1 /*
2  * Copyright © 2008 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  *    Eric Anholt <eric@anholt.net>
25  *    Keith Packard <keithp@keithp.com>
26  *
27  */
28 
29 #include <linux/sched/mm.h>
30 #include <linux/sort.h>
31 #include <linux/string_helpers.h>
32 
33 #include <drm/drm_debugfs.h>
34 
35 #include "gem/i915_gem_context.h"
36 #include "gt/intel_gt.h"
37 #include "gt/intel_gt_buffer_pool.h"
38 #include "gt/intel_gt_clock_utils.h"
39 #include "gt/intel_gt_debugfs.h"
40 #include "gt/intel_gt_pm.h"
41 #include "gt/intel_gt_pm_debugfs.h"
42 #include "gt/intel_gt_regs.h"
43 #include "gt/intel_gt_requests.h"
44 #include "gt/intel_rc6.h"
45 #include "gt/intel_reset.h"
46 #include "gt/intel_rps.h"
47 #include "gt/intel_sseu_debugfs.h"
48 
49 #include "i915_debugfs.h"
50 #include "i915_debugfs_params.h"
51 #include "i915_driver.h"
52 #include "i915_irq.h"
53 #include "i915_scheduler.h"
54 #include "intel_mchbar_regs.h"
55 #include "intel_pm.h"
56 
57 static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
58 {
59 	return to_i915(node->minor->dev);
60 }
61 
62 static int i915_capabilities(struct seq_file *m, void *data)
63 {
64 	struct drm_i915_private *i915 = node_to_i915(m->private);
65 	struct drm_printer p = drm_seq_file_printer(m);
66 
67 	seq_printf(m, "pch: %d\n", INTEL_PCH_TYPE(i915));
68 
69 	intel_device_info_print(INTEL_INFO(i915), RUNTIME_INFO(i915), &p);
70 	i915_print_iommu_status(i915, &p);
71 	intel_gt_info_print(&to_gt(i915)->info, &p);
72 	intel_driver_caps_print(&i915->caps, &p);
73 
74 	kernel_param_lock(THIS_MODULE);
75 	i915_params_dump(&i915->params, &p);
76 	kernel_param_unlock(THIS_MODULE);
77 
78 	return 0;
79 }
80 
81 static char get_tiling_flag(struct drm_i915_gem_object *obj)
82 {
83 	switch (i915_gem_object_get_tiling(obj)) {
84 	default:
85 	case I915_TILING_NONE: return ' ';
86 	case I915_TILING_X: return 'X';
87 	case I915_TILING_Y: return 'Y';
88 	}
89 }
90 
91 static char get_global_flag(struct drm_i915_gem_object *obj)
92 {
93 	return READ_ONCE(obj->userfault_count) ? 'g' : ' ';
94 }
95 
96 static char get_pin_mapped_flag(struct drm_i915_gem_object *obj)
97 {
98 	return obj->mm.mapping ? 'M' : ' ';
99 }
100 
101 static const char *
102 stringify_page_sizes(unsigned int page_sizes, char *buf, size_t len)
103 {
104 	size_t x = 0;
105 
106 	switch (page_sizes) {
107 	case 0:
108 		return "";
109 	case I915_GTT_PAGE_SIZE_4K:
110 		return "4K";
111 	case I915_GTT_PAGE_SIZE_64K:
112 		return "64K";
113 	case I915_GTT_PAGE_SIZE_2M:
114 		return "2M";
115 	default:
116 		if (!buf)
117 			return "M";
118 
119 		if (page_sizes & I915_GTT_PAGE_SIZE_2M)
120 			x += snprintf(buf + x, len - x, "2M, ");
121 		if (page_sizes & I915_GTT_PAGE_SIZE_64K)
122 			x += snprintf(buf + x, len - x, "64K, ");
123 		if (page_sizes & I915_GTT_PAGE_SIZE_4K)
124 			x += snprintf(buf + x, len - x, "4K, ");
125 		buf[x-2] = '\0';
126 
127 		return buf;
128 	}
129 }
130 
131 static const char *stringify_vma_type(const struct i915_vma *vma)
132 {
