[SCSI] lpfc 8.3.2 : Addition of SLI4 Interface - Queues

Adds support for the new queues in the SLI-4 interface.  There are :
- Work Queues - host-to-adapter for fast-path traffic
- Mailbox Queues - host-to-adapter for control (slow-path)
- Buffer Queues - host-to-adapter for posting buffers for async receive
- Completion Queues - adapter-to-host for posting async events,
       completions for fast or slow patch work, receipt of async
       receive traffic
- Event Queues - tied to MSI-X vectors, binds completion queues with
       interrupts

These patches add the all the support code to tie into command submission
and response paths, updates the interrupt handling, etc.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 3382 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 706bb22a6e8..cf42ada3ffc 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -70,6 +70,350 @@ typedef enum _lpfc_iocb_type {
 	LPFC_ABORT_IOCB
 } lpfc_iocb_type;
 
+
+/* Provide function prototypes local to this module. */
+static int lpfc_sli_issue_mbox_s4(struct lpfc_hba *, LPFC_MBOXQ_t *,
+				  uint32_t);
+static int lpfc_sli4_read_rev(struct lpfc_hba *, LPFC_MBOXQ_t *,
+			    uint8_t *, uint32_t *);
+
+static IOCB_t *
+lpfc_get_iocb_from_iocbq(struct lpfc_iocbq *iocbq)
+{
+	return &iocbq->iocb;
+}
+
+/**
+ * lpfc_sli4_wq_put - Put a Work Queue Entry on an Work Queue
+ * @q: The Work Queue to operate on.
+ * @wqe: The work Queue Entry to put on the Work queue.
+ *
+ * This routine will copy the contents of @wqe to the next available entry on
+ * the @q. This function will then ring the Work Queue Doorbell to signal the
+ * HBA to start processing the Work Queue Entry. This function returns 0 if
+ * successful. If no entries are available on @q then this function will return
+ * -ENOMEM.
+ * The caller is expected to hold the hbalock when calling this routine.
+ **/
+static uint32_t
+lpfc_sli4_wq_put(struct lpfc_queue *q, union lpfc_wqe *wqe)
+{
+	union lpfc_wqe *temp_wqe = q->qe[q->host_index].wqe;
+	struct lpfc_register doorbell;
+	uint32_t host_index;
+
+	/* If the host has not yet processed the next entry then we are done */
+	if (((q->host_index + 1) % q->entry_count) == q->hba_index)
+		return -ENOMEM;
+	/* set consumption flag every once in a while */
+	if (!((q->host_index + 1) % LPFC_RELEASE_NOTIFICATION_INTERVAL))
+		bf_set(lpfc_wqe_gen_wqec, &wqe->generic, 1);
+
+	lpfc_sli_pcimem_bcopy(wqe, temp_wqe, q->entry_size);
+
+	/* Update the host index before invoking device */
+	host_index = q->host_index;
+	q->host_index = ((q->host_index + 1) % q->entry_count);
+
+	/* Ring Doorbell */
+	doorbell.word0 = 0;
+	bf_set(lpfc_wq_doorbell_num_posted, &doorbell, 1);
+	bf_set(lpfc_wq_doorbell_index, &doorbell, host_index);
+	bf_set(lpfc_wq_doorbell_id, &doorbell, q->queue_id);
+	writel(doorbell.word0, q->phba->sli4_hba.WQDBregaddr);
+	readl(q->phba->sli4_hba.WQDBregaddr); /* Flush */
+
+	return 0;
+}
+
+/**
+ * lpfc_sli4_wq_release - Updates internal hba index for WQ
+ * @q: The Work Queue to operate on.
+ * @index: The index to advance the hba index to.
+ *
+ * This routine will update the HBA index of a queue to reflect consumption of
+ * Work Queue Entries by the HBA. When the HBA indicates that it has consumed
+ * an entry the host calls this function to update the queue's internal
+ * pointers. This routine returns the number of entries that were consumed by
+ * the HBA.
+ **/
+static uint32_t
+lpfc_sli4_wq_release(struct lpfc_queue *q, uint32_t index)
+{
+	uint32_t released = 0;
+
+	if (q->hba_index == index)
+		return 0;
+	do {
+		q->hba_index = ((q->hba_index + 1) % q->entry_count);
+		released++;
+	} while (q->hba_index != index);
+	return released;
+}
+
+/**
+ * lpfc_sli4_mq_put - Put a Mailbox Queue Entry on an Mailbox Queue
+ * @q: The Mailbox Queue to operate on.
+ * @wqe: The Mailbox Queue Entry to put on the Work queue.
+ *
+ * This routine will copy the contents of @mqe to the next available entry on
+ * the @q. This function will then ring the Work Queue Doorbell to signal the
+ * HBA to start processing the Work Queue Entry. This function returns 0 if
+ * successful. If no entries are available on @q then this function will return
+ * -ENOMEM.
+ * The caller is expected to hold the hbalock when calling this routine.
+ **/
+static uint32_t
+lpfc_sli4_mq_put(struct lpfc_queue *q, struct lpfc_mqe *mqe)
+{
+	struct lpfc_mqe *temp_mqe = q->qe[q->host_index].mqe;
+	struct lpfc_register doorbell;
+	uint32_t host_index;
+
+	/* If the host has not yet processed the next entry then we are done */
+	if (((q->host_index + 1) % q->entry_count) == q->hba_index)
+		return -ENOMEM;
+	lpfc_sli_pcimem_bcopy(mqe, temp_mqe, q->entry_size);
+	/* Save off the mailbox pointer for completion */
+	q->phba->mbox = (MAILBOX_t *)temp_mqe;
+
+	/* Update the host index before invoking device */
+	host_index = q->host_index;
+	q->host_index = ((q->host_index + 1) % q->entry_count);
+
+	/* Ring Doorbell */
+	doorbell.word0 = 0;
+	bf_set(lpfc_mq_doorbell_num_posted, &doorbell, 1);
+	bf_set(lpfc_mq_doorbell_id, &doorbell, q->queue_id);
+	writel(doorbell.word0, q->phba->sli4_hba.MQDBregaddr);
+	readl(q->phba->sli4_hba.MQDBregaddr); /* Flush */
+	return 0;
+}
+
+/**
+ * lpfc_sli4_mq_release - Updates internal hba index for MQ
+ * @q: The Mailbox Queue to operate on.
