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" 10cb823ed9SChris Wilson #include "gt/intel_gt.h" 117e805762SChris Wilson #include "gt/intel_gt_pm.h" 122871ea85SChris Wilson #include "gt/intel_ring.h" 13cb823ed9SChris Wilson 1410be98a7SChris Wilson #include "i915_selftest.h" 1510be98a7SChris Wilson #include "selftests/i915_random.h" 1610be98a7SChris Wilson 17c8c197d4SChris Wilson struct context { 18c8c197d4SChris Wilson struct drm_i915_gem_object *obj; 19c8c197d4SChris Wilson struct intel_engine_cs *engine; 20c8c197d4SChris Wilson }; 21c8c197d4SChris Wilson 22c8c197d4SChris Wilson static int cpu_set(struct context *ctx, unsigned long offset, u32 v) 2310be98a7SChris Wilson { 2410be98a7SChris Wilson unsigned int needs_clflush; 2510be98a7SChris Wilson struct page *page; 2610be98a7SChris Wilson void *map; 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); 3610be98a7SChris Wilson map = kmap_atomic(page); 3710be98a7SChris Wilson cpu = map + offset_in_page(offset); 3810be98a7SChris Wilson 3910be98a7SChris Wilson if (needs_clflush & CLFLUSH_BEFORE) 4010be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu)); 4110be98a7SChris Wilson 4210be98a7SChris Wilson *cpu = v; 4310be98a7SChris Wilson 4410be98a7SChris Wilson if (needs_clflush & CLFLUSH_AFTER) 4510be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu)); 4610be98a7SChris Wilson 4710be98a7SChris Wilson kunmap_atomic(map); 48c8c197d4SChris Wilson i915_gem_object_finish_access(ctx->obj); 4910be98a7SChris Wilson 501af343cdSMaarten Lankhorst out: 511af343cdSMaarten Lankhorst i915_gem_object_unlock(ctx->obj); 521af343cdSMaarten Lankhorst return err; 5310be98a7SChris Wilson } 5410be98a7SChris Wilson 55c8c197d4SChris Wilson static int cpu_get(struct context *ctx, unsigned long offset, u32 *v) 5610be98a7SChris Wilson { 5710be98a7SChris Wilson unsigned int needs_clflush; 5810be98a7SChris Wilson struct page *page; 5910be98a7SChris Wilson void *map; 6010be98a7SChris Wilson u32 *cpu; 6110be98a7SChris Wilson int err; 6210be98a7SChris Wilson 631af343cdSMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL); 64c8c197d4SChris Wilson err = i915_gem_object_prepare_read(ctx->obj, &needs_clflush); 6510be98a7SChris Wilson if (err) 661af343cdSMaarten Lankhorst goto out; 6710be98a7SChris Wilson 68c8c197d4SChris Wilson page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT); 6910be98a7SChris Wilson map = kmap_atomic(page); 7010be98a7SChris Wilson cpu = map + offset_in_page(offset); 7110be98a7SChris Wilson 7210be98a7SChris Wilson if (needs_clflush & CLFLUSH_BEFORE) 7310be98a7SChris Wilson drm_clflush_virt_range(cpu, sizeof(*cpu)); 7410be98a7SChris Wilson 7510be98a7SChris Wilson *v = *cpu; 7610be98a7SChris Wilson 7710be98a7SChris Wilson kunmap_atomic(map); 78c8c197d4SChris Wilson i915_gem_object_finish_access(ctx->obj); 7910be98a7SChris Wilson 801af343cdSMaarten Lankhorst out: 811af343cdSMaarten Lankhorst i915_gem_object_unlock(ctx->obj); 821af343cdSMaarten Lankhorst return err; 8310be98a7SChris Wilson } 8410be98a7SChris Wilson 85c8c197d4SChris Wilson static int gtt_set(struct context *ctx, unsigned long offset, u32 v) 8610be98a7SChris Wilson { 8710be98a7SChris Wilson struct i915_vma *vma; 8810be98a7SChris Wilson u32 __iomem *map; 