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ARM: mcpm: introduce helpers for platform coherency exit/setup
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_scsi.c
blobbe99e7549d891a011c75033ae0c0c535385a4260
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 /*
115 * Unmap the data buffer and sense buffer for an io_req,
116 * also unmap and free the device-private scatter/gather list.
117 */
118 static void fnic_release_ioreq_buf(struct fnic *fnic,
119 struct fnic_io_req *io_req,
120 struct scsi_cmnd *sc)
121 {
122 if (io_req->sgl_list_pa)
123 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
124 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
125 PCI_DMA_TODEVICE);
126 scsi_dma_unmap(sc);
127
128 if (io_req->sgl_cnt)
129 mempool_free(io_req->sgl_list_alloc,
130 fnic->io_sgl_pool[io_req->sgl_type]);
131 if (io_req->sense_buf_pa)
132 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
133 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
134 }
135
136 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
137 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
138 {
139 /* if no Ack received from firmware, then nothing to clean */
140 if (!fnic->fw_ack_recd[0])
141 return 1;
142
143 /*
144 * Update desc_available count based on number of freed descriptors
145 * Account for wraparound
146 */
147 if (wq->to_clean_index <= fnic->fw_ack_index[0])
148 wq->ring.desc_avail += (fnic->fw_ack_index[0]
149 - wq->to_clean_index + 1);
150 else
151 wq->ring.desc_avail += (wq->ring.desc_count
152 - wq->to_clean_index
153 + fnic->fw_ack_index[0] + 1);
154
155 /*
156 * just bump clean index to ack_index+1 accounting for wraparound
157 * this will essentially free up all descriptors between
158 * to_clean_index and fw_ack_index, both inclusive
159 */
160 wq->to_clean_index =
161 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
162
163 /* we have processed the acks received so far */
164 fnic->fw_ack_recd[0] = 0;
165 return 0;
166 }
167
168
169 /**
170 * __fnic_set_state_flags
171 * Sets/Clears bits in fnic's state_flags
172 **/
173 void
174 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
175 unsigned long clearbits)
176 {
177 struct Scsi_Host *host = fnic->lport->host;
178 int sh_locked = spin_is_locked(host->host_lock);
179 unsigned long flags = 0;
180
181 if (!sh_locked)
182 spin_lock_irqsave(host->host_lock, flags);
183
184 if (clearbits)
185 fnic->state_flags &= ~st_flags;
186 else
187 fnic->state_flags |= st_flags;
188
189 if (!sh_locked)
190 spin_unlock_irqrestore(host->host_lock, flags);
191
192 return;
193 }
194
195
196 /*
197 * fnic_fw_reset_handler
198 * Routine to send reset msg to fw
199 */
200 int fnic_fw_reset_handler(struct fnic *fnic)
201 {
202 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
203 int ret = 0;
204 unsigned long flags;
205
206 /* indicate fwreset to io path */
207 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
208
209 skb_queue_purge(&fnic->frame_queue);
210 skb_queue_purge(&fnic->tx_queue);
211
212 /* wait for io cmpl */
213 while (atomic_read(&fnic->in_flight))
214 schedule_timeout(msecs_to_jiffies(1));
215
216 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
217
218 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
219 free_wq_copy_descs(fnic, wq);
220
221 if (!vnic_wq_copy_desc_avail(wq))
222 ret = -EAGAIN;
223 else
224 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
225
226 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
227
228 if (!ret)
229 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
230 "Issued fw reset\n");
231 else {
232 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
233 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
234 "Failed to issue fw reset\n");
235 }
236
237 return ret;
238 }
239
240
241 /*
242 * fnic_flogi_reg_handler
243 * Routine to send flogi register msg to fw
244 */
245 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
246 {
247 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
248 enum fcpio_flogi_reg_format_type format;
249 struct fc_lport *lp = fnic->lport;
250 u8 gw_mac[ETH_ALEN];
251 int ret = 0;
252 unsigned long flags;
253
254 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
255
256 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
257 free_wq_copy_descs(fnic, wq);
258
259 if (!vnic_wq_copy_desc_avail(wq)) {
260 ret = -EAGAIN;
261 goto flogi_reg_ioreq_end;
262 }
263
264 if (fnic->ctlr.map_dest) {
265 memset(gw_mac, 0xff, ETH_ALEN);
266 format = FCPIO_FLOGI_REG_DEF_DEST;
267 } else {
268 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
269 format = FCPIO_FLOGI_REG_GW_DEST;
270 }
271
272 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
273 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
274 fc_id, gw_mac,
275 fnic->data_src_addr,
276 lp->r_a_tov, lp->e_d_tov);
277 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
278 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
279 fc_id, fnic->data_src_addr, gw_mac);
280 } else {
281 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
282 format, fc_id, gw_mac);
283 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
284 "FLOGI reg issued fcid %x map %d dest %pM\n",
285 fc_id, fnic->ctlr.map_dest, gw_mac);
286 }
287
288 flogi_reg_ioreq_end:
289 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
290 return ret;
291 }
292
293 /*
294 * fnic_queue_wq_copy_desc
295 * Routine to enqueue a wq copy desc
296 */
297 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
298 struct vnic_wq_copy *wq,
299 struct fnic_io_req *io_req,
300 struct scsi_cmnd *sc,
301 int sg_count)
302 {
303 struct scatterlist *sg;
304 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
305 struct fc_rport_libfc_priv *rp = rport->dd_data;
306 struct host_sg_desc *desc;
307 u8 pri_tag = 0;
308 unsigned int i;
309 unsigned long intr_flags;
310 int flags;
311 u8 exch_flags;
312 struct scsi_lun fc_lun;
313 char msg[2];
314
315 if (sg_count) {
316 /* For each SGE, create a device desc entry */
317 desc = io_req->sgl_list;
318 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
319 desc->addr = cpu_to_le64(sg_dma_address(sg));
320 desc->len = cpu_to_le32(sg_dma_len(sg));
321 desc->_resvd = 0;
322 desc++;
323 }
324
325 io_req->sgl_list_pa = pci_map_single
326 (fnic->pdev,
327 io_req->sgl_list,
328 sizeof(io_req->sgl_list[0]) * sg_count,
329 PCI_DMA_TODEVICE);
330 }
331
332 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
333 sc->sense_buffer,
334 SCSI_SENSE_BUFFERSIZE,
335 PCI_DMA_FROMDEVICE);
336
337 int_to_scsilun(sc->device->lun, &fc_lun);
338
339 pri_tag = FCPIO_ICMND_PTA_SIMPLE;
340 msg[0] = MSG_SIMPLE_TAG;
341 scsi_populate_tag_msg(sc, msg);
342 if (msg[0] == MSG_ORDERED_TAG)
343 pri_tag = FCPIO_ICMND_PTA_ORDERED;
344
345 /* Enqueue the descriptor in the Copy WQ */
346 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
347
348 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
349 free_wq_copy_descs(fnic, wq);
350
351 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
352 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
353 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
354 "fnic_queue_wq_copy_desc failure - no descriptors\n");
355 return SCSI_MLQUEUE_HOST_BUSY;
356 }
357
358 flags = 0;
359 if (sc->sc_data_direction == DMA_FROM_DEVICE)
360 flags = FCPIO_ICMND_RDDATA;
361 else if (sc->sc_data_direction == DMA_TO_DEVICE)
362 flags = FCPIO_ICMND_WRDATA;
363
364 exch_flags = 0;
365 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
366 (rp->flags & FC_RP_FLAGS_RETRY))
367 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
368
369 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
370 0, exch_flags, io_req->sgl_cnt,
371 SCSI_SENSE_BUFFERSIZE,
372 io_req->sgl_list_pa,
373 io_req->sense_buf_pa,
374 0, /* scsi cmd ref, always 0 */
375 pri_tag, /* scsi pri and tag */
376 flags, /* command flags */
377 sc->cmnd, sc->cmd_len,
378 scsi_bufflen(sc),
379 fc_lun.scsi_lun, io_req->port_id,
380 rport->maxframe_size, rp->r_a_tov,
381 rp->e_d_tov);
382
383 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
384 return 0;
385 }
386
387 /*
388 * fnic_queuecommand
389 * Routine to send a scsi cdb
390 * Called with host_lock held and interrupts disabled.
391 */
392 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
393 {
394 struct fc_lport *lp = shost_priv(sc->device->host);
395 struct fc_rport *rport;
396 struct fnic_io_req *io_req = NULL;
397 struct fnic *fnic = lport_priv(lp);
398 struct vnic_wq_copy *wq;
399 int ret;
400 u64 cmd_trace;
401 int sg_count = 0;
402 unsigned long flags;
403 unsigned long ptr;
404
405 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
406 return SCSI_MLQUEUE_HOST_BUSY;
407
408 rport = starget_to_rport(scsi_target(sc->device));
409 ret = fc_remote_port_chkready(rport);
410 if (ret) {
411 sc->result = ret;
412 done(sc);
413 return 0;
414 }
415
416 if (lp->state != LPORT_ST_READY || !(lp->link_up))
417 return SCSI_MLQUEUE_HOST_BUSY;
418
419 atomic_inc(&fnic->in_flight);
420
421 /*
422 * Release host lock, use driver resource specific locks from here.
