From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-frv/scatterlist.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 include/asm-frv/scatterlist.h (limited to 'include/asm-frv/scatterlist.h') diff --git a/include/asm-frv/scatterlist.h b/include/asm-frv/scatterlist.h new file mode 100644 index 00000000000..fb38fd329a5 --- /dev/null +++ b/include/asm-frv/scatterlist.h @@ -0,0 +1,32 @@ +#ifndef _ASM_SCATTERLIST_H +#define _ASM_SCATTERLIST_H + +/* + * Drivers must set either ->address or (preferred) ->page and ->offset + * to indicate where data must be transferred to/from. + * + * Using ->page is recommended since it handles highmem data as well as + * low mem. ->address is restricted to data which has a virtual mapping, and + * it will go away in the future. Updating to ->page can be automated very + * easily -- something like + * + * sg->address = some_ptr; + * + * can be rewritten as + * + * sg->page = virt_to_page(some_ptr); + * sg->offset = (unsigned long) some_ptr & ~PAGE_MASK; + * + * and that's it. There's no excuse for not highmem enabling YOUR driver. /jens + */ +struct scatterlist { + struct page *page; /* Location for highmem page, if any */ + unsigned int offset; /* for highmem, page offset */ + + dma_addr_t dma_address; + unsigned int length; +}; + +#define ISA_DMA_THRESHOLD (0xffffffffUL) + +#endif /* !_ASM_SCATTERLIST_H */ -- cgit v1.2.3