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_reg.h"
54#include "i915_scheduler.h"
55#include "intel_mchbar_regs.h"
56
57static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
58{
59 return to_i915(dev: node->minor->dev);
60}
61
62static int i915_capabilities(struct seq_file *m, void *data)
63{
64 struct drm_i915_private *i915 = node_to_i915(node: m->private);
65 struct drm_printer p = drm_seq_file_printer(f: m);
66
67 seq_printf(m, fmt: "pch: %d\n", INTEL_PCH_TYPE(i915));
68
69 intel_device_info_print(INTEL_INFO(i915), RUNTIME_INFO(i915), p: &p);
70 intel_display_device_info_print(DISPLAY_INFO(i915), DISPLAY_RUNTIME_INFO(i915), p: &p);
71 i915_print_iommu_status(i915, p: &p);
72 intel_gt_info_print(info: &to_gt(i915)->info, p: &p);
73 intel_driver_caps_print(caps: &i915->caps, p: &p);
74
75 kernel_param_lock(THIS_MODULE);
76 i915_params_dump(params: &i915->params, p: &p);
77 kernel_param_unlock(THIS_MODULE);
78
79 return 0;
80}
81
82static char get_tiling_flag(struct drm_i915_gem_object *obj)
83{
84 switch (i915_gem_object_get_tiling(obj)) {
85 default:
86 case I915_TILING_NONE: return ' ';
87 case I915_TILING_X: return 'X';
88 case I915_TILING_Y: return 'Y';
89 }
90}
91
92static char get_global_flag(struct drm_i915_gem_object *obj)
93{
94 return READ_ONCE(obj->userfault_count) ? 'g' : ' ';
95}
96
97static char get_pin_mapped_flag(struct drm_i915_gem_object *obj)
98{
99 return obj->mm.mapping ? 'M' : ' ';
100}
101
102static const char *
103stringify_page_sizes(unsigned int page_sizes, char *buf, size_t len)
104{
105 size_t x = 0;
106
107 switch (page_sizes) {
108 case 0:
109 return "";
110 case I915_GTT_PAGE_SIZE_4K:
111 return "4K";
112 case I915_GTT_PAGE_SIZE_64K:
113 return "64K";
114 case I915_GTT_PAGE_SIZE_2M:
115 return "2M";
116 default:
117 if (!buf)
118 return "M";
119
120 if (page_sizes & I915_GTT_PAGE_SIZE_2M)
121 x += snprintf(buf: buf + x, size: len - x, fmt: "2M, ");
122 if (page_sizes & I915_GTT_PAGE_SIZE_64K)
123 x += snprintf(buf: buf + x, size: len - x, fmt: "64K, ");
124 if (page_sizes & I915_GTT_PAGE_SIZE_4K)
125 x += snprintf(buf: buf + x, size: len - x, fmt: "4K, ");
126 buf[x-2] = '\0';
127
128 return buf;
129 }
130}
131
132static const char *stringify_vma_type(const struct i915_vma *vma)
133{
134 if (i915_vma_is_ggtt(vma))
135 return "ggtt";
136
137 if (i915_vma_is_dpt(vma))
138 return "dpt";
139
140 return "ppgtt";
141}
142
143static const char *i915_cache_level_str(struct drm_i915_gem_object *obj)
144{
145 struct drm_i915_private *i915 = obj_to_i915(obj);
146
147 if (IS_GFX_GT_IP_RANGE(to_gt(i915), IP_VER(12, 70), IP_VER(12, 71))) {
148 switch (obj->pat_index) {
149 case 0: return " WB";
150 case 1: return " WT";
151 case 2: return " UC";
152 case 3: return " WB (1-Way Coh)";
153 case 4: return " WB (2-Way Coh)";
154 default: return " not defined";
155 }
156 } else if (IS_PONTEVECCHIO(i915)) {
157 switch (obj->pat_index) {
158 case 0: return " UC";
159 case 1: return " WC";
160 case 2: return " WT";
161 case 3: return " WB";
162 case 4: return " WT (CLOS1)";
163 case 5: return " WB (CLOS1)";
164 case 6: return " WT (CLOS2)";
165 case 7: return " WT (CLOS2)";
166 default: return " not defined";
167 }
168 } else if (GRAPHICS_VER(i915) >= 12) {
169 switch (obj->pat_index) {
170 case 0: return " WB";
171 case 1: return " WC";
172 case 2: return " WT";
173 case 3: return " UC";
174 default: return " not defined";
175 }
176 } else {
177 switch (obj->pat_index) {
178 case 0: return " UC";
179 case 1: return HAS_LLC(i915) ?
