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Merge branch 'for-linus' into next
[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];
22807aa8 114 struct timespec64 val;
4d7007b4
HP		 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);
22807aa8 132 jiffies_to_timespec64(tbp->timestamp.low, &val);
4d7007b4
HP		 133 } else {
134 sprint_symbol(str, tbp->fnaddr.val);
22807aa8 135 jiffies_to_timespec64(tbp->timestamp.val, &val);
4d7007b4
HP		 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,
22807aa8
AB		 143 "%16llu.%09lu %-50s %8x %8x %16llx %16llx "
144 "%16llx %16llx %16llx\n", (u64)val.tv_sec,
4d7007b4
HP		 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);
22807aa8 174 jiffies_to_timespec64(tbp->timestamp.low, &val);
4d7007b4
HP		 175 } else {
176 sprint_symbol(str, tbp->fnaddr.val);
22807aa8 177 jiffies_to_timespec64(tbp->timestamp.val, &val);
4d7007b4
HP		 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,
22807aa8
AB		 185 "%16llu.%09lu %-50s %8x %8x %16llx %16llx "
186 "%16llx %16llx %16llx\n", (u64)val.tv_sec,
4d7007b4
HP		 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;
22807aa8 220 struct timespec64 val1, val2;
67125b02 221
22807aa8 222 ktime_get_real_ts64(&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,
22807aa8
AB		 229 "Current time : [%lld:%ld]\n"
230 "Last stats reset time: [%lld:%09ld]\n"
231 "Last stats read time: [%lld:%ld]\n"
232 "delta since last reset: [%lld:%ld]\n"
233 "delta since last read: [%lld:%ld]\n",
234 (s64)val1.tv_sec, val1.tv_nsec,
235 (s64)stats->stats_timestamps.last_reset_time.tv_sec,
43caa03f 236 stats->stats_timestamps.last_reset_time.tv_nsec,
22807aa8 237 (s64)stats->stats_timestamps.last_read_time.tv_sec,
43caa03f 238 stats->stats_timestamps.last_read_time.tv_nsec,
22807aa8
AB		 239 (s64)timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_sec,
240 timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_nsec,
241 (s64)timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_sec,
242 timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_nsec);
43caa03f
SK		 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
0cfce53a 299 "Abort issued times: \n"
445d2960
SK		 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
22807aa8
AB		 406 jiffies_to_timespec64(stats->misc_stats.last_isr_time, &val1);
407 jiffies_to_timespec64(stats->misc_stats.last_ack_time, &val2);
67125b02
HP		 408
409 len += snprintf(debug->debug_buffer + len, buf_size - len,
22807aa8
AB		 410 "Last ISR time: %llu (%8llu.%09lu)\n"
411 "Last ACK time: %llu (%8llu.%09lu)\n"
3567dca1
SK		 412 "Max ISR jiffies: %llu\n"
413 "Max ISR time (ms) (0 denotes < 1 ms): %llu\n"
414 "Corr. work done: %llu\n"
67125b02
HP		 415 "Number of ISRs: %lld\n"
416 "Maximum CQ Entries: %lld\n"
417 "Number of ACK index out of range: %lld\n"
418 "Number of data count mismatch: %lld\n"
419 "Number of FCPIO Timeouts: %lld\n"
420 "Number of FCPIO Aborted: %lld\n"
421 "Number of SGL Invalid: %lld\n"
422 "Number of Copy WQ Alloc Failures for ABTs: %lld\n"
423 "Number of Copy WQ Alloc Failures for Device Reset: %lld\n"
424 "Number of Copy WQ Alloc Failures for IOs: %lld\n"
425 "Number of no icmnd itmf Completions: %lld\n"
39fcbbc0 426 "Number of Check Conditions encountered: %lld\n"
67125b02
HP		 427 "Number of QUEUE Fulls: %lld\n"
428 "Number of rport not ready: %lld\n"
429 "Number of receive frame errors: %lld\n",
430 (u64)stats->misc_stats.last_isr_time,
22807aa8 431 (s64)val1.tv_sec, val1.tv_nsec,
67125b02 432 (u64)stats->misc_stats.last_ack_time,
