err.no 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 }
 322
 323
 324 /**
 325  * Mailbox IOCB commands.
 326  **/
 327
 328 /**
 329  * qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
 330  * @ha: HA context
 331  * @handle: handle to io descriptor
 332  *
 333  * Returns a pointer to the reqest entry, or NULL, if none were available.
 334  */
 335 static inline struct mbx_entry *
 336 qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
 337 {
 338         uint16_t cnt;
 339         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 340         struct mbx_entry *mbxentry;
 341
 342         mbxentry = NULL;
 343
 344         if (ha->req_q_cnt < 3) {
 345                 cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
 346                 if  (ha->req_ring_index < cnt)
 347                         ha->req_q_cnt = cnt - ha->req_ring_index;
 348                 else
 349                         ha->req_q_cnt = ha->request_q_length -
 350                             (ha->req_ring_index - cnt);
 351         }
 352         if (ha->req_q_cnt >= 3) {
 353                 mbxentry = (struct mbx_entry *)ha->request_ring_ptr;
 354
 355                 memset(mbxentry, 0, sizeof(struct mbx_entry));
 356                 mbxentry->entry_type = MBX_IOCB_TYPE;
 357                 mbxentry->entry_count = 1;
 358                 mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
 359                 mbxentry->handle = handle;
 360         }
 361         return (mbxentry);
 362 }
 363
 364 /**
 365  * qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
 366  * @ha: HA context
 367  * @iodesc: io descriptor
 368  * @handle_to_abort: firmware handle to abort
 369  * @ha_locked: is function called with the hardware lock
 370  *
 371  * Returns QLA_SUCCESS if the IOCB was issued.
 372  */
 373 static int
 374 qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 375     uint32_t handle_to_abort, int ha_locked)
 376 {
 377         unsigned long flags = 0;
 378         struct mbx_entry *mbxentry;
 379
 380         /* Send marker if required. */
 381         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 382                 return (QLA_FUNCTION_FAILED);
 383
 384         if (!ha_locked)
 385                 spin_lock_irqsave(&ha->hardware_lock, flags);
 386
 387         /* Build abort mailbox IOCB. */
 388         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 389         if (mbxentry == NULL) {
 390                 if (!ha_locked)
 391                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 392
 393                 return (QLA_FUNCTION_FAILED);
 394         }
 395         mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
 396         mbxentry->mb1 = mbxentry->loop_id.extended =
 397             cpu_to_le16(iodesc->remote_fcport->loop_id);
 398         mbxentry->mb2 = LSW(handle_to_abort);
 399         mbxentry->mb3 = MSW(handle_to_abort);
 400         wmb();
 401
 402         qla2x00_add_iodesc_timer(iodesc);
 403
 404         /* Issue command to ISP. */
 405         qla2x00_isp_cmd(ha);
 406
 407         if (!ha_locked)
 408                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 409
 410         DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
 411             "%08x.\n", ha->host_no, iodesc->signature,
 412             iodesc->remote_fcport->loop_id, handle_to_abort));
 413
 414         return (QLA_SUCCESS);
 415 }
 416
 417 /**
 418  * qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
 419  * @ha: HA context
 420  * @iodesc: io descriptor
 421  * @mbxstat: mailbox status IOCB
 422  *
 423  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 424  * will be used for a retry.
 425  */
 426 static int
 427 qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 428     struct mbx_entry *mbxstat)
 429 {
 430         DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
 431             "status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
 432             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
 433             le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 434
 435         return (QLA_SUCCESS);
 436 }
 437
 438
 439 /**
 440  * qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
 441  * @ha: HA context
 442  * @iodesc: io descriptor
 443  * @ha_locked: is function called with the hardware lock
 444  *
 445  * Returns QLA_SUCCESS if the IOCB was issued.
 446  */
 447 static int
 448 qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 449     int ha_locked)
 450 {
 451         unsigned long flags = 0;
 452         struct mbx_entry *mbxentry;
 453
 454         /* Send marker if required. */
 455         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 456                 return (QLA_FUNCTION_FAILED);
 457
 458         if (!ha_locked)
 459                 spin_lock_irqsave(&ha->hardware_lock, flags);
 460
 461         /* Build Get Port Database IOCB. */
 462         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 463         if (mbxentry == NULL) {
 464                 if (!ha_locked)
 465                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 466
 467                 return (QLA_FUNCTION_FAILED);
 468         }
 469         mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
 470         mbxentry->mb1 = mbxentry->loop_id.extended =
 471             cpu_to_le16(iodesc->remote_fcport->loop_id);
 472         mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
 473         mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
 474         mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
 475         mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
 476         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 477         wmb();
 478
 479         qla2x00_add_iodesc_timer(iodesc);
 480
 481         /* Issue command to ISP. */
 482         qla2x00_isp_cmd(ha);
 483
 484         if (!ha_locked)
 485                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 486
 487         DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
 488             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 489
 490         return (QLA_SUCCESS);
 491 }
 492
 493 /**
 494  * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
 495  * @ha: HA context
 496  * @iodesc: io descriptor
 497  * @mbxstat: mailbox status IOCB
 498  *
 499  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 500  * will be used for a retry.
