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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[] = { | |
50 | [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", | |
51 | [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", | |
52 | [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", | |
53 | [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", | |
54 | }; | |
55 | ||
56 | static const char *fcpio_status_str[] = { | |
57 | [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ | |
58 | [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", | |
59 | [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", | |
60 | [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", | |
61 | [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", | |
62 | [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", | |
63 | [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ | |
64 | [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", | |
65 | [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", | |
66 | [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", | |
67 | [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", | |
68 | [FCPIO_FW_ERR] = "FCPIO_FW_ERR", | |
69 | [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", | |
70 | [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", | |
71 | [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", | |
72 | [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", | |
73 | [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", | |
74 | [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", | |
75 | [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", | |
76 | }; | |
77 | ||
78 | const char *fnic_state_to_str(unsigned int state) | |
79 | { | |
80 | if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) | |
81 | return "unknown"; | |
82 | ||
83 | return fnic_state_str[state]; | |
84 | } | |
85 | ||
86 | static const char *fnic_ioreq_state_to_str(unsigned int state) | |
87 | { | |
88 | if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || | |
89 | !fnic_ioreq_state_str[state]) | |
90 | return "unknown"; | |
91 | ||
92 | return fnic_ioreq_state_str[state]; | |
93 | } | |
94 | ||
95 | static const char *fnic_fcpio_status_to_str(unsigned int status) | |
96 | { | |
97 | if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) | |
98 | return "unknown"; | |
99 | ||
100 | return fcpio_status_str[status]; | |
101 | } | |
102 | ||
103 | static void fnic_cleanup_io(struct fnic *fnic, int exclude_id); | |
104 | ||
105 | static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic, | |
106 | struct scsi_cmnd *sc) | |
107 | { | |
108 | u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1); | |
109 | ||
110 | return &fnic->io_req_lock[hash]; | |
111 | } | |
112 | ||
113 | /* | |
114 | * Unmap the data buffer and sense buffer for an io_req, | |
115 | * also unmap and free the device-private scatter/gather list. | |
116 | */ | |
117 | static void fnic_release_ioreq_buf(struct fnic *fnic, | |
118 | struct fnic_io_req *io_req, | |
119 | struct scsi_cmnd *sc) | |
120 | { | |
121 | if (io_req->sgl_list_pa) | |
122 | pci_unmap_single(fnic->pdev, io_req->sgl_list_pa, | |
123 | sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, | |
124 | PCI_DMA_TODEVICE); | |
125 | scsi_dma_unmap(sc); | |
126 | ||
127 | if (io_req->sgl_cnt) | |
128 | mempool_free(io_req->sgl_list_alloc, | |
129 | fnic->io_sgl_pool[io_req->sgl_type]); | |
130 | if (io_req->sense_buf_pa) | |
131 | pci_unmap_single(fnic->pdev, io_req->sense_buf_pa, | |
132 | SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); | |
133 | } | |
134 | ||
135 | /* Free up Copy Wq descriptors. Called with copy_wq lock held */ | |
136 | static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) | |
137 | { | |
138 | /* if no Ack received from firmware, then nothing to clean */ | |
139 | if (!fnic->fw_ack_recd[0]) | |
140 | return 1; | |
141 | ||
142 | /* | |
143 | * Update desc_available count based on number of freed descriptors | |
144 | * Account for wraparound | |
145 | */ | |
146 | if (wq->to_clean_index <= fnic->fw_ack_index[0]) | |
147 | wq->ring.desc_avail += (fnic->fw_ack_index[0] | |
148 | - wq->to_clean_index + 1); | |
149 | else | |
150 | wq->ring.desc_avail += (wq->ring.desc_count | |
151 | - wq->to_clean_index | |
152 | + fnic->fw_ack_index[0] + 1); | |
153 | ||
154 | /* | |
155 | * just bump clean index to ack_index+1 accounting for wraparound | |
156 | * this will essentially free up all descriptors between | |
157 | * to_clean_index and fw_ack_index, both inclusive | |
158 | */ | |
159 | wq->to_clean_index = | |
160 | (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; | |
161 | ||
162 | /* we have processed the acks received so far */ | |
163 | fnic->fw_ack_recd[0] = 0; | |
164 | return 0; | |
165 | } | |
166 | ||
167 | ||
168 | /* | |
169 | * fnic_fw_reset_handler | |
170 | * Routine to send reset msg to fw | |
171 | */ | |
172 | int fnic_fw_reset_handler(struct fnic *fnic) | |
173 | { | |
174 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
175 | int ret = 0; | |
176 | unsigned long flags; | |
177 | ||
78112e55 JE |
178 | skb_queue_purge(&fnic->frame_queue); |
179 | skb_queue_purge(&fnic->tx_queue); | |
180 | ||
5df6d737 AJ |
181 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); |
182 | ||
183 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
184 | free_wq_copy_descs(fnic, wq); | |
185 | ||
186 | if (!vnic_wq_copy_desc_avail(wq)) | |
187 | ret = -EAGAIN; | |
188 | else | |
189 | fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); | |
190 | ||
191 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
192 | ||
193 | if (!ret) | |
194 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
195 | "Issued fw reset\n"); | |
196 | else | |
197 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
198 | "Failed to issue fw reset\n"); | |
199 | return ret; | |
200 | } | |
201 | ||
202 | ||
203 | /* | |
204 | * fnic_flogi_reg_handler | |
205 | * Routine to send flogi register msg to fw | |
206 | */ | |
78112e55 | 207 | int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) |
5df6d737 AJ |
208 | { |
209 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
78112e55 JE |
210 | enum fcpio_flogi_reg_format_type format; |
211 | struct fc_lport *lp = fnic->lport; | |
5df6d737 AJ |
212 | u8 gw_mac[ETH_ALEN]; |
213 | int ret = 0; | |
214 | unsigned long flags; | |
215 | ||
216 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); | |
217 | ||
218 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
219 | free_wq_copy_descs(fnic, wq); | |
220 | ||
221 | if (!vnic_wq_copy_desc_avail(wq)) { | |
222 | ret = -EAGAIN; | |
223 | goto flogi_reg_ioreq_end; | |
224 | } | |
225 | ||
78112e55 | 226 | if (fnic->ctlr.map_dest) { |
5df6d737 | 227 | memset(gw_mac, 0xff, ETH_ALEN); |
78112e55 JE |
228 | format = FCPIO_FLOGI_REG_DEF_DEST; |
229 | } else { | |
230 | memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); | |
231 | format = FCPIO_FLOGI_REG_GW_DEST; | |
232 | } | |
5df6d737 | 233 | |
78112e55 JE |
234 | if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { |
235 | fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, | |
236 | fc_id, gw_mac, | |
237 | fnic->data_src_addr, | |
238 | lp->r_a_tov, lp->e_d_tov); | |
239 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
240 | "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", | |
241 | fc_id, fnic->data_src_addr, gw_mac); | |
242 | } else { | |
243 | fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, | |
244 | format, fc_id, gw_mac); | |
245 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
246 | "FLOGI reg issued fcid %x map %d dest %pM\n", | |
247 | fc_id, fnic->ctlr.map_dest, gw_mac); | |
248 | } | |
5df6d737 AJ |
249 | |
250 | flogi_reg_ioreq_end: | |
251 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
5df6d737 AJ |
