1 /*
2  * Broadcom NetXtreme-E RoCE driver.
3  *
4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
6  *
7  * This software is available to you under a choice of one of two
8  * licenses.  You may choose to be licensed under the terms of the GNU
9  * General Public License (GPL) Version 2, available from the file
10  * COPYING in the main directory of this source tree, or the
11  * BSD license below:
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  *
17  * 1. Redistributions of source code must retain the above copyright
18  *    notice, this list of conditions and the following disclaimer.
19  * 2. Redistributions in binary form must reproduce the above copyright
20  *    notice, this list of conditions and the following disclaimer in
21  *    the documentation and/or other materials provided with the
22  *    distribution.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35  *
36  * Description: Fast Path Operators
37  */
38 
39 #define dev_fmt(fmt) "QPLIB: " fmt
40 
41 #include <linux/interrupt.h>
42 #include <linux/spinlock.h>
43 #include <linux/sched.h>
44 #include <linux/slab.h>
45 #include <linux/pci.h>
46 #include <linux/delay.h>
47 #include <linux/prefetch.h>
48 #include <linux/if_ether.h>
49 
50 #include "roce_hsi.h"
51 
52 #include "qplib_res.h"
53 #include "qplib_rcfw.h"
54 #include "qplib_sp.h"
55 #include "qplib_fp.h"
56 
57 static void __clean_cq(struct bnxt_qplib_cq *cq, u64 qp);
58 
59 static void bnxt_qplib_cancel_phantom_processing(struct bnxt_qplib_qp *qp)
60 {
61 	qp->sq.condition = false;
62 	qp->sq.send_phantom = false;
63 	qp->sq.single = false;
64 }
65 
66 /* Flush list */
67 static void __bnxt_qplib_add_flush_qp(struct bnxt_qplib_qp *qp)
68 {
69 	struct bnxt_qplib_cq *scq, *rcq;
70 
71 	scq = qp->scq;
72 	rcq = qp->rcq;
73 
74 	if (!qp->sq.flushed) {
75 		dev_dbg(&scq->hwq.pdev->dev,
76 			"FP: Adding to SQ Flush list = %p\n", qp);
77 		bnxt_qplib_cancel_phantom_processing(qp);
78 		list_add_tail(&qp->sq_flush, &scq->sqf_head);
79 		qp->sq.flushed = true;
80 	}
81 	if (!qp->srq) {
82 		if (!qp->rq.flushed) {
83 			dev_dbg(&rcq->hwq.pdev->dev,
84 				"FP: Adding to RQ Flush list = %p\n", qp);
85 			list_add_tail(&qp->rq_flush, &rcq->rqf_head);
86 			qp->rq.flushed = true;
87 		}
88 	}
89 }
90 
91 static void bnxt_qplib_acquire_cq_flush_locks(struct bnxt_qplib_qp *qp,
92 				       unsigned long *flags)
93 	__acquires(&qp->scq->flush_lock) __acquires(&qp->rcq->flush_lock)
94 {
95 	spin_lock_irqsave(&qp->scq->flush_lock, *flags);
96 	if (qp->scq == qp->rcq)
97 		__acquire(&qp->rcq->flush_lock);
98 	else
99 		spin_lock(&qp->rcq->flush_lock);
100 }
101 
102 static void bnxt_qplib_release_cq_flush_locks(struct bnxt_qplib_qp *qp,
103 				       unsigned long *flags)
104 	__releases(&qp->scq->flush_lock) __releases(&qp->rcq->flush_lock)
105 {
106 	if (qp->scq == qp->rcq)
107 		__release(&qp->rcq->flush_lock);
108 	else
109 		spin_unlock(&qp->rcq->flush_lock);
110 	spin_unlock_irqrestore(&qp->scq->flush_lock, *flags);
111 }
112 
113 void bnxt_qplib_add_flush_qp(struct bnxt_qplib_qp *qp)
114 {
115 	unsigned long flags;
116 
117 	bnxt_qplib_acquire_cq_flush_locks(qp, &flags);
118 	__bnxt_qplib_add_flush_qp(qp);
119 	bnxt_qplib_release_cq_flush_locks(qp, &flags);
120 }
121 
122 static void __bnxt_qplib_del_flush_qp(struct bnxt_qplib_qp *qp)
123 {
124 	if (qp->sq.flushed) {
125 		qp->sq.flushed = false;
126 		list_del(&qp->sq_flush);
127 	}
128 	if (!qp->srq) {
129 		if (qp->rq.flushed) {
130 			qp->rq.flushed = false;
131 			list_del(&qp->rq_flush);
132 		}
133 	}
134 }
135 
136 void bnxt_qplib_clean_qp(struct bnxt_qplib_qp *qp)
137 {
138 	unsigned long flags;
139 
140 	bnxt_qplib_acquire_cq_flush_locks(qp, &flags);
141 	__clean_cq(qp->scq, (u64)(unsigned long)qp);
142 	qp->sq.hwq.prod = 0;
143 	qp->sq.hwq.cons = 0;
144 	__clean_cq(qp->rcq, (u64)(unsigned long)qp);
145 	qp->rq.hwq.prod = 0;
146 	qp->rq.hwq.cons = 0;
147 
148 	__bnxt_qplib_del_flush_qp(qp);
149 	bnxt_qplib_release_cq_flush_locks(qp, &flags);
150 }
151 
152 static void bnxt_qpn_cqn_sched_task(struct work_struct *work)
153 {
154 	struct bnxt_qplib_nq_work *nq_work =
155 			container_of(work, struct bnxt_qplib_nq_work, work);
156 
157 	struct bnxt_qplib_cq *cq = nq_work->cq;
158 	struct bnxt_qplib_nq *nq = nq_work->nq;
159 
160 	if (cq && nq) {
161 		spin_lock_bh(&cq->compl_lock);
162 		if (atomic_read(&cq->arm_state) && nq->cqn_handler) {
163 			dev_dbg(&nq->pdev->dev,
164 				"%s:Trigger cq  = %p event nq = %p\n",
165 				__func__, cq, nq);
166 			nq->cqn_handler(nq, cq);
167 		}
168 		spin_unlock_bh(&cq->compl_lock);
169 	}
170 	kfree(nq_work);
171 }
172 
173 static void bnxt_qplib_free_qp_hdr_buf(struct bnxt_qplib_res *res,
174 				       struct bnxt_qplib_qp *qp)
175 {
176 	struct bnxt_qplib_q *rq = &qp->rq;
177 	struct bnxt_qplib_q *sq = &qp->sq;
178 
179 	if (qp->rq_hdr_buf)
180 		dma_free_coherent(&res->pdev->dev,
181 				  rq->max_wqe * qp->rq_hdr_buf_size,
182 				  qp->rq_hdr_buf, qp->rq_hdr_buf_map);
183 	if (qp->sq_hdr_buf)
184 		dma_free_coherent(&res->pdev->dev,
185 				  sq->max_wqe * qp->sq_hdr_buf_size,
186 				  qp->sq_hdr_buf, qp->sq_hdr_buf_map);
187 	qp->rq_hdr_buf = NULL;
188 	qp->sq_hdr_buf = NULL;
189 	qp->rq_hdr_buf_map = 0;
190 	qp->sq_hdr_buf_map = 0;
191 	qp->sq_hdr_buf_size = 0;
192 	qp->rq_hdr_buf_size = 0;
193 }
194 
195 static int bnxt_qplib_alloc_qp_hdr_buf(struct bnxt_qplib_res *res,
196 				       struct bnxt_qplib_qp *qp)
197 {
198 	struct bnxt_qplib_q *rq = &qp->rq;
199 	struct bnxt_qplib_q *sq = &qp->sq;
200 	int rc = 0;
201 
202 	if (qp->sq_hdr_buf_size && sq->max_wqe) {
203 		qp->sq_hdr_buf = dma_alloc_coherent(&res->pdev->dev,
204 					sq->max_wqe * qp->sq_hdr_buf_size,
205 					&qp->sq_hdr_buf_map, GFP_KERNEL);
206 		if (!qp->sq_hdr_buf) {
207 			rc = -ENOMEM;
208 			dev_err(&res->pdev->dev,
209 				"Failed to create sq_hdr_buf\n");
210 			goto fail;
211 		}
212 	}
213 
214 	if (qp->rq_hdr_buf_size && rq->max_wqe) {
215 		qp->rq_hdr_buf = dma_alloc_coherent(&res->pdev->dev,
216 						    rq->max_wqe *
217 						    qp->rq_hdr_buf_size,
218 						    &qp->rq_hdr_buf_map,
219 						    GFP_KERNEL);
220 		if (!qp->rq_hdr_buf) {
221 			rc = -ENOMEM;
222 			dev_err(&res->pdev->dev,
223 				"Failed to create rq_hdr_buf\n");
224 			goto fail;
225 		}
226 	}
227 	return 0;
228 
229 fail:
230 	bnxt_qplib_free_qp_hdr_buf(res, qp);
231 	return rc;
232 }
233 
234 static void clean_nq(struct bnxt_qplib_nq *nq, struct bnxt_qplib_cq *cq)
235 {
236 	struct bnxt_qplib_hwq *hwq = &nq->hwq;
237 	struct nq_base *nqe, **nq_ptr;
238 	int budget = nq->budget;
239 	u32 sw_cons, raw_cons;
240 	uintptr_t q_handle;
241 	u16 type;
242 
243 	spin_lock_bh(&hwq->lock);
244 	/* Service the NQ until empty */
245 	raw_cons = hwq->cons;
246 	while (budget--) {
247 		sw_cons = HWQ_CMP(raw_cons, hwq);
248 		nq_ptr = (struct nq_base **)hwq->pbl_ptr;
249 		nqe = &nq_ptr[NQE_PG(sw_cons)][NQE_IDX(sw_cons)];
250 		if (!NQE_CMP_VALID(nqe, raw_cons, hwq->max_elements))
251 			break;
252 
253 		/*
254 		 * The valid test of the entry must be done first before
255 		 * reading any further.
256 		 */
257 		dma_rmb();
258 
259 		type = le16_to_cpu(nqe->info10_type) & NQ_BASE_TYPE_MASK;
260 		switch (type) {
261 		case NQ_BASE_TYPE_CQ_NOTIFICATION:
262 		{
263 			struct nq_cn *nqcne = (struct nq_cn *)nqe;
264 
265 			q_handle = le32_to_cpu(nqcne->cq_handle_low);
266 			q_handle |= (u64)le32_to_cpu(nqcne->cq_handle_high)
267 						     << 32;
268 			if ((unsigned long)cq == q_handle) {
269 				nqcne->cq_handle_low = 0;
270 				nqcne->cq_handle_high = 0;
271 				cq->cnq_events++;
272 			}
273 			break;
274 		}
275 		default:
276 			break;
277 		}
278 		raw_cons++;
279 	}
280 	spin_unlock_bh(&hwq->lock);
281 }
282 
283 /* Wait for receiving all NQEs for this CQ and clean the NQEs associated with
284  * this CQ.
285  */
286 static void __wait_for_all_nqes(struct bnxt_qplib_cq *cq, u16 cnq_events)
287 {
288 	u32 retry_cnt = 100;
289 
290 	while (retry_cnt--) {
291 		if (cnq_events == cq->cnq_events)
292 			return;
293 		usleep_range(50, 100);
294 		clean_nq(cq->nq, cq);
295 	}
296 }
297 
298 static void bnxt_qplib_service_nq(struct tasklet_struct *t)
299 {
300 	struct bnxt_qplib_nq *nq = from_tasklet(nq, t, nq_tasklet);
301 	struct bnxt_qplib_hwq *hwq = &nq->hwq;
302 	int num_srqne_processed = 0;
303 	int num_cqne_processed = 0;
304 	struct bnxt_qplib_cq *cq;
305 	int budget = nq->budget;
306 	u32 sw_cons, raw_cons;
307 	struct nq_base *nqe;
308 	uintptr_t q_handle;
309 	u16 type;
310 
311 	spin_lock_bh(&hwq->lock);
312 	/* Service the NQ until empty */
313 	raw_cons = hwq->cons;
314 	while (budget--) {
315 		sw_cons = HWQ_CMP(raw_cons, hwq);
316 		nqe = bnxt_qplib_get_qe(hwq, sw_cons, NULL);
317 		if (!NQE_CMP_VALID(nqe, raw_cons, hwq->max_elements))
318 			break;
319 
320 		/*
321 		 * The valid test of the entry must be done first before
322 		 * reading any further.
323 		 */
324 		dma_rmb();
325 
326 		type = le16_to_cpu(nqe->info10_type) & NQ_BASE_TYPE_MASK;
327 		switch (type) {
328 		case NQ_BASE_TYPE_CQ_NOTIFICATION:
329 		{
330 			struct nq_cn *nqcne = (struct nq_cn *)nqe;
331 
332 			q_handle = le32_to_cpu(nqcne->cq_handle_low);
333 			q_handle |= (u64)le32_to_cpu(nqcne->cq_handle_high)
334 						     << 32;
335 			cq = (struct bnxt_qplib_cq *)(unsigned long)q_handle;
336 			if (!cq)
337 				break;
338 			bnxt_qplib_armen_db(&cq->dbinfo,
339 					    DBC_DBC_TYPE_CQ_ARMENA);
340 			spin_lock_bh(&cq->compl_lock);
341 			atomic_set(&cq->arm_state, 0);
342 			if (!nq->cqn_handler(nq, (cq)))
343 				num_cqne_processed++;
344 			else
345 				dev_warn(&nq->pdev->dev,
346 					 "cqn - type 0x%x not handled\n", type);
347 			cq->cnq_events++;
348 			spin_unlock_bh(&cq->compl_lock);
349 			break;
350 		}
351 		case NQ_BASE_TYPE_SRQ_EVENT:
352 		{
353 			struct bnxt_qplib_srq *srq;
354 			struct nq_srq_event *nqsrqe =
355 						(struct nq_srq_event *)nqe;
356 
357 			q_handle = le32_to_cpu(nqsrqe->srq_handle_low);
358 			q_handle |= (u64)le32_to_cpu(nqsrqe->srq_handle_high)
359 				     << 32;
360 			srq = (struct bnxt_qplib_srq *)q_handle;
361 			bnxt_qplib_armen_db(&srq->dbinfo,
362 					    DBC_DBC_TYPE_SRQ_ARMENA);
363 			if (!nq->srqn_handler(nq,
364 					      (struct bnxt_qplib_srq *)q_handle,
365 					      nqsrqe->event))
366 				num_srqne_processed++;
367 			else
368 				dev_warn(&nq->pdev->dev,
369 					 "SRQ event 0x%x not handled\n",
370 					 nqsrqe->event);
371 			break;
372 		}
373 		case NQ_BASE_TYPE_DBQ_EVENT:
374 			break;
375 		default:
376 			dev_warn(&nq->pdev->dev,
377 				 "nqe with type = 0x%x not handled\n", type);
378 			break;
379 		}
380 		raw_cons++;
381 	}
382 	if (hwq->cons != raw_cons) {
383 		hwq->cons = raw_cons;
384 		bnxt_qplib_ring_nq_db(&nq->nq_db.dbinfo, nq->res->cctx, true);
385 	}
386 	spin_unlock_bh(&hwq->lock);
387 }
388 
389 static irqreturn_t bnxt_qplib_nq_irq(int irq, void *dev_instance)
390 {
391 	struct bnxt_qplib_nq *nq = dev_instance;
392 	struct bnxt_qplib_hwq *hwq = &nq->hwq;
393 	u32 sw_cons;
394 
395 	/* Prefetch the NQ element */
396 	sw_cons = HWQ_CMP(hwq->cons, hwq);
397 	prefetch(bnxt_qplib_get_qe(hwq, sw_cons, NULL));
398 
399 	/* Fan out to CPU affinitized kthreads? */
400 	tasklet_schedule(&nq->nq_tasklet);
401 
402 	return IRQ_HANDLED;
403 }
404 
405 void bnxt_qplib_nq_stop_irq(struct bnxt_qplib_nq *nq, bool kill)
406 {
407 	tasklet_disable(&nq->nq_tasklet);
408 	/* Mask h/w interrupt */
409 	bnxt_qplib_ring_nq_db(&nq->nq_db.dbinfo, nq->res->cctx, false);
410 	/* Sync with last running IRQ handler */
411 	synchronize_irq(nq->msix_vec);
412 	if (kill)
413 		tasklet_kill(&nq->nq_tasklet);
414 	if (nq->requested) {
415 		irq_set_affinity_hint(nq->msix_vec, NULL);
416 		free_irq(nq->msix_vec, nq);
417 		nq->requested = false;
418 	}
419 }
420 
421 void bnxt_qplib_disable_nq(struct bnxt_qplib_nq *nq)
422 {
423 	if (nq->cqn_wq) {
424 		destroy_workqueue(nq->cqn_wq);
425 		nq->cqn_wq = NULL;
426 	}
427 
428 	/* Make sure the HW is stopped! */
429 	bnxt_qplib_nq_stop_irq(nq, true);
430 
431 	if (nq->nq_db.reg.bar_reg) {
432 		iounmap(nq->nq_db.reg.bar_reg);
433 		nq->nq_db.reg.bar_reg = NULL;
434 	}
435 
436 	nq->cqn_handler = NULL;
437 	nq->srqn_handler = NULL;
438 	nq->msix_vec = 0;
439 }
440 
441 int bnxt_qplib_nq_start_irq(struct bnxt_qplib_nq *nq, int nq_indx,
442 			    int msix_vector, bool need_init)
443 {
444 	int rc;
445 
446 	if (nq->requested)
447 		return -EFAULT;
448 
449 	nq->msix_vec = msix_vector;
450 	if (need_init)
451 		tasklet_setup(&nq->nq_tasklet, bnxt_qplib_service_nq);
452 	else
453 		tasklet_enable(&nq->nq_tasklet);
454 
455 	snprintf(nq->name, sizeof(nq->name), "bnxt_qplib_nq-%d", nq_indx);
456 	rc = request_irq(nq->msix_vec, bnxt_qplib_nq_irq, 0, nq->name, nq);
457 	if (rc)
458 		return rc;
459 
460 	cpumask_clear(&nq->mask);
461 	cpumask_set_cpu(nq_indx, &nq->mask);
462 	rc = irq_set_affinity_hint(nq->msix_vec, &nq->mask);
463 	if (rc) {
464 		dev_warn(&nq->pdev->dev,
465 			 "set affinity failed; vector: %d nq_idx: %d\n",
466 			 nq->msix_vec, nq_indx);
467 	}
468 	nq->requested = true;
469 	bnxt_qplib_ring_nq_db(&nq->nq_db.dbinfo, nq->res->cctx, true);
470 
471 	return rc;
472 }
473 
474 static int bnxt_qplib_map_nq_db(struct bnxt_qplib_nq *nq,  u32 reg_offt)
475 {
476 	resource_size_t reg_base;
477 	struct bnxt_qplib_nq_db *nq_db;
478 	struct pci_dev *pdev;
479 	int rc = 0;
480 
481 	pdev = nq->pdev;
482 	nq_db = &nq->nq_db;
483 
484 	nq_db->reg.bar_id = NQ_CONS_PCI_BAR_REGION;
485 	nq_db->reg.bar_base = pci_resource_start(pdev, nq_db->reg.bar_id);
486 	if (!nq_db->reg.bar_base) {
487 		dev_err(&pdev->dev, "QPLIB: NQ BAR region %d resc start is 0!",
488 			nq_db->reg.bar_id);
489 		rc = -ENOMEM;
490 		goto fail;
491 	}
492 
493 	reg_base = nq_db->reg.bar_base + reg_offt;
494 	/* Unconditionally map 8 bytes to support 57500 series */
495 	nq_db->reg.len = 8;
496 	nq_db->reg.bar_reg = ioremap(reg_base, nq_db->reg.len);
497 	if (!nq_db->reg.bar_reg) {
498 		dev_err(&pdev->dev, "QPLIB: NQ BAR region %d mapping failed",
499 			nq_db->reg.bar_id);
500 		rc = -ENOMEM;
501 		goto fail;
502 	}
503 
504 	nq_db->dbinfo.db = nq_db->reg.bar_reg;
505 	nq_db->dbinfo.hwq = &nq->hwq;
506 	nq_db->dbinfo.xid = nq->ring_id;
507 fail:
508 	return rc;
509 }
510 
511 int bnxt_qplib_enable_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq,
512 			 int nq_idx, int msix_vector, int bar_reg_offset,
513 			 cqn_handler_t cqn_handler,
514 			 srqn_handler_t srqn_handler)
515 {
516 	int rc = -1;
517 
518 	nq->pdev = pdev;
519 	nq->cqn_handler = cqn_handler;
520 	nq->srqn_handler = srqn_handler;
521 
522 	/* Have a task to schedule CQ notifiers in post send case */
523 	nq->cqn_wq  = create_singlethread_workqueue("bnxt_qplib_nq");
524 	if (!nq->cqn_wq)
525 		return -ENOMEM;
526 
527 	rc = bnxt_qplib_map_nq_db(nq, bar_reg_offset);
528 	if (rc)
529 		goto fail;
530 
531 	rc = bnxt_qplib_nq_start_irq(nq, nq_idx, msix_vector, true);
532 	if (rc) {
533 		dev_err(&nq->pdev->dev,
534 			"Failed to request irq for nq-idx %d\n", nq_idx);
535 		goto fail;
536 	}
537 
538 	return 0;
539 fail:
540 	bnxt_qplib_disable_nq(nq);
541 	return rc;
542 }
543 
544 void bnxt_qplib_free_nq(struct bnxt_qplib_nq *nq)
545 {
546 	if (nq->hwq.max_elements) {
547 		bnxt_qplib_free_hwq(nq->res, &nq->hwq);
548 		nq->hwq.max_elements = 0;
549 	}
550 }
551 
552 int bnxt_qplib_alloc_nq(struct bnxt_qplib_res *res, struct bnxt_qplib_nq *nq)
553 {
554 	struct bnxt_qplib_hwq_attr hwq_attr = {};
555 	struct bnxt_qplib_sg_info sginfo = {};
556 
557 	nq->pdev = res->pdev;
558 	nq->res = res;
559 	if (!nq->hwq.max_elements ||
560 	    nq->hwq.max_elements > BNXT_QPLIB_NQE_MAX_CNT)
561 		nq->hwq.max_elements = BNXT_QPLIB_NQE_MAX_CNT;
562 
563 	sginfo.pgsize = PAGE_SIZE;
564 	sginfo.pgshft = PAGE_SHIFT;
565 	hwq_attr.res = res;
566 	hwq_attr.sginfo = &sginfo;
567 	hwq_attr.depth = nq->hwq.max_elements;
568 	hwq_attr.stride = sizeof(struct nq_base);
569 	hwq_attr.type = bnxt_qplib_get_hwq_type(nq->res);
570 	if (bnxt_qplib_alloc_init_hwq(&nq->hwq, &hwq_attr)) {
571 		dev_err(&nq->pdev->dev, "FP NQ allocation failed");
572 		return -ENOMEM;
573 	}
574 	nq->budget = 8;
575 	return 0;
576 }
577 
578 /* SRQ */
579 void bnxt_qplib_destroy_srq(struct bnxt_qplib_res *res,
580 			   struct bnxt_qplib_srq *srq)
581 {
582 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
583 	struct cmdq_destroy_srq req;
584 	struct creq_destroy_srq_resp resp;
585 	u16 cmd_flags = 0;
586 	int rc;
587 
588 	RCFW_CMD_PREP(req, DESTROY_SRQ, cmd_flags);
589 
590 	/* Configure the request */
591 	req.srq_cid = cpu_to_le32(srq->id);
592 
593 	rc = bnxt_qplib_rcfw_send_message(rcfw, (struct cmdq_base *)&req,
594 					  (struct creq_base *)&resp, NULL, 0);
595 	kfree(srq->swq);
596 	if (rc)
597 		return;
598 	bnxt_qplib_free_hwq(res, &srq->hwq);
599 }
600 
601 int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
602 			  struct bnxt_qplib_srq *srq)
603 {
604 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
605 	struct bnxt_qplib_hwq_attr hwq_attr = {};
606 	struct creq_create_srq_resp resp;
607 	struct cmdq_create_srq req;
608 	struct bnxt_qplib_pbl *pbl;
609 	u16 cmd_flags = 0;
610 	u16 pg_sz_lvl;
611 	int rc, idx;
612 
613 	hwq_attr.res = res;
614 	hwq_attr.sginfo = &srq->sg_info;
615 	hwq_attr.depth = srq->max_wqe;
616 	hwq_attr.stride = srq->wqe_size;
617 	hwq_attr.type = HWQ_TYPE_QUEUE;
618 	rc = bnxt_qplib_alloc_init_hwq(&srq->hwq, &hwq_attr);
619 	if (rc)
620 		goto exit;
621 
622 	srq->swq = kcalloc(srq->hwq.max_elements, sizeof(*srq->swq),
623 			   GFP_KERNEL);
624 	if (!srq->swq) {
625 		rc = -ENOMEM;
626 		goto fail;
627 	}
628 
629 	RCFW_CMD_PREP(req, CREATE_SRQ, cmd_flags);
630 
631 	/* Configure the request */
632 	req.dpi = cpu_to_le32(srq->dpi->dpi);
633 	req.srq_handle = cpu_to_le64((uintptr_t)srq);
634 
635 	req.srq_size = cpu_to_le16((u16)srq->hwq.max_elements);
636 	pbl = &srq->hwq.pbl[PBL_LVL_0];
637 	pg_sz_lvl = ((u16)bnxt_qplib_base_pg_size(&srq->hwq) <<
638 		     CMDQ_CREATE_SRQ_PG_SIZE_SFT);
639 	pg_sz_lvl |= (srq->hwq.level & CMDQ_CREATE_SRQ_LVL_MASK) <<
640 		      CMDQ_CREATE_SRQ_LVL_SFT;
641 	req.pg_size_lvl = cpu_to_le16(pg_sz_lvl);
642 	req.pbl = cpu_to_le64(pbl->pg_map_arr[0]);
643 	req.pd_id = cpu_to_le32(srq->pd->id);
644 	req.eventq_id = cpu_to_le16(srq->eventq_hw_ring_id);
645 
646 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
647 					  (void *)&resp, NULL, 0);
648 	if (rc)
649 		goto fail;
650 
651 	spin_lock_init(&srq->lock);
652 	srq->start_idx = 0;
653 	srq->last_idx = srq->hwq.max_elements - 1;
654 	for (idx = 0; idx < srq->hwq.max_elements; idx++)
655 		srq->swq[idx].next_idx = idx + 1;
656 	srq->swq[srq->last_idx].next_idx = -1;
657 
658 	srq->id = le32_to_cpu(resp.xid);
659 	srq->dbinfo.hwq = &srq->hwq;
660 	srq->dbinfo.xid = srq->id;
661 	srq->dbinfo.db = srq->dpi->dbr;
662 	srq->dbinfo.max_slot = 1;
663 	srq->dbinfo.priv_db = res->dpi_tbl.dbr_bar_reg_iomem;
664 	if (srq->threshold)
665 		bnxt_qplib_armen_db(&srq->dbinfo, DBC_DBC_TYPE_SRQ_ARMENA);
666 	srq->arm_req = false;
667 
668 	return 0;
669 fail:
670 	bnxt_qplib_free_hwq(res, &srq->hwq);
671 	kfree(srq->swq);
672 exit:
673 	return rc;
674 }
675 
676 int bnxt_qplib_modify_srq(struct bnxt_qplib_res *res,
677 			  struct bnxt_qplib_srq *srq)
678 {
679 	struct bnxt_qplib_hwq *srq_hwq = &srq->hwq;
680 	u32 sw_prod, sw_cons, count = 0;
681 
682 	sw_prod = HWQ_CMP(srq_hwq->prod, srq_hwq);
683 	sw_cons = HWQ_CMP(srq_hwq->cons, srq_hwq);
684 
685 	count = sw_prod > sw_cons ? sw_prod - sw_cons :
686 				    srq_hwq->max_elements - sw_cons + sw_prod;
687 	if (count > srq->threshold) {
688 		srq->arm_req = false;
689 		bnxt_qplib_srq_arm_db(&srq->dbinfo, srq->threshold);
690 	} else {
691 		/* Deferred arming */
692 		srq->arm_req = true;
693 	}
694 
695 	return 0;
696 }
697 
698 int bnxt_qplib_query_srq(struct bnxt_qplib_res *res,
699 			 struct bnxt_qplib_srq *srq)
700 {
701 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
702 	struct cmdq_query_srq req;
703 	struct creq_query_srq_resp resp;
704 	struct bnxt_qplib_rcfw_sbuf *sbuf;
705 	struct creq_query_srq_resp_sb *sb;
706 	u16 cmd_flags = 0;
707 	int rc = 0;
708 
709 	RCFW_CMD_PREP(req, QUERY_SRQ, cmd_flags);
710 	req.srq_cid = cpu_to_le32(srq->id);
711 
712 	/* Configure the request */
713 	sbuf = bnxt_qplib_rcfw_alloc_sbuf(rcfw, sizeof(*sb));
714 	if (!sbuf)
715 		return -ENOMEM;
716 	sb = sbuf->sb;
717 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp,
718 					  (void *)sbuf, 0);
719 	srq->threshold = le16_to_cpu(sb->srq_limit);
720 	bnxt_qplib_rcfw_free_sbuf(rcfw, sbuf);
721 
722 	return rc;
723 }
724 
725 int bnxt_qplib_post_srq_recv(struct bnxt_qplib_srq *srq,
726 			     struct bnxt_qplib_swqe *wqe)
727 {
728 	struct bnxt_qplib_hwq *srq_hwq = &srq->hwq;
729 	struct rq_wqe *srqe;
730 	struct sq_sge *hw_sge;
731 	u32 sw_prod, sw_cons, count = 0;
732 	int i, rc = 0, next;
733 
734 	spin_lock(&srq_hwq->lock);
735 	if (srq->start_idx == srq->last_idx) {
736 		dev_err(&srq_hwq->pdev->dev,
737 			"FP: SRQ (0x%x) is full!\n", srq->id);
738 		rc = -EINVAL;
739 		spin_unlock(&srq_hwq->lock);
740 		goto done;
741 	}
742 	next = srq->start_idx;
743 	srq->start_idx = srq->swq[next].next_idx;
744 	spin_unlock(&srq_hwq->lock);
745 
746 	sw_prod = HWQ_CMP(srq_hwq->prod, srq_hwq);
747 	srqe = bnxt_qplib_get_qe(srq_hwq, sw_prod, NULL);
748 	memset(srqe, 0, srq->wqe_size);
749 	/* Calculate wqe_size16 and data_len */
750 	for (i = 0, hw_sge = (struct sq_sge *)srqe->data;
751 	     i < wqe->num_sge; i++, hw_sge++) {
752 		hw_sge->va_or_pa = cpu_to_le64(wqe->sg_list[i].addr);
753 		hw_sge->l_key = cpu_to_le32(wqe->sg_list[i].lkey);
754 		hw_sge->size = cpu_to_le32(wqe->sg_list[i].size);
755 	}
756 	srqe->wqe_type = wqe->type;
757 	srqe->flags = wqe->flags;
758 	srqe->wqe_size = wqe->num_sge +
759 			((offsetof(typeof(*srqe), data) + 15) >> 4);
760 	srqe->wr_id[0] = cpu_to_le32((u32)next);
761 	srq->swq[next].wr_id = wqe->wr_id;
762 
763 	srq_hwq->prod++;
764 
765 	spin_lock(&srq_hwq->lock);
766 	sw_prod = HWQ_CMP(srq_hwq->prod, srq_hwq);
767 	/* retaining srq_hwq->cons for this logic
768 	 * actually the lock is only required to
769 	 * read srq_hwq->cons.
770 	 */
771 	sw_cons = HWQ_CMP(srq_hwq->cons, srq_hwq);
772 	count = sw_prod > sw_cons ? sw_prod - sw_cons :
773 				    srq_hwq->max_elements - sw_cons + sw_prod;
774 	spin_unlock(&srq_hwq->lock);
775 	/* Ring DB */
776 	bnxt_qplib_ring_prod_db(&srq->dbinfo, DBC_DBC_TYPE_SRQ);
777 	if (srq->arm_req == true && count > srq->threshold) {
778 		srq->arm_req = false;
779 		bnxt_qplib_srq_arm_db(&srq->dbinfo, srq->threshold);
780 	}
781 done:
782 	return rc;
783 }
784 
785 /* QP */
786 
787 static int bnxt_qplib_alloc_init_swq(struct bnxt_qplib_q *que)
788 {
789 	int rc = 0;
790 	int indx;
791 
792 	que->swq = kcalloc(que->max_wqe, sizeof(*que->swq), GFP_KERNEL);
793 	if (!que->swq) {
794 		rc = -ENOMEM;
795 		goto out;
796 	}
797 
798 	que->swq_start = 0;
799 	que->swq_last = que->max_wqe - 1;
800 	for (indx = 0; indx < que->max_wqe; indx++)
801 		que->swq[indx].next_idx = indx + 1;
802 	que->swq[que->swq_last].next_idx = 0; /* Make it circular */
803 	que->swq_last = 0;
804 out:
805 	return rc;
806 }
807 
808 int bnxt_qplib_create_qp1(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
809 {
810 	struct bnxt_qplib_hwq_attr hwq_attr = {};
811 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
812 	struct bnxt_qplib_q *sq = &qp->sq;
813 	struct bnxt_qplib_q *rq = &qp->rq;
814 	struct creq_create_qp1_resp resp;
815 	struct cmdq_create_qp1 req;
816 	struct bnxt_qplib_pbl *pbl;
817 	u16 cmd_flags = 0;
818 	u32 qp_flags = 0;
819 	u8 pg_sz_lvl;
820 	u32 tbl_indx;
821 	int rc;
822 
823 	RCFW_CMD_PREP(req, CREATE_QP1, cmd_flags);
824 
825 	/* General */
826 	req.type = qp->type;
827 	req.dpi = cpu_to_le32(qp->dpi->dpi);
828 	req.qp_handle = cpu_to_le64(qp->qp_handle);
829 
830 	/* SQ */
831 	hwq_attr.res = res;
832 	hwq_attr.sginfo = &sq->sg_info;
833 	hwq_attr.stride = sizeof(struct sq_sge);
834 	hwq_attr.depth = bnxt_qplib_get_depth(sq);
835 	hwq_attr.type = HWQ_TYPE_QUEUE;
836 	rc = bnxt_qplib_alloc_init_hwq(&sq->hwq, &hwq_attr);
837 	if (rc)
838 		goto exit;
839 
840 	rc = bnxt_qplib_alloc_init_swq(sq);
841 	if (rc)
842 		goto fail_sq;
843 
844 	req.sq_size = cpu_to_le32(bnxt_qplib_set_sq_size(sq, qp->wqe_mode));
845 	pbl = &sq->hwq.pbl[PBL_LVL_0];
846 	req.sq_pbl = cpu_to_le64(pbl->pg_map_arr[0]);
847 	pg_sz_lvl = (bnxt_qplib_base_pg_size(&sq->hwq) <<
848 		     CMDQ_CREATE_QP1_SQ_PG_SIZE_SFT);
849 	pg_sz_lvl |= (sq->hwq.level & CMDQ_CREATE_QP1_SQ_LVL_MASK);
850 	req.sq_pg_size_sq_lvl = pg_sz_lvl;
851 	req.sq_fwo_sq_sge =
852 		cpu_to_le16((sq->max_sge & CMDQ_CREATE_QP1_SQ_SGE_MASK) <<
853 			     CMDQ_CREATE_QP1_SQ_SGE_SFT);
854 	req.scq_cid = cpu_to_le32(qp->scq->id);
855 
856 	/* RQ */
857 	if (rq->max_wqe) {
858 		hwq_attr.res = res;
859 		hwq_attr.sginfo = &rq->sg_info;
860 		hwq_attr.stride = sizeof(struct sq_sge);
861 		hwq_attr.depth = bnxt_qplib_get_depth(rq);
862 		hwq_attr.type = HWQ_TYPE_QUEUE;
863 		rc = bnxt_qplib_alloc_init_hwq(&rq->hwq, &hwq_attr);
864 		if (rc)
865 			goto sq_swq;
866 		rc = bnxt_qplib_alloc_init_swq(rq);
867 		if (rc)
868 			goto fail_rq;
869 		req.rq_size = cpu_to_le32(rq->max_wqe);
870 		pbl = &rq->hwq.pbl[PBL_LVL_0];
871 		req.rq_pbl = cpu_to_le64(pbl->pg_map_arr[0]);
872 		pg_sz_lvl = (bnxt_qplib_base_pg_size(&rq->hwq) <<
873 			     CMDQ_CREATE_QP1_RQ_PG_SIZE_SFT);
874 		pg_sz_lvl |= (rq->hwq.level & CMDQ_CREATE_QP1_RQ_LVL_MASK);
875 		req.rq_pg_size_rq_lvl = pg_sz_lvl;
876 		req.rq_fwo_rq_sge =
877 			cpu_to_le16((rq->max_sge &
878 				     CMDQ_CREATE_QP1_RQ_SGE_MASK) <<
879 				    CMDQ_CREATE_QP1_RQ_SGE_SFT);
880 	}
881 	req.rcq_cid = cpu_to_le32(qp->rcq->id);
882 	/* Header buffer - allow hdr_buf pass in */
883 	rc = bnxt_qplib_alloc_qp_hdr_buf(res, qp);
884 	if (rc) {
885 		rc = -ENOMEM;
886 		goto rq_rwq;
887 	}
888 	qp_flags |= CMDQ_CREATE_QP1_QP_FLAGS_RESERVED_LKEY_ENABLE;
889 	req.qp_flags = cpu_to_le32(qp_flags);
890 	req.pd_id = cpu_to_le32(qp->pd->id);
891 
892 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
893 					  (void *)&resp, NULL, 0);
894 	if (rc)
895 		goto fail;
896 
897 	qp->id = le32_to_cpu(resp.xid);
898 	qp->cur_qp_state = CMDQ_MODIFY_QP_NEW_STATE_RESET;
899 	qp->cctx = res->cctx;
900 	sq->dbinfo.hwq = &sq->hwq;
901 	sq->dbinfo.xid = qp->id;
902 	sq->dbinfo.db = qp->dpi->dbr;
903 	sq->dbinfo.max_slot = bnxt_qplib_set_sq_max_slot(qp->wqe_mode);
904 	if (rq->max_wqe) {
905 		rq->dbinfo.hwq = &rq->hwq;
906 		rq->dbinfo.xid = qp->id;
907 		rq->dbinfo.db = qp->dpi->dbr;
908 		rq->dbinfo.max_slot = bnxt_qplib_set_rq_max_slot(rq->wqe_size);
909 	}
910 	tbl_indx = map_qp_id_to_tbl_indx(qp->id, rcfw);
911 	rcfw->qp_tbl[tbl_indx].qp_id = qp->id;
912 	rcfw->qp_tbl[tbl_indx].qp_handle = (void *)qp;
913 
914 	return 0;
915 
916 fail:
917 	bnxt_qplib_free_qp_hdr_buf(res, qp);
918 rq_rwq:
919 	kfree(rq->swq);
920 fail_rq:
921 	bnxt_qplib_free_hwq(res, &rq->hwq);
922 sq_swq:
923 	kfree(sq->swq);
924 fail_sq:
925 	bnxt_qplib_free_hwq(res, &sq->hwq);
926 exit:
927 	return rc;
928 }
929 
930 static void bnxt_qplib_init_psn_ptr(struct bnxt_qplib_qp *qp, int size)
931 {
932 	struct bnxt_qplib_hwq *hwq;
933 	struct bnxt_qplib_q *sq;
934 	u64 fpsne, psn_pg;
935 	u16 indx_pad = 0;
936 
937 	sq = &qp->sq;
938 	hwq = &sq->hwq;
939 	/* First psn entry */
940 	fpsne = (u64)bnxt_qplib_get_qe(hwq, hwq->depth, &psn_pg);
941 	if (!IS_ALIGNED(fpsne, PAGE_SIZE))
942 		indx_pad = (fpsne & ~PAGE_MASK) / size;
943 	hwq->pad_pgofft = indx_pad;
944 	hwq->pad_pg = (u64 *)psn_pg;
945 	hwq->pad_stride = size;
946 }
947 
948 int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
949 {
950 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
951 	struct bnxt_qplib_hwq_attr hwq_attr = {};
952 	struct bnxt_qplib_sg_info sginfo = {};
953 	struct bnxt_qplib_q *sq = &qp->sq;
954 	struct bnxt_qplib_q *rq = &qp->rq;
955 	struct creq_create_qp_resp resp;
956 	int rc, req_size, psn_sz = 0;
957 	struct bnxt_qplib_hwq *xrrq;
958 	struct bnxt_qplib_pbl *pbl;
959 	struct cmdq_create_qp req;
960 	u16 cmd_flags = 0;
961 	u32 qp_flags = 0;
962 	u8 pg_sz_lvl;
963 	u32 tbl_indx;
964 	u16 nsge;
965 
966 	RCFW_CMD_PREP(req, CREATE_QP, cmd_flags);
967 
968 	/* General */
969 	req.type = qp->type;
970 	req.dpi = cpu_to_le32(qp->dpi->dpi);
971 	req.qp_handle = cpu_to_le64(qp->qp_handle);
972 
973 	/* SQ */
974 	if (qp->type == CMDQ_CREATE_QP_TYPE_RC) {
975 		psn_sz = bnxt_qplib_is_chip_gen_p5(res->cctx) ?
976 			 sizeof(struct sq_psn_search_ext) :
977 			 sizeof(struct sq_psn_search);
978 	}
979 
980 	hwq_attr.res = res;
981 	hwq_attr.sginfo = &sq->sg_info;
982 	hwq_attr.stride = sizeof(struct sq_sge);
983 	hwq_attr.depth = bnxt_qplib_get_depth(sq);
984 	hwq_attr.aux_stride = psn_sz;
985 	hwq_attr.aux_depth = bnxt_qplib_set_sq_size(sq, qp->wqe_mode);
986 	hwq_attr.type = HWQ_TYPE_QUEUE;
987 	rc = bnxt_qplib_alloc_init_hwq(&sq->hwq, &hwq_attr);
988 	if (rc)
989 		goto exit;
990 
991 	rc = bnxt_qplib_alloc_init_swq(sq);
992 	if (rc)
993 		goto fail_sq;
994 
995 	if (psn_sz)
996 		bnxt_qplib_init_psn_ptr(qp, psn_sz);
997 
998 	req.sq_size = cpu_to_le32(bnxt_qplib_set_sq_size(sq, qp->wqe_mode));
999 	pbl = &sq->hwq.pbl[PBL_LVL_0];
1000 	req.sq_pbl = cpu_to_le64(pbl->pg_map_arr[0]);
1001 	pg_sz_lvl = (bnxt_qplib_base_pg_size(&sq->hwq) <<
1002 		     CMDQ_CREATE_QP_SQ_PG_SIZE_SFT);
1003 	pg_sz_lvl |= (sq->hwq.level & CMDQ_CREATE_QP_SQ_LVL_MASK);
1004 	req.sq_pg_size_sq_lvl = pg_sz_lvl;
1005 	req.sq_fwo_sq_sge =
1006 		cpu_to_le16(((sq->max_sge & CMDQ_CREATE_QP_SQ_SGE_MASK) <<
1007 			     CMDQ_CREATE_QP_SQ_SGE_SFT) | 0);
1008 	req.scq_cid = cpu_to_le32(qp->scq->id);
1009 
1010 	/* RQ */
1011 	if (!qp->srq) {
1012 		hwq_attr.res = res;
1013 		hwq_attr.sginfo = &rq->sg_info;
1014 		hwq_attr.stride = sizeof(struct sq_sge);
1015 		hwq_attr.depth = bnxt_qplib_get_depth(rq);
1016 		hwq_attr.aux_stride = 0;
1017 		hwq_attr.aux_depth = 0;
1018 		hwq_attr.type = HWQ_TYPE_QUEUE;
1019 		rc = bnxt_qplib_alloc_init_hwq(&rq->hwq, &hwq_attr);
1020 		if (rc)
1021 			goto sq_swq;
1022 		rc = bnxt_qplib_alloc_init_swq(rq);
1023 		if (rc)
1024 			goto fail_rq;
1025 
1026 		req.rq_size = cpu_to_le32(rq->max_wqe);
1027 		pbl = &rq->hwq.pbl[PBL_LVL_0];
1028 		req.rq_pbl = cpu_to_le64(pbl->pg_map_arr[0]);
1029 		pg_sz_lvl = (bnxt_qplib_base_pg_size(&rq->hwq) <<
1030 			     CMDQ_CREATE_QP_RQ_PG_SIZE_SFT);
1031 		pg_sz_lvl |= (rq->hwq.level & CMDQ_CREATE_QP_RQ_LVL_MASK);
1032 		req.rq_pg_size_rq_lvl = pg_sz_lvl;
1033 		nsge = (qp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC) ?
1034 			6 : rq->max_sge;
1035 		req.rq_fwo_rq_sge =
1036 			cpu_to_le16(((nsge &
1037 				      CMDQ_CREATE_QP_RQ_SGE_MASK) <<
1038 				     CMDQ_CREATE_QP_RQ_SGE_SFT) | 0);
1039 	} else {
1040 		/* SRQ */
1041 		qp_flags |= CMDQ_CREATE_QP_QP_FLAGS_SRQ_USED;
1042 		req.srq_cid = cpu_to_le32(qp->srq->id);
1043 	}
1044 	req.rcq_cid = cpu_to_le32(qp->rcq->id);
1045 
1046 	qp_flags |= CMDQ_CREATE_QP_QP_FLAGS_RESERVED_LKEY_ENABLE;
1047 	qp_flags |= CMDQ_CREATE_QP_QP_FLAGS_FR_PMR_ENABLED;
1048 	if (qp->sig_type)
1049 		qp_flags |= CMDQ_CREATE_QP_QP_FLAGS_FORCE_COMPLETION;
1050 	if (qp->wqe_mode == BNXT_QPLIB_WQE_MODE_VARIABLE)
1051 		qp_flags |= CMDQ_CREATE_QP_QP_FLAGS_VARIABLE_SIZED_WQE_ENABLED;
1052 	req.qp_flags = cpu_to_le32(qp_flags);
1053 
1054 	/* ORRQ and IRRQ */
1055 	if (psn_sz) {
1056 		xrrq = &qp->orrq;
1057 		xrrq->max_elements =
1058 			ORD_LIMIT_TO_ORRQ_SLOTS(qp->max_rd_atomic);
1059 		req_size = xrrq->max_elements *
1060 			   BNXT_QPLIB_MAX_ORRQE_ENTRY_SIZE + PAGE_SIZE - 1;
1061 		req_size &= ~(PAGE_SIZE - 1);
1062 		sginfo.pgsize = req_size;
1063 		sginfo.pgshft = PAGE_SHIFT;
1064 
1065 		hwq_attr.res = res;
1066 		hwq_attr.sginfo = &sginfo;
1067 		hwq_attr.depth = xrrq->max_elements;
1068 		hwq_attr.stride = BNXT_QPLIB_MAX_ORRQE_ENTRY_SIZE;
1069 		hwq_attr.aux_stride = 0;
1070 		hwq_attr.aux_depth = 0;
1071 		hwq_attr.type = HWQ_TYPE_CTX;
1072 		rc = bnxt_qplib_alloc_init_hwq(xrrq, &hwq_attr);
1073 		if (rc)
1074 			goto rq_swq;
1075 		pbl = &xrrq->pbl[PBL_LVL_0];
1076 		req.orrq_addr = cpu_to_le64(pbl->pg_map_arr[0]);
1077 
1078 		xrrq = &qp->irrq;
1079 		xrrq->max_elements = IRD_LIMIT_TO_IRRQ_SLOTS(
1080 						qp->max_dest_rd_atomic);
1081 		req_size = xrrq->max_elements *
1082 			   BNXT_QPLIB_MAX_IRRQE_ENTRY_SIZE + PAGE_SIZE - 1;
1083 		req_size &= ~(PAGE_SIZE - 1);
1084 		sginfo.pgsize = req_size;
1085 		hwq_attr.depth =  xrrq->max_elements;
1086 		hwq_attr.stride = BNXT_QPLIB_MAX_IRRQE_ENTRY_SIZE;
1087 		rc = bnxt_qplib_alloc_init_hwq(xrrq, &hwq_attr);
1088 		if (rc)
1089 			goto fail_orrq;
1090 
1091 		pbl = &xrrq->pbl[PBL_LVL_0];
1092 		req.irrq_addr = cpu_to_le64(pbl->pg_map_arr[0]);
1093 	}
1094 	req.pd_id = cpu_to_le32(qp->pd->id);
1095 
1096 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
1097 					  (void *)&resp, NULL, 0);
1098 	if (rc)
1099 		goto fail;
1100 
1101 	qp->id = le32_to_cpu(resp.xid);
1102 	qp->cur_qp_state = CMDQ_MODIFY_QP_NEW_STATE_RESET;
1103 	INIT_LIST_HEAD(&qp->sq_flush);
1104 	INIT_LIST_HEAD(&qp->rq_flush);
1105 	qp->cctx = res->cctx;
1106 	sq->dbinfo.hwq = &sq->hwq;
1107 	sq->dbinfo.xid = qp->id;
1108 	sq->dbinfo.db = qp->dpi->dbr;
1109 	sq->dbinfo.max_slot = bnxt_qplib_set_sq_max_slot(qp->wqe_mode);
1110 	if (rq->max_wqe) {
1111 		rq->dbinfo.hwq = &rq->hwq;
1112 		rq->dbinfo.xid = qp->id;
1113 		rq->dbinfo.db = qp->dpi->dbr;
1114 		rq->dbinfo.max_slot = bnxt_qplib_set_rq_max_slot(rq->wqe_size);
1115 	}
1116 	tbl_indx = map_qp_id_to_tbl_indx(qp->id, rcfw);
1117 	rcfw->qp_tbl[tbl_indx].qp_id = qp->id;
1118 	rcfw->qp_tbl[tbl_indx].qp_handle = (void *)qp;
1119 
1120 	return 0;
1121 fail:
1122 	bnxt_qplib_free_hwq(res, &qp->irrq);
1123 fail_orrq:
1124 	bnxt_qplib_free_hwq(res, &qp->orrq);
1125 rq_swq:
1126 	kfree(rq->swq);
1127 fail_rq:
1128 	bnxt_qplib_free_hwq(res, &rq->hwq);
1129 sq_swq:
1130 	kfree(sq->swq);
1131 fail_sq:
1132 	bnxt_qplib_free_hwq(res, &sq->hwq);
1133 exit:
1134 	return rc;
1135 }
1136 
1137 static void __modify_flags_from_init_state(struct bnxt_qplib_qp *qp)
1138 {
1139 	switch (qp->state) {
1140 	case CMDQ_MODIFY_QP_NEW_STATE_RTR:
1141 		/* INIT->RTR, configure the path_mtu to the default
1142 		 * 2048 if not being requested
1143 		 */
1144 		if (!(qp->modify_flags &
1145 		    CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU)) {
1146 			qp->modify_flags |=
1147 				CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
1148 			qp->path_mtu =
1149 				CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
1150 		}
1151 		qp->modify_flags &=
1152 			~CMDQ_MODIFY_QP_MODIFY_MASK_VLAN_ID;
1153 		/* Bono FW require the max_dest_rd_atomic to be >= 1 */
1154 		if (qp->max_dest_rd_atomic < 1)
1155 			qp->max_dest_rd_atomic = 1;
1156 		qp->modify_flags &= ~CMDQ_MODIFY_QP_MODIFY_MASK_SRC_MAC;
1157 		/* Bono FW 20.6.5 requires SGID_INDEX configuration */
1158 		if (!(qp->modify_flags &
1159 		    CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX)) {
1160 			qp->modify_flags |=
1161 				CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX;
1162 			qp->ah.sgid_index = 0;
1163 		}
1164 		break;
1165 	default:
1166 		break;
1167 	}
1168 }
1169 
1170 static void __modify_flags_from_rtr_state(struct bnxt_qplib_qp *qp)
1171 {
1172 	switch (qp->state) {
1173 	case CMDQ_MODIFY_QP_NEW_STATE_RTS:
1174 		/* Bono FW requires the max_rd_atomic to be >= 1 */
1175 		if (qp->max_rd_atomic < 1)
1176 			qp->max_rd_atomic = 1;
1177 		/* Bono FW does not allow PKEY_INDEX,
1178 		 * DGID, FLOW_LABEL, SGID_INDEX, HOP_LIMIT,
1179 		 * TRAFFIC_CLASS, DEST_MAC, PATH_MTU, RQ_PSN,
1180 		 * MIN_RNR_TIMER, MAX_DEST_RD_ATOMIC, DEST_QP_ID
1181 		 * modification
1182 		 */
1183 		qp->modify_flags &=
1184 			~(CMDQ_MODIFY_QP_MODIFY_MASK_PKEY |
1185 			  CMDQ_MODIFY_QP_MODIFY_MASK_DGID |
1186 			  CMDQ_MODIFY_QP_MODIFY_MASK_FLOW_LABEL |
1187 			  CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX |
1188 			  CMDQ_MODIFY_QP_MODIFY_MASK_HOP_LIMIT |
1189 			  CMDQ_MODIFY_QP_MODIFY_MASK_TRAFFIC_CLASS |
1190 			  CMDQ_MODIFY_QP_MODIFY_MASK_DEST_MAC |
1191 			  CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU |
1192 			  CMDQ_MODIFY_QP_MODIFY_MASK_RQ_PSN |
1193 			  CMDQ_MODIFY_QP_MODIFY_MASK_MIN_RNR_TIMER |
1194 			  CMDQ_MODIFY_QP_MODIFY_MASK_MAX_DEST_RD_ATOMIC |
1195 			  CMDQ_MODIFY_QP_MODIFY_MASK_DEST_QP_ID);
1196 		break;
1197 	default:
1198 		break;
1199 	}
1200 }
1201 
1202 static void __filter_modify_flags(struct bnxt_qplib_qp *qp)
1203 {
1204 	switch (qp->cur_qp_state) {
1205 	case CMDQ_MODIFY_QP_NEW_STATE_RESET:
1206 		break;
1207 	case CMDQ_MODIFY_QP_NEW_STATE_INIT:
1208 		__modify_flags_from_init_state(qp);
1209 		break;
1210 	case CMDQ_MODIFY_QP_NEW_STATE_RTR:
1211 		__modify_flags_from_rtr_state(qp);
1212 		break;
1213 	case CMDQ_MODIFY_QP_NEW_STATE_RTS:
1214 		break;
1215 	case CMDQ_MODIFY_QP_NEW_STATE_SQD:
1216 		break;
1217 	case CMDQ_MODIFY_QP_NEW_STATE_SQE:
1218 		break;
1219 	case CMDQ_MODIFY_QP_NEW_STATE_ERR:
1220 		break;
1221 	default:
1222 		break;
1223 	}
1224 }
1225 
1226 int bnxt_qplib_modify_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
1227 {
1228 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
1229 	struct cmdq_modify_qp req;
1230 	struct creq_modify_qp_resp resp;
1231 	u16 cmd_flags = 0, pkey;
1232 	u32 temp32[4];
1233 	u32 bmask;
1234 	int rc;
1235 
1236 	RCFW_CMD_PREP(req, MODIFY_QP, cmd_flags);
1237 
1238 	/* Filter out the qp_attr_mask based on the state->new transition */
1239 	__filter_modify_flags(qp);
1240 	bmask = qp->modify_flags;
1241 	req.modify_mask = cpu_to_le32(qp->modify_flags);
1242 	req.qp_cid = cpu_to_le32(qp->id);
1243 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_STATE) {
1244 		req.network_type_en_sqd_async_notify_new_state =
1245 				(qp->state & CMDQ_MODIFY_QP_NEW_STATE_MASK) |
1246 				(qp->en_sqd_async_notify ?
1247 					CMDQ_MODIFY_QP_EN_SQD_ASYNC_NOTIFY : 0);
1248 	}
1249 	req.network_type_en_sqd_async_notify_new_state |= qp->nw_type;
1250 
1251 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_ACCESS)
1252 		req.access = qp->access;
1253 
1254 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_PKEY) {
1255 		if (!bnxt_qplib_get_pkey(res, &res->pkey_tbl,
1256 					 qp->pkey_index, &pkey))
1257 			req.pkey = cpu_to_le16(pkey);
1258 	}
1259 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_QKEY)
1260 		req.qkey = cpu_to_le32(qp->qkey);
1261 
1262 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_DGID) {
1263 		memcpy(temp32, qp->ah.dgid.data, sizeof(struct bnxt_qplib_gid));
1264 		req.dgid[0] = cpu_to_le32(temp32[0]);
1265 		req.dgid[1] = cpu_to_le32(temp32[1]);
1266 		req.dgid[2] = cpu_to_le32(temp32[2]);
1267 		req.dgid[3] = cpu_to_le32(temp32[3]);
1268 	}
1269 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_FLOW_LABEL)
1270 		req.flow_label = cpu_to_le32(qp->ah.flow_label);
1271 
1272 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX)
1273 		req.sgid_index = cpu_to_le16(res->sgid_tbl.hw_id
1274 					     [qp->ah.sgid_index]);
1275 
1276 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_HOP_LIMIT)
1277 		req.hop_limit = qp->ah.hop_limit;
1278 
1279 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_TRAFFIC_CLASS)
1280 		req.traffic_class = qp->ah.traffic_class;
1281 
1282 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_DEST_MAC)
1283 		memcpy(req.dest_mac, qp->ah.dmac, 6);
1284 
1285 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU)
1286 		req.path_mtu = qp->path_mtu;
1287 
1288 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_TIMEOUT)
1289 		req.timeout = qp->timeout;
1290 
1291 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_RETRY_CNT)
1292 		req.retry_cnt = qp->retry_cnt;
1293 
1294 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_RNR_RETRY)
1295 		req.rnr_retry = qp->rnr_retry;
1296 
1297 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_MIN_RNR_TIMER)
1298 		req.min_rnr_timer = qp->min_rnr_timer;
1299 
1300 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_RQ_PSN)
1301 		req.rq_psn = cpu_to_le32(qp->rq.psn);
1302 
1303 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN)
1304 		req.sq_psn = cpu_to_le32(qp->sq.psn);
1305 
1306 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_MAX_RD_ATOMIC)
1307 		req.max_rd_atomic =
1308 			ORD_LIMIT_TO_ORRQ_SLOTS(qp->max_rd_atomic);
1309 
1310 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_MAX_DEST_RD_ATOMIC)
1311 		req.max_dest_rd_atomic =
1312 			IRD_LIMIT_TO_IRRQ_SLOTS(qp->max_dest_rd_atomic);
1313 
1314 	req.sq_size = cpu_to_le32(qp->sq.hwq.max_elements);
1315 	req.rq_size = cpu_to_le32(qp->rq.hwq.max_elements);
1316 	req.sq_sge = cpu_to_le16(qp->sq.max_sge);
1317 	req.rq_sge = cpu_to_le16(qp->rq.max_sge);
1318 	req.max_inline_data = cpu_to_le32(qp->max_inline_data);
1319 	if (bmask & CMDQ_MODIFY_QP_MODIFY_MASK_DEST_QP_ID)
1320 		req.dest_qp_id = cpu_to_le32(qp->dest_qpn);
1321 
1322 	req.vlan_pcp_vlan_dei_vlan_id = cpu_to_le16(qp->vlan_id);
1323 
1324 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
1325 					  (void *)&resp, NULL, 0);
1326 	if (rc)
1327 		return rc;
1328 	qp->cur_qp_state = qp->state;
1329 	return 0;
1330 }
1331 
1332 int bnxt_qplib_query_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
1333 {
1334 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
1335 	struct cmdq_query_qp req;
1336 	struct creq_query_qp_resp resp;
1337 	struct bnxt_qplib_rcfw_sbuf *sbuf;
1338 	struct creq_query_qp_resp_sb *sb;
1339 	u16 cmd_flags = 0;
1340 	u32 temp32[4];
1341 	int i, rc = 0;
1342 
1343 	RCFW_CMD_PREP(req, QUERY_QP, cmd_flags);
1344 
1345 	sbuf = bnxt_qplib_rcfw_alloc_sbuf(rcfw, sizeof(*sb));
1346 	if (!sbuf)
1347 		return -ENOMEM;
1348 	sb = sbuf->sb;
1349 
1350 	req.qp_cid = cpu_to_le32(qp->id);
1351 	req.resp_size = sizeof(*sb) / BNXT_QPLIB_CMDQE_UNITS;
1352 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp,
1353 					  (void *)sbuf, 0);
1354 	if (rc)
1355 		goto bail;
1356 	/* Extract the context from the side buffer */
1357 	qp->state = sb->en_sqd_async_notify_state &
1358 			CREQ_QUERY_QP_RESP_SB_STATE_MASK;
1359 	qp->en_sqd_async_notify = sb->en_sqd_async_notify_state &
1360 				  CREQ_QUERY_QP_RESP_SB_EN_SQD_ASYNC_NOTIFY ?
1361 				  true : false;
1362 	qp->access = sb->access;
1363 	qp->pkey_index = le16_to_cpu(sb->pkey);
1364 	qp->qkey = le32_to_cpu(sb->qkey);
1365 
1366 	temp32[0] = le32_to_cpu(sb->dgid[0]);
1367 	temp32[1] = le32_to_cpu(sb->dgid[1]);
1368 	temp32[2] = le32_to_cpu(sb->dgid[2]);
1369 	temp32[3] = le32_to_cpu(sb->dgid[3]);
1370 	memcpy(qp->ah.dgid.data, temp32, sizeof(qp->ah.dgid.data));
1371 
1372 	qp->ah.flow_label = le32_to_cpu(sb->flow_label);
1373 
1374 	qp->ah.sgid_index = 0;
1375 	for (i = 0; i < res->sgid_tbl.max; i++) {
1376 		if (res->sgid_tbl.hw_id[i] == le16_to_cpu(sb->sgid_index)) {
1377 			qp->ah.sgid_index = i;
1378 			break;
1379 		}
1380 	}
1381 	if (i == res->sgid_tbl.max)
1382 		dev_warn(&res->pdev->dev, "SGID not found??\n");
1383 
1384 	qp->ah.hop_limit = sb->hop_limit;
1385 	qp->ah.traffic_class = sb->traffic_class;
1386 	memcpy(qp->ah.dmac, sb->dest_mac, 6);
1387 	qp->ah.vlan_id = (le16_to_cpu(sb->path_mtu_dest_vlan_id) &
1388 				CREQ_QUERY_QP_RESP_SB_VLAN_ID_MASK) >>
1389 				CREQ_QUERY_QP_RESP_SB_VLAN_ID_SFT;
1390 	qp->path_mtu = (le16_to_cpu(sb->path_mtu_dest_vlan_id) &
1391 				    CREQ_QUERY_QP_RESP_SB_PATH_MTU_MASK) >>
1392 				    CREQ_QUERY_QP_RESP_SB_PATH_MTU_SFT;
1393 	qp->timeout = sb->timeout;
1394 	qp->retry_cnt = sb->retry_cnt;
1395 	qp->rnr_retry = sb->rnr_retry;
1396 	qp->min_rnr_timer = sb->min_rnr_timer;
1397 	qp->rq.psn = le32_to_cpu(sb->rq_psn);
1398 	qp->max_rd_atomic = ORRQ_SLOTS_TO_ORD_LIMIT(sb->max_rd_atomic);
1399 	qp->sq.psn = le32_to_cpu(sb->sq_psn);
1400 	qp->max_dest_rd_atomic =
1401 			IRRQ_SLOTS_TO_IRD_LIMIT(sb->max_dest_rd_atomic);
1402 	qp->sq.max_wqe = qp->sq.hwq.max_elements;
1403 	qp->rq.max_wqe = qp->rq.hwq.max_elements;
1404 	qp->sq.max_sge = le16_to_cpu(sb->sq_sge);
1405 	qp->rq.max_sge = le16_to_cpu(sb->rq_sge);
1406 	qp->max_inline_data = le32_to_cpu(sb->max_inline_data);
1407 	qp->dest_qpn = le32_to_cpu(sb->dest_qp_id);
1408 	memcpy(qp->smac, sb->src_mac, 6);
1409 	qp->vlan_id = le16_to_cpu(sb->vlan_pcp_vlan_dei_vlan_id);
1410 bail:
1411 	bnxt_qplib_rcfw_free_sbuf(rcfw, sbuf);
1412 	return rc;
1413 }
1414 
1415 static void __clean_cq(struct bnxt_qplib_cq *cq, u64 qp)
1416 {
1417 	struct bnxt_qplib_hwq *cq_hwq = &cq->hwq;
1418 	struct cq_base *hw_cqe;
1419 	int i;
1420 
1421 	for (i = 0; i < cq_hwq->max_elements; i++) {
1422 		hw_cqe = bnxt_qplib_get_qe(cq_hwq, i, NULL);
1423 		if (!CQE_CMP_VALID(hw_cqe, i, cq_hwq->max_elements))
1424 			continue;
1425 		/*
1426 		 * The valid test of the entry must be done first before
1427 		 * reading any further.
1428 		 */
1429 		dma_rmb();
1430 		switch (hw_cqe->cqe_type_toggle & CQ_BASE_CQE_TYPE_MASK) {
1431 		case CQ_BASE_CQE_TYPE_REQ:
1432 		case CQ_BASE_CQE_TYPE_TERMINAL:
1433 		{
1434 			struct cq_req *cqe = (struct cq_req *)hw_cqe;
1435 
1436 			if (qp == le64_to_cpu(cqe->qp_handle))
1437 				cqe->qp_handle = 0;
1438 			break;
1439 		}
1440 		case CQ_BASE_CQE_TYPE_RES_RC:
1441 		case CQ_BASE_CQE_TYPE_RES_UD:
1442 		case CQ_BASE_CQE_TYPE_RES_RAWETH_QP1:
1443 		{
1444 			struct cq_res_rc *cqe = (struct cq_res_rc *)hw_cqe;
1445 
1446 			if (qp == le64_to_cpu(cqe->qp_handle))
1447 				cqe->qp_handle = 0;
1448 			break;
1449 		}
1450 		default:
1451 			break;
1452 		}
1453 	}
1454 }
1455 
1456 int bnxt_qplib_destroy_qp(struct bnxt_qplib_res *res,
1457 			  struct bnxt_qplib_qp *qp)
1458 {
1459 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
1460 	struct cmdq_destroy_qp req;
1461 	struct creq_destroy_qp_resp resp;
1462 	u16 cmd_flags = 0;
1463 	u32 tbl_indx;
1464 	int rc;
1465 
1466 	tbl_indx = map_qp_id_to_tbl_indx(qp->id, rcfw);
1467 	rcfw->qp_tbl[tbl_indx].qp_id = BNXT_QPLIB_QP_ID_INVALID;
1468 	rcfw->qp_tbl[tbl_indx].qp_handle = NULL;
1469 
1470 	RCFW_CMD_PREP(req, DESTROY_QP, cmd_flags);
1471 
1472 	req.qp_cid = cpu_to_le32(qp->id);
1473 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
1474 					  (void *)&resp, NULL, 0);
1475 	if (rc) {
1476 		rcfw->qp_tbl[tbl_indx].qp_id = qp->id;
1477 		rcfw->qp_tbl[tbl_indx].qp_handle = qp;
1478 		return rc;
1479 	}
1480 
1481 	return 0;
1482 }
1483 
1484 void bnxt_qplib_free_qp_res(struct bnxt_qplib_res *res,
1485 			    struct bnxt_qplib_qp *qp)
1486 {
1487 	bnxt_qplib_free_qp_hdr_buf(res, qp);
1488 	bnxt_qplib_free_hwq(res, &qp->sq.hwq);
1489 	kfree(qp->sq.swq);
1490 
1491 	bnxt_qplib_free_hwq(res, &qp->rq.hwq);
1492 	kfree(qp->rq.swq);
1493 
1494 	if (qp->irrq.max_elements)
1495 		bnxt_qplib_free_hwq(res, &qp->irrq);
1496 	if (qp->orrq.max_elements)
1497 		bnxt_qplib_free_hwq(res, &qp->orrq);
1498 
1499 }
1500 
1501 void *bnxt_qplib_get_qp1_sq_buf(struct bnxt_qplib_qp *qp,
1502 				struct bnxt_qplib_sge *sge)
1503 {
1504 	struct bnxt_qplib_q *sq = &qp->sq;
1505 	u32 sw_prod;
1506 
1507 	memset(sge, 0, sizeof(*sge));
1508 
1509 	if (qp->sq_hdr_buf) {
1510 		sw_prod = sq->swq_start;
1511 		sge->addr = (dma_addr_t)(qp->sq_hdr_buf_map +
1512 					 sw_prod * qp->sq_hdr_buf_size);
1513 		sge->lkey = 0xFFFFFFFF;
1514 		sge->size = qp->sq_hdr_buf_size;
1515 		return qp->sq_hdr_buf + sw_prod * sge->size;
1516 	}
1517 	return NULL;
1518 }
1519 
1520 u32 bnxt_qplib_get_rq_prod_index(struct bnxt_qplib_qp *qp)
1521 {
1522 	struct bnxt_qplib_q *rq = &qp->rq;
1523 
1524 	return rq->swq_start;
1525 }
1526 
1527 dma_addr_t bnxt_qplib_get_qp_buf_from_index(struct bnxt_qplib_qp *qp, u32 index)
1528 {
1529 	return (qp->rq_hdr_buf_map + index * qp->rq_hdr_buf_size);
1530 }
1531 
1532 void *bnxt_qplib_get_qp1_rq_buf(struct bnxt_qplib_qp *qp,
1533 				struct bnxt_qplib_sge *sge)
1534 {
1535 	struct bnxt_qplib_q *rq = &qp->rq;
1536 	u32 sw_prod;
1537 
1538 	memset(sge, 0, sizeof(*sge));
1539 
1540 	if (qp->rq_hdr_buf) {
1541 		sw_prod = rq->swq_start;
1542 		sge->addr = (dma_addr_t)(qp->rq_hdr_buf_map +
1543 					 sw_prod * qp->rq_hdr_buf_size);
1544 		sge->lkey = 0xFFFFFFFF;
1545 		sge->size = qp->rq_hdr_buf_size;
1546 		return qp->rq_hdr_buf + sw_prod * sge->size;
1547 	}
1548 	return NULL;
1549 }
1550 
1551 static void bnxt_qplib_fill_psn_search(struct bnxt_qplib_qp *qp,
1552 				       struct bnxt_qplib_swqe *wqe,
1553 				       struct bnxt_qplib_swq *swq)
1554 {
1555 	struct sq_psn_search_ext *psns_ext;
1556 	struct sq_psn_search *psns;
1557 	u32 flg_npsn;
1558 	u32 op_spsn;
1559 
1560 	if (!swq->psn_search)
1561 		return;
1562 	psns = swq->psn_search;
1563 	psns_ext = swq->psn_ext;
1564 
1565 	op_spsn = ((swq->start_psn << SQ_PSN_SEARCH_START_PSN_SFT) &
1566 		    SQ_PSN_SEARCH_START_PSN_MASK);
1567 	op_spsn |= ((wqe->type << SQ_PSN_SEARCH_OPCODE_SFT) &
1568 		     SQ_PSN_SEARCH_OPCODE_MASK);
1569 	flg_npsn = ((swq->next_psn << SQ_PSN_SEARCH_NEXT_PSN_SFT) &
1570 		     SQ_PSN_SEARCH_NEXT_PSN_MASK);
1571 
1572 	if (bnxt_qplib_is_chip_gen_p5(qp->cctx)) {
1573 		psns_ext->opcode_start_psn = cpu_to_le32(op_spsn);
1574 		psns_ext->flags_next_psn = cpu_to_le32(flg_npsn);
1575 		psns_ext->start_slot_idx = cpu_to_le16(swq->slot_idx);
1576 	} else {
1577 		psns->opcode_start_psn = cpu_to_le32(op_spsn);
1578 		psns->flags_next_psn = cpu_to_le32(flg_npsn);
1579 	}
1580 }
1581 
1582 static int bnxt_qplib_put_inline(struct bnxt_qplib_qp *qp,
1583 				 struct bnxt_qplib_swqe *wqe,
1584 				 u16 *idx)
1585 {
1586 	struct bnxt_qplib_hwq *hwq;
1587 	int len, t_len, offt;
1588 	bool pull_dst = true;
1589 	void *il_dst = NULL;
1590 	void *il_src = NULL;
1591 	int t_cplen, cplen;
1592 	int indx;
1593 
1594 	hwq = &qp->sq.hwq;
1595 	t_len = 0;
1596 	for (indx = 0; indx < wqe->num_sge; indx++) {
1597 		len = wqe->sg_list[indx].size;
1598 		il_src = (void *)wqe->sg_list[indx].addr;
1599 		t_len += len;
1600 		if (t_len > qp->max_inline_data)
1601 			goto bad;
1602 		while (len) {
1603 			if (pull_dst) {
1604 				pull_dst = false;
1605 				il_dst = bnxt_qplib_get_prod_qe(hwq, *idx);
1606 				(*idx)++;
1607 				t_cplen = 0;
1608 				offt = 0;
1609 			}
1610 			cplen = min_t(int, len, sizeof(struct sq_sge));
1611 			cplen = min_t(int, cplen,
1612 					(sizeof(struct sq_sge) - offt));
1613 			memcpy(il_dst, il_src, cplen);
1614 			t_cplen += cplen;
1615 			il_src += cplen;
1616 			il_dst += cplen;
1617 			offt += cplen;
1618 			len -= cplen;
1619 			if (t_cplen == sizeof(struct sq_sge))
1620 				pull_dst = true;
1621 		}
1622 	}
1623 
1624 	return t_len;
1625 bad:
1626 	return -ENOMEM;
1627 }
1628 
1629 static u32 bnxt_qplib_put_sges(struct bnxt_qplib_hwq *hwq,
1630 			       struct bnxt_qplib_sge *ssge,
1631 			       u16 nsge, u16 *idx)
1632 {
1633 	struct sq_sge *dsge;
1634 	int indx, len = 0;
1635 
1636 	for (indx = 0; indx < nsge; indx++, (*idx)++) {
1637 		dsge = bnxt_qplib_get_prod_qe(hwq, *idx);
1638 		dsge->va_or_pa = cpu_to_le64(ssge[indx].addr);
1639 		dsge->l_key = cpu_to_le32(ssge[indx].lkey);
1640 		dsge->size = cpu_to_le32(ssge[indx].size);
1641 		len += ssge[indx].size;
1642 	}
1643 
1644 	return len;
1645 }
1646 
1647 static u16 bnxt_qplib_required_slots(struct bnxt_qplib_qp *qp,
1648 				     struct bnxt_qplib_swqe *wqe,
1649 				     u16 *wqe_sz, u16 *qdf, u8 mode)
1650 {
1651 	u32 ilsize, bytes;
1652 	u16 nsge;
1653 	u16 slot;
1654 
1655 	nsge = wqe->num_sge;
1656 	/* Adding sq_send_hdr is a misnomer, for rq also hdr size is same. */
1657 	bytes = sizeof(struct sq_send_hdr) + nsge * sizeof(struct sq_sge);
1658 	if (wqe->flags & BNXT_QPLIB_SWQE_FLAGS_INLINE) {
1659 		ilsize = bnxt_qplib_calc_ilsize(wqe, qp->max_inline_data);
1660 		bytes = ALIGN(ilsize, sizeof(struct sq_sge));
1661 		bytes += sizeof(struct sq_send_hdr);
1662 	}
1663 
1664 	*qdf =  __xlate_qfd(qp->sq.q_full_delta, bytes);
1665 	slot = bytes >> 4;
1666 	*wqe_sz = slot;
1667 	if (mode == BNXT_QPLIB_WQE_MODE_STATIC)
1668 		slot = 8;
1669 	return slot;
1670 }
1671 
1672 static void bnxt_qplib_pull_psn_buff(struct bnxt_qplib_q *sq,
1673 				     struct bnxt_qplib_swq *swq)
1674 {
1675 	struct bnxt_qplib_hwq *hwq;
1676 	u32 pg_num, pg_indx;
1677 	void *buff;
1678 	u32 tail;
1679 
1680 	hwq = &sq->hwq;
1681 	if (!hwq->pad_pg)
1682 		return;
1683 	tail = swq->slot_idx / sq->dbinfo.max_slot;
1684 	pg_num = (tail + hwq->pad_pgofft) / (PAGE_SIZE / hwq->pad_stride);
1685 	pg_indx = (tail + hwq->pad_pgofft) % (PAGE_SIZE / hwq->pad_stride);
1686 	buff = (void *)(hwq->pad_pg[pg_num] + pg_indx * hwq->pad_stride);
1687 	swq->psn_ext = buff;
1688 	swq->psn_search = buff;
1689 }
1690 
1691 void bnxt_qplib_post_send_db(struct bnxt_qplib_qp *qp)
1692 {
1693 	struct bnxt_qplib_q *sq = &qp->sq;
1694 
1695 	bnxt_qplib_ring_prod_db(&sq->dbinfo, DBC_DBC_TYPE_SQ);
1696 }
1697 
1698 int bnxt_qplib_post_send(struct bnxt_qplib_qp *qp,
1699 			 struct bnxt_qplib_swqe *wqe)
1700 {
1701 	struct bnxt_qplib_nq_work *nq_work = NULL;
1702 	int i, rc = 0, data_len = 0, pkt_num = 0;
1703 	struct bnxt_qplib_q *sq = &qp->sq;
1704 	struct bnxt_qplib_hwq *hwq;
1705 	struct bnxt_qplib_swq *swq;
1706 	bool sch_handler = false;
1707 	u16 wqe_sz, qdf = 0;
1708 	void *base_hdr;
1709 	void *ext_hdr;
1710 	__le32 temp32;
1711 	u32 wqe_idx;
1712 	u32 slots;
1713 	u16 idx;
1714 
1715 	hwq = &sq->hwq;
1716 	if (qp->state != CMDQ_MODIFY_QP_NEW_STATE_RTS &&
1717 	    qp->state != CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1718 		dev_err(&hwq->pdev->dev,
1719 			"QPLIB: FP: QP (0x%x) is in the 0x%x state",
1720 			qp->id, qp->state);
1721 		rc = -EINVAL;
1722 		goto done;
1723 	}
1724 
1725 	slots = bnxt_qplib_required_slots(qp, wqe, &wqe_sz, &qdf, qp->wqe_mode);
1726 	if (bnxt_qplib_queue_full(sq, slots + qdf)) {
1727 		dev_err(&hwq->pdev->dev,
1728 			"prod = %#x cons = %#x qdepth = %#x delta = %#x\n",
1729 			hwq->prod, hwq->cons, hwq->depth, sq->q_full_delta);
1730 		rc = -ENOMEM;
1731 		goto done;
1732 	}
1733 
1734 	swq = bnxt_qplib_get_swqe(sq, &wqe_idx);
1735 	bnxt_qplib_pull_psn_buff(sq, swq);
1736 
1737 	idx = 0;
1738 	swq->slot_idx = hwq->prod;
1739 	swq->slots = slots;
1740 	swq->wr_id = wqe->wr_id;
1741 	swq->type = wqe->type;
1742 	swq->flags = wqe->flags;
1743 	swq->start_psn = sq->psn & BTH_PSN_MASK;
1744 	if (qp->sig_type)
1745 		swq->flags |= SQ_SEND_FLAGS_SIGNAL_COMP;
1746 
1747 	if (qp->state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1748 		sch_handler = true;
1749 		dev_dbg(&hwq->pdev->dev,
1750 			"%s Error QP. Scheduling for poll_cq\n", __func__);
1751 		goto queue_err;
1752 	}
1753 
1754 	base_hdr = bnxt_qplib_get_prod_qe(hwq, idx++);
1755 	ext_hdr = bnxt_qplib_get_prod_qe(hwq, idx++);
1756 	memset(base_hdr, 0, sizeof(struct sq_sge));
1757 	memset(ext_hdr, 0, sizeof(struct sq_sge));
1758 
1759 	if (wqe->flags & BNXT_QPLIB_SWQE_FLAGS_INLINE)
1760 		/* Copy the inline data */
1761 		data_len = bnxt_qplib_put_inline(qp, wqe, &idx);
1762 	else
1763 		data_len = bnxt_qplib_put_sges(hwq, wqe->sg_list, wqe->num_sge,
1764 					       &idx);
1765 	if (data_len < 0)
1766 		goto queue_err;
1767 	/* Specifics */
1768 	switch (wqe->type) {
1769 	case BNXT_QPLIB_SWQE_TYPE_SEND:
1770 		if (qp->type == CMDQ_CREATE_QP1_TYPE_GSI) {
1771 			struct sq_send_raweth_qp1_hdr *sqe = base_hdr;
1772 			struct sq_raw_ext_hdr *ext_sqe = ext_hdr;
1773 			/* Assemble info for Raw Ethertype QPs */
1774 
1775 			sqe->wqe_type = wqe->type;
1776 			sqe->flags = wqe->flags;
1777 			sqe->wqe_size = wqe_sz;
1778 			sqe->cfa_action = cpu_to_le16(wqe->rawqp1.cfa_action);
1779 			sqe->lflags = cpu_to_le16(wqe->rawqp1.lflags);
1780 			sqe->length = cpu_to_le32(data_len);
1781 			ext_sqe->cfa_meta = cpu_to_le32((wqe->rawqp1.cfa_meta &
1782 				SQ_SEND_RAWETH_QP1_CFA_META_VLAN_VID_MASK) <<
1783 				SQ_SEND_RAWETH_QP1_CFA_META_VLAN_VID_SFT);
1784 
1785 			break;
1786 		}
1787 		fallthrough;
1788 	case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM:
1789 	case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV:
1790 	{
1791 		struct sq_ud_ext_hdr *ext_sqe = ext_hdr;
1792 		struct sq_send_hdr *sqe = base_hdr;
1793 
1794 		sqe->wqe_type = wqe->type;
1795 		sqe->flags = wqe->flags;
1796 		sqe->wqe_size = wqe_sz;
1797 		sqe->inv_key_or_imm_data = cpu_to_le32(wqe->send.inv_key);
1798 		if (qp->type == CMDQ_CREATE_QP_TYPE_UD ||
1799 		    qp->type == CMDQ_CREATE_QP_TYPE_GSI) {
1800 			sqe->q_key = cpu_to_le32(wqe->send.q_key);
1801 			sqe->length = cpu_to_le32(data_len);
1802 			sq->psn = (sq->psn + 1) & BTH_PSN_MASK;
1803 			ext_sqe->dst_qp = cpu_to_le32(wqe->send.dst_qp &
1804 						      SQ_SEND_DST_QP_MASK);
1805 			ext_sqe->avid = cpu_to_le32(wqe->send.avid &
1806 						    SQ_SEND_AVID_MASK);
1807 		} else {
1808 			sqe->length = cpu_to_le32(data_len);
1809 			if (qp->mtu)
1810 				pkt_num = (data_len + qp->mtu - 1) / qp->mtu;
1811 			if (!pkt_num)
1812 				pkt_num = 1;
1813 			sq->psn = (sq->psn + pkt_num) & BTH_PSN_MASK;
1814 		}
1815 		break;
1816 	}
1817 	case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE:
1818 	case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM:
1819 	case BNXT_QPLIB_SWQE_TYPE_RDMA_READ:
1820 	{
1821 		struct sq_rdma_ext_hdr *ext_sqe = ext_hdr;
1822 		struct sq_rdma_hdr *sqe = base_hdr;
1823 
1824 		sqe->wqe_type = wqe->type;
1825 		sqe->flags = wqe->flags;
1826 		sqe->wqe_size = wqe_sz;
1827 		sqe->imm_data = cpu_to_le32(wqe->rdma.inv_key);
1828 		sqe->length = cpu_to_le32((u32)data_len);
1829 		ext_sqe->remote_va = cpu_to_le64(wqe->rdma.remote_va);
1830 		ext_sqe->remote_key = cpu_to_le32(wqe->rdma.r_key);
1831 		if (qp->mtu)
1832 			pkt_num = (data_len + qp->mtu - 1) / qp->mtu;
1833 		if (!pkt_num)
1834 			pkt_num = 1;
1835 		sq->psn = (sq->psn + pkt_num) & BTH_PSN_MASK;
1836 		break;
1837 	}
1838 	case BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP:
1839 	case BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD:
1840 	{
1841 		struct sq_atomic_ext_hdr *ext_sqe = ext_hdr;
1842 		struct sq_atomic_hdr *sqe = base_hdr;
1843 
1844 		sqe->wqe_type = wqe->type;
1845 		sqe->flags = wqe->flags;
1846 		sqe->remote_key = cpu_to_le32(wqe->atomic.r_key);
1847 		sqe->remote_va = cpu_to_le64(wqe->atomic.remote_va);
1848 		ext_sqe->swap_data = cpu_to_le64(wqe->atomic.swap_data);
1849 		ext_sqe->cmp_data = cpu_to_le64(wqe->atomic.cmp_data);
1850 		if (qp->mtu)
1851 			pkt_num = (data_len + qp->mtu - 1) / qp->mtu;
1852 		if (!pkt_num)
1853 			pkt_num = 1;
1854 		sq->psn = (sq->psn + pkt_num) & BTH_PSN_MASK;
1855 		break;
1856 	}
1857 	case BNXT_QPLIB_SWQE_TYPE_LOCAL_INV:
1858 	{
1859 		struct sq_localinvalidate *sqe = base_hdr;
1860 
1861 		sqe->wqe_type = wqe->type;
1862 		sqe->flags = wqe->flags;
1863 		sqe->inv_l_key = cpu_to_le32(wqe->local_inv.inv_l_key);
1864 
1865 		break;
1866 	}
1867 	case BNXT_QPLIB_SWQE_TYPE_FAST_REG_MR:
1868 	{
1869 		struct sq_fr_pmr_ext_hdr *ext_sqe = ext_hdr;
1870 		struct sq_fr_pmr_hdr *sqe = base_hdr;
1871 
1872 		sqe->wqe_type = wqe->type;
1873 		sqe->flags = wqe->flags;
1874 		sqe->access_cntl = wqe->frmr.access_cntl |
1875 				   SQ_FR_PMR_ACCESS_CNTL_LOCAL_WRITE;
1876 		sqe->zero_based_page_size_log =
1877 			(wqe->frmr.pg_sz_log & SQ_FR_PMR_PAGE_SIZE_LOG_MASK) <<
1878 			SQ_FR_PMR_PAGE_SIZE_LOG_SFT |
1879 			(wqe->frmr.zero_based ? SQ_FR_PMR_ZERO_BASED : 0);
1880 		sqe->l_key = cpu_to_le32(wqe->frmr.l_key);
1881 		temp32 = cpu_to_le32(wqe->frmr.length);
1882 		memcpy(sqe->length, &temp32, sizeof(wqe->frmr.length));
1883 		sqe->numlevels_pbl_page_size_log =
1884 			((wqe->frmr.pbl_pg_sz_log <<
1885 					SQ_FR_PMR_PBL_PAGE_SIZE_LOG_SFT) &
1886 					SQ_FR_PMR_PBL_PAGE_SIZE_LOG_MASK) |
1887 			((wqe->frmr.levels << SQ_FR_PMR_NUMLEVELS_SFT) &
1888 					SQ_FR_PMR_NUMLEVELS_MASK);
1889 
1890 		for (i = 0; i < wqe->frmr.page_list_len; i++)
1891 			wqe->frmr.pbl_ptr[i] = cpu_to_le64(
1892 						wqe->frmr.page_list[i] |
1893 						PTU_PTE_VALID);
1894 		ext_sqe->pblptr = cpu_to_le64(wqe->frmr.pbl_dma_ptr);
1895 		ext_sqe->va = cpu_to_le64(wqe->frmr.va);
1896 
1897 		break;
1898 	}
1899 	case BNXT_QPLIB_SWQE_TYPE_BIND_MW:
1900 	{
1901 		struct sq_bind_ext_hdr *ext_sqe = ext_hdr;
1902 		struct sq_bind_hdr *sqe = base_hdr;
1903 
1904 		sqe->wqe_type = wqe->type;
1905 		sqe->flags = wqe->flags;
1906 		sqe->access_cntl = wqe->bind.access_cntl;
1907 		sqe->mw_type_zero_based = wqe->bind.mw_type |
1908 			(wqe->bind.zero_based ? SQ_BIND_ZERO_BASED : 0);
1909 		sqe->parent_l_key = cpu_to_le32(wqe->bind.parent_l_key);
1910 		sqe->l_key = cpu_to_le32(wqe->bind.r_key);
1911 		ext_sqe->va = cpu_to_le64(wqe->bind.va);
1912 		ext_sqe->length_lo = cpu_to_le32(wqe->bind.length);
1913 		break;
1914 	}
1915 	default:
1916 		/* Bad wqe, return error */
1917 		rc = -EINVAL;
1918 		goto done;
1919 	}
1920 	swq->next_psn = sq->psn & BTH_PSN_MASK;
1921 	bnxt_qplib_fill_psn_search(qp, wqe, swq);
1922 queue_err:
1923 	bnxt_qplib_swq_mod_start(sq, wqe_idx);
1924 	bnxt_qplib_hwq_incr_prod(hwq, swq->slots);
1925 	qp->wqe_cnt++;
1926 done:
1927 	if (sch_handler) {
1928 		nq_work = kzalloc(sizeof(*nq_work), GFP_ATOMIC);
1929 		if (nq_work) {
1930 			nq_work->cq = qp->scq;
1931 			nq_work->nq = qp->scq->nq;
1932 			INIT_WORK(&nq_work->work, bnxt_qpn_cqn_sched_task);
1933 			queue_work(qp->scq->nq->cqn_wq, &nq_work->work);
1934 		} else {
1935 			dev_err(&hwq->pdev->dev,
1936 				"FP: Failed to allocate SQ nq_work!\n");
1937 			rc = -ENOMEM;
1938 		}
1939 	}
1940 	return rc;
1941 }
1942 
1943 void bnxt_qplib_post_recv_db(struct bnxt_qplib_qp *qp)
1944 {
1945 	struct bnxt_qplib_q *rq = &qp->rq;
1946 
1947 	bnxt_qplib_ring_prod_db(&rq->dbinfo, DBC_DBC_TYPE_RQ);
1948 }
1949 
1950 int bnxt_qplib_post_recv(struct bnxt_qplib_qp *qp,
1951 			 struct bnxt_qplib_swqe *wqe)
1952 {
1953 	struct bnxt_qplib_nq_work *nq_work = NULL;
1954 	struct bnxt_qplib_q *rq = &qp->rq;
1955 	struct rq_wqe_hdr *base_hdr;
1956 	struct rq_ext_hdr *ext_hdr;
1957 	struct bnxt_qplib_hwq *hwq;
1958 	struct bnxt_qplib_swq *swq;
1959 	bool sch_handler = false;
1960 	u16 wqe_sz, idx;
1961 	u32 wqe_idx;
1962 	int rc = 0;
1963 
1964 	hwq = &rq->hwq;
1965 	if (qp->state == CMDQ_MODIFY_QP_NEW_STATE_RESET) {
1966 		dev_err(&hwq->pdev->dev,
1967 			"QPLIB: FP: QP (0x%x) is in the 0x%x state",
1968 			qp->id, qp->state);
1969 		rc = -EINVAL;
1970 		goto done;
1971 	}
1972 
1973 	if (bnxt_qplib_queue_full(rq, rq->dbinfo.max_slot)) {
1974 		dev_err(&hwq->pdev->dev,
1975 			"FP: QP (0x%x) RQ is full!\n", qp->id);
1976 		rc = -EINVAL;
1977 		goto done;
1978 	}
1979 
1980 	swq = bnxt_qplib_get_swqe(rq, &wqe_idx);
1981 	swq->wr_id = wqe->wr_id;
1982 	swq->slots = rq->dbinfo.max_slot;
1983 
1984 	if (qp->state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1985 		sch_handler = true;
1986 		dev_dbg(&hwq->pdev->dev,
1987 			"%s: Error QP. Scheduling for poll_cq\n", __func__);
1988 		goto queue_err;
1989 	}
1990 
1991 	idx = 0;
1992 	base_hdr = bnxt_qplib_get_prod_qe(hwq, idx++);
1993 	ext_hdr = bnxt_qplib_get_prod_qe(hwq, idx++);
1994 	memset(base_hdr, 0, sizeof(struct sq_sge));
1995 	memset(ext_hdr, 0, sizeof(struct sq_sge));
1996 	wqe_sz = (sizeof(struct rq_wqe_hdr) +
1997 	wqe->num_sge * sizeof(struct sq_sge)) >> 4;
1998 	bnxt_qplib_put_sges(hwq, wqe->sg_list, wqe->num_sge, &idx);
1999 	if (!wqe->num_sge) {
2000 		struct sq_sge *sge;
2001 
2002 		sge = bnxt_qplib_get_prod_qe(hwq, idx++);
2003 		sge->size = 0;
2004 		wqe_sz++;
2005 	}
2006 	base_hdr->wqe_type = wqe->type;
2007 	base_hdr->flags = wqe->flags;
2008 	base_hdr->wqe_size = wqe_sz;
2009 	base_hdr->wr_id[0] = cpu_to_le32(wqe_idx);
2010 queue_err:
2011 	bnxt_qplib_swq_mod_start(rq, wqe_idx);
2012 	bnxt_qplib_hwq_incr_prod(hwq, swq->slots);
2013 done:
2014 	if (sch_handler) {
2015 		nq_work = kzalloc(sizeof(*nq_work), GFP_ATOMIC);
2016 		if (nq_work) {
2017 			nq_work->cq = qp->rcq;
2018 			nq_work->nq = qp->rcq->nq;
2019 			INIT_WORK(&nq_work->work, bnxt_qpn_cqn_sched_task);
2020 			queue_work(qp->rcq->nq->cqn_wq, &nq_work->work);
2021 		} else {
2022 			dev_err(&hwq->pdev->dev,
2023 				"FP: Failed to allocate RQ nq_work!\n");
2024 			rc = -ENOMEM;
2025 		}
2026 	}
2027 
2028 	return rc;
2029 }
2030 
2031 /* CQ */
2032 int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq)
2033 {
2034 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
2035 	struct bnxt_qplib_hwq_attr hwq_attr = {};
2036 	struct creq_create_cq_resp resp;
2037 	struct bnxt_qplib_pbl *pbl;
2038 	struct cmdq_create_cq req;
2039 	u16 cmd_flags = 0;
2040 	u32 pg_sz_lvl;
2041 	int rc;
2042 
2043 	hwq_attr.res = res;
2044 	hwq_attr.depth = cq->max_wqe;
2045 	hwq_attr.stride = sizeof(struct cq_base);
2046 	hwq_attr.type = HWQ_TYPE_QUEUE;
2047 	hwq_attr.sginfo = &cq->sg_info;
2048 	rc = bnxt_qplib_alloc_init_hwq(&cq->hwq, &hwq_attr);
2049 	if (rc)
2050 		goto exit;
2051 
2052 	RCFW_CMD_PREP(req, CREATE_CQ, cmd_flags);
2053 
2054 	if (!cq->dpi) {
2055 		dev_err(&rcfw->pdev->dev,
2056 			"FP: CREATE_CQ failed due to NULL DPI\n");
2057 		return -EINVAL;
2058 	}
2059 	req.dpi = cpu_to_le32(cq->dpi->dpi);
2060 	req.cq_handle = cpu_to_le64(cq->cq_handle);
2061 	req.cq_size = cpu_to_le32(cq->hwq.max_elements);
2062 	pbl = &cq->hwq.pbl[PBL_LVL_0];
2063 	pg_sz_lvl = (bnxt_qplib_base_pg_size(&cq->hwq) <<
2064 		     CMDQ_CREATE_CQ_PG_SIZE_SFT);
2065 	pg_sz_lvl |= (cq->hwq.level & CMDQ_CREATE_CQ_LVL_MASK);
2066 	req.pg_size_lvl = cpu_to_le32(pg_sz_lvl);
2067 	req.pbl = cpu_to_le64(pbl->pg_map_arr[0]);
2068 	req.cq_fco_cnq_id = cpu_to_le32(
2069 			(cq->cnq_hw_ring_id & CMDQ_CREATE_CQ_CNQ_ID_MASK) <<
2070 			 CMDQ_CREATE_CQ_CNQ_ID_SFT);
2071 
2072 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
2073 					  (void *)&resp, NULL, 0);
2074 	if (rc)
2075 		goto fail;
2076 
2077 	cq->id = le32_to_cpu(resp.xid);
2078 	cq->period = BNXT_QPLIB_QUEUE_START_PERIOD;
2079 	init_waitqueue_head(&cq->waitq);
2080 	INIT_LIST_HEAD(&cq->sqf_head);
2081 	INIT_LIST_HEAD(&cq->rqf_head);
2082 	spin_lock_init(&cq->compl_lock);
2083 	spin_lock_init(&cq->flush_lock);
2084 
2085 	cq->dbinfo.hwq = &cq->hwq;
2086 	cq->dbinfo.xid = cq->id;
2087 	cq->dbinfo.db = cq->dpi->dbr;
2088 	cq->dbinfo.priv_db = res->dpi_tbl.dbr_bar_reg_iomem;
2089 
2090 	bnxt_qplib_armen_db(&cq->dbinfo, DBC_DBC_TYPE_CQ_ARMENA);
2091 
2092 	return 0;
2093 
2094 fail:
2095 	bnxt_qplib_free_hwq(res, &cq->hwq);
2096 exit:
2097 	return rc;
2098 }
2099 
2100 int bnxt_qplib_destroy_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq)
2101 {
2102 	struct bnxt_qplib_rcfw *rcfw = res->rcfw;
2103 	struct cmdq_destroy_cq req;
2104 	struct creq_destroy_cq_resp resp;
2105 	u16 total_cnq_events;
2106 	u16 cmd_flags = 0;
2107 	int rc;
2108 
2109 	RCFW_CMD_PREP(req, DESTROY_CQ, cmd_flags);
2110 
2111 	req.cq_cid = cpu_to_le32(cq->id);
2112 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
2113 					  (void *)&resp, NULL, 0);
2114 	if (rc)
2115 		return rc;
2116 	total_cnq_events = le16_to_cpu(resp.total_cnq_events);
2117 	__wait_for_all_nqes(cq, total_cnq_events);
2118 	bnxt_qplib_free_hwq(res, &cq->hwq);
2119 	return 0;
2120 }
2121 
2122 static int __flush_sq(struct bnxt_qplib_q *sq, struct bnxt_qplib_qp *qp,
2123 		      struct bnxt_qplib_cqe **pcqe, int *budget)
2124 {
2125 	struct bnxt_qplib_cqe *cqe;
2126 	u32 start, last;
2127 	int rc = 0;
2128 
2129 	/* Now complete all outstanding SQEs with FLUSHED_ERR */
2130 	start = sq->swq_start;
2131 	cqe = *pcqe;
2132 	while (*budget) {
2133 		last = sq->swq_last;
2134 		if (start == last)
2135 			break;
2136 		/* Skip the FENCE WQE completions */
2137 		if (sq->swq[last].wr_id == BNXT_QPLIB_FENCE_WRID) {
2138 			bnxt_qplib_cancel_phantom_processing(qp);
2139 			goto skip_compl;
2140 		}
2141 		memset(cqe, 0, sizeof(*cqe));
2142 		cqe->status = CQ_REQ_STATUS_WORK_REQUEST_FLUSHED_ERR;
2143 		cqe->opcode = CQ_BASE_CQE_TYPE_REQ;
2144 		cqe->qp_handle = (u64)(unsigned long)qp;
2145 		cqe->wr_id = sq->swq[last].wr_id;
2146 		cqe->src_qp = qp->id;
2147 		cqe->type = sq->swq[last].type;
2148 		cqe++;
2149 		(*budget)--;
2150 skip_compl:
2151 		bnxt_qplib_hwq_incr_cons(&sq->hwq, sq->swq[last].slots);
2152 		sq->swq_last = sq->swq[last].next_idx;
2153 	}
2154 	*pcqe = cqe;
2155 	if (!(*budget) && sq->swq_last != start)
2156 		/* Out of budget */
2157 		rc = -EAGAIN;
2158 
2159 	return rc;
2160 }
2161 
2162 static int __flush_rq(struct bnxt_qplib_q *rq, struct bnxt_qplib_qp *qp,
2163 		      struct bnxt_qplib_cqe **pcqe, int *budget)
2164 {
2165 	struct bnxt_qplib_cqe *cqe;
2166 	u32 start, last;
2167 	int opcode = 0;
2168 	int rc = 0;
2169 
2170 	switch (qp->type) {
2171 	case CMDQ_CREATE_QP1_TYPE_GSI:
2172 		opcode = CQ_BASE_CQE_TYPE_RES_RAWETH_QP1;
2173 		break;
2174 	case CMDQ_CREATE_QP_TYPE_RC:
2175 		opcode = CQ_BASE_CQE_TYPE_RES_RC;
2176 		break;
2177 	case CMDQ_CREATE_QP_TYPE_UD:
2178 	case CMDQ_CREATE_QP_TYPE_GSI:
2179 		opcode = CQ_BASE_CQE_TYPE_RES_UD;
2180 		break;
2181 	}
2182 
2183 	/* Flush the rest of the RQ */
2184 	start = rq->swq_start;
2185 	cqe = *pcqe;
2186 	while (*budget) {
2187 		last = rq->swq_last;
2188 		if (last == start)
2189 			break;
2190 		memset(cqe, 0, sizeof(*cqe));
2191 		cqe->status =
2192 		    CQ_RES_RC_STATUS_WORK_REQUEST_FLUSHED_ERR;
2193 		cqe->opcode = opcode;
2194 		cqe->qp_handle = (unsigned long)qp;
2195 		cqe->wr_id = rq->swq[last].wr_id;
2196 		cqe++;
2197 		(*budget)--;
2198 		bnxt_qplib_hwq_incr_cons(&rq->hwq, rq->swq[last].slots);
2199 		rq->swq_last = rq->swq[last].next_idx;
2200 	}
2201 	*pcqe = cqe;
2202 	if (!*budget && rq->swq_last != start)
2203 		/* Out of budget */
2204 		rc = -EAGAIN;
2205 
2206 	return rc;
2207 }
2208 
2209 void bnxt_qplib_mark_qp_error(void *qp_handle)
2210 {
2211 	struct bnxt_qplib_qp *qp = qp_handle;
2212 
2213 	if (!qp)
2214 		return;
2215 
2216 	/* Must block new posting of SQ and RQ */
2217 	qp->state = CMDQ_MODIFY_QP_NEW_STATE_ERR;
2218 	bnxt_qplib_cancel_phantom_processing(qp);
2219 }
2220 
2221 /* Note: SQE is valid from sw_sq_cons up to cqe_sq_cons (exclusive)
2222  *       CQE is track from sw_cq_cons to max_element but valid only if VALID=1
2223  */
2224 static int do_wa9060(struct bnxt_qplib_qp *qp, struct bnxt_qplib_cq *cq,
2225 		     u32 cq_cons, u32 swq_last, u32 cqe_sq_cons)
2226 {
2227 	u32 peek_sw_cq_cons, peek_raw_cq_cons, peek_sq_cons_idx;
2228 	struct bnxt_qplib_q *sq = &qp->sq;
2229 	struct cq_req *peek_req_hwcqe;
2230 	struct bnxt_qplib_qp *peek_qp;
2231 	struct bnxt_qplib_q *peek_sq;
2232 	struct bnxt_qplib_swq *swq;
2233 	struct cq_base *peek_hwcqe;
2234 	int i, rc = 0;
2235 
2236 	/* Normal mode */
2237 	/* Check for the psn_search marking before completing */
2238 	swq = &sq->swq[swq_last];
2239 	if (swq->psn_search &&
2240 	    le32_to_cpu(swq->psn_search->flags_next_psn) & 0x80000000) {
2241 		/* Unmark */
2242 		swq->psn_search->flags_next_psn = cpu_to_le32
2243 			(le32_to_cpu(swq->psn_search->flags_next_psn)
2244 				     & ~0x80000000);
2245 		dev_dbg(&cq->hwq.pdev->dev,
2246 			"FP: Process Req cq_cons=0x%x qp=0x%x sq cons sw=0x%x cqe=0x%x marked!\n",
2247 			cq_cons, qp->id, swq_last, cqe_sq_cons);
2248 		sq->condition = true;
2249 		sq->send_phantom = true;
2250 
2251 		/* TODO: Only ARM if the previous SQE is ARMALL */
2252 		bnxt_qplib_ring_db(&cq->dbinfo, DBC_DBC_TYPE_CQ_ARMALL);
2253 		rc = -EAGAIN;
2254 		goto out;
2255 	}
2256 	if (sq->condition) {
2257 		/* Peek at the completions */
2258 		peek_raw_cq_cons = cq->hwq.cons;
2259 		peek_sw_cq_cons = cq_cons;
2260 		i = cq->hwq.max_elements;
2261 		while (i--) {
2262 			peek_sw_cq_cons = HWQ_CMP((peek_sw_cq_cons), &cq->hwq);
2263 			peek_hwcqe = bnxt_qplib_get_qe(&cq->hwq,
2264 						       peek_sw_cq_cons, NULL);
2265 			/* If the next hwcqe is VALID */
2266 			if (CQE_CMP_VALID(peek_hwcqe, peek_raw_cq_cons,
2267 					  cq->hwq.max_elements)) {
2268 			/*
2269 			 * The valid test of the entry must be done first before
2270 			 * reading any further.
2271 			 */
2272 				dma_rmb();
2273 				/* If the next hwcqe is a REQ */
2274 				if ((peek_hwcqe->cqe_type_toggle &
2275 				    CQ_BASE_CQE_TYPE_MASK) ==
2276 				    CQ_BASE_CQE_TYPE_REQ) {
2277 					peek_req_hwcqe = (struct cq_req *)
2278 							 peek_hwcqe;
2279 					peek_qp = (struct bnxt_qplib_qp *)
2280 						((unsigned long)
2281 						 le64_to_cpu
2282 						 (peek_req_hwcqe->qp_handle));
2283 					peek_sq = &peek_qp->sq;
2284 					peek_sq_cons_idx =
2285 						((le16_to_cpu(
2286 						  peek_req_hwcqe->sq_cons_idx)
2287 						  - 1) % sq->max_wqe);
2288 					/* If the hwcqe's sq's wr_id matches */
2289 					if (peek_sq == sq &&
2290 					    sq->swq[peek_sq_cons_idx].wr_id ==
2291 					    BNXT_QPLIB_FENCE_WRID) {
2292 						/*
2293 						 *  Unbreak only if the phantom
2294 						 *  comes back
2295 						 */
2296 						dev_dbg(&cq->hwq.pdev->dev,
2297 							"FP: Got Phantom CQE\n");
2298 						sq->condition = false;
2299 						sq->single = true;
2300 						rc = 0;
2301 						goto out;
2302 					}
2303 				}
2304 				/* Valid but not the phantom, so keep looping */
2305 			} else {
2306 				/* Not valid yet, just exit and wait */
2307 				rc = -EINVAL;
2308 				goto out;
2309 			}
2310 			peek_sw_cq_cons++;
2311 			peek_raw_cq_cons++;
2312 		}
2313 		dev_err(&cq->hwq.pdev->dev,
2314 			"Should not have come here! cq_cons=0x%x qp=0x%x sq cons sw=0x%x hw=0x%x\n",
2315 			cq_cons, qp->id, swq_last, cqe_sq_cons);
2316 		rc = -EINVAL;
2317 	}
2318 out:
2319 	return rc;
2320 }
2321 
2322 static int bnxt_qplib_cq_process_req(struct bnxt_qplib_cq *cq,
2323 				     struct cq_req *hwcqe,
2324 				     struct bnxt_qplib_cqe **pcqe, int *budget,
2325 				     u32 cq_cons, struct bnxt_qplib_qp **lib_qp)
2326 {
2327 	struct bnxt_qplib_swq *swq;
2328 	struct bnxt_qplib_cqe *cqe;
2329 	struct bnxt_qplib_qp *qp;
2330 	struct bnxt_qplib_q *sq;
2331 	u32 cqe_sq_cons;
2332 	int rc = 0;
2333 
2334 	qp = (struct bnxt_qplib_qp *)((unsigned long)
2335 				      le64_to_cpu(hwcqe->qp_handle));
2336 	if (!qp) {
2337 		dev_err(&cq->hwq.pdev->dev,
2338 			"FP: Process Req qp is NULL\n");
2339 		return -EINVAL;
2340 	}
2341 	sq = &qp->sq;
2342 
2343 	cqe_sq_cons = le16_to_cpu(hwcqe->sq_cons_idx) % sq->max_wqe;
2344 	if (qp->sq.flushed) {
2345 		dev_dbg(&cq->hwq.pdev->dev,
2346 			"%s: QP in Flush QP = %p\n", __func__, qp);
2347 		goto done;
2348 	}
2349 	/* Require to walk the sq's swq to fabricate CQEs for all previously
2350 	 * signaled SWQEs due to CQE aggregation from the current sq cons
2351 	 * to the cqe_sq_cons
2352 	 */
2353 	cqe = *pcqe;
2354 	while (*budget) {
2355 		if (sq->swq_last == cqe_sq_cons)
2356 			/* Done */
2357 			break;
2358 
2359 		swq = &sq->swq[sq->swq_last];
2360 		memset(cqe, 0, sizeof(*cqe));
2361 		cqe->opcode = CQ_BASE_CQE_TYPE_REQ;
2362 		cqe->qp_handle = (u64)(unsigned long)qp;
2363 		cqe->src_qp = qp->id;
2364 		cqe->wr_id = swq->wr_id;
2365 		if (cqe->wr_id == BNXT_QPLIB_FENCE_WRID)
2366 			goto skip;
2367 		cqe->type = swq->type;
2368 
2369 		/* For the last CQE, check for status.  For errors, regardless
2370 		 * of the request being signaled or not, it must complete with
2371 		 * the hwcqe error status
2372 		 */
2373 		if (swq->next_idx == cqe_sq_cons &&
2374 		    hwcqe->status != CQ_REQ_STATUS_OK) {
2375 			cqe->status = hwcqe->status;
2376 			dev_err(&cq->hwq.pdev->dev,
2377 				"FP: CQ Processed Req wr_id[%d] = 0x%llx with status 0x%x\n",
2378 				sq->swq_last, cqe->wr_id, cqe->status);
2379 			cqe++;
2380 			(*budget)--;
2381 			bnxt_qplib_mark_qp_error(qp);
2382 			/* Add qp to flush list of the CQ */
2383 			bnxt_qplib_add_flush_qp(qp);
2384 		} else {
2385 			/* Before we complete, do WA 9060 */
2386 			if (do_wa9060(qp, cq, cq_cons, sq->swq_last,
2387 				      cqe_sq_cons)) {
2388 				*lib_qp = qp;
2389 				goto out;
2390 			}
2391 			if (swq->flags & SQ_SEND_FLAGS_SIGNAL_COMP) {
2392 				cqe->status = CQ_REQ_STATUS_OK;
2393 				cqe++;
2394 				(*budget)--;
2395 			}
2396 		}
2397 skip:
2398 		bnxt_qplib_hwq_incr_cons(&sq->hwq, swq->slots);
2399 		sq->swq_last = swq->next_idx;
2400 		if (sq->single)
2401 			break;
2402 	}
2403 out:
2404 	*pcqe = cqe;
2405 	if (sq->swq_last != cqe_sq_cons) {
2406 		/* Out of budget */
2407 		rc = -EAGAIN;
2408 		goto done;
2409 	}
2410 	/*
2411 	 * Back to normal completion mode only after it has completed all of
2412 	 * the WC for this CQE
2413 	 */
2414 	sq->single = false;
2415 done:
2416 	return rc;
2417 }
2418 
2419 static void bnxt_qplib_release_srqe(struct bnxt_qplib_srq *srq, u32 tag)
2420 {
2421 	spin_lock(&srq->hwq.lock);
2422 	srq->swq[srq->last_idx].next_idx = (int)tag;
2423 	srq->last_idx = (int)tag;
2424 	srq->swq[srq->last_idx].next_idx = -1;
2425 	srq->hwq.cons++; /* Support for SRQE counter */
2426 	spin_unlock(&srq->hwq.lock);
2427 }
2428 
2429 static int bnxt_qplib_cq_process_res_rc(struct bnxt_qplib_cq *cq,
2430 					struct cq_res_rc *hwcqe,
2431 					struct bnxt_qplib_cqe **pcqe,
2432 					int *budget)
2433 {
2434 	struct bnxt_qplib_srq *srq;
2435 	struct bnxt_qplib_cqe *cqe;
2436 	struct bnxt_qplib_qp *qp;
2437 	struct bnxt_qplib_q *rq;
2438 	u32 wr_id_idx;
2439 	int rc = 0;
2440 
2441 	qp = (struct bnxt_qplib_qp *)((unsigned long)
2442 				      le64_to_cpu(hwcqe->qp_handle));
2443 	if (!qp) {
2444 		dev_err(&cq->hwq.pdev->dev, "process_cq RC qp is NULL\n");
2445 		return -EINVAL;
2446 	}
2447 	if (qp->rq.flushed) {
2448 		dev_dbg(&cq->hwq.pdev->dev,
2449 			"%s: QP in Flush QP = %p\n", __func__, qp);
2450 		goto done;
2451 	}
2452 
2453 	cqe = *pcqe;
2454 	cqe->opcode = hwcqe->cqe_type_toggle & CQ_BASE_CQE_TYPE_MASK;
2455 	cqe->length = le32_to_cpu(hwcqe->length);
2456 	cqe->invrkey = le32_to_cpu(hwcqe->imm_data_or_inv_r_key);
2457 	cqe->mr_handle = le64_to_cpu(hwcqe->mr_handle);
2458 	cqe->flags = le16_to_cpu(hwcqe->flags);
2459 	cqe->status = hwcqe->status;
2460 	cqe->qp_handle = (u64)(unsigned long)qp;
2461 
2462 	wr_id_idx = le32_to_cpu(hwcqe->srq_or_rq_wr_id) &
2463 				CQ_RES_RC_SRQ_OR_RQ_WR_ID_MASK;
2464 	if (cqe->flags & CQ_RES_RC_FLAGS_SRQ_SRQ) {
2465 		srq = qp->srq;
2466 		if (!srq)
2467 			return -EINVAL;
2468 		if (wr_id_idx >= srq->hwq.max_elements) {
2469 			dev_err(&cq->hwq.pdev->dev,
2470 				"FP: CQ Process RC wr_id idx 0x%x exceeded SRQ max 0x%x\n",
2471 				wr_id_idx, srq->hwq.max_elements);
2472 			return -EINVAL;
2473 		}
2474 		cqe->wr_id = srq->swq[wr_id_idx].wr_id;
2475 		bnxt_qplib_release_srqe(srq, wr_id_idx);
2476 		cqe++;
2477 		(*budget)--;
2478 		*pcqe = cqe;
2479 	} else {
2480 		struct bnxt_qplib_swq *swq;
2481 
2482 		rq = &qp->rq;
2483 		if (wr_id_idx > (rq->max_wqe - 1)) {
2484 			dev_err(&cq->hwq.pdev->dev,
2485 				"FP: CQ Process RC wr_id idx 0x%x exceeded RQ max 0x%x\n",
2486 				wr_id_idx, rq->max_wqe);
2487 			return -EINVAL;
2488 		}
2489 		if (wr_id_idx != rq->swq_last)
2490 			return -EINVAL;
2491 		swq = &rq->swq[rq->swq_last];
2492 		cqe->wr_id = swq->wr_id;
2493 		cqe++;
2494 		(*budget)--;
2495 		bnxt_qplib_hwq_incr_cons(&rq->hwq, swq->slots);
2496 		rq->swq_last = swq->next_idx;
2497 		*pcqe = cqe;
2498 
2499 		if (hwcqe->status != CQ_RES_RC_STATUS_OK) {
2500 			qp->state = CMDQ_MODIFY_QP_NEW_STATE_ERR;
2501 			/* Add qp to flush list of the CQ */
2502 			bnxt_qplib_add_flush_qp(qp);
2503 		}
2504 	}
2505 
2506 done:
2507 	return rc;
2508 }
2509 
2510 static int bnxt_qplib_cq_process_res_ud(struct bnxt_qplib_cq *cq,
2511 					struct cq_res_ud *hwcqe,
2512 					struct bnxt_qplib_cqe **pcqe,
2513 					int *budget)
2514 {
2515 	struct bnxt_qplib_srq *srq;
2516 	struct bnxt_qplib_cqe *cqe;
2517 	struct bnxt_qplib_qp *qp;
2518 	struct bnxt_qplib_q *rq;
2519 	u32 wr_id_idx;
2520 	int rc = 0;
2521 
2522 	qp = (struct bnxt_qplib_qp *)((unsigned long)
2523 				      le64_to_cpu(hwcqe->qp_handle));
2524 	if (!qp) {
2525 		dev_err(&cq->hwq.pdev->dev, "process_cq UD qp is NULL\n");
2526 		return -EINVAL;
2527 	}
2528 	if (qp->rq.flushed) {
2529 		dev_dbg(&cq->hwq.pdev->dev,
2530 			"%s: QP in Flush QP = %p\n", __func__, qp);
2531 		goto done;
2532 	}
2533 	cqe = *pcqe;
2534 	cqe->opcode = hwcqe->cqe_type_toggle & CQ_BASE_CQE_TYPE_MASK;
2535 	cqe->length = le16_to_cpu(hwcqe->length) & CQ_RES_UD_LENGTH_MASK;
2536 	cqe->cfa_meta = le16_to_cpu(hwcqe->cfa_metadata);
2537 	cqe->invrkey = le32_to_cpu(hwcqe->imm_data);
2538 	cqe->flags = le16_to_cpu(hwcqe->flags);
2539 	cqe->status = hwcqe->status;
2540 	cqe->qp_handle = (u64)(unsigned long)qp;
2541 	/*FIXME: Endianness fix needed for smace */
2542 	memcpy(cqe->smac, hwcqe->src_mac, ETH_ALEN);
2543 	wr_id_idx = le32_to_cpu(hwcqe->src_qp_high_srq_or_rq_wr_id)
2544 				& CQ_RES_UD_SRQ_OR_RQ_WR_ID_MASK;
2545 	cqe->src_qp = le16_to_cpu(hwcqe->src_qp_low) |
2546 				  ((le32_to_cpu(
2547 				  hwcqe->src_qp_high_srq_or_rq_wr_id) &
2548 				 CQ_RES_UD_SRC_QP_HIGH_MASK) >> 8);
2549 
2550 	if (cqe->flags & CQ_RES_RC_FLAGS_SRQ_SRQ) {
2551 		srq = qp->srq;
2552 		if (!srq)
2553 			return -EINVAL;
2554 
2555 		if (wr_id_idx >= srq->hwq.max_elements) {
2556 			dev_err(&cq->hwq.pdev->dev,
2557 				"FP: CQ Process UD wr_id idx 0x%x exceeded SRQ max 0x%x\n",
2558 				wr_id_idx, srq->hwq.max_elements);
2559 			return -EINVAL;
2560 		}
2561 		cqe->wr_id = srq->swq[wr_id_idx].wr_id;
2562 		bnxt_qplib_release_srqe(srq, wr_id_idx);
2563 		cqe++;
2564 		(*budget)--;
2565 		*pcqe = cqe;
2566 	} else {
2567 		struct bnxt_qplib_swq *swq;
2568 
2569 		rq = &qp->rq;
2570 		if (wr_id_idx > (rq->max_wqe - 1)) {
2571 			dev_err(&cq->hwq.pdev->dev,
2572 				"FP: CQ Process UD wr_id idx 0x%x exceeded RQ max 0x%x\n",
2573 				wr_id_idx, rq->max_wqe);
2574 			return -EINVAL;
2575 		}
2576 
2577 		if (rq->swq_last != wr_id_idx)
2578 			return -EINVAL;
2579 		swq = &rq->swq[rq->swq_last];
2580 		cqe->wr_id = swq->wr_id;
2581 		cqe++;
2582 		(*budget)--;
2583 		bnxt_qplib_hwq_incr_cons(&rq->hwq, swq->slots);
2584 		rq->swq_last = swq->next_idx;
2585 		*pcqe = cqe;
2586 
2587 		if (hwcqe->status != CQ_RES_RC_STATUS_OK) {
2588 			qp->state = CMDQ_MODIFY_QP_NEW_STATE_ERR;
2589 			/* Add qp to flush list of the CQ */
2590 			bnxt_qplib_add_flush_qp(qp);
2591 		}
2592 	}
2593 done:
2594 	return rc;
2595 }
2596 
2597 bool bnxt_qplib_is_cq_empty(struct bnxt_qplib_cq *cq)
2598 {
2599 	struct cq_base *hw_cqe;
2600 	u32 sw_cons, raw_cons;
2601 	bool rc = true;
2602 
2603 	raw_cons = cq->hwq.cons;
2604 	sw_cons = HWQ_CMP(raw_cons, &cq->hwq);
2605 	hw_cqe = bnxt_qplib_get_qe(&cq->hwq, sw_cons, NULL);
2606 	 /* Check for Valid bit. If the CQE is valid, return false */