 501  */
 502 static int
 503 qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 504     struct mbx_entry *mbxstat)
 505 {
 506         fc_port_t *remote_fcport;
 507
 508         remote_fcport = iodesc->remote_fcport;
 509
 510         /* Ensure the port IDs are consistent. */
 511         if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
 512                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
 513                     "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
 514                     ha->host_no, remote_fcport->d_id.b.domain,
 515                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 516                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 517                     iodesc->d_id.b.al_pa));
 518
 519                 return (QLA_SUCCESS);
 520         }
 521
 522         /* Only process the last command. */
 523         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 524                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
 525                     "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
 526                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 527                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 528                     iodesc->idx));
 529
 530                 return (QLA_SUCCESS);
 531         }
 532
 533         if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
 534                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 535                     "[%x/%02x%02x%02x] online.\n", ha->host_no,
 536                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 537                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 538
 539                 atomic_set(&remote_fcport->state, FCS_ONLINE);
 540         } else {
 541                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 542                     "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
 543                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 544                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 545                     le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 546
 547                 if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
 548                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
 549         }
 550         remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 551
 552         return (QLA_SUCCESS);
 553 }
 554
 555
 556 /**
 557  * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
 558  * @ha: HA context
 559  * @iodesc: io descriptor
 560  * @ha_locked: is function called with the hardware lock
 561  *
 562  * Returns QLA_SUCCESS if the IOCB was issued.
 563  */
 564 static int
 565 qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 566     int ha_locked)
 567 {
 568         unsigned long flags = 0;
 569         struct mbx_entry *mbxentry;
 570
 571         /* Send marker if required. */
 572         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 573                 return (QLA_FUNCTION_FAILED);
 574
 575         if (!ha_locked)
 576                 spin_lock_irqsave(&ha->hardware_lock, flags);
 577
 578         /* Build fabric port logout mailbox IOCB. */
 579         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 580         if (mbxentry == NULL) {
 581                 if (!ha_locked)
 582                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 583
 584                 return (QLA_FUNCTION_FAILED);
 585         }
 586         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
 587         mbxentry->mb1 = mbxentry->loop_id.extended =
 588             cpu_to_le16(iodesc->remote_fcport->loop_id);
 589         wmb();
 590
 591         qla2x00_add_iodesc_timer(iodesc);
 592
 593         /* Issue command to ISP. */
 594         qla2x00_isp_cmd(ha);
 595
 596         if (!ha_locked)
 597                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 598
 599         DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
 600             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 601
 602         return (QLA_SUCCESS);
 603 }
 604
 605 /**
 606  * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
 607  * @ha: HA context
 608  * @iodesc: io descriptor
 609  * @mbxstat: mailbox status IOCB
 610  *
 611  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 612  * will be used for a retry.
 613  */
 614 static int
 615 qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 616     struct mbx_entry *mbxstat)
 617 {
 618         DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
 619             "status=%x mb0=%x mb1=%x.\n", ha->host_no,
 620             iodesc->remote_fcport->loop_id,
 621             iodesc->remote_fcport->d_id.b.domain,
 622             iodesc->remote_fcport->d_id.b.area,
 623             iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
 624             le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));
 625
 626         return (QLA_SUCCESS);
 627 }
 628
 629
 630 /**
 631  * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
 632  * @ha: HA context
 633  * @iodesc: io descriptor
 634  * @d_id: port id for device
 635  * @ha_locked: is function called with the hardware lock
 636  *
 637  * Returns QLA_SUCCESS if the IOCB was issued.
