drivers/scsi/qla2xxx/qla_rscn.c

   1 /*
   2  *                  QLOGIC LINUX SOFTWARE
   3  *
   4  * QLogic ISP2x00 device driver for Linux 2.6.x
   5  * Copyright (C) 2003-2004 QLogic Corporation
   6  * (www.qlogic.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  */
  19 #include "qla_def.h"
  20
  21 /**
  22  * IO descriptor handle definitions.
  23  *
  24  * Signature form:
  25  *
  26  *      |31------28|27-------------------12|11-------0|
  27  *      |   Type   |   Rolling Signature   |   Index  |
  28  *      |----------|-----------------------|----------|
  29  *
  30  **/
  31
  32 #define HDL_TYPE_SCSI           0
  33 #define HDL_TYPE_ASYNC_IOCB     0x0A
  34
  35 #define HDL_INDEX_BITS  12
  36 #define HDL_ITER_BITS   16
  37 #define HDL_TYPE_BITS   4
  38
  39 #define HDL_INDEX_MASK  ((1UL << HDL_INDEX_BITS) - 1)
  40 #define HDL_ITER_MASK   ((1UL << HDL_ITER_BITS) - 1)
  41 #define HDL_TYPE_MASK   ((1UL << HDL_TYPE_BITS) - 1)
  42
  43 #define HDL_INDEX_SHIFT 0
  44 #define HDL_ITER_SHIFT  (HDL_INDEX_SHIFT + HDL_INDEX_BITS)
  45 #define HDL_TYPE_SHIFT  (HDL_ITER_SHIFT + HDL_ITER_BITS)
  46
  47 /* Local Prototypes. */
  48 static inline uint32_t qla2x00_to_handle(uint16_t, uint16_t, uint16_t);
  49 static inline uint16_t qla2x00_handle_to_idx(uint32_t);
  50 static inline uint16_t qla2x00_handle_to_iter(uint32_t);
  51 static inline uint16_t qla2x00_handle_to_type(uint32_t);
  52 static inline uint32_t qla2x00_iodesc_to_handle(struct io_descriptor *);
  53 static inline struct io_descriptor *qla2x00_handle_to_iodesc(scsi_qla_host_t *,
  54     uint32_t);
  55
  56 static inline struct io_descriptor *qla2x00_alloc_iodesc(scsi_qla_host_t *);
  57 static inline void qla2x00_free_iodesc(struct io_descriptor *);
  58 static inline void qla2x00_init_io_descriptors(scsi_qla_host_t *);
  59
  60 static void qla2x00_iodesc_timeout(unsigned long);
  61 static inline void qla2x00_add_iodesc_timer(struct io_descriptor *);
  62 static inline void qla2x00_remove_iodesc_timer(struct io_descriptor *);
  63
  64 static inline void qla2x00_update_login_fcport(scsi_qla_host_t *,
  65     struct mbx_entry *, fc_port_t *);
  66
  67 static int qla2x00_send_abort_iocb(scsi_qla_host_t *, struct io_descriptor *,
  68     uint32_t, int);
  69 static int qla2x00_send_abort_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  70     struct mbx_entry *);
  71
  72 static int qla2x00_send_adisc_iocb(scsi_qla_host_t *, struct io_descriptor *,
  73     int);
  74 static int qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  75     struct mbx_entry *);
  76
  77 static int qla2x00_send_logout_iocb(scsi_qla_host_t *, struct io_descriptor *,
  78     int);
  79 static int qla2x00_send_logout_iocb_cb(scsi_qla_host_t *,
  80     struct io_descriptor *, struct mbx_entry *);
  81
  82 static int qla2x00_send_login_iocb(scsi_qla_host_t *, struct io_descriptor *,
  83     port_id_t *, int);
  84 static int qla2x00_send_login_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
  85     struct mbx_entry *);
  86
  87 /**
  88  * Mailbox IOCB callback array.
  89  **/
  90 int (*iocb_function_cb_list[LAST_IOCB_CB])
  91         (scsi_qla_host_t *, struct io_descriptor *, struct mbx_entry *) = {
  92
  93         qla2x00_send_abort_iocb_cb,
  94         qla2x00_send_adisc_iocb_cb,
  95         qla2x00_send_logout_iocb_cb,
  96         qla2x00_send_login_iocb_cb,
  97 };
  98
  99
 100 /**
 101  * Generic IO descriptor handle routines.
 102  **/
 103
 104 /**
 105  * qla2x00_to_handle() - Create a descriptor handle.
 106  * @type: descriptor type
 107  * @iter: descriptor rolling signature
 108  * @idx: index to the descriptor array
 109  *
 110  * Returns a composite handle based in the @type, @iter, and @idx.
 111  */
 112 static inline uint32_t
 113 qla2x00_to_handle(uint16_t type, uint16_t iter, uint16_t idx)
 114 {
 115         return ((uint32_t)(((uint32_t)type << HDL_TYPE_SHIFT) |
 116             ((uint32_t)iter << HDL_ITER_SHIFT) |
 117             ((uint32_t)idx << HDL_INDEX_SHIFT)));
 118 }
 119
 120 /**
 121  * qla2x00_handle_to_idx() - Retrive the index for a given handle.
 122  * @handle: descriptor handle
 123  *
 124  * Returns the index specified by the @handle.
 125  */
 126 static inline uint16_t
 127 qla2x00_handle_to_idx(uint32_t handle)
 128 {
 129         return ((uint16_t)(((handle) >> HDL_INDEX_SHIFT) & HDL_INDEX_MASK));
 130 }
 131
 132 /**
 133  * qla2x00_handle_to_type() - Retrive the descriptor type for a given handle.
 134  * @handle: descriptor handle
 135  *
 136  * Returns the descriptor type specified by the @handle.
 137  */
 138 static inline uint16_t
 139 qla2x00_handle_to_type(uint32_t handle)
 140 {
 141         return ((uint16_t)(((handle) >> HDL_TYPE_SHIFT) & HDL_TYPE_MASK));
 142 }
 143
 144 /**
 145  * qla2x00_handle_to_iter() - Retrive the rolling signature for a given handle.
 146  * @handle: descriptor handle
 147  *
 148  * Returns the signature specified by the @handle.
 149  */
 150 static inline uint16_t
 151 qla2x00_handle_to_iter(uint32_t handle)
 152 {
 153         return ((uint16_t)(((handle) >> HDL_ITER_SHIFT) & HDL_ITER_MASK));
 154 }
 155
 156 /**
 157  * qla2x00_iodesc_to_handle() - Convert an IO descriptor to a unique handle.
