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5df6d737 AJ |
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> | |
5a0e3ad6 | 29 | #include <linux/gfp.h> |
5df6d737 AJ |
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[] = { | |
14eb5d90 | 50 | [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", |
5df6d737 AJ |
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 | ||
1259c5dc SB |
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 | ||
5df6d737 AJ |
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 | ||
03298552 HP |
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 | ||
5df6d737 AJ |
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 | ||
03298552 HP |
212 | /* indicate fwreset to io path */ |
213 | fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); | |
214 | ||
78112e55 JE |
215 | skb_queue_purge(&fnic->frame_queue); |
216 | skb_queue_purge(&fnic->tx_queue); | |
217 | ||
03298552 HP |
218 | /* wait for io cmpl */ |
219 | while (atomic_read(&fnic->in_flight)) | |
220 | schedule_timeout(msecs_to_jiffies(1)); | |
221 | ||
5df6d737 AJ |
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; | |
67125b02 | 229 | else { |
5df6d737 | 230 | fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); |
67125b02 HP |
231 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
232 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
233 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
234 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
235 | atomic64_read( | |
236 | &fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
237 | } | |
5df6d737 AJ |
238 | |
239 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
240 | ||
67125b02 HP |
241 | if (!ret) { |
242 | atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); | |
5df6d737 AJ |
243 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
244 | "Issued fw reset\n"); | |
67125b02 | 245 | } else { |
03298552 | 246 | fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); |
5df6d737 AJ |
247 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
248 | "Failed to issue fw reset\n"); | |
03298552 HP |
249 | } |
250 | ||
5df6d737 AJ |
251 | return ret; |
252 | } | |
253 | ||
254 | ||
255 | /* | |
256 | * fnic_flogi_reg_handler | |
257 | * Routine to send flogi register msg to fw | |
258 | */ | |
78112e55 | 259 | int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) |
5df6d737 AJ |
260 | { |
261 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
78112e55 JE |
262 | enum fcpio_flogi_reg_format_type format; |
263 | struct fc_lport *lp = fnic->lport; | |
5df6d737 AJ |
264 | u8 gw_mac[ETH_ALEN]; |
265 | int ret = 0; | |
266 | unsigned long flags; | |
267 | ||
268 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); | |
269 | ||
270 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
271 | free_wq_copy_descs(fnic, wq); | |
272 | ||
273 | if (!vnic_wq_copy_desc_avail(wq)) { | |
274 | ret = -EAGAIN; | |
275 | goto flogi_reg_ioreq_end; | |
276 | } | |
277 | ||
78112e55 | 278 | if (fnic->ctlr.map_dest) { |
5df6d737 | 279 | memset(gw_mac, 0xff, ETH_ALEN); |
78112e55 JE |
280 | format = FCPIO_FLOGI_REG_DEF_DEST; |
281 | } else { | |
282 | memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); | |
283 | format = FCPIO_FLOGI_REG_GW_DEST; | |
284 | } | |
5df6d737 | 285 | |
78112e55 JE |
286 | if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { |
287 | fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, | |
288 | fc_id, gw_mac, | |
289 | fnic->data_src_addr, | |
290 | lp->r_a_tov, lp->e_d_tov); | |
291 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
292 | "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", | |
293 | fc_id, fnic->data_src_addr, gw_mac); | |
294 | } else { | |
295 | fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, | |
296 | format, fc_id, gw_mac); | |
297 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
298 | "FLOGI reg issued fcid %x map %d dest %pM\n", | |
299 | fc_id, fnic->ctlr.map_dest, gw_mac); | |
300 | } | |
5df6d737 | 301 | |
67125b02 HP |
302 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
303 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
304 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
305 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
306 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
307 | ||
5df6d737 AJ |
308 | flogi_reg_ioreq_end: |
309 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
5df6d737 AJ |
310 | return ret; |
311 | } | |
312 | ||
313 | /* | |
314 | * fnic_queue_wq_copy_desc | |
315 | * Routine to enqueue a wq copy desc | |
316 | */ | |
317 | static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, | |
318 | struct vnic_wq_copy *wq, | |
319 | struct fnic_io_req *io_req, | |
320 | struct scsi_cmnd *sc, | |
87a2d34b | 321 | int sg_count) |
5df6d737 AJ |
322 | { |
323 | struct scatterlist *sg; | |
324 | struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); | |
325 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
326 | struct host_sg_desc *desc; | |
67125b02 | 327 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; |
5df6d737 AJ |
328 | u8 pri_tag = 0; |
329 | unsigned int i; | |
330 | unsigned long intr_flags; | |
331 | int flags; | |
332 | u8 exch_flags; | |
333 | struct scsi_lun fc_lun; | |
334 | char msg[2]; | |
335 | ||
336 | if (sg_count) { | |
5df6d737 AJ |
337 | /* For each SGE, create a device desc entry */ |
338 | desc = io_req->sgl_list; | |
339 | for_each_sg(scsi_sglist(sc), sg, sg_count, i) { | |
340 | desc->addr = cpu_to_le64(sg_dma_address(sg)); | |
341 | desc->len = cpu_to_le32(sg_dma_len(sg)); | |
342 | desc->_resvd = 0; | |
343 | desc++; | |
344 | } | |
345 | ||
346 | io_req->sgl_list_pa = pci_map_single | |
347 | (fnic->pdev, | |
348 | io_req->sgl_list, | |
349 | sizeof(io_req->sgl_list[0]) * sg_count, | |
350 | PCI_DMA_TODEVICE); | |
351 | } | |
352 | ||
353 | io_req->sense_buf_pa = pci_map_single(fnic->pdev, | |
354 | sc->sense_buffer, | |
355 | SCSI_SENSE_BUFFERSIZE, | |
356 | PCI_DMA_FROMDEVICE); | |
357 | ||
358 | int_to_scsilun(sc->device->lun, &fc_lun); | |
359 | ||
360 | pri_tag = FCPIO_ICMND_PTA_SIMPLE; | |
361 | msg[0] = MSG_SIMPLE_TAG; | |
362 | scsi_populate_tag_msg(sc, msg); | |
363 | if (msg[0] == MSG_ORDERED_TAG) | |
364 | pri_tag = FCPIO_ICMND_PTA_ORDERED; | |
365 | ||
366 | /* Enqueue the descriptor in the Copy WQ */ | |
367 | spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); | |
368 | ||
369 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
370 | free_wq_copy_descs(fnic, wq); | |
371 | ||
372 | if (unlikely(!vnic_wq_copy_desc_avail(wq))) { | |
373 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
14eb5d90 HP |
374 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, |
375 | "fnic_queue_wq_copy_desc failure - no descriptors\n"); | |
67125b02 | 376 | atomic64_inc(&misc_stats->io_cpwq_alloc_failures); |
5df6d737 AJ |
377 | return SCSI_MLQUEUE_HOST_BUSY; |
378 | } | |
379 | ||
380 | flags = 0; | |
381 | if (sc->sc_data_direction == DMA_FROM_DEVICE) | |
382 | flags = FCPIO_ICMND_RDDATA; | |
383 | else if (sc->sc_data_direction == DMA_TO_DEVICE) | |
384 | flags = FCPIO_ICMND_WRDATA; | |
385 | ||
386 | exch_flags = 0; | |
387 | if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && | |
388 | (rp->flags & FC_RP_FLAGS_RETRY)) | |
389 | exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; | |
390 | ||
391 | fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, | |
392 | 0, exch_flags, io_req->sgl_cnt, | |
393 | SCSI_SENSE_BUFFERSIZE, | |
394 | io_req->sgl_list_pa, | |
395 | io_req->sense_buf_pa, | |
396 | 0, /* scsi cmd ref, always 0 */ | |
397 | pri_tag, /* scsi pri and tag */ | |
398 | flags, /* command flags */ | |
4b53662b AJ |
399 | sc->cmnd, sc->cmd_len, |
400 | scsi_bufflen(sc), | |
5df6d737 AJ |
401 | fc_lun.scsi_lun, io_req->port_id, |
402 | rport->maxframe_size, rp->r_a_tov, | |
403 | rp->e_d_tov); | |
404 | ||
67125b02 HP |
405 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
406 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
407 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
408 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
409 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
410 | ||
5df6d737 AJ |
411 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); |
412 | return 0; | |
413 | } | |
414 | ||
415 | /* | |
416 | * fnic_queuecommand | |
417 | * Routine to send a scsi cdb | |
418 | * Called with host_lock held and interrupts disabled. | |
419 | */ | |
f281233d | 420 | static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) |
5df6d737 | 421 | { |
03298552 | 422 | struct fc_lport *lp = shost_priv(sc->device->host); |
5df6d737 | 423 | struct fc_rport *rport; |
4d7007b4 | 424 | struct fnic_io_req *io_req = NULL; |
03298552 | 425 | struct fnic *fnic = lport_priv(lp); |
67125b02 | 426 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 AJ |
427 | struct vnic_wq_copy *wq; |
428 | int ret; | |
4d7007b4 HP |
429 | u64 cmd_trace; |
430 | int sg_count = 0; | |
5df6d737 AJ |
431 | unsigned long flags; |
432 | unsigned long ptr; | |
433 | ||
03298552 HP |
434 | if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) |
435 | return SCSI_MLQUEUE_HOST_BUSY; | |
436 | ||
5df6d737 AJ |
437 | rport = starget_to_rport(scsi_target(sc->device)); |
438 | ret = fc_remote_port_chkready(rport); | |
439 | if (ret) { | |
67125b02 | 440 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); |
5df6d737 AJ |
441 | sc->result = ret; |
442 | done(sc); | |
443 | return 0; | |
444 | } | |
445 | ||
5df6d737 AJ |
446 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) |
447 | return SCSI_MLQUEUE_HOST_BUSY; | |
448 | ||
03298552 HP |
449 | atomic_inc(&fnic->in_flight); |
450 | ||
5df6d737 AJ |
451 | /* |
452 | * Release host lock, use driver resource specific locks from here. | |
453 | * Don't re-enable interrupts in case they were disabled prior to the | |
454 | * caller disabling them. | |
455 | */ | |
456 | spin_unlock(lp->host->host_lock); | |
14eb5d90 HP |
457 | CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; |
458 | CMD_FLAGS(sc) = FNIC_NO_FLAGS; | |
5df6d737 AJ |
459 | |
460 | /* Get a new io_req for this SCSI IO */ | |
5df6d737 AJ |
461 | io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); |
462 | if (!io_req) { | |
67125b02 | 463 | atomic64_inc(&fnic_stats->io_stats.alloc_failures); |
5df6d737 AJ |
464 | ret = SCSI_MLQUEUE_HOST_BUSY; |
465 | goto out; | |
466 | } | |
467 | memset(io_req, 0, sizeof(*io_req)); | |
468 | ||
469 | /* Map the data buffer */ | |
470 | sg_count = scsi_dma_map(sc); | |
471 | if (sg_count < 0) { | |
4d7007b4 HP |
472 | FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, |
473 | sc->request->tag, sc, 0, sc->cmnd[0], | |
474 | sg_count, CMD_STATE(sc)); | |
5df6d737 AJ |
475 | mempool_free(io_req, fnic->io_req_pool); |
476 | goto out; | |
477 | } | |
478 | ||
479 | /* Determine the type of scatter/gather list we need */ | |
480 | io_req->sgl_cnt = sg_count; | |
481 | io_req->sgl_type = FNIC_SGL_CACHE_DFLT; | |
482 | if (sg_count > FNIC_DFLT_SG_DESC_CNT) | |
483 | io_req->sgl_type = FNIC_SGL_CACHE_MAX; | |
484 | ||
485 | if (sg_count) { | |
486 | io_req->sgl_list = | |
487 | mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], | |
0c79c742 | 488 | GFP_ATOMIC); |
5df6d737 | 489 | if (!io_req->sgl_list) { |
67125b02 | 490 | atomic64_inc(&fnic_stats->io_stats.alloc_failures); |
5df6d737 AJ |
491 | ret = SCSI_MLQUEUE_HOST_BUSY; |
492 | scsi_dma_unmap(sc); | |
493 | mempool_free(io_req, fnic->io_req_pool); | |
494 | goto out; | |
495 | } | |
496 | ||
497 | /* Cache sgl list allocated address before alignment */ | |
498 | io_req->sgl_list_alloc = io_req->sgl_list; | |
499 | ptr = (unsigned long) io_req->sgl_list; | |
500 | if (ptr % FNIC_SG_DESC_ALIGN) { | |
501 | io_req->sgl_list = (struct host_sg_desc *) | |
502 | (((unsigned long) ptr | |
503 | + FNIC_SG_DESC_ALIGN - 1) | |
504 | & ~(FNIC_SG_DESC_ALIGN - 1)); | |
505 | } | |
506 | } | |
507 | ||
508 | /* initialize rest of io_req */ | |
509 | io_req->port_id = rport->port_id; | |
14eb5d90 | 510 | io_req->start_time = jiffies; |
5df6d737 AJ |
511 | CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; |
512 | CMD_SP(sc) = (char *)io_req; | |
