1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic FCoE Offload Driver 4 * Copyright (c) 2016-2018 QLogic Corporation 5 */ 6 #ifdef CONFIG_DEBUG_FS 7 8 #include <linux/uaccess.h> 9 #include <linux/debugfs.h> 10 #include <linux/module.h> 11 12 #include "qedf.h" 13 #include "qedf_dbg.h" 14 15 static struct dentry *qedf_dbg_root; 16 17 /** 18 * qedf_dbg_host_init - setup the debugfs file for the pf 19 * @pf: the pf that is starting up 20 **/ 21 void 22 qedf_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 entries 47 * @pf: the pf that is stopping 48 **/ 49 void 50 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf) 51 { 52 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host " 53 "entry\n"); 54 /* remove debugfs entries of this PF */ 55 debugfs_remove_recursive(qedf->bdf_dentry); 56 qedf->bdf_dentry = NULL; 57 } 58 59 /** 60 * qedf_dbg_init - start up debugfs for the driver 61 **/ 62 void 63 qedf_dbg_init(char *drv_name) 64 { 65 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n"); 66 67 /* create qed dir in root of debugfs. NULL means debugfs root */ 68 qedf_dbg_root = debugfs_create_dir(drv_name, NULL); 69 } 70 71 /** 72 * qedf_dbg_exit - clean out the driver's debugfs entries 73 **/ 74 void 75 qedf_dbg_exit(void) 76 { 77 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root " 78 "entry\n"); 79 80 /* remove qed dir in root of debugfs */ 81 debugfs_remove_recursive(qedf_dbg_root); 82 qedf_dbg_root = NULL; 83 } 84 85 const struct qedf_debugfs_ops qedf_debugfs_ops[] = { 86 { "fp_int", NULL }, 87 { "io_trace", NULL }, 88 { "debug", NULL }, 89 { "stop_io_on_error", NULL}, 90 { "driver_stats", NULL}, 91 { "clear_stats", NULL}, 92 { "offload_stats", NULL}, 93 /* This must be last */ 94 { NULL, NULL } 95 }; 96 97 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads); 98 99 static ssize_t 100 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count, 101 loff_t *ppos) 102 { 103 size_t cnt = 0; 104 int id; 105 struct qedf_fastpath *fp = NULL; 106 struct qedf_dbg_ctx *qedf_dbg = 107 (struct qedf_dbg_ctx *)filp->private_data; 108 struct qedf_ctx *qedf = container_of(qedf_dbg, 109 struct qedf_ctx, dbg_ctx); 110 111 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 112 113 cnt = sprintf(buffer, "\nFastpath I/O completions\n\n"); 114 115 for (id = 0; id < qedf->num_queues; id++) { 116 fp = &(qedf->fp_array[id]); 117 if (fp->sb_id == QEDF_SB_ID_NULL) 118 continue; 119 cnt += sprintf((buffer + cnt), "#%d: %lu\n", id, 120 fp->completions); 121 } 122 123 cnt = min_t(int, count, cnt - *ppos); 124 *ppos += cnt; 125 return cnt; 126 } 127 128 static ssize_t 129 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer, 130 size_t count, loff_t *ppos) 131 { 132 if (!count || *ppos) 133 return 0; 134 135 return count; 136 } 137 138 static ssize_t 139 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count, 140 loff_t *ppos) 141 { 142 int cnt; 143 struct qedf_dbg_ctx *qedf = 144 (struct qedf_dbg_ctx *)filp->private_data; 145 146 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n"); 147 cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug); 148 149 cnt = min_t(int, count, cnt - *ppos); 150 *ppos += cnt; 151 return cnt; 152 } 153 154 static ssize_t 155 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer, 156 size_t count, loff_t *ppos) 157 { 158 uint32_t val; 159 void *kern_buf; 160 int rval; 161 struct qedf_dbg_ctx *qedf = 162 (struct qedf_dbg_ctx *)filp->private_data; 163 164 if (!count || *ppos) 165 return 0; 166 167 kern_buf = memdup_user(buffer, count); 168 if (IS_ERR(kern_buf)) 169 return PTR_ERR(kern_buf); 170 171 rval = kstrtouint(kern_buf, 10, &val); 172 kfree(kern_buf); 173 if (rval) 174 return rval; 175 176 if (val == 1) 177 qedf_debug = QEDF_DEFAULT_LOG_MASK; 178 else 179 qedf_debug = val; 180 181 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val); 182 return count; 183 } 184 185 static ssize_t 186 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer, 187 size_t count, loff_t *ppos) 188 { 189 int cnt; 190 struct qedf_dbg_ctx *qedf_dbg = 191 (struct qedf_dbg_ctx *)filp->private_data; 192 struct qedf_ctx *qedf = container_of(qedf_dbg, 193 struct qedf_ctx, dbg_ctx); 194 195 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 196 cnt = sprintf(buffer, "%s\n", 197 qedf->stop_io_on_error ? "true" : "false"); 198 199 cnt = min_t(int, count, cnt - *ppos); 200 *ppos += cnt; 201 return cnt; 202 } 