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dfb99b05 TG |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | // Copyright 2014 Cisco Systems, Inc. All rights reserved. | |
c8806b6c NM |
3 | |
4 | #include <linux/module.h> | |
5 | #include <linux/errno.h> | |
6 | #include <linux/debugfs.h> | |
7 | ||
8 | #include "snic.h" | |
9 | ||
10 | /* | |
11 | * snic_debugfs_init - Initialize debugfs for snic debug logging | |
12 | * | |
13 | * Description: | |
14 | * When Debugfs is configured this routine sets up fnic debugfs | |
15 | * filesystem. If not already created. this routine will crate the | |
16 | * fnic directory and statistics directory for trace buffer and | |
17 | * stats logging | |
18 | */ | |
fd84ec20 | 19 | void snic_debugfs_init(void) |
c8806b6c | 20 | { |
fd84ec20 | 21 | snic_glob->trc_root = debugfs_create_dir("snic", NULL); |
c8806b6c | 22 | |
fd84ec20 GKH |
23 | snic_glob->stats_root = debugfs_create_dir("statistics", |
24 | snic_glob->trc_root); | |
25 | } | |
c8806b6c NM |
26 | |
27 | /* | |
28 | * snic_debugfs_term - Tear down debugfs intrastructure | |
29 | * | |
30 | * Description: | |
31 | * When Debufs is configured this routine removes debugfs file system | |
32 | * elements that are specific to snic | |
33 | */ | |
34 | void | |
35 | snic_debugfs_term(void) | |
36 | { | |
37 | debugfs_remove(snic_glob->stats_root); | |
38 | snic_glob->stats_root = NULL; | |
39 | ||
40 | debugfs_remove(snic_glob->trc_root); | |
41 | snic_glob->trc_root = NULL; | |
42 | } | |
43 | ||
44 | /* | |
45 | * snic_reset_stats_open - Open the reset_stats file | |
46 | */ | |
47 | static int | |
48 | snic_reset_stats_open(struct inode *inode, struct file *filp) | |
49 | { | |
50 | SNIC_BUG_ON(!inode->i_private); | |
51 | filp->private_data = inode->i_private; | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | /* | |
57 | * snic_reset_stats_read - Read a reset_stats debugfs file | |
58 | * @filp: The file pointer to read from. | |
59 | * @ubuf: The buffer tocopy the data to. | |
60 | * @cnt: The number of bytes to read. | |
61 | * @ppos: The position in the file to start reading frm. | |
62 | * | |
63 | * Description: | |
64 | * This routine reads value of variable reset_stats | |
65 | * and stores into local @buf. It will start reading file @ppos and | |
66 | * copy up to @cnt of data to @ubuf from @buf. | |
67 | * | |
68 | * Returns: | |
69 | * This function returns the amount of data that was read. | |
70 | */ | |
71 | static ssize_t | |
72 | snic_reset_stats_read(struct file *filp, | |
73 | char __user *ubuf, | |
74 | size_t cnt, | |
75 | loff_t *ppos) | |
76 | { | |
77 | struct snic *snic = (struct snic *) filp->private_data; | |
78 | char buf[64]; | |
79 | int len; | |
80 | ||
81 | len = sprintf(buf, "%u\n", snic->reset_stats); | |
82 | ||
83 | return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); | |
84 | } | |
85 | ||
86 | /* | |
87 | * snic_reset_stats_write - Write to reset_stats debugfs file | |
88 | * @filp: The file pointer to write from | |
89 | * @ubuf: The buffer to copy the data from. | |
90 | * @cnt: The number of bytes to write. | |
91 | * @ppos: The position in the file to start writing to. | |
92 | * | |
93 | * Description: | |
