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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 | unsigned int i; |
329 | unsigned long intr_flags; | |
330 | int flags; | |
331 | u8 exch_flags; | |
332 | struct scsi_lun fc_lun; | |
5df6d737 AJ |
333 | |
334 | if (sg_count) { | |
5df6d737 AJ |
335 | /* For each SGE, create a device desc entry */ |
336 | desc = io_req->sgl_list; | |
337 | for_each_sg(scsi_sglist(sc), sg, sg_count, i) { | |
338 | desc->addr = cpu_to_le64(sg_dma_address(sg)); | |
339 | desc->len = cpu_to_le32(sg_dma_len(sg)); | |
340 | desc->_resvd = 0; | |
341 | desc++; | |
342 | } | |
343 | ||
344 | io_req->sgl_list_pa = pci_map_single | |
345 | (fnic->pdev, | |
346 | io_req->sgl_list, | |
347 | sizeof(io_req->sgl_list[0]) * sg_count, | |
348 | PCI_DMA_TODEVICE); | |
349 | } | |
350 | ||
351 | io_req->sense_buf_pa = pci_map_single(fnic->pdev, | |
352 | sc->sense_buffer, | |
353 | SCSI_SENSE_BUFFERSIZE, | |
354 | PCI_DMA_FROMDEVICE); | |
355 | ||
356 | int_to_scsilun(sc->device->lun, &fc_lun); | |
357 | ||
5df6d737 AJ |
358 | /* Enqueue the descriptor in the Copy WQ */ |
359 | spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); | |
360 | ||
361 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
362 | free_wq_copy_descs(fnic, wq); | |
363 | ||
364 | if (unlikely(!vnic_wq_copy_desc_avail(wq))) { | |
365 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
14eb5d90 HP |
366 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, |
367 | "fnic_queue_wq_copy_desc failure - no descriptors\n"); | |
67125b02 | 368 | atomic64_inc(&misc_stats->io_cpwq_alloc_failures); |
5df6d737 AJ |
369 | return SCSI_MLQUEUE_HOST_BUSY; |
370 | } | |
371 | ||
372 | flags = 0; | |
373 | if (sc->sc_data_direction == DMA_FROM_DEVICE) | |
374 | flags = FCPIO_ICMND_RDDATA; | |
375 | else if (sc->sc_data_direction == DMA_TO_DEVICE) | |
376 | flags = FCPIO_ICMND_WRDATA; | |
377 | ||
378 | exch_flags = 0; | |
379 | if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && | |
380 | (rp->flags & FC_RP_FLAGS_RETRY)) | |
381 | exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; | |
382 | ||
383 | fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, | |
384 | 0, exch_flags, io_req->sgl_cnt, | |
385 | SCSI_SENSE_BUFFERSIZE, | |
386 | io_req->sgl_list_pa, | |
387 | io_req->sense_buf_pa, | |
388 | 0, /* scsi cmd ref, always 0 */ | |
50668633 CH |
389 | FCPIO_ICMND_PTA_SIMPLE, |
390 | /* scsi pri and tag */ | |
5df6d737 | 391 | flags, /* command flags */ |
4b53662b AJ |
392 | sc->cmnd, sc->cmd_len, |
393 | scsi_bufflen(sc), | |
5df6d737 AJ |
394 | fc_lun.scsi_lun, io_req->port_id, |
395 | rport->maxframe_size, rp->r_a_tov, | |
396 | rp->e_d_tov); | |
397 | ||
67125b02 HP |
398 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
399 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
400 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
401 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
402 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
403 | ||
5df6d737 AJ |
404 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); |
405 | return 0; | |
406 | } | |
407 | ||
408 | /* | |
409 | * fnic_queuecommand | |
410 | * Routine to send a scsi cdb | |
411 | * Called with host_lock held and interrupts disabled. | |
412 | */ | |
f281233d | 413 | static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) |
5df6d737 | 414 | { |
03298552 | 415 | struct fc_lport *lp = shost_priv(sc->device->host); |
5df6d737 | 416 | struct fc_rport *rport; |
4d7007b4 | 417 | struct fnic_io_req *io_req = NULL; |
03298552 | 418 | struct fnic *fnic = lport_priv(lp); |
67125b02 | 419 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 AJ |
420 | struct vnic_wq_copy *wq; |
421 | int ret; | |
4d7007b4 HP |
422 | u64 cmd_trace; |
423 | int sg_count = 0; | |
41df7b02 | 424 | unsigned long flags = 0; |
5df6d737 | 425 | unsigned long ptr; |
35061e21 | 426 | struct fc_rport_priv *rdata; |
41df7b02 | 427 | spinlock_t *io_lock = NULL; |
5df6d737 | 428 | |
03298552 HP |
429 | if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) |
430 | return SCSI_MLQUEUE_HOST_BUSY; | |
431 | ||
5df6d737 AJ |
432 | rport = starget_to_rport(scsi_target(sc->device)); |
433 | ret = fc_remote_port_chkready(rport); | |
434 | if (ret) { | |
67125b02 | 435 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); |
5df6d737 AJ |
436 | sc->result = ret; |
437 | done(sc); | |
438 | return 0; | |
439 | } | |
440 | ||
35061e21 HS |
441 | rdata = lp->tt.rport_lookup(lp, rport->port_id); |
442 | if (!rdata || (rdata->rp_state == RPORT_ST_DELETE)) { | |
443 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
444 | "returning IO as rport is removed\n"); | |
445 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); | |
446 | sc->result = DID_NO_CONNECT; | |
447 | done(sc); | |
448 | return 0; | |
449 | } | |
450 | ||
5df6d737 AJ |
451 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) |
452 | return SCSI_MLQUEUE_HOST_BUSY; | |
453 | ||
03298552 HP |
454 | atomic_inc(&fnic->in_flight); |
455 | ||
5df6d737 AJ |
456 | /* |
457 | * Release host lock, use driver resource specific locks from here. | |
458 | * Don't re-enable interrupts in case they were disabled prior to the | |
459 | * caller disabling them. | |
460 | */ | |
461 | spin_unlock(lp->host->host_lock); | |
14eb5d90 HP |
462 | CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; |
463 | CMD_FLAGS(sc) = FNIC_NO_FLAGS; | |
5df6d737 AJ |
464 | |
465 | /* Get a new io_req for this SCSI IO */ | |
5df6d737 AJ |
466 | io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); |
467 | if (!io_req) { | |
67125b02 | 468 | atomic64_inc(&fnic_stats->io_stats.alloc_failures); |
5df6d737 AJ |
469 | ret = SCSI_MLQUEUE_HOST_BUSY; |
470 | goto out; | |
471 | } | |
472 | memset(io_req, 0, sizeof(*io_req)); | |
473 | ||
474 | /* Map the data buffer */ | |
475 | sg_count = scsi_dma_map(sc); | |
476 | if (sg_count < 0) { | |
4d7007b4 HP |
477 | FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, |
478 | sc->request->tag, sc, 0, sc->cmnd[0], | |
479 | sg_count, CMD_STATE(sc)); | |
5df6d737 AJ |
480 | mempool_free(io_req, fnic->io_req_pool); |
481 | goto out; | |
482 | } | |
483 | ||
484 | /* Determine the type of scatter/gather list we need */ | |
485 | io_req->sgl_cnt = sg_count; | |
486 | io_req->sgl_type = FNIC_SGL_CACHE_DFLT; | |
487 | if (sg_count > FNIC_DFLT_SG_DESC_CNT) | |
488 | io_req->sgl_type = FNIC_SGL_CACHE_MAX; | |
489 | ||
490 | if (sg_count) { | |
491 | io_req->sgl_list = | |
492 | mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], | |
0c79c742 | 493 | GFP_ATOMIC); |
5df6d737 | 494 | if (!io_req->sgl_list) { |
67125b02 | 495 | atomic64_inc(&fnic_stats->io_stats.alloc_failures); |
5df6d737 AJ |
496 | ret = SCSI_MLQUEUE_HOST_BUSY; |
497 | scsi_dma_unmap(sc); | |
498 | mempool_free(io_req, fnic->io_req_pool); | |
499 | goto out; | |
500 | } | |
501 | ||
502 | /* Cache sgl list allocated address before alignment */ | |
503 | io_req->sgl_list_alloc = io_req->sgl_list; | |
504 | ptr = (unsigned long) io_req->sgl_list; | |
505 | if (ptr % FNIC_SG_DESC_ALIGN) { | |
506 | io_req->sgl_list = (struct host_sg_desc *) | |
507 | (((unsigned long) ptr | |
508 | + FNIC_SG_DESC_ALIGN - 1) | |
509 | & ~(FNIC_SG_DESC_ALIGN - 1)); | |
510 | } | |
511 | } | |
512 | ||
41df7b02 HS |
513 | /* |
514 | * Will acquire lock defore setting to IO initialized. | |
515 | */ | |
516 | ||
517 | io_lock = fnic_io_lock_hash(fnic, sc); | |
518 | spin_lock_irqsave(io_lock, flags); | |
519 | ||
5df6d737 AJ |
520 | /* initialize rest of io_req */ |
521 | io_req->port_id = rport->port_id; | |
14eb5d90 | 522 | io_req->start_time = jiffies; |
5df6d737 AJ |
523 | CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; |
524 | CMD_SP(sc) = (char *)io_req; | |
14eb5d90 | 525 | CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; |
5df6d737 AJ |
526 | sc->scsi_done = done; |
527 | ||
528 | /* create copy wq desc and enqueue it */ | |
529 | wq = &fnic->wq_copy[0]; | |
530 | ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); | |
531 | if (ret) { | |
532 | /* | |
533 | * In case another thread cancelled the request, | |
534 | * refetch the pointer under the lock. | |
535 | */ | |
4d7007b4 HP |
536 | FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, |
537 | sc->request->tag, sc, 0, 0, 0, | |
538 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
5df6d737 AJ |
539 | io_req = (struct fnic_io_req *)CMD_SP(sc); |
540 | CMD_SP(sc) = NULL; | |
541 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
542 | spin_unlock_irqrestore(io_lock, flags); | |
543 | if (io_req) { | |
544 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
545 | mempool_free(io_req, fnic->io_req_pool); | |
546 | } | |
41df7b02 HS |
547 | atomic_dec(&fnic->in_flight); |
548 | /* acquire host lock before returning to SCSI */ | |
549 | spin_lock(lp->host->host_lock); | |
550 | return ret; | |
14eb5d90 | 551 | } else { |
67125b02 HP |
552 | atomic64_inc(&fnic_stats->io_stats.active_ios); |
553 | atomic64_inc(&fnic_stats->io_stats.num_ios); | |
554 | if (atomic64_read(&fnic_stats->io_stats.active_ios) > | |
555 | atomic64_read(&fnic_stats->io_stats.max_active_ios)) | |
556 | atomic64_set(&fnic_stats->io_stats.max_active_ios, | |
557 | atomic64_read(&fnic_stats->io_stats.active_ios)); | |
558 | ||
14eb5d90 HP |
559 | /* REVISIT: Use per IO lock in the final code */ |
560 | CMD_FLAGS(sc) |= FNIC_IO_ISSUED; | |
5df6d737 AJ |
561 | } |
562 | out: | |
4d7007b4 HP |
563 | cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | |
564 | (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | | |
565 | (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | | |
566 | sc->cmnd[5]); | |
567 | ||
568 | FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, | |
569 | sc->request->tag, sc, io_req, | |
570 | sg_count, cmd_trace, | |
571 | (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); | |
41df7b02 HS |
572 | |
573 | /* if only we issued IO, will we have the io lock */ | |
574 | if (CMD_FLAGS(sc) & FNIC_IO_INITIALIZED) | |
575 | spin_unlock_irqrestore(io_lock, flags); | |
576 | ||
03298552 | 577 | atomic_dec(&fnic->in_flight); |
5df6d737 AJ |
578 | /* acquire host lock before returning to SCSI */ |
579 | spin_lock(lp->host->host_lock); | |
580 | return ret; | |
581 | } | |
582 | ||
f281233d JG |
583 | DEF_SCSI_QCMD(fnic_queuecommand) |
584 | ||
5df6d737 AJ |
585 | /* |
586 | * fnic_fcpio_fw_reset_cmpl_handler | |
587 | * Routine to handle fw reset completion | |
588 | */ | |
589 | static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, | |
590 | struct fcpio_fw_req *desc) | |
591 | { | |
592 | u8 type; | |
593 | u8 hdr_status; | |
594 | struct fcpio_tag tag; | |
595 | int ret = 0; | |
5df6d737 | 596 | unsigned long flags; |
67125b02 | 597 | struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; |
5df6d737 AJ |
598 | |
599 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
600 | ||
67125b02 HP |
601 | atomic64_inc(&reset_stats->fw_reset_completions); |
602 | ||
5df6d737 AJ |
603 | /* Clean up all outstanding io requests */ |
604 | fnic_cleanup_io(fnic, SCSI_NO_TAG); | |
605 | ||
67125b02 HP |
606 | atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); |
607 | atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); | |
608 | ||
5df6d737 AJ |
609 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
610 | ||
5df6d737 AJ |
611 | /* fnic should be in FC_TRANS_ETH_MODE */ |
612 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { | |
613 | /* Check status of reset completion */ | |
614 | if (!hdr_status) { | |
615 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
616 | "reset cmpl success\n"); | |
617 | /* Ready to send flogi out */ | |
618 | fnic->state = FNIC_IN_ETH_MODE; | |
619 | } else { | |
620 | FNIC_SCSI_DBG(KERN_DEBUG, | |
621 | fnic->lport->host, | |
622 | "fnic fw_reset : failed %s\n", | |
623 | fnic_fcpio_status_to_str(hdr_status)); | |
624 | ||
625 | /* | |
