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 static 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(ha->vp_idx_map, ha->max_npiv_vports + 1);
  51         if (vp_id > ha->max_npiv_vports) {
  52                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
  53                     vp_id, ha->max_npiv_vports));
  54                 up(&ha->vport_sem);
  55                 return vp_id;
  56         }
  57
  58         set_bit(vp_id, ha->vp_idx_map);
  59         ha->num_vhosts++;
  60         vha->vp_idx = vp_id;
  61         list_add_tail(&vha->vp_list, &ha->vp_list);
  62         up(&ha->vport_sem);
  63         return vp_id;
  64 }
  65
  66 void
  67 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  68 {
  69         uint16_t vp_id;
  70         scsi_qla_host_t *ha = vha->parent;
  71
  72         down(&ha->vport_sem);
  73         vp_id = vha->vp_idx;
  74         ha->num_vhosts--;
  75         clear_bit(vp_id, ha->vp_idx_map);
  76         list_del(&vha->vp_list);
  77         up(&ha->vport_sem);
  78 }
  79
  80 static scsi_qla_host_t *
  81 qla24xx_find_vhost_by_name(scsi_qla_host_t *ha, uint8_t *port_name)
  82 {
  83         scsi_qla_host_t *vha;
  84
  85         /* Locate matching device in database. */
  86         list_for_each_entry(vha, &ha->vp_list, vp_list) {
  87                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
  88                         return vha;
  89         }
  90         return NULL;
  91 }
  92
  93 /*
  94  * qla2x00_mark_vp_devices_dead
  95  *      Updates fcport state when device goes offline.
  96  *
  97  * Input:
  98  *      ha = adapter block pointer.
  99  *      fcport = port structure pointer.
 100  *
 101  * Return:
 102  *      None.
 103  *
 104  * Context:
 105  */
 106 static void
 107 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
 108 {
 109         fc_port_t *fcport;
 110         scsi_qla_host_t *pha = to_qla_parent(vha);
 111
 112         list_for_each_entry(fcport, &pha->fcports, list) {
 113                 if (fcport->vp_idx != vha->vp_idx)
 114                         continue;
 115
 116                 DEBUG15(printk("scsi(%ld): Marking port dead, "
 117                     "loop_id=0x%04x :%x\n",
 118                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 119
 120                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
 121                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 122         }
 123 }
 124
 125 int
 126 qla24xx_disable_vp(scsi_qla_host_t *vha)
 127 {
 128         int ret;
 129
 130         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 131         atomic_set(&vha->loop_state, LOOP_DOWN);
 132         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 133
 134         /* Delete all vp's fcports from parent's list */
 135         qla2x00_mark_vp_devices_dead(vha);
 136         atomic_set(&vha->vp_state, VP_FAILED);
 137         vha->flags.management_server_logged_in = 0;
 138         if (ret == QLA_SUCCESS) {
 139                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 140         } else {
 141                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 142                 return -1;
 143         }
 144         return 0;
 145 }
 146
 147 int
 148 qla24xx_enable_vp(scsi_qla_host_t *vha)
 149 {
 150         int ret;
 151         scsi_qla_host_t *ha = vha->parent;
 152
 153         /* Check if physical ha port is Up */
 154         if (atomic_read(&ha->loop_state) == LOOP_DOWN  ||
 155                 atomic_read(&ha->loop_state) == LOOP_DEAD ) {
 156                 vha->vp_err_state =  VP_ERR_PORTDWN;
 157                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 158                 goto enable_failed;
 159         }
 160
 161         /* Initialize the new vport unless it is a persistent port */
 162         down(&ha->vport_sem);
 163         ret = qla24xx_modify_vp_config(vha);
 164         up(&ha->vport_sem);
 165
 166         if (ret != QLA_SUCCESS) {
 167                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 168                 goto enable_failed;
 169         }
 170
 171         DEBUG15(qla_printk(KERN_INFO, ha,
 172             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 173         return 0;
 174
 175 enable_failed:
 176         DEBUG15(qla_printk(KERN_INFO, ha,
 177             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 178         return 1;
 179 }
 180
 181 static void
 182 qla24xx_configure_vp(scsi_qla_host_t *vha)
 183 {
 184         struct fc_vport *fc_vport;
 185         int ret;
 186
 187         fc_vport = vha->fc_vport;
 188
 189         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 190             vha->host_no, __func__));
 191         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 192         if (ret != QLA_SUCCESS) {
