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[SCSI] aic7xxx: remove the completeq

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This should finish the spurious queue removal from aic7xxx (there are
other queues that are probably unnecessary, but at least the major and
obviously unnecessary ones are done with).

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley 2005-05-17 00:06:08 -05:00 committed by James Bottomley
parent 38c29ce06d
commit 8e45ebcc66
2 changed files with 5 additions and 133 deletions
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121
drivers/scsi/aic7xxx/aic7xxx_osm.c
View File

@ -433,7 +433,6 @@ static void ahc_linux_release_simq(u_long arg);
static void ahc_linux_dev_timed_unfreeze(u_long arg);
static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
struct ahc_devinfo *devinfo);
static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
@ -454,29 +453,17 @@ static void ahc_linux_setup_tag_info_global(char *p);
static aic_option_callback_t ahc_linux_setup_tag_info;
static int aic7xxx_setup(char *s);
static int ahc_linux_next_unit(void);
static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
/********************************* Inlines ************************************/
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
u_int target, u_int lun, int alloc);
static __inline void ahc_schedule_completeq(struct ahc_softc *ahc);
static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
struct ahc_dma_seg *sg,
dma_addr_t addr, bus_size_t len);
static __inline void
ahc_schedule_completeq(struct ahc_softc *ahc)
{
if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
ahc->platform_data->completeq_timer.expires = jiffies;
add_timer(&ahc->platform_data->completeq_timer);
}
}
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
u_int lun, int alloc)
@ -503,42 +490,6 @@ ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
return (dev);
}
#define AHC_LINUX_MAX_RETURNED_ERRORS 4
static struct ahc_cmd *
ahc_linux_run_complete_queue(struct ahc_softc *ahc)
{
struct ahc_cmd *acmd;
int with_errors;
with_errors = 0;
while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
struct scsi_cmnd *cmd;
if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) {
/*
* Linux uses stack recursion to requeue
* commands that need to be retried. Avoid
* blowing out the stack by "spoon feeding"
* commands that completed with error back
* the operating system in case they are going
* to be retried. "ick"
*/
ahc_schedule_completeq(ahc);
break;
}
TAILQ_REMOVE(&ahc->platform_data->completeq,
acmd, acmd_links.tqe);
cmd = &acmd_scsi_cmd(acmd);
cmd->host_scribble = NULL;
if (ahc_cmd_get_transaction_status(cmd) != DID_OK
|| (cmd->result & 0xFF) != SCSI_STATUS_OK)
with_errors++;
cmd->scsi_done(cmd);
}
return (acmd);
}
static __inline void
ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
{
@ -856,7 +807,6 @@ ahc_linux_bus_reset(struct scsi_cmnd *cmd)
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
/*initiate reset*/TRUE);
ahc_linux_run_complete_queue(ahc);
if (bootverbose)
printf("%s: SCSI bus reset delivered. "
@ -1331,13 +1281,8 @@ ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
if (ahc->platform_data == NULL)
return (ENOMEM);
memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
TAILQ_INIT(&ahc->platform_data->completeq);
ahc->platform_data->irq = AHC_LINUX_NOIRQ;
ahc_lockinit(ahc);
init_timer(&ahc->platform_data->completeq_timer);
ahc->platform_data->completeq_timer.data = (u_long)ahc;
ahc->platform_data->completeq_timer.function =
(ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
@ -1355,7 +1300,6 @@ ahc_platform_free(struct ahc_softc *ahc)
int i, j;
if (ahc->platform_data != NULL) {
del_timer_sync(&ahc->platform_data->completeq_timer);
if (ahc->platform_data->host != NULL) {
scsi_remove_host(ahc->platform_data->host);
scsi_host_put(ahc->platform_data->host);
@ -1504,18 +1448,6 @@ ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
return 0;
}
static void
ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
{
u_long flags;
ahc_lock(ahc, &flags);
del_timer(&ahc->platform_data->completeq_timer);
ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
ahc_linux_run_complete_queue(ahc);
ahc_unlock(ahc, &flags);
}
static u_int
ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
{
@ -1785,7 +1717,6 @@ ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
ahc = (struct ahc_softc *) dev_id;
ahc_lock(ahc, &flags);
ours = ahc_intr(ahc);
ahc_linux_run_complete_queue(ahc);
ahc_unlock(ahc, &flags);
return IRQ_RETVAL(ours);
}
@ -1794,8 +1725,6 @@ void
ahc_platform_flushwork(struct ahc_softc *ahc)
{
while (ahc_linux_run_complete_queue(ahc) != NULL)
;
}
static struct ahc_linux_target*
@ -2274,22 +2203,6 @@ ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
static void
ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
{
/*
* Typically, the complete queue has very few entries
* queued to it before the queue is emptied by
* ahc_linux_run_complete_queue, so sorting the entries
* by generation number should be inexpensive.
* We perform the sort so that commands that complete
* with an error are retuned in the order origionally
* queued to the controller so that any subsequent retries
* are performed in order. The underlying ahc routines do
* not guarantee the order that aborted commands will be
* returned to us.
*/
struct ahc_completeq *completeq;
struct ahc_cmd *list_cmd;
struct ahc_cmd *acmd;
/*
* Map CAM error codes into Linux Error codes. We
* avoid the conversion so that the DV code has the
@ -2343,26 +2256,7 @@ ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
new_status = DID_ERROR;
break;
case CAM_REQUEUE_REQ:
/*
* If we want the request requeued, make sure there
* are sufficent retries. In the old scsi error code,
* we used to be able to specify a result code that
* bypassed the retry count. Now we must use this
* hack. We also "fake" a check condition with
* a sense code of ABORTED COMMAND. This seems to
* evoke a retry even if this command is being sent
* via the eh thread. Ick! Ick! Ick!
*/
if (cmd->retries > 0)
cmd->retries--;
new_status = DID_OK;
ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
cmd->result |= (DRIVER_SENSE << 24);
memset(cmd->sense_buffer, 0,
sizeof(cmd->sense_buffer));
cmd->sense_buffer[0] = SSD_ERRCODE_VALID
| SSD_CURRENT_ERROR;
cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
new_status = DID_REQUEUE;
break;
default:
/* We should never get here */
@ -2373,17 +2267,7 @@ ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
ahc_cmd_set_transaction_status(cmd, new_status);
}
completeq = &ahc->platform_data->completeq;
list_cmd = TAILQ_FIRST(completeq);
acmd = (struct ahc_cmd *)cmd;
while (list_cmd != NULL
&& acmd_scsi_cmd(list_cmd).serial_number
< acmd_scsi_cmd(acmd).serial_number)
list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
if (list_cmd != NULL)
TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
else
TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
cmd->scsi_done(cmd);
}
static void
@ -2747,7 +2631,6 @@ done:
}
spin_lock_irq(&ahc->platform_data->spin_lock);
}
ahc_linux_run_complete_queue(ahc);
return (retval);
}

