110be98a7SChris Wilson /*
210be98a7SChris Wilson * SPDX-License-Identifier: MIT
310be98a7SChris Wilson *
410be98a7SChris Wilson * Copyright © 2017 Intel Corporation
510be98a7SChris Wilson */
610be98a7SChris Wilson
710be98a7SChris Wilson #include <linux/prime_numbers.h>
810be98a7SChris Wilson
9de5825beSChris Wilson #include "gt/intel_engine_pm.h"
1045233ab2SChris Wilson #include "gt/intel_gpu_commands.h"
11cb823ed9SChris Wilson #include "gt/intel_gt.h"
127e805762SChris Wilson #include "gt/intel_gt_pm.h"
132871ea85SChris Wilson #include "gt/intel_ring.h"
14cb823ed9SChris Wilson
1510be98a7SChris Wilson #include "i915_selftest.h"
1610be98a7SChris Wilson #include "selftests/i915_random.h"
1710be98a7SChris Wilson
18c8c197d4SChris Wilson struct context {
19c8c197d4SChris Wilson struct drm_i915_gem_object *obj;
20c8c197d4SChris Wilson struct intel_engine_cs *engine;
21c8c197d4SChris Wilson };
22c8c197d4SChris Wilson
cpu_set(struct context * ctx,unsigned long offset,u32 v)23c8c197d4SChris Wilson static int cpu_set(struct context *ctx, unsigned long offset, u32 v)
2410be98a7SChris Wilson {
2510be98a7SChris Wilson unsigned int needs_clflush;
2610be98a7SChris Wilson struct page *page;
2710be98a7SChris Wilson void *map;
2810be98a7SChris Wilson u32 *cpu;
2910be98a7SChris Wilson int err;
3010be98a7SChris Wilson
311af343cdSMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
32c8c197d4SChris Wilson err = i915_gem_object_prepare_write(ctx->obj, &needs_clflush);
3310be98a7SChris Wilson if (err)
341af343cdSMaarten Lankhorst goto out;
3510be98a7SChris Wilson
36c8c197d4SChris Wilson page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
3710be98a7SChris Wilson map = kmap_atomic(page);
3810be98a7SChris Wilson cpu = map + offset_in_page(offset);
3910be98a7SChris Wilson
4010be98a7SChris Wilson if (needs_clflush & CLFLUSH_BEFORE)
4110be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu));
4210be98a7SChris Wilson
4310be98a7SChris Wilson *cpu = v;
4410be98a7SChris Wilson
4510be98a7SChris Wilson if (needs_clflush & CLFLUSH_AFTER)
4610be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu));
4710be98a7SChris Wilson
4810be98a7SChris Wilson kunmap_atomic(map);
49c8c197d4SChris Wilson i915_gem_object_finish_access(ctx->obj);
5010be98a7SChris Wilson
511af343cdSMaarten Lankhorst out:
521af343cdSMaarten Lankhorst i915_gem_object_unlock(ctx->obj);
531af343cdSMaarten Lankhorst return err;
5410be98a7SChris Wilson }
5510be98a7SChris Wilson
cpu_get(struct context * ctx,unsigned long offset,u32 * v)56c8c197d4SChris Wilson static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
5710be98a7SChris Wilson {
5810be98a7SChris Wilson unsigned int needs_clflush;
5910be98a7SChris Wilson struct page *page;
6010be98a7SChris Wilson void *map;
6110be98a7SChris Wilson u32 *cpu;
6210be98a7SChris Wilson int err;
6310be98a7SChris Wilson
641af343cdSMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
65c8c197d4SChris Wilson err = i915_gem_object_prepare_read(ctx->obj, &needs_clflush);
6610be98a7SChris Wilson if (err)
671af343cdSMaarten Lankhorst goto out;
6810be98a7SChris Wilson
69c8c197d4SChris Wilson page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
7010be98a7SChris Wilson map = kmap_atomic(page);
7110be98a7SChris Wilson cpu = map + offset_in_page(offset);
7210be98a7SChris Wilson
7310be98a7SChris Wilson if (needs_clflush & CLFLUSH_BEFORE)
7410be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu));
