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 #include <asm/sclp.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 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 36 37 struct zpci_fmb_fmt0 { 38 u64 dma_rbytes; 39 u64 dma_wbytes; 40 }; 41 42 struct zpci_fmb_fmt1 { 43 u64 rx_bytes; 44 u64 rx_packets; 45 u64 tx_bytes; 46 u64 tx_packets; 47 }; 48 49 struct zpci_fmb_fmt2 { 50 u64 consumed_work_units; 51 u64 max_work_units; 52 }; 53 54 struct zpci_fmb { 55 u32 format : 8; 56 u32 fmt_ind : 24; 57 u32 samples; 58 u64 last_update; 59 /* common counters */ 60 u64 ld_ops; 61 u64 st_ops; 62 u64 stb_ops; 63 u64 rpcit_ops; 64 /* format specific counters */ 65 union { 66 struct zpci_fmb_fmt0 fmt0; 67 struct zpci_fmb_fmt1 fmt1; 68 struct zpci_fmb_fmt2 fmt2; 69 }; 70 } __packed __aligned(128); 71 72 enum zpci_state { 73 ZPCI_FN_STATE_RESERVED, 74 ZPCI_FN_STATE_STANDBY, 75 ZPCI_FN_STATE_CONFIGURED, 76 ZPCI_FN_STATE_ONLINE, 77 NR_ZPCI_FN_STATES, 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 int 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 iommu_size; 122 unsigned long iommu_pages; 123 unsigned int next_bit; 124 125 char res_name[16]; 126 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 127 128 u64 start_dma; /* Start of available DMA addresses */ 129 u64 end_dma; /* End of available DMA addresses */ 130 u64 dma_mask; /* DMA address space mask */ 131 132 /* Function measurement block */ 133 struct zpci_fmb *fmb; 134 u16 fmb_update; /* update interval */ 135 /* software counters */ 136 atomic64_t allocated_pages; 137 atomic64_t mapped_pages; 138 atomic64_t unmapped_pages; 139 140 enum pci_bus_speed max_bus_speed; 141 142 struct dentry *debugfs_dev; 143 struct dentry *debugfs_perf; 144 145 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 146 }; 147 148 static inline bool zdev_enabled(struct zpci_dev *zdev) 149 { 150 return (zdev->fh & (1UL << 31)) ? true : false; 151 } 152 153 extern const struct attribute_group *zpci_attr_groups[]; 154 155 /* ----------------------------------------------------------------------------- 156 Prototypes 157 ----------------------------------------------------------------------------- */ 158 /* Base stuff */ 159 int zpci_create_device(struct zpci_dev *); 160 int zpci_enable_device(struct zpci_dev *); 161 int zpci_disable_device(struct zpci_dev *); 162 void zpci_stop_device(struct zpci_dev *); 163 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 164 int zpci_unregister_ioat(struct zpci_dev *, u8); 165 166 /* CLP */ 167 int clp_scan_pci_devices(void); 168 int clp_rescan_pci_devices(void); 169 int clp_rescan_pci_devices_simple(void); 170 int clp_add_pci_device(u32, u32, int); 171 int clp_enable_fh(struct zpci_dev *, u8); 172 int clp_disable_fh(struct zpci_dev *); 173 174 #ifdef CONFIG_PCI 175 /* Error handling and recovery */ 176 void zpci_event_error(void *); 177 void zpci_event_availability(void *); 178 void zpci_rescan(void); 179 bool zpci_is_enabled(void); 180 #else /* CONFIG_PCI */ 181 static inline void zpci_event_error(void *e) {} 182 static inline void zpci_event_availability(void *e) {} 183 static inline void zpci_rescan(void) {} 184 #endif /* CONFIG_PCI */ 185 186 #ifdef CONFIG_HOTPLUG_PCI_S390 187 int zpci_init_slot(struct zpci_dev *); 188 void zpci_exit_slot(struct zpci_dev *); 189 #else /* CONFIG_HOTPLUG_PCI_S390 */ 190 static inline int zpci_init_slot(struct zpci_dev *zdev) 191 { 192 return 0; 193 } 194 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 195 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 196 197 /* Helpers */ 198 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 199 { 200 return pdev->sysdata; 201 } 202 203 struct zpci_dev *get_zdev_by_fid(u32); 204 205 /* DMA */ 206 int zpci_dma_init(void); 207 void zpci_dma_exit(void); 208 209 /* FMB */ 210 int zpci_fmb_enable_device(struct zpci_dev *); 211 int zpci_fmb_disable_device(struct zpci_dev *); 212 213 /* Debug */ 214 int zpci_debug_init(void); 215 void zpci_debug_exit(void); 216 void zpci_debug_init_device(struct zpci_dev *, const char *); 217 void zpci_debug_exit_device(struct zpci_dev *); 218 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 219 220 /* Error reporting */ 221 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 222 223 #ifdef CONFIG_NUMA 224 225 /* Returns the node based on PCI bus */ 226 static inline int __pcibus_to_node(const struct pci_bus *bus) 227 { 228 return NUMA_NO_NODE; 229 } 230 231 static inline const struct cpumask * 232 cpumask_of_pcibus(const struct pci_bus *bus) 233 { 234 return cpu_online_mask; 235 } 236 237 #endif /* CONFIG_NUMA */ 238 239 #endif 240