1// SPDX-License-Identifier: GPL-2.0 2#include <linux/dcache.h> 3#include <linux/debugfs.h> 4#include <linux/delay.h> 5#include <linux/hardirq.h> 6#include <linux/mm.h> 7#include <linux/string.h> 8#include <linux/slab.h> 9#include <linux/export.h> 10 11#include "decl.h" 12#include "cmd.h" 13#include "debugfs.h" 14 15static struct dentry *lbs_dir; 16static char *szStates[] = { 17 "Connected", 18 "Disconnected" 19}; 20 21#ifdef PROC_DEBUG 22static void lbs_debug_init(struct lbs_private *priv); 23#endif 24 25static ssize_t write_file_dummy(struct file *file, const char __user *buf, 26 size_t count, loff_t *ppos) 27{ 28 return -EINVAL; 29} 30 31static const size_t len = PAGE_SIZE; 32 33static ssize_t lbs_dev_info(struct file *file, char __user *userbuf, 34 size_t count, loff_t *ppos) 35{ 36 struct lbs_private *priv = file->private_data; 37 size_t pos = 0; 38 unsigned long addr = get_zeroed_page(GFP_KERNEL); 39 char *buf = (char *)addr; 40 ssize_t res; 41 if (!buf) 42 return -ENOMEM; 43 44 pos += snprintf(buf+pos, len-pos, "state = %s\n", 45 szStates[priv->connect_status]); 46 pos += snprintf(buf+pos, len-pos, "region_code = %02x\n", 47 (u32) priv->regioncode); 48 49 res = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 50 51 free_page(addr); 52 return res; 53} 54 55static ssize_t lbs_sleepparams_write(struct file *file, 56 const char __user *user_buf, size_t count, 57 loff_t *ppos) 58{ 59 struct lbs_private *priv = file->private_data; 60 ssize_t ret; 61 struct sleep_params sp; 62 int p1, p2, p3, p4, p5, p6; 63 char *buf; 64 65 buf = memdup_user_nul(user_buf, min(count, len - 1)); 66 if (IS_ERR(buf)) 67 return PTR_ERR(buf); 68 69 ret = sscanf(buf, "%d %d %d %d %d %d", &p1, &p2, &p3, &p4, &p5, &p6); 70 if (ret != 6) { 71 ret = -EINVAL; 72 goto out_unlock; 73 } 74 sp.sp_error = p1; 75 sp.sp_offset = p2; 76 sp.sp_stabletime = p3; 77 sp.sp_calcontrol = p4; 78 sp.sp_extsleepclk = p5; 79 sp.sp_reserved = p6; 80 81 ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_SET, &sp); 82 if (!ret) 83 ret = count; 84 else if (ret > 0) 85 ret = -EINVAL; 86 87out_unlock: 88 kfree(buf); 89 return ret; 90} 91 92static ssize_t lbs_sleepparams_read(struct file *file, char __user *userbuf, 93 size_t count, loff_t *ppos) 94{ 95 struct lbs_private *priv = file->private_data; 96 ssize_t ret; 97 size_t pos = 0; 98 struct sleep_params sp; 99 unsigned long addr = get_zeroed_page(GFP_KERNEL); 100 char *buf = (char *)addr; 101 if (!buf) 102 return -ENOMEM; 103 104 ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_GET, &sp); 105 if (ret) 106 goto out_unlock; 107 108 pos += snprintf(buf, len, "%d %d %d %d %d %d\n", sp.sp_error, 109 sp.sp_offset, sp.sp_stabletime, 110 sp.sp_calcontrol, sp.sp_extsleepclk, 111 sp.sp_reserved); 112 113 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 114 115out_unlock: 116 free_page(addr); 117 return ret; 118} 119 120static ssize_t lbs_host_sleep_write(struct file *file, 121 const char __user *user_buf, size_t count, 122 loff_t *ppos) 123{ 124 struct lbs_private *priv = file->private_data; 125 ssize_t ret; 126 int host_sleep; 127 char *buf; 128 129 buf = memdup_user_nul(user_buf, min(count, len - 1)); 130 if (IS_ERR(buf)) 131 return PTR_ERR(buf); 132 133 ret = sscanf(buf, "%d", &host_sleep); 134 if (ret != 1) { 135 ret = -EINVAL; 136 goto out_unlock; 137 } 138 139 if (host_sleep == 0) 140 ret = lbs_set_host_sleep(priv, 0); 141 else if (host_sleep == 1) { 142 if (priv->wol_criteria == EHS_REMOVE_WAKEUP) { 143 netdev_info(priv->dev, 144 "wake parameters not configured\n"); 145 ret = -EINVAL; 146 goto out_unlock; 147 } 148 ret = lbs_set_host_sleep(priv, 1); 149 } else { 150 netdev_err(priv->dev, "invalid option\n"); 151 ret = -EINVAL; 152 } 153 154 if (!ret) 155 ret = count; 156 157out_unlock: 158 kfree(buf); 159 return ret; 160} 161 162static ssize_t lbs_host_sleep_read(struct file *file, char __user *userbuf, 163 size_t count, loff_t *ppos) 164{ 165 struct lbs_private *priv = file->private_data; 166 ssize_t ret; 167 size_t pos = 0; 168 unsigned long addr = get_zeroed_page(GFP_KERNEL); 169 char *buf = (char *)addr; 170 if (!buf) 171 return -ENOMEM; 172 173 pos += snprintf(buf, len, "%d\n", priv->is_host_sleep_activated); 174 175 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 176 177 free_page(addr); 178 return ret; 179} 180 181/* 182 * When calling CMD_802_11_SUBSCRIBE_EVENT with CMD_ACT_GET, me might 183 * get a bunch of vendor-specific TLVs (a.k.a. IEs) back from the 184 * firmware. Here's an example: 185 * 04 01 02 00 00 00 05 01 02 00 00 00 06 01 02 00 186 * 00 00 07 01 02 00 3c 00 00 00 00 00 00 00 03 03 187 * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 188 * 189 * The 04 01 is the TLV type (here TLV_TYPE_RSSI_LOW), 02 00 is the length, 190 * 00 00 are the data bytes of this TLV. For this TLV, their meaning is 191 * defined in mrvlietypes_thresholds 192 * 193 * This function searches in this TLV data chunk for a given TLV type 194 * and returns a pointer to the first data byte of the TLV, or to NULL 195 * if the TLV hasn't been found. 196 */ 197static void *lbs_tlv_find(uint16_t tlv_type, const uint8_t *tlv, uint16_t size) 198{ 199 struct mrvl_ie_header *tlv_h; 200 uint16_t length; 201 ssize_t pos = 0; 202 203 while (pos < size) { 204 tlv_h = (struct mrvl_ie_header *) tlv; 205 if (!tlv_h->len) 206 return NULL; 207 if (tlv_h->type == cpu_to_le16(tlv_type)) 208 return tlv_h; 209 length = le16_to_cpu(tlv_h->len) + sizeof(*tlv_h); 210 pos += length; 211 tlv += length; 212 } 213 return NULL; 214} 215 216 217static ssize_t lbs_threshold_read(uint16_t tlv_type, uint16_t event_mask, 218 struct file *file, char __user *userbuf, 219 size_t count, loff_t *ppos) 220{ 221 struct cmd_ds_802_11_subscribe_event *subscribed; 222 struct mrvl_ie_thresholds *got; 223 struct lbs_private *priv = file->private_data; 224 ssize_t ret = 0; 225 size_t pos = 0; 226 char *buf; 227 u8 value; 228 u8 