1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2012 Cisco Systems, Inc. All rights reserved.
3
4 #include <linux/module.h>
5 #include <linux/mempool.h>
6 #include <linux/errno.h>
7 #include <linux/spinlock.h>
8 #include <linux/kallsyms.h>
9 #include <linux/time.h>
10 #include <linux/vmalloc.h>
11 #include "fnic_io.h"
12 #include "fnic.h"
13
14 unsigned int trace_max_pages;
15 static int fnic_max_trace_entries;
16
17 static unsigned long fnic_trace_buf_p;
18 static DEFINE_SPINLOCK(fnic_trace_lock);
19
20 static fnic_trace_dbg_t fnic_trace_entries;
21 int fnic_tracing_enabled = 1;
22
23 /* static char *fnic_fc_ctlr_trace_buf_p; */
24
25 static int fc_trace_max_entries;
26 static unsigned long fnic_fc_ctlr_trace_buf_p;
27 static fnic_trace_dbg_t fc_trace_entries;
28 int fnic_fc_tracing_enabled = 1;
29 int fnic_fc_trace_cleared = 1;
30 static DEFINE_SPINLOCK(fnic_fc_trace_lock);
31
32
33 /*
34 * fnic_trace_get_buf - Give buffer pointer to user to fill up trace information
35 *
36 * Description:
37 * This routine gets next available trace buffer entry location @wr_idx
38 * from allocated trace buffer pages and give that memory location
39 * to user to store the trace information.
40 *
41 * Return Value:
42 * This routine returns pointer to next available trace entry
43 * @fnic_buf_head for user to fill trace information.
44 */
fnic_trace_get_buf(void)45 fnic_trace_data_t *fnic_trace_get_buf(void)
46 {
47 unsigned long fnic_buf_head;
48 unsigned long flags;
49
50 spin_lock_irqsave(&fnic_trace_lock, flags);
51
52 /*
53 * Get next available memory location for writing trace information
54 * at @wr_idx and increment @wr_idx
55 */
56 fnic_buf_head =
57 fnic_trace_entries.page_offset[fnic_trace_entries.wr_idx];
58 fnic_trace_entries.wr_idx++;
59
60 /*
61 * Verify if trace buffer is full then change wd_idx to
62 * start from zero
63 */
64 if (fnic_trace_entries.wr_idx >= fnic_max_trace_entries)
65 fnic_trace_entries.wr_idx = 0;
66
67 /*
68 * Verify if write index @wr_idx and read index @rd_idx are same then
69 * increment @rd_idx to move to next entry in trace buffer
70 */
71 if (fnic_trace_entries.wr_idx == fnic_trace_entries.rd_idx) {
72 fnic_trace_entries.rd_idx++;
73 if (fnic_trace_entries.rd_idx >= fnic_max_trace_entries)
74 fnic_trace_entries.rd_idx = 0;
75 }
76 spin_unlock_irqrestore(&fnic_trace_lock, flags);
77 return (fnic_trace_data_t *)fnic_buf_head;
78 }
79
80 /*
81 * fnic_get_trace_data - Copy trace buffer to a memory file
82 * @fnic_dbgfs_t: pointer to debugfs trace buffer
83 *
84 * Description:
85 * This routine gathers the fnic trace debugfs data from the fnic_trace_data_t
86 * buffer and dumps it to fnic_dbgfs_t. It will start at the rd_idx entry in
87 * the log and process the log until the end of the buffer. Then it will gather
88 * from the beginning of the log and process until the current entry @wr_idx.
