1 /* 2 * QLogic FCoE Offload Driver 3 * Copyright (c) 2016-2018 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 31 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Creating debugfs host node\n"); 32 /* create pf dir */ 33 sprintf(host_dirname, "host%u", qedf->host_no); 34 qedf->bdf_dentry = debugfs_create_dir(host_dirname, qedf_dbg_root); 35 36 /* create debugfs files */ 37 while (dops) { 38 if (!(dops->name)) 39 break; 40 41 debugfs_create_file(dops->name, 0600, qedf->bdf_dentry, qedf, 42 fops); 43 dops++; 44 fops++; 45 } 46 } 47 48 /** 49 * qedf_dbg_host_exit - clear out the pf's debugfs entries 50 * @pf: the pf that is stopping 51 **/ 52 void 53 qedf_dbg_host_exit(struct qedf_dbg_ctx *qedf) 54 { 55 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Destroying debugfs host " 56 "entry\n"); 57 /* remove debugfs entries of this PF */ 58 debugfs_remove_recursive(qedf->bdf_dentry); 59 qedf->bdf_dentry = NULL; 60 } 61 62 /** 63 * qedf_dbg_init - start up debugfs for the driver 64 **/ 65 void 66 qedf_dbg_init(char *drv_name) 67 { 68 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Creating debugfs root node\n"); 69 70 /* create qed dir in root of debugfs. NULL means debugfs root */ 71 qedf_dbg_root = debugfs_create_dir(drv_name, NULL); 72 } 73 74 /** 75 * qedf_dbg_exit - clean out the driver's debugfs entries 76 **/ 77 void 78 qedf_dbg_exit(void) 79 { 80 QEDF_INFO(NULL, QEDF_LOG_DEBUGFS, "Destroying debugfs root " 81 "entry\n"); 82 83 /* remove qed dir in root of debugfs */ 84 debugfs_remove_recursive(qedf_dbg_root); 85 qedf_dbg_root = NULL; 86 } 87 88 const struct qedf_debugfs_ops qedf_debugfs_ops[] = { 89 { "fp_int", NULL }, 90 { "io_trace", NULL }, 91 { "debug", NULL }, 92 { "stop_io_on_error", NULL}, 93 { "driver_stats", NULL}, 94 { "clear_stats", NULL}, 95 { "offload_stats", NULL}, 96 /* This must be last */ 97 { NULL, NULL } 98 }; 99 100 DECLARE_PER_CPU(struct qedf_percpu_iothread_s, qedf_percpu_iothreads); 101 102 static ssize_t 103 qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count, 104 loff_t *ppos) 105 { 106 size_t cnt = 0; 107 int id; 108 struct qedf_fastpath *fp = NULL; 109 struct qedf_dbg_ctx *qedf_dbg = 110 (struct qedf_dbg_ctx *)filp->private_data; 111 struct qedf_ctx *qedf = container_of(qedf_dbg, 112 struct qedf_ctx, dbg_ctx); 113 114 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 115 116 cnt = sprintf(buffer, "\nFastpath I/O completions\n\n"); 117 118 for (id = 0; id < qedf->num_queues; id++) { 119 fp = &(qedf->fp_array[id]); 120 if (fp->sb_id == QEDF_SB_ID_NULL) 121 continue; 122 cnt += sprintf((buffer + cnt), "#%d: %lu\n", id, 123 fp->completions); 124 } 125 126 cnt = min_t(int, count, cnt - *ppos); 127 *ppos += cnt; 128 return cnt; 129 } 130 131 static ssize_t 132 qedf_dbg_fp_int_cmd_write(struct file *filp, const char __user *buffer, 133 size_t count, loff_t *ppos) 134 { 135 if (!count || *ppos) 136 return 0; 137 138 return count; 139 } 140 141 static ssize_t 142 qedf_dbg_debug_cmd_read(struct