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drm/i915: NOMEM->NOSPC
[linux-2.6/mini2440.git] / drivers / scsi / fnic / fnic_scsi.c
blobeabf365028568437be0fbd3acbe81abf9dc932c6
1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18 #include <linux/mempool.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/workqueue.h>
22 #include <linux/pci.h>
23 #include <linux/scatterlist.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/delay.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_cmnd.h>
33 #include <scsi/scsi_tcq.h>
34 #include <scsi/fc/fc_els.h>
35 #include <scsi/fc/fc_fcoe.h>
36 #include <scsi/libfc.h>
37 #include <scsi/fc_frame.h>
38 #include "fnic_io.h"
39 #include "fnic.h"
40
41 const char *fnic_state_str[] = {
42 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
43 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
44 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
45 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
46 };
47
48 static const char *fnic_ioreq_state_str[] = {
49 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
50 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
51 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
52 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
53 };
54
55 static const char *fcpio_status_str[] = {
56 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
57 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
58 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
59 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
60 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
61 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
62 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
63 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
64 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
65 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
66 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
67 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
68 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
69 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
70 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
71 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
72 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
73 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
74 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
75 };
76
77 const char *fnic_state_to_str(unsigned int state)
78 {
79 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
80 return "unknown";
81
82 return fnic_state_str[state];
83 }
84
85 static const char *fnic_ioreq_state_to_str(unsigned int state)
86 {
87 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
88 !fnic_ioreq_state_str[state])
89 return "unknown";
90
91 return fnic_ioreq_state_str[state];
92 }
93
94 static const char *fnic_fcpio_status_to_str(unsigned int status)
95 {
96 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
97 return "unknown";
98
99 return fcpio_status_str[status];
100 }
101
102 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
103
104 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
105 struct scsi_cmnd *sc)
106 {
107 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
108
109 return &fnic->io_req_lock[hash];
110 }
111
112 /*
113 * Unmap the data buffer and sense buffer for an io_req,
114 * also unmap and free the device-private scatter/gather list.
115 */
116 static void fnic_release_ioreq_buf(struct fnic *fnic,
117 struct fnic_io_req *io_req,
118 struct scsi_cmnd *sc)
119 {
120 if (io_req->sgl_list_pa)
121 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
122 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
123 PCI_DMA_TODEVICE);
124 scsi_dma_unmap(sc);
125
126 if (io_req->sgl_cnt)
127 mempool_free(io_req->sgl_list_alloc,
128 fnic->io_sgl_pool[io_req->sgl_type]);
129 if (io_req->sense_buf_pa)
130 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
131 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
132 }
133
134 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
135 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
136 {
137 /* if no Ack received from firmware, then nothing to clean */
138 if (!fnic->fw_ack_recd[0])
139 return 1;
140
141 /*
142 * Update desc_available count based on number of freed descriptors
143 * Account for wraparound
144 */
145 if (wq->to_clean_index <= fnic->fw_ack_index[0])
146 wq->ring.desc_avail += (fnic->fw_ack_index[0]
147 - wq->to_clean_index + 1);
148 else
149 wq->ring.desc_avail += (wq->ring.desc_count
150 - wq->to_clean_index
151 + fnic->fw_ack_index[0] + 1);
152
153 /*
154 * just bump clean index to ack_index+1 accounting for wraparound
155 * this will essentially free up all descriptors between
156 * to_clean_index and fw_ack_index, both inclusive
157 */
158 wq->to_clean_index =
159 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
160
161 /* we have processed the acks received so far */
162 fnic->fw_ack_recd[0] = 0;
163 return 0;
164 }
165
166
167 /*
168 * fnic_fw_reset_handler
169 * Routine to send reset msg to fw
170 */
171 int fnic_fw_reset_handler(struct fnic *fnic)
172 {
173 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
174 int ret = 0;
175 unsigned long flags;
176
177 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
178
179 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
180 free_wq_copy_descs(fnic, wq);
181
182 if (!vnic_wq_copy_desc_avail(wq))
183 ret = -EAGAIN;
184 else
185 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
186
187 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
188
189 if (!ret)
190 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
191 "Issued fw reset\n");
192 else
193 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
194 "Failed to issue fw reset\n");
195 return ret;
196 }
197
198
199 /*
200 * fnic_flogi_reg_handler
201 * Routine to send flogi register msg to fw
202 */
203 int fnic_flogi_reg_handler(struct fnic *fnic)
204 {
205 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
206 u8 gw_mac[ETH_ALEN];
207 int ret = 0;
208 unsigned long flags;
209
210 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
211
212 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
213 free_wq_copy_descs(fnic, wq);
214
215 if (!vnic_wq_copy_desc_avail(wq)) {
216 ret = -EAGAIN;
217 goto flogi_reg_ioreq_end;
218 }
219
220 if (fnic->fcoui_mode)
221 memset(gw_mac, 0xff, ETH_ALEN);
222 else
223 memcpy(gw_mac, fnic->dest_addr, ETH_ALEN);
224
225 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
226 FCPIO_FLOGI_REG_GW_DEST,
227 fnic->s_id,
228 gw_mac);
229
230 flogi_reg_ioreq_end:
231 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
232
233 if (!ret)
234 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
235 "flog reg issued\n");
236
237 return ret;
238 }
239
240 /*
241 * fnic_queue_wq_copy_desc
242 * Routine to enqueue a wq copy desc
243 */
244 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
245 struct vnic_wq_copy *wq,
246 struct fnic_io_req *io_req,
247 struct scsi_cmnd *sc,
248 u32 sg_count)
249 {
250 struct scatterlist *sg;
251 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
252 struct fc_rport_libfc_priv *rp = rport->dd_data;
253 struct host_sg_desc *desc;
254 u8 pri_tag = 0;
255 unsigned int i;
256 unsigned long intr_flags;
257 int flags;
258 u8 exch_flags;
259 struct scsi_lun fc_lun;
260 char msg[2];
261
262 if (sg_count) {
263 BUG_ON(sg_count < 0);
264 BUG_ON(sg_count > FNIC_MAX_SG_DESC_CNT);
265
266 /* For each SGE, create a device desc entry */
267 desc = io_req->sgl_list;
268 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
269 desc->addr = cpu_to_le64(sg_dma_address(sg));
270 desc->len = cpu_to_le32(sg_dma_len(sg));
271 desc->_resvd = 0;
272 desc++;
273 }
274
275 io_req->sgl_list_pa = pci_map_single
276 (fnic->pdev,
277 io_req->sgl_list,
278 sizeof(io_req->sgl_list[0]) * sg_count,
279 PCI_DMA_TODEVICE);
280 }
281
282 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
283 sc->sense_buffer,
284 SCSI_SENSE_BUFFERSIZE,
285 PCI_DMA_FROMDEVICE);
286
287 int_to_scsilun(sc->device->lun, &fc_lun);
288
289 pri_tag = FCPIO_ICMND_PTA_SIMPLE;
290 msg[0] = MSG_SIMPLE_TAG;
291 scsi_populate_tag_msg(sc, msg);
292 if (msg[0] == MSG_ORDERED_TAG)
293 pri_tag = FCPIO_ICMND_PTA_ORDERED;
294
295 /* Enqueue the descriptor in the Copy WQ */
296 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
297
298 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
299 free_wq_copy_descs(fnic, wq);
300
301 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
302 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
303 return SCSI_MLQUEUE_HOST_BUSY;
304 }
305
306 flags = 0;
307 if (sc->sc_data_direction == DMA_FROM_DEVICE)
308 flags = FCPIO_ICMND_RDDATA;
309 else if (sc->sc_data_direction == DMA_TO_DEVICE)
310 flags = FCPIO_ICMND_WRDATA;
311
312 exch_flags = 0;
313 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
314 (rp->flags & FC_RP_FLAGS_RETRY))
315 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
316
317 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
318 0, exch_flags, io_req->sgl_cnt,
319 SCSI_SENSE_BUFFERSIZE,
320 io_req->sgl_list_pa,
321 io_req->sense_buf_pa,
322 0, /* scsi cmd ref, always 0 */
323 pri_tag, /* scsi pri and tag */
324 flags, /* command flags */
325 sc->cmnd, scsi_bufflen(sc),
326 fc_lun.scsi_lun, io_req->port_id,
327 rport->maxframe_size, rp->r_a_tov,
328 rp->e_d_tov);
329
330 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
331 return 0;
332 }
333
334 /*
335 * fnic_queuecommand
336 * Routine to send a scsi cdb
337 * Called with host_lock held and interrupts disabled.