423 * Don't re-enable interrupts in case they were disabled prior to the
424 * caller disabling them.
425 */
426 spin_unlock(lp->host->host_lock);
427 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
428 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
429
430 /* Get a new io_req for this SCSI IO */
431 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
432 if (!io_req) {
433 ret = SCSI_MLQUEUE_HOST_BUSY;
434 goto out;
435 }
436 memset(io_req, 0, sizeof(*io_req));
437
438 /* Map the data buffer */
439 sg_count = scsi_dma_map(sc);
440 if (sg_count < 0) {
441 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
442 sc->request->tag, sc, 0, sc->cmnd[0],
443 sg_count, CMD_STATE(sc));
444 mempool_free(io_req, fnic->io_req_pool);
445 goto out;
446 }
447
448 /* Determine the type of scatter/gather list we need */
449 io_req->sgl_cnt = sg_count;
450 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
451 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
452 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
453
454 if (sg_count) {
455 io_req->sgl_list =
456 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
457 GFP_ATOMIC);
458 if (!io_req->sgl_list) {
459 ret = SCSI_MLQUEUE_HOST_BUSY;
460 scsi_dma_unmap(sc);
461 mempool_free(io_req, fnic->io_req_pool);
462 goto out;
463 }
464
465 /* Cache sgl list allocated address before alignment */
466 io_req->sgl_list_alloc = io_req->sgl_list;
467 ptr = (unsigned long) io_req->sgl_list;
468 if (ptr % FNIC_SG_DESC_ALIGN) {
469 io_req->sgl_list = (struct host_sg_desc *)
470 (((unsigned long) ptr
471 + FNIC_SG_DESC_ALIGN - 1)
472 & ~(FNIC_SG_DESC_ALIGN - 1));
473 }
474 }
475
476 /* initialize rest of io_req */
477 io_req->port_id = rport->port_id;
478 io_req->start_time = jiffies;
479 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
480 CMD_SP(sc) = (char *)io_req;
481 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
482 sc->scsi_done = done;
483
484 /* create copy wq desc and enqueue it */
485 wq = &fnic->wq_copy[0];
486 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
487 if (ret) {
488 /*
489 * In case another thread cancelled the request,
490 * refetch the pointer under the lock.
491 */
492 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
493 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
494 sc->request->tag, sc, 0, 0, 0,
495 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
496 spin_lock_irqsave(io_lock, flags);
497 io_req = (struct fnic_io_req *)CMD_SP(sc);
498 CMD_SP(sc) = NULL;
499 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
500 spin_unlock_irqrestore(io_lock, flags);
501 if (io_req) {
502 fnic_release_ioreq_buf(fnic, io_req, sc);
503 mempool_free(io_req, fnic->io_req_pool);
504 }
505 } else {
506 /* REVISIT: Use per IO lock in the final code */
507 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
508 }
509 out:
510 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
511 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
512 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
513 sc->cmnd[5]);
514
515 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
516 sc->request->tag, sc, io_req,
517 sg_count, cmd_trace,
518 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
519 atomic_dec(&fnic->in_flight);
520 /* acquire host lock before returning to SCSI */
521 spin_lock(lp->host->host_lock);
522 return ret;
523 }
524
525 DEF_SCSI_QCMD(fnic_queuecommand)
526
527 /*
528 * fnic_fcpio_fw_reset_cmpl_handler
529 * Routine to handle fw reset completion
530 */
531 static int fnic_fcpio_fw_reset_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 unsigned long flags;
539
540 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
541
542 /* Clean up all outstanding io requests */
543 fnic_cleanup_io(fnic, SCSI_NO_TAG);
544
545 spin_lock_irqsave(&fnic->fnic_lock, flags);
546
547 /* fnic should be in FC_TRANS_ETH_MODE */
548 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
549 /* Check status of reset completion */
550 if (!hdr_status) {
551 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
552 "reset cmpl success\n");
553 /* Ready to send flogi out */
554 fnic->state = FNIC_IN_ETH_MODE;
555 } else {
556 FNIC_SCSI_DBG(KERN_DEBUG,
557 fnic->lport->host,
558 "fnic fw_reset : failed %s\n",
559 fnic_fcpio_status_to_str(hdr_status));
560
561 /*
562 * Unable to change to eth mode, cannot send out flogi
563 * Change state to fc mode, so that subsequent Flogi
564 * requests from libFC will cause more attempts to
565 * reset the firmware. Free the cached flogi
566 */
567 fnic->state = FNIC_IN_FC_MODE;
568 ret = -1;
569 }
570 } else {
571 FNIC_SCSI_DBG(KERN_DEBUG,
572 fnic->lport->host,
573 "Unexpected state %s while processing"
574 " reset cmpl\n", fnic_state_to_str(fnic->state));
575 ret = -1;
576 }
577
578 /* Thread removing device blocks till firmware reset is complete */
579 if (fnic->remove_wait)
580 complete(fnic->remove_wait);
581
582 /*
583 * If fnic is being removed, or fw reset failed
584 * free the flogi frame. Else, send it out
585 */
586 if (fnic->remove_wait || ret) {
587 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
588 skb_queue_purge(&fnic->tx_queue);
589 goto reset_cmpl_handler_end;
590 }
591
592 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
593
594 fnic_flush_tx(fnic);
595
596 reset_cmpl_handler_end:
597 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
598
599 return ret;
600 }
601
602 /*
603 * fnic_fcpio_flogi_reg_cmpl_handler
604 * Routine to handle flogi register completion
605 */
606 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
607 struct fcpio_fw_req *desc)
608 {
609 u8 type;
610 u8 hdr_status;
611 struct fcpio_tag tag;
612 int ret = 0;
613 unsigned long flags;
614
615 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
616
617 /* Update fnic state based on status of flogi reg completion */
618 spin_lock_irqsave(&fnic->fnic_lock, flags);
619
620 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
621
622 /* Check flogi registration completion status */
623 if (!hdr_status) {
624 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
625 "flog reg succeeded\n");
626 fnic->state = FNIC_IN_FC_MODE;
627 } else {
628 FNIC_SCSI_DBG(KERN_DEBUG,
629 fnic->lport->host,
630 "fnic flogi reg :failed %s\n",
631 fnic_fcpio_status_to_str(hdr_status));
632 fnic->state = FNIC_IN_ETH_MODE;
633 ret = -1;
634 }
635 } else {
636 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
637 "Unexpected fnic state %s while"
638 " processing flogi reg completion\n",
639 fnic_state_to_str(fnic->state));
640 ret = -1;
641 }
642
643 if (!ret) {
644 if (fnic->stop_rx_link_events) {
645 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
646 goto reg_cmpl_handler_end;
647 }
648 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
649
650 fnic_flush_tx(fnic);
651 queue_work(fnic_event_queue, &fnic->frame_work);
652 } else {
653 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
654 }
655
656 reg_cmpl_handler_end:
657 return ret;
658 }
659
660 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
661 u16 request_out)
662 {
663 if (wq->to_clean_index <= wq->to_use_index) {
664 /* out of range, stale request_out index */
665 if (request_out < wq->to_clean_index ||
666 request_out >= wq->to_use_index)
667 return 0;
668 } else {
669 /* out of range, stale request_out index */
670 if (request_out < wq->to_clean_index &&
671 request_out >= wq->to_use_index)
672 return 0;
673 }
674 /* request_out index is in range */
675 return 1;
676 }
677
678
679 /*
680 * Mark that ack received and store the Ack index. If there are multiple
681 * acks received before Tx thread cleans it up, the latest value will be
682 * used which is correct behavior. This state should be in the copy Wq
683 * instead of in the fnic
684 */
685 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
686 unsigned int cq_index,
687 struct fcpio_fw_req *desc)
688 {
689 struct vnic_wq_copy *wq;
690 u16 request_out = desc->u.ack.request_out;
691 unsigned long flags;
692 u64 *ox_id_tag = (u64 *)(void *)desc;
693
694 /* mark the ack state */
695 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
696 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
697
698 if (is_ack_index_in_range(wq, request_out)) {
699 fnic->fw_ack_index[0] = request_out;
700 fnic->fw_ack_recd[0] = 1;
701 }
702 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
703 FNIC_TRACE(fnic_fcpio_ack_handler,
704 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
705 ox_id_tag[4], ox_id_tag[5]);
706 }
707
708 /*
709 * fnic_fcpio_icmnd_cmpl_handler
710 * Routine to handle icmnd completions
711 */
712 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
713 struct fcpio_fw_req *desc)
714 {
715 u8 type;
716 u8 hdr_status;
717 struct fcpio_tag tag;
718 u32 id;
719 u64 xfer_len = 0;
720 struct fcpio_icmnd_cmpl *icmnd_cmpl;
721 struct fnic_io_req *io_req;
722 struct scsi_cmnd *sc;
723 unsigned long flags;
724 spinlock_t *io_lock;
725 u64 cmd_trace;
726 unsigned long start_time;
727
728 /* Decode the cmpl description to get the io_req id */
729 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
730 fcpio_tag_id_dec(&tag, &id);
