was quite cluttered up by "#if (NDEBUG & NDEBUG_*) printk..."
- * constructs. In my eyes, this made the source rather unreadable, so I
- * finally replaced that by the *_PRINTK() macros.
- *
- */
+/* Ported to Atari by Roman Hodek and others. */
/* Adapted for the sun3 by Sam Creasey. */
-#if (NDEBUG & NDEBUG_LISTS)
-#define LIST(x, y) \
- do { \
- printk("LINE:%d Adding %p to %p\n", \
- __LINE__, (void*)(x), (void*)(y)); \
- if ((x) == (y)) \
- udelay(5); \
- } while (0)
-#define REMOVE(w, x, y, z) \
- do { \
- printk("LINE:%d Removing: %p->%p %p->%p \n", \
- __LINE__, (void*)(w), (void*)(x), \
- (void*)(y), (void*)(z)); \
- if ((x) == (y)) \
- udelay(5); \
- } while (0)
-#else
-#define LIST(x,y)
-#define REMOVE(w,x,y,z)
-#endif
-
/*
* Design
*
*
* These macros control options :
* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
- * for commands that return with a CHECK CONDITION status.
+ * for commands that return with a CHECK CONDITION status.
*
* DIFFERENTIAL - if defined, NCR53c81 chips will use external differential
- * transceivers.
+ * transceivers.
*
* REAL_DMA - if defined, REAL DMA is used during the data transfer phases.
*
* NCR5380_write(register, value) - write to the specific register
*
* NCR5380_implementation_fields - additional fields needed for this
- * specific implementation of the NCR5380
+ * 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.
* Note that the DMA setup functions should return the number of bytes
- * that they were able to program the controller for.
+ * that they were able to program the controller for.
*
* Also note that generic i386/PC versions of these macros are
- * available as NCR5380_i386_dma_write_setup,
- * NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual.
+ * available as NCR5380_i386_dma_write_setup,
+ * NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual.
*
* NCR5380_dma_write_setup(instance, src, count) - initialize
* NCR5380_dma_read_setup(instance, dst, count) - initialize
* possible) function may be used.
*/
-/* 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) ((struct scsi_cmnd *)(cmd)->host_scribble)
-#define SET_NEXT(cmd,next) ((cmd)->host_scribble = (void *)(next))
-#define NEXTADDR(cmd) ((struct scsi_cmnd **)&(cmd)->host_scribble)
-
-#define HOSTNO instance->host_no
-
static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
#endif /* SUPPORT_TAGS */
-
-/*
- * 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: 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.
+/**
+ * merge_contiguous_buffers - coalesce scatter-gather list entries
+ * @cmd: command requesting IO
+ *
+ * Try to merge several scatter-gather buffers into one DMA transfer.
+ * This is possible if the scatter buffers lie on physically
+ * contiguous addresses. The first scatter-gather buffer's data are
+ * assumed to be already transferred into cmd->SCp.this_residual.
+ * Every buffer merged avoids an interrupt and a DMA setup operation.
*/
static void merge_contiguous_buffers(struct scsi_cmnd *cmd)
cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
cmd->SCp.this_residual = cmd->SCp.buffer->length;
- /* ++roman: Try to merge some scatter-buffers if they are at
- * contiguous physical addresses.
- */
+
merge_contiguous_buffers(cmd);
} else {
cmd->SCp.buffer = NULL;
cmd->SCp.ptr = NULL;
cmd->SCp.this_residual = 0;
}
+
+ cmd->SCp.Status = 0;
+ cmd->SCp.Message = 0;
}
/**
unsigned char mask;
const char *name;
} signals[] = {
- { SR_DBP, "PARITY"}, { SR_RST, "RST" }, { SR_BSY, "BSY" },
- { SR_REQ, "REQ" }, { SR_MSG, "MSG" }, { SR_CD, "CD" }, { SR_IO, "IO" },
- { SR_SEL, "SEL" }, {0, NULL}
-}, basrs[] = {
- {BASR_ATN, "ATN"}, {BASR_ACK, "ACK"}, {0, NULL}
-}, icrs[] = {
- {ICR_ASSERT_RST, "ASSERT RST"},{ICR_ASSERT_ACK, "ASSERT ACK"},
- {ICR_ASSERT_BSY, "ASSERT BSY"}, {ICR_ASSERT_SEL, "ASSERT SEL"},
- {ICR_ASSERT_ATN, "ASSERT ATN"}, {ICR_ASSERT_DATA, "ASSERT DATA"},
+ {SR_DBP, "PARITY"},
+ {SR_RST, "RST"},
+ {SR_BSY, "BSY"},
+ {SR_REQ, "REQ"},
+ {SR_MSG, "MSG"},
+ {SR_CD, "CD"},
+ {SR_IO, "IO"},
+ {SR_SEL, "SEL"},
+ {0, NULL}
+},
+basrs[] = {
+ {BASR_ATN, "ATN"},
+ {BASR_ACK, "ACK"},
+ {0, NULL}
+},
+icrs[] = {
+ {ICR_ASSERT_RST, "ASSERT RST"},
+ {ICR_ASSERT_ACK, "ASSERT ACK"},
+ {ICR_ASSERT_BSY, "ASSERT BSY"},
+ {ICR_ASSERT_SEL, "ASSERT SEL"},
+ {ICR_ASSERT_ATN, "ASSERT ATN"},
+ {ICR_ASSERT_DATA, "ASSERT DATA"},
{0, NULL}
-}, mrs[] = {
- {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, {MR_TARGET, "MODE TARGET"},
- {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, {MR_ENABLE_PAR_INTR,
- "MODE PARITY INTR"}, {MR_ENABLE_EOP_INTR,"MODE EOP INTR"},
+},
+mrs[] = {
+ {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
+ {MR_TARGET, "MODE TARGET"},
+ {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
+ {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
+ {MR_ENABLE_EOP_INTR, "MODE EOP INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
- {MR_DMA_MODE, "MODE DMA"}, {MR_ARBITRATE, "MODE ARBITRATION"},
+ {MR_DMA_MODE, "MODE DMA"},
+ {MR_ARBITRATE, "MODE ARBITRATION"},
{0, NULL}
};
unsigned char value;
const char *name;
} phases[] = {
- {PHASE_DATAOUT, "DATAOUT"}, {PHASE_DATAIN, "DATAIN"}, {PHASE_CMDOUT, "CMDOUT"},
- {PHASE_STATIN, "STATIN"}, {PHASE_MSGOUT, "MSGOUT"}, {PHASE_MSGIN, "MSGIN"},
+ {PHASE_DATAOUT, "DATAOUT"},
+ {PHASE_DATAIN, "DATAIN"},
+ {PHASE_CMDOUT, "CMDOUT"},
+ {PHASE_STATIN, "STATIN"},
+ {PHASE_MSGOUT, "MSGOUT"},
+ {PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
- *
- * Locks: none
*/
static void NCR5380_print_phase(struct Scsi_Host *instance)
status = NCR5380_read(STATUS_REG);
if (!(status & SR_REQ))
- printk(KERN_DEBUG "scsi%d: REQ not asserted, phase unknown.\n", HOSTNO);
+ shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n");
else {
for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
(phases[i].value != (status & PHASE_MASK)); ++i)
;
- printk(KERN_DEBUG "scsi%d: phase %s\n", HOSTNO, phases[i].name);
+ shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name);
}
}
-
#endif
/**
* @instance: relevant scsi host instance
*
* For use as the host template info() handler.