203 204 static ssize_t 205 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp, 206 const char __user *buffer, size_t count, 207 loff_t *ppos) 208 { 209 void *kern_buf; 210 struct qedf_dbg_ctx *qedf_dbg = 211 (struct qedf_dbg_ctx *)filp->private_data; 212 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 213 dbg_ctx); 214 215 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 216 217 if (!count || *ppos) 218 return 0; 219 220 kern_buf = memdup_user(buffer, 6); 221 if (IS_ERR(kern_buf)) 222 return PTR_ERR(kern_buf); 223 224 if (strncmp(kern_buf, "false", 5) == 0) 225 qedf->stop_io_on_error = false; 226 else if (strncmp(kern_buf, "true", 4) == 0) 227 qedf->stop_io_on_error = true; 228 else if (strncmp(kern_buf, "now", 3) == 0) 229 /* Trigger from user to stop all I/O on this host */ 230 set_bit(QEDF_DBG_STOP_IO, &qedf->flags); 231 232 kfree(kern_buf); 233 return count; 234 } 235 236 static int 237 qedf_io_trace_show(struct seq_file *s, void *unused) 238 { 239 int i, idx = 0; 240 struct qedf_ctx *qedf = s->private; 241 struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx; 242 struct qedf_io_log *io_log; 243 unsigned long flags; 244 245 if (!qedf_io_tracing) { 246 seq_puts(s, "I/O tracing not enabled.\n"); 247 goto out; 248 } 249 250 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 251 252 spin_lock_irqsave(&qedf->io_trace_lock, flags); 253 idx = qedf->io_trace_idx; 254 for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) { 255 io_log = &qedf->io_trace_buf[idx]; 256 seq_printf(s, "%d:", io_log->direction); 257 seq_printf(s, "0x%x:", io_log->task_id); 258 seq_printf(s, "0x%06x:", io_log->port_id); 259 seq_printf(s, "%d:", io_log->lun); 260 seq_printf(s, "0x%02x:", io_log->op); 261 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0], 262 io_log->lba[1], io_log->lba[2], io_log->lba[3]); 263 seq_printf(s, "%d:", io_log->bufflen); 264 seq_printf(s, "%d:", io_log->sg_count); 265 seq_printf(s, "0x%08x:", io_log->result); 266 seq_printf(s, "%lu:", io_log->jiffies); 267 seq_printf(s, "%d:", io_log->refcount); 268 seq_printf(s, "%d:", io_log->req_cpu); 269 seq_printf(s, "%d:", io_log->int_cpu); 270 seq_printf(s, "%d:", io_log->rsp_cpu); 271 seq_printf(s, "%d\n", io_log->sge_type); 272 273 idx++; 274 if (idx == QEDF_IO_TRACE_SIZE) 275 idx = 0; 276 } 277 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 278 279 out: 280 return 0; 281 } 282 283 static int 284 qedf_dbg_io_trace_open(struct inode *inode, struct file *file) 285 { 286 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 287 struct qedf_ctx *qedf = container_of(qedf_dbg, 288 struct qedf_ctx, dbg_ctx); 289 290 return single_open(file, qedf_io_trace_show, qedf); 291 } 292 293 /* Based on fip_state enum from libfcoe.h */ 294 static char *fip_state_names[] = { 295 "FIP_ST_DISABLED", 296 "FIP_ST_LINK_WAIT", 297 "FIP_ST_AUTO", 298 "FIP_ST_NON_FIP", 299 "FIP_ST_ENABLED", 300 "FIP_ST_VNMP_START", 301 "FIP_ST_VNMP_PROBE1", 302 "FIP_ST_VNMP_PROBE2", 303 "FIP_ST_VNMP_CLAIM", 304 "FIP_ST_VNMP_UP", 305 }; 306 307 /* Based on fc_rport_state enum from libfc.h */ 308 static char *fc_rport_state_names[] = { 309 "RPORT_ST_INIT", 310 "RPORT_ST_FLOGI", 311 "RPORT_ST_PLOGI_WAIT", 312 "RPORT_ST_PLOGI", 313 "RPORT_ST_PRLI", 314 "RPORT_ST_RTV", 315 "RPORT_ST_READY", 316 "RPORT_ST_ADISC", 317 "RPORT_ST_DELETE", 318 }; 319 320 static int 321 qedf_driver_stats_show(struct seq_file *s, void *unused) 322 { 323 struct qedf_ctx *qedf = s->private; 324 struct qedf_rport *fcport; 325 struct fc_rport_priv *rdata; 326 327 seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n", 328 qedf->wwnn, qedf->wwpn); 329 seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id); 330 seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ? 331 "Up" : "Down"); 332 seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ? 