[CIFS] Check return code on failed alloc
[linux-2.6/pdupreez.git] / include / asm-powerpc / pci.h
blob7b11765c6865f31157dd30c6ee91ba5c1ecc9ad0
1 #ifndef __ASM_POWERPC_PCI_H
2 #define __ASM_POWERPC_PCI_H
3 #ifdef __KERNEL__
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.
12 #include <linux/types.h>
13 #include <linux/slab.h>
14 #include <linux/string.h>
15 #include <linux/dma-mapping.h>
17 #include <asm/machdep.h>
18 #include <asm/scatterlist.h>
19 #include <asm/io.h>
20 #include <asm/prom.h>
21 #include <asm/pci-bridge.h>
23 #include <asm-generic/pci-dma-compat.h>
25 #define PCIBIOS_MIN_IO 0x1000
26 #define PCIBIOS_MIN_MEM 0x10000000
28 struct pci_dev;
30 /* Values for the `which' argument to sys_pciconfig_iobase syscall. */
31 #define IOBASE_BRIDGE_NUMBER 0
32 #define IOBASE_MEMORY 1
33 #define IOBASE_IO 2
34 #define IOBASE_ISA_IO 3
35 #define IOBASE_ISA_MEM 4
38 * Set this to 1 if you want the kernel to re-assign all PCI
39 * bus numbers
41 extern int pci_assign_all_buses;
42 #define pcibios_assign_all_busses() (pci_assign_all_buses)
44 #define pcibios_scan_all_fns(a, b) 0
46 static inline void pcibios_set_master(struct pci_dev *dev)
48 /* No special bus mastering setup handling */
51 static inline void pcibios_penalize_isa_irq(int irq, int active)
53 /* We don't do dynamic PCI IRQ allocation */
56 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
57 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
59 if (ppc_md.pci_get_legacy_ide_irq)
60 return ppc_md.pci_get_legacy_ide_irq(dev, channel);
61 return channel ? 15 : 14;
64 #ifdef CONFIG_PPC64
67 * We want to avoid touching the cacheline size or MWI bit.
68 * pSeries firmware sets the cacheline size (which is not the cpu cacheline
69 * size in all cases) and hardware treats MWI the same as memory write.
71 #define PCI_DISABLE_MWI
73 #ifdef CONFIG_PCI
74 extern void set_pci_dma_ops(struct dma_mapping_ops *dma_ops);
75 extern struct dma_mapping_ops *get_pci_dma_ops(void);
77 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
78 enum pci_dma_burst_strategy *strat,
79 unsigned long *strategy_parameter)
81 unsigned long cacheline_size;
82 u8 byte;
84 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
85 if (byte == 0)
86 cacheline_size = 1024;
87 else
88 cacheline_size = (int) byte * 4;
90 *strat = PCI_DMA_BURST_MULTIPLE;
91 *strategy_parameter = cacheline_size;
93 #else /* CONFIG_PCI */
94 #define set_pci_dma_ops(d)
95 #define get_pci_dma_ops() NULL
96 #endif
98 /* Decide whether to display the domain number in /proc */
99 extern int pci_proc_domain(struct pci_bus *bus);
101 #else /* 32-bit */
103 #ifdef CONFIG_PCI
104 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
105 enum pci_dma_burst_strategy *strat,
106 unsigned long *strategy_parameter)
108 *strat = PCI_DMA_BURST_INFINITY;
109 *strategy_parameter = ~0UL;
111 #endif
113 /* Set the name of the bus as it appears in /proc/bus/pci */
114 static inline int pci_proc_domain(struct pci_bus *bus)
116 return 0;
119 #endif /* CONFIG_PPC64 */
121 extern int pci_domain_nr(struct pci_bus *bus);
123 struct vm_area_struct;
124 /* Map a range of PCI memory or I/O space for a device into user space */
125 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
126 enum pci_mmap_state mmap_state, int write_combine);
128 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
129 #define HAVE_PCI_MMAP 1
131 #if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
133 * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
134 * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
135 * so on are not nops.
136 * and thus...
138 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
139 dma_addr_t ADDR_NAME;
140 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
141 __u32 LEN_NAME;
142 #define pci_unmap_addr(PTR, ADDR_NAME) \
143 ((PTR)->ADDR_NAME)
144 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
145 (((PTR)->ADDR_NAME) = (VAL))
146 #define pci_unmap_len(PTR, LEN_NAME) \
147 ((PTR)->LEN_NAME)
148 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
149 (((PTR)->LEN_NAME) = (VAL))
151 #else /* 32-bit && coherent */
153 /* pci_unmap_{page,single} is a nop so... */
154 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
155 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
156 #define pci_unmap_addr(PTR, ADDR_NAME) (0)
157 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
158 #define pci_unmap_len(PTR, LEN_NAME) (0)
159 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
161 #endif /* CONFIG_PPC64 || CONFIG_NOT_COHERENT_CACHE */
163 #ifdef CONFIG_PPC64
165 /* The PCI address space does not equal the physical memory address
166 * space (we have an IOMMU). The IDE and SCSI device layers use
167 * this boolean for bounce buffer decisions.
169 #define PCI_DMA_BUS_IS_PHYS (0)
171 #else /* 32-bit */
173 /* The PCI address space does equal the physical memory
174 * address space (no IOMMU). The IDE and SCSI device layers use
175 * this boolean for bounce buffer decisions.
177 #define PCI_DMA_BUS_IS_PHYS (1)
179 #endif /* CONFIG_PPC64 */
181 extern void pcibios_resource_to_bus(struct pci_dev *dev,
182 struct pci_bus_region *region,
183 struct resource *res);
185 extern void pcibios_bus_to_resource(struct pci_dev *dev,
186 struct resource *res,
187 struct pci_bus_region *region);
189 static inline struct resource *pcibios_select_root(struct pci_dev *pdev,
190 struct resource *res)
192 struct resource *root = NULL;
194 if (res->flags & IORESOURCE_IO)
195 root = &ioport_resource;
196 if (res->flags & IORESOURCE_MEM)
197 root = &iomem_resource;
199 return root;
202 extern void pcibios_fixup_device_resources(struct pci_dev *dev,
203 struct pci_bus *bus);
205 extern void pcibios_setup_new_device(struct pci_dev *dev);
207 extern void pcibios_claim_one_bus(struct pci_bus *b);
209 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
211 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
212 struct pci_bus *bus, int devfn);
214 extern void of_scan_pci_bridge(struct device_node *node,
215 struct pci_dev *dev);
217 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
219 extern int pci_read_irq_line(struct pci_dev *dev);
221 struct file;
222 extern pgprot_t pci_phys_mem_access_prot(struct file *file,
223 unsigned long pfn,
224 unsigned long size,
225 pgprot_t prot);
227 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
228 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
229 const struct resource *rsrc,
230 resource_size_t *start, resource_size_t *end);
232 #endif /* __KERNEL__ */
233 #endif /* __ASM_POWERPC_PCI_H */