1 /* 2 * QLogic FCoE Offload Driver 3 * Copyright (c) 2016-2017 QLogic Corporation 4 * 5 * This software is available under the terms of the GNU General Public License 6 * (GPL) Version 2, available from the file COPYING in the main directory of 7 * this source tree. 8 */ 9 #ifdef CONFIG_DEBUG_FS 10 11 #include <linux/uaccess.h> 12 #include <linux/debugfs.h> 13 #include <linux/module.h> 14 15 #include "qedf.h" 16 #include "qedf_dbg.h" 17 18 static struct dentry *qedf_dbg_root; 19 20 /** 21 * qedf_dbg_host_init - setup the debugfs file for the pf 22 * @pf: the pf that is starting up 23 **/ 24 void 25 qedf_dbg_host_init(struct qedf_dbg_ctx *qedf, 26 const struct qedf_debugfs_ops *dops, 27 const struct file_operations *fops) 28 { 29 char host_dirname[32]; 30 struct dentry *file_dentry = NULL; 31 32 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n"); 33 /* create pf dir */ 34 sprintf(host_dirname, "host%u", qedf->host_no); 35 qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root); 36 if (!qedf->bdf_dentry) 37 return; 38 39 /* create debugfs files */ 40 while (dops) { 41 if (!(dops->name)) 42 break; 43 44 file_dentry = debugfs_create_file(dops->name, 0600, 45 qedf->bdf_dentry, qedf, 46 fops); 47 if (!file_dentry) { 48 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, 49 "Debugfs entry %s creation failed\n", 50 dops->name); 51 debugfs_remove_recursive(qedf->bdf_dentry); 52 return; 53 } 54 dops++; 55 fops++; 56 } 57 } 58 59 /** 60 * qedf_dbg_host_exit - clear out the pf's debugfs entries 61 * @pf: the pf that is stopping 62 **/ 63 void 64 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf) 65 { 66 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host " 67 "entry\n"); 68 /* remove debugfs entries of this PF */ 69 debugfs_remove_recursive(qedf->bdf_dentry); 70 qedf->bdf_dentry = NULL; 71 } 72 73 /** 74 * qedf_dbg_init - start up debugfs for the driver 75 **/ 76 void 77 qedf_dbg_init(char *drv_name) 78 { 79 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n"); 80 81 /* create qed dir in root of debugfs. NULL means debugfs root */ 82 qedf_dbg_root = debugfs_create_dir(drv_name, NULL); 83 if (!qedf_dbg_root) 84 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Init of debugfs " 85 "failed\n"); 86 } 87 88 /** 89 * qedf_dbg_exit - clean out the driver's debugfs entries 90 **/ 91 void 92 qedf_dbg_exit(void) 93 { 94 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root " 95 "entry\n"); 96 97 /* remove qed dir in root of debugfs */ 98 debugfs_remove_recursive(qedf_dbg_root); 99 qedf_dbg_root = NULL; 100 } 101 102 const struct qedf_debugfs_ops qedf_debugfs_ops[] = { 103 { "fp_int", NULL }, 104 { "io_trace", NULL }, 105 { "debug", NULL }, 106 { "stop_io_on_error", NULL}, 107 { "driver_stats", NULL}, 108 { "clear_stats", NULL}, 109 { "offload_stats", NULL}, 110 /* This must be last */ 111 { NULL, NULL } 112 }; 113 114 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads); 115 116 static ssize_t 117 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count, 118 loff_t *ppos) 119 { 120 size_t cnt = 0; 121 int id; 122 struct qedf_fastpath *fp = NULL; 123 struct qedf_dbg_ctx *qedf_dbg = 124 (struct qedf_dbg_ctx *)filp->private_data; 125 struct qedf_ctx *qedf = container_of(qedf_dbg, 126 struct qedf_ctx, dbg_ctx); 127 128 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 129 130 cnt = sprintf(buffer, "\nFastpath I/O completions\n\n"); 131 132 for (id = 0; id < qedf->num_queues; id++) { 133 fp = &(qedf->fp_array[id]); 134 if (fp->sb_id == QEDF_SB_ID_NULL) 135 continue; 136 cnt += sprintf((buffer + cnt), "#%d: %lu\n", id, 137 fp->completions); 138 } 139 140 cnt = min_t(int, count, cnt - *ppos); 141 *ppos += cnt; 142 return cnt; 143 } 144 145 static ssize_t 146 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer, 147 size_t count, loff_t *ppos) 148 { 149 if (!count || *ppos) 150 return 0; 151 152 return count; 153 } 154 155 static ssize_t 156 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count, 157 loff_t *ppos) 158 { 159 int cnt; 160 struct qedf_dbg_ctx *qedf = 161 (struct qedf_dbg_ctx *)filp->private_data; 162 163 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n"); 164 cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug); 165 166 cnt = min_t(int, count, cnt - *ppos); 167 *ppos += cnt; 168 return