--- /dev/null
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for *
+ * Fibre Channel Host Bus Adapters. *
+ * Copyright (C) 2004-2013 Emulex. All rights reserved. *
+ * EMULEX and SLI are trademarks of Emulex. *
+ * www.emulex.com *
+ * Portions Copyright (C) 2004-2005 Christoph Hellwig *
+ * *
+ * This program is free software; you can redistribute it and/or *
+ * modify it under the terms of version 2 of the GNU General *
+ * Public License as published by the Free Software Foundation. *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID. See the GNU General Public License for *
+ * more details, a copy of which can be found in the file COPYING *
+ * included with this package. *
+ *******************************************************************/
+
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/idr.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport_fc.h>
+#include "lpfc_hw4.h"
+#include "lpfc_hw.h"
+#include "lpfc_sli.h"
+#include "lpfc_sli4.h"
+#include "lpfc_nl.h"
+#include "lpfc_disc.h"
+#include "lpfc_scsi.h"
+#include "lpfc.h"
+#include "lpfc_logmsg.h"
+#include "lpfc_crtn.h"
+#include "lpfc_version.h"
+#include "lpfc_vport.h"
+
+inline void lpfc_vport_set_state(struct lpfc_vport *vport,
+ enum fc_vport_state new_state)
+{
+ struct fc_vport *fc_vport = vport->fc_vport;
+
+ if (fc_vport) {
+ /*
+ * When the transport defines fc_vport_set state we will replace
+ * this code with the following line
+ */
+ /* fc_vport_set_state(fc_vport, new_state); */
+ if (new_state != FC_VPORT_INITIALIZING)
+ fc_vport->vport_last_state = fc_vport->vport_state;
+ fc_vport->vport_state = new_state;
+ }
+
+ /* for all the error states we will set the invternal state to FAILED */
+ switch (new_state) {
+ case FC_VPORT_NO_FABRIC_SUPP:
+ case FC_VPORT_NO_FABRIC_RSCS:
+ case FC_VPORT_FABRIC_LOGOUT:
+ case FC_VPORT_FABRIC_REJ_WWN:
+ case FC_VPORT_FAILED:
+ vport->port_state = LPFC_VPORT_FAILED;
+ break;
+ case FC_VPORT_LINKDOWN:
+ vport->port_state = LPFC_VPORT_UNKNOWN;
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
+}
+
+int
+lpfc_alloc_vpi(struct lpfc_hba *phba)
+{
+ unsigned long vpi;
+
+ spin_lock_irq(&phba->hbalock);
+ /* Start at bit 1 because vpi zero is reserved for the physical port */
+ vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
+ if (vpi > phba->max_vpi)
+ vpi = 0;
+ else
+ set_bit(vpi, phba->vpi_bmask);
+ if (phba->sli_rev == LPFC_SLI_REV4)
+ phba->sli4_hba.max_cfg_param.vpi_used++;
+ spin_unlock_irq(&phba->hbalock);
+ return vpi;
+}
+
+static void
+lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
+{
+ if (vpi == 0)
+ return;
+ spin_lock_irq(&phba->hbalock);
+ clear_bit(vpi, phba->vpi_bmask);
+ if (phba->sli_rev == LPFC_SLI_REV4)
+ phba->sli4_hba.max_cfg_param.vpi_used--;
+ spin_unlock_irq(&phba->hbalock);
+}
+
+static int
+lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
+{
+ LPFC_MBOXQ_t *pmb;
+ MAILBOX_t *mb;
+ struct lpfc_dmabuf *mp;
+ int rc;
+
+ pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+ if (!pmb) {
+ return -ENOMEM;
+ }
