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 "bnxt_hsi.h"
14 #include "bnxt.h"
15 #include "bnxt_hwrm.h"
16 #include "bnxt_coredump.h"
17
bnxt_hwrm_dbg_dma_data(struct bnxt * bp,void * msg,struct bnxt_hwrm_dbg_dma_info * info)18 static int bnxt_hwrm_dbg_dma_data(struct bnxt *bp, void *msg,
19 struct bnxt_hwrm_dbg_dma_info *info)
20 {
21 struct hwrm_dbg_cmn_input *cmn_req = msg;
22 __le16 *seq_ptr = msg + info->seq_off;
23 struct hwrm_dbg_cmn_output *cmn_resp;
24 u16 seq = 0, len, segs_off;
25 dma_addr_t dma_handle;
26 void *dma_buf, *resp;
27 int rc, off = 0;
28
29 dma_buf = hwrm_req_dma_slice(bp, msg, info->dma_len, &dma_handle);
30 if (!dma_buf) {
31 hwrm_req_drop(bp, msg);
32 return -ENOMEM;
33 }
34
35 hwrm_req_timeout(bp, msg, bp->hwrm_cmd_max_timeout);
36 cmn_resp = hwrm_req_hold(bp, msg);
37 resp = cmn_resp;
38
39 segs_off = offsetof(struct hwrm_dbg_coredump_list_output,
40 total_segments);
41 cmn_req->host_dest_addr = cpu_to_le64(dma_handle);
42 cmn_req->host_buf_len = cpu_to_le32(info->dma_len);
43 while (1) {
44 *seq_ptr = cpu_to_le16(seq);
45 rc = hwrm_req_send(bp, msg);
46 if (rc)
47 break;
48
49 len = le16_to_cpu(*((__le16 *)(resp + info->data_len_off)));
50 if (!seq &&
51 cmn_req->req_type == cpu_to_le16(HWRM_DBG_COREDUMP_LIST)) {
52 info->segs = le16_to_cpu(*((__le16 *)(resp +
53 segs_off)));
54 if (!info->segs) {
55 rc = -EIO;
56 break;
57 }
58
59 info->dest_buf_size = info->segs *
60 sizeof(struct coredump_segment_record);
61 info->dest_buf = kmalloc(info->dest_buf_size,
62 GFP_KERNEL);
63 if (!info->dest_buf) {
64 rc = -ENOMEM;
65 break;
66 }
67 }
68
69 if (info->dest_buf) {
70 if ((info->seg_start + off + len) <=
71 BNXT_COREDUMP_BUF_LEN(info->buf_len)) {
72 memcpy(info->dest_buf + off, dma_buf, len);
73 } else {
74 rc = -ENOBUFS;
75 break;
76 }
77 }
78
79 if (cmn_req->req_type ==
80 cpu_to_le16(HWRM_DBG_COREDUMP_RETRIEVE))
81 info->dest_buf_size += len;
82
83 if (!(cmn_resp->flags & HWRM_DBG_CMN_FLAGS_MORE))
84 break;
85
86 seq++;
87 off += len;
88 }
89 hwrm_req_drop(bp, msg);
90 return rc;
91 }
92
bnxt_hwrm_dbg_coredump_list(struct bnxt * bp,struct bnxt_coredump * coredump)93 static int bnxt_hwrm_dbg_coredump_list(struct bnxt *bp,
94 struct bnxt_coredump *coredump)
95 {
96 struct bnxt_hwrm_dbg_dma_info info = {NULL};
97 struct hwrm_dbg_coredump_list_input *req;
98 int rc;
99
100 rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_LIST);
101 if (rc)
102 return rc;
103
104 info.dma_len = COREDUMP_LIST_BUF_LEN;
105 info.seq_off = offsetof(struct hwrm_dbg_coredump_list_input, seq_no);
106 info.data_len_off = offsetof(struct hwrm_dbg_coredump_list_output,
107 data_len);
108
109 rc = bnxt_hwrm_dbg_dma_data(bp, req, &info);
110 if (!rc) {
111 coredump->data = info.dest_buf;
112 coredump->data_size = info.dest_buf_size;
113 coredump->total_segs = info.segs;
114 }
115 return rc;
116 }
117
