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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / fc4 / fc.c
blob82de9e1adb1eaf80f4ece0410baafc0755dae519
1 /* fc.c: Generic Fibre Channel and FC4 SCSI driver.
2 *
3 * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
4 * Copyright (C) 1997,1998 Jirka Hanika (geo@ff.cuni.cz)
5 *
6 * There are two kinds of Fibre Channel adapters used in Linux. Either
7 * the adapter is "smart" and does all FC bookkeeping by itself and
8 * just presents a standard SCSI interface to the operating system
9 * (that's e.g. the case with Qlogic FC cards), or leaves most of the FC
10 * bookkeeping to the OS (e.g. soc, socal). Drivers for the former adapters
11 * will look like normal SCSI drivers (with the exception of max_id will be
12 * usually 127), the latter on the other side allows SCSI, IP over FC and other
13 * protocols. This driver tree is for the latter adapters.
14 *
15 * This file should support both Point-to-Point and Arbitrated Loop topologies.
16 *
17 * Sources:
18 * Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994
19 * dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995
20 * Fibre Channel Arbitrated Loop (FC-AL), Rev. 4.5, 1995
21 * Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), Rev. 2.1, 1997
22 */
23
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/jiffies.h>
27 #include <linux/types.h>
28 #include <linux/fcntl.h>
29 #include <linux/interrupt.h>
30 #include <linux/ptrace.h>
31 #include <linux/ioport.h>
32 #include <linux/in.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/init.h>
36
37 #include <asm/pgtable.h>
38 #include <asm/irq.h>
39 #include <asm/semaphore.h>
40 #include "fcp_impl.h"
41 #include <scsi/scsi_host.h>
42
43 /* #define FCDEBUG */
44
45 #define fc_printk printk ("%s: ", fc->name); printk
46
47 #ifdef FCDEBUG
48 #define FCD(x) fc_printk x;
49 #define FCND(x) printk ("FC: "); printk x;
50 #else
51 #define FCD(x)
52 #define FCND(x)
53 #endif
54
55 #ifdef __sparc__
56 #define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p)
57 #define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h)
58 #define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir)
59 #define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir)
60 #define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir)
61 #define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir)
62 #else
63 #define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p)
64 #define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h)
65 #define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir)
66 #define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir)
67 #define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir)
68 #define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir)
69 #endif
70
71 #define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp))
72 #define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->device->host->hostdata[0]))
73 #define SC_FCMND(fcmnd) ((struct scsi_cmnd *)((long)fcmnd - (long)&(((struct scsi_cmnd *)0)->SCp)))
74
75 static int fcp_scsi_queue_it(fc_channel *, struct scsi_cmnd *, fcp_cmnd *, int);
76 void fcp_queue_empty(fc_channel *);
77
78 static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd)
79 {
80 if (!fc->scsi_que) {
81 fc->scsi_que = fcmd;
82 fcmd->next = fcmd;
83 fcmd->prev = fcmd;
84 } else {
85 fc->scsi_que->prev->next = fcmd;
86 fcmd->prev = fc->scsi_que->prev;
87 fc->scsi_que->prev = fcmd;
88 fcmd->next = fc->scsi_que;
89 }
90 }
91
92 static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd)
93 {
94 if (fcmd == fcmd->next) {
95 fc->scsi_que = NULL;
96 return;
97 }
98 if (fcmd == fc->scsi_que)
99 fc->scsi_que = fcmd->next;
100 fcmd->prev->next = fcmd->next;
101 fcmd->next->prev = fcmd->prev;
102 }
103
104 fc_channel *fc_channels = NULL;
105
106 #define LSMAGIC 620829043
107 typedef struct {
108 /* Must be first */
109 struct semaphore sem;
110 int magic;
111 int count;
112 logi *logi;
113 fcp_cmnd *fcmds;
114 atomic_t todo;
115 struct timer_list timer;
116 unsigned char grace[0];
117 } ls;
118
119 #define LSOMAGIC 654907799
120 typedef struct {
121 /* Must be first */
122 struct semaphore sem;
123 int magic;
124 int count;
125 fcp_cmnd *fcmds;
126 atomic_t todo;
127 struct timer_list timer;
128 } lso;
129
130 #define LSEMAGIC 84482456
131 typedef struct {
132 /* Must be first */
133 struct semaphore sem;
134 int magic;
135 int status;
