diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c new file mode 100644 index 000000000000..2fda549dd82d --- /dev/null +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c @@ -0,0 +1,560 @@ +/* + * SPDX-License-Identifier: MIT + * + * Copyright © 2016 Intel Corporation + */ + +#include "i915_drv.h" +#include "i915_selftest.h" +#include "gem/i915_gem_context.h" +#include "gt/intel_gt.h" + +#include "mock_context.h" +#include "mock_dmabuf.h" +#include "igt_gem_utils.h" +#include "selftests/mock_drm.h" +#include "selftests/mock_gem_device.h" + +static int igt_dmabuf_export(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + struct dma_buf *dmabuf; + + obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + dmabuf = i915_gem_prime_export(&obj->base, 0); + i915_gem_object_put(obj); + if (IS_ERR(dmabuf)) { + pr_err("i915_gem_prime_export failed with err=%d\n", + (int)PTR_ERR(dmabuf)); + return PTR_ERR(dmabuf); + } + + dma_buf_put(dmabuf); + return 0; +} + +static int igt_dmabuf_import_self(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj, *import_obj; + struct drm_gem_object *import; + struct dma_buf *dmabuf; + int err; + + obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + dmabuf = i915_gem_prime_export(&obj->base, 0); + if (IS_ERR(dmabuf)) { + pr_err("i915_gem_prime_export failed with err=%d\n", + (int)PTR_ERR(dmabuf)); + err = PTR_ERR(dmabuf); + goto out; + } + + import = i915_gem_prime_import(&i915->drm, dmabuf); + if (IS_ERR(import)) { + pr_err("i915_gem_prime_import failed with err=%d\n", + (int)PTR_ERR(import)); + err = PTR_ERR(import); + goto out_dmabuf; + } + import_obj = to_intel_bo(import); + + if (import != &obj->base) { + pr_err("i915_gem_prime_import created a new object!\n"); + err = -EINVAL; + goto out_import; + } + + i915_gem_object_lock(import_obj, NULL); + err = __i915_gem_object_get_pages(import_obj); + i915_gem_object_unlock(import_obj); + if (err) { + pr_err("Same object dma-buf get_pages failed!\n"); + goto out_import; + } + + err = 0; +out_import: + i915_gem_object_put(import_obj); +out_dmabuf: + dma_buf_put(dmabuf); +out: + i915_gem_object_put(obj); + return err; +} + +static int igt_dmabuf_import_same_driver_lmem(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct intel_memory_region *lmem = i915->mm.regions[INTEL_REGION_LMEM_0]; + struct drm_i915_gem_object *obj; + struct drm_gem_object *import; + struct dma_buf *dmabuf; + int err; + + if (!lmem) + return 0; + + force_different_devices = true; + + obj = __i915_gem_object_create_user(i915, PAGE_SIZE, &lmem, 1); + if (IS_ERR(obj)) { + pr_err("__i915_gem_object_create_user failed with err=%ld\n", + PTR_ERR(obj)); + err = PTR_ERR(obj); + goto out_ret; + } + + dmabuf = i915_gem_prime_export(&obj->base, 0); + if (IS_ERR(dmabuf)) { + pr_err("i915_gem_prime_export failed with err=%ld\n", + PTR_ERR(dmabuf)); + err = PTR_ERR(dmabuf); + goto out; + } + + /* + * We expect an import of an LMEM-only object to fail with + * -EOPNOTSUPP because it can't be migrated to SMEM. + */ + import = i915_gem_prime_import(&i915->drm, dmabuf); + if (!IS_ERR(import)) { + drm_gem_object_put(import); + pr_err("i915_gem_prime_import succeeded when it shouldn't have\n"); + err = -EINVAL; + } else if (PTR_ERR(import) != -EOPNOTSUPP) { + pr_err("i915_gem_prime_import