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Linux 4.18.10
[linux/fpc-iii.git] / drivers / scsi / lpfc / lpfc_nvme.c
blobcab1fb087e6a70d54fb2ad7dd70910b8af3f6f2f
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2018 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 <linux/nvme.h>
40 #include <linux/nvme-fc-driver.h>
41 #include <linux/nvme-fc.h>
42 #include "lpfc_version.h"
43 #include "lpfc_hw4.h"
44 #include "lpfc_hw.h"
45 #include "lpfc_sli.h"
46 #include "lpfc_sli4.h"
47 #include "lpfc_nl.h"
48 #include "lpfc_disc.h"
49 #include "lpfc.h"
50 #include "lpfc_nvme.h"
51 #include "lpfc_scsi.h"
52 #include "lpfc_logmsg.h"
53 #include "lpfc_crtn.h"
54 #include "lpfc_vport.h"
55 #include "lpfc_debugfs.h"
56
57 /* NVME initiator-based functions */
58
59 static struct lpfc_nvme_buf *
60 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
61 int expedite);
62
63 static void
64 lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_nvme_buf *);
65
66 static struct nvme_fc_port_template lpfc_nvme_template;
67
68 static union lpfc_wqe128 lpfc_iread_cmd_template;
69 static union lpfc_wqe128 lpfc_iwrite_cmd_template;
70 static union lpfc_wqe128 lpfc_icmnd_cmd_template;
71
72 /* Setup WQE templates for NVME IOs */
73 void
74 lpfc_nvme_cmd_template(void)
75 {
76 union lpfc_wqe128 *wqe;
77
78 /* IREAD template */
79 wqe = &lpfc_iread_cmd_template;
80 memset(wqe, 0, sizeof(union lpfc_wqe128));
81
82 /* Word 0, 1, 2 - BDE is variable */
83
84 /* Word 3 - cmd_buff_len, payload_offset_len is zero */
85
86 /* Word 4 - total_xfer_len is variable */
87
88 /* Word 5 - is zero */
89
90 /* Word 6 - ctxt_tag, xri_tag is variable */
91
92 /* Word 7 */
93 bf_set(wqe_cmnd, &wqe->fcp_iread.wqe_com, CMD_FCP_IREAD64_WQE);
94 bf_set(wqe_pu, &wqe->fcp_iread.wqe_com, PARM_READ_CHECK);
95 bf_set(wqe_class, &wqe->fcp_iread.wqe_com, CLASS3);
96 bf_set(wqe_ct, &wqe->fcp_iread.wqe_com, SLI4_CT_RPI);
97
98 /* Word 8 - abort_tag is variable */
99
100 /* Word 9 - reqtag is variable */
101
102 /* Word 10 - dbde, wqes is variable */
103 bf_set(wqe_qosd, &wqe->fcp_iread.wqe_com, 0);
104 bf_set(wqe_nvme, &wqe->fcp_iread.wqe_com, 1);
105 bf_set(wqe_iod, &wqe->fcp_iread.wqe_com, LPFC_WQE_IOD_READ);
106 bf_set(wqe_lenloc, &wqe->fcp_iread.wqe_com, LPFC_WQE_LENLOC_WORD4);
107 bf_set(wqe_dbde, &wqe->fcp_iread.wqe_com, 0);
108 bf_set(wqe_wqes, &wqe->fcp_iread.wqe_com, 1);
109
110 /* Word 11 - pbde is variable */
111 bf_set(wqe_cmd_type, &wqe->fcp_iread.wqe_com, NVME_READ_CMD);
112 bf_set(wqe_cqid, &wqe->fcp_iread.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
113 bf_set(wqe_pbde, &wqe->fcp_iread.wqe_com, 1);
114
115 /* Word 12 - is zero */
116
117 /* Word 13, 14, 15 - PBDE is variable */
118
119 /* IWRITE template */
120 wqe = &lpfc_iwrite_cmd_template;
121 memset(wqe, 0, sizeof(union lpfc_wqe128));
122
123 /* Word 0, 1, 2 - BDE is variable */
124
125 /* Word 3 - cmd_buff_len, payload_offset_len is zero */
126
127 /* Word 4 - total_xfer_len is variable */
128
129 /* Word 5 - initial_xfer_len is variable */
130
131 /* Word 6 - ctxt_tag, xri_tag is variable */
132
133 /* Word 7 */
134 bf_set(wqe_cmnd, &wqe->fcp_iwrite.wqe_com, CMD_FCP_IWRITE64_WQE);
135 bf_set(wqe_pu, &wqe->fcp_iwrite.wqe_com, PARM_READ_CHECK);
136 bf_set(wqe_class, &wqe->fcp_iwrite.wqe_com, CLASS3);
137 bf_set(wqe_ct, &wqe->fcp_iwrite.wqe_com, SLI4_CT_RPI);
138
139 /* Word 8 - abort_tag is variable */
140
141 /* Word 9 - reqtag is variable */
142
143 /* Word 10 - dbde, wqes is variable */
144 bf_set(wqe_qosd, &wqe->fcp_iwrite.wqe_com, 0);
145 bf_set(wqe_nvme, &wqe->fcp_iwrite.wqe_com, 1);
146 bf_set(wqe_iod, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_IOD_WRITE);
147 bf_set(wqe_lenloc, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_LENLOC_WORD4);
148 bf_set(wqe_dbde, &wqe->fcp_iwrite.wqe_com, 0);
149 bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
150
151 /* Word 11 - pbde is variable */
152 bf_set(wqe_cmd_type, &wqe->fcp_iwrite.wqe_com, NVME_WRITE_CMD);
153 bf_set(wqe_cqid, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
154 bf_set(wqe_pbde, &wqe->fcp_iwrite.wqe_com, 1);
155
156 /* Word 12 - is zero */
157
158 /* Word 13, 14, 15 - PBDE is variable */
159
160 /* ICMND template */
161 wqe = &lpfc_icmnd_cmd_template;
162 memset(wqe, 0, sizeof(union lpfc_wqe128));
163
164 /* Word 0, 1, 2 - BDE is variable */
165
166 /* Word 3 - payload_offset_len is variable */
167
168 /* Word 4, 5 - is zero */
169
170 /* Word 6 - ctxt_tag, xri_tag is variable */
171
172 /* Word 7 */
173 bf_set(wqe_cmnd, &wqe->fcp_icmd.wqe_com, CMD_FCP_ICMND64_WQE);
174 bf_set(wqe_pu, &wqe->fcp_icmd.wqe_com, 0);
175 bf_set(wqe_class, &wqe->fcp_icmd.wqe_com, CLASS3);
176 bf_set(wqe_ct, &wqe->fcp_icmd.wqe_com, SLI4_CT_RPI);
177
178 /* Word 8 - abort_tag is variable */
179
180 /* Word 9 - reqtag is variable */
181
182 /* Word 10 - dbde, wqes is variable */
183 bf_set(wqe_qosd, &wqe->fcp_icmd.wqe_com, 1);
184 bf_set(wqe_nvme, &wqe->fcp_icmd.wqe_com, 1);
185 bf_set(wqe_iod, &wqe->fcp_icmd.wqe_com, LPFC_WQE_IOD_NONE);
186 bf_set(wqe_lenloc, &wqe->fcp_icmd.wqe_com, LPFC_WQE_LENLOC_NONE);
187 bf_set(wqe_dbde, &wqe->fcp_icmd.wqe_com, 0);
188 bf_set(wqe_wqes, &wqe->fcp_icmd.wqe_com, 1);
189
190 /* Word 11 */
191 bf_set(wqe_cmd_type, &wqe->fcp_icmd.wqe_com, FCP_COMMAND);
192 bf_set(wqe_cqid, &wqe->fcp_icmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
193 bf_set(wqe_pbde, &wqe->fcp_icmd.wqe_com, 0);
194
195 /* Word 12, 13, 14, 15 - is zero */
196 }
197
198 /**
199 * lpfc_nvme_create_queue -
200 * @lpfc_pnvme: Pointer to the driver's nvme instance data
201 * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
202 * @handle: An opaque driver handle used in follow-up calls.
203 *
204 * Driver registers this routine to preallocate and initialize any
205 * internal data structures to bind the @qidx to its internal IO queues.
206 * A hardware queue maps (qidx) to a specific driver MSI-X vector/EQ/CQ/WQ.
207 *
208 * Return value :
209 * 0 - Success
210 * -EINVAL - Unsupported input value.
211 * -ENOMEM - Could not alloc necessary memory
212 **/
213 static int
214 lpfc_nvme_create_queue(struct nvme_fc_local_port *pnvme_lport,
215 unsigned int qidx, u16 qsize,
216 void **handle)
217 {
218 struct lpfc_nvme_lport *lport;
219 struct lpfc_vport *vport;
220 struct lpfc_nvme_qhandle *qhandle;
221 char *str;
222
223 if (!pnvme_lport->private)
224 return -ENOMEM;
225
226 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
227 vport = lport->vport;
228 qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
229 if (qhandle == NULL)
230 return -ENOMEM;
231
232 qhandle->cpu_id = smp_processor_id();
233 qhandle->qidx = qidx;
234 /*
235 * NVME qidx == 0 is the admin queue, so both admin queue
236 * and first IO queue will use MSI-X vector and associated
237 * EQ/CQ/WQ at index 0. After that they are sequentially assigned.
238 */
239 if (qidx) {
240 str = "IO "; /* IO queue */
241 qhandle->index = ((qidx - 1) %
242 vport->phba->cfg_nvme_io_channel);
243 } else {
244 str = "ADM"; /* Admin queue */
245 qhandle->index = qidx;
246 }
247
248 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
249 "6073 Binding %s HdwQueue %d (cpu %d) to "
250 "io_channel %d qhandle %p\n", str,
251 qidx, qhandle->cpu_id, qhandle->index, qhandle);
252 *handle = (void *)qhandle;
253 return 0;
254 }
255
256 /**
257 * lpfc_nvme_delete_queue -
258 * @lpfc_pnvme: Pointer to the driver's nvme instance data
259 * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
260 * @handle: An opaque driver handle from lpfc_nvme_create_queue
261 *
262 * Driver registers this routine to free
263 * any internal data structures to bind the @qidx to its internal
264 * IO queues.
265 *
266 * Return value :
267 * 0 - Success
268 * TODO: What are the failure codes.
269 **/
270 static void
271 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
272 unsigned int qidx,
273 void *handle)
274 {
275 struct lpfc_nvme_lport *lport;
276 struct lpfc_vport *vport;
277
278 if (!pnvme_lport->private)
279 return;
280
281 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
282 vport = lport->vport;
283
284 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
285 "6001 ENTER. lpfc_pnvme %p, qidx x%xi qhandle %p\n",
286 lport, qidx, handle);
287 kfree(handle);
288 }
289
290 static void
291 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
292 {
293 struct lpfc_nvme_lport *lport = localport->private;
294
295 lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME,
296 "6173 localport %p delete complete\n",
297 lport);
298
299 /* release any threads waiting for the unreg to complete */
300 complete(&lport->lport_unreg_done);
301 }
302
303 /* lpfc_nvme_remoteport_delete
304 *
305 * @remoteport: Pointer to an nvme transport remoteport instance.
306 *
307 * This is a template downcall. NVME transport calls this function
308 * when it has completed the unregistration of a previously
309 * registered remoteport.
310 *
311 * Return value :
312 * None
313 */
314 void
315 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
316 {
317 struct lpfc_nvme_rport *rport = remoteport->private;
318 struct lpfc_vport *vport;
319 struct lpfc_nodelist *ndlp;
320
321 ndlp = rport->ndlp;
322 if (!ndlp)
323 goto rport_err;
324
325 vport = ndlp->vport;
326 if (!vport)
327 goto rport_err;
328
329 /* Remove this rport from the lport's list - memory is owned by the
330 * transport. Remove the ndlp reference for the NVME transport before
331 * calling state machine to remove the node.
332 */
333 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
334 "6146 remoteport delete of remoteport %p\n",
335 remoteport);
336 spin_lock_irq(&vport->phba->hbalock);
337
338 /* The register rebind might have occurred before the delete
339 * downcall. Guard against this race.
340 */
341 if (ndlp->upcall_flags & NLP_WAIT_FOR_UNREG) {
342 ndlp->nrport = NULL;
343 ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
344 }
345 spin_unlock_irq(&vport->phba->hbalock);
346
347 /* Remove original register reference. The host transport
348 * won't reference this rport/remoteport any further.
