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[ACPI] Bind ACPI and PCI devices
[linux-2.6-block.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"));
368 if (fc->rst_pkt) {
369 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
370 kfree(fc->rst_pkt);
371 else {
372 /* Can't happen. Some memory would be lost. */
373 printk("FC: Reset in progress. Now?!");
374 }
375 }
376 FCND(("Unregistered\n"));
377 }
378 } else
379 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
380}
381
382static void fcp_scsi_done(Scsi_Cmnd *SCpnt);
383
384static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
385{
386 fcp_cmnd *fcmd;
387 fcp_rsp *rsp;
388 int host_status;
389 Scsi_Cmnd *SCpnt;
390 int sense_len;
391 int rsp_status;
392
393 fcmd = fc->cmd_slots[token];
394 if (!fcmd) return;
395 rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
396 SCpnt = SC_FCMND(fcmd);
397
398 if (SCpnt->done != fcp_scsi_done)
399 return;
400
401 rsp_status = rsp->fcp_status;
402 FCD(("rsp_status %08x status %08x\n", rsp_status, status))
403 switch (status) {
404 case FC_STATUS_OK:
405 host_status=DID_OK;
406
407 if (rsp_status & FCP_STATUS_RESID) {
408#ifdef FCDEBUG
409 FCD(("Resid %d\n", rsp->fcp_resid))
410 {
411 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
412 int i;
413
414 printk ("Command ");
415 for (i = 0; i < sizeof(fcp_cmd); i+=4)
416 printk ("%08x ", *(u32 *)(((char *)cmd)+i));
417 printk ("\nResponse ");
418 for (i = 0; i < fc->rsp_size; i+=4)
419 printk ("%08x ", *(u32 *)(((char *)rsp)+i));
420 printk ("\n");
421 }
422#endif
423 }
424
425 if (rsp_status & FCP_STATUS_SENSE_LEN) {
426 sense_len = rsp->fcp_sense_len;
427 if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
428 memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
429 }
430
431 if (fcmd->data) {
432 if (SCpnt->use_sg)
433 dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->buffer,
434 SCpnt->use_sg,
435 SCpnt->sc_data_direction);
436 else
437 dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,
438 SCpnt->sc_data_direction);
439 }
440 break;
441 default:
442 host_status=DID_ERROR; /* FIXME */
443 FCD(("Wrong FC status %d for token %d\n", status, token))
444 break;
445 }
446
447 if (status_byte(rsp_status) == QUEUE_FULL) {
448 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status);
449 }
450
451 SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
452#ifdef FCDEBUG
453 if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
454 host_status, SCpnt->result);
455#endif
456 SCpnt->done = fcmd->done;
457 fcmd->done=NULL;
458 clear_bit(token, fc->scsi_bitmap);
459 fc->scsi_free++;
460 FCD(("Calling scsi_done with %08x\n", SCpnt->result))
461 SCpnt->scsi_done(SCpnt);
462}
463
464void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
465{
466 int magic;
467 FCD(("receive_solicited %d %d %d\n", proto, token, status))
468 switch (proto) {
469 case TYPE_SCSI_FCP:
470 fcp_scsi_receive(fc, token, status, fch); break;
471 case TYPE_EXTENDED_LS:
472 case PROTO_REPORT_AL_MAP:
473 magic = 0;
474 if (fc->ls)
475 magic = ((ls *)(fc->ls))->magic;
476 if (magic == LSMAGIC) {
477 ls *l = (ls *)fc->ls;
478 int i = (token >= l->count) ? token - l->count : token;
479
480 /* Let's be sure */
481 if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
482 if (proto == TYPE_EXTENDED_LS)
483 fcp_login_done(fc, token, status);
484 else
485 fcp_report_map_done(fc, token, status);
486 break;
487 }
488 }
489 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
490 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
491 fcp_cmnd *fcmd;
492
493 fcmd = fc->cmd_slots[token];
494 if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
495 lse *l = (lse *)fcmd->ls;
496
497 l->status = status;