22807aa8 433 (s64)val2.tv_sec, val2.tv_nsec,
3567dca1
SK		 434 (u64)atomic64_read(&stats->misc_stats.max_isr_jiffies),
435 (u64)atomic64_read(&stats->misc_stats.max_isr_time_ms),
436 (u64)atomic64_read(&stats->misc_stats.corr_work_done),
67125b02
HP		 437 (u64)atomic64_read(&stats->misc_stats.isr_count),
438 (u64)atomic64_read(&stats->misc_stats.max_cq_entries),
439 (u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
440 (u64)atomic64_read(&stats->misc_stats.data_count_mismatch),
441 (u64)atomic64_read(&stats->misc_stats.fcpio_timeout),
442 (u64)atomic64_read(&stats->misc_stats.fcpio_aborted),
443 (u64)atomic64_read(&stats->misc_stats.sgl_invalid),
444 (u64)atomic64_read(
445 &stats->misc_stats.abts_cpwq_alloc_failures),
446 (u64)atomic64_read(
447 &stats->misc_stats.devrst_cpwq_alloc_failures),
448 (u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
449 (u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
39fcbbc0 450 (u64)atomic64_read(&stats->misc_stats.check_condition),
67125b02
HP		 451 (u64)atomic64_read(&stats->misc_stats.queue_fulls),
452 (u64)atomic64_read(&stats->misc_stats.rport_not_ready),
453 (u64)atomic64_read(&stats->misc_stats.frame_errors));
454
d948e638
SK		 455 len += snprintf(debug->debug_buffer + len, buf_size - len,
456 "Firmware reported port seed: %llu\n",
457 (u64)atomic64_read(
458 &stats->misc_stats.current_port_speed));
459
67125b02
HP		 460 return len;
461
462}
463
4d7007b4
HP		 464/*
465 * fnic_trace_buf_init - Initialize fnic trace buffer logging facility
466 *
467 * Description:
468 * Initialize trace buffer data structure by allocating required memory and
469 * setting page_offset information for every trace entry by adding trace entry
470 * length to previous page_offset value.
471 */
472int fnic_trace_buf_init(void)
473{
474 unsigned long fnic_buf_head;
475 int i;
476 int err = 0;
477
478 trace_max_pages = fnic_trace_max_pages;
479 fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/
480 FNIC_ENTRY_SIZE_BYTES;
481
e3f230c0 482 fnic_trace_buf_p = (unsigned long)vzalloc(trace_max_pages * PAGE_SIZE);
4d7007b4
HP		 483 if (!fnic_trace_buf_p) {
484 printk(KERN_ERR PFX "Failed to allocate memory "
485 "for fnic_trace_buf_p\n");
486 err = -ENOMEM;
487 goto err_fnic_trace_buf_init;
488 }
4d7007b4 489
42bc47b3
KC		 490 fnic_trace_entries.page_offset =
491 vmalloc(array_size(fnic_max_trace_entries,
492 sizeof(unsigned long)));
4d7007b4
HP		 493 if (!fnic_trace_entries.page_offset) {
494 printk(KERN_ERR PFX "Failed to allocate memory for"
495 " page_offset\n");
496 if (fnic_trace_buf_p) {
497 vfree((void *)fnic_trace_buf_p);
498 fnic_trace_buf_p = 0;
499 }
500 err = -ENOMEM;
501 goto err_fnic_trace_buf_init;
502 }
503 memset((void *)fnic_trace_entries.page_offset, 0,
504 (fnic_max_trace_entries * sizeof(unsigned long)));
505 fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
506 fnic_buf_head = fnic_trace_buf_p;
507
508 /*
509 * Set page_offset field of fnic_trace_entries struct by
510 * calculating memory location for every trace entry using
511 * length of each trace entry
512 */
513 for (i = 0; i < fnic_max_trace_entries; i++) {
514 fnic_trace_entries.page_offset[i] = fnic_buf_head;
515 fnic_buf_head += FNIC_ENTRY_SIZE_BYTES;
516 }
1dbaa379 517 fnic_trace_debugfs_init();
abb14148 518 pr_info("fnic: Successfully Initialized Trace Buffer\n");
4d7007b4 519 return err;
1dbaa379 520
4d7007b4
HP		 521err_fnic_trace_buf_init:
522 return err;
523}
524
525/*
526 * fnic_trace_free - Free memory of fnic trace data structures.
