[PATCH 3/4] drm/tegra: Add SET/GET_FLAGS IOCTLs

Thierry Reding
2014-06-10T11:04:53Z

From: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>

The DRM_TEGRA_GEM_SET_FLAGS IOCTL can be used to set the flags of a
buffer object after it has been allocated or imported. Flags associated
with a buffer object can be queried using the DRM_TEGRA_GEM_GET_FLAGS
IOCTL.

Signed-off-by: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
drivers/gpu/drm/tegra/drm.c | 48 ++++++++++++++++++++++++++++++++++++++++++++
include/uapi/drm/tegra_drm.h | 21 +++++++++++++++++++
2 files changed, 69 insertions(+)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 5dca20982f3b..f292c29ef62f 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -548,6 +548,52 @@ static int tegra_gem_get_tiling(struct drm_device *drm, void *data,

return err;
}
+
+static int tegra_gem_set_flags(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_gem_set_flags *args = data;
+ struct drm_tegra_bo *bo;
+ unsigned long flags = 0;
+
+ if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
+ return -EINVAL;
+
+ gem = drm_gem_object_lookup(drm, file, args->handle);
+ if (!gem)
+ return -EINVAL;
+
+ bo = to_tegra_bo(gem);
+ bo->flags = 0;
+
+ if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
+ bo->flags |= TEGRA_BO_BOTTOM_UP;
+
+ drm_gem_object_unreference(gem);
+
+ return 0;
+}
+
+static int tegra_gem_get_flags(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_gem_get_flags *args = data;
+ struct drm_tegra_bo *bo;
+
+ gem = drm_gem_object_lookup(drm, file, args->handle);
+ if (!gem)
+ return -EINVAL;
+
+ bo = to_tegra_bo(gem);
+ args->flags = 0;
+
+ if (bo->flags & TEGRA_BO_BOTTOM_UP)
+ args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
+
+ drm_gem_object_unreference(gem);
+
+ return 0;
+}
#endif

static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
@@ -564,6 +610,8 @@ static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
#endif
};

diff --git a/include/uapi/drm/tegra_drm.h b/include/uapi/drm/tegra_drm.h
index 0829f75eb986..c15d781ecc0f 100644
--- a/include/uapi/drm/tegra_drm.h
+++ b/include/uapi/drm/tegra_drm.h
@@ -150,6 +150,23 @@ struct drm_tegra_gem_get_tiling {
__u32 pad;
};

+#define DRM_TEGRA_GEM_BOTTOM_UP (1 << 0)
+#define DRM_TEGRA_GEM_FLAGS (DRM_TEGRA_GEM_BOTTOM_UP)
+
+struct drm_tegra_gem_set_flags {
+ /* input */
+ __u32 handle;
+ /* output */
+ __u32 flags;
+};
+
+struct drm_tegra_gem_get_flags {
+ /* input */
+ __u32 handle;
+ /* output */
+ __u32 flags;
+};
+
#define DRM_TEGRA_GEM_CREATE 0x00
#define DRM_TEGRA_GEM_MMAP 0x01
#define DRM_TEGRA_SYNCPT_READ 0x02
@@ -162,6 +179,8 @@ struct drm_tegra_gem_get_tiling {
#define DRM_TEGRA_GET_SYNCPT_BASE 0x09
#define DRM_TEGRA_GEM_SET_TILING 0x0a
#define DRM_TEGRA_GEM_GET_TILING 0x0b
+#define DRM_TEGRA_GEM_SET_FLAGS 0x0c
+#define DRM_TEGRA_GEM_GET_FLAGS 0x0d

#define DRM_IOCTL_TEGRA_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_CREATE, struct drm_tegra_gem_create)
#define DRM_IOCTL_TEGRA_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_MMAP, struct drm_tegra_gem_mmap)
@@ -175,5 +194,7 @@ struct drm_tegra_gem_get_tiling {
#define DRM_IOCTL_TEGRA_GET_SYNCPT_BASE DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GET_SYNCPT_BASE, struct drm_tegra_get_syncpt_base)
#define DRM_IOCTL_TEGRA_GEM_SET_TILING DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_SET_TILING, struct drm_tegra_gem_set_tiling)
#define DRM_IOCTL_TEGRA_GEM_GET_TILING DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_GET_TILING, struct drm_tegra_gem_get_tiling)
+#define DRM_IOCTL_TEGRA_GEM_SET_FLAGS DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_SET_FLAGS, struct drm_tegra_gem_set_flags)
+#define DRM_IOCTL_TEGRA_GEM_GET_FLAGS DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_GET_FLAGS, struct drm_tegra_gem_get_flags)

#endif
--
1.9.2