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 #include <linux/vmalloc.h> 12 13 #include "qedf.h" 14 #include "qedf_dbg.h" 15 16 static struct dentry *qedf_dbg_root; 17 18 /* 19 * qedf_dbg_host_init - setup the debugfs file for the pf 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 */ 48 void 49 qedf_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 driver 60 */ 61 void 62 qedf_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 entries 72 */ 73 void 74 qedf_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 84 const 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 96 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads); 97 98 static ssize_t 99 qedf_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 } 134 135 static ssize_t 136 qedf_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 } 144 145 static ssize_t 146 qedf_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 } 159 160 static ssize_t 161 qedf_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 else 185 qedf_debug = val; 186 187 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val); 188 return count; 189 } 190 191 static ssize_t 192 qedf_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 } 208 209 static ssize_t 210 qedf_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 } 240 241 static int 242 qedf_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); 283 284 out: 285 return 0; 286 } 287 288 static int 289 qedf_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 */ 299 static 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 */ 313 static 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 }; 324 325 static int 326 qedf_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 } 374 375 static int 376 qedf_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 } 384 385 static ssize_t 386 qedf_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 } 396 397 static ssize_t 398 qedf_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 } 418 419 static int 420 qedf_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); 463 out: 464 return 0; 465 } 466 467 static int 468 qedf_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 } 476 477 const 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 */ 490 void qedf_dbg_host_init(struct qedf_dbg_ctx *); 491 void qedf_dbg_host_exit(struct qedf_dbg_ctx *); 492 void qedf_dbg_init(char *); 493 void qedf_dbg_exit(void); 494 #endif /* CONFIG_DEBUG_FS */ 495