git.oblomov.eu Git - linux-2.6/blob - 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) ((Scsi_Cmnd *)((long)fcmnd - (long)&(((Scsi_Cmnd *)0)->SCp)))
  74
  75 static int fcp_scsi_queue_it(fc_channel *, 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 = (fcp_posmap *)kmalloc(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                                 memset(fc->posmap, 0, sizeof(fcp_posmap)+p->len);
 276                                 /* FIXME: This is where SOCAL transfers our AL-PA.
 277                                    Keep it here till we found out what other cards do... */
 278                                 fc->sid = (p->magic & 0xff);
 279                                 for (i = 0; i < p->len; i++)
 280                                         if (p->alpa[i] == fc->sid)
 281                                                 break;
 282                                 k = p->len;
 283                                 if (i == p->len)
 284                                         i = 0;
 285                                 else {
 286                                         p->len--;
 287                                         i++;
 288                                 }
 289                                 fc->posmap->len = p->len;
 290                                 for (j = 0; j < p->len; j++) {
 291                                         if (i == k) i = 0;
 292                                         fc->posmap->list[j] = p->alpa[i++];
 293                                 }
 294                                 fc->state = FC_STATE_ONLINE;
 295                         }
 296                 }
 297                 printk ("%s: ONLINE\n", fc->name);
 298                 if (atomic_dec_and_test (&l->todo))
 299                         up(&l->sem);
 300                 break;
 301         case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */
 302                 FCD(("SID %d DID %d\n", fc->sid, fc->did))
 303                 fcmd = l->fcmds + i;
 304                 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi),
 305                                  DMA_BIDIRECTIONAL);
 306                 fch = &fcmd->fch;
 307                 memset(l->logi + 3 * i, 0, 3 * sizeof(logi));
 308                 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
 309                 FILL_FCHDR_SID(fch, 0);
 310                 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
 311                 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
 312                 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
 313                 fch->param = 0;
 314                 l->logi [3 * i].code = LS_FLOGI;
 315                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
 316                                             DMA_BIDIRECTIONAL);
 317                 fcmd->rsp = fcmd->cmd + sizeof(logi);
 318                 fcmd->cmdlen = sizeof(logi);
 319                 fcmd->rsplen = sizeof(logi);
 320                 fcmd->data = (dma_addr_t)NULL;
 321                 fcmd->class = FC_CLASS_SIMPLE;
 322                 fcmd->proto = TYPE_EXTENDED_LS;
 323                 if (fc->hw_enque (fc, fcmd))
 324                         printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name);
 325                 break;
 326         case FC_STATUS_ERR_OFFLINE:
 327                 fc->state = FC_STATE_MAYBEOFFLINE;
 328                 FCD (("FC is offline %d\n", l->grace[i]))
 329                 break;
 330         default:
 331                 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
 332                 /* Do some sort of error recovery here */
 333                 break;
 334         }
 335 }
 336
 337 void fcp_register(fc_channel *fc, u8 type, int unregister)
 338 {
 339         int size, i;
 340         int slots = (fc->can_queue * 3) >> 1;
 341
 342         FCND(("Going to %sregister\n", unregister ? "un" : ""))
 343
 344         if (type == TYPE_SCSI_FCP) {
 345                 if (!unregister) {
 346                         fc->scsi_cmd_pool = (fcp_cmd *)
 347                                 dma_alloc_consistent (fc->dev,
 348                                                       slots * (sizeof (fcp_cmd) + fc->rsp_size),
 349                                                       &fc->dma_scsi_cmd);
 350                         fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots);
 351                         fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd);
 352                         fc->scsi_bitmap_end = (slots + 63) & ~63;
 353                         size = fc->scsi_bitmap_end / 8;
 354                         fc->scsi_bitmap = kmalloc (size, GFP_KERNEL);
 355                         memset (fc->scsi_bitmap, 0, size);
 356                         set_bit (0, fc->scsi_bitmap);
 357                         for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++)
