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: RDMA Controller HW interface
37  */
38 
39 #define dev_fmt(fmt) "QPLIB: " fmt
40 
41 #include <linux/interrupt.h>
42 #include <linux/spinlock.h>
43 #include <linux/pci.h>
44 #include <linux/prefetch.h>
45 #include <linux/delay.h>
46 
47 #include "roce_hsi.h"
48 #include "qplib_res.h"
49 #include "qplib_rcfw.h"
50 #include "qplib_sp.h"
51 #include "qplib_fp.h"
52 
53 static void bnxt_qplib_service_creq(struct tasklet_struct *t);
54 
55 /* Hardware communication channel */
56 static int __wait_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie)
57 {
58 	struct bnxt_qplib_cmdq_ctx *cmdq;
59 	u16 cbit;
60 	int rc;
61 
62 	cmdq = &rcfw->cmdq;
63 	cbit = cookie % rcfw->cmdq_depth;
64 	rc = wait_event_timeout(cmdq->waitq,
65 				!test_bit(cbit, cmdq->cmdq_bitmap),
66 				msecs_to_jiffies(RCFW_CMD_WAIT_TIME_MS));
67 	return rc ? 0 : -ETIMEDOUT;
68 };
69 
70 static int __block_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie)
71 {
72 	u32 count = RCFW_BLOCKED_CMD_WAIT_COUNT;
73 	struct bnxt_qplib_cmdq_ctx *cmdq;
74 	u16 cbit;
75 
76 	cmdq = &rcfw->cmdq;
77 	cbit = cookie % rcfw->cmdq_depth;
78 	if (!test_bit(cbit, cmdq->cmdq_bitmap))
79 		goto done;
80 	do {
81 		mdelay(1); /* 1m sec */
82 		bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet);
83 	} while (test_bit(cbit, cmdq->cmdq_bitmap) && --count);
84 done:
85 	return count ? 0 : -ETIMEDOUT;
86 };
87 
88 static int __send_message(struct bnxt_qplib_rcfw *rcfw, struct cmdq_base *req,
89 			  struct creq_base *resp, void *sb, u8 is_block)
90 {
91 	struct bnxt_qplib_cmdq_ctx *cmdq = &rcfw->cmdq;
92 	struct bnxt_qplib_hwq *hwq = &cmdq->hwq;
93 	struct bnxt_qplib_crsqe *crsqe;
94 	struct bnxt_qplib_cmdqe *cmdqe;
95 	u32 sw_prod, cmdq_prod;
96 	struct pci_dev *pdev;
97 	unsigned long flags;
98 	u32 size, opcode;
99 	u16 cookie, cbit;
100 	u8 *preq;
101 
102 	pdev = rcfw->pdev;
103 
104 	opcode = req->opcode;
105 	if (!test_bit(FIRMWARE_INITIALIZED_FLAG, &cmdq->flags) &&
106 	    (opcode != CMDQ_BASE_OPCODE_QUERY_FUNC &&
107 	     opcode != CMDQ_BASE_OPCODE_INITIALIZE_FW &&
108 	     opcode != CMDQ_BASE_OPCODE_QUERY_VERSION)) {
109 		dev_err(&pdev->dev,
110 			"RCFW not initialized, reject opcode 0x%x\n", opcode);
111 		return -EINVAL;
112 	}
113 
114 	if (test_bit(FIRMWARE_INITIALIZED_FLAG, &cmdq->flags) &&
115 	    opcode == CMDQ_BASE_OPCODE_INITIALIZE_FW) {
116 		dev_err(&pdev->dev, "RCFW already initialized!\n");
117 		return -EINVAL;
118 	}
119 
120 	if (test_bit(FIRMWARE_TIMED_OUT, &cmdq->flags))
121 		return -ETIMEDOUT;
122 
123 	/* Cmdq are in 16-byte units, each request can consume 1 or more
124 	 * cmdqe
125 	 */
126 	spin_lock_irqsave(&hwq->lock, flags);
127 	if (req->cmd_size >= HWQ_FREE_SLOTS(hwq)) {
128 		dev_err(&pdev->dev, "RCFW: CMDQ is full!\n");
129 		spin_unlock_irqrestore(&hwq->lock, flags);
130 		return -EAGAIN;
131 	}
132 
133 
134 	cookie = cmdq->seq_num & RCFW_MAX_COOKIE_VALUE;
135 	cbit = cookie % rcfw->cmdq_depth;
136 	if (is_block)
137 		cookie |= RCFW_CMD_IS_BLOCKING;
138 
139 	set_bit(cbit, cmdq->cmdq_bitmap);
140 	req->cookie = cpu_to_le16(cookie);
141 	crsqe = &rcfw->crsqe_tbl[cbit];
142 	if (crsqe->resp) {
143 		spin_unlock_irqrestore(&hwq->lock, flags);
144 		return -EBUSY;
145 	}
146 
147 	size = req->cmd_size;
148 	/* change the cmd_size to the number of 16byte cmdq unit.