338 */
339 int fnic_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
340 {
341 struct fc_lport *lp;
342 struct fc_rport *rport;
343 struct fnic_io_req *io_req;
344 struct fnic *fnic;
345 struct vnic_wq_copy *wq;
346 int ret;
347 u32 sg_count;
348 unsigned long flags;
349 unsigned long ptr;
350
351 rport = starget_to_rport(scsi_target(sc->device));
352 ret = fc_remote_port_chkready(rport);
353 if (ret) {
354 sc->result = ret;
355 done(sc);
356 return 0;
357 }
358
359 lp = shost_priv(sc->device->host);
360 if (lp->state != LPORT_ST_READY || !(lp->link_up))
361 return SCSI_MLQUEUE_HOST_BUSY;
362
363 /*
364 * Release host lock, use driver resource specific locks from here.
365 * Don't re-enable interrupts in case they were disabled prior to the
366 * caller disabling them.
367 */
368 spin_unlock(lp->host->host_lock);
369
370 /* Get a new io_req for this SCSI IO */
371 fnic = lport_priv(lp);
372
373 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
374 if (!io_req) {
375 ret = SCSI_MLQUEUE_HOST_BUSY;
376 goto out;
377 }
378 memset(io_req, 0, sizeof(*io_req));
379
380 /* Map the data buffer */
381 sg_count = scsi_dma_map(sc);
382 if (sg_count < 0) {
383 mempool_free(io_req, fnic->io_req_pool);
384 goto out;
385 }
386
387 /* Determine the type of scatter/gather list we need */
388 io_req->sgl_cnt = sg_count;
389 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
390 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
391 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
392
393 if (sg_count) {
394 io_req->sgl_list =
395 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
396 GFP_ATOMIC | GFP_DMA);
397 if (!io_req->sgl_list) {
398 ret = SCSI_MLQUEUE_HOST_BUSY;
399 scsi_dma_unmap(sc);
400 mempool_free(io_req, fnic->io_req_pool);
401 goto out;
402 }
403
404 /* Cache sgl list allocated address before alignment */
405 io_req->sgl_list_alloc = io_req->sgl_list;
406 ptr = (unsigned long) io_req->sgl_list;
407 if (ptr % FNIC_SG_DESC_ALIGN) {
408 io_req->sgl_list = (struct host_sg_desc *)
409 (((unsigned long) ptr
410 + FNIC_SG_DESC_ALIGN - 1)
411 & ~(FNIC_SG_DESC_ALIGN - 1));
412 }
413 }
414
415 /* initialize rest of io_req */
416 io_req->port_id = rport->port_id;
417 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
418 CMD_SP(sc) = (char *)io_req;
419 sc->scsi_done = done;
420
421 /* create copy wq desc and enqueue it */
422 wq = &fnic->wq_copy[0];
423 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
424 if (ret) {
425 /*
426 * In case another thread cancelled the request,
427 * refetch the pointer under the lock.
428 */
429 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
430
431 spin_lock_irqsave(io_lock, flags);
432 io_req = (struct fnic_io_req *)CMD_SP(sc);
433 CMD_SP(sc) = NULL;
434 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
435 spin_unlock_irqrestore(io_lock, flags);
436 if (io_req) {
437 fnic_release_ioreq_buf(fnic, io_req, sc);
438 mempool_free(io_req, fnic->io_req_pool);
439 }
440 }
441 out:
442 /* acquire host lock before returning to SCSI */
443 spin_lock(lp->host->host_lock);
444 return ret;
445 }
446
447 /*
448 * fnic_fcpio_fw_reset_cmpl_handler
449 * Routine to handle fw reset completion
450 */
451 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
452 struct fcpio_fw_req *desc)
453 {
454 u8 type;
455 u8 hdr_status;
456 struct fcpio_tag tag;
457 int ret = 0;
458 struct fc_frame *flogi;
459 unsigned long flags;
460
461 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
462
463 /* Clean up all outstanding io requests */
464 fnic_cleanup_io(fnic, SCSI_NO_TAG);
465
466 spin_lock_irqsave(&fnic->fnic_lock, flags);
467
468 flogi = fnic->flogi;
469 fnic->flogi = NULL;
470
471 /* fnic should be in FC_TRANS_ETH_MODE */
472 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
473 /* Check status of reset completion */
474 if (!hdr_status) {
475 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
476 "reset cmpl success\n");
477 /* Ready to send flogi out */
478 fnic->state = FNIC_IN_ETH_MODE;
479 } else {
480 FNIC_SCSI_DBG(KERN_DEBUG,
481 fnic->lport->host,
482 "fnic fw_reset : failed %s\n",
483 fnic_fcpio_status_to_str(hdr_status));
484
485 /*
486 * Unable to change to eth mode, cannot send out flogi
487 * Change state to fc mode, so that subsequent Flogi
488 * requests from libFC will cause more attempts to
489 * reset the firmware. Free the cached flogi
490 */
491 fnic->state = FNIC_IN_FC_MODE;
492 ret = -1;
493 }
494 } else {
495 FNIC_SCSI_DBG(KERN_DEBUG,
496 fnic->lport->host,
497 "Unexpected state %s while processing"
498 " reset cmpl\n", fnic_state_to_str(fnic->state));
499 ret = -1;
500 }
501
502 /* Thread removing device blocks till firmware reset is complete */
503 if (fnic->remove_wait)
504 complete(fnic->remove_wait);
505
506 /*
507 * If fnic is being removed, or fw reset failed
508 * free the flogi frame. Else, send it out
509 */
510 if (fnic->remove_wait || ret) {
511 fnic->flogi_oxid = FC_XID_UNKNOWN;
512 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
513 if (flogi)
514 dev_kfree_skb_irq(fp_skb(flogi));
515 goto reset_cmpl_handler_end;
516 }
517
518 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
519
520 if (flogi)
521 ret = fnic_send_frame(fnic, flogi);
522
523 reset_cmpl_handler_end:
524 return ret;
525 }
526
527 /*
