drivers/fc4/fc.c

   1 /* fc.c: Generic Fibre Channel and FC4 SCSI driver.
   2  *
   3  * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
   4  * Copyright (C) 1997,1998 Jirka Hanika (geo@ff.cuni.cz)
   5  *
   6  * There are two kinds of Fibre Channel adapters used in Linux. Either
   7  * the adapter is "smart" and does all FC bookkeeping by itself and
   8  * just presents a standard SCSI interface to the operating system
   9  * (that's e.g. the case with Qlogic FC cards), or leaves most of the FC
  10  * bookkeeping to the OS (e.g. soc, socal). Drivers for the former adapters
  11  * will look like normal SCSI drivers (with the exception of max_id will be
  12  * usually 127), the latter on the other side allows SCSI, IP over FC and other
  13  * protocols. This driver tree is for the latter adapters.
  14  *
  15  * This file should support both Point-to-Point and Arbitrated Loop topologies.
  16  *
  17  * Sources:
  18  *      Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994
  19  *      dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995
  20  *      Fibre Channel Arbitrated Loop (FC-AL), Rev. 4.5, 1995
  21  *      Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), Rev. 2.1, 1997
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/jiffies.h>
  27 #include <linux/types.h>
  28 #include <linux/fcntl.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/ptrace.h>
  31 #include <linux/ioport.h>
  32 #include <linux/in.h>
  33 #include <linux/slab.h>
  34 #include <linux/string.h>
  35 #include <linux/init.h>
  36
  37 #include <asm/pgtable.h>
  38 #include <asm/irq.h>
  39 #include <asm/semaphore.h>
  40 #include "fcp_impl.h"
  41 #include <scsi/scsi_host.h>
  42
  43 /* #define FCDEBUG */
  44
  45 #define fc_printk printk ("%s: ", fc->name); printk
  46
  47 #ifdef FCDEBUG
  48 #define FCD(x)  fc_printk x;
  49 #define FCND(x) printk ("FC: "); printk x;
  50 #else
  51 #define FCD(x)
  52 #define FCND(x)
  53 #endif
  54
  55 #ifdef __sparc__
  56 #define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p)
  57 #define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h)
  58 #define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir)
  59 #define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir)
  60 #define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir)
  61 #define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir)
  62 #else
  63 #define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p)
  64 #define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h)
  65 #define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir)
  66 #define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir)
  67 #define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir)
  68 #define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir)
  69 #endif
  70
  71 #define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp))
  72 #define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->device->host->hostdata[0]))
  73 #define SC_FCMND(fcmnd) ((struct scsi_cmnd *)((long)fcmnd - (long)&(((struct scsi_cmnd *)0)->SCp)))
  74
  75 static int fcp_scsi_queue_it(fc_channel *, struct scsi_cmnd *, fcp_cmnd *, int);
  76 void fcp_queue_empty(fc_channel *);
  77
  78 static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd)
  79 {
  80         if (!fc->scsi_que) {
  81                 fc->scsi_que = fcmd;
  82                 fcmd->next = fcmd;
  83                 fcmd->prev = fcmd;
  84         } else {
  85                 fc->scsi_que->prev->next = fcmd;
  86                 fcmd->prev = fc->scsi_que->prev;
  87                 fc->scsi_que->prev = fcmd;
  88                 fcmd->next = fc->scsi_que;
  89         }
  90 }
  91
  92 static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd)
  93 {
  94         if (fcmd == fcmd->next) {
  95                 fc->scsi_que = NULL;
  96                 return;
  97         }
  98         if (fcmd == fc->scsi_que)
  99                 fc->scsi_que = fcmd->next;
 100         fcmd->prev->next = fcmd->next;
 101         fcmd->next->prev = fcmd->prev;
 102 }
 103
 104 fc_channel *fc_channels = NULL;
 105
 106 #define LSMAGIC 620829043
 107 typedef struct {
 108         /* Must be first */
 109         struct semaphore sem;
 110         int magic;
 111         int count;
 112         logi *logi;
 113         fcp_cmnd *fcmds;
 114         atomic_t todo;
 115         struct timer_list timer;
 116         unsigned char grace[0];
 117 } ls;
 118
 119 #define LSOMAGIC 654907799
 120 typedef struct {
 121         /* Must be first */
 122         struct semaphore sem;
 123         int magic;
 124         int count;
 125         fcp_cmnd *fcmds;
 126         atomic_t todo;
 127         struct timer_list timer;
 128 } lso;
 129
 130 #define LSEMAGIC 84482456
 131 typedef struct {
 132         /* Must be first */
 133         struct semaphore sem;
 134         int magic;
 135         int status;
 136         struct timer_list timer;
 137 } lse;
 138
 139 static void fcp_login_timeout(unsigned long data)
 140 {
 141         ls *l = (ls *)data;
 142         FCND(("Login timeout\n"))
 143         up(&l->sem);
 144 }
 145
 146 static void fcp_login_done(fc_channel *fc, int i, int status)
 147 {
 148         fcp_cmnd *fcmd;
 149         logi *plogi;
 150         fc_hdr *fch;
 151         ls *l = (ls *)fc->ls;
 152
 153         FCD(("Login done %d %d\n", i, status))
 154         if (i < l->count) {
 155                 if (fc->state == FC_STATE_FPORT_OK) {
 156                         FCD(("Additional FPORT_OK received with status %d\n", status))
 157                         return;
 158                 }
 159                 switch (status) {
 160                 case FC_STATUS_OK: /* Oh, we found a fabric */
 161                 case FC_STATUS_P_RJT: /* Oh, we haven't found any */
 162                         fc->state = FC_STATE_FPORT_OK;
 163                         fcmd = l->fcmds + i;
 164                         plogi = l->logi + 3 * i;
 165                         dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi),
