u-boot/arch/x86/include/asm/dma-mapping.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2007
 * Stelian Pop <stelian@popies.net>
 * Lead Tech Design <www.leadtechdesign.com>
 */
#ifndef __ASM_X86_DMA_MAPPING_H
#define __ASM_X86_DMA_MAPPING_H

#include <asm/cache.h>
#include <cpu_func.h>
#include <linux/dma-direction.h>
#include <linux/types.h>
#include <malloc.h>

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);
}

#endif /* __ASM_X86_DMA_MAPPING_H */
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 21:58:06 +00:00			`/* SPDX-License-Identifier: GPL-2.0+ */`
x86: Add dma-mapping.h to architectural code Some cross-platform drivers rely on this header present. Make it so for x86. It's just a copy'n'paste of arch/arm/include/asm/dma-mapping.h. Suggested-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 2017-07-06 11:41:51 +00:00			`/*`
			`* (C) Copyright 2007`
			`* Stelian Pop <stelian@popies.net>`
			`* Lead Tech Design <www.leadtechdesign.com>`
			`*/`
			`#ifndef __ASM_X86_DMA_MAPPING_H`
			`#define __ASM_X86_DMA_MAPPING_H`

asm: dma-mapping.h: Fix dma mapping functions Subsystems such as USB expect dma_map_single() and dma_unmap_single() to do dcache flush/invalidate operations as required. For example, see see drivers/usb/gadget/udc/udc-core.c::usb_gadget_map_request(). Currently drivers do this locally, (see drivers/usb/dwc3/ep0.c, drivers/mtd/nand/raw/denali.c etc..) Update arch specific dma_map_single() and dma_unmap_single() APIs to do cache flush/invalidate operations, so that drivers need not implement them locally. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Rick Chen <rick@andestech.com> 2020-01-16 08:53:45 +00:00			`#include <asm/cache.h>`
			`#include <cpu_func.h>`
dma: import linux/dma-direction.h to consolidate enum dma_data_direction Import include/linux/dma-direction.h from Linux 4.13-rc7 and delete duplicated definitions of enum dma_data_direction. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 2017-08-25 15:50:17 +00:00			`#include <linux/dma-direction.h>`
dma-mapping: fix the prototype of dma_map_single() Make dma_map_single() return the dma address, and remove the pointless volatile. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> 2020-02-14 07:40:17 +00:00			`#include <linux/types.h>`
asm: dma-mapping.h: Fix dma mapping functions Subsystems such as USB expect dma_map_single() and dma_unmap_single() to do dcache flush/invalidate operations as required. For example, see see drivers/usb/gadget/udc/udc-core.c::usb_gadget_map_request(). Currently drivers do this locally, (see drivers/usb/dwc3/ep0.c, drivers/mtd/nand/raw/denali.c etc..) Update arch specific dma_map_single() and dma_unmap_single() APIs to do cache flush/invalidate operations, so that drivers need not implement them locally. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Rick Chen <rick@andestech.com> 2020-01-16 08:53:45 +00:00			`#include <malloc.h>`
x86: Add dma-mapping.h to architectural code Some cross-platform drivers rely on this header present. Make it so for x86. It's just a copy'n'paste of arch/arm/include/asm/dma-mapping.h. Suggested-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 2017-07-06 11:41:51 +00:00
			`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);`
			`}`

			`#endif /* __ASM_X86_DMA_MAPPING_H */`