i915_sysfs.c revision 1.1.1.4
1 /* $NetBSD: i915_sysfs.c,v 1.1.1.4 2021/12/18 20:15:26 riastradh Exp $ */ 2 3 /* 4 * Copyright 2012 Intel Corporation 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 23 * IN THE SOFTWARE. 24 * 25 * Authors: 26 * Ben Widawsky <ben (at) bwidawsk.net> 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: i915_sysfs.c,v 1.1.1.4 2021/12/18 20:15:26 riastradh Exp $"); 32 33 #include <linux/device.h> 34 #include <linux/module.h> 35 #include <linux/stat.h> 36 #include <linux/sysfs.h> 37 38 #include "gt/intel_rc6.h" 39 #include "gt/intel_rps.h" 40 41 #include "i915_drv.h" 42 #include "i915_sysfs.h" 43 #include "intel_pm.h" 44 #include "intel_sideband.h" 45 46 static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev) 47 { 48 struct drm_minor *minor = dev_get_drvdata(kdev); 49 return to_i915(minor->dev); 50 } 51 52 #ifdef CONFIG_PM 53 static u32 calc_residency(struct drm_i915_private *dev_priv, 54 i915_reg_t reg) 55 { 56 intel_wakeref_t wakeref; 57 u64 res = 0; 58 59 with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) 60 res = intel_rc6_residency_us(&dev_priv->gt.rc6, reg); 61 62 return DIV_ROUND_CLOSEST_ULL(res, 1000); 63 } 64 65 static ssize_t 66 show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf) 67 { 68 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 69 unsigned int mask; 70 71 mask = 0; 72 if (HAS_RC6(dev_priv)) 73 mask |= BIT(0); 74 if (HAS_RC6p(dev_priv)) 75 mask |= BIT(1); 76 if (HAS_RC6pp(dev_priv)) 77 mask |= BIT(2); 78 79 return snprintf(buf, PAGE_SIZE, "%x\n", mask); 80 } 81 82 static ssize_t 83 show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf) 84 { 85 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 86 u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6); 87 return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency); 88 } 89 90 static ssize_t 91 show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf) 92 { 93 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 94 u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p); 95 return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency); 96 } 97 98 static ssize_t 99 show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf) 100 { 101 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 102 u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp); 103 return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency); 104 } 105 106 static ssize_t 107 show_media_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf) 108 { 109 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 110 u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6); 111 return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency); 112 } 113 114 static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL); 115 static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL); 116 static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL); 117 static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL); 118 static DEVICE_ATTR(media_rc6_residency_ms, S_IRUGO, show_media_rc6_ms, NULL); 119 120 static struct attribute *rc6_attrs[] = { 121 &dev_attr_rc6_enable.attr, 122 &dev_attr_rc6_residency_ms.attr, 123 NULL 124 }; 125 126 static const struct attribute_group rc6_attr_group = { 127 .name = power_group_name, 128 .attrs = rc6_attrs 129 }; 130 131 static struct attribute *rc6p_attrs[] = { 132 &dev_attr_rc6p_residency_ms.attr, 133 &dev_attr_rc6pp_residency_ms.attr, 134 NULL 135 }; 136 137 static