failed with the wrong err=%ld\n", + PTR_ERR(import)); + err = PTR_ERR(import); + } else { + err = 0; + } + + dma_buf_put(dmabuf); +out: + i915_gem_object_put(obj); +out_ret: + force_different_devices = false; + return err; +} + +static int verify_access(struct drm_i915_private *i915, + struct drm_i915_gem_object *native_obj, + struct drm_i915_gem_object *import_obj) +{ + struct i915_gem_engines_iter it; + struct i915_gem_context *ctx; + struct intel_context *ce; + struct i915_vma *vma; + struct file *file; + u32 *vaddr; + int err = 0, i; + unsigned int mode; + + file = mock_file(i915); + if (IS_ERR(file)) + return PTR_ERR(file); + + ctx = live_context(i915, file); + if (IS_ERR(ctx)) { + err = PTR_ERR(ctx); + goto out_file; + } + + for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { + if (intel_engine_can_store_dword(ce->engine)) + break; + } + i915_gem_context_unlock_engines(ctx); + if (!ce) + goto out_file; + + vma = i915_vma_instance(import_obj, ce->vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto out_file; + } + + err = i915_vma_pin(vma, 0, 0, PIN_USER); + if (err) + goto out_file; + + err = igt_gpu_fill_dw(ce, vma, 0, + vma->size >> PAGE_SHIFT, 0xdeadbeaf); + i915_vma_unpin(vma); + if (err) + goto out_file; + + err = i915_gem_object_wait(import_obj, 0, MAX_SCHEDULE_TIMEOUT); + if (err) + goto out_file; + + mode = intel_gt_coherent_map_type(to_gt(i915), native_obj, false); + vaddr = i915_gem_object_pin_map_unlocked(native_obj, mode); + if (IS_ERR(vaddr)) { + err = PTR_ERR(vaddr); + goto out_file; + } + + for (i = 0; i < native_obj->base.size / sizeof(u32); i += PAGE_SIZE / sizeof(u32)) { + if (vaddr[i] != 0xdeadbeaf) { + pr_err("Data mismatch [%d]=%u\n", i, vaddr[i]); + err = -EINVAL; + goto out_file; + } + } + +out_file: + fput(file); + return err; +} + +static int igt_dmabuf_import_same_driver(struct drm_i915_private *i915, + struct intel_memory_region **regions, + unsigned int num_regions) +{ + struct drm_i915_gem_object *obj, *import_obj; + struct drm_gem_object *import; + struct dma_buf *dmabuf; + struct dma_buf_attachment *import_attach; + struct sg_table *st; + long timeout; + int err; + + force_different_devices = true; + + obj = __i915_gem_object_create_user(i915, SZ_8M, + regions, num_regions); + if (IS_ERR(obj)) { + pr_err("__i915_gem_object_create_user failed with err=%ld\n", + PTR_ERR(obj)); + err = PTR_ERR(obj); + goto out_ret; + } + + dmabuf = i915_gem_prime_export(&obj->base, 0); + if (IS_ERR(dmabuf)) { + pr_err("i915_gem_prime_export failed with err=%ld\n", + PTR_ERR(dmabuf)); + err = PTR_ERR(dmabuf); + goto out; + } + + import = i915_gem_prime_import(&i915->drm, dmabuf); + if (IS_ERR(import)) { + pr_err("i915_gem_prime_import failed with err=%ld\n", + PTR_ERR(import)); + err = PTR_ERR(import); + goto out_dmabuf; + } + import_obj = to_intel_bo(import); + + if (import == &obj->base) { + pr_err("i915_gem_prime_import reused gem object!\n"); + err = -EINVAL; + goto out_import; + } + + i915_gem_object_lock(import_obj, NULL); + err = __i915_gem_object_get_pages(import_obj); + if (err) { + pr_err("Different objects dma-buf get_pages failed!