+ mb = &pmb->u.mb;
+
+ rc = lpfc_read_sparam(phba, pmb, vport->vpi);
+ if (rc) {
+ mempool_free(pmb, phba->mbox_mem_pool);
+ return -ENOMEM;
+ }
+
+ /*
+ * Grab buffer pointer and clear context1 so we can use
+ * lpfc_sli_issue_box_wait
+ */
+ mp = (struct lpfc_dmabuf *) pmb->context1;
+ pmb->context1 = NULL;
+
+ pmb->vport = vport;
+ rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
+ if (rc != MBX_SUCCESS) {
+ if (signal_pending(current)) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
+ "1830 Signal aborted mbxCmd x%x\n",
+ mb->mbxCommand);
+ lpfc_mbuf_free(phba, mp->virt, mp->phys);
+ kfree(mp);
+ if (rc != MBX_TIMEOUT)
+ mempool_free(pmb, phba->mbox_mem_pool);
+ return -EINTR;
+ } else {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
+ "1818 VPort failed init, mbxCmd x%x "
+ "READ_SPARM mbxStatus x%x, rc = x%x\n",
+ mb->mbxCommand, mb->mbxStatus, rc);
+ lpfc_mbuf_free(phba, mp->virt, mp->phys);
+ kfree(mp);
+ if (rc != MBX_TIMEOUT)
+ mempool_free(pmb, phba->mbox_mem_pool);
+ return -EIO;
+ }
+ }
+
+ memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
+ memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
+ sizeof (struct lpfc_name));
+ memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
+ sizeof (struct lpfc_name));
+
+ lpfc_mbuf_free(phba, mp->virt, mp->phys);
+ kfree(mp);
+ mempool_free(pmb, phba->mbox_mem_pool);
+
+ return 0;
+}
+
+static int
+lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
+ const char *name_type)
+{
+ /* ensure that IEEE format 1 addresses
+ * contain zeros in bits 59-48
+ */
+ if (!((wwn->u.wwn[0] >> 4) == 1 &&
+ ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
+ return 1;
+
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1822 Invalid %s: %02x:%02x:%02x:%02x:"
+ "%02x:%02x:%02x:%02x\n",
+ name_type,
+ wwn->u.wwn[0], wwn->u.wwn[1],
+ wwn->u.wwn[2], wwn->u.wwn[3],
+ wwn->u.wwn[4], wwn->u.wwn[5],
+ wwn->u.wwn[6], wwn->u.wwn[7]);
+ return 0;
+}
+
+static int
+lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
+{
+ struct lpfc_vport *vport;
+ unsigned long flags;
+
+ spin_lock_irqsave(&phba->hbalock, flags);
+ list_for_each_entry(vport, &phba->port_list, listentry) {
+ if (vport == new_vport)
+ continue;
+ /* If they match, return not unique */
+ if (memcmp(&vport->fc_sparam.portName,
+ &new_vport->fc_sparam.portName,
+ sizeof(struct lpfc_name)) == 0) {
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+ return 1;
+}
+
+/**
+ * lpfc_discovery_wait - Wait for driver discovery to quiesce
+ * @vport: The virtual port for which this call is being executed.
+ *
+ * This driver calls this routine specifically from lpfc_vport_delete
+ * to enforce a synchronous execution of vport
+ * delete relative to discovery activities. The
+ * lpfc_vport_delete routine should not return until it
+ * can reasonably guarantee that discovery has quiesced.
+ * Post FDISC LOGO, the driver must wait until its SAN teardown is
+ * complete and all resources recovered before allowing
+ * cleanup.
+ *
+ * This routine does not require any locks held.
