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 #include <scsi/scsi_transport_fc.h>
  10
  11 /**
  12  * IO descriptor handle definitions.
  13  *
  14  * Signature form:
  15  *
  16  *      |31------28|27-------------------12|11-------0|
  17  *      |   Type   |   Rolling Signature   |   Index  |
  18  *      |----------|-----------------------|----------|
  19  *
  20  **/
  21
  22 #define HDL_TYPE_SCSI           0
  23 #define HDL_TYPE_ASYNC_IOCB     0x0A
  24
  25 #define HDL_INDEX_BITS  12
  26 #define HDL_ITER_BITS   16
  27 #define HDL_TYPE_BITS   4
  28
  29 #define HDL_INDEX_MASK  ((1UL << HDL_INDEX_BITS) - 1)
  30 #define HDL_ITER_MASK   ((1UL << HDL_ITER_BITS) - 1)
  31 #define HDL_TYPE_MASK   ((1UL << HDL_TYPE_BITS) - 1)
  32
  33 #define HDL_INDEX_SHIFT 0
  34 #define HDL_ITER_SHIFT  (HDL_INDEX_SHIFT + HDL_INDEX_BITS)
  35 #define HDL_TYPE_SHIFT  (HDL_ITER_SHIFT + HDL_ITER_BITS)
  36
  37 /* Local Prototypes. */
  38 static inline uint32_t qla2x00_to_handle(uint16_t, uint16_t, uint16_t);
  39 static inline uint16_t qla2x00_handle_to_idx(uint32_t);
  40 static inline uint32_t qla2x00_iodesc_to_handle(struct io_descriptor *);
  41 static inline struct io_descriptor *qla2x00_handle_to_iodesc(scsi_qla_host_t *,
  42     uint32_t);
  43
  44 static inline struct io_descriptor *qla2x00_alloc_iodesc(scsi_qla_host_t *);
  45 static inline void qla2x00_free_iodesc(struct io_descriptor *);
  46 static inline void qla2x00_init_io_descriptors(scsi_qla_host_t *);
  47
  48 static void qla2x00_iodesc_timeout(unsigned long);
  49 static inline void qla2x00_add_iodesc_timer(struct io_descriptor *);
  50 static inline void qla2x00_remove_iodesc_timer(struct io_descriptor *);
  51
  52 static inline void qla2x00_update_login_fcport(scsi_qla_host_t *,
  53     struct mbx_entry *, fc_port_t *);
  54
  55 static int qla2x00_send_abort_iocb(scsi_qla_host_t *, struct io_descriptor *,
  56     uint32_t, int);
  57 static int qla2x00_send_abort_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  58     struct mbx_entry *);
  59
  60 static int qla2x00_send_adisc_iocb(scsi_qla_host_t *, struct io_descriptor *,
  61     int);
  62 static int qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  63     struct mbx_entry *);
  64
  65 static int qla2x00_send_logout_iocb(scsi_qla_host_t *, struct io_descriptor *,
  66     int);
  67 static int qla2x00_send_logout_iocb_cb(scsi_qla_host_t *,
  68     struct io_descriptor *, struct mbx_entry *);
  69
  70 static int qla2x00_send_login_iocb(scsi_qla_host_t *, struct io_descriptor *,
  71     port_id_t *, int);
  72 static int qla2x00_send_login_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  73     struct mbx_entry *);
  74
  75 /**
  76  * Mailbox IOCB callback array.
  77  **/
  78 static int (*iocb_function_cb_list[LAST_IOCB_CB])
  79         (scsi_qla_host_t *, struct io_descriptor *, struct mbx_entry *) = {
  80
  81         qla2x00_send_abort_iocb_cb,
  82         qla2x00_send_adisc_iocb_cb,
  83         qla2x00_send_logout_iocb_cb,
  84         qla2x00_send_login_iocb_cb,
  85 };
  86
  87
  88 /**
  89  * Generic IO descriptor handle routines.
  90  **/
  91
  92 /**
  93  * qla2x00_to_handle() - Create a descriptor handle.
  94  * @type: descriptor type
  95  * @iter: descriptor rolling signature
  96  * @idx: index to the descriptor array
  97  *
  98  * Returns a composite handle based in the @type, @iter, and @idx.
  99  */
 100 static inline uint32_t
 101 qla2x00_to_handle(uint16_t type, uint16_t iter, uint16_t idx)
 102 {
 103         return ((uint32_t)(((uint32_t)type << HDL_TYPE_SHIFT) |
 104             ((uint32_t)iter << HDL_ITER_SHIFT) |
 105             ((uint32_t)idx << HDL_INDEX_SHIFT)));
 106 }
 107
 108 /**
 109  * qla2x00_handle_to_idx() - Retrive the index for a given handle.
 110  * @handle: descriptor handle
 111  *
 112  * Returns the index specified by the @handle.
 113  */
 114 static inline uint16_t
 115 qla2x00_handle_to_idx(uint32_t handle)
 116 {
 117         return ((uint16_t)(((handle) >> HDL_INDEX_SHIFT) & HDL_INDEX_MASK));
 118 }
 119
 120 /**
 121  * qla2x00_iodesc_to_handle() - Convert an IO descriptor to a unique handle.
 122  * @iodesc: io descriptor
 123  *
 124  * Returns a unique handle for @iodesc.
 125  */
 126 static inline uint32_t
 127 qla2x00_iodesc_to_handle(struct io_descriptor *iodesc)
 128 {
 129         uint32_t handle;
 130
 131         handle = qla2x00_to_handle(HDL_TYPE_ASYNC_IOCB,
 132             ++iodesc->ha->iodesc_signature, iodesc->idx);
 133         iodesc->signature = handle;
 134
 135         return (handle);
 136 }
 137
 138 /**
 139  * qla2x00_handle_to_iodesc() - Retrieve an IO descriptor given a unique handle.
 140  * @ha: HA context
 141  * @handle: handle to io descriptor
 142  *
 143  * Returns a pointer to the io descriptor, or NULL, if the io descriptor does
 144  * not exist or the io descriptors signature does not @handle.