149 	 * req->cmd_size is modified here
150 	 */
151 	bnxt_qplib_set_cmd_slots(req);
152 
153 	memset(resp, 0, sizeof(*resp));
154 	crsqe->resp = (struct creq_qp_event *)resp;
155 	crsqe->resp->cookie = req->cookie;
156 	crsqe->req_size = req->cmd_size;
157 	if (req->resp_size && sb) {
158 		struct bnxt_qplib_rcfw_sbuf *sbuf = sb;
159 
160 		req->resp_addr = cpu_to_le64(sbuf->dma_addr);
161 		req->resp_size = (sbuf->size + BNXT_QPLIB_CMDQE_UNITS - 1) /
162 				  BNXT_QPLIB_CMDQE_UNITS;
163 	}
164 
165 	preq = (u8 *)req;
166 	do {
167 		/* Locate the next cmdq slot */
168 		sw_prod = HWQ_CMP(hwq->prod, hwq);
169 		cmdqe = bnxt_qplib_get_qe(hwq, sw_prod, NULL);
170 		if (!cmdqe) {
171 			dev_err(&pdev->dev,
172 				"RCFW request failed with no cmdqe!\n");
173 			goto done;
174 		}
175 		/* Copy a segment of the req cmd to the cmdq */
176 		memset(cmdqe, 0, sizeof(*cmdqe));
177 		memcpy(cmdqe, preq, min_t(u32, size, sizeof(*cmdqe)));
178 		preq += min_t(u32, size, sizeof(*cmdqe));
179 		size -= min_t(u32, size, sizeof(*cmdqe));
180 		hwq->prod++;
181 	} while (size > 0);
182 	cmdq->seq_num++;
183 
184 	cmdq_prod = hwq->prod;
185 	if (test_bit(FIRMWARE_FIRST_FLAG, &cmdq->flags)) {
186 		/* The very first doorbell write
187 		 * is required to set this flag
188 		 * which prompts the FW to reset
189 		 * its internal pointers
190 		 */
191 		cmdq_prod |= BIT(FIRMWARE_FIRST_FLAG);
192 		clear_bit(FIRMWARE_FIRST_FLAG, &cmdq->flags);
193 	}
194 
195 	/* ring CMDQ DB */
196 	wmb();
197 	writel(cmdq_prod, cmdq->cmdq_mbox.prod);
198 	writel(RCFW_CMDQ_TRIG_VAL, cmdq->cmdq_mbox.db);
199 done:
200 	spin_unlock_irqrestore(&hwq->lock, flags);
201 	/* Return the CREQ response pointer */
202 	return 0;
203 }
204 
205 int bnxt_qplib_rcfw_send_message(struct bnxt_qplib_rcfw *rcfw,
206 				 struct cmdq_base *req,
207 				 struct creq_base *resp,
208 				 void *sb, u8 is_block)
209 {
210 	struct creq_qp_event *evnt = (struct creq_qp_event *)resp;
211 	u16 cookie;
212 	u8 opcode, retry_cnt = 0xFF;
213 	int rc = 0;
214 
215 	/* Prevent posting if f/w is not in a state to process */
216 	if (test_bit(ERR_DEVICE_DETACHED, &rcfw->cmdq.flags))
217 		return 0;
218 
219 	do {
220 		opcode = req->opcode;
221 		rc = __send_message(rcfw, req, resp, sb, is_block);
222 		cookie = le16_to_cpu(req->cookie) & RCFW_MAX_COOKIE_VALUE;
223 		if (!rc)
224 			break;
225 
226 		if (!retry_cnt || (rc != -EAGAIN && rc != -EBUSY)) {
227 			/* send failed */
228 			dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x send failed\n",
229 				cookie, opcode);
230 			return rc;
231 		}
232 		is_block ? mdelay(1) : usleep_range(500, 1000);
233 
234 	} while (retry_cnt--);
235 
236 	if (is_block)
237 		rc = __block_for_resp(rcfw, cookie);
238 	else
239 		rc = __wait_for_resp(rcfw, cookie);
240 	if (rc) {
241 		/* timed out */
242 		dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x timedout (%d)msec\n",
243 			cookie, opcode, RCFW_CMD_WAIT_TIME_MS);
244 		set_bit(FIRMWARE_TIMED_OUT, &rcfw->cmdq.flags);
245 		return rc;
246 	}
247 
248 	if (evnt->status) {
249 		/* failed with status */
250 		dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x status %#x\n",
251 			cookie, opcode, evnt->status);
252 		rc = -EFAULT;
253 	}
254 
255 	return rc;
256 }
257 /* Completions */
258 static int bnxt_qplib_process_func_event(struct bnxt_qplib_rcfw *rcfw,
259 					 struct creq_func_event *func_event)
260 {
261 	int rc;
262 
263 	switch (func_event->event) {
264 	case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
265 		break;
266 	case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
267 		break;
268 	case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
269 		break;
270 	case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
271 		break;
272 	case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
273 		break;
274 	case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
275 		break;
276 	case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
277 		break;
278 	case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
279 		/* SRQ ctx error, call srq_handler??
