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 /* MSI arch hooks */
  26 #define arch_setup_msi_irqs     arch_setup_msi_irqs
  27 #define arch_teardown_msi_irqs  arch_teardown_msi_irqs
  28
  29 #define ZPCI_BUS_NR                     0       /* default bus number */
  30 #define ZPCI_DEVFN                      0       /* default device number */
  31
  32 /* PCI Function Controls */
  33 #define ZPCI_FC_FN_ENABLED              0x80
  34 #define ZPCI_FC_ERROR                   0x40
  35 #define ZPCI_FC_BLOCKED                 0x20
  36 #define ZPCI_FC_DMA_ENABLED             0x10
  37
  38 struct zpci_fmb {
  39         u32 format      :  8;
  40         u32 dma_valid   :  1;
  41         u32             : 23;
  42         u32 samples;
  43         u64 last_update;
  44         /* hardware counters */
  45         u64 ld_ops;
  46         u64 st_ops;
  47         u64 stb_ops;
  48         u64 rpcit_ops;
  49         u64 dma_rbytes;
  50         u64 dma_wbytes;
  51         /* software counters */
  52         atomic64_t allocated_pages;
  53         atomic64_t mapped_pages;
  54         atomic64_t unmapped_pages;
  55 } __packed __aligned(16);
  56
  57 #define ZPCI_MSI_VEC_BITS       11
  58 #define ZPCI_MSI_VEC_MAX        (1 << ZPCI_MSI_VEC_BITS)
  59 #define ZPCI_MSI_VEC_MASK       (ZPCI_MSI_VEC_MAX - 1)
  60
  61 enum zpci_state {
  62         ZPCI_FN_STATE_RESERVED,
  63         ZPCI_FN_STATE_STANDBY,
  64         ZPCI_FN_STATE_CONFIGURED,
  65         ZPCI_FN_STATE_ONLINE,
  66         NR_ZPCI_FN_STATES,
  67 };
  68
  69 struct zpci_bar_struct {
  70         u32             val;            /* bar start & 3 flag bits */
  71         u8              size;           /* order 2 exponent */
  72         u16             map_idx;        /* index into bar mapping array */
  73 };
  74
  75 /* Private data per function */
  76 struct zpci_dev {
  77         struct pci_dev  *pdev;
  78         struct pci_bus  *bus;
  79         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  80
  81         enum zpci_state state;
  82         u32             fid;            /* function ID, used by sclp */
  83         u32             fh;             /* function handle, used by insn's */
  84         u16             pchid;          /* physical channel ID */
  85         u8              pfgid;          /* function group ID */
  86         u16             domain;
  87
  88         /* IRQ stuff */
  89         u64             msi_addr;       /* MSI address */
  90         struct airq_iv *aibv;           /* adapter interrupt bit vector */
  91         unsigned int    aisb;           /* number of the summary bit */
  92
  93         /* DMA stuff */
  94         unsigned long   *dma_table;
  95         spinlock_t      dma_table_lock;
  96         int             tlb_refresh;
  97
  98         spinlock_t      iommu_bitmap_lock;
  99         unsigned long   *iommu_bitmap;
 100         unsigned long   iommu_size;
 101         unsigned long   iommu_pages;
 102         unsigned int    next_bit;
 103
 104         struct zpci_bar_struct bars[PCI_BAR_COUNT];
 105
 106         u64             start_dma;      /* Start of available DMA addresses */
 107         u64             end_dma;        /* End of available DMA addresses */
 108         u64             dma_mask;       /* DMA address space mask */
 109
 110         /* Function measurement block */
 111         struct zpci_fmb *fmb;
 112         u16             fmb_update;     /* update interval */
 113
 114         enum pci_bus_speed max_bus_speed;
 115
 116         struct dentry   *debugfs_dev;
 117         struct dentry   *debugfs_perf;
 118 };
 119
 120 static inline bool zdev_enabled(struct zpci_dev *zdev)
 121 {
 122         return (zdev->fh & (1UL << 31)) ? true : false;
 123 }
 124
 125 /* -----------------------------------------------------------------------------
 126   Prototypes
 127 ----------------------------------------------------------------------------- */
 128 /* Base stuff */
 129 struct zpci_dev *zpci_alloc_device(void);
 130 int zpci_create_device(struct zpci_dev *);
 131 int zpci_enable_device(struct zpci_dev *);
 132 int zpci_disable_device(struct zpci_dev *);
 133 void zpci_stop_device(struct zpci_dev *);
 134 void zpci_free_device(struct zpci_dev *);
 135 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 136 int zpci_unregister_ioat(struct zpci_dev *, u8);
 137
 138 /* CLP */
 139 int clp_scan_pci_devices(void);
 140 int clp_rescan_pci_devices(void);
 141 int clp_rescan_pci_devices_simple(void);
 142 int clp_add_pci_device(u32, u32, int);
 143 int clp_enable_fh(struct zpci_dev *, u8);
 144 int clp_disable_fh(struct zpci_dev *);
 145
 146 #ifdef CONFIG_PCI
 147 /* Error handling and recovery */
 148 void zpci_event_error(void *);
 149 void zpci_event_availability(void *);
 150 void zpci_rescan(void);
 151 #else /* CONFIG_PCI */
 152 static inline void zpci_event_error(void *e) {}
 153 static inline void zpci_event_availability(void *e) {}
 154 static inline void zpci_rescan(void) {}
 155 #endif /* CONFIG_PCI */
 156
 157 #ifdef CONFIG_HOTPLUG_PCI_S390
 158 int zpci_init_slot(struct zpci_dev *);
 159 void zpci_exit_slot(struct zpci_dev *);
 160 #else /* CONFIG_HOTPLUG_PCI_S390 */
 161 static inline int zpci_init_slot(struct zpci_dev *zdev)
 162 {
 163         return 0;
 164 }
 165 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 166 #endif /* CONFIG_HOTPLUG_PCI_S390 */
 167
 168 /* Helpers */
 169 struct zpci_dev *get_zdev(struct pci_dev *);
 170 struct zpci_dev *get_zdev_by_fid(u32);
 171
 172 /* sysfs */
 173 int zpci_sysfs_add_device(struct device *);
 174 void zpci_sysfs_remove_device(struct device *);
 175
 176 /* DMA */
 177 int zpci_dma_init(void);
 178 void zpci_dma_exit(void);
 179
 180 /* FMB */
 181 int zpci_fmb_enable_device(struct zpci_dev *);
 182 int zpci_fmb_disable_device(struct zpci_dev *);
 183
 184 /* Debug */
 185 int zpci_debug_init(void);
 186 void zpci_debug_exit(void);
 187 void zpci_debug_init_device(struct zpci_dev *);
 188 void zpci_debug_exit_device(struct zpci_dev *);
 189 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 190
 191 #endif