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1/*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright © 2018 Intel Corporation
5 */
6
7#include <linux/nospec.h>
8
9#include "i915_drv.h"
10#include "i915_perf.h"
11#include "i915_query.h"
12#include "gt/intel_engine_user.h"
13#include <uapi/drm/i915_drm.h>
14
15static int copy_query_item(void *query_hdr, size_t query_sz,
16 u32 total_length,
17 struct drm_i915_query_item *query_item)
18{
19 if (query_item->length == 0)
20 return total_length;
21
22 if (query_item->length < total_length)
23 return -EINVAL;
24
25 if (copy_from_user(query_hdr, u64_to_user_ptr(query_item->data_ptr),
26 query_sz))
27 return -EFAULT;
28
29 return 0;
30}
31
32static int fill_topology_info(const struct sseu_dev_info *sseu,
33 struct drm_i915_query_item *query_item,
34 intel_sseu_ss_mask_t subslice_mask)
35{
36 struct drm_i915_query_topology_info topo;
37 u32 slice_length, subslice_length, eu_length, total_length;
38 int ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
39 int eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
40 int ret;
41
42 BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
43
44 if (sseu->max_slices == 0)
45 return -ENODEV;
46
47 slice_length = sizeof(sseu->slice_mask);
48 subslice_length = sseu->max_slices * ss_stride;
49 eu_length = sseu->max_slices * sseu->max_subslices * eu_stride;
50 total_length = sizeof(topo) + slice_length + subslice_length +
51 eu_length;
52
53 ret = copy_query_item(&topo, sizeof(topo), total_length, query_item);
54
55 if (ret != 0)
56 return ret;
57
58 memset(&topo, 0, sizeof(topo));
59 topo.max_slices = sseu->max_slices;
60 topo.max_subslices = sseu->max_subslices;
61 topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
62
63 topo.subslice_offset = slice_length;
64 topo.subslice_stride = ss_stride;
65 topo.eu_offset = slice_length + subslice_length;
66 topo.eu_stride = eu_stride;
67
68 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
69 &topo, sizeof(topo)))
70 return -EFAULT;
71
72 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)),
73 &sseu->slice_mask, slice_length))
74 return -EFAULT;
75
76 if (intel_sseu_copy_ssmask_to_user(u64_to_user_ptr(query_item->data_ptr +
77 sizeof(topo) + slice_length),
78 sseu))
79 return -EFAULT;
80
81 if (intel_sseu_copy_eumask_to_user(u64_to_user_ptr(query_item->data_ptr +
82 sizeof(topo) +
83 slice_length + subslice_length),
84 sseu))
85 return -EFAULT;
86
87 return total_length;
88}
89
90static int query_topology_info(struct drm_i915_private *dev_priv,
91 struct drm_i915_query_item *query_item)
92{
93 const struct sseu_dev_info *sseu = &to_gt(dev_priv)->info.sseu;
94
95 if (query_item->flags != 0)
96 return -EINVAL;
97
98 return fill_topology_info(sseu, query_item, sseu->subslice_mask);
99}
100
101static int query_geometry_subslices(struct drm_i915_private *i915,
102 struct drm_i915_query_item *query_item)
103{
104 const struct sseu_dev_info *sseu;
105 struct intel_engine_cs *engine;
106 struct i915_engine_class_instance classinstance;
107
108 if (GRAPHICS_VER_FULL(i915) < IP_VER(12, 50))
109 return -ENODEV;
110
111 classinstance = *((struct i915_engine_class_instance *)&query_item->flags);
112
113 engine = intel_engine_lookup_user(i915, (u8)classinstance.engine_class,
114 (u8)classinstance.engine_instance);
115
116 if (!engine)
117 return -EINVAL;
118
119 if (engine->class != RENDER_CLASS)
120 return -EINVAL;
121
122 sseu = &engine->gt->info.sseu;
123
124 return fill_topology_info(sseu, query_item, sseu->geometry_subslice_mask);
125}
126
127static int
128query_engine_info(struct drm_i915_private *i915,
129 struct drm_i915_query_item *query_item)
130{
131 struct drm_i915_query_engine_info __user *query_ptr =
132 u64_to_user_ptr(query_item->data_ptr);
133 struct drm_i915_engine_info __user *info_ptr;
134 struct drm_i915_query_engine_info query;
135 struct drm_i915_engine_info info = { };
136 unsigned int num_uabi_engines = 0;
137 struct intel_engine_cs *engine;
138 int len, ret;
139
140 if (query_item->flags)
141 return -EINVAL;
142
143 for_each_uabi_engine(engine, i915)
144 num_uabi_engines++;
145
146 len = struct_size(query_ptr, engines, num_uabi_engines);
147
148 ret = copy_query_item(&query, sizeof(query), len, query_item);
149 if (ret != 0)
150 return ret;
151
152 if (query.num_engines || query.rsvd[0] || query.rsvd[1] ||
153 query.rsvd[2])
154 return -EINVAL;
155
156 info_ptr = &query_ptr->engines[0];
157
158 for_each_uabi_engine(engine, i915) {
159 info.engine.engine_class = engine->uabi_class;
160 info.engine.engine_instance = engine->uabi_instance;
161 info.flags = I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE;
162 info.capabilities = engine->uabi_capabilities;
163 info.logical_instance = ilog2(engine->logical_mask);
164
165 if (copy_to_user(info_ptr, &info, sizeof(info)))
166 return -EFAULT;
167
168 query.num_engines++;
169 info_ptr++;
170 }
171
172 if (copy_to_user(query_ptr, &query, sizeof(query)))
173 return -EFAULT;
174
175 return len;
176}
177
178static int can_copy_perf_config_registers_or_number(u32 user_n_regs,
179 u64 user_regs_ptr,
180 u32 kernel_n_regs)
181{
182 /*
183 * We'll just put the number of registers, and won't copy the
184 * register.