 358                                 set_bit (i, fc->scsi_bitmap);
 359                         fc->scsi_free = fc->can_queue;
 360                         fc->cmd_slots = (fcp_cmnd **)kmalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);
 361                         memset(fc->cmd_slots, 0, slots * sizeof(fcp_cmnd*));
 362                         fc->abort_count = 0;
 363                 } else {
 364                         fc->scsi_name[0] = 0;
 365                         kfree (fc->scsi_bitmap);
 366                         kfree (fc->cmd_slots);
 367                         FCND(("Unregistering\n"));
 368                         if (fc->rst_pkt) {
 369                                 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
 370                                         kfree(fc->rst_pkt);
 371                                 else {
 372                                         /* Can't happen. Some memory would be lost. */
 373                                         printk("FC: Reset in progress. Now?!");
 374                                 }
 375                         }
 376                         FCND(("Unregistered\n"));
 377                 }
 378         } else
 379                 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
 380 }
 381
 382 static void fcp_scsi_done(Scsi_Cmnd *SCpnt);
 383
 384 static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
 385 {
 386         fcp_cmnd *fcmd;
 387         fcp_rsp  *rsp;
 388         int host_status;
 389         Scsi_Cmnd *SCpnt;
 390         int sense_len;
 391         int rsp_status;
 392
 393         fcmd = fc->cmd_slots[token];
 394         if (!fcmd) return;
 395         rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
 396         SCpnt = SC_FCMND(fcmd);
 397
 398         if (SCpnt->done != fcp_scsi_done)
 399                 return;
 400
 401         rsp_status = rsp->fcp_status;
 402         FCD(("rsp_status %08x status %08x\n", rsp_status, status))
 403         switch (status) {
 404         case FC_STATUS_OK:
 405                 host_status=DID_OK;
 406
 407                 if (rsp_status & FCP_STATUS_RESID) {
 408 #ifdef FCDEBUG
 409                         FCD(("Resid %d\n", rsp->fcp_resid))
 410                         {
 411                                 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
 412                                 int i;
 413
 414                                 printk ("Command ");
 415                                 for (i = 0; i < sizeof(fcp_cmd); i+=4)
 416                                         printk ("%08x ", *(u32 *)(((char *)cmd)+i));
 417                                 printk ("\nResponse ");
 418                                 for (i = 0; i < fc->rsp_size; i+=4)
 419                                         printk ("%08x ", *(u32 *)(((char *)rsp)+i));
 420                                 printk ("\n");
 421                         }
 422 #endif
 423                 }
 424
 425                 if (rsp_status & FCP_STATUS_SENSE_LEN) {
 426                         sense_len = rsp->fcp_sense_len;
 427                         if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
 428                         memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
 429                 }
 430
 431                 if (fcmd->data) {
 432                         if (SCpnt->use_sg)
 433                                 dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->buffer,
 434                                                 SCpnt->use_sg,
 435                                                 SCpnt->sc_data_direction);
 436                         else
 437                                 dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,
 438                                                  SCpnt->sc_data_direction);
 439                 }
 440                 break;
 441         default:
 442                 host_status=DID_ERROR; /* FIXME */
 443                 FCD(("Wrong FC status %d for token %d\n", status, token))
 444                 break;
 445         }
 446
 447         if (status_byte(rsp_status) == QUEUE_FULL) {
 448                 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status);
 449         }
 450
 451         SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
 452 #ifdef FCDEBUG
 453         if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
 454                         host_status, SCpnt->result);
 455 #endif
 456         SCpnt->done = fcmd->done;
 457         fcmd->done=NULL;
 458         clear_bit(token, fc->scsi_bitmap);
 459         fc->scsi_free++;
 460         FCD(("Calling scsi_done with %08x\n", SCpnt->result))
 461         SCpnt->scsi_done(SCpnt);
 462 }
 463
 464 void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
 465 {
 466         int magic;
 467         FCD(("receive_solicited %d %d %d\n", proto, token, status))
 468         switch (proto) {