136 struct timer_list timer;
137 } lse;
138
139 static void fcp_login_timeout(unsigned long data)
140 {
141 ls *l = (ls *)data;
142 FCND(("Login timeout\n"))
143 up(&l->sem);
144 }
145
146 static void fcp_login_done(fc_channel *fc, int i, int status)
147 {
148 fcp_cmnd *fcmd;
149 logi *plogi;
150 fc_hdr *fch;
151 ls *l = (ls *)fc->ls;
152
153 FCD(("Login done %d %d\n", i, status))
154 if (i < l->count) {
155 if (fc->state == FC_STATE_FPORT_OK) {
156 FCD(("Additional FPORT_OK received with status %d\n", status))
157 return;
158 }
159 switch (status) {
160 case FC_STATUS_OK: /* Oh, we found a fabric */
161 case FC_STATUS_P_RJT: /* Oh, we haven't found any */
162 fc->state = FC_STATE_FPORT_OK;
163 fcmd = l->fcmds + i;
164 plogi = l->logi + 3 * i;
165 dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi),
166 DMA_BIDIRECTIONAL);
167 plogi->code = LS_PLOGI;
168 memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
169 memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
170 memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm));
171 memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm));
172 fch = &fcmd->fch;
173 fcmd->token += l->count;
174 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did);
175 FILL_FCHDR_SID(fch, fc->sid);
176 #ifdef FCDEBUG
177 {
178 int i;
179 unsigned *x = (unsigned *)plogi;
180 printk ("logi: ");
181 for (i = 0; i < 21; i++)
182 printk ("%08x ", x[i]);
183 printk ("\n");
184 }
185 #endif
186 fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi),
187 DMA_BIDIRECTIONAL);
188 fcmd->rsp = fcmd->cmd + 2 * sizeof(logi);
189 if (fc->hw_enque (fc, fcmd))
190 printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name);
191 break;
192 case FC_STATUS_ERR_OFFLINE:
193 fc->state = FC_STATE_MAYBEOFFLINE;
194 FCD (("FC is offline %d\n", l->grace[i]))
195 break;
196 default:
197 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
198 /* Do some sort of error recovery here */
199 break;
200 }
201 } else {
202 i -= l->count;
203 if (fc->state != FC_STATE_FPORT_OK) {
204 FCD(("Unexpected N-PORT rsp received"))
205 return;
206 }
207 switch (status) {
208 case FC_STATUS_OK:
209 plogi = l->logi + 3 * i;
210 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
211 DMA_BIDIRECTIONAL);
212 if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) {
213 memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn));
214 FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo))
215 } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo ||
216 fc->wwn_dest.hi != plogi[1].node_wwn.hi) {
217 printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n",
218 fc->name,
219 *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo,
220 *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo);
221 }
222 fc->state = FC_STATE_ONLINE;
223 printk ("%s: ONLINE\n", fc->name);
224 if (atomic_dec_and_test (&l->todo))
225 up(&l->sem);
226 break;
227 case FC_STATUS_ERR_OFFLINE:
228 fc->state = FC_STATE_OFFLINE;
229 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
230 DMA_BIDIRECTIONAL);
231 printk ("%s: FC is offline\n", fc->name);
232 if (atomic_dec_and_test (&l->todo))
233 up(&l->sem);
234 break;
235 default:
236 printk ("PLOGI failed for %s with status %d\n", fc->name, status);
237 /* Do some sort of error recovery here */
238 break;
239 }
240 }
241 }
242
243 static void fcp_report_map_done(fc_channel *fc, int i, int status)
244 {
245 fcp_cmnd *fcmd;
246 fc_hdr *fch;
247 unsigned char j;
248 ls *l = (ls *)fc->ls;
249 fc_al_posmap *p;
250
251 FCD(("Report map done %d %d\n", i, status))
252 switch (status) {
253 case FC_STATUS_OK: /* Ok, let's have a fun on a loop */
254 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
255 DMA_BIDIRECTIONAL);
256 p = (fc_al_posmap *)(l->logi + 3 * i);
257 #ifdef FCDEBUG
258 {
259 u32 *u = (u32 *)p;
260 FCD(("%08x\n", u[0]))
261 u ++;
262 FCD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n", u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
263 }
264 #endif
265 if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) {
266 printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic);
267 fc->state = FC_STATE_OFFLINE;
268 } else {
269 fc->posmap = kzalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL);
270 if (!fc->posmap) {
271 printk("FC: Not enough memory, offlining channel\n");
272 fc->state = FC_STATE_OFFLINE;
273 } else {
274 int k;
275 /* FIXME: This is where SOCAL transfers our AL-PA.
