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/sched.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 #include <linux/blk.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/irq.h>
  40 #include <asm/semaphore.h>
  41 #include "fcp_impl.h"
  42 #include "../scsi/hosts.h"
  43
  44 /* #define FCDEBUG */
  45
  46 #define fc_printk printk ("%s: ", fc->name); printk
  47
  48 #ifdef FCDEBUG
  49 #define FCD(x)  fc_printk x;
  50 #define FCND(x) printk ("FC: "); printk x;
  51 #else
  52 #define FCD(x)
  53 #define FCND(x)
  54 #endif
  55
  56 #ifdef __sparc__
  57 #define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p)
  58 #define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h)
  59 #define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir)
  60 #define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir)
  61 #define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir)
  62 #define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir)
  63 #define scsi_to_fc_dma_dir(dir) scsi_to_sbus_dma_dir(dir)
  64 #define FC_DMA_BIDIRECTIONAL    SBUS_DMA_BIDIRECTIONAL
  65 #else
  66 #define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p)
  67 #define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h)
  68 #define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir)
  69 #define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir)
  70 #define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir)
  71 #define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir)
  72 #define scsi_to_fc_dma_dir(dir) scsi_to_pci_dma_dir(dir)
  73 #define FC_DMA_BIDIRECTIONAL    PCI_DMA_BIDIRECTIONAL
  74 #endif
  75
  76 #define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp))
  77 #define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->host->hostdata[0]))
  78 #define SC_FCMND(fcmnd) ((Scsi_Cmnd *)((long)fcmnd - (long)&(((Scsi_Cmnd *)0)->SCp)))
  79
  80 static int fcp_scsi_queue_it(fc_channel *, Scsi_Cmnd *, fcp_cmnd *, int);
  81 void fcp_queue_empty(fc_channel *);
  82
  83 static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd)
  84 {
  85         if (!fc->scsi_que) {
  86                 fc->scsi_que = fcmd;
  87                 fcmd->next = fcmd;
  88                 fcmd->prev = fcmd;
  89         } else {
  90                 fc->scsi_que->prev->next = fcmd;
  91                 fcmd->prev = fc->scsi_que->prev;
  92                 fc->scsi_que->prev = fcmd;
  93                 fcmd->next = fc->scsi_que;
  94         }
  95 }
  96
  97 static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd)
  98 {
  99         if (fcmd == fcmd->next) {
 100                 fc->scsi_que = NULL;
 101                 return;
 102         }
 103         if (fcmd == fc->scsi_que)
 104                 fc->scsi_que = fcmd->next;
 105         fcmd->prev->next = fcmd->next;
 106         fcmd->next->prev = fcmd->prev;
 107 }
 108
 109 fc_channel *fc_channels = NULL;
 110
 111 #define LSMAGIC 620829043
 112 typedef struct {
 113         /* Must be first */
 114         struct semaphore sem;
 115         int magic;
 116         int count;
 117         logi *logi;
 118         fcp_cmnd *fcmds;
 119         atomic_t todo;
 120         struct timer_list timer;
 121         unsigned char grace[0];
 122 } ls;
 123
 124 #define LSOMAGIC 654907799
 125 typedef struct {
 126         /* Must be first */
 127         struct semaphore sem;
 128         int magic;
 129         int count;
 130         fcp_cmnd *fcmds;
 131         atomic_t todo;
 132         struct timer_list timer;
 133 } lso;
 134
 135 #define LSEMAGIC 84482456
 136 typedef struct {
 137         /* Must be first */
 138         struct semaphore sem;
 139         int magic;
 140         int status;
 141         struct timer_list timer;
 142 } lse;
 143
 144 static void fcp_login_timeout(unsigned long data)
 145 {
 146         ls *l = (ls *)data;
 147         FCND(("Login timeout\n"))
 148         up(&l->sem);
 149 }
 150
 151 static void fcp_login_done(fc_channel *fc, int i, int status)
 152 {
 153         fcp_cmnd *fcmd;
 154         logi *plogi;
 155         fc_hdr *fch;
 156         ls *l = (ls *)fc->ls;
 157
 158         FCD(("Login done %d %d\n", i, status))
 159         if (i < l->count) {
 160                 if (fc->state == FC_STATE_FPORT_OK) {
 161                         FCD(("Additional FPORT_OK received with status %d\n", status))
 162                         return;
 163                 }
 164                 switch (status) {
 165                 case FC_STATUS_OK: /* Oh, we found a fabric */
 166                 case FC_STATUS_P_RJT: /* Oh, we haven't found any */
 167                         fc->state = FC_STATE_FPORT_OK;
 168                         fcmd = l->fcmds + i;
 169                         plogi = l->logi + 3 * i;
 170                         dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi),
 171                                           FC_DMA_BIDIRECTIONAL);
 172                         plogi->code = LS_PLOGI;
 173                         memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
 174                         memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
 175                         memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm));
 176                         memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm));
 177                         fch = &fcmd->fch;
 178                         fcmd->token += l->count;
 179                         FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did);
