git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_rscn.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 /**
  10  * IO descriptor handle definitions.
  11  *
  12  * Signature form:
  13  *
  14  *      |31------28|27-------------------12|11-------0|
  15  *      |   Type   |   Rolling Signature   |   Index  |
  16  *      |----------|-----------------------|----------|
  17  *
  18  **/
  19
  20 #define HDL_TYPE_SCSI           0
  21 #define HDL_TYPE_ASYNC_IOCB     0x0A
  22
  23 #define HDL_INDEX_BITS  12
  24 #define HDL_ITER_BITS   16
  25 #define HDL_TYPE_BITS   4
  26
  27 #define HDL_INDEX_MASK  ((1UL << HDL_INDEX_BITS) - 1)
  28 #define HDL_ITER_MASK   ((1UL << HDL_ITER_BITS) - 1)
  29 #define HDL_TYPE_MASK   ((1UL << HDL_TYPE_BITS) - 1)
  30
  31 #define HDL_INDEX_SHIFT 0
  32 #define HDL_ITER_SHIFT  (HDL_INDEX_SHIFT + HDL_INDEX_BITS)
  33 #define HDL_TYPE_SHIFT  (HDL_ITER_SHIFT + HDL_ITER_BITS)
  34
  35 /* Local Prototypes. */
  36 static inline uint32_t qla2x00_to_handle(uint16_t, uint16_t, uint16_t);
  37 static inline uint16_t qla2x00_handle_to_idx(uint32_t);
  38 static inline uint32_t qla2x00_iodesc_to_handle(struct io_descriptor *);
  39 static inline struct io_descriptor *qla2x00_handle_to_iodesc(scsi_qla_host_t *,
  40     uint32_t);
  41
  42 static inline struct io_descriptor *qla2x00_alloc_iodesc(scsi_qla_host_t *);
  43 static inline void qla2x00_free_iodesc(struct io_descriptor *);
  44 static inline void qla2x00_init_io_descriptors(scsi_qla_host_t *);
  45
  46 static void qla2x00_iodesc_timeout(unsigned long);
  47 static inline void qla2x00_add_iodesc_timer(struct io_descriptor *);
  48 static inline void qla2x00_remove_iodesc_timer(struct io_descriptor *);
  49
  50 static inline void qla2x00_update_login_fcport(scsi_qla_host_t *,
  51     struct mbx_entry *, fc_port_t *);
  52
  53 static int qla2x00_send_abort_iocb(scsi_qla_host_t *, struct io_descriptor *,
  54     uint32_t, int);
  55 static int qla2x00_send_abort_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  56     struct mbx_entry *);
  57
  58 static int qla2x00_send_adisc_iocb(scsi_qla_host_t *, struct io_descriptor *,
  59     int);
  60 static int qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  61     struct mbx_entry *);
  62
  63 static int qla2x00_send_logout_iocb(scsi_qla_host_t *, struct io_descriptor *,
  64     int);
  65 static int qla2x00_send_logout_iocb_cb(scsi_qla_host_t *,
  66     struct io_descriptor *, struct mbx_entry *);
  67
  68 static int qla2x00_send_login_iocb(scsi_qla_host_t *, struct io_descriptor *,
  69     port_id_t *, int);
  70 static int qla2x00_send_login_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  71     struct mbx_entry *);
  72
  73 /**
  74  * Mailbox IOCB callback array.
  75  **/
  76 static int (*iocb_function_cb_list[LAST_IOCB_CB])
  77         (scsi_qla_host_t *, struct io_descriptor *, struct mbx_entry *) = {
  78
  79         qla2x00_send_abort_iocb_cb,
  80         qla2x00_send_adisc_iocb_cb,
  81         qla2x00_send_logout_iocb_cb,
  82         qla2x00_send_login_iocb_cb,
  83 };
  84
  85
  86 /**
  87  * Generic IO descriptor handle routines.
  88  **/
  89
  90 /**
  91  * qla2x00_to_handle() - Create a descriptor handle.
  92  * @type: descriptor type
  93  * @iter: descriptor rolling signature
  94  * @idx: index to the descriptor array
  95  *
  96  * Returns a composite handle based in the @type, @iter, and @idx.
  97  */
  98 static inline uint32_t
  99 qla2x00_to_handle(uint16_t type, uint16_t iter, uint16_t idx)
 100 {
 101         return ((uint32_t)(((uint32_t)type << HDL_TYPE_SHIFT) |
 102             ((uint32_t)iter << HDL_ITER_SHIFT) |
 103             ((uint32_t)idx << HDL_INDEX_SHIFT)));
 104 }
 105
 106 /**
 107  * qla2x00_handle_to_idx() - Retrive the index for a given handle.
 108  * @handle: descriptor handle
 109  *
 110  * Returns the index specified by the @handle.
 111  */
 112 static inline uint16_t
 113 qla2x00_handle_to_idx(uint32_t handle)
 114 {
 115         return ((uint16_t)(((handle) >> HDL_INDEX_SHIFT) & HDL_INDEX_MASK));
 116 }
 117
 118 /**
 119  * qla2x00_iodesc_to_handle() - Convert an IO descriptor to a unique handle.
 120  * @iodesc: io descriptor
 121  *
 122  * Returns a unique handle for @iodesc.
 123  */
 124 static inline uint32_t
 125 qla2x00_iodesc_to_handle(struct io_descriptor *iodesc)
 126 {
 127         uint32_t handle;
 128
 129         handle = qla2x00_to_handle(HDL_TYPE_ASYNC_IOCB,
 130             ++iodesc->ha->iodesc_signature, iodesc->idx);
 131         iodesc->signature = handle;
 132
 133         return (handle);
 134 }
 135
 136 /**
 137  * qla2x00_handle_to_iodesc() - Retrieve an IO descriptor given a unique handle.
 138  * @ha: HA context
 139  * @handle: handle to io descriptor
 140  *
 141  * Returns a pointer to the io descriptor, or NULL, if the io descriptor does
 142  * not exist or the io descriptors signature does not @handle.
