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 19 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 20 void pci_iounmap(struct pci_dev *, void __iomem *); 21 int pci_domain_nr(struct pci_bus *); 22 int 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 37 struct 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 56 #define ZPCI_MSI_VEC_BITS 11 57 #define ZPCI_MSI_VEC_MAX (1 << ZPCI_MSI_VEC_BITS) 58 #define ZPCI_MSI_VEC_MASK (ZPCI_MSI_VEC_MAX - 1) 59 60 enum zpci_state { 61 ZPCI_FN_STATE_RESERVED, 62 ZPCI_FN_STATE_STANDBY, 63 ZPCI_FN_STATE_CONFIGURED, 64 ZPCI_FN_STATE_ONLINE, 65 NR_ZPCI_FN_STATES, 66 }; 67 68 struct zpci_bar_struct { 69 u32 val; /* bar start & 3 flag bits */ 70 u8 size; /* order 2 exponent */ 71 u16 map_idx; /* index into bar mapping array */ 72 }; 73 74 /* Private data per function */ 75 struct zpci_dev { 76 struct pci_dev *pdev; 77 struct pci_bus *bus; 78 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 79 80 enum zpci_state state; 81 u32 fid; /* function ID, used by sclp */ 82 u32 fh; /* function handle, used by insn's */ 83 u16 pchid; /* physical channel ID */ 84 u8 pfgid; /* function group ID */ 85 u16 domain; 86 87 /* IRQ stuff */ 88 u64 msi_addr; /* MSI address */ 89 struct airq_iv *aibv; /* adapter interrupt bit vector */ 90 unsigned int aisb; /* number of the summary bit */ 91 92 /* DMA stuff */ 93 unsigned long *dma_table; 94 spinlock_t dma_table_lock; 95 int tlb_refresh; 96 97 spinlock_t iommu_bitmap_lock; 98 unsigned long *iommu_bitmap; 99 unsigned long iommu_size; 100 unsigned long iommu_pages; 101 unsigned int next_bit; 102 103 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 104 105 u64 start_dma; /* Start of available DMA addresses */ 106 u64 end_dma; /* End of available DMA addresses */ 107 u64 dma_mask; /* DMA address space mask */ 108 109 /* Function measurement block */ 110 struct zpci_fmb *fmb; 111 u16 fmb_update; /* update interval */ 112 113 enum pci_bus_speed max_bus_speed; 114 115 struct dentry *debugfs_dev; 116 struct dentry *debugfs_perf; 117 }; 118 119 static inline bool zdev_enabled(struct zpci_dev *zdev) 120 { 121 return (zdev->fh & (1UL << 31)) ? true : false; 122 } 123 124 /* ----------------------------------------------------------------------------- 125 Prototypes 126 ----------------------------------------------------------------------------- */ 127 /* Base stuff */ 128 struct zpci_dev *zpci_alloc_device(void); 129 int zpci_create_device(struct zpci_dev *); 130 int zpci_enable_device(struct zpci_dev *); 131 int zpci_disable_device(struct zpci_dev *); 132 void zpci_stop_device(struct zpci_dev *); 133 void zpci_free_device(struct zpci_dev *); 134 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 135 int zpci_unregister_ioat(struct zpci_dev *, u8); 136 137 /* CLP */ 138 int clp_scan_pci_devices(void); 139 int clp_rescan_pci_devices(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 #else /* CONFIG_PCI */ 149 static inline void zpci_event_error(void *e) {} 150 static inline void zpci_event_availability(void *e) {} 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