[PATCH 11/15] drm/i915: Update the GGTT size/alignment query functions
Chris Wilson
chris at chris-wilson.co.uk
Thu Aug 4 13:28:16 UTC 2016
In order to be consistent with other address space functions, we want to
pass around 64-bit sizes, even though all known global GTT are limited
to 4GiB. Similarly, we are trying to be consistent in using the _ggtt_
nomenclature when referring to the special global GTT.
v2: Update docs to consistently state "global GTT".
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 8 ++--
drivers/gpu/drm/i915/i915_gem.c | 81 +++++++++++++++++++---------------
drivers/gpu/drm/i915/i915_gem_tiling.c | 3 +-
3 files changed, 51 insertions(+), 41 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1e1369319326..b6e56ecb8637 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3241,11 +3241,9 @@ int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
int i915_gem_open(struct drm_device *dev, struct drm_file *file);
void i915_gem_release(struct drm_device *dev, struct drm_file *file);
-uint32_t
-i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode);
-uint32_t
-i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
- int tiling_mode, bool fenced);
+u64 i915_gem_get_ggtt_size(struct drm_device *dev, u64 size, int tiling_mode);
+u64 i915_gem_get_ggtt_alignment(struct drm_device *dev, u64 size,
+ int tiling_mode, bool fenced);
int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
enum i915_cache_level cache_level);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index eedb80451dd5..0be3c5e4d307 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1847,46 +1847,57 @@ i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv)
i915_gem_release_mmap(obj);
}
-uint32_t
-i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode)
+/**
+ * i915_gem_get_ggtt_size - return required global GTT size for an object
+ * @dev: drm device
+ * @size: object size
+ * @tiling_mode: tiling mode
+ *
+ * Return the required global GTT size for an object, taking into account
+ * potential fence register mapping.
+ */
+u64 i915_gem_get_ggtt_size(struct drm_device *dev, u64 size, int tiling_mode)
{
- uint32_t gtt_size;
+ u64 ggtt_size;
- if (INTEL_INFO(dev)->gen >= 4 ||
+ GEM_BUG_ON(size == 0);
+
+ if (INTEL_GEN(dev) >= 4 ||
tiling_mode == I915_TILING_NONE)
return size;
/* Previous chips need a power-of-two fence region when tiling */
if (IS_GEN3(dev))
- gtt_size = 1024*1024;
+ ggtt_size = 1024*1024;
else
- gtt_size = 512*1024;
+ ggtt_size = 512*1024;
- while (gtt_size < size)
- gtt_size <<= 1;
+ while (ggtt_size < size)
+ ggtt_size <<= 1;
- return gtt_size;
+ return ggtt_size;
}
/**
- * i915_gem_get_gtt_alignment - return required GTT alignment for an object
+ * i915_gem_get_ggtt_alignment - return required global GTT alignment
* @dev: drm device
* @size: object size
* @tiling_mode: tiling mode
- * @fenced: is fenced alignemned required or not
+ * @fenced: is fenced alignment required or not
*
- * Return the required GTT alignment for an object, taking into account
+ * Return the required global GTT alignment for an object, taking into account
* potential fence register mapping.
*/
-uint32_t
-i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
- int tiling_mode, bool fenced)
+u64 i915_gem_get_ggtt_alignment(struct drm_device *dev, u64 size,
+ int tiling_mode, bool fenced)
{
+ GEM_BUG_ON(size == 0);
+
/*
* Minimum alignment is 4k (GTT page size), but might be greater
* if a fence register is needed for the object.
*/
- if (INTEL_INFO(dev)->gen >= 4 || (!fenced && IS_G33(dev)) ||
+ if (INTEL_GEN(dev) >= 4 || (!fenced && IS_G33(dev)) ||
tiling_mode == I915_TILING_NONE)
return 4096;
@@ -1894,7 +1905,7 @@ i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
* Previous chips need to be aligned to the size of the smallest
* fence register that can contain the object.
*/
- return i915_gem_get_gtt_size(dev, size, tiling_mode);
+ return i915_gem_get_ggtt_size(dev, size, tiling_mode);
}
static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj)
@@ -2984,17 +2995,17 @@ i915_gem_object_insert_into_vm(struct drm_i915_gem_object *obj,
view_size = i915_ggtt_view_size(obj, ggtt_view);
- fence_size = i915_gem_get_gtt_size(dev,
- view_size,
- obj->tiling_mode);
- fence_alignment = i915_gem_get_gtt_alignment(dev,
- view_size,
- obj->tiling_mode,
- true);
- unfenced_alignment = i915_gem_get_gtt_alignment(dev,
- view_size,
- obj->tiling_mode,
- false);
+ fence_size = i915_gem_get_ggtt_size(dev,
+ view_size,
+ obj->tiling_mode);
+ fence_alignment = i915_gem_get_ggtt_alignment(dev,
+ view_size,
+ obj->tiling_mode,
+ true);
+ unfenced_alignment = i915_gem_get_ggtt_alignment(dev,
+ view_size,
+ obj->tiling_mode,
+ false);
size = max(size, view_size);
if (flags & PIN_MAPPABLE)
size = max_t(u64, size, fence_size);
@@ -3698,13 +3709,13 @@ void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
bool mappable, fenceable;
u32 fence_size, fence_alignment;
- fence_size = i915_gem_get_gtt_size(obj->base.dev,
- obj->base.size,
- obj->tiling_mode);
- fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev,
- obj->base.size,
- obj->tiling_mode,
- true);
+ fence_size = i915_gem_get_ggtt_size(obj->base.dev,
+ obj->base.size,
+ obj->tiling_mode);
+ fence_alignment = i915_gem_get_ggtt_alignment(obj->base.dev,
+ obj->base.size,
+ obj->tiling_mode,
+ true);
fenceable = (vma->node.size == fence_size &&
(vma->node.start & (fence_alignment - 1)) == 0);
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index fa2eb4a4f212..4e42da691e4e 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -133,7 +133,8 @@ i915_gem_object_fence_ok(struct drm_i915_gem_object *obj, int tiling_mode)
return false;
}
- size = i915_gem_get_gtt_size(obj->base.dev, obj->base.size, tiling_mode);
+ size = i915_gem_get_ggtt_size(obj->base.dev,
+ obj->base.size, tiling_mode);
if (i915_gem_obj_ggtt_size(obj) != size)
return false;
--
2.8.1
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