2 * SPDX-License-Identifier: MIT
4 * Copyright © 2019 Intel Corporation
7 #include "gt/intel_engine_pm.h"
8 #include "i915_selftest.h"
10 #include "gem/selftests/mock_context.h"
11 #include "selftests/igt_reset.h"
12 #include "selftests/igt_spinner.h"
15 struct drm_i915_mocs_table table;
16 struct i915_vma *scratch;
20 static int request_add_sync(struct i915_request *rq, int err)
24 if (i915_request_wait(rq, 0, HZ / 5) < 0)
31 static int request_add_spin(struct i915_request *rq, struct igt_spinner *spin)
37 if (spin && !igt_wait_for_spinner(spin, rq))
44 static struct i915_vma *create_scratch(struct intel_gt *gt)
46 struct drm_i915_gem_object *obj;
50 obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
54 i915_gem_object_set_cache_coherency(obj, I915_CACHING_CACHED);
56 vma = i915_vma_instance(obj, >->ggtt->vm, NULL);
58 i915_gem_object_put(obj);
62 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
64 i915_gem_object_put(obj);
71 static int live_mocs_init(struct live_mocs *arg, struct intel_gt *gt)
75 if (!get_mocs_settings(gt->i915, &arg->table))
78 arg->scratch = create_scratch(gt);
79 if (IS_ERR(arg->scratch))
80 return PTR_ERR(arg->scratch);
82 arg->vaddr = i915_gem_object_pin_map(arg->scratch->obj, I915_MAP_WB);
83 if (IS_ERR(arg->vaddr)) {
84 err = PTR_ERR(arg->vaddr);
91 i915_vma_unpin_and_release(&arg->scratch, 0);
95 static void live_mocs_fini(struct live_mocs *arg)
97 i915_vma_unpin_and_release(&arg->scratch, I915_VMA_RELEASE_MAP);
100 static int read_regs(struct i915_request *rq,
101 u32 addr, unsigned int count,
107 GEM_BUG_ON(!IS_ALIGNED(*offset, sizeof(u32)));
109 cs = intel_ring_begin(rq, 4 * count);
113 for (i = 0; i < count; i++) {
114 *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT;
120 *offset += sizeof(u32);
123 intel_ring_advance(rq, cs);
128 static int read_mocs_table(struct i915_request *rq,
129 const struct drm_i915_mocs_table *table,
134 if (HAS_GLOBAL_MOCS_REGISTERS(rq->i915))
135 addr = global_mocs_offset();
137 addr = mocs_offset(rq->engine);
139 return read_regs(rq, addr, table->n_entries, offset);
142 static int read_l3cc_table(struct i915_request *rq,
143 const struct drm_i915_mocs_table *table,
146 u32 addr = i915_mmio_reg_offset(GEN9_LNCFCMOCS(0));
148 return read_regs(rq, addr, (table->n_entries + 1) / 2, offset);
151 static int check_mocs_table(struct intel_engine_cs *engine,
152 const struct drm_i915_mocs_table *table,
158 for_each_mocs(expect, table, i) {
159 if (**vaddr != expect) {
160 pr_err("%s: Invalid MOCS[%d] entry, found %08x, expected %08x\n",
161 engine->name, i, **vaddr, expect);
170 static bool mcr_range(struct drm_i915_private *i915, u32 offset)
173 * Registers in this range are affected by the MCR selector
174 * which only controls CPU initiated MMIO. Routing does not
175 * work for CS access so we cannot verify them on this path.