freq; 229 int events = 0; 230 231 buf = (char *)get_zeroed_page(GFP_KERNEL); 232 if (!buf) 233 return -ENOMEM; 234 235 subscribed = kzalloc(sizeof(*subscribed), GFP_KERNEL); 236 if (!subscribed) { 237 ret = -ENOMEM; 238 goto out_page; 239 } 240 241 subscribed->hdr.size = cpu_to_le16(sizeof(*subscribed)); 242 subscribed->action = cpu_to_le16(CMD_ACT_GET); 243 244 ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, subscribed); 245 if (ret) 246 goto out_cmd; 247 248 got = lbs_tlv_find(tlv_type, subscribed->tlv, sizeof(subscribed->tlv)); 249 if (got) { 250 value = got->value; 251 freq = got->freq; 252 events = le16_to_cpu(subscribed->events); 253 254 pos += snprintf(buf, len, "%d %d %d\n", value, freq, 255 !!(events & event_mask)); 256 } 257 258 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 259 260 out_cmd: 261 kfree(subscribed); 262 263 out_page: 264 free_page((unsigned long)buf); 265 return ret; 266} 267 268 269static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask, 270 struct file *file, 271 const char __user *userbuf, size_t count, 272 loff_t *ppos) 273{ 274 struct cmd_ds_802_11_subscribe_event *events; 275 struct mrvl_ie_thresholds *tlv; 276 struct lbs_private *priv = file->private_data; 277 int value, freq, new_mask; 278 uint16_t curr_mask; 279 char *buf; 280 int ret; 281 282 buf = memdup_user_nul(userbuf, min(count, len - 1)); 283 if (IS_ERR(buf)) 284 return PTR_ERR(buf); 285 286 ret = sscanf(buf, "%d %d %d", &value, &freq, &new_mask); 287 if (ret != 3) { 288 ret = -EINVAL; 289 goto out_page; 290 } 291 events = kzalloc(sizeof(*events), GFP_KERNEL); 292 if (!events) { 293 ret = -ENOMEM; 294 goto out_page; 295 } 296 297 events->hdr.size = cpu_to_le16(sizeof(*events)); 298 events->action = cpu_to_le16(CMD_ACT_GET); 299 300 ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, events); 301 if (ret) 302 goto out_events; 303 304 curr_mask = le16_to_cpu(events->events); 305 306 if (new_mask) 307 new_mask = curr_mask | event_mask; 308 else 309 new_mask = curr_mask & ~event_mask; 310 311 /* Now everything is set and we can send stuff down to the firmware */ 312 313 tlv = (void *)events->tlv; 314 315 events->action = cpu_to_le16(CMD_ACT_SET); 316 events->events = cpu_to_le16(new_mask); 317 tlv->header.type = cpu_to_le16(tlv_type); 318 tlv->header.len = cpu_to_le16(sizeof(*tlv) - sizeof(tlv->header)); 319 tlv->value = value; 320 if (tlv_type != TLV_TYPE_BCNMISS) 321 tlv->freq = freq; 322 323 /* The command header, the action, the event mask, and one TLV */ 324 events->hdr.size = cpu_to_le16(sizeof(events->hdr) + 4 + sizeof(*tlv)); 325 326 ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, events); 327 328 if (!ret) 329 ret = count; 330 out_events: 331 kfree(events); 332 out_page: 333 kfree(buf); 334 return ret; 335} 336 337 338static ssize_t lbs_lowrssi_read(struct file *file, char __user *userbuf, 339 size_t count, loff_t *ppos) 340{ 341 return lbs_threshold_read(TLV_TYPE_RSSI_LOW, CMD_SUBSCRIBE_RSSI_LOW, 