276 Keep it here till we found out what other cards do... */
277 fc->sid = (p->magic & 0xff);
278 for (i = 0; i < p->len; i++)
279 if (p->alpa[i] == fc->sid)
280 break;
281 k = p->len;
282 if (i == p->len)
283 i = 0;
284 else {
285 p->len--;
286 i++;
287 }
288 fc->posmap->len = p->len;
289 for (j = 0; j < p->len; j++) {
290 if (i == k) i = 0;
291 fc->posmap->list[j] = p->alpa[i++];
292 }
293 fc->state = FC_STATE_ONLINE;
294 }
295 }
296 printk ("%s: ONLINE\n", fc->name);
297 if (atomic_dec_and_test (&l->todo))
298 up(&l->sem);
299 break;
300 case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */
301 FCD(("SID %d DID %d\n", fc->sid, fc->did))
302 fcmd = l->fcmds + i;
303 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi),
304 DMA_BIDIRECTIONAL);
305 fch = &fcmd->fch;
306 memset(l->logi + 3 * i, 0, 3 * sizeof(logi));
307 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
308 FILL_FCHDR_SID(fch, 0);
309 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
310 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
311 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
312 fch->param = 0;
313 l->logi [3 * i].code = LS_FLOGI;
314 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
315 DMA_BIDIRECTIONAL);
316 fcmd->rsp = fcmd->cmd + sizeof(logi);
317 fcmd->cmdlen = sizeof(logi);
318 fcmd->rsplen = sizeof(logi);
319 fcmd->data = (dma_addr_t)NULL;
320 fcmd->class = FC_CLASS_SIMPLE;
321 fcmd->proto = TYPE_EXTENDED_LS;
322 if (fc->hw_enque (fc, fcmd))
323 printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name);
324 break;
325 case FC_STATUS_ERR_OFFLINE:
326 fc->state = FC_STATE_MAYBEOFFLINE;
327 FCD (("FC is offline %d\n", l->grace[i]))
328 break;
329 default:
330 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
331 /* Do some sort of error recovery here */
332 break;
333 }
334 }
335
336 void fcp_register(fc_channel *fc, u8 type, int unregister)
337 {
338 int size, i;
339 int slots = (fc->can_queue * 3) >> 1;
340
341 FCND(("Going to %sregister\n", unregister ? "un" : ""))
342
343 if (type == TYPE_SCSI_FCP) {
344 if (!unregister) {
345 fc->scsi_cmd_pool = (fcp_cmd *)
346 dma_alloc_consistent (fc->dev,
347 slots * (sizeof (fcp_cmd) + fc->rsp_size),
348 &fc->dma_scsi_cmd);
349 fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots);
350 fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd);
351 fc->scsi_bitmap_end = (slots + 63) & ~63;
352 size = fc->scsi_bitmap_end / 8;
353 fc->scsi_bitmap = kzalloc (size, GFP_KERNEL);
354 set_bit (0, fc->scsi_bitmap);
355 for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++)
356 set_bit (i, fc->scsi_bitmap);
357 fc->scsi_free = fc->can_queue;
358 fc->cmd_slots = kzalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);
359 fc->abort_count = 0;
360 } else {
361 fc->scsi_name[0] = 0;
362 kfree (fc->scsi_bitmap);
363 kfree (fc->cmd_slots);
364 FCND(("Unregistering\n"));
365 #if 0
366 if (fc->rst_pkt) {
367 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
368 kfree(fc->rst_pkt);
369 else {
370 /* Can't happen. Some memory would be lost. */
371 printk("FC: Reset in progress. Now?!");
372 }
373 }
374 #endif
375 FCND(("Unregistered\n"));
376 }
377 } else
378 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
379 }
380
381 static void fcp_scsi_done(struct scsi_cmnd *SCpnt);
382
383 static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
384 {
385 fcp_cmnd *fcmd;
386 fcp_rsp *rsp;
387 int host_status;
388 struct scsi_cmnd *SCpnt;
389 int sense_len;
390 int rsp_status;
391
392 fcmd = fc->cmd_slots[token];
393 if (!fcmd) return;
394 rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
395 SCpnt = SC_FCMND(fcmd);
396
397 if (SCpnt->done != fcp_scsi_done)
398 return;
399
400 rsp_status = rsp->fcp_status;
401 FCD(("rsp_status %08x status %08x\n", rsp_status, status))
402 switch (status) {
403 case FC_STATUS_OK:
404 host_status=DID_OK;
405
406 if (rsp_status & FCP_STATUS_RESID) {
407 #ifdef FCDEBUG
408 FCD(("Resid %d\n", rsp->fcp_resid))
409 {
410 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
411 int i;
412
413 printk ("Command ");
414 for (i = 0; i < sizeof(fcp_cmd); i+=4)
415 printk ("%08x ", *(u32 *)(((char *)cmd)+i));
416 printk ("\nResponse ");
417 for (i = 0; i < fc->rsp_size; i+=4)
418 printk ("%08x ", *(u32 *)(((char *)rsp)+i));
419 printk ("\n");
420 }
421 #endif
422 }
423
424 if (rsp_status & FCP_STATUS_SENSE_LEN) {
425 sense_len = rsp->fcp_sense_len;
426 if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
