Hi James,
this patch removes the need for a slave_destroy callback in aic79xx.
We've been troubles again even with the latest scanning fixes so I
decided it has to go. Especially as it's not really required anyway.
Please apply.
Cheers,
Hannes
--
Dr. Hannes Reinecke hare@xxxxxxx
SuSE Linux Products GmbH S390 & zSeries
Maxfeldstraße 5 +49 911 74053 688
90409 Nürnberg http://www.suse.de
aic79xx: Remove slave_destroy
Even with the latest fixes aic79xx still occasionally triggers the
BUG_ON in slave_destroy. Rather than trying to figure out the various
levels of interaction here I've decided to remove the callback altogether.
The primary reason for the slave_alloc / slave_destroy is to keep an
index of pointers to the sdevs associated with a given target.
However, by changing the arguments to the affected functions slightly
it's possible to avoid the use of that index entirely.
The only performance penalty we'll incur is in writing the
information for /proc/scsi/XXX, as we'll have to recurse over all
available sdevs to find the correct ones. But I doubt that reading
from /proc is in any way time-critical.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
diff --git a/drivers/scsi/aic7xxx/aic79xx.h b/drivers/scsi/aic7xxx/aic79xx.h
index eb77456..df3346b 100644
--- a/drivers/scsi/aic7xxx/aic79xx.h
+++ b/drivers/scsi/aic7xxx/aic79xx.h
@@ -1487,6 +1487,7 @@ typedef enum {
} ahd_queue_alg;
void ahd_set_tags(struct ahd_softc *ahd,
+ struct scsi_cmnd *cmd,
struct ahd_devinfo *devinfo,
ahd_queue_alg alg);
diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c
index 801fc81..a1e8ca7 100644
--- a/drivers/scsi/aic7xxx/aic79xx_core.c
+++ b/drivers/scsi/aic7xxx/aic79xx_core.c
@@ -1090,7 +1090,7 @@ #endif
/* Notify XPT */
ahd_send_async(ahd, devinfo.channel, devinfo.target,
- CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
+ CAM_LUN_WILDCARD, AC_SENT_BDR);
/*
* Allow the sequencer to continue with
@@ -3062,7 +3062,7 @@ ahd_set_syncrate(struct ahd_softc *ahd,
tinfo->curr.ppr_options = ppr_options;
ahd_send_async(ahd, devinfo->channel, devinfo->target,
- CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
+ CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
if (bootverbose) {
if (offset != 0) {
int options;
@@ -3184,7 +3184,7 @@ ahd_set_width(struct ahd_softc *ahd, str
tinfo->curr.width = width;
ahd_send_async(ahd, devinfo->channel, devinfo->target,
- CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
+ CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
if (bootverbose) {
printf("%s: target %d using %dbit transfers\n",
ahd_name(ahd), devinfo->target,
@@ -3211,12 +3211,14 @@ ahd_set_width(struct ahd_softc *ahd, str
* Update the current state of tagged queuing for a given target.
