arch/x86/include/asm/pci_x86.h

   1 /*
   2  *      Low-Level PCI Access for i386 machines.
   3  *
   4  *      (c) 1999 Martin Mares <mj@ucw.cz>
   5  */
   6
   7 #undef DEBUG
   8
   9 #ifdef DEBUG
  10 #define DBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
  11 #else
  12 #define DBG(fmt, ...)                           \
  13 do {                                            \
  14         if (0)                                  \
  15                 printk(fmt, ##__VA_ARGS__);     \
  16 } while (0)
  17 #endif
  18
  19 #define PCI_PROBE_BIOS          0x0001
  20 #define PCI_PROBE_CONF1         0x0002
  21 #define PCI_PROBE_CONF2         0x0004
  22 #define PCI_PROBE_MMCONF        0x0008
  23 #define PCI_PROBE_MASK          0x000f
  24 #define PCI_PROBE_NOEARLY       0x0010
  25
  26 #define PCI_NO_CHECKS           0x0400
  27 #define PCI_USE_PIRQ_MASK       0x0800
  28 #define PCI_ASSIGN_ROMS         0x1000
  29 #define PCI_BIOS_IRQ_SCAN       0x2000
  30 #define PCI_ASSIGN_ALL_BUSSES   0x4000
  31 #define PCI_CAN_SKIP_ISA_ALIGN  0x8000
  32 #define PCI_USE__CRS            0x10000
  33 #define PCI_CHECK_ENABLE_AMD_MMCONF     0x20000
  34 #define PCI_HAS_IO_ECS          0x40000
  35 #define PCI_NOASSIGN_ROMS       0x80000
  36 #define PCI_ROOT_NO_CRS         0x100000
  37 #define PCI_NOASSIGN_BARS       0x200000
  38
  39 extern unsigned int pci_probe;
  40 extern unsigned long pirq_table_addr;
  41
  42 enum pci_bf_sort_state {
  43         pci_bf_sort_default,
  44         pci_force_nobf,
  45         pci_force_bf,
  46         pci_dmi_bf,
  47 };
  48
  49 /* pci-i386.c */
  50
  51 void pcibios_resource_survey(void);
  52 void pcibios_set_cache_line_size(void);
  53
  54 /* pci-pc.c */
  55
  56 extern int pcibios_last_bus;
  57 extern struct pci_bus *pci_root_bus;
  58 extern struct pci_ops pci_root_ops;
  59
  60 void pcibios_scan_specific_bus(int busn);
  61
  62 /* pci-irq.c */
  63
  64 struct irq_info {
  65         u8 bus, devfn;                  /* Bus, device and function */
  66         struct {
  67                 u8 link;                /* IRQ line ID, chipset dependent,
  68                                            0 = not routed */
  69                 u16 bitmap;             /* Available IRQs */
  70         } __attribute__((packed)) irq[4];
  71         u8 slot;                        /* Slot number, 0=onboard */
  72         u8 rfu;
  73 } __attribute__((packed));
  74
  75 struct irq_routing_table {
  76         u32 signature;                  /* PIRQ_SIGNATURE should be here */
  77         u16 version;                    /* PIRQ_VERSION */
  78         u16 size;                       /* Table size in bytes */
  79         u8 rtr_bus, rtr_devfn;          /* Where the interrupt router lies */
  80         u16 exclusive_irqs;             /* IRQs devoted exclusively to
  81                                            PCI usage */
  82         u16 rtr_vendor, rtr_device;     /* Vendor and device ID of
  83                                            interrupt router */
  84         u32 miniport_data;              /* Crap */
  85         u8 rfu[11];
  86         u8 checksum;                    /* Modulo 256 checksum must give 0 */
  87         struct irq_info slots[0];
  88 } __attribute__((packed));
  89
  90 extern unsigned int pcibios_irq_mask;
  91
  92 extern raw_spinlock_t pci_config_lock;
  93
  94 extern int (*pcibios_enable_irq)(struct pci_dev *dev);
  95 extern void (*pcibios_disable_irq)(struct pci_dev *dev);
  96
  97 struct pci_raw_ops {
  98         int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
  99                                                 int reg, int len, u32 *val);
 100         int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
 101                                                 int reg, int len, u32 val);
 102 };
 103
 104 extern const struct pci_raw_ops *raw_pci_ops;
 105 extern const struct pci_raw_ops *raw_pci_ext_ops;
 106
 107 extern const struct pci_raw_ops pci_mmcfg;
 108 extern const struct pci_raw_ops pci_direct_conf1;
 109 extern bool port_cf9_safe;
 110
 111 /* arch_initcall level */
 112 extern int pci_direct_probe(void);
 113 extern void pci_direct_init(int type);
 114 extern void pci_pcbios_init(void);
 115 extern void __init dmi_check_pciprobe(void);
 116 extern void __init dmi_check_skip_isa_align(void);
 117
 118 /* some common used subsys_initcalls */
 119 extern int __init pci_acpi_init(void);
 120 extern void __init pcibios_irq_init(void);
 121 extern int __init pcibios_init(void);
 122 extern int pci_legacy_init(void);
 123 extern void pcibios_fixup_irqs(void);
 124
 125 /* pci-mmconfig.c */
 126
 127 /* "PCI MMCONFIG %04x [bus %02x-%02x]" */
 128 #define PCI_MMCFG_RESOURCE_NAME_LEN (22 + 4 + 2 + 2)
 129
 130 struct pci_mmcfg_region {
 131         struct list_head list;
 132         struct resource res;
 133         u64 address;
 134         char __iomem *virt;
 135         u16 segment;
 136         u8 start_bus;
 137         u8 end_bus;
 138         char name[PCI_MMCFG_RESOURCE_NAME_LEN];
 139 };
 140
 141 extern int __init pci_mmcfg_arch_init(void);
 142 extern void __init pci_mmcfg_arch_free(void);
 143 extern int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg);
 144 extern void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg);
 145 extern int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
 146                                phys_addr_t addr);
 147 extern int pci_mmconfig_delete(u16 seg, u8 start, u8 end);
 148 extern struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus);
 149
 150 extern struct list_head pci_mmcfg_list;
 151
 152 #define PCI_MMCFG_BUS_OFFSET(bus)      ((bus) << 20)
 153
 154 /*
 155  * AMD Fam10h CPUs are buggy, and cannot access MMIO config space
 156  * on their northbrige except through the * %eax register. As such, you MUST
 157  * NOT use normal IOMEM accesses, you need to only use the magic mmio-config
 158  * accessor functions.
 159  * In fact just use pci_config_*, nothing else please.
 160  */
 161 static inline unsigned char mmio_config_readb(void __iomem *pos)
 162 {
 163         u8 val;
 164         asm volatile("movb (%1),%%al" : "=a" (val) : "r" (pos));
 165         return val;
 166 }
 167
 168 static inline unsigned short mmio_config_readw(void __iomem *pos)
 169 {
 170         u16 val;
 171         asm volatile("movw (%1),%%ax" : "=a" (val) : "r" (pos));
 172         return val;
 173 }
 174
 175 static inline unsigned int mmio_config_readl(void __iomem *pos)
 176 {
 177         u32 val;
 178         asm volatile("movl (%1),%%eax" : "=a" (val) : "r" (pos));
 179         return val;
 180 }
 181
 182 static inline void mmio_config_writeb(void __iomem *pos, u8 val)
 183 {
 184         asm volatile("movb %%al,(%1)" : : "a" (val), "r" (pos) : "memory");
 185 }
 186
 187 static inline void mmio_config_writew(void __iomem *pos, u16 val)
 188 {
 189         asm volatile("movw %%ax,(%1)" : : "a" (val), "r" (pos) : "memory");
 190 }
 191
 192 static inline void mmio_config_writel(void __iomem *pos, u32 val)
 193 {
 194         asm volatile("movl %%eax,(%1)" : : "a" (val), "r" (pos) : "memory");
 195 }
 196
 197 #ifdef CONFIG_PCI
 198 # ifdef CONFIG_ACPI
 199 #  define x86_default_pci_init          pci_acpi_init
 200 # else
 201 #  define x86_default_pci_init          pci_legacy_init
 202 # endif
 203 # define x86_default_pci_init_irq       pcibios_irq_init
 204 # define x86_default_pci_fixup_irqs     pcibios_fixup_irqs
 205 #else
 206 # define x86_default_pci_init           NULL
 207 # define x86_default_pci_init_irq       NULL
 208 # define x86_default_pci_fixup_irqs     NULL
 209 #endif