xref: /src/sys/external/bsd/drm2/dist/drm/ast/ast_ttm.c

/*	$NetBSD: ast_ttm.c,v 1.3 2021/12/18 23:45:27 riastradh Exp $	*/

/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */
/*
 * Authors: Dave Airlie <airlied (at) redhat.com>
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ast_ttm.c,v 1.3 2021/12/18 23:45:27 riastradh Exp $");

#include <linux/pci.h>

#include <drm/drm_print.h>
#include <drm/drm_gem_vram_helper.h>

#include "ast_drv.h"

int ast_mm_init(struct ast_private *ast)
{
	struct drm_vram_mm *vmm;
	int ret;
	struct drm_device *dev = ast->dev;

	vmm = drm_vram_helper_alloc_mm(
		dev, pci_resource_start(dev->pdev, 0),
		ast->vram_size);
	if (IS_ERR(vmm)) {
		ret = PTR_ERR(vmm);
		DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
		return ret;
	}

	arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
				   pci_resource_len(dev->pdev, 0));
	ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
					pci_resource_len(dev->pdev, 0));

	return 0;
}

void ast_mm_fini(struct ast_private *ast)
{
	struct drm_device *dev = ast->dev;

	drm_vram_helper_release_mm(dev);

	arch_phys_wc_del(ast->fb_mtrr);
	arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
				pci_resource_len(dev->pdev, 0));
}