+ **/
+static void lpfc_discovery_wait(struct lpfc_vport *vport)
+{
+ struct lpfc_hba *phba = vport->phba;
+ uint32_t wait_flags = 0;
+ unsigned long wait_time_max;
+ unsigned long start_time;
+
+ wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
+ FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
+
+ /*
+ * The time constraint on this loop is a balance between the
+ * fabric RA_TOV value and dev_loss tmo. The driver's
+ * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
+ */
+ wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
+ wait_time_max += jiffies;
+ start_time = jiffies;
+ while (time_before(jiffies, wait_time_max)) {
+ if ((vport->num_disc_nodes > 0) ||
+ (vport->fc_flag & wait_flags) ||
+ ((vport->port_state > LPFC_VPORT_FAILED) &&
+ (vport->port_state < LPFC_VPORT_READY))) {
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
+ "1833 Vport discovery quiesce Wait:"
+ " state x%x fc_flags x%x"
+ " num_nodes x%x, waiting 1000 msecs"
+ " total wait msecs x%x\n",
+ vport->port_state, vport->fc_flag,
+ vport->num_disc_nodes,
+ jiffies_to_msecs(jiffies - start_time));
+ msleep(1000);
+ } else {
+ /* Base case. Wait variants satisfied. Break out */
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
+ "1834 Vport discovery quiesced:"
+ " state x%x fc_flags x%x"
+ " wait msecs x%x\n",
+ vport->port_state, vport->fc_flag,
+ jiffies_to_msecs(jiffies
+ - start_time));
+ break;
+ }
+ }
+
+ if (time_after(jiffies, wait_time_max))
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1835 Vport discovery quiesce failed:"
+ " state x%x fc_flags x%x wait msecs x%x\n",
+ vport->port_state, vport->fc_flag,
+ jiffies_to_msecs(jiffies - start_time));
+}
+
+int
+lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
+{
+ struct lpfc_nodelist *ndlp;
+ struct Scsi_Host *shost = fc_vport->shost;
+ struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
+ struct lpfc_hba *phba = pport->phba;
+ struct lpfc_vport *vport = NULL;
+ int instance;
+ int vpi;
+ int rc = VPORT_ERROR;
+ int status;
+
+ if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1808 Create VPORT failed: "
+ "NPIV is not enabled: SLImode:%d\n",
+ phba->sli_rev);
+ rc = VPORT_INVAL;
+ goto error_out;
+ }
+
+ vpi = lpfc_alloc_vpi(phba);
+ if (vpi == 0) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1809 Create VPORT failed: "
+ "Max VPORTs (%d) exceeded\n",
+ phba->max_vpi);
+ rc = VPORT_NORESOURCES;
+ goto error_out;
+ }
+
+ /* Assign an unused board number */
+ if ((instance = lpfc_get_instance()) < 0) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1810 Create VPORT failed: Cannot get "
+ "instance number\n");
+ lpfc_free_vpi(phba, vpi);
+ rc = VPORT_NORESOURCES;
+ goto error_out;
+ }
+
+ vport = lpfc_create_port(phba, instance, &fc_vport->dev);
+ if (!vport) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1811 Create VPORT failed: vpi x%x\n", vpi);
+ lpfc_free_vpi(phba, vpi);
+ rc = VPORT_NORESOURCES;
+ goto error_out;
+ }
+
+ vport->vpi = vpi;
+ lpfc_debugfs_initialize(vport);
+
+ if ((status = lpfc_vport_sparm(phba, vport))) {
+ if (status == -EINTR) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1831 Create VPORT Interrupted.\n");
+ rc = VPORT_ERROR;
+ } else {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1813 Create VPORT failed. "
+ "Cannot get sparam\n");
+ rc = VPORT_NORESOURCES;
+ }
+ lpfc_free_vpi(phba, vpi);
+ destroy_port(vport);
+ goto error_out;
+ }
+
+ u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
+ u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
+
+ memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
+ memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
+
+ if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
+ !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1821 Create VPORT failed. "
+ "Invalid WWN format\n");
+ lpfc_free_vpi(phba, vpi);
+ destroy_port(vport);
+ rc = VPORT_INVAL;
+ goto error_out;
+ }
+
+ if (!lpfc_unique_wwpn(phba, vport)) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1823 Create VPORT failed. "
+ "Duplicate WWN on HBA\n");
+ lpfc_free_vpi(phba, vpi);
+ destroy_port(vport);
+ rc = VPORT_INVAL;
+ goto error_out;
+ }
+
+ /* Create binary sysfs attribute for vport */
+ lpfc_alloc_sysfs_attr(vport);
+
+ /* Set the DFT_LUN_Q_DEPTH accordingly */
+ vport->cfg_lun_queue_depth = phba->pport->cfg_lun_queue_depth;
+
+ *(struct lpfc_vport **)fc_vport->dd_data = vport;
+ vport->fc_vport = fc_vport;
+
+ /*
+ * In SLI4, the vpi must be activated before it can be used
+ * by the port.