528 * fnic_fcpio_flogi_reg_cmpl_handler
529 * Routine to handle flogi register completion
530 */
531 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
532 struct fcpio_fw_req *desc)
533 {
534 u8 type;
535 u8 hdr_status;
536 struct fcpio_tag tag;
537 int ret = 0;
538 struct fc_frame *flogi_resp = NULL;
539 unsigned long flags;
540 struct sk_buff *skb;
541
542 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
543
544 /* Update fnic state based on status of flogi reg completion */
545 spin_lock_irqsave(&fnic->fnic_lock, flags);
546
547 flogi_resp = fnic->flogi_resp;
548 fnic->flogi_resp = NULL;
549
550 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
551
552 /* Check flogi registration completion status */
553 if (!hdr_status) {
554 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
555 "flog reg succeeded\n");
556 fnic->state = FNIC_IN_FC_MODE;
557 } else {
558 FNIC_SCSI_DBG(KERN_DEBUG,
559 fnic->lport->host,
560 "fnic flogi reg :failed %s\n",
561 fnic_fcpio_status_to_str(hdr_status));
562 fnic->state = FNIC_IN_ETH_MODE;
563 ret = -1;
564 }
565 } else {
566 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
567 "Unexpected fnic state %s while"
568 " processing flogi reg completion\n",
569 fnic_state_to_str(fnic->state));
570 ret = -1;
571 }
572
573 /* Successful flogi reg cmpl, pass frame to LibFC */
574 if (!ret && flogi_resp) {
575 if (fnic->stop_rx_link_events) {
576 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
577 goto reg_cmpl_handler_end;
578 }
579 skb = (struct sk_buff *)flogi_resp;
580 /* Use fr_flags to indicate whether flogi resp or not */
581 fr_flags(flogi_resp) = 1;
582 fr_dev(flogi_resp) = fnic->lport;
583 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
584
585 skb_queue_tail(&fnic->frame_queue, skb);
586 queue_work(fnic_event_queue, &fnic->frame_work);
587
588 } else {
589 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
590 if (flogi_resp)
591 dev_kfree_skb_irq(fp_skb(flogi_resp));
592 }
593
594 reg_cmpl_handler_end:
595 return ret;
596 }
597
598 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
599 u16 request_out)
600 {
601 if (wq->to_clean_index <= wq->to_use_index) {
602 /* out of range, stale request_out index */
603 if (request_out < wq->to_clean_index ||
604 request_out >= wq->to_use_index)
605 return 0;
606 } else {
607 /* out of range, stale request_out index */
608 if (request_out < wq->to_clean_index &&
609 request_out >= wq->to_use_index)
610 return 0;
611 }
612 /* request_out index is in range */
613 return 1;
614 }
615
616
617 /*
618 * Mark that ack received and store the Ack index. If there are multiple
619 * acks received before Tx thread cleans it up, the latest value will be
620 * used which is correct behavior. This state should be in the copy Wq
621 * instead of in the fnic
622 */
623 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
624 unsigned int cq_index,
625 struct fcpio_fw_req *desc)
626 {
627 struct vnic_wq_copy *wq;
628 u16 request_out = desc->u.ack.request_out;
629 unsigned long flags;
630
631 /* mark the ack state */
632 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
633 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
634
635 if (is_ack_index_in_range(wq, request_out)) {
636 fnic->fw_ack_index[0] = request_out;
637 fnic->fw_ack_recd[0] = 1;
638 }
639 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
640 }
641
642 /*
643 * fnic_fcpio_icmnd_cmpl_handler
644 * Routine to handle icmnd completions
645 */
646 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
647 struct fcpio_fw_req *desc)
648 {
649 u8 type;
650 u8 hdr_status;
651 struct fcpio_tag tag;
652 u32 id;
653 u64 xfer_len = 0;
654 struct fcpio_icmnd_cmpl *icmnd_cmpl;
655 struct fnic_io_req *io_req;
656 struct scsi_cmnd *sc;
657 unsigned long flags;
658 spinlock_t *io_lock;
659
660 /* Decode the cmpl description to get the io_req id */
661 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
662 fcpio_tag_id_dec(&tag, &id);
663
664 if (id >= FNIC_MAX_IO_REQ)
665 return;
666
667 sc = scsi_host_find_tag(fnic->lport->host, id);
668 WARN_ON_ONCE(!sc);
669 if (!sc)
670 return;
671
672 io_lock = fnic_io_lock_hash(fnic, sc);
673 spin_lock_irqsave(io_lock, flags);
674 io_req = (struct fnic_io_req *)CMD_SP(sc);
675 WARN_ON_ONCE(!io_req);
676 if (!io_req) {
677 spin_unlock_irqrestore(io_lock, flags);
678 return;
679 }
680
681 /* firmware completed the io */
682 io_req->io_completed = 1;
683
684 /*
685 * if SCSI-ML has already issued abort on this command,
686 * ignore completion of the IO. The abts path will clean it up
687 */
688 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
689 spin_unlock_irqrestore(io_lock, flags);
690 return;
691 }
692
693 /* Mark the IO as complete */
694 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
695
696 icmnd_cmpl = &desc->u.icmnd_cmpl;
697
698 switch (hdr_status) {
699 case FCPIO_SUCCESS:
700 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
701 xfer_len = scsi_bufflen(sc);
702 scsi_set_resid(sc, icmnd_cmpl->residual);
703
704 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
705 xfer_len -= icmnd_cmpl->residual;
706
707 /*
708 * If queue_full, then try to reduce queue depth for all
709 * LUNS on the target. Todo: this should be accompanied
710 * by a periodic queue_depth rampup based on successful
711 * IO completion.
