Commit 1151e3ec authored by James Smart's avatar James Smart Committed by James Bottomley
Browse files

[SCSI] lpfc 8.3.21: RRQ Implementation fixes 



RRQ Implementation fixes

- Added checks to prevent a call to findnode_did in clr_active_rrq
- Added the del_sync_timer call for the rrq_tmr to the stop_hba_timers routine.
- Added a check in __lpfc_set_active_rrq for the driver unloading to prevent
  adding an rrq when the driver is being removed.
- Add code to scsi_iocb_cmpl to check for the remote stop and add the rrq.
- Added the same check to els retry.
- Added code to compare the source did in the els rrq to the vports did and
  chose the right exchange ID.
- Initialize the start_cmd pointer to indicate when we have looped through
  all of the scsi buffers.
- Remove the need for the lock around the clearing of the active bit in the
  rrq.
- Added code to clean the els and fcp xri aborted list and remove the all of
  the RRQs for a deleted vport.

Signed-off-by: default avatarAlex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: default avatarJames Smart <james.smart@emulex.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent fedd3b7b

drivers/scsi/lpfc/lpfc_crtn.h

+1 −1
Original line number Diff line number Diff line
@@ -423,6 +423,6 @@ int lpfc_send_rrq(struct lpfc_hba *, struct lpfc_node_rrq *); 
int lpfc_set_rrq_active(struct lpfc_hba *, struct lpfc_nodelist *,

	uint16_t, uint16_t, uint16_t);

void lpfc_cleanup_wt_rrqs(struct lpfc_hba *);

void lpfc_cleanup_vports_rrqs(struct lpfc_vport *);

void lpfc_cleanup_vports_rrqs(struct lpfc_vport *, struct lpfc_nodelist *);

struct lpfc_node_rrq *lpfc_get_active_rrq(struct lpfc_vport *, uint16_t,

	uint32_t);

drivers/scsi/lpfc/lpfc_els.c

+46 −6
Original line number Diff line number Diff line
@@ -2816,9 +2816,17 @@ lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, 


	switch (irsp->ulpStatus) {

	case IOSTAT_FCP_RSP_ERROR:

		break;

	case IOSTAT_REMOTE_STOP:

		if (phba->sli_rev == LPFC_SLI_REV4) {

			/* This IO was aborted by the target, we don't

			 * know the rxid and because we did not send the

			 * ABTS we cannot generate and RRQ.

			 */

			lpfc_set_rrq_active(phba, ndlp,

					 cmdiocb->sli4_xritag, 0, 0);

		}

		break;



	case IOSTAT_LOCAL_REJECT:

		switch ((irsp->un.ulpWord[4] & 0xff)) {

		case IOERR_LOOP_OPEN_FAILURE:
@@ -4014,28 +4022,34 @@ lpfc_els_clear_rrq(struct lpfc_vport *vport, 
	uint8_t *pcmd;

	struct RRQ *rrq;

	uint16_t rxid;

	uint16_t xri;

	struct lpfc_node_rrq *prrq;





	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) iocb->context2)->virt);

	pcmd += sizeof(uint32_t);

	rrq = (struct RRQ *)pcmd;

	rxid = bf_get(rrq_oxid, rrq);

	rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);

	rxid = be16_to_cpu(bf_get(rrq_rxid, rrq));



	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,

			"2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"

			" x%x x%x\n",

			bf_get(rrq_did, rrq),

			bf_get(rrq_oxid, rrq),

			be32_to_cpu(bf_get(rrq_did, rrq)),

			be16_to_cpu(bf_get(rrq_oxid, rrq)),

			rxid,

			iocb->iotag, iocb->iocb.ulpContext);



	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,

		"Clear RRQ:  did:x%x flg:x%x exchg:x%.08x",

		ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);

	prrq = lpfc_get_active_rrq(vport, rxid, ndlp->nlp_DID);

	if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))

		xri = be16_to_cpu(bf_get(rrq_oxid, rrq));

	else

		xri = rxid;

	prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);

	if (prrq)

		lpfc_clr_rrq_active(phba, rxid, prrq);

		lpfc_clr_rrq_active(phba, xri, prrq);

	return;

}
@@ -7582,6 +7596,32 @@ void lpfc_fabric_abort_hba(struct lpfc_hba *phba) 
			      IOERR_SLI_ABORTED);

}



/**

 * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport

 * @vport: pointer to lpfc vport data structure.

 *

 * This routine is invoked by the vport cleanup for deletions and the cleanup

 * for an ndlp on removal.

 **/

void

lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)

{

	struct lpfc_hba *phba = vport->phba;

	struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;

	unsigned long iflag = 0;



	spin_lock_irqsave(&phba->hbalock, iflag);

	spin_lock(&phba->sli4_hba.abts_sgl_list_lock);

	list_for_each_entry_safe(sglq_entry, sglq_next,

			&phba->sli4_hba.lpfc_abts_els_sgl_list, list) {

		if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport)

			sglq_entry->ndlp = NULL;

	}

	spin_unlock(&phba->sli4_hba.abts_sgl_list_lock);

	spin_unlock_irqrestore(&phba->hbalock, iflag);

	return;

}



/**

 * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort

 * @phba: pointer to lpfc hba data structure.

drivers/scsi/lpfc/lpfc_hbadisc.c

+4 −2
Original line number Diff line number Diff line
@@ -3160,7 +3160,7 @@ lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) 
	spin_unlock_irq(shost->host_lock);

	vport->unreg_vpi_cmpl = VPORT_OK;

	mempool_free(pmb, phba->mbox_mem_pool);

	lpfc_cleanup_vports_rrqs(vport);

	lpfc_cleanup_vports_rrqs(vport, NULL);