 158  * @iodesc: io descriptor
 159  *
 160  * Returns a unique handle for @iodesc.
 161  */
 162 static inline uint32_t
 163 qla2x00_iodesc_to_handle(struct io_descriptor *iodesc)
 164 {
 165         uint32_t handle;
 166
 167         handle = qla2x00_to_handle(HDL_TYPE_ASYNC_IOCB,
 168             ++iodesc->ha->iodesc_signature, iodesc->idx);
 169         iodesc->signature = handle;
 170
 171         return (handle);
 172 }
 173
 174 /**
 175  * qla2x00_handle_to_iodesc() - Retrieve an IO descriptor given a unique handle.
 176  * @ha: HA context
 177  * @handle: handle to io descriptor
 178  *
 179  * Returns a pointer to the io descriptor, or NULL, if the io descriptor does
 180  * not exist or the io descriptors signature does not @handle.
 181  */
 182 static inline struct io_descriptor *
 183 qla2x00_handle_to_iodesc(scsi_qla_host_t *ha, uint32_t handle)
 184 {
 185         uint16_t idx;
 186         struct io_descriptor *iodesc;
 187
 188         idx = qla2x00_handle_to_idx(handle);
 189         iodesc = &ha->io_descriptors[idx];
 190         if (iodesc)
 191                 if (iodesc->signature != handle)
 192                         iodesc = NULL;
 193
 194         return (iodesc);
 195 }
 196
 197
 198 /**
 199  * IO descriptor allocation routines.
 200  **/
 201
 202 /**
 203  * qla2x00_alloc_iodesc() - Allocate an IO descriptor from the pool.
 204  * @ha: HA context
 205  *
 206  * Returns a pointer to the allocated io descriptor, or NULL, if none available.
 207  */
 208 static inline struct io_descriptor *
 209 qla2x00_alloc_iodesc(scsi_qla_host_t *ha)
 210 {
 211         uint16_t iter;
 212         struct io_descriptor *iodesc;
 213
 214         iodesc = NULL;
 215         for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
 216                 if (ha->io_descriptors[iter].used)
 217                         continue;
 218
 219                 iodesc = &ha->io_descriptors[iter];
 220                 iodesc->used = 1;
 221                 iodesc->idx = iter;
 222                 init_timer(&iodesc->timer);
 223                 iodesc->ha = ha;
 224                 iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
 225                 break;
 226         }
 227
 228         return (iodesc);
 229 }
 230
 231 /**
 232  * qla2x00_free_iodesc() - Free an IO descriptor.
 233  * @iodesc: io descriptor
 234  *
 235  * NOTE: The io descriptors timer *must* be stopped before it can be free'd.
 236  */
 237 static inline void
 238 qla2x00_free_iodesc(struct io_descriptor *iodesc)
 239 {
 240         iodesc->used = 0;
 241         iodesc->signature = 0;
 242 }
 243
 244 /**
 245  * qla2x00_remove_iodesc_timer() - Remove an active timer from an IO descriptor.
 246  * @iodesc: io descriptor
 247  */
 248 static inline void
 249 qla2x00_remove_iodesc_timer(struct io_descriptor *iodesc)
 250 {
 251         if (iodesc->timer.function != NULL) {
 252                 del_timer_sync(&iodesc->timer);
 253                 iodesc->timer.data = (unsigned long) NULL;
 254                 iodesc->timer.function = NULL;
 255         }
 256 }
 257
 258 /**
 259  * qla2x00_init_io_descriptors() - Initialize the pool of IO descriptors.
 260  * @ha: HA context
 261  */
 262 static inline void
 263 qla2x00_init_io_descriptors(scsi_qla_host_t *ha)
 264 {
 265         uint16_t iter;
 266
 267         for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
 268                 if (!ha->io_descriptors[iter].used)
 269                         continue;
 270
 271                 qla2x00_remove_iodesc_timer(&ha->io_descriptors[iter]);
 272                 qla2x00_free_iodesc(&ha->io_descriptors[iter]);
 273         }
 274 }
 275
 276
 277 /**
 278  * IO descriptor timer routines.
 279  **/
 280
 281 /**
 282  * qla2x00_iodesc_timeout() - Timeout IO descriptor handler.
 283  * @data: io descriptor
 284  */
 285 static void
 286 qla2x00_iodesc_timeout(unsigned long data)
 287 {
 288         struct io_descriptor *iodesc;
 289
 290         iodesc = (struct io_descriptor *) data;
 291
 292         DEBUG14(printk("scsi(%ld): IO descriptor timeout, index=%x "
 293             "signature=%08x, scheduling ISP abort.\n", iodesc->ha->host_no,
 294             iodesc->idx, iodesc->signature));
 295
 296         qla2x00_free_iodesc(iodesc);
 297
 298         qla_printk(KERN_WARNING, iodesc->ha,
 299             "IO descriptor timeout. Scheduling ISP abort.\n");
 300         set_bit(ISP_ABORT_NEEDED, &iodesc->ha->dpc_flags);
 301 }
 302
 303 /**
 304  * qla2x00_add_iodesc_timer() - Add and start a timer for an IO descriptor.
 305  * @iodesc: io descriptor
 306  *
 307  * NOTE:
 308  * The firmware shall timeout an outstanding mailbox IOCB in 2 * R_A_TOV (in
 309  * tenths of a second) after it hits the wire.  But, if there are any request
 310  * resource contraints (i.e. during heavy I/O), exchanges can be held off for
 311  * at most R_A_TOV.  Therefore, the driver will wait 4 * R_A_TOV before
 312  * scheduling a recovery (big hammer).
 313  */
 314 static inline void
 315 qla2x00_add_iodesc_timer(struct io_descriptor *iodesc)
 316 {
 317         unsigned long timeout;
 318
 319         timeout = (iodesc->ha->r_a_tov * 4) / 10;
 320         init_timer(&iodesc->timer);
 321         iodesc->timer.data = (unsigned long) iodesc;
 322         iodesc->timer.expires = jiffies + (timeout * HZ);
 323         iodesc->timer.function =
 324             (void (*) (unsigned long)) qla2x00_iodesc_timeout;
 325         add_timer(&iodesc->timer);
 326 }
 327
 328 /**
 329  * IO descriptor support routines.
 330  **/
 331
 332 /**
 333  * qla2x00_update_login_fcport() - Update fcport data after login processing.