+ *
+ * This routine will update the HBA index of a queue to reflect consumption of
+ * a Mailbox Queue Entry by the HBA. When the HBA indicates that it has consumed
+ * an entry the host calls this function to update the queue's internal
+ * pointers. This routine returns the number of entries that were consumed by
+ * the HBA.
+ **/
+static uint32_t
+lpfc_sli4_mq_release(struct lpfc_queue *q)
+{
+	/* Clear the mailbox pointer for completion */
+	q->phba->mbox = NULL;
+	q->hba_index = ((q->hba_index + 1) % q->entry_count);
+	return 1;
+}
+
+/**
+ * lpfc_sli4_eq_get - Gets the next valid EQE from a EQ
+ * @q: The Event Queue to get the first valid EQE from
+ *
+ * This routine will get the first valid Event Queue Entry from @q, update
+ * the queue's internal hba index, and return the EQE. If no valid EQEs are in
+ * the Queue (no more work to do), or the Queue is full of EQEs that have been
+ * processed, but not popped back to the HBA then this routine will return NULL.
+ **/
+static struct lpfc_eqe *
+lpfc_sli4_eq_get(struct lpfc_queue *q)
+{
+	struct lpfc_eqe *eqe = q->qe[q->hba_index].eqe;
+
+	/* If the next EQE is not valid then we are done */
+	if (!bf_get(lpfc_eqe_valid, eqe))
+		return NULL;
+	/* If the host has not yet processed the next entry then we are done */
+	if (((q->hba_index + 1) % q->entry_count) == q->host_index)
+		return NULL;
+
+	q->hba_index = ((q->hba_index + 1) % q->entry_count);
+	return eqe;
+}
+
+/**
+ * lpfc_sli4_eq_release - Indicates the host has finished processing an EQ
+ * @q: The Event Queue that the host has completed processing for.
+ * @arm: Indicates whether the host wants to arms this CQ.
+ *
+ * This routine will mark all Event Queue Entries on @q, from the last
+ * known completed entry to the last entry that was processed, as completed
+ * by clearing the valid bit for each completion queue entry. Then it will
+ * notify the HBA, by ringing the doorbell, that the EQEs have been processed.
+ * The internal host index in the @q will be updated by this routine to indicate
+ * that the host has finished processing the entries. The @arm parameter
+ * indicates that the queue should be rearmed when ringing the doorbell.
+ *
+ * This function will return the number of EQEs that were popped.
+ **/
+uint32_t
+lpfc_sli4_eq_release(struct lpfc_queue *q, bool arm)
+{
+	uint32_t released = 0;
+	struct lpfc_eqe *temp_eqe;
+	struct lpfc_register doorbell;
+
+	/* while there are valid entries */
+	while (q->hba_index != q->host_index) {
+		temp_eqe = q->qe[q->host_index].eqe;
+		bf_set(lpfc_eqe_valid, temp_eqe, 0);
+		released++;
+		q->host_index = ((q->host_index + 1) % q->entry_count);
+	}
+	if (unlikely(released == 0 && !arm))
+		return 0;
+
+	/* ring doorbell for number popped */
+	doorbell.word0 = 0;
+	if (arm) {
+		bf_set(lpfc_eqcq_doorbell_arm, &doorbell, 1);
+		bf_set(lpfc_eqcq_doorbell_eqci, &doorbell, 1);
+	}
+	bf_set(lpfc_eqcq_doorbell_num_released, &doorbell, released);
+	bf_set(lpfc_eqcq_doorbell_qt, &doorbell, LPFC_QUEUE_TYPE_EVENT);
+	bf_set(lpfc_eqcq_doorbell_eqid, &doorbell, q->queue_id);
+	writel(doorbell.word0, q->phba->sli4_hba.EQCQDBregaddr);
+	return released;
+}
+
+/**
+ * lpfc_sli4_cq_get - Gets the next valid CQE from a CQ
+ * @q: The Completion Queue to get the first valid CQE from
+ *
+ * This routine will get the first valid Completion Queue Entry from @q, update
+ * the queue's internal hba index, and return the CQE. If no valid CQEs are in
+ * the Queue (no more work to do), or the Queue is full of CQEs that have been
+ * processed, but not popped back to the HBA then this routine will return NULL.
+ **/
+static struct lpfc_cqe *
+lpfc_sli4_cq_get(struct lpfc_queue *q)
+{
+	struct lpfc_cqe *cqe;
+
+	/* If the next CQE is not valid then we are done */
+	if (!bf_get(lpfc_cqe_valid, q->qe[q->hba_index].cqe))
+		return NULL;
+	/* If the host has not yet processed the next entry then we are done */
+	if (((q->hba_index + 1) % q->entry_count) == q->host_index)
+		return NULL;
+
+	cqe = q->qe[q->hba_index].cqe;
+	q->hba_index = ((q->hba_index + 1) % q->entry_count);
+	return cqe;
+}
+
+/**
+ * lpfc_sli4_cq_release - Indicates the host has finished processing a CQ
+ * @q: The Completion Queue that the host has completed processing for.
+ * @arm: Indicates whether the host wants to arms this CQ.
+ *
+ * This routine will mark all Completion queue entries on @q, from the last
+ * known completed entry to the last entry that was processed, as completed
+ * by clearing the valid bit for each completion queue entry. Then it will
+ * notify the HBA, by ringing the doorbell, that the CQEs have been processed.
