+
+/**
+ * lpfc_fabric_login_reqd - Check if FLOGI required.
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to FDISC command iocb.
+ * @rspiocb: pointer to FDISC response iocb.
+ *
+ * This routine checks if a FLOGI is reguired for FDISC
+ * to succeed.
+ **/
+static int
+lpfc_fabric_login_reqd(struct lpfc_hba *phba,
+ struct lpfc_iocbq *cmdiocb,
+ struct lpfc_iocbq *rspiocb)
+{
+
+ if ((rspiocb->iocb.ulpStatus != IOSTAT_FABRIC_RJT) ||
+ (rspiocb->iocb.un.ulpWord[4] != RJT_LOGIN_REQUIRED))
+ return 0;
+ else
+ return 1;
+}
+
+/**
+ * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function to a Fabric Discover
+ * (FDISC) ELS command. Since all the FDISC ELS commands are issued
+ * single threaded, each FDISC completion callback function will reset
+ * the discovery timer for all vports such that the timers will not get
+ * unnecessary timeout. The function checks the FDISC IOCB status. If error
+ * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
+ * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
+ * assigned to the vport has been changed with the completion of the FDISC
+ * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
+ * are unregistered from the HBA, and then the lpfc_register_new_vport()
+ * routine is invoked to register new vport with the HBA. Otherwise, the
+ * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
+ * Server for State Change Request (SCR).
+ **/
+static void
+lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+ struct lpfc_iocbq *rspiocb)
+{
+ struct lpfc_vport *vport = cmdiocb->vport;
+ struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+ struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
+ struct lpfc_nodelist *np;
+ struct lpfc_nodelist *next_np;
+ IOCB_t *irsp = &rspiocb->iocb;
+ struct lpfc_iocbq *piocb;
+
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+ "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
+ irsp->ulpStatus, irsp->un.ulpWord[4],
+ vport->fc_prevDID);
+ /* Since all FDISCs are being single threaded, we
+ * must reset the discovery timer for ALL vports
+ * waiting to send FDISC when one completes.
+ */
+ list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
+ lpfc_set_disctmo(piocb->vport);
+ }
+
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+ "FDISC cmpl: status:x%x/x%x prevdid:x%x",
+ irsp->ulpStatus, irsp->un.ulpWord[4], vport->fc_prevDID);
+
+ if (irsp->ulpStatus) {
+
+ if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
+ lpfc_retry_pport_discovery(phba);
+ goto out;
+ }
+
+ /* Check for retry */
+ if (lpfc_els_retry(phba, cmdiocb, rspiocb))
+ goto out;
+ /* FDISC failed */
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+ "0126 FDISC failed. (%d/%d)\n",
+ irsp->ulpStatus, irsp->un.ulpWord[4]);
+ goto fdisc_failed;
+ }
+ spin_lock_irq(shost->host_lock);
+ vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
+ vport->fc_flag |= FC_FABRIC;
+ if (vport->phba->fc_topology == TOPOLOGY_LOOP)
+ vport->fc_flag |= FC_PUBLIC_LOOP;
+ spin_unlock_irq(shost->host_lock);
+
+ vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
+ lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
+ if ((vport->fc_prevDID != vport->fc_myDID) &&
+ !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
+ /* If our NportID changed, we need to ensure all
+ * remaining NPORTs get unreg_login'ed so we can
+ * issue unreg_vpi.
+ */
+ list_for_each_entry_safe(np, next_np,
+ &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp) ||
+ (np->nlp_state != NLP_STE_NPR_NODE) ||
+ !(np->nlp_flag & NLP_NPR_ADISC))
+ continue;
+ spin_lock_irq(shost->host_lock);
+ np->nlp_flag &= ~NLP_NPR_ADISC;
+ spin_unlock_irq(shost->host_lock);
+ lpfc_unreg_rpi(vport, np);
+ }
+ lpfc_mbx_unreg_vpi(vport);
+ spin_lock_irq(shost->host_lock);
+ vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+ vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+ spin_unlock_irq(shost->host_lock);
+ }
+
+ if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI)
+ lpfc_issue_init_vpi(vport);
+ else if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
+ lpfc_register_new_vport(phba, vport, ndlp);
+ else
+ lpfc_do_scr_ns_plogi(phba, vport);
+ goto out;
+fdisc_failed:
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ /* Cancel discovery timer */
+ lpfc_can_disctmo(vport);
+ lpfc_nlp_put(ndlp);
+out:
+ lpfc_els_free_iocb(phba, cmdiocb);
+}
+
+/**
+ * lpfc_issue_els_fdisc - Issue a fdisc iocb command
+ * @vport: pointer to a virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
+ * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
+ * routine to issue the IOCB, which makes sure only one outstanding fabric
+ * IOCB will be sent off HBA at any given time.