180 " LLC" : " snooped";
181 case 2: return " L3+LLC";
182 case 3: return " WT";
183 default: return " not defined";
184 }
185 }
186}
187
188void
189i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
190{
191 struct i915_vma *vma;
192 int pin_count = 0;
193
194 seq_printf(m, fmt: "%pK: %c%c%c %8zdKiB %02x %02x %s%s%s",
195 &obj->base,
196 get_tiling_flag(obj),
197 get_global_flag(obj),
198 get_pin_mapped_flag(obj),
199 obj->base.size / 1024,
200 obj->read_domains,
201 obj->write_domain,
202 i915_cache_level_str(obj),
203 obj->mm.dirty ? " dirty" : "",
204 obj->mm.madv == I915_MADV_DONTNEED ? " purgeable" : "");
205 if (obj->base.name)
206 seq_printf(m, fmt: " (name: %d)", obj->base.name);
207
208 spin_lock(lock: &obj->vma.lock);
209 list_for_each_entry(vma, &obj->vma.list, obj_link) {
210 if (!drm_mm_node_allocated(node: &vma->node))
211 continue;
212
213 spin_unlock(lock: &obj->vma.lock);
214
215 if (i915_vma_is_pinned(vma))
216 pin_count++;
217
218 seq_printf(m, fmt: " (%s offset: %08llx, size: %08llx, pages: %s",
219 stringify_vma_type(vma),
220 i915_vma_offset(vma), i915_vma_size(vma),
221 stringify_page_sizes(page_sizes: vma->resource->page_sizes_gtt,
222 NULL, len: 0));
223 if (i915_vma_is_ggtt(vma) || i915_vma_is_dpt(vma)) {
224 switch (vma->gtt_view.type) {
225 case I915_GTT_VIEW_NORMAL:
226 seq_puts(m, s: ", normal");
227 break;
228
229 case I915_GTT_VIEW_PARTIAL:
230 seq_printf(m, fmt: ", partial [%08llx+%x]",
231 vma->gtt_view.partial.offset << PAGE_SHIFT,
232 vma->gtt_view.partial.size << PAGE_SHIFT);
233 break;
234
235 case I915_GTT_VIEW_ROTATED:
236 seq_printf(m, fmt: ", rotated [(%ux%u, src_stride=%u, dst_stride=%u, offset=%u), (%ux%u, src_stride=%u, dst_stride=%u, offset=%u)]",
237 vma->gtt_view.rotated.plane[0].width,
238 vma->gtt_view.rotated.plane[0].height,
239 vma->gtt_view.rotated.plane[0].src_stride,
240 vma->gtt_view.rotated.plane[0].dst_stride,
241 vma->gtt_view.rotated.plane[0].offset,
242 vma->gtt_view.rotated.plane[1].width,
243 vma->gtt_view.rotated.plane[1].height,
244 vma->gtt_view.rotated.plane[1].src_stride,
245 vma->gtt_view.rotated.plane[1].dst_stride,
246 vma->gtt_view.rotated.plane[1].offset);
247 break;
248
249 case I915_GTT_VIEW_REMAPPED:
250 seq_printf(m, fmt: ", remapped [(%ux%u, src_stride=%u, dst_stride=%u, offset=%u), (%ux%u, src_stride=%u, dst_stride=%u, offset=%u)]",
251 vma->gtt_view.remapped.plane[0].width,
252 vma->gtt_view.remapped.plane[0].height,
253 vma->gtt_view.remapped.plane[0].src_stride,
254 vma->gtt_view.remapped.plane[0].dst_stride,
255 vma->gtt_view.remapped.plane[0].offset,
256 vma->gtt_view.remapped.plane[1].width,
257 vma->gtt_view.remapped.plane[1].height,
258 vma->gtt_view.remapped.plane[1].src_stride,
259 vma->gtt_view.remapped.plane[1].dst_stride,
260 vma->gtt_view.remapped.plane[1].offset);
261 break;
262
263 default:
264 MISSING_CASE(vma->gtt_view.type);
265 break;
266 }
267 }
268 if (vma->fence)