133 	if (i915_vma_is_ggtt(vma))
134 		return "ggtt";
135 
136 	if (i915_vma_is_dpt(vma))
137 		return "dpt";
138 
139 	return "ppgtt";
140 }
141 
142 static const char *i915_cache_level_str(struct drm_i915_private *i915, int type)
143 {
144 	switch (type) {
145 	case I915_CACHE_NONE: return " uncached";
146 	case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped";
147 	case I915_CACHE_L3_LLC: return " L3+LLC";
148 	case I915_CACHE_WT: return " WT";
149 	default: return "";
150 	}
151 }
152 
153 void
154 i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
155 {
156 	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
157 	struct i915_vma *vma;
158 	int pin_count = 0;
159 
160 	seq_printf(m, "%pK: %c%c%c %8zdKiB %02x %02x %s%s%s",
161 		   &obj->base,
162 		   get_tiling_flag(obj),
163 		   get_global_flag(obj),
164 		   get_pin_mapped_flag(obj),
165 		   obj->base.size / 1024,
166 		   obj->read_domains,
167 		   obj->write_domain,
168 		   i915_cache_level_str(dev_priv, obj->cache_level),
169 		   obj->mm.dirty ? " dirty" : "",
170 		   obj->mm.madv == I915_MADV_DONTNEED ? " purgeable" : "");
171 	if (obj->base.name)
172 		seq_printf(m, " (name: %d)", obj->base.name);
173 
174 	spin_lock(&obj->vma.lock);
175 	list_for_each_entry(vma, &obj->vma.list, obj_link) {
176 		if (!drm_mm_node_allocated(&vma->node))
177 			continue;
178 
179 		spin_unlock(&obj->vma.lock);
180 
181 		if (i915_vma_is_pinned(vma))
182 			pin_count++;
183 
184 		seq_printf(m, " (%s offset: %08llx, size: %08llx, pages: %s",
185 			   stringify_vma_type(vma),
186 			   vma->node.start, vma->node.size,
187 			   stringify_page_sizes(vma->resource->page_sizes_gtt,
188 						NULL, 0));
189 		if (i915_vma_is_ggtt(vma) || i915_vma_is_dpt(vma)) {
190 			switch (vma->gtt_view.type) {
191 			case I915_GTT_VIEW_NORMAL:
192 				seq_puts(m, ", normal");
193 				break;
194 
195 			case I915_GTT_VIEW_PARTIAL:
196 				seq_printf(m, ", partial [%08llx+%x]",
197 					   vma->gtt_view.partial.offset << PAGE_SHIFT,
198 					   vma->gtt_view.partial.size << PAGE_SHIFT);
199 				break;
200 
201 			case I915_GTT_VIEW_ROTATED:
202 				seq_printf(m, ", rotated [(%ux%u, src_stride=%u, dst_stride=%u, offset=%u), (%ux%u, src_stride=%u, dst_stride=%u, offset=%u)]",
203 					   vma->gtt_view.rotated.plane[0].width,
204 					   vma->gtt_view.rotated.plane[0].height,
205 					   vma->gtt_view.rotated.plane[0].src_stride,
206 					   vma->gtt_view.rotated.plane[0].dst_stride,
207 					   vma->gtt_view.rotated.plane[0].offset,
208 					   vma->gtt_view.rotated.plane[1].width,
209 					   vma->gtt_view.rotated.plane[1].height,
210 					   vma->gtt_view.rotated.plane[1].src_stride,
211 					   vma->gtt_view.rotated.plane[1].dst_stride,
212 					   vma->gtt_view.rotated.plane[1].offset);
213 				break;
214 
215 			case I915_GTT_VIEW_REMAPPED:
216 				seq_printf(m, ", remapped [(%ux%u, src_stride=%u, dst_stride=%u, offset=%u), (%ux%u, src_stride=%u, dst_stride=%u, offset=%u)]",
217 					   vma->gtt_view.remapped.plane[0].width,