349 */
350 lpfc_nlp_put(ndlp);
351
352 rport_err:
353 return;
354 }
355
356 static void
357 lpfc_nvme_cmpl_gen_req(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
358 struct lpfc_wcqe_complete *wcqe)
359 {
360 struct lpfc_vport *vport = cmdwqe->vport;
361 struct lpfc_nvme_lport *lport;
362 uint32_t status;
363 struct nvmefc_ls_req *pnvme_lsreq;
364 struct lpfc_dmabuf *buf_ptr;
365 struct lpfc_nodelist *ndlp;
366
367 pnvme_lsreq = (struct nvmefc_ls_req *)cmdwqe->context2;
368 status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
369
370 if (vport->localport) {
371 lport = (struct lpfc_nvme_lport *)vport->localport->private;
372 if (lport) {
373 atomic_inc(&lport->fc4NvmeLsCmpls);
374 if (status) {
375 if (bf_get(lpfc_wcqe_c_xb, wcqe))
376 atomic_inc(&lport->cmpl_ls_xb);
377 atomic_inc(&lport->cmpl_ls_err);
378 }
379 }
380 }
381
382 ndlp = (struct lpfc_nodelist *)cmdwqe->context1;
383 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
384 "6047 nvme cmpl Enter "
385 "Data %p DID %x Xri: %x status %x reason x%x cmd:%p "
386 "lsreg:%p bmp:%p ndlp:%p\n",
387 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
388 cmdwqe->sli4_xritag, status,
389 (wcqe->parameter & 0xffff),
390 cmdwqe, pnvme_lsreq, cmdwqe->context3, ndlp);
391
392 lpfc_nvmeio_data(phba, "NVME LS CMPL: xri x%x stat x%x parm x%x\n",
393 cmdwqe->sli4_xritag, status, wcqe->parameter);
394
395 if (cmdwqe->context3) {
396 buf_ptr = (struct lpfc_dmabuf *)cmdwqe->context3;
397 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
398 kfree(buf_ptr);
399 cmdwqe->context3 = NULL;
400 }
401 if (pnvme_lsreq->done)
402 pnvme_lsreq->done(pnvme_lsreq, status);
403 else
404 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
405 "6046 nvme cmpl without done call back? "
406 "Data %p DID %x Xri: %x status %x\n",
407 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
408 cmdwqe->sli4_xritag, status);
409 if (ndlp) {
410 lpfc_nlp_put(ndlp);
411 cmdwqe->context1 = NULL;
412 }
413 lpfc_sli_release_iocbq(phba, cmdwqe);
414 }
415
416 static int
417 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
418 struct lpfc_dmabuf *inp,
419 struct nvmefc_ls_req *pnvme_lsreq,
420 void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
421 struct lpfc_wcqe_complete *),
422 struct lpfc_nodelist *ndlp, uint32_t num_entry,
423 uint32_t tmo, uint8_t retry)
424 {
425 struct lpfc_hba *phba = vport->phba;
426 union lpfc_wqe128 *wqe;
427 struct lpfc_iocbq *genwqe;
428 struct ulp_bde64 *bpl;
429 struct ulp_bde64 bde;
430 int i, rc, xmit_len, first_len;
431
432 /* Allocate buffer for command WQE */
433 genwqe = lpfc_sli_get_iocbq(phba);
434 if (genwqe == NULL)
435 return 1;
436
437 wqe = &genwqe->wqe;
438 memset(wqe, 0, sizeof(union lpfc_wqe));
439
440 genwqe->context3 = (uint8_t *)bmp;
441 genwqe->iocb_flag |= LPFC_IO_NVME_LS;
442
443 /* Save for completion so we can release these resources */
444 genwqe->context1 = lpfc_nlp_get(ndlp);
445 genwqe->context2 = (uint8_t *)pnvme_lsreq;
446 /* Fill in payload, bp points to frame payload */
447
448 if (!tmo)
449 /* FC spec states we need 3 * ratov for CT requests */
450 tmo = (3 * phba->fc_ratov);
451
452 /* For this command calculate the xmit length of the request bde. */
453 xmit_len = 0;
454 first_len = 0;
455 bpl = (struct ulp_bde64 *)bmp->virt;
456 for (i = 0; i < num_entry; i++) {
457 bde.tus.w = bpl[i].tus.w;
458 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
459 break;
460 xmit_len += bde.tus.f.bdeSize;
461 if (i == 0)
462 first_len = xmit_len;
463 }
464
465 genwqe->rsvd2 = num_entry;
466 genwqe->hba_wqidx = 0;
467
468 /* Words 0 - 2 */
469 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
470 wqe->generic.bde.tus.f.bdeSize = first_len;
471 wqe->generic.bde.addrLow = bpl[0].addrLow;
472 wqe->generic.bde.addrHigh = bpl[0].addrHigh;
473
474 /* Word 3 */
475 wqe->gen_req.request_payload_len = first_len;
476
477 /* Word 4 */
478
479 /* Word 5 */
480 bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
481 bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
482 bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
483 bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
484 bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
485
486 /* Word 6 */
487 bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
488 phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
489 bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
490
491 /* Word 7 */
492 bf_set(wqe_tmo, &wqe->gen_req.wqe_com, (vport->phba->fc_ratov-1));
493 bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
494 bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
495 bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
496
497 /* Word 8 */
498 wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
499
500 /* Word 9 */
501 bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
502
503 /* Word 10 */
504 bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
505 bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
506 bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
507 bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
508 bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
509
510 /* Word 11 */
511 bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
512 bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
513
514
515 /* Issue GEN REQ WQE for NPORT <did> */
516 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
517 "6050 Issue GEN REQ WQE to NPORT x%x "
518 "Data: x%x x%x wq:%p lsreq:%p bmp:%p xmit:%d 1st:%d\n",
519 ndlp->nlp_DID, genwqe->iotag,
520 vport->port_state,
521 genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
522 genwqe->wqe_cmpl = cmpl;
523 genwqe->iocb_cmpl = NULL;
524 genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
525 genwqe->vport = vport;
526 genwqe->retry = retry;
527
528 lpfc_nvmeio_data(phba, "NVME LS XMIT: xri x%x iotag x%x to x%06x\n",
529 genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
530
531 rc = lpfc_sli4_issue_wqe(phba, LPFC_ELS_RING, genwqe);
532 if (rc) {
533 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
534 "6045 Issue GEN REQ WQE to NPORT x%x "
535 "Data: x%x x%x\n",
536 ndlp->nlp_DID, genwqe->iotag,
537 vport->port_state);
538 lpfc_sli_release_iocbq(phba, genwqe);
539 return 1;
540 }
541 return 0;
542 }
543
544 /**
545 * lpfc_nvme_ls_req - Issue an Link Service request
546 * @lpfc_pnvme: Pointer to the driver's nvme instance data
547 * @lpfc_nvme_lport: Pointer to the driver's local port data
548 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
549 *
550 * Driver registers this routine to handle any link service request
551 * from the nvme_fc transport to a remote nvme-aware port.
552 *
553 * Return value :
554 * 0 - Success
555 * TODO: What are the failure codes.
556 **/
557 static int
558 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
559 struct nvme_fc_remote_port *pnvme_rport,
560 struct nvmefc_ls_req *pnvme_lsreq)
561 {
562 int ret = 0;
563 struct lpfc_nvme_lport *lport;
564 struct lpfc_nvme_rport *rport;
565 struct lpfc_vport *vport;
566 struct lpfc_nodelist *ndlp;
567 struct ulp_bde64 *bpl;
568 struct lpfc_dmabuf *bmp;
569 uint16_t ntype, nstate;
570
571 /* there are two dma buf in the request, actually there is one and
572 * the second one is just the start address + cmd size.
573 * Before calling lpfc_nvme_gen_req these buffers need to be wrapped
574 * in a lpfc_dmabuf struct. When freeing we just free the wrapper
575 * because the nvem layer owns the data bufs.
576 * We do not have to break these packets open, we don't care what is in
577 * them. And we do not have to look at the resonse data, we only care
578 * that we got a response. All of the caring is going to happen in the
579 * nvme-fc layer.
580 */
581
582 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
583 rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
584 if (unlikely(!lport) || unlikely(!rport))
585 return -EINVAL;
586
587 vport = lport->vport;
588
589 if (vport->load_flag & FC_UNLOADING)
590 return -ENODEV;
591
592 /* Need the ndlp. It is stored in the driver's rport. */
593 ndlp = rport->ndlp;
594 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
595 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
596 "6051 Remoteport %p, rport has invalid ndlp. "
597 "Failing LS Req\n", pnvme_rport);
598 return -ENODEV;
599 }
600
601 /* The remote node has to be a mapped nvme target or an
602 * unmapped nvme initiator or it's an error.
603 */
604 ntype = ndlp->nlp_type;
605 nstate = ndlp->nlp_state;
606 if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
607 (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
608 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
609 "6088 DID x%06x not ready for "
610 "IO. State x%x, Type x%x\n",
611 pnvme_rport->port_id,
612 ndlp->nlp_state, ndlp->nlp_type);
613 return -ENODEV;
614 }
615 bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
616 if (!bmp) {
617
618 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
619 "6044 Could not find node for DID %x\n",
620 pnvme_rport->port_id);
621 return 2;
622 }
623 INIT_LIST_HEAD(&bmp->list);
624 bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
625 if (!bmp->virt) {
626 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
627 "6042 Could not find node for DID %x\n",
628 pnvme_rport->port_id);
629 kfree(bmp);
630 return 3;
631 }
632 bpl = (struct ulp_bde64 *)bmp->virt;
633 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
634 bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
635 bpl->tus.f.bdeFlags = 0;
636 bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
637 bpl->tus.w = le32_to_cpu(bpl->tus.w);
638 bpl++;
639
640 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
641 bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
642 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
643 bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
644 bpl->tus.w = le32_to_cpu(bpl->tus.w);
645
646 /* Expand print to include key fields. */
647 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
648 "6149 Issue LS Req to DID 0x%06x lport %p, rport %p "
649 "lsreq%p rqstlen:%d rsplen:%d %pad %pad\n",
650 ndlp->nlp_DID,
651 pnvme_lport, pnvme_rport,
652 pnvme_lsreq, pnvme_lsreq->rqstlen,
653 pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
654 &pnvme_lsreq->rspdma);
655
656 atomic_inc(&lport->fc4NvmeLsRequests);
657
658 /* Hardcode the wait to 30 seconds. Connections are failing otherwise.
659 * This code allows it all to work.
660 */
661 ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
662 pnvme_lsreq, lpfc_nvme_cmpl_gen_req,
663 ndlp, 2, 30, 0);
664 if (ret != WQE_SUCCESS) {
665 atomic_inc(&lport->xmt_ls_err);
666 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
667 "6052 EXIT. issue ls wqe failed lport %p, "
668 "rport %p lsreq%p Status %x DID %x\n",
669 pnvme_lport, pnvme_rport, pnvme_lsreq,
670 ret, ndlp->nlp_DID);
671 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
672 kfree(bmp);
673 return ret;
674 }
675
676 /* Stub in routine and return 0 for now. */
677 return ret;
678 }
679
680 /**
681 * lpfc_nvme_ls_abort - Issue an Link Service request
682 * @lpfc_pnvme: Pointer to the driver's nvme instance data
683 * @lpfc_nvme_lport: Pointer to the driver's local port data
684 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
685 *
686 * Driver registers this routine to handle any link service request
687 * from the nvme_fc transport to a remote nvme-aware port.
688 *
689 * Return value :
690 * 0 - Success
691 * TODO: What are the failure codes.
692 **/
693 static void
694 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
695 struct nvme_fc_remote_port *pnvme_rport,
696 struct nvmefc_ls_req *pnvme_lsreq)
697 {
698 struct lpfc_nvme_lport *lport;
699 struct lpfc_vport *vport;
700 struct lpfc_hba *phba;
701 struct lpfc_nodelist *ndlp;
702 LIST_HEAD(abort_list);
703 struct lpfc_sli_ring *pring;
704 struct lpfc_iocbq *wqe, *next_wqe;
705
706 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
707 if (unlikely(!lport))
708 return;
709 vport = lport->vport;
710 phba = vport->phba;
711
712 if (vport->load_flag & FC_UNLOADING)
713 return;
714
715 ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
716 if (!ndlp) {
717 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
718 "6049 Could not find node for DID %x\n",
719 pnvme_rport->port_id);
720 return;
721 }
722
723 /* Expand print to include key fields. */
724 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
725 "6040 ENTER. lport %p, rport %p lsreq %p rqstlen:%d "
726 "rsplen:%d %pad %pad\n",
727 pnvme_lport, pnvme_rport,
728 pnvme_lsreq, pnvme_lsreq->rqstlen,
729 pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
730 &pnvme_lsreq->rspdma);
731
732 /*
733 * Lock the ELS ring txcmplq and build a local list of all ELS IOs
734 * that need an ABTS. The IOs need to stay on the txcmplq so that
735 * the abort operation completes them successfully.
736 */
737 pring = phba->sli4_hba.nvmels_wq->pring;
738 spin_lock_irq(&phba->hbalock);
739 spin_lock(&pring->ring_lock);
740 list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
741 /* Add to abort_list on on NDLP match. */
742 if (lpfc_check_sli_ndlp(phba, pring, wqe, ndlp)) {
743 wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
744 list_add_tail(&wqe->dlist, &abort_list);
745 }
746 }
747 spin_unlock(&pring->ring_lock);
748 spin_unlock_irq(&phba->hbalock);
749
750 /* Abort the targeted IOs and remove them from the abort list. */
751 list_for_each_entry_safe(wqe, next_wqe, &abort_list, dlist) {
752 atomic_inc(&lport->xmt_ls_abort);
753 spin_lock_irq(&phba->hbalock);
754 list_del_init(&wqe->dlist);
755 lpfc_sli_issue_abort_iotag(phba, pring, wqe);
756 spin_unlock_irq(&phba->hbalock);
757 }
758 }
759
760 /* Fix up the existing sgls for NVME IO. */
761 static inline void
762 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
763 struct lpfc_nvme_buf *lpfc_ncmd,
764 struct nvmefc_fcp_req *nCmd)
765 {
766 struct lpfc_hba *phba = vport->phba;
767 struct sli4_sge *sgl;
768 union lpfc_wqe128 *wqe;
769 uint32_t *wptr, *dptr;
770
771 /*
772 * Get a local pointer to the built-in wqe and correct
773 * the cmd size to match NVME's 96 bytes and fix
774 * the dma address.
775 */
776
777 wqe = &lpfc_ncmd->cur_iocbq.wqe;
778
779 /*
780 * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
781 * match NVME. NVME sends 96 bytes. Also, use the
782 * nvme commands command and response dma addresses
783 * rather than the virtual memory to ease the restore
784 * operation.
