mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 03:06:16 +09:00
c0a5a81f74
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>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/* 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 <common.h>
|
|
#include <asm/cache.h>
|
|
#include <cpu_func.h>
|
|
#include <linux/dma-direction.h>
|
|
#include <malloc.h>
|
|
|
|
#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)
|
|
{
|
|
unsigned long addr = (unsigned long)vaddr;
|
|
|
|
len = ALIGN(len, ARCH_DMA_MINALIGN);
|
|
|
|
if (dir == DMA_FROM_DEVICE)
|
|
invalidate_dcache_range(addr, addr + len);
|
|
else
|
|
flush_dcache_range(addr, addr + len);
|
|
|
|
return addr;
|
|
}
|
|
|
|
static inline void dma_unmap_single(volatile void *vaddr, size_t len,
|
|
enum dma_data_direction dir)
|
|
{
|
|
unsigned long addr = (unsigned long)vaddr;
|
|
|
|
len = ALIGN(len, ARCH_DMA_MINALIGN);
|
|
|
|
if (dir != DMA_TO_DEVICE)
|
|
invalidate_dcache_range(addr, addr + len);
|
|
}
|
|
|
|
#endif /* __ASM_X86_DMA_MAPPING_H */
|