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scsi: qedf: Fix error return code in __qedf_probe()
[linux-2.6-block.git] / drivers / scsi / fnic / fnic_trace.c
CommitLineData
4d7007b4
HP		 1/*
2 * Copyright 2012 Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 */
17
18#include <linux/module.h>
19#include <linux/mempool.h>
20#include <linux/errno.h>
21#include <linux/spinlock.h>
22#include <linux/kallsyms.h>
abb14148 23#include <linux/time.h>
d6472302 24#include <linux/vmalloc.h>
4d7007b4
HP		 25#include "fnic_io.h"
26#include "fnic.h"
27
28unsigned int trace_max_pages;
29static int fnic_max_trace_entries;
30
31static unsigned long fnic_trace_buf_p;
32static DEFINE_SPINLOCK(fnic_trace_lock);
33
34static fnic_trace_dbg_t fnic_trace_entries;
35int fnic_tracing_enabled = 1;
36
abb14148
HS		 37/* static char *fnic_fc_ctlr_trace_buf_p; */
38
39static int fc_trace_max_entries;
40static unsigned long fnic_fc_ctlr_trace_buf_p;
41static fnic_trace_dbg_t fc_trace_entries;
42int fnic_fc_tracing_enabled = 1;
43int fnic_fc_trace_cleared = 1;
44static DEFINE_SPINLOCK(fnic_fc_trace_lock);
45
46
4d7007b4
HP		 47/*
48 * fnic_trace_get_buf - Give buffer pointer to user to fill up trace information
49 *
50 * Description:
51 * This routine gets next available trace buffer entry location @wr_idx
52 * from allocated trace buffer pages and give that memory location
53 * to user to store the trace information.
54 *
55 * Return Value:
56 * This routine returns pointer to next available trace entry
57 * @fnic_buf_head for user to fill trace information.
58 */
59fnic_trace_data_t *fnic_trace_get_buf(void)
60{
61 unsigned long fnic_buf_head;
62 unsigned long flags;
63
64 spin_lock_irqsave(&fnic_trace_lock, flags);
65
66 /*
67 * Get next available memory location for writing trace information
68 * at @wr_idx and increment @wr_idx
69 */
70 fnic_buf_head =
71 fnic_trace_entries.page_offset[fnic_trace_entries.wr_idx];
72 fnic_trace_entries.wr_idx++;
73
74 /*
75 * Verify if trace buffer is full then change wd_idx to
76 * start from zero
77 */
78 if (fnic_trace_entries.wr_idx >= fnic_max_trace_entries)
79 fnic_trace_entries.wr_idx = 0;
80
81 /*
82 * Verify if write index @wr_idx and read index @rd_idx are same then
83 * increment @rd_idx to move to next entry in trace buffer
84 */
85 if (fnic_trace_entries.wr_idx == fnic_trace_entries.rd_idx) {
86 fnic_trace_entries.rd_idx++;
87 if (fnic_trace_entries.rd_idx >= fnic_max_trace_entries)
88 fnic_trace_entries.rd_idx = 0;
89 }
90 spin_unlock_irqrestore(&fnic_trace_lock, flags);
91 return (fnic_trace_data_t *)fnic_buf_head;
92}
93
94/*
95 * fnic_get_trace_data - Copy trace buffer to a memory file
96 * @fnic_dbgfs_t: pointer to debugfs trace buffer
97 *
98 * Description:
99 * This routine gathers the fnic trace debugfs data from the fnic_trace_data_t
100 * buffer and dumps it to fnic_dbgfs_t. It will start at the rd_idx entry in
101 * the log and process the log until the end of the buffer. Then it will gather
102 * from the beginning of the log and process until the current entry @wr_idx.