427 memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
428 }
429
430 if (fcmd->data)
431 dma_unmap_sg(fc->dev, scsi_sglist(SCpnt),
432 scsi_sg_count(SCpnt),
433 SCpnt->sc_data_direction);
434 break;
435 default:
436 host_status=DID_ERROR; /* FIXME */
437 FCD(("Wrong FC status %d for token %d\n", status, token))
438 break;
439 }
440
441 if (status_byte(rsp_status) == QUEUE_FULL) {
442 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status);
443 }
444
445 SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
446 #ifdef FCDEBUG
447 if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
448 host_status, SCpnt->result);
449 #endif
450 SCpnt->done = fcmd->done;
451 fcmd->done=NULL;
452 clear_bit(token, fc->scsi_bitmap);
453 fc->scsi_free++;
454 FCD(("Calling scsi_done with %08x\n", SCpnt->result))
455 SCpnt->scsi_done(SCpnt);
456 }
457
458 void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
459 {
460 int magic;
461 FCD(("receive_solicited %d %d %d\n", proto, token, status))
462 switch (proto) {
463 case TYPE_SCSI_FCP:
464 fcp_scsi_receive(fc, token, status, fch); break;
465 case TYPE_EXTENDED_LS:
466 case PROTO_REPORT_AL_MAP:
467 magic = 0;
468 if (fc->ls)
469 magic = ((ls *)(fc->ls))->magic;
470 if (magic == LSMAGIC) {
471 ls *l = (ls *)fc->ls;
472 int i = (token >= l->count) ? token - l->count : token;
473
474 /* Let's be sure */
475 if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
476 if (proto == TYPE_EXTENDED_LS)
477 fcp_login_done(fc, token, status);
478 else
479 fcp_report_map_done(fc, token, status);
480 break;
481 }
482 }
483 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
484 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
485 fcp_cmnd *fcmd;
486
487 fcmd = fc->cmd_slots[token];
488 if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
489 lse *l = (lse *)fcmd->ls;
490
491 l->status = status;
492 up (&l->sem);
493 }
494 }
495 break;
496 case PROTO_OFFLINE:
497 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
498 lso *l = (lso *)fc->ls;
499
500 if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
501 /* Wow, OFFLINE response arrived :) */
502 FCD(("OFFLINE Response arrived\n"))
503 fc->state = FC_STATE_OFFLINE;
504 if (atomic_dec_and_test (&l->todo))
505 up(&l->sem);
506 }
507 }
508 break;
509
510 default:
511 break;
512 }
513 }
514
515 void fcp_state_change(fc_channel *fc, int state)
516 {
517 FCD(("state_change %d %d\n", state, fc->state))
518 if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
519 fc->state = FC_STATE_UNINITED;
520 else if (state == FC_STATE_ONLINE)
521 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
522 else
523 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
524 }
525
526 int fcp_initialize(fc_channel *fcchain, int count)
527 {
528 fc_channel *fc;
529 fcp_cmnd *fcmd;
530 int i, retry, ret;
531 ls *l;
532
533 FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
534 FCND(("fc_channels %08lx\n", (long)fc_channels))
535 FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
536 l = kzalloc(sizeof (ls) + count, GFP_KERNEL);
537 if (!l) {
538 printk ("FC: Cannot allocate memory for initialization\n");
539 return -ENOMEM;
540 }
541 l->magic = LSMAGIC;
542 l->count = count;
543 FCND(("FCP Init for %d channels\n", count))
544 init_MUTEX_LOCKED(&l->sem);
545 init_timer(&l->timer);
546 l->timer.function = fcp_login_timeout;
547 l->timer.data = (unsigned long)l;
548 atomic_set (&l->todo, count);
549 l->logi = kzalloc (count * 3 * sizeof(logi), GFP_KERNEL);
550 l->fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
551 if (!l->logi || !l->fcmds) {
552 kfree (l->logi);
553 kfree (l->fcmds);
554 kfree (l);
555 printk ("FC: Cannot allocate DMA memory for initialization\n");
556 return -ENOMEM;
557 }
558 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
559 fc->state = FC_STATE_UNINITED;
560 fc->rst_pkt = NULL; /* kmalloc when first used */
561 }
562 /* First try if we are in a AL topology */
563 FCND(("Initializing REPORT_MAP packets\n"))
564 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
565 fcmd = l->fcmds + i;
566 fc->login = fcmd;
567 fc->ls = (void *)l;
568 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
569 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
570 DMA_BIDIRECTIONAL);
571 fcmd->proto = PROTO_REPORT_AL_MAP;
572 fcmd->token = i;
573 fcmd->fc = fc;
574 }
575 for (retry = 0; retry < 8; retry++) {
576 int nqueued = 0;
577 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
578 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