 143  */
 144 static inline struct io_descriptor *
 145 qla2x00_handle_to_iodesc(scsi_qla_host_t *ha, uint32_t handle)
 146 {
 147         uint16_t idx;
 148         struct io_descriptor *iodesc;
 149
 150         idx = qla2x00_handle_to_idx(handle);
 151         iodesc = &ha->io_descriptors[idx];
 152         if (iodesc)
 153                 if (iodesc->signature != handle)
 154                         iodesc = NULL;
 155
 156         return (iodesc);
 157 }
 158
 159
 160 /**
 161  * IO descriptor allocation routines.
 162  **/
 163
 164 /**
 165  * qla2x00_alloc_iodesc() - Allocate an IO descriptor from the pool.
 166  * @ha: HA context
 167  *
 168  * Returns a pointer to the allocated io descriptor, or NULL, if none available.
 169  */
 170 static inline struct io_descriptor *
 171 qla2x00_alloc_iodesc(scsi_qla_host_t *ha)
 172 {
 173         uint16_t iter;
 174         struct io_descriptor *iodesc;
 175
 176         iodesc = NULL;
 177         for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
 178                 if (ha->io_descriptors[iter].used)
 179                         continue;
 180
 181                 iodesc = &ha->io_descriptors[iter];
 182                 iodesc->used = 1;
 183                 iodesc->idx = iter;
 184                 init_timer(&iodesc->timer);
 185                 iodesc->ha = ha;
 186                 iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
 187                 break;
 188         }
 189
 190         return (iodesc);
 191 }
 192
 193 /**
 194  * qla2x00_free_iodesc() - Free an IO descriptor.
 195  * @iodesc: io descriptor
 196  *
 197  * NOTE: The io descriptors timer *must* be stopped before it can be free'd.
 198  */
 199 static inline void
 200 qla2x00_free_iodesc(struct io_descriptor *iodesc)
 201 {
 202         iodesc->used = 0;
 203         iodesc->signature = 0;
 204 }
 205
 206 /**
 207  * qla2x00_remove_iodesc_timer() - Remove an active timer from an IO descriptor.
 208  * @iodesc: io descriptor
 209  */
 210 static inline void
 211 qla2x00_remove_iodesc_timer(struct io_descriptor *iodesc)
 212 {
 213         if (iodesc->timer.function != NULL) {
 214                 del_timer_sync(&iodesc->timer);
 215                 iodesc->timer.data = (unsigned long) NULL;
 216                 iodesc->timer.function = NULL;
 217         }
 218 }
 219
 220 /**
 221  * qla2x00_init_io_descriptors() - Initialize the pool of IO descriptors.
 222  * @ha: HA context
 223  */
 224 static inline void
 225 qla2x00_init_io_descriptors(scsi_qla_host_t *ha)
 226 {
 227         uint16_t iter;
 228
 229         for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
 230                 if (!ha->io_descriptors[iter].used)
 231                         continue;
 232
 233                 qla2x00_remove_iodesc_timer(&ha->io_descriptors[iter]);
 234                 qla2x00_free_iodesc(&ha->io_descriptors[iter]);
 235         }
 236 }
 237
 238
 239 /**
 240  * IO descriptor timer routines.
 241  **/
 242
 243 /**
 244  * qla2x00_iodesc_timeout() - Timeout IO descriptor handler.
 245  * @data: io descriptor
 246  */
 247 static void
 248 qla2x00_iodesc_timeout(unsigned long data)
 249 {
 250         struct io_descriptor *iodesc;
 251
 252         iodesc = (struct io_descriptor *) data;
 253
 254         DEBUG14(printk("scsi(%ld): IO descriptor timeout, index=%x "
 255             "signature=%08x, scheduling ISP abort.\n", iodesc->ha->host_no,
 256             iodesc->idx, iodesc->signature));
 257
 258         qla2x00_free_iodesc(iodesc);
 259
 260         qla_printk(KERN_WARNING, iodesc->ha,
 261             "IO descriptor timeout. Scheduling ISP abort.\n");
 262         set_bit(ISP_ABORT_NEEDED, &iodesc->ha->dpc_flags);
 263 }
 264
 265 /**
 266  * qla2x00_add_iodesc_timer() - Add and start a timer for an IO descriptor.
 267  * @iodesc: io descriptor
 268  *
 269  * NOTE:
 270  * The firmware shall timeout an outstanding mailbox IOCB in 2 * R_A_TOV (in
 271  * tenths of a second) after it hits the wire.  But, if there are any request
 272  * resource contraints (i.e. during heavy I/O), exchanges can be held off for
 273  * at most R_A_TOV.  Therefore, the driver will wait 4 * R_A_TOV before
 274  * scheduling a recovery (big hammer).
 275  */
 276 static inline void
 277 qla2x00_add_iodesc_timer(struct io_descriptor *iodesc)
 278 {
 279         unsigned long timeout;
 280
 281         timeout = (iodesc->ha->r_a_tov * 4) / 10;
 282         init_timer(&iodesc->timer);
 283         iodesc->timer.data = (unsigned long) iodesc;
 284         iodesc->timer.expires = jiffies + (timeout * HZ);
 285         iodesc->timer.function =
 286             (void (*) (unsigned long)) qla2x00_iodesc_timeout;
 287         add_timer(&iodesc->timer);
 288 }
 289
 290 /**
 291  * IO descriptor support routines.
 292  **/
 293
 294 /**
 295  * qla2x00_update_login_fcport() - Update fcport data after login processing.
 296  * @ha: HA context
 297  * @mbxstat: Mailbox command status IOCB
 298  * @fcport: port to update
 299  */
 300 static inline void
 301 qla2x00_update_login_fcport(scsi_qla_host_t *ha, struct mbx_entry *mbxstat,
 302     fc_port_t *fcport)
 303 {
 304         if (le16_to_cpu(mbxstat->mb1) & BIT_0) {
 305                 fcport->port_type = FCT_INITIATOR;
 306         } else {
 307                 fcport->port_type = FCT_TARGET;
 308                 if (le16_to_cpu(mbxstat->mb1) & BIT_1) {
 309                         fcport->flags |= FCF_TAPE_PRESENT;
 310                 }
 311         }
 312         fcport->login_retry = 0;
 313         fcport->port_login_retry_count = ha->port_down_retry_count *
 314             PORT_RETRY_TIME;
 315         atomic_set(&fcport->port_down_timer, ha->port_down_retry_count *
 316             PORT_RETRY_TIME);
 317         fcport->flags |= FCF_FABRIC_DEVICE;
 318         fcport->flags &= ~FCF_FAILOVER_NEEDED;
 319         fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 320         atomic_set(&fcport->state, FCS_ONLINE);
 321         schedule_work(&fcport->rport_add_work);
 322 }
 323
 324
 325 /**
 326  * Mailbox IOCB commands.
