1 /* fc.c: Generic Fibre Channel and FC4 SCSI driver.
2 *
3 * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
4 * Copyright (C) 1997,1998 Jirka Hanika (geo@ff.cuni.cz)
5 *
6 * There are two kinds of Fibre Channel adapters used in Linux. Either
7 * the adapter is "smart" and does all FC bookkeeping by itself and
8 * just presents a standard SCSI interface to the operating system
9 * (that's e.g. the case with Qlogic FC cards), or leaves most of the FC
10 * bookkeeping to the OS (e.g. soc, socal). Drivers for the former adapters
11 * will look like normal SCSI drivers (with the exception of max_id will be
12 * usually 127), the latter on the other side allows SCSI, IP over FC and other
13 * protocols. This driver tree is for the latter adapters.
14 *
15 * This file should support both Point-to-Point and Arbitrated Loop topologies.
16 *
17 * Sources:
18 * Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994
19 * dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995
20 * Fibre Channel Arbitrated Loop (FC-AL), Rev. 4.5, 1995
21 * Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), Rev. 2.1, 1997
22 */
23
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/sched.h>
27 #include <linux/types.h>
28 #include <linux/fcntl.h>
29 #include <linux/interrupt.h>
30 #include <linux/ptrace.h>
31 #include <linux/ioport.h>
32 #include <linux/in.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/init.h>
36 #include <linux/blk.h>
37
38 #include <asm/pgtable.h>
39 #include <asm/irq.h>
40 #include <asm/semaphore.h>
41 #include "fcp_impl.h"
42 #include "../scsi/hosts.h"
43
44 /* #define FCDEBUG */
45
46 #define fc_printk printk ("%s: ", fc->name); printk
47
48 #ifdef FCDEBUG
49 #define FCD(x) fc_printk x;
50 #define FCND(x) printk ("FC: "); printk x;
51 #else
52 #define FCD(x)
53 #define FCND(x)
54 #endif
55
56 #ifdef __sparc__
57 #define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p)
58 #define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h)
59 #define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir)
60 #define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir)
61 #define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir)
62 #define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir)
63 #define scsi_to_fc_dma_dir(dir) scsi_to_sbus_dma_dir(dir)
64 #define FC_DMA_BIDIRECTIONAL SBUS_DMA_BIDIRECTIONAL
65 #else
66 #define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p)
67 #define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h)
68 #define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir)
69 #define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir)
70 #define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir)
71 #define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir)
72 #define scsi_to_fc_dma_dir(dir) scsi_to_pci_dma_dir(dir)
73 #define FC_DMA_BIDIRECTIONAL PCI_DMA_BIDIRECTIONAL
74 #endif
75
76 #define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp))
77 #define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->host->hostdata[0]))
78 #define SC_FCMND(fcmnd) ((Scsi_Cmnd *)((long)fcmnd - (long)&(((Scsi_Cmnd *)0)->SCp)))
79
80 static int fcp_scsi_queue_it(fc_channel *, Scsi_Cmnd *, fcp_cmnd *, int);
81 void fcp_queue_empty(fc_channel *);
82
fcp_scsi_insert_queue(fc_channel * fc,fcp_cmnd * fcmd)83 static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd)
84 {
85 if (!fc->scsi_que) {
86 fc->scsi_que = fcmd;
87 fcmd->next = fcmd;
88 fcmd->prev = fcmd;
89 } else {
90 fc->scsi_que->prev->next = fcmd;
91 fcmd->prev = fc->scsi_que->prev;
92 fc->scsi_que->prev = fcmd;
93 fcmd->next = fc->scsi_que;
94 }
95 }
96
fcp_scsi_remove_queue(fc_channel * fc,fcp_cmnd * fcmd)97 static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd)
98 {
99 if (fcmd == fcmd->next) {
100 fc->scsi_que = NULL;
101 return;
102 }
103 if (fcmd == fc->scsi_que)
104 fc->scsi_que = fcmd->next;
105 fcmd->prev->next = fcmd->next;
106 fcmd->next->prev = fcmd->prev;
107 }
108
109 fc_channel *fc_channels = NULL;
110
111 #define LSMAGIC 620829043
112 typedef struct {
113 /* Must be first */
114 struct semaphore sem;
115 int magic;
116 int count;
117 logi *logi;
118 fcp_cmnd *fcmds;
119 atomic_t todo;
120 struct timer_list timer;
121 unsigned char grace[0];
122 } ls;
123
124 #define LSOMAGIC 654907799
125 typedef struct {
126 /* Must be first */
127 struct semaphore sem;
128 int magic;
129 int count;
130 fcp_cmnd *fcmds;
131 atomic_t todo;
132 struct timer_list timer;
133 } lso;
134
135 #define LSEMAGIC 84482456
136 typedef struct {
137 /* Must be first */
138 struct semaphore sem;
139 int magic;
140 int status;
141 struct timer_list timer;