 469         case TYPE_SCSI_FCP:
 470                 fcp_scsi_receive(fc, token, status, fch); break;
 471         case TYPE_EXTENDED_LS:
 472         case PROTO_REPORT_AL_MAP:
 473                 magic = 0;
 474                 if (fc->ls)
 475                         magic = ((ls *)(fc->ls))->magic;
 476                 if (magic == LSMAGIC) {
 477                         ls *l = (ls *)fc->ls;
 478                         int i = (token >= l->count) ? token - l->count : token;
 479
 480                         /* Let's be sure */
 481                         if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
 482                                 if (proto == TYPE_EXTENDED_LS)
 483                                         fcp_login_done(fc, token, status);
 484                                 else
 485                                         fcp_report_map_done(fc, token, status);
 486                                 break;
 487                         }
 488                 }
 489                 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
 490                 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
 491                         fcp_cmnd *fcmd;
 492
 493                         fcmd = fc->cmd_slots[token];
 494                         if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
 495                                 lse *l = (lse *)fcmd->ls;
 496
 497                                 l->status = status;
 498                                 up (&l->sem);
 499                         }
 500                 }
 501                 break;
 502         case PROTO_OFFLINE:
 503                 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
 504                         lso *l = (lso *)fc->ls;
 505
 506                         if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
 507                                 /* Wow, OFFLINE response arrived :) */
 508                                 FCD(("OFFLINE Response arrived\n"))
 509                                 fc->state = FC_STATE_OFFLINE;
 510                                 if (atomic_dec_and_test (&l->todo))
 511                                         up(&l->sem);
 512                         }
 513                 }
 514                 break;
 515
 516         default:
 517                 break;
 518         }
 519 }
 520
 521 void fcp_state_change(fc_channel *fc, int state)
 522 {
 523         FCD(("state_change %d %d\n", state, fc->state))
 524         if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
 525                 fc->state = FC_STATE_UNINITED;
 526         else if (state == FC_STATE_ONLINE)
 527                 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
 528         else
 529                 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
 530 }
 531
 532 int fcp_initialize(fc_channel *fcchain, int count)
 533 {
 534         fc_channel *fc;
 535         fcp_cmnd *fcmd;
 536         int i, retry, ret;
 537         ls *l;
 538
 539         FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
 540         FCND(("fc_channels %08lx\n", (long)fc_channels))
 541         FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
 542         l = kmalloc(sizeof (ls) + count, GFP_KERNEL);
 543         if (!l) {
 544                 printk ("FC: Cannot allocate memory for initialization\n");
 545                 return -ENOMEM;
 546         }
 547         memset (l, 0, sizeof(ls) + count);
 548         l->magic = LSMAGIC;
 549         l->count = count;
 550         FCND(("FCP Init for %d channels\n", count))
 551         init_MUTEX_LOCKED(&l->sem);
 552         init_timer(&l->timer);
 553         l->timer.function = fcp_login_timeout;
 554         l->timer.data = (unsigned long)l;
 555         atomic_set (&l->todo, count);
 556         l->logi = kmalloc (count * 3 * sizeof(logi), GFP_KERNEL);
 557         l->fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
 558         if (!l->logi || !l->fcmds) {
 559                 if (l->logi) kfree (l->logi);
 560                 if (l->fcmds) kfree (l->fcmds);
 561                 kfree (l);
 562                 printk ("FC: Cannot allocate DMA memory for initialization\n");
 563                 return -ENOMEM;
 564         }
 565         memset (l->logi, 0, count * 3 * sizeof(logi));
 566         memset (l->fcmds, 0, count * sizeof(fcp_cmnd));
 567         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 568                 fc->state = FC_STATE_UNINITED;
 569                 fc->rst_pkt = NULL;     /* kmalloc when first used */
 570         }
 571         /* First try if we are in a AL topology */
 572         FCND(("Initializing REPORT_MAP packets\n"))
 573         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 574                 fcmd = l->fcmds + i;
 575                 fc->login = fcmd;
 576                 fc->ls = (void *)l;
 577                 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