*/
void
-ahd_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
- ahd_queue_alg alg)
+ahd_set_tags(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+ struct ahd_devinfo *devinfo, ahd_queue_alg alg)
{
- ahd_platform_set_tags(ahd, devinfo, alg);
+ struct scsi_device *sdev = cmd->device;
+
+ ahd_platform_set_tags(ahd, sdev, devinfo, alg);
ahd_send_async(ahd, devinfo->channel, devinfo->target,
- devinfo->lun, AC_TRANSFER_NEG, &alg);
+ devinfo->lun, AC_TRANSFER_NEG);
}
static void
@@ -4746,7 +4748,7 @@ ahd_handle_msg_reject(struct ahd_softc *
printf("(%s:%c:%d:%d): refuses tagged commands. "
"Performing non-tagged I/O\n", ahd_name(ahd),
devinfo->channel, devinfo->target, devinfo->lun);
- ahd_set_tags(ahd, devinfo, AHD_QUEUE_NONE);
+ ahd_set_tags(ahd, scb->io_ctx, devinfo, AHD_QUEUE_NONE);
mask = ~0x23;
} else {
printf("(%s:%c:%d:%d): refuses %s tagged commands. "
@@ -4754,7 +4756,7 @@ ahd_handle_msg_reject(struct ahd_softc *
ahd_name(ahd), devinfo->channel, devinfo->target,
devinfo->lun, tag_type == MSG_ORDERED_TASK
? "ordered" : "head of queue");
- ahd_set_tags(ahd, devinfo, AHD_QUEUE_BASIC);
+ ahd_set_tags(ahd, scb->io_ctx, devinfo, AHD_QUEUE_BASIC);
mask = ~0x03;
}
@@ -5098,7 +5100,7 @@ #endif
if (status != CAM_SEL_TIMEOUT)
ahd_send_async(ahd, devinfo->channel, devinfo->target,
- CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
+ CAM_LUN_WILDCARD, AC_SENT_BDR);
if (message != NULL && bootverbose)
printf("%s: %s on %c:%d. %d SCBs aborted\n", ahd_name(ahd),
@@ -7952,7 +7954,7 @@ #ifdef AHD_TARGET_MODE
#endif
/* Notify the XPT that a bus reset occurred */
ahd_send_async(ahd, devinfo.channel, CAM_TARGET_WILDCARD,
- CAM_LUN_WILDCARD, AC_BUS_RESET, NULL);
+ CAM_LUN_WILDCARD, AC_BUS_RESET);
/*
* Revert to async/narrow transfers until we renegotiate.
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index e0ccdf3..8bba043 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -484,7 +484,6 @@ ahd_linux_target_alloc(struct scsi_targe
struct seeprom_config *sc = ahd->seep_config;
unsigned long flags;
struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
- struct ahd_linux_target *targ = scsi_transport_target_data(starget);
struct ahd_devinfo devinfo;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
@@ -495,7 +494,6 @@ ahd_linux_target_alloc(struct scsi_targe
BUG_ON(*ahd_targp != NULL);
*ahd_targp = starget;
- memset(targ, 0, sizeof(*targ));
if (sc) {
int flags = sc->device_flags[starget->id];
@@ -551,15 +549,11 @@ ahd_linux_slave_alloc(struct scsi_device
{
struct ahd_softc *ahd =
*((struct ahd_softc **)sdev->host->hostdata);
- struct scsi_target *starget = sdev->sdev_target;
- struct ahd_linux_target *targ = scsi_transport_target_data(starget);
struct ahd_linux_device *dev;
if (bootverbose)
printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
- BUG_ON(targ->sdev[sdev->lun] != NULL);
-
dev = scsi_transport_device_data(sdev);
memset(dev, 0, sizeof(*dev));
@@ -576,8 +570,6 @@ ahd_linux_slave_alloc(struct scsi_device
*/
dev->maxtags = 0;
- targ->sdev[sdev->lun] = sdev;
-
return (0);
}
@@ -599,23 +591,6 @@ ahd_linux_slave_configure(struct scsi_de
return 0;
}
-static void