333 "Up" : "Down"); 334 seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]); 335 seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff); 336 seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio); 337 if (qedf->ctlr.sel_fcf) { 338 seq_printf(s, "FCF WWPN: %016llx\n", 339 qedf->ctlr.sel_fcf->switch_name); 340 seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac); 341 } else { 342 seq_puts(s, "FCF not selected\n"); 343 } 344 345 seq_puts(s, "\nSGE stats:\n\n"); 346 seq_printf(s, "cmg_mgr free io_reqs: %d\n", 347 atomic_read(&qedf->cmd_mgr->free_list_cnt)); 348 seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios); 349 seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios); 350 351 seq_puts(s, "Offloaded ports:\n\n"); 352 353 rcu_read_lock(); 354 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) { 355 rdata = fcport->rdata; 356 if (rdata == NULL) 357 continue; 358 seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n", 359 rdata->rport->node_name, rdata->rport->port_name, 360 rdata->ids.port_id, 361 fc_rport_state_names[rdata->rp_state], 362 atomic_read(&fcport->free_sqes), 363 atomic_read(&fcport->num_active_ios)); 364 } 365 rcu_read_unlock(); 366 367 return 0; 368 } 369 370 static int 371 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file) 372 { 373 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 374 struct qedf_ctx *qedf = container_of(qedf_dbg, 375 struct qedf_ctx, dbg_ctx); 376 377 return single_open(file, qedf_driver_stats_show, qedf); 378 } 379 380 static ssize_t 381 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer, 382 size_t count, loff_t *ppos) 383 { 384 int cnt = 0; 385 386 /* Essentially a read stub */ 387 cnt = min_t(int, count, cnt - *ppos); 388 *ppos += cnt; 389 return cnt; 390 } 391 392 static ssize_t 393 qedf_dbg_clear_stats_cmd_write(struct file *filp, 394 const char __user *buffer, size_t count, 395 loff_t *ppos) 396 { 397 struct qedf_dbg_ctx *qedf_dbg = 398 (struct qedf_dbg_ctx *)filp->private_data; 399 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 400 dbg_ctx); 401 402 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n"); 403 404 if (!count || *ppos) 405 return 0; 406 407 /* Clear stat counters exposed by 'stats' node */ 408 qedf->slow_sge_ios = 0; 409 qedf->fast_sge_ios = 0; 410 411 return count; 412 } 413 414 static int 415 qedf_offload_stats_show(struct seq_file *s, void *unused) 416 { 417 struct qedf_ctx *qedf = s->private; 418 struct qed_fcoe_stats *fw_fcoe_stats; 419 420 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL); 421 if (!fw_fcoe_stats) { 422 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for " 423 "fw_fcoe_stats.\n"); 424 goto out; 425 } 426 427 /* Query firmware for offload stats */ 428 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats); 429 430 seq_printf(s, "fcoe_rx_byte_cnt=%llu\n" 431 "fcoe_rx_data_pkt_cnt=%llu\n" 432 "fcoe_rx_xfer_pkt_cnt=%llu\n" 433 "fcoe_rx_other_pkt_cnt=%llu\n" 434 "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n" 435 "fcoe_silent_drop_pkt_crc_error_cnt=%u\n" 436 "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n" 437 "fcoe_silent_drop_total_pkt_cnt=%u\n" 438 "fcoe_silent_drop_pkt_rq_full_cnt=%u\n" 439 "fcoe_tx_byte_cnt=%llu\n" 440 "fcoe_tx_data_pkt_cnt=%llu\n" 441 "fcoe_tx_xfer_pkt_cnt=%llu\n" 442 "fcoe_tx_other_pkt_cnt=%llu\n", 443 fw_fcoe_stats->fcoe_rx_byte_cnt, 444 fw_fcoe_stats->fcoe_rx_data_pkt_cnt, 445 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt, 446 fw_fcoe_stats->fcoe_rx_other_pkt_cnt, 447 fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt, 448 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt, 449 fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt, 450 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt, 451 fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt, 452 fw_fcoe_stats->fcoe_tx_byte_cnt, 453 fw_fcoe_stats->fcoe_tx_data_pkt_cnt, 454 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt, 455 fw_fcoe_stats->fcoe_tx_other_pkt_cnt); 456 457 kfree(fw_fcoe_stats); 458 out: 459 return 0; 460 } 461 462 static int 463 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file) 464 { 465 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 466 struct qedf_ctx *qedf = container_of(qedf_dbg, 467 struct qedf_ctx, dbg_ctx); 468 469 return single_open(file, qedf_offload_stats_show, qedf); 470 } 471 472 const struct file_operations qedf_dbg_fops[] = { 473 qedf_dbg_fileops(qedf, fp_int), 474 qedf_dbg_fileops_seq(qedf, io_trace), 475 qedf_dbg_fileops(qedf, debug), 476 qedf_dbg_fileops(qedf, stop_io_on_error), 477 qedf_dbg_fileops_seq(qedf, driver_stats), 478 qedf_dbg_fileops(qedf, clear_stats), 479 qedf_dbg_fileops_seq(qedf, offload_stats), 480 /* This must be last */ 481 { }, 482 }; 483 484 #else /* CONFIG_DEBUG_FS */ 485 void qedf_dbg_host_init(struct qedf_dbg_ctx *); 486 void qedf_dbg_host_exit(struct qedf_dbg_ctx *); 487 void qedf_dbg_init(char *); 488 void qedf_dbg_exit(void); 489 #endif /* CONFIG_DEBUG_FS */ 490