252 | return ret; |
253 | } | |
254 | ||
255 | /* | |
256 | * fnic_queue_wq_copy_desc | |
257 | * Routine to enqueue a wq copy desc | |
258 | */ | |
259 | static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, | |
260 | struct vnic_wq_copy *wq, | |
261 | struct fnic_io_req *io_req, | |
262 | struct scsi_cmnd *sc, | |
87a2d34b | 263 | int sg_count) |
5df6d737 AJ |
264 | { |
265 | struct scatterlist *sg; | |
266 | struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); | |
267 | struct fc_rport_libfc_priv *rp = rport->dd_data; | |
268 | struct host_sg_desc *desc; | |
269 | u8 pri_tag = 0; | |
270 | unsigned int i; | |
271 | unsigned long intr_flags; | |
272 | int flags; | |
273 | u8 exch_flags; | |
274 | struct scsi_lun fc_lun; | |
275 | char msg[2]; | |
276 | ||
277 | if (sg_count) { | |
5df6d737 AJ |
278 | /* For each SGE, create a device desc entry */ |
279 | desc = io_req->sgl_list; | |
280 | for_each_sg(scsi_sglist(sc), sg, sg_count, i) { | |
281 | desc->addr = cpu_to_le64(sg_dma_address(sg)); | |
282 | desc->len = cpu_to_le32(sg_dma_len(sg)); | |
283 | desc->_resvd = 0; | |
284 | desc++; | |
285 | } | |
286 | ||
287 | io_req->sgl_list_pa = pci_map_single | |
288 | (fnic->pdev, | |
289 | io_req->sgl_list, | |
290 | sizeof(io_req->sgl_list[0]) * sg_count, | |
291 | PCI_DMA_TODEVICE); | |
292 | } | |
293 | ||
294 | io_req->sense_buf_pa = pci_map_single(fnic->pdev, | |
295 | sc->sense_buffer, | |
296 | SCSI_SENSE_BUFFERSIZE, | |
297 | PCI_DMA_FROMDEVICE); | |
298 | ||
299 | int_to_scsilun(sc->device->lun, &fc_lun); | |
300 | ||
301 | pri_tag = FCPIO_ICMND_PTA_SIMPLE; | |
302 | msg[0] = MSG_SIMPLE_TAG; | |
303 | scsi_populate_tag_msg(sc, msg); | |
304 | if (msg[0] == MSG_ORDERED_TAG) | |
305 | pri_tag = FCPIO_ICMND_PTA_ORDERED; | |
306 | ||
307 | /* Enqueue the descriptor in the Copy WQ */ | |
308 | spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); | |
309 | ||
310 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
311 | free_wq_copy_descs(fnic, wq); | |
312 | ||
313 | if (unlikely(!vnic_wq_copy_desc_avail(wq))) { | |
314 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
315 | return SCSI_MLQUEUE_HOST_BUSY; | |
316 | } | |
317 | ||
318 | flags = 0; | |
319 | if (sc->sc_data_direction == DMA_FROM_DEVICE) | |
320 | flags = FCPIO_ICMND_RDDATA; | |
321 | else if (sc->sc_data_direction == DMA_TO_DEVICE) | |
322 | flags = FCPIO_ICMND_WRDATA; | |
323 | ||
324 | exch_flags = 0; | |
325 | if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && | |
326 | (rp->flags & FC_RP_FLAGS_RETRY)) | |
327 | exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; | |
328 | ||
329 | fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, | |
330 | 0, exch_flags, io_req->sgl_cnt, | |
331 | SCSI_SENSE_BUFFERSIZE, | |
332 | io_req->sgl_list_pa, | |
333 | io_req->sense_buf_pa, | |
334 | 0, /* scsi cmd ref, always 0 */ | |
335 | pri_tag, /* scsi pri and tag */ | |
336 | flags, /* command flags */ | |
4b53662b AJ |
337 | sc->cmnd, sc->cmd_len, |
338 | scsi_bufflen(sc), | |
5df6d737 AJ |
339 | fc_lun.scsi_lun, io_req->port_id, |
340 | rport->maxframe_size, rp->r_a_tov, | |
341 | rp->e_d_tov); | |
342 | ||
343 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | /* | |
348 | * fnic_queuecommand | |
349 | * Routine to send a scsi cdb | |
350 | * Called with host_lock held and interrupts disabled. | |
351 | */ | |
f281233d | 352 | static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) |
5df6d737 AJ |
353 | { |
354 | struct fc_lport *lp; | |
355 | struct fc_rport *rport; | |
356 | struct fnic_io_req *io_req; | |
357 | struct fnic *fnic; | |
358 | struct vnic_wq_copy *wq; | |
359 | int ret; | |
87a2d34b | 360 | int sg_count; |
5df6d737 AJ |
361 | unsigned long flags; |
362 | unsigned long ptr; | |
363 | ||
364 | rport = starget_to_rport(scsi_target(sc->device)); | |
365 | ret = fc_remote_port_chkready(rport); | |
366 | if (ret) { | |
367 | sc->result = ret; | |
368 | done(sc); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | lp = shost_priv(sc->device->host); | |
373 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) | |
374 | return SCSI_MLQUEUE_HOST_BUSY; | |
375 | ||
376 | /* | |
377 | * Release host lock, use driver resource specific locks from here. | |
378 | * Don't re-enable interrupts in case they were disabled prior to the | |
379 | * caller disabling them. | |
380 | */ | |
381 | spin_unlock(lp->host->host_lock); | |
382 | ||
383 | /* Get a new io_req for this SCSI IO */ | |
384 | fnic = lport_priv(lp); | |
385 | ||
386 | io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); | |
387 | if (!io_req) { | |
388 | ret = SCSI_MLQUEUE_HOST_BUSY; | |
389 | goto out; | |
390 | } | |
391 | memset(io_req, 0, sizeof(*io_req)); | |
392 | ||
393 | /* Map the data buffer */ | |
394 | sg_count = scsi_dma_map(sc); | |
395 | if (sg_count < 0) { | |
396 | mempool_free(io_req, fnic->io_req_pool); | |
397 | goto out; | |
398 | } | |
399 | ||
400 | /* Determine the type of scatter/gather list we need */ | |
401 | io_req->sgl_cnt = sg_count; | |
402 | io_req->sgl_type = FNIC_SGL_CACHE_DFLT; | |
403 | if (sg_count > FNIC_DFLT_SG_DESC_CNT) | |
404 | io_req->sgl_type = FNIC_SGL_CACHE_MAX; | |
405 | ||
406 | if (sg_count) { | |
407 | io_req->sgl_list = | |
408 | mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], | |
0c79c742 | 409 | GFP_ATOMIC); |
5df6d737 AJ |
410 | if (!io_req->sgl_list) { |
411 | ret = SCSI_MLQUEUE_HOST_BUSY; | |
412 | scsi_dma_unmap(sc); | |
413 | mempool_free(io_req, fnic->io_req_pool); | |
414 | goto out; | |
415 | } | |
416 | ||
417 | /* Cache sgl list allocated address before alignment */ | |
418 | io_req->sgl_list_alloc = io_req->sgl_list; | |
419 | ptr = (unsigned long) io_req->sgl_list; | |
420 | if (ptr % FNIC_SG_DESC_ALIGN) { | |
421 | io_req->sgl_list = (struct host_sg_desc *) | |
422 | (((unsigned long) ptr | |
423 | + FNIC_SG_DESC_ALIGN - 1) | |
424 | & ~(FNIC_SG_DESC_ALIGN - 1)); | |
425 | } | |
426 | } | |
427 | ||
428 | /* initialize rest of io_req */ | |
429 | io_req->port_id = rport->port_id; | |
430 | CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; | |
431 | CMD_SP(sc) = (char *)io_req; | |
432 | sc->scsi_done = done; | |
433 | ||
434 | /* create copy wq desc and enqueue it */ | |
435 | wq = &fnic->wq_copy[0]; | |
436 | ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); | |
437 | if (ret) { | |
438 | /* | |
439 | * In case another thread cancelled the request, | |
440 | * refetch the pointer under the lock. | |
441 | */ | |
442 | spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc); | |
443 | ||
444 | spin_lock_irqsave(io_lock, flags); | |
445 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
446 | CMD_SP(sc) = NULL; | |
447 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
448 | spin_unlock_irqrestore(io_lock, flags); | |
449 | if (io_req) { | |
450 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
451 | mempool_free(io_req, fnic->io_req_pool); | |
452 | } | |
453 | } | |
454 | out: | |
455 | /* acquire host lock before returning to SCSI */ | |
456 | spin_lock(lp->host->host_lock); | |
457 | return ret; | |
458 | } | |
459 | ||
f281233d JG |
460 | DEF_SCSI_QCMD(fnic_queuecommand) |
461 | ||
5df6d737 AJ |
462 | /* |
463 | * fnic_fcpio_fw_reset_cmpl_handler | |
464 | * Routine to handle fw reset completion | |
465 | */ | |
466 | static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, | |
467 | struct fcpio_fw_req *desc) | |
468 | { | |
469 | u8 type; | |
470 | u8 hdr_status; | |
471 | struct fcpio_tag tag; | |
472 | int ret = 0; | |
5df6d737 AJ |
473 | unsigned long flags; |
474 | ||
475 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
476 | ||
477 | /* Clean up all outstanding io requests */ | |
478 | fnic_cleanup_io(fnic, SCSI_NO_TAG); | |
479 | ||
480 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
481 | ||
5df6d737 AJ |
482 | /* fnic should be in FC_TRANS_ETH_MODE */ |
