[SCSI] lpfc 8.1.2: Handling of ELS commands RRQ, RPS, RPL and LIRR correctly

Handling of ELS commands RRQ, RPS, RPL and LIRR correctly

Signed-off-by: Jamie Wellnitz <Jamie.Wellnitz@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 248 insertions, 26 deletions

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 20f1a0713db2..9c9e7661de59 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -2654,41 +2654,243 @@ lpfc_els_rcv_rnid(struct lpfc_hba * phba,
 }
 
 static int
-lpfc_els_rcv_rrq(struct lpfc_hba * phba, struct lpfc_iocbq * cmdiocb,
+lpfc_els_rcv_lirr(struct lpfc_hba * phba, struct lpfc_iocbq * cmdiocb,
+                 struct lpfc_nodelist * ndlp)
+{
+        struct ls_rjt stat;
+
+        /* For now, unconditionally reject this command */
+        stat.un.b.lsRjtRsvd0 = 0;
+        stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+        stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+        stat.un.b.vendorUnique = 0;
+        lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
+        return 0;
+}
+
+void
+lpfc_els_rsp_rps_acc(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
+{
+        struct lpfc_sli *psli;
+        struct lpfc_sli_ring *pring;
+        MAILBOX_t *mb;
+        IOCB_t *icmd;
+        RPS_RSP *rps_rsp;
+        uint8_t *pcmd;
+        struct lpfc_iocbq *elsiocb;
+        struct lpfc_nodelist *ndlp;
+        uint16_t xri, status;
+        uint32_t cmdsize;
+
+        psli = &phba->sli;
+        pring = &psli->ring[LPFC_ELS_RING];
+        mb = &pmb->mb;
+
+        ndlp = (struct lpfc_nodelist *) pmb->context2;
+        xri = (uint16_t) ((unsigned long)(pmb->context1));
+        pmb->context1 = 0;
+        pmb->context2 = 0;
+
+        if (mb->mbxStatus) {
+                mempool_free( pmb, phba->mbox_mem_pool);
+                return;
+        }
+
+        cmdsize = sizeof(RPS_RSP) + sizeof(uint32_t);
+        mempool_free( pmb, phba->mbox_mem_pool);
+        if ((elsiocb = lpfc_prep_els_iocb(phba, 0, cmdsize, 3,
+                                          ndlp, ELS_CMD_ACC)) == 0) {
+                return;
+        }
+
+        icmd = &elsiocb->iocb;
+        icmd->ulpContext = xri;
+
+        pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
+        *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+        pcmd += sizeof (uint32_t); /* Skip past command */
+        rps_rsp = (RPS_RSP *)pcmd;
+
+        if (phba->fc_topology != TOPOLOGY_LOOP)
+                status = 0x10;
+        else
+                status = 0x8;
+        if (phba->fc_flag & FC_FABRIC)
+                status |= 0x4;
+
+        rps_rsp->rsvd1 = 0;
+        rps_rsp->portStatus = be16_to_cpu(status);
+        rps_rsp->linkFailureCnt = be32_to_cpu(mb->un.varRdLnk.linkFailureCnt);
+        rps_rsp->lossSyncCnt = be32_to_cpu(mb->un.varRdLnk.lossSyncCnt);
+        rps_rsp->lossSignalCnt = be32_to_cpu(mb->un.varRdLnk.lossSignalCnt);
+        rps_rsp->primSeqErrCnt = be32_to_cpu(mb->un.varRdLnk.primSeqErrCnt);
+        rps_rsp->invalidXmitWord = be32_to_cpu(mb->un.varRdLnk.invalidXmitWord);
+        rps_rsp->crcCnt = be32_to_cpu(mb->un.varRdLnk.crcCnt);
+
+        /* Xmit ELS RPS ACC response tag <ulpIoTag> */
+        lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+                        "%d:0128 Xmit ELS RPS ACC response tag x%x "
+                        "Data: x%x x%x x%x x%x x%x\n",
+                        phba->brd_no,
+                        elsiocb->iocb.ulpIoTag,
+                        elsiocb->iocb.ulpContext, ndlp->nlp_DID,
+                        ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
+
+        elsiocb->iocb_cmpl = lpfc_cmpl_els_acc;
+        phba->fc_stat.elsXmitACC++;
+        if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
+                lpfc_els_free_iocb(phba, elsiocb);
+        }
+        return;
+}
+
+static int
+lpfc_els_rcv_rps(struct lpfc_hba * phba, struct lpfc_iocbq * cmdiocb,
                  struct lpfc_nodelist * ndlp)
 {
-        struct lpfc_dmabuf *pcmd;
         uint32_t *lp;
+        uint8_t flag;
+        LPFC_MBOXQ_t *mbox;
+        struct lpfc_dmabuf *pcmd;
+        RPS *rps;
+        struct ls_rjt stat;
+
+        if((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+           (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
+                stat.un.b.lsRjtRsvd0 = 0;
+                stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+                stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+                stat.un.b.vendorUnique = 0;
+                lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
+        }
+
+        pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
+        lp = (uint32_t *) pcmd->virt;
+        flag = (be32_to_cpu(*lp++) & 0xf);
+        rps = (RPS *) lp;
+
+        if ((flag == 0) ||
+            ((flag == 1) && (be32_to_cpu(rps->un.portNum) == 0)) ||
+            ((flag == 2) && (memcmp(&rps->un.portName, &phba->fc_portname,
+                           sizeof (struct lpfc_name)) == 0))) {
+                if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC))) {
+                        lpfc_read_lnk_stat(phba, mbox);
+                        mbox->context1 =
+                            (void *)((unsigned long)cmdiocb->iocb.ulpContext);
+                        mbox->context2 = ndlp;
+                        mbox->mbox_cmpl = lpfc_els_rsp_rps_acc;
+                        if (lpfc_sli_issue_mbox (phba, mbox,
+                            (MBX_NOWAIT | MBX_STOP_IOCB)) != MBX_NOT_FINISHED) {
+                                /* Mbox completion will send ELS Response */
+                                return 0;
+                        }
+                        mempool_free(mbox, phba->mbox_mem_pool);
+                }
+        }
+        stat.un.b.lsRjtRsvd0 = 0;
+        stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+        stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+        stat.un.b.vendorUnique = 0;
+        lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
+        return 0;
+}
+
+int
+lpfc_els_rsp_rpl_acc(struct lpfc_hba * phba, uint16_t cmdsize,
+                 struct lpfc_iocbq * oldiocb, struct lpfc_nodelist * ndlp)
+{
         IOCB_t *icmd;
+        IOCB_t *oldcmd;
+        RPL_RSP rpl_rsp;
+        struct lpfc_iocbq *elsiocb;
         struct lpfc_sli_ring *pring;
         struct lpfc_sli *psli;
-        RRQ *rrq;
-        uint32_t cmd, did;
+        uint8_t *pcmd;
 