712 */
713 if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
714 struct scsi_device *t_sdev;
715 int qd = 0;
716
717 shost_for_each_device(t_sdev, sc->device->host) {
718 if (t_sdev->id != sc->device->id)
719 continue;
720
721 if (t_sdev->queue_depth > 1) {
722 qd = scsi_track_queue_full
723 (t_sdev,
724 t_sdev->queue_depth - 1);
725 if (qd == -1)
726 qd = t_sdev->host->cmd_per_lun;
727 shost_printk(KERN_INFO,
728 fnic->lport->host,
729 "scsi[%d:%d:%d:%d"
730 "] queue full detected,"
731 "new depth = %d\n",
732 t_sdev->host->host_no,
733 t_sdev->channel,
734 t_sdev->id, t_sdev->lun,
735 t_sdev->queue_depth);
736 }
737 }
738 }
739 break;
740
741 case FCPIO_TIMEOUT: /* request was timed out */
742 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
743 break;
744
745 case FCPIO_ABORTED: /* request was aborted */
746 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
747 break;
748
749 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
750 scsi_set_resid(sc, icmnd_cmpl->residual);
751 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
752 break;
753
754 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
755 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
756 break;
757 case FCPIO_INVALID_HEADER: /* header contains invalid data */
758 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
759 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
760 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
761 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
762 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
763 case FCPIO_FW_ERR: /* request was terminated due fw error */
764 default:
765 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
766 fnic_fcpio_status_to_str(hdr_status));
767 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
768 break;
769 }
770
771 /* Break link with the SCSI command */
772 CMD_SP(sc) = NULL;
773
774 spin_unlock_irqrestore(io_lock, flags);
775
776 fnic_release_ioreq_buf(fnic, io_req, sc);
777
778 mempool_free(io_req, fnic->io_req_pool);
779
780 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
781 fnic->lport->host_stats.fcp_input_requests++;
782 fnic->fcp_input_bytes += xfer_len;
783 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
784 fnic->lport->host_stats.fcp_output_requests++;
785 fnic->fcp_output_bytes += xfer_len;
786 } else
787 fnic->lport->host_stats.fcp_control_requests++;
788
789 /* Call SCSI completion function to complete the IO */
790 if (sc->scsi_done)
791 sc->scsi_done(sc);
792
793 }
794
795 /* fnic_fcpio_itmf_cmpl_handler
796 * Routine to handle itmf completions
797 */
798 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
799 struct fcpio_fw_req *desc)
800 {
801 u8 type;
802 u8 hdr_status;
803 struct fcpio_tag tag;
804 u32 id;
805 struct scsi_cmnd *sc;
806 struct fnic_io_req *io_req;
807 unsigned long flags;
808 spinlock_t *io_lock;
809
810 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
811 fcpio_tag_id_dec(&tag, &id);
812
813 if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
814 return;
815
816 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
817 WARN_ON_ONCE(!sc);
818 if (!sc)
819 return;
820
821 io_lock = fnic_io_lock_hash(fnic, sc);
822 spin_lock_irqsave(io_lock, flags);
823 io_req = (struct fnic_io_req *)CMD_SP(sc);
824 WARN_ON_ONCE(!io_req);
825 if (!io_req) {
826 spin_unlock_irqrestore(io_lock, flags);
827 return;
828 }
829
830 if (id & FNIC_TAG_ABORT) {
831 /* Completion of abort cmd */
832 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
833 /* This is a late completion. Ignore it */
834 spin_unlock_irqrestore(io_lock, flags);
835 return;
836 }
837 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
838 CMD_ABTS_STATUS(sc) = hdr_status;
839
840 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
841 "abts cmpl recd. id %d status %s\n",
842 (int)(id & FNIC_TAG_MASK),
843 fnic_fcpio_status_to_str(hdr_status));
844
845 /*
846 * If scsi_eh thread is blocked waiting for abts to complete,
847 * signal completion to it. IO will be cleaned in the thread
848 * else clean it in this context
849 */
850 if (io_req->abts_done) {
851 complete(io_req->abts_done);
852 spin_unlock_irqrestore(io_lock, flags);
853 } else {
854 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
855 "abts cmpl, completing IO\n");
856 CMD_SP(sc) = NULL;
857 sc->result = (DID_ERROR << 16);
858
859 spin_unlock_irqrestore(io_lock, flags);
860
861 fnic_release_ioreq_buf(fnic, io_req, sc);
862 mempool_free(io_req, fnic->io_req_pool);
863 if (sc->scsi_done)
864 sc->scsi_done(sc);
865 }
866
867 } else if (id & FNIC_TAG_DEV_RST) {
868 /* Completion of device reset */
869 CMD_LR_STATUS(sc) = hdr_status;
870 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
871 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
872 "dev reset cmpl recd. id %d status %s\n",
873 (int)(id & FNIC_TAG_MASK),
874 fnic_fcpio_status_to_str(hdr_status));
875 if (io_req->dr_done)
876 complete(io_req->dr_done);
877 spin_unlock_irqrestore(io_lock, flags);
878
879 } else {
880 shost_printk(KERN_ERR, fnic->lport->host,
881 "Unexpected itmf io state %s tag %x\n",
882 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
883 spin_unlock_irqrestore(io_lock, flags);
884 }
885
886 }
887
888 /*
889 * fnic_fcpio_cmpl_handler
890 * Routine to service the cq for wq_copy
891 */
892 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
893 unsigned int cq_index,
894 struct fcpio_fw_req *desc)
895 {
896 struct fnic *fnic = vnic_dev_priv(vdev);
897 int ret = 0;
898
899 switch (desc->hdr.type) {
900 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
901 fnic_fcpio_ack_handler(fnic, cq_index, desc);
902 break;
903
904 case FCPIO_ICMND_CMPL: /* fw completed a command */
905 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
906 break;
907
908 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
909 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
910 break;
911
912 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
913 ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
914 break;
915
916 case FCPIO_RESET_CMPL: /* fw completed reset */
917 ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
918 break;
919
920 default:
921 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
922 "firmware completion type %d\n",
923 desc->hdr.type);
924 break;
925 }
926
927 return ret;
928 }
929
930 /*
931 * fnic_wq_copy_cmpl_handler
932 * Routine to process wq copy
933 */
934 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
935 {
936 unsigned int wq_work_done = 0;
937 unsigned int i, cq_index;
938 unsigned int cur_work_done;
939
940 for (i = 0; i < fnic->wq_copy_count; i++) {
941 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
942 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
943 fnic_fcpio_cmpl_handler,
944 copy_work_to_do);
945 wq_work_done += cur_work_done;
946 }
947 return wq_work_done;
948 }
949
950 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
951 {
952 unsigned int i;
953 struct fnic_io_req *io_req;
954 unsigned long flags = 0;
955 struct scsi_cmnd *sc;
956 spinlock_t *io_lock;
957
958 for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
959 if (i == exclude_id)
960 continue;
961
962 sc = scsi_host_find_tag(fnic->lport->host, i);
963 if (!sc)
964 continue;
965
966 io_lock = fnic_io_lock_hash(fnic, sc);
967 spin_lock_irqsave(io_lock, flags);
968 io_req = (struct fnic_io_req *)CMD_SP(sc);
969 if (!io_req) {
970 spin_unlock_irqrestore(io_lock, flags);
971 goto cleanup_scsi_cmd;
972 }
973
974 CMD_SP(sc) = NULL;
975
976 spin_unlock_irqrestore(io_lock, flags);
977
978 /*
979 * If there is a scsi_cmnd associated with this io_req, then
