1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6 * Copyright (C) 2004-2016 Emulex. All rights reserved. *
7 * EMULEX and SLI are trademarks of Emulex. *
8 * www.broadcom.com *
9 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
10 * *
11 * This program is free software; you can redistribute it and/or *
12 * modify it under the terms of version 2 of the GNU General *
13 * Public License as published by the Free Software Foundation. *
14 * This program is distributed in the hope that it will be useful. *
15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19 * TO BE LEGALLY INVALID. See the GNU General Public License for *
20 * more details, a copy of which can be found in the file COPYING *
21 * included with this package. *
22 ********************************************************************/
23 #include <linux/pci.h>
24 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26 #include <linux/delay.h>
27 #include <asm/unaligned.h>
28 #include <linux/crc-t10dif.h>
29 #include <net/checksum.h>
30
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_eh.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <scsi/fc/fc_fs.h>
38
39 #include "lpfc_version.h"
40 #include "lpfc_hw4.h"
41 #include "lpfc_hw.h"
42 #include "lpfc_sli.h"
43 #include "lpfc_sli4.h"
44 #include "lpfc_nl.h"
45 #include "lpfc_disc.h"
46 #include "lpfc.h"
47 #include "lpfc_nvme.h"
48 #include "lpfc_scsi.h"
49 #include "lpfc_logmsg.h"
50 #include "lpfc_crtn.h"
51 #include "lpfc_vport.h"
52 #include "lpfc_debugfs.h"
53
54 /* NVME initiator-based functions */
55
56 static struct lpfc_io_buf *
57 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
58 int idx, int expedite);
59
60 static void
61 lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_io_buf *);
62
63 static struct nvme_fc_port_template lpfc_nvme_template;
64
65 /**
66 * lpfc_nvme_create_queue -
67 * @pnvme_lport: Transport localport that LS is to be issued from
68 * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
69 * @qsize: Size of the queue in bytes
70 * @handle: An opaque driver handle used in follow-up calls.
71 *
72 * Driver registers this routine to preallocate and initialize any
73 * internal data structures to bind the @qidx to its internal IO queues.
74 * A hardware queue maps (qidx) to a specific driver MSI-X vector/EQ/CQ/WQ.
75 *
76 * Return value :
77 * 0 - Success
78 * -EINVAL - Unsupported input value.
79 * -ENOMEM - Could not alloc necessary memory
80 **/
81 static int
lpfc_nvme_create_queue(struct nvme_fc_local_port * pnvme_lport,unsigned int qidx,u16 qsize,void ** handle)82 lpfc_nvme_create_queue(struct nvme_fc_local_port *pnvme_lport,
83 unsigned int qidx, u16 qsize,
84 void **handle)
85 {
86 struct lpfc_nvme_lport *lport;
87 struct lpfc_vport *vport;
88 struct lpfc_nvme_qhandle *qhandle;
89 char *str;
90
91 if (!pnvme_lport->private)
92 return -ENOMEM;
93
94 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
95 vport = lport->vport;
96
97 if (!vport || vport->load_flag & FC_UNLOADING ||
98 vport->phba->hba_flag & HBA_IOQ_FLUSH)
99 return -ENODEV;
100
101 qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
102 if (qhandle == NULL)
103 return -ENOMEM;
104
105 qhandle->cpu_id = raw_smp_processor_id();
106 qhandle->qidx = qidx;
107 /*
108 * NVME qidx == 0 is the admin queue, so both admin queue
109 * and first IO queue will use MSI-X vector and associated
110 * EQ/CQ/WQ at index 0. After that they are sequentially assigned.
111 */
112 if (qidx) {
113 str = "IO "; /* IO queue */
114 qhandle->index = ((qidx - 1) %
115 lpfc_nvme_template.max_hw_queues);
116 } else {
117 str = "ADM"; /* Admin queue */
118 qhandle->index = qidx;
119 }
120
121 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
122 "6073 Binding %s HdwQueue %d (cpu %d) to "
123 "hdw_queue %d qhandle x%px\n", str,
124 qidx, qhandle->cpu_id, qhandle->index, qhandle);
125 *handle = (void *)qhandle;
126 return 0;
127 }
128
129 /**
130 * lpfc_nvme_delete_queue -
131 * @pnvme_lport: Transport localport that LS is to be issued from
132 * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
133 * @handle: An opaque driver handle from lpfc_nvme_create_queue
134 *
135 * Driver registers this routine to free
136 * any internal data structures to bind the @qidx to its internal
137 * IO queues.
138 *
139 * Return value :
140 * 0 - Success
141 * TODO: What are the failure codes.
142 **/
143 static void
lpfc_nvme_delete_queue(struct nvme_fc_local_port * pnvme_lport,unsigned int qidx,void * handle)144 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
145 unsigned int qidx,
146 void *handle)
147 {
148 struct lpfc_nvme_lport *lport;
149 struct lpfc_vport *vport;
150
151 if (!pnvme_lport->private)
152 return;
153
154 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
155 vport = lport->vport;
156
157 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
158 "6001 ENTER. lpfc_pnvme x%px, qidx x%x qhandle x%px\n",
159 lport, qidx, handle);
160 kfree(handle);
161 }
162
163 static void
lpfc_nvme_localport_delete(struct nvme_fc_local_port * localport)164 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
165 {
166 struct lpfc_nvme_lport *lport = localport->private;
167
168 lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME,
169 "6173 localport x%px delete complete\n",
170 lport);
171
172 /* release any threads waiting for the unreg to complete */
173 if (lport->vport->localport)
174 complete(lport->lport_unreg_cmp);
175 }
176
177 /* lpfc_nvme_remoteport_delete
178 *
179 * @remoteport: Pointer to an nvme transport remoteport instance.
180 *
181 * This is a template downcall. NVME transport calls this function
182 * when it has completed the unregistration of a previously
183 * registered remoteport.
184 *
185 * Return value :
186 * None
187 */
188 static void
lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port * remoteport)189 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
190 {
191 struct lpfc_nvme_rport *rport = remoteport->private;
192 struct lpfc_vport *vport;
193 struct lpfc_nodelist *ndlp;
194 u32 fc4_xpt_flags;
195
196 ndlp = rport->ndlp;
197 if (!ndlp) {
198 pr_err("**** %s: NULL ndlp on rport x%px remoteport x%px\n",
199 __func__, rport, remoteport);
200 goto rport_err;
201 }
202
203 vport = ndlp->vport;
204 if (!vport) {
205 pr_err("**** %s: Null vport on ndlp x%px, ste x%x rport x%px\n",
206 __func__, ndlp, ndlp->nlp_state, rport);
207 goto rport_err;
208 }
209
210 fc4_xpt_flags = NVME_XPT_REGD | SCSI_XPT_REGD;
211
212 /* Remove this rport from the lport's list - memory is owned by the
213 * transport. Remove the ndlp reference for the NVME transport before
214 * calling state machine to remove the node.
215 */
216 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
217 "6146 remoteport delete of remoteport x%px, ndlp x%px "
218 "DID x%x xflags x%x\n",
219 remoteport, ndlp, ndlp->nlp_DID, ndlp->fc4_xpt_flags);
220 spin_lock_irq(&ndlp->lock);
221
222 /* The register rebind might have occurred before the delete
223 * downcall. Guard against this race.
224 */
225 if (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT)
226 ndlp->fc4_xpt_flags &= ~(NVME_XPT_UNREG_WAIT | NVME_XPT_REGD);
227
228 spin_unlock_irq(&ndlp->lock);
229
230 /* On a devloss timeout event, one more put is executed provided the
231 * NVME and SCSI rport unregister requests are complete. If the vport
232 * is unloading, this extra put is executed by lpfc_drop_node.
233 */
234 if (!(ndlp->fc4_xpt_flags & fc4_xpt_flags))
235 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
236
237 rport_err:
238 return;
239 }
240
241 /**
242 * lpfc_nvme_handle_lsreq - Process an unsolicited NVME LS request
243 * @phba: pointer to lpfc hba data structure.
244 * @axchg: pointer to exchange context for the NVME LS request
245 *
246 * This routine is used for processing an asychronously received NVME LS
247 * request. Any remaining validation is done and the LS is then forwarded
248 * to the nvme-fc transport via nvme_fc_rcv_ls_req().
249 *
250 * The calling sequence should be: nvme_fc_rcv_ls_req() -> (processing)
251 * -> lpfc_nvme_xmt_ls_rsp/cmp -> req->done.
252 * __lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
253 *
254 * Returns 0 if LS was handled and delivered to the transport
255 * Returns 1 if LS failed to be handled and should be dropped
256 */
257 int
lpfc_nvme_handle_lsreq(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * axchg)258 lpfc_nvme_handle_lsreq(struct lpfc_hba *phba,
259 struct lpfc_async_xchg_ctx *axchg)
260 {
261 #if (IS_ENABLED(CONFIG_NVME_FC))
262 struct lpfc_vport *vport;
263 struct lpfc_nvme_rport *lpfc_rport;
264 struct nvme_fc_remote_port *remoteport;
265 struct lpfc_nvme_lport *lport;
266 uint32_t *payload = axchg->payload;
267 int rc;
268
269 vport = axchg->ndlp->vport;
270 lpfc_rport = axchg->ndlp->nrport;
271 if (!lpfc_rport)
272 return -EINVAL;
273
274 remoteport = lpfc_rport->remoteport;
275 if (!vport->localport ||
276 vport->phba->hba_flag & HBA_IOQ_FLUSH)
277 return -EINVAL;
278
279 lport = vport->localport->private;
280 if (!lport)
281 return -EINVAL;
282
283 rc = nvme_fc_rcv_ls_req(remoteport, &axchg->ls_rsp, axchg->payload,
284 axchg->size);
285
286 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
287 "6205 NVME Unsol rcv: sz %d rc %d: %08x %08x %08x "
288 "%08x %08x %08x\n",
289 axchg->size, rc,
290 *payload, *(payload+1), *(payload+2),
291 *(payload+3), *(payload+4), *(payload+5));
292
293 if (!rc)
294 return 0;
295 #endif
296 return 1;
297 }
298
299 /**
300 * __lpfc_nvme_ls_req_cmp - Generic completion handler for a NVME
301 * LS request.
302 * @phba: Pointer to HBA context object
303 * @vport: The local port that issued the LS
304 * @cmdwqe: Pointer to driver command WQE object.
305 * @wcqe: Pointer to driver response CQE object.
306 *
307 * This function is the generic completion handler for NVME LS requests.
308 * The function updates any states and statistics, calls the transport
309 * ls_req done() routine, then tears down the command and buffers used
310 * for the LS request.