218 					   vma->gtt_view.remapped.plane[0].height,
219 					   vma->gtt_view.remapped.plane[0].src_stride,
220 					   vma->gtt_view.remapped.plane[0].dst_stride,
221 					   vma->gtt_view.remapped.plane[0].offset,
222 					   vma->gtt_view.remapped.plane[1].width,
223 					   vma->gtt_view.remapped.plane[1].height,
224 					   vma->gtt_view.remapped.plane[1].src_stride,
225 					   vma->gtt_view.remapped.plane[1].dst_stride,
226 					   vma->gtt_view.remapped.plane[1].offset);
227 				break;
228 
229 			default:
230 				MISSING_CASE(vma->gtt_view.type);
231 				break;
232 			}
233 		}
234 		if (vma->fence)
235 			seq_printf(m, " , fence: %d", vma->fence->id);
236 		seq_puts(m, ")");
237 
238 		spin_lock(&obj->vma.lock);
239 	}
240 	spin_unlock(&obj->vma.lock);
241 
242 	seq_printf(m, " (pinned x %d)", pin_count);
243 	if (i915_gem_object_is_stolen(obj))
244 		seq_printf(m, " (stolen: %08llx)", obj->stolen->start);
245 	if (i915_gem_object_is_framebuffer(obj))
246 		seq_printf(m, " (fb)");
247 }
248 
249 static int i915_gem_object_info(struct seq_file *m, void *data)
250 {
251 	struct drm_i915_private *i915 = node_to_i915(m->private);
252 	struct drm_printer p = drm_seq_file_printer(m);
253 	struct intel_memory_region *mr;
254 	enum intel_region_id id;
255 
256 	seq_printf(m, "%u shrinkable [%u free] objects, %llu bytes\n",
257 		   i915->mm.shrink_count,
258 		   atomic_read(&i915->mm.free_count),
259 		   i915->mm.shrink_memory);
260 	for_each_memory_region(mr, i915, id)
261 		intel_memory_region_debug(mr, &p);
262 
263 	return 0;
264 }
265 
266 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
267 static ssize_t gpu_state_read(struct file *file, char __user *ubuf,
268 			      size_t count, loff_t *pos)
269 {
270 	struct i915_gpu_coredump *error;
271 	ssize_t ret;
272 	void *buf;
273 
274 	error = file->private_data;
275 	if (!error)
276 		return 0;
277 
278 	/* Bounce buffer required because of kernfs __user API convenience. */
279 	buf = kmalloc(count, GFP_KERNEL);
280 	if (!buf)
281 		return -ENOMEM;
282 
283 	ret = i915_gpu_coredump_copy_to_buffer(error, buf, *pos, count);
284 	if (ret <= 0)
285 		goto out;
286 
287 	if (!copy_to_user(ubuf, buf, ret))
288 		*pos += ret;
289 	else
290 		ret = -EFAULT;
291 
292 out:
293 	kfree(buf);
294 	return ret;
295 }
296 
297 static int gpu_state_release(struct inode *inode, struct file *file)
298 {
299 	i915_gpu_coredump_put(file->private_data);
300 	return 0;
301 }
302 
303 static int i915_gpu_info_open(struct inode *inode, struct file *file)
304 {
305 	struct drm_i915_private *i915 = inode->i_private;
306 	struct i915_gpu_coredump *gpu;
307 	intel_wakeref_t wakeref;
308 
309 	gpu = NULL;
310 	with_intel_runtime_pm(&i915->runtime_pm, wakeref)
311 		gpu = i915_gpu_coredump(to_gt(i915), ALL_ENGINES, CORE_DUMP_FLAG_NONE);
312 
313 	if (IS_ERR(gpu))
314 		return PTR_ERR(gpu);
315 
316 	file->private_data = gpu;
317 	return 0;
318 }
319 
320 static const struct file_operations i915_gpu_info_fops = {
321 	.owner = THIS_MODULE,