980 * free the corresponding state
981 */
982 fnic_release_ioreq_buf(fnic, io_req, sc);
983 mempool_free(io_req, fnic->io_req_pool);
984
985 cleanup_scsi_cmd:
986 sc->result = DID_TRANSPORT_DISRUPTED << 16;
987 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
988 " DID_TRANSPORT_DISRUPTED\n");
989
990 /* Complete the command to SCSI */
991 if (sc->scsi_done)
992 sc->scsi_done(sc);
993 }
994 }
995
996 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
997 struct fcpio_host_req *desc)
998 {
999 u32 id;
1000 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1001 struct fnic_io_req *io_req;
1002 struct scsi_cmnd *sc;
1003 unsigned long flags;
1004 spinlock_t *io_lock;
1005
1006 /* get the tag reference */
1007 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1008 id &= FNIC_TAG_MASK;
1009
1010 if (id >= FNIC_MAX_IO_REQ)
1011 return;
1012
1013 sc = scsi_host_find_tag(fnic->lport->host, id);
1014 if (!sc)
1015 return;
1016
1017 io_lock = fnic_io_lock_hash(fnic, sc);
1018 spin_lock_irqsave(io_lock, flags);
1019
1020 /* Get the IO context which this desc refers to */
1021 io_req = (struct fnic_io_req *)CMD_SP(sc);
1022
1023 /* fnic interrupts are turned off by now */
1024
1025 if (!io_req) {
1026 spin_unlock_irqrestore(io_lock, flags);
1027 goto wq_copy_cleanup_scsi_cmd;
1028 }
1029
1030 CMD_SP(sc) = NULL;
1031
1032 spin_unlock_irqrestore(io_lock, flags);
1033
1034 fnic_release_ioreq_buf(fnic, io_req, sc);
1035 mempool_free(io_req, fnic->io_req_pool);
1036
1037 wq_copy_cleanup_scsi_cmd:
1038 sc->result = DID_NO_CONNECT << 16;
1039 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1040 " DID_NO_CONNECT\n");
1041
1042 if (sc->scsi_done)
1043 sc->scsi_done(sc);
1044 }
1045
1046 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1047 u32 task_req, u8 *fc_lun,
1048 struct fnic_io_req *io_req)
1049 {
1050 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1051 unsigned long flags;
1052
1053 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1054
1055 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1056 free_wq_copy_descs(fnic, wq);
1057
1058 if (!vnic_wq_copy_desc_avail(wq)) {
1059 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1060 return 1;
1061 }
1062 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1063 0, task_req, tag, fc_lun, io_req->port_id,
1064 fnic->config.ra_tov, fnic->config.ed_tov);
1065
1066 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1067 return 0;
1068 }
1069
1070 void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1071 {
1072 int tag;
1073 struct fnic_io_req *io_req;
1074 spinlock_t *io_lock;
1075 unsigned long flags;
1076 struct scsi_cmnd *sc;
1077 struct scsi_lun fc_lun;
1078 enum fnic_ioreq_state old_ioreq_state;
1079
1080 FNIC_SCSI_DBG(KERN_DEBUG,
1081 fnic->lport->host,
1082 "fnic_rport_reset_exch called portid 0x%06x\n",
1083 port_id);
1084
1085 if (fnic->in_remove)
1086 return;
1087
1088 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1089 sc = scsi_host_find_tag(fnic->lport->host, tag);
1090 if (!sc)
1091 continue;
1092
1093 io_lock = fnic_io_lock_hash(fnic, sc);
1094 spin_lock_irqsave(io_lock, flags);
1095
1096 io_req = (struct fnic_io_req *)CMD_SP(sc);
1097
1098 if (!io_req || io_req->port_id != port_id) {
1099 spin_unlock_irqrestore(io_lock, flags);
1100 continue;
1101 }
1102
1103 /*
1104 * Found IO that is still pending with firmware and
1105 * belongs to rport that went away
1106 */
1107 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1108 spin_unlock_irqrestore(io_lock, flags);
1109 continue;
1110 }
1111 old_ioreq_state = CMD_STATE(sc);
1112 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1113 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1114
1115 BUG_ON(io_req->abts_done);
1116
1117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1118 "fnic_rport_reset_exch: Issuing abts\n");
1119
1120 spin_unlock_irqrestore(io_lock, flags);
1121
1122 /* Now queue the abort command to firmware */
1123 int_to_scsilun(sc->device->lun, &fc_lun);
1124
1125 if (fnic_queue_abort_io_req(fnic, tag,
1126 FCPIO_ITMF_ABT_TASK_TERM,
1127 fc_lun.scsi_lun, io_req)) {
1128 /*
1129 * Revert the cmd state back to old state, if
1130 * it hasnt changed in between. This cmd will get
1131 * aborted later by scsi_eh, or cleaned up during
1132 * lun reset
1133 */
1134 io_lock = fnic_io_lock_hash(fnic, sc);
1135
1136 spin_lock_irqsave(io_lock, flags);
1137 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1138 CMD_STATE(sc) = old_ioreq_state;
1139 spin_unlock_irqrestore(io_lock, flags);
1140 }
1141 }
1142
1143 }
1144
1145 void fnic_terminate_rport_io(struct fc_rport *rport)
1146 {
1147 int tag;
1148 struct fnic_io_req *io_req;
1149 spinlock_t *io_lock;
1150 unsigned long flags;
1151 struct scsi_cmnd *sc;
1152 struct scsi_lun fc_lun;
1153 struct fc_rport_libfc_priv *rdata = rport->dd_data;
1154 struct fc_lport *lport = rdata->local_port;
1155 struct fnic *fnic = lport_priv(lport);
1156 struct fc_rport *cmd_rport;
1157 enum fnic_ioreq_state old_ioreq_state;
1158
1159 FNIC_SCSI_DBG(KERN_DEBUG,
1160 fnic->lport->host, "fnic_terminate_rport_io called"
1161 " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
1162 rport->port_name, rport->node_name,
1163 rport->port_id);
1164
1165 if (fnic->in_remove)
1166 return;
1167
1168 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1169 sc = scsi_host_find_tag(fnic->lport->host, tag);
1170 if (!sc)
1171 continue;
1172
1173 cmd_rport = starget_to_rport(scsi_target(sc->device));
1174 if (rport != cmd_rport)
1175 continue;
1176
1177 io_lock = fnic_io_lock_hash(fnic, sc);
1178 spin_lock_irqsave(io_lock, flags);
1179
1180 io_req = (struct fnic_io_req *)CMD_SP(sc);
1181
1182 if (!io_req || rport != cmd_rport) {
1183 spin_unlock_irqrestore(io_lock, flags);
1184 continue;
1185 }
1186
1187 /*
1188 * Found IO that is still pending with firmware and
1189 * belongs to rport that went away
1190 */
1191 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1192 spin_unlock_irqrestore(io_lock, flags);
1193 continue;
1194 }
1195 old_ioreq_state = CMD_STATE(sc);
1196 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1197 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1198
1199 BUG_ON(io_req->abts_done);
1200
1201 FNIC_SCSI_DBG(KERN_DEBUG,
1202 fnic->lport->host,
1203 "fnic_terminate_rport_io: Issuing abts\n");
1204
1205 spin_unlock_irqrestore(io_lock, flags);
1206
1207 /* Now queue the abort command to firmware */
1208 int_to_scsilun(sc->device->lun, &fc_lun);
1209
1210 if (fnic_queue_abort_io_req(fnic, tag,
1211 FCPIO_ITMF_ABT_TASK_TERM,
1212 fc_lun.scsi_lun, io_req)) {
1213 /*
1214 * Revert the cmd state back to old state, if
1215 * it hasnt changed in between. This cmd will get
1216 * aborted later by scsi_eh, or cleaned up during
1217 * lun reset
1218 */
1219 io_lock = fnic_io_lock_hash(fnic, sc);
1220
1221 spin_lock_irqsave(io_lock, flags);
1222 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1223 CMD_STATE(sc) = old_ioreq_state;
1224 spin_unlock_irqrestore(io_lock, flags);
1225 }
1226 }
1227
1228 }
1229
1230 static void fnic_block_error_handler(struct scsi_cmnd *sc)
1231 {
1232 struct Scsi_Host *shost = sc->device->host;
1233 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
1234 unsigned long flags;
1235
1236 spin_lock_irqsave(shost->host_lock, flags);
1237 while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1238 spin_unlock_irqrestore(shost->host_lock, flags);
1239 msleep(1000);
1240 spin_lock_irqsave(shost->host_lock, flags);
1241 }
1242 spin_unlock_irqrestore(shost->host_lock, flags);
1243
1244 }
1245
1246 /*
1247 * This function is exported to SCSI for sending abort cmnds.
