1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_S390_PCI_H 3 #define __ASM_S390_PCI_H 4 5 /* must be set before including pci_clp.h */ 6 #define PCI_BAR_COUNT 6 7 8 #include <linux/pci.h> 9 #include <linux/mutex.h> 10 #include <linux/iommu.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_STANDBY = 0, 74 ZPCI_FN_STATE_CONFIGURED = 1, 75 ZPCI_FN_STATE_RESERVED = 2, 76 ZPCI_FN_STATE_ONLINE = 3, 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 long 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 *lazy_bitmap; 121 unsigned long iommu_size; 122 unsigned long iommu_pages; 123 unsigned int next_bit; 124 125 struct iommu_device iommu_dev; /* IOMMU core handle */ 126 127 char res_name[16]; 128 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 129 130 u64 start_dma; /* Start of available DMA addresses */ 131 u64 end_dma; /* End of available DMA addresses */ 132 u64 dma_mask; /* DMA address space mask */ 133 134 /* Function measurement block */ 135 struct zpci_fmb *fmb; 136 u16 fmb_update; /* update interval */ 137 u16 fmb_length; 138 /* software counters */ 139 atomic64_t allocated_pages; 140 atomic64_t mapped_pages; 141 atomic64_t unmapped_pages; 142 143 enum pci_bus_speed max_bus_speed; 144 145 struct dentry *debugfs_dev; 146 struct dentry *debugfs_perf; 147 148 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 149 }; 150 151 static inline bool zdev_enabled(struct zpci_dev *zdev) 152 { 153 return (zdev->fh & (1UL << 31)) ? true : false; 154 } 155 156 extern const struct attribute_group *zpci_attr_groups[]; 157 158 /* ----------------------------------------------------------------------------- 159 Prototypes 160 ----------------------------------------------------------------------------- */ 161 /* Base stuff */ 162 int zpci_create_device(struct zpci_dev *); 163 void zpci_remove_device(struct zpci_dev *zdev); 164 int zpci_enable_device(struct zpci_dev *); 165 int zpci_disable_device(struct zpci_dev *); 166 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 167 int zpci_unregister_ioat(struct zpci_dev *, u8); 168 void zpci_remove_reserved_devices(void); 169 170 /* CLP */ 171 int clp_scan_pci_devices(void); 172 int clp_rescan_pci_devices(void); 173 int clp_rescan_pci_devices_simple(void); 174 int clp_add_pci_device(u32, u32, int); 175 int clp_enable_fh(struct zpci_dev *, u8); 176 int clp_disable_fh(struct zpci_dev *); 177 int clp_get_state(u32 fid, enum zpci_state *state); 178 179 /* IOMMU Interface */ 180 int zpci_init_iommu(struct zpci_dev *zdev); 181 void zpci_destroy_iommu(struct zpci_dev *zdev); 182 183 #ifdef CONFIG_PCI 184 /* Error handling and recovery */ 185 void zpci_event_error(void *); 186 void zpci_event_availability(void *); 187 void zpci_rescan(void); 188 bool zpci_is_enabled(void); 189 #else /* CONFIG_PCI */ 190 static inline void zpci_event_error(void *e) {} 191 static inline void zpci_event_availability(void *e) {} 192 static inline void zpci_rescan(void) {} 193 #endif /* CONFIG_PCI */ 194 195 #ifdef CONFIG_HOTPLUG_PCI_S390 196 int zpci_init_slot(struct zpci_dev *); 197 void zpci_exit_slot(struct zpci_dev *); 198 #else /* CONFIG_HOTPLUG_PCI_S390 */ 199 static inline int zpci_init_slot(struct zpci_dev *zdev) 200 { 201 return 0; 202 } 203 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 204 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 205 206 /* Helpers */ 207 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 208 { 209 return pdev->sysdata; 210 } 211 212 struct zpci_dev *get_zdev_by_fid(u32); 213 214 /* DMA */ 215 int zpci_dma_init(void); 216 void zpci_dma_exit(void); 217 218 /* FMB */ 219 int zpci_fmb_enable_device(struct zpci_dev *); 220 int zpci_fmb_disable_device(struct zpci_dev *); 221 222 /* Debug */ 223 int zpci_debug_init(void); 224 void zpci_debug_exit(void); 225 void zpci_debug_init_device(struct zpci_dev *, const char *); 226 void zpci_debug_exit_device(struct zpci_dev *); 227 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 228 229 /* Error reporting */ 230 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 231 232 #ifdef CONFIG_NUMA 233 234 /* Returns the node based on PCI bus */ 235 static inline int __pcibus_to_node(const struct pci_bus *bus) 236 { 237 return NUMA_NO_NODE; 238 } 239 240 static inline const struct cpumask * 241 cpumask_of_pcibus(const struct pci_bus *bus) 242 { 243 return cpu_online_mask; 244 } 245 246 #endif /* CONFIG_NUMA */ 247 248 #endif 249