280 		 * But there's no SRQ handle!
281 		 */
282 		break;
283 	case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
284 		break;
285 	case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
286 		break;
287 	case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
288 		break;
289 	case CREQ_FUNC_EVENT_EVENT_VF_COMM_REQUEST:
290 		break;
291 	case CREQ_FUNC_EVENT_EVENT_RESOURCE_EXHAUSTED:
292 		break;
293 	default:
294 		return -EINVAL;
295 	}
296 
297 	rc = rcfw->creq.aeq_handler(rcfw, (void *)func_event, NULL);
298 	return rc;
299 }
300 
301 static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw,
302 				       struct creq_qp_event *qp_event)
303 {
304 	struct creq_qp_error_notification *err_event;
305 	struct bnxt_qplib_hwq *hwq = &rcfw->cmdq.hwq;
306 	struct bnxt_qplib_crsqe *crsqe;
307 	struct bnxt_qplib_qp *qp;
308 	u16 cbit, blocked = 0;
309 	struct pci_dev *pdev;
310 	unsigned long flags;
311 	__le16  mcookie;
312 	u16 cookie;
313 	int rc = 0;
314 	u32 qp_id, tbl_indx;
315 
316 	pdev = rcfw->pdev;
317 	switch (qp_event->event) {
318 	case CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION:
319 		err_event = (struct creq_qp_error_notification *)qp_event;
320 		qp_id = le32_to_cpu(err_event->xid);
321 		tbl_indx = map_qp_id_to_tbl_indx(qp_id, rcfw);
322 		qp = rcfw->qp_tbl[tbl_indx].qp_handle;
323 		dev_dbg(&pdev->dev, "Received QP error notification\n");
324 		dev_dbg(&pdev->dev,
325 			"qpid 0x%x, req_err=0x%x, resp_err=0x%x\n",
326 			qp_id, err_event->req_err_state_reason,
327 			err_event->res_err_state_reason);
328 		if (!qp)
329 			break;
330 		bnxt_qplib_mark_qp_error(qp);
331 		rc = rcfw->creq.aeq_handler(rcfw, qp_event, qp);
332 		break;
333 	default:
334 		/*
335 		 * Command Response
336 		 * cmdq->lock needs to be acquired to synchronie
337 		 * the command send and completion reaping. This function
338 		 * is always called with creq->lock held. Using
339 		 * the nested variant of spin_lock.
340 		 *
341 		 */
342 
343 		spin_lock_irqsave_nested(&hwq->lock, flags,
344 					 SINGLE_DEPTH_NESTING);
345 		cookie = le16_to_cpu(qp_event->cookie);
346 		mcookie = qp_event->cookie;
347 		blocked = cookie & RCFW_CMD_IS_BLOCKING;
348 		cookie &= RCFW_MAX_COOKIE_VALUE;
349 		cbit = cookie % rcfw->cmdq_depth;
350 		crsqe = &rcfw->crsqe_tbl[cbit];
351 		if (crsqe->resp &&
352 		    crsqe->resp->cookie  == mcookie) {
353 			memcpy(crsqe->resp, qp_event, sizeof(*qp_event));
354 			crsqe->resp = NULL;
355 		} else {
356 			if (crsqe->resp && crsqe->resp->cookie)
357 				dev_err(&pdev->dev,
358 					"CMD %s cookie sent=%#x, recd=%#x\n",
359 					crsqe->resp ? "mismatch" : "collision",
360 					crsqe->resp ? crsqe->resp->cookie : 0,
361 					mcookie);
362 		}
363 		if (!test_and_clear_bit(cbit, rcfw->cmdq.cmdq_bitmap))
364 			dev_warn(&pdev->dev,
365 				 "CMD bit %d was not requested\n", cbit);
366 		hwq->cons += crsqe->req_size;
367 		crsqe->req_size = 0;
368 
369 		if (!blocked)
370 			wake_up(&rcfw->cmdq.waitq);
371 		spin_unlock_irqrestore(&hwq->lock, flags);
372 	}
373 	return rc;
374 }
375 
376 /* SP - CREQ Completion handlers */
377 static void bnxt_qplib_service_creq(struct tasklet_struct *t)
378 {
379 	struct bnxt_qplib_rcfw *rcfw = from_tasklet(rcfw, t, creq.creq_tasklet);
380 	struct bnxt_qplib_creq_ctx *creq = &rcfw->creq;
381 	u32 type, budget = CREQ_ENTRY_POLL_BUDGET;
382 	struct bnxt_qplib_hwq *hwq = &creq->hwq;
383 	struct creq_base *creqe;
384 	u32 sw_cons, raw_cons;
385 	unsigned long flags;
386 
387 	/* Service the CREQ until budget is over */
388 	spin_lock_irqsave(&hwq->lock, flags);
389 	raw_cons = hwq->cons;
390 	while (budget > 0) {
391 		sw_cons = HWQ_CMP(raw_cons, hwq);
392 		creqe = bnxt_qplib_get_qe(hwq, sw_cons, NULL);
393 		if (!CREQ_CMP_VALID(creqe, raw_cons, hwq->max_elements))
394 			break;
395 		/* The valid test of the entry must be done first before
396 		 * reading any further.
