1 /*******************************************************************
2  * This file is part of the Emulex Linux Device Driver for         *
3  * Fibre Channel Host Bus Adapters.                                *
4  * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
7  * EMULEX and SLI are trademarks of Emulex.                        *
8  * www.broadcom.com                                                *
9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
10  *                                                                 *
11  * This program is free software; you can redistribute it and/or   *
12  * modify it under the terms of version 2 of the GNU General       *
13  * Public License as published by the Free Software Foundation.    *
14  * This program is distributed in the hope that it will be useful. *
15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
20  * more details, a copy of which can be found in the file COPYING  *
21  * included with this package.                                     *
22  ********************************************************************/
23 #include <linux/pci.h>
24 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26 #include <linux/delay.h>
27 #include <asm/unaligned.h>
28 #include <linux/crc-t10dif.h>
29 #include <net/checksum.h>
30 
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_eh.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <scsi/fc/fc_fs.h>
38 
39 #include "lpfc_version.h"
40 #include "lpfc_hw4.h"
41 #include "lpfc_hw.h"
42 #include "lpfc_sli.h"
43 #include "lpfc_sli4.h"
44 #include "lpfc_nl.h"
45 #include "lpfc_disc.h"
46 #include "lpfc.h"
47 #include "lpfc_scsi.h"
48 #include "lpfc_nvme.h"
49 #include "lpfc_logmsg.h"
50 #include "lpfc_crtn.h"
51 #include "lpfc_vport.h"
52 #include "lpfc_debugfs.h"
53 
54 static struct lpfc_iocbq *lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *,
55 						 struct lpfc_async_xchg_ctx *,
56 						 dma_addr_t rspbuf,
57 						 uint16_t rspsize);
58 static struct lpfc_iocbq *lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *,
59 						  struct lpfc_async_xchg_ctx *);
60 static int lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *,
61 					  struct lpfc_async_xchg_ctx *,
62 					  uint32_t, uint16_t);
63 static int lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *,
64 					    struct lpfc_async_xchg_ctx *,
65 					    uint32_t, uint16_t);
66 static void lpfc_nvmet_wqfull_flush(struct lpfc_hba *, struct lpfc_queue *,
67 				    struct lpfc_async_xchg_ctx *);
68 static void lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *);
69 
70 static void lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf);
71 
72 static union lpfc_wqe128 lpfc_tsend_cmd_template;
73 static union lpfc_wqe128 lpfc_treceive_cmd_template;
74 static union lpfc_wqe128 lpfc_trsp_cmd_template;
75 
76 /* Setup WQE templates for NVME IOs */
77 void
lpfc_nvmet_cmd_template(void)78 lpfc_nvmet_cmd_template(void)
79 {
80 	union lpfc_wqe128 *wqe;
81 
82 	/* TSEND template */
83 	wqe = &lpfc_tsend_cmd_template;
84 	memset(wqe, 0, sizeof(union lpfc_wqe128));
85 
86 	/* Word 0, 1, 2 - BDE is variable */
87 
88 	/* Word 3 - payload_offset_len is zero */
89 
90 	/* Word 4 - relative_offset is variable */
91 
92 	/* Word 5 - is zero */
93 
94 	/* Word 6 - ctxt_tag, xri_tag is variable */
95 
96 	/* Word 7 - wqe_ar is variable */
97 	bf_set(wqe_cmnd, &wqe->fcp_tsend.wqe_com, CMD_FCP_TSEND64_WQE);
98 	bf_set(wqe_pu, &wqe->fcp_tsend.wqe_com, PARM_REL_OFF);
99 	bf_set(wqe_class, &wqe->fcp_tsend.wqe_com, CLASS3);
100 	bf_set(wqe_ct, &wqe->fcp_tsend.wqe_com, SLI4_CT_RPI);
101 	bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 1);
102 
103 	/* Word 8 - abort_tag is variable */
104 
105 	/* Word 9  - reqtag, rcvoxid is variable */
106 
107 	/* Word 10 - wqes, xc is variable */
108 	bf_set(wqe_xchg, &wqe->fcp_tsend.wqe_com, LPFC_NVME_XCHG);
109 	bf_set(wqe_dbde, &wqe->fcp_tsend.wqe_com, 1);
110 	bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
111 	bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
112 	bf_set(wqe_iod, &wqe->fcp_tsend.wqe_com, LPFC_WQE_IOD_WRITE);
113 	bf_set(wqe_lenloc, &wqe->fcp_tsend.wqe_com, LPFC_WQE_LENLOC_WORD12);
114 
115 	/* Word 11 - sup, irsp, irsplen is variable */
116 	bf_set(wqe_cmd_type, &wqe->fcp_tsend.wqe_com, FCP_COMMAND_TSEND);
117 	bf_set(wqe_cqid, &wqe->fcp_tsend.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
118 	bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
119 	bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
120 	bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
121 	bf_set(wqe_pbde, &wqe->fcp_tsend.wqe_com, 0);
122 
123 	/* Word 12 - fcp_data_len is variable */
124 
125 	/* Word 13, 14, 15 - PBDE is zero */
126 
127 	/* TRECEIVE template */
128 	wqe = &lpfc_treceive_cmd_template;
129 	memset(wqe, 0, sizeof(union lpfc_wqe128));
130 
131 	/* Word 0, 1, 2 - BDE is variable */
132 
133 	/* Word 3 */
134 	wqe->fcp_treceive.payload_offset_len = TXRDY_PAYLOAD_LEN;
135 
136 	/* Word 4 - relative_offset is variable */
137 
138 	/* Word 5 - is zero */
139 
140 	/* Word 6 - ctxt_tag, xri_tag is variable */
141 
142 	/* Word 7 */
143 	bf_set(wqe_cmnd, &wqe->fcp_treceive.wqe_com, CMD_FCP_TRECEIVE64_WQE);
144 	bf_set(wqe_pu, &wqe->fcp_treceive.wqe_com, PARM_REL_OFF);
145 	bf_set(wqe_class, &wqe->fcp_treceive.wqe_com, CLASS3);
146 	bf_set(wqe_ct, &wqe->fcp_treceive.wqe_com, SLI4_CT_RPI);
147 	bf_set(wqe_ar, &wqe->fcp_treceive.wqe_com, 0);
148 
149 	/* Word 8 - abort_tag is variable */
150 
151 	/* Word 9  - reqtag, rcvoxid is variable */
152 
153 	/* Word 10 - xc is variable */
154 	bf_set(wqe_dbde, &wqe->fcp_treceive.wqe_com, 1);
155 	bf_set(wqe_wqes, &wqe->fcp_treceive.wqe_com, 0);
156 	bf_set(wqe_xchg, &wqe->fcp_treceive.wqe_com, LPFC_NVME_XCHG);
157 	bf_set(wqe_iod, &wqe->fcp_treceive.wqe_com, LPFC_WQE_IOD_READ);
158 	bf_set(wqe_lenloc, &wqe->fcp_treceive.wqe_com, LPFC_WQE_LENLOC_WORD12);
159 	bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
160 
161 	/* Word 11 - pbde is variable */
162 	bf_set(wqe_cmd_type, &wqe->fcp_treceive.wqe_com, FCP_COMMAND_TRECEIVE);
163 	bf_set(wqe_cqid, &wqe->fcp_treceive.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
164 	bf_set(wqe_sup, &wqe->fcp_treceive.wqe_com, 0);
165 	bf_set(wqe_irsp, &wqe->fcp_treceive.wqe_com, 0);
166 	bf_set(wqe_irsplen, &wqe->fcp_treceive.wqe_com, 0);
167 	bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 1);
168 
169 	/* Word 12 - fcp_data_len is variable */
170 
171 	/* Word 13, 14, 15 - PBDE is variable */
172 
173 	/* TRSP template */
174 	wqe = &lpfc_trsp_cmd_template;
175 	memset(wqe, 0, sizeof(union lpfc_wqe128));
176 
177 	/* Word 0, 1, 2 - BDE is variable */
178 
179 	/* Word 3 - response_len is variable */
180 
181 	/* Word 4, 5 - is zero */
182 
183 	/* Word 6 - ctxt_tag, xri_tag is variable */
184 
185 	/* Word 7 */
186 	bf_set(wqe_cmnd, &wqe->fcp_trsp.wqe_com, CMD_FCP_TRSP64_WQE);
187 	bf_set(wqe_pu, &wqe->fcp_trsp.wqe_com, PARM_UNUSED);
188 	bf_set(wqe_class, &wqe->fcp_trsp.wqe_com, CLASS3);
189 	bf_set(wqe_ct, &wqe->fcp_trsp.wqe_com, SLI4_CT_RPI);
190 	bf_set(wqe_ag, &wqe->fcp_trsp.wqe_com, 1); /* wqe_ar */
191 
192 	/* Word 8 - abort_tag is variable */
193 
194 	/* Word 9  - reqtag is variable */
195 
196 	/* Word 10 wqes, xc is variable */
197 	bf_set(wqe_dbde, &wqe->fcp_trsp.wqe_com, 1);
198 	bf_set(wqe_xchg, &wqe->fcp_trsp.wqe_com, LPFC_NVME_XCHG);
199 	bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 0);
200 	bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 0);
201 	bf_set(wqe_iod, &wqe->fcp_trsp.wqe_com, LPFC_WQE_IOD_NONE);
202 	bf_set(wqe_lenloc, &wqe->fcp_trsp.wqe_com, LPFC_WQE_LENLOC_WORD3);
203 
204 	/* Word 11 irsp, irsplen is variable */
205 	bf_set(wqe_cmd_type, &wqe->fcp_trsp.wqe_com, FCP_COMMAND_TRSP);
206 	bf_set(wqe_cqid, &wqe->fcp_trsp.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
207 	bf_set(wqe_sup, &wqe->fcp_trsp.wqe_com, 0);
208 	bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 0);
209 	bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com, 0);
210 	bf_set(wqe_pbde, &wqe->fcp_trsp.wqe_com, 0);
211 
212 	/* Word 12, 13, 14, 15 - is zero */
213 }
214 
215 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
216 static struct lpfc_async_xchg_ctx *
lpfc_nvmet_get_ctx_for_xri(struct lpfc_hba * phba,u16 xri)217 lpfc_nvmet_get_ctx_for_xri(struct lpfc_hba *phba, u16 xri)
218 {
219 	struct lpfc_async_xchg_ctx *ctxp;
220 	unsigned long iflag;
221 	bool found = false;
222 
223 	spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
224 	list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
225 		if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
226 			continue;
227 
228 		found = true;
229 		break;
230 	}
231 	spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
232 	if (found)
233 		return ctxp;
234 
235 	return NULL;
236 }
237 
238 static struct lpfc_async_xchg_ctx *
lpfc_nvmet_get_ctx_for_oxid(struct lpfc_hba * phba,u16 oxid,u32 sid)239 lpfc_nvmet_get_ctx_for_oxid(struct lpfc_hba *phba, u16 oxid, u32 sid)
240 {
241 	struct lpfc_async_xchg_ctx *ctxp;
242 	unsigned long iflag;
243 	bool found = false;
244 
245 	spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
246 	list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
247 		if (ctxp->oxid != oxid || ctxp->sid != sid)
248 			continue;
249 
250 		found = true;
251 		break;
252 	}
253 	spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
254 	if (found)
255 		return ctxp;
256 
257 	return NULL;
258 }
259 #endif
260 
261 static void
lpfc_nvmet_defer_release(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp)262 lpfc_nvmet_defer_release(struct lpfc_hba *phba,
263 			struct lpfc_async_xchg_ctx *ctxp)
264 {
265 	lockdep_assert_held(&ctxp->ctxlock);
266 
267 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
268 			"6313 NVMET Defer ctx release oxid x%x flg x%x\n",
269 			ctxp->oxid, ctxp->flag);
270 
271 	if (ctxp->flag & LPFC_NVME_CTX_RLS)
272 		return;
273 
274 	ctxp->flag |= LPFC_NVME_CTX_RLS;
275 	spin_lock(&phba->sli4_hba.t_active_list_lock);
276 	list_del(&ctxp->list);
277 	spin_unlock(&phba->sli4_hba.t_active_list_lock);
278 	spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
279 	list_add_tail(&ctxp->list, &phba->sli4_hba.lpfc_abts_nvmet_ctx_list);
280 	spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
281 }
282 
283 /**
284  * __lpfc_nvme_xmt_ls_rsp_cmp - Generic completion handler for the
285  *         transmission of an NVME LS response.
286  * @phba: Pointer to HBA context object.
287  * @cmdwqe: Pointer to driver command WQE object.
288  * @rspwqe: Pointer to driver response WQE object.
289  *
290  * The function is called from SLI ring event handler with no
291  * lock held. The function frees memory resources used for the command
292  * used to send the NVME LS RSP.
293  **/
294 void
__lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)295 __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
296 			   struct lpfc_iocbq *rspwqe)
297 {
298 	struct lpfc_async_xchg_ctx *axchg = cmdwqe->context_un.axchg;
299 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
300 	struct nvmefc_ls_rsp *ls_rsp = &axchg->ls_rsp;
301 	uint32_t status, result;
302 
303 	status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
304 	result = wcqe->parameter;
305 
306 	if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
307 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
308 				"6410 NVMEx LS cmpl state mismatch IO x%x: "
309 				"%d %d\n",
310 				axchg->oxid, axchg->state, axchg->entry_cnt);
311 	}
312 
313 	lpfc_nvmeio_data(phba, "NVMEx LS  CMPL: xri x%x stat x%x result x%x\n",
314 			 axchg->oxid, status, result);
315 
316 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
317 			"6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
318 			status, result, axchg->oxid);
319 
320 	lpfc_nlp_put(cmdwqe->ndlp);
321 	cmdwqe->context_un.axchg = NULL;
322 	cmdwqe->bpl_dmabuf = NULL;
323 	lpfc_sli_release_iocbq(phba, cmdwqe);
324 	ls_rsp->done(ls_rsp);
325 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
326 			"6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
327 			status, axchg->oxid);
328 	kfree(axchg);
329 }
330 
331 /**
332  * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
333  * @phba: Pointer to HBA context object.
334  * @cmdwqe: Pointer to driver command WQE object.
335  * @rspwqe: Pointer to driver response WQE object.
336  *
337  * The function is called from SLI ring event handler with no
338  * lock held. This function is the completion handler for NVME LS commands
339  * The function updates any states and statistics, then calls the
340  * generic completion handler to free resources.
341  **/
342 static void
lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)343 lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
344 			  struct lpfc_iocbq *rspwqe)
345 {
346 	struct lpfc_nvmet_tgtport *tgtp;
347 	uint32_t status, result;
348 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
349 
350 	if (!phba->targetport)
351 		goto finish;
352 
353 	status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
354 	result = wcqe->parameter;
355 
356 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
357 	if (tgtp) {
358 		if (status) {
359 			atomic_inc(&tgtp->xmt_ls_rsp_error);
360 			if (result == IOERR_ABORT_REQUESTED)
361 				atomic_inc(&tgtp->xmt_ls_rsp_aborted);
362 			if (bf_get(lpfc_wcqe_c_xb, wcqe))
363 				atomic_inc(&tgtp->xmt_ls_rsp_xb_set);
364 		} else {
365 			atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
366 		}
367 	}
368 
369 finish:
370 	__lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, rspwqe);
371 }
372 
373 /**
374  * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
375  * @phba: HBA buffer is associated with
376  * @ctx_buf: ctx buffer context
377  *
378  * Description: Frees the given DMA buffer in the appropriate way given by
379  * reposting it to its associated RQ so it can be reused.