498 up (&l->sem);
499 }
500 }
501 break;
502 case PROTO_OFFLINE:
503 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
504 lso *l = (lso *)fc->ls;
505
506 if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
507 /* Wow, OFFLINE response arrived :) */
508 FCD(("OFFLINE Response arrived\n"))
509 fc->state = FC_STATE_OFFLINE;
510 if (atomic_dec_and_test (&l->todo))
511 up(&l->sem);
512 }
513 }
514 break;
515
516 default:
517 break;
518 }
519}
520
521void fcp_state_change(fc_channel *fc, int state)
522{
523 FCD(("state_change %d %d\n", state, fc->state))
524 if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
525 fc->state = FC_STATE_UNINITED;
526 else if (state == FC_STATE_ONLINE)
527 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
528 else
529 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
530}
531
532int fcp_initialize(fc_channel *fcchain, int count)
533{
534 fc_channel *fc;
535 fcp_cmnd *fcmd;
536 int i, retry, ret;
537 ls *l;
538
539 FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
540 FCND(("fc_channels %08lx\n", (long)fc_channels))
541 FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
542 l = kmalloc(sizeof (ls) + count, GFP_KERNEL);
543 if (!l) {
544 printk ("FC: Cannot allocate memory for initialization\n");
545 return -ENOMEM;
546 }
547 memset (l, 0, sizeof(ls) + count);
548 l->magic = LSMAGIC;
549 l->count = count;
550 FCND(("FCP Init for %d channels\n", count))
551 init_MUTEX_LOCKED(&l->sem);
552 init_timer(&l->timer);
553 l->timer.function = fcp_login_timeout;
554 l->timer.data = (unsigned long)l;
555 atomic_set (&l->todo, count);
556 l->logi = kmalloc (count * 3 * sizeof(logi), GFP_KERNEL);
557 l->fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
558 if (!l->logi || !l->fcmds) {
559 if (l->logi) kfree (l->logi);
560 if (l->fcmds) kfree (l->fcmds);
561 kfree (l);
562 printk ("FC: Cannot allocate DMA memory for initialization\n");
563 return -ENOMEM;
564 }
565 memset (l->logi, 0, count * 3 * sizeof(logi));
566 memset (l->fcmds, 0, count * sizeof(fcp_cmnd));
567 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
568 fc->state = FC_STATE_UNINITED;
569 fc->rst_pkt = NULL; /* kmalloc when first used */
570 }
571 /* First try if we are in a AL topology */
572 FCND(("Initializing REPORT_MAP packets\n"))
573 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
574 fcmd = l->fcmds + i;
575 fc->login = fcmd;
576 fc->ls = (void *)l;
577 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
578 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
579 DMA_BIDIRECTIONAL);
580 fcmd->proto = PROTO_REPORT_AL_MAP;
581 fcmd->token = i;
582 fcmd->fc = fc;
583 }
584 for (retry = 0; retry < 8; retry++) {
585 int nqueued = 0;
586 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
587 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
588 if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
589 continue;
590 disable_irq(fc->irq);
591 if (fc->state == FC_STATE_MAYBEOFFLINE) {
592 if (!l->grace[i]) {
593 l->grace[i]++;
594 FCD(("Grace\n"))
595 } else {
596 fc->state = FC_STATE_OFFLINE;
597 enable_irq(fc->irq);
598 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
599 if (atomic_dec_and_test (&l->todo))
600 goto all_done;
601 }
602 }
603 ret = fc->hw_enque (fc, fc->login);
604 enable_irq(fc->irq);
605 if (!ret) {
606 nqueued++;
607 continue;
608 }
609 if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
610 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
611 fc_hdr *fch;
612
613 FCD(("SID %d DID %d\n", fc->sid, fc->did))
614 fcmd = l->fcmds + i;
615 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
616 fch = &fcmd->fch;
617 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
618 FILL_FCHDR_SID(fch, 0);