626 | * Unable to change to eth mode, cannot send out flogi | |
627 | * Change state to fc mode, so that subsequent Flogi | |
628 | * requests from libFC will cause more attempts to | |
629 | * reset the firmware. Free the cached flogi | |
630 | */ | |
631 | fnic->state = FNIC_IN_FC_MODE; | |
67125b02 | 632 | atomic64_inc(&reset_stats->fw_reset_failures); |
5df6d737 AJ |
633 | ret = -1; |
634 | } | |
635 | } else { | |
636 | FNIC_SCSI_DBG(KERN_DEBUG, | |
637 | fnic->lport->host, | |
638 | "Unexpected state %s while processing" | |
639 | " reset cmpl\n", fnic_state_to_str(fnic->state)); | |
67125b02 | 640 | atomic64_inc(&reset_stats->fw_reset_failures); |
5df6d737 AJ |
641 | ret = -1; |
642 | } | |
643 | ||
644 | /* Thread removing device blocks till firmware reset is complete */ | |
645 | if (fnic->remove_wait) | |
646 | complete(fnic->remove_wait); | |
647 | ||
648 | /* | |
649 | * If fnic is being removed, or fw reset failed | |
650 | * free the flogi frame. Else, send it out | |
651 | */ | |
652 | if (fnic->remove_wait || ret) { | |
5df6d737 | 653 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
78112e55 | 654 | skb_queue_purge(&fnic->tx_queue); |
5df6d737 AJ |
655 | goto reset_cmpl_handler_end; |
656 | } | |
657 | ||
658 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
659 | ||
78112e55 | 660 | fnic_flush_tx(fnic); |
5df6d737 AJ |
661 | |
662 | reset_cmpl_handler_end: | |
03298552 HP |
663 | fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); |
664 | ||
5df6d737 AJ |
665 | return ret; |
666 | } | |
667 | ||
668 | /* | |
669 | * fnic_fcpio_flogi_reg_cmpl_handler | |
670 | * Routine to handle flogi register completion | |
671 | */ | |
672 | static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, | |
673 | struct fcpio_fw_req *desc) | |
674 | { | |
675 | u8 type; | |
676 | u8 hdr_status; | |
677 | struct fcpio_tag tag; | |
678 | int ret = 0; | |
5df6d737 | 679 | unsigned long flags; |
5df6d737 AJ |
680 | |
681 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
682 | ||
683 | /* Update fnic state based on status of flogi reg completion */ | |
684 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
685 | ||
5df6d737 AJ |
686 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { |
687 | ||
688 | /* Check flogi registration completion status */ | |
689 | if (!hdr_status) { | |
690 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
691 | "flog reg succeeded\n"); | |
692 | fnic->state = FNIC_IN_FC_MODE; | |
693 | } else { | |
694 | FNIC_SCSI_DBG(KERN_DEBUG, | |
695 | fnic->lport->host, | |
696 | "fnic flogi reg :failed %s\n", | |
697 | fnic_fcpio_status_to_str(hdr_status)); | |
698 | fnic->state = FNIC_IN_ETH_MODE; | |
699 | ret = -1; | |
700 | } | |
701 | } else { | |
702 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
703 | "Unexpected fnic state %s while" | |
704 | " processing flogi reg completion\n", | |
705 | fnic_state_to_str(fnic->state)); | |
706 | ret = -1; | |
707 | } | |
708 | ||
78112e55 | 709 | if (!ret) { |
5df6d737 AJ |
710 | if (fnic->stop_rx_link_events) { |
711 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
712 | goto reg_cmpl_handler_end; | |
713 | } | |
5df6d737 AJ |
714 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
715 | ||
78112e55 | 716 | fnic_flush_tx(fnic); |
5df6d737 | 717 | queue_work(fnic_event_queue, &fnic->frame_work); |
5df6d737 AJ |
718 | } else { |
719 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
5df6d737 AJ |
720 | } |
721 | ||
722 | reg_cmpl_handler_end: | |
723 | return ret; | |
724 | } | |
725 | ||
726 | static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, | |
727 | u16 request_out) | |
728 | { | |
729 | if (wq->to_clean_index <= wq->to_use_index) { | |
730 | /* out of range, stale request_out index */ | |
731 | if (request_out < wq->to_clean_index || | |
732 | request_out >= wq->to_use_index) | |
733 | return 0; | |
734 | } else { | |
735 | /* out of range, stale request_out index */ | |
736 | if (request_out < wq->to_clean_index && | |
737 | request_out >= wq->to_use_index) | |
738 | return 0; | |
739 | } | |
740 | /* request_out index is in range */ | |
741 | return 1; | |
742 | } | |
743 | ||
744 | ||
745 | /* | |
746 | * Mark that ack received and store the Ack index. If there are multiple | |
747 | * acks received before Tx thread cleans it up, the latest value will be | |
748 | * used which is correct behavior. This state should be in the copy Wq | |
749 | * instead of in the fnic | |
750 | */ | |
751 | static inline void fnic_fcpio_ack_handler(struct fnic *fnic, | |
752 | unsigned int cq_index, | |
753 | struct fcpio_fw_req *desc) | |
754 | { | |
755 | struct vnic_wq_copy *wq; | |
756 | u16 request_out = desc->u.ack.request_out; | |
757 | unsigned long flags; | |
4d7007b4 | 758 | u64 *ox_id_tag = (u64 *)(void *)desc; |
5df6d737 AJ |
759 | |
760 | /* mark the ack state */ | |
761 | wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; | |
762 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); | |
763 | ||
67125b02 | 764 | fnic->fnic_stats.misc_stats.last_ack_time = jiffies; |
5df6d737 AJ |
765 | if (is_ack_index_in_range(wq, request_out)) { |
766 | fnic->fw_ack_index[0] = request_out; | |
767 | fnic->fw_ack_recd[0] = 1; | |
67125b02 HP |
768 | } else |
769 | atomic64_inc( | |
770 | &fnic->fnic_stats.misc_stats.ack_index_out_of_range); | |
771 | ||
5df6d737 | 772 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); |
4d7007b4 HP |
773 | FNIC_TRACE(fnic_fcpio_ack_handler, |
774 | fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], | |
775 | ox_id_tag[4], ox_id_tag[5]); | |
5df6d737 AJ |
776 | } |
777 | ||
778 | /* | |
779 | * fnic_fcpio_icmnd_cmpl_handler | |
780 | * Routine to handle icmnd completions | |
781 | */ | |
782 | static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, | |
783 | struct fcpio_fw_req *desc) | |
784 | { | |
785 | u8 type; | |
786 | u8 hdr_status; | |
787 | struct fcpio_tag tag; | |
788 | u32 id; | |
789 | u64 xfer_len = 0; | |
790 | struct fcpio_icmnd_cmpl *icmnd_cmpl; | |
791 | struct fnic_io_req *io_req; | |
792 | struct scsi_cmnd *sc; | |
67125b02 | 793 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 AJ |
794 | unsigned long flags; |
795 | spinlock_t *io_lock; | |
4d7007b4 | 796 | u64 cmd_trace; |
14eb5d90 | 797 | unsigned long start_time; |
5df6d737 AJ |
798 | |
799 | /* Decode the cmpl description to get the io_req id */ | |
800 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
801 | fcpio_tag_id_dec(&tag, &id); | |
14eb5d90 | 802 | icmnd_cmpl = &desc->u.icmnd_cmpl; |
5df6d737 | 803 | |
fc85799e | 804 | if (id >= fnic->fnic_max_tag_id) { |
03298552 HP |
805 | shost_printk(KERN_ERR, fnic->lport->host, |
806 | "Tag out of range tag %x hdr status = %s\n", | |
807 | id, fnic_fcpio_status_to_str(hdr_status)); | |
5df6d737 | 808 | return; |
03298552 | 809 | } |
5df6d737 AJ |
810 | |
811 | sc = scsi_host_find_tag(fnic->lport->host, id); | |
812 | WARN_ON_ONCE(!sc); | |
14eb5d90 | 813 | if (!sc) { |
67125b02 | 814 | atomic64_inc(&fnic_stats->io_stats.sc_null); |
14eb5d90 HP |
815 | shost_printk(KERN_ERR, fnic->lport->host, |
816 | "icmnd_cmpl sc is null - " | |
817 | "hdr status = %s tag = 0x%x desc = 0x%p\n", | |
818 | fnic_fcpio_status_to_str(hdr_status), id, desc); | |
4d7007b4 HP |
819 | FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, |
820 | fnic->lport->host->host_no, id, | |
821 | ((u64)icmnd_cmpl->_resvd0[1] << 16 | | |
822 | (u64)icmnd_cmpl->_resvd0[0]), | |
823 | ((u64)hdr_status << 16 | | |
824 | (u64)icmnd_cmpl->scsi_status << 8 | | |
825 | (u64)icmnd_cmpl->flags), desc, | |
826 | (u64)icmnd_cmpl->residual, 0); | |
5df6d737 | 827 | return; |
14eb5d90 | 828 | } |
5df6d737 AJ |
829 | |
830 | io_lock = fnic_io_lock_hash(fnic, sc); | |
831 | spin_lock_irqsave(io_lock, flags); | |
832 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
833 | WARN_ON_ONCE(!io_req); | |
834 | if (!io_req) { | |
67125b02 | 835 | atomic64_inc(&fnic_stats->io_stats.ioreq_null); |
14eb5d90 | 836 | CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; |
5df6d737 | 837 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 HP |
838 | shost_printk(KERN_ERR, fnic->lport->host, |
839 | "icmnd_cmpl io_req is null - " | |
840 | "hdr status = %s tag = 0x%x sc 0x%p\n", | |
841 | fnic_fcpio_status_to_str(hdr_status), id, sc); | |
5df6d737 AJ |
842 | return; |
843 | } | |
14eb5d90 | 844 | start_time = io_req->start_time; |
5df6d737 AJ |
845 | |
846 | /* firmware completed the io */ | |
847 | io_req->io_completed = 1; | |
848 | ||
849 | /* | |
850 | * if SCSI-ML has already issued abort on this command, | |
851 | * ignore completion of the IO. The abts path will clean it up | |
852 | */ | |
853 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
854 | spin_unlock_irqrestore(io_lock, flags); | |
14eb5d90 HP |
855 | CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; |
856 | switch (hdr_status) { | |
857 | case FCPIO_SUCCESS: | |
858 | CMD_FLAGS(sc) |= FNIC_IO_DONE; | |
859 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
860 | "icmnd_cmpl ABTS pending hdr status = %s " | |
861 | "sc 0x%p scsi_status %x residual %d\n", | |
862 | fnic_fcpio_status_to_str(hdr_status), sc, | |
863 | icmnd_cmpl->scsi_status, | |
864 | icmnd_cmpl->residual); | |
865 | break; | |
866 | case FCPIO_ABORTED: | |
867 | CMD_FLAGS(sc) |= FNIC_IO_ABORTED; | |
868 | break; | |
869 | default: | |
870 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
871 | "icmnd_cmpl abts pending " | |
872 | "hdr status = %s tag = 0x%x sc = 0x%p\n", | |
873 | fnic_fcpio_status_to_str(hdr_status), | |
874 | id, sc); | |
875 | break; | |
876 | } | |
5df6d737 AJ |
877 | return; |
878 | } | |
879 | ||
880 | /* Mark the IO as complete */ | |
881 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
882 | ||
883 | icmnd_cmpl = &desc->u.icmnd_cmpl; | |
884 | ||
885 | switch (hdr_status) { | |
886 | case FCPIO_SUCCESS: | |
887 | sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; | |
888 | xfer_len = scsi_bufflen(sc); | |
889 | scsi_set_resid(sc, icmnd_cmpl->residual); | |
890 | ||
891 | if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) | |
892 | xfer_len -= icmnd_cmpl->residual; | |
893 | ||
67125b02 HP |
894 | if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) |
895 | atomic64_inc(&fnic_stats->misc_stats.queue_fulls); | |
5df6d737 AJ |
896 | break; |
897 | ||
898 | case FCPIO_TIMEOUT: /* request was timed out */ | |
67125b02 | 899 | atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); |
5df6d737 AJ |
900 | sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; |
901 | break; | |
902 | ||
903 | case FCPIO_ABORTED: /* request was aborted */ | |
67125b02 | 904 | atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); |
5df6d737 AJ |
905 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; |
906 | break; | |
907 | ||
908 | case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ | |
67125b02 | 909 | atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); |
5df6d737 AJ |
910 | scsi_set_resid(sc, icmnd_cmpl->residual); |
911 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
912 | break; | |
913 | ||
914 | case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ | |
67125b02 | 915 | atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); |
5df6d737 AJ |
916 | sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; |
917 | break; | |
67125b02 | 918 | |
5df6d737 | 919 | case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ |
67125b02 HP |
920 | atomic64_inc(&fnic_stats->io_stats.io_not_found); |
921 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
922 | break; | |
923 | ||
5df6d737 | 924 | case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ |
67125b02 HP |
925 | atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); |
926 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
927 | break; | |
928 | ||
5df6d737 | 929 | case FCPIO_FW_ERR: /* request was terminated due fw error */ |
67125b02 HP |
