LXR linux/arch/powerpc/include/asm/pci.h

   1#ifndef __ASM_POWERPC_PCI_H
   2#define __ASM_POWERPC_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#include <asm/pci-bridge.h>
  22
  23#include <asm-generic/pci-dma-compat.h>
  24
  25/* Return values for ppc_md.pci_probe_mode function */
  26#define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
  27#define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
  28#define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
  29
  30#define PCIBIOS_MIN_IO          0x1000
  31#define PCIBIOS_MIN_MEM         0x10000000
  32
  33struct pci_dev;
  34
  35/* Values for the `which' argument to sys_pciconfig_iobase syscall.  */
  36#define IOBASE_BRIDGE_NUMBER    0
  37#define IOBASE_MEMORY           1
  38#define IOBASE_IO               2
  39#define IOBASE_ISA_IO           3
  40#define IOBASE_ISA_MEM          4
  41
  42/*
  43 * Set this to 1 if you want the kernel to re-assign all PCI
  44 * bus numbers (don't do that on ppc64 yet !)
  45 */
  46#define pcibios_assign_all_busses() \
  47        (ppc_pci_has_flag(PPC_PCI_REASSIGN_ALL_BUS))
  48
  49static inline void pcibios_set_master(struct pci_dev *dev)
  50{
  51        /* No special bus mastering setup handling */
  52}
  53
  54static inline void pcibios_penalize_isa_irq(int irq, int active)
  55{
  56        /* We don't do dynamic PCI IRQ allocation */
  57}
  58
  59#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
  60static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  61{
  62        if (ppc_md.pci_get_legacy_ide_irq)
  63                return ppc_md.pci_get_legacy_ide_irq(dev, channel);
  64        return channel ? 15 : 14;
  65}
  66
  67#ifdef CONFIG_PCI
  68extern void set_pci_dma_ops(struct dma_map_ops *dma_ops);
  69extern struct dma_map_ops *get_pci_dma_ops(void);
  70#else   /* CONFIG_PCI */
  71#define set_pci_dma_ops(d)
  72#define get_pci_dma_ops()       NULL
  73#endif
  74
  75#ifdef CONFIG_PPC64
  76
  77/*
  78 * We want to avoid touching the cacheline size or MWI bit.
  79 * pSeries firmware sets the cacheline size (which is not the cpu cacheline
  80 * size in all cases) and hardware treats MWI the same as memory write.
  81 */
  82#define PCI_DISABLE_MWI
  83
  84#ifdef CONFIG_PCI
  85static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  86                                        enum pci_dma_burst_strategy *strat,
  87                                        unsigned long *strategy_parameter)
  88{
  89        unsigned long cacheline_size;
  90        u8 byte;
  91
  92        pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
  93        if (byte == 0)
  94                cacheline_size = 1024;
  95        else
  96                cacheline_size = (int) byte * 4;
  97
  98        *strat = PCI_DMA_BURST_MULTIPLE;
  99        *strategy_parameter = cacheline_size;
 100}
 101#endif
 102
 103#else /* 32-bit */
 104
 105#ifdef CONFIG_PCI
 106static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 107                                        enum pci_dma_burst_strategy *strat,
 108                                        unsigned long *strategy_parameter)
 109{
 110        *strat = PCI_DMA_BURST_INFINITY;
 111        *strategy_parameter = ~0UL;
 112}
 113#endif
 114#endif /* CONFIG_PPC64 */
 115
 116extern int pci_domain_nr(struct pci_bus *bus);
 117
 118/* Decide whether to display the domain number in /proc */
 119extern int pci_proc_domain(struct pci_bus *bus);
 120
 121/* MSI arch hooks */
 122#define arch_setup_msi_irqs arch_setup_msi_irqs
 123#define arch_teardown_msi_irqs arch_teardown_msi_irqs
 124#define arch_msi_check_device arch_msi_check_device
 125
 126struct vm_area_struct;
 127/* Map a range of PCI memory or I/O space for a device into user space */
 128int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
 129                        enum pci_mmap_state mmap_state, int write_combine);
 130
 131/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
 132#define HAVE_PCI_MMAP   1
 133
 134extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
 135                           size_t count);
 136extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
 137                           size_t count);
 138extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
 139                                      struct vm_area_struct *vma,
 140                                      enum pci_mmap_state mmap_state);
 141
 142#define HAVE_PCI_LEGACY 1
 143
 144#if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
 145/*
 146 * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
 147 * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
 148 * so on are not nops.
