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),
31 static int query_topology_info(struct drm_i915_private *dev_priv,
32 struct drm_i915_query_item *query_item)
34 const struct sseu_dev_info *sseu = &dev_priv->gt.info.sseu;
35 struct drm_i915_query_topology_info topo;
36 u32 slice_length, subslice_length, eu_length, total_length;
39 if (query_item->flags != 0)
42 if (sseu->max_slices == 0)
45 BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
47 slice_length = sizeof(sseu->slice_mask);
48 subslice_length = sseu->max_slices * sseu->ss_stride;
49 eu_length = sseu->max_slices * sseu->max_subslices * sseu->eu_stride;
50 total_length = sizeof(topo) + slice_length + subslice_length +
53 ret = copy_query_item(&topo, sizeof(topo), total_length,
61 memset(&topo, 0, sizeof(topo));
62 topo.max_slices = sseu->max_slices;
63 topo.max_subslices = sseu->max_subslices;
64 topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
66 topo.subslice_offset = slice_length;
67 topo.subslice_stride = sseu->ss_stride;
68 topo.eu_offset = slice_length + subslice_length;
69 topo.eu_stride = sseu->eu_stride;
71 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
75 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)),
76 &sseu->slice_mask, slice_length))
79 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr +
80 sizeof(topo) + slice_length),
81 sseu->subslice_mask, subslice_length))
84 if (copy_to_user(u64_to_user_ptr(query_item->data_ptr +
86 slice_length + subslice_length),
87 sseu->eu_mask, eu_length))
94 query_engine_info(struct drm_i915_private *i915,
95 struct drm_i915_query_item *query_item)
97 struct drm_i915_query_engine_info __user *query_ptr =
98 u64_to_user_ptr(query_item->data_ptr);
99 struct drm_i915_engine_info __user *info_ptr;
100 struct drm_i915_query_engine_info query;
101 struct drm_i915_engine_info info = { };
102 unsigned int num_uabi_engines = 0;
103 struct intel_engine_cs *engine;
106 if (query_item->flags)
109 for_each_uabi_engine(engine, i915)
112 len = struct_size(query_ptr, engines, num_uabi_engines);
114 ret = copy_query_item(&query, sizeof(query), len, query_item);
118 if (query.num_engines || query.rsvd[0] || query.rsvd[1] ||
122 info_ptr = &query_ptr->engines[0];
124 for_each_uabi_engine(engine, i915) {
125 info.engine.engine_class = engine->uabi_class;
126 info.engine.engine_instance = engine->uabi_instance;
127 info.capabilities = engine->uabi_capabilities;
129 if (copy_to_user(info_ptr, &info, sizeof(info)))
136 if (copy_to_user(query_ptr, &query, sizeof(query)))
142 static int can_copy_perf_config_registers_or_number(u32 user_n_regs,
147 * We'll just put the number of registers, and won't copy the
150 if (user_n_regs == 0)
153 if (user_n_regs < kernel_n_regs)
159 static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs,
164 u32 __user *p = u64_to_user_ptr(user_regs_ptr);
167 if (*user_n_regs == 0) {
168 *user_n_regs = kernel_n_regs;
172 *user_n_regs = kernel_n_regs;
174 if (!user_write_access_begin(p, 2 * sizeof(u32) * kernel_n_regs))
177 for (r = 0; r < kernel_n_regs; r++, p += 2) {
178 unsafe_put_user(i915_mmio_reg_offset(kernel_regs[r].addr),
180 unsafe_put_user(kernel_regs[r].value, p + 1, Efault);
182 user_write_access_end();
185 user_write_access_end();
189 static int query_perf_config_data(struct drm_i915_private *i915,
190 struct drm_i915_query_item *query_item,
193 struct drm_i915_query_perf_config __user *user_query_config_ptr =
194 u64_to_user_ptr(query_item->data_ptr);
195 struct drm_i915_perf_oa_config __user *user_config_ptr =
196 u64_to_user_ptr(query_item->data_ptr +
197 sizeof(struct drm_i915_query_perf_config));
198 struct drm_i915_perf_oa_config user_config;
199 struct i915_perf *perf = &i915->perf;
200 struct i915_oa_config *oa_config;
201 char uuid[UUID_STRING_LEN + 1];
203 u32 flags, total_size;
210 sizeof(struct drm_i915_query_perf_config) +
211 sizeof(struct drm_i915_perf_oa_config);
213 if (query_item->length == 0)
216 if (query_item->length < total_size) {
217 DRM_DEBUG("Invalid query config data item size=%u expected=%u\n",
218 query_item->length, total_size);
222 if (get_user(flags, &user_query_config_ptr->flags))
229 struct i915_oa_config *tmp;
232 BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid));
234 memset(&uuid, 0, sizeof(uuid));
235 if (copy_from_user(uuid, user_query_config_ptr->uuid,
236 sizeof(user_query_config_ptr->uuid)))
241 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
