bnxt_coredump.c

  1/* Broadcom NetXtreme-C/E network driver.
  2 *
  3 * Copyright (c) 2021 Broadcom Limited
  4 *
  5 * This program is free software; you can redistribute it and/or modify
  6 * it under the terms of the GNU General Public License as published by
  7 * the Free Software Foundation.
  8 */
  9
 10#include <linux/types.h>
 11#include <linux/errno.h>
 12#include <linux/pci.h>
 13#include <linux/bnxt/hsi.h>
 14#include "bnxt.h"
 15#include "bnxt_hwrm.h"
 16#include "bnxt_coredump.h"
 17
 18static const u16 bnxt_bstore_to_seg_id[] = {
 19	[BNXT_CTX_QP]			= BNXT_CTX_MEM_SEG_QP,
 20	[BNXT_CTX_SRQ]			= BNXT_CTX_MEM_SEG_SRQ,
 21	[BNXT_CTX_CQ]			= BNXT_CTX_MEM_SEG_CQ,
 22	[BNXT_CTX_VNIC]			= BNXT_CTX_MEM_SEG_VNIC,
 23	[BNXT_CTX_STAT]			= BNXT_CTX_MEM_SEG_STAT,
 24	[BNXT_CTX_STQM]			= BNXT_CTX_MEM_SEG_STQM,
 25	[BNXT_CTX_FTQM]			= BNXT_CTX_MEM_SEG_FTQM,
 26	[BNXT_CTX_MRAV]			= BNXT_CTX_MEM_SEG_MRAV,
 27	[BNXT_CTX_TIM]			= BNXT_CTX_MEM_SEG_TIM,
 28	[BNXT_CTX_SRT]			= BNXT_CTX_MEM_SEG_SRT,
 29	[BNXT_CTX_SRT2]			= BNXT_CTX_MEM_SEG_SRT2,
 30	[BNXT_CTX_CRT]			= BNXT_CTX_MEM_SEG_CRT,
 31	[BNXT_CTX_CRT2]			= BNXT_CTX_MEM_SEG_CRT2,
 32	[BNXT_CTX_RIGP0]		= BNXT_CTX_MEM_SEG_RIGP0,
 33	[BNXT_CTX_L2HWRM]		= BNXT_CTX_MEM_SEG_L2HWRM,
 34	[BNXT_CTX_REHWRM]		= BNXT_CTX_MEM_SEG_REHWRM,
 35	[BNXT_CTX_CA0]			= BNXT_CTX_MEM_SEG_CA0,
 36	[BNXT_CTX_CA1]			= BNXT_CTX_MEM_SEG_CA1,
 37	[BNXT_CTX_CA2]			= BNXT_CTX_MEM_SEG_CA2,
 38	[BNXT_CTX_RIGP1]		= BNXT_CTX_MEM_SEG_RIGP1,
 39	[BNXT_CTX_KONG]			= BNXT_CTX_MEM_SEG_KONG,
 40	[BNXT_CTX_QPC]			= BNXT_CTX_MEM_SEG_QPC,
 41};
 42
 43static int bnxt_dbg_hwrm_log_buffer_flush(struct bnxt *bp, u16 type, u32 flags,
 44					  u32 *offset)
 45{
 46	struct hwrm_dbg_log_buffer_flush_output *resp;
 47	struct hwrm_dbg_log_buffer_flush_input *req;
 48	int rc;
 49
 50	rc = hwrm_req_init(bp, req, HWRM_DBG_LOG_BUFFER_FLUSH);
 51	if (rc)
 52		return rc;
 53
 54	req->flags = cpu_to_le32(flags);
 55	req->type = cpu_to_le16(type);
 56	resp = hwrm_req_hold(bp, req);
 57	rc = hwrm_req_send(bp, req);
 58	if (!rc)
 59		*offset = le32_to_cpu(resp->current_buffer_offset);
 60	hwrm_req_drop(bp, req);
 61	return rc;
 62}
 63
 64static int bnxt_hwrm_dbg_dma_data(struct bnxt *bp, void *msg,
 65				  struct bnxt_hwrm_dbg_dma_info *info)
 66{
 67	struct hwrm_dbg_cmn_input *cmn_req = msg;
 68	__le16 *seq_ptr = msg + info->seq_off;
 69	struct hwrm_dbg_cmn_output *cmn_resp;
 70	u16 seq = 0, len, segs_off;
 71	dma_addr_t dma_handle;
 72	void *dma_buf, *resp;
 73	int rc, off = 0;
 74
 75	dma_buf = hwrm_req_dma_slice(bp, msg, info->dma_len, &dma_handle);
 76	if (!dma_buf) {
 77		hwrm_req_drop(bp, msg);
 78		return -ENOMEM;
 79	}
 80
