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drm/etnaviv: implement dma-buf mmap

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This adds the required boilerplate to allow direct mmap of exported
etnaviv BOs.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Lucas Stach 2016-11-18 15:15:16 +01:00
parent a909d3e636
commit 5688e57eb5
3 changed files with 16 additions and 0 deletions
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1
drivers/gpu/drm/etnaviv/etnaviv_drv.c
View file

@ -505,6 +505,7 @@ static struct drm_driver etnaviv_drm_driver = {
.gem_prime_import_sg_table = etnaviv_gem_prime_import_sg_table,
.gem_prime_vmap = etnaviv_gem_prime_vmap,
.gem_prime_vunmap = etnaviv_gem_prime_vunmap,
.gem_prime_mmap = etnaviv_gem_prime_mmap,
#ifdef CONFIG_DEBUG_FS
.debugfs_init = etnaviv_debugfs_init,
.debugfs_cleanup = etnaviv_debugfs_cleanup,

2
drivers/gpu/drm/etnaviv/etnaviv_drv.h
View file

@ -78,6 +78,8 @@ int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset);
struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj);
void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj);
void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma);
struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach, struct sg_table *sg);
int etnaviv_gem_prime_pin(struct drm_gem_object *obj);

13
drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
View file

@ -39,6 +39,19 @@ void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
/* TODO msm_gem_vunmap() */
}
int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma)
{
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
int ret;
ret = drm_gem_mmap_obj(obj, obj->size, vma);
if (ret < 0)
return ret;
return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
}
int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
{
if (!obj->import_attach) {