142 } lse;
143
fcp_login_timeout(unsigned long data)144 static void fcp_login_timeout(unsigned long data)
145 {
146 ls *l = (ls *)data;
147 FCND(("Login timeout\n"))
148 up(&l->sem);
149 }
150
fcp_login_done(fc_channel * fc,int i,int status)151 static void fcp_login_done(fc_channel *fc, int i, int status)
152 {
153 fcp_cmnd *fcmd;
154 logi *plogi;
155 fc_hdr *fch;
156 ls *l = (ls *)fc->ls;
157
158 FCD(("Login done %d %d\n", i, status))
159 if (i < l->count) {
160 if (fc->state == FC_STATE_FPORT_OK) {
161 FCD(("Additional FPORT_OK received with status %d\n", status))
162 return;
163 }
164 switch (status) {
165 case FC_STATUS_OK: /* Oh, we found a fabric */
166 case FC_STATUS_P_RJT: /* Oh, we haven't found any */
167 fc->state = FC_STATE_FPORT_OK;
168 fcmd = l->fcmds + i;
169 plogi = l->logi + 3 * i;
170 dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi),
171 FC_DMA_BIDIRECTIONAL);
172 plogi->code = LS_PLOGI;
173 memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
174 memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
175 memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm));
176 memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm));
177 fch = &fcmd->fch;
178 fcmd->token += l->count;
179 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did);
180 FILL_FCHDR_SID(fch, fc->sid);
181 #ifdef FCDEBUG
182 {
183 int i;
184 unsigned *x = (unsigned *)plogi;
185 printk ("logi: ");
186 for (i = 0; i < 21; i++)
187 printk ("%08x ", x[i]);
188 printk ("\n");
189 }
190 #endif
191 fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi),
192 FC_DMA_BIDIRECTIONAL);
193 fcmd->rsp = fcmd->cmd + 2 * sizeof(logi);
194 if (fc->hw_enque (fc, fcmd))
195 printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name);
196 break;
197 case FC_STATUS_ERR_OFFLINE:
198 fc->state = FC_STATE_MAYBEOFFLINE;
199 FCD (("FC is offline %d\n", l->grace[i]))
200 break;
201 default:
202 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
203 /* Do some sort of error recovery here */
204 break;
205 }
206 } else {
207 i -= l->count;
208 if (fc->state != FC_STATE_FPORT_OK) {
209 FCD(("Unexpected N-PORT rsp received"))
210 return;
211 }
212 switch (status) {
213 case FC_STATUS_OK:
214 plogi = l->logi + 3 * i;
215 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
216 FC_DMA_BIDIRECTIONAL);
217 if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) {
218 memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn));
219 FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo))
220 } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo ||
221 fc->wwn_dest.hi != plogi[1].node_wwn.hi) {
222 printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n",
223 fc->name,
224 *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo,
225 *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo);
226 }
227 fc->state = FC_STATE_ONLINE;
228 printk ("%s: ONLINE\n", fc->name);
229 if (atomic_dec_and_test (&l->todo))
230 up(&l->sem);
231 break;
232 case FC_STATUS_ERR_OFFLINE:
233 fc->state = FC_STATE_OFFLINE;
234 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
235 FC_DMA_BIDIRECTIONAL);
236 printk ("%s: FC is offline\n", fc->name);
237 if (atomic_dec_and_test (&l->todo))
238 up(&l->sem);
239 break;
240 default:
241 printk ("PLOGI failed for %s with status %d\n", fc->name, status);
242 /* Do some sort of error recovery here */
243 break;
244 }
245 }
246 }
247
fcp_report_map_done(fc_channel * fc,int i,int status)248 static void fcp_report_map_done(fc_channel *fc, int i, int status)
249 {
250 fcp_cmnd *fcmd;
251 fc_hdr *fch;
252 unsigned char j;
253 ls *l = (ls *)fc->ls;
254 fc_al_posmap *p;
255
256 FCD(("Report map done %d %d\n", i, status))
257 switch (status) {
258 case FC_STATUS_OK: /* Ok, let's have a fun on a loop */
259 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),
260 FC_DMA_BIDIRECTIONAL);
261 p = (fc_al_posmap *)(l->logi + 3 * i);
262 #ifdef FCDEBUG
263 {
264 u32 *u = (u32 *)p;
265 FCD(("%08x\n", u[0]))
266 u ++;
267 FCD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n", u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
268 }
269 #endif
270 if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) {
271 printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic);
272 fc->state = FC_STATE_OFFLINE;
273 } else {
274 fc->posmap = (fcp_posmap *)kmalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL);
275 if (!fc->posmap) {
276 printk("FC: Not enough memory, offlining channel\n");
277 fc->state = FC_STATE_OFFLINE;
278 } else {
279 int k;
280 memset(fc->posmap, 0, sizeof(fcp_posmap)+p->len);
281 /* FIXME: This is where SOCAL transfers our AL-PA.