 81	hwrm_req_timeout(bp, msg, bp->hwrm_cmd_max_timeout);
 82	cmn_resp = hwrm_req_hold(bp, msg);
 83	resp = cmn_resp;
 84
 85	segs_off = offsetof(struct hwrm_dbg_coredump_list_output,
 86			    total_segments);
 87	cmn_req->host_dest_addr = cpu_to_le64(dma_handle);
 88	cmn_req->host_buf_len = cpu_to_le32(info->dma_len);
 89	while (1) {
 90		*seq_ptr = cpu_to_le16(seq);
 91		rc = hwrm_req_send(bp, msg);
 92		if (rc)
 93			break;
 94
 95		len = le16_to_cpu(*((__le16 *)(resp + info->data_len_off)));
 96		if (!seq &&
 97		    cmn_req->req_type == cpu_to_le16(HWRM_DBG_COREDUMP_LIST)) {
 98			info->segs = le16_to_cpu(*((__le16 *)(resp +
 99							      segs_off)));
100			if (!info->segs) {
101				rc = -EIO;
102				break;
103			}
104
105			info->dest_buf_size = info->segs *
106					sizeof(struct coredump_segment_record);
107			info->dest_buf = kmalloc(info->dest_buf_size,
108						 GFP_KERNEL);
109			if (!info->dest_buf) {
110				rc = -ENOMEM;
111				break;
112			}
113		}
114
115		if (cmn_req->req_type ==
116				cpu_to_le16(HWRM_DBG_COREDUMP_RETRIEVE))
117			info->dest_buf_size += len;
118
119		if (info->dest_buf) {
120			if ((info->seg_start + off + len) <=
121			    BNXT_COREDUMP_BUF_LEN(info->buf_len)) {
122				u16 copylen = min_t(u16, len,
123						    info->dest_buf_size - off);
124
125				memcpy(info->dest_buf + off, dma_buf, copylen);
126				if (copylen < len)
127					break;
128			} else {
129				rc = -ENOBUFS;
130				if (cmn_req->req_type ==
131				    cpu_to_le16(HWRM_DBG_COREDUMP_LIST)) {
132					kfree(info->dest_buf);
133					info->dest_buf = NULL;
134				}
135				break;
136			}
137		}
138
139		if (!(cmn_resp->flags & HWRM_DBG_CMN_FLAGS_MORE))
140			break;
141
142		seq++;
143		off += len;
144	}
145	hwrm_req_drop(bp, msg);
146	return rc;
147}
148
149static int bnxt_hwrm_dbg_coredump_list(struct bnxt *bp,
150				       struct bnxt_coredump *coredump)
151{
152	struct bnxt_hwrm_dbg_dma_info info = {NULL};
153	struct hwrm_dbg_coredump_list_input *req;
154	int rc;
155
156	rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_LIST);
157	if (rc)
158		return rc;
159
160	info.dma_len = COREDUMP_LIST_BUF_LEN;
161	info.seq_off = offsetof(struct hwrm_dbg_coredump_list_input, seq_no);
162	info.data_len_off = offsetof(struct hwrm_dbg_coredump_list_output,
163				     data_len);
164
165	rc = bnxt_hwrm_dbg_dma_data(bp, req, &info);
166	if (!rc) {
167		coredump->data = info.dest_buf;
168		coredump->data_size = info.dest_buf_size;
169		coredump->total_segs = info.segs;
170	}
171	return rc;
172}
173
174static int bnxt_hwrm_dbg_coredump_initiate(struct bnxt *bp, u16 dump_type,
175					   u16 component_id, u16 segment_id)
176{
177	struct hwrm_dbg_coredump_initiate_input *req;
