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 <linux/iommu.h>
  12 #include <asm-generic/pci.h>
  13 #include <asm/pci_clp.h>
  14 #include <asm/pci_debug.h>
  15 #include <asm/sclp.h>
  16
  17 #define PCIBIOS_MIN_IO          0x1000
  18 #define PCIBIOS_MIN_MEM         0x10000000
  19
  20 #define pcibios_assign_all_busses()     (0)
  21
  22 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
  23 void pci_iounmap(struct pci_dev *, void __iomem *);
  24 int pci_domain_nr(struct pci_bus *);
  25 int pci_proc_domain(struct pci_bus *);
  26
  27 #define ZPCI_BUS_NR                     0       /* default bus number */
  28 #define ZPCI_DEVFN                      0       /* default device number */
  29
  30 /* PCI Function Controls */
  31 #define ZPCI_FC_FN_ENABLED              0x80
  32 #define ZPCI_FC_ERROR                   0x40
  33 #define ZPCI_FC_BLOCKED                 0x20
  34 #define ZPCI_FC_DMA_ENABLED             0x10
  35
  36 #define ZPCI_FMB_DMA_COUNTER_VALID      (1 << 23)
  37
  38 struct zpci_fmb_fmt0 {
  39         u64 dma_rbytes;
  40         u64 dma_wbytes;
  41 };
  42
  43 struct zpci_fmb_fmt1 {
  44         u64 rx_bytes;
  45         u64 rx_packets;
  46         u64 tx_bytes;
  47         u64 tx_packets;
  48 };
  49
  50 struct zpci_fmb_fmt2 {
  51         u64 consumed_work_units;
  52         u64 max_work_units;
  53 };
  54
  55 struct zpci_fmb {
  56         u32 format      : 8;
  57         u32 fmt_ind     : 24;
  58         u32 samples;
  59         u64 last_update;
  60         /* common counters */
  61         u64 ld_ops;
  62         u64 st_ops;
  63         u64 stb_ops;
  64         u64 rpcit_ops;
  65         /* format specific counters */
  66         union {
  67                 struct zpci_fmb_fmt0 fmt0;
  68                 struct zpci_fmb_fmt1 fmt1;
  69                 struct zpci_fmb_fmt2 fmt2;
  70         };
  71 } __packed __aligned(128);
  72
  73 enum zpci_state {
  74         ZPCI_FN_STATE_STANDBY = 0,
  75         ZPCI_FN_STATE_CONFIGURED = 1,
  76         ZPCI_FN_STATE_RESERVED = 2,
  77         ZPCI_FN_STATE_ONLINE = 3,
  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 long   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   *lazy_bitmap;
 122         unsigned long   iommu_size;
 123         unsigned long   iommu_pages;
 124         unsigned int    next_bit;
 125
 126         struct iommu_device iommu_dev;  /* IOMMU core handle */
 127
 128         char res_name[16];
 129         struct zpci_bar_struct bars[PCI_BAR_COUNT];
 130
 131         u64             start_dma;      /* Start of available DMA addresses */
 132         u64             end_dma;        /* End of available DMA addresses */
 133         u64             dma_mask;       /* DMA address space mask */
 134
 135         /* Function measurement block */
 136         struct zpci_fmb *fmb;
 137         u16             fmb_update;     /* update interval */
 138         u16             fmb_length;
 139         /* software counters */
 140         atomic64_t allocated_pages;
 141         atomic64_t mapped_pages;
 142         atomic64_t unmapped_pages;
 143
 144         enum pci_bus_speed max_bus_speed;
 145
 146         struct dentry   *debugfs_dev;
 147         struct dentry   *debugfs_perf;
 148
 149         struct s390_domain *s390_domain; /* s390 IOMMU domain data */
 150 };
 151
 152 static inline bool zdev_enabled(struct zpci_dev *zdev)
 153 {
 154         return (zdev->fh & (1UL << 31)) ? true : false;
 155 }
 156
 157 extern const struct attribute_group *zpci_attr_groups[];
 158
 159 /* -----------------------------------------------------------------------------
 160   Prototypes
 161 ----------------------------------------------------------------------------- */
 162 /* Base stuff */
 163 int zpci_create_device(struct zpci_dev *);
 164 void zpci_remove_device(struct zpci_dev *zdev);
 165 int zpci_enable_device(struct zpci_dev *);
 166 int zpci_disable_device(struct zpci_dev *);
 167 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
 168 int zpci_unregister_ioat(struct zpci_dev *, u8);
 169 void zpci_remove_reserved_devices(void);
 170
 171 /* CLP */
 172 int clp_scan_pci_devices(void);
 173 int clp_rescan_pci_devices(void);
 174 int clp_rescan_pci_devices_simple(void);
 175 int clp_add_pci_device(u32, u32, int);
 176 int clp_enable_fh(struct zpci_dev *, u8);
 177 int clp_disable_fh(struct zpci_dev *);
 178 int clp_get_state(u32 fid, enum zpci_state *state);
 179
 180 /* IOMMU Interface */
 181 int zpci_init_iommu(struct zpci_dev *zdev);
 182 void zpci_destroy_iommu(struct zpci_dev *zdev);
 183
 184 #ifdef CONFIG_PCI
 185 /* Error handling and recovery */
 186 void zpci_event_error(void *);
 187 void zpci_event_availability(void *);
 188 void zpci_rescan(void);
 189 bool zpci_is_enabled(void);
 190 #else /* CONFIG_PCI */
 191 static inline void zpci_event_error(void *e) {}
 192 static inline void zpci_event_availability(void *e) {}
 193 static inline void zpci_rescan(void) {}
 194 #endif /* CONFIG_PCI */
 195
 196 #ifdef CONFIG_HOTPLUG_PCI_S390
 197 int zpci_init_slot(struct zpci_dev *);
 198 void zpci_exit_slot(struct zpci_dev *);
 199 #else /* CONFIG_HOTPLUG_PCI_S390 */
 200 static inline int zpci_init_slot(struct zpci_dev *zdev)
 201 {
 202         return 0;
 203 }
 204 static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
 205 #endif /* CONFIG_HOTPLUG_PCI_S390 */
 206
 207 /* Helpers */
 208 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
 209 {
 210         return pdev->sysdata;
 211 }
 212
 213 struct zpci_dev *get_zdev_by_fid(u32);
 214
 215 /* DMA */
 216 int zpci_dma_init(void);
 217 void zpci_dma_exit(void);
 218
 219 /* FMB */
 220 int zpci_fmb_enable_device(struct zpci_dev *);
 221 int zpci_fmb_disable_device(struct zpci_dev *);
 222
 223 /* Debug */
 224 int zpci_debug_init(void);
 225 void zpci_debug_exit(void);
 226 void zpci_debug_init_device(struct zpci_dev *, const char *);
 227 void zpci_debug_exit_device(struct zpci_dev *);
 228 void zpci_debug_info(struct zpci_dev *, struct seq_file *);
 229
 230 /* Error reporting */
 231 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
 232
 233 #ifdef CONFIG_NUMA
 234
 235 /* Returns the node based on PCI bus */
 236 static inline int __pcibus_to_node(const struct pci_bus *bus)
 237 {
 238         return NUMA_NO_NODE;
 239 }
 240
 241 static inline const struct cpumask *
 242 cpumask_of_pcibus(const struct pci_bus *bus)
 243 {
 244         return cpu_online_mask;
 245 }
 246
 247 #endif /* CONFIG_NUMA */
 248
 249 #endif