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 u32 *cpu;
2810be98a7SChris Wilson int err;
2910be98a7SChris Wilson
301af343cdSMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
31c8c197d4SChris Wilson err = i915_gem_object_prepare_write(ctx->obj, &needs_clflush);
3210be98a7SChris Wilson if (err)
331af343cdSMaarten Lankhorst goto out;
3410be98a7SChris Wilson
35c8c197d4SChris Wilson page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
36*40b39900SZhao Liu cpu = kmap_local_page(page) + offset_in_page(offset);
3710be98a7SChris Wilson
3810be98a7SChris Wilson if (needs_clflush & CLFLUSH_BEFORE)
3910be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu));
4010be98a7SChris Wilson
4110be98a7SChris Wilson *cpu = v;
4210be98a7SChris Wilson
4310be98a7SChris Wilson if (needs_clflush & CLFLUSH_AFTER)
4410be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu));
4510be98a7SChris Wilson
46*40b39900SZhao Liu kunmap_local(cpu);
47c8c197d4SChris Wilson i915_gem_object_finish_access(ctx->obj);
4810be98a7SChris Wilson
491af343cdSMaarten Lankhorst out:
501af343cdSMaarten Lankhorst i915_gem_object_unlock(ctx->obj);
511af343cdSMaarten Lankhorst return err;
5210be98a7SChris Wilson }
5310be98a7SChris Wilson
cpu_get(struct context * ctx,unsigned long offset,u32 * v)54c8c197d4SChris Wilson static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
5510be98a7SChris Wilson {
5610be98a7SChris Wilson unsigned int needs_clflush;
5710be98a7SChris Wilson struct page *page;
5810be98a7SChris Wilson u32 *cpu;
5910be98a7SChris Wilson int err;
6010be98a7SChris Wilson
611af343cdSMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
62c8c197d4SChris Wilson err = i915_gem_object_prepare_read(ctx->obj, &needs_clflush);
6310be98a7SChris Wilson if (err)
641af343cdSMaarten Lankhorst goto out;
6510be98a7SChris Wilson
66c8c197d4SChris Wilson page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
67*40b39900SZhao Liu cpu = kmap_local_page(page) + offset_in_page(offset);
6810be98a7SChris Wilson
6910be98a7SChris Wilson if (needs_clflush & CLFLUSH_BEFORE)
7010be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu));
7110be98a7SChris Wilson
7210be98a7SChris Wilson *v = *cpu;
7310be98a7SChris Wilson
74*40b39900SZhao Liu kunmap_local(cpu);
75c8c197d4SChris Wilson i915_gem_object_finish_access(ctx->obj);
7610be98a7SChris Wilson
771af343cdSMaarten Lankhorst out:
781af343cdSMaarten Lankhorst i915_gem_object_unlock(ctx->obj);
791af343cdSMaarten Lankhorst return err;
8010be98a7SChris Wilson }
8110be98a7SChris Wilson
gtt_set(struct context * ctx,unsigned long offset,u32 v)82c8c197d4SChris Wilson static int gtt_set(struct context *ctx, unsigned long offset, u32 v)
8310be98a7SChris Wilson {
845e4e06e4SAndrzej Hajda intel_wakeref_t wakeref;
8510be98a7SChris Wilson struct i915_vma *vma;
8610be98a7SChris Wilson u32 __iomem *map;
877e805762SChris Wilson int err = 0;
8810be98a7SChris Wilson
8980f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
90c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
91c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
9210be98a7SChris Wilson if (err)
9310be98a7SChris Wilson return err;
9410be98a7SChris Wilson
95c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE);