1248 * A SCSI IO is represented by a io_req in the driver.
1249 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1250 */
1251 int fnic_abort_cmd(struct scsi_cmnd *sc)
1252 {
1253 struct fc_lport *lp;
1254 struct fnic *fnic;
1255 struct fnic_io_req *io_req;
1256 struct fc_rport *rport;
1257 spinlock_t *io_lock;
1258 unsigned long flags;
1259 int ret = SUCCESS;
1260 u32 task_req;
1261 struct scsi_lun fc_lun;
1262 DECLARE_COMPLETION_ONSTACK(tm_done);
1263
1264 /* Wait for rport to unblock */
1265 fnic_block_error_handler(sc);
1266
1267 /* Get local-port, check ready and link up */
1268 lp = shost_priv(sc->device->host);
1269
1270 fnic = lport_priv(lp);
1271 FNIC_SCSI_DBG(KERN_DEBUG,
1272 fnic->lport->host,
1273 "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
1274 (starget_to_rport(scsi_target(sc->device)))->port_id,
1275 sc->device->lun, sc->request->tag);
1276
1277 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1278 ret = FAILED;
1279 goto fnic_abort_cmd_end;
1280 }
1281
1282 /*
1283 * Avoid a race between SCSI issuing the abort and the device
1284 * completing the command.
1285 *
1286 * If the command is already completed by the fw cmpl code,
1287 * we just return SUCCESS from here. This means that the abort
1288 * succeeded. In the SCSI ML, since the timeout for command has
1289 * happened, the completion wont actually complete the command
1290 * and it will be considered as an aborted command
1291 *
1292 * The CMD_SP will not be cleared except while holding io_req_lock.
1293 */
1294 io_lock = fnic_io_lock_hash(fnic, sc);
1295 spin_lock_irqsave(io_lock, flags);
1296 io_req = (struct fnic_io_req *)CMD_SP(sc);
1297 if (!io_req) {
1298 spin_unlock_irqrestore(io_lock, flags);
1299 goto fnic_abort_cmd_end;
1300 }
1301
1302 io_req->abts_done = &tm_done;
1303
1304 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1305 spin_unlock_irqrestore(io_lock, flags);
1306 goto wait_pending;
1307 }
1308 /*
1309 * Command is still pending, need to abort it
1310 * If the firmware completes the command after this point,
1311 * the completion wont be done till mid-layer, since abort
1312 * has already started.
1313 */
1314 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1315 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1316
1317 spin_unlock_irqrestore(io_lock, flags);
1318
1319 /*
1320 * Check readiness of the remote port. If the path to remote
1321 * port is up, then send abts to the remote port to terminate
1322 * the IO. Else, just locally terminate the IO in the firmware
1323 */
1324 rport = starget_to_rport(scsi_target(sc->device));
1325 if (fc_remote_port_chkready(rport) == 0)
1326 task_req = FCPIO_ITMF_ABT_TASK;
1327 else
1328 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1329
1330 /* Now queue the abort command to firmware */
1331 int_to_scsilun(sc->device->lun, &fc_lun);
1332
1333 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1334 fc_lun.scsi_lun, io_req)) {
1335 spin_lock_irqsave(io_lock, flags);
1336 io_req = (struct fnic_io_req *)CMD_SP(sc);
1337 if (io_req)
1338 io_req->abts_done = NULL;
1339 spin_unlock_irqrestore(io_lock, flags);
1340 ret = FAILED;
1341 goto fnic_abort_cmd_end;
1342 }
1343
1344 /*
1345 * We queued an abort IO, wait for its completion.
1346 * Once the firmware completes the abort command, it will
1347 * wake up this thread.
1348 */
1349 wait_pending:
1350 wait_for_completion_timeout(&tm_done,
1351 msecs_to_jiffies
1352 (2 * fnic->config.ra_tov +
1353 fnic->config.ed_tov));
1354
1355 /* Check the abort status */
1356 spin_lock_irqsave(io_lock, flags);
1357
1358 io_req = (struct fnic_io_req *)CMD_SP(sc);
1359 if (!io_req) {
1360 spin_unlock_irqrestore(io_lock, flags);
1361 ret = FAILED;
1362 goto fnic_abort_cmd_end;
1363 }
1364 io_req->abts_done = NULL;
1365
1366 /* fw did not complete abort, timed out */
1367 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1368 spin_unlock_irqrestore(io_lock, flags);
1369 ret = FAILED;
1370 goto fnic_abort_cmd_end;
1371 }
1372
1373 /*
1374 * firmware completed the abort, check the status,
1375 * free the io_req irrespective of failure or success
1376 */
1377 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1378 ret = FAILED;
1379
1380 CMD_SP(sc) = NULL;
1381
1382 spin_unlock_irqrestore(io_lock, flags);
1383
1384 fnic_release_ioreq_buf(fnic, io_req, sc);
1385 mempool_free(io_req, fnic->io_req_pool);
1386
1387 fnic_abort_cmd_end:
1388 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1389 "Returning from abort cmd %s\n",
1390 (ret == SUCCESS) ?