+ * The internal host index in the @q will be updated by this routine to indicate
+ * that the host has finished processing the entries. The @arm parameter
+ * indicates that the queue should be rearmed when ringing the doorbell.
+ *
+ * This function will return the number of CQEs that were released.
+ **/
+uint32_t
+lpfc_sli4_cq_release(struct lpfc_queue *q, bool arm)
+{
+	uint32_t released = 0;
+	struct lpfc_cqe *temp_qe;
+	struct lpfc_register doorbell;
+
+	/* while there are valid entries */
+	while (q->hba_index != q->host_index) {
+		temp_qe = q->qe[q->host_index].cqe;
+		bf_set(lpfc_cqe_valid, temp_qe, 0);
+		released++;
+		q->host_index = ((q->host_index + 1) % q->entry_count);
+	}
+	if (unlikely(released == 0 && !arm))
+		return 0;
+
+	/* ring doorbell for number popped */
+	doorbell.word0 = 0;
+	if (arm)
+		bf_set(lpfc_eqcq_doorbell_arm, &doorbell, 1);
+	bf_set(lpfc_eqcq_doorbell_num_released, &doorbell, released);
+	bf_set(lpfc_eqcq_doorbell_qt, &doorbell, LPFC_QUEUE_TYPE_COMPLETION);
+	bf_set(lpfc_eqcq_doorbell_cqid, &doorbell, q->queue_id);
+	writel(doorbell.word0, q->phba->sli4_hba.EQCQDBregaddr);
+	return released;
+}
+
+/**
+ * lpfc_sli4_rq_put - Put a Receive Buffer Queue Entry on a Receive Queue
+ * @q: The Header Receive Queue to operate on.
+ * @wqe: The Receive Queue Entry to put on the Receive queue.
+ *
+ * This routine will copy the contents of @wqe to the next available entry on
+ * the @q. This function will then ring the Receive Queue Doorbell to signal the
+ * HBA to start processing the Receive Queue Entry. This function returns the
+ * index that the rqe was copied to if successful. If no entries are available
+ * on @q then this function will return -ENOMEM.
+ * The caller is expected to hold the hbalock when calling this routine.
+ **/
+static int
+lpfc_sli4_rq_put(struct lpfc_queue *hq, struct lpfc_queue *dq,
+		 struct lpfc_rqe *hrqe, struct lpfc_rqe *drqe)
+{
+	struct lpfc_rqe *temp_hrqe = hq->qe[hq->host_index].rqe;
+	struct lpfc_rqe *temp_drqe = dq->qe[dq->host_index].rqe;
+	struct lpfc_register doorbell;
+	int put_index = hq->host_index;
+
+	if (hq->type != LPFC_HRQ || dq->type != LPFC_DRQ)
+		return -EINVAL;
+	if (hq->host_index != dq->host_index)
+		return -EINVAL;
+	/* If the host has not yet processed the next entry then we are done */
+	if (((hq->host_index + 1) % hq->entry_count) == hq->hba_index)
+		return -EBUSY;
+	lpfc_sli_pcimem_bcopy(hrqe, temp_hrqe, hq->entry_size);
+	lpfc_sli_pcimem_bcopy(drqe, temp_drqe, dq->entry_size);
+
+	/* Update the host index to point to the next slot */
+	hq->host_index = ((hq->host_index + 1) % hq->entry_count);
+	dq->host_index = ((dq->host_index + 1) % dq->entry_count);
+
+	/* Ring The Header Receive Queue Doorbell */
+	if (!(hq->host_index % LPFC_RQ_POST_BATCH)) {
+		doorbell.word0 = 0;
+		bf_set(lpfc_rq_doorbell_num_posted, &doorbell,
+		       LPFC_RQ_POST_BATCH);
+		bf_set(lpfc_rq_doorbell_id, &doorbell, hq->queue_id);
+		writel(doorbell.word0, hq->phba->sli4_hba.RQDBregaddr);
+	}
+	return put_index;
+}
+
+/**
+ * lpfc_sli4_rq_release - Updates internal hba index for RQ
+ * @q: The Header Receive Queue to operate on.
+ *
+ * This routine will update the HBA index of a queue to reflect consumption of
+ * one Receive Queue Entry by the HBA. When the HBA indicates that it has
+ * consumed an entry the host calls this function to update the queue's
+ * internal pointers. This routine returns the number of entries that were
+ * consumed by the HBA.
+ **/
+static uint32_t
+lpfc_sli4_rq_release(struct lpfc_queue *hq, struct lpfc_queue *dq)
+{
+	if ((hq->type != LPFC_HRQ) || (dq->type != LPFC_DRQ))
+		return 0;
+	hq->hba_index = ((hq->hba_index + 1) % hq->entry_count);
+	dq->hba_index = ((dq->hba_index + 1) % dq->entry_count);
+	return 1;
+}
+
 /**
  * lpfc_cmd_iocb - Get next command iocb entry in the ring
  * @phba: Pointer to HBA context object.
@@ -215,6 +559,59 @@ lpfc_sli_get_iocbq(struct lpfc_hba *phba)
 }
 
 /**
+ * __lpfc_sli_release_iocbq_s4 - Release iocb to the iocb pool
+ * @phba: Pointer to HBA context object.
+ * @iocbq: Pointer to driver iocb object.
+ *
+ * This function is called with hbalock held to release driver
+ * iocb object to the iocb pool. The iotag in the iocb object
+ * does not change for each use of the iocb object. This function
+ * clears all other fields of the iocb object when it is freed.
+ * The sqlq structure that holds the xritag and phys and virtual
+ * mappings for the scatter gather list is retrieved from the
+ * active array of sglq. The get of the sglq pointer also clears
+ * the entry in the array. If the status of the IO indiactes that
+ * this IO was aborted then the sglq entry it put on the
+ * lpfc_abts_els_sgl_list until the CQ_ABORTED_XRI is received. If the
+ * IO has good status or fails for any other reason then the sglq
+ * entry is added to the free list (lpfc_sgl_list).
