drm/tegra: Add SET/GET_TILING IOCTLs

These IOCTLs can be used to set the tiling mode of a buffer object after
it has been allocated or imported.

Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 95 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index fd736efd14b..5dca20982f3 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -455,6 +455,99 @@ static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 
 	return 0;
 }
+
+static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
+				struct drm_file *file)
+{
+	struct drm_tegra_gem_set_tiling *args = data;
+	enum tegra_bo_tiling_mode mode;
+	struct drm_gem_object *gem;
+	unsigned long value = 0;
+	struct tegra_bo *bo;
+
+	switch (args->mode) {
+	case DRM_TEGRA_GEM_TILING_MODE_PITCH:
+		mode = TEGRA_BO_TILING_MODE_PITCH;
+
+		if (args->value != 0)
+			return -EINVAL;
+
+		break;
+
+	case DRM_TEGRA_GEM_TILING_MODE_TILED:
+		mode = TEGRA_BO_TILING_MODE_TILED;
+
+		if (args->value != 0)
+			return -EINVAL;
+
+		break;
+
+	case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
+		mode = TEGRA_BO_TILING_MODE_BLOCK;
+
+		if (args->value > 5)
+			return -EINVAL;
+
+		value = args->value;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	gem = drm_gem_object_lookup(drm, file, args->handle);
+	if (!gem)
+		return -EINVAL;
+
+	bo = to_tegra_bo(gem);
+
+	bo->tiling.mode = mode;
+	bo->tiling.value = value;
+
+	drm_gem_object_unreference(gem);
+
+	return 0;
+}
+
+static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
+				struct drm_file *file)
+{
+	struct drm_tegra_gem_get_tiling *args = data;
+	struct drm_gem_object *gem;
+	struct tegra_bo *bo;
+	int err = 0;
+
+	gem = drm_gem_object_lookup(drm, file, args->handle);
+	if (!gem)
+		return -EINVAL;
+
+	bo = to_tegra_bo(gem);
+
+	switch (bo->tiling.mode) {
+	case TEGRA_BO_TILING_MODE_PITCH:
+		args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
+		args->value = 0;
+		break;
+
+	case TEGRA_BO_TILING_MODE_TILED:
+		args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
+		args->value = 0;
+		break;
+
+	case TEGRA_BO_TILING_MODE_BLOCK:
+		args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
+		args->value = bo->tiling.value;
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	}
+
+	drm_gem_object_unreference(gem);
+
+	return err;
+}
 #endif
 
 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
@@ -469,6 +562,8 @@ static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
 	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),
 #endif
 };