897e805762SChris Wilson int err = 0; 9010be98a7SChris Wilson 9180f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL); 92c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, true); 93c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj); 9410be98a7SChris Wilson if (err) 9510be98a7SChris Wilson return err; 9610be98a7SChris Wilson 97c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE); 9810be98a7SChris Wilson if (IS_ERR(vma)) 9910be98a7SChris Wilson return PTR_ERR(vma); 10010be98a7SChris Wilson 1017e805762SChris Wilson intel_gt_pm_get(vma->vm->gt); 1027e805762SChris Wilson 10310be98a7SChris Wilson map = i915_vma_pin_iomap(vma); 10410be98a7SChris Wilson i915_vma_unpin(vma); 1057e805762SChris Wilson if (IS_ERR(map)) { 1067e805762SChris Wilson err = PTR_ERR(map); 1077e805762SChris Wilson goto out_rpm; 1087e805762SChris Wilson } 10910be98a7SChris Wilson 11010be98a7SChris Wilson iowrite32(v, &map[offset / sizeof(*map)]); 11110be98a7SChris Wilson i915_vma_unpin_iomap(vma); 11210be98a7SChris Wilson 1137e805762SChris Wilson out_rpm: 1147e805762SChris Wilson intel_gt_pm_put(vma->vm->gt); 1157e805762SChris Wilson return err; 11610be98a7SChris Wilson } 11710be98a7SChris Wilson 118c8c197d4SChris Wilson static int gtt_get(struct context *ctx, unsigned long offset, u32 *v) 11910be98a7SChris Wilson { 12010be98a7SChris Wilson struct i915_vma *vma; 12110be98a7SChris Wilson u32 __iomem *map; 1227e805762SChris Wilson int err = 0; 12310be98a7SChris Wilson 12480f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL); 125c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, false); 126c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj); 12710be98a7SChris Wilson if (err) 12810be98a7SChris Wilson return err; 12910be98a7SChris Wilson 130c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, PIN_MAPPABLE); 13110be98a7SChris Wilson if (IS_ERR(vma)) 13210be98a7SChris Wilson return PTR_ERR(vma); 13310be98a7SChris Wilson 1347e805762SChris Wilson intel_gt_pm_get(vma->vm->gt); 1357e805762SChris Wilson 13610be98a7SChris Wilson map = i915_vma_pin_iomap(vma); 13710be98a7SChris Wilson i915_vma_unpin(vma); 1387e805762SChris Wilson if (IS_ERR(map)) { 1397e805762SChris Wilson err = PTR_ERR(map); 1407e805762SChris Wilson goto out_rpm; 1417e805762SChris Wilson } 14210be98a7SChris Wilson 14310be98a7SChris Wilson *v = ioread32(&map[offset / sizeof(*map)]); 14410be98a7SChris Wilson i915_vma_unpin_iomap(vma); 14510be98a7SChris Wilson 1467e805762SChris Wilson out_rpm: 1477e805762SChris Wilson intel_gt_pm_put(vma->vm->gt); 1487e805762SChris Wilson return err; 14910be98a7SChris Wilson } 15010be98a7SChris Wilson 151c8c197d4SChris Wilson static int wc_set(struct context *ctx, unsigned long offset, u32 v) 15210be98a7SChris Wilson { 15310be98a7SChris Wilson u32 *map; 15410be98a7SChris Wilson int err; 15510be98a7SChris Wilson 15680f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL); 157c8c197d4SChris Wilson err = i915_gem_object_set_to_wc_domain(ctx->obj, true); 158c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj); 15910be98a7SChris Wilson if (err) 16010be98a7SChris Wilson return err; 16110be98a7SChris Wilson 162c8c197d4SChris Wilson map = i915_gem_object_pin_map(ctx->obj, I915_MAP_WC); 