 180                         FILL_FCHDR_SID(fch, fc->sid);
 181 #ifdef FCDEBUG
 182                         {
 183                                 int i;
 184                                 unsigned *x = (unsigned *)plogi;
 185                                 printk ("logi: ");
 186                                 for (i = 0; i < 21; i++)
 187                                         printk ("%08x ", x[i]);
 188                                 printk ("\n");
 189                         }
 190 #endif
 191                         fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi),
 192                                                     FC_DMA_BIDIRECTIONAL);
 193                         fcmd->rsp = fcmd->cmd + 2 * sizeof(logi);
 194                         if (fc->hw_enque (fc, fcmd))
 195                                 printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name);
 196                         break;
 197                 case FC_STATUS_ERR_OFFLINE:
 198                         fc->state = FC_STATE_MAYBEOFFLINE;
 199                         FCD (("FC is offline %d\n", l->grace[i]))
 200                         break;
 201                 default:
 202                         printk ("FLOGI failed for %s with status %d\n", fc->name, status);
 203                         /* Do some sort of error recovery here */
 204                         break;
 205                 }
 206         } else {
 207                 i -= l->count;
 208                 if (fc->state != FC_STATE_FPORT_OK) {
 209                         FCD(("Unexpected N-PORT rsp received"))
 210                         return;
 211                 }
 212                 switch (status) {
 213                 case FC_STATUS_OK:
 214                         plogi = l->logi + 3 * i;
 215                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
 216                                           FC_DMA_BIDIRECTIONAL);
 217                         if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) {
 218                                 memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn));
 219                                 FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo))
 220                         } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo ||
 221                                    fc->wwn_dest.hi != plogi[1].node_wwn.hi) {
 222                                 printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n",
 223                                         fc->name,
 224                                         *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo,
 225                                         *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo);
 226                         }
 227                         fc->state = FC_STATE_ONLINE;
 228                         printk ("%s: ONLINE\n", fc->name);
 229                         if (atomic_dec_and_test (&l->todo))
 230                                 up(&l->sem);
 231                         break;
 232                 case FC_STATUS_ERR_OFFLINE:
 233                         fc->state = FC_STATE_OFFLINE;
 234                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
 235                                           FC_DMA_BIDIRECTIONAL);
 236                         printk ("%s: FC is offline\n", fc->name);
 237                         if (atomic_dec_and_test (&l->todo))
 238                                 up(&l->sem);
 239                         break;
 240                 default:
 241                         printk ("PLOGI failed for %s with status %d\n", fc->name, status);
 242                         /* Do some sort of error recovery here */
 243                         break;
 244                 }
 245         }
 246 }
 247
 248 static void fcp_report_map_done(fc_channel *fc, int i, int status)
 249 {
 250         fcp_cmnd *fcmd;
 251         fc_hdr *fch;
 252         unsigned char j;
 253         ls *l = (ls *)fc->ls;
 254         fc_al_posmap *p;
 255
 256         FCD(("Report map done %d %d\n", i, status))
 257         switch (status) {
 258         case FC_STATUS_OK: /* Ok, let's have a fun on a loop */
 259                 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
 260                                   FC_DMA_BIDIRECTIONAL);
 261                 p = (fc_al_posmap *)(l->logi + 3 * i);
 262 #ifdef FCDEBUG
 263                 {
 264                 u32 *u = (u32 *)p;
 265                 FCD(("%08x\n", u[0]))
 266                 u ++;
 267                 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]))
 268                 }
 269 #endif
 270                 if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) {
 271                         printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic);
 272                         fc->state = FC_STATE_OFFLINE;
 273                 } else {
 274                         fc->posmap = (fcp_posmap *)kmalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL);
 275                         if (!fc->posmap) {
 276                                 printk("FC: Not enough memory, offlining channel\n");
 277                                 fc->state = FC_STATE_OFFLINE;
 278                         } else {
 279                                 int k;
 280                                 memset(fc->posmap, 0, sizeof(fcp_posmap)+p->len);
 281                                 /* FIXME: This is where SOCAL transfers our AL-PA.
