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 #include <asm/sclp.h>
  15
  16 #define PCIBIOS_MIN_IO          0x1000
  17 #define PCIBIOS_MIN_MEM         0x10000000
  18
  19 #define pcibios_assign_all_busses()     (0)
  20
  21 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
  22 void pci_iounmap(struct pci_dev *, void __iomem *);
  23 int pci_domain_nr(struct pci_bus *);
  24 int pci_proc_domain(struct pci_bus *);
  25
  26 #define ZPCI_BUS_NR                     0       /* default bus number */
  27 #define ZPCI_DEVFN                      0       /* default device number */
  28
  29 /* PCI Function Controls */
  30 #define ZPCI_FC_FN_ENABLED              0x80
  31 #define ZPCI_FC_ERROR                   0x40
  32 #define ZPCI_FC_BLOCKED                 0x20
  33 #define ZPCI_FC_DMA_ENABLED             0x10
  34
  35 #define ZPCI_FMB_DMA_COUNTER_VALID      (1 << 23)
  36
  37 struct zpci_fmb_fmt0 {
  38         u64 dma_rbytes;
  39         u64 dma_wbytes;
  40 };
  41
  42 struct zpci_fmb_fmt1 {
  43         u64 rx_bytes;
  44         u64 rx_packets;
  45         u64 tx_bytes;
  46         u64 tx_packets;
  47 };
  48
  49 struct zpci_fmb_fmt2 {
  50         u64 consumed_work_units;
  51         u64 max_work_units;
  52 };
  53
  54 struct zpci_fmb {
  55         u32 format      : 8;
  56         u32 fmt_ind     : 24;
  57         u32 samples;
  58         u64 last_update;
  59         /* common counters */
  60         u64 ld_ops;
  61         u64 st_ops;
  62         u64 stb_ops;
  63         u64 rpcit_ops;
  64         /* format specific counters */
  65         union {
  66                 struct zpci_fmb_fmt0 fmt0;
  67                 struct zpci_fmb_fmt1 fmt1;
  68                 struct zpci_fmb_fmt2 fmt2;
  69         };
  70 } __packed __aligned(128);
  71
  72 enum zpci_state {
  73         ZPCI_FN_STATE_RESERVED,
  74         ZPCI_FN_STATE_STANDBY,
  75         ZPCI_FN_STATE_CONFIGURED,
  76         ZPCI_FN_STATE_ONLINE,
  77         NR_ZPCI_FN_STATES,
  78 };
  79
  80 struct zpci_bar_struct {
  81         struct resource *res;           /* bus resource */
  82         u32             val;            /* bar start & 3 flag bits */
  83         u16             map_idx;        /* index into bar mapping array */
  84         u8              size;           /* order 2 exponent */
  85 };
  86
  87 struct s390_domain;
  88
  89 /* Private data per function */
  90 struct zpci_dev {
  91         struct pci_bus  *bus;
  92         struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  93
  94         enum zpci_state state;
  95         u32             fid;            /* function ID, used by sclp */
  96         u32             fh;             /* function handle, used by insn's */
  97         u16             vfn;            /* virtual function number */
  98         u16             pchid;          /* physical channel ID */
  99         u8              pfgid;          /* function group ID */
 100         u8              pft;            /* pci function type */
 101         u16             domain;
 102
 103         struct mutex lock;
 104         u8 pfip[CLP_PFIP_NR_SEGMENTS];  /* pci function internal path */
 105         u32 uid;                        /* user defined id */
 106         u8 util_str[CLP_UTIL_STR_LEN];  /* utility string */
 107
 108         /* IRQ stuff */
 109         u64             msi_addr;       /* MSI address */
 110         unsigned int    max_msi;        /* maximum number of MSI's */
 111         struct airq_iv *aibv;           /* adapter interrupt bit vector */
 112         unsigned int    aisb;           /* number of the summary bit */
 113
 114         /* DMA stuff */
 115         unsigned long   *dma_table;
 116         spinlock_t      dma_table_lock;
 117         int             tlb_refresh;
 118
 119         spinlock_t      iommu_bitmap_lock;
 120         unsigned long   *iommu_bitmap;
