xref: /openbmc/linux/drivers/gpu/drm/i915/i915_sysfs.c (revision 14474950)
1 /*
2  * Copyright © 2012 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  * Authors:
24  *    Ben Widawsky <ben@bwidawsk.net>
25  *
26  */
27 
28 #include <linux/device.h>
29 #include <linux/module.h>
30 #include <linux/stat.h>
31 #include <linux/sysfs.h>
32 
33 #include "gt/intel_rc6.h"
34 #include "gt/intel_rps.h"
35 #include "gt/sysfs_engines.h"
36 
37 #include "i915_drv.h"
38 #include "i915_sysfs.h"
39 #include "intel_pm.h"
40 #include "intel_sideband.h"
41 
42 static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
43 {
44 	struct drm_minor *minor = dev_get_drvdata(kdev);
45 	return to_i915(minor->dev);
46 }
47 
48 #ifdef CONFIG_PM
49 static u32 calc_residency(struct drm_i915_private *dev_priv,
50 			  i915_reg_t reg)
51 {
52 	intel_wakeref_t wakeref;
53 	u64 res = 0;
54 
55 	with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref)
56 		res = intel_rc6_residency_us(&dev_priv->gt.rc6, reg);
57 
58 	return DIV_ROUND_CLOSEST_ULL(res, 1000);
59 }
60 
61 static ssize_t
62 show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf)
63 {
64 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
65 	unsigned int mask;
66 
67 	mask = 0;
68 	if (HAS_RC6(dev_priv))
69 		mask |= BIT(0);
70 	if (HAS_RC6p(dev_priv))
71 		mask |= BIT(1);
72 	if (HAS_RC6pp(dev_priv))
73 		mask |= BIT(2);
74 
75 	return snprintf(buf, PAGE_SIZE, "%x\n", mask);
76 }
77 
78 static ssize_t
79 show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf)
80 {
81 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
82 	u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6);
83 	return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency);
84 }
85 
86 static ssize_t
87 show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf)
88 {
89 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
90 	u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p);
91 	return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency);
92 }
93 
94 static ssize_t
95 show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf)
96 {
97 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
98 	u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp);
99 	return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency);
100 }
101 
102 static ssize_t
103 show_media_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf)
104 {
105 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
106 	u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6);
107 	return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency);
108 }
109 
110 static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
111 static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
112 static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
113 static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
114 static DEVICE_ATTR(media_rc6_residency_ms, S_IRUGO, show_media_rc6_ms, NULL);
115 
116 static struct attribute *rc6_attrs[] = {
117 	&dev_attr_rc6_enable.attr,
118 	&dev_attr_rc6_residency_ms.attr,
119 	NULL
120 };
121 
122 static const struct attribute_group rc6_attr_group = {
123 	.name = power_group_name,
124 	.attrs =  rc6_attrs
125 };
126 
127 static struct attribute *rc6p_attrs[] = {
128 	&dev_attr_rc6p_residency_ms.attr,
129 	&dev_attr_rc6pp_residency_ms.attr,
130 	NULL
131 };
132 
133 static const struct attribute_group rc6p_attr_group = {
134 	.name = power_group_name,
135 	.attrs =  rc6p_attrs
136 };
137 
138 static struct attribute *media_rc6_attrs[] = {
139 	&dev_attr_media_rc6_residency_ms.attr,
140 	NULL
141 };
142 
143 static const struct attribute_group media_rc6_attr_group = {
144 	.name = power_group_name,
145 	.attrs =  media_rc6_attrs
146 };
147 #endif
148 
149 static int l3_access_valid(struct drm_i915_private *i915, loff_t offset)
150 {
151 	if (!HAS_L3_DPF(i915))
152 		return -EPERM;
153 
154 	if (!IS_ALIGNED(offset, sizeof(u32)))