89 *
90 * Return Value:
91 * This routine returns the amount of bytes that were dumped into fnic_dbgfs_t
92 */
fnic_get_trace_data(fnic_dbgfs_t * fnic_dbgfs_prt)93 int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
94 {
95 int rd_idx;
96 int wr_idx;
97 int len = 0;
98 unsigned long flags;
99 char str[KSYM_SYMBOL_LEN];
100 struct timespec64 val;
101 fnic_trace_data_t *tbp;
102
103 spin_lock_irqsave(&fnic_trace_lock, flags);
104 rd_idx = fnic_trace_entries.rd_idx;
105 wr_idx = fnic_trace_entries.wr_idx;
106 if (wr_idx < rd_idx) {
107 while (1) {
108 /* Start from read index @rd_idx */
109 tbp = (fnic_trace_data_t *)
110 fnic_trace_entries.page_offset[rd_idx];
111 if (!tbp) {
112 spin_unlock_irqrestore(&fnic_trace_lock, flags);
113 return 0;
114 }
115 /* Convert function pointer to function name */
116 if (sizeof(unsigned long) < 8) {
117 sprint_symbol(str, tbp->fnaddr.low);
118 jiffies_to_timespec64(tbp->timestamp.low, &val);
119 } else {
120 sprint_symbol(str, tbp->fnaddr.val);
121 jiffies_to_timespec64(tbp->timestamp.val, &val);
122 }
123 /*
124 * Dump trace buffer entry to memory file
125 * and increment read index @rd_idx
126 */
127 len += scnprintf(fnic_dbgfs_prt->buffer + len,
128 (trace_max_pages * PAGE_SIZE * 3) - len,
129 "%16llu.%09lu %-50s %8x %8x %16llx %16llx "
130 "%16llx %16llx %16llx\n", (u64)val.tv_sec,
131 val.tv_nsec, str, tbp->host_no, tbp->tag,
132 tbp->data[0], tbp->data[1], tbp->data[2],
133 tbp->data[3], tbp->data[4]);
134 rd_idx++;
135 /*
136 * If rd_idx is reached to maximum trace entries
137 * then move rd_idx to zero
138 */
139 if (rd_idx > (fnic_max_trace_entries-1))
140 rd_idx = 0;
141 /*
142 * Continue dumping trace buffer entries into
143 * memory file till rd_idx reaches write index
144 */
145 if (rd_idx == wr_idx)
146 break;
147 }
148 } else if (wr_idx > rd_idx) {
149 while (1) {
150 /* Start from read index @rd_idx */
151 tbp = (fnic_trace_data_t *)
152 fnic_trace_entries.page_offset[rd_idx];
153 if (!tbp) {
154 spin_unlock_irqrestore(&fnic_trace_lock, flags);
155 return 0;
156 }
157 /* Convert function pointer to function name */
158 if (sizeof(unsigned long) < 8) {
159 sprint_symbol(str, tbp->fnaddr.low);
160 jiffies_to_timespec64(tbp->timestamp.low, &val);
161 } else {
162 sprint_symbol(str, tbp->fnaddr.val);
163 jiffies_to_timespec64(tbp->timestamp.val, &val);
164 }
165 /*
166 * Dump trace buffer entry to memory file
167 * and increment read index @rd_idx
168 */
169 len += scnprintf(fnic_dbgfs_prt->buffer + len,
170 (trace_max_pages * PAGE_SIZE * 3) - len,
171 "%16llu.%09lu %-50s %8x %8x %16llx %16llx "
172 "%16llx %16llx %16llx\n", (u64)val.tv_sec,
173 val.tv_nsec, str, tbp->host_no, tbp->tag,
174 tbp->data[0], tbp->data[1], tbp->data[2],
175 tbp->data[3], tbp->data[4]);
176 rd_idx++;
177 /*
178 * Continue dumping trace buffer entries into
179 * memory file till rd_idx reaches write index
180 */
181 if (rd_idx == wr_idx)
182 break;
183 }
184 }
185 spin_unlock_irqrestore(&fnic_trace_lock, flags);
186 return len;
187 }
188
189 /*
190 * fnic_get_stats_data - Copy fnic stats buffer to a memory file
191 * @fnic_dbgfs_t: pointer to debugfs fnic stats buffer
192 *
193 * Description:
194 * This routine gathers the fnic stats debugfs data from the fnic_stats struct
195 * and dumps it to stats_debug_info.
196 *
197 * Return Value:
198 * This routine returns the amount of bytes that were dumped into
199 * stats_debug_info
200 */
fnic_get_stats_data(struct stats_debug_info * debug,struct fnic_stats * stats)201 int fnic_get_stats_data(struct stats_debug_info *debug,
202 struct fnic_stats *stats)
203 {
204 int len = 0;
205 int buf_size = debug->buf_size;
206 struct timespec64 val1, val2;
207 int i = 0;
208
209 ktime_get_real_ts64(&val1);
210 len = scnprintf(debug->debug_buffer + len, buf_size - len,
211 "------------------------------------------\n"
212 "\t\tTime\n"
