1/*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright © 2018 Intel Corporation
5 */
6
7#include <linux/nospec.h>
8
9#include <drm/drm_print.h>
10
11#include "i915_drv.h"
12#include "i915_perf.h"
13#include "i915_query.h"
14#include "gt/intel_engine_user.h"
15#include <uapi/drm/i915_drm.h>
16
17static int copy_query_item(void *query_hdr, size_t query_sz,
18 u32 total_length,
19 struct drm_i915_query_item *query_item)
20{
21 if (query_item->length == 0)
22 return total_length;
23
24 if (query_item->length < total_length)
25 return -EINVAL;
26
27 if (copy_from_user(to: query_hdr, u64_to_user_ptr(query_item->data_ptr),
28 n: query_sz))
29 return -EFAULT;
30
31 return 0;
32}
33
34static int fill_topology_info(const struct sseu_dev_info *sseu,
35 struct drm_i915_query_item *query_item,
36 intel_sseu_ss_mask_t subslice_mask)
37{
38 struct drm_i915_query_topology_info topo;
39 u32 slice_length, subslice_length, eu_length, total_length;
40 int ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
41 int eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
42 int ret;
43
44 BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
45
46 if (sseu->max_slices == 0)
47 return -ENODEV;
48
49 slice_length = sizeof(sseu->slice_mask);
50 subslice_length = sseu->max_slices * ss_stride;
51 eu_length = sseu->max_slices * sseu->max_subslices * eu_stride;
52 total_length = sizeof(topo) + slice_length + subslice_length +
53 eu_length;
54
55 ret = copy_query_item(query_hdr: &topo, query_sz: sizeof(topo), total_length, query_item);
56
57 if (ret != 0)
58 return ret;
59
60 memset(&topo, 0, sizeof(topo));
61 topo.max_slices = sseu->max_slices;
62 topo.max_subslices = sseu->max_subslices;
63 topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
64
65 topo.subslice_offset = slice_length;
66 topo.subslice_stride = ss_stride;
67 topo.eu_offset = slice_length + subslice_length;
68 topo.eu_stride = eu_stride;
69
70 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
71 from: &topo, n: sizeof(topo)))
72 return -EFAULT;
73
74 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)),
75 from: &sseu->slice_mask, n: slice_length))
76 return -EFAULT;
77
78 if (intel_sseu_copy_ssmask_to_user(u64_to_user_ptr(query_item->data_ptr +
79 sizeof(topo) + slice_length),
80 sseu))
81 return -EFAULT;
82
83 if (intel_sseu_copy_eumask_to_user(u64_to_user_ptr(query_item->data_ptr +
84 sizeof(topo) +
85 slice_length + subslice_length),
86 sseu))
87 return -EFAULT;
88
89 return total_length;
90}
91
92static int query_topology_info(struct drm_i915_private *dev_priv,
93 struct drm_i915_query_item *query_item)
94{
95 const struct sseu_dev_info *sseu = &to_gt(i915: dev_priv)->info.sseu;
96
97 if (query_item->flags != 0)
98 return -EINVAL;
99
100 return fill_topology_info(sseu, query_item, subslice_mask: sseu->subslice_mask);
101}
102
103static int query_geometry_subslices(struct drm_i915_private *i915,
104 struct drm_i915_query_item *query_item)
105{
106 const struct sseu_dev_info *sseu;
107 struct intel_engine_cs *engine;
108 struct i915_engine_class_instance classinstance;
109
110 if (GRAPHICS_VER_FULL(i915) < IP_VER(12, 55))
111 return -ENODEV;
112
113 classinstance = *((struct i915_engine_class_instance *)&query_item->flags);
114
115 engine = intel_engine_lookup_user(i915, class: (u8)classinstance.engine_class,
116 instance: (u8)classinstance.engine_instance);
117
118 if (!engine)
119 return -EINVAL;
120
121 if (engine->class != RENDER_CLASS)
122 return -EINVAL;
123
124 sseu = &engine->gt->info.sseu;
125