 166                                           DMA_BIDIRECTIONAL);
 167                         plogi->code = LS_PLOGI;
 168                         memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
 169                         memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
 170                         memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm));
 171                         memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm));
 172                         fch = &fcmd->fch;
 173                         fcmd->token += l->count;
 174                         FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did);
 175                         FILL_FCHDR_SID(fch, fc->sid);
 176 #ifdef FCDEBUG
 177                         {
 178                                 int i;
 179                                 unsigned *x = (unsigned *)plogi;
 180                                 printk ("logi: ");
 181                                 for (i = 0; i < 21; i++)
 182                                         printk ("%08x ", x[i]);
 183                                 printk ("\n");
 184                         }
 185 #endif
 186                         fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi),
 187                                                     DMA_BIDIRECTIONAL);
 188                         fcmd->rsp = fcmd->cmd + 2 * sizeof(logi);
 189                         if (fc->hw_enque (fc, fcmd))
 190                                 printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name);
 191                         break;
 192                 case FC_STATUS_ERR_OFFLINE:
 193                         fc->state = FC_STATE_MAYBEOFFLINE;
 194                         FCD (("FC is offline %d\n", l->grace[i]))
 195                         break;
 196                 default:
 197                         printk ("FLOGI failed for %s with status %d\n", fc->name, status);
 198                         /* Do some sort of error recovery here */
 199                         break;
 200                 }
 201         } else {
 202                 i -= l->count;
 203                 if (fc->state != FC_STATE_FPORT_OK) {
 204                         FCD(("Unexpected N-PORT rsp received"))
 205                         return;
 206                 }
 207                 switch (status) {
 208                 case FC_STATUS_OK:
 209                         plogi = l->logi + 3 * i;
 210                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
 211                                           DMA_BIDIRECTIONAL);
 212                         if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) {
 213                                 memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn));
 214                                 FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo))
 215                         } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo ||
 216                                    fc->wwn_dest.hi != plogi[1].node_wwn.hi) {
 217                                 printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n",
 218                                         fc->name,
 219                                         *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo,
 220                                         *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo);
 221                         }
 222                         fc->state = FC_STATE_ONLINE;
 223                         printk ("%s: ONLINE\n", fc->name);
 224                         if (atomic_dec_and_test (&l->todo))
 225                                 up(&l->sem);
 226                         break;
 227                 case FC_STATUS_ERR_OFFLINE:
 228                         fc->state = FC_STATE_OFFLINE;
 229                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
 230                                           DMA_BIDIRECTIONAL);
 231                         printk ("%s: FC is offline\n", fc->name);
 232                         if (atomic_dec_and_test (&l->todo))
 233                                 up(&l->sem);
 234                         break;
 235                 default:
 236                         printk ("PLOGI failed for %s with status %d\n", fc->name, status);
 237                         /* Do some sort of error recovery here */
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void fcp_report_map_done(fc_channel *fc, int i, int status)
 244 {
 245         fcp_cmnd *fcmd;
 246         fc_hdr *fch;
 247         unsigned char j;
 248         ls *l = (ls *)fc->ls;
 249         fc_al_posmap *p;
 250
 251         FCD(("Report map done %d %d\n", i, status))
 252         switch (status) {
 253         case FC_STATUS_OK: /* Ok, let's have a fun on a loop */
 254                 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
 255                                   DMA_BIDIRECTIONAL);
 256                 p = (fc_al_posmap *)(l->logi + 3 * i);
 257 #ifdef FCDEBUG
 258                 {
 259                 u32 *u = (u32 *)p;
 260                 FCD(("%08x\n", u[0]))
 261                 u ++;
 262                 FCD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n", u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
 263                 }
 264 #endif
 265                 if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) {
 266                         printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic);
 267                         fc->state = FC_STATE_OFFLINE;
 268                 } else {
 269                         fc->posmap = kzalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL);
 270                         if (!fc->posmap) {
 271                                 printk("FC: Not enough memory, offlining channel\n");
 272                                 fc->state = FC_STATE_OFFLINE;
 273                         } else {
 274                                 int k;
 275                                 /* FIXME: This is where SOCAL transfers our AL-PA.