322 	.open = i915_gpu_info_open,
323 	.read = gpu_state_read,
324 	.llseek = default_llseek,
325 	.release = gpu_state_release,
326 };
327 
328 static ssize_t
329 i915_error_state_write(struct file *filp,
330 		       const char __user *ubuf,
331 		       size_t cnt,
332 		       loff_t *ppos)
333 {
334 	struct i915_gpu_coredump *error = filp->private_data;
335 
336 	if (!error)
337 		return 0;
338 
339 	drm_dbg(&error->i915->drm, "Resetting error state\n");
340 	i915_reset_error_state(error->i915);
341 
342 	return cnt;
343 }
344 
345 static int i915_error_state_open(struct inode *inode, struct file *file)
346 {
347 	struct i915_gpu_coredump *error;
348 
349 	error = i915_first_error_state(inode->i_private);
350 	if (IS_ERR(error))
351 		return PTR_ERR(error);
352 
353 	file->private_data  = error;
354 	return 0;
355 }
356 
357 static const struct file_operations i915_error_state_fops = {
358 	.owner = THIS_MODULE,
359 	.open = i915_error_state_open,
360 	.read = gpu_state_read,
361 	.write = i915_error_state_write,
362 	.llseek = default_llseek,
363 	.release = gpu_state_release,
364 };
365 #endif
366 
367 static int i915_frequency_info(struct seq_file *m, void *unused)
368 {
369 	struct drm_i915_private *i915 = node_to_i915(m->private);
370 	struct intel_gt *gt = to_gt(i915);
371 	struct drm_printer p = drm_seq_file_printer(m);
372 
373 	intel_gt_pm_frequency_dump(gt, &p);
374 
375 	return 0;
376 }
377 
378 static const char *swizzle_string(unsigned swizzle)
379 {
380 	switch (swizzle) {
381 	case I915_BIT_6_SWIZZLE_NONE:
382 		return "none";
383 	case I915_BIT_6_SWIZZLE_9:
384 		return "bit9";
385 	case I915_BIT_6_SWIZZLE_9_10:
386 		return "bit9/bit10";
387 	case I915_BIT_6_SWIZZLE_9_11:
388 		return "bit9/bit11";
389 	case I915_BIT_6_SWIZZLE_9_10_11:
390 		return "bit9/bit10/bit11";
391 	case I915_BIT_6_SWIZZLE_9_17:
392 		return "bit9/bit17";
393 	case I915_BIT_6_SWIZZLE_9_10_17:
394 		return "bit9/bit10/bit17";
395 	case I915_BIT_6_SWIZZLE_UNKNOWN:
396 		return "unknown";
397 	}
398 
399 	return "bug";
400 }
401 
402 static int i915_swizzle_info(struct seq_file *m, void *data)
403 {
404 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
405 	struct intel_uncore *uncore = &dev_priv->uncore;
406 	intel_wakeref_t wakeref;
407 
408 	seq_printf(m, "bit6 swizzle for X-tiling = %s\n",
409 		   swizzle_string(to_gt(dev_priv)->ggtt->bit_6_swizzle_x));
410 	seq_printf(m, "bit6 swizzle for Y-tiling = %s\n",
411 		   swizzle_string(to_gt(dev_priv)->ggtt->bit_6_swizzle_y));
412 
413 	if (dev_priv->gem_quirks & GEM_QUIRK_PIN_SWIZZLED_PAGES)
414 		seq_puts(m, "L-shaped memory detected\n");
415 
416 	/* On BDW+, swizzling is not used. See detect_bit_6_swizzle() */
417 	if (GRAPHICS_VER(dev_priv) >= 8 || IS_VALLEYVIEW(dev_priv))
418 		return 0;
419 
420 	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
421 
422 	if (IS_GRAPHICS_VER(dev_priv, 3, 4)) {
423 		seq_printf(m, "DDC = 0x%08x\n",
424 			   intel_uncore_read(uncore, DCC));
425 		seq_printf(m, "DDC2 = 0x%08x\n",