 638  */
 639 static int
 640 qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 641     port_id_t *d_id, int ha_locked)
 642 {
 643         unsigned long flags = 0;
 644         struct mbx_entry *mbxentry;
 645
 646         /* Send marker if required. */
 647         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 648                 return (QLA_FUNCTION_FAILED);
 649
 650         if (!ha_locked)
 651                 spin_lock_irqsave(&ha->hardware_lock, flags);
 652
 653         /* Build fabric port login mailbox IOCB. */
 654         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 655         if (mbxentry == NULL) {
 656                 if (!ha_locked)
 657                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 658
 659                 return (QLA_FUNCTION_FAILED);
 660         }
 661         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
 662         mbxentry->mb1 = mbxentry->loop_id.extended =
 663             cpu_to_le16(iodesc->remote_fcport->loop_id);
 664         mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
 665         mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
 666         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 667         wmb();
 668
 669         qla2x00_add_iodesc_timer(iodesc);
 670
 671         /* Issue command to ISP. */
 672         qla2x00_isp_cmd(ha);
 673
 674         if (!ha_locked)
 675                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 676
 677         DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
 678             "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
 679             iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
 680             d_id->b.al_pa));
 681
 682         return (QLA_SUCCESS);
 683 }
 684
 685 /**
 686  * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
 687  * @ha: HA context
 688  * @iodesc: io descriptor
 689  * @mbxstat: mailbox status IOCB
 690  *
 691  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 692  * will be used for a retry.
 693  */
 694 static int
 695 qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 696     struct mbx_entry *mbxstat)
 697 {
 698         int rval;
 699         fc_port_t *fcport, *remote_fcport, *exist_fcport;
 700         struct io_descriptor *abort_iodesc, *login_iodesc;
 701         uint16_t status, mb[8];
 702         uint16_t reuse;
 703         uint16_t remote_loopid;
 704         port_id_t remote_did, inuse_did;
 705
 706         remote_fcport = iodesc->remote_fcport;
 707
 708         /* Only process the last command. */
 709         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 710                 DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
 711                     "[%02x%02x%02x], expected %x, received %x.\n",
 712                     ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
 713                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 714                     iodesc->idx));
 715
 716                 /* Free RSCN fcport resources. */
 717                 if (remote_fcport->port_type == FCT_RSCN) {
 718                         DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
 719                             "fcport %p [%x/%02x%02x%02x] given ignored Login "
 720                             "IOCB.\n", ha->host_no, remote_fcport,
 721                             remote_fcport->loop_id,
 722                             remote_fcport->d_id.b.domain,
 723                             remote_fcport->d_id.b.area,
 724                             remote_fcport->d_id.b.al_pa));
 725
 726                         list_del(&remote_fcport->list);
 727                         kfree(remote_fcport);
 728                 }
 729                 return (QLA_SUCCESS);
 730         }
 731
 732         status = le16_to_cpu(mbxstat->status);
 733         mb[0] = le16_to_cpu(mbxstat->mb0);
 734         mb[1] = le16_to_cpu(mbxstat->mb1);
 735         mb[2] = le16_to_cpu(mbxstat->mb2);
 736         mb[6] = le16_to_cpu(mbxstat->mb6);
 737         mb[7] = le16_to_cpu(mbxstat->mb7);
 738
 739         /* Good status? */
 740         if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
 741             mb[0] == MBS_COMMAND_COMPLETE) {
 742
 743                 DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
 744                     "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
 745                     mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
 746                     mbxstat->port_name[2], mbxstat->port_name[3],
 747                     mbxstat->port_name[4], mbxstat->port_name[5],
 748                     mbxstat->port_name[6], mbxstat->port_name[7]));
 749
 750                 memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
 751                 memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);
 752
 753                 /* Is the device already in our fcports list? */
 754                 if (remote_fcport->port_type != FCT_RSCN) {
 755                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 756                             "[%x/%02x%02x%02x] online.\n", ha->host_no,
 757                             remote_fcport->loop_id,
 758                             remote_fcport->d_id.b.domain,
 759                             remote_fcport->d_id.b.area,
 760                             remote_fcport->d_id.b.al_pa));
 761
 762                         qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 763
 764                         return (QLA_SUCCESS);
 765                 }
 766
 767                 /* Does the RSCN portname already exist in our fcports list? */
 768                 exist_fcport = NULL;
 769                 list_for_each_entry(fcport, &ha->fcports, list) {
 770                         if (memcmp(remote_fcport->port_name, fcport->port_name,
 771                             WWN_SIZE) == 0) {
 772                                 exist_fcport = fcport;
 773                                 break;
 774                         }
 775                 }
 776                 if (exist_fcport != NULL) {
 777                         DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
 778                             "fcport in fcports list [%p].\n", ha->host_no,
 779                             exist_fcport));
 780
 781                         /* Abort any ADISC that could have been sent. */
 782                         if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
 783                             exist_fcport->iodesc_idx_sent <
 784                             MAX_IO_DESCRIPTORS &&
 785                             ha->io_descriptors[exist_fcport->iodesc_idx_sent].
