lpfc 8.3.13: Add TX Queue Support for SLI4 ELS commands.

diff -upNr a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
@@ -1949,6 +1949,59 @@ static DEVICE_ATTR(lpfc_enable_npiv, S_I
 LPFC_ATTR_R(suppress_link_up, LPFC_INITIALIZE_LINK, LPFC_INITIALIZE_LINK,
 		LPFC_DELAY_INIT_LINK_INDEFINITELY,
 		"Suppress Link Up at initialization");
+/*
+# lpfc_cnt: Number of IOCBs allocated for ELS, CT, and ABTS
+#       1 - (1024)
+#       2 - (2048)
+#       3 - (3072)
+#       4 - (4096)
+#       5 - (5120)
+*/
+static ssize_t
+lpfc_iocb_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", phba->iocb_max);
+}
+
+static DEVICE_ATTR(iocb_hw, S_IRUGO,
+			 lpfc_iocb_hw_show, NULL);
+static ssize_t
+lpfc_txq_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+		phba->sli.ring[LPFC_ELS_RING].txq_max);
+}
+
+static DEVICE_ATTR(txq_hw, S_IRUGO,
+			 lpfc_txq_hw_show, NULL);
+static ssize_t
+lpfc_txcmplq_hw_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+		phba->sli.ring[LPFC_ELS_RING].txcmplq_max);
+}
+
+static DEVICE_ATTR(txcmplq_hw, S_IRUGO,
+			 lpfc_txcmplq_hw_show, NULL);
+
+int lpfc_iocb_cnt = 2;
+module_param(lpfc_iocb_cnt, int, 1);
+MODULE_PARM_DESC(lpfc_iocb_cnt,
+	"Number of IOCBs alloc for ELS, CT, and ABTS: 1k to 5k IOCBs");
+lpfc_param_show(iocb_cnt);
+lpfc_param_init(iocb_cnt, 2, 1, 5);
+static DEVICE_ATTR(lpfc_iocb_cnt, S_IRUGO,
+			 lpfc_iocb_cnt_show, NULL);
 
 /*
 # lpfc_nodev_tmo: If set, it will hold all I/O errors on devices that disappear

@@ -3334,6 +3387,10 @@ struct device_attribute *lpfc_hba_attrs[
 	&dev_attr_lpfc_aer_support,
 	&dev_attr_lpfc_aer_state_cleanup,
 	&dev_attr_lpfc_suppress_link_up,
+	&dev_attr_lpfc_iocb_cnt,
+	&dev_attr_iocb_hw,
+	&dev_attr_txq_hw,
+	&dev_attr_txcmplq_hw,
 	NULL,
 };
 

@@ -4521,6 +4578,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
 	lpfc_hba_log_verbose_init(phba, lpfc_log_verbose);
 	lpfc_aer_support_init(phba, lpfc_aer_support);
 	lpfc_suppress_link_up_init(phba, lpfc_suppress_link_up);
+	lpfc_iocb_cnt_init(phba, lpfc_iocb_cnt);
 	return;
 }
 

diff -upNr a/drivers/scsi/lpfc/lpfc_bsg.c b/drivers/scsi/lpfc/lpfc_bsg.c
@@ -377,6 +377,11 @@ lpfc_bsg_send_mgmt_cmd(struct fc_bsg_job
 
 	if (rc == IOCB_SUCCESS)
 		return 0; /* done for now */
+	else if (rc == IOCB_BUSY)
+		rc = EAGAIN;
+	else
+		rc = EIO;
+
 
 	/* iocb failed so cleanup */
 	pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,

@@ -625,6 +630,10 @@ lpfc_bsg_rport_els(struct fc_bsg_job *jo
 	lpfc_nlp_put(ndlp);
 	if (rc == IOCB_SUCCESS)
 		return 0; /* done for now */
+	else if (rc == IOCB_BUSY)
+		rc = EAGAIN;
+	else
+		rc = EIO;
 
 	pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
 		     job->request_payload.sg_cnt, DMA_TO_DEVICE);

diff -upNr a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -403,3 +403,12 @@ int lpfc_bsg_request(struct fc_bsg_job *
 int lpfc_bsg_timeout(struct fc_bsg_job *);
 int lpfc_bsg_ct_unsol_event(struct lpfc_hba *, struct lpfc_sli_ring *,
 			     struct lpfc_iocbq *);
+void __lpfc_sli_ringtx_put(struct lpfc_hba *, struct lpfc_sli_ring *,
+	struct lpfc_iocbq *);
+struct lpfc_iocbq *lpfc_sli_ringtx_get(struct lpfc_hba *,
+	struct lpfc_sli_ring *);
+int __lpfc_sli_issue_iocb(struct lpfc_hba *, uint32_t,
+	struct lpfc_iocbq *, uint32_t);
+uint32_t lpfc_drain_txq(struct lpfc_hba *);
+
+

diff -upNr a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
@@ -1472,8 +1472,12 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phb
 			}
 			goto out;
 		}
-		/* PLOGI failed */
-		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+		/* PLOGI failed Don't print the vport to vport rjts */
+		if (irsp->ulpStatus != IOSTAT_LS_RJT ||
+			(((irsp->un.ulpWord[4]) >> 16 != LSRJT_INVALID_CMD) &&
+			((irsp->un.ulpWord[4]) >> 16 != LSRJT_UNABLE_TPC)) ||
+			(phba)->pport->cfg_log_verbose & LOG_ELS)
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 				 "2753 PLOGI failure DID:%06X Status:x%x/x%x\n",
 				 ndlp->nlp_DID, irsp->ulpStatus,
 				 irsp->un.ulpWord[4]);