178	int rc;
179
180	rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_INITIATE);
181	if (rc)
182		return rc;
183
184	hwrm_req_timeout(bp, req, bp->hwrm_cmd_max_timeout);
185	req->component_id = cpu_to_le16(component_id);
186	req->segment_id = cpu_to_le16(segment_id);
187	if (dump_type == BNXT_DUMP_LIVE_WITH_CTX_L1_CACHE)
188		req->seg_flags = DBG_COREDUMP_INITIATE_REQ_SEG_FLAGS_COLLECT_CTX_L1_CACHE;
189
190	return hwrm_req_send(bp, req);
191}
192
193static int bnxt_hwrm_dbg_coredump_retrieve(struct bnxt *bp, u16 component_id,
194					   u16 segment_id, u32 *seg_len,
195					   void *buf, u32 buf_len, u32 offset)
196{
197	struct hwrm_dbg_coredump_retrieve_input *req;
198	struct bnxt_hwrm_dbg_dma_info info = {NULL};
199	int rc;
200
201	rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_RETRIEVE);
202	if (rc)
203		return rc;
204
205	req->component_id = cpu_to_le16(component_id);
206	req->segment_id = cpu_to_le16(segment_id);
207
208	info.dma_len = COREDUMP_RETRIEVE_BUF_LEN;
209	info.seq_off = offsetof(struct hwrm_dbg_coredump_retrieve_input,
210				seq_no);
211	info.data_len_off = offsetof(struct hwrm_dbg_coredump_retrieve_output,
212				     data_len);
213	if (buf) {
214		info.dest_buf = buf + offset;
215		info.buf_len = buf_len;
216		info.seg_start = offset;
217	}
218
219	rc = bnxt_hwrm_dbg_dma_data(bp, req, &info);
220	if (!rc)
221		*seg_len = info.dest_buf_size;
222
223	return rc;
224}
225
226void
227bnxt_fill_coredump_seg_hdr(struct bnxt *bp,
228			   struct bnxt_coredump_segment_hdr *seg_hdr,
229			   struct coredump_segment_record *seg_rec, u32 seg_len,
230			   int status, u32 duration, u32 instance, u32 comp_id,
231			   u32 seg_id)
232{
233	memset(seg_hdr, 0, sizeof(*seg_hdr));
234	memcpy(seg_hdr->signature, "sEgM", 4);
235	if (seg_rec) {
236		seg_hdr->component_id = (__force __le32)seg_rec->component_id;
237		seg_hdr->segment_id = (__force __le32)seg_rec->segment_id;
238		seg_hdr->low_version = seg_rec->version_low;
239		seg_hdr->high_version = seg_rec->version_hi;
240		seg_hdr->flags = cpu_to_le32(seg_rec->compress_flags);
241	} else {
242		seg_hdr->component_id = cpu_to_le32(comp_id);
243		seg_hdr->segment_id = cpu_to_le32(seg_id);
244	}
245	seg_hdr->function_id = cpu_to_le16(bp->pdev->devfn);
246	seg_hdr->length = cpu_to_le32(seg_len);
247	seg_hdr->status = cpu_to_le32(status);
248	seg_hdr->duration = cpu_to_le32(duration);
249	seg_hdr->data_offset = cpu_to_le32(sizeof(*seg_hdr));
250	seg_hdr->instance = cpu_to_le32(instance);
251}
252
253static void bnxt_fill_cmdline(struct bnxt_coredump_record *record)
254{
255	struct mm_struct *mm = current->mm;
256	int i, len, last = 0;
257
258	if (mm) {