126 return fill_topology_info(sseu, query_item, subslice_mask: sseu->geometry_subslice_mask);
127}
128
129static int
130query_engine_info(struct drm_i915_private *i915,
131 struct drm_i915_query_item *query_item)
132{
133 struct drm_i915_query_engine_info __user *query_ptr =
134 u64_to_user_ptr(query_item->data_ptr);
135 struct drm_i915_engine_info __user *info_ptr;
136 struct drm_i915_query_engine_info query;
137 struct drm_i915_engine_info info = { };
138 unsigned int num_uabi_engines = 0;
139 struct intel_engine_cs *engine;
140 int len, ret;
141
142 if (query_item->flags)
143 return -EINVAL;
144
145 for_each_uabi_engine(engine, i915)
146 num_uabi_engines++;
147
148 len = struct_size(query_ptr, engines, num_uabi_engines);
149
150 ret = copy_query_item(query_hdr: &query, query_sz: sizeof(query), total_length: len, query_item);
151 if (ret != 0)
152 return ret;
153
154 if (query.num_engines || query.rsvd[0] || query.rsvd[1] ||
155 query.rsvd[2])
156 return -EINVAL;
157
158 info_ptr = &query_ptr->engines[0];
159
160 for_each_uabi_engine(engine, i915) {
161 info.engine.engine_class = engine->uabi_class;
162 info.engine.engine_instance = engine->uabi_instance;
163 info.flags = I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE;
164 info.capabilities = engine->uabi_capabilities;
165 info.logical_instance = ilog2(engine->logical_mask);
166
167 if (copy_to_user(to: info_ptr, from: &info, n: sizeof(info)))
168 return -EFAULT;
169
170 query.num_engines++;
171 info_ptr++;
172 }
173
174 if (copy_to_user(to: query_ptr, from: &query, n: sizeof(query)))
175 return -EFAULT;
176
177 return len;
178}
179
180static int can_copy_perf_config_registers_or_number(u32 user_n_regs,
181 u64 user_regs_ptr,
182 u32 kernel_n_regs)
183{
184 /*
185 * We'll just put the number of registers, and won't copy the
186 * register.
187 */
188 if (user_n_regs == 0)
189 return 0;
190
191 if (user_n_regs < kernel_n_regs)
192 return -EINVAL;
193
194 return 0;
195}
196
197static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs,
198 u32 kernel_n_regs,
199 u64 user_regs_ptr,
200 u32 *user_n_regs)
201{
202 u32 __user *p = u64_to_user_ptr(user_regs_ptr);
203 u32 r;
204
205 if (*user_n_regs == 0) {
206 *user_n_regs = kernel_n_regs;
207 return 0;
208 }
209
210 *user_n_regs = kernel_n_regs;
211
212 if (!user_write_access_begin(p, 2 * sizeof(u32) * kernel_n_regs))
213 return -EFAULT;
214
215 for (r = 0; r < kernel_n_regs; r++, p += 2) {
216 unsafe_put_user(i915_mmio_reg_offset(kernel_regs[r].addr),
217 p, Efault);
218 unsafe_put_user(kernel_regs[r].value, p + 1, Efault);
219 }
220 user_write_access_end();
221 return 0;
222Efault:
223 user_write_access_end();
224 return -EFAULT;
225}
226
227static int query_perf_config_data(struct drm_i915_private *i915,
228 struct drm_i915_query_item *query_item,
229 bool use_uuid)
230{
231 struct drm_i915_query_perf_config __user *user_query_config_ptr =
232 u64_to_user_ptr(query_item->data_ptr);
233 struct drm_i915_perf_oa_config __user *user_config_ptr =
234 u64_to_user_ptr(query_item->data_ptr +
235 sizeof(struct drm_i915_query_perf_config));
236 struct drm_i915_perf_oa_config user_config;
237 struct i915_perf *perf = &i915->perf;
238 struct i915_oa_config *oa_config;
239 char uuid[UUID_STRING_LEN + 1];
240 u64 config_id;
241 u32 flags, total_size;
242 int ret;
243
244 if (!perf->i915)
245 return -ENODEV;
246
247 total_size =
248 sizeof(struct drm_i915_query_perf_config) +
249 sizeof(struct drm_i915_perf_oa_config);
250
251 if (query_item->length == 0)
252 return total_size;
253
254 if (query_item->length < total_size) {