380  *
381  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
382  *
383  * Returns: None
384  **/
385 void
lpfc_nvmet_ctxbuf_post(struct lpfc_hba * phba,struct lpfc_nvmet_ctxbuf * ctx_buf)386 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
387 {
388 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
389 	struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
390 	struct lpfc_nvmet_tgtport *tgtp;
391 	struct fc_frame_header *fc_hdr;
392 	struct rqb_dmabuf *nvmebuf;
393 	struct lpfc_nvmet_ctx_info *infop;
394 	uint32_t size, oxid, sid;
395 	int cpu;
396 	unsigned long iflag;
397 
398 	if (ctxp->state == LPFC_NVME_STE_FREE) {
399 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
400 				"6411 NVMET free, already free IO x%x: %d %d\n",
401 				ctxp->oxid, ctxp->state, ctxp->entry_cnt);
402 	}
403 
404 	if (ctxp->rqb_buffer) {
405 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
406 		nvmebuf = ctxp->rqb_buffer;
407 		/* check if freed in another path whilst acquiring lock */
408 		if (nvmebuf) {
409 			ctxp->rqb_buffer = NULL;
410 			if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
411 				ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
412 				spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
413 				nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
414 								    nvmebuf);
415 			} else {
416 				spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
417 				/* repost */
418 				lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
419 			}
420 		} else {
421 			spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
422 		}
423 	}
424 	ctxp->state = LPFC_NVME_STE_FREE;
425 
426 	spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
427 	if (phba->sli4_hba.nvmet_io_wait_cnt) {
428 		list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
429 				 nvmebuf, struct rqb_dmabuf,
430 				 hbuf.list);
431 		phba->sli4_hba.nvmet_io_wait_cnt--;
432 		spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
433 				       iflag);
434 
435 		fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
436 		oxid = be16_to_cpu(fc_hdr->fh_ox_id);
437 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
438 		size = nvmebuf->bytes_recv;
439 		sid = sli4_sid_from_fc_hdr(fc_hdr);
440 
441 		ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
442 		ctxp->wqeq = NULL;
443 		ctxp->offset = 0;
444 		ctxp->phba = phba;
445 		ctxp->size = size;
446 		ctxp->oxid = oxid;
447 		ctxp->sid = sid;
448 		ctxp->state = LPFC_NVME_STE_RCV;
449 		ctxp->entry_cnt = 1;
450 		ctxp->flag = 0;
451 		ctxp->ctxbuf = ctx_buf;
452 		ctxp->rqb_buffer = (void *)nvmebuf;
453 		spin_lock_init(&ctxp->ctxlock);
454 
455 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
456 		/* NOTE: isr time stamp is stale when context is re-assigned*/
457 		if (ctxp->ts_isr_cmd) {
458 			ctxp->ts_cmd_nvme = 0;
459 			ctxp->ts_nvme_data = 0;
460 			ctxp->ts_data_wqput = 0;
461 			ctxp->ts_isr_data = 0;
462 			ctxp->ts_data_nvme = 0;
463 			ctxp->ts_nvme_status = 0;
464 			ctxp->ts_status_wqput = 0;
465 			ctxp->ts_isr_status = 0;
466 			ctxp->ts_status_nvme = 0;
467 		}
468 #endif
469 		atomic_inc(&tgtp->rcv_fcp_cmd_in);
470 
471 		/* Indicate that a replacement buffer has been posted */
472 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
473 		ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
474 		spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
475 
476 		if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
477 			atomic_inc(&tgtp->rcv_fcp_cmd_drop);
478 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
479 					"6181 Unable to queue deferred work "
480 					"for oxid x%x. "
481 					"FCP Drop IO [x%x x%x x%x]\n",
482 					ctxp->oxid,
483 					atomic_read(&tgtp->rcv_fcp_cmd_in),
484 					atomic_read(&tgtp->rcv_fcp_cmd_out),
485 					atomic_read(&tgtp->xmt_fcp_release));
486 
487 			spin_lock_irqsave(&ctxp->ctxlock, iflag);
488 			lpfc_nvmet_defer_release(phba, ctxp);
489 			spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
490 			lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
491 		}
492 		return;
493 	}
494 	spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
495 
496 	/*
497 	 * Use the CPU context list, from the MRQ the IO was received on
498 	 * (ctxp->idx), to save context structure.
499 	 */
500 	spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
501 	list_del_init(&ctxp->list);
502 	spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
503 	cpu = raw_smp_processor_id();
504 	infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
505 	spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
506 	list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
507 	infop->nvmet_ctx_list_cnt++;
508 	spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
509 #endif
510 }
511 
512 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
513 static void
lpfc_nvmet_ktime(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp)514 lpfc_nvmet_ktime(struct lpfc_hba *phba,
515 		 struct lpfc_async_xchg_ctx *ctxp)
516 {
517 	uint64_t seg1, seg2, seg3, seg4, seg5;
518 	uint64_t seg6, seg7, seg8, seg9, seg10;
519 	uint64_t segsum;
520 
521 	if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
522 	    !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
523 	    !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
524 	    !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
525 	    !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
526 		return;
527 
528 	if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
529 		return;
530 	if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
531 		return;
532 	if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
533 		return;
534 	if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
535 		return;
536 	if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
537 		return;
538 	if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
539 		return;
540 	if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
541 		return;
542 	if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
543 		return;
544 	if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
545 		return;
546 	if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
547 		return;
548 	/*
549 	 * Segment 1 - Time from FCP command received by MSI-X ISR
550 	 * to FCP command is passed to NVME Layer.
551 	 * Segment 2 - Time from FCP command payload handed
552 	 * off to NVME Layer to Driver receives a Command op
553 	 * from NVME Layer.
554 	 * Segment 3 - Time from Driver receives a Command op
555 	 * from NVME Layer to Command is put on WQ.
556 	 * Segment 4 - Time from Driver WQ put is done
557 	 * to MSI-X ISR for Command cmpl.
558 	 * Segment 5 - Time from MSI-X ISR for Command cmpl to
559 	 * Command cmpl is passed to NVME Layer.
560 	 * Segment 6 - Time from Command cmpl is passed to NVME
561 	 * Layer to Driver receives a RSP op from NVME Layer.
562 	 * Segment 7 - Time from Driver receives a RSP op from
563 	 * NVME Layer to WQ put is done on TRSP FCP Status.
564 	 * Segment 8 - Time from Driver WQ put is done on TRSP
565 	 * FCP Status to MSI-X ISR for TRSP cmpl.
566 	 * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
567 	 * TRSP cmpl is passed to NVME Layer.
568 	 * Segment 10 - Time from FCP command received by
569 	 * MSI-X ISR to command is completed on wire.
570 	 * (Segments 1 thru 8) for READDATA / WRITEDATA
571 	 * (Segments 1 thru 4) for READDATA_RSP
572 	 */
573 	seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
574 	segsum = seg1;
575 
576 	seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
577 	if (segsum > seg2)
578 		return;
579 	seg2 -= segsum;
580 	segsum += seg2;
581 
582 	seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
583 	if (segsum > seg3)
584 		return;
585 	seg3 -= segsum;
586 	segsum += seg3;
587 
588 	seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
589 	if (segsum > seg4)
590 		return;
591 	seg4 -= segsum;
592 	segsum += seg4;
593 
594 	seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
595 	if (segsum > seg5)
596 		return;
597 	seg5 -= segsum;
598 	segsum += seg5;
599 
600 
601 	/* For auto rsp commands seg6 thru seg10 will be 0 */
602 	if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
603 		seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
604 		if (segsum > seg6)
605 			return;
606 		seg6 -= segsum;
607 		segsum += seg6;
608 
609 		seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
610 		if (segsum > seg7)
611 			return;
612 		seg7 -= segsum;
613 		segsum += seg7;
614 
615 		seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
616 		if (segsum > seg8)
617 			return;
618 		seg8 -= segsum;
619 		segsum += seg8;
620 
621 		seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
622 		if (segsum > seg9)
623 			return;
624 		seg9 -= segsum;
625 		segsum += seg9;
626 
627 		if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
628 			return;
629 		seg10 = (ctxp->ts_isr_status -
630 			ctxp->ts_isr_cmd);
631 	} else {
632 		if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
633 			return;
634 		seg6 =  0;
635 		seg7 =  0;
636 		seg8 =  0;
637 		seg9 =  0;
638 		seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
639 	}
640 
641 	phba->ktime_seg1_total += seg1;
642 	if (seg1 < phba->ktime_seg1_min)
643 		phba->ktime_seg1_min = seg1;
644 	else if (seg1 > phba->ktime_seg1_max)
645 		phba->ktime_seg1_max = seg1;
646 
647 	phba->ktime_seg2_total += seg2;
648 	if (seg2 < phba->ktime_seg2_min)
649 		phba->ktime_seg2_min = seg2;
650 	else if (seg2 > phba->ktime_seg2_max)
651 		phba->ktime_seg2_max = seg2;
652 
653 	phba->ktime_seg3_total += seg3;
654 	if (seg3 < phba->ktime_seg3_min)
655 		phba->ktime_seg3_min = seg3;
656 	else if (seg3 > phba->ktime_seg3_max)
657 		phba->ktime_seg3_max = seg3;
658 
659 	phba->ktime_seg4_total += seg4;
660 	if (seg4 < phba->ktime_seg4_min)
661 		phba->ktime_seg4_min = seg4;
662 	else if (seg4 > phba->ktime_seg4_max)
663 		phba->ktime_seg4_max = seg4;
664 
665 	phba->ktime_seg5_total += seg5;
666 	if (seg5 < phba->ktime_seg5_min)
667 		phba->ktime_seg5_min = seg5;
668 	else if (seg5 > phba->ktime_seg5_max)
669 		phba->ktime_seg5_max = seg5;
670 
671 	phba->ktime_data_samples++;
672 	if (!seg6)
673 		goto out;
674 
675 	phba->ktime_seg6_total += seg6;
676 	if (seg6 < phba->ktime_seg6_min)
677 		phba->ktime_seg6_min = seg6;
678 	else if (seg6 > phba->ktime_seg6_max)
679 		phba->ktime_seg6_max = seg6;
680 
681 	phba->ktime_seg7_total += seg7;
682 	if (seg7 < phba->ktime_seg7_min)
683 		phba->ktime_seg7_min = seg7;
684 	else if (seg7 > phba->ktime_seg7_max)
685 		phba->ktime_seg7_max = seg7;
686 
687 	phba->ktime_seg8_total += seg8;
688 	if (seg8 < phba->ktime_seg8_min)
689 		phba->ktime_seg8_min = seg8;
690 	else if (seg8 > phba->ktime_seg8_max)
691 		phba->ktime_seg8_max = seg8;
692 
693 	phba->ktime_seg9_total += seg9;
694 	if (seg9 < phba->ktime_seg9_min)
695 		phba->ktime_seg9_min = seg9;
696 	else if (seg9 > phba->ktime_seg9_max)
697 		phba->ktime_seg9_max = seg9;
698 out:
699 	phba->ktime_seg10_total += seg10;
700 	if (seg10 < phba->ktime_seg10_min)
701 		phba->ktime_seg10_min = seg10;
702 	else if (seg10 > phba->ktime_seg10_max)
703 		phba->ktime_seg10_max = seg10;
704 	phba->ktime_status_samples++;
705 }
706 #endif
707 
708 /**
709  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
710  * @phba: Pointer to HBA context object.
711  * @cmdwqe: Pointer to driver command WQE object.
712  * @rspwqe: Pointer to driver response WQE object.
713  *
714  * The function is called from SLI ring event handler with no
715  * lock held. This function is the completion handler for NVME FCP commands
716  * The function frees memory resources used for the NVME commands.
717  **/
718 static void
lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)719 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
720 			  struct lpfc_iocbq *rspwqe)
721 {
722 	struct lpfc_nvmet_tgtport *tgtp;
723 	struct nvmefc_tgt_fcp_req *rsp;
724 	struct lpfc_async_xchg_ctx *ctxp;
725 	uint32_t status, result, op, logerr;
726 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
727 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
728 	int id;
729 #endif
730 
731 	ctxp = cmdwqe->context_un.axchg;
732 	ctxp->flag &= ~LPFC_NVME_IO_INP;
733 
734 	rsp = &ctxp->hdlrctx.fcp_req;
735 	op = rsp->op;
736 
737 	status = bf_get(lpfc_wcqe_c_status, wcqe);
738 	result = wcqe->parameter;
739 
740 	if (phba->targetport)
741 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
742 	else
743 		tgtp = NULL;
744 
745 	lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
746 			 ctxp->oxid, op, status);
747 
748 	if (status) {
749 		rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
750 		rsp->transferred_length = 0;
751 		if (tgtp) {
752 			atomic_inc(&tgtp->xmt_fcp_rsp_error);
753 			if (result == IOERR_ABORT_REQUESTED)
754 				atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
755 		}
756 
757 		logerr = LOG_NVME_IOERR;
758 
759 		/* pick up SLI4 exhange busy condition */
760 		if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
761 			ctxp->flag |= LPFC_NVME_XBUSY;
762 			logerr |= LOG_NVME_ABTS;
763 			if (tgtp)
764 				atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
765 
766 		} else {
767 			ctxp->flag &= ~LPFC_NVME_XBUSY;
768 		}
769 
770 		lpfc_printf_log(phba, KERN_INFO, logerr,
771 				"6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
772 				"XBUSY:x%x\n",
773 				ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
774 				status, result, ctxp->flag);
775 
776 	} else {
777 		rsp->fcp_error = NVME_SC_SUCCESS;
778 		if (op == NVMET_FCOP_RSP)
779 			rsp->transferred_length = rsp->rsplen;
780 		else
781 			rsp->transferred_length = rsp->transfer_length;
782 		if (tgtp)
783 			atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
784 	}
785 
786 	if ((op == NVMET_FCOP_READDATA_RSP) ||
787 	    (op == NVMET_FCOP_RSP)) {
788 		/* Sanity check */
789 		ctxp->state = LPFC_NVME_STE_DONE;
790 		ctxp->entry_cnt++;
791 
792 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
793 		if (ctxp->ts_cmd_nvme) {
794 			if (rsp->op == NVMET_FCOP_READDATA_RSP) {
795 				ctxp->ts_isr_data =
796 					cmdwqe->isr_timestamp;
797 				ctxp->ts_data_nvme =
798 					ktime_get_ns();
799 				ctxp->ts_nvme_status =
800 					ctxp->ts_data_nvme;
801 				ctxp->ts_status_wqput =
802 					ctxp->ts_data_nvme;
803 				ctxp->ts_isr_status =
804 					ctxp->ts_data_nvme;
805 				ctxp->ts_status_nvme =
806 					ctxp->ts_data_nvme;
807 			} else {
808 				ctxp->ts_isr_status =
809 					cmdwqe->isr_timestamp;
810 				ctxp->ts_status_nvme =
811 					ktime_get_ns();
812 			}
813 		}
814 #endif
815 		rsp->done(rsp);
816 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
817 		if (ctxp->ts_cmd_nvme)
818 			lpfc_nvmet_ktime(phba, ctxp);
819 #endif
820 		/* lpfc_nvmet_xmt_fcp_release() will recycle the context */
821 	} else {
822 		ctxp->entry_cnt++;
823 		memset_startat(cmdwqe, 0, cmd_flag);
824 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
825 		if (ctxp->ts_cmd_nvme) {
826 			ctxp->ts_isr_data = cmdwqe->isr_timestamp;
827 			ctxp->ts_data_nvme = ktime_get_ns();
828 		}
829 #endif
830 		rsp->done(rsp);
831 	}
832 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
833 	if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
834 		id = raw_smp_processor_id();
835 		this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
836 		if (ctxp->cpu != id)
837 			lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
838 					"6704 CPU Check cmdcmpl: "
839 					"cpu %d expect %d\n",
840 					id, ctxp->cpu);
841 	}
842 #endif
843 }
844 
845 /**
846  * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
847  *         an NVME LS rsp for a prior NVME LS request that was received.
848  * @axchg: pointer to exchange context for the NVME LS request the response
849  *         is for.
850  * @ls_rsp: pointer to the transport LS RSP that is to be sent
851  * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
852  *
853  * This routine is used to format and send a WQE to transmit a NVME LS
854  * Response.  The response is for a prior NVME LS request that was
855  * received and posted to the transport.
856  *
857  * Returns:
858  *  0 : if response successfully transmit
859  *  non-zero : if response failed to transmit, of the form -Exxx.
