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hpsa: hpsa decode sense data for io and tmf

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In hba mode, we could get sense data in descriptor format so
we need to handle that.

It's possible for CommandStatus to have value 0x0D
"TMF Function Status", which we should handle.  We will get
this from a P1224 when aborting a non-existent tag, for
example.  The "ScsiStatus" field of the errinfo field
will contain the TMF function status value.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Stephen Cameron 2015-04-23 09:32:16 -05:00 committed by James Bottomley
parent 433b5f4dba
commit 9437ac43ed
2 changed files with 119 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

145
drivers/scsi/hpsa.c
View File

@ -43,6 +43,7 @@
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_eh.h>
#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
@ -268,16 +269,49 @@ static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
return (struct ctlr_info *) *priv;
}
/* extract sense key, asc, and ascq from sense data. -1 means invalid. */
static void decode_sense_data(const u8 *sense_data, int sense_data_len,
u8 *sense_key, u8 *asc, u8 *ascq)
{
struct scsi_sense_hdr sshdr;
bool rc;
*sense_key = -1;
*asc = -1;
*ascq = -1;
if (sense_data_len < 1)
return;
rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
if (rc) {
*sense_key = sshdr.sense_key;
*asc = sshdr.asc;
*ascq = sshdr.ascq;
}
}
static int check_for_unit_attention(struct ctlr_info *h,
struct CommandList *c)
{
if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
u8 sense_key, asc, ascq;
int sense_len;
if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
sense_len = sizeof(c->err_info->SenseInfo);
else
sense_len = c->err_info->SenseLen;
decode_sense_data(c->err_info->SenseInfo, sense_len,
&sense_key, &asc, &ascq);
if (sense_key != UNIT_ATTENTION || asc == -1)
return 0;
switch (c->err_info->SenseInfo[12]) {
switch (asc) {
case STATE_CHANGED:
dev_warn(&h->pdev->dev, HPSA "%d: a state change "
"detected, command retried\n", h->ctlr);
dev_warn(&h->pdev->dev,
HPSA "%d: a state change detected, command retried\n",
h->ctlr);
break;
case LUN_FAILED:
dev_warn(&h->pdev->dev,
@ -1855,6 +1889,34 @@ retry_cmd:
queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
}
/* Returns 0 on success, < 0 otherwise. */
static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
struct CommandList *cp)
{
u8 tmf_status = cp->err_info->ScsiStatus;
switch (tmf_status) {
case CISS_TMF_COMPLETE:
/*
* CISS_TMF_COMPLETE never happens, instead,
* ei->CommandStatus == 0 for this case.
*/
case CISS_TMF_SUCCESS:
return 0;
case CISS_TMF_INVALID_FRAME:
case CISS_TMF_NOT_SUPPORTED:
case CISS_TMF_FAILED:
case CISS_TMF_WRONG_LUN:
case CISS_TMF_OVERLAPPED_TAG:
break;
default:
dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
tmf_status);
break;
}
return -tmf_status;
}
static void complete_scsi_command(struct CommandList *cp)
{
struct scsi_cmnd *cmd;
@ -1862,9 +1924,9 @@ static void complete_scsi_command(struct CommandList *cp)
struct ErrorInfo *ei;
struct hpsa_scsi_dev_t *dev;
unsigned char sense_key;
unsigned char asc; /* additional sense code */
unsigned char ascq; /* additional sense code qualifier */
u8 sense_key;
u8 asc; /* additional sense code */
u8 ascq; /* additional sense code qualifier */
unsigned long sense_data_size;
ei = cp->err_info;
@ -1899,8 +1961,6 @@ static void complete_scsi_command(struct CommandList *cp)
if (cp->cmd_type == CMD_IOACCEL2)
return process_ioaccel2_completion(h, cp, cmd, dev);
cmd->result |= ei->ScsiStatus;
scsi_set_resid(cmd, ei->ResidualCnt);
if (ei->CommandStatus == 0) {
if (cp->cmd_type == CMD_IOACCEL1)
@ -1910,16 +1970,6 @@ static void complete_scsi_command(struct CommandList *cp)
return;
}
/* copy the sense data */
if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
sense_data_size = SCSI_SENSE_BUFFERSIZE;
else
sense_data_size = sizeof(ei->SenseInfo);
if (ei->SenseLen < sense_data_size)
sense_data_size = ei->SenseLen;
memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
/* For I/O accelerator commands, copy over some fields to the normal
* CISS header used below for error handling.
*/
