shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 19:08:57 +09:00
Code Issues Packages Projects Releases Wiki Activity

drm/rockchip: drv: add support pre mapping for vop iommu

Browse Source 
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
Change-Id: I24f292f58859ed89a7557322dc9cd15ea4930eee
This commit is contained in:
Sandy Huang
2022-08-03 14:37:57 +08:00
committed by Tao Huang
parent c3db24d09b
commit 0da77f77c0
1 changed files with 13 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpu/drm/rockchip/rockchip_drm_drv.c
View File

@@ -49,6 +49,7 @@ static bool is_support_iommu = false;
#else
static bool is_support_iommu = true;
#endif
static bool iommu_reserve_map;
static struct drm_driver rockchip_drm_driver;
@@ -984,6 +985,7 @@ static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
struct rockchip_drm_private *private = drm_dev->dev_private;
struct iommu_domain_geometry *geometry;
u64 start, end;
int ret = 0;
if (!is_support_iommu)
return 0;
@@ -1004,7 +1006,14 @@ static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
iommu_set_fault_handler(private->domain, rockchip_drm_fault_handler,
drm_dev);
return 0;
if (iommu_reserve_map) {
ret = iommu_map(private->domain, 0, 0, (size_t)SZ_4G,
IOMMU_WRITE | IOMMU_READ | IOMMU_PRIV);
if (ret)
dev_err(drm_dev->dev, "failed to create pre mapping\n");
}
return ret;
}
static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
@@ -1014,6 +1023,8 @@ static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
if (!is_support_iommu)
return;
if (iommu_reserve_map)
iommu_unmap(private->domain, 0, (size_t)SZ_4G);
drm_mm_takedown(&private->mm);
iommu_domain_free(private->domain);
}
@@ -1802,6 +1813,7 @@ static int rockchip_drm_platform_of_probe(struct device *dev)
found = true;
iommu_reserve_map |= of_property_read_bool(iommu, "rockchip,reserve-map");
of_node_put(iommu);
of_node_put(port);
}