2 * SPDX-License-Identifier: MIT
4 * Copyright © 2018 Intel Corporation
7 #include <linux/nospec.h>
10 #include "i915_perf.h"
11 #include "i915_query.h"
12 #include <uapi/drm/i915_drm.h>
14 static int copy_query_item(void *query_hdr, size_t query_sz,
16 struct drm_i915_query_item *query_item)
18 if (query_item->length == 0)
21 if (query_item->length < total_length)
24 if (copy_from_user(query_hdr, u64_to_user_ptr(query_item->data_ptr),
28 if (!access_ok(u64_to_user_ptr(query_item->data_ptr),
35 static int query_topology_info(struct drm_i915_private *dev_priv,
36 struct drm_i915_query_item *query_item)
38 const struct sseu_dev_info *sseu = &RUNTIME_INFO(dev_priv)->sseu;
39 struct drm_i915_query_topology_info topo;
40 u32 slice_length, subslice_length, eu_length, total_length;
43 if (query_item->flags != 0)
46 if (sseu->max_slices == 0)
49 BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
51 slice_length = sizeof(sseu->slice_mask);
52 subslice_length = sseu->max_slices * sseu->ss_stride;
53 eu_length = sseu->max_slices * sseu->max_subslices * sseu->eu_stride;
54 total_length = sizeof(topo) + slice_length + subslice_length +
57 ret = copy_query_item(&topo, sizeof(topo), total_length,
65 memset(&topo, 0, sizeof(topo));
66 topo.max_slices = sseu->max_slices;
67 topo.max_subslices = sseu->max_subslices;
68 topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
70 topo.subslice_offset = slice_length;
71 topo.subslice_stride = sseu->ss_stride;
72 topo.eu_offset = slice_length + subslice_length;
73 topo.eu_stride = sseu->eu_stride;
75 if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr),
79 if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)),
80 &sseu->slice_mask, slice_length))
83 if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr +
84 sizeof(topo) + slice_length),
85 sseu->subslice_mask, subslice_length))
88 if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr +
90 slice_length + subslice_length),
91 sseu->eu_mask, eu_length))
98 query_engine_info(struct drm_i915_private *i915,
99 struct drm_i915_query_item *query_item)
101 struct drm_i915_query_engine_info __user *query_ptr =
102 u64_to_user_ptr(query_item->data_ptr);
103 struct drm_i915_engine_info __user *info_ptr;
104 struct drm_i915_query_engine_info query;
105 struct drm_i915_engine_info info = { };
106 struct intel_engine_cs *engine;
109 if (query_item->flags)
112 len = sizeof(struct drm_i915_query_engine_info) +
113 RUNTIME_INFO(i915)->num_engines *
114 sizeof(struct drm_i915_engine_info);
116 ret = copy_query_item(&query, sizeof(query), len, query_item);
120 if (query.num_engines || query.rsvd[0] || query.rsvd[1] ||
124 info_ptr = &query_ptr->engines[0];
126 for_each_uabi_engine(engine, i915) {
127 info.engine.engine_class = engine->uabi_class;
128 info.engine.engine_instance = engine->uabi_instance;
129 info.capabilities = engine->uabi_capabilities;
131 if (__copy_to_user(info_ptr, &info, sizeof(info)))
138 if (__copy_to_user(query_ptr, &query, sizeof(query)))
144 static int can_copy_perf_config_registers_or_number(u32 user_n_regs,
149 * We'll just put the number of registers, and won't copy the
152 if (user_n_regs == 0)
155 if (user_n_regs < kernel_n_regs)
158 if (!access_ok(u64_to_user_ptr(user_regs_ptr),
159 2 * sizeof(u32) * kernel_n_regs))
165 static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs,
172 if (*user_n_regs == 0) {
173 *user_n_regs = kernel_n_regs;
177 *user_n_regs = kernel_n_regs;
179 for (r = 0; r < kernel_n_regs; r++) {
180 u32 __user *user_reg_ptr =
181 u64_to_user_ptr(user_regs_ptr + sizeof(u32) * r * 2);
182 u32 __user *user_val_ptr =
183 u64_to_user_ptr(user_regs_ptr + sizeof(u32) * r * 2 +
187 ret = __put_user(i915_mmio_reg_offset(kernel_regs[r].addr),
192 ret = __put_user(kernel_regs[r].value, user_val_ptr);
200 static int query_perf_config_data(struct drm_i915_private *i915,
201 struct drm_i915_query_item *query_item,
204 struct drm_i915_query_perf_config __user *user_query_config_ptr =
205 u64_to_user_ptr(query_item->data_ptr);
206 struct drm_i915_perf_oa_config __user *user_config_ptr =
207 u64_to_user_ptr(query_item->data_ptr +
208 sizeof(struct drm_i915_query_perf_config));
209 struct drm_i915_perf_oa_config user_config;
210 struct i915_perf *perf = &i915->perf;
211 struct i915_oa_config *oa_config;
212 char uuid[UUID_STRING_LEN + 1];
214 u32 flags, total_size;
221 sizeof(struct drm_i915_query_perf_config) +
222 sizeof(struct drm_i915_perf_oa_config);
224 if (query_item->length == 0)
227 if (query_item->length < total_size) {
228 DRM_DEBUG("Invalid query config data item size=%u expected=%u\n",
229 query_item->length, total_size);
233 if (!access_ok(user_query_config_ptr, total_size))
236 if (__get_user(flags, &user_query_config_ptr->flags))