@@ -5144,6 +5148,7 @@ lpfc_els_timeout(unsigned long ptr)
 	return;
 }
 
+
 /**
  * lpfc_els_timeout_handler - Process an els timeout event
  * @vport: pointer to a virtual N_Port data structure.

@@ -5164,13 +5169,19 @@ lpfc_els_timeout_handler(struct lpfc_vpo
 	uint32_t els_command = 0;
 	uint32_t timeout;
 	uint32_t remote_ID = 0xffffffff;
+	LIST_HEAD(txcmplq_completions);
+	LIST_HEAD(abort_list);
+
 
-	spin_lock_irq(&phba->hbalock);
 	timeout = (uint32_t)(phba->fc_ratov << 1);
 
 	pring = &phba->sli.ring[LPFC_ELS_RING];
 
-	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
+	spin_lock_irq(&phba->hbalock);
+	list_splice_init(&pring->txcmplq, &txcmplq_completions);
+	spin_unlock_irq(&phba->hbalock);
+
+	list_for_each_entry_safe(piocb, tmp_iocb, &txcmplq_completions, list) {
 		cmd = &piocb->iocb;
 
 		if ((piocb->iocb_flag & LPFC_IO_LIBDFC) != 0 ||

@@ -5207,13 +5218,22 @@ lpfc_els_timeout_handler(struct lpfc_vpo
 			if (ndlp && NLP_CHK_NODE_ACT(ndlp))
 				remote_ID = ndlp->nlp_DID;
 		}
+		list_add_tail(&piocb->dlist, &abort_list);
+	}
+	spin_lock_irq(&phba->hbalock);
+	list_splice(&txcmplq_completions, &pring->txcmplq);
+	spin_unlock_irq(&phba->hbalock);
+
+	list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
 		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
-				 "0127 ELS timeout Data: x%x x%x x%x "
-				 "x%x\n", els_command,
-				 remote_ID, cmd->ulpCommand, cmd->ulpIoTag);
+			 "0127 ELS timeout Data: x%x x%x x%x "
+			 "x%x\n", els_command,
+			 remote_ID, cmd->ulpCommand, cmd->ulpIoTag);
+		spin_lock_irq(&phba->hbalock);
+		list_del_init(&piocb->dlist);
 		lpfc_sli_issue_abort_iotag(phba, pring, piocb);
+		spin_unlock_irq(&phba->hbalock);
 	}
-	spin_unlock_irq(&phba->hbalock);
 
 	if (phba->sli.ring[LPFC_ELS_RING].txcmplq_cnt)
 		mod_timer(&vport->els_tmofunc, jiffies + HZ * timeout);

diff -upNr a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
@@ -20,7 +20,6 @@
  *******************************************************************/
 
 #include <scsi/scsi_host.h>
-
 struct lpfc_sli2_slim;
 
 #define LPFC_PCI_DEV_LP		0x1

@@ -376,6 +375,7 @@ struct lpfc_vport {
 #define WORKER_FABRIC_BLOCK_TMO        0x400	/* hba: fabric block timeout */
 #define WORKER_RAMP_DOWN_QUEUE         0x800	/* hba: Decrease Q depth */
 #define WORKER_RAMP_UP_QUEUE           0x1000	/* hba: Increase Q depth */
+#define WORKER_SERVICE_TXQ             0x2000	/* hba: IOCBs on the txq */
 
 	struct timer_list fc_fdmitmo;
 	struct timer_list els_tmofunc;

@@ -624,6 +624,7 @@ struct lpfc_hba {
 	uint32_t cfg_hostmem_hgp;
 	uint32_t cfg_log_verbose;
 	uint32_t cfg_aer_support;
+	uint32_t cfg_iocb_cnt;
 	uint32_t cfg_suppress_link_up;
 #define LPFC_INITIALIZE_LINK              0	/* do normal init_link mbox */
 #define LPFC_DELAY_INIT_LINK              1	/* layered driver hold off */