+ **/
+static void
+__lpfc_sli_release_iocbq_s4(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
+{
+	struct lpfc_sglq *sglq;
+	size_t start_clean = offsetof(struct lpfc_iocbq, iocb);
+	unsigned long iflag;
+
+	if (iocbq->sli4_xritag == NO_XRI)
+		sglq = NULL;
+	else
+		sglq = __lpfc_clear_active_sglq(phba, iocbq->sli4_xritag);
+	if (sglq)  {
+		if (iocbq->iocb_flag & LPFC_DRIVER_ABORTED
+			|| ((iocbq->iocb.ulpStatus == IOSTAT_LOCAL_REJECT)
+			&& (iocbq->iocb.un.ulpWord[4]
+				== IOERR_SLI_ABORTED))) {
+			spin_lock_irqsave(&phba->sli4_hba.abts_sgl_list_lock,
+					iflag);
+			list_add(&sglq->list,
+				&phba->sli4_hba.lpfc_abts_els_sgl_list);
+			spin_unlock_irqrestore(
+				&phba->sli4_hba.abts_sgl_list_lock, iflag);
+		} else
+			list_add(&sglq->list, &phba->sli4_hba.lpfc_sgl_list);
+	}
+
+
+	/*
+	 * Clean all volatile data fields, preserve iotag and node struct.
+	 */
+	memset((char *)iocbq + start_clean, 0, sizeof(*iocbq) - start_clean);
+	iocbq->sli4_xritag = NO_XRI;
+	list_add_tail(&iocbq->list, &phba->lpfc_iocb_list);
+}
+
+/**
  * __lpfc_sli_release_iocbq_s3 - Release iocb to the iocb pool
  * @phba: Pointer to HBA context object.
  * @iocbq: Pointer to driver iocb object.
@@ -959,6 +1356,37 @@ lpfc_sli_hbq_to_firmware_s3(struct lpfc_hba *phba, uint32_t hbqno,
 		return -ENOMEM;
 }
 
+/**
+ * lpfc_sli_hbq_to_firmware_s4 - Post the hbq buffer to SLI4 firmware
+ * @phba: Pointer to HBA context object.
+ * @hbqno: HBQ number.
+ * @hbq_buf: Pointer to HBQ buffer.
+ *
+ * This function is called with the hbalock held to post an RQE to the SLI4
+ * firmware. If able to post the RQE to the RQ it will queue the hbq entry to
+ * the hbq_buffer_list and return zero, otherwise it will return an error.
+ **/
+static int
+lpfc_sli_hbq_to_firmware_s4(struct lpfc_hba *phba, uint32_t hbqno,
+			    struct hbq_dmabuf *hbq_buf)
+{
+	int rc;
+	struct lpfc_rqe hrqe;
+	struct lpfc_rqe drqe;
+
+	hrqe.address_lo = putPaddrLow(hbq_buf->hbuf.phys);
+	hrqe.address_hi = putPaddrHigh(hbq_buf->hbuf.phys);
+	drqe.address_lo = putPaddrLow(hbq_buf->dbuf.phys);
+	drqe.address_hi = putPaddrHigh(hbq_buf->dbuf.phys);
+	rc = lpfc_sli4_rq_put(phba->sli4_hba.hdr_rq, phba->sli4_hba.dat_rq,
+			      &hrqe, &drqe);
+	if (rc < 0)
+		return rc;
+	hbq_buf->tag = rc;
+	list_add_tail(&hbq_buf->dbuf.list, &phba->hbqs[hbqno].hbq_buffer_list);
+	return 0;
+}
+
 /* HBQ for ELS and CT traffic. */
 static struct lpfc_hbq_init lpfc_els_hbq = {
 	.rn = 1,
@@ -2575,6 +3003,36 @@ lpfc_sli_handle_slow_ring_event_s3(struct lpfc_hba *phba,
 }
 
 /**
+ * lpfc_sli_handle_slow_ring_event_s4 - Handle SLI4 slow-path els events
+ * @phba: Pointer to HBA context object.
+ * @pring: Pointer to driver SLI ring object.
+ * @mask: Host attention register mask for this ring.
+ *
+ * This function is called from the worker thread when there is a pending
+ * ELS response iocb on the driver internal slow-path response iocb worker
+ * queue. The caller does not hold any lock. The function will remove each
+ * response iocb from the response worker queue and calls the handle
+ * response iocb routine (lpfc_sli_sp_handle_rspiocb) to process it.
+ **/
+static void
+lpfc_sli_handle_slow_ring_event_s4(struct lpfc_hba *phba,
+				   struct lpfc_sli_ring *pring, uint32_t mask)
+{
+	struct lpfc_iocbq *irspiocbq;
+	unsigned long iflag;
+
+	while (!list_empty(&phba->sli4_hba.sp_rspiocb_work_queue)) {
+		/* Get the response iocb from the head of work queue */
+		spin_lock_irqsave(&phba->hbalock, iflag);
+		list_remove_head(&phba->sli4_hba.sp_rspiocb_work_queue,
+				 irspiocbq, struct lpfc_iocbq, list);
+		spin_unlock_irqrestore(&phba->hbalock, iflag);
+		/* Process the response iocb */
+		lpfc_sli_sp_handle_rspiocb(phba, pring, irspiocbq);
+	}
+}
+
+/**
  * lpfc_sli_abort_iocb_ring - Abort all iocbs in the ring
  * @phba: Pointer to HBA context object.
  * @pring: Pointer to driver SLI ring object.