930 | atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); |
931 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
932 | break; | |
933 | ||
934 | case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ | |
935 | atomic64_inc(&fnic_stats->misc_stats.mss_invalid); | |
936 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
937 | break; | |
938 | ||
939 | case FCPIO_INVALID_HEADER: /* header contains invalid data */ | |
940 | case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ | |
941 | case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ | |
5df6d737 AJ |
942 | default: |
943 | shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", | |
944 | fnic_fcpio_status_to_str(hdr_status)); | |
945 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
946 | break; | |
947 | } | |
948 | ||
67125b02 HP |
949 | if (hdr_status != FCPIO_SUCCESS) { |
950 | atomic64_inc(&fnic_stats->io_stats.io_failures); | |
951 | shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", | |
952 | fnic_fcpio_status_to_str(hdr_status)); | |
953 | } | |
5df6d737 AJ |
954 | /* Break link with the SCSI command */ |
955 | CMD_SP(sc) = NULL; | |
14eb5d90 | 956 | CMD_FLAGS(sc) |= FNIC_IO_DONE; |
5df6d737 AJ |
957 | |
958 | spin_unlock_irqrestore(io_lock, flags); | |
959 | ||
960 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
961 | ||
962 | mempool_free(io_req, fnic->io_req_pool); | |
963 | ||
4d7007b4 HP |
964 | cmd_trace = ((u64)hdr_status << 56) | |
965 | (u64)icmnd_cmpl->scsi_status << 48 | | |
966 | (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | | |
967 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
968 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; | |
969 | ||
970 | FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, | |
971 | sc->device->host->host_no, id, sc, | |
972 | ((u64)icmnd_cmpl->_resvd0[1] << 56 | | |
973 | (u64)icmnd_cmpl->_resvd0[0] << 48 | | |
974 | jiffies_to_msecs(jiffies - start_time)), | |
975 | desc, cmd_trace, | |
976 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
977 | ||
5df6d737 AJ |
978 | if (sc->sc_data_direction == DMA_FROM_DEVICE) { |
979 | fnic->lport->host_stats.fcp_input_requests++; | |
980 | fnic->fcp_input_bytes += xfer_len; | |
981 | } else if (sc->sc_data_direction == DMA_TO_DEVICE) { | |
982 | fnic->lport->host_stats.fcp_output_requests++; | |
983 | fnic->fcp_output_bytes += xfer_len; | |
984 | } else | |
985 | fnic->lport->host_stats.fcp_control_requests++; | |
986 | ||
67125b02 HP |
987 | atomic64_dec(&fnic_stats->io_stats.active_ios); |
988 | if (atomic64_read(&fnic->io_cmpl_skip)) | |
989 | atomic64_dec(&fnic->io_cmpl_skip); | |
990 | else | |
991 | atomic64_inc(&fnic_stats->io_stats.io_completions); | |
992 | ||
5df6d737 AJ |
993 | /* Call SCSI completion function to complete the IO */ |
994 | if (sc->scsi_done) | |
995 | sc->scsi_done(sc); | |
5df6d737 AJ |
996 | } |
997 | ||
998 | /* fnic_fcpio_itmf_cmpl_handler | |
999 | * Routine to handle itmf completions | |
1000 | */ | |
1001 | static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, | |
1002 | struct fcpio_fw_req *desc) | |
1003 | { | |
1004 | u8 type; | |
1005 | u8 hdr_status; | |
1006 | struct fcpio_tag tag; | |
1007 | u32 id; | |
1008 | struct scsi_cmnd *sc; | |
1009 | struct fnic_io_req *io_req; | |
67125b02 HP |
1010 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
1011 | struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; | |
1012 | struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; | |
1013 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; | |
5df6d737 AJ |
1014 | unsigned long flags; |
1015 | spinlock_t *io_lock; | |
14eb5d90 | 1016 | unsigned long start_time; |
5df6d737 AJ |
1017 | |
1018 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
1019 | fcpio_tag_id_dec(&tag, &id); | |
1020 | ||
fc85799e | 1021 | if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { |
03298552 HP |
1022 | shost_printk(KERN_ERR, fnic->lport->host, |
1023 | "Tag out of range tag %x hdr status = %s\n", | |
1024 | id, fnic_fcpio_status_to_str(hdr_status)); | |
5df6d737 | 1025 | return; |
03298552 | 1026 | } |
5df6d737 AJ |
1027 | |
1028 | sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); | |
1029 | WARN_ON_ONCE(!sc); | |
14eb5d90 | 1030 | if (!sc) { |
67125b02 | 1031 | atomic64_inc(&fnic_stats->io_stats.sc_null); |
14eb5d90 HP |
1032 | shost_printk(KERN_ERR, fnic->lport->host, |
1033 | "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", | |
1034 | fnic_fcpio_status_to_str(hdr_status), id); | |
5df6d737 | 1035 | return; |
14eb5d90 | 1036 | } |
5df6d737 AJ |
1037 | io_lock = fnic_io_lock_hash(fnic, sc); |
1038 | spin_lock_irqsave(io_lock, flags); | |
1039 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1040 | WARN_ON_ONCE(!io_req); | |
1041 | if (!io_req) { | |
67125b02 | 1042 | atomic64_inc(&fnic_stats->io_stats.ioreq_null); |
5df6d737 | 1043 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 HP |
1044 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; |
1045 | shost_printk(KERN_ERR, fnic->lport->host, | |
1046 | "itmf_cmpl io_req is null - " | |
1047 | "hdr status = %s tag = 0x%x sc 0x%p\n", | |
1048 | fnic_fcpio_status_to_str(hdr_status), id, sc); | |
5df6d737 AJ |
1049 | return; |
1050 | } | |
14eb5d90 | 1051 | start_time = io_req->start_time; |
5df6d737 | 1052 | |
03298552 HP |
1053 | if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { |
1054 | /* Abort and terminate completion of device reset req */ | |
1055 | /* REVISIT : Add asserts about various flags */ | |
1056 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1057 | "dev reset abts cmpl recd. id %x status %s\n", | |
1058 | id, fnic_fcpio_status_to_str(hdr_status)); | |
1059 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; | |
1060 | CMD_ABTS_STATUS(sc) = hdr_status; | |
1061 | CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; | |
1062 | if (io_req->abts_done) | |
1063 | complete(io_req->abts_done); | |
1064 | spin_unlock_irqrestore(io_lock, flags); | |
1065 | } else if (id & FNIC_TAG_ABORT) { | |
5df6d737 | 1066 | /* Completion of abort cmd */ |
67125b02 HP |
1067 | switch (hdr_status) { |
1068 | case FCPIO_SUCCESS: | |
1069 | break; | |
1070 | case FCPIO_TIMEOUT: | |
1071 | if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) | |
1072 | atomic64_inc(&abts_stats->abort_fw_timeouts); | |
1073 | else | |
1074 | atomic64_inc( | |
1075 | &term_stats->terminate_fw_timeouts); | |
1076 | break; | |
1077 | case FCPIO_IO_NOT_FOUND: | |
1078 | if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) | |
1079 | atomic64_inc(&abts_stats->abort_io_not_found); | |
1080 | else | |
1081 | atomic64_inc( | |
1082 | &term_stats->terminate_io_not_found); | |
1083 | break; | |
1084 | default: | |
1085 | if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) | |
1086 | atomic64_inc(&abts_stats->abort_failures); | |
1087 | else | |
1088 | atomic64_inc( | |
1089 | &term_stats->terminate_failures); | |
1090 | break; | |
1091 | } | |
5df6d737 AJ |
1092 | if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { |
1093 | /* This is a late completion. Ignore it */ | |
1094 | spin_unlock_irqrestore(io_lock, flags); | |
1095 | return; | |
1096 | } | |
5df6d737 | 1097 | CMD_ABTS_STATUS(sc) = hdr_status; |
14eb5d90 | 1098 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; |
67125b02 HP |
1099 | |
1100 | atomic64_dec(&fnic_stats->io_stats.active_ios); | |
1101 | if (atomic64_read(&fnic->io_cmpl_skip)) | |
1102 | atomic64_dec(&fnic->io_cmpl_skip); | |
1103 | else | |
1104 | atomic64_inc(&fnic_stats->io_stats.io_completions); | |
1105 | ||
1106 | if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) | |
1107 | atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); | |
1108 | ||
5df6d737 AJ |
1109 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1110 | "abts cmpl recd. id %d status %s\n", | |
1111 | (int)(id & FNIC_TAG_MASK), | |
1112 | fnic_fcpio_status_to_str(hdr_status)); | |
1113 | ||
1114 | /* | |
1115 | * If scsi_eh thread is blocked waiting for abts to complete, | |
1116 | * signal completion to it. IO will be cleaned in the thread | |
1117 | * else clean it in this context | |
1118 | */ | |
1119 | if (io_req->abts_done) { | |
1120 | complete(io_req->abts_done); | |
1121 | spin_unlock_irqrestore(io_lock, flags); | |
1122 | } else { | |
1123 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1124 | "abts cmpl, completing IO\n"); | |
1125 | CMD_SP(sc) = NULL; | |
1126 | sc->result = (DID_ERROR << 16); | |
1127 | ||
1128 | spin_unlock_irqrestore(io_lock, flags); | |
1129 | ||
1130 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
1131 | mempool_free(io_req, fnic->io_req_pool); | |
4d7007b4 HP |
1132 | if (sc->scsi_done) { |
1133 | FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, | |
1134 | sc->device->host->host_no, id, | |
1135 | sc, | |
1136 | jiffies_to_msecs(jiffies - start_time), | |
1137 | desc, | |
1138 | (((u64)hdr_status << 40) | | |
1139 | (u64)sc->cmnd[0] << 32 | | |
1140 | (u64)sc->cmnd[2] << 24 | | |
1141 | (u64)sc->cmnd[3] << 16 | | |
1142 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1143 | (((u64)CMD_FLAGS(sc) << 32) | | |
1144 | CMD_STATE(sc))); | |
5df6d737 | 1145 | sc->scsi_done(sc); |
4d7007b4 | 1146 | } |
5df6d737 AJ |
1147 | } |
1148 | ||
1149 | } else if (id & FNIC_TAG_DEV_RST) { | |
1150 | /* Completion of device reset */ | |
1151 | CMD_LR_STATUS(sc) = hdr_status; | |
03298552 HP |
1152 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { |
1153 | spin_unlock_irqrestore(io_lock, flags); | |
14eb5d90 | 1154 | CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; |
4d7007b4 HP |
1155 | FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, |
1156 | sc->device->host->host_no, id, sc, | |
1157 | jiffies_to_msecs(jiffies - start_time), | |
1158 | desc, 0, | |
1159 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
03298552 HP |
1160 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1161 | "Terminate pending " | |
1162 | "dev reset cmpl recd. id %d status %s\n", | |
1163 | (int)(id & FNIC_TAG_MASK), | |
1164 | fnic_fcpio_status_to_str(hdr_status)); | |
1165 | return; | |
1166 | } | |
1167 | if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { | |
1168 | /* Need to wait for terminate completion */ | |
1169 | spin_unlock_irqrestore(io_lock, flags); | |
4d7007b4 HP |
1170 | FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, |
1171 | sc->device->host->host_no, id, sc, | |
1172 | jiffies_to_msecs(jiffies - start_time), | |
1173 | desc, 0, | |
1174 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
03298552 HP |
1175 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1176 | "dev reset cmpl recd after time out. " | |
1177 | "id %d status %s\n", | |
1178 | (int)(id & FNIC_TAG_MASK), | |
1179 | fnic_fcpio_status_to_str(hdr_status)); | |
1180 | return; | |
1181 | } | |
5df6d737 | 1182 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; |
03298552 | 1183 | CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; |
5df6d737 AJ |
1184 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1185 | "dev reset cmpl recd. id %d status %s\n", | |
1186 | (int)(id & FNIC_TAG_MASK), | |
1187 | fnic_fcpio_status_to_str(hdr_status)); | |
1188 | if (io_req->dr_done) | |
1189 | complete(io_req->dr_done); | |
1190 | spin_unlock_irqrestore(io_lock, flags); | |
1191 | ||
1192 | } else { | |
1193 | shost_printk(KERN_ERR, fnic->lport->host, | |
1194 | "Unexpected itmf io state %s tag %x\n", | |
1195 | fnic_ioreq_state_to_str(CMD_STATE(sc)), id); | |
1196 | spin_unlock_irqrestore(io_lock, flags); | |
1197 | } | |
1198 | ||
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * fnic_fcpio_cmpl_handler | |
1203 | * Routine to service the cq for wq_copy | |
1204 | */ | |
1205 | static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, | |
1206 | unsigned int cq_index, | |
1207 | struct fcpio_fw_req *desc) | |
1208 | { | |
1209 | struct fnic *fnic = vnic_dev_priv(vdev); | |
5df6d737 | 1210 | |
