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 #include "qla_gbl.h"
   9
  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->vp_idx && 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         struct qla_hw_data *ha = vha->hw;
  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->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         struct qla_hw_data *ha = vha->hw;
  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->list);
  65         mutex_unlock(&ha->vport_lock);
  66 }
  67
  68 static scsi_qla_host_t *
  69 qla24xx_find_vhost_by_name(struct qla_hw_data *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, 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
  99         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 100                 DEBUG15(printk("scsi(%ld): Marking port dead, "
 101                     "loop_id=0x%04x :%x\n",
 102                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 103
 104                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 105                 atomic_set(&fcport->state, FCS_UNCONFIGURED);
 106         }
 107 }
 108
 109 int
 110 qla24xx_disable_vp(scsi_qla_host_t *vha)
 111 {
 112         int ret;
 113
 114         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 115         atomic_set(&vha->loop_state, LOOP_DOWN);
 116         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 117
 118         qla2x00_mark_vp_devices_dead(vha);
 119         atomic_set(&vha->vp_state, VP_FAILED);
 120         vha->flags.management_server_logged_in = 0;
 121         if (ret == QLA_SUCCESS) {
 122                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 123         } else {
 124                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 125                 return -1;
 126         }
 127         return 0;
 128 }
 129
 130 int
 131 qla24xx_enable_vp(scsi_qla_host_t *vha)
 132 {
 133         int ret;
 134         struct qla_hw_data *ha = vha->hw;
 135         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 136
 137         /* Check if physical ha port is Up */
 138         if (atomic_read(&base_vha->loop_state) == LOOP_DOWN  ||
 139                 atomic_read(&base_vha->loop_state) == LOOP_DEAD) {
 140                 vha->vp_err_state =  VP_ERR_PORTDWN;
 141                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 142                 goto enable_failed;
 143         }
 144
 145         /* Initialize the new vport unless it is a persistent port */
 146         mutex_lock(&ha->vport_lock);
 147         ret = qla24xx_modify_vp_config(vha);
 148         mutex_unlock(&ha->vport_lock);
 149
 150         if (ret != QLA_SUCCESS) {
 151                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 152                 goto enable_failed;
 153         }
 154
 155         DEBUG15(qla_printk(KERN_INFO, ha,
 156             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 157         return 0;
 158
 159 enable_failed:
 160         DEBUG15(qla_printk(KERN_INFO, ha,
 161             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 162         return 1;
 163 }
 164
 165 static void
 166 qla24xx_configure_vp(scsi_qla_host_t *vha)
 167 {
 168         struct fc_vport *fc_vport;
 169         int ret;
 170
 171         fc_vport = vha->fc_vport;
 172
 173         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 174             vha->host_no, __func__));
 175         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 176         if (ret != QLA_SUCCESS) {
 177                 DEBUG15(qla_printk(KERN_ERR, vha->hw, "Failed to enable "
 178                     "receiving of RSCN requests: 0x%x\n", ret));
 179                 return;
 180         } else {
 181                 /* Corresponds to SCR enabled */
 182                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 183         }
 184
 185         vha->flags.online = 1;
 186         if (qla24xx_configure_vhba(vha))
 187                 return;
 188
 189         atomic_set(&vha->vp_state, VP_ACTIVE);
 190         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 191 }
 192
 193 void
 194 qla2x00_alert_all_vps(struct qla_hw_data *ha, uint16_t *mb)
 195 {
 196         scsi_qla_host_t *vha;
 197         int i = 0;
 198
 199         list_for_each_entry(vha, &ha->vp_list, list) {
 200                 if (vha->vp_idx) {
 201                         switch (mb[0]) {
 202                         case MBA_LIP_OCCURRED:
 203                         case MBA_LOOP_UP:
 204                         case MBA_LOOP_DOWN:
 205                         case MBA_LIP_RESET:
 206                         case MBA_POINT_TO_POINT:
 207                         case MBA_CHG_IN_CONNECTION:
 208                         case MBA_PORT_UPDATE:
 209                         case MBA_RSCN_UPDATE:
 210                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 211                                 " VP[%d], mb = 0x%x, vha=%p\n",
 212                                 vha->host_no, __func__, i, *mb, vha));
 213                                 qla2x00_async_event(vha, mb);
 214                                 break;
 215                         }
 216                 }
 217                 i++;
 218         }
 219 }
 220
 221 int
 222 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 223 {
 224         /*
 225          * Physical port will do most of the abort and recovery work. We can
 226          * just treat it as a loop down
 227          */
 228         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 229                 atomic_set(&vha->loop_state, LOOP_DOWN);
 230                 qla2x00_mark_all_devices_lost(vha, 0);
 231         } else {
 232                 if (!atomic_read(&vha->loop_down_timer))
 233                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 234         }
 235
 236         /* To exclusively reset vport, we need to log it out first.*/
 237         if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
 238                 qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 239
 240         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 241             vha->host_no, vha->vp_idx));
 242         return qla24xx_enable_vp(vha);
 243 }
 244
 245 static int
 246 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 247 {
 248         struct qla_hw_data *ha = vha->hw;