14eb5d90 | 513 | CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; |
5df6d737 AJ |
514 | sc->scsi_done = done; |
515 | ||
516 | /* create copy wq desc and enqueue it */ | |
517 | wq = &fnic->wq_copy[0]; | |
518 | ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); | |
519 | if (ret) { | |
520 | /* | |
521 | * In case another thread cancelled the request, | |
522 | * refetch the pointer under the lock. | |
523 | */ | |
524 | spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc); | |
4d7007b4 HP |
525 | FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, |
526 | sc->request->tag, sc, 0, 0, 0, | |
527 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
5df6d737 AJ |
528 | spin_lock_irqsave(io_lock, flags); |
529 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
530 | CMD_SP(sc) = NULL; | |
531 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
532 | spin_unlock_irqrestore(io_lock, flags); | |
533 | if (io_req) { | |
534 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
535 | mempool_free(io_req, fnic->io_req_pool); | |
536 | } | |
14eb5d90 | 537 | } else { |
67125b02 HP |
538 | atomic64_inc(&fnic_stats->io_stats.active_ios); |
539 | atomic64_inc(&fnic_stats->io_stats.num_ios); | |
540 | if (atomic64_read(&fnic_stats->io_stats.active_ios) > | |
541 | atomic64_read(&fnic_stats->io_stats.max_active_ios)) | |
542 | atomic64_set(&fnic_stats->io_stats.max_active_ios, | |
543 | atomic64_read(&fnic_stats->io_stats.active_ios)); | |
544 | ||
14eb5d90 HP |
545 | /* REVISIT: Use per IO lock in the final code */ |
546 | CMD_FLAGS(sc) |= FNIC_IO_ISSUED; | |
5df6d737 AJ |
547 | } |
548 | out: | |
4d7007b4 HP |
549 | cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | |
550 | (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | | |
551 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | | |
552 | sc->cmnd[5]); | |
553 | ||
554 | FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, | |
555 | sc->request->tag, sc, io_req, | |
556 | sg_count, cmd_trace, | |
557 | (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); | |
03298552 | 558 | atomic_dec(&fnic->in_flight); |
5df6d737 AJ |
559 | /* acquire host lock before returning to SCSI */ |
560 | spin_lock(lp->host->host_lock); | |
561 | return ret; | |
562 | } | |
563 | ||
f281233d JG |
564 | DEF_SCSI_QCMD(fnic_queuecommand) |
565 | ||
5df6d737 AJ |
566 | /* |
567 | * fnic_fcpio_fw_reset_cmpl_handler | |
568 | * Routine to handle fw reset completion | |
569 | */ | |
570 | static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, | |
571 | struct fcpio_fw_req *desc) | |
572 | { | |
573 | u8 type; | |
574 | u8 hdr_status; | |
575 | struct fcpio_tag tag; | |
576 | int ret = 0; | |
5df6d737 | 577 | unsigned long flags; |
67125b02 | 578 | struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; |
5df6d737 AJ |
579 | |
580 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
581 | ||
67125b02 HP |
582 | atomic64_inc(&reset_stats->fw_reset_completions); |
583 | ||
5df6d737 AJ |
584 | /* Clean up all outstanding io requests */ |
585 | fnic_cleanup_io(fnic, SCSI_NO_TAG); | |
586 | ||
67125b02 HP |
587 | atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); |
588 | atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); | |
589 | ||
5df6d737 AJ |
590 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
591 | ||
5df6d737 AJ |
592 | /* fnic should be in FC_TRANS_ETH_MODE */ |
593 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { | |
594 | /* Check status of reset completion */ | |
595 | if (!hdr_status) { | |
596 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
597 | "reset cmpl success\n"); | |
598 | /* Ready to send flogi out */ | |
599 | fnic->state = FNIC_IN_ETH_MODE; | |
600 | } else { | |
601 | FNIC_SCSI_DBG(KERN_DEBUG, | |
602 | fnic->lport->host, | |
603 | "fnic fw_reset : failed %s\n", | |
604 | fnic_fcpio_status_to_str(hdr_status)); | |
605 | ||
606 | /* | |
607 | * Unable to change to eth mode, cannot send out flogi | |
608 | * Change state to fc mode, so that subsequent Flogi | |
609 | * requests from libFC will cause more attempts to | |
610 | * reset the firmware. Free the cached flogi | |
611 | */ | |
612 | fnic->state = FNIC_IN_FC_MODE; | |
67125b02 | 613 | atomic64_inc(&reset_stats->fw_reset_failures); |
5df6d737 AJ |
614 | ret = -1; |
615 | } | |
616 | } else { | |
617 | FNIC_SCSI_DBG(KERN_DEBUG, | |
618 | fnic->lport->host, | |
619 | "Unexpected state %s while processing" | |
620 | " reset cmpl\n", fnic_state_to_str(fnic->state)); | |
67125b02 | 621 | atomic64_inc(&reset_stats->fw_reset_failures); |
5df6d737 AJ |
622 | ret = -1; |
623 | } | |
624 | ||
625 | /* Thread removing device blocks till firmware reset is complete */ | |
626 | if (fnic->remove_wait) | |
627 | complete(fnic->remove_wait); | |
628 | ||
629 | /* | |
630 | * If fnic is being removed, or fw reset failed | |
631 | * free the flogi frame. Else, send it out | |
632 | */ | |
633 | if (fnic->remove_wait || ret) { | |
5df6d737 | 634 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
78112e55 | 635 | skb_queue_purge(&fnic->tx_queue); |
5df6d737 AJ |
636 | goto reset_cmpl_handler_end; |
637 | } | |
638 | ||
639 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
640 | ||
78112e55 | 641 | fnic_flush_tx(fnic); |
5df6d737 AJ |
642 | |
643 | reset_cmpl_handler_end: | |
03298552 HP |
644 | fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); |
645 | ||
5df6d737 AJ |
646 | return ret; |
647 | } | |
648 | ||
649 | /* | |
650 | * fnic_fcpio_flogi_reg_cmpl_handler | |
651 | * Routine to handle flogi register completion | |
652 | */ | |
653 | static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, | |
654 | struct fcpio_fw_req *desc) | |
655 | { | |
656 | u8 type; | |
657 | u8 hdr_status; | |
658 | struct fcpio_tag tag; | |
659 | int ret = 0; | |
5df6d737 | 660 | unsigned long flags; |
5df6d737 AJ |
661 | |
662 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
663 | ||
664 | /* Update fnic state based on status of flogi reg completion */ | |
665 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
666 | ||
5df6d737 AJ |
667 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { |
668 | ||
669 | /* Check flogi registration completion status */ | |
670 | if (!hdr_status) { | |
671 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
672 | "flog reg succeeded\n"); | |
673 | fnic->state = FNIC_IN_FC_MODE; | |
674 | } else { | |
675 | FNIC_SCSI_DBG(KERN_DEBUG, | |
676 | fnic->lport->host, | |
677 | "fnic flogi reg :failed %s\n", | |
678 | fnic_fcpio_status_to_str(hdr_status)); | |
679 | fnic->state = FNIC_IN_ETH_MODE; | |
680 | ret = -1; | |
681 | } | |
682 | } else { | |
683 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
684 | "Unexpected fnic state %s while" | |
685 | " processing flogi reg completion\n", | |
686 | fnic_state_to_str(fnic->state)); | |
687 | ret = -1; | |
688 | } | |
689 | ||
78112e55 | 690 | if (!ret) { |
5df6d737 AJ |
691 | if (fnic->stop_rx_link_events) { |
692 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
693 | goto reg_cmpl_handler_end; | |
694 | } | |
5df6d737 AJ |
695 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
696 | ||
78112e55 | 697 | fnic_flush_tx(fnic); |
5df6d737 | 698 | queue_work(fnic_event_queue, &fnic->frame_work); |
5df6d737 AJ |
699 | } else { |
700 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
5df6d737 AJ |
701 | } |
702 | ||
703 | reg_cmpl_handler_end: | |
704 | return ret; | |
705 | } | |
706 | ||
707 | static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, | |
708 | u16 request_out) | |
709 | { | |
710 | if (wq->to_clean_index <= wq->to_use_index) { | |
711 | /* out of range, stale request_out index */ | |
712 | if (request_out < wq->to_clean_index || | |
713 | request_out >= wq->to_use_index) | |
714 | return 0; | |
715 | } else { | |
716 | /* out of range, stale request_out index */ | |
717 | if (request_out < wq->to_clean_index && | |
718 | request_out >= wq->to_use_index) | |
719 | return 0; | |
720 | } | |
721 | /* request_out index is in range */ | |
722 | return 1; | |
723 | } | |
724 | ||
725 | ||
726 | /* | |
727 | * Mark that ack received and store the Ack index. If there are multiple | |
728 | * acks received before Tx thread cleans it up, the latest value will be | |
729 | * used which is correct behavior. This state should be in the copy Wq | |
730 | * instead of in the fnic | |
731 | */ | |
732 | static inline void fnic_fcpio_ack_handler(struct fnic *fnic, | |
733 | unsigned int cq_index, | |
734 | struct fcpio_fw_req *desc) | |
735 | { | |
736 | struct vnic_wq_copy *wq; | |
737 | u16 request_out = desc->u.ack.request_out; | |
738 | unsigned long flags; | |
4d7007b4 | 739 | u64 *ox_id_tag = (u64 *)(void *)desc; |
5df6d737 AJ |
740 | |
741 | /* mark the ack state */ | |
742 | wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; | |
743 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); | |
744 | ||
67125b02 | 745 | fnic->fnic_stats.misc_stats.last_ack_time = jiffies; |
5df6d737 AJ |
746 | if (is_ack_index_in_range(wq, request_out)) { |
747 | fnic->fw_ack_index[0] = request_out; | |
748 | fnic->fw_ack_recd[0] = 1; | |
67125b02 HP |
749 | } else |
750 | atomic64_inc( | |
751 | &fnic->fnic_stats.misc_stats.ack_index_out_of_range); | |
752 | ||
5df6d737 | 753 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); |
4d7007b4 HP |
754 | FNIC_TRACE(fnic_fcpio_ack_handler, |
755 | fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], | |
756 | ox_id_tag[4], ox_id_tag[5]); | |
5df6d737 AJ |
757 | } |
758 | ||
759 | /* | |
760 | * fnic_fcpio_icmnd_cmpl_handler | |
761 | * Routine to handle icmnd completions | |
762 | */ | |
763 | static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, | |
764 | struct fcpio_fw_req *desc) | |
765 | { | |
766 | u8 type; | |
767 | u8 hdr_status; | |
768 | struct fcpio_tag tag; | |
769 | u32 id; | |
770 | u64 xfer_len = 0; | |
771 | struct fcpio_icmnd_cmpl *icmnd_cmpl; | |
772 | struct fnic_io_req *io_req; | |
773 | struct scsi_cmnd *sc; | |
67125b02 | 774 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 AJ |
775 | unsigned long flags; |
776 | spinlock_t *io_lock; | |
4d7007b4 | 777 | u64 cmd_trace; |
14eb5d90 | 778 | unsigned long start_time; |
5df6d737 AJ |
779 | |
780 | /* Decode the cmpl description to get the io_req id */ | |
781 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
782 | fcpio_tag_id_dec(&tag, &id); | |
14eb5d90 | 783 | icmnd_cmpl = &desc->u.icmnd_cmpl; |
5df6d737 | 784 | |
fc85799e | 785 | if (id >= fnic->fnic_max_tag_id) { |
03298552 HP |
786 | shost_printk(KERN_ERR, fnic->lport->host, |
787 | "Tag out of range tag %x hdr status = %s\n", | |
788 | id, fnic_fcpio_status_to_str(hdr_status)); | |
5df6d737 | 789 | return; |
03298552 | 790 | } |
5df6d737 AJ |
791 | |
792 | sc = scsi_host_find_tag(fnic->lport->host, id); | |
793 | WARN_ON_ONCE(!sc); | |
14eb5d90 | 794 | if (!sc) { |
67125b02 | 795 | atomic64_inc(&fnic_stats->io_stats.sc_null); |
14eb5d90 HP |
796 | shost_printk(KERN_ERR, fnic->lport->host, |
797 | "icmnd_cmpl sc is null - " | |
798 | "hdr status = %s tag = 0x%x desc = 0x%p\n", | |
799 | fnic_fcpio_status_to_str(hdr_status), id, desc); | |
4d7007b4 HP |
800 | FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, |
801 | fnic->lport->host->host_no, id, | |
802 | ((u64)icmnd_cmpl->_resvd0[1] << 16 | | |
803 | (u64)icmnd_cmpl->_resvd0[0]), | |
804 | ((u64)hdr_status << 16 | | |
805 | (u64)icmnd_cmpl->scsi_status << 8 | | |
806 | (u64)icmnd_cmpl->flags), desc, | |
807 | (u64)icmnd_cmpl->residual, 0); | |
5df6d737 | 808 | return; |
14eb5d90 | 809 | } |
5df6d737 AJ |
810 | |
811 | io_lock = fnic_io_lock_hash(fnic, sc); | |
812 | spin_lock_irqsave(io_lock, flags); | |
813 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
814 | WARN_ON_ONCE(!io_req); | |
815 | if (!io_req) { | |
67125b02 | 816 | atomic64_inc(&fnic_stats->io_stats.ioreq_null); |
14eb5d90 | 817 | CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; |
5df6d737 | 818 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 HP |
819 | shost_printk(KERN_ERR, fnic->lport->host, |
820 | "icmnd_cmpl io_req is null - " | |
821 | "hdr status = %s tag = 0x%x sc 0x%p\n", | |
822 | fnic_fcpio_status_to_str(hdr_status), id, sc); | |
5df6d737 AJ |
823 | return; |
824 | } | |