426 			   intel_uncore_read(uncore, DCC2));
427 		seq_printf(m, "C0DRB3 = 0x%04x\n",
428 			   intel_uncore_read16(uncore, C0DRB3_BW));
429 		seq_printf(m, "C1DRB3 = 0x%04x\n",
430 			   intel_uncore_read16(uncore, C1DRB3_BW));
431 	} else if (GRAPHICS_VER(dev_priv) >= 6) {
432 		seq_printf(m, "MAD_DIMM_C0 = 0x%08x\n",
433 			   intel_uncore_read(uncore, MAD_DIMM_C0));
434 		seq_printf(m, "MAD_DIMM_C1 = 0x%08x\n",
435 			   intel_uncore_read(uncore, MAD_DIMM_C1));
436 		seq_printf(m, "MAD_DIMM_C2 = 0x%08x\n",
437 			   intel_uncore_read(uncore, MAD_DIMM_C2));
438 		seq_printf(m, "TILECTL = 0x%08x\n",
439 			   intel_uncore_read(uncore, TILECTL));
440 		if (GRAPHICS_VER(dev_priv) >= 8)
441 			seq_printf(m, "GAMTARBMODE = 0x%08x\n",
442 				   intel_uncore_read(uncore, GAMTARBMODE));
443 		else
444 			seq_printf(m, "ARB_MODE = 0x%08x\n",
445 				   intel_uncore_read(uncore, ARB_MODE));
446 		seq_printf(m, "DISP_ARB_CTL = 0x%08x\n",
447 			   intel_uncore_read(uncore, DISP_ARB_CTL));
448 	}
449 
450 	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
451 
452 	return 0;
453 }
454 
455 static int i915_rps_boost_info(struct seq_file *m, void *data)
456 {
457 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
458 	struct intel_rps *rps = &to_gt(dev_priv)->rps;
459 
460 	seq_printf(m, "RPS enabled? %s\n",
461 		   str_yes_no(intel_rps_is_enabled(rps)));
462 	seq_printf(m, "RPS active? %s\n",
463 		   str_yes_no(intel_rps_is_active(rps)));
464 	seq_printf(m, "GPU busy? %s\n", str_yes_no(to_gt(dev_priv)->awake));
465 	seq_printf(m, "Boosts outstanding? %d\n",
466 		   atomic_read(&rps->num_waiters));
467 	seq_printf(m, "Interactive? %d\n", READ_ONCE(rps->power.interactive));
468 	seq_printf(m, "Frequency requested %d, actual %d\n",
469 		   intel_gpu_freq(rps, rps->cur_freq),
470 		   intel_rps_read_actual_frequency(rps));
471 	seq_printf(m, "  min hard:%d, soft:%d; max soft:%d, hard:%d\n",
472 		   intel_gpu_freq(rps, rps->min_freq),
473 		   intel_gpu_freq(rps, rps->min_freq_softlimit),
474 		   intel_gpu_freq(rps, rps->max_freq_softlimit),
475 		   intel_gpu_freq(rps, rps->max_freq));
476 	seq_printf(m, "  idle:%d, efficient:%d, boost:%d\n",
477 		   intel_gpu_freq(rps, rps->idle_freq),
478 		   intel_gpu_freq(rps, rps->efficient_freq),
479 		   intel_gpu_freq(rps, rps->boost_freq));
480 
481 	seq_printf(m, "Wait boosts: %d\n", READ_ONCE(rps->boosts));
482 
483 	return 0;
484 }
485 
486 static int i915_runtime_pm_status(struct seq_file *m, void *unused)
487 {
488 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
489 	struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
490 
491 	if (!HAS_RUNTIME_PM(dev_priv))
492 		seq_puts(m, "Runtime power management not supported\n");
493 
494 	seq_printf(m, "Runtime power status: %s\n",
495 		   str_enabled_disabled(!dev_priv->display.power.domains.init_wakeref));
496 
497 	seq_printf(m, "GPU idle: %s\n", str_yes_no(!to_gt(dev_priv)->awake));
498 	seq_printf(m, "IRQs disabled: %s\n",