 334  * @ha: HA context
 335  * @mbxstat: Mailbox command status IOCB
 336  * @fcport: port to update
 337  */
 338 static inline void
 339 qla2x00_update_login_fcport(scsi_qla_host_t *ha, struct mbx_entry *mbxstat,
 340     fc_port_t *fcport)
 341 {
 342         if (le16_to_cpu(mbxstat->mb1) & BIT_0) {
 343                 fcport->port_type = FCT_INITIATOR;
 344         } else {
 345                 fcport->port_type = FCT_TARGET;
 346                 if (le16_to_cpu(mbxstat->mb1) & BIT_1) {
 347                         fcport->flags |= FCF_TAPE_PRESENT;
 348                 }
 349         }
 350         fcport->login_retry = 0;
 351         fcport->port_login_retry_count = ha->port_down_retry_count *
 352             PORT_RETRY_TIME;
 353         atomic_set(&fcport->port_down_timer, ha->port_down_retry_count *
 354             PORT_RETRY_TIME);
 355         fcport->flags |= FCF_FABRIC_DEVICE;
 356         fcport->flags &= ~FCF_FAILOVER_NEEDED;
 357         fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 358         atomic_set(&fcport->state, FCS_ONLINE);
 359 }
 360
 361
 362 /**
 363  * Mailbox IOCB commands.
 364  **/
 365
 366 /**
 367  * qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
 368  * @ha: HA context
 369  * @handle: handle to io descriptor
 370  *
 371  * Returns a pointer to the reqest entry, or NULL, if none were available.
 372  */
 373 static inline struct mbx_entry *
 374 qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
 375 {
 376         uint16_t cnt;
 377         device_reg_t __iomem *reg = ha->iobase;
 378         struct mbx_entry *mbxentry;
 379
 380         mbxentry = NULL;
 381
 382         if (ha->req_q_cnt < 3) {
 383                 cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
 384                 if  (ha->req_ring_index < cnt)
 385                         ha->req_q_cnt = cnt - ha->req_ring_index;
 386                 else
 387                         ha->req_q_cnt = ha->request_q_length -
 388                             (ha->req_ring_index - cnt);
 389         }
 390         if (ha->req_q_cnt >= 3) {
 391                 mbxentry = (struct mbx_entry *)ha->request_ring_ptr;
 392
 393                 memset(mbxentry, 0, sizeof(struct mbx_entry));
 394                 mbxentry->entry_type = MBX_IOCB_TYPE;
 395                 mbxentry->entry_count = 1;
 396                 mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
 397                 mbxentry->handle = handle;
 398         }
 399         return (mbxentry);
 400 }
 401
 402 /**
 403  * qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
 404  * @ha: HA context
 405  * @iodesc: io descriptor
 406  * @handle_to_abort: firmware handle to abort
 407  * @ha_locked: is function called with the hardware lock
 408  *
 409  * Returns QLA_SUCCESS if the IOCB was issued.
 410  */
 411 static int
 412 qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 413     uint32_t handle_to_abort, int ha_locked)
 414 {
 415         unsigned long flags = 0;
 416         struct mbx_entry *mbxentry;
 417
 418         /* Send marker if required. */
 419         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 420                 return (QLA_FUNCTION_FAILED);
 421
 422         if (!ha_locked)
 423                 spin_lock_irqsave(&ha->hardware_lock, flags);
 424
 425         /* Build abort mailbox IOCB. */
 426         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 427         if (mbxentry == NULL) {
 428                 if (!ha_locked)
 429                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 430
 431                 return (QLA_FUNCTION_FAILED);
 432         }
 433         mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
 434         mbxentry->mb1 = mbxentry->loop_id.extended =
 435             cpu_to_le16(iodesc->remote_fcport->loop_id);
 436         mbxentry->mb2 = LSW(handle_to_abort);
 437         mbxentry->mb3 = MSW(handle_to_abort);
 438         wmb();
 439
 440         qla2x00_add_iodesc_timer(iodesc);
 441
 442         /* Issue command to ISP. */
 443         qla2x00_isp_cmd(ha);
 444
 445         if (!ha_locked)
 446                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 447
 448         DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
 449             "%08x.\n", ha->host_no, iodesc->signature,
 450             iodesc->remote_fcport->loop_id, handle_to_abort));
 451
 452         return (QLA_SUCCESS);
 453 }
 454
 455 /**
 456  * qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
 457  * @ha: HA context
 458  * @iodesc: io descriptor
 459  * @mbxstat: mailbox status IOCB
 460  *
 461  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 462  * will be used for a retry.
 463  */
 464 static int
 465 qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 466     struct mbx_entry *mbxstat)
 467 {
 468         DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
 469             "status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
 470             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
 471             le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 472
 473         return (QLA_SUCCESS);
 474 }
 475
 476
 477 /**
 478  * qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
 479  * @ha: HA context
 480  * @iodesc: io descriptor
 481  * @ha_locked: is function called with the hardware lock
 482  *
 483  * Returns QLA_SUCCESS if the IOCB was issued.
 484  */
 485 static int
 486 qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 487     int ha_locked)
 488 {
 489         unsigned long flags = 0;
 490         struct mbx_entry *mbxentry;
 491
 492         /* Send marker if required. */
 493         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 494                 return (QLA_FUNCTION_FAILED);
 495
 496         if (!ha_locked)
 497                 spin_lock_irqsave(&ha->hardware_lock, flags);
 498
 499         /* Build Get Port Database IOCB. */
 500         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 501         if (mbxentry == NULL) {
 502                 if (!ha_locked)
 503                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 504
 505                 return (QLA_FUNCTION_FAILED);
 506         }
 507         mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
 508         mbxentry->mb1 = mbxentry->loop_id.extended =
 509             cpu_to_le16(iodesc->remote_fcport->loop_id);
 510         mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
 511         mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
 512         mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
 513         mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
 514         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 515         wmb();
 516
 517         qla2x00_add_iodesc_timer(iodesc);
 518
 519         /* Issue command to ISP. */
 520         qla2x00_isp_cmd(ha);
 521
 522         if (!ha_locked)
 523                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 524
 525         DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
 526             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 527
 528         return (QLA_SUCCESS);
 529 }
 530
 531 /**
 532  * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
 533  * @ha: HA context
 534  * @iodesc: io descriptor
 535  * @mbxstat: mailbox status IOCB
 536  *
 537  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 538  * will be used for a retry.
