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SFP:1102; SCL:1; SRVR:BYAPR04MB4405; H:BYAPR04MB5303.namprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: W/1HApmXw5H7XVCUHAkir0HPGv9VvcMHJPSRryn7HkyOr/oEITJ/6V5kluT2a/fsOKiN/rWKmWcOJNUrN65LbZG5EKmriYH7OdrTAx6z6e3xfFNLGb6BuIQpq+eO0rA+/p113jIfDMC035Q6/ZiGCcITDCxXcLUMPJzHH3jW7yj3tmOTnOwk0OssZYifrDLk2tzVmea6DVp1v239IspYFR5I78F4w0Ajg+eozteiDxZmCJ6ZneSmSnBr+VkShzscQQPxwCQlUHr0sF1jc3ZZW56/BEWPnPavGvUvHNp9XuWc74Mh+URkEQczoi0q9RVjcpsJxNTGfCzfmTntFEGIYisY77vFAa03xGbnPxhmrkF/3wke7ZZolUoqSChMd613VlaVmHWaz4BemIpXTPGYoNIGukXa1NZOrNC0chzskdE= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: d89a0e46-4da2-4405-cd66-08d68152ad01 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Jan 2019 16:48:57.0631 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB4405 Cc: Palmer Dabbelt , U-Boot Mailing List , Alexander Graf , Christoph Hellwig , Paul Walmsley Subject: [U-Boot] [PATCH v4 04/15] riscv: Add asm/dma-mapping.h for DMA mappings X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" 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 */