311 **/
312 void
__lpfc_nvme_ls_req_cmp(struct lpfc_hba * phba,struct lpfc_vport * vport,struct lpfc_iocbq * cmdwqe,struct lpfc_wcqe_complete * wcqe)313 __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_vport *vport,
314 struct lpfc_iocbq *cmdwqe,
315 struct lpfc_wcqe_complete *wcqe)
316 {
317 struct nvmefc_ls_req *pnvme_lsreq;
318 struct lpfc_dmabuf *buf_ptr;
319 struct lpfc_nodelist *ndlp;
320 uint32_t status;
321
322 pnvme_lsreq = cmdwqe->context_un.nvme_lsreq;
323 ndlp = cmdwqe->ndlp;
324 buf_ptr = cmdwqe->bpl_dmabuf;
325
326 status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
327
328 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
329 "6047 NVMEx LS REQ x%px cmpl DID %x Xri: %x "
330 "status %x reason x%x cmd:x%px lsreg:x%px bmp:x%px "
331 "ndlp:x%px\n",
332 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
333 cmdwqe->sli4_xritag, status,
334 (wcqe->parameter & 0xffff),
335 cmdwqe, pnvme_lsreq, cmdwqe->bpl_dmabuf,
336 ndlp);
337
338 lpfc_nvmeio_data(phba, "NVMEx LS CMPL: xri x%x stat x%x parm x%x\n",
339 cmdwqe->sli4_xritag, status, wcqe->parameter);
340
341 if (buf_ptr) {
342 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
343 kfree(buf_ptr);
344 cmdwqe->bpl_dmabuf = NULL;
345 }
346 if (pnvme_lsreq->done)
347 pnvme_lsreq->done(pnvme_lsreq, status);
348 else
349 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
350 "6046 NVMEx cmpl without done call back? "
351 "Data x%px DID %x Xri: %x status %x\n",
352 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
353 cmdwqe->sli4_xritag, status);
354 if (ndlp) {
355 lpfc_nlp_put(ndlp);
356 cmdwqe->ndlp = NULL;
357 }
358 lpfc_sli_release_iocbq(phba, cmdwqe);
359 }
360
361 static void
lpfc_nvme_ls_req_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)362 lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
363 struct lpfc_iocbq *rspwqe)
364 {
365 struct lpfc_vport *vport = cmdwqe->vport;
366 struct lpfc_nvme_lport *lport;
367 uint32_t status;
368 struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
369
370 status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
371
372 if (vport->localport) {
373 lport = (struct lpfc_nvme_lport *)vport->localport->private;
374 if (lport) {
375 atomic_inc(&lport->fc4NvmeLsCmpls);
376 if (status) {
377 if (bf_get(lpfc_wcqe_c_xb, wcqe))
378 atomic_inc(&lport->cmpl_ls_xb);
379 atomic_inc(&lport->cmpl_ls_err);
380 }
381 }
382 }
383
384 __lpfc_nvme_ls_req_cmp(phba, vport, cmdwqe, wcqe);
385 }
386
387 static int
lpfc_nvme_gen_req(struct lpfc_vport * vport,struct lpfc_dmabuf * bmp,struct lpfc_dmabuf * inp,struct nvmefc_ls_req * pnvme_lsreq,void (* cmpl)(struct lpfc_hba *,struct lpfc_iocbq *,struct lpfc_iocbq *),struct lpfc_nodelist * ndlp,uint32_t num_entry,uint32_t tmo,uint8_t retry)388 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
389 struct lpfc_dmabuf *inp,
390 struct nvmefc_ls_req *pnvme_lsreq,
391 void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
392 struct lpfc_iocbq *),
393 struct lpfc_nodelist *ndlp, uint32_t num_entry,
394 uint32_t tmo, uint8_t retry)
395 {
396 struct lpfc_hba *phba = vport->phba;
397 union lpfc_wqe128 *wqe;
398 struct lpfc_iocbq *genwqe;
399 struct ulp_bde64 *bpl;
400 struct ulp_bde64 bde;
401 int i, rc, xmit_len, first_len;
402
403 /* Allocate buffer for command WQE */
404 genwqe = lpfc_sli_get_iocbq(phba);
405 if (genwqe == NULL)
406 return 1;
407
408 wqe = &genwqe->wqe;
409 /* Initialize only 64 bytes */
410 memset(wqe, 0, sizeof(union lpfc_wqe));
411
412 genwqe->bpl_dmabuf = bmp;
413 genwqe->cmd_flag |= LPFC_IO_NVME_LS;
414
415 /* Save for completion so we can release these resources */
416 genwqe->ndlp = lpfc_nlp_get(ndlp);
417 if (!genwqe->ndlp) {
418 dev_warn(&phba->pcidev->dev,
419 "Warning: Failed node ref, not sending LS_REQ\n");
420 lpfc_sli_release_iocbq(phba, genwqe);
421 return 1;
422 }
423
424 genwqe->context_un.nvme_lsreq = pnvme_lsreq;
425 /* Fill in payload, bp points to frame payload */
426
427 if (!tmo)
428 /* FC spec states we need 3 * ratov for CT requests */
429 tmo = (3 * phba->fc_ratov);
430
431 /* For this command calculate the xmit length of the request bde. */
432 xmit_len = 0;
433 first_len = 0;
434 bpl = (struct ulp_bde64 *)bmp->virt;
435 for (i = 0; i < num_entry; i++) {
436 bde.tus.w = bpl[i].tus.w;
437 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
438 break;
439 xmit_len += bde.tus.f.bdeSize;
440 if (i == 0)
441 first_len = xmit_len;
442 }
443
444 genwqe->num_bdes = num_entry;
445 genwqe->hba_wqidx = 0;
446
447 /* Words 0 - 2 */
448 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
449 wqe->generic.bde.tus.f.bdeSize = first_len;
450 wqe->generic.bde.addrLow = bpl[0].addrLow;
451 wqe->generic.bde.addrHigh = bpl[0].addrHigh;
452
453 /* Word 3 */
454 wqe->gen_req.request_payload_len = first_len;
455
456 /* Word 4 */
457
458 /* Word 5 */
459 bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
460 bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
461 bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
462 bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
463 bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
464
465 /* Word 6 */
466 bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
467 phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
468 bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
469
470 /* Word 7 */
471 bf_set(wqe_tmo, &wqe->gen_req.wqe_com, tmo);
472 bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
473 bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
474 bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
475
476 /* Word 8 */
477 wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
478
479 /* Word 9 */
480 bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
481
482 /* Word 10 */
483 bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
484 bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
485 bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
486 bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
487 bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
488
489 /* Word 11 */
490 bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
491 bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
492
493
494 /* Issue GEN REQ WQE for NPORT <did> */
495 genwqe->cmd_cmpl = cmpl;
496 genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
497 genwqe->vport = vport;
498 genwqe->retry = retry;
499
500 lpfc_nvmeio_data(phba, "NVME LS XMIT: xri x%x iotag x%x to x%06x\n",
501 genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
502
503 rc = lpfc_sli4_issue_wqe(phba, &phba->sli4_hba.hdwq[0], genwqe);
504 if (rc) {
505 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
506 "6045 Issue GEN REQ WQE to NPORT x%x "
507 "Data: x%x x%x rc x%x\n",
508 ndlp->nlp_DID, genwqe->iotag,
509 vport->port_state, rc);
510 lpfc_nlp_put(ndlp);
511 lpfc_sli_release_iocbq(phba, genwqe);
512 return 1;
513 }
514
515 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_ELS,
516 "6050 Issue GEN REQ WQE to NPORT x%x "
517 "Data: oxid: x%x state: x%x wq:x%px lsreq:x%px "
518 "bmp:x%px xmit:%d 1st:%d\n",
519 ndlp->nlp_DID, genwqe->sli4_xritag,
520 vport->port_state,
521 genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
522 return 0;
523 }
524
525
526 /**
527 * __lpfc_nvme_ls_req - Generic service routine to issue an NVME LS request
528 * @vport: The local port issuing the LS
529 * @ndlp: The remote port to send the LS to
530 * @pnvme_lsreq: Pointer to LS request structure from the transport
531 * @gen_req_cmp: Completion call-back
532 *
533 * Routine validates the ndlp, builds buffers and sends a GEN_REQUEST
534 * WQE to perform the LS operation.
535 *
536 * Return value :
537 * 0 - Success
538 * non-zero: various error codes, in form of -Exxx
539 **/
540 int
__lpfc_nvme_ls_req(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,struct nvmefc_ls_req * pnvme_lsreq,void (* gen_req_cmp)(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe))541 __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
542 struct nvmefc_ls_req *pnvme_lsreq,
543 void (*gen_req_cmp)(struct lpfc_hba *phba,
544 struct lpfc_iocbq *cmdwqe,
545 struct lpfc_iocbq *rspwqe))
546 {
547 struct lpfc_dmabuf *bmp;
548 struct ulp_bde64 *bpl;
549 int ret;
550 uint16_t ntype, nstate;
551
552 if (!ndlp) {
553 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
554 "6051 NVMEx LS REQ: Bad NDLP x%px, Failing "
555 "LS Req\n",
556 ndlp);
557 return -ENODEV;
558 }
559
560 ntype = ndlp->nlp_type;
561 nstate = ndlp->nlp_state;
562 if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
563 (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
564 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
565 "6088 NVMEx LS REQ: Fail DID x%06x not "
566 "ready for IO. Type x%x, State x%x\n",
567 ndlp->nlp_DID, ntype, nstate);
568 return -ENODEV;
569 }
570 if (vport->phba->hba_flag & HBA_IOQ_FLUSH)
571 return -ENODEV;
572
573 if (!vport->phba->sli4_hba.nvmels_wq)
574 return -ENOMEM;
575
576 /*
577 * there are two dma buf in the request, actually there is one and
578 * the second one is just the start address + cmd size.
579 * Before calling lpfc_nvme_gen_req these buffers need to be wrapped
580 * in a lpfc_dmabuf struct. When freeing we just free the wrapper
581 * because the nvem layer owns the data bufs.
582 * We do not have to break these packets open, we don't care what is
583 * in them. And we do not have to look at the resonse data, we only
584 * care that we got a response. All of the caring is going to happen
585 * in the nvme-fc layer.
586 */
587
588 bmp = kmalloc(sizeof(*bmp), GFP_KERNEL);
589 if (!bmp) {
590 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
591 "6044 NVMEx LS REQ: Could not alloc LS buf "
592 "for DID %x\n",
593 ndlp->nlp_DID);
594 return -ENOMEM;
595 }
596
597 bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
598 if (!bmp->virt) {
599 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
600 "6042 NVMEx LS REQ: Could not alloc mbuf "
601 "for DID %x\n",
602 ndlp->nlp_DID);
603 kfree(bmp);
604 return -ENOMEM;
605 }
606
607 INIT_LIST_HEAD(&bmp->list);
608
609 bpl = (struct ulp_bde64 *)bmp->virt;
610 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
611 bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
612 bpl->tus.f.bdeFlags = 0;
613 bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
614 bpl->tus.w = le32_to_cpu(bpl->tus.w);
615 bpl++;
616
617 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
618 bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
619 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
620 bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
621 bpl->tus.w = le32_to_cpu(bpl->tus.w);
622
623 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
624 "6149 NVMEx LS REQ: Issue to DID 0x%06x lsreq x%px, "
625 "rqstlen:%d rsplen:%d %pad %pad\n",
626 ndlp->nlp_DID, pnvme_lsreq, pnvme_lsreq->rqstlen,
627 pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
628 &pnvme_lsreq->rspdma);
629
630 ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
631 pnvme_lsreq, gen_req_cmp, ndlp, 2,
632 pnvme_lsreq->timeout, 0);
633 if (ret != WQE_SUCCESS) {
634 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
635 "6052 NVMEx REQ: EXIT. issue ls wqe failed "
636 "lsreq x%px Status %x DID %x\n",
637 pnvme_lsreq, ret, ndlp->nlp_DID);
638 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
639 kfree(bmp);
640 return -EIO;
641 }
642
643 return 0;
644 }
645
646 /**
647 * lpfc_nvme_ls_req - Issue an NVME Link Service request
648 * @pnvme_lport: Transport localport that LS is to be issued from.
649 * @pnvme_rport: Transport remoteport that LS is to be sent to.
650 * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
651 *
652 * Driver registers this routine to handle any link service request
653 * from the nvme_fc transport to a remote nvme-aware port.
654 *
655 * Return value :
656 * 0 - Success
657 * non-zero: various error codes, in form of -Exxx
658 **/
659 static int
lpfc_nvme_ls_req(struct nvme_fc_local_port * pnvme_lport,struct nvme_fc_remote_port * pnvme_rport,struct nvmefc_ls_req * pnvme_lsreq)660 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
661 struct nvme_fc_remote_port *pnvme_rport,
662 struct nvmefc_ls_req *pnvme_lsreq)
663 {
664 struct lpfc_nvme_lport *lport;
665 struct lpfc_nvme_rport *rport;
666 struct lpfc_vport *vport;
667 int ret;
668
669 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
670 rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
671 if (unlikely(!lport) || unlikely(!rport))
672 return -EINVAL;
673
674 vport = lport->vport;
675 if (vport->load_flag & FC_UNLOADING ||
676 vport->phba->hba_flag & HBA_IOQ_FLUSH)
677 return -ENODEV;
678
679 atomic_inc(&lport->fc4NvmeLsRequests);
680
681 ret = __lpfc_nvme_ls_req(vport, rport->ndlp, pnvme_lsreq,
682 lpfc_nvme_ls_req_cmp);
683 if (ret)
684 atomic_inc(&lport->xmt_ls_err);
685
686 return ret;
687 }
688
689 /**
690 * __lpfc_nvme_ls_abort - Generic service routine to abort a prior
691 * NVME LS request
692 * @vport: The local port that issued the LS
693 * @ndlp: The remote port the LS was sent to
694 * @pnvme_lsreq: Pointer to LS request structure from the transport
695 *
696 * The driver validates the ndlp, looks for the LS, and aborts the
697 * LS if found.
698 *
699 * Returns:
700 * 0 : if LS found and aborted
701 * non-zero: various error conditions in form -Exxx
702 **/
703 int
__lpfc_nvme_ls_abort(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,struct nvmefc_ls_req * pnvme_lsreq)704 __lpfc_nvme_ls_abort(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
705 struct nvmefc_ls_req *pnvme_lsreq)
706 {
707 struct lpfc_hba *phba = vport->phba;
708 struct lpfc_sli_ring *pring;
709 struct lpfc_iocbq *wqe, *next_wqe;
710 bool foundit = false;
711
712 if (!ndlp) {
713 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
714 "6049 NVMEx LS REQ Abort: Bad NDLP x%px DID "
715 "x%06x, Failing LS Req\n",
716 ndlp, ndlp ? ndlp->nlp_DID : 0);
717 return -EINVAL;
718 }
719
720 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
721 "6040 NVMEx LS REQ Abort: Issue LS_ABORT for lsreq "
722 "x%px rqstlen:%d rsplen:%d %pad %pad\n",
723 pnvme_lsreq, pnvme_lsreq->rqstlen,
724 pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
725 &pnvme_lsreq->rspdma);
726
727 /*
728 * Lock the ELS ring txcmplq and look for the wqe that matches
729 * this ELS. If found, issue an abort on the wqe.
