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Differential D19845 Diff 56264 sys/compat/linuxkpi/common/include/linux/scatterlist.h

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sys/compat/linuxkpi/common/include/linux/scatterlist.h

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#include <linux/mm.h> #include <linux/mm.h>
struct scatterlist { struct scatterlist {
unsigned long page_link; unsigned long page_link;
#define SG_PAGE_LINK_CHAIN 0x1UL #define SG_PAGE_LINK_CHAIN 0x1UL
#define SG_PAGE_LINK_LAST 0x2UL #define SG_PAGE_LINK_LAST 0x2UL
#define SG_PAGE_LINK_MASK 0x3UL #define SG_PAGE_LINK_MASK 0x3UL
unsigned int offset; unsigned int offset;
unsigned int length; unsigned int length;
hselaskyUnsubmitted
Done
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Did you forget to remove the old "length" field?

hselasky: Did you forget to remove the old "length" field?
tychonAuthorUnsubmitted
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No, the length is used an 'input' parameter. The 'dma_' versions are the 'output'. It appears to be a weird interface.

tychon: No, the length is used an 'input' parameter. The 'dma_' versions are the 'output'. It appears…
dma_addr_t address; dma_addr_t dma_address;
unsigned int dma_length;
}; };
CTASSERT((sizeof(struct scatterlist) & SG_PAGE_LINK_MASK) == 0); CTASSERT((sizeof(struct scatterlist) & SG_PAGE_LINK_MASK) == 0);
struct sg_table { struct sg_table {
struct scatterlist *sgl; struct scatterlist *sgl;
unsigned int nents; unsigned int nents;
unsigned int orig_nents; unsigned int orig_nents;
Show All 17 Lines
#define SG_CHAIN SG_PAGE_LINK_CHAIN #define SG_CHAIN SG_PAGE_LINK_CHAIN
#define SG_END SG_PAGE_LINK_LAST #define SG_END SG_PAGE_LINK_LAST
#define sg_is_chain(sg) ((sg)->page_link & SG_PAGE_LINK_CHAIN) #define sg_is_chain(sg) ((sg)->page_link & SG_PAGE_LINK_CHAIN)
#define sg_is_last(sg) ((sg)->page_link & SG_PAGE_LINK_LAST) #define sg_is_last(sg) ((sg)->page_link & SG_PAGE_LINK_LAST)
#define sg_chain_ptr(sg) \ #define sg_chain_ptr(sg) \
((struct scatterlist *) ((sg)->page_link & ~SG_PAGE_LINK_MASK)) ((struct scatterlist *) ((sg)->page_link & ~SG_PAGE_LINK_MASK))
#define sg_dma_address(sg) (sg)->address #define sg_dma_address(sg) (sg)->dma_address
#define sg_dma_len(sg) (sg)->length #define sg_dma_len(sg) (sg)->dma_length
#define for_each_sg_page(sgl, iter, nents, pgoffset) \ #define for_each_sg_page(sgl, iter, nents, pgoffset) \
for (_sg_iter_init(sgl, iter, nents, pgoffset); \ for (_sg_iter_init(sgl, iter, nents, pgoffset); \
(iter)->sg; _sg_iter_next(iter)) (iter)->sg; _sg_iter_next(iter))
#define for_each_sg(sglist, sg, sgmax, iter) \ #define for_each_sg(sglist, sg, sgmax, iter) \
for (iter = 0, sg = (sglist); iter < (sgmax); iter++, sg = sg_next(sg)) for (iter = 0, sg = (sglist); iter < (sgmax); iter++, sg = sg_next(sg))
▲ Show 20 Lines • Show All 349 Lines • ▼ Show 20 Lines if (nents) {
iter->sg_pgoffset = 0; iter->sg_pgoffset = 0;
iter->maxents = 0; iter->maxents = 0;
} }
} }
static inline dma_addr_t static inline dma_addr_t
sg_page_iter_dma_address(struct sg_page_iter *spi) sg_page_iter_dma_address(struct sg_page_iter *spi)
{ {
return (spi->sg->address + (spi->sg_pgoffset << PAGE_SHIFT)); return (spi->sg->dma_address + (spi->sg_pgoffset << PAGE_SHIFT));
} }
static inline struct page * static inline struct page *
sg_page_iter_page(struct sg_page_iter *piter) sg_page_iter_page(struct sg_page_iter *piter)
{ {
return (nth_page(sg_page(piter->sg), piter->sg_pgoffset)); return (nth_page(sg_page(piter->sg), piter->sg_pgoffset));
} }
#endif /* _LINUX_SCATTERLIST_H_ */ #endif /* _LINUX_SCATTERLIST_H_ */