xref: /dragonfly/sys/dev/drm/include/linux/pci-dma-compat.h (revision aaf7b518)

/*
 * Copyright (c) 2020 François Tigeot <ftigeot@wolfpond.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _LINUX_PCI_DMA_COMPAT_H
#define _LINUX_PCI_DMA_COMPAT_H

#include <linux/dma-mapping.h>

static inline void *
pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_handle)
{
	/* Our dma_alloc_coherent() implementation does not support a NULL pdev */
	BUG_ON(pdev == NULL);

	return dma_alloc_coherent(&pdev->dev, size, dma_handle, GFP_ATOMIC);
}

static inline void
pci_free_consistent(struct pci_dev *pdev,
		    size_t size, void *vaddr, dma_addr_t dma_handle)
{
	dma_free_coherent(&pdev->dev, size, vaddr, dma_handle);
}

#endif	/* _LINUX_PCI_DMA_COMPAT_H */