579 if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
580 continue;
581 disable_irq(fc->irq);
582 if (fc->state == FC_STATE_MAYBEOFFLINE) {
583 if (!l->grace[i]) {
584 l->grace[i]++;
585 FCD(("Grace\n"))
586 } else {
587 fc->state = FC_STATE_OFFLINE;
588 enable_irq(fc->irq);
589 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
590 if (atomic_dec_and_test (&l->todo))
591 goto all_done;
592 }
593 }
594 ret = fc->hw_enque (fc, fc->login);
595 enable_irq(fc->irq);
596 if (!ret) {
597 nqueued++;
598 continue;
599 }
600 if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
601 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
602 fc_hdr *fch;
603
604 FCD(("SID %d DID %d\n", fc->sid, fc->did))
605 fcmd = l->fcmds + i;
606 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
607 fch = &fcmd->fch;
608 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
609 FILL_FCHDR_SID(fch, 0);
610 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
611 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
612 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
613 fch->param = 0;
614 l->logi [3 * i].code = LS_FLOGI;
615 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
616 fcmd->rsp = fcmd->cmd + sizeof(logi);
617 fcmd->cmdlen = sizeof(logi);
618 fcmd->rsplen = sizeof(logi);
619 fcmd->data = (dma_addr_t)NULL;
620 fcmd->class = FC_CLASS_SIMPLE;
621 fcmd->proto = TYPE_EXTENDED_LS;
622 } else
623 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
624 }
625
626 if (nqueued) {
627 l->timer.expires = jiffies + 5 * HZ;
628 add_timer(&l->timer);
629
630 down(&l->sem);
631 if (!atomic_read(&l->todo)) {
632 FCND(("All channels answered in time\n"))
633 break; /* All fc channels have answered us */
634 }
635 }
636 }
637 all_done:
638 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
639 fc->ls = NULL;
640 switch (fc->state) {
641 case FC_STATE_ONLINE: break;
642 case FC_STATE_OFFLINE: break;
643 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
644 break;
645 }
646 }
647 del_timer(&l->timer);
648 kfree (l->logi);
649 kfree (l->fcmds);
650 kfree (l);
651 return 0;
652 }
653
654 int fcp_forceoffline(fc_channel *fcchain, int count)
655 {
656 fc_channel *fc;
657 fcp_cmnd *fcmd;
658 int i, ret;
659 lso l;
660
661 memset (&l, 0, sizeof(lso));
662 l.count = count;
663 l.magic = LSOMAGIC;
664 FCND(("FCP Force Offline for %d channels\n", count))
665 init_MUTEX_LOCKED(&l.sem);
666 init_timer(&l.timer);
667 l.timer.function = fcp_login_timeout;
668 l.timer.data = (unsigned long)&l;
669 atomic_set (&l.todo, count);
670 l.fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
671 if (!l.fcmds) {
672 printk ("FC: Cannot allocate memory for forcing offline\n");
673 return -ENOMEM;
674 }
675 FCND(("Initializing OFFLINE packets\n"))
676 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
677 fc->state = FC_STATE_UNINITED;
678 fcmd = l.fcmds + i;
679 fc->login = fcmd;
680 fc->ls = (void *)&l;
681 fcmd->did = fc->did;
682 fcmd->class = FC_CLASS_OFFLINE;
683 fcmd->proto = PROTO_OFFLINE;
684 fcmd->token = i;
685 fcmd->fc = fc;
686 disable_irq(fc->irq);
687 ret = fc->hw_enque (fc, fc->login);
688 enable_irq(fc->irq);
689 if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
690 }
691
692 l.timer.expires = jiffies + 5 * HZ;
693 add_timer(&l.timer);
694 down(&l.sem);
695 del_timer(&l.timer);
696
697 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
698 fc->ls = NULL;
699 kfree (l.fcmds);
700 return 0;
701 }
702
703 int fcp_init(fc_channel *fcchain)
704 {
705 fc_channel *fc;
706 int count=0;
707 int ret;
708
709 for (fc = fcchain; fc; fc = fc->next) {
710 fc->fcp_register = fcp_register;
711 count++;
712 }
713
714 ret = fcp_initialize (fcchain, count);
715 if (ret)
716 return ret;
717
718 if (!fc_channels)
719 fc_channels = fcchain;
720 else {
721 for (fc = fc_channels; fc->next; fc = fc->next);
722 fc->next = fcchain;
723 }
724 return ret;
725 }
726
727 void fcp_release(fc_channel *fcchain, int count) /* count must > 0 */
728 {
729 fc_channel *fc;
730 fc_channel *fcx;
731
732 for (fc = fcchain; --count && fc->next; fc = fc->next);
733 if (count) {
734 printk("FC: nothing to release\n");
735 return;
736 }
737
738 if (fc_channels == fcchain)
739 fc_channels = fc->next;
740 else {
741 for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
742 fcx->next = fc->next;
743 }
744 fc->next = NULL;
745
746 /*
747 * We've just grabbed fcchain out of the fc_channel list
748 * and zero-terminated it, while destroying the count.