785 */
786 sgl = lpfc_ncmd->nvme_sgl;
787 sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
788 if (phba->cfg_nvme_embed_cmd) {
789 sgl->addr_hi = 0;
790 sgl->addr_lo = 0;
791
792 /* Word 0-2 - NVME CMND IU (embedded payload) */
793 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
794 wqe->generic.bde.tus.f.bdeSize = 56;
795 wqe->generic.bde.addrHigh = 0;
796 wqe->generic.bde.addrLow = 64; /* Word 16 */
797
798 /* Word 10 - dbde is 0, wqes is 1 in template */
799
800 /*
801 * Embed the payload in the last half of the WQE
802 * WQE words 16-30 get the NVME CMD IU payload
803 *
804 * WQE words 16-19 get payload Words 1-4
805 * WQE words 20-21 get payload Words 6-7
806 * WQE words 22-29 get payload Words 16-23
807 */
808 wptr = &wqe->words[16]; /* WQE ptr */
809 dptr = (uint32_t *)nCmd->cmdaddr; /* payload ptr */
810 dptr++; /* Skip Word 0 in payload */
811
812 *wptr++ = *dptr++; /* Word 1 */
813 *wptr++ = *dptr++; /* Word 2 */
814 *wptr++ = *dptr++; /* Word 3 */
815 *wptr++ = *dptr++; /* Word 4 */
816 dptr++; /* Skip Word 5 in payload */
817 *wptr++ = *dptr++; /* Word 6 */
818 *wptr++ = *dptr++; /* Word 7 */
819 dptr += 8; /* Skip Words 8-15 in payload */
820 *wptr++ = *dptr++; /* Word 16 */
821 *wptr++ = *dptr++; /* Word 17 */
822 *wptr++ = *dptr++; /* Word 18 */
823 *wptr++ = *dptr++; /* Word 19 */
824 *wptr++ = *dptr++; /* Word 20 */
825 *wptr++ = *dptr++; /* Word 21 */
826 *wptr++ = *dptr++; /* Word 22 */
827 *wptr = *dptr; /* Word 23 */
828 } else {
829 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma));
830 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma));
831
832 /* Word 0-2 - NVME CMND IU Inline BDE */
833 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
834 wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen;
835 wqe->generic.bde.addrHigh = sgl->addr_hi;
836 wqe->generic.bde.addrLow = sgl->addr_lo;
837
838 /* Word 10 */
839 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
840 bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
841 }
842
843 sgl++;
844
845 /* Setup the physical region for the FCP RSP */
846 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
847 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
848 sgl->word2 = le32_to_cpu(sgl->word2);
849 if (nCmd->sg_cnt)
850 bf_set(lpfc_sli4_sge_last, sgl, 0);
851 else
852 bf_set(lpfc_sli4_sge_last, sgl, 1);
853 sgl->word2 = cpu_to_le32(sgl->word2);
854 sgl->sge_len = cpu_to_le32(nCmd->rsplen);
855 }
856
857 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
858 static void
859 lpfc_nvme_ktime(struct lpfc_hba *phba,
860 struct lpfc_nvme_buf *lpfc_ncmd)
861 {
862 uint64_t seg1, seg2, seg3, seg4;
863 uint64_t segsum;
864
865 if (!lpfc_ncmd->ts_last_cmd ||
866 !lpfc_ncmd->ts_cmd_start ||
867 !lpfc_ncmd->ts_cmd_wqput ||
868 !lpfc_ncmd->ts_isr_cmpl ||
869 !lpfc_ncmd->ts_data_nvme)
870 return;
871
872 if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_cmd_start)
873 return;
874 if (lpfc_ncmd->ts_cmd_start < lpfc_ncmd->ts_last_cmd)
875 return;
876 if (lpfc_ncmd->ts_cmd_wqput < lpfc_ncmd->ts_cmd_start)
877 return;
878 if (lpfc_ncmd->ts_isr_cmpl < lpfc_ncmd->ts_cmd_wqput)
879 return;
880 if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_isr_cmpl)
881 return;
882 /*
883 * Segment 1 - Time from Last FCP command cmpl is handed
884 * off to NVME Layer to start of next command.
885 * Segment 2 - Time from Driver receives a IO cmd start
886 * from NVME Layer to WQ put is done on IO cmd.
887 * Segment 3 - Time from Driver WQ put is done on IO cmd
888 * to MSI-X ISR for IO cmpl.
889 * Segment 4 - Time from MSI-X ISR for IO cmpl to when
890 * cmpl is handled off to the NVME Layer.
891 */
892 seg1 = lpfc_ncmd->ts_cmd_start - lpfc_ncmd->ts_last_cmd;
893 if (seg1 > 5000000) /* 5 ms - for sequential IOs only */
894 seg1 = 0;
895
896 /* Calculate times relative to start of IO */
897 seg2 = (lpfc_ncmd->ts_cmd_wqput - lpfc_ncmd->ts_cmd_start);
898 segsum = seg2;
899 seg3 = lpfc_ncmd->ts_isr_cmpl - lpfc_ncmd->ts_cmd_start;
900 if (segsum > seg3)
901 return;
902 seg3 -= segsum;
903 segsum += seg3;
904
905 seg4 = lpfc_ncmd->ts_data_nvme - lpfc_ncmd->ts_cmd_start;
906 if (segsum > seg4)
907 return;
908 seg4 -= segsum;
909
910 phba->ktime_data_samples++;
911 phba->ktime_seg1_total += seg1;
912 if (seg1 < phba->ktime_seg1_min)
913 phba->ktime_seg1_min = seg1;
914 else if (seg1 > phba->ktime_seg1_max)
915 phba->ktime_seg1_max = seg1;
916 phba->ktime_seg2_total += seg2;
917 if (seg2 < phba->ktime_seg2_min)
918 phba->ktime_seg2_min = seg2;
919 else if (seg2 > phba->ktime_seg2_max)
920 phba->ktime_seg2_max = seg2;
921 phba->ktime_seg3_total += seg3;
922 if (seg3 < phba->ktime_seg3_min)
923 phba->ktime_seg3_min = seg3;
924 else if (seg3 > phba->ktime_seg3_max)
925 phba->ktime_seg3_max = seg3;
926 phba->ktime_seg4_total += seg4;
927 if (seg4 < phba->ktime_seg4_min)
928 phba->ktime_seg4_min = seg4;
929 else if (seg4 > phba->ktime_seg4_max)
930 phba->ktime_seg4_max = seg4;
931
932 lpfc_ncmd->ts_last_cmd = 0;
933 lpfc_ncmd->ts_cmd_start = 0;
934 lpfc_ncmd->ts_cmd_wqput = 0;
935 lpfc_ncmd->ts_isr_cmpl = 0;
936 lpfc_ncmd->ts_data_nvme = 0;
937 }
938 #endif
939
940 /**
941 * lpfc_nvme_io_cmd_wqe_cmpl - Complete an NVME-over-FCP IO
942 * @lpfc_pnvme: Pointer to the driver's nvme instance data
943 * @lpfc_nvme_lport: Pointer to the driver's local port data
944 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
945 *
946 * Driver registers this routine as it io request handler. This
947 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
948 * data structure to the rport indicated in @lpfc_nvme_rport.
949 *
950 * Return value :
951 * 0 - Success
952 * TODO: What are the failure codes.
953 **/
954 static void
955 lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
956 struct lpfc_wcqe_complete *wcqe)
957 {
958 struct lpfc_nvme_buf *lpfc_ncmd =
959 (struct lpfc_nvme_buf *)pwqeIn->context1;
960 struct lpfc_vport *vport = pwqeIn->vport;
961 struct nvmefc_fcp_req *nCmd;
962 struct nvme_fc_ersp_iu *ep;
963 struct nvme_fc_cmd_iu *cp;
964 struct lpfc_nvme_rport *rport;
965 struct lpfc_nodelist *ndlp;
966 struct lpfc_nvme_fcpreq_priv *freqpriv;
967 struct lpfc_nvme_lport *lport;
968 struct lpfc_nvme_ctrl_stat *cstat;
969 unsigned long flags;
970 uint32_t code, status, idx;
971 uint16_t cid, sqhd, data;
972 uint32_t *ptr;
973
974 /* Sanity check on return of outstanding command */
975 if (!lpfc_ncmd || !lpfc_ncmd->nvmeCmd || !lpfc_ncmd->nrport) {
976 if (!lpfc_ncmd) {
977 lpfc_printf_vlog(vport, KERN_ERR,
978 LOG_NODE | LOG_NVME_IOERR,
979 "6071 Null lpfc_ncmd pointer. No "
980 "release, skip completion\n");
981 return;
982 }
983
984 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
985 "6066 Missing cmpl ptrs: lpfc_ncmd %p, "
986 "nvmeCmd %p nrport %p\n",
987 lpfc_ncmd, lpfc_ncmd->nvmeCmd,
988 lpfc_ncmd->nrport);
989
990 /* Release the lpfc_ncmd regardless of the missing elements. */
991 lpfc_release_nvme_buf(phba, lpfc_ncmd);
992 return;
993 }
994 nCmd = lpfc_ncmd->nvmeCmd;
995 rport = lpfc_ncmd->nrport;
996 status = bf_get(lpfc_wcqe_c_status, wcqe);
997
998 if (vport->localport) {
999 lport = (struct lpfc_nvme_lport *)vport->localport->private;
1000 if (lport) {
1001 idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
1002 cstat = &lport->cstat[idx];
1003 atomic_inc(&cstat->fc4NvmeIoCmpls);
1004 if (status) {
1005 if (bf_get(lpfc_wcqe_c_xb, wcqe))
1006 atomic_inc(&lport->cmpl_fcp_xb);
1007 atomic_inc(&lport->cmpl_fcp_err);
1008 }
1009 }
1010 }
1011
1012 lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
1013 lpfc_ncmd->cur_iocbq.sli4_xritag,
1014 status, wcqe->parameter);
1015 /*
1016 * Catch race where our node has transitioned, but the
1017 * transport is still transitioning.
1018 */
1019 ndlp = rport->ndlp;
1020 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1021 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
1022 "6061 rport %p, DID x%06x node not ready.\n",
1023 rport, rport->remoteport->port_id);
1024
1025 ndlp = lpfc_findnode_did(vport, rport->remoteport->port_id);
1026 if (!ndlp) {
1027 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1028 "6062 Ignoring NVME cmpl. No ndlp\n");
1029 goto out_err;
1030 }
1031 }
1032
1033 code = bf_get(lpfc_wcqe_c_code, wcqe);
1034 if (code == CQE_CODE_NVME_ERSP) {
1035 /* For this type of CQE, we need to rebuild the rsp */
1036 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
1037
1038 /*
1039 * Get Command Id from cmd to plug into response. This
1040 * code is not needed in the next NVME Transport drop.
1041 */
1042 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
1043 cid = cp->sqe.common.command_id;
1044
1045 /*
1046 * RSN is in CQE word 2
1047 * SQHD is in CQE Word 3 bits 15:0
1048 * Cmd Specific info is in CQE Word 1
1049 * and in CQE Word 0 bits 15:0
1050 */
1051 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
1052
1053 /* Now lets build the NVME ERSP IU */
1054 ep->iu_len = cpu_to_be16(8);
1055 ep->rsn = wcqe->parameter;
1056 ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
1057 ep->rsvd12 = 0;
1058 ptr = (uint32_t *)&ep->cqe.result.u64;
1059 *ptr++ = wcqe->total_data_placed;
1060 data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
1061 *ptr = (uint32_t)data;
1062 ep->cqe.sq_head = sqhd;
1063 ep->cqe.sq_id = nCmd->sqid;
1064 ep->cqe.command_id = cid;
1065 ep->cqe.status = 0;
1066
1067 lpfc_ncmd->status = IOSTAT_SUCCESS;
1068 lpfc_ncmd->result = 0;
1069 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
1070 nCmd->transferred_length = nCmd->payload_length;
1071 } else {
1072 lpfc_ncmd->status = (status & LPFC_IOCB_STATUS_MASK);
1073 lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
1074
1075 /* For NVME, the only failure path that results in an
1076 * IO error is when the adapter rejects it. All other
1077 * conditions are a success case and resolved by the
1078 * transport.
1079 * IOSTAT_FCP_RSP_ERROR means:
1080 * 1. Length of data received doesn't match total
1081 * transfer length in WQE
1082 * 2. If the RSP payload does NOT match these cases:
1083 * a. RSP length 12/24 bytes and all zeros
1084 * b. NVME ERSP
1085 */
1086 switch (lpfc_ncmd->status) {
1087 case IOSTAT_SUCCESS:
1088 nCmd->transferred_length = wcqe->total_data_placed;
1089 nCmd->rcv_rsplen = 0;
1090 nCmd->status = 0;
1091 break;
1092 case IOSTAT_FCP_RSP_ERROR:
1093 nCmd->transferred_length = wcqe->total_data_placed;
1094 nCmd->rcv_rsplen = wcqe->parameter;
1095 nCmd->status = 0;
1096 /* Sanity check */
1097 if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN)
1098 break;
1099 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1100 "6081 NVME Completion Protocol Error: "
1101 "xri %x status x%x result x%x "
1102 "placed x%x\n",
1103 lpfc_ncmd->cur_iocbq.sli4_xritag,
1104 lpfc_ncmd->status, lpfc_ncmd->result,
1105 wcqe->total_data_placed);
1106 break;
1107 case IOSTAT_LOCAL_REJECT:
1108 /* Let fall through to set command final state. */
1109 if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
1110 lpfc_printf_vlog(vport, KERN_INFO,
1111 LOG_NVME_IOERR,
1112 "6032 Delay Aborted cmd %p "
1113 "nvme cmd %p, xri x%x, "
1114 "xb %d\n",
1115 lpfc_ncmd, nCmd,
1116 lpfc_ncmd->cur_iocbq.sli4_xritag,
1117 bf_get(lpfc_wcqe_c_xb, wcqe));
1118 default:
1119 out_err:
1120 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1121 "6072 NVME Completion Error: xri %x "
1122 "status x%x result x%x placed x%x\n",
1123 lpfc_ncmd->cur_iocbq.sli4_xritag,
1124 lpfc_ncmd->status, lpfc_ncmd->result,
1125 wcqe->total_data_placed);
1126 nCmd->transferred_length = 0;
1127 nCmd->rcv_rsplen = 0;
1128 nCmd->status = NVME_SC_INTERNAL;
1129 }
1130 }
1131
1132 /* pick up SLI4 exhange busy condition */
1133 if (bf_get(lpfc_wcqe_c_xb, wcqe))
1134 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1135 else
1136 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1137
1138 if (ndlp && NLP_CHK_NODE_ACT(ndlp))
1139 atomic_dec(&ndlp->cmd_pending);
1140
1141 /* Update stats and complete the IO. There is
1142 * no need for dma unprep because the nvme_transport
1143 * owns the dma address.
1144 */
1145 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1146 if (lpfc_ncmd->ts_cmd_start) {
1147 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
1148 lpfc_ncmd->ts_data_nvme = ktime_get_ns();
1149 phba->ktime_last_cmd = lpfc_ncmd->ts_data_nvme;
1150 lpfc_nvme_ktime(phba, lpfc_ncmd);
1151 }
1152 if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
1153 if (lpfc_ncmd->cpu != smp_processor_id())
1154 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1155 "6701 CPU Check cmpl: "
1156 "cpu %d expect %d\n",
1157 smp_processor_id(), lpfc_ncmd->cpu);
1158 if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
1159 phba->cpucheck_cmpl_io[lpfc_ncmd->cpu]++;
1160 }
1161 #endif
1162
1163 /* NVME targets need completion held off until the abort exchange
1164 * completes unless the NVME Rport is getting unregistered.
