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   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 qla2x00_vp_stop_timer(scsi_qla_host_t *);
  20
  21 void
  22 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
  23 {
  24         if (vha->parent && vha->timer_active) {
  25                 del_timer_sync(&vha->timer);
  26                 vha->timer_active = 0;
  27         }
  28 }
  29
  30 static uint32_t
  31 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
  32 {
  33         uint32_t vp_id;
  34         scsi_qla_host_t *ha = vha->parent;
  35
  36         /* Find an empty slot and assign an vp_id */
  37         down(&ha->vport_sem);
  38         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
  39         if (vp_id > ha->max_npiv_vports) {
  40                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
  41                     vp_id, ha->max_npiv_vports));
  42                 up(&ha->vport_sem);
  43                 return vp_id;
  44         }
  45
  46         set_bit(vp_id, ha->vp_idx_map);
  47         ha->num_vhosts++;
  48         vha->vp_idx = vp_id;
  49         list_add_tail(&vha->vp_list, &ha->vp_list);
  50         up(&ha->vport_sem);
  51         return vp_id;
  52 }
  53
  54 void
  55 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  56 {
  57         uint16_t vp_id;
  58         scsi_qla_host_t *ha = vha->parent;
  59
  60         down(&ha->vport_sem);
  61         vp_id = vha->vp_idx;
  62         ha->num_vhosts--;
  63         clear_bit(vp_id, ha->vp_idx_map);
  64         list_del(&vha->vp_list);
  65         up(&ha->vport_sem);
  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         down(&ha->vport_sem);
 151         ret = qla24xx_modify_vp_config(vha);
 152         up(&ha->vport_sem);
 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         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 260                 /* VP acquired. complete port configuration */
 261                 qla24xx_configure_vp(vha);
 262                 return 0;
 263         }
 264
 265         if (test_and_clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
 266                 qla2x00_vp_abort_isp(vha);
 267
 268         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 269             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 270                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 271         }
 272
 273         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 274                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 275                         qla2x00_loop_resync(vha);
 276                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 277                 }
 278         }
 279
 280         return 0;
 281 }
 282
 283 void
 284 qla2x00_do_dpc_all_vps(scsi_qla_host_t *ha)
 285 {
 286         int ret;
 287         int i, vp_idx_matched;
 288         scsi_qla_host_t *vha;
 289
 290         if (ha->parent)
 291                 return;
 292         if (list_empty(&ha->vp_list))
 293                 return;
 294
 295         clear_bit(VP_DPC_NEEDED, &ha->dpc_flags);
 296
 297         for_each_mapped_vp_idx(ha, i) {
 298                 vp_idx_matched = 0;
 299
 300                 list_for_each_entry(vha, &ha->vp_list, vp_list) {
 301                         if (i == vha->vp_idx) {
 302                                 vp_idx_matched = 1;
 303                                 break;
 304                         }
 305                 }
 306
 307                 if (vp_idx_matched)
 308                         ret = qla2x00_do_dpc_vp(vha);
 309         }
 310 }
 311
 312 int
 313 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 314 {
 315         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 316         scsi_qla_host_t *vha;
 317         uint8_t port_name[WWN_SIZE];
 318
 319         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 320                 return VPCERR_UNSUPPORTED;
 321
 322         /* Check up the F/W and H/W support NPIV */
 323         if (!ha->flags.npiv_supported)
 324                 return VPCERR_UNSUPPORTED;
 325
 326         /* Check up whether npiv supported switch presented */
 327         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 328                 return VPCERR_NO_FABRIC_SUPP;
 329
 330         /* Check up unique WWPN */
