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             vfn;            /* virtual function number */
  82         u16             pchid;          /* physical channel ID */
  83         u8              pfgid;          /* function group ID */
  84         u8              pft;            /* pci function type */
  85         u16             domain;
  86
  87         u8 pfip[CLP_PFIP_NR_SEGMENTS];  /* pci function internal path */
  88         u32 uid;                        /* user defined id */
  89         u8 util_str[CLP_UTIL_STR_LEN];  /* utility string */
  90
  91         /* IRQ stuff */
  92         u64             msi_addr;       /* MSI address */
  93         struct airq_iv *aibv;           /* adapter interrupt bit vector */
  94         unsigned int    aisb;           /* number of the summary bit */
  95
  96         /* DMA stuff */
  97         unsigned long   *dma_table;
  98         spinlock_t      dma_table_lock;
  99         int             tlb_refresh;
 100
 101         spinlock_t      iommu_bitmap_lock;
 102         unsigned long   *iommu_bitmap;
 103         unsigned long   iommu_size;
 104         unsigned long   iommu_pages;
 105         unsigned int    next_bit;
 106
 107         char res_name[16];
 108         struct zpci_bar_struct bars[PCI_BAR_COUNT];
 109
 110         u64             start_dma;      /* Start of available DMA addresses */
 111         u64             end_dma;        /* End of available DMA addresses */
 112         u64             dma_mask;       /* DMA address space mask */
 113
 114         /* Function measurement block */
 115         struct zpci_fmb *fmb;
 116         u16             fmb_update;     /* update interval */
 117
 118         enum pci_bus_speed max_bus_speed;
 119
 120         struct dentry   *debugfs_dev;
 121         struct dentry   *debugfs_perf;
 122 };
 123
 124 static inline bool zdev_enabled(struct zpci_dev *zdev)
 125 {
 126         return (zdev->fh & (1UL << 31)) ? true : false;
 127 }
 128
 129 extern const struct attribute_group *zpci_attr_groups[];
 130
 131 /* -----------------------------------------------------------------------------
 132   Prototypes
 133 ----------------------------------------------------------------------------- */
 134 /* Base stuff */
 135 int zpci_create_device(struct zpci_dev *);
 136 int zpci_enable_device(struct zpci_dev *);
 137 int zpci_disable_device(struct zpci_dev *);
 138 void zpci_stop_device(struct zpci_dev *);
 139 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 140 int zpci_unregister_ioat(struct zpci_dev *, u8);
 141
 142 /* CLP */
 143 int clp_scan_pci_devices(void);
 144 int clp_rescan_pci_devices(void);
 145 int clp_rescan_pci_devices_simple(void);
 146 int clp_add_pci_device(u32, u32, int);
 147 int clp_enable_fh(struct zpci_dev *, u8);
 148 int clp_disable_fh(struct zpci_dev *);
 149
 150 #ifdef CONFIG_PCI
 151 /* Error handling and recovery */
 152 void zpci_event_error(void *);
 153 void zpci_event_availability(void *);
 154 void zpci_rescan(void);
 155 bool zpci_is_enabled(void);
 156 #else /* CONFIG_PCI */
 157 static inline void zpci_event_error(void *e) {}
 158 static inline void zpci_event_availability(void *e) {}
 159 static inline void zpci_rescan(void) {}
 160 #endif /* CONFIG_PCI */
 161
 162 #ifdef CONFIG_HOTPLUG_PCI_S390
 163 int zpci_init_slot(struct zpci_dev *);
 164 void zpci_exit_slot(struct zpci_dev *);
 165 #else /* CONFIG_HOTPLUG_PCI_S390 */
 166 static inline int zpci_init_slot(struct zpci_dev *zdev)
 167 {
 168         return 0;
 169 }
 170 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 171 #endif /* CONFIG_HOTPLUG_PCI_S390 */
 172
 173 /* Helpers */
 174 struct zpci_dev *get_zdev(struct pci_dev *);
 175 struct zpci_dev *get_zdev_by_fid(u32);
 176
 177 /* DMA */
 178 int zpci_dma_init(void);
 179 void zpci_dma_exit(void);
 180
 181 /* FMB */
 182 int zpci_fmb_enable_device(struct zpci_dev *);
 183 int zpci_fmb_disable_device(struct zpci_dev *);
 184
 185 /* Debug */
 186 int zpci_debug_init(void);
 187 void zpci_debug_exit(void);
 188 void zpci_debug_init_device(struct zpci_dev *);
 189 void zpci_debug_exit_device(struct zpci_dev *);
 190 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 191
 192 #endif