860  **/
861 int
__lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx * axchg,struct nvmefc_ls_rsp * ls_rsp,void (* xmt_ls_rsp_cmp)(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe))862 __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
863 			struct nvmefc_ls_rsp *ls_rsp,
864 			void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
865 				struct lpfc_iocbq *cmdwqe,
866 				struct lpfc_iocbq *rspwqe))
867 {
868 	struct lpfc_hba *phba = axchg->phba;
869 	struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
870 	struct lpfc_iocbq *nvmewqeq;
871 	struct lpfc_dmabuf dmabuf;
872 	struct ulp_bde64 bpl;
873 	int rc;
874 
875 	if (phba->pport->load_flag & FC_UNLOADING)
876 		return -ENODEV;
877 
878 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
879 			"6023 NVMEx LS rsp oxid x%x\n", axchg->oxid);
880 
881 	if (axchg->state != LPFC_NVME_STE_LS_RCV || axchg->entry_cnt != 1) {
882 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
883 				"6412 NVMEx LS rsp state mismatch "
884 				"oxid x%x: %d %d\n",
885 				axchg->oxid, axchg->state, axchg->entry_cnt);
886 		return -EALREADY;
887 	}
888 	axchg->state = LPFC_NVME_STE_LS_RSP;
889 	axchg->entry_cnt++;
890 
891 	nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, axchg, ls_rsp->rspdma,
892 					 ls_rsp->rsplen);
893 	if (nvmewqeq == NULL) {
894 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
895 				"6150 NVMEx LS Drop Rsp x%x: Prep\n",
896 				axchg->oxid);
897 		rc = -ENOMEM;
898 		goto out_free_buf;
899 	}
900 
901 	/* Save numBdes for bpl2sgl */
902 	nvmewqeq->num_bdes = 1;
903 	nvmewqeq->hba_wqidx = 0;
904 	nvmewqeq->bpl_dmabuf = &dmabuf;
905 	dmabuf.virt = &bpl;
906 	bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
907 	bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
908 	bpl.tus.f.bdeSize = ls_rsp->rsplen;
909 	bpl.tus.f.bdeFlags = 0;
910 	bpl.tus.w = le32_to_cpu(bpl.tus.w);
911 	/*
912 	 * Note: although we're using stack space for the dmabuf, the
913 	 * call to lpfc_sli4_issue_wqe is synchronous, so it will not
914 	 * be referenced after it returns back to this routine.
915 	 */
916 
917 	nvmewqeq->cmd_cmpl = xmt_ls_rsp_cmp;
918 	nvmewqeq->context_un.axchg = axchg;
919 
920 	lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
921 			 axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
922 
923 	rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
924 
925 	/* clear to be sure there's no reference */
926 	nvmewqeq->bpl_dmabuf = NULL;
927 
928 	if (rc == WQE_SUCCESS) {
929 		/*
930 		 * Okay to repost buffer here, but wait till cmpl
931 		 * before freeing ctxp and iocbq.
932 		 */
933 		lpfc_in_buf_free(phba, &nvmebuf->dbuf);
934 		return 0;
935 	}
936 
937 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
938 			"6151 NVMEx LS RSP x%x: failed to transmit %d\n",
939 			axchg->oxid, rc);
940 
941 	rc = -ENXIO;
942 
943 	lpfc_nlp_put(nvmewqeq->ndlp);
944 
945 out_free_buf:
946 	/* Give back resources */
947 	lpfc_in_buf_free(phba, &nvmebuf->dbuf);
948 
949 	/*
950 	 * As transport doesn't track completions of responses, if the rsp
951 	 * fails to send, the transport will effectively ignore the rsp
952 	 * and consider the LS done. However, the driver has an active
953 	 * exchange open for the LS - so be sure to abort the exchange
954 	 * if the response isn't sent.
955 	 */
956 	lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
957 	return rc;
958 }
959 
960 /**
961  * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
962  * @tgtport: pointer to target port that NVME LS is to be transmit from.
963  * @ls_rsp: pointer to the transport LS RSP that is to be sent
964  *
965  * Driver registers this routine to transmit responses for received NVME
966  * LS requests.
967  *
968  * This routine is used to format and send a WQE to transmit a NVME LS
969  * Response. The ls_rsp is used to reverse-map the LS to the original
970  * NVME LS request sequence, which provides addressing information for
971  * the remote port the LS to be sent to, as well as the exchange id
972  * that is the LS is bound to.
973  *
974  * Returns:
975  *  0 : if response successfully transmit
976  *  non-zero : if response failed to transmit, of the form -Exxx.
977  **/
978 static int
lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port * tgtport,struct nvmefc_ls_rsp * ls_rsp)979 lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
980 		      struct nvmefc_ls_rsp *ls_rsp)
981 {
982 	struct lpfc_async_xchg_ctx *axchg =
983 		container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
984 	struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
985 	int rc;
986 
987 	if (axchg->phba->pport->load_flag & FC_UNLOADING)
988 		return -ENODEV;
989 
990 	rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
991 
992 	if (rc) {
993 		atomic_inc(&nvmep->xmt_ls_drop);
994 		/*
995 		 * unless the failure is due to having already sent
996 		 * the response, an abort will be generated for the
997 		 * exchange if the rsp can't be sent.
998 		 */
999 		if (rc != -EALREADY)
1000 			atomic_inc(&nvmep->xmt_ls_abort);
1001 		return rc;
1002 	}
1003 
1004 	atomic_inc(&nvmep->xmt_ls_rsp);
1005 	return 0;
1006 }
1007 
1008 static int
lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port * tgtport,struct nvmefc_tgt_fcp_req * rsp)1009 lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
1010 		      struct nvmefc_tgt_fcp_req *rsp)
1011 {
1012 	struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1013 	struct lpfc_async_xchg_ctx *ctxp =
1014 		container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1015 	struct lpfc_hba *phba = ctxp->phba;
1016 	struct lpfc_queue *wq;
1017 	struct lpfc_iocbq *nvmewqeq;
1018 	struct lpfc_sli_ring *pring;
1019 	unsigned long iflags;
1020 	int rc;
1021 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1022 	int id;
1023 #endif
1024 
1025 	if (phba->pport->load_flag & FC_UNLOADING) {
1026 		rc = -ENODEV;
1027 		goto aerr;
1028 	}
1029 
1030 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1031 	if (ctxp->ts_cmd_nvme) {
1032 		if (rsp->op == NVMET_FCOP_RSP)
1033 			ctxp->ts_nvme_status = ktime_get_ns();
1034 		else
1035 			ctxp->ts_nvme_data = ktime_get_ns();
1036 	}
1037 
1038 	/* Setup the hdw queue if not already set */
1039 	if (!ctxp->hdwq)
1040 		ctxp->hdwq = &phba->sli4_hba.hdwq[rsp->hwqid];
1041 
1042 	if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
1043 		id = raw_smp_processor_id();
1044 		this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1045 		if (rsp->hwqid != id)
1046 			lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1047 					"6705 CPU Check OP: "
1048 					"cpu %d expect %d\n",
1049 					id, rsp->hwqid);
1050 		ctxp->cpu = id; /* Setup cpu for cmpl check */
1051 	}
1052 #endif
1053 
1054 	/* Sanity check */
1055 	if ((ctxp->flag & LPFC_NVME_ABTS_RCV) ||
1056 	    (ctxp->state == LPFC_NVME_STE_ABORT)) {
1057 		atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1058 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1059 				"6102 IO oxid x%x aborted\n",
1060 				ctxp->oxid);
1061 		rc = -ENXIO;
1062 		goto aerr;
1063 	}
1064 
1065 	nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
1066 	if (nvmewqeq == NULL) {
1067 		atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1068 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1069 				"6152 FCP Drop IO x%x: Prep\n",
1070 				ctxp->oxid);
1071 		rc = -ENXIO;
1072 		goto aerr;
1073 	}
1074 
1075 	nvmewqeq->cmd_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
1076 	nvmewqeq->context_un.axchg = ctxp;
1077 	nvmewqeq->cmd_flag |=  LPFC_IO_NVMET;
1078 	ctxp->wqeq->hba_wqidx = rsp->hwqid;
1079 
1080 	lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
1081 			 ctxp->oxid, rsp->op, rsp->rsplen);
1082 
1083 	ctxp->flag |= LPFC_NVME_IO_INP;
1084 	rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
1085 	if (rc == WQE_SUCCESS) {
1086 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1087 		if (!ctxp->ts_cmd_nvme)
1088 			return 0;
1089 		if (rsp->op == NVMET_FCOP_RSP)
1090 			ctxp->ts_status_wqput = ktime_get_ns();
1091 		else
1092 			ctxp->ts_data_wqput = ktime_get_ns();
1093 #endif
1094 		return 0;
1095 	}
1096 
1097 	if (rc == -EBUSY) {
1098 		/*
1099 		 * WQ was full, so queue nvmewqeq to be sent after
1100 		 * WQE release CQE
1101 		 */
1102 		ctxp->flag |= LPFC_NVME_DEFER_WQFULL;
1103 		wq = ctxp->hdwq->io_wq;
1104 		pring = wq->pring;
1105 		spin_lock_irqsave(&pring->ring_lock, iflags);
1106 		list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
1107 		wq->q_flag |= HBA_NVMET_WQFULL;
1108 		spin_unlock_irqrestore(&pring->ring_lock, iflags);
1109 		atomic_inc(&lpfc_nvmep->defer_wqfull);
1110 		return 0;
1111 	}
1112 
1113 	/* Give back resources */
1114 	atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1115 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1116 			"6153 FCP Drop IO x%x: Issue: %d\n",
1117 			ctxp->oxid, rc);
1118 
1119 	ctxp->wqeq->hba_wqidx = 0;
1120 	nvmewqeq->context_un.axchg = NULL;
1121 	nvmewqeq->bpl_dmabuf = NULL;
1122 	rc = -EBUSY;
1123 aerr:
1124 	return rc;
1125 }
1126 
1127 static void
lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port * targetport)1128 lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
1129 {
1130 	struct lpfc_nvmet_tgtport *tport = targetport->private;
1131 
1132 	/* release any threads waiting for the unreg to complete */
1133 	if (tport->phba->targetport)
1134 		complete(tport->tport_unreg_cmp);
1135 }
1136 
1137 static void
lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port * tgtport,struct nvmefc_tgt_fcp_req * req)1138 lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
1139 			 struct nvmefc_tgt_fcp_req *req)
1140 {
1141 	struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1142 	struct lpfc_async_xchg_ctx *ctxp =
1143 		container_of(req, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1144 	struct lpfc_hba *phba = ctxp->phba;
1145 	struct lpfc_queue *wq;
1146 	unsigned long flags;
1147 
1148 	if (phba->pport->load_flag & FC_UNLOADING)
1149 		return;
1150 
1151 	if (!ctxp->hdwq)
1152 		ctxp->hdwq = &phba->sli4_hba.hdwq[0];
1153 
1154 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1155 			"6103 NVMET Abort op: oxid x%x flg x%x ste %d\n",
1156 			ctxp->oxid, ctxp->flag, ctxp->state);
1157 
1158 	lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x flg x%x ste x%x\n",
1159 			 ctxp->oxid, ctxp->flag, ctxp->state);
1160 
1161 	atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
1162 
1163 	spin_lock_irqsave(&ctxp->ctxlock, flags);
1164 
1165 	/* Since iaab/iaar are NOT set, we need to check
1166 	 * if the firmware is in process of aborting IO
1167 	 */
1168 	if (ctxp->flag & (LPFC_NVME_XBUSY | LPFC_NVME_ABORT_OP)) {
1169 		spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1170 		return;
1171 	}
1172 	ctxp->flag |= LPFC_NVME_ABORT_OP;
1173 
1174 	if (ctxp->flag & LPFC_NVME_DEFER_WQFULL) {
1175 		spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1176 		lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1177 						 ctxp->oxid);
1178 		wq = ctxp->hdwq->io_wq;
1179 		lpfc_nvmet_wqfull_flush(phba, wq, ctxp);
1180 		return;
1181 	}
1182 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1183 
1184 	/* A state of LPFC_NVME_STE_RCV means we have just received
1185 	 * the NVME command and have not started processing it.
1186 	 * (by issuing any IO WQEs on this exchange yet)
1187 	 */
1188 	if (ctxp->state == LPFC_NVME_STE_RCV)
1189 		lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1190 						 ctxp->oxid);
1191 	else
1192 		lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1193 					       ctxp->oxid);
1194 }
1195 
1196 static void
lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port * tgtport,struct nvmefc_tgt_fcp_req * rsp)1197 lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
1198 			   struct nvmefc_tgt_fcp_req *rsp)
1199 {
1200 	struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1201 	struct lpfc_async_xchg_ctx *ctxp =
1202 		container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1203 	struct lpfc_hba *phba = ctxp->phba;
1204 	unsigned long flags;
1205 	bool aborting = false;
1206 
1207 	spin_lock_irqsave(&ctxp->ctxlock, flags);
1208 	if (ctxp->flag & LPFC_NVME_XBUSY)
1209 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1210 				"6027 NVMET release with XBUSY flag x%x"
1211 				" oxid x%x\n",
1212 				ctxp->flag, ctxp->oxid);
1213 	else if (ctxp->state != LPFC_NVME_STE_DONE &&
1214 		 ctxp->state != LPFC_NVME_STE_ABORT)
1215 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1216 				"6413 NVMET release bad state %d %d oxid x%x\n",
1217 				ctxp->state, ctxp->entry_cnt, ctxp->oxid);
1218 
1219 	if ((ctxp->flag & LPFC_NVME_ABORT_OP) ||
1220 	    (ctxp->flag & LPFC_NVME_XBUSY)) {
1221 		aborting = true;
1222 		/* let the abort path do the real release */
1223 		lpfc_nvmet_defer_release(phba, ctxp);
1224 	}
1225 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1226 
1227 	lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d abt %d\n", ctxp->oxid,
1228 			 ctxp->state, aborting);
1229 
1230 	atomic_inc(&lpfc_nvmep->xmt_fcp_release);
1231 	ctxp->flag &= ~LPFC_NVME_TNOTIFY;
1232 
1233 	if (aborting)
1234 		return;
1235 
1236 	lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1237 }
1238 
1239 static void
lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port * tgtport,struct nvmefc_tgt_fcp_req * rsp)1240 lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
1241 		     struct nvmefc_tgt_fcp_req *rsp)
1242 {
1243 	struct lpfc_nvmet_tgtport *tgtp;
1244 	struct lpfc_async_xchg_ctx *ctxp =
1245 		container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1246 	struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
1247 	struct lpfc_hba *phba = ctxp->phba;
1248 	unsigned long iflag;
1249 
1250 
1251 	lpfc_nvmeio_data(phba, "NVMET DEFERRCV: xri x%x sz %d CPU %02x\n",
1252 			 ctxp->oxid, ctxp->size, raw_smp_processor_id());
1253 
1254 	if (!nvmebuf) {
1255 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1256 				"6425 Defer rcv: no buffer oxid x%x: "
1257 				"flg %x ste %x\n",
1258 				ctxp->oxid, ctxp->flag, ctxp->state);
1259 		return;
1260 	}
1261 
1262 	tgtp = phba->targetport->private;
1263 	if (tgtp)
1264 		atomic_inc(&tgtp->rcv_fcp_cmd_defer);
1265 
1266 	/* Free the nvmebuf since a new buffer already replaced it */
1267 	nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1268 	spin_lock_irqsave(&ctxp->ctxlock, iflag);
1269 	ctxp->rqb_buffer = NULL;
1270 	spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1271 }
1272 
1273 /**
1274  * lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
1275  * @phba: Pointer to HBA context object
1276  * @cmdwqe: Pointer to driver command WQE object.
1277  * @rspwqe: Pointer to driver response WQE object.
1278  *
1279  * This function is the completion handler for NVME LS requests.
1280  * The function updates any states and statistics, then calls the
1281  * generic completion handler to finish completion of the request.
1282  **/
1283 static void
lpfc_nvmet_ls_req_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)1284 lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
1285 		      struct lpfc_iocbq *rspwqe)
1286 {
1287 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
1288 	__lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
1289 }
1290 
1291 /**
1292  * lpfc_nvmet_ls_req - Issue an Link Service request
1293  * @targetport: pointer to target instance registered with nvmet transport.
1294  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1295  *               Driver sets this value to the ndlp pointer.
1296  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
1297  *
1298  * Driver registers this routine to handle any link service request
1299  * from the nvme_fc transport to a remote nvme-aware port.
1300  *
1301  * Return value :
1302  *   0 - Success
1303  *   non-zero: various error codes, in form of -Exxx
1304  **/
1305 static int
lpfc_nvmet_ls_req(struct nvmet_fc_target_port * targetport,void * hosthandle,struct nvmefc_ls_req * pnvme_lsreq)1306 lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
1307 		  void *hosthandle,
1308 		  struct nvmefc_ls_req *pnvme_lsreq)
1309 {
1310 	struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1311 	struct lpfc_hba *phba;
1312 	struct lpfc_nodelist *ndlp;
1313 	int ret;
1314 	u32 hstate;
1315 
1316 	if (!lpfc_nvmet)
1317 		return -EINVAL;
1318 
1319 	phba = lpfc_nvmet->phba;
1320 	if (phba->pport->load_flag & FC_UNLOADING)
1321 		return -EINVAL;
1322 
1323 	hstate = atomic_read(&lpfc_nvmet->state);
1324 	if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
1325 		return -EACCES;
1326 
1327 	ndlp = (struct lpfc_nodelist *)hosthandle;
1328 
1329 	ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
1330 				 lpfc_nvmet_ls_req_cmp);
1331 
1332 	return ret;
1333 }
1334 
1335 /**
1336  * lpfc_nvmet_ls_abort - Abort a prior NVME LS request
1337  * @targetport: Transport targetport, that LS was issued from.
