[SCSI] qla2xxx: add support for NPIV
Following patch adds support for NPIV (N-Port ID Virtualization) to the
qla2xxx.
- supported within switched-fabric topologies only.
- supports up to 63 virtual ports on each physical port.
Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
new file mode 100644
index 0000000..54dc415
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -0,0 +1,497 @@
+/*
+ * QLOGIC LINUX SOFTWARE
+ *
+ * QLogic ISP2x00 device driver for Linux 2.6.x
+ * Copyright (C) 2003-2005 QLogic Corporation
+ * (www.qlogic.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ */
+#include "qla_def.h"
+
+#include <linux/version.h>
+#include <linux/moduleparam.h>
+#include <linux/vmalloc.h>
+#include <linux/smp_lock.h>
+#include <linux/list.h>
+
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+#include <linux/delay.h>
+
+void qla2x00_vp_stop_timer(scsi_qla_host_t *);
+
+void
+qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
+{
+ if (vha->parent && vha->timer_active) {
+ del_timer_sync(&vha->timer);
+ vha->timer_active = 0;
+ }
+}
+
+uint32_t
+qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
+{
+ uint32_t vp_id;
+ scsi_qla_host_t *ha = vha->parent;
+
+ /* Find an empty slot and assign an vp_id */
+ down(&ha->vport_sem);
+ vp_id = find_first_zero_bit((unsigned long *)ha->vp_idx_map,
+ MAX_MULTI_ID_FABRIC);
+ if (vp_id > MAX_MULTI_ID_FABRIC) {
+ DEBUG15(printk ("vp_id %d is bigger than MAX_MULTI_ID_FABRID\n",
+ vp_id));
+ up(&ha->vport_sem);
+ return vp_id;
+ }
+
+ set_bit(vp_id, (unsigned long *)ha->vp_idx_map);
+ ha->num_vhosts++;
+ vha->vp_idx = vp_id;
+ list_add_tail(&vha->vp_list, &ha->vp_list);
+ up(&ha->vport_sem);
+ return vp_id;
+}
+
+void
+qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
+{
+ uint16_t vp_id;
+ scsi_qla_host_t *ha = vha->parent;
+
+ down(&ha->vport_sem);
+ vp_id = vha->vp_idx;
+ ha->num_vhosts--;
+ clear_bit(vp_id, (unsigned long *)ha->vp_idx_map);
+ list_del(&vha->vp_list);
+ up(&ha->vport_sem);
+}
+
+scsi_qla_host_t *
+qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
+{
+ scsi_qla_host_t *vha;
+
+ /* Locate matching device in database. */
+ list_for_each_entry(vha, &ha->vp_list, vp_list) {
+ if (!memcmp(port_name, vha->port_name, WWN_SIZE))
+ return vha;
+ }
+ return NULL;
+}
+
+/*
+ * qla2x00_mark_vp_devices_dead
+ * Updates fcport state when device goes offline.
+ *
+ * Input:
+ * ha = adapter block pointer.
+ * fcport = port structure pointer.
+ *
+ * Return:
+ * None.
+ *
+ * Context:
+ */
+void
+qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
+{
+ fc_port_t *fcport;
+ scsi_qla_host_t *pha = to_qla_parent(vha);
+
+ list_for_each_entry(fcport, &pha->fcports, list) {
+ if (fcport->vp_idx != vha->vp_idx)
+ continue;
+
+ DEBUG15(printk("scsi(%ld): Marking port dead, "
+ "loop_id=0x%04x :%x\n",
+ vha->host_no, fcport->loop_id, fcport->vp_idx));
+
+ atomic_set(&fcport->state, FCS_DEVICE_DEAD);
+ qla2x00_mark_device_lost(vha, fcport, 0, 0);
+ }
+}
+
+int
+qla24xx_disable_vp(scsi_qla_host_t *vha)
+{
+ int ret;
+
+ ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
+ atomic_set(&vha->loop_state, LOOP_DOWN);
+ atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
+
+ /* Delete all vp's fcports from parent's list */
+ qla2x00_mark_vp_devices_dead(vha);
+ atomic_set(&vha->vp_state, VP_FAILED);
+ vha->flags.management_server_logged_in = 0;
+ if (ret == QLA_SUCCESS) {
+ fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
+ } else {
+ fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
+ return -1;
+ }
+ return 0;
+}
+
+int
+qla24xx_enable_vp(scsi_qla_host_t *vha)
+{
+ int ret;
+ scsi_qla_host_t *ha = vha->parent;
+
+ /* Check if physical ha port is Up */
+ if (atomic_read(&ha->loop_state) == LOOP_DOWN ||
+ atomic_read(&ha->loop_state) == LOOP_DEAD ) {
+ vha->vp_err_state = VP_ERR_PORTDWN;
+ fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
+ goto enable_failed;
+ }
+
+ /* Initialize the new vport unless it is a persistent port */
+ down(&ha->vport_sem);
+ ret = qla24xx_modify_vp_config(vha);
+ up(&ha->vport_sem);
+
+ if (ret != QLA_SUCCESS) {
+ fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
+ goto enable_failed;
+ }
+
+ DEBUG15(qla_printk(KERN_INFO, ha,
+ "Virtual port with id: %d - Enabled\n", vha->vp_idx));
+ return 0;
+
+enable_failed:
+ DEBUG15(qla_printk(KERN_INFO, ha,
+ "Virtual port with id: %d - Disabled\n", vha->vp_idx));
+ return 1;
+}
+
+/**
+ * qla24xx_modify_vport() - Modifies the virtual fabric port's configuration
+ * @ha: HA context
+ * @vp: pointer to buffer of virtual port parameters.