749 *
750 * Freeing the fc's is the low level driver's responsibility.
751 */
752 }
753
754
755 static void fcp_scsi_done(struct scsi_cmnd *SCpnt)
756 {
757 if (FCP_CMND(SCpnt)->done)
758 FCP_CMND(SCpnt)->done(SCpnt);
759 }
760
761 static int fcp_scsi_queue_it(fc_channel *fc, struct scsi_cmnd *SCpnt,
762 fcp_cmnd *fcmd, int prepare)
763 {
764 long i;
765 fcp_cmd *cmd;
766 u32 fcp_cntl;
767 if (prepare) {
768 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
769 set_bit (i, fc->scsi_bitmap);
770 fcmd->token = i;
771 cmd = fc->scsi_cmd_pool + i;
772
773 if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) {
774 /* Invalid channel/id/lun and couldn't map it into fcp_addr */
775 clear_bit (i, fc->scsi_bitmap);
776 SCpnt->result = (DID_BAD_TARGET << 16);
777 SCpnt->scsi_done(SCpnt);
778 return 0;
779 }
780 fc->scsi_free--;
781 fc->cmd_slots[fcmd->token] = fcmd;
782
783 if (SCpnt->device->tagged_supported) {
784 if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) {
785 fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies;
786 fcp_cntl = FCP_CNTL_QTYPE_ORDERED;
787 } else
788 fcp_cntl = FCP_CNTL_QTYPE_SIMPLE;
789 } else
790 fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED;
791
792 if (!scsi_bufflen(SCpnt)) {
793 cmd->fcp_cntl = fcp_cntl;
794 fcmd->data = (dma_addr_t)NULL;
795 } else {
796 struct scatterlist *sg;
797 int nents;
798
799 switch (SCpnt->cmnd[0]) {
800 case WRITE_6:
801 case WRITE_10:
802 case WRITE_12:
803 cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break;
804 default:
805 cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break;
806 }
807
808 sg = scsi_sglist(SCpnt);
809 nents = dma_map_sg(fc->dev, sg, scsi_sg_count(SCpnt),
810 SCpnt->sc_data_direction);
811 fcmd->data = sg_dma_address(sg);
812 cmd->fcp_data_len = sg_dma_len(sg);
813 }
814 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
815 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
816 FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
817 }
818 FCD(("Trying to enque %p\n", fcmd))
819 if (!fc->scsi_que) {
820 if (!fc->hw_enque (fc, fcmd)) {
821 FCD(("hw_enque succeeded for %p\n", fcmd))
822 return 0;
823 }
824 }
825 FCD(("Putting into que1 %p\n", fcmd))
826 fcp_scsi_insert_queue (fc, fcmd);
827 return 0;
828 }
829
830 int fcp_scsi_queuecommand(struct scsi_cmnd *SCpnt,
831 void (* done)(struct scsi_cmnd *))
832 {
833 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
834 fc_channel *fc = FC_SCMND(SCpnt);
835
836 FCD(("Entering SCSI queuecommand %p\n", fcmd))
837 if (SCpnt->done != fcp_scsi_done) {
838 fcmd->done = SCpnt->done;
839 SCpnt->done = fcp_scsi_done;
840 SCpnt->scsi_done = done;
841 fcmd->proto = TYPE_SCSI_FCP;
842 if (!fc->scsi_free) {
843 FCD(("FC: !scsi_free, putting cmd on ML queue\n"))
844 #if (FCP_SCSI_USE_NEW_EH_CODE == 0)
845 printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n");
846 #endif
847 return 1;
848 }
849 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1);
850 }
851 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0);
852 }
853
854 void fcp_queue_empty(fc_channel *fc)
855 {
856 fcp_cmnd *fcmd;
857
858 FCD(("Queue empty\n"))
859 while ((fcmd = fc->scsi_que)) {
860 /* The hw told us we can try again queue some packet */
861 if (fc->hw_enque (fc, fcmd))
862 break;
863 fcp_scsi_remove_queue (fc, fcmd);
864 }
865 }
866
867 int fcp_scsi_abort(struct scsi_cmnd *SCpnt)
868 {
869 /* Internal bookkeeping only. Lose 1 cmd_slots slot. */
870 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
871 fc_channel *fc = FC_SCMND(SCpnt);
872
873 /*
874 * We react to abort requests by simply forgetting
875 * about the command and pretending everything's sweet.