103 *
104 * Return Value:
105 * This routine returns the amount of bytes that were dumped into fnic_dbgfs_t
106 */
107int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
108{
109 int rd_idx;
110 int wr_idx;
111 int len = 0;
112 unsigned long flags;
113 char str[KSYM_SYMBOL_LEN];
114 struct timespec val;
115 fnic_trace_data_t *tbp;
116
117 spin_lock_irqsave(&fnic_trace_lock, flags);
118 rd_idx = fnic_trace_entries.rd_idx;
119 wr_idx = fnic_trace_entries.wr_idx;
120 if (wr_idx < rd_idx) {
121 while (1) {
122 /* Start from read index @rd_idx */
123 tbp = (fnic_trace_data_t *)
124 fnic_trace_entries.page_offset[rd_idx];
125 if (!tbp) {
126 spin_unlock_irqrestore(&fnic_trace_lock, flags);
127 return 0;
128 }
129 /* Convert function pointer to function name */
130 if (sizeof(unsigned long) < 8) {
131 sprint_symbol(str, tbp->fnaddr.low);
132 jiffies_to_timespec(tbp->timestamp.low, &val);
133 } else {
134 sprint_symbol(str, tbp->fnaddr.val);
135 jiffies_to_timespec(tbp->timestamp.val, &val);
136 }
137 /*
138 * Dump trace buffer entry to memory file
139 * and increment read index @rd_idx
140 */
141 len += snprintf(fnic_dbgfs_prt->buffer + len,
142 (trace_max_pages * PAGE_SIZE * 3) - len,
143 "%16lu.%16lu %-50s %8x %8x %16llx %16llx "
144 "%16llx %16llx %16llx\n", val.tv_sec,
145 val.tv_nsec, str, tbp->host_no, tbp->tag,
146 tbp->data[0], tbp->data[1], tbp->data[2],
147 tbp->data[3], tbp->data[4]);
148 rd_idx++;
149 /*
150 * If rd_idx is reached to maximum trace entries
151 * then move rd_idx to zero
152 */
153 if (rd_idx > (fnic_max_trace_entries-1))
154 rd_idx = 0;
155 /*
156 * Continure dumpping trace buffer entries into
157 * memory file till rd_idx reaches write index
158 */
159 if (rd_idx == wr_idx)
160 break;
161 }
162 } else if (wr_idx > rd_idx) {
163 while (1) {
164 /* Start from read index @rd_idx */
165 tbp = (fnic_trace_data_t *)
166 fnic_trace_entries.page_offset[rd_idx];
167 if (!tbp) {
168 spin_unlock_irqrestore(&fnic_trace_lock, flags);
169 return 0;
170 }
171 /* Convert function pointer to function name */
172 if (sizeof(unsigned long) < 8) {
173 sprint_symbol(str, tbp->fnaddr.low);
174 jiffies_to_timespec(tbp->timestamp.low, &val);
175 } else {
176 sprint_symbol(str, tbp->fnaddr.val);
177 jiffies_to_timespec(tbp->timestamp.val, &val);
178 }
179 /*
180 * Dump trace buffer entry to memory file
181 * and increment read index @rd_idx
182 */
183 len += snprintf(fnic_dbgfs_prt->buffer + len,
184 (trace_max_pages * PAGE_SIZE * 3) - len,
185 "%16lu.%16lu %-50s %8x %8x %16llx %16llx "
186 "%16llx %16llx %16llx\n", val.tv_sec,
187 val.tv_nsec, str, tbp->host_no, tbp->tag,
188 tbp->data[0], tbp->data[1], tbp->data[2],
189 tbp->data[3], tbp->data[4]);
190 rd_idx++;
191 /*
192 * Continue dumpping trace buffer entries into
193 * memory file till rd_idx reaches write index
194 */
195 if (rd_idx == wr_idx)
196 break;
197 }
198 }
199 spin_unlock_irqrestore(&fnic_trace_lock, flags);
200 return len;
201}
202
67125b02
HP		 203/*
204 * fnic_get_stats_data - Copy fnic stats buffer to a memory file
205 * @fnic_dbgfs_t: pointer to debugfs fnic stats buffer
206 *
207 * Description:
208 * This routine gathers the fnic stats debugfs data from the fnic_stats struct
209 * and dumps it to stats_debug_info.