cnt; 169 } 170 171 static ssize_t 172 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer, 173 size_t count, loff_t *ppos) 174 { 175 uint32_t val; 176 void *kern_buf; 177 int rval; 178 struct qedf_dbg_ctx *qedf = 179 (struct qedf_dbg_ctx *)filp->private_data; 180 181 if (!count || *ppos) 182 return 0; 183 184 kern_buf = memdup_user(buffer, count); 185 if (IS_ERR(kern_buf)) 186 return PTR_ERR(kern_buf); 187 188 rval = kstrtouint(kern_buf, 10, &val); 189 kfree(kern_buf); 190 if (rval) 191 return rval; 192 193 if (val == 1) 194 qedf_debug = QEDF_DEFAULT_LOG_MASK; 195 else 196 qedf_debug = val; 197 198 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val); 199 return count; 200 } 201 202 static ssize_t 203 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer, 204 size_t count, loff_t *ppos) 205 { 206 int cnt; 207 struct qedf_dbg_ctx *qedf_dbg = 208 (struct qedf_dbg_ctx *)filp->private_data; 209 struct qedf_ctx *qedf = container_of(qedf_dbg, 210 struct qedf_ctx, dbg_ctx); 211 212 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 213 cnt = sprintf(buffer, "%s\n", 214 qedf->stop_io_on_error ? "true" : "false"); 215 216 cnt = min_t(int, count, cnt - *ppos); 217 *ppos += cnt; 218 return cnt; 219 } 220 221 static ssize_t 222 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp, 223 const char __user *buffer, size_t count, 224 loff_t *ppos) 225 { 226 void *kern_buf; 227 struct qedf_dbg_ctx *qedf_dbg = 228 (struct qedf_dbg_ctx *)filp->private_data; 229 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 230 dbg_ctx); 231 232 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 233 234 if (!count || *ppos) 235 return 0; 236 237 kern_buf = memdup_user(buffer, 6); 238 if (IS_ERR(kern_buf)) 239 return PTR_ERR(kern_buf); 240 241 if (strncmp(kern_buf, "false", 5) == 0) 242 qedf->stop_io_on_error = false; 243 else if (strncmp(kern_buf, "true", 4) == 0) 244 qedf->stop_io_on_error = true; 245 else if (strncmp(kern_buf, "now", 3) == 0) 246 /* Trigger from user to stop all I/O on this host */ 247 set_bit(QEDF_DBG_STOP_IO, &qedf->flags); 248 249 kfree(kern_buf); 250 return count; 251 } 252 253 static int 254 qedf_io_trace_show(struct seq_file *s, void *unused) 255 { 256 int i, idx = 0; 257 struct qedf_ctx *qedf = s->private; 258 struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx; 259 struct qedf_io_log *io_log; 260 unsigned long flags; 261 262 if (!qedf_io_tracing) { 263 seq_puts(s, "I/O tracing not enabled.\n"); 264 goto out; 265 } 266 267 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 268 269 spin_lock_irqsave(&qedf->io_trace_lock, flags); 270 idx = qedf->io_trace_idx; 271 for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) { 272 io_log = &qedf->io_trace_buf[idx]; 273 seq_printf(s, "%d:", io_log->direction); 274 seq_printf(s, "0x%x:", io_log->task_id); 275 seq_printf(s, "0x%06x:", io_log->port_id); 276 seq_printf(s, "%d:", io_log->lun); 277 seq_printf(s, "0x%02x:", io_log->op); 278 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0], 279 io_log->lba[1], io_log->lba[2], io_log->lba[3]); 280 seq_printf(s, "%d:", io_log->bufflen); 281 seq_printf(s, "%d:", io_log->sg_count); 282 seq_printf(s, "0x%08x:", io_log->result); 283 seq_printf(s, "%lu:", io_log->jiffies); 284 seq_printf(s, "%d:", io_log->refcount); 285 seq_printf(s, "%d:", io_log->req_cpu); 286 seq_printf(s, "%d:", io_log->int_cpu); 287 seq_printf(s, "%d:", io_log->rsp_cpu); 288 seq_printf(s, "%d\n", io_log->sge_type); 289 290 idx++; 291 if (idx == QEDF_IO_TRACE_SIZE) 292 idx = 0; 293 } 294 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 295 296 out: 297 return 0; 298 } 299 300 static int 301 qedf_dbg_io_trace_open(struct inode *inode, struct file *file) 302 { 303 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 304 struct qedf_ctx *qedf = container_of(qedf_dbg, 305 struct qedf_ctx, dbg_ctx); 306 307 return single_open(file, qedf_io_trace_show, qedf); 308 } 309 310 static int 311 qedf_driver_stats_show(struct seq_file *s, void *unused) 312 { 313 struct qedf_ctx *qedf = s->private; 314 struct qedf_rport *fcport; 315 struct fc_rport_priv *rdata; 316 317 seq_printf(s, "cmg_mgr free io_reqs: %d\n", 318 atomic_read(&qedf->cmd_mgr->free_list_cnt)); 319 seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios); 320 seq_printf(s, "single SGEs: %d\n", qedf->single_sge_ios); 321 seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios); 322 323 seq_puts(s, "Offloaded ports:\n\n"); 324 325 rcu_read_lock(); 326 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) { 327 rdata = fcport->rdata; 328 if (rdata == NULL) 329 continue; 330 seq_printf(s, "%06x: free_sqes: %d, num_active_ios: %d\n", 331 rdata->ids.port_id, atomic_read(&fcport->free_sqes), 332 atomic_read(&fcport->num_active_ios)); 333 } 334 rcu_read_unlock(); 335 336 return 0; 337 } 338 339 static int 340 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file) 341 { 342 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 343 struct qedf_ctx *qedf = container_of(qedf_dbg, 344 struct qedf_ctx, dbg_ctx); 345 346 return single_open(file, qedf_driver_stats_show, qedf); 347 } 348 349 static ssize_t 350 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer, 351 size_t count, loff_t *ppos) 352 { 353 int cnt = 0; 354 355 /* Essentially a read stub */ 356 cnt = min_t(int, count, cnt - *ppos); 357 *ppos += cnt; 358 return cnt; 359 } 360 361 static ssize_t 362 qedf_dbg_clear_stats_cmd_write(struct file *filp, 363 const char __user *buffer, size_t count, 364 loff_t *ppos) 365 { 366 struct qedf_dbg_ctx *qedf_dbg = 367 (struct qedf_dbg_ctx *)filp->private_data; 368 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 369 dbg_ctx); 370 371 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n"); 372 373 if (!count || *ppos) 374 return 0; 375 376 /* Clear stat counters exposed by 'stats' node */ 377 qedf->slow_sge_ios = 0; 378 qedf->single_sge_ios = 0; 379 qedf->fast_sge_ios = 0; 380 381 return count; 382 } 383 384 static int 385 qedf_offload_stats_show(struct seq_file *s, void *unused) 386 { 387 struct qedf_ctx *qedf = s->private; 388 struct qed_fcoe_stats *fw_fcoe_stats; 389 390 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL); 391 if (!fw_fcoe_stats) { 392 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for " 393 "fw_fcoe_stats.\n"); 394 goto out; 395 } 396 397 /* Query firmware for offload stats */ 398 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats); 399 400 seq_printf(s, "fcoe_rx_byte_cnt=%llu\n" 401 "fcoe_rx_data_pkt_cnt=%llu\n" 402 "fcoe_rx_xfer_pkt_cnt=%llu\n" 403 "fcoe_rx_other_pkt_cnt=%llu\n" 404 "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n" 405 "fcoe_silent_drop_pkt_crc_error_cnt=%u\n" 406 "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n" 407 "fcoe_silent_drop_total_pkt_cnt=%u\n" 408 "fcoe_silent_drop_pkt_rq_full_cnt=%u\n" 409 "fcoe_tx_byte_cnt=%llu\n" 410 "fcoe_tx_data_pkt_cnt=%llu\n" 411 "fcoe_tx_xfer_pkt_cnt=%llu\n" 412 "fcoe_tx_other_pkt_cnt=%llu\n", 413 fw_fcoe_stats->fcoe_rx_byte_cnt, 414 fw_fcoe_stats->fcoe_rx_data_pkt_cnt, 415 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt, 416 fw_fcoe_stats->fcoe_rx_other_pkt_cnt, 417 fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt, 418 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt, 419 fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt, 420 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt, 421 fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt, 422 fw_fcoe_stats->fcoe_tx_byte_cnt, 423 fw_fcoe_stats->fcoe_tx_data_pkt_cnt, 424 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt, 425 fw_fcoe_stats->fcoe_tx_other_pkt_cnt); 426 427 kfree(fw_fcoe_stats); 428 out: 429 return 0; 430 } 431 432 static int 433 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file) 434 { 435 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 436 struct qedf_ctx *qedf = container_of(qedf_dbg, 437 struct qedf_ctx, dbg_ctx); 438 439 return single_open(file, qedf_offload_stats_show, qedf); 440 } 441 442 443 const struct file_operations qedf_dbg_fops[] = { 444 qedf_dbg_fileops(qedf, fp_int), 445 qedf_dbg_fileops_seq(qedf, io_trace), 446 qedf_dbg_fileops(qedf, debug), 447 qedf_dbg_fileops(qedf, stop_io_on_error), 448 qedf_dbg_fileops_seq(qedf, driver_stats), 449 qedf_dbg_fileops(qedf, clear_stats), 450 qedf_dbg_fileops_seq(qedf, offload_stats), 451 /* This must be last */ 452 { }, 453 }; 454 455 #else /* CONFIG_DEBUG_FS */ 456 void qedf_dbg_host_init(struct qedf_dbg_ctx *); 457 void qedf_dbg_host_exit(struct qedf_dbg_ctx *); 458 void qedf_dbg_init(char *); 459 void qedf_dbg_exit(void); 460 #endif /* CONFIG_DEBUG_FS */ 461