diff options
Diffstat (limited to 'drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c index 817bef74bbcb..d15cc9d3a5cd 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c @@ -271,6 +271,105 @@ err_obj: return err; } +static int igt_dmabuf_export_kmap(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + struct dma_buf *dmabuf; + void *ptr; + int err; + + obj = i915_gem_object_create(i915, 2*PAGE_SIZE); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + dmabuf = i915_gem_prime_export(&i915->drm, &obj->base, 0); + i915_gem_object_put(obj); + if (IS_ERR(dmabuf)) { + err = PTR_ERR(dmabuf); + pr_err("i915_gem_prime_export failed with err=%d\n", err); + return err; + } + + ptr = dma_buf_kmap(dmabuf, 0); + if (!ptr) { + pr_err("dma_buf_kmap failed\n"); + err = -ENOMEM; + goto err; + } + + if (memchr_inv(ptr, 0, PAGE_SIZE)) { + dma_buf_kunmap(dmabuf, 0, ptr); + pr_err("Exported page[0] not initialiased to zero!\n"); + err = -EINVAL; + goto err; + } + + memset(ptr, 0xc5, PAGE_SIZE); + dma_buf_kunmap(dmabuf, 0, ptr); + + ptr = i915_gem_object_pin_map(obj, I915_MAP_WB); + if (IS_ERR(ptr)) { + err = PTR_ERR(ptr); + pr_err("i915_gem_object_pin_map failed with err=%d\n", err); + goto err; + } + memset(ptr + PAGE_SIZE, 0xaa, PAGE_SIZE); + i915_gem_object_unpin_map(obj); + + ptr = dma_buf_kmap(dmabuf, 1); + if (!ptr) { + pr_err("dma_buf_kmap failed\n"); + err = -ENOMEM; + goto err; + } + + if (memchr_inv(ptr, 0xaa, PAGE_SIZE)) { + dma_buf_kunmap(dmabuf, 1, ptr); + pr_err("Exported page[1] not set to 0xaa!\n"); + err = -EINVAL; + goto err; + } + + memset(ptr, 0xc5, PAGE_SIZE); + dma_buf_kunmap(dmabuf, 1, ptr); + + ptr = dma_buf_kmap(dmabuf, 0); + if (!ptr) { + pr_err("dma_buf_kmap failed\n"); + err = -ENOMEM; + goto err; + } + if (memchr_inv(ptr, 0xc5, PAGE_SIZE)) { + dma_buf_kunmap(dmabuf, 0, ptr); + pr_err("Exported page[0] did not retain 0xc5!\n"); + err = -EINVAL; + goto err; + } + dma_buf_kunmap(dmabuf, 0, ptr); + + ptr = dma_buf_kmap(dmabuf, 2); + if (ptr) { + pr_err("Erroneously kmapped beyond the end of the object!\n"); + dma_buf_kunmap(dmabuf, 2, ptr); + err = -EINVAL; + goto err; + } + + ptr = dma_buf_kmap(dmabuf, -1); + if (ptr) { + pr_err("Erroneously kmapped before the start of the object!\n"); + dma_buf_kunmap(dmabuf, -1, ptr); + err = -EINVAL; + goto err; + } + + err = 0; +err: + dma_buf_put(dmabuf); + return err; +} + int i915_gem_dmabuf_mock_selftests(void) { static const struct i915_subtest tests[] = { @@ -279,6 +378,7 @@ int i915_gem_dmabuf_mock_selftests(void) SUBTEST(igt_dmabuf_import), SUBTEST(igt_dmabuf_import_ownership), SUBTEST(igt_dmabuf_export_vmap), + SUBTEST(igt_dmabuf_export_kmap), }; struct drm_i915_private *i915; int err; |