342 file, userbuf, count, ppos); 343} 344 345 346static ssize_t lbs_lowrssi_write(struct file *file, const char __user *userbuf, 347 size_t count, loff_t *ppos) 348{ 349 return lbs_threshold_write(TLV_TYPE_RSSI_LOW, CMD_SUBSCRIBE_RSSI_LOW, 350 file, userbuf, count, ppos); 351} 352 353 354static ssize_t lbs_lowsnr_read(struct file *file, char __user *userbuf, 355 size_t count, loff_t *ppos) 356{ 357 return lbs_threshold_read(TLV_TYPE_SNR_LOW, CMD_SUBSCRIBE_SNR_LOW, 358 file, userbuf, count, ppos); 359} 360 361 362static ssize_t lbs_lowsnr_write(struct file *file, const char __user *userbuf, 363 size_t count, loff_t *ppos) 364{ 365 return lbs_threshold_write(TLV_TYPE_SNR_LOW, CMD_SUBSCRIBE_SNR_LOW, 366 file, userbuf, count, ppos); 367} 368 369 370static ssize_t lbs_failcount_read(struct file *file, char __user *userbuf, 371 size_t count, loff_t *ppos) 372{ 373 return lbs_threshold_read(TLV_TYPE_FAILCOUNT, CMD_SUBSCRIBE_FAILCOUNT, 374 file, userbuf, count, ppos); 375} 376 377 378static ssize_t lbs_failcount_write(struct file *file, const char __user *userbuf, 379 size_t count, loff_t *ppos) 380{ 381 return lbs_threshold_write(TLV_TYPE_FAILCOUNT, CMD_SUBSCRIBE_FAILCOUNT, 382 file, userbuf, count, ppos); 383} 384 385 386static ssize_t lbs_highrssi_read(struct file *file, char __user *userbuf, 387 size_t count, loff_t *ppos) 388{ 389 return lbs_threshold_read(TLV_TYPE_RSSI_HIGH, CMD_SUBSCRIBE_RSSI_HIGH, 390 file, userbuf, count, ppos); 391} 392 393 394static ssize_t lbs_highrssi_write(struct file *file, const char __user *userbuf, 395 size_t count, loff_t *ppos) 396{ 397 return lbs_threshold_write(TLV_TYPE_RSSI_HIGH, CMD_SUBSCRIBE_RSSI_HIGH, 398 file, userbuf, count, ppos); 399} 400 401 402static ssize_t lbs_highsnr_read(struct file *file, char __user *userbuf, 403 size_t count, loff_t *ppos) 404{ 405 return lbs_threshold_read(TLV_TYPE_SNR_HIGH, CMD_SUBSCRIBE_SNR_HIGH, 406 file, userbuf, count, ppos); 407} 408 409 410static ssize_t lbs_highsnr_write(struct file *file, const char __user *userbuf, 411 size_t count, loff_t *ppos) 412{ 413 return lbs_threshold_write(TLV_TYPE_SNR_HIGH, CMD_SUBSCRIBE_SNR_HIGH, 414 file, userbuf, count, ppos); 415} 416 417static ssize_t lbs_bcnmiss_read(struct file *file, char __user *userbuf, 418 size_t count, loff_t *ppos) 419{ 420 return lbs_threshold_read(TLV_TYPE_BCNMISS, CMD_SUBSCRIBE_BCNMISS, 421 file, userbuf, count, ppos); 422} 423 424 425static ssize_t lbs_bcnmiss_write(struct file *file, const char __user *userbuf, 426 size_t count, loff_t *ppos) 427{ 428 return lbs_threshold_write(TLV_TYPE_BCNMISS, CMD_SUBSCRIBE_BCNMISS, 429 file, userbuf, count, ppos); 430} 431 432 433static ssize_t lbs_rdmac_read(struct file *file, char __user *userbuf, 434 size_t count, loff_t *ppos) 435{ 436 struct lbs_private *priv = file->private_data; 437 ssize_t pos = 0; 438 int ret; 439 unsigned long addr = get_zeroed_page(GFP_KERNEL); 440 char *buf = (char *)addr; 441 u32 