From: Thomas Hellström thomas.hellstrom@linux.intel.com
Until we support p2p dma or as a complement to that, migrate data to system memory at dma-buf attach time if possible.
v2: - Rebase on dynamic exporter. Update the igt_dmabuf_import_same_driver selftest to migrate if we are LMEM capable. v3: - Migrate also in the pin() callback. v4: - Migrate in attach
Signed-off-by: Thomas Hellström thomas.hellstrom@linux.intel.com Signed-off-by: Michael J. Ruhl michael.j.ruhl@intel.com --- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 12 +++++++++++- drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c | 4 +++- 2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index ccae17d5f441..280291a4a9dc 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c @@ -170,9 +170,19 @@ static int i915_gem_dmabuf_attach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) { struct drm_i915_gem_object *obj = dma_buf_to_obj(dmabuf); + int ret;
assert_object_held(obj); - return i915_gem_object_pin_pages(obj); + + if (!i915_gem_object_can_migrate(obj, INTEL_REGION_SMEM)) + return -EOPNOTSUPP; + ret = i915_gem_object_migrate(obj, NULL, INTEL_REGION_SMEM); + if (!ret) + ret = i915_gem_object_wait_migration(obj, 0); + if (!ret) + ret = i915_gem_object_pin_pages(obj); + + return ret; }
static void i915_gem_dmabuf_detach(struct dma_buf *dmabuf, diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c index 868b3469ecbd..b1e87ec08741 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c @@ -106,7 +106,9 @@ static int igt_dmabuf_import_same_driver(void *arg) int err;
force_different_devices = true; - obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); + obj = i915_gem_object_create_lmem(i915, PAGE_SIZE, 0); + if (IS_ERR(obj)) + obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); if (IS_ERR(obj)) goto out_ret;