arch/s390/include/asm/pci.h

   1 #ifndef __ASM_S390_PCI_H
   2 #define __ASM_S390_PCI_H
   3
   4 /* must be set before including asm-generic/pci.h */
   5 #define PCI_DMA_BUS_IS_PHYS (0)
   6 /* must be set before including pci_clp.h */
   7 #define PCI_BAR_COUNT   6
   8
   9 #include <asm-generic/pci.h>
  10 #include <asm-generic/pci-dma-compat.h>
  11 #include <asm/pci_clp.h>
  12
  13 #define PCIBIOS_MIN_IO          0x1000
  14 #define PCIBIOS_MIN_MEM         0x10000000
  15
  16 #define pcibios_assign_all_busses()     (0)
  17
  18 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
  19 void pci_iounmap(struct pci_dev *, void __iomem *);
  20 int pci_domain_nr(struct pci_bus *);
  21 int pci_proc_domain(struct pci_bus *);
  22
  23 #define ZPCI_BUS_NR                     0       /* default bus number */
  24 #define ZPCI_DEVFN                      0       /* default device number */
  25
  26 /* PCI Function Controls */
  27 #define ZPCI_FC_FN_ENABLED              0x80
  28 #define ZPCI_FC_ERROR                   0x40
  29 #define ZPCI_FC_BLOCKED                 0x20
  30 #define ZPCI_FC_DMA_ENABLED             0x10
  31
  32 enum zpci_state {
  33         ZPCI_FN_STATE_RESERVED,
  34         ZPCI_FN_STATE_STANDBY,
  35         ZPCI_FN_STATE_CONFIGURED,
  36         ZPCI_FN_STATE_ONLINE,
  37         NR_ZPCI_FN_STATES,
  38 };
  39
  40 struct zpci_bar_struct {
  41         u32             val;            /* bar start & 3 flag bits */
  42         u8              size;           /* order 2 exponent */
  43         u16             map_idx;        /* index into bar mapping array */
  44 };
  45
  46 /* Private data per function */
  47 struct zpci_dev {
  48         struct pci_dev  *pdev;
  49         struct pci_bus  *bus;
  50         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  51
  52         enum zpci_state state;
  53         u32             fid;            /* function ID, used by sclp */
  54         u32             fh;             /* function handle, used by insn's */
  55         u16             pchid;          /* physical channel ID */
  56         u8              pfgid;          /* function group ID */
  57         u16             domain;
  58
  59         struct zpci_bar_struct bars[PCI_BAR_COUNT];
  60
  61         enum pci_bus_speed max_bus_speed;
  62 };
  63
  64 static inline bool zdev_enabled(struct zpci_dev *zdev)
  65 {
  66         return (zdev->fh & (1UL << 31)) ? true : false;
  67 }
  68
  69 /* -----------------------------------------------------------------------------
  70   Prototypes
  71 ----------------------------------------------------------------------------- */
  72 /* Base stuff */
  73 struct zpci_dev *zpci_alloc_device(void);
  74 int zpci_create_device(struct zpci_dev *);
  75 int zpci_enable_device(struct zpci_dev *);
  76 void zpci_stop_device(struct zpci_dev *);
  77 void zpci_free_device(struct zpci_dev *);
  78 int zpci_scan_device(struct zpci_dev *);
  79
  80 /* CLP */
  81 int clp_find_pci_devices(void);
  82 int clp_add_pci_device(u32, u32, int);
  83 int clp_enable_fh(struct zpci_dev *, u8);
  84 int clp_disable_fh(struct zpci_dev *);
  85
  86 /* Helpers */
  87 struct zpci_dev *get_zdev(struct pci_dev *);
  88 struct zpci_dev *get_zdev_by_fid(u32);
  89 bool zpci_fid_present(u32);
  90
  91 #endif