 145  */
 146 static inline struct io_descriptor *
 147 qla2x00_handle_to_iodesc(scsi_qla_host_t *ha, uint32_t handle)
 148 {
 149         uint16_t idx;
 150         struct io_descriptor *iodesc;
 151
 152         idx = qla2x00_handle_to_idx(handle);
 153         iodesc = &ha->io_descriptors[idx];
 154         if (iodesc)
 155                 if (iodesc->signature != handle)
 156                         iodesc = NULL;
 157
 158         return (iodesc);
 159 }
 160
 161
 162 /**
 163  * IO descriptor allocation routines.
 164  **/
 165
 166 /**
 167  * qla2x00_alloc_iodesc() - Allocate an IO descriptor from the pool.
 168  * @ha: HA context
 169  *
 170  * Returns a pointer to the allocated io descriptor, or NULL, if none available.
 171  */
 172 static inline struct io_descriptor *
 173 qla2x00_alloc_iodesc(scsi_qla_host_t *ha)
 174 {
 175         uint16_t iter;
 176         struct io_descriptor *iodesc;
 177
 178         iodesc = NULL;
 179         for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
 180                 if (ha->io_descriptors[iter].used)
 181                         continue;
 182
 183                 iodesc = &ha->io_descriptors[iter];
 184                 iodesc->used = 1;
 185                 iodesc->idx = iter;
 186                 init_timer(&iodesc->timer);
 187                 iodesc->ha = ha;
 188                 iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
 189                 break;
 190         }
 191
 192         return (iodesc);
 193 }
 194
 195 /**
 196  * qla2x00_free_iodesc() - Free an IO descriptor.
 197  * @iodesc: io descriptor
 198  *
 199  * NOTE: The io descriptors timer *must* be stopped before it can be free'd.
 200  */
 201 static inline void
 202 qla2x00_free_iodesc(struct io_descriptor *iodesc)
 203 {
 204         iodesc->used = 0;
 205         iodesc->signature = 0;
 206 }
 207
 208 /**
 209  * qla2x00_remove_iodesc_timer() - Remove an active timer from an IO descriptor.
 210  * @iodesc: io descriptor
 211  */
 212 static inline void
 213 qla2x00_remove_iodesc_timer(struct io_descriptor *iodesc)
 214 {
 215         if (iodesc->timer.function != NULL) {
 216                 del_timer_sync(&iodesc->timer);
 217                 iodesc->timer.data = (unsigned long) NULL;
 218                 iodesc->timer.function = NULL;
 219         }
 220 }
 221
 222 /**
 223  * qla2x00_init_io_descriptors() - Initialize the pool of IO descriptors.
 224  * @ha: HA context
 225  */
 226 static inline void
 227 qla2x00_init_io_descriptors(scsi_qla_host_t *ha)
 228 {
 229         uint16_t iter;
 230
 231         for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
 232                 if (!ha->io_descriptors[iter].used)
 233                         continue;
 234
 235                 qla2x00_remove_iodesc_timer(&ha->io_descriptors[iter]);
 236                 qla2x00_free_iodesc(&ha->io_descriptors[iter]);
 237         }
 238 }
 239
 240
 241 /**
 242  * IO descriptor timer routines.
 243  **/
 244
 245 /**
 246  * qla2x00_iodesc_timeout() - Timeout IO descriptor handler.
 247  * @data: io descriptor
 248  */
 249 static void
 250 qla2x00_iodesc_timeout(unsigned long data)
 251 {
 252         struct io_descriptor *iodesc;
 253
 254         iodesc = (struct io_descriptor *) data;
 255
 256         DEBUG14(printk("scsi(%ld): IO descriptor timeout, index=%x "
 257             "signature=%08x, scheduling ISP abort.\n", iodesc->ha->host_no,
 258             iodesc->idx, iodesc->signature));
 259
 260         qla2x00_free_iodesc(iodesc);
 261
 262         qla_printk(KERN_WARNING, iodesc->ha,
 263             "IO descriptor timeout. Scheduling ISP abort.\n");
 264         set_bit(ISP_ABORT_NEEDED, &iodesc->ha->dpc_flags);
 265 }
 266
 267 /**
 268  * qla2x00_add_iodesc_timer() - Add and start a timer for an IO descriptor.
 269  * @iodesc: io descriptor
 270  *
 271  * NOTE:
 272  * The firmware shall timeout an outstanding mailbox IOCB in 2 * R_A_TOV (in
 273  * tenths of a second) after it hits the wire.  But, if there are any request
 274  * resource contraints (i.e. during heavy I/O), exchanges can be held off for
 275  * at most R_A_TOV.  Therefore, the driver will wait 4 * R_A_TOV before
 276  * scheduling a recovery (big hammer).
 277  */
 278 static inline void
 279 qla2x00_add_iodesc_timer(struct io_descriptor *iodesc)
 280 {
 281         unsigned long timeout;
 282
 283         timeout = (iodesc->ha->r_a_tov * 4) / 10;
 284         init_timer(&iodesc->timer);
 285         iodesc->timer.data = (unsigned long) iodesc;
 286         iodesc->timer.expires = jiffies + (timeout * HZ);
 287         iodesc->timer.function =
 288             (void (*) (unsigned long)) qla2x00_iodesc_timeout;
 289         add_timer(&iodesc->timer);
 290 }
 291
 292 /**
 293  * IO descriptor support routines.
 294  **/
 295
 296 /**
 297  * qla2x00_update_login_fcport() - Update fcport data after login processing.
 298  * @ha: HA context
 299  * @mbxstat: Mailbox command status IOCB
 300  * @fcport: port to update
 301  */
 302 static inline void
 303 qla2x00_update_login_fcport(scsi_qla_host_t *ha, struct mbx_entry *mbxstat,
 304     fc_port_t *fcport)
 305 {
 306         if (le16_to_cpu(mbxstat->mb1) & BIT_0) {
 307                 fcport->port_type = FCT_INITIATOR;
 308         } else {
 309                 fcport->port_type = FCT_TARGET;
 310                 if (le16_to_cpu(mbxstat->mb1) & BIT_1) {
 311                         fcport->flags |= FCF_TAPE_PRESENT;
 312                 }
 313         }
 314         fcport->login_retry = 0;
 315         fcport->port_login_retry_count = ha->port_down_retry_count *
 316             PORT_RETRY_TIME;
 317         atomic_set(&fcport->port_down_timer, ha->port_down_retry_count *
 318             PORT_RETRY_TIME);
 319         fcport->flags |= FCF_FABRIC_DEVICE;
 320         fcport->flags &= ~FCF_FAILOVER_NEEDED;
 321         fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 322         atomic_set(&fcport->state, FCS_ONLINE);
 323         schedule_work(&fcport->rport_add_work);
 324 }
 325
 326
 327 /**
 328  * Mailbox IOCB commands.