 193                 DEBUG15(qla_printk(KERN_ERR, vha, "Failed to enable receiving"
 194                     " of RSCN requests: 0x%x\n", ret));
 195                 return;
 196         } else {
 197                 /* Corresponds to SCR enabled */
 198                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 199         }
 200
 201         vha->flags.online = 1;
 202         if (qla24xx_configure_vhba(vha))
 203                 return;
 204
 205         atomic_set(&vha->vp_state, VP_ACTIVE);
 206         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 207 }
 208
 209 void
 210 qla2x00_alert_all_vps(scsi_qla_host_t *ha, uint16_t *mb)
 211 {
 212         int i, vp_idx_matched;
 213         scsi_qla_host_t *vha;
 214
 215         if (ha->parent)
 216                 return;
 217
 218         for_each_mapped_vp_idx(ha, i) {
 219                 vp_idx_matched = 0;
 220
 221                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 222                         if (i == vha->vp_idx) {
 223                                 vp_idx_matched = 1;
 224                                 break;
 225                         }
 226                 }
 227
 228                 if (vp_idx_matched) {
 229                         switch (mb[0]) {
 230                         case MBA_LIP_OCCURRED:
 231                         case MBA_LOOP_UP:
 232                         case MBA_LOOP_DOWN:
 233                         case MBA_LIP_RESET:
 234                         case MBA_POINT_TO_POINT:
 235                         case MBA_CHG_IN_CONNECTION:
 236                         case MBA_PORT_UPDATE:
 237                         case MBA_RSCN_UPDATE:
 238                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 239                                     " VP[%d], mb = 0x%x, vha=%p\n",
 240                                     vha->host_no, __func__,i, *mb, vha));
 241                                 qla2x00_async_event(vha, mb);
 242                                 break;
 243                         }
 244                 }
 245         }
 246 }
 247
 248 void
 249 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 250 {
 251         /*
 252          * Physical port will do most of the abort and recovery work. We can
 253          * just treat it as a loop down
 254          */
 255         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 256                 atomic_set(&vha->loop_state, LOOP_DOWN);
 257                 qla2x00_mark_all_devices_lost(vha, 0);
 258         } else {
 259                 if (!atomic_read(&vha->loop_down_timer))
 260                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 261         }
 262
 263         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 264             vha->host_no, vha->vp_idx));
 265         qla24xx_enable_vp(vha);
 266 }
 267
 268 static int
 269 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 270 {
 271         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 272                 /* VP acquired. complete port configuration */
 273                 qla24xx_configure_vp(vha);
 274                 return 0;
 275         }
 276
 277         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
 278                 qla2x00_vp_abort_isp(vha);
 279
 280         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 281             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 282                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 283         }
 284
 285         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 286                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 287                         qla2x00_loop_resync(vha);
 288                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 289                 }
 290         }
 291
 292         return 0;
 293 }
 294
 295 void
 296 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 297 {
 298         int ret;
 299         int i, vp_idx_matched;
 300         scsi_qla_host_t *vha;
 301
 302         if (ha->parent)
 303                 return;
 304         if (list_empty(&ha->vp_list))
 305                 return;
 306
 307         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 308
 309         for_each_mapped_vp_idx(ha, i) {
 310                 vp_idx_matched = 0;
 311
 312                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 313                         if (i == vha->vp_idx) {
 314                                 vp_idx_matched = 1;
 315                                 break;
 316                         }
 317                 }
 318
 319                 if (vp_idx_matched)
 320                         ret = qla2x00_do_dpc_vp(vha);
 321         }
 322 }
 323
 324 int
 325 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 326 {
 327         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 328         scsi_qla_host_t *vha;