1338  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1339  *               Driver sets this value to the ndlp pointer.
1340  * @pnvme_lsreq: the transport nvme_ls_req structure for LS to be aborted
1341  *
1342  * Driver registers this routine to abort an NVME LS request that is
1343  * in progress (from the transports perspective).
1344  **/
1345 static void
lpfc_nvmet_ls_abort(struct nvmet_fc_target_port * targetport,void * hosthandle,struct nvmefc_ls_req * pnvme_lsreq)1346 lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
1347 		    void *hosthandle,
1348 		    struct nvmefc_ls_req *pnvme_lsreq)
1349 {
1350 	struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1351 	struct lpfc_hba *phba;
1352 	struct lpfc_nodelist *ndlp;
1353 	int ret;
1354 
1355 	phba = lpfc_nvmet->phba;
1356 	if (phba->pport->load_flag & FC_UNLOADING)
1357 		return;
1358 
1359 	ndlp = (struct lpfc_nodelist *)hosthandle;
1360 
1361 	ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
1362 	if (!ret)
1363 		atomic_inc(&lpfc_nvmet->xmt_ls_abort);
1364 }
1365 
1366 static void
lpfc_nvmet_host_release(void * hosthandle)1367 lpfc_nvmet_host_release(void *hosthandle)
1368 {
1369 	struct lpfc_nodelist *ndlp = hosthandle;
1370 	struct lpfc_hba *phba = ndlp->phba;
1371 	struct lpfc_nvmet_tgtport *tgtp;
1372 
1373 	if (!phba->targetport || !phba->targetport->private)
1374 		return;
1375 
1376 	lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1377 			"6202 NVMET XPT releasing hosthandle x%px "
1378 			"DID x%x xflags x%x refcnt %d\n",
1379 			hosthandle, ndlp->nlp_DID, ndlp->fc4_xpt_flags,
1380 			kref_read(&ndlp->kref));
1381 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1382 	spin_lock_irq(&ndlp->lock);
1383 	ndlp->fc4_xpt_flags &= ~NLP_XPT_HAS_HH;
1384 	spin_unlock_irq(&ndlp->lock);
1385 	lpfc_nlp_put(ndlp);
1386 	atomic_set(&tgtp->state, 0);
1387 }
1388 
1389 static void
lpfc_nvmet_discovery_event(struct nvmet_fc_target_port * tgtport)1390 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1391 {
1392 	struct lpfc_nvmet_tgtport *tgtp;
1393 	struct lpfc_hba *phba;
1394 	uint32_t rc;
1395 
1396 	tgtp = tgtport->private;
1397 	phba = tgtp->phba;
1398 
1399 	rc = lpfc_issue_els_rscn(phba->pport, 0);
1400 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1401 			"6420 NVMET subsystem change: Notification %s\n",
1402 			(rc) ? "Failed" : "Sent");
1403 }
1404 
1405 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1406 	.targetport_delete = lpfc_nvmet_targetport_delete,
1407 	.xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1408 	.fcp_op         = lpfc_nvmet_xmt_fcp_op,
1409 	.fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1410 	.fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1411 	.defer_rcv	= lpfc_nvmet_defer_rcv,
1412 	.discovery_event = lpfc_nvmet_discovery_event,
1413 	.ls_req         = lpfc_nvmet_ls_req,
1414 	.ls_abort       = lpfc_nvmet_ls_abort,
1415 	.host_release   = lpfc_nvmet_host_release,
1416 
1417 	.max_hw_queues  = 1,
1418 	.max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1419 	.max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1420 	.dma_boundary = 0xFFFFFFFF,
1421 
1422 	/* optional features */
1423 	.target_features = 0,
1424 	/* sizes of additional private data for data structures */
1425 	.target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1426 	.lsrqst_priv_sz = 0,
1427 };
1428 
1429 static void
__lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba * phba,struct lpfc_nvmet_ctx_info * infop)1430 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1431 		struct lpfc_nvmet_ctx_info *infop)
1432 {
1433 	struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1434 	unsigned long flags;
1435 
1436 	spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1437 	list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1438 				&infop->nvmet_ctx_list, list) {
1439 		spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1440 		list_del_init(&ctx_buf->list);
1441 		spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1442 
1443 		spin_lock(&phba->hbalock);
1444 		__lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1445 		spin_unlock(&phba->hbalock);
1446 
1447 		ctx_buf->sglq->state = SGL_FREED;
1448 		ctx_buf->sglq->ndlp = NULL;
1449 
1450 		spin_lock(&phba->sli4_hba.sgl_list_lock);
1451 		list_add_tail(&ctx_buf->sglq->list,
1452 				&phba->sli4_hba.lpfc_nvmet_sgl_list);
1453 		spin_unlock(&phba->sli4_hba.sgl_list_lock);
1454 
1455 		lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1456 		kfree(ctx_buf->context);
1457 	}
1458 	spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1459 }
1460 
1461 static void
lpfc_nvmet_cleanup_io_context(struct lpfc_hba * phba)1462 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1463 {
1464 	struct lpfc_nvmet_ctx_info *infop;
1465 	int i, j;
1466 
1467 	/* The first context list, MRQ 0 CPU 0 */
1468 	infop = phba->sli4_hba.nvmet_ctx_info;
1469 	if (!infop)
1470 		return;
1471 
1472 	/* Cycle the the entire CPU context list for every MRQ */
1473 	for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1474 		for_each_present_cpu(j) {
1475 			infop = lpfc_get_ctx_list(phba, j, i);
1476 			__lpfc_nvmet_clean_io_for_cpu(phba, infop);
1477 		}
1478 	}
1479 	kfree(phba->sli4_hba.nvmet_ctx_info);
1480 	phba->sli4_hba.nvmet_ctx_info = NULL;
1481 }
1482 
1483 static int
lpfc_nvmet_setup_io_context(struct lpfc_hba * phba)1484 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1485 {
1486 	struct lpfc_nvmet_ctxbuf *ctx_buf;
1487 	struct lpfc_iocbq *nvmewqe;
1488 	union lpfc_wqe128 *wqe;
1489 	struct lpfc_nvmet_ctx_info *last_infop;
1490 	struct lpfc_nvmet_ctx_info *infop;
1491 	int i, j, idx, cpu;
1492 
1493 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1494 			"6403 Allocate NVMET resources for %d XRIs\n",
1495 			phba->sli4_hba.nvmet_xri_cnt);
1496 
1497 	phba->sli4_hba.nvmet_ctx_info = kcalloc(
1498 		phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1499 		sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1500 	if (!phba->sli4_hba.nvmet_ctx_info) {
1501 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1502 				"6419 Failed allocate memory for "
1503 				"nvmet context lists\n");
1504 		return -ENOMEM;
1505 	}
1506 
1507 	/*
1508 	 * Assuming X CPUs in the system, and Y MRQs, allocate some
1509 	 * lpfc_nvmet_ctx_info structures as follows:
1510 	 *
1511 	 * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1512 	 * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1513 	 * ...
1514 	 * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1515 	 *
1516 	 * Each line represents a MRQ "silo" containing an entry for
1517 	 * every CPU.
1518 	 *
1519 	 * MRQ X is initially assumed to be associated with CPU X, thus
1520 	 * contexts are initially distributed across all MRQs using
1521 	 * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1522 	 * freed, the are freed to the MRQ silo based on the CPU number
1523 	 * of the IO completion. Thus a context that was allocated for MRQ A
1524 	 * whose IO completed on CPU B will be freed to cpuB/mrqA.
1525 	 */
1526 	for_each_possible_cpu(i) {
1527 		for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1528 			infop = lpfc_get_ctx_list(phba, i, j);
1529 			INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1530 			spin_lock_init(&infop->nvmet_ctx_list_lock);
1531 			infop->nvmet_ctx_list_cnt = 0;
1532 		}
1533 	}
1534 
1535 	/*
1536 	 * Setup the next CPU context info ptr for each MRQ.
1537 	 * MRQ 0 will cycle thru CPUs 0 - X separately from
1538 	 * MRQ 1 cycling thru CPUs 0 - X, and so on.
1539 	 */
1540 	for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1541 		last_infop = lpfc_get_ctx_list(phba,
1542 					       cpumask_first(cpu_present_mask),
1543 					       j);
1544 		for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1545 			infop = lpfc_get_ctx_list(phba, i, j);
1546 			infop->nvmet_ctx_next_cpu = last_infop;
1547 			last_infop = infop;
1548 		}
1549 	}
1550 
1551 	/* For all nvmet xris, allocate resources needed to process a
1552 	 * received command on a per xri basis.
1553 	 */
1554 	idx = 0;
1555 	cpu = cpumask_first(cpu_present_mask);
1556 	for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1557 		ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1558 		if (!ctx_buf) {
1559 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1560 					"6404 Ran out of memory for NVMET\n");
1561 			return -ENOMEM;
1562 		}
1563 
1564 		ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1565 					   GFP_KERNEL);
1566 		if (!ctx_buf->context) {
1567 			kfree(ctx_buf);
1568 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1569 					"6405 Ran out of NVMET "
1570 					"context memory\n");
1571 			return -ENOMEM;
1572 		}
1573 		ctx_buf->context->ctxbuf = ctx_buf;
1574 		ctx_buf->context->state = LPFC_NVME_STE_FREE;
1575 
1576 		ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1577 		if (!ctx_buf->iocbq) {
1578 			kfree(ctx_buf->context);
1579 			kfree(ctx_buf);
1580 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1581 					"6406 Ran out of NVMET iocb/WQEs\n");
1582 			return -ENOMEM;
1583 		}
1584 		ctx_buf->iocbq->cmd_flag = LPFC_IO_NVMET;
1585 		nvmewqe = ctx_buf->iocbq;
1586 		wqe = &nvmewqe->wqe;
1587 
1588 		/* Initialize WQE */
1589 		memset(wqe, 0, sizeof(union lpfc_wqe));
1590 
1591 		ctx_buf->iocbq->cmd_dmabuf = NULL;
1592 		spin_lock(&phba->sli4_hba.sgl_list_lock);
1593 		ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1594 		spin_unlock(&phba->sli4_hba.sgl_list_lock);
1595 		if (!ctx_buf->sglq) {
1596 			lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1597 			kfree(ctx_buf->context);
1598 			kfree(ctx_buf);
1599 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1600 					"6407 Ran out of NVMET XRIs\n");
1601 			return -ENOMEM;
1602 		}
1603 		INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1604 
1605 		/*
1606 		 * Add ctx to MRQidx context list. Our initial assumption
1607 		 * is MRQidx will be associated with CPUidx. This association
1608 		 * can change on the fly.
1609 		 */
1610 		infop = lpfc_get_ctx_list(phba, cpu, idx);
1611 		spin_lock(&infop->nvmet_ctx_list_lock);
1612 		list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1613 		infop->nvmet_ctx_list_cnt++;
1614 		spin_unlock(&infop->nvmet_ctx_list_lock);
1615 
1616 		/* Spread ctx structures evenly across all MRQs */
1617 		idx++;
1618 		if (idx >= phba->cfg_nvmet_mrq) {
1619 			idx = 0;
1620 			cpu = cpumask_first(cpu_present_mask);
1621 			continue;
1622 		}
1623 		cpu = cpumask_next(cpu, cpu_present_mask);
1624 		if (cpu == nr_cpu_ids)
1625 			cpu = cpumask_first(cpu_present_mask);
1626 
1627 	}
1628 
1629 	for_each_present_cpu(i) {
1630 		for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1631 			infop = lpfc_get_ctx_list(phba, i, j);
1632 			lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1633 					"6408 TOTAL NVMET ctx for CPU %d "
1634 					"MRQ %d: cnt %d nextcpu x%px\n",
1635 					i, j, infop->nvmet_ctx_list_cnt,
1636 					infop->nvmet_ctx_next_cpu);
1637 		}
1638 	}
1639 	return 0;
1640 }
1641 
1642 int
lpfc_nvmet_create_targetport(struct lpfc_hba * phba)1643 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1644 {
1645 	struct lpfc_vport  *vport = phba->pport;
1646 	struct lpfc_nvmet_tgtport *tgtp;
1647 	struct nvmet_fc_port_info pinfo;
1648 	int error;
1649 
1650 	if (phba->targetport)
1651 		return 0;
1652 
1653 	error = lpfc_nvmet_setup_io_context(phba);
1654 	if (error)
1655 		return error;
1656 
1657 	memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1658 	pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1659 	pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1660 	pinfo.port_id = vport->fc_myDID;
1661 
1662 	/* We need to tell the transport layer + 1 because it takes page
1663 	 * alignment into account. When space for the SGL is allocated we
1664 	 * allocate + 3, one for cmd, one for rsp and one for this alignment
1665 	 */
1666 	lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1667 	lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1668 	lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1669 
1670 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1671 	error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1672 					     &phba->pcidev->dev,
1673 					     &phba->targetport);
1674 #else
1675 	error = -ENOENT;
1676 #endif
1677 	if (error) {
1678 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1679 				"6025 Cannot register NVME targetport x%x: "
1680 				"portnm %llx nodenm %llx segs %d qs %d\n",
1681 				error,
1682 				pinfo.port_name, pinfo.node_name,
1683 				lpfc_tgttemplate.max_sgl_segments,
1684 				lpfc_tgttemplate.max_hw_queues);
1685 		phba->targetport = NULL;
1686 		phba->nvmet_support = 0;
1687 
1688 		lpfc_nvmet_cleanup_io_context(phba);
1689 
1690 	} else {
1691 		tgtp = (struct lpfc_nvmet_tgtport *)
1692 			phba->targetport->private;
1693 		tgtp->phba = phba;
1694 
1695 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1696 				"6026 Registered NVME "
1697 				"targetport: x%px, private x%px "
1698 				"portnm %llx nodenm %llx segs %d qs %d\n",
1699 				phba->targetport, tgtp,
1700 				pinfo.port_name, pinfo.node_name,
1701 				lpfc_tgttemplate.max_sgl_segments,
1702 				lpfc_tgttemplate.max_hw_queues);
1703 
1704 		atomic_set(&tgtp->rcv_ls_req_in, 0);
1705 		atomic_set(&tgtp->rcv_ls_req_out, 0);
1706 		atomic_set(&tgtp->rcv_ls_req_drop, 0);
1707 		atomic_set(&tgtp->xmt_ls_abort, 0);
1708 		atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1709 		atomic_set(&tgtp->xmt_ls_rsp, 0);
1710 		atomic_set(&tgtp->xmt_ls_drop, 0);
1711 		atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1712 		atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1713 		atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1714 		atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1715 		atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1716 		atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1717 		atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1718 		atomic_set(&tgtp->xmt_fcp_drop, 0);
1719 		atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1720 		atomic_set(&tgtp->xmt_fcp_read, 0);
1721 		atomic_set(&tgtp->xmt_fcp_write, 0);
1722 		atomic_set(&tgtp->xmt_fcp_rsp, 0);
1723 		atomic_set(&tgtp->xmt_fcp_release, 0);
1724 		atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1725 		atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1726 		atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1727 		atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1728 		atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1729 		atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1730 		atomic_set(&tgtp->xmt_fcp_abort, 0);
1731 		atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1732 		atomic_set(&tgtp->xmt_abort_unsol, 0);
1733 		atomic_set(&tgtp->xmt_abort_sol, 0);
1734 		atomic_set(&tgtp->xmt_abort_rsp, 0);
1735 		atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1736 		atomic_set(&tgtp->defer_ctx, 0);
1737 		atomic_set(&tgtp->defer_fod, 0);
1738 		atomic_set(&tgtp->defer_wqfull, 0);
1739 	}
1740 	return error;
1741 }
1742 
1743 int
lpfc_nvmet_update_targetport(struct lpfc_hba * phba)1744 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1745 {
1746 	struct lpfc_vport  *vport = phba->pport;
1747 
1748 	if (!phba->targetport)
1749 		return 0;
1750 
1751 	lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1752 			 "6007 Update NVMET port x%px did x%x\n",
1753 			 phba->targetport, vport->fc_myDID);
1754 
1755 	phba->targetport->port_id = vport->fc_myDID;
1756 	return 0;
1757 }
1758 
1759 /**
1760  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1761  * @phba: pointer to lpfc hba data structure.
1762  * @axri: pointer to the nvmet xri abort wcqe structure.