-ahd_linux_slave_destroy(struct scsi_device *sdev)
-{
- struct ahd_softc *ahd;
- struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
- struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
-
- ahd = *((struct ahd_softc **)sdev->host->hostdata);
- if (bootverbose)
- printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
-
- BUG_ON(dev->active);
-
- targ->sdev[sdev->lun] = NULL;
-
-}
-
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
@@ -822,7 +797,6 @@ #endif
.use_clustering = ENABLE_CLUSTERING,
.slave_alloc = ahd_linux_slave_alloc,
.slave_configure = ahd_linux_slave_configure,
- .slave_destroy = ahd_linux_slave_destroy,
.target_alloc = ahd_linux_target_alloc,
.target_destroy = ahd_linux_target_destroy,
};
@@ -1249,20 +1223,13 @@ void
ahd_platform_free(struct ahd_softc *ahd)
{
struct scsi_target *starget;
- int i, j;
+ int i;
if (ahd->platform_data != NULL) {
/* destroy all of the device and target objects */
for (i = 0; i < AHD_NUM_TARGETS; i++) {
starget = ahd->platform_data->starget[i];
if (starget != NULL) {
- for (j = 0; j < AHD_NUM_LUNS; j++) {
- struct ahd_linux_target *targ =
- scsi_transport_target_data(starget);
- if (targ->sdev[j] == NULL)
- continue;
- targ->sdev[j] = NULL;
- }
ahd->platform_data->starget[i] = NULL;
}
}
@@ -1318,20 +1285,13 @@ ahd_platform_freeze_devq(struct ahd_soft
}
void
-ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
- ahd_queue_alg alg)
+ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
+ struct ahd_devinfo *devinfo, ahd_queue_alg alg)
{
- struct scsi_target *starget;
- struct ahd_linux_target *targ;
struct ahd_linux_device *dev;
- struct scsi_device *sdev;
int was_queuing;
int now_queuing;
- starget = ahd->platform_data->starget[devinfo->target];
- targ = scsi_transport_target_data(starget);
- BUG_ON(targ == NULL);
- sdev = targ->sdev[devinfo->lun];
if (sdev == NULL)
return;
@@ -1467,11 +1427,15 @@ ahd_linux_device_queue_depth(struct scsi
tags = ahd_linux_user_tagdepth(ahd, &devinfo);
if (tags != 0 && sdev->tagged_supported != 0) {
- ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
+ ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
+ ahd_send_async(ahd, devinfo.channel, devinfo.target,
+ devinfo.lun, AC_TRANSFER_NEG);
ahd_print_devinfo(ahd, &devinfo);
printf("Tagged Queuing enabled. Depth %d\n", tags);
} else {
- ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
+ ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
+ ahd_send_async(ahd, devinfo.channel, devinfo.target,
+ devinfo.lun, AC_TRANSFER_NEG);
}
}
@@ -1629,7 +1593,7 @@ ahd_linux_isr(int irq, void *dev_id, str
void
ahd_send_async(struct ahd_softc *ahd, char channel,
- u_int target, u_int lun, ac_code code, void *arg)
+ u_int target, u_int lun, ac_code code)
{
switch (code) {
case AC_TRANSFER_NEG:
@@ -1956,7 +1920,7 @@ #endif
}
ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
ahd_set_scsi_status(scb, SCSI_STATUS_OK);
- ahd_platform_set_tags(ahd, &devinfo,
+ ahd_platform_set_tags(ahd, sdev, &devinfo,
(dev->flags & AHD_DEV_Q_BASIC)
? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
break;
@@ -1966,7 +1930,7 @@ #endif
* as if the target returned BUSY SCSI status.