+ *
+ * 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 FDISC ELS command.
+ *
+ * Return code
+ * 0 - Successfully issued fdisc iocb command
+ * 1 - Failed to issue fdisc iocb command
+ **/
+static int
+lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+ uint8_t retry)
+{
+ struct lpfc_hba *phba = vport->phba;
+ IOCB_t *icmd;
+ struct lpfc_iocbq *elsiocb;
+ struct serv_parm *sp;
+ uint8_t *pcmd;
+ uint16_t cmdsize;
+ int did = ndlp->nlp_DID;
+ int rc;
+
+ vport->port_state = LPFC_FDISC;
+ cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
+ elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
+ ELS_CMD_FDISC);
+ if (!elsiocb) {
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+ "0255 Issue FDISC: no IOCB\n");
+ return 1;
+ }
+
+ icmd = &elsiocb->iocb;
+ icmd->un.elsreq64.myID = 0;
+ icmd->un.elsreq64.fl = 1;
+
+ if (phba->sli_rev == LPFC_SLI_REV4) {
+ /* FDISC needs to be 1 for WQE VPI */
+ elsiocb->iocb.ulpCt_h = (SLI4_CT_VPI >> 1) & 1;
+ elsiocb->iocb.ulpCt_l = SLI4_CT_VPI & 1 ;
+ /* Set the ulpContext to the vpi */
+ elsiocb->iocb.ulpContext = vport->vpi + phba->vpi_base;
+ } else {
+ /* For FDISC, Let FDISC rsp set the NPortID for this VPI */
+ icmd->ulpCt_h = 1;
+ icmd->ulpCt_l = 0;
+ }
+
+ pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
+ *((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
+ pcmd += sizeof(uint32_t); /* CSP Word 1 */
+ memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
+ sp = (struct serv_parm *) pcmd;
+ /* Setup CSPs accordingly for Fabric */
+ sp->cmn.e_d_tov = 0;
+ sp->cmn.w2.r_a_tov = 0;
+ sp->cls1.classValid = 0;
+ sp->cls2.seqDelivery = 1;
+ sp->cls3.seqDelivery = 1;
+
+ pcmd += sizeof(uint32_t); /* CSP Word 2 */
+ pcmd += sizeof(uint32_t); /* CSP Word 3 */
+ pcmd += sizeof(uint32_t); /* CSP Word 4 */
+ pcmd += sizeof(uint32_t); /* Port Name */
+ memcpy(pcmd, &vport->fc_portname, 8);
+ pcmd += sizeof(uint32_t); /* Node Name */
+ pcmd += sizeof(uint32_t); /* Node Name */
+ memcpy(pcmd, &vport->fc_nodename, 8);
+
+ lpfc_set_disctmo(vport);
+
+ phba->fc_stat.elsXmitFDISC++;
+ elsiocb->iocb_cmpl = lpfc_cmpl_els_fdisc;
+
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+ "Issue FDISC: did:x%x",
+ did, 0, 0);
+
+ rc = lpfc_issue_fabric_iocb(phba, elsiocb);
+ if (rc == IOCB_ERROR) {
+ lpfc_els_free_iocb(phba, elsiocb);
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+ "0256 Issue FDISC: Cannot send IOCB\n");
+ return 1;
+ }
+ lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
+ return 0;
+}
+
+/**
+ * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function to the issuing of a LOGO
+ * ELS command off a vport. It frees the command IOCB and then decrement the
+ * reference count held on ndlp for this completion function, indicating that
+ * the reference to the ndlp is no long needed. Note that the
+ * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
+ * callback function and an additional explicit ndlp reference decrementation
+ * will trigger the actual release of the ndlp.
