git.oblomov.eu Git - linux-2.6/blob - 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 static 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 static void
 183 qla24xx_configure_vp(scsi_qla_host_t *vha)
 184 {
 185         struct fc_vport *fc_vport;
 186         int ret;
 187
 188         fc_vport = vha->fc_vport;
 189
 190         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 191             vha->host_no, __func__));
 192         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 193         if (ret != QLA_SUCCESS) {
 194                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
 195                     " of RSCN requests: 0x%x\n", ret));
 196                 return;
 197         } else {
 198                 /* Corresponds to SCR enabled */
 199                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 200         }
 201
 202         vha->flags.online = 1;
 203         if (qla24xx_configure_vhba(vha))
 204                 return;
 205
 206         atomic_set(&vha->vp_state, VP_ACTIVE);
 207         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 208 }
 209
 210 void
 211 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
 212 {
 213         int i, vp_idx_matched;
 214         scsi_qla_host_t *vha;
 215
 216         if (ha->parent)
 217                 return;
 218
 219         i = find_next_bit((unsigned long *)ha->vp_idx_map,
 220             MAX_MULTI_ID_FABRIC + 1, 1);
 221         for (;i <= MAX_MULTI_ID_FABRIC;
 222             i = find_next_bit((unsigned long *)ha->vp_idx_map,
 223             MAX_MULTI_ID_FABRIC + 1, i + 1)) {
 224                 vp_idx_matched = 0;
 225
 226                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 227                         if (i == vha->vp_idx) {
 228                                 vp_idx_matched = 1;
 229                                 break;
 230                         }
 231                 }
 232
 233                 if (vp_idx_matched) {
 234                         switch (mb[0]) {
 235                         case MBA_LIP_OCCURRED:
 236                         case MBA_LOOP_UP:
 237                         case MBA_LOOP_DOWN:
 238                         case MBA_LIP_RESET:
 239                         case MBA_POINT_TO_POINT:
 240                         case MBA_CHG_IN_CONNECTION:
 241                         case MBA_PORT_UPDATE:
 242                         case MBA_RSCN_UPDATE:
 243                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 244                                     " VP[%d], mb = 0x%x, vha=%p\n",
 245                                     vha->host_no, __func__,i, *mb, vha));
 246                                 qla2x00_async_event(vha, mb);
 247                                 break;
 248                         }
 249                 }
 250         }
 251 }
 252
 253 void
 254 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 255 {
 256         /*
 257          * Physical port will do most of the abort and recovery work. We can
 258          * just treat it as a loop down
 259          */
 260         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 261                 atomic_set(&vha->loop_state, LOOP_DOWN);
 262                 qla2x00_mark_all_devices_lost(vha, 0);
 263         } else {
 264                 if (!atomic_read(&vha->loop_down_timer))
 265                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 266         }
 267
 268         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 269             vha->host_no, vha->vp_idx));
 270         qla24xx_enable_vp(vha);
 271 }
 272
 273 int
 274 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 275 {
 276         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 277                 /* VP acquired. complete port configuration */
 278                 qla24xx_configure_vp(vha);
 279                 return 0;
 280         }
 281
 282         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
 283                 qla2x00_vp_abort_isp(vha);
 284
 285         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 286             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 287                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 288         }
 289
 290         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 291                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 292                         qla2x00_loop_resync(vha);
 293                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 294                 }
 295         }
 296
 297         return 0;
 298 }
 299
 300 void
 301 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 302 {
 303         int ret;
 304         int i, vp_idx_matched;
 305         scsi_qla_host_t *vha;
 306
 307         if (ha->parent)
 308                 return;
 309         if (list_empty(&ha->vp_list))
 310                 return;
 311
 312         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 313
 314         i = find_next_bit((unsigned long *)ha->vp_idx_map,
 315             MAX_MULTI_ID_FABRIC + 1, 1);
 316         for (;i <= MAX_MULTI_ID_FABRIC;
 317             i = find_next_bit((unsigned long *)ha->vp_idx_map,
 318             MAX_MULTI_ID_FABRIC + 1, i + 1)) {
 319                 vp_idx_matched = 0;
 320