213 "------------------------------------------\n");
214
215 len += scnprintf(debug->debug_buffer + len, buf_size - len,
216 "Current time : [%lld:%ld]\n"
217 "Last stats reset time: [%lld:%09ld]\n"
218 "Last stats read time: [%lld:%ld]\n"
219 "delta since last reset: [%lld:%ld]\n"
220 "delta since last read: [%lld:%ld]\n",
221 (s64)val1.tv_sec, val1.tv_nsec,
222 (s64)stats->stats_timestamps.last_reset_time.tv_sec,
223 stats->stats_timestamps.last_reset_time.tv_nsec,
224 (s64)stats->stats_timestamps.last_read_time.tv_sec,
225 stats->stats_timestamps.last_read_time.tv_nsec,
226 (s64)timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_sec,
227 timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_nsec,
228 (s64)timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_sec,
229 timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_nsec);
230
231 stats->stats_timestamps.last_read_time = val1;
232
233 len += scnprintf(debug->debug_buffer + len, buf_size - len,
234 "------------------------------------------\n"
235 "\t\tIO Statistics\n"
236 "------------------------------------------\n");
237 len += scnprintf(debug->debug_buffer + len, buf_size - len,
238 "Number of Active IOs: %lld\nMaximum Active IOs: %lld\n"
239 "Number of IOs: %lld\nNumber of IO Completions: %lld\n"
240 "Number of IO Failures: %lld\nNumber of IO NOT Found: %lld\n"
241 "Number of Memory alloc Failures: %lld\n"
242 "Number of IOREQ Null: %lld\n"
243 "Number of SCSI cmd pointer Null: %lld\n"
244
245 "\nIO completion times: \n"
246 " < 10 ms : %lld\n"
247 " 10 ms - 100 ms : %lld\n"
248 " 100 ms - 500 ms : %lld\n"
249 " 500 ms - 5 sec: %lld\n"
250 " 5 sec - 10 sec: %lld\n"
251 " 10 sec - 30 sec: %lld\n"
252 " > 30 sec: %lld\n",
253 (u64)atomic64_read(&stats->io_stats.active_ios),
254 (u64)atomic64_read(&stats->io_stats.max_active_ios),
255 (u64)atomic64_read(&stats->io_stats.num_ios),
256 (u64)atomic64_read(&stats->io_stats.io_completions),
257 (u64)atomic64_read(&stats->io_stats.io_failures),
258 (u64)atomic64_read(&stats->io_stats.io_not_found),
259 (u64)atomic64_read(&stats->io_stats.alloc_failures),
260 (u64)atomic64_read(&stats->io_stats.ioreq_null),
261 (u64)atomic64_read(&stats->io_stats.sc_null),
262 (u64)atomic64_read(&stats->io_stats.io_btw_0_to_10_msec),
263 (u64)atomic64_read(&stats->io_stats.io_btw_10_to_100_msec),
264 (u64)atomic64_read(&stats->io_stats.io_btw_100_to_500_msec),
265 (u64)atomic64_read(&stats->io_stats.io_btw_500_to_5000_msec),
266 (u64)atomic64_read(&stats->io_stats.io_btw_5000_to_10000_msec),
267 (u64)atomic64_read(&stats->io_stats.io_btw_10000_to_30000_msec),
268 (u64)atomic64_read(&stats->io_stats.io_greater_than_30000_msec));
269
270 len += scnprintf(debug->debug_buffer + len, buf_size - len,
271 "------------------------------------------\n"
272 "\t\tIO Queues and cumulative IOs\n"
273 "------------------------------------------\n");
274
275 for (i = 0; i < FNIC_MQ_MAX_QUEUES; i++) {
276 len += scnprintf(debug->debug_buffer + len, buf_size - len,
277 "Q:%d -> %lld\n", i, (u64)atomic64_read(&stats->io_stats.ios[i]));
278 }
279
280 len += scnprintf(debug->debug_buffer + len, buf_size - len,
281 "\nCurrent Max IO time : %lld\n",
282 (u64)atomic64_read(&stats->io_stats.current_max_io_time));
283
284 len += scnprintf(debug->debug_buffer + len, buf_size - len,
285 "\n------------------------------------------\n"
286 "\t\tAbort Statistics\n"
287 "------------------------------------------\n");
288
289 len += scnprintf(debug->debug_buffer + len, buf_size - len,
290 "Number of Aborts: %lld\n"
291 "Number of Abort Failures: %lld\n"
292 "Number of Abort Driver Timeouts: %lld\n"
293 "Number of Abort FW Timeouts: %lld\n"
294 "Number of Abort IO NOT Found: %lld\n"
295
296 "Abort issued times: \n"
297 " < 6 sec : %lld\n"
298 " 6 sec - 20 sec : %lld\n"
299 " 20 sec - 30 sec : %lld\n"
