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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_scsi.c
blobd014aae19134624824190305040df9ee37fcbf1d
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 <linux/gfp.h>
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/fc/fc_els.h>
36 #include <scsi/fc/fc_fcoe.h>
37 #include <scsi/libfc.h>
38 #include <scsi/fc_frame.h>
39 #include "fnic_io.h"
40 #include "fnic.h"
41
42 const char *fnic_state_str[] = {
43 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
44 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
45 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
46 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
47 };
48
49 static const char *fnic_ioreq_state_str[] = {
50 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
51 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
52 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
53 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
54 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
55 };
56
57 static const char *fcpio_status_str[] = {
58 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
59 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
60 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
61 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
62 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
63 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
64 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
65 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
66 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
67 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
68 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
69 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
70 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
71 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
72 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
73 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
74 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
75 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
76 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
77 };
78
79 const char *fnic_state_to_str(unsigned int state)
80 {
81 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
82 return "unknown";
83
84 return fnic_state_str[state];
85 }
86
87 static const char *fnic_ioreq_state_to_str(unsigned int state)
88 {
89 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
90 !fnic_ioreq_state_str[state])
91 return "unknown";
92
93 return fnic_ioreq_state_str[state];
94 }
95
96 static const char *fnic_fcpio_status_to_str(unsigned int status)
97 {
98 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
99 return "unknown";
100
101 return fcpio_status_str[status];
102 }
103
104 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
105
106 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
107 struct scsi_cmnd *sc)
108 {
109 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
110
111 return &fnic->io_req_lock[hash];
112 }
113
114 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
115 int tag)
116 {
117 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
118 }
119
120 /*
121 * Unmap the data buffer and sense buffer for an io_req,
122 * also unmap and free the device-private scatter/gather list.
123 */
124 static void fnic_release_ioreq_buf(struct fnic *fnic,
125 struct fnic_io_req *io_req,
126 struct scsi_cmnd *sc)
127 {
128 if (io_req->sgl_list_pa)
129 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
131 PCI_DMA_TODEVICE);
132 scsi_dma_unmap(sc);
133
134 if (io_req->sgl_cnt)
135 mempool_free(io_req->sgl_list_alloc,
136 fnic->io_sgl_pool[io_req->sgl_type]);
137 if (io_req->sense_buf_pa)
138 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
139 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
140 }
141
142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
143 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
144 {
145 /* if no Ack received from firmware, then nothing to clean */
146 if (!fnic->fw_ack_recd[0])
147 return 1;
148
149 /*
150 * Update desc_available count based on number of freed descriptors
151 * Account for wraparound
152 */
153 if (wq->to_clean_index <= fnic->fw_ack_index[0])
154 wq->ring.desc_avail += (fnic->fw_ack_index[0]
155 - wq->to_clean_index + 1);
156 else
157 wq->ring.desc_avail += (wq->ring.desc_count
158 - wq->to_clean_index
159 + fnic->fw_ack_index[0] + 1);
160
161 /*
162 * just bump clean index to ack_index+1 accounting for wraparound
163 * this will essentially free up all descriptors between
164 * to_clean_index and fw_ack_index, both inclusive
165 */
166 wq->to_clean_index =
167 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
168
169 /* we have processed the acks received so far */
170 fnic->fw_ack_recd[0] = 0;
171 return 0;
172 }
173
174
175 /**
176 * __fnic_set_state_flags
177 * Sets/Clears bits in fnic's state_flags
178 **/
179 void
180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
181 unsigned long clearbits)
182 {
183 struct Scsi_Host *host = fnic->lport->host;
184 int sh_locked = spin_is_locked(host->host_lock);
185 unsigned long flags = 0;
186
187 if (!sh_locked)
188 spin_lock_irqsave(host->host_lock, flags);
189
190 if (clearbits)
191 fnic->state_flags &= ~st_flags;
192 else
193 fnic->state_flags |= st_flags;
194
195 if (!sh_locked)
196 spin_unlock_irqrestore(host->host_lock, flags);
197
198 return;
199 }
200
201
202 /*
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
205 */
206 int fnic_fw_reset_handler(struct fnic *fnic)
207 {
208 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
209 int ret = 0;
210 unsigned long flags;
211
212 /* indicate fwreset to io path */
213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
214
215 skb_queue_purge(&fnic->frame_queue);
216 skb_queue_purge(&fnic->tx_queue);
217
218 /* wait for io cmpl */
219 while (atomic_read(&fnic->in_flight))
220 schedule_timeout(msecs_to_jiffies(1));
221
222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
223
224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
225 free_wq_copy_descs(fnic, wq);
226
227 if (!vnic_wq_copy_desc_avail(wq))
228 ret = -EAGAIN;
229 else
230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
231
232 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
233
234 if (!ret)
235 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
236 "Issued fw reset\n");
237 else {
238 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
239 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
240 "Failed to issue fw reset\n");
241 }
242
243 return ret;
244 }
245
246
247 /*
248 * fnic_flogi_reg_handler
249 * Routine to send flogi register msg to fw
250 */
251 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
252 {
253 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
254 enum fcpio_flogi_reg_format_type format;
255 struct fc_lport *lp = fnic->lport;
256 u8 gw_mac[ETH_ALEN];
257 int ret = 0;
258 unsigned long flags;
259
260 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
261
262 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
263 free_wq_copy_descs(fnic, wq);
264
265 if (!vnic_wq_copy_desc_avail(wq)) {
266 ret = -EAGAIN;
267 goto flogi_reg_ioreq_end;
268 }
269
270 if (fnic->ctlr.map_dest) {
271 memset(gw_mac, 0xff, ETH_ALEN);
272 format = FCPIO_FLOGI_REG_DEF_DEST;
273 } else {
274 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
275 format = FCPIO_FLOGI_REG_GW_DEST;
276 }
277
278 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
279 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
280 fc_id, gw_mac,
281 fnic->data_src_addr,
282 lp->r_a_tov, lp->e_d_tov);
283 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
284 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
285 fc_id, fnic->data_src_addr, gw_mac);
286 } else {
287 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
288 format, fc_id, gw_mac);
289 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
290 "FLOGI reg issued fcid %x map %d dest %pM\n",
291 fc_id, fnic->ctlr.map_dest, gw_mac);
292 }
293
294 flogi_reg_ioreq_end:
295 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
296 return ret;
297 }
298
299 /*
300 * fnic_queue_wq_copy_desc
301 * Routine to enqueue a wq copy desc
302 */
303 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
304 struct vnic_wq_copy *wq,
305 struct fnic_io_req *io_req,
306 struct scsi_cmnd *sc,
307 int sg_count)
308 {
309 struct scatterlist *sg;
310 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
311 struct fc_rport_libfc_priv *rp = rport->dd_data;
312 struct host_sg_desc *desc;
313 u8 pri_tag = 0;
314 unsigned int i;
315 unsigned long intr_flags;
316 int flags;
317 u8 exch_flags;
318 struct scsi_lun fc_lun;
319 char msg[2];
320
321 if (sg_count) {
322 /* For each SGE, create a device desc entry */
323 desc = io_req->sgl_list;
324 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
325 desc->addr = cpu_to_le64(sg_dma_address(sg));
326 desc->len = cpu_to_le32(sg_dma_len(sg));
327 desc->_resvd = 0;
328 desc++;
329 }
330
331 io_req->sgl_list_pa = pci_map_single
332 (fnic->pdev,
333 io_req->sgl_list,
334 sizeof(io_req->sgl_list[0]) * sg_count,
335 PCI_DMA_TODEVICE);
336 }
337
338 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
339 sc->sense_buffer,
340 SCSI_SENSE_BUFFERSIZE,
341 PCI_DMA_FROMDEVICE);
342
343 int_to_scsilun(sc->device->lun, &fc_lun);
344
345 pri_tag = FCPIO_ICMND_PTA_SIMPLE;
346 msg[0] = MSG_SIMPLE_TAG;
347 scsi_populate_tag_msg(sc, msg);
348 if (msg[0] == MSG_ORDERED_TAG)
349 pri_tag = FCPIO_ICMND_PTA_ORDERED;
350
351 /* Enqueue the descriptor in the Copy WQ */
352 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
353
354 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
355 free_wq_copy_descs(fnic, wq);
356
357 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
358 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
359 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
360 "fnic_queue_wq_copy_desc failure - no descriptors\n");
361 return SCSI_MLQUEUE_HOST_BUSY;
362 }
363
364 flags = 0;
365 if (sc->sc_data_direction == DMA_FROM_DEVICE)
366 flags = FCPIO_ICMND_RDDATA;
367 else if (sc->sc_data_direction == DMA_TO_DEVICE)
368 flags = FCPIO_ICMND_WRDATA;
369
370 exch_flags = 0;
371 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
372 (rp->flags & FC_RP_FLAGS_RETRY))
373 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
374
375 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
376 0, exch_flags, io_req->sgl_cnt,
377 SCSI_SENSE_BUFFERSIZE,
378 io_req->sgl_list_pa,
379 io_req->sense_buf_pa,
380 0, /* scsi cmd ref, always 0 */
381 pri_tag, /* scsi pri and tag */
382 flags, /* command flags */
383 sc->cmnd, sc->cmd_len,
384 scsi_bufflen(sc),
385 fc_lun.scsi_lun, io_req->port_id,
386 rport->maxframe_size, rp->r_a_tov,
387 rp->e_d_tov);
388
389 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
390 return 0;
391 }
392
393 /*
394 * fnic_queuecommand
395 * Routine to send a scsi cdb
396 * Called with host_lock held and interrupts disabled.
