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 /* MSI arch hooks */
  24 #define arch_setup_msi_irqs     arch_setup_msi_irqs
  25 #define arch_teardown_msi_irqs  arch_teardown_msi_irqs
  26
  27 #define ZPCI_BUS_NR                     0       /* default bus number */
  28 #define ZPCI_DEVFN                      0       /* default device number */
  29
  30 /* PCI Function Controls */
  31 #define ZPCI_FC_FN_ENABLED              0x80
  32 #define ZPCI_FC_ERROR                   0x40
  33 #define ZPCI_FC_BLOCKED                 0x20
  34 #define ZPCI_FC_DMA_ENABLED             0x10
  35
  36 struct msi_map {
  37         unsigned long irq;
  38         struct msi_desc *msi;
  39         struct hlist_node msi_chain;
  40 };
  41
  42 #define ZPCI_NR_MSI_VECS        64
  43 #define ZPCI_MSI_MASK           (ZPCI_NR_MSI_VECS - 1)
  44
  45 enum zpci_state {
  46         ZPCI_FN_STATE_RESERVED,
  47         ZPCI_FN_STATE_STANDBY,
  48         ZPCI_FN_STATE_CONFIGURED,
  49         ZPCI_FN_STATE_ONLINE,
  50         NR_ZPCI_FN_STATES,
  51 };
  52
  53 struct zpci_bar_struct {
  54         u32             val;            /* bar start & 3 flag bits */
  55         u8              size;           /* order 2 exponent */
  56         u16             map_idx;        /* index into bar mapping array */
  57 };
  58
  59 /* Private data per function */
  60 struct zpci_dev {
  61         struct pci_dev  *pdev;
  62         struct pci_bus  *bus;
  63         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  64
  65         enum zpci_state state;
  66         u32             fid;            /* function ID, used by sclp */
  67         u32             fh;             /* function handle, used by insn's */
  68         u16             pchid;          /* physical channel ID */
  69         u8              pfgid;          /* function group ID */
  70         u16             domain;
  71
  72         /* IRQ stuff */
  73         u64             msi_addr;       /* MSI address */
  74         struct zdev_irq_map *irq_map;
  75         struct msi_map *msi_map[ZPCI_NR_MSI_VECS];
  76         unsigned int    aisb;           /* number of the summary bit */
  77
  78         /* DMA stuff */
  79         unsigned long   *dma_table;
  80         spinlock_t      dma_table_lock;
  81         int             tlb_refresh;
  82
  83         spinlock_t      iommu_bitmap_lock;
  84         unsigned long   *iommu_bitmap;
  85         unsigned long   iommu_size;
  86         unsigned long   iommu_pages;
  87         unsigned int    next_bit;
  88
  89         struct zpci_bar_struct bars[PCI_BAR_COUNT];
  90
  91         u64             start_dma;      /* Start of available DMA addresses */
  92         u64             end_dma;        /* End of available DMA addresses */
  93         u64             dma_mask;       /* DMA address space mask */
  94
  95         enum pci_bus_speed max_bus_speed;
  96 };
  97
  98 struct pci_hp_callback_ops {
  99         int (*create_slot)      (struct zpci_dev *zdev);
 100         void (*remove_slot)     (struct zpci_dev *zdev);
 101 };
 102
 103 static inline bool zdev_enabled(struct zpci_dev *zdev)
 104 {
 105         return (zdev->fh & (1UL << 31)) ? true : false;
 106 }
 107
 108 /* -----------------------------------------------------------------------------
 109   Prototypes
 110 ----------------------------------------------------------------------------- */
 111 /* Base stuff */
 112 struct zpci_dev *zpci_alloc_device(void);
 113 int zpci_create_device(struct zpci_dev *);
 114 int zpci_enable_device(struct zpci_dev *);
 115 void zpci_stop_device(struct zpci_dev *);
 116 void zpci_free_device(struct zpci_dev *);
 117 int zpci_scan_device(struct zpci_dev *);
 118 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 119 int zpci_unregister_ioat(struct zpci_dev *, u8);
 120
 121 /* CLP */
 122 int clp_find_pci_devices(void);
 123 int clp_add_pci_device(u32, u32, int);
 124 int clp_enable_fh(struct zpci_dev *, u8);
 125 int clp_disable_fh(struct zpci_dev *);
 126
 127 /* MSI */
 128 struct msi_desc *__irq_get_msi_desc(unsigned int);
 129 int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32);
 130 int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int);
 131 void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *);
 132 int zpci_msihash_init(void);
 133 void zpci_msihash_exit(void);
 134
 135 /* Error handling and recovery */
 136 void zpci_event_error(void *);
 137 void zpci_event_availability(void *);
 138
 139 /* Helpers */
 140 struct zpci_dev *get_zdev(struct pci_dev *);
 141 struct zpci_dev *get_zdev_by_fid(u32);
 142 bool zpci_fid_present(u32);
 143
 144 /* sysfs */
 145 int zpci_sysfs_add_device(struct device *);
 146 void zpci_sysfs_remove_device(struct device *);
 147
 148 /* DMA */
 149 int zpci_dma_init(void);
 150 void zpci_dma_exit(void);
 151
 152 /* Hotplug */
 153 extern struct mutex zpci_list_lock;
 154 extern struct list_head zpci_list;
 155 extern struct pci_hp_callback_ops hotplug_ops;
 156 extern unsigned int pci_probe;
 157
 158 #endif