300 " 30 sec - 40 sec : %lld\n"
301 " 40 sec - 50 sec : %lld\n"
302 " 50 sec - 60 sec : %lld\n"
303 " > 60 sec: %lld\n",
304
305 (u64)atomic64_read(&stats->abts_stats.aborts),
306 (u64)atomic64_read(&stats->abts_stats.abort_failures),
307 (u64)atomic64_read(&stats->abts_stats.abort_drv_timeouts),
308 (u64)atomic64_read(&stats->abts_stats.abort_fw_timeouts),
309 (u64)atomic64_read(&stats->abts_stats.abort_io_not_found),
310 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_0_to_6_sec),
311 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_6_to_20_sec),
312 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_20_to_30_sec),
313 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_30_to_40_sec),
314 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_40_to_50_sec),
315 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_50_to_60_sec),
316 (u64)atomic64_read(&stats->abts_stats.abort_issued_greater_than_60_sec));
317
318 len += scnprintf(debug->debug_buffer + len, buf_size - len,
319 "\n------------------------------------------\n"
320 "\t\tTerminate Statistics\n"
321 "------------------------------------------\n");
322
323 len += scnprintf(debug->debug_buffer + len, buf_size - len,
324 "Number of Terminates: %lld\n"
325 "Maximum Terminates: %lld\n"
326 "Number of Terminate Driver Timeouts: %lld\n"
327 "Number of Terminate FW Timeouts: %lld\n"
328 "Number of Terminate IO NOT Found: %lld\n"
329 "Number of Terminate Failures: %lld\n",
330 (u64)atomic64_read(&stats->term_stats.terminates),
331 (u64)atomic64_read(&stats->term_stats.max_terminates),
332 (u64)atomic64_read(&stats->term_stats.terminate_drv_timeouts),
333 (u64)atomic64_read(&stats->term_stats.terminate_fw_timeouts),
334 (u64)atomic64_read(&stats->term_stats.terminate_io_not_found),
335 (u64)atomic64_read(&stats->term_stats.terminate_failures));
336
337 len += scnprintf(debug->debug_buffer + len, buf_size - len,
338 "\n------------------------------------------\n"
339 "\t\tReset Statistics\n"
340 "------------------------------------------\n");
341
342 len += scnprintf(debug->debug_buffer + len, buf_size - len,
343 "Number of Device Resets: %lld\n"
344 "Number of Device Reset Failures: %lld\n"
345 "Number of Device Reset Aborts: %lld\n"
346 "Number of Device Reset Timeouts: %lld\n"
347 "Number of Device Reset Terminates: %lld\n"
348 "Number of FW Resets: %lld\n"
349 "Number of FW Reset Completions: %lld\n"
350 "Number of FW Reset Failures: %lld\n"
351 "Number of Fnic Reset: %lld\n"
352 "Number of Fnic Reset Completions: %lld\n"
353 "Number of Fnic Reset Failures: %lld\n",
354 (u64)atomic64_read(&stats->reset_stats.device_resets),
355 (u64)atomic64_read(&stats->reset_stats.device_reset_failures),
356 (u64)atomic64_read(&stats->reset_stats.device_reset_aborts),
357 (u64)atomic64_read(&stats->reset_stats.device_reset_timeouts),
358 (u64)atomic64_read(
359 &stats->reset_stats.device_reset_terminates),
360 (u64)atomic64_read(&stats->reset_stats.fw_resets),
361 (u64)atomic64_read(&stats->reset_stats.fw_reset_completions),
362 (u64)atomic64_read(&stats->reset_stats.fw_reset_failures),
363 (u64)atomic64_read(&stats->reset_stats.fnic_resets),
364 (u64)atomic64_read(
365 &stats->reset_stats.fnic_reset_completions),
366 (u64)atomic64_read(&stats->reset_stats.fnic_reset_failures));
367
368 len += scnprintf(debug->debug_buffer + len, buf_size - len,
369 "\n------------------------------------------\n"
370 "\t\tFirmware Statistics\n"
371 "------------------------------------------\n");
372
373 len += scnprintf(debug->debug_buffer + len, buf_size - len,
374 "Number of Active FW Requests %lld\n"
375 "Maximum FW Requests: %lld\n"
376 "Number of FW out of resources: %lld\n"
377 "Number of FW IO errors: %lld\n",
378 (u64)atomic64_read(&stats->fw_stats.active_fw_reqs),
379 (u64)atomic64_read(&stats->fw_stats.max_fw_reqs),
380 (u64)atomic64_read(&stats->fw_stats.fw_out_of_resources),