@@ -3376,6 +3834,26 @@ lpfc_sli_hbq_setup(struct lpfc_hba *phba)
 }
 
 /**
+ * lpfc_sli4_rb_setup - Initialize and post RBs to HBA
+ * @phba: Pointer to HBA context object.
+ *
+ * This function is called during the SLI initialization to configure
+ * all the HBQs and post buffers to the HBQ. The caller is not
+ * required to hold any locks. This function will return zero if successful
+ * else it will return negative error code.
+ **/
+static int
+lpfc_sli4_rb_setup(struct lpfc_hba *phba)
+{
+	phba->hbq_in_use = 1;
+	phba->hbqs[0].entry_count = lpfc_hbq_defs[0]->entry_count;
+	phba->hbq_count = 1;
+	/* Initially populate or replenish the HBQs */
+	lpfc_sli_hbqbuf_init_hbqs(phba, 0);
+	return 0;
+}
+
+/**
  * lpfc_sli_config_port - Issue config port mailbox command
  * @phba: Pointer to HBA context object.
  * @sli_mode: sli mode - 2/3
@@ -5130,6 +5608,448 @@ __lpfc_sli_issue_iocb_s3(struct lpfc_hba *phba, uint32_t ring_number,
 }
 
 /**
+ * lpfc_sli4_bpl2sgl - Convert the bpl/bde to a sgl.
+ * @phba: Pointer to HBA context object.
+ * @piocb: Pointer to command iocb.
+ * @sglq: Pointer to the scatter gather queue object.
+ *
+ * This routine converts the bpl or bde that is in the IOCB
+ * to a sgl list for the sli4 hardware. The physical address
+ * of the bpl/bde is converted back to a virtual address.
+ * If the IOCB contains a BPL then the list of BDE's is
+ * converted to sli4_sge's. If the IOCB contains a single
+ * BDE then it is converted to a single sli_sge.
+ * The IOCB is still in cpu endianess so the contents of
+ * the bpl can be used without byte swapping.
+ *
+ * Returns valid XRI = Success, NO_XRI = Failure.
+**/
+static uint16_t
+lpfc_sli4_bpl2sgl(struct lpfc_hba *phba, struct lpfc_iocbq *piocbq,
+		struct lpfc_sglq *sglq)
+{
+	uint16_t xritag = NO_XRI;
+	struct ulp_bde64 *bpl = NULL;
+	struct ulp_bde64 bde;
+	struct sli4_sge *sgl  = NULL;
+	IOCB_t *icmd;
+	int numBdes = 0;
+	int i = 0;
+
+	if (!piocbq || !sglq)
+		return xritag;
+
+	sgl  = (struct sli4_sge *)sglq->sgl;
+	icmd = &piocbq->iocb;
+	if (icmd->un.genreq64.bdl.bdeFlags == BUFF_TYPE_BLP_64) {
+		numBdes = icmd->un.genreq64.bdl.bdeSize /
+				sizeof(struct ulp_bde64);
+		/* The addrHigh and addrLow fields within the IOCB
+		 * have not been byteswapped yet so there is no
+		 * need to swap them back.
+		 */
+		bpl  = (struct ulp_bde64 *)
+			((struct lpfc_dmabuf *)piocbq->context3)->virt;
+
+		if (!bpl)
+			return xritag;
+
+		for (i = 0; i < numBdes; i++) {
+			/* Should already be byte swapped. */
+			sgl->addr_hi =  bpl->addrHigh;
+			sgl->addr_lo =  bpl->addrLow;
+			/* swap the size field back to the cpu so we
+			 * can assign it to the sgl.
+			 */
+			bde.tus.w  = le32_to_cpu(bpl->tus.w);
+			bf_set(lpfc_sli4_sge_len, sgl, bde.tus.f.bdeSize);
+			if ((i+1) == numBdes)
+				bf_set(lpfc_sli4_sge_last, sgl, 1);
+			else
+				bf_set(lpfc_sli4_sge_last, sgl, 0);
+			sgl->word2 = cpu_to_le32(sgl->word2);
+			sgl->word3 = cpu_to_le32(sgl->word3);
+			bpl++;
+			sgl++;
+		}
+	} else if (icmd->un.genreq64.bdl.bdeFlags == BUFF_TYPE_BDE_64) {
+			/* The addrHigh and addrLow fields of the BDE have not
+			 * been byteswapped yet so they need to be swapped
+			 * before putting them in the sgl.
+			 */
+			sgl->addr_hi =
+				cpu_to_le32(icmd->un.genreq64.bdl.addrHigh);
+			sgl->addr_lo =
+				cpu_to_le32(icmd->un.genreq64.bdl.addrLow);
+			bf_set(lpfc_sli4_sge_len, sgl,
+				icmd->un.genreq64.bdl.bdeSize);
+			bf_set(lpfc_sli4_sge_last, sgl, 1);
+			sgl->word2 = cpu_to_le32(sgl->word2);
+			sgl->word3 = cpu_to_le32(sgl->word3);
+	}
+	return sglq->sli4_xritag;
+}
+
+/**
+ * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
+ * @phba: Pointer to HBA context object.
+ * @piocb: Pointer to command iocb.
+ *
+ * This routine performs a round robin SCSI command to SLI4 FCP WQ index
+ * distribution.
+ *
+ * Return: index into SLI4 fast-path FCP queue index.
+ **/
+static uint32_t
+lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba, struct lpfc_iocbq *piocb)
+{
+	static uint32_t fcp_qidx;
+
+	return fcp_qidx++ % phba->cfg_fcp_wq_count;
+}
+
+/**
+ * lpfc_sli_iocb2wqe - Convert the IOCB to a work queue entry.
+ * @phba: Pointer to HBA context object.
+ * @piocb: Pointer to command iocb.
+ * @wqe: Pointer to the work queue entry.
+ *
+ * This routine converts the iocb command to its Work Queue Entry
+ * equivalent. The wqe pointer should not have any fields set when
+ * this routine is called because it will memcpy over them.