- *
- * Locks: none
*/
static const char *NCR5380_info(struct Scsi_Host *instance)
static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
int i;
- SETUP_HOSTDATA(instance);
unsigned long deadline;
hostdata->host = instance;
#endif
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
- hostdata->issue_queue = NULL;
- hostdata->disconnected_queue = NULL;
+ hostdata->sensing = NULL;
+ INIT_LIST_HEAD(&hostdata->autosense);
+ INIT_LIST_HEAD(&hostdata->unissued);
+ INIT_LIST_HEAD(&hostdata->disconnected);
+
hostdata->flags = flags;
INIT_WORK(&hostdata->main_task, NCR5380_main);
destroy_workqueue(hostdata->work_q);
}
+/**
+ * complete_cmd - finish processing a command and return it to the SCSI ML
+ * @instance: the host instance
+ * @cmd: command to complete
+ */
+
+static void complete_cmd(struct Scsi_Host *instance,
+ struct scsi_cmnd *cmd)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+
+ dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd);
+
+ if (hostdata->sensing == cmd) {
+ /* Autosense processing ends here */
+ if ((cmd->result & 0xff) != SAM_STAT_GOOD) {
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ set_host_byte(cmd, DID_ERROR);
+ } else
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ hostdata->sensing = NULL;
+ }
+
+#ifdef SUPPORT_TAGS
+ cmd_free_tag(cmd);
+#else
+ hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
+#endif
+ cmd->scsi_done(cmd);
+}
+
/**
* NCR5380_queue_command - queue a command
* @instance: the relevant SCSI adapter
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- struct scsi_cmnd *tmp;
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
unsigned long flags;
#if (NDEBUG & NDEBUG_NO_WRITE)
}
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
- /*
- * We use the host_scribble field as a pointer to the next command
- * in a queue
- */
-
- SET_NEXT(cmd, NULL);
cmd->result = 0;
/*
- * 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.
- */
-
- /* ++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
- * atari_scsi.c. If we insert first, then it's impossible for this driver
- * to release the lock.
- * Stop timer for this command while waiting for the lock, or timeouts
- * may happen (and they really do), and it's no good if the command doesn't
- * appear in any of the queues.
* ++roman: Just disabling the NCR interrupt isn't sufficient here,
* because also a timer int can trigger an abort or reset, which would
* alter queues and touch the lock.
* 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 = (struct scsi_cmnd *)hostdata->issue_queue;
- NEXT(tmp); tmp = NEXT(tmp))
- ;
- LIST(cmd, tmp);
- SET_NEXT(tmp, cmd);
- }
+ if (cmd->cmnd[0] == REQUEST_SENSE)
+ list_add(&ncmd->list, &hostdata->unissued);
+ else
+ list_add_tail(&ncmd->list, &hostdata->unissued);
+
spin_unlock_irqrestore(&hostdata->lock, flags);
dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
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 &&
+ if (list_empty(&hostdata->disconnected) &&
+ list_empty(&hostdata->unissued) &&
+ list_empty(&hostdata->autosense) &&
!hostdata->connected &&
- !hostdata->retain_dma_intr)
+ !hostdata->selecting)
NCR5380_release_dma_irq(instance);
}
+/**
+ * dequeue_next_cmd - dequeue a command for processing
+ * @instance: the scsi host instance
+ *
+ * Priority is given to commands on the autosense queue. These commands
+ * need autosense because of a CHECK CONDITION result.
+ *
+ * Returns a command pointer if a command is found for a target that is
+ * not already busy. Otherwise returns NULL.
+ */
+
+static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ struct NCR5380_cmd *ncmd;
+ struct scsi_cmnd *cmd;
+
+ if (list_empty(&hostdata->autosense)) {
+ list_for_each_entry(ncmd, &hostdata->unissued, list) {
+ cmd = NCR5380_to_scmd(ncmd);
+ dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n",
+ cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun);
+
+ if (
+#ifdef SUPPORT_TAGS
+ !is_lun_busy(cmd, 1)
+#else
+ !(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))
+#endif
+ ) {
+ list_del(&ncmd->list);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "dequeue: removed %p from issue queue\n", cmd);
+ return cmd;
+ }
+ }
+ } else {
+ /* Autosense processing begins here */
+ ncmd = list_first_entry(&hostdata->autosense,
+ struct NCR5380_cmd, list);
+ list_del(&ncmd->list);
+ cmd = NCR5380_to_scmd(ncmd);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "dequeue: removed %p from autosense queue\n", cmd);
+ scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
+ hostdata->sensing = cmd;
+ return cmd;
+ }
+ return NULL;
+}
+
+static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
+
+ if (hostdata->sensing) {
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ list_add(&ncmd->list, &hostdata->autosense);
+ hostdata->sensing = NULL;
+ } else
+ list_add(&ncmd->list, &hostdata->unissued);
+}
+
/**
* NCR5380_main - NCR state machines
*
* 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.
- *
- * Locks: called as its own thread with no locks held.
*/
static void NCR5380_main(struct work_struct *work)
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
- struct scsi_cmnd *tmp, *prev;
+ struct scsi_cmnd *cmd;
int done;
/*
* alter queues and touch the Falcon lock.
*/
- spin_lock_irq(&hostdata->lock);
do {
done = 1;
- if (!hostdata->connected) {
- dprintk(NDEBUG_MAIN, "scsi%d: not connected\n", HOSTNO);
+ spin_lock_irq(&hostdata->lock);
+ while (!hostdata->connected &&
+ (cmd = dequeue_next_cmd(instance))) {
+
+ dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd);
+
/*
- * Search through the issue_queue for a command destined
- * for a target that's not busy.
+ * Attempt to establish an I_T_L nexus here.
+ * On success, instance->hostdata->connected is set.
+ * On failure, we must add the command back to the
+ * issue queue so we can keep trying.
+ */
+ /*
+ * REQUEST SENSE commands are issued without tagged
+ * queueing, even on SCSI-II devices because the
+ * contingent allegiance condition exists for the
+ * entire unit.
+ */
+ /* ++roman: ...and the standard also requires that
+ * REQUEST SENSE command are untagged.
*/
-#if (NDEBUG & NDEBUG_LISTS)
- for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL;
- tmp && (tmp != prev); prev = tmp, tmp = NEXT(tmp))
- ;
- /*printk("%p ", tmp);*/
- if ((tmp == prev) && tmp)
- printk(" LOOP\n");
- /* else printk("\n"); */
-#endif
- for (tmp = (struct scsi_cmnd *) hostdata->issue_queue,
- prev = NULL; tmp; prev = tmp, tmp = NEXT(tmp)) {
- u8 lun = tmp->device->lun;
-
- 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. */
- if (
-#ifdef SUPPORT_TAGS
- !is_lun_busy( tmp, tmp->cmnd[0] != REQUEST_SENSE)
-#else
- !(hostdata->busy[tmp->device->id] & (1 << lun))
-#endif
- ) {
- if (prev) {
- REMOVE(prev, NEXT(prev), tmp, NEXT(tmp));
- SET_NEXT(prev, NEXT(tmp));
- } else {
- REMOVE(-1, hostdata->issue_queue, tmp, NEXT(tmp));
- hostdata->issue_queue = NEXT(tmp);
- }
- SET_NEXT(tmp, NULL);
- hostdata->retain_dma_intr++;
-
- /*
- * Attempt to establish an I_T_L nexus here.
- * On success, instance->hostdata->connected is set.