527 */
528void fnic_trace_free(void)
529{
530 fnic_tracing_enabled = 0;
531 fnic_trace_debugfs_terminate();
532 if (fnic_trace_entries.page_offset) {
533 vfree((void *)fnic_trace_entries.page_offset);
534 fnic_trace_entries.page_offset = NULL;
535 }
536 if (fnic_trace_buf_p) {
537 vfree((void *)fnic_trace_buf_p);
538 fnic_trace_buf_p = 0;
539 }
540 printk(KERN_INFO PFX "Successfully Freed Trace Buffer\n");
541}
abb14148
HS		 542
543/*
544 * fnic_fc_ctlr_trace_buf_init -
545 * Initialize trace buffer to log fnic control frames
546 * Description:
547 * Initialize trace buffer data structure by allocating
548 * required memory for trace data as well as for Indexes.
549 * Frame size is 256 bytes and
550 * memory is allocated for 1024 entries of 256 bytes.
551 * Page_offset(Index) is set to the address of trace entry
552 * and page_offset is initialized by adding frame size
553 * to the previous page_offset entry.
554 */
555
556int fnic_fc_trace_init(void)
557{
558 unsigned long fc_trace_buf_head;
559 int err = 0;
560 int i;
561
562 fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/
563 FC_TRC_SIZE_BYTES;
42bc47b3
KC		 564 fnic_fc_ctlr_trace_buf_p =
565 (unsigned long)vmalloc(array_size(PAGE_SIZE,
566 fnic_fc_trace_max_pages));
abb14148
HS		 567 if (!fnic_fc_ctlr_trace_buf_p) {
568 pr_err("fnic: Failed to allocate memory for "
569 "FC Control Trace Buf\n");
570 err = -ENOMEM;
571 goto err_fnic_fc_ctlr_trace_buf_init;
572 }
573
574 memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
575 fnic_fc_trace_max_pages * PAGE_SIZE);
576
577 /* Allocate memory for page offset */
42bc47b3
KC		 578 fc_trace_entries.page_offset =
579 vmalloc(array_size(fc_trace_max_entries,
580 sizeof(unsigned long)));
abb14148
HS		 581 if (!fc_trace_entries.page_offset) {
582 pr_err("fnic:Failed to allocate memory for page_offset\n");
583 if (fnic_fc_ctlr_trace_buf_p) {
584 pr_err("fnic: Freeing FC Control Trace Buf\n");
585 vfree((void *)fnic_fc_ctlr_trace_buf_p);
586 fnic_fc_ctlr_trace_buf_p = 0;
587 }
588 err = -ENOMEM;
589 goto err_fnic_fc_ctlr_trace_buf_init;
590 }
591 memset((void *)fc_trace_entries.page_offset, 0,
592 (fc_trace_max_entries * sizeof(unsigned long)));
593
594 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
595 fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p;
596
597 /*
598 * Set up fc_trace_entries.page_offset field with memory location
599 * for every trace entry
600 */
601 for (i = 0; i < fc_trace_max_entries; i++) {
602 fc_trace_entries.page_offset[i] = fc_trace_buf_head;
603 fc_trace_buf_head += FC_TRC_SIZE_BYTES;
604 }
1dbaa379 605 fnic_fc_trace_debugfs_init();
abb14148
HS		 606 pr_info("fnic: Successfully Initialized FC_CTLR Trace Buffer\n");
607 return err;
608
abb14148
HS		 609err_fnic_fc_ctlr_trace_buf_init:
610 return err;
611}
612
613/*
614 * Fnic_fc_ctlr_trace_free - Free memory of fnic_fc_ctlr trace data structures.
615 */
616void fnic_fc_trace_free(void)
617{
618 fnic_fc_tracing_enabled = 0;
619 fnic_fc_trace_debugfs_terminate();
620 if (fc_trace_entries.page_offset) {
621 vfree((void *)fc_trace_entries.page_offset);
622 fc_trace_entries.page_offset = NULL;
623 }
624 if (fnic_fc_ctlr_trace_buf_p) {
625 vfree((void *)fnic_fc_ctlr_trace_buf_p);
626 fnic_fc_ctlr_trace_buf_p = 0;
627 }
628 pr_info("fnic:Successfully FC_CTLR Freed Trace Buffer\n");
629}
630
631/*
632 * fnic_fc_ctlr_set_trace_data:
633 * Maintain rd & wr idx accordingly and set data
634 * Passed parameters:
635 * host_no: host number accociated with fnic
636 * frame_type: send_frame, rece_frame or link event
637 * fc_frame: pointer to fc_frame
638 * frame_len: Length of the fc_frame
639 * Description:
640 * This routine will get next available wr_idx and
641 * copy all passed trace data to the buffer pointed by wr_idx
642 * and increment wr_idx. It will also make sure that we dont
643 * overwrite the entry which we are reading and also
644 * wrap around if we reach the maximum entries.