731 icmnd_cmpl = &desc->u.icmnd_cmpl;
732
733 if (id >= FNIC_MAX_IO_REQ) {
734 shost_printk(KERN_ERR, fnic->lport->host,
735 "Tag out of range tag %x hdr status = %s\n",
736 id, fnic_fcpio_status_to_str(hdr_status));
737 return;
738 }
739
740 sc = scsi_host_find_tag(fnic->lport->host, id);
741 WARN_ON_ONCE(!sc);
742 if (!sc) {
743 shost_printk(KERN_ERR, fnic->lport->host,
744 "icmnd_cmpl sc is null - "
745 "hdr status = %s tag = 0x%x desc = 0x%p\n",
746 fnic_fcpio_status_to_str(hdr_status), id, desc);
747 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
748 fnic->lport->host->host_no, id,
749 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
750 (u64)icmnd_cmpl->_resvd0[0]),
751 ((u64)hdr_status << 16 |
752 (u64)icmnd_cmpl->scsi_status << 8 |
753 (u64)icmnd_cmpl->flags), desc,
754 (u64)icmnd_cmpl->residual, 0);
755 return;
756 }
757
758 io_lock = fnic_io_lock_hash(fnic, sc);
759 spin_lock_irqsave(io_lock, flags);
760 io_req = (struct fnic_io_req *)CMD_SP(sc);
761 WARN_ON_ONCE(!io_req);
762 if (!io_req) {
763 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
764 spin_unlock_irqrestore(io_lock, flags);
765 shost_printk(KERN_ERR, fnic->lport->host,
766 "icmnd_cmpl io_req is null - "
767 "hdr status = %s tag = 0x%x sc 0x%p\n",
768 fnic_fcpio_status_to_str(hdr_status), id, sc);
769 return;
770 }
771 start_time = io_req->start_time;
772
773 /* firmware completed the io */
774 io_req->io_completed = 1;
775
776 /*
777 * if SCSI-ML has already issued abort on this command,
778 * ignore completion of the IO. The abts path will clean it up
779 */
780 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
781 spin_unlock_irqrestore(io_lock, flags);
782 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
783 switch (hdr_status) {
784 case FCPIO_SUCCESS:
785 CMD_FLAGS(sc) |= FNIC_IO_DONE;
786 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
787 "icmnd_cmpl ABTS pending hdr status = %s "
788 "sc 0x%p scsi_status %x residual %d\n",
789 fnic_fcpio_status_to_str(hdr_status), sc,
790 icmnd_cmpl->scsi_status,
791 icmnd_cmpl->residual);
792 break;
793 case FCPIO_ABORTED:
794 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
795 break;
796 default:
797 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
798 "icmnd_cmpl abts pending "
799 "hdr status = %s tag = 0x%x sc = 0x%p\n",
800 fnic_fcpio_status_to_str(hdr_status),
801 id, sc);
802 break;
803 }
804 return;
805 }
806
807 /* Mark the IO as complete */
808 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
809
810 icmnd_cmpl = &desc->u.icmnd_cmpl;
811
812 switch (hdr_status) {
813 case FCPIO_SUCCESS:
814 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
815 xfer_len = scsi_bufflen(sc);
816 scsi_set_resid(sc, icmnd_cmpl->residual);
817
818 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
819 xfer_len -= icmnd_cmpl->residual;
820
821 /*
822 * If queue_full, then try to reduce queue depth for all
823 * LUNS on the target. Todo: this should be accompanied
824 * by a periodic queue_depth rampup based on successful
825 * IO completion.
826 */
827 if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
828 struct scsi_device *t_sdev;
829 int qd = 0;
830
831 shost_for_each_device(t_sdev, sc->device->host) {
832 if (t_sdev->id != sc->device->id)
833 continue;
834
835 if (t_sdev->queue_depth > 1) {
836 qd = scsi_track_queue_full
837 (t_sdev,
838 t_sdev->queue_depth - 1);
839 if (qd == -1)
840 qd = t_sdev->host->cmd_per_lun;
841 shost_printk(KERN_INFO,
842 fnic->lport->host,
843 "scsi[%d:%d:%d:%d"
844 "] queue full detected,"
845 "new depth = %d\n",
846 t_sdev->host->host_no,
847 t_sdev->channel,
848 t_sdev->id, t_sdev->lun,
849 t_sdev->queue_depth);
850 }
851 }
852 }
853 break;
854
855 case FCPIO_TIMEOUT: /* request was timed out */
856 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
857 break;
858
859 case FCPIO_ABORTED: /* request was aborted */
860 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
861 break;
862
863 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
864 scsi_set_resid(sc, icmnd_cmpl->residual);
865 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
866 break;
867
868 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
869 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
870 break;
871 case FCPIO_INVALID_HEADER: /* header contains invalid data */
872 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
873 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
874 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
875 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
876 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
877 case FCPIO_FW_ERR: /* request was terminated due fw error */
878 default:
879 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
880 fnic_fcpio_status_to_str(hdr_status));
881 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
882 break;
883 }
884
885 /* Break link with the SCSI command */
886 CMD_SP(sc) = NULL;
887 CMD_FLAGS(sc) |= FNIC_IO_DONE;
888
889 spin_unlock_irqrestore(io_lock, flags);
890
891 fnic_release_ioreq_buf(fnic, io_req, sc);
892
893 mempool_free(io_req, fnic->io_req_pool);
894
895 cmd_trace = ((u64)hdr_status << 56) |
896 (u64)icmnd_cmpl->scsi_status << 48 |
897 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
898 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
899 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
900
901 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
902 sc->device->host->host_no, id, sc,
903 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
904 (u64)icmnd_cmpl->_resvd0[0] << 48 |
905 jiffies_to_msecs(jiffies - start_time)),
906 desc, cmd_trace,
907 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
908
909 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
910 fnic->lport->host_stats.fcp_input_requests++;
911 fnic->fcp_input_bytes += xfer_len;
912 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
913 fnic->lport->host_stats.fcp_output_requests++;
914 fnic->fcp_output_bytes += xfer_len;
915 } else
916 fnic->lport->host_stats.fcp_control_requests++;
917
918 /* Call SCSI completion function to complete the IO */
919 if (sc->scsi_done)
920 sc->scsi_done(sc);
921 }
922
923 /* fnic_fcpio_itmf_cmpl_handler
924 * Routine to handle itmf completions
925 */
926 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
927 struct fcpio_fw_req *desc)
928 {
929 u8 type;
930 u8 hdr_status;
931 struct fcpio_tag tag;
932 u32 id;
933 struct scsi_cmnd *sc;
934 struct fnic_io_req *io_req;
935 unsigned long flags;
936 spinlock_t *io_lock;
937 unsigned long start_time;
938
939 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
940 fcpio_tag_id_dec(&tag, &id);
941
942 if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ) {
943 shost_printk(KERN_ERR, fnic->lport->host,
944 "Tag out of range tag %x hdr status = %s\n",
945 id, fnic_fcpio_status_to_str(hdr_status));
946 return;
947 }
948
949 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
950 WARN_ON_ONCE(!sc);
951 if (!sc) {
952 shost_printk(KERN_ERR, fnic->lport->host,
953 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
954 fnic_fcpio_status_to_str(hdr_status), id);
955 return;
956 }
957 io_lock = fnic_io_lock_hash(fnic, sc);
958 spin_lock_irqsave(io_lock, flags);
959 io_req = (struct fnic_io_req *)CMD_SP(sc);
960 WARN_ON_ONCE(!io_req);
961 if (!io_req) {
962 spin_unlock_irqrestore(io_lock, flags);
963 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
964 shost_printk(KERN_ERR, fnic->lport->host,
965 "itmf_cmpl io_req is null - "
966 "hdr status = %s tag = 0x%x sc 0x%p\n",
967 fnic_fcpio_status_to_str(hdr_status), id, sc);
968 return;
969 }
970 start_time = io_req->start_time;
971
972 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
973 /* Abort and terminate completion of device reset req */
974 /* REVISIT : Add asserts about various flags */
975 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
976 "dev reset abts cmpl recd. id %x status %s\n",
977 id, fnic_fcpio_status_to_str(hdr_status));
978 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
979 CMD_ABTS_STATUS(sc) = hdr_status;
980 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
981 if (io_req->abts_done)
982 complete(io_req->abts_done);
983 spin_unlock_irqrestore(io_lock, flags);
984 } else if (id & FNIC_TAG_ABORT) {
985 /* Completion of abort cmd */
986 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
987 /* This is a late completion. Ignore it */
988 spin_unlock_irqrestore(io_lock, flags);
989 return;
990 }
991 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
992 CMD_ABTS_STATUS(sc) = hdr_status;
993
994 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
995 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
996 "abts cmpl recd. id %d status %s\n",
997 (int)(id & FNIC_TAG_MASK),
998 fnic_fcpio_status_to_str(hdr_status));
999
1000 /*
1001 * If scsi_eh thread is blocked waiting for abts to complete,
1002 * signal completion to it. IO will be cleaned in the thread
1003 * else clean it in this context
1004 */
1005 if (io_req->abts_done) {
1006 complete(io_req->abts_done);
1007 spin_unlock_irqrestore(io_lock, flags);
1008 } else {