 276                                    Keep it here till we found out what other cards do... */
 277                                 fc->sid = (p->magic & 0xff);
 278                                 for (i = 0; i < p->len; i++)
 279                                         if (p->alpa[i] == fc->sid)
 280                                                 break;
 281                                 k = p->len;
 282                                 if (i == p->len)
 283                                         i = 0;
 284                                 else {
 285                                         p->len--;
 286                                         i++;
 287                                 }
 288                                 fc->posmap->len = p->len;
 289                                 for (j = 0; j < p->len; j++) {
 290                                         if (i == k) i = 0;
 291                                         fc->posmap->list[j] = p->alpa[i++];
 292                                 }
 293                                 fc->state = FC_STATE_ONLINE;
 294                         }
 295                 }
 296                 printk ("%s: ONLINE\n", fc->name);
 297                 if (atomic_dec_and_test (&l->todo))
 298                         up(&l->sem);
 299                 break;
 300         case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */
 301                 FCD(("SID %d DID %d\n", fc->sid, fc->did))
 302                 fcmd = l->fcmds + i;
 303                 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi),
 304                                  DMA_BIDIRECTIONAL);
 305                 fch = &fcmd->fch;
 306                 memset(l->logi + 3 * i, 0, 3 * sizeof(logi));
 307                 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
 308                 FILL_FCHDR_SID(fch, 0);
 309                 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
 310                 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
 311                 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
 312                 fch->param = 0;
 313                 l->logi [3 * i].code = LS_FLOGI;
 314                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
 315                                             DMA_BIDIRECTIONAL);
 316                 fcmd->rsp = fcmd->cmd + sizeof(logi);
 317                 fcmd->cmdlen = sizeof(logi);
 318                 fcmd->rsplen = sizeof(logi);
 319                 fcmd->data = (dma_addr_t)NULL;
 320                 fcmd->class = FC_CLASS_SIMPLE;
 321                 fcmd->proto = TYPE_EXTENDED_LS;
 322                 if (fc->hw_enque (fc, fcmd))
 323                         printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name);
 324                 break;
 325         case FC_STATUS_ERR_OFFLINE:
 326                 fc->state = FC_STATE_MAYBEOFFLINE;
 327                 FCD (("FC is offline %d\n", l->grace[i]))
 328                 break;
 329         default:
 330                 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
 331                 /* Do some sort of error recovery here */
 332                 break;
 333         }
 334 }
 335
 336 void fcp_register(fc_channel *fc, u8 type, int unregister)
 337 {
 338         int size, i;
 339         int slots = (fc->can_queue * 3) >> 1;
 340
 341         FCND(("Going to %sregister\n", unregister ? "un" : ""))
 342
 343         if (type == TYPE_SCSI_FCP) {
 344                 if (!unregister) {
 345                         fc->scsi_cmd_pool = (fcp_cmd *)
 346                                 dma_alloc_consistent (fc->dev,
 347                                                       slots * (sizeof (fcp_cmd) + fc->rsp_size),
 348                                                       &fc->dma_scsi_cmd);
 349                         fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots);
 350                         fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd);
 351                         fc->scsi_bitmap_end = (slots + 63) & ~63;
 352                         size = fc->scsi_bitmap_end / 8;
 353                         fc->scsi_bitmap = kzalloc (size, GFP_KERNEL);
 354                         set_bit (0, fc->scsi_bitmap);
 355                         for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++)
 356                                 set_bit (i, fc->scsi_bitmap);
 357                         fc->scsi_free = fc->can_queue;
 358                         fc->cmd_slots = kzalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);
 359                         fc->abort_count = 0;
 360                 } else {
 361                         fc->scsi_name[0] = 0;
 362                         kfree (fc->scsi_bitmap);
 363                         kfree (fc->cmd_slots);
 364                         FCND(("Unregistering\n"));
 365 #if 0
 366                         if (fc->rst_pkt) {
 367                                 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
 368                                         kfree(fc->rst_pkt);
 369                                 else {
 370                                         /* Can't happen. Some memory would be lost. */
 371                                         printk("FC: Reset in progress. Now?!");
 372                                 }
 373                         }
 374 #endif
 375                         FCND(("Unregistered\n"));
 376                 }
 377         } else
 378                 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
 379 }
 380
 381 static void fcp_scsi_done(struct scsi_cmnd *SCpnt);
 382
 383 static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
 384 {
 385         fcp_cmnd *fcmd;
 386         fcp_rsp  *rsp;
 387         int host_status;
 388         struct scsi_cmnd *SCpnt;
 389         int sense_len;
 390         int rsp_status;
 391
 392         fcmd = fc->cmd_slots[token];
 393         if (!fcmd) return;
 394         rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
 395         SCpnt = SC_FCMND(fcmd);
 396
 397         if (SCpnt->done != fcp_scsi_done)
 398                 return;
 399
 400         rsp_status = rsp->fcp_status;
 401         FCD(("rsp_status %08x status %08x\n", rsp_status, status))
 402         switch (status) {
 403         case FC_STATUS_OK:
 404                 host_status=DID_OK;
 405
 406                 if (rsp_status & FCP_STATUS_RESID) {
 407 #ifdef FCDEBUG
 408                         FCD(("Resid %d\n", rsp->fcp_resid))
 409                         {
 410                                 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
 411                                 int i;
 412
 413                                 printk ("Command ");
 414                                 for (i = 0; i < sizeof(fcp_cmd); i+=4)
 415                                         printk ("%08x ", *(u32 *)(((char *)cmd)+i));
 416                                 printk ("\nResponse ");
 417                                 for (i = 0; i < fc->rsp_size; i+=4)
 418                                         printk ("%08x ", *(u32 *)(((char *)rsp)+i));