730 */
731 pring = phba->sli4_hba.nvmels_wq->pring;
732 spin_lock_irq(&phba->hbalock);
733 spin_lock(&pring->ring_lock);
734 list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
735 if (wqe->context_un.nvme_lsreq == pnvme_lsreq) {
736 wqe->cmd_flag |= LPFC_DRIVER_ABORTED;
737 foundit = true;
738 break;
739 }
740 }
741 spin_unlock(&pring->ring_lock);
742
743 if (foundit)
744 lpfc_sli_issue_abort_iotag(phba, pring, wqe, NULL);
745 spin_unlock_irq(&phba->hbalock);
746
747 if (foundit)
748 return 0;
749
750 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
751 "6213 NVMEx LS REQ Abort: Unable to locate req x%px\n",
752 pnvme_lsreq);
753 return -EINVAL;
754 }
755
756 static int
lpfc_nvme_xmt_ls_rsp(struct nvme_fc_local_port * localport,struct nvme_fc_remote_port * remoteport,struct nvmefc_ls_rsp * ls_rsp)757 lpfc_nvme_xmt_ls_rsp(struct nvme_fc_local_port *localport,
758 struct nvme_fc_remote_port *remoteport,
759 struct nvmefc_ls_rsp *ls_rsp)
760 {
761 struct lpfc_async_xchg_ctx *axchg =
762 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
763 struct lpfc_nvme_lport *lport;
764 int rc;
765
766 if (axchg->phba->pport->load_flag & FC_UNLOADING)
767 return -ENODEV;
768
769 lport = (struct lpfc_nvme_lport *)localport->private;
770
771 rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, __lpfc_nvme_xmt_ls_rsp_cmp);
772
773 if (rc) {
774 /*
775 * unless the failure is due to having already sent
776 * the response, an abort will be generated for the
777 * exchange if the rsp can't be sent.
778 */
779 if (rc != -EALREADY)
780 atomic_inc(&lport->xmt_ls_abort);
781 return rc;
782 }
783
784 return 0;
785 }
786
787 /**
788 * lpfc_nvme_ls_abort - Abort a prior NVME LS request
789 * @pnvme_lport: Transport localport that LS is to be issued from.
790 * @pnvme_rport: Transport remoteport that LS is to be sent to.
791 * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
792 *
793 * Driver registers this routine to abort a NVME LS request that is
794 * in progress (from the transports perspective).
795 **/
796 static void
lpfc_nvme_ls_abort(struct nvme_fc_local_port * pnvme_lport,struct nvme_fc_remote_port * pnvme_rport,struct nvmefc_ls_req * pnvme_lsreq)797 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
798 struct nvme_fc_remote_port *pnvme_rport,
799 struct nvmefc_ls_req *pnvme_lsreq)
800 {
801 struct lpfc_nvme_lport *lport;
802 struct lpfc_vport *vport;
803 struct lpfc_nodelist *ndlp;
804 int ret;
805
806 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
807 if (unlikely(!lport))
808 return;
809 vport = lport->vport;
810
811 if (vport->load_flag & FC_UNLOADING)
812 return;
813
814 ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
815
816 ret = __lpfc_nvme_ls_abort(vport, ndlp, pnvme_lsreq);
817 if (!ret)
818 atomic_inc(&lport->xmt_ls_abort);
819 }
820
821 /* Fix up the existing sgls for NVME IO. */
822 static inline void
lpfc_nvme_adj_fcp_sgls(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_ncmd,struct nvmefc_fcp_req * nCmd)823 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
824 struct lpfc_io_buf *lpfc_ncmd,
825 struct nvmefc_fcp_req *nCmd)
826 {
827 struct lpfc_hba *phba = vport->phba;
828 struct sli4_sge *sgl;
829 union lpfc_wqe128 *wqe;
830 uint32_t *wptr, *dptr;
831
832 /*
833 * Get a local pointer to the built-in wqe and correct
834 * the cmd size to match NVME's 96 bytes and fix
835 * the dma address.
836 */
837
838 wqe = &lpfc_ncmd->cur_iocbq.wqe;
839
840 /*
841 * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
842 * match NVME. NVME sends 96 bytes. Also, use the
843 * nvme commands command and response dma addresses
844 * rather than the virtual memory to ease the restore
845 * operation.
846 */
847 sgl = lpfc_ncmd->dma_sgl;
848 sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
849 if (phba->cfg_nvme_embed_cmd) {
850 sgl->addr_hi = 0;
851 sgl->addr_lo = 0;
852
853 /* Word 0-2 - NVME CMND IU (embedded payload) */
854 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
855 wqe->generic.bde.tus.f.bdeSize = 56;
856 wqe->generic.bde.addrHigh = 0;
857 wqe->generic.bde.addrLow = 64; /* Word 16 */
858
859 /* Word 10 - dbde is 0, wqes is 1 in template */
860
861 /*
862 * Embed the payload in the last half of the WQE
863 * WQE words 16-30 get the NVME CMD IU payload
864 *
865 * WQE words 16-19 get payload Words 1-4
866 * WQE words 20-21 get payload Words 6-7
867 * WQE words 22-29 get payload Words 16-23
868 */
869 wptr = &wqe->words[16]; /* WQE ptr */
870 dptr = (uint32_t *)nCmd->cmdaddr; /* payload ptr */
871 dptr++; /* Skip Word 0 in payload */
872
873 *wptr++ = *dptr++; /* Word 1 */
874 *wptr++ = *dptr++; /* Word 2 */
875 *wptr++ = *dptr++; /* Word 3 */
876 *wptr++ = *dptr++; /* Word 4 */
877 dptr++; /* Skip Word 5 in payload */
878 *wptr++ = *dptr++; /* Word 6 */
879 *wptr++ = *dptr++; /* Word 7 */
880 dptr += 8; /* Skip Words 8-15 in payload */
881 *wptr++ = *dptr++; /* Word 16 */
882 *wptr++ = *dptr++; /* Word 17 */
883 *wptr++ = *dptr++; /* Word 18 */
884 *wptr++ = *dptr++; /* Word 19 */
885 *wptr++ = *dptr++; /* Word 20 */
886 *wptr++ = *dptr++; /* Word 21 */
887 *wptr++ = *dptr++; /* Word 22 */
888 *wptr = *dptr; /* Word 23 */
889 } else {
890 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma));
891 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma));
892
893 /* Word 0-2 - NVME CMND IU Inline BDE */
894 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
895 wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen;
896 wqe->generic.bde.addrHigh = sgl->addr_hi;
897 wqe->generic.bde.addrLow = sgl->addr_lo;
898
899 /* Word 10 */
900 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
901 bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
902 }
903
904 sgl++;
905
906 /* Setup the physical region for the FCP RSP */
907 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
908 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
909 sgl->word2 = le32_to_cpu(sgl->word2);
910 if (nCmd->sg_cnt)
911 bf_set(lpfc_sli4_sge_last, sgl, 0);
912 else
913 bf_set(lpfc_sli4_sge_last, sgl, 1);
914 sgl->word2 = cpu_to_le32(sgl->word2);
915 sgl->sge_len = cpu_to_le32(nCmd->rsplen);
916 }
917
918
919 /*
920 * lpfc_nvme_io_cmd_cmpl - Complete an NVME-over-FCP IO
921 *
922 * Driver registers this routine as it io request handler. This
923 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
924 * data structure to the rport indicated in @lpfc_nvme_rport.
925 *
926 * Return value :
927 * 0 - Success
928 * TODO: What are the failure codes.
929 **/
930 static void
lpfc_nvme_io_cmd_cmpl(struct lpfc_hba * phba,struct lpfc_iocbq * pwqeIn,struct lpfc_iocbq * pwqeOut)931 lpfc_nvme_io_cmd_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
932 struct lpfc_iocbq *pwqeOut)
933 {
934 struct lpfc_io_buf *lpfc_ncmd = pwqeIn->io_buf;
935 struct lpfc_wcqe_complete *wcqe = &pwqeOut->wcqe_cmpl;
936 struct lpfc_vport *vport = pwqeIn->vport;
937 struct nvmefc_fcp_req *nCmd;
938 struct nvme_fc_ersp_iu *ep;
939 struct nvme_fc_cmd_iu *cp;
940 struct lpfc_nodelist *ndlp;
941 struct lpfc_nvme_fcpreq_priv *freqpriv;
942 struct lpfc_nvme_lport *lport;
943 uint32_t code, status, idx;
944 uint16_t cid, sqhd, data;
945 uint32_t *ptr;
946 uint32_t lat;
947 bool call_done = false;
948 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
949 int cpu;
950 #endif
951 int offline = 0;
952
953 /* Sanity check on return of outstanding command */
954 if (!lpfc_ncmd) {
955 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
956 "6071 Null lpfc_ncmd pointer. No "
957 "release, skip completion\n");
958 return;
959 }
960
961 /* Guard against abort handler being called at same time */
962 spin_lock(&lpfc_ncmd->buf_lock);
963
964 if (!lpfc_ncmd->nvmeCmd) {
965 spin_unlock(&lpfc_ncmd->buf_lock);
966 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
967 "6066 Missing cmpl ptrs: lpfc_ncmd x%px, "
968 "nvmeCmd x%px\n",
969 lpfc_ncmd, lpfc_ncmd->nvmeCmd);
970
971 /* Release the lpfc_ncmd regardless of the missing elements. */
972 lpfc_release_nvme_buf(phba, lpfc_ncmd);
973 return;
974 }
975 nCmd = lpfc_ncmd->nvmeCmd;
976 status = bf_get(lpfc_wcqe_c_status, wcqe);
977
978 idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
979 phba->sli4_hba.hdwq[idx].nvme_cstat.io_cmpls++;
980
981 if (unlikely(status && vport->localport)) {
982 lport = (struct lpfc_nvme_lport *)vport->localport->private;
983 if (lport) {
984 if (bf_get(lpfc_wcqe_c_xb, wcqe))
985 atomic_inc(&lport->cmpl_fcp_xb);
986 atomic_inc(&lport->cmpl_fcp_err);
987 }
988 }
989
990 lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
991 lpfc_ncmd->cur_iocbq.sli4_xritag,
992 status, wcqe->parameter);
993 /*
994 * Catch race where our node has transitioned, but the
995 * transport is still transitioning.
996 */
997 ndlp = lpfc_ncmd->ndlp;
998 if (!ndlp) {
999 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1000 "6062 Ignoring NVME cmpl. No ndlp\n");
1001 goto out_err;
1002 }
1003
1004 code = bf_get(lpfc_wcqe_c_code, wcqe);
1005 if (code == CQE_CODE_NVME_ERSP) {
1006 /* For this type of CQE, we need to rebuild the rsp */
1007 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
1008
1009 /*
1010 * Get Command Id from cmd to plug into response. This
1011 * code is not needed in the next NVME Transport drop.
1012 */
1013 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
1014 cid = cp->sqe.common.command_id;
1015
1016 /*
1017 * RSN is in CQE word 2
1018 * SQHD is in CQE Word 3 bits 15:0
1019 * Cmd Specific info is in CQE Word 1
1020 * and in CQE Word 0 bits 15:0
1021 */
1022 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
1023
1024 /* Now lets build the NVME ERSP IU */
1025 ep->iu_len = cpu_to_be16(8);
1026 ep->rsn = wcqe->parameter;
1027 ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
1028 ep->rsvd12 = 0;
1029 ptr = (uint32_t *)&ep->cqe.result.u64;
1030 *ptr++ = wcqe->total_data_placed;
1031 data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
1032 *ptr = (uint32_t)data;
1033 ep->cqe.sq_head = sqhd;
1034 ep->cqe.sq_id = nCmd->sqid;
1035 ep->cqe.command_id = cid;
1036 ep->cqe.status = 0;
1037
1038 lpfc_ncmd->status = IOSTAT_SUCCESS;
1039 lpfc_ncmd->result = 0;
1040 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
1041 nCmd->transferred_length = nCmd->payload_length;
1042 } else {
1043 lpfc_ncmd->status = (status & LPFC_IOCB_STATUS_MASK);
1044 lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
1045
1046 /* For NVME, the only failure path that results in an
1047 * IO error is when the adapter rejects it. All other
1048 * conditions are a success case and resolved by the
1049 * transport.
1050 * IOSTAT_FCP_RSP_ERROR means:
1051 * 1. Length of data received doesn't match total
1052 * transfer length in WQE
1053 * 2. If the RSP payload does NOT match these cases:
1054 * a. RSP length 12/24 bytes and all zeros
1055 * b. NVME ERSP
1056 */
1057 switch (lpfc_ncmd->status) {
1058 case IOSTAT_SUCCESS:
1059 nCmd->transferred_length = wcqe->total_data_placed;
1060 nCmd->rcv_rsplen = 0;
1061 nCmd->status = 0;
1062 break;
1063 case IOSTAT_FCP_RSP_ERROR:
1064 nCmd->transferred_length = wcqe->total_data_placed;
1065 nCmd->rcv_rsplen = wcqe->parameter;
1066 nCmd->status = 0;
1067
1068 /* Get the NVME cmd details for this unique error. */
1069 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
1070 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
1071
1072 /* Check if this is really an ERSP */
1073 if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN) {
1074 lpfc_ncmd->status = IOSTAT_SUCCESS;
1075 lpfc_ncmd->result = 0;
1076
1077 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1078 "6084 NVME FCP_ERR ERSP: "
1079 "xri %x placed x%x opcode x%x cmd_id "
1080 "x%x cqe_status x%x\n",
1081 lpfc_ncmd->cur_iocbq.sli4_xritag,
1082 wcqe->total_data_placed,
1083 cp->sqe.common.opcode,
1084 cp->sqe.common.command_id,
1085 ep->cqe.status);
1086 break;
1087 }
1088 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1089 "6081 NVME Completion Protocol Error: "
1090 "xri %x status x%x result x%x "
1091 "placed x%x opcode x%x cmd_id x%x, "
1092 "cqe_status x%x\n",
1093 lpfc_ncmd->cur_iocbq.sli4_xritag,
1094 lpfc_ncmd->status, lpfc_ncmd->result,
1095 wcqe->total_data_placed,
1096 cp->sqe.common.opcode,
1097 cp->sqe.common.command_id,
1098 ep->cqe.status);
1099 break;
1100 case IOSTAT_LOCAL_REJECT:
1101 /* Let fall through to set command final state. */
1102 if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
1103 lpfc_printf_vlog(vport, KERN_INFO,
1104 LOG_NVME_IOERR,
1105 "6032 Delay Aborted cmd x%px "
1106 "nvme cmd x%px, xri x%x, "
1107 "xb %d\n",
1108 lpfc_ncmd, nCmd,
1109 lpfc_ncmd->cur_iocbq.sli4_xritag,
1110 bf_get(lpfc_wcqe_c_xb, wcqe));
1111 fallthrough;
1112 default:
1113 out_err:
1114 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1115 "6072 NVME Completion Error: xri %x "
1116 "status x%x result x%x [x%x] "
1117 "placed x%x\n",
1118 lpfc_ncmd->cur_iocbq.sli4_xritag,
1119 lpfc_ncmd->status, lpfc_ncmd->result,
1120 wcqe->parameter,
1121 wcqe->total_data_placed);
1122 nCmd->transferred_length = 0;
1123 nCmd->rcv_rsplen = 0;
1124 nCmd->status = NVME_SC_INTERNAL;
1125 offline = pci_channel_offline(vport->phba->pcidev);
1126 }
1127 }
1128
1129 /* pick up SLI4 exhange busy condition */
1130 if (bf_get(lpfc_wcqe_c_xb, wcqe) && !offline)
1131 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1132 else
1133 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1134
1135 /* Update stats and complete the IO. There is
1136 * no need for dma unprep because the nvme_transport
1137 * owns the dma address.