259		len = min_t(int, mm->arg_end - mm->arg_start,
260			    sizeof(record->commandline) - 1);
261		if (len && !copy_from_user(record->commandline,
262					   (char __user *)mm->arg_start, len)) {
263			for (i = 0; i < len; i++) {
264				if (record->commandline[i])
265					last = i;
266				else
267					record->commandline[i] = ' ';
268			}
269			record->commandline[last + 1] = 0;
270			return;
271		}
272	}
273
274	strscpy(record->commandline, current->comm, TASK_COMM_LEN);
275}
276
277static void
278bnxt_fill_coredump_record(struct bnxt *bp, struct bnxt_coredump_record *record,
279			  time64_t start, s16 start_utc, u16 total_segs,
280			  int status)
281{
282	time64_t end = ktime_get_real_seconds();
283	u32 os_ver_major = 0, os_ver_minor = 0;
284	struct tm tm;
285
286	time64_to_tm(start, 0, &tm);
287	memset(record, 0, sizeof(*record));
288	memcpy(record->signature, "cOrE", 4);
289	record->flags = 0;
290	record->low_version = 0;
291	record->high_version = 1;
292	record->asic_state = 0;
293	strscpy(record->system_name, utsname()->nodename,
294		sizeof(record->system_name));
295	record->year = cpu_to_le16(tm.tm_year + 1900);
296	record->month = cpu_to_le16(tm.tm_mon + 1);
297	record->day = cpu_to_le16(tm.tm_mday);
298	record->hour = cpu_to_le16(tm.tm_hour);
299	record->minute = cpu_to_le16(tm.tm_min);
300	record->second = cpu_to_le16(tm.tm_sec);
301	record->utc_bias = cpu_to_le16(start_utc);
302	bnxt_fill_cmdline(record);
303	record->total_segments = cpu_to_le32(total_segs);
304
305	if (sscanf(utsname()->release, "%u.%u", &os_ver_major, &os_ver_minor) != 2)
306		netdev_warn(bp->dev, "Unknown OS release in coredump\n");
307	record->os_ver_major = cpu_to_le32(os_ver_major);
308	record->os_ver_minor = cpu_to_le32(os_ver_minor);
309
310	strscpy(record->os_name, utsname()->sysname, sizeof(record->os_name));
311	time64_to_tm(end, 0, &tm);
312	record->end_year = cpu_to_le16(tm.tm_year + 1900);
313	record->end_month = cpu_to_le16(tm.tm_mon + 1);
314	record->end_day = cpu_to_le16(tm.tm_mday);
315	record->end_hour = cpu_to_le16(tm.tm_hour);
316	record->end_minute = cpu_to_le16(tm.tm_min);
317	record->end_second = cpu_to_le16(tm.tm_sec);
318	record->end_utc_bias = cpu_to_le16(sys_tz.tz_minuteswest * 60);
319	record->asic_id1 = cpu_to_le32(bp->chip_num << 16 |
320				       bp->ver_resp.chip_rev << 8 |
321				       bp->ver_resp.chip_metal);
322	record->asic_id2 = 0;
323	record->coredump_status = cpu_to_le32(status);
324	record->ioctl_low_version = 0;
325	record->ioctl_high_version = 0;
326}
327
328static void bnxt_fill_drv_seg_record(struct bnxt *bp,
329				     struct bnxt_driver_segment_record *record,
330				     struct bnxt_ctx_mem_type *ctxm, u16 type)
331{