const struct attribute_group rc6p_attr_group = { 138 .name = power_group_name, 139 .attrs = rc6p_attrs 140 }; 141 142 static struct attribute *media_rc6_attrs[] = { 143 &dev_attr_media_rc6_residency_ms.attr, 144 NULL 145 }; 146 147 static const struct attribute_group media_rc6_attr_group = { 148 .name = power_group_name, 149 .attrs = media_rc6_attrs 150 }; 151 #endif 152 153 static int l3_access_valid(struct drm_i915_private *i915, loff_t offset) 154 { 155 if (!HAS_L3_DPF(i915)) 156 return -EPERM; 157 158 if (!IS_ALIGNED(offset, sizeof(u32))) 159 return -EINVAL; 160 161 if (offset >= GEN7_L3LOG_SIZE) 162 return -ENXIO; 163 164 return 0; 165 } 166 167 static ssize_t 168 i915_l3_read(struct file *filp, struct kobject *kobj, 169 struct bin_attribute *attr, char *buf, 170 loff_t offset, size_t count) 171 { 172 struct device *kdev = kobj_to_dev(kobj); 173 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); 174 int slice = (int)(uintptr_t)attr->private; 175 int ret; 176 177 ret = l3_access_valid(i915, offset); 178 if (ret) 179 return ret; 180 181 count = round_down(count, sizeof(u32)); 182 count = min_t(size_t, GEN7_L3LOG_SIZE - offset, count); 183 memset(buf, 0, count); 184 185 spin_lock(&i915->gem.contexts.lock); 186 if (i915->l3_parity.remap_info[slice]) 187 memcpy(buf, 188 i915->l3_parity.remap_info[slice] + offset / sizeof(u32), 189 count); 190 spin_unlock(&i915->gem.contexts.lock); 191 192 return count; 193 } 194 195 static ssize_t 196 i915_l3_write(struct file *filp, struct kobject *kobj, 197 struct bin_attribute *attr, char *buf, 198 loff_t offset, size_t count) 199 { 200 struct device *kdev = kobj_to_dev(kobj); 201 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); 202 int slice = (int)(uintptr_t)attr->private; 203 u32 *remap_info, *freeme = NULL; 204 struct i915_gem_context *ctx; 205 int ret; 206 207 ret = l3_access_valid(i915, offset); 208 if (ret) 209 return ret; 210 211 if (count < sizeof(u32)) 212 return -EINVAL; 213 214 remap_info = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL); 215 if (!remap_info) 216 return -ENOMEM; 217 218 spin_lock(&i915->gem.contexts.lock); 219 220 if (i915->l3_parity.remap_info[slice]) { 221 freeme = remap_info; 222 remap_info = i915->l3_parity.remap_info[slice]; 223 } else { 224 i915->l3_parity.remap_info[slice] = remap_info; 225 } 226 227 count = round_down(count, sizeof(u32)); 228 memcpy(remap_info + offset / sizeof(u32), buf, count); 229 230 /* NB: We defer the remapping until we switch to the context */ 231 list_for_each_entry(ctx, &i915->gem.contexts.list, link) 232 ctx->remap_slice |= BIT(slice); 233 234 spin_unlock(&i915->gem.contexts.lock); 235 kfree(freeme); 236 237 /* 238 * TODO: Ideally we really want a GPU reset here to make sure errors 239 * aren't propagated. Since I cannot find a stable way to reset the GPU 240 * at this point it is left as a TODO. 241 */ 242 243 return count; 244 } 245 246 static const struct bin_attribute dpf_attrs = { 247 .