282 Keep it here till we found out what other cards do... */
283 fc->sid = (p->magic & 0xff);
284 for (i = 0; i < p->len; i++)
285 if (p->alpa[i] == fc->sid)
286 break;
287 k = p->len;
288 if (i == p->len)
289 i = 0;
290 else {
291 p->len--;
292 i++;
293 }
294 fc->posmap->len = p->len;
295 for (j = 0; j < p->len; j++) {
296 if (i == k) i = 0;
297 fc->posmap->list[j] = p->alpa[i++];
298 }
299 fc->state = FC_STATE_ONLINE;
300 }
301 }
302 printk ("%s: ONLINE\n", fc->name);
303 if (atomic_dec_and_test (&l->todo))
304 up(&l->sem);
305 break;
306 case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */
307 FCD(("SID %d DID %d\n", fc->sid, fc->did))
308 fcmd = l->fcmds + i;
309 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi),
310 FC_DMA_BIDIRECTIONAL);
311 fch = &fcmd->fch;
312 memset(l->logi + 3 * i, 0, 3 * sizeof(logi));
313 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
314 FILL_FCHDR_SID(fch, 0);
315 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
316 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
317 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
318 fch->param = 0;
319 l->logi [3 * i].code = LS_FLOGI;
320 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
321 FC_DMA_BIDIRECTIONAL);
322 fcmd->rsp = fcmd->cmd + sizeof(logi);
323 fcmd->cmdlen = sizeof(logi);
324 fcmd->rsplen = sizeof(logi);
325 fcmd->data = (dma_addr_t)NULL;
326 fcmd->class = FC_CLASS_SIMPLE;
327 fcmd->proto = TYPE_EXTENDED_LS;
328 if (fc->hw_enque (fc, fcmd))
329 printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name);
330 break;
331 case FC_STATUS_ERR_OFFLINE:
332 fc->state = FC_STATE_MAYBEOFFLINE;
333 FCD (("FC is offline %d\n", l->grace[i]))
334 break;
335 default:
336 printk ("FLOGI failed for %s with status %d\n", fc->name, status);
337 /* Do some sort of error recovery here */
338 break;
339 }
340 }
341
fcp_register(fc_channel * fc,u8 type,int unregister)342 void fcp_register(fc_channel *fc, u8 type, int unregister)
343 {
344 int size, i;
345 int slots = (fc->can_queue * 3) >> 1;
346
347 FCND(("Going to %sregister\n", unregister ? "un" : ""))
348
349 if (type == TYPE_SCSI_FCP) {
350 if (!unregister) {
351 fc->scsi_cmd_pool = (fcp_cmd *)
352 dma_alloc_consistent (fc->dev,
353 slots * (sizeof (fcp_cmd) + fc->rsp_size),
354 &fc->dma_scsi_cmd);
355 fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots);
356 fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd);
357 fc->scsi_bitmap_end = (slots + 63) & ~63;
358 size = fc->scsi_bitmap_end / 8;
359 fc->scsi_bitmap = kmalloc (size, GFP_KERNEL);
360 memset (fc->scsi_bitmap, 0, size);
361 set_bit (0, fc->scsi_bitmap);
362 for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++)
363 set_bit (i, fc->scsi_bitmap);
364 fc->scsi_free = fc->can_queue;
365 fc->cmd_slots = (fcp_cmnd **)kmalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);
366 memset(fc->cmd_slots, 0, slots * sizeof(fcp_cmnd*));
367 fc->abort_count = 0;
368 } else {
369 fc->scsi_name[0] = 0;
370 kfree (fc->scsi_bitmap);
371 kfree (fc->cmd_slots);
372 FCND(("Unregistering\n"));
373 if (fc->rst_pkt) {
374 if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)
375 kfree(fc->rst_pkt);
376 else {
377 /* Can't happen. Some memory would be lost. */
378 printk("FC: Reset in progress. Now?!");
379 }
380 }
381 FCND(("Unregistered\n"));
382 }
383 } else
384 printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
385 }
386
387 static void fcp_scsi_done(Scsi_Cmnd *SCpnt);
388
fcp_scsi_receive(fc_channel * fc,int token,int status,fc_hdr * fch)389 static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)
390 {
391 fcp_cmnd *fcmd;
392 fcp_rsp *rsp;
393 int host_status;
394 Scsi_Cmnd *SCpnt;
395 int sense_len;
396 int rsp_status;
397
398 fcmd = fc->cmd_slots[token];
399 if (!fcmd) return;
400 rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);
401 SCpnt = SC_FCMND(fcmd);
402
403 if (SCpnt->done != fcp_scsi_done)
404 return;
405
406 rsp_status = rsp->fcp_status;
407 FCD(("rsp_status %08x status %08x\n", rsp_status, status))
408 switch (status) {
409 case FC_STATUS_OK:
410 host_status=DID_OK;
411
412 if (rsp_status & FCP_STATUS_RESID) {
413 #ifdef FCDEBUG
414 FCD(("Resid %d\n", rsp->fcp_resid))
415 {
416 fcp_cmd *cmd = fc->scsi_cmd_pool + token;
417 int i;
418
419 printk ("Command ");
420 for (i = 0; i < sizeof(fcp_cmd); i+=4)
421 printk ("%08x ", *(u32 *)(((char *)cmd)+i));
422 printk ("\nResponse ");
423 for (i = 0; i < fc->rsp_size; i+=4)
424 printk ("%08x ", *(u32 *)(((char *)rsp)+i));
425 printk ("\n");
426 }
427 #endif
428 }
429
430 if (rsp_status & FCP_STATUS_SENSE_LEN) {
431 sense_len = rsp->fcp_sense_len;
432 if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);
433 memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);
434 }
435
436 if (fcmd->data) {
437 if (SCpnt->use_sg)