16310be98a7SChris Wilson if (IS_ERR(map)) 16410be98a7SChris Wilson return PTR_ERR(map); 16510be98a7SChris Wilson 16610be98a7SChris Wilson map[offset / sizeof(*map)] = v; 1679bad40a2SChris Wilson 1689bad40a2SChris Wilson __i915_gem_object_flush_map(ctx->obj, offset, sizeof(*map)); 169c8c197d4SChris Wilson i915_gem_object_unpin_map(ctx->obj); 17010be98a7SChris Wilson 17110be98a7SChris Wilson return 0; 17210be98a7SChris Wilson } 17310be98a7SChris Wilson 174c8c197d4SChris Wilson static int wc_get(struct context *ctx, unsigned long offset, u32 *v) 17510be98a7SChris Wilson { 17610be98a7SChris Wilson u32 *map; 17710be98a7SChris Wilson int err; 17810be98a7SChris Wilson 17980f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL); 180c8c197d4SChris Wilson err = i915_gem_object_set_to_wc_domain(ctx->obj, false); 181c8c197d4SChris Wilson i915_gem_object_unlock(ctx->obj); 18210be98a7SChris Wilson if (err) 18310be98a7SChris Wilson return err; 18410be98a7SChris Wilson 185c8c197d4SChris Wilson map = i915_gem_object_pin_map(ctx->obj, I915_MAP_WC); 18610be98a7SChris Wilson if (IS_ERR(map)) 18710be98a7SChris Wilson return PTR_ERR(map); 18810be98a7SChris Wilson 18910be98a7SChris Wilson *v = map[offset / sizeof(*map)]; 190c8c197d4SChris Wilson i915_gem_object_unpin_map(ctx->obj); 19110be98a7SChris Wilson 19210be98a7SChris Wilson return 0; 19310be98a7SChris Wilson } 19410be98a7SChris Wilson 195c8c197d4SChris Wilson static int gpu_set(struct context *ctx, unsigned long offset, u32 v) 19610be98a7SChris Wilson { 19710be98a7SChris Wilson struct i915_request *rq; 19810be98a7SChris Wilson struct i915_vma *vma; 19910be98a7SChris Wilson u32 *cs; 20010be98a7SChris Wilson int err; 20110be98a7SChris Wilson 20280f0b679SMaarten Lankhorst i915_gem_object_lock(ctx->obj, NULL); 203c8c197d4SChris Wilson err = i915_gem_object_set_to_gtt_domain(ctx->obj, true); 20410be98a7SChris Wilson if (err) 20515b6c924SMaarten Lankhorst goto out_unlock; 20610be98a7SChris Wilson 207c8c197d4SChris Wilson vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, 0); 20815b6c924SMaarten Lankhorst if (IS_ERR(vma)) { 20915b6c924SMaarten Lankhorst err = PTR_ERR(vma); 21015b6c924SMaarten Lankhorst goto out_unlock; 21115b6c924SMaarten Lankhorst } 21210be98a7SChris Wilson 213de5825beSChris Wilson rq = intel_engine_create_kernel_request(ctx->engine); 21410be98a7SChris Wilson if (IS_ERR(rq)) { 21515b6c924SMaarten Lankhorst err = PTR_ERR(rq); 21615b6c924SMaarten Lankhorst goto out_unpin; 21710be98a7SChris Wilson } 21810be98a7SChris Wilson 21910be98a7SChris Wilson cs = intel_ring_begin(rq, 4); 22010be98a7SChris Wilson if (IS_ERR(cs)) { 22115b6c924SMaarten Lankhorst err = PTR_ERR(cs); 22215b6c924SMaarten Lankhorst goto out_rq; 22310be98a7SChris Wilson } 22410be98a7SChris Wilson 225c8c197d4SChris Wilson if (INTEL_GEN(ctx->engine->i915) >= 8) { 22610be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM_GEN4 | 1 << 22; 22710be98a7SChris Wilson *cs++ = lower_32_bits(i915_ggtt_offset(vma) + offset); 22810be98a7SChris Wilson *cs++ = upper_32_bits(i915_ggtt_offset(vma) + offset); 22910be98a7SChris Wilson *cs++ = v; 230c8c197d4SChris Wilson } else if (INTEL_GEN(ctx->engine->i915) >= 4) { 23110be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT; 