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 */ 20 void 21 qedf_dbg_host_init(struct qedf_dbg_ctx *qedf, 22 const struct qedf_debugfs_ops *dops, 23 const struct file_operations *fops) 24 { 25 char host_dirname[32]; 26 27 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n"); 28 /* create pf dir */ 29 sprintf(host_dirname, "host%u", qedf->host_no); 30 qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root); 31 32 /* create debugfs files */ 33 while (dops) { 34 if (!(dops->name)) 35 break; 36 37 debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf, 38 fops); 39 dops++; 40 fops++; 41 } 42 } 43 44 /* 45 * qedf_dbg_host_exit - clear out the pf's debugfs entries 46 */ 47 void 48 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf_dbg) 49 { 50 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Destroying debugfs host " 51 "entry\n"); 52 /* remove debugfs entries of this PF */ 53 debugfs_remove_recursive(qedf_dbg->bdf_dentry); 54 qedf_dbg->bdf_dentry = NULL; 55 } 56 57 /* 58 * qedf_dbg_init - start up debugfs for the driver 59 */ 60 void 61 qedf_dbg_init(char *drv_name) 62 { 63 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n"); 64 65 /* create qed dir in root of debugfs. NULL means debugfs root */ 66 qedf_dbg_root = debugfs_create_dir(drv_name, NULL); 67 } 68 69 /* 70 * qedf_dbg_exit - clean out the driver's debugfs entries 71 */ 72 void 73 qedf_dbg_exit(void) 74 { 75 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root " 76 "entry\n"); 77 78 /* remove qed dir in root of debugfs */ 79 debugfs_remove_recursive(qedf_dbg_root); 80 qedf_dbg_root = NULL; 81 } 82 83 const struct qedf_debugfs_ops qedf_debugfs_ops[] = { 84 { "fp_int", NULL }, 85 { "io_trace", NULL }, 86 { "debug", NULL }, 87 { "stop_io_on_error", NULL}, 88 { "driver_stats", NULL}, 89 { "clear_stats", NULL}, 90 { "offload_stats", NULL}, 91 /* This must be last */ 92 { NULL, NULL } 93 }; 94 95 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads); 96 97 static ssize_t 98 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count, 99 loff_t *ppos) 100 { 101 size_t cnt = 0; 102 int id; 103 struct qedf_fastpath *fp = NULL; 104 struct qedf_dbg_ctx *qedf_dbg = 105 (struct qedf_dbg_ctx *)filp->private_data; 106 struct qedf_ctx *qedf = container_of(qedf_dbg, 107 struct qedf_ctx, dbg_ctx); 108 109 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 110 111 cnt = sprintf(buffer, "\nFastpath I/O completions\n\n"); 112 113 for (id = 0; id < qedf->num_queues; id++) { 114 fp = &(qedf->fp_array[id]); 115 if (fp->sb_id == QEDF_SB_ID_NULL) 116 continue; 117 cnt += sprintf((buffer + cnt), "#%d: %lu\n", id, 118 fp->completions); 119 } 120 121 cnt = min_t(int, count, cnt - *ppos); 122 *ppos += cnt; 123 return cnt; 124 } 125 126 static ssize_t 127 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer, 128 size_t count, loff_t *ppos) 129 { 130 if (!count || *ppos) 131 return 0; 132 133 return count; 134 } 135 136 static ssize_t 137 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count, 138 loff_t *ppos) 139 { 140 int cnt; 141 struct qedf_dbg_ctx *qedf_dbg = 142 (struct qedf_dbg_ctx *)filp->private_data; 143 144 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "debug mask=0x%x\n", qedf_debug); 145 cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug); 146 147 cnt = min_t(int, count, cnt - *ppos); 148 *ppos += cnt; 149 return