bnxt_hwrm_dbg_coredump_initiate(struct bnxt * bp,u16 component_id,u16 segment_id)118 static int bnxt_hwrm_dbg_coredump_initiate(struct bnxt *bp, u16 component_id,
119 u16 segment_id)
120 {
121 struct hwrm_dbg_coredump_initiate_input *req;
122 int rc;
123
124 rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_INITIATE);
125 if (rc)
126 return rc;
127
128 hwrm_req_timeout(bp, req, bp->hwrm_cmd_max_timeout);
129 req->component_id = cpu_to_le16(component_id);
130 req->segment_id = cpu_to_le16(segment_id);
131
132 return hwrm_req_send(bp, req);
133 }
134
bnxt_hwrm_dbg_coredump_retrieve(struct bnxt * bp,u16 component_id,u16 segment_id,u32 * seg_len,void * buf,u32 buf_len,u32 offset)135 static int bnxt_hwrm_dbg_coredump_retrieve(struct bnxt *bp, u16 component_id,
136 u16 segment_id, u32 *seg_len,
137 void *buf, u32 buf_len, u32 offset)
138 {
139 struct hwrm_dbg_coredump_retrieve_input *req;
140 struct bnxt_hwrm_dbg_dma_info info = {NULL};
141 int rc;
142
143 rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_RETRIEVE);
144 if (rc)
145 return rc;
146
147 req->component_id = cpu_to_le16(component_id);
148 req->segment_id = cpu_to_le16(segment_id);
149
150 info.dma_len = COREDUMP_RETRIEVE_BUF_LEN;
151 info.seq_off = offsetof(struct hwrm_dbg_coredump_retrieve_input,
152 seq_no);
153 info.data_len_off = offsetof(struct hwrm_dbg_coredump_retrieve_output,
154 data_len);
155 if (buf) {
156 info.dest_buf = buf + offset;
157 info.buf_len = buf_len;
158 info.seg_start = offset;
159 }
160
161 rc = bnxt_hwrm_dbg_dma_data(bp, req, &info);
162 if (!rc)
163 *seg_len = info.dest_buf_size;
164
165 return rc;
166 }
167
168 static void
bnxt_fill_coredump_seg_hdr(struct bnxt * bp,struct bnxt_coredump_segment_hdr * seg_hdr,struct coredump_segment_record * seg_rec,u32 seg_len,int status,u32 duration,u32 instance)169 bnxt_fill_coredump_seg_hdr(struct bnxt *bp,
170 struct bnxt_coredump_segment_hdr *seg_hdr,
171 struct coredump_segment_record *seg_rec, u32 seg_len,
172 int status, u32 duration, u32 instance)
173 {
174 memset(seg_hdr, 0, sizeof(*seg_hdr));
175 memcpy(seg_hdr->signature, "sEgM", 4);
176 if (seg_rec) {
177 seg_hdr->component_id = (__force __le32)seg_rec->component_id;
178 seg_hdr->segment_id = (__force __le32)seg_rec->segment_id;
179 seg_hdr->low_version = seg_rec->version_low;
180 seg_hdr->high_version = seg_rec->version_hi;
181 } else {
182 /* For hwrm_ver_get response Component id = 2
183 * and Segment id = 0
184 */
185 seg_hdr->component_id = cpu_to_le32(2);
186 seg_hdr->segment_id = 0;
187 }
188 seg_hdr->function_id = cpu_to_le16(bp->pdev->devfn);
189 seg_hdr->length = cpu_to_le32(seg_len);
190 seg_hdr->status = cpu_to_le32(status);
191 seg_hdr->duration = cpu_to_le32(duration);
192 seg_hdr->data_offset = cpu_to_le32(sizeof(*seg_hdr));
193 seg_hdr->instance = cpu_to_le32(instance);
194 }
195
196 static void
bnxt_fill_coredump_record(struct bnxt * bp,struct bnxt_coredump_record * record,time64_t start,s16 start_utc,u16 total_segs,int status)197 bnxt_fill_coredump_record(struct bnxt *bp, struct bnxt_coredump_record *record,