1165 */
1166
1167 if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
1168 freqpriv = nCmd->private;
1169 freqpriv->nvme_buf = NULL;
1170 nCmd->done(nCmd);
1171 lpfc_ncmd->nvmeCmd = NULL;
1172 }
1173
1174 spin_lock_irqsave(&phba->hbalock, flags);
1175 lpfc_ncmd->nrport = NULL;
1176 spin_unlock_irqrestore(&phba->hbalock, flags);
1177
1178 /* Call release with XB=1 to queue the IO into the abort list. */
1179 lpfc_release_nvme_buf(phba, lpfc_ncmd);
1180 }
1181
1182
1183 /**
1184 * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
1185 * @lpfc_pnvme: Pointer to the driver's nvme instance data
1186 * @lpfc_nvme_lport: Pointer to the driver's local port data
1187 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1188 * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1189 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1190 *
1191 * Driver registers this routine as it io request handler. This
1192 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1193 * data structure to the rport indicated in @lpfc_nvme_rport.
1194 *
1195 * Return value :
1196 * 0 - Success
1197 * TODO: What are the failure codes.
1198 **/
1199 static int
1200 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
1201 struct lpfc_nvme_buf *lpfc_ncmd,
1202 struct lpfc_nodelist *pnode,
1203 struct lpfc_nvme_ctrl_stat *cstat)
1204 {
1205 struct lpfc_hba *phba = vport->phba;
1206 struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1207 struct lpfc_iocbq *pwqeq = &(lpfc_ncmd->cur_iocbq);
1208 union lpfc_wqe128 *wqe = &pwqeq->wqe;
1209 uint32_t req_len;
1210
1211 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1212 return -EINVAL;
1213
1214 /*
1215 * There are three possibilities here - use scatter-gather segment, use
1216 * the single mapping, or neither.
1217 */
1218 if (nCmd->sg_cnt) {
1219 if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
1220 /* From the iwrite template, initialize words 7 - 11 */
1221 memcpy(&wqe->words[7],
1222 &lpfc_iwrite_cmd_template.words[7],
1223 sizeof(uint32_t) * 5);
1224
1225 /* Word 4 */
1226 wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length;
1227
1228 /* Word 5 */
1229 if ((phba->cfg_nvme_enable_fb) &&
1230 (pnode->nlp_flag & NLP_FIRSTBURST)) {
1231 req_len = lpfc_ncmd->nvmeCmd->payload_length;
1232 if (req_len < pnode->nvme_fb_size)
1233 wqe->fcp_iwrite.initial_xfer_len =
1234 req_len;
1235 else
1236 wqe->fcp_iwrite.initial_xfer_len =
1237 pnode->nvme_fb_size;
1238 } else {
1239 wqe->fcp_iwrite.initial_xfer_len = 0;
1240 }
1241 atomic_inc(&cstat->fc4NvmeOutputRequests);
1242 } else {
1243 /* From the iread template, initialize words 7 - 11 */
1244 memcpy(&wqe->words[7],
1245 &lpfc_iread_cmd_template.words[7],
1246 sizeof(uint32_t) * 5);
1247
1248 /* Word 4 */
1249 wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
1250
1251 /* Word 5 */
1252 wqe->fcp_iread.rsrvd5 = 0;
1253
1254 atomic_inc(&cstat->fc4NvmeInputRequests);
1255 }
1256 } else {
1257 /* From the icmnd template, initialize words 4 - 11 */
1258 memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
1259 sizeof(uint32_t) * 8);
1260 atomic_inc(&cstat->fc4NvmeControlRequests);
1261 }
1262 /*
1263 * Finish initializing those WQE fields that are independent
1264 * of the nvme_cmnd request_buffer
1265 */
1266
1267 /* Word 3 */
1268 bf_set(payload_offset_len, &wqe->fcp_icmd,
1269 (nCmd->rsplen + nCmd->cmdlen));
1270
1271 /* Word 6 */
1272 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
1273 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
1274 bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
1275
1276 /* Word 8 */
1277 wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
1278
1279 /* Word 9 */
1280 bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
1281
1282 pwqeq->vport = vport;
1283 return 0;
1284 }
1285
1286
1287 /**
1288 * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
1289 * @lpfc_pnvme: Pointer to the driver's nvme instance data
1290 * @lpfc_nvme_lport: Pointer to the driver's local port data
1291 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1292 * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1293 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1294 *
1295 * Driver registers this routine as it io request handler. This
1296 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1297 * data structure to the rport indicated in @lpfc_nvme_rport.
1298 *
1299 * Return value :
1300 * 0 - Success
1301 * TODO: What are the failure codes.
1302 **/
1303 static int
1304 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
1305 struct lpfc_nvme_buf *lpfc_ncmd)
1306 {
1307 struct lpfc_hba *phba = vport->phba;
1308 struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1309 union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe;
1310 struct sli4_sge *sgl = lpfc_ncmd->nvme_sgl;
1311 struct scatterlist *data_sg;
1312 struct sli4_sge *first_data_sgl;
1313 struct ulp_bde64 *bde;
1314 dma_addr_t physaddr;
1315 uint32_t num_bde = 0;
1316 uint32_t dma_len;
1317 uint32_t dma_offset = 0;
1318 int nseg, i;
1319
1320 /* Fix up the command and response DMA stuff. */
1321 lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
1322
1323 /*
1324 * There are three possibilities here - use scatter-gather segment, use
1325 * the single mapping, or neither.
1326 */
1327 if (nCmd->sg_cnt) {
1328 /*
1329 * Jump over the cmd and rsp SGEs. The fix routine
1330 * has already adjusted for this.
1331 */
1332 sgl += 2;
1333
1334 first_data_sgl = sgl;
1335 lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
1336 if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) {
1337 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1338 "6058 Too many sg segments from "
1339 "NVME Transport. Max %d, "
1340 "nvmeIO sg_cnt %d\n",
1341 phba->cfg_nvme_seg_cnt + 1,
1342 lpfc_ncmd->seg_cnt);
1343 lpfc_ncmd->seg_cnt = 0;
1344 return 1;
1345 }
1346
1347 /*
1348 * The driver established a maximum scatter-gather segment count
1349 * during probe that limits the number of sg elements in any
1350 * single nvme command. Just run through the seg_cnt and format
1351 * the sge's.
1352 */
1353 nseg = nCmd->sg_cnt;
1354 data_sg = nCmd->first_sgl;
1355 for (i = 0; i < nseg; i++) {
1356 if (data_sg == NULL) {
1357 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1358 "6059 dptr err %d, nseg %d\n",
1359 i, nseg);
1360 lpfc_ncmd->seg_cnt = 0;
1361 return 1;
1362 }
1363 physaddr = data_sg->dma_address;
1364 dma_len = data_sg->length;
1365 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1366 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1367 sgl->word2 = le32_to_cpu(sgl->word2);
1368 if ((num_bde + 1) == nseg)
1369 bf_set(lpfc_sli4_sge_last, sgl, 1);
1370 else
1371 bf_set(lpfc_sli4_sge_last, sgl, 0);
1372 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1373 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
1374 sgl->word2 = cpu_to_le32(sgl->word2);
1375 sgl->sge_len = cpu_to_le32(dma_len);
1376
1377 dma_offset += dma_len;
1378 data_sg = sg_next(data_sg);
1379 sgl++;
1380 }
1381 if (phba->nvme_embed_pbde) {
1382 /* Use PBDE support for first SGL only, offset == 0 */
1383 /* Words 13-15 */
1384 bde = (struct ulp_bde64 *)
1385 &wqe->words[13];
1386 bde->addrLow = first_data_sgl->addr_lo;
1387 bde->addrHigh = first_data_sgl->addr_hi;
1388 bde->tus.f.bdeSize =
1389 le32_to_cpu(first_data_sgl->sge_len);
1390 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1391 bde->tus.w = cpu_to_le32(bde->tus.w);
1392 /* wqe_pbde is 1 in template */
1393 } else {
1394 memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
1395 bf_set(wqe_pbde, &wqe->generic.wqe_com, 0);
1396 }
1397 } else {
1398 bf_set(wqe_pbde, &wqe->generic.wqe_com, 0);
1399 memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
1400
1401 /* For this clause to be valid, the payload_length
1402 * and sg_cnt must zero.
1403 */
1404 if (nCmd->payload_length != 0) {
1405 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1406 "6063 NVME DMA Prep Err: sg_cnt %d "
1407 "payload_length x%x\n",
1408 nCmd->sg_cnt, nCmd->payload_length);
1409 return 1;
1410 }
1411 }
1412 return 0;
1413 }
1414
1415 /**
1416 * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
1417 * @lpfc_pnvme: Pointer to the driver's nvme instance data
1418 * @lpfc_nvme_lport: Pointer to the driver's local port data
1419 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1420 * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1421 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1422 *
1423 * Driver registers this routine as it io request handler. This
1424 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1425 * data structure to the rport
1426 indicated in @lpfc_nvme_rport.
1427 *
1428 * Return value :
1429 * 0 - Success
1430 * TODO: What are the failure codes.
1431 **/
1432 static int
1433 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
1434 struct nvme_fc_remote_port *pnvme_rport,
1435 void *hw_queue_handle,
1436 struct nvmefc_fcp_req *pnvme_fcreq)
1437 {
1438 int ret = 0;
1439 int expedite = 0;
1440 int idx;
1441 struct lpfc_nvme_lport *lport;
1442 struct lpfc_nvme_ctrl_stat *cstat;
1443 struct lpfc_vport *vport;
1444 struct lpfc_hba *phba;
1445 struct lpfc_nodelist *ndlp;
1446 struct lpfc_nvme_buf *lpfc_ncmd;
1447 struct lpfc_nvme_rport *rport;
1448 struct lpfc_nvme_qhandle *lpfc_queue_info;
1449 struct lpfc_nvme_fcpreq_priv *freqpriv;
1450 struct nvme_common_command *sqe;
1451 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1452 uint64_t start = 0;
1453 #endif
1454
1455 /* Validate pointers. LLDD fault handling with transport does
1456 * have timing races.
1457 */
1458 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1459 if (unlikely(!lport)) {
1460 ret = -EINVAL;
1461 goto out_fail;
1462 }
1463
1464 vport = lport->vport;
1465
1466 if (unlikely(!hw_queue_handle)) {
1467 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1468 "6117 Fail IO, NULL hw_queue_handle\n");
1469 atomic_inc(&lport->xmt_fcp_err);
1470 ret = -EBUSY;
1471 goto out_fail;
1472 }
1473
1474 phba = vport->phba;
1475
1476 if (vport->load_flag & FC_UNLOADING) {
1477 ret = -ENODEV;
1478 goto out_fail;
1479 }
1480
1481 if (vport->load_flag & FC_UNLOADING) {
1482 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1483 "6124 Fail IO, Driver unload\n");
1484 atomic_inc(&lport->xmt_fcp_err);
1485 ret = -ENODEV;
1486 goto out_fail;
1487 }
1488
1489 freqpriv = pnvme_fcreq->private;
1490 if (unlikely(!freqpriv)) {
1491 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1492 "6158 Fail IO, NULL request data\n");
1493 atomic_inc(&lport->xmt_fcp_err);
1494 ret = -EINVAL;
1495 goto out_fail;
1496 }
1497
1498 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1499 if (phba->ktime_on)
1500 start = ktime_get_ns();
1501 #endif
1502 rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1503 lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
1504
1505 /*
1506 * Catch race where our node has transitioned, but the
1507 * transport is still transitioning.
1508 */
1509 ndlp = rport->ndlp;
1510 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1511 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1512 "6053 Fail IO, ndlp not ready: rport %p "
1513 "ndlp %p, DID x%06x\n",
1514 rport, ndlp, pnvme_rport->port_id);
1515 atomic_inc(&lport->xmt_fcp_err);
1516 ret = -EBUSY;
1517 goto out_fail;
1518 }
1519
1520 /* The remote node has to be a mapped target or it's an error. */
1521 if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
1522 (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
1523 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1524 "6036 Fail IO, DID x%06x not ready for "
1525 "IO. State x%x, Type x%x Flg x%x\n",
1526 pnvme_rport->port_id,
1527 ndlp->nlp_state, ndlp->nlp_type,
1528 ndlp->upcall_flags);
1529 atomic_inc(&lport->xmt_fcp_bad_ndlp);
1530 ret = -EBUSY;
1531 goto out_fail;
1532
1533 }
1534
1535 /* Currently only NVME Keep alive commands should be expedited
1536 * if the driver runs out of a resource. These should only be
1537 * issued on the admin queue, qidx 0
1538 */
1539 if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) {
1540 sqe = &((struct nvme_fc_cmd_iu *)
1541 pnvme_fcreq->cmdaddr)->sqe.common;
1542 if (sqe->opcode == nvme_admin_keep_alive)
1543 expedite = 1;
1544 }
1545
1546 /* The node is shared with FCP IO, make sure the IO pending count does
1547 * not exceed the programmed depth.
1548 */
1549 if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) &&
1550 !expedite) {
1551 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1552 "6174 Fail IO, ndlp qdepth exceeded: "
1553 "idx %d DID %x pend %d qdepth %d\n",
1554 lpfc_queue_info->index, ndlp->nlp_DID,
1555 atomic_read(&ndlp->cmd_pending),
1556 ndlp->cmd_qdepth);
1557 atomic_inc(&lport->xmt_fcp_qdepth);
1558 ret = -EBUSY;
1559 goto out_fail;
1560 }
1561
1562 lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, expedite);
1563 if (lpfc_ncmd == NULL) {
1564 atomic_inc(&lport->xmt_fcp_noxri);
1565 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1566 "6065 Fail IO, driver buffer pool is empty: "
1567 "idx %d DID %x\n",
1568 lpfc_queue_info->index, ndlp->nlp_DID);
1569 ret = -EBUSY;
1570 goto out_fail;
1571 }
1572 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1573 if (start) {
1574 lpfc_ncmd->ts_cmd_start = start;
1575 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
1576 } else {
1577 lpfc_ncmd->ts_cmd_start = 0;
1578 }
1579 #endif
1580
1581 /*
1582 * Store the data needed by the driver to issue, abort, and complete
1583 * an IO.