cnt; 150 } 151 152 static ssize_t 153 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer, 154 size_t count, loff_t *ppos) 155 { 156 uint32_t val; 157 void *kern_buf; 158 int rval; 159 struct qedf_dbg_ctx *qedf_dbg = 160 (struct qedf_dbg_ctx *)filp->private_data; 161 162 if (!count || *ppos) 163 return 0; 164 165 kern_buf = memdup_user(buffer, count); 166 if (IS_ERR(kern_buf)) 167 return PTR_ERR(kern_buf); 168 169 rval = kstrtouint(kern_buf, 10, &val); 170 kfree(kern_buf); 171 if (rval) 172 return rval; 173 174 if (val == 1) 175 qedf_debug = QEDF_DEFAULT_LOG_MASK; 176 else 177 qedf_debug = val; 178 179 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val); 180 return count; 181 } 182 183 static ssize_t 184 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer, 185 size_t count, loff_t *ppos) 186 { 187 int cnt; 188 char cbuf[7]; 189 struct qedf_dbg_ctx *qedf_dbg = 190 (struct qedf_dbg_ctx *)filp->private_data; 191 struct qedf_ctx *qedf = container_of(qedf_dbg, 192 struct qedf_ctx, dbg_ctx); 193 194 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 195 cnt = scnprintf(cbuf, sizeof(cbuf), "%s\n", 196 qedf->stop_io_on_error ? "true" : "false"); 197 198 return simple_read_from_buffer(buffer, count, ppos, cbuf, cnt); 199 } 200 201 static ssize_t 202 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp, 203 const char __user *buffer, size_t count, 204 loff_t *ppos) 205 { 206 void *kern_buf; 207 struct qedf_dbg_ctx *qedf_dbg = 208 (struct qedf_dbg_ctx *)filp->private_data; 209 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 210 dbg_ctx); 211 212 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 213 214 if (!count || *ppos) 215 return 0; 216 217 kern_buf = memdup_user(buffer, 6); 218 if (IS_ERR(kern_buf)) 219 return PTR_ERR(kern_buf); 220 221 if (strncmp(kern_buf, "false", 5) == 0) 222 qedf->stop_io_on_error = false; 223 else if (strncmp(kern_buf, "true", 4) == 0) 224 qedf->stop_io_on_error = true; 225 else if (strncmp(kern_buf, "now", 3) == 0) 226 /* Trigger from user to stop all I/O on this host */ 227 set_bit(QEDF_DBG_STOP_IO, &qedf->flags); 228 229 kfree(kern_buf); 230 return count; 231 } 232 233 static int 234 qedf_io_trace_show(struct seq_file *s, void *unused) 235 { 236 int i, idx = 0; 237 struct qedf_ctx *qedf = s->private; 238 struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx; 239 struct qedf_io_log *io_log; 240 unsigned long flags; 241 242 if (!qedf_io_tracing) { 243 seq_puts(s, "I/O tracing not enabled.\n"); 244 goto out; 245 } 246 247 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 248 249 spin_lock_irqsave(&qedf->io_trace_lock, flags); 250 idx = qedf->io_trace_idx; 251 for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) { 252 io_log = &qedf->io_trace_buf[idx]; 253 seq_printf(s, "%d:", io_log->direction); 254 seq_printf(s, "0x%x:", io_log->task_id); 255 seq_printf(s, "0x%06x:", io_log->port_id); 256 seq_printf(s, "%d:", io_log->lun); 257 seq_printf(s, "0x%02x:", io_log->op); 258 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0], 259 io_log->lba[1], io_log->lba[2], io_log->lba[3]); 260 seq_printf(s, "%d:", io_log->bufflen); 261 seq_printf(s, "%d:", io_log->sg_count); 262 seq_printf(s, "0x%08x:", io_log->result); 263 seq_printf(s, "%lu:", io_log->jiffies); 264 seq_printf(s, "%d:", io_log->refcount); 265 seq_printf(s, "%d:", io_log->req_cpu); 266 