From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anup Patel Date: Thu, 21 Feb 2019 04:30:28 +0000 Subject: [U-Boot] [PATCH v9 03/15] riscv: Add asm/dma-mapping.h for DMA mappings In-Reply-To: <20190221042936.13441-1-anup.patel@wdc.com> References: <20190221042936.13441-1-anup.patel@wdc.com> Message-ID: <20190221042936.13441-4-anup.patel@wdc.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de This patch adds asm/dma-mapping.h for Linux-like DMA mappings APIs required by some of the drivers (such as, Cadance MACB Ethernet driver). Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Alexander Graf Reviewed-by: Lukas Auer --- arch/riscv/include/asm/dma-mapping.h | 38 ++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 arch/riscv/include/asm/dma-mapping.h diff --git a/arch/riscv/include/asm/dma-mapping.h b/arch/riscv/include/asm/dma-mapping.h new file mode 100644 index 0000000000..3d930c90ec --- /dev/null +++ b/arch/riscv/include/asm/dma-mapping.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2018 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#ifndef __ASM_RISCV_DMA_MAPPING_H +#define __ASM_RISCV_DMA_MAPPING_H + +#include + +#define dma_mapping_error(x, y) 0 + +static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) +{ + *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); + return (void *)*handle; +} + +static inline void dma_free_coherent(void *addr) +{ + free(addr); +} + +static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, + enum dma_data_direction dir) +{ + return (unsigned long)vaddr; +} + +static inline void dma_unmap_single(volatile void *vaddr, size_t len, + unsigned long paddr) +{ +} + +#endif /* __ASM_RISCV_DMA_MAPPING_H */ -- 2.17.1