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 <asm-generic/pci.h> 12 #include <asm-generic/pci-dma-compat.h> 13 #include <asm/pci_clp.h> 14 #include <asm/pci_debug.h> 15 16 #define PCIBIOS_MIN_IO 0x1000 17 #define PCIBIOS_MIN_MEM 0x10000000 18 19 #define pcibios_assign_all_busses() (0) 20 21 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 22 void pci_iounmap(struct pci_dev *, void __iomem *); 23 int pci_domain_nr(struct pci_bus *); 24 int pci_proc_domain(struct pci_bus *); 25 26 #define ZPCI_BUS_NR 0 /* default bus number */ 27 #define ZPCI_DEVFN 0 /* default device number */ 28 29 /* PCI Function Controls */ 30 #define ZPCI_FC_FN_ENABLED 0x80 31 #define ZPCI_FC_ERROR 0x40 32 #define ZPCI_FC_BLOCKED 0x20 33 #define ZPCI_FC_DMA_ENABLED 0x10 34 35 struct zpci_fmb { 36 u32 format : 8; 37 u32 dma_valid : 1; 38 u32 : 23; 39 u32 samples; 40 u64 last_update; 41 /* hardware counters */ 42 u64 ld_ops; 43 u64 st_ops; 44 u64 stb_ops; 45 u64 rpcit_ops; 46 u64 dma_rbytes; 47 u64 dma_wbytes; 48 } __packed __aligned(16); 49 50 enum zpci_state { 51 ZPCI_FN_STATE_RESERVED, 52 ZPCI_FN_STATE_STANDBY, 53 ZPCI_FN_STATE_CONFIGURED, 54 ZPCI_FN_STATE_ONLINE, 55 NR_ZPCI_FN_STATES, 56 }; 57 58 struct zpci_bar_struct { 59 struct resource *res; /* bus resource */ 60 u32 val; /* bar start & 3 flag bits */ 61 u16 map_idx; /* index into bar mapping array */ 62 u8 size; /* order 2 exponent */ 63 }; 64 65 struct s390_domain; 66 67 /* Private data per function */ 68 struct zpci_dev { 69 struct pci_dev *pdev; 70 struct pci_bus *bus; 71 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 72 73 enum zpci_state state; 74 u32 fid; /* function ID, used by sclp */ 75 u32 fh; /* function handle, used by insn's */ 76 u16 vfn; /* virtual function number */ 77 u16 pchid; /* physical channel ID */ 78 u8 pfgid; /* function group ID */ 79 u8 pft; /* pci function type */ 80 u16 domain; 81 82 struct mutex lock; 83 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 84 u32 uid; /* user defined id */ 85 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 86 87 /* IRQ stuff */ 88 u64 msi_addr; /* MSI address */ 89 unsigned int max_msi; /* maximum number of MSI's */ 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 char res_name[16]; 105 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 106 107 u64 start_dma; /* Start of available DMA addresses */ 108 u64 end_dma; /* End of available DMA addresses */ 109 u64 dma_mask; /* DMA address space mask */ 110 111 /* Function measurement block */ 112 struct zpci_fmb *fmb; 113 u16 fmb_update; /* update interval */ 114 /* software counters */ 115 atomic64_t allocated_pages; 116 atomic64_t mapped_pages; 117 atomic64_t unmapped_pages; 118 119 enum pci_bus_speed max_bus_speed; 120 121 struct dentry *debugfs_dev; 122 struct dentry *debugfs_perf; 123 124 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 125 }; 126 127 static inline bool zdev_enabled(struct zpci_dev *zdev) 128 { 129 return (zdev->fh & (1UL << 31)) ? true : false; 130 } 131 132 extern const struct attribute_group *zpci_attr_groups[]; 133 134 /* ----------------------------------------------------------------------------- 135 Prototypes 136 ----------------------------------------------------------------------------- */ 137 /* Base stuff */ 138 int zpci_create_device(struct zpci_dev *); 139 int zpci_enable_device(struct zpci_dev *); 140 int zpci_disable_device(struct zpci_dev *); 141 void zpci_stop_device(struct zpci_dev *); 142 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 143 int zpci_unregister_ioat(struct zpci_dev *, u8); 144 145 /* CLP */ 146 int clp_scan_pci_devices(void); 147 int clp_rescan_pci_devices(void); 148 int clp_rescan_pci_devices_simple(void); 149 int clp_add_pci_device(u32, u32, int); 150 int clp_enable_fh(struct zpci_dev *, u8); 151 int clp_disable_fh(struct zpci_dev *); 152 153 #ifdef CONFIG_PCI 154 /* Error handling and recovery */ 155 void zpci_event_error(void *); 156 void zpci_event_availability(void *); 157 void zpci_rescan(void); 158 bool zpci_is_enabled(void); 159 #else /* CONFIG_PCI */ 160 static inline void zpci_event_error(void *e) {} 161 static inline void zpci_event_availability(void *e) {} 162 static inline void zpci_rescan(void) {} 163 #endif /* CONFIG_PCI */ 164 165 #ifdef CONFIG_HOTPLUG_PCI_S390 166 int zpci_init_slot(struct zpci_dev *); 167 void zpci_exit_slot(struct zpci_dev *); 168 #else /* CONFIG_HOTPLUG_PCI_S390 */ 169 static inline int zpci_init_slot(struct zpci_dev *zdev) 170 { 171 return 0; 172 } 173 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 174 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 175 176 /* Helpers */ 177 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 178 { 179 return pdev->sysdata; 180 } 181 182 struct zpci_dev *get_zdev_by_fid(u32); 183 184 /* DMA */ 185 int zpci_dma_init(void); 186 void zpci_dma_exit(void); 187 188 /* FMB */ 189 int zpci_fmb_enable_device(struct zpci_dev *); 190 int zpci_fmb_disable_device(struct zpci_dev *); 191 192 /* Debug */ 193 int zpci_debug_init(void); 194 void zpci_debug_exit(void); 195 void zpci_debug_init_device(struct zpci_dev *); 196 void zpci_debug_exit_device(struct zpci_dev *); 197 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 198 199 #ifdef CONFIG_NUMA 200 201 /* Returns the node based on PCI bus */ 202 static inline int __pcibus_to_node(const struct pci_bus *bus) 203 { 204 return NUMA_NO_NODE; 205 } 206 207 static inline const struct cpumask * 208 cpumask_of_pcibus(const struct pci_bus *bus) 209 { 210 return cpu_online_mask; 211 } 212 213 #endif /* CONFIG_NUMA */ 214 215 #endif 216