drivers/scsi/qla2xxx/qla_mid.c

   1 /*
   2  *                  QLOGIC LINUX SOFTWARE
   3  *
   4  * QLogic ISP2x00 device driver for Linux 2.6.x
   5  * Copyright (C) 2003-2005 QLogic Corporation
   6  * (www.qlogic.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  */
  19 #include "qla_def.h"
  20
  21 #include <linux/version.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/vmalloc.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/list.h>
  26
  27 #include <scsi/scsi_tcq.h>
  28 #include <scsi/scsicam.h>
  29 #include <linux/delay.h>
  30
  31 void qla2x00_vp_stop_timer(scsi_qla_host_t *);
  32
  33 void
  34 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
  35 {
  36         if (vha->parent && vha->timer_active) {
  37                 del_timer_sync(&vha->timer);
  38                 vha->timer_active = 0;
  39         }
  40 }
  41
  42 uint32_t
  43 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
  44 {
  45         uint32_t vp_id;
  46         scsi_qla_host_t *ha = vha->parent;
  47
  48         /* Find an empty slot and assign an vp_id */
  49         down(&ha->vport_sem);
  50         vp_id = find_first_zero_bit((unsigned long *)ha->vp_idx_map,
  51                                 MAX_MULTI_ID_FABRIC);
  52         if (vp_id > MAX_MULTI_ID_FABRIC) {
  53                 DEBUG15(printk ("vp_id %d is bigger than MAX_MULTI_ID_FABRID\n",
  54                     vp_id));
  55                 up(&ha->vport_sem);
  56                 return vp_id;
  57         }
  58
  59         set_bit(vp_id, (unsigned long *)ha->vp_idx_map);
  60         ha->num_vhosts++;
  61         vha->vp_idx = vp_id;
  62         list_add_tail(&vha->vp_list, &ha->vp_list);
  63         up(&ha->vport_sem);
  64         return vp_id;
  65 }
  66
  67 void
  68 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  69 {
  70         uint16_t vp_id;
  71         scsi_qla_host_t *ha = vha->parent;
  72
  73         down(&ha->vport_sem);
  74         vp_id = vha->vp_idx;
  75         ha->num_vhosts--;
  76         clear_bit(vp_id, (unsigned long *)ha->vp_idx_map);
  77         list_del(&vha->vp_list);
  78         up(&ha->vport_sem);
  79 }
  80
  81 scsi_qla_host_t *
  82 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
  83 {
  84         scsi_qla_host_t *vha;
  85
  86         /* Locate matching device in database. */
  87         list_for_each_entry(vha, &ha->vp_list, vp_list) {
  88                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
  89                         return vha;
  90         }
  91         return NULL;
  92 }
  93
  94 /*
  95  * qla2x00_mark_vp_devices_dead
  96  *      Updates fcport state when device goes offline.
  97  *
  98  * Input:
  99  *      ha = adapter block pointer.
 100  *      fcport = port structure pointer.
 101  *
 102  * Return:
 103  *      None.
 104  *
 105  * Context:
 106  */
 107 void
 108 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
 109 {
 110         fc_port_t *fcport;
 111         scsi_qla_host_t *pha = to_qla_parent(vha);
 112
 113         list_for_each_entry(fcport, &pha->fcports, list) {
 114                 if (fcport->vp_idx != vha->vp_idx)
 115                         continue;
 116
 117                 DEBUG15(printk("scsi(%ld): Marking port dead, "
 118                     "loop_id=0x%04x :%x\n",
 119                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 120
 121                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
 122                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 123         }
 124 }
 125
 126 int
 127 qla24xx_disable_vp(scsi_qla_host_t *vha)
 128 {
 129         int ret;
 130
 131         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 132         atomic_set(&vha->loop_state, LOOP_DOWN);
 133         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 134
 135         /* Delete all vp's fcports from parent's list */
 136         qla2x00_mark_vp_devices_dead(vha);
 137         atomic_set(&vha->vp_state, VP_FAILED);
 138         vha->flags.management_server_logged_in = 0;
 139         if (ret == QLA_SUCCESS) {
 140                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 141         } else {
 142                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 143                 return -1;
 144         }
 145         return 0;
 146 }
 147
 148 int
 149 qla24xx_enable_vp(scsi_qla_host_t *vha)
 150 {
 151         int ret;
 152         scsi_qla_host_t *ha = vha->parent;
 153
 154         /* Check if physical ha port is Up */
 155         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
 156                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
 157                 vha->vp_err_state =  VP_ERR_PORTDWN;
 158                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 159                 goto enable_failed;
 160         }
 161
 162         /* Initialize the new vport unless it is a persistent port */
 163         down(&ha->vport_sem);
 164         ret = qla24xx_modify_vp_config(vha);
 165         up(&ha->vport_sem);
 166
 167         if (ret != QLA_SUCCESS) {
 168                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 169                 goto enable_failed;
 170         }
 171
 172         DEBUG15(qla_printk(KERN_INFO, ha,
 173             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 174         return 0;
 175
 176 enable_failed:
 177         DEBUG15(qla_printk(KERN_INFO, ha,
 178             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 179         return 1;
 180 }
 181
 182 /**
 183  * qla24xx_modify_vport() -  Modifies the virtual fabric port's configuration
 184  * @ha: HA context
 185  * @vp: pointer to buffer of virtual port parameters.
