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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * QLogic FCoE Offload Driver4 * Copyright (c) 2016-2018 QLogic Corporation5 */6#ifdef CONFIG_DEBUG_FS7 8#include <linux/uaccess.h>9#include <linux/debugfs.h>10#include <linux/module.h>11#include <linux/vmalloc.h>12 13#include "qedf.h"14#include "qedf_dbg.h"15 16static struct dentry *qedf_dbg_root;17 18/*19 * qedf_dbg_host_init - setup the debugfs file for the pf20 */21void22qedf_dbg_host_init(struct qedf_dbg_ctx *qedf,23 const struct qedf_debugfs_ops *dops,24 const struct file_operations *fops)25{26 char host_dirname[32];27 28 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n");29 /* create pf dir */30 sprintf(host_dirname, "host%u", qedf->host_no);31 qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root);32 33 /* create debugfs files */34 while (dops) {35 if (!(dops->name))36 break;37 38 debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf,39 fops);40 dops++;41 fops++;42 }43}44 45/*46 * qedf_dbg_host_exit - clear out the pf's debugfs entries47 */48void49qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf_dbg)50{51 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Destroying debugfs host "52 "entry\n");53 /* remove debugfs entries of this PF */54 debugfs_remove_recursive(qedf_dbg->bdf_dentry);55 qedf_dbg->bdf_dentry = NULL;56}57 58/*59 * qedf_dbg_init - start up debugfs for the driver60 */61void62qedf_dbg_init(char *drv_name)63{64 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n");65 66 /* create qed dir in root of debugfs. NULL means debugfs root */67 qedf_dbg_root = debugfs_create_dir(drv_name, NULL);68}69 70/*71 * qedf_dbg_exit - clean out the driver's debugfs entries72 */73void74qedf_dbg_exit(void)75{76 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root "77 "entry\n");78 79 /* remove qed dir in root of debugfs */80 debugfs_remove_recursive(qedf_dbg_root);81 qedf_dbg_root = NULL;82}83 84const struct qedf_debugfs_ops qedf_debugfs_ops[] = {85 { "fp_int", NULL },86 { "io_trace", NULL },87 { "debug", NULL },88 { "stop_io_on_error", NULL},89 { "driver_stats", NULL},90 { "clear_stats", NULL},91 { "offload_stats", NULL},92 /* This must be last */93 { NULL, NULL }94};95 96DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads);97 98static ssize_t99qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,100 loff_t *ppos)101{102 ssize_t ret;103 size_t cnt = 0;104 char *cbuf;105 int id;106 struct qedf_fastpath *fp = NULL;107 struct qedf_dbg_ctx *qedf_dbg =108 (struct qedf_dbg_ctx *)filp->private_data;109 struct qedf_ctx *qedf = container_of(qedf_dbg,110 struct qedf_ctx, dbg_ctx);111 112 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");113 114 cbuf = vmalloc(QEDF_DEBUGFS_LOG_LEN);115 if (!cbuf)116 return 0;117 118 cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt, "\nFastpath I/O completions\n\n");119 120 for (id = 0; id < qedf->num_queues; id++) {121 fp = &(qedf->fp_array[id]);122 if (fp->sb_id == QEDF_SB_ID_NULL)123 continue;124 cnt += scnprintf(cbuf + cnt, QEDF_DEBUGFS_LOG_LEN - cnt,125 "#%d: %lu\n", id, fp->completions);126 }127 128 ret = simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);129 130 vfree(cbuf);131 132 return ret;133}134 135static ssize_t136qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer,137 size_t count, loff_t *ppos)138{139 if (!count || *ppos)140 return 0;141 142 return count;143}144 145static ssize_t146qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count,147 loff_t *ppos)148{149 int cnt;150 char cbuf[32];151 struct qedf_dbg_ctx *qedf_dbg =152 (struct qedf_dbg_ctx *)filp->private_data;153 154 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n", qedf_debug);155 cnt = scnprintf(cbuf, sizeof(cbuf), "debug mask = 0x%x\n", qedf_debug);156 157 return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);158}159 160static ssize_t161qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,162 size_t count, loff_t *ppos)163{164 uint32_t val;165 void *kern_buf;166 int rval;167 struct qedf_dbg_ctx *qedf_dbg =168 (struct qedf_dbg_ctx *)filp->private_data;169 170 if (!count || *ppos)171 return 0;172 173 kern_buf = memdup_user_nul(buffer, count);174 if (IS_ERR(kern_buf))175 return PTR_ERR(kern_buf);176 177 rval = kstrtouint(kern_buf, 10, &val);178 kfree(kern_buf);179 if (rval)180 return rval;181 182 if (val == 1)183 qedf_debug = QEDF_DEFAULT_LOG_MASK;184 else185 qedf_debug = val;186 187 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val);188 return count;189}190 