diff options
| author | John Keeping <john@metanate.com> | 2022-11-10 20:24:14 +0300 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2023-02-05 17:27:54 +0300 |
| commit | 0020d4cfa3eea0e5fad23af49411217da854fc83 (patch) | |
| tree | 7fd0d0d5e97df628a625d088cd144d02606385da | |
| parent | 582212ee1611f77e0360d249f11c0f703ed723dc (diff) | |
| download | linux-0020d4cfa3eea0e5fad23af49411217da854fc83.tar.xz | |
drm/rockchip: avoid duplicate mappings for IOMMU devices
If a buffer is allocated with alloc_kmap, then it is vmap'd on creation
and there is no reason to map it again in rockchip_gem_prime_vmap() when
the existing mapping can be used.
Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20221110172415.2853420-1-john@metanate.com
| -rw-r--r-- | drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 6edb7c52cb3d..c9507d27f0ba 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -519,8 +519,14 @@ int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); if (rk_obj->pages) { - void *vaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, - pgprot_writecombine(PAGE_KERNEL)); + void *vaddr; + + if (rk_obj->kvaddr) + vaddr = rk_obj->kvaddr; + else + vaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + if (!vaddr) return -ENOMEM; iosys_map_set_vaddr(map, vaddr); @@ -540,7 +546,8 @@ void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); if (rk_obj->pages) { - vunmap(map->vaddr); + if (map->vaddr != rk_obj->kvaddr) + vunmap(map->vaddr); return; } |