438 dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->buffer, SCpnt->use_sg,
439 scsi_to_fc_dma_dir(SCpnt->sc_data_direction));
440 else
441 dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,
442 scsi_to_fc_dma_dir(SCpnt->sc_data_direction));
443 }
444 break;
445 default:
446 host_status=DID_ERROR; /* FIXME */
447 FCD(("Wrong FC status %d for token %d\n", status, token))
448 break;
449 }
450
451 if (status_byte(rsp_status) == QUEUE_FULL) {
452 printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->channel, SCpnt->target, rsp_status);
453 }
454
455 SCpnt->result = (host_status << 16) | (rsp_status & 0xff);
456 #ifdef FCDEBUG
457 if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",
458 host_status, SCpnt->result);
459 #endif
460 SCpnt->done = fcmd->done;
461 fcmd->done=NULL;
462 clear_bit(token, fc->scsi_bitmap);
463 fc->scsi_free++;
464 FCD(("Calling scsi_done with %08x\n", SCpnt->result))
465 SCpnt->scsi_done(SCpnt);
466 }
467
fcp_receive_solicited(fc_channel * fc,int proto,int token,int status,fc_hdr * fch)468 void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)
469 {
470 int magic;
471 FCD(("receive_solicited %d %d %d\n", proto, token, status))
472 switch (proto) {
473 case TYPE_SCSI_FCP:
474 fcp_scsi_receive(fc, token, status, fch); break;
475 case TYPE_EXTENDED_LS:
476 case PROTO_REPORT_AL_MAP:
477 magic = 0;
478 if (fc->ls)
479 magic = ((ls *)(fc->ls))->magic;
480 if (magic == LSMAGIC) {
481 ls *l = (ls *)fc->ls;
482 int i = (token >= l->count) ? token - l->count : token;
483
484 /* Let's be sure */
485 if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {
486 if (proto == TYPE_EXTENDED_LS)
487 fcp_login_done(fc, token, status);
488 else
489 fcp_report_map_done(fc, token, status);
490 break;
491 }
492 }
493 FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))
494 if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {
495 fcp_cmnd *fcmd;
496
497 fcmd = fc->cmd_slots[token];
498 if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {
499 lse *l = (lse *)fcmd->ls;
500
501 l->status = status;
502 up (&l->sem);
503 }
504 }
505 break;
506 case PROTO_OFFLINE:
507 if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {
508 lso *l = (lso *)fc->ls;
509
510 if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {
511 /* Wow, OFFLINE response arrived :) */
512 FCD(("OFFLINE Response arrived\n"))
513 fc->state = FC_STATE_OFFLINE;
514 if (atomic_dec_and_test (&l->todo))
515 up(&l->sem);
516 }
517 }
518 break;
519
520 default:
521 break;
522 }
523 }
524
fcp_state_change(fc_channel * fc,int state)525 void fcp_state_change(fc_channel *fc, int state)
526 {
527 FCD(("state_change %d %d\n", state, fc->state))
528 if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)
529 fc->state = FC_STATE_UNINITED;
530 else if (state == FC_STATE_ONLINE)
531 printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);
532 else
533 printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);
534 }
535
fcp_initialize(fc_channel * fcchain,int count)536 int fcp_initialize(fc_channel *fcchain, int count)
537 {
538 fc_channel *fc;
539 fcp_cmnd *fcmd;
540 int i, retry, ret;
541 ls *l;
542
543 FCND(("fcp_inititialize %08lx\n", (long)fcp_init))
544 FCND(("fc_channels %08lx\n", (long)fc_channels))
545 FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))
546 l = kmalloc(sizeof (ls) + count, GFP_KERNEL);
547 if (!l) {
548 printk ("FC: Cannot allocate memory for initialization\n");
549 return -ENOMEM;
550 }
551 memset (l, 0, sizeof(ls) + count);
552 l->magic = LSMAGIC;
553 l->count = count;
554 FCND(("FCP Init for %d channels\n", count))
555 init_MUTEX_LOCKED(&l->sem);
556 l->timer.function = fcp_login_timeout;
557 l->timer.data = (unsigned long)l;
558 atomic_set (&l->todo, count);
559 l->logi = kmalloc (count * 3 * sizeof(logi), GFP_KERNEL);
560 l->fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
561 if (!l->logi || !l->fcmds) {
562 if (l->logi) kfree (l->logi);
563 if (l->fcmds) kfree (l->fcmds);
564 kfree (l);
565 printk ("FC: Cannot allocate DMA memory for initialization\n");
566 return -ENOMEM;
567 }
568 memset (l->logi, 0, count * 3 * sizeof(logi));
569 memset (l->fcmds, 0, count * sizeof(fcp_cmnd));
570 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
571 fc->state = FC_STATE_UNINITED;
572 fc->rst_pkt = NULL; /* kmalloc when first used */
573 }
574 /* First try if we are in a AL topology */
575 FCND(("Initializing REPORT_MAP packets\n"))
576 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
577 fcmd = l->fcmds + i;
578 fc->login = fcmd;
579 fc->ls = (void *)l;
580 /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */
581 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),
582 FC_DMA_BIDIRECTIONAL);
583 fcmd->proto = PROTO_REPORT_AL_MAP;
584 fcmd->token = i;
585 fcmd->fc = fc;
586 }
587 for (retry = 0; retry < 8; retry++) {
588 int nqueued = 0;
