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Commit 5a125c3c authored by Eric Anholt's avatar Eric Anholt Committed by Dave Airlie
Browse files

i915: Add GEM ioctl to get available aperture size. 



This will let userland know when to submit its batchbuffers, before they get
too big to fit in the aperture.

Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 4e270e9b

drivers/gpu/drm/i915/i915_dma.c

+1 −0
Original line number Diff line number Diff line
@@ -960,6 +960,7 @@ struct drm_ioctl_desc i915_ioctls[] = { 
	DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),

	DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),

	DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),

	DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),

};



int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);

drivers/gpu/drm/i915/i915_drv.h

+2 −0
Original line number Diff line number Diff line
@@ -502,6 +502,8 @@ int i915_gem_set_tiling(struct drm_device *dev, void *data, 
			struct drm_file *file_priv);

int i915_gem_get_tiling(struct drm_device *dev, void *data,

			struct drm_file *file_priv);

int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,

				struct drm_file *file_priv);

void i915_gem_load(struct drm_device *dev);

int i915_gem_proc_init(struct drm_minor *minor);

void i915_gem_proc_cleanup(struct drm_minor *minor);

drivers/gpu/drm/i915/i915_gem.c

+22 −0
Original line number Diff line number Diff line
@@ -79,6 +79,28 @@ i915_gem_init_ioctl(struct drm_device *dev, void *data, 
	return 0;

}



int

i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,

			    struct drm_file *file_priv)

{

	drm_i915_private_t *dev_priv = dev->dev_private;

	struct drm_i915_gem_get_aperture *args = data;

	struct drm_i915_gem_object *obj_priv;



	if (!(dev->driver->driver_features & DRIVER_GEM))

		return -ENODEV;



	args->aper_size = dev->gtt_total;

	args->aper_available_size = args->aper_size;



	list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {

		if (obj_priv->pin_count > 0)

			args->aper_available_size -= obj_priv->obj->size;

	}



	return 0;

}





/**

 * Creates a new mm object and returns a handle to it.

include/drm/i915_drm.h

+13 −0
Original line number Diff line number Diff line
@@ -159,6 +159,7 @@ typedef struct _drm_i915_sarea { 
#define DRM_I915_GEM_SW_FINISH	0x20

#define DRM_I915_GEM_SET_TILING	0x21

#define DRM_I915_GEM_GET_TILING	0x22

#define DRM_I915_GEM_GET_APERTURE 0x23



#define DRM_IOCTL_I915_INIT		DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)

#define DRM_IOCTL_I915_FLUSH		DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
@@ -190,6 +191,7 @@ typedef struct _drm_i915_sarea { 
#define DRM_IOCTL_I915_GEM_SW_FINISH	DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_SW_FINISH, struct drm_i915_gem_sw_finish)

#define DRM_IOCTL_I915_GEM_SET_TILING	DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_SET_TILING, struct drm_i915_gem_set_tiling)

#define DRM_IOCTL_I915_GEM_GET_TILING	DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_GET_TILING, struct drm_i915_gem_get_tiling)

#define DRM_IOCTL_I915_GEM_GET_APERTURE	DRM_IOR  (DRM_COMMAND_BASE + DRM_I915_GEM_GET_APERTURE, struct drm_i915_gem_get_aperture)



/* Allow drivers to submit batchbuffers directly to hardware, relying

 * on the security mechanisms provided by hardware.
@@ -600,4 +602,15 @@ struct drm_i915_gem_get_tiling { 
	uint32_t swizzle_mode;

};



struct drm_i915_gem_get_aperture {

	/** Total size of the aperture used by i915_gem_execbuffer, in bytes */

	uint64_t aper_size;



	/**

	 * Available space in the aperture used by i915_gem_execbuffer, in

	 * bytes

	 */

	uint64_t aper_available_size;

};



#endif				/* _I915_DRM_H_ */