u-boot/arch/arm/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_ARM_DMA_MAPPING_H
#define __ASM_ARM_DMA_MAPPING_H

#include <asm/cache.h>
#include <cpu_func.h>
#include <linux/dma-direction.h>
#include <linux/kernel.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, ROUND(len, ARCH_DMA_MINALIGN));
	return (void *)*handle;
}

static inline void dma_free_coherent(void *addr)
{
	free(addr);
}

#endif /* __ASM_ARM_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+ */`
AT91CAP9 support : include/ files Signed-off-by: Stelian Pop <stelian@popies.net> 2008-01-31 21:15:53 +00:00			`/*`
			`* (C) Copyright 2007`
Fix Stelian's email address Change my old email address which is no longer valid. Signed-off-by: Stelian Pop <stelian@popies.net> Signed-off-by: Anatolij Gustschin <agust@denx.de> 2011-10-31 23:00:39 +00:00			`* Stelian Pop <stelian@popies.net>`
AT91CAP9 support : include/ files Signed-off-by: Stelian Pop <stelian@popies.net> 2008-01-31 21:15:53 +00:00			`* Lead Tech Design <www.leadtechdesign.com>`
			`*/`
			`#ifndef __ASM_ARM_DMA_MAPPING_H`
			`#define __ASM_ARM_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>`
arm: Don't include common.h in header files It is bad practice to include common.h in other header files since it can bring in any number of superfluous definitions. It implies that some C files don't include it and thus may be missing CONFIG options that are set up by that file. The C files should include these themselves. Update some header files in arch/arm to drop this. Signed-off-by: Simon Glass <sjg@chromium.org> 2020-05-10 17:39:55 +00:00			`#include <linux/kernel.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>`
arm: asm: dma-mapping: added dma_free_coherent API Added dma_free_coherent corresponding to the dma_alloc_coherent in dma-mapping.h in order to free memory allocated using dma_alloc_coherent. This API is used in dwc3 driver. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com> 2015-02-23 13:09:56 +00:00
include: asm: dma-mapping: get rid of the compilation warning in udc-core Fixed the following warning here. "warning: ‘dma_alloc_coherent’ defined but not used" while compiling udc-core Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com> 2015-02-23 13:09:49 +00:00			`static inline void dma_alloc_coherent(size_t len, unsigned long handle)`
AT91CAP9 support : include/ files Signed-off-by: Stelian Pop <stelian@popies.net> 2008-01-31 21:15:53 +00:00			`{`
arm: Round the dma_alloc_coherent memory size to cache line aligned When running usb dwc3 gadget driver, we meet random USB enumeration failure in fastboot. The root cause is a cache coherence issue. When it happens, the ctrl_req in gadget driver is allocated at 0xfe932f40, and the usb_composite_dev (cdev) is allocated at 0xfe932f60. So after we submit the setup request (cache flushed) to USB controller, any accessing to usb_composite_dev variable will cause the cache line refill, then when setup transfer is completed, reading the setup data in ctrl_req will gets old value from cache not from memory. The ctrl_req is allocated by API dma_alloc_coherent, but u-boot don't have cohernet memory. so it still needs cache maintain operations before/after HW accessing. Since the cache flush or invalidate bases on cache line, so when the allocated memory size is not cache line aligned, potentially it may meet such issue. This patch modifies the dma_alloc_coherent API to round the size to cache line aligned. Signed-off-by: Ye Li <ye.li@nxp.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> 2019-01-04 09:24:14 +00:00			`*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, ROUND(len, ARCH_DMA_MINALIGN));`
AT91CAP9 support : include/ files Signed-off-by: Stelian Pop <stelian@popies.net> 2008-01-31 21:15:53 +00:00			`return (void )handle;`
			`}`

arm: asm: dma-mapping: added dma_free_coherent API Added dma_free_coherent corresponding to the dma_alloc_coherent in dma-mapping.h in order to free memory allocated using dma_alloc_coherent. This API is used in dwc3 driver. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com> 2015-02-23 13:09:56 +00:00			`static inline void dma_free_coherent(void *addr)`
			`{`
			`free(addr);`
			`}`

AT91CAP9 support : include/ files Signed-off-by: Stelian Pop <stelian@popies.net> 2008-01-31 21:15:53 +00:00			`#endif /* __ASM_ARM_DMA_MAPPING_H */`