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Commit 7d7b7adf authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
Browse files

gma500: allow the creation of 'stolen' memory objects 



For things like cursors and many kinds of framebuffer set up we are actually
best using the stolen memory when possible.

Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 7dfe43c5

drivers/staging/gma500/gem.c

+24 −0
Original line number Diff line number Diff line
@@ -251,6 +251,21 @@ int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 
	}

}



static int psb_gem_create_stolen(struct drm_file *file, struct drm_device *dev,

						int size, u32 *handle)

{

	struct gtt_range *gtt = psb_gtt_alloc_range(dev, size, "gem", 1);

	if (gtt == NULL)

		return -ENOMEM;

	if (drm_gem_private_object_init(dev, &gtt->gem, size) != 0)

		goto free_gtt;

	if (drm_gem_handle_create(file, &gtt->gem, handle) == 0)

		return 0;

free_gtt:

	psb_gtt_free_range(dev, gtt);

	return -ENOMEM;

}



/*

 *	GEM interfaces for our specific client

 */
@@ -258,6 +273,15 @@ int psb_gem_create_ioctl(struct drm_device *dev, void *data, 
					struct drm_file *file)

{

	struct drm_psb_gem_create *args = data;

	int ret;

	if (args->flags & PSB_GEM_CREATE_STOLEN) {

		ret = psb_gem_create_stolen(file, dev, args->size,

							&args->handle);

		if (ret == 0)

			return 0;

		/* Fall throguh */

		args->flags &= ~PSB_GEM_CREATE_STOLEN;

	}

	return psb_gem_create(file, dev, args->size, &args->handle);

}

drivers/staging/gma500/psb_drm.h

+2 −1
Original line number Diff line number Diff line
@@ -189,7 +189,8 @@ struct psb_drm_dpu_rect { 
struct drm_psb_gem_create {

	__u64 size;

	__u32 handle;

	__u32 pad;

	__u32 flags;

#define PSB_GEM_CREATE_STOLEN		1	/* Stolen memory can be used */

};



#define PSB_2D_OP_BUFLEN		16