1584 * Do not let the IO hang out forever. There is no midlayer issuing
1585 * an abort so inform the FW of the maximum IO pending time.
1586 */
1587 freqpriv->nvme_buf = lpfc_ncmd;
1588 lpfc_ncmd->nvmeCmd = pnvme_fcreq;
1589 lpfc_ncmd->nrport = rport;
1590 lpfc_ncmd->ndlp = ndlp;
1591 lpfc_ncmd->start_time = jiffies;
1592
1593 /*
1594 * Issue the IO on the WQ indicated by index in the hw_queue_handle.
1595 * This identfier was create in our hardware queue create callback
1596 * routine. The driver now is dependent on the IO queue steering from
1597 * the transport. We are trusting the upper NVME layers know which
1598 * index to use and that they have affinitized a CPU to this hardware
1599 * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
1600 */
1601 idx = lpfc_queue_info->index;
1602 lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
1603 cstat = &lport->cstat[idx];
1604
1605 lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat);
1606 ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
1607 if (ret) {
1608 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1609 "6175 Fail IO, Prep DMA: "
1610 "idx %d DID %x\n",
1611 lpfc_queue_info->index, ndlp->nlp_DID);
1612 atomic_inc(&lport->xmt_fcp_err);
1613 ret = -ENOMEM;
1614 goto out_free_nvme_buf;
1615 }
1616
1617 atomic_inc(&ndlp->cmd_pending);
1618
1619 lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
1620 lpfc_ncmd->cur_iocbq.sli4_xritag,
1621 lpfc_queue_info->index, ndlp->nlp_DID);
1622
1623 ret = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, &lpfc_ncmd->cur_iocbq);
1624 if (ret) {
1625 atomic_inc(&lport->xmt_fcp_wqerr);
1626 atomic_dec(&ndlp->cmd_pending);
1627 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1628 "6113 Fail IO, Could not issue WQE err %x "
1629 "sid: x%x did: x%x oxid: x%x\n",
1630 ret, vport->fc_myDID, ndlp->nlp_DID,
1631 lpfc_ncmd->cur_iocbq.sli4_xritag);
1632 goto out_free_nvme_buf;
1633 }
1634
1635 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1636 if (lpfc_ncmd->ts_cmd_start)
1637 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
1638
1639 if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
1640 lpfc_ncmd->cpu = smp_processor_id();
1641 if (lpfc_ncmd->cpu != lpfc_queue_info->index) {
1642 /* Check for admin queue */
1643 if (lpfc_queue_info->qidx) {
1644 lpfc_printf_vlog(vport,
1645 KERN_ERR, LOG_NVME_IOERR,
1646 "6702 CPU Check cmd: "
1647 "cpu %d wq %d\n",
1648 lpfc_ncmd->cpu,
1649 lpfc_queue_info->index);
1650 }
1651 lpfc_ncmd->cpu = lpfc_queue_info->index;
1652 }
1653 if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
1654 phba->cpucheck_xmt_io[lpfc_ncmd->cpu]++;
1655 }
1656 #endif
1657 return 0;
1658
1659 out_free_nvme_buf:
1660 if (lpfc_ncmd->nvmeCmd->sg_cnt) {
1661 if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
1662 atomic_dec(&cstat->fc4NvmeOutputRequests);
1663 else
1664 atomic_dec(&cstat->fc4NvmeInputRequests);
1665 } else
1666 atomic_dec(&cstat->fc4NvmeControlRequests);
1667 lpfc_release_nvme_buf(phba, lpfc_ncmd);
1668 out_fail:
1669 return ret;
1670 }
1671
1672 /**
1673 * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
1674 * @phba: Pointer to HBA context object
1675 * @cmdiocb: Pointer to command iocb object.
1676 * @rspiocb: Pointer to response iocb object.
1677 *
1678 * This is the callback function for any NVME FCP IO that was aborted.
1679 *
1680 * Return value:
1681 * None
1682 **/
1683 void
1684 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1685 struct lpfc_wcqe_complete *abts_cmpl)
1686 {
1687 lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1688 "6145 ABORT_XRI_CN completing on rpi x%x "
1689 "original iotag x%x, abort cmd iotag x%x "
1690 "req_tag x%x, status x%x, hwstatus x%x\n",
1691 cmdiocb->iocb.un.acxri.abortContextTag,
1692 cmdiocb->iocb.un.acxri.abortIoTag,
1693 cmdiocb->iotag,
1694 bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
1695 bf_get(lpfc_wcqe_c_status, abts_cmpl),
1696 bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
1697 lpfc_sli_release_iocbq(phba, cmdiocb);
1698 }
1699
1700 /**
1701 * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
1702 * @lpfc_pnvme: Pointer to the driver's nvme instance data
1703 * @lpfc_nvme_lport: Pointer to the driver's local port data
1704 * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1705 * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1706 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1707 *
1708 * Driver registers this routine as its nvme request io abort handler. This
1709 * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
1710 * data structure to the rport indicated in @lpfc_nvme_rport. This routine
1711 * is executed asynchronously - one the target is validated as "MAPPED" and
1712 * ready for IO, the driver issues the abort request and returns.
1713 *
1714 * Return value:
1715 * None
1716 **/
1717 static void
1718 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
1719 struct nvme_fc_remote_port *pnvme_rport,
1720 void *hw_queue_handle,
1721 struct nvmefc_fcp_req *pnvme_fcreq)
1722 {
1723 struct lpfc_nvme_lport *lport;
1724 struct lpfc_vport *vport;
1725 struct lpfc_hba *phba;
1726 struct lpfc_nvme_buf *lpfc_nbuf;
1727 struct lpfc_iocbq *abts_buf;
1728 struct lpfc_iocbq *nvmereq_wqe;
1729 struct lpfc_nvme_fcpreq_priv *freqpriv;
1730 union lpfc_wqe128 *abts_wqe;
1731 unsigned long flags;
1732 int ret_val;
1733
1734 /* Validate pointers. LLDD fault handling with transport does
1735 * have timing races.
1736 */
1737 lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1738 if (unlikely(!lport))
1739 return;
1740
1741 vport = lport->vport;
1742
1743 if (unlikely(!hw_queue_handle)) {
1744 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1745 "6129 Fail Abort, HW Queue Handle NULL.\n");
1746 return;
1747 }
1748
1749 phba = vport->phba;
1750 freqpriv = pnvme_fcreq->private;
1751
1752 if (unlikely(!freqpriv))
1753 return;
1754 if (vport->load_flag & FC_UNLOADING)
1755 return;
1756
1757 /* Announce entry to new IO submit field. */
1758 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1759 "6002 Abort Request to rport DID x%06x "
1760 "for nvme_fc_req %p\n",
1761 pnvme_rport->port_id,
1762 pnvme_fcreq);
1763
1764 /* If the hba is getting reset, this flag is set. It is
1765 * cleared when the reset is complete and rings reestablished.
1766 */
1767 spin_lock_irqsave(&phba->hbalock, flags);
1768 /* driver queued commands are in process of being flushed */
1769 if (phba->hba_flag & HBA_NVME_IOQ_FLUSH) {
1770 spin_unlock_irqrestore(&phba->hbalock, flags);
1771 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1772 "6139 Driver in reset cleanup - flushing "
1773 "NVME Req now. hba_flag x%x\n",
1774 phba->hba_flag);
1775 return;
1776 }
1777
1778 lpfc_nbuf = freqpriv->nvme_buf;
1779 if (!lpfc_nbuf) {
1780 spin_unlock_irqrestore(&phba->hbalock, flags);
1781 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1782 "6140 NVME IO req has no matching lpfc nvme "
1783 "io buffer. Skipping abort req.\n");
1784 return;
1785 } else if (!lpfc_nbuf->nvmeCmd) {
1786 spin_unlock_irqrestore(&phba->hbalock, flags);
1787 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1788 "6141 lpfc NVME IO req has no nvme_fcreq "
1789 "io buffer. Skipping abort req.\n");
1790 return;
1791 }
1792 nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
1793
1794 /*
1795 * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
1796 * state must match the nvme_fcreq passed by the nvme
1797 * transport. If they don't match, it is likely the driver
1798 * has already completed the NVME IO and the nvme transport
1799 * has not seen it yet.
1800 */
1801 if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
1802 spin_unlock_irqrestore(&phba->hbalock, flags);
1803 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1804 "6143 NVME req mismatch: "
1805 "lpfc_nbuf %p nvmeCmd %p, "
1806 "pnvme_fcreq %p. Skipping Abort xri x%x\n",
1807 lpfc_nbuf, lpfc_nbuf->nvmeCmd,
1808 pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1809 return;
1810 }
1811
1812 /* Don't abort IOs no longer on the pending queue. */
1813 if (!(nvmereq_wqe->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
1814 spin_unlock_irqrestore(&phba->hbalock, flags);
1815 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1816 "6142 NVME IO req %p not queued - skipping "
1817 "abort req xri x%x\n",
1818 pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1819 return;
1820 }
1821
1822 atomic_inc(&lport->xmt_fcp_abort);
1823 lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
1824 nvmereq_wqe->sli4_xritag,
1825 nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
1826
1827 /* Outstanding abort is in progress */
1828 if (nvmereq_wqe->iocb_flag & LPFC_DRIVER_ABORTED) {
1829 spin_unlock_irqrestore(&phba->hbalock, flags);
1830 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1831 "6144 Outstanding NVME I/O Abort Request "
1832 "still pending on nvme_fcreq %p, "
1833 "lpfc_ncmd %p xri x%x\n",
1834 pnvme_fcreq, lpfc_nbuf,
1835 nvmereq_wqe->sli4_xritag);
1836 return;
1837 }
1838
1839 abts_buf = __lpfc_sli_get_iocbq(phba);
1840 if (!abts_buf) {
1841 spin_unlock_irqrestore(&phba->hbalock, flags);
1842 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1843 "6136 No available abort wqes. Skipping "
1844 "Abts req for nvme_fcreq %p xri x%x\n",
1845 pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1846 return;
1847 }
1848
1849 /* Ready - mark outstanding as aborted by driver. */
1850 nvmereq_wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
1851
1852 /* Complete prepping the abort wqe and issue to the FW. */
1853 abts_wqe = &abts_buf->wqe;
1854
1855 /* WQEs are reused. Clear stale data and set key fields to
1856 * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
1857 */
1858 memset(abts_wqe, 0, sizeof(union lpfc_wqe));
1859 bf_set(abort_cmd_criteria, &abts_wqe->abort_cmd, T_XRI_TAG);
1860
1861 /* word 7 */
1862 bf_set(wqe_ct, &abts_wqe->abort_cmd.wqe_com, 0);
1863 bf_set(wqe_cmnd, &abts_wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
1864 bf_set(wqe_class, &abts_wqe->abort_cmd.wqe_com,
1865 nvmereq_wqe->iocb.ulpClass);
1866
1867 /* word 8 - tell the FW to abort the IO associated with this
1868 * outstanding exchange ID.
1869 */
1870 abts_wqe->abort_cmd.wqe_com.abort_tag = nvmereq_wqe->sli4_xritag;
1871
1872 /* word 9 - this is the iotag for the abts_wqe completion. */
1873 bf_set(wqe_reqtag, &abts_wqe->abort_cmd.wqe_com,
1874 abts_buf->iotag);
1875
1876 /* word 10 */
1877 bf_set(wqe_wqid, &abts_wqe->abort_cmd.wqe_com, nvmereq_wqe->hba_wqidx);
1878 bf_set(wqe_qosd, &abts_wqe->abort_cmd.wqe_com, 1);
1879 bf_set(wqe_lenloc, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
1880
1881 /* word 11 */
1882 bf_set(wqe_cmd_type, &abts_wqe->abort_cmd.wqe_com, OTHER_COMMAND);
1883 bf_set(wqe_wqec, &abts_wqe->abort_cmd.wqe_com, 1);
1884 bf_set(wqe_cqid, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
1885
1886 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
1887 abts_buf->iocb_flag |= LPFC_IO_NVME;
1888 abts_buf->hba_wqidx = nvmereq_wqe->hba_wqidx;
1889 abts_buf->vport = vport;
1890 abts_buf->wqe_cmpl = lpfc_nvme_abort_fcreq_cmpl;
1891 ret_val = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, abts_buf);
1892 spin_unlock_irqrestore(&phba->hbalock, flags);
1893 if (ret_val) {
1894 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1895 "6137 Failed abts issue_wqe with status x%x "
1896 "for nvme_fcreq %p.\n",
1897 ret_val, pnvme_fcreq);
1898 lpfc_sli_release_iocbq(phba, abts_buf);
1899 return;
1900 }
1901
1902 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1903 "6138 Transport Abort NVME Request Issued for "
1904 "ox_id x%x on reqtag x%x\n",
1905 nvmereq_wqe->sli4_xritag,
1906 abts_buf->iotag);
1907 }
1908
1909 /* Declare and initialization an instance of the FC NVME template. */
1910 static struct nvme_fc_port_template lpfc_nvme_template = {
1911 /* initiator-based functions */
1912 .localport_delete = lpfc_nvme_localport_delete,
1913 .remoteport_delete = lpfc_nvme_remoteport_delete,
1914 .create_queue = lpfc_nvme_create_queue,
1915 .delete_queue = lpfc_nvme_delete_queue,
1916 .ls_req = lpfc_nvme_ls_req,
1917 .fcp_io = lpfc_nvme_fcp_io_submit,
1918 .ls_abort = lpfc_nvme_ls_abort,
1919 .fcp_abort = lpfc_nvme_fcp_abort,
1920
1921 .max_hw_queues = 1,
1922 .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1923 .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1924 .dma_boundary = 0xFFFFFFFF,
1925
1926 /* Sizes of additional private data for data structures.
1927 * No use for the last two sizes at this time.
1928 */
1929 .local_priv_sz = sizeof(struct lpfc_nvme_lport),
1930 .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
1931 .lsrqst_priv_sz = 0,
1932 .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
1933 };
1934
1935 /**
1936 * lpfc_sli4_post_nvme_sgl_block - post a block of nvme sgl list to firmware
1937 * @phba: pointer to lpfc hba data structure.