1009 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1010 "abts cmpl, completing IO\n");
1011 CMD_SP(sc) = NULL;
1012 sc->result = (DID_ERROR << 16);
1013
1014 spin_unlock_irqrestore(io_lock, flags);
1015
1016 fnic_release_ioreq_buf(fnic, io_req, sc);
1017 mempool_free(io_req, fnic->io_req_pool);
1018 if (sc->scsi_done) {
1019 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1020 sc->device->host->host_no, id,
1021 sc,
1022 jiffies_to_msecs(jiffies - start_time),
1023 desc,
1024 (((u64)hdr_status << 40) |
1025 (u64)sc->cmnd[0] << 32 |
1026 (u64)sc->cmnd[2] << 24 |
1027 (u64)sc->cmnd[3] << 16 |
1028 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1029 (((u64)CMD_FLAGS(sc) << 32) |
1030 CMD_STATE(sc)));
1031 sc->scsi_done(sc);
1032 }
1033 }
1034
1035 } else if (id & FNIC_TAG_DEV_RST) {
1036 /* Completion of device reset */
1037 CMD_LR_STATUS(sc) = hdr_status;
1038 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1039 spin_unlock_irqrestore(io_lock, flags);
1040 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1041 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1042 sc->device->host->host_no, id, sc,
1043 jiffies_to_msecs(jiffies - start_time),
1044 desc, 0,
1045 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1046 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1047 "Terminate pending "
1048 "dev reset cmpl recd. id %d status %s\n",
1049 (int)(id & FNIC_TAG_MASK),
1050 fnic_fcpio_status_to_str(hdr_status));
1051 return;
1052 }
1053 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1054 /* Need to wait for terminate completion */
1055 spin_unlock_irqrestore(io_lock, flags);
1056 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1057 sc->device->host->host_no, id, sc,
1058 jiffies_to_msecs(jiffies - start_time),
1059 desc, 0,
1060 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1061 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1062 "dev reset cmpl recd after time out. "
1063 "id %d status %s\n",
1064 (int)(id & FNIC_TAG_MASK),
1065 fnic_fcpio_status_to_str(hdr_status));
1066 return;
1067 }
1068 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1069 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1070 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1071 "dev reset cmpl recd. id %d status %s\n",
1072 (int)(id & FNIC_TAG_MASK),
1073 fnic_fcpio_status_to_str(hdr_status));
1074 if (io_req->dr_done)
1075 complete(io_req->dr_done);
1076 spin_unlock_irqrestore(io_lock, flags);
1077
1078 } else {
1079 shost_printk(KERN_ERR, fnic->lport->host,
1080 "Unexpected itmf io state %s tag %x\n",
1081 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1082 spin_unlock_irqrestore(io_lock, flags);
1083 }
1084
1085 }
1086
1087 /*
1088 * fnic_fcpio_cmpl_handler
1089 * Routine to service the cq for wq_copy
1090 */
1091 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1092 unsigned int cq_index,
1093 struct fcpio_fw_req *desc)
1094 {
1095 struct fnic *fnic = vnic_dev_priv(vdev);
1096
1097 switch (desc->hdr.type) {
1098 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1099 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1100 break;
1101
1102 case FCPIO_ICMND_CMPL: /* fw completed a command */
1103 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1104 break;
1105
1106 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1107 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1108 break;
1109
1110 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1111 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1112 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1113 break;
1114
1115 case FCPIO_RESET_CMPL: /* fw completed reset */
1116 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1117 break;
1118
1119 default:
1120 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1121 "firmware completion type %d\n",
1122 desc->hdr.type);
1123 break;
1124 }
1125
1126 return 0;
1127 }
1128
1129 /*
1130 * fnic_wq_copy_cmpl_handler
1131 * Routine to process wq copy
1132 */
1133 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1134 {
1135 unsigned int wq_work_done = 0;
1136 unsigned int i, cq_index;
1137 unsigned int cur_work_done;
1138
1139 for (i = 0; i < fnic->wq_copy_count; i++) {
1140 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1141 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1142 fnic_fcpio_cmpl_handler,
1143 copy_work_to_do);
1144 wq_work_done += cur_work_done;
1145 }
1146 return wq_work_done;
1147 }
1148
1149 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1150 {
1151 unsigned int i;
1152 struct fnic_io_req *io_req;
1153 unsigned long flags = 0;
1154 struct scsi_cmnd *sc;
1155 spinlock_t *io_lock;
1156 unsigned long start_time = 0;
1157
1158 for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
1159 if (i == exclude_id)
1160 continue;
1161
1162 sc = scsi_host_find_tag(fnic->lport->host, i);
1163 if (!sc)
1164 continue;
1165
1166 io_lock = fnic_io_lock_hash(fnic, sc);
1167 spin_lock_irqsave(io_lock, flags);
1168 io_req = (struct fnic_io_req *)CMD_SP(sc);
1169 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1170 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1171 /*
1172 * We will be here only when FW completes reset
1173 * without sending completions for outstanding ios.
1174 */
1175 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1176 if (io_req && io_req->dr_done)
1177 complete(io_req->dr_done);
1178 else if (io_req && io_req->abts_done)
1179 complete(io_req->abts_done);
1180 spin_unlock_irqrestore(io_lock, flags);
1181 continue;
1182 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1183 spin_unlock_irqrestore(io_lock, flags);
1184 continue;
1185 }
1186 if (!io_req) {
1187 spin_unlock_irqrestore(io_lock, flags);
1188 goto cleanup_scsi_cmd;
1189 }
1190
1191 CMD_SP(sc) = NULL;
1192
1193 spin_unlock_irqrestore(io_lock, flags);
1194
1195 /*
1196 * If there is a scsi_cmnd associated with this io_req, then
1197 * free the corresponding state
1198 */
1199 start_time = io_req->start_time;
1200 fnic_release_ioreq_buf(fnic, io_req, sc);
1201 mempool_free(io_req, fnic->io_req_pool);
1202
1203 cleanup_scsi_cmd:
1204 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1205 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
1206 " DID_TRANSPORT_DISRUPTED\n");
1207
1208 /* Complete the command to SCSI */
1209 if (sc->scsi_done) {
1210 FNIC_TRACE(fnic_cleanup_io,
1211 sc->device->host->host_no, i, sc,
1212 jiffies_to_msecs(jiffies - start_time),
1213 0, ((u64)sc->cmnd[0] << 32 |
1214 (u64)sc->cmnd[2] << 24 |
1215 (u64)sc->cmnd[3] << 16 |
1216 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1217 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1218
1219 sc->scsi_done(sc);
1220 }
1221 }
1222 }
1223
1224 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1225 struct fcpio_host_req *desc)
1226 {
1227 u32 id;
1228 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1229 struct fnic_io_req *io_req;
1230 struct scsi_cmnd *sc;
1231 unsigned long flags;
1232 spinlock_t *io_lock;
1233 unsigned long start_time = 0;
1234
1235 /* get the tag reference */
1236 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1237 id &= FNIC_TAG_MASK;
1238
1239 if (id >= FNIC_MAX_IO_REQ)
1240 return;
1241
1242 sc = scsi_host_find_tag(fnic->lport->host, id);
1243 if (!sc)
1244 return;
1245
1246 io_lock = fnic_io_lock_hash(fnic, sc);
1247 spin_lock_irqsave(io_lock, flags);
1248
1249 /* Get the IO context which this desc refers to */
1250 io_req = (struct fnic_io_req *)CMD_SP(sc);
1251
1252 /* fnic interrupts are turned off by now */
1253
1254 if (!io_req) {
1255 spin_unlock_irqrestore(io_lock, flags);
1256 goto wq_copy_cleanup_scsi_cmd;
1257 }
1258
1259 CMD_SP(sc) = NULL;
1260
1261 spin_unlock_irqrestore(io_lock, flags);
1262
1263 start_time = io_req->start_time;
1264 fnic_release_ioreq_buf(fnic, io_req, sc);
1265 mempool_free(io_req, fnic->io_req_pool);
1266
1267 wq_copy_cleanup_scsi_cmd:
1268 sc->result = DID_NO_CONNECT << 16;
1269 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1270 " DID_NO_CONNECT\n");
1271
1272 if (sc->scsi_done) {
1273 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1274 sc->device->host->host_no, id, sc,
1275 jiffies_to_msecs(jiffies - start_time),
1276 0, ((u64)sc->cmnd[0] << 32 |
1277 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1278 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1279 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1280
1281 sc->scsi_done(sc);
1282 }
1283 }
1284
1285 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1286 u32 task_req, u8 *fc_lun,
1287 struct fnic_io_req *io_req)
1288 {
1289 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1290 struct Scsi_Host *host = fnic->lport->host;
1291 unsigned long flags;
1292
1293 spin_lock_irqsave(host->host_lock, flags);
1294 if (unlikely(fnic_chk_state_flags_locked(fnic,
1295 FNIC_FLAGS_IO_BLOCKED))) {
1296 spin_unlock_irqrestore(host->host_lock, flags);
1297 return 1;
1298 } else
1299 atomic_inc(&fnic->in_flight);
1300 spin_unlock_irqrestore(host->host_lock, flags);
1301
1302 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1303
1304 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1305 free_wq_copy_descs(fnic, wq);