 329         uint8_t port_name[WWN_SIZE];
 330
 331         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 332                 return VPCERR_UNSUPPORTED;
 333
 334         /* Check up the F/W and H/W support NPIV */
 335         if (!ha->flags.npiv_supported)
 336                 return VPCERR_UNSUPPORTED;
 337
 338         /* Check up whether npiv supported switch presented */
 339         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 340                 return VPCERR_NO_FABRIC_SUPP;
 341
 342         /* Check up unique WWPN */
 343         u64_to_wwn(fc_vport->port_name, port_name);
 344         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
 345                 return VPCERR_BAD_WWN;
 346         vha = qla24xx_find_vhost_by_name(ha, port_name);
 347         if (vha)
 348                 return VPCERR_BAD_WWN;
 349
 350         /* Check up max-npiv-supports */
 351         if (ha->num_vhosts > ha->max_npiv_vports) {
 352                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 353                     "max_npv_vports %ud.\n", ha->host_no,
 354                     ha->num_vhosts, ha->max_npiv_vports));
 355                 return VPCERR_UNSUPPORTED;
 356         }
 357         return 0;
 358 }
 359
 360 scsi_qla_host_t *
 361 qla24xx_create_vhost(struct fc_vport *fc_vport)
 362 {
 363         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 364         scsi_qla_host_t *vha;
 365         struct Scsi_Host *host;
 366
 367         host = scsi_host_alloc(&qla24xx_driver_template,
 368             sizeof(scsi_qla_host_t));
 369         if (!host) {
 370                 printk(KERN_WARNING
 371                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 372                 return(NULL);
 373         }
 374
 375         vha = shost_priv(host);
 376
 377         /* clone the parent hba */
 378         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 379
 380         fc_vport->dd_data = vha;
 381
 382         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 383         if (!vha->node_name)
 384                 goto create_vhost_failed_1;
 385
 386         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 387         if (!vha->port_name)
 388                 goto create_vhost_failed_2;
 389
 390         /* New host info */
 391         u64_to_wwn(fc_vport->node_name, vha->node_name);
 392         u64_to_wwn(fc_vport->port_name, vha->port_name);
 393
 394         vha->host = host;
 395         vha->host_no = host->host_no;
 396         vha->parent = ha;
 397         vha->fc_vport = fc_vport;
 398         vha->device_flags = 0;
 399         vha->instance = num_hosts;
 400         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 401         if (vha->vp_idx > ha->max_npiv_vports) {
 402                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 403                         vha->host_no));
 404                 goto create_vhost_failed_3;
 405         }
 406         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 407
 408         init_completion(&vha->mbx_cmd_comp);
 409         complete(&vha->mbx_cmd_comp);
 410         init_completion(&vha->mbx_intr_comp);
 411
 412         INIT_LIST_HEAD(&vha->list);
 413         INIT_LIST_HEAD(&vha->fcports);
 414         INIT_LIST_HEAD(&vha->vp_fcports);
 415
 416         vha->dpc_flags = 0L;
 417         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 418         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 419
 420         /*
 421          * To fix the issue of processing a parent's RSCN for the vport before
 422          * its SCR is complete.
 423          */
 424         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 425         atomic_set(&vha->loop_state, LOOP_DOWN);
 426         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 427
 428         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 429
 430         host->can_queue = vha->request_q_length + 128;
 431         host->this_id = 255;
 432         host->cmd_per_lun = 3;
 433         host->max_cmd_len = MAX_CMDSZ;
 434         host->max_channel = MAX_BUSES - 1;
 435         host->max_lun = MAX_LUNS;
 436         host->unique_id = vha->instance;
 437         host->max_id = MAX_TARGETS_2200;
 438         host->transportt = qla2xxx_transport_vport_template;
 439
 440         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 441             vha->host_no, vha));
 442
 443         vha->flags.init_done = 1;
 444         num_hosts++;
 445
 446         down(&ha->vport_sem);
 447         set_bit(vha->vp_idx, ha->vp_idx_map);
 448         ha->cur_vport_count++;
 449         up(&ha->vport_sem);
 450
 451         return vha;
 452
 453 create_vhost_failed_3:
 454         kfree(vha->port_name);
 455
 456 create_vhost_failed_2:
 457         kfree(vha->node_name);
 458
 459 create_vhost_failed_1:
 460         return NULL;
 461 }