 327  **/
 328
 329 /**
 330  * qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
 331  * @ha: HA context
 332  * @handle: handle to io descriptor
 333  *
 334  * Returns a pointer to the reqest entry, or NULL, if none were available.
 335  */
 336 static inline struct mbx_entry *
 337 qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
 338 {
 339         uint16_t cnt;
 340         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 341         struct mbx_entry *mbxentry;
 342
 343         mbxentry = NULL;
 344
 345         if (ha->req_q_cnt < 3) {
 346                 cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
 347                 if  (ha->req_ring_index < cnt)
 348                         ha->req_q_cnt = cnt - ha->req_ring_index;
 349                 else
 350                         ha->req_q_cnt = ha->request_q_length -
 351                             (ha->req_ring_index - cnt);
 352         }
 353         if (ha->req_q_cnt >= 3) {
 354                 mbxentry = (struct mbx_entry *)ha->request_ring_ptr;
 355
 356                 memset(mbxentry, 0, sizeof(struct mbx_entry));
 357                 mbxentry->entry_type = MBX_IOCB_TYPE;
 358                 mbxentry->entry_count = 1;
 359                 mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
 360                 mbxentry->handle = handle;
 361         }
 362         return (mbxentry);
 363 }
 364
 365 /**
 366  * qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
 367  * @ha: HA context
 368  * @iodesc: io descriptor
 369  * @handle_to_abort: firmware handle to abort
 370  * @ha_locked: is function called with the hardware lock
 371  *
 372  * Returns QLA_SUCCESS if the IOCB was issued.
 373  */
 374 static int
 375 qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 376     uint32_t handle_to_abort, int ha_locked)
 377 {
 378         unsigned long flags = 0;
 379         struct mbx_entry *mbxentry;
 380
 381         /* Send marker if required. */
 382         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 383                 return (QLA_FUNCTION_FAILED);
 384
 385         if (!ha_locked)
 386                 spin_lock_irqsave(&ha->hardware_lock, flags);
 387
 388         /* Build abort mailbox IOCB. */
 389         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 390         if (mbxentry == NULL) {
 391                 if (!ha_locked)
 392                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 393
 394                 return (QLA_FUNCTION_FAILED);
 395         }
 396         mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
 397         mbxentry->mb1 = mbxentry->loop_id.extended =
 398             cpu_to_le16(iodesc->remote_fcport->loop_id);
 399         mbxentry->mb2 = LSW(handle_to_abort);
 400         mbxentry->mb3 = MSW(handle_to_abort);
 401         wmb();
 402
 403         qla2x00_add_iodesc_timer(iodesc);
 404
 405         /* Issue command to ISP. */
 406         qla2x00_isp_cmd(ha);
 407
 408         if (!ha_locked)
 409                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 410
 411         DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
 412             "%08x.\n", ha->host_no, iodesc->signature,
 413             iodesc->remote_fcport->loop_id, handle_to_abort));
 414
 415         return (QLA_SUCCESS);
 416 }
 417
 418 /**
 419  * qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
 420  * @ha: HA context
 421  * @iodesc: io descriptor
 422  * @mbxstat: mailbox status IOCB
 423  *
 424  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 425  * will be used for a retry.
 426  */
 427 static int
 428 qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 429     struct mbx_entry *mbxstat)
 430 {
 431         DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
 432             "status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
 433             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
 434             le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 435
 436         return (QLA_SUCCESS);
 437 }
 438
 439
 440 /**
 441  * qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
 442  * @ha: HA context
 443  * @iodesc: io descriptor
 444  * @ha_locked: is function called with the hardware lock
 445  *
 446  * Returns QLA_SUCCESS if the IOCB was issued.
 447  */
 448 static int
 449 qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 450     int ha_locked)
 451 {
 452         unsigned long flags = 0;
 453         struct mbx_entry *mbxentry;
 454
 455         /* Send marker if required. */
 456         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 457                 return (QLA_FUNCTION_FAILED);
 458
 459         if (!ha_locked)
 460                 spin_lock_irqsave(&ha->hardware_lock, flags);
 461
 462         /* Build Get Port Database IOCB. */
 463         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 464         if (mbxentry == NULL) {
 465                 if (!ha_locked)
 466                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 467
 468                 return (QLA_FUNCTION_FAILED);
 469         }
 470         mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
 471         mbxentry->mb1 = mbxentry->loop_id.extended =
 472             cpu_to_le16(iodesc->remote_fcport->loop_id);
 473         mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
 474         mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
 475         mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
 476         mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
 477         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 478         wmb();
 479
 480         qla2x00_add_iodesc_timer(iodesc);
 481
 482         /* Issue command to ISP. */
 483         qla2x00_isp_cmd(ha);
 484
 485         if (!ha_locked)
 486                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 487
 488         DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
 489             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 490
 491         return (QLA_SUCCESS);
 492 }
 493
 494 /**
 495  * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
 496  * @ha: HA context
 497  * @iodesc: io descriptor
 498  * @mbxstat: mailbox status IOCB
 499  *
 500  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 501  * will be used for a retry.