 786                             cb_idx == ADISC_PORT_IOCB_CB) {
 787
 788                                 abort_iodesc = qla2x00_alloc_iodesc(ha);
 789                                 if (abort_iodesc) {
 790                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 791                                             "-- issuing abort to outstanding "
 792                                             "Adisc [%x/%02x%02x%02x].\n",
 793                                             ha->host_no, remote_fcport->loop_id,
 794                                             exist_fcport->d_id.b.domain,
 795                                             exist_fcport->d_id.b.area,
 796                                             exist_fcport->d_id.b.al_pa));
 797
 798                                         abort_iodesc->cb_idx = ABORT_IOCB_CB;
 799                                         abort_iodesc->d_id.b24 =
 800                                             exist_fcport->d_id.b24;
 801                                         abort_iodesc->remote_fcport =
 802                                             exist_fcport;
 803                                         exist_fcport->iodesc_idx_sent =
 804                                             abort_iodesc->idx;
 805                                         qla2x00_send_abort_iocb(ha,
 806                                             abort_iodesc, ha->io_descriptors[
 807                                              exist_fcport->iodesc_idx_sent].
 808                                               signature, 1);
 809                                 } else {
 810                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 811                                             "-- unable to abort outstanding "
 812                                             "Adisc [%x/%02x%02x%02x].\n",
 813                                             ha->host_no, remote_fcport->loop_id,
 814                                             exist_fcport->d_id.b.domain,
 815                                             exist_fcport->d_id.b.area,
 816                                             exist_fcport->d_id.b.al_pa));
 817                                 }
 818                         }
 819
 820                         /*
 821                          * If the existing fcport is waiting to send an ADISC
 822                          * or LOGIN, then reuse remote fcport (RSCN) to
 823                          * continue waiting.
 824                          */
 825                         reuse = 0;
 826                         remote_loopid = remote_fcport->loop_id;
 827                         remote_did.b24 = remote_fcport->d_id.b24;
 828                         if (exist_fcport->iodesc_idx_sent ==
 829                             IODESC_ADISC_NEEDED ||
 830                             exist_fcport->iodesc_idx_sent ==
 831                             IODESC_LOGIN_NEEDED) {
 832                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 833                                     "existing fcport [%x/%02x%02x%02x] "
 834                                     "waiting for IO descriptor, reuse RSCN "
 835                                     "fcport.\n", ha->host_no,
 836                                     exist_fcport->loop_id,
 837                                     exist_fcport->d_id.b.domain,
 838                                     exist_fcport->d_id.b.area,
 839                                     exist_fcport->d_id.b.al_pa));
 840
 841                                 reuse++;
 842                                 remote_fcport->iodesc_idx_sent =
 843                                     exist_fcport->iodesc_idx_sent;
 844                                 exist_fcport->iodesc_idx_sent =
 845                                     IODESC_INVALID_INDEX;
 846                                 remote_fcport->loop_id = exist_fcport->loop_id;
 847                                 remote_fcport->d_id.b24 =
 848                                     exist_fcport->d_id.b24;
 849                         }
 850
 851                         /* Logout the old loopid. */
 852                         if (!reuse &&
 853                             exist_fcport->loop_id != remote_fcport->loop_id &&
 854                             exist_fcport->loop_id != FC_NO_LOOP_ID) {
 855                                 login_iodesc = qla2x00_alloc_iodesc(ha);
 856                                 if (login_iodesc) {
 857                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 858                                             "-- issuing logout to free old "
 859                                             "loop id [%x/%02x%02x%02x].\n",
 860                                             ha->host_no, exist_fcport->loop_id,
 861                                             exist_fcport->d_id.b.domain,
 862                                             exist_fcport->d_id.b.area,
 863                                             exist_fcport->d_id.b.al_pa));
 864
 865                                         login_iodesc->cb_idx =
 866                                             LOGOUT_PORT_IOCB_CB;
 867                                         login_iodesc->d_id.b24 =
 868                                             exist_fcport->d_id.b24;
 869                                         login_iodesc->remote_fcport =
 870                                             exist_fcport;
 871                                         exist_fcport->iodesc_idx_sent =
 872                                             login_iodesc->idx;
 873                                         qla2x00_send_logout_iocb(ha,
 874                                             login_iodesc, 1);
 875                                 } else {