589 FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))
590 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
591 if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
592 continue;
593 disable_irq(fc->irq);
594 if (fc->state == FC_STATE_MAYBEOFFLINE) {
595 if (!l->grace[i]) {
596 l->grace[i]++;
597 FCD(("Grace\n"))
598 } else {
599 fc->state = FC_STATE_OFFLINE;
600 enable_irq(fc->irq);
601 dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
602 if (atomic_dec_and_test (&l->todo))
603 goto all_done;
604 }
605 }
606 ret = fc->hw_enque (fc, fc->login);
607 enable_irq(fc->irq);
608 if (!ret) {
609 nqueued++;
610 continue;
611 }
612 if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
613 /* Oh yes, this card handles Point-to-Point only, so let's try that. */
614 fc_hdr *fch;
615
616 FCD(("SID %d DID %d\n", fc->sid, fc->did))
617 fcmd = l->fcmds + i;
618 dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
619 fch = &fcmd->fch;
620 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);
621 FILL_FCHDR_SID(fch, 0);
622 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
623 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
624 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
625 fch->param = 0;
626 l->logi [3 * i].code = LS_FLOGI;
627 fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
628 fcmd->rsp = fcmd->cmd + sizeof(logi);
629 fcmd->cmdlen = sizeof(logi);
630 fcmd->rsplen = sizeof(logi);
631 fcmd->data = (dma_addr_t)NULL;
632 fcmd->class = FC_CLASS_SIMPLE;
633 fcmd->proto = TYPE_EXTENDED_LS;
634 } else
635 printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
636 }
637
638 if (nqueued) {
639 l->timer.expires = jiffies + 5 * HZ;
640 add_timer(&l->timer);
641
642 down(&l->sem);
643 if (!atomic_read(&l->todo)) {
644 FCND(("All channels answered in time\n"))
645 break; /* All fc channels have answered us */
646 }
647 }
648 }
649 all_done:
650 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
651 fc->ls = NULL;
652 switch (fc->state) {
653 case FC_STATE_ONLINE: break;
654 case FC_STATE_OFFLINE: break;
655 default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), FC_DMA_BIDIRECTIONAL);
656 break;
657 }
658 }
659 del_timer(&l->timer);
660 kfree (l->logi);
661 kfree (l->fcmds);
662 kfree (l);
663 return 0;
664 }
665
fcp_forceoffline(fc_channel * fcchain,int count)666 int fcp_forceoffline(fc_channel *fcchain, int count)
667 {
668 fc_channel *fc;
669 fcp_cmnd *fcmd;
670 int i, ret;
671 lso l;
672
673 memset (&l, 0, sizeof(lso));
674 l.count = count;
675 l.magic = LSOMAGIC;
676 FCND(("FCP Force Offline for %d channels\n", count))
677 init_MUTEX_LOCKED(&l.sem);
678 l.timer.function = fcp_login_timeout;
679 l.timer.data = (unsigned long)&l;
680 atomic_set (&l.todo, count);
681 l.fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
682 if (!l.fcmds) {
683 kfree (l.fcmds);
684 printk ("FC: Cannot allocate memory for forcing offline\n");
685 return -ENOMEM;
686 }
687 memset (l.fcmds, 0, count * sizeof(fcp_cmnd));
688 FCND(("Initializing OFFLINE packets\n"))
689 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
690 fc->state = FC_STATE_UNINITED;
691 fcmd = l.fcmds + i;
692 fc->login = fcmd;
693 fc->ls = (void *)&l;
694 fcmd->did = fc->did;
695 fcmd->class = FC_CLASS_OFFLINE;
696 fcmd->proto = PROTO_OFFLINE;
697 fcmd->token = i;
698 fcmd->fc = fc;
699 disable_irq(fc->irq);
700 ret = fc->hw_enque (fc, fc->login);
701 enable_irq(fc->irq);
702 if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
703 }
704
705 l.timer.expires = jiffies + 5 * HZ;
706 add_timer(&l.timer);
707 down(&l.sem);
708 del_timer(&l.timer);
709
710 for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
711 fc->ls = NULL;
712 kfree (l.fcmds);
713 return 0;
714 }
715
fcp_init(fc_channel * fcchain)716 int fcp_init(fc_channel *fcchain)
717 {
718 fc_channel *fc;
719 int count=0;
720 int ret;
721
722 for (fc = fcchain; fc; fc = fc->next) {
723 fc->fcp_register = fcp_register;
724 count++;
725 }
726
727 ret = fcp_initialize (fcchain, count);
728 if (ret)
729 return ret;
730
731 if (!fc_channels)
732 fc_channels = fcchain;
733 else {
734 for (fc = fc_channels; fc->next; fc = fc->next);
735 fc->next = fcchain;
736 }
737 return ret;
738 }
739
fcp_release(fc_channel * fcchain,int count)740 void fcp_release(fc_channel *fcchain, int count) /* count must > 0 */
741 {
742 fc_channel *fc;
743 fc_channel *fcx;
744
745 for (fc = fcchain; --count && fc->next; fc = fc->next);
746 if (count) {
747 printk("FC: nothing to release\n");
748 return;
749 }
750
751 if (fc_channels == fcchain)
752 fc_channels = fc->next;
753 else {
754 for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
755 fcx->next = fc->next;
756 }
757 fc->next = NULL;
758
759 /*
760 * We've just grabbed fcchain out of the fc_channel list
761 * and zero-terminated it, while destroying the count.