 186  * @ret_code: return error code:
 187  *
 188  * Returns the virtual port id, or MAX_VSAN_ID, if couldn't create.
 189  */
 190 uint32_t
 191 qla24xx_modify_vhba(scsi_qla_host_t *ha, vport_params_t *vp, uint32_t *vp_id)
 192 {
 193         scsi_qla_host_t *vha;
 194
 195         vha = qla24xx_find_vhost_by_name(ha, vp->port_name);
 196         if (!vha) {
 197                 *vp_id = MAX_NUM_VPORT_LOOP;
 198                 return VP_RET_CODE_WWPN;
 199         }
 200
 201         if (qla24xx_enable_vp(vha)) {
 202                 scsi_host_put(vha->host);
 203                 qla2x00_mem_free(vha);
 204                 *vp_id = MAX_NUM_VPORT_LOOP;
 205                 return VP_RET_CODE_RESOURCES;
 206         }
 207
 208         *vp_id = vha->vp_idx;
 209         return VP_RET_CODE_OK;
 210 }
 211
 212 void
 213 qla24xx_configure_vp(scsi_qla_host_t *vha)
 214 {
 215         struct fc_vport *fc_vport;
 216         int ret;
 217
 218         fc_vport = vha->fc_vport;
 219
 220         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 221             vha->host_no, __func__));
 222         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 223         if (ret != QLA_SUCCESS) {
 224                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
 225                     " of RSCN requests: 0x%x\n", ret));
 226                 return;
 227         } else {
 228                 /* Corresponds to SCR enabled */
 229                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 230         }
 231
 232         vha->flags.online = 1;
 233         if (qla24xx_configure_vhba(vha))
 234                 return;
 235
 236         atomic_set(&vha->vp_state, VP_ACTIVE);
 237         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 238 }
 239
 240 void
 241 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
 242 {
 243         int i, vp_idx_matched;
 244         scsi_qla_host_t *vha;
 245
 246         if (ha->parent)
 247                 return;
 248
 249         i = find_next_bit((unsigned long *)ha->vp_idx_map,
 250             MAX_MULTI_ID_FABRIC + 1, 1);
 251         for (;i <= MAX_MULTI_ID_FABRIC;
 252             i = find_next_bit((unsigned long *)ha->vp_idx_map,
 253             MAX_MULTI_ID_FABRIC + 1, i + 1)) {
 254                 vp_idx_matched = 0;
 255
 256                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 257                         if (i == vha->vp_idx) {
 258                                 vp_idx_matched = 1;
 259                                 break;
 260                         }
 261                 }
 262
 263                 if (vp_idx_matched) {
 264                         switch (mb[0]) {
 265                         case MBA_LIP_OCCURRED:
 266                         case MBA_LOOP_UP:
 267                         case MBA_LOOP_DOWN:
 268                         case MBA_LIP_RESET:
 269                         case MBA_POINT_TO_POINT:
 270                         case MBA_CHG_IN_CONNECTION:
 271                         case MBA_PORT_UPDATE:
 272                         case MBA_RSCN_UPDATE:
 273                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 274                                     " VP[%d], mb = 0x%x, vha=%p\n",
 275                                     vha->host_no, __func__,i, *mb, vha));
 276                                 qla2x00_async_event(vha, mb);
 277                                 break;
 278                         }
 279                 }
 280         }
 281 }
 282
 283 void
 284 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 285 {
 286         /*
 287          * Physical port will do most of the abort and recovery work. We can
 288          * just treat it as a loop down
 289          */
 290         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 291                 atomic_set(&vha->loop_state, LOOP_DOWN);
 292                 qla2x00_mark_all_devices_lost(vha, 0);
 293         } else {
 294                 if (!atomic_read(&vha->loop_down_timer))
 295                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 296         }
 297
 298         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 299             vha->host_no, vha->vp_idx));
 300         qla24xx_enable_vp(vha);
 301 }
 302
 303 int
 304 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 305 {
 306         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 307                 /* VP acquired. complete port configuration */
 308                 qla24xx_configure_vp(vha);
 309                 return 0;
 310         }
 311
 312         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
 313                 qla2x00_vp_abort_isp(vha);
 314
 315         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 316             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 317                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 318         }
 319
 320         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 321                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 322                         qla2x00_loop_resync(vha);
 323                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 324                 }
 325         }
 326
 327         return 0;
 328 }
 329
 330 void
 331 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 332 {
 333         int ret;
 334         int i, vp_idx_matched;
 335         scsi_qla_host_t *vha;
 336
 337         if (ha->parent)
 338                 return;
 339         if (list_empty(&ha->vp_list))
 340                 return;
 341
 342         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 343