- * On failure, we must add the command back to the
- * issue queue so we can keep trying.
- */
- dprintk(NDEBUG_MAIN, "scsi%d: main(): command for target %d "
- "lun %d removed from issue_queue\n",
- HOSTNO, tmp->device->id, lun);
- /*
- * REQUEST SENSE commands are issued without tagged
- * queueing, even on SCSI-II devices because the
- * contingent allegiance condition exists for the
- * entire unit.
- */
- /* ++roman: ...and the standard also requires that
- * REQUEST SENSE command are untagged.
- */
#ifdef SUPPORT_TAGS
- cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE);
+ cmd_get_tag(cmd, cmd->cmnd[0] != REQUEST_SENSE);
#endif
- if (!NCR5380_select(instance, tmp)) {
- /* OK or bad target */
- hostdata->retain_dma_intr--;
- maybe_release_dma_irq(instance);
- } else {
- /* Need to retry */
- LIST(tmp, hostdata->issue_queue);
- SET_NEXT(tmp, hostdata->issue_queue);
- hostdata->issue_queue = tmp;
+ cmd = NCR5380_select(instance, cmd);
+ if (!cmd) {
+ dsprintk(NDEBUG_MAIN, instance, "main: select complete\n");
+ maybe_release_dma_irq(instance);
+ } else {
+ dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance,
+ "main: select failed, returning %p to queue\n", cmd);
+ requeue_cmd(instance, cmd);
#ifdef SUPPORT_TAGS
- cmd_free_tag(tmp);
+ cmd_free_tag(cmd);
#endif
- hostdata->retain_dma_intr--;
- done = 0;
- dprintk(NDEBUG_MAIN, "scsi%d: main(): select() failed, "
- "returned to issue_queue\n", HOSTNO);
- }
- if (hostdata->connected)
- break;
- } /* if target/lun/target queue is not busy */
- } /* for issue_queue */
- } /* if (!hostdata->connected) */
-
+ }
+ }
if (hostdata->connected
#ifdef REAL_DMA
&& !hostdata->dma_len
#endif
) {
- dprintk(NDEBUG_MAIN, "scsi%d: main: performing information transfer\n",
- HOSTNO);
+ dsprintk(NDEBUG_MAIN, instance, "main: performing information transfer\n");
NCR5380_information_transfer(instance);
- dprintk(NDEBUG_MAIN, "scsi%d: main: done set false\n", HOSTNO);
done = 0;
}
+ spin_unlock_irq(&hostdata->lock);
+ if (!done)
+ cond_resched();
} while (!done);
- spin_unlock_irq(&hostdata->lock);
}
* Function : void NCR5380_dma_complete (struct Scsi_Host *instance)
*
* Purpose : Called by interrupt handler when DMA finishes or a phase
- * mismatch occurs (which would finish the DMA transfer).
+ * mismatch occurs (which would finish the DMA transfer).
*
* Inputs : instance - this instance of the NCR5380.
- *
*/
static void NCR5380_dma_complete(struct Scsi_Host *instance)
{
- SETUP_HOSTDATA(instance);
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
int transferred;
unsigned char **data;
- volatile int *count;
+ int *count;
int saved_data = 0, overrun = 0;
unsigned char p;
(BASR_PHASE_MATCH|BASR_ACK)) {
saved_data = NCR5380_read(INPUT_DATA_REG);
overrun = 1;
- dprintk(NDEBUG_DMA, "scsi%d: read overrun handled\n", HOSTNO);
+ dsprintk(NDEBUG_DMA, instance, "read overrun handled\n");
}
}
}
unsigned char mr = NCR5380_read(MODE_REG);
unsigned char sr = NCR5380_read(STATUS_REG);
- dprintk(NDEBUG_INTR, "scsi%d: IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n",
- HOSTNO, irq, basr, sr, mr);
+ dsprintk(NDEBUG_INTR, instance, "IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n",
+ irq, basr, sr, mr);
#if defined(REAL_DMA)
if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) {
* for End of DMA errata need to happen in DMA Mode.
*/
- dprintk(NDEBUG_INTR, "scsi%d: interrupt in DMA mode\n", HOSTNO);
+ dsprintk(NDEBUG_INTR, instance, "interrupt in DMA mode\n");
if (hostdata->connected) {
NCR5380_dma_complete(instance);
NCR5380_write(SELECT_ENABLE_REG, 0);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- dprintk(NDEBUG_INTR, "scsi%d: interrupt with SEL and IO\n",
- HOSTNO);
+ dsprintk(NDEBUG_INTR, instance, "interrupt with SEL and IO\n");
if (!hostdata->connected) {
NCR5380_reselect(instance);
/* Probably Bus Reset */
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt\n", HOSTNO);
+ dsprintk(NDEBUG_INTR, instance, "unknown interrupt\n");
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
/*
* Function : int NCR5380_select(struct Scsi_Host *instance,
- * struct scsi_cmnd *cmd)
+ * 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.
+ * 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.
+ * target lives, cmd - SCSI command to execute.
*
- * Returns : -1 if selection failed but should be retried.
- * 0 if selection failed and should not be retried.
- * 0 if selection succeeded completely (hostdata->connected == cmd).
+ * Returns cmd if selection failed but should be retried,
+ * NULL if selection failed and should not be retried, or
+ * NULL if selection succeeded (hostdata->connected == cmd).
*
* Side effects :
- * If bus busy, arbitration failed, etc, NCR5380_select() will exit
- * with registers as they should have been on entry - ie
- * SELECT_ENABLE will be set appropriately, the NCR5380
- * will cease to drive any SCSI bus signals.
+ * If bus busy, arbitration failed, etc, NCR5380_select() will exit
+ * with registers as they should have been on entry - ie
+ * SELECT_ENABLE will be set appropriately, the NCR5380
+ * will cease to drive any SCSI bus signals.
*
- * If successful : I_T_L or I_T_L_Q nexus will be established,
- * instance->connected will be set to cmd.
- * SELECT interrupt will be disabled.
+ * If successful : I_T_L or I_T_L_Q nexus will be established,
+ * instance->connected will be set to cmd.
+ * SELECT interrupt will be disabled.
*
- * If failed (no target) : cmd->scsi_done() will be called, and the
- * cmd->result host byte set to DID_BAD_TARGET.
+ * If failed (no target) : cmd->scsi_done() will be called, and the
+ * cmd->result host byte set to DID_BAD_TARGET.
*/
-static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
+static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
+ struct scsi_cmnd *cmd)
{
- SETUP_HOSTDATA(instance);
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char tmp[3], phase;
unsigned char *data;
int len;
int err;
NCR5380_dprint(NDEBUG_ARBITRATION, instance);
- dprintk(NDEBUG_ARBITRATION, "scsi%d: starting arbitration, id = %d\n", HOSTNO,
- instance->this_id);
+ dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n",
+ instance->this_id);
+
+ /*
+ * Arbitration and selection phases are slow and involve dropping the
+ * lock, so we have to watch out for EH. An exception handler may
+ * change 'selecting' to NULL. This function will then return NULL
+ * so that the caller will forget about 'cmd'. (During information
+ * transfer phases, EH may change 'connected' to NULL.)