483 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { | |
484 | /* Check status of reset completion */ | |
485 | if (!hdr_status) { | |
486 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
487 | "reset cmpl success\n"); | |
488 | /* Ready to send flogi out */ | |
489 | fnic->state = FNIC_IN_ETH_MODE; | |
490 | } else { | |
491 | FNIC_SCSI_DBG(KERN_DEBUG, | |
492 | fnic->lport->host, | |
493 | "fnic fw_reset : failed %s\n", | |
494 | fnic_fcpio_status_to_str(hdr_status)); | |
495 | ||
496 | /* | |
497 | * Unable to change to eth mode, cannot send out flogi | |
498 | * Change state to fc mode, so that subsequent Flogi | |
499 | * requests from libFC will cause more attempts to | |
500 | * reset the firmware. Free the cached flogi | |
501 | */ | |
502 | fnic->state = FNIC_IN_FC_MODE; | |
503 | ret = -1; | |
504 | } | |
505 | } else { | |
506 | FNIC_SCSI_DBG(KERN_DEBUG, | |
507 | fnic->lport->host, | |
508 | "Unexpected state %s while processing" | |
509 | " reset cmpl\n", fnic_state_to_str(fnic->state)); | |
510 | ret = -1; | |
511 | } | |
512 | ||
513 | /* Thread removing device blocks till firmware reset is complete */ | |
514 | if (fnic->remove_wait) | |
515 | complete(fnic->remove_wait); | |
516 | ||
517 | /* | |
518 | * If fnic is being removed, or fw reset failed | |
519 | * free the flogi frame. Else, send it out | |
520 | */ | |
521 | if (fnic->remove_wait || ret) { | |
5df6d737 | 522 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
78112e55 | 523 | skb_queue_purge(&fnic->tx_queue); |
5df6d737 AJ |
524 | goto reset_cmpl_handler_end; |
525 | } | |
526 | ||
527 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
528 | ||
78112e55 | 529 | fnic_flush_tx(fnic); |
5df6d737 AJ |
530 | |
531 | reset_cmpl_handler_end: | |
532 | return ret; | |
533 | } | |
534 | ||
535 | /* | |
536 | * fnic_fcpio_flogi_reg_cmpl_handler | |
537 | * Routine to handle flogi register completion | |
538 | */ | |
539 | static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, | |
540 | struct fcpio_fw_req *desc) | |
541 | { | |
542 | u8 type; | |
543 | u8 hdr_status; | |
544 | struct fcpio_tag tag; | |
545 | int ret = 0; | |
5df6d737 | 546 | unsigned long flags; |
5df6d737 AJ |
547 | |
548 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
549 | ||
550 | /* Update fnic state based on status of flogi reg completion */ | |
551 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
552 | ||
5df6d737 AJ |
553 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { |
554 | ||
555 | /* Check flogi registration completion status */ | |
556 | if (!hdr_status) { | |
557 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
558 | "flog reg succeeded\n"); | |
559 | fnic->state = FNIC_IN_FC_MODE; | |
560 | } else { | |
561 | FNIC_SCSI_DBG(KERN_DEBUG, | |
562 | fnic->lport->host, | |
563 | "fnic flogi reg :failed %s\n", | |
564 | fnic_fcpio_status_to_str(hdr_status)); | |
565 | fnic->state = FNIC_IN_ETH_MODE; | |
566 | ret = -1; | |
567 | } | |
568 | } else { | |
569 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
570 | "Unexpected fnic state %s while" | |
571 | " processing flogi reg completion\n", | |
572 | fnic_state_to_str(fnic->state)); | |
573 | ret = -1; | |
574 | } | |
575 | ||
78112e55 | 576 | if (!ret) { |
5df6d737 AJ |
577 | if (fnic->stop_rx_link_events) { |
578 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
579 | goto reg_cmpl_handler_end; | |
580 | } | |
5df6d737 AJ |
581 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
582 | ||
78112e55 | 583 | fnic_flush_tx(fnic); |
5df6d737 | 584 | queue_work(fnic_event_queue, &fnic->frame_work); |
5df6d737 AJ |
585 | } else { |
586 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
5df6d737 AJ |
587 | } |
588 | ||
589 | reg_cmpl_handler_end: | |
590 | return ret; | |
591 | } | |
592 | ||
593 | static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, | |
594 | u16 request_out) | |
595 | { | |
596 | if (wq->to_clean_index <= wq->to_use_index) { | |
597 | /* out of range, stale request_out index */ | |
598 | if (request_out < wq->to_clean_index || | |
599 | request_out >= wq->to_use_index) | |
600 | return 0; | |
601 | } else { | |
602 | /* out of range, stale request_out index */ | |
603 | if (request_out < wq->to_clean_index && | |
604 | request_out >= wq->to_use_index) | |
605 | return 0; | |
606 | } | |
607 | /* request_out index is in range */ | |
608 | return 1; | |
609 | } | |
610 | ||
611 | ||
612 | /* | |
613 | * Mark that ack received and store the Ack index. If there are multiple | |
614 | * acks received before Tx thread cleans it up, the latest value will be | |
615 | * used which is correct behavior. This state should be in the copy Wq | |
616 | * instead of in the fnic | |
617 | */ | |
618 | static inline void fnic_fcpio_ack_handler(struct fnic *fnic, | |
619 | unsigned int cq_index, | |
620 | struct fcpio_fw_req *desc) | |
621 | { | |
622 | struct vnic_wq_copy *wq; | |
623 | u16 request_out = desc->u.ack.request_out; | |
624 | unsigned long flags; | |
625 | ||
626 | /* mark the ack state */ | |
627 | wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; | |
628 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); | |
629 | ||
630 | if (is_ack_index_in_range(wq, request_out)) { | |
631 | fnic->fw_ack_index[0] = request_out; | |
632 | fnic->fw_ack_recd[0] = 1; | |
633 | } | |
634 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
635 | } | |
636 | ||
637 | /* | |
638 | * fnic_fcpio_icmnd_cmpl_handler | |
639 | * Routine to handle icmnd completions | |
640 | */ | |
641 | static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, | |
642 | struct fcpio_fw_req *desc) | |
643 | { | |
644 | u8 type; | |
645 | u8 hdr_status; | |
646 | struct fcpio_tag tag; | |
647 | u32 id; | |
648 | u64 xfer_len = 0; | |
649 | struct fcpio_icmnd_cmpl *icmnd_cmpl; | |
650 | struct fnic_io_req *io_req; | |
651 | struct scsi_cmnd *sc; | |
652 | unsigned long flags; | |
653 | spinlock_t *io_lock; | |
654 | ||
655 | /* Decode the cmpl description to get the io_req id */ | |
656 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
657 | fcpio_tag_id_dec(&tag, &id); | |
658 | ||
659 | if (id >= FNIC_MAX_IO_REQ) | |
660 | return; | |
661 | ||
662 | sc = scsi_host_find_tag(fnic->lport->host, id); | |
663 | WARN_ON_ONCE(!sc); | |
664 | if (!sc) | |
665 | return; | |
666 | ||
667 | io_lock = fnic_io_lock_hash(fnic, sc); | |
668 | spin_lock_irqsave(io_lock, flags); | |
669 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
670 | WARN_ON_ONCE(!io_req); | |
671 | if (!io_req) { | |
672 | spin_unlock_irqrestore(io_lock, flags); | |
673 | return; | |
674 | } | |
675 | ||
676 | /* firmware completed the io */ | |
677 | io_req->io_completed = 1; | |
678 | ||
679 | /* | |
680 | * if SCSI-ML has already issued abort on this command, | |
681 | * ignore completion of the IO. The abts path will clean it up | |
682 | */ | |
683 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
684 | spin_unlock_irqrestore(io_lock, flags); | |
685 | return; | |
686 | } | |
687 | ||
688 | /* Mark the IO as complete */ | |
689 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
690 | ||
691 | icmnd_cmpl = &desc->u.icmnd_cmpl; | |
692 | ||
693 | switch (hdr_status) { | |
694 | case FCPIO_SUCCESS: | |
695 | sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; | |
696 | xfer_len = scsi_bufflen(sc); | |
697 | scsi_set_resid(sc, icmnd_cmpl->residual); | |
698 | ||
699 | if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) | |
700 | xfer_len -= icmnd_cmpl->residual; | |
701 | ||
702 | /* | |
703 | * If queue_full, then try to reduce queue depth for all | |
704 | * LUNS on the target. Todo: this should be accompanied | |
705 | * by a periodic queue_depth rampup based on successful | |
706 | * IO completion. | |
707 | */ | |
708 | if (icmnd_cmpl->scsi_status == QUEUE_FULL) { | |
709 | struct scsi_device *t_sdev; | |
710 | int qd = 0; | |