+ **/
+static void
+lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+ struct lpfc_iocbq *rspiocb)
+{
+ struct lpfc_vport *vport = cmdiocb->vport;
+ IOCB_t *irsp;
+ struct lpfc_nodelist *ndlp;
+ ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
+
+ irsp = &rspiocb->iocb;
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+ "LOGO npiv cmpl: status:x%x/x%x did:x%x",
+ irsp->ulpStatus, irsp->un.ulpWord[4], irsp->un.rcvels.remoteID);
+
+ lpfc_els_free_iocb(phba, cmdiocb);
+ vport->unreg_vpi_cmpl = VPORT_ERROR;
+
+ /* Trigger the release of the ndlp after logo */
+ lpfc_nlp_put(ndlp);
+}
+
+/**
+ * lpfc_issue_els_npiv_logo - Issue a logo off a vport
+ * @vport: pointer to a virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine issues a LOGO ELS command to an @ndlp off a @vport.
+ *
+ * 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 LOGO ELS command.
+ *
+ * Return codes
+ * 0 - Successfully issued logo off the @vport
+ * 1 - Failed to issue logo off the @vport
+ **/
+int
+lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+ struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+ struct lpfc_hba *phba = vport->phba;
+ IOCB_t *icmd;
+ struct lpfc_iocbq *elsiocb;
+ uint8_t *pcmd;
+ uint16_t cmdsize;
+
+ cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
+ elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
+ ELS_CMD_LOGO);
+ if (!elsiocb)
+ return 1;
+
+ icmd = &elsiocb->iocb;
+ pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
+ *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
+ pcmd += sizeof(uint32_t);
+
+ /* Fill in LOGO payload */
+ *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
+ pcmd += sizeof(uint32_t);
+ memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
+
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+ "Issue LOGO npiv did:x%x flg:x%x",
+ ndlp->nlp_DID, ndlp->nlp_flag, 0);
+
+ elsiocb->iocb_cmpl = lpfc_cmpl_els_npiv_logo;
+ spin_lock_irq(shost->host_lock);
+ ndlp->nlp_flag |= NLP_LOGO_SND;
+ spin_unlock_irq(shost->host_lock);
+ if (lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0) ==
+ IOCB_ERROR) {
+ spin_lock_irq(shost->host_lock);
+ ndlp->nlp_flag &= ~NLP_LOGO_SND;
+ spin_unlock_irq(shost->host_lock);
+ lpfc_els_free_iocb(phba, elsiocb);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * lpfc_fabric_block_timeout - Handler function to the fabric block timer
+ * @ptr: holder for the timer function associated data.
+ *
+ * This routine is invoked by the fabric iocb block timer after
+ * timeout. It posts the fabric iocb block timeout event by setting the
+ * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
+ * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
+ * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
+ * posted event WORKER_FABRIC_BLOCK_TMO.
+ **/
+void
+lpfc_fabric_block_timeout(unsigned long ptr)
+{
+ struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
+ unsigned long iflags;
+ uint32_t tmo_posted;
+
+ spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
+ tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
+ if (!tmo_posted)
+ phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
+ spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
+
+ if (!tmo_posted)
+ lpfc_worker_wake_up(phba);
+ return;
+}
+
+/**
+ * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine issues one fabric iocb from the driver internal list to
+ * the HBA. It first checks whether it's ready to issue one fabric iocb to
+ * the HBA (whether there is no outstanding fabric iocb). If so, it shall
+ * remove one pending fabric iocb from the driver internal list and invokes
+ * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
+ **/
+static void
+lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
+{
+ struct lpfc_iocbq *iocb;
+ unsigned long iflags;
+ int ret;
+ IOCB_t *cmd;
+
+repeat:
+ iocb = NULL;
+ spin_lock_irqsave(&phba->hbalock, iflags);
+ /* Post any pending iocb to the SLI layer */
+ if (atomic_read(&phba->fabric_iocb_count) == 0) {
+ list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
+ list);
+ if (iocb)
+ /* Increment fabric iocb count to hold the position */
+ atomic_inc(&phba->fabric_iocb_count);
+ }
+ spin_unlock_irqrestore(&phba->hbalock, iflags);
+ if (iocb) {
+ iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
+ iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
+ iocb->iocb_flag |= LPFC_IO_FABRIC;
+
+ lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
+ "Fabric sched1: ste:x%x",
+ iocb->vport->port_state, 0, 0);
+
+ ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
+
+ if (ret == IOCB_ERROR) {
+ iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
+ iocb->fabric_iocb_cmpl = NULL;
+ iocb->iocb_flag &= ~LPFC_IO_FABRIC;
+ cmd = &iocb->iocb;
+ cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
+ cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
+ iocb->iocb_cmpl(phba, iocb, iocb);
+
+ atomic_dec(&phba->fabric_iocb_count);
+ goto repeat;
+ }
+ }
+
+ return;
+}
+
+/**
+ * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine unblocks the issuing fabric iocb command. The function
+ * will clear the fabric iocb block bit and then invoke the routine
+ * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
+ * from the driver internal fabric iocb list.