 121         unsigned long   iommu_size;
 122         unsigned long   iommu_pages;
 123         unsigned int    next_bit;
 124
 125         char res_name[16];
 126         struct zpci_bar_struct bars[PCI_BAR_COUNT];
 127
 128         u64             start_dma;      /* Start of available DMA addresses */
 129         u64             end_dma;        /* End of available DMA addresses */
 130         u64             dma_mask;       /* DMA address space mask */
 131
 132         /* Function measurement block */
 133         struct zpci_fmb *fmb;
 134         u16             fmb_update;     /* update interval */
 135         /* software counters */
 136         atomic64_t allocated_pages;
 137         atomic64_t mapped_pages;
 138         atomic64_t unmapped_pages;
 139
 140         enum pci_bus_speed max_bus_speed;
 141
 142         struct dentry   *debugfs_dev;
 143         struct dentry   *debugfs_perf;
 144
 145         struct s390_domain *s390_domain; /* s390 IOMMU domain data */
 146 };
 147
 148 static inline bool zdev_enabled(struct zpci_dev *zdev)
 149 {
 150         return (zdev->fh & (1UL << 31)) ? true : false;
 151 }
 152
 153 extern const struct attribute_group *zpci_attr_groups[];
 154
 155 /* -----------------------------------------------------------------------------
 156   Prototypes
 157 ----------------------------------------------------------------------------- */
 158 /* Base stuff */
 159 int zpci_create_device(struct zpci_dev *);
 160 int zpci_enable_device(struct zpci_dev *);
 161 int zpci_disable_device(struct zpci_dev *);
 162 void zpci_stop_device(struct zpci_dev *);
 163 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 164 int zpci_unregister_ioat(struct zpci_dev *, u8);
 165
 166 /* CLP */
 167 int clp_scan_pci_devices(void);
 168 int clp_rescan_pci_devices(void);
 169 int clp_rescan_pci_devices_simple(void);
 170 int clp_add_pci_device(u32, u32, int);
 171 int clp_enable_fh(struct zpci_dev *, u8);
 172 int clp_disable_fh(struct zpci_dev *);
 173
 174 #ifdef CONFIG_PCI
 175 /* Error handling and recovery */
 176 void zpci_event_error(void *);
 177 void zpci_event_availability(void *);
 178 void zpci_rescan(void);
 179 bool zpci_is_enabled(void);
 180 #else /* CONFIG_PCI */
 181 static inline void zpci_event_error(void *e) {}
 182 static inline void zpci_event_availability(void *e) {}
 183 static inline void zpci_rescan(void) {}
 184 #endif /* CONFIG_PCI */
 185
 186 #ifdef CONFIG_HOTPLUG_PCI_S390
 187 int zpci_init_slot(struct zpci_dev *);
 188 void zpci_exit_slot(struct zpci_dev *);
 189 #else /* CONFIG_HOTPLUG_PCI_S390 */
 190 static inline int zpci_init_slot(struct zpci_dev *zdev)
 191 {
 192         return 0;
 193 }
 194 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 195 #endif /* CONFIG_HOTPLUG_PCI_S390 */
 196
 197 /* Helpers */
 198 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
 199 {
 200         return pdev->sysdata;
 201 }
 202
 203 struct zpci_dev *get_zdev_by_fid(u32);
 204
 205 /* DMA */
 206 int zpci_dma_init(void);
 207 void zpci_dma_exit(void);
 208
 209 /* FMB */
 210 int zpci_fmb_enable_device(struct zpci_dev *);
 211 int zpci_fmb_disable_device(struct zpci_dev *);
 212
 213 /* Debug */
 214 int zpci_debug_init(void);
 215 void zpci_debug_exit(void);
 216 void zpci_debug_init_device(struct zpci_dev *, const char *);
 217 void zpci_debug_exit_device(struct zpci_dev *);
 218 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 219
 220 /* Error reporting */
 221 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
 222
 223 #ifdef CONFIG_NUMA
 224
 225 /* Returns the node based on PCI bus */
 226 static inline int __pcibus_to_node(const struct pci_bus *bus)
 227 {
 228         return NUMA_NO_NODE;
 229 }
 230
 231 static inline const struct cpumask *
 232 cpumask_of_pcibus(const struct pci_bus *bus)
 233 {
 234         return cpu_online_mask;
 235 }
 236
 237 #endif /* CONFIG_NUMA */
 238
 239 #endif