val = 0; 442 443 if (!buf) 444 return -ENOMEM; 445 446 ret = lbs_get_reg(priv, CMD_MAC_REG_ACCESS, priv->mac_offset, &val); 447 mdelay(10); 448 if (!ret) { 449 pos = snprintf(buf, len, "MAC[0x%x] = 0x%08x\n", 450 priv->mac_offset, val); 451 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 452 } 453 free_page(addr); 454 return ret; 455} 456 457static ssize_t lbs_rdmac_write(struct file *file, 458 const char __user *userbuf, 459 size_t count, loff_t *ppos) 460{ 461 struct lbs_private *priv = file->private_data; 462 char *buf; 463 464 buf = memdup_user_nul(userbuf, min(count, len - 1)); 465 if (IS_ERR(buf)) 466 return PTR_ERR(buf); 467 468 priv->mac_offset = simple_strtoul(buf, NULL, 16); 469 kfree(buf); 470 return count; 471} 472 473static ssize_t lbs_wrmac_write(struct file *file, 474 const char __user *userbuf, 475 size_t count, loff_t *ppos) 476{ 477 478 struct lbs_private *priv = file->private_data; 479 ssize_t res; 480 u32 offset, value; 481 char *buf; 482 483 buf = memdup_user_nul(userbuf, min(count, len - 1)); 484 if (IS_ERR(buf)) 485 return PTR_ERR(buf); 486 487 res = sscanf(buf, "%x %x", &offset, &value); 488 if (res != 2) { 489 res = -EFAULT; 490 goto out_unlock; 491 } 492 493 res = lbs_set_reg(priv, CMD_MAC_REG_ACCESS, offset, value); 494 mdelay(10); 495 496 if (!res) 497 res = count; 498out_unlock: 499 kfree(buf); 500 return res; 501} 502 503static ssize_t lbs_rdbbp_read(struct file *file, char __user *userbuf, 504 size_t count, loff_t *ppos) 505{ 506 struct lbs_private *priv = file->private_data; 507 ssize_t pos = 0; 508 int ret; 509 unsigned long addr = get_zeroed_page(GFP_KERNEL); 510 char *buf = (char *)addr; 511 u32 val; 512 513 if (!buf) 514 return -ENOMEM; 515 516 ret = lbs_get_reg(priv, CMD_BBP_REG_ACCESS, priv->bbp_offset, &val); 517 mdelay(10); 518 if (!ret) { 519 pos = snprintf(buf, len, "BBP[0x%x] = 0x%08x\n", 520 priv->bbp_offset, val); 521 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 522 } 523 free_page(addr); 524 525 return ret; 526} 527 528static ssize_t lbs_rdbbp_write(struct file *file, 529 const char __user *userbuf, 530 size_t count, loff_t *ppos) 531{ 532 struct lbs_private *priv = file->private_data; 533 char *buf; 534 535 buf = memdup_user_nul(userbuf, min(count, len - 1)); 536 if (IS_ERR(buf)) 537 return PTR_ERR(buf); 538 539 priv->bbp_offset = simple_strtoul(buf, NULL, 16); 540 kfree(buf); 541 542 return count; 543} 544 545static ssize_t lbs_wrbbp_write(struct file *file, 546 const char __user *userbuf, 547 size_t count, loff_t *ppos) 548{ 549 550 struct lbs_private *priv = file->private_data; 551 ssize_t res; 552 u32 offset, value; 553 char *buf; 554 555 buf = memdup_user_nul(userbuf, min(count, len - 1)); 556 if (IS_ERR(buf)) 557 return PTR_ERR(buf); 558 559 res = sscanf(buf, "%x %x", &offset, &value); 560 if (res != 2) { 561 res = -EFAULT; 562 goto out_unlock; 563 } 564 565 res = lbs_set_reg(priv, CMD_BBP_REG_ACCESS, offset, value); 566 mdelay(10); 567 