 578                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
 579                                             DMA_BIDIRECTIONAL);
 580                 fcmd->proto = PROTO_REPORT_AL_MAP;
 581                 fcmd->token = i;
 582                 fcmd->fc = fc;
 583         }
 584         for (retry = 0; retry < 8; retry++) {
 585                 int nqueued = 0;
 586                 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
 587                 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 588                         if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
 589                                 continue;
 590                         disable_irq(fc->irq);
 591                         if (fc->state == FC_STATE_MAYBEOFFLINE) {
 592                                 if (!l->grace[i]) {
 593                                         l->grace[i]++;
 594                                         FCD(("Grace\n"))
 595                                 } else {
 596                                         fc->state = FC_STATE_OFFLINE;
 597                                         enable_irq(fc->irq);
 598                                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 599                                         if (atomic_dec_and_test (&l->todo))
 600                                                 goto all_done;
 601                                 }
 602                         }
 603                         ret = fc->hw_enque (fc, fc->login);
 604                         enable_irq(fc->irq);
 605                         if (!ret) {
 606                                 nqueued++;
 607                                 continue;
 608                         }
 609                         if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
 610                                 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
 611                                 fc_hdr *fch;
 612
 613                                 FCD(("SID %d DID %d\n", fc->sid, fc->did))
 614                                 fcmd = l->fcmds + i;
 615                                 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 616                                 fch = &fcmd->fch;
 617                                 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
 618                                 FILL_FCHDR_SID(fch, 0);
 619                                 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
 620                                 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
 621                                 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
 622                                 fch->param = 0;
 623                                 l->logi [3 * i].code = LS_FLOGI;
 624                                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 625                                 fcmd->rsp = fcmd->cmd + sizeof(logi);
 626                                 fcmd->cmdlen = sizeof(logi);
 627                                 fcmd->rsplen = sizeof(logi);
 628                                 fcmd->data = (dma_addr_t)NULL;
 629                                 fcmd->class = FC_CLASS_SIMPLE;
 630                                 fcmd->proto = TYPE_EXTENDED_LS;
 631                         } else
 632                                 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
 633                 }
 634
 635                 if (nqueued) {
 636                         l->timer.expires = jiffies + 5 * HZ;
 637                         add_timer(&l->timer);
 638
 639                         down(&l->sem);
 640                         if (!atomic_read(&l->todo)) {
 641                                 FCND(("All channels answered in time\n"))
 642                                 break; /* All fc channels have answered us */
 643                         }
 644                 }
 645         }
 646 all_done:
 647         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 648                 fc->ls = NULL;
 649                 switch (fc->state) {
 650                 case FC_STATE_ONLINE: break;
 651                 case FC_STATE_OFFLINE: break;
 652                 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
 653                         break;
 654                 }
 655         }
 656         del_timer(&l->timer);
 657         kfree (l->logi);
 658         kfree (l->fcmds);
 659         kfree (l);
 660         return 0;
 661 }
 662
 663 int fcp_forceoffline(fc_channel *fcchain, int count)
 664 {
 665         fc_channel *fc;
 666         fcp_cmnd *fcmd;
 667         int i, ret;
 668         lso l;
 669
 670         memset (&l, 0, sizeof(lso));
 671         l.count = count;
 672         l.magic = LSOMAGIC;
 673         FCND(("FCP Force Offline for %d channels\n", count))
 674         init_MUTEX_LOCKED(&l.sem);
 675         init_timer(&l.timer);