619 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
620 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
621 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
622 fch->param = 0;
623 l->logi [3 * i].code = LS_FLOGI;
624 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
625 fcmd->rsp = fcmd->cmd + sizeof(logi);
626 fcmd->cmdlen = sizeof(logi);
627 fcmd->rsplen = sizeof(logi);
628 fcmd->data = (dma_addr_t)NULL;
629 fcmd->class = FC_CLASS_SIMPLE;
630 fcmd->proto = TYPE_EXTENDED_LS;
631 } else
632 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
633 }
634
635 if (nqueued) {
636 l->timer.expires = jiffies + 5 * HZ;
637 add_timer(&l->timer);
638
639 down(&l->sem);
640 if (!atomic_read(&l->todo)) {
641 FCND(("All channels answered in time\n"))
642 break; /* All fc channels have answered us */
643 }
644 }
645 }
646all_done:
647 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
648 fc->ls = NULL;
649 switch (fc->state) {
650 case FC_STATE_ONLINE: break;
651 case FC_STATE_OFFLINE: break;
652 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
653 break;
654 }
655 }
656 del_timer(&l->timer);
657 kfree (l->logi);
658 kfree (l->fcmds);
659 kfree (l);
660 return 0;
661}
662
663int fcp_forceoffline(fc_channel *fcchain, int count)
664{
665 fc_channel *fc;
666 fcp_cmnd *fcmd;
667 int i, ret;
668 lso l;
669
670 memset (&l, 0, sizeof(lso));
671 l.count = count;
672 l.magic = LSOMAGIC;
673 FCND(("FCP Force Offline for %d channels\n", count))
674 init_MUTEX_LOCKED(&l.sem);
675 init_timer(&l.timer);
676 l.timer.function = fcp_login_timeout;
677 l.timer.data = (unsigned long)&l;
678 atomic_set (&l.todo, count);
679 l.fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
680 if (!l.fcmds) {
681 kfree (l.fcmds);
682 printk ("FC: Cannot allocate memory for forcing offline\n");
683 return -ENOMEM;
684 }
685 memset (l.fcmds, 0, count * sizeof(fcp_cmnd));
686 FCND(("Initializing OFFLINE packets\n"))
687 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
688 fc->state = FC_STATE_UNINITED;
689 fcmd = l.fcmds + i;
690 fc->login = fcmd;
691 fc->ls = (void *)&l;
692 fcmd->did = fc->did;
693 fcmd->class = FC_CLASS_OFFLINE;
694 fcmd->proto = PROTO_OFFLINE;
695 fcmd->token = i;
696 fcmd->fc = fc;
697 disable_irq(fc->irq);
698 ret = fc->hw_enque (fc, fc->login);
699 enable_irq(fc->irq);
700 if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
701 }
702
703 l.timer.expires = jiffies + 5 * HZ;
704 add_timer(&l.timer);
705 down(&l.sem);
706 del_timer(&l.timer);
707
708 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
709 fc->ls = NULL;
710 kfree (l.fcmds);
711 return 0;
712}
713
714int fcp_init(fc_channel *fcchain)
715{
716 fc_channel *fc;
717 int count=0;
718 int ret;
719
720 for (fc = fcchain; fc; fc = fc->next) {
721 fc->fcp_register = fcp_register;
722 count++;
723 }
724
725 ret = fcp_initialize (fcchain, count);
726 if (ret)
727 return ret;
728
729 if (!fc_channels)
730 fc_channels = fcchain;
731 else {
732 for (fc = fc_channels; fc->next; fc = fc->next);
733 fc->next = fcchain;
734 }
735 return ret;
736}
737
738void fcp_release(fc_channel *fcchain, int count) /* count must > 0 */
739{
740 fc_channel *fc;
741 fc_channel *fcx;
742
743 for (fc = fcchain; --count && fc->next; fc = fc->next);
744 if (count) {
745 printk("FC: nothing to release\n");
746 return;
747 }
748
749 if (fc_channels == fcchain)
750 fc_channels = fc->next;
751 else {
752 for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
753 fcx->next = fc->next;
754 }
755 fc->next = NULL;
756
757 /*
758 * We've just grabbed fcchain out of the fc_channel list
759 * and zero-terminated it, while destroying the count.
760 *
761 * Freeing the fc's is the low level driver's responsibility.