 329  **/
 330
 331 /**
 332  * qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
 333  * @ha: HA context
 334  * @handle: handle to io descriptor
 335  *
 336  * Returns a pointer to the reqest entry, or NULL, if none were available.
 337  */
 338 static inline struct mbx_entry *
 339 qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
 340 {
 341         uint16_t cnt;
 342         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 343         struct mbx_entry *mbxentry;
 344
 345         mbxentry = NULL;
 346
 347         if (ha->req_q_cnt < 3) {
 348                 cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
 349                 if  (ha->req_ring_index < cnt)
 350                         ha->req_q_cnt = cnt - ha->req_ring_index;
 351                 else
 352                         ha->req_q_cnt = ha->request_q_length -
 353                             (ha->req_ring_index - cnt);
 354         }
 355         if (ha->req_q_cnt >= 3) {
 356                 mbxentry = (struct mbx_entry *)ha->request_ring_ptr;
 357
 358                 memset(mbxentry, 0, sizeof(struct mbx_entry));
 359                 mbxentry->entry_type = MBX_IOCB_TYPE;
 360                 mbxentry->entry_count = 1;
 361                 mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
 362                 mbxentry->handle = handle;
 363         }
 364         return (mbxentry);
 365 }
 366
 367 /**
 368  * qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
 369  * @ha: HA context
 370  * @iodesc: io descriptor
 371  * @handle_to_abort: firmware handle to abort
 372  * @ha_locked: is function called with the hardware lock
 373  *
 374  * Returns QLA_SUCCESS if the IOCB was issued.
 375  */
 376 static int
 377 qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 378     uint32_t handle_to_abort, int ha_locked)
 379 {
 380         unsigned long flags = 0;
 381         struct mbx_entry *mbxentry;
 382
 383         /* Send marker if required. */
 384         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 385                 return (QLA_FUNCTION_FAILED);
 386
 387         if (!ha_locked)
 388                 spin_lock_irqsave(&ha->hardware_lock, flags);
 389
 390         /* Build abort mailbox IOCB. */
 391         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 392         if (mbxentry == NULL) {
 393                 if (!ha_locked)
 394                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 395
 396                 return (QLA_FUNCTION_FAILED);
 397         }
 398         mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
 399         mbxentry->mb1 = mbxentry->loop_id.extended =
 400             cpu_to_le16(iodesc->remote_fcport->loop_id);
 401         mbxentry->mb2 = LSW(handle_to_abort);
 402         mbxentry->mb3 = MSW(handle_to_abort);
 403         wmb();
 404
 405         qla2x00_add_iodesc_timer(iodesc);
 406
 407         /* Issue command to ISP. */
 408         qla2x00_isp_cmd(ha);
 409
 410         if (!ha_locked)
 411                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 412
 413         DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
 414             "%08x.\n", ha->host_no, iodesc->signature,
 415             iodesc->remote_fcport->loop_id, handle_to_abort));
 416
 417         return (QLA_SUCCESS);
 418 }
 419
 420 /**
 421  * qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
 422  * @ha: HA context
 423  * @iodesc: io descriptor
 424  * @mbxstat: mailbox status IOCB
 425  *
 426  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 427  * will be used for a retry.
 428  */
 429 static int
 430 qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 431     struct mbx_entry *mbxstat)
 432 {
 433         DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
 434             "status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
 435             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
 436             le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 437
 438         return (QLA_SUCCESS);
 439 }
 440
 441
 442 /**
 443  * qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
 444  * @ha: HA context
 445  * @iodesc: io descriptor
 446  * @ha_locked: is function called with the hardware lock
 447  *
 448  * Returns QLA_SUCCESS if the IOCB was issued.
 449  */
 450 static int
 451 qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 452     int ha_locked)
 453 {
 454         unsigned long flags = 0;
 455         struct mbx_entry *mbxentry;
 456
 457         /* Send marker if required. */
 458         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 459                 return (QLA_FUNCTION_FAILED);
 460
 461         if (!ha_locked)
 462                 spin_lock_irqsave(&ha->hardware_lock, flags);
 463
 464         /* Build Get Port Database IOCB. */
 465         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 466         if (mbxentry == NULL) {
 467                 if (!ha_locked)
 468                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 469
 470                 return (QLA_FUNCTION_FAILED);
 471         }
 472         mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
 473         mbxentry->mb1 = mbxentry->loop_id.extended =
 474             cpu_to_le16(iodesc->remote_fcport->loop_id);
 475         mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
 476         mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
 477         mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
 478         mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
 479         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 480         wmb();
 481
 482         qla2x00_add_iodesc_timer(iodesc);
 483
 484         /* Issue command to ISP. */
 485         qla2x00_isp_cmd(ha);
 486
 487         if (!ha_locked)
 488                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 489
 490         DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
 491             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 492
 493         return (QLA_SUCCESS);
 494 }
 495
 496 /**
 497  * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
 498  * @ha: HA context
 499  * @iodesc: io descriptor
 500  * @mbxstat: mailbox status IOCB
 501  *
 502  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 503  * will be used for a retry.