397 		 */
398 		dma_rmb();
399 
400 		type = creqe->type & CREQ_BASE_TYPE_MASK;
401 		switch (type) {
402 		case CREQ_BASE_TYPE_QP_EVENT:
403 			bnxt_qplib_process_qp_event
404 				(rcfw, (struct creq_qp_event *)creqe);
405 			creq->stats.creq_qp_event_processed++;
406 			break;
407 		case CREQ_BASE_TYPE_FUNC_EVENT:
408 			if (!bnxt_qplib_process_func_event
409 			    (rcfw, (struct creq_func_event *)creqe))
410 				creq->stats.creq_func_event_processed++;
411 			else
412 				dev_warn(&rcfw->pdev->dev,
413 					 "aeqe:%#x Not handled\n", type);
414 			break;
415 		default:
416 			if (type != ASYNC_EVENT_CMPL_TYPE_HWRM_ASYNC_EVENT)
417 				dev_warn(&rcfw->pdev->dev,
418 					 "creqe with event 0x%x not handled\n",
419 					 type);
420 			break;
421 		}
422 		raw_cons++;
423 		budget--;
424 	}
425 
426 	if (hwq->cons != raw_cons) {
427 		hwq->cons = raw_cons;
428 		bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo,
429 				      rcfw->res->cctx, true);
430 	}
431 	spin_unlock_irqrestore(&hwq->lock, flags);
432 }
433 
434 static irqreturn_t bnxt_qplib_creq_irq(int irq, void *dev_instance)
435 {
436 	struct bnxt_qplib_rcfw *rcfw = dev_instance;
437 	struct bnxt_qplib_creq_ctx *creq;
438 	struct bnxt_qplib_hwq *hwq;
439 	u32 sw_cons;
440 
441 	creq = &rcfw->creq;
442 	hwq = &creq->hwq;
443 	/* Prefetch the CREQ element */
444 	sw_cons = HWQ_CMP(hwq->cons, hwq);
445 	prefetch(bnxt_qplib_get_qe(hwq, sw_cons, NULL));
446 
447 	tasklet_schedule(&creq->creq_tasklet);
448 
449 	return IRQ_HANDLED;
450 }
451 
452 /* RCFW */
453 int bnxt_qplib_deinit_rcfw(struct bnxt_qplib_rcfw *rcfw)
454 {
455 	struct cmdq_deinitialize_fw req;
456 	struct creq_deinitialize_fw_resp resp;
457 	u16 cmd_flags = 0;
458 	int rc;
459 
460 	RCFW_CMD_PREP(req, DEINITIALIZE_FW, cmd_flags);
461 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp,
462 					  NULL, 0);
463 	if (rc)
464 		return rc;
465 
466 	clear_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->cmdq.flags);
467 	return 0;
468 }
469 
470 int bnxt_qplib_init_rcfw(struct bnxt_qplib_rcfw *rcfw,
471 			 struct bnxt_qplib_ctx *ctx, int is_virtfn)
472 {
473 	struct creq_initialize_fw_resp resp;
474 	struct cmdq_initialize_fw req;
475 	u16 cmd_flags = 0;
476 	u8 pgsz, lvl;
477 	int rc;
478 
479 	RCFW_CMD_PREP(req, INITIALIZE_FW, cmd_flags);
480 	/* Supply (log-base-2-of-host-page-size - base-page-shift)
481 	 * to bono to adjust the doorbell page sizes.