210 *
211 * Return Value:
212 * This routine returns the amount of bytes that were dumped into
213 * stats_debug_info
214 */
215int fnic_get_stats_data(struct stats_debug_info *debug,
216 struct fnic_stats *stats)
217{
218 int len = 0;
219 int buf_size = debug->buf_size;
220 struct timespec val1, val2;
221
43caa03f 222 getnstimeofday(&val1);
67125b02 223 len = snprintf(debug->debug_buffer + len, buf_size - len,
43caa03f
SK		 224 "------------------------------------------\n"
225 "\t\tTime\n"
226 "------------------------------------------\n");
227
228 len += snprintf(debug->debug_buffer + len, buf_size - len,
229 "Current time : [%ld:%ld]\n"
230 "Last stats reset time: [%ld:%ld]\n"
231 "Last stats read time: [%ld:%ld]\n"
232 "delta since last reset: [%ld:%ld]\n"
233 "delta since last read: [%ld:%ld]\n",
234 val1.tv_sec, val1.tv_nsec,
235 stats->stats_timestamps.last_reset_time.tv_sec,
236 stats->stats_timestamps.last_reset_time.tv_nsec,
237 stats->stats_timestamps.last_read_time.tv_sec,
238 stats->stats_timestamps.last_read_time.tv_nsec,
239 timespec_sub(val1, stats->stats_timestamps.last_reset_time).tv_sec,
240 timespec_sub(val1, stats->stats_timestamps.last_reset_time).tv_nsec,
241 timespec_sub(val1, stats->stats_timestamps.last_read_time).tv_sec,
242 timespec_sub(val1, stats->stats_timestamps.last_read_time).tv_nsec);
243
244 stats->stats_timestamps.last_read_time = val1;
245
246 len += snprintf(debug->debug_buffer + len, buf_size - len,
67125b02
HP		 247 "------------------------------------------\n"
248 "\t\tIO Statistics\n"
249 "------------------------------------------\n");
250 len += snprintf(debug->debug_buffer + len, buf_size - len,
251 "Number of Active IOs: %lld\nMaximum Active IOs: %lld\n"
252 "Number of IOs: %lld\nNumber of IO Completions: %lld\n"
253 "Number of IO Failures: %lld\nNumber of IO NOT Found: %lld\n"
254 "Number of Memory alloc Failures: %lld\n"
255 "Number of IOREQ Null: %lld\n"
445d2960
SK		 256 "Number of SCSI cmd pointer Null: %lld\n"
257
258 "\nIO completion times: \n"
259 " < 10 ms : %lld\n"
260 " 10 ms - 100 ms : %lld\n"
261 " 100 ms - 500 ms : %lld\n"
262 " 500 ms - 5 sec: %lld\n"
263 " 5 sec - 10 sec: %lld\n"
264 " 10 sec - 30 sec: %lld\n"
265 " > 30 sec: %lld\n",
67125b02
HP		 266 (u64)atomic64_read(&stats->io_stats.active_ios),
267 (u64)atomic64_read(&stats->io_stats.max_active_ios),
268 (u64)atomic64_read(&stats->io_stats.num_ios),
269 (u64)atomic64_read(&stats->io_stats.io_completions),
270 (u64)atomic64_read(&stats->io_stats.io_failures),
271 (u64)atomic64_read(&stats->io_stats.io_not_found),
272 (u64)atomic64_read(&stats->io_stats.alloc_failures),
273 (u64)atomic64_read(&stats->io_stats.ioreq_null),
445d2960
SK		 274 (u64)atomic64_read(&stats->io_stats.sc_null),
275 (u64)atomic64_read(&stats->io_stats.io_btw_0_to_10_msec),
276 (u64)atomic64_read(&stats->io_stats.io_btw_10_to_100_msec),
277 (u64)atomic64_read(&stats->io_stats.io_btw_100_to_500_msec),
278 (u64)atomic64_read(&stats->io_stats.io_btw_500_to_5000_msec),
279 (u64)atomic64_read(&stats->io_stats.io_btw_5000_to_10000_msec),
280 (u64)atomic64_read(&stats->io_stats.io_btw_10000_to_30000_msec),
281 (u64)atomic64_read(&stats->io_stats.io_greater_than_30000_msec));
282
283 len += snprintf(debug->debug_buffer + len, buf_size - len,
284 "\nCurrent Max IO time : %lld\n",
285 (u64)atomic64_read(&stats->io_stats.current_max_io_time));
67125b02
HP		 286
287 len += snprintf(debug->debug_buffer + len, buf_size - len,
288 "\n------------------------------------------\n"
289 "\t\tAbort Statistics\n"
290 "------------------------------------------\n");
445d2960 291
67125b02
HP		 292 len += snprintf(debug->debug_buffer + len, buf_size - len,
293 "Number of Aborts: %lld\n"
294 "Number of Abort Failures: %lld\n"
295 "Number of Abort Driver Timeouts: %lld\n"
296 "Number of Abort FW Timeouts: %lld\n"
445d2960
SK		 297 "Number of Abort IO NOT Found: %lld\n"
298
299 "Abord issued times: \n"
300 " < 6 sec : %lld\n"
301 " 6 sec - 20 sec : %lld\n"
302 " 20 sec - 30 sec : %lld\n"
303 " 30 sec - 40 sec : %lld\n"
304 " 40 sec - 50 sec : %lld\n"
305 " 50 sec - 60 sec : %lld\n"
306 " > 60 sec: %lld\n",
307
67125b02
HP		 308 (u64)atomic64_read(&stats->abts_stats.aborts),
309 (u64)atomic64_read(&stats->abts_stats.abort_failures),