1306
1307 if (!vnic_wq_copy_desc_avail(wq)) {
1308 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1309 atomic_dec(&fnic->in_flight);
1310 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1311 "fnic_queue_abort_io_req: failure: no descriptors\n");
1312 return 1;
1313 }
1314 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1315 0, task_req, tag, fc_lun, io_req->port_id,
1316 fnic->config.ra_tov, fnic->config.ed_tov);
1317
1318 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1319 atomic_dec(&fnic->in_flight);
1320
1321 return 0;
1322 }
1323
1324 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1325 {
1326 int tag;
1327 int abt_tag;
1328 struct fnic_io_req *io_req;
1329 spinlock_t *io_lock;
1330 unsigned long flags;
1331 struct scsi_cmnd *sc;
1332 struct scsi_lun fc_lun;
1333 enum fnic_ioreq_state old_ioreq_state;
1334
1335 FNIC_SCSI_DBG(KERN_DEBUG,
1336 fnic->lport->host,
1337 "fnic_rport_exch_reset called portid 0x%06x\n",
1338 port_id);
1339
1340 if (fnic->in_remove)
1341 return;
1342
1343 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1344 abt_tag = tag;
1345 sc = scsi_host_find_tag(fnic->lport->host, tag);
1346 if (!sc)
1347 continue;
1348
1349 io_lock = fnic_io_lock_hash(fnic, sc);
1350 spin_lock_irqsave(io_lock, flags);
1351
1352 io_req = (struct fnic_io_req *)CMD_SP(sc);
1353
1354 if (!io_req || io_req->port_id != port_id) {
1355 spin_unlock_irqrestore(io_lock, flags);
1356 continue;
1357 }
1358
1359 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1360 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1361 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1362 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1363 sc);
1364 spin_unlock_irqrestore(io_lock, flags);
1365 continue;
1366 }
1367
1368 /*
1369 * Found IO that is still pending with firmware and
1370 * belongs to rport that went away
1371 */
1372 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1373 spin_unlock_irqrestore(io_lock, flags);
1374 continue;
1375 }
1376 if (io_req->abts_done) {
1377 shost_printk(KERN_ERR, fnic->lport->host,
1378 "fnic_rport_exch_reset: io_req->abts_done is set "
1379 "state is %s\n",
1380 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1381 }
1382
1383 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1384 shost_printk(KERN_ERR, fnic->lport->host,
1385 "rport_exch_reset "
1386 "IO not yet issued %p tag 0x%x flags "
1387 "%x state %d\n",
1388 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1389 }
1390 old_ioreq_state = CMD_STATE(sc);
1391 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1392 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1393 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1394 abt_tag = (tag | FNIC_TAG_DEV_RST);
1395 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1396 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1397 sc);
1398 }
1399
1400 BUG_ON(io_req->abts_done);
1401
1402 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1403 "fnic_rport_reset_exch: Issuing abts\n");
1404
1405 spin_unlock_irqrestore(io_lock, flags);
1406
1407 /* Now queue the abort command to firmware */
1408 int_to_scsilun(sc->device->lun, &fc_lun);
1409
1410 if (fnic_queue_abort_io_req(fnic, abt_tag,
1411 FCPIO_ITMF_ABT_TASK_TERM,
1412 fc_lun.scsi_lun, io_req)) {
1413 /*
1414 * Revert the cmd state back to old state, if
1415 * it hasn't changed in between. This cmd will get
1416 * aborted later by scsi_eh, or cleaned up during
1417 * lun reset
1418 */
1419 spin_lock_irqsave(io_lock, flags);
1420 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1421 CMD_STATE(sc) = old_ioreq_state;
1422 spin_unlock_irqrestore(io_lock, flags);
1423 } else {
1424 spin_lock_irqsave(io_lock, flags);
1425 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1426 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1427 else
1428 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1429 spin_unlock_irqrestore(io_lock, flags);
1430 }
1431 }
1432
1433 }
1434
1435 void fnic_terminate_rport_io(struct fc_rport *rport)
1436 {
1437 int tag;
1438 int abt_tag;
1439 struct fnic_io_req *io_req;
1440 spinlock_t *io_lock;
1441 unsigned long flags;
1442 struct scsi_cmnd *sc;
1443 struct scsi_lun fc_lun;
1444 struct fc_rport_libfc_priv *rdata = rport->dd_data;
1445 struct fc_lport *lport = rdata->local_port;
1446 struct fnic *fnic = lport_priv(lport);
1447 struct fc_rport *cmd_rport;
1448 enum fnic_ioreq_state old_ioreq_state;
1449
1450 FNIC_SCSI_DBG(KERN_DEBUG,
1451 fnic->lport->host, "fnic_terminate_rport_io called"
1452 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1453 rport->port_name, rport->node_name, rport,
1454 rport->port_id);
1455
1456 if (fnic->in_remove)
1457 return;
1458
1459 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1460 abt_tag = tag;
1461 sc = scsi_host_find_tag(fnic->lport->host, tag);
1462 if (!sc)
1463 continue;
1464
1465 cmd_rport = starget_to_rport(scsi_target(sc->device));
1466 if (rport != cmd_rport)
1467 continue;
1468
1469 io_lock = fnic_io_lock_hash(fnic, sc);
1470 spin_lock_irqsave(io_lock, flags);
1471
1472 io_req = (struct fnic_io_req *)CMD_SP(sc);
1473
1474 if (!io_req || rport != cmd_rport) {
1475 spin_unlock_irqrestore(io_lock, flags);
1476 continue;
1477 }
1478
1479 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1480 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1481 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1482 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1483 sc);
1484 spin_unlock_irqrestore(io_lock, flags);
1485 continue;
1486 }
1487 /*
1488 * Found IO that is still pending with firmware and
1489 * belongs to rport that went away
1490 */
1491 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1492 spin_unlock_irqrestore(io_lock, flags);
1493 continue;
1494 }
1495 if (io_req->abts_done) {
1496 shost_printk(KERN_ERR, fnic->lport->host,
1497 "fnic_terminate_rport_io: io_req->abts_done is set "
1498 "state is %s\n",
1499 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1500 }
1501 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1502 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1503 "fnic_terminate_rport_io "
1504 "IO not yet issued %p tag 0x%x flags "
1505 "%x state %d\n",
1506 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1507 }
1508 old_ioreq_state = CMD_STATE(sc);
1509 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1510 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1511 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1512 abt_tag = (tag | FNIC_TAG_DEV_RST);
1513 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1514 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1515 }
1516
1517 BUG_ON(io_req->abts_done);
1518
1519 FNIC_SCSI_DBG(KERN_DEBUG,
1520 fnic->lport->host,
1521 "fnic_terminate_rport_io: Issuing abts\n");
1522
1523 spin_unlock_irqrestore(io_lock, flags);
1524
1525 /* Now queue the abort command to firmware */
1526 int_to_scsilun(sc->device->lun, &fc_lun);
1527
1528 if (fnic_queue_abort_io_req(fnic, abt_tag,
1529 FCPIO_ITMF_ABT_TASK_TERM,
1530 fc_lun.scsi_lun, io_req)) {
1531 /*
1532 * Revert the cmd state back to old state, if
1533 * it hasn't changed in between. This cmd will get
1534 * aborted later by scsi_eh, or cleaned up during
1535 * lun reset
1536 */
1537 spin_lock_irqsave(io_lock, flags);
1538 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1539 CMD_STATE(sc) = old_ioreq_state;
1540 spin_unlock_irqrestore(io_lock, flags);
1541 } else {
1542 spin_lock_irqsave(io_lock, flags);
1543 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1544 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1545 else
1546 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1547 spin_unlock_irqrestore(io_lock, flags);
1548 }
1549 }
1550
1551 }
1552
1553 /*
1554 * This function is exported to SCSI for sending abort cmnds.
1555 * A SCSI IO is represented by a io_req in the driver.
1556 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1557 */
1558 int fnic_abort_cmd(struct scsi_cmnd *sc)
1559 {
1560 struct fc_lport *lp;
1561 struct fnic *fnic;
1562 struct fnic_io_req *io_req = NULL;
1563 struct fc_rport *rport;
1564 spinlock_t *io_lock;
1565 unsigned long flags;
1566 unsigned long start_time = 0;
1567 int ret = SUCCESS;
1568 u32 task_req = 0;
1569 struct scsi_lun fc_lun;
1570 int tag;
1571 DECLARE_COMPLETION_ONSTACK(tm_done);
1572
1573 /* Wait for rport to unblock */
1574 fc_block_scsi_eh(sc);
1575
1576 /* Get local-port, check ready and link up */
1577 lp = shost_priv(sc->device->host);
1578
1579 fnic = lport_priv(lp);
1580 rport = starget_to_rport(scsi_target(sc->device));
1581 tag = sc->request->tag;
1582 FNIC_SCSI_DBG(KERN_DEBUG,
1583 fnic->lport->host,
1584 "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %x flags %x\n",
1585 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1586
1587 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1588
1589 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1590 ret = FAILED;
1591 goto fnic_abort_cmd_end;
1592 }
1593
1594 /*
1595 * Avoid a race between SCSI issuing the abort and the device
1596 * completing the command.