198 time64_t start, s16 start_utc, u16 total_segs,
199 int status)
200 {
201 time64_t end = ktime_get_real_seconds();
202 u32 os_ver_major = 0, os_ver_minor = 0;
203 struct tm tm;
204
205 time64_to_tm(start, 0, &tm);
206 memset(record, 0, sizeof(*record));
207 memcpy(record->signature, "cOrE", 4);
208 record->flags = 0;
209 record->low_version = 0;
210 record->high_version = 1;
211 record->asic_state = 0;
212 strscpy(record->system_name, utsname()->nodename,
213 sizeof(record->system_name));
214 record->year = cpu_to_le16(tm.tm_year + 1900);
215 record->month = cpu_to_le16(tm.tm_mon + 1);
216 record->day = cpu_to_le16(tm.tm_mday);
217 record->hour = cpu_to_le16(tm.tm_hour);
218 record->minute = cpu_to_le16(tm.tm_min);
219 record->second = cpu_to_le16(tm.tm_sec);
220 record->utc_bias = cpu_to_le16(start_utc);
221 strcpy(record->commandline, "ethtool -w");
222 record->total_segments = cpu_to_le32(total_segs);
223
224 if (sscanf(utsname()->release, "%u.%u", &os_ver_major, &os_ver_minor) != 2)
225 netdev_warn(bp->dev, "Unknown OS release in coredump\n");
226 record->os_ver_major = cpu_to_le32(os_ver_major);
227 record->os_ver_minor = cpu_to_le32(os_ver_minor);
228
229 strscpy(record->os_name, utsname()->sysname, sizeof(record->os_name));
230 time64_to_tm(end, 0, &tm);
231 record->end_year = cpu_to_le16(tm.tm_year + 1900);
232 record->end_month = cpu_to_le16(tm.tm_mon + 1);
233 record->end_day = cpu_to_le16(tm.tm_mday);
234 record->end_hour = cpu_to_le16(tm.tm_hour);
235 record->end_minute = cpu_to_le16(tm.tm_min);
236 record->end_second = cpu_to_le16(tm.tm_sec);
237 record->end_utc_bias = cpu_to_le16(sys_tz.tz_minuteswest * 60);
238 record->asic_id1 = cpu_to_le32(bp->chip_num << 16 |
239 bp->ver_resp.chip_rev << 8 |
240 bp->ver_resp.chip_metal);
241 record->asic_id2 = 0;
242 record->coredump_status = cpu_to_le32(status);
243 record->ioctl_low_version = 0;
244 record->ioctl_high_version = 0;
245 }
246
__bnxt_get_coredump(struct bnxt * bp,void * buf,u32 * dump_len)247 static int __bnxt_get_coredump(struct bnxt *bp, void *buf, u32 *dump_len)
248 {
249 u32 ver_get_resp_len = sizeof(struct hwrm_ver_get_output);
250 u32 offset = 0, seg_hdr_len, seg_record_len, buf_len = 0;
251 struct coredump_segment_record *seg_record = NULL;
252 struct bnxt_coredump_segment_hdr seg_hdr;
253 struct bnxt_coredump coredump = {NULL};
254 time64_t start_time;
255 u16 start_utc;
256 int rc = 0, i;
257
258 if (buf)
259 buf_len = *dump_len;
260
261 start_time = ktime_get_real_seconds();
262 start_utc = sys_tz.tz_minuteswest * 60;
263 seg_hdr_len = sizeof(seg_hdr);
264
265 /* First segment should be hwrm_ver_get response */
266 *dump_len = seg_hdr_len + ver_get_resp_len;
267 if (buf) {
268 bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, NULL, ver_get_resp_len,
269 0, 0, 0);