269 seq_printf(m, fmt: " , fence: %d", vma->fence->id);
270 seq_puts(m, s: ")");
271
272 spin_lock(lock: &obj->vma.lock);
273 }
274 spin_unlock(lock: &obj->vma.lock);
275
276 seq_printf(m, fmt: " (pinned x %d)", pin_count);
277 if (i915_gem_object_is_stolen(obj))
278 seq_printf(m, fmt: " (stolen: %08llx)", obj->stolen->start);
279 if (i915_gem_object_is_framebuffer(obj))
280 seq_printf(m, fmt: " (fb)");
281}
282
283static int i915_gem_object_info(struct seq_file *m, void *data)
284{
285 struct drm_i915_private *i915 = node_to_i915(node: m->private);
286 struct drm_printer p = drm_seq_file_printer(f: m);
287 struct intel_memory_region *mr;
288 enum intel_region_id id;
289
290 seq_printf(m, fmt: "%u shrinkable [%u free] objects, %llu bytes\n",
291 i915->mm.shrink_count,
292 atomic_read(v: &i915->mm.free_count),
293 i915->mm.shrink_memory);
294 for_each_memory_region(mr, i915, id)
295 intel_memory_region_debug(mr, printer: &p);
296
297 return 0;
298}
299
300#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
301static ssize_t gpu_state_read(struct file *file, char __user *ubuf,
302 size_t count, loff_t *pos)
303{
304 struct i915_gpu_coredump *error;
305 ssize_t ret;
306 void *buf;
307
308 error = file->private_data;
309 if (!error)
310 return 0;
311
312 /* Bounce buffer required because of kernfs __user API convenience. */
313 buf = kmalloc(size: count, GFP_KERNEL);
314 if (!buf)
315 return -ENOMEM;
316
317 ret = i915_gpu_coredump_copy_to_buffer(error, buf, offset: *pos, count);
318 if (ret <= 0)
319 goto out;
320
321 if (!copy_to_user(to: ubuf, from: buf, n: ret))
322 *pos += ret;
323 else
324 ret = -EFAULT;
325
326out:
327 kfree(objp: buf);
328 return ret;
329}
330
331static int gpu_state_release(struct inode *inode, struct file *file)
332{
333 i915_gpu_coredump_put(gpu: file->private_data);
334 return 0;
335}
336
337static int i915_gpu_info_open(struct inode *inode, struct file *file)
338{
339 struct drm_i915_private *i915 = inode->i_private;
340 struct i915_gpu_coredump *gpu;
341 intel_wakeref_t wakeref;
342
343 gpu = NULL;
344 with_intel_runtime_pm(&i915->runtime_pm, wakeref)
345 gpu = i915_gpu_coredump(gt: to_gt(i915), ALL_ENGINES, CORE_DUMP_FLAG_NONE);
346
347 if (IS_ERR(ptr: gpu))
348 return PTR_ERR(ptr: gpu);
349
350 file->private_data = gpu;
351 return 0;
352}
353
354static const struct file_operations i915_gpu_info_fops = {
355 .owner = THIS_MODULE,
356 .open = i915_gpu_info_open,
357 .read = gpu_state_read,
358 .llseek = default_llseek,
359 .release = gpu_state_release,
360};
361
362static ssize_t
363i915_error_state_write(struct file *filp,
364 const char __user *ubuf,
365 size_t cnt,
366 loff_t *ppos)
367{
368 struct i915_gpu_coredump *error = filp->private_data;
369
370 if (!error)
371 return 0;
372
373 drm_dbg(&error->i915->drm, "Resetting error state\n");
374 i915_reset_error_state(i915: error->i915);
375
376 return cnt;
377}
378