1138 */
1139 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1140 if (lpfc_ncmd->ts_cmd_start) {
1141 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
1142 lpfc_ncmd->ts_data_io = ktime_get_ns();
1143 phba->ktime_last_cmd = lpfc_ncmd->ts_data_io;
1144 lpfc_io_ktime(phba, lpfc_ncmd);
1145 }
1146 if (unlikely(phba->hdwqstat_on & LPFC_CHECK_NVME_IO)) {
1147 cpu = raw_smp_processor_id();
1148 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
1149 if (lpfc_ncmd->cpu != cpu)
1150 lpfc_printf_vlog(vport,
1151 KERN_INFO, LOG_NVME_IOERR,
1152 "6701 CPU Check cmpl: "
1153 "cpu %d expect %d\n",
1154 cpu, lpfc_ncmd->cpu);
1155 }
1156 #endif
1157
1158 /* NVME targets need completion held off until the abort exchange
1159 * completes unless the NVME Rport is getting unregistered.
1160 */
1161
1162 if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
1163 freqpriv = nCmd->private;
1164 freqpriv->nvme_buf = NULL;
1165 lpfc_ncmd->nvmeCmd = NULL;
1166 call_done = true;
1167 }
1168 spin_unlock(&lpfc_ncmd->buf_lock);
1169
1170 /* Check if IO qualified for CMF */
1171 if (phba->cmf_active_mode != LPFC_CFG_OFF &&
1172 nCmd->io_dir == NVMEFC_FCP_READ &&
1173 nCmd->payload_length) {
1174 /* Used when calculating average latency */
1175 lat = ktime_get_ns() - lpfc_ncmd->rx_cmd_start;
1176 lpfc_update_cmf_cmpl(phba, lat, nCmd->payload_length, NULL);
1177 }
1178
1179 if (call_done)
1180 nCmd->done(nCmd);
1181
1182 /* Call release with XB=1 to queue the IO into the abort list. */
1183 lpfc_release_nvme_buf(phba, lpfc_ncmd);
1184 }
1185
1186
1187 /**
1188 * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
1189 * @vport: pointer to a host virtual N_Port data structure
1190 * @lpfc_ncmd: Pointer to lpfc scsi command
1191 * @pnode: pointer to a node-list data structure
1192 * @cstat: pointer to the control status structure
1193 *
1194 * Driver registers this routine as it io request handler. This
1195 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1196 * data structure to the rport indicated in @lpfc_nvme_rport.
1197 *
1198 * Return value :
1199 * 0 - Success
1200 * TODO: What are the failure codes.
1201 **/
1202 static int
lpfc_nvme_prep_io_cmd(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_ncmd,struct lpfc_nodelist * pnode,struct lpfc_fc4_ctrl_stat * cstat)1203 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
1204 struct lpfc_io_buf *lpfc_ncmd,
1205 struct lpfc_nodelist *pnode,
1206 struct lpfc_fc4_ctrl_stat *cstat)
1207 {
1208 struct lpfc_hba *phba = vport->phba;
1209 struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1210 struct nvme_common_command *sqe;
1211 struct lpfc_iocbq *pwqeq = &lpfc_ncmd->cur_iocbq;
1212 union lpfc_wqe128 *wqe = &pwqeq->wqe;
1213 uint32_t req_len;
1214
1215 /*
1216 * There are three possibilities here - use scatter-gather segment, use
1217 * the single mapping, or neither.
1218 */
1219 if (nCmd->sg_cnt) {
1220 if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
1221 /* From the iwrite template, initialize words 7 - 11 */
1222 memcpy(&wqe->words[7],
1223 &lpfc_iwrite_cmd_template.words[7],
1224 sizeof(uint32_t) * 5);
1225
1226 /* Word 4 */
1227 wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length;
1228
1229 /* Word 5 */
1230 if ((phba->cfg_nvme_enable_fb) &&
1231 (pnode->nlp_flag & NLP_FIRSTBURST)) {
1232 req_len = lpfc_ncmd->nvmeCmd->payload_length;
1233 if (req_len < pnode->nvme_fb_size)
1234 wqe->fcp_iwrite.initial_xfer_len =
1235 req_len;
1236 else
1237 wqe->fcp_iwrite.initial_xfer_len =
1238 pnode->nvme_fb_size;
1239 } else {
1240 wqe->fcp_iwrite.initial_xfer_len = 0;
1241 }
1242 cstat->output_requests++;
1243 } else {
1244 /* From the iread template, initialize words 7 - 11 */
1245 memcpy(&wqe->words[7],
1246 &lpfc_iread_cmd_template.words[7],
1247 sizeof(uint32_t) * 5);
1248
1249 /* Word 4 */
1250 wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
1251
1252 /* Word 5 */
1253 wqe->fcp_iread.rsrvd5 = 0;
1254
1255 /* For a CMF Managed port, iod must be zero'ed */
1256 if (phba->cmf_active_mode == LPFC_CFG_MANAGED)
1257 bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
1258 LPFC_WQE_IOD_NONE);
1259 cstat->input_requests++;
1260 }
1261 } else {
1262 /* From the icmnd template, initialize words 4 - 11 */
1263 memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
1264 sizeof(uint32_t) * 8);
1265 cstat->control_requests++;
1266 }
1267
1268 if (pnode->nlp_nvme_info & NLP_NVME_NSLER) {
1269 bf_set(wqe_erp, &wqe->generic.wqe_com, 1);
1270 sqe = &((struct nvme_fc_cmd_iu *)
1271 nCmd->cmdaddr)->sqe.common;
1272 if (sqe->opcode == nvme_admin_async_event)
1273 bf_set(wqe_ffrq, &wqe->generic.wqe_com, 1);
1274 }
1275
1276 /*
1277 * Finish initializing those WQE fields that are independent
1278 * of the nvme_cmnd request_buffer
1279 */
1280
1281 /* Word 3 */
1282 bf_set(payload_offset_len, &wqe->fcp_icmd,
1283 (nCmd->rsplen + nCmd->cmdlen));
1284
1285 /* Word 6 */
1286 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
1287 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
1288 bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
1289
1290 /* Word 8 */
1291 wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
1292
1293 /* Word 9 */
1294 bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
1295
1296 /* Word 10 */
1297 bf_set(wqe_xchg, &wqe->fcp_iwrite.wqe_com, LPFC_NVME_XCHG);
1298
1299 /* Words 13 14 15 are for PBDE support */
1300
1301 /* add the VMID tags as per switch response */
1302 if (unlikely(lpfc_ncmd->cur_iocbq.cmd_flag & LPFC_IO_VMID)) {
1303 if (phba->pport->vmid_priority_tagging) {
1304 bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1);
1305 bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com,
1306 lpfc_ncmd->cur_iocbq.vmid_tag.cs_ctl_vmid);
1307 } else {
1308 bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1);
1309 bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
1310 wqe->words[31] = lpfc_ncmd->cur_iocbq.vmid_tag.app_id;
1311 }
1312 }
1313
1314 pwqeq->vport = vport;
1315 return 0;
1316 }
1317
1318
1319 /**
1320 * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
1321 * @vport: pointer to a host virtual N_Port data structure
1322 * @lpfc_ncmd: Pointer to lpfc scsi command
1323 *
1324 * Driver registers this routine as it io request handler. This
1325 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1326 * data structure to the rport indicated in @lpfc_nvme_rport.
1327 *
1328 * Return value :
1329 * 0 - Success
1330 * TODO: What are the failure codes.
1331 **/
1332 static int
lpfc_nvme_prep_io_dma(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_ncmd)1333 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
1334 struct lpfc_io_buf *lpfc_ncmd)
1335 {
1336 struct lpfc_hba *phba = vport->phba;
1337 struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1338 union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe;
1339 struct sli4_sge *sgl = lpfc_ncmd->dma_sgl;
1340 struct sli4_hybrid_sgl *sgl_xtra = NULL;
1341 struct scatterlist *data_sg;
1342 struct sli4_sge *first_data_sgl;
1343 struct ulp_bde64 *bde;
1344 dma_addr_t physaddr = 0;
1345 uint32_t dma_len = 0;
1346 uint32_t dma_offset = 0;
1347 int nseg, i, j;
1348 bool lsp_just_set = false;
1349
1350 /* Fix up the command and response DMA stuff. */
1351 lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
1352
1353 /*
1354 * There are three possibilities here - use scatter-gather segment, use
1355 * the single mapping, or neither.
1356 */
1357 if (nCmd->sg_cnt) {
1358 /*
1359 * Jump over the cmd and rsp SGEs. The fix routine
1360 * has already adjusted for this.
1361 */
1362 sgl += 2;
1363
1364 first_data_sgl = sgl;
1365 lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
1366 if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) {
1367 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1368 "6058 Too many sg segments from "
1369 "NVME Transport. Max %d, "
1370 "nvmeIO sg_cnt %d\n",
1371 phba->cfg_nvme_seg_cnt + 1,
1372 lpfc_ncmd->seg_cnt);
1373 lpfc_ncmd->seg_cnt = 0;
1374 return 1;
1375 }
1376
1377 /*
1378 * The driver established a maximum scatter-gather segment count
1379 * during probe that limits the number of sg elements in any
1380 * single nvme command. Just run through the seg_cnt and format
1381 * the sge's.
1382 */
1383 nseg = nCmd->sg_cnt;
1384 data_sg = nCmd->first_sgl;
1385
1386 /* for tracking the segment boundaries */
1387 j = 2;
1388 for (i = 0; i < nseg; i++) {
1389 if (data_sg == NULL) {
1390 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1391 "6059 dptr err %d, nseg %d\n",
1392 i, nseg);
1393 lpfc_ncmd->seg_cnt = 0;
1394 return 1;
1395 }
1396
1397 sgl->word2 = 0;
1398 if (nseg == 1) {
1399 bf_set(lpfc_sli4_sge_last, sgl, 1);
1400 bf_set(lpfc_sli4_sge_type, sgl,
1401 LPFC_SGE_TYPE_DATA);
1402 } else {
1403 bf_set(lpfc_sli4_sge_last, sgl, 0);
1404
1405 /* expand the segment */
1406 if (!lsp_just_set &&
1407 !((j + 1) % phba->border_sge_num) &&
1408 ((nseg - 1) != i)) {
1409 /* set LSP type */
1410 bf_set(lpfc_sli4_sge_type, sgl,
1411 LPFC_SGE_TYPE_LSP);
1412
1413 sgl_xtra = lpfc_get_sgl_per_hdwq(
1414 phba, lpfc_ncmd);
1415
1416 if (unlikely(!sgl_xtra)) {
1417 lpfc_ncmd->seg_cnt = 0;
1418 return 1;
1419 }
1420 sgl->addr_lo = cpu_to_le32(putPaddrLow(
1421 sgl_xtra->dma_phys_sgl));
1422 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
1423 sgl_xtra->dma_phys_sgl));
1424
1425 } else {
1426 bf_set(lpfc_sli4_sge_type, sgl,
1427 LPFC_SGE_TYPE_DATA);
1428 }
1429 }
1430
1431 if (!(bf_get(lpfc_sli4_sge_type, sgl) &
1432 LPFC_SGE_TYPE_LSP)) {
1433 if ((nseg - 1) == i)
1434 bf_set(lpfc_sli4_sge_last, sgl, 1);
1435
1436 physaddr = sg_dma_address(data_sg);
1437 dma_len = sg_dma_len(data_sg);
1438 sgl->addr_lo = cpu_to_le32(
1439 putPaddrLow(physaddr));
1440 sgl->addr_hi = cpu_to_le32(
1441 putPaddrHigh(physaddr));
1442
1443 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1444 sgl->word2 = cpu_to_le32(sgl->word2);
1445 sgl->sge_len = cpu_to_le32(dma_len);
1446
1447 dma_offset += dma_len;
1448 data_sg = sg_next(data_sg);
1449
1450 sgl++;
1451
1452 lsp_just_set = false;
1453 } else {
1454 sgl->word2 = cpu_to_le32(sgl->word2);
1455
1456 sgl->sge_len = cpu_to_le32(
1457 phba->cfg_sg_dma_buf_size);
1458
1459 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
1460 i = i - 1;
1461
1462 lsp_just_set = true;
1463 }
1464
1465 j++;
1466 }
1467
1468 /* PBDE support for first data SGE only */
1469 if (nseg == 1 && phba->cfg_enable_pbde) {
1470 /* Words 13-15 */
1471 bde = (struct ulp_bde64 *)
1472 &wqe->words[13];
1473 bde->addrLow = first_data_sgl->addr_lo;
1474 bde->addrHigh = first_data_sgl->addr_hi;
1475 bde->tus.f.bdeSize =
1476 le32_to_cpu(first_data_sgl->sge_len);
1477 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1478 bde->tus.w = cpu_to_le32(bde->tus.w);
1479
1480 /* Word 11 - set PBDE bit */
1481 bf_set(wqe_pbde, &wqe->generic.wqe_com, 1);
1482 } else {
1483 memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
1484 /* Word 11 - PBDE bit disabled by default template */
1485 }
1486
1487 } else {
1488 lpfc_ncmd->seg_cnt = 0;
1489
1490 /* For this clause to be valid, the payload_length
1491 * and sg_cnt must zero.