332	struct bnxt_bs_trace_info *bs_trace = &bp->bs_trace[type];
333	u32 offset = 0;
334	int rc = 0;
335
336	record->max_entries = cpu_to_le32(ctxm->max_entries);
337	record->entry_size = cpu_to_le32(ctxm->entry_size);
338
339	rc = bnxt_dbg_hwrm_log_buffer_flush(bp, type, 0, &offset);
340	if (rc)
341		return;
342
343	bnxt_bs_trace_check_wrap(bs_trace, offset);
344	record->offset = cpu_to_le32(bs_trace->last_offset);
345	record->wrapped = bs_trace->wrapped;
346}
347
348static u32 bnxt_get_ctx_coredump(struct bnxt *bp, void *buf, u32 offset,
349				 u32 *segs)
350{
351	struct bnxt_driver_segment_record record = {};
352	struct bnxt_coredump_segment_hdr seg_hdr;
353	struct bnxt_ctx_mem_info *ctx = bp->ctx;
354	u32 comp_id = BNXT_DRV_COMP_ID;
355	void *data = NULL;
356	size_t len = 0;
357	u16 type;
358
359	*segs = 0;
360	if (!ctx)
361		return 0;
362
363	if (buf)
364		buf += offset;
365	for (type = 0; type < BNXT_CTX_V2_MAX; type++) {
366		struct bnxt_ctx_mem_type *ctxm = &ctx->ctx_arr[type];
367		bool trace = bnxt_bs_trace_avail(bp, type);
368		u32 seg_id = bnxt_bstore_to_seg_id[type];
369		size_t seg_len, extra_hlen = 0;
370
371		if (!ctxm->mem_valid || !seg_id)
372			continue;
373
374		if (trace) {
375			extra_hlen = BNXT_SEG_RCD_LEN;
376			if (buf) {
377				u16 trace_type = bnxt_bstore_to_trace[type];
378
379				bnxt_fill_drv_seg_record(bp, &record, ctxm,
380							 trace_type);
381			}
382		}
383
384		if (buf)
385			data = buf + BNXT_SEG_HDR_LEN + extra_hlen;
386
387		seg_len = bnxt_copy_ctx_mem(bp, ctxm, data, 0) + extra_hlen;
388		if (buf) {
389			bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, NULL, seg_len,
390						   0, 0, 0, comp_id, seg_id);
391			memcpy(buf, &seg_hdr, BNXT_SEG_HDR_LEN);
392			buf += BNXT_SEG_HDR_LEN;
393			if (trace)
394				memcpy(buf, &record, BNXT_SEG_RCD_LEN);
395			buf += seg_len;
396		}
397		len += BNXT_SEG_HDR_LEN + seg_len;
398		*segs += 1;
399	}
400	return len;
401}
402
403static int __bnxt_get_coredump(struct bnxt *bp, u16 dump_type, void *buf,
404			       u32 *dump_len)
405{
406	u32 ver_get_resp_len = sizeof(struct hwrm_ver_get_output);
407	u32 offset = 0, seg_hdr_len, seg_record_len, buf_len = 0;
408	struct coredump_segment_record *seg_record = NULL;
409	struct bnxt_coredump_segment_hdr seg_hdr;
410	struct bnxt_coredump coredump = {NULL};
411	time64_t start_time;
412	u16 start_utc;
413	int rc = 0, i;
414
415	if (buf)
416		buf_len = *dump_len;
417
418	start_time = ktime_get_real_seconds();
419	start_utc = sys_tz.tz_minuteswest * 60;
420	seg_hdr_len = sizeof(seg_hdr);
421
422	/* First segment should be hwrm_ver_get response.
423	 * For hwrm_ver_get response Component id = 2 and Segment id = 0.
