drm/i915/gem: Only revoke the GGTT mmappings on aperture detiling changes

Only a GGTT mmapping will use the aperture detiling registers, so on a
tiling change for an object, we only need to revoke those mmappings and
not the CPU mmappings (which are always linear irrespective of the tiling).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702163623.6402-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index fe27c5b..7c2650c 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -448,7 +448,7 @@ void __i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj)
  * mapping will then trigger a page fault on the next user access, allowing
  * fixup by vm_fault_gtt().
  */
-static void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj)
+void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj)
 {
        struct drm_i915_private *i915 = to_i915(obj->base.dev);
        intel_wakeref_t wakeref;

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.h b/drivers/gpu/drm/i915/gem/i915_gem_mman.h
index 862e01b..7c5ccdf 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.h
@@ -24,8 +24,11 @@ int i915_gem_dumb_mmap_offset(struct drm_file *file_priv,
                              struct drm_device *dev,
                              u32 handle, u64 *offset);
 
-void __i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj);
 void i915_gem_object_release_mmap(struct drm_i915_gem_object *obj);
+
+void __i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj);
+void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj);
+
 void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj);
 
 #endif

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_tiling.c b/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
index 0158e49..ff72ee2 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
@@ -299,7 +299,7 @@ i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
        i915_gem_object_unlock(obj);
 
        /* Force the fence to be reacquired for GTT access */
-       i915_gem_object_release_mmap(obj);
+       i915_gem_object_release_mmap_gtt(obj);
 
        /* Try to preallocate memory required to save swizzling on put-pages */
        if (i915_gem_object_needs_bit17_swizzle(obj)) {