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)}, 248 .size = GEN7_L3LOG_SIZE, 249 .read = i915_l3_read, 250 .write = i915_l3_write, 251 .mmap = NULL, 252 .private = (void *)0 253 }; 254 255 static const struct bin_attribute dpf_attrs_1 = { 256 .attr = {.name = "l3_parity_slice_1", .mode = (S_IRUSR | S_IWUSR)}, 257 .size = GEN7_L3LOG_SIZE, 258 .read = i915_l3_read, 259 .write = i915_l3_write, 260 .mmap = NULL, 261 .private = (void *)1 262 }; 263 264 static ssize_t gt_act_freq_mhz_show(struct device *kdev, 265 struct device_attribute *attr, char *buf) 266 { 267 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); 268 struct intel_rps *rps = &i915->gt.rps; 269 270 return snprintf(buf, PAGE_SIZE, "%d\n", 271 intel_rps_read_actual_frequency(rps)); 272 } 273 274 static ssize_t gt_cur_freq_mhz_show(struct device *kdev, 275 struct device_attribute *attr, char *buf) 276 { 277 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); 278 struct intel_rps *rps = &i915->gt.rps; 279 280 return snprintf(buf, PAGE_SIZE, "%d\n", 281 intel_gpu_freq(rps, rps->cur_freq)); 282 } 283 284 static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) 285 { 286 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); 287 struct intel_rps *rps = &i915->gt.rps; 288 289 return snprintf(buf, PAGE_SIZE, "%d\n", 290 intel_gpu_freq(rps, rps->boost_freq)); 291 } 292 293 static ssize_t gt_boost_freq_mhz_store(struct device *kdev, 294 struct device_attribute *attr, 295 const char *buf, size_t count) 296 { 297 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 298 struct intel_rps *rps = &dev_priv->gt.rps; 299 bool boost = false; 300 ssize_t ret; 301 u32 val; 302 303 ret = kstrtou32(buf, 0, &val); 304 if (ret) 305 return ret; 306 307 /* Validate against (static) hardware limits */ 308 val = intel_freq_opcode(rps, val); 309 if (val < rps->min_freq || val > rps->max_freq) 310 return -EINVAL; 311 312 mutex_lock(&rps->lock); 313 if (val != rps->boost_freq) { 314 rps->boost_freq = val; 315 boost = atomic_read(&rps->num_waiters); 316 } 317 mutex_unlock(&rps->lock); 318 if (boost) 319 schedule_work(&rps->work); 320 321 return count; 322 } 323 324 static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev, 325 struct device_attribute *attr, char *buf) 326 { 327 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 328 struct intel_rps *rps = &dev_priv->gt.rps; 329 330 return snprintf(buf, PAGE_SIZE, "%d\n", 331 intel_gpu_freq(rps, rps->efficient_freq)); 332 } 333 334 static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) 335 { 336 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 337 struct intel_rps *rps = &dev_priv->gt.rps; 338 339 return snprintf(buf, PAGE_SIZE, "%d\n", 340 intel_gpu_freq(rps, rps->max_freq_softlimit)); 341 } 342 343 static ssize_t gt_max_freq_mhz_store(struct device *kdev, 344 struct device_attribute *attr, 345 const char *buf, size_t count) 346 { 347 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 348 struct intel_rps *rps = &dev_priv->gt.rps; 349 ssize_t ret; 350 u32 val; 351 352 ret = kstrtou32(buf, 0, &val); 353 if (ret) 354 return ret; 355 356 mutex_lock(&rps->lock); 357 358 val = intel_freq_opcode(rps, val); 359 if (val < rps->min_freq || 360 val > rps->max_freq || 361 val < rps->min_freq_softlimit) { 362 ret = -EINVAL; 363 goto unlock; 364 } 365 366 if (val > rps->rp0_freq) 367 DRM_DEBUG("User requested overclocking to %d\n", 368 intel_gpu_freq(rps, val)); 369 370 rps->max_freq_softlimit = val; 371 372 val = clamp_t(int, rps->cur_freq, 373 rps->min_freq_softlimit, 374 rps->max_freq_softlimit); 375 376 /* 377 * We still need *_set_rps to process the new max_delay and 378 * update the interrupt limits and PMINTRMSK even though 379 * frequency request may be unchanged. 