397 */
398 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
399 {
400 struct fc_lport *lp = shost_priv(sc->device->host);
401 struct fc_rport *rport;
402 struct fnic_io_req *io_req = NULL;
403 struct fnic *fnic = lport_priv(lp);
404 struct vnic_wq_copy *wq;
405 int ret;
406 u64 cmd_trace;
407 int sg_count = 0;
408 unsigned long flags;
409 unsigned long ptr;
410
411 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
412 return SCSI_MLQUEUE_HOST_BUSY;
413
414 rport = starget_to_rport(scsi_target(sc->device));
415 ret = fc_remote_port_chkready(rport);
416 if (ret) {
417 sc->result = ret;
418 done(sc);
419 return 0;
420 }
421
422 if (lp->state != LPORT_ST_READY || !(lp->link_up))
423 return SCSI_MLQUEUE_HOST_BUSY;
424
425 atomic_inc(&fnic->in_flight);
426
427 /*
428 * Release host lock, use driver resource specific locks from here.
429 * Don't re-enable interrupts in case they were disabled prior to the
430 * caller disabling them.
431 */
432 spin_unlock(lp->host->host_lock);
433 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
434 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
435
436 /* Get a new io_req for this SCSI IO */
437 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
438 if (!io_req) {
439 ret = SCSI_MLQUEUE_HOST_BUSY;
440 goto out;
441 }
442 memset(io_req, 0, sizeof(*io_req));
443
444 /* Map the data buffer */
445 sg_count = scsi_dma_map(sc);
446 if (sg_count < 0) {
447 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
448 sc->request->tag, sc, 0, sc->cmnd[0],
449 sg_count, CMD_STATE(sc));
450 mempool_free(io_req, fnic->io_req_pool);
451 goto out;
452 }
453
454 /* Determine the type of scatter/gather list we need */
455 io_req->sgl_cnt = sg_count;
456 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
457 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
458 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
459
460 if (sg_count) {
461 io_req->sgl_list =
462 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
463 GFP_ATOMIC);
464 if (!io_req->sgl_list) {
465 ret = SCSI_MLQUEUE_HOST_BUSY;
466 scsi_dma_unmap(sc);
467 mempool_free(io_req, fnic->io_req_pool);
468 goto out;
469 }
470
471 /* Cache sgl list allocated address before alignment */
472 io_req->sgl_list_alloc = io_req->sgl_list;
473 ptr = (unsigned long) io_req->sgl_list;
474 if (ptr % FNIC_SG_DESC_ALIGN) {
475 io_req->sgl_list = (struct host_sg_desc *)
476 (((unsigned long) ptr
477 + FNIC_SG_DESC_ALIGN - 1)
478 & ~(FNIC_SG_DESC_ALIGN - 1));
479 }
480 }
481
482 /* initialize rest of io_req */
483 io_req->port_id = rport->port_id;
484 io_req->start_time = jiffies;
485 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
486 CMD_SP(sc) = (char *)io_req;
487 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
488 sc->scsi_done = done;
489
490 /* create copy wq desc and enqueue it */
491 wq = &fnic->wq_copy[0];
492 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
493 if (ret) {
494 /*
495 * In case another thread cancelled the request,
496 * refetch the pointer under the lock.
497 */
498 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
499 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
500 sc->request->tag, sc, 0, 0, 0,
501 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
502 spin_lock_irqsave(io_lock, flags);
503 io_req = (struct fnic_io_req *)CMD_SP(sc);
504 CMD_SP(sc) = NULL;
505 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
506 spin_unlock_irqrestore(io_lock, flags);
507 if (io_req) {
508 fnic_release_ioreq_buf(fnic, io_req, sc);
509 mempool_free(io_req, fnic->io_req_pool);
510 }
511 } else {
512 /* REVISIT: Use per IO lock in the final code */
513 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
514 }
515 out:
516 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
517 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
518 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
519 sc->cmnd[5]);
520
521 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
522 sc->request->tag, sc, io_req,
523 sg_count, cmd_trace,
524 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
525 atomic_dec(&fnic->in_flight);
526 /* acquire host lock before returning to SCSI */
527 spin_lock(lp->host->host_lock);
528 return ret;
529 }
530
531 DEF_SCSI_QCMD(fnic_queuecommand)
532
533 /*
534 * fnic_fcpio_fw_reset_cmpl_handler
535 * Routine to handle fw reset completion
536 */
537 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
538 struct fcpio_fw_req *desc)
539 {
540 u8 type;
541 u8 hdr_status;
542 struct fcpio_tag tag;
543 int ret = 0;
544 unsigned long flags;
545
546 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
547
548 /* Clean up all outstanding io requests */
549 fnic_cleanup_io(fnic, SCSI_NO_TAG);
550
551 spin_lock_irqsave(&fnic->fnic_lock, flags);
552
553 /* fnic should be in FC_TRANS_ETH_MODE */
554 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
555 /* Check status of reset completion */
556 if (!hdr_status) {
557 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
558 "reset cmpl success\n");
559 /* Ready to send flogi out */
560 fnic->state = FNIC_IN_ETH_MODE;
561 } else {
562 FNIC_SCSI_DBG(KERN_DEBUG,
563 fnic->lport->host,
564 "fnic fw_reset : failed %s\n",
565 fnic_fcpio_status_to_str(hdr_status));
566
567 /*
568 * Unable to change to eth mode, cannot send out flogi
569 * Change state to fc mode, so that subsequent Flogi
570 * requests from libFC will cause more attempts to
571 * reset the firmware. Free the cached flogi
572 */
573 fnic->state = FNIC_IN_FC_MODE;
574 ret = -1;
575 }
576 } else {
577 FNIC_SCSI_DBG(KERN_DEBUG,
578 fnic->lport->host,
579 "Unexpected state %s while processing"
580 " reset cmpl\n", fnic_state_to_str(fnic->state));
581 ret = -1;
582 }
583
584 /* Thread removing device blocks till firmware reset is complete */
585 if (fnic->remove_wait)
586 complete(fnic->remove_wait);
587
588 /*
589 * If fnic is being removed, or fw reset failed
590 * free the flogi frame. Else, send it out
591 */
592 if (fnic->remove_wait || ret) {
593 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
594 skb_queue_purge(&fnic->tx_queue);
595 goto reset_cmpl_handler_end;
596 }
597
598 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
599
600 fnic_flush_tx(fnic);
601
602 reset_cmpl_handler_end:
603 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
604
605 return ret;
606 }
607
608 /*
609 * fnic_fcpio_flogi_reg_cmpl_handler
610 * Routine to handle flogi register completion
611 */
612 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
613 struct fcpio_fw_req *desc)
614 {
615 u8 type;
616 u8 hdr_status;
617 struct fcpio_tag tag;
618 int ret = 0;
619 unsigned long flags;
620
621 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
622
623 /* Update fnic state based on status of flogi reg completion */
624 spin_lock_irqsave(&fnic->fnic_lock, flags);
625
626 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
627
628 /* Check flogi registration completion status */
629 if (!hdr_status) {
630 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
631 "flog reg succeeded\n");
632 fnic->state = FNIC_IN_FC_MODE;
633 } else {
634 FNIC_SCSI_DBG(KERN_DEBUG,
635 fnic->lport->host,
636 "fnic flogi reg :failed %s\n",
637 fnic_fcpio_status_to_str(hdr_status));
638 fnic->state = FNIC_IN_ETH_MODE;
639 ret = -1;
640 }
641 } else {
642 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
643 "Unexpected fnic state %s while"
644 " processing flogi reg completion\n",
645 fnic_state_to_str(fnic->state));
646 ret = -1;
647 }
648
649 if (!ret) {
650 if (fnic->stop_rx_link_events) {
651 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
652 goto reg_cmpl_handler_end;
653 }
654 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
655
656 fnic_flush_tx(fnic);
657 queue_work(fnic_event_queue, &fnic->frame_work);
658 } else {
659 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
660 }
661
662 reg_cmpl_handler_end:
663 return ret;
664 }
665
666 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
667 u16 request_out)
668 {
669 if (wq->to_clean_index <= wq->to_use_index) {
670 /* out of range, stale request_out index */
671 if (request_out < wq->to_clean_index ||
672 request_out >= wq->to_use_index)
673 return 0;
674 } else {
675 /* out of range, stale request_out index */
676 if (request_out < wq->to_clean_index &&
677 request_out >= wq->to_use_index)
678 return 0;
679 }
680 /* request_out index is in range */
681 return 1;
682 }
683
684
685 /*
686 * Mark that ack received and store the Ack index. If there are multiple
687 * acks received before Tx thread cleans it up, the latest value will be
688 * used which is correct behavior. This state should be in the copy Wq
689 * instead of in the fnic
690 */
691 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
692 unsigned int cq_index,
693 struct fcpio_fw_req *desc)
694 {
695 struct vnic_wq_copy *wq;
696 u16 request_out = desc->u.ack.request_out;
697 unsigned long flags;
698 u64 *ox_id_tag = (u64 *)(void *)desc;
699
700 /* mark the ack state */
701 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
702 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
703
704 if (is_ack_index_in_range(wq, request_out)) {
705 fnic->fw_ack_index[0] = request_out;
706 fnic->fw_ack_recd[0] = 1;
707 }
708 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