23210be98a7SChris Wilson *cs++ = 0; 23310be98a7SChris Wilson *cs++ = i915_ggtt_offset(vma) + offset; 23410be98a7SChris Wilson *cs++ = v; 23510be98a7SChris Wilson } else { 23610be98a7SChris Wilson *cs++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL; 23710be98a7SChris Wilson *cs++ = i915_ggtt_offset(vma) + offset; 23810be98a7SChris Wilson *cs++ = v; 23910be98a7SChris Wilson *cs++ = MI_NOOP; 24010be98a7SChris Wilson } 24110be98a7SChris Wilson intel_ring_advance(rq, cs); 24210be98a7SChris Wilson 24370d6894dSChris Wilson err = i915_request_await_object(rq, vma->obj, true); 24470d6894dSChris Wilson if (err == 0) 24510be98a7SChris Wilson err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE); 24610be98a7SChris Wilson 24715b6c924SMaarten Lankhorst out_rq: 24810be98a7SChris Wilson i915_request_add(rq); 24915b6c924SMaarten Lankhorst out_unpin: 25015b6c924SMaarten Lankhorst i915_vma_unpin(vma); 25115b6c924SMaarten Lankhorst out_unlock: 25215b6c924SMaarten Lankhorst i915_gem_object_unlock(ctx->obj); 25310be98a7SChris Wilson 25410be98a7SChris Wilson return err; 25510be98a7SChris Wilson } 25610be98a7SChris Wilson 257c8c197d4SChris Wilson static bool always_valid(struct context *ctx) 25810be98a7SChris Wilson { 25910be98a7SChris Wilson return true; 26010be98a7SChris Wilson } 26110be98a7SChris Wilson 262c8c197d4SChris Wilson static bool needs_fence_registers(struct context *ctx) 26310be98a7SChris Wilson { 264e60f7bb7SMatthew Auld struct intel_gt *gt = ctx->engine->gt; 265e60f7bb7SMatthew Auld 266e60f7bb7SMatthew Auld if (intel_gt_is_wedged(gt)) 267e60f7bb7SMatthew Auld return false; 268e60f7bb7SMatthew Auld 269e60f7bb7SMatthew Auld return gt->ggtt->num_fences; 27010be98a7SChris Wilson } 27110be98a7SChris Wilson 272c8c197d4SChris Wilson static bool needs_mi_store_dword(struct context *ctx) 27310be98a7SChris Wilson { 274c8c197d4SChris Wilson if (intel_gt_is_wedged(ctx->engine->gt)) 27510be98a7SChris Wilson return false; 27610be98a7SChris Wilson 277c8c197d4SChris Wilson return intel_engine_can_store_dword(ctx->engine); 27810be98a7SChris Wilson } 27910be98a7SChris Wilson 28010be98a7SChris Wilson static const struct igt_coherency_mode { 28110be98a7SChris Wilson const char *name; 282c8c197d4SChris Wilson int (*set)(struct context *ctx, unsigned long offset, u32 v); 283c8c197d4SChris Wilson int (*get)(struct context *ctx, unsigned long offset, u32 *v); 284c8c197d4SChris Wilson bool (*valid)(struct context *ctx); 28510be98a7SChris Wilson } igt_coherency_mode[] = { 28610be98a7SChris Wilson { "cpu", cpu_set, cpu_get, always_valid }, 28710be98a7SChris Wilson { "gtt", gtt_set, gtt_get, needs_fence_registers }, 28810be98a7SChris Wilson { "wc", wc_set, wc_get, always_valid }, 28910be98a7SChris Wilson { "gpu", gpu_set, NULL, needs_mi_store_dword }, 29010be98a7SChris Wilson { }, 29110be98a7SChris Wilson }; 29210be98a7SChris Wilson 293c8c197d4SChris Wilson static struct intel_engine_cs * 294c8c197d4SChris Wilson random_engine(struct drm_i915_private *i915, struct rnd_state *prng) 295c8c197d4SChris Wilson { 296c8c197d4SChris Wilson struct intel_engine_cs *engine; 297c8c197d4SChris Wilson unsigned int count; 298c8c197d4SChris Wilson 299c8c197d4SChris Wilson count = 0; 300c8c197d4SChris Wilson