\n"); + i915_gem_object_unlock(import_obj); + goto out_import; + } + + /* + * If the exported object is not in system memory, something + * weird is going on. TODO: When p2p is supported, this is no + * longer considered weird. + */ + if (obj->mm.region != i915->mm.regions[INTEL_REGION_SMEM]) { + pr_err("Exported dma-buf is not in system memory\n"); + err = -EINVAL; + } + + i915_gem_object_unlock(import_obj); + + err = verify_access(i915, obj, import_obj); + if (err) + goto out_import; + + /* Now try a fake an importer */ + import_attach = dma_buf_attach(dmabuf, obj->base.dev->dev); + if (IS_ERR(import_attach)) { + err = PTR_ERR(import_attach); + goto out_import; + } + + st = dma_buf_map_attachment_unlocked(import_attach, DMA_BIDIRECTIONAL); + if (IS_ERR(st)) { + err = PTR_ERR(st); + goto out_detach; + } + + timeout = dma_resv_wait_timeout(dmabuf->resv, DMA_RESV_USAGE_WRITE, + true, 5 * HZ); + if (!timeout) { + pr_err("dmabuf wait for exclusive fence timed out.\n"); + timeout = -ETIME; + } + err = timeout > 0 ? 0 : timeout; + dma_buf_unmap_attachment_unlocked(import_attach, st, DMA_BIDIRECTIONAL); +out_detach: + dma_buf_detach(dmabuf, import_attach); +out_import: + i915_gem_object_put(import_obj); +out_dmabuf: + dma_buf_put(dmabuf); +out: + i915_gem_object_put(obj); +out_ret: + force_different_devices = false; + return err; +} + +static int igt_dmabuf_import_same_driver_smem(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct intel_memory_region *smem = i915->mm.regions[INTEL_REGION_SMEM]; + + return igt_dmabuf_import_same_driver(i915, &smem, 1); +} + +static int igt_dmabuf_import_same_driver_lmem_smem(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct intel_memory_region *regions[2]; + + if (!i915->mm.regions[INTEL_REGION_LMEM_0]) + return 0; + + regions[0] = i915->mm.regions[INTEL_REGION_LMEM_0]; + regions[1] = i915->mm.regions[INTEL_REGION_SMEM]; + return igt_dmabuf_import_same_driver(i915, regions, 2); +} + +static int igt_dmabuf_import(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + struct dma_buf *dmabuf; + void *obj_map, *dma_map; + struct iosys_map map; + u32 pattern[] = { 0, 0xaa, 0xcc, 0x55, 0xff }; + int err, i; + + dmabuf = mock_dmabuf(1); + if (IS_ERR(dmabuf)) + return PTR_ERR(dmabuf); + + obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf)); + if (IS_ERR(obj)) { + pr_err("i915_gem_prime_import failed with err=%d\n", + (int)PTR_ERR(obj)); + err = PTR_ERR(obj); + goto out_dmabuf; + } + + if (obj->base.dev != &i915->drm) { + pr_err("i915_gem_prime_import created a non-i915 object!\n"); + err = -EINVAL; + goto out_obj; + } + + if (obj->base.size != PAGE_SIZE) { + pr_err("i915_gem_prime_import is wrong size found %lld, expected %ld\n", + (long long)obj->base.size, PAGE_SIZE); + err = -EINVAL; + goto out_obj; + } + + err = dma_buf_vmap_unlocked(dmabuf, &map); + dma_map = err ? NULL : map.vaddr; + if (!dma_map) { + pr_err("dma_buf_vmap failed\n"); + err = -ENOMEM; + goto out_obj; + } + + if (0) { /* Can not yet map dmabuf */ + obj_map = i915_gem_object_pin_map(obj, I915_MAP_WB); + if (IS_ERR(obj_map)) { + err = PTR_ERR(obj_map); + pr_err("i915_gem_object_pin_map failed with err=%d\n", err); + goto out_dma_map; + } + + for (i = 0; i < ARRAY_SIZE(pattern); i++) { + memset(dma_map, pattern[i], PAGE_SIZE); + if (memchr_inv(obj_map, pattern[i], PAGE_SIZE)) { + err = -EINVAL; + pr_err("imported vmap not all set to %x!