711 | ||
712 | shost_for_each_device(t_sdev, sc->device->host) { | |
713 | if (t_sdev->id != sc->device->id) | |
714 | continue; | |
715 | ||
716 | if (t_sdev->queue_depth > 1) { | |
717 | qd = scsi_track_queue_full | |
718 | (t_sdev, | |
719 | t_sdev->queue_depth - 1); | |
720 | if (qd == -1) | |
721 | qd = t_sdev->host->cmd_per_lun; | |
722 | shost_printk(KERN_INFO, | |
723 | fnic->lport->host, | |
724 | "scsi[%d:%d:%d:%d" | |
725 | "] queue full detected," | |
726 | "new depth = %d\n", | |
727 | t_sdev->host->host_no, | |
728 | t_sdev->channel, | |
729 | t_sdev->id, t_sdev->lun, | |
730 | t_sdev->queue_depth); | |
731 | } | |
732 | } | |
733 | } | |
734 | break; | |
735 | ||
736 | case FCPIO_TIMEOUT: /* request was timed out */ | |
737 | sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; | |
738 | break; | |
739 | ||
740 | case FCPIO_ABORTED: /* request was aborted */ | |
741 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
742 | break; | |
743 | ||
744 | case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ | |
745 | scsi_set_resid(sc, icmnd_cmpl->residual); | |
746 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
747 | break; | |
748 | ||
749 | case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ | |
750 | sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; | |
751 | break; | |
752 | case FCPIO_INVALID_HEADER: /* header contains invalid data */ | |
753 | case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ | |
754 | case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ | |
755 | case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ | |
756 | case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ | |
757 | case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ | |
758 | case FCPIO_FW_ERR: /* request was terminated due fw error */ | |
759 | default: | |
760 | shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", | |
761 | fnic_fcpio_status_to_str(hdr_status)); | |
762 | sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; | |
763 | break; | |
764 | } | |
765 | ||
766 | /* Break link with the SCSI command */ | |
767 | CMD_SP(sc) = NULL; | |
768 | ||
769 | spin_unlock_irqrestore(io_lock, flags); | |
770 | ||
771 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
772 | ||
773 | mempool_free(io_req, fnic->io_req_pool); | |
774 | ||
775 | if (sc->sc_data_direction == DMA_FROM_DEVICE) { | |
776 | fnic->lport->host_stats.fcp_input_requests++; | |
777 | fnic->fcp_input_bytes += xfer_len; | |
778 | } else if (sc->sc_data_direction == DMA_TO_DEVICE) { | |
779 | fnic->lport->host_stats.fcp_output_requests++; | |
780 | fnic->fcp_output_bytes += xfer_len; | |
781 | } else | |
782 | fnic->lport->host_stats.fcp_control_requests++; | |
783 | ||
784 | /* Call SCSI completion function to complete the IO */ | |
785 | if (sc->scsi_done) | |
786 | sc->scsi_done(sc); | |
787 | ||
788 | } | |
789 | ||
790 | /* fnic_fcpio_itmf_cmpl_handler | |
791 | * Routine to handle itmf completions | |
792 | */ | |
793 | static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, | |
794 | struct fcpio_fw_req *desc) | |
795 | { | |
796 | u8 type; | |
797 | u8 hdr_status; | |
798 | struct fcpio_tag tag; | |
799 | u32 id; | |
800 | struct scsi_cmnd *sc; | |
801 | struct fnic_io_req *io_req; | |
802 | unsigned long flags; | |
803 | spinlock_t *io_lock; | |
804 | ||
805 | fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); | |
806 | fcpio_tag_id_dec(&tag, &id); | |
807 | ||
808 | if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ) | |
809 | return; | |
810 | ||
811 | sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); | |
812 | WARN_ON_ONCE(!sc); | |
813 | if (!sc) | |
814 | return; | |
815 | ||
816 | io_lock = fnic_io_lock_hash(fnic, sc); | |
817 | spin_lock_irqsave(io_lock, flags); | |
818 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
819 | WARN_ON_ONCE(!io_req); | |
820 | if (!io_req) { | |
821 | spin_unlock_irqrestore(io_lock, flags); | |
822 | return; | |
823 | } | |
824 | ||
825 | if (id & FNIC_TAG_ABORT) { | |
826 | /* Completion of abort cmd */ | |
827 | if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { | |
828 | /* This is a late completion. Ignore it */ | |
829 | spin_unlock_irqrestore(io_lock, flags); | |
830 | return; | |
831 | } | |
832 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; | |
833 | CMD_ABTS_STATUS(sc) = hdr_status; | |
834 | ||
835 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
836 | "abts cmpl recd. id %d status %s\n", | |
837 | (int)(id & FNIC_TAG_MASK), | |
838 | fnic_fcpio_status_to_str(hdr_status)); | |
839 | ||
840 | /* | |
841 | * If scsi_eh thread is blocked waiting for abts to complete, | |
842 | * signal completion to it. IO will be cleaned in the thread | |
843 | * else clean it in this context | |
844 | */ | |
845 | if (io_req->abts_done) { | |
846 | complete(io_req->abts_done); | |
847 | spin_unlock_irqrestore(io_lock, flags); | |
848 | } else { | |
849 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
850 | "abts cmpl, completing IO\n"); | |
851 | CMD_SP(sc) = NULL; | |
852 | sc->result = (DID_ERROR << 16); | |
853 | ||
854 | spin_unlock_irqrestore(io_lock, flags); | |
855 | ||
856 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
857 | mempool_free(io_req, fnic->io_req_pool); | |
858 | if (sc->scsi_done) | |
859 | sc->scsi_done(sc); | |
860 | } | |
861 | ||
862 | } else if (id & FNIC_TAG_DEV_RST) { | |
863 | /* Completion of device reset */ | |
864 | CMD_LR_STATUS(sc) = hdr_status; | |
865 | CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; | |
866 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
867 | "dev reset cmpl recd. id %d status %s\n", | |
868 | (int)(id & FNIC_TAG_MASK), | |
869 | fnic_fcpio_status_to_str(hdr_status)); | |
870 | if (io_req->dr_done) | |
871 | complete(io_req->dr_done); | |
872 | spin_unlock_irqrestore(io_lock, flags); | |
873 | ||
874 | } else { | |
875 | shost_printk(KERN_ERR, fnic->lport->host, | |
876 | "Unexpected itmf io state %s tag %x\n", | |
877 | fnic_ioreq_state_to_str(CMD_STATE(sc)), id); | |
878 | spin_unlock_irqrestore(io_lock, flags); | |
879 | } | |
880 | ||
881 | } | |
882 | ||
883 | /* | |
884 | * fnic_fcpio_cmpl_handler | |
885 | * Routine to service the cq for wq_copy | |
886 | */ | |
887 | static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, | |
888 | unsigned int cq_index, | |
889 | struct fcpio_fw_req *desc) | |
890 | { | |
891 | struct fnic *fnic = vnic_dev_priv(vdev); | |
892 | int ret = 0; | |
893 | ||
894 | switch (desc->hdr.type) { | |
895 | case FCPIO_ACK: /* fw copied copy wq desc to its queue */ | |
896 | fnic_fcpio_ack_handler(fnic, cq_index, desc); | |
897 | break; | |
898 | ||
899 | case FCPIO_ICMND_CMPL: /* fw completed a command */ | |
900 | fnic_fcpio_icmnd_cmpl_handler(fnic, desc); | |
901 | break; | |
902 | ||
903 | case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ | |
904 | fnic_fcpio_itmf_cmpl_handler(fnic, desc); | |
905 | break; | |
906 | ||
907 | case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ | |
78112e55 | 908 | case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ |
5df6d737 AJ |
909 | ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); |
910 | break; | |
911 | ||
912 | case FCPIO_RESET_CMPL: /* fw completed reset */ | |
913 | ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); | |
914 | break; | |
915 | ||
916 | default: | |
917 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
918 | "firmware completion type %d\n", | |
919 | desc->hdr.type); | |
920 | break; | |
921 | } | |
922 | ||
923 | return ret; | |
924 | } | |
925 | ||
926 | /* | |
927 | * fnic_wq_copy_cmpl_handler | |
928 | * Routine to process wq copy | |
929 | */ | |
930 | int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) | |
931 | { | |
932 | unsigned int wq_work_done = 0; | |
933 | unsigned int i, cq_index; | |
934 | unsigned int cur_work_done; | |