1938 * @nblist: pointer to nvme buffer list.
1939 * @count: number of scsi buffers on the list.
1940 *
1941 * This routine is invoked to post a block of @count scsi sgl pages from a
1942 * SCSI buffer list @nblist to the HBA using non-embedded mailbox command.
1943 * No Lock is held.
1944 *
1945 **/
1946 static int
1947 lpfc_sli4_post_nvme_sgl_block(struct lpfc_hba *phba,
1948 struct list_head *nblist,
1949 int count)
1950 {
1951 struct lpfc_nvme_buf *lpfc_ncmd;
1952 struct lpfc_mbx_post_uembed_sgl_page1 *sgl;
1953 struct sgl_page_pairs *sgl_pg_pairs;
1954 void *viraddr;
1955 LPFC_MBOXQ_t *mbox;
1956 uint32_t reqlen, alloclen, pg_pairs;
1957 uint32_t mbox_tmo;
1958 uint16_t xritag_start = 0;
1959 int rc = 0;
1960 uint32_t shdr_status, shdr_add_status;
1961 dma_addr_t pdma_phys_bpl1;
1962 union lpfc_sli4_cfg_shdr *shdr;
1963
1964 /* Calculate the requested length of the dma memory */
1965 reqlen = count * sizeof(struct sgl_page_pairs) +
1966 sizeof(union lpfc_sli4_cfg_shdr) + sizeof(uint32_t);
1967 if (reqlen > SLI4_PAGE_SIZE) {
1968 lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
1969 "6118 Block sgl registration required DMA "
1970 "size (%d) great than a page\n", reqlen);
1971 return -ENOMEM;
1972 }
1973 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1974 if (!mbox) {
1975 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
1976 "6119 Failed to allocate mbox cmd memory\n");
1977 return -ENOMEM;
1978 }
1979
1980 /* Allocate DMA memory and set up the non-embedded mailbox command */
1981 alloclen = lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
1982 LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES, reqlen,
1983 LPFC_SLI4_MBX_NEMBED);
1984
1985 if (alloclen < reqlen) {
1986 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
1987 "6120 Allocated DMA memory size (%d) is "
1988 "less than the requested DMA memory "
1989 "size (%d)\n", alloclen, reqlen);
1990 lpfc_sli4_mbox_cmd_free(phba, mbox);
1991 return -ENOMEM;
1992 }
1993
1994 /* Get the first SGE entry from the non-embedded DMA memory */
1995 viraddr = mbox->sge_array->addr[0];
1996
1997 /* Set up the SGL pages in the non-embedded DMA pages */
1998 sgl = (struct lpfc_mbx_post_uembed_sgl_page1 *)viraddr;
1999 sgl_pg_pairs = &sgl->sgl_pg_pairs;
2000
2001 pg_pairs = 0;
2002 list_for_each_entry(lpfc_ncmd, nblist, list) {
2003 /* Set up the sge entry */
2004 sgl_pg_pairs->sgl_pg0_addr_lo =
2005 cpu_to_le32(putPaddrLow(lpfc_ncmd->dma_phys_sgl));
2006 sgl_pg_pairs->sgl_pg0_addr_hi =
2007 cpu_to_le32(putPaddrHigh(lpfc_ncmd->dma_phys_sgl));
2008 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
2009 pdma_phys_bpl1 = lpfc_ncmd->dma_phys_sgl +
2010 SGL_PAGE_SIZE;
2011 else
2012 pdma_phys_bpl1 = 0;
2013 sgl_pg_pairs->sgl_pg1_addr_lo =
2014 cpu_to_le32(putPaddrLow(pdma_phys_bpl1));
2015 sgl_pg_pairs->sgl_pg1_addr_hi =
2016 cpu_to_le32(putPaddrHigh(pdma_phys_bpl1));
2017 /* Keep the first xritag on the list */
2018 if (pg_pairs == 0)
2019 xritag_start = lpfc_ncmd->cur_iocbq.sli4_xritag;
2020 sgl_pg_pairs++;
2021 pg_pairs++;
2022 }
2023 bf_set(lpfc_post_sgl_pages_xri, sgl, xritag_start);
2024 bf_set(lpfc_post_sgl_pages_xricnt, sgl, pg_pairs);
2025 /* Perform endian conversion if necessary */
2026 sgl->word0 = cpu_to_le32(sgl->word0);
2027
2028 if (!phba->sli4_hba.intr_enable)
2029 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
2030 else {
2031 mbox_tmo = lpfc_mbox_tmo_val(phba, mbox);
2032 rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
2033 }
2034 shdr = (union lpfc_sli4_cfg_shdr *)&sgl->cfg_shdr;
2035 shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
2036 shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
2037 if (rc != MBX_TIMEOUT)
2038 lpfc_sli4_mbox_cmd_free(phba, mbox);
2039 if (shdr_status || shdr_add_status || rc) {
2040 lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
2041 "6125 POST_SGL_BLOCK mailbox command failed "
2042 "status x%x add_status x%x mbx status x%x\n",
2043 shdr_status, shdr_add_status, rc);
2044 rc = -ENXIO;
2045 }
2046 return rc;
2047 }
2048
2049 /**
2050 * lpfc_post_nvme_sgl_list - Post blocks of nvme buffer sgls from a list
2051 * @phba: pointer to lpfc hba data structure.
2052 * @post_nblist: pointer to the nvme buffer list.
2053 *
2054 * This routine walks a list of nvme buffers that was passed in. It attempts
2055 * to construct blocks of nvme buffer sgls which contains contiguous xris and
2056 * uses the non-embedded SGL block post mailbox commands to post to the port.
2057 * For single NVME buffer sgl with non-contiguous xri, if any, it shall use
2058 * embedded SGL post mailbox command for posting. The @post_nblist passed in
2059 * must be local list, thus no lock is needed when manipulate the list.
2060 *
2061 * Returns: 0 = failure, non-zero number of successfully posted buffers.
2062 **/
2063 static int
2064 lpfc_post_nvme_sgl_list(struct lpfc_hba *phba,
2065 struct list_head *post_nblist, int sb_count)
2066 {
2067 struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
2068 int status, sgl_size;
2069 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
2070 dma_addr_t pdma_phys_sgl1;
2071 int last_xritag = NO_XRI;
2072 int cur_xritag;
2073 LIST_HEAD(prep_nblist);
2074 LIST_HEAD(blck_nblist);
2075 LIST_HEAD(nvme_nblist);
2076
2077 /* sanity check */
2078 if (sb_count <= 0)
2079 return -EINVAL;
2080
2081 sgl_size = phba->cfg_sg_dma_buf_size;
2082
2083 list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next, post_nblist, list) {
2084 list_del_init(&lpfc_ncmd->list);
2085 block_cnt++;
2086 if ((last_xritag != NO_XRI) &&
2087 (lpfc_ncmd->cur_iocbq.sli4_xritag != last_xritag + 1)) {
2088 /* a hole in xri block, form a sgl posting block */
2089 list_splice_init(&prep_nblist, &blck_nblist);
2090 post_cnt = block_cnt - 1;
2091 /* prepare list for next posting block */
2092 list_add_tail(&lpfc_ncmd->list, &prep_nblist);
2093 block_cnt = 1;
2094 } else {
2095 /* prepare list for next posting block */
2096 list_add_tail(&lpfc_ncmd->list, &prep_nblist);
2097 /* enough sgls for non-embed sgl mbox command */
2098 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
2099 list_splice_init(&prep_nblist, &blck_nblist);
2100 post_cnt = block_cnt;
2101 block_cnt = 0;
2102 }
2103 }
2104 num_posting++;
2105 last_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
2106
2107 /* end of repost sgl list condition for NVME buffers */
2108 if (num_posting == sb_count) {
2109 if (post_cnt == 0) {
2110 /* last sgl posting block */
2111 list_splice_init(&prep_nblist, &blck_nblist);
2112 post_cnt = block_cnt;
2113 } else if (block_cnt == 1) {
2114 /* last single sgl with non-contiguous xri */
2115 if (sgl_size > SGL_PAGE_SIZE)
2116 pdma_phys_sgl1 =
2117 lpfc_ncmd->dma_phys_sgl +
2118 SGL_PAGE_SIZE;
2119 else
2120 pdma_phys_sgl1 = 0;
2121 cur_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
2122 status = lpfc_sli4_post_sgl(phba,
2123 lpfc_ncmd->dma_phys_sgl,
2124 pdma_phys_sgl1, cur_xritag);
2125 if (status) {
2126 /* failure, put on abort nvme list */
2127 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
2128 } else {
2129 /* success, put on NVME buffer list */
2130 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
2131 lpfc_ncmd->status = IOSTAT_SUCCESS;
2132 num_posted++;
2133 }
2134 /* success, put on NVME buffer sgl list */
2135 list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
2136 }
2137 }
2138
2139 /* continue until a nembed page worth of sgls */
2140 if (post_cnt == 0)
2141 continue;
2142
2143 /* post block of NVME buffer list sgls */
2144 status = lpfc_sli4_post_nvme_sgl_block(phba, &blck_nblist,
2145 post_cnt);
2146
2147 /* don't reset xirtag due to hole in xri block */
2148 if (block_cnt == 0)
2149 last_xritag = NO_XRI;
2150
2151 /* reset NVME buffer post count for next round of posting */
2152 post_cnt = 0;
2153
2154 /* put posted NVME buffer-sgl posted on NVME buffer sgl list */
2155 while (!list_empty(&blck_nblist)) {
2156 list_remove_head(&blck_nblist, lpfc_ncmd,
2157 struct lpfc_nvme_buf, list);
2158 if (status) {
2159 /* failure, put on abort nvme list */
2160 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
2161 } else {
2162 /* success, put on NVME buffer list */
2163 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
2164 lpfc_ncmd->status = IOSTAT_SUCCESS;
2165 num_posted++;
2166 }
2167 list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
2168 }
2169 }
2170 /* Push NVME buffers with sgl posted to the available list */
2171 while (!list_empty(&nvme_nblist)) {
2172 list_remove_head(&nvme_nblist, lpfc_ncmd,
2173 struct lpfc_nvme_buf, list);
2174 lpfc_release_nvme_buf(phba, lpfc_ncmd);
2175 }
2176 return num_posted;
2177 }
2178
2179 /**
2180 * lpfc_repost_nvme_sgl_list - Repost all the allocated nvme buffer sgls
2181 * @phba: pointer to lpfc hba data structure.
2182 *
2183 * This routine walks the list of nvme buffers that have been allocated and
2184 * repost them to the port by using SGL block post. This is needed after a
2185 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
2186 * is responsible for moving all nvme buffers on the lpfc_abts_nvme_sgl_list
2187 * to the lpfc_nvme_buf_list. If the repost fails, reject all nvme buffers.
2188 *
2189 * Returns: 0 = success, non-zero failure.
2190 **/
2191 int
2192 lpfc_repost_nvme_sgl_list(struct lpfc_hba *phba)
2193 {
2194 LIST_HEAD(post_nblist);
2195 int num_posted, rc = 0;
2196
2197 /* get all NVME buffers need to repost to a local list */
2198 spin_lock_irq(&phba->nvme_buf_list_get_lock);
2199 spin_lock(&phba->nvme_buf_list_put_lock);
2200 list_splice_init(&phba->lpfc_nvme_buf_list_get, &post_nblist);
2201 list_splice(&phba->lpfc_nvme_buf_list_put, &post_nblist);
2202 phba->get_nvme_bufs = 0;
2203 phba->put_nvme_bufs = 0;
2204 spin_unlock(&phba->nvme_buf_list_put_lock);
2205 spin_unlock_irq(&phba->nvme_buf_list_get_lock);
2206
2207 /* post the list of nvme buffer sgls to port if available */
2208 if (!list_empty(&post_nblist)) {
2209 num_posted = lpfc_post_nvme_sgl_list(phba, &post_nblist,
2210 phba->sli4_hba.nvme_xri_cnt);
2211 /* failed to post any nvme buffer, return error */
2212 if (num_posted == 0)
2213 rc = -EIO;
2214 }
2215 return rc;
2216 }
2217
2218 /**
2219 * lpfc_new_nvme_buf - Scsi buffer allocator for HBA with SLI4 IF spec
2220 * @vport: The virtual port for which this call being executed.
2221 * @num_to_allocate: The requested number of buffers to allocate.
2222 *
2223 * This routine allocates nvme buffers for device with SLI-4 interface spec,
2224 * the nvme buffer contains all the necessary information needed to initiate
2225 * a NVME I/O. After allocating up to @num_to_allocate NVME buffers and put
2226 * them on a list, it post them to the port by using SGL block post.
2227 *
2228 * Return codes:
2229 * int - number of nvme buffers that were allocated and posted.
2230 * 0 = failure, less than num_to_alloc is a partial failure.
2231 **/
2232 static int
2233 lpfc_new_nvme_buf(struct lpfc_vport *vport, int num_to_alloc)
2234 {
2235 struct lpfc_hba *phba = vport->phba;
2236 struct lpfc_nvme_buf *lpfc_ncmd;
2237 struct lpfc_iocbq *pwqeq;
2238 union lpfc_wqe128 *wqe;
2239 struct sli4_sge *sgl;
2240 dma_addr_t pdma_phys_sgl;
2241 uint16_t iotag, lxri = 0;
2242 int bcnt, num_posted, sgl_size;
2243 LIST_HEAD(prep_nblist);
2244 LIST_HEAD(post_nblist);
2245 LIST_HEAD(nvme_nblist);
2246
2247 sgl_size = phba->cfg_sg_dma_buf_size;
2248
2249 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
2250 lpfc_ncmd = kzalloc(sizeof(struct lpfc_nvme_buf), GFP_KERNEL);
2251 if (!lpfc_ncmd)
2252 break;
2253 /*
2254 * Get memory from the pci pool to map the virt space to
2255 * pci bus space for an I/O. The DMA buffer includes the
2256 * number of SGE's necessary to support the sg_tablesize.
