drm/msm: Expose our reservation object when exporting a dmabuf.

Without this, polling on the dma-buf (and presumably other devices
synchronizing against our rendering) would return immediately, even
while the BO was busy.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 87b5695d4034df0e118475617167ee990ccfc490..9d498eb81906220705d85c57260cd4b1f82fa1fc 100644 (file)
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -830,6 +830,7 @@ static struct drm_driver msm_driver = {
        .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
        .gem_prime_export   = drm_gem_prime_export,
        .gem_prime_import   = drm_gem_prime_import,
+       .gem_prime_res_obj  = msm_gem_prime_res_obj,
        .gem_prime_pin      = msm_gem_prime_pin,
        .gem_prime_unpin    = msm_gem_prime_unpin,
        .gem_prime_get_sg_table = msm_gem_prime_get_sg_table,

diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 28b6f9ba50664509bb44fa2b5704d3bcc86a67af..1b26ca626528ab5f4435f689d0a213f0e672aaa5 100644 (file)
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -224,6 +224,7 @@ struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj);
 void *msm_gem_prime_vmap(struct drm_gem_object *obj);
 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
+struct reservation_object *msm_gem_prime_res_obj(struct drm_gem_object *obj);
 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
                struct dma_buf_attachment *attach, struct sg_table *sg);
 int msm_gem_prime_pin(struct drm_gem_object *obj);

diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index 60bb290700cef9c32fc2ca0dd2db229a6a7ffedf..13403c6da6c75012fa5f17f4b0b63075ddf20874 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -70,3 +70,10 @@ void msm_gem_prime_unpin(struct drm_gem_object *obj)
        if (!obj->import_attach)
                msm_gem_put_pages(obj);
 }
+
+struct reservation_object *msm_gem_prime_res_obj(struct drm_gem_object *obj)
+{
+       struct msm_gem_object *msm_obj = to_msm_bo(obj);
+
+       return msm_obj->resv;
+}