645 * Returned Value:
646 * It will return 0 for success or -1 for failure
647 */
648int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
649 char *frame, u32 fc_trc_frame_len)
650{
651 unsigned long flags;
652 struct fc_trace_hdr *fc_buf;
653 unsigned long eth_fcoe_hdr_len;
654 char *fc_trace;
655
656 if (fnic_fc_tracing_enabled == 0)
657 return 0;
658
659 spin_lock_irqsave(&fnic_fc_trace_lock, flags);
660
661 if (fnic_fc_trace_cleared == 1) {
662 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
1a84db56 663 pr_info("fnic: Resetting the read idx\n");
abb14148
HS		 664 memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
665 fnic_fc_trace_max_pages * PAGE_SIZE);
666 fnic_fc_trace_cleared = 0;
667 }
668
669 fc_buf = (struct fc_trace_hdr *)
670 fc_trace_entries.page_offset[fc_trace_entries.wr_idx];
671
672 fc_trace_entries.wr_idx++;
673
674 if (fc_trace_entries.wr_idx >= fc_trace_max_entries)
675 fc_trace_entries.wr_idx = 0;
676
677 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
678 fc_trace_entries.rd_idx++;
679 if (fc_trace_entries.rd_idx >= fc_trace_max_entries)
680 fc_trace_entries.rd_idx = 0;
681 }
682
48c4676d 683 ktime_get_real_ts64(&fc_buf->time_stamp);
abb14148
HS		 684 fc_buf->host_no = host_no;
685 fc_buf->frame_type = frame_type;
686
687 fc_trace = (char *)FC_TRACE_ADDRESS(fc_buf);
688
689 /* During the receive path, we do not have eth hdr as well as fcoe hdr
690 * at trace entry point so we will stuff 0xff just to make it generic.
691 */
692 if (frame_type == FNIC_FC_RECV) {
693 eth_fcoe_hdr_len = sizeof(struct ethhdr) +
694 sizeof(struct fcoe_hdr);
abb14148
HS		 695 memset((char *)fc_trace, 0xff, eth_fcoe_hdr_len);
696 /* Copy the rest of data frame */
697 memcpy((char *)(fc_trace + eth_fcoe_hdr_len), (void *)frame,
698 min_t(u8, fc_trc_frame_len,
042b356a
HS		 699 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE
700 - eth_fcoe_hdr_len)));
abb14148
HS		 701 } else {
702 memcpy((char *)fc_trace, (void *)frame,
703 min_t(u8, fc_trc_frame_len,
704 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)));
705 }
706
707 /* Store the actual received length */
708 fc_buf->frame_len = fc_trc_frame_len;
709
710 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
711 return 0;
712}
713
714/*
715 * fnic_fc_ctlr_get_trace_data: Copy trace buffer to a memory file
716 * Passed parameter:
717 * @fnic_dbgfs_t: pointer to debugfs trace buffer
718 * rdata_flag: 1 => Unformated file
719 * 0 => formated file
720 * Description:
721 * This routine will copy the trace data to memory file with
722 * proper formatting and also copy to another memory
723 * file without formatting for further procesing.