499 		   str_yes_no(!intel_irqs_enabled(dev_priv)));
500 #ifdef CONFIG_PM
501 	seq_printf(m, "Usage count: %d\n",
502 		   atomic_read(&dev_priv->drm.dev->power.usage_count));
503 #else
504 	seq_printf(m, "Device Power Management (CONFIG_PM) disabled\n");
505 #endif
506 	seq_printf(m, "PCI device power state: %s [%d]\n",
507 		   pci_power_name(pdev->current_state),
508 		   pdev->current_state);
509 
510 	if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)) {
511 		struct drm_printer p = drm_seq_file_printer(m);
512 
513 		print_intel_runtime_pm_wakeref(&dev_priv->runtime_pm, &p);
514 	}
515 
516 	return 0;
517 }
518 
519 static int i915_engine_info(struct seq_file *m, void *unused)
520 {
521 	struct drm_i915_private *i915 = node_to_i915(m->private);
522 	struct intel_engine_cs *engine;
523 	intel_wakeref_t wakeref;
524 	struct drm_printer p;
525 
526 	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
527 
528 	seq_printf(m, "GT awake? %s [%d], %llums\n",
529 		   str_yes_no(to_gt(i915)->awake),
530 		   atomic_read(&to_gt(i915)->wakeref.count),
531 		   ktime_to_ms(intel_gt_get_awake_time(to_gt(i915))));
532 	seq_printf(m, "CS timestamp frequency: %u Hz, %d ns\n",
533 		   to_gt(i915)->clock_frequency,
534 		   to_gt(i915)->clock_period_ns);
535 
536 	p = drm_seq_file_printer(m);
537 	for_each_uabi_engine(engine, i915)
538 		intel_engine_dump(engine, &p, "%s\n", engine->name);
539 
540 	intel_gt_show_timelines(to_gt(i915), &p, i915_request_show_with_schedule);
541 
542 	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
543 
544 	return 0;
545 }
546 
547 static int i915_wa_registers(struct seq_file *m, void *unused)
548 {
549 	struct drm_i915_private *i915 = node_to_i915(m->private);
550 	struct intel_engine_cs *engine;
551 
552 	for_each_uabi_engine(engine, i915) {
553 		const struct i915_wa_list *wal = &engine->ctx_wa_list;
554 		const struct i915_wa *wa;
555 		unsigned int count;
556 
557 		count = wal->count;
558 		if (!count)
559 			continue;
560 
561 		seq_printf(m, "%s: Workarounds applied: %u\n",
562 			   engine->name, count);
563 
564 		for (wa = wal->list; count--; wa++)
565 			seq_printf(m, "0x%X: 0x%08X, mask: 0x%08X\n",
566 				   i915_mmio_reg_offset(wa->reg),
567 				   wa->set, wa->clr);
568 
569 		seq_printf(m, "\n");
570 	}
571 
572 	return 0;
573 }
574 
575 static int i915_wedged_get(void *data, u64 *val)
576 {
577 	struct drm_i915_private *i915 = data;
578 
579 	return intel_gt_debugfs_reset_show(to_gt(i915), val);
580 }
581 
582 static int i915_wedged_set(void *data, u64 val)
583 {
584 	struct drm_i915_private *i915 = data;
585 	intel_gt_debugfs_reset_store(to_gt(i915), val);
586 
587 	return 0;
588 }
589 
590 DEFINE_SIMPLE_ATTRIBUTE(i915_wedged_fops,
591 			i915_wedged_get, i915_wedged_set,
592 			"%llu\n");
593 
594 static int
595 i915_perf_noa_delay_set(void *data, u64 val)
596 {
597 	struct drm_i915_private *i915 = data;
598 
599 	/*
600 	 * This would lead to infinite waits as we're doing timestamp
601 	 * difference on the CS with only 32bits.
