tjh.dev
Linux kernel mirror (for testing)
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linux
1/* pci.h: FR-V specific PCI declarations
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 * - Derived from include/asm-m68k/pci.h
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#ifndef ASM_PCI_H
14#define ASM_PCI_H
15
16#include <linux/mm.h>
17#include <asm/scatterlist.h>
18#include <asm-generic/pci-dma-compat.h>
19#include <asm-generic/pci.h>
20
21struct pci_dev;
22
23#define pcibios_assign_all_busses() 0
24
25extern void pcibios_set_master(struct pci_dev *dev);
26
27extern void pcibios_penalize_isa_irq(int irq);
28
29#ifdef CONFIG_MMU
30extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
31extern void consistent_free(void *vaddr);
32extern void consistent_sync(void *vaddr, size_t size, int direction);
33extern void consistent_sync_page(struct page *page, unsigned long offset,
34 size_t size, int direction);
35#endif
36
37extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
38 dma_addr_t *dma_handle);
39
40extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
41 void *vaddr, dma_addr_t dma_handle);
42
43/* Return the index of the PCI controller for device PDEV. */
44#define pci_controller_num(PDEV) (0)
45
46/* The PCI address space does equal the physical memory
47 * address space. The networking and block device layers use
48 * this boolean for bounce buffer decisions.
49 */
50#define PCI_DMA_BUS_IS_PHYS (1)
51
52/* pci_unmap_{page,single} is a nop so... */
53#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
54#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
55#define pci_unmap_addr(PTR, ADDR_NAME) (0)
56#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
57#define pci_unmap_len(PTR, LEN_NAME) (0)
58#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
59
60#ifdef CONFIG_PCI
61static inline void pci_dma_burst_advice(struct pci_dev *pdev,
62 enum pci_dma_burst_strategy *strat,
63 unsigned long *strategy_parameter)
64{
65 *strat = PCI_DMA_BURST_INFINITY;
66 *strategy_parameter = ~0UL;
67}
68#endif
69
70/*
71 * These are pretty much arbitary with the CoMEM implementation.
72 * We have the whole address space to ourselves.
73 */
74#define PCIBIOS_MIN_IO 0x100
75#define PCIBIOS_MIN_MEM 0x00010000
76
77/* Make physical memory consistent for a single
78 * streaming mode DMA translation after a transfer.
79 *
80 * If you perform a pci_map_single() but wish to interrogate the
81 * buffer using the cpu, yet do not wish to teardown the PCI dma
82 * mapping, you must call this function before doing so. At the
83 * next point you give the PCI dma address back to the card, the
84 * device again owns the buffer.
85 */
86static inline void pci_dma_sync_single(struct pci_dev *hwdev,
87 dma_addr_t dma_handle,
88 size_t size, int direction)
89{
90 if (direction == PCI_DMA_NONE)
91 BUG();
92
93 frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
94 (unsigned long)bus_to_virt(dma_handle) + size);
95}
96
97/* Make physical memory consistent for a set of streaming
98 * mode DMA translations after a transfer.
99 *
100 * The same as pci_dma_sync_single but for a scatter-gather list,
101 * same rules and usage.
102 */
103static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
104 struct scatterlist *sg,
105 int nelems, int direction)
106{
107 int i;
108
109 if (direction == PCI_DMA_NONE)
110 BUG();
111
112 for (i = 0; i < nelems; i++)
113 frv_cache_wback_inv(sg_dma_address(&sg[i]),
114 sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
115}
116
117
118#endif