14eb5d90 | 825 | start_time = io_req->start_time; |
5df6d737 AJ |
826 | |
827 | /* firmware completed the io */ | |
828 | io_req->io_completed = 1; | |
829 | ||
830 | /* | |
831 | * if SCSI-ML has already issued abort on this command, | |
832 | * ignore completion of the IO. The abts path will clean it up | |
833 | */ | |
834 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
835 | spin_unlock_irqrestore(io_lock, flags); | |
14eb5d90 HP |
836 | CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; |
837 | switch (hdr_status) { | |
838 | case FCPIO_SUCCESS: | |
839 | CMD_FLAGS(sc) |= FNIC_IO_DONE; | |
840 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
841 | "icmnd_cmpl ABTS pending hdr status = %s " | |
842 | "sc 0x%p scsi_status %x residual %d\n", | |
843 | fnic_fcpio_status_to_str(hdr_status), sc, | |
844 | icmnd_cmpl->scsi_status, | |
845 | icmnd_cmpl->residual); | |
846 | break; | |
847 | case FCPIO_ABORTED: | |
848 | CMD_FLAGS(sc) |= FNIC_IO_ABORTED; | |
849 | break; | |
850 | default: | |
851 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
852 | "icmnd_cmpl abts pending " | |
853 | "hdr status = %s tag = 0x%x sc = 0x%p\n", | |
854 | fnic_fcpio_status_to_str(hdr_status), | |
855 | id, sc); | |
856 | break; | |
857 | } | |
5df6d737 AJ |
858 | return; |
859 | } | |
860 | ||
861 | /* Mark the IO as complete */ | |
862 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
863 | ||
864 | icmnd_cmpl = &desc->u.icmnd_cmpl; | |
865 | ||
866 | switch (hdr_status) { | |
867 | case FCPIO_SUCCESS: | |
868 | sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; | |
869 | xfer_len = scsi_bufflen(sc); | |
870 | scsi_set_resid(sc, icmnd_cmpl->residual); | |
871 | ||
872 | if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) | |
873 | xfer_len -= icmnd_cmpl->residual; | |
874 | ||
67125b02 HP |
875 | if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) |
876 | atomic64_inc(&fnic_stats->misc_stats.queue_fulls); | |
5df6d737 AJ |
877 | break; |
878 | ||
879 | case FCPIO_TIMEOUT: /* request was timed out */ | |
67125b02 | 880 | atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); |
5df6d737 AJ |
881 | sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; |
882 | break; | |
883 | ||
884 | case FCPIO_ABORTED: /* request was aborted */ | |
67125b02 | 885 | atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); |
5df6d737 AJ |
886 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; |
887 | break; | |
888 | ||
889 | case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ | |
67125b02 | 890 | atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); |
5df6d737 AJ |
891 | scsi_set_resid(sc, icmnd_cmpl->residual); |
892 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
893 | break; | |
894 | ||
895 | case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ | |
67125b02 | 896 | atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); |
5df6d737 AJ |
897 | sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; |
898 | break; | |
67125b02 | 899 | |
5df6d737 | 900 | case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ |
67125b02 HP |
901 | atomic64_inc(&fnic_stats->io_stats.io_not_found); |
902 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
903 | break; | |
904 | ||
5df6d737 | 905 | case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ |
67125b02 HP |
906 | atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); |
907 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
908 | break; | |
909 | ||
5df6d737 | 910 | case FCPIO_FW_ERR: /* request was terminated due fw error */ |
67125b02 HP |
911 | atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); |
912 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
913 | break; | |
914 | ||
915 | case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ | |
916 | atomic64_inc(&fnic_stats->misc_stats.mss_invalid); | |
917 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
918 | break; | |
919 | ||
920 | case FCPIO_INVALID_HEADER: /* header contains invalid data */ | |
921 | case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ | |
922 | case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ | |
5df6d737 AJ |
923 | default: |
924 | shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", | |
925 | fnic_fcpio_status_to_str(hdr_status)); | |
926 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
927 | break; | |
928 | } | |
929 | ||
67125b02 HP |
930 | if (hdr_status != FCPIO_SUCCESS) { |
931 | atomic64_inc(&fnic_stats->io_stats.io_failures); | |
932 | shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", | |
933 | fnic_fcpio_status_to_str(hdr_status)); | |
934 | } | |
5df6d737 AJ |
935 | /* Break link with the SCSI command */ |
936 | CMD_SP(sc) = NULL; | |
14eb5d90 | 937 | CMD_FLAGS(sc) |= FNIC_IO_DONE; |
5df6d737 AJ |
938 | |
939 | spin_unlock_irqrestore(io_lock, flags); | |
940 | ||
941 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
942 | ||
943 | mempool_free(io_req, fnic->io_req_pool); | |
944 | ||
4d7007b4 HP |
945 | cmd_trace = ((u64)hdr_status << 56) | |
946 | (u64)icmnd_cmpl->scsi_status << 48 | | |
947 | (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | | |
948 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
949 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; | |
950 | ||
951 | FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, | |
952 | sc->device->host->host_no, id, sc, | |
953 | ((u64)icmnd_cmpl->_resvd0[1] << 56 | | |
954 | (u64)icmnd_cmpl->_resvd0[0] << 48 | | |
955 | jiffies_to_msecs(jiffies - start_time)), | |
956 | desc, cmd_trace, | |
957 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
958 | ||
5df6d737 AJ |
959 | if (sc->sc_data_direction == DMA_FROM_DEVICE) { |
960 | fnic->lport->host_stats.fcp_input_requests++; | |
961 | fnic->fcp_input_bytes += xfer_len; | |
962 | } else if (sc->sc_data_direction == DMA_TO_DEVICE) { | |
963 | fnic->lport->host_stats.fcp_output_requests++; | |
964 | fnic->fcp_output_bytes += xfer_len; | |
965 | } else | |
966 | fnic->lport->host_stats.fcp_control_requests++; | |
967 | ||
67125b02 HP |
968 | atomic64_dec(&fnic_stats->io_stats.active_ios); |
969 | if (atomic64_read(&fnic->io_cmpl_skip)) | |
970 | atomic64_dec(&fnic->io_cmpl_skip); | |
971 | else | |
972 | atomic64_inc(&fnic_stats->io_stats.io_completions); | |
973 | ||
5df6d737 AJ |
974 | /* Call SCSI completion function to complete the IO */ |
975 | if (sc->scsi_done) | |
976 | sc->scsi_done(sc); | |
5df6d737 AJ |
977 | } |
978 | ||
979 | /* fnic_fcpio_itmf_cmpl_handler | |
980 | * Routine to handle itmf completions | |
981 | */ | |
982 | static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, | |
983 | struct fcpio_fw_req *desc) | |
984 | { | |
985 | u8 type; | |
986 | u8 hdr_status; | |
987 | struct fcpio_tag tag; | |
988 | u32 id; | |
989 | struct scsi_cmnd *sc; | |
990 | struct fnic_io_req *io_req; | |
67125b02 HP |
991 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
992 | struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; | |
993 | struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; | |
994 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; | |
5df6d737 AJ |
995 | unsigned long flags; |
996 | spinlock_t *io_lock; | |
14eb5d90 | 997 | unsigned long start_time; |
5df6d737 AJ |
998 | |
999 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
1000 | fcpio_tag_id_dec(&tag, &id); | |
1001 | ||
fc85799e | 1002 | if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { |
03298552 HP |
1003 | shost_printk(KERN_ERR, fnic->lport->host, |
1004 | "Tag out of range tag %x hdr status = %s\n", | |
1005 | id, fnic_fcpio_status_to_str(hdr_status)); | |
5df6d737 | 1006 | return; |
03298552 | 1007 | } |
5df6d737 AJ |
1008 | |
1009 | sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); | |
1010 | WARN_ON_ONCE(!sc); | |
14eb5d90 | 1011 | if (!sc) { |
67125b02 | 1012 | atomic64_inc(&fnic_stats->io_stats.sc_null); |
14eb5d90 HP |
1013 | shost_printk(KERN_ERR, fnic->lport->host, |
1014 | "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", | |
1015 | fnic_fcpio_status_to_str(hdr_status), id); | |
5df6d737 | 1016 | return; |
14eb5d90 | 1017 | } |
5df6d737 AJ |
1018 | io_lock = fnic_io_lock_hash(fnic, sc); |
1019 | spin_lock_irqsave(io_lock, flags); | |
1020 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1021 | WARN_ON_ONCE(!io_req); | |
1022 | if (!io_req) { | |
67125b02 | 1023 | atomic64_inc(&fnic_stats->io_stats.ioreq_null); |
5df6d737 | 1024 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 HP |
1025 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; |
1026 | shost_printk(KERN_ERR, fnic->lport->host, | |
1027 | "itmf_cmpl io_req is null - " | |
1028 | "hdr status = %s tag = 0x%x sc 0x%p\n", | |
1029 | fnic_fcpio_status_to_str(hdr_status), id, sc); | |
5df6d737 AJ |
1030 | return; |
1031 | } | |
14eb5d90 | 1032 | start_time = io_req->start_time; |
5df6d737 | 1033 | |
03298552 HP |
1034 | if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { |
1035 | /* Abort and terminate completion of device reset req */ | |
1036 | /* REVISIT : Add asserts about various flags */ | |
1037 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1038 | "dev reset abts cmpl recd. id %x status %s\n", | |
1039 | id, fnic_fcpio_status_to_str(hdr_status)); | |
1040 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; | |
1041 | CMD_ABTS_STATUS(sc) = hdr_status; | |
1042 | CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; | |
1043 | if (io_req->abts_done) | |
1044 | complete(io_req->abts_done); | |
1045 | spin_unlock_irqrestore(io_lock, flags); | |
1046 | } else if (id & FNIC_TAG_ABORT) { | |
5df6d737 | 1047 | /* Completion of abort cmd */ |
67125b02 HP |
1048 | switch (hdr_status) { |
1049 | case FCPIO_SUCCESS: | |
1050 | break; | |
1051 | case FCPIO_TIMEOUT: | |
1052 | if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) | |
1053 | atomic64_inc(&abts_stats->abort_fw_timeouts); | |
1054 | else | |
1055 | atomic64_inc( | |
1056 | &term_stats->terminate_fw_timeouts); | |
1057 | break; | |
1058 | case FCPIO_IO_NOT_FOUND: | |
1059 | if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) | |
1060 | atomic64_inc(&abts_stats->abort_io_not_found); | |
1061 | else | |
1062 | atomic64_inc( | |
1063 | &term_stats->terminate_io_not_found); | |
1064 | break; | |
1065 | default: | |
1066 | if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) | |
1067 | atomic64_inc(&abts_stats->abort_failures); | |
1068 | else | |
1069 | atomic64_inc( | |
1070 | &term_stats->terminate_failures); | |
1071 | break; | |
1072 | } | |
5df6d737 AJ |
1073 | if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { |
1074 | /* This is a late completion. Ignore it */ | |
1075 | spin_unlock_irqrestore(io_lock, flags); | |
1076 | return; | |
1077 | } | |
5df6d737 | 1078 | CMD_ABTS_STATUS(sc) = hdr_status; |
14eb5d90 | 1079 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; |
67125b02 HP |
1080 | |
1081 | atomic64_dec(&fnic_stats->io_stats.active_ios); | |
1082 | if (atomic64_read(&fnic->io_cmpl_skip)) | |
1083 | atomic64_dec(&fnic->io_cmpl_skip); | |
1084 | else | |
1085 | atomic64_inc(&fnic_stats->io_stats.io_completions); | |
1086 | ||
1087 | if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) | |
1088 | atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); | |
1089 | ||
5df6d737 AJ |
1090 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1091 | "abts cmpl recd. id %d status %s\n", | |
1092 | (int)(id & FNIC_TAG_MASK), | |
1093 | fnic_fcpio_status_to_str(hdr_status)); | |
1094 | ||
1095 | /* | |
1096 | * If scsi_eh thread is blocked waiting for abts to complete, | |
1097 | * signal completion to it. IO will be cleaned in the thread | |
1098 | * else clean it in this context | |
1099 | */ | |
1100 | if (io_req->abts_done) { | |
1101 | complete(io_req->abts_done); | |
1102 | spin_unlock_irqrestore(io_lock, flags); | |
1103 | } else { | |
1104 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1105 | "abts cmpl, completing IO\n"); | |
1106 | CMD_SP(sc) = NULL; | |
1107 | sc->result = (DID_ERROR << 16); | |
1108 | ||
1109 | spin_unlock_irqrestore(io_lock, flags); | |
1110 | ||
1111 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
1112 | mempool_free(io_req, fnic->io_req_pool); | |
4d7007b4 HP |