for_each_uabi_engine(engine, i915) 301c8c197d4SChris Wilson count++; 302c8c197d4SChris Wilson 303c8c197d4SChris Wilson count = i915_prandom_u32_max_state(count, prng); 304c8c197d4SChris Wilson for_each_uabi_engine(engine, i915) 305c8c197d4SChris Wilson if (count-- == 0) 306c8c197d4SChris Wilson return engine; 307c8c197d4SChris Wilson 308c8c197d4SChris Wilson return NULL; 309c8c197d4SChris Wilson } 310c8c197d4SChris Wilson 31110be98a7SChris Wilson static int igt_gem_coherency(void *arg) 31210be98a7SChris Wilson { 31310be98a7SChris Wilson const unsigned int ncachelines = PAGE_SIZE/64; 31410be98a7SChris Wilson struct drm_i915_private *i915 = arg; 31510be98a7SChris Wilson const struct igt_coherency_mode *read, *write, *over; 31610be98a7SChris Wilson unsigned long count, n; 31710be98a7SChris Wilson u32 *offsets, *values; 318c8c197d4SChris Wilson I915_RND_STATE(prng); 319c8c197d4SChris Wilson struct context ctx; 32010be98a7SChris Wilson int err = 0; 32110be98a7SChris Wilson 322c8c197d4SChris Wilson /* 323c8c197d4SChris Wilson * We repeatedly write, overwrite and read from a sequence of 32410be98a7SChris Wilson * cachelines in order to try and detect incoherency (unflushed writes 32510be98a7SChris Wilson * from either the CPU or GPU). Each setter/getter uses our cache 32610be98a7SChris Wilson * domain API which should prevent incoherency. 32710be98a7SChris Wilson */ 32810be98a7SChris Wilson 32910be98a7SChris Wilson offsets = kmalloc_array(ncachelines, 2*sizeof(u32), GFP_KERNEL); 33010be98a7SChris Wilson if (!offsets) 33110be98a7SChris Wilson return -ENOMEM; 33210be98a7SChris Wilson for (count = 0; count < ncachelines; count++) 33310be98a7SChris Wilson offsets[count] = count * 64 + 4 * (count % 16); 33410be98a7SChris Wilson 33510be98a7SChris Wilson values = offsets + ncachelines; 33610be98a7SChris Wilson 337c8c197d4SChris Wilson ctx.engine = random_engine(i915, &prng); 3386ea578a5SChris Wilson if (!ctx.engine) { 3396ea578a5SChris Wilson err = -ENODEV; 3406ea578a5SChris Wilson goto out_free; 3416ea578a5SChris Wilson } 342c8c197d4SChris Wilson pr_info("%s: using %s\n", __func__, ctx.engine->name); 343f9a863c2SChris Wilson intel_engine_pm_get(ctx.engine); 344c8c197d4SChris Wilson 34510be98a7SChris Wilson for (over = igt_coherency_mode; over->name; over++) { 34610be98a7SChris Wilson if (!over->set) 34710be98a7SChris Wilson continue; 34810be98a7SChris Wilson 349c8c197d4SChris Wilson if (!over->valid(&ctx)) 35010be98a7SChris Wilson continue; 35110be98a7SChris Wilson 35210be98a7SChris Wilson for (write = igt_coherency_mode; write->name; write++) { 35310be98a7SChris Wilson if (!write->set) 35410be98a7SChris Wilson continue; 35510be98a7SChris Wilson 356c8c197d4SChris Wilson if (!write->valid(&ctx)) 35710be98a7SChris Wilson continue; 35810be98a7SChris Wilson 35910be98a7SChris Wilson for (read = igt_coherency_mode; read->name; read++) { 36010be98a7SChris Wilson if (!read->get) 36110be98a7SChris Wilson continue; 36210be98a7SChris Wilson 363c8c197d4SChris Wilson if (!read->valid(&ctx)) 36410be98a7SChris Wilson continue; 36510be98a7SChris Wilson 36610be98a7SChris Wilson for_each_prime_number_from(count, 1, ncachelines) { 367c8c197d4SChris Wilson ctx.obj = i915_gem_object_create_internal(i915, PAGE_SIZE); 