876 * This may or may not be silly. We can't, however,
877 * immediately reuse the command's cmd_slots slot,
878 * as its result may arrive later and we cannot
879 * check whether it is the aborted one, can't we?
880 *
881 * Therefore, after the first few aborts are done,
882 * we tell the scsi error handler to do something clever.
883 * It will eventually call host reset, refreshing
884 * cmd_slots for us.
885 *
886 * There is a theoretical chance that we sometimes allow
887 * more than can_queue packets to the jungle this way,
888 * but the worst outcome possible is a series of
889 * more aborts and eventually the dev_reset catharsis.
890 */
891
892 if (++fc->abort_count < (fc->can_queue >> 1)) {
893 SCpnt->result = DID_ABORT;
894 fcmd->done(SCpnt);
895 printk("FC: soft abort\n");
896 return SUCCESS;
897 } else {
898 printk("FC: hard abort refused\n");
899 return FAILED;
900 }
901 }
902
903 #if 0
904 void fcp_scsi_reset_done(struct scsi_cmnd *SCpnt)
905 {
906 fc_channel *fc = FC_SCMND(SCpnt);
907
908 fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
909 up(fc->rst_pkt->device->host->eh_action);
910 }
911 #endif
912
913 #define FCP_RESET_TIMEOUT (2*HZ)
914
915 int fcp_scsi_dev_reset(struct scsi_cmnd *SCpnt)
916 {
917 #if 0 /* broken junk, but if davem wants to compile this driver, let him.. */
918 unsigned long flags;
919 fcp_cmd *cmd;
920 fcp_cmnd *fcmd;
921 fc_channel *fc = FC_SCMND(SCpnt);
922 DECLARE_MUTEX_LOCKED(sem);
923
924 if (!fc->rst_pkt) {
925 fc->rst_pkt = kmalloc(sizeof(SCpnt), GFP_KERNEL);
926 if (!fc->rst_pkt) return FAILED;
927
928 fcmd = FCP_CMND(fc->rst_pkt);
929
930
931 fcmd->token = 0;
932 cmd = fc->scsi_cmd_pool + 0;
933 FCD(("Preparing rst packet\n"))
934 fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
935 fc->rst_pkt->device = SCpnt->device;
936 fc->rst_pkt->cmd_len = 0;
937
938 fc->cmd_slots[0] = fcmd;
939
940 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
941 fcmd->data = (dma_addr_t)NULL;
942 fcmd->proto = TYPE_SCSI_FCP;
943
944 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
945 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
946 FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
947 } else {
948 fcmd = FCP_CMND(fc->rst_pkt);
949 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
950 return FAILED; /* or SUCCESS. Only these */
951 }
952 fc->rst_pkt->done = NULL;
953
954
955 fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
956 init_timer(&fc->rst_pkt->eh_timeout);
957 fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
958 fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
959 fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
960
961 add_timer(&fc->rst_pkt->eh_timeout);
962
963 /*
964 * Set up the semaphore so we wait for the command to complete.
965 */
966
967 fc->rst_pkt->device->host->eh_action = &sem;
968
969 fc->rst_pkt->done = fcp_scsi_reset_done;
970
971 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
972 fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
973 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
974
975 down(&sem);
976
977 fc->rst_pkt->device->host->eh_action = NULL;
978 del_timer(&fc->rst_pkt->eh_timeout);
979
980 /*
981 * See if timeout. If so, tell the host to forget about it.
982 * In other words, we don't want a callback any more.
