drivers/scsi/qla2xxx/qla_mid.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/version.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/vmalloc.h>
  12 #include <linux/smp_lock.h>
  13 #include <linux/list.h>
  14
  15 #include <scsi/scsi_tcq.h>
  16 #include <scsi/scsicam.h>
  17 #include <linux/delay.h>
  18
  19 void
  20 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
  21 {
  22         if (vha->parent && vha->timer_active) {
  23                 del_timer_sync(&vha->timer);
  24                 vha->timer_active = 0;
  25         }
  26 }
  27
  28 static uint32_t
  29 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
  30 {
  31         uint32_t vp_id;
  32         scsi_qla_host_t *ha = vha->parent;
  33
  34         /* Find an empty slot and assign an vp_id */
  35         mutex_lock(&ha->vport_lock);
  36         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
  37         if (vp_id > ha->max_npiv_vports) {
  38                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
  39                     vp_id, ha->max_npiv_vports));
  40                 mutex_unlock(&ha->vport_lock);
  41                 return vp_id;
  42         }
  43
  44         set_bit(vp_id, ha->vp_idx_map);
  45         ha->num_vhosts++;
  46         ha->cur_vport_count++;
  47         vha->vp_idx = vp_id;
  48         list_add_tail(&vha->vp_list, &ha->vp_list);
  49         mutex_unlock(&ha->vport_lock);
  50         return vp_id;
  51 }
  52
  53 void
  54 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  55 {
  56         uint16_t vp_id;
  57         scsi_qla_host_t *ha = vha->parent;
  58
  59         mutex_lock(&ha->vport_lock);
  60         vp_id = vha->vp_idx;
  61         ha->num_vhosts--;
  62         ha->cur_vport_count--;
  63         clear_bit(vp_id, ha->vp_idx_map);
  64         list_del(&vha->vp_list);
  65         mutex_unlock(&ha->vport_lock);
  66 }
  67
  68 static scsi_qla_host_t *
  69 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
  70 {
  71         scsi_qla_host_t *vha;
  72
  73         /* Locate matching device in database. */
  74         list_for_each_entry(vha, &ha->vp_list, vp_list) {
  75                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
  76                         return vha;
  77         }
  78         return NULL;
  79 }
  80
  81 /*
  82  * qla2x00_mark_vp_devices_dead
  83  *      Updates fcport state when device goes offline.
  84  *
  85  * Input:
  86  *      ha = adapter block pointer.
  87  *      fcport = port structure pointer.
  88  *
  89  * Return:
  90  *      None.
  91  *
  92  * Context:
  93  */
  94 static void
  95 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
  96 {
  97         fc_port_t *fcport;
  98         scsi_qla_host_t *pha = to_qla_parent(vha);
  99
 100         list_for_each_entry(fcport, &pha->fcports, list) {
 101                 if (fcport->vp_idx != vha->vp_idx)
 102                         continue;
 103
 104                 DEBUG15(printk("scsi(%ld): Marking port dead, "
 105                     "loop_id=0x%04x :%x\n",
 106                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 107
 108                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 109                 atomic_set(&fcport->state, FCS_UNCONFIGURED);
 110         }
 111 }
 112
 113 int
 114 qla24xx_disable_vp(scsi_qla_host_t *vha)
 115 {
 116         int ret;
 117
 118         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 119         atomic_set(&vha->loop_state, LOOP_DOWN);
 120         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 121
 122         /* Delete all vp's fcports from parent's list */
 123         qla2x00_mark_vp_devices_dead(vha);
 124         atomic_set(&vha->vp_state, VP_FAILED);
 125         vha->flags.management_server_logged_in = 0;
 126         if (ret == QLA_SUCCESS) {
 127                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 128         } else {
 129                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 130                 return -1;
 131         }
 132         return 0;
 133 }
 134
 135 int
 136 qla24xx_enable_vp(scsi_qla_host_t *vha)
 137 {
 138         int ret;
 139         scsi_qla_host_t *ha = vha->parent;
 140
 141         /* Check if physical ha port is Up */
 142         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
 143                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
 144                 vha->vp_err_state =  VP_ERR_PORTDWN;
 145                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 146                 goto enable_failed;
 147         }
 148
 149         /* Initialize the new vport unless it is a persistent port */
 150         mutex_lock(&ha->vport_lock);
 151         ret = qla24xx_modify_vp_config(vha);
 152         mutex_unlock(&ha->vport_lock);
 153
 154         if (ret != QLA_SUCCESS) {
 155                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 156                 goto enable_failed;
 157         }
 158
 159         DEBUG15(qla_printk(KERN_INFO, ha,
 160             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 161         return 0;
 162
 163 enable_failed:
 164         DEBUG15(qla_printk(KERN_INFO, ha,