 419                                 printk ("\n");
 420                         }
 421 #endif
 422                 }
 423
 424                 if (rsp_status & FCP_STATUS_SENSE_LEN) {
 425                         sense_len = rsp->fcp_sense_len;
 426                         if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
 427                         memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
 428                 }
 429
 430                 if (fcmd->data)
 431                         dma_unmap_sg(fc->dev, scsi_sglist(SCpnt),
 432                                      scsi_sg_count(SCpnt),
 433                                      SCpnt->sc_data_direction);
 434                 break;
 435         default:
 436                 host_status=DID_ERROR; /* FIXME */
 437                 FCD(("Wrong FC status %d for token %d\n", status, token))
 438                 break;
 439         }
 440
 441         if (status_byte(rsp_status) == QUEUE_FULL) {
 442                 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status);
 443         }
 444
 445         SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
 446 #ifdef FCDEBUG
 447         if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
 448                         host_status, SCpnt->result);
 449 #endif
 450         SCpnt->done = fcmd->done;
 451         fcmd->done=NULL;
 452         clear_bit(token, fc->scsi_bitmap);
 453         fc->scsi_free++;
 454         FCD(("Calling scsi_done with %08x\n", SCpnt->result))
 455         SCpnt->scsi_done(SCpnt);
 456 }
 457
 458 void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
 459 {
 460         int magic;
 461         FCD(("receive_solicited %d %d %d\n", proto, token, status))
 462         switch (proto) {
 463         case TYPE_SCSI_FCP:
 464                 fcp_scsi_receive(fc, token, status, fch); break;
 465         case TYPE_EXTENDED_LS:
 466         case PROTO_REPORT_AL_MAP:
 467                 magic = 0;
 468                 if (fc->ls)
 469                         magic = ((ls *)(fc->ls))->magic;
 470                 if (magic == LSMAGIC) {
 471                         ls *l = (ls *)fc->ls;
 472                         int i = (token >= l->count) ? token - l->count : token;
 473
 474                         /* Let's be sure */
 475                         if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
 476                                 if (proto == TYPE_EXTENDED_LS)
 477                                         fcp_login_done(fc, token, status);
 478                                 else
 479                                         fcp_report_map_done(fc, token, status);
 480                                 break;
 481                         }
 482                 }
 483                 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
 484                 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
 485                         fcp_cmnd *fcmd;
 486
 487                         fcmd = fc->cmd_slots[token];
 488                         if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
 489                                 lse *l = (lse *)fcmd->ls;
 490
 491                                 l->status = status;
 492                                 up (&l->sem);
 493                         }
 494                 }
 495                 break;
 496         case PROTO_OFFLINE:
 497                 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
 498                         lso *l = (lso *)fc->ls;
 499
 500                         if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
 501                                 /* Wow, OFFLINE response arrived :) */
 502                                 FCD(("OFFLINE Response arrived\n"))
 503                                 fc->state = FC_STATE_OFFLINE;
 504                                 if (atomic_dec_and_test (&l->todo))
 505                                         up(&l->sem);
 506                         }
 507                 }
 508                 break;
 509
 510         default:
 511                 break;
 512         }
 513 }
 514
 515 void fcp_state_change(fc_channel *fc, int state)
 516 {
 517         FCD(("state_change %d %d\n", state, fc->state))
 518         if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
 519                 fc->state = FC_STATE_UNINITED;
 520         else if (state == FC_STATE_ONLINE)
 521                 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
 522         else
 523                 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
 524 }
 525
 526 int fcp_initialize(fc_channel *fcchain, int count)
 527 {
 528         fc_channel *fc;
 529         fcp_cmnd *fcmd;
 530         int i, retry, ret;
 531         ls *l;
 532
 533         FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
 534         FCND(("fc_channels %08lx\n", (long)fc_channels))
 535         FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
 536         l = kzalloc(sizeof (ls) + count, GFP_KERNEL);
 537         if (!l) {
 538                 printk ("FC: Cannot allocate memory for initialization\n");
 539                 return -ENOMEM;
 540         }
 541         l->magic = LSMAGIC;
 542         l->count = count;
 543         FCND(("FCP Init for %d channels\n", count))
 544         init_MUTEX_LOCKED(&l->sem);
 545         init_timer(&l->timer);
 546         l->timer.function = fcp_login_timeout;
 547         l->timer.data = (unsigned long)l;
 548         atomic_set (&l->todo, count);
 549         l->logi = kzalloc (count * 3 * sizeof(logi), GFP_KERNEL);
 550         l->fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
 551         if (!l->logi || !l->fcmds) {
 552                 kfree (l->logi);
 553                 kfree (l->fcmds);
 554                 kfree (l);
 555                 printk ("FC: Cannot allocate DMA memory for initialization\n");
 556                 return -ENOMEM;
 557         }
 558         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 559                 fc->state = FC_STATE_UNINITED;
 560                 fc->rst_pkt = NULL;     /* kmalloc when first used */
 561         }
 562         /* First try if we are in a AL topology */
 563         FCND(("Initializing REPORT_MAP packets\n"))
 564         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 565                 fcmd = l->fcmds + i;
 566                 fc->login = fcmd;
 567                 fc->ls = (void *)l;
 568                 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
 569                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
 570                                             DMA_BIDIRECTIONAL);
 571                 fcmd->proto = PROTO_REPORT_AL_MAP;
 572                 fcmd->token = i;
 573                 fcmd->fc = fc;
 574         }
 575         for (retry = 0; retry < 8; retry++) {
 576                 int nqueued = 0;
 577                 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
 578                 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 579                         if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
 580                                 continue;