 676         l.timer.function = fcp_login_timeout;
 677         l.timer.data = (unsigned long)&l;
 678         atomic_set (&l.todo, count);
 679         l.fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
 680         if (!l.fcmds) {
 681                 kfree (l.fcmds);
 682                 printk ("FC: Cannot allocate memory for forcing offline\n");
 683                 return -ENOMEM;
 684         }
 685         memset (l.fcmds, 0, count * sizeof(fcp_cmnd));
 686         FCND(("Initializing OFFLINE packets\n"))
 687         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 688                 fc->state = FC_STATE_UNINITED;
 689                 fcmd = l.fcmds + i;
 690                 fc->login = fcmd;
 691                 fc->ls = (void *)&l;
 692                 fcmd->did = fc->did;
 693                 fcmd->class = FC_CLASS_OFFLINE;
 694                 fcmd->proto = PROTO_OFFLINE;
 695                 fcmd->token = i;
 696                 fcmd->fc = fc;
 697                 disable_irq(fc->irq);
 698                 ret = fc->hw_enque (fc, fc->login);
 699                 enable_irq(fc->irq);
 700                 if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
 701         }
 702
 703         l.timer.expires = jiffies + 5 * HZ;
 704         add_timer(&l.timer);
 705         down(&l.sem);
 706         del_timer(&l.timer);
 707
 708         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
 709                 fc->ls = NULL;
 710         kfree (l.fcmds);
 711         return 0;
 712 }
 713
 714 int fcp_init(fc_channel *fcchain)
 715 {
 716         fc_channel *fc;
 717         int count=0;
 718         int ret;
 719
 720         for (fc = fcchain; fc; fc = fc->next) {
 721                 fc->fcp_register = fcp_register;
 722                 count++;
 723         }
 724
 725         ret = fcp_initialize (fcchain, count);
 726         if (ret)
 727                 return ret;
 728
 729         if (!fc_channels)
 730                 fc_channels = fcchain;
 731         else {
 732                 for (fc = fc_channels; fc->next; fc = fc->next);
 733                 fc->next = fcchain;
 734         }
 735         return ret;
 736 }
 737
 738 void fcp_release(fc_channel *fcchain, int count)  /* count must > 0 */
 739 {
 740         fc_channel *fc;
 741         fc_channel *fcx;
 742
 743         for (fc = fcchain; --count && fc->next; fc = fc->next);
 744         if (count) {
 745                 printk("FC: nothing to release\n");
 746                 return;
 747         }
 748
 749         if (fc_channels == fcchain)
 750                 fc_channels = fc->next;
 751         else {
 752                 for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
 753                 fcx->next = fc->next;
 754         }
 755         fc->next = NULL;
 756
 757         /*
 758          *  We've just grabbed fcchain out of the fc_channel list
 759          *  and zero-terminated it, while destroying the count.
 760          *
 761          *  Freeing the fc's is the low level driver's responsibility.
 762          */
 763 }
 764
 765
 766 static void fcp_scsi_done (Scsi_Cmnd *SCpnt)
 767 {
 768         unsigned long flags;
 769
 770         if (FCP_CMND(SCpnt)->done)
 771                 FCP_CMND(SCpnt)->done(SCpnt);
 772 }
 773
 774 static int fcp_scsi_queue_it(fc_channel *fc, Scsi_Cmnd *SCpnt, fcp_cmnd *fcmd, int prepare)
 775 {
 776         long i;
 777         fcp_cmd *cmd;
 778         u32 fcp_cntl;
 779         if (prepare) {
 780                 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
 781                 set_bit (i, fc->scsi_bitmap);
 782                 fcmd->token = i;
 783                 cmd = fc->scsi_cmd_pool + i;
 784
 785                 if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) {
 786                         /* Invalid channel/id/lun and couldn't map it into fcp_addr */
 787                         clear_bit (i, fc->scsi_bitmap);
 788                         SCpnt->result = (DID_BAD_TARGET << 16);
 789                         SCpnt->scsi_done(SCpnt);
 790                         return 0;
 791                 }
 792                 fc->scsi_free--;
 793                 fc->cmd_slots[fcmd->token] = fcmd;
 794
 795                 if (SCpnt->device->tagged_supported) {
 796                         if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) {
 797                                 fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies;
 798                                 fcp_cntl = FCP_CNTL_QTYPE_ORDERED;
 799                         } else
 800                                 fcp_cntl = FCP_CNTL_QTYPE_SIMPLE;
 801                 } else
 802                         fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED;
 803                 if (!SCpnt->request_bufflen && !SCpnt->use_sg) {
 804                         cmd->fcp_cntl = fcp_cntl;
 805                         fcmd->data = (dma_addr_t)NULL;