379static int i915_error_state_open(struct inode *inode, struct file *file)
380{
381 struct i915_gpu_coredump *error;
382
383 error = i915_first_error_state(i915: inode->i_private);
384 if (IS_ERR(ptr: error))
385 return PTR_ERR(ptr: error);
386
387 file->private_data = error;
388 return 0;
389}
390
391static const struct file_operations i915_error_state_fops = {
392 .owner = THIS_MODULE,
393 .open = i915_error_state_open,
394 .read = gpu_state_read,
395 .write = i915_error_state_write,
396 .llseek = default_llseek,
397 .release = gpu_state_release,
398};
399#endif
400
401static int i915_frequency_info(struct seq_file *m, void *unused)
402{
403 struct drm_i915_private *i915 = node_to_i915(node: m->private);
404 struct intel_gt *gt = to_gt(i915);
405 struct drm_printer p = drm_seq_file_printer(f: m);
406
407 intel_gt_pm_frequency_dump(gt, m: &p);
408
409 return 0;
410}
411
412static const char *swizzle_string(unsigned swizzle)
413{
414 switch (swizzle) {
415 case I915_BIT_6_SWIZZLE_NONE:
416 return "none";
417 case I915_BIT_6_SWIZZLE_9:
418 return "bit9";
419 case I915_BIT_6_SWIZZLE_9_10:
420 return "bit9/bit10";
421 case I915_BIT_6_SWIZZLE_9_11:
422 return "bit9/bit11";
423 case I915_BIT_6_SWIZZLE_9_10_11:
424 return "bit9/bit10/bit11";
425 case I915_BIT_6_SWIZZLE_9_17:
426 return "bit9/bit17";
427 case I915_BIT_6_SWIZZLE_9_10_17:
428 return "bit9/bit10/bit17";
429 case I915_BIT_6_SWIZZLE_UNKNOWN:
430 return "unknown";
431 }
432
433 return "bug";
434}
435
436static int i915_swizzle_info(struct seq_file *m, void *data)
437{
438 struct drm_i915_private *dev_priv = node_to_i915(node: m->private);
439 struct intel_uncore *uncore = &dev_priv->uncore;
440 intel_wakeref_t wakeref;
441
442 seq_printf(m, fmt: "bit6 swizzle for X-tiling = %s\n",
443 swizzle_string(swizzle: to_gt(i915: dev_priv)->ggtt->bit_6_swizzle_x));
444 seq_printf(m, fmt: "bit6 swizzle for Y-tiling = %s\n",
445 swizzle_string(swizzle: to_gt(i915: dev_priv)->ggtt->bit_6_swizzle_y));
446
447 if (dev_priv->gem_quirks & GEM_QUIRK_PIN_SWIZZLED_PAGES)
448 seq_puts(m, s: "L-shaped memory detected\n");
449
450 /* On BDW+, swizzling is not used. See detect_bit_6_swizzle() */
451 if (GRAPHICS_VER(dev_priv) >= 8 || IS_VALLEYVIEW(dev_priv))
452 return 0;
453
454 wakeref = intel_runtime_pm_get(rpm: &dev_priv->runtime_pm);
455
456 if (IS_GRAPHICS_VER(dev_priv, 3, 4)) {
457 seq_printf(m, fmt: "DDC = 0x%08x\n",
458 intel_uncore_read(uncore, DCC));
459 seq_printf(m, fmt: "DDC2 = 0x%08x\n",
460 intel_uncore_read(uncore, DCC2));
461 seq_printf(m, fmt: "C0DRB3 = 0x%04x\n",
462 intel_uncore_read16(uncore, C0DRB3_BW));
463 seq_printf(m, fmt: "C1DRB3 = 0x%04x\n",
464 intel_uncore_read16(uncore, C1DRB3_BW));
465 } else if (GRAPHICS_VER(dev_priv) >= 6) {
466 seq_printf(m, fmt: "MAD_DIMM_C0 = 0x%08x\n",
467 intel_uncore_read(uncore, MAD_DIMM_C0));
468 seq_printf(m, fmt: "MAD_DIMM_C1 = 0x%08x\n",
469 intel_uncore_read(uncore, MAD_DIMM_C1));