1391 "SUCCESS" : "FAILED");
1392 return ret;
1393 }
1394
1395 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1396 struct scsi_cmnd *sc,
1397 struct fnic_io_req *io_req)
1398 {
1399 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1400 struct scsi_lun fc_lun;
1401 int ret = 0;
1402 unsigned long intr_flags;
1403
1404 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1405
1406 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1407 free_wq_copy_descs(fnic, wq);
1408
1409 if (!vnic_wq_copy_desc_avail(wq)) {
1410 ret = -EAGAIN;
1411 goto lr_io_req_end;
1412 }
1413
1414 /* fill in the lun info */
1415 int_to_scsilun(sc->device->lun, &fc_lun);
1416
1417 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1418 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1419 fc_lun.scsi_lun, io_req->port_id,
1420 fnic->config.ra_tov, fnic->config.ed_tov);
1421
1422 lr_io_req_end:
1423 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1424
1425 return ret;
1426 }
1427
1428 /*
1429 * Clean up any pending aborts on the lun
1430 * For each outstanding IO on this lun, whose abort is not completed by fw,
1431 * issue a local abort. Wait for abort to complete. Return 0 if all commands
1432 * successfully aborted, 1 otherwise
1433 */
1434 static int fnic_clean_pending_aborts(struct fnic *fnic,
1435 struct scsi_cmnd *lr_sc)
1436 {
1437 int tag;
1438 struct fnic_io_req *io_req;
1439 spinlock_t *io_lock;
1440 unsigned long flags;
1441 int ret = 0;
1442 struct scsi_cmnd *sc;
1443 struct fc_rport *rport;
1444 struct scsi_lun fc_lun;
1445 struct scsi_device *lun_dev = lr_sc->device;
1446 DECLARE_COMPLETION_ONSTACK(tm_done);
1447
1448 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1449 sc = scsi_host_find_tag(fnic->lport->host, tag);
1450 /*
1451 * ignore this lun reset cmd or cmds that do not belong to
1452 * this lun
1453 */
1454 if (!sc || sc == lr_sc || sc->device != lun_dev)
1455 continue;
1456
1457 io_lock = fnic_io_lock_hash(fnic, sc);
1458 spin_lock_irqsave(io_lock, flags);
1459
1460 io_req = (struct fnic_io_req *)CMD_SP(sc);
1461
1462 if (!io_req || sc->device != lun_dev) {
1463 spin_unlock_irqrestore(io_lock, flags);
1464 continue;
1465 }
1466
1467 /*
1468 * Found IO that is still pending with firmware and
1469 * belongs to the LUN that we are resetting
1470 */
1471 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1472 "Found IO in %s on lun\n",
1473 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1474
1475 BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
1476
1477 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1478 io_req->abts_done = &tm_done;
1479 spin_unlock_irqrestore(io_lock, flags);
1480
1481 /* Now queue the abort command to firmware */
1482 int_to_scsilun(sc->device->lun, &fc_lun);
1483 rport = starget_to_rport(scsi_target(sc->device));
1484
1485 if (fnic_queue_abort_io_req(fnic, tag,
1486 FCPIO_ITMF_ABT_TASK_TERM,
1487 fc_lun.scsi_lun, io_req)) {
1488 spin_lock_irqsave(io_lock, flags);
1489 io_req = (struct fnic_io_req *)CMD_SP(sc);
1490 if (io_req)
1491 io_req->abts_done = NULL;
1492 spin_unlock_irqrestore(io_lock, flags);
1493 ret = 1;
1494 goto clean_pending_aborts_end;
1495 }
1496
1497 wait_for_completion_timeout(&tm_done,
1498 msecs_to_jiffies
1499 (fnic->config.ed_tov));
1500
1501 /* Recheck cmd state to check if it is now aborted */
1502 spin_lock_irqsave(io_lock, flags);
1503 io_req = (struct fnic_io_req *)CMD_SP(sc);
1504 if (!io_req) {
1505 spin_unlock_irqrestore(io_lock, flags);
1506 ret = 1;
1507 goto clean_pending_aborts_end;
1508 }
1509
1510 io_req->abts_done = NULL;
1511
1512 /* if abort is still pending with fw, fail */
1513 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1514 spin_unlock_irqrestore(io_lock, flags);
1515 ret = 1;
1516 goto clean_pending_aborts_end;
1517 }
1518 CMD_SP(sc) = NULL;
1519 spin_unlock_irqrestore(io_lock, flags);
1520
1521 fnic_release_ioreq_buf(fnic, io_req, sc);
1522 mempool_free(io_req, fnic->io_req_pool);
1523 }
1524
1525 clean_pending_aborts_end:
1526 return ret;
1527 }
1528
1529 /*
1530 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1531 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1532 * on the LUN.
1533 */
1534 int fnic_device_reset(struct scsi_cmnd *sc)
1535 {
1536 struct fc_lport *lp;
1537 struct fnic *fnic;
1538 struct fnic_io_req *io_req;
1539 struct fc_rport *rport;
1540 int status;
1541 int ret = FAILED;
1542 spinlock_t *io_lock;
1543 unsigned long flags;
1544 DECLARE_COMPLETION_ONSTACK(tm_done);
1545
1546 /* Wait for rport to unblock */
1547 fnic_block_error_handler(sc);
1548
1549 /* Get local-port, check ready and link up */
1550 lp = shost_priv(sc->device->host);
1551
1552 fnic = lport_priv(lp);
1553 FNIC_SCSI_DBG(KERN_DEBUG,
1554 fnic->lport->host,
1555 "Device reset called FCID 0x%x, LUN 0x%x\n",
1556 (starget_to_rport(scsi_target(sc->device)))->port_id,
1557 sc->device->lun);
1558
1559
1560 if (lp->state != LPORT_ST_READY || !(lp->link_up))
1561 goto fnic_device_reset_end;
1562
1563 /* Check if remote port up */
1564 rport = starget_to_rport(scsi_target(sc->device));
1565 if (fc_remote_port_chkready(rport))
1566 goto fnic_device_reset_end;
1567
1568 io_lock = fnic_io_lock_hash(fnic, sc);
1569 spin_lock_irqsave(io_lock, flags);
1570 io_req = (struct fnic_io_req *)CMD_SP(sc);
1571
1572 /*
1573 * If there is a io_req attached to this command, then use it,
1574 * else allocate a new one.
1575 */
1576 if (!io_req) {
1577 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
1578 if (!io_req) {
1579 spin_unlock_irqrestore(io_lock, flags);
1580 goto fnic_device_reset_end;
1581 }
1582 memset(io_req, 0, sizeof(*io_req));
1583 io_req->port_id = rport->port_id;
1584 CMD_SP(sc) = (char *)io_req;
1585 }
1586 io_req->dr_done = &tm_done;
1587 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
1588 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
1589 spin_unlock_irqrestore(io_lock, flags);
1590
1591 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
1592 sc->request->tag);
1593
1594 /*
1595 * issue the device reset, if enqueue failed, clean up the ioreq
1596 * and break assoc with scsi cmd
1597 */
1598 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
1599 spin_lock_irqsave(io_lock, flags);
1600 io_req = (struct fnic_io_req *)CMD_SP(sc);
1601 if (io_req)
1602 io_req->dr_done = NULL;
1603 goto fnic_device_reset_clean;
1604 }
1605
1606 /*
1607 * Wait on the local completion for LUN reset. The io_req may be
1608 * freed while we wait since we hold no lock.
1609 */
1610 wait_for_completion_timeout(&tm_done,
1611 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
1612
1613 spin_lock_irqsave(io_lock, flags);
1614 io_req = (struct fnic_io_req *)CMD_SP(sc);
1615 if (!io_req) {
1616 spin_unlock_irqrestore(io_lock, flags);
1617 goto fnic_device_reset_end;
1618 }
1619 io_req->dr_done = NULL;
1620
1621 status = CMD_LR_STATUS(sc);
1622 spin_unlock_irqrestore(io_lock, flags);
1623
1624 /*
1625 * If lun reset not completed, bail out with failed. io_req
1626 * gets cleaned up during higher levels of EH
1627 */
1628 if (status == FCPIO_INVALID_CODE) {
1629 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1630 "Device reset timed out\n");
1631 goto fnic_device_reset_end;
1632 }
1633
1634 /* Completed, but not successful, clean up the io_req, return fail */
1635 if (status != FCPIO_SUCCESS) {
1636 spin_lock_irqsave(io_lock, flags);
1637 FNIC_SCSI_DBG(KERN_DEBUG,
1638 fnic->lport->host,
1639 "Device reset completed - failed\n");
1640 io_req = (struct fnic_io_req *)CMD_SP(sc);
1641 goto fnic_device_reset_clean;
1642 }
1643
1644 /*
1645 * Clean up any aborts on this lun that have still not
1646 * completed. If any of these fail, then LUN reset fails.
