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 <linux/iommu.h> 12 #include <asm-generic/pci.h> 13 #include <asm/pci_clp.h> 14 #include <asm/pci_debug.h> 15 #include <asm/sclp.h> 16 17 #define PCIBIOS_MIN_IO 0x1000 18 #define PCIBIOS_MIN_MEM 0x10000000 19 20 #define pcibios_assign_all_busses() (0) 21 22 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 23 void pci_iounmap(struct pci_dev *, void __iomem *); 24 int pci_domain_nr(struct pci_bus *); 25 int pci_proc_domain(struct pci_bus *); 26 27 #define ZPCI_BUS_NR 0 /* default bus number */ 28 #define ZPCI_DEVFN 0 /* default device number */ 29 30 /* PCI Function Controls */ 31 #define ZPCI_FC_FN_ENABLED 0x80 32 #define ZPCI_FC_ERROR 0x40 33 #define ZPCI_FC_BLOCKED 0x20 34 #define ZPCI_FC_DMA_ENABLED 0x10 35 36 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 37 38 struct zpci_fmb_fmt0 { 39 u64 dma_rbytes; 40 u64 dma_wbytes; 41 }; 42 43 struct zpci_fmb_fmt1 { 44 u64 rx_bytes; 45 u64 rx_packets; 46 u64 tx_bytes; 47 u64 tx_packets; 48 }; 49 50 struct zpci_fmb_fmt2 { 51 u64 consumed_work_units; 52 u64 max_work_units; 53 }; 54 55 struct zpci_fmb { 56 u32 format : 8; 57 u32 fmt_ind : 24; 58 u32 samples; 59 u64 last_update; 60 /* common counters */ 61 u64 ld_ops; 62 u64 st_ops; 63 u64 stb_ops; 64 u64 rpcit_ops; 65 /* format specific counters */ 66 union { 67 struct zpci_fmb_fmt0 fmt0; 68 struct zpci_fmb_fmt1 fmt1; 69 struct zpci_fmb_fmt2 fmt2; 70 }; 71 } __packed __aligned(128); 72 73 enum zpci_state { 74 ZPCI_FN_STATE_STANDBY = 0, 75 ZPCI_FN_STATE_CONFIGURED = 1, 76 ZPCI_FN_STATE_RESERVED = 2, 77 ZPCI_FN_STATE_ONLINE = 3, 78 }; 79 80 struct zpci_bar_struct { 81 struct resource *res; /* bus resource */ 82 u32 val; /* bar start & 3 flag bits */ 83 u16 map_idx; /* index into bar mapping array */ 84 u8 size; /* order 2 exponent */ 85 }; 86 87 struct s390_domain; 88 89 /* Private data per function */ 90 struct zpci_dev { 91 struct pci_bus *bus; 92 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 93 94 enum zpci_state state; 95 u32 fid; /* function ID, used by sclp */ 96 u32 fh; /* function handle, used by insn's */ 97 u16 vfn; /* virtual function number */ 98 u16 pchid; /* physical channel ID */ 99 u8 pfgid; /* function group ID */ 100 u8 pft; /* pci function type */ 101 u16 domain; 102 103 struct mutex lock; 104 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 105 u32 uid; /* user defined id */ 106 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 107 108 /* IRQ stuff */ 109 u64 msi_addr; /* MSI address */ 110 unsigned int max_msi; /* maximum number of MSI's */ 111 struct airq_iv *aibv; /* adapter interrupt bit vector */ 112 unsigned long aisb; /* number of the summary bit */ 113 114 /* DMA stuff */ 115 unsigned long *dma_table; 116 spinlock_t dma_table_lock; 117 int tlb_refresh; 118 119 spinlock_t iommu_bitmap_lock; 120 unsigned long *iommu_bitmap; 121 unsigned long *lazy_bitmap; 122 unsigned long iommu_size; 123 unsigned long iommu_pages; 124 unsigned int next_bit; 125 126 struct iommu_device iommu_dev; /* IOMMU core handle */ 127 128 char res_name[16]; 129 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 130 131 u64 start_dma; /* Start of available DMA addresses */ 132 u64 end_dma; /* End of available DMA addresses */ 133 u64 dma_mask; /* DMA address space mask */ 134 135 /* Function measurement block */ 136 struct zpci_fmb *fmb; 137 u16 fmb_update; /* update