 282                                    Keep it here till we found out what other cards do... */
 283                                 fc->sid = (p->magic & 0xff);
 284                                 for (i = 0; i < p->len; i++)
 285                                         if (p->alpa[i] == fc->sid)
 286                                                 break;
 287                                 k = p->len;
 288                                 if (i == p->len)
 289                                         i = 0;
 290                                 else {
 291                                         p->len--;
 292                                         i++;
 293                                 }
 294                                 fc->posmap->len = p->len;
 295                                 for (j = 0; j < p->len; j++) {
 296                                         if (i == k) i = 0;
 297                                         fc->posmap->list[j] = p->alpa[i++];
 298                                 }
 299                                 fc->state = FC_STATE_ONLINE;
 300                         }
 301                 }
 302                 printk ("%s: ONLINE\n", fc->name);
 303                 if (atomic_dec_and_test (&l->todo))
 304                         up(&l->sem);
 305                 break;
 306         case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */
 307                 FCD(("SID %d DID %d\n", fc->sid, fc->did))
 308                 fcmd = l->fcmds + i;
 309                 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi),
 310                                  FC_DMA_BIDIRECTIONAL);
 311                 fch = &fcmd->fch;
 312                 memset(l->logi + 3 * i, 0, 3 * sizeof(logi));
 313                 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
 314                 FILL_FCHDR_SID(fch, 0);
 315                 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
 316                 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
 317                 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
 318                 fch->param = 0;
 319                 l->logi [3 * i].code = LS_FLOGI;
 320                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
 321                                             FC_DMA_BIDIRECTIONAL);
 322                 fcmd->rsp = fcmd->cmd + sizeof(logi);
 323                 fcmd->cmdlen = sizeof(logi);
 324                 fcmd->rsplen = sizeof(logi);
 325                 fcmd->data = (dma_addr_t)NULL;
 326                 fcmd->class = FC_CLASS_SIMPLE;
 327                 fcmd->proto = TYPE_EXTENDED_LS;
 328                 if (fc->hw_enque (fc, fcmd))
 329                         printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name);
 330                 break;
 331         case FC_STATUS_ERR_OFFLINE:
 332                 fc->state = FC_STATE_MAYBEOFFLINE;
 333                 FCD (("FC is offline %d\n", l->grace[i]))
 334                 break;
 335         default:
 336                 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
 337                 /* Do some sort of error recovery here */
 338                 break;
 339         }
 340 }
 341
 342 void fcp_register(fc_channel *fc, u8 type, int unregister)
 343 {
 344         int size, i;
 345         int slots = (fc->can_queue * 3) >> 1;
 346
 347         FCND(("Going to %sregister\n", unregister ? "un" : ""))
 348
 349         if (type == TYPE_SCSI_FCP) {
 350                 if (!unregister) {
 351                         fc->scsi_cmd_pool = (fcp_cmd *)
 352                                 dma_alloc_consistent (fc->dev,
 353                                                       slots * (sizeof (fcp_cmd) + fc->rsp_size),
 354                                                       &fc->dma_scsi_cmd);
 355                         fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots);
 356                         fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd);
 357                         fc->scsi_bitmap_end = (slots + 63) & ~63;
 358                         size = fc->scsi_bitmap_end / 8;
 359                         fc->scsi_bitmap = kmalloc (size, GFP_KERNEL);
 360                         memset (fc->scsi_bitmap, 0, size);
 361                         set_bit (0, fc->scsi_bitmap);
 362                         for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++)
 363                                 set_bit (i, fc->scsi_bitmap);
 364                         fc->scsi_free = fc->can_queue;
 365                         fc->cmd_slots = (fcp_cmnd **)kmalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);
 366                         memset(fc->cmd_slots, 0, slots * sizeof(fcp_cmnd*));
 367                         fc->abort_count = 0;
 368                 } else {
 369                         fc->scsi_name[0] = 0;
 370                         kfree (fc->scsi_bitmap);
 371                         kfree (fc->cmd_slots);
 372                         FCND(("Unregistering\n"));
 373                         if (fc->rst_pkt) {
 374                                 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
 375                                         kfree(fc->rst_pkt);
 376                                 else {
 377                                         /* Can't happen. Some memory would be lost. */
 378                                         printk("FC: Reset in progress. Now?!");
 379                                 }
 380                         }
 381                         FCND(("Unregistered\n"));
 382                 }
 383         } else
 384                 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
 385 }
 386
 387 static void fcp_scsi_done(Scsi_Cmnd *SCpnt);
 388
 389 static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
 390 {
