arch/mips/include/asm/mach-brcmstb/dma-coherence.h

/*
 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
 * Copyright (C) 2009 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __ASM_MACH_BRCMSTB_DMA_COHERENCE_H
#define __ASM_MACH_BRCMSTB_DMA_COHERENCE_H

struct device;

#if defined(CONFIG_PCI)

extern dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size);
extern dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page);
extern unsigned long plat_dma_addr_to_phys(struct device *dev,
	dma_addr_t dma_addr);

#else

static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
	size_t size)
{
	return virt_to_phys(addr);
}

static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
	struct page *page)
{
	return page_to_phys(page);
}

static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
	dma_addr_t dma_addr)
{
	return dma_addr;
}

#endif

extern void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
	size_t size, int dir);

static inline int plat_dma_supported(struct device *dev, u64 mask)
{
	/*
	 * we fall back to GFP_DMA when the mask isn't all 1s,
	 * so we can't guarantee allocations that must be
	 * within a tighter range than GFP_DMA..
	 */
	if (mask < DMA_BIT_MASK(24))
		return 0;

	return 1;
}

static inline void plat_extra_sync_for_device(struct device *dev)
{
	return;
}

static inline int plat_dma_mapping_error(struct device *dev,
					 dma_addr_t dma_addr)
{
	return 0;
}

static inline int plat_device_is_coherent(struct device *dev)
{
	return 0;
}

static inline void plat_post_dma_flush(struct device *dev)
{
}

#endif /* __ASM_MACH_BRCMSTB_DMA_COHERENCE_H */