2607 	rc = !CQE_CMP_VALID(hw_cqe, raw_cons, cq->hwq.max_elements);
2608 	return rc;
2609 }
2610 
2611 static int bnxt_qplib_cq_process_res_raweth_qp1(struct bnxt_qplib_cq *cq,
2612 						struct cq_res_raweth_qp1 *hwcqe,
2613 						struct bnxt_qplib_cqe **pcqe,
2614 						int *budget)
2615 {
2616 	struct bnxt_qplib_qp *qp;
2617 	struct bnxt_qplib_q *rq;
2618 	struct bnxt_qplib_srq *srq;
2619 	struct bnxt_qplib_cqe *cqe;
2620 	u32 wr_id_idx;
2621 	int rc = 0;
2622 
2623 	qp = (struct bnxt_qplib_qp *)((unsigned long)
2624 				      le64_to_cpu(hwcqe->qp_handle));
2625 	if (!qp) {
2626 		dev_err(&cq->hwq.pdev->dev, "process_cq Raw/QP1 qp is NULL\n");
2627 		return -EINVAL;
2628 	}
2629 	if (qp->rq.flushed) {
2630 		dev_dbg(&cq->hwq.pdev->dev,
2631 			"%s: QP in Flush QP = %p\n", __func__, qp);
2632 		goto done;
2633 	}
2634 	cqe = *pcqe;
2635 	cqe->opcode = hwcqe->cqe_type_toggle & CQ_BASE_CQE_TYPE_MASK;
2636 	cqe->flags = le16_to_cpu(hwcqe->flags);
2637 	cqe->qp_handle = (u64)(unsigned long)qp;
2638 
2639 	wr_id_idx =
2640 		le32_to_cpu(hwcqe->raweth_qp1_payload_offset_srq_or_rq_wr_id)
2641 				& CQ_RES_RAWETH_QP1_SRQ_OR_RQ_WR_ID_MASK;
2642 	cqe->src_qp = qp->id;
2643 	if (qp->id == 1 && !cqe->length) {
2644 		/* Add workaround for the length misdetection */
2645 		cqe->length = 296;
2646 	} else {
2647 		cqe->length = le16_to_cpu(hwcqe->length);
2648 	}
2649 	cqe->pkey_index = qp->pkey_index;
2650 	memcpy(cqe->smac, qp->smac, 6);
2651 
2652 	cqe->raweth_qp1_flags = le16_to_cpu(hwcqe->raweth_qp1_flags);
2653 	cqe->raweth_qp1_flags2 = le32_to_cpu(hwcqe->raweth_qp1_flags2);
2654 	cqe->raweth_qp1_metadata = le32_to_cpu(hwcqe->raweth_qp1_metadata);
2655 
2656 	if (cqe->flags & CQ_RES_RAWETH_QP1_FLAGS_SRQ_SRQ) {
2657 		srq = qp->srq;
2658 		if (!srq) {
2659 			dev_err(&cq->hwq.pdev->dev,
2660 				"FP: SRQ used but not defined??\n");
2661 			return -EINVAL;
2662 		}
2663 		if (wr_id_idx >= srq->hwq.max_elements) {
2664 			dev_err(&cq->hwq.pdev->dev,
2665 				"FP: CQ Process Raw/QP1 wr_id idx 0x%x exceeded SRQ max 0x%x\n",
2666 				wr_id_idx, srq->hwq.max_elements);
2667 			return -EINVAL;
2668 		}
2669 		cqe->wr_id = srq->swq[wr_id_idx].wr_id;
2670 		bnxt_qplib_release_srqe(srq, wr_id_idx);
2671 		cqe++;
2672 		(*budget)--;
2673 		*pcqe = cqe;
2674 	} else {
2675 		struct bnxt_qplib_swq *swq;
2676 
2677 		rq = &qp->rq;
2678 		if (wr_id_idx > (rq->max_wqe - 1)) {
2679 			dev_err(&cq->hwq.pdev->dev,
2680 				"FP: CQ Process Raw/QP1 RQ wr_id idx 0x%x exceeded RQ max 0x%x\n",
2681 				wr_id_idx, rq->max_wqe);
2682 			return -EINVAL;
2683 		}
2684 		if (rq->swq_last != wr_id_idx)
2685 			return -EINVAL;
2686 		swq = &rq->swq[rq->swq_last];
2687 		cqe->wr_id = swq->wr_id;
2688 		cqe++;
2689 		(*budget)--;
2690 		bnxt_qplib_hwq_incr_cons(&rq->hwq, swq->slots);
2691 		rq->swq_last = swq->next_idx;
2692 		*pcqe = cqe;
2693 
2694 		if (hwcqe->status != CQ_RES_RC_STATUS_OK) {
2695 			qp->state = CMDQ_MODIFY_QP_NEW_STATE_ERR;
2696 			/* Add qp to flush list of the CQ */
2697 			bnxt_qplib_add_flush_qp(qp);
2698 		}
2699 	}
2700 
2701 done:
2702 	return rc;
2703 }
2704 
2705 static int bnxt_qplib_cq_process_terminal(struct bnxt_qplib_cq *cq,
2706 					  struct cq_terminal *hwcqe,
2707 					  struct bnxt_qplib_cqe **pcqe,
2708 					  int *budget)
2709 {
2710 	struct bnxt_qplib_qp *qp;
2711 	struct bnxt_qplib_q *sq, *rq;
2712 	struct bnxt_qplib_cqe *cqe;
2713 	u32 swq_last = 0, cqe_cons;
2714 	int rc = 0;
2715 
2716 	/* Check the Status */
2717 	if (hwcqe->status != CQ_TERMINAL_STATUS_OK)
2718 		dev_warn(&cq->hwq.pdev->dev,
2719 			 "FP: CQ Process Terminal Error status = 0x%x\n",
2720 			 hwcqe->status);
2721 
2722 	qp = (struct bnxt_qplib_qp *)((unsigned long)
2723 				      le64_to_cpu(hwcqe->qp_handle));
2724 	if (!qp) {
2725 		dev_err(&cq->hwq.pdev->dev,
2726 			"FP: CQ Process terminal qp is NULL\n");
2727 		return -EINVAL;
2728 	}
2729 
2730 	/* Must block new posting of SQ and RQ */
2731 	qp->state = CMDQ_MODIFY_QP_NEW_STATE_ERR;
2732 
2733 	sq = &qp->sq;
2734 	rq = &qp->rq;
2735 
2736 	cqe_cons = le16_to_cpu(hwcqe->sq_cons_idx);
2737 	if (cqe_cons == 0xFFFF)
2738 		goto do_rq;
2739 	cqe_cons %= sq->max_wqe;
2740 
2741 	if (qp->sq.flushed) {
2742 		dev_dbg(&cq->hwq.pdev->dev,
2743 			"%s: QP in Flush QP = %p\n", __func__, qp);
2744 		goto sq_done;
2745 	}
2746 
2747 	/* Terminal CQE can also include aggregated successful CQEs prior.
2748 	 * So we must complete all CQEs from the current sq's cons to the
2749 	 * cq_cons with status OK
2750 	 */
2751 	cqe = *pcqe;
2752 	while (*budget) {
2753 		swq_last = sq->swq_last;
2754 		if (swq_last == cqe_cons)
2755 			break;
2756 		if (sq->swq[swq_last].flags & SQ_SEND_FLAGS_SIGNAL_COMP) {
2757 			memset(cqe, 0, sizeof(*cqe));
2758 			cqe->status = CQ_REQ_STATUS_OK;
2759 			cqe->opcode = CQ_BASE_CQE_TYPE_REQ;
2760 			cqe->qp_handle = (u64)(unsigned long)qp;
2761 			cqe->src_qp = qp->id;
2762 			cqe->wr_id = sq->swq[swq_last].wr_id;
2763 			cqe->type = sq->swq[swq_last].type;
2764 			cqe++;
2765 			(*budget)--;
2766 		}
2767 		bnxt_qplib_hwq_incr_cons(&sq->hwq, sq->swq[swq_last].slots);
2768 		sq->swq_last = sq->swq[swq_last].next_idx;
2769 	}
2770 	*pcqe = cqe;
2771 	if (!(*budget) && swq_last != cqe_cons) {
2772 		/* Out of budget */
2773 		rc = -EAGAIN;
2774 		goto sq_done;
2775 	}
2776 sq_done:
2777 	if (rc)
2778 		return rc;
2779 do_rq:
2780 	cqe_cons = le16_to_cpu(hwcqe->rq_cons_idx);
2781 	if (cqe_cons == 0xFFFF) {
2782 		goto done;
2783 	} else if (cqe_cons > rq->max_wqe - 1) {
2784 		dev_err(&cq->hwq.pdev->dev,
2785 			"FP: CQ Processed terminal reported rq_cons_idx 0x%x exceeds max 0x%x\n",
2786 			cqe_cons, rq->max_wqe);
2787 		rc = -EINVAL;
2788 		goto done;
2789 	}
2790 
2791 	if (qp->rq.flushed) {
2792 		dev_dbg(&cq->hwq.pdev->dev,
2793 			"%s: QP in Flush QP = %p\n", __func__, qp);
2794 		rc = 0;
2795 		goto done;
2796 	}
2797 
2798 	/* Terminal CQE requires all posted RQEs to complete with FLUSHED_ERR
2799 	 * from the current rq->cons to the rq->prod regardless what the
2800 	 * rq->cons the terminal CQE indicates
2801 	 */
2802 
2803 	/* Add qp to flush list of the CQ */
2804 	bnxt_qplib_add_flush_qp(qp);
2805 done:
2806 	return rc;
2807 }
2808 
2809 static int bnxt_qplib_cq_process_cutoff(struct bnxt_qplib_cq *cq,
2810 					struct cq_cutoff *hwcqe)
2811 {
2812 	/* Check the Status */
2813 	if (hwcqe->status != CQ_CUTOFF_STATUS_OK) {
2814 		dev_err(&cq->hwq.pdev->dev,
2815 			"FP: CQ Process Cutoff Error status = 0x%x\n",
2816 			hwcqe->status);
2817 		return -EINVAL;
2818 	}
2819 	clear_bit(CQ_FLAGS_RESIZE_IN_PROG, &cq->flags);
2820 	wake_up_interruptible(&cq->waitq);
2821 
2822 	return 0;
2823 }
2824 
2825 int bnxt_qplib_process_flush_list(struct bnxt_qplib_cq *cq,
2826 				  struct bnxt_qplib_cqe *cqe,
2827 				  int num_cqes)
2828 {
2829 	struct bnxt_qplib_qp *qp = NULL;
2830 	u32 budget = num_cqes;
2831 	unsigned long flags;
2832 
2833 	spin_lock_irqsave(&cq->flush_lock, flags);
2834 	list_for_each_entry(qp, &cq->sqf_head, sq_flush) {
2835 		dev_dbg(&cq->hwq.pdev->dev, "FP: Flushing SQ QP= %p\n", qp);
2836 		__flush_sq(&qp->sq, qp, &cqe, &budget);
2837 	}
2838 
2839 	list_for_each_entry(qp, &cq->rqf_head, rq_flush) {
2840 		dev_dbg(&cq->hwq.pdev->dev, "FP: Flushing RQ QP= %p\n", qp);
2841 		__flush_rq(&qp->rq, qp, &cqe, &budget);
2842 	}
2843 	spin_unlock_irqrestore(&cq->flush_lock, flags);
2844 
2845 	return num_cqes - budget;
2846 }
2847 
2848 int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe,
2849 		       int num_cqes, struct bnxt_qplib_qp **lib_qp)
2850 {
2851 	struct cq_base *hw_cqe;
2852 	u32 sw_cons, raw_cons;
2853 	int budget, rc = 0;
2854 
2855 	raw_cons = cq->hwq.cons;
2856 	budget = num_cqes;
2857 
2858 	while (budget) {
2859 		sw_cons = HWQ_CMP(raw_cons, &cq->hwq);
2860 		hw_cqe = bnxt_qplib_get_qe(&cq->hwq, sw_cons, NULL);
2861 
2862 		/* Check for Valid bit */
2863 		if (!CQE_CMP_VALID(hw_cqe, raw_cons, cq->hwq.max_elements))
2864 			break;
2865 
2866 		/*
2867 		 * The valid test of the entry must be done first before
2868 		 * reading any further.
2869 		 */
2870 		dma_rmb();
2871 		/* From the device's respective CQE format to qplib_wc*/
2872 		switch (hw_cqe->cqe_type_toggle & CQ_BASE_CQE_TYPE_MASK) {
2873 		case CQ_BASE_CQE_TYPE_REQ:
2874 			rc = bnxt_qplib_cq_process_req(cq,
2875 						       (struct cq_req *)hw_cqe,
2876 						       &cqe, &budget,
2877 						       sw_cons, lib_qp);
2878 			break;
2879 		case CQ_BASE_CQE_TYPE_RES_RC:
2880 			rc = bnxt_qplib_cq_process_res_rc(cq,
2881 							  (struct cq_res_rc *)
2882 							  hw_cqe, &cqe,
2883 							  &budget);
2884 			break;
2885 		case CQ_BASE_CQE_TYPE_RES_UD:
2886 			rc = bnxt_qplib_cq_process_res_ud
2887 					(cq, (struct cq_res_ud *)hw_cqe, &cqe,
2888 					 &budget);
2889 			break;
2890 		case CQ_BASE_CQE_TYPE_RES_RAWETH_QP1:
2891 			rc = bnxt_qplib_cq_process_res_raweth_qp1
2892 					(cq, (struct cq_res_raweth_qp1 *)
2893 					 hw_cqe, &cqe, &budget);
2894 			break;
2895 		case CQ_BASE_CQE_TYPE_TERMINAL:
2896 			rc = bnxt_qplib_cq_process_terminal
2897 					(cq, (struct cq_terminal *)hw_cqe,
2898 					 &cqe, &budget);
2899 			break;
2900 		case CQ_BASE_CQE_TYPE_CUT_OFF:
2901 			bnxt_qplib_cq_process_cutoff
2902 					(cq, (struct cq_cutoff *)hw_cqe);
2903 			/* Done processing this CQ */
2904 			goto exit;
2905 		default:
2906 			dev_err(&cq->hwq.pdev->dev,
2907 				"process_cq unknown type 0x%lx\n",
2908 				hw_cqe->cqe_type_toggle &
2909 				CQ_BASE_CQE_TYPE_MASK);
2910 			rc = -EINVAL;
2911 			break;
2912 		}
2913 		if (rc < 0) {
2914 			if (rc == -EAGAIN)
2915 				break;
2916 			/* Error while processing the CQE, just skip to the
2917 			 * next one
2918 			 */
2919 			dev_err(&cq->hwq.pdev->dev,
2920 				"process_cqe error rc = 0x%x\n", rc);
2921 		}
2922 		raw_cons++;
2923 	}
2924 	if (cq->hwq.cons != raw_cons) {
2925 		cq->hwq.cons = raw_cons;
2926 		bnxt_qplib_ring_db(&cq->dbinfo, DBC_DBC_TYPE_CQ);
2927 	}
2928 exit:
2929 	return num_cqes - budget;
2930 }
2931 
2932 void bnxt_qplib_req_notify_cq(struct bnxt_qplib_cq *cq, u32 arm_type)
2933 {
2934 	if (arm_type)
2935 		bnxt_qplib_ring_db(&cq->dbinfo, arm_type);
2936 	/* Using cq->arm_state variable to track whether to issue cq handler */
2937 	atomic_set(&cq->arm_state, 1);
2938 }
2939 
2940 void bnxt_qplib_flush_cqn_wq(struct bnxt_qplib_qp *qp)
2941 {
2942 	flush_workqueue(qp->scq->nq->cqn_wq);
2943 	if (qp->scq != qp->rcq)
2944 		flush_workqueue(qp->rcq->nq->cqn_wq);
2945 }
2946