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