9610be98a7SChris Wilson if (IS_ERR(vma))
9710be98a7SChris Wilson return PTR_ERR(vma);
9810be98a7SChris Wilson
995e4e06e4SAndrzej Hajda wakeref = intel_gt_pm_get(vma->vm->gt);
1007e805762SChris Wilson
10110be98a7SChris Wilson map = i915_vma_pin_iomap(vma);
10210be98a7SChris Wilson i915_vma_unpin(vma);
1037e805762SChris Wilson if (IS_ERR(map)) {
1047e805762SChris Wilson err = PTR_ERR(map);
1057e805762SChris Wilson goto out_rpm;
1067e805762SChris Wilson }
10710be98a7SChris Wilson
10810be98a7SChris Wilson iowrite32(v, &map[offset / sizeof(*map)]);
10910be98a7SChris Wilson i915_vma_unpin_iomap(vma);
11010be98a7SChris Wilson
1117e805762SChris Wilson out_rpm:
1125e4e06e4SAndrzej Hajda intel_gt_pm_put(vma->vm->gt, wakeref);
1137e805762SChris Wilson return err;
11410be98a7SChris Wilson }
11510be98a7SChris Wilson
gtt_get(struct context * ctx,unsigned long offset,u32 * v)116c8c197d4SChris Wilson static int gtt_get(struct context *ctx, unsigned long offset, u32 *v)
11710be98a7SChris Wilson {
1185e4e06e4SAndrzej Hajda intel_wakeref_t wakeref;
11910be98a7SChris Wilson struct i915_vma *vma;
12010be98a7SChris Wilson u32 __iomem *map;
1217e805762SChris Wilson int err = 0;
12210be98a7SChris Wilson
12380f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
124c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, false);
125c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
12610be98a7SChris Wilson if (err)
12710be98a7SChris Wilson return err;
12810be98a7SChris Wilson
129c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE);
13010be98a7SChris Wilson if (IS_ERR(vma))
13110be98a7SChris Wilson return PTR_ERR(vma);
13210be98a7SChris Wilson
1335e4e06e4SAndrzej Hajda wakeref = intel_gt_pm_get(vma->vm->gt);
1347e805762SChris Wilson
13510be98a7SChris Wilson map = i915_vma_pin_iomap(vma);
13610be98a7SChris Wilson i915_vma_unpin(vma);
1377e805762SChris Wilson if (IS_ERR(map)) {
1387e805762SChris Wilson err = PTR_ERR(map);
1397e805762SChris Wilson goto out_rpm;
1407e805762SChris Wilson }
14110be98a7SChris Wilson
14210be98a7SChris Wilson *v = ioread32(&map[offset / sizeof(*map)]);
14310be98a7SChris Wilson i915_vma_unpin_iomap(vma);
14410be98a7SChris Wilson
1457e805762SChris Wilson out_rpm:
1465e4e06e4SAndrzej Hajda intel_gt_pm_put(vma->vm->gt, wakeref);
1477e805762SChris Wilson return err;
14810be98a7SChris Wilson }
14910be98a7SChris Wilson
wc_set(struct context * ctx,unsigned long offset,u32 v)150c8c197d4SChris Wilson static int wc_set(struct context *ctx, unsigned long offset, u32 v)
15110be98a7SChris Wilson {
15210be98a7SChris Wilson u32 *map;
15310be98a7SChris Wilson int err;
15410be98a7SChris Wilson
15580f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
156c8c197d4SChris Wilson err = i915_gem_object_set_to_wc_domain(ctx->obj, true);
157c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
15810be98a7SChris Wilson if (err)
15910be98a7SChris Wilson return err;
16010be98a7SChris Wilson
1615521458dSMaarten Lankhorst map = i915_gem_object_pin_map_unlocked(ctx->obj, I915_MAP_WC);
16210be98a7SChris Wilson if (IS_ERR(map))
16310be98a7SChris Wilson return PTR_ERR(map);
16410be98a7SChris Wilson
16510be98a7SChris Wilson map[offset / sizeof(*map)] = v;
1669bad40a2SChris Wilson