 581                         disable_irq(fc->irq);
 582                         if (fc->state == FC_STATE_MAYBEOFFLINE) {
 583                                 if (!l->grace[i]) {
 584                                         l->grace[i]++;
 585                                         FCD(("Grace\n"))
 586                                 } else {
 587                                         fc->state = FC_STATE_OFFLINE;
 588                                         enable_irq(fc->irq);
 589                                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 590                                         if (atomic_dec_and_test (&l->todo))
 591                                                 goto all_done;
 592                                 }
 593                         }
 594                         ret = fc->hw_enque (fc, fc->login);
 595                         enable_irq(fc->irq);
 596                         if (!ret) {
 597                                 nqueued++;
 598                                 continue;
 599                         }
 600                         if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
 601                                 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
 602                                 fc_hdr *fch;
 603
 604                                 FCD(("SID %d DID %d\n", fc->sid, fc->did))
 605                                 fcmd = l->fcmds + i;
 606                                 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 607                                 fch = &fcmd->fch;
 608                                 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
 609                                 FILL_FCHDR_SID(fch, 0);
 610                                 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
 611                                 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
 612                                 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
 613                                 fch->param = 0;
 614                                 l->logi [3 * i].code = LS_FLOGI;
 615                                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 616                                 fcmd->rsp = fcmd->cmd + sizeof(logi);
 617                                 fcmd->cmdlen = sizeof(logi);
 618                                 fcmd->rsplen = sizeof(logi);
 619                                 fcmd->data = (dma_addr_t)NULL;
 620                                 fcmd->class = FC_CLASS_SIMPLE;
 621                                 fcmd->proto = TYPE_EXTENDED_LS;
 622                         } else
 623                                 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
 624                 }
 625
 626                 if (nqueued) {
 627                         l->timer.expires = jiffies + 5 * HZ;
 628                         add_timer(&l->timer);
 629
 630                         down(&l->sem);
 631                         if (!atomic_read(&l->todo)) {
 632                                 FCND(("All channels answered in time\n"))
 633                                 break; /* All fc channels have answered us */
 634                         }
 635                 }
 636         }
 637 all_done:
 638         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 639                 fc->ls = NULL;
 640                 switch (fc->state) {
 641                 case FC_STATE_ONLINE: break;
 642                 case FC_STATE_OFFLINE: break;
 643                 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 644                         break;
 645                 }
 646         }
 647         del_timer(&l->timer);
 648         kfree (l->logi);
 649         kfree (l->fcmds);
 650         kfree (l);
 651         return 0;
 652 }
 653
 654 int fcp_forceoffline(fc_channel *fcchain, int count)
 655 {
 656         fc_channel *fc;
 657         fcp_cmnd *fcmd;
 658         int i, ret;
 659         lso l;
 660
 661         memset (&l, 0, sizeof(lso));
 662         l.count = count;
 663         l.magic = LSOMAGIC;
 664         FCND(("FCP Force Offline for %d channels\n", count))
 665         init_MUTEX_LOCKED(&l.sem);
 666         init_timer(&l.timer);
 667         l.timer.function = fcp_login_timeout;
 668         l.timer.data = (unsigned long)&l;
 669         atomic_set (&l.todo, count);
 670         l.fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
 671         if (!l.fcmds) {
 672                 printk ("FC: Cannot allocate memory for forcing offline\n");
 673                 return -ENOMEM;
 674         }
 675         FCND(("Initializing OFFLINE packets\n"))
 676         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 677                 fc->state = FC_STATE_UNINITED;
 678                 fcmd = l.fcmds + i;
 679                 fc->login = fcmd;
 680                 fc->ls = (void *)&l;
 681                 fcmd->did = fc->did;
 682                 fcmd->class = FC_CLASS_OFFLINE;
 683                 fcmd->proto = PROTO_OFFLINE;
 684                 fcmd->token = i;
 685                 fcmd->fc = fc;
 686                 disable_irq(fc->irq);
 687                 ret = fc->hw_enque (fc, fc->login);
 688                 enable_irq(fc->irq);
 689                 if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
 690         }
 691
 692         l.timer.expires = jiffies + 5 * HZ;
 693         add_timer(&l.timer);
 694         down(&l.sem);
 695         del_timer(&l.timer);
 696
 697         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
 698                 fc->ls = NULL;
 699         kfree (l.fcmds);
 700         return 0;
 701 }
 702
 703 int fcp_init(fc_channel *fcchain)
 704 {
 705         fc_channel *fc;
 706         int count=0;
 707         int ret;
 708
 709         for (fc = fcchain; fc; fc = fc->next) {
 710                 fc->fcp_register = fcp_register;
 711                 count++;
 712         }
 713
 714         ret = fcp_initialize (fcchain, count);
 715         if (ret)
 716                 return ret;
 717
 718         if (!fc_channels)
 719                 fc_channels = fcchain;
 720         else {
 721                 for (fc = fc_channels; fc->next; fc = fc->next);
 722                 fc->next = fcchain;
 723         }
 724         return ret;
 725 }
 726
 727 void fcp_release(fc_channel *fcchain, int count)  /* count must > 0 */
 728 {
 729         fc_channel *fc;
 730         fc_channel *fcx;
 731
 732         for (fc = fcchain; --count && fc->next; fc = fc->next);
 733         if (count) {
 734                 printk("FC: nothing to release\n");
 735                 return;
 736         }
 737
 738         if (fc_channels == fcchain)
 739                 fc_channels = fc->next;
 740         else {
 741                 for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
 742                 fcx->next = fc->next;
 743         }
 744         fc->next = NULL;
 745
 746         /*
 747          *  We've just grabbed fcchain out of the fc_channel list
 748          *  and zero-terminated it, while destroying the count.