@@ -812,6 +813,8 @@ struct lpfc_hba {
 
 	uint8_t menlo_flag;	/* menlo generic flags */
 #define HBA_MENLO_SUPPORT	0x1 /* HBA supports menlo commands */
+	uint32_t iocb_cnt;
+	uint32_t iocb_max;
 };
 
 static inline struct Scsi_Host *

diff -upNr a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -587,6 +587,8 @@ lpfc_work_done(struct lpfc_hba *phba)
 							(status &
 							 HA_RXMASK));
 		}
+		if (phba->pport->work_port_events & WORKER_SERVICE_TXQ)
+			lpfc_drain_txq(phba);
 		/*
 		 * Turn on Ring interrupts
 		 */

diff -upNr a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
@@ -8147,8 +8147,12 @@ lpfc_pci_probe_one_s4(struct pci_dev *pd
 	}
 
 	/* Initialize and populate the iocb list per host */
-	error = lpfc_init_iocb_list(phba,
-			phba->sli4_hba.max_cfg_param.max_xri);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+			"2821 initialize iocb list %d.\n",
+			phba->cfg_iocb_cnt*1024);
+	error = lpfc_init_iocb_list(phba, phba->cfg_iocb_cnt*1024);
+
 	if (error) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 				"1413 Failed to initialize iocb list.\n");

diff -upNr a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -190,6 +190,7 @@ lpfc_check_elscmpl_iocb(struct lpfc_hba 
 }
 
 
+
 /*
  * Free resources / clean up outstanding I/Os
  * associated with a LPFC_NODELIST entry. This

@@ -199,13 +200,15 @@ int
 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 {
 	LIST_HEAD(completions);
+	LIST_HEAD(txcmplq_completions);
+	LIST_HEAD(abort_list);
 	struct lpfc_sli  *psli = &phba->sli;
 	struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 	struct lpfc_iocbq *iocb, *next_iocb;
 
 	/* Abort outstanding I/O on NPort <nlp_DID> */
 	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
-			 "0205 Abort outstanding I/O on NPort x%x "
+			 "2819 Abort outstanding I/O on NPort x%x "
 			 "Data: x%x x%x x%x\n",
 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 			 ndlp->nlp_rpi);

@@ -224,14 +227,25 @@ lpfc_els_abort(struct lpfc_hba *phba, st
 	}
 
 	/* Next check the txcmplq */
-	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
+	list_splice_init(&pring->txcmplq, &txcmplq_completions);
+	spin_unlock_irq(&phba->hbalock);
+
+	list_for_each_entry_safe(iocb, next_iocb, &txcmplq_completions, list) {
 		/* Check to see if iocb matches the nport we are looking for */
-		if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
-			lpfc_sli_issue_abort_iotag(phba, pring, iocb);
-		}
+		if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
+			list_add_tail(&iocb->dlist, &abort_list);
 	}
+	spin_lock_irq(&phba->hbalock);
+	list_splice(&txcmplq_completions, &pring->txcmplq);
 	spin_unlock_irq(&phba->hbalock);
 
+	list_for_each_entry_safe(iocb, next_iocb, &abort_list, dlist) {
+			spin_lock_irq(&phba->hbalock);
+			list_del_init(&iocb->dlist);
+			lpfc_sli_issue_abort_iotag(phba, pring, iocb);
+			spin_unlock_irq(&phba->hbalock);
+	}
+
 	/* Cancel all the IOCBs from the completions list */
 	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 			      IOERR_SLI_ABORTED);

diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -3228,7 +3228,9 @@ lpfc_send_taskmgmt(struct lpfc_vport *vp
 			 lpfc_taskmgmt_name(task_mgmt_cmd),
 			 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
 			 iocbqrsp->iocb.un.ulpWord[4]);
-	} else
+	} else if (status == IOCB_BUSY)
+		ret = FAILED;
+	else
 		ret = SUCCESS;
 
 	lpfc_sli_release_iocbq(phba, iocbqrsp);

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diff -upNr a/drivers/scsi/lpfc/lpfc_sli.h b/drivers/scsi/lpfc/lpfc_sli.h
@@ -48,6 +48,7 @@ struct lpfc_iocbq {
 	/* lpfc_iocbqs are used in double linked lists */
 	struct list_head list;
 	struct list_head clist;
+	struct list_head dlist;
 	uint16_t iotag;         /* pre-assigned IO tag */
 	uint16_t sli4_xritag;   /* pre-assigned XRI, (OXID) tag. */
 	struct lpfc_cq_event cq_event;

@@ -64,6 +65,7 @@ struct lpfc_iocbq {
 #define LPFC_EXCHANGE_BUSY	0x40    /* SLI4 hba reported XB in response */
 #define LPFC_USE_FCPWQIDX	0x80    /* Submit to specified FCPWQ index */
 #define DSS_SECURITY_OP		0x100	/* security IO */
+#define LPFC_IO_ON_Q		0x200	/* The IO is still on the TXCMPLQ */
 
 #define LPFC_FIP_ELS_ID_MASK	0xc000	/* ELS_ID range 0-3, non-shifted mask */
 #define LPFC_FIP_ELS_ID_SHIFT	14