seq_printf(s, "%d:", io_log->int_cpu); 267 seq_printf(s, "%d:", io_log->rsp_cpu); 268 seq_printf(s, "%d\n", io_log->sge_type); 269 270 idx++; 271 if (idx == QEDF_IO_TRACE_SIZE) 272 idx = 0; 273 } 274 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 275 276 out: 277 return 0; 278 } 279 280 static int 281 qedf_dbg_io_trace_open(struct inode *inode, struct file *file) 282 { 283 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 284 struct qedf_ctx *qedf = container_of(qedf_dbg, 285 struct qedf_ctx, dbg_ctx); 286 287 return single_open(file, qedf_io_trace_show, qedf); 288 } 289 290 /* Based on fip_state enum from libfcoe.h */ 291 static char *fip_state_names[] = { 292 "FIP_ST_DISABLED", 293 "FIP_ST_LINK_WAIT", 294 "FIP_ST_AUTO", 295 "FIP_ST_NON_FIP", 296 "FIP_ST_ENABLED", 297 "FIP_ST_VNMP_START", 298 "FIP_ST_VNMP_PROBE1", 299 "FIP_ST_VNMP_PROBE2", 300 "FIP_ST_VNMP_CLAIM", 301 "FIP_ST_VNMP_UP", 302 }; 303 304 /* Based on fc_rport_state enum from libfc.h */ 305 static char *fc_rport_state_names[] = { 306 "RPORT_ST_INIT", 307 "RPORT_ST_FLOGI", 308 "RPORT_ST_PLOGI_WAIT", 309 "RPORT_ST_PLOGI", 310 "RPORT_ST_PRLI", 311 "RPORT_ST_RTV", 312 "RPORT_ST_READY", 313 "RPORT_ST_ADISC", 314 "RPORT_ST_DELETE", 315 }; 316 317 static int 318 qedf_driver_stats_show(struct seq_file *s, void *unused) 319 { 320 struct qedf_ctx *qedf = s->private; 321 struct qedf_rport *fcport; 322 struct fc_rport_priv *rdata; 323 324 seq_printf(s, "Host WWNN/WWPN: %016llx/%016llx\n", 325 qedf->wwnn, qedf->wwpn); 326 seq_printf(s, "Host NPortID: %06x\n", qedf->lport->port_id); 327 seq_printf(s, "Link State: %s\n", atomic_read(&qedf->link_state) ? 328 "Up" : "Down"); 329 seq_printf(s, "Logical Link State: %s\n", qedf->lport->link_up ? 330 "Up" : "Down"); 331 seq_printf(s, "FIP state: %s\n", fip_state_names[qedf->ctlr.state]); 332 seq_printf(s, "FIP VLAN ID: %d\n", qedf->vlan_id & 0xfff); 333 seq_printf(s, "FIP 802.1Q Priority: %d\n", qedf->prio); 334 if (qedf->ctlr.sel_fcf) { 335 seq_printf(s, "FCF WWPN: %016llx\n", 336 qedf->ctlr.sel_fcf->switch_name); 337 seq_printf(s, "FCF MAC: %pM\n", qedf->ctlr.sel_fcf->fcf_mac); 338 } else { 339 seq_puts(s, "FCF not selected\n"); 340 } 341 342 seq_puts(s, "\nSGE stats:\n\n"); 343 seq_printf(s, "cmg_mgr free io_reqs: %d\n", 344 atomic_read(&qedf->cmd_mgr->free_list_cnt)); 345 seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios); 346 seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios); 347 348 seq_puts(s, "Offloaded ports:\n\n"); 349 350 rcu_read_lock(); 351 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) { 352 rdata = fcport->rdata; 353 if (rdata == NULL) 354 continue; 355 seq_printf(s, "%016llx/%016llx/%06x: state=%s, free_sqes=%d, num_active_ios=%d\n", 356 rdata->rport->node_name, rdata->rport->port_name, 357 rdata->ids.port_id, 358 fc_rport_state_names[rdata->rp_state], 359 atomic_read(&fcport->free_sqes), 360 atomic_read(&fcport->num_active_ios)); 361 } 362 rcu_read_unlock(); 363 364 return 0; 365 } 366 367 static int 368 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file) 369 { 370 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 371 struct qedf_ctx *qedf = container_of(qedf_dbg, 372 struct qedf_ctx, dbg_ctx); 373 374 return single_open(file, qedf_driver_stats_show, qedf); 375 } 376 377 static ssize_t 378 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer, 379 size_t count, loff_t *ppos) 380 { 381 int cnt = 0; 382 383 /* Essentially a read stub */ 384 cnt = min_t(int, count, cnt - *ppos); 385 *ppos += cnt; 386 return cnt; 387 } 388 389 static ssize_t 390 qedf_dbg_clear_stats_cmd_write(struct file *filp, 391 const char __user *buffer, size_t count, 392 loff_t *ppos) 393 { 394 struct qedf_dbg_ctx *qedf_dbg = 395 (struct qedf_dbg_ctx *)filp->private_data; 396 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 397 dbg_ctx); 398 399 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n"); 400 401 if (!count || *ppos) 402 return 0; 403 404 /* Clear stat counters exposed by 'stats' node */ 405 qedf->slow_sge_ios = 0; 406 qedf->fast_sge_ios = 0; 407 408 return count; 409 } 410 411 static int 412 qedf_offload_stats_show(struct seq_file *s, void *unused) 413 { 414 struct qedf_ctx *qedf = s->private; 415 struct qed_fcoe_stats *fw_fcoe_stats; 416 417 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL); 418 if (!fw_fcoe_stats) { 419 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for " 420 "fw_fcoe_stats.\n"); 421 goto out; 422 } 423 424 /* Query firmware for offload stats */ 425 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats); 426 427 seq_printf(s, "fcoe_rx_byte_cnt=%llu\n" 428 "fcoe_rx_data_pkt_cnt=%llu\n" 429 "fcoe_rx_xfer_pkt_cnt=%llu\n" 430 "fcoe_rx_other_pkt_cnt=%llu\n" 431 "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n" 432 "fcoe_silent_drop_pkt_crc_error_cnt=%u\n" 433 "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n" 434 "fcoe_silent_drop_total_pkt_cnt=%u\n" 435 "fcoe_silent_drop_pkt_rq_full_cnt=%u\n" 436 "fcoe_tx_byte_cnt=%llu\n" 437 "fcoe_tx_data_pkt_cnt=%llu\n" 438 "fcoe_tx_xfer_pkt_cnt=%llu\n" 439 "fcoe_tx_other_pkt_cnt=%llu\n", 440 fw_fcoe_stats->fcoe_rx_byte_cnt, 441 fw_fcoe_stats->fcoe_rx_data_pkt_cnt, 442 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt, 443 fw_fcoe_stats->fcoe_rx_other_pkt_cnt, 444 fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt, 445 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt, 446 fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt, 447 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt, 448 fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt, 449 fw_fcoe_stats->fcoe_tx_byte_cnt, 450 fw_fcoe_stats->fcoe_tx_data_pkt_cnt, 451 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt, 452 fw_fcoe_stats->fcoe_tx_other_pkt_cnt); 453 454 kfree(fw_fcoe_stats); 455 out: 456 return 0; 457 } 458 459 static int 460 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file) 461 { 462 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 463 struct qedf_ctx *qedf = container_of(qedf_dbg, 464 struct qedf_ctx, dbg_ctx); 465 466 return single_open(file, qedf_offload_stats_show, qedf); 467 } 468 469 const struct file_operations qedf_dbg_fops[] = { 470 qedf_dbg_fileops(qedf, fp_int), 471 qedf_dbg_fileops_seq(qedf, io_trace), 472 qedf_dbg_fileops(qedf, debug), 473 qedf_dbg_fileops(qedf, stop_io_on_error), 474 qedf_dbg_fileops_seq(qedf, driver_stats), 475 qedf_dbg_fileops(qedf, clear_stats), 476 qedf_dbg_fileops_seq(qedf, offload_stats), 477 /* This must be last */ 478 { }, 479 }; 480 481 #else /* CONFIG_DEBUG_FS */ 482 void qedf_dbg_host_init(struct qedf_dbg_ctx *); 483 void qedf_dbg_host_exit(struct qedf_dbg_ctx *); 484 void qedf_dbg_init(char *); 485 void qedf_dbg_exit(void); 486 #endif /* CONFIG_DEBUG_FS */ 487