file *filp, char __user *buffer, size_t count, 143 loff_t *ppos) 144 { 145 int cnt; 146 struct qedf_dbg_ctx *qedf = 147 (struct qedf_dbg_ctx *)filp->private_data; 148 149 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "entered\n"); 150 cnt = sprintf(buffer, "debug mask = 0x%x\n", qedf_debug); 151 152 cnt = min_t(int, count, cnt - *ppos); 153 *ppos += cnt; 154 return cnt; 155 } 156 157 static ssize_t 158 qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer, 159 size_t count, loff_t *ppos) 160 { 161 uint32_t val; 162 void *kern_buf; 163 int rval; 164 struct qedf_dbg_ctx *qedf = 165 (struct qedf_dbg_ctx *)filp->private_data; 166 167 if (!count || *ppos) 168 return 0; 169 170 kern_buf = memdup_user(buffer, count); 171 if (IS_ERR(kern_buf)) 172 return PTR_ERR(kern_buf); 173 174 rval = kstrtouint(kern_buf, 10, &val); 175 kfree(kern_buf); 176 if (rval) 177 return rval; 178 179 if (val == 1) 180 qedf_debug = QEDF_DEFAULT_LOG_MASK; 181 else 182 qedf_debug = val; 183 184 QEDF_INFO(qedf, QEDF_LOG_DEBUGFS, "Setting debug=0x%x.\n", val); 185 return count; 186 } 187 188 static ssize_t 189 qedf_dbg_stop_io_on_error_cmd_read(struct file *filp, char __user *buffer, 190 size_t count, loff_t *ppos) 191 { 192 int cnt; 193 struct qedf_dbg_ctx *qedf_dbg = 194 (struct qedf_dbg_ctx *)filp->private_data; 195 struct qedf_ctx *qedf = container_of(qedf_dbg, 196 struct qedf_ctx, dbg_ctx); 197 198 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 199 cnt = sprintf(buffer, "%s\n", 200 qedf->stop_io_on_error ? "true" : "false"); 201 202 cnt = min_t(int, count, cnt - *ppos); 203 *ppos += cnt; 204 return cnt; 205 } 206 207 static ssize_t 208 qedf_dbg_stop_io_on_error_cmd_write(struct file *filp, 209 const char __user *buffer, size_t count, 210 loff_t *ppos) 211 { 212 void *kern_buf; 213 struct qedf_dbg_ctx *qedf_dbg = 214 (struct qedf_dbg_ctx *)filp->private_data; 215 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 216 dbg_ctx); 217 218 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 219 220 if (!count || *ppos) 221 return 0; 222 223 kern_buf = memdup_user(buffer, 6); 224 if (IS_ERR(kern_buf)) 225 return PTR_ERR(kern_buf); 226 227 if (strncmp(kern_buf, "false", 5) == 0) 228 qedf->stop_io_on_error = false; 229 else if (strncmp(kern_buf, "true", 4) == 0) 230 qedf->stop_io_on_error = true; 231 else if (strncmp(kern_buf, "now", 3) == 0) 232 /* Trigger from user to stop all I/O on this host */ 233 set_bit(QEDF_DBG_STOP_IO, &qedf->flags); 234 235 kfree(kern_buf); 236 return count; 237 } 238 239 static int 240 qedf_io_trace_show(struct seq_file *s, void *unused) 241 { 242 int i, idx = 0; 243 struct qedf_ctx *qedf = s->private; 244 struct qedf_dbg_ctx *qedf_dbg = &qedf->dbg_ctx; 245 struct qedf_io_log *io_log; 246 unsigned long flags; 247 248 if (!qedf_io_tracing) { 249 seq_puts(s, "I/O tracing not enabled.