255 drm_dbg(&i915->drm,
256 "Invalid query config data item size=%u expected=%u\n",
257 query_item->length, total_size);
258 return -EINVAL;
259 }
260
261 if (get_user(flags, &user_query_config_ptr->flags))
262 return -EFAULT;
263
264 if (flags != 0)
265 return -EINVAL;
266
267 if (use_uuid) {
268 struct i915_oa_config *tmp;
269 int id;
270
271 BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid));
272
273 memset(&uuid, 0, sizeof(uuid));
274 if (copy_from_user(to: uuid, from: user_query_config_ptr->uuid,
275 n: sizeof(user_query_config_ptr->uuid)))
276 return -EFAULT;
277
278 oa_config = NULL;
279 rcu_read_lock();
280 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
281 if (!strcmp(tmp->uuid, uuid)) {
282 oa_config = i915_oa_config_get(oa_config: tmp);
283 break;
284 }
285 }
286 rcu_read_unlock();
287 } else {
288 if (get_user(config_id, &user_query_config_ptr->config))
289 return -EFAULT;
290
291 oa_config = i915_perf_get_oa_config(perf, metrics_set: config_id);
292 }
293 if (!oa_config)
294 return -ENOENT;
295
296 if (copy_from_user(to: &user_config, from: user_config_ptr, n: sizeof(user_config))) {
297 ret = -EFAULT;
298 goto out;
299 }
300
301 ret = can_copy_perf_config_registers_or_number(user_n_regs: user_config.n_boolean_regs,
302 user_regs_ptr: user_config.boolean_regs_ptr,
303 kernel_n_regs: oa_config->b_counter_regs_len);
304 if (ret)
305 goto out;
306
307 ret = can_copy_perf_config_registers_or_number(user_n_regs: user_config.n_flex_regs,
308 user_regs_ptr: user_config.flex_regs_ptr,
309 kernel_n_regs: oa_config->flex_regs_len);
310 if (ret)
311 goto out;
312
313 ret = can_copy_perf_config_registers_or_number(user_n_regs: user_config.n_mux_regs,
314 user_regs_ptr: user_config.mux_regs_ptr,
315 kernel_n_regs: oa_config->mux_regs_len);
316 if (ret)
317 goto out;
318
319 ret = copy_perf_config_registers_or_number(kernel_regs: oa_config->b_counter_regs,
320 kernel_n_regs: oa_config->b_counter_regs_len,
321 user_regs_ptr: user_config.boolean_regs_ptr,
322 user_n_regs: &user_config.n_boolean_regs);
323 if (ret)
324 goto out;
325
326 ret = copy_perf_config_registers_or_number(kernel_regs: oa_config->flex_regs,
327 kernel_n_regs: oa_config->flex_regs_len,
328 user_regs_ptr: user_config.flex_regs_ptr,
329 user_n_regs: &user_config.n_flex_regs);
330 if (ret)
331 goto out;
332
333 ret = copy_perf_config_registers_or_number(kernel_regs: oa_config->mux_regs,
334 kernel_n_regs: oa_config->mux_regs_len,
335 user_regs_ptr: user_config.mux_regs_ptr,
336 user_n_regs: &user_config.n_mux_regs);
337 if (ret)
338 goto out;
339
340 memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid));
341
342 if (copy_to_user(to: user_config_ptr, from: &user_config, n: sizeof(user_config))) {
343 ret = -EFAULT;
344 goto out;
345 }
346
347 ret = total_size;
348
349out:
350 i915_oa_config_put(oa_config);
351 return ret;
352}
353
354static size_t sizeof_perf_config_list(size_t count)
355{
356 return sizeof(struct drm_i915_query_perf_config) + sizeof(u64) * count;
357}
358
359static size_t sizeof_perf_metrics(struct i915_perf *perf)
360{
361 struct i915_oa_config *tmp;
362 size_t i;
363 int id;
364
365 i = 1;
366 rcu_read_lock();
367 idr_for_each_entry(&perf->metrics_idr, tmp, id)
368 i++;
369 rcu_read_unlock();
370
371 return sizeof_perf_config_list(count: i);
372}
373
374static int query_perf_config_list(struct drm_i915_private *i915,
375 struct drm_i915_query_item *query_item)
376{
377 struct drm_i915_query_perf_config __user *user_query_config_ptr =
378 u64_to_user_ptr(query_item->data_ptr);