67125b02 HP |
1211 | switch (desc->hdr.type) { |
1212 | case FCPIO_ICMND_CMPL: /* fw completed a command */ | |
1213 | case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ | |
1214 | case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ | |
1215 | case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ | |
1216 | case FCPIO_RESET_CMPL: /* fw completed reset */ | |
1217 | atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); | |
1218 | break; | |
1219 | default: | |
1220 | break; | |
1221 | } | |
1222 | ||
5df6d737 AJ |
1223 | switch (desc->hdr.type) { |
1224 | case FCPIO_ACK: /* fw copied copy wq desc to its queue */ | |
1225 | fnic_fcpio_ack_handler(fnic, cq_index, desc); | |
1226 | break; | |
1227 | ||
1228 | case FCPIO_ICMND_CMPL: /* fw completed a command */ | |
1229 | fnic_fcpio_icmnd_cmpl_handler(fnic, desc); | |
1230 | break; | |
1231 | ||
1232 | case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ | |
1233 | fnic_fcpio_itmf_cmpl_handler(fnic, desc); | |
1234 | break; | |
1235 | ||
1236 | case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ | |
78112e55 | 1237 | case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ |
03298552 | 1238 | fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); |
5df6d737 AJ |
1239 | break; |
1240 | ||
1241 | case FCPIO_RESET_CMPL: /* fw completed reset */ | |
03298552 | 1242 | fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); |
5df6d737 AJ |
1243 | break; |
1244 | ||
1245 | default: | |
1246 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1247 | "firmware completion type %d\n", | |
1248 | desc->hdr.type); | |
1249 | break; | |
1250 | } | |
1251 | ||
03298552 | 1252 | return 0; |
5df6d737 AJ |
1253 | } |
1254 | ||
1255 | /* | |
1256 | * fnic_wq_copy_cmpl_handler | |
1257 | * Routine to process wq copy | |
1258 | */ | |
1259 | int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) | |
1260 | { | |
1261 | unsigned int wq_work_done = 0; | |
1262 | unsigned int i, cq_index; | |
1263 | unsigned int cur_work_done; | |
1264 | ||
1265 | for (i = 0; i < fnic->wq_copy_count; i++) { | |
1266 | cq_index = i + fnic->raw_wq_count + fnic->rq_count; | |
1267 | cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], | |
1268 | fnic_fcpio_cmpl_handler, | |
1269 | copy_work_to_do); | |
1270 | wq_work_done += cur_work_done; | |
1271 | } | |
1272 | return wq_work_done; | |
1273 | } | |
1274 | ||
1275 | static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) | |
1276 | { | |
1259c5dc | 1277 | int i; |
5df6d737 AJ |
1278 | struct fnic_io_req *io_req; |
1279 | unsigned long flags = 0; | |
1280 | struct scsi_cmnd *sc; | |
1281 | spinlock_t *io_lock; | |
14eb5d90 | 1282 | unsigned long start_time = 0; |
67125b02 | 1283 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 | 1284 | |
fc85799e | 1285 | for (i = 0; i < fnic->fnic_max_tag_id; i++) { |
5df6d737 AJ |
1286 | if (i == exclude_id) |
1287 | continue; | |
1288 | ||
1259c5dc SB |
1289 | io_lock = fnic_io_lock_tag(fnic, i); |
1290 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 | 1291 | sc = scsi_host_find_tag(fnic->lport->host, i); |
1259c5dc SB |
1292 | if (!sc) { |
1293 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1294 | continue; |
1259c5dc | 1295 | } |
5df6d737 | 1296 | |
5df6d737 | 1297 | io_req = (struct fnic_io_req *)CMD_SP(sc); |
03298552 HP |
1298 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && |
1299 | !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { | |
1300 | /* | |
1301 | * We will be here only when FW completes reset | |
1302 | * without sending completions for outstanding ios. | |
1303 | */ | |
1304 | CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; | |
1305 | if (io_req && io_req->dr_done) | |
1306 | complete(io_req->dr_done); | |
1307 | else if (io_req && io_req->abts_done) | |
1308 | complete(io_req->abts_done); | |
1309 | spin_unlock_irqrestore(io_lock, flags); | |
1310 | continue; | |
1311 | } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { | |
1312 | spin_unlock_irqrestore(io_lock, flags); | |
1313 | continue; | |
1314 | } | |
5df6d737 AJ |
1315 | if (!io_req) { |
1316 | spin_unlock_irqrestore(io_lock, flags); | |
1317 | goto cleanup_scsi_cmd; | |
1318 | } | |
1319 | ||
1320 | CMD_SP(sc) = NULL; | |
1321 | ||
1322 | spin_unlock_irqrestore(io_lock, flags); | |
1323 | ||
1324 | /* | |
1325 | * If there is a scsi_cmnd associated with this io_req, then | |
1326 | * free the corresponding state | |
1327 | */ | |
14eb5d90 | 1328 | start_time = io_req->start_time; |
5df6d737 AJ |
1329 | fnic_release_ioreq_buf(fnic, io_req, sc); |
1330 | mempool_free(io_req, fnic->io_req_pool); | |
1331 | ||
1332 | cleanup_scsi_cmd: | |
1333 | sc->result = DID_TRANSPORT_DISRUPTED << 16; | |
66818663 HS |
1334 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1335 | "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n", | |
1336 | __func__, (jiffies - start_time)); | |
5df6d737 | 1337 | |
67125b02 HP |
1338 | if (atomic64_read(&fnic->io_cmpl_skip)) |
1339 | atomic64_dec(&fnic->io_cmpl_skip); | |
1340 | else | |
1341 | atomic64_inc(&fnic_stats->io_stats.io_completions); | |
1342 | ||
5df6d737 | 1343 | /* Complete the command to SCSI */ |
4d7007b4 HP |
1344 | if (sc->scsi_done) { |
1345 | FNIC_TRACE(fnic_cleanup_io, | |
1346 | sc->device->host->host_no, i, sc, | |
1347 | jiffies_to_msecs(jiffies - start_time), | |
1348 | 0, ((u64)sc->cmnd[0] << 32 | | |
1349 | (u64)sc->cmnd[2] << 24 | | |
1350 | (u64)sc->cmnd[3] << 16 | | |
1351 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1352 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
1353 | ||
5df6d737 | 1354 | sc->scsi_done(sc); |
4d7007b4 | 1355 | } |
5df6d737 AJ |
1356 | } |
1357 | } | |
1358 | ||
1359 | void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, | |
1360 | struct fcpio_host_req *desc) | |
1361 | { | |
1362 | u32 id; | |
1363 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
1364 | struct fnic_io_req *io_req; | |
1365 | struct scsi_cmnd *sc; | |
1366 | unsigned long flags; | |
1367 | spinlock_t *io_lock; | |
14eb5d90 | 1368 | unsigned long start_time = 0; |
5df6d737 AJ |
1369 | |
1370 | /* get the tag reference */ | |
1371 | fcpio_tag_id_dec(&desc->hdr.tag, &id); | |
1372 | id &= FNIC_TAG_MASK; | |
1373 | ||
fc85799e | 1374 | if (id >= fnic->fnic_max_tag_id) |
5df6d737 AJ |
1375 | return; |
1376 | ||
1377 | sc = scsi_host_find_tag(fnic->lport->host, id); | |
1378 | if (!sc) | |
1379 | return; | |
1380 | ||
1381 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1382 | spin_lock_irqsave(io_lock, flags); | |
1383 | ||
1384 | /* Get the IO context which this desc refers to */ | |
1385 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1386 | ||
1387 | /* fnic interrupts are turned off by now */ | |
1388 | ||
1389 | if (!io_req) { | |
1390 | spin_unlock_irqrestore(io_lock, flags); | |
1391 | goto wq_copy_cleanup_scsi_cmd; | |
1392 | } | |
1393 | ||
1394 | CMD_SP(sc) = NULL; | |
1395 | ||
1396 | spin_unlock_irqrestore(io_lock, flags); | |
1397 | ||
14eb5d90 | 1398 | start_time = io_req->start_time; |
5df6d737 AJ |
1399 | fnic_release_ioreq_buf(fnic, io_req, sc); |
1400 | mempool_free(io_req, fnic->io_req_pool); | |
1401 | ||
1402 | wq_copy_cleanup_scsi_cmd: | |
1403 | sc->result = DID_NO_CONNECT << 16; | |
1404 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" | |
1405 | " DID_NO_CONNECT\n"); | |
1406 | ||
4d7007b4 HP |
1407 | if (sc->scsi_done) { |
1408 | FNIC_TRACE(fnic_wq_copy_cleanup_handler, | |
1409 | sc->device->host->host_no, id, sc, | |
1410 | jiffies_to_msecs(jiffies - start_time), | |
1411 | 0, ((u64)sc->cmnd[0] << 32 | | |
1412 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
1413 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1414 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
1415 | ||
5df6d737 | 1416 | sc->scsi_done(sc); |
4d7007b4 | 1417 | } |
5df6d737 AJ |
1418 | } |
1419 | ||
1420 | static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, | |
1421 | u32 task_req, u8 *fc_lun, | |
1422 | struct fnic_io_req *io_req) | |
1423 | { | |
1424 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
03298552 | 1425 | struct Scsi_Host *host = fnic->lport->host; |
67125b02 | 1426 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; |
5df6d737 AJ |
1427 | unsigned long flags; |
1428 | ||
03298552 HP |
1429 | spin_lock_irqsave(host->host_lock, flags); |
1430 | if (unlikely(fnic_chk_state_flags_locked(fnic, | |
1431 | FNIC_FLAGS_IO_BLOCKED))) { | |
1432 | spin_unlock_irqrestore(host->host_lock, flags); | |
1433 | return 1; | |
1434 | } else | |
1435 | atomic_inc(&fnic->in_flight); | |
1436 | spin_unlock_irqrestore(host->host_lock, flags); | |
1437 | ||
5df6d737 AJ |
1438 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); |
1439 | ||
1440 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
1441 | free_wq_copy_descs(fnic, wq); | |
1442 | ||
1443 | if (!vnic_wq_copy_desc_avail(wq)) { | |
1444 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
03298552 | 1445 | atomic_dec(&fnic->in_flight); |
14eb5d90 | 1446 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
03298552 | 1447 | "fnic_queue_abort_io_req: failure: no descriptors\n"); |
67125b02 | 1448 | atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); |
5df6d737 AJ |
1449 | return 1; |
1450 | } | |
1451 | fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, | |
1452 | 0, task_req, tag, fc_lun, io_req->port_id, | |
1453 | fnic->config.ra_tov, fnic->config.ed_tov); | |
1454 | ||
67125b02 HP |
1455 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
1456 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
1457 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
1458 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
1459 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
1460 | ||
5df6d737 | 1461 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); |
03298552 HP |
1462 | atomic_dec(&fnic->in_flight); |
1463 | ||
5df6d737 AJ |
1464 | return 0; |
1465 | } | |
1466 | ||
03298552 | 1467 | static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) |
5df6d737 AJ |
1468 | { |
1469 | int tag; | |
03298552 | 1470 | int abt_tag; |
67125b02 | 1471 | int term_cnt = 0; |
5df6d737 AJ |
1472 | struct fnic_io_req *io_req; |
1473 | spinlock_t *io_lock; | |
1474 | unsigned long flags; | |
1475 | struct scsi_cmnd *sc; | |
67125b02 HP |
1476 | struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; |
1477 | struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; | |
5df6d737 AJ |
1478 | struct scsi_lun fc_lun; |
1479 | enum fnic_ioreq_state old_ioreq_state; | |
1480 | ||
1481 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1482 | fnic->lport->host, | |
03298552 | 1483 | "fnic_rport_exch_reset called portid 0x%06x\n", |
5df6d737 AJ |
1484 | port_id); |
1485 | ||
1486 | if (fnic->in_remove) | |
1487 | return; | |
1488 | ||
fc85799e | 1489 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
03298552 | 1490 | abt_tag = tag; |
1259c5dc SB |
1491 | io_lock = fnic_io_lock_tag(fnic, tag); |
1492 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 | 1493 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
1259c5dc SB |
1494 | if (!sc) { |
1495 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1496 | continue; |
1259c5dc | 1497 | } |
5df6d737 AJ |
1498 | |
1499 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1500 | ||
1501 | if (!io_req || io_req->port_id != port_id) { | |
1502 | spin_unlock_irqrestore(io_lock, flags); | |
1503 | continue; | |
1504 | } | |
1505 | ||
03298552 | 1506 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && |
14eb5d90 | 1507 | (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { |
03298552 HP |
1508 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1509 | "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", | |
1510 | sc); | |
1511 | spin_unlock_irqrestore(io_lock, flags); | |
1512 | continue; | |
1513 | } | |
1514 | ||
5df6d737 AJ |
1515 | /* |