7510be98a7SChris Wilson
7610be98a7SChris Wilson *v = *cpu;
7710be98a7SChris Wilson
7810be98a7SChris Wilson kunmap_atomic(map);
79c8c197d4SChris Wilson i915_gem_object_finish_access(ctx->obj);
8010be98a7SChris Wilson
811af343cdSMaarten Lankhorst out:
821af343cdSMaarten Lankhorst i915_gem_object_unlock(ctx->obj);
831af343cdSMaarten Lankhorst return err;
8410be98a7SChris Wilson }
8510be98a7SChris Wilson
gtt_set(struct context * ctx,unsigned long offset,u32 v)86c8c197d4SChris Wilson static int gtt_set(struct context *ctx, unsigned long offset, u32 v)
8710be98a7SChris Wilson {
8810be98a7SChris Wilson struct i915_vma *vma;
8910be98a7SChris Wilson u32 __iomem *map;
907e805762SChris Wilson int err = 0;
9110be98a7SChris Wilson
9280f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
93c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
94c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
9510be98a7SChris Wilson if (err)
9610be98a7SChris Wilson return err;
9710be98a7SChris Wilson
98c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE);
9910be98a7SChris Wilson if (IS_ERR(vma))
10010be98a7SChris Wilson return PTR_ERR(vma);
10110be98a7SChris Wilson
1027e805762SChris Wilson intel_gt_pm_get(vma->vm->gt);
1037e805762SChris Wilson
10410be98a7SChris Wilson map = i915_vma_pin_iomap(vma);
10510be98a7SChris Wilson i915_vma_unpin(vma);
1067e805762SChris Wilson if (IS_ERR(map)) {
1077e805762SChris Wilson err = PTR_ERR(map);
1087e805762SChris Wilson goto out_rpm;
1097e805762SChris Wilson }
11010be98a7SChris Wilson
11110be98a7SChris Wilson iowrite32(v, &map[offset / sizeof(*map)]);
11210be98a7SChris Wilson i915_vma_unpin_iomap(vma);
11310be98a7SChris Wilson
1147e805762SChris Wilson out_rpm:
1157e805762SChris Wilson intel_gt_pm_put(vma->vm->gt);
1167e805762SChris Wilson return err;
11710be98a7SChris Wilson }
11810be98a7SChris Wilson
gtt_get(struct context * ctx,unsigned long offset,u32 * v)119c8c197d4SChris Wilson static int gtt_get(struct context *ctx, unsigned long offset, u32 *v)
12010be98a7SChris Wilson {
12110be98a7SChris Wilson struct i915_vma *vma;
12210be98a7SChris Wilson u32 __iomem *map;
1237e805762SChris Wilson int err = 0;
12410be98a7SChris Wilson
12580f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
126c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, false);
127c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
12810be98a7SChris Wilson if (err)
12910be98a7SChris Wilson return err;
13010be98a7SChris Wilson
131c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE);
13210be98a7SChris Wilson if (IS_ERR(vma))
13310be98a7SChris Wilson return PTR_ERR(vma);
13410be98a7SChris Wilson
1357e805762SChris Wilson intel_gt_pm_get(vma->vm->gt);
1367e805762SChris Wilson
13710be98a7SChris Wilson map = i915_vma_pin_iomap(vma);
13810be98a7SChris Wilson i915_vma_unpin(vma);
1397e805762SChris Wilson if (IS_ERR(map)) {
1407e805762SChris Wilson err = PTR_ERR(map);
1417e805762SChris Wilson goto out_rpm;
1427e805762SChris Wilson }
14310be98a7SChris Wilson
14410be98a7SChris Wilson *v = ioread32(&map[offset / sizeof(*map)]);
14510be98a7SChris Wilson i915_vma_unpin_iomap(vma);
14610be98a7SChris Wilson
1477e805762SChris Wilson out_rpm:
1487e805762SChris Wilson intel_gt_pm_put(vma->vm->gt);
1497e805762SChris Wilson return err;
15010be98a7SChris Wilson }
15110be98a7SChris Wilson
wc_set(struct context * ctx,unsigned long offset,u32 v)152c8c197d4SChris Wilson static int wc_set(struct context *ctx, unsigned long offset, u32 v)