310 (u64)atomic64_read(&stats->abts_stats.abort_drv_timeouts),
311 (u64)atomic64_read(&stats->abts_stats.abort_fw_timeouts),
445d2960
SK		 312 (u64)atomic64_read(&stats->abts_stats.abort_io_not_found),
313 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_0_to_6_sec),
314 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_6_to_20_sec),
315 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_20_to_30_sec),
316 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_30_to_40_sec),
317 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_40_to_50_sec),
318 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_50_to_60_sec),
319 (u64)atomic64_read(&stats->abts_stats.abort_issued_greater_than_60_sec));
67125b02
HP		 320
321 len += snprintf(debug->debug_buffer + len, buf_size - len,
322 "\n------------------------------------------\n"
323 "\t\tTerminate Statistics\n"
324 "------------------------------------------\n");
445d2960 325
67125b02
HP		 326 len += snprintf(debug->debug_buffer + len, buf_size - len,
327 "Number of Terminates: %lld\n"
328 "Maximum Terminates: %lld\n"
329 "Number of Terminate Driver Timeouts: %lld\n"
330 "Number of Terminate FW Timeouts: %lld\n"
331 "Number of Terminate IO NOT Found: %lld\n"
332 "Number of Terminate Failures: %lld\n",
333 (u64)atomic64_read(&stats->term_stats.terminates),
334 (u64)atomic64_read(&stats->term_stats.max_terminates),
335 (u64)atomic64_read(&stats->term_stats.terminate_drv_timeouts),
336 (u64)atomic64_read(&stats->term_stats.terminate_fw_timeouts),
337 (u64)atomic64_read(&stats->term_stats.terminate_io_not_found),
338 (u64)atomic64_read(&stats->term_stats.terminate_failures));
339
340 len += snprintf(debug->debug_buffer + len, buf_size - len,
341 "\n------------------------------------------\n"
342 "\t\tReset Statistics\n"
343 "------------------------------------------\n");
344
345 len += snprintf(debug->debug_buffer + len, buf_size - len,
346 "Number of Device Resets: %lld\n"
347 "Number of Device Reset Failures: %lld\n"
348 "Number of Device Reset Aborts: %lld\n"
349 "Number of Device Reset Timeouts: %lld\n"
350 "Number of Device Reset Terminates: %lld\n"
351 "Number of FW Resets: %lld\n"
352 "Number of FW Reset Completions: %lld\n"
353 "Number of FW Reset Failures: %lld\n"
354 "Number of Fnic Reset: %lld\n"
355 "Number of Fnic Reset Completions: %lld\n"
356 "Number of Fnic Reset Failures: %lld\n",
357 (u64)atomic64_read(&stats->reset_stats.device_resets),
358 (u64)atomic64_read(&stats->reset_stats.device_reset_failures),
359 (u64)atomic64_read(&stats->reset_stats.device_reset_aborts),
360 (u64)atomic64_read(&stats->reset_stats.device_reset_timeouts),
361 (u64)atomic64_read(
362 &stats->reset_stats.device_reset_terminates),
363 (u64)atomic64_read(&stats->reset_stats.fw_resets),
364 (u64)atomic64_read(&stats->reset_stats.fw_reset_completions),
365 (u64)atomic64_read(&stats->reset_stats.fw_reset_failures),
366 (u64)atomic64_read(&stats->reset_stats.fnic_resets),
367 (u64)atomic64_read(
368 &stats->reset_stats.fnic_reset_completions),
369 (u64)atomic64_read(&stats->reset_stats.fnic_reset_failures));
370
371 len += snprintf(debug->debug_buffer + len, buf_size - len,
372 "\n------------------------------------------\n"
373 "\t\tFirmware Statistics\n"
374 "------------------------------------------\n");
375
376 len += snprintf(debug->debug_buffer + len, buf_size - len,
377 "Number of Active FW Requests %lld\n"
378 "Maximum FW Requests: %lld\n"
379 "Number of FW out of resources: %lld\n"
380 "Number of FW IO errors: %lld\n",
381 (u64)atomic64_read(&stats->fw_stats.active_fw_reqs),
382 (u64)atomic64_read(&stats->fw_stats.max_fw_reqs),
383 (u64)atomic64_read(&stats->fw_stats.fw_out_of_resources),
384 (u64)atomic64_read(&stats->fw_stats.io_fw_errs));
385
386 len += snprintf(debug->debug_buffer + len, buf_size - len,
387 "\n------------------------------------------\n"
388 "\t\tVlan Discovery Statistics\n"
389 "------------------------------------------\n");
390
391 len += snprintf(debug->debug_buffer + len, buf_size - len,
392 "Number of Vlan Discovery Requests Sent %lld\n"
393 "Vlan Response Received with no FCF VLAN ID: %lld\n"
394 "No solicitations recvd after vlan set, expiry count: %lld\n"
395 "Flogi rejects count: %lld\n",
