Hi, Maarten,
On 6/23/20 4:28 PM, Maarten Lankhorst wrote:
i915_gem_ww_ctx is used to lock all gem bo's for pinning and memory
eviction. We don't use it yet, but lets start adding the definition
first.
To use it, we have to pass a non-NULL ww to gem_object_lock, and don't
unlock directly. It is done in i915_gem_ww_ctx_fini.
Changes since v1:
- Change ww_ctx and obj order in locking functions (Jonas Lahtinen)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 4 +-
.../gpu/drm/i915/gem/i915_gem_client_blt.c | 2 +-
drivers/gpu/drm/i915/gem/i915_gem_context.c | 2 +-
drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 4 +-
drivers/gpu/drm/i915/gem/i915_gem_domain.c | 10 ++--
.../gpu/drm/i915/gem/i915_gem_execbuffer.c | 4 +-
drivers/gpu/drm/i915/gem/i915_gem_object.c | 2 +-
drivers/gpu/drm/i915/gem/i915_gem_object.h | 38 +++++++++++---
.../gpu/drm/i915/gem/i915_gem_object_types.h | 9 ++++
drivers/gpu/drm/i915/gem/i915_gem_pm.c | 2 +-
drivers/gpu/drm/i915/gem/i915_gem_tiling.c | 2 +-
.../gpu/drm/i915/gem/selftests/huge_pages.c | 2 +-
.../i915/gem/selftests/i915_gem_client_blt.c | 2 +-
.../i915/gem/selftests/i915_gem_coherency.c | 10 ++--
.../drm/i915/gem/selftests/i915_gem_context.c | 4 +-
.../drm/i915/gem/selftests/i915_gem_mman.c | 4 +-
.../drm/i915/gem/selftests/i915_gem_phys.c | 2 +-
.../gpu/drm/i915/gt/selftest_workarounds.c | 2 +-
drivers/gpu/drm/i915/gvt/cmd_parser.c | 2 +-
drivers/gpu/drm/i915/i915_gem.c | 52 +++++++++++++++++--
drivers/gpu/drm/i915/i915_gem.h | 11 ++++
drivers/gpu/drm/i915/selftests/i915_gem.c | 41 +++++++++++++++
drivers/gpu/drm/i915/selftests/i915_vma.c | 2 +-
.../drm/i915/selftests/intel_memory_region.c | 2 +-
24 files changed, 173 insertions(+), 42 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 b1f82a11aef2..3740c0080e38 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -122,6 +122,15 @@ struct drm_i915_gem_object {
*/
struct list_head lut_list;
+ /**
+ * @obj_link: Link into @i915_gem_ww_ctx.obj_list
+ *
+ * When we lock this object through i915_gem_object_lock() with a
+ * context, we add it to the list to ensure we can unlock everything
+ * when i915_gem_ww_ctx_backoff() or i915_gem_ww_ctx_fini() are called.
+ */
+ struct list_head obj_link;
+
Since we don't refcount objects on the list, (and we shouldn't need to),
perhaps a debug warning if during object destruction, this isn't an
empty list head?
Other than that, this patch looks good to me.
Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxx>
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