185 */
186 if (user_n_regs == 0)
187 return 0;
188
189 if (user_n_regs < kernel_n_regs)
190 return -EINVAL;
191
192 return 0;
193}
194
195static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs,
196 u32 kernel_n_regs,
197 u64 user_regs_ptr,
198 u32 *user_n_regs)
199{
200 u32 __user *p = u64_to_user_ptr(user_regs_ptr);
201 u32 r;
202
203 if (*user_n_regs == 0) {
204 *user_n_regs = kernel_n_regs;
205 return 0;
206 }
207
208 *user_n_regs = kernel_n_regs;
209
210 if (!user_write_access_begin(p, 2 * sizeof(u32) * kernel_n_regs))
211 return -EFAULT;
212
213 for (r = 0; r < kernel_n_regs; r++, p += 2) {
214 unsafe_put_user(i915_mmio_reg_offset(kernel_regs[r].addr),
215 p, Efault);
216 unsafe_put_user(kernel_regs[r].value, p + 1, Efault);
217 }
218 user_write_access_end();
219 return 0;
220Efault:
221 user_write_access_end();
222 return -EFAULT;
223}
224
225static int query_perf_config_data(struct drm_i915_private *i915,
226 struct drm_i915_query_item *query_item,
227 bool use_uuid)
228{
229 struct drm_i915_query_perf_config __user *user_query_config_ptr =
230 u64_to_user_ptr(query_item->data_ptr);
231 struct drm_i915_perf_oa_config __user *user_config_ptr =
232 u64_to_user_ptr(query_item->data_ptr +
233 sizeof(struct drm_i915_query_perf_config));
234 struct drm_i915_perf_oa_config user_config;
235 struct i915_perf *perf = &i915->perf;
236 struct i915_oa_config *oa_config;
237 char uuid[UUID_STRING_LEN + 1];
238 u64 config_id;
239 u32 flags, total_size;
240 int ret;
241
242 if (!perf->i915)
243 return -ENODEV;
244
245 total_size =
246 sizeof(struct drm_i915_query_perf_config) +
247 sizeof(struct drm_i915_perf_oa_config);
248
249 if (query_item->length == 0)
250 return total_size;
251
252 if (query_item->length < total_size) {
253 drm_dbg(&i915->drm,
254 "Invalid query config data item size=%u expected=%u\n",
255 query_item->length, total_size);
256 return -EINVAL;
257 }
258
259 if (get_user(flags, &user_query_config_ptr->flags))
260 return -EFAULT;
261
262 if (flags != 0)
263 return -EINVAL;
264
265 if (use_uuid) {
266 struct i915_oa_config *tmp;
267 int id;
268
269 BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid));
270
271 memset(&uuid, 0, sizeof(uuid));
272 if (copy_from_user(uuid, user_query_config_ptr->uuid,
273 sizeof(user_query_config_ptr->uuid)))
274 return -EFAULT;
275
276 oa_config = NULL;
277 rcu_read_lock();
278 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
279 if (!strcmp(tmp->uuid, uuid)) {
280 oa_config = i915_oa_config_get(tmp);
281 break;
282 }
283 }
284 rcu_read_unlock();
285 } else {
286 if (get_user(config_id, &user_query_config_ptr->config))
287 return -EFAULT;
288
289 oa_config = i915_perf_get_oa_config(perf, config_id);
290 }
291 if (!oa_config)
292 return -ENOENT;
293
294 if (copy_from_user(&user_config, user_config_ptr, sizeof(user_config))) {
295 ret = -EFAULT;
296 goto out;
297 }
298
299 ret = can_copy_perf_config_registers_or_number(user_config.n_boolean_regs,
300 user_config.boolean_regs_ptr,
301 oa_config->b_counter_regs_len);
302 if (ret)
303 goto out;
304
305 ret = can_copy_perf_config_registers_or_number(user_config.n_flex_regs,
306 user_config.flex_regs_ptr,
307 oa_config->flex_regs_len);
308 if (ret)
309 goto out;
310
311 ret = can_copy_perf_config_registers_or_number(user_config.n_mux_regs,
312 user_config.mux_regs_ptr,
313 oa_config->mux_regs_len);
314 if (ret)
315 goto out;
316
317 ret = copy_perf_config_registers_or_number(oa_config->b_counter_regs,
318 oa_config->b_counter_regs_len,
319 user_config.boolean_regs_ptr,
320 &user_config.n_boolean_regs);
321 if (ret)
322 goto out;
323
