From: Rob Evers <revers@redhat.com>
Date: Wed, 17 Nov 2010 22:15:20 -0500
Subject: [scsi] lpfc: add handling of SLI4 unsolicted ELS
Message-id: <1290032123-5584-6-git-send-email-revers@redhat.com>
Patchwork-id: 29478
O-Subject: [RHEL5.6 PATCH 5/8] lpfc: add handling SLI4 unsolicted ELS. Read Link
Error Status Block (RLS) (CR: 110683)
Bugzilla: 649489
From: Rob Evers on behalf of Emulex <revers@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=649489
Fix regression error for handling SLI4 unsolicted ELS. Read Link Error Status Block (RLS) (CR: 110683)
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 84c4383..04ef3dc 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -200,6 +200,7 @@ struct lpfc_stats {
uint32_t elsRcvPRLO;
uint32_t elsRcvPRLI;
uint32_t elsRcvLIRR;
+ uint32_t elsRcvRLS;
uint32_t elsRcvRPS;
uint32_t elsRcvRPL;
uint32_t elsRcvRRQ;
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index cf2875c..2966be2 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -4760,6 +4760,89 @@ lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
}
/**
+ * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
+ * @phba: pointer to lpfc hba data structure.
+ * @pmb: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine is the completion callback function for the MBX_READ_LNK_STAT
+ * mailbox command. This callback function is to actually send the Accept
+ * (ACC) response to a Read Port Status (RPS) unsolicited IOCB event. It
+ * collects the link statistics from the completion of the MBX_READ_LNK_STAT
+ * mailbox command, constructs the RPS response with the link statistics
+ * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
+ * response to the RPS.
+ *
+ * Note that, in lpfc_prep_els_iocb() routine, the reference count of ndlp
+ * will be incremented by 1 for holding the ndlp and the reference to ndlp
+ * will be stored into the context1 field of the IOCB for the completion
+ * callback function to the RPS Accept Response ELS IOCB command.
+ *
+ **/
+static void
+lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
+{
+ MAILBOX_t *mb;
+ IOCB_t *icmd;
+ struct RLS_RSP *rls_rsp;
+ uint8_t *pcmd;
+ struct lpfc_iocbq *elsiocb;
+ struct lpfc_nodelist *ndlp;
+ uint16_t xri;
+ uint32_t cmdsize;
+
+ mb = &pmb->u.mb;
+
+ ndlp = (struct lpfc_nodelist *) pmb->context2;
+ xri = (uint16_t) ((unsigned long)(pmb->context1));
+ pmb->context1 = NULL;
+ pmb->context2 = NULL;
+
+ if (mb->mbxStatus) {
+ mempool_free(pmb, phba->mbox_mem_pool);
+ return;
+ }
+
+ cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
+ mempool_free(pmb, phba->mbox_mem_pool);
+ elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
+ lpfc_max_els_tries, ndlp,
+ ndlp->nlp_DID, ELS_CMD_ACC);
+
+ /* Decrement the ndlp reference count from previous mbox command */
+ lpfc_nlp_put(ndlp);
+
+ if (!elsiocb)
+ 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 */
+ rls_rsp = (struct RLS_RSP *)pcmd;
+
+ rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
+ rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
+ rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
+ rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
+ rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
+ rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
+
+ /* Xmit ELS RLS ACC response tag <ulpIoTag> */
+ lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
+ "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
+ "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
+ elsiocb->iotag, elsiocb->iocb.ulpContext,
+ ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+ ndlp->nlp_rpi);
+ elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
+ phba->fc_stat.elsXmitACC++;
+ if (lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0) == IOCB_ERROR)
+ lpfc_els_free_iocb(phba, elsiocb);
+}
+
+/**
* lpfc_els_rsp_rps_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
* @phba: pointer to lpfc hba data structure.
* @pmb: pointer to the driver internal queue element for mailbox command.
