diff options
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_object_types.h | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_region.c | 22 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/intel_memory_region.c | 87 |
3 files changed, 113 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 69d6e54bc569..0727d0c76aa0 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -172,11 +172,13 @@ struct drm_i915_gem_object { #define I915_BO_ALLOC_CONTIGUOUS BIT(0) #define I915_BO_ALLOC_VOLATILE BIT(1) #define I915_BO_ALLOC_STRUCT_PAGE BIT(2) +#define I915_BO_ALLOC_CPU_CLEAR BIT(3) #define I915_BO_ALLOC_FLAGS (I915_BO_ALLOC_CONTIGUOUS | \ I915_BO_ALLOC_VOLATILE | \ - I915_BO_ALLOC_STRUCT_PAGE) -#define I915_BO_READONLY BIT(3) -#define I915_TILING_QUIRK_BIT 4 /* unknown swizzling; do not release! */ + I915_BO_ALLOC_STRUCT_PAGE | \ + I915_BO_ALLOC_CPU_CLEAR) +#define I915_BO_READONLY BIT(4) +#define I915_TILING_QUIRK_BIT 5 /* unknown swizzling; do not release! */ /* * Is the object to be mapped as read-only to the GPU diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c index 6a84fb6dde24..ce8fcfc54079 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c @@ -95,6 +95,28 @@ i915_gem_object_get_pages_buddy(struct drm_i915_gem_object *obj) sg_mark_end(sg); i915_sg_trim(st); + /* Intended for kernel internal use only */ + if (obj->flags & I915_BO_ALLOC_CPU_CLEAR) { + struct scatterlist *sg; + unsigned long i; + + for_each_sg(st->sgl, sg, st->nents, i) { + unsigned int length; + void __iomem *vaddr; + dma_addr_t daddr; + + daddr = sg_dma_address(sg); + daddr -= mem->region.start; + length = sg_dma_len(sg); + + vaddr = io_mapping_map_wc(&mem->iomap, daddr, length); + memset64((void __force *)vaddr, 0, length / sizeof(u64)); + io_mapping_unmap(vaddr); + } + + wmb(); + } + __i915_gem_object_set_pages(obj, st, sg_page_sizes); return 0; diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c b/drivers/gpu/drm/i915/selftests/intel_memory_region.c index a5fc0bf3feb9..f85fd8cbfbf5 100644 --- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c +++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c @@ -513,7 +513,7 @@ static int igt_cpu_check(struct drm_i915_gem_object *obj, u32 dword, u32 val) if (err) return err; - ptr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC); + ptr = i915_gem_object_pin_map(obj, I915_MAP_WC); if (IS_ERR(ptr)) return PTR_ERR(ptr); @@ -593,7 +593,9 @@ static int igt_gpu_write(struct i915_gem_context *ctx, if (err) break; + i915_gem_object_lock(obj, NULL); err = igt_cpu_check(obj, dword, rng); + i915_gem_object_unlock(obj); if (err) break; } while (!__igt_timeout(end_time, NULL)); @@ -629,6 +631,88 @@ out_put: return err; } +static int igt_lmem_create_cleared_cpu(void *arg) +{ + struct drm_i915_private *i915 = arg; + I915_RND_STATE(prng); + IGT_TIMEOUT(end_time); + u32 size, i; + int err; + + i915_gem_drain_freed_objects(i915); + + size = max_t(u32, PAGE_SIZE, i915_prandom_u32_max_state(SZ_32M, &prng)); + size = round_up(size, PAGE_SIZE); + i = 0; + + do { + struct drm_i915_gem_object *obj; + unsigned int flags; + u32 dword, val; + void *vaddr; + + /* + * Alternate between cleared and uncleared allocations, while + * also dirtying the pages each time to check that the pages are + * always cleared if requested, since we should get some overlap + * of the underlying pages, if not all, since we are the only + * user. + */ + + flags = I915_BO_ALLOC_CPU_CLEAR; + if (i & 1) + flags = 0; + + obj = i915_gem_object_create_lmem(i915, size, flags); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + i915_gem_object_lock(obj, NULL); + err = i915_gem_object_pin_pages(obj); + if (err) + goto out_put; + + dword = i915_prandom_u32_max_state(PAGE_SIZE / sizeof(u32), + &prng); + + if (flags & I915_BO_ALLOC_CPU_CLEAR) { + err = igt_cpu_check(obj, dword, 0); + if (err) { + pr_err("%s failed with size=%u, flags=%u\n", + __func__, size, flags); + goto out_unpin; + } + } + + vaddr = i915_gem_object_pin_map(obj, I915_MAP_WC); + if (IS_ERR(vaddr)) { + err = PTR_ERR(vaddr); + goto out_unpin; + } + + val = prandom_u32_state(&prng); + + memset32(vaddr, val, obj->base.size / sizeof(u32)); + + i915_gem_object_flush_map(obj); + i915_gem_object_unpin_map(obj); +out_unpin: + i915_gem_object_unpin_pages(obj); + __i915_gem_object_put_pages(obj); +out_put: + i915_gem_object_unlock(obj); + i915_gem_object_put(obj); + + if (err) + break; + ++i; + } while (!__igt_timeout(end_time, NULL)); + + pr_info("%s completed (%u) iterations\n", __func__, i); + + return err; +} + static int igt_lmem_write_gpu(void *arg) { struct drm_i915_private *i915 = arg; @@ -1043,6 +1127,7 @@ int intel_memory_region_live_selftests(struct drm_i915_private *i915) { static const struct i915_subtest tests[] = { SUBTEST(igt_lmem_create), + SUBTEST(igt_lmem_create_cleared_cpu), SUBTEST(igt_lmem_write_cpu), SUBTEST(igt_lmem_write_gpu), }; |