1113 | if (sc->scsi_done) { |
1114 | FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, | |
1115 | sc->device->host->host_no, id, | |
1116 | sc, | |
1117 | jiffies_to_msecs(jiffies - start_time), | |
1118 | desc, | |
1119 | (((u64)hdr_status << 40) | | |
1120 | (u64)sc->cmnd[0] << 32 | | |
1121 | (u64)sc->cmnd[2] << 24 | | |
1122 | (u64)sc->cmnd[3] << 16 | | |
1123 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1124 | (((u64)CMD_FLAGS(sc) << 32) | | |
1125 | CMD_STATE(sc))); | |
5df6d737 | 1126 | sc->scsi_done(sc); |
4d7007b4 | 1127 | } |
5df6d737 AJ |
1128 | } |
1129 | ||
1130 | } else if (id & FNIC_TAG_DEV_RST) { | |
1131 | /* Completion of device reset */ | |
1132 | CMD_LR_STATUS(sc) = hdr_status; | |
03298552 HP |
1133 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { |
1134 | spin_unlock_irqrestore(io_lock, flags); | |
14eb5d90 | 1135 | CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; |
4d7007b4 HP |
1136 | FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, |
1137 | sc->device->host->host_no, id, sc, | |
1138 | jiffies_to_msecs(jiffies - start_time), | |
1139 | desc, 0, | |
1140 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
03298552 HP |
1141 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1142 | "Terminate pending " | |
1143 | "dev reset cmpl recd. id %d status %s\n", | |
1144 | (int)(id & FNIC_TAG_MASK), | |
1145 | fnic_fcpio_status_to_str(hdr_status)); | |
1146 | return; | |
1147 | } | |
1148 | if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { | |
1149 | /* Need to wait for terminate completion */ | |
1150 | spin_unlock_irqrestore(io_lock, flags); | |
4d7007b4 HP |
1151 | FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, |
1152 | sc->device->host->host_no, id, sc, | |
1153 | jiffies_to_msecs(jiffies - start_time), | |
1154 | desc, 0, | |
1155 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
03298552 HP |
1156 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1157 | "dev reset cmpl recd after time out. " | |
1158 | "id %d status %s\n", | |
1159 | (int)(id & FNIC_TAG_MASK), | |
1160 | fnic_fcpio_status_to_str(hdr_status)); | |
1161 | return; | |
1162 | } | |
5df6d737 | 1163 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; |
03298552 | 1164 | CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; |
5df6d737 AJ |
1165 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1166 | "dev reset cmpl recd. id %d status %s\n", | |
1167 | (int)(id & FNIC_TAG_MASK), | |
1168 | fnic_fcpio_status_to_str(hdr_status)); | |
1169 | if (io_req->dr_done) | |
1170 | complete(io_req->dr_done); | |
1171 | spin_unlock_irqrestore(io_lock, flags); | |
1172 | ||
1173 | } else { | |
1174 | shost_printk(KERN_ERR, fnic->lport->host, | |
1175 | "Unexpected itmf io state %s tag %x\n", | |
1176 | fnic_ioreq_state_to_str(CMD_STATE(sc)), id); | |
1177 | spin_unlock_irqrestore(io_lock, flags); | |
1178 | } | |
1179 | ||
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * fnic_fcpio_cmpl_handler | |
1184 | * Routine to service the cq for wq_copy | |
1185 | */ | |
1186 | static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, | |
1187 | unsigned int cq_index, | |
1188 | struct fcpio_fw_req *desc) | |
1189 | { | |
1190 | struct fnic *fnic = vnic_dev_priv(vdev); | |
5df6d737 | 1191 | |
67125b02 HP |
1192 | switch (desc->hdr.type) { |
1193 | case FCPIO_ICMND_CMPL: /* fw completed a command */ | |
1194 | case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ | |
1195 | case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ | |
1196 | case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ | |
1197 | case FCPIO_RESET_CMPL: /* fw completed reset */ | |
1198 | atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); | |
1199 | break; | |
1200 | default: | |
1201 | break; | |
1202 | } | |
1203 | ||
5df6d737 AJ |
1204 | switch (desc->hdr.type) { |
1205 | case FCPIO_ACK: /* fw copied copy wq desc to its queue */ | |
1206 | fnic_fcpio_ack_handler(fnic, cq_index, desc); | |
1207 | break; | |
1208 | ||
1209 | case FCPIO_ICMND_CMPL: /* fw completed a command */ | |
1210 | fnic_fcpio_icmnd_cmpl_handler(fnic, desc); | |
1211 | break; | |
1212 | ||
1213 | case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ | |
1214 | fnic_fcpio_itmf_cmpl_handler(fnic, desc); | |
1215 | break; | |
1216 | ||
1217 | case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ | |
78112e55 | 1218 | case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ |
03298552 | 1219 | fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); |
5df6d737 AJ |
1220 | break; |
1221 | ||
1222 | case FCPIO_RESET_CMPL: /* fw completed reset */ | |
03298552 | 1223 | fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); |
5df6d737 AJ |
1224 | break; |
1225 | ||
1226 | default: | |
1227 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1228 | "firmware completion type %d\n", | |
1229 | desc->hdr.type); | |
1230 | break; | |
1231 | } | |
1232 | ||
03298552 | 1233 | return 0; |
5df6d737 AJ |
1234 | } |
1235 | ||
1236 | /* | |
1237 | * fnic_wq_copy_cmpl_handler | |
1238 | * Routine to process wq copy | |
1239 | */ | |
1240 | int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) | |
1241 | { | |
1242 | unsigned int wq_work_done = 0; | |
1243 | unsigned int i, cq_index; | |
1244 | unsigned int cur_work_done; | |
1245 | ||
1246 | for (i = 0; i < fnic->wq_copy_count; i++) { | |
1247 | cq_index = i + fnic->raw_wq_count + fnic->rq_count; | |
1248 | cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], | |
1249 | fnic_fcpio_cmpl_handler, | |
1250 | copy_work_to_do); | |
1251 | wq_work_done += cur_work_done; | |
1252 | } | |
1253 | return wq_work_done; | |
1254 | } | |
1255 | ||
1256 | static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) | |
1257 | { | |
1259c5dc | 1258 | int i; |
5df6d737 AJ |
1259 | struct fnic_io_req *io_req; |
1260 | unsigned long flags = 0; | |
1261 | struct scsi_cmnd *sc; | |
1262 | spinlock_t *io_lock; | |
14eb5d90 | 1263 | unsigned long start_time = 0; |
67125b02 | 1264 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 | 1265 | |
fc85799e | 1266 | for (i = 0; i < fnic->fnic_max_tag_id; i++) { |
5df6d737 AJ |
1267 | if (i == exclude_id) |
1268 | continue; | |
1269 | ||
1259c5dc SB |
1270 | io_lock = fnic_io_lock_tag(fnic, i); |
1271 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 | 1272 | sc = scsi_host_find_tag(fnic->lport->host, i); |
1259c5dc SB |
1273 | if (!sc) { |
1274 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1275 | continue; |
1259c5dc | 1276 | } |
5df6d737 | 1277 | |
5df6d737 | 1278 | io_req = (struct fnic_io_req *)CMD_SP(sc); |
03298552 HP |
1279 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && |
1280 | !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { | |
1281 | /* | |
1282 | * We will be here only when FW completes reset | |
1283 | * without sending completions for outstanding ios. | |
1284 | */ | |
1285 | CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; | |
1286 | if (io_req && io_req->dr_done) | |
1287 | complete(io_req->dr_done); | |
1288 | else if (io_req && io_req->abts_done) | |
1289 | complete(io_req->abts_done); | |
1290 | spin_unlock_irqrestore(io_lock, flags); | |
1291 | continue; | |
1292 | } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { | |
1293 | spin_unlock_irqrestore(io_lock, flags); | |
1294 | continue; | |
1295 | } | |
5df6d737 AJ |
1296 | if (!io_req) { |
1297 | spin_unlock_irqrestore(io_lock, flags); | |
1298 | goto cleanup_scsi_cmd; | |
1299 | } | |
1300 | ||
1301 | CMD_SP(sc) = NULL; | |
1302 | ||
1303 | spin_unlock_irqrestore(io_lock, flags); | |
1304 | ||
1305 | /* | |
1306 | * If there is a scsi_cmnd associated with this io_req, then | |
1307 | * free the corresponding state | |
1308 | */ | |
14eb5d90 | 1309 | start_time = io_req->start_time; |
5df6d737 AJ |
1310 | fnic_release_ioreq_buf(fnic, io_req, sc); |
1311 | mempool_free(io_req, fnic->io_req_pool); | |
1312 | ||
1313 | cleanup_scsi_cmd: | |
1314 | sc->result = DID_TRANSPORT_DISRUPTED << 16; | |
1315 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:" | |
1316 | " DID_TRANSPORT_DISRUPTED\n"); | |
1317 | ||
67125b02 HP |
1318 | if (atomic64_read(&fnic->io_cmpl_skip)) |
1319 | atomic64_dec(&fnic->io_cmpl_skip); | |
1320 | else | |
1321 | atomic64_inc(&fnic_stats->io_stats.io_completions); | |
1322 | ||
5df6d737 | 1323 | /* Complete the command to SCSI */ |
4d7007b4 HP |
1324 | if (sc->scsi_done) { |
1325 | FNIC_TRACE(fnic_cleanup_io, | |
1326 | sc->device->host->host_no, i, sc, | |
1327 | jiffies_to_msecs(jiffies - start_time), | |
1328 | 0, ((u64)sc->cmnd[0] << 32 | | |
1329 | (u64)sc->cmnd[2] << 24 | | |
1330 | (u64)sc->cmnd[3] << 16 | | |
1331 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1332 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
1333 | ||
5df6d737 | 1334 | sc->scsi_done(sc); |
4d7007b4 | 1335 | } |
5df6d737 AJ |
1336 | } |
1337 | } | |
1338 | ||
1339 | void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, | |
1340 | struct fcpio_host_req *desc) | |
1341 | { | |
1342 | u32 id; | |
1343 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
1344 | struct fnic_io_req *io_req; | |
1345 | struct scsi_cmnd *sc; | |
1346 | unsigned long flags; | |
1347 | spinlock_t *io_lock; | |
14eb5d90 | 1348 | unsigned long start_time = 0; |
5df6d737 AJ |
1349 | |
1350 | /* get the tag reference */ | |
1351 | fcpio_tag_id_dec(&desc->hdr.tag, &id); | |
1352 | id &= FNIC_TAG_MASK; | |
1353 | ||
fc85799e | 1354 | if (id >= fnic->fnic_max_tag_id) |
5df6d737 AJ |
1355 | return; |
1356 | ||
1357 | sc = scsi_host_find_tag(fnic->lport->host, id); | |
1358 | if (!sc) | |
1359 | return; | |
1360 | ||
1361 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1362 | spin_lock_irqsave(io_lock, flags); | |
1363 | ||
1364 | /* Get the IO context which this desc refers to */ | |
1365 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1366 | ||
1367 | /* fnic interrupts are turned off by now */ | |
1368 | ||
1369 | if (!io_req) { | |
1370 | spin_unlock_irqrestore(io_lock, flags); | |
1371 | goto wq_copy_cleanup_scsi_cmd; | |
1372 | } | |
1373 | ||
1374 | CMD_SP(sc) = NULL; | |
1375 | ||
1376 | spin_unlock_irqrestore(io_lock, flags); | |
1377 | ||
14eb5d90 | 1378 | start_time = io_req->start_time; |
5df6d737 AJ |
1379 | fnic_release_ioreq_buf(fnic, io_req, sc); |
1380 | mempool_free(io_req, fnic->io_req_pool); | |
1381 | ||
1382 | wq_copy_cleanup_scsi_cmd: | |
1383 | sc->result = DID_NO_CONNECT << 16; | |
1384 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" | |
1385 | " DID_NO_CONNECT\n"); | |
1386 | ||
4d7007b4 HP |
1387 | if (sc->scsi_done) { |
1388 | FNIC_TRACE(fnic_wq_copy_cleanup_handler, | |
1389 | sc->device->host->host_no, id, sc, | |
1390 | jiffies_to_msecs(jiffies - start_time), | |
1391 | 0, ((u64)sc->cmnd[0] << 32 | | |
1392 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
1393 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1394 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
1395 | ||
5df6d737 | 1396 | sc->scsi_done(sc); |
4d7007b4 | 1397 | } |
5df6d737 AJ |
1398 | } |
1399 | ||
1400 | static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, | |
1401 | u32 task_req, u8 *fc_lun, | |
1402 | struct fnic_io_req *io_req) | |
1403 | { | |
1404 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
03298552 | 1405 | struct Scsi_Host *host = fnic->lport->host; |
67125b02 | 1406 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; |
5df6d737 AJ |
1407 | unsigned long flags; |
1408 | ||
03298552 HP |
1409 | spin_lock_irqsave(host->host_lock, flags); |
1410 | if (unlikely(fnic_chk_state_flags_locked(fnic, | |
1411 | FNIC_FLAGS_IO_BLOCKED))) { | |
1412 | spin_unlock_irqrestore(host->host_lock, flags); | |
1413 | return 1; | |
1414 | } else | |
1415 | atomic_inc(&fnic->in_flight); | |
1416 | spin_unlock_irqrestore(host->host_lock, flags); | |
1417 | ||
5df6d737 AJ |
1418 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); |
1419 | ||
1420 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
1421 | free_wq_copy_descs(fnic, wq); | |
1422 | ||
1423 | if (!vnic_wq_copy_desc_avail(wq)) { | |
1424 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
03298552 | 1425 | atomic_dec(&fnic->in_flight); |
14eb5d90 | 1426 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