 539  */
 540 static int
 541 qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 542     struct mbx_entry *mbxstat)
 543 {
 544         fc_port_t *remote_fcport;
 545
 546         remote_fcport = iodesc->remote_fcport;
 547
 548         /* Ensure the port IDs are consistent. */
 549         if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
 550                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
 551                     "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
 552                     ha->host_no, remote_fcport->d_id.b.domain,
 553                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 554                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 555                     iodesc->d_id.b.al_pa));
 556
 557                 return (QLA_SUCCESS);
 558         }
 559
 560         /* Only process the last command. */
 561         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 562                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
 563                     "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
 564                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
 565                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 566                     iodesc->idx));
 567
 568                 return (QLA_SUCCESS);
 569         }
 570
 571         if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
 572                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 573                     "[%x/%02x%02x%02x] online.\n", ha->host_no,
 574                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 575                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 576
 577                 atomic_set(&remote_fcport->state, FCS_ONLINE);
 578         } else {
 579                 DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
 580                     "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
 581                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 582                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
 583                     le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
 584
 585                 if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
 586                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
 587         }
 588         remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
 589
 590         return (QLA_SUCCESS);
 591 }
 592
 593
 594 /**
 595  * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
 596  * @ha: HA context
 597  * @iodesc: io descriptor
 598  * @ha_locked: is function called with the hardware lock
 599  *
 600  * Returns QLA_SUCCESS if the IOCB was issued.
 601  */
 602 static int
 603 qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 604     int ha_locked)
 605 {
 606         unsigned long flags = 0;
 607         struct mbx_entry *mbxentry;
 608
 609         /* Send marker if required. */
 610         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 611                 return (QLA_FUNCTION_FAILED);
 612
 613         if (!ha_locked)
 614                 spin_lock_irqsave(&ha->hardware_lock, flags);
 615
 616         /* Build fabric port logout mailbox IOCB. */
 617         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 618         if (mbxentry == NULL) {
 619                 if (!ha_locked)
 620                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 621
 622                 return (QLA_FUNCTION_FAILED);
 623         }
 624         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
 625         mbxentry->mb1 = mbxentry->loop_id.extended =
 626             cpu_to_le16(iodesc->remote_fcport->loop_id);
 627         wmb();
 628
 629         qla2x00_add_iodesc_timer(iodesc);
 630
 631         /* Issue command to ISP. */
 632         qla2x00_isp_cmd(ha);
 633
 634         if (!ha_locked)
 635                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 636
 637         DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
 638             ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
 639
 640         return (QLA_SUCCESS);
 641 }
 642
 643 /**
 644  * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
 645  * @ha: HA context
 646  * @iodesc: io descriptor
 647  * @mbxstat: mailbox status IOCB
 648  *
 649  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 650  * will be used for a retry.
 651  */
 652 static int
 653 qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 654     struct mbx_entry *mbxstat)
 655 {
 656         DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
 657             "status=%x mb0=%x mb1=%x.\n", ha->host_no,
 658             iodesc->remote_fcport->loop_id,
 659             iodesc->remote_fcport->d_id.b.domain,
 660             iodesc->remote_fcport->d_id.b.area,
 661             iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
 662             le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));
 663
 664         return (QLA_SUCCESS);
 665 }
 666
 667
 668 /**
 669  * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
 670  * @ha: HA context
 671  * @iodesc: io descriptor
 672  * @d_id: port id for device
 673  * @ha_locked: is function called with the hardware lock
 674  *
 675  * Returns QLA_SUCCESS if the IOCB was issued.
 676  */
 677 static int
 678 qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 679     port_id_t *d_id, int ha_locked)
 680 {
 681         unsigned long flags = 0;
 682         struct mbx_entry *mbxentry;
 683
 684         /* Send marker if required. */
 685         if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
 686                 return (QLA_FUNCTION_FAILED);
 687
 688         if (!ha_locked)
 689                 spin_lock_irqsave(&ha->hardware_lock, flags);
 690
 691         /* Build fabric port login mailbox IOCB. */
 692         mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
 693         if (mbxentry == NULL) {
 694                 if (!ha_locked)
 695                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 696
 697                 return (QLA_FUNCTION_FAILED);
 698         }
 699         mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
 700         mbxentry->mb1 = mbxentry->loop_id.extended =
 701             cpu_to_le16(iodesc->remote_fcport->loop_id);
 702         mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
 703         mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
 704         mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
 705         wmb();
 706
 707         qla2x00_add_iodesc_timer(iodesc);
 708
 709         /* Issue command to ISP. */
 710         qla2x00_isp_cmd(ha);
 711
 712         if (!ha_locked)
 713                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 714
 715         DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
 716             "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
 717             iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
 718             d_id->b.al_pa));
 719
 720         return (QLA_SUCCESS);
 721 }
 722
 723 /**
 724  * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
 725  * @ha: HA context
 726  * @iodesc: io descriptor
 727  * @mbxstat: mailbox status IOCB
 728  *
 729  * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
 730  * will be used for a retry.
