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 asm-generic/pci.h */ 6 #define PCI_DMA_BUS_IS_PHYS (0) 7 /* must be set before including pci_clp.h */ 8 #define PCI_BAR_COUNT 6 9 10 #include <linux/pci.h> 11 #include <linux/mutex.h> 12 #include <linux/iommu.h> 13 #include <asm-generic/pci.h> 14 #include <asm/pci_clp.h> 15 #include <asm/pci_debug.h> 16 #include <asm/sclp.h> 17 18 #define PCIBIOS_MIN_IO 0x1000 19 #define PCIBIOS_MIN_MEM 0x10000000 20 21 #define pcibios_assign_all_busses() (0) 22 23 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 24 void pci_iounmap(struct pci_dev *, void __iomem *); 25 int pci_domain_nr(struct pci_bus *); 26 int pci_proc_domain(struct pci_bus *); 27 28 #define ZPCI_BUS_NR 0 /* default bus number */ 29 #define ZPCI_DEVFN 0 /* default device number */ 30 31 /* PCI Function Controls */ 32 #define ZPCI_FC_FN_ENABLED 0x80 33 #define ZPCI_FC_ERROR 0x40 34 #define ZPCI_FC_BLOCKED 0x20 35 #define ZPCI_FC_DMA_ENABLED 0x10 36 37 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 38 39 struct zpci_fmb_fmt0 { 40 u64 dma_rbytes; 41 u64 dma_wbytes; 42 }; 43 44 struct zpci_fmb_fmt1 { 45 u64 rx_bytes; 46 u64 rx_packets; 47 u64 tx_bytes; 48 u64 tx_packets; 49 }; 50 51 struct zpci_fmb_fmt2 { 52 u64 consumed_work_units; 53 u64 max_work_units; 54 }; 55 56 struct zpci_fmb { 57 u32 format : 8; 58 u32 fmt_ind : 24; 59 u32 samples; 60 u64 last_update; 61 /* common counters */ 62 u64 ld_ops; 63 u64 st_ops; 64 u64 stb_ops; 65 u64 rpcit_ops; 66 /* format specific counters */ 67 union { 68 struct zpci_fmb_fmt0 fmt0; 69 struct zpci_fmb_fmt1 fmt1; 70 struct zpci_fmb_fmt2 fmt2; 71 }; 72 } __packed __aligned(128); 73 74 enum zpci_state { 75 ZPCI_FN_STATE_STANDBY = 0, 76 ZPCI_FN_STATE_CONFIGURED = 1, 77 ZPCI_FN_STATE_RESERVED = 2, 78 ZPCI_FN_STATE_ONLINE = 3, 79 }; 80 81 struct zpci_bar_struct { 82 struct resource *res; /* bus resource */ 83 u32 val; /* bar start & 3 flag bits */ 84 u16 map_idx; /* index into bar mapping array */ 85 u8 size; /* order 2 exponent */ 86 }; 87 88 struct s390_domain; 89 90 /* Private data per function */ 91 struct zpci_dev { 92 struct pci_bus *bus; 93 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 94 95 enum zpci_state state; 96 u32 fid; /* function ID, used by sclp */ 97 u32 fh; /* function handle, used by insn's */ 98 u16 vfn; /* virtual function number */ 99 u16 pchid; /* physical channel ID */ 100 u8 pfgid; /* function group ID */ 101 u8 pft; /* pci function type */ 102 u16 domain; 103 104 struct mutex lock; 105 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 106 u32 uid; /* user defined id */ 107 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 108 109 /* IRQ stuff */ 110 u64 msi_addr; /* MSI address */ 111 unsigned int max_msi; /* maximum number of MSI's */ 112 struct airq_iv *aibv; /* adapter interrupt bit vector */ 113 unsigned long aisb; /* number of the summary bit */ 114 115 /* DMA stuff */ 116 unsigned long *dma_table; 117 spinlock_t dma_table_lock; 118 int tlb_refresh; 119 120 spinlock_t iommu_bitmap_lock; 121 unsigned long *iommu_bitmap; 122 unsigned long *lazy_bitmap; 123 unsigned long iommu_size; 124 unsigned long iommu_pages; 125 unsigned int next_bit; 126 127 struct iommu_device iommu_dev; /* IOMMU core handle */ 128 129 char res_name[16]; 130 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 131 132 u64 start_dma; /* Start of available DMA addresses */ 133 u64 end_dma; /* End of available DMA addresses */ 134 u64 dma_mask; /* DMA address space mask */ 135 136 /* Function measurement block */ 137 struct zpci_fmb *fmb; 138 u16 fmb_update; /* update interval */ 139 u16 fmb_length; 140 /* software counters */ 141 atomic64_t allocated_pages; 142 atomic64_t mapped_pages; 143 atomic64_t unmapped_pages; 144 145 enum pci_bus_speed max_bus_speed; 146 147 struct dentry *debugfs_dev; 148 struct dentry *debugfs_perf; 149 150 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 151 }; 152 153 static inline bool zdev_enabled(struct zpci_dev *zdev) 154 { 155 return (zdev->fh & (1UL << 31)) ? true : false; 156 } 157 158 extern const struct attribute_group *zpci_attr_groups[]; 159 160 /* ----------------------------------------------------------------------------- 161 Prototypes 162 ----------------------------------------------------------------------------- */ 163 /* Base stuff */ 164 int zpci_create_device(struct zpci_dev *); 165 void zpci_remove_device(struct zpci_dev *zdev); 166 int zpci_enable_device(struct zpci_dev *); 167 int zpci_disable_device(struct zpci_dev *); 168 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 169 int zpci_unregister_ioat(struct zpci_dev *, u8); 170 void zpci_remove_reserved_devices(void); 171 172 /* CLP */ 173 int clp_scan_pci_devices(void); 174 int clp_rescan_pci_devices(void); 175 int clp_rescan_pci_devices_simple(void); 176 int clp_add_pci_device(u32, u32, int); 177 int clp_enable_fh(struct zpci_dev *, u8); 178 int clp_disable_fh(struct zpci_dev *); 179 int clp_get_state(u32 fid, enum zpci_state *state); 180 181 /* IOMMU Interface */ 182 int zpci_init_iommu(struct zpci_dev *zdev); 183 void zpci_destroy_iommu(struct zpci_dev *zdev); 184 185 #ifdef CONFIG_PCI 186 /* Error handling and recovery */ 187 void zpci_event_error(void *); 188 void zpci_event_availability(void *); 189 void zpci_rescan(void); 190 bool zpci_is_enabled(void); 191 #else /* CONFIG_PCI */ 192 static inline void zpci_event_error(void *e) {} 193 static inline void zpci_event_availability(void *e) {} 194 static inline void zpci_rescan(void) {} 195 #endif /* CONFIG_PCI */ 196 197 #ifdef CONFIG_HOTPLUG_PCI_S390 198 int zpci_init_slot(struct zpci_dev *); 199 void zpci_exit_slot(struct zpci_dev *); 200 #else /* CONFIG_HOTPLUG_PCI_S390 */ 201 static inline int zpci_init_slot(struct zpci_dev *zdev) 202 { 203 return 0; 204 } 205 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 206 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 207 208 /* Helpers */ 209 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 210 { 211 return pdev->sysdata; 212 } 213 214 struct zpci_dev *get_zdev_by_fid(u32); 215 216 /* DMA */ 217 int zpci_dma_init(void); 218 void zpci_dma_exit(void); 219 220 /* FMB */ 221 int zpci_fmb_enable_device(struct zpci_dev *); 222 int zpci_fmb_disable_device(struct zpci_dev *); 223 224 /* Debug */ 225 int zpci_debug_init(void); 226 void zpci_debug_exit(void); 227 void zpci_debug_init_device(struct zpci_dev *, const char *); 228 void zpci_debug_exit_device(struct zpci_dev *); 229 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 230 231 /* Error reporting */ 232 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 233 234 #ifdef CONFIG_NUMA 235 236 /* Returns the node based on PCI bus */ 237 static inline int __pcibus_to_node(const struct pci_bus *bus) 238 { 239 return NUMA_NO_NODE; 240 } 241 242 static inline const struct cpumask * 243 cpumask_of_pcibus(const struct pci_bus *bus) 244 { 245 return cpu_online_mask; 246 } 247 248 #endif /* CONFIG_NUMA */ 249 250 #endif 251