projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9a88cbb5 RB |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> | |
| 7 | * | |
| 8 | */ | |
| 9 | #ifndef __ASM_MACH_IP27_DMA_COHERENCE_H | |
| 10 | #define __ASM_MACH_IP27_DMA_COHERENCE_H | |
| 11 | ||
| 12 | #include <asm/pci/bridge.h> | |
| 13 | ||
| 14 | #define pdev_to_baddr(pdev, addr) \ | |
| 15 | (BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr)) | |
| 16 | #define dev_to_baddr(dev, addr) \ | |
| 17 | pdev_to_baddr(to_pci_dev(dev), (addr)) | |
| 18 | ||
| 19 | struct device; | |
| 20 | ||
| f1dbf8e7 RB |
21 | static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, |
| 22 | size_t size) | |
| 9a88cbb5 RB |
23 | { |
| 24 | dma_addr_t pa = dev_to_baddr(dev, virt_to_phys(addr)); | |
| 25 | ||
| 26 | return pa; | |
| 27 | } | |
| 28 | ||
| 29 | static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page) | |
| 30 | { | |
| 31 | dma_addr_t pa = dev_to_baddr(dev, page_to_phys(page)); | |
| 32 | ||
| 33 | return pa; | |
| 34 | } | |
| 35 | ||
| 36 | static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr) | |
| 37 | { | |
| eaf7943c | 38 | return dma_addr & ~(0xffUL << 56); |
| 9a88cbb5 RB |
39 | } |
| 40 | ||
| 843aef49 | 41 | static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr) |
| 9a88cbb5 RB |
42 | { |
| 43 | } | |
| 44 | ||
| 843aef49 DD |
45 | static inline int plat_dma_supported(struct device *dev, u64 mask) |
| 46 | { | |
| 47 | /* | |
| 48 | * we fall back to GFP_DMA when the mask isn't all 1s, | |
| 49 | * so we can't guarantee allocations that must be | |
| 50 | * within a tighter range than GFP_DMA.. | |
| 51 | */ | |
| 52 | if (mask < DMA_BIT_MASK(24)) | |
| 53 | return 0; | |
| 54 | ||
| 55 | return 1; | |
| 56 | } | |
| 57 | ||
| 58 | static inline void plat_extra_sync_for_device(struct device *dev) | |
| 59 | { | |
| 60 | return; | |
| 61 | } | |
| 62 | ||
| 63 | static inline int plat_dma_mapping_error(struct device *dev, | |
| 64 | dma_addr_t dma_addr) | |
| 65 | { | |
| 66 | return 0; | |
| 67 | } | |
| 68 | ||
| 9a88cbb5 RB |
69 | static inline int plat_device_is_coherent(struct device *dev) |
| 70 | { | |
| 71 | return 1; /* IP27 non-cohernet mode is unsupported */ | |
| 72 | } | |
| 73 | ||
| 74 | #endif /* __ASM_MACH_IP27_DMA_COHERENCE_H */ |