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drm/udl: add cache flags definitions for udl_gem_object

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By default set udl_gem_object as cacheable, but set WC flag when attaching
dmabuf. In udl_gem_mmap() update cache attributes based on the flags, similar
to exynos_drm_gem_mmap().

Signed-off-by: Haixia Shi <hshi@chromium.org>
Reviewed-by: Sonny Rao <sonnyrao@chromium.org>
Reviewed-by: Olof Johansson <olofj@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Haixia Shi 2014-11-12 18:33:52 -08:00 committed by Dave Airlie
parent a7ca52e108
commit 09a58da052
2 changed files with 25 additions and 0 deletions
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4
drivers/gpu/drm/udl/udl_drv.h
View File

@ -25,6 +25,9 @@
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 1
#define UDL_BO_CACHEABLE (1 << 0)
#define UDL_BO_WC (1 << 1)
struct udl_device;
struct urb_node {
@ -69,6 +72,7 @@ struct udl_gem_object {
struct page **pages;
void *vmapping;
struct sg_table *sg;
unsigned int flags;
};
#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)

21
drivers/gpu/drm/udl/udl_gem.c
View File

@ -25,6 +25,7 @@ struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
return NULL;
}
obj->flags = UDL_BO_CACHEABLE;
return obj;
}
@ -56,6 +57,23 @@ udl_gem_create(struct drm_file *file,
return 0;
}
static void update_vm_cache_attr(struct udl_gem_object *obj,
struct vm_area_struct *vma)
{
DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags);
/* non-cacheable as default. */
if (obj->flags & UDL_BO_CACHEABLE) {
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
} else if (obj->flags & UDL_BO_WC) {
vma->vm_page_prot =
pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
} else {
vma->vm_page_prot =
pgprot_noncached(vm_get_page_prot(vma->vm_flags));
}
}
int udl_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
@ -77,6 +95,8 @@ int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
vma->vm_flags &= ~VM_PFNMAP;
vma->vm_flags |= VM_MIXEDMAP;
update_vm_cache_attr(to_udl_bo(vma->vm_private_data), vma);
return ret;
}
@ -279,6 +299,7 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
}
uobj->base.import_attach = attach;
uobj->flags = UDL_BO_WC;
return &uobj->base;