709 FNIC_TRACE(fnic_fcpio_ack_handler,
710 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
711 ox_id_tag[4], ox_id_tag[5]);
712 }
713
714 /*
715 * fnic_fcpio_icmnd_cmpl_handler
716 * Routine to handle icmnd completions
717 */
718 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
719 struct fcpio_fw_req *desc)
720 {
721 u8 type;
722 u8 hdr_status;
723 struct fcpio_tag tag;
724 u32 id;
725 u64 xfer_len = 0;
726 struct fcpio_icmnd_cmpl *icmnd_cmpl;
727 struct fnic_io_req *io_req;
728 struct scsi_cmnd *sc;
729 unsigned long flags;
730 spinlock_t *io_lock;
731 u64 cmd_trace;
732 unsigned long start_time;
733
734 /* Decode the cmpl description to get the io_req id */
735 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
736 fcpio_tag_id_dec(&tag, &id);
737 icmnd_cmpl = &desc->u.icmnd_cmpl;
738
739 if (id >= fnic->fnic_max_tag_id) {
740 shost_printk(KERN_ERR, fnic->lport->host,
741 "Tag out of range tag %x hdr status = %s\n",
742 id, fnic_fcpio_status_to_str(hdr_status));
743 return;
744 }
745
746 sc = scsi_host_find_tag(fnic->lport->host, id);
747 WARN_ON_ONCE(!sc);
748 if (!sc) {
749 shost_printk(KERN_ERR, fnic->lport->host,
750 "icmnd_cmpl sc is null - "
751 "hdr status = %s tag = 0x%x desc = 0x%p\n",
752 fnic_fcpio_status_to_str(hdr_status), id, desc);
753 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
754 fnic->lport->host->host_no, id,
755 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
756 (u64)icmnd_cmpl->_resvd0[0]),
757 ((u64)hdr_status << 16 |
758 (u64)icmnd_cmpl->scsi_status << 8 |
759 (u64)icmnd_cmpl->flags), desc,
760 (u64)icmnd_cmpl->residual, 0);
761 return;
762 }
763
764 io_lock = fnic_io_lock_hash(fnic, sc);
765 spin_lock_irqsave(io_lock, flags);
766 io_req = (struct fnic_io_req *)CMD_SP(sc);
767 WARN_ON_ONCE(!io_req);
768 if (!io_req) {
769 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
770 spin_unlock_irqrestore(io_lock, flags);
771 shost_printk(KERN_ERR, fnic->lport->host,
772 "icmnd_cmpl io_req is null - "
773 "hdr status = %s tag = 0x%x sc 0x%p\n",
774 fnic_fcpio_status_to_str(hdr_status), id, sc);
775 return;
776 }
777 start_time = io_req->start_time;
778
779 /* firmware completed the io */
780 io_req->io_completed = 1;
781
782 /*
783 * if SCSI-ML has already issued abort on this command,
784 * ignore completion of the IO. The abts path will clean it up
785 */
786 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
787 spin_unlock_irqrestore(io_lock, flags);
788 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
789 switch (hdr_status) {
790 case FCPIO_SUCCESS:
791 CMD_FLAGS(sc) |= FNIC_IO_DONE;
792 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
793 "icmnd_cmpl ABTS pending hdr status = %s "
794 "sc 0x%p scsi_status %x residual %d\n",
795 fnic_fcpio_status_to_str(hdr_status), sc,
796 icmnd_cmpl->scsi_status,
797 icmnd_cmpl->residual);
798 break;
799 case FCPIO_ABORTED:
800 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
801 break;
802 default:
803 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
804 "icmnd_cmpl abts pending "
805 "hdr status = %s tag = 0x%x sc = 0x%p\n",
806 fnic_fcpio_status_to_str(hdr_status),
807 id, sc);
808 break;
809 }
810 return;
811 }
812
813 /* Mark the IO as complete */
814 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
815
816 icmnd_cmpl = &desc->u.icmnd_cmpl;
817
818 switch (hdr_status) {
819 case FCPIO_SUCCESS:
820 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
821 xfer_len = scsi_bufflen(sc);
822 scsi_set_resid(sc, icmnd_cmpl->residual);
823
824 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
825 xfer_len -= icmnd_cmpl->residual;
826
827 break;
828
829 case FCPIO_TIMEOUT: /* request was timed out */
830 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
831 break;
832
833 case FCPIO_ABORTED: /* request was aborted */
834 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
835 break;
836
837 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
838 scsi_set_resid(sc, icmnd_cmpl->residual);
839 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
840 break;
841
842 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
843 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
844 break;
845 case FCPIO_INVALID_HEADER: /* header contains invalid data */
846 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
847 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
848 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
849 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
850 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
851 case FCPIO_FW_ERR: /* request was terminated due fw error */
852 default:
853 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
854 fnic_fcpio_status_to_str(hdr_status));
855 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
856 break;
857 }
858
859 /* Break link with the SCSI command */
860 CMD_SP(sc) = NULL;
861 CMD_FLAGS(sc) |= FNIC_IO_DONE;
862
863 spin_unlock_irqrestore(io_lock, flags);
864
865 fnic_release_ioreq_buf(fnic, io_req, sc);
866
867 mempool_free(io_req, fnic->io_req_pool);
868
869 cmd_trace = ((u64)hdr_status << 56) |
870 (u64)icmnd_cmpl->scsi_status << 48 |
871 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
872 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
873 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
874
875 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
876 sc->device->host->host_no, id, sc,
877 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
878 (u64)icmnd_cmpl->_resvd0[0] << 48 |
879 jiffies_to_msecs(jiffies - start_time)),
880 desc, cmd_trace,
881 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
882
883 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
884 fnic->lport->host_stats.fcp_input_requests++;
885 fnic->fcp_input_bytes += xfer_len;
886 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
887 fnic->lport->host_stats.fcp_output_requests++;
888 fnic->fcp_output_bytes += xfer_len;
889 } else
890 fnic->lport->host_stats.fcp_control_requests++;
891
892 /* Call SCSI completion function to complete the IO */
893 if (sc->scsi_done)
894 sc->scsi_done(sc);
895 }
896
897 /* fnic_fcpio_itmf_cmpl_handler
898 * Routine to handle itmf completions
899 */
900 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
901 struct fcpio_fw_req *desc)
902 {
903 u8 type;
904 u8 hdr_status;
905 struct fcpio_tag tag;
906 u32 id;
907 struct scsi_cmnd *sc;
908 struct fnic_io_req *io_req;
909 unsigned long flags;
910 spinlock_t *io_lock;
911 unsigned long start_time;
912
913 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
914 fcpio_tag_id_dec(&tag, &id);
915
916 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
917 shost_printk(KERN_ERR, fnic->lport->host,
918 "Tag out of range tag %x hdr status = %s\n",
919 id, fnic_fcpio_status_to_str(hdr_status));
920 return;
921 }
922
923 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
924 WARN_ON_ONCE(!sc);
925 if (!sc) {
926 shost_printk(KERN_ERR, fnic->lport->host,
927 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
928 fnic_fcpio_status_to_str(hdr_status), id);
929 return;
930 }
931 io_lock = fnic_io_lock_hash(fnic, sc);
932 spin_lock_irqsave(io_lock, flags);
933 io_req = (struct fnic_io_req *)CMD_SP(sc);
934 WARN_ON_ONCE(!io_req);
935 if (!io_req) {
936 spin_unlock_irqrestore(io_lock, flags);
937 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
938 shost_printk(KERN_ERR, fnic->lport->host,
939 "itmf_cmpl io_req is null - "
940 "hdr status = %s tag = 0x%x sc 0x%p\n",
941 fnic_fcpio_status_to_str(hdr_status), id, sc);
942 return;
943 }
944 start_time = io_req->start_time;
945
946 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
947 /* Abort and terminate completion of device reset req */
948 /* REVISIT : Add asserts about various flags */
949 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
950 "dev reset abts cmpl recd. id %x status %s\n",
951 id, fnic_fcpio_status_to_str(hdr_status));
952 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
953 CMD_ABTS_STATUS(sc) = hdr_status;
954 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
955 if (io_req->abts_done)
956 complete(io_req->abts_done);
957 spin_unlock_irqrestore(io_lock, flags);
958 } else if (id & FNIC_TAG_ABORT) {
959 /* Completion of abort cmd */
960 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
961 /* This is a late completion. Ignore it */
962 spin_unlock_irqrestore(io_lock, flags);
963 return;
964 }
965 CMD_ABTS_STATUS(sc) = hdr_status;
966 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
967 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
968 "abts cmpl recd. id %d status %s\n",
969 (int)(id & FNIC_TAG_MASK),
970 fnic_fcpio_status_to_str(hdr_status));
971
972 /*
973 * If scsi_eh thread is blocked waiting for abts to complete,
974 * signal completion to it. IO will be cleaned in the thread
975 * else clean it in this context
976 */
977 if (io_req->abts_done) {
978 complete(io_req->abts_done);
979 spin_unlock_irqrestore(io_lock, flags);
980 } else {
981 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
982 "abts cmpl, completing IO\n");
983 CMD_SP(sc) = NULL;
984 sc->result = (DID_ERROR << 16);
985
986 spin_unlock_irqrestore(io_lock, flags);
987
988 fnic_release_ioreq_buf(fnic, io_req, sc);