 502  */
 503 static int
 504 qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 505     struct mbx_entry *mbxstat)
 506 {
 507         fc_port_t *remote_fcport;
 508
 509         remote_fcport = iodesc->remote_fcport;
 510
 511         /* Ensure the port IDs are consistent. */
 512         if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
 513                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
 514                     "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
 515                     ha->host_no, remote_fcport->d_id.b.domain,
 516                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 517                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 518                     iodesc->d_id.b.al_pa));
 519
 520                 return (QLA_SUCCESS);
 521         }
 522
 523         /* Only process the last command. */
 524         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 525                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
 526                     "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
 527                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 528                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 529                     iodesc->idx));
 530
 531                 return (QLA_SUCCESS);
 532         }
 533
 534         if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
 535                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 536                     "[%x/%02x%02x%02x] online.\n", ha->host_no,
 537                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 538                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 539
 540                 atomic_set(&remote_fcport->state, FCS_ONLINE);
 541         } else {
 542                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 543                     "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
 544                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 545                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 546                     le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 547
 548                 if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
 549                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
 550         }
 551         remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 552
 553         return (QLA_SUCCESS);
 554 }
 555
 556
 557 /**
 558  * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
 559  * @ha: HA context
 560  * @iodesc: io descriptor
 561  * @ha_locked: is function called with the hardware lock
 562  *
 563  * Returns QLA_SUCCESS if the IOCB was issued.
 564  */
 565 static int
 566 qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 567     int ha_locked)
 568 {
 569         unsigned long flags = 0;
 570         struct mbx_entry *mbxentry;
 571
 572         /* Send marker if required. */
 573         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 574                 return (QLA_FUNCTION_FAILED);
 575
 576         if (!ha_locked)
 577                 spin_lock_irqsave(&ha->hardware_lock, flags);
 578
 579         /* Build fabric port logout mailbox IOCB. */
 580         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 581         if (mbxentry == NULL) {
 582                 if (!ha_locked)
 583                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 584
 585                 return (QLA_FUNCTION_FAILED);
 586         }
 587         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
 588         mbxentry->mb1 = mbxentry->loop_id.extended =
 589             cpu_to_le16(iodesc->remote_fcport->loop_id);
 590         wmb();
 591
 592         qla2x00_add_iodesc_timer(iodesc);
 593
 594         /* Issue command to ISP. */
 595         qla2x00_isp_cmd(ha);
 596
 597         if (!ha_locked)
 598                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 599
 600         DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
 601             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 602
 603         return (QLA_SUCCESS);
 604 }
 605
 606 /**
 607  * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
 608  * @ha: HA context
 609  * @iodesc: io descriptor
 610  * @mbxstat: mailbox status IOCB
 611  *
 612  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 613  * will be used for a retry.
 614  */
 615 static int
 616 qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 617     struct mbx_entry *mbxstat)
 618 {
 619         DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
 620             "status=%x mb0=%x mb1=%x.\n", ha->host_no,
 621             iodesc->remote_fcport->loop_id,
 622             iodesc->remote_fcport->d_id.b.domain,
 623             iodesc->remote_fcport->d_id.b.area,
 624             iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
 625             le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));
 626
 627         return (QLA_SUCCESS);
 628 }
 629
 630
 631 /**
 632  * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
 633  * @ha: HA context
 634  * @iodesc: io descriptor
 635  * @d_id: port id for device
 636  * @ha_locked: is function called with the hardware lock
 637  *
 638  * Returns QLA_SUCCESS if the IOCB was issued.
 639  */
 640 static int
 641 qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 642     port_id_t *d_id, int ha_locked)
 643 {
 644         unsigned long flags = 0;
 645         struct mbx_entry *mbxentry;
 646
 647         /* Send marker if required. */
 648         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 649                 return (QLA_FUNCTION_FAILED);
 650
 651         if (!ha_locked)
 652                 spin_lock_irqsave(&ha->hardware_lock, flags);
 653
 654         /* Build fabric port login mailbox IOCB. */
 655         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 656         if (mbxentry == NULL) {
 657                 if (!ha_locked)
 658                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 659
 660                 return (QLA_FUNCTION_FAILED);
 661         }
 662         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
 663         mbxentry->mb1 = mbxentry->loop_id.extended =
 664             cpu_to_le16(iodesc->remote_fcport->loop_id);
 665         mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
 666         mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
 667         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 668         wmb();
 669
 670         qla2x00_add_iodesc_timer(iodesc);
 671
 672         /* Issue command to ISP. */
 673         qla2x00_isp_cmd(ha);
 674
 675         if (!ha_locked)
 676                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 677
 678         DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
 679             "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
 680             iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
 681             d_id->b.al_pa));
 682
 683         return (QLA_SUCCESS);
 684 }
 685
 686 /**
 687  * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
 688  * @ha: HA context
 689  * @iodesc: io descriptor
 690  * @mbxstat: mailbox status IOCB
 691  *
 692  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 693  * will be used for a retry.
 694  */
 695 static int
 696 qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 697     struct mbx_entry *mbxstat)
 698 {
 699         int rval;
 700         fc_port_t *fcport, *remote_fcport, *exist_fcport;
 701         struct io_descriptor *abort_iodesc, *login_iodesc;
 702         uint16_t status, mb[8];
 703         uint16_t reuse;
 704         uint16_t remote_loopid;
 705         port_id_t remote_did, inuse_did;
 706
 707         remote_fcport = iodesc->remote_fcport;
 708
 709         /* Only process the last command. */
 710         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 711                 DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
 712                     "[%02x%02x%02x], expected %x, received %x.\n",
 713                     ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
 714                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 715                     iodesc->idx));
 716
 717                 /* Free RSCN fcport resources. */
 718                 if (remote_fcport->port_type == FCT_RSCN) {
 719                         DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
 720                             "fcport %p [%x/%02x%02x%02x] given ignored Login "
 721                             "IOCB.\n", ha->host_no, remote_fcport,
 722                             remote_fcport->loop_id,
 723                             remote_fcport->d_id.b.domain,
 724                             remote_fcport->d_id.b.area,
 725                             remote_fcport->d_id.b.al_pa));
 726
 727                         list_del(&remote_fcport->list);
 728                         kfree(remote_fcport);
 729                 }
 730                 return (QLA_SUCCESS);
 731         }
 732
 733         status = le16_to_cpu(mbxstat->status);
 734         mb[0] = le16_to_cpu(mbxstat->mb0);
 735         mb[1] = le16_to_cpu(mbxstat->mb1);
 736         mb[2] = le16_to_cpu(mbxstat->mb2);
 737         mb[6] = le16_to_cpu(mbxstat->mb6);
 738         mb[7] = le16_to_cpu(mbxstat->mb7);
 739
 740         /* Good status? */
 741         if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
 742             mb[0] == MBS_COMMAND_COMPLETE) {
 743
 744                 DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
 745                     "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
 746                     mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
 747                     mbxstat->port_name[2], mbxstat->port_name[3],
 748                     mbxstat->port_name[4], mbxstat->port_name[5],
 749                     mbxstat->port_name[6], mbxstat->port_name[7]));
 750
 751                 memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
 752                 memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);
 753
 754                 /* Is the device already in our fcports list? */
 755                 if (remote_fcport->port_type != FCT_RSCN) {
 756                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 757                             "[%x/%02x%02x%02x] online.\n", ha->host_no,
 758                             remote_fcport->loop_id,
 759                             remote_fcport->d_id.b.domain,
 760                             remote_fcport->d_id.b.area,
 761                             remote_fcport->d_id.b.al_pa));
 762
 763                         qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 764
 765                         return (QLA_SUCCESS);
 766                 }
 767
 768                 /* Does the RSCN portname already exist in our fcports list? */
 769                 exist_fcport = NULL;
 770                 list_for_each_entry(fcport, &ha->fcports, list) {
 771                         if (memcmp(remote_fcport->port_name, fcport->port_name,
 772                             WWN_SIZE) == 0) {
 773                                 exist_fcport = fcport;
 774                                 break;
 775                         }
 776                 }
 777                 if (exist_fcport != NULL) {
 778                         DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
 779                             "fcport in fcports list [%p].\n", ha->host_no,
 780                             exist_fcport));
 781
 782                         /* Abort any ADISC that could have been sent. */
 783                         if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
 784                             exist_fcport->iodesc_idx_sent <
 785                             MAX_IO_DESCRIPTORS &&
 786                             ha->io_descriptors[exist_fcport->iodesc_idx_sent].