	/*

	 * This shost reference might have been taken at the beginning of

	 * lpfc_vport_delete()
@@ -3900,6 +3900,8 @@ lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) 
	if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)

		return;

	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);

	if (vport->phba->sli_rev == LPFC_SLI_REV4)

		lpfc_cleanup_vports_rrqs(vport, ndlp);

	lpfc_nlp_put(ndlp);

	return;

}
@@ -4289,7 +4291,7 @@ lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) 


	list_del_init(&ndlp->els_retry_evt.evt_listp);

	list_del_init(&ndlp->dev_loss_evt.evt_listp);



	lpfc_cleanup_vports_rrqs(vport, ndlp);

	lpfc_unreg_rpi(vport, ndlp);



	return 0;

drivers/scsi/lpfc/lpfc_init.c

+7 −6
Original line number Diff line number Diff line
@@ -945,16 +945,12 @@ 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);

}
@@ -2280,6 +2276,7 @@ lpfc_cleanup(struct lpfc_vport *vport) 
		/* Wait for any activity on ndlps to settle */

		msleep(10);

	}

	lpfc_cleanup_vports_rrqs(vport, NULL);

}



/**
@@ -2355,6 +2352,10 @@ lpfc_stop_hba_timers(struct lpfc_hba *phba) 
	del_timer_sync(&phba->fabric_block_timer);

	del_timer_sync(&phba->eratt_poll);

	del_timer_sync(&phba->hb_tmofunc);

	if (phba->sli_rev == LPFC_SLI_REV4) {

		del_timer_sync(&phba->rrq_tmr);

		phba->hba_flag &= ~HBA_RRQ_ACTIVE;

	}

	phba->hb_outstanding = 0;



	switch (phba->pci_dev_grp) {

drivers/scsi/lpfc/lpfc_scsi.c

+56 −21
Original line number Diff line number Diff line
@@ -608,6 +608,32 @@ lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 
	return bcnt;

}



/**

 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport

 * @vport: pointer to lpfc vport data structure.

 *

 * This routine is invoked by the vport cleanup for deletions and the cleanup

 * for an ndlp on removal.

 **/

void

lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)

{

	struct lpfc_hba *phba = vport->phba;

	struct lpfc_scsi_buf *psb, *next_psb;

	unsigned long iflag = 0;



	spin_lock_irqsave(&phba->hbalock, iflag);

	spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);

	list_for_each_entry_safe(psb, next_psb,

				&phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {

		if (psb->rdata && psb->rdata->pnode

			&& psb->rdata->pnode->vport == vport)

			psb->rdata = NULL;

	}

	spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);

	spin_unlock_irqrestore(&phba->hbalock, iflag);

}



/**

 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort

 * @phba: pointer to lpfc hba data structure.
@@ -640,7 +666,11 @@ lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 
			psb->status = IOSTAT_SUCCESS;

			spin_unlock(

				&phba->sli4_hba.abts_scsi_buf_list_lock);

			if (psb->rdata && psb->rdata->pnode)

				ndlp = psb->rdata->pnode;

			else

				ndlp = NULL;



			rrq_empty = list_empty(&phba->active_rrq_list);

			spin_unlock_irqrestore(&phba->hbalock, iflag);

			if (ndlp)
@@ -964,35 +994,28 @@ lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 
static struct lpfc_scsi_buf*

lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)

{

	struct  lpfc_scsi_buf *lpfc_cmd = NULL;

	struct  lpfc_scsi_buf *start_lpfc_cmd = NULL;

	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;

	struct lpfc_scsi_buf *lpfc_cmd ;

	unsigned long iflag = 0;

	int found = 0;



	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);

	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);

	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);

	while (!found && lpfc_cmd) {

	list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list,

							list) {

		if (lpfc_test_rrq_active(phba, ndlp,

					 lpfc_cmd->cur_iocbq.sli4_xritag)) {

			lpfc_release_scsi_buf_s4(phba, lpfc_cmd);

			spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);

			list_remove_head(scsi_buf_list, lpfc_cmd,

					 struct lpfc_scsi_buf, list);

			spin_unlock_irqrestore(&phba->scsi_buf_list_lock,

						 iflag);

			if (lpfc_cmd == start_lpfc_cmd) {

				lpfc_cmd = NULL;

				break;

			} else

					 lpfc_cmd->cur_iocbq.sli4_xritag))

			continue;

		}

		list_del(&lpfc_cmd->list);

		found = 1;

		lpfc_cmd->seg_cnt = 0;

		lpfc_cmd->nonsg_phys = 0;

		lpfc_cmd->prot_seg_cnt = 0;

		break;

	}

	spin_unlock_irqrestore(&phba->scsi_buf_list_lock,

						 iflag);

	if (!found)

		return NULL;

	else

		return  lpfc_cmd;

}

/**
@@ -2484,6 +2507,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 
			lpfc_worker_wake_up(phba);

			break;

		case IOSTAT_LOCAL_REJECT:

		case IOSTAT_REMOTE_STOP:

			if (lpfc_cmd->result == IOERR_INVALID_RPI ||

			    lpfc_cmd->result == IOERR_NO_RESOURCES ||

			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
@@ -2510,6 +2534,17 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 
							"on unprotected cmd\n");

				}

			}

			if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)

				&& (phba->sli_rev == LPFC_SLI_REV4)

				&& (pnode && NLP_CHK_NODE_ACT(pnode))) {

				/* This IO was aborted by the target, we don't

				 * know the rxid and because we did not send the

				 * ABTS we cannot generate and RRQ.

				 */

				lpfc_set_rrq_active(phba, pnode,

						lpfc_cmd->cur_iocbq.sli4_xritag,

						0, 0);

			}



		/* else: fall through */

		default:

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