\n", pattern[i]); + i915_gem_object_unpin_map(obj); + goto out_dma_map; + } + } + + for (i = 0; i < ARRAY_SIZE(pattern); i++) { + memset(obj_map, pattern[i], PAGE_SIZE); + if (memchr_inv(dma_map, pattern[i], PAGE_SIZE)) { + err = -EINVAL; + pr_err("exported vmap not all set to %x!\n", pattern[i]); + i915_gem_object_unpin_map(obj); + goto out_dma_map; + } + } + + i915_gem_object_unpin_map(obj); + } + + err = 0; +out_dma_map: + dma_buf_vunmap_unlocked(dmabuf, &map); +out_obj: + i915_gem_object_put(obj); +out_dmabuf: + dma_buf_put(dmabuf); + return err; +} + +static int igt_dmabuf_import_ownership(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + struct dma_buf *dmabuf; + struct iosys_map map; + void *ptr; + int err; + + dmabuf = mock_dmabuf(1); + if (IS_ERR(dmabuf)) + return PTR_ERR(dmabuf); + + err = dma_buf_vmap_unlocked(dmabuf, &map); + ptr = err ? NULL : map.vaddr; + if (!ptr) { + pr_err("dma_buf_vmap failed\n"); + err = -ENOMEM; + goto err_dmabuf; + } + + memset(ptr, 0xc5, PAGE_SIZE); + dma_buf_vunmap_unlocked(dmabuf, &map); + + obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf)); + if (IS_ERR(obj)) { + pr_err("i915_gem_prime_import failed with err=%d\n", + (int)PTR_ERR(obj)); + err = PTR_ERR(obj); + goto err_dmabuf; + } + + dma_buf_put(dmabuf); + + err = i915_gem_object_pin_pages_unlocked(obj); + if (err) { + pr_err("i915_gem_object_pin_pages failed with err=%d\n", err); + goto out_obj; + } + + err = 0; + i915_gem_object_unpin_pages(obj); +out_obj: + i915_gem_object_put(obj); + return err; + +err_dmabuf: + dma_buf_put(dmabuf); + return err; +} + +static int igt_dmabuf_export_vmap(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + struct dma_buf *dmabuf; + struct iosys_map map; + void *ptr; + int err; + + obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + dmabuf = i915_gem_prime_export(&obj->base, 0); + if (IS_ERR(dmabuf)) { + pr_err("i915_gem_prime_export failed with err=%d\n", + (int)PTR_ERR(dmabuf)); + err = PTR_ERR(dmabuf); + goto err_obj; + } + i915_gem_object_put(obj); + + err = dma_buf_vmap_unlocked(dmabuf, &map); + ptr = err ? NULL : map.vaddr; + if (!ptr) { + pr_err("dma_buf_vmap failed\n"); + err = -ENOMEM; + goto out; + } + + if (!mem_is_zero(ptr, dmabuf->size)) { + pr_err("Exported object not initialised to zero!\n"); + err = -EINVAL; + goto out; + } + + memset(ptr, 0xc5, dmabuf->size); + + err = 0; + dma_buf_vunmap_unlocked(dmabuf, &map); +out: + dma_buf_put(dmabuf); + return err; + +err_obj: + i915_gem_object_put(obj); + return err; +} + +int i915_gem_dmabuf_mock_selftests(void) +{ + static const struct i915_subtest tests[] = { + SUBTEST(igt_dmabuf_export), + SUBTEST(igt_dmabuf_import_self), + SUBTEST(igt_dmabuf_import), + SUBTEST(igt_dmabuf_import_ownership), + SUBTEST(igt_dmabuf_export_vmap), + }; + struct drm_i915_private *i915; + int err; + + i915 = mock_gem_device(); + if (!i915) + return -ENOMEM; + + err = i915_subtests(tests, i915); + + mock_destroy_device(i915); + return err; +} + +int i915_gem_dmabuf_live_selftests(struct drm_i915_private *i915) +{ + static const struct i915_subtest tests[] = { + SUBTEST(igt_dmabuf_export), + SUBTEST(igt_dmabuf_import_same_driver_lmem), + SUBTEST(igt_dmabuf_import_same_driver_smem), + SUBTEST(igt_dmabuf_import_same_driver_lmem_smem), + }; + + return i915_live_subtests(tests, i915); +} |