 731  */
 732 static int
 733 qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
 734     struct mbx_entry *mbxstat)
 735 {
 736         int rval;
 737         fc_port_t *fcport, *remote_fcport, *exist_fcport;
 738         struct io_descriptor *abort_iodesc, *login_iodesc;
 739         uint16_t status, mb[8];
 740         uint16_t reuse;
 741         uint16_t remote_loopid;
 742         port_id_t remote_did, inuse_did;
 743
 744         remote_fcport = iodesc->remote_fcport;
 745
 746         /* Only process the last command. */
 747         if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
 748                 DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
 749                     "[%02x%02x%02x], expected %x, received %x.\n",
 750                     ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
 751                     iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
 752                     iodesc->idx));
 753
 754                 /* Free RSCN fcport resources. */
 755                 if (remote_fcport->port_type == FCT_RSCN) {
 756                         DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
 757                             "fcport %p [%x/%02x%02x%02x] given ignored Login "
 758                             "IOCB.\n", ha->host_no, remote_fcport,
 759                             remote_fcport->loop_id,
 760                             remote_fcport->d_id.b.domain,
 761                             remote_fcport->d_id.b.area,
 762                             remote_fcport->d_id.b.al_pa));
 763
 764                         list_del(&remote_fcport->list);
 765                         kfree(remote_fcport);
 766                 }
 767                 return (QLA_SUCCESS);
 768         }
 769
 770         status = le16_to_cpu(mbxstat->status);
 771         mb[0] = le16_to_cpu(mbxstat->mb0);
 772         mb[1] = le16_to_cpu(mbxstat->mb1);
 773         mb[2] = le16_to_cpu(mbxstat->mb2);
 774         mb[6] = le16_to_cpu(mbxstat->mb6);
 775         mb[7] = le16_to_cpu(mbxstat->mb7);
 776
 777         /* Good status? */
 778         if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
 779             mb[0] == MBS_COMMAND_COMPLETE) {
 780
 781                 DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
 782                     "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
 783                     mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
 784                     mbxstat->port_name[2], mbxstat->port_name[3],
 785                     mbxstat->port_name[4], mbxstat->port_name[5],
 786                     mbxstat->port_name[6], mbxstat->port_name[7]));
 787
 788                 memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
 789                 memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);
 790
 791                 /* Is the device already in our fcports list? */
 792                 if (remote_fcport->port_type != FCT_RSCN) {
 793                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 794                             "[%x/%02x%02x%02x] online.\n", ha->host_no,
 795                             remote_fcport->loop_id,
 796                             remote_fcport->d_id.b.domain,
 797                             remote_fcport->d_id.b.area,
 798                             remote_fcport->d_id.b.al_pa));
 799
 800                         qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 801
 802                         return (QLA_SUCCESS);
 803                 }
 804
 805                 /* Does the RSCN portname already exist in our fcports list? */
 806                 exist_fcport = NULL;
 807                 list_for_each_entry(fcport, &ha->fcports, list) {
 808                         if (memcmp(remote_fcport->port_name, fcport->port_name,
 809                             WWN_SIZE) == 0) {
 810                                 exist_fcport = fcport;
 811                                 break;
 812                         }
 813                 }
 814                 if (exist_fcport != NULL) {
 815                         DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
 816                             "fcport in fcports list [%p].\n", ha->host_no,
 817                             exist_fcport));
 818
 819                         /* Abort any ADISC that could have been sent. */
 820                         if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
 821                             exist_fcport->iodesc_idx_sent <
 822                             MAX_IO_DESCRIPTORS &&
 823                             ha->io_descriptors[exist_fcport->iodesc_idx_sent].
 824                             cb_idx == ADISC_PORT_IOCB_CB) {
 825
 826                                 abort_iodesc = qla2x00_alloc_iodesc(ha);
 827                                 if (abort_iodesc) {
 828                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 829                                             "-- issuing abort to outstanding "
 830                                             "Adisc [%x/%02x%02x%02x].\n",
 831                                             ha->host_no, remote_fcport->loop_id,
 832                                             exist_fcport->d_id.b.domain,
 833                                             exist_fcport->d_id.b.area,
 834                                             exist_fcport->d_id.b.al_pa));
 835
 836                                         abort_iodesc->cb_idx = ABORT_IOCB_CB;
 837                                         abort_iodesc->d_id.b24 =
 838                                             exist_fcport->d_id.b24;
 839                                         abort_iodesc->remote_fcport =
 840                                             exist_fcport;
 841                                         exist_fcport->iodesc_idx_sent =
 842                                             abort_iodesc->idx;
 843                                         qla2x00_send_abort_iocb(ha,
 844                                             abort_iodesc, ha->io_descriptors[
 845                                              exist_fcport->iodesc_idx_sent].
 846                                               signature, 1);
 847                                 } else {
 848                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 849                                             "-- unable to abort outstanding "
 850                                             "Adisc [%x/%02x%02x%02x].\n",
 851                                             ha->host_no, remote_fcport->loop_id,
 852                                             exist_fcport->d_id.b.domain,
 853                                             exist_fcport->d_id.b.area,
 854                                             exist_fcport->d_id.b.al_pa));
 855                                 }
 856                         }
 857
 858                         /*
 859                          * If the existing fcport is waiting to send an ADISC
 860                          * or LOGIN, then reuse remote fcport (RSCN) to
 861                          * continue waiting.
 862                          */
 863                         reuse = 0;
 864                         remote_loopid = remote_fcport->loop_id;
 865                         remote_did.b24 = remote_fcport->d_id.b24;
 866                         if (exist_fcport->iodesc_idx_sent ==
 867                             IODESC_ADISC_NEEDED ||
 868                             exist_fcport->iodesc_idx_sent ==
 869                             IODESC_LOGIN_NEEDED) {
 870                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 871                                     "existing fcport [%x/%02x%02x%02x] "
 872                                     "waiting for IO descriptor, reuse RSCN "
 873                                     "fcport.\n", ha->host_no,
 874                                     exist_fcport->loop_id,
 875                                     exist_fcport->d_id.b.domain,
 876                                     exist_fcport->d_id.b.area,
 877                                     exist_fcport->d_id.b.al_pa));
 878
 879                                 reuse++;
 880                                 remote_fcport->iodesc_idx_sent =
 881                                     exist_fcport->iodesc_idx_sent;
 882                                 exist_fcport->iodesc_idx_sent =
 883                                     IODESC_INVALID_INDEX;
 884                                 remote_fcport->loop_id = exist_fcport->loop_id;
 885                                 remote_fcport->d_id.b24 =
 886                                     exist_fcport->d_id.b24;
 887                         }
 888
 889                         /* Logout the old loopid. */
 890                         if (!reuse &&
 891                             exist_fcport->loop_id != remote_fcport->loop_id &&
 892                             exist_fcport->loop_id != FC_NO_LOOP_ID) {
 893                                 login_iodesc = qla2x00_alloc_iodesc(ha);
 894                                 if (login_iodesc) {
 895                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 896                                             "-- issuing logout to free old "
 897                                             "loop id [%x/%02x%02x%02x].\n",
 898                                             ha->host_no, exist_fcport->loop_id,
 899                                             exist_fcport->d_id.b.domain,
 900                                             exist_fcport->d_id.b.area,
 901                                             exist_fcport->d_id.b.al_pa));
 902
 903                                         login_iodesc->cb_idx =
 904                                             LOGOUT_PORT_IOCB_CB;
 905                                         login_iodesc->d_id.b24 =
 906                                             exist_fcport->d_id.b24;
 907                                         login_iodesc->remote_fcport =
 908                                             exist_fcport;
 909                                         exist_fcport->iodesc_idx_sent =
 910                                             login_iodesc->idx;
 911                                         qla2x00_send_logout_iocb(ha,
 912                                             login_iodesc, 1);
 913                                 } else {
 914                                         /* Ran out of IO descriptiors. */
 915                                         DEBUG14(printk("scsi(%ld): Login IOCB "
 916                                             "-- unable to logout to free old "
 917                                             "loop id [%x/%02x%02x%02x].\n",
 918                                             ha->host_no, exist_fcport->loop_id,
 919                                             exist_fcport->d_id.b.domain,
 920                                             exist_fcport->d_id.b.area,
 921                                             exist_fcport->d_id.b.al_pa));
 922
 923                                         exist_fcport->iodesc_idx_sent =
 924                                             IODESC_INVALID_INDEX;
 925                                 }
 926
 927                         }
 928
 929                         /* Update existing fcport with remote fcport info. */
 930                         DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
 931                             "existing fcport [%x/%02x%02x%02x] online.\n",
 932                             ha->host_no, remote_loopid, remote_did.b.domain,
 933                             remote_did.b.area, remote_did.b.al_pa));
 934
 935                         memcpy(exist_fcport->node_name,
 936                             remote_fcport->node_name, WWN_SIZE);
 937                         exist_fcport->loop_id = remote_loopid;
 938                         exist_fcport->d_id.b24 = remote_did.b24;
 939                         qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);
 940
 941                         /* Finally, free the remote (RSCN) fcport. */
 942                         if (!reuse) {
 943                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
 944                                     "Freeing RSCN fcport %p "
 945                                     "[%x/%02x%02x%02x].\n", ha->host_no,
 946                                     remote_fcport, remote_fcport->loop_id,
 947                                     remote_fcport->d_id.b.domain,
 948                                     remote_fcport->d_id.b.area,
 949                                     remote_fcport->d_id.b.al_pa));
 950
 951                                 list_del(&remote_fcport->list);
 952                                 kfree(remote_fcport);
 953                         }
 954
 955                         return (QLA_SUCCESS);
 956                 }
 957
 958                 /*
 959                  * A new device has been added, move the RSCN fcport to our
 960                  * fcports list.
