1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_S390_PCI_H 3 #define __ASM_S390_PCI_H 4 5 #include <linux/pci.h> 6 #include <linux/mutex.h> 7 #include <linux/iommu.h> 8 #include <linux/pci_hotplug.h> 9 #include <asm-generic/pci.h> 10 #include <asm/pci_clp.h> 11 #include <asm/pci_debug.h> 12 #include <asm/sclp.h> 13 14 #define PCIBIOS_MIN_IO 0x1000 15 #define PCIBIOS_MIN_MEM 0x10000000 16 17 #define pcibios_assign_all_busses() (0) 18 19 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 20 void pci_iounmap(struct pci_dev *, void __iomem *); 21 int pci_domain_nr(struct pci_bus *); 22 int pci_proc_domain(struct pci_bus *); 23 24 #define ZPCI_BUS_NR 0 /* default bus number */ 25 #define ZPCI_DEVFN 0 /* default device number */ 26 27 #define ZPCI_NR_DMA_SPACES 1 28 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS 29 #define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16) 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_fmt3 { 57 u64 tx_bytes; 58 }; 59 60 struct zpci_fmb { 61 u32 format : 8; 62 u32 fmt_ind : 24; 63 u32 samples; 64 u64 last_update; 65 /* common counters */ 66 u64 ld_ops; 67 u64 st_ops; 68 u64 stb_ops; 69 u64 rpcit_ops; 70 /* format specific counters */ 71 union { 72 struct zpci_fmb_fmt0 fmt0; 73 struct zpci_fmb_fmt1 fmt1; 74 struct zpci_fmb_fmt2 fmt2; 75 struct zpci_fmb_fmt3 fmt3; 76 }; 77 } __packed __aligned(128); 78 79 enum zpci_state { 80 ZPCI_FN_STATE_STANDBY = 0, 81 ZPCI_FN_STATE_CONFIGURED = 1, 82 ZPCI_FN_STATE_RESERVED = 2, 83 ZPCI_FN_STATE_ONLINE = 3, 84 }; 85 86 struct zpci_bar_struct { 87 struct resource *res; /* bus resource */ 88 void __iomem *mio_wb; 89 void __iomem *mio_wt; 90 u32 val; /* bar start & 3 flag bits */ 91 u16 map_idx; /* index into bar mapping array */ 92 u8 size; /* order 2 exponent */ 93 }; 94 95 struct s390_domain; 96 97 /* Private data per function */ 98 struct zpci_dev { 99 struct pci_bus *bus; 100 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 101 struct hotplug_slot hotplug_slot; 102 103 enum zpci_state state; 104 u32 fid; /* function ID, used by sclp */ 105 u32 fh; /* function handle, used by insn's */ 106 u16 vfn; /* virtual function number */ 107 u16 pchid; /* physical channel ID */ 108 u8 pfgid; /* function group ID */ 109 u8 pft; /* pci function type */ 110 u16 domain; 111 u8 port; 112 113 struct mutex lock; 114 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 115 u32 uid; /* user defined id */ 116 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 117 118 /* IRQ stuff */ 119 u64 msi_addr; /* MSI address */ 120 unsigned int max_msi; /* maximum number of MSI's */ 121 unsigned int msi_first_bit; 122 unsigned int msi_nr_irqs; 123 struct airq_iv *aibv; /* adapter interrupt bit vector */ 124 unsigned long aisb; /* number of the summary bit */ 125 126 /* DMA stuff */ 127 unsigned long *dma_table; 128 spinlock_t dma_table_lock; 129 int tlb_refresh; 130 131 spinlock_t iommu_bitmap_lock; 132 unsigned long *iommu_bitmap; 133 unsigned long *lazy_bitmap; 134 unsigned long iommu_size; 135 unsigned long iommu_pages; 136 unsigned int next_bit; 137 138 struct iommu_device iommu_dev; /* IOMMU core handle */ 139 140 char res_name[16]; 141 bool mio_capable; 142 struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; 143 144 u64 start_dma; /* Start of available DMA addresses */ 145 u64 end_dma; /* End of available DMA addresses */ 146 u64 dma_mask; /* DMA address space mask */ 147 148 /* Function measurement block */ 149 struct zpci_fmb *fmb; 150 u16 fmb_update; /* update interval */ 151 u16 fmb_length; 152 /* software counters */ 153 atomic64_t allocated_pages; 154 atomic64_t mapped_pages; 155 atomic64_t unmapped_pages; 