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 <asm-generic/pci.h>
  10#include <asm-generic/pci-dma-compat.h>
  11#include <asm/pci_clp.h>
  12#include <asm/pci_debug.h>
  13
  14#define PCIBIOS_MIN_IO          0x1000
  15#define PCIBIOS_MIN_MEM         0x10000000
  16
  17#define pcibios_assign_all_busses()     (0)
  18
  19void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
  20void pci_iounmap(struct pci_dev *, void __iomem *);
  21int pci_domain_nr(struct pci_bus *);
  22int pci_proc_domain(struct pci_bus *);
  23
  24/* MSI arch hooks */
  25#define arch_setup_msi_irqs     arch_setup_msi_irqs
  26#define arch_teardown_msi_irqs  arch_teardown_msi_irqs
  27
  28#define ZPCI_BUS_NR                     0       /* default bus number */
  29#define ZPCI_DEVFN                      0       /* default device number */
  30
  31/* PCI Function Controls */
  32#define ZPCI_FC_FN_ENABLED              0x80
  33#define ZPCI_FC_ERROR                   0x40
  34#define ZPCI_FC_BLOCKED                 0x20
  35#define ZPCI_FC_DMA_ENABLED             0x10
  36
  37struct zpci_fmb {
  38        u32 format      :  8;
  39        u32 dma_valid   :  1;
  40        u32             : 23;
  41        u32 samples;
  42        u64 last_update;
  43        /* hardware counters */
  44        u64 ld_ops;
  45        u64 st_ops;
  46        u64 stb_ops;
  47        u64 rpcit_ops;
  48        u64 dma_rbytes;
  49        u64 dma_wbytes;
  50        /* software counters */
  51        atomic64_t allocated_pages;
  52        atomic64_t mapped_pages;
  53        atomic64_t unmapped_pages;
  54} __packed __aligned(16);
  55
  56struct msi_map {
  57        unsigned long irq;
  58        struct msi_desc *msi;
  59        struct hlist_node msi_chain;
  60};
  61
  62#define ZPCI_NR_MSI_VECS        64
  63#define ZPCI_MSI_MASK           (ZPCI_NR_MSI_VECS - 1)
  64
  65enum zpci_state {
  66        ZPCI_FN_STATE_RESERVED,
  67        ZPCI_FN_STATE_STANDBY,
  68        ZPCI_FN_STATE_CONFIGURED,
  69        ZPCI_FN_STATE_ONLINE,
  70        NR_ZPCI_FN_STATES,
  71};
  72
  73struct zpci_bar_struct {
  74        u32             val;            /* bar start & 3 flag bits */
  75        u8              size;           /* order 2 exponent */
  76        u16             map_idx;        /* index into bar mapping array */
  77};
  78
  79/* Private data per function */
  80struct zpci_dev {
  81        struct pci_dev  *pdev;
  82        struct pci_bus  *bus;
  83        struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
  84
  85        enum zpci_state state;
  86        u32             fid;            /* function ID, used by sclp */
  87        u32             fh;             /* function handle, used by insn's */
  88        u16             pchid;          /* physical channel ID */
  89        u8              pfgid;          /* function group ID */
  90        u16             domain;
  91
  92        /* IRQ stuff */
  93        u64             msi_addr;       /* MSI address */
  94        struct zdev_irq_map *irq_map;
  95        struct msi_map *msi_map[ZPCI_NR_MSI_VECS];
  96        unsigned int    aisb;           /* number of the summary bit */
  97
  98        /* DMA stuff */
  99        unsigned long   *dma_table;
 100        spinlock_t      dma_table_lock;
 101        int             tlb_refresh;
 102
 103        spinlock_t      iommu_bitmap_lock;
 104        unsigned long   *iommu_bitmap;
 105        unsigned long   iommu_size;
 106        unsigned long   iommu_pages;
 107        unsigned int    next_bit;
 108
 109        struct zpci_bar_struct bars[PCI_BAR_COUNT];
 110
 111        u64             start_dma;      /* Start of available DMA addresses */
 112        u64             end_dma;        /* End of available DMA addresses */
 113        u64             dma_mask;       /* DMA address space mask */
 114
 115        /* Function measurement block */
 116        struct zpci_fmb *fmb;
 117        u16             fmb_update;     /* update interval */
 118
 119        enum pci_bus_speed max_bus_speed;
 120
 121        struct dentry   *debugfs_dev;
 122        struct dentry   *debugfs_perf;
 123};
 124
 125struct pci_hp_callback_ops {
 126        int (*create_slot)      (struct zpci_dev *zdev);
 127        void (*remove_slot)     (struct zpci_dev *zdev);
 128};
 129
 130static inline bool zdev_enabled(struct zpci_dev *zdev)
 131{
 132        return (zdev->fh & (1UL << 31)) ? true : false;
 133}
 134
 135/* -----------------------------------------------------------------------------
 136  Prototypes
 137----------------------------------------------------------------------------- */
 138/* Base stuff */
 139struct zpci_dev *zpci_alloc_device(void);
 140int zpci_create_device(struct zpci_dev *);
 141int zpci_enable_device(struct zpci_dev *);
 142int zpci_disable_device(struct zpci_dev *);
 143void zpci_stop_device(struct zpci_dev *);
 144void zpci_free_device(struct zpci_dev *);
 145int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 146int zpci_unregister_ioat(struct zpci_dev *, u8);
 147
 148/* CLP */
 149int clp_find_pci_devices(void);
 150int clp_add_pci_device(u32, u32, int);
 151int clp_enable_fh(struct zpci_dev *, u8);
 152int clp_disable_fh(struct zpci_dev *);
 153
 154/* MSI */
 155struct msi_desc *__irq_get_msi_desc(unsigned int);
 156int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32);
 157int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int);
 158void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *);
 159int zpci_msihash_init(void);
 160void zpci_msihash_exit(void);
 161
 162#ifdef CONFIG_PCI
 163/* Error handling and recovery */
 164void zpci_event_error(void *);
 165void zpci_event_availability(void *);
 166#else /* CONFIG_PCI */
 167static inline void zpci_event_error(void *e) {}
 168static inline void zpci_event_availability(void *e) {}
 169#endif /* CONFIG_PCI */
 170
 171/* Helpers */
 172struct zpci_dev *get_zdev(struct pci_dev *);
 173struct zpci_dev *get_zdev_by_fid(u32);
 174bool zpci_fid_present(u32);
 175
 176/* sysfs */
 177int zpci_sysfs_add_device(struct device *);
 178void zpci_sysfs_remove_device(struct device *);
 179
 180/* DMA */
 181int zpci_dma_init(void);
 182void zpci_dma_exit(void);
 183
 184/* Hotplug */
 185extern struct mutex zpci_list_lock;
 186extern struct list_head zpci_list;
 187extern unsigned int s390_pci_probe;
 188
 189void zpci_register_hp_ops(struct pci_hp_callback_ops *);
 190void zpci_deregister_hp_ops(void);
 191
 192/* FMB */
 193int zpci_fmb_enable_device(struct zpci_dev *);
 194int zpci_fmb_disable_device(struct zpci_dev *);
 195
 196/* Debug */
 197int zpci_debug_init(void);
 198void zpci_debug_exit(void);
 199void zpci_debug_init_device(struct zpci_dev *);
 200void zpci_debug_exit_device(struct zpci_dev *);
 201void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 202
 203#endif
 204