1492 */
1493 if (nCmd->payload_length != 0) {
1494 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1495 "6063 NVME DMA Prep Err: sg_cnt %d "
1496 "payload_length x%x\n",
1497 nCmd->sg_cnt, nCmd->payload_length);
1498 return 1;
1499 }
1500 }
1501 return 0;
1502 }
1503
1504 /**
1505 * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
1506 * @pnvme_lport: Pointer to the driver's local port data
1507 * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1508 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1509 * @pnvme_fcreq: IO request from nvme fc to driver.
1510 *
1511 * Driver registers this routine as it io request handler. This
1512 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1513 * data structure to the rport indicated in @lpfc_nvme_rport.
1514 *
1515 * Return value :
1516 * 0 - Success
1517 * TODO: What are the failure codes.
1518 **/
1519 static int
lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port * pnvme_lport,struct nvme_fc_remote_port * pnvme_rport,void * hw_queue_handle,struct nvmefc_fcp_req * pnvme_fcreq)1520 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
1521 struct nvme_fc_remote_port *pnvme_rport,
1522 void *hw_queue_handle,
1523 struct nvmefc_fcp_req *pnvme_fcreq)
1524 {
1525 int ret = 0;
1526 int expedite = 0;
1527 int idx, cpu;
1528 struct lpfc_nvme_lport *lport;
1529 struct lpfc_fc4_ctrl_stat *cstat;
1530 struct lpfc_vport *vport;
1531 struct lpfc_hba *phba;
1532 struct lpfc_nodelist *ndlp;
1533 struct lpfc_io_buf *lpfc_ncmd;
1534 struct lpfc_nvme_rport *rport;
1535 struct lpfc_nvme_qhandle *lpfc_queue_info;
1536 struct lpfc_nvme_fcpreq_priv *freqpriv;
1537 struct nvme_common_command *sqe;
1538 uint64_t start = 0;
1539 #if (IS_ENABLED(CONFIG_NVME_FC))
1540 u8 *uuid = NULL;
1541 int err;
1542 enum dma_data_direction iodir;
1543 #endif
1544
1545 /* Validate pointers. LLDD fault handling with transport does
1546 * have timing races.
1547 */
1548 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1549 if (unlikely(!lport)) {
1550 ret = -EINVAL;
1551 goto out_fail;
1552 }
1553
1554 vport = lport->vport;
1555
1556 if (unlikely(!hw_queue_handle)) {
1557 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1558 "6117 Fail IO, NULL hw_queue_handle\n");
1559 atomic_inc(&lport->xmt_fcp_err);
1560 ret = -EBUSY;
1561 goto out_fail;
1562 }
1563
1564 phba = vport->phba;
1565
1566 if ((unlikely(vport->load_flag & FC_UNLOADING)) ||
1567 phba->hba_flag & HBA_IOQ_FLUSH) {
1568 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1569 "6124 Fail IO, Driver unload\n");
1570 atomic_inc(&lport->xmt_fcp_err);
1571 ret = -ENODEV;
1572 goto out_fail;
1573 }
1574
1575 freqpriv = pnvme_fcreq->private;
1576 if (unlikely(!freqpriv)) {
1577 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1578 "6158 Fail IO, NULL request data\n");
1579 atomic_inc(&lport->xmt_fcp_err);
1580 ret = -EINVAL;
1581 goto out_fail;
1582 }
1583
1584 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1585 if (phba->ktime_on)
1586 start = ktime_get_ns();
1587 #endif
1588 rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1589 lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
1590
1591 /*
1592 * Catch race where our node has transitioned, but the
1593 * transport is still transitioning.
1594 */
1595 ndlp = rport->ndlp;
1596 if (!ndlp) {
1597 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1598 "6053 Busy IO, ndlp not ready: rport x%px "
1599 "ndlp x%px, DID x%06x\n",
1600 rport, ndlp, pnvme_rport->port_id);
1601 atomic_inc(&lport->xmt_fcp_err);
1602 ret = -EBUSY;
1603 goto out_fail;
1604 }
1605
1606 /* The remote node has to be a mapped target or it's an error. */
1607 if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
1608 (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
1609 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1610 "6036 Fail IO, DID x%06x not ready for "
1611 "IO. State x%x, Type x%x Flg x%x\n",
1612 pnvme_rport->port_id,
1613 ndlp->nlp_state, ndlp->nlp_type,
1614 ndlp->fc4_xpt_flags);
1615 atomic_inc(&lport->xmt_fcp_bad_ndlp);
1616 ret = -EBUSY;
1617 goto out_fail;
1618
1619 }
1620
1621 /* Currently only NVME Keep alive commands should be expedited
1622 * if the driver runs out of a resource. These should only be
1623 * issued on the admin queue, qidx 0
1624 */
1625 if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) {
1626 sqe = &((struct nvme_fc_cmd_iu *)
1627 pnvme_fcreq->cmdaddr)->sqe.common;
1628 if (sqe->opcode == nvme_admin_keep_alive)
1629 expedite = 1;
1630 }
1631
1632 /* Check if IO qualifies for CMF */
1633 if (phba->cmf_active_mode != LPFC_CFG_OFF &&
1634 pnvme_fcreq->io_dir == NVMEFC_FCP_READ &&
1635 pnvme_fcreq->payload_length) {
1636 ret = lpfc_update_cmf_cmd(phba, pnvme_fcreq->payload_length);
1637 if (ret) {
1638 ret = -EBUSY;
1639 goto out_fail;
1640 }
1641 /* Get start time for IO latency */
1642 start = ktime_get_ns();
1643 }
1644
1645 /* The node is shared with FCP IO, make sure the IO pending count does
1646 * not exceed the programmed depth.
1647 */
1648 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
1649 if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) &&
1650 !expedite) {
1651 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1652 "6174 Fail IO, ndlp qdepth exceeded: "
1653 "idx %d DID %x pend %d qdepth %d\n",
1654 lpfc_queue_info->index, ndlp->nlp_DID,
1655 atomic_read(&ndlp->cmd_pending),
1656 ndlp->cmd_qdepth);
1657 atomic_inc(&lport->xmt_fcp_qdepth);
1658 ret = -EBUSY;
1659 goto out_fail1;
1660 }
1661 }
1662
1663 /* Lookup Hardware Queue index based on fcp_io_sched module parameter */
1664 if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
1665 idx = lpfc_queue_info->index;
1666 } else {
1667 cpu = raw_smp_processor_id();
1668 idx = phba->sli4_hba.cpu_map[cpu].hdwq;
1669 }
1670
1671 lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, idx, expedite);
1672 if (lpfc_ncmd == NULL) {
1673 atomic_inc(&lport->xmt_fcp_noxri);
1674 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1675 "6065 Fail IO, driver buffer pool is empty: "
1676 "idx %d DID %x\n",
1677 lpfc_queue_info->index, ndlp->nlp_DID);
1678 ret = -EBUSY;
1679 goto out_fail1;
1680 }
1681 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1682 if (start) {
1683 lpfc_ncmd->ts_cmd_start = start;
1684 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
1685 } else {
1686 lpfc_ncmd->ts_cmd_start = 0;
1687 }
1688 #endif
1689 lpfc_ncmd->rx_cmd_start = start;
1690
1691 /*
1692 * Store the data needed by the driver to issue, abort, and complete
1693 * an IO.
1694 * Do not let the IO hang out forever. There is no midlayer issuing
1695 * an abort so inform the FW of the maximum IO pending time.
1696 */
1697 freqpriv->nvme_buf = lpfc_ncmd;
1698 lpfc_ncmd->nvmeCmd = pnvme_fcreq;
1699 lpfc_ncmd->ndlp = ndlp;
1700 lpfc_ncmd->qidx = lpfc_queue_info->qidx;
1701
1702 #if (IS_ENABLED(CONFIG_NVME_FC))
1703 /* check the necessary and sufficient condition to support VMID */
1704 if (lpfc_is_vmid_enabled(phba) &&
1705 (ndlp->vmid_support ||
1706 phba->pport->vmid_priority_tagging ==
1707 LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
1708 /* is the I/O generated by a VM, get the associated virtual */
1709 /* entity id */
1710 uuid = nvme_fc_io_getuuid(pnvme_fcreq);
1711
1712 if (uuid) {
1713 if (pnvme_fcreq->io_dir == NVMEFC_FCP_WRITE)
1714 iodir = DMA_TO_DEVICE;
1715 else if (pnvme_fcreq->io_dir == NVMEFC_FCP_READ)
1716 iodir = DMA_FROM_DEVICE;
1717 else
1718 iodir = DMA_NONE;
1719
1720 err = lpfc_vmid_get_appid(vport, uuid, iodir,
1721 (union lpfc_vmid_io_tag *)
1722 &lpfc_ncmd->cur_iocbq.vmid_tag);
1723 if (!err)
1724 lpfc_ncmd->cur_iocbq.cmd_flag |= LPFC_IO_VMID;
1725 }
1726 }
1727 #endif
1728
1729 /*
1730 * Issue the IO on the WQ indicated by index in the hw_queue_handle.
1731 * This identfier was create in our hardware queue create callback
1732 * routine. The driver now is dependent on the IO queue steering from
1733 * the transport. We are trusting the upper NVME layers know which
1734 * index to use and that they have affinitized a CPU to this hardware
1735 * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
1736 */
1737 lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
1738 cstat = &phba->sli4_hba.hdwq[idx].nvme_cstat;
1739
1740 lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat);
1741 ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
1742 if (ret) {
1743 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1744 "6175 Fail IO, Prep DMA: "
1745 "idx %d DID %x\n",
1746 lpfc_queue_info->index, ndlp->nlp_DID);
1747 atomic_inc(&lport->xmt_fcp_err);
1748 ret = -ENOMEM;
1749 goto out_free_nvme_buf;
1750 }
1751
1752 lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
1753 lpfc_ncmd->cur_iocbq.sli4_xritag,
1754 lpfc_queue_info->index, ndlp->nlp_DID);
1755
1756 ret = lpfc_sli4_issue_wqe(phba, lpfc_ncmd->hdwq, &lpfc_ncmd->cur_iocbq);
1757 if (ret) {
1758 atomic_inc(&lport->xmt_fcp_wqerr);
1759 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1760 "6113 Fail IO, Could not issue WQE err %x "
1761 "sid: x%x did: x%x oxid: x%x\n",
1762 ret, vport->fc_myDID, ndlp->nlp_DID,
1763 lpfc_ncmd->cur_iocbq.sli4_xritag);
1764 goto out_free_nvme_buf;
1765 }
1766
1767 if (phba->cfg_xri_rebalancing)
1768 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_ncmd->hdwq_no);
1769
1770 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1771 if (lpfc_ncmd->ts_cmd_start)
1772 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
1773
1774 if (phba->hdwqstat_on & LPFC_CHECK_NVME_IO) {
1775 cpu = raw_smp_processor_id();
1776 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1777 lpfc_ncmd->cpu = cpu;
1778 if (idx != cpu)
1779 lpfc_printf_vlog(vport,
1780 KERN_INFO, LOG_NVME_IOERR,
1781 "6702 CPU Check cmd: "
1782 "cpu %d wq %d\n",
1783 lpfc_ncmd->cpu,
1784 lpfc_queue_info->index);
1785 }
1786 #endif
1787 return 0;
1788
1789 out_free_nvme_buf:
1790 if (lpfc_ncmd->nvmeCmd->sg_cnt) {
1791 if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
1792 cstat->output_requests--;
1793 else
1794 cstat->input_requests--;
1795 } else
1796 cstat->control_requests--;
1797 lpfc_release_nvme_buf(phba, lpfc_ncmd);
1798 out_fail1:
1799 lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT,
1800 pnvme_fcreq->payload_length, NULL);
1801 out_fail:
1802 return ret;
1803 }
1804
1805 /**
1806 * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
1807 * @phba: Pointer to HBA context object
1808 * @cmdiocb: Pointer to command iocb object.
1809 * @rspiocb: Pointer to response iocb object.
1810 *
1811 * This is the callback function for any NVME FCP IO that was aborted.