+ */
+ hostdata->selecting = cmd;
/*
* Set the phase bits to 0, otherwise the NCR5380 won't drive the
spin_lock_irq(&hostdata->lock);
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) {
/* Reselection interrupt */
- return -1;
+ goto out;
}
if (err < 0) {
NCR5380_write(MODE_REG, MR_BASE);
shost_printk(KERN_ERR, instance,
"select: arbitration timeout\n");
- return -1;
+ goto out;
}
spin_unlock_irq(&hostdata->lock);
(NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) ||
(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
- dprintk(NDEBUG_ARBITRATION, "scsi%d: lost arbitration, deasserting MR_ARBITRATE\n",
- HOSTNO);
+ dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n");
spin_lock_irq(&hostdata->lock);
- return -1;
+ goto out;
}
/* After/during arbitration, BSY should be asserted.
/* NCR5380_reselect() clears MODE_REG after a reselection interrupt */
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE))
- return -1;
+ goto out;
- dprintk(NDEBUG_ARBITRATION, "scsi%d: won arbitration\n", HOSTNO);
+ if (!hostdata->selecting) {
+ NCR5380_write(MODE_REG, MR_BASE);
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ goto out;
+ }
+
+ dsprintk(NDEBUG_ARBITRATION, instance, "won arbitration\n");
/*
* Now that we have won arbitration, start Selection process, asserting
* the host and target ID's on the SCSI bus.
*/
- NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << cmd->device->id)));
+ NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask | (1 << scmd_id(cmd)));
/*
* Raise ATN while SEL is true before BSY goes false from arbitration,
* phase immediately after selection.
*/
- NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY |
- ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL ));
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY |
+ ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL);
NCR5380_write(MODE_REG, MR_BASE);
/*
udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
/* Reset BSY */
- NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA |
- ICR_ASSERT_ATN | ICR_ASSERT_SEL));
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA |
+ ICR_ASSERT_ATN | ICR_ASSERT_SEL);
/*
* Something weird happens when we cease to drive BSY - looks
udelay(1);
- dprintk(NDEBUG_SELECTION, "scsi%d: selecting target %d\n", HOSTNO, cmd->device->id);
+ dsprintk(NDEBUG_SELECTION, instance, "selecting target %d\n", scmd_id(cmd));
/*
* The SCSI specification calls for a 250 ms timeout for the actual
NCR5380_reselect(instance);
if (!hostdata->connected)
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- printk(KERN_ERR "scsi%d: reselection after won arbitration?\n",
- HOSTNO);
- return -1;
+ shost_printk(KERN_ERR, instance, "reselection after won arbitration?\n");
+ goto out;
}
if (err < 0) {
spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- cmd->result = DID_BAD_TARGET << 16;
-#ifdef SUPPORT_TAGS
- cmd_free_tag(cmd);
-#endif
- cmd->scsi_done(cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- dprintk(NDEBUG_SELECTION, "scsi%d: target did not respond within 250ms\n", HOSTNO);
- return 0;
+ /* Can't touch cmd if it has been reclaimed by the scsi ML */
+ if (hostdata->selecting) {
+ cmd->result = DID_BAD_TARGET << 16;
+ complete_cmd(instance, cmd);
+ dsprintk(NDEBUG_SELECTION, instance, "target did not respond within 250ms\n");
+ cmd = NULL;
+ }
+ goto out;
}
/*
* until it wraps back to 0.
*
* XXX - it turns out that there are some broken SCSI-II devices,
- * which claim to support tagged queuing but fail when more than
- * some number of commands are issued at once.
+ * which claim to support tagged queuing but fail when more than
+ * some number of commands are issued at once.
*/
/* Wait for start of REQ/ACK handshake */
shost_printk(KERN_ERR, instance, "select: REQ timeout\n");
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- return -1;
+ goto out;
+ }
+ if (!hostdata->selecting) {
+ do_abort(instance);
+ goto out;
}
- dprintk(NDEBUG_SELECTION, "scsi%d: target %d selected, going into MESSAGE OUT phase.\n",
- HOSTNO, cmd->device->id);
+ dsprintk(NDEBUG_SELECTION, instance, "target %d selected, going into MESSAGE OUT phase.\n",
+ scmd_id(cmd));
tmp[0] = IDENTIFY(1, cmd->device->lun);
#ifdef SUPPORT_TAGS
data = tmp;
phase = PHASE_MSGOUT;
NCR5380_transfer_pio(instance, &phase, &len, &data);
- dprintk(NDEBUG_SELECTION, "scsi%d: nexus established.\n", HOSTNO);
+ dsprintk(NDEBUG_SELECTION, instance, "nexus established.\n");
/* XXX need to handle errors here */
hostdata->connected = cmd;
#ifndef SUPPORT_TAGS
- hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
+ hostdata->busy[cmd->device->id] |= 1 << cmd->device->lun;
#endif
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
initialize_SCp(cmd);
- return 0;
+ cmd = NULL;
+
+out:
+ if (!hostdata->selecting)
+ return NULL;
+ hostdata->selecting = NULL;
+ return cmd;
}
/*
* Function : int NCR5380_transfer_pio (struct Scsi_Host *instance,
- * unsigned char *phase, int *count, unsigned char **data)
+ * unsigned char *phase, int *count, unsigned char **data)
*
* Purpose : transfers data in given phase using polled I/O
*
* Inputs : instance - instance of driver, *phase - pointer to
- * what phase is expected, *count - pointer to number of
- * bytes to transfer, **data - pointer to data pointer.
+ * what phase is expected, *count - pointer to number of
+ * bytes to transfer, **data - pointer to data pointer.
*
* Returns : -1 when different phase is entered without transferring
- * maximum number of bytes, 0 if all bytes are transferred or exit
- * is in same phase.
+ * maximum number of bytes, 0 if all bytes are transferred or exit
+ * is in same phase.
*
- * Also, *phase, *count, *data are modified in place.
+ * Also, *phase, *count, *data are modified in place.
*
* XXX Note : handling for bus free may be useful.
*/
unsigned char *phase, int *count,
unsigned char **data)
{
- register unsigned char p = *phase, tmp;
- register int c = *count;
- register unsigned char *d = *data;
+ unsigned char p = *phase, tmp;
+ int c = *count;
+ unsigned char *d = *data;
/*
* The NCR5380 chip will only drive the SCSI bus when the
if (NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ) < 0)
break;
- dprintk(NDEBUG_HANDSHAKE, "scsi%d: REQ detected\n", HOSTNO);
+ dsprintk(NDEBUG_HANDSHAKE, instance, "REQ asserted\n");
/* Check for phase mismatch */
if ((NCR5380_read(STATUS_REG) & PHASE_MASK) != p) {
- dprintk(NDEBUG_PIO, "scsi%d: phase mismatch\n", HOSTNO);
+ dsprintk(NDEBUG_PIO, instance, "phase mismatch\n");
NCR5380_dprint_phase(NDEBUG_PIO, instance);
break;
}
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA);
NCR5380_dprint(NDEBUG_PIO, instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
- ICR_ASSERT_DATA | ICR_ASSERT_ACK);
+ ICR_ASSERT_DATA | ICR_ASSERT_ACK);
} else {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
- ICR_ASSERT_DATA | ICR_ASSERT_ATN);
+ ICR_ASSERT_DATA | ICR_ASSERT_ATN);
NCR5380_dprint(NDEBUG_PIO, instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
- ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
+ ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
}
} else {
NCR5380_dprint(NDEBUG_PIO, instance);
STATUS_REG, SR_REQ, 0, 5 * HZ) < 0)
break;
- dprintk(NDEBUG_HANDSHAKE, "scsi%d: req false, handshake complete\n", HOSTNO);
+ dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n");
- /*
- * We have several special cases to consider during REQ/ACK handshaking :
- * 1. We were in MSGOUT phase, and we are on the last byte of the
- * message. ATN must be dropped as ACK is dropped.