568 if (!res) 569 res = count; 570out_unlock: 571 kfree(buf); 572 return res; 573} 574 575static ssize_t lbs_rdrf_read(struct file *file, char __user *userbuf, 576 size_t count, loff_t *ppos) 577{ 578 struct lbs_private *priv = file->private_data; 579 ssize_t pos = 0; 580 int ret; 581 unsigned long addr = get_zeroed_page(GFP_KERNEL); 582 char *buf = (char *)addr; 583 u32 val; 584 585 if (!buf) 586 return -ENOMEM; 587 588 ret = lbs_get_reg(priv, CMD_RF_REG_ACCESS, priv->rf_offset, &val); 589 mdelay(10); 590 if (!ret) { 591 pos = snprintf(buf, len, "RF[0x%x] = 0x%08x\n", 592 priv->rf_offset, val); 593 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 594 } 595 free_page(addr); 596 597 return ret; 598} 599 600static ssize_t lbs_rdrf_write(struct file *file, 601 const char __user *userbuf, 602 size_t count, loff_t *ppos) 603{ 604 struct lbs_private *priv = file->private_data; 605 char *buf; 606 607 buf = memdup_user_nul(userbuf, min(count, len - 1)); 608 if (IS_ERR(buf)) 609 return PTR_ERR(buf); 610 611 priv->rf_offset = simple_strtoul(buf, NULL, 16); 612 kfree(buf); 613 return count; 614} 615 616static ssize_t lbs_wrrf_write(struct file *file, 617 const char __user *userbuf, 618 size_t count, loff_t *ppos) 619{ 620 621 struct lbs_private *priv = file->private_data; 622 ssize_t res; 623 u32 offset, value; 624 char *buf; 625 626 buf = memdup_user_nul(userbuf, min(count, len - 1)); 627 if (IS_ERR(buf)) 628 return PTR_ERR(buf); 629 630 res = sscanf(buf, "%x %x", &offset, &value); 631 if (res != 2) { 632 res = -EFAULT; 633 goto out_unlock; 634 } 635 636 res = lbs_set_reg(priv, CMD_RF_REG_ACCESS, offset, value); 637 mdelay(10); 638 639 if (!res) 640 res = count; 641out_unlock: 642 kfree(buf); 643 return res; 644} 645 646#define FOPS(fread, fwrite) { \ 647 .owner = THIS_MODULE, \ 648 .open = simple_open, \ 649 .read = (fread), \ 650 .write = (fwrite), \ 651 .llseek = generic_file_llseek, \ 652} 653 654struct lbs_debugfs_files { 655 const char *name; 656 umode_t perm; 657 struct file_operations fops; 658}; 659 660static const struct lbs_debugfs_files debugfs_files[] = { 661 { "info", 0444, FOPS(lbs_dev_info, write_file_dummy), }, 662 { "sleepparams", 0644, FOPS(lbs_sleepparams_read, 663 lbs_sleepparams_write), }, 664 { "hostsleep", 0644, FOPS(lbs_host_sleep_read, 665 lbs_host_sleep_write), }, 666}; 667 668static const struct lbs_debugfs_files debugfs_events_files[] = { 669 {"low_rssi", 0644, FOPS(lbs_lowrssi_read, 670 lbs_lowrssi_write), }, 671 {"low_snr", 0644, FOPS(lbs_lowsnr_read, 672 lbs_lowsnr_write), }, 673 {"failure_count", 0644, FOPS(lbs_failcount_read, 674 lbs_failcount_write), }, 675 {"beacon_missed", 0644, FOPS(lbs_bcnmiss_read, 676 lbs_bcnmiss_write), }, 677 {"high_rssi", 0644, FOPS(lbs_highrssi_read, 678 lbs_highrssi_write), }, 679 {"high_snr", 0644, FOPS(lbs_highsnr_read, 680 lbs_highsnr_write), }, 681}; 682 683static const struct lbs_debugfs_files debugfs_regs_files[] = { 684 {"rdmac", 