 504  */
 505 static int
 506 qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 507     struct mbx_entry *mbxstat)
 508 {
 509         fc_port_t *remote_fcport;
 510
 511         remote_fcport = iodesc->remote_fcport;
 512
 513         /* Ensure the port IDs are consistent. */
 514         if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
 515                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
 516                     "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
 517                     ha->host_no, remote_fcport->d_id.b.domain,
 518                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 519                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 520                     iodesc->d_id.b.al_pa));
 521
 522                 return (QLA_SUCCESS);
 523         }
 524
 525         /* Only process the last command. */
 526         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 527                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
 528                     "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
 529                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 530                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 531                     iodesc->idx));
 532
 533                 return (QLA_SUCCESS);
 534         }
 535
 536         if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
 537                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 538                     "[%x/%02x%02x%02x] online.\n", ha->host_no,
 539                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 540                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 541
 542                 atomic_set(&remote_fcport->state, FCS_ONLINE);
 543         } else {
 544                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 545                     "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
 546                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 547                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 548                     le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 549
 550                 if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
 551                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
 552         }
 553         remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 554
 555         return (QLA_SUCCESS);
 556 }
 557
 558
 559 /**
 560  * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
 561  * @ha: HA context
 562  * @iodesc: io descriptor
 563  * @ha_locked: is function called with the hardware lock
 564  *
 565  * Returns QLA_SUCCESS if the IOCB was issued.
 566  */
 567 static int
 568 qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 569     int ha_locked)
 570 {
 571         unsigned long flags = 0;
 572         struct mbx_entry *mbxentry;
 573
 574         /* Send marker if required. */
 575         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 576                 return (QLA_FUNCTION_FAILED);
 577
 578         if (!ha_locked)
 579                 spin_lock_irqsave(&ha->hardware_lock, flags);
 580
 581         /* Build fabric port logout mailbox IOCB. */
 582         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 583         if (mbxentry == NULL) {
 584                 if (!ha_locked)
 585                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 586
 587                 return (QLA_FUNCTION_FAILED);
 588         }
 589         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
 590         mbxentry->mb1 = mbxentry->loop_id.extended =
 591             cpu_to_le16(iodesc->remote_fcport->loop_id);
 592         wmb();
 593
 594         qla2x00_add_iodesc_timer(iodesc);
 595
 596         /* Issue command to ISP. */
 597         qla2x00_isp_cmd(ha);
 598
 599         if (!ha_locked)
 600                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 601
 602         DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
 603             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 604
 605         return (QLA_SUCCESS);
 606 }
 607
 608 /**
 609  * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
 610  * @ha: HA context
 611  * @iodesc: io descriptor
 612  * @mbxstat: mailbox status IOCB
 613  *
 614  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 615  * will be used for a retry.
 616  */
 617 static int
 618 qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 619     struct mbx_entry *mbxstat)
 620 {
 621         DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
 622             "status=%x mb0=%x mb1=%x.\n", ha->host_no,
 623             iodesc->remote_fcport->loop_id,
 624             iodesc->remote_fcport->d_id.b.domain,
 625             iodesc->remote_fcport->d_id.b.area,
 626             iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
 627             le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));
 628
 629         return (QLA_SUCCESS);
 630 }
 631
 632
 633 /**
 634  * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
 635  * @ha: HA context
 636  * @iodesc: io descriptor
 637  * @d_id: port id for device
 638  * @ha_locked: is function called with the hardware lock
 639  *
 640  * Returns QLA_SUCCESS if the IOCB was issued.
 641  */
 642 static int
 643 qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 644     port_id_t *d_id, int ha_locked)
 645 {
 646         unsigned long flags = 0;
 647         struct mbx_entry *mbxentry;
 648
 649         /* Send marker if required. */
 650         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 651                 return (QLA_FUNCTION_FAILED);
 652
 653         if (!ha_locked)
 654                 spin_lock_irqsave(&ha->hardware_lock, flags);
 655
 656         /* Build fabric port login mailbox IOCB. */
 657         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 658         if (mbxentry == NULL) {
 659                 if (!ha_locked)
 660                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 661
 662                 return (QLA_FUNCTION_FAILED);
 663         }
 664         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
 665         mbxentry->mb1 = mbxentry->loop_id.extended =
 666             cpu_to_le16(iodesc->remote_fcport->loop_id);
 667         mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
 668         mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
 669         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 670         wmb();
 671
 672         qla2x00_add_iodesc_timer(iodesc);
 673
 674         /* Issue command to ISP. */
 675         qla2x00_isp_cmd(ha);
 676
 677         if (!ha_locked)
 678                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 679
 680         DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
 681             "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
 682             iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
 683             d_id->b.al_pa));
 684
 685         return (QLA_SUCCESS);
 686 }
 687
 688 /**
 689  * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
 690  * @ha: HA context
 691  * @iodesc: io descriptor
 692  * @mbxstat: mailbox status IOCB
 693  *
 694  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 695  * will be used for a retry.
 696  */
 697 static int
 698 qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 699     struct mbx_entry *mbxstat)
 700 {
 701         int rval;
 702         fc_port_t *fcport, *remote_fcport, *exist_fcport;
 703         struct io_descriptor *abort_iodesc, *login_iodesc;
 704         uint16_t status, mb[8];
 705         uint16_t reuse;
 706         uint16_t remote_loopid;
 707         port_id_t remote_did, inuse_did;
 708
 709         remote_fcport = iodesc->remote_fcport;
 710
 711         /* Only process the last command. */
 712         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 713                 DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
 714                     "[%02x%02x%02x], expected %x, received %x.\n",
 715                     ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
 716                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 717                     iodesc->idx));
 718
 719                 /* Free RSCN fcport resources. */
 720                 if (remote_fcport->port_type == FCT_RSCN) {
 721                         DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
 722                             "fcport %p [%x/%02x%02x%02x] given ignored Login "
 723                             "IOCB.\n", ha->host_no, remote_fcport,
 724                             remote_fcport->loop_id,
 725                             remote_fcport->d_id.b.domain,
 726                             remote_fcport->d_id.b.area,
 727                             remote_fcport->d_id.b.al_pa));
 728
 729                         list_del(&remote_fcport->list);
 730                         kfree(remote_fcport);
 731                 }
 732                 return (QLA_SUCCESS);
 733         }
 734
 735         status = le16_to_cpu(mbxstat->status);
 736         mb[0] = le16_to_cpu(mbxstat->mb0);
 737         mb[1] = le16_to_cpu(mbxstat->mb1);
 738         mb[2] = le16_to_cpu(mbxstat->mb2);
 739         mb[6] = le16_to_cpu(mbxstat->mb6);
 740         mb[7] = le16_to_cpu(mbxstat->mb7);
 741
 742         /* Good status? */
 743         if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
 744             mb[0] == MBS_COMMAND_COMPLETE) {
 745
 746                 DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
 747                     "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
 748                     mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
 749                     mbxstat->port_name[2], mbxstat->port_name[3],
 750                     mbxstat->port_name[4], mbxstat->port_name[5],
 751                     mbxstat->port_name[6], mbxstat->port_name[7]));
 752
 753                 memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
 754                 memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);
 755
 756                 /* Is the device already in our fcports list? */
 757                 if (remote_fcport->port_type != FCT_RSCN) {
 758                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 759                             "[%x/%02x%02x%02x] online.\n", ha->host_no,
 760                             remote_fcport->loop_id,
 761                             remote_fcport->d_id.b.domain,
 762                             remote_fcport->d_id.b.area,
 763                             remote_fcport->d_id.b.al_pa));
 764
 765                         qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 766
 767                         return (QLA_SUCCESS);
 768                 }
 769
 770                 /* Does the RSCN portname already exist in our fcports list? */
 771                 exist_fcport = NULL;
 772                 list_for_each_entry(fcport, &ha->fcports, list) {
 773                         if (memcmp(remote_fcport->port_name, fcport->port_name,
 774                             WWN_SIZE) == 0) {
 775                                 exist_fcport = fcport;
 776                                 break;
 777                         }
 778                 }
 779                 if (exist_fcport != NULL) {
 780                         DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
 781                             "fcport in fcports list [%p].\n", ha->host_no,
 782                             exist_fcport));
 783
 784                         /* Abort any ADISC that could have been sent. */
 785                         if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
 786                             exist_fcport->iodesc_idx_sent <
 787                             MAX_IO_DESCRIPTORS &&
 788                             ha->io_descriptors[exist_fcport->iodesc_idx_sent].