 749          *
 750          *  Freeing the fc's is the low level driver's responsibility.
 751          */
 752 }
 753
 754
 755 static void fcp_scsi_done(struct scsi_cmnd *SCpnt)
 756 {
 757         if (FCP_CMND(SCpnt)->done)
 758                 FCP_CMND(SCpnt)->done(SCpnt);
 759 }
 760
 761 static int fcp_scsi_queue_it(fc_channel *fc, struct scsi_cmnd *SCpnt,
 762                              fcp_cmnd *fcmd, int prepare)
 763 {
 764         long i;
 765         fcp_cmd *cmd;
 766         u32 fcp_cntl;
 767         if (prepare) {
 768                 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
 769                 set_bit (i, fc->scsi_bitmap);
 770                 fcmd->token = i;
 771                 cmd = fc->scsi_cmd_pool + i;
 772
 773                 if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) {
 774                         /* Invalid channel/id/lun and couldn't map it into fcp_addr */
 775                         clear_bit (i, fc->scsi_bitmap);
 776                         SCpnt->result = (DID_BAD_TARGET << 16);
 777                         SCpnt->scsi_done(SCpnt);
 778                         return 0;
 779                 }
 780                 fc->scsi_free--;
 781                 fc->cmd_slots[fcmd->token] = fcmd;
 782
 783                 if (SCpnt->device->tagged_supported) {
 784                         if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) {
 785                                 fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies;
 786                                 fcp_cntl = FCP_CNTL_QTYPE_ORDERED;
 787                         } else
 788                                 fcp_cntl = FCP_CNTL_QTYPE_SIMPLE;
 789                 } else
 790                         fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED;
 791
 792                 if (!scsi_bufflen(SCpnt)) {
 793                         cmd->fcp_cntl = fcp_cntl;
 794                         fcmd->data = (dma_addr_t)NULL;
 795                 } else {
 796                         struct scatterlist *sg;
 797                         int nents;
 798
 799                         switch (SCpnt->cmnd[0]) {
 800                         case WRITE_6:
 801                         case WRITE_10:
 802                         case WRITE_12:
 803                                 cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break;
 804                         default:
 805                                 cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break;
 806                         }
 807
 808                         sg = scsi_sglist(SCpnt);
 809                         nents = dma_map_sg(fc->dev, sg, scsi_sg_count(SCpnt),
 810                                            SCpnt->sc_data_direction);
 811                         fcmd->data = sg_dma_address(sg);
 812                         cmd->fcp_data_len = sg_dma_len(sg);
 813                 }
 814                 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
 815                 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
 816                 FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
 817         }
 818         FCD(("Trying to enque %p\n", fcmd))
 819         if (!fc->scsi_que) {
 820                 if (!fc->hw_enque (fc, fcmd)) {
 821                         FCD(("hw_enque succeeded for %p\n", fcmd))
 822                         return 0;
 823                 }
 824         }
 825         FCD(("Putting into que1 %p\n", fcmd))
 826         fcp_scsi_insert_queue (fc, fcmd);
 827         return 0;
 828 }
 829
 830 int fcp_scsi_queuecommand(struct scsi_cmnd *SCpnt,
 831                           void (* done)(struct scsi_cmnd *))
 832 {
 833         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
 834         fc_channel *fc = FC_SCMND(SCpnt);
 835
 836         FCD(("Entering SCSI queuecommand %p\n", fcmd))
 837         if (SCpnt->done != fcp_scsi_done) {
 838                 fcmd->done = SCpnt->done;
 839                 SCpnt->done = fcp_scsi_done;
 840                 SCpnt->scsi_done = done;
 841                 fcmd->proto = TYPE_SCSI_FCP;
 842                 if (!fc->scsi_free) {
 843                         FCD(("FC: !scsi_free, putting cmd on ML queue\n"))
 844 #if (FCP_SCSI_USE_NEW_EH_CODE == 0)
 845                         printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n");
 846 #endif
 847                         return 1;
 848                 }
 849                 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1);
 850         }
 851         return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0);
 852 }
 853
 854 void fcp_queue_empty(fc_channel *fc)
 855 {
 856         fcp_cmnd *fcmd;
 857
 858         FCD(("Queue empty\n"))
 859         while ((fcmd = fc->scsi_que)) {
 860                 /* The hw told us we can try again queue some packet */
 861                 if (fc->hw_enque (fc, fcmd))
 862                         break;
 863                 fcp_scsi_remove_queue (fc, fcmd);
 864         }
 865 }
 866
 867 int fcp_scsi_abort(struct scsi_cmnd *SCpnt)
 868 {
 869         /* Internal bookkeeping only. Lose 1 cmd_slots slot. */
 870         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
 871         fc_channel *fc = FC_SCMND(SCpnt);
 872
 873         /*
 874          * We react to abort requests by simply forgetting
 875          * about the command and pretending everything's sweet.
