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iris: Choose PAT entry on imported buffers (xe2)

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Refer to the comment added into the change, buffers imported
with a Xe2 modifier supporting compression should get a
compression-enabled PAT entry.

Signed-off-by: Jianxun Zhang <jianxun.zhang@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34567>
This commit is contained in:
Jianxun Zhang 2024-08-20 17:54:54 -07:00 • committed by Marge Bot
parent 665f5e8757
commit 1149f1c5a1
1 changed files with 16 additions and 1 deletions
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17
src/gallium/drivers/iris/iris_bufmgr.c
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@ -2028,9 +2028,24 @@ iris_bo_import_dmabuf(struct iris_bufmgr *bufmgr, int prime_fd,
bo->index = -1;
bo->real.reusable = false;
bo->real.imported = true;
bo->real.mmap_mode = IRIS_MMAP_NONE;
/* Xe KMD expects at least 1-way coherency for imports */
bo->real.heap = IRIS_HEAP_SYSTEM_MEMORY_CACHED_COHERENT;
bo->real.mmap_mode = IRIS_MMAP_NONE;
/* Xe2+: A bo's heap determines its PAT entry, being scanout or not in the
* vm_binding step later. Unlike allocation time, we don't know about if
* the imported bo will be used for scanout.
*
* We can simply assume the imported buffer will be to display and assign
* compressed + scanout heap to it.
*/
if (modifier == I915_FORMAT_MOD_4_TILED_BMG_CCS) {
bo->real.heap = IRIS_HEAP_DEVICE_LOCAL_COMPRESSED_SCANOUT;
} else if (modifier == I915_FORMAT_MOD_4_TILED_LNL_CCS) {
bo->real.heap = IRIS_HEAP_SYSTEM_MEMORY_UNCACHED_COMPRESSED_SCANOUT;
} else {
assert(bufmgr->devinfo.ver <= 20 || !isl_drm_modifier_has_aux(modifier));
}
if (INTEL_DEBUG(DEBUG_CAPTURE_ALL))
bo->real.capture = true;
bo->gem_handle = handle;