15310be98a7SChris Wilson {
15410be98a7SChris Wilson u32 *map;
15510be98a7SChris Wilson int err;
15610be98a7SChris Wilson
15780f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
158c8c197d4SChris Wilson err = i915_gem_object_set_to_wc_domain(ctx->obj, true);
159c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
16010be98a7SChris Wilson if (err)
16110be98a7SChris Wilson return err;
16210be98a7SChris Wilson
1635521458dSMaarten Lankhorst map = i915_gem_object_pin_map_unlocked(ctx->obj, I915_MAP_WC);
16410be98a7SChris Wilson if (IS_ERR(map))
16510be98a7SChris Wilson return PTR_ERR(map);
16610be98a7SChris Wilson
16710be98a7SChris Wilson map[offset / sizeof(*map)] = v;
1689bad40a2SChris Wilson
1699bad40a2SChris Wilson __i915_gem_object_flush_map(ctx->obj, offset, sizeof(*map));
170c8c197d4SChris Wilson i915_gem_object_unpin_map(ctx->obj);
17110be98a7SChris Wilson
17210be98a7SChris Wilson return 0;
17310be98a7SChris Wilson }
17410be98a7SChris Wilson
wc_get(struct context * ctx,unsigned long offset,u32 * v)175c8c197d4SChris Wilson static int wc_get(struct context *ctx, unsigned long offset, u32 *v)
17610be98a7SChris Wilson {
17710be98a7SChris Wilson u32 *map;
17810be98a7SChris Wilson int err;
17910be98a7SChris Wilson
18080f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
181c8c197d4SChris Wilson err = i915_gem_object_set_to_wc_domain(ctx->obj, false);
182c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
18310be98a7SChris Wilson if (err)
18410be98a7SChris Wilson return err;
18510be98a7SChris Wilson
1865521458dSMaarten Lankhorst map = i915_gem_object_pin_map_unlocked(ctx->obj, I915_MAP_WC);
18710be98a7SChris Wilson if (IS_ERR(map))
18810be98a7SChris Wilson return PTR_ERR(map);
18910be98a7SChris Wilson
19010be98a7SChris Wilson *v = map[offset / sizeof(*map)];
191c8c197d4SChris Wilson i915_gem_object_unpin_map(ctx->obj);
19210be98a7SChris Wilson
19310be98a7SChris Wilson return 0;
19410be98a7SChris Wilson }
19510be98a7SChris Wilson
gpu_set(struct context * ctx,unsigned long offset,u32 v)196c8c197d4SChris Wilson static int gpu_set(struct context *ctx, unsigned long offset, u32 v)
19710be98a7SChris Wilson {
19810be98a7SChris Wilson struct i915_request *rq;
19910be98a7SChris Wilson struct i915_vma *vma;
20010be98a7SChris Wilson u32 *cs;
20110be98a7SChris Wilson int err;
20210be98a7SChris Wilson
2037d1c2618SMaarten Lankhorst vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, 0);
2047d1c2618SMaarten Lankhorst if (IS_ERR(vma))
2057d1c2618SMaarten Lankhorst return PTR_ERR(vma);
2067d1c2618SMaarten Lankhorst
20780f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
208c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
20910be98a7SChris Wilson if (err)
21015b6c924SMaarten Lankhorst goto out_unlock;
21110be98a7SChris Wilson
212de5825beSChris Wilson rq = intel_engine_create_kernel_request(ctx->engine);
21310be98a7SChris Wilson if (IS_ERR(rq)) {
21415b6c924SMaarten Lankhorst err = PTR_ERR(rq);
21515b6c924SMaarten Lankhorst goto out_unpin;
21610be98a7SChris Wilson }
21710be98a7SChris Wilson
21810be98a7SChris Wilson cs = intel_ring_begin(rq, 4);
21910be98a7SChris Wilson if (IS_ERR(cs)) {
22015b6c924SMaarten Lankhorst err = PTR_ERR(cs);
22115b6c924SMaarten Lankhorst goto out_rq;
22210be98a7SChris Wilson }
22310be98a7SChris Wilson
22440e1956eSLucas De Marchi if (GRAPHICS_VER(ctx->engine->i915) >= 8) {