 787                             cb_idx == ADISC_PORT_IOCB_CB) {
 788
 789                                 abort_iodesc = qla2x00_alloc_iodesc(ha);
 790                                 if (abort_iodesc) {
 791                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 792                                             "-- issuing abort to outstanding "
 793                                             "Adisc [%x/%02x%02x%02x].\n",
 794                                             ha->host_no, remote_fcport->loop_id,
 795                                             exist_fcport->d_id.b.domain,
 796                                             exist_fcport->d_id.b.area,
 797                                             exist_fcport->d_id.b.al_pa));
 798
 799                                         abort_iodesc->cb_idx = ABORT_IOCB_CB;
 800                                         abort_iodesc->d_id.b24 =
 801                                             exist_fcport->d_id.b24;
 802                                         abort_iodesc->remote_fcport =
 803                                             exist_fcport;
 804                                         exist_fcport->iodesc_idx_sent =
 805                                             abort_iodesc->idx;
 806                                         qla2x00_send_abort_iocb(ha,
 807                                             abort_iodesc, ha->io_descriptors[
 808                                              exist_fcport->iodesc_idx_sent].
 809                                               signature, 1);
 810                                 } else {
 811                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 812                                             "-- unable to abort outstanding "
 813                                             "Adisc [%x/%02x%02x%02x].\n",
 814                                             ha->host_no, remote_fcport->loop_id,
 815                                             exist_fcport->d_id.b.domain,
 816                                             exist_fcport->d_id.b.area,
 817                                             exist_fcport->d_id.b.al_pa));
 818                                 }
 819                         }
 820
 821                         /*
 822                          * If the existing fcport is waiting to send an ADISC
 823                          * or LOGIN, then reuse remote fcport (RSCN) to
 824                          * continue waiting.
 825                          */
 826                         reuse = 0;
 827                         remote_loopid = remote_fcport->loop_id;
 828                         remote_did.b24 = remote_fcport->d_id.b24;
 829                         if (exist_fcport->iodesc_idx_sent ==
 830                             IODESC_ADISC_NEEDED ||
 831                             exist_fcport->iodesc_idx_sent ==
 832                             IODESC_LOGIN_NEEDED) {
 833                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 834                                     "existing fcport [%x/%02x%02x%02x] "
 835                                     "waiting for IO descriptor, reuse RSCN "
 836                                     "fcport.\n", ha->host_no,
 837                                     exist_fcport->loop_id,
 838                                     exist_fcport->d_id.b.domain,
 839                                     exist_fcport->d_id.b.area,
 840                                     exist_fcport->d_id.b.al_pa));
 841
 842                                 reuse++;
 843                                 remote_fcport->iodesc_idx_sent =
 844                                     exist_fcport->iodesc_idx_sent;
 845                                 exist_fcport->iodesc_idx_sent =
 846                                     IODESC_INVALID_INDEX;
 847                                 remote_fcport->loop_id = exist_fcport->loop_id;
 848                                 remote_fcport->d_id.b24 =
 849                                     exist_fcport->d_id.b24;
 850                         }
 851
 852                         /* Logout the old loopid. */
 853                         if (!reuse &&
 854                             exist_fcport->loop_id != remote_fcport->loop_id &&
 855                             exist_fcport->loop_id != FC_NO_LOOP_ID) {
 856                                 login_iodesc = qla2x00_alloc_iodesc(ha);
 857                                 if (login_iodesc) {
 858                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 859                                             "-- issuing logout to free old "
 860                                             "loop id [%x/%02x%02x%02x].\n",
 861                                             ha->host_no, exist_fcport->loop_id,
 862                                             exist_fcport->d_id.b.domain,
 863                                             exist_fcport->d_id.b.area,
 864                                             exist_fcport->d_id.b.al_pa));
 865
 866                                         login_iodesc->cb_idx =
 867                                             LOGOUT_PORT_IOCB_CB;
 868                                         login_iodesc->d_id.b24 =
 869                                             exist_fcport->d_id.b24;
 870                                         login_iodesc->remote_fcport =
 871                                             exist_fcport;
 872                                         exist_fcport->iodesc_idx_sent =
 873                                             login_iodesc->idx;
 874                                         qla2x00_send_logout_iocb(ha,
 875                                             login_iodesc, 1);
 876                                 } else {
 877                                         /* Ran out of IO descriptiors. */
 878                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 879                                             "-- unable to logout to free old "
 880                                             "loop id [%x/%02x%02x%02x].\n",
 881                                             ha->host_no, exist_fcport->loop_id,
 882                                             exist_fcport->d_id.b.domain,
 883                                             exist_fcport->d_id.b.area,
 884                                             exist_fcport->d_id.b.al_pa));
 885
 886                                         exist_fcport->iodesc_idx_sent =
 887                                             IODESC_INVALID_INDEX;
 888                                 }
 889
 890                         }
 891
 892                         /* Update existing fcport with remote fcport info. */
 893                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 894                             "existing fcport [%x/%02x%02x%02x] online.\n",
 895                             ha->host_no, remote_loopid, remote_did.b.domain,
 896                             remote_did.b.area, remote_did.b.al_pa));
 897
 898                         memcpy(exist_fcport->node_name,
 899                             remote_fcport->node_name, WWN_SIZE);
 900                         exist_fcport->loop_id = remote_loopid;
 901                         exist_fcport->d_id.b24 = remote_did.b24;
 902                         qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);
 903
 904                         /* Finally, free the remote (RSCN) fcport. */
 905                         if (!reuse) {
 906                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 907                                     "Freeing RSCN fcport %p "
 908                                     "[%x/%02x%02x%02x].\n", ha->host_no,
 909                                     remote_fcport, remote_fcport->loop_id,
 910                                     remote_fcport->d_id.b.domain,
 911                                     remote_fcport->d_id.b.area,
 912                                     remote_fcport->d_id.b.al_pa));
 913
 914                                 list_del(&remote_fcport->list);
 915                                 kfree(remote_fcport);
 916                         }
 917
 918                         return (QLA_SUCCESS);
 919                 }
 920
 921                 /*
 922                  * A new device has been added, move the RSCN fcport to our
 923                  * fcports list.
