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[SCSI] aic79xx: Update error recovery 

This patch updates the error recovery. Routines for TARGET RESET
and ABORT COMMAND are split up as the logic is quite dissimilar.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Hannes Reinecke 2006-03-08 12:58:16 +01:00 committed by James Bottomley
parent 1ede5f9fe5
commit 6902f41610
1 changed files with 201 additions and 124 deletions
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325
drivers/scsi/aic7xxx/aic79xx_osm.c
View File

@ -373,7 +373,7 @@ static void ahd_linux_handle_scsi_status(struct ahd_softc *,
struct scb *);
static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
struct scsi_cmnd *cmd);
static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
struct ahd_devinfo *devinfo);
@ -648,10 +648,9 @@ static int
ahd_linux_abort(struct scsi_cmnd *cmd)
{
int error;
error = ahd_linux_queue_abort_cmd(cmd);
error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
if (error != 0)
printf("aic79xx_abort returns 0x%x\n", error);
return error;
}
@ -661,12 +660,97 @@ ahd_linux_abort(struct scsi_cmnd *cmd)
static int
ahd_linux_dev_reset(struct scsi_cmnd *cmd)
{
int error;
struct ahd_softc *ahd;
struct ahd_linux_device *dev;
struct scb *reset_scb;
u_int cdb_byte;
int retval = SUCCESS;
int paused;
int wait;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
unsigned long flags;
DECLARE_COMPLETION(done);
error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
if (error != 0)
printf("aic79xx_dev_reset returns 0x%x\n", error);
return error;
reset_scb = NULL;
paused = FALSE;
wait = FALSE;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
scmd_printk(KERN_INFO, cmd,
"Attempting to queue a TARGET RESET message:");
printf("CDB:");
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
printf(" 0x%x", cmd->cmnd[cdb_byte]);
printf("\n");
/*
* Determine if we currently own this command.
*/
dev = scsi_transport_device_data(cmd->device);
if (dev == NULL) {
/*
* No target device for this command exists,
* so we must not still own the command.
*/
scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
return SUCCESS;
}
/*
* Generate us a new SCB
*/
reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
if (!reset_scb) {
scmd_printk(KERN_INFO, cmd, "No SCB available\n");
return FAILED;
}
tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
cmd->device->id, &tstate);
reset_scb->io_ctx = cmd;
reset_scb->platform_data->dev = dev;
reset_scb->sg_count = 0;
ahd_set_residual(reset_scb, 0);
ahd_set_sense_residual(reset_scb, 0);
reset_scb->platform_data->xfer_len = 0;
reset_scb->hscb->control = 0;
reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
reset_scb->hscb->lun = cmd->device->lun;
reset_scb->hscb->cdb_len = 0;
reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
reset_scb->flags |= SCB_PACKETIZED;
} else {
reset_scb->hscb->control |= MK_MESSAGE;
}
dev->openings--;
dev->active++;
dev->commands_issued++;
ahd_lock(ahd, &flags);
LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
ahd_queue_scb(ahd, reset_scb);
ahd->platform_data->eh_done = &done;
ahd_unlock(ahd, &flags);
printf("%s: Device reset code sleeping\n", ahd_name(ahd));
if (!wait_for_completion_timeout(&done, 5 * HZ)) {
ahd_lock(ahd, &flags);
ahd->platform_data->eh_done = NULL;
ahd_unlock(ahd, &flags);
printf("%s: Device reset timer expired (active %d)\n",
ahd_name(ahd), dev->active);
retval = FAILED;
}
printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
return (retval);
}
/*
@ -1891,72 +1975,108 @@ ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
static void
ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
{
int status;
int new_status = DID_OK;
int do_fallback = 0;
int scsi_status;
/*
* Map CAM error codes into Linux Error codes. We
* avoid the conversion so that the DV code has the
* full error information available when making
* state change decisions.
