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drm/panfrost: Set IOMMU_CACHE flag

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Panfrost does not support uncached mappings, so flag them properly. Also
flag the pages that are mapped as response to a page fault as cached.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20250324185801.168664-2-ariel.dalessandro@collabora.com
This commit is contained in:
Ariel D'Alessandro
2025-03-24 15:57:56 -03:00
committed by Steven Price
parent 586831a417
commit f91e534f4e
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/panfrost/panfrost_mmu.c
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@@ -327,7 +327,7 @@ int panfrost_mmu_map(struct panfrost_gem_mapping *mapping)
struct drm_gem_object *obj = &shmem->base;
struct panfrost_device *pfdev = to_panfrost_device(obj->dev);
struct sg_table *sgt;
int prot = IOMMU_READ | IOMMU_WRITE;
int prot = IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE;
if (WARN_ON(mapping->active))
return 0;
@@ -528,7 +528,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
goto err_map;
mmu_map_sg(pfdev, bomapping->mmu, addr,
IOMMU_WRITE | IOMMU_READ | IOMMU_NOEXEC, sgt);
IOMMU_WRITE | IOMMU_READ | IOMMU_CACHE | IOMMU_NOEXEC, sgt);
bomapping->active = true;
bo->heap_rss_size += SZ_2M;