 924                  */
 925                 DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
 926                     "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
 927                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 928                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 929
 930                 list_del(&remote_fcport->list);
 931                 remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
 932                 qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 933                 list_add_tail(&remote_fcport->list, &ha->fcports);
 934                 set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
 935         } else {
 936                 /* Handle login failure. */
 937                 if (remote_fcport->login_retry != 0) {
 938                         if (mb[0] == MBS_LOOP_ID_USED) {
 939                                 inuse_did.b.domain = LSB(mb[1]);
 940                                 inuse_did.b.area = MSB(mb[2]);
 941                                 inuse_did.b.al_pa = LSB(mb[2]);
 942
 943                                 DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
 944                                     "id [%x] used by port id [%02x%02x%02x].\n",
 945                                     ha->host_no, remote_fcport->loop_id,
 946                                     inuse_did.b.domain, inuse_did.b.area,
 947                                     inuse_did.b.al_pa));
 948
 949                                 if (remote_fcport->d_id.b24 ==
 950                                     INVALID_PORT_ID) {
 951                                         /*
 952                                          * Invalid port id means we are trying
 953                                          * to login to a remote port with just
 954                                          * a loop id without knowing about the
 955                                          * port id.  Copy the port id and try
 956                                          * again.
 957                                          */
 958                                         remote_fcport->d_id.b24 = inuse_did.b24;
 959                                         iodesc->d_id.b24 = inuse_did.b24;
 960                                 } else {
 961                                         remote_fcport->loop_id++;
 962                                         rval = qla2x00_find_new_loop_id(ha,
 963                                             remote_fcport);
 964                                         if (rval == QLA_FUNCTION_FAILED) {
 965                                                 /* No more loop ids. */
 966                                                 return (QLA_SUCCESS);
 967                                         }
 968                                 }
 969                         } else if (mb[0] == MBS_PORT_ID_USED) {
 970                                 /*
 971                                  * Device has another loop ID.  The firmware
 972                                  * group recommends the driver perform an
 973                                  * implicit login with the specified ID.
 974                                  */
 975                                 DEBUG14(printk("scsi(%ld): Login IOCB -- port "
 976                                     "id [%02x%02x%02x] already assigned to "
 977                                     "loop id [%x].\n", ha->host_no,
 978                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 979                                     iodesc->d_id.b.al_pa, mb[1]));
 980
 981                                 remote_fcport->loop_id = mb[1];
 982
 983                         } else {
 984                                 /* Unable to perform login, try again. */
 985                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 986                                     "failed login [%x/%02x%02x%02x], status=%x "
 987                                     "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
 988                                     ha->host_no, remote_fcport->loop_id,
 989                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 990                                     iodesc->d_id.b.al_pa, status, mb[0], mb[1],
 991                                     mb[2], mb[6], mb[7]));
 992                         }
 993
 994                         /* Reissue Login with the same IO descriptor. */
 995                         iodesc->signature =
 996                             qla2x00_iodesc_to_handle(iodesc);
 997                         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
 998                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
 999                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1000                         remote_fcport->login_retry--;
1001
1002                         DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
1003                             "login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
1004                             remote_fcport->loop_id,
1005                             remote_fcport->d_id.b.domain,
1006                             remote_fcport->d_id.b.area,
1007                             remote_fcport->d_id.b.al_pa,
1008                             remote_fcport->login_retry));
1009
1010                         qla2x00_send_login_iocb(ha, iodesc,
1011                             &remote_fcport->d_id, 1);
1012
1013                         return (QLA_FUNCTION_FAILED);
1014                 } else {
1015                         /* No more logins, mark device dead. */
1016                         DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
1017                             "login [%x/%02x%02x%02x] after retries, status=%x "
1018                             "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
1019                             ha->host_no, remote_fcport->loop_id,
1020                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1021                             iodesc->d_id.b.al_pa, status, mb[0], mb[1],
1022                             mb[2], mb[6], mb[7]));
1023
1024                         atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
1025                         if (remote_fcport->port_type == FCT_RSCN) {
1026                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
1027                                     "Freeing dead RSCN fcport %p "
1028                                     "[%x/%02x%02x%02x].\n", ha->host_no,
1029                                     remote_fcport, remote_fcport->loop_id,
1030                                     remote_fcport->d_id.b.domain,
1031                                     remote_fcport->d_id.b.area,
1032                                     remote_fcport->d_id.b.al_pa));
1033
1034                                 list_del(&remote_fcport->list);
1035                                 kfree(remote_fcport);
1036                         }
1037                 }
1038         }
1039
1040         return (QLA_SUCCESS);
1041 }
1042
1043
1044 /**
1045  * IO descriptor processing routines.