989 mempool_free(io_req, fnic->io_req_pool);
990 if (sc->scsi_done) {
991 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
992 sc->device->host->host_no, id,
993 sc,
994 jiffies_to_msecs(jiffies - start_time),
995 desc,
996 (((u64)hdr_status << 40) |
997 (u64)sc->cmnd[0] << 32 |
998 (u64)sc->cmnd[2] << 24 |
999 (u64)sc->cmnd[3] << 16 |
1000 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1001 (((u64)CMD_FLAGS(sc) << 32) |
1002 CMD_STATE(sc)));
1003 sc->scsi_done(sc);
1004 }
1005 }
1006
1007 } else if (id & FNIC_TAG_DEV_RST) {
1008 /* Completion of device reset */
1009 CMD_LR_STATUS(sc) = hdr_status;
1010 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1011 spin_unlock_irqrestore(io_lock, flags);
1012 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1013 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1014 sc->device->host->host_no, id, sc,
1015 jiffies_to_msecs(jiffies - start_time),
1016 desc, 0,
1017 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1018 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1019 "Terminate pending "
1020 "dev reset cmpl recd. id %d status %s\n",
1021 (int)(id & FNIC_TAG_MASK),
1022 fnic_fcpio_status_to_str(hdr_status));
1023 return;
1024 }
1025 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1026 /* Need to wait for terminate completion */
1027 spin_unlock_irqrestore(io_lock, flags);
1028 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1029 sc->device->host->host_no, id, sc,
1030 jiffies_to_msecs(jiffies - start_time),
1031 desc, 0,
1032 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1033 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1034 "dev reset cmpl recd after time out. "
1035 "id %d status %s\n",
1036 (int)(id & FNIC_TAG_MASK),
1037 fnic_fcpio_status_to_str(hdr_status));
1038 return;
1039 }
1040 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1041 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1042 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1043 "dev reset cmpl recd. id %d status %s\n",
1044 (int)(id & FNIC_TAG_MASK),
1045 fnic_fcpio_status_to_str(hdr_status));
1046 if (io_req->dr_done)
1047 complete(io_req->dr_done);
1048 spin_unlock_irqrestore(io_lock, flags);
1049
1050 } else {
1051 shost_printk(KERN_ERR, fnic->lport->host,
1052 "Unexpected itmf io state %s tag %x\n",
1053 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1054 spin_unlock_irqrestore(io_lock, flags);
1055 }
1056
1057 }
1058
1059 /*
1060 * fnic_fcpio_cmpl_handler
1061 * Routine to service the cq for wq_copy
1062 */
1063 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1064 unsigned int cq_index,
1065 struct fcpio_fw_req *desc)
1066 {
1067 struct fnic *fnic = vnic_dev_priv(vdev);
1068
1069 switch (desc->hdr.type) {
1070 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1071 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1072 break;
1073
1074 case FCPIO_ICMND_CMPL: /* fw completed a command */
1075 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1076 break;
1077
1078 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1079 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1080 break;
1081
1082 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1083 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1084 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1085 break;
1086
1087 case FCPIO_RESET_CMPL: /* fw completed reset */
1088 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1089 break;
1090
1091 default:
1092 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1093 "firmware completion type %d\n",
1094 desc->hdr.type);
1095 break;
1096 }
1097
1098 return 0;
1099 }
1100
1101 /*
1102 * fnic_wq_copy_cmpl_handler
1103 * Routine to process wq copy
1104 */
1105 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1106 {
1107 unsigned int wq_work_done = 0;
1108 unsigned int i, cq_index;
1109 unsigned int cur_work_done;
1110
1111 for (i = 0; i < fnic->wq_copy_count; i++) {
1112 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1113 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1114 fnic_fcpio_cmpl_handler,
1115 copy_work_to_do);
1116 wq_work_done += cur_work_done;
1117 }
1118 return wq_work_done;
1119 }
1120
1121 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1122 {
1123 int i;
1124 struct fnic_io_req *io_req;
1125 unsigned long flags = 0;
1126 struct scsi_cmnd *sc;
1127 spinlock_t *io_lock;
1128 unsigned long start_time = 0;
1129
1130 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1131 if (i == exclude_id)
1132 continue;
1133
1134 io_lock = fnic_io_lock_tag(fnic, i);
1135 spin_lock_irqsave(io_lock, flags);
1136 sc = scsi_host_find_tag(fnic->lport->host, i);
1137 if (!sc) {
1138 spin_unlock_irqrestore(io_lock, flags);
1139 continue;
1140 }
1141
1142 io_req = (struct fnic_io_req *)CMD_SP(sc);
1143 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1144 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1145 /*
1146 * We will be here only when FW completes reset
1147 * without sending completions for outstanding ios.
1148 */
1149 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1150 if (io_req && io_req->dr_done)
1151 complete(io_req->dr_done);
1152 else if (io_req && io_req->abts_done)
1153 complete(io_req->abts_done);
1154 spin_unlock_irqrestore(io_lock, flags);
1155 continue;
1156 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1157 spin_unlock_irqrestore(io_lock, flags);
1158 continue;
1159 }
1160 if (!io_req) {
1161 spin_unlock_irqrestore(io_lock, flags);
1162 goto cleanup_scsi_cmd;
1163 }
1164
1165 CMD_SP(sc) = NULL;
1166
1167 spin_unlock_irqrestore(io_lock, flags);
1168
1169 /*
1170 * If there is a scsi_cmnd associated with this io_req, then
1171 * free the corresponding state
1172 */
1173 start_time = io_req->start_time;
1174 fnic_release_ioreq_buf(fnic, io_req, sc);
1175 mempool_free(io_req, fnic->io_req_pool);
1176
1177 cleanup_scsi_cmd:
1178 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1179 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
1180 " DID_TRANSPORT_DISRUPTED\n");
1181
1182 /* Complete the command to SCSI */
1183 if (sc->scsi_done) {
1184 FNIC_TRACE(fnic_cleanup_io,
1185 sc->device->host->host_no, i, sc,
1186 jiffies_to_msecs(jiffies - start_time),
1187 0, ((u64)sc->cmnd[0] << 32 |
1188 (u64)sc->cmnd[2] << 24 |
1189 (u64)sc->cmnd[3] << 16 |
1190 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1191 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1192
1193 sc->scsi_done(sc);
1194 }
1195 }
1196 }
1197
1198 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1199 struct fcpio_host_req *desc)
1200 {
1201 u32 id;
1202 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1203 struct fnic_io_req *io_req;
1204 struct scsi_cmnd *sc;
1205 unsigned long flags;
1206 spinlock_t *io_lock;
1207 unsigned long start_time = 0;
1208
1209 /* get the tag reference */
1210 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1211 id &= FNIC_TAG_MASK;
1212
1213 if (id >= fnic->fnic_max_tag_id)
1214 return;
1215
1216 sc = scsi_host_find_tag(fnic->lport->host, id);
1217 if (!sc)
1218 return;
1219
1220 io_lock = fnic_io_lock_hash(fnic, sc);
1221 spin_lock_irqsave(io_lock, flags);
1222
1223 /* Get the IO context which this desc refers to */
1224 io_req = (struct fnic_io_req *)CMD_SP(sc);
1225
1226 /* fnic interrupts are turned off by now */
1227
1228 if (!io_req) {
1229 spin_unlock_irqrestore(io_lock, flags);
1230 goto wq_copy_cleanup_scsi_cmd;
1231 }
1232
1233 CMD_SP(sc) = NULL;
1234
1235 spin_unlock_irqrestore(io_lock, flags);
1236
1237 start_time = io_req->start_time;
1238 fnic_release_ioreq_buf(fnic, io_req, sc);
1239 mempool_free(io_req, fnic->io_req_pool);
1240
1241 wq_copy_cleanup_scsi_cmd:
1242 sc->result = DID_NO_CONNECT << 16;
1243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1244 " DID_NO_CONNECT\n");
1245
1246 if (sc->scsi_done) {
1247 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1248 sc->device->host->host_no, id, sc,
1249 jiffies_to_msecs(jiffies - start_time),
1250 0, ((u64)sc->cmnd[0] << 32 |
1251 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1252 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1253 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1254
1255 sc->scsi_done(sc);
1256 }
1257 }
1258
1259 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1260 u32 task_req, u8 *fc_lun,
1261 struct fnic_io_req *io_req)
1262 {
1263 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1264 struct Scsi_Host *host = fnic->lport->host;
1265 unsigned long flags;
1266
1267 spin_lock_irqsave(host->host_lock, flags);
1268 if (unlikely(fnic_chk_state_flags_locked(fnic,
1269 FNIC_FLAGS_IO_BLOCKED))) {
1270 spin_unlock_irqrestore(host->host_lock, flags);
1271 return 1;
1272 } else
1273 atomic_inc(&fnic->in_flight);
1274 spin_unlock_irqrestore(host->host_lock, flags);
1275
1276 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1277
1278 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1279 free_wq_copy_descs(fnic, wq);
1280
1281 if (!vnic_wq_copy_desc_avail(wq)) {
1282 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1283 atomic_dec(&fnic->in_flight);
1284 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1285 "fnic_queue_abort_io_req: failure: no descriptors\n");
1286 return 1;
1287 }