 789                             cb_idx == ADISC_PORT_IOCB_CB) {
 790
 791                                 abort_iodesc = qla2x00_alloc_iodesc(ha);
 792                                 if (abort_iodesc) {
 793                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 794                                             "-- issuing abort to outstanding "
 795                                             "Adisc [%x/%02x%02x%02x].\n",
 796                                             ha->host_no, remote_fcport->loop_id,
 797                                             exist_fcport->d_id.b.domain,
 798                                             exist_fcport->d_id.b.area,
 799                                             exist_fcport->d_id.b.al_pa));
 800
 801                                         abort_iodesc->cb_idx = ABORT_IOCB_CB;
 802                                         abort_iodesc->d_id.b24 =
 803                                             exist_fcport->d_id.b24;
 804                                         abort_iodesc->remote_fcport =
 805                                             exist_fcport;
 806                                         exist_fcport->iodesc_idx_sent =
 807                                             abort_iodesc->idx;
 808                                         qla2x00_send_abort_iocb(ha,
 809                                             abort_iodesc, ha->io_descriptors[
 810                                              exist_fcport->iodesc_idx_sent].
 811                                               signature, 1);
 812                                 } else {
 813                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 814                                             "-- unable to abort outstanding "
 815                                             "Adisc [%x/%02x%02x%02x].\n",
 816                                             ha->host_no, remote_fcport->loop_id,
 817                                             exist_fcport->d_id.b.domain,
 818                                             exist_fcport->d_id.b.area,
 819                                             exist_fcport->d_id.b.al_pa));
 820                                 }
 821                         }
 822
 823                         /*
 824                          * If the existing fcport is waiting to send an ADISC
 825                          * or LOGIN, then reuse remote fcport (RSCN) to
 826                          * continue waiting.
 827                          */
 828                         reuse = 0;
 829                         remote_loopid = remote_fcport->loop_id;
 830                         remote_did.b24 = remote_fcport->d_id.b24;
 831                         if (exist_fcport->iodesc_idx_sent ==
 832                             IODESC_ADISC_NEEDED ||
 833                             exist_fcport->iodesc_idx_sent ==
 834                             IODESC_LOGIN_NEEDED) {
 835                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 836                                     "existing fcport [%x/%02x%02x%02x] "
 837                                     "waiting for IO descriptor, reuse RSCN "
 838                                     "fcport.\n", ha->host_no,
 839                                     exist_fcport->loop_id,
 840                                     exist_fcport->d_id.b.domain,
 841                                     exist_fcport->d_id.b.area,
 842                                     exist_fcport->d_id.b.al_pa));
 843
 844                                 reuse++;
 845                                 remote_fcport->iodesc_idx_sent =
 846                                     exist_fcport->iodesc_idx_sent;
 847                                 exist_fcport->iodesc_idx_sent =
 848                                     IODESC_INVALID_INDEX;
 849                                 remote_fcport->loop_id = exist_fcport->loop_id;
 850                                 remote_fcport->d_id.b24 =
 851                                     exist_fcport->d_id.b24;
 852                         }
 853
 854                         /* Logout the old loopid. */
 855                         if (!reuse &&
 856                             exist_fcport->loop_id != remote_fcport->loop_id &&
 857                             exist_fcport->loop_id != FC_NO_LOOP_ID) {
 858                                 login_iodesc = qla2x00_alloc_iodesc(ha);
 859                                 if (login_iodesc) {
 860                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 861                                             "-- issuing logout to free old "
 862                                             "loop id [%x/%02x%02x%02x].\n",
 863                                             ha->host_no, exist_fcport->loop_id,
 864                                             exist_fcport->d_id.b.domain,
 865                                             exist_fcport->d_id.b.area,
 866                                             exist_fcport->d_id.b.al_pa));
 867
 868                                         login_iodesc->cb_idx =
 869                                             LOGOUT_PORT_IOCB_CB;
 870                                         login_iodesc->d_id.b24 =
 871                                             exist_fcport->d_id.b24;
 872                                         login_iodesc->remote_fcport =
 873                                             exist_fcport;
 874                                         exist_fcport->iodesc_idx_sent =
 875                                             login_iodesc->idx;
 876                                         qla2x00_send_logout_iocb(ha,
 877                                             login_iodesc, 1);
 878                                 } else {
 879                                         /* Ran out of IO descriptiors. */
 880                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 881                                             "-- unable to logout to free old "
 882                                             "loop id [%x/%02x%02x%02x].\n",
 883                                             ha->host_no, exist_fcport->loop_id,
 884                                             exist_fcport->d_id.b.domain,
 885                                             exist_fcport->d_id.b.area,
 886                                             exist_fcport->d_id.b.al_pa));
 887
 888                                         exist_fcport->iodesc_idx_sent =
 889                                             IODESC_INVALID_INDEX;
 890                                 }
 891
 892                         }
 893
 894                         /* Update existing fcport with remote fcport info. */
 895                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 896                             "existing fcport [%x/%02x%02x%02x] online.\n",
 897                             ha->host_no, remote_loopid, remote_did.b.domain,
 898                             remote_did.b.area, remote_did.b.al_pa));
 899
 900                         memcpy(exist_fcport->node_name,
 901                             remote_fcport->node_name, WWN_SIZE);
 902                         exist_fcport->loop_id = remote_loopid;
 903                         exist_fcport->d_id.b24 = remote_did.b24;
 904                         qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);
 905
 906                         /* Finally, free the remote (RSCN) fcport. */
 907                         if (!reuse) {
 908                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 909                                     "Freeing RSCN fcport %p "
 910                                     "[%x/%02x%02x%02x].\n", ha->host_no,
 911                                     remote_fcport, remote_fcport->loop_id,
 912                                     remote_fcport->d_id.b.domain,
 913                                     remote_fcport->d_id.b.area,
 914                                     remote_fcport->d_id.b.al_pa));
 915
 916                                 list_del(&remote_fcport->list);
 917                                 kfree(remote_fcport);
 918                         }
 919
 920                         return (QLA_SUCCESS);
 921                 }
 922
 923                 /*
 924                  * A new device has been added, move the RSCN fcport to our
 925                  * fcports list.