381 (u64)atomic64_read(&stats->fw_stats.io_fw_errs));
382
383 len += scnprintf(debug->debug_buffer + len, buf_size - len,
384 "\n------------------------------------------\n"
385 "\t\tVlan Discovery Statistics\n"
386 "------------------------------------------\n");
387
388 len += scnprintf(debug->debug_buffer + len, buf_size - len,
389 "Number of Vlan Discovery Requests Sent %lld\n"
390 "Vlan Response Received with no FCF VLAN ID: %lld\n"
391 "No solicitations recvd after vlan set, expiry count: %lld\n"
392 "Flogi rejects count: %lld\n",
393 (u64)atomic64_read(&stats->vlan_stats.vlan_disc_reqs),
394 (u64)atomic64_read(&stats->vlan_stats.resp_withno_vlanID),
395 (u64)atomic64_read(&stats->vlan_stats.sol_expiry_count),
396 (u64)atomic64_read(&stats->vlan_stats.flogi_rejects));
397
398 len += scnprintf(debug->debug_buffer + len, buf_size - len,
399 "\n------------------------------------------\n"
400 "\t\tOther Important Statistics\n"
401 "------------------------------------------\n");
402
403 jiffies_to_timespec64(stats->misc_stats.last_isr_time, &val1);
404 jiffies_to_timespec64(stats->misc_stats.last_ack_time, &val2);
405
406 len += scnprintf(debug->debug_buffer + len, buf_size - len,
407 "Last ISR time: %llu (%8llu.%09lu)\n"
408 "Last ACK time: %llu (%8llu.%09lu)\n"
409 "Max ISR jiffies: %llu\n"
410 "Max ISR time (ms) (0 denotes < 1 ms): %llu\n"
411 "Corr. work done: %llu\n"
412 "Number of ISRs: %lld\n"
413 "Maximum CQ Entries: %lld\n"
414 "Number of ACK index out of range: %lld\n"
415 "Number of data count mismatch: %lld\n"
416 "Number of FCPIO Timeouts: %lld\n"
417 "Number of FCPIO Aborted: %lld\n"
418 "Number of SGL Invalid: %lld\n"
419 "Number of Copy WQ Alloc Failures for ABTs: %lld\n"
420 "Number of Copy WQ Alloc Failures for Device Reset: %lld\n"
421 "Number of Copy WQ Alloc Failures for IOs: %lld\n"
422 "Number of no icmnd itmf Completions: %lld\n"
423 "Number of Check Conditions encountered: %lld\n"
424 "Number of QUEUE Fulls: %lld\n"
425 "Number of rport not ready: %lld\n"
426 "Number of receive frame errors: %lld\n",
427 (u64)stats->misc_stats.last_isr_time,
428 (s64)val1.tv_sec, val1.tv_nsec,
429 (u64)stats->misc_stats.last_ack_time,
430 (s64)val2.tv_sec, val2.tv_nsec,
431 (u64)atomic64_read(&stats->misc_stats.max_isr_jiffies),
432 (u64)atomic64_read(&stats->misc_stats.max_isr_time_ms),
433 (u64)atomic64_read(&stats->misc_stats.corr_work_done),
434 (u64)atomic64_read(&stats->misc_stats.isr_count),
435 (u64)atomic64_read(&stats->misc_stats.max_cq_entries),
436 (u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
437 (u64)atomic64_read(&stats->misc_stats.data_count_mismatch),
438 (u64)atomic64_read(&stats->misc_stats.fcpio_timeout),
439 (u64)atomic64_read(&stats->misc_stats.fcpio_aborted),
440 (u64)atomic64_read(&stats->misc_stats.sgl_invalid),
441 (u64)atomic64_read(
442 &stats->misc_stats.abts_cpwq_alloc_failures),
443 (u64)atomic64_read(
444 &stats->misc_stats.devrst_cpwq_alloc_failures),
445 (u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
446 (u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
447 (u64)atomic64_read(&stats->misc_stats.check_condition),
448 (u64)atomic64_read(&stats->misc_stats.queue_fulls),
449 (u64)atomic64_read(&stats->misc_stats.rport_not_ready),
450 (u64)atomic64_read(&stats->misc_stats.frame_errors));
451
452 len += scnprintf(debug->debug_buffer + len, buf_size - len,
453 "Firmware reported port speed: %llu\n",
454 (u64)atomic64_read(
455 &stats->misc_stats.current_port_speed));
456
457 return len;
458
459 }
460
461 /*
462 * fnic_trace_buf_init - Initialize fnic trace buffer logging facility
463 *
464 * Description:
465 * Initialize trace buffer data structure by allocating required memory and
466 * setting page_offset information for every trace entry by adding trace entry
467 * length to previous page_offset value.