225*08d34f12SNirmoy Das *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
22610be98a7SChris Wilson *cs++ = lower_32_bits(i915_ggtt_offset(vma) + offset);
22710be98a7SChris Wilson *cs++ = upper_32_bits(i915_ggtt_offset(vma) + offset);
22810be98a7SChris Wilson *cs++ = v;
22940e1956eSLucas De Marchi } else if (GRAPHICS_VER(ctx->engine->i915) >= 4) {
23010be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
23110be98a7SChris Wilson *cs++ = 0;
23210be98a7SChris Wilson *cs++ = i915_ggtt_offset(vma) + offset;
23310be98a7SChris Wilson *cs++ = v;
23410be98a7SChris Wilson } else {
23510be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
23610be98a7SChris Wilson *cs++ = i915_ggtt_offset(vma) + offset;
23710be98a7SChris Wilson *cs++ = v;
23810be98a7SChris Wilson *cs++ = MI_NOOP;
23910be98a7SChris Wilson }
24010be98a7SChris Wilson intel_ring_advance(rq, cs);
24110be98a7SChris Wilson
24210be98a7SChris Wilson err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
24310be98a7SChris Wilson
24415b6c924SMaarten Lankhorst out_rq:
24510be98a7SChris Wilson i915_request_add(rq);
24615b6c924SMaarten Lankhorst out_unpin:
24715b6c924SMaarten Lankhorst i915_vma_unpin(vma);
24815b6c924SMaarten Lankhorst out_unlock:
24915b6c924SMaarten Lankhorst i915_gem_object_unlock(ctx->obj);
25010be98a7SChris Wilson
25110be98a7SChris Wilson return err;
25210be98a7SChris Wilson }
25310be98a7SChris Wilson
always_valid(struct context * ctx)254c8c197d4SChris Wilson static bool always_valid(struct context *ctx)
25510be98a7SChris Wilson {
25610be98a7SChris Wilson return true;
25710be98a7SChris Wilson }
25810be98a7SChris Wilson
needs_fence_registers(struct context * ctx)259c8c197d4SChris Wilson static bool needs_fence_registers(struct context *ctx)
26010be98a7SChris Wilson {
261e60f7bb7SMatthew Auld struct intel_gt *gt = ctx->engine->gt;
262e60f7bb7SMatthew Auld
263e60f7bb7SMatthew Auld if (intel_gt_is_wedged(gt))
264e60f7bb7SMatthew Auld return false;
265e60f7bb7SMatthew Auld
266e60f7bb7SMatthew Auld return gt->ggtt->num_fences;
26710be98a7SChris Wilson }
26810be98a7SChris Wilson
needs_mi_store_dword(struct context * ctx)269c8c197d4SChris Wilson static bool needs_mi_store_dword(struct context *ctx)
27010be98a7SChris Wilson {
271c8c197d4SChris Wilson if (intel_gt_is_wedged(ctx->engine->gt))
27210be98a7SChris Wilson return false;
27310be98a7SChris Wilson
274c8c197d4SChris Wilson return intel_engine_can_store_dword(ctx->engine);
27510be98a7SChris Wilson }
27610be98a7SChris Wilson
27710be98a7SChris Wilson static const struct igt_coherency_mode {
27810be98a7SChris Wilson const char *name;
279c8c197d4SChris Wilson int (*set)(struct context *ctx, unsigned long offset, u32 v);
280c8c197d4SChris Wilson int (*get)(struct context *ctx, unsigned long offset, u32 *v);
281c8c197d4SChris Wilson bool (*valid)(struct context *ctx);
28210be98a7SChris Wilson } igt_coherency_mode[] = {
28310be98a7SChris Wilson { "cpu", cpu_set, cpu_get, always_valid },
28410be98a7SChris Wilson { "gtt", gtt_set, gtt_get, needs_fence_registers },
28510be98a7SChris Wilson { "wc", wc_set, wc_get, always_valid },
28610be98a7SChris Wilson { "gpu", gpu_set, NULL, needs_mi_store_dword },
28710be98a7SChris Wilson { },
28810be98a7SChris Wilson };
28910be98a7SChris Wilson
290c8c197d4SChris Wilson static struct intel_engine_cs *
random_engine(struct drm_i915_private * i915,struct rnd_state * prng)291c8c197d4SChris Wilson random_engine(struct drm_i915_private *i915, struct rnd_state *prng)