396 (u64)atomic64_read(&stats->vlan_stats.vlan_disc_reqs),
397 (u64)atomic64_read(&stats->vlan_stats.resp_withno_vlanID),
398 (u64)atomic64_read(&stats->vlan_stats.sol_expiry_count),
399 (u64)atomic64_read(&stats->vlan_stats.flogi_rejects));
400
401 len += snprintf(debug->debug_buffer + len, buf_size - len,
402 "\n------------------------------------------\n"
403 "\t\tOther Important Statistics\n"
404 "------------------------------------------\n");
405
406 jiffies_to_timespec(stats->misc_stats.last_isr_time, &val1);
407 jiffies_to_timespec(stats->misc_stats.last_ack_time, &val2);
408
409 len += snprintf(debug->debug_buffer + len, buf_size - len,
410 "Last ISR time: %llu (%8lu.%8lu)\n"
411 "Last ACK time: %llu (%8lu.%8lu)\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"
39fcbbc0 423 "Number of Check Conditions encountered: %lld\n"
67125b02
HP		 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 val1.tv_sec, val1.tv_nsec,
429 (u64)stats->misc_stats.last_ack_time,
430 val2.tv_sec, val2.tv_nsec,
431 (u64)atomic64_read(&stats->misc_stats.isr_count),
432 (u64)atomic64_read(&stats->misc_stats.max_cq_entries),
433 (u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
434 (u64)atomic64_read(&stats->misc_stats.data_count_mismatch),
435 (u64)atomic64_read(&stats->misc_stats.fcpio_timeout),
436 (u64)atomic64_read(&stats->misc_stats.fcpio_aborted),
437 (u64)atomic64_read(&stats->misc_stats.sgl_invalid),
438 (u64)atomic64_read(
439 &stats->misc_stats.abts_cpwq_alloc_failures),
440 (u64)atomic64_read(
441 &stats->misc_stats.devrst_cpwq_alloc_failures),
442 (u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
443 (u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
39fcbbc0 444 (u64)atomic64_read(&stats->misc_stats.check_condition),
67125b02
HP		 445 (u64)atomic64_read(&stats->misc_stats.queue_fulls),
446 (u64)atomic64_read(&stats->misc_stats.rport_not_ready),
447 (u64)atomic64_read(&stats->misc_stats.frame_errors));
448
449 return len;
450
451}
452
4d7007b4
HP		 453/*
454 * fnic_trace_buf_init - Initialize fnic trace buffer logging facility
455 *
456 * Description:
457 * Initialize trace buffer data structure by allocating required memory and
458 * setting page_offset information for every trace entry by adding trace entry
459 * length to previous page_offset value.
460 */
461int fnic_trace_buf_init(void)
462{
463 unsigned long fnic_buf_head;
464 int i;
465 int err = 0;
466
467 trace_max_pages = fnic_trace_max_pages;
468 fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/
469 FNIC_ENTRY_SIZE_BYTES;
470
471 fnic_trace_buf_p = (unsigned long)vmalloc((trace_max_pages * PAGE_SIZE));
472 if (!fnic_trace_buf_p) {
473 printk(KERN_ERR PFX "Failed to allocate memory "
474 "for fnic_trace_buf_p\n");
475 err = -ENOMEM;
476 goto err_fnic_trace_buf_init;
477 }
478 memset((void *)fnic_trace_buf_p, 0, (trace_max_pages * PAGE_SIZE));
479
480 fnic_trace_entries.page_offset = vmalloc(fnic_max_trace_entries *
481 sizeof(unsigned long));
482 if (!fnic_trace_entries.page_offset) {
483 printk(KERN_ERR PFX "Failed to allocate memory for"
484 " page_offset\n");
485 if (fnic_trace_buf_p) {
486 vfree((void *)fnic_trace_buf_p);
487 fnic_trace_buf_p = 0;
488 }
489 err = -ENOMEM;
490 goto err_fnic_trace_buf_init;
491 }
492 memset((void *)fnic_trace_entries.page_offset, 0,
493 (fnic_max_trace_entries * sizeof(unsigned long)));
494 fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
495 fnic_buf_head = fnic_trace_buf_p;
496
497 /*
498 * Set page_offset field of fnic_trace_entries struct by
499 * calculating memory location for every trace entry using
500 * length of each trace entry
501 */
502 for (i = 0; i < fnic_max_trace_entries; i++) {
503 fnic_trace_entries.page_offset[i] = fnic_buf_head;
504 fnic_buf_head += FNIC_ENTRY_SIZE_BYTES;
505 }
506 err = fnic_trace_debugfs_init();
507 if (err < 0) {
abb14148 508 pr_err("fnic: Failed to initialize debugfs for tracing\n");
4d7007b4
HP		 509 goto err_fnic_trace_debugfs_init;
510 }
abb14148 511 pr_info("fnic: Successfully Initialized Trace Buffer\n");
4d7007b4
HP		 512 return err;
513err_fnic_trace_debugfs_init:
514 fnic_trace_free();
515err_fnic_trace_buf_init:
516 return err;
517}
518
519/*
520 * fnic_trace_free - Free memory of fnic trace data structures.