 926                  */
 927                 DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
 928                     "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
 929                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 930                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 931
 932                 list_del(&remote_fcport->list);
 933                 remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
 934                 qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 935                 list_add_tail(&remote_fcport->list, &ha->fcports);
 936                 set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
 937         } else {
 938                 /* Handle login failure. */
 939                 if (remote_fcport->login_retry != 0) {
 940                         if (mb[0] == MBS_LOOP_ID_USED) {
 941                                 inuse_did.b.domain = LSB(mb[1]);
 942                                 inuse_did.b.area = MSB(mb[2]);
 943                                 inuse_did.b.al_pa = LSB(mb[2]);
 944
 945                                 DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
 946                                     "id [%x] used by port id [%02x%02x%02x].\n",
 947                                     ha->host_no, remote_fcport->loop_id,
 948                                     inuse_did.b.domain, inuse_did.b.area,
 949                                     inuse_did.b.al_pa));
 950
 951                                 if (remote_fcport->d_id.b24 ==
 952                                     INVALID_PORT_ID) {
 953                                         /*
 954                                          * Invalid port id means we are trying
 955                                          * to login to a remote port with just
 956                                          * a loop id without knowing about the
 957                                          * port id.  Copy the port id and try
 958                                          * again.
 959                                          */
 960                                         remote_fcport->d_id.b24 = inuse_did.b24;
 961                                         iodesc->d_id.b24 = inuse_did.b24;
 962                                 } else {
 963                                         remote_fcport->loop_id++;
 964                                         rval = qla2x00_find_new_loop_id(ha,
 965                                             remote_fcport);
 966                                         if (rval == QLA_FUNCTION_FAILED) {
 967                                                 /* No more loop ids. */
 968                                                 return (QLA_SUCCESS);
 969                                         }
 970                                 }
 971                         } else if (mb[0] == MBS_PORT_ID_USED) {
 972                                 /*
 973                                  * Device has another loop ID.  The firmware
 974                                  * group recommends the driver perform an
 975                                  * implicit login with the specified ID.
 976                                  */
 977                                 DEBUG14(printk("scsi(%ld): Login IOCB -- port "
 978                                     "id [%02x%02x%02x] already assigned to "
 979                                     "loop id [%x].\n", ha->host_no,
 980                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 981                                     iodesc->d_id.b.al_pa, mb[1]));
 982
 983                                 remote_fcport->loop_id = mb[1];
 984
 985                         } else {
 986                                 /* Unable to perform login, try again. */
 987                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 988                                     "failed login [%x/%02x%02x%02x], status=%x "
 989                                     "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
 990                                     ha->host_no, remote_fcport->loop_id,
 991                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 992                                     iodesc->d_id.b.al_pa, status, mb[0], mb[1],
 993                                     mb[2], mb[6], mb[7]));
 994                         }
 995
 996                         /* Reissue Login with the same IO descriptor. */
 997                         iodesc->signature =
 998                             qla2x00_iodesc_to_handle(iodesc);
 999                         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
1000                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
1001                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1002                         remote_fcport->login_retry--;
1003
1004                         DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
1005                             "login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
1006                             remote_fcport->loop_id,
1007                             remote_fcport->d_id.b.domain,
1008                             remote_fcport->d_id.b.area,
1009                             remote_fcport->d_id.b.al_pa,
1010                             remote_fcport->login_retry));
1011
1012                         qla2x00_send_login_iocb(ha, iodesc,
1013                             &remote_fcport->d_id, 1);
1014
1015                         return (QLA_FUNCTION_FAILED);
1016                 } else {
1017                         /* No more logins, mark device dead. */
1018                         DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
1019                             "login [%x/%02x%02x%02x] after retries, status=%x "
1020                             "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
1021                             ha->host_no, remote_fcport->loop_id,
1022                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1023                             iodesc->d_id.b.al_pa, status, mb[0], mb[1],
1024                             mb[2], mb[6], mb[7]));
1025
1026                         atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
1027                         if (remote_fcport->port_type == FCT_RSCN) {
1028                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
1029                                     "Freeing dead RSCN fcport %p "
1030                                     "[%x/%02x%02x%02x].\n", ha->host_no,
1031                                     remote_fcport, remote_fcport->loop_id,
1032                                     remote_fcport->d_id.b.domain,
1033                                     remote_fcport->d_id.b.area,
1034                                     remote_fcport->d_id.b.al_pa));
1035
1036                                 list_del(&remote_fcport->list);
1037                                 kfree(remote_fcport);
1038                         }
1039                 }
1040         }
1041
1042         return (QLA_SUCCESS);
1043 }
1044
1045
1046 /**
1047  * IO descriptor processing routines.