- *
- * 2. We are in a MSGIN phase, and we are on the last byte of the
- * message. We must exit with ACK asserted, so that the calling
- * code may raise ATN before dropping ACK to reject the message.
- *
- * 3. ACK and ATN are clear and the target may proceed as normal.
- */
+/*
+ * We have several special cases to consider during REQ/ACK handshaking :
+ * 1. We were in MSGOUT phase, and we are on the last byte of the
+ * message. ATN must be dropped as ACK is dropped.
+ *
+ * 2. We are in a MSGIN phase, and we are on the last byte of the
+ * message. We must exit with ACK asserted, so that the calling
+ * code may raise ATN before dropping ACK to reject the message.
+ *
+ * 3. ACK and ATN are clear and the target may proceed as normal.
+ */
if (!(p == PHASE_MSGIN && c == 1)) {
if (p == PHASE_MSGOUT && c > 1)
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
}
} while (--c);
- dprintk(NDEBUG_PIO, "scsi%d: residual %d\n", HOSTNO, c);
+ dsprintk(NDEBUG_PIO, instance, "residual %d\n", c);
*count = c;
*data = d;
static int do_abort(struct Scsi_Host *instance)
{
- unsigned char tmp, *msgptr, phase;
+ unsigned char *msgptr, phase, tmp;
int len;
int rc;
#if defined(REAL_DMA)
/*
* Function : int NCR5380_transfer_dma (struct Scsi_Host *instance,
- * unsigned char *phase, int *count, unsigned char **data)
+ * unsigned char *phase, int *count, unsigned char **data)
*
* Purpose : transfers data in given phase using either real
- * or pseudo DMA.
+ * or pseudo DMA.
*
* Inputs : instance - instance of driver, *phase - pointer to
- * what phase is expected, *count - pointer to number of
- * bytes to transfer, **data - pointer to data pointer.
+ * what phase is expected, *count - pointer to number of
+ * bytes to transfer, **data - pointer to data pointer.
*
* Returns : -1 when different phase is entered without transferring
- * maximum number of bytes, 0 if all bytes or transferred or exit
- * is in same phase.
- *
- * Also, *phase, *count, *data are modified in place.
+ * maximum number of bytes, 0 if all bytes or transferred or exit
+ * is in same phase.
*
+ * Also, *phase, *count, *data are modified in place.
*/
unsigned char *phase, int *count,
unsigned char **data)
{
- SETUP_HOSTDATA(instance);
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
register int c = *count;
register unsigned char p = *phase;
}
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);
+ dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n",
+ (p & SR_IO) ? "receive" : "send", c, *data);
/* netbsd turns off ints here, why not be safe and do it too */
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",
- c, (p & SR_IO) ? "to" : "from", d);
+ dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n",
+ (p & SR_IO) ? "receive" : "send", c, d);
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
* Function : NCR5380_information_transfer (struct Scsi_Host *instance)
*
* Purpose : run through the various SCSI phases and do as the target
- * directs us to. Operates on the currently connected command,
- * instance->connected.
+ * directs us to. Operates on the currently connected command,
+ * instance->connected.
*
* Inputs : instance, instance for which we are doing commands
*
* Side effects : SCSI things happen, the disconnected queue will be
- * modified if a command disconnects, *instance->connected will
- * change.
+ * modified if a command disconnects, *instance->connected will
+ * change.
*
* XXX Note : we need to watch for bus free or a reset condition here
- * to recover from an unexpected bus free condition.
+ * to recover from an unexpected bus free condition.
*/
static void NCR5380_information_transfer(struct Scsi_Host *instance)
{
- SETUP_HOSTDATA(instance);
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char msgout = NOP;
int sink = 0;
int len;
#endif
while ((cmd = hostdata->connected)) {
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
+
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
/* 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,
+ sun3scsi_dma_setup(instance, d, count,
rq_data_dir(cmd->request));
sun3_dma_setup_done = cmd;
}
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN |
- ICR_ASSERT_ACK);
+ ICR_ASSERT_ACK);
while (NCR5380_read(STATUS_REG) & SR_REQ)
;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
- ICR_ASSERT_ATN);
+ ICR_ASSERT_ATN);
sink = 0;
continue;
}
switch (phase) {
case PHASE_DATAOUT:
#if (NDEBUG & NDEBUG_NO_DATAOUT)
- printk("scsi%d: NDEBUG_NO_DATAOUT set, attempted DATAOUT "
- "aborted\n", HOSTNO);
+ shost_printk(KERN_DEBUG, instance, "NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n");
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
- cmd->scsi_done(cmd);
+ complete_cmd(instance, cmd);
return;
#endif
case PHASE_DATAIN:
--cmd->SCp.buffers_residual;
cmd->SCp.this_residual = cmd->SCp.buffer->length;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
- /* ++roman: Try to merge some scatter-buffers if
- * they are at contiguous physical addresses.
- */
merge_contiguous_buffers(cmd);
- dprintk(NDEBUG_INFORMATION, "scsi%d: %d bytes and %d buffers left\n",
- HOSTNO, cmd->SCp.this_residual,
- cmd->SCp.buffers_residual);
+ dsprintk(NDEBUG_INFORMATION, instance, "%d bytes and %d buffers left\n",
+ cmd->SCp.this_residual,
+ cmd->SCp.buffers_residual);
}
/*
*/
/* ++roman: I suggest, this should be
- * #if def(REAL_DMA)
+ * #if def(REAL_DMA)
* instead of leaving REAL_DMA out.
*/
/*
* If the watchdog timer fires, all future
* accesses to this device will use the
- * polled-IO. */
+ * polled-IO.
+ */
scmd_printk(KERN_INFO, cmd,
"switching to slow handshake\n");
cmd->device->borken = 1;
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
- cmd->scsi_done(cmd);
+ complete_cmd(instance, cmd);
/* XXX - need to source or sink data here, as appropriate */
} else {
#ifdef REAL_DMA
{
spin_unlock_irq(&hostdata->lock);
NCR5380_transfer_pio(instance, &phase,
- (int *)&cmd->SCp.this_residual,
- (unsigned char **)&cmd->SCp.ptr);
+ (int *)&cmd->SCp.this_residual,
+ (unsigned char **)&cmd->SCp.ptr);
spin_lock_irq(&hostdata->lock);
}
#if defined(CONFIG_SUN3) && defined(REAL_DMA)
case COMMAND_COMPLETE:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d, lun %llu "
- "completed\n", HOSTNO, cmd->device->id, cmd->device->lun);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "COMMAND COMPLETE %p target %d lun %llu\n",
+ cmd, scmd_id(cmd), cmd->device->lun);
hostdata->connected = NULL;
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
if (status_byte(cmd->SCp.Status) == QUEUE_FULL) {
- 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,
- ta->nr_allocated);
+ u8 lun = cmd->device->lun;
+ struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun];
+
+ dsprintk(NDEBUG_TAGS, instance,
+ "QUEUE_FULL %p target %d lun %d nr_allocated %d\n",
+ cmd, scmd_id(cmd), lun, ta->nr_allocated);
if (ta->queue_size > ta->nr_allocated)
ta->queue_size = ta->nr_allocated;
}
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
- /*
- * I'm not sure what the correct thing to do here is :
- *
- * If the command that just executed is NOT a request
- * sense, the obvious thing to do is to set the result
- * code to the values of the stored parameters.