292c8c197d4SChris Wilson {
293c8c197d4SChris Wilson struct intel_engine_cs *engine;
294c8c197d4SChris Wilson unsigned int count;
295c8c197d4SChris Wilson
296c8c197d4SChris Wilson count = 0;
297c8c197d4SChris Wilson for_each_uabi_engine(engine, i915)
298c8c197d4SChris Wilson count++;
299c8c197d4SChris Wilson
300c8c197d4SChris Wilson count = i915_prandom_u32_max_state(count, prng);
301c8c197d4SChris Wilson for_each_uabi_engine(engine, i915)
302c8c197d4SChris Wilson if (count-- == 0)
303c8c197d4SChris Wilson return engine;
304c8c197d4SChris Wilson
305c8c197d4SChris Wilson return NULL;
306c8c197d4SChris Wilson }
307c8c197d4SChris Wilson
igt_gem_coherency(void * arg)30810be98a7SChris Wilson static int igt_gem_coherency(void *arg)
30910be98a7SChris Wilson {
31010be98a7SChris Wilson const unsigned int ncachelines = PAGE_SIZE/64;
31110be98a7SChris Wilson struct drm_i915_private *i915 = arg;
31210be98a7SChris Wilson const struct igt_coherency_mode *read, *write, *over;
31310be98a7SChris Wilson unsigned long count, n;
31410be98a7SChris Wilson u32 *offsets, *values;
315c8c197d4SChris Wilson I915_RND_STATE(prng);
316c8c197d4SChris Wilson struct context ctx;
31710be98a7SChris Wilson int err = 0;
31810be98a7SChris Wilson
319c8c197d4SChris Wilson /*
320c8c197d4SChris Wilson * We repeatedly write, overwrite and read from a sequence of
32110be98a7SChris Wilson * cachelines in order to try and detect incoherency (unflushed writes
32210be98a7SChris Wilson * from either the CPU or GPU). Each setter/getter uses our cache
32310be98a7SChris Wilson * domain API which should prevent incoherency.
32410be98a7SChris Wilson */
32510be98a7SChris Wilson
32610be98a7SChris Wilson offsets = kmalloc_array(ncachelines, 2*sizeof(u32), GFP_KERNEL);
32710be98a7SChris Wilson if (!offsets)
32810be98a7SChris Wilson return -ENOMEM;
32910be98a7SChris Wilson for (count = 0; count < ncachelines; count++)
33010be98a7SChris Wilson offsets[count] = count * 64 + 4 * (count % 16);
33110be98a7SChris Wilson
33210be98a7SChris Wilson values = offsets + ncachelines;
33310be98a7SChris Wilson
334c8c197d4SChris Wilson ctx.engine = random_engine(i915, &prng);
3356ea578a5SChris Wilson if (!ctx.engine) {
3366ea578a5SChris Wilson err = -ENODEV;
3376ea578a5SChris Wilson goto out_free;
3386ea578a5SChris Wilson }
339c8c197d4SChris Wilson pr_info("%s: using %s\n", __func__, ctx.engine->name);
340f9a863c2SChris Wilson intel_engine_pm_get(ctx.engine);
341c8c197d4SChris Wilson
34210be98a7SChris Wilson for (over = igt_coherency_mode; over->name; over++) {
34310be98a7SChris Wilson if (!over->set)
34410be98a7SChris Wilson continue;
34510be98a7SChris Wilson
346c8c197d4SChris Wilson if (!over->valid(&ctx))
34710be98a7SChris Wilson continue;
34810be98a7SChris Wilson
34910be98a7SChris Wilson for (write = igt_coherency_mode; write->name; write++) {
35010be98a7SChris Wilson if (!write->set)
35110be98a7SChris Wilson continue;
35210be98a7SChris Wilson
353c8c197d4SChris Wilson if (!write->valid(&ctx))
35410be98a7SChris Wilson continue;
35510be98a7SChris Wilson
35610be98a7SChris Wilson for (read = igt_coherency_mode; read->name; read++) {
35710be98a7SChris Wilson if (!read->get)
35810be98a7SChris Wilson continue;
35910be98a7SChris Wilson
360c8c197d4SChris Wilson if (!read->valid(&ctx))
36110be98a7SChris Wilson continue;
36210be98a7SChris Wilson
36310be98a7SChris Wilson for_each_prime_number_from(count, 1, ncachelines) {
