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 #define ZPCI_NR_DMA_SPACES 1 30 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS 31 32 /* PCI Function Controls */ 33 #define ZPCI_FC_FN_ENABLED 0x80 34 #define ZPCI_FC_ERROR 0x40 35 #define ZPCI_FC_BLOCKED 0x20 36 #define ZPCI_FC_DMA_ENABLED 0x10 37 38 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 39 40 struct zpci_fmb_fmt0 { 41 u64 dma_rbytes; 42 u64 dma_wbytes; 43 }; 44 45 struct zpci_fmb_fmt1 { 46 u64 rx_bytes; 47 u64 rx_packets; 48 u64 tx_bytes; 49 u64 tx_packets; 50 }; 51 52 struct zpci_fmb_fmt2 { 53 u64 consumed_work_units; 54 u64 max_work_units; 55 }; 56 57 struct zpci_fmb_fmt3 { 58 u64 tx_bytes; 59 }; 60 61 struct zpci_fmb { 62 u32 format : 8; 63 u32 fmt_ind : 24; 64 u32 samples; 65 u64 last_update; 66 /* common counters */ 67 u64 ld_ops; 68 u64 st_ops; 69 u64 stb_ops; 70 u64 rpcit_ops; 71 /* format specific counters */ 72 union { 73 struct zpci_fmb_fmt0 fmt0; 74 struct zpci_fmb_fmt1 fmt1; 75 struct zpci_fmb_fmt2 fmt2; 76 struct zpci_fmb_fmt3 fmt3; 77 }; 78 } __packed __aligned(128); 79 80 enum zpci_state { 81 ZPCI_FN_STATE_STANDBY = 0, 82 ZPCI_FN_STATE_CONFIGURED = 1, 83 ZPCI_FN_STATE_RESERVED = 