- *
- * If it was a REQUEST SENSE command, we need some way to
- * differentiate between the failure code of the original
- * and the failure code of the REQUEST sense - the obvious
- * case is success, where we fall through and leave the
- * result code unchanged.
- *
- * The non-obvious place is where the REQUEST SENSE failed
- */
-
- if (cmd->cmnd[0] != REQUEST_SENSE)
- cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
- else if (status_byte(cmd->SCp.Status) != GOOD)
- cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
-
- if ((cmd->cmnd[0] == REQUEST_SENSE) &&
- hostdata->ses.cmd_len) {
- scsi_eh_restore_cmnd(cmd, &hostdata->ses);
- hostdata->ses.cmd_len = 0 ;
- }
-
- if ((cmd->cmnd[0] != REQUEST_SENSE) &&
- (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
- scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
-
- dprintk(NDEBUG_AUTOSENSE, "scsi%d: performing request sense\n", HOSTNO);
-
- LIST(cmd,hostdata->issue_queue);
- SET_NEXT(cmd, hostdata->issue_queue);
- hostdata->issue_queue = (struct scsi_cmnd *) cmd;
- dsprintk(NDEBUG_QUEUES, instance,
- "REQUEST SENSE cmd %p added to head of issue queue\n",
- cmd);
- } else {
- cmd->scsi_done(cmd);
+ cmd->result &= ~0xffff;
+ cmd->result |= cmd->SCp.Status;
+ cmd->result |= cmd->SCp.Message << 8;
+
+ if (cmd->cmnd[0] == REQUEST_SENSE)
+ complete_cmd(instance, cmd);
+ else {
+ if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION ||
+ cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) {
+ dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n",
+ cmd);
+ list_add_tail(&ncmd->list,
+ &hostdata->autosense);
+ } else
+ complete_cmd(instance, cmd);
}
/*
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- /* ++roman: For Falcon SCSI, release the lock on the
- * ST-DMA here if no other commands are waiting on the
- * disconnected queue.
- */
maybe_release_dma_irq(instance);
return;
case MESSAGE_REJECT:
cmd->device->tagged_supported = 0;
hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
cmd->tag = TAG_NONE;
- dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu rejected "
- "QUEUE_TAG message; tagged queuing "
- "disabled\n",
- HOSTNO, cmd->device->id, cmd->device->lun);
+ dsprintk(NDEBUG_TAGS, instance, "target %d lun %llu rejected QUEUE_TAG message; tagged queuing disabled\n",
+ scmd_id(cmd), cmd->device->lun);
break;
}
break;
case DISCONNECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- LIST(cmd,hostdata->disconnected_queue);
- SET_NEXT(cmd, hostdata->disconnected_queue);
hostdata->connected = NULL;
- hostdata->disconnected_queue = cmd;
- dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d lun %llu was "
- "moved from connected to the "
- "disconnected_queue\n", HOSTNO,
- cmd->device->id, cmd->device->lun);
+ list_add(&ncmd->list, &hostdata->disconnected);
+ dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
+ instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
+ cmd, scmd_id(cmd), cmd->device->lun);
+
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
break;
case EXTENDED_MESSAGE:
/*
- * Extended messages are sent in the following format :
- * Byte
- * 0 EXTENDED_MESSAGE == 1
- * 1 length (includes one byte for code, doesn't
- * include first two bytes)
- * 2 code
- * 3..length+1 arguments
- *
- * Start the extended message buffer with the EXTENDED_MESSAGE
+ * Start the message buffer with the EXTENDED_MESSAGE
* byte, since spi_print_msg() wants the whole thing.
*/
extended_msg[0] = EXTENDED_MESSAGE;
spin_unlock_irq(&hostdata->lock);
- dprintk(NDEBUG_EXTENDED, "scsi%d: receiving extended message\n", HOSTNO);
+ dsprintk(NDEBUG_EXTENDED, instance, "receiving extended message\n");
len = 2;
data = extended_msg + 1;
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
- dprintk(NDEBUG_EXTENDED, "scsi%d: length=%d, code=0x%02x\n", HOSTNO,
- (int)extended_msg[1], (int)extended_msg[2]);
+ dsprintk(NDEBUG_EXTENDED, instance, "length %d, code 0x%02x\n",
+ (int)extended_msg[1],
+ (int)extended_msg[2]);
if (!len && extended_msg[1] > 0 &&
extended_msg[1] <= sizeof(extended_msg) - 2) {
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
- dprintk(NDEBUG_EXTENDED, "scsi%d: message received, residual %d\n",
- HOSTNO, len);
+ dsprintk(NDEBUG_EXTENDED, instance, "message received, residual %d\n",
+ len);
switch (extended_msg[2]) {
case EXTENDED_SDTR:
tmp = 0;
}
} else if (len) {
- printk(KERN_NOTICE "scsi%d: error receiving "
- "extended message\n", HOSTNO);
+ shost_printk(KERN_ERR, instance, "error receiving extended message\n");
tmp = 0;
} else {
- printk(KERN_NOTICE "scsi%d: extended message "
- "code %02x length %d is too long\n",
- HOSTNO, extended_msg[2], extended_msg[1]);
+ shost_printk(KERN_NOTICE, instance, "extended message code %02x length %d is too long\n",
+ extended_msg[2], extended_msg[1]);
tmp = 0;
}
*/
default:
if (!tmp) {
- printk(KERN_INFO "scsi%d: rejecting message ",
- instance->host_no);
+ shost_printk(KERN_ERR, instance, "rejecting message ");
spi_print_msg(extended_msg);
printk("\n");
} else if (tmp != EXTENDED_MESSAGE)
hostdata->last_message = msgout;
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (msgout == ABORT) {
-#ifdef SUPPORT_TAGS
- cmd_free_tag(cmd);
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
-#endif
hostdata->connected = NULL;
cmd->result = DID_ERROR << 16;
+ complete_cmd(instance, cmd);
maybe_release_dma_irq(instance);
- cmd->scsi_done(cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
}
cmd->SCp.Status = tmp;
break;
default:
- printk("scsi%d: unknown phase\n", HOSTNO);
+ shost_printk(KERN_ERR, instance, "unknown phase\n");
NCR5380_dprint(NDEBUG_ANY, instance);
} /* switch(phase) */
} else {
* 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
- * nexus has been reestablished,
+ * 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.
- *
*/
static void NCR5380_reselect(struct Scsi_Host *instance)
{
- SETUP_HOSTDATA(instance);
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char target_mask;
unsigned char lun;
#ifdef SUPPORT_TAGS
unsigned char msg[3];
int __maybe_unused len;
unsigned char __maybe_unused *data, __maybe_unused phase;
- struct scsi_cmnd *tmp = NULL, *prev;
+ struct NCR5380_cmd *ncmd;
+ struct scsi_cmnd *tmp;
/*
* Disable arbitration, etc. since the host adapter obviously
target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask);
- dprintk(NDEBUG_RESELECTION, "scsi%d: reselect\n", HOSTNO);
+ dsprintk(NDEBUG_RESELECTION, instance, "reselect\n");
/*
* At this point, we have detected that our SCSI ID is on the bus,
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);
+ dsprintk(NDEBUG_TAGS, instance, "reselect: target mask %02x, lun %d sent tag %d\n",
+ target_mask, lun, tag);
}
#endif
* just reestablished, and remove it from the disconnected queue.