 321                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 322                         if (i == vha->vp_idx) {
 323                                 vp_idx_matched = 1;
 324                                 break;
 325                         }
 326                 }
 327
 328                 if (vp_idx_matched)
 329                         ret = qla2x00_do_dpc_vp(vha);
 330         }
 331 }
 332
 333 int
 334 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 335 {
 336         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 337         scsi_qla_host_t *vha;
 338         uint8_t port_name[WWN_SIZE];
 339
 340         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 341                 return VPCERR_UNSUPPORTED;
 342
 343         /* Check up the F/W and H/W support NPIV */
 344         if (!ha->flags.npiv_supported)
 345                 return VPCERR_UNSUPPORTED;
 346
 347         /* Check up whether npiv supported switch presented */
 348         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 349                 return VPCERR_NO_FABRIC_SUPP;
 350
 351         /* Check up unique WWPN */
 352         u64_to_wwn(fc_vport->port_name, port_name);
 353         vha = qla24xx_find_vhost_by_name(ha, port_name);
 354         if (vha)
 355                 return VPCERR_BAD_WWN;
 356
 357         /* Check up max-npiv-supports */
 358         if (ha->num_vhosts > ha->max_npiv_vports) {
 359                 DEBUG15(printk("scsi(%ld): num_vhosts %d is bigger than "
 360                     "max_npv_vports %d.\n", ha->host_no,
 361                     (uint16_t) ha->num_vhosts, (int) ha->max_npiv_vports));
 362                 return VPCERR_UNSUPPORTED;
 363         }
 364         return 0;
 365 }
 366
 367 scsi_qla_host_t *
 368 qla24xx_create_vhost(struct fc_vport *fc_vport)
 369 {
 370         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 371         scsi_qla_host_t *vha;
 372         struct Scsi_Host *host;
 373
 374         host = scsi_host_alloc(&qla24xx_driver_template,
 375             sizeof(scsi_qla_host_t));
 376         if (!host) {
 377                 printk(KERN_WARNING
 378                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 379                 return(NULL);
 380         }
 381
 382         vha = shost_priv(host);
 383
 384         /* clone the parent hba */
 385         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 386
 387         fc_vport->dd_data = vha;
 388
 389         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 390         if (!vha->node_name)
 391                 goto create_vhost_failed_1;
 392
 393         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 394         if (!vha->port_name)
 395                 goto create_vhost_failed_2;
 396
 397         /* New host info */
 398         u64_to_wwn(fc_vport->node_name, vha->node_name);
 399         u64_to_wwn(fc_vport->port_name, vha->port_name);
 400
 401         vha->host = host;
 402         vha->host_no = host->host_no;
 403         vha->parent = ha;
 404         vha->fc_vport = fc_vport;
 405         vha->device_flags = 0;
 406         vha->instance = num_hosts;
 407         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 408         if (vha->vp_idx > ha->max_npiv_vports) {
 409                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 410                         vha->host_no));
 411                 goto create_vhost_failed_3;
 412         }
 413         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 414
 415         init_MUTEX(&vha->mbx_cmd_sem);
 416         init_MUTEX_LOCKED(&vha->mbx_intr_sem);
 417
 418         INIT_LIST_HEAD(&vha->list);
 419         INIT_LIST_HEAD(&vha->fcports);
 420         INIT_LIST_HEAD(&vha->vp_fcports);
 421
 422         vha->dpc_flags = 0L;
 423         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 424         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 425
 426         /*
 427          * To fix the issue of processing a parent's RSCN for the vport before
 428          * its SCR is complete.
 429          */
 430         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 431         atomic_set(&vha->loop_state, LOOP_DOWN);
 432         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 433
 434         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 435
 436         host->can_queue = vha->request_q_length + 128;
 437         host->this_id = 255;
 438         host->cmd_per_lun = 3;
 439         host->max_cmd_len = MAX_CMDSZ;
 440         host->max_channel = MAX_BUSES - 1;
 441         host->max_lun = MAX_LUNS;
 442         host->unique_id = vha->instance;
 443         host->max_id = MAX_TARGETS_2200;
 444         host->transportt = qla2xxx_transport_vport_template;
 445
 446         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 447             vha->host_no, vha));
 448
 449         vha->flags.init_done = 1;
 450         num_hosts++;
 451
 452         down(&ha->vport_sem);
 453         set_bit(vha->vp_idx, (unsigned long *)ha->vp_idx_map);
 454         ha->cur_vport_count++;
 455         up(&ha->vport_sem);
 456
 457         return vha;
 458
 459 create_vhost_failed_3:
 460         kfree(vha->port_name);
 461
 462 create_vhost_failed_2:
 463         kfree(vha->node_name);
 464
 465 create_vhost_failed_1:
 466         return NULL;
 467 }