1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
21c51c429SVladimir Murzin /*
31c51c429SVladimir Murzin * Based on linux/arch/arm/mm/dma-mapping.c
41c51c429SVladimir Murzin *
51c51c429SVladimir Murzin * Copyright (C) 2000-2004 Russell King
61c51c429SVladimir Murzin */
71c51c429SVladimir Murzin
80a0f0d8bSChristoph Hellwig #include <linux/dma-map-ops.h>
91c51c429SVladimir Murzin #include <asm/cachetype.h>
101c51c429SVladimir Murzin #include <asm/cacheflush.h>
111c51c429SVladimir Murzin #include <asm/outercache.h>
121c51c429SVladimir Murzin #include <asm/cp15.h>
131c51c429SVladimir Murzin
141c51c429SVladimir Murzin #include "dma.h"
151c51c429SVladimir Murzin
arch_sync_dma_for_device(phys_addr_t paddr,size_t size,enum dma_data_direction dir)16*31b089bbSChristoph Hellwig void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
171c51c429SVladimir Murzin enum dma_data_direction dir)
181c51c429SVladimir Murzin {
191c51c429SVladimir Murzin dmac_map_area(__va(paddr), size, dir);
201c51c429SVladimir Murzin
211c51c429SVladimir Murzin if (dir == DMA_FROM_DEVICE)
221c51c429SVladimir Murzin outer_inv_range(paddr, paddr + size);
231c51c429SVladimir Murzin else
241c51c429SVladimir Murzin outer_clean_range(paddr, paddr + size);
251c51c429SVladimir Murzin }
261c51c429SVladimir Murzin
arch_sync_dma_for_cpu(phys_addr_t paddr,size_t size,enum dma_data_direction dir)27*31b089bbSChristoph Hellwig void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
281c51c429SVladimir Murzin enum dma_data_direction dir)
291c51c429SVladimir Murzin {
301c51c429SVladimir Murzin if (dir != DMA_TO_DEVICE) {
311c51c429SVladimir Murzin outer_inv_range(paddr, paddr + size);
321c51c429SVladimir Murzin dmac_unmap_area(__va(paddr), size, dir);
331c51c429SVladimir Murzin }
341c51c429SVladimir Murzin }
351c51c429SVladimir Murzin
arch_setup_dma_ops(struct device * dev,u64 dma_base,u64 size,const struct iommu_ops * iommu,bool coherent)361c51c429SVladimir Murzin void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
371c51c429SVladimir Murzin const struct iommu_ops *iommu, bool coherent)
381c51c429SVladimir Murzin {
391c51c429SVladimir Murzin if (IS_ENABLED(CONFIG_CPU_V7M)) {
401c51c429SVladimir Murzin /*
411c51c429SVladimir Murzin * Cache support for v7m is optional, so can be treated as
421c51c429SVladimir Murzin * coherent if no cache has been detected. Note that it is not
431c51c429SVladimir Murzin * enough to check if MPU is in use or not since in absense of
441c51c429SVladimir Murzin * MPU system memory map is used.
451c51c429SVladimir Murzin */
46*31b089bbSChristoph Hellwig dev->dma_coherent = cacheid ? coherent : true;
471c51c429SVladimir Murzin } else {
481c51c429SVladimir Murzin /*
491c51c429SVladimir Murzin * Assume coherent DMA in case MMU/MPU has not been set up.
501c51c429SVladimir Murzin */
51*31b089bbSChristoph Hellwig dev->dma_coherent = (get_cr() & CR_M) ? coherent : true;
521c51c429SVladimir Murzin }
531c51c429SVladimir Murzin }
54