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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * include/asm-v850/pci.h -- PCI support
3 *
Miles Bader8b2bf062005-07-27 11:44:55 -07004 * Copyright (C) 2001,02,05 NEC Corporation
5 * Copyright (C) 2001,02,05 Miles Bader <miles@gnu.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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
Miles Bader8b2bf062005-07-27 11:44:55 -070051pci_dma_sync_single_for_cpu (struct pci_dev *dev, dma_addr_t dma_addr,
52 size_t size, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54extern void
Miles Bader8b2bf062005-07-27 11:44:55 -070055pci_dma_sync_single_for_device (struct pci_dev *dev, dma_addr_t dma_addr,
56 size_t size, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
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
Miles Bader8b2bf062005-07-27 11:44:55 -070068/* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070090/* 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
Andrew Mortonbb4a61b2005-06-06 23:07:46 -0700106#ifdef CONFIG_PCI
David S. Millere24c2d92005-06-02 12:55:50 -0700107static 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}
Andrew Mortonbb4a61b2005-06-06 23:07:46 -0700114#endif
David S. Millere24c2d92005-06-02 12:55:50 -0700115
Miles Bader8b2bf062005-07-27 11:44:55 -0700116extern 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119#endif /* __V850_PCI_H__ */