 876          * This may or may not be silly. We can't, however,
 877          * immediately reuse the command's cmd_slots slot,
 878          * as its result may arrive later and we cannot
 879          * check whether it is the aborted one, can't we?
 880          *
 881          * Therefore, after the first few aborts are done,
 882          * we tell the scsi error handler to do something clever.
 883          * It will eventually call host reset, refreshing
 884          * cmd_slots for us.
 885          *
 886          * There is a theoretical chance that we sometimes allow
 887          * more than can_queue packets to the jungle this way,
 888          * but the worst outcome possible is a series of
 889          * more aborts and eventually the dev_reset catharsis.
 890          */
 891
 892         if (++fc->abort_count < (fc->can_queue >> 1)) {
 893                 SCpnt->result = DID_ABORT;
 894                 fcmd->done(SCpnt);
 895                 printk("FC: soft abort\n");
 896                 return SUCCESS;
 897         } else {
 898                 printk("FC: hard abort refused\n");
 899                 return FAILED;
 900         }
 901 }
 902
 903 #if 0
 904 void fcp_scsi_reset_done(struct scsi_cmnd *SCpnt)
 905 {
 906         fc_channel *fc = FC_SCMND(SCpnt);
 907
 908         fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
 909         up(fc->rst_pkt->device->host->eh_action);
 910 }
 911 #endif
 912
 913 #define FCP_RESET_TIMEOUT (2*HZ)
 914
 915 int fcp_scsi_dev_reset(struct scsi_cmnd *SCpnt)
 916 {
 917 #if 0 /* broken junk, but if davem wants to compile this driver, let him.. */
 918         unsigned long flags;
 919         fcp_cmd *cmd;
 920         fcp_cmnd *fcmd;
 921         fc_channel *fc = FC_SCMND(SCpnt);
 922         DECLARE_MUTEX_LOCKED(sem);
 923
 924         if (!fc->rst_pkt) {
 925                 fc->rst_pkt = kmalloc(sizeof(SCpnt), GFP_KERNEL);
 926                 if (!fc->rst_pkt) return FAILED;
 927
 928                 fcmd = FCP_CMND(fc->rst_pkt);
 929
 930
 931                 fcmd->token = 0;
 932                 cmd = fc->scsi_cmd_pool + 0;
 933                 FCD(("Preparing rst packet\n"))
 934                 fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
 935                 fc->rst_pkt->device = SCpnt->device;
 936                 fc->rst_pkt->cmd_len = 0;
 937
 938                 fc->cmd_slots[0] = fcmd;
 939
 940                 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
 941                 fcmd->data = (dma_addr_t)NULL;
 942                 fcmd->proto = TYPE_SCSI_FCP;
 943
 944                 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
 945                 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
 946                 FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
 947         } else {
 948                 fcmd = FCP_CMND(fc->rst_pkt);
 949                 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
 950                         return FAILED; /* or SUCCESS. Only these */
 951         }
 952         fc->rst_pkt->done = NULL;
 953
 954
 955         fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
 956         init_timer(&fc->rst_pkt->eh_timeout);
 957         fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
 958         fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
 959         fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
 960
 961         add_timer(&fc->rst_pkt->eh_timeout);
 962
 963         /*
 964          * Set up the semaphore so we wait for the command to complete.
 965          */
 966
 967         fc->rst_pkt->device->host->eh_action = &sem;
 968
 969         fc->rst_pkt->done = fcp_scsi_reset_done;
 970
 971         spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
 972         fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
 973         spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
 974
 975         down(&sem);
 976
 977         fc->rst_pkt->device->host->eh_action = NULL;
 978         del_timer(&fc->rst_pkt->eh_timeout);
 979
 980         /*
 981          * See if timeout.  If so, tell the host to forget about it.
 982          * In other words, we don't want a callback any more.