1597 *
1598 * If the command is already completed by the fw cmpl code,
1599 * we just return SUCCESS from here. This means that the abort
1600 * succeeded. In the SCSI ML, since the timeout for command has
1601 * happened, the completion wont actually complete the command
1602 * and it will be considered as an aborted command
1603 *
1604 * The CMD_SP will not be cleared except while holding io_req_lock.
1605 */
1606 io_lock = fnic_io_lock_hash(fnic, sc);
1607 spin_lock_irqsave(io_lock, flags);
1608 io_req = (struct fnic_io_req *)CMD_SP(sc);
1609 if (!io_req) {
1610 spin_unlock_irqrestore(io_lock, flags);
1611 goto fnic_abort_cmd_end;
1612 }
1613
1614 io_req->abts_done = &tm_done;
1615
1616 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1617 spin_unlock_irqrestore(io_lock, flags);
1618 goto wait_pending;
1619 }
1620 /*
1621 * Command is still pending, need to abort it
1622 * If the firmware completes the command after this point,
1623 * the completion wont be done till mid-layer, since abort
1624 * has already started.
1625 */
1626 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1627 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1628
1629 spin_unlock_irqrestore(io_lock, flags);
1630
1631 /*
1632 * Check readiness of the remote port. If the path to remote
1633 * port is up, then send abts to the remote port to terminate
1634 * the IO. Else, just locally terminate the IO in the firmware
1635 */
1636 if (fc_remote_port_chkready(rport) == 0)
1637 task_req = FCPIO_ITMF_ABT_TASK;
1638 else
1639 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1640
1641 /* Now queue the abort command to firmware */
1642 int_to_scsilun(sc->device->lun, &fc_lun);
1643
1644 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1645 fc_lun.scsi_lun, io_req)) {
1646 spin_lock_irqsave(io_lock, flags);
1647 io_req = (struct fnic_io_req *)CMD_SP(sc);
1648 if (io_req)
1649 io_req->abts_done = NULL;
1650 spin_unlock_irqrestore(io_lock, flags);
1651 ret = FAILED;
1652 goto fnic_abort_cmd_end;
1653 }
1654 if (task_req == FCPIO_ITMF_ABT_TASK)
1655 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1656 else
1657 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1658
1659 /*
1660 * We queued an abort IO, wait for its completion.
1661 * Once the firmware completes the abort command, it will
1662 * wake up this thread.
1663 */
1664 wait_pending:
1665 wait_for_completion_timeout(&tm_done,
1666 msecs_to_jiffies
1667 (2 * fnic->config.ra_tov +
1668 fnic->config.ed_tov));
1669
1670 /* Check the abort status */
1671 spin_lock_irqsave(io_lock, flags);
1672
1673 io_req = (struct fnic_io_req *)CMD_SP(sc);
1674 if (!io_req) {
1675 spin_unlock_irqrestore(io_lock, flags);
1676 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1677 ret = FAILED;
1678 goto fnic_abort_cmd_end;
1679 }
1680 io_req->abts_done = NULL;
1681
1682 /* fw did not complete abort, timed out */
1683 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1684 spin_unlock_irqrestore(io_lock, flags);
1685 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1686 ret = FAILED;
1687 goto fnic_abort_cmd_end;
1688 }
1689
1690 /*
1691 * firmware completed the abort, check the status,
1692 * free the io_req irrespective of failure or success
1693 */
1694 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1695 ret = FAILED;
1696
1697 CMD_SP(sc) = NULL;
1698
1699 spin_unlock_irqrestore(io_lock, flags);
1700
1701 start_time = io_req->start_time;
1702 fnic_release_ioreq_buf(fnic, io_req, sc);
1703 mempool_free(io_req, fnic->io_req_pool);
1704
1705 fnic_abort_cmd_end:
1706 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1707 sc->request->tag, sc,
1708 jiffies_to_msecs(jiffies - start_time),
1709 0, ((u64)sc->cmnd[0] << 32 |
1710 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1711 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1712 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1713
1714 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1715 "Returning from abort cmd type %x %s\n", task_req,
1716 (ret == SUCCESS) ?
1717 "SUCCESS" : "FAILED");
1718 return ret;
1719 }
1720
1721 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1722 struct scsi_cmnd *sc,
1723 struct fnic_io_req *io_req)
1724 {
1725 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1726 struct Scsi_Host *host = fnic->lport->host;
1727 struct scsi_lun fc_lun;
1728 int ret = 0;
1729 unsigned long intr_flags;
1730
1731 spin_lock_irqsave(host->host_lock, intr_flags);
1732 if (unlikely(fnic_chk_state_flags_locked(fnic,
1733 FNIC_FLAGS_IO_BLOCKED))) {
1734 spin_unlock_irqrestore(host->host_lock, intr_flags);
1735 return FAILED;
1736 } else
1737 atomic_inc(&fnic->in_flight);
1738 spin_unlock_irqrestore(host->host_lock, intr_flags);
1739
1740 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1741
1742 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1743 free_wq_copy_descs(fnic, wq);
1744
1745 if (!vnic_wq_copy_desc_avail(wq)) {
1746 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1747 "queue_dr_io_req failure - no descriptors\n");
1748 ret = -EAGAIN;
1749 goto lr_io_req_end;
1750 }
1751
1752 /* fill in the lun info */
1753 int_to_scsilun(sc->device->lun, &fc_lun);
1754
1755 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1756 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1757 fc_lun.scsi_lun, io_req->port_id,
1758 fnic->config.ra_tov, fnic->config.ed_tov);
1759
1760 lr_io_req_end:
1761 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1762 atomic_dec(&fnic->in_flight);
1763
1764 return ret;
1765 }
1766
1767 /*
1768 * Clean up any pending aborts on the lun
1769 * For each outstanding IO on this lun, whose abort is not completed by fw,
1770 * issue a local abort. Wait for abort to complete. Return 0 if all commands
1771 * successfully aborted, 1 otherwise
1772 */
1773 static int fnic_clean_pending_aborts(struct fnic *fnic,
1774 struct scsi_cmnd *lr_sc)
1775 {
1776 int tag, abt_tag;
1777 struct fnic_io_req *io_req;
1778 spinlock_t *io_lock;
1779 unsigned long flags;
1780 int ret = 0;
1781 struct scsi_cmnd *sc;
1782 struct scsi_lun fc_lun;
1783 struct scsi_device *lun_dev = lr_sc->device;
1784 DECLARE_COMPLETION_ONSTACK(tm_done);
1785 enum fnic_ioreq_state old_ioreq_state;
1786
1787 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1788 sc = scsi_host_find_tag(fnic->lport->host, tag);
1789 /*
1790 * ignore this lun reset cmd or cmds that do not belong to
1791 * this lun
1792 */
1793 if (!sc || sc == lr_sc || sc->device != lun_dev)
1794 continue;
1795
1796 io_lock = fnic_io_lock_hash(fnic, sc);
1797 spin_lock_irqsave(io_lock, flags);
1798
1799 io_req = (struct fnic_io_req *)CMD_SP(sc);
1800
1801 if (!io_req || sc->device != lun_dev) {
1802 spin_unlock_irqrestore(io_lock, flags);
1803 continue;
1804 }
1805
1806 /*
1807 * Found IO that is still pending with firmware and
1808 * belongs to the LUN that we are resetting
1809 */
1810 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1811 "Found IO in %s on lun\n",
1812 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1813
1814 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1815 spin_unlock_irqrestore(io_lock, flags);
1816 continue;
1817 }
1818 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1819 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1820 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1821 "%s dev rst not pending sc 0x%p\n", __func__,
1822 sc);
1823 spin_unlock_irqrestore(io_lock, flags);
1824 continue;
1825 }
1826 old_ioreq_state = CMD_STATE(sc);
1827 /*
1828 * Any pending IO issued prior to reset is expected to be
1829 * in abts pending state, if not we need to set
1830 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
1831 * When IO is completed, the IO will be handed over and
1832 * handled in this function.