155 		return -EINVAL;
156 
157 	if (offset >= GEN7_L3LOG_SIZE)
158 		return -ENXIO;
159 
160 	return 0;
161 }
162 
163 static ssize_t
164 i915_l3_read(struct file *filp, struct kobject *kobj,
165 	     struct bin_attribute *attr, char *buf,
166 	     loff_t offset, size_t count)
167 {
168 	struct device *kdev = kobj_to_dev(kobj);
169 	struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
170 	int slice = (int)(uintptr_t)attr->private;
171 	int ret;
172 
173 	ret = l3_access_valid(i915, offset);
174 	if (ret)
175 		return ret;
176 
177 	count = round_down(count, sizeof(u32));
178 	count = min_t(size_t, GEN7_L3LOG_SIZE - offset, count);
179 	memset(buf, 0, count);
180 
181 	spin_lock(&i915->gem.contexts.lock);
182 	if (i915->l3_parity.remap_info[slice])
183 		memcpy(buf,
184 		       i915->l3_parity.remap_info[slice] + offset / sizeof(u32),
185 		       count);
186 	spin_unlock(&i915->gem.contexts.lock);
187 
188 	return count;
189 }
190 
191 static ssize_t
192 i915_l3_write(struct file *filp, struct kobject *kobj,
193 	      struct bin_attribute *attr, char *buf,
194 	      loff_t offset, size_t count)
195 {
196 	struct device *kdev = kobj_to_dev(kobj);
197 	struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
198 	int slice = (int)(uintptr_t)attr->private;
199 	u32 *remap_info, *freeme = NULL;
200 	struct i915_gem_context *ctx;
201 	int ret;
202 
203 	ret = l3_access_valid(i915, offset);
204 	if (ret)
205 		return ret;
206 
207 	if (count < sizeof(u32))
208 		return -EINVAL;
209 
210 	remap_info = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL);
211 	if (!remap_info)
212 		return -ENOMEM;
213 
214 	spin_lock(&i915->gem.contexts.lock);
215 
216 	if (i915->l3_parity.remap_info[slice]) {
217 		freeme = remap_info;
218 		remap_info = i915->l3_parity.remap_info[slice];
219 	} else {
220 		i915->l3_parity.remap_info[slice] = remap_info;
221 	}
222 
223 	count = round_down(count, sizeof(u32));
224 	memcpy(remap_info + offset / sizeof(u32), buf, count);
225 
226 	/* NB: We defer the remapping until we switch to the context */
227 	list_for_each_entry(ctx, &i915->gem.contexts.list, link)
228 		ctx->remap_slice |= BIT(slice);
229 
230 	spin_unlock(&i915->gem.contexts.lock);
231 	kfree(freeme);
232 
233 	/*
234 	 * TODO: Ideally we really want a GPU reset here to make sure errors
235 	 * aren't propagated. Since I cannot find a stable way to reset the GPU
236 	 * at this point it is left as a TODO.
237 	*/
238 
239 	return count;
240 }
241 
242 static const struct bin_attribute dpf_attrs = {
243 	.attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)},
244 	.size = GEN7_L3LOG_SIZE,
245 	.read = i915_l3_read,
246 	.write = i915_l3_write,
247 	.mmap = NULL,
248 	.private = (void *)0
249 };
250 
251 static const struct bin_attribute dpf_attrs_1 = {
252 	.attr = {.name = "l3_parity_slice_1", .mode = (S_IRUSR | S_IWUSR)},
253 	.size = GEN7_L3LOG_SIZE,
254 	.read = i915_l3_read,
255 	.write = i915_l3_write,
256 	.mmap = NULL,
257 	.private = (void *)1
258 };
259 
260 static ssize_t gt_act_freq_mhz_show(struct device *kdev,
261 				    struct device_attribute *attr, char *buf)
262 {
263 	struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
264 	struct intel_rps *rps = &i915->gt.rps;
265 
266 	return snprintf(buf, PAGE_SIZE, "%d\n",
267 			intel_rps_read_actual_frequency(rps));
268 }
269 
270 static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
271 				    struct device_attribute *attr, char *buf)
272 {
273 	struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
274 	struct intel_rps *rps = &i915->gt.rps;
275 
276 	return snprintf(buf, PAGE_SIZE, "%d\n",
277 			intel_gpu_freq(rps, rps->cur_freq));
278 }
279 
280 static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
281 {
282 	struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
283 	struct intel_rps *rps = &i915->gt.rps;
284 
285 	return snprintf(buf, PAGE_SIZE, "%d\n",