*/
dev->openings = 1;
- ahd_platform_set_tags(ahd, &devinfo,
+ ahd_platform_set_tags(ahd, sdev, &devinfo,
(dev->flags & AHD_DEV_Q_BASIC)
? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
@@ -2778,8 +2742,6 @@ ahd_linux_init(void)
if (!ahd_linux_transport_template)
return -ENODEV;
- scsi_transport_reserve_target(ahd_linux_transport_template,
- sizeof(struct ahd_linux_target));
scsi_transport_reserve_device(ahd_linux_transport_template,
sizeof(struct ahd_linux_device));
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.h b/drivers/scsi/aic7xxx/aic79xx_osm.h
index 2b83316..b2e65e1 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.h
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.h
@@ -263,7 +263,6 @@ typedef enum {
AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
} ahd_linux_dev_flags;
-struct ahd_linux_target;
struct ahd_linux_device {
TAILQ_ENTRY(ahd_linux_device) links;
@@ -343,12 +342,6 @@ #define AHD_LOCK_TAGS_COUNT 50
#define AHD_OTAG_THRESH 500
};
-struct ahd_linux_target {
- struct scsi_device *sdev[AHD_NUM_LUNS];
- struct ahd_transinfo last_tinfo;
- struct ahd_softc *ahd;
-};
-
/********************* Definitions Required by the Core ***********************/
/*
* Number of SG segments we require. So long as the S/G segments for
@@ -865,7 +858,7 @@ ahd_freeze_scb(struct scb *scb)
}
}
-void ahd_platform_set_tags(struct ahd_softc *ahd,
+void ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
struct ahd_devinfo *devinfo, ahd_queue_alg);
int ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
char channel, int lun, u_int tag,
@@ -874,7 +867,7 @@ irqreturn_t
ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
void ahd_done(struct ahd_softc*, struct scb*);
void ahd_send_async(struct ahd_softc *, char channel,
- u_int target, u_int lun, ac_code, void *);
+ u_int target, u_int lun, ac_code);
void ahd_print_path(struct ahd_softc *, struct scb *);
#ifdef CONFIG_PCI
diff --git a/drivers/scsi/aic7xxx/aic79xx_proc.c b/drivers/scsi/aic7xxx/aic79xx_proc.c
index 24fd59a..c5f0ee5 100644
--- a/drivers/scsi/aic7xxx/aic79xx_proc.c
+++ b/drivers/scsi/aic7xxx/aic79xx_proc.c
@@ -47,7 +47,7 @@ static int copy_info(struct info_str *in
static void ahd_dump_target_state(struct ahd_softc *ahd,
struct info_str *info,
u_int our_id, char channel,
- u_int target_id, u_int target_offset);
+ u_int target_id);
static void ahd_dump_device_state(struct info_str *info,
struct scsi_device *sdev);
static int ahd_proc_write_seeprom(struct ahd_softc *ahd,
@@ -204,10 +204,8 @@ ahd_format_transinfo(struct info_str *in
static void
ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
- u_int our_id, char channel, u_int target_id,
- u_int target_offset)
+ u_int our_id, char channel, u_int target_id)
{
- struct ahd_linux_target *targ;
struct scsi_target *starget;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
@@ -218,10 +216,9 @@ ahd_dump_target_state(struct ahd_softc *
copy_info(info, "Target %d Negotiation Settings\n", target_id);
copy_info(info, "\tUser: ");
ahd_format_transinfo(info, &tinfo->user);
- starget = ahd->platform_data->starget[target_offset];
+ starget = ahd->platform_data->starget[target_id];
if (starget == NULL)
return;
- targ = scsi_transport_target_data(starget);
copy_info(info, "\tGoal: ");
ahd_format_transinfo(info, &tinfo->goal);
@@ -231,7 +228,7 @@ ahd_dump_target_state(struct ahd_softc *
for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
struct scsi_device *dev;
- dev = targ->sdev[lun];
+ dev = scsi_device_lookup_by_target(starget, lun);
if (dev == NULL)
continue;
@@ -355,7 +352,7 @@ ahd_linux_proc_info(struct Scsi_Host *sh
copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
ahd->scb_data.numscbs, AHD_NSEG);
- max_targ = 15;
+ max_targ = 16;
if (ahd->seep_config == NULL)
copy_info(&info, "No Serial EEPROM\n");
@@ -373,12 +370,12 @@ ahd_linux_proc_info(struct Scsi_Host *sh
copy_info(&info, "\n");
if ((ahd->features & AHD_WIDE) == 0)
- max_targ = 7;
+ max_targ = 8;
- for (i = 0; i <= max_targ; i++) {
+ for (i = 0; i < max_targ; i++) {
ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
- /*target_id*/i, /*target_offset*/i);
+ /*target_id*/i);
}
retval = info.pos > info.offset ? info.pos - info.offset : 0;
done:
