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[mirror_ubuntu-bionic-kernel.git] / drivers / fc4 / fc.c
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1da177e4
LT		 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
75static int fcp_scsi_queue_it(fc_channel *, Scsi_Cmnd *, fcp_cmnd *, int);
76void fcp_queue_empty(fc_channel *);
77
78static 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
92static 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
104fc_channel *fc_channels = NULL;
105
106#define LSMAGIC 620829043
107typedef 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
120typedef 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
131typedef struct {
132 /* Must be first */
133 struct semaphore sem;
134 int magic;
135 int status;
136 struct timer_list timer;
137} lse;
138
139static void fcp_login_timeout(unsigned long data)
140{
141 ls *l = (ls *)data;
142 FCND(("Login timeout\n"))
143 up(&l->sem);
144}
145
146static 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
243static 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
337void 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"));
fc2b035d 368#if 0
1da177e4
LT		 369 if (fc->rst_pkt) {
370 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
371 kfree(fc->rst_pkt);
372 else {
373 /* Can't happen. Some memory would be lost. */
374 printk("FC: Reset in progress. Now?!");
375 }
376 }
fc2b035d 377#endif
1da177e4
LT		 378 FCND(("Unregistered\n"));
379 }
380 } else
381 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
382}
383
384static void fcp_scsi_done(Scsi_Cmnd *SCpnt);
385
386static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
387{
388 fcp_cmnd *fcmd;
389 fcp_rsp *rsp;
390 int host_status;
391 Scsi_Cmnd *SCpnt;
392 int sense_len;
393 int rsp_status;
394
395 fcmd = fc->cmd_slots[token];
396 if (!fcmd) return;
397 rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
398 SCpnt = SC_FCMND(fcmd);
399
400 if (SCpnt->done != fcp_scsi_done)
401 return;
402
403 rsp_status = rsp->fcp_status;
404 FCD(("rsp_status %08x status %08x\n", rsp_status, status))
405 switch (status) {
406 case FC_STATUS_OK:
407 host_status=DID_OK;
408
409 if (rsp_status & FCP_STATUS_RESID) {
410#ifdef FCDEBUG
411 FCD(("Resid %d\n", rsp->fcp_resid))
412 {
413 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
414 int i;
415
416 printk ("Command ");
417 for (i = 0; i < sizeof(fcp_cmd); i+=4)
418 printk ("%08x ", *(u32 *)(((char *)cmd)+i));
419 printk ("\nResponse ");
420 for (i = 0; i < fc->rsp_size; i+=4)
421 printk ("%08x ", *(u32 *)(((char *)rsp)+i));
422 printk ("\n");
423 }
424#endif
425 }
426
427 if (rsp_status & FCP_STATUS_SENSE_LEN) {
428 sense_len = rsp->fcp_sense_len;
429 if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
430 memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
431 }
432
433 if (fcmd->data) {
434 if (SCpnt->use_sg)
435 dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->buffer,
436 SCpnt->use_sg,
437 SCpnt->sc_data_direction);
438 else
439 dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,
440 SCpnt->sc_data_direction);
441 }
442 break;
443 default:
444 host_status=DID_ERROR; /* FIXME */
445 FCD(("Wrong FC status %d for token %d\n", status, token))
446 break;
447 }
448
449 if (status_byte(rsp_status) == QUEUE_FULL) {
450 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status);
451 }
452
453 SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
454#ifdef FCDEBUG
455 if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
456 host_status, SCpnt->result);
457#endif
458 SCpnt->done = fcmd->done;
459 fcmd->done=NULL;
460 clear_bit(token, fc->scsi_bitmap);
461 fc->scsi_free++;
462 FCD(("Calling scsi_done with %08x\n", SCpnt->result))
463 SCpnt->scsi_done(SCpnt);
464}
465
466void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
467{
468 int magic;
469 FCD(("receive_solicited %d %d %d\n", proto, token, status))
470 switch (proto) {
471 case TYPE_SCSI_FCP:
472 fcp_scsi_receive(fc, token, status, fch); break;
473 case TYPE_EXTENDED_LS:
474 case PROTO_REPORT_AL_MAP:
475 magic = 0;
476 if (fc->ls)
477 magic = ((ls *)(fc->ls))->magic;
478 if (magic == LSMAGIC) {
479 ls *l = (ls *)fc->ls;
480 int i = (token >= l->count) ? token - l->count : token;
481
482 /* Let's be sure */
483 if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
484 if (proto == TYPE_EXTENDED_LS)
485 fcp_login_done(fc, token, status);
486 else
487 fcp_report_map_done(fc, token, status);
488 break;
489 }
490 }
491 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
492 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
493 fcp_cmnd *fcmd;
494
495 fcmd = fc->cmd_slots[token];
496 if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
497 lse *l = (lse *)fcmd->ls;
498
499 l->status = status;
500 up (&l->sem);
501 }
502 }
503 break;
504 case PROTO_OFFLINE:
505 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
506 lso *l = (lso *)fc->ls;
507
508 if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
509 /* Wow, OFFLINE response arrived :) */
510 FCD(("OFFLINE Response arrived\n"))
511 fc->state = FC_STATE_OFFLINE;
512 if (atomic_dec_and_test (&l->todo))
513 up(&l->sem);
514 }
515 }
516 break;
517
518 default:
519 break;
520 }
521}
522
523void fcp_state_change(fc_channel *fc, int state)
524{
525 FCD(("state_change %d %d\n", state, fc->state))
526 if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
527 fc->state = FC_STATE_UNINITED;
528 else if (state == FC_STATE_ONLINE)
529 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
530 else
531 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
532}
533
534int fcp_initialize(fc_channel *fcchain, int count)
535{
536 fc_channel *fc;
537 fcp_cmnd *fcmd;
538 int i, retry, ret;
539 ls *l;
540
541 FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
542 FCND(("fc_channels %08lx\n", (long)fc_channels))
543 FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
544 l = kmalloc(sizeof (ls) + count, GFP_KERNEL);
545 if (!l) {
546 printk ("FC: Cannot allocate memory for initialization\n");
547 return -ENOMEM;
548 }
549 memset (l, 0, sizeof(ls) + count);
550 l->magic = LSMAGIC;
551 l->count = count;
552 FCND(("FCP Init for %d channels\n", count))
553 init_MUTEX_LOCKED(&l->sem);
554 init_timer(&l->timer);
555 l->timer.function = fcp_login_timeout;
556 l->timer.data = (unsigned long)l;
557 atomic_set (&l->todo, count);
558 l->logi = kmalloc (count * 3 * sizeof(logi), GFP_KERNEL);
559 l->fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
560 if (!l->logi || !l->fcmds) {
561 if (l->logi) kfree (l->logi);
562 if (l->fcmds) kfree (l->fcmds);
563 kfree (l);
564 printk ("FC: Cannot allocate DMA memory for initialization\n");
565 return -ENOMEM;
566 }
567 memset (l->logi, 0, count * 3 * sizeof(logi));
568 memset (l->fcmds, 0, count * sizeof(fcp_cmnd));
569 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
570 fc->state = FC_STATE_UNINITED;
571 fc->rst_pkt = NULL; /* kmalloc when first used */
572 }
573 /* First try if we are in a AL topology */
574 FCND(("Initializing REPORT_MAP packets\n"))
575 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
576 fcmd = l->fcmds + i;
577 fc->login = fcmd;
578 fc->ls = (void *)l;
579 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
580 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
581 DMA_BIDIRECTIONAL);
582 fcmd->proto = PROTO_REPORT_AL_MAP;
583 fcmd->token = i;
584 fcmd->fc = fc;
585 }
586 for (retry = 0; retry < 8; retry++) {
587 int nqueued = 0;
588 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
589 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
590 if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
591 continue;
592 disable_irq(fc->irq);
593 if (fc->state == FC_STATE_MAYBEOFFLINE) {
594 if (!l->grace[i]) {
595 l->grace[i]++;
596 FCD(("Grace\n"))
597 } else {
598 fc->state = FC_STATE_OFFLINE;
599 enable_irq(fc->irq);
600 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
601 if (atomic_dec_and_test (&l->todo))
602 goto all_done;
603 }
604 }
605 ret = fc->hw_enque (fc, fc->login);
606 enable_irq(fc->irq);
607 if (!ret) {
608 nqueued++;
609 continue;
610 }
611 if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
612 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
613 fc_hdr *fch;
614
615 FCD(("SID %d DID %d\n", fc->sid, fc->did))
616 fcmd = l->fcmds + i;
617 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
618 fch = &fcmd->fch;
619 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
620 FILL_FCHDR_SID(fch, 0);
621 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
622 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
623 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
624 fch->param = 0;
625 l->logi [3 * i].code = LS_FLOGI;
626 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
627 fcmd->rsp = fcmd->cmd + sizeof(logi);
628 fcmd->cmdlen = sizeof(logi);
629 fcmd->rsplen = sizeof(logi);
630 fcmd->data = (dma_addr_t)NULL;
631 fcmd->class = FC_CLASS_SIMPLE;
632 fcmd->proto = TYPE_EXTENDED_LS;
633 } else
634 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
635 }
636
637 if (nqueued) {
638 l->timer.expires = jiffies + 5 * HZ;
639 add_timer(&l->timer);
640
641 down(&l->sem);
642 if (!atomic_read(&l->todo)) {
643 FCND(("All channels answered in time\n"))
644 break; /* All fc channels have answered us */
645 }
646 }
647 }
648all_done:
649 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
650 fc->ls = NULL;
651 switch (fc->state) {
652 case FC_STATE_ONLINE: break;
653 case FC_STATE_OFFLINE: break;
654 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
655 break;
656 }
657 }
658 del_timer(&l->timer);
659 kfree (l->logi);
660 kfree (l->fcmds);
661 kfree (l);
662 return 0;
663}
664
665int fcp_forceoffline(fc_channel *fcchain, int count)
666{
667 fc_channel *fc;
668 fcp_cmnd *fcmd;
669 int i, ret;
670 lso l;
671
672 memset (&l, 0, sizeof(lso));
673 l.count = count;
674 l.magic = LSOMAGIC;
675 FCND(("FCP Force Offline for %d channels\n", count))
676 init_MUTEX_LOCKED(&l.sem);
677 init_timer(&l.timer);
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
716int 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
740void 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
768static void fcp_scsi_done (Scsi_Cmnd *SCpnt)
769{
1da177e4
LT		 770 if (FCP_CMND(SCpnt)->done)
771 FCP_CMND(SCpnt)->done(SCpnt);
1da177e4
LT		 772}
773
774static 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
848int 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
871void 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
884int 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)) {
1da177e4 910 SCpnt->result = DID_ABORT;
1da177e4 911 fcmd->done(SCpnt);
1da177e4
LT		 912 printk("FC: soft abort\n");
913 return SUCCESS;
914 } else {
915 printk("FC: hard abort refused\n");
916 return FAILED;
917 }
918}
919
fc2b035d 920#if 0
1da177e4
LT		 921void fcp_scsi_reset_done(Scsi_Cmnd *SCpnt)
922{
923 fc_channel *fc = FC_SCMND(SCpnt);
924
925 fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
926 up(fc->rst_pkt->device->host->eh_action);
927}
fc2b035d 928#endif
1da177e4
LT		 929
930#define FCP_RESET_TIMEOUT (2*HZ)
931
932int fcp_scsi_dev_reset(Scsi_Cmnd *SCpnt)
933{
fc2b035d 934#if 0 /* broken junk, but if davem wants to compile this driver, let him.. */
98f72a1c 935 unsigned long flags;
1da177e4
LT		 936 fcp_cmd *cmd;
937 fcp_cmnd *fcmd;
938 fc_channel *fc = FC_SCMND(SCpnt);
939 DECLARE_MUTEX_LOCKED(sem);
940
941 if (!fc->rst_pkt) {
942 fc->rst_pkt = (Scsi_Cmnd *) kmalloc(sizeof(SCpnt), GFP_KERNEL);
943 if (!fc->rst_pkt) return FAILED;
944
945 fcmd = FCP_CMND(fc->rst_pkt);
946
947
948 fcmd->token = 0;
949 cmd = fc->scsi_cmd_pool + 0;
950 FCD(("Preparing rst packet\n"))
951 fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
952 fc->rst_pkt->device = SCpnt->device;
953 fc->rst_pkt->cmd_len = 0;
954
955 fc->cmd_slots[0] = fcmd;
956
957 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
958 fcmd->data = (dma_addr_t)NULL;
959 fcmd->proto = TYPE_SCSI_FCP;
960
961 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
962 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
963 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)))
964 } else {
965 fcmd = FCP_CMND(fc->rst_pkt);
966 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
967 return FAILED; /* or SUCCESS. Only these */
968 }
969 fc->rst_pkt->done = NULL;
970
971
972 fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
973 init_timer(&fc->rst_pkt->eh_timeout);
974 fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
975 fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
976 fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
977
978 add_timer(&fc->rst_pkt->eh_timeout);
979
980 /*
981 * Set up the semaphore so we wait for the command to complete.
982 */
983
984 fc->rst_pkt->device->host->eh_action = &sem;
985 fc->rst_pkt->request->rq_status = RQ_SCSI_BUSY;
986
987 fc->rst_pkt->done = fcp_scsi_reset_done;
68b3aa7c
JG		 988
989 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
1da177e4 990 fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
68b3aa7c 991 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
1da177e4
LT		 992
993 down(&sem);
994
995 fc->rst_pkt->device->host->eh_action = NULL;
996 del_timer(&fc->rst_pkt->eh_timeout);
997
998 /*
999 * See if timeout. If so, tell the host to forget about it.
1000 * In other words, we don't want a callback any more.