243 struct i915_oa_config *tmp;
246 BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid));
248 memset(&uuid, 0, sizeof(uuid));
249 if (__copy_from_user(uuid, user_query_config_ptr->uuid,
250 sizeof(user_query_config_ptr->uuid)))
255 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
256 if (!strcmp(tmp->uuid, uuid)) {
257 oa_config = i915_oa_config_get(tmp);
263 if (__get_user(config_id, &user_query_config_ptr->config))
266 oa_config = i915_perf_get_oa_config(perf, config_id);
271 if (__copy_from_user(&user_config, user_config_ptr,
272 sizeof(user_config))) {
277 ret = can_copy_perf_config_registers_or_number(user_config.n_boolean_regs,
278 user_config.boolean_regs_ptr,
279 oa_config->b_counter_regs_len);
283 ret = can_copy_perf_config_registers_or_number(user_config.n_flex_regs,
284 user_config.flex_regs_ptr,
285 oa_config->flex_regs_len);
289 ret = can_copy_perf_config_registers_or_number(user_config.n_mux_regs,
290 user_config.mux_regs_ptr,
291 oa_config->mux_regs_len);
295 ret = copy_perf_config_registers_or_number(oa_config->b_counter_regs,
296 oa_config->b_counter_regs_len,
297 user_config.boolean_regs_ptr,
298 &user_config.n_boolean_regs);
302 ret = copy_perf_config_registers_or_number(oa_config->flex_regs,
303 oa_config->flex_regs_len,
304 user_config.flex_regs_ptr,
305 &user_config.n_flex_regs);
309 ret = copy_perf_config_registers_or_number(oa_config->mux_regs,
310 oa_config->mux_regs_len,
311 user_config.mux_regs_ptr,
312 &user_config.n_mux_regs);
316 memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid));
318 if (__copy_to_user(user_config_ptr, &user_config,
319 sizeof(user_config))) {
327 i915_oa_config_put(oa_config);
331 static size_t sizeof_perf_config_list(size_t count)
333 return sizeof(struct drm_i915_query_perf_config) + sizeof(u64) * count;
336 static size_t sizeof_perf_metrics(struct i915_perf *perf)
338 struct i915_oa_config *tmp;
344 idr_for_each_entry(&perf->metrics_idr, tmp, id)
348 return sizeof_perf_config_list(i);
351 static int query_perf_config_list(struct drm_i915_private *i915,
352 struct drm_i915_query_item *query_item)
354 struct drm_i915_query_perf_config __user *user_query_config_ptr =
355 u64_to_user_ptr(query_item->data_ptr);
356 struct i915_perf *perf = &i915->perf;
357 u64 *oa_config_ids = NULL;
358 int alloc, n_configs;
365 if (query_item->length == 0)
366 return sizeof_perf_metrics(perf);
368 if (get_user(flags, &user_query_config_ptr->flags))
376 struct i915_oa_config *tmp;
380 ids = krealloc(oa_config_ids,
381 n_configs * sizeof(*oa_config_ids),
386 alloc = fetch_and_zero(&n_configs);
388 ids[n_configs++] = 1ull; /* reserved for test_config */
390 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
391 if (n_configs < alloc)
398 } while (n_configs > alloc);
400 if (query_item->length < sizeof_perf_config_list(n_configs)) {
401 DRM_DEBUG("Invalid query config list item size=%u expected=%zu\n",
403 sizeof_perf_config_list(n_configs));
404 kfree(oa_config_ids);
408 if (put_user(n_configs, &user_query_config_ptr->config)) {
409 kfree(oa_config_ids);
413 ret = copy_to_user(user_query_config_ptr + 1,
415 n_configs * sizeof(*oa_config_ids));
416 kfree(oa_config_ids);
420 return sizeof_perf_config_list(n_configs);
423 static int query_perf_config(struct drm_i915_private *i915,
424 struct drm_i915_query_item *query_item)
426 switch (query_item->flags) {
427 case DRM_I915_QUERY_PERF_CONFIG_LIST:
428 return query_perf_config_list(i915, query_item);
429 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID:
430 return query_perf_config_data(i915, query_item, true);
431 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID:
432 return query_perf_config_data(i915, query_item, false);
438 static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
439 struct drm_i915_query_item *query_item) = {
445 int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
447 struct drm_i915_private *dev_priv = to_i915(dev);
448 struct drm_i915_query *args = data;
449 struct drm_i915_query_item __user *user_item_ptr =
450 u64_to_user_ptr(args->items_ptr);
453 if (args->flags != 0)
456 for (i = 0; i < args->num_items; i++, user_item_ptr++) {
457 struct drm_i915_query_item item;
458 unsigned long func_idx;
461 if (copy_from_user(&item, user_item_ptr, sizeof(item)))
464 if (item.query_id == 0)
467 if (overflows_type(item.query_id - 1, unsigned long))
470 func_idx = item.query_id - 1;
473 if (func_idx < ARRAY_SIZE(i915_query_funcs)) {
474 func_idx = array_index_nospec(func_idx,
475 ARRAY_SIZE(i915_query_funcs));
476 ret = i915_query_funcs[func_idx](dev_priv, &item);
479 /* Only write the length back to userspace if they differ. */
480 if (ret != item.length && put_user(ret, &user_item_ptr->length))