+ **/
+void
+lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
+{
+ clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
+
+ lpfc_resume_fabric_iocbs(phba);
+ return;
+}
+
+/**
+ * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine blocks the issuing fabric iocb for a specified amount of
+ * time (currently 100 ms). This is done by set the fabric iocb block bit
+ * and set up a timeout timer for 100ms. When the block bit is set, no more
+ * fabric iocb will be issued out of the HBA.
+ **/
+static void
+lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
+{
+ int blocked;
+
+ blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
+ /* Start a timer to unblock fabric iocbs after 100ms */
+ if (!blocked)
+ mod_timer(&phba->fabric_block_timer, jiffies + HZ/10 );
+
+ return;
+}
+
+/**
+ * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the callback function that is put to the fabric iocb's
+ * callback function pointer (iocb->iocb_cmpl). The original iocb's callback
+ * function pointer has been stored in iocb->fabric_iocb_cmpl. This callback
+ * function first restores and invokes the original iocb's callback function
+ * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
+ * fabric bound iocb from the driver internal fabric iocb list onto the wire.
+ **/
+static void
+lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+ struct lpfc_iocbq *rspiocb)
+{
+ struct ls_rjt stat;
+
+ if ((cmdiocb->iocb_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC)
+ BUG();
+
+ switch (rspiocb->iocb.ulpStatus) {
+ case IOSTAT_NPORT_RJT:
+ case IOSTAT_FABRIC_RJT:
+ if (rspiocb->iocb.un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
+ lpfc_block_fabric_iocbs(phba);
+ }
+ break;
+
+ case IOSTAT_NPORT_BSY:
+ case IOSTAT_FABRIC_BSY:
+ lpfc_block_fabric_iocbs(phba);
+ break;
+
+ case IOSTAT_LS_RJT:
+ stat.un.lsRjtError =
+ be32_to_cpu(rspiocb->iocb.un.ulpWord[4]);
+ if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
+ (stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
+ lpfc_block_fabric_iocbs(phba);
+ break;
+ }
+
+ if (atomic_read(&phba->fabric_iocb_count) == 0)
+ BUG();
+
+ cmdiocb->iocb_cmpl = cmdiocb->fabric_iocb_cmpl;
+ cmdiocb->fabric_iocb_cmpl = NULL;
+ cmdiocb->iocb_flag &= ~LPFC_IO_FABRIC;
+ cmdiocb->iocb_cmpl(phba, cmdiocb, rspiocb);
+
+ atomic_dec(&phba->fabric_iocb_count);
+ if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
+ /* Post any pending iocbs to HBA */
+ lpfc_resume_fabric_iocbs(phba);
+ }
+}
+
+/**
+ * lpfc_issue_fabric_iocb - Issue a fabric iocb command
+ * @phba: pointer to lpfc hba data structure.
+ * @iocb: pointer to lpfc command iocb data structure.
+ *
+ * This routine is used as the top-level API for issuing a fabric iocb command
+ * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
+ * function makes sure that only one fabric bound iocb will be outstanding at
+ * any given time. As such, this function will first check to see whether there
+ * is already an outstanding fabric iocb on the wire. If so, it will put the
+ * newly issued iocb onto the driver internal fabric iocb list, waiting to be
+ * issued later. Otherwise, it will issue the iocb on the wire and update the
+ * fabric iocb count it indicate that there is one fabric iocb on the wire.
+ *
+ * Note, this implementation has a potential sending out fabric IOCBs out of
+ * order. The problem is caused by the construction of the "ready" boolen does
+ * not include the condition that the internal fabric IOCB list is empty. As
+ * such, it is possible a fabric IOCB issued by this routine might be "jump"
+ * ahead of the fabric IOCBs in the internal list.