191static ssize_t192qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer,193 size_t count, loff_t *ppos)194{195 int cnt;196 char cbuf[7];197 struct qedf_dbg_ctx *qedf_dbg =198 (struct qedf_dbg_ctx *)filp->private_data;199 struct qedf_ctx *qedf = container_of(qedf_dbg,200 struct qedf_ctx, dbg_ctx);201 202 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");203 cnt = scnprintf(cbuf, sizeof(cbuf), "%s\n",204 qedf->stop_io_on_error ? "true" : "false");205 206 return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt);207}208 209static ssize_t210qedf_dbg_stop_io_on_error_cmd_write(struct file *filp,211 const char __user *buffer, size_t count,212 loff_t *ppos)213{214 void *kern_buf;215 struct qedf_dbg_ctx *qedf_dbg =216 (struct qedf_dbg_ctx *)filp->private_data;217 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,218 dbg_ctx);219 220 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");221 222 if (!count || *ppos)223 return 0;224 225 kern_buf = memdup_user(buffer, 6);226 if (IS_ERR(kern_buf))227 return PTR_ERR(kern_buf);228 229 if (strncmp(kern_buf, "false", 5) == 0)230 qedf->stop_io_on_error = false;231 else if (strncmp(kern_buf, "true", 4) == 0)232 qedf->stop_io_on_error = true;233 else if (strncmp(kern_buf, "now", 3) == 0)234 /* Trigger from user to stop all I/O on this host */235 set_bit(QEDF_DBG_STOP_IO, &qedf->flags);236 237 kfree(kern_buf);238 return count;239}240 241static int242qedf_io_trace_show(struct seq_file *s, void *unused)243{244 int i, idx = 0;245 struct qedf_ctx *qedf = s->private;246 struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx;247 struct qedf_io_log *io_log;248 unsigned long flags;249 250 if (!qedf_io_tracing) {251 seq_puts(s, "I/O tracing not enabled.\n");252 goto out;253 }254 255 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");256 257 spin_lock_irqsave(&qedf->io_trace_lock, flags);258 idx = qedf->io_trace_idx;259 for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) {260 io_log = &qedf->io_trace_buf[idx];261 seq_printf(s, "%d:", io_log->direction);262 seq_printf(s, "0x%x:", io_log->task_id);263 seq_printf(s, "0x%06x:", io_log->port_id);264 seq_printf(s, "%d:", io_log->lun);265 seq_printf(s, "0x%02x:", io_log->op);266 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],267 io_log->lba[1], io_log->lba[2], io_log->lba[3]);268 seq_printf(s, "%d:", io_log->bufflen);269 seq_printf(s, "%d:", io_log->sg_count);270 seq_printf(s, "0x%08x:", io_log->result);271 seq_printf(s, "%lu:", io_log->jiffies);272 seq_printf(s, "%d:", io_log->refcount);273 seq_printf(s, "%d:", io_log->req_cpu);274 seq_printf(s, "%d:", io_log->int_cpu);275 seq_printf(s, "%d:", io_log->rsp_cpu);276 seq_printf(s, "%d\n", io_log->sge_type);277 278 idx++;279 if (idx == QEDF_IO_TRACE_SIZE)280 idx = 0;281 }282 spin_unlock_irqrestore(&qedf->io_trace_lock, flags);283 284out:285 return 0;286}287 288static int289qedf_dbg_io_trace_open(struct inode *inode, struct file *file)290{291 struct qedf_dbg_ctx *qedf_dbg = inode->i_private;292 struct qedf_ctx *qedf = container_of(qedf_dbg,293 struct qedf_ctx, dbg_ctx);294 295 return single_open(file, qedf_io_trace_show, qedf);296}297 298/* Based on fip_state enum from libfcoe.h */299static char *fip_state_names[] = {300 "FIP_ST_DISABLED",301 "FIP_ST_LINK_WAIT",302 "FIP_ST_AUTO",303 "FIP_ST_NON_FIP",304 "FIP_ST_ENABLED",305 "FIP_ST_VNMP_START",306 "FIP_ST_VNMP_PROBE1",307 "FIP_ST_VNMP_PROBE2",308 "FIP_ST_VNMP_CLAIM",309 "FIP_ST_VNMP_UP",310};311 312/* Based on fc_rport_state enum from libfc.h */313static char *fc_rport_state_names[] = {314 "RPORT_ST_INIT",315 "RPORT_ST_FLOGI",316 "RPORT_ST_PLOGI_WAIT",317 "RPORT_ST_PLOGI",318 "RPORT_ST_PRLI",319 "RPORT_ST_RTV",320 "RPORT_ST_READY",321 "RPORT_ST_ADISC",322 "RPORT_ST_DELETE",323};324 325static int326qedf_driver_stats_show(struct seq_file *s, void *unused)327{328 struct qedf_ctx *qedf = s->private;329 struct qedf_rport *fcport;330 struct fc_rport_priv *rdata;331 332 seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n",333 qedf->wwnn, qedf->wwpn);334 seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id);335 seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ?336 "Up" : "Down");337 seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ?338 "Up" : "Down");339 seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]);340 seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff);341 seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio);342 if (qedf->ctlr.sel_fcf) {343 seq_printf(s, "FCF WWPN: %016llx\n",344 qedf->ctlr.sel_fcf->switch_name);345 seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac);346 } else {347 seq_puts(s, "FCF not selected\n");348 }349 350 seq_puts(s, "\nSGE stats:\n\n");351 seq_printf(s, "cmg_mgr free io_reqs: %d\n",352 atomic_read(&qedf->cmd_mgr->free_list_cnt));353 seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios);354 seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios);355 356 seq_puts(s, "Offloaded ports:\n\n");357 358 rcu_read_lock();359 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {360 rdata = fcport->rdata;361 if (rdata == NULL)362 continue;363 seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n",364 rdata->rport->node_name, rdata->rport->port_name,365 rdata->ids.port_id,366 fc_rport_state_names[rdata->rp_state],367 atomic_read(&fcport->free_sqes),368 atomic_read(&fcport->num_active_ios));369 }370 rcu_read_unlock();371 372 return 0;373}374 375static int376qedf_dbg_driver_stats_open(struct inode *inode, struct file *file)377{378 struct qedf_dbg_ctx *qedf_dbg = inode->i_private;379 struct qedf_ctx *qedf = container_of(qedf_dbg,380 struct qedf_ctx, dbg_ctx);381 382 return single_open(file, qedf_driver_stats_show, qedf);383}384 385static ssize_t386qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer,387 size_t count, loff_t *ppos)388{389 int cnt = 0;390 391 /* Essentially a read stub */392 cnt = min_t(int, count, cnt - *ppos);393 *ppos += cnt;394 return cnt;395}396 397static ssize_t398qedf_dbg_clear_stats_cmd_write(struct file *filp,399 const char __user *buffer, size_t count,400 loff_t *ppos)401{402 struct qedf_dbg_ctx *qedf_dbg =403 (struct qedf_dbg_ctx *)filp->private_data;404 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx,405 dbg_ctx);406 407 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n");408 409 if (!count || *ppos)410 return 0;411 412 /* Clear stat counters exposed by 'stats' node */413 qedf->slow_sge_ios = 0;414 qedf->fast_sge_ios = 0;415 416 return count;417}418 419static int420qedf_offload_stats_show(struct seq_file *s, void *unused)421{422 struct qedf_ctx *qedf = s->private;423 struct qed_fcoe_stats *fw_fcoe_stats;424 425 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);426 if (!fw_fcoe_stats) {427 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "428 "fw_fcoe_stats.\n");429 goto out;430 }431 432 /* Query firmware for offload stats */433 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);434 435 seq_printf(s, "fcoe_rx_byte_cnt=%llu\n"436 "fcoe_rx_data_pkt_cnt=%llu\n"437 "fcoe_rx_xfer_pkt_cnt=%llu\n"438 "fcoe_rx_other_pkt_cnt=%llu\n"439 "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n"440 "fcoe_silent_drop_pkt_crc_error_cnt=%u\n"441 "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n"442 "fcoe_silent_drop_total_pkt_cnt=%u\n"443 "fcoe_silent_drop_pkt_rq_full_cnt=%u\n"444 "fcoe_tx_byte_cnt=%llu\n"445 "fcoe_tx_data_pkt_cnt=%llu\n"446 "fcoe_tx_xfer_pkt_cnt=%llu\n"447 "fcoe_tx_other_pkt_cnt=%llu\n",448 fw_fcoe_stats->fcoe_rx_byte_cnt,449 fw_fcoe_stats->fcoe_rx_data_pkt_cnt,450 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt,451 fw_fcoe_stats->fcoe_rx_other_pkt_cnt,452 fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt,453 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt,454 fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt,455 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt,456 fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt,457 fw_fcoe_stats->fcoe_tx_byte_cnt,458 fw_fcoe_stats->fcoe_tx_data_pkt_cnt,459 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt,460 fw_fcoe_stats->fcoe_tx_other_pkt_cnt);461 462 kfree(fw_fcoe_stats);463out:464 return 0;465}466 467static int468qedf_dbg_offload_stats_open(struct inode *inode, struct file *file)469{470 struct qedf_dbg_ctx *qedf_dbg = inode->i_private;471 struct qedf_ctx *qedf = container_of(qedf_dbg,472 struct qedf_ctx, dbg_ctx);473 474 return single_open(file, qedf_offload_stats_show, qedf);475}476 477const struct file_operations qedf_dbg_fops[] = {478 qedf_dbg_fileops(qedf, fp_int),479 qedf_dbg_fileops_seq(qedf, io_trace),480 qedf_dbg_fileops(qedf, debug),481 qedf_dbg_fileops(qedf, stop_io_on_error),482 qedf_dbg_fileops_seq(qedf, driver_stats),483 qedf_dbg_fileops(qedf, clear_stats),484 qedf_dbg_fileops_seq(qedf, offload_stats),485 /* This must be last */486 { },487};488 489#else /* CONFIG_DEBUG_FS */490void qedf_dbg_host_init(struct qedf_dbg_ctx *);491void qedf_dbg_host_exit(struct qedf_dbg_ctx *);492void qedf_dbg_init(char *);493void qedf_dbg_exit(void);494#endif /* CONFIG_DEBUG_FS */495