1046  **/
1047
1048 /**
1049  * qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
1050  * @ha: HA context
1051  * @flags: allocation flags
1052  *
1053  * Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
1054  */
1055 fc_port_t *
1056 qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, gfp_t flags)
1057 {
1058         fc_port_t *fcport;
1059
1060         fcport = qla2x00_alloc_fcport(ha, flags);
1061         if (fcport == NULL)
1062                 return (fcport);
1063
1064         /* Setup RSCN fcport structure. */
1065         fcport->port_type = FCT_RSCN;
1066
1067         return (fcport);
1068 }
1069
1070 /**
1071  * qla2x00_handle_port_rscn() - Handle port RSCN.
1072  * @ha: HA context
1073  * @rscn_entry: RSCN entry
1074  * @fcport: fcport entry to updated
1075  *
1076  * Returns QLA_SUCCESS if the port RSCN was handled.
1077  */
1078 int
1079 qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
1080     fc_port_t *known_fcport, int ha_locked)
1081 {
1082         int     rval;
1083         port_id_t rscn_pid;
1084         fc_port_t *fcport, *remote_fcport, *rscn_fcport;
1085         struct io_descriptor *iodesc;
1086
1087         remote_fcport = NULL;
1088         rscn_fcport = NULL;
1089
1090         /* Prepare port id based on incoming entries. */
1091         if (known_fcport) {
1092                 rscn_pid.b24 = known_fcport->d_id.b24;
1093                 remote_fcport = known_fcport;
1094
1095                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1096                     "fcport [%02x%02x%02x].\n", ha->host_no,
1097                     remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
1098                     remote_fcport->d_id.b.al_pa));
1099         } else {
1100                 rscn_pid.b.domain = LSB(MSW(rscn_entry));
1101                 rscn_pid.b.area = MSB(LSW(rscn_entry));
1102                 rscn_pid.b.al_pa = LSB(LSW(rscn_entry));
1103
1104                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1105                     "port id [%02x%02x%02x].\n", ha->host_no,
1106                     rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));
1107
1108                 /*
1109                  * Search fcport lists for a known entry at the specified port
1110                  * ID.
1111                  */
1112                 list_for_each_entry(fcport, &ha->fcports, list) {
1113                     if (rscn_pid.b24 == fcport->d_id.b24) {
1114                             remote_fcport = fcport;
1115                             break;
1116                     }
1117                 }
1118                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1119                     if (rscn_pid.b24 == fcport->d_id.b24) {
1120                             rscn_fcport = fcport;
1121                             break;
1122                     }
1123                 }
1124                 if (remote_fcport == NULL)
1125                     remote_fcport = rscn_fcport;
1126         }
1127
1128         /*
1129          * If the port is already in our fcport list and online, send an ADISC
1130          * to see if it's still alive.  Issue login if a new fcport or the known
1131          * fcport is currently offline.
1132          */
1133         if (remote_fcport) {
1134                 /*
1135                  * No need to send request if the remote fcport is currently
1136                  * waiting for an available io descriptor.
1137                  */
1138                 if (known_fcport == NULL &&
1139                     (remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1140                     remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
1141                         /*
1142                          * If previous waiting io descriptor is an ADISC, then
1143                          * the new RSCN may come from a new remote fcport being
1144                          * plugged into the same location.
1145                          */
1146                         if (remote_fcport->port_type == FCT_RSCN) {
1147                             remote_fcport->iodesc_idx_sent =
1148                                 IODESC_LOGIN_NEEDED;
1149                         } else if (remote_fcport->iodesc_idx_sent ==
1150                             IODESC_ADISC_NEEDED) {
1151                                 fc_port_t *new_fcport;
1152
1153                                 remote_fcport->iodesc_idx_sent =
1154                                     IODESC_INVALID_INDEX;
1155
1156                                 /* Create new fcport for later login. */
1157                                 new_fcport = qla2x00_alloc_rscn_fcport(ha,
1158                                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1159                                 if (new_fcport) {
1160                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1161                                             "-- creating RSCN fcport %p for "
1162                                             "future login.\n", ha->host_no,
1163                                             new_fcport));
1164
1165                                         new_fcport->d_id.b24 =
1166                                             remote_fcport->d_id.b24;
1167                                         new_fcport->iodesc_idx_sent =
1168                                             IODESC_LOGIN_NEEDED;
1169
1170                                         list_add_tail(&new_fcport->list,
1171                                             &ha->rscn_fcports);
1172                                         set_bit(IODESC_PROCESS_NEEDED,
1173                                             &ha->dpc_flags);
1174                                 } else {
1175                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1176                                             "-- unable to allocate RSCN fcport "
1177                                             "for future login.\n",
1178                                             ha->host_no));
1179                                 }
1180                         }
1181                         return (QLA_SUCCESS);
1182                 }
1183
1184                 /* Send ADISC if the fcport is online */
1185                 if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
1186                     remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {
1187
1188                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1189
1190                         iodesc = qla2x00_alloc_iodesc(ha);
1191                         if (iodesc == NULL) {
1192                                 /* Mark fcport for later adisc processing */
1193                                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
1194                                     "enough IO descriptors for Adisc, flag "
1195                                     "for later processing.\n", ha->host_no));
1196
1197                                 remote_fcport->iodesc_idx_sent =
1198                                     IODESC_ADISC_NEEDED;
1199                                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1200
1201                                 return (QLA_SUCCESS);
1202                         }
1203
1204                         iodesc->cb_idx = ADISC_PORT_IOCB_CB;
1205                         iodesc->d_id.b24 = rscn_pid.b24;
1206                         iodesc->remote_fcport = remote_fcport;
1207                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1208                         qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);
1209
1210                         return (QLA_SUCCESS);
1211                 } else if (remote_fcport->iodesc_idx_sent <
1212                     MAX_IO_DESCRIPTORS &&
1213                     ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
1214                     ADISC_PORT_IOCB_CB) {
1215                         /*
1216                          * Receiving another RSCN while an ADISC is pending,
1217                          * abort the IOCB.  Use the same descriptor for the
1218                          * abort.