03298552 | 1427 | "fnic_queue_abort_io_req: failure: no descriptors\n"); |
67125b02 | 1428 | atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); |
5df6d737 AJ |
1429 | return 1; |
1430 | } | |
1431 | fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, | |
1432 | 0, task_req, tag, fc_lun, io_req->port_id, | |
1433 | fnic->config.ra_tov, fnic->config.ed_tov); | |
1434 | ||
67125b02 HP |
1435 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
1436 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
1437 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
1438 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
1439 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
1440 | ||
5df6d737 | 1441 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); |
03298552 HP |
1442 | atomic_dec(&fnic->in_flight); |
1443 | ||
5df6d737 AJ |
1444 | return 0; |
1445 | } | |
1446 | ||
03298552 | 1447 | static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) |
5df6d737 AJ |
1448 | { |
1449 | int tag; | |
03298552 | 1450 | int abt_tag; |
67125b02 | 1451 | int term_cnt = 0; |
5df6d737 AJ |
1452 | struct fnic_io_req *io_req; |
1453 | spinlock_t *io_lock; | |
1454 | unsigned long flags; | |
1455 | struct scsi_cmnd *sc; | |
67125b02 HP |
1456 | struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; |
1457 | struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; | |
5df6d737 AJ |
1458 | struct scsi_lun fc_lun; |
1459 | enum fnic_ioreq_state old_ioreq_state; | |
1460 | ||
1461 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1462 | fnic->lport->host, | |
03298552 | 1463 | "fnic_rport_exch_reset called portid 0x%06x\n", |
5df6d737 AJ |
1464 | port_id); |
1465 | ||
1466 | if (fnic->in_remove) | |
1467 | return; | |
1468 | ||
fc85799e | 1469 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
03298552 | 1470 | abt_tag = tag; |
1259c5dc SB |
1471 | io_lock = fnic_io_lock_tag(fnic, tag); |
1472 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 | 1473 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
1259c5dc SB |
1474 | if (!sc) { |
1475 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1476 | continue; |
1259c5dc | 1477 | } |
5df6d737 AJ |
1478 | |
1479 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1480 | ||
1481 | if (!io_req || io_req->port_id != port_id) { | |
1482 | spin_unlock_irqrestore(io_lock, flags); | |
1483 | continue; | |
1484 | } | |
1485 | ||
03298552 | 1486 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && |
14eb5d90 | 1487 | (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { |
03298552 HP |
1488 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1489 | "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", | |
1490 | sc); | |
1491 | spin_unlock_irqrestore(io_lock, flags); | |
1492 | continue; | |
1493 | } | |
1494 | ||
5df6d737 AJ |
1495 | /* |
1496 | * Found IO that is still pending with firmware and | |
1497 | * belongs to rport that went away | |
1498 | */ | |
1499 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1500 | spin_unlock_irqrestore(io_lock, flags); | |
1501 | continue; | |
1502 | } | |
03298552 HP |
1503 | if (io_req->abts_done) { |
1504 | shost_printk(KERN_ERR, fnic->lport->host, | |
1505 | "fnic_rport_exch_reset: io_req->abts_done is set " | |
1506 | "state is %s\n", | |
1507 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
1508 | } | |
1509 | ||
14eb5d90 HP |
1510 | if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { |
1511 | shost_printk(KERN_ERR, fnic->lport->host, | |
1512 | "rport_exch_reset " | |
1513 | "IO not yet issued %p tag 0x%x flags " | |
1514 | "%x state %d\n", | |
1515 | sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); | |
1516 | } | |
5df6d737 AJ |
1517 | old_ioreq_state = CMD_STATE(sc); |
1518 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1519 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
03298552 | 1520 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { |
67125b02 | 1521 | atomic64_inc(&reset_stats->device_reset_terminates); |
03298552 HP |
1522 | abt_tag = (tag | FNIC_TAG_DEV_RST); |
1523 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1524 | "fnic_rport_exch_reset dev rst sc 0x%p\n", | |
1525 | sc); | |
1526 | } | |
5df6d737 AJ |
1527 | |
1528 | BUG_ON(io_req->abts_done); | |
1529 | ||
1530 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1531 | "fnic_rport_reset_exch: Issuing abts\n"); | |
1532 | ||
1533 | spin_unlock_irqrestore(io_lock, flags); | |
1534 | ||
1535 | /* Now queue the abort command to firmware */ | |
1536 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1537 | ||
03298552 | 1538 | if (fnic_queue_abort_io_req(fnic, abt_tag, |
5df6d737 AJ |
1539 | FCPIO_ITMF_ABT_TASK_TERM, |
1540 | fc_lun.scsi_lun, io_req)) { | |
1541 | /* | |
1542 | * Revert the cmd state back to old state, if | |
25985edc | 1543 | * it hasn't changed in between. This cmd will get |
5df6d737 AJ |
1544 | * aborted later by scsi_eh, or cleaned up during |
1545 | * lun reset | |
1546 | */ | |
5df6d737 AJ |
1547 | spin_lock_irqsave(io_lock, flags); |
1548 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) | |
1549 | CMD_STATE(sc) = old_ioreq_state; | |
1550 | spin_unlock_irqrestore(io_lock, flags); | |
03298552 HP |
1551 | } else { |
1552 | spin_lock_irqsave(io_lock, flags); | |
a0bf1ca2 HP |
1553 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) |
1554 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
14eb5d90 HP |
1555 | else |
1556 | CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; | |
03298552 | 1557 | spin_unlock_irqrestore(io_lock, flags); |
67125b02 HP |
1558 | atomic64_inc(&term_stats->terminates); |
1559 | term_cnt++; | |
5df6d737 AJ |
1560 | } |
1561 | } | |
67125b02 HP |
1562 | if (term_cnt > atomic64_read(&term_stats->max_terminates)) |
1563 | atomic64_set(&term_stats->max_terminates, term_cnt); | |
5df6d737 AJ |
1564 | |
1565 | } | |
1566 | ||
1567 | void fnic_terminate_rport_io(struct fc_rport *rport) | |
1568 | { | |
1569 | int tag; | |
03298552 | 1570 | int abt_tag; |
67125b02 | 1571 | int term_cnt = 0; |
5df6d737 AJ |
1572 | struct fnic_io_req *io_req; |
1573 | spinlock_t *io_lock; | |
1574 | unsigned long flags; | |
1575 | struct scsi_cmnd *sc; | |
1576 | struct scsi_lun fc_lun; | |
d0385d92 SB |
1577 | struct fc_rport_libfc_priv *rdata; |
1578 | struct fc_lport *lport; | |
1579 | struct fnic *fnic; | |
5df6d737 | 1580 | struct fc_rport *cmd_rport; |
67125b02 HP |
1581 | struct reset_stats *reset_stats; |
1582 | struct terminate_stats *term_stats; | |
5df6d737 AJ |
1583 | enum fnic_ioreq_state old_ioreq_state; |
1584 | ||
d0385d92 SB |
1585 | if (!rport) { |
1586 | printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); | |
1587 | return; | |
1588 | } | |
1589 | rdata = rport->dd_data; | |
1590 | ||
1591 | if (!rdata) { | |
1592 | printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); | |
1593 | return; | |
1594 | } | |
1595 | lport = rdata->local_port; | |
1596 | ||
1597 | if (!lport) { | |
1598 | printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); | |
1599 | return; | |
1600 | } | |
1601 | fnic = lport_priv(lport); | |
5df6d737 AJ |
1602 | FNIC_SCSI_DBG(KERN_DEBUG, |
1603 | fnic->lport->host, "fnic_terminate_rport_io called" | |
03298552 HP |
1604 | " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", |
1605 | rport->port_name, rport->node_name, rport, | |
5df6d737 AJ |
1606 | rport->port_id); |
1607 | ||
1608 | if (fnic->in_remove) | |
1609 | return; | |
1610 | ||
67125b02 HP |
1611 | reset_stats = &fnic->fnic_stats.reset_stats; |
1612 | term_stats = &fnic->fnic_stats.term_stats; | |
1613 | ||
fc85799e | 1614 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
03298552 | 1615 | abt_tag = tag; |
1259c5dc SB |
1616 | io_lock = fnic_io_lock_tag(fnic, tag); |
1617 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 | 1618 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
1259c5dc SB |
1619 | if (!sc) { |
1620 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1621 | continue; |
1259c5dc | 1622 | } |
5df6d737 AJ |
1623 | |
1624 | cmd_rport = starget_to_rport(scsi_target(sc->device)); | |
1259c5dc SB |
1625 | if (rport != cmd_rport) { |
1626 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1627 | continue; |
1259c5dc | 1628 | } |
5df6d737 AJ |
1629 | |
1630 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1631 | ||
1632 | if (!io_req || rport != cmd_rport) { | |
1633 | spin_unlock_irqrestore(io_lock, flags); | |
1634 | continue; | |
1635 | } | |
1636 | ||
03298552 | 1637 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && |
14eb5d90 | 1638 | (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { |
03298552 HP |
1639 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1640 | "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", | |
1641 | sc); | |
1642 | spin_unlock_irqrestore(io_lock, flags); | |
1643 | continue; | |
1644 | } | |
5df6d737 AJ |
1645 | /* |
1646 | * Found IO that is still pending with firmware and | |
1647 | * belongs to rport that went away | |
1648 | */ | |
1649 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1650 | spin_unlock_irqrestore(io_lock, flags); | |
1651 | continue; | |
1652 | } | |
03298552 HP |
1653 | if (io_req->abts_done) { |
1654 | shost_printk(KERN_ERR, fnic->lport->host, | |
1655 | "fnic_terminate_rport_io: io_req->abts_done is set " | |
1656 | "state is %s\n", | |
1657 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
1658 | } | |
14eb5d90 HP |
1659 | if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { |
1660 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
1661 | "fnic_terminate_rport_io " | |
1662 | "IO not yet issued %p tag 0x%x flags " | |
1663 | "%x state %d\n", | |
1664 | sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); | |
1665 | } | |
5df6d737 AJ |
1666 | old_ioreq_state = CMD_STATE(sc); |
1667 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1668 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
03298552 | 1669 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { |
67125b02 | 1670 | atomic64_inc(&reset_stats->device_reset_terminates); |
03298552 HP |
1671 | abt_tag = (tag | FNIC_TAG_DEV_RST); |
1672 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1673 | "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); | |
1674 | } | |
5df6d737 AJ |
1675 | |
1676 | BUG_ON(io_req->abts_done); | |
1677 | ||
1678 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1679 | fnic->lport->host, | |
1680 | "fnic_terminate_rport_io: Issuing abts\n"); | |
1681 | ||
1682 | spin_unlock_irqrestore(io_lock, flags); | |
1683 | ||
1684 | /* Now queue the abort command to firmware */ | |
1685 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1686 | ||
03298552 | 1687 | if (fnic_queue_abort_io_req(fnic, abt_tag, |
5df6d737 AJ |
1688 | FCPIO_ITMF_ABT_TASK_TERM, |
1689 | fc_lun.scsi_lun, io_req)) { | |
1690 | /* | |
1691 | * Revert the cmd state back to old state, if | |
25985edc | 1692 | * it hasn't changed in between. This cmd will get |
5df6d737 AJ |
1693 | * aborted later by scsi_eh, or cleaned up during |
1694 | * lun reset | |
1695 | */ | |
5df6d737 AJ |
1696 | spin_lock_irqsave(io_lock, flags); |
1697 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) | |
1698 | CMD_STATE(sc) = old_ioreq_state; | |
1699 | spin_unlock_irqrestore(io_lock, flags); | |
03298552 HP |
1700 | } else { |
1701 | spin_lock_irqsave(io_lock, flags); | |
a0bf1ca2 HP |
1702 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) |
1703 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
14eb5d90 HP |
1704 | else |
1705 | CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; | |
03298552 | 1706 | spin_unlock_irqrestore(io_lock, flags); |
67125b02 HP |
1707 | atomic64_inc(&term_stats->terminates); |
1708 | term_cnt++; | |
5df6d737 AJ |
1709 | } |
1710 | } | |
67125b02 HP |
1711 | if (term_cnt > atomic64_read(&term_stats->max_terminates)) |
1712 | atomic64_set(&term_stats->max_terminates, term_cnt); | |
5df6d737 AJ |
1713 | |
1714 | } | |
1715 | ||
5df6d737 AJ |
1716 | /* |
1717 | * This function is exported to SCSI for sending abort cmnds. | |
1718 | * A SCSI IO is represented by a io_req in the driver. | |
1719 | * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. | |