482 	 */
483 	req.log2_dbr_pg_size = cpu_to_le16(PAGE_SHIFT -
484 					   RCFW_DBR_BASE_PAGE_SHIFT);
485 	/*
486 	 * Gen P5 devices doesn't require this allocation
487 	 * as the L2 driver does the same for RoCE also.
488 	 * Also, VFs need not setup the HW context area, PF
489 	 * shall setup this area for VF. Skipping the
490 	 * HW programming
491 	 */
492 	if (is_virtfn)
493 		goto skip_ctx_setup;
494 	if (bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx))
495 		goto config_vf_res;
496 
497 	lvl = ctx->qpc_tbl.level;
498 	pgsz = bnxt_qplib_base_pg_size(&ctx->qpc_tbl);
499 	req.qpc_pg_size_qpc_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) |
500 				   lvl;
501 	lvl = ctx->mrw_tbl.level;
502 	pgsz = bnxt_qplib_base_pg_size(&ctx->mrw_tbl);
503 	req.mrw_pg_size_mrw_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) |
504 				   lvl;
505 	lvl = ctx->srqc_tbl.level;
506 	pgsz = bnxt_qplib_base_pg_size(&ctx->srqc_tbl);
507 	req.srq_pg_size_srq_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) |
508 				   lvl;
509 	lvl = ctx->cq_tbl.level;
510 	pgsz = bnxt_qplib_base_pg_size(&ctx->cq_tbl);
511 	req.cq_pg_size_cq_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) |
512 				 lvl;
513 	lvl = ctx->tim_tbl.level;
514 	pgsz = bnxt_qplib_base_pg_size(&ctx->tim_tbl);
515 	req.tim_pg_size_tim_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) |
516 				   lvl;
517 	lvl = ctx->tqm_ctx.pde.level;
518 	pgsz = bnxt_qplib_base_pg_size(&ctx->tqm_ctx.pde);
519 	req.tqm_pg_size_tqm_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) |
520 				   lvl;
521 	req.qpc_page_dir =
522 		cpu_to_le64(ctx->qpc_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
523 	req.mrw_page_dir =
524 		cpu_to_le64(ctx->mrw_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
525 	req.srq_page_dir =
526 		cpu_to_le64(ctx->srqc_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
527 	req.cq_page_dir =
528 		cpu_to_le64(ctx->cq_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
529 	req.tim_page_dir =
530 		cpu_to_le64(ctx->tim_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
531 	req.tqm_page_dir =
532 		cpu_to_le64(ctx->tqm_ctx.pde.pbl[PBL_LVL_0].pg_map_arr[0]);
533 
534 	req.number_of_qp = cpu_to_le32(ctx->qpc_tbl.max_elements);
535 	req.number_of_mrw = cpu_to_le32(ctx->mrw_tbl.max_elements);
536 	req.number_of_srq = cpu_to_le32(ctx->srqc_tbl.max_elements);
537 	req.number_of_cq = cpu_to_le32(ctx->cq_tbl.max_elements);
538 
539 config_vf_res:
540 	req.max_qp_per_vf = cpu_to_le32(ctx->vf_res.max_qp_per_vf);
541 	req.max_mrw_per_vf = cpu_to_le32(ctx->vf_res.max_mrw_per_vf);
542 	req.max_srq_per_vf = cpu_to_le32(ctx->vf_res.max_srq_per_vf);
543 	req.max_cq_per_vf = cpu_to_le32(ctx->vf_res.max_cq_per_vf);
544 	req.max_gid_per_vf = cpu_to_le32(ctx->vf_res.max_gid_per_vf);
545 
546 skip_ctx_setup:
547 	req.stat_ctx_id = cpu_to_le32(ctx->stats.fw_id);
548 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp,
549 					  NULL, 0);
550 	if (rc)
551 		return rc;
552 	set_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->cmdq.flags);
553 	return 0;
554 }
555 
556 void bnxt_qplib_free_rcfw_channel(struct bnxt_qplib_rcfw *rcfw)