1048  **/
1049
1050 /**
1051  * qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
1052  * @ha: HA context
1053  * @flags: allocation flags
1054  *
1055  * Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
1056  */
1057 fc_port_t *
1058 qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, gfp_t flags)
1059 {
1060         fc_port_t *fcport;
1061
1062         fcport = qla2x00_alloc_fcport(ha, flags);
1063         if (fcport == NULL)
1064                 return (fcport);
1065
1066         /* Setup RSCN fcport structure. */
1067         fcport->port_type = FCT_RSCN;
1068
1069         return (fcport);
1070 }
1071
1072 /**
1073  * qla2x00_handle_port_rscn() - Handle port RSCN.
1074  * @ha: HA context
1075  * @rscn_entry: RSCN entry
1076  * @fcport: fcport entry to updated
1077  *
1078  * Returns QLA_SUCCESS if the port RSCN was handled.
1079  */
1080 int
1081 qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
1082     fc_port_t *known_fcport, int ha_locked)
1083 {
1084         int     rval;
1085         port_id_t rscn_pid;
1086         fc_port_t *fcport, *remote_fcport, *rscn_fcport;
1087         struct io_descriptor *iodesc;
1088
1089         remote_fcport = NULL;
1090         rscn_fcport = NULL;
1091
1092         /* Prepare port id based on incoming entries. */
1093         if (known_fcport) {
1094                 rscn_pid.b24 = known_fcport->d_id.b24;
1095                 remote_fcport = known_fcport;
1096
1097                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1098                     "fcport [%02x%02x%02x].\n", ha->host_no,
1099                     remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
1100                     remote_fcport->d_id.b.al_pa));
1101         } else {
1102                 rscn_pid.b.domain = LSB(MSW(rscn_entry));
1103                 rscn_pid.b.area = MSB(LSW(rscn_entry));
1104                 rscn_pid.b.al_pa = LSB(LSW(rscn_entry));
1105
1106                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1107                     "port id [%02x%02x%02x].\n", ha->host_no,
1108                     rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));
1109
1110                 /*
1111                  * Search fcport lists for a known entry at the specified port
1112                  * ID.
1113                  */
1114                 list_for_each_entry(fcport, &ha->fcports, list) {
1115                     if (rscn_pid.b24 == fcport->d_id.b24) {
1116                             remote_fcport = fcport;
1117                             break;
1118                     }
1119                 }
1120                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1121                     if (rscn_pid.b24 == fcport->d_id.b24) {
1122                             rscn_fcport = fcport;
1123                             break;
1124                     }
1125                 }
1126                 if (remote_fcport == NULL)
1127                     remote_fcport = rscn_fcport;
1128         }
1129
1130         /*
1131          * If the port is already in our fcport list and online, send an ADISC
1132          * to see if it's still alive.  Issue login if a new fcport or the known
1133          * fcport is currently offline.
1134          */
1135         if (remote_fcport) {
1136                 /*
1137                  * No need to send request if the remote fcport is currently
1138                  * waiting for an available io descriptor.
1139                  */
1140                 if (known_fcport == NULL &&
1141                     (remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1142                     remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
1143                         /*
1144                          * If previous waiting io descriptor is an ADISC, then
1145                          * the new RSCN may come from a new remote fcport being
1146                          * plugged into the same location.
1147                          */
1148                         if (remote_fcport->port_type == FCT_RSCN) {
1149                             remote_fcport->iodesc_idx_sent =
1150                                 IODESC_LOGIN_NEEDED;
1151                         } else if (remote_fcport->iodesc_idx_sent ==
1152                             IODESC_ADISC_NEEDED) {
1153                                 fc_port_t *new_fcport;
1154
1155                                 remote_fcport->iodesc_idx_sent =
1156                                     IODESC_INVALID_INDEX;
1157
1158                                 /* Create new fcport for later login. */
1159                                 new_fcport = qla2x00_alloc_rscn_fcport(ha,
1160                                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1161                                 if (new_fcport) {
1162                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1163                                             "-- creating RSCN fcport %p for "
1164                                             "future login.\n", ha->host_no,
1165                                             new_fcport));
1166
1167                                         new_fcport->d_id.b24 =
1168                                             remote_fcport->d_id.b24;
1169                                         new_fcport->iodesc_idx_sent =
1170                                             IODESC_LOGIN_NEEDED;
1171
1172                                         list_add_tail(&new_fcport->list,
1173                                             &ha->rscn_fcports);
1174                                         set_bit(IODESC_PROCESS_NEEDED,
1175                                             &ha->dpc_flags);
1176                                 } else {
1177                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1178                                             "-- unable to allocate RSCN fcport "
1179                                             "for future login.\n",
1180                                             ha->host_no));
1181                                 }
1182                         }
1183                         return (QLA_SUCCESS);
1184                 }
1185
1186                 /* Send ADISC if the fcport is online */
1187                 if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
1188                     remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {
1189
1190                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1191
1192                         iodesc = qla2x00_alloc_iodesc(ha);
1193                         if (iodesc == NULL) {
1194                                 /* Mark fcport for later adisc processing */
1195                                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
1196                                     "enough IO descriptors for Adisc, flag "
1197                                     "for later processing.\n", ha->host_no));
1198
1199                                 remote_fcport->iodesc_idx_sent =
1200                                     IODESC_ADISC_NEEDED;
1201                                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1202
1203                                 return (QLA_SUCCESS);
1204                         }
1205
1206                         iodesc->cb_idx = ADISC_PORT_IOCB_CB;
1207                         iodesc->d_id.b24 = rscn_pid.b24;
1208                         iodesc->remote_fcport = remote_fcport;
1209                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1210                         qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);
1211
1212                         return (QLA_SUCCESS);
1213                 } else if (remote_fcport->iodesc_idx_sent <
1214                     MAX_IO_DESCRIPTORS &&
1215                     ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
1216                     ADISC_PORT_IOCB_CB) {
1217                         /*
1218                          * Receiving another RSCN while an ADISC is pending,
1219                          * abort the IOCB.  Use the same descriptor for the
1220                          * abort.