 876                                         /* Ran out of IO descriptiors. */
 877                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 878                                             "-- unable to logout to free old "
 879                                             "loop id [%x/%02x%02x%02x].\n",
 880                                             ha->host_no, exist_fcport->loop_id,
 881                                             exist_fcport->d_id.b.domain,
 882                                             exist_fcport->d_id.b.area,
 883                                             exist_fcport->d_id.b.al_pa));
 884
 885                                         exist_fcport->iodesc_idx_sent =
 886                                             IODESC_INVALID_INDEX;
 887                                 }
 888
 889                         }
 890
 891                         /* Update existing fcport with remote fcport info. */
 892                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 893                             "existing fcport [%x/%02x%02x%02x] online.\n",
 894                             ha->host_no, remote_loopid, remote_did.b.domain,
 895                             remote_did.b.area, remote_did.b.al_pa));
 896
 897                         memcpy(exist_fcport->node_name,
 898                             remote_fcport->node_name, WWN_SIZE);
 899                         exist_fcport->loop_id = remote_loopid;
 900                         exist_fcport->d_id.b24 = remote_did.b24;
 901                         qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);
 902
 903                         /* Finally, free the remote (RSCN) fcport. */
 904                         if (!reuse) {
 905                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 906                                     "Freeing RSCN fcport %p "
 907                                     "[%x/%02x%02x%02x].\n", ha->host_no,
 908                                     remote_fcport, remote_fcport->loop_id,
 909                                     remote_fcport->d_id.b.domain,
 910                                     remote_fcport->d_id.b.area,
 911                                     remote_fcport->d_id.b.al_pa));
 912
 913                                 list_del(&remote_fcport->list);
 914                                 kfree(remote_fcport);
 915                         }
 916
 917                         return (QLA_SUCCESS);
 918                 }
 919
 920                 /*
 921                  * A new device has been added, move the RSCN fcport to our
 922                  * fcports list.
 923                  */
 924                 DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
 925                     "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
 926                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 927                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 928
 929                 list_del(&remote_fcport->list);
 930                 remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
 931                 qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 932                 list_add_tail(&remote_fcport->list, &ha->fcports);
 933                 set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
 934         } else {
 935                 /* Handle login failure. */
 936                 if (remote_fcport->login_retry != 0) {
 937                         if (mb[0] == MBS_LOOP_ID_USED) {
 938                                 inuse_did.b.domain = LSB(mb[1]);
 939                                 inuse_did.b.area = MSB(mb[2]);
 940                                 inuse_did.b.al_pa = LSB(mb[2]);
 941
 942                                 DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
 943                                     "id [%x] used by port id [%02x%02x%02x].\n",
 944                                     ha->host_no, remote_fcport->loop_id,
 945                                     inuse_did.b.domain, inuse_did.b.area,
 946                                     inuse_did.b.al_pa));
 947
 948                                 if (remote_fcport->d_id.b24 ==
 949                                     INVALID_PORT_ID) {
 950                                         /*
 951                                          * Invalid port id means we are trying
 952                                          * to login to a remote port with just
 953                                          * a loop id without knowing about the
 954                                          * port id.  Copy the port id and try
 955                                          * again.
 956                                          */
 957                                         remote_fcport->d_id.b24 = inuse_did.b24;
 958                                         iodesc->d_id.b24 = inuse_did.b24;
 959                                 } else {
 960                                         remote_fcport->loop_id++;
 961                                         rval = qla2x00_find_new_loop_id(ha,
 962                                             remote_fcport);
 963                                         if (rval == QLA_FUNCTION_FAILED) {
 964                                                 /* No more loop ids. */
 965                                                 return (QLA_SUCCESS);
 966                                         }
 967                                 }
 968                         } else if (mb[0] == MBS_PORT_ID_USED) {
 969                                 /*
 970                                  * Device has another loop ID.  The firmware
 971                                  * group recommends the driver perform an
 972                                  * implicit login with the specified ID.