interval */ 138 u16 fmb_length; 139 /* software counters */ 140 atomic64_t allocated_pages; 141 atomic64_t mapped_pages; 142 atomic64_t unmapped_pages; 143 144 enum pci_bus_speed max_bus_speed; 145 146 struct dentry *debugfs_dev; 147 struct dentry *debugfs_perf; 148 149 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 150 }; 151 152 static inline bool zdev_enabled(struct zpci_dev *zdev) 153 { 154 return (zdev->fh & (1UL << 31)) ? true : false; 155 } 156 157 extern const struct attribute_group *zpci_attr_groups[]; 158 159 /* ----------------------------------------------------------------------------- 160 Prototypes 161 ----------------------------------------------------------------------------- */ 162 /* Base stuff */ 163 int zpci_create_device(struct zpci_dev *); 164 void zpci_remove_device(struct zpci_dev *zdev); 165 int zpci_enable_device(struct zpci_dev *); 166 int zpci_disable_device(struct zpci_dev *); 167 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 168 int zpci_unregister_ioat(struct zpci_dev *, u8); 169 void zpci_remove_reserved_devices(void); 170 171 /* CLP */ 172 int clp_scan_pci_devices(void); 173 int clp_rescan_pci_devices(void); 174 int clp_rescan_pci_devices_simple(void); 175 int clp_add_pci_device(u32, u32, int); 176 int clp_enable_fh(struct zpci_dev *, u8); 177 int clp_disable_fh(struct zpci_dev *); 178 int clp_get_state(u32 fid, enum zpci_state *state); 179 180 /* IOMMU Interface */ 181 int zpci_init_iommu(struct zpci_dev *zdev); 182 void zpci_destroy_iommu(struct zpci_dev *zdev); 183 184 #ifdef CONFIG_PCI 185 /* Error handling and recovery */ 186 void zpci_event_error(void *); 187 void zpci_event_availability(void *); 188 void zpci_rescan(void); 189 bool zpci_is_enabled(void); 190 #else /* CONFIG_PCI */ 191 static inline void zpci_event_error(void *e) {} 192 static inline void zpci_event_availability(void *e) {} 193 static inline void zpci_rescan(void) {} 194 #endif /* CONFIG_PCI */ 195 196 #ifdef CONFIG_HOTPLUG_PCI_S390 197 int zpci_init_slot(struct zpci_dev *); 198 void zpci_exit_slot(struct zpci_dev *); 199 #else /* CONFIG_HOTPLUG_PCI_S390 */ 200 static inline int zpci_init_slot(struct zpci_dev *zdev) 201 { 202 return 0; 203 } 204 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 205 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 206 207 /* Helpers */ 208 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 209 { 210 return pdev->sysdata; 211 } 212 213 struct zpci_dev *get_zdev_by_fid(u32); 214 215 /* DMA */ 216 int zpci_dma_init(void); 217 void zpci_dma_exit(void); 218 219 /* FMB */ 220 int zpci_fmb_enable_device(struct zpci_dev *); 221 int zpci_fmb_disable_device(struct zpci_dev *); 222 223 /* Debug */ 224 int zpci_debug_init(void); 225 void zpci_debug_exit(void); 226 void zpci_debug_init_device(struct zpci_dev *, const char *); 227 void zpci_debug_exit_device(struct zpci_dev *); 228 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 229 230 /* Error reporting */ 231 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 232 233 #ifdef CONFIG_NUMA 234 235 /* Returns the node based on PCI bus */ 236 static inline int __pcibus_to_node(const struct pci_bus *bus) 237 { 238 return NUMA_NO_NODE; 239 } 240 241 static inline const struct cpumask * 242 cpumask_of_pcibus(const struct pci_bus *bus) 243 { 244 return cpu_online_mask; 245 } 246 247 #endif /* CONFIG_NUMA */ 248 249 #endif 250