1833 */
1834 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1835
1836 if (io_req->abts_done)
1837 shost_printk(KERN_ERR, fnic->lport->host,
1838 "%s: io_req->abts_done is set state is %s\n",
1839 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
1840
1841 BUG_ON(io_req->abts_done);
1842
1843 abt_tag = tag;
1844 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1845 abt_tag |= FNIC_TAG_DEV_RST;
1846 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1847 "%s: dev rst sc 0x%p\n", __func__, sc);
1848 }
1849
1850 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1851 io_req->abts_done = &tm_done;
1852 spin_unlock_irqrestore(io_lock, flags);
1853
1854 /* Now queue the abort command to firmware */
1855 int_to_scsilun(sc->device->lun, &fc_lun);
1856
1857 if (fnic_queue_abort_io_req(fnic, abt_tag,
1858 FCPIO_ITMF_ABT_TASK_TERM,
1859 fc_lun.scsi_lun, io_req)) {
1860 spin_lock_irqsave(io_lock, flags);
1861 io_req = (struct fnic_io_req *)CMD_SP(sc);
1862 if (io_req)
1863 io_req->abts_done = NULL;
1864 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1865 CMD_STATE(sc) = old_ioreq_state;
1866 spin_unlock_irqrestore(io_lock, flags);
1867 ret = 1;
1868 goto clean_pending_aborts_end;
1869 } else {
1870 spin_lock_irqsave(io_lock, flags);
1871 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1872 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1873 spin_unlock_irqrestore(io_lock, flags);
1874 }
1875 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1876
1877 wait_for_completion_timeout(&tm_done,
1878 msecs_to_jiffies
1879 (fnic->config.ed_tov));
1880
1881 /* Recheck cmd state to check if it is now aborted */
1882 spin_lock_irqsave(io_lock, flags);
1883 io_req = (struct fnic_io_req *)CMD_SP(sc);
1884 if (!io_req) {
1885 spin_unlock_irqrestore(io_lock, flags);
1886 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1887 continue;
1888 }
1889
1890 io_req->abts_done = NULL;
1891
1892 /* if abort is still pending with fw, fail */
1893 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1894 spin_unlock_irqrestore(io_lock, flags);
1895 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1896 ret = 1;
1897 goto clean_pending_aborts_end;
1898 }
1899 CMD_SP(sc) = NULL;
1900 spin_unlock_irqrestore(io_lock, flags);
1901
1902 fnic_release_ioreq_buf(fnic, io_req, sc);
1903 mempool_free(io_req, fnic->io_req_pool);
1904 }
1905
1906 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
1907
1908 /* walk again to check, if IOs are still pending in fw */
1909 if (fnic_is_abts_pending(fnic, lr_sc))
1910 ret = FAILED;
1911
1912 clean_pending_aborts_end:
1913 return ret;
1914 }
1915
1916 /**
1917 * fnic_scsi_host_start_tag
1918 * Allocates tagid from host's tag list
1919 **/
1920 static inline int
1921 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
1922 {
1923 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
1924 int tag, ret = SCSI_NO_TAG;
1925
1926 BUG_ON(!bqt);
1927 if (!bqt) {
1928 pr_err("Tags are not supported\n");
1929 goto end;
1930 }
1931
1932 do {
1933 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
1934 if (tag >= bqt->max_depth) {
1935 pr_err("Tag allocation failure\n");
1936 goto end;
1937 }
1938 } while (test_and_set_bit(tag, bqt->tag_map));
1939
1940 bqt->tag_index[tag] = sc->request;
1941 sc->request->tag = tag;
1942 sc->tag = tag;
1943 if (!sc->request->special)
1944 sc->request->special = sc;
1945
1946 ret = tag;
1947
1948 end:
1949 return ret;
1950 }
1951
1952 /**
1953 * fnic_scsi_host_end_tag
1954 * frees tag allocated by fnic_scsi_host_start_tag.
1955 **/
1956 static inline void
1957 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
1958 {
1959 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
1960 int tag = sc->request->tag;
1961
1962 if (tag == SCSI_NO_TAG)
1963 return;
1964
1965 BUG_ON(!bqt || !bqt->tag_index[tag]);
1966 if (!bqt)
1967 return;
1968
1969 bqt->tag_index[tag] = NULL;
1970 clear_bit(tag, bqt->tag_map);
1971
1972 return;
1973 }
1974
1975 /*
1976 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1977 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1978 * on the LUN.
1979 */
1980 int fnic_device_reset(struct scsi_cmnd *sc)
1981 {
1982 struct fc_lport *lp;
1983 struct fnic *fnic;
1984 struct fnic_io_req *io_req = NULL;
1985 struct fc_rport *rport;
1986 int status;
1987 int ret = FAILED;
1988 spinlock_t *io_lock;
1989 unsigned long flags;
1990 unsigned long start_time = 0;
1991 struct scsi_lun fc_lun;
1992 int tag = 0;
1993 DECLARE_COMPLETION_ONSTACK(tm_done);
1994 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
1995
1996 /* Wait for rport to unblock */
1997 fc_block_scsi_eh(sc);
1998
1999 /* Get local-port, check ready and link up */
2000 lp = shost_priv(sc->device->host);
2001
2002 fnic = lport_priv(lp);
2003
2004 rport = starget_to_rport(scsi_target(sc->device));
2005 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2006 "Device reset called FCID 0x%x, LUN 0x%x sc 0x%p\n",
2007 rport->port_id, sc->device->lun, sc);
2008
2009 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2010 goto fnic_device_reset_end;
2011
2012 /* Check if remote port up */
2013 if (fc_remote_port_chkready(rport))
2014 goto fnic_device_reset_end;
2015
2016 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2017 /* Allocate tag if not present */
2018
2019 tag = sc->request->tag;
2020 if (unlikely(tag < 0)) {
2021 tag = fnic_scsi_host_start_tag(fnic, sc);
2022 if (unlikely(tag == SCSI_NO_TAG))
2023 goto fnic_device_reset_end;
2024 tag_gen_flag = 1;
2025 }
2026 io_lock = fnic_io_lock_hash(fnic, sc);
2027 spin_lock_irqsave(io_lock, flags);
2028 io_req = (struct fnic_io_req *)CMD_SP(sc);
2029
2030 /*
2031 * If there is a io_req attached to this command, then use it,
2032 * else allocate a new one.
2033 */
2034 if (!io_req) {
2035 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2036 if (!io_req) {
2037 spin_unlock_irqrestore(io_lock, flags);
2038 goto fnic_device_reset_end;
2039 }
2040 memset(io_req, 0, sizeof(*io_req));
2041 io_req->port_id = rport->port_id;
2042 CMD_SP(sc) = (char *)io_req;
2043 }
2044 io_req->dr_done = &tm_done;
2045 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2046 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2047 spin_unlock_irqrestore(io_lock, flags);
2048
2049 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2050
2051 /*
2052 * issue the device reset, if enqueue failed, clean up the ioreq
2053 * and break assoc with scsi cmd
2054 */
2055 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2056 spin_lock_irqsave(io_lock, flags);
2057 io_req = (struct fnic_io_req *)CMD_SP(sc);
2058 if (io_req)
2059 io_req->dr_done = NULL;
2060 goto fnic_device_reset_clean;
2061 }
2062 spin_lock_irqsave(io_lock, flags);
2063 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2064 spin_unlock_irqrestore(io_lock, flags);
2065
2066 /*
2067 * Wait on the local completion for LUN reset. The io_req may be
2068 * freed while we wait since we hold no lock.
2069 */
2070 wait_for_completion_timeout(&tm_done,
2071 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2072
2073 spin_lock_irqsave(io_lock, flags);
2074 io_req = (struct fnic_io_req *)CMD_SP(sc);
2075 if (!io_req) {
2076 spin_unlock_irqrestore(io_lock, flags);
2077 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2078 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2079 goto fnic_device_reset_end;
2080 }
2081 io_req->dr_done = NULL;
2082
2083 status = CMD_LR_STATUS(sc);
2084
2085 /*
2086 * If lun reset not completed, bail out with failed. io_req
2087 * gets cleaned up during higher levels of EH
2088 */
2089 if (status == FCPIO_INVALID_CODE) {
2090 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2091 "Device reset timed out\n");
2092 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2093 spin_unlock_irqrestore(io_lock, flags);
2094 int_to_scsilun(sc->device->lun, &fc_lun);
2095 /*
2096 * Issue abort and terminate on the device reset request.
2097 * If q'ing of the abort fails, retry issue it after a delay.
2098 */
2099 while (1) {
2100 spin_lock_irqsave(io_lock, flags);
2101 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2102 spin_unlock_irqrestore(io_lock, flags);
2103 break;
2104 }
2105 spin_unlock_irqrestore(io_lock, flags);
2106 if (fnic_queue_abort_io_req(fnic,
2107 tag | FNIC_TAG_DEV_RST,
2108 FCPIO_ITMF_ABT_TASK_TERM,
2109 fc_lun.scsi_lun, io_req)) {
2110 wait_for_completion_timeout(&tm_done,
2111 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2112 } else {
2113 spin_lock_irqsave(io_lock, flags);
2114 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2115 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2116 io_req->abts_done = &tm_done;
2117 spin_unlock_irqrestore(io_lock, flags);
2118 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2119 "Abort and terminate issued on Device reset "
2120 "tag 0x%x sc 0x%p\n", tag, sc);
2121 break;
2122 }
2123 }
2124 while (1) {
2125 spin_lock_irqsave(io_lock, flags);
2126 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2127 spin_unlock_irqrestore(io_lock, flags);
2128 wait_for_completion_timeout(&tm_done,
2129 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2130 break;
2131 } else {
2132 io_req = (struct fnic_io_req *)CMD_SP(sc);
2133 io_req->abts_done = NULL;
2134 goto fnic_device_reset_clean;
2135 }
2136 }
2137 } else {
2138 spin_unlock_irqrestore(io_lock, flags);
2139 }
2140
2141 /* Completed, but not successful, clean up the io_req, return fail */
2142 if (status != FCPIO_SUCCESS) {
2143 spin_lock_irqsave(io_lock, flags);
2144 FNIC_SCSI_DBG(KERN_DEBUG,
2145 fnic->lport->host,
2146 "Device reset completed - failed\n");
2147 io_req = (struct fnic_io_req *)CMD_SP(sc);
2148 goto fnic_device_reset_clean;
2149 }
2150
2151 /*
2152 * Clean up any aborts on this lun that have still not
2153 * completed. If any of these fail, then LUN reset fails.
