1/* 2 * include/asm-v850/pci.h -- PCI support 3 * 4 * Copyright (C) 2001,02,05 NEC Corporation 5 * Copyright (C) 2001,02,05 Miles Bader <miles@gnu.org> 6 * 7 * This file is subject to the terms and conditions of the GNU General 8 * Public License. See the file COPYING in the main directory of this 9 * archive for more details. 10 * 11 * Written by Miles Bader <miles@gnu.org> 12 */ 13 14#ifndef __V850_PCI_H__ 15#define __V850_PCI_H__ 16 17/* Get any platform-dependent definitions. */ 18#include <asm/machdep.h> 19 20#define pcibios_scan_all_fns(a, b) 0 21 22/* Generic declarations. */ 23 24struct scatterlist; 25 26extern void pcibios_set_master (struct pci_dev *dev); 27 28/* `Grant' to PDEV the memory block at CPU_ADDR, for doing DMA. The 29 32-bit PCI bus mastering address to use is returned. the device owns 30 this memory until either pci_unmap_single or pci_dma_sync_single_for_cpu is 31 performed. */ 32extern dma_addr_t 33pci_map_single (struct pci_dev *pdev, void *cpu_addr, size_t size, int dir); 34 35/* Return to the CPU the PCI DMA memory block previously `granted' to 36 PDEV, at DMA_ADDR. */ 37extern void 38pci_unmap_single (struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, 39 int dir); 40 41/* Make physical memory consistent for a single streaming mode DMA 42 translation after a transfer. 43 44 If you perform a pci_map_single() but wish to interrogate the 45 buffer using the cpu, yet do not wish to teardown the PCI dma 46 mapping, you must call this function before doing so. At the next 47 point you give the PCI dma address back to the card, you must first 48 perform a pci_dma_sync_for_device, and then the device again owns 49 the buffer. */ 50extern void 51pci_dma_sync_single_for_cpu (struct pci_dev *dev, dma_addr_t dma_addr, 52 size_t size, int dir); 53 54extern void 55pci_dma_sync_single_for_device (struct pci_dev *dev, dma_addr_t dma_addr, 56 size_t size, int dir); 57 58 59/* Do multiple DMA mappings at once. */ 60extern int 61pci_map_sg (struct pci_dev *pdev, struct scatterlist *sg, int sg_len, int dir); 62 63/* Unmap multiple DMA mappings at once. */ 64extern void 65pci_unmap_sg (struct pci_dev *pdev, struct scatterlist *sg, int sg_len, 66 int dir); 67 68/* SG-list versions of pci_dma_sync functions. */ 69extern void 70pci_dma_sync_sg_for_cpu (struct pci_dev *dev, 71 struct scatterlist *sg, int sg_len, 72 int dir); 73extern void 74pci_dma_sync_sg_for_device (struct pci_dev *dev, 75 struct scatterlist *sg, int sg_len, 76 int dir); 77 78#define pci_map_page(dev, page, offs, size, dir) \ 79 pci_map_single(dev, (page_address(page) + (offs)), size, dir) 80#define pci_unmap_page(dev,addr,sz,dir) \ 81 pci_unmap_single(dev, addr, sz, dir) 82 83/* Test for pci_map_single or pci_map_page having generated an error. */ 84static inline int 85pci_dma_mapping_error (dma_addr_t dma_addr) 86{ 87 return dma_addr == 0; 88} 89 90/* Allocate and map kernel buffer using consistent mode DMA for PCI 91 device. Returns non-NULL cpu-view pointer to the buffer if 92 successful and sets *DMA_ADDR to the pci side dma address as well, 93 else DMA_ADDR is undefined. */ 94extern void * 95pci_alloc_consistent (struct pci_dev *pdev, size_t size, dma_addr_t *dma_addr); 96 97/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must 98 be values that were returned from pci_alloc_consistent. SIZE must be 99 the same as what as passed into pci_alloc_consistent. References to 100 the memory and mappings assosciated with CPU_ADDR or DMA_ADDR past 101 this call are illegal. */ 102extern void 103pci_free_consistent (struct pci_dev *pdev, size_t size, void *cpu_addr, 104 dma_addr_t dma_addr); 105 106#ifdef CONFIG_PCI 107static inline void pci_dma_burst_advice(struct pci_dev *pdev, 108 enum pci_dma_burst_strategy *strat, 109 unsigned long *strategy_parameter) 110{ 111 *strat = PCI_DMA_BURST_INFINITY; 112 *strategy_parameter = ~0UL; 113} 114#endif 115 116extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); 117extern void pci_iounmap (struct pci_dev *dev, void __iomem *addr); 118 119static inline void pcibios_add_platform_entries(struct pci_dev *dev) 120{ 121} 122 123#endif /* __V850_PCI_H__ */ 124