*/
{
uint32_t status;
u_int new_status;
status = ahd_cmd_get_transaction_status(cmd);
switch (status) {
case CAM_REQ_INPROG:
case CAM_REQ_CMP:
case CAM_SCSI_STATUS_ERROR:
new_status = DID_OK;
break;
case CAM_REQ_ABORTED:
new_status = DID_ABORT;
break;
case CAM_BUSY:
new_status = DID_BUS_BUSY;
break;
case CAM_REQ_INVALID:
case CAM_PATH_INVALID:
new_status = DID_BAD_TARGET;
break;
case CAM_SEL_TIMEOUT:
new_status = DID_NO_CONNECT;
break;
case CAM_SCSI_BUS_RESET:
case CAM_BDR_SENT:
new_status = DID_RESET;
break;
case CAM_UNCOR_PARITY:
new_status = DID_PARITY;
break;
case CAM_CMD_TIMEOUT:
new_status = DID_TIME_OUT;
break;
case CAM_UA_ABORT:
case CAM_REQ_CMP_ERR:
case CAM_AUTOSENSE_FAIL:
case CAM_NO_HBA:
case CAM_DATA_RUN_ERR:
case CAM_UNEXP_BUSFREE:
case CAM_SEQUENCE_FAIL:
case CAM_CCB_LEN_ERR:
case CAM_PROVIDE_FAIL:
case CAM_REQ_TERMIO:
case CAM_UNREC_HBA_ERROR:
case CAM_REQ_TOO_BIG:
new_status = DID_ERROR;
break;
case CAM_REQUEUE_REQ:
new_status = DID_REQUEUE;
status = ahd_cmd_get_transaction_status(cmd);
switch (status) {
case CAM_REQ_INPROG:
case CAM_REQ_CMP:
new_status = DID_OK;
break;
case CAM_AUTOSENSE_FAIL:
new_status = DID_ERROR;
/* Fallthrough */
case CAM_SCSI_STATUS_ERROR:
scsi_status = ahd_cmd_get_scsi_status(cmd);
switch(scsi_status) {
case SCSI_STATUS_CMD_TERMINATED:
case SCSI_STATUS_CHECK_COND:
if ((cmd->result >> 24) != DRIVER_SENSE) {
do_fallback = 1;
} else {
struct scsi_sense_data *sense;
sense = (struct scsi_sense_data *)
&cmd->sense_buffer;
if (sense->extra_len >= 5 &&
(sense->add_sense_code == 0x47
|| sense->add_sense_code == 0x48))
do_fallback = 1;
}
break;
default:
/* We should never get here */
new_status = DID_ERROR;
break;
}
ahd_cmd_set_transaction_status(cmd, new_status);
break;
case CAM_REQ_ABORTED:
new_status = DID_ABORT;
break;
case CAM_BUSY:
new_status = DID_BUS_BUSY;
break;
case CAM_REQ_INVALID:
case CAM_PATH_INVALID:
new_status = DID_BAD_TARGET;
break;
case CAM_SEL_TIMEOUT:
new_status = DID_NO_CONNECT;
break;
case CAM_SCSI_BUS_RESET:
case CAM_BDR_SENT:
new_status = DID_RESET;
break;
case CAM_UNCOR_PARITY:
new_status = DID_PARITY;
do_fallback = 1;
break;
case CAM_CMD_TIMEOUT:
new_status = DID_TIME_OUT;
do_fallback = 1;
break;
case CAM_REQ_CMP_ERR:
case CAM_UNEXP_BUSFREE:
case CAM_DATA_RUN_ERR:
new_status = DID_ERROR;
do_fallback = 1;
break;
case CAM_UA_ABORT:
case CAM_NO_HBA:
case CAM_SEQUENCE_FAIL:
case CAM_CCB_LEN_ERR:
case CAM_PROVIDE_FAIL:
case CAM_REQ_TERMIO:
case CAM_UNREC_HBA_ERROR:
case CAM_REQ_TOO_BIG:
new_status = DID_ERROR;
break;
case CAM_REQUEUE_REQ:
new_status = DID_REQUEUE;
break;
default:
/* We should never get here */
new_status = DID_ERROR;
break;
}
if (do_fallback) {
printf("%s: device overrun (status %x) on %d:%d:%d\n",
ahd_name(ahd), status, cmd->device->channel,
cmd->device->id, cmd->device->lun);
}
ahd_cmd_set_transaction_status(cmd, new_status);
cmd->scsi_done(cmd);
}
@ -1973,7 +2093,7 @@ ahd_release_simq(struct ahd_softc *ahd)
}
static int
ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
{
struct ahd_softc *ahd;
struct ahd_linux_device *dev;
@ -1988,7 +2108,6 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
int paused;
int wait;
int disconnected;
int found;
ahd_mode_state saved_modes;
unsigned long flags;
@ -1998,8 +2117,7 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
scmd_printk(KERN_INFO, cmd,
"Attempting to queue a%s message:",
flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
"Attempting to queue an ABORT message:");
printf("CDB:");
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