1288 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1289 0, task_req, tag, fc_lun, io_req->port_id,
1290 fnic->config.ra_tov, fnic->config.ed_tov);
1291
1292 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1293 atomic_dec(&fnic->in_flight);
1294
1295 return 0;
1296 }
1297
1298 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1299 {
1300 int tag;
1301 int abt_tag;
1302 struct fnic_io_req *io_req;
1303 spinlock_t *io_lock;
1304 unsigned long flags;
1305 struct scsi_cmnd *sc;
1306 struct scsi_lun fc_lun;
1307 enum fnic_ioreq_state old_ioreq_state;
1308
1309 FNIC_SCSI_DBG(KERN_DEBUG,
1310 fnic->lport->host,
1311 "fnic_rport_exch_reset called portid 0x%06x\n",
1312 port_id);
1313
1314 if (fnic->in_remove)
1315 return;
1316
1317 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1318 abt_tag = tag;
1319 io_lock = fnic_io_lock_tag(fnic, tag);
1320 spin_lock_irqsave(io_lock, flags);
1321 sc = scsi_host_find_tag(fnic->lport->host, tag);
1322 if (!sc) {
1323 spin_unlock_irqrestore(io_lock, flags);
1324 continue;
1325 }
1326
1327 io_req = (struct fnic_io_req *)CMD_SP(sc);
1328
1329 if (!io_req || io_req->port_id != port_id) {
1330 spin_unlock_irqrestore(io_lock, flags);
1331 continue;
1332 }
1333
1334 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1335 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1336 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1337 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1338 sc);
1339 spin_unlock_irqrestore(io_lock, flags);
1340 continue;
1341 }
1342
1343 /*
1344 * Found IO that is still pending with firmware and
1345 * belongs to rport that went away
1346 */
1347 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1348 spin_unlock_irqrestore(io_lock, flags);
1349 continue;
1350 }
1351 if (io_req->abts_done) {
1352 shost_printk(KERN_ERR, fnic->lport->host,
1353 "fnic_rport_exch_reset: io_req->abts_done is set "
1354 "state is %s\n",
1355 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1356 }
1357
1358 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1359 shost_printk(KERN_ERR, fnic->lport->host,
1360 "rport_exch_reset "
1361 "IO not yet issued %p tag 0x%x flags "
1362 "%x state %d\n",
1363 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1364 }
1365 old_ioreq_state = CMD_STATE(sc);
1366 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1367 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1368 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1369 abt_tag = (tag | FNIC_TAG_DEV_RST);
1370 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1371 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1372 sc);
1373 }
1374
1375 BUG_ON(io_req->abts_done);
1376
1377 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1378 "fnic_rport_reset_exch: Issuing abts\n");
1379
1380 spin_unlock_irqrestore(io_lock, flags);
1381
1382 /* Now queue the abort command to firmware */
1383 int_to_scsilun(sc->device->lun, &fc_lun);
1384
1385 if (fnic_queue_abort_io_req(fnic, abt_tag,
1386 FCPIO_ITMF_ABT_TASK_TERM,
1387 fc_lun.scsi_lun, io_req)) {
1388 /*
1389 * Revert the cmd state back to old state, if
1390 * it hasn't changed in between. This cmd will get
1391 * aborted later by scsi_eh, or cleaned up during
1392 * lun reset
1393 */
1394 spin_lock_irqsave(io_lock, flags);
1395 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1396 CMD_STATE(sc) = old_ioreq_state;
1397 spin_unlock_irqrestore(io_lock, flags);
1398 } else {
1399 spin_lock_irqsave(io_lock, flags);
1400 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1401 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1402 else
1403 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1404 spin_unlock_irqrestore(io_lock, flags);
1405 }
1406 }
1407
1408 }
1409
1410 void fnic_terminate_rport_io(struct fc_rport *rport)
1411 {
1412 int tag;
1413 int abt_tag;
1414 struct fnic_io_req *io_req;
1415 spinlock_t *io_lock;
1416 unsigned long flags;
1417 struct scsi_cmnd *sc;
1418 struct scsi_lun fc_lun;
1419 struct fc_rport_libfc_priv *rdata;
1420 struct fc_lport *lport;
1421 struct fnic *fnic;
1422 struct fc_rport *cmd_rport;
1423 enum fnic_ioreq_state old_ioreq_state;
1424
1425 if (!rport) {
1426 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1427 return;
1428 }
1429 rdata = rport->dd_data;
1430
1431 if (!rdata) {
1432 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1433 return;
1434 }
1435 lport = rdata->local_port;
1436
1437 if (!lport) {
1438 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1439 return;
1440 }
1441 fnic = lport_priv(lport);
1442 FNIC_SCSI_DBG(KERN_DEBUG,
1443 fnic->lport->host, "fnic_terminate_rport_io called"
1444 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1445 rport->port_name, rport->node_name, rport,
1446 rport->port_id);
1447
1448 if (fnic->in_remove)
1449 return;
1450
1451 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1452 abt_tag = tag;
1453 io_lock = fnic_io_lock_tag(fnic, tag);
1454 spin_lock_irqsave(io_lock, flags);
1455 sc = scsi_host_find_tag(fnic->lport->host, tag);
1456 if (!sc) {
1457 spin_unlock_irqrestore(io_lock, flags);
1458 continue;
1459 }
1460
1461 cmd_rport = starget_to_rport(scsi_target(sc->device));
1462 if (rport != cmd_rport) {
1463 spin_unlock_irqrestore(io_lock, flags);
1464 continue;
1465 }
1466
1467 io_req = (struct fnic_io_req *)CMD_SP(sc);
1468
1469 if (!io_req || rport != cmd_rport) {
1470 spin_unlock_irqrestore(io_lock, flags);
1471 continue;
1472 }
1473
1474 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1475 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1476 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1477 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1478 sc);
1479 spin_unlock_irqrestore(io_lock, flags);
1480 continue;
1481 }
1482 /*
1483 * Found IO that is still pending with firmware and
1484 * belongs to rport that went away
1485 */
1486 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1487 spin_unlock_irqrestore(io_lock, flags);
1488 continue;
1489 }
1490 if (io_req->abts_done) {
1491 shost_printk(KERN_ERR, fnic->lport->host,
1492 "fnic_terminate_rport_io: io_req->abts_done is set "
1493 "state is %s\n",
1494 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1495 }
1496 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1497 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1498 "fnic_terminate_rport_io "
1499 "IO not yet issued %p tag 0x%x flags "
1500 "%x state %d\n",
1501 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1502 }
1503 old_ioreq_state = CMD_STATE(sc);
1504 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1505 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1506 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1507 abt_tag = (tag | FNIC_TAG_DEV_RST);
1508 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1509 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1510 }
1511
1512 BUG_ON(io_req->abts_done);
1513
1514 FNIC_SCSI_DBG(KERN_DEBUG,
1515 fnic->lport->host,
1516 "fnic_terminate_rport_io: Issuing abts\n");
1517
1518 spin_unlock_irqrestore(io_lock, flags);
1519
1520 /* Now queue the abort command to firmware */
1521 int_to_scsilun(sc->device->lun, &fc_lun);
1522
1523 if (fnic_queue_abort_io_req(fnic, abt_tag,
1524 FCPIO_ITMF_ABT_TASK_TERM,
1525 fc_lun.scsi_lun, io_req)) {
1526 /*
1527 * Revert the cmd state back to old state, if
1528 * it hasn't changed in between. This cmd will get
1529 * aborted later by scsi_eh, or cleaned up during
1530 * lun reset
1531 */
1532 spin_lock_irqsave(io_lock, flags);
1533 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1534 CMD_STATE(sc) = old_ioreq_state;
1535 spin_unlock_irqrestore(io_lock, flags);
1536 } else {
1537 spin_lock_irqsave(io_lock, flags);
1538 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1539 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1540 else
1541 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1542 spin_unlock_irqrestore(io_lock, flags);
1543 }
1544 }
1545
1546 }
1547
1548 /*
1549 * This function is exported to SCSI for sending abort cmnds.
1550 * A SCSI IO is represented by a io_req in the driver.
1551 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1552 */
1553 int fnic_abort_cmd(struct scsi_cmnd *sc)
1554 {
1555 struct fc_lport *lp;
1556 struct fnic *fnic;
1557 struct fnic_io_req *io_req = NULL;
1558 struct fc_rport *rport;
1559 spinlock_t *io_lock;
1560 unsigned long flags;
1561 unsigned long start_time = 0;
1562 int ret = SUCCESS;
1563 u32 task_req = 0;
1564 struct scsi_lun fc_lun;
1565 int tag;
1566 DECLARE_COMPLETION_ONSTACK(tm_done);
1567
1568 /* Wait for rport to unblock */
1569 fc_block_scsi_eh(sc);
1570
1571 /* Get local-port, check ready and link up */
1572 lp = shost_priv(sc->device->host);
1573
1574 fnic = lport_priv(lp);
1575 rport = starget_to_rport(scsi_target(sc->device));
1576 tag = sc->request->tag;
1577 FNIC_SCSI_DBG(KERN_DEBUG,
1578 fnic->lport->host,
1579 "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %x flags %x\n",
1580 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1581
1582 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1583
1584 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1585 ret = FAILED;
1586 goto fnic_abort_cmd_end;
1587 }
1588
1589 /*
1590 * Avoid a race between SCSI issuing the abort and the device
1591 * completing the command.