286 			intel_gpu_freq(rps, rps->boost_freq));
287 }
288 
289 static ssize_t gt_boost_freq_mhz_store(struct device *kdev,
290 				       struct device_attribute *attr,
291 				       const char *buf, size_t count)
292 {
293 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
294 	struct intel_rps *rps = &dev_priv->gt.rps;
295 	bool boost = false;
296 	ssize_t ret;
297 	u32 val;
298 
299 	ret = kstrtou32(buf, 0, &val);
300 	if (ret)
301 		return ret;
302 
303 	/* Validate against (static) hardware limits */
304 	val = intel_freq_opcode(rps, val);
305 	if (val < rps->min_freq || val > rps->max_freq)
306 		return -EINVAL;
307 
308 	mutex_lock(&rps->lock);
309 	if (val != rps->boost_freq) {
310 		rps->boost_freq = val;
311 		boost = atomic_read(&rps->num_waiters);
312 	}
313 	mutex_unlock(&rps->lock);
314 	if (boost)
315 		schedule_work(&rps->work);
316 
317 	return count;
318 }
319 
320 static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev,
321 				     struct device_attribute *attr, char *buf)
322 {
323 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
324 	struct intel_rps *rps = &dev_priv->gt.rps;
325 
326 	return snprintf(buf, PAGE_SIZE, "%d\n",
327 			intel_gpu_freq(rps, rps->efficient_freq));
328 }
329 
330 static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
331 {
332 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
333 	struct intel_rps *rps = &dev_priv->gt.rps;
334 
335 	return snprintf(buf, PAGE_SIZE, "%d\n",
336 			intel_gpu_freq(rps, rps->max_freq_softlimit));
337 }
338 
339 static ssize_t gt_max_freq_mhz_store(struct device *kdev,
340 				     struct device_attribute *attr,
341 				     const char *buf, size_t count)
342 {
343 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
344 	struct intel_rps *rps = &dev_priv->gt.rps;
345 	ssize_t ret;
346 	u32 val;
347 
348 	ret = kstrtou32(buf, 0, &val);
349 	if (ret)
350 		return ret;
351 
352 	mutex_lock(&rps->lock);
353 
354 	val = intel_freq_opcode(rps, val);
355 	if (val < rps->min_freq ||
356 	    val > rps->max_freq ||
357 	    val < rps->min_freq_softlimit) {
358 		ret = -EINVAL;
359 		goto unlock;
360 	}
361 
362 	if (val > rps->rp0_freq)
363 		DRM_DEBUG("User requested overclocking to %d\n",
364 			  intel_gpu_freq(rps, val));
365 
366 	rps->max_freq_softlimit = val;
367 
368 	val = clamp_t(int, rps->cur_freq,
369 		      rps->min_freq_softlimit,
370 		      rps->max_freq_softlimit);
371 
372 	/*
373 	 * We still need *_set_rps to process the new max_delay and
374 	 * update the interrupt limits and PMINTRMSK even though
375 	 * frequency request may be unchanged.
376 	 */
377 	intel_rps_set(rps, val);
378 
379 unlock:
380 	mutex_unlock(&rps->lock);
381 
382 	return ret ?: count;
383 }
384 
385 static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
386 {
387 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
388 	struct intel_rps *rps = &dev_priv->gt.rps;
389 
390 	return snprintf(buf, PAGE_SIZE, "%d\n",
391 			intel_gpu_freq(rps, rps->min_freq_softlimit));
392 }
393 
394 static ssize_t gt_min_freq_mhz_store(struct device *kdev,
395 				     struct device_attribute *attr,
396 				     const char *buf, size_t count)
397 {
398 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
399 	struct intel_rps *rps = &dev_priv->gt.rps;
400 	ssize_t ret;
401 	u32 val;
402 
403 	ret = kstrtou32(buf, 0, &val);
404 	if (ret)
405 		return ret;
406 
407 	mutex_lock(&rps->lock);
408 
409 	val = intel_freq_opcode(rps, val);
410 	if (val < rps->min_freq ||
411 	    val > rps->max_freq ||
412 	    val > rps->max_freq_softlimit) {
413 		ret = -EINVAL;
414 		goto unlock;
415 	}
416 
417 	rps->min_freq_softlimit = val;
418 
419 	val = clamp_t(int, rps->cur_freq,
420 		      rps->min_freq_softlimit,
421 		      rps->max_freq_softlimit);
422 
423 	/*
424 	 * We still need *_set_rps to process the new min_delay and
425 	 * update the interrupt limits and PMINTRMSK even though
426 	 * frequency request may be unchanged.