 344         i = find_next_bit((unsigned long *)ha->vp_idx_map,
 345             MAX_MULTI_ID_FABRIC + 1, 1);
 346         for (;i <= MAX_MULTI_ID_FABRIC;
 347             i = find_next_bit((unsigned long *)ha->vp_idx_map,
 348             MAX_MULTI_ID_FABRIC + 1, i + 1)) {
 349                 vp_idx_matched = 0;
 350
 351                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 352                         if (i == vha->vp_idx) {
 353                                 vp_idx_matched = 1;
 354                                 break;
 355                         }
 356                 }
 357
 358                 if (vp_idx_matched)
 359                         ret = qla2x00_do_dpc_vp(vha);
 360         }
 361 }
 362
 363 int
 364 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 365 {
 366         scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
 367         scsi_qla_host_t *vha;
 368         uint8_t port_name[WWN_SIZE];
 369
 370         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 371                 return VPCERR_UNSUPPORTED;
 372
 373         /* Check up the F/W and H/W support NPIV */
 374         if (!ha->flags.npiv_supported)
 375                 return VPCERR_UNSUPPORTED;
 376
 377         /* Check up whether npiv supported switch presented */
 378         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 379                 return VPCERR_NO_FABRIC_SUPP;
 380
 381         /* Check up unique WWPN */
 382         u64_to_wwn(fc_vport->port_name, port_name);
 383         vha = qla24xx_find_vhost_by_name(ha, port_name);
 384         if (vha)
 385                 return VPCERR_BAD_WWN;
 386
 387         /* Check up max-npiv-supports */
 388         if (ha->num_vhosts > ha->max_npiv_vports) {
 389                 DEBUG15(printk("scsi(%ld): num_vhosts %d is bigger than "
 390                     "max_npv_vports %d.\n", ha->host_no,
 391                     (uint16_t) ha->num_vhosts, (int) ha->max_npiv_vports));
 392                 return VPCERR_UNSUPPORTED;
 393         }
 394         return 0;
 395 }
 396
 397 scsi_qla_host_t *
 398 qla24xx_create_vhost(struct fc_vport *fc_vport)
 399 {
 400         scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
 401         scsi_qla_host_t *vha;
 402         struct Scsi_Host *host;
 403
 404         host = scsi_host_alloc(&qla24xx_driver_template,
 405             sizeof(scsi_qla_host_t));
 406         if (!host) {
 407                 printk(KERN_WARNING
 408                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 409                 return(NULL);
 410         }
 411
 412         vha = (scsi_qla_host_t *)host->hostdata;
 413
 414         /* clone the parent hba */
 415         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 416
 417         fc_vport->dd_data = vha;
 418
 419         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 420         if (!vha->node_name)
 421                 goto create_vhost_failed_1;
 422
 423         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 424         if (!vha->port_name)
 425                 goto create_vhost_failed_2;
 426
 427         /* New host info */
 428         u64_to_wwn(fc_vport->node_name, vha->node_name);
 429         u64_to_wwn(fc_vport->port_name, vha->port_name);
 430
 431         vha->host = host;
 432         vha->host_no = host->host_no;
 433         vha->parent = ha;
 434         vha->fc_vport = fc_vport;
 435         vha->device_flags = 0;
 436         vha->instance = num_hosts;
 437         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 438         if (vha->vp_idx > ha->max_npiv_vports) {
 439                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 440                         vha->host_no));
 441                 goto create_vhost_failed_3;
 442         }
 443         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 444
 445         init_MUTEX(&vha->mbx_cmd_sem);
 446         init_MUTEX_LOCKED(&vha->mbx_intr_sem);
 447
 448         INIT_LIST_HEAD(&vha->list);
 449         INIT_LIST_HEAD(&vha->fcports);
 450         INIT_LIST_HEAD(&vha->vp_fcports);
 451
 452         vha->dpc_flags = 0L;
 453         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 454         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 455
 456         /*
 457          * To fix the issue of processing a parent's RSCN for the vport before
 458          * its SCR is complete.
 459          */
 460         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 461         atomic_set(&vha->loop_state, LOOP_DOWN);
 462         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 463
 464         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 465
 466         host->can_queue = vha->request_q_length + 128;
 467         host->this_id = 255;
 468         host->cmd_per_lun = 3;
 469         host->max_cmd_len = MAX_CMDSZ;
 470         host->max_channel = MAX_BUSES - 1;
 471         host->max_lun = MAX_LUNS;
 472         host->unique_id = vha->instance;
 473         host->max_id = MAX_TARGETS_2200;
 474         host->transportt = qla2xxx_transport_vport_template;
 475
 476         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 477             vha->host_no, vha));
 478
 479         vha->flags.init_done = 1;
 480         num_hosts++;
 481
 482         down(&ha->vport_sem);
 483         set_bit(vha->vp_idx, (unsigned long *)ha->vp_idx_map);
 484         ha->cur_vport_count++;
 485         up(&ha->vport_sem);
 486
 487         return vha;
 488
 489 create_vhost_failed_3:
 490         kfree(vha->port_name);
 491
 492 create_vhost_failed_2:
 493         kfree(vha->node_name);
 494
 495 create_vhost_failed_1:
 496         return NULL;
 497 }