1720 | */ | |
1721 | int fnic_abort_cmd(struct scsi_cmnd *sc) | |
1722 | { | |
1723 | struct fc_lport *lp; | |
1724 | struct fnic *fnic; | |
4d7007b4 | 1725 | struct fnic_io_req *io_req = NULL; |
5df6d737 AJ |
1726 | struct fc_rport *rport; |
1727 | spinlock_t *io_lock; | |
1728 | unsigned long flags; | |
14eb5d90 | 1729 | unsigned long start_time = 0; |
5df6d737 | 1730 | int ret = SUCCESS; |
14eb5d90 | 1731 | u32 task_req = 0; |
5df6d737 | 1732 | struct scsi_lun fc_lun; |
67125b02 HP |
1733 | struct fnic_stats *fnic_stats; |
1734 | struct abort_stats *abts_stats; | |
1735 | struct terminate_stats *term_stats; | |
03298552 | 1736 | int tag; |
5df6d737 AJ |
1737 | DECLARE_COMPLETION_ONSTACK(tm_done); |
1738 | ||
1739 | /* Wait for rport to unblock */ | |
65d430fa | 1740 | fc_block_scsi_eh(sc); |
5df6d737 AJ |
1741 | |
1742 | /* Get local-port, check ready and link up */ | |
1743 | lp = shost_priv(sc->device->host); | |
1744 | ||
1745 | fnic = lport_priv(lp); | |
67125b02 HP |
1746 | fnic_stats = &fnic->fnic_stats; |
1747 | abts_stats = &fnic->fnic_stats.abts_stats; | |
1748 | term_stats = &fnic->fnic_stats.term_stats; | |
1749 | ||
0db6f435 | 1750 | rport = starget_to_rport(scsi_target(sc->device)); |
03298552 HP |
1751 | tag = sc->request->tag; |
1752 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1753 | fnic->lport->host, | |
1754 | "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %x flags %x\n", | |
1755 | rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); | |
1756 | ||
1757 | CMD_FLAGS(sc) = FNIC_NO_FLAGS; | |
1758 | ||
5df6d737 AJ |
1759 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) { |
1760 | ret = FAILED; | |
1761 | goto fnic_abort_cmd_end; | |
1762 | } | |
1763 | ||
1764 | /* | |
1765 | * Avoid a race between SCSI issuing the abort and the device | |
1766 | * completing the command. | |
1767 | * | |
1768 | * If the command is already completed by the fw cmpl code, | |
1769 | * we just return SUCCESS from here. This means that the abort | |
1770 | * succeeded. In the SCSI ML, since the timeout for command has | |
1771 | * happened, the completion wont actually complete the command | |
1772 | * and it will be considered as an aborted command | |
1773 | * | |
1774 | * The CMD_SP will not be cleared except while holding io_req_lock. | |
1775 | */ | |
1776 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1777 | spin_lock_irqsave(io_lock, flags); | |
1778 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1779 | if (!io_req) { | |
1780 | spin_unlock_irqrestore(io_lock, flags); | |
1781 | goto fnic_abort_cmd_end; | |
1782 | } | |
1783 | ||
1784 | io_req->abts_done = &tm_done; | |
1785 | ||
1786 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1787 | spin_unlock_irqrestore(io_lock, flags); | |
1788 | goto wait_pending; | |
1789 | } | |
1790 | /* | |
1791 | * Command is still pending, need to abort it | |
1792 | * If the firmware completes the command after this point, | |
1793 | * the completion wont be done till mid-layer, since abort | |
1794 | * has already started. | |
1795 | */ | |
1796 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1797 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
1798 | ||
1799 | spin_unlock_irqrestore(io_lock, flags); | |
1800 | ||
1801 | /* | |
1802 | * Check readiness of the remote port. If the path to remote | |
1803 | * port is up, then send abts to the remote port to terminate | |
1804 | * the IO. Else, just locally terminate the IO in the firmware | |
1805 | */ | |
5df6d737 AJ |
1806 | if (fc_remote_port_chkready(rport) == 0) |
1807 | task_req = FCPIO_ITMF_ABT_TASK; | |
67125b02 HP |
1808 | else { |
1809 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); | |
5df6d737 | 1810 | task_req = FCPIO_ITMF_ABT_TASK_TERM; |
67125b02 | 1811 | } |
5df6d737 AJ |
1812 | |
1813 | /* Now queue the abort command to firmware */ | |
1814 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1815 | ||
1816 | if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, | |
1817 | fc_lun.scsi_lun, io_req)) { | |
1818 | spin_lock_irqsave(io_lock, flags); | |
1819 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1820 | if (io_req) | |
1821 | io_req->abts_done = NULL; | |
1822 | spin_unlock_irqrestore(io_lock, flags); | |
1823 | ret = FAILED; | |
1824 | goto fnic_abort_cmd_end; | |
1825 | } | |
67125b02 | 1826 | if (task_req == FCPIO_ITMF_ABT_TASK) { |
14eb5d90 | 1827 | CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; |
67125b02 HP |
1828 | atomic64_inc(&fnic_stats->abts_stats.aborts); |
1829 | } else { | |
14eb5d90 | 1830 | CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; |
67125b02 HP |
1831 | atomic64_inc(&fnic_stats->term_stats.terminates); |
1832 | } | |
5df6d737 AJ |
1833 | |
1834 | /* | |
1835 | * We queued an abort IO, wait for its completion. | |
1836 | * Once the firmware completes the abort command, it will | |
1837 | * wake up this thread. | |
1838 | */ | |
1839 | wait_pending: | |
1840 | wait_for_completion_timeout(&tm_done, | |
1841 | msecs_to_jiffies | |
1842 | (2 * fnic->config.ra_tov + | |
1843 | fnic->config.ed_tov)); | |
1844 | ||
1845 | /* Check the abort status */ | |
1846 | spin_lock_irqsave(io_lock, flags); | |
1847 | ||
1848 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1849 | if (!io_req) { | |
67125b02 | 1850 | atomic64_inc(&fnic_stats->io_stats.ioreq_null); |
5df6d737 | 1851 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 | 1852 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; |
5df6d737 AJ |
1853 | ret = FAILED; |
1854 | goto fnic_abort_cmd_end; | |
1855 | } | |
1856 | io_req->abts_done = NULL; | |
1857 | ||
1858 | /* fw did not complete abort, timed out */ | |
1259c5dc | 1859 | if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { |
5df6d737 | 1860 | spin_unlock_irqrestore(io_lock, flags); |
67125b02 HP |
1861 | if (task_req == FCPIO_ITMF_ABT_TASK) { |
1862 | FNIC_SCSI_DBG(KERN_INFO, | |
1863 | fnic->lport->host, "Abort Driver Timeout\n"); | |
1864 | atomic64_inc(&abts_stats->abort_drv_timeouts); | |
1865 | } else { | |
1866 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
1867 | "Terminate Driver Timeout\n"); | |
1868 | atomic64_inc(&term_stats->terminate_drv_timeouts); | |
1869 | } | |
14eb5d90 | 1870 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; |
5df6d737 AJ |
1871 | ret = FAILED; |
1872 | goto fnic_abort_cmd_end; | |
1873 | } | |
1874 | ||
1259c5dc SB |
1875 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; |
1876 | ||
5df6d737 AJ |
1877 | /* |
1878 | * firmware completed the abort, check the status, | |
1879 | * free the io_req irrespective of failure or success | |
1880 | */ | |
1881 | if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS) | |
1882 | ret = FAILED; | |
1883 | ||
1884 | CMD_SP(sc) = NULL; | |
1885 | ||
1886 | spin_unlock_irqrestore(io_lock, flags); | |
1887 | ||
14eb5d90 | 1888 | start_time = io_req->start_time; |
5df6d737 AJ |
1889 | fnic_release_ioreq_buf(fnic, io_req, sc); |
1890 | mempool_free(io_req, fnic->io_req_pool); | |
1891 | ||
1892 | fnic_abort_cmd_end: | |
4d7007b4 HP |
1893 | FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, |
1894 | sc->request->tag, sc, | |
1895 | jiffies_to_msecs(jiffies - start_time), | |
1896 | 0, ((u64)sc->cmnd[0] << 32 | | |
1897 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
1898 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1899 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
1900 | ||
5df6d737 | 1901 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
14eb5d90 | 1902 | "Returning from abort cmd type %x %s\n", task_req, |
5df6d737 AJ |
1903 | (ret == SUCCESS) ? |
1904 | "SUCCESS" : "FAILED"); | |
1905 | return ret; | |
1906 | } | |
1907 | ||
1908 | static inline int fnic_queue_dr_io_req(struct fnic *fnic, | |
1909 | struct scsi_cmnd *sc, | |
1910 | struct fnic_io_req *io_req) | |
1911 | { | |
1912 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
03298552 | 1913 | struct Scsi_Host *host = fnic->lport->host; |
67125b02 | 1914 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; |
5df6d737 AJ |
1915 | struct scsi_lun fc_lun; |
1916 | int ret = 0; | |
1917 | unsigned long intr_flags; | |
1918 | ||
03298552 HP |
1919 | spin_lock_irqsave(host->host_lock, intr_flags); |
1920 | if (unlikely(fnic_chk_state_flags_locked(fnic, | |
1921 | FNIC_FLAGS_IO_BLOCKED))) { | |
1922 | spin_unlock_irqrestore(host->host_lock, intr_flags); | |
1923 | return FAILED; | |
1924 | } else | |
1925 | atomic_inc(&fnic->in_flight); | |
1926 | spin_unlock_irqrestore(host->host_lock, intr_flags); | |
1927 | ||
5df6d737 AJ |
1928 | spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); |
1929 | ||
1930 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
1931 | free_wq_copy_descs(fnic, wq); | |
1932 | ||
1933 | if (!vnic_wq_copy_desc_avail(wq)) { | |
14eb5d90 HP |
1934 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1935 | "queue_dr_io_req failure - no descriptors\n"); | |
67125b02 | 1936 | atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); |
5df6d737 AJ |
1937 | ret = -EAGAIN; |
1938 | goto lr_io_req_end; | |
1939 | } | |
1940 | ||
1941 | /* fill in the lun info */ | |
1942 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1943 | ||
1944 | fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, | |
1945 | 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, | |
1946 | fc_lun.scsi_lun, io_req->port_id, | |
1947 | fnic->config.ra_tov, fnic->config.ed_tov); | |
1948 | ||
67125b02 HP |
1949 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
1950 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
1951 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
1952 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
1953 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
1954 | ||
5df6d737 AJ |
1955 | lr_io_req_end: |
1956 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
03298552 | 1957 | atomic_dec(&fnic->in_flight); |
5df6d737 AJ |
1958 | |
1959 | return ret; | |
1960 | } | |
1961 | ||
1962 | /* | |
1963 | * Clean up any pending aborts on the lun | |
1964 | * For each outstanding IO on this lun, whose abort is not completed by fw, | |
1965 | * issue a local abort. Wait for abort to complete. Return 0 if all commands | |
1966 | * successfully aborted, 1 otherwise | |
1967 | */ | |
1968 | static int fnic_clean_pending_aborts(struct fnic *fnic, | |
1969 | struct scsi_cmnd *lr_sc) | |
1970 | { | |
a0bf1ca2 | 1971 | int tag, abt_tag; |
5df6d737 AJ |
1972 | struct fnic_io_req *io_req; |
1973 | spinlock_t *io_lock; | |
1974 | unsigned long flags; | |
1975 | int ret = 0; | |
1976 | struct scsi_cmnd *sc; | |
5df6d737 AJ |
1977 | struct scsi_lun fc_lun; |
1978 | struct scsi_device *lun_dev = lr_sc->device; | |
1979 | DECLARE_COMPLETION_ONSTACK(tm_done); | |
a0bf1ca2 | 1980 | enum fnic_ioreq_state old_ioreq_state; |
5df6d737 | 1981 | |
fc85799e | 1982 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
1259c5dc SB |
1983 | io_lock = fnic_io_lock_tag(fnic, tag); |
1984 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 AJ |
1985 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
1986 | /* | |
1987 | * ignore this lun reset cmd or cmds that do not belong to | |
1988 | * this lun | |
1989 | */ | |
1259c5dc SB |
1990 | if (!sc || sc == lr_sc || sc->device != lun_dev) { |
1991 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1992 | continue; |
1259c5dc | 1993 | } |
5df6d737 AJ |
1994 | |
1995 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1996 | ||
1997 | if (!io_req || sc->device != lun_dev) { | |
1998 | spin_unlock_irqrestore(io_lock, flags); | |
1999 | continue; | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Found IO that is still pending with firmware and | |
2004 | * belongs to the LUN that we are resetting | |
2005 | */ | |
2006 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2007 | "Found IO in %s on lun\n", | |
2008 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
2009 | ||
a0bf1ca2 HP |
2010 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { |
2011 | spin_unlock_irqrestore(io_lock, flags); | |
2012 | continue; | |
2013 | } | |
2014 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && | |
14eb5d90 | 2015 | (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { |
a0bf1ca2 HP |
2016 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, |
2017 | "%s dev rst not pending sc 0x%p\n", __func__, | |
2018 | sc); | |
2019 | spin_unlock_irqrestore(io_lock, flags); | |
2020 | continue; | |
2021 | } | |
1259c5dc SB |
2022 | |
2023 | if (io_req->abts_done) | |
2024 | shost_printk(KERN_ERR, fnic->lport->host, | |
2025 | "%s: io_req->abts_done is set state is %s\n", | |
2026 | __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
a0bf1ca2 HP |
2027 | old_ioreq_state = CMD_STATE(sc); |
2028 | /* | |
2029 | * Any pending IO issued prior to reset is expected to be | |
2030 | * in abts pending state, if not we need to set | |
2031 | * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. | |
2032 | * When IO is completed, the IO will be handed over and | |
2033 | * handled in this function. | |
2034 | */ | |
2035 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
2036 | ||
a0bf1ca2 HP |
2037 | BUG_ON(io_req->abts_done); |
2038 | ||
2039 | abt_tag = tag; | |
2040 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { | |
2041 | abt_tag |= FNIC_TAG_DEV_RST; | |
2042 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
2043 | "%s: dev rst sc 0x%p\n", __func__, sc); | |
2044 | } | |
5df6d737 AJ |
2045 | |
2046 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
2047 | io_req->abts_done = &tm_done; | |
2048 | spin_unlock_irqrestore(io_lock, flags); | |
2049 | ||
2050 | /* Now queue the abort command to firmware */ | |
2051 | int_to_scsilun(sc->device->lun, &fc_lun); | |
5df6d737 | 2052 | |
a0bf1ca2 | 2053 | if (fnic_queue_abort_io_req(fnic, abt_tag, |
5df6d737 AJ |
2054 | FCPIO_ITMF_ABT_TASK_TERM, |
2055 | fc_lun.scsi_lun, 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->abts_done = NULL; | |
a0bf1ca2 HP |
2060 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) |
2061 | CMD_STATE(sc) = old_ioreq_state; | |
5df6d737 AJ |
2062 | spin_unlock_irqrestore(io_lock, flags); |
2063 | ret = 1; | |
2064 | goto clean_pending_aborts_end; | |
a0bf1ca2 HP |
2065 | } else { |
2066 | spin_lock_irqsave(io_lock, flags); | |
2067 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) | |
2068 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
2069 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 2070 | } |
14eb5d90 | 2071 | CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; |
5df6d737 AJ |
2072 | |
2073 | wait_for_completion_timeout(&tm_done, | |
2074 | msecs_to_jiffies | |
2075 | (fnic->config.ed_tov)); | |
2076 | ||
2077 | /* Recheck cmd state to check if it is now aborted */ | |
2078 | spin_lock_irqsave(io_lock, flags); | |
2079 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2080 | if (!io_req) { | |
2081 | spin_unlock_irqrestore(io_lock, flags); | |
14eb5d90 | 2082 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; |
a0bf1ca2 | 2083 | continue; |
5df6d737 AJ |
2084 | } |
2085 | ||
2086 | io_req->abts_done = NULL; | |
2087 | ||
2088 | /* if abort is still pending with fw, fail */ | |
1259c5dc | 2089 | if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { |
5df6d737 | 2090 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 | 2091 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; |
5df6d737 AJ |
2092 | ret = 1; |
2093 | goto clean_pending_aborts_end; | |
2094 | } | |
1259c5dc | 2095 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; |
5df6d737 AJ |
2096 | CMD_SP(sc) = NULL; |
2097 | spin_unlock_irqrestore(io_lock, flags); | |
2098 | ||
2099 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
2100 | mempool_free(io_req, fnic->io_req_pool); | |
2101 | } | |
2102 | ||
a0bf1ca2 HP |
2103 | schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); |
2104 | ||
2105 | /* walk again to check, if IOs are still pending in fw */ | |
2106 | if (fnic_is_abts_pending(fnic, lr_sc)) | |
2107 | ret = FAILED; | |
2108 | ||
5df6d737 AJ |
2109 | clean_pending_aborts_end: |
2110 | return ret; | |
2111 | } | |
2112 | ||
03298552 HP |
2113 | /** |
2114 | * fnic_scsi_host_start_tag | |
2115 | * Allocates tagid from host's tag list | |
2116 | **/ | |
2117 | static inline int | |
2118 | fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) | |
2119 | { | |
2120 | struct blk_queue_tag *bqt = fnic->lport->host->bqt; | |
2121 | int tag, ret = SCSI_NO_TAG; | |
2122 | ||
2123 | BUG_ON(!bqt); | |
2124 | if (!bqt) { | |
2125 | pr_err("Tags are not supported\n"); | |
2126 | goto end; | |
2127 | } | |
2128 | ||
2129 | do { | |
2130 | tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1); | |
2131 | if (tag >= bqt->max_depth) { | |
2132 | pr_err("Tag allocation failure\n"); | |
2133 | goto end; | |
2134 | } | |
2135 | } while (test_and_set_bit(tag, bqt->tag_map)); | |
2136 | ||
2137 | bqt->tag_index[tag] = sc->request; | |
2138 | sc->request->tag = tag; | |
2139 | sc->tag = tag; | |
2140 | if (!sc->request->special) | |
2141 | sc->request->special = sc; | |
2142 | ||
2143 | ret = tag; | |
2144 | ||
2145 | end: | |
2146 | return ret; | |
2147 | } | |
2148 | ||
2149 | /** | |
2150 | * fnic_scsi_host_end_tag | |
2151 | * frees tag allocated by fnic_scsi_host_start_tag. | |
2152 | **/ | |
2153 | static inline void | |
2154 | fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) | |
2155 | { | |
2156 | struct blk_queue_tag *bqt = fnic->lport->host->bqt; | |
2157 | int tag = sc->request->tag; | |
2158 | ||
2159 | if (tag == SCSI_NO_TAG) | |
2160 | return; | |
2161 | ||
2162 | BUG_ON(!bqt || !bqt->tag_index[tag]); | |
2163 | if (!bqt) | |
2164 | return; | |
2165 | ||
2166 | bqt->tag_index[tag] = NULL; | |
2167 | clear_bit(tag, bqt->tag_map); | |
2168 | ||
2169 | return; | |
2170 | } | |
2171 | ||
5df6d737 AJ |
2172 | /* |
2173 | * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN | |
2174 | * fail to get aborted. It calls driver's eh_device_reset with a SCSI command | |
2175 | * on the LUN. | |
2176 | */ | |
2177 | int fnic_device_reset(struct scsi_cmnd *sc) | |
2178 | { | |
2179 | struct fc_lport *lp; | |
2180 | struct fnic *fnic; | |
4d7007b4 | 2181 | struct fnic_io_req *io_req = NULL; |
5df6d737 AJ |
2182 | struct fc_rport *rport; |
2183 | int status; | |
2184 | int ret = FAILED; | |
2185 | spinlock_t *io_lock; | |
2186 | unsigned long flags; | |
14eb5d90 | 2187 | unsigned long start_time = 0; |
03298552 | 2188 | struct scsi_lun fc_lun; |
67125b02 HP |
2189 | struct fnic_stats *fnic_stats; |
2190 | struct reset_stats *reset_stats; | |
4d7007b4 | 2191 | int tag = 0; |
5df6d737 | 2192 | DECLARE_COMPLETION_ONSTACK(tm_done); |
03298552 | 2193 | int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ |
5df6d737 AJ |
2194 | |
2195 | /* Wait for rport to unblock */ | |
65d430fa | 2196 | fc_block_scsi_eh(sc); |
5df6d737 AJ |
2197 | |
2198 | /* Get local-port, check ready and link up */ | |
2199 | lp = shost_priv(sc->device->host); | |
2200 | ||
2201 | fnic = lport_priv(lp); | |
67125b02 HP |
2202 | fnic_stats = &fnic->fnic_stats; |
2203 | reset_stats = &fnic->fnic_stats.reset_stats; | |
2204 | ||
2205 | atomic64_inc(&reset_stats->device_resets); | |
5df6d737 | 2206 | |
0db6f435 RK |
2207 | rport = starget_to_rport(scsi_target(sc->device)); |
2208 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
03298552 HP |
2209 | "Device reset called FCID 0x%x, LUN 0x%x sc 0x%p\n", |
2210 | rport->port_id, sc->device->lun, sc); | |
5df6d737 AJ |
2211 | |
2212 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) | |
2213 | goto fnic_device_reset_end; | |
2214 | ||
2215 | /* Check if remote port up */ | |
67125b02 HP |
2216 | if (fc_remote_port_chkready(rport)) { |
2217 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); | |
5df6d737 | 2218 | goto fnic_device_reset_end; |
67125b02 | 2219 | } |
5df6d737 | 2220 | |
14eb5d90 | 2221 | CMD_FLAGS(sc) = FNIC_DEVICE_RESET; |
03298552 HP |
2222 | /* Allocate tag if not present */ |
2223 | ||
2224 | tag = sc->request->tag; | |
2225 | if (unlikely(tag < 0)) { | |
2226 | tag = fnic_scsi_host_start_tag(fnic, sc); | |
2227 | if (unlikely(tag == SCSI_NO_TAG)) | |
2228 | goto fnic_device_reset_end; | |
2229 | tag_gen_flag = 1; | |
2230 | } | |
5df6d737 AJ |
2231 | io_lock = fnic_io_lock_hash(fnic, sc); |
2232 | spin_lock_irqsave(io_lock, flags); | |
2233 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2234 | ||
2235 | /* | |
2236 | * If there is a io_req attached to this command, then use it, | |
2237 | * else allocate a new one. | |
2238 | */ | |
2239 | if (!io_req) { | |
2240 | io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); | |
2241 | if (!io_req) { | |
2242 | spin_unlock_irqrestore(io_lock, flags); | |
2243 | goto fnic_device_reset_end; | |
2244 | } | |
2245 | memset(io_req, 0, sizeof(*io_req)); | |
2246 | io_req->port_id = rport->port_id; | |
2247 | CMD_SP(sc) = (char *)io_req; | |
2248 | } | |
2249 | io_req->dr_done = &tm_done; | |
2250 | CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; | |
2251 | CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; | |
2252 | spin_unlock_irqrestore(io_lock, flags); | |
2253 | ||
03298552 | 2254 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); |
5df6d737 AJ |
2255 | |
2256 | /* | |
2257 | * issue the device reset, if enqueue failed, clean up the ioreq | |
2258 | * and break assoc with scsi cmd | |
2259 | */ | |
2260 | if (fnic_queue_dr_io_req(fnic, sc, io_req)) { | |
2261 | spin_lock_irqsave(io_lock, flags); | |
2262 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2263 | if (io_req) | |
2264 | io_req->dr_done = NULL; | |
2265 | goto fnic_device_reset_clean; | |
2266 | } | |
03298552 | 2267 | spin_lock_irqsave(io_lock, flags); |
14eb5d90 | 2268 | CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; |
03298552 | 2269 | spin_unlock_irqrestore(io_lock, flags); |
5df6d737 AJ |
2270 | |
2271 | /* | |
2272 | * Wait on the local completion for LUN reset. The io_req may be | |
2273 | * freed while we wait since we hold no lock. | |
2274 | */ | |
2275 | wait_for_completion_timeout(&tm_done, | |
2276 | msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); | |
2277 | ||
2278 | spin_lock_irqsave(io_lock, flags); | |
2279 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2280 | if (!io_req) { | |
2281 | spin_unlock_irqrestore(io_lock, flags); | |
03298552 HP |
2282 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
2283 | "io_req is null tag 0x%x sc 0x%p\n", tag, sc); | |
5df6d737 AJ |
2284 | goto fnic_device_reset_end; |
2285 | } | |
2286 | io_req->dr_done = NULL; | |
2287 | ||
2288 | status = CMD_LR_STATUS(sc); | |
5df6d737 AJ |
2289 | |
2290 | /* | |
2291 | * If lun reset not completed, bail out with failed. io_req | |
2292 | * gets cleaned up during higher levels of EH | |
2293 | */ | |
2294 | if (status == FCPIO_INVALID_CODE) { | |
67125b02 | 2295 | atomic64_inc(&reset_stats->device_reset_timeouts); |
5df6d737 AJ |
2296 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
2297 | "Device reset timed out\n"); | |
03298552 HP |
2298 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; |
2299 | spin_unlock_irqrestore(io_lock, flags); | |
2300 | int_to_scsilun(sc->device->lun, &fc_lun); | |
2301 | /* | |
1259c5dc SB |
2302 | * Issue abort and terminate on device reset request. |
2303 | * If q'ing of terminate fails, retry it after a delay. | |
03298552 HP |
2304 | */ |
2305 | while (1) { | |
2306 | spin_lock_irqsave(io_lock, flags); | |
2307 | if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { | |
2308 | spin_unlock_irqrestore(io_lock, flags); | |
2309 | break; | |
2310 | } | |
2311 | spin_unlock_irqrestore(io_lock, flags); | |
2312 | if (fnic_queue_abort_io_req(fnic, | |
2313 | tag | FNIC_TAG_DEV_RST, | |
2314 | FCPIO_ITMF_ABT_TASK_TERM, | |
2315 | fc_lun.scsi_lun, io_req)) { | |
2316 | wait_for_completion_timeout(&tm_done, | |
2317 | msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); | |
2318 | } else { | |
2319 | spin_lock_irqsave(io_lock, flags); | |
2320 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
2321 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
2322 | io_req->abts_done = &tm_done; | |
2323 | spin_unlock_irqrestore(io_lock, flags); | |
2324 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2325 | "Abort and terminate issued on Device reset " | |
2326 | "tag 0x%x sc 0x%p\n", tag, sc); | |
2327 | break; | |
2328 | } | |
2329 | } | |
2330 | while (1) { | |