470 seq_printf(m, fmt: "MAD_DIMM_C2 = 0x%08x\n",
471 intel_uncore_read(uncore, MAD_DIMM_C2));
472 seq_printf(m, fmt: "TILECTL = 0x%08x\n",
473 intel_uncore_read(uncore, TILECTL));
474 if (GRAPHICS_VER(dev_priv) >= 8)
475 seq_printf(m, fmt: "GAMTARBMODE = 0x%08x\n",
476 intel_uncore_read(uncore, GAMTARBMODE));
477 else
478 seq_printf(m, fmt: "ARB_MODE = 0x%08x\n",
479 intel_uncore_read(uncore, ARB_MODE));
480 seq_printf(m, fmt: "DISP_ARB_CTL = 0x%08x\n",
481 intel_uncore_read(uncore, DISP_ARB_CTL));
482 }
483
484 intel_runtime_pm_put(rpm: &dev_priv->runtime_pm, wref: wakeref);
485
486 return 0;
487}
488
489static int i915_rps_boost_info(struct seq_file *m, void *data)
490{
491 struct drm_i915_private *dev_priv = node_to_i915(node: m->private);
492 struct intel_rps *rps = &to_gt(i915: dev_priv)->rps;
493
494 seq_printf(m, fmt: "RPS enabled? %s\n",
495 str_yes_no(v: intel_rps_is_enabled(rps)));
496 seq_printf(m, fmt: "RPS active? %s\n",
497 str_yes_no(v: intel_rps_is_active(rps)));
498 seq_printf(m, fmt: "GPU busy? %s\n", str_yes_no(v: to_gt(i915: dev_priv)->awake));
499 seq_printf(m, fmt: "Boosts outstanding? %d\n",
500 atomic_read(v: &rps->num_waiters));
501 seq_printf(m, fmt: "Interactive? %d\n", READ_ONCE(rps->power.interactive));
502 seq_printf(m, fmt: "Frequency requested %d, actual %d\n",
503 intel_gpu_freq(rps, val: rps->cur_freq),
504 intel_rps_read_actual_frequency(rps));
505 seq_printf(m, fmt: " min hard:%d, soft:%d; max soft:%d, hard:%d\n",
506 intel_gpu_freq(rps, val: rps->min_freq),
507 intel_gpu_freq(rps, val: rps->min_freq_softlimit),
508 intel_gpu_freq(rps, val: rps->max_freq_softlimit),
509 intel_gpu_freq(rps, val: rps->max_freq));
510 seq_printf(m, fmt: " idle:%d, efficient:%d, boost:%d\n",
511 intel_gpu_freq(rps, val: rps->idle_freq),
512 intel_gpu_freq(rps, val: rps->efficient_freq),
513 intel_gpu_freq(rps, val: rps->boost_freq));
514
515 seq_printf(m, fmt: "Wait boosts: %d\n", READ_ONCE(rps->boosts));
516
517 return 0;
518}
519
520static int i915_runtime_pm_status(struct seq_file *m, void *unused)
521{
522 struct drm_i915_private *dev_priv = node_to_i915(node: m->private);
523 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
524
525 if (!HAS_RUNTIME_PM(dev_priv))
526 seq_puts(m, s: "Runtime power management not supported\n");
527
528 seq_printf(m, fmt: "Runtime power status: %s\n",
529 str_enabled_disabled(v: !dev_priv->display.power.domains.init_wakeref));
530
531 seq_printf(m, fmt: "GPU idle: %s\n", str_yes_no(v: !to_gt(i915: dev_priv)->awake));
532 seq_printf(m, fmt: "IRQs disabled: %s\n",
533 str_yes_no(v: !intel_irqs_enabled(dev_priv)));
534#ifdef CONFIG_PM
535 seq_printf(m, fmt: "Usage count: %d\n",
536 atomic_read(v: &dev_priv->drm.dev->power.usage_count));
537#else
538 seq_printf(m, "Device Power Management (CONFIG_PM) disabled\n");
539#endif
540 seq_printf(m, fmt: "PCI device power state: %s [%d]\n",
541 pci_power_name(state: pdev->current_state),