 165             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 166         return 1;
 167 }
 168
 169 static void
 170 qla24xx_configure_vp(scsi_qla_host_t *vha)
 171 {
 172         struct fc_vport *fc_vport;
 173         int ret;
 174
 175         fc_vport = vha->fc_vport;
 176
 177         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 178             vha->host_no, __func__));
 179         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 180         if (ret != QLA_SUCCESS) {
 181                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
 182                     " of RSCN requests: 0x%x\n", ret));
 183                 return;
 184         } else {
 185                 /* Corresponds to SCR enabled */
 186                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 187         }
 188
 189         vha->flags.online = 1;
 190         if (qla24xx_configure_vhba(vha))
 191                 return;
 192
 193         atomic_set(&vha->vp_state, VP_ACTIVE);
 194         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 195 }
 196
 197 void
 198 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
 199 {
 200         int i, vp_idx_matched;
 201         scsi_qla_host_t *vha;
 202
 203         if (ha->parent)
 204                 return;
 205
 206         for_each_mapped_vp_idx(ha, i) {
 207                 vp_idx_matched = 0;
 208
 209                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 210                         if (i == vha->vp_idx) {
 211                                 vp_idx_matched = 1;
 212                                 break;
 213                         }
 214                 }
 215
 216                 if (vp_idx_matched) {
 217                         switch (mb[0]) {
 218                         case MBA_LIP_OCCURRED:
 219                         case MBA_LOOP_UP:
 220                         case MBA_LOOP_DOWN:
 221                         case MBA_LIP_RESET:
 222                         case MBA_POINT_TO_POINT:
 223                         case MBA_CHG_IN_CONNECTION:
 224                         case MBA_PORT_UPDATE:
 225                         case MBA_RSCN_UPDATE:
 226                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 227                                     " VP[%d], mb = 0x%x, vha=%p\n",
 228                                     vha->host_no, __func__,i, *mb, vha));
 229                                 qla2x00_async_event(vha, mb);
 230                                 break;
 231                         }
 232                 }
 233         }
 234 }
 235
 236 void
 237 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 238 {
 239         /*
 240          * Physical port will do most of the abort and recovery work. We can
 241          * just treat it as a loop down
 242          */
 243         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 244                 atomic_set(&vha->loop_state, LOOP_DOWN);
 245                 qla2x00_mark_all_devices_lost(vha, 0);
 246         } else {
 247                 if (!atomic_read(&vha->loop_down_timer))
 248                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 249         }
 250
 251         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 252             vha->host_no, vha->vp_idx));
 253         qla24xx_enable_vp(vha);
 254 }
 255
 256 static int
 257 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 258 {
 259         scsi_qla_host_t *ha = vha->parent;
 260
 261         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 262                 /* VP acquired. complete port configuration */
 263                 if (atomic_read(&ha->loop_state) == LOOP_READY) {
 264                         qla24xx_configure_vp(vha);
 265                 } else {
 266                         set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
 267                         set_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 268                 }
 269
 270                 return 0;
 271         }
 272
 273         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
 274                 qla2x00_vp_abort_isp(vha);
 275
 276         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 277             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 278                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 279         }
 280
 281         if (atomic_read(&vha->vp_state) == VP_ACTIVE &&
 282             test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 283                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 284                         qla2x00_loop_resync(vha);
 285                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 286                 }
 287         }
 288
 289         return 0;
 290 }
 291
 292 void
 293 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 294 {
 295         int ret;
 296         int i, vp_idx_matched;
 297         scsi_qla_host_t *vha;
 298
 299         if (ha->parent)
 300                 return;
 301         if (list_empty(&ha->vp_list))
 302                 return;
 303
 304         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 305
 306         for_each_mapped_vp_idx(ha, i) {
 307                 vp_idx_matched = 0;
 308