 806                 } else {
 807                         switch (SCpnt->cmnd[0]) {
 808                         case WRITE_6:
 809                         case WRITE_10:
 810                         case WRITE_12:
 811                                 cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break;
 812                         default:
 813                                 cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break;
 814                         }
 815                         if (!SCpnt->use_sg) {
 816                                 cmd->fcp_data_len = SCpnt->request_bufflen;
 817                                 fcmd->data = dma_map_single (fc->dev, (char *)SCpnt->request_buffer,
 818                                                              SCpnt->request_bufflen,
 819                                                              SCpnt->sc_data_direction);
 820                         } else {
 821                                 struct scatterlist *sg = (struct scatterlist *)SCpnt->buffer;
 822                                 int nents;
 823
 824                                 FCD(("XXX: Use_sg %d %d\n", SCpnt->use_sg, sg->length))
 825                                 nents = dma_map_sg (fc->dev, sg, SCpnt->use_sg,
 826                                                     SCpnt->sc_data_direction);
 827                                 if (nents > 1) printk ("%s: SG for nents %d (use_sg %d) not handled yet\n", fc->name, nents, SCpnt->use_sg);
 828                                 fcmd->data = sg_dma_address(sg);
 829                                 cmd->fcp_data_len = sg_dma_len(sg);
 830                         }
 831                 }
 832                 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
 833                 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
 834                 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)))
 835         }
 836         FCD(("Trying to enque %p\n", fcmd))
 837         if (!fc->scsi_que) {
 838                 if (!fc->hw_enque (fc, fcmd)) {
 839                         FCD(("hw_enque succeeded for %p\n", fcmd))
 840                         return 0;
 841                 }
 842         }
 843         FCD(("Putting into que1 %p\n", fcmd))
 844         fcp_scsi_insert_queue (fc, fcmd);
 845         return 0;
 846 }
 847
 848 int fcp_scsi_queuecommand(Scsi_Cmnd *SCpnt, void (* done)(Scsi_Cmnd *))
 849 {
 850         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
 851         fc_channel *fc = FC_SCMND(SCpnt);
 852
 853         FCD(("Entering SCSI queuecommand %p\n", fcmd))
 854         if (SCpnt->done != fcp_scsi_done) {
 855                 fcmd->done = SCpnt->done;
 856                 SCpnt->done = fcp_scsi_done;
 857                 SCpnt->scsi_done = done;
 858                 fcmd->proto = TYPE_SCSI_FCP;
 859                 if (!fc->scsi_free) {
 860                         FCD(("FC: !scsi_free, putting cmd on ML queue\n"))
 861 #if (FCP_SCSI_USE_NEW_EH_CODE == 0)
 862                         printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n");
 863 #endif
 864                         return 1;
 865                 }
 866                 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1);
 867         }
 868         return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0);
 869 }
 870
 871 void fcp_queue_empty(fc_channel *fc)
 872 {
 873         fcp_cmnd *fcmd;
 874
 875         FCD(("Queue empty\n"))
 876         while ((fcmd = fc->scsi_que)) {
 877                 /* The hw told us we can try again queue some packet */
 878                 if (fc->hw_enque (fc, fcmd))
 879                         break;
 880                 fcp_scsi_remove_queue (fc, fcmd);
 881         }
 882 }
 883
 884 int fcp_scsi_abort(Scsi_Cmnd *SCpnt)
 885 {
 886         /* Internal bookkeeping only. Lose 1 cmd_slots slot. */
 887         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
 888         fc_channel *fc = FC_SCMND(SCpnt);
 889
 890         /*
 891          * We react to abort requests by simply forgetting
 892          * about the command and pretending everything's sweet.
 893          * This may or may not be silly. We can't, however,
 894          * immediately reuse the command's cmd_slots slot,
 895          * as its result may arrive later and we cannot
 896          * check whether it is the aborted one, can't we?
 897          *
 898          * Therefore, after the first few aborts are done,
 899          * we tell the scsi error handler to do something clever.
 900          * It will eventually call host reset, refreshing
 901          * cmd_slots for us.
 902          *
 903          * There is a theoretical chance that we sometimes allow
 904          * more than can_queue packets to the jungle this way,
 905          * but the worst outcome possible is a series of
 906          * more aborts and eventually the dev_reset catharsis.