935 | ||
936 | for (i = 0; i < fnic->wq_copy_count; i++) { | |
937 | cq_index = i + fnic->raw_wq_count + fnic->rq_count; | |
938 | cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], | |
939 | fnic_fcpio_cmpl_handler, | |
940 | copy_work_to_do); | |
941 | wq_work_done += cur_work_done; | |
942 | } | |
943 | return wq_work_done; | |
944 | } | |
945 | ||
946 | static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) | |
947 | { | |
948 | unsigned int i; | |
949 | struct fnic_io_req *io_req; | |
950 | unsigned long flags = 0; | |
951 | struct scsi_cmnd *sc; | |
952 | spinlock_t *io_lock; | |
953 | ||
954 | for (i = 0; i < FNIC_MAX_IO_REQ; i++) { | |
955 | if (i == exclude_id) | |
956 | continue; | |
957 | ||
958 | sc = scsi_host_find_tag(fnic->lport->host, i); | |
959 | if (!sc) | |
960 | continue; | |
961 | ||
962 | io_lock = fnic_io_lock_hash(fnic, sc); | |
963 | spin_lock_irqsave(io_lock, flags); | |
964 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
965 | if (!io_req) { | |
966 | spin_unlock_irqrestore(io_lock, flags); | |
967 | goto cleanup_scsi_cmd; | |
968 | } | |
969 | ||
970 | CMD_SP(sc) = NULL; | |
971 | ||
972 | spin_unlock_irqrestore(io_lock, flags); | |
973 | ||
974 | /* | |
975 | * If there is a scsi_cmnd associated with this io_req, then | |
976 | * free the corresponding state | |
977 | */ | |
978 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
979 | mempool_free(io_req, fnic->io_req_pool); | |
980 | ||
981 | cleanup_scsi_cmd: | |
982 | sc->result = DID_TRANSPORT_DISRUPTED << 16; | |
983 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:" | |
984 | " DID_TRANSPORT_DISRUPTED\n"); | |
985 | ||
986 | /* Complete the command to SCSI */ | |
987 | if (sc->scsi_done) | |
988 | sc->scsi_done(sc); | |
989 | } | |
990 | } | |
991 | ||
992 | void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, | |
993 | struct fcpio_host_req *desc) | |
994 | { | |
995 | u32 id; | |
996 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
997 | struct fnic_io_req *io_req; | |
998 | struct scsi_cmnd *sc; | |
999 | unsigned long flags; | |
1000 | spinlock_t *io_lock; | |
1001 | ||
1002 | /* get the tag reference */ | |
1003 | fcpio_tag_id_dec(&desc->hdr.tag, &id); | |
1004 | id &= FNIC_TAG_MASK; | |
1005 | ||
1006 | if (id >= FNIC_MAX_IO_REQ) | |
1007 | return; | |
1008 | ||
1009 | sc = scsi_host_find_tag(fnic->lport->host, id); | |
1010 | if (!sc) | |
1011 | return; | |
1012 | ||
1013 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1014 | spin_lock_irqsave(io_lock, flags); | |
1015 | ||
1016 | /* Get the IO context which this desc refers to */ | |
1017 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1018 | ||
1019 | /* fnic interrupts are turned off by now */ | |
1020 | ||
1021 | if (!io_req) { | |
1022 | spin_unlock_irqrestore(io_lock, flags); | |
1023 | goto wq_copy_cleanup_scsi_cmd; | |
1024 | } | |
1025 | ||
1026 | CMD_SP(sc) = NULL; | |
1027 | ||
1028 | spin_unlock_irqrestore(io_lock, flags); | |
1029 | ||
1030 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
1031 | mempool_free(io_req, fnic->io_req_pool); | |
1032 | ||
1033 | wq_copy_cleanup_scsi_cmd: | |
1034 | sc->result = DID_NO_CONNECT << 16; | |
1035 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" | |
1036 | " DID_NO_CONNECT\n"); | |
1037 | ||
1038 | if (sc->scsi_done) | |
1039 | sc->scsi_done(sc); | |
1040 | } | |
1041 | ||
1042 | static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, | |
1043 | u32 task_req, u8 *fc_lun, | |
1044 | struct fnic_io_req *io_req) | |
1045 | { | |
1046 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
1047 | unsigned long flags; | |
1048 | ||
1049 | spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); | |
1050 | ||
1051 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
1052 | free_wq_copy_descs(fnic, wq); | |
1053 | ||
1054 | if (!vnic_wq_copy_desc_avail(wq)) { | |
1055 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
1056 | return 1; | |
1057 | } | |
1058 | fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, | |
1059 | 0, task_req, tag, fc_lun, io_req->port_id, | |
1060 | fnic->config.ra_tov, fnic->config.ed_tov); | |
1061 | ||
1062 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) | |
1067 | { | |
1068 | int tag; | |
1069 | struct fnic_io_req *io_req; | |
1070 | spinlock_t *io_lock; | |
1071 | unsigned long flags; | |
1072 | struct scsi_cmnd *sc; | |
1073 | struct scsi_lun fc_lun; | |
1074 | enum fnic_ioreq_state old_ioreq_state; | |
1075 | ||
1076 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1077 | fnic->lport->host, | |
1078 | "fnic_rport_reset_exch called portid 0x%06x\n", | |
1079 | port_id); | |
1080 | ||
1081 | if (fnic->in_remove) | |
1082 | return; | |
1083 | ||
1084 | for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { | |
1085 | sc = scsi_host_find_tag(fnic->lport->host, tag); | |
1086 | if (!sc) | |
1087 | continue; | |
1088 | ||
1089 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1090 | spin_lock_irqsave(io_lock, flags); | |
1091 | ||
1092 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1093 | ||
1094 | if (!io_req || io_req->port_id != port_id) { | |
1095 | spin_unlock_irqrestore(io_lock, flags); | |
1096 | continue; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Found IO that is still pending with firmware and | |
1101 | * belongs to rport that went away | |
1102 | */ | |
1103 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1104 | spin_unlock_irqrestore(io_lock, flags); | |
1105 | continue; | |
1106 | } | |
1107 | old_ioreq_state = CMD_STATE(sc); | |
1108 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1109 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
1110 | ||
1111 | BUG_ON(io_req->abts_done); | |
1112 | ||
1113 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1114 | "fnic_rport_reset_exch: Issuing abts\n"); | |
1115 | ||
1116 | spin_unlock_irqrestore(io_lock, flags); | |
1117 | ||
1118 | /* Now queue the abort command to firmware */ | |
1119 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1120 | ||
1121 | if (fnic_queue_abort_io_req(fnic, tag, | |
1122 | FCPIO_ITMF_ABT_TASK_TERM, | |
1123 | fc_lun.scsi_lun, io_req)) { | |
1124 | /* | |
1125 | * Revert the cmd state back to old state, if | |
25985edc | 1126 | * it hasn't changed in between. This cmd will get |
5df6d737 AJ |
1127 | * aborted later by scsi_eh, or cleaned up during |
1128 | * lun reset | |
1129 | */ | |
1130 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1131 | ||
1132 | spin_lock_irqsave(io_lock, flags); | |
1133 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) | |
1134 | CMD_STATE(sc) = old_ioreq_state; | |
1135 | spin_unlock_irqrestore(io_lock, flags); | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | } | |
1140 | ||
1141 | void fnic_terminate_rport_io(struct fc_rport *rport) | |
1142 | { | |
1143 | int tag; | |
1144 | struct fnic_io_req *io_req; | |
1145 | spinlock_t *io_lock; | |
1146 | unsigned long flags; | |
1147 | struct scsi_cmnd *sc; | |
1148 | struct scsi_lun fc_lun; | |
1149 | struct fc_rport_libfc_priv *rdata = rport->dd_data; | |
1150 | struct fc_lport *lport = rdata->local_port; | |
1151 | struct fnic *fnic = lport_priv(lport); | |
1152 | struct fc_rport *cmd_rport; | |
1153 | enum fnic_ioreq_state old_ioreq_state; | |
1154 | ||
1155 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1156 | fnic->lport->host, "fnic_terminate_rport_io called" | |
1157 | " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n", | |
1158 | rport->port_name, rport->node_name, | |
1159 | rport->port_id); | |
1160 | ||
1161 | if (fnic->in_remove) | |
1162 | return; | |
1163 | ||
1164 | for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { | |
1165 | sc = scsi_host_find_tag(fnic->lport->host, tag); | |
1166 | if (!sc) | |
1167 | continue; | |
1168 | ||
1169 | cmd_rport = starget_to_rport(scsi_target(sc->device)); | |
1170 | if (rport != cmd_rport) | |
