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 <linux/mutex.h>
  11 #include <asm-generic/pci.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 } __packed __aligned(64);
  48
  49 enum zpci_state {
  50         ZPCI_FN_STATE_RESERVED,
  51         ZPCI_FN_STATE_STANDBY,
  52         ZPCI_FN_STATE_CONFIGURED,
  53         ZPCI_FN_STATE_ONLINE,
  54         NR_ZPCI_FN_STATES,
  55 };
  56
  57 struct zpci_bar_struct {
  58         struct resource *res;           /* bus resource */
  59         u32             val;            /* bar start & 3 flag bits */
  60         u16             map_idx;        /* index into bar mapping array */
  61         u8              size;           /* order 2 exponent */
  62 };
  63
  64 struct s390_domain;
  65
  66 /* Private data per function */
  67 struct zpci_dev {
  68         struct pci_bus  *bus;
  69         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  70
  71         enum zpci_state state;
  72         u32             fid;            /* function ID, used by sclp */
  73         u32             fh;             /* function handle, used by insn's */
  74         u16             vfn;            /* virtual function number */
  75         u16             pchid;          /* physical channel ID */
  76         u8              pfgid;          /* function group ID */
  77         u8              pft;            /* pci function type */
  78         u16             domain;
  79
  80         struct mutex lock;
  81         u8 pfip[CLP_PFIP_NR_SEGMENTS];  /* pci function internal path */
  82         u32 uid;                        /* user defined id */
  83         u8 util_str[CLP_UTIL_STR_LEN];  /* utility string */
  84
  85         /* IRQ stuff */
  86         u64             msi_addr;       /* MSI address */
  87         unsigned int    max_msi;        /* maximum number of MSI's */
  88         struct airq_iv *aibv;           /* adapter interrupt bit vector */
  89         unsigned int    aisb;           /* number of the summary bit */
  90
  91         /* DMA stuff */
  92         unsigned long   *dma_table;
  93         spinlock_t      dma_table_lock;
  94         int             tlb_refresh;
  95
  96         spinlock_t      iommu_bitmap_lock;
  97         unsigned long   *iommu_bitmap;
  98         unsigned long   iommu_size;
  99         unsigned long   iommu_pages;
 100         unsigned int    next_bit;
 101
 102         char res_name[16];
 103         struct zpci_bar_struct bars[PCI_BAR_COUNT];
 104
 105         u64             start_dma;      /* Start of available DMA addresses */
 106         u64             end_dma;        /* End of available DMA addresses */
 107         u64             dma_mask;       /* DMA address space mask */
 108
 109         /* Function measurement block */
 110         struct zpci_fmb *fmb;
 111         u16             fmb_update;     /* update interval */
 112         /* software counters */
 113         atomic64_t allocated_pages;
 114         atomic64_t mapped_pages;
 115         atomic64_t unmapped_pages;
 116
 117         enum pci_bus_speed max_bus_speed;
 118
 119         struct dentry   *debugfs_dev;
 120         struct dentry   *debugfs_perf;
 121
 122         struct s390_domain *s390_domain; /* s390 IOMMU domain data */
 123 };
 124
 125 static inline bool zdev_enabled(struct zpci_dev *zdev)
 126 {
 127         return (zdev->fh & (1UL << 31)) ? true : false;
 128 }
 129
 130 extern const struct attribute_group *zpci_attr_groups[];
 131
 132 /* -----------------------------------------------------------------------------
 133   Prototypes
 134 ----------------------------------------------------------------------------- */
 135 /* Base stuff */
 136 int zpci_create_device(struct zpci_dev *);
 137 int zpci_enable_device(struct zpci_dev *);
 138 int zpci_disable_device(struct zpci_dev *);
 139 void zpci_stop_device(struct zpci_dev *);
 140 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 141 int zpci_unregister_ioat(struct zpci_dev *, u8);
 142
 143 /* CLP */
 144 int clp_scan_pci_devices(void);
 145 int clp_rescan_pci_devices(void);
 146 int clp_rescan_pci_devices_simple(void);
 147 int clp_add_pci_device(u32, u32, int);
 148 int clp_enable_fh(struct zpci_dev *, u8);
 149 int clp_disable_fh(struct zpci_dev *);
 150
 151 #ifdef CONFIG_PCI
 152 /* Error handling and recovery */
 153 void zpci_event_error(void *);
 154 void zpci_event_availability(void *);
 155 void zpci_rescan(void);
 156 bool zpci_is_enabled(void);
 157 #else /* CONFIG_PCI */
 158 static inline void zpci_event_error(void *e) {}
 159 static inline void zpci_event_availability(void *e) {}
 160 static inline void zpci_rescan(void) {}
 161 #endif /* CONFIG_PCI */
 162
 163 #ifdef CONFIG_HOTPLUG_PCI_S390
 164 int zpci_init_slot(struct zpci_dev *);
 165 void zpci_exit_slot(struct zpci_dev *);
 166 #else /* CONFIG_HOTPLUG_PCI_S390 */
 167 static inline int zpci_init_slot(struct zpci_dev *zdev)
 168 {
 169         return 0;
 170 }
 171 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 172 #endif /* CONFIG_HOTPLUG_PCI_S390 */
 173
 174 /* Helpers */
 175 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
 176 {
 177         return pdev->sysdata;
 178 }
 179
 180 struct zpci_dev *get_zdev_by_fid(u32);
 181
 182 /* DMA */
 183 int zpci_dma_init(void);
 184 void zpci_dma_exit(void);
 185
 186 /* FMB */
 187 int zpci_fmb_enable_device(struct zpci_dev *);
 188 int zpci_fmb_disable_device(struct zpci_dev *);
 189
 190 /* Debug */
 191 int zpci_debug_init(void);
 192 void zpci_debug_exit(void);
 193 void zpci_debug_init_device(struct zpci_dev *, const char *);
 194 void zpci_debug_exit_device(struct zpci_dev *);
 195 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 196
 197 #ifdef CONFIG_NUMA
 198
 199 /* Returns the node based on PCI bus */
 200 static inline int __pcibus_to_node(const struct pci_bus *bus)
 201 {
 202         return NUMA_NO_NODE;
 203 }
 204
 205 static inline const struct cpumask *
 206 cpumask_of_pcibus(const struct pci_bus *bus)
 207 {
 208         return cpu_online_mask;
 209 }
 210
 211 #endif /* CONFIG_NUMA */
 212
 213 #endif