1219                          */
1220                         uint32_t handle_to_abort;
1221
1222                         iodesc = &ha->io_descriptors[
1223                                 remote_fcport->iodesc_idx_sent];
1224                         qla2x00_remove_iodesc_timer(iodesc);
1225                         handle_to_abort = iodesc->signature;
1226                         iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
1227                         iodesc->cb_idx = ABORT_IOCB_CB;
1228                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
1229                         iodesc->remote_fcport = remote_fcport;
1230                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1231
1232                         DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
1233                             "abort to outstanding Adisc [%x/%02x%02x%02x].\n",
1234                             ha->host_no, remote_fcport->loop_id,
1235                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1236                             iodesc->d_id.b.al_pa));
1237
1238                         qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
1239                             ha_locked);
1240                 }
1241         }
1242
1243         /* We need to login to the remote port, find it. */
1244         if (known_fcport) {
1245                 remote_fcport = known_fcport;
1246         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1247             rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
1248             ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
1249             LOGIN_PORT_IOCB_CB) {
1250                 /*
1251                  * Ignore duplicate RSCN on fcport which has already
1252                  * initiated a login IOCB.
1253                  */
1254                 DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
1255                     "already sent to [%02x%02x%02x].\n", ha->host_no,
1256                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1257                     rscn_fcport->d_id.b.al_pa));
1258
1259                 return (QLA_SUCCESS);
1260         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1261             rscn_fcport != remote_fcport) {
1262                 /* Reuse same rscn fcport. */
1263                 DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
1264                     "[%02x%02x%02x].\n", ha->host_no,
1265                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1266                     rscn_fcport->d_id.b.al_pa));
1267
1268                 remote_fcport = rscn_fcport;
1269         } else {
1270                 /* Create new fcport for later login. */
1271                 remote_fcport = qla2x00_alloc_rscn_fcport(ha,
1272                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1273                 list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
1274         }
1275         if (remote_fcport == NULL)
1276                 return (QLA_SUCCESS);
1277
1278         /* Prepare fcport for login. */
1279         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1280         remote_fcport->login_retry = 3; /* ha->login_retry_count; */
1281         remote_fcport->d_id.b24 = rscn_pid.b24;
1282
1283         iodesc = qla2x00_alloc_iodesc(ha);
1284         if (iodesc == NULL) {
1285                 /* Mark fcport for later adisc processing. */
1286                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
1287                     "descriptors for Login, flag for later processing.\n",
1288                     ha->host_no));
1289
1290                 remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
1291                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1292
1293                 return (QLA_SUCCESS);
1294         }
1295
1296         if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
1297                 remote_fcport->loop_id = ha->min_external_loopid;
1298
1299                 rval = qla2x00_find_new_loop_id(ha, remote_fcport);
1300                 if (rval == QLA_FUNCTION_FAILED) {
1301                         /* No more loop ids, failed. */
1302                         DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
1303                             "loop id to perform Login, failed.\n",
1304                             ha->host_no));
1305
1306                         return (rval);
1307                 }
1308         }
1309
1310         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
1311         iodesc->d_id.b24 = rscn_pid.b24;
1312         iodesc->remote_fcport = remote_fcport;
1313         remote_fcport->iodesc_idx_sent = iodesc->idx;
1314
1315         DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
1316             "[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
1317             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));
1318
1319         qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);
1320
1321         return (QLA_SUCCESS);
1322 }
1323
1324 /**
1325  * qla2x00_process_iodesc() - Complete IO descriptor processing.
1326  * @ha: HA context
1327  * @mbxstat: Mailbox IOCB status
1328  */
1329 void
1330 qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
1331 {
1332         int rval;
1333         uint32_t signature;
1334         fc_port_t *fcport;
1335         struct io_descriptor *iodesc;
1336
1337         signature = mbxstat->handle;
1338
1339         DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
1340             ha->host_no, signature));
1341
1342         /* Retrieve proper IO descriptor. */
1343         iodesc = qla2x00_handle_to_iodesc(ha, signature);
1344         if (iodesc == NULL) {
1345                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1346                     "incorrect signature %08x.\n", ha->host_no, signature));
1347
1348                 return;
1349         }
1350
1351         /* Stop IO descriptor timer. */
1352         qla2x00_remove_iodesc_timer(iodesc);
1353
1354         /* Verify signature match. */
1355         if (iodesc->signature != signature) {
1356                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1357                     "signature mismatch, sent %08x, received %08x.\n",
1358                     ha->host_no, iodesc->signature, signature));
1359
1360                 return;
1361         }
1362
1363         /* Go with IOCB callback. */
1364         rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
1365         if (rval != QLA_SUCCESS) {
1366                 /* IO descriptor reused by callback. */
1367                 return;
1368         }
1369
1370         qla2x00_free_iodesc(iodesc);
1371
1372         if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
1373                 /* Scan our fcports list for any RSCN requests. */
1374                 list_for_each_entry(fcport, &ha->fcports, list) {
1375                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1376                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1377                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1378                                 return;
1379                         }
1380                 }
1381
1382                 /* Scan our RSCN fcports list for any RSCN requests. */
1383                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1384                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1385                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1386                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1387                                 return;
1388                         }
1389                 }
1390         }
1391         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1392 }
1393
1394 /**
1395  * qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
1396  * @ha: HA context
1397  *
1398  * This routine will also delete any RSCN entries related to the outstanding
1399  * IO descriptors.
1400  */
1401 void
1402 qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
1403 {
1404         fc_port_t *fcport, *fcptemp;
1405
1406         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1407
1408         /* Abort all IO descriptors. */
1409         qla2x00_init_io_descriptors(ha);
1410
1411         /* Reset all pending IO descriptors in fcports list. */
1412         list_for_each_entry(fcport, &ha->fcports, list) {
1413                 fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
1414         }
1415
1416         /* Reset all pending IO descriptors in rscn fcports list. */
1417         list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
1418                 DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
1419                     "%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
1420                     fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
1421                     fcport->d_id.b.al_pa));
1422
1423                 list_del(&fcport->list);
1424                 kfree(fcport);
1425         }
1426 }