+ */
+ if ((phba->sli_rev == LPFC_SLI_REV4) &&
+ (pport->fc_flag & FC_VFI_REGISTERED)) {
+ rc = lpfc_sli4_init_vpi(vport);
+ if (rc) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1838 Failed to INIT_VPI on vpi %d "
+ "status %d\n", vpi, rc);
+ rc = VPORT_NORESOURCES;
+ lpfc_free_vpi(phba, vpi);
+ goto error_out;
+ }
+ } else if (phba->sli_rev == LPFC_SLI_REV4) {
+ /*
+ * Driver cannot INIT_VPI now. Set the flags to
+ * init_vpi when reg_vfi complete.
+ */
+ vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+ lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+ rc = VPORT_OK;
+ goto out;
+ }
+
+ if ((phba->link_state < LPFC_LINK_UP) ||
+ (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
+ (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
+ lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+ rc = VPORT_OK;
+ goto out;
+ }
+
+ if (disable) {
+ lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
+ rc = VPORT_OK;
+ goto out;
+ }
+
+ /* Use the Physical nodes Fabric NDLP to determine if the link is
+ * up and ready to FDISC.
+ */
+ ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
+ lpfc_set_disctmo(vport);
+ lpfc_initial_fdisc(vport);
+ } else {
+ lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+ "0262 No NPIV Fabric support\n");
+ }
+ } else {
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ }
+ rc = VPORT_OK;
+
+out:
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1825 Vport Created.\n");
+ lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
+error_out:
+ return rc;
+}
+
+static int
+disable_vport(struct fc_vport *fc_vport)
+{
+ struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
+ struct lpfc_hba *phba = vport->phba;
+ struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
+ long timeout;
+ struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+ ndlp = lpfc_findnode_did(vport, Fabric_DID);
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)
+ && phba->link_state >= LPFC_LINK_UP) {
+ vport->unreg_vpi_cmpl = VPORT_INVAL;
+ timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
+ if (!lpfc_issue_els_npiv_logo(vport, ndlp))
+ while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
+ timeout = schedule_timeout(timeout);
+ }
+
+ lpfc_sli_host_down(vport);
+
+ /* Mark all nodes for discovery so we can remove them by
+ * calling lpfc_cleanup_rpis(vport, 1)
+ */
+ list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
+ if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
+ continue;
+ lpfc_disc_state_machine(vport, ndlp, NULL,
+ NLP_EVT_DEVICE_RECOVERY);
+ }
+ lpfc_cleanup_rpis(vport, 1);
+
+ lpfc_stop_vport_timers(vport);
+ lpfc_unreg_all_rpis(vport);
+ lpfc_unreg_default_rpis(vport);
+ /*
+ * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
+ * scsi_host_put() to release the vport.
+ */
+ lpfc_mbx_unreg_vpi(vport);
+ spin_lock_irq(shost->host_lock);
+ vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+ spin_unlock_irq(shost->host_lock);
+
+ lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1826 Vport Disabled.\n");
+ return VPORT_OK;
+}
+
+static int
+enable_vport(struct fc_vport *fc_vport)
+{
+ struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
+ struct lpfc_hba *phba = vport->phba;
+ struct lpfc_nodelist *ndlp = NULL;
+ struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+ if ((phba->link_state < LPFC_LINK_UP) ||
+ (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
+ lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+ return VPORT_OK;
+ }
+
+ spin_lock_irq(shost->host_lock);
+ vport->load_flag |= FC_LOADING;
+ vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+ spin_unlock_irq(shost->host_lock);
+
+ /* Use the Physical nodes Fabric NDLP to determine if the link is
+ * up and ready to FDISC.