         psli = &phba->sli;
-        pring = &psli->ring[LPFC_FCP_RING];
-        icmd = &cmdiocb->iocb;
-        did = icmd->un.elsreq64.remoteID;
+        pring = &psli->ring[LPFC_ELS_RING];     /* ELS ring */
+
+        if ((elsiocb =
+             lpfc_prep_els_iocb(phba, 0, cmdsize, oldiocb->retry,
+                                ndlp, ELS_CMD_ACC)) == 0) {
+                return 1;
+        }
+        icmd = &elsiocb->iocb;
+        oldcmd = &oldiocb->iocb;
+        icmd->ulpContext = oldcmd->ulpContext;  /* Xri */
+
+        pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
+        *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+        pcmd += sizeof (uint16_t);
+        *((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
+        pcmd += sizeof(uint16_t);
+
+        /* Setup the RPL ACC payload */
+        rpl_rsp.listLen = be32_to_cpu(1);
+        rpl_rsp.index = 0;
+        rpl_rsp.port_num_blk.portNum = 0;
+        rpl_rsp.port_num_blk.portID = be32_to_cpu(phba->fc_myDID);
+        memcpy(&rpl_rsp.port_num_blk.portName, &phba->fc_portname,
+            sizeof(struct lpfc_name));
+
+        memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
+
+
+        /* Xmit ELS RPL ACC response tag <ulpIoTag> */
+        lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+                        "%d:0128 Xmit ELS RPL ACC response tag x%x "
+                        "Data: x%x x%x x%x x%x x%x\n",
+                        phba->brd_no,
+                        elsiocb->iocb.ulpIoTag,
+                        elsiocb->iocb.ulpContext, ndlp->nlp_DID,
+                        ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
+
+        elsiocb->iocb_cmpl = lpfc_cmpl_els_acc;
+
+        phba->fc_stat.elsXmitACC++;
+        if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
+                lpfc_els_free_iocb(phba, elsiocb);
+                return 1;
+        }
+        return 0;
+}
+
+static int
+lpfc_els_rcv_rpl(struct lpfc_hba * phba, struct lpfc_iocbq * cmdiocb,
+                 struct lpfc_nodelist * ndlp)
+{
+        struct lpfc_dmabuf *pcmd;
+        uint32_t *lp;
+        uint32_t maxsize;
+        uint16_t cmdsize;
+        RPL *rpl;
+        struct ls_rjt stat;
+
+        if((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+           (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
+                stat.un.b.lsRjtRsvd0 = 0;
+                stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+                stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+                stat.un.b.vendorUnique = 0;
+                lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
+        }
+
         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
         lp = (uint32_t *) pcmd->virt;
+        rpl = (RPL *) (lp + 1);
 