\n"); 250 goto out; 251 } 252 253 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n"); 254 255 spin_lock_irqsave(&qedf->io_trace_lock, flags); 256 idx = qedf->io_trace_idx; 257 for (i = 0; i < QEDF_IO_TRACE_SIZE; i++) { 258 io_log = &qedf->io_trace_buf[idx]; 259 seq_printf(s, "%d:", io_log->direction); 260 seq_printf(s, "0x%x:", io_log->task_id); 261 seq_printf(s, "0x%06x:", io_log->port_id); 262 seq_printf(s, "%d:", io_log->lun); 263 seq_printf(s, "0x%02x:", io_log->op); 264 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0], 265 io_log->lba[1], io_log->lba[2], io_log->lba[3]); 266 seq_printf(s, "%d:", io_log->bufflen); 267 seq_printf(s, "%d:", io_log->sg_count); 268 seq_printf(s, "0x%08x:", io_log->result); 269 seq_printf(s, "%lu:", io_log->jiffies); 270 seq_printf(s, "%d:", io_log->refcount); 271 seq_printf(s, "%d:", io_log->req_cpu); 272 seq_printf(s, "%d:", io_log->int_cpu); 273 seq_printf(s, "%d:", io_log->rsp_cpu); 274 seq_printf(s, "%d\n", io_log->sge_type); 275 276 idx++; 277 if (idx == QEDF_IO_TRACE_SIZE) 278 idx = 0; 279 } 280 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 281 282 out: 283 return 0; 284 } 285 286 static int 287 qedf_dbg_io_trace_open(struct inode *inode, struct file *file) 288 { 289 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 290 struct qedf_ctx *qedf = container_of(qedf_dbg, 291 struct qedf_ctx, dbg_ctx); 292 293 return single_open(file, qedf_io_trace_show, qedf); 294 } 295 296 static int 297 qedf_driver_stats_show(struct seq_file *s, void *unused) 298 { 299 struct qedf_ctx *qedf = s->private; 300 struct qedf_rport *fcport; 301 struct fc_rport_priv *rdata; 302 303 seq_printf(s, "cmg_mgr free io_reqs: %d\n", 304 atomic_read(&qedf->cmd_mgr->free_list_cnt)); 305 seq_printf(s, "slow SGEs: %d\n", qedf->slow_sge_ios); 306 seq_printf(s, "single SGEs: %d\n", qedf->single_sge_ios); 307 seq_printf(s, "fast SGEs: %d\n\n", qedf->fast_sge_ios); 308 309 seq_puts(s, "Offloaded ports:\n\n"); 310 311 rcu_read_lock(); 312 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) { 313 rdata = fcport->rdata; 314 if (rdata == NULL) 315 continue; 316 seq_printf(s, "%06x: free_sqes: %d, num_active_ios: %d\n", 317 rdata->ids.port_id, atomic_read(&fcport->free_sqes), 318 atomic_read(&fcport->num_active_ios)); 319 } 320 rcu_read_unlock(); 321 322 return 0; 323 } 324 325 static int 326 qedf_dbg_driver_stats_open(struct inode *inode, struct file *file) 327 { 328 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 329 struct qedf_ctx *qedf = container_of(qedf_dbg, 330 struct qedf_ctx, dbg_ctx); 331 332 return single_open(file, qedf_driver_stats_show, qedf); 333 } 334 335 static ssize_t 336 qedf_dbg_clear_stats_cmd_read(struct file *filp, char __user *buffer, 337 size_t count, loff_t *ppos) 338 { 339 int cnt = 0; 340 341 /* Essentially a read stub */ 342 cnt = min_t(int, count, cnt - *ppos); 343 *ppos += cnt; 344 return cnt; 345 } 346 347 static ssize_t 348 qedf_dbg_clear_stats_cmd_write(struct file *filp, 349 const char __user *buffer, size_t count, 350 loff_t *ppos) 351 { 352 struct qedf_dbg_ctx *qedf_dbg = 353 (struct qedf_dbg_ctx *)filp->private_data; 354 struct qedf_ctx *qedf = container_of(qedf_dbg, struct qedf_ctx, 355 dbg_ctx); 356 357 QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "Clearing stat counters.