 907          */
 908
 909         if (++fc->abort_count < (fc->can_queue >> 1)) {
 910                 unsigned long flags;
 911
 912                 SCpnt->result = DID_ABORT;
 913                 fcmd->done(SCpnt);
 914                 printk("FC: soft abort\n");
 915                 return SUCCESS;
 916         } else {
 917                 printk("FC: hard abort refused\n");
 918                 return FAILED;
 919         }
 920 }
 921
 922 void fcp_scsi_reset_done(Scsi_Cmnd *SCpnt)
 923 {
 924         fc_channel *fc = FC_SCMND(SCpnt);
 925
 926         fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
 927         up(fc->rst_pkt->device->host->eh_action);
 928 }
 929
 930 #define FCP_RESET_TIMEOUT (2*HZ)
 931
 932 int fcp_scsi_dev_reset(Scsi_Cmnd *SCpnt)
 933 {
 934         fcp_cmd *cmd;
 935         fcp_cmnd *fcmd;
 936         fc_channel *fc = FC_SCMND(SCpnt);
 937         DECLARE_MUTEX_LOCKED(sem);
 938
 939         if (!fc->rst_pkt) {
 940                 fc->rst_pkt = (Scsi_Cmnd *) kmalloc(sizeof(SCpnt), GFP_KERNEL);
 941                 if (!fc->rst_pkt) return FAILED;
 942
 943                 fcmd = FCP_CMND(fc->rst_pkt);
 944
 945
 946                 fcmd->token = 0;
 947                 cmd = fc->scsi_cmd_pool + 0;
 948                 FCD(("Preparing rst packet\n"))
 949                 fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
 950                 fc->rst_pkt->device = SCpnt->device;
 951                 fc->rst_pkt->cmd_len = 0;
 952
 953                 fc->cmd_slots[0] = fcmd;
 954
 955                 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
 956                 fcmd->data = (dma_addr_t)NULL;
 957                 fcmd->proto = TYPE_SCSI_FCP;
 958
 959                 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
 960                 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
 961                 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)))
 962         } else {
 963                 fcmd = FCP_CMND(fc->rst_pkt);
 964                 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
 965                         return FAILED; /* or SUCCESS. Only these */
 966         }
 967         fc->rst_pkt->done = NULL;
 968
 969
 970         fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
 971         init_timer(&fc->rst_pkt->eh_timeout);
 972         fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
 973         fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
 974         fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
 975
 976         add_timer(&fc->rst_pkt->eh_timeout);
 977
 978         /*
 979          * Set up the semaphore so we wait for the command to complete.
 980          */
 981
 982         fc->rst_pkt->device->host->eh_action = &sem;
 983         fc->rst_pkt->request->rq_status = RQ_SCSI_BUSY;
 984
 985         fc->rst_pkt->done = fcp_scsi_reset_done;
 986
 987         spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
 988         fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
 989         spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
 990
 991         down(&sem);
 992
 993         fc->rst_pkt->device->host->eh_action = NULL;
 994         del_timer(&fc->rst_pkt->eh_timeout);
 995
 996         /*
 997          * See if timeout.  If so, tell the host to forget about it.
 998          * In other words, we don't want a callback any more.