1516 | * Found IO that is still pending with firmware and | |
1517 | * belongs to rport that went away | |
1518 | */ | |
1519 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1520 | spin_unlock_irqrestore(io_lock, flags); | |
1521 | continue; | |
1522 | } | |
03298552 HP |
1523 | if (io_req->abts_done) { |
1524 | shost_printk(KERN_ERR, fnic->lport->host, | |
1525 | "fnic_rport_exch_reset: io_req->abts_done is set " | |
1526 | "state is %s\n", | |
1527 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
1528 | } | |
1529 | ||
14eb5d90 HP |
1530 | if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { |
1531 | shost_printk(KERN_ERR, fnic->lport->host, | |
1532 | "rport_exch_reset " | |
1533 | "IO not yet issued %p tag 0x%x flags " | |
1534 | "%x state %d\n", | |
1535 | sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); | |
1536 | } | |
5df6d737 AJ |
1537 | old_ioreq_state = CMD_STATE(sc); |
1538 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1539 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
03298552 | 1540 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { |
67125b02 | 1541 | atomic64_inc(&reset_stats->device_reset_terminates); |
03298552 HP |
1542 | abt_tag = (tag | FNIC_TAG_DEV_RST); |
1543 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1544 | "fnic_rport_exch_reset dev rst sc 0x%p\n", | |
1545 | sc); | |
1546 | } | |
5df6d737 AJ |
1547 | |
1548 | BUG_ON(io_req->abts_done); | |
1549 | ||
1550 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1551 | "fnic_rport_reset_exch: Issuing abts\n"); | |
1552 | ||
1553 | spin_unlock_irqrestore(io_lock, flags); | |
1554 | ||
1555 | /* Now queue the abort command to firmware */ | |
1556 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1557 | ||
03298552 | 1558 | if (fnic_queue_abort_io_req(fnic, abt_tag, |
5df6d737 AJ |
1559 | FCPIO_ITMF_ABT_TASK_TERM, |
1560 | fc_lun.scsi_lun, io_req)) { | |
1561 | /* | |
1562 | * Revert the cmd state back to old state, if | |
25985edc | 1563 | * it hasn't changed in between. This cmd will get |
5df6d737 AJ |
1564 | * aborted later by scsi_eh, or cleaned up during |
1565 | * lun reset | |
1566 | */ | |
5df6d737 AJ |
1567 | spin_lock_irqsave(io_lock, flags); |
1568 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) | |
1569 | CMD_STATE(sc) = old_ioreq_state; | |
1570 | spin_unlock_irqrestore(io_lock, flags); | |
03298552 HP |
1571 | } else { |
1572 | spin_lock_irqsave(io_lock, flags); | |
a0bf1ca2 HP |
1573 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) |
1574 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
14eb5d90 HP |
1575 | else |
1576 | CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; | |
03298552 | 1577 | spin_unlock_irqrestore(io_lock, flags); |
67125b02 HP |
1578 | atomic64_inc(&term_stats->terminates); |
1579 | term_cnt++; | |
5df6d737 AJ |
1580 | } |
1581 | } | |
67125b02 HP |
1582 | if (term_cnt > atomic64_read(&term_stats->max_terminates)) |
1583 | atomic64_set(&term_stats->max_terminates, term_cnt); | |
5df6d737 AJ |
1584 | |
1585 | } | |
1586 | ||
1587 | void fnic_terminate_rport_io(struct fc_rport *rport) | |
1588 | { | |
1589 | int tag; | |
03298552 | 1590 | int abt_tag; |
67125b02 | 1591 | int term_cnt = 0; |
5df6d737 AJ |
1592 | struct fnic_io_req *io_req; |
1593 | spinlock_t *io_lock; | |
1594 | unsigned long flags; | |
1595 | struct scsi_cmnd *sc; | |
1596 | struct scsi_lun fc_lun; | |
d0385d92 SB |
1597 | struct fc_rport_libfc_priv *rdata; |
1598 | struct fc_lport *lport; | |
1599 | struct fnic *fnic; | |
5df6d737 | 1600 | struct fc_rport *cmd_rport; |
67125b02 HP |
1601 | struct reset_stats *reset_stats; |
1602 | struct terminate_stats *term_stats; | |
5df6d737 AJ |
1603 | enum fnic_ioreq_state old_ioreq_state; |
1604 | ||
d0385d92 SB |
1605 | if (!rport) { |
1606 | printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); | |
1607 | return; | |
1608 | } | |
1609 | rdata = rport->dd_data; | |
1610 | ||
1611 | if (!rdata) { | |
1612 | printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); | |
1613 | return; | |
1614 | } | |
1615 | lport = rdata->local_port; | |
1616 | ||
1617 | if (!lport) { | |
1618 | printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); | |
1619 | return; | |
1620 | } | |
1621 | fnic = lport_priv(lport); | |
5df6d737 AJ |
1622 | FNIC_SCSI_DBG(KERN_DEBUG, |
1623 | fnic->lport->host, "fnic_terminate_rport_io called" | |
03298552 HP |
1624 | " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", |
1625 | rport->port_name, rport->node_name, rport, | |
5df6d737 AJ |
1626 | rport->port_id); |
1627 | ||
1628 | if (fnic->in_remove) | |
1629 | return; | |
1630 | ||
67125b02 HP |
1631 | reset_stats = &fnic->fnic_stats.reset_stats; |
1632 | term_stats = &fnic->fnic_stats.term_stats; | |
1633 | ||
fc85799e | 1634 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
03298552 | 1635 | abt_tag = tag; |
1259c5dc SB |
1636 | io_lock = fnic_io_lock_tag(fnic, tag); |
1637 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 | 1638 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
1259c5dc SB |
1639 | if (!sc) { |
1640 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1641 | continue; |
1259c5dc | 1642 | } |
5df6d737 AJ |
1643 | |
1644 | cmd_rport = starget_to_rport(scsi_target(sc->device)); | |
1259c5dc SB |
1645 | if (rport != cmd_rport) { |
1646 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 1647 | continue; |
1259c5dc | 1648 | } |
5df6d737 AJ |
1649 | |
1650 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1651 | ||
1652 | if (!io_req || rport != cmd_rport) { | |
1653 | spin_unlock_irqrestore(io_lock, flags); | |
1654 | continue; | |
1655 | } | |
1656 | ||
03298552 | 1657 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && |
14eb5d90 | 1658 | (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { |
03298552 HP |
1659 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1660 | "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", | |
1661 | sc); | |
1662 | spin_unlock_irqrestore(io_lock, flags); | |
1663 | continue; | |
1664 | } | |
5df6d737 AJ |
1665 | /* |
1666 | * Found IO that is still pending with firmware and | |
1667 | * belongs to rport that went away | |
1668 | */ | |
1669 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1670 | spin_unlock_irqrestore(io_lock, flags); | |
1671 | continue; | |
1672 | } | |
03298552 HP |
1673 | if (io_req->abts_done) { |
1674 | shost_printk(KERN_ERR, fnic->lport->host, | |
1675 | "fnic_terminate_rport_io: io_req->abts_done is set " | |
1676 | "state is %s\n", | |
1677 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
1678 | } | |
14eb5d90 HP |
1679 | if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { |
1680 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
1681 | "fnic_terminate_rport_io " | |
1682 | "IO not yet issued %p tag 0x%x flags " | |
1683 | "%x state %d\n", | |
1684 | sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); | |
1685 | } | |
5df6d737 AJ |
1686 | old_ioreq_state = CMD_STATE(sc); |
1687 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1688 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
03298552 | 1689 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { |
67125b02 | 1690 | atomic64_inc(&reset_stats->device_reset_terminates); |
03298552 HP |
1691 | abt_tag = (tag | FNIC_TAG_DEV_RST); |
1692 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1693 | "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); | |
1694 | } | |
5df6d737 AJ |
1695 | |
1696 | BUG_ON(io_req->abts_done); | |
1697 | ||
1698 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1699 | fnic->lport->host, | |
1700 | "fnic_terminate_rport_io: Issuing abts\n"); | |
1701 | ||
1702 | spin_unlock_irqrestore(io_lock, flags); | |
1703 | ||
1704 | /* Now queue the abort command to firmware */ | |
1705 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1706 | ||
03298552 | 1707 | if (fnic_queue_abort_io_req(fnic, abt_tag, |
5df6d737 AJ |
1708 | FCPIO_ITMF_ABT_TASK_TERM, |
1709 | fc_lun.scsi_lun, io_req)) { | |
1710 | /* | |
1711 | * Revert the cmd state back to old state, if | |
25985edc | 1712 | * it hasn't changed in between. This cmd will get |
5df6d737 AJ |
1713 | * aborted later by scsi_eh, or cleaned up during |
1714 | * lun reset | |
1715 | */ | |
5df6d737 AJ |
1716 | spin_lock_irqsave(io_lock, flags); |
1717 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) | |
1718 | CMD_STATE(sc) = old_ioreq_state; | |
1719 | spin_unlock_irqrestore(io_lock, flags); | |
03298552 HP |
1720 | } else { |
1721 | spin_lock_irqsave(io_lock, flags); | |
a0bf1ca2 HP |
1722 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) |
1723 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
14eb5d90 HP |
1724 | else |
1725 | CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; | |
03298552 | 1726 | spin_unlock_irqrestore(io_lock, flags); |
67125b02 HP |
1727 | atomic64_inc(&term_stats->terminates); |
1728 | term_cnt++; | |
5df6d737 AJ |
1729 | } |
1730 | } | |
67125b02 HP |
1731 | if (term_cnt > atomic64_read(&term_stats->max_terminates)) |
1732 | atomic64_set(&term_stats->max_terminates, term_cnt); | |
5df6d737 AJ |
1733 | |
1734 | } | |
1735 | ||
5df6d737 AJ |
1736 | /* |
1737 | * This function is exported to SCSI for sending abort cmnds. | |
1738 | * A SCSI IO is represented by a io_req in the driver. | |
1739 | * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. | |
1740 | */ | |
1741 | int fnic_abort_cmd(struct scsi_cmnd *sc) | |
1742 | { | |
1743 | struct fc_lport *lp; | |
1744 | struct fnic *fnic; | |
4d7007b4 | 1745 | struct fnic_io_req *io_req = NULL; |
5df6d737 AJ |
1746 | struct fc_rport *rport; |
1747 | spinlock_t *io_lock; | |
1748 | unsigned long flags; | |
14eb5d90 | 1749 | unsigned long start_time = 0; |
5df6d737 | 1750 | int ret = SUCCESS; |
14eb5d90 | 1751 | u32 task_req = 0; |
5df6d737 | 1752 | struct scsi_lun fc_lun; |
67125b02 HP |
1753 | struct fnic_stats *fnic_stats; |
1754 | struct abort_stats *abts_stats; | |
1755 | struct terminate_stats *term_stats; | |
66818663 | 1756 | enum fnic_ioreq_state old_ioreq_state; |
03298552 | 1757 | int tag; |
5df6d737 AJ |
1758 | DECLARE_COMPLETION_ONSTACK(tm_done); |
1759 | ||
1760 | /* Wait for rport to unblock */ | |
65d430fa | 1761 | fc_block_scsi_eh(sc); |
5df6d737 AJ |
1762 | |
1763 | /* Get local-port, check ready and link up */ | |
1764 | lp = shost_priv(sc->device->host); | |
1765 | ||
1766 | fnic = lport_priv(lp); | |
67125b02 HP |
1767 | fnic_stats = &fnic->fnic_stats; |
1768 | abts_stats = &fnic->fnic_stats.abts_stats; | |
1769 | term_stats = &fnic->fnic_stats.term_stats; | |
1770 | ||
0db6f435 | 1771 | rport = starget_to_rport(scsi_target(sc->device)); |
03298552 HP |
1772 | tag = sc->request->tag; |
1773 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1774 | fnic->lport->host, | |
9cb78c16 | 1775 | "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", |
03298552 HP |
1776 | rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); |
1777 | ||
1778 | CMD_FLAGS(sc) = FNIC_NO_FLAGS; | |
1779 | ||
5df6d737 AJ |
1780 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) { |
1781 | ret = FAILED; | |
1782 | goto fnic_abort_cmd_end; | |
1783 | } | |
1784 | ||
1785 | /* | |
1786 | * Avoid a race between SCSI issuing the abort and the device | |
1787 | * completing the command. | |
1788 | * | |
1789 | * If the command is already completed by the fw cmpl code, | |
1790 | * we just return SUCCESS from here. This means that the abort | |
1791 | * succeeded. In the SCSI ML, since the timeout for command has | |
1792 | * happened, the completion wont actually complete the command | |
1793 | * and it will be considered as an aborted command | |
1794 | * | |
1795 | * The CMD_SP will not be cleared except while holding io_req_lock. | |
1796 | */ | |
1797 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1798 | spin_lock_irqsave(io_lock, flags); | |
1799 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1800 | if (!io_req) { | |