94 | * This routine writes data from user buffer @ubuf to buffer @buf and | |
95 | * resets cumulative stats of snic. | |
96 | * | |
97 | * Returns: | |
98 | * This function returns the amount of data that was written. | |
99 | */ | |
100 | static ssize_t | |
101 | snic_reset_stats_write(struct file *filp, | |
102 | const char __user *ubuf, | |
103 | size_t cnt, | |
104 | loff_t *ppos) | |
105 | { | |
106 | struct snic *snic = (struct snic *) filp->private_data; | |
107 | struct snic_stats *stats = &snic->s_stats; | |
108 | u64 *io_stats_p = (u64 *) &stats->io; | |
109 | u64 *fw_stats_p = (u64 *) &stats->fw; | |
110 | char buf[64]; | |
111 | unsigned long val; | |
112 | int ret; | |
113 | ||
114 | if (cnt >= sizeof(buf)) | |
115 | return -EINVAL; | |
116 | ||
117 | if (copy_from_user(&buf, ubuf, cnt)) | |
118 | return -EFAULT; | |
119 | ||
120 | buf[cnt] = '\0'; | |
121 | ||
122 | ret = kstrtoul(buf, 10, &val); | |
123 | if (ret < 0) | |
124 | return ret; | |
125 | ||
126 | snic->reset_stats = val; | |
127 | ||
128 | if (snic->reset_stats) { | |
129 | /* Skip variable is used to avoid descrepancies to Num IOs | |
130 | * and IO Completions stats. Skip incrementing No IO Compls | |
131 | * for pending active IOs after reset_stats | |
132 | */ | |
133 | atomic64_set(&snic->io_cmpl_skip, | |
134 | atomic64_read(&stats->io.active)); | |
135 | memset(&stats->abts, 0, sizeof(struct snic_abort_stats)); | |
136 | memset(&stats->reset, 0, sizeof(struct snic_reset_stats)); | |
137 | memset(&stats->misc, 0, sizeof(struct snic_misc_stats)); | |
138 | memset(io_stats_p+1, | |
139 | 0, | |
140 | sizeof(struct snic_io_stats) - sizeof(u64)); | |
141 | memset(fw_stats_p+1, | |
142 | 0, | |
143 | sizeof(struct snic_fw_stats) - sizeof(u64)); | |
144 | } | |
145 | ||
146 | (*ppos)++; | |
147 | ||
148 | SNIC_HOST_INFO(snic->shost, "Reset Op: Driver statistics.\n"); | |
149 | ||
150 | return cnt; | |
151 | } | |
152 | ||
153 | static int | |
154 | snic_reset_stats_release(struct inode *inode, struct file *filp) | |
155 | { | |
156 | filp->private_data = NULL; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | /* | |
162 | * snic_stats_show - Formats and prints per host specific driver stats. | |
163 | */ | |
164 | static int | |
165 | snic_stats_show(struct seq_file *sfp, void *data) | |
166 | { | |
167 | struct snic *snic = (struct snic *) sfp->private; | |
168 | struct snic_stats *stats = &snic->s_stats; | |
920447f1 | 169 | struct timespec64 last_isr_tms, last_ack_tms; |
c8806b6c NM |
170 | u64 maxio_tm; |
171 | int i; | |
172 | ||
173 | /* Dump IO Stats */ | |
174 | seq_printf(sfp, | |
175 | "------------------------------------------\n" | |
176 | "\t\t IO Statistics\n" | |
177 | "------------------------------------------\n"); | |
178 | ||
179 | maxio_tm = (u64) atomic64_read(&stats->io.max_time); | |
180 | seq_printf(sfp, | |
181 | "Active IOs : %lld\n" | |
182 | "Max Active IOs : %lld\n" | |
183 | "Total IOs : %lld\n" | |
184 | "IOs Completed : %lld\n" | |
185 | "IOs Failed : %lld\n" | |
186 | "IOs Not Found : %lld\n" | |
187 | "Memory Alloc Failures : %lld\n" | |
188 | "REQs Null : %lld\n" | |
189 | "SCSI Cmd Pointers Null : %lld\n" | |
190 | "Max SGL for any IO : %lld\n" | |
191 | "Max IO Size : %lld Sectors\n" | |