*/
- for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL;
- tmp; prev = tmp, tmp = NEXT(tmp)) {
- if ((target_mask == (1 << tmp->device->id)) && (lun == (u8)tmp->device->lun)
+ tmp = NULL;
+ list_for_each_entry(ncmd, &hostdata->disconnected, list) {
+ struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
+
+ if (target_mask == (1 << scmd_id(cmd)) &&
+ lun == (u8)cmd->device->lun
#ifdef SUPPORT_TAGS
- && (tag == tmp->tag)
+ && (tag == cmd->tag)
#endif
) {
- if (prev) {
- REMOVE(prev, NEXT(prev), tmp, NEXT(tmp));
- SET_NEXT(prev, NEXT(tmp));
- } else {
- REMOVE(-1, hostdata->disconnected_queue, tmp, NEXT(tmp));
- hostdata->disconnected_queue = NEXT(tmp);
- }
- SET_NEXT(tmp, NULL);
+ list_del(&ncmd->list);
+ tmp = cmd;
break;
}
}
- if (!tmp) {
+ if (tmp) {
+ dsprintk(NDEBUG_RESELECTION | NDEBUG_QUEUES, instance,
+ "reselect: removed %p from disconnected queue\n", tmp);
+ } else {
+
#ifdef SUPPORT_TAGS
shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d tag %d not in disconnected queue.\n",
target_mask, lun, tag);
}
/* 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));
+ sun3scsi_dma_setup(instance, d, count,
+ rq_data_dir(tmp->request));
sun3_dma_setup_done = tmp;
}
}
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);
+ dsprintk(NDEBUG_TAGS, instance, "reselect: target mask %02x, lun %d sent tag %d\n"
+ 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);
+ dsprintk(NDEBUG_RESELECTION, instance, "nexus established, target %d, lun %llu, tag %d\n",
+ scmd_id(tmp), tmp->device->lun, tmp->tag);
}
-/*
- * Function : int NCR5380_abort (struct scsi_cmnd *cmd)
- *
- * Purpose : abort a command
- *
- * 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 : 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
- * a problem, we could implement longjmp() / setjmp(), setjmp()
- * called where the loop started in NCR5380_main().
+/**
+ * list_find_cmd - test for presence of a command in a linked list
+ * @haystack: list of commands
+ * @needle: command to search for
*/
-static
-int NCR5380_abort(struct scsi_cmnd *cmd)
+static bool list_find_cmd(struct list_head *haystack,
+ struct scsi_cmnd *needle)
{
- struct Scsi_Host *instance = cmd->device->host;
- SETUP_HOSTDATA(instance);
- struct scsi_cmnd *tmp, **prev;
- unsigned long flags;
+ struct NCR5380_cmd *ncmd;
- scmd_printk(KERN_NOTICE, cmd, "aborting command\n");
+ list_for_each_entry(ncmd, haystack, list)
+ if (NCR5380_to_scmd(ncmd) == needle)
+ return true;
+ return false;
+}
- spin_lock_irqsave(&hostdata->lock, flags);
+/**
+ * list_remove_cmd - remove a command from linked list
+ * @haystack: list of commands
+ * @needle: command to remove
+ */
- NCR5380_dprint(NDEBUG_ANY, instance);
- NCR5380_dprint_phase(NDEBUG_ANY, instance);
+static bool list_del_cmd(struct list_head *haystack,
+ struct scsi_cmnd *needle)
+{
+ if (list_find_cmd(haystack, needle)) {
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(needle);
- 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));
+ list_del(&ncmd->list);
+ return true;
+ }
+ return false;
+}
-#if 1
- /*
- * Case 1 : If the command is the currently executing command,
- * we'll set the aborted flag and return control so that
- * information transfer routine can exit cleanly.
- */
+/**
+ * NCR5380_abort - scsi host eh_abort_handler() method
+ * @cmd: the command to be aborted
+ *
+ * Try to abort a given command by removing it from queues and/or sending
+ * the target an abort message. This may not succeed in causing a target
+ * to abort the command. Nonetheless, the low-level driver must forget about
+ * the command because the mid-layer reclaims it and it may be re-issued.
+ *
+ * The normal path taken by a command is as follows. For EH we trace this
+ * same path to locate and abort the command.
+ *
+ * unissued -> selecting -> [unissued -> selecting ->]... connected ->
+ * [disconnected -> connected ->]...
+ * [autosense -> connected ->] done
+ *
+ * If cmd is unissued then just remove it.
+ * If cmd is disconnected, try to select the target.
+ * If cmd is connected, try to send an abort message.
+ * If cmd is waiting for autosense, give it a chance to complete but check
+ * that it isn't left connected.
+ * If cmd was not found at all then presumably it has already been completed,
+ * in which case return SUCCESS to try to avoid further EH measures.
+ * If the command has not completed yet, we must not fail to find it.
+ */
- if (hostdata->connected == cmd) {
+static int NCR5380_abort(struct scsi_cmnd *cmd)
+{
+ struct Scsi_Host *instance = cmd->device->host;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ unsigned long flags;
+ int result = SUCCESS;
- dprintk(NDEBUG_ABORT, "scsi%d: aborting connected command\n", HOSTNO);
- /*
- * We should perform BSY checking, and make sure we haven't slipped
- * into BUS FREE.
- */
+ spin_lock_irqsave(&hostdata->lock, flags);
- /* NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN); */
- /*
- * Since we can't change phases until we've completed the current
- * handshake, we have to source or sink a byte of data if the current
- * phase is not MSGOUT.
- */
+#if (NDEBUG & NDEBUG_ANY)
+ scmd_printk(KERN_INFO, cmd, __func__);
+#endif
+ NCR5380_dprint(NDEBUG_ANY, instance);
+ NCR5380_dprint_phase(NDEBUG_ANY, instance);
- /*
- * Return control to the executing NCR drive so we can clear the
- * aborted flag and get back into our main loop.
- */
+ if (list_del_cmd(&hostdata->unissued, cmd)) {
+ dsprintk(NDEBUG_ABORT, instance,
+ "abort: removed %p from issue queue\n", cmd);
+ cmd->result = DID_ABORT << 16;
+ cmd->scsi_done(cmd); /* No tag or busy flag to worry about */
+ }
- if (do_abort(instance) == 0) {
- hostdata->connected = NULL;
- cmd->result = DID_ABORT << 16;
-#ifdef SUPPORT_TAGS
- cmd_free_tag(cmd);
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
-#endif
- maybe_release_dma_irq(instance);
- spin_unlock_irqrestore(&hostdata->lock, flags);
- cmd->scsi_done(cmd);
- return SUCCESS;
- } else {
- spin_unlock_irqrestore(&hostdata->lock, flags);
- printk("scsi%d: abort of connected command failed!\n", HOSTNO);
- return FAILED;
+ if (hostdata->selecting == cmd) {
+ dsprintk(NDEBUG_ABORT, instance,
+ "abort: cmd %p == selecting\n", cmd);
+ hostdata->selecting = NULL;
+ cmd->result = DID_ABORT << 16;
+ complete_cmd(instance, cmd);
+ goto out;
+ }
+
+ if (list_del_cmd(&hostdata->disconnected, cmd)) {
+ dsprintk(NDEBUG_ABORT, instance,
+ "abort: removed %p from disconnected list\n", cmd);
+ cmd->result = DID_ERROR << 16;
+ if (!hostdata->connected)
+ NCR5380_select(instance, cmd);
+ if (hostdata->connected != cmd) {
+ complete_cmd(instance, cmd);
+ result = FAILED;
+ goto out;
}
}
+
+ if (hostdata->connected == cmd) {
+ dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd);
+ hostdata->connected = NULL;
+ if (do_abort(instance)) {
+ set_host_byte(cmd, DID_ERROR);
+ complete_cmd(instance, cmd);
+ result = FAILED;
+ goto out;
+ }
+ set_host_byte(cmd, DID_ABORT);
+#ifdef REAL_DMA
+ hostdata->dma_len = 0;
#endif
+ if (cmd->cmnd[0] == REQUEST_SENSE)
+ complete_cmd(instance, cmd);
+ else {
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
- /*
- * Case 2 : If the command hasn't been issued yet, we simply remove it
- * from the 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);
- spin_unlock_irqrestore(&hostdata->lock, 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);
- return SUCCESS;
+ /* Perform autosense for this command */
+ list_add(&ncmd->list, &hostdata->autosense);
}
}
- /*
- * Case 3 : If any commands are connected, we're going to fail the abort
- * and let the high level SCSI driver retry at a later time or
- * issue a reset.