1812 *
1813 * Return value:
1814 * None
1815 **/
1816 void
lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)1817 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1818 struct lpfc_iocbq *rspiocb)
1819 {
1820 struct lpfc_wcqe_complete *abts_cmpl = &rspiocb->wcqe_cmpl;
1821
1822 lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1823 "6145 ABORT_XRI_CN completing on rpi x%x "
1824 "original iotag x%x, abort cmd iotag x%x "
1825 "req_tag x%x, status x%x, hwstatus x%x\n",
1826 bf_get(wqe_ctxt_tag, &cmdiocb->wqe.generic.wqe_com),
1827 get_job_abtsiotag(phba, cmdiocb), cmdiocb->iotag,
1828 bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
1829 bf_get(lpfc_wcqe_c_status, abts_cmpl),
1830 bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
1831 lpfc_sli_release_iocbq(phba, cmdiocb);
1832 }
1833
1834 /**
1835 * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
1836 * @pnvme_lport: Pointer to the driver's local port data
1837 * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1838 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1839 * @pnvme_fcreq: IO request from nvme fc to driver.
1840 *
1841 * Driver registers this routine as its nvme request io abort handler. This
1842 * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
1843 * data structure to the rport indicated in @lpfc_nvme_rport. This routine
1844 * is executed asynchronously - one the target is validated as "MAPPED" and
1845 * ready for IO, the driver issues the abort request and returns.
1846 *
1847 * Return value:
1848 * None
1849 **/
1850 static void
lpfc_nvme_fcp_abort(struct nvme_fc_local_port * pnvme_lport,struct nvme_fc_remote_port * pnvme_rport,void * hw_queue_handle,struct nvmefc_fcp_req * pnvme_fcreq)1851 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
1852 struct nvme_fc_remote_port *pnvme_rport,
1853 void *hw_queue_handle,
1854 struct nvmefc_fcp_req *pnvme_fcreq)
1855 {
1856 struct lpfc_nvme_lport *lport;
1857 struct lpfc_vport *vport;
1858 struct lpfc_hba *phba;
1859 struct lpfc_io_buf *lpfc_nbuf;
1860 struct lpfc_iocbq *nvmereq_wqe;
1861 struct lpfc_nvme_fcpreq_priv *freqpriv;
1862 unsigned long flags;
1863 int ret_val;
1864 struct nvme_fc_cmd_iu *cp;
1865
1866 /* Validate pointers. LLDD fault handling with transport does
1867 * have timing races.
1868 */
1869 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1870 if (unlikely(!lport))
1871 return;
1872
1873 vport = lport->vport;
1874
1875 if (unlikely(!hw_queue_handle)) {
1876 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1877 "6129 Fail Abort, HW Queue Handle NULL.\n");
1878 return;
1879 }
1880
1881 phba = vport->phba;
1882 freqpriv = pnvme_fcreq->private;
1883
1884 if (unlikely(!freqpriv))
1885 return;
1886 if (vport->load_flag & FC_UNLOADING)
1887 return;
1888
1889 /* Announce entry to new IO submit field. */
1890 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1891 "6002 Abort Request to rport DID x%06x "
1892 "for nvme_fc_req x%px\n",
1893 pnvme_rport->port_id,
1894 pnvme_fcreq);
1895
1896 /* If the hba is getting reset, this flag is set. It is
1897 * cleared when the reset is complete and rings reestablished.
1898 */
1899 spin_lock_irqsave(&phba->hbalock, flags);
1900 /* driver queued commands are in process of being flushed */
1901 if (phba->hba_flag & HBA_IOQ_FLUSH) {
1902 spin_unlock_irqrestore(&phba->hbalock, flags);
1903 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1904 "6139 Driver in reset cleanup - flushing "
1905 "NVME Req now. hba_flag x%x\n",
1906 phba->hba_flag);
1907 return;
1908 }
1909
1910 lpfc_nbuf = freqpriv->nvme_buf;
1911 if (!lpfc_nbuf) {
1912 spin_unlock_irqrestore(&phba->hbalock, flags);
1913 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1914 "6140 NVME IO req has no matching lpfc nvme "
1915 "io buffer. Skipping abort req.\n");
1916 return;
1917 } else if (!lpfc_nbuf->nvmeCmd) {
1918 spin_unlock_irqrestore(&phba->hbalock, flags);
1919 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1920 "6141 lpfc NVME IO req has no nvme_fcreq "
1921 "io buffer. Skipping abort req.\n");
1922 return;
1923 }
1924 nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
1925
1926 /* Guard against IO completion being called at same time */
1927 spin_lock(&lpfc_nbuf->buf_lock);
1928
1929 /*
1930 * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
1931 * state must match the nvme_fcreq passed by the nvme
1932 * transport. If they don't match, it is likely the driver
1933 * has already completed the NVME IO and the nvme transport
1934 * has not seen it yet.
1935 */
1936 if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
1937 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1938 "6143 NVME req mismatch: "
1939 "lpfc_nbuf x%px nvmeCmd x%px, "
1940 "pnvme_fcreq x%px. Skipping Abort xri x%x\n",
1941 lpfc_nbuf, lpfc_nbuf->nvmeCmd,
1942 pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1943 goto out_unlock;
1944 }
1945
1946 /* Don't abort IOs no longer on the pending queue. */
1947 if (!(nvmereq_wqe->cmd_flag & LPFC_IO_ON_TXCMPLQ)) {
1948 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1949 "6142 NVME IO req x%px not queued - skipping "
1950 "abort req xri x%x\n",
1951 pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1952 goto out_unlock;
1953 }
1954
1955 atomic_inc(&lport->xmt_fcp_abort);
1956 lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
1957 nvmereq_wqe->sli4_xritag,
1958 nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
1959
1960 /* Outstanding abort is in progress */
1961 if (nvmereq_wqe->cmd_flag & LPFC_DRIVER_ABORTED) {
1962 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1963 "6144 Outstanding NVME I/O Abort Request "
1964 "still pending on nvme_fcreq x%px, "
1965 "lpfc_ncmd x%px xri x%x\n",
1966 pnvme_fcreq, lpfc_nbuf,
1967 nvmereq_wqe->sli4_xritag);
1968 goto out_unlock;
1969 }
1970
1971 ret_val = lpfc_sli4_issue_abort_iotag(phba, nvmereq_wqe,
1972 lpfc_nvme_abort_fcreq_cmpl);
1973
1974 spin_unlock(&lpfc_nbuf->buf_lock);
1975 spin_unlock_irqrestore(&phba->hbalock, flags);
1976
1977 /* Make sure HBA is alive */
1978 lpfc_issue_hb_tmo(phba);
1979
1980 if (ret_val != WQE_SUCCESS) {
1981 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1982 "6137 Failed abts issue_wqe with status x%x "
1983 "for nvme_fcreq x%px.\n",
1984 ret_val, pnvme_fcreq);
1985 return;
1986 }
1987
1988 /*
1989 * Get Command Id from cmd to plug into response. This
1990 * code is not needed in the next NVME Transport drop.
1991 */
1992 cp = (struct nvme_fc_cmd_iu *)lpfc_nbuf->nvmeCmd->cmdaddr;
1993 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1994 "6138 Transport Abort NVME Request Issued for "
1995 "ox_id x%x nvme opcode x%x nvme cmd_id x%x\n",
1996 nvmereq_wqe->sli4_xritag, cp->sqe.common.opcode,
1997 cp->sqe.common.command_id);
1998 return;
1999
2000 out_unlock:
2001 spin_unlock(&lpfc_nbuf->buf_lock);
2002 spin_unlock_irqrestore(&phba->hbalock, flags);
2003 return;
2004 }
2005
2006 /* Declare and initialization an instance of the FC NVME template. */
2007 static struct nvme_fc_port_template lpfc_nvme_template = {
2008 /* initiator-based functions */
2009 .localport_delete = lpfc_nvme_localport_delete,
2010 .remoteport_delete = lpfc_nvme_remoteport_delete,
2011 .create_queue = lpfc_nvme_create_queue,
2012 .delete_queue = lpfc_nvme_delete_queue,
2013 .ls_req = lpfc_nvme_ls_req,
2014 .fcp_io = lpfc_nvme_fcp_io_submit,
2015 .ls_abort = lpfc_nvme_ls_abort,
2016 .fcp_abort = lpfc_nvme_fcp_abort,
2017 .xmt_ls_rsp = lpfc_nvme_xmt_ls_rsp,
2018
2019 .max_hw_queues = 1,
2020 .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
2021 .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
2022 .dma_boundary = 0xFFFFFFFF,
2023
2024 /* Sizes of additional private data for data structures.
2025 * No use for the last two sizes at this time.
2026 */
2027 .local_priv_sz = sizeof(struct lpfc_nvme_lport),
2028 .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
2029 .lsrqst_priv_sz = 0,
2030 .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
2031 };
2032
2033 /*
2034 * lpfc_get_nvme_buf - Get a nvme buffer from io_buf_list of the HBA
2035 *
2036 * This routine removes a nvme buffer from head of @hdwq io_buf_list
2037 * and returns to caller.
2038 *
2039 * Return codes:
2040 * NULL - Error
2041 * Pointer to lpfc_nvme_buf - Success
2042 **/
2043 static struct lpfc_io_buf *
lpfc_get_nvme_buf(struct lpfc_hba * phba,struct lpfc_nodelist * ndlp,int idx,int expedite)2044 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
2045 int idx, int expedite)
2046 {
2047 struct lpfc_io_buf *lpfc_ncmd;
2048 struct lpfc_sli4_hdw_queue *qp;
2049 struct sli4_sge *sgl;
2050 struct lpfc_iocbq *pwqeq;
2051 union lpfc_wqe128 *wqe;
2052
2053 lpfc_ncmd = lpfc_get_io_buf(phba, NULL, idx, expedite);
2054
2055 if (lpfc_ncmd) {
2056 pwqeq = &(lpfc_ncmd->cur_iocbq);
2057 wqe = &pwqeq->wqe;
2058
2059 /* Setup key fields in buffer that may have been changed
2060 * if other protocols used this buffer.
2061 */
2062 pwqeq->cmd_flag = LPFC_IO_NVME;
2063 pwqeq->cmd_cmpl = lpfc_nvme_io_cmd_cmpl;
2064 lpfc_ncmd->start_time = jiffies;
2065 lpfc_ncmd->flags = 0;
2066
2067 /* Rsp SGE will be filled in when we rcv an IO
2068 * from the NVME Layer to be sent.
2069 * The cmd is going to be embedded so we need a SKIP SGE.
2070 */
2071 sgl = lpfc_ncmd->dma_sgl;
2072 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2073 bf_set(lpfc_sli4_sge_last, sgl, 0);
2074 sgl->word2 = cpu_to_le32(sgl->word2);
2075 /* Fill in word 3 / sgl_len during cmd submission */
2076
2077 /* Initialize 64 bytes only */
2078 memset(wqe, 0, sizeof(union lpfc_wqe));
2079
2080 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
2081 atomic_inc(&ndlp->cmd_pending);
2082 lpfc_ncmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
2083 }
2084
2085 } else {
2086 qp = &phba->sli4_hba.hdwq[idx];
2087 qp->empty_io_bufs++;
2088 }
2089
2090 return lpfc_ncmd;
2091 }
2092
2093 /**
2094 * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
2095 * @phba: The Hba for which this call is being executed.
2096 * @lpfc_ncmd: The nvme buffer which is being released.
2097 *
2098 * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
2099 * lpfc_io_buf_list list. For SLI4 XRI's are tied to the nvme buffer
2100 * and cannot be reused for at least RA_TOV amount of time if it was
2101 * aborted.
2102 **/
2103 static void
lpfc_release_nvme_buf(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_ncmd)2104 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_ncmd)
2105 {
2106 struct lpfc_sli4_hdw_queue *qp;
2107 unsigned long iflag = 0;
2108
2109 if ((lpfc_ncmd->flags & LPFC_SBUF_BUMP_QDEPTH) && lpfc_ncmd->ndlp)
2110 atomic_dec(&lpfc_ncmd->ndlp->cmd_pending);
2111
2112 lpfc_ncmd->ndlp = NULL;
2113 lpfc_ncmd->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
2114
2115 qp = lpfc_ncmd->hdwq;
2116 if (unlikely(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
2117 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2118 "6310 XB release deferred for "
2119 "ox_id x%x on reqtag x%x\n",
2120 lpfc_ncmd->cur_iocbq.sli4_xritag,
2121 lpfc_ncmd->cur_iocbq.iotag);
2122
2123 spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
2124 list_add_tail(&lpfc_ncmd->list,
2125 &qp->lpfc_abts_io_buf_list);
2126 qp->abts_nvme_io_bufs++;
2127 spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
2128 } else
2129 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)lpfc_ncmd, qp);
2130 }
2131
2132 /**
2133 * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
2134 * @vport: the lpfc_vport instance requesting a localport.
2135 *
2136 * This routine is invoked to create an nvme localport instance to bind
2137 * to the nvme_fc_transport. It is called once during driver load
2138 * like lpfc_create_shost after all other services are initialized.
2139 * It requires a vport, vpi, and wwns at call time. Other localport
2140 * parameters are modified as the driver's FCID and the Fabric WWN
2141 * are established.