324 ret = copy_perf_config_registers_or_number(oa_config->flex_regs,
325 oa_config->flex_regs_len,
326 user_config.flex_regs_ptr,
327 &user_config.n_flex_regs);
328 if (ret)
329 goto out;
330
331 ret = copy_perf_config_registers_or_number(oa_config->mux_regs,
332 oa_config->mux_regs_len,
333 user_config.mux_regs_ptr,
334 &user_config.n_mux_regs);
335 if (ret)
336 goto out;
337
338 memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid));
339
340 if (copy_to_user(user_config_ptr, &user_config, sizeof(user_config))) {
341 ret = -EFAULT;
342 goto out;
343 }
344
345 ret = total_size;
346
347out:
348 i915_oa_config_put(oa_config);
349 return ret;
350}
351
352static size_t sizeof_perf_config_list(size_t count)
353{
354 return sizeof(struct drm_i915_query_perf_config) + sizeof(u64) * count;
355}
356
357static size_t sizeof_perf_metrics(struct i915_perf *perf)
358{
359 struct i915_oa_config *tmp;
360 size_t i;
361 int id;
362
363 i = 1;
364 rcu_read_lock();
365 idr_for_each_entry(&perf->metrics_idr, tmp, id)
366 i++;
367 rcu_read_unlock();
368
369 return sizeof_perf_config_list(i);
370}
371
372static int query_perf_config_list(struct drm_i915_private *i915,
373 struct drm_i915_query_item *query_item)
374{
375 struct drm_i915_query_perf_config __user *user_query_config_ptr =
376 u64_to_user_ptr(query_item->data_ptr);
377 struct i915_perf *perf = &i915->perf;
378 u64 *oa_config_ids = NULL;
379 int alloc, n_configs;
380 u32 flags;
381 int ret;
382
383 if (!perf->i915)
384 return -ENODEV;
385
386 if (query_item->length == 0)
387 return sizeof_perf_metrics(perf);
388
389 if (get_user(flags, &user_query_config_ptr->flags))
390 return -EFAULT;
391
392 if (flags != 0)
393 return -EINVAL;
394
395 n_configs = 1;
396 do {
397 struct i915_oa_config *tmp;
398 u64 *ids;
399 int id;
400
401 ids = krealloc(oa_config_ids,
402 n_configs * sizeof(*oa_config_ids),
403 GFP_KERNEL);
404 if (!ids)
405 return -ENOMEM;
406
407 alloc = fetch_and_zero(&n_configs);
408
409 ids[n_configs++] = 1ull; /* reserved for test_config */
410 rcu_read_lock();
411 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
412 if (n_configs < alloc)
413 ids[n_configs] = id;
414 n_configs++;
415 }
416 rcu_read_unlock();
417
418 oa_config_ids = ids;
419 } while (n_configs > alloc);
420
421 if (query_item->length < sizeof_perf_config_list(n_configs)) {
422 drm_dbg(&i915->drm,
423 "Invalid query config list item size=%u expected=%zu\n",
424 query_item->length,
425 sizeof_perf_config_list(n_configs));
426 kfree(oa_config_ids);
427 return -EINVAL;
428 }
429
430 if (put_user(n_configs, &user_query_config_ptr->config)) {
431 kfree(oa_config_ids);
432 return -EFAULT;
433 }
434
435 ret = copy_to_user(user_query_config_ptr + 1,
436 oa_config_ids,
437 n_configs * sizeof(*oa_config_ids));
438 kfree(oa_config_ids);
439 if (ret)
440 return -EFAULT;
441
442 return sizeof_perf_config_list(n_configs);
443}
444
445static int query_perf_config(struct drm_i915_private *i915,
446 struct drm_i915_query_item *query_item)
447{
448 switch (query_item->flags) {
449 case DRM_I915_QUERY_PERF_CONFIG_LIST:
450 return query_perf_config_list(i915, query_item);
451 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID:
452 return query_perf_config_data(i915, query_item, true);
453 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID:
454 return query_perf_config_data(i915, query_item, false);
455 default:
456 return -EINVAL;
457 }
458}
459
460static int query_memregion_info(struct drm_i915_private *i915,
461 struct drm_i915_query_item *query_item)
462{
463 struct drm_i915_query_memory_regions __user *query_ptr =