542 pdev->current_state);
543
544 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)) {
545 struct drm_printer p = drm_seq_file_printer(f: m);
546
547 print_intel_runtime_pm_wakeref(rpm: &dev_priv->runtime_pm, p: &p);
548 }
549
550 return 0;
551}
552
553static int i915_engine_info(struct seq_file *m, void *unused)
554{
555 struct drm_i915_private *i915 = node_to_i915(node: m->private);
556 struct intel_engine_cs *engine;
557 intel_wakeref_t wakeref;
558 struct drm_printer p;
559
560 wakeref = intel_runtime_pm_get(rpm: &i915->runtime_pm);
561
562 seq_printf(m, fmt: "GT awake? %s [%d], %llums\n",
563 str_yes_no(v: to_gt(i915)->awake),
564 atomic_read(v: &to_gt(i915)->wakeref.count),
565 ktime_to_ms(kt: intel_gt_get_awake_time(gt: to_gt(i915))));
566 seq_printf(m, fmt: "CS timestamp frequency: %u Hz, %d ns\n",
567 to_gt(i915)->clock_frequency,
568 to_gt(i915)->clock_period_ns);
569
570 p = drm_seq_file_printer(f: m);
571 for_each_uabi_engine(engine, i915)
572 intel_engine_dump(engine, m: &p, header: "%s\n", engine->name);
573
574 intel_gt_show_timelines(gt: to_gt(i915), m: &p, show_request: i915_request_show_with_schedule);
575
576 intel_runtime_pm_put(rpm: &i915->runtime_pm, wref: wakeref);
577
578 return 0;
579}
580
581static int i915_wa_registers(struct seq_file *m, void *unused)
582{
583 struct drm_i915_private *i915 = node_to_i915(node: m->private);
584 struct intel_engine_cs *engine;
585
586 for_each_uabi_engine(engine, i915) {
587 const struct i915_wa_list *wal = &engine->ctx_wa_list;
588 const struct i915_wa *wa;
589 unsigned int count;
590
591 count = wal->count;
592 if (!count)
593 continue;
594
595 seq_printf(m, fmt: "%s: Workarounds applied: %u\n",
596 engine->name, count);
597
598 for (wa = wal->list; count--; wa++)
599 seq_printf(m, fmt: "0x%X: 0x%08X, mask: 0x%08X\n",
600 i915_mmio_reg_offset(wa->reg),
601 wa->set, wa->clr);
602
603 seq_printf(m, fmt: "\n");
604 }
605
606 return 0;
607}
608
609static int i915_wedged_get(void *data, u64 *val)
610{
611 struct drm_i915_private *i915 = data;
612 struct intel_gt *gt;
613 unsigned int i;
614
615 *val = 0;
616
617 for_each_gt(gt, i915, i) {
618 int ret;
619
620 ret = intel_gt_debugfs_reset_show(gt, val);
621 if (ret)
622 return ret;
623
624 /* at least one tile should be wedged */
625 if (*val)
626 break;
627 }
628
629 return 0;
630}
631
632static int i915_wedged_set(void *data, u64 val)
633{
634 struct drm_i915_private *i915 = data;
635 struct intel_gt *gt;
636 unsigned int i;
637
638 for_each_gt(gt, i915, i)
639 intel_gt_debugfs_reset_store(gt, val);
640
641 return 0;
642}
643
644DEFINE_SIMPLE_ATTRIBUTE(i915_wedged_fops,
645 i915_wedged_get, i915_wedged_set,
646 "%llu\n");
647
648static int
649i915_perf_noa_delay_set(void *data, u64 val)
650{
651 struct drm_i915_private *i915 = data;
652
653 /*
654 * This would lead to infinite waits as we're doing timestamp
655 * difference on the CS with only 32bits.