762 *
763 * Freeing the fc's is the low level driver's responsibility.
764 */
765 }
766
767
fcp_scsi_done(Scsi_Cmnd * SCpnt)768 static void fcp_scsi_done (Scsi_Cmnd *SCpnt)
769 {
770 if (FCP_CMND(SCpnt)->done)
771 FCP_CMND(SCpnt)->done(SCpnt);
772 }
773
fcp_scsi_queue_it(fc_channel * fc,Scsi_Cmnd * SCpnt,fcp_cmnd * fcmd,int prepare)774 static int fcp_scsi_queue_it(fc_channel *fc, Scsi_Cmnd *SCpnt, fcp_cmnd *fcmd, int prepare)
775 {
776 long i;
777 fcp_cmd *cmd;
778 u32 fcp_cntl;
779 if (prepare) {
780 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
781 set_bit (i, fc->scsi_bitmap);
782 fcmd->token = i;
783 cmd = fc->scsi_cmd_pool + i;
784
785 if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) {
786 /* Invalid channel/id/lun and couldn't map it into fcp_addr */
787 clear_bit (i, fc->scsi_bitmap);
788 SCpnt->result = (DID_BAD_TARGET << 16);
789 SCpnt->scsi_done(SCpnt);
790 return 0;
791 }
792 fc->scsi_free--;
793 fc->cmd_slots[fcmd->token] = fcmd;
794
795 if (SCpnt->device->tagged_supported) {
796 if (jiffies - fc->ages[SCpnt->channel * fc->targets + SCpnt->target] > (5 * 60 * HZ)) {
797 fc->ages[SCpnt->channel * fc->targets + SCpnt->target] = jiffies;
798 fcp_cntl = FCP_CNTL_QTYPE_ORDERED;
799 } else
800 fcp_cntl = FCP_CNTL_QTYPE_SIMPLE;
801 } else
802 fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED;
803 if (!SCpnt->request_bufflen && !SCpnt->use_sg) {
804 cmd->fcp_cntl = fcp_cntl;
805 fcmd->data = (dma_addr_t)NULL;
806 } else {
807 switch (SCpnt->cmnd[0]) {
808 case WRITE_6:
809 case WRITE_10:
810 case WRITE_12:
811 cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break;
812 default:
813 cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break;
814 }
815 if (!SCpnt->use_sg) {
816 cmd->fcp_data_len = SCpnt->request_bufflen;
817 fcmd->data = dma_map_single (fc->dev, (char *)SCpnt->request_buffer,
818 SCpnt->request_bufflen,
819 scsi_to_fc_dma_dir(SCpnt->sc_data_direction));
820 } else {
821 struct scatterlist *sg = (struct scatterlist *)SCpnt->buffer;
822 int nents;
823
824 FCD(("XXX: Use_sg %d %d\n", SCpnt->use_sg, sg->length))
825 nents = dma_map_sg (fc->dev, sg, SCpnt->use_sg,
826 scsi_to_fc_dma_dir(SCpnt->sc_data_direction));
827 if (nents > 1) printk ("%s: SG for nents %d (use_sg %d) not handled yet\n", fc->name, nents, SCpnt->use_sg);
828 fcmd->data = sg_dma_address(sg);
829 cmd->fcp_data_len = sg_dma_len(sg);
830 }
831 }
832 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
833 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
834 FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
835 }
836 FCD(("Trying to enque %p\n", fcmd))
837 if (!fc->scsi_que) {
838 if (!fc->hw_enque (fc, fcmd)) {
839 FCD(("hw_enque succeeded for %p\n", fcmd))
840 return 0;
841 }
842 }
843 FCD(("Putting into que1 %p\n", fcmd))
844 fcp_scsi_insert_queue (fc, fcmd);
845 return 0;
846 }
847
fcp_scsi_queuecommand(Scsi_Cmnd * SCpnt,void (* done)(Scsi_Cmnd *))848 int fcp_scsi_queuecommand(Scsi_Cmnd *SCpnt, void (* done)(Scsi_Cmnd *))
849 {
850 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
851 fc_channel *fc = FC_SCMND(SCpnt);
852
853 FCD(("Entering SCSI queuecommand %p\n", fcmd))
854 if (SCpnt->done != fcp_scsi_done) {
855 fcmd->done = SCpnt->done;
856 SCpnt->done = fcp_scsi_done;
857 SCpnt->scsi_done = done;
858 fcmd->proto = TYPE_SCSI_FCP;
859 if (!fc->scsi_free) {
860 FCD(("FC: !scsi_free, putting cmd on ML queue\n"))
861 #if (FCP_SCSI_USE_NEW_EH_CODE == 0)
862 printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n");
863 #endif
864 return 1;
865 }
866 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1);
867 }
868 return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0);
869 }
870
fcp_queue_empty(fc_channel * fc)871 void fcp_queue_empty(fc_channel *fc)
872 {
873 fcp_cmnd *fcmd;
874
875 FCD(("Queue empty\n"))
876 while ((fcmd = fc->scsi_que)) {
877 /* The hw told us we can try again queue some packet */
878 if (fc->hw_enque (fc, fcmd))
879 break;
880 fcp_scsi_remove_queue (fc, fcmd);
881 }
882 }
883
fcp_old_abort(Scsi_Cmnd * SCpnt)884 int fcp_old_abort(Scsi_Cmnd *SCpnt)
885 {
886 printk("FC: Abort not implemented\n");
887 return 1;
888 }
889
fcp_scsi_abort(Scsi_Cmnd * SCpnt)890 int fcp_scsi_abort(Scsi_Cmnd *SCpnt)
891 {
892 /* Internal bookkeeping only. Lose 1 cmd_slots slot. */
893 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
894 fc_channel *fc = FC_SCMND(SCpnt);
895
896 /*
897 * We react to abort requests by simply forgetting
898 * about the command and pretending everything's sweet.