+ * This routine does not set the CQ_ID or the WQEC bits in the
+ * wqe.
+ *
+ * Returns: 0 = Success, IOCB_ERROR = Failure.
+ **/
+static int
+lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
+		union lpfc_wqe *wqe)
+{
+	uint32_t payload_len = 0;
+	uint8_t ct = 0;
+	uint32_t fip;
+	uint32_t abort_tag;
+	uint8_t command_type = ELS_COMMAND_NON_FIP;
+	uint8_t cmnd;
+	uint16_t xritag;
+	struct ulp_bde64 *bpl = NULL;
+
+	fip = bf_get(lpfc_fip_flag, &phba->sli4_hba.sli4_flags);
+	/* The fcp commands will set command type */
+	if ((!(iocbq->iocb_flag &  LPFC_IO_FCP)) && (!fip))
+		command_type = ELS_COMMAND_NON_FIP;
+	else if (!(iocbq->iocb_flag &  LPFC_IO_FCP))
+		command_type = ELS_COMMAND_FIP;
+	else if (iocbq->iocb_flag &  LPFC_IO_FCP)
+		command_type = FCP_COMMAND;
+	else {
+		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+			"2019 Invalid cmd 0x%x\n",
+			iocbq->iocb.ulpCommand);
+		return IOCB_ERROR;
+	}
+	/* Some of the fields are in the right position already */
+	memcpy(wqe, &iocbq->iocb, sizeof(union lpfc_wqe));
+	abort_tag = (uint32_t) iocbq->iotag;
+	xritag = iocbq->sli4_xritag;
+	wqe->words[7] = 0; /* The ct field has moved so reset */
+	/* words0-2 bpl convert bde */
+	if (iocbq->iocb.un.genreq64.bdl.bdeFlags == BUFF_TYPE_BLP_64) {
+		bpl  = (struct ulp_bde64 *)
+			((struct lpfc_dmabuf *)iocbq->context3)->virt;
+		if (!bpl)
+			return IOCB_ERROR;
+
+		/* Should already be byte swapped. */
+		wqe->generic.bde.addrHigh =  le32_to_cpu(bpl->addrHigh);
+		wqe->generic.bde.addrLow =  le32_to_cpu(bpl->addrLow);
+		/* swap the size field back to the cpu so we
+		 * can assign it to the sgl.
+		 */
+		wqe->generic.bde.tus.w  = le32_to_cpu(bpl->tus.w);
+		payload_len = wqe->generic.bde.tus.f.bdeSize;
+	} else
+		payload_len = iocbq->iocb.un.fcpi64.bdl.bdeSize;
+
+	iocbq->iocb.ulpIoTag = iocbq->iotag;
+	cmnd = iocbq->iocb.ulpCommand;
+
+	switch (iocbq->iocb.ulpCommand) {
+	case CMD_ELS_REQUEST64_CR:
+		if (!iocbq->iocb.ulpLe) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+				"2007 Only Limited Edition cmd Format"
+				" supported 0x%x\n",
+				iocbq->iocb.ulpCommand);
+			return IOCB_ERROR;
+		}
+		wqe->els_req.payload_len = payload_len;
+		/* Els_reguest64 has a TMO */
+		bf_set(wqe_tmo, &wqe->els_req.wqe_com,
+			iocbq->iocb.ulpTimeout);
+		/* Need a VF for word 4 set the vf bit*/
+		bf_set(els_req64_vf, &wqe->els_req, 0);
+		/* And a VFID for word 12 */
+		bf_set(els_req64_vfid, &wqe->els_req, 0);
+		/*
+		 * Set ct field to 3, indicates that the context_tag field
+		 * contains the FCFI and remote N_Port_ID is
+		 * in word 5.
+		 */
+
+		ct = ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l);
+		bf_set(lpfc_wqe_gen_context, &wqe->generic,
+				iocbq->iocb.ulpContext);
+
+		if (iocbq->vport->fc_myDID != 0) {
+			bf_set(els_req64_sid, &wqe->els_req,
+				 iocbq->vport->fc_myDID);
+			bf_set(els_req64_sp, &wqe->els_req, 1);
+		}
+		bf_set(lpfc_wqe_gen_ct, &wqe->generic, ct);
+		bf_set(lpfc_wqe_gen_pu, &wqe->generic, 0);
+		/* CCP CCPE PV PRI in word10 were set in the memcpy */
+	break;
+	case CMD_XMIT_SEQUENCE64_CR:
+		/* word3 iocb=io_tag32 wqe=payload_offset */
+		/* payload offset used for multilpe outstanding
+		 * sequences on the same exchange
+		 */
+		wqe->words[3] = 0;
+		/* word4 relative_offset memcpy */
+		/* word5 r_ctl/df_ctl memcpy */
+		bf_set(lpfc_wqe_gen_pu, &wqe->generic, 0);
+		wqe->xmit_sequence.xmit_len = payload_len;
+	break;
+	case CMD_XMIT_BCAST64_CN:
+		/* word3 iocb=iotag32 wqe=payload_len */
+		wqe->words[3] = 0; /* no definition for this in wqe */
+		/* word4 iocb=rsvd wqe=rsvd */
+		/* word5 iocb=rctl/type/df_ctl wqe=rctl/type/df_ctl memcpy */
+		/* word6 iocb=ctxt_tag/io_tag wqe=ctxt_tag/xri */
+		bf_set(lpfc_wqe_gen_ct, &wqe->generic,
+			((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l));
+	break;
+	case CMD_FCP_IWRITE64_CR:
+		command_type = FCP_COMMAND_DATA_OUT;
+		/* The struct for wqe fcp_iwrite has 3 fields that are somewhat
+		 * confusing.
+		 * word3 is payload_len: byte offset to the sgl entry for the
+		 * fcp_command.
