[SCSI] lpfc 8.3.32: Correct provisioning change failure on local function
Fixed system held-up when performing resource provsion through same PCI
function
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index a79e2c2..374c102 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -73,6 +73,8 @@
static int lpfc_sli4_cq_event_pool_create(struct lpfc_hba *);
static void lpfc_sli4_cq_event_pool_destroy(struct lpfc_hba *);
static void lpfc_sli4_cq_event_release_all(struct lpfc_hba *);
+static void lpfc_sli4_disable_intr(struct lpfc_hba *);
+static uint32_t lpfc_sli4_enable_intr(struct lpfc_hba *, uint32_t);
static struct scsi_transport_template *lpfc_transport_template = NULL;
static struct scsi_transport_template *lpfc_vport_transport_template = NULL;
@@ -1169,7 +1171,7 @@
spin_lock_irq(&phba->hbalock);
psli->sli_flag &= ~LPFC_SLI_ACTIVE;
spin_unlock_irq(&phba->hbalock);
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_NO_WAIT);
lpfc_offline(phba);
lpfc_reset_barrier(phba);
@@ -1193,7 +1195,7 @@
static void
lpfc_sli4_offline_eratt(struct lpfc_hba *phba)
{
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_NO_WAIT);
lpfc_offline(phba);
lpfc_sli4_brdreset(phba);
lpfc_hba_down_post(phba);
@@ -1251,7 +1253,7 @@
* There was a firmware error. Take the hba offline and then
* attempt to restart it.
*/
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_WAIT);
lpfc_offline(phba);
/* Wait for the ER1 bit to clear.*/
@@ -1372,7 +1374,7 @@
* There was a firmware error. Take the hba offline and then
* attempt to restart it.
*/
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_NO_WAIT);
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
if (lpfc_online(phba) == 0) { /* Initialize the HBA */
@@ -1428,6 +1430,54 @@
}
/**
+ * lpfc_sli4_port_sta_fn_reset - The SLI4 function reset due to port status reg
+ * @phba: pointer to lpfc hba data structure.
+ * @mbx_action: flag for mailbox shutdown action.
+ *
+ * This routine is invoked to perform an SLI4 port PCI function reset in
+ * response to port status register polling attention. It waits for port
+ * status register (ERR, RDY, RN) bits before proceeding with function reset.
+ * During this process, interrupt vectors are freed and later requested
+ * for handling possible port resource change.
+ **/
+static int
+lpfc_sli4_port_sta_fn_reset(struct lpfc_hba *phba, int mbx_action)
+{
+ int rc;
+ uint32_t intr_mode;
+
+ /*
+ * On error status condition, driver need to wait for port
+ * ready before performing reset.
+ */
+ rc = lpfc_sli4_pdev_status_reg_wait(phba);
+ if (!rc) {
+ /* need reset: attempt for port recovery */
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "2887 Reset Needed: Attempting Port "
+ "Recovery...\n");
+ lpfc_offline_prep(phba, mbx_action);
+ lpfc_offline(phba);
+ /* release interrupt for possible resource change */
+ lpfc_sli4_disable_intr(phba);
+ lpfc_sli_brdrestart(phba);
+ /* request and enable interrupt */
+ intr_mode = lpfc_sli4_enable_intr(phba, phba->intr_mode);
+ if (intr_mode == LPFC_INTR_ERROR) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "3175 Failed to enable interrupt\n");
+ return -EIO;
+ } else {
+ phba->intr_mode = intr_mode;
+ }
+ rc = lpfc_online(phba);
+ if (rc == 0)
+ lpfc_unblock_mgmt_io(phba);
+ }
+ return rc;
+}
+
+/**
* lpfc_handle_eratt_s4 - The SLI4 HBA hardware error handler
* @phba: pointer to lpfc hba data structure.
*
@@ -1506,30 +1556,18 @@
reg_err2 == SLIPORT_ERR2_REG_FUNC_PROVISON)
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"3145 Port Down: Provisioning\n");
- /*
- * On error status condition, driver need to wait for port
- * ready before performing reset.
- */
- rc = lpfc_sli4_pdev_status_reg_wait(phba);
- if (!rc) {
- /* need reset: attempt for port recovery */
- lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
- "2887 Reset Needed: Attempting Port "
- "Recovery...\n");
- lpfc_offline_prep(phba);
- lpfc_offline(phba);
- lpfc_sli_brdrestart(phba);
- if (lpfc_online(phba) == 0) {
- lpfc_unblock_mgmt_io(phba);
- /* don't report event on forced debug dump */
- if (reg_err1 == SLIPORT_ERR1_REG_ERR_CODE_2 &&
- reg_err2 == SLIPORT_ERR2_REG_FORCED_DUMP)
- return;
- else
- break;
- }
- /* fall through for not able to recover */
+
+ /* Check port status register for function reset */
+ rc = lpfc_sli4_port_sta_fn_reset(phba, LPFC_MBX_NO_WAIT);
+ if (rc == 0) {
+ /* don't report event on forced debug dump */
+ if (reg_err1 == SLIPORT_ERR1_REG_ERR_CODE_2 &&
+ reg_err2 == SLIPORT_ERR2_REG_FORCED_DUMP)
+ return;
+ else
+ break;
}
+ /* fall through for not able to recover */
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"3152 Unrecoverable error, bring the port "
"offline\n");
@@ -2494,15 +2532,19 @@
* driver prepares the HBA interface for online or offline.