-        cmd = *lp++;
-        rrq = (RRQ *) lp;
+        maxsize = be32_to_cpu(rpl->maxsize);
 
-        /* RRQ received */
-        /* Get oxid / rxid from payload and abort it */
-        spin_lock_irq(phba->host->host_lock);
-        if ((rrq->SID == be32_to_cpu(phba->fc_myDID))) {
-                lpfc_sli_abort_iocb(phba, pring, 0, 0, rrq->Oxid,
-                                                        LPFC_CTX_CTX);
-        } else {
-                lpfc_sli_abort_iocb(phba, pring, 0, 0, rrq->Rxid,
-                                                        LPFC_CTX_CTX);
+        /* We support only one port */
+        if ((rpl->index == 0) &&
+            ((maxsize == 0) ||
+             ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
+                cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
         }
-
-        spin_unlock_irq(phba->host->host_lock);
-        /* ACCEPT the rrq request */
-        lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
+        else {
+                cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
+        }
+        lpfc_els_rsp_rpl_acc(phba, cmdsize, cmdiocb, ndlp);
 
         return 0;
 }
@@ -3201,10 +3403,6 @@ lpfc_els_unsol_event(struct lpfc_hba * phba,
                 phba->fc_stat.elsRcvFAN++;
                 lpfc_els_rcv_fan(phba, elsiocb, ndlp);
                 break;
-        case ELS_CMD_RRQ:
-                phba->fc_stat.elsRcvRRQ++;
-                lpfc_els_rcv_rrq(phba, elsiocb, ndlp);
-                break;
         case ELS_CMD_PRLI:
                 phba->fc_stat.elsRcvPRLI++;
                 if (phba->hba_state < LPFC_DISC_AUTH) {
@@ -3213,9 +3411,33 @@ lpfc_els_unsol_event(struct lpfc_hba * phba,
                 }
                 lpfc_disc_state_machine(phba, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
                 break;
+        case ELS_CMD_LIRR:
+                phba->fc_stat.elsRcvLIRR++;
+                lpfc_els_rcv_lirr(phba, elsiocb, ndlp);
+                if (newnode) {
+                        mempool_free( ndlp, phba->nlp_mem_pool);
+                }
+                break;
+        case ELS_CMD_RPS:
+                phba->fc_stat.elsRcvRPS++;
+                lpfc_els_rcv_rps(phba, elsiocb, ndlp);
+                if (newnode) {
+                        mempool_free( ndlp, phba->nlp_mem_pool);
+                }
+                break;
+        case ELS_CMD_RPL:
+                phba->fc_stat.elsRcvRPL++;
+                lpfc_els_rcv_rpl(phba, elsiocb, ndlp);
+                if (newnode) {
+                        mempool_free( ndlp, phba->nlp_mem_pool);
+                }
+                break;
         case ELS_CMD_RNID:
                 phba->fc_stat.elsRcvRNID++;
                 lpfc_els_rcv_rnid(phba, elsiocb, ndlp);
+                if (newnode) {
+                        mempool_free( ndlp, phba->nlp_mem_pool);
+                }
                 break;
         default:
                 /* Unsupported ELS command, reject */