380 */ 381 intel_rps_set(rps, val); 382 383 unlock: 384 mutex_unlock(&rps->lock); 385 386 return ret ?: count; 387 } 388 389 static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) 390 { 391 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 392 struct intel_rps *rps = &dev_priv->gt.rps; 393 394 return snprintf(buf, PAGE_SIZE, "%d\n", 395 intel_gpu_freq(rps, rps->min_freq_softlimit)); 396 } 397 398 static ssize_t gt_min_freq_mhz_store(struct device *kdev, 399 struct device_attribute *attr, 400 const char *buf, size_t count) 401 { 402 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 403 struct intel_rps *rps = &dev_priv->gt.rps; 404 ssize_t ret; 405 u32 val; 406 407 ret = kstrtou32(buf, 0, &val); 408 if (ret) 409 return ret; 410 411 mutex_lock(&rps->lock); 412 413 val = intel_freq_opcode(rps, val); 414 if (val < rps->min_freq || 415 val > rps->max_freq || 416 val > rps->max_freq_softlimit) { 417 ret = -EINVAL; 418 goto unlock; 419 } 420 421 rps->min_freq_softlimit = val; 422 423 val = clamp_t(int, rps->cur_freq, 424 rps->min_freq_softlimit, 425 rps->max_freq_softlimit); 426 427 /* 428 * We still need *_set_rps to process the new min_delay and 429 * update the interrupt limits and PMINTRMSK even though 430 * frequency request may be unchanged. 431 */ 432 intel_rps_set(rps, val); 433 434 unlock: 435 mutex_unlock(&rps->lock); 436 437 return ret ?: count; 438 } 439 440 static DEVICE_ATTR_RO(gt_act_freq_mhz); 441 static DEVICE_ATTR_RO(gt_cur_freq_mhz); 442 static DEVICE_ATTR_RW(gt_boost_freq_mhz); 443 static DEVICE_ATTR_RW(gt_max_freq_mhz); 444 static DEVICE_ATTR_RW(gt_min_freq_mhz); 445 446 static DEVICE_ATTR_RO(vlv_rpe_freq_mhz); 447 448 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf); 449 static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); 450 static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); 451 static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); 452 453 /* For now we have a static number of RP states */ 454 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) 455 { 456 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 457 struct intel_rps *rps = &dev_priv->gt.rps; 458 u32 val; 459 460 if (attr == &dev_attr_gt_RP0_freq_mhz) 461 val = intel_gpu_freq(rps, rps->rp0_freq); 462 else if (attr == &dev_attr_gt_RP1_freq_mhz) 463 val = intel_gpu_freq(rps, rps->rp1_freq); 464 else if (attr == &dev_attr_gt_RPn_freq_mhz) 465 val = intel_gpu_freq(rps, rps->min_freq); 466 else 467 BUG(); 468 469 return snprintf(buf, PAGE_SIZE, "%d\n", val); 470 } 471 472 static const struct attribute * const gen6_attrs[] = { 473 &dev_attr_gt_act_freq_mhz.attr, 474 &dev_attr_gt_cur_freq_mhz.attr, 475 &dev_attr_gt_boost_freq_mhz.attr, 476 &dev_attr_gt_max_freq_mhz.attr, 477 &dev_attr_gt_min_freq_mhz.attr, 478 &dev_attr_gt_RP0_freq_mhz.attr, 479 &dev_attr_gt_RP1_freq_mhz.attr, 480 &dev_attr_gt_RPn_freq_mhz.attr, 481 NULL, 482 }; 483 484 static const struct attribute * const vlv_attrs[] = { 485 &dev_attr_gt_act_freq_mhz.attr, 486 &dev_attr_gt_cur_freq_mhz.attr, 487 &dev_attr_gt_boost_freq_mhz.attr, 488 &dev_attr_gt_max_freq_mhz.attr, 489 &dev_attr_gt_min_freq_mhz.attr, 490 &dev_attr_gt_RP0_freq_mhz.attr, 491 &dev_attr_gt_RP1_freq_mhz.attr, 492 &dev_attr_gt_RPn_freq_mhz.attr, 493 &dev_attr_vlv_rpe_freq_mhz.attr, 494 NULL, 495 }; 496 497 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) 498 499 static ssize_t error_state_read(struct file *filp, struct kobject *kobj, 500 struct bin_attribute *attr, char *buf, 501 loff_t off, size_t count) 502 { 503 504 struct device *kdev = kobj_to_dev(kobj); 505 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); 506 struct i915_gpu_coredump *gpu; 507 ssize_t ret; 508 509 gpu = i915_first_error_state(i915); 