 391         fcp_cmnd *fcmd;
 392         fcp_rsp  *rsp;
 393         int host_status;
 394         Scsi_Cmnd *SCpnt;
 395         int sense_len;
 396         int rsp_status;
 397
 398         fcmd = fc->cmd_slots[token];
 399         if (!fcmd) return;
 400         rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
 401         SCpnt = SC_FCMND(fcmd);
 402
 403         if (SCpnt->done != fcp_scsi_done)
 404                 return;
 405
 406         rsp_status = rsp->fcp_status;
 407         FCD(("rsp_status %08x status %08x\n", rsp_status, status))
 408         switch (status) {
 409         case FC_STATUS_OK:
 410                 host_status=DID_OK;
 411
 412                 if (rsp_status & FCP_STATUS_RESID) {
 413 #ifdef FCDEBUG
 414                         FCD(("Resid %d\n", rsp->fcp_resid))
 415                         {
 416                                 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
 417                                 int i;
 418
 419                                 printk ("Command ");
 420                                 for (i = 0; i < sizeof(fcp_cmd); i+=4)
 421                                         printk ("%08x ", *(u32 *)(((char *)cmd)+i));
 422                                 printk ("\nResponse ");
 423                                 for (i = 0; i < fc->rsp_size; i+=4)
 424                                         printk ("%08x ", *(u32 *)(((char *)rsp)+i));
 425                                 printk ("\n");
 426                         }
 427 #endif
 428                 }
 429
 430                 if (rsp_status & FCP_STATUS_SENSE_LEN) {
 431                         sense_len = rsp->fcp_sense_len;
 432                         if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
 433                         memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
 434                 }
 435
 436                 if (fcmd->data) {
 437                         if (SCpnt->use_sg)
 438                                 dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->buffer, SCpnt->use_sg,
 439                                              scsi_to_fc_dma_dir(SCpnt->sc_data_direction));
 440                         else
 441                                 dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,
 442                                                  scsi_to_fc_dma_dir(SCpnt->sc_data_direction));
 443                 }
 444                 break;
 445         default:
 446                 host_status=DID_ERROR; /* FIXME */
 447                 FCD(("Wrong FC status %d for token %d\n", status, token))
 448                 break;
 449         }
 450
 451         if (status_byte(rsp_status) == QUEUE_FULL) {
 452                 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->channel, SCpnt->target, rsp_status);
 453         }
 454
 455         SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
 456 #ifdef FCDEBUG
 457         if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
 458                         host_status, SCpnt->result);
 459 #endif
 460         SCpnt->done = fcmd->done;
 461         fcmd->done=NULL;
 462         clear_bit(token, fc->scsi_bitmap);
 463         fc->scsi_free++;
 464         FCD(("Calling scsi_done with %08x\n", SCpnt->result))
 465         SCpnt->scsi_done(SCpnt);
 466 }
 467
 468 void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
 469 {
 470         int magic;
 471         FCD(("receive_solicited %d %d %d\n", proto, token, status))
 472         switch (proto) {
 473         case TYPE_SCSI_FCP:
 474                 fcp_scsi_receive(fc, token, status, fch); break;
 475         case TYPE_EXTENDED_LS:
 476         case PROTO_REPORT_AL_MAP:
 477                 magic = 0;
 478                 if (fc->ls)
 479                         magic = ((ls *)(fc->ls))->magic;
 480                 if (magic == LSMAGIC) {
 481                         ls *l = (ls *)fc->ls;
 482                         int i = (token >= l->count) ? token - l->count : token;
 483
 484                         /* Let's be sure */
 485                         if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
 486                                 if (proto == TYPE_EXTENDED_LS)
 487                                         fcp_login_done(fc, token, status);
 488                                 else
 489                                         fcp_report_map_done(fc, token, status);
 490                                 break;
 491                         }
 492                 }
 493                 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
 494                 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
 495                         fcp_cmnd *fcmd;
 496
 497                         fcmd = fc->cmd_slots[token];
 498                         if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
 499                                 lse *l = (lse *)fcmd->ls;
 500
 501                                 l->status = status;
 502                                 up (&l->sem);
 503                         }
 504                 }
 505                 break;
 506         case PROTO_OFFLINE:
 507                 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
 508                         lso *l = (lso *)fc->ls;
 509
 510                         if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
 511                                 /* Wow, OFFLINE response arrived :) */
 512                                 FCD(("OFFLINE Response arrived\n"))
 513                                 fc->state = FC_STATE_OFFLINE;
 514                                 if (atomic_dec_and_test (&l->todo))
 515                                         up(&l->sem);
 516                         }
 517                 }
 518                 break;
 519
 520         default:
