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                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
 109                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 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 (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 282                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 283                         qla2x00_loop_resync(vha);
 284                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 285                 }
 286         }
 287
 288         return 0;
 289 }
 290
 291 void
 292 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 293 {
 294         int ret;
 295         int i, vp_idx_matched;
 296         scsi_qla_host_t *vha;
 297
 298         if (ha->parent)
 299                 return;
 300         if (list_empty(&ha->vp_list))
 301                 return;
 302
 303         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 304
 305         for_each_mapped_vp_idx(ha, i) {
 306                 vp_idx_matched = 0;
 307
 308                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 309                         if (i == vha->vp_idx) {
 310                                 vp_idx_matched = 1;
 311                                 break;
 312                         }
 313                 }
 314
 315                 if (vp_idx_matched)
 316                         ret = qla2x00_do_dpc_vp(vha);
 317         }
 318 }
 319
 320 int
 321 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 322 {
 323         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 324         scsi_qla_host_t *vha;
 325         uint8_t port_name[WWN_SIZE];
 326
 327         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 328                 return VPCERR_UNSUPPORTED;
 329
 330         /* Check up the F/W and H/W support NPIV */
 331         if (!ha->flags.npiv_supported)
 332                 return VPCERR_UNSUPPORTED;
 333
 334         /* Check up whether npiv supported switch presented */
 335         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 336                 return VPCERR_NO_FABRIC_SUPP;
 337
 338         /* Check up unique WWPN */
 339         u64_to_wwn(fc_vport->port_name, port_name);
 340         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
 341                 return VPCERR_BAD_WWN;
 342         vha = qla24xx_find_vhost_by_name(ha, port_name);
 343         if (vha)
 344                 return VPCERR_BAD_WWN;
 345
 346         /* Check up max-npiv-supports */
 347         if (ha->num_vhosts > ha->max_npiv_vports) {
 348                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 349                     "max_npv_vports %ud.\n", ha->host_no,
 350                     ha->num_vhosts, ha->max_npiv_vports));
 351                 return VPCERR_UNSUPPORTED;
 352         }
 353         return 0;
 354 }
 355
 356 scsi_qla_host_t *
 357 qla24xx_create_vhost(struct fc_vport *fc_vport)
 358 {
 359         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 360         scsi_qla_host_t *vha;
 361         struct Scsi_Host *host;
 362
 363         host = scsi_host_alloc(&qla24xx_driver_template,
 364             sizeof(scsi_qla_host_t));
 365         if (!host) {
 366                 printk(KERN_WARNING
 367                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 368                 return(NULL);
 369         }
 370
 371         vha = shost_priv(host);
 372
 373         /* clone the parent hba */
 374         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 375
 376         fc_vport->dd_data = vha;
 377
 378         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 379         if (!vha->node_name)
 380                 goto create_vhost_failed_1;
 381
 382         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 383         if (!vha->port_name)
 384                 goto create_vhost_failed_2;
 385
 386         /* New host info */
 387         u64_to_wwn(fc_vport->node_name, vha->node_name);
 388         u64_to_wwn(fc_vport->port_name, vha->port_name);
 389
 390         vha->host = host;
 391         vha->host_no = host->host_no;
 392         vha->parent = ha;
 393         vha->fc_vport = fc_vport;
 394         vha->device_flags = 0;
 395         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 396         if (vha->vp_idx > ha->max_npiv_vports) {
 397                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 398                         vha->host_no));
 399                 goto create_vhost_failed_3;
 400         }
 401         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 402
 403         init_completion(&vha->mbx_cmd_comp);
 404         complete(&vha->mbx_cmd_comp);
 405         init_completion(&vha->mbx_intr_comp);
 406
 407         INIT_LIST_HEAD(&vha->list);
 408         INIT_LIST_HEAD(&vha->fcports);
 409         INIT_LIST_HEAD(&vha->vp_fcports);
 410         INIT_LIST_HEAD(&vha->work_list);
 411
 412         vha->dpc_flags = 0L;
 413         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 414         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 415
 416         /*
 417          * To fix the issue of processing a parent's RSCN for the vport before
 418          * its SCR is complete.
 419          */
 420         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 421         atomic_set(&vha->loop_state, LOOP_DOWN);
 422         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 423
 424         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 425
 426         host->can_queue = vha->request_q_length + 128;
 427         host->this_id = 255;
 428         host->cmd_per_lun = 3;
 429         host->max_cmd_len = MAX_CMDSZ;
 430         host->max_channel = MAX_BUSES - 1;
 431         host->max_lun = MAX_LUNS;
 432         host->unique_id = host->host_no;
 433         host->max_id = MAX_TARGETS_2200;
 434         host->transportt = qla2xxx_transport_vport_template;
 435
 436         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 437             vha->host_no, vha));
 438
 439         vha->flags.init_done = 1;
 440
 441         return vha;
 442
 443 create_vhost_failed_3:
 444         kfree(vha->port_name);
 445
 446 create_vhost_failed_2:
 447         kfree(vha->node_name);
 448
 449 create_vhost_failed_1:
 450         return NULL;
 451 }