1221                          */
1222                         uint32_t handle_to_abort;
1223
1224                         iodesc = &ha->io_descriptors[
1225                                 remote_fcport->iodesc_idx_sent];
1226                         qla2x00_remove_iodesc_timer(iodesc);
1227                         handle_to_abort = iodesc->signature;
1228                         iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
1229                         iodesc->cb_idx = ABORT_IOCB_CB;
1230                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
1231                         iodesc->remote_fcport = remote_fcport;
1232                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1233
1234                         DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
1235                             "abort to outstanding Adisc [%x/%02x%02x%02x].\n",
1236                             ha->host_no, remote_fcport->loop_id,
1237                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1238                             iodesc->d_id.b.al_pa));
1239
1240                         qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
1241                             ha_locked);
1242                 }
1243         }
1244
1245         /* We need to login to the remote port, find it. */
1246         if (known_fcport) {
1247                 remote_fcport = known_fcport;
1248         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1249             rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
1250             ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
1251             LOGIN_PORT_IOCB_CB) {
1252                 /*
1253                  * Ignore duplicate RSCN on fcport which has already
1254                  * initiated a login IOCB.
1255                  */
1256                 DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
1257                     "already sent to [%02x%02x%02x].\n", ha->host_no,
1258                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1259                     rscn_fcport->d_id.b.al_pa));
1260
1261                 return (QLA_SUCCESS);
1262         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1263             rscn_fcport != remote_fcport) {
1264                 /* Reuse same rscn fcport. */
1265                 DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
1266                     "[%02x%02x%02x].\n", ha->host_no,
1267                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1268                     rscn_fcport->d_id.b.al_pa));
1269
1270                 remote_fcport = rscn_fcport;
1271         } else {
1272                 /* Create new fcport for later login. */
1273                 remote_fcport = qla2x00_alloc_rscn_fcport(ha,
1274                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1275                 list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
1276         }
1277         if (remote_fcport == NULL)
1278                 return (QLA_SUCCESS);
1279
1280         /* Prepare fcport for login. */
1281         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1282         remote_fcport->login_retry = 3; /* ha->login_retry_count; */
1283         remote_fcport->d_id.b24 = rscn_pid.b24;
1284
1285         iodesc = qla2x00_alloc_iodesc(ha);
1286         if (iodesc == NULL) {
1287                 /* Mark fcport for later adisc processing. */
1288                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
1289                     "descriptors for Login, flag for later processing.\n",
1290                     ha->host_no));
1291
1292                 remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
1293                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1294
1295                 return (QLA_SUCCESS);
1296         }
1297
1298         if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
1299                 remote_fcport->loop_id = ha->min_external_loopid;
1300
1301                 rval = qla2x00_find_new_loop_id(ha, remote_fcport);
1302                 if (rval == QLA_FUNCTION_FAILED) {
1303                         /* No more loop ids, failed. */
1304                         DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
1305                             "loop id to perform Login, failed.\n",
1306                             ha->host_no));
1307
1308                         return (rval);
1309                 }
1310         }
1311
1312         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
1313         iodesc->d_id.b24 = rscn_pid.b24;
1314         iodesc->remote_fcport = remote_fcport;
1315         remote_fcport->iodesc_idx_sent = iodesc->idx;
1316
1317         DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
1318             "[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
1319             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));
1320
1321         qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);
1322
1323         return (QLA_SUCCESS);
1324 }
1325
1326 /**
1327  * qla2x00_process_iodesc() - Complete IO descriptor processing.
1328  * @ha: HA context
1329  * @mbxstat: Mailbox IOCB status
1330  */
1331 void
1332 qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
1333 {
1334         int rval;
1335         uint32_t signature;
1336         fc_port_t *fcport;
1337         struct io_descriptor *iodesc;
1338
1339         signature = mbxstat->handle;
1340
1341         DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
1342             ha->host_no, signature));
1343
1344         /* Retrieve proper IO descriptor. */
1345         iodesc = qla2x00_handle_to_iodesc(ha, signature);
1346         if (iodesc == NULL) {
1347                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1348                     "incorrect signature %08x.\n", ha->host_no, signature));
1349
1350                 return;
1351         }
1352
1353         /* Stop IO descriptor timer. */
1354         qla2x00_remove_iodesc_timer(iodesc);
1355
1356         /* Verify signature match. */
1357         if (iodesc->signature != signature) {
1358                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1359                     "signature mismatch, sent %08x, received %08x.\n",
1360                     ha->host_no, iodesc->signature, signature));
1361
1362                 return;
1363         }
1364
1365         /* Go with IOCB callback. */
1366         rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
1367         if (rval != QLA_SUCCESS) {
1368                 /* IO descriptor reused by callback. */
1369                 return;
1370         }
1371
1372         qla2x00_free_iodesc(iodesc);
1373
1374         if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
1375                 /* Scan our fcports list for any RSCN requests. */
1376                 list_for_each_entry(fcport, &ha->fcports, list) {
1377                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1378                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1379                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1380                                 return;
1381                         }
1382                 }
1383
1384                 /* Scan our RSCN fcports list for any RSCN requests. */
1385                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1386                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1387                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1388                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1389                                 return;
1390                         }
1391                 }
1392         }
1393         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1394 }
1395
1396 /**
1397  * qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
1398  * @ha: HA context
1399  *
1400  * This routine will also delete any RSCN entries related to the outstanding
1401  * IO descriptors.
1402  */
1403 void
1404 qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
1405 {
1406         fc_port_t *fcport, *fcptemp;
1407
1408         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1409
1410         /* Abort all IO descriptors. */
1411         qla2x00_init_io_descriptors(ha);
1412
1413         /* Reset all pending IO descriptors in fcports list. */
1414         list_for_each_entry(fcport, &ha->fcports, list) {
1415                 fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
1416         }
1417
1418         /* Reset all pending IO descriptors in rscn fcports list. */
1419         list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
1420                 DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
1421                     "%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
1422                     fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
1423                     fcport->d_id.b.al_pa));
1424
1425                 list_del(&fcport->list);
1426                 kfree(fcport);
1427         }
1428 }