 521                 break;
 522         }
 523 }
 524
 525 void fcp_state_change(fc_channel *fc, int state)
 526 {
 527         FCD(("state_change %d %d\n", state, fc->state))
 528         if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
 529                 fc->state = FC_STATE_UNINITED;
 530         else if (state == FC_STATE_ONLINE)
 531                 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
 532         else
 533                 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
 534 }
 535
 536 int fcp_initialize(fc_channel *fcchain, int count)
 537 {
 538         fc_channel *fc;
 539         fcp_cmnd *fcmd;
 540         int i, retry, ret;
 541         ls *l;
 542
 543         FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
 544         FCND(("fc_channels %08lx\n", (long)fc_channels))
 545         FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
 546         l = kmalloc(sizeof (ls) + count, GFP_KERNEL);
 547         if (!l) {
 548                 printk ("FC: Cannot allocate memory for initialization\n");
 549                 return -ENOMEM;
 550         }
 551         memset (l, 0, sizeof(ls) + count);
 552         l->magic = LSMAGIC;
 553         l->count = count;
 554         FCND(("FCP Init for %d channels\n", count))
 555         init_MUTEX_LOCKED(&l->sem);
 556         l->timer.function = fcp_login_timeout;
 557         l->timer.data = (unsigned long)l;
 558         atomic_set (&l->todo, count);
 559         l->logi = kmalloc (count * 3 * sizeof(logi), GFP_KERNEL);
 560         l->fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
 561         if (!l->logi || !l->fcmds) {
 562                 if (l->logi) kfree (l->logi);
 563                 if (l->fcmds) kfree (l->fcmds);
 564                 kfree (l);
 565                 printk ("FC: Cannot allocate DMA memory for initialization\n");
 566                 return -ENOMEM;
 567         }
 568         memset (l->logi, 0, count * 3 * sizeof(logi));
 569         memset (l->fcmds, 0, count * sizeof(fcp_cmnd));
 570         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 571                 fc->state = FC_STATE_UNINITED;
 572                 fc->rst_pkt = NULL;     /* kmalloc when first used */
 573         }
 574         /* First try if we are in a AL topology */
 575         FCND(("Initializing REPORT_MAP packets\n"))
 576         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 577                 fcmd = l->fcmds + i;
 578                 fc->login = fcmd;
 579                 fc->ls = (void *)l;
 580                 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
 581                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
 582                                             FC_DMA_BIDIRECTIONAL);
 583                 fcmd->proto = PROTO_REPORT_AL_MAP;
 584                 fcmd->token = i;
 585                 fcmd->fc = fc;
 586         }
 587         for (retry = 0; retry < 8; retry++) {
 588                 int nqueued = 0;
 589                 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
 590                 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 591                         if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
 592                                 continue;
 593                         disable_irq(fc->irq);
 594                         if (fc->state == FC_STATE_MAYBEOFFLINE) {
 595                                 if (!l->grace[i]) {
 596                                         l->grace[i]++;
 597                                         FCD(("Grace\n"))
 598                                 } else {
 599                                         fc->state = FC_STATE_OFFLINE;
 600                                         enable_irq(fc->irq);
 601                                         dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
 602                                         if (atomic_dec_and_test (&l->todo))
 603                                                 goto all_done;
 604                                 }
 605                         }
 606                         ret = fc->hw_enque (fc, fc->login);
 607                         enable_irq(fc->irq);
 608                         if (!ret) {
 609                                 nqueued++;
 610                                 continue;
 611                         }
 612                         if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
 613                                 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
 614                                 fc_hdr *fch;
 615
 616                                 FCD(("SID %d DID %d\n", fc->sid, fc->did))
 617                                 fcmd = l->fcmds + i;
 618                                 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
 619                                 fch = &fcmd->fch;
 620                                 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
 621                                 FILL_FCHDR_SID(fch, 0);
 622                                 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
 623                                 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
 624                                 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
 625                                 fch->param = 0;
 626                                 l->logi [3 * i].code = LS_FLOGI;
 627                                 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
 628                                 fcmd->rsp = fcmd->cmd + sizeof(logi);
 629                                 fcmd->cmdlen = sizeof(logi);
 630                                 fcmd->rsplen = sizeof(logi);
 631                                 fcmd->data = (dma_addr_t)NULL;
 632                                 fcmd->class = FC_CLASS_SIMPLE;
