tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __PPC64_PCI_H
2#define __PPC64_PCI_H
3#ifdef __KERNEL__
4
5/*
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <linux/string.h>
15#include <linux/dma-mapping.h>
16
17#include <asm/machdep.h>
18#include <asm/scatterlist.h>
19#include <asm/io.h>
20#include <asm/prom.h>
21
22#include <asm-generic/pci-dma-compat.h>
23
24#define PCIBIOS_MIN_IO 0x1000
25#define PCIBIOS_MIN_MEM 0x10000000
26
27struct pci_dev;
28
29#ifdef CONFIG_PPC_ISERIES
30#define pcibios_scan_all_fns(a, b) 0
31#else
32extern int pcibios_scan_all_fns(struct pci_bus *bus, int devfn);
33#endif
34
35static inline void pcibios_set_master(struct pci_dev *dev)
36{
37 /* No special bus mastering setup handling */
38}
39
40static inline void pcibios_penalize_isa_irq(int irq)
41{
42 /* We don't do dynamic PCI IRQ allocation */
43}
44
45#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
46static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
47{
48 if (ppc_md.pci_get_legacy_ide_irq)
49 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
50 return channel ? 15 : 14;
51}
52
53#define HAVE_ARCH_PCI_MWI 1
54static inline int pcibios_prep_mwi(struct pci_dev *dev)
55{
56 /*
57 * We would like to avoid touching the cacheline size or MWI bit
58 * but we cant do that with the current pcibios_prep_mwi
59 * interface. pSeries firmware sets the cacheline size (which is not
60 * the cpu cacheline size in all cases) and hardware treats MWI
61 * the same as memory write. So we dont touch the cacheline size
62 * here and allow the generic code to set the MWI bit.
63 */
64 return 0;
65}
66
67extern unsigned int pcibios_assign_all_busses(void);
68
69extern struct dma_mapping_ops pci_dma_ops;
70
71/* For DAC DMA, we currently don't support it by default, but
72 * we let the platform override this
73 */
74static inline int pci_dac_dma_supported(struct pci_dev *hwdev,u64 mask)
75{
76 if (pci_dma_ops.dac_dma_supported)
77 return pci_dma_ops.dac_dma_supported(&hwdev->dev, mask);
78 return 0;
79}
80
81#ifdef CONFIG_PCI
82static inline void pci_dma_burst_advice(struct pci_dev *pdev,
83 enum pci_dma_burst_strategy *strat,
84 unsigned long *strategy_parameter)
85{
86 unsigned long cacheline_size;
87 u8 byte;
88
89 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
90 if (byte == 0)
91 cacheline_size = 1024;
92 else
93 cacheline_size = (int) byte * 4;
94
95 *strat = PCI_DMA_BURST_MULTIPLE;
96 *strategy_parameter = cacheline_size;
97}
98#endif
99
100extern int pci_domain_nr(struct pci_bus *bus);
101
102/* Decide whether to display the domain number in /proc */
103extern int pci_proc_domain(struct pci_bus *bus);
104
105struct vm_area_struct;
106/* Map a range of PCI memory or I/O space for a device into user space */
107int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
108 enum pci_mmap_state mmap_state, int write_combine);
109
110/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
111#define HAVE_PCI_MMAP 1
112
113/* pci_unmap_{single,page} is not a nop, thus... */
114#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
115 dma_addr_t ADDR_NAME;
116#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
117 __u32 LEN_NAME;
118#define pci_unmap_addr(PTR, ADDR_NAME) \
119 ((PTR)->ADDR_NAME)
120#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
121 (((PTR)->ADDR_NAME) = (VAL))
122#define pci_unmap_len(PTR, LEN_NAME) \
123 ((PTR)->LEN_NAME)
124#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
125 (((PTR)->LEN_NAME) = (VAL))
126
127/* The PCI address space does equal the physical memory
128 * address space. The networking and block device layers use
129 * this boolean for bounce buffer decisions.
130 */
131#define PCI_DMA_BUS_IS_PHYS (0)
132
133extern void
134pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
135 struct resource *res);
136
137extern int
138unmap_bus_range(struct pci_bus *bus);
139
140extern int
141remap_bus_range(struct pci_bus *bus);
142
143extern void
144pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus);
145
146extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
147
148extern int pci_read_irq_line(struct pci_dev *dev);
149
150extern void pcibios_add_platform_entries(struct pci_dev *dev);
151
152struct file;
153extern pgprot_t pci_phys_mem_access_prot(struct file *file,
154 unsigned long offset,
155 unsigned long size,
156 pgprot_t prot);
157
158#ifdef CONFIG_PPC_MULTIPLATFORM
159#define HAVE_ARCH_PCI_RESOURCE_TO_USER
160extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
161 const struct resource *rsrc,
162 u64 *start, u64 *end);
163#endif /* CONFIG_PPC_MULTIPLATFORM */
164
165
166#endif /* __KERNEL__ */
167
168#endif /* __PPC64_PCI_H */