 961                  */
 962                 DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
 963                     "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
 964                     remote_fcport->loop_id, remote_fcport->d_id.b.domain,
 965                     remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
 966
 967                 list_del(&remote_fcport->list);
 968                 remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
 969                 qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
 970                 list_add_tail(&remote_fcport->list, &ha->fcports);
 971                 set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
 972         } else {
 973                 /* Handle login failure. */
 974                 if (remote_fcport->login_retry != 0) {
 975                         if (mb[0] == MBS_LOOP_ID_USED) {
 976                                 inuse_did.b.domain = LSB(mb[1]);
 977                                 inuse_did.b.area = MSB(mb[2]);
 978                                 inuse_did.b.al_pa = LSB(mb[2]);
 979
 980                                 DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
 981                                     "id [%x] used by port id [%02x%02x%02x].\n",
 982                                     ha->host_no, remote_fcport->loop_id,
 983                                     inuse_did.b.domain, inuse_did.b.area,
 984                                     inuse_did.b.al_pa));
 985
 986                                 if (remote_fcport->d_id.b24 ==
 987                                     INVALID_PORT_ID) {
 988                                         /*
 989                                          * Invalid port id means we are trying
 990                                          * to login to a remote port with just
 991                                          * a loop id without knowing about the
 992                                          * port id.  Copy the port id and try
 993                                          * again.
 994                                          */
 995                                         remote_fcport->d_id.b24 = inuse_did.b24;
 996                                         iodesc->d_id.b24 = inuse_did.b24;
 997                                 } else {
 998                                         remote_fcport->loop_id++;
 999                                         rval = qla2x00_find_new_loop_id(ha,
1000                                             remote_fcport);
1001                                         if (rval == QLA_FUNCTION_FAILED) {
1002                                                 /* No more loop ids. */
1003                                                 return (QLA_SUCCESS);
1004                                         }
1005                                 }
1006                         } else if (mb[0] == MBS_PORT_ID_USED) {
1007                                 /*
1008                                  * Device has another loop ID.  The firmware
1009                                  * group recommends the driver perform an
1010                                  * implicit login with the specified ID.
1011                                  */
1012                                 DEBUG14(printk("scsi(%ld): Login IOCB -- port "
1013                                     "id [%02x%02x%02x] already assigned to "
1014                                     "loop id [%x].\n", ha->host_no,
1015                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
1016                                     iodesc->d_id.b.al_pa, mb[1]));
1017
1018                                 remote_fcport->loop_id = mb[1];
1019
1020                         } else {
1021                                 /* Unable to perform login, try again. */
1022                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
1023                                     "failed login [%x/%02x%02x%02x], status=%x "
1024                                     "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
1025                                     ha->host_no, remote_fcport->loop_id,
1026                                     iodesc->d_id.b.domain, iodesc->d_id.b.area,
1027                                     iodesc->d_id.b.al_pa, status, mb[0], mb[1],
1028                                     mb[2], mb[6], mb[7]));
1029                         }
1030
1031                         /* Reissue Login with the same IO descriptor. */
1032                         iodesc->signature =
1033                             qla2x00_iodesc_to_handle(iodesc);
1034                         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
1035                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
1036                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1037                         remote_fcport->login_retry--;
1038
1039                         DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
1040                             "login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
1041                             remote_fcport->loop_id,
1042                             remote_fcport->d_id.b.domain,
1043                             remote_fcport->d_id.b.area,
1044                             remote_fcport->d_id.b.al_pa,
1045                             remote_fcport->login_retry));
1046
1047                         qla2x00_send_login_iocb(ha, iodesc,
1048                             &remote_fcport->d_id, 1);
1049
1050                         return (QLA_FUNCTION_FAILED);
1051                 } else {
1052                         /* No more logins, mark device dead. */
1053                         DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
1054                             "login [%x/%02x%02x%02x] after retries, status=%x "
1055                             "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
1056                             ha->host_no, remote_fcport->loop_id,
1057                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1058                             iodesc->d_id.b.al_pa, status, mb[0], mb[1],
1059                             mb[2], mb[6], mb[7]));
1060
1061                         atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
1062                         if (remote_fcport->port_type == FCT_RSCN) {
1063                                 DEBUG14(printk("scsi(%ld): Login IOCB -- "
1064                                     "Freeing dead RSCN fcport %p "
1065                                     "[%x/%02x%02x%02x].\n", ha->host_no,
1066                                     remote_fcport, remote_fcport->loop_id,
1067                                     remote_fcport->d_id.b.domain,
1068                                     remote_fcport->d_id.b.area,
1069                                     remote_fcport->d_id.b.al_pa));
1070
1071                                 list_del(&remote_fcport->list);
1072                                 kfree(remote_fcport);
1073                         }
1074                 }
1075         }
1076
1077         return (QLA_SUCCESS);
1078 }
1079
1080
1081 /**
1082  * IO descriptor processing routines.