+		 * word4 is total xfer len, same as the IOCB->ulpParameter.
+		 * word5 is initial xfer len 0 = wait for xfer-ready
+		 */
+
+		/* Always wait for xfer-ready before sending data */
+		wqe->fcp_iwrite.initial_xfer_len = 0;
+		/* word 4 (xfer length) should have been set on the memcpy */
+
+	/* allow write to fall through to read */
+	case CMD_FCP_IREAD64_CR:
+		/* FCP_CMD is always the 1st sgl entry */
+		wqe->fcp_iread.payload_len =
+			payload_len + sizeof(struct fcp_rsp);
+
+		/* word 4 (xfer length) should have been set on the memcpy */
+
+		bf_set(lpfc_wqe_gen_erp, &wqe->generic,
+			iocbq->iocb.ulpFCP2Rcvy);
+		bf_set(lpfc_wqe_gen_lnk, &wqe->generic, iocbq->iocb.ulpXS);
+		/* The XC bit and the XS bit are similar. The driver never
+		 * tracked whether or not the exchange was previouslly open.
+		 * XC = Exchange create, 0 is create. 1 is already open.
+		 * XS = link cmd: 1 do not close the exchange after command.
+		 * XS = 0 close exchange when command completes.
+		 * The only time we would not set the XC bit is when the XS bit
+		 * is set and we are sending our 2nd or greater command on
+		 * this exchange.
+		 */
+
+	/* ALLOW read & write to fall through to ICMD64 */
+	case CMD_FCP_ICMND64_CR:
+		/* Always open the exchange */
+		bf_set(wqe_xc, &wqe->fcp_iread.wqe_com, 0);
+
+		wqe->words[10] &= 0xffff0000; /* zero out ebde count */
+		bf_set(lpfc_wqe_gen_pu, &wqe->generic, iocbq->iocb.ulpPU);
+	break;
+	case CMD_GEN_REQUEST64_CR:
+		/* word3 command length is described as byte offset to the
+		 * rsp_data. Would always be 16, sizeof(struct sli4_sge)
+		 * sgl[0] = cmnd
+		 * sgl[1] = rsp.
+		 *
+		 */
+		wqe->gen_req.command_len = payload_len;
+		/* Word4 parameter  copied in the memcpy */
+		/* Word5 [rctl, type, df_ctl, la] copied in memcpy */
+		/* word6 context tag copied in memcpy */
+		if (iocbq->iocb.ulpCt_h  || iocbq->iocb.ulpCt_l) {
+			ct = ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l);
+			lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+				"2015 Invalid CT %x command 0x%x\n",
+				ct, iocbq->iocb.ulpCommand);
+			return IOCB_ERROR;
+		}
+		bf_set(lpfc_wqe_gen_ct, &wqe->generic, 0);
+		bf_set(wqe_tmo, &wqe->gen_req.wqe_com,
+			iocbq->iocb.ulpTimeout);
+
+		bf_set(lpfc_wqe_gen_pu, &wqe->generic, iocbq->iocb.ulpPU);
+		command_type = OTHER_COMMAND;
+	break;
+	case CMD_XMIT_ELS_RSP64_CX:
+		/* words0-2 BDE memcpy */
+		/* word3 iocb=iotag32 wqe=rsvd */
+		wqe->words[3] = 0;
+		/* word4 iocb=did wge=rsvd. */
+		wqe->words[4] = 0;
+		/* word5 iocb=rsvd wge=did */
+		bf_set(wqe_els_did, &wqe->xmit_els_rsp.wqe_dest,
+			 iocbq->iocb.un.elsreq64.remoteID);
+
+		bf_set(lpfc_wqe_gen_ct, &wqe->generic,
+			((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l));
+
+		bf_set(lpfc_wqe_gen_pu, &wqe->generic, iocbq->iocb.ulpPU);
+		bf_set(wqe_rcvoxid, &wqe->generic, iocbq->iocb.ulpContext);
+		if (!iocbq->iocb.ulpCt_h && iocbq->iocb.ulpCt_l)
+			bf_set(lpfc_wqe_gen_context, &wqe->generic,
+			       iocbq->vport->vpi + phba->vpi_base);
+		command_type = OTHER_COMMAND;
+	break;
+	case CMD_CLOSE_XRI_CN:
+	case CMD_ABORT_XRI_CN:
+	case CMD_ABORT_XRI_CX:
+		/* words 0-2 memcpy should be 0 rserved */
+		/* port will send abts */
+		if (iocbq->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
+			/*
+			 * The link is down so the fw does not need to send abts
+			 * on the wire.