427 	 */
428 	intel_rps_set(rps, val);
429 
430 unlock:
431 	mutex_unlock(&rps->lock);
432 
433 	return ret ?: count;
434 }
435 
436 static DEVICE_ATTR_RO(gt_act_freq_mhz);
437 static DEVICE_ATTR_RO(gt_cur_freq_mhz);
438 static DEVICE_ATTR_RW(gt_boost_freq_mhz);
439 static DEVICE_ATTR_RW(gt_max_freq_mhz);
440 static DEVICE_ATTR_RW(gt_min_freq_mhz);
441 
442 static DEVICE_ATTR_RO(vlv_rpe_freq_mhz);
443 
444 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf);
445 static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
446 static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
447 static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
448 
449 /* For now we have a static number of RP states */
450 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
451 {
452 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
453 	struct intel_rps *rps = &dev_priv->gt.rps;
454 	u32 val;
455 
456 	if (attr == &dev_attr_gt_RP0_freq_mhz)
457 		val = intel_gpu_freq(rps, rps->rp0_freq);
458 	else if (attr == &dev_attr_gt_RP1_freq_mhz)
459 		val = intel_gpu_freq(rps, rps->rp1_freq);
460 	else if (attr == &dev_attr_gt_RPn_freq_mhz)
461 		val = intel_gpu_freq(rps, rps->min_freq);
462 	else
463 		BUG();
464 
465 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
466 }
467 
468 static const struct attribute * const gen6_attrs[] = {
469 	&dev_attr_gt_act_freq_mhz.attr,
470 	&dev_attr_gt_cur_freq_mhz.attr,
471 	&dev_attr_gt_boost_freq_mhz.attr,
472 	&dev_attr_gt_max_freq_mhz.attr,
473 	&dev_attr_gt_min_freq_mhz.attr,
474 	&dev_attr_gt_RP0_freq_mhz.attr,
475 	&dev_attr_gt_RP1_freq_mhz.attr,
476 	&dev_attr_gt_RPn_freq_mhz.attr,
477 	NULL,
478 };
479 
480 static const struct attribute * const vlv_attrs[] = {
481 	&dev_attr_gt_act_freq_mhz.attr,
482 	&dev_attr_gt_cur_freq_mhz.attr,
483 	&dev_attr_gt_boost_freq_mhz.attr,
484 	&dev_attr_gt_max_freq_mhz.attr,
485 	&dev_attr_gt_min_freq_mhz.attr,
486 	&dev_attr_gt_RP0_freq_mhz.attr,
487 	&dev_attr_gt_RP1_freq_mhz.attr,
488 	&dev_attr_gt_RPn_freq_mhz.attr,
489 	&dev_attr_vlv_rpe_freq_mhz.attr,
490 	NULL,
491 };
492 
493 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
494 
495 static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
496 				struct bin_attribute *attr, char *buf,
497 				loff_t off, size_t count)
498 {
499 
500 	struct device *kdev = kobj_to_dev(kobj);
501 	struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
502 	struct i915_gpu_coredump *gpu;
503 	ssize_t ret;
504 
505 	gpu = i915_first_error_state(i915);
506 	if (IS_ERR(gpu)) {
507 		ret = PTR_ERR(gpu);
508 	} else if (gpu) {
509 		ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count);
510 		i915_gpu_coredump_put(gpu);
511 	} else {
512 		const char *str = "No error state collected\n";
513 		size_t len = strlen(str);
514 
515 		ret = min_t(size_t, count, len - off);
516 		memcpy(buf, str + off, ret);
517 	}
518 
519 	return ret;
520 }
521 
522 static ssize_t error_state_write(struct file *file, struct kobject *kobj,
523 				 struct bin_attribute *attr, char *buf,
524 				 loff_t off, size_t count)
