From 99bbc67f936bd0c69b368646e514b17e7584d253 Mon Sep 17 00:00:00 2001 From: "kfraser@localhost.localdomain" Date: Thu, 30 Nov 2006 17:21:52 +0000 Subject: [PATCH] linux/x86-64: missing agp.h This causes data corruption and/or crashes when AGP is actually used. Signed-off-by: Jan Beulich --- .../include/asm-x86_64/mach-xen/asm/agp.h | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/agp.h diff --git a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/agp.h b/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/agp.h new file mode 100644 index 0000000000..60c12a8b71 --- /dev/null +++ b/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/agp.h @@ -0,0 +1,35 @@ +#ifndef AGP_H +#define AGP_H 1 + +#include +#include + +/* + * Functions to keep the agpgart mappings coherent. + * The GART gives the CPU a physical alias of memory. The alias is + * mapped uncacheable. Make sure there are no conflicting mappings + * with different cachability attributes for the same page. + */ + +int map_page_into_agp(struct page *page); +int unmap_page_from_agp(struct page *page); +#define flush_agp_mappings() global_flush_tlb() + +/* Could use CLFLUSH here if the cpu supports it. But then it would + need to be called for each cacheline of the whole page so it may not be + worth it. Would need a page for it. */ +#define flush_agp_cache() wbinvd() + +/* Convert a physical address to an address suitable for the GART. */ +#define phys_to_gart(x) phys_to_machine(x) +#define gart_to_phys(x) machine_to_phys(x) + +/* GATT allocation. Returns/accepts GATT kernel virtual address. */ +#define alloc_gatt_pages(order) ({ \ + char *_t; dma_addr_t _d; \ + _t = dma_alloc_coherent(NULL,PAGE_SIZE<<(order),&_d,GFP_KERNEL); \ + _t; }) +#define free_gatt_pages(table, order) \ + dma_free_coherent(NULL,PAGE_SIZE<<(order),(table),virt_to_bus(table)) + +#endif -- 2.30.2