557 {
558 	kfree(rcfw->cmdq.cmdq_bitmap);
559 	kfree(rcfw->qp_tbl);
560 	kfree(rcfw->crsqe_tbl);
561 	bnxt_qplib_free_hwq(rcfw->res, &rcfw->cmdq.hwq);
562 	bnxt_qplib_free_hwq(rcfw->res, &rcfw->creq.hwq);
563 	rcfw->pdev = NULL;
564 }
565 
566 int bnxt_qplib_alloc_rcfw_channel(struct bnxt_qplib_res *res,
567 				  struct bnxt_qplib_rcfw *rcfw,
568 				  struct bnxt_qplib_ctx *ctx,
569 				  int qp_tbl_sz)
570 {
571 	struct bnxt_qplib_hwq_attr hwq_attr = {};
572 	struct bnxt_qplib_sg_info sginfo = {};
573 	struct bnxt_qplib_cmdq_ctx *cmdq;
574 	struct bnxt_qplib_creq_ctx *creq;
575 	u32 bmap_size = 0;
576 
577 	rcfw->pdev = res->pdev;
578 	cmdq = &rcfw->cmdq;
579 	creq = &rcfw->creq;
580 	rcfw->res = res;
581 
582 	sginfo.pgsize = PAGE_SIZE;
583 	sginfo.pgshft = PAGE_SHIFT;
584 
585 	hwq_attr.sginfo = &sginfo;
586 	hwq_attr.res = rcfw->res;
587 	hwq_attr.depth = BNXT_QPLIB_CREQE_MAX_CNT;
588 	hwq_attr.stride = BNXT_QPLIB_CREQE_UNITS;
589 	hwq_attr.type = bnxt_qplib_get_hwq_type(res);
590 
591 	if (bnxt_qplib_alloc_init_hwq(&creq->hwq, &hwq_attr)) {
592 		dev_err(&rcfw->pdev->dev,
593 			"HW channel CREQ allocation failed\n");
594 		goto fail;
595 	}
596 	if (ctx->hwrm_intf_ver < HWRM_VERSION_RCFW_CMDQ_DEPTH_CHECK)
597 		rcfw->cmdq_depth = BNXT_QPLIB_CMDQE_MAX_CNT_256;
598 	else
599 		rcfw->cmdq_depth = BNXT_QPLIB_CMDQE_MAX_CNT_8192;
600 
601 	sginfo.pgsize = bnxt_qplib_cmdqe_page_size(rcfw->cmdq_depth);
602 	hwq_attr.depth = rcfw->cmdq_depth;
603 	hwq_attr.stride = BNXT_QPLIB_CMDQE_UNITS;
604 	hwq_attr.type = HWQ_TYPE_CTX;
605 	if (bnxt_qplib_alloc_init_hwq(&cmdq->hwq, &hwq_attr)) {
606 		dev_err(&rcfw->pdev->dev,
607 			"HW channel CMDQ allocation failed\n");
608 		goto fail;
609 	}
610 
611 	rcfw->crsqe_tbl = kcalloc(cmdq->hwq.max_elements,
612 				  sizeof(*rcfw->crsqe_tbl), GFP_KERNEL);
613 	if (!rcfw->crsqe_tbl)
614 		goto fail;
615 
616 	bmap_size = BITS_TO_LONGS(rcfw->cmdq_depth) * sizeof(unsigned long);
617 	cmdq->cmdq_bitmap = kzalloc(bmap_size, GFP_KERNEL);
618 	if (!cmdq->cmdq_bitmap)
619 		goto fail;
620 
621 	cmdq->bmap_size = bmap_size;
622 
623 	/* Allocate one extra to hold the QP1 entries */
624 	rcfw->qp_tbl_size = qp_tbl_sz + 1;
625 	rcfw->qp_tbl = kcalloc(rcfw->qp_tbl_size, sizeof(struct bnxt_qplib_qp_node),
626 			       GFP_KERNEL);
627 	if (!rcfw->qp_tbl)
628 		goto fail;
629 
630 	return 0;
631 
632 fail:
633 	bnxt_qplib_free_rcfw_channel(rcfw);
634 	return -ENOMEM;
635 }
636 
637 void bnxt_qplib_rcfw_stop_irq(struct bnxt_qplib_rcfw *rcfw, bool kill)
638 {
639 	struct bnxt_qplib_creq_ctx *creq;
640 
641 	creq = &rcfw->creq;
642 	tasklet_disable(&creq->creq_tasklet);
643 	/* Mask h/w interrupts */
644 	bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, rcfw->res->cctx, false);
645 	/* Sync with last running IRQ-handler */
646 	synchronize_irq(creq->msix_vec);
647 	if (kill)
648 		tasklet_kill(&creq->creq_tasklet);
649 
650 	if (creq->requested) {
651 		free_irq(creq->msix_vec, rcfw);
652 		creq->requested = false;
653 	}
654 }
655 
656 void bnxt_qplib_disable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw)
657 {
658 	struct bnxt_qplib_creq_ctx *creq;