17
drivers/scsi/aic7xxx/aic7xxx_osm.h
View File

@ -436,16 +436,11 @@ struct ahc_linux_target {
/*
* Per-SCB OSM storage.
*/
typedef enum {
AHC_UP_EH_SEMAPHORE = 0x1
} ahc_linux_scb_flags;
struct scb_platform_data {
struct ahc_linux_device *dev;
dma_addr_t buf_busaddr;
uint32_t xfer_len;
uint32_t sense_resid; /* Auto-Sense residual */
ahc_linux_scb_flags flags;
};
/*
@ -454,22 +449,14 @@ struct scb_platform_data {
* alignment restrictions of the various platforms supported by
* this driver.
*/
typedef enum {
AHC_RUN_CMPLT_Q_TIMER = 0x10
} ahc_linux_softc_flags;
TAILQ_HEAD(ahc_completeq, ahc_cmd);
struct ahc_platform_data {
/*
* Fields accessed from interrupt context.
*/
struct ahc_linux_target *targets[AHC_NUM_TARGETS];
struct ahc_completeq completeq;
spinlock_t spin_lock;
u_int qfrozen;
struct timer_list completeq_timer;
struct timer_list reset_timer;
struct semaphore eh_sem;
struct Scsi_Host *host; /* pointer to scsi host */
@ -477,7 +464,9 @@ struct ahc_platform_data {
uint32_t irq; /* IRQ for this adapter */
uint32_t bios_address;
uint32_t mem_busaddr; /* Mem Base Addr */
ahc_linux_softc_flags flags;
#define AHC_UP_EH_SEMAPHORE 0x1
uint32_t flags;
};
/************************** OS Utility Wrappers *******************************/