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/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 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 35 36 struct zpci_fmb_fmt0 { 37 u64 dma_rbytes; 38 u64 dma_wbytes; 39 }; 40 41 struct zpci_fmb_fmt1 { 42 u64 rx_bytes; 43 u64 rx_packets; 44 u64 tx_bytes; 45 u64 tx_packets; 46 }; 47 48 struct zpci_fmb_fmt2 { 49 u64 consumed_work_units; 50 u64 max_work_units; 51 }; 52 53 struct zpci_fmb { 54 u32 format : 8; 55 u32 fmt_ind : 24; 56 u32 samples; 57 u64 last_update; 58 /* common counters */ 59 u64 ld_ops; 60 u64 st_ops; 61 u64 stb_ops; 62 u64 rpcit_ops; 63 /* format specific counters */ 64 union { 65 struct zpci_fmb_fmt0 fmt0; 66 struct zpci_fmb_fmt1 fmt1; 67 struct zpci_fmb_fmt2 fmt2; 68 }; 69 } __packed __aligned(128); 70 71 enum zpci_state { 72 ZPCI_FN_STATE_RESERVED, 73 ZPCI_FN_STATE_STANDBY, 74 ZPCI_FN_STATE_CONFIGURED, 75 ZPCI_FN_STATE_ONLINE, 76 NR_ZPCI_FN_STATES, 77 }; 78 79 struct zpci_bar_struct { 80 struct resource *res; /* bus resource */ 81 u32 val; /* bar start & 3 flag bits */ 82 u16 map_idx; /* index into bar mapping array */ 83 u8 size; /* order 2 exponent */ 84 }; 85 86 struct s390_domain; 87 88 /* Private data per function */ 89 struct zpci_dev { 90 struct pci_bus *bus; 91 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 92 93 enum zpci_state state; 94 u32 fid; /* function ID, used by sclp */ 95 u32 fh; /* function handle, used by insn's */ 96 u16 vfn; /* virtual function number */ 97 u16 pchid; /* physical channel ID */ 98 u8 pfgid; /* function group ID */ 99 u8 pft; /* pci function type */ 100 u16 domain; 101 102 struct mutex lock; 103 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 104 u32 uid; /* user defined id */ 105 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 106 107 /* IRQ stuff */ 108 u64 msi_addr; /* MSI address */ 109 unsigned int max_msi; /* maximum number of MSI's */ 110 struct airq_iv *aibv; /* adapter interrupt bit vector */ 111 unsigned int aisb; /* number of the summary bit */ 112 113 /* DMA stuff */ 114 unsigned long *dma_table; 115 spinlock_t dma_table_lock; 116 int tlb_refresh; 117 118 spinlock_t iommu_bitmap_lock; 119 unsigned long *iommu_bitmap; 120 unsigned long iommu_size; 121 unsigned long iommu_pages; 122 unsigned int next_bit; 123 124 char res_name[16]; 125 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 126 127 u64 start_dma; /* Start of available DMA addresses */ 128 u64 end_dma; /* End of available DMA addresses */ 129 u64 dma_mask; /* DMA address space mask */ 130 131 /* Function measurement block */ 132 struct zpci_fmb *fmb; 133 u16 fmb_update; /* update interval */ 134 /* software counters */ 135 atomic64_t allocated_pages; 136 atomic64_t mapped_pages; 137 atomic64_t unmapped_pages; 138 139 enum pci_bus_speed max_bus_speed; 140 141 struct dentry *debugfs_dev; 142 struct dentry *debugfs_perf; 143 144 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 145 }; 146 147 static inline bool zdev_enabled(struct zpci_dev *zdev) 148 { 149 return (zdev->fh & (1UL << 31)) ? true : false; 150 } 151 152 extern const struct attribute_group *zpci_attr_groups[]; 153 154 /* ----------------------------------------------------------------------------- 155 Prototypes 156 ----------------------------------------------------------------------------- */ 157 /* Base stuff */ 158 int zpci_create_device(struct zpci_dev *); 159 int zpci_enable_device(struct zpci_dev *); 160 int zpci_disable_device(struct zpci_dev *); 161 void zpci_stop_device(struct zpci_dev *); 162 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 163 int zpci_unregister_ioat(struct zpci_dev *, u8); 164 165 /* CLP */ 166 int clp_scan_pci_devices(void); 167 int clp_rescan_pci_devices(void); 168 int clp_rescan_pci_devices_simple(void); 169 int clp_add_pci_device(u32, u32, int); 170 int clp_enable_fh(struct zpci_dev *, u8); 171 int clp_disable_fh(struct zpci_dev *); 172 173 #ifdef CONFIG_PCI 174 /* Error handling and recovery */ 175 void zpci_event_error(void *); 176 void zpci_event_availability(void *); 177 void zpci_rescan(void); 178 bool zpci_is_enabled(void); 179 #else /* CONFIG_PCI */ 180 static inline void zpci_event_error(void *e) {} 181 static inline void zpci_event_availability(void *e) {} 182 static inline void zpci_rescan(void) {} 183 #endif /* CONFIG_PCI */ 184 185 #ifdef CONFIG_HOTPLUG_PCI_S390 186 int zpci_init_slot(struct zpci_dev *); 187 void zpci_exit_slot(struct zpci_dev *); 188 #else /* CONFIG_HOTPLUG_PCI_S390 */ 189 static inline int zpci_init_slot(struct zpci_dev *zdev) 190 { 191 return 0; 192 } 193 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 194 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 195 196 /* Helpers */ 197 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 198 { 199 return pdev->sysdata; 200 } 201 202 struct zpci_dev *get_zdev_by_fid(u32); 203 204 /* DMA */ 205 int zpci_dma_init(void); 206 void zpci_dma_exit(void); 207 208 /* FMB */ 209 int zpci_fmb_enable_device(struct zpci_dev *); 210 int zpci_fmb_disable_device(struct zpci_dev *); 211 212 /* Debug */ 213 int zpci_debug_init(void); 214 void zpci_debug_exit(void); 215 void zpci_debug_init_device(struct zpci_dev *, const char *); 216 void zpci_debug_exit_device(struct zpci_dev *); 217 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 218 219 #ifdef CONFIG_NUMA 220 221 /* Returns the node based on PCI bus */ 222 static inline int __pcibus_to_node(const struct pci_bus *bus) 223 { 224 return NUMA_NO_NODE; 225 } 226 227 static inline const struct cpumask * 228 cpumask_of_pcibus(const struct pci_bus *bus) 229 { 230 return cpu_online_mask; 231 } 232 233 #endif /* CONFIG_NUMA */ 234 235 #endif 236