 309                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 310                         if (i == vha->vp_idx) {
 311                                 vp_idx_matched = 1;
 312                                 break;
 313                         }
 314                 }
 315
 316                 if (vp_idx_matched)
 317                         ret = qla2x00_do_dpc_vp(vha);
 318         }
 319 }
 320
 321 int
 322 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 323 {
 324         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 325         scsi_qla_host_t *vha;
 326         uint8_t port_name[WWN_SIZE];
 327
 328         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 329                 return VPCERR_UNSUPPORTED;
 330
 331         /* Check up the F/W and H/W support NPIV */
 332         if (!ha->flags.npiv_supported)
 333                 return VPCERR_UNSUPPORTED;
 334
 335         /* Check up whether npiv supported switch presented */
 336         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 337                 return VPCERR_NO_FABRIC_SUPP;
 338
 339         /* Check up unique WWPN */
 340         u64_to_wwn(fc_vport->port_name, port_name);
 341         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
 342                 return VPCERR_BAD_WWN;
 343         vha = qla24xx_find_vhost_by_name(ha, port_name);
 344         if (vha)
 345                 return VPCERR_BAD_WWN;
 346
 347         /* Check up max-npiv-supports */
 348         if (ha->num_vhosts > ha->max_npiv_vports) {
 349                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 350                     "max_npv_vports %ud.\n", ha->host_no,
 351                     ha->num_vhosts, ha->max_npiv_vports));
 352                 return VPCERR_UNSUPPORTED;
 353         }
 354         return 0;
 355 }
 356
 357 scsi_qla_host_t *
 358 qla24xx_create_vhost(struct fc_vport *fc_vport)
 359 {
 360         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 361         scsi_qla_host_t *vha;
 362         struct Scsi_Host *host;
 363
 364         host = scsi_host_alloc(&qla24xx_driver_template,
 365             sizeof(scsi_qla_host_t));
 366         if (!host) {
 367                 printk(KERN_WARNING
 368                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 369                 return(NULL);
 370         }
 371
 372         vha = shost_priv(host);
 373
 374         /* clone the parent hba */
 375         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 376
 377         fc_vport->dd_data = vha;
 378
 379         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 380         if (!vha->node_name)
 381                 goto create_vhost_failed_1;
 382
 383         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 384         if (!vha->port_name)
 385                 goto create_vhost_failed_2;
 386
 387         /* New host info */
 388         u64_to_wwn(fc_vport->node_name, vha->node_name);
 389         u64_to_wwn(fc_vport->port_name, vha->port_name);
 390
 391         vha->host = host;
 392         vha->host_no = host->host_no;
 393         vha->parent = ha;
 394         vha->fc_vport = fc_vport;
 395         vha->device_flags = 0;
 396         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 397         if (vha->vp_idx > ha->max_npiv_vports) {
 398                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 399                         vha->host_no));
 400                 goto create_vhost_failed_3;
 401         }
 402         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 403
 404         init_completion(&vha->mbx_cmd_comp);
 405         complete(&vha->mbx_cmd_comp);
 406         init_completion(&vha->mbx_intr_comp);
 407
 408         INIT_LIST_HEAD(&vha->list);
 409         INIT_LIST_HEAD(&vha->fcports);
 410         INIT_LIST_HEAD(&vha->vp_fcports);
 411         INIT_LIST_HEAD(&vha->work_list);
 412
 413         vha->dpc_flags = 0L;
 414         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 415         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 416
 417         /*
 418          * To fix the issue of processing a parent's RSCN for the vport before
 419          * its SCR is complete.
 420          */
 421         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 422         atomic_set(&vha->loop_state, LOOP_DOWN);
 423         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 424
 425         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 426
 427         host->can_queue = vha->request_q_length + 128;
 428         host->this_id = 255;
 429         host->cmd_per_lun = 3;
 430         host->max_cmd_len = MAX_CMDSZ;
 431         host->max_channel = MAX_BUSES - 1;
 432         host->max_lun = MAX_LUNS;
 433         host->unique_id = host->host_no;
 434         host->max_id = MAX_TARGETS_2200;
 435         host->transportt = qla2xxx_transport_vport_template;
 436
 437         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 438             vha->host_no, vha));
 439
 440         vha->flags.init_done = 1;
 441
 442         return vha;
 443
 444 create_vhost_failed_3:
 445         kfree(vha->port_name);
 446
 447 create_vhost_failed_2:
 448         kfree(vha->node_name);
 449
 450 create_vhost_failed_1:
 451         return NULL;
 452 }