[PATCH] drm/etnaviv: implement dma-buf mmap

[Lucas Stach]

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

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
Tested-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_drv.c       |  1 +
 drivers/gpu/drm/etnaviv/etnaviv_drv.h       |  2 ++
 drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 13 +++++++++++++
 3 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c 
b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index aa687669e22b..38720adfc62f 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -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,
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h 
b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
index 65e057639653..c255eda40526 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -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);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c 
b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
index b93618c1aa69..7e8fdb1859dd 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -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) {
-- 
2.10.2