602 	 */
603 	if (intel_gt_ns_to_clock_interval(to_gt(i915), val) > U32_MAX)
604 		return -EINVAL;
605 
606 	atomic64_set(&i915->perf.noa_programming_delay, val);
607 	return 0;
608 }
609 
610 static int
611 i915_perf_noa_delay_get(void *data, u64 *val)
612 {
613 	struct drm_i915_private *i915 = data;
614 
615 	*val = atomic64_read(&i915->perf.noa_programming_delay);
616 	return 0;
617 }
618 
619 DEFINE_SIMPLE_ATTRIBUTE(i915_perf_noa_delay_fops,
620 			i915_perf_noa_delay_get,
621 			i915_perf_noa_delay_set,
622 			"%llu\n");
623 
624 #define DROP_UNBOUND	BIT(0)
625 #define DROP_BOUND	BIT(1)
626 #define DROP_RETIRE	BIT(2)
627 #define DROP_ACTIVE	BIT(3)
628 #define DROP_FREED	BIT(4)
629 #define DROP_SHRINK_ALL	BIT(5)
630 #define DROP_IDLE	BIT(6)
631 #define DROP_RESET_ACTIVE	BIT(7)
632 #define DROP_RESET_SEQNO	BIT(8)
633 #define DROP_RCU	BIT(9)
634 #define DROP_ALL (DROP_UNBOUND	| \
635 		  DROP_BOUND	| \
636 		  DROP_RETIRE	| \
637 		  DROP_ACTIVE	| \
638 		  DROP_FREED	| \
639 		  DROP_SHRINK_ALL |\
640 		  DROP_IDLE	| \
641 		  DROP_RESET_ACTIVE | \
642 		  DROP_RESET_SEQNO | \
643 		  DROP_RCU)
644 static int
645 i915_drop_caches_get(void *data, u64 *val)
646 {
647 	*val = DROP_ALL;
648 
649 	return 0;
650 }
651 static int
652 gt_drop_caches(struct intel_gt *gt, u64 val)
653 {
654 	int ret;
655 
656 	if (val & DROP_RESET_ACTIVE &&
657 	    wait_for(intel_engines_are_idle(gt), I915_IDLE_ENGINES_TIMEOUT))
658 		intel_gt_set_wedged(gt);
659 
660 	if (val & DROP_RETIRE)
661 		intel_gt_retire_requests(gt);
662 
663 	if (val & (DROP_IDLE | DROP_ACTIVE)) {
664 		ret = intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
665 		if (ret)
666 			return ret;
667 	}
668 
669 	if (val & DROP_IDLE) {
670 		ret = intel_gt_pm_wait_for_idle(gt);
671 		if (ret)
672 			return ret;
673 	}
674 
675 	if (val & DROP_RESET_ACTIVE && intel_gt_terminally_wedged(gt))
676 		intel_gt_handle_error(gt, ALL_ENGINES, 0, NULL);
677 
678 	if (val & DROP_FREED)
679 		intel_gt_flush_buffer_pool(gt);
680 
681 	return 0;
682 }
683 
684 static int
685 i915_drop_caches_set(void *data, u64 val)
686 {
687 	struct drm_i915_private *i915 = data;
688 	unsigned int flags;
689 	int ret;
690 
691 	DRM_DEBUG("Dropping caches: 0x%08llx [0x%08llx]\n",
692 		  val, val & DROP_ALL);
693 
694 	ret = gt_drop_caches(to_gt(i915), val);
695 	if (ret)
696 		return ret;
697 
698 	fs_reclaim_acquire(GFP_KERNEL);
699 	flags = memalloc_noreclaim_save();
700 	if (val & DROP_BOUND)
701 		i915_gem_shrink(NULL, i915, LONG_MAX, NULL, I915_SHRINK_BOUND);
702 
703 	if (val & DROP_UNBOUND)
704 		i915_gem_shrink(NULL, i915, LONG_MAX, NULL, I915_SHRINK_UNBOUND);
705 
706 	if (val & DROP_SHRINK_ALL)
707 		i915_gem_shrink_all(i915);
708 	memalloc_noreclaim_restore(flags);
709 	fs_reclaim_release(GFP_KERNEL);
710 
711 	if (val & DROP_RCU)
712 		rcu_barrier();
713 