242 if (!strcmp(tmp->uuid, uuid)) {
243 oa_config = i915_oa_config_get(tmp);
249 if (get_user(config_id, &user_query_config_ptr->config))
252 oa_config = i915_perf_get_oa_config(perf, config_id);
257 if (copy_from_user(&user_config, user_config_ptr, sizeof(user_config))) {
262 ret = can_copy_perf_config_registers_or_number(user_config.n_boolean_regs,
263 user_config.boolean_regs_ptr,
264 oa_config->b_counter_regs_len);
268 ret = can_copy_perf_config_registers_or_number(user_config.n_flex_regs,
269 user_config.flex_regs_ptr,
270 oa_config->flex_regs_len);
274 ret = can_copy_perf_config_registers_or_number(user_config.n_mux_regs,
275 user_config.mux_regs_ptr,
276 oa_config->mux_regs_len);
280 ret = copy_perf_config_registers_or_number(oa_config->b_counter_regs,
281 oa_config->b_counter_regs_len,
282 user_config.boolean_regs_ptr,
283 &user_config.n_boolean_regs);
287 ret = copy_perf_config_registers_or_number(oa_config->flex_regs,
288 oa_config->flex_regs_len,
289 user_config.flex_regs_ptr,
290 &user_config.n_flex_regs);
294 ret = copy_perf_config_registers_or_number(oa_config->mux_regs,
295 oa_config->mux_regs_len,
296 user_config.mux_regs_ptr,
297 &user_config.n_mux_regs);
301 memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid));
303 if (copy_to_user(user_config_ptr, &user_config, sizeof(user_config))) {
311 i915_oa_config_put(oa_config);
315 static size_t sizeof_perf_config_list(size_t count)
317 return sizeof(struct drm_i915_query_perf_config) + sizeof(u64) * count;
320 static size_t sizeof_perf_metrics(struct i915_perf *perf)
322 struct i915_oa_config *tmp;
328 idr_for_each_entry(&perf->metrics_idr, tmp, id)
332 return sizeof_perf_config_list(i);
335 static int query_perf_config_list(struct drm_i915_private *i915,
336 struct drm_i915_query_item *query_item)
338 struct drm_i915_query_perf_config __user *user_query_config_ptr =
339 u64_to_user_ptr(query_item->data_ptr);
340 struct i915_perf *perf = &i915->perf;
341 u64 *oa_config_ids = NULL;
342 int alloc, n_configs;
349 if (query_item->length == 0)
350 return sizeof_perf_metrics(perf);
352 if (get_user(flags, &user_query_config_ptr->flags))
360 struct i915_oa_config *tmp;
364 ids = krealloc(oa_config_ids,
365 n_configs * sizeof(*oa_config_ids),
370 alloc = fetch_and_zero(&n_configs);
372 ids[n_configs++] = 1ull; /* reserved for test_config */
374 idr_for_each_entry(&perf->metrics_idr, tmp, id) {
375 if (n_configs < alloc)
382 } while (n_configs > alloc);
384 if (query_item->length < sizeof_perf_config_list(n_configs)) {
385 DRM_DEBUG("Invalid query config list item size=%u expected=%zu\n",
387 sizeof_perf_config_list(n_configs));
388 kfree(oa_config_ids);
392 if (put_user(n_configs, &user_query_config_ptr->config)) {
393 kfree(oa_config_ids);
397 ret = copy_to_user(user_query_config_ptr + 1,
399 n_configs * sizeof(*oa_config_ids));
400 kfree(oa_config_ids);
404 return sizeof_perf_config_list(n_configs);
407 static int query_perf_config(struct drm_i915_private *i915,
408 struct drm_i915_query_item *query_item)
410 switch (query_item->flags) {
411 case DRM_I915_QUERY_PERF_CONFIG_LIST:
412 return query_perf_config_list(i915, query_item);
413 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID:
414 return query_perf_config_data(i915, query_item, true);
415 case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID:
416 return query_perf_config_data(i915, query_item, false);
422 static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
423 struct drm_i915_query_item *query_item) = {
429 int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
431 struct drm_i915_private *dev_priv = to_i915(dev);
432 struct drm_i915_query *args = data;
433 struct drm_i915_query_item __user *user_item_ptr =
434 u64_to_user_ptr(args->items_ptr);
437 if (args->flags != 0)
440 for (i = 0; i < args->num_items; i++, user_item_ptr++) {
441 struct drm_i915_query_item item;
442 unsigned long func_idx;
445 if (copy_from_user(&item, user_item_ptr, sizeof(item)))
448 if (item.query_id == 0)
451 if (overflows_type(item.query_id - 1, unsigned long))
454 func_idx = item.query_id - 1;
457 if (func_idx < ARRAY_SIZE(i915_query_funcs)) {
458 func_idx = array_index_nospec(func_idx,
459 ARRAY_SIZE(i915_query_funcs));
460 ret = i915_query_funcs[func_idx](dev_priv, &item);
463 /* Only write the length back to userspace if they differ. */
464 if (ret != item.length && put_user(ret, &user_item_ptr->length))