[SCSI] lpfc 8.3.19: Added support for ELS RRQ command

Added support for ELS RRQ command

- Add new routine lpfc_set_rrq_active() to track XRI qualifier state.
- Add new module parameter lpfc_enable_rrq to control RRQ operation.
- Add logic to ELS RRQ completion handler and xri qualifier timeout
  to clear XRI qualifier state.
- Use OX_ID from XRI_ABORTED_CQE for RRQ payload.
- Tie abort and XRI_ABORTED_CQE andler to RRQ generation.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 432afc7db1cc..70ba1895b0a1 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -930,6 +930,35 @@ lpfc_hb_timeout(unsigned long ptr)
 }
 
 /**
+ * lpfc_rrq_timeout - The RRQ-timer timeout handler
+ * @ptr: unsigned long holds the pointer to lpfc hba data structure.
+ *
+ * This is the RRQ-timer timeout handler registered to the lpfc driver. When
+ * this timer fires, a RRQ timeout event shall be posted to the lpfc driver
+ * work-port-events bitmap and the worker thread is notified. This timeout
+ * event will be used by the worker thread to invoke the actual timeout
+ * handler routine, lpfc_rrq_handler. Any periodical operations will
+ * be performed in the timeout handler and the RRQ timeout event bit shall
+ * be cleared by the worker thread after it has taken the event bitmap out.
+ **/
+static void
+lpfc_rrq_timeout(unsigned long ptr)
+{
+        struct lpfc_hba *phba;
+        uint32_t tmo_posted;
+        unsigned long iflag;
+
+        phba = (struct lpfc_hba *)ptr;
+        spin_lock_irqsave(&phba->pport->work_port_lock, iflag);
+        tmo_posted = phba->hba_flag & HBA_RRQ_ACTIVE;
+        if (!tmo_posted)
+                phba->hba_flag |= HBA_RRQ_ACTIVE;
+        spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);
+        if (!tmo_posted)
+                lpfc_worker_wake_up(phba);
+}
+
+/**
  * lpfc_hb_mbox_cmpl - The lpfc heart-beat mailbox command callback function
  * @phba: pointer to lpfc hba data structure.
  * @pmboxq: pointer to the driver internal queue element for mailbox command.
@@ -3990,6 +4019,9 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
         init_timer(&phba->hb_tmofunc);
         phba->hb_tmofunc.function = lpfc_hb_timeout;
         phba->hb_tmofunc.data = (unsigned long)phba;
+        init_timer(&phba->rrq_tmr);
+        phba->rrq_tmr.function = lpfc_rrq_timeout;
+        phba->rrq_tmr.data = (unsigned long)phba;
 
         psli = &phba->sli;
         /* MBOX heartbeat timer */
@@ -8192,6 +8224,8 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
                 goto out_unset_driver_resource_s4;
         }
 
+        INIT_LIST_HEAD(&phba->active_rrq_list);
+
         /* Set up common device driver resources */
         error = lpfc_setup_driver_resource_phase2(phba);
         if (error) {