177 return INTEL_GEN(i915) >= 8 && offset >= 0xb000 && offset <= 0xb4ff;
180 static int check_l3cc_table(struct intel_engine_cs *engine,
181 const struct drm_i915_mocs_table *table,
184 /* Can we read the MCR range 0xb00 directly? See intel_workarounds! */
185 u32 reg = i915_mmio_reg_offset(GEN9_LNCFCMOCS(0));
189 for_each_l3cc(expect, table, i) {
190 if (!mcr_range(engine->i915, reg) && **vaddr != expect) {
191 pr_err("%s: Invalid L3CC[%d] entry, found %08x, expected %08x\n",
192 engine->name, i, **vaddr, expect);
202 static int check_mocs_engine(struct live_mocs *arg,
203 struct intel_context *ce)
205 struct i915_vma *vma = arg->scratch;
206 struct i915_request *rq;
211 memset32(arg->vaddr, STACK_MAGIC, PAGE_SIZE / sizeof(u32));
213 rq = intel_context_create_request(ce);
218 err = i915_request_await_object(rq, vma->obj, true);
220 err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
221 i915_vma_unlock(vma);
223 /* Read the mocs tables back using SRM */
224 offset = i915_ggtt_offset(vma);
226 err = read_mocs_table(rq, &arg->table, &offset);
227 if (!err && ce->engine->class == RENDER_CLASS)
228 err = read_l3cc_table(rq, &arg->table, &offset);
229 offset -= i915_ggtt_offset(vma);
230 GEM_BUG_ON(offset > PAGE_SIZE);
232 err = request_add_sync(rq, err);
236 /* Compare the results against the expected tables */
239 err = check_mocs_table(ce->engine, &arg->table, &vaddr);
240 if (!err && ce->engine->class == RENDER_CLASS)
241 err = check_l3cc_table(ce->engine, &arg->table, &vaddr);
245 GEM_BUG_ON(arg->vaddr + offset != vaddr);
249 static int live_mocs_kernel(void *arg)
251 struct intel_gt *gt = arg;
252 struct intel_engine_cs *engine;
253 enum intel_engine_id id;
254 struct live_mocs mocs;
257 /* Basic check the system is configured with the expected mocs table */
259 err = live_mocs_init(&mocs, gt);
263 for_each_engine(engine, gt, id) {
264 intel_engine_pm_get(engine);
265 err = check_mocs_engine(&mocs, engine->kernel_context);
266 intel_engine_pm_put(engine);
271 live_mocs_fini(&mocs);
275 static int live_mocs_clean(void *arg)
277 struct intel_gt *gt = arg;
278 struct intel_engine_cs *engine;
279 enum intel_engine_id id;
280 struct live_mocs mocs;
283 /* Every new context should see the same mocs table */
285 err = live_mocs_init(&mocs, gt);
289 for_each_engine(engine, gt, id) {
290 struct intel_context *ce;
292 ce = intel_context_create(engine->kernel_context->gem_context,
299 err = check_mocs_engine(&mocs, ce);
300 intel_context_put(ce);
305 live_mocs_fini(&mocs);
309 static int active_engine_reset(struct intel_context *ce,
312 struct igt_spinner spin;
313 struct i915_request *rq;
316 err = igt_spinner_init(&spin, ce->engine->gt);
320 rq = igt_spinner_create_request(&spin, ce, MI_NOOP);
322 igt_spinner_fini(&spin);
326 err = request_add_spin(rq, &spin);
328 err = intel_engine_reset(ce->engine, reason);
330 igt_spinner_end(&spin);
331 igt_spinner_fini(&spin);
336 static int __live_mocs_reset(struct live_mocs *mocs,
337 struct intel_context *ce)
341 err = intel_engine_reset(ce->engine, "mocs");
345 err = check_mocs_engine(mocs, ce);
349 err = active_engine_reset(ce, "mocs");
353 err = check_mocs_engine(mocs, ce);
357 intel_gt_reset(ce->engine->gt, ce->engine->mask, "mocs");
359 err = check_mocs_engine(mocs, ce);
366 static int live_mocs_reset(void *arg)
368 struct intel_gt *gt = arg;
369 struct intel_engine_cs *engine;
370 enum intel_engine_id id;
371 struct live_mocs mocs;
374 /* Check the mocs setup is retained over per-engine and global resets */
376 if (!intel_has_reset_engine(gt))
379 err = live_mocs_init(&mocs, gt);
383 igt_global_reset_lock(gt);
384 for_each_engine(engine, gt, id) {
385 struct intel_context *ce;
387 ce = intel_context_create(engine->kernel_context->gem_context,
394 intel_engine_pm_get(engine);
395 err = __live_mocs_reset(&mocs, ce);
396 intel_engine_pm_put(engine);
398 intel_context_put(ce);
402 igt_global_reset_unlock(gt);
404 live_mocs_fini(&mocs);
408 int intel_mocs_live_selftests(struct drm_i915_private *i915)
410 static const struct i915_subtest tests[] = {
411 SUBTEST(live_mocs_kernel),
412 SUBTEST(live_mocs_clean),
413 SUBTEST(live_mocs_reset),
415 struct drm_i915_mocs_table table;
417 if (!get_mocs_settings(i915, &table))
420 return intel_gt_live_subtests(tests, &i915->gt);