1763  *
1764  * This routine is invoked by the worker thread to process a SLI4 fast-path
1765  * NVMET aborted xri.
1766  **/
1767 void
lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba * phba,struct sli4_wcqe_xri_aborted * axri)1768 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1769 			    struct sli4_wcqe_xri_aborted *axri)
1770 {
1771 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1772 	uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1773 	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1774 	struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1775 	struct lpfc_nvmet_tgtport *tgtp;
1776 	struct nvmefc_tgt_fcp_req *req = NULL;
1777 	struct lpfc_nodelist *ndlp;
1778 	unsigned long iflag = 0;
1779 	int rrq_empty = 0;
1780 	bool released = false;
1781 
1782 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1783 			"6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1784 
1785 	if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1786 		return;
1787 
1788 	if (phba->targetport) {
1789 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1790 		atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1791 	}
1792 
1793 	spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1794 	list_for_each_entry_safe(ctxp, next_ctxp,
1795 				 &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1796 				 list) {
1797 		if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1798 			continue;
1799 
1800 		spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1801 				       iflag);
1802 
1803 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
1804 		/* Check if we already received a free context call
1805 		 * and we have completed processing an abort situation.
1806 		 */
1807 		if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1808 		    !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1809 			spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1810 			list_del_init(&ctxp->list);
1811 			spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1812 			released = true;
1813 		}
1814 		ctxp->flag &= ~LPFC_NVME_XBUSY;
1815 		spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1816 
1817 		rrq_empty = list_empty(&phba->active_rrq_list);
1818 		ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1819 		if (ndlp &&
1820 		    (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1821 		     ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1822 			lpfc_set_rrq_active(phba, ndlp,
1823 				ctxp->ctxbuf->sglq->sli4_lxritag,
1824 				rxid, 1);
1825 			lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1826 		}
1827 
1828 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1829 				"6318 XB aborted oxid x%x flg x%x (%x)\n",
1830 				ctxp->oxid, ctxp->flag, released);
1831 		if (released)
1832 			lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1833 
1834 		if (rrq_empty)
1835 			lpfc_worker_wake_up(phba);
1836 		return;
1837 	}
1838 	spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1839 	ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1840 	if (ctxp) {
1841 		/*
1842 		 *  Abort already done by FW, so BA_ACC sent.
1843 		 *  However, the transport may be unaware.
1844 		 */
1845 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1846 				"6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1847 				"flag x%x oxid x%x rxid x%x\n",
1848 				xri, ctxp->state, ctxp->flag, ctxp->oxid,
1849 				rxid);
1850 
1851 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
1852 		ctxp->flag |= LPFC_NVME_ABTS_RCV;
1853 		ctxp->state = LPFC_NVME_STE_ABORT;
1854 		spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1855 
1856 		lpfc_nvmeio_data(phba,
1857 				 "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1858 				 xri, raw_smp_processor_id(), 0);
1859 
1860 		req = &ctxp->hdlrctx.fcp_req;
1861 		if (req)
1862 			nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1863 	}
1864 #endif
1865 }
1866 
1867 int
lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport * vport,struct fc_frame_header * fc_hdr)1868 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1869 			   struct fc_frame_header *fc_hdr)
1870 {
1871 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1872 	struct lpfc_hba *phba = vport->phba;
1873 	struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1874 	struct nvmefc_tgt_fcp_req *rsp;
1875 	uint32_t sid;
1876 	uint16_t oxid, xri;
1877 	unsigned long iflag = 0;
1878 
1879 	sid = sli4_sid_from_fc_hdr(fc_hdr);
1880 	oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1881 
1882 	spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1883 	list_for_each_entry_safe(ctxp, next_ctxp,
1884 				 &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1885 				 list) {
1886 		if (ctxp->oxid != oxid || ctxp->sid != sid)
1887 			continue;
1888 
1889 		xri = ctxp->ctxbuf->sglq->sli4_xritag;
1890 
1891 		spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1892 				       iflag);
1893 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
1894 		ctxp->flag |= LPFC_NVME_ABTS_RCV;
1895 		spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1896 
1897 		lpfc_nvmeio_data(phba,
1898 			"NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1899 			xri, raw_smp_processor_id(), 0);
1900 
1901 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1902 				"6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1903 
1904 		rsp = &ctxp->hdlrctx.fcp_req;
1905 		nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1906 
1907 		/* Respond with BA_ACC accordingly */
1908 		lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1909 		return 0;
1910 	}
1911 	spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1912 	/* check the wait list */
1913 	if (phba->sli4_hba.nvmet_io_wait_cnt) {
1914 		struct rqb_dmabuf *nvmebuf;
1915 		struct fc_frame_header *fc_hdr_tmp;
1916 		u32 sid_tmp;
1917 		u16 oxid_tmp;
1918 		bool found = false;
1919 
1920 		spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1921 
1922 		/* match by oxid and s_id */
1923 		list_for_each_entry(nvmebuf,
1924 				    &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1925 				    hbuf.list) {
1926 			fc_hdr_tmp = (struct fc_frame_header *)
1927 					(nvmebuf->hbuf.virt);
1928 			oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1929 			sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1930 			if (oxid_tmp != oxid || sid_tmp != sid)
1931 				continue;
1932 
1933 			lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1934 					"6321 NVMET Rcv ABTS oxid x%x from x%x "
1935 					"is waiting for a ctxp\n",
1936 					oxid, sid);
1937 
1938 			list_del_init(&nvmebuf->hbuf.list);
1939 			phba->sli4_hba.nvmet_io_wait_cnt--;
1940 			found = true;
1941 			break;
1942 		}
1943 		spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1944 				       iflag);
1945 
1946 		/* free buffer since already posted a new DMA buffer to RQ */
1947 		if (found) {
1948 			nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1949 			/* Respond with BA_ACC accordingly */
1950 			lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1951 			return 0;
1952 		}
1953 	}
1954 
1955 	/* check active list */
1956 	ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1957 	if (ctxp) {
1958 		xri = ctxp->ctxbuf->sglq->sli4_xritag;
1959 
1960 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
1961 		ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1962 		spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1963 
1964 		lpfc_nvmeio_data(phba,
1965 				 "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1966 				 xri, raw_smp_processor_id(), 0);
1967 
1968 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1969 				"6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1970 				"flag x%x state x%x\n",
1971 				ctxp->oxid, xri, ctxp->flag, ctxp->state);
1972 
1973 		if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1974 			/* Notify the transport */
1975 			nvmet_fc_rcv_fcp_abort(phba->targetport,
1976 					       &ctxp->hdlrctx.fcp_req);
1977 		} else {
1978 			cancel_work_sync(&ctxp->ctxbuf->defer_work);
1979 			spin_lock_irqsave(&ctxp->ctxlock, iflag);
1980 			lpfc_nvmet_defer_release(phba, ctxp);
1981 			spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1982 		}
1983 		lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1984 					       ctxp->oxid);
1985 
1986 		lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1987 		return 0;
1988 	}
1989 
1990 	lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1991 			 oxid, raw_smp_processor_id(), 1);
1992 
1993 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1994 			"6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1995 
1996 	/* Respond with BA_RJT accordingly */
1997 	lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1998 #endif
1999 	return 0;
2000 }
2001 
2002 static void
lpfc_nvmet_wqfull_flush(struct lpfc_hba * phba,struct lpfc_queue * wq,struct lpfc_async_xchg_ctx * ctxp)2003 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2004 			struct lpfc_async_xchg_ctx *ctxp)
2005 {
2006 	struct lpfc_sli_ring *pring;
2007 	struct lpfc_iocbq *nvmewqeq;
2008 	struct lpfc_iocbq *next_nvmewqeq;
2009 	unsigned long iflags;
2010 	struct lpfc_wcqe_complete wcqe;
2011 	struct lpfc_wcqe_complete *wcqep;
2012 
2013 	pring = wq->pring;
2014 	wcqep = &wcqe;
2015 
2016 	/* Fake an ABORT error code back to cmpl routine */
2017 	memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2018 	bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2019 	wcqep->parameter = IOERR_ABORT_REQUESTED;
2020 
2021 	spin_lock_irqsave(&pring->ring_lock, iflags);
2022 	list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2023 				 &wq->wqfull_list, list) {
2024 		if (ctxp) {
2025 			/* Checking for a specific IO to flush */
2026 			if (nvmewqeq->context_un.axchg == ctxp) {
2027 				list_del(&nvmewqeq->list);
2028 				spin_unlock_irqrestore(&pring->ring_lock,
2029 						       iflags);
2030 				memcpy(&nvmewqeq->wcqe_cmpl, wcqep,
2031 				       sizeof(*wcqep));
2032 				lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2033 							  nvmewqeq);
2034 				return;
2035 			}
2036 			continue;
2037 		} else {
2038 			/* Flush all IOs */
2039 			list_del(&nvmewqeq->list);
2040 			spin_unlock_irqrestore(&pring->ring_lock, iflags);
2041 			memcpy(&nvmewqeq->wcqe_cmpl, wcqep, sizeof(*wcqep));
2042 			lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, nvmewqeq);
2043 			spin_lock_irqsave(&pring->ring_lock, iflags);
2044 		}
2045 	}
2046 	if (!ctxp)
2047 		wq->q_flag &= ~HBA_NVMET_WQFULL;
2048 	spin_unlock_irqrestore(&pring->ring_lock, iflags);
2049 }
2050 
2051 void
lpfc_nvmet_wqfull_process(struct lpfc_hba * phba,struct lpfc_queue * wq)2052 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2053 			  struct lpfc_queue *wq)
2054 {
2055 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2056 	struct lpfc_sli_ring *pring;
2057 	struct lpfc_iocbq *nvmewqeq;
2058 	struct lpfc_async_xchg_ctx *ctxp;
2059 	unsigned long iflags;
2060 	int rc;
2061 
2062 	/*
2063 	 * Some WQE slots are available, so try to re-issue anything
2064 	 * on the WQ wqfull_list.
2065 	 */
2066 	pring = wq->pring;
2067 	spin_lock_irqsave(&pring->ring_lock, iflags);
2068 	while (!list_empty(&wq->wqfull_list)) {
2069 		list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2070 				 list);
2071 		spin_unlock_irqrestore(&pring->ring_lock, iflags);
2072 		ctxp = nvmewqeq->context_un.axchg;
2073 		rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2074 		spin_lock_irqsave(&pring->ring_lock, iflags);
2075 		if (rc == -EBUSY) {
2076 			/* WQ was full again, so put it back on the list */
2077 			list_add(&nvmewqeq->list, &wq->wqfull_list);
2078 			spin_unlock_irqrestore(&pring->ring_lock, iflags);
2079 			return;
2080 		}
2081 		if (rc == WQE_SUCCESS) {
2082 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2083 			if (ctxp->ts_cmd_nvme) {
2084 				if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2085 					ctxp->ts_status_wqput = ktime_get_ns();
2086 				else
2087 					ctxp->ts_data_wqput = ktime_get_ns();
2088 			}
2089 #endif
2090 		} else {
2091 			WARN_ON(rc);
2092 		}
2093 	}
2094 	wq->q_flag &= ~HBA_NVMET_WQFULL;
2095 	spin_unlock_irqrestore(&pring->ring_lock, iflags);
2096 
2097 #endif
2098 }
2099 
2100 void
lpfc_nvmet_destroy_targetport(struct lpfc_hba * phba)2101 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2102 {
2103 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2104 	struct lpfc_nvmet_tgtport *tgtp;
2105 	struct lpfc_queue *wq;
2106 	uint32_t qidx;
2107 	DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2108 
2109 	if (phba->nvmet_support == 0)
2110 		return;
2111 	if (phba->targetport) {
2112 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2113 		for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2114 			wq = phba->sli4_hba.hdwq[qidx].io_wq;
2115 			lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2116 		}
2117 		tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2118 		nvmet_fc_unregister_targetport(phba->targetport);
2119 		if (!wait_for_completion_timeout(&tport_unreg_cmp,
2120 					msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2121 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2122 					"6179 Unreg targetport x%px timeout "
2123 					"reached.\n", phba->targetport);
2124 		lpfc_nvmet_cleanup_io_context(phba);
2125 	}
2126 	phba->targetport = NULL;
2127 #endif
2128 }
2129 
2130 /**
2131  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2132  * @phba: pointer to lpfc hba data structure.
2133  * @axchg: pointer to exchange context for the NVME LS request
2134  *
2135  * This routine is used for processing an asychronously received NVME LS
2136  * request. Any remaining validation is done and the LS is then forwarded
2137  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2138  *
2139  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2140  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2141  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2142  *
2143  * Returns 0 if LS was handled and delivered to the transport
2144  * Returns 1 if LS failed to be handled and should be dropped
2145  */
2146 int
lpfc_nvmet_handle_lsreq(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * axchg)2147 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2148 			struct lpfc_async_xchg_ctx *axchg)
2149 {
2150 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2151 	struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2152 	uint32_t *payload = axchg->payload;
2153 	int rc;
2154 
2155 	atomic_inc(&tgtp->rcv_ls_req_in);
2156 
2157 	/*
2158 	 * Driver passes the ndlp as the hosthandle argument allowing
2159 	 * the transport to generate LS requests for any associateions
2160 	 * that are created.
2161 	 */
2162 	rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2163 				 axchg->payload, axchg->size);
2164 
2165 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2166 			"6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2167 			"%08x %08x %08x\n", axchg->size, rc,
2168 			*payload, *(payload+1), *(payload+2),
2169 			*(payload+3), *(payload+4), *(payload+5));
2170 
2171 	if (!rc) {
2172 		atomic_inc(&tgtp->rcv_ls_req_out);
2173 		return 0;
2174 	}
2175 
2176 	atomic_inc(&tgtp->rcv_ls_req_drop);
2177 #endif
2178 	return 1;
2179 }
2180 
2181 static void
lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf * ctx_buf)2182 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2183 {
2184 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2185 	struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2186 	struct lpfc_hba *phba = ctxp->phba;
2187 	struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2188 	struct lpfc_nvmet_tgtport *tgtp;
2189 	uint32_t *payload, qno;
2190 	uint32_t rc;
2191 	unsigned long iflags;
2192 
2193 	if (!nvmebuf) {
2194 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2195 			"6159 process_rcv_fcp_req, nvmebuf is NULL, "
2196 			"oxid: x%x flg: x%x state: x%x\n",
2197 			ctxp->oxid, ctxp->flag, ctxp->state);
2198 		spin_lock_irqsave(&ctxp->ctxlock, iflags);
2199 		lpfc_nvmet_defer_release(phba, ctxp);
2200 		spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2201 		lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2202 						 ctxp->oxid);
2203 		return;
2204 	}
2205 
2206 	if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2207 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2208 				"6324 IO oxid x%x aborted\n",
2209 				ctxp->oxid);
2210 		return;
2211 	}
2212 
2213 	payload = (uint32_t *)(nvmebuf->dbuf.virt);
2214 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2215 	ctxp->flag |= LPFC_NVME_TNOTIFY;
2216 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2217 	if (ctxp->ts_isr_cmd)
2218 		ctxp->ts_cmd_nvme = ktime_get_ns();
2219 #endif
2220 	/*
2221 	 * The calling sequence should be:
2222 	 * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2223 	 * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2224 	 * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2225 	 * the NVME command / FC header is stored.
2226 	 * A buffer has already been reposted for this IO, so just free
2227 	 * the nvmebuf.