762 */
763}
764
765
766static void fcp_scsi_done (Scsi_Cmnd *SCpnt)
767{
768 unsigned long flags;
769
770 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
771 if (FCP_CMND(SCpnt)->done)
772 FCP_CMND(SCpnt)->done(SCpnt);
773 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
774}
775
776static int fcp_scsi_queue_it(fc_channel *fc, Scsi_Cmnd *SCpnt, fcp_cmnd *fcmd, int prepare)
777{
778 long i;
779 fcp_cmd *cmd;
780 u32 fcp_cntl;
781 if (prepare) {
782 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
783 set_bit (i, fc->scsi_bitmap);
784 fcmd->token = i;
785 cmd = fc->scsi_cmd_pool + i;
786
787 if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) {
788 /* Invalid channel/id/lun and couldn't map it into fcp_addr */
789 clear_bit (i, fc->scsi_bitmap);
790 SCpnt->result = (DID_BAD_TARGET << 16);
791 SCpnt->scsi_done(SCpnt);
792 return 0;
793 }
794 fc->scsi_free--;
795 fc->cmd_slots[fcmd->token] = fcmd;
796
797 if (SCpnt->device->tagged_supported) {
798 if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) {
799 fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies;
800 fcp_cntl = FCP_CNTL_QTYPE_ORDERED;
801 } else
802 fcp_cntl = FCP_CNTL_QTYPE_SIMPLE;
803 } else
804 fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED;
805 if (!SCpnt->request_bufflen && !SCpnt->use_sg) {
806 cmd->fcp_cntl = fcp_cntl;
807 fcmd->data = (dma_addr_t)NULL;
808 } else {
809 switch (SCpnt->cmnd[0]) {
810 case WRITE_6:
811 case WRITE_10:
812 case WRITE_12:
813 cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break;
814 default:
815 cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break;
816 }
817 if (!SCpnt->use_sg) {
818 cmd->fcp_data_len = SCpnt->request_bufflen;
819 fcmd->data = dma_map_single (fc->dev, (char *)SCpnt->request_buffer,
820 SCpnt->request_bufflen,
821 SCpnt->sc_data_direction);
822 } else {
823 struct scatterlist *sg = (struct scatterlist *)SCpnt->buffer;
824 int nents;
825
826 FCD(("XXX: Use_sg %d %d\n", SCpnt->use_sg, sg->length))
827 nents = dma_map_sg (fc->dev, sg, SCpnt->use_sg,
828 SCpnt->sc_data_direction);
829 if (nents > 1) printk ("%s: SG for nents %d (use_sg %d) not handled yet\n", fc->name, nents, SCpnt->use_sg);
830 fcmd->data = sg_dma_address(sg);
831 cmd->fcp_data_len = sg_dma_len(sg);
832 }
833 }
834 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
835 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
836 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)))
837 }
838 FCD(("Trying to enque %p\n", fcmd))
839 if (!fc->scsi_que) {
840 if (!fc->hw_enque (fc, fcmd)) {
841 FCD(("hw_enque succeeded for %p\n", fcmd))
842 return 0;
843 }
844 }
845 FCD(("Putting into que1 %p\n", fcmd))
846 fcp_scsi_insert_queue (fc, fcmd);
847 return 0;
848}
849
850int fcp_scsi_queuecommand(Scsi_Cmnd *SCpnt, void (* done)(Scsi_Cmnd *))
851{
852 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
853 fc_channel *fc = FC_SCMND(SCpnt);
854
855 FCD(("Entering SCSI queuecommand %p\n", fcmd))
856 if (SCpnt->done != fcp_scsi_done) {
857 fcmd->done = SCpnt->done;
858 SCpnt->done = fcp_scsi_done;
859 SCpnt->scsi_done = done;
860 fcmd->proto = TYPE_SCSI_FCP;
861 if (!fc->scsi_free) {
862 FCD(("FC: !scsi_free, putting cmd on ML queue\n"))
863#if (FCP_SCSI_USE_NEW_EH_CODE == 0)
864 printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n");
865#endif
866 return 1;
867 }
868 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1);
869 }
870 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0);
871}
872
873void fcp_queue_empty(fc_channel *fc)
874{
875 fcp_cmnd *fcmd;
876
877 FCD(("Queue empty\n"))
878 while ((fcmd = fc->scsi_que)) {
879 /* The hw told us we can try again queue some packet */
880 if (fc->hw_enque (fc, fcmd))
881 break;
882 fcp_scsi_remove_queue (fc, fcmd);
883 }
884}
885
886int fcp_scsi_abort(Scsi_Cmnd *SCpnt)
887{
888 /* Internal bookkeeping only. Lose 1 cmd_slots slot. */
889 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
890 fc_channel *fc = FC_SCMND(SCpnt);
891
892 /*
893 * We react to abort requests by simply forgetting
894 * about the command and pretending everything's sweet.