424	 */
425	*dump_len = seg_hdr_len + ver_get_resp_len;
426	if (buf) {
427		bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, NULL, ver_get_resp_len,
428					   0, 0, 0, BNXT_VER_GET_COMP_ID, 0);
429		memcpy(buf + offset, &seg_hdr, seg_hdr_len);
430		offset += seg_hdr_len;
431		memcpy(buf + offset, &bp->ver_resp, ver_get_resp_len);
432		offset += ver_get_resp_len;
433	}
434
435	if (dump_type == BNXT_DUMP_DRIVER) {
436		u32 drv_len, segs = 0;
437
438		drv_len = bnxt_get_ctx_coredump(bp, buf, offset, &segs);
439		*dump_len += drv_len;
440		offset += drv_len;
441		if (buf)
442			coredump.total_segs += segs;
443		goto err;
444	}
445
446	seg_record_len = sizeof(*seg_record);
447	rc = bnxt_hwrm_dbg_coredump_list(bp, &coredump);
448	if (rc) {
449		netdev_err(bp->dev, "Failed to get coredump segment list\n");
450		goto err;
451	}
452
453	*dump_len += seg_hdr_len * coredump.total_segs;
454
455	seg_record = (struct coredump_segment_record *)coredump.data;
456	seg_record_len = sizeof(*seg_record);
457
458	for (i = 0; i < coredump.total_segs; i++) {
459		u16 comp_id = le16_to_cpu(seg_record->component_id);
460		u16 seg_id = le16_to_cpu(seg_record->segment_id);
461		u32 duration = 0, seg_len = 0;
462		unsigned long start, end;
463
464		if (buf && ((offset + seg_hdr_len) >
465			    BNXT_COREDUMP_BUF_LEN(buf_len))) {
466			rc = -ENOBUFS;
467			goto err;
468		}
469
470		start = jiffies;
471
472		rc = bnxt_hwrm_dbg_coredump_initiate(bp, dump_type, comp_id,
473						     seg_id);
474		if (rc) {
475			netdev_err(bp->dev,
476				   "Failed to initiate coredump for seg = %d\n",
477				   seg_record->segment_id);
478			goto next_seg;
479		}
480
481		/* Write segment data into the buffer */
482		rc = bnxt_hwrm_dbg_coredump_retrieve(bp, comp_id, seg_id,
483						     &seg_len, buf, buf_len,
484						     offset + seg_hdr_len);
485		if (rc && rc == -ENOBUFS)
486			goto err;
487		else if (rc)
488			netdev_err(bp->dev,
489				   "Failed to retrieve coredump for seg = %d\n",
490				   seg_record->segment_id);
491
492next_seg:
493		end = jiffies;
494		duration = jiffies_to_msecs(end - start);
495		bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, seg_record, seg_len,
496					   rc, duration, 0, 0, 0);
497
498		if (buf) {
499			/* Write segment header into the buffer */
500			memcpy(buf + offset, &seg_hdr, seg_hdr_len);
501			offset += seg_hdr_len + seg_len;
502		}
503
504		*dump_len += seg_len;
505		seg_record =
506			(struct coredump_segment_record *)((u8 *)seg_record +
507							   seg_record_len);
508	}
509
510err:
511	if (buf)
512		bnxt_fill_coredump_record(bp, buf + offset, start_time,
513					  start_utc, coredump.total_segs + 1,
514					  rc);
515	kfree(coredump.data);
516	if (!rc) {
517		*dump_len += sizeof(struct bnxt_coredump_record);
518		/* The actual coredump length can be smaller than the FW
519		 * reported length earlier.  Use the ethtool provided length.
520		 */
521		if (buf_len)
522			*dump_len = buf_len;
523	} else if (rc == -ENOBUFS) {
524		netdev_err(bp->dev, "Firmware returned large coredump buffer\n");
525	}
526	return rc;
527}
528
529static u32 bnxt_copy_crash_data(struct bnxt_ring_mem_info *rmem, void *buf,
530				u32 dump_len)
531{
532	u32 data_copied = 0;
533	u32 data_len;
534	int i;
535
536	for (i = 0; i < rmem->nr_pages; i++) {
537		data_len = rmem->page_size;
538		if (data_copied + data_len > dump_len)
539			data_len = dump_len - data_copied;
540		memcpy(buf + data_copied, rmem->pg_arr[i], data_len);
541		data_copied += data_len;
542		if (data_copied >= dump_len)
543			break;
544	}
545	return data_copied;
546}
547
