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sys/compat/linuxkpi/common/include/linux/scatterlist.h
| Show All 30 Lines | |||||
| */ | */ | ||||
| #ifndef _LINUX_SCATTERLIST_H_ | #ifndef _LINUX_SCATTERLIST_H_ | ||||
| #define _LINUX_SCATTERLIST_H_ | #define _LINUX_SCATTERLIST_H_ | ||||
| #include <linux/page.h> | #include <linux/page.h> | ||||
| #include <linux/slab.h> | #include <linux/slab.h> | ||||
| #include <linux/mm.h> | #include <linux/mm.h> | ||||
| struct bus_dmamap; | |||||
| 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; | ||||
| dma_addr_t dma_address; | dma_addr_t dma_address; | ||||
| unsigned int dma_length; | struct bus_dmamap *dma_map; /* FreeBSD specific */ | ||||
| }; | }; | ||||
| 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; | ||||
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| #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)->dma_address | #define sg_dma_address(sg) (sg)->dma_address | ||||
| #define sg_dma_len(sg) (sg)->dma_length | #define sg_dma_len(sg) (sg)->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)) | ||||
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