1171 | continue; | |
1172 | ||
1173 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1174 | spin_lock_irqsave(io_lock, flags); | |
1175 | ||
1176 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1177 | ||
1178 | if (!io_req || rport != cmd_rport) { | |
1179 | spin_unlock_irqrestore(io_lock, flags); | |
1180 | continue; | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * Found IO that is still pending with firmware and | |
1185 | * belongs to rport that went away | |
1186 | */ | |
1187 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1188 | spin_unlock_irqrestore(io_lock, flags); | |
1189 | continue; | |
1190 | } | |
1191 | old_ioreq_state = CMD_STATE(sc); | |
1192 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1193 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
1194 | ||
1195 | BUG_ON(io_req->abts_done); | |
1196 | ||
1197 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1198 | fnic->lport->host, | |
1199 | "fnic_terminate_rport_io: Issuing abts\n"); | |
1200 | ||
1201 | spin_unlock_irqrestore(io_lock, flags); | |
1202 | ||
1203 | /* Now queue the abort command to firmware */ | |
1204 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1205 | ||
1206 | if (fnic_queue_abort_io_req(fnic, tag, | |
1207 | FCPIO_ITMF_ABT_TASK_TERM, | |
1208 | fc_lun.scsi_lun, io_req)) { | |
1209 | /* | |
1210 | * Revert the cmd state back to old state, if | |
25985edc | 1211 | * it hasn't changed in between. This cmd will get |
5df6d737 AJ |
1212 | * aborted later by scsi_eh, or cleaned up during |
1213 | * lun reset | |
1214 | */ | |
1215 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1216 | ||
1217 | spin_lock_irqsave(io_lock, flags); | |
1218 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) | |
1219 | CMD_STATE(sc) = old_ioreq_state; | |
1220 | spin_unlock_irqrestore(io_lock, flags); | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | } | |
1225 | ||
5df6d737 AJ |
1226 | /* |
1227 | * This function is exported to SCSI for sending abort cmnds. | |
1228 | * A SCSI IO is represented by a io_req in the driver. | |
1229 | * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. | |
1230 | */ | |
1231 | int fnic_abort_cmd(struct scsi_cmnd *sc) | |
1232 | { | |
1233 | struct fc_lport *lp; | |
1234 | struct fnic *fnic; | |
1235 | struct fnic_io_req *io_req; | |
1236 | struct fc_rport *rport; | |
1237 | spinlock_t *io_lock; | |
1238 | unsigned long flags; | |
1239 | int ret = SUCCESS; | |
1240 | u32 task_req; | |
1241 | struct scsi_lun fc_lun; | |
1242 | DECLARE_COMPLETION_ONSTACK(tm_done); | |
1243 | ||
1244 | /* Wait for rport to unblock */ | |
65d430fa | 1245 | fc_block_scsi_eh(sc); |
5df6d737 AJ |
1246 | |
1247 | /* Get local-port, check ready and link up */ | |
1248 | lp = shost_priv(sc->device->host); | |
1249 | ||
1250 | fnic = lport_priv(lp); | |
0db6f435 RK |
1251 | rport = starget_to_rport(scsi_target(sc->device)); |
1252 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1253 | "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n", | |
1254 | rport->port_id, sc->device->lun, sc->request->tag); | |
5df6d737 AJ |
1255 | |
1256 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) { | |
1257 | ret = FAILED; | |
1258 | goto fnic_abort_cmd_end; | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Avoid a race between SCSI issuing the abort and the device | |
1263 | * completing the command. | |
1264 | * | |
1265 | * If the command is already completed by the fw cmpl code, | |
1266 | * we just return SUCCESS from here. This means that the abort | |
1267 | * succeeded. In the SCSI ML, since the timeout for command has | |
1268 | * happened, the completion wont actually complete the command | |
1269 | * and it will be considered as an aborted command | |
1270 | * | |
1271 | * The CMD_SP will not be cleared except while holding io_req_lock. | |
1272 | */ | |
1273 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1274 | spin_lock_irqsave(io_lock, flags); | |
1275 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1276 | if (!io_req) { | |
1277 | spin_unlock_irqrestore(io_lock, flags); | |
1278 | goto fnic_abort_cmd_end; | |
1279 | } | |
1280 | ||
1281 | io_req->abts_done = &tm_done; | |
1282 | ||
1283 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1284 | spin_unlock_irqrestore(io_lock, flags); | |
1285 | goto wait_pending; | |
1286 | } | |
1287 | /* | |
1288 | * Command is still pending, need to abort it | |
1289 | * If the firmware completes the command after this point, | |
1290 | * the completion wont be done till mid-layer, since abort | |
1291 | * has already started. | |
1292 | */ | |
1293 | CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; | |
1294 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
1295 | ||
1296 | spin_unlock_irqrestore(io_lock, flags); | |
1297 | ||
1298 | /* | |
1299 | * Check readiness of the remote port. If the path to remote | |
1300 | * port is up, then send abts to the remote port to terminate | |
1301 | * the IO. Else, just locally terminate the IO in the firmware | |
1302 | */ | |
5df6d737 AJ |
1303 | if (fc_remote_port_chkready(rport) == 0) |
1304 | task_req = FCPIO_ITMF_ABT_TASK; | |
1305 | else | |
1306 | task_req = FCPIO_ITMF_ABT_TASK_TERM; | |
1307 | ||
1308 | /* Now queue the abort command to firmware */ | |
1309 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1310 | ||
1311 | if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, | |
1312 | fc_lun.scsi_lun, io_req)) { | |
1313 | spin_lock_irqsave(io_lock, flags); | |
1314 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1315 | if (io_req) | |
1316 | io_req->abts_done = NULL; | |
1317 | spin_unlock_irqrestore(io_lock, flags); | |
1318 | ret = FAILED; | |
1319 | goto fnic_abort_cmd_end; | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * We queued an abort IO, wait for its completion. | |
1324 | * Once the firmware completes the abort command, it will | |
1325 | * wake up this thread. | |
1326 | */ | |
1327 | wait_pending: | |
1328 | wait_for_completion_timeout(&tm_done, | |
1329 | msecs_to_jiffies | |
1330 | (2 * fnic->config.ra_tov + | |
1331 | fnic->config.ed_tov)); | |
1332 | ||
1333 | /* Check the abort status */ | |
1334 | spin_lock_irqsave(io_lock, flags); | |
1335 | ||
1336 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1337 | if (!io_req) { | |
1338 | spin_unlock_irqrestore(io_lock, flags); | |
1339 | ret = FAILED; | |
1340 | goto fnic_abort_cmd_end; | |
1341 | } | |
1342 | io_req->abts_done = NULL; | |
1343 | ||
1344 | /* fw did not complete abort, timed out */ | |
1345 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1346 | spin_unlock_irqrestore(io_lock, flags); | |
1347 | ret = FAILED; | |
1348 | goto fnic_abort_cmd_end; | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * firmware completed the abort, check the status, | |
1353 | * free the io_req irrespective of failure or success | |
1354 | */ | |
1355 | if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS) | |
1356 | ret = FAILED; | |
1357 | ||
1358 | CMD_SP(sc) = NULL; | |
1359 | ||
1360 | spin_unlock_irqrestore(io_lock, flags); | |
1361 | ||
1362 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
1363 | mempool_free(io_req, fnic->io_req_pool); | |
1364 | ||
1365 | fnic_abort_cmd_end: | |
1366 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1367 | "Returning from abort cmd %s\n", | |
1368 | (ret == SUCCESS) ? | |
1369 | "SUCCESS" : "FAILED"); | |
1370 | return ret; | |
1371 | } | |
1372 | ||
1373 | static inline int fnic_queue_dr_io_req(struct fnic *fnic, | |
1374 | struct scsi_cmnd *sc, | |
1375 | struct fnic_io_req *io_req) | |
1376 | { | |
1377 | struct vnic_wq_copy *wq = &fnic->wq_copy[0]; | |
1378 | struct scsi_lun fc_lun; | |
1379 | int ret = 0; | |
1380 | unsigned long intr_flags; | |
1381 | ||
1382 | spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); | |
1383 | ||