1647 * clean_pending_aborts cleans all cmds on this lun except
1648 * the lun reset cmd. If all cmds get cleaned, the lun reset
1649 * succeeds
1650 */
1651 if (fnic_clean_pending_aborts(fnic, sc)) {
1652 spin_lock_irqsave(io_lock, flags);
1653 io_req = (struct fnic_io_req *)CMD_SP(sc);
1654 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1655 "Device reset failed"
1656 " since could not abort all IOs\n");
1657 goto fnic_device_reset_clean;
1658 }
1659
1660 /* Clean lun reset command */
1661 spin_lock_irqsave(io_lock, flags);
1662 io_req = (struct fnic_io_req *)CMD_SP(sc);
1663 if (io_req)
1664 /* Completed, and successful */
1665 ret = SUCCESS;
1666
1667 fnic_device_reset_clean:
1668 if (io_req)
1669 CMD_SP(sc) = NULL;
1670
1671 spin_unlock_irqrestore(io_lock, flags);
1672
1673 if (io_req) {
1674 fnic_release_ioreq_buf(fnic, io_req, sc);
1675 mempool_free(io_req, fnic->io_req_pool);
1676 }
1677
1678 fnic_device_reset_end:
1679 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1680 "Returning from device reset %s\n",
1681 (ret == SUCCESS) ?
1682 "SUCCESS" : "FAILED");
1683 return ret;
1684 }
1685
1686 /* Clean up all IOs, clean up libFC local port */
1687 int fnic_reset(struct Scsi_Host *shost)
1688 {
1689 struct fc_lport *lp;
1690 struct fnic *fnic;
1691 int ret = SUCCESS;
1692
1693 lp = shost_priv(shost);
1694 fnic = lport_priv(lp);
1695
1696 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1697 "fnic_reset called\n");
1698
1699 /*
1700 * Reset local port, this will clean up libFC exchanges,
1701 * reset remote port sessions, and if link is up, begin flogi
1702 */
1703 if (lp->tt.lport_reset(lp))
1704 ret = FAILED;
1705
1706 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1707 "Returning from fnic reset %s\n",
1708 (ret == SUCCESS) ?
1709 "SUCCESS" : "FAILED");
1710
1711 return ret;
1712 }
1713
1714 /*
1715 * SCSI Error handling calls driver's eh_host_reset if all prior
1716 * error handling levels return FAILED. If host reset completes
1717 * successfully, and if link is up, then Fabric login begins.
1718 *
1719 * Host Reset is the highest level of error recovery. If this fails, then
1720 * host is offlined by SCSI.
1721 *
1722 */
1723 int fnic_host_reset(struct scsi_cmnd *sc)
1724 {
1725 int ret;
1726 unsigned long wait_host_tmo;
1727 struct Scsi_Host *shost = sc->device->host;
1728 struct fc_lport *lp = shost_priv(shost);
1729
1730 /*
1731 * If fnic_reset is successful, wait for fabric login to complete
1732 * scsi-ml tries to send a TUR to every device if host reset is
1733 * successful, so before returning to scsi, fabric should be up
1734 */
1735 ret = fnic_reset(shost);
1736 if (ret == SUCCESS) {
1737 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
1738 ret = FAILED;
1739 while (time_before(jiffies, wait_host_tmo)) {
1740 if ((lp->state == LPORT_ST_READY) &&
1741 (lp->link_up)) {
1742 ret = SUCCESS;
1743 break;
1744 }
1745 ssleep(1);
1746 }
1747 }
1748
1749 return ret;
1750 }
1751
1752 /*
1753 * This fxn is called from libFC when host is removed
1754 */
1755 void fnic_scsi_abort_io(struct fc_lport *lp)
1756 {
1757 int err = 0;
1758 unsigned long flags;
1759 enum fnic_state old_state;
1760 struct fnic *fnic = lport_priv(lp);
1761 DECLARE_COMPLETION_ONSTACK(remove_wait);
1762
1763 /* Issue firmware reset for fnic, wait for reset to complete */
1764 spin_lock_irqsave(&fnic->fnic_lock, flags);
1765 fnic->remove_wait = &remove_wait;
1766 old_state = fnic->state;
1767 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1768 vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
1769 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1770
1771 err = fnic_fw_reset_handler(fnic);
1772 if (err) {
1773 spin_lock_irqsave(&fnic->fnic_lock, flags);
1774 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1775 fnic->state = old_state;
1776 fnic->remove_wait = NULL;
1777 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1778 return;
1779 }
1780
1781 /* Wait for firmware reset to complete */
1782 wait_for_completion_timeout(&remove_wait,
1783 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
1784
1785 spin_lock_irqsave(&fnic->fnic_lock, flags);
1786 fnic->remove_wait = NULL;
1787 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1788 "fnic_scsi_abort_io %s\n",
1789 (fnic->state == FNIC_IN_ETH_MODE) ?
1790 "SUCCESS" : "FAILED");
1791 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1792
1793 }
1794
1795 /*
1796 * This fxn called from libFC to clean up driver IO state on link down
1797 */
1798 void fnic_scsi_cleanup(struct fc_lport *lp)
1799 {
1800 unsigned long flags;
1801 enum fnic_state old_state;
1802 struct fnic *fnic = lport_priv(lp);
1803
1804 /* issue fw reset */
1805 spin_lock_irqsave(&fnic->fnic_lock, flags);
1806 old_state = fnic->state;
1807 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1808 vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
1809 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1810
1811 if (fnic_fw_reset_handler(fnic)) {
1812 spin_lock_irqsave(&fnic->fnic_lock, flags);
1813 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1814 fnic->state = old_state;
1815 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1816 }
1817
1818 }
1819
1820 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
1821 {
1822 }
1823
1824 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
1825 {
1826 struct fnic *fnic = lport_priv(lp);
1827
1828 /* Non-zero sid, nothing to do */
1829 if (sid)
1830 goto call_fc_exch_mgr_reset;
1831
1832 if (did) {
1833 fnic_rport_exch_reset(fnic, did);
1834 goto call_fc_exch_mgr_reset;
1835 }
1836
1837 /*
1838 * sid = 0, did = 0
1839 * link down or device being removed
1840 */
1841 if (!fnic->in_remove)
1842 fnic_scsi_cleanup(lp);
1843 else
1844 fnic_scsi_abort_io(lp);
1845
1846 /* call libFC exch mgr reset to reset its exchanges */
1847 call_fc_exch_mgr_reset:
1848 fc_exch_mgr_reset(lp, sid, did);
1849
1850 }
Support for the Chinese Samsung S3C2440 based development boards