 633                                 fcmd->proto = TYPE_EXTENDED_LS;
 634                         } else
 635                                 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
 636                 }
 637
 638                 if (nqueued) {
 639                         l->timer.expires = jiffies + 5 * HZ;
 640                         add_timer(&l->timer);
 641
 642                         down(&l->sem);
 643                         if (!atomic_read(&l->todo)) {
 644                                 FCND(("All channels answered in time\n"))
 645                                 break; /* All fc channels have answered us */
 646                         }
 647                 }
 648         }
 649 all_done:
 650         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 651                 fc->ls = NULL;
 652                 switch (fc->state) {
 653                 case FC_STATE_ONLINE: break;
 654                 case FC_STATE_OFFLINE: break;
 655                 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
 656                         break;
 657                 }
 658         }
 659         del_timer(&l->timer);
 660         kfree (l->logi);
 661         kfree (l->fcmds);
 662         kfree (l);
 663         return 0;
 664 }
 665
 666 int fcp_forceoffline(fc_channel *fcchain, int count)
 667 {
 668         fc_channel *fc;
 669         fcp_cmnd *fcmd;
 670         int i, ret;
 671         lso l;
 672
 673         memset (&l, 0, sizeof(lso));
 674         l.count = count;
 675         l.magic = LSOMAGIC;
 676         FCND(("FCP Force Offline for %d channels\n", count))
 677         init_MUTEX_LOCKED(&l.sem);
 678         l.timer.function = fcp_login_timeout;
 679         l.timer.data = (unsigned long)&l;
 680         atomic_set (&l.todo, count);
 681         l.fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
 682         if (!l.fcmds) {
 683                 kfree (l.fcmds);
 684                 printk ("FC: Cannot allocate memory for forcing offline\n");
 685                 return -ENOMEM;
 686         }
 687         memset (l.fcmds, 0, count * sizeof(fcp_cmnd));
 688         FCND(("Initializing OFFLINE packets\n"))
 689         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
 690                 fc->state = FC_STATE_UNINITED;
 691                 fcmd = l.fcmds + i;
 692                 fc->login = fcmd;
 693                 fc->ls = (void *)&l;
 694                 fcmd->did = fc->did;
 695                 fcmd->class = FC_CLASS_OFFLINE;
 696                 fcmd->proto = PROTO_OFFLINE;
 697                 fcmd->token = i;
 698                 fcmd->fc = fc;
 699                 disable_irq(fc->irq);
 700                 ret = fc->hw_enque (fc, fc->login);
 701                 enable_irq(fc->irq);
 702                 if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
 703         }
 704
 705         l.timer.expires = jiffies + 5 * HZ;
 706         add_timer(&l.timer);
 707         down(&l.sem);
 708         del_timer(&l.timer);
 709
 710         for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
 711                 fc->ls = NULL;
 712         kfree (l.fcmds);
 713         return 0;
 714 }
 715
 716 int fcp_init(fc_channel *fcchain)
 717 {
 718         fc_channel *fc;
 719         int count=0;
 720         int ret;
 721
 722         for (fc = fcchain; fc; fc = fc->next) {
 723                 fc->fcp_register = fcp_register;
 724                 count++;
 725         }
 726
 727         ret = fcp_initialize (fcchain, count);
 728         if (ret)
 729                 return ret;
 730
 731         if (!fc_channels)
 732                 fc_channels = fcchain;
 733         else {
 734                 for (fc = fc_channels; fc->next; fc = fc->next);
 735                 fc->next = fcchain;
 736         }
 737         return ret;
 738 }
 739
 740 void fcp_release(fc_channel *fcchain, int count)  /* count must > 0 */
 741 {
 742         fc_channel *fc;
 743         fc_channel *fcx;
 744
 745         for (fc = fcchain; --count && fc->next; fc = fc->next);
 746         if (count) {
 747                 printk("FC: nothing to release\n");
 748                 return;
 749         }
 750
 751         if (fc_channels == fcchain)
 752                 fc_channels = fc->next;
 753         else {
 754                 for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
 755                 fcx->next = fc->next;
 756         }
 757         fc->next = NULL;
 758
 759         /*
 760          *  We've just grabbed fcchain out of the fc_channel list
 761          *  and zero-terminated it, while destroying the count.
 762          *
 763          *  Freeing the fc's is the low level driver's responsibility.
 764          */
 765 }
 766
 767
 768 static void fcp_scsi_done (Scsi_Cmnd *SCpnt)
 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->channel * fc->targets + SCpnt->target] > (5 * 60 * HZ)) {
 797                                 fc->ages[SCpnt->channel * fc->targets + SCpnt->target] = 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                                                              scsi_to_fc_dma_dir(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                                                     scsi_to_fc_dma_dir(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_old_abort(Scsi_Cmnd *SCpnt)
 885 {
 886         printk("FC: Abort not implemented\n");
 887         return 1;
 888 }
 889
 890 int fcp_scsi_abort(Scsi_Cmnd *SCpnt)
 891 {
 892         /* Internal bookkeeping only. Lose 1 cmd_slots slot. */
 893         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
 894         fc_channel *fc = FC_SCMND(SCpnt);
 895
 896         /*
 897          * We react to abort requests by simply forgetting
 898          * about the command and pretending everything's sweet.