192 | "Max Queuing Time : %lld\n" | |
193 | "Max Completion Time : %lld\n" | |
194 | "Max IO Process Time(FW) : %lld (%u msec)\n", | |
195 | (u64) atomic64_read(&stats->io.active), | |
196 | (u64) atomic64_read(&stats->io.max_active), | |
197 | (u64) atomic64_read(&stats->io.num_ios), | |
198 | (u64) atomic64_read(&stats->io.compl), | |
199 | (u64) atomic64_read(&stats->io.fail), | |
200 | (u64) atomic64_read(&stats->io.io_not_found), | |
201 | (u64) atomic64_read(&stats->io.alloc_fail), | |
202 | (u64) atomic64_read(&stats->io.req_null), | |
203 | (u64) atomic64_read(&stats->io.sc_null), | |
204 | (u64) atomic64_read(&stats->io.max_sgl), | |
205 | (u64) atomic64_read(&stats->io.max_io_sz), | |
206 | (u64) atomic64_read(&stats->io.max_qtime), | |
207 | (u64) atomic64_read(&stats->io.max_cmpl_time), | |
208 | maxio_tm, | |
209 | jiffies_to_msecs(maxio_tm)); | |
210 | ||
211 | seq_puts(sfp, "\nSGL Counters\n"); | |
212 | ||
213 | for (i = 0; i < SNIC_MAX_SG_DESC_CNT; i++) { | |
214 | seq_printf(sfp, | |
215 | "%10lld ", | |
216 | (u64) atomic64_read(&stats->io.sgl_cnt[i])); | |
217 | ||
218 | if ((i + 1) % 8 == 0) | |
219 | seq_puts(sfp, "\n"); | |
220 | } | |
221 | ||
222 | /* Dump Abort Stats */ | |
223 | seq_printf(sfp, | |
224 | "\n-------------------------------------------\n" | |
225 | "\t\t Abort Statistics\n" | |
226 | "---------------------------------------------\n"); | |
227 | ||
228 | seq_printf(sfp, | |
229 | "Aborts : %lld\n" | |
230 | "Aborts Fail : %lld\n" | |
231 | "Aborts Driver Timeout : %lld\n" | |
232 | "Abort FW Timeout : %lld\n" | |
3f5c11a4 NM |
233 | "Abort IO NOT Found : %lld\n" |
234 | "Abort Queuing Failed : %lld\n", | |
c8806b6c NM |
235 | (u64) atomic64_read(&stats->abts.num), |
236 | (u64) atomic64_read(&stats->abts.fail), | |
237 | (u64) atomic64_read(&stats->abts.drv_tmo), | |
238 | (u64) atomic64_read(&stats->abts.fw_tmo), | |
3f5c11a4 NM |
239 | (u64) atomic64_read(&stats->abts.io_not_found), |
240 | (u64) atomic64_read(&stats->abts.q_fail)); | |
c8806b6c NM |
241 | |
242 | /* Dump Reset Stats */ | |
243 | seq_printf(sfp, | |
244 | "\n-------------------------------------------\n" | |
245 | "\t\t Reset Statistics\n" | |
246 | "---------------------------------------------\n"); | |
247 | ||
248 | seq_printf(sfp, | |
249 | "HBA Resets : %lld\n" | |
250 | "HBA Reset Cmpls : %lld\n" | |
251 | "HBA Reset Fail : %lld\n", | |
252 | (u64) atomic64_read(&stats->reset.hba_resets), | |
253 | (u64) atomic64_read(&stats->reset.hba_reset_cmpl), | |
254 | (u64) atomic64_read(&stats->reset.hba_reset_fail)); | |
255 | ||
256 | /* Dump Firmware Stats */ | |
257 | seq_printf(sfp, | |
258 | "\n-------------------------------------------\n" | |
259 | "\t\t Firmware Statistics\n" | |
260 | "---------------------------------------------\n"); | |
261 | ||
262 | seq_printf(sfp, | |
263 | "Active FW Requests : %lld\n" | |
264 | "Max FW Requests : %lld\n" | |
265 | "FW Out Of Resource Errs : %lld\n" | |
266 | "FW IO Errors : %lld\n" | |
267 | "FW SCSI Errors : %lld\n", | |
268 | (u64) atomic64_read(&stats->fw.actv_reqs), | |
269 | (u64) atomic64_read(&stats->fw.max_actv_reqs), | |
270 | (u64) atomic64_read(&stats->fw.out_of_res), | |
271 | (u64) atomic64_read(&stats->fw.io_errs), | |