895 * This may or may not be silly. We can't, however,
896 * immediately reuse the command's cmd_slots slot,
897 * as its result may arrive later and we cannot
898 * check whether it is the aborted one, can't we?
899 *
900 * Therefore, after the first few aborts are done,
901 * we tell the scsi error handler to do something clever.
902 * It will eventually call host reset, refreshing
903 * cmd_slots for us.
904 *
905 * There is a theoretical chance that we sometimes allow
906 * more than can_queue packets to the jungle this way,
907 * but the worst outcome possible is a series of
908 * more aborts and eventually the dev_reset catharsis.
909 */
910
911 if (++fc->abort_count < (fc->can_queue >> 1)) {
912 unsigned long flags;
913
914 SCpnt->result = DID_ABORT;
915 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
916 fcmd->done(SCpnt);
917 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
918 printk("FC: soft abort\n");
919 return SUCCESS;
920 } else {
921 printk("FC: hard abort refused\n");
922 return FAILED;
923 }
924}
925
926void 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->device->host->eh_action);
932}
933
934#define FCP_RESET_TIMEOUT (2*HZ)
935
936int 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->device = SCpnt->device;
955 fc->rst_pkt->cmd_len = 0;
956
957 fc->cmd_slots[0] = fcmd;
958
959 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
960 fcmd->data = (dma_addr_t)NULL;
961 fcmd->proto = TYPE_SCSI_FCP;
962
963 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
964 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
965 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)))
966 } else {
967 fcmd = FCP_CMND(fc->rst_pkt);
968 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
969 return FAILED; /* or SUCCESS. Only these */
970 }
971 fc->rst_pkt->done = NULL;
972
973
974 fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
975 init_timer(&fc->rst_pkt->eh_timeout);
976 fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
977 fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
978 fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
979
980 add_timer(&fc->rst_pkt->eh_timeout);
981
982 /*
983 * Set up the semaphore so we wait for the command to complete.
984 */
985
986 fc->rst_pkt->device->host->eh_action = &sem;
987 fc->rst_pkt->request->rq_status = RQ_SCSI_BUSY;
988
989 fc->rst_pkt->done = fcp_scsi_reset_done;
990 fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
991
992 down(&sem);
993
994 fc->rst_pkt->device->host->eh_action = NULL;
995 del_timer(&fc->rst_pkt->eh_timeout);
996
997 /*
998 * See if timeout. If so, tell the host to forget about it.
999 * In other words, we don't want a callback any more.
