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drm/etnaviv: Fix page property being used for non writecombine buffers

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[ Upstream commit 834f304192 ]

In the etnaviv_gem_vmap_impl() function, the driver vmap whatever buffers
with write combine(WC) page property, this is incorrect. Cached buffers
should be mapped with the cached page property and uncached buffers should
be mapped with the uncached page property.

Fixes: a0a5ab3e99 ("drm/etnaviv: call correct function when trying to vmap a DMABUF")
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sui Jingfeng
2024-11-04 08:41:56 +08:00
committed by Greg Kroah-Hartman
parent ae7d487347
commit cb52be0765
1 changed files with 14 additions and 2 deletions
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drivers/gpu/drm/etnaviv/etnaviv_gem.c
+14 -2
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@@ -342,6 +342,7 @@ void *etnaviv_gem_vmap(struct drm_gem_object *obj)
static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj)
{
struct page **pages;
pgprot_t prot;
lockdep_assert_held(&obj->lock);
@@ -349,8 +350,19 @@ static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj)
if (IS_ERR(pages))
return NULL;
return vmap(pages, obj->base.size >> PAGE_SHIFT,
VM_MAP, pgprot_writecombine(PAGE_KERNEL));
switch (obj->flags & ETNA_BO_CACHE_MASK) {
case ETNA_BO_CACHED:
prot = PAGE_KERNEL;
break;
case ETNA_BO_UNCACHED:
prot = pgprot_noncached(PAGE_KERNEL);
break;
case ETNA_BO_WC:
default:
prot = pgprot_writecombine(PAGE_KERNEL);
}
return vmap(pages, obj->base.size >> PAGE_SHIFT, VM_MAP, prot);
}
static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op)