From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/arm64/include/asm/dma-mapping.h | 54 ++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 arch/arm64/include/asm/dma-mapping.h (limited to 'arch/arm64/include/asm/dma-mapping.h') diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h new file mode 100644 index 000000000..b7847eb8a --- /dev/null +++ b/arch/arm64/include/asm/dma-mapping.h @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2012 ARM Ltd. + * + * 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, see . + */ +#ifndef __ASM_DMA_MAPPING_H +#define __ASM_DMA_MAPPING_H + +#ifdef __KERNEL__ + +#include +#include + +#include +#include + +extern const struct dma_map_ops dummy_dma_ops; + +static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) +{ + /* + * We expect no ISA devices, and all other DMA masters are expected to + * have someone call arch_setup_dma_ops at device creation time. + */ + return &dummy_dma_ops; +} + +void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, + const struct iommu_ops *iommu, bool coherent); +#define arch_setup_dma_ops arch_setup_dma_ops + +#ifdef CONFIG_IOMMU_DMA +void arch_teardown_dma_ops(struct device *dev); +#define arch_teardown_dma_ops arch_teardown_dma_ops +#endif + +/* do not use this function in a driver */ +static inline bool is_device_dma_coherent(struct device *dev) +{ + return dev->archdata.dma_coherent; +} + +#endif /* __KERNEL__ */ +#endif /* __ASM_DMA_MAPPING_H */ -- cgit v1.2.3