1801 | spin_unlock_irqrestore(io_lock, flags); | |
1802 | goto fnic_abort_cmd_end; | |
1803 | } | |
1804 | ||
1805 | io_req->abts_done = &tm_done; | |
1806 | ||
1807 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1808 | spin_unlock_irqrestore(io_lock, flags); | |
1809 | goto wait_pending; | |
1810 | } | |
1811 | /* | |
1812 | * Command is still pending, need to abort it | |
1813 | * If the firmware completes the command after this point, | |
1814 | * the completion wont be done till mid-layer, since abort | |
1815 | * has already started. | |
1816 | */ | |
66818663 | 1817 | old_ioreq_state = CMD_STATE(sc); |
5df6d737 AJ |
1818 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; |
1819 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
1820 | ||
1821 | spin_unlock_irqrestore(io_lock, flags); | |
1822 | ||
1823 | /* | |
1824 | * Check readiness of the remote port. If the path to remote | |
1825 | * port is up, then send abts to the remote port to terminate | |
1826 | * the IO. Else, just locally terminate the IO in the firmware | |
1827 | */ | |
5df6d737 AJ |
1828 | if (fc_remote_port_chkready(rport) == 0) |
1829 | task_req = FCPIO_ITMF_ABT_TASK; | |
67125b02 HP |
1830 | else { |
1831 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); | |
5df6d737 | 1832 | task_req = FCPIO_ITMF_ABT_TASK_TERM; |
67125b02 | 1833 | } |
5df6d737 AJ |
1834 | |
1835 | /* Now queue the abort command to firmware */ | |
1836 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1837 | ||
1838 | if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, | |
1839 | fc_lun.scsi_lun, io_req)) { | |
1840 | spin_lock_irqsave(io_lock, flags); | |
66818663 HS |
1841 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) |
1842 | CMD_STATE(sc) = old_ioreq_state; | |
5df6d737 AJ |
1843 | io_req = (struct fnic_io_req *)CMD_SP(sc); |
1844 | if (io_req) | |
1845 | io_req->abts_done = NULL; | |
1846 | spin_unlock_irqrestore(io_lock, flags); | |
1847 | ret = FAILED; | |
1848 | goto fnic_abort_cmd_end; | |
1849 | } | |
67125b02 | 1850 | if (task_req == FCPIO_ITMF_ABT_TASK) { |
14eb5d90 | 1851 | CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; |
67125b02 HP |
1852 | atomic64_inc(&fnic_stats->abts_stats.aborts); |
1853 | } else { | |
14eb5d90 | 1854 | CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; |
67125b02 HP |
1855 | atomic64_inc(&fnic_stats->term_stats.terminates); |
1856 | } | |
5df6d737 AJ |
1857 | |
1858 | /* | |
1859 | * We queued an abort IO, wait for its completion. | |
1860 | * Once the firmware completes the abort command, it will | |
1861 | * wake up this thread. | |
1862 | */ | |
1863 | wait_pending: | |
1864 | wait_for_completion_timeout(&tm_done, | |
1865 | msecs_to_jiffies | |
1866 | (2 * fnic->config.ra_tov + | |
1867 | fnic->config.ed_tov)); | |
1868 | ||
1869 | /* Check the abort status */ | |
1870 | spin_lock_irqsave(io_lock, flags); | |
1871 | ||
1872 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1873 | if (!io_req) { | |
67125b02 | 1874 | atomic64_inc(&fnic_stats->io_stats.ioreq_null); |
5df6d737 | 1875 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 | 1876 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; |
5df6d737 AJ |
1877 | ret = FAILED; |
1878 | goto fnic_abort_cmd_end; | |
1879 | } | |
1880 | io_req->abts_done = NULL; | |
1881 | ||
1882 | /* fw did not complete abort, timed out */ | |
1259c5dc | 1883 | if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { |
5df6d737 | 1884 | spin_unlock_irqrestore(io_lock, flags); |
67125b02 | 1885 | if (task_req == FCPIO_ITMF_ABT_TASK) { |
67125b02 HP |
1886 | atomic64_inc(&abts_stats->abort_drv_timeouts); |
1887 | } else { | |
67125b02 HP |
1888 | atomic64_inc(&term_stats->terminate_drv_timeouts); |
1889 | } | |
14eb5d90 | 1890 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; |
5df6d737 AJ |
1891 | ret = FAILED; |
1892 | goto fnic_abort_cmd_end; | |
1893 | } | |
1894 | ||
efc7a288 AC |
1895 | /* IO out of order */ |
1896 | ||
1897 | if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { | |
1898 | spin_unlock_irqrestore(io_lock, flags); | |
1899 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1900 | "Issuing Host reset due to out of order IO\n"); | |
1901 | ||
1902 | if (fnic_host_reset(sc) == FAILED) { | |
1903 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1904 | "fnic_host_reset failed.\n"); | |
1905 | } | |
1906 | ret = FAILED; | |
1907 | goto fnic_abort_cmd_end; | |
1908 | } | |
1909 | ||
1259c5dc SB |
1910 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; |
1911 | ||
5df6d737 AJ |
1912 | /* |
1913 | * firmware completed the abort, check the status, | |
1914 | * free the io_req irrespective of failure or success | |
1915 | */ | |
1916 | if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS) | |
1917 | ret = FAILED; | |
1918 | ||
1919 | CMD_SP(sc) = NULL; | |
1920 | ||
1921 | spin_unlock_irqrestore(io_lock, flags); | |
1922 | ||
14eb5d90 | 1923 | start_time = io_req->start_time; |
5df6d737 AJ |
1924 | fnic_release_ioreq_buf(fnic, io_req, sc); |
1925 | mempool_free(io_req, fnic->io_req_pool); | |
1926 | ||
1927 | fnic_abort_cmd_end: | |
4d7007b4 HP |
1928 | FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, |
1929 | sc->request->tag, sc, | |
1930 | jiffies_to_msecs(jiffies - start_time), | |
1931 | 0, ((u64)sc->cmnd[0] << 32 | | |
1932 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
1933 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
1934 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
1935 | ||
5df6d737 | 1936 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
14eb5d90 | 1937 | "Returning from abort cmd type %x %s\n", task_req, |
5df6d737 AJ |
1938 | (ret == SUCCESS) ? |
1939 | "SUCCESS" : "FAILED"); | |
1940 | return ret; | |
1941 | } | |
1942 | ||
1943 | static inline int fnic_queue_dr_io_req(struct fnic *fnic, | |
1944 | struct scsi_cmnd *sc, | |
1945 | struct fnic_io_req *io_req) | |
1946 | { | |
1947 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
03298552 | 1948 | struct Scsi_Host *host = fnic->lport->host; |
67125b02 | 1949 | struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; |
5df6d737 AJ |
1950 | struct scsi_lun fc_lun; |
1951 | int ret = 0; | |
1952 | unsigned long intr_flags; | |
1953 | ||
03298552 HP |
1954 | spin_lock_irqsave(host->host_lock, intr_flags); |
1955 | if (unlikely(fnic_chk_state_flags_locked(fnic, | |
1956 | FNIC_FLAGS_IO_BLOCKED))) { | |
1957 | spin_unlock_irqrestore(host->host_lock, intr_flags); | |
1958 | return FAILED; | |
1959 | } else | |
1960 | atomic_inc(&fnic->in_flight); | |
1961 | spin_unlock_irqrestore(host->host_lock, intr_flags); | |
1962 | ||
5df6d737 AJ |
1963 | spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); |
1964 | ||
1965 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
1966 | free_wq_copy_descs(fnic, wq); | |
1967 | ||
1968 | if (!vnic_wq_copy_desc_avail(wq)) { | |
14eb5d90 HP |
1969 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
1970 | "queue_dr_io_req failure - no descriptors\n"); | |
67125b02 | 1971 | atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); |
5df6d737 AJ |
1972 | ret = -EAGAIN; |
1973 | goto lr_io_req_end; | |
1974 | } | |
1975 | ||
1976 | /* fill in the lun info */ | |
1977 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1978 | ||
1979 | fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, | |
1980 | 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, | |
1981 | fc_lun.scsi_lun, io_req->port_id, | |
1982 | fnic->config.ra_tov, fnic->config.ed_tov); | |
1983 | ||
67125b02 HP |
1984 | atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); |
1985 | if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > | |
1986 | atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) | |
1987 | atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, | |
1988 | atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); | |
1989 | ||
5df6d737 AJ |
1990 | lr_io_req_end: |
1991 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
03298552 | 1992 | atomic_dec(&fnic->in_flight); |
5df6d737 AJ |
1993 | |
1994 | return ret; | |
1995 | } | |
1996 | ||
1997 | /* | |
1998 | * Clean up any pending aborts on the lun | |
1999 | * For each outstanding IO on this lun, whose abort is not completed by fw, | |
2000 | * issue a local abort. Wait for abort to complete. Return 0 if all commands | |
2001 | * successfully aborted, 1 otherwise | |
2002 | */ | |
2003 | static int fnic_clean_pending_aborts(struct fnic *fnic, | |
2004 | struct scsi_cmnd *lr_sc) | |
2005 | { | |
a0bf1ca2 | 2006 | int tag, abt_tag; |
5df6d737 AJ |
2007 | struct fnic_io_req *io_req; |
2008 | spinlock_t *io_lock; | |
2009 | unsigned long flags; | |
2010 | int ret = 0; | |
2011 | struct scsi_cmnd *sc; | |
5df6d737 AJ |
2012 | struct scsi_lun fc_lun; |
2013 | struct scsi_device *lun_dev = lr_sc->device; | |
2014 | DECLARE_COMPLETION_ONSTACK(tm_done); | |
a0bf1ca2 | 2015 | enum fnic_ioreq_state old_ioreq_state; |
5df6d737 | 2016 | |
fc85799e | 2017 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
1259c5dc SB |
2018 | io_lock = fnic_io_lock_tag(fnic, tag); |
2019 | spin_lock_irqsave(io_lock, flags); | |
5df6d737 AJ |
2020 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
2021 | /* | |
2022 | * ignore this lun reset cmd or cmds that do not belong to | |
2023 | * this lun | |
2024 | */ | |
1259c5dc SB |
2025 | if (!sc || sc == lr_sc || sc->device != lun_dev) { |
2026 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 2027 | continue; |
1259c5dc | 2028 | } |
5df6d737 AJ |
2029 | |
2030 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2031 | ||
2032 | if (!io_req || sc->device != lun_dev) { | |
2033 | spin_unlock_irqrestore(io_lock, flags); | |
2034 | continue; | |
2035 | } | |
2036 | ||
2037 | /* | |
2038 | * Found IO that is still pending with firmware and | |
2039 | * belongs to the LUN that we are resetting | |
2040 | */ | |
2041 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2042 | "Found IO in %s on lun\n", | |
2043 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
2044 | ||
a0bf1ca2 HP |
2045 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { |
2046 | spin_unlock_irqrestore(io_lock, flags); | |
2047 | continue; | |
2048 | } | |
2049 | if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && | |
14eb5d90 | 2050 | (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { |
a0bf1ca2 HP |
2051 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, |
2052 | "%s dev rst not pending sc 0x%p\n", __func__, | |
2053 | sc); | |
2054 | spin_unlock_irqrestore(io_lock, flags); | |
2055 | continue; | |
2056 | } | |
1259c5dc SB |
2057 | |
2058 | if (io_req->abts_done) | |
2059 | shost_printk(KERN_ERR, fnic->lport->host, | |
2060 | "%s: io_req->abts_done is set state is %s\n", | |
2061 | __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
a0bf1ca2 HP |
2062 | old_ioreq_state = CMD_STATE(sc); |
2063 | /* | |
2064 | * Any pending IO issued prior to reset is expected to be | |
2065 | * in abts pending state, if not we need to set | |
2066 | * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. | |
2067 | * When IO is completed, the IO will be handed over and | |
2068 | * handled in this function. | |
2069 | */ | |
2070 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
2071 | ||
a0bf1ca2 HP |
2072 | BUG_ON(io_req->abts_done); |
2073 | ||
2074 | abt_tag = tag; | |
2075 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { | |
2076 | abt_tag |= FNIC_TAG_DEV_RST; | |
2077 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
2078 | "%s: dev rst sc 0x%p\n", __func__, sc); | |
2079 | } | |
5df6d737 AJ |
2080 | |
2081 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
2082 | io_req->abts_done = &tm_done; | |
2083 | spin_unlock_irqrestore(io_lock, flags); | |
2084 | ||
2085 | /* Now queue the abort command to firmware */ | |
2086 | int_to_scsilun(sc->device->lun, &fc_lun); | |
5df6d737 | 2087 | |
a0bf1ca2 | 2088 | if (fnic_queue_abort_io_req(fnic, abt_tag, |