 973                                  */
 974                                 DEBUG14(printk("scsi(%ld): Login IOCB -- port "
 975                                     "id [%02x%02x%02x] already assigned to "
 976                                     "loop id [%x].\n", ha->host_no,
 977                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 978                                     iodesc->d_id.b.al_pa, mb[1]));
 979
 980                                 remote_fcport->loop_id = mb[1];
 981
 982                         } else {
 983                                 /* Unable to perform login, try again. */
 984                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 985                                     "failed login [%x/%02x%02x%02x], status=%x "
 986                                     "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
 987                                     ha->host_no, remote_fcport->loop_id,
 988                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 989                                     iodesc->d_id.b.al_pa, status, mb[0], mb[1],
 990                                     mb[2], mb[6], mb[7]));
 991                         }
 992
 993                         /* Reissue Login with the same IO descriptor. */
 994                         iodesc->signature =
 995                             qla2x00_iodesc_to_handle(iodesc);
 996                         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
 997                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
 998                         remote_fcport->iodesc_idx_sent = iodesc->idx;
 999                         remote_fcport->login_retry--;
1000
1001                         DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
1002                             "login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
1003                             remote_fcport->loop_id,
1004                             remote_fcport->d_id.b.domain,
1005                             remote_fcport->d_id.b.area,
1006                             remote_fcport->d_id.b.al_pa,
1007                             remote_fcport->login_retry));
1008
1009                         qla2x00_send_login_iocb(ha, iodesc,
1010                             &remote_fcport->d_id, 1);
1011
1012                         return (QLA_FUNCTION_FAILED);
1013                 } else {
1014                         /* No more logins, mark device dead. */
1015                         DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
1016                             "login [%x/%02x%02x%02x] after retries, status=%x "
1017                             "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
1018                             ha->host_no, remote_fcport->loop_id,
1019                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1020                             iodesc->d_id.b.al_pa, status, mb[0], mb[1],
1021                             mb[2], mb[6], mb[7]));
1022
1023                         atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
1024                         if (remote_fcport->port_type == FCT_RSCN) {
1025                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
1026                                     "Freeing dead RSCN fcport %p "
1027                                     "[%x/%02x%02x%02x].\n", ha->host_no,
1028                                     remote_fcport, remote_fcport->loop_id,
1029                                     remote_fcport->d_id.b.domain,
1030                                     remote_fcport->d_id.b.area,
1031                                     remote_fcport->d_id.b.al_pa));
1032
1033                                 list_del(&remote_fcport->list);
1034                                 kfree(remote_fcport);
1035                         }
1036                 }
1037         }
1038
1039         return (QLA_SUCCESS);
1040 }
1041
1042
1043 /**
1044  * IO descriptor processing routines.
1045  **/
1046
1047 /**
1048  * qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
1049  * @ha: HA context
1050  * @flags: allocation flags
1051  *
1052  * Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
1053  */
1054 fc_port_t *
1055 qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, gfp_t flags)
1056 {
1057         fc_port_t *fcport;
1058
1059         fcport = qla2x00_alloc_fcport(ha, flags);
1060         if (fcport == NULL)
1061                 return (fcport);
1062
1063         /* Setup RSCN fcport structure. */
1064         fcport->port_type = FCT_RSCN;
1065
1066         return (fcport);
1067 }
1068
1069 /**
1070  * qla2x00_handle_port_rscn() - Handle port RSCN.
1071  * @ha: HA context
1072  * @rscn_entry: RSCN entry
1073  * @fcport: fcport entry to updated
1074  *
1075  * Returns QLA_SUCCESS if the port RSCN was handled.
1076  */
1077 int
1078 qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
1079     fc_port_t *known_fcport, int ha_locked)
1080 {
1081         int     rval;
1082         port_id_t rscn_pid;
1083         fc_port_t *fcport, *remote_fcport, *rscn_fcport;
1084         struct io_descriptor *iodesc;
1085
1086         remote_fcport = NULL;
1087         rscn_fcport = NULL;
1088
1089         /* Prepare port id based on incoming entries. */
1090         if (known_fcport) {
1091                 rscn_pid.b24 = known_fcport->d_id.b24;
1092                 remote_fcport = known_fcport;
1093
1094                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1095                     "fcport [%02x%02x%02x].\n", ha->host_no,
1096                     remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
1097                     remote_fcport->d_id.b.al_pa));
1098         } else {
1099                 rscn_pid.b.domain = LSB(MSW(rscn_entry));
1100                 rscn_pid.b.area = MSB(LSW(rscn_entry));
1101                 rscn_pid.b.al_pa = LSB(LSW(rscn_entry));
1102
1103                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1104                     "port id [%02x%02x%02x].\n", ha->host_no,
1105                     rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));
1106
1107                 /*
1108                  * Search fcport lists for a known entry at the specified port
1109                  * ID.
1110                  */
1111                 list_for_each_entry(fcport, &ha->fcports, list) {
1112                     if (rscn_pid.b24 == fcport->d_id.b24) {
1113                             remote_fcport = fcport;
1114                             break;
1115                     }
1116                 }
1117                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1118                     if (rscn_pid.b24 == fcport->d_id.b24) {
1119                             rscn_fcport = fcport;
1120                             break;
1121                     }
1122                 }
1123                 if (remote_fcport == NULL)
1124                     remote_fcport = rscn_fcport;
1125         }
1126
1127         /*
1128          * If the port is already in our fcport list and online, send an ADISC
1129          * to see if it's still alive.  Issue login if a new fcport or the known
1130          * fcport is currently offline.
1131          */
1132         if (remote_fcport) {
1133                 /*
1134                  * No need to send request if the remote fcport is currently
1135                  * waiting for an available io descriptor.