1000 */
1001 if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
1002 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1003 return FAILED;
1004 }
1005 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1006 return SUCCESS;
1007}
1008
1009int fcp_scsi_bus_reset(Scsi_Cmnd *SCpnt)
1010{
1011 printk ("FC: bus reset!\n");
1012 return FAILED;
1013}
1014
1015int fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1016{
1017 fc_channel *fc = FC_SCMND(SCpnt);
1018 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
1019 int i;
1020
1021 printk ("FC: host reset\n");
1022
1023 for (i=0; i < fc->can_queue; i++) {
1024 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1025 SCpnt->result = DID_RESET;
1026 fcmd->done(SCpnt);
1027 fc->cmd_slots[i] = NULL;
1028 }
1029 }
1030 fc->reset(fc);
1031 fc->abort_count = 0;
1032 if (fcp_initialize(fc, 1)) return SUCCESS;
1033 else return FAILED;
1034}
1035
1036static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1037{
1038 long i;
1039
1040 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1041 set_bit (i, fc->scsi_bitmap);
1042 fcmd->token = i;
1043 fc->scsi_free--;
1044 fc->cmd_slots[fcmd->token] = fcmd;
1045 return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1046}
1047
1048static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1049{
1050 fcp_cmnd _fcmd, *fcmd;
1051 fc_hdr *fch;
1052 lse l;
1053 int i;
1054
1055 fcmd = &_fcmd;
1056 memset(fcmd, 0, sizeof(fcmd));
1057 FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1058 fch = &fcmd->fch;
1059 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1060 FILL_FCHDR_SID(fch, fc->sid);
1061 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1062 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1063 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1064 fch->param = 0;
1065 fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL);
1066 fcmd->rsp = fcmd->cmd + len;
1067 fcmd->cmdlen = len;
1068 fcmd->rsplen = len;
1069 fcmd->data = (dma_addr_t)NULL;
1070 fcmd->fc = fc;
1071 fcmd->class = FC_CLASS_SIMPLE;
1072 fcmd->proto = TYPE_EXTENDED_LS;
1073
1074 memset (&l, 0, sizeof(lse));
1075 l.magic = LSEMAGIC;
1076 init_MUTEX_LOCKED(&l.sem);
1077 l.timer.function = fcp_login_timeout;
1078 l.timer.data = (unsigned long)&l;
1079 l.status = FC_STATUS_TIMED_OUT;
1080 fcmd->ls = (void *)&l;
1081
1082 disable_irq(fc->irq);
1083 fcp_els_queue_it(fc, fcmd);
1084 enable_irq(fc->irq);
1085
1086 for (i = 0;;) {
1087 l.timer.expires = jiffies + 5 * HZ;
1088 add_timer(&l.timer);
1089 down(&l.sem);
1090 del_timer(&l.timer);
1091 if (l.status != FC_STATUS_TIMED_OUT) break;
1092 if (++i == 3) break;
1093 disable_irq(fc->irq);
1094 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1095 enable_irq(fc->irq);
1096 }
1097
1098 clear_bit(fcmd->token, fc->scsi_bitmap);
1099 fc->scsi_free++;
1100 dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL);
1101 return l.status;
1102}
1103
1104int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1105{
1106 logi *l;
1107 int status;
1108
1109 l = (logi *)kmalloc(2 * sizeof(logi), GFP_KERNEL);
1110 if (!l) return -ENOMEM;
1111 memset(l, 0, 2 * sizeof(logi));
1112 l->code = LS_PLOGI;
1113 memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1114 memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1115 memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1116 memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1117 status = fc_do_els(fc, alpa, l, sizeof(logi));
1118 if (status == FC_STATUS_OK) {
1119 if (l[1].code == LS_ACC) {
1120#ifdef FCDEBUG
1121 u32 *u = (u32 *)&l[1].nport_wwn;
1122 FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1123 u[0], u[1], u[2], u[3]))
1124#endif
1125 memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1126 memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1127 } else
1128 status = FC_STATUS_BAD_RSP;
1129 }
1130 kfree(l);
1131 return status;
1132}
1133
1134typedef struct {
1135 unsigned int code;
1136 unsigned params[4];
1137} prli;
1138
1139int fc_do_prli(fc_channel *fc, unsigned char alpa)
1140{
1141 prli *p;
1142 int status;
1143
1144 p = (prli *)kmalloc(2 * sizeof(prli), GFP_KERNEL);
1145 if (!p) return -ENOMEM;
1146 memset(p, 0, 2 * sizeof(prli));
1147 p->code = LS_PRLI;
1148 p->params[0] = 0x08002000;
1149 p->params[3] = 0x00000022;
1150 status = fc_do_els(fc, alpa, p, sizeof(prli));
1151 if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1152 status = FC_STATUS_BAD_RSP;
1153 kfree(p);
1154 return status;
1155}
1156
1157MODULE_LICENSE("GPL");
1158
Linux 6.x block layer and io_uring tree(s)