659 	struct bnxt_qplib_cmdq_ctx *cmdq;
660 	unsigned long indx;
661 
662 	creq = &rcfw->creq;
663 	cmdq = &rcfw->cmdq;
664 	/* Make sure the HW channel is stopped! */
665 	bnxt_qplib_rcfw_stop_irq(rcfw, true);
666 
667 	iounmap(cmdq->cmdq_mbox.reg.bar_reg);
668 	iounmap(creq->creq_db.reg.bar_reg);
669 
670 	indx = find_first_bit(cmdq->cmdq_bitmap, cmdq->bmap_size);
671 	if (indx != cmdq->bmap_size)
672 		dev_err(&rcfw->pdev->dev,
673 			"disabling RCFW with pending cmd-bit %lx\n", indx);
674 
675 	cmdq->cmdq_mbox.reg.bar_reg = NULL;
676 	creq->creq_db.reg.bar_reg = NULL;
677 	creq->aeq_handler = NULL;
678 	creq->msix_vec = 0;
679 }
680 
681 int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector,
682 			      bool need_init)
683 {
684 	struct bnxt_qplib_creq_ctx *creq;
685 	int rc;
686 
687 	creq = &rcfw->creq;
688 
689 	if (creq->requested)
690 		return -EFAULT;
691 
692 	creq->msix_vec = msix_vector;
693 	if (need_init)
694 		tasklet_setup(&creq->creq_tasklet, bnxt_qplib_service_creq);
695 	else
696 		tasklet_enable(&creq->creq_tasklet);
697 	rc = request_irq(creq->msix_vec, bnxt_qplib_creq_irq, 0,
698 			 "bnxt_qplib_creq", rcfw);
699 	if (rc)
700 		return rc;
701 	creq->requested = true;
702 
703 	bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, rcfw->res->cctx, true);
704 
705 	return 0;
706 }
707 
708 static int bnxt_qplib_map_cmdq_mbox(struct bnxt_qplib_rcfw *rcfw, bool is_vf)
709 {
710 	struct bnxt_qplib_cmdq_mbox *mbox;
711 	resource_size_t bar_reg;
712 	struct pci_dev *pdev;
713 	u16 prod_offt;
714 	int rc = 0;
715 
716 	pdev = rcfw->pdev;
717 	mbox = &rcfw->cmdq.cmdq_mbox;
718 
719 	mbox->reg.bar_id = RCFW_COMM_PCI_BAR_REGION;
720 	mbox->reg.len = RCFW_COMM_SIZE;
721 	mbox->reg.bar_base = pci_resource_start(pdev, mbox->reg.bar_id);
722 	if (!mbox->reg.bar_base) {
723 		dev_err(&pdev->dev,
724 			"QPLIB: CMDQ BAR region %d resc start is 0!\n",
725 			mbox->reg.bar_id);
726 		return -ENOMEM;
727 	}
728 
729 	bar_reg = mbox->reg.bar_base + RCFW_COMM_BASE_OFFSET;
730 	mbox->reg.len = RCFW_COMM_SIZE;
731 	mbox->reg.bar_reg = ioremap(bar_reg, mbox->reg.len);
732 	if (!mbox->reg.bar_reg) {
733 		dev_err(&pdev->dev,
734 			"QPLIB: CMDQ BAR region %d mapping failed\n",
735 			mbox->reg.bar_id);
736 		return -ENOMEM;
737 	}
738 
739 	prod_offt = is_vf ? RCFW_VF_COMM_PROD_OFFSET :
740 			    RCFW_PF_COMM_PROD_OFFSET;
741 	mbox->prod = (void  __iomem *)(mbox->reg.bar_reg + prod_offt);
742 	mbox->db = (void __iomem *)(mbox->reg.bar_reg + RCFW_COMM_TRIG_OFFSET);
743 	return rc;
744 }
745 
746 static int bnxt_qplib_map_creq_db(struct bnxt_qplib_rcfw *rcfw, u32 reg_offt)
747 {
748 	struct bnxt_qplib_creq_db *creq_db;
749 	resource_size_t bar_reg;
750 	struct pci_dev *pdev;
751 
752 	pdev = rcfw->pdev;
753 	creq_db = &rcfw->creq.creq_db;
754 
755 	creq_db->reg.bar_id = RCFW_COMM_CONS_PCI_BAR_REGION;
756 	creq_db->reg.bar_base = pci_resource_start(pdev, creq_db->reg.bar_id);
757 	if (!creq_db->reg.bar_id)
758 		dev_err(&pdev->dev,
759 			"QPLIB: CREQ BAR region %d resc start is 0!",
760 			creq_db->reg.bar_id);
761 
762 	bar_reg = creq_db->reg.bar_base + reg_offt;
763 	/* Unconditionally map 8 bytes to support 57500 series */