+ */
+ ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)
+ && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
+ lpfc_set_disctmo(vport);
+ lpfc_initial_fdisc(vport);
+ } else {
+ lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+ "0264 No NPIV Fabric support\n");
+ }
+ } else {
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ }
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1827 Vport Enabled.\n");
+ return VPORT_OK;
+}
+
+int
+lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
+{
+ if (disable)
+ return disable_vport(fc_vport);
+ else
+ return enable_vport(fc_vport);
+}
+
+
+int
+lpfc_vport_delete(struct fc_vport *fc_vport)
+{
+ struct lpfc_nodelist *ndlp = NULL;
+ struct Scsi_Host *shost = (struct Scsi_Host *) fc_vport->shost;
+ struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
+ struct lpfc_hba *phba = vport->phba;
+ long timeout;
+ bool ns_ndlp_referenced = false;
+
+ if (vport->port_type == LPFC_PHYSICAL_PORT) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1812 vport_delete failed: Cannot delete "
+ "physical host\n");
+ return VPORT_ERROR;
+ }
+
+ /* If the vport is a static vport fail the deletion. */
+ if ((vport->vport_flag & STATIC_VPORT) &&
+ !(phba->pport->load_flag & FC_UNLOADING)) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1837 vport_delete failed: Cannot delete "
+ "static vport.\n");
+ return VPORT_ERROR;
+ }
+ spin_lock_irq(&phba->hbalock);
+ vport->load_flag |= FC_UNLOADING;
+ spin_unlock_irq(&phba->hbalock);
+ /*
+ * If we are not unloading the driver then prevent the vport_delete
+ * from happening until after this vport's discovery is finished.
+ */
+ if (!(phba->pport->load_flag & FC_UNLOADING)) {
+ int check_count = 0;
+ while (check_count < ((phba->fc_ratov * 3) + 3) &&
+ vport->port_state > LPFC_VPORT_FAILED &&
+ vport->port_state < LPFC_VPORT_READY) {
+ check_count++;
+ msleep(1000);
+ }
+ if (vport->port_state > LPFC_VPORT_FAILED &&
+ vport->port_state < LPFC_VPORT_READY)
+ return -EAGAIN;
+ }
+ /*
+ * This is a bit of a mess. We want to ensure the shost doesn't get
+ * torn down until we're done with the embedded lpfc_vport structure.
+ *
+ * Beyond holding a reference for this function, we also need a
+ * reference for outstanding I/O requests we schedule during delete
+ * processing. But once we scsi_remove_host() we can no longer obtain
+ * a reference through scsi_host_get().
+ *
+ * So we take two references here. We release one reference at the
+ * bottom of the function -- after delinking the vport. And we
+ * release the other at the completion of the unreg_vpi that get's
+ * initiated after we've disposed of all other resources associated
+ * with the port.
+ */
+ if (!scsi_host_get(shost))
+ return VPORT_INVAL;
+ if (!scsi_host_get(shost)) {
+ scsi_host_put(shost);
+ return VPORT_INVAL;
+ }
+ lpfc_free_sysfs_attr(vport);
+
+ lpfc_debugfs_terminate(vport);
+
+ /*
+ * The call to fc_remove_host might release the NameServer ndlp. Since
+ * we might need to use the ndlp to send the DA_ID CT command,
+ * increment the reference for the NameServer ndlp to prevent it from
+ * being released.