 999          */
1000         if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
1001                 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1002                 return FAILED;
1003         }
1004         fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1005         return SUCCESS;
1006 }
1007
1008 static int __fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1009 {
1010         fc_channel *fc = FC_SCMND(SCpnt);
1011         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
1012         int i;
1013
1014         printk ("FC: host reset\n");
1015
1016         for (i=0; i < fc->can_queue; i++) {
1017                 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1018                         SCpnt->result = DID_RESET;
1019                         fcmd->done(SCpnt);
1020                         fc->cmd_slots[i] = NULL;
1021                 }
1022         }
1023         fc->reset(fc);
1024         fc->abort_count = 0;
1025         if (fcp_initialize(fc, 1)) return SUCCESS;
1026         else return FAILED;
1027 }
1028
1029 int fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1030 {
1031         int rc;
1032
1033         spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
1034         rc = __fcp_scsi_host_reset(SCpnt);
1035         spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
1036
1037         return rc;
1038 }
1039
1040 static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1041 {
1042         long i;
1043
1044         i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1045         set_bit (i, fc->scsi_bitmap);
1046         fcmd->token = i;
1047         fc->scsi_free--;
1048         fc->cmd_slots[fcmd->token] = fcmd;
1049         return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1050 }
1051
1052 static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1053 {
1054         fcp_cmnd _fcmd, *fcmd;
1055         fc_hdr *fch;
1056         lse l;
1057         int i;
1058
1059         fcmd = &_fcmd;
1060         memset(fcmd, 0, sizeof(fcmd));
1061         FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1062         fch = &fcmd->fch;
1063         FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1064         FILL_FCHDR_SID(fch, fc->sid);
1065         FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1066         FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1067         FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1068         fch->param = 0;
1069         fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL);
1070         fcmd->rsp = fcmd->cmd + len;
1071         fcmd->cmdlen = len;
1072         fcmd->rsplen = len;
1073         fcmd->data = (dma_addr_t)NULL;
1074         fcmd->fc = fc;
1075         fcmd->class = FC_CLASS_SIMPLE;
1076         fcmd->proto = TYPE_EXTENDED_LS;
1077
1078         memset (&l, 0, sizeof(lse));
1079         l.magic = LSEMAGIC;
1080         init_MUTEX_LOCKED(&l.sem);
1081         l.timer.function = fcp_login_timeout;
1082         l.timer.data = (unsigned long)&l;
1083         l.status = FC_STATUS_TIMED_OUT;
1084         fcmd->ls = (void *)&l;
1085
1086         disable_irq(fc->irq);
1087         fcp_els_queue_it(fc, fcmd);
1088         enable_irq(fc->irq);
1089
1090         for (i = 0;;) {
1091                 l.timer.expires = jiffies + 5 * HZ;
1092                 add_timer(&l.timer);
1093                 down(&l.sem);
1094                 del_timer(&l.timer);
1095                 if (l.status != FC_STATUS_TIMED_OUT) break;
1096                 if (++i == 3) break;
1097                 disable_irq(fc->irq);
1098                 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1099                 enable_irq(fc->irq);
1100         }
1101
1102         clear_bit(fcmd->token, fc->scsi_bitmap);
1103         fc->scsi_free++;
1104         dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL);
1105         return l.status;
1106 }
1107
1108 int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1109 {
1110         logi *l;
1111         int status;
1112
1113         l = (logi *)kmalloc(2 * sizeof(logi), GFP_KERNEL);
1114         if (!l) return -ENOMEM;
1115         memset(l, 0, 2 * sizeof(logi));
1116         l->code = LS_PLOGI;
1117         memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1118         memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1119         memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1120         memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1121         status = fc_do_els(fc, alpa, l, sizeof(logi));
1122         if (status == FC_STATUS_OK) {
1123                 if (l[1].code == LS_ACC) {
1124 #ifdef FCDEBUG
1125                         u32 *u = (u32 *)&l[1].nport_wwn;
1126                         FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1127                                 u[0], u[1], u[2], u[3]))
1128 #endif
1129                         memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1130                         memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1131                 } else
1132                         status = FC_STATUS_BAD_RSP;
1133         }
1134         kfree(l);
1135         return status;
1136 }
1137
1138 typedef struct {
1139         unsigned int code;
1140         unsigned params[4];
1141 } prli;
1142
1143 int fc_do_prli(fc_channel *fc, unsigned char alpa)
1144 {
1145         prli *p;
1146         int status;
1147
1148         p = (prli *)kmalloc(2 * sizeof(prli), GFP_KERNEL);
1149         if (!p) return -ENOMEM;
1150         memset(p, 0, 2 * sizeof(prli));
1151         p->code = LS_PRLI;
1152         p->params[0] = 0x08002000;
1153         p->params[3] = 0x00000022;
1154         status = fc_do_els(fc, alpa, p, sizeof(prli));
1155         if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1156                 status = FC_STATUS_BAD_RSP;
1157         kfree(p);
1158         return status;
1159 }
1160
1161 MODULE_LICENSE("GPL");
1162