468 */
fnic_trace_buf_init(void)469 int fnic_trace_buf_init(void)
470 {
471 unsigned long fnic_buf_head;
472 int i;
473 int err = 0;
474
475 trace_max_pages = fnic_trace_max_pages;
476 fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/
477 FNIC_ENTRY_SIZE_BYTES;
478
479 fnic_trace_buf_p = (unsigned long)vcalloc(trace_max_pages, PAGE_SIZE);
480 if (!fnic_trace_buf_p) {
481 printk(KERN_ERR PFX "Failed to allocate memory "
482 "for fnic_trace_buf_p\n");
483 err = -ENOMEM;
484 goto err_fnic_trace_buf_init;
485 }
486
487 fnic_trace_entries.page_offset =
488 vmalloc(array_size(fnic_max_trace_entries,
489 sizeof(unsigned long)));
490 if (!fnic_trace_entries.page_offset) {
491 printk(KERN_ERR PFX "Failed to allocate memory for"
492 " page_offset\n");
493 if (fnic_trace_buf_p) {
494 vfree((void *)fnic_trace_buf_p);
495 fnic_trace_buf_p = 0;
496 }
497 err = -ENOMEM;
498 goto err_fnic_trace_buf_init;
499 }
500 memset((void *)fnic_trace_entries.page_offset, 0,
501 (fnic_max_trace_entries * sizeof(unsigned long)));
502 fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
503 fnic_buf_head = fnic_trace_buf_p;
504
505 /*
506 * Set page_offset field of fnic_trace_entries struct by
507 * calculating memory location for every trace entry using
508 * length of each trace entry
509 */
510 for (i = 0; i < fnic_max_trace_entries; i++) {
511 fnic_trace_entries.page_offset[i] = fnic_buf_head;
512 fnic_buf_head += FNIC_ENTRY_SIZE_BYTES;
513 }
514 fnic_trace_debugfs_init();
515 pr_info("fnic: Successfully Initialized Trace Buffer\n");
516 return err;
517
518 err_fnic_trace_buf_init:
519 return err;
520 }
521
522 /*
523 * fnic_trace_free - Free memory of fnic trace data structures.
524 */
fnic_trace_free(void)525 void fnic_trace_free(void)
526 {
527 fnic_tracing_enabled = 0;
528 fnic_trace_debugfs_terminate();
529 if (fnic_trace_entries.page_offset) {
530 vfree((void *)fnic_trace_entries.page_offset);
531 fnic_trace_entries.page_offset = NULL;
532 }
533 if (fnic_trace_buf_p) {
534 vfree((void *)fnic_trace_buf_p);
535 fnic_trace_buf_p = 0;
536 }
537 printk(KERN_INFO PFX "Successfully Freed Trace Buffer\n");
538 }
539
540 /*
541 * fnic_fc_ctlr_trace_buf_init -
542 * Initialize trace buffer to log fnic control frames
543 * Description:
544 * Initialize trace buffer data structure by allocating
545 * required memory for trace data as well as for Indexes.
546 * Frame size is 256 bytes and
547 * memory is allocated for 1024 entries of 256 bytes.
548 * Page_offset(Index) is set to the address of trace entry
549 * and page_offset is initialized by adding frame size
550 * to the previous page_offset entry.
551 */
552
fnic_fc_trace_init(void)553 int fnic_fc_trace_init(void)
554 {
555 unsigned long fc_trace_buf_head;
556 int err = 0;
557 int i;
558
559 fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/
560 FC_TRC_SIZE_BYTES;
561 fnic_fc_ctlr_trace_buf_p =
562 (unsigned long)vmalloc(array_size(PAGE_SIZE,
563 fnic_fc_trace_max_pages));
564 if (!fnic_fc_ctlr_trace_buf_p) {
565 pr_err("fnic: Failed to allocate memory for "
566 "FC Control Trace Buf\n");
567 err = -ENOMEM;
568 goto err_fnic_fc_ctlr_trace_buf_init;
569 }
570
571 memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
572 fnic_fc_trace_max_pages * PAGE_SIZE);
573
574 /* Allocate memory for page offset */
575 fc_trace_entries.page_offset =
576 vmalloc(array_size(fc_trace_max_entries,
577 sizeof(unsigned long)));
578 if (!fc_trace_entries.page_offset) {
579 pr_err("fnic:Failed to allocate memory for page_offset\n");
580 if (fnic_fc_ctlr_trace_buf_p) {
581 pr_err("fnic: Freeing FC Control Trace Buf\n");
582 vfree((void *)fnic_fc_ctlr_trace_buf_p);
583 fnic_fc_ctlr_trace_buf_p = 0;
584 }
585 err = -ENOMEM;
586 goto err_fnic_fc_ctlr_trace_buf_init;
587 }
588 memset((void *)fc_trace_entries.page_offset, 0,
589 (fc_trace_max_entries * sizeof(unsigned long)));
590
591 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
592 fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p;
593
594 /*
595 * Set up fc_trace_entries.page_offset field with memory location
596 * for every trace entry
597 */
598 for (i = 0; i < fc_trace_max_entries; i++) {
599 fc_trace_entries.page_offset[i] = fc_trace_buf_head;
600 fc_trace_buf_head += FC_TRC_SIZE_BYTES;
601 }
602 fnic_fc_trace_debugfs_init();
603 pr_info("fnic: Successfully Initialized FC_CTLR Trace Buffer\n");
604 return err;
605
606 err_fnic_fc_ctlr_trace_buf_init:
607 return err;
608 }
609
610 /*
611 * Fnic_fc_ctlr_trace_free - Free memory of fnic_fc_ctlr trace data structures.