 983          */
 984         if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
 985                 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
 986                 return FAILED;
 987         }
 988         fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
 989 #endif
 990         return SUCCESS;
 991 }
 992
 993 static int __fcp_scsi_host_reset(struct scsi_cmnd *SCpnt)
 994 {
 995         fc_channel *fc = FC_SCMND(SCpnt);
 996         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
 997         int i;
 998
 999         printk ("FC: host reset\n");
1000
1001         for (i=0; i < fc->can_queue; i++) {
1002                 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1003                         SCpnt->result = DID_RESET;
1004                         fcmd->done(SCpnt);
1005                         fc->cmd_slots[i] = NULL;
1006                 }
1007         }
1008         fc->reset(fc);
1009         fc->abort_count = 0;
1010         if (fcp_initialize(fc, 1)) return SUCCESS;
1011         else return FAILED;
1012 }
1013
1014 int fcp_scsi_host_reset(struct scsi_cmnd *SCpnt)
1015 {
1016         unsigned long flags;
1017         int rc;
1018
1019         spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
1020         rc = __fcp_scsi_host_reset(SCpnt);
1021         spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
1022
1023         return rc;
1024 }
1025
1026 static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1027 {
1028         long i;
1029
1030         i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1031         set_bit (i, fc->scsi_bitmap);
1032         fcmd->token = i;
1033         fc->scsi_free--;
1034         fc->cmd_slots[fcmd->token] = fcmd;
1035         return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1036 }
1037
1038 static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1039 {
1040         fcp_cmnd _fcmd, *fcmd;
1041         fc_hdr *fch;
1042         lse l;
1043         int i;
1044
1045         fcmd = &_fcmd;
1046         memset(fcmd, 0, sizeof(fcp_cmnd));
1047         FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1048         fch = &fcmd->fch;
1049         FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1050         FILL_FCHDR_SID(fch, fc->sid);
1051         FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1052         FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1053         FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1054         fch->param = 0;
1055         fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL);
1056         fcmd->rsp = fcmd->cmd + len;
1057         fcmd->cmdlen = len;
1058         fcmd->rsplen = len;
1059         fcmd->data = (dma_addr_t)NULL;
1060         fcmd->fc = fc;
1061         fcmd->class = FC_CLASS_SIMPLE;
1062         fcmd->proto = TYPE_EXTENDED_LS;
1063
1064         memset (&l, 0, sizeof(lse));
1065         l.magic = LSEMAGIC;
1066         init_MUTEX_LOCKED(&l.sem);
1067         l.timer.function = fcp_login_timeout;
1068         l.timer.data = (unsigned long)&l;
1069         l.status = FC_STATUS_TIMED_OUT;
1070         fcmd->ls = (void *)&l;
1071
1072         disable_irq(fc->irq);
1073         fcp_els_queue_it(fc, fcmd);
1074         enable_irq(fc->irq);
1075
1076         for (i = 0;;) {
1077                 l.timer.expires = jiffies + 5 * HZ;
1078                 add_timer(&l.timer);
1079                 down(&l.sem);
1080                 del_timer(&l.timer);
1081                 if (l.status != FC_STATUS_TIMED_OUT) break;
1082                 if (++i == 3) break;
1083                 disable_irq(fc->irq);
1084                 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1085                 enable_irq(fc->irq);
1086         }
1087
1088         clear_bit(fcmd->token, fc->scsi_bitmap);
1089         fc->scsi_free++;
1090         dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL);
1091         return l.status;
1092 }
1093
1094 int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1095 {
1096         logi *l;
1097         int status;
1098
1099         l = kzalloc(2 * sizeof(logi), GFP_KERNEL);
1100         if (!l) return -ENOMEM;
1101         l->code = LS_PLOGI;
1102         memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1103         memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1104         memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1105         memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1106         status = fc_do_els(fc, alpa, l, sizeof(logi));
1107         if (status == FC_STATUS_OK) {
1108                 if (l[1].code == LS_ACC) {
1109 #ifdef FCDEBUG
1110                         u32 *u = (u32 *)&l[1].nport_wwn;
1111                         FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1112                                 u[0], u[1], u[2], u[3]))
1113 #endif
1114                         memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1115                         memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1116                 } else
1117                         status = FC_STATUS_BAD_RSP;
1118         }
1119         kfree(l);
1120         return status;
1121 }
1122
1123 typedef struct {
1124         unsigned int code;
1125         unsigned params[4];
1126 } prli;
1127
1128 int fc_do_prli(fc_channel *fc, unsigned char alpa)
1129 {
1130         prli *p;
1131         int status;
1132
1133         p = kzalloc(2 * sizeof(prli), GFP_KERNEL);
1134         if (!p) return -ENOMEM;
1135         p->code = LS_PRLI;
1136         p->params[0] = 0x08002000;
1137         p->params[3] = 0x00000022;
1138         status = fc_do_els(fc, alpa, p, sizeof(prli));
1139         if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1140                 status = FC_STATUS_BAD_RSP;
1141         kfree(p);
1142         return status;
1143 }
1144
1145 MODULE_LICENSE("GPL");
1146