1384 | if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) | |
1385 | free_wq_copy_descs(fnic, wq); | |
1386 | ||
1387 | if (!vnic_wq_copy_desc_avail(wq)) { | |
1388 | ret = -EAGAIN; | |
1389 | goto lr_io_req_end; | |
1390 | } | |
1391 | ||
1392 | /* fill in the lun info */ | |
1393 | int_to_scsilun(sc->device->lun, &fc_lun); | |
1394 | ||
1395 | fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, | |
1396 | 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, | |
1397 | fc_lun.scsi_lun, io_req->port_id, | |
1398 | fnic->config.ra_tov, fnic->config.ed_tov); | |
1399 | ||
1400 | lr_io_req_end: | |
1401 | spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); | |
1402 | ||
1403 | return ret; | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * Clean up any pending aborts on the lun | |
1408 | * For each outstanding IO on this lun, whose abort is not completed by fw, | |
1409 | * issue a local abort. Wait for abort to complete. Return 0 if all commands | |
1410 | * successfully aborted, 1 otherwise | |
1411 | */ | |
1412 | static int fnic_clean_pending_aborts(struct fnic *fnic, | |
1413 | struct scsi_cmnd *lr_sc) | |
1414 | { | |
1415 | int tag; | |
1416 | struct fnic_io_req *io_req; | |
1417 | spinlock_t *io_lock; | |
1418 | unsigned long flags; | |
1419 | int ret = 0; | |
1420 | struct scsi_cmnd *sc; | |
5df6d737 AJ |
1421 | struct scsi_lun fc_lun; |
1422 | struct scsi_device *lun_dev = lr_sc->device; | |
1423 | DECLARE_COMPLETION_ONSTACK(tm_done); | |
1424 | ||
1425 | for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { | |
1426 | sc = scsi_host_find_tag(fnic->lport->host, tag); | |
1427 | /* | |
1428 | * ignore this lun reset cmd or cmds that do not belong to | |
1429 | * this lun | |
1430 | */ | |
1431 | if (!sc || sc == lr_sc || sc->device != lun_dev) | |
1432 | continue; | |
1433 | ||
1434 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1435 | spin_lock_irqsave(io_lock, flags); | |
1436 | ||
1437 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1438 | ||
1439 | if (!io_req || sc->device != lun_dev) { | |
1440 | spin_unlock_irqrestore(io_lock, flags); | |
1441 | continue; | |
1442 | } | |
1443 | ||
1444 | /* | |
1445 | * Found IO that is still pending with firmware and | |
1446 | * belongs to the LUN that we are resetting | |
1447 | */ | |
1448 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1449 | "Found IO in %s on lun\n", | |
1450 | fnic_ioreq_state_to_str(CMD_STATE(sc))); | |
1451 | ||
1452 | BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING); | |
1453 | ||
1454 | CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; | |
1455 | io_req->abts_done = &tm_done; | |
1456 | spin_unlock_irqrestore(io_lock, flags); | |
1457 | ||
1458 | /* Now queue the abort command to firmware */ | |
1459 | int_to_scsilun(sc->device->lun, &fc_lun); | |
5df6d737 AJ |
1460 | |
1461 | if (fnic_queue_abort_io_req(fnic, tag, | |
1462 | FCPIO_ITMF_ABT_TASK_TERM, | |
1463 | fc_lun.scsi_lun, io_req)) { | |
1464 | spin_lock_irqsave(io_lock, flags); | |
1465 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1466 | if (io_req) | |
1467 | io_req->abts_done = NULL; | |
1468 | spin_unlock_irqrestore(io_lock, flags); | |
1469 | ret = 1; | |
1470 | goto clean_pending_aborts_end; | |
1471 | } | |
1472 | ||
1473 | wait_for_completion_timeout(&tm_done, | |
1474 | msecs_to_jiffies | |
1475 | (fnic->config.ed_tov)); | |
1476 | ||
1477 | /* Recheck cmd state to check if it is now aborted */ | |
1478 | spin_lock_irqsave(io_lock, flags); | |
1479 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1480 | if (!io_req) { | |
1481 | spin_unlock_irqrestore(io_lock, flags); | |
1482 | ret = 1; | |
1483 | goto clean_pending_aborts_end; | |
1484 | } | |
1485 | ||
1486 | io_req->abts_done = NULL; | |
1487 | ||
1488 | /* if abort is still pending with fw, fail */ | |
1489 | if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { | |
1490 | spin_unlock_irqrestore(io_lock, flags); | |
1491 | ret = 1; | |
1492 | goto clean_pending_aborts_end; | |
1493 | } | |
1494 | CMD_SP(sc) = NULL; | |
1495 | spin_unlock_irqrestore(io_lock, flags); | |
1496 | ||
1497 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
1498 | mempool_free(io_req, fnic->io_req_pool); | |
1499 | } | |
1500 | ||
1501 | clean_pending_aborts_end: | |
1502 | return ret; | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN | |
1507 | * fail to get aborted. It calls driver's eh_device_reset with a SCSI command | |
1508 | * on the LUN. | |
1509 | */ | |
1510 | int fnic_device_reset(struct scsi_cmnd *sc) | |
1511 | { | |
1512 | struct fc_lport *lp; | |
1513 | struct fnic *fnic; | |
1514 | struct fnic_io_req *io_req; | |
1515 | struct fc_rport *rport; | |
1516 | int status; | |
1517 | int ret = FAILED; | |
1518 | spinlock_t *io_lock; | |
1519 | unsigned long flags; | |
1520 | DECLARE_COMPLETION_ONSTACK(tm_done); | |
1521 | ||
1522 | /* Wait for rport to unblock */ | |
65d430fa | 1523 | fc_block_scsi_eh(sc); |
5df6d737 AJ |
1524 | |
1525 | /* Get local-port, check ready and link up */ | |
1526 | lp = shost_priv(sc->device->host); | |
1527 | ||
1528 | fnic = lport_priv(lp); | |
5df6d737 | 1529 | |
0db6f435 RK |
1530 | rport = starget_to_rport(scsi_target(sc->device)); |
1531 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1532 | "Device reset called FCID 0x%x, LUN 0x%x\n", | |
1533 | rport->port_id, sc->device->lun); | |
5df6d737 AJ |
1534 | |
1535 | if (lp->state != LPORT_ST_READY || !(lp->link_up)) | |
1536 | goto fnic_device_reset_end; | |
1537 | ||
1538 | /* Check if remote port up */ | |
5df6d737 AJ |
1539 | if (fc_remote_port_chkready(rport)) |
1540 | goto fnic_device_reset_end; | |
1541 | ||
1542 | io_lock = fnic_io_lock_hash(fnic, sc); | |
1543 | spin_lock_irqsave(io_lock, flags); | |
1544 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1545 | ||
1546 | /* | |
1547 | * If there is a io_req attached to this command, then use it, | |
1548 | * else allocate a new one. | |
1549 | */ | |
1550 | if (!io_req) { | |
1551 | io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); | |
1552 | if (!io_req) { | |
1553 | spin_unlock_irqrestore(io_lock, flags); | |
1554 | goto fnic_device_reset_end; | |
1555 | } | |
1556 | memset(io_req, 0, sizeof(*io_req)); | |
1557 | io_req->port_id = rport->port_id; | |
1558 | CMD_SP(sc) = (char *)io_req; | |
1559 | } | |
1560 | io_req->dr_done = &tm_done; | |
1561 | CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; | |
1562 | CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; | |
1563 | spin_unlock_irqrestore(io_lock, flags); | |
1564 | ||
1565 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n", | |
1566 | sc->request->tag); | |
1567 | ||
1568 | /* | |
1569 | * issue the device reset, if enqueue failed, clean up the ioreq | |
1570 | * and break assoc with scsi cmd | |
1571 | */ | |
1572 | if (fnic_queue_dr_io_req(fnic, sc, io_req)) { | |
1573 | spin_lock_irqsave(io_lock, flags); | |
1574 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1575 | if (io_req) | |
1576 | io_req->dr_done = NULL; | |
1577 | goto fnic_device_reset_clean; | |
1578 | } | |
1579 | ||
1580 | /* | |
1581 | * Wait on the local completion for LUN reset. The io_req may be | |
1582 | * freed while we wait since we hold no lock. | |
1583 | */ | |
1584 | wait_for_completion_timeout(&tm_done, | |
1585 | msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); | |
1586 | ||
1587 | spin_lock_irqsave(io_lock, flags); | |
1588 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1589 | if (!io_req) { | |
1590 | spin_unlock_irqrestore(io_lock, flags); | |
1591 | goto fnic_device_reset_end; | |
1592 | } | |
1593 | io_req->dr_done = NULL; | |
1594 | ||
1595 | status = CMD_LR_STATUS(sc); | |
1596 | spin_unlock_irqrestore(io_lock, flags); | |
1597 | ||
1598 | /* | |
1599 | * If lun reset not completed, bail out with failed. io_req | |
1600 | * gets cleaned up during higher levels of EH | |
1601 | */ | |
