Release 4.14 arch/m68k/kernel/dma.c
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#undef DEBUG
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/export.h>
#include <asm/pgalloc.h>
#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
static void *m68k_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
gfp_t flag, unsigned long attrs)
{
struct page *page, **map;
pgprot_t pgprot;
void *addr;
int i, order;
pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
size = PAGE_ALIGN(size);
order = get_order(size);
page = alloc_pages(flag, order);
if (!page)
return NULL;
*handle = page_to_phys(page);
map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
if (!map) {
__free_pages(page, order);
return NULL;
}
split_page(page, order);
order = 1 << order;
size >>= PAGE_SHIFT;
map[0] = page;
for (i = 1; i < size; i++)
map[i] = page + i;
for (; i < order; i++)
__free_page(page + i);
pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
if (CPU_IS_040_OR_060)
pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
else
pgprot_val(pgprot) |= _PAGE_NOCACHE030;
addr = vmap(map, size, VM_MAP, pgprot);
kfree(map);
return addr;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 241 | 97.57% | 1 | 33.33% |
Christoph Hellwig | 4 | 1.62% | 1 | 33.33% |
Krzysztof Kozlowski | 2 | 0.81% | 1 | 33.33% |
Total | 247 | 100.00% | 3 | 100.00% |
static void m68k_dma_free(struct device *dev, size_t size, void *addr,
dma_addr_t handle, unsigned long attrs)
{
pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
vfree(addr);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 33 | 84.62% | 1 | 33.33% |
Christoph Hellwig | 4 | 10.26% | 1 | 33.33% |
Krzysztof Kozlowski | 2 | 5.13% | 1 | 33.33% |
Total | 39 | 100.00% | 3 | 100.00% |
#else
#include <asm/cacheflush.h>
static void *m68k_dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret;
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
if (dev == NULL || (*dev->dma_mask < 0xffffffff))
gfp |= GFP_DMA;
ret = (void *)__get_free_pages(gfp, get_order(size));
if (ret != NULL) {
memset(ret, 0, size);
*dma_handle = virt_to_phys(ret);
}
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 97 | 94.17% | 1 | 33.33% |
Christoph Hellwig | 4 | 3.88% | 1 | 33.33% |
Krzysztof Kozlowski | 2 | 1.94% | 1 | 33.33% |
Total | 103 | 100.00% | 3 | 100.00% |
static void m68k_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, unsigned long attrs)
{
free_pages((unsigned long)vaddr, get_order(size));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 33 | 84.62% | 1 | 33.33% |
Christoph Hellwig | 4 | 10.26% | 1 | 33.33% |
Krzysztof Kozlowski | 2 | 5.13% | 1 | 33.33% |
Total | 39 | 100.00% | 3 | 100.00% |
#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
static void m68k_dma_sync_single_for_device(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
switch (dir) {
case DMA_BIDIRECTIONAL:
case DMA_TO_DEVICE:
cache_push(handle, size);
break;
case DMA_FROM_DEVICE:
cache_clear(handle, size);
break;
default:
pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
dir);
break;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 58 | 95.08% | 2 | 50.00% |
Christoph Hellwig | 2 | 3.28% | 1 | 25.00% |
Geert Uytterhoeven | 1 | 1.64% | 1 | 25.00% |
Total | 61 | 100.00% | 4 | 100.00% |
static void m68k_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sglist, int nents, enum dma_data_direction dir)
{
int i;
struct scatterlist *sg;
for_each_sg(sglist, sg, nents, i) {
dma_sync_single_for_device(dev, sg->dma_address, sg->length,
dir);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 39 | 67.24% | 1 | 33.33% |
Akinobu Mita | 17 | 29.31% | 1 | 33.33% |
Christoph Hellwig | 2 | 3.45% | 1 | 33.33% |
Total | 58 | 100.00% | 3 | 100.00% |
static dma_addr_t m68k_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 = page_to_phys(page) + offset;
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
dma_sync_single_for_device(dev, handle, size, dir);
return handle;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 49 | 76.56% | 1 | 25.00% |
Alexander Duyck | 9 | 14.06% | 1 | 25.00% |
Christoph Hellwig | 4 | 6.25% | 1 | 25.00% |
Krzysztof Kozlowski | 2 | 3.12% | 1 | 25.00% |
Total | 64 | 100.00% | 4 | 100.00% |
static int m68k_dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
int i;
struct scatterlist *sg;
for_each_sg(sglist, sg, nents, i) {
sg->dma_address = sg_phys(sg);
if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
continue;
dma_sync_single_for_device(dev, sg->dma_address, sg->length,
dir);
}
return nents;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 53 | 65.43% | 1 | 20.00% |
Akinobu Mita | 15 | 18.52% | 1 | 20.00% |
Alexander Duyck | 7 | 8.64% | 1 | 20.00% |
Christoph Hellwig | 4 | 4.94% | 1 | 20.00% |
Krzysztof Kozlowski | 2 | 2.47% | 1 | 20.00% |
Total | 81 | 100.00% | 5 | 100.00% |
const struct dma_map_ops m68k_dma_ops = {
.alloc = m68k_dma_alloc,
.free = m68k_dma_free,
.map_page = m68k_dma_map_page,
.map_sg = m68k_dma_map_sg,
.sync_single_for_device = m68k_dma_sync_single_for_device,
.sync_sg_for_device = m68k_dma_sync_sg_for_device,
};
EXPORT_SYMBOL(m68k_dma_ops);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Greg Ungerer | 653 | 83.50% | 4 | 36.36% |
Christoph Hellwig | 65 | 8.31% | 1 | 9.09% |
Akinobu Mita | 32 | 4.09% | 1 | 9.09% |
Alexander Duyck | 16 | 2.05% | 1 | 9.09% |
Krzysztof Kozlowski | 12 | 1.53% | 1 | 9.09% |
Roman Zippel | 2 | 0.26% | 1 | 9.09% |
Geert Uytterhoeven | 1 | 0.13% | 1 | 9.09% |
Bart Van Assche | 1 | 0.13% | 1 | 9.09% |
Total | 782 | 100.00% | 11 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.