368c8c197d4SChris Wilson if (IS_ERR(ctx.obj)) { 369c8c197d4SChris Wilson err = PTR_ERR(ctx.obj); 3706ea578a5SChris Wilson goto out_pm; 37110be98a7SChris Wilson } 37210be98a7SChris Wilson 37310be98a7SChris Wilson i915_random_reorder(offsets, ncachelines, &prng); 37410be98a7SChris Wilson for (n = 0; n < count; n++) 37510be98a7SChris Wilson values[n] = prandom_u32_state(&prng); 37610be98a7SChris Wilson 37710be98a7SChris Wilson for (n = 0; n < count; n++) { 378c8c197d4SChris Wilson err = over->set(&ctx, offsets[n], ~values[n]); 37910be98a7SChris Wilson if (err) { 38010be98a7SChris Wilson pr_err("Failed to set stale value[%ld/%ld] in object using %s, err=%d\n", 38110be98a7SChris Wilson n, count, over->name, err); 38210be98a7SChris Wilson goto put_object; 38310be98a7SChris Wilson } 38410be98a7SChris Wilson } 38510be98a7SChris Wilson 38610be98a7SChris Wilson for (n = 0; n < count; n++) { 387c8c197d4SChris Wilson err = write->set(&ctx, offsets[n], values[n]); 38810be98a7SChris Wilson if (err) { 38910be98a7SChris Wilson pr_err("Failed to set value[%ld/%ld] in object using %s, err=%d\n", 39010be98a7SChris Wilson n, count, write->name, err); 39110be98a7SChris Wilson goto put_object; 39210be98a7SChris Wilson } 39310be98a7SChris Wilson } 39410be98a7SChris Wilson 39510be98a7SChris Wilson for (n = 0; n < count; n++) { 39610be98a7SChris Wilson u32 found; 39710be98a7SChris Wilson 398c8c197d4SChris Wilson err = read->get(&ctx, offsets[n], &found); 39910be98a7SChris Wilson if (err) { 40010be98a7SChris Wilson pr_err("Failed to get value[%ld/%ld] in object using %s, err=%d\n", 40110be98a7SChris Wilson n, count, read->name, err); 40210be98a7SChris Wilson goto put_object; 40310be98a7SChris Wilson } 40410be98a7SChris Wilson 40510be98a7SChris Wilson if (found != values[n]) { 40610be98a7SChris Wilson pr_err("Value[%ld/%ld] mismatch, (overwrite with %s) wrote [%s] %x read [%s] %x (inverse %x), at offset %x\n", 40710be98a7SChris Wilson n, count, over->name, 40810be98a7SChris Wilson write->name, values[n], 40910be98a7SChris Wilson read->name, found, 41010be98a7SChris Wilson ~values[n], offsets[n]); 41110be98a7SChris Wilson err = -EINVAL; 41210be98a7SChris Wilson goto put_object; 41310be98a7SChris Wilson } 41410be98a7SChris Wilson } 41510be98a7SChris Wilson 416c8c197d4SChris Wilson i915_gem_object_put(ctx.obj); 41710be98a7SChris Wilson } 41810be98a7SChris Wilson } 41910be98a7SChris Wilson } 42010be98a7SChris Wilson } 4216ea578a5SChris Wilson out_pm: 422f9a863c2SChris Wilson intel_engine_pm_put(ctx.engine); 4236ea578a5SChris Wilson out_free: 42410be98a7SChris Wilson kfree(offsets); 42510be98a7SChris Wilson return err; 42610be98a7SChris Wilson 42710be98a7SChris Wilson put_object: 428c8c197d4SChris Wilson i915_gem_object_put(ctx.obj); 4296ea578a5SChris Wilson goto out_pm; 43010be98a7SChris Wilson } 43110be98a7SChris Wilson 43210be98a7SChris Wilson int i915_gem_coherency_live_selftests(struct drm_i915_private *i915) 43310be98a7SChris Wilson { 43410be98a7SChris Wilson static const struct i915_subtest tests[] = { 43510be98a7SChris Wilson SUBTEST(igt_gem_coherency), 43610be98a7SChris Wilson }; 43710be98a7SChris Wilson 43810be98a7SChris Wilson return i915_subtests(tests, i915); 43910be98a7SChris Wilson } 440