899 * This may or may not be silly. We can't, however,
900 * immediately reuse the command's cmd_slots slot,
901 * as its result may arrive later and we cannot
902 * check whether it is the aborted one, can't we?
903 *
904 * Therefore, after the first few aborts are done,
905 * we tell the scsi error handler to do something clever.
906 * It will eventually call host reset, refreshing
907 * cmd_slots for us.
908 *
909 * There is a theoretical chance that we sometimes allow
910 * more than can_queue packets to the jungle this way,
911 * but the worst outcome possible is a series of
912 * more aborts and eventually the dev_reset catharsis.
913 */
914
915 if (++fc->abort_count < (fc->can_queue >> 1)) {
916 SCpnt->result = DID_ABORT;
917 fcmd->done(SCpnt);
918 printk("FC: soft abort\n");
919 return SUCCESS;
920 } else {
921 printk("FC: hard abort refused\n");
922 return FAILED;
923 }
924 }
925
fcp_scsi_reset_done(Scsi_Cmnd * SCpnt)926 void fcp_scsi_reset_done(Scsi_Cmnd *SCpnt)
927 {
928 fc_channel *fc = FC_SCMND(SCpnt);
929
930 fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
931 up(fc->rst_pkt->host->eh_action);
932 }
933
934 #define FCP_RESET_TIMEOUT (2*HZ)
935
fcp_scsi_dev_reset(Scsi_Cmnd * SCpnt)936 int fcp_scsi_dev_reset(Scsi_Cmnd *SCpnt)
937 {
938 fcp_cmd *cmd;
939 fcp_cmnd *fcmd;
940 fc_channel *fc = FC_SCMND(SCpnt);
941 DECLARE_MUTEX_LOCKED(sem);
942
943 if (!fc->rst_pkt) {
944 fc->rst_pkt = (Scsi_Cmnd *) kmalloc(sizeof(SCpnt), GFP_KERNEL);
945 if (!fc->rst_pkt) return FAILED;
946
947 fcmd = FCP_CMND(fc->rst_pkt);
948
949
950 fcmd->token = 0;
951 cmd = fc->scsi_cmd_pool + 0;
952 FCD(("Preparing rst packet\n"))
953 fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
954 fc->rst_pkt->channel = SCpnt->channel;
955 fc->rst_pkt->target = SCpnt->target;
956 fc->rst_pkt->lun = 0;
957 fc->rst_pkt->cmd_len = 0;
958
959 fc->cmd_slots[0] = fcmd;
960
961 cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
962 fcmd->data = (dma_addr_t)NULL;
963 fcmd->proto = TYPE_SCSI_FCP;
964
965 memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
966 memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
967 FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
968 } else {
969 fcmd = FCP_CMND(fc->rst_pkt);
970 if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
971 return FAILED; /* or SUCCESS. Only these */
972 }
973 fc->rst_pkt->done = NULL;
974
975
976 fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
977
978 fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
979 fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
980 fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
981
982 add_timer(&fc->rst_pkt->eh_timeout);
983
984 /*
985 * Set up the semaphore so we wait for the command to complete.
986 */
987
988 fc->rst_pkt->host->eh_action = &sem;
989 fc->rst_pkt->request.rq_status = RQ_SCSI_BUSY;
990
991 fc->rst_pkt->done = fcp_scsi_reset_done;
992 fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
993
994 down(&sem);
995
996 fc->rst_pkt->host->eh_action = NULL;
997 del_timer(&fc->rst_pkt->eh_timeout);
998
999 /*
1000 * See if timeout. If so, tell the host to forget about it.
1001 * In other words, we don't want a callback any more.