656 */
657 if (intel_gt_ns_to_clock_interval(gt: to_gt(i915), ns: val) > U32_MAX)
658 return -EINVAL;
659
660 atomic64_set(v: &i915->perf.noa_programming_delay, i: val);
661 return 0;
662}
663
664static int
665i915_perf_noa_delay_get(void *data, u64 *val)
666{
667 struct drm_i915_private *i915 = data;
668
669 *val = atomic64_read(v: &i915->perf.noa_programming_delay);
670 return 0;
671}
672
673DEFINE_SIMPLE_ATTRIBUTE(i915_perf_noa_delay_fops,
674 i915_perf_noa_delay_get,
675 i915_perf_noa_delay_set,
676 "%llu\n");
677
678#define DROP_UNBOUND BIT(0)
679#define DROP_BOUND BIT(1)
680#define DROP_RETIRE BIT(2)
681#define DROP_ACTIVE BIT(3)
682#define DROP_FREED BIT(4)
683#define DROP_SHRINK_ALL BIT(5)
684#define DROP_IDLE BIT(6)
685#define DROP_RESET_ACTIVE BIT(7)
686#define DROP_RESET_SEQNO BIT(8)
687#define DROP_RCU BIT(9)
688#define DROP_ALL (DROP_UNBOUND | \
689 DROP_BOUND | \
690 DROP_RETIRE | \
691 DROP_ACTIVE | \
692 DROP_FREED | \
693 DROP_SHRINK_ALL |\
694 DROP_IDLE | \
695 DROP_RESET_ACTIVE | \
696 DROP_RESET_SEQNO | \
697 DROP_RCU)
698static int
699i915_drop_caches_get(void *data, u64 *val)
700{
701 *val = DROP_ALL;
702
703 return 0;
704}
705
706static int
707gt_drop_caches(struct intel_gt *gt, u64 val)
708{
709 int ret;
710
711 if (val & DROP_RESET_ACTIVE &&
712 wait_for(intel_engines_are_idle(gt), 200))
713 intel_gt_set_wedged(gt);
714
715 if (val & DROP_RETIRE)
716 intel_gt_retire_requests(gt);
717
718 if (val & (DROP_IDLE | DROP_ACTIVE)) {
719 ret = intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
720 if (ret)
721 return ret;
722 }
723
724 if (val & DROP_IDLE) {
725 ret = intel_gt_pm_wait_for_idle(gt);
726 if (ret)
727 return ret;
728 }
729
730 if (val & DROP_RESET_ACTIVE && intel_gt_terminally_wedged(gt))
731 intel_gt_handle_error(gt, ALL_ENGINES, flags: 0, NULL);
732
733 if (val & DROP_FREED)
734 intel_gt_flush_buffer_pool(gt);
735
736 return 0;
737}
738
739static int
740i915_drop_caches_set(void *data, u64 val)
741{
742 struct drm_i915_private *i915 = data;
743 struct intel_gt *gt;
744 unsigned int flags;
745 unsigned int i;
746 int ret;
747
748 drm_dbg(&i915->drm, "Dropping caches: 0x%08llx [0x%08llx]\n",
749 val, val & DROP_ALL);
750
751 for_each_gt(gt, i915, i) {
752 ret = gt_drop_caches(gt, val);
753 if (ret)
754 return ret;
755 }
756
757 fs_reclaim_acquire(GFP_KERNEL);
758 flags = memalloc_noreclaim_save();
759 if (val & DROP_BOUND)
760 i915_gem_shrink(NULL, i915, LONG_MAX, NULL, I915_SHRINK_BOUND);
761
762 if (val & DROP_UNBOUND)
763 i915_gem_shrink(NULL, i915, LONG_MAX, NULL, I915_SHRINK_UNBOUND);
764
765 if (val & DROP_SHRINK_ALL)
766 i915_gem_shrink_all(i915);
767 memalloc_noreclaim_restore(flags);
768 fs_reclaim_release(GFP_KERNEL);
769
770 if (val & DROP_RCU)
771 rcu_barrier();
772
773 if (val & DROP_FREED)
774 i915_gem_drain_freed_objects(i915);
775
776 return 0;
777}
778
