Release 4.16 arch/mips/loongson64/common/dma-swiotlb.c
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/swiotlb.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <boot_param.h>
#include <dma-coherence.h>
static void *loongson_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs);
mb();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 42 | 85.71% | 1 | 33.33% |
| Christoph Hellwig | 5 | 10.20% | 1 | 33.33% |
| Krzysztof Kozlowski | 2 | 4.08% | 1 | 33.33% |
| Total | 49 | 100.00% | 3 | 100.00% |
static dma_addr_t loongson_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 daddr = swiotlb_map_page(dev, page, offset, size,
dir, attrs);
mb();
return daddr;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 53 | 96.36% | 1 | 50.00% |
| Krzysztof Kozlowski | 2 | 3.64% | 1 | 50.00% |
| Total | 55 | 100.00% | 2 | 100.00% |
static int loongson_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
unsigned long attrs)
{
int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, attrs);
mb();
return r;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 46 | 93.88% | 1 | 33.33% |
| Krzysztof Kozlowski | 2 | 4.08% | 1 | 33.33% |
| Alexander Duyck | 1 | 2.04% | 1 | 33.33% |
| Total | 49 | 100.00% | 3 | 100.00% |
static void loongson_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir)
{
swiotlb_sync_single_for_device(dev, dma_handle, size, dir);
mb();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
static void loongson_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
swiotlb_sync_sg_for_device(dev, sg, nents, dir);
mb();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
static int loongson_dma_supported(struct device *dev, u64 mask)
{
if (mask > DMA_BIT_MASK(loongson_sysconf.dma_mask_bits))
return 0;
return swiotlb_dma_supported(dev, mask);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 29 | 80.56% | 1 | 50.00% |
| Christoph Hellwig | 7 | 19.44% | 1 | 50.00% |
| Total | 36 | 100.00% | 2 | 100.00% |
dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
long nid;
#ifdef CONFIG_PHYS48_TO_HT40
/* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
* Loongson-3's 48bit address space and embed it into 40bit */
nid = (paddr >> 44) & 0x3;
paddr = ((nid << 44) ^ paddr) | (nid << 37);
#endif
return paddr;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 53 | 100.00% | 2 | 100.00% |
| Total | 53 | 100.00% | 2 | 100.00% |
phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
long nid;
#ifdef CONFIG_PHYS48_TO_HT40
/* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
* Loongson-3's 48bit address space and embed it into 40bit */
nid = (daddr >> 37) & 0x3;
daddr = ((nid << 37) ^ daddr) | (nid << 44);
#endif
return daddr;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 53 | 100.00% | 2 | 100.00% |
| Total | 53 | 100.00% | 2 | 100.00% |
static const struct dma_map_ops loongson_dma_map_ops = {
.alloc = loongson_dma_alloc_coherent,
.free = swiotlb_free,
.map_page = loongson_dma_map_page,
.unmap_page = swiotlb_unmap_page,
.map_sg = loongson_dma_map_sg,
.unmap_sg = swiotlb_unmap_sg_attrs,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = loongson_dma_sync_single_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = loongson_dma_sync_sg_for_device,
.mapping_error = swiotlb_dma_mapping_error,
.dma_supported = loongson_dma_supported,
};
void __init plat_swiotlb_setup(void)
{
swiotlb_init(1);
mips_dma_map_ops = &loongson_dma_map_ops;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huacai Chen | 457 | 95.01% | 2 | 25.00% |
| Christoph Hellwig | 15 | 3.12% | 2 | 25.00% |
| Krzysztof Kozlowski | 6 | 1.25% | 1 | 12.50% |
| Alexander Duyck | 1 | 0.21% | 1 | 12.50% |
| Bart Van Assche | 1 | 0.21% | 1 | 12.50% |
| Greg Kroah-Hartman | 1 | 0.21% | 1 | 12.50% |
| Total | 481 | 100.00% | 8 | 100.00% |
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