1592 *
1593 * If the command is already completed by the fw cmpl code,
1594 * we just return SUCCESS from here. This means that the abort
1595 * succeeded. In the SCSI ML, since the timeout for command has
1596 * happened, the completion wont actually complete the command
1597 * and it will be considered as an aborted command
1598 *
1599 * The CMD_SP will not be cleared except while holding io_req_lock.
1600 */
1601 io_lock = fnic_io_lock_hash(fnic, sc);
1602 spin_lock_irqsave(io_lock, flags);
1603 io_req = (struct fnic_io_req *)CMD_SP(sc);
1604 if (!io_req) {
1605 spin_unlock_irqrestore(io_lock, flags);
1606 goto fnic_abort_cmd_end;
1607 }
1608
1609 io_req->abts_done = &tm_done;
1610
1611 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1612 spin_unlock_irqrestore(io_lock, flags);
1613 goto wait_pending;
1614 }
1615 /*
1616 * Command is still pending, need to abort it
1617 * If the firmware completes the command after this point,
1618 * the completion wont be done till mid-layer, since abort
1619 * has already started.
1620 */
1621 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1622 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1623
1624 spin_unlock_irqrestore(io_lock, flags);
1625
1626 /*
1627 * Check readiness of the remote port. If the path to remote
1628 * port is up, then send abts to the remote port to terminate
1629 * the IO. Else, just locally terminate the IO in the firmware
1630 */
1631 if (fc_remote_port_chkready(rport) == 0)
1632 task_req = FCPIO_ITMF_ABT_TASK;
1633 else
1634 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1635
1636 /* Now queue the abort command to firmware */
1637 int_to_scsilun(sc->device->lun, &fc_lun);
1638
1639 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1640 fc_lun.scsi_lun, io_req)) {
1641 spin_lock_irqsave(io_lock, flags);
1642 io_req = (struct fnic_io_req *)CMD_SP(sc);
1643 if (io_req)
1644 io_req->abts_done = NULL;
1645 spin_unlock_irqrestore(io_lock, flags);
1646 ret = FAILED;
1647 goto fnic_abort_cmd_end;
1648 }
1649 if (task_req == FCPIO_ITMF_ABT_TASK)
1650 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1651 else
1652 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1653
1654 /*
1655 * We queued an abort IO, wait for its completion.
1656 * Once the firmware completes the abort command, it will
1657 * wake up this thread.
1658 */
1659 wait_pending:
1660 wait_for_completion_timeout(&tm_done,
1661 msecs_to_jiffies
1662 (2 * fnic->config.ra_tov +
1663 fnic->config.ed_tov));
1664
1665 /* Check the abort status */
1666 spin_lock_irqsave(io_lock, flags);
1667
1668 io_req = (struct fnic_io_req *)CMD_SP(sc);
1669 if (!io_req) {
1670 spin_unlock_irqrestore(io_lock, flags);
1671 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1672 ret = FAILED;
1673 goto fnic_abort_cmd_end;
1674 }
1675 io_req->abts_done = NULL;
1676
1677 /* fw did not complete abort, timed out */
1678 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1679 spin_unlock_irqrestore(io_lock, flags);
1680 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1681 ret = FAILED;
1682 goto fnic_abort_cmd_end;
1683 }
1684
1685 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1686
1687 /*
1688 * firmware completed the abort, check the status,
1689 * free the io_req irrespective of failure or success
1690 */
1691 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1692 ret = FAILED;
1693
1694 CMD_SP(sc) = NULL;
1695
1696 spin_unlock_irqrestore(io_lock, flags);
1697
1698 start_time = io_req->start_time;
1699 fnic_release_ioreq_buf(fnic, io_req, sc);
1700 mempool_free(io_req, fnic->io_req_pool);
1701
1702 fnic_abort_cmd_end:
1703 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1704 sc->request->tag, sc,
1705 jiffies_to_msecs(jiffies - start_time),
1706 0, ((u64)sc->cmnd[0] << 32 |
1707 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1708 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1709 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1710
1711 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1712 "Returning from abort cmd type %x %s\n", task_req,
1713 (ret == SUCCESS) ?
1714 "SUCCESS" : "FAILED");
1715 return ret;
1716 }
1717
1718 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1719 struct scsi_cmnd *sc,
1720 struct fnic_io_req *io_req)
1721 {
1722 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1723 struct Scsi_Host *host = fnic->lport->host;
1724 struct scsi_lun fc_lun;
1725 int ret = 0;
1726 unsigned long intr_flags;
1727
1728 spin_lock_irqsave(host->host_lock, intr_flags);
1729 if (unlikely(fnic_chk_state_flags_locked(fnic,
1730 FNIC_FLAGS_IO_BLOCKED))) {
1731 spin_unlock_irqrestore(host->host_lock, intr_flags);
1732 return FAILED;
1733 } else
1734 atomic_inc(&fnic->in_flight);
1735 spin_unlock_irqrestore(host->host_lock, intr_flags);
1736
1737 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1738
1739 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1740 free_wq_copy_descs(fnic, wq);
1741
1742 if (!vnic_wq_copy_desc_avail(wq)) {
1743 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1744 "queue_dr_io_req failure - no descriptors\n");
1745 ret = -EAGAIN;
1746 goto lr_io_req_end;
1747 }
1748
1749 /* fill in the lun info */
1750 int_to_scsilun(sc->device->lun, &fc_lun);
1751
1752 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1753 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1754 fc_lun.scsi_lun, io_req->port_id,
1755 fnic->config.ra_tov, fnic->config.ed_tov);
1756
1757 lr_io_req_end:
1758 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1759 atomic_dec(&fnic->in_flight);
1760
1761 return ret;
1762 }
1763
1764 /*
1765 * Clean up any pending aborts on the lun
1766 * For each outstanding IO on this lun, whose abort is not completed by fw,
1767 * issue a local abort. Wait for abort to complete. Return 0 if all commands
1768 * successfully aborted, 1 otherwise
1769 */
1770 static int fnic_clean_pending_aborts(struct fnic *fnic,
1771 struct scsi_cmnd *lr_sc)
1772 {
1773 int tag, abt_tag;
1774 struct fnic_io_req *io_req;
1775 spinlock_t *io_lock;
1776 unsigned long flags;
1777 int ret = 0;
1778 struct scsi_cmnd *sc;
1779 struct scsi_lun fc_lun;
1780 struct scsi_device *lun_dev = lr_sc->device;
1781 DECLARE_COMPLETION_ONSTACK(tm_done);
1782 enum fnic_ioreq_state old_ioreq_state;
1783
1784 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1785 io_lock = fnic_io_lock_tag(fnic, tag);
1786 spin_lock_irqsave(io_lock, flags);
1787 sc = scsi_host_find_tag(fnic->lport->host, tag);
1788 /*
1789 * ignore this lun reset cmd or cmds that do not belong to
1790 * this lun
1791 */
1792 if (!sc || sc == lr_sc || sc->device != lun_dev) {
1793 spin_unlock_irqrestore(io_lock, flags);
1794 continue;
1795 }
1796
1797 io_req = (struct fnic_io_req *)CMD_SP(sc);
1798
1799 if (!io_req || sc->device != lun_dev) {
1800 spin_unlock_irqrestore(io_lock, flags);
1801 continue;
1802 }
1803
1804 /*
1805 * Found IO that is still pending with firmware and
1806 * belongs to the LUN that we are resetting
1807 */
1808 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1809 "Found IO in %s on lun\n",
1810 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1811
1812 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1813 spin_unlock_irqrestore(io_lock, flags);
1814 continue;
1815 }
1816 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1817 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1818 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1819 "%s dev rst not pending sc 0x%p\n", __func__,
1820 sc);
1821 spin_unlock_irqrestore(io_lock, flags);
1822 continue;
1823 }
1824
1825 if (io_req->abts_done)
1826 shost_printk(KERN_ERR, fnic->lport->host,
1827 "%s: io_req->abts_done is set state is %s\n",
1828 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
1829 old_ioreq_state = CMD_STATE(sc);
1830 /*
1831 * Any pending IO issued prior to reset is expected to be
1832 * in abts pending state, if not we need to set
1833 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
1834 * When IO is completed, the IO will be handed over and
1835 * handled in this function.