525 {
526 	struct device *kdev = kobj_to_dev(kobj);
527 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
528 
529 	drm_dbg(&dev_priv->drm, "Resetting error state\n");
530 	i915_reset_error_state(dev_priv);
531 
532 	return count;
533 }
534 
535 static const struct bin_attribute error_state_attr = {
536 	.attr.name = "error",
537 	.attr.mode = S_IRUSR | S_IWUSR,
538 	.size = 0,
539 	.read = error_state_read,
540 	.write = error_state_write,
541 };
542 
543 static void i915_setup_error_capture(struct device *kdev)
544 {
545 	if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr))
546 		DRM_ERROR("error_state sysfs setup failed\n");
547 }
548 
549 static void i915_teardown_error_capture(struct device *kdev)
550 {
551 	sysfs_remove_bin_file(&kdev->kobj, &error_state_attr);
552 }
553 #else
554 static void i915_setup_error_capture(struct device *kdev) {}
555 static void i915_teardown_error_capture(struct device *kdev) {}
556 #endif
557 
558 void i915_setup_sysfs(struct drm_i915_private *dev_priv)
559 {
560 	struct device *kdev = dev_priv->drm.primary->kdev;
561 	int ret;
562 
563 #ifdef CONFIG_PM
564 	if (HAS_RC6(dev_priv)) {
565 		ret = sysfs_merge_group(&kdev->kobj,
566 					&rc6_attr_group);
567 		if (ret)
568 			drm_err(&dev_priv->drm,
569 				"RC6 residency sysfs setup failed\n");
570 	}
571 	if (HAS_RC6p(dev_priv)) {
572 		ret = sysfs_merge_group(&kdev->kobj,
573 					&rc6p_attr_group);
574 		if (ret)
575 			drm_err(&dev_priv->drm,
576 				"RC6p residency sysfs setup failed\n");
577 	}
578 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
579 		ret = sysfs_merge_group(&kdev->kobj,
580 					&media_rc6_attr_group);
581 		if (ret)
582 			drm_err(&dev_priv->drm,
583 				"Media RC6 residency sysfs setup failed\n");
584 	}
585 #endif
586 	if (HAS_L3_DPF(dev_priv)) {
587 		ret = device_create_bin_file(kdev, &dpf_attrs);
588 		if (ret)
589 			drm_err(&dev_priv->drm,
590 				"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_err(&dev_priv->drm,
597 					"l3 parity slice 1 setup failed\n");
598 		}
599 	}
600 
601 	ret = 0;
602 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
603 		ret = sysfs_create_files(&kdev->kobj, vlv_attrs);
604 	else if (INTEL_GEN(dev_priv) >= 6)
605 		ret = sysfs_create_files(&kdev->kobj, gen6_attrs);
606 	if (ret)
607 		drm_err(&dev_priv->drm, "RPS sysfs setup failed\n");
608 
609 	i915_setup_error_capture(kdev);
610 
611 	intel_engines_add_sysfs(dev_priv);
612 }
613 
614 void i915_teardown_sysfs(struct drm_i915_private *dev_priv)
615 {
616 	struct device *kdev = dev_priv->drm.primary->kdev;
617 
618 	i915_teardown_error_capture(kdev);
619 
620 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
621 		sysfs_remove_files(&kdev->kobj, vlv_attrs);
622 	else
623 		sysfs_remove_files(&kdev->kobj, gen6_attrs);
624 	device_remove_bin_file(kdev,  &dpf_attrs_1);
625 	device_remove_bin_file(kdev,  &dpf_attrs);
626 #ifdef CONFIG_PM
627 	sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group);
628 	sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group);
629 #endif
630 }
631