1001 */
1002 if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
1003 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1004 return FAILED;
1005 }
1006 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
fc2b035d 1007#endif
e572f7cc 1008 return SUCCESS;
1da177e4
LT		 1009}
1010
df0ae249 1011static int __fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1da177e4
LT		 1012{
1013 fc_channel *fc = FC_SCMND(SCpnt);
1014 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
1015 int i;
1016
1017 printk ("FC: host reset\n");
1018
1019 for (i=0; i < fc->can_queue; i++) {
1020 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1021 SCpnt->result = DID_RESET;
1022 fcmd->done(SCpnt);
1023 fc->cmd_slots[i] = NULL;
1024 }
1025 }
1026 fc->reset(fc);
1027 fc->abort_count = 0;
1028 if (fcp_initialize(fc, 1)) return SUCCESS;
1029 else return FAILED;
1030}
1031
df0ae249
JG		 1032int fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1033{
98f72a1c 1034 unsigned long flags;
df0ae249
JG		 1035 int rc;
1036
1037 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
1038 rc = __fcp_scsi_host_reset(SCpnt);
1039 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
1040
1041 return rc;
1042}
1043
1da177e4
LT		 1044static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1045{
1046 long i;
1047
1048 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1049 set_bit (i, fc->scsi_bitmap);
1050 fcmd->token = i;
1051 fc->scsi_free--;
1052 fc->cmd_slots[fcmd->token] = fcmd;
1053 return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1054}
1055
1056static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1057{
1058 fcp_cmnd _fcmd, *fcmd;
1059 fc_hdr *fch;
1060 lse l;
1061 int i;
1062
1063 fcmd = &_fcmd;
1064 memset(fcmd, 0, sizeof(fcmd));
1065 FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1066 fch = &fcmd->fch;
1067 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1068 FILL_FCHDR_SID(fch, fc->sid);
1069 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1070 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1071 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1072 fch->param = 0;
1073 fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL);
1074 fcmd->rsp = fcmd->cmd + len;
1075 fcmd->cmdlen = len;
1076 fcmd->rsplen = len;
1077 fcmd->data = (dma_addr_t)NULL;
1078 fcmd->fc = fc;
1079 fcmd->class = FC_CLASS_SIMPLE;
1080 fcmd->proto = TYPE_EXTENDED_LS;
1081
1082 memset (&l, 0, sizeof(lse));
1083 l.magic = LSEMAGIC;
1084 init_MUTEX_LOCKED(&l.sem);
1085 l.timer.function = fcp_login_timeout;
1086 l.timer.data = (unsigned long)&l;
1087 l.status = FC_STATUS_TIMED_OUT;
1088 fcmd->ls = (void *)&l;
1089
1090 disable_irq(fc->irq);
1091 fcp_els_queue_it(fc, fcmd);
1092 enable_irq(fc->irq);
1093
1094 for (i = 0;;) {
1095 l.timer.expires = jiffies + 5 * HZ;
1096 add_timer(&l.timer);
1097 down(&l.sem);
1098 del_timer(&l.timer);
1099 if (l.status != FC_STATUS_TIMED_OUT) break;
1100 if (++i == 3) break;
1101 disable_irq(fc->irq);
1102 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1103 enable_irq(fc->irq);
1104 }
1105
1106 clear_bit(fcmd->token, fc->scsi_bitmap);
1107 fc->scsi_free++;
1108 dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL);
1109 return l.status;
1110}
1111
1112int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1113{
1114 logi *l;
1115 int status;
1116
1117 l = (logi *)kmalloc(2 * sizeof(logi), GFP_KERNEL);
1118 if (!l) return -ENOMEM;
1119 memset(l, 0, 2 * sizeof(logi));
1120 l->code = LS_PLOGI;
1121 memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1122 memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1123 memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1124 memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1125 status = fc_do_els(fc, alpa, l, sizeof(logi));
1126 if (status == FC_STATUS_OK) {
1127 if (l[1].code == LS_ACC) {
1128#ifdef FCDEBUG
1129 u32 *u = (u32 *)&l[1].nport_wwn;
1130 FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1131 u[0], u[1], u[2], u[3]))
1132#endif
1133 memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1134 memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1135 } else
1136 status = FC_STATUS_BAD_RSP;
1137 }
1138 kfree(l);
1139 return status;
1140}
1141
1142typedef struct {
1143 unsigned int code;
1144 unsigned params[4];
1145} prli;
1146
1147int fc_do_prli(fc_channel *fc, unsigned char alpa)
1148{
1149 prli *p;
1150 int status;
1151
1152 p = (prli *)kmalloc(2 * sizeof(prli), GFP_KERNEL);
1153 if (!p) return -ENOMEM;
1154 memset(p, 0, 2 * sizeof(prli));
1155 p->code = LS_PRLI;
1156 p->params[0] = 0x08002000;
1157 p->params[3] = 0x00000022;
1158 status = fc_do_els(fc, alpa, p, sizeof(prli));
1159 if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1160 status = FC_STATUS_BAD_RSP;
1161 kfree(p);
1162 return status;
1163}
1164
1165MODULE_LICENSE("GPL");
1166
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