779DEFINE_SIMPLE_ATTRIBUTE(i915_drop_caches_fops,
780 i915_drop_caches_get, i915_drop_caches_set,
781 "0x%08llx\n");
782
783static int i915_sseu_status(struct seq_file *m, void *unused)
784{
785 struct drm_i915_private *i915 = node_to_i915(node: m->private);
786 struct intel_gt *gt = to_gt(i915);
787
788 return intel_sseu_status(m, gt);
789}
790
791static int i915_forcewake_open(struct inode *inode, struct file *file)
792{
793 struct drm_i915_private *i915 = inode->i_private;
794 struct intel_gt *gt;
795 unsigned int i;
796
797 for_each_gt(gt, i915, i)
798 intel_gt_pm_debugfs_forcewake_user_open(gt);
799
800 return 0;
801}
802
803static int i915_forcewake_release(struct inode *inode, struct file *file)
804{
805 struct drm_i915_private *i915 = inode->i_private;
806 struct intel_gt *gt;
807 unsigned int i;
808
809 for_each_gt(gt, i915, i)
810 intel_gt_pm_debugfs_forcewake_user_release(gt);
811
812 return 0;
813}
814
815static const struct file_operations i915_forcewake_fops = {
816 .owner = THIS_MODULE,
817 .open = i915_forcewake_open,
818 .release = i915_forcewake_release,
819};
820
821static const struct drm_info_list i915_debugfs_list[] = {
822 {"i915_capabilities", i915_capabilities, 0},
823 {"i915_gem_objects", i915_gem_object_info, 0},
824 {"i915_frequency_info", i915_frequency_info, 0},
825 {"i915_swizzle_info", i915_swizzle_info, 0},
826 {"i915_runtime_pm_status", i915_runtime_pm_status, 0},
827 {"i915_engine_info", i915_engine_info, 0},
828 {"i915_wa_registers", i915_wa_registers, 0},
829 {"i915_sseu_status", i915_sseu_status, 0},
830 {"i915_rps_boost_info", i915_rps_boost_info, 0},
831};
832
833static const struct i915_debugfs_files {
834 const char *name;
835 const struct file_operations *fops;
836} i915_debugfs_files[] = {
837 {"i915_perf_noa_delay", &i915_perf_noa_delay_fops},
838 {"i915_wedged", &i915_wedged_fops},
839 {"i915_gem_drop_caches", &i915_drop_caches_fops},
840#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
841 {"i915_error_state", &i915_error_state_fops},
842 {"i915_gpu_info", &i915_gpu_info_fops},
843#endif
844};
845
846void i915_debugfs_register(struct drm_i915_private *dev_priv)
847{
848 struct drm_minor *minor = dev_priv->drm.primary;
849 int i;
850
851 i915_debugfs_params(i915: dev_priv);
852
853 debugfs_create_file(name: "i915_forcewake_user", S_IRUSR, parent: minor->debugfs_root,
854 data: to_i915(dev: minor->dev), fops: &i915_forcewake_fops);
855 for (i = 0; i < ARRAY_SIZE(i915_debugfs_files); i++) {
856 debugfs_create_file(name: i915_debugfs_files[i].name,
857 S_IRUGO | S_IWUSR,
858 parent: minor->debugfs_root,
859 data: to_i915(dev: minor->dev),
860 fops: i915_debugfs_files[i].fops);
861 }
862
863 drm_debugfs_create_files(files: i915_debugfs_list,
864 ARRAY_SIZE(i915_debugfs_list),
865 root: minor->debugfs_root, minor);
866}
867

source code of linux/drivers/gpu/drm/i915/i915_debugfs.c