Release 4.7 arch/cris/arch-v32/drivers/pci/dma.c
/*
* Dynamic DMA mapping support.
*
* On cris there is no hardware dynamic DMA address translation,
* so consistent alloc/free are merely page allocation/freeing.
* The rest of the dynamic DMA mapping interface is implemented
* in asm/pci.h.
*
* Borrowed from i386.
*/
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/pci.h>
#include <linux/gfp.h>
#include <asm/io.h>
static void *v32_dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
{
void *ret;
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
if (dev == NULL || (dev->coherent_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 |
| mikael starvik | mikael starvik | 91 | 88.35% | 1 | 33.33% |
| christoph hellwig | christoph hellwig | 11 | 10.68% | 1 | 33.33% |
| al viro | al viro | 1 | 0.97% | 1 | 33.33% |
| Total | 103 | 100.00% | 3 | 100.00% |
static void v32_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, struct dma_attrs *attrs)
{
free_pages((unsigned long)vaddr, get_order(size));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| mikael starvik | mikael starvik | 26 | 65.00% | 1 | 50.00% |
| christoph hellwig | christoph hellwig | 14 | 35.00% | 1 | 50.00% |
| Total | 40 | 100.00% | 2 | 100.00% |
static inline dma_addr_t v32_dma_map_page(struct device *dev,
struct page *page, unsigned long offset, size_t size,
enum dma_data_direction direction,
struct dma_attrs *attrs)
{
return page_to_phys(page) + offset;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 41 | 100.00% | 1 | 100.00% |
| Total | 41 | 100.00% | 1 | 100.00% |
static inline int v32_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
printk("Map sg\n");
return nents;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 35 | 94.59% | 1 | 50.00% |
| mikael starvik | mikael starvik | 2 | 5.41% | 1 | 50.00% |
| Total | 37 | 100.00% | 2 | 100.00% |
static inline int v32_dma_supported(struct device *dev, u64 mask)
{
/*
* we fall back to GFP_DMA when the mask isn't all 1s,
* so we can't guarantee allocations that must be
* within a tighter range than GFP_DMA..
*/
if (mask < 0x00ffffff)
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 27 | 96.43% | 1 | 50.00% |
| mikael starvik | mikael starvik | 1 | 3.57% | 1 | 50.00% |
| Total | 28 | 100.00% | 2 | 100.00% |
struct dma_map_ops v32_dma_ops = {
.alloc = v32_dma_alloc,
.free = v32_dma_free,
.map_page = v32_dma_map_page,
.map_sg = v32_dma_map_sg,
.dma_supported = v32_dma_supported,
};
EXPORT_SYMBOL(v32_dma_ops);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph hellwig | christoph hellwig | 164 | 53.95% | 1 | 25.00% |
| mikael starvik | mikael starvik | 136 | 44.74% | 1 | 25.00% |
| tejun heo | tejun heo | 3 | 0.99% | 1 | 25.00% |
| al viro | al viro | 1 | 0.33% | 1 | 25.00% |
| Total | 304 | 100.00% | 4 | 100.00% |
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