510 if (IS_ERR(gpu)) { 511 ret = PTR_ERR(gpu); 512 } else if (gpu) { 513 ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count); 514 i915_gpu_coredump_put(gpu); 515 } else { 516 const char *str = "No error state collected\n"; 517 size_t len = strlen(str); 518 519 ret = min_t(size_t, count, len - off); 520 memcpy(buf, str + off, ret); 521 } 522 523 return ret; 524 } 525 526 static ssize_t error_state_write(struct file *file, struct kobject *kobj, 527 struct bin_attribute *attr, char *buf, 528 loff_t off, size_t count) 529 { 530 struct device *kdev = kobj_to_dev(kobj); 531 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); 532 533 DRM_DEBUG_DRIVER("Resetting error state\n"); 534 i915_reset_error_state(dev_priv); 535 536 return count; 537 } 538 539 static const struct bin_attribute error_state_attr = { 540 .attr.name = "error", 541 .attr.mode = S_IRUSR | S_IWUSR, 542 .size = 0, 543 .read = error_state_read, 544 .write = error_state_write, 545 }; 546 547 static void i915_setup_error_capture(struct device *kdev) 548 { 549 if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr)) 550 DRM_ERROR("error_state sysfs setup failed\n"); 551 } 552 553 static void i915_teardown_error_capture(struct device *kdev) 554 { 555 sysfs_remove_bin_file(&kdev->kobj, &error_state_attr); 556 } 557 #else 558 static void i915_setup_error_capture(struct device *kdev) {} 559 static void i915_teardown_error_capture(struct device *kdev) {} 560 #endif 561 562 void i915_setup_sysfs(struct drm_i915_private *dev_priv) 563 { 564 struct device *kdev = dev_priv->drm.primary->kdev; 565 int ret; 566 567 #ifdef CONFIG_PM 568 if (HAS_RC6(dev_priv)) { 569 ret = sysfs_merge_group(&kdev->kobj, 570 &rc6_attr_group); 571 if (ret) 572 DRM_ERROR("RC6 residency sysfs setup failed\n"); 573 } 574 if (HAS_RC6p(dev_priv)) { 575 ret = sysfs_merge_group(&kdev->kobj, 576 &rc6p_attr_group); 577 if (ret) 578 DRM_ERROR("RC6p residency sysfs setup failed\n"); 579 } 580 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 581 ret = sysfs_merge_group(&kdev->kobj, 582 &media_rc6_attr_group); 583 if (ret) 584 DRM_ERROR("Media RC6 residency sysfs setup failed\n"); 585 } 586 #endif 587 if (HAS_L3_DPF(dev_priv)) { 588 ret = device_create_bin_file(kdev, &dpf_attrs); 589 if (ret) 590 DRM_ERROR("l3 parity sysfs setup failed\n"); 591 592 if (NUM_L3_SLICES(dev_priv) > 1) { 593 ret = device_create_bin_file(kdev, 594 &dpf_attrs_1); 595 if (ret) 596 DRM_ERROR("l3 parity slice 1 setup failed\n"); 597 } 598 } 599 600 ret = 0; 601 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) 602 ret = sysfs_create_files(&kdev->kobj, vlv_attrs); 603 else if (INTEL_GEN(dev_priv) >= 6) 604 ret = sysfs_create_files(&kdev->kobj, gen6_attrs); 605 if (ret) 606 DRM_ERROR("RPS sysfs setup failed\n"); 607 608 i915_setup_error_capture(kdev); 609 } 610 611 void i915_teardown_sysfs(struct drm_i915_private *dev_priv) 612 { 613 struct device *kdev = dev_priv->drm.primary->kdev; 614 615 i915_teardown_error_capture(kdev); 616 617 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) 618 sysfs_remove_files(&kdev->kobj, vlv_attrs); 619 else 620 sysfs_remove_files(&kdev->kobj, gen6_attrs); 621 device_remove_bin_file(kdev, &dpf_attrs_1); 622 device_remove_bin_file(kdev, &dpf_attrs); 623 #ifdef CONFIG_PM 624 sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group); 625 sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group); 626 #endif 627 } 628
Indexes created Tue Oct 14 01:09:49 GMT 2025