272 | (u64) atomic64_read(&stats->fw.scsi_errs)); | |
273 | ||
274 | ||
275 | /* Dump Miscellenous Stats */ | |
276 | seq_printf(sfp, | |
277 | "\n---------------------------------------------\n" | |
278 | "\t\t Other Statistics\n" | |
279 | "\n---------------------------------------------\n"); | |
280 | ||
920447f1 AB |
281 | jiffies_to_timespec64(stats->misc.last_isr_time, &last_isr_tms); |
282 | jiffies_to_timespec64(stats->misc.last_ack_time, &last_ack_tms); | |
c8806b6c NM |
283 | |
284 | seq_printf(sfp, | |
920447f1 AB |
285 | "Last ISR Time : %llu (%8llu.%09lu)\n" |
286 | "Last Ack Time : %llu (%8llu.%09lu)\n" | |
3f5c11a4 NM |
287 | "Ack ISRs : %llu\n" |
288 | "IO Cmpl ISRs : %llu\n" | |
289 | "Err Notify ISRs : %llu\n" | |
c8806b6c NM |
290 | "Max CQ Entries : %lld\n" |
291 | "Data Count Mismatch : %lld\n" | |
292 | "IOs w/ Timeout Status : %lld\n" | |
293 | "IOs w/ Aborted Status : %lld\n" | |
294 | "IOs w/ SGL Invalid Stat : %lld\n" | |
295 | "WQ Desc Alloc Fail : %lld\n" | |
296 | "Queue Full : %lld\n" | |
3f5c11a4 NM |
297 | "Queue Ramp Up : %lld\n" |
298 | "Queue Ramp Down : %lld\n" | |
299 | "Queue Last Queue Depth : %lld\n" | |
c8806b6c NM |
300 | "Target Not Ready : %lld\n", |
301 | (u64) stats->misc.last_isr_time, | |
302 | last_isr_tms.tv_sec, last_isr_tms.tv_nsec, | |
303 | (u64)stats->misc.last_ack_time, | |
304 | last_ack_tms.tv_sec, last_ack_tms.tv_nsec, | |
3f5c11a4 NM |
305 | (u64) atomic64_read(&stats->misc.ack_isr_cnt), |
306 | (u64) atomic64_read(&stats->misc.cmpl_isr_cnt), | |
307 | (u64) atomic64_read(&stats->misc.errnotify_isr_cnt), | |
c8806b6c NM |
308 | (u64) atomic64_read(&stats->misc.max_cq_ents), |
309 | (u64) atomic64_read(&stats->misc.data_cnt_mismat), | |
310 | (u64) atomic64_read(&stats->misc.io_tmo), | |
311 | (u64) atomic64_read(&stats->misc.io_aborted), | |
312 | (u64) atomic64_read(&stats->misc.sgl_inval), | |
313 | (u64) atomic64_read(&stats->misc.wq_alloc_fail), | |
314 | (u64) atomic64_read(&stats->misc.qfull), | |
3f5c11a4 NM |
315 | (u64) atomic64_read(&stats->misc.qsz_rampup), |
316 | (u64) atomic64_read(&stats->misc.qsz_rampdown), | |
317 | (u64) atomic64_read(&stats->misc.last_qsz), | |
c8806b6c NM |
318 | (u64) atomic64_read(&stats->misc.tgt_not_rdy)); |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
54300bfd | 323 | DEFINE_SHOW_ATTRIBUTE(snic_stats); |
c8806b6c NM |
324 | |
325 | static const struct file_operations snic_reset_stats_fops = { | |
326 | .owner = THIS_MODULE, | |
327 | .open = snic_reset_stats_open, | |
328 | .read = snic_reset_stats_read, | |
329 | .write = snic_reset_stats_write, | |
330 | .release = snic_reset_stats_release, | |
331 | }; | |
332 | ||
333 | /* | |
334 | * snic_stats_init - Initialize stats struct and create stats file | |
335 | * per snic | |
336 | * | |
337 | * Description: | |
338 | * When debugfs is cofigured this routine sets up the stats file per snic | |
339 | * It will create file stats and reset_stats under statistics/host# directory | |
340 | * to log per snic stats | |
341 | */ | |
fd84ec20 | 342 | void snic_stats_debugfs_init(struct snic *snic) |
c8806b6c | 343 | { |
c8806b6c | 344 | char name[16]; |
c8806b6c NM |
345 | |
346 | snprintf(name, sizeof(name), "host%d", snic->shost->host_no); | |
c8806b6c | 347 | |