156 157 enum pci_bus_speed max_bus_speed; 158 159 struct dentry *debugfs_dev; 160 161 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 162 }; 163 164 static inline bool zdev_enabled(struct zpci_dev *zdev) 165 { 166 return (zdev->fh & (1UL << 31)) ? true : false; 167 } 168 169 extern const struct attribute_group *zpci_attr_groups[]; 170 extern unsigned int s390_pci_force_floating __initdata; 171 172 /* ----------------------------------------------------------------------------- 173 Prototypes 174 ----------------------------------------------------------------------------- */ 175 /* Base stuff */ 176 int zpci_create_device(struct zpci_dev *); 177 void zpci_remove_device(struct zpci_dev *zdev); 178 int zpci_enable_device(struct zpci_dev *); 179 int zpci_disable_device(struct zpci_dev *); 180 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 181 int zpci_unregister_ioat(struct zpci_dev *, u8); 182 void zpci_remove_reserved_devices(void); 183 184 /* CLP */ 185 int clp_scan_pci_devices(void); 186 int clp_rescan_pci_devices(void); 187 int clp_rescan_pci_devices_simple(u32 *fid); 188 int clp_add_pci_device(u32, u32, int); 189 int clp_enable_fh(struct zpci_dev *, u8); 190 int clp_disable_fh(struct zpci_dev *); 191 int clp_get_state(u32 fid, enum zpci_state *state); 192 193 /* UID */ 194 void update_uid_checking(bool new); 195 196 /* IOMMU Interface */ 197 int zpci_init_iommu(struct zpci_dev *zdev); 198 void zpci_destroy_iommu(struct zpci_dev *zdev); 199 200 #ifdef CONFIG_PCI 201 static inline bool zpci_use_mio(struct zpci_dev *zdev) 202 { 203 return static_branch_likely(&have_mio) && zdev->mio_capable; 204 } 205 206 /* Error handling and recovery */ 207 void zpci_event_error(void *); 208 void zpci_event_availability(void *); 209 void zpci_rescan(void); 210 bool zpci_is_enabled(void); 211 #else /* CONFIG_PCI */ 212 static inline void zpci_event_error(void *e) {} 213 static inline void zpci_event_availability(void *e) {} 214 static inline void zpci_rescan(void) {} 215 #endif /* CONFIG_PCI */ 216 217 #ifdef CONFIG_HOTPLUG_PCI_S390 218 int zpci_init_slot(struct zpci_dev *); 219 void zpci_exit_slot(struct zpci_dev *); 220 #else /* CONFIG_HOTPLUG_PCI_S390 */ 221 static inline int zpci_init_slot(struct zpci_dev *zdev) 222 { 223 return 0; 224 } 225 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 226 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 227 228 /* Helpers */ 229 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 230 { 231 return pdev->sysdata; 232 } 233 234 static inline struct zpci_dev *to_zpci_dev(struct device *dev) 235 { 236 return to_zpci(to_pci_dev(dev)); 237 } 238 239 struct zpci_dev *get_zdev_by_fid(u32); 240 241 /* DMA */ 242 int zpci_dma_init(void); 243 void zpci_dma_exit(void); 244 245 int __init zpci_irq_init(void); 246 void __init zpci_irq_exit(void); 247 248 /* FMB */ 249 int zpci_fmb_enable_device(struct zpci_dev *); 250 int zpci_fmb_disable_device(struct zpci_dev *); 251 252 /* Debug */ 253 int zpci_debug_init(void); 254 void zpci_debug_exit(void); 255 void zpci_debug_init_device(struct zpci_dev *, const char *); 256 void zpci_debug_exit_device(struct zpci_dev *); 257 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 258 259 /* Error reporting */ 260 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 261 262 #ifdef CONFIG_NUMA 263 264 /* Returns the node based on PCI bus */ 265 static inline int __pcibus_to_node(const struct pci_bus *bus) 266 { 267 return NUMA_NO_NODE; 268 } 269 270 static inline const struct cpumask * 271 cpumask_of_pcibus(const struct pci_bus *bus) 272 { 273 return cpu_online_mask; 274 } 275 276 #endif /* CONFIG_NUMA */ 277 278 #endif 279