 249         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 250
 251         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 252                 /* VP acquired. complete port configuration */
 253                 if (atomic_read(&base_vha->loop_state) == LOOP_READY) {
 254                         qla24xx_configure_vp(vha);
 255                 } else {
 256                         set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
 257                         set_bit(VP_DPC_NEEDED, &base_vha->dpc_flags);
 258                 }
 259
 260                 return 0;
 261         }
 262
 263         if (test_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags)) {
 264                 qla2x00_update_fcports(vha);
 265                 clear_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags);
 266         }
 267
 268         if ((test_and_clear_bit(RELOGIN_NEEDED, &vha->dpc_flags)) &&
 269                 !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) &&
 270                 atomic_read(&vha->loop_state) != LOOP_DOWN) {
 271
 272                 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
 273                                                 vha->host_no));
 274                 qla2x00_relogin(vha);
 275
 276                 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
 277                                                         vha->host_no));
 278         }
 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 (atomic_read(&vha->vp_state) == VP_ACTIVE &&
 286             test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 287                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 288                         qla2x00_loop_resync(vha);
 289                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 290                 }
 291         }
 292
 293         return 0;
 294 }
 295
 296 void
 297 qla2x00_do_dpc_all_vps(scsi_qla_host_t *vha)
 298 {
 299         int ret;
 300         struct qla_hw_data *ha = vha->hw;
 301         scsi_qla_host_t *vp;
 302
 303         if (vha->vp_idx)
 304                 return;
 305         if (list_empty(&ha->vp_list))
 306                 return;
 307
 308         clear_bit(VP_DPC_NEEDED, &vha->dpc_flags);
 309
 310         list_for_each_entry(vp, &ha->vp_list, list) {
 311                 if (vp->vp_idx)
 312                         ret = qla2x00_do_dpc_vp(vp);
 313         }
 314 }
 315
 316 int
 317 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 318 {
 319         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 320         struct qla_hw_data *ha = base_vha->hw;
 321         scsi_qla_host_t *vha;
 322         uint8_t port_name[WWN_SIZE];
 323
 324         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 325                 return VPCERR_UNSUPPORTED;
 326
 327         /* Check up the F/W and H/W support NPIV */
 328         if (!ha->flags.npiv_supported)
 329                 return VPCERR_UNSUPPORTED;
 330
 331         /* Check up whether npiv supported switch presented */
 332         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 333                 return VPCERR_NO_FABRIC_SUPP;
 334
 335         /* Check up unique WWPN */
 336         u64_to_wwn(fc_vport->port_name, port_name);
 337         if (!memcmp(port_name, base_vha->port_name, WWN_SIZE))
 338                 return VPCERR_BAD_WWN;
 339         vha = qla24xx_find_vhost_by_name(ha, port_name);
 340         if (vha)
 341                 return VPCERR_BAD_WWN;
 342
 343         /* Check up max-npiv-supports */
 344         if (ha->num_vhosts > ha->max_npiv_vports) {
 345                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 346                     "max_npv_vports %ud.\n", base_vha->host_no,
 347                     ha->num_vhosts, ha->max_npiv_vports));
 348                 return VPCERR_UNSUPPORTED;
 349         }
 350         return 0;
 351 }
 352
 353 scsi_qla_host_t *
 354 qla24xx_create_vhost(struct fc_vport *fc_vport)
 355 {
 356         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 357         struct qla_hw_data *ha = base_vha->hw;
 358         scsi_qla_host_t *vha;
 359         struct scsi_host_template *sht = &qla24xx_driver_template;
 360         struct Scsi_Host *host;
 361
 362         vha = qla2x00_create_host(sht, ha);
 363         if (!vha) {
 364                 DEBUG(printk("qla2xxx: scsi_host_alloc() failed for vport\n"));
 365                 return(NULL);
 366         }
 367
 368         host = vha->host;
 369         fc_vport->dd_data = vha;
 370
 371         /* New host info */
 372         u64_to_wwn(fc_vport->node_name, vha->node_name);
 373         u64_to_wwn(fc_vport->port_name, vha->port_name);
 374
 375         vha->fc_vport = fc_vport;
 376         vha->device_flags = 0;
 377         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 378         if (vha->vp_idx > ha->max_npiv_vports) {
 379                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 380                         vha->host_no));
 381                 goto create_vhost_failed;
 382         }
 383         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 384
 385         vha->dpc_flags = 0L;
 386         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 387         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 388
 389         /*
 390          * To fix the issue of processing a parent's RSCN for the vport before
 391          * its SCR is complete.
 392          */
 393         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 394         atomic_set(&vha->loop_state, LOOP_DOWN);
 395         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 396
 397         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 398
 399         host->can_queue = ha->req->length + 128;
 400         host->this_id = 255;
 401         host->cmd_per_lun = 3;
 402         host->max_cmd_len = MAX_CMDSZ;
 403         host->max_channel = MAX_BUSES - 1;
 404         host->max_lun = MAX_LUNS;
 405         host->unique_id = host->host_no;
 406         host->max_id = MAX_TARGETS_2200;
 407         host->transportt = qla2xxx_transport_vport_template;
 408
 409         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 410             vha->host_no, vha));
 411
 412         vha->flags.init_done = 1;
 413
 414         return vha;
 415
 416 create_vhost_failed:
 417         return NULL;
 418 }