\n"); 358 359 if (!count || *ppos) 360 return 0; 361 362 /* Clear stat counters exposed by 'stats' node */ 363 qedf->slow_sge_ios = 0; 364 qedf->single_sge_ios = 0; 365 qedf->fast_sge_ios = 0; 366 367 return count; 368 } 369 370 static int 371 qedf_offload_stats_show(struct seq_file *s, void *unused) 372 { 373 struct qedf_ctx *qedf = s->private; 374 struct qed_fcoe_stats *fw_fcoe_stats; 375 376 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL); 377 if (!fw_fcoe_stats) { 378 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for " 379 "fw_fcoe_stats.\n"); 380 goto out; 381 } 382 383 /* Query firmware for offload stats */ 384 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats); 385 386 seq_printf(s, "fcoe_rx_byte_cnt=%llu\n" 387 "fcoe_rx_data_pkt_cnt=%llu\n" 388 "fcoe_rx_xfer_pkt_cnt=%llu\n" 389 "fcoe_rx_other_pkt_cnt=%llu\n" 390 "fcoe_silent_drop_pkt_cmdq_full_cnt=%u\n" 391 "fcoe_silent_drop_pkt_crc_error_cnt=%u\n" 392 "fcoe_silent_drop_pkt_task_invalid_cnt=%u\n" 393 "fcoe_silent_drop_total_pkt_cnt=%u\n" 394 "fcoe_silent_drop_pkt_rq_full_cnt=%u\n" 395 "fcoe_tx_byte_cnt=%llu\n" 396 "fcoe_tx_data_pkt_cnt=%llu\n" 397 "fcoe_tx_xfer_pkt_cnt=%llu\n" 398 "fcoe_tx_other_pkt_cnt=%llu\n", 399 fw_fcoe_stats->fcoe_rx_byte_cnt, 400 fw_fcoe_stats->fcoe_rx_data_pkt_cnt, 401 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt, 402 fw_fcoe_stats->fcoe_rx_other_pkt_cnt, 403 fw_fcoe_stats->fcoe_silent_drop_pkt_cmdq_full_cnt, 404 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt, 405 fw_fcoe_stats->fcoe_silent_drop_pkt_task_invalid_cnt, 406 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt, 407 fw_fcoe_stats->fcoe_silent_drop_pkt_rq_full_cnt, 408 fw_fcoe_stats->fcoe_tx_byte_cnt, 409 fw_fcoe_stats->fcoe_tx_data_pkt_cnt, 410 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt, 411 fw_fcoe_stats->fcoe_tx_other_pkt_cnt); 412 413 kfree(fw_fcoe_stats); 414 out: 415 return 0; 416 } 417 418 static int 419 qedf_dbg_offload_stats_open(struct inode *inode, struct file *file) 420 { 421 struct qedf_dbg_ctx *qedf_dbg = inode->i_private; 422 struct qedf_ctx *qedf = container_of(qedf_dbg, 423 struct qedf_ctx, dbg_ctx); 424 425 return single_open(file, qedf_offload_stats_show, qedf); 426 } 427 428 const struct file_operations qedf_dbg_fops[] = { 429 qedf_dbg_fileops(qedf, fp_int), 430 qedf_dbg_fileops_seq(qedf, io_trace), 431 qedf_dbg_fileops(qedf, debug), 432 qedf_dbg_fileops(qedf, stop_io_on_error), 433 qedf_dbg_fileops_seq(qedf, driver_stats), 434 qedf_dbg_fileops(qedf, clear_stats), 435 qedf_dbg_fileops_seq(qedf, offload_stats), 436 /* This must be last */ 437 { }, 438 }; 439 440 #else /* CONFIG_DEBUG_FS */ 441 void qedf_dbg_host_init(struct qedf_dbg_ctx *); 442 void qedf_dbg_host_exit(struct qedf_dbg_ctx *); 443 void qedf_dbg_init(char *); 444 void qedf_dbg_exit(void); 445 #endif /* CONFIG_DEBUG_FS */ 446