@@ -4852,6 +4935,72 @@ lpfc_els_rsp_rps_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
}
/**
+ * lpfc_els_rcv_rls - Process an unsolicited rls iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Read Port Status (RPL) IOCB received as an
+ * ELS unsolicited event. It first checks the remote port state. If the
+ * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
+ * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
+ * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
+ * for reading the HBA link statistics. It is for the callback function,
+ * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
+ * to actually sending out RPL Accept (ACC) response.
+ *
+ * Return codes
+ * 0 - Successfully processed rls iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+ struct lpfc_nodelist *ndlp)
+{
+ struct lpfc_hba *phba = vport->phba;
+ uint32_t *lp;
+ LPFC_MBOXQ_t *mbox;
+ struct lpfc_dmabuf *pcmd;
+ struct RLS *rls;
+ struct ls_rjt stat;
+
+ if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+ (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
+ /* reject the unsolicited RPS request and done with it */
+ goto reject_out;
+
+ pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
+ lp = (uint32_t *) pcmd->virt;
+ rls = (struct RLS *) lp;
+
+ mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
+ if (mbox) {
+ lpfc_read_lnk_stat(phba, mbox);
+ mbox->context1 =
+ (void *)((unsigned long) cmdiocb->iocb.ulpContext);
+ mbox->context2 = lpfc_nlp_get(ndlp);
+ mbox->vport = vport;
+ mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
+ if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
+ != MBX_NOT_FINISHED)
+ /* Mbox completion will send ELS Response */
+ return 0;
+ /* Decrement reference count used for the failed mbox
+ * command.
+ */
+ lpfc_nlp_put(ndlp);
+ mempool_free(mbox, phba->mbox_mem_pool);
+ }
+reject_out:
+ /* issue rejection response */
+ 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(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
+ return 0;
+}
+
+/**
* lpfc_els_rcv_rps - Process an unsolicited rps iocb
* @vport: pointer to a host virtual N_Port data structure.
* @cmdiocb: pointer to lpfc command iocb data structure.
@@ -5042,7 +5191,6 @@ lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
lp = (uint32_t *) pcmd->virt;
rpl = (RPL *) (lp + 1);
-
maxsize = be32_to_cpu(rpl->maxsize);
/* We support only one port */
@@ -6221,6 +6369,16 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
if (newnode)
lpfc_nlp_put(ndlp);
break;
+ case ELS_CMD_RLS:
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+ "RCV RLS: did:x%x/ste:x%x flg:x%x",
+ did, vport->port_state, ndlp->nlp_flag);
+
+ phba->fc_stat.elsRcvRLS++;
+ lpfc_els_rcv_rls(vport, elsiocb, ndlp);
+ if (newnode)
+ lpfc_nlp_put(ndlp);
+ break;
case ELS_CMD_RPS:
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
"RCV RPS: did:x%x/ste:x%x flg:x%x",
diff --git a/drivers/scsi/lpfc/lpfc_hw.h b/drivers/scsi/lpfc/lpfc_hw.h
index e354933..a478ee9 100644
--- a/drivers/scsi/lpfc/lpfc_hw.h
+++ b/drivers/scsi/lpfc/lpfc_hw.h
@@ -886,6 +886,25 @@ typedef struct _RPS_RSP { /* Structure is in Big Endian format */
uint32_t crcCnt;
} RPS_RSP;
+struct RLS { /* Structure is in Big Endian format */
+ uint32_t rls;
+#define rls_rsvd_SHIFT 24
+#define rls_rsvd_MASK 0x000000ff
+#define rls_rsvd_WORD rls;
+#define rls_did_SHIFT 0
+#define rls_did_MASK 0x00ffffff;
+#define rls_did_WORD rls;
+};
+
+struct RLS_RSP { /* Structure is in Big Endian format */
+ uint32_t linkFailureCnt;
+ uint32_t lossSyncCnt;
+ uint32_t lossSignalCnt;
+ uint32_t primSeqErrCnt;
+ uint32_t invalidXmitWord;
+ uint32_t crcCnt;
+};
+
typedef struct _RPL { /* Structure is in Big Endian format */
uint32_t maxsize;
uint32_t index;
