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 /* MSI arch hooks */ 26 #define arch_setup_msi_irqs arch_setup_msi_irqs 27 #define arch_teardown_msi_irqs arch_teardown_msi_irqs 28 29 #define ZPCI_BUS_NR 0 /* default bus number */ 30 #define ZPCI_DEVFN 0 /* default device number */ 31 32 /* PCI Function Controls */ 33 #define ZPCI_FC_FN_ENABLED 0x80 34 #define ZPCI_FC_ERROR 0x40 35 #define ZPCI_FC_BLOCKED 0x20 36 #define ZPCI_FC_DMA_ENABLED 0x10 37 38 struct zpci_fmb { 39 u32 format : 8; 40 u32 dma_valid : 1; 41 u32 : 23; 42 u32 samples; 43 u64 last_update; 44 /* hardware counters */ 45 u64 ld_ops; 46 u64 st_ops; 47 u64 stb_ops; 48 u64 rpcit_ops; 49 u64 dma_rbytes; 50 u64 dma_wbytes; 51 /* software counters */ 52 atomic64_t allocated_pages; 53 atomic64_t mapped_pages; 54 atomic64_t unmapped_pages; 55 } __packed __aligned(16); 56 57 #define ZPCI_MSI_VEC_BITS 11 58 #define ZPCI_MSI_VEC_MAX (1 << ZPCI_MSI_VEC_BITS) 59 #define ZPCI_MSI_VEC_MASK (ZPCI_MSI_VEC_MAX - 1) 60 61 enum zpci_state { 62 ZPCI_FN_STATE_RESERVED, 63 ZPCI_FN_STATE_STANDBY, 64 ZPCI_FN_STATE_CONFIGURED, 65 ZPCI_FN_STATE_ONLINE, 66 NR_ZPCI_FN_STATES, 67 }; 68 69 struct zpci_bar_struct { 70 u32 val; /* bar start & 3 flag bits */ 71 u8 size; /* order 2 exponent */ 72 u16 map_idx; /* index into bar mapping array */ 73 }; 74 75 /* Private data per function */ 76 struct zpci_dev { 77 struct pci_dev *pdev; 78 struct pci_bus *bus; 79 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 80 81 enum zpci_state state; 82 u32 fid; /* function ID, used by sclp */ 83 u32 fh; /* function handle, used by insn's */ 84 u16 pchid; /* physical channel ID */ 85 u8 pfgid; /* function group ID */ 86 u16 domain; 87 88 /* IRQ stuff */ 89 u64 msi_addr; /* MSI address */ 90 struct airq_iv *aibv; /* adapter interrupt bit vector */ 91 unsigned int aisb; /* number of the summary bit */ 92 93 /* DMA stuff */ 94 unsigned long *dma_table; 95 spinlock_t dma_table_lock; 96 int tlb_refresh; 97 98 spinlock_t iommu_bitmap_lock; 99 unsigned long *iommu_bitmap; 100 unsigned long iommu_size; 101 unsigned long iommu_pages; 102 unsigned int next_bit; 103 104 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 */ 113 114 enum pci_bus_speed max_bus_speed; 115 116 struct dentry *debugfs_dev; 117 struct dentry *debugfs_perf; 118 }; 119 120 static inline bool zdev_enabled(struct zpci_dev *zdev) 121 { 122 return (zdev->fh & (1UL << 31)) ? true : false; 123 } 124 125 /* ----------------------------------------------------------------------------- 126 Prototypes 127 ----------------------------------------------------------------------------- */ 128 /* Base stuff */ 129 struct zpci_dev *zpci_alloc_device(void); 130 int zpci_create_device(struct zpci_dev *); 131 int zpci_enable_device(struct zpci_dev *); 132 int zpci_disable_device(struct zpci_dev *); 133 void zpci_stop_device(struct zpci_dev *); 134 void zpci_free_device(struct zpci_dev *); 135 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 136 int zpci_unregister_ioat(struct zpci_dev *, u8); 137 138 /* CLP */ 139 int clp_scan_pci_devices(void); 140 int clp_rescan_pci_devices(void); 141 int clp_rescan_pci_devices_simple(void); 142 int clp_add_pci_device(u32, u32, int); 143 int clp_enable_fh(struct zpci_dev *, u8); 144 int clp_disable_fh(struct zpci_dev *); 145 146 #ifdef CONFIG_PCI 147 /* Error handling and recovery */ 148 void zpci_event_error(void *); 149 void zpci_event_availability(void *); 150 void zpci_rescan(void); 151 #else /* CONFIG_PCI */ 152 static inline void zpci_event_error(void *e) {} 153 static inline void zpci_event_availability(void *e) {} 154 static inline void zpci_rescan(void) {} 155 #endif /* CONFIG_PCI */ 156 157 #ifdef CONFIG_HOTPLUG_PCI_S390 158 int zpci_init_slot(struct zpci_dev *); 159 void zpci_exit_slot(struct zpci_dev *); 160 #else /* CONFIG_HOTPLUG_PCI_S390 */ 161 static inline int zpci_init_slot(struct zpci_dev *zdev) 162 { 163 return 0; 164 } 165 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 166 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 167 168 /* Helpers */ 169 struct zpci_dev *get_zdev(struct pci_dev *); 170 struct zpci_dev *get_zdev_by_fid(u32); 171 172 /* sysfs */ 173 int zpci_sysfs_add_device(struct device *); 174 void zpci_sysfs_remove_device(struct device *); 175 176 /* DMA */ 177 int zpci_dma_init(void); 178 void zpci_dma_exit(void); 179 180 /* FMB */ 181 int zpci_fmb_enable_device(struct zpci_dev *); 182 int zpci_fmb_disable_device(struct zpci_dev *); 183 184 /* Debug */ 185 int zpci_debug_init(void); 186 void zpci_debug_exit(void); 187 void zpci_debug_init_device(struct zpci_dev *); 188 void zpci_debug_exit_device(struct zpci_dev *); 189 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 190 191 #endif 192