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1// SPDX-License-Identifier: GPL-2.0-only2// Copyright 2014 Cisco Systems, Inc. All rights reserved.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 logging12 *13 * Description:14 * When Debugfs is configured this routine sets up fnic debugfs15 * filesystem. If not already created. this routine will crate the16 * fnic directory and statistics directory for trace buffer and17 * stats logging18 */19void snic_debugfs_init(void)20{21 snic_glob->trc_root = debugfs_create_dir("snic", NULL);22 23 snic_glob->stats_root = debugfs_create_dir("statistics",24 snic_glob->trc_root);25}26 27/*28 * snic_debugfs_term - Tear down debugfs intrastructure29 *30 * Description:31 * When Debufs is configured this routine removes debugfs file system32 * elements that are specific to snic33 */34void35snic_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 file46 */47static int48snic_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 file58 * @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_stats65 * and stores into local @buf. It will start reading file @ppos and66 * 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 */71static ssize_t72snic_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 file88 * @filp: The file pointer to write from89 * @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 and95 * resets cumulative stats of snic.96 *97 * Returns:98 * This function returns the amount of data that was written.99 */100static ssize_t101snic_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 IOs130 * and IO Completions stats. Skip incrementing No IO Compls131 * for pending active IOs after reset_stats132 */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 153static int154snic_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 */164static int165snic_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;169 struct timespec64 last_isr_tms, last_ack_tms;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"233 "Abort IO NOT Found : %lld\n"234 "Abort Queuing Failed : %lld\n",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),239 (u64) atomic64_read(&stats->abts.io_not_found),240 (u64) atomic64_read(&stats->abts.q_fail));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");280 281 jiffies_to_timespec64(stats->misc.last_isr_time, &last_isr_tms);282 jiffies_to_timespec64(stats->misc.last_ack_time, &last_ack_tms);283 284 seq_printf(sfp,285 "Last ISR Time : %llu (%8llu.%09lu)\n"286 "Last Ack Time : %llu (%8llu.%09lu)\n"287 "Ack ISRs : %llu\n"288 "IO Cmpl ISRs : %llu\n"289 "Err Notify ISRs : %llu\n"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"297 "Queue Ramp Up : %lld\n"298 "Queue Ramp Down : %lld\n"299 "Queue Last Queue Depth : %lld\n"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,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),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),315 (u64) atomic64_read(&stats->misc.qsz_rampup),316 (u64) atomic64_read(&stats->misc.qsz_rampdown),317 (u64) atomic64_read(&stats->misc.last_qsz),318 (u64) atomic64_read(&stats->misc.tgt_not_rdy));319 320 return 0;321}322 323DEFINE_SHOW_ATTRIBUTE(snic_stats);324 325static 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 file335 * per snic336 *337 * Description:338 * When debugfs is cofigured this routine sets up the stats file per snic339 * It will create file stats and reset_stats under statistics/host# directory340 * to log per snic stats341 */342void snic_stats_debugfs_init(struct snic *snic)343{344 char name[16];345 346 snprintf(name, sizeof(name), "host%d", snic->shost->host_no);347 348 snic->stats_host = debugfs_create_dir(name, snic_glob->stats_root);349 350 snic->stats_file = debugfs_create_file("stats", S_IFREG|S_IRUGO,351 snic->stats_host, snic,352 &snic_stats_fops);353 354 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}359 360/*361 * snic_stats_debugfs_remove - Tear down debugfs infrastructure of stats362 *363 * Description:364 * When Debufs is configured this routine removes debugfs file system365 * elements that are specific to to snic stats366 */367void368snic_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 */381static void *382snic_trc_seq_start(struct seq_file *sfp, loff_t *pos)383{384 return &snic_glob->trc;385}386 387static void *388snic_trc_seq_next(struct seq_file *sfp, void *data, loff_t *pos)389{390 return NULL;391}392 393static void394snic_trc_seq_stop(struct seq_file *sfp, void *data)395{396}397 398#define SNIC_TRC_PBLEN 256399static int400snic_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 410static const struct seq_operations snic_trc_sops = {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 417DEFINE_SEQ_ATTRIBUTE(snic_trc);418 419#define TRC_ENABLE_FILE "tracing_enable"420#define TRC_FILE "trace"421/*422 * snic_trc_debugfs_init : creates trace/tracing_enable files for trace423 * under debugfs424 */425void snic_trc_debugfs_init(void)426{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);432}433 434/*435 * snic_trc_debugfs_term : cleans up the files created for trace under debugfs436 */437void438snic_trc_debugfs_term(void)439{440 debugfs_lookup_and_remove(TRC_FILE, snic_glob->trc_root);441 debugfs_lookup_and_remove(TRC_ENABLE_FILE, snic_glob->trc_root);442}443