724 * Retrun Value:
725 * Number of bytes that were dumped into fnic_dbgfs_t
726 */
727
728int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag)
729{
730 int rd_idx, wr_idx;
731 unsigned long flags;
732 int len = 0, j;
733 struct fc_trace_hdr *tdata;
734 char *fc_trace;
735
736 spin_lock_irqsave(&fnic_fc_trace_lock, flags);
737 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
738 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
739 pr_info("fnic: Buffer is empty\n");
740 return 0;
741 }
742 rd_idx = fc_trace_entries.rd_idx;
743 wr_idx = fc_trace_entries.wr_idx;
744 if (rdata_flag == 0) {
745 len += snprintf(fnic_dbgfs_prt->buffer + len,
746 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
747 "Time Stamp (UTC)\t\t"
748 "Host No: F Type: len: FCoE_FRAME:\n");
749 }
750
751 while (rd_idx != wr_idx) {
752 tdata = (struct fc_trace_hdr *)
753 fc_trace_entries.page_offset[rd_idx];
754 if (!tdata) {
755 pr_info("fnic: Rd data is NULL\n");
756 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
757 return 0;
758 }
759 if (rdata_flag == 0) {
760 copy_and_format_trace_data(tdata,
761 fnic_dbgfs_prt, &len, rdata_flag);
762 } else {
763 fc_trace = (char *)tdata;
764 for (j = 0; j < FC_TRC_SIZE_BYTES; j++) {
765 len += snprintf(fnic_dbgfs_prt->buffer + len,
766 (fnic_fc_trace_max_pages * PAGE_SIZE * 3)
767 - len, "%02x", fc_trace[j] & 0xff);
768 } /* for loop */
769 len += snprintf(fnic_dbgfs_prt->buffer + len,
770 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
771 "\n");
772 }
773 rd_idx++;
774 if (rd_idx > (fc_trace_max_entries - 1))
775 rd_idx = 0;
776 }
777
778 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
779 return len;
780}
781
782/*
783 * copy_and_format_trace_data: Copy formatted data to char * buffer
784 * Passed Parameter:
785 * @fc_trace_hdr_t: pointer to trace data
786 * @fnic_dbgfs_t: pointer to debugfs trace buffer
787 * @orig_len: pointer to len
788 * rdata_flag: 0 => Formated file, 1 => Unformated file
789 * Description:
790 * This routine will format and copy the passed trace data
791 * for formated file or unformated file accordingly.
792 */
793
794void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
795 fnic_dbgfs_t *fnic_dbgfs_prt, int *orig_len,
796 u8 rdata_flag)
797{
798 struct tm tm;
799 int j, i = 1, len;
800 char *fc_trace, *fmt;
801 int ethhdr_len = sizeof(struct ethhdr) - 1;
802 int fcoehdr_len = sizeof(struct fcoe_hdr);
803 int fchdr_len = sizeof(struct fc_frame_header);
804 int max_size = fnic_fc_trace_max_pages * PAGE_SIZE * 3;
805
806 tdata->frame_type = tdata->frame_type & 0x7F;
807
808 len = *orig_len;
809
48c4676d 810 time64_to_tm(tdata->time_stamp.tv_sec, 0, &tm);
abb14148
HS		 811
812 fmt = "%02d:%02d:%04ld %02d:%02d:%02d.%09lu ns%8x %c%8x\t";
813 len += snprintf(fnic_dbgfs_prt->buffer + len,
86001f24 814 max_size - len,
abb14148
HS		 815 fmt,
816 tm.tm_mon + 1, tm.tm_mday, tm.tm_year + 1900,
817 tm.tm_hour, tm.tm_min, tm.tm_sec,
818 tdata->time_stamp.tv_nsec, tdata->host_no,
819 tdata->frame_type, tdata->frame_len);
820
821 fc_trace = (char *)FC_TRACE_ADDRESS(tdata);
822
823 for (j = 0; j < min_t(u8, tdata->frame_len,
824 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)); j++) {
825 if (tdata->frame_type == FNIC_FC_LE) {
826 len += snprintf(fnic_dbgfs_prt->buffer + len,
827 max_size - len, "%c", fc_trace[j]);
828 } else {
829 len += snprintf(fnic_dbgfs_prt->buffer + len,
830 max_size - len, "%02x", fc_trace[j] & 0xff);
831 len += snprintf(fnic_dbgfs_prt->buffer + len,
832 max_size - len, " ");
833 if (j == ethhdr_len ||
834 j == ethhdr_len + fcoehdr_len ||
835 j == ethhdr_len + fcoehdr_len + fchdr_len ||
836 (i > 3 && j%fchdr_len == 0)) {
837 len += snprintf(fnic_dbgfs_prt->buffer
86001f24 838 + len, max_size - len,
abb14148
HS		 839 "\n\t\t\t\t\t\t\t\t");
840 i++;
841 }
842 } /* end of else*/
843 } /* End of for loop*/
844 len += snprintf(fnic_dbgfs_prt->buffer + len,
845 max_size - len, "\n");
846 *orig_len = len;
847}
Linux 6.x block layer and io_uring tree(s)