diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2022-12-01 00:58:02 +0100 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@linux.intel.com> | 2022-12-06 10:52:42 +0100 |
| commit | 8e4ee5e87ce60be439eca8d3a65bd870f6821902 (patch) | |
| tree | b61449f19f414017c88b9f840b74659c7b8c7895 /drivers/gpu/drm/i915/i915_vma_resource.h | |
| parent | 09f9b4418e417b6452d1bcd7a9544a68fc1e59d5 (diff) | |
drm/i915: Wrap all access to i915_vma.node.start|size
We already wrap i915_vma.node.start for use with the GGTT, as there we
can perform additional sanity checks that the node belongs to the GGTT
and fits within the 32b registers. In the next couple of patches, we
will introduce guard pages around the objects _inside_ the drm_mm_node
allocation. That is we will offset the vma->pages so that the first page
is at drm_mm_node.start + vma->guard (not 0 as is currently the case).
All users must then not use i915_vma.node.start directly, but compute
the guard offset, thus all users are converted to use a
i915_vma_offset() wrapper.
The notable exceptions are the selftests that are testing exact
behaviour of i915_vma_pin/i915_vma_insert.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
Co-developed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221130235805.221010-3-andi.shyti@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_vma_resource.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vma_resource.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_vma_resource.h b/drivers/gpu/drm/i915/i915_vma_resource.h index 06923d1816e7..54edf3739ca0 100644 --- a/drivers/gpu/drm/i915/i915_vma_resource.h +++ b/drivers/gpu/drm/i915/i915_vma_resource.h @@ -52,8 +52,10 @@ struct i915_page_sizes { * @mr: The memory region of the object pointed to by the vma. * @ops: Pointer to the backend i915_vma_ops. * @private: Bind backend private info. - * @start: Offset into the address space of bind range start. - * @node_size: Size of the allocated range manager node. + * @start: Offset into the address space of bind range start. Note that + * this is after any padding that might have been allocated. + * @node_size: Size of the allocated range manager node with padding + * subtracted. * @vma_size: Bind size. * @page_sizes_gtt: Resulting page sizes from the bind operation. * @bound_flags: Flags indicating binding status. @@ -174,8 +176,8 @@ static inline void i915_vma_resource_put(struct i915_vma_resource *vma_res) * @mr: The memory region of the object the vma points to. * @ops: The backend ops. * @private: Bind backend private info. - * @start: Offset into the address space of bind range start. - * @node_size: Size of the allocated range manager node. + * @start: Offset into the address space of bind range start after padding. + * @node_size: Size of the allocated range manager node minus padding. * @size: Bind size. * * Initializes a vma resource allocated using i915_vma_resource_alloc(). |