5df6d737 AJ |
2089 | FCPIO_ITMF_ABT_TASK_TERM, |
2090 | fc_lun.scsi_lun, io_req)) { | |
2091 | spin_lock_irqsave(io_lock, flags); | |
2092 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2093 | if (io_req) | |
2094 | io_req->abts_done = NULL; | |
a0bf1ca2 HP |
2095 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) |
2096 | CMD_STATE(sc) = old_ioreq_state; | |
5df6d737 AJ |
2097 | spin_unlock_irqrestore(io_lock, flags); |
2098 | ret = 1; | |
2099 | goto clean_pending_aborts_end; | |
a0bf1ca2 HP |
2100 | } else { |
2101 | spin_lock_irqsave(io_lock, flags); | |
2102 | if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) | |
2103 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
2104 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 | 2105 | } |
14eb5d90 | 2106 | CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; |
5df6d737 AJ |
2107 | |
2108 | wait_for_completion_timeout(&tm_done, | |
2109 | msecs_to_jiffies | |
2110 | (fnic->config.ed_tov)); | |
2111 | ||
2112 | /* Recheck cmd state to check if it is now aborted */ | |
2113 | spin_lock_irqsave(io_lock, flags); | |
2114 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2115 | if (!io_req) { | |
2116 | spin_unlock_irqrestore(io_lock, flags); | |
14eb5d90 | 2117 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; |
a0bf1ca2 | 2118 | continue; |
5df6d737 AJ |
2119 | } |
2120 | ||
2121 | io_req->abts_done = NULL; | |
2122 | ||
2123 | /* if abort is still pending with fw, fail */ | |
1259c5dc | 2124 | if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { |
5df6d737 | 2125 | spin_unlock_irqrestore(io_lock, flags); |
14eb5d90 | 2126 | CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; |
5df6d737 AJ |
2127 | ret = 1; |
2128 | goto clean_pending_aborts_end; | |
2129 | } | |
1259c5dc | 2130 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; |
5df6d737 AJ |
2131 | CMD_SP(sc) = NULL; |
2132 | spin_unlock_irqrestore(io_lock, flags); | |
2133 | ||
2134 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
2135 | mempool_free(io_req, fnic->io_req_pool); | |
2136 | } | |
2137 | ||
a0bf1ca2 HP |
2138 | schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); |
2139 | ||
2140 | /* walk again to check, if IOs are still pending in fw */ | |
2141 | if (fnic_is_abts_pending(fnic, lr_sc)) | |
2142 | ret = FAILED; | |
2143 | ||
5df6d737 AJ |
2144 | clean_pending_aborts_end: |
2145 | return ret; | |
2146 | } | |
2147 | ||
03298552 HP |
2148 | /** |
2149 | * fnic_scsi_host_start_tag | |
2150 | * Allocates tagid from host's tag list | |
2151 | **/ | |
2152 | static inline int | |
2153 | fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) | |
2154 | { | |
2155 | struct blk_queue_tag *bqt = fnic->lport->host->bqt; | |
2156 | int tag, ret = SCSI_NO_TAG; | |
2157 | ||
2158 | BUG_ON(!bqt); | |
2159 | if (!bqt) { | |
2160 | pr_err("Tags are not supported\n"); | |
2161 | goto end; | |
2162 | } | |
2163 | ||
2164 | do { | |
2165 | tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1); | |
2166 | if (tag >= bqt->max_depth) { | |
2167 | pr_err("Tag allocation failure\n"); | |
2168 | goto end; | |
2169 | } | |
2170 | } while (test_and_set_bit(tag, bqt->tag_map)); | |
2171 | ||
2172 | bqt->tag_index[tag] = sc->request; | |
2173 | sc->request->tag = tag; | |
2174 | sc->tag = tag; | |
2175 | if (!sc->request->special) | |
2176 | sc->request->special = sc; | |
2177 | ||
2178 | ret = tag; | |
2179 | ||
2180 | end: | |
2181 | return ret; | |
2182 | } | |
2183 | ||
2184 | /** | |
2185 | * fnic_scsi_host_end_tag | |
2186 | * frees tag allocated by fnic_scsi_host_start_tag. | |
2187 | **/ | |
2188 | static inline void | |
2189 | fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) | |
2190 | { | |
2191 | struct blk_queue_tag *bqt = fnic->lport->host->bqt; | |
2192 | int tag = sc->request->tag; | |
2193 | ||
2194 | if (tag == SCSI_NO_TAG) | |
2195 | return; | |
2196 | ||
2197 | BUG_ON(!bqt || !bqt->tag_index[tag]); | |
2198 | if (!bqt) | |
2199 | return; | |
2200 | ||
2201 | bqt->tag_index[tag] = NULL; | |
2202 | clear_bit(tag, bqt->tag_map); | |
2203 | ||
2204 | return; | |
2205 | } | |
2206 | ||
5df6d737 AJ |
2207 | /* |
2208 | * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN | |
2209 | * fail to get aborted. It calls driver's eh_device_reset with a SCSI command | |
2210 | * on the LUN. | |
2211 | */ | |
2212 | int fnic_device_reset(struct scsi_cmnd *sc) | |
2213 | { | |
2214 | struct fc_lport *lp; | |
2215 | struct fnic *fnic; | |
4d7007b4 | 2216 | struct fnic_io_req *io_req = NULL; |
5df6d737 AJ |
2217 | struct fc_rport *rport; |
2218 | int status; | |
2219 | int ret = FAILED; | |
2220 | spinlock_t *io_lock; | |
2221 | unsigned long flags; | |
14eb5d90 | 2222 | unsigned long start_time = 0; |
03298552 | 2223 | struct scsi_lun fc_lun; |
67125b02 HP |
2224 | struct fnic_stats *fnic_stats; |
2225 | struct reset_stats *reset_stats; | |
4d7007b4 | 2226 | int tag = 0; |
5df6d737 | 2227 | DECLARE_COMPLETION_ONSTACK(tm_done); |
03298552 | 2228 | int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ |
5df6d737 AJ |
2229 | |
2230 | /* Wait for rport to unblock */ | |
65d430fa | 2231 | fc_block_scsi_eh(sc); |
5df6d737 AJ |
2232 | |
2233 | /* Get local-port, check ready and link up */ | |
2234 | lp = shost_priv(sc->device->host); | |
2235 | ||
2236 | fnic = lport_priv(lp); | |
67125b02 HP |
2237 | fnic_stats = &fnic->fnic_stats; |
2238 | reset_stats = &fnic->fnic_stats.reset_stats; | |
2239 | ||
2240 | atomic64_inc(&reset_stats->device_resets); | |
5df6d737 | 2241 | |
0db6f435 RK |
2242 | rport = starget_to_rport(scsi_target(sc->device)); |
2243 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
9cb78c16 | 2244 | "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", |
03298552 | 2245 | rport->port_id, sc->device->lun, sc); |
5df6d737 AJ |
2246 | |
2247 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) | |
2248 | goto fnic_device_reset_end; | |
2249 | ||
2250 | /* Check if remote port up */ | |
67125b02 HP |
2251 | if (fc_remote_port_chkready(rport)) { |
2252 | atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); | |
5df6d737 | 2253 | goto fnic_device_reset_end; |
67125b02 | 2254 | } |
5df6d737 | 2255 | |
14eb5d90 | 2256 | CMD_FLAGS(sc) = FNIC_DEVICE_RESET; |
03298552 HP |
2257 | /* Allocate tag if not present */ |
2258 | ||
2259 | tag = sc->request->tag; | |
2260 | if (unlikely(tag < 0)) { | |
4d637168 CH |
2261 | /* |
2262 | * XXX(hch): current the midlayer fakes up a struct | |
2263 | * request for the explicit reset ioctls, and those | |
2264 | * don't have a tag allocated to them. The below | |
2265 | * code pokes into midlayer structures to paper over | |
2266 | * this design issue, but that won't work for blk-mq. | |
2267 | * | |
2268 | * Either someone who can actually test the hardware | |
2269 | * will have to come up with a similar hack for the | |
2270 | * blk-mq case, or we'll have to bite the bullet and | |
2271 | * fix the way the EH ioctls work for real, but until | |
2272 | * that happens we fail these explicit requests here. | |
2273 | */ | |
2274 | if (shost_use_blk_mq(sc->device->host)) | |
2275 | goto fnic_device_reset_end; | |
2276 | ||
03298552 HP |
2277 | tag = fnic_scsi_host_start_tag(fnic, sc); |
2278 | if (unlikely(tag == SCSI_NO_TAG)) | |
2279 | goto fnic_device_reset_end; | |
2280 | tag_gen_flag = 1; | |
2281 | } | |
5df6d737 AJ |
2282 | io_lock = fnic_io_lock_hash(fnic, sc); |
2283 | spin_lock_irqsave(io_lock, flags); | |
2284 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2285 | ||
2286 | /* | |
2287 | * If there is a io_req attached to this command, then use it, | |
2288 | * else allocate a new one. | |
2289 | */ | |
2290 | if (!io_req) { | |
2291 | io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); | |
2292 | if (!io_req) { | |
2293 | spin_unlock_irqrestore(io_lock, flags); | |
2294 | goto fnic_device_reset_end; | |
2295 | } | |
2296 | memset(io_req, 0, sizeof(*io_req)); | |
2297 | io_req->port_id = rport->port_id; | |
2298 | CMD_SP(sc) = (char *)io_req; | |
2299 | } | |
2300 | io_req->dr_done = &tm_done; | |
2301 | CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; | |
2302 | CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; | |
2303 | spin_unlock_irqrestore(io_lock, flags); | |
2304 | ||
03298552 | 2305 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); |
5df6d737 AJ |
2306 | |
2307 | /* | |
2308 | * issue the device reset, if enqueue failed, clean up the ioreq | |
2309 | * and break assoc with scsi cmd | |
2310 | */ | |
2311 | if (fnic_queue_dr_io_req(fnic, sc, io_req)) { | |
2312 | spin_lock_irqsave(io_lock, flags); | |
2313 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2314 | if (io_req) | |
2315 | io_req->dr_done = NULL; | |
2316 | goto fnic_device_reset_clean; | |
2317 | } | |
03298552 | 2318 | spin_lock_irqsave(io_lock, flags); |
14eb5d90 | 2319 | CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; |
03298552 | 2320 | spin_unlock_irqrestore(io_lock, flags); |
5df6d737 AJ |
2321 | |
2322 | /* | |
2323 | * Wait on the local completion for LUN reset. The io_req may be | |
2324 | * freed while we wait since we hold no lock. | |
2325 | */ | |
2326 | wait_for_completion_timeout(&tm_done, | |
2327 | msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); | |
2328 | ||
2329 | spin_lock_irqsave(io_lock, flags); | |
2330 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2331 | if (!io_req) { | |
2332 | spin_unlock_irqrestore(io_lock, flags); | |
03298552 HP |
2333 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
2334 | "io_req is null tag 0x%x sc 0x%p\n", tag, sc); | |
5df6d737 AJ |
2335 | goto fnic_device_reset_end; |
2336 | } | |
2337 | io_req->dr_done = NULL; | |
2338 | ||
2339 | status = CMD_LR_STATUS(sc); | |
5df6d737 AJ |
2340 | |
2341 | /* | |
2342 | * If lun reset not completed, bail out with failed. io_req | |
2343 | * gets cleaned up during higher levels of EH | |
2344 | */ | |
2345 | if (status == FCPIO_INVALID_CODE) { | |
67125b02 | 2346 | atomic64_inc(&reset_stats->device_reset_timeouts); |
5df6d737 AJ |
2347 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
2348 | "Device reset timed out\n"); | |
03298552 HP |
2349 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; |
2350 | spin_unlock_irqrestore(io_lock, flags); | |
2351 | int_to_scsilun(sc->device->lun, &fc_lun); | |
2352 | /* | |
1259c5dc SB |
2353 | * Issue abort and terminate on device reset request. |
2354 | * If q'ing of terminate fails, retry it after a delay. | |
03298552 HP |
2355 | */ |
2356 | while (1) { | |
2357 | spin_lock_irqsave(io_lock, flags); | |
2358 | if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { | |
2359 | spin_unlock_irqrestore(io_lock, flags); | |
2360 | break; | |
2361 | } | |
2362 | spin_unlock_irqrestore(io_lock, flags); | |
2363 | if (fnic_queue_abort_io_req(fnic, | |
2364 | tag | FNIC_TAG_DEV_RST, | |
2365 | FCPIO_ITMF_ABT_TASK_TERM, | |
2366 | fc_lun.scsi_lun, io_req)) { | |
2367 | wait_for_completion_timeout(&tm_done, | |
2368 | msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); | |
2369 | } else { | |
2370 | spin_lock_irqsave(io_lock, flags); | |
2371 | CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; | |
2372 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
2373 | io_req->abts_done = &tm_done; | |
2374 | spin_unlock_irqrestore(io_lock, flags); | |
2375 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2376 | "Abort and terminate issued on Device reset " | |
2377 | "tag 0x%x sc 0x%p\n", tag, sc); | |
2378 | break; | |
2379 | } | |
2380 | } | |
2381 | while (1) { | |
2382 | spin_lock_irqsave(io_lock, flags); | |
2383 | if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { | |
2384 | spin_unlock_irqrestore(io_lock, flags); | |
2385 | wait_for_completion_timeout(&tm_done, | |
2386 | msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); | |
2387 | break; | |
2388 | } else { | |
2389 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2390 | io_req->abts_done = NULL; | |
