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