379 struct i915_perf *perf = &i915->perf;
380 u64 *oa_config_ids = NULL;
381 int alloc, n_configs;
382 u32 flags;
383 int ret;
384
385 if (!perf->i915)
386 return -ENODEV;
387
388 if (query_item->length == 0)
389 return sizeof_perf_metrics(perf);
390
391 if (get_user(flags, &user_query_config_ptr->flags))
392 return -EFAULT;
393
394 if (flags != 0)
395 return -EINVAL;
396
397 n_configs = 1;
398 do {
399 struct i915_oa_config *tmp;
400 u64 *ids;
401 int id;
402
403 ids = krealloc(oa_config_ids,
404 n_configs * sizeof(*oa_config_ids),
405 GFP_KERNEL);
406 if (!ids)
407 return -ENOMEM;
408
409 alloc = fetch_and_zero(&n_configs);
410
411 ids[n_configs++] = 1ull; /* reserved for test_config */
412 rcu_read_lock();
413 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
414 if (n_configs < alloc)
415 ids[n_configs] = id;
416 n_configs++;
417 }
418 rcu_read_unlock();
419
420 oa_config_ids = ids;
421 } while (n_configs > alloc);
422
423 if (query_item->length < sizeof_perf_config_list(count: n_configs)) {
424 drm_dbg(&i915->drm,
425 "Invalid query config list item size=%u expected=%zu\n",
426 query_item->length,
427 sizeof_perf_config_list(n_configs));
428 kfree(objp: oa_config_ids);
429 return -EINVAL;
430 }
431
432 if (put_user(n_configs, &user_query_config_ptr->config)) {
433 kfree(objp: oa_config_ids);
434 return -EFAULT;
435 }
436
437 ret = copy_to_user(to: user_query_config_ptr + 1,
438 from: oa_config_ids,
439 n: n_configs * sizeof(*oa_config_ids));
440 kfree(objp: oa_config_ids);
441 if (ret)
442 return -EFAULT;
443
444 return sizeof_perf_config_list(count: n_configs);
445}
446
447static int query_perf_config(struct drm_i915_private *i915,
448 struct drm_i915_query_item *query_item)
449{
450 switch (query_item->flags) {
451 case DRM_I915_QUERY_PERF_CONFIG_LIST:
452 return query_perf_config_list(i915, query_item);
453 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID:
454 return query_perf_config_data(i915, query_item, use_uuid: true);
455 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID:
456 return query_perf_config_data(i915, query_item, use_uuid: false);
457 default:
458 return -EINVAL;
459 }
460}
461
462static int query_memregion_info(struct drm_i915_private *i915,
463 struct drm_i915_query_item *query_item)
464{
465 struct drm_i915_query_memory_regions __user *query_ptr =
466 u64_to_user_ptr(query_item->data_ptr);
467 struct drm_i915_memory_region_info __user *info_ptr =
468 &query_ptr->regions[0];
469 struct drm_i915_memory_region_info info = { };
470 struct drm_i915_query_memory_regions query;
471 struct intel_memory_region *mr;
472 u32 total_length;
473 int ret, id, i;
474
475 if (query_item->flags != 0)
476 return -EINVAL;
477
478 total_length = sizeof(query);
479 for_each_memory_region(mr, i915, id) {
480 if (mr->private)
481 continue;
482
483 total_length += sizeof(info);
484 }
485
486 ret = copy_query_item(query_hdr: &query, query_sz: sizeof(query), total_length, query_item);
487 if (ret != 0)
488 return ret;
489
490 if (query.num_regions)
491 return -EINVAL;
492
493 for (i = 0; i < ARRAY_SIZE(query.rsvd); i++) {
494 if (query.rsvd[i])
495 return -EINVAL;
496 }
497
498 for_each_memory_region(mr, i915, id) {
499 if (mr->private)
500 continue;
501
502 info.region.memory_class = mr->type;
503 info.region.memory_instance = mr->instance;
504 info.probed_size = mr->total;
505
506 if (mr->type == INTEL_MEMORY_LOCAL)
507 info.probed_cpu_visible_size = resource_size(res: &mr->io);
508 else
509 info.probed_cpu_visible_size = mr->total;
510
511 if (perfmon_capable()) {