2257 */
2258 lpfc_ncmd->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
2259 GFP_KERNEL,
2260 &lpfc_ncmd->dma_handle);
2261 if (!lpfc_ncmd->data) {
2262 kfree(lpfc_ncmd);
2263 break;
2264 }
2265
2266 lxri = lpfc_sli4_next_xritag(phba);
2267 if (lxri == NO_XRI) {
2268 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
2269 lpfc_ncmd->data, lpfc_ncmd->dma_handle);
2270 kfree(lpfc_ncmd);
2271 break;
2272 }
2273 pwqeq = &(lpfc_ncmd->cur_iocbq);
2274 wqe = &pwqeq->wqe;
2275
2276 /* Allocate iotag for lpfc_ncmd->cur_iocbq. */
2277 iotag = lpfc_sli_next_iotag(phba, pwqeq);
2278 if (iotag == 0) {
2279 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
2280 lpfc_ncmd->data, lpfc_ncmd->dma_handle);
2281 kfree(lpfc_ncmd);
2282 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
2283 "6121 Failed to allocated IOTAG for"
2284 " XRI:0x%x\n", lxri);
2285 lpfc_sli4_free_xri(phba, lxri);
2286 break;
2287 }
2288 pwqeq->sli4_lxritag = lxri;
2289 pwqeq->sli4_xritag = phba->sli4_hba.xri_ids[lxri];
2290 pwqeq->iocb_flag |= LPFC_IO_NVME;
2291 pwqeq->context1 = lpfc_ncmd;
2292 pwqeq->wqe_cmpl = lpfc_nvme_io_cmd_wqe_cmpl;
2293
2294 /* Initialize local short-hand pointers. */
2295 lpfc_ncmd->nvme_sgl = lpfc_ncmd->data;
2296 sgl = lpfc_ncmd->nvme_sgl;
2297 pdma_phys_sgl = lpfc_ncmd->dma_handle;
2298 lpfc_ncmd->dma_phys_sgl = pdma_phys_sgl;
2299
2300 /* Rsp SGE will be filled in when we rcv an IO
2301 * from the NVME Layer to be sent.
2302 * The cmd is going to be embedded so we need a SKIP SGE.
2303 */
2304 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2305 bf_set(lpfc_sli4_sge_last, sgl, 0);
2306 sgl->word2 = cpu_to_le32(sgl->word2);
2307 /* Fill in word 3 / sgl_len during cmd submission */
2308
2309 lpfc_ncmd->cur_iocbq.context1 = lpfc_ncmd;
2310
2311 /* Initialize WQE */
2312 memset(wqe, 0, sizeof(union lpfc_wqe));
2313
2314 /* add the nvme buffer to a post list */
2315 list_add_tail(&lpfc_ncmd->list, &post_nblist);
2316 spin_lock_irq(&phba->nvme_buf_list_get_lock);
2317 phba->sli4_hba.nvme_xri_cnt++;
2318 spin_unlock_irq(&phba->nvme_buf_list_get_lock);
2319 }
2320 lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
2321 "6114 Allocate %d out of %d requested new NVME "
2322 "buffers\n", bcnt, num_to_alloc);
2323
2324 /* post the list of nvme buffer sgls to port if available */
2325 if (!list_empty(&post_nblist))
2326 num_posted = lpfc_post_nvme_sgl_list(phba,
2327 &post_nblist, bcnt);
2328 else
2329 num_posted = 0;
2330
2331 return num_posted;
2332 }
2333
2334 static inline struct lpfc_nvme_buf *
2335 lpfc_nvme_buf(struct lpfc_hba *phba)
2336 {
2337 struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
2338
2339 list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next,
2340 &phba->lpfc_nvme_buf_list_get, list) {
2341 list_del_init(&lpfc_ncmd->list);
2342 phba->get_nvme_bufs--;
2343 return lpfc_ncmd;
2344 }
2345 return NULL;
2346 }
2347
2348 /**
2349 * lpfc_get_nvme_buf - Get a nvme buffer from lpfc_nvme_buf_list of the HBA
2350 * @phba: The HBA for which this call is being executed.
2351 *
2352 * This routine removes a nvme buffer from head of @phba lpfc_nvme_buf_list list
2353 * and returns to caller.
2354 *
2355 * Return codes:
2356 * NULL - Error
2357 * Pointer to lpfc_nvme_buf - Success
2358 **/
2359 static struct lpfc_nvme_buf *
2360 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
2361 int expedite)
2362 {
2363 struct lpfc_nvme_buf *lpfc_ncmd = NULL;
2364 unsigned long iflag = 0;
2365
2366 spin_lock_irqsave(&phba->nvme_buf_list_get_lock, iflag);
2367 if (phba->get_nvme_bufs > LPFC_NVME_EXPEDITE_XRICNT || expedite)
2368 lpfc_ncmd = lpfc_nvme_buf(phba);
2369 if (!lpfc_ncmd) {
2370 spin_lock(&phba->nvme_buf_list_put_lock);
2371 list_splice(&phba->lpfc_nvme_buf_list_put,
2372 &phba->lpfc_nvme_buf_list_get);
2373 phba->get_nvme_bufs += phba->put_nvme_bufs;
2374 INIT_LIST_HEAD(&phba->lpfc_nvme_buf_list_put);
2375 phba->put_nvme_bufs = 0;
2376 spin_unlock(&phba->nvme_buf_list_put_lock);
2377 if (phba->get_nvme_bufs > LPFC_NVME_EXPEDITE_XRICNT || expedite)
2378 lpfc_ncmd = lpfc_nvme_buf(phba);
2379 }
2380 spin_unlock_irqrestore(&phba->nvme_buf_list_get_lock, iflag);
2381 return lpfc_ncmd;
2382 }
2383
2384 /**
2385 * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
2386 * @phba: The Hba for which this call is being executed.
2387 * @lpfc_ncmd: The nvme buffer which is being released.
2388 *
2389 * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
2390 * lpfc_nvme_buf_list list. For SLI4 XRI's are tied to the nvme buffer
2391 * and cannot be reused for at least RA_TOV amount of time if it was
2392 * aborted.
2393 **/
2394 static void
2395 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_nvme_buf *lpfc_ncmd)
2396 {
2397 unsigned long iflag = 0;
2398
2399 lpfc_ncmd->nonsg_phys = 0;
2400 if (lpfc_ncmd->flags & LPFC_SBUF_XBUSY) {
2401 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2402 "6310 XB release deferred for "
2403 "ox_id x%x on reqtag x%x\n",
2404 lpfc_ncmd->cur_iocbq.sli4_xritag,
2405 lpfc_ncmd->cur_iocbq.iotag);
2406
2407 spin_lock_irqsave(&phba->sli4_hba.abts_nvme_buf_list_lock,
2408 iflag);
2409 list_add_tail(&lpfc_ncmd->list,
2410 &phba->sli4_hba.lpfc_abts_nvme_buf_list);
2411 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvme_buf_list_lock,
2412 iflag);
2413 } else {
2414 lpfc_ncmd->nvmeCmd = NULL;
2415 lpfc_ncmd->cur_iocbq.iocb_flag = LPFC_IO_NVME;
2416 spin_lock_irqsave(&phba->nvme_buf_list_put_lock, iflag);
2417 list_add_tail(&lpfc_ncmd->list, &phba->lpfc_nvme_buf_list_put);
2418 phba->put_nvme_bufs++;
2419 spin_unlock_irqrestore(&phba->nvme_buf_list_put_lock, iflag);
2420 }
2421 }
2422
2423 /**
2424 * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
2425 * @pvport - the lpfc_vport instance requesting a localport.
2426 *
2427 * This routine is invoked to create an nvme localport instance to bind
2428 * to the nvme_fc_transport. It is called once during driver load
2429 * like lpfc_create_shost after all other services are initialized.
2430 * It requires a vport, vpi, and wwns at call time. Other localport
2431 * parameters are modified as the driver's FCID and the Fabric WWN
2432 * are established.
2433 *
2434 * Return codes
2435 * 0 - successful
2436 * -ENOMEM - no heap memory available
2437 * other values - from nvme registration upcall
2438 **/
2439 int
2440 lpfc_nvme_create_localport(struct lpfc_vport *vport)
2441 {
2442 int ret = 0;
2443 struct lpfc_hba *phba = vport->phba;
2444 struct nvme_fc_port_info nfcp_info;
2445 struct nvme_fc_local_port *localport;
2446 struct lpfc_nvme_lport *lport;
2447 struct lpfc_nvme_ctrl_stat *cstat;
2448 int len, i;
2449
2450 /* Initialize this localport instance. The vport wwn usage ensures
2451 * that NPIV is accounted for.
2452 */
2453 memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
2454 nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
2455 nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
2456 nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
2457
2458 /* Limit to LPFC_MAX_NVME_SEG_CNT.
2459 * For now need + 1 to get around NVME transport logic.
2460 */
2461 if (phba->cfg_sg_seg_cnt > LPFC_MAX_NVME_SEG_CNT) {
2462 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_INIT,
2463 "6300 Reducing sg segment cnt to %d\n",
2464 LPFC_MAX_NVME_SEG_CNT);
2465 phba->cfg_nvme_seg_cnt = LPFC_MAX_NVME_SEG_CNT;
2466 } else {
2467 phba->cfg_nvme_seg_cnt = phba->cfg_sg_seg_cnt;
2468 }
2469 lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
2470 lpfc_nvme_template.max_hw_queues = phba->cfg_nvme_io_channel;
2471
2472 cstat = kmalloc((sizeof(struct lpfc_nvme_ctrl_stat) *
2473 phba->cfg_nvme_io_channel), GFP_KERNEL);
2474 if (!cstat)
2475 return -ENOMEM;
2476
2477 /* localport is allocated from the stack, but the registration
2478 * call allocates heap memory as well as the private area.
2479 */
2480 #if (IS_ENABLED(CONFIG_NVME_FC))
2481 ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
2482 &vport->phba->pcidev->dev, &localport);
2483 #else
2484 ret = -ENOMEM;
2485 #endif
2486 if (!ret) {
2487 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
2488 "6005 Successfully registered local "
2489 "NVME port num %d, localP %p, private %p, "
2490 "sg_seg %d\n",
2491 localport->port_num, localport,
2492 localport->private,
2493 lpfc_nvme_template.max_sgl_segments);
2494
2495 /* Private is our lport size declared in the template. */
2496 lport = (struct lpfc_nvme_lport *)localport->private;
2497 vport->localport = localport;
2498 lport->vport = vport;
2499 lport->cstat = cstat;
2500 vport->nvmei_support = 1;
2501
2502 atomic_set(&lport->xmt_fcp_noxri, 0);
2503 atomic_set(&lport->xmt_fcp_bad_ndlp, 0);
2504 atomic_set(&lport->xmt_fcp_qdepth, 0);
2505 atomic_set(&lport->xmt_fcp_err, 0);
2506 atomic_set(&lport->xmt_fcp_wqerr, 0);
2507 atomic_set(&lport->xmt_fcp_abort, 0);
2508 atomic_set(&lport->xmt_ls_abort, 0);
2509 atomic_set(&lport->xmt_ls_err, 0);
2510 atomic_set(&lport->cmpl_fcp_xb, 0);
2511 atomic_set(&lport->cmpl_fcp_err, 0);
2512 atomic_set(&lport->cmpl_ls_xb, 0);
2513 atomic_set(&lport->cmpl_ls_err, 0);
2514 atomic_set(&lport->fc4NvmeLsRequests, 0);
2515 atomic_set(&lport->fc4NvmeLsCmpls, 0);
2516
2517 for (i = 0; i < phba->cfg_nvme_io_channel; i++) {
2518 cstat = &lport->cstat[i];
2519 atomic_set(&cstat->fc4NvmeInputRequests, 0);
2520 atomic_set(&cstat->fc4NvmeOutputRequests, 0);
2521 atomic_set(&cstat->fc4NvmeControlRequests, 0);
2522 atomic_set(&cstat->fc4NvmeIoCmpls, 0);
2523 }
2524
2525 /* Don't post more new bufs if repost already recovered
2526 * the nvme sgls.
2527 */
2528 if (phba->sli4_hba.nvme_xri_cnt == 0) {
2529 len = lpfc_new_nvme_buf(vport,
2530 phba->sli4_hba.nvme_xri_max);
2531 vport->phba->total_nvme_bufs += len;
2532 }
2533 } else {
2534 kfree(cstat);
2535 }
2536
2537 return ret;
2538 }
2539
2540 /* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg.
2541 *
2542 * The driver has to wait for the host nvme transport to callback
2543 * indicating the localport has successfully unregistered all
2544 * resources. Since this is an uninterruptible wait, loop every ten
2545 * seconds and print a message indicating no progress.
2546 *
2547 * An uninterruptible wait is used because of the risk of transport-to-
2548 * driver state mismatch.
2549 */
2550 void
2551 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
2552 struct lpfc_nvme_lport *lport)
2553 {
2554 #if (IS_ENABLED(CONFIG_NVME_FC))
2555 u32 wait_tmo;
2556 int ret;
2557
2558 /* Host transport has to clean up and confirm requiring an indefinite
2559 * wait. Print a message if a 10 second wait expires and renew the
2560 * wait. This is unexpected.
2561 */
2562 wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000);
2563 while (true) {
2564 ret = wait_for_completion_timeout(&lport->lport_unreg_done,
2565 wait_tmo);
2566 if (unlikely(!ret)) {
2567 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
2568 "6176 Lport %p Localport %p wait "
2569 "timed out. Renewing.\n",
2570 lport, vport->localport);
2571 continue;
2572 }
2573 break;
2574 }
2575 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
2576 "6177 Lport %p Localport %p Complete Success\n",
2577 lport, vport->localport);
2578 #endif
2579 }
2580
2581 /**
2582 * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
2583 * @pnvme: pointer to lpfc nvme data structure.
2584 *
2585 * This routine is invoked to destroy all lports bound to the phba.
2586 * The lport memory was allocated by the nvme fc transport and is
2587 * released there. This routine ensures all rports bound to the
2588 * lport have been disconnected.
2589 *
2590 **/
2591 void
2592 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
2593 {
2594 #if (IS_ENABLED(CONFIG_NVME_FC))
2595 struct nvme_fc_local_port *localport;
2596 struct lpfc_nvme_lport *lport;
2597 struct lpfc_nvme_ctrl_stat *cstat;
2598 int ret;
2599
2600 if (vport->nvmei_support == 0)
2601 return;
2602
2603 localport = vport->localport;
2604 vport->localport = NULL;
2605 lport = (struct lpfc_nvme_lport *)localport->private;
2606 cstat = lport->cstat;
2607
2608 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2609 "6011 Destroying NVME localport %p\n",
2610 localport);
2611
2612 /* lport's rport list is clear. Unregister
2613 * lport and release resources.