1836 */
1837 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1838
1839 BUG_ON(io_req->abts_done);
1840
1841 abt_tag = tag;
1842 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1843 abt_tag |= FNIC_TAG_DEV_RST;
1844 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1845 "%s: dev rst sc 0x%p\n", __func__, sc);
1846 }
1847
1848 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1849 io_req->abts_done = &tm_done;
1850 spin_unlock_irqrestore(io_lock, flags);
1851
1852 /* Now queue the abort command to firmware */
1853 int_to_scsilun(sc->device->lun, &fc_lun);
1854
1855 if (fnic_queue_abort_io_req(fnic, abt_tag,
1856 FCPIO_ITMF_ABT_TASK_TERM,
1857 fc_lun.scsi_lun, io_req)) {
1858 spin_lock_irqsave(io_lock, flags);
1859 io_req = (struct fnic_io_req *)CMD_SP(sc);
1860 if (io_req)
1861 io_req->abts_done = NULL;
1862 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1863 CMD_STATE(sc) = old_ioreq_state;
1864 spin_unlock_irqrestore(io_lock, flags);
1865 ret = 1;
1866 goto clean_pending_aborts_end;
1867 } else {
1868 spin_lock_irqsave(io_lock, flags);
1869 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1870 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1871 spin_unlock_irqrestore(io_lock, flags);
1872 }
1873 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1874
1875 wait_for_completion_timeout(&tm_done,
1876 msecs_to_jiffies
1877 (fnic->config.ed_tov));
1878
1879 /* Recheck cmd state to check if it is now aborted */
1880 spin_lock_irqsave(io_lock, flags);
1881 io_req = (struct fnic_io_req *)CMD_SP(sc);
1882 if (!io_req) {
1883 spin_unlock_irqrestore(io_lock, flags);
1884 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1885 continue;
1886 }
1887
1888 io_req->abts_done = NULL;
1889
1890 /* if abort is still pending with fw, fail */
1891 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1892 spin_unlock_irqrestore(io_lock, flags);
1893 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1894 ret = 1;
1895 goto clean_pending_aborts_end;
1896 }
1897 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1898 CMD_SP(sc) = NULL;
1899 spin_unlock_irqrestore(io_lock, flags);
1900
1901 fnic_release_ioreq_buf(fnic, io_req, sc);
1902 mempool_free(io_req, fnic->io_req_pool);
1903 }
1904
1905 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
1906
1907 /* walk again to check, if IOs are still pending in fw */
1908 if (fnic_is_abts_pending(fnic, lr_sc))
1909 ret = FAILED;
1910
1911 clean_pending_aborts_end:
1912 return ret;
1913 }
1914
1915 /**
1916 * fnic_scsi_host_start_tag
1917 * Allocates tagid from host's tag list
1918 **/
1919 static inline int
1920 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
1921 {
1922 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
1923 int tag, ret = SCSI_NO_TAG;
1924
1925 BUG_ON(!bqt);
1926 if (!bqt) {
1927 pr_err("Tags are not supported\n");
1928 goto end;
1929 }
1930
1931 do {
1932 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
1933 if (tag >= bqt->max_depth) {
1934 pr_err("Tag allocation failure\n");
1935 goto end;
1936 }
1937 } while (test_and_set_bit(tag, bqt->tag_map));
1938
1939 bqt->tag_index[tag] = sc->request;
1940 sc->request->tag = tag;
1941 sc->tag = tag;
1942 if (!sc->request->special)
1943 sc->request->special = sc;
1944
1945 ret = tag;
1946
1947 end:
1948 return ret;
1949 }
1950
1951 /**
1952 * fnic_scsi_host_end_tag
1953 * frees tag allocated by fnic_scsi_host_start_tag.
1954 **/
1955 static inline void
1956 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
1957 {
1958 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
1959 int tag = sc->request->tag;
1960
1961 if (tag == SCSI_NO_TAG)
1962 return;
1963
1964 BUG_ON(!bqt || !bqt->tag_index[tag]);
1965 if (!bqt)
1966 return;
1967
1968 bqt->tag_index[tag] = NULL;
1969 clear_bit(tag, bqt->tag_map);
1970
1971 return;
1972 }
1973
1974 /*
1975 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1976 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1977 * on the LUN.
1978 */
1979 int fnic_device_reset(struct scsi_cmnd *sc)
1980 {
1981 struct fc_lport *lp;
1982 struct fnic *fnic;
1983 struct fnic_io_req *io_req = NULL;
1984 struct fc_rport *rport;
1985 int status;
1986 int ret = FAILED;
1987 spinlock_t *io_lock;
1988 unsigned long flags;
1989 unsigned long start_time = 0;
1990 struct scsi_lun fc_lun;
1991 int tag = 0;
1992 DECLARE_COMPLETION_ONSTACK(tm_done);
1993 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
1994
1995 /* Wait for rport to unblock */
1996 fc_block_scsi_eh(sc);
1997
1998 /* Get local-port, check ready and link up */
1999 lp = shost_priv(sc->device->host);
2000
2001 fnic = lport_priv(lp);
2002
2003 rport = starget_to_rport(scsi_target(sc->device));
2004 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2005 "Device reset called FCID 0x%x, LUN 0x%x sc 0x%p\n",
2006 rport->port_id, sc->device->lun, sc);
2007
2008 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2009 goto fnic_device_reset_end;
2010
2011 /* Check if remote port up */
2012 if (fc_remote_port_chkready(rport))
2013 goto fnic_device_reset_end;
2014
2015 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2016 /* Allocate tag if not present */
2017
2018 tag = sc->request->tag;
2019 if (unlikely(tag < 0)) {
2020 tag = fnic_scsi_host_start_tag(fnic, sc);
2021 if (unlikely(tag == SCSI_NO_TAG))
2022 goto fnic_device_reset_end;
2023 tag_gen_flag = 1;
2024 }
2025 io_lock = fnic_io_lock_hash(fnic, sc);
2026 spin_lock_irqsave(io_lock, flags);
2027 io_req = (struct fnic_io_req *)CMD_SP(sc);
2028
2029 /*
2030 * If there is a io_req attached to this command, then use it,
2031 * else allocate a new one.
2032 */
2033 if (!io_req) {
2034 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2035 if (!io_req) {
2036 spin_unlock_irqrestore(io_lock, flags);
2037 goto fnic_device_reset_end;
2038 }
2039 memset(io_req, 0, sizeof(*io_req));
2040 io_req->port_id = rport->port_id;
2041 CMD_SP(sc) = (char *)io_req;
2042 }
2043 io_req->dr_done = &tm_done;
2044 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2045 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2046 spin_unlock_irqrestore(io_lock, flags);
2047
2048 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2049
2050 /*
2051 * issue the device reset, if enqueue failed, clean up the ioreq
2052 * and break assoc with scsi cmd
2053 */
2054 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2055 spin_lock_irqsave(io_lock, flags);
2056 io_req = (struct fnic_io_req *)CMD_SP(sc);
2057 if (io_req)
2058 io_req->dr_done = NULL;
2059 goto fnic_device_reset_clean;
2060 }
2061 spin_lock_irqsave(io_lock, flags);
2062 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2063 spin_unlock_irqrestore(io_lock, flags);
2064
2065 /*
2066 * Wait on the local completion for LUN reset. The io_req may be
2067 * freed while we wait since we hold no lock.
2068 */
2069 wait_for_completion_timeout(&tm_done,
2070 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2071
2072 spin_lock_irqsave(io_lock, flags);
2073 io_req = (struct fnic_io_req *)CMD_SP(sc);
2074 if (!io_req) {
2075 spin_unlock_irqrestore(io_lock, flags);
2076 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2077 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2078 goto fnic_device_reset_end;
2079 }
2080 io_req->dr_done = NULL;
2081
2082 status = CMD_LR_STATUS(sc);
2083
2084 /*
2085 * If lun reset not completed, bail out with failed. io_req
2086 * gets cleaned up during higher levels of EH
2087 */
2088 if (status == FCPIO_INVALID_CODE) {
2089 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2090 "Device reset timed out\n");
2091 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2092 spin_unlock_irqrestore(io_lock, flags);
2093 int_to_scsilun(sc->device->lun, &fc_lun);
2094 /*
2095 * Issue abort and terminate on device reset request.
2096 * If q'ing of terminate fails, retry it after a delay.
2097 */
2098 while (1) {
2099 spin_lock_irqsave(io_lock, flags);
2100 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2101 spin_unlock_irqrestore(io_lock, flags);
2102 break;
2103 }
2104 spin_unlock_irqrestore(io_lock, flags);
2105 if (fnic_queue_abort_io_req(fnic,
2106 tag | FNIC_TAG_DEV_RST,
2107 FCPIO_ITMF_ABT_TASK_TERM,
2108 fc_lun.scsi_lun, io_req)) {
2109 wait_for_completion_timeout(&tm_done,
2110 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2111 } else {
2112 spin_lock_irqsave(io_lock, flags);
2113 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2114 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2115 io_req->abts_done = &tm_done;
2116 spin_unlock_irqrestore(io_lock, flags);
2117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2118 "Abort and terminate issued on Device reset "
2119 "tag 0x%x sc 0x%p\n", tag, sc);
2120 break;
2121 }
2122 }
2123 while (1) {
2124 spin_lock_irqsave(io_lock, flags);
2125 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2126 spin_unlock_irqrestore(io_lock, flags);
2127 wait_for_completion_timeout(&tm_done,
2128 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2129 break;
2130 } else {
2131 io_req = (struct fnic_io_req *)CMD_SP(sc);
2132 io_req->abts_done = NULL;
2133 goto fnic_device_reset_clean;
2134 }
2135 }
2136 } else {
2137 spin_unlock_irqrestore(io_lock, flags);
2138 }
2139
2140 /* Completed, but not successful, clean up the io_req, return fail */
2141 if (status != FCPIO_SUCCESS) {
2142 spin_lock_irqsave(io_lock, flags);
2143 FNIC_SCSI_DBG(KERN_DEBUG,
2144 fnic->lport->host,
2145 "Device reset completed - failed\n");
2146 io_req = (struct fnic_io_req *)CMD_SP(sc);
2147 goto fnic_device_reset_clean;
2148 }
2149
2150 /*
2151 * Clean up any aborts on this lun that have still not
2152 * completed. If any of these fail, then LUN reset fails.