+ * @ret_code: return error code:
+ *
+ * Returns the virtual port id, or MAX_VSAN_ID, if couldn't create.
+ */
+uint32_t
+qla24xx_modify_vhba(scsi_qla_host_t *ha, vport_params_t *vp, uint32_t *vp_id)
+{
+ scsi_qla_host_t *vha;
+
+ vha = qla24xx_find_vhost_by_name(ha, vp->port_name);
+ if (!vha) {
+ *vp_id = MAX_NUM_VPORT_LOOP;
+ return VP_RET_CODE_WWPN;
+ }
+
+ if (qla24xx_enable_vp(vha)) {
+ scsi_host_put(vha->host);
+ qla2x00_mem_free(vha);
+ *vp_id = MAX_NUM_VPORT_LOOP;
+ return VP_RET_CODE_RESOURCES;
+ }
+
+ *vp_id = vha->vp_idx;
+ return VP_RET_CODE_OK;
+}
+
+void
+qla24xx_configure_vp(scsi_qla_host_t *vha)
+{
+ struct fc_vport *fc_vport;
+ int ret;
+
+ fc_vport = vha->fc_vport;
+
+ DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
+ vha->host_no, __func__));
+ ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
+ if (ret != QLA_SUCCESS) {
+ DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
+ " of RSCN requests: 0x%x\n", ret));
+ return;
+ } else {
+ /* Corresponds to SCR enabled */
+ clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
+ }
+
+ vha->flags.online = 1;
+ if (qla24xx_configure_vhba(vha))
+ return;
+
+ atomic_set(&vha->vp_state, VP_ACTIVE);
+ fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
+}
+
+void
+qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
+{
+ int i, vp_idx_matched;
+ scsi_qla_host_t *vha;
+
+ if (ha->parent)
+ return;
+
+ i = find_next_bit((unsigned long *)ha->vp_idx_map,
+ MAX_MULTI_ID_FABRIC + 1, 1);
+ for (;i <= MAX_MULTI_ID_FABRIC;
+ i = find_next_bit((unsigned long *)ha->vp_idx_map,
+ MAX_MULTI_ID_FABRIC + 1, i + 1)) {
+ vp_idx_matched = 0;
+
+ list_for_each_entry(vha, &ha->vp_list, vp_list) {
+ if (i == vha->vp_idx) {
+ vp_idx_matched = 1;
+ break;
+ }
+ }
+
+ if (vp_idx_matched) {
+ switch (mb[0]) {
+ case MBA_LIP_OCCURRED:
+ case MBA_LOOP_UP:
+ case MBA_LOOP_DOWN:
+ case MBA_LIP_RESET:
+ case MBA_POINT_TO_POINT:
+ case MBA_CHG_IN_CONNECTION:
+ case MBA_PORT_UPDATE:
+ case MBA_RSCN_UPDATE:
+ DEBUG15(printk("scsi(%ld)%s: Async_event for"
+ " VP[%d], mb = 0x%x, vha=%p\n",
+ vha->host_no, __func__,i, *mb, vha));
+ qla2x00_async_event(vha, mb);
+ break;
+ }
+ }
+ }
+}
+
+void
+qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
+{
+ /*
+ * Physical port will do most of the abort and recovery work. We can
+ * just treat it as a loop down
+ */
+ if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
+ atomic_set(&vha->loop_state, LOOP_DOWN);
+ qla2x00_mark_all_devices_lost(vha, 0);
+ } else {
+ if (!atomic_read(&vha->loop_down_timer))
+ atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
+ }
+
+ DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
+ vha->host_no, vha->vp_idx));
+ qla24xx_enable_vp(vha);
+}
+
+int
+qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
+{
+ if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
+ /* VP acquired. complete port configuration */
+ qla24xx_configure_vp(vha);
+ return 0;
+ }
+
+ if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
+ qla2x00_vp_abort_isp(vha);
+
+ if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
+ (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
+ clear_bit(RESET_ACTIVE, &vha->dpc_flags);
+ }
+
+ if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
+ if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
+ qla2x00_loop_resync(vha);
+ clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
+ }
+ }
+
+ return 0;
+}
+
+void
+qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
+{
+ int ret;
+ int i, vp_idx_matched;
+ scsi_qla_host_t *vha;
+
+ if (ha->parent)
+ return;
+ if (list_empty(&ha->vp_list))
+ return;
+
+ clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
+
+ i = find_next_bit((unsigned long *)ha->vp_idx_map,
+ MAX_MULTI_ID_FABRIC + 1, 1);
+ for (;i <= MAX_MULTI_ID_FABRIC;
+ i = find_next_bit((unsigned long *)ha->vp_idx_map,
