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authorShyam Sunder <shyam.sunder@qlogic.com>2011-12-01 22:42:13 -0800
committerJames Bottomley <JBottomley@Parallels.com>2011-12-15 10:57:42 +0400
commit9ee91a38b1e224b0ee4ddc9a69d41f732d776310 (patch)
tree2a86b0ddd75c76090a7a448794cc0a7ac9e5f194 /drivers/scsi/qla4xxx/ql4_os.c
parent0a24361566d750065849f63521097f8373a0ac6b (diff)
[SCSI] qla4xxx: check for FW alive before calling chip_reset
Check for firmware alive and do premature completion of mbox commands in case of FW hung before doing chip_reset Signed-off-by: Shyam Sunder <shyam.sunder@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Nilesh Javali <nilesh.javali@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_os.c')
-rw-r--r--drivers/scsi/qla4xxx/ql4_os.c75
1 files changed, 51 insertions, 24 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 0c9ee937809..70778d5227a 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -1975,9 +1975,10 @@ mem_alloc_error_exit:
*
* Context: Interrupt
**/
-static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
+static int qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
{
- uint32_t fw_heartbeat_counter, halt_status;
+ uint32_t fw_heartbeat_counter;
+ int status = QLA_SUCCESS;
fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
/* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
@@ -1985,7 +1986,7 @@ static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
"state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
ha->host_no, __func__));
- return;
+ return status;
}
if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
@@ -1993,8 +1994,6 @@ static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
/* FW not alive after 2 seconds */
if (ha->seconds_since_last_heartbeat == 2) {
ha->seconds_since_last_heartbeat = 0;
- halt_status = qla4_8xxx_rd_32(ha,
- QLA82XX_PEG_HALT_STATUS1);
ql4_printk(KERN_INFO, ha,
"scsi(%ld): %s, Dumping hw/fw registers:\n "
@@ -2002,7 +2001,9 @@ static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
" 0x%x,\n PEG_NET_0_PC: 0x%x, PEG_NET_1_PC:"
" 0x%x,\n PEG_NET_2_PC: 0x%x, PEG_NET_3_PC:"
" 0x%x,\n PEG_NET_4_PC: 0x%x\n",
- ha->host_no, __func__, halt_status,
+ ha->host_no, __func__,
+ qla4_8xxx_rd_32(ha,
+ QLA82XX_PEG_HALT_STATUS1),
qla4_8xxx_rd_32(ha,
QLA82XX_PEG_HALT_STATUS2),
qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_0 +
@@ -2015,24 +2016,13 @@ static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
0x3c),
qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_4 +
0x3c));
-
- /* Since we cannot change dev_state in interrupt
- * context, set appropriate DPC flag then wakeup
- * DPC */
- if (halt_status & HALT_STATUS_UNRECOVERABLE)
- set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
- else {
- printk("scsi%ld: %s: detect abort needed!\n",
- ha->host_no, __func__);
- set_bit(DPC_RESET_HA, &ha->dpc_flags);
- }
- qla4xxx_wake_dpc(ha);
- qla4xxx_mailbox_premature_completion(ha);
+ status = QLA_ERROR;
}
} else
ha->seconds_since_last_heartbeat = 0;
ha->fw_heartbeat_counter = fw_heartbeat_counter;
+ return status;
}
/**
@@ -2043,14 +2033,13 @@ static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
**/
void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
{
- uint32_t dev_state;
-
- dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
+ uint32_t dev_state, halt_status;
/* don't poll if reset is going on */
if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags))) {
+ dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
if (dev_state == QLA82XX_DEV_NEED_RESET &&
!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
if (!ql4xdontresethba) {
@@ -2058,7 +2047,6 @@ void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
"NEED RESET!\n", __func__);
set_bit(DPC_RESET_HA, &ha->dpc_flags);
qla4xxx_wake_dpc(ha);
- qla4xxx_mailbox_premature_completion(ha);
}
} else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
!test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
@@ -2068,7 +2056,24 @@ void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
qla4xxx_wake_dpc(ha);
} else {
/* Check firmware health */
- qla4_8xxx_check_fw_alive(ha);
+ if (qla4_8xxx_check_fw_alive(ha)) {
+ halt_status = qla4_8xxx_rd_32(ha,
+ QLA82XX_PEG_HALT_STATUS1);
+
+ /* Since we cannot change dev_state in interrupt
+ * context, set appropriate DPC flag then wakeup
+ * DPC */
+ if (halt_status & HALT_STATUS_UNRECOVERABLE)
+ set_bit(DPC_HA_UNRECOVERABLE,
+ &ha->dpc_flags);
+ else {
+ ql4_printk(KERN_INFO, ha, "%s: detect "
+ "abort needed!\n", __func__);
+ set_bit(DPC_RESET_HA, &ha->dpc_flags);
+ }
+ qla4xxx_mailbox_premature_completion(ha);
+ qla4xxx_wake_dpc(ha);
+ }
}
}
}
@@ -2424,6 +2429,7 @@ static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
int status = QLA_ERROR;
uint8_t reset_chip = 0;
uint32_t dev_state;
+ unsigned long wait;
/* Stall incoming I/O until we are done */
scsi_block_requests(ha->host);
@@ -2474,8 +2480,29 @@ static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
* or if stop_firmware fails for ISP-82xx.
* This is the default case for ISP-4xxx */
if (!is_qla8022(ha) || reset_chip) {
+ if (!is_qla8022(ha))
+ goto chip_reset;
+
+ /* Check if 82XX firmware is alive or not
+ * We may have arrived here from NEED_RESET
+ * detection only */
+ if (test_bit(AF_FW_RECOVERY, &ha->flags))
+ goto chip_reset;
+
+ wait = jiffies + (FW_ALIVE_WAIT_TOV * HZ);
+ while (time_before(jiffies, wait)) {
+ if (qla4_8xxx_check_fw_alive(ha)) {
+ qla4xxx_mailbox_premature_completion(ha);
+ break;
+ }
+
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(HZ);
+ }
+
if (!test_bit(AF_FW_RECOVERY, &ha->flags))
qla4xxx_cmd_wait(ha);
+chip_reset:
qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
DEBUG2(ql4_printk(KERN_INFO, ha,