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 <linux/pci.h>
  10 #include <asm-generic/pci.h>
  11 #include <asm-generic/pci-dma-compat.h>
  12 #include <asm/pci_clp.h>
  13 #include <asm/pci_debug.h>
  14
  15 #define PCIBIOS_MIN_IO          0x1000
  16 #define PCIBIOS_MIN_MEM         0x10000000
  17
  18 #define pcibios_assign_all_busses()     (0)
  19
  20 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
  21 void pci_iounmap(struct pci_dev *, void __iomem *);
  22 int pci_domain_nr(struct pci_bus *);
  23 int pci_proc_domain(struct pci_bus *);
  24
  25 #define ZPCI_BUS_NR                     0       /* default bus number */
  26 #define ZPCI_DEVFN                      0       /* default device number */
  27
  28 /* PCI Function Controls */
  29 #define ZPCI_FC_FN_ENABLED              0x80
  30 #define ZPCI_FC_ERROR                   0x40
  31 #define ZPCI_FC_BLOCKED                 0x20
  32 #define ZPCI_FC_DMA_ENABLED             0x10
  33
  34 struct zpci_fmb {
  35         u32 format      :  8;
  36         u32 dma_valid   :  1;
  37         u32             : 23;
  38         u32 samples;
  39         u64 last_update;
  40         /* hardware counters */
  41         u64 ld_ops;
  42         u64 st_ops;
  43         u64 stb_ops;
  44         u64 rpcit_ops;
  45         u64 dma_rbytes;
  46         u64 dma_wbytes;
  47         /* software counters */
  48         atomic64_t allocated_pages;
  49         atomic64_t mapped_pages;
  50         atomic64_t unmapped_pages;
  51 } __packed __aligned(16);
  52
  53 #define ZPCI_MSI_VEC_BITS       11
  54 #define ZPCI_MSI_VEC_MAX        (1 << ZPCI_MSI_VEC_BITS)
  55 #define ZPCI_MSI_VEC_MASK       (ZPCI_MSI_VEC_MAX - 1)
  56
  57 enum zpci_state {
  58         ZPCI_FN_STATE_RESERVED,
  59         ZPCI_FN_STATE_STANDBY,
  60         ZPCI_FN_STATE_CONFIGURED,
  61         ZPCI_FN_STATE_ONLINE,
  62         NR_ZPCI_FN_STATES,
  63 };
  64
  65 struct zpci_bar_struct {
  66         struct resource *res;           /* bus resource */
  67         u32             val;            /* bar start & 3 flag bits */
  68         u16             map_idx;        /* index into bar mapping array */
  69         u8              size;           /* order 2 exponent */
  70 };
  71
  72 /* Private data per function */
  73 struct zpci_dev {
  74         struct pci_dev  *pdev;
  75         struct pci_bus  *bus;
  76         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  77
  78         enum zpci_state state;
  79         u32             fid;            /* function ID, used by sclp */
  80         u32             fh;             /* function handle, used by insn's */
  81         u16             pchid;          /* physical channel ID */
  82         u8              pfgid;          /* function group ID */
  83         u16             domain;
  84
  85         /* IRQ stuff */
  86         u64             msi_addr;       /* MSI address */
  87         struct airq_iv *aibv;           /* adapter interrupt bit vector */
  88         unsigned int    aisb;           /* number of the summary bit */
  89
  90         /* DMA stuff */
  91         unsigned long   *dma_table;
  92         spinlock_t      dma_table_lock;
  93         int             tlb_refresh;
  94
  95         spinlock_t      iommu_bitmap_lock;
  96         unsigned long   *iommu_bitmap;
  97         unsigned long   iommu_size;
  98         unsigned long   iommu_pages;
  99         unsigned int    next_bit;
 100
 101         char res_name[16];
 102         struct zpci_bar_struct bars[PCI_BAR_COUNT];
 103
 104         u64             start_dma;      /* Start of available DMA addresses */
 105         u64             end_dma;        /* End of available DMA addresses */
 106         u64             dma_mask;       /* DMA address space mask */
 107
 108         /* Function measurement block */
 109         struct zpci_fmb *fmb;
 110         u16             fmb_update;     /* update interval */
 111
 112         enum pci_bus_speed max_bus_speed;
 113
 114         struct dentry   *debugfs_dev;
 115         struct dentry   *debugfs_perf;
 116 };
 117
 118 static inline bool zdev_enabled(struct zpci_dev *zdev)
 119 {
 120         return (zdev->fh & (1UL << 31)) ? true : false;
 121 }
 122
 123 /* -----------------------------------------------------------------------------
 124   Prototypes
 125 ----------------------------------------------------------------------------- */
 126 /* Base stuff */
 127 struct zpci_dev *zpci_alloc_device(void);
 128 int zpci_create_device(struct zpci_dev *);
 129 int zpci_enable_device(struct zpci_dev *);
 130 int zpci_disable_device(struct zpci_dev *);
 131 void zpci_stop_device(struct zpci_dev *);
 132 void zpci_free_device(struct zpci_dev *);
 133 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 134 int zpci_unregister_ioat(struct zpci_dev *, u8);
 135
 136 /* CLP */
 137 int clp_scan_pci_devices(void);
 138 int clp_rescan_pci_devices(void);
 139 int clp_rescan_pci_devices_simple(void);
 140 int clp_add_pci_device(u32, u32, int);
 141 int clp_enable_fh(struct zpci_dev *, u8);
 142 int clp_disable_fh(struct zpci_dev *);
 143
 144 #ifdef CONFIG_PCI
 145 /* Error handling and recovery */
 146 void zpci_event_error(void *);
 147 void zpci_event_availability(void *);
 148 void zpci_rescan(void);
 149 #else /* CONFIG_PCI */
 150 static inline void zpci_event_error(void *e) {}
 151 static inline void zpci_event_availability(void *e) {}
 152 static inline void zpci_rescan(void) {}
 153 #endif /* CONFIG_PCI */
 154
 155 #ifdef CONFIG_HOTPLUG_PCI_S390
 156 int zpci_init_slot(struct zpci_dev *);
 157 void zpci_exit_slot(struct zpci_dev *);
 158 #else /* CONFIG_HOTPLUG_PCI_S390 */
 159 static inline int zpci_init_slot(struct zpci_dev *zdev)
 160 {
 161         return 0;
 162 }
 163 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 164 #endif /* CONFIG_HOTPLUG_PCI_S390 */
 165
 166 /* Helpers */
 167 struct zpci_dev *get_zdev(struct pci_dev *);
 168 struct zpci_dev *get_zdev_by_fid(u32);
 169
 170 /* sysfs */
 171 int zpci_sysfs_add_device(struct device *);
 172 void zpci_sysfs_remove_device(struct device *);
 173
 174 /* DMA */
 175 int zpci_dma_init(void);
 176 void zpci_dma_exit(void);
 177
 178 /* FMB */
 179 int zpci_fmb_enable_device(struct zpci_dev *);
 180 int zpci_fmb_disable_device(struct zpci_dev *);
 181
 182 /* Debug */
 183 int zpci_debug_init(void);
 184 void zpci_debug_exit(void);
 185 void zpci_debug_init_device(struct zpci_dev *);
 186 void zpci_debug_exit_device(struct zpci_dev *);
 187 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 188
 189 #endif