 899          * This may or may not be silly. We can't, however,
 900          * immediately reuse the command's cmd_slots slot,
 901          * as its result may arrive later and we cannot
 902          * check whether it is the aborted one, can't we?
 903          *
 904          * Therefore, after the first few aborts are done,
 905          * we tell the scsi error handler to do something clever.
 906          * It will eventually call host reset, refreshing
 907          * cmd_slots for us.
 908          *
 909          * There is a theoretical chance that we sometimes allow
 910          * more than can_queue packets to the jungle this way,
 911          * but the worst outcome possible is a series of
 912          * more aborts and eventually the dev_reset catharsis.
 913          */
 914
 915         if (++fc->abort_count < (fc->can_queue >> 1)) {
 916                 SCpnt->result = DID_ABORT;
 917                 fcmd->done(SCpnt);
 918                 printk("FC: soft abort\n");
 919                 return SUCCESS;
 920         } else {
 921                 printk("FC: hard abort refused\n");
 922                 return FAILED;
 923         }
 924 }
 925
 926 void fcp_scsi_reset_done(Scsi_Cmnd *SCpnt)
 927 {
 928         fc_channel *fc = FC_SCMND(SCpnt);
 929
 930         fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
 931         up(fc->rst_pkt->host->eh_action);
 932 }
 933
 934 #define FCP_RESET_TIMEOUT (2*HZ)
 935
 936 int fcp_scsi_dev_reset(Scsi_Cmnd *SCpnt)
 937 {
 938         fcp_cmd *cmd;
 939         fcp_cmnd *fcmd;
 940         fc_channel *fc = FC_SCMND(SCpnt);
 941         DECLARE_MUTEX_LOCKED(sem);
 942
 943         if (!fc->rst_pkt) {
 944                 fc->rst_pkt = (Scsi_Cmnd *) kmalloc(sizeof(SCpnt), GFP_KERNEL);
 945                 if (!fc->rst_pkt) return FAILED;
 946
 947                 fcmd = FCP_CMND(fc->rst_pkt);
 948
 949
 950                 fcmd->token = 0;
 951                 cmd = fc->scsi_cmd_pool + 0;
 952                 FCD(("Preparing rst packet\n"))
 953                 fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
 954                 fc->rst_pkt->channel = SCpnt->channel;
 955                 fc->rst_pkt->target = SCpnt->target;
 956                 fc->rst_pkt->lun = 0;
 957                 fc->rst_pkt->cmd_len = 0;
 958
 959                 fc->cmd_slots[0] = fcmd;
 960
 961                 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
 962                 fcmd->data = (dma_addr_t)NULL;
 963                 fcmd->proto = TYPE_SCSI_FCP;
 964
 965                 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
 966                 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
 967                 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)))
 968         } else {
 969                 fcmd = FCP_CMND(fc->rst_pkt);
 970                 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
 971                         return FAILED; /* or SUCCESS. Only these */
 972         }
 973         fc->rst_pkt->done = NULL;
 974
 975
 976         fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
 977
 978         fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
 979         fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
 980         fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
 981
 982         add_timer(&fc->rst_pkt->eh_timeout);
 983
 984         /*
 985          * Set up the semaphore so we wait for the command to complete.
 986          */
 987
 988         fc->rst_pkt->host->eh_action = &sem;
 989         fc->rst_pkt->request.rq_status = RQ_SCSI_BUSY;
 990
 991         fc->rst_pkt->done = fcp_scsi_reset_done;
 992         fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
 993
 994         down(&sem);
 995
 996         fc->rst_pkt->host->eh_action = NULL;
 997         del_timer(&fc->rst_pkt->eh_timeout);
 998
 999         /*
1000          * See if timeout.  If so, tell the host to forget about it.
1001          * In other words, we don't want a callback any more.