+ */
+ ndlp = lpfc_findnode_did(vport, NameServer_DID);
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
+ lpfc_nlp_get(ndlp);
+ ns_ndlp_referenced = true;
+ }
+
+ /* Remove FC host and then SCSI host with the vport */
+ fc_remove_host(lpfc_shost_from_vport(vport));
+ scsi_remove_host(lpfc_shost_from_vport(vport));
+
+ ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+
+ /* In case of driver unload, we shall not perform fabric logo as the
+ * worker thread already stopped at this stage and, in this case, we
+ * can safely skip the fabric logo.
+ */
+ if (phba->pport->load_flag & FC_UNLOADING) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
+ phba->link_state >= LPFC_LINK_UP) {
+ /* First look for the Fabric ndlp */
+ ndlp = lpfc_findnode_did(vport, Fabric_DID);
+ if (!ndlp)
+ goto skip_logo;
+ else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ goto skip_logo;
+ }
+ /* Remove ndlp from vport npld list */
+ lpfc_dequeue_node(vport, ndlp);
+
+ /* Indicate free memory when release */
+ spin_lock_irq(&phba->ndlp_lock);
+ NLP_SET_FREE_REQ(ndlp);
+ spin_unlock_irq(&phba->ndlp_lock);
+ /* Kick off release ndlp when it can be safely done */
+ lpfc_nlp_put(ndlp);
+ }
+ goto skip_logo;
+ }
+
+ /* Otherwise, we will perform fabric logo as needed */
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
+ phba->link_state >= LPFC_LINK_UP &&
+ phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
+ if (vport->cfg_enable_da_id) {
+ timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
+ if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
+ while (vport->ct_flags && timeout)
+ timeout = schedule_timeout(timeout);
+ else
+ lpfc_printf_log(vport->phba, KERN_WARNING,
+ LOG_VPORT,
+ "1829 CT command failed to "
+ "delete objects on fabric\n");
+ }
+ /* First look for the Fabric ndlp */
+ ndlp = lpfc_findnode_did(vport, Fabric_DID);
+ if (!ndlp) {
+ /* Cannot find existing Fabric ndlp, allocate one */
+ ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
+ if (!ndlp)
+ goto skip_logo;
+ lpfc_nlp_init(vport, ndlp, Fabric_DID);
+ /* Indicate free memory when release */
+ NLP_SET_FREE_REQ(ndlp);
+ } else {
+ if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ goto skip_logo;
+ }
+
+ /* Remove ndlp from vport list */
+ lpfc_dequeue_node(vport, ndlp);
+ spin_lock_irq(&phba->ndlp_lock);
+ if (!NLP_CHK_FREE_REQ(ndlp))
+ /* Indicate free memory when release */
+ NLP_SET_FREE_REQ(ndlp);
+ else {
+ /* Skip this if ndlp is already in free mode */
+ spin_unlock_irq(&phba->ndlp_lock);
+ goto skip_logo;
+ }
+ spin_unlock_irq(&phba->ndlp_lock);
+ }
+
+ /*
+ * If the vpi is not registered, then a valid FDISC doesn't
+ * exist and there is no need for a ELS LOGO. Just cleanup
+ * the ndlp.
+ */
+ if (!(vport->vpi_state & LPFC_VPI_REGISTERED)) {
+ lpfc_nlp_put(ndlp);
+ goto skip_logo;
+ }
+
+ vport->unreg_vpi_cmpl = VPORT_INVAL;
+ timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
+ if (!lpfc_issue_els_npiv_logo(vport, ndlp))
+ while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
+ timeout = schedule_timeout(timeout);
+ }
+
+ if (!(phba->pport->load_flag & FC_UNLOADING))
+ lpfc_discovery_wait(vport);
+
+skip_logo:
+
+ /*
+ * If the NameServer ndlp has been incremented to allow the DA_ID CT
+ * command to be sent, decrement the ndlp now.