2228 	 */
2229 	rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2230 				  payload, ctxp->size);
2231 	/* Process FCP command */
2232 	if (rc == 0) {
2233 		atomic_inc(&tgtp->rcv_fcp_cmd_out);
2234 		spin_lock_irqsave(&ctxp->ctxlock, iflags);
2235 		if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2236 		    (nvmebuf != ctxp->rqb_buffer)) {
2237 			spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2238 			return;
2239 		}
2240 		ctxp->rqb_buffer = NULL;
2241 		spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2242 		lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2243 		return;
2244 	}
2245 
2246 	/* Processing of FCP command is deferred */
2247 	if (rc == -EOVERFLOW) {
2248 		lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2249 				 "from %06x\n",
2250 				 ctxp->oxid, ctxp->size, ctxp->sid);
2251 		atomic_inc(&tgtp->rcv_fcp_cmd_out);
2252 		atomic_inc(&tgtp->defer_fod);
2253 		spin_lock_irqsave(&ctxp->ctxlock, iflags);
2254 		if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2255 			spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2256 			return;
2257 		}
2258 		spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2259 		/*
2260 		 * Post a replacement DMA buffer to RQ and defer
2261 		 * freeing rcv buffer till .defer_rcv callback
2262 		 */
2263 		qno = nvmebuf->idx;
2264 		lpfc_post_rq_buffer(
2265 			phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2266 			phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2267 		return;
2268 	}
2269 	ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2270 	atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2271 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2272 			"2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2273 			ctxp->oxid, rc,
2274 			atomic_read(&tgtp->rcv_fcp_cmd_in),
2275 			atomic_read(&tgtp->rcv_fcp_cmd_out),
2276 			atomic_read(&tgtp->xmt_fcp_release));
2277 	lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2278 			 ctxp->oxid, ctxp->size, ctxp->sid);
2279 	spin_lock_irqsave(&ctxp->ctxlock, iflags);
2280 	lpfc_nvmet_defer_release(phba, ctxp);
2281 	spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2282 	lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2283 #endif
2284 }
2285 
2286 static void
lpfc_nvmet_fcp_rqst_defer_work(struct work_struct * work)2287 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2288 {
2289 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2290 	struct lpfc_nvmet_ctxbuf *ctx_buf =
2291 		container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2292 
2293 	lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2294 #endif
2295 }
2296 
2297 static struct lpfc_nvmet_ctxbuf *
lpfc_nvmet_replenish_context(struct lpfc_hba * phba,struct lpfc_nvmet_ctx_info * current_infop)2298 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2299 			     struct lpfc_nvmet_ctx_info *current_infop)
2300 {
2301 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2302 	struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2303 	struct lpfc_nvmet_ctx_info *get_infop;
2304 	int i;
2305 
2306 	/*
2307 	 * The current_infop for the MRQ a NVME command IU was received
2308 	 * on is empty. Our goal is to replenish this MRQs context
2309 	 * list from a another CPUs.
2310 	 *
2311 	 * First we need to pick a context list to start looking on.
2312 	 * nvmet_ctx_start_cpu has available context the last time
2313 	 * we needed to replenish this CPU where nvmet_ctx_next_cpu
2314 	 * is just the next sequential CPU for this MRQ.
2315 	 */
2316 	if (current_infop->nvmet_ctx_start_cpu)
2317 		get_infop = current_infop->nvmet_ctx_start_cpu;
2318 	else
2319 		get_infop = current_infop->nvmet_ctx_next_cpu;
2320 
2321 	for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2322 		if (get_infop == current_infop) {
2323 			get_infop = get_infop->nvmet_ctx_next_cpu;
2324 			continue;
2325 		}
2326 		spin_lock(&get_infop->nvmet_ctx_list_lock);
2327 
2328 		/* Just take the entire context list, if there are any */
2329 		if (get_infop->nvmet_ctx_list_cnt) {
2330 			list_splice_init(&get_infop->nvmet_ctx_list,
2331 				    &current_infop->nvmet_ctx_list);
2332 			current_infop->nvmet_ctx_list_cnt =
2333 				get_infop->nvmet_ctx_list_cnt - 1;
2334 			get_infop->nvmet_ctx_list_cnt = 0;
2335 			spin_unlock(&get_infop->nvmet_ctx_list_lock);
2336 
2337 			current_infop->nvmet_ctx_start_cpu = get_infop;
2338 			list_remove_head(&current_infop->nvmet_ctx_list,
2339 					 ctx_buf, struct lpfc_nvmet_ctxbuf,
2340 					 list);
2341 			return ctx_buf;
2342 		}
2343 
2344 		/* Otherwise, move on to the next CPU for this MRQ */
2345 		spin_unlock(&get_infop->nvmet_ctx_list_lock);
2346 		get_infop = get_infop->nvmet_ctx_next_cpu;
2347 	}
2348 
2349 #endif
2350 	/* Nothing found, all contexts for the MRQ are in-flight */
2351 	return NULL;
2352 }
2353 
2354 /**
2355  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2356  * @phba: pointer to lpfc hba data structure.
2357  * @idx: relative index of MRQ vector
2358  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2359  * @isr_timestamp: in jiffies.
2360  * @cqflag: cq processing information regarding workload.
2361  *
2362  * This routine is used for processing the WQE associated with a unsolicited
2363  * event. It first determines whether there is an existing ndlp that matches
2364  * the DID from the unsolicited WQE. If not, it will create a new one with
2365  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2366  * WQE is then used to invoke the proper routine and to set up proper state
2367  * of the discovery state machine.
2368  **/
2369 static void
lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba * phba,uint32_t idx,struct rqb_dmabuf * nvmebuf,uint64_t isr_timestamp,uint8_t cqflag)2370 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2371 			    uint32_t idx,
2372 			    struct rqb_dmabuf *nvmebuf,
2373 			    uint64_t isr_timestamp,
2374 			    uint8_t cqflag)
2375 {
2376 	struct lpfc_async_xchg_ctx *ctxp;
2377 	struct lpfc_nvmet_tgtport *tgtp;
2378 	struct fc_frame_header *fc_hdr;
2379 	struct lpfc_nvmet_ctxbuf *ctx_buf;
2380 	struct lpfc_nvmet_ctx_info *current_infop;
2381 	uint32_t size, oxid, sid, qno;
2382 	unsigned long iflag;
2383 	int current_cpu;
2384 
2385 	if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2386 		return;
2387 
2388 	ctx_buf = NULL;
2389 	if (!nvmebuf || !phba->targetport) {
2390 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2391 				"6157 NVMET FCP Drop IO\n");
2392 		if (nvmebuf)
2393 			lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2394 		return;
2395 	}
2396 
2397 	/*
2398 	 * Get a pointer to the context list for this MRQ based on
2399 	 * the CPU this MRQ IRQ is associated with. If the CPU association
2400 	 * changes from our initial assumption, the context list could
2401 	 * be empty, thus it would need to be replenished with the
2402 	 * context list from another CPU for this MRQ.
2403 	 */
2404 	current_cpu = raw_smp_processor_id();
2405 	current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2406 	spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2407 	if (current_infop->nvmet_ctx_list_cnt) {
2408 		list_remove_head(&current_infop->nvmet_ctx_list,
2409 				 ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2410 		current_infop->nvmet_ctx_list_cnt--;
2411 	} else {
2412 		ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2413 	}
2414 	spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2415 
2416 	fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2417 	oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2418 	size = nvmebuf->bytes_recv;
2419 
2420 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2421 	if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2422 		this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2423 		if (idx != current_cpu)
2424 			lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2425 					"6703 CPU Check rcv: "
2426 					"cpu %d expect %d\n",
2427 					current_cpu, idx);
2428 	}
2429 #endif
2430 
2431 	lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2432 			 oxid, size, raw_smp_processor_id());
2433 
2434 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2435 
2436 	if (!ctx_buf) {
2437 		/* Queue this NVME IO to process later */
2438 		spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2439 		list_add_tail(&nvmebuf->hbuf.list,
2440 			      &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2441 		phba->sli4_hba.nvmet_io_wait_cnt++;
2442 		phba->sli4_hba.nvmet_io_wait_total++;
2443 		spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2444 				       iflag);
2445 
2446 		/* Post a brand new DMA buffer to RQ */
2447 		qno = nvmebuf->idx;
2448 		lpfc_post_rq_buffer(
2449 			phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2450 			phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2451 
2452 		atomic_inc(&tgtp->defer_ctx);
2453 		return;
2454 	}
2455 
2456 	sid = sli4_sid_from_fc_hdr(fc_hdr);
2457 
2458 	ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2459 	spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2460 	list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2461 	spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2462 	if (ctxp->state != LPFC_NVME_STE_FREE) {
2463 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2464 				"6414 NVMET Context corrupt %d %d oxid x%x\n",
2465 				ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2466 	}
2467 	ctxp->wqeq = NULL;
2468 	ctxp->offset = 0;
2469 	ctxp->phba = phba;
2470 	ctxp->size = size;
2471 	ctxp->oxid = oxid;
2472 	ctxp->sid = sid;
2473 	ctxp->idx = idx;
2474 	ctxp->state = LPFC_NVME_STE_RCV;
2475 	ctxp->entry_cnt = 1;
2476 	ctxp->flag = 0;
2477 	ctxp->ctxbuf = ctx_buf;
2478 	ctxp->rqb_buffer = (void *)nvmebuf;
2479 	ctxp->hdwq = NULL;
2480 	spin_lock_init(&ctxp->ctxlock);
2481 
2482 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2483 	if (isr_timestamp)
2484 		ctxp->ts_isr_cmd = isr_timestamp;
2485 	ctxp->ts_cmd_nvme = 0;
2486 	ctxp->ts_nvme_data = 0;
2487 	ctxp->ts_data_wqput = 0;
2488 	ctxp->ts_isr_data = 0;
2489 	ctxp->ts_data_nvme = 0;
2490 	ctxp->ts_nvme_status = 0;
2491 	ctxp->ts_status_wqput = 0;
2492 	ctxp->ts_isr_status = 0;
2493 	ctxp->ts_status_nvme = 0;
2494 #endif
2495 
2496 	atomic_inc(&tgtp->rcv_fcp_cmd_in);
2497 	/* check for cq processing load */
2498 	if (!cqflag) {
2499 		lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2500 		return;
2501 	}
2502 
2503 	if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2504 		atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2505 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2506 				"6325 Unable to queue work for oxid x%x. "
2507 				"FCP Drop IO [x%x x%x x%x]\n",
2508 				ctxp->oxid,
2509 				atomic_read(&tgtp->rcv_fcp_cmd_in),
2510 				atomic_read(&tgtp->rcv_fcp_cmd_out),
2511 				atomic_read(&tgtp->xmt_fcp_release));
2512 
2513 		spin_lock_irqsave(&ctxp->ctxlock, iflag);
2514 		lpfc_nvmet_defer_release(phba, ctxp);
2515 		spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2516 		lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2517 	}
2518 }
2519 
2520 /**
2521  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2522  * @phba: pointer to lpfc hba data structure.
2523  * @idx: relative index of MRQ vector
2524  * @nvmebuf: pointer to received nvme data structure.
2525  * @isr_timestamp: in jiffies.
2526  * @cqflag: cq processing information regarding workload.
2527  *
2528  * This routine is used to process an unsolicited event received from a SLI
2529  * (Service Level Interface) ring. The actual processing of the data buffer
2530  * associated with the unsolicited event is done by invoking the routine
2531  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2532  * SLI RQ on which the unsolicited event was received.
2533  **/
2534 void
lpfc_nvmet_unsol_fcp_event(struct lpfc_hba * phba,uint32_t idx,struct rqb_dmabuf * nvmebuf,uint64_t isr_timestamp,uint8_t cqflag)2535 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2536 			   uint32_t idx,
2537 			   struct rqb_dmabuf *nvmebuf,
2538 			   uint64_t isr_timestamp,
2539 			   uint8_t cqflag)
2540 {
2541 	if (!nvmebuf) {
2542 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2543 				"3167 NVMET FCP Drop IO\n");
2544 		return;
2545 	}
2546 	if (phba->nvmet_support == 0) {
2547 		lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2548 		return;
2549 	}
2550 	lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2551 }
2552 
2553 /**
2554  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2555  * @phba: pointer to a host N_Port data structure.
2556  * @ctxp: Context info for NVME LS Request
2557  * @rspbuf: DMA buffer of NVME command.
2558  * @rspsize: size of the NVME command.
2559  *
2560  * This routine is used for allocating a lpfc-WQE data structure from
2561  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2562  * passed into the routine for discovery state machine to issue an Extended
2563  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2564  * and preparation routine that is used by all the discovery state machine
2565  * routines and the NVME command-specific fields will be later set up by
2566  * the individual discovery machine routines after calling this routine
2567  * allocating and preparing a generic WQE data structure. It fills in the
2568  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2569  * payload and response payload (if expected). The reference count on the
2570  * ndlp is incremented by 1 and the reference to the ndlp is put into
2571  * context1 of the WQE data structure for this WQE to hold the ndlp
2572  * reference for the command's callback function to access later.
2573  *
2574  * Return code
2575  *   Pointer to the newly allocated/prepared nvme wqe data structure
2576  *   NULL - when nvme wqe data structure allocation/preparation failed
2577  **/
2578 static struct lpfc_iocbq *
lpfc_nvmet_prep_ls_wqe(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp,dma_addr_t rspbuf,uint16_t rspsize)2579 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2580 		       struct lpfc_async_xchg_ctx *ctxp,
2581 		       dma_addr_t rspbuf, uint16_t rspsize)
2582 {
2583 	struct lpfc_nodelist *ndlp;
2584 	struct lpfc_iocbq *nvmewqe;
2585 	union lpfc_wqe128 *wqe;
2586 
2587 	if (!lpfc_is_link_up(phba)) {
2588 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2589 				"6104 NVMET prep LS wqe: link err: "
2590 				"NPORT x%x oxid:x%x ste %d\n",
2591 				ctxp->sid, ctxp->oxid, ctxp->state);
2592 		return NULL;
2593 	}
2594 
2595 	/* Allocate buffer for  command wqe */
2596 	nvmewqe = lpfc_sli_get_iocbq(phba);
2597 	if (nvmewqe == NULL) {
2598 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2599 				"6105 NVMET prep LS wqe: No WQE: "
2600 				"NPORT x%x oxid x%x ste %d\n",
2601 				ctxp->sid, ctxp->oxid, ctxp->state);
2602 		return NULL;
2603 	}
2604 
2605 	ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2606 	if (!ndlp ||
2607 	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2608 	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2609 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2610 				"6106 NVMET prep LS wqe: No ndlp: "
2611 				"NPORT x%x oxid x%x ste %d\n",
2612 				ctxp->sid, ctxp->oxid, ctxp->state);
2613 		goto nvme_wqe_free_wqeq_exit;
2614 	}
2615 	ctxp->wqeq = nvmewqe;
2616 
2617 	/* prevent preparing wqe with NULL ndlp reference */
2618 	nvmewqe->ndlp = lpfc_nlp_get(ndlp);
2619 	if (!nvmewqe->ndlp)
2620 		goto nvme_wqe_free_wqeq_exit;
2621 	nvmewqe->context_un.axchg = ctxp;
2622 
2623 	wqe = &nvmewqe->wqe;
2624 	memset(wqe, 0, sizeof(union lpfc_wqe));
2625 
2626 	/* Words 0 - 2 */
2627 	wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2628 	wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2629 	wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2630 	wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2631 
2632 	/* Word 3 */
2633 
2634 	/* Word 4 */
2635 
2636 	/* Word 5 */
2637 	bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2638 	bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2639 	bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2640 	bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2641 	bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2642 
2643 	/* Word 6 */
2644 	bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2645 	       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2646 	bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2647 
2648 	/* Word 7 */
2649 	bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2650 	       CMD_XMIT_SEQUENCE64_WQE);
2651 	bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2652 	bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2653 	bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2654 
2655 	/* Word 8 */
2656 	wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2657 
2658 	/* Word 9 */
2659 	bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2660 	/* Needs to be set by caller */
2661 	bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2662 
2663 	/* Word 10 */
2664 	bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2665 	bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2666 	bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2667 	       LPFC_WQE_LENLOC_WORD12);
2668 	bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2669 
2670 	/* Word 11 */
2671 	bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2672 	       LPFC_WQE_CQ_ID_DEFAULT);
2673 	bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2674 	       OTHER_COMMAND);
2675 
2676 	/* Word 12 */
2677 	wqe->xmit_sequence.xmit_len = rspsize;
2678 
2679 	nvmewqe->retry = 1;
2680 	nvmewqe->vport = phba->pport;
2681 	nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2682 	nvmewqe->cmd_flag |= LPFC_IO_NVME_LS;
2683 
2684 	/* Xmit NVMET response to remote NPORT <did> */
2685 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2686 			"6039 Xmit NVMET LS response to remote "
2687 			"NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2688 			ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2689 			rspsize);
2690 	return nvmewqe;
2691 
2692 nvme_wqe_free_wqeq_exit:
2693 	nvmewqe->context_un.axchg = NULL;
2694 	nvmewqe->ndlp = NULL;
2695 	nvmewqe->bpl_dmabuf = NULL;
2696 	lpfc_sli_release_iocbq(phba, nvmewqe);
2697 	return NULL;
2698 }
2699 
2700 
2701 static struct lpfc_iocbq *
lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp)2702 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2703 			struct lpfc_async_xchg_ctx *ctxp)
2704 {
2705 	struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2706 	struct lpfc_nvmet_tgtport *tgtp;
2707 	struct sli4_sge *sgl;
2708 	struct lpfc_nodelist *ndlp;
2709 	struct lpfc_iocbq *nvmewqe;
2710 	struct scatterlist *sgel;
2711 	union lpfc_wqe128 *wqe;
2712 	struct ulp_bde64 *bde;
2713 	dma_addr_t physaddr;
2714 	int i, cnt, nsegs;
2715 	bool use_pbde = false;
2716 	int xc = 1;
2717 
2718 	if (!lpfc_is_link_up(phba)) {
2719 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2720 				"6107 NVMET prep FCP wqe: link err:"
2721 				"NPORT x%x oxid x%x ste %d\n",
2722 				ctxp->sid, ctxp->oxid, ctxp->state);
2723 		return NULL;
2724 	}
2725 
2726 	ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2727 	if (!ndlp ||
2728 	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2729 	     (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2730 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2731 				"6108 NVMET prep FCP wqe: no ndlp: "
2732 				"NPORT x%x oxid x%x ste %d\n",
2733 				ctxp->sid, ctxp->oxid, ctxp->state);
2734 		return NULL;
2735 	}
2736 
2737 	if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2738 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2739 				"6109 NVMET prep FCP wqe: seg cnt err: "
2740 				"NPORT x%x oxid x%x ste %d cnt %d\n",
2741 				ctxp->sid, ctxp->oxid, ctxp->state,
2742 				phba->cfg_nvme_seg_cnt);
2743 		return NULL;
2744 	}
2745 	nsegs = rsp->sg_cnt;
2746 
2747 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2748 	nvmewqe = ctxp->wqeq;
2749 	if (nvmewqe == NULL) {
2750 		/* Allocate buffer for  command wqe */
2751 		nvmewqe = ctxp->ctxbuf->iocbq;
2752 		if (nvmewqe == NULL) {
2753 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2754 					"6110 NVMET prep FCP wqe: No "
2755 					"WQE: NPORT x%x oxid x%x ste %d\n",
2756 					ctxp->sid, ctxp->oxid, ctxp->state);
2757 			return NULL;
2758 		}
2759 		ctxp->wqeq = nvmewqe;
2760 		xc = 0; /* create new XRI */
2761 		nvmewqe->sli4_lxritag = NO_XRI;
2762 		nvmewqe->sli4_xritag = NO_XRI;
2763 	}
2764 
2765 	/* Sanity check */
2766 	if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2767 	    (ctxp->entry_cnt == 1)) ||
2768 	    (ctxp->state == LPFC_NVME_STE_DATA)) {
2769 		wqe = &nvmewqe->wqe;
2770 	} else {
2771 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2772 				"6111 Wrong state NVMET FCP: %d  cnt %d\n",
2773 				ctxp->state, ctxp->entry_cnt);
2774 		return NULL;
2775 	}
2776 
2777 	sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2778 	switch (rsp->op) {
2779 	case NVMET_FCOP_READDATA:
2780 	case NVMET_FCOP_READDATA_RSP:
2781 		/* From the tsend template, initialize words 7 - 11 */
2782 		memcpy(&wqe->words[7],
2783 		       &lpfc_tsend_cmd_template.words[7],
2784 		       sizeof(uint32_t) * 5);
2785 
2786 		/* Words 0 - 2 : The first sg segment */
2787 		sgel = &rsp->sg[0];
2788 		physaddr = sg_dma_address(sgel);
2789 		wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2790 		wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2791 		wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2792 		wqe->fcp_tsend.bde.addrHigh =
2793 			cpu_to_le32(putPaddrHigh(physaddr));
2794 
2795 		/* Word 3 */
2796 		wqe->fcp_tsend.payload_offset_len = 0;
2797 
2798 		/* Word 4 */
2799 		wqe->fcp_tsend.relative_offset = ctxp->offset;
2800 
2801 		/* Word 5 */
2802 		wqe->fcp_tsend.reserved = 0;
2803 
2804 		/* Word 6 */
2805 		bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2806 		       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2807 		bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2808 		       nvmewqe->sli4_xritag);
2809 
2810 		/* Word 7 - set ar later */
2811 
2812 		/* Word 8 */
2813 		wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2814 
2815 		/* Word 9 */
2816 		bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2817 		bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2818 
2819 		/* Word 10 - set wqes later, in template xc=1 */
2820 		if (!xc)
2821 			bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2822 
2823 		/* Word 12 */
2824 		wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2825 
2826 		/* Setup 2 SKIP SGEs */
2827 		sgl->addr_hi = 0;
2828 		sgl->addr_lo = 0;
2829 		sgl->word2 = 0;
2830 		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2831 		sgl->word2 = cpu_to_le32(sgl->word2);
2832 		sgl->sge_len = 0;
2833 		sgl++;
2834 		sgl->addr_hi = 0;
2835 		sgl->addr_lo = 0;
2836 		sgl->word2 = 0;
2837 		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2838 		sgl->word2 = cpu_to_le32(sgl->word2);
2839 		sgl->sge_len = 0;
2840 		sgl++;
2841 		if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2842 			atomic_inc(&tgtp->xmt_fcp_read_rsp);
2843 
2844 			/* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2845 
2846 			if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2847 				if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2848 					bf_set(wqe_sup,
2849 					       &wqe->fcp_tsend.wqe_com, 1);
2850 			} else {
2851 				bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2852 				bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2853 				bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2854 				       ((rsp->rsplen >> 2) - 1));
2855 				memcpy(&wqe->words[16], rsp->rspaddr,
2856 				       rsp->rsplen);
2857 			}
2858 		} else {
2859 			atomic_inc(&tgtp->xmt_fcp_read);
2860 
2861 			/* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2862 			bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2863 		}
2864 		break;
2865 
2866 	case NVMET_FCOP_WRITEDATA:
2867 		/* From the treceive template, initialize words 3 - 11 */
2868 		memcpy(&wqe->words[3],
2869 		       &lpfc_treceive_cmd_template.words[3],
2870 		       sizeof(uint32_t) * 9);
2871 
2872 		/* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2873 		wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2874 		wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2875 		wqe->fcp_treceive.bde.addrLow = 0;
2876 		wqe->fcp_treceive.bde.addrHigh = 0;
2877 
2878 		/* Word 4 */
2879 		wqe->fcp_treceive.relative_offset = ctxp->offset;
2880 
2881 		/* Word 6 */
2882 		bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2883 		       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2884 		bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2885 		       nvmewqe->sli4_xritag);
2886 
2887 		/* Word 7 */
2888 
2889 		/* Word 8 */
2890 		wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2891 
2892 		/* Word 9 */
2893 		bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2894 		bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2895 
2896 		/* Word 10 - in template xc=1 */
2897 		if (!xc)
2898 			bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2899 
2900 		/* Word 11 - check for pbde */
2901 		if (nsegs == 1 && phba->cfg_enable_pbde) {
2902 			use_pbde = true;
2903 			/* Word 11 - PBDE bit already preset by template */
2904 		} else {
2905 			/* Overwrite default template setting */
2906 			bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2907 		}
2908 
2909 		/* Word 12 */
2910 		wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2911 
2912 		/* Setup 2 SKIP SGEs */
2913 		sgl->addr_hi = 0;
2914 		sgl->addr_lo = 0;
2915 		sgl->word2 = 0;
2916 		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2917 		sgl->word2 = cpu_to_le32(sgl->word2);
2918 		sgl->sge_len = 0;
2919 		sgl++;
2920 		sgl->addr_hi = 0;
2921 		sgl->addr_lo = 0;
2922 		sgl->word2 = 0;
2923 		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2924 		sgl->word2 = cpu_to_le32(sgl->word2);
2925 		sgl->sge_len = 0;
2926 		sgl++;
2927 		atomic_inc(&tgtp->xmt_fcp_write);
2928 		break;
2929 
2930 	case NVMET_FCOP_RSP:
2931 		/* From the treceive template, initialize words 4 - 11 */
2932 		memcpy(&wqe->words[4],
2933 		       &lpfc_trsp_cmd_template.words[4],
2934 		       sizeof(uint32_t) * 8);
2935 
2936 		/* Words 0 - 2 */
2937 		physaddr = rsp->rspdma;
2938 		wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2939 		wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2940 		wqe->fcp_trsp.bde.addrLow =
2941 			cpu_to_le32(putPaddrLow(physaddr));
2942 		wqe->fcp_trsp.bde.addrHigh =
2943 			cpu_to_le32(putPaddrHigh(physaddr));
2944 
2945 		/* Word 3 */
2946 		wqe->fcp_trsp.response_len = rsp->rsplen;
2947 
2948 		/* Word 6 */
2949 		bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2950 		       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2951 		bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2952 		       nvmewqe->sli4_xritag);
2953 
2954 		/* Word 7 */
2955 
2956 		/* Word 8 */
2957 		wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2958 
2959 		/* Word 9 */
2960 		bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2961 		bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2962 
2963 		/* Word 10 */
2964 		if (xc)
2965 			bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2966 
2967 		/* Word 11 */
2968 		/* In template wqes=0 irsp=0 irsplen=0 - good response */
2969 		if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2970 			/* Bad response - embed it */
2971 			bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2972 			bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2973 			bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2974 			       ((rsp->rsplen >> 2) - 1));
2975 			memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2976 		}
2977 
2978 		/* Word 12 */
2979 		wqe->fcp_trsp.rsvd_12_15[0] = 0;
2980 
2981 		/* Use rspbuf, NOT sg list */
2982 		nsegs = 0;
2983 		sgl->word2 = 0;
2984 		atomic_inc(&tgtp->xmt_fcp_rsp);
2985 		break;
2986 
2987 	default:
2988 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2989 				"6064 Unknown Rsp Op %d\n",
2990 				rsp->op);
2991 		return NULL;
2992 	}
2993 
2994 	nvmewqe->retry = 1;
2995 	nvmewqe->vport = phba->pport;
2996 	nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2997 	nvmewqe->ndlp = ndlp;
2998 
2999 	for_each_sg(rsp->sg, sgel, nsegs, i) {
3000 		physaddr = sg_dma_address(sgel);
3001 		cnt = sg_dma_len(sgel);
3002 		sgl->addr_hi = putPaddrHigh(physaddr);
3003 		sgl->addr_lo = putPaddrLow(physaddr);
3004 		sgl->word2 = 0;
3005 		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3006 		bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3007 		if ((i+1) == rsp->sg_cnt)
3008 			bf_set(lpfc_sli4_sge_last, sgl, 1);
3009 		sgl->word2 = cpu_to_le32(sgl->word2);
3010 		sgl->sge_len = cpu_to_le32(cnt);
3011 		sgl++;
3012 		ctxp->offset += cnt;
3013 	}
3014 
3015 	bde = (struct ulp_bde64 *)&wqe->words[13];
3016 	if (use_pbde) {
3017 		/* decrement sgl ptr backwards once to first data sge */
3018 		sgl--;
3019 
3020 		/* Words 13-15 (PBDE) */
3021 		bde->addrLow = sgl->addr_lo;
3022 		bde->addrHigh = sgl->addr_hi;
3023 		bde->tus.f.bdeSize = le32_to_cpu(sgl->sge_len);
3024 		bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3025 		bde->tus.w = cpu_to_le32(bde->tus.w);
3026 	} else {
3027 		memset(bde, 0, sizeof(struct ulp_bde64));
3028 	}
3029 	ctxp->state = LPFC_NVME_STE_DATA;
3030 	ctxp->entry_cnt++;
3031 	return nvmewqe;
3032 }
3033 
3034 /**
3035  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3036  * @phba: Pointer to HBA context object.
3037  * @cmdwqe: Pointer to driver command WQE object.
3038  * @rspwqe: Pointer to driver response WQE object.
3039  *
3040  * The function is called from SLI ring event handler with no
3041  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3042  * The function frees memory resources used for the NVME commands.
3043  **/
3044 static void
lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)3045 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3046 			     struct lpfc_iocbq *rspwqe)
3047 {
3048 	struct lpfc_async_xchg_ctx *ctxp;
3049 	struct lpfc_nvmet_tgtport *tgtp;
3050 	uint32_t result;
3051 	unsigned long flags;
3052 	bool released = false;
3053 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3054 
3055 	ctxp = cmdwqe->context_un.axchg;
3056 	result = wcqe->parameter;
3057 
3058 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3059 	if (ctxp->flag & LPFC_NVME_ABORT_OP)
3060 		atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3061 
3062 	spin_lock_irqsave(&ctxp->ctxlock, flags);
3063 	ctxp->state = LPFC_NVME_STE_DONE;
3064 
3065 	/* Check if we already received a free context call
3066 	 * and we have completed processing an abort situation.
3067 	 */
3068 	if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3069 	    !(ctxp->flag & LPFC_NVME_XBUSY)) {
3070 		spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3071 		list_del_init(&ctxp->list);
3072 		spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3073 		released = true;
3074 	}
3075 	ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3076 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3077 	atomic_inc(&tgtp->xmt_abort_rsp);
3078 
3079 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3080 			"6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3081 			"WCQE: %08x %08x %08x %08x\n",
3082 			ctxp->oxid, ctxp->flag, released,
3083 			wcqe->word0, wcqe->total_data_placed,
3084 			result, wcqe->word3);
3085 
3086 	cmdwqe->rsp_dmabuf = NULL;
3087 	cmdwqe->bpl_dmabuf = NULL;
3088 	/*
3089 	 * if transport has released ctx, then can reuse it. Otherwise,
3090 	 * will be recycled by transport release call.
3091 	 */
3092 	if (released)
3093 		lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3094 
3095 	/* This is the iocbq for the abort, not the command */
3096 	lpfc_sli_release_iocbq(phba, cmdwqe);
3097 
3098 	/* Since iaab/iaar are NOT set, there is no work left.
3099 	 * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3100 	 * should have been called already.
3101 	 */
3102 }
3103 
3104 /**
3105  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3106  * @phba: Pointer to HBA context object.
3107  * @cmdwqe: Pointer to driver command WQE object.
3108  * @rspwqe: Pointer to driver response WQE object.
3109  *
3110  * The function is called from SLI ring event handler with no
3111  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3112  * The function frees memory resources used for the NVME commands.
3113  **/
3114 static void
lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)3115 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3116 			       struct lpfc_iocbq *rspwqe)
3117 {
3118 	struct lpfc_async_xchg_ctx *ctxp;
3119 	struct lpfc_nvmet_tgtport *tgtp;
3120 	unsigned long flags;
3121 	uint32_t result;
3122 	bool released = false;
3123 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3124 
3125 	ctxp = cmdwqe->context_un.axchg;
3126 	result = wcqe->parameter;
3127 
3128 	if (!ctxp) {
3129 		/* if context is clear, related io alrady complete */
3130 		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3131 				"6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3132 				wcqe->word0, wcqe->total_data_placed,
3133 				result, wcqe->word3);
3134 		return;
3135 	}
3136 
3137 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3138 	spin_lock_irqsave(&ctxp->ctxlock, flags);
3139 	if (ctxp->flag & LPFC_NVME_ABORT_OP)
3140 		atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3141 
3142 	/* Sanity check */
3143 	if (ctxp->state != LPFC_NVME_STE_ABORT) {
3144 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3145 				"6112 ABTS Wrong state:%d oxid x%x\n",
3146 				ctxp->state, ctxp->oxid);
3147 	}
3148 
3149 	/* Check if we already received a free context call
3150 	 * and we have completed processing an abort situation.
3151 	 */
3152 	ctxp->state = LPFC_NVME_STE_DONE;
3153 	if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3154 	    !(ctxp->flag & LPFC_NVME_XBUSY)) {
3155 		spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3156 		list_del_init(&ctxp->list);
3157 		spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3158 		released = true;
3159 	}
3160 	ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3161 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3162 	atomic_inc(&tgtp->xmt_abort_rsp);
3163 
3164 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3165 			"6316 ABTS cmpl oxid x%x flg x%x (%x) "
3166 			"WCQE: %08x %08x %08x %08x\n",
3167 			ctxp->oxid, ctxp->flag, released,
3168 			wcqe->word0, wcqe->total_data_placed,
3169 			result, wcqe->word3);
3170 
3171 	cmdwqe->rsp_dmabuf = NULL;
3172 	cmdwqe->bpl_dmabuf = NULL;
3173 	/*
3174 	 * if transport has released ctx, then can reuse it. Otherwise,
3175 	 * will be recycled by transport release call.
3176 	 */
3177 	if (released)
3178 		lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3179 
3180 	/* Since iaab/iaar are NOT set, there is no work left.
3181 	 * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3182 	 * should have been called already.
3183 	 */
3184 }
3185 
3186 /**
3187  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3188  * @phba: Pointer to HBA context object.
3189  * @cmdwqe: Pointer to driver command WQE object.
3190  * @rspwqe: Pointer to driver response WQE object.
3191  *
3192  * The function is called from SLI ring event handler with no
3193  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3194  * The function frees memory resources used for the NVME commands.
3195  **/
3196 static void
lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdwqe,struct lpfc_iocbq * rspwqe)3197 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3198 			    struct lpfc_iocbq *rspwqe)
3199 {
3200 	struct lpfc_async_xchg_ctx *ctxp;
3201 	struct lpfc_nvmet_tgtport *tgtp;
3202 	uint32_t result;
3203 	struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3204 
3205 	ctxp = cmdwqe->context_un.axchg;
3206 	result = wcqe->parameter;
3207 
3208 	if (phba->nvmet_support) {
3209 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3210 		atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3211 	}
3212 
3213 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3214 			"6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3215 			ctxp, wcqe->word0, wcqe->total_data_placed,
3216 			result, wcqe->word3);
3217 
3218 	if (!ctxp) {
3219 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3220 				"6415 NVMET LS Abort No ctx: WCQE: "
3221 				 "%08x %08x %08x %08x\n",
3222 				wcqe->word0, wcqe->total_data_placed,
3223 				result, wcqe->word3);
3224 
3225 		lpfc_sli_release_iocbq(phba, cmdwqe);
3226 		return;
3227 	}
3228 
3229 	if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3230 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3231 				"6416 NVMET LS abort cmpl state mismatch: "
3232 				"oxid x%x: %d %d\n",
3233 				ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3234 	}
3235 
3236 	cmdwqe->rsp_dmabuf = NULL;
3237 	cmdwqe->bpl_dmabuf = NULL;
3238 	lpfc_sli_release_iocbq(phba, cmdwqe);
3239 	kfree(ctxp);
3240 }
3241 
3242 static int
lpfc_nvmet_unsol_issue_abort(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp,uint32_t sid,uint16_t xri)3243 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3244 			     struct lpfc_async_xchg_ctx *ctxp,
3245 			     uint32_t sid, uint16_t xri)
3246 {
3247 	struct lpfc_nvmet_tgtport *tgtp = NULL;
3248 	struct lpfc_iocbq *abts_wqeq;
3249 	union lpfc_wqe128 *wqe_abts;
3250 	struct lpfc_nodelist *ndlp;
3251 
3252 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3253 			"6067 ABTS: sid %x xri x%x/x%x\n",
3254 			sid, xri, ctxp->wqeq->sli4_xritag);
3255 
3256 	if (phba->nvmet_support && phba->targetport)
3257 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3258 
3259 	ndlp = lpfc_findnode_did(phba->pport, sid);
3260 	if (!ndlp ||
3261 	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3262 	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3263 		if (tgtp)
3264 			atomic_inc(&tgtp->xmt_abort_rsp_error);
3265 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3266 				"6134 Drop ABTS - wrong NDLP state x%x.\n",
3267 				(ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3268 
3269 		/* No failure to an ABTS request. */
3270 		return 0;
3271 	}
3272 
3273 	abts_wqeq = ctxp->wqeq;
3274 	wqe_abts = &abts_wqeq->wqe;
3275 
3276 	/*
3277 	 * Since we zero the whole WQE, we need to ensure we set the WQE fields
3278 	 * that were initialized in lpfc_sli4_nvmet_alloc.
3279 	 */
3280 	memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3281 
3282 	/* Word 5 */
3283 	bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3284 	bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3285 	bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3286 	bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3287 	bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3288 
3289 	/* Word 6 */
3290 	bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3291 	       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3292 	bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3293 	       abts_wqeq->sli4_xritag);
3294 
3295 	/* Word 7 */
3296 	bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3297 	       CMD_XMIT_SEQUENCE64_WQE);
3298 	bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3299 	bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3300 	bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3301 
3302 	/* Word 8 */
3303 	wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3304 
3305 	/* Word 9 */
3306 	bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3307 	/* Needs to be set by caller */
3308 	bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3309 
3310 	/* Word 10 */
3311 	bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3312 	bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3313 	       LPFC_WQE_LENLOC_WORD12);
3314 	bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3315 	bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3316 
3317 	/* Word 11 */
3318 	bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3319 	       LPFC_WQE_CQ_ID_DEFAULT);
3320 	bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3321 	       OTHER_COMMAND);
3322 
3323 	abts_wqeq->vport = phba->pport;
3324 	abts_wqeq->ndlp = ndlp;
3325 	abts_wqeq->context_un.axchg = ctxp;
3326 	abts_wqeq->bpl_dmabuf = NULL;
3327 	abts_wqeq->num_bdes = 0;
3328 	/* hba_wqidx should already be setup from command we are aborting */
3329 	abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3330 	abts_wqeq->iocb.ulpLe = 1;
3331 
3332 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3333 			"6069 Issue ABTS to xri x%x reqtag x%x\n",
3334 			xri, abts_wqeq->iotag);
3335 	return 1;
3336 }
3337 
3338 static int
lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp,uint32_t sid,uint16_t xri)3339 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3340 			       struct lpfc_async_xchg_ctx *ctxp,
3341 			       uint32_t sid, uint16_t xri)
3342 {
3343 	struct lpfc_nvmet_tgtport *tgtp;
3344 	struct lpfc_iocbq *abts_wqeq;
3345 	struct lpfc_nodelist *ndlp;
3346 	unsigned long flags;
3347 	bool ia;
3348 	int rc;
3349 
3350 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3351 	if (!ctxp->wqeq) {
3352 		ctxp->wqeq = ctxp->ctxbuf->iocbq;
3353 		ctxp->wqeq->hba_wqidx = 0;
3354 	}
3355 
3356 	ndlp = lpfc_findnode_did(phba->pport, sid);
3357 	if (!ndlp ||
3358 	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3359 	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3360 		atomic_inc(&tgtp->xmt_abort_rsp_error);
3361 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3362 				"6160 Drop ABORT - wrong NDLP state x%x.\n",
3363 				(ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3364 
3365 		/* No failure to an ABTS request. */
3366 		spin_lock_irqsave(&ctxp->ctxlock, flags);
3367 		ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3368 		spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3369 		return 0;
3370 	}
3371 
3372 	/* Issue ABTS for this WQE based on iotag */
3373 	ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3374 	spin_lock_irqsave(&ctxp->ctxlock, flags);
3375 	if (!ctxp->abort_wqeq) {
3376 		atomic_inc(&tgtp->xmt_abort_rsp_error);
3377 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3378 				"6161 ABORT failed: No wqeqs: "
3379 				"xri: x%x\n", ctxp->oxid);
3380 		/* No failure to an ABTS request. */
3381 		ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3382 		spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3383 		return 0;
3384 	}
3385 	abts_wqeq = ctxp->abort_wqeq;
3386 	ctxp->state = LPFC_NVME_STE_ABORT;
3387 	ia = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? true : false;
3388 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3389 
3390 	/* Announce entry to new IO submit field. */
3391 	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3392 			"6162 ABORT Request to rport DID x%06x "
3393 			"for xri x%x x%x\n",
3394 			ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3395 
3396 	/* If the hba is getting reset, this flag is set.  It is
3397 	 * cleared when the reset is complete and rings reestablished.
3398 	 */
3399 	spin_lock_irqsave(&phba->hbalock, flags);
3400 	/* driver queued commands are in process of being flushed */
3401 	if (phba->hba_flag & HBA_IOQ_FLUSH) {
3402 		spin_unlock_irqrestore(&phba->hbalock, flags);
3403 		atomic_inc(&tgtp->xmt_abort_rsp_error);
3404 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3405 				"6163 Driver in reset cleanup - flushing "
3406 				"NVME Req now. hba_flag x%x oxid x%x\n",
3407 				phba->hba_flag, ctxp->oxid);
3408 		lpfc_sli_release_iocbq(phba, abts_wqeq);
3409 		spin_lock_irqsave(&ctxp->ctxlock, flags);
3410 		ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3411 		spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3412 		return 0;
3413 	}
3414 
3415 	/* Outstanding abort is in progress */
3416 	if (abts_wqeq->cmd_flag & LPFC_DRIVER_ABORTED) {
3417 		spin_unlock_irqrestore(&phba->hbalock, flags);
3418 		atomic_inc(&tgtp->xmt_abort_rsp_error);
3419 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3420 				"6164 Outstanding NVME I/O Abort Request "
3421 				"still pending on oxid x%x\n",
3422 				ctxp->oxid);
3423 		lpfc_sli_release_iocbq(phba, abts_wqeq);
3424 		spin_lock_irqsave(&ctxp->ctxlock, flags);
3425 		ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3426 		spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3427 		return 0;
3428 	}
3429 
3430 	/* Ready - mark outstanding as aborted by driver. */
3431 	abts_wqeq->cmd_flag |= LPFC_DRIVER_ABORTED;
3432 
3433 	lpfc_sli_prep_abort_xri(phba, abts_wqeq, ctxp->wqeq->sli4_xritag,
3434 				abts_wqeq->iotag, CLASS3,
3435 				LPFC_WQE_CQ_ID_DEFAULT, ia, true);
3436 
3437 	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
3438 	abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3439 	abts_wqeq->cmd_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3440 	abts_wqeq->cmd_flag |= LPFC_IO_NVME;
3441 	abts_wqeq->context_un.axchg = ctxp;
3442 	abts_wqeq->vport = phba->pport;
3443 	if (!ctxp->hdwq)
3444 		ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3445 
3446 	rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3447 	spin_unlock_irqrestore(&phba->hbalock, flags);
3448 	if (rc == WQE_SUCCESS) {
3449 		atomic_inc(&tgtp->xmt_abort_sol);
3450 		return 0;
3451 	}
3452 
3453 	atomic_inc(&tgtp->xmt_abort_rsp_error);
3454 	spin_lock_irqsave(&ctxp->ctxlock, flags);
3455 	ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3456 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3457 	lpfc_sli_release_iocbq(phba, abts_wqeq);
3458 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3459 			"6166 Failed ABORT issue_wqe with status x%x "
3460 			"for oxid x%x.\n",
3461 			rc, ctxp->oxid);
3462 	return 1;
3463 }
3464 
3465 static int
lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp,uint32_t sid,uint16_t xri)3466 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3467 				 struct lpfc_async_xchg_ctx *ctxp,
3468 				 uint32_t sid, uint16_t xri)
3469 {
3470 	struct lpfc_nvmet_tgtport *tgtp;
3471 	struct lpfc_iocbq *abts_wqeq;
3472 	unsigned long flags;
3473 	bool released = false;
3474 	int rc;
3475 
3476 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3477 	if (!ctxp->wqeq) {
3478 		ctxp->wqeq = ctxp->ctxbuf->iocbq;
3479 		ctxp->wqeq->hba_wqidx = 0;
3480 	}
3481 
3482 	if (ctxp->state == LPFC_NVME_STE_FREE) {
3483 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3484 				"6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3485 				ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3486 		rc = WQE_BUSY;
3487 		goto aerr;
3488 	}
3489 	ctxp->state = LPFC_NVME_STE_ABORT;
3490 	ctxp->entry_cnt++;
3491 	rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3492 	if (rc == 0)
3493 		goto aerr;
3494 
3495 	spin_lock_irqsave(&phba->hbalock, flags);
3496 	abts_wqeq = ctxp->wqeq;
3497 	abts_wqeq->cmd_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3498 	abts_wqeq->cmd_flag |= LPFC_IO_NVMET;
3499 	if (!ctxp->hdwq)
3500 		ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3501 
3502 	rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3503 	spin_unlock_irqrestore(&phba->hbalock, flags);
3504 	if (rc == WQE_SUCCESS) {
3505 		return 0;
3506 	}
3507 
3508 aerr:
3509 	spin_lock_irqsave(&ctxp->ctxlock, flags);
3510 	if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3511 		spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3512 		list_del_init(&ctxp->list);
3513 		spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3514 		released = true;
3515 	}
3516 	ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3517 	spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3518 
3519 	atomic_inc(&tgtp->xmt_abort_rsp_error);
3520 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3521 			"6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3522 			"(%x)\n",
3523 			ctxp->oxid, rc, released);
3524 	if (released)
3525 		lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3526 	return 1;
3527 }
3528 
3529 /**
3530  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3531  *        via async frame receive where the frame is not handled.
3532  * @phba: pointer to adapter structure
3533  * @ctxp: pointer to the asynchronously received received sequence
3534  * @sid: address of the remote port to send the ABTS to
3535  * @xri: oxid value to for the ABTS (other side's exchange id).
3536  **/
3537 int
lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba * phba,struct lpfc_async_xchg_ctx * ctxp,uint32_t sid,uint16_t xri)3538 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3539 				struct lpfc_async_xchg_ctx *ctxp,
3540 				uint32_t sid, uint16_t xri)
3541 {
3542 	struct lpfc_nvmet_tgtport *tgtp = NULL;
3543 	struct lpfc_iocbq *abts_wqeq;
3544 	unsigned long flags;
3545 	int rc;
3546 
3547 	if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3548 	    (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3549 		ctxp->state = LPFC_NVME_STE_LS_ABORT;
3550 		ctxp->entry_cnt++;
3551 	} else {
3552 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3553 				"6418 NVMET LS abort state mismatch "
3554 				"IO x%x: %d %d\n",
3555 				ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3556 		ctxp->state = LPFC_NVME_STE_LS_ABORT;
3557 	}
3558 
3559 	if (phba->nvmet_support && phba->targetport)
3560 		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3561 
3562 	if (!ctxp->wqeq) {
3563 		/* Issue ABTS for this WQE based on iotag */
3564 		ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3565 		if (!ctxp->wqeq) {
3566 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3567 					"6068 Abort failed: No wqeqs: "
3568 					"xri: x%x\n", xri);
3569 			/* No failure to an ABTS request. */
3570 			kfree(ctxp);
3571 			return 0;
3572 		}
3573 	}
3574 	abts_wqeq = ctxp->wqeq;
3575 
3576 	if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3577 		rc = WQE_BUSY;
3578 		goto out;
3579 	}
3580 
3581 	spin_lock_irqsave(&phba->hbalock, flags);
3582 	abts_wqeq->cmd_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3583 	abts_wqeq->cmd_flag |=  LPFC_IO_NVME_LS;
3584 	rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3585 	spin_unlock_irqrestore(&phba->hbalock, flags);
3586 	if (rc == WQE_SUCCESS) {
3587 		if (tgtp)
3588 			atomic_inc(&tgtp->xmt_abort_unsol);
3589 		return 0;
3590 	}
3591 out:
3592 	if (tgtp)
3593 		atomic_inc(&tgtp->xmt_abort_rsp_error);
3594 	abts_wqeq->rsp_dmabuf = NULL;
3595 	abts_wqeq->bpl_dmabuf = NULL;
3596 	lpfc_sli_release_iocbq(phba, abts_wqeq);
3597 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3598 			"6056 Failed to Issue ABTS. Status x%x\n", rc);
3599 	return 1;
3600 }
3601 
3602 /**
3603  * lpfc_nvmet_invalidate_host
3604  *
3605  * @phba: pointer to the driver instance bound to an adapter port.
3606  * @ndlp: pointer to an lpfc_nodelist type
3607  *
3608  * This routine upcalls the nvmet transport to invalidate an NVME
3609  * host to which this target instance had active connections.
3610  */
3611 void
lpfc_nvmet_invalidate_host(struct lpfc_hba * phba,struct lpfc_nodelist * ndlp)3612 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3613 {
3614 	u32 ndlp_has_hh;
3615 	struct lpfc_nvmet_tgtport *tgtp;
3616 
3617 	lpfc_printf_log(phba, KERN_INFO,
3618 			LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3619 			"6203 Invalidating hosthandle x%px\n",
3620 			ndlp);
3621 
3622 	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3623 	atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3624 
3625 	spin_lock_irq(&ndlp->lock);
3626 	ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3627 	spin_unlock_irq(&ndlp->lock);
3628 
3629 	/* Do not invalidate any nodes that do not have a hosthandle.
3630 	 * The host_release callbk will cause a node reference
3631 	 * count imbalance and a crash.
3632 	 */
3633 	if (!ndlp_has_hh) {
3634 		lpfc_printf_log(phba, KERN_INFO,
3635 				LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3636 				"6204 Skip invalidate on node x%px DID x%x\n",
3637 				ndlp, ndlp->nlp_DID);
3638 		return;
3639 	}
3640 
3641 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3642 	/* Need to get the nvmet_fc_target_port pointer here.*/
3643 	nvmet_fc_invalidate_host(phba->targetport, ndlp);
3644 #endif
3645 }
3646