- *
- * Timeouts, and therefore aborted commands, will be highly unlikely
- * and handling them cleanly in this situation would make the common
- * case of noresets less efficient, and would pollute our code. So,
- * we fail.
- */
-
- if (hostdata->connected) {
+ if (list_find_cmd(&hostdata->autosense, cmd)) {
+ dsprintk(NDEBUG_ABORT, instance,
+ "abort: found %p on sense queue\n", cmd);
spin_unlock_irqrestore(&hostdata->lock, flags);
- dprintk(NDEBUG_ABORT, "scsi%d: abort failed, command connected.\n", HOSTNO);
- return FAILED;
+ queue_work(hostdata->work_q, &hostdata->main_task);
+ msleep(1000);
+ spin_lock_irqsave(&hostdata->lock, flags);
+ if (list_del_cmd(&hostdata->autosense, cmd)) {
+ dsprintk(NDEBUG_ABORT, instance,
+ "abort: removed %p from sense queue\n", cmd);
+ set_host_byte(cmd, DID_ABORT);
+ complete_cmd(instance, cmd);
+ goto out;
+ }
}
- /*
- * Case 4: If the command is currently disconnected from the bus, and
- * there are no connected commands, we reconnect the I_T_L or
- * I_T_L_Q nexus associated with it, go into message out, and send
- * an abort message.
- *
- * This case is especially ugly. In order to reestablish the nexus, we
- * need to call NCR5380_select(). The easiest way to implement this
- * function was to abort if the bus was busy, and let the interrupt
- * handler triggered on the SEL for reselect take care of lost arbitrations
- * where necessary, meaning interrupts need to be enabled.
- *
- * When interrupts are enabled, the queues may change - so we
- * can't remove it from the disconnected queue before selecting it
- * because that could cause a failure in hashing the nexus if that
- * device reselected.
- *
- * Since the queues may change, we can't use the pointers from when we
- * first locate it.
- *
- * So, we must first locate the command, and if NCR5380_select()
- * succeeds, then issue the abort, relocate the command and remove
- * it from the disconnected queue.
- */
-
- for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp;
- tmp = NEXT(tmp)) {
- if (cmd == tmp) {
- dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO);
-
- if (NCR5380_select(instance, cmd)) {
- spin_unlock_irq(&hostdata->lock);
- return FAILED;
- }
- dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO);
-
- do_abort(instance);
-
- 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));
- *prev = NEXT(tmp);
- SET_NEXT(tmp, NULL);
- tmp->result = DID_ABORT << 16;
- /* We must unlock the tag/LUN immediately here, since the
- * target goes to BUS FREE and doesn't send us another
- * message (COMMAND_COMPLETE or the like)
- */
-#ifdef SUPPORT_TAGS
- cmd_free_tag(tmp);
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
-#endif
- maybe_release_dma_irq(instance);
- spin_unlock_irqrestore(&hostdata->lock, flags);
- tmp->scsi_done(tmp);
- return SUCCESS;
- }
- }
+ if (hostdata->connected == cmd) {
+ dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd);
+ hostdata->connected = NULL;
+ if (do_abort(instance)) {
+ set_host_byte(cmd, DID_ERROR);
+ complete_cmd(instance, cmd);
+ result = FAILED;
+ goto out;
}
+ set_host_byte(cmd, DID_ABORT);
+#ifdef REAL_DMA
+ hostdata->dma_len = 0;
+#endif
+ complete_cmd(instance, cmd);
}
- /* 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.
- */
+out:
+ if (result == FAILED)
+ dsprintk(NDEBUG_ABORT, instance, "abort: failed to abort %p\n", cmd);
+ else
+ dsprintk(NDEBUG_ABORT, instance, "abort: successfully aborted %p\n", cmd);
+
+ queue_work(hostdata->work_q, &hostdata->main_task);
maybe_release_dma_irq(instance);
spin_unlock_irqrestore(&hostdata->lock, flags);
- /*
- * Case 5 : If we reached this point, the command was not found in any of
- * the queues.
- *
- * We probably reached this point because of an unlikely race condition
- * between the command completing successfully and the abortion code,
- * so we won't panic, but we will notify the user in case something really
- * broke.
- */
-
- printk(KERN_INFO "scsi%d: warning : SCSI command probably completed successfully before abortion\n", HOSTNO);
-
- return FAILED;
+ return result;
}
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int i;
unsigned long flags;
+ struct NCR5380_cmd *ncmd;
spin_lock_irqsave(&hostdata->lock, flags);
#if (NDEBUG & NDEBUG_ANY)
- scmd_printk(KERN_INFO, cmd, "performing bus reset\n");
+ scmd_printk(KERN_INFO, cmd, __func__);
#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
* commands!
*/
- if (hostdata->issue_queue)
- dsprintk(NDEBUG_ABORT, instance, "reset aborted issued command(s)\n");
- if (hostdata->connected)
- dsprintk(NDEBUG_ABORT, instance, "reset aborted a connected command\n");
- if (hostdata->disconnected_queue)
- dsprintk(NDEBUG_ABORT, instance, "reset aborted disconnected command(s)\n");
+ hostdata->selecting = NULL;
+
+ list_for_each_entry(ncmd, &hostdata->disconnected, list) {
+ struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
+
+ set_host_byte(cmd, DID_RESET);
+ cmd->scsi_done(cmd);
+ }
+
+ list_for_each_entry(ncmd, &hostdata->autosense, list) {
+ struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
+
+ set_host_byte(cmd, DID_RESET);
+ cmd->scsi_done(cmd);
+ }
+
+ if (hostdata->connected) {
+ set_host_byte(hostdata->connected, DID_RESET);
+ complete_cmd(instance, hostdata->connected);
+ hostdata->connected = NULL;
+ }
+
+ if (hostdata->sensing) {
+ set_host_byte(hostdata->connected, DID_RESET);
+ complete_cmd(instance, hostdata->sensing);
+ hostdata->sensing = NULL;
+ }
- hostdata->issue_queue = NULL;
- hostdata->connected = NULL;
- hostdata->disconnected_queue = NULL;
#ifdef SUPPORT_TAGS
free_all_tags(hostdata);
#endif
hostdata->dma_len = 0;
#endif
+ queue_work(hostdata->work_q, &hostdata->main_task);
maybe_release_dma_irq(instance);
spin_unlock_irqrestore(&hostdata->lock, flags);
projects / cascardo / linux.git / blobdiff