+ */
+ if (ns_ndlp_referenced) {
+ ndlp = lpfc_findnode_did(vport, NameServer_DID);
+ lpfc_nlp_put(ndlp);
+ }
+
+ lpfc_cleanup(vport);
+ lpfc_sli_host_down(vport);
+
+ lpfc_stop_vport_timers(vport);
+
+ if (!(phba->pport->load_flag & FC_UNLOADING)) {
+ lpfc_unreg_all_rpis(vport);
+ lpfc_unreg_default_rpis(vport);
+ /*
+ * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
+ * does the scsi_host_put() to release the vport.
+ */
+ if (lpfc_mbx_unreg_vpi(vport))
+ scsi_host_put(shost);
+ } else
+ scsi_host_put(shost);
+
+ lpfc_free_vpi(phba, vport->vpi);
+ vport->work_port_events = 0;
+ spin_lock_irq(&phba->hbalock);
+ list_del_init(&vport->listentry);
+ spin_unlock_irq(&phba->hbalock);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
+ "1828 Vport Deleted.\n");
+ scsi_host_put(shost);
+ return VPORT_OK;
+}
+
+struct lpfc_vport **
+lpfc_create_vport_work_array(struct lpfc_hba *phba)
+{
+ struct lpfc_vport *port_iterator;
+ struct lpfc_vport **vports;
+ int index = 0;
+ vports = kzalloc((phba->max_vports + 1) * sizeof(struct lpfc_vport *),
+ GFP_KERNEL);
+ if (vports == NULL)
+ return NULL;
+ spin_lock_irq(&phba->hbalock);
+ list_for_each_entry(port_iterator, &phba->port_list, listentry) {
+ if (port_iterator->load_flag & FC_UNLOADING)
+ continue;
+ if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
+ lpfc_printf_vlog(port_iterator, KERN_ERR, LOG_VPORT,
+ "1801 Create vport work array FAILED: "
+ "cannot do scsi_host_get\n");
+ continue;
+ }
+ vports[index++] = port_iterator;
+ }
+ spin_unlock_irq(&phba->hbalock);
+ return vports;
+}
+
+void
+lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
+{
+ int i;
+ if (vports == NULL)
+ return;
+ for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
+ scsi_host_put(lpfc_shost_from_vport(vports[i]));
+ kfree(vports);
+}
+
+
+/**
+ * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
+ * @vport: Pointer to vport object.
+ *
+ * This function resets the statistical data for the vport. This function
+ * is called with the host_lock held
+ **/
+void
+lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
+{
+ struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
+
+ list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
+ if (ndlp->lat_data)
+ memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
+ sizeof(struct lpfc_scsicmd_bkt));
+ }
+}
+
+
+/**
+ * lpfc_alloc_bucket - Allocate data buffer required for statistical data
+ * @vport: Pointer to vport object.
+ *
+ * This function allocates data buffer required for all the FC
+ * nodes of the vport to collect statistical data.
+ **/
+void
+lpfc_alloc_bucket(struct lpfc_vport *vport)
+{
+ struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
+
+ list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
+
+ kfree(ndlp->lat_data);
+ ndlp->lat_data = NULL;
+
+ if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
+ ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
+ sizeof(struct lpfc_scsicmd_bkt),
+ GFP_ATOMIC);
+
+ if (!ndlp->lat_data)
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
+ "0287 lpfc_alloc_bucket failed to "
+ "allocate statistical data buffer DID "
+ "0x%x\n", ndlp->nlp_DID);
+ }
+ }
+}
+
+/**
+ * lpfc_free_bucket - Free data buffer required for statistical data
+ * @vport: Pointer to vport object.
+ *
+ * Th function frees statistical data buffer of all the FC
+ * nodes of the vport.
+ **/
+void
+lpfc_free_bucket(struct lpfc_vport *vport)
+{
+ struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
+
+ list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
+
+ kfree(ndlp->lat_data);
+ ndlp->lat_data = NULL;
+ }
+}
Code Review / kvmfornfv.git / blobdiff