Release 4.10 arch/c6x/kernel/dma.c
/*
* Copyright (C) 2011 Texas Instruments Incorporated
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <asm/cacheflush.h>
static void c6x_dma_sync(dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
unsigned long paddr = handle;
BUG_ON(!valid_dma_direction(dir));
switch (dir) {
case DMA_FROM_DEVICE:
L2_cache_block_invalidate(paddr, paddr + size);
break;
case DMA_TO_DEVICE:
L2_cache_block_writeback(paddr, paddr + size);
break;
case DMA_BIDIRECTIONAL:
L2_cache_block_writeback_invalidate(paddr, paddr + size);
break;
default:
break;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 78 | 100.00% | 1 | 100.00% |
| Total | 78 | 100.00% | 1 | 100.00% |
static dma_addr_t c6x_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
dma_addr_t handle = virt_to_phys(page_address(page) + offset);
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
c6x_dma_sync(handle, size, dir);
return handle;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 34 | 52.31% | 1 | 25.00% |
| christoph hellwig | christoph hellwig | 20 | 30.77% | 1 | 25.00% |
| alexander duyck | alexander duyck | 9 | 13.85% | 1 | 25.00% |
| krzysztof kozlowski | krzysztof kozlowski | 2 | 3.08% | 1 | 25.00% |
| Total | 65 | 100.00% | 4 | 100.00% |
static void c6x_dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir, unsigned long attrs)
{
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
c6x_dma_sync(handle, size, dir);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 28 | 65.12% | 1 | 25.00% |
| alexander duyck | alexander duyck | 9 | 20.93% | 1 | 25.00% |
| christoph hellwig | christoph hellwig | 4 | 9.30% | 1 | 25.00% |
| krzysztof kozlowski | krzysztof kozlowski | 2 | 4.65% | 1 | 25.00% |
| Total | 43 | 100.00% | 4 | 100.00% |
static int c6x_dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
struct scatterlist *sg;
int i;
for_each_sg(sglist, sg, nents, i) {
sg->dma_address = sg_phys(sg);
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
c6x_dma_sync(sg->dma_address, sg->length, dir);
}
return nents;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 57 | 70.37% | 1 | 25.00% |
| christoph hellwig | christoph hellwig | 13 | 16.05% | 1 | 25.00% |
| alexander duyck | alexander duyck | 9 | 11.11% | 1 | 25.00% |
| krzysztof kozlowski | krzysztof kozlowski | 2 | 2.47% | 1 | 25.00% |
| Total | 81 | 100.00% | 4 | 100.00% |
static void c6x_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
struct scatterlist *sg;
int i;
if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
return;
for_each_sg(sglist, sg, nents, i)
c6x_dma_sync(sg_dma_address(sg), sg->length, dir);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 52 | 78.79% | 1 | 25.00% |
| alexander duyck | alexander duyck | 7 | 10.61% | 1 | 25.00% |
| christoph hellwig | christoph hellwig | 5 | 7.58% | 1 | 25.00% |
| krzysztof kozlowski | krzysztof kozlowski | 2 | 3.03% | 1 | 25.00% |
| Total | 66 | 100.00% | 4 | 100.00% |
static void c6x_dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
c6x_dma_sync(handle, size, dir);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 28 | 93.33% | 1 | 50.00% |
| christoph hellwig | christoph hellwig | 2 | 6.67% | 1 | 50.00% |
| Total | 30 | 100.00% | 2 | 100.00% |
static void c6x_dma_sync_single_for_device(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
c6x_dma_sync(handle, size, dir);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 28 | 93.33% | 1 | 50.00% |
| christoph hellwig | christoph hellwig | 2 | 6.67% | 1 | 50.00% |
| Total | 30 | 100.00% | 2 | 100.00% |
static void c6x_dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sglist, int nents,
enum dma_data_direction dir)
{
struct scatterlist *sg;
int i;
for_each_sg(sglist, sg, nents, i)
c6x_dma_sync_single_for_cpu(dev, sg_dma_address(sg),
sg->length, dir);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 54 | 94.74% | 1 | 50.00% |
| christoph hellwig | christoph hellwig | 3 | 5.26% | 1 | 50.00% |
| Total | 57 | 100.00% | 2 | 100.00% |
static void c6x_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sglist, int nents,
enum dma_data_direction dir)
{
struct scatterlist *sg;
int i;
for_each_sg(sglist, sg, nents, i)
c6x_dma_sync_single_for_device(dev, sg_dma_address(sg),
sg->length, dir);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 54 | 94.74% | 1 | 50.00% |
| christoph hellwig | christoph hellwig | 3 | 5.26% | 1 | 50.00% |
| Total | 57 | 100.00% | 2 | 100.00% |
struct dma_map_ops c6x_dma_ops = {
.alloc = c6x_dma_alloc,
.free = c6x_dma_free,
.map_page = c6x_dma_map_page,
.unmap_page = c6x_dma_unmap_page,
.map_sg = c6x_dma_map_sg,
.unmap_sg = c6x_dma_unmap_sg,
.sync_single_for_device = c6x_dma_sync_single_for_device,
.sync_single_for_cpu = c6x_dma_sync_single_for_cpu,
.sync_sg_for_device = c6x_dma_sync_sg_for_device,
.sync_sg_for_cpu = c6x_dma_sync_sg_for_cpu,
};
EXPORT_SYMBOL(c6x_dma_ops);
/* Number of entries preallocated for DMA-API debugging */
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
static int __init dma_init(void)
{
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
return 0;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
fs_initcall(dma_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| aurelien jacquiot | aurelien jacquiot | 463 | 75.41% | 1 | 25.00% |
| christoph hellwig | christoph hellwig | 109 | 17.75% | 1 | 25.00% |
| alexander duyck | alexander duyck | 34 | 5.54% | 1 | 25.00% |
| krzysztof kozlowski | krzysztof kozlowski | 8 | 1.30% | 1 | 25.00% |
| Total | 614 | 100.00% | 4 | 100.00% |
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