drm/xe: Assume large page size if VMA not yet bound

The calculation to determine max page size of a VMA during a REMAP
operations assumes the VMA has been bound. This assumption is not true
if the VMA is from an eariler operation in an array of binds. If a VMA
has not been bound use the maximum page size which will ensure the
previous / next REMAP operations are not incorrectly skipped.

Fixes: 8f33b4f054fc ("drm/xe: Avoid doing rebinds")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240205231714.2956225-1-matthew.brost@intel.com

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 7e29b81..ed594fa 100644 (file)
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2200,8 +2200,10 @@ static u64 xe_vma_max_pte_size(struct xe_vma *vma)
                return SZ_1G;
        else if (vma->gpuva.flags & XE_VMA_PTE_2M)
                return SZ_2M;
+       else if (vma->gpuva.flags & XE_VMA_PTE_4K)
+               return SZ_4K;
 
-       return SZ_4K;
+       return SZ_1G;   /* Uninitialized, used max size */
 }
 
 static u64 xe_vma_set_pte_size(struct xe_vma *vma, u64 size)