1002 */
1003 if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
1004 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1005 return FAILED;
1006 }
1007 fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
1008 return SUCCESS;
1009 }
1010
fcp_scsi_bus_reset(Scsi_Cmnd * SCpnt)1011 int fcp_scsi_bus_reset(Scsi_Cmnd *SCpnt)
1012 {
1013 printk ("FC: bus reset!\n");
1014 return FAILED;
1015 }
1016
fcp_scsi_host_reset(Scsi_Cmnd * SCpnt)1017 int fcp_scsi_host_reset(Scsi_Cmnd *SCpnt)
1018 {
1019 fc_channel *fc = FC_SCMND(SCpnt);
1020 fcp_cmnd *fcmd = FCP_CMND(SCpnt);
1021 int i;
1022
1023 printk ("FC: host reset\n");
1024
1025 for (i=0; i < fc->can_queue; i++) {
1026 if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
1027 SCpnt->result = DID_RESET;
1028 fcmd->done(SCpnt);
1029 fc->cmd_slots[i] = NULL;
1030 }
1031 }
1032 fc->reset(fc);
1033 fc->abort_count = 0;
1034 if (fcp_initialize(fc, 1)) return SUCCESS;
1035 else return FAILED;
1036 }
1037
fcp_els_queue_it(fc_channel * fc,fcp_cmnd * fcmd)1038 static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
1039 {
1040 long i;
1041
1042 i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
1043 set_bit (i, fc->scsi_bitmap);
1044 fcmd->token = i;
1045 fc->scsi_free--;
1046 fc->cmd_slots[fcmd->token] = fcmd;
1047 return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1048 }
1049
fc_do_els(fc_channel * fc,unsigned int alpa,void * data,int len)1050 static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
1051 {
1052 fcp_cmnd _fcmd, *fcmd;
1053 fc_hdr *fch;
1054 lse l;
1055 int i;
1056
1057 fcmd = &_fcmd;
1058 memset(fcmd, 0, sizeof(fcmd));
1059 FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
1060 fch = &fcmd->fch;
1061 FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
1062 FILL_FCHDR_SID(fch, fc->sid);
1063 FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
1064 FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
1065 FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
1066 fch->param = 0;
1067 fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, FC_DMA_BIDIRECTIONAL);
1068 fcmd->rsp = fcmd->cmd + len;
1069 fcmd->cmdlen = len;
1070 fcmd->rsplen = len;
1071 fcmd->data = (dma_addr_t)NULL;
1072 fcmd->fc = fc;
1073 fcmd->class = FC_CLASS_SIMPLE;
1074 fcmd->proto = TYPE_EXTENDED_LS;
1075
1076 memset (&l, 0, sizeof(lse));
1077 l.magic = LSEMAGIC;
1078 init_MUTEX_LOCKED(&l.sem);
1079 l.timer.function = fcp_login_timeout;
1080 l.timer.data = (unsigned long)&l;
1081 l.status = FC_STATUS_TIMED_OUT;
1082 fcmd->ls = (void *)&l;
1083
1084 disable_irq(fc->irq);
1085 fcp_els_queue_it(fc, fcmd);
1086 enable_irq(fc->irq);
1087
1088 for (i = 0;;) {
1089 l.timer.expires = jiffies + 5 * HZ;
1090 add_timer(&l.timer);
1091 down(&l.sem);
1092 del_timer(&l.timer);
1093 if (l.status != FC_STATUS_TIMED_OUT) break;
1094 if (++i == 3) break;
1095 disable_irq(fc->irq);
1096 fcp_scsi_queue_it(fc, NULL, fcmd, 0);
1097 enable_irq(fc->irq);
1098 }
1099
1100 clear_bit(fcmd->token, fc->scsi_bitmap);
1101 fc->scsi_free++;
1102 dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, FC_DMA_BIDIRECTIONAL);
1103 return l.status;
1104 }
1105
fc_do_plogi(fc_channel * fc,unsigned char alpa,fc_wwn * node,fc_wwn * nport)1106 int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
1107 {
1108 logi *l;
1109 int status;
1110
1111 l = (logi *)kmalloc(2 * sizeof(logi), GFP_KERNEL);
1112 if (!l) return -ENOMEM;
1113 memset(l, 0, 2 * sizeof(logi));
1114 l->code = LS_PLOGI;
1115 memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
1116 memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
1117 memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
1118 memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
1119 status = fc_do_els(fc, alpa, l, sizeof(logi));
1120 if (status == FC_STATUS_OK) {
1121 if (l[1].code == LS_ACC) {
1122 #ifdef FCDEBUG
1123 u32 *u = (u32 *)&l[1].nport_wwn;
1124 FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
1125 u[0], u[1], u[2], u[3]))
1126 #endif
1127 memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
1128 memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
1129 } else
1130 status = FC_STATUS_BAD_RSP;
1131 }
1132 kfree(l);
1133 return status;
1134 }
1135
1136 typedef struct {
1137 unsigned int code;
1138 unsigned params[4];
1139 } prli;
1140
fc_do_prli(fc_channel * fc,unsigned char alpa)1141 int fc_do_prli(fc_channel *fc, unsigned char alpa)
1142 {
1143 prli *p;
1144 int status;
1145
1146 p = (prli *)kmalloc(2 * sizeof(prli), GFP_KERNEL);
1147 if (!p) return -ENOMEM;
1148 memset(p, 0, 2 * sizeof(prli));
1149 p->code = LS_PRLI;
1150 p->params[0] = 0x08002000;
1151 p->params[3] = 0x00000022;
1152 status = fc_do_els(fc, alpa, p, sizeof(prli));
1153 if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
1154 status = FC_STATUS_BAD_RSP;
1155 kfree(p);
1156 return status;
1157 }
1158
1159 MODULE_LICENSE("GPL");
1160