983 */
984 if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
985 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
986 return FAILED;
987 }
988 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
989 #endif
990 return SUCCESS;
991 }
992
993 static int __fcp_scsi_host_reset(struct scsi_cmnd *SCpnt)
994 {
995 fc_channel *fc = FC_SCMND(SCpnt);
996 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
997 int i;
998
999 printk ("FC: host reset\n");
1000
1001 for (i=0; i < fc->can_queue; i++) {
1002 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1003 SCpnt->result = DID_RESET;
1004 fcmd->done(SCpnt);
1005 fc->cmd_slots[i] = NULL;
1006 }
1007 }
1008 fc->reset(fc);
1009 fc->abort_count = 0;
1010 if (fcp_initialize(fc, 1)) return SUCCESS;
1011 else return FAILED;
1012 }
1013
1014 int fcp_scsi_host_reset(struct scsi_cmnd *SCpnt)
1015 {
1016 unsigned long flags;
1017 int rc;
1018
1019 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
1020 rc = __fcp_scsi_host_reset(SCpnt);
1021 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
1022
1023 return rc;
1024 }
1025
1026 static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1027 {
1028 long i;
1029
1030 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1031 set_bit (i, fc->scsi_bitmap);
1032 fcmd->token = i;
1033 fc->scsi_free--;
1034 fc->cmd_slots[fcmd->token] = fcmd;
1035 return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1036 }
1037
1038 static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1039 {
1040 fcp_cmnd _fcmd, *fcmd;
1041 fc_hdr *fch;
1042 lse l;
1043 int i;
1044
1045 fcmd = &_fcmd;
1046 memset(fcmd, 0, sizeof(fcp_cmnd));
1047 FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1048 fch = &fcmd->fch;
1049 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1050 FILL_FCHDR_SID(fch, fc->sid);
1051 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1052 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1053 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1054 fch->param = 0;
1055 fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL);
1056 fcmd->rsp = fcmd->cmd + len;
1057 fcmd->cmdlen = len;
1058 fcmd->rsplen = len;
1059 fcmd->data = (dma_addr_t)NULL;
1060 fcmd->fc = fc;
1061 fcmd->class = FC_CLASS_SIMPLE;
1062 fcmd->proto = TYPE_EXTENDED_LS;
1063
1064 memset (&l, 0, sizeof(lse));
1065 l.magic = LSEMAGIC;
1066 init_MUTEX_LOCKED(&l.sem);
1067 l.timer.function = fcp_login_timeout;
1068 l.timer.data = (unsigned long)&l;
1069 l.status = FC_STATUS_TIMED_OUT;
1070 fcmd->ls = (void *)&l;
1071
1072 disable_irq(fc->irq);
1073 fcp_els_queue_it(fc, fcmd);
1074 enable_irq(fc->irq);
1075
1076 for (i = 0;;) {
1077 l.timer.expires = jiffies + 5 * HZ;
1078 add_timer(&l.timer);
1079 down(&l.sem);
1080 del_timer(&l.timer);
1081 if (l.status != FC_STATUS_TIMED_OUT) break;
1082 if (++i == 3) break;
1083 disable_irq(fc->irq);
1084 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1085 enable_irq(fc->irq);
1086 }
1087
1088 clear_bit(fcmd->token, fc->scsi_bitmap);
1089 fc->scsi_free++;
1090 dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL);
1091 return l.status;
1092 }
1093
1094 int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1095 {
1096 logi *l;
1097 int status;
1098
1099 l = kzalloc(2 * sizeof(logi), GFP_KERNEL);
1100 if (!l) return -ENOMEM;
1101 l->code = LS_PLOGI;
1102 memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1103 memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1104 memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1105 memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1106 status = fc_do_els(fc, alpa, l, sizeof(logi));
1107 if (status == FC_STATUS_OK) {
1108 if (l[1].code == LS_ACC) {
1109 #ifdef FCDEBUG
1110 u32 *u = (u32 *)&l[1].nport_wwn;
1111 FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1112 u[0], u[1], u[2], u[3]))
1113 #endif
1114 memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1115 memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1116 } else
1117 status = FC_STATUS_BAD_RSP;
1118 }
1119 kfree(l);
1120 return status;
1121 }
1122
1123 typedef struct {
1124 unsigned int code;
1125 unsigned params[4];
1126 } prli;
1127
1128 int fc_do_prli(fc_channel *fc, unsigned char alpa)
1129 {
1130 prli *p;
1131 int status;
1132
1133 p = kzalloc(2 * sizeof(prli), GFP_KERNEL);
1134 if (!p) return -ENOMEM;
1135 p->code = LS_PRLI;
1136 p->params[0] = 0x08002000;
1137 p->params[3] = 0x00000022;
1138 status = fc_do_els(fc, alpa, p, sizeof(prli));
1139 if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1140 status = FC_STATUS_BAD_RSP;
1141 kfree(p);
1142 return status;
1143 }
1144
1145 MODULE_LICENSE("GPL");
1146
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree