include/asm-powerpc/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 #define PCIBIOS_MIN_IO          0x1000
  26 #define PCIBIOS_MIN_MEM         0x10000000
  27
  28 struct pci_dev;
  29
  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
  36
  37 /*
  38  * Set this to 1 if you want the kernel to re-assign all PCI
  39  * bus numbers
  40  */
  41 #ifdef CONFIG_PPC64
  42 #define pcibios_assign_all_busses()     0
  43 #else
  44 #define pcibios_assign_all_busses()     (ppc_pci_flags & \
  45                                          PPC_PCI_REASSIGN_ALL_BUS)
  46 #endif
  47 #define pcibios_scan_all_fns(a, b)      0
  48
  49 static inline void pcibios_set_master(struct pci_dev *dev)
  50 {
  51         /* No special bus mastering setup handling */
  52 }
  53
  54 static 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
  60 static 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_PPC64
  68
  69 /*
  70  * We want to avoid touching the cacheline size or MWI bit.
  71  * pSeries firmware sets the cacheline size (which is not the cpu cacheline
  72  * size in all cases) and hardware treats MWI the same as memory write.
  73  */
  74 #define PCI_DISABLE_MWI
  75
  76 #ifdef CONFIG_PCI
  77 extern void set_pci_dma_ops(struct dma_mapping_ops *dma_ops);
  78 extern struct dma_mapping_ops *get_pci_dma_ops(void);
  79
  80 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  81                                         enum pci_dma_burst_strategy *strat,
  82                                         unsigned long *strategy_parameter)
  83 {
  84         unsigned long cacheline_size;
  85         u8 byte;
  86
  87         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
  88         if (byte == 0)
  89                 cacheline_size = 1024;
  90         else
  91                 cacheline_size = (int) byte * 4;
  92
  93         *strat = PCI_DMA_BURST_MULTIPLE;
  94         *strategy_parameter = cacheline_size;
  95 }
  96 #else   /* CONFIG_PCI */
  97 #define set_pci_dma_ops(d)
  98 #define get_pci_dma_ops()       NULL
  99 #endif
 100
 101 #else /* 32-bit */
 102
 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)
 107 {
 108         *strat = PCI_DMA_BURST_INFINITY;
 109         *strategy_parameter = ~0UL;
 110 }
 111 #endif
 112 #endif /* CONFIG_PPC64 */
 113
 114 extern int pci_domain_nr(struct pci_bus *bus);
 115
 116 /* Decide whether to display the domain number in /proc */
 117 extern int pci_proc_domain(struct pci_bus *bus);
 118
 119
 120 struct vm_area_struct;
 121 /* Map a range of PCI memory or I/O space for a device into user space */
 122 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
 123                         enum pci_mmap_state mmap_state, int write_combine);
 124
 125 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
 126 #define HAVE_PCI_MMAP   1
 127
 128 #if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
 129 /*
 130  * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
 131  * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
 132  * so on are not nops.
 133  * and thus...
 134  */
 135 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
 136         dma_addr_t ADDR_NAME;
 137 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
 138         __u32 LEN_NAME;
 139 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
 140         ((PTR)->ADDR_NAME)
 141 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
 142         (((PTR)->ADDR_NAME) = (VAL))
 143 #define pci_unmap_len(PTR, LEN_NAME)                    \
 144         ((PTR)->LEN_NAME)
 145 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
 146         (((PTR)->LEN_NAME) = (VAL))
 147
 148 #else /* 32-bit && coherent */
 149
 150 /* pci_unmap_{page,single} is a nop so... */
 151 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 152 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 153 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 154 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 155 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 156 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 157
 158 #endif /* CONFIG_PPC64 || CONFIG_NOT_COHERENT_CACHE */
 159
 160 #ifdef CONFIG_PPC64
 161
 162 /* The PCI address space does not equal the physical memory address
 163  * space (we have an IOMMU).  The IDE and SCSI device layers use
 164  * this boolean for bounce buffer decisions.
 165  */
 166 #define PCI_DMA_BUS_IS_PHYS     (0)
 167
 168 #else /* 32-bit */
 169
 170 /* The PCI address space does equal the physical memory
 171  * address space (no IOMMU).  The IDE and SCSI device layers use
 172  * this boolean for bounce buffer decisions.
 173  */
 174 #define PCI_DMA_BUS_IS_PHYS     (1)
 175
 176 #endif /* CONFIG_PPC64 */
 177
 178 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 179                         struct pci_bus_region *region,
 180                         struct resource *res);
 181
 182 extern void pcibios_bus_to_resource(struct pci_dev *dev,
 183                         struct resource *res,
 184                         struct pci_bus_region *region);
 185
 186 static inline struct resource *pcibios_select_root(struct pci_dev *pdev,
 187                         struct resource *res)
 188 {
 189         struct resource *root = NULL;
 190
 191         if (res->flags & IORESOURCE_IO)
 192                 root = &ioport_resource;
 193         if (res->flags & IORESOURCE_MEM)
 194                 root = &iomem_resource;
 195
 196         return root;
 197 }
 198
 199 extern void pcibios_setup_new_device(struct pci_dev *dev);
 200
 201 extern void pcibios_claim_one_bus(struct pci_bus *b);
 202
 203 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
 204
 205 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
 206                                         struct pci_bus *bus, int devfn);
 207
 208 extern void of_scan_pci_bridge(struct device_node *node,
 209                                 struct pci_dev *dev);
 210
 211 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 212
 213 extern int pci_read_irq_line(struct pci_dev *dev);
 214
 215 struct file;
 216 extern pgprot_t pci_phys_mem_access_prot(struct file *file,
 217                                          unsigned long pfn,
 218                                          unsigned long size,
 219                                          pgprot_t prot);
 220
 221 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
 222 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 223                                  const struct resource *rsrc,
 224                                  resource_size_t *start, resource_size_t *end);
 225
 226 extern void pcibios_do_bus_setup(struct pci_bus *bus);
 227 extern void pcibios_fixup_of_probed_bus(struct pci_bus *bus);
 228
 229 #endif  /* __KERNEL__ */
 230 #endif /* __ASM_POWERPC_PCI_H */