+			 */
+			bf_set(abort_cmd_ia, &wqe->abort_cmd, 1);
+		else
+			bf_set(abort_cmd_ia, &wqe->abort_cmd, 0);
+		bf_set(abort_cmd_criteria, &wqe->abort_cmd, T_XRI_TAG);
+		abort_tag = iocbq->iocb.un.acxri.abortIoTag;
+		wqe->words[5] = 0;
+		bf_set(lpfc_wqe_gen_ct, &wqe->generic,
+			((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l));
+		abort_tag = iocbq->iocb.un.acxri.abortIoTag;
+		wqe->generic.abort_tag = abort_tag;
+		/*
+		 * The abort handler will send us CMD_ABORT_XRI_CN or
+		 * CMD_CLOSE_XRI_CN and the fw only accepts CMD_ABORT_XRI_CX
+		 */
+		bf_set(lpfc_wqe_gen_command, &wqe->generic, CMD_ABORT_XRI_CX);
+		cmnd = CMD_ABORT_XRI_CX;
+		command_type = OTHER_COMMAND;
+		xritag = 0;
+	break;
+	case CMD_XRI_ABORTED_CX:
+	case CMD_CREATE_XRI_CR: /* Do we expect to use this? */
+		/* words0-2 are all 0's no bde */
+		/* word3 and word4 are rsvrd */
+		wqe->words[3] = 0;
+		wqe->words[4] = 0;
+		/* word5 iocb=rsvd wge=did */
+		/* There is no remote port id in the IOCB? */
+		/* Let this fall through and fail */
+	case CMD_IOCB_FCP_IBIDIR64_CR: /* bidirectional xfer */
+	case CMD_FCP_TSEND64_CX: /* Target mode send xfer-ready */
+	case CMD_FCP_TRSP64_CX: /* Target mode rcv */
+	case CMD_FCP_AUTO_TRSP_CX: /* Auto target rsp */
+	default:
+		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+				"2014 Invalid command 0x%x\n",
+				iocbq->iocb.ulpCommand);
+		return IOCB_ERROR;
+	break;
+
+	}
+	bf_set(lpfc_wqe_gen_xri, &wqe->generic, xritag);
+	bf_set(lpfc_wqe_gen_request_tag, &wqe->generic, iocbq->iotag);
+	wqe->generic.abort_tag = abort_tag;
+	bf_set(lpfc_wqe_gen_cmd_type, &wqe->generic, command_type);
+	bf_set(lpfc_wqe_gen_command, &wqe->generic, cmnd);
+	bf_set(lpfc_wqe_gen_class, &wqe->generic, iocbq->iocb.ulpClass);
+	bf_set(lpfc_wqe_gen_cq_id, &wqe->generic, LPFC_WQE_CQ_ID_DEFAULT);
+
+	return 0;
+}
+
+/**
+ * __lpfc_sli_issue_iocb_s4 - SLI4 device lockless ver of lpfc_sli_issue_iocb
+ * @phba: Pointer to HBA context object.
+ * @ring_number: SLI ring number to issue iocb on.
+ * @piocb: Pointer to command iocb.
+ * @flag: Flag indicating if this command can be put into txq.
+ *
+ * __lpfc_sli_issue_iocb_s4 is used by other functions in the driver to issue
+ * an iocb command to an HBA with SLI-4 interface spec.
+ *
+ * This function is called with hbalock held. The function will return success
+ * after it successfully submit the iocb to firmware or after adding to the
+ * txq.
+ **/
+static int
+__lpfc_sli_issue_iocb_s4(struct lpfc_hba *phba, uint32_t ring_number,
+			 struct lpfc_iocbq *piocb, uint32_t flag)
+{
+	struct lpfc_sglq *sglq;
+	uint16_t xritag;
+	union lpfc_wqe wqe;
+	struct lpfc_sli_ring *pring = &phba->sli.ring[ring_number];
+	uint32_t fcp_wqidx;
+
+	if (piocb->sli4_xritag == NO_XRI) {
+		if (piocb->iocb.ulpCommand == CMD_ABORT_XRI_CN ||
+			piocb->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
+			sglq = NULL;
+		else {
+			sglq = __lpfc_sli_get_sglq(phba);
+			if (!sglq)
+				return IOCB_ERROR;
+			piocb->sli4_xritag = sglq->sli4_xritag;
+		}
+	} else if (piocb->iocb_flag &  LPFC_IO_FCP) {
+		sglq = NULL; /* These IO's already have an XRI and
+			      * a mapped sgl.
+			      */
+	} else {
+		/* This is a continuation of a commandi,(CX) so this
+		 * sglq is on the active list
+		 */
+		sglq = __lpfc_get_active_sglq(phba, piocb->sli4_xritag);
+		if (!sglq)
+			return IOCB_ERROR;
+	}
+
+	if (sglq) {
+		xritag = lpfc_sli4_bpl2sgl(phba, piocb, sglq);
+		if (xritag != sglq->sli4_xritag)
+			return IOCB_ERROR;
+	}
+
+	if (lpfc_sli4_iocb2wqe(phba, piocb, &wqe))
+		return IOCB_ERROR;
+
+	if (piocb->iocb_flag &  LPFC_IO_FCP) {
+		fcp_wqidx = lpfc_sli4_scmd_to_wqidx_distr(phba, piocb);
+		if (lpfc_sli4_wq_put(phba->sli4_hba.fcp_wq[fcp_wqidx], &wqe))
+			return IOCB_ERROR;
+	} else {
+		if (lpfc_sli4_wq_put(phba->sli4_hba.els_wq, &wqe))
+			return IOCB_ERROR;
+	}
+	lpfc_sli_ringtxcmpl_put(phba, pring, piocb);
+
+	return 0;
+}
+
+/**
  * __lpfc_sli_issue_iocb - Wrapper func of lockless version for issuing iocb
  *
  * This routine wraps the actual lockless version for issusing IOCB function
@@ -5165,6 +6085,10 @@ lpfc_sli_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 		phba->__lpfc_sli_issue_iocb = __lpfc_sli_issue_iocb_s3;
 		phba->__lpfc_sli_release_iocbq = __lpfc_sli_release_iocbq_s3;
 		break;
+	case LPFC_PCI_DEV_OC:
+		phba->__lpfc_sli_issue_iocb = __lpfc_sli_issue_iocb_s4;
+		phba->__lpfc_sli_release_iocbq = __lpfc_sli_release_iocbq_s4;
+		break;
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 				"1419 Invalid HBA PCI-device group: 0x%x\n",
@@ -7152,3 +8076,2461 @@ lpfc_sli_intr_handler(int irq, void *dev_id)
 	/* Return device-level interrupt handling status */
 	return (sp_irq_rc == IRQ_HANDLED) ? sp_irq_rc : fp_irq_rc;
 }  /* lpfc_sli_intr_handler */
+
+/**
+ * lpfc_sli4_fcp_xri_abort_event_proc - Process fcp xri abort event
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is invoked by the worker thread to process all the pending
+ * SLI4 FCP abort XRI events.
+ **/
+void lpfc_sli4_fcp_xr