1602 | if (status == FCPIO_INVALID_CODE) { | |
1603 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1604 | "Device reset timed out\n"); | |
1605 | goto fnic_device_reset_end; | |
1606 | } | |
1607 | ||
1608 | /* Completed, but not successful, clean up the io_req, return fail */ | |
1609 | if (status != FCPIO_SUCCESS) { | |
1610 | spin_lock_irqsave(io_lock, flags); | |
1611 | FNIC_SCSI_DBG(KERN_DEBUG, | |
1612 | fnic->lport->host, | |
1613 | "Device reset completed - failed\n"); | |
1614 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1615 | goto fnic_device_reset_clean; | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * Clean up any aborts on this lun that have still not | |
1620 | * completed. If any of these fail, then LUN reset fails. | |
1621 | * clean_pending_aborts cleans all cmds on this lun except | |
1622 | * the lun reset cmd. If all cmds get cleaned, the lun reset | |
1623 | * succeeds | |
1624 | */ | |
1625 | if (fnic_clean_pending_aborts(fnic, sc)) { | |
1626 | spin_lock_irqsave(io_lock, flags); | |
1627 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1628 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1629 | "Device reset failed" | |
1630 | " since could not abort all IOs\n"); | |
1631 | goto fnic_device_reset_clean; | |
1632 | } | |
1633 | ||
1634 | /* Clean lun reset command */ | |
1635 | spin_lock_irqsave(io_lock, flags); | |
1636 | io_req = (struct fnic_io_req *)CMD_SP(sc); | |
1637 | if (io_req) | |
1638 | /* Completed, and successful */ | |
1639 | ret = SUCCESS; | |
1640 | ||
1641 | fnic_device_reset_clean: | |
1642 | if (io_req) | |
1643 | CMD_SP(sc) = NULL; | |
1644 | ||
1645 | spin_unlock_irqrestore(io_lock, flags); | |
1646 | ||
1647 | if (io_req) { | |
1648 | fnic_release_ioreq_buf(fnic, io_req, sc); | |
1649 | mempool_free(io_req, fnic->io_req_pool); | |
1650 | } | |
1651 | ||
1652 | fnic_device_reset_end: | |
1653 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1654 | "Returning from device reset %s\n", | |
1655 | (ret == SUCCESS) ? | |
1656 | "SUCCESS" : "FAILED"); | |
1657 | return ret; | |
1658 | } | |
1659 | ||
1660 | /* Clean up all IOs, clean up libFC local port */ | |
1661 | int fnic_reset(struct Scsi_Host *shost) | |
1662 | { | |
1663 | struct fc_lport *lp; | |
1664 | struct fnic *fnic; | |
1665 | int ret = SUCCESS; | |
1666 | ||
1667 | lp = shost_priv(shost); | |
1668 | fnic = lport_priv(lp); | |
1669 | ||
1670 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1671 | "fnic_reset called\n"); | |
1672 | ||
1673 | /* | |
1674 | * Reset local port, this will clean up libFC exchanges, | |
1675 | * reset remote port sessions, and if link is up, begin flogi | |
1676 | */ | |
1677 | if (lp->tt.lport_reset(lp)) | |
1678 | ret = FAILED; | |
1679 | ||
1680 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1681 | "Returning from fnic reset %s\n", | |
1682 | (ret == SUCCESS) ? | |
1683 | "SUCCESS" : "FAILED"); | |
1684 | ||
1685 | return ret; | |
1686 | } | |
1687 | ||
1688 | /* | |
1689 | * SCSI Error handling calls driver's eh_host_reset if all prior | |
1690 | * error handling levels return FAILED. If host reset completes | |
1691 | * successfully, and if link is up, then Fabric login begins. | |
1692 | * | |
1693 | * Host Reset is the highest level of error recovery. If this fails, then | |
1694 | * host is offlined by SCSI. | |
1695 | * | |
1696 | */ | |
1697 | int fnic_host_reset(struct scsi_cmnd *sc) | |
1698 | { | |
1699 | int ret; | |
1700 | unsigned long wait_host_tmo; | |
1701 | struct Scsi_Host *shost = sc->device->host; | |
1702 | struct fc_lport *lp = shost_priv(shost); | |
1703 | ||
1704 | /* | |
1705 | * If fnic_reset is successful, wait for fabric login to complete | |
1706 | * scsi-ml tries to send a TUR to every device if host reset is | |
1707 | * successful, so before returning to scsi, fabric should be up | |
1708 | */ | |
1709 | ret = fnic_reset(shost); | |
1710 | if (ret == SUCCESS) { | |
1711 | wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; | |
1712 | ret = FAILED; | |
1713 | while (time_before(jiffies, wait_host_tmo)) { | |
1714 | if ((lp->state == LPORT_ST_READY) && | |
1715 | (lp->link_up)) { | |
1716 | ret = SUCCESS; | |
1717 | break; | |
1718 | } | |
1719 | ssleep(1); | |
1720 | } | |
1721 | } | |
1722 | ||
1723 | return ret; | |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * This fxn is called from libFC when host is removed | |
1728 | */ | |
1729 | void fnic_scsi_abort_io(struct fc_lport *lp) | |
1730 | { | |
1731 | int err = 0; | |
1732 | unsigned long flags; | |
1733 | enum fnic_state old_state; | |
1734 | struct fnic *fnic = lport_priv(lp); | |
1735 | DECLARE_COMPLETION_ONSTACK(remove_wait); | |
1736 | ||
1737 | /* Issue firmware reset for fnic, wait for reset to complete */ | |
1738 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1739 | fnic->remove_wait = &remove_wait; | |
1740 | old_state = fnic->state; | |
1741 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
78112e55 | 1742 | fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); |
5df6d737 AJ |
1743 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
1744 | ||
1745 | err = fnic_fw_reset_handler(fnic); | |
1746 | if (err) { | |
1747 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1748 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) | |
1749 | fnic->state = old_state; | |
1750 | fnic->remove_wait = NULL; | |
1751 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1752 | return; | |
1753 | } | |
1754 | ||
1755 | /* Wait for firmware reset to complete */ | |
1756 | wait_for_completion_timeout(&remove_wait, | |
1757 | msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); | |
1758 | ||
1759 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1760 | fnic->remove_wait = NULL; | |
1761 | FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, | |
1762 | "fnic_scsi_abort_io %s\n", | |
1763 | (fnic->state == FNIC_IN_ETH_MODE) ? | |
1764 | "SUCCESS" : "FAILED"); | |
1765 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1766 | ||
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * This fxn called from libFC to clean up driver IO state on link down | |
1771 | */ | |
1772 | void fnic_scsi_cleanup(struct fc_lport *lp) | |
1773 | { | |
1774 | unsigned long flags; | |
1775 | enum fnic_state old_state; | |
1776 | struct fnic *fnic = lport_priv(lp); | |
1777 | ||
1778 | /* issue fw reset */ | |
1779 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1780 | old_state = fnic->state; | |
1781 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
78112e55 | 1782 | fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); |
5df6d737 AJ |
1783 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
1784 | ||
1785 | if (fnic_fw_reset_handler(fnic)) { | |
1786 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1787 | if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) | |
1788 | fnic->state = old_state; | |
1789 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1790 | } | |
1791 | ||
1792 | } | |
1793 | ||
1794 | void fnic_empty_scsi_cleanup(struct fc_lport *lp) | |
1795 | { | |
1796 | } | |
1797 | ||
1798 | void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) | |
1799 | { | |
1800 | struct fnic *fnic = lport_priv(lp); | |
1801 | ||
1802 | /* Non-zero sid, nothing to do */ | |
1803 | if (sid) | |
1804 | goto call_fc_exch_mgr_reset; | |
1805 | ||
1806 | if (did) { | |
1807 | fnic_rport_exch_reset(fnic, did); | |
1808 | goto call_fc_exch_mgr_reset; | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * sid = 0, did = 0 | |
1813 | * link down or device being removed | |
1814 | */ | |
1815 | if (!fnic->in_remove) | |
1816 | fnic_scsi_cleanup(lp); | |
1817 | else | |
1818 | fnic_scsi_abort_io(lp); | |
1819 | ||
1820 | /* call libFC exch mgr reset to reset its exchanges */ | |
1821 | call_fc_exch_mgr_reset: | |
1822 | fc_exch_mgr_reset(lp, sid, did); | |
1823 | ||
1824 | } |