[SCSI] lpfc: NPIV: add NPIV support on top of SLI-3
NPIV support is added to the driver. It utilizes the interfaces of
the fc transport for the creation and deletion of vports. Within the
driver, a new Scsi_Host is created for each NPIV instance, and is
paired with a new instance of a FC port. This allows N FC Port
elements to share a single Adapter.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
new file mode 100644
index 0000000..786125b
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -0,0 +1,508 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for *
+ * Fibre Channel Host Bus Adapters. *
+ * Copyright (C) 2004-2006 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/spinlock.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport_fc.h>
+#include "lpfc_hw.h"
+#include "lpfc_sli.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;
+ }
+}
+
+static int
+lpfc_alloc_vpi(struct lpfc_hba *phba)
+{
+ int vpi;
+
+ spin_lock_irq(&phba->hbalock);
+ vpi = find_next_zero_bit(phba->vpi_bmask, phba->max_vpi, 1);
+ if (vpi > phba->max_vpi)
+ vpi = 0;
+ else
+ set_bit(vpi, phba->vpi_bmask);
+ spin_unlock_irq(&phba->hbalock);
+ return vpi;
+}
+
+static void
+lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
+{
+ spin_lock_irq(&phba->hbalock);
+ clear_bit(vpi, phba->vpi_bmask);
+ 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->mb;
+
+ lpfc_read_sparam(phba, pmb, vport->vpi);
+ /*
+ * 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) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
+ "%d (%d):1818 VPort failed init, mbxCmd x%x "
+ "READ_SPARM mbxStatus x%x, rc = x%x\n",
+ phba->brd_no, vport->vpi,
+ mb->mbxCommand, mb->mbxStatus, rc);
+ lpfc_mbuf_free(phba, mp->virt, mp->phys);
+ kfree(mp);
+ 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,
+ "%d:1822 Invalid %s: %02x:%02x:%02x:%02x:"
+ "%02x:%02x:%02x:%02x\n",
+ phba->brd_no, 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;
+
+ 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)
+ return 0;
+ }
+ return 1;
+}
+
+int
+lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
+{
+ struct lpfc_nodelist *ndlp;
+ struct lpfc_vport *pport =
+ (struct lpfc_vport *) fc_vport->shost->hostdata;
+ struct lpfc_hba *phba = pport->phba;
+ struct lpfc_vport *vport = NULL;
+ int instance;
+ int vpi;
+ int rc = VPORT_ERROR;
+
+ if ((phba->sli_rev < 3) ||
+ !(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "%d:1808 Create VPORT failed: "
+ "NPIV is not enabled: SLImode:%d\n",
+ phba->brd_no, 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,
+ "%d:1809 Create VPORT failed: "
+ "Max VPORTs (%d) exceeded\n",
+ phba->brd_no, 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,
+ "%d:1810 Create VPORT failed: Cannot get "
+ "instance number\n", phba->brd_no);
+ lpfc_free_vpi(phba, vpi);
+ rc = VPORT_NORESOURCES;
+ goto error_out;
+ }
+
+ vport = lpfc_create_port(phba, instance, fc_vport);
+ if (!vport) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "%d:1811 Create VPORT failed: vpi x%x\n",
+ phba->brd_no, vpi);
+ lpfc_free_vpi(phba, vpi);
+ rc = VPORT_NORESOURCES;
+ goto error_out;
+ }
+
+ vport->vpi = vpi;
+ if (lpfc_vport_sparm(phba, vport)) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "%d:1813 Create VPORT failed: vpi:%d "
+ "Cannot get sparam\n",
+ phba->brd_no, vpi);
+ lpfc_free_vpi(phba, vpi);
+ destroy_port(vport);
+ rc = VPORT_NORESOURCES;
+ goto error_out;
+ }
+
+ memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
+ memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
+
+ if (fc_vport->node_name != 0)
+ u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
+ if (fc_vport->port_name != 0)
+ 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_log(phba, KERN_ERR, LOG_VPORT,
+ "%d:1821 Create VPORT failed: vpi:%d "
+ "Invalid WWN format\n",
+ phba->brd_no, vpi);
+ lpfc_free_vpi(phba, vpi);
+ destroy_port(vport);
+ rc = VPORT_INVAL;
+ goto error_out;
+ }
+
+ if (!lpfc_unique_wwpn(phba, vport)) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "%d:1823 Create VPORT failed: vpi:%d "
+ "Duplicate WWN on HBA\n",
+ phba->brd_no, vpi);
+ lpfc_free_vpi(phba, vpi);
+ destroy_port(vport);
+ rc = VPORT_INVAL;
+ goto error_out;
+ }
+
+ *(struct lpfc_vport **)fc_vport->dd_data = vport;
+ vport->fc_vport = fc_vport;
+
+ if ((phba->link_state < LPFC_LINK_UP) ||
+ (phba->fc_topology == TOPOLOGY_LOOP)) {
+ lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+ rc = VPORT_OK;
+ goto out;
+ }
+
+ if (disable) {
+ 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 && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ lpfc_set_disctmo(vport);
+ lpfc_initial_fdisc(vport);
+ } else {
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ }
+ rc = VPORT_OK;
+
+out:
+ lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
+error_out:
+ return rc;
+}
+
+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;
+
+ ndlp = lpfc_findnode_did(vport, Fabric_DID);
+ if (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 (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);
+
+ lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
+ return VPORT_OK;
+}
+
+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;
+
+ if ((phba->link_state < LPFC_LINK_UP) ||
+ (phba->fc_topology == TOPOLOGY_LOOP)) {
+ lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+ return VPORT_OK;
+ }
+
+ vport->load_flag |= FC_LOADING;
+ vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+
+ /* 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 && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ lpfc_set_disctmo(vport);
+ lpfc_initial_fdisc(vport);
+ } else {
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ }
+
+ 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 lpfc_nodelist *next_ndlp;
+ 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;
+ int rc = VPORT_ERROR;
+
+ /*
+ * 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) || !scsi_host_get(shost))
+ return VPORT_INVAL;
+
+ if (vport->port_type == LPFC_PHYSICAL_PORT) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "%d:1812 vport_delete failed: Cannot delete "
+ "physical host\n", phba->brd_no);
+ goto out;
+ }
+
+ vport->load_flag |= FC_UNLOADING;
+
+ kfree(vport->vname);
+ fc_remove_host(lpfc_shost_from_vport(vport));
+ scsi_remove_host(lpfc_shost_from_vport(vport));
+
+ ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+ if (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) {
+ /* 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);
+ } else {
+ lpfc_dequeue_node(vport, ndlp);
+ }
+ 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);
+ }
+
+skip_logo:
+ lpfc_sli_host_down(vport);
+
+ list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ lpfc_disc_state_machine(vport, ndlp, NULL,
+ NLP_EVT_DEVICE_RECOVERY);
+ lpfc_disc_state_machine(vport, ndlp, NULL,
+ NLP_EVT_DEVICE_RM);
+ }
+
+ list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ /* free any ndlp's in unused state */
+ if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
+ lpfc_drop_node(vport, ndlp);
+ }
+
+ 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);
+
+ 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);
+
+ rc = VPORT_OK;
+out:
+ scsi_host_put(shost);
+ return rc;
+}
+
+
+EXPORT_SYMBOL(lpfc_vport_create);
+EXPORT_SYMBOL(lpfc_vport_delete);