@ -1951,14 +2001,18 @@ static void complete_scsi_command(struct CommandList *cp)
switch (ei->CommandStatus) {
case CMD_TARGET_STATUS:
if (ei->ScsiStatus) {
/* Get sense key */
sense_key = 0xf & ei->SenseInfo[2];
/* Get additional sense code */
asc = ei->SenseInfo[12];
/* Get addition sense code qualifier */
ascq = ei->SenseInfo[13];
}
cmd->result |= ei->ScsiStatus;
/* copy the sense data */
if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
sense_data_size = SCSI_SENSE_BUFFERSIZE;
else
sense_data_size = sizeof(ei->SenseInfo);
if (ei->SenseLen < sense_data_size)
sense_data_size = ei->SenseLen;
memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
if (ei->ScsiStatus)
decode_sense_data(ei->SenseInfo, sense_data_size,
&sense_key, &asc, &ascq);
if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
if (sense_key == ABORTED_COMMAND) {
cmd->result |= DID_SOFT_ERROR << 16;
@ -2053,6 +2107,10 @@ static void complete_scsi_command(struct CommandList *cp)
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "Command unabortable\n");
break;
case CMD_TMF_STATUS:
if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
cmd->result = DID_ERROR << 16;
break;
case CMD_IOACCEL_DISABLED:
/* This only handles the direct pass-through case since RAID
* offload is handled above. Just attempt a retry.
@ -2203,16 +2261,23 @@ static void hpsa_scsi_interpret_error(struct ctlr_info *h,
{
const struct ErrorInfo *ei = cp->err_info;
struct device *d = &cp->h->pdev->dev;
const u8 *sd = ei->SenseInfo;
u8 sense_key, asc, ascq;
int sense_len;
switch (ei->CommandStatus) {
case CMD_TARGET_STATUS:
if (ei->SenseLen > sizeof(ei->SenseInfo))
sense_len = sizeof(ei->SenseInfo);
else
sense_len = ei->SenseLen;
decode_sense_data(ei->SenseInfo, sense_len,
&sense_key, &asc, &ascq);
hpsa_print_cmd(h, "SCSI status", cp);
if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
dev_warn(d, "SCSI Status = 02, Sense key = %02x, ASC = %02x, ASCQ = %02x\n",
sd[2] & 0x0f, sd[12], sd[13]);
dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
sense_key, asc, ascq);
else
dev_warn(d, "SCSI Status = %02x\n", ei->ScsiStatus);
dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
if (ei->ScsiStatus == 0)
dev_warn(d, "SCSI status is abnormally zero. "
"(probably indicates selection timeout "
@ -2757,7 +2822,9 @@ static int hpsa_volume_offline(struct ctlr_info *h,
unsigned char scsi3addr[])
{
struct CommandList *c;
unsigned char *sense, sense_key, asc, ascq;
unsigned char *sense;
u8 sense_key, asc, ascq;
int sense_len;
int rc, ldstat = 0;
u16 cmd_status;
u8 scsi_status;
@ -2775,9 +2842,11 @@ static int hpsa_volume_offline(struct ctlr_info *h,
return 0;
}
sense = c->err_info->SenseInfo;
sense_key = sense[2];
asc = sense[12];
ascq = sense[13];
if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
sense_len = sizeof(c->err_info->SenseInfo);
else
sense_len = c->err_info->SenseLen;
decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
cmd_status = c->err_info->CommandStatus;
scsi_status = c->err_info->ScsiStatus;
cmd_free(h, c);
@ -2853,6 +2922,9 @@ static int hpsa_device_supports_aborts(struct ctlr_info *h,
case CMD_ABORT_FAILED:
rc = 1;
break;
case CMD_TMF_STATUS:
rc = hpsa_evaluate_tmf_status(h, c);
break;
default:
rc = 0;
break;
@ -4650,6 +4722,9 @@ static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
switch (ei->CommandStatus) {
case CMD_SUCCESS:
break;
case CMD_TMF_STATUS:
rc = hpsa_evaluate_tmf_status(h, c);
break;
case CMD_UNABORTABLE: /* Very common, don't make noise. */
rc = -1;
break;

9
drivers/scsi/hpsa_cmd.h
View File

@ -42,6 +42,7 @@
#define CMD_UNSOLICITED_ABORT 0x000A
#define CMD_TIMEOUT 0x000B
#define CMD_UNABORTABLE 0x000C
#define CMD_TMF_STATUS 0x000D
#define CMD_IOACCEL_DISABLED 0x000E
#define CMD_CTLR_LOCKUP 0xffff
/* Note: CMD_CTLR_LOCKUP is not a value defined by the CISS spec
@ -49,6 +50,14 @@
* with when a controller lockup has been detected by the driver
*/
/* TMF function status values */
#define CISS_TMF_COMPLETE 0x00
#define CISS_TMF_INVALID_FRAME 0x02
#define CISS_TMF_NOT_SUPPORTED 0x04
#define CISS_TMF_FAILED 0x05
#define CISS_TMF_SUCCESS 0x08
#define CISS_TMF_WRONG_LUN 0x09
#define CISS_TMF_OVERLAPPED_TAG 0x0a
/* Unit Attentions ASC's as defined for the MSA2012sa */
#define POWER_OR_RESET 0x29