2391 | goto fnic_device_reset_clean; | |
2392 | } | |
2393 | } | |
2394 | } else { | |
2395 | spin_unlock_irqrestore(io_lock, flags); | |
5df6d737 AJ |
2396 | } |
2397 | ||
2398 | /* Completed, but not successful, clean up the io_req, return fail */ | |
2399 | if (status != FCPIO_SUCCESS) { | |
2400 | spin_lock_irqsave(io_lock, flags); | |
2401 | FNIC_SCSI_DBG(KERN_DEBUG, | |
2402 | fnic->lport->host, | |
2403 | "Device reset completed - failed\n"); | |
2404 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2405 | goto fnic_device_reset_clean; | |
2406 | } | |
2407 | ||
2408 | /* | |
2409 | * Clean up any aborts on this lun that have still not | |
2410 | * completed. If any of these fail, then LUN reset fails. | |
2411 | * clean_pending_aborts cleans all cmds on this lun except | |
2412 | * the lun reset cmd. If all cmds get cleaned, the lun reset | |
2413 | * succeeds | |
2414 | */ | |
2415 | if (fnic_clean_pending_aborts(fnic, sc)) { | |
2416 | spin_lock_irqsave(io_lock, flags); | |
2417 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2418 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2419 | "Device reset failed" | |
2420 | " since could not abort all IOs\n"); | |
2421 | goto fnic_device_reset_clean; | |
2422 | } | |
2423 | ||
2424 | /* Clean lun reset command */ | |
2425 | spin_lock_irqsave(io_lock, flags); | |
2426 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2427 | if (io_req) | |
2428 | /* Completed, and successful */ | |
2429 | ret = SUCCESS; | |
2430 | ||
2431 | fnic_device_reset_clean: | |
2432 | if (io_req) | |
2433 | CMD_SP(sc) = NULL; | |
2434 | ||
2435 | spin_unlock_irqrestore(io_lock, flags); | |
2436 | ||
2437 | if (io_req) { | |
14eb5d90 | 2438 | start_time = io_req->start_time; |
5df6d737 AJ |
2439 | fnic_release_ioreq_buf(fnic, io_req, sc); |
2440 | mempool_free(io_req, fnic->io_req_pool); | |
2441 | } | |
2442 | ||
2443 | fnic_device_reset_end: | |
4d7007b4 HP |
2444 | FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, |
2445 | sc->request->tag, sc, | |
2446 | jiffies_to_msecs(jiffies - start_time), | |
2447 | 0, ((u64)sc->cmnd[0] << 32 | | |
2448 | (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | | |
2449 | (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), | |
2450 | (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); | |
2451 | ||
03298552 HP |
2452 | /* free tag if it is allocated */ |
2453 | if (unlikely(tag_gen_flag)) | |
2454 | fnic_scsi_host_end_tag(fnic, sc); | |
2455 | ||
5df6d737 AJ |
2456 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, |
2457 | "Returning from device reset %s\n", | |
2458 | (ret == SUCCESS) ? | |
2459 | "SUCCESS" : "FAILED"); | |
67125b02 HP |
2460 | |
2461 | if (ret == FAILED) | |
2462 | atomic64_inc(&reset_stats->device_reset_failures); | |
2463 | ||
5df6d737 AJ |
2464 | return ret; |
2465 | } | |
2466 | ||
2467 | /* Clean up all IOs, clean up libFC local port */ | |
2468 | int fnic_reset(struct Scsi_Host *shost) | |
2469 | { | |
2470 | struct fc_lport *lp; | |
2471 | struct fnic *fnic; | |
441fbd25 | 2472 | int ret = 0; |
67125b02 | 2473 | struct reset_stats *reset_stats; |
5df6d737 AJ |
2474 | |
2475 | lp = shost_priv(shost); | |
2476 | fnic = lport_priv(lp); | |
67125b02 | 2477 | reset_stats = &fnic->fnic_stats.reset_stats; |
5df6d737 AJ |
2478 | |
2479 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2480 | "fnic_reset called\n"); | |
2481 | ||
67125b02 HP |
2482 | atomic64_inc(&reset_stats->fnic_resets); |
2483 | ||
5df6d737 AJ |
2484 | /* |
2485 | * Reset local port, this will clean up libFC exchanges, | |
2486 | * reset remote port sessions, and if link is up, begin flogi | |
2487 | */ | |
441fbd25 | 2488 | ret = lp->tt.lport_reset(lp); |
5df6d737 AJ |
2489 | |
2490 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2491 | "Returning from fnic reset %s\n", | |
441fbd25 | 2492 | (ret == 0) ? |
5df6d737 AJ |
2493 | "SUCCESS" : "FAILED"); |
2494 | ||
67125b02 HP |
2495 | if (ret == 0) |
2496 | atomic64_inc(&reset_stats->fnic_reset_completions); | |
2497 | else | |
2498 | atomic64_inc(&reset_stats->fnic_reset_failures); | |
2499 | ||
5df6d737 AJ |
2500 | return ret; |
2501 | } | |
2502 | ||
2503 | /* | |
2504 | * SCSI Error handling calls driver's eh_host_reset if all prior | |
2505 | * error handling levels return FAILED. If host reset completes | |
2506 | * successfully, and if link is up, then Fabric login begins. | |
2507 | * | |
2508 | * Host Reset is the highest level of error recovery. If this fails, then | |
2509 | * host is offlined by SCSI. | |
2510 | * | |
2511 | */ | |
2512 | int fnic_host_reset(struct scsi_cmnd *sc) | |
2513 | { | |
2514 | int ret; | |
2515 | unsigned long wait_host_tmo; | |
2516 | struct Scsi_Host *shost = sc->device->host; | |
2517 | struct fc_lport *lp = shost_priv(shost); | |
2518 | ||
2519 | /* | |
2520 | * If fnic_reset is successful, wait for fabric login to complete | |
2521 | * scsi-ml tries to send a TUR to every device if host reset is | |
2522 | * successful, so before returning to scsi, fabric should be up | |
2523 | */ | |
441fbd25 | 2524 | ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; |
5df6d737 AJ |
2525 | if (ret == SUCCESS) { |
2526 | wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; | |
2527 | ret = FAILED; | |
2528 | while (time_before(jiffies, wait_host_tmo)) { | |
2529 | if ((lp->state == LPORT_ST_READY) && | |
2530 | (lp->link_up)) { | |
2531 | ret = SUCCESS; | |
2532 | break; | |
2533 | } | |
2534 | ssleep(1); | |
2535 | } | |
2536 | } | |
2537 | ||
2538 | return ret; | |
2539 | } | |
2540 | ||
2541 | /* | |
2542 | * This fxn is called from libFC when host is removed | |
2543 | */ | |
2544 | void fnic_scsi_abort_io(struct fc_lport *lp) | |
2545 | { | |
2546 | int err = 0; | |
2547 | unsigned long flags; | |
2548 | enum fnic_state old_state; | |
2549 | struct fnic *fnic = lport_priv(lp); | |
2550 | DECLARE_COMPLETION_ONSTACK(remove_wait); | |
2551 | ||
2552 | /* Issue firmware reset for fnic, wait for reset to complete */ | |
03298552 | 2553 | retry_fw_reset: |
5df6d737 | 2554 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
03298552 HP |
2555 | if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { |
2556 | /* fw reset is in progress, poll for its completion */ | |
2557 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2558 | schedule_timeout(msecs_to_jiffies(100)); | |
2559 | goto retry_fw_reset; | |
2560 | } | |
2561 | ||
5df6d737 AJ |
2562 | fnic->remove_wait = &remove_wait; |
2563 | old_state = fnic->state; | |
2564 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
78112e55 | 2565 | fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); |
5df6d737 AJ |
2566 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
2567 | ||
2568 | err = fnic_fw_reset_handler(fnic); | |
2569 | if (err) { | |
2570 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
2571 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) | |
2572 | fnic->state = old_state; | |
2573 | fnic->remove_wait = NULL; | |
2574 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2575 | return; | |
2576 | } | |
2577 | ||
2578 | /* Wait for firmware reset to complete */ | |
2579 | wait_for_completion_timeout(&remove_wait, | |
2580 | msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); | |
2581 | ||
2582 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
2583 | fnic->remove_wait = NULL; | |
2584 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
2585 | "fnic_scsi_abort_io %s\n", | |
2586 | (fnic->state == FNIC_IN_ETH_MODE) ? | |
2587 | "SUCCESS" : "FAILED"); | |
2588 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2589 | ||
2590 | } | |
2591 | ||
2592 | /* | |
2593 | * This fxn called from libFC to clean up driver IO state on link down | |
2594 | */ | |
2595 | void fnic_scsi_cleanup(struct fc_lport *lp) | |
2596 | { | |
2597 | unsigned long flags; | |
2598 | enum fnic_state old_state; | |
2599 | struct fnic *fnic = lport_priv(lp); | |
2600 | ||
2601 | /* issue fw reset */ | |
03298552 | 2602 | retry_fw_reset: |
5df6d737 | 2603 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
03298552 HP |
2604 | if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { |
2605 | /* fw reset is in progress, poll for its completion */ | |
2606 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2607 | schedule_timeout(msecs_to_jiffies(100)); | |
2608 | goto retry_fw_reset; | |
2609 | } | |
5df6d737 AJ |
2610 | old_state = fnic->state; |
2611 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
78112e55 | 2612 | fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); |
5df6d737 AJ |
2613 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
2614 | ||
2615 | if (fnic_fw_reset_handler(fnic)) { | |
2616 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
2617 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) | |
2618 | fnic->state = old_state; | |
2619 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
2620 | } | |
2621 | ||
2622 | } | |
2623 | ||
2624 | void fnic_empty_scsi_cleanup(struct fc_lport *lp) | |
2625 | { | |
2626 | } | |
2627 | ||
2628 | void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) | |
2629 | { | |
2630 | struct fnic *fnic = lport_priv(lp); | |
2631 | ||
2632 | /* Non-zero sid, nothing to do */ | |
2633 | if (sid) | |
2634 | goto call_fc_exch_mgr_reset; | |
2635 | ||
2636 | if (did) { | |
2637 | fnic_rport_exch_reset(fnic, did); | |
2638 | goto call_fc_exch_mgr_reset; | |
2639 | } | |
2640 | ||
2641 | /* | |
2642 | * sid = 0, did = 0 | |
2643 | * link down or device being removed | |
2644 | */ | |
2645 | if (!fnic->in_remove) | |
2646 | fnic_scsi_cleanup(lp); | |
2647 | else | |
2648 | fnic_scsi_abort_io(lp); | |
2649 | ||
2650 | /* call libFC exch mgr reset to reset its exchanges */ | |
2651 | call_fc_exch_mgr_reset: | |
2652 | fc_exch_mgr_reset(lp, sid, did); | |
2653 | ||
2654 | } | |
a0bf1ca2 HP |
2655 | |
2656 | /* | |
2657 | * fnic_is_abts_pending() is a helper function that | |
2658 | * walks through tag map to check if there is any IOs pending,if there is one, | |
2659 | * then it returns 1 (true), otherwise 0 (false) | |
2660 | * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, | |
2661 | * otherwise, it checks for all IOs. | |
2662 | */ | |
2663 | int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) | |
2664 | { | |
2665 | int tag; | |
2666 | struct fnic_io_req *io_req; | |
2667 | spinlock_t *io_lock; | |
2668 | unsigned long flags; | |
2669 | int ret = 0; | |
2670 | struct scsi_cmnd *sc; | |
2671 | struct scsi_device *lun_dev = NULL; | |
2672 | ||
2673 | if (lr_sc) | |
2674 | lun_dev = lr_sc->device; | |
2675 | ||
2676 | /* walk again to check, if IOs are still pending in fw */ | |
fc85799e | 2677 | for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { |
a0bf1ca2 HP |
2678 | sc = scsi_host_find_tag(fnic->lport->host, tag); |
2679 | /* | |
2680 | * ignore this lun reset cmd or cmds that do not belong to | |
2681 | * this lun | |
2682 | */ | |
2683 | if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) | |
2684 | continue; | |
2685 | ||
2686 | io_lock = fnic_io_lock_hash(fnic, sc); | |
2687 | spin_lock_irqsave(io_lock, flags); | |
2688 | ||
2689 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
2690 | ||
2691 | if (!io_req || sc->device != lun_dev) { | |
2692 | spin_unlock_irqrestore(io_lock, flags); | |
2693 | continue; | |
2694 | } | |
2695 | ||
2696 | /* | |
2697 | * Found IO that is still pending with firmware and | |
2698 | * belongs to the LUN that we are resetting | |
2699 | */ | |
2700 | FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, | |
2701 | "Found IO in %s on lun\n", | |
2702 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
2703 | ||
5d65f918 | 2704 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) |
a0bf1ca2 | 2705 | ret = 1; |
5d65f918 | 2706 | spin_unlock_irqrestore(io_lock, flags); |
a0bf1ca2 HP |
2707 | } |
2708 | ||
2709 | return ret; | |
2710 | } |