2614 */
2615 init_completion(&lport->lport_unreg_done);
2616 ret = nvme_fc_unregister_localport(localport);
2617
2618 /* Wait for completion. This either blocks
2619 * indefinitely or succeeds
2620 */
2621 lpfc_nvme_lport_unreg_wait(vport, lport);
2622 kfree(cstat);
2623
2624 /* Regardless of the unregister upcall response, clear
2625 * nvmei_support. All rports are unregistered and the
2626 * driver will clean up.
2627 */
2628 vport->nvmei_support = 0;
2629 if (ret == 0) {
2630 lpfc_printf_vlog(vport,
2631 KERN_INFO, LOG_NVME_DISC,
2632 "6009 Unregistered lport Success\n");
2633 } else {
2634 lpfc_printf_vlog(vport,
2635 KERN_INFO, LOG_NVME_DISC,
2636 "6010 Unregistered lport "
2637 "Failed, status x%x\n",
2638 ret);
2639 }
2640 #endif
2641 }
2642
2643 void
2644 lpfc_nvme_update_localport(struct lpfc_vport *vport)
2645 {
2646 #if (IS_ENABLED(CONFIG_NVME_FC))
2647 struct nvme_fc_local_port *localport;
2648 struct lpfc_nvme_lport *lport;
2649
2650 localport = vport->localport;
2651 if (!localport) {
2652 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2653 "6710 Update NVME fail. No localport\n");
2654 return;
2655 }
2656 lport = (struct lpfc_nvme_lport *)localport->private;
2657 if (!lport) {
2658 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2659 "6171 Update NVME fail. localP %p, No lport\n",
2660 localport);
2661 return;
2662 }
2663 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2664 "6012 Update NVME lport %p did x%x\n",
2665 localport, vport->fc_myDID);
2666
2667 localport->port_id = vport->fc_myDID;
2668 if (localport->port_id == 0)
2669 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
2670 else
2671 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
2672
2673 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2674 "6030 bound lport %p to DID x%06x\n",
2675 lport, localport->port_id);
2676 #endif
2677 }
2678
2679 int
2680 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2681 {
2682 #if (IS_ENABLED(CONFIG_NVME_FC))
2683 int ret = 0;
2684 struct nvme_fc_local_port *localport;
2685 struct lpfc_nvme_lport *lport;
2686 struct lpfc_nvme_rport *rport;
2687 struct lpfc_nvme_rport *oldrport;
2688 struct nvme_fc_remote_port *remote_port;
2689 struct nvme_fc_port_info rpinfo;
2690 struct lpfc_nodelist *prev_ndlp = NULL;
2691
2692 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2693 "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
2694 ndlp->nlp_DID, ndlp->nlp_type);
2695
2696 localport = vport->localport;
2697 if (!localport)
2698 return 0;
2699
2700 lport = (struct lpfc_nvme_lport *)localport->private;
2701
2702 /* NVME rports are not preserved across devloss.
2703 * Just register this instance. Note, rpinfo->dev_loss_tmo
2704 * is left 0 to indicate accept transport defaults. The
2705 * driver communicates port role capabilities consistent
2706 * with the PRLI response data.
2707 */
2708 memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
2709 rpinfo.port_id = ndlp->nlp_DID;
2710 if (ndlp->nlp_type & NLP_NVME_TARGET)
2711 rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
2712 if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2713 rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
2714
2715 if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
2716 rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
2717
2718 rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
2719 rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
2720
2721 oldrport = lpfc_ndlp_get_nrport(ndlp);
2722 if (!oldrport)
2723 lpfc_nlp_get(ndlp);
2724
2725 ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
2726 if (!ret) {
2727 /* If the ndlp already has an nrport, this is just
2728 * a resume of the existing rport. Else this is a
2729 * new rport.
2730 */
2731 /* Guard against an unregister/reregister
2732 * race that leaves the WAIT flag set.
2733 */
2734 spin_lock_irq(&vport->phba->hbalock);
2735 ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
2736 spin_unlock_irq(&vport->phba->hbalock);
2737 rport = remote_port->private;
2738 if (oldrport) {
2739 /* New remoteport record does not guarantee valid
2740 * host private memory area.
2741 */
2742 prev_ndlp = oldrport->ndlp;
2743 if (oldrport == remote_port->private) {
2744 /* Same remoteport - ndlp should match.
2745 * Just reuse.
2746 */
2747 lpfc_printf_vlog(ndlp->vport, KERN_INFO,
2748 LOG_NVME_DISC,
2749 "6014 Rebinding lport to "
2750 "remoteport %p wwpn 0x%llx, "
2751 "Data: x%x x%x %p %p x%x x%06x\n",
2752 remote_port,
2753 remote_port->port_name,
2754 remote_port->port_id,
2755 remote_port->port_role,
2756 prev_ndlp,
2757 ndlp,
2758 ndlp->nlp_type,
2759 ndlp->nlp_DID);
2760 return 0;
2761 }
2762
2763 /* Sever the ndlp<->rport association
2764 * before dropping the ndlp ref from
2765 * register.
2766 */
2767 spin_lock_irq(&vport->phba->hbalock);
2768 ndlp->nrport = NULL;
2769 ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
2770 spin_unlock_irq(&vport->phba->hbalock);
2771 rport->ndlp = NULL;
2772 rport->remoteport = NULL;
2773
2774 /* Reference only removed if previous NDLP is no longer
2775 * active. It might be just a swap and removing the
2776 * reference would cause a premature cleanup.
2777 */
2778 if (prev_ndlp && prev_ndlp != ndlp) {
2779 if ((!NLP_CHK_NODE_ACT(prev_ndlp)) ||
2780 (!prev_ndlp->nrport))
2781 lpfc_nlp_put(prev_ndlp);
2782 }
2783 }
2784
2785 /* Clean bind the rport to the ndlp. */
2786 rport->remoteport = remote_port;
2787 rport->lport = lport;
2788 rport->ndlp = ndlp;
2789 spin_lock_irq(&vport->phba->hbalock);
2790 ndlp->nrport = rport;
2791 spin_unlock_irq(&vport->phba->hbalock);
2792 lpfc_printf_vlog(vport, KERN_INFO,
2793 LOG_NVME_DISC | LOG_NODE,
2794 "6022 Binding new rport to "
2795 "lport %p Remoteport %p rport %p WWNN 0x%llx, "
2796 "Rport WWPN 0x%llx DID "
2797 "x%06x Role x%x, ndlp %p prev_ndlp %p\n",
2798 lport, remote_port, rport,
2799 rpinfo.node_name, rpinfo.port_name,
2800 rpinfo.port_id, rpinfo.port_role,
2801 ndlp, prev_ndlp);
2802 } else {
2803 lpfc_printf_vlog(vport, KERN_ERR,
2804 LOG_NVME_DISC | LOG_NODE,
2805 "6031 RemotePort Registration failed "
2806 "err: %d, DID x%06x\n",
2807 ret, ndlp->nlp_DID);
2808 }
2809
2810 return ret;
2811 #else
2812 return 0;
2813 #endif
2814 }
2815
2816 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
2817 *
2818 * There is no notion of Devloss or rport recovery from the current
2819 * nvme_transport perspective. Loss of an rport just means IO cannot
2820 * be sent and recovery is completely up to the initator.
2821 * For now, the driver just unbinds the DID and port_role so that
2822 * no further IO can be issued. Changes are planned for later.
2823 *
2824 * Notes - the ndlp reference count is not decremented here since
2825 * since there is no nvme_transport api for devloss. Node ref count
2826 * is only adjusted in driver unload.
2827 */
2828 void
2829 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2830 {
2831 #if (IS_ENABLED(CONFIG_NVME_FC))
2832 int ret;
2833 struct nvme_fc_local_port *localport;
2834 struct lpfc_nvme_lport *lport;
2835 struct lpfc_nvme_rport *rport;
2836 struct nvme_fc_remote_port *remoteport;
2837
2838 localport = vport->localport;
2839
2840 /* This is fundamental error. The localport is always
2841 * available until driver unload. Just exit.
2842 */
2843 if (!localport)
2844 return;
2845
2846 lport = (struct lpfc_nvme_lport *)localport->private;
2847 if (!lport)
2848 goto input_err;
2849
2850 rport = lpfc_ndlp_get_nrport(ndlp);
2851 if (!rport)
2852 goto input_err;
2853
2854 remoteport = rport->remoteport;
2855 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2856 "6033 Unreg nvme remoteport %p, portname x%llx, "
2857 "port_id x%06x, portstate x%x port type x%x\n",
2858 remoteport, remoteport->port_name,
2859 remoteport->port_id, remoteport->port_state,
2860 ndlp->nlp_type);
2861
2862 /* Sanity check ndlp type. Only call for NVME ports. Don't
2863 * clear any rport state until the transport calls back.
2864 */
2865
2866 if (ndlp->nlp_type & NLP_NVME_TARGET) {
2867 /* No concern about the role change on the nvme remoteport.
2868 * The transport will update it.
2869 */
2870 ndlp->upcall_flags |= NLP_WAIT_FOR_UNREG;
2871
2872 /* Don't let the host nvme transport keep sending keep-alives
2873 * on this remoteport. Vport is unloading, no recovery. The
2874 * return values is ignored. The upcall is a courtesy to the
2875 * transport.
2876 */
2877 if (vport->load_flag & FC_UNLOADING)
2878 (void)nvme_fc_set_remoteport_devloss(remoteport, 0);
2879
2880 ret = nvme_fc_unregister_remoteport(remoteport);
2881 if (ret != 0) {
2882 lpfc_nlp_put(ndlp);
2883 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2884 "6167 NVME unregister failed %d "
2885 "port_state x%x\n",
2886 ret, remoteport->port_state);
2887 }
2888 }
2889 return;
2890
2891 input_err:
2892 #endif
2893 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2894 "6168 State error: lport %p, rport%p FCID x%06x\n",
2895 vport->localport, ndlp->rport, ndlp->nlp_DID);
2896 }
2897
2898 /**
2899 * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
2900 * @phba: pointer to lpfc hba data structure.
2901 * @axri: pointer to the fcp xri abort wcqe structure.
2902 *
2903 * This routine is invoked by the worker thread to process a SLI4 fast-path
2904 * NVME aborted xri. Aborted NVME IO commands are completed to the transport
2905 * here.
2906 **/
2907 void
2908 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
2909 struct sli4_wcqe_xri_aborted *axri)
2910 {
2911 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
2912 struct lpfc_nvme_buf *lpfc_ncmd, *next_lpfc_ncmd;
2913 struct nvmefc_fcp_req *nvme_cmd = NULL;
2914 struct lpfc_nodelist *ndlp;
2915 unsigned long iflag = 0;
2916
2917 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
2918 return;
2919 spin_lock_irqsave(&phba->hbalock, iflag);
2920 spin_lock(&phba->sli4_hba.abts_nvme_buf_list_lock);
2921 list_for_each_entry_safe(lpfc_ncmd, next_lpfc_ncmd,
2922 &phba->sli4_hba.lpfc_abts_nvme_buf_list,
2923 list) {
2924 if (lpfc_ncmd->cur_iocbq.sli4_xritag == xri) {
2925 list_del_init(&lpfc_ncmd->list);
2926 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
2927 lpfc_ncmd->status = IOSTAT_SUCCESS;
2928 spin_unlock(
2929 &phba->sli4_hba.abts_nvme_buf_list_lock);
2930
2931 spin_unlock_irqrestore(&phba->hbalock, iflag);
2932 ndlp = lpfc_ncmd->ndlp;
2933 if (ndlp)
2934 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
2935
2936 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2937 "6311 nvme_cmd %p xri x%x tag x%x "
2938 "abort complete and xri released\n",
2939 lpfc_ncmd->nvmeCmd, xri,
2940 lpfc_ncmd->cur_iocbq.iotag);
2941
2942 /* Aborted NVME commands are required to not complete
2943 * before the abort exchange command fully completes.
2944 * Once completed, it is available via the put list.
2945 */
2946 if (lpfc_ncmd->nvmeCmd) {
2947 nvme_cmd = lpfc_ncmd->nvmeCmd;
2948 nvme_cmd->done(nvme_cmd);
2949 lpfc_ncmd->nvmeCmd = NULL;
2950 }
2951 lpfc_release_nvme_buf(phba, lpfc_ncmd);
2952 return;
2953 }
2954 }
2955 spin_unlock(&phba->sli4_hba.abts_nvme_buf_list_lock);
2956 spin_unlock_irqrestore(&phba->hbalock, iflag);
2957
2958 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2959 "6312 XRI Aborted xri x%x not found\n", xri);
2960
2961 }
2962
2963 /**
2964 * lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete
2965 * @phba: Pointer to HBA context object.
2966 *
2967 * This function flushes all wqes in the nvme rings and frees all resources
2968 * in the txcmplq. This function does not issue abort wqes for the IO
2969 * commands in txcmplq, they will just be returned with
2970 * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
2971 * slot has been permanently disabled.
2972 **/
2973 void
2974 lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
2975 {
2976 struct lpfc_sli_ring *pring;
2977 u32 i, wait_cnt = 0;
2978
2979 if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.nvme_wq)
2980 return;
2981
2982 /* Cycle through all NVME rings and make sure all outstanding
2983 * WQEs have been removed from the txcmplqs.
2984 */
2985 for (i = 0; i < phba->cfg_nvme_io_channel; i++) {
2986 pring = phba->sli4_hba.nvme_wq[i]->pring;
2987
2988 if (!pring)
2989 continue;
2990
2991 /* Retrieve everything on the txcmplq */
2992 while (!list_empty(&pring->txcmplq)) {
2993 msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1);
2994 wait_cnt++;
2995
2996 /* The sleep is 10mS. Every ten seconds,
2997 * dump a message. Something is wrong.
2998 */
2999 if ((wait_cnt % 1000) == 0) {
3000 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
3001 "6178 NVME IO not empty, "
3002 "cnt %d\n", wait_cnt);
3003 }
3004 }
3005 }
3006 }
Linux with added FPC-III support