 331         u64_to_wwn(fc_vport->port_name, port_name);
 332         if (!memcmp(port_name, ha->port_name, WWN_SIZE))
 333                 return VPCERR_BAD_WWN;
 334         vha = qla24xx_find_vhost_by_name(ha, port_name);
 335         if (vha)
 336                 return VPCERR_BAD_WWN;
 337
 338         /* Check up max-npiv-supports */
 339         if (ha->num_vhosts > ha->max_npiv_vports) {
 340                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 341                     "max_npv_vports %ud.\n", ha->host_no,
 342                     ha->num_vhosts, ha->max_npiv_vports));
 343                 return VPCERR_UNSUPPORTED;
 344         }
 345         return 0;
 346 }
 347
 348 scsi_qla_host_t *
 349 qla24xx_create_vhost(struct fc_vport *fc_vport)
 350 {
 351         scsi_qla_host_t *ha = shost_priv(fc_vport->shost);
 352         scsi_qla_host_t *vha;
 353         struct Scsi_Host *host;
 354
 355         host = scsi_host_alloc(&qla24xx_driver_template,
 356             sizeof(scsi_qla_host_t));
 357         if (!host) {
 358                 printk(KERN_WARNING
 359                     "qla2xxx: scsi_host_alloc() failed for vport\n");
 360                 return(NULL);
 361         }
 362
 363         vha = shost_priv(host);
 364
 365         /* clone the parent hba */
 366         memcpy(vha, ha, sizeof (scsi_qla_host_t));
 367
 368         fc_vport->dd_data = vha;
 369
 370         vha->node_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 371         if (!vha->node_name)
 372                 goto create_vhost_failed_1;
 373
 374         vha->port_name = kmalloc(WWN_SIZE * sizeof(char), GFP_KERNEL);
 375         if (!vha->port_name)
 376                 goto create_vhost_failed_2;
 377
 378         /* New host info */
 379         u64_to_wwn(fc_vport->node_name, vha->node_name);
 380         u64_to_wwn(fc_vport->port_name, vha->port_name);
 381
 382         vha->host = host;
 383         vha->host_no = host->host_no;
 384         vha->parent = ha;
 385         vha->fc_vport = fc_vport;
 386         vha->device_flags = 0;
 387         vha->instance = num_hosts;
 388         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 389         if (vha->vp_idx > ha->max_npiv_vports) {
 390                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 391                         vha->host_no));
 392                 goto create_vhost_failed_3;
 393         }
 394         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 395
 396         init_completion(&vha->mbx_cmd_comp);
 397         complete(&vha->mbx_cmd_comp);
 398         init_completion(&vha->mbx_intr_comp);
 399
 400         INIT_LIST_HEAD(&vha->list);
 401         INIT_LIST_HEAD(&vha->fcports);
 402         INIT_LIST_HEAD(&vha->vp_fcports);
 403
 404         vha->dpc_flags = 0L;
 405         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 406         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 407
 408         /*
 409          * To fix the issue of processing a parent's RSCN for the vport before
 410          * its SCR is complete.
 411          */
 412         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 413         atomic_set(&vha->loop_state, LOOP_DOWN);
 414         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 415
 416         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 417
 418         host->can_queue = vha->request_q_length + 128;
 419         host->this_id = 255;
 420         host->cmd_per_lun = 3;
 421         host->max_cmd_len = MAX_CMDSZ;
 422         host->max_channel = MAX_BUSES - 1;
 423         host->max_lun = MAX_LUNS;
 424         host->unique_id = vha->instance;
 425         host->max_id = MAX_TARGETS_2200;
 426         host->transportt = qla2xxx_transport_vport_template;
 427
 428         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 429             vha->host_no, vha));
 430
 431         vha->flags.init_done = 1;
 432         num_hosts++;
 433
 434         down(&ha->vport_sem);
 435         set_bit(vha->vp_idx, ha->vp_idx_map);
 436         ha->cur_vport_count++;
 437         up(&ha->vport_sem);
 438
 439         return vha;
 440
 441 create_vhost_failed_3:
 442         kfree(vha->port_name);
 443
 444 create_vhost_failed_2:
 445         kfree(vha->node_name);
 446
 447 create_vhost_failed_1:
 448         return NULL;
 449 }