2331 | spin_lock_irqsave(io_lock, flags); | |
2332 | if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { | |
2333 | spin_unlock_irqrestore(io_lock, flags); | |
2334 | wait_for_completion_timeout(&tm_done, | |
2335 | msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); | |
2336 | break; | |
2337 | } else { | |
2338 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2339 | io_req->abts_done = NULL; | |
2340 | goto fnic_device_reset_clean; | |
2341 | } | |
2342 | } | |
2343 | } else { | |
2344 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 AJ |
2345 | } |
2346 | ||
2347 | /* Completed, but not successful, clean up the io_req, return fail */ | |
2348 | if (status != FCPIO_SUCCESS) { | |
2349 | spin_lock_irqsave(io_lock, flags); | |
2350 | FNIC_SCSI_DBG(KERN_DEBUG, | |
2351 | fnic->lport->host, | |
2352 | "Device reset completed - failed\n"); | |
2353 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2354 | goto fnic_device_reset_clean; | |
2355 | } | |
2356 | ||
2357 | /* | |
2358 | * Clean up any aborts on this lun that have still not | |
2359 | * completed. If any of these fail, then LUN reset fails. | |
2360 | * clean_pending_aborts cleans all cmds on this lun except | |
2361 | * the lun reset cmd. If all cmds get cleaned, the lun reset | |
2362 | * succeeds | |
2363 | */ | |
2364 | if (fnic_clean_pending_aborts(fnic, sc)) { | |
2365 | spin_lock_irqsave(io_lock, flags); | |
2366 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2367 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2368 | "Device reset failed" | |
2369 | " since could not abort all IOs\n"); | |
2370 | goto fnic_device_reset_clean; | |
2371 | } | |
2372 | ||
2373 | /* Clean lun reset command */ | |
2374 | spin_lock_irqsave(io_lock, flags); | |
2375 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2376 | if (io_req) | |
2377 | /* Completed, and successful */ | |
2378 | ret = SUCCESS; | |
2379 | ||
2380 | fnic_device_reset_clean: | |
2381 | if (io_req) | |
2382 | CMD_SP(sc) = NULL; | |
2383 | ||
2384 | spin_unlock_irqrestore(io_lock, flags); | |
2385 | ||
2386 | if (io_req) { | |
14eb5d90 | 2387 | start_time = io_req->start_time; |
5df6d737 AJ |
2388 | fnic_release_ioreq_buf(fnic, io_req, sc); |
2389 | mempool_free(io_req, fnic->io_req_pool); | |
2390 | } | |
2391 | ||
2392 | fnic_device_reset_end: | |
4d7007b4 HP |
2393 | FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, |
2394 | sc->request->tag, sc, | |
2395 | jiffies_to_msecs(jiffies - start_time), | |
2396 | 0, ((u64)sc->cmnd[0] << 32 | | |
2397 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
2398 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
2399 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
2400 | ||
03298552 HP |
2401 | /* free tag if it is allocated */ |
2402 | if (unlikely(tag_gen_flag)) | |
2403 | fnic_scsi_host_end_tag(fnic, sc); | |
2404 | ||
5df6d737 AJ |
2405 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
2406 | "Returning from device reset %s\n", | |
2407 | (ret == SUCCESS) ? | |
2408 | "SUCCESS" : "FAILED"); | |
67125b02 HP |
2409 | |
2410 | if (ret == FAILED) | |
2411 | atomic64_inc(&reset_stats->device_reset_failures); | |
2412 | ||
5df6d737 AJ |
2413 | return ret; |
2414 | } | |
2415 | ||
2416 | /* Clean up all IOs, clean up libFC local port */ | |
2417 | int fnic_reset(struct Scsi_Host *shost) | |
2418 | { | |
2419 | struct fc_lport *lp; | |
2420 | struct fnic *fnic; | |
441fbd25 | 2421 | int ret = 0; |
67125b02 | 2422 | struct reset_stats *reset_stats; |
5df6d737 AJ |
2423 | |
2424 | lp = shost_priv(shost); | |
2425 | fnic = lport_priv(lp); | |
67125b02 | 2426 | reset_stats = &fnic->fnic_stats.reset_stats; |
5df6d737 AJ |
2427 | |
2428 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2429 | "fnic_reset called\n"); | |
2430 | ||
67125b02 HP |
2431 | atomic64_inc(&reset_stats->fnic_resets); |
2432 | ||
5df6d737 AJ |
2433 | /* |
2434 | * Reset local port, this will clean up libFC exchanges, | |
2435 | * reset remote port sessions, and if link is up, begin flogi | |
2436 | */ | |
441fbd25 | 2437 | ret = lp->tt.lport_reset(lp); |
5df6d737 AJ |
2438 | |
2439 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2440 | "Returning from fnic reset %s\n", | |
441fbd25 | 2441 | (ret == 0) ? |
5df6d737 AJ |
2442 | "SUCCESS" : "FAILED"); |
2443 | ||
67125b02 HP |
2444 | if (ret == 0) |
2445 | atomic64_inc(&reset_stats->fnic_reset_completions); | |
2446 | else | |
2447 | atomic64_inc(&reset_stats->fnic_reset_failures); | |
2448 | ||
5df6d737 AJ |
2449 | return ret; |
2450 | } | |
2451 | ||
2452 | /* | |
2453 | * SCSI Error handling calls driver's eh_host_reset if all prior | |
2454 | * error handling levels return FAILED. If host reset completes | |
2455 | * successfully, and if link is up, then Fabric login begins. | |
2456 | * | |
2457 | * Host Reset is the highest level of error recovery. If this fails, then | |
2458 | * host is offlined by SCSI. | |
2459 | * | |
2460 | */ | |
2461 | int fnic_host_reset(struct scsi_cmnd *sc) | |
2462 | { | |
2463 | int ret; | |
2464 | unsigned long wait_host_tmo; | |
2465 | struct Scsi_Host *shost = sc->device->host; | |
2466 | struct fc_lport *lp = shost_priv(shost); | |
2467 | ||
2468 | /* | |
2469 | * If fnic_reset is successful, wait for fabric login to complete | |
2470 | * scsi-ml tries to send a TUR to every device if host reset is | |
2471 | * successful, so before returning to scsi, fabric should be up | |
2472 | */ | |
441fbd25 | 2473 | ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; |
5df6d737 AJ |
2474 | if (ret == SUCCESS) { |
2475 | wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; | |
2476 | ret = FAILED; | |
2477 | while (time_before(jiffies, wait_host_tmo)) { | |
2478 | if ((lp->state == LPORT_ST_READY) && | |
2479 | (lp->link_up)) { | |
2480 | ret = SUCCESS; | |
2481 | break; | |
2482 | } | |
2483 | ssleep(1); | |
2484 | } | |
2485 | } | |
2486 | ||
2487 | return ret; | |
2488 | } | |
2489 | ||
2490 | /* | |
2491 | * This fxn is called from libFC when host is removed | |
2492 | */ | |
2493 | void fnic_scsi_abort_io(struct fc_lport *lp) | |
2494 | { | |
2495 | int err = 0; | |
2496 | unsigned long flags; | |
2497 | enum fnic_state old_state; | |
2498 | struct fnic *fnic = lport_priv(lp); | |
2499 | DECLARE_COMPLETION_ONSTACK(remove_wait); | |
2500 | ||
2501 | /* Issue firmware reset for fnic, wait for reset to complete */ | |
03298552 | 2502 | retry_fw_reset: |
5df6d737 | 2503 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
03298552 HP |
2504 | if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { |
2505 | /* fw reset is in progress, poll for its completion */ | |
2506 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2507 | schedule_timeout(msecs_to_jiffies(100)); | |
2508 | goto retry_fw_reset; | |
2509 | } | |
2510 | ||
5df6d737 AJ |
2511 | fnic->remove_wait = &remove_wait; |
2512 | old_state = fnic->state; | |
2513 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
78112e55 | 2514 | fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); |
5df6d737 AJ |
2515 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
2516 | ||
2517 | err = fnic_fw_reset_handler(fnic); | |
2518 | if (err) { | |
2519 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
2520 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) | |
2521 | fnic->state = old_state; | |
2522 | fnic->remove_wait = NULL; | |
2523 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2524 | return; | |
2525 | } | |
2526 | ||
2527 | /* Wait for firmware reset to complete */ | |
2528 | wait_for_completion_timeout(&remove_wait, | |
2529 | msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); | |
2530 | ||
2531 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
2532 | fnic->remove_wait = NULL; | |
2533 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2534 | "fnic_scsi_abort_io %s\n", | |
2535 | (fnic->state == FNIC_IN_ETH_MODE) ? | |
2536 | "SUCCESS" : "FAILED"); | |
2537 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2538 | ||
2539 | } | |
2540 | ||
2541 | /* | |
2542 | * This fxn called from libFC to clean up driver IO state on link down | |
2543 | */ | |
2544 | void fnic_scsi_cleanup(struct fc_lport *lp) | |
2545 | { | |
2546 | unsigned long flags; | |
2547 | enum fnic_state old_state; | |
2548 | struct fnic *fnic = lport_priv(lp); | |
2549 | ||
2550 | /* issue fw reset */ | |
03298552 | 2551 | retry_fw_reset: |
5df6d737 | 2552 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
03298552 HP |
2553 | if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { |
2554 | /* fw reset is in progress, poll for its completion */ | |
2555 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2556 | schedule_timeout(msecs_to_jiffies(100)); | |
2557 | goto retry_fw_reset; | |
2558 | } | |
5df6d737 AJ |
2559 | old_state = fnic->state; |
2560 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
78112e55 | 2561 | fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); |
5df6d737 AJ |
2562 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
2563 | ||
2564 | if (fnic_fw_reset_handler(fnic)) { | |
2565 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
2566 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) | |
2567 | fnic->state = old_state; | |
2568 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2569 | } | |
2570 | ||
2571 | } | |
2572 | ||
2573 | void fnic_empty_scsi_cleanup(struct fc_lport *lp) | |
2574 | { | |
2575 | } | |
2576 | ||
2577 | void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) | |
2578 | { | |
2579 | struct fnic *fnic = lport_priv(lp); | |
2580 | ||
2581 | /* Non-zero sid, nothing to do */ | |
2582 | if (sid) | |
2583 | goto call_fc_exch_mgr_reset; | |
2584 | ||
2585 | if (did) { | |
2586 | fnic_rport_exch_reset(fnic, did); | |
2587 | goto call_fc_exch_mgr_reset; | |
2588 | } | |
2589 | ||
2590 | /* | |
2591 | * sid = 0, did = 0 | |
2592 | * link down or device being removed | |
2593 | */ | |
2594 | if (!fnic->in_remove) | |
2595 | fnic_scsi_cleanup(lp); | |
2596 | else | |
2597 | fnic_scsi_abort_io(lp); | |
2598 | ||
2599 | /* call libFC exch mgr reset to reset its exchanges */ | |
2600 | call_fc_exch_mgr_reset: | |
2601 | fc_exch_mgr_reset(lp, sid, did); | |
2602 | ||
2603 | } | |
a0bf1ca2 HP |
2604 | |
2605 | /* | |
2606 | * fnic_is_abts_pending() is a helper function that | |
2607 | * walks through tag map to check if there is any IOs pending,if there is one, | |
2608 | * then it returns 1 (true), otherwise 0 (false) | |
2609 | * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, | |
2610 | * otherwise, it checks for all IOs. | |
2611 | */ | |
2612 | int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) | |
2613 | { | |
2614 | int tag; | |
2615 | struct fnic_io_req *io_req; | |
2616 | spinlock_t *io_lock; | |
2617 | unsigned long flags; | |
2618 | int ret = 0; | |
2619 | struct scsi_cmnd *sc; | |
2620 | struct scsi_device *lun_dev = NULL; | |
2621 | ||
2622 | if (lr_sc) | |
2623 | lun_dev = lr_sc->device; | |
2624 | ||
2625 | /* walk again to check, if IOs are still pending in fw */ | |
fc85799e | 2626 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
a0bf1ca2 HP |
2627 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
2628 | /* | |
2629 | * ignore this lun reset cmd or cmds that do not belong to | |
2630 | * this lun | |
2631 | */ | |
2632 | if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) | |
2633 | continue; | |
2634 | ||
2635 | io_lock = fnic_io_lock_hash(fnic, sc); | |
2636 | spin_lock_irqsave(io_lock, flags); | |
2637 | ||
2638 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2639 | ||
2640 | if (!io_req || sc->device != lun_dev) { | |
2641 | spin_unlock_irqrestore(io_lock, flags); | |
2642 | continue; | |
2643 | } | |
2644 | ||
2645 | /* | |
2646 | * Found IO that is still pending with firmware and | |
2647 | * belongs to the LUN that we are resetting | |
2648 | */ | |
2649 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
2650 | "Found IO in %s on lun\n", | |
2651 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
2652 | ||
5d65f918 | 2653 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) |
a0bf1ca2 | 2654 | ret = 1; |
5d65f918 | 2655 | spin_unlock_irqrestore(io_lock, flags); |
a0bf1ca2 HP |
2656 | } |
2657 | ||
2658 | return ret; | |
2659 | } |