1083  **/
1084
1085 /**
1086  * qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
1087  * @ha: HA context
1088  * @flags: allocation flags
1089  *
1090  * Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
1091  */
1092 fc_port_t *
1093 qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, int flags)
1094 {
1095         fc_port_t *fcport;
1096
1097         fcport = qla2x00_alloc_fcport(ha, flags);
1098         if (fcport == NULL)
1099                 return (fcport);
1100
1101         /* Setup RSCN fcport structure. */
1102         fcport->port_type = FCT_RSCN;
1103
1104         return (fcport);
1105 }
1106
1107 /**
1108  * qla2x00_handle_port_rscn() - Handle port RSCN.
1109  * @ha: HA context
1110  * @rscn_entry: RSCN entry
1111  * @fcport: fcport entry to updated
1112  *
1113  * Returns QLA_SUCCESS if the port RSCN was handled.
1114  */
1115 int
1116 qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
1117     fc_port_t *known_fcport, int ha_locked)
1118 {
1119         int     rval;
1120         port_id_t rscn_pid;
1121         fc_port_t *fcport, *remote_fcport, *rscn_fcport;
1122         struct io_descriptor *iodesc;
1123
1124         remote_fcport = NULL;
1125         rscn_fcport = NULL;
1126
1127         /* Prepare port id based on incoming entries. */
1128         if (known_fcport) {
1129                 rscn_pid.b24 = known_fcport->d_id.b24;
1130                 remote_fcport = known_fcport;
1131
1132                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1133                     "fcport [%02x%02x%02x].\n", ha->host_no,
1134                     remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
1135                     remote_fcport->d_id.b.al_pa));
1136         } else {
1137                 rscn_pid.b.domain = LSB(MSW(rscn_entry));
1138                 rscn_pid.b.area = MSB(LSW(rscn_entry));
1139                 rscn_pid.b.al_pa = LSB(LSW(rscn_entry));
1140
1141                 DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
1142                     "port id [%02x%02x%02x].\n", ha->host_no,
1143                     rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));
1144
1145                 /*
1146                  * Search fcport lists for a known entry at the specified port
1147                  * ID.
1148                  */
1149                 list_for_each_entry(fcport, &ha->fcports, list) {
1150                     if (rscn_pid.b24 == fcport->d_id.b24) {
1151                             remote_fcport = fcport;
1152                             break;
1153                     }
1154                 }
1155                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1156                     if (rscn_pid.b24 == fcport->d_id.b24) {
1157                             rscn_fcport = fcport;
1158                             break;
1159                     }
1160                 }
1161                 if (remote_fcport == NULL)
1162                     remote_fcport = rscn_fcport;
1163         }
1164
1165         /*
1166          * If the port is already in our fcport list and online, send an ADISC
1167          * to see if it's still alive.  Issue login if a new fcport or the known
1168          * fcport is currently offline.
1169          */
1170         if (remote_fcport) {
1171                 /*
1172                  * No need to send request if the remote fcport is currently
1173                  * waiting for an available io descriptor.
1174                  */
1175                 if (known_fcport == NULL &&
1176                     (remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1177                     remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
1178                         /*
1179                          * If previous waiting io descriptor is an ADISC, then
1180                          * the new RSCN may come from a new remote fcport being
1181                          * plugged into the same location.
1182                          */
1183                         if (remote_fcport->port_type == FCT_RSCN) {
1184                             remote_fcport->iodesc_idx_sent =
1185                                 IODESC_LOGIN_NEEDED;
1186                         } else if (remote_fcport->iodesc_idx_sent ==
1187                             IODESC_ADISC_NEEDED) {
1188                                 fc_port_t *new_fcport;
1189
1190                                 remote_fcport->iodesc_idx_sent =
1191                                     IODESC_INVALID_INDEX;
1192
1193                                 /* Create new fcport for later login. */
1194                                 new_fcport = qla2x00_alloc_rscn_fcport(ha,
1195                                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1196                                 if (new_fcport) {
1197                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1198                                             "-- creating RSCN fcport %p for "
1199                                             "future login.\n", ha->host_no,
1200                                             new_fcport));
1201
1202                                         new_fcport->d_id.b24 =
1203                                             remote_fcport->d_id.b24;
1204                                         new_fcport->iodesc_idx_sent =
1205                                             IODESC_LOGIN_NEEDED;
1206
1207                                         list_add_tail(&new_fcport->list,
1208                                             &ha->rscn_fcports);
1209                                         set_bit(IODESC_PROCESS_NEEDED,
1210                                             &ha->dpc_flags);
1211                                 } else {
1212                                         DEBUG14(printk("scsi(%ld): Handle RSCN "
1213                                             "-- unable to allocate RSCN fcport "
1214                                             "for future login.\n",
1215                                             ha->host_no));
1216                                 }
1217                         }
1218                         return (QLA_SUCCESS);
1219                 }
1220
1221                 /* Send ADISC if the fcport is online */
1222                 if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
1223                     remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {
1224
1225                         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1226
1227                         iodesc = qla2x00_alloc_iodesc(ha);
1228                         if (iodesc == NULL) {
1229                                 /* Mark fcport for later adisc processing */
1230                                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
1231                                     "enough IO descriptors for Adisc, flag "
1232                                     "for later processing.\n", ha->host_no));
1233
1234                                 remote_fcport->iodesc_idx_sent =
1235                                     IODESC_ADISC_NEEDED;
1236                                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1237
1238                                 return (QLA_SUCCESS);
1239                         }
1240
1241                         iodesc->cb_idx = ADISC_PORT_IOCB_CB;
1242                         iodesc->d_id.b24 = rscn_pid.b24;
1243                         iodesc->remote_fcport = remote_fcport;
1244                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1245                         qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);
1246
1247                         return (QLA_SUCCESS);
1248                 } else if (remote_fcport->iodesc_idx_sent <
1249                     MAX_IO_DESCRIPTORS &&
1250                     ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
1251                     ADISC_PORT_IOCB_CB) {
1252                         /*
1253                          * Receiving another RSCN while an ADISC is pending,
1254                          * abort the IOCB.  Use the same descriptor for the
1255                          * abort.