fd84ec20 | 348 | snic->stats_host = debugfs_create_dir(name, snic_glob->stats_root); |
c8806b6c | 349 | |
fd84ec20 GKH |
350 | snic->stats_file = debugfs_create_file("stats", S_IFREG|S_IRUGO, |
351 | snic->stats_host, snic, | |
352 | &snic_stats_fops); | |
c8806b6c | 353 | |
fd84ec20 GKH |
354 | snic->reset_stats_file = debugfs_create_file("reset_stats", |
355 | S_IFREG|S_IRUGO|S_IWUSR, | |
356 | snic->stats_host, snic, | |
357 | &snic_reset_stats_fops); | |
358 | } | |
c8806b6c NM |
359 | |
360 | /* | |
361 | * snic_stats_debugfs_remove - Tear down debugfs infrastructure of stats | |
362 | * | |
363 | * Description: | |
364 | * When Debufs is configured this routine removes debugfs file system | |
365 | * elements that are specific to to snic stats | |
366 | */ | |
367 | void | |
368 | snic_stats_debugfs_remove(struct snic *snic) | |
369 | { | |
370 | debugfs_remove(snic->stats_file); | |
371 | snic->stats_file = NULL; | |
372 | ||
373 | debugfs_remove(snic->reset_stats_file); | |
374 | snic->reset_stats_file = NULL; | |
375 | ||
376 | debugfs_remove(snic->stats_host); | |
377 | snic->stats_host = NULL; | |
378 | } | |
379 | ||
380 | /* Trace Facility related API */ | |
381 | static void * | |
382 | snic_trc_seq_start(struct seq_file *sfp, loff_t *pos) | |
383 | { | |
384 | return &snic_glob->trc; | |
385 | } | |
386 | ||
387 | static void * | |
388 | snic_trc_seq_next(struct seq_file *sfp, void *data, loff_t *pos) | |
389 | { | |
390 | return NULL; | |
391 | } | |
392 | ||
393 | static void | |
394 | snic_trc_seq_stop(struct seq_file *sfp, void *data) | |
395 | { | |
396 | } | |
397 | ||
398 | #define SNIC_TRC_PBLEN 256 | |
399 | static int | |
400 | snic_trc_seq_show(struct seq_file *sfp, void *data) | |
401 | { | |
402 | char buf[SNIC_TRC_PBLEN]; | |
403 | ||
404 | if (snic_get_trc_data(buf, SNIC_TRC_PBLEN) > 0) | |
405 | seq_printf(sfp, "%s\n", buf); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
936dc95d | 410 | static const struct seq_operations snic_trc_sops = { |
c8806b6c NM |
411 | .start = snic_trc_seq_start, |
412 | .next = snic_trc_seq_next, | |
413 | .stop = snic_trc_seq_stop, | |
414 | .show = snic_trc_seq_show, | |
415 | }; | |
416 | ||
936dc95d | 417 | DEFINE_SEQ_ATTRIBUTE(snic_trc); |
c8806b6c | 418 | |
1be4ec24 GKH |
419 | #define TRC_ENABLE_FILE "tracing_enable" |
420 | #define TRC_FILE "trace" | |
c8806b6c NM |
421 | /* |
422 | * snic_trc_debugfs_init : creates trace/tracing_enable files for trace | |
423 | * under debugfs | |
424 | */ | |
fd84ec20 | 425 | void snic_trc_debugfs_init(void) |
c8806b6c | 426 | { |
1be4ec24 GKH |
427 | debugfs_create_bool(TRC_ENABLE_FILE, S_IFREG | S_IRUGO | S_IWUSR, |
428 | snic_glob->trc_root, &snic_glob->trc.enable); | |
429 | ||
430 | debugfs_create_file(TRC_FILE, S_IFREG | S_IRUGO | S_IWUSR, | |
431 | snic_glob->trc_root, NULL, &snic_trc_fops); | |
fd84ec20 | 432 | } |
c8806b6c NM |
433 | |
434 | /* | |
435 | * snic_trc_debugfs_term : cleans up the files created for trace under debugfs | |
436 | */ | |
437 | void | |
438 | snic_trc_debugfs_term(void) | |
439 | { | |
ad0e4e2f GKH |
440 | debugfs_lookup_and_remove(TRC_FILE, snic_glob->trc_root); |
441 | debugfs_lookup_and_remove(TRC_ENABLE_FILE, snic_glob->trc_root); | |
c8806b6c | 442 | } |