0644, FOPS(lbs_rdmac_read, lbs_rdmac_write), }, 685 {"wrmac", 0600, FOPS(NULL, lbs_wrmac_write), }, 686 {"rdbbp", 0644, FOPS(lbs_rdbbp_read, lbs_rdbbp_write), }, 687 {"wrbbp", 0600, FOPS(NULL, lbs_wrbbp_write), }, 688 {"rdrf", 0644, FOPS(lbs_rdrf_read, lbs_rdrf_write), }, 689 {"wrrf", 0600, FOPS(NULL, lbs_wrrf_write), }, 690}; 691 692void lbs_debugfs_init(void) 693{ 694 if (!lbs_dir) 695 lbs_dir = debugfs_create_dir("lbs_wireless", NULL); 696} 697 698void lbs_debugfs_remove(void) 699{ 700 debugfs_remove(lbs_dir); 701} 702 703void lbs_debugfs_init_one(struct lbs_private *priv, struct net_device *dev) 704{ 705 int i; 706 const struct lbs_debugfs_files *files; 707 if (!lbs_dir) 708 goto exit; 709 710 priv->debugfs_dir = debugfs_create_dir(dev->name, lbs_dir); 711 712 for (i=0; i<ARRAY_SIZE(debugfs_files); i++) { 713 files = &debugfs_files[i]; 714 priv->debugfs_files[i] = debugfs_create_file(files->name, 715 files->perm, 716 priv->debugfs_dir, 717 priv, 718 &files->fops); 719 } 720 721 priv->events_dir = debugfs_create_dir("subscribed_events", priv->debugfs_dir); 722 723 for (i=0; i<ARRAY_SIZE(debugfs_events_files); i++) { 724 files = &debugfs_events_files[i]; 725 priv->debugfs_events_files[i] = debugfs_create_file(files->name, 726 files->perm, 727 priv->events_dir, 728 priv, 729 &files->fops); 730 } 731 732 priv->regs_dir = debugfs_create_dir("registers", priv->debugfs_dir); 733 734 for (i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) { 735 files = &debugfs_regs_files[i]; 736 priv->debugfs_regs_files[i] = debugfs_create_file(files->name, 737 files->perm, 738 priv->regs_dir, 739 priv, 740 &files->fops); 741 } 742 743#ifdef PROC_DEBUG 744 lbs_debug_init(priv); 745#endif 746exit: 747 return; 748} 749 750void lbs_debugfs_remove_one(struct lbs_private *priv) 751{ 752 int i; 753 754 for(i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) 755 debugfs_remove(priv->debugfs_regs_files[i]); 756 757 debugfs_remove(priv->regs_dir); 758 759 for(i=0; i<ARRAY_SIZE(debugfs_events_files); i++) 760 debugfs_remove(priv->debugfs_events_files[i]); 761 762 debugfs_remove(priv->events_dir); 763#ifdef PROC_DEBUG 764 debugfs_remove(priv->debugfs_debug); 765#endif 766 for(i=0; i<ARRAY_SIZE(debugfs_files); i++) 767 debugfs_remove(priv->debugfs_files[i]); 768 debugfs_remove(priv->debugfs_dir); 769} 770 771 772 773/* debug entry */ 774 775#ifdef PROC_DEBUG 776 777#define item_size(n) (sizeof_field(struct lbs_private, n)) 778#define item_addr(n) (offsetof(struct lbs_private, n)) 779 780 781struct debug_data { 782 char name[32]; 783 u32 size; 784 size_t addr; 785}; 786 787/* To debug any member of struct lbs_private, simply add one line here. 788 */ 789static struct debug_data items[] = { 790 {"psmode", item_size(psmode), item_addr(psmode)}, 791 {"psstate", item_size(psstate), item_addr(psstate)}, 792}; 793 794static int num_of_items = ARRAY_SIZE(items); 795 796/** 797 * lbs_debugfs_read - proc read function 798 * 799 * @file: file