1136                  */
1137                 if (known_fcport == NULL &&
1138                     (remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1139                     remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
1140                         /*
1141                          * If previous waiting io descriptor is an ADISC, then
1142                          * the new RSCN may come from a new remote fcport being
1143                          * plugged into the same location.
1144                          */
1145                         if (remote_fcport->port_type == FCT_RSCN) {
1146                             remote_fcport->iodesc_idx_sent =
1147                                 IODESC_LOGIN_NEEDED;
1148                         } else if (remote_fcport->iodesc_idx_sent ==
1149                             IODESC_ADISC_NEEDED) {
1150                                 fc_port_t *new_fcport;
1151
1152                                 remote_fcport->iodesc_idx_sent =
1153                                     IODESC_INVALID_INDEX;
1154
1155                                 /* Create new fcport for later login. */
1156                                 new_fcport = qla2x00_alloc_rscn_fcport(ha,
1157                                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1158                                 if (new_fcport) {
1159                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1160                                             "-- creating RSCN fcport %p for "
1161                                             "future login.\n", ha->host_no,
1162                                             new_fcport));
1163
1164                                         new_fcport->d_id.b24 =
1165                                             remote_fcport->d_id.b24;
1166                                         new_fcport->iodesc_idx_sent =
1167                                             IODESC_LOGIN_NEEDED;
1168
1169                                         list_add_tail(&new_fcport->list,
1170                                             &ha->rscn_fcports);
1171                                         set_bit(IODESC_PROCESS_NEEDED,
1172                                             &ha->dpc_flags);
1173                                 } else {
1174                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1175                                             "-- unable to allocate RSCN fcport "
1176                                             "for future login.\n",
1177                                             ha->host_no));
1178                                 }
1179                         }
1180                         return (QLA_SUCCESS);
1181                 }
1182
1183                 /* Send ADISC if the fcport is online */
1184                 if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
1185                     remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {
1186
1187                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1188
1189                         iodesc = qla2x00_alloc_iodesc(ha);
1190                         if (iodesc == NULL) {
1191                                 /* Mark fcport for later adisc processing */
1192                                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
1193                                     "enough IO descriptors for Adisc, flag "
1194                                     "for later processing.\n", ha->host_no));
1195
1196                                 remote_fcport->iodesc_idx_sent =
1197                                     IODESC_ADISC_NEEDED;
1198                                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1199
1200                                 return (QLA_SUCCESS);
1201                         }
1202
1203                         iodesc->cb_idx = ADISC_PORT_IOCB_CB;
1204                         iodesc->d_id.b24 = rscn_pid.b24;
1205                         iodesc->remote_fcport = remote_fcport;
1206                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1207                         qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);
1208
1209                         return (QLA_SUCCESS);
1210                 } else if (remote_fcport->iodesc_idx_sent <
1211                     MAX_IO_DESCRIPTORS &&
1212                     ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
1213                     ADISC_PORT_IOCB_CB) {
1214                         /*
1215                          * Receiving another RSCN while an ADISC is pending,
1216                          * abort the IOCB.  Use the same descriptor for the
1217                          * abort.
1218                          */
1219                         uint32_t handle_to_abort;
1220
1221                         iodesc = &ha->io_descriptors[
1222                                 remote_fcport->iodesc_idx_sent];
1223                         qla2x00_remove_iodesc_timer(iodesc);
1224                         handle_to_abort = iodesc->signature;
1225                         iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
1226                         iodesc->cb_idx = ABORT_IOCB_CB;
1227                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
1228                         iodesc->remote_fcport = remote_fcport;
1229                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1230
1231                         DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
1232                             "abort to outstanding Adisc [%x/%02x%02x%02x].\n",
1233                             ha->host_no, remote_fcport->loop_id,
1234                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1235                             iodesc->d_id.b.al_pa));
1236
1237                         qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
1238                             ha_locked);
1239                 }
1240         }
1241
1242         /* We need to login to the remote port, find it. */
1243         if (known_fcport) {
1244                 remote_fcport = known_fcport;
1245         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1246             rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
1247             ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
1248             LOGIN_PORT_IOCB_CB) {
1249                 /*
1250                  * Ignore duplicate RSCN on fcport which has already
1251                  * initiated a login IOCB.