2153 * clean_pending_aborts cleans all cmds on this lun except
2154 * the lun reset cmd. If all cmds get cleaned, the lun reset
2155 * succeeds
2156 */
2157 if (fnic_clean_pending_aborts(fnic, sc)) {
2158 spin_lock_irqsave(io_lock, flags);
2159 io_req = (struct fnic_io_req *)CMD_SP(sc);
2160 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2161 "Device reset failed"
2162 " since could not abort all IOs\n");
2163 goto fnic_device_reset_clean;
2164 }
2165
2166 /* Clean lun reset command */
2167 spin_lock_irqsave(io_lock, flags);
2168 io_req = (struct fnic_io_req *)CMD_SP(sc);
2169 if (io_req)
2170 /* Completed, and successful */
2171 ret = SUCCESS;
2172
2173 fnic_device_reset_clean:
2174 if (io_req)
2175 CMD_SP(sc) = NULL;
2176
2177 spin_unlock_irqrestore(io_lock, flags);
2178
2179 if (io_req) {
2180 start_time = io_req->start_time;
2181 fnic_release_ioreq_buf(fnic, io_req, sc);
2182 mempool_free(io_req, fnic->io_req_pool);
2183 }
2184
2185 fnic_device_reset_end:
2186 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2187 sc->request->tag, sc,
2188 jiffies_to_msecs(jiffies - start_time),
2189 0, ((u64)sc->cmnd[0] << 32 |
2190 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2191 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2192 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2193
2194 /* free tag if it is allocated */
2195 if (unlikely(tag_gen_flag))
2196 fnic_scsi_host_end_tag(fnic, sc);
2197
2198 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2199 "Returning from device reset %s\n",
2200 (ret == SUCCESS) ?
2201 "SUCCESS" : "FAILED");
2202 return ret;
2203 }
2204
2205 /* Clean up all IOs, clean up libFC local port */
2206 int fnic_reset(struct Scsi_Host *shost)
2207 {
2208 struct fc_lport *lp;
2209 struct fnic *fnic;
2210 int ret = SUCCESS;
2211
2212 lp = shost_priv(shost);
2213 fnic = lport_priv(lp);
2214
2215 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2216 "fnic_reset called\n");
2217
2218 /*
2219 * Reset local port, this will clean up libFC exchanges,
2220 * reset remote port sessions, and if link is up, begin flogi
2221 */
2222 if (lp->tt.lport_reset(lp))
2223 ret = FAILED;
2224
2225 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2226 "Returning from fnic reset %s\n",
2227 (ret == SUCCESS) ?
2228 "SUCCESS" : "FAILED");
2229
2230 return ret;
2231 }
2232
2233 /*
2234 * SCSI Error handling calls driver's eh_host_reset if all prior
2235 * error handling levels return FAILED. If host reset completes
2236 * successfully, and if link is up, then Fabric login begins.
2237 *
2238 * Host Reset is the highest level of error recovery. If this fails, then
2239 * host is offlined by SCSI.
2240 *
2241 */
2242 int fnic_host_reset(struct scsi_cmnd *sc)
2243 {
2244 int ret;
2245 unsigned long wait_host_tmo;
2246 struct Scsi_Host *shost = sc->device->host;
2247 struct fc_lport *lp = shost_priv(shost);
2248
2249 /*
2250 * If fnic_reset is successful, wait for fabric login to complete
2251 * scsi-ml tries to send a TUR to every device if host reset is
2252 * successful, so before returning to scsi, fabric should be up
2253 */
2254 ret = fnic_reset(shost);
2255 if (ret == SUCCESS) {
2256 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2257 ret = FAILED;
2258 while (time_before(jiffies, wait_host_tmo)) {
2259 if ((lp->state == LPORT_ST_READY) &&
2260 (lp->link_up)) {
2261 ret = SUCCESS;
2262 break;
2263 }
2264 ssleep(1);
2265 }
2266 }
2267
2268 return ret;
2269 }
2270
2271 /*
2272 * This fxn is called from libFC when host is removed
2273 */
2274 void fnic_scsi_abort_io(struct fc_lport *lp)
2275 {
2276 int err = 0;
2277 unsigned long flags;
2278 enum fnic_state old_state;
2279 struct fnic *fnic = lport_priv(lp);
2280 DECLARE_COMPLETION_ONSTACK(remove_wait);
2281
2282 /* Issue firmware reset for fnic, wait for reset to complete */
2283 retry_fw_reset:
2284 spin_lock_irqsave(&fnic->fnic_lock, flags);
2285 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2286 /* fw reset is in progress, poll for its completion */
2287 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2288 schedule_timeout(msecs_to_jiffies(100));
2289 goto retry_fw_reset;
2290 }
2291
2292 fnic->remove_wait = &remove_wait;
2293 old_state = fnic->state;
2294 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2295 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2296 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2297
2298 err = fnic_fw_reset_handler(fnic);
2299 if (err) {
2300 spin_lock_irqsave(&fnic->fnic_lock, flags);
2301 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2302 fnic->state = old_state;
2303 fnic->remove_wait = NULL;
2304 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2305 return;
2306 }
2307
2308 /* Wait for firmware reset to complete */
2309 wait_for_completion_timeout(&remove_wait,
2310 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2311
2312 spin_lock_irqsave(&fnic->fnic_lock, flags);
2313 fnic->remove_wait = NULL;
2314 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2315 "fnic_scsi_abort_io %s\n",
2316 (fnic->state == FNIC_IN_ETH_MODE) ?
2317 "SUCCESS" : "FAILED");
2318 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2319
2320 }
2321
2322 /*
2323 * This fxn called from libFC to clean up driver IO state on link down
2324 */
2325 void fnic_scsi_cleanup(struct fc_lport *lp)
2326 {
2327 unsigned long flags;
2328 enum fnic_state old_state;
2329 struct fnic *fnic = lport_priv(lp);
2330
2331 /* issue fw reset */
2332 retry_fw_reset:
2333 spin_lock_irqsave(&fnic->fnic_lock, flags);
2334 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2335 /* fw reset is in progress, poll for its completion */
2336 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2337 schedule_timeout(msecs_to_jiffies(100));
2338 goto retry_fw_reset;
2339 }
2340 old_state = fnic->state;
2341 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2342 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2343 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2344
2345 if (fnic_fw_reset_handler(fnic)) {
2346 spin_lock_irqsave(&fnic->fnic_lock, flags);
2347 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2348 fnic->state = old_state;
2349 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2350 }
2351
2352 }
2353
2354 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2355 {
2356 }
2357
2358 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2359 {
2360 struct fnic *fnic = lport_priv(lp);
2361
2362 /* Non-zero sid, nothing to do */
2363 if (sid)
2364 goto call_fc_exch_mgr_reset;
2365
2366 if (did) {
2367 fnic_rport_exch_reset(fnic, did);
2368 goto call_fc_exch_mgr_reset;
2369 }
2370
2371 /*
2372 * sid = 0, did = 0
2373 * link down or device being removed
2374 */
2375 if (!fnic->in_remove)
2376 fnic_scsi_cleanup(lp);
2377 else
2378 fnic_scsi_abort_io(lp);
2379
2380 /* call libFC exch mgr reset to reset its exchanges */
2381 call_fc_exch_mgr_reset:
2382 fc_exch_mgr_reset(lp, sid, did);
2383
2384 }
2385
2386 /*
2387 * fnic_is_abts_pending() is a helper function that
2388 * walks through tag map to check if there is any IOs pending,if there is one,
2389 * then it returns 1 (true), otherwise 0 (false)
2390 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2391 * otherwise, it checks for all IOs.
2392 */
2393 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2394 {
2395 int tag;
2396 struct fnic_io_req *io_req;
2397 spinlock_t *io_lock;
2398 unsigned long flags;
2399 int ret = 0;
2400 struct scsi_cmnd *sc;
2401 struct scsi_device *lun_dev = NULL;
2402
2403 if (lr_sc)
2404 lun_dev = lr_sc->device;
2405
2406 /* walk again to check, if IOs are still pending in fw */
2407 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2408 sc = scsi_host_find_tag(fnic->lport->host, tag);
2409 /*
2410 * ignore this lun reset cmd or cmds that do not belong to
2411 * this lun
2412 */
2413 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2414 continue;
2415
2416 io_lock = fnic_io_lock_hash(fnic, sc);
2417 spin_lock_irqsave(io_lock, flags);
2418
2419 io_req = (struct fnic_io_req *)CMD_SP(sc);
2420
2421 if (!io_req || sc->device != lun_dev) {
2422 spin_unlock_irqrestore(io_lock, flags);
2423 continue;
2424 }
2425
2426 /*
2427 * Found IO that is still pending with firmware and
2428 * belongs to the LUN that we are resetting
2429 */
2430 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2431 "Found IO in %s on lun\n",
2432 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2433
2434 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2435 ret = 1;
2436 spin_unlock_irqrestore(io_lock, flags);
2437 }
2438
2439 return ret;
2440 }
Linux with added FPC-III support