714 	if (val & DROP_FREED)
715 		i915_gem_drain_freed_objects(i915);
716 
717 	return 0;
718 }
719 
720 DEFINE_SIMPLE_ATTRIBUTE(i915_drop_caches_fops,
721 			i915_drop_caches_get, i915_drop_caches_set,
722 			"0x%08llx\n");
723 
724 static int i915_sseu_status(struct seq_file *m, void *unused)
725 {
726 	struct drm_i915_private *i915 = node_to_i915(m->private);
727 	struct intel_gt *gt = to_gt(i915);
728 
729 	return intel_sseu_status(m, gt);
730 }
731 
732 static int i915_forcewake_open(struct inode *inode, struct file *file)
733 {
734 	struct drm_i915_private *i915 = inode->i_private;
735 	intel_gt_pm_debugfs_forcewake_user_open(to_gt(i915));
736 
737 	return 0;
738 }
739 
740 static int i915_forcewake_release(struct inode *inode, struct file *file)
741 {
742 	struct drm_i915_private *i915 = inode->i_private;
743 	intel_gt_pm_debugfs_forcewake_user_release(to_gt(i915));
744 
745 	return 0;
746 }
747 
748 static const struct file_operations i915_forcewake_fops = {
749 	.owner = THIS_MODULE,
750 	.open = i915_forcewake_open,
751 	.release = i915_forcewake_release,
752 };
753 
754 static const struct drm_info_list i915_debugfs_list[] = {
755 	{"i915_capabilities", i915_capabilities, 0},
756 	{"i915_gem_objects", i915_gem_object_info, 0},
757 	{"i915_frequency_info", i915_frequency_info, 0},
758 	{"i915_swizzle_info", i915_swizzle_info, 0},
759 	{"i915_runtime_pm_status", i915_runtime_pm_status, 0},
760 	{"i915_engine_info", i915_engine_info, 0},
761 	{"i915_wa_registers", i915_wa_registers, 0},
762 	{"i915_sseu_status", i915_sseu_status, 0},
763 	{"i915_rps_boost_info", i915_rps_boost_info, 0},
764 };
765 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
766 
767 static const struct i915_debugfs_files {
768 	const char *name;
769 	const struct file_operations *fops;
770 } i915_debugfs_files[] = {
771 	{"i915_perf_noa_delay", &i915_perf_noa_delay_fops},
772 	{"i915_wedged", &i915_wedged_fops},
773 	{"i915_gem_drop_caches", &i915_drop_caches_fops},
774 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
775 	{"i915_error_state", &i915_error_state_fops},
776 	{"i915_gpu_info", &i915_gpu_info_fops},
777 #endif
778 };
779 
780 void i915_debugfs_register(struct drm_i915_private *dev_priv)
781 {
782 	struct drm_minor *minor = dev_priv->drm.primary;
783 	int i;
784 
785 	i915_debugfs_params(dev_priv);
786 
787 	debugfs_create_file("i915_forcewake_user", S_IRUSR, minor->debugfs_root,
788 			    to_i915(minor->dev), &i915_forcewake_fops);
789 	for (i = 0; i < ARRAY_SIZE(i915_debugfs_files); i++) {
790 		debugfs_create_file(i915_debugfs_files[i].name,
791 				    S_IRUGO | S_IWUSR,
792 				    minor->debugfs_root,
793 				    to_i915(minor->dev),
794 				    i915_debugfs_files[i].fops);
795 	}
796 
797 	drm_debugfs_create_files(i915_debugfs_list,
798 				 I915_DEBUGFS_ENTRIES,
799 				 minor->debugfs_root, minor);
800 }
801