1256                          */
1257                         uint32_t handle_to_abort;
1258
1259                         iodesc = &ha->io_descriptors[
1260                                 remote_fcport->iodesc_idx_sent];
1261                         qla2x00_remove_iodesc_timer(iodesc);
1262                         handle_to_abort = iodesc->signature;
1263                         iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
1264                         iodesc->cb_idx = ABORT_IOCB_CB;
1265                         iodesc->d_id.b24 = remote_fcport->d_id.b24;
1266                         iodesc->remote_fcport = remote_fcport;
1267                         remote_fcport->iodesc_idx_sent = iodesc->idx;
1268
1269                         DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
1270                             "abort to outstanding Adisc [%x/%02x%02x%02x].\n",
1271                             ha->host_no, remote_fcport->loop_id,
1272                             iodesc->d_id.b.domain, iodesc->d_id.b.area,
1273                             iodesc->d_id.b.al_pa));
1274
1275                         qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
1276                             ha_locked);
1277                 }
1278         }
1279
1280         /* We need to login to the remote port, find it. */
1281         if (known_fcport) {
1282                 remote_fcport = known_fcport;
1283         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1284             rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
1285             ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
1286             LOGIN_PORT_IOCB_CB) {
1287                 /*
1288                  * Ignore duplicate RSCN on fcport which has already
1289                  * initiated a login IOCB.
1290                  */
1291                 DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
1292                     "already sent to [%02x%02x%02x].\n", ha->host_no,
1293                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1294                     rscn_fcport->d_id.b.al_pa));
1295
1296                 return (QLA_SUCCESS);
1297         } else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
1298             rscn_fcport != remote_fcport) {
1299                 /* Reuse same rscn fcport. */
1300                 DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
1301                     "[%02x%02x%02x].\n", ha->host_no,
1302                     rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
1303                     rscn_fcport->d_id.b.al_pa));
1304
1305                 remote_fcport = rscn_fcport;
1306         } else {
1307                 /* Create new fcport for later login. */
1308                 remote_fcport = qla2x00_alloc_rscn_fcport(ha,
1309                     ha_locked ? GFP_ATOMIC: GFP_KERNEL);
1310                 list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
1311         }
1312         if (remote_fcport == NULL)
1313                 return (QLA_SUCCESS);
1314
1315         /* Prepare fcport for login. */
1316         atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
1317         remote_fcport->login_retry = 3; /* ha->login_retry_count; */
1318         remote_fcport->d_id.b24 = rscn_pid.b24;
1319
1320         iodesc = qla2x00_alloc_iodesc(ha);
1321         if (iodesc == NULL) {
1322                 /* Mark fcport for later adisc processing. */
1323                 DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
1324                     "descriptors for Login, flag for later processing.\n",
1325                     ha->host_no));
1326
1327                 remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
1328                 set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1329
1330                 return (QLA_SUCCESS);
1331         }
1332
1333         if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
1334                 remote_fcport->loop_id = ha->min_external_loopid;
1335
1336                 rval = qla2x00_find_new_loop_id(ha, remote_fcport);
1337                 if (rval == QLA_FUNCTION_FAILED) {
1338                         /* No more loop ids, failed. */
1339                         DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
1340                             "loop id to perform Login, failed.\n",
1341                             ha->host_no));
1342
1343                         return (rval);
1344                 }
1345         }
1346
1347         iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
1348         iodesc->d_id.b24 = rscn_pid.b24;
1349         iodesc->remote_fcport = remote_fcport;
1350         remote_fcport->iodesc_idx_sent = iodesc->idx;
1351
1352         DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
1353             "[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
1354             iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));
1355
1356         qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);
1357
1358         return (QLA_SUCCESS);
1359 }
1360
1361 /**
1362  * qla2x00_process_iodesc() - Complete IO descriptor processing.
1363  * @ha: HA context
1364  * @mbxstat: Mailbox IOCB status
1365  */
1366 void
1367 qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
1368 {
1369         int rval;
1370         uint32_t signature;
1371         fc_port_t *fcport;
1372         struct io_descriptor *iodesc;
1373
1374         signature = mbxstat->handle;
1375
1376         DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
1377             ha->host_no, signature));
1378
1379         /* Retrieve proper IO descriptor. */
1380         iodesc = qla2x00_handle_to_iodesc(ha, signature);
1381         if (iodesc == NULL) {
1382                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1383                     "incorrect signature %08x.\n", ha->host_no, signature));
1384
1385                 return;
1386         }
1387
1388         /* Stop IO descriptor timer. */
1389         qla2x00_remove_iodesc_timer(iodesc);
1390
1391         /* Verify signature match. */
1392         if (iodesc->signature != signature) {
1393                 DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
1394                     "signature mismatch, sent %08x, received %08x.\n",
1395                     ha->host_no, iodesc->signature, signature));
1396
1397                 return;
1398         }
1399
1400         /* Go with IOCB callback. */
1401         rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
1402         if (rval != QLA_SUCCESS) {
1403                 /* IO descriptor reused by callback. */
1404                 return;
1405         }
1406
1407         qla2x00_free_iodesc(iodesc);
1408
1409         if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
1410                 /* Scan our fcports list for any RSCN requests. */
1411                 list_for_each_entry(fcport, &ha->fcports, list) {
1412                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1413                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1414                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1415                                 return;
1416                         }
1417                 }
1418
1419                 /* Scan our RSCN fcports list for any RSCN requests. */
1420                 list_for_each_entry(fcport, &ha->rscn_fcports, list) {
1421                         if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
1422                             fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
1423                                 qla2x00_handle_port_rscn(ha, 0, fcport, 1);
1424                                 return;
1425                         }
1426                 }
1427         }
1428         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1429 }
1430
1431 /**
1432  * qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
1433  * @ha: HA context
1434  *
1435  * This routine will also delete any RSCN entries related to the outstanding
1436  * IO descriptors.
1437  */
1438 void
1439 qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
1440 {
1441         fc_port_t *fcport, *fcptemp;
1442
1443         clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
1444
1445         /* Abort all IO descriptors. */
1446         qla2x00_init_io_descriptors(ha);
1447
1448         /* Reset all pending IO descriptors in fcports list. */
1449         list_for_each_entry(fcport, &ha->fcports, list) {
1450                 fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
1451         }
1452
1453         /* Reset all pending IO descriptors in rscn fcports list. */
1454         list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
1455                 DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
1456                     "%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
1457                     fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
1458                     fcport->d_id.b.al_pa));
1459
1460                 list_del(&fcport->list);
1461                 kfree(fcport);
1462         }
1463 }