2142 *
2143 * Return codes
2144 * 0 - successful
2145 * -ENOMEM - no heap memory available
2146 * other values - from nvme registration upcall
2147 **/
2148 int
lpfc_nvme_create_localport(struct lpfc_vport * vport)2149 lpfc_nvme_create_localport(struct lpfc_vport *vport)
2150 {
2151 int ret = 0;
2152 struct lpfc_hba *phba = vport->phba;
2153 struct nvme_fc_port_info nfcp_info;
2154 struct nvme_fc_local_port *localport;
2155 struct lpfc_nvme_lport *lport;
2156
2157 /* Initialize this localport instance. The vport wwn usage ensures
2158 * that NPIV is accounted for.
2159 */
2160 memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
2161 nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
2162 nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
2163 nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
2164
2165 /* We need to tell the transport layer + 1 because it takes page
2166 * alignment into account. When space for the SGL is allocated we
2167 * allocate + 3, one for cmd, one for rsp and one for this alignment
2168 */
2169 lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
2170
2171 /* Advertise how many hw queues we support based on cfg_hdw_queue,
2172 * which will not exceed cpu count.
2173 */
2174 lpfc_nvme_template.max_hw_queues = phba->cfg_hdw_queue;
2175
2176 if (!IS_ENABLED(CONFIG_NVME_FC))
2177 return ret;
2178
2179 /* localport is allocated from the stack, but the registration
2180 * call allocates heap memory as well as the private area.
2181 */
2182
2183 ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
2184 &vport->phba->pcidev->dev, &localport);
2185 if (!ret) {
2186 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
2187 "6005 Successfully registered local "
2188 "NVME port num %d, localP x%px, private "
2189 "x%px, sg_seg %d\n",
2190 localport->port_num, localport,
2191 localport->private,
2192 lpfc_nvme_template.max_sgl_segments);
2193
2194 /* Private is our lport size declared in the template. */
2195 lport = (struct lpfc_nvme_lport *)localport->private;
2196 vport->localport = localport;
2197 lport->vport = vport;
2198 vport->nvmei_support = 1;
2199
2200 atomic_set(&lport->xmt_fcp_noxri, 0);
2201 atomic_set(&lport->xmt_fcp_bad_ndlp, 0);
2202 atomic_set(&lport->xmt_fcp_qdepth, 0);
2203 atomic_set(&lport->xmt_fcp_err, 0);
2204 atomic_set(&lport->xmt_fcp_wqerr, 0);
2205 atomic_set(&lport->xmt_fcp_abort, 0);
2206 atomic_set(&lport->xmt_ls_abort, 0);
2207 atomic_set(&lport->xmt_ls_err, 0);
2208 atomic_set(&lport->cmpl_fcp_xb, 0);
2209 atomic_set(&lport->cmpl_fcp_err, 0);
2210 atomic_set(&lport->cmpl_ls_xb, 0);
2211 atomic_set(&lport->cmpl_ls_err, 0);
2212
2213 atomic_set(&lport->fc4NvmeLsRequests, 0);
2214 atomic_set(&lport->fc4NvmeLsCmpls, 0);
2215 }
2216
2217 return ret;
2218 }
2219
2220 #if (IS_ENABLED(CONFIG_NVME_FC))
2221 /* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg.
2222 *
2223 * The driver has to wait for the host nvme transport to callback
2224 * indicating the localport has successfully unregistered all
2225 * resources. Since this is an uninterruptible wait, loop every ten
2226 * seconds and print a message indicating no progress.
2227 *
2228 * An uninterruptible wait is used because of the risk of transport-to-
2229 * driver state mismatch.
2230 */
2231 static void
lpfc_nvme_lport_unreg_wait(struct lpfc_vport * vport,struct lpfc_nvme_lport * lport,struct completion * lport_unreg_cmp)2232 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
2233 struct lpfc_nvme_lport *lport,
2234 struct completion *lport_unreg_cmp)
2235 {
2236 u32 wait_tmo;
2237 int ret, i, pending = 0;
2238 struct lpfc_sli_ring *pring;
2239 struct lpfc_hba *phba = vport->phba;
2240 struct lpfc_sli4_hdw_queue *qp;
2241 int abts_scsi, abts_nvme;
2242
2243 /* Host transport has to clean up and confirm requiring an indefinite
2244 * wait. Print a message if a 10 second wait expires and renew the
2245 * wait. This is unexpected.
2246 */
2247 wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000);
2248 while (true) {
2249 ret = wait_for_completion_timeout(lport_unreg_cmp, wait_tmo);
2250 if (unlikely(!ret)) {
2251 pending = 0;
2252 abts_scsi = 0;
2253 abts_nvme = 0;
2254 for (i = 0; i < phba->cfg_hdw_queue; i++) {
2255 qp = &phba->sli4_hba.hdwq[i];
2256 if (!vport->localport || !qp || !qp->io_wq)
2257 return;
2258
2259 pring = qp->io_wq->pring;
2260 if (!pring)
2261 continue;
2262 pending += pring->txcmplq_cnt;
2263 abts_scsi += qp->abts_scsi_io_bufs;
2264 abts_nvme += qp->abts_nvme_io_bufs;
2265 }
2266 if (!vport->localport ||
2267 test_bit(HBA_PCI_ERR, &vport->phba->bit_flags) ||
2268 vport->load_flag & FC_UNLOADING)
2269 return;
2270
2271 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2272 "6176 Lport x%px Localport x%px wait "
2273 "timed out. Pending %d [%d:%d]. "
2274 "Renewing.\n",
2275 lport, vport->localport, pending,
2276 abts_scsi, abts_nvme);
2277 continue;
2278 }
2279 break;
2280 }
2281 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
2282 "6177 Lport x%px Localport x%px Complete Success\n",
2283 lport, vport->localport);
2284 }
2285 #endif
2286
2287 /**
2288 * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
2289 * @vport: pointer to a host virtual N_Port data structure
2290 *
2291 * This routine is invoked to destroy all lports bound to the phba.
2292 * The lport memory was allocated by the nvme fc transport and is
2293 * released there. This routine ensures all rports bound to the
2294 * lport have been disconnected.
2295 *
2296 **/
2297 void
lpfc_nvme_destroy_localport(struct lpfc_vport * vport)2298 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
2299 {
2300 #if (IS_ENABLED(CONFIG_NVME_FC))
2301 struct nvme_fc_local_port *localport;
2302 struct lpfc_nvme_lport *lport;
2303 int ret;
2304 DECLARE_COMPLETION_ONSTACK(lport_unreg_cmp);
2305
2306 if (vport->nvmei_support == 0)
2307 return;
2308
2309 localport = vport->localport;
2310 if (!localport)
2311 return;
2312 lport = (struct lpfc_nvme_lport *)localport->private;
2313
2314 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2315 "6011 Destroying NVME localport x%px\n",
2316 localport);
2317
2318 /* lport's rport list is clear. Unregister
2319 * lport and release resources.
2320 */
2321 lport->lport_unreg_cmp = &lport_unreg_cmp;
2322 ret = nvme_fc_unregister_localport(localport);
2323
2324 /* Wait for completion. This either blocks
2325 * indefinitely or succeeds
2326 */
2327 lpfc_nvme_lport_unreg_wait(vport, lport, &lport_unreg_cmp);
2328 vport->localport = NULL;
2329
2330 /* Regardless of the unregister upcall response, clear
2331 * nvmei_support. All rports are unregistered and the
2332 * driver will clean up.
2333 */
2334 vport->nvmei_support = 0;
2335 if (ret == 0) {
2336 lpfc_printf_vlog(vport,
2337 KERN_INFO, LOG_NVME_DISC,
2338 "6009 Unregistered lport Success\n");
2339 } else {
2340 lpfc_printf_vlog(vport,
2341 KERN_INFO, LOG_NVME_DISC,
2342 "6010 Unregistered lport "
2343 "Failed, status x%x\n",
2344 ret);
2345 }
2346 #endif
2347 }
2348
2349 void
lpfc_nvme_update_localport(struct lpfc_vport * vport)2350 lpfc_nvme_update_localport(struct lpfc_vport *vport)
2351 {
2352 #if (IS_ENABLED(CONFIG_NVME_FC))
2353 struct nvme_fc_local_port *localport;
2354 struct lpfc_nvme_lport *lport;
2355
2356 localport = vport->localport;
2357 if (!localport) {
2358 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2359 "6710 Update NVME fail. No localport\n");
2360 return;
2361 }
2362 lport = (struct lpfc_nvme_lport *)localport->private;
2363 if (!lport) {
2364 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2365 "6171 Update NVME fail. localP x%px, No lport\n",
2366 localport);
2367 return;
2368 }
2369 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2370 "6012 Update NVME lport x%px did x%x\n",
2371 localport, vport->fc_myDID);
2372
2373 localport->port_id = vport->fc_myDID;
2374 if (localport->port_id == 0)
2375 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
2376 else
2377 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
2378
2379 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2380 "6030 bound lport x%px to DID x%06x\n",
2381 lport, localport->port_id);
2382 #endif
2383 }
2384
2385 int
lpfc_nvme_register_port(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)2386 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2387 {
2388 #if (IS_ENABLED(CONFIG_NVME_FC))
2389 int ret = 0;
2390 struct nvme_fc_local_port *localport;
2391 struct lpfc_nvme_lport *lport;
2392 struct lpfc_nvme_rport *rport;
2393 struct lpfc_nvme_rport *oldrport;
2394 struct nvme_fc_remote_port *remote_port;
2395 struct nvme_fc_port_info rpinfo;
2396 struct lpfc_nodelist *prev_ndlp = NULL;
2397 struct fc_rport *srport = ndlp->rport;
2398
2399 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2400 "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
2401 ndlp->nlp_DID, ndlp->nlp_type);
2402
2403 localport = vport->localport;
2404 if (!localport)
2405 return 0;
2406
2407 lport = (struct lpfc_nvme_lport *)localport->private;
2408
2409 /* NVME rports are not preserved across devloss.
2410 * Just register this instance. Note, rpinfo->dev_loss_tmo
2411 * is left 0 to indicate accept transport defaults. The
2412 * driver communicates port role capabilities consistent
2413 * with the PRLI response data.
2414 */
2415 memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
2416 rpinfo.port_id = ndlp->nlp_DID;
2417 if (ndlp->nlp_type & NLP_NVME_TARGET)
2418 rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
2419 if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2420 rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
2421
2422 if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
2423 rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
2424
2425 rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
2426 rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
2427 if (srport)
2428 rpinfo.dev_loss_tmo = srport->dev_loss_tmo;
2429 else
2430 rpinfo.dev_loss_tmo = vport->cfg_devloss_tmo;
2431
2432 spin_lock_irq(&ndlp->lock);
2433
2434 /* If an oldrport exists, so does the ndlp reference. If not
2435 * a new reference is needed because either the node has never
2436 * been registered or it's been unregistered and getting deleted.
2437 */
2438 oldrport = lpfc_ndlp_get_nrport(ndlp);
2439 if (oldrport) {
2440 prev_ndlp = oldrport->ndlp;
2441 spin_unlock_irq(&ndlp->lock);
2442 } else {
2443 spin_unlock_irq(&ndlp->lock);
2444 if (!lpfc_nlp_get(ndlp)) {
2445 dev_warn(&vport->phba->pcidev->dev,
2446 "Warning - No node ref - exit register\n");
2447 return 0;
2448 }
2449 }
2450
2451 ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
2452 if (!ret) {
2453 /* If the ndlp already has an nrport, this is just
2454 * a resume of the existing rport. Else this is a
2455 * new rport.
2456 */
2457 /* Guard against an unregister/reregister
2458 * race that leaves the WAIT flag set.
2459 */
2460 spin_lock_irq(&ndlp->lock);
2461 ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
2462 ndlp->fc4_xpt_flags |= NVME_XPT_REGD;
2463 spin_unlock_irq(&ndlp->lock);
2464 rport = remote_port->private;
2465 if (oldrport) {
2466
2467 /* Sever the ndlp<->rport association
2468 * before dropping the ndlp ref from
2469 * register.
2470 */
2471 spin_lock_irq(&ndlp->lock);
2472 ndlp->nrport = NULL;
2473 ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
2474 spin_unlock_irq(&ndlp->lock);
2475 rport->ndlp = NULL;
2476 rport->remoteport = NULL;
2477
2478 /* Reference only removed if previous NDLP is no longer
2479 * active. It might be just a swap and removing the
2480 * reference would cause a premature cleanup.
2481 */
2482 if (prev_ndlp && prev_ndlp != ndlp) {
2483 if (!prev_ndlp->nrport)
2484 lpfc_nlp_put(prev_ndlp);
2485 }
2486 }
2487
2488 /* Clean bind the rport to the ndlp. */
2489 rport->remoteport = remote_port;
2490 rport->lport = lport;
2491 rport->ndlp = ndlp;
2492 spin_lock_irq(&ndlp->lock);
2493 ndlp->nrport = rport;
2494 spin_unlock_irq(&ndlp->lock);
2495 lpfc_printf_vlog(vport, KERN_INFO,
2496 LOG_NVME_DISC | LOG_NODE,
2497 "6022 Bind lport x%px to remoteport x%px "
2498 "rport x%px WWNN 0x%llx, "
2499 "Rport WWPN 0x%llx DID "
2500 "x%06x Role x%x, ndlp %p prev_ndlp x%px\n",
2501 lport, remote_port, rport,
2502 rpinfo.node_name, rpinfo.port_name,
2503 rpinfo.port_id, rpinfo.port_role,
2504 ndlp, prev_ndlp);
2505 } else {
2506 lpfc_printf_vlog(vport, KERN_ERR,
2507 LOG_TRACE_EVENT,
2508 "6031 RemotePort Registration failed "
2509 "err: %d, DID x%06x\n",
2510 ret, ndlp->nlp_DID);
2511 }
2512
2513 return ret;
2514 #else
2515 return 0;
2516 #endif
2517 }
2518
2519 /*
2520 * lpfc_nvme_rescan_port - Check to see if we should rescan this remoteport
2521 *
2522 * If the ndlp represents an NVME Target, that we are logged into,
2523 * ping the NVME FC Transport layer to initiate a device rescan
2524 * on this remote NPort.
