LXR linux/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
  20void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
  21void pci_iounmap(struct pci_dev *, void __iomem *);
  22int pci_domain_nr(struct pci_bus *);
  23int 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
  34struct 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        u64 pad[2];
  48} __packed __aligned(128);
  49
  50enum zpci_state {
  51        ZPCI_FN_STATE_RESERVED,
  52        ZPCI_FN_STATE_STANDBY,
  53        ZPCI_FN_STATE_CONFIGURED,
  54        ZPCI_FN_STATE_ONLINE,
  55        NR_ZPCI_FN_STATES,
  56};
  57
  58struct zpci_bar_struct {
  59        struct resource *res;           /* bus resource */
  60        u32             val;            /* bar start & 3 flag bits */
  61        u16             map_idx;        /* index into bar mapping array */
  62        u8              size;           /* order 2 exponent */
  63};
  64
  65struct s390_domain;
  66
  67/* Private data per function */
  68struct zpci_dev {
  69        struct pci_bus  *bus;
  70        struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  71
  72        enum zpci_state state;
  73        u32             fid;            /* function ID, used by sclp */
  74        u32             fh;             /* function handle, used by insn's */
  75        u16             vfn;            /* virtual function number */
  76        u16             pchid;          /* physical channel ID */
  77        u8              pfgid;          /* function group ID */
  78        u8              pft;            /* pci function type */
  79        u16             domain;
  80
  81        struct mutex lock;
  82        u8 pfip[CLP_PFIP_NR_SEGMENTS];  /* pci function internal path */
  83        u32 uid;                        /* user defined id */
  84        u8 util_str[CLP_UTIL_STR_LEN];  /* utility string */
  85
  86        /* IRQ stuff */
  87        u64             msi_addr;       /* MSI address */
  88        unsigned int    max_msi;        /* maximum number of MSI's */
  89        struct airq_iv *aibv;           /* adapter interrupt bit vector */
  90        unsigned int    aisb;           /* number of the summary bit */
  91
  92        /* DMA stuff */
  93        unsigned long   *dma_table;
  94        spinlock_t      dma_table_lock;
  95        int             tlb_refresh;
  96
  97        spinlock_t      iommu_bitmap_lock;
  98        unsigned long   *iommu_bitmap;
  99        unsigned long   iommu_size;
 100        unsigned long   iommu_pages;
 101        unsigned int    next_bit;
 102
 103        char res_name[16];
 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        /* software counters */
 114        atomic64_t allocated_pages;
 115        atomic64_t mapped_pages;
 116        atomic64_t unmapped_pages;
 117
 118        enum pci_bus_speed max_bus_speed;
 119
 120        struct dentry   *debugfs_dev;
 121        struct dentry   *debugfs_perf;
 122
 123        struct s390_domain *s390_domain; /* s390 IOMMU domain data */
 124};
 125
 126static inline bool zdev_enabled(struct zpci_dev *zdev)
 127{
 128        return (zdev->fh & (1UL << 31)) ? true : false;
 129}
 130
 131extern const struct attribute_group *zpci_attr_groups[];
 132
 133/* -----------------------------------------------------------------------------
 134  Prototypes
 135----------------------------------------------------------------------------- */
 136/* Base stuff */
 137int zpci_create_device(struct zpci_dev *);
 138int zpci_enable_device(struct zpci_dev *);
 139int zpci_disable_device(struct zpci_dev *);
 140void zpci_stop_device(struct zpci_dev *);
 141int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 142int zpci_unregister_ioat(struct zpci_dev *, u8);
 143
 144/* CLP */
 145int clp_scan_pci_devices(void);
 146int clp_rescan_pci_devices(void);
 147int clp_rescan_pci_devices_simple(void);
 148int clp_add_pci_device(u32, u32, int);
 149int clp_enable_fh(struct zpci_dev *, u8);
 150int clp_disable_fh(struct zpci_dev *);
 151
 152#ifdef CONFIG_PCI
 153/* Error handling and recovery */
 154void zpci_event_error(void *);
 155void zpci_event_availability(void *);
 156void zpci_rescan(void);
 157bool zpci_is_enabled(void);
 158#else /* CONFIG_PCI */
 159static inline void zpci_event_error(void *e) {}
 160static inline void zpci_event_availability(void *e) {}
 161static inline void zpci_rescan(void) {}
 162#endif /* CONFIG_PCI */
 163
 164#ifdef CONFIG_HOTPLUG_PCI_S390
 165int zpci_init_slot(struct zpci_dev *);
 166void zpci_exit_slot(struct zpci_dev *);
 167#else /* CONFIG_HOTPLUG_PCI_S390 */
 168static inline int zpci_init_slot(struct zpci_dev *zdev)
 169{
 170        return 0;
 171}
 172static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 173#endif /* CONFIG_HOTPLUG_PCI_S390 */
 174
 175/* Helpers */
 176static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
 177{
 178        return pdev->sysdata;
 179}
 180
 181struct zpci_dev *get_zdev_by_fid(u32);
 182
 183/* DMA */
 184int zpci_dma_init(void);
 185void zpci_dma_exit(void);
 186
 187/* FMB */
 188int zpci_fmb_enable_device(struct zpci_dev *);
 189int zpci_fmb_disable_device(struct zpci_dev *);
 190
 191/* Debug */
 192int zpci_debug_init(void);
 193void zpci_debug_exit(void);
 194void zpci_debug_init_device(struct zpci_dev *, const char *);
 195void zpci_debug_exit_device(struct zpci_dev *);
 196void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 197
 198#ifdef CONFIG_NUMA
 199
 200/* Returns the node based on PCI bus */
 201static inline int __pcibus_to_node(const struct pci_bus *bus)
 202{
 203        return NUMA_NO_NODE;
 204}
 205
 206static inline const struct cpumask *
 207cpumask_of_pcibus(const struct pci_bus *bus)
 208{
 209        return cpu_online_mask;
 210}
 211
 212#endif /* CONFIG_NUMA */
 213
 214#endif
 215