512 intel_memory_region_avail(mr,
513 avail: &info.unallocated_size,
514 visible_avail: &info.unallocated_cpu_visible_size);
515 } else {
516 info.unallocated_size = info.probed_size;
517 info.unallocated_cpu_visible_size =
518 info.probed_cpu_visible_size;
519 }
520
521 if (__copy_to_user(to: info_ptr, from: &info, n: sizeof(info)))
522 return -EFAULT;
523
524 query.num_regions++;
525 info_ptr++;
526 }
527
528 if (__copy_to_user(to: query_ptr, from: &query, n: sizeof(query)))
529 return -EFAULT;
530
531 return total_length;
532}
533
534static int query_hwconfig_blob(struct drm_i915_private *i915,
535 struct drm_i915_query_item *query_item)
536{
537 struct intel_gt *gt = to_gt(i915);
538 struct intel_hwconfig *hwconfig = &gt->info.hwconfig;
539
540 if (!hwconfig->size || !hwconfig->ptr)
541 return -ENODEV;
542
543 if (query_item->length == 0)
544 return hwconfig->size;
545
546 if (query_item->length < hwconfig->size)
547 return -EINVAL;
548
549 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
550 from: hwconfig->ptr, n: hwconfig->size))
551 return -EFAULT;
552
553 return hwconfig->size;
554}
555
556static int
557query_guc_submission_version(struct drm_i915_private *i915,
558 struct drm_i915_query_item *query)
559{
560 struct drm_i915_query_guc_submission_version __user *query_ptr =
561 u64_to_user_ptr(query->data_ptr);
562 struct drm_i915_query_guc_submission_version ver;
563 struct intel_guc *guc = &to_gt(i915)->uc.guc;
564 const size_t size = sizeof(ver);
565 int ret;
566
567 if (!intel_uc_uses_guc_submission(uc: &to_gt(i915)->uc))
568 return -ENODEV;
569
570 ret = copy_query_item(query_hdr: &ver, query_sz: size, total_length: size, query_item: query);
571 if (ret != 0)
572 return ret;
573
574 if (ver.branch || ver.major || ver.minor || ver.patch)
575 return -EINVAL;
576
577 ver.branch = 0;
578 ver.major = guc->submission_version.major;
579 ver.minor = guc->submission_version.minor;
580 ver.patch = guc->submission_version.patch;
581
582 if (copy_to_user(to: query_ptr, from: &ver, n: size))
583 return -EFAULT;
584
585 return 0;
586}
587
588static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
589 struct drm_i915_query_item *query_item) = {
590 query_topology_info,
591 query_engine_info,
592 query_perf_config,
593 query_memregion_info,
594 query_hwconfig_blob,
595 query_geometry_subslices,
596 query_guc_submission_version,
597};
598
599int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
600{
601 struct drm_i915_private *dev_priv = to_i915(dev);
602 struct drm_i915_query *args = data;
603 struct drm_i915_query_item __user *user_item_ptr =
604 u64_to_user_ptr(args->items_ptr);
605 u32 i;
606
607 if (args->flags != 0)
608 return -EINVAL;
609
610 for (i = 0; i < args->num_items; i++, user_item_ptr++) {
611 struct drm_i915_query_item item;
612 unsigned long func_idx;
613 int ret;
614
615 if (copy_from_user(to: &item, from: user_item_ptr, n: sizeof(item)))
616 return -EFAULT;
617
618 if (item.query_id == 0)
619 return -EINVAL;
620
621 if (overflows_type(item.query_id - 1, unsigned long))
622 return -EINVAL;
623
624 func_idx = item.query_id - 1;
625
626 ret = -EINVAL;
627 if (func_idx < ARRAY_SIZE(i915_query_funcs)) {
628 func_idx = array_index_nospec(func_idx,
629 ARRAY_SIZE(i915_query_funcs));
630 ret = i915_query_funcs[func_idx](dev_priv, &item);
631 }
632
633 /* Only write the length back to userspace if they differ. */
634 if (ret != item.length && put_user(ret, &user_item_ptr->length))
635 return -EFAULT;
636 }
637
638 return 0;
639}
640

source code of linux/drivers/gpu/drm/i915/i915_query.c