2525 */
2526 void
lpfc_nvme_rescan_port(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)2527 lpfc_nvme_rescan_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2528 {
2529 #if (IS_ENABLED(CONFIG_NVME_FC))
2530 struct lpfc_nvme_rport *nrport;
2531 struct nvme_fc_remote_port *remoteport = NULL;
2532
2533 spin_lock_irq(&ndlp->lock);
2534 nrport = lpfc_ndlp_get_nrport(ndlp);
2535 if (nrport)
2536 remoteport = nrport->remoteport;
2537 spin_unlock_irq(&ndlp->lock);
2538
2539 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2540 "6170 Rescan NPort DID x%06x type x%x "
2541 "state x%x nrport x%px remoteport x%px\n",
2542 ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_state,
2543 nrport, remoteport);
2544
2545 if (!nrport || !remoteport)
2546 goto rescan_exit;
2547
2548 /* Rescan an NVME target in MAPPED state with DISCOVERY role set */
2549 if (remoteport->port_role & FC_PORT_ROLE_NVME_DISCOVERY &&
2550 ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
2551 nvme_fc_rescan_remoteport(remoteport);
2552
2553 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2554 "6172 NVME rescanned DID x%06x "
2555 "port_state x%x\n",
2556 ndlp->nlp_DID, remoteport->port_state);
2557 }
2558 return;
2559 rescan_exit:
2560 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2561 "6169 Skip NVME Rport Rescan, NVME remoteport "
2562 "unregistered\n");
2563 #endif
2564 }
2565
2566 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
2567 *
2568 * There is no notion of Devloss or rport recovery from the current
2569 * nvme_transport perspective. Loss of an rport just means IO cannot
2570 * be sent and recovery is completely up to the initator.
2571 * For now, the driver just unbinds the DID and port_role so that
2572 * no further IO can be issued. Changes are planned for later.
2573 *
2574 * Notes - the ndlp reference count is not decremented here since
2575 * since there is no nvme_transport api for devloss. Node ref count
2576 * is only adjusted in driver unload.
2577 */
2578 void
lpfc_nvme_unregister_port(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)2579 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2580 {
2581 #if (IS_ENABLED(CONFIG_NVME_FC))
2582 int ret;
2583 struct nvme_fc_local_port *localport;
2584 struct lpfc_nvme_lport *lport;
2585 struct lpfc_nvme_rport *rport;
2586 struct nvme_fc_remote_port *remoteport = NULL;
2587
2588 localport = vport->localport;
2589
2590 /* This is fundamental error. The localport is always
2591 * available until driver unload. Just exit.
2592 */
2593 if (!localport)
2594 return;
2595
2596 lport = (struct lpfc_nvme_lport *)localport->private;
2597 if (!lport)
2598 goto input_err;
2599
2600 spin_lock_irq(&ndlp->lock);
2601 rport = lpfc_ndlp_get_nrport(ndlp);
2602 if (rport)
2603 remoteport = rport->remoteport;
2604 spin_unlock_irq(&ndlp->lock);
2605 if (!remoteport)
2606 goto input_err;
2607
2608 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2609 "6033 Unreg nvme remoteport x%px, portname x%llx, "
2610 "port_id x%06x, portstate x%x port type x%x "
2611 "refcnt %d\n",
2612 remoteport, remoteport->port_name,
2613 remoteport->port_id, remoteport->port_state,
2614 ndlp->nlp_type, kref_read(&ndlp->kref));
2615
2616 /* Sanity check ndlp type. Only call for NVME ports. Don't
2617 * clear any rport state until the transport calls back.
2618 */
2619
2620 if (ndlp->nlp_type & NLP_NVME_TARGET) {
2621 /* No concern about the role change on the nvme remoteport.
2622 * The transport will update it.
2623 */
2624 spin_lock_irq(&vport->phba->hbalock);
2625 ndlp->fc4_xpt_flags |= NVME_XPT_UNREG_WAIT;
2626 spin_unlock_irq(&vport->phba->hbalock);
2627
2628 /* Don't let the host nvme transport keep sending keep-alives
2629 * on this remoteport. Vport is unloading, no recovery. The
2630 * return values is ignored. The upcall is a courtesy to the
2631 * transport.
2632 */
2633 if (vport->load_flag & FC_UNLOADING)
2634 (void)nvme_fc_set_remoteport_devloss(remoteport, 0);
2635
2636 ret = nvme_fc_unregister_remoteport(remoteport);
2637
2638 /* The driver no longer knows if the nrport memory is valid.
2639 * because the controller teardown process has begun and
2640 * is asynchronous. Break the binding in the ndlp. Also
2641 * remove the register ndlp reference to setup node release.
2642 */
2643 ndlp->nrport = NULL;
2644 lpfc_nlp_put(ndlp);
2645 if (ret != 0) {
2646 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2647 "6167 NVME unregister failed %d "
2648 "port_state x%x\n",
2649 ret, remoteport->port_state);
2650 }
2651 }
2652 return;
2653
2654 input_err:
2655 #endif
2656 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2657 "6168 State error: lport x%px, rport x%px FCID x%06x\n",
2658 vport->localport, ndlp->rport, ndlp->nlp_DID);
2659 }
2660
2661 /**
2662 * lpfc_sli4_nvme_pci_offline_aborted - Fast-path process of NVME xri abort
2663 * @phba: pointer to lpfc hba data structure.
2664 * @lpfc_ncmd: The nvme job structure for the request being aborted.
2665 *
2666 * This routine is invoked by the worker thread to process a SLI4 fast-path
2667 * NVME aborted xri. Aborted NVME IO commands are completed to the transport
2668 * here.
2669 **/
2670 void
lpfc_sli4_nvme_pci_offline_aborted(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_ncmd)2671 lpfc_sli4_nvme_pci_offline_aborted(struct lpfc_hba *phba,
2672 struct lpfc_io_buf *lpfc_ncmd)
2673 {
2674 struct nvmefc_fcp_req *nvme_cmd = NULL;
2675
2676 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2677 "6533 %s nvme_cmd %p tag x%x abort complete and "
2678 "xri released\n", __func__,
2679 lpfc_ncmd->nvmeCmd,
2680 lpfc_ncmd->cur_iocbq.iotag);
2681
2682 /* Aborted NVME commands are required to not complete
2683 * before the abort exchange command fully completes.
2684 * Once completed, it is available via the put list.
2685 */
2686 if (lpfc_ncmd->nvmeCmd) {
2687 nvme_cmd = lpfc_ncmd->nvmeCmd;
2688 nvme_cmd->transferred_length = 0;
2689 nvme_cmd->rcv_rsplen = 0;
2690 nvme_cmd->status = NVME_SC_INTERNAL;
2691 nvme_cmd->done(nvme_cmd);
2692 lpfc_ncmd->nvmeCmd = NULL;
2693 }
2694 lpfc_release_nvme_buf(phba, lpfc_ncmd);
2695 }
2696
2697 /**
2698 * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
2699 * @phba: pointer to lpfc hba data structure.
2700 * @axri: pointer to the fcp xri abort wcqe structure.
2701 * @lpfc_ncmd: The nvme job structure for the request being aborted.
2702 *
2703 * This routine is invoked by the worker thread to process a SLI4 fast-path
2704 * NVME aborted xri. Aborted NVME IO commands are completed to the transport
2705 * here.
2706 **/
2707 void
lpfc_sli4_nvme_xri_aborted(struct lpfc_hba * phba,struct sli4_wcqe_xri_aborted * axri,struct lpfc_io_buf * lpfc_ncmd)2708 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
2709 struct sli4_wcqe_xri_aborted *axri,
2710 struct lpfc_io_buf *lpfc_ncmd)
2711 {
2712 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
2713 struct nvmefc_fcp_req *nvme_cmd = NULL;
2714 struct lpfc_nodelist *ndlp = lpfc_ncmd->ndlp;
2715
2716
2717 if (ndlp)
2718 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
2719
2720 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2721 "6311 nvme_cmd %p xri x%x tag x%x abort complete and "
2722 "xri released\n",
2723 lpfc_ncmd->nvmeCmd, xri,
2724 lpfc_ncmd->cur_iocbq.iotag);
2725
2726 /* Aborted NVME commands are required to not complete
2727 * before the abort exchange command fully completes.
2728 * Once completed, it is available via the put list.
2729 */
2730 if (lpfc_ncmd->nvmeCmd) {
2731 nvme_cmd = lpfc_ncmd->nvmeCmd;
2732 nvme_cmd->done(nvme_cmd);
2733 lpfc_ncmd->nvmeCmd = NULL;
2734 }
2735 lpfc_release_nvme_buf(phba, lpfc_ncmd);
2736 }
2737
2738 /**
2739 * lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete
2740 * @phba: Pointer to HBA context object.
2741 *
2742 * This function flushes all wqes in the nvme rings and frees all resources
2743 * in the txcmplq. This function does not issue abort wqes for the IO
2744 * commands in txcmplq, they will just be returned with
2745 * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
2746 * slot has been permanently disabled.
2747 **/
2748 void
lpfc_nvme_wait_for_io_drain(struct lpfc_hba * phba)2749 lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
2750 {
2751 struct lpfc_sli_ring *pring;
2752 u32 i, wait_cnt = 0;
2753
2754 if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.hdwq)
2755 return;
2756
2757 /* Cycle through all IO rings and make sure all outstanding
2758 * WQEs have been removed from the txcmplqs.
2759 */
2760 for (i = 0; i < phba->cfg_hdw_queue; i++) {
2761 if (!phba->sli4_hba.hdwq[i].io_wq)
2762 continue;
2763 pring = phba->sli4_hba.hdwq[i].io_wq->pring;
2764
2765 if (!pring)
2766 continue;
2767
2768 /* Retrieve everything on the txcmplq */
2769 while (!list_empty(&pring->txcmplq)) {
2770 msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1);
2771 wait_cnt++;
2772
2773 /* The sleep is 10mS. Every ten seconds,
2774 * dump a message. Something is wrong.
2775 */
2776 if ((wait_cnt % 1000) == 0) {
2777 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2778 "6178 NVME IO not empty, "
2779 "cnt %d\n", wait_cnt);
2780 }
2781 }
2782 }
2783
2784 /* Make sure HBA is alive */
2785 lpfc_issue_hb_tmo(phba);
2786
2787 }
2788
2789 void
lpfc_nvme_cancel_iocb(struct lpfc_hba * phba,struct lpfc_iocbq * pwqeIn,uint32_t stat,uint32_t param)2790 lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
2791 uint32_t stat, uint32_t param)
2792 {
2793 #if (IS_ENABLED(CONFIG_NVME_FC))
2794 struct lpfc_io_buf *lpfc_ncmd;
2795 struct nvmefc_fcp_req *nCmd;
2796 struct lpfc_wcqe_complete wcqe;
2797 struct lpfc_wcqe_complete *wcqep = &wcqe;
2798
2799 lpfc_ncmd = pwqeIn->io_buf;
2800 if (!lpfc_ncmd) {
2801 lpfc_sli_release_iocbq(phba, pwqeIn);
2802 return;
2803 }
2804 /* For abort iocb just return, IO iocb will do a done call */
2805 if (bf_get(wqe_cmnd, &pwqeIn->wqe.gen_req.wqe_com) ==
2806 CMD_ABORT_XRI_CX) {
2807 lpfc_sli_release_iocbq(phba, pwqeIn);
2808 return;
2809 }
2810
2811 spin_lock(&lpfc_ncmd->buf_lock);
2812 nCmd = lpfc_ncmd->nvmeCmd;
2813 if (!nCmd) {
2814 spin_unlock(&lpfc_ncmd->buf_lock);
2815 lpfc_release_nvme_buf(phba, lpfc_ncmd);
2816 return;
2817 }
2818 spin_unlock(&lpfc_ncmd->buf_lock);
2819
2820 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2821 "6194 NVME Cancel xri %x\n",
2822 lpfc_ncmd->cur_iocbq.sli4_xritag);
2823
2824 wcqep->word0 = 0;
2825 bf_set(lpfc_wcqe_c_status, wcqep, stat);
2826 wcqep->parameter = param;
2827 wcqep->total_data_placed = 0;
2828 wcqep->word3 = 0; /* xb is 0 */
2829
2830 /* Call release with XB=1 to queue the IO into the abort list. */
2831 if (phba->sli.sli_flag & LPFC_SLI_ACTIVE)
2832 bf_set(lpfc_wcqe_c_xb, wcqep, 1);
2833
2834 memcpy(&pwqeIn->wcqe_cmpl, wcqep, sizeof(*wcqep));
2835 (pwqeIn->cmd_cmpl)(phba, pwqeIn, pwqeIn);
2836 #endif
2837 }
2838