+ MAX_MULTI_ID_FABRIC + 1, i + 1)) {
+ vp_idx_matched = 0;
+
+ list_for_each_entry(vha, &ha->vp_list, vp_list) {
+ if (i == vha->vp_idx) {
+ vp_idx_matched = 1;
+ break;
+ }
+ }
+
+ if (vp_idx_matched)
+ ret = qla2x00_do_dpc_vp(vha);
+ }
+}
+
+int
+qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
+{
+ scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
+ scsi_qla_host_t *vha;
+ uint8_t port_name[WWN_SIZE];
+
+ if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
+ return VPCERR_UNSUPPORTED;
+
+ /* Check up the F/W and H/W support NPIV */
+ if (!ha->flags.npiv_supported)
+ return VPCERR_UNSUPPORTED;
+
+ /* Check up whether npiv supported switch presented */
+ if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
+ return VPCERR_NO_FABRIC_SUPP;
+
+ /* Check up unique WWPN */
+ u64_to_wwn(fc_vport->port_name, port_name);
+ vha = qla24xx_find_vhost_by_name(ha, port_name);
+ if (vha)
+ return VPCERR_BAD_WWN;
+
+ /* Check up max-npiv-supports */
+ if (ha->num_vhosts > ha->max_npiv_vports) {
+ DEBUG15(printk("scsi(%ld): num_vhosts %d is bigger than "
+ "max_npv_vports %d.\n", ha->host_no,
+ (uint16_t) ha->num_vhosts, (int) ha->max_npiv_vports));
+ return VPCERR_UNSUPPORTED;
+ }
+ return 0;
+}
+
+scsi_qla_host_t *
+qla24xx_create_vhost(struct fc_vport *fc_vport)
+{
+ scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
+ scsi_qla_host_t *vha;
+ struct Scsi_Host *host;
+
+ host = scsi_host_alloc(&qla24xx_driver_template,
+ sizeof(scsi_qla_host_t));
+ if (!host) {
+ printk(KERN_WARNING
+ "qla2xxx: scsi_host_alloc() failed for vport\n");
+ return(NULL);
+ }
+
+ vha = (scsi_qla_host_t *)host->hostdata;
+
+ /* clone the parent hba */
+ memcpy(vha, ha, sizeof (scsi_qla_host_t));
+
+ fc_vport->dd_data = vha;
+
+ vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
+ if (!vha->node_name)
+ goto create_vhost_failed_1;
+
+ vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
+ if (!vha->port_name)
+ goto create_vhost_failed_2;
+
+ /* New host info */
+ u64_to_wwn(fc_vport->node_name, vha->node_name);
+ u64_to_wwn(fc_vport->port_name, vha->port_name);
+
+ vha->host = host;
+ vha->host_no = host->host_no;
+ vha->parent = ha;
+ vha->fc_vport = fc_vport;
+ vha->device_flags = 0;
+ vha->instance = num_hosts;
+ vha->vp_idx = qla24xx_allocate_vp_id(vha);
+ if (vha->vp_idx > ha->max_npiv_vports) {
+ DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
+ vha->host_no));
+ goto create_vhost_failed_3;
+ }
+ vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
+
+ init_MUTEX(&vha->mbx_cmd_sem);
+ init_MUTEX_LOCKED(&vha->mbx_intr_sem);
+
+ INIT_LIST_HEAD(&vha->list);
+ INIT_LIST_HEAD(&vha->fcports);
+ INIT_LIST_HEAD(&vha->vp_fcports);
+
+ vha->dpc_flags = 0L;
+ set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
+ set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
+
+ /*
+ * To fix the issue of processing a parent's RSCN for the vport before
+ * its SCR is complete.
+ */
+ set_bit(VP_SCR_NEEDED, &vha->vp_flags);
+ atomic_set(&vha->loop_state, LOOP_DOWN);
+ atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
+
+ qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
+
+ host->can_queue = vha->request_q_length + 128;
+ host->this_id = 255;
+ host->cmd_per_lun = 3;
+ host->max_cmd_len = MAX_CMDSZ;
+ host->max_channel = MAX_BUSES - 1;
+ host->max_lun = MAX_LUNS;
+ host->unique_id = vha->instance;
+ host->max_id = MAX_TARGETS_2200;
+ host->transportt = qla2xxx_transport_vport_template;
+
+ DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
+ vha->host_no, vha));
+
+ vha->flags.init_done = 1;
+ num_hosts++;
+
+ down(&ha->vport_sem);
+ set_bit(vha->vp_idx, (unsigned long *)ha->vp_idx_map);
+ ha->cur_vport_count++;
+ up(&ha->vport_sem);
+
+ return vha;
+
+create_vhost_failed_3:
+ kfree(vha->port_name);
+
+create_vhost_failed_2:
+ kfree(vha->node_name);
+
+create_vhost_failed_1:
+ return NULL;
+}