612 */
fnic_fc_trace_free(void)613 void fnic_fc_trace_free(void)
614 {
615 fnic_fc_tracing_enabled = 0;
616 fnic_fc_trace_debugfs_terminate();
617 if (fc_trace_entries.page_offset) {
618 vfree((void *)fc_trace_entries.page_offset);
619 fc_trace_entries.page_offset = NULL;
620 }
621 if (fnic_fc_ctlr_trace_buf_p) {
622 vfree((void *)fnic_fc_ctlr_trace_buf_p);
623 fnic_fc_ctlr_trace_buf_p = 0;
624 }
625 pr_info("fnic:Successfully FC_CTLR Freed Trace Buffer\n");
626 }
627
628 /*
629 * fnic_fc_ctlr_set_trace_data:
630 * Maintain rd & wr idx accordingly and set data
631 * Passed parameters:
632 * host_no: host number associated with fnic
633 * frame_type: send_frame, rece_frame or link event
634 * fc_frame: pointer to fc_frame
635 * frame_len: Length of the fc_frame
636 * Description:
637 * This routine will get next available wr_idx and
638 * copy all passed trace data to the buffer pointed by wr_idx
639 * and increment wr_idx. It will also make sure that we dont
640 * overwrite the entry which we are reading and also
641 * wrap around if we reach the maximum entries.
642 * Returned Value:
643 * It will return 0 for success or -1 for failure
644 */
fnic_fc_trace_set_data(u32 host_no,u8 frame_type,char * frame,u32 fc_trc_frame_len)645 int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
646 char *frame, u32 fc_trc_frame_len)
647 {
648 unsigned long flags;
649 struct fc_trace_hdr *fc_buf;
650 unsigned long eth_fcoe_hdr_len;
651 char *fc_trace;
652
653 if (fnic_fc_tracing_enabled == 0)
654 return 0;
655
656 spin_lock_irqsave(&fnic_fc_trace_lock, flags);
657
658 if (fnic_fc_trace_cleared == 1) {
659 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
660 pr_info("fnic: Resetting the read idx\n");
661 memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
662 fnic_fc_trace_max_pages * PAGE_SIZE);
663 fnic_fc_trace_cleared = 0;
664 }
665
666 fc_buf = (struct fc_trace_hdr *)
667 fc_trace_entries.page_offset[fc_trace_entries.wr_idx];
668
669 fc_trace_entries.wr_idx++;
670
671 if (fc_trace_entries.wr_idx >= fc_trace_max_entries)
672 fc_trace_entries.wr_idx = 0;
673
674 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
675 fc_trace_entries.rd_idx++;
676 if (fc_trace_entries.rd_idx >= fc_trace_max_entries)
677 fc_trace_entries.rd_idx = 0;
678 }
679
680 ktime_get_real_ts64(&fc_buf->time_stamp);
681 fc_buf->host_no = host_no;
682 fc_buf->frame_type = frame_type;
683
684 fc_trace = (char *)FC_TRACE_ADDRESS(fc_buf);
685
686 /* During the receive path, we do not have eth hdr as well as fcoe hdr
687 * at trace entry point so we will stuff 0xff just to make it generic.
688 */
689 if (frame_type == FNIC_FC_RECV) {
690 eth_fcoe_hdr_len = sizeof(struct ethhdr) +
691 sizeof(struct fcoe_hdr);
692 memset((char *)fc_trace, 0xff, eth_fcoe_hdr_len);
693 /* Copy the rest of data frame */
694 memcpy((char *)(fc_trace + eth_fcoe_hdr_len), (void *)frame,
695 min_t(u8, fc_trc_frame_len,
696 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE
697 - eth_fcoe_hdr_len)));
698 } else {
699 memcpy((char *)fc_trace, (void *)frame,
700 min_t(u8, fc_trc_frame_len,
701 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)));
702 }
703
704 /* Store the actual received length */
705 fc_buf->frame_len = fc_trc_frame_len;
706
707 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
708 return 0;
709 }
710
711 /*
712 * fnic_fc_ctlr_get_trace_data: Copy trace buffer to a memory file
713 * Passed parameter:
714 * @fnic_dbgfs_t: pointer to debugfs trace buffer
715 * rdata_flag: 1 => Unformatted file
716 * 0 => formatted file
717 * Description:
718 * This routine will copy the trace data to memory file with
719 * proper formatting and also copy to another memory
720 * file without formatting for further processing.