548static int bnxt_copy_crash_dump(struct bnxt *bp, void *buf, u32 dump_len)
549{
550	struct bnxt_ring_mem_info *rmem;
551	u32 offset = 0;
552
553	if (!bp->fw_crash_mem)
554		return -ENOENT;
555
556	rmem = &bp->fw_crash_mem->ring_mem;
557
558	if (rmem->depth > 1) {
559		int i;
560
561		for (i = 0; i < rmem->nr_pages; i++) {
562			struct bnxt_ctx_pg_info *pg_tbl;
563
564			pg_tbl = bp->fw_crash_mem->ctx_pg_tbl[i];
565			offset += bnxt_copy_crash_data(&pg_tbl->ring_mem,
566						       buf + offset,
567						       dump_len - offset);
568			if (offset >= dump_len)
569				break;
570		}
571	} else {
572		bnxt_copy_crash_data(rmem, buf, dump_len);
573	}
574
575	return 0;
576}
577
578static bool bnxt_crash_dump_avail(struct bnxt *bp)
579{
580	u32 sig = 0;
581
582	/* First 4 bytes(signature) of crash dump is always non-zero */
583	bnxt_copy_crash_dump(bp, &sig, sizeof(sig));
584	return !!sig;
585}
586
587int bnxt_get_coredump(struct bnxt *bp, u16 dump_type, void *buf, u32 *dump_len)
588{
589	if (dump_type == BNXT_DUMP_CRASH) {
590		if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_HOST_DDR)
591			return bnxt_copy_crash_dump(bp, buf, *dump_len);
592#ifdef CONFIG_TEE_BNXT_FW
593		else if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR)
594			return tee_bnxt_copy_coredump(buf, 0, *dump_len);
595#endif
596		else
597			return -EOPNOTSUPP;
598	} else {
599		return __bnxt_get_coredump(bp, dump_type, buf, dump_len);
600	}
601}
602
603int bnxt_hwrm_get_dump_len(struct bnxt *bp, u16 dump_type, u32 *dump_len)
604{
605	struct hwrm_dbg_qcfg_output *resp;
606	struct hwrm_dbg_qcfg_input *req;
607	int rc, hdr_len = 0;
608
609	if (!(bp->fw_cap & BNXT_FW_CAP_DBG_QCAPS))
610		return -EOPNOTSUPP;
611
612	if (dump_type == BNXT_DUMP_CRASH &&
613	    !(bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR ||
614	     (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_HOST_DDR)))
615		return -EOPNOTSUPP;
616
617	rc = hwrm_req_init(bp, req, HWRM_DBG_QCFG);
618	if (rc)
619		return rc;
620
621	req->fid = cpu_to_le16(0xffff);
622	if (dump_type == BNXT_DUMP_CRASH) {
623		if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR)
624			req->flags = cpu_to_le16(BNXT_DBG_FL_CR_DUMP_SIZE_SOC);
625		else
626			req->flags = cpu_to_le16(BNXT_DBG_FL_CR_DUMP_SIZE_HOST);
627	}
628
629	resp = hwrm_req_hold(bp, req);
630	rc = hwrm_req_send(bp, req);
631	if (rc)
632		goto get_dump_len_exit;
633
634	if (dump_type == BNXT_DUMP_CRASH) {
635		if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR)
636			*dump_len = BNXT_CRASH_DUMP_LEN;
637		else
638			*dump_len = le32_to_cpu(resp->crashdump_size);
639	} else {
640		/* Driver adds coredump header and "HWRM_VER_GET response"
641		 * segment additionally to coredump.
642		 */
643		hdr_len = sizeof(struct bnxt_coredump_segment_hdr) +
644		sizeof(struct hwrm_ver_get_output) +
645		sizeof(struct bnxt_coredump_record);
646		*dump_len = le32_to_cpu(resp->coredump_size) + hdr_len;
647	}
648	if (*dump_len <= hdr_len)
649		rc = -EINVAL;
650
651get_dump_len_exit:
652	hwrm_req_drop(bp, req);
653	return rc;
654}
655
656u32 bnxt_get_coredump_length(struct bnxt *bp, u16 dump_type)
657{
658	u32 len = 0;
659
660	if (dump_type == BNXT_DUMP_CRASH &&
661	    bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_HOST_DDR &&
662	    bp->fw_crash_mem) {
663		if (!bnxt_crash_dump_avail(bp))
664			return 0;
665
666		return bp->fw_crash_len;
667	}
668
669	if (dump_type != BNXT_DUMP_DRIVER) {
670		if (!bnxt_hwrm_get_dump_len(bp, dump_type, &len))
671			return len;
672	}
673	if (dump_type != BNXT_DUMP_CRASH)
674		__bnxt_get_coredump(bp, dump_type, NULL, &len);
675
676	return len;
677}