521 */
522void fnic_trace_free(void)
523{
524 fnic_tracing_enabled = 0;
525 fnic_trace_debugfs_terminate();
526 if (fnic_trace_entries.page_offset) {
527 vfree((void *)fnic_trace_entries.page_offset);
528 fnic_trace_entries.page_offset = NULL;
529 }
530 if (fnic_trace_buf_p) {
531 vfree((void *)fnic_trace_buf_p);
532 fnic_trace_buf_p = 0;
533 }
534 printk(KERN_INFO PFX "Successfully Freed Trace Buffer\n");
535}
abb14148
HS		 536
537/*
538 * fnic_fc_ctlr_trace_buf_init -
539 * Initialize trace buffer to log fnic control frames
540 * Description:
541 * Initialize trace buffer data structure by allocating
542 * required memory for trace data as well as for Indexes.
543 * Frame size is 256 bytes and
544 * memory is allocated for 1024 entries of 256 bytes.
545 * Page_offset(Index) is set to the address of trace entry
546 * and page_offset is initialized by adding frame size
547 * to the previous page_offset entry.
548 */
549
550int fnic_fc_trace_init(void)
551{
552 unsigned long fc_trace_buf_head;
553 int err = 0;
554 int i;
555
556 fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/
557 FC_TRC_SIZE_BYTES;
558 fnic_fc_ctlr_trace_buf_p = (unsigned long)vmalloc(
559 fnic_fc_trace_max_pages * PAGE_SIZE);
560 if (!fnic_fc_ctlr_trace_buf_p) {
561 pr_err("fnic: Failed to allocate memory for "
562 "FC Control Trace Buf\n");
563 err = -ENOMEM;
564 goto err_fnic_fc_ctlr_trace_buf_init;
565 }
566
567 memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
568 fnic_fc_trace_max_pages * PAGE_SIZE);
569
570 /* Allocate memory for page offset */
571 fc_trace_entries.page_offset = vmalloc(fc_trace_max_entries *
572 sizeof(unsigned long));
573 if (!fc_trace_entries.page_offset) {
574 pr_err("fnic:Failed to allocate memory for page_offset\n");
575 if (fnic_fc_ctlr_trace_buf_p) {
576 pr_err("fnic: Freeing FC Control Trace Buf\n");
577 vfree((void *)fnic_fc_ctlr_trace_buf_p);
578 fnic_fc_ctlr_trace_buf_p = 0;
579 }
580 err = -ENOMEM;
581 goto err_fnic_fc_ctlr_trace_buf_init;
582 }
583 memset((void *)fc_trace_entries.page_offset, 0,
584 (fc_trace_max_entries * sizeof(unsigned long)));
585
586 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
587 fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p;
588
589 /*
590 * Set up fc_trace_entries.page_offset field with memory location
591 * for every trace entry
592 */
593 for (i = 0; i < fc_trace_max_entries; i++) {
594 fc_trace_entries.page_offset[i] = fc_trace_buf_head;
595 fc_trace_buf_head += FC_TRC_SIZE_BYTES;
596 }
597 err = fnic_fc_trace_debugfs_init();
598 if (err < 0) {
599 pr_err("fnic: Failed to initialize FC_CTLR tracing.\n");
600 goto err_fnic_fc_ctlr_trace_debugfs_init;
601 }
602 pr_info("fnic: Successfully Initialized FC_CTLR Trace Buffer\n");
603 return err;
604
605err_fnic_fc_ctlr_trace_debugfs_init:
606 fnic_fc_trace_free();
607err_fnic_fc_ctlr_trace_buf_init:
608 return err;
609}
610
611/*
612 * Fnic_fc_ctlr_trace_free - Free memory of fnic_fc_ctlr trace data structures.