721 * Return Value:
722 * Number of bytes that were dumped into fnic_dbgfs_t
723 */
724
fnic_fc_trace_get_data(fnic_dbgfs_t * fnic_dbgfs_prt,u8 rdata_flag)725 int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag)
726 {
727 int rd_idx, wr_idx;
728 unsigned long flags;
729 int len = 0, j;
730 struct fc_trace_hdr *tdata;
731 char *fc_trace;
732
733 spin_lock_irqsave(&fnic_fc_trace_lock, flags);
734 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
735 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
736 pr_info("fnic: Buffer is empty\n");
737 return 0;
738 }
739 rd_idx = fc_trace_entries.rd_idx;
740 wr_idx = fc_trace_entries.wr_idx;
741 if (rdata_flag == 0) {
742 len += scnprintf(fnic_dbgfs_prt->buffer + len,
743 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
744 "Time Stamp (UTC)\t\t"
745 "Host No: F Type: len: FCoE_FRAME:\n");
746 }
747
748 while (rd_idx != wr_idx) {
749 tdata = (struct fc_trace_hdr *)
750 fc_trace_entries.page_offset[rd_idx];
751 if (!tdata) {
752 pr_info("fnic: Rd data is NULL\n");
753 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
754 return 0;
755 }
756 if (rdata_flag == 0) {
757 copy_and_format_trace_data(tdata,
758 fnic_dbgfs_prt, &len, rdata_flag);
759 } else {
760 fc_trace = (char *)tdata;
761 for (j = 0; j < FC_TRC_SIZE_BYTES; j++) {
762 len += scnprintf(fnic_dbgfs_prt->buffer + len,
763 (fnic_fc_trace_max_pages * PAGE_SIZE * 3)
764 - len, "%02x", fc_trace[j] & 0xff);
765 } /* for loop */
766 len += scnprintf(fnic_dbgfs_prt->buffer + len,
767 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
768 "\n");
769 }
770 rd_idx++;
771 if (rd_idx > (fc_trace_max_entries - 1))
772 rd_idx = 0;
773 }
774
775 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
776 return len;
777 }
778
779 /*
780 * copy_and_format_trace_data: Copy formatted data to char * buffer
781 * Passed Parameter:
782 * @fc_trace_hdr_t: pointer to trace data
783 * @fnic_dbgfs_t: pointer to debugfs trace buffer
784 * @orig_len: pointer to len
785 * rdata_flag: 0 => Formatted file, 1 => Unformatted file
786 * Description:
787 * This routine will format and copy the passed trace data
788 * for formatted file or unformatted file accordingly.
789 */
790
copy_and_format_trace_data(struct fc_trace_hdr * tdata,fnic_dbgfs_t * fnic_dbgfs_prt,int * orig_len,u8 rdata_flag)791 void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
792 fnic_dbgfs_t *fnic_dbgfs_prt, int *orig_len,
793 u8 rdata_flag)
794 {
795 int j, i = 1, len;
796 int ethhdr_len = sizeof(struct ethhdr) - 1;
797 int fcoehdr_len = sizeof(struct fcoe_hdr);
798 int fchdr_len = sizeof(struct fc_frame_header);
799 int max_size = fnic_fc_trace_max_pages * PAGE_SIZE * 3;
800 char *fc_trace;
801
802 tdata->frame_type = tdata->frame_type & 0x7F;
803
804 len = *orig_len;
805
806 len += scnprintf(fnic_dbgfs_prt->buffer + len, max_size - len,
807 "%ptTs.%09lu ns%8x %c%8x\t",
808 &tdata->time_stamp.tv_sec, tdata->time_stamp.tv_nsec,
809 tdata->host_no, tdata->frame_type, tdata->frame_len);
810
811 fc_trace = (char *)FC_TRACE_ADDRESS(tdata);
812
813 for (j = 0; j < min_t(u8, tdata->frame_len,
814 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)); j++) {
815 if (tdata->frame_type == FNIC_FC_LE) {
816 len += scnprintf(fnic_dbgfs_prt->buffer + len,
817 max_size - len, "%c", fc_trace[j]);
818 } else {
819 len += scnprintf(fnic_dbgfs_prt->buffer + len,
820 max_size - len, "%02x", fc_trace[j] & 0xff);
821 len += scnprintf(fnic_dbgfs_prt->buffer + len,
822 max_size - len, " ");
823 if (j == ethhdr_len ||
824 j == ethhdr_len + fcoehdr_len ||
825 j == ethhdr_len + fcoehdr_len + fchdr_len ||
826 (i > 3 && j%fchdr_len == 0)) {
827 len += scnprintf(fnic_dbgfs_prt->buffer
828 + len, max_size - len,
829 "\n\t\t\t\t\t\t\t\t");
830 i++;
831 }
832 } /* end of else*/
833 } /* End of for loop*/
834 len += scnprintf(fnic_dbgfs_prt->buffer + len,
835 max_size - len, "\n");
836 *orig_len = len;
837 }
838