764 	creq_db->reg.len = 8;
765 	creq_db->reg.bar_reg = ioremap(bar_reg, creq_db->reg.len);
766 	if (!creq_db->reg.bar_reg) {
767 		dev_err(&pdev->dev,
768 			"QPLIB: CREQ BAR region %d mapping failed",
769 			creq_db->reg.bar_id);
770 		return -ENOMEM;
771 	}
772 	creq_db->dbinfo.db = creq_db->reg.bar_reg;
773 	creq_db->dbinfo.hwq = &rcfw->creq.hwq;
774 	creq_db->dbinfo.xid = rcfw->creq.ring_id;
775 	return 0;
776 }
777 
778 static void bnxt_qplib_start_rcfw(struct bnxt_qplib_rcfw *rcfw)
779 {
780 	struct bnxt_qplib_cmdq_ctx *cmdq;
781 	struct bnxt_qplib_creq_ctx *creq;
782 	struct bnxt_qplib_cmdq_mbox *mbox;
783 	struct cmdq_init init = {0};
784 
785 	cmdq = &rcfw->cmdq;
786 	creq = &rcfw->creq;
787 	mbox = &cmdq->cmdq_mbox;
788 
789 	init.cmdq_pbl = cpu_to_le64(cmdq->hwq.pbl[PBL_LVL_0].pg_map_arr[0]);
790 	init.cmdq_size_cmdq_lvl =
791 			cpu_to_le16(((rcfw->cmdq_depth <<
792 				      CMDQ_INIT_CMDQ_SIZE_SFT) &
793 				    CMDQ_INIT_CMDQ_SIZE_MASK) |
794 				    ((cmdq->hwq.level <<
795 				      CMDQ_INIT_CMDQ_LVL_SFT) &
796 				    CMDQ_INIT_CMDQ_LVL_MASK));
797 	init.creq_ring_id = cpu_to_le16(creq->ring_id);
798 	/* Write to the Bono mailbox register */
799 	__iowrite32_copy(mbox->reg.bar_reg, &init, sizeof(init) / 4);
800 }
801 
802 int bnxt_qplib_enable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw,
803 				   int msix_vector,
804 				   int cp_bar_reg_off, int virt_fn,
805 				   aeq_handler_t aeq_handler)
806 {
807 	struct bnxt_qplib_cmdq_ctx *cmdq;
808 	struct bnxt_qplib_creq_ctx *creq;
809 	int rc;
810 
811 	cmdq = &rcfw->cmdq;
812 	creq = &rcfw->creq;
813 
814 	/* Clear to defaults */
815 
816 	cmdq->seq_num = 0;
817 	set_bit(FIRMWARE_FIRST_FLAG, &cmdq->flags);
818 	init_waitqueue_head(&cmdq->waitq);
819 
820 	creq->stats.creq_qp_event_processed = 0;
821 	creq->stats.creq_func_event_processed = 0;
822 	creq->aeq_handler = aeq_handler;
823 
824 	rc = bnxt_qplib_map_cmdq_mbox(rcfw, virt_fn);
825 	if (rc)
826 		return rc;
827 
828 	rc = bnxt_qplib_map_creq_db(rcfw, cp_bar_reg_off);
829 	if (rc)
830 		return rc;
831 
832 	rc = bnxt_qplib_rcfw_start_irq(rcfw, msix_vector, true);
833 	if (rc) {
834 		dev_err(&rcfw->pdev->dev,
835 			"Failed to request IRQ for CREQ rc = 0x%x\n", rc);
836 		bnxt_qplib_disable_rcfw_channel(rcfw);
837 		return rc;
838 	}
839 
840 	bnxt_qplib_start_rcfw(rcfw);
841 
842 	return 0;
843 }
844 
845 struct bnxt_qplib_rcfw_sbuf *bnxt_qplib_rcfw_alloc_sbuf(
846 		struct bnxt_qplib_rcfw *rcfw,
847 		u32 size)
848 {
849 	struct bnxt_qplib_rcfw_sbuf *sbuf;
850 
851 	sbuf = kzalloc(sizeof(*sbuf), GFP_ATOMIC);
852 	if (!sbuf)
853 		return NULL;
854 
855 	sbuf->size = size;
856 	sbuf->sb = dma_alloc_coherent(&rcfw->pdev->dev, sbuf->size,
857 				      &sbuf->dma_addr, GFP_ATOMIC);
858 	if (!sbuf->sb)
859 		goto bail;
860 
861 	return sbuf;
862 bail:
863 	kfree(sbuf);
864 	return NULL;
865 }
866 
867 void bnxt_qplib_rcfw_free_sbuf(struct bnxt_qplib_rcfw *rcfw,
868 			       struct bnxt_qplib_rcfw_sbuf *sbuf)
869 {
870 	if (sbuf->sb)
871 		dma_free_coherent(&rcfw->pdev->dev, sbuf->size,
872 				  sbuf->sb, sbuf->dma_addr);
873 	kfree(sbuf);
874 }
875