613 */
614void fnic_fc_trace_free(void)
615{
616 fnic_fc_tracing_enabled = 0;
617 fnic_fc_trace_debugfs_terminate();
618 if (fc_trace_entries.page_offset) {
619 vfree((void *)fc_trace_entries.page_offset);
620 fc_trace_entries.page_offset = NULL;
621 }
622 if (fnic_fc_ctlr_trace_buf_p) {
623 vfree((void *)fnic_fc_ctlr_trace_buf_p);
624 fnic_fc_ctlr_trace_buf_p = 0;
625 }
626 pr_info("fnic:Successfully FC_CTLR Freed Trace Buffer\n");
627}
628
629/*
630 * fnic_fc_ctlr_set_trace_data:
631 * Maintain rd & wr idx accordingly and set data
632 * Passed parameters:
633 * host_no: host number accociated with fnic
634 * frame_type: send_frame, rece_frame or link event
635 * fc_frame: pointer to fc_frame
636 * frame_len: Length of the fc_frame
637 * Description:
638 * This routine will get next available wr_idx and
639 * copy all passed trace data to the buffer pointed by wr_idx
640 * and increment wr_idx. It will also make sure that we dont
641 * overwrite the entry which we are reading and also
642 * wrap around if we reach the maximum entries.
643 * Returned Value:
644 * It will return 0 for success or -1 for failure
645 */
646int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
647 char *frame, u32 fc_trc_frame_len)
648{
649 unsigned long flags;
650 struct fc_trace_hdr *fc_buf;
651 unsigned long eth_fcoe_hdr_len;
652 char *fc_trace;
653
654 if (fnic_fc_tracing_enabled == 0)
655 return 0;
656
657 spin_lock_irqsave(&fnic_fc_trace_lock, flags);
658
659 if (fnic_fc_trace_cleared == 1) {
660 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
1a84db56 661 pr_info("fnic: Resetting the read idx\n");
abb14148
HS		 662 memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
663 fnic_fc_trace_max_pages * PAGE_SIZE);
664 fnic_fc_trace_cleared = 0;
665 }
666
667 fc_buf = (struct fc_trace_hdr *)
668 fc_trace_entries.page_offset[fc_trace_entries.wr_idx];
669
670 fc_trace_entries.wr_idx++;
671
672 if (fc_trace_entries.wr_idx >= fc_trace_max_entries)
673 fc_trace_entries.wr_idx = 0;
674
675 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
676 fc_trace_entries.rd_idx++;
677 if (fc_trace_entries.rd_idx >= fc_trace_max_entries)
678 fc_trace_entries.rd_idx = 0;
679 }
680
48c4676d 681 ktime_get_real_ts64(&fc_buf->time_stamp);
abb14148
HS		 682 fc_buf->host_no = host_no;
683 fc_buf->frame_type = frame_type;
684
685 fc_trace = (char *)FC_TRACE_ADDRESS(fc_buf);
686
687 /* During the receive path, we do not have eth hdr as well as fcoe hdr
688 * at trace entry point so we will stuff 0xff just to make it generic.
689 */
690 if (frame_type == FNIC_FC_RECV) {
691 eth_fcoe_hdr_len = sizeof(struct ethhdr) +
692 sizeof(struct fcoe_hdr);
abb14148
HS		 693 memset((char *)fc_trace, 0xff, eth_fcoe_hdr_len);
694 /* Copy the rest of data frame */
695 memcpy((char *)(fc_trace + eth_fcoe_hdr_len), (void *)frame,
696 min_t(u8, fc_trc_frame_len,
042b356a
HS		 697 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE
698 - eth_fcoe_hdr_len)));
abb14148
HS		 699 } else {
700 memcpy((char *)fc_trace, (void *)frame,
701 min_t(u8, fc_trc_frame_len,
702 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)));
703 }
704
705 /* Store the actual received length */
706 fc_buf->frame_len = fc_trc_frame_len;
707
708 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
709 return 0;
710}
711
712/*
713 * fnic_fc_ctlr_get_trace_data: Copy trace buffer to a memory file
714 * Passed parameter:
715 * @fnic_dbgfs_t: pointer to debugfs trace buffer
716 * rdata_flag: 1 => Unformated file
717 * 0 => formated file
718 * Description:
719 * This routine will copy the trace data to memory file with
720 * proper formatting and also copy to another memory
721 * file without formatting for further procesing.