270 memcpy(buf + offset, &seg_hdr, seg_hdr_len);
271 offset += seg_hdr_len;
272 memcpy(buf + offset, &bp->ver_resp, ver_get_resp_len);
273 offset += ver_get_resp_len;
274 }
275
276 rc = bnxt_hwrm_dbg_coredump_list(bp, &coredump);
277 if (rc) {
278 netdev_err(bp->dev, "Failed to get coredump segment list\n");
279 goto err;
280 }
281
282 *dump_len += seg_hdr_len * coredump.total_segs;
283
284 seg_record = (struct coredump_segment_record *)coredump.data;
285 seg_record_len = sizeof(*seg_record);
286
287 for (i = 0; i < coredump.total_segs; i++) {
288 u16 comp_id = le16_to_cpu(seg_record->component_id);
289 u16 seg_id = le16_to_cpu(seg_record->segment_id);
290 u32 duration = 0, seg_len = 0;
291 unsigned long start, end;
292
293 if (buf && ((offset + seg_hdr_len) >
294 BNXT_COREDUMP_BUF_LEN(buf_len))) {
295 rc = -ENOBUFS;
296 goto err;
297 }
298
299 start = jiffies;
300
301 rc = bnxt_hwrm_dbg_coredump_initiate(bp, comp_id, seg_id);
302 if (rc) {
303 netdev_err(bp->dev,
304 "Failed to initiate coredump for seg = %d\n",
305 seg_record->segment_id);
306 goto next_seg;
307 }
308
309 /* Write segment data into the buffer */
310 rc = bnxt_hwrm_dbg_coredump_retrieve(bp, comp_id, seg_id,
311 &seg_len, buf, buf_len,
312 offset + seg_hdr_len);
313 if (rc && rc == -ENOBUFS)
314 goto err;
315 else if (rc)
316 netdev_err(bp->dev,
317 "Failed to retrieve coredump for seg = %d\n",
318 seg_record->segment_id);
319
320 next_seg:
321 end = jiffies;
322 duration = jiffies_to_msecs(end - start);
323 bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, seg_record, seg_len,
324 rc, duration, 0);
325
326 if (buf) {
327 /* Write segment header into the buffer */
328 memcpy(buf + offset, &seg_hdr, seg_hdr_len);
329 offset += seg_hdr_len + seg_len;
330 }
331
332 *dump_len += seg_len;
333 seg_record =
334 (struct coredump_segment_record *)((u8 *)seg_record +
335 seg_record_len);
336 }
337
338 err:
339 if (buf)
340 bnxt_fill_coredump_record(bp, buf + offset, start_time,
341 start_utc, coredump.total_segs + 1,
342 rc);
343 kfree(coredump.data);
344 *dump_len += sizeof(struct bnxt_coredump_record);
345 if (rc == -ENOBUFS)
346 netdev_err(bp->dev, "Firmware returned large coredump buffer\n");
347 return rc;
348 }
349
bnxt_get_coredump(struct bnxt * bp,u16 dump_type,void * buf,u32 * dump_len)350 int bnxt_get_coredump(struct bnxt *bp, u16 dump_type, void *buf, u32 *dump_len)
351 {
352 if (dump_type == BNXT_DUMP_CRASH) {
353 #ifdef CONFIG_TEE_BNXT_FW
354 return tee_bnxt_copy_coredump(buf, 0, *dump_len);
355 #else
356 return -EOPNOTSUPP;
357 #endif
358 } else {
359 return __bnxt_get_coredump(bp, buf, dump_len);
360 }
361 }
362
bnxt_get_coredump_length(struct bnxt * bp,u16 dump_type)363 u32 bnxt_get_coredump_length(struct bnxt *bp, u16 dump_type)
364 {
365 u32 len = 0;
366
367 if (dump_type == BNXT_DUMP_CRASH)
368 len = BNXT_CRASH_DUMP_LEN;
369 else
370 __bnxt_get_coredump(bp, NULL, &len);
371 return len;
372 }
373