1002          */
1003         if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
1004                 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1005                 return FAILED;
1006         }
1007         fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1008         return SUCCESS;
1009 }
1010
1011 int fcp_scsi_bus_reset(Scsi_Cmnd *SCpnt)
1012 {
1013         printk ("FC: bus reset!\n");
1014         return FAILED;
1015 }
1016
1017 int fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1018 {
1019         fc_channel *fc = FC_SCMND(SCpnt);
1020         fcp_cmnd *fcmd = FCP_CMND(SCpnt);
1021         int i;
1022
1023         printk ("FC: host reset\n");
1024
1025         for (i=0; i < fc->can_queue; i++) {
1026                 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1027                         SCpnt->result = DID_RESET;
1028                         fcmd->done(SCpnt);
1029                         fc->cmd_slots[i] = NULL;
1030                 }
1031         }
1032         fc->reset(fc);
1033         fc->abort_count = 0;
1034         if (fcp_initialize(fc, 1)) return SUCCESS;
1035         else return FAILED;
1036 }
1037
1038 static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1039 {
1040         long i;
1041
1042         i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1043         set_bit (i, fc->scsi_bitmap);
1044         fcmd->token = i;
1045         fc->scsi_free--;
1046         fc->cmd_slots[fcmd->token] = fcmd;
1047         return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1048 }
1049
1050 static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1051 {
1052         fcp_cmnd _fcmd, *fcmd;
1053         fc_hdr *fch;
1054         lse l;
1055         int i;
1056
1057         fcmd = &_fcmd;
1058         memset(fcmd, 0, sizeof(fcmd));
1059         FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1060         fch = &fcmd->fch;
1061         FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1062         FILL_FCHDR_SID(fch, fc->sid);
1063         FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1064         FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1065         FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1066         fch->param = 0;
1067         fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, FC_DMA_BIDIRECTIONAL);
1068         fcmd->rsp = fcmd->cmd + len;
1069         fcmd->cmdlen = len;
1070         fcmd->rsplen = len;
1071         fcmd->data = (dma_addr_t)NULL;
1072         fcmd->fc = fc;
1073         fcmd->class = FC_CLASS_SIMPLE;
1074         fcmd->proto = TYPE_EXTENDED_LS;
1075
1076         memset (&l, 0, sizeof(lse));
1077         l.magic = LSEMAGIC;
1078         init_MUTEX_LOCKED(&l.sem);
1079         l.timer.function = fcp_login_timeout;
1080         l.timer.data = (unsigned long)&l;
1081         l.status = FC_STATUS_TIMED_OUT;
1082         fcmd->ls = (void *)&l;
1083
1084         disable_irq(fc->irq);
1085         fcp_els_queue_it(fc, fcmd);
1086         enable_irq(fc->irq);
1087
1088         for (i = 0;;) {
1089                 l.timer.expires = jiffies + 5 * HZ;
1090                 add_timer(&l.timer);
1091                 down(&l.sem);
1092                 del_timer(&l.timer);
1093                 if (l.status != FC_STATUS_TIMED_OUT) break;
1094                 if (++i == 3) break;
1095                 disable_irq(fc->irq);
1096                 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1097                 enable_irq(fc->irq);
1098         }
1099
1100         clear_bit(fcmd->token, fc->scsi_bitmap);
1101         fc->scsi_free++;
1102         dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, FC_DMA_BIDIRECTIONAL);
1103         return l.status;
1104 }
1105
1106 int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1107 {
1108         logi *l;
1109         int status;
1110
1111         l = (logi *)kmalloc(2 * sizeof(logi), GFP_KERNEL);
1112         if (!l) return -ENOMEM;
1113         memset(l, 0, 2 * sizeof(logi));
1114         l->code = LS_PLOGI;
1115         memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1116         memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1117         memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1118         memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1119         status = fc_do_els(fc, alpa, l, sizeof(logi));
1120         if (status == FC_STATUS_OK) {
1121                 if (l[1].code == LS_ACC) {
1122 #ifdef FCDEBUG
1123                         u32 *u = (u32 *)&l[1].nport_wwn;
1124                         FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1125                                 u[0], u[1], u[2], u[3]))
1126 #endif
1127                         memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1128                         memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1129                 } else
1130                         status = FC_STATUS_BAD_RSP;
1131         }
1132         kfree(l);
1133         return status;
1134 }
1135
1136 typedef struct {
1137         unsigned int code;
1138         unsigned params[4];
1139 } prli;
1140
1141 int fc_do_prli(fc_channel *fc, unsigned char alpa)
1142 {
1143         prli *p;
1144         int status;
1145
1146         p = (prli *)kmalloc(2 * sizeof(prli), GFP_KERNEL);
1147         if (!p) return -ENOMEM;
1148         memset(p, 0, 2 * sizeof(prli));
1149         p->code = LS_PRLI;
1150         p->params[0] = 0x08002000;
1151         p->params[3] = 0x00000022;
1152         status = fc_do_els(fc, alpa, p, sizeof(prli));
1153         if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1154                 status = FC_STATUS_BAD_RSP;
1155         kfree(p);
1156         return status;
1157 }
1158
1159 MODULE_LICENSE("GPL");