@ -2035,19 +2153,6 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
break;
}
if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
/* Any SCB for this device will do for a target reset */
LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
if (ahd_match_scb(ahd, pending_scb,
scmd_id(cmd),
scmd_channel(cmd) + 'A',
CAM_LUN_WILDCARD,
SCB_LIST_NULL, ROLE_INITIATOR))
break;
}
}
if (pending_scb == NULL) {
scmd_printk(KERN_INFO, cmd, "Command not found\n");
goto no_cmd;
@ -2081,25 +2186,17 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
ahd_dump_card_state(ahd);
disconnected = TRUE;
if (flag == SCB_ABORT) {
if (ahd_search_qinfifo(ahd, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun,
pending_scb->hscb->tag,
ROLE_INITIATOR, CAM_REQ_ABORTED,
SEARCH_COMPLETE) > 0) {
printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
ahd_name(ahd), cmd->device->channel,
cmd->device->id, cmd->device->lun);
retval = SUCCESS;
goto done;
}
} else if (ahd_search_qinfifo(ahd, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun, pending_scb->hscb->tag,
ROLE_INITIATOR, /*status*/0,
SEARCH_COUNT) > 0) {
disconnected = FALSE;
if (ahd_search_qinfifo(ahd, cmd->device->id,
cmd->device->channel + 'A',
cmd->device->lun,
pending_scb->hscb->tag,
ROLE_INITIATOR, CAM_REQ_ABORTED,
SEARCH_COMPLETE) > 0) {
printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
ahd_name(ahd), cmd->device->channel,
cmd->device->id, cmd->device->lun);
retval = SUCCESS;
goto done;
}
saved_modes = ahd_save_modes(ahd);
@ -2107,17 +2204,12 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
last_phase = ahd_inb(ahd, LASTPHASE);
saved_scbptr = ahd_get_scbptr(ahd);
active_scbptr = saved_scbptr;
if (disconnected && ((last_phase != P_BUSFREE) ||
(ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
struct scb *bus_scb;
bus_scb = ahd_lookup_scb(ahd, active_scbptr);
if (bus_scb == pending_scb)
disconnected = FALSE;
else if (flag != SCB_ABORT
&& ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
&& ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
disconnected = FALSE;
}
/*
@ -2126,41 +2218,26 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
* bus or is in the disconnected state.
*/
saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
if (SCB_GET_TAG(pending_scb) == active_scbptr
|| (flag == SCB_DEVICE_RESET
&& SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
if (last_phase != P_BUSFREE
&& SCB_GET_TAG(pending_scb) == active_scbptr) {
/*
* We're active on the bus, so assert ATN
* and hope that the target responds.
*/
pending_scb = ahd_lookup_scb(ahd, active_scbptr);
pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
ahd_outb(ahd, MSG_OUT, HOST_MSG);
ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
wait = TRUE;
} else if (last_phase != P_BUSFREE
&& ahd_inb(ahd, SCSIPHASE) == 0) {
/*
* SCB is not identified, there
* is no pending REQ, and the sequencer
* has not seen a busfree. Looks like
* a stuck connection waiting to
* go busfree. Reset the bus.
*/
found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
/*Initiate Reset*/TRUE);
printf("%s: Issued Channel %c Bus Reset. "
"%d SCBs aborted\n", ahd_name(ahd),
cmd->device->channel + 'A', found);
} else if (disconnected) {
/*
* Actually re-queue this SCB in an attempt
* to select the device before it reconnects.
*/
pending_scb->flags |= SCB_RECOVERY_SCB|flag;
pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
pending_scb->hscb->cdb_len = 0;
pending_scb->hscb->task_attribute = 0;