to read 800 * @userbuf: pointer to buffer 801 * @count: number of bytes to read 802 * @ppos: read data starting position 803 * 804 * returns: amount of data read or negative error code 805 */ 806static ssize_t lbs_debugfs_read(struct file *file, char __user *userbuf, 807 size_t count, loff_t *ppos) 808{ 809 int val = 0; 810 size_t pos = 0; 811 ssize_t res; 812 char *p; 813 int i; 814 struct debug_data *d; 815 unsigned long addr = get_zeroed_page(GFP_KERNEL); 816 char *buf = (char *)addr; 817 if (!buf) 818 return -ENOMEM; 819 820 p = buf; 821 822 d = file->private_data; 823 824 for (i = 0; i < num_of_items; i++) { 825 if (d[i].size == 1) 826 val = *((u8 *) d[i].addr); 827 else if (d[i].size == 2) 828 val = *((u16 *) d[i].addr); 829 else if (d[i].size == 4) 830 val = *((u32 *) d[i].addr); 831 else if (d[i].size == 8) 832 val = *((u64 *) d[i].addr); 833 834 pos += sprintf(p + pos, "%s=%d\n", d[i].name, val); 835 } 836 837 res = simple_read_from_buffer(userbuf, count, ppos, p, pos); 838 839 free_page(addr); 840 return res; 841} 842 843/** 844 * lbs_debugfs_write - proc write function 845 * 846 * @f: file pointer 847 * @buf: pointer to data buffer 848 * @cnt: data number to write 849 * @ppos: file position 850 * 851 * returns: amount of data written 852 */ 853static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf, 854 size_t cnt, loff_t *ppos) 855{ 856 int r, i; 857 char *pdata; 858 char *p; 859 char *p0; 860 char *p1; 861 char *p2; 862 struct debug_data *d = f->private_data; 863 864 if (cnt == 0) 865 return 0; 866 867 pdata = memdup_user_nul(buf, cnt); 868 if (IS_ERR(pdata)) 869 return PTR_ERR(pdata); 870 871 p0 = pdata; 872 for (i = 0; i < num_of_items; i++) { 873 do { 874 p = strstr(p0, d[i].name); 875 if (p == NULL) 876 break; 877 p1 = strchr(p, '\n'); 878 if (p1 == NULL) 879 break; 880 p0 = p1++; 881 p2 = strchr(p, '='); 882 if (!p2) 883 break; 884 p2++; 885 r = simple_strtoul(p2, NULL, 0); 886 if (d[i].size == 1) 887 *((u8 *) d[i].addr) = (u8) r; 888 else if (d[i].size == 2) 889 *((u16 *) d[i].addr) = (u16) r; 890 else if (d[i].size == 4) 891 *((u32 *) d[i].addr) = (u32) r; 892 else if (d[i].size == 8) 893 *((u64 *) d[i].addr) = (u64) r; 894 break; 895 } while (1); 896 } 897 kfree(pdata); 898 899 return (ssize_t)cnt; 900} 901 902static const struct file_operations lbs_debug_fops = { 903 .owner = THIS_MODULE, 904 .open = simple_open, 905 .write = lbs_debugfs_write, 906 .read = lbs_debugfs_read, 907 .llseek = default_llseek, 908}; 909 910/** 911 * lbs_debug_init - create debug proc file 912 * 913 * @priv: pointer to &struct lbs_private 914 * 915 * returns: N/A 916 */ 917static void lbs_debug_init(struct lbs_private *priv) 918{ 919 int i; 920 921 if (!priv->debugfs_dir) 922 return; 923 924 for (i = 0; i < num_of_items; i++) 925 items[i].addr += (size_t) priv; 926 927 priv->debugfs_debug = debugfs_create_file("debug", 0644, 928 priv->debugfs_dir, &items[0], 929 &lbs_debug_fops); 930} 931#endif 932