364c8c197d4SChris Wilson ctx.obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
365c8c197d4SChris Wilson if (IS_ERR(ctx.obj)) {
366c8c197d4SChris Wilson err = PTR_ERR(ctx.obj);
3676ea578a5SChris Wilson goto out_pm;
36810be98a7SChris Wilson }
36910be98a7SChris Wilson
37010be98a7SChris Wilson i915_random_reorder(offsets, ncachelines, &prng);
37110be98a7SChris Wilson for (n = 0; n < count; n++)
37210be98a7SChris Wilson values[n] = prandom_u32_state(&prng);
37310be98a7SChris Wilson
37410be98a7SChris Wilson for (n = 0; n < count; n++) {
375c8c197d4SChris Wilson err = over->set(&ctx, offsets[n], ~values[n]);
37610be98a7SChris Wilson if (err) {
37710be98a7SChris Wilson pr_err("Failed to set stale value[%ld/%ld] in object using %s, err=%d\n",
37810be98a7SChris Wilson n, count, over->name, err);
37910be98a7SChris Wilson goto put_object;
38010be98a7SChris Wilson }
38110be98a7SChris Wilson }
38210be98a7SChris Wilson
38310be98a7SChris Wilson for (n = 0; n < count; n++) {
384c8c197d4SChris Wilson err = write->set(&ctx, offsets[n], values[n]);
38510be98a7SChris Wilson if (err) {
38610be98a7SChris Wilson pr_err("Failed to set value[%ld/%ld] in object using %s, err=%d\n",
38710be98a7SChris Wilson n, count, write->name, err);
38810be98a7SChris Wilson goto put_object;
38910be98a7SChris Wilson }
39010be98a7SChris Wilson }
39110be98a7SChris Wilson
39210be98a7SChris Wilson for (n = 0; n < count; n++) {
39310be98a7SChris Wilson u32 found;
39410be98a7SChris Wilson
395c8c197d4SChris Wilson err = read->get(&ctx, offsets[n], &found);
39610be98a7SChris Wilson if (err) {
39710be98a7SChris Wilson pr_err("Failed to get value[%ld/%ld] in object using %s, err=%d\n",
39810be98a7SChris Wilson n, count, read->name, err);
39910be98a7SChris Wilson goto put_object;
40010be98a7SChris Wilson }
40110be98a7SChris Wilson
40210be98a7SChris Wilson if (found != values[n]) {
40310be98a7SChris Wilson pr_err("Value[%ld/%ld] mismatch, (overwrite with %s) wrote [%s] %x read [%s] %x (inverse %x), at offset %x\n",
40410be98a7SChris Wilson n, count, over->name,
40510be98a7SChris Wilson write->name, values[n],
40610be98a7SChris Wilson read->name, found,
40710be98a7SChris Wilson ~values[n], offsets[n]);
40810be98a7SChris Wilson err = -EINVAL;
40910be98a7SChris Wilson goto put_object;
41010be98a7SChris Wilson }
41110be98a7SChris Wilson }
41210be98a7SChris Wilson
413c8c197d4SChris Wilson i915_gem_object_put(ctx.obj);
41410be98a7SChris Wilson }
41510be98a7SChris Wilson }
41610be98a7SChris Wilson }
41710be98a7SChris Wilson }
4186ea578a5SChris Wilson out_pm:
419f9a863c2SChris Wilson intel_engine_pm_put(ctx.engine);
4206ea578a5SChris Wilson out_free:
42110be98a7SChris Wilson kfree(offsets);
42210be98a7SChris Wilson return err;
42310be98a7SChris Wilson
42410be98a7SChris Wilson put_object:
425c8c197d4SChris Wilson i915_gem_object_put(ctx.obj);
4266ea578a5SChris Wilson goto out_pm;
42710be98a7SChris Wilson }
42810be98a7SChris Wilson
i915_gem_coherency_live_selftests(struct drm_i915_private * i915)42910be98a7SChris Wilson int i915_gem_coherency_live_selftests(struct drm_i915_private *i915)
43010be98a7SChris Wilson {
43110be98a7SChris Wilson static const struct i915_subtest tests[] = {
43210be98a7SChris Wilson SUBTEST(igt_gem_coherency),
43310be98a7SChris Wilson };
43410be98a7SChris Wilson
43561faec5fSMatthew Brost return i915_live_subtests(tests, i915);
43610be98a7SChris Wilson }
437