722 * Retrun Value:
723 * Number of bytes that were dumped into fnic_dbgfs_t
724 */
725
726int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag)
727{
728 int rd_idx, wr_idx;
729 unsigned long flags;
730 int len = 0, j;
731 struct fc_trace_hdr *tdata;
732 char *fc_trace;
733
734 spin_lock_irqsave(&fnic_fc_trace_lock, flags);
735 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
736 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
737 pr_info("fnic: Buffer is empty\n");
738 return 0;
739 }
740 rd_idx = fc_trace_entries.rd_idx;
741 wr_idx = fc_trace_entries.wr_idx;
742 if (rdata_flag == 0) {
743 len += snprintf(fnic_dbgfs_prt->buffer + len,
744 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
745 "Time Stamp (UTC)\t\t"
746 "Host No: F Type: len: FCoE_FRAME:\n");
747 }
748
749 while (rd_idx != wr_idx) {
750 tdata = (struct fc_trace_hdr *)
751 fc_trace_entries.page_offset[rd_idx];
752 if (!tdata) {
753 pr_info("fnic: Rd data is NULL\n");
754 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
755 return 0;
756 }
757 if (rdata_flag == 0) {
758 copy_and_format_trace_data(tdata,
759 fnic_dbgfs_prt, &len, rdata_flag);
760 } else {
761 fc_trace = (char *)tdata;
762 for (j = 0; j < FC_TRC_SIZE_BYTES; j++) {
763 len += snprintf(fnic_dbgfs_prt->buffer + len,
764 (fnic_fc_trace_max_pages * PAGE_SIZE * 3)
765 - len, "%02x", fc_trace[j] & 0xff);
766 } /* for loop */
767 len += snprintf(fnic_dbgfs_prt->buffer + len,
768 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
769 "\n");
770 }
771 rd_idx++;
772 if (rd_idx > (fc_trace_max_entries - 1))
773 rd_idx = 0;
774 }
775
776 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
777 return len;
778}
779
780/*
781 * copy_and_format_trace_data: Copy formatted data to char * buffer
782 * Passed Parameter:
783 * @fc_trace_hdr_t: pointer to trace data
784 * @fnic_dbgfs_t: pointer to debugfs trace buffer
785 * @orig_len: pointer to len
786 * rdata_flag: 0 => Formated file, 1 => Unformated file
787 * Description:
788 * This routine will format and copy the passed trace data
789 * for formated file or unformated file accordingly.
790 */
791
792void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
793 fnic_dbgfs_t *fnic_dbgfs_prt, int *orig_len,
794 u8 rdata_flag)
795{
796 struct tm tm;
797 int j, i = 1, len;
798 char *fc_trace, *fmt;
799 int ethhdr_len = sizeof(struct ethhdr) - 1;
800 int fcoehdr_len = sizeof(struct fcoe_hdr);
801 int fchdr_len = sizeof(struct fc_frame_header);
802 int max_size = fnic_fc_trace_max_pages * PAGE_SIZE * 3;
803
804 tdata->frame_type = tdata->frame_type & 0x7F;
805
806 len = *orig_len;
807
48c4676d 808 time64_to_tm(tdata->time_stamp.tv_sec, 0, &tm);
abb14148
HS		 809
810 fmt = "%02d:%02d:%04ld %02d:%02d:%02d.%09lu ns%8x %c%8x\t";
811 len += snprintf(fnic_dbgfs_prt->buffer + len,
86001f24 812 max_size - len,
abb14148
HS		 813 fmt,
814 tm.tm_mon + 1, tm.tm_mday, tm.tm_year + 1900,
815 tm.tm_hour, tm.tm_min, tm.tm_sec,
816 tdata->time_stamp.tv_nsec, tdata->host_no,
817 tdata->frame_type, tdata->frame_len);
818
819 fc_trace = (char *)FC_TRACE_ADDRESS(tdata);
820
821 for (j = 0; j < min_t(u8, tdata->frame_len,
822 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)); j++) {
823 if (tdata->frame_type == FNIC_FC_LE) {
824 len += snprintf(fnic_dbgfs_prt->buffer + len,
825 max_size - len, "%c", fc_trace[j]);
826 } else {
827 len += snprintf(fnic_dbgfs_prt->buffer + len,
828 max_size - len, "%02x", fc_trace[j] & 0xff);
829 len += snprintf(fnic_dbgfs_prt->buffer + len,
830 max_size - len, " ");
831 if (j == ethhdr_len ||
832 j == ethhdr_len + fcoehdr_len ||
833 j == ethhdr_len + fcoehdr_len + fchdr_len ||
834 (i > 3 && j%fchdr_len == 0)) {
835 len += snprintf(fnic_dbgfs_prt->buffer
86001f24 836 + len, max_size - len,
abb14148
HS		 837 "\n\t\t\t\t\t\t\t\t");
838 i++;
839 }
840 } /* end of else*/
841 } /* End of for loop*/
842 len += snprintf(fnic_dbgfs_prt->buffer + len,
843 max_size - len, "\n");
844 *orig_len = len;
845}
Linux 6.x block layer and io_uring tree(s)