 149 * and thus...
 150 */
 151#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
 152        dma_addr_t ADDR_NAME;
 153#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
 154        __u32 LEN_NAME;
 155#define pci_unmap_addr(PTR, ADDR_NAME)                  \
 156        ((PTR)->ADDR_NAME)
 157#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
 158        (((PTR)->ADDR_NAME) = (VAL))
 159#define pci_unmap_len(PTR, LEN_NAME)                    \
 160        ((PTR)->LEN_NAME)
 161#define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
 162        (((PTR)->LEN_NAME) = (VAL))
 163
 164#else /* 32-bit && coherent */
 165
 166/* pci_unmap_{page,single} is a nop so... */
 167#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 168#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 169#define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 170#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 171#define pci_unmap_len(PTR, LEN_NAME)            (0)
 172#define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 173
 174#endif /* CONFIG_PPC64 || CONFIG_NOT_COHERENT_CACHE */
 175
 176#ifdef CONFIG_PPC64
 177
 178/* The PCI address space does not equal the physical memory address
 179 * space (we have an IOMMU).  The IDE and SCSI device layers use
 180 * this boolean for bounce buffer decisions.
 181 */
 182#define PCI_DMA_BUS_IS_PHYS     (0)
 183
 184#else /* 32-bit */
 185
 186/* The PCI address space does equal the physical memory
 187 * address space (no IOMMU).  The IDE and SCSI device layers use
 188 * this boolean for bounce buffer decisions.
 189 */
 190#define PCI_DMA_BUS_IS_PHYS     (1)
 191
 192#endif /* CONFIG_PPC64 */
 193
 194extern void pcibios_resource_to_bus(struct pci_dev *dev,
 195                        struct pci_bus_region *region,
 196                        struct resource *res);
 197
 198extern void pcibios_bus_to_resource(struct pci_dev *dev,
 199                        struct resource *res,
 200                        struct pci_bus_region *region);
 201
 202extern void pcibios_claim_one_bus(struct pci_bus *b);
 203
 204extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
 205
 206extern void pcibios_resource_survey(void);
 207
 208extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
 209extern int remove_phb_dynamic(struct pci_controller *phb);
 210
 211extern struct pci_dev *of_create_pci_dev(struct device_node *node,
 212                                        struct pci_bus *bus, int devfn);
 213
 214extern void of_scan_pci_bridge(struct device_node *node,
 215                                struct pci_dev *dev);
 216
 217extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 218extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
 219
 220extern int pci_read_irq_line(struct pci_dev *dev);
 221
 222struct file;
 223extern pgprot_t pci_phys_mem_access_prot(struct file *file,
 224                                         unsigned long pfn,
 225                                         unsigned long size,
 226                                         pgprot_t prot);
 227
 228#define HAVE_ARCH_PCI_RESOURCE_TO_USER
 229extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 230                                 const struct resource *rsrc,
 231                                 resource_size_t *start, resource_size_t *end);
 232
 233extern void pcibios_setup_bus_devices(struct pci_bus *bus);
 234extern void pcibios_setup_bus_self(struct pci_bus *bus);
 235extern void pcibios_setup_phb_io_space(struct pci_controller *hose);
 236extern void pcibios_scan_phb(struct pci_controller *hose, void *sysdata);
 237
 238#endif  /* __KERNEL__ */
 239#endif /* __ASM_POWERPC_PCI_H */
 240