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drm/i915: Increase I915_PARAM_MMAP_GTT_VERSION version to indicate support for partial mmaps

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Commit 255fc1703e ("drm/i915/gem: Calculate object page offset for partial memory mapping")
was the last patch of several patches fixing multiple partial mmaps.
But without a bump in I915_PARAM_MMAP_GTT_VERSION there is no clean
way for UMD to know if it can do multiple partial mmaps.

Fixes: 255fc1703e ("drm/i915/gem: Calculate object page offset for partial memory mapping")
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Nirmoy Das <nirmoy.das@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250306210827.171147-1-jose.souza@intel.com
(cherry picked from commit bfef148f3680e6b9d28e7fca46d9520f80c5e50e)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
José Roberto de Souza
2025-03-06 13:08:27 -08:00
committed by Rodrigo Vivi
parent 6266f4a781
commit a8045e46c5
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/i915/gem/i915_gem_mman.c
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@@ -164,6 +164,9 @@ static unsigned int tile_row_pages(const struct drm_i915_gem_object *obj)
* 4 - Support multiple fault handlers per object depending on object's
* backing storage (a.k.a. MMAP_OFFSET).
*
* 5 - Support multiple partial mmaps(mmap part of BO + unmap a offset, multiple
* times with different size and offset).
*
* Restrictions:
*
* * snoopable objects cannot be accessed via the GTT. It can cause machine
@@ -191,7 +194,7 @@ static unsigned int tile_row_pages(const struct drm_i915_gem_object *obj)
*/
int i915_gem_mmap_gtt_version(void)
{
return 4;
return 5;
}
static inline struct i915_gtt_view