464 u64_to_user_ptr(query_item->data_ptr);
465 struct drm_i915_memory_region_info __user *info_ptr =
466 &query_ptr->regions[0];
467 struct drm_i915_memory_region_info info = { };
468 struct drm_i915_query_memory_regions query;
469 struct intel_memory_region *mr;
470 u32 total_length;
471 int ret, id, i;
472
473 if (query_item->flags != 0)
474 return -EINVAL;
475
476 total_length = sizeof(query);
477 for_each_memory_region(mr, i915, id) {
478 if (mr->private)
479 continue;
480
481 total_length += sizeof(info);
482 }
483
484 ret = copy_query_item(&query, sizeof(query), total_length, query_item);
485 if (ret != 0)
486 return ret;
487
488 if (query.num_regions)
489 return -EINVAL;
490
491 for (i = 0; i < ARRAY_SIZE(query.rsvd); i++) {
492 if (query.rsvd[i])
493 return -EINVAL;
494 }
495
496 for_each_memory_region(mr, i915, id) {
497 if (mr->private)
498 continue;
499
500 info.region.memory_class = mr->type;
501 info.region.memory_instance = mr->instance;
502 info.probed_size = mr->total;
503
504 if (mr->type == INTEL_MEMORY_LOCAL)
505 info.probed_cpu_visible_size = mr->io_size;
506 else
507 info.probed_cpu_visible_size = mr->total;
508
509 if (perfmon_capable()) {
510 intel_memory_region_avail(mr,
511 &info.unallocated_size,
512 &info.unallocated_cpu_visible_size);
513 } else {
514 info.unallocated_size = info.probed_size;
515 info.unallocated_cpu_visible_size =
516 info.probed_cpu_visible_size;
517 }
518
519 if (__copy_to_user(info_ptr, &info, sizeof(info)))
520 return -EFAULT;
521
522 query.num_regions++;
523 info_ptr++;
524 }
525
526 if (__copy_to_user(query_ptr, &query, sizeof(query)))
527 return -EFAULT;
528
529 return total_length;
530}
531
532static int query_hwconfig_blob(struct drm_i915_private *i915,
533 struct drm_i915_query_item *query_item)
534{
535 struct intel_gt *gt = to_gt(i915);
536 struct intel_hwconfig *hwconfig = >->info.hwconfig;
537
538 if (!hwconfig->size || !hwconfig->ptr)
539 return -ENODEV;
540
541 if (query_item->length == 0)
542 return hwconfig->size;
543
544 if (query_item->length < hwconfig->size)
545 return -EINVAL;
546
547 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
548 hwconfig->ptr, hwconfig->size))
549 return -EFAULT;
550
551 return hwconfig->size;
552}
553
554static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
555 struct drm_i915_query_item *query_item) = {
556 query_topology_info,
557 query_engine_info,
558 query_perf_config,
559 query_memregion_info,
560 query_hwconfig_blob,
561 query_geometry_subslices,
562};
563
564int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
565{
566 struct drm_i915_private *dev_priv = to_i915(dev);
567 struct drm_i915_query *args = data;
568 struct drm_i915_query_item __user *user_item_ptr =
569 u64_to_user_ptr(args->items_ptr);
570 u32 i;
571
572 if (args->flags != 0)
573 return -EINVAL;
574
575 for (i = 0; i < args->num_items; i++, user_item_ptr++) {
576 struct drm_i915_query_item item;
577 unsigned long func_idx;
578 int ret;
579
580 if (copy_from_user(&item, user_item_ptr, sizeof(item)))
581 return -EFAULT;
582
583 if (item.query_id == 0)
584 return -EINVAL;
585
586 if (overflows_type(item.query_id - 1, unsigned long))
587 return -EINVAL;
588
589 func_idx = item.query_id - 1;
590
591 ret = -EINVAL;
592 if (func_idx < ARRAY_SIZE(i915_query_funcs)) {
593 func_idx = array_index_nospec(func_idx,
594 ARRAY_SIZE(i915_query_funcs));
595 ret = i915_query_funcs[func_idx](dev_priv, &item);
596 }
597
598 /* Only write the length back to userspace if they differ. */
599 if (ret != item.length && put_user(ret, &user_item_ptr->length))
600 return -EFAULT;
601 }
602
603 return 0;
604}