1252                  */
1253                 DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
1254                     "already sent to [%02x%02x%02x].\n", ha->host_no,
1255                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1256                     rscn_fcport->d_id.b.al_pa));
1257
1258                 return (QLA_SUCCESS);
1259         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1260             rscn_fcport != remote_fcport) {
1261                 /* Reuse same rscn fcport. */
1262                 DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
1263                     "[%02x%02x%02x].\n", ha->host_no,
1264                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1265                     rscn_fcport->d_id.b.al_pa));
1266
1267                 remote_fcport = rscn_fcport;
1268         } else {
1269                 /* Create new fcport for later login. */
1270                 remote_fcport = qla2x00_alloc_rscn_fcport(ha,
1271                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1272                 list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
1273         }
1274         if (remote_fcport == NULL)
1275                 return (QLA_SUCCESS);
1276
1277         /* Prepare fcport for login. */
1278         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1279         remote_fcport->login_retry = 3; /* ha->login_retry_count; */
1280         remote_fcport->d_id.b24 = rscn_pid.b24;
1281
1282         iodesc = qla2x00_alloc_iodesc(ha);
1283         if (iodesc == NULL) {
1284                 /* Mark fcport for later adisc processing. */
1285                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
1286                     "descriptors for Login, flag for later processing.\n",
1287                     ha->host_no));
1288
1289                 remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
1290                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1291
1292                 return (QLA_SUCCESS);
1293         }
1294
1295         if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
1296                 remote_fcport->loop_id = ha->min_external_loopid;
1297
1298                 rval = qla2x00_find_new_loop_id(ha, remote_fcport);
1299                 if (rval == QLA_FUNCTION_FAILED) {
1300                         /* No more loop ids, failed. */
1301                         DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
1302                             "loop id to perform Login, failed.\n",
1303                             ha->host_no));
1304
1305                         return (rval);
1306                 }
1307         }
1308
1309         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
1310         iodesc->d_id.b24 = rscn_pid.b24;
1311         iodesc->remote_fcport = remote_fcport;
1312         remote_fcport->iodesc_idx_sent = iodesc->idx;
1313
1314         DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
1315             "[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
1316             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));
1317
1318         qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);
1319
1320         return (QLA_SUCCESS);
1321 }
1322
1323 /**
1324  * qla2x00_process_iodesc() - Complete IO descriptor processing.
1325  * @ha: HA context
1326  * @mbxstat: Mailbox IOCB status
1327  */
1328 void
1329 qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
1330 {
1331         int rval;
1332         uint32_t signature;
1333         fc_port_t *fcport;
1334         struct io_descriptor *iodesc;
1335
1336         signature = mbxstat->handle;
1337
1338         DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
1339             ha->host_no, signature));
1340
1341         /* Retrieve proper IO descriptor. */
1342         iodesc = qla2x00_handle_to_iodesc(ha, signature);
1343         if (iodesc == NULL) {
1344                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1345                     "incorrect signature %08x.\n", ha->host_no, signature));
1346
1347                 return;
1348         }
1349
1350         /* Stop IO descriptor timer. */
1351         qla2x00_remove_iodesc_timer(iodesc);
1352
1353         /* Verify signature match. */
1354         if (iodesc->signature != signature) {
1355                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1356                     "signature mismatch, sent %08x, received %08x.\n",
1357                     ha->host_no, iodesc->signature, signature));
1358
1359                 return;
1360         }
1361
1362         /* Go with IOCB callback. */
1363         rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
1364         if (rval != QLA_SUCCESS) {
1365                 /* IO descriptor reused by callback. */
1366                 return;
1367         }
1368
1369         qla2x00_free_iodesc(iodesc);
1370
1371         if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
1372                 /* Scan our fcports list for any RSCN requests. */
1373                 list_for_each_entry(fcport, &ha->fcports, list) {
1374                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1375                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1376                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1377                                 return;
1378                         }
1379                 }
1380
1381                 /* Scan our RSCN fcports list for any RSCN requests. */
1382                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1383                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1384                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1385                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1386                                 return;
1387                         }
1388                 }
1389         }
1390         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1391 }
1392
1393 /**
1394  * qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
1395  * @ha: HA context
1396  *
1397  * This routine will also delete any RSCN entries related to the outstanding
1398  * IO descriptors.
1399  */
1400 void
1401 qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
1402 {
1403         fc_port_t *fcport, *fcptemp;
1404
1405         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1406
1407         /* Abort all IO descriptors. */
1408         qla2x00_init_io_descriptors(ha);
1409
1410         /* Reset all pending IO descriptors in fcports list. */
1411         list_for_each_entry(fcport, &ha->fcports, list) {
1412                 fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
1413         }
1414
1415         /* Reset all pending IO descriptors in rscn fcports list. */
1416         list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
1417                 DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
1418                     "%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
1419                     fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
1420                     fcport->d_id.b.al_pa));
1421
1422                 list_del(&fcport->list);
1423                 kfree(fcport);
1424         }
1425 }