**/
static void
-lpfc_block_mgmt_io(struct lpfc_hba * phba)
+lpfc_block_mgmt_io(struct lpfc_hba *phba, int mbx_action)
{
unsigned long iflag;
uint8_t actcmd = MBX_HEARTBEAT;
unsigned long timeout;
- timeout = msecs_to_jiffies(LPFC_MBOX_TMO * 1000) + jiffies;
spin_lock_irqsave(&phba->hbalock, iflag);
phba->sli.sli_flag |= LPFC_BLOCK_MGMT_IO;
+ spin_unlock_irqrestore(&phba->hbalock, iflag);
+ if (mbx_action == LPFC_MBX_NO_WAIT)
+ return;
+ timeout = msecs_to_jiffies(LPFC_MBOX_TMO * 1000) + jiffies;
+ spin_lock_irqsave(&phba->hbalock, iflag);
if (phba->sli.mbox_active) {
actcmd = phba->sli.mbox_active->u.mb.mbxCommand;
/* Determine how long we might wait for the active mailbox
@@ -2592,7 +2634,7 @@
lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
"0458 Bring Adapter online\n");
- lpfc_block_mgmt_io(phba);
+ lpfc_block_mgmt_io(phba, LPFC_MBX_WAIT);
if (!lpfc_sli_queue_setup(phba)) {
lpfc_unblock_mgmt_io(phba);
@@ -2660,7 +2702,7 @@
* queue to make it ready to be brought offline.
**/
void
-lpfc_offline_prep(struct lpfc_hba * phba)
+lpfc_offline_prep(struct lpfc_hba *phba, int mbx_action)
{
struct lpfc_vport *vport = phba->pport;
struct lpfc_nodelist *ndlp, *next_ndlp;
@@ -2671,7 +2713,7 @@
if (vport->fc_flag & FC_OFFLINE_MODE)
return;
- lpfc_block_mgmt_io(phba);
+ lpfc_block_mgmt_io(phba, mbx_action);
lpfc_linkdown(phba);
@@ -2718,7 +2760,7 @@
}
lpfc_destroy_vport_work_array(phba, vports);
- lpfc_sli_mbox_sys_shutdown(phba);
+ lpfc_sli_mbox_sys_shutdown(phba, mbx_action);
}
/**
@@ -4312,7 +4354,7 @@
phba->link_state = LPFC_HBA_ERROR;
return;
}
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_WAIT);
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
lpfc_online(phba);
@@ -8890,7 +8932,7 @@
"0473 PCI device Power Management suspend.\n");
/* Bring down the device */
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_WAIT);
lpfc_offline(phba);
kthread_stop(phba->worker_thread);
@@ -9016,7 +9058,7 @@
"2710 PCI channel disable preparing for reset\n");
/* Block any management I/Os to the device */
- lpfc_block_mgmt_io(phba);
+ lpfc_block_mgmt_io(phba, LPFC_MBX_WAIT);
/* Block all SCSI devices' I/Os on the host */
lpfc_scsi_dev_block(phba);
@@ -9160,7 +9202,7 @@
phba->intr_mode = intr_mode;
/* Take device offline, it will perform cleanup */
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_WAIT);
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
@@ -9634,7 +9676,7 @@
"2843 PCI device Power Management suspend.\n");
/* Bring down the device */
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_WAIT);
lpfc_offline(phba);
kthread_stop(phba->worker_thread);
@@ -9760,7 +9802,7 @@
"2826 PCI channel disable preparing for reset\n");
/* Block any management I/Os to the device */
- lpfc_block_mgmt_io(phba);
+ lpfc_block_mgmt_io(phba, LPFC_MBX_NO_WAIT);
/* Block all SCSI devices' I/Os on the host */
lpfc_scsi_dev_block(phba);
@@ -9933,7 +9975,7 @@
*/
if (!(phba->sli.sli_flag & LPFC_SLI_ACTIVE)) {
/* Perform device reset */
- lpfc_offline_prep(phba);
+ lpfc_offline_prep(phba, LPFC_MBX_WAIT);
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
/* Bring the device back online */