+ *
+ * Return code
+ * IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
+ * IOCB_ERROR - failed to issue fabric iocb
+ **/
+static int
+lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
+{
+ unsigned long iflags;
+ int ready;
+ int ret;
+
+ if (atomic_read(&phba->fabric_iocb_count) > 1)
+ BUG();
+
+ spin_lock_irqsave(&phba->hbalock, iflags);
+ ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
+ !test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
+
+ if (ready)
+ /* Increment fabric iocb count to hold the position */
+ atomic_inc(&phba->fabric_iocb_count);
+ spin_unlock_irqrestore(&phba->hbalock, iflags);
+ if (ready) {
+ iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
+ iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
+ iocb->iocb_flag |= LPFC_IO_FABRIC;
+
+ lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
+ "Fabric sched2: ste:x%x",
+ iocb->vport->port_state, 0, 0);
+
+ ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
+
+ if (ret == IOCB_ERROR) {
+ iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
+ iocb->fabric_iocb_cmpl = NULL;
+ iocb->iocb_flag &= ~LPFC_IO_FABRIC;
+ atomic_dec(&phba->fabric_iocb_count);
+ }
+ } else {
+ spin_lock_irqsave(&phba->hbalock, iflags);
+ list_add_tail(&iocb->list, &phba->fabric_iocb_list);
+ spin_unlock_irqrestore(&phba->hbalock, iflags);
+ ret = IOCB_SUCCESS;
+ }
+ return ret;
+}
+
+/**
+ * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
+ * @vport: pointer to a virtual N_Port data structure.
+ *
+ * This routine aborts all the IOCBs associated with a @vport from the
+ * driver internal fabric IOCB list. The list contains fabric IOCBs to be
+ * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
+ * list, removes each IOCB associated with the @vport off the list, set the
+ * status feild to IOSTAT_LOCAL_REJECT, and invokes the callback function
+ * associated with the IOCB.
+ **/
+static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
+{
+ LIST_HEAD(completions);
+ struct lpfc_hba *phba = vport->phba;
+ struct lpfc_iocbq *tmp_iocb, *piocb;
+
+ spin_lock_irq(&phba->hbalock);
+ list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
+ list) {
+
+ if (piocb->vport != vport)
+ continue;
+
+ list_move_tail(&piocb->list, &completions);
+ }
+ 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);
+}
+
+/**
+ * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine aborts all the IOCBs associated with an @ndlp from the
+ * driver internal fabric IOCB list. The list contains fabric IOCBs to be
+ * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
+ * list, removes each IOCB associated with the @ndlp off the list, set the
+ * status feild to IOSTAT_LOCAL_REJECT, and invokes the callback function
+ * associated with the IOCB.
+ **/
+void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
+{
+ LIST_HEAD(completions);
+ struct lpfc_hba *phba = ndlp->phba;
+ struct lpfc_iocbq *tmp_iocb, *piocb;
+ struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
+
+ spin_lock_irq(&phba->hbalock);
+ list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
+ list) {
+ if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
+
+ list_move_tail(&piocb->list, &completions);
+ }
+ }
+ 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);
+}
+
+/**
+ * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine aborts all the IOCBs currently on the driver internal
+ * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
+ * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
+ * list, removes IOCBs off the list, set the status feild to
+ * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
+ * the IOCB.
+ **/
+void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
+{
+ LIST_HEAD(completions);
+
+ spin_lock_irq(&phba->hbalock);
+ list_splice_init(&phba->fabric_iocb_list, &completions);
+ 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);
+}
+
+/**
+ * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
+ * @phba: pointer to lpfc hba data structure.
+ * @axri: pointer to the els xri abort wcqe structure.
+ *
+ * This routine is invoked by the worker thread to process a SLI4 slow-path
+ * ELS aborted xri.
+ **/
+void
+lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
+ struct sli4_wcqe_xri_aborted *axri)
+{
+ uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
+ struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
+ unsigned long iflag = 0;
+
+ spin_lock_irqsave(&phba->sli4_hba.abts_sgl_list_lock, iflag);
+ list_for_each_entry_safe(sglq_entry, sglq_next,
+ &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
+ if (sglq_entry->sli4_xritag == xri) {
+ list_del(&sglq_entry->list);
+ spin_unlock_irqrestore(
+ &phba->sli4_hba.abts_sgl_list_lock,
+ iflag);
+ spin_lock_irqsave(&phba->hbalock, iflag);
+
+ list_add_tail(&sglq_entry->list,
+ &phba->sli4_hba.lpfc_sgl_list);
+ spin_unlock_irqrestore(&phba->hbalock, iflag);
+ return;
+ }
+ }
+ spin_unlock_irqrestore(&phba->sli4_hba.abts_sgl_list_lock, iflag);
+}