2154 * clean_pending_aborts cleans all cmds on this lun except
2155 * the lun reset cmd. If all cmds get cleaned, the lun reset
2156 * succeeds
2157 */
2158 if (fnic_clean_pending_aborts(fnic, sc)) {
2159 spin_lock_irqsave(io_lock, flags);
2160 io_req = (struct fnic_io_req *)CMD_SP(sc);
2161 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2162 "Device reset failed"
2163 " since could not abort all IOs\n");
2164 goto fnic_device_reset_clean;
2165 }
2166
2167 /* Clean lun reset command */
2168 spin_lock_irqsave(io_lock, flags);
2169 io_req = (struct fnic_io_req *)CMD_SP(sc);
2170 if (io_req)
2171 /* Completed, and successful */
2172 ret = SUCCESS;
2173
2174 fnic_device_reset_clean:
2175 if (io_req)
2176 CMD_SP(sc) = NULL;
2177
2178 spin_unlock_irqrestore(io_lock, flags);
2179
2180 if (io_req) {
2181 start_time = io_req->start_time;
2182 fnic_release_ioreq_buf(fnic, io_req, sc);
2183 mempool_free(io_req, fnic->io_req_pool);
2184 }
2185
2186 fnic_device_reset_end:
2187 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2188 sc->request->tag, sc,
2189 jiffies_to_msecs(jiffies - start_time),
2190 0, ((u64)sc->cmnd[0] << 32 |
2191 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2192 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2193 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2194
2195 /* free tag if it is allocated */
2196 if (unlikely(tag_gen_flag))
2197 fnic_scsi_host_end_tag(fnic, sc);
2198
2199 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2200 "Returning from device reset %s\n",
2201 (ret == SUCCESS) ?
2202 "SUCCESS" : "FAILED");
2203 return ret;
2204 }
2205
2206 /* Clean up all IOs, clean up libFC local port */
2207 int fnic_reset(struct Scsi_Host *shost)
2208 {
2209 struct fc_lport *lp;
2210 struct fnic *fnic;
2211 int ret = SUCCESS;
2212
2213 lp = shost_priv(shost);
2214 fnic = lport_priv(lp);
2215
2216 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2217 "fnic_reset called\n");
2218
2219 /*
2220 * Reset local port, this will clean up libFC exchanges,
2221 * reset remote port sessions, and if link is up, begin flogi
2222 */
2223 if (lp->tt.lport_reset(lp))
2224 ret = FAILED;
2225
2226 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2227 "Returning from fnic reset %s\n",
2228 (ret == SUCCESS) ?
2229 "SUCCESS" : "FAILED");
2230
2231 return ret;
2232 }
2233
2234 /*
2235 * SCSI Error handling calls driver's eh_host_reset if all prior
2236 * error handling levels return FAILED. If host reset completes
2237 * successfully, and if link is up, then Fabric login begins.
2238 *
2239 * Host Reset is the highest level of error recovery. If this fails, then
2240 * host is offlined by SCSI.
2241 *
2242 */
2243 int fnic_host_reset(struct scsi_cmnd *sc)
2244 {
2245 int ret;
2246 unsigned long wait_host_tmo;
2247 struct Scsi_Host *shost = sc->device->host;
2248 struct fc_lport *lp = shost_priv(shost);
2249
2250 /*
2251 * If fnic_reset is successful, wait for fabric login to complete
2252 * scsi-ml tries to send a TUR to every device if host reset is
2253 * successful, so before returning to scsi, fabric should be up
2254 */
2255 ret = fnic_reset(shost);
2256 if (ret == SUCCESS) {
2257 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2258 ret = FAILED;
2259 while (time_before(jiffies, wait_host_tmo)) {
2260 if ((lp->state == LPORT_ST_READY) &&
2261 (lp->link_up)) {
2262 ret = SUCCESS;
2263 break;
2264 }
2265 ssleep(1);
2266 }
2267 }
2268
2269 return ret;
2270 }
2271
2272 /*
2273 * This fxn is called from libFC when host is removed
2274 */
2275 void fnic_scsi_abort_io(struct fc_lport *lp)
2276 {
2277 int err = 0;
2278 unsigned long flags;
2279 enum fnic_state old_state;
2280 struct fnic *fnic = lport_priv(lp);
2281 DECLARE_COMPLETION_ONSTACK(remove_wait);
2282
2283 /* Issue firmware reset for fnic, wait for reset to complete */
2284 retry_fw_reset:
2285 spin_lock_irqsave(&fnic->fnic_lock, flags);
2286 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2287 /* fw reset is in progress, poll for its completion */
2288 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2289 schedule_timeout(msecs_to_jiffies(100));
2290 goto retry_fw_reset;
2291 }
2292
2293 fnic->remove_wait = &remove_wait;
2294 old_state = fnic->state;
2295 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2296 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2297 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2298
2299 err = fnic_fw_reset_handler(fnic);
2300 if (err) {
2301 spin_lock_irqsave(&fnic->fnic_lock, flags);
2302 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2303 fnic->state = old_state;
2304 fnic->remove_wait = NULL;
2305 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2306 return;
2307 }
2308
2309 /* Wait for firmware reset to complete */
2310 wait_for_completion_timeout(&remove_wait,
2311 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2312
2313 spin_lock_irqsave(&fnic->fnic_lock, flags);
2314 fnic->remove_wait = NULL;
2315 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2316 "fnic_scsi_abort_io %s\n",
2317 (fnic->state == FNIC_IN_ETH_MODE) ?
2318 "SUCCESS" : "FAILED");
2319 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2320
2321 }
2322
2323 /*
2324 * This fxn called from libFC to clean up driver IO state on link down
2325 */
2326 void fnic_scsi_cleanup(struct fc_lport *lp)
2327 {
2328 unsigned long flags;
2329 enum fnic_state old_state;
2330 struct fnic *fnic = lport_priv(lp);
2331
2332 /* issue fw reset */
2333 retry_fw_reset:
2334 spin_lock_irqsave(&fnic->fnic_lock, flags);
2335 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2336 /* fw reset is in progress, poll for its completion */
2337 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2338 schedule_timeout(msecs_to_jiffies(100));
2339 goto retry_fw_reset;
2340 }
2341 old_state = fnic->state;
2342 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2343 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2344 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2345
2346 if (fnic_fw_reset_handler(fnic)) {
2347 spin_lock_irqsave(&fnic->fnic_lock, flags);
2348 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2349 fnic->state = old_state;
2350 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2351 }
2352
2353 }
2354
2355 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2356 {
2357 }
2358
2359 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2360 {
2361 struct fnic *fnic = lport_priv(lp);
2362
2363 /* Non-zero sid, nothing to do */
2364 if (sid)
2365 goto call_fc_exch_mgr_reset;
2366
2367 if (did) {
2368 fnic_rport_exch_reset(fnic, did);
2369 goto call_fc_exch_mgr_reset;
2370 }
2371
2372 /*
2373 * sid = 0, did = 0
2374 * link down or device being removed
2375 */
2376 if (!fnic->in_remove)
2377 fnic_scsi_cleanup(lp);
2378 else
2379 fnic_scsi_abort_io(lp);
2380
2381 /* call libFC exch mgr reset to reset its exchanges */
2382 call_fc_exch_mgr_reset:
2383 fc_exch_mgr_reset(lp, sid, did);
2384
2385 }
2386
2387 /*
2388 * fnic_is_abts_pending() is a helper function that
2389 * walks through tag map to check if there is any IOs pending,if there is one,
2390 * then it returns 1 (true), otherwise 0 (false)
2391 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2392 * otherwise, it checks for all IOs.
2393 */
2394 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2395 {
2396 int tag;
2397 struct fnic_io_req *io_req;
2398 spinlock_t *io_lock;
2399 unsigned long flags;
2400 int ret = 0;
2401 struct scsi_cmnd *sc;
2402 struct scsi_device *lun_dev = NULL;
2403
2404 if (lr_sc)
2405 lun_dev = lr_sc->device;
2406
2407 /* walk again to check, if IOs are still pending in fw */
2408 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
2409 sc = scsi_host_find_tag(fnic->lport->host, tag);
2410 /*
2411 * ignore this lun reset cmd or cmds that do not belong to
2412 * this lun
2413 */
2414 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2415 continue;
2416
2417 io_lock = fnic_io_lock_hash(fnic, sc);
2418 spin_lock_irqsave(io_lock, flags);
2419
2420 io_req = (struct fnic_io_req *)CMD_SP(sc);
2421
2422 if (!io_req || sc->device != lun_dev) {
2423 spin_unlock_irqrestore(io_lock, flags);
2424 continue;
2425 }
2426
2427 /*
2428 * Found IO that is still pending with firmware and
2429 * belongs to the LUN that we are resetting
2430 */
2431 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2432 "Found IO in %s on lun\n",
2433 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2434
2435 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2436 spin_unlock_irqrestore(io_lock, flags);
2437 ret = 1;
2438 continue;
2439 }
2440 }
2441
2442 return ret;
2443 }
Linux with added FPC-III support