1679bad40a2SChris Wilson __i915_gem_object_flush_map(ctx->obj, offset, sizeof(*map));
168c8c197d4SChris Wilson i915_gem_object_unpin_map(ctx->obj);
16910be98a7SChris Wilson
17010be98a7SChris Wilson return 0;
17110be98a7SChris Wilson }
17210be98a7SChris Wilson
wc_get(struct context * ctx,unsigned long offset,u32 * v)173c8c197d4SChris Wilson static int wc_get(struct context *ctx, unsigned long offset, u32 *v)
17410be98a7SChris Wilson {
17510be98a7SChris Wilson u32 *map;
17610be98a7SChris Wilson int err;
17710be98a7SChris Wilson
17880f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
179c8c197d4SChris Wilson err = i915_gem_object_set_to_wc_domain(ctx->obj, false);
180c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj);
18110be98a7SChris Wilson if (err)
18210be98a7SChris Wilson return err;
18310be98a7SChris Wilson
1845521458dSMaarten Lankhorst map = i915_gem_object_pin_map_unlocked(ctx->obj, I915_MAP_WC);
18510be98a7SChris Wilson if (IS_ERR(map))
18610be98a7SChris Wilson return PTR_ERR(map);
18710be98a7SChris Wilson
18810be98a7SChris Wilson *v = map[offset / sizeof(*map)];
189c8c197d4SChris Wilson i915_gem_object_unpin_map(ctx->obj);
19010be98a7SChris Wilson
19110be98a7SChris Wilson return 0;
19210be98a7SChris Wilson }
19310be98a7SChris Wilson
gpu_set(struct context * ctx,unsigned long offset,u32 v)194c8c197d4SChris Wilson static int gpu_set(struct context *ctx, unsigned long offset, u32 v)
19510be98a7SChris Wilson {
19610be98a7SChris Wilson struct i915_request *rq;
19710be98a7SChris Wilson struct i915_vma *vma;
19810be98a7SChris Wilson u32 *cs;
19910be98a7SChris Wilson int err;
20010be98a7SChris Wilson
2017d1c2618SMaarten Lankhorst vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, 0);
2027d1c2618SMaarten Lankhorst if (IS_ERR(vma))
2037d1c2618SMaarten Lankhorst return PTR_ERR(vma);
2047d1c2618SMaarten Lankhorst
20580f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL);
206c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
20710be98a7SChris Wilson if (err)
20815b6c924SMaarten Lankhorst goto out_unlock;
20910be98a7SChris Wilson
210de5825beSChris Wilson rq = intel_engine_create_kernel_request(ctx->engine);
21110be98a7SChris Wilson if (IS_ERR(rq)) {
21215b6c924SMaarten Lankhorst err = PTR_ERR(rq);
21315b6c924SMaarten Lankhorst goto out_unpin;
21410be98a7SChris Wilson }
21510be98a7SChris Wilson
21610be98a7SChris Wilson cs = intel_ring_begin(rq, 4);
21710be98a7SChris Wilson if (IS_ERR(cs)) {
21815b6c924SMaarten Lankhorst err = PTR_ERR(cs);
21915b6c924SMaarten Lankhorst goto out_rq;
22010be98a7SChris Wilson }
22110be98a7SChris Wilson
22240e1956eSLucas De Marchi if (GRAPHICS_VER(ctx->engine->i915) >= 8) {
22308d34f12SNirmoy Das *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
22410be98a7SChris Wilson *cs++ = lower_32_bits(i915_ggtt_offset(vma) + offset);
22510be98a7SChris Wilson *cs++ = upper_32_bits(i915_ggtt_offset(vma) + offset);
22610be98a7SChris Wilson *cs++ = v;
22740e1956eSLucas De Marchi } else if (GRAPHICS_VER(ctx->engine->i915) >= 4) {
22810be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
22910be98a7SChris Wilson *cs++ = 0;
23010be98a7SChris Wilson *cs++ = i915_ggtt_offset(vma) + offset;
23110be98a7SChris Wilson *cs++ = v;
23210be98a7SChris Wilson } else {
23310be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
23410be98a7SChris Wilson *cs++ = i915_ggtt_offset(vma) + offset;
23510be98a7SChris Wilson *cs++ = v;
23610be98a7SChris Wilson *cs++ = MI_NOOP;
23710be98a7SChris Wilson }
23810be98a7SChris Wilson intel_ring_advance(rq, cs);
23910be98a7SChris Wilson
24010be98a7SChris Wilson err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
24110be98a7SChris Wilson
24215b6c924SMaarten Lankhorst out_rq:
24310be98a7SChris Wilson i915_request_add(rq);
24415b6c924SMaarten Lankhorst out_unpin:
24515b6c924SMaarten Lankhorst i915_vma_unpin(vma);
24615b6c924SMaarten Lankhorst out_unlock:
24715b6c924SMaarten Lankhorst i915_gem_object_unlock(ctx->obj);
24810be98a7SChris Wilson
24910be98a7SChris Wilson return err;
25010be98a7SChris Wilson }
25110be98a7SChris Wilson
always_valid(struct context * ctx)252c8c197d4SChris Wilson static bool always_valid(struct context *ctx)
25310be98a7SChris Wilson {
25410be98a7SChris Wilson return true;
25510be98a7SChris Wilson }
25610be98a7SChris Wilson
needs_fence_registers(struct context * ctx)257c8c197d4SChris Wilson static bool needs_fence_registers(struct context *ctx)
25810be98a7SChris Wilson {
259e60f7bb7SMatthew Auld struct intel_gt *gt = ctx->engine->gt;
260e60f7bb7SMatthew Auld
261e60f7bb7SMatthew Auld if (intel_gt_is_wedged(gt))
262e60f7bb7SMatthew Auld return false;
263e60f7bb7SMatthew Auld
264e60f7bb7SMatthew Auld return gt->ggtt->num_fences;
26510be98a7SChris Wilson }
26610be98a7SChris Wilson
needs_mi_store_dword(struct context * ctx)267c8c197d4SChris Wilson static bool needs_mi_store_dword(struct context *ctx)
26810be98a7SChris Wilson {
269c8c197d4SChris Wilson if (intel_gt_is_wedged(ctx->engine->gt))
27010be98a7SChris Wilson return false;
27110be98a7SChris Wilson
272c8c197d4SChris Wilson return intel_engine_can_store_dword(ctx->engine);
27310be98a7SChris Wilson }
27410be98a7SChris Wilson
27510be98a7SChris Wilson static const struct igt_coherency_mode {
27610be98a7SChris Wilson const char *name;
277c8c197d4SChris Wilson int (*set)(struct context *ctx, unsigned long offset, u32 v);
278c8c197d4SChris Wilson int (*get)(struct context *ctx, unsigned long offset, u32 *v);
279c8c197d4SChris Wilson bool (*valid)(struct context *ctx);
28010be98a7SChris Wilson } igt_coherency_mode[] = {
28110be98a7SChris Wilson { "cpu", cpu_set, cpu_get, always_valid },
28210be98a7SChris Wilson { "gtt", gtt_set, gtt_get, needs_fence_registers },
28310be98a7SChris Wilson { "wc", wc_set, wc_get, always_valid },
28410be98a7SChris Wilson { "gpu", gpu_set, NULL, needs_mi_store_dword },
28510be98a7SChris Wilson { },
28610be98a7SChris Wilson };
28710be98a7SChris Wilson
288c8c197d4SChris Wilson static struct intel_engine_cs *
random_engine(struct drm_i915_private * i915,struct rnd_state * prng)289c8c197d4SChris Wilson random_engine(struct drm_i915_private *i915, struct rnd_state *prng)
290c8c197d4SChris Wilson {
291c8c197d4SChris Wilson struct intel_engine_cs *engine;
292c8c197d4SChris Wilson unsigned int count;
293c8c197d4SChris Wilson
294c8c197d4SChris Wilson count = 0;
295c8c197d4SChris Wilson for_each_uabi_engine(engine, i915)
296c8c197d4SChris Wilson count++;
297c8c197d4SChris Wilson
298c8c197d4SChris Wilson count = i915_prandom_u32_max_state(count, prng);
299c8c197d4SChris Wilson for_each_uabi_engine(engine, i915)
300c8c197d4SChris Wilson if (count-- == 0)
301c8c197d4SChris Wilson return engine;
302c8c197d4SChris Wilson
303c8c197d4SChris Wilson return NULL;
304c8c197d4SChris Wilson }
305c8c197d4SChris Wilson
igt_gem_coherency(void * arg)30610be98a7SChris Wilson static int igt_gem_coherency(void *arg)
30710be98a7SChris Wilson {
30810be98a7SChris Wilson const unsigned int ncachelines = PAGE_SIZE/64;
30910be98a7SChris Wilson struct drm_i915_private *i915 = arg;
31010be98a7SChris Wilson const struct igt_coherency_mode *read, *write, *over;
31110be98a7SChris Wilson unsigned long count, n;
31210be98a7SChris Wilson u32 *offsets, *values;
313c8c197d4SChris Wilson I915_RND_STATE(prng);
314c8c197d4SChris Wilson struct context ctx;
31510be98a7SChris Wilson int err = 0;
31610be98a7SChris Wilson
317c8c197d4SChris Wilson /*
318c8c197d4SChris Wilson * We repeatedly write, overwrite and read from a sequence of
31910be98a7SChris Wilson * cachelines in order to try and detect incoherency (unflushed writes
32010be98a7SChris Wilson * from either the CPU or GPU). Each setter/getter uses our cache
32110be98a7SChris Wilson * domain API which should prevent incoherency.
32210be98a7SChris Wilson */
32310be98a7SChris Wilson
32410be98a7SChris Wilson offsets = kmalloc_array(ncachelines, 2*sizeof(u32), GFP_KERNEL);
32510be98a7SChris Wilson if (!offsets)
32610be98a7SChris Wilson return -ENOMEM;
32710be98a7SChris Wilson for (count = 0; count < ncachelines; count++)
32810be98a7SChris Wilson offsets[count] = count * 64 + 4 * (count % 16);
32910be98a7SChris Wilson
33010be98a7SChris Wilson values = offsets + ncachelines;
33110be98a7SChris Wilson
332c8c197d4SChris Wilson ctx.engine = random_engine(i915, &prng);
3336ea578a5SChris Wilson if (!ctx.engine) {
3346ea578a5SChris Wilson err = -ENODEV;
3356ea578a5SChris Wilson goto out_free;
3366ea578a5SChris Wilson }
337c8c197d4SChris Wilson pr_info("%s: using %s\n", __func__, ctx.engine->name);
338f9a863c2SChris Wilson intel_engine_pm_get(ctx.engine);
339c8c197d4SChris Wilson
34010be98a7SChris Wilson for (over = igt_coherency_mode; over->name; over++) {
34110be98a7SChris Wilson if (!over->set)
34210be98a7SChris Wilson continue;
34310be98a7SChris Wilson
344c8c197d4SChris Wilson if (!over->valid(&ctx))
34510be98a7SChris Wilson continue;
34610be98a7SChris Wilson
34710be98a7SChris Wilson for (write = igt_coherency_mode; write->name; write++) {
34810be98a7SChris Wilson if (!write->set)
34910be98a7SChris Wilson continue;
35010be98a7SChris Wilson
351c8c197d4SChris Wilson if (!write->valid(&ctx))
35210be98a7SChris Wilson continue;
35310be98a7SChris Wilson
35410be98a7SChris Wilson for (read = igt_coherency_mode; read->name; read++) {
35510be98a7SChris Wilson if (!read->get)
35610be98a7SChris Wilson continue;
35710be98a7SChris Wilson
358c8c197d4SChris Wilson if (!read->valid(&ctx))
35910be98a7SChris Wilson continue;
36010be98a7SChris Wilson
36110be98a7SChris Wilson for_each_prime_number_from(count, 1, ncachelines) {
362c8c197d4SChris Wilson ctx.obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
363c8c197d4SChris Wilson if (IS_ERR(ctx.obj)) {
364c8c197d4SChris Wilson err = PTR_ERR(ctx.obj);
3656ea578a5SChris Wilson goto out_pm;
36610be98a7SChris Wilson }
36710be98a7SChris Wilson
36810be98a7SChris Wilson i915_random_reorder(offsets, ncachelines, &prng);
36910be98a7SChris Wilson for (n = 0; n < count; n++)
37010be98a7SChris Wilson values[n] = prandom_u32_state(&prng);
37110be98a7SChris Wilson
37210be98a7SChris Wilson for (n = 0; n < count; n++) {
373c8c197d4SChris Wilson err = over->set(&ctx, offsets[n], ~values[n]);
37410be98a7SChris Wilson if (err) {
37510be98a7SChris Wilson pr_err("Failed to set stale value[%ld/%ld] in object using %s, err=%d\n",
37610be98a7SChris Wilson n, count, over->name, err);
37710be98a7SChris Wilson goto put_object;
37810be98a7SChris Wilson }
37910be98a7SChris Wilson }
38010be98a7SChris Wilson
38110be98a7SChris Wilson for (n = 0; n < count; n++) {
382c8c197d4SChris Wilson err = write->set(&ctx, offsets[n], values[n]);
38310be98a7SChris Wilson if (err) {
38410be98a7SChris Wilson pr_err("Failed to set value[%ld/%ld] in object using %s, err=%d\n",
38510be98a7SChris Wilson n, count, write->name, err);
38610be98a7SChris Wilson goto put_object;
38710be98a7SChris Wilson }
38810be98a7SChris Wilson }
38910be98a7SChris Wilson
39010be98a7SChris Wilson for (n = 0; n < count; n++) {
39110be98a7SChris Wilson u32 found;
39210be98a7SChris Wilson
393c8c197d4SChris Wilson err = read->get(&ctx, offsets[n], &found);
39410be98a7SChris Wilson if (err) {
39510be98a7SChris Wilson pr_err("Failed to get value[%ld/%ld] in object using %s, err=%d\n",
39610be98a7SChris Wilson n, count, read->name, err);
39710be98a7SChris Wilson goto put_object;
39810be98a7SChris Wilson }
39910be98a7SChris Wilson
40010be98a7SChris Wilson if (found != values[n]) {
40110be98a7SChris Wilson pr_err("Value[%ld/%ld] mismatch, (overwrite with %s) wrote [%s] %x read [%s] %x (inverse %x), at offset %x\n",
40210be98a7SChris Wilson n, count, over->name,
40310be98a7SChris Wilson write->name, values[n],
40410be98a7SChris Wilson read->name, found,
40510be98a7SChris Wilson ~values[n], offsets[n]);
40610be98a7SChris Wilson err = -EINVAL;
40710be98a7SChris Wilson goto put_object;
40810be98a7SChris Wilson }
40910be98a7SChris Wilson }
41010be98a7SChris Wilson
411c8c197d4SChris Wilson i915_gem_object_put(ctx.obj);
41210be98a7SChris Wilson }
41310be98a7SChris Wilson }
41410be98a7SChris Wilson }
41510be98a7SChris Wilson }
4166ea578a5SChris Wilson out_pm:
417f9a863c2SChris Wilson intel_engine_pm_put(ctx.engine);
4186ea578a5SChris Wilson out_free:
41910be98a7SChris Wilson kfree(offsets);
42010be98a7SChris Wilson return err;
42110be98a7SChris Wilson
42210be98a7SChris Wilson put_object:
423c8c197d4SChris Wilson i915_gem_object_put(ctx.obj);
4246ea578a5SChris Wilson goto out_pm;
42510be98a7SChris Wilson }
42610be98a7SChris Wilson
i915_gem_coherency_live_selftests(struct drm_i915_private * i915)42710be98a7SChris Wilson int i915_gem_coherency_live_selftests(struct drm_i915_private *i915)
42810be98a7SChris Wilson {
42910be98a7SChris Wilson static const struct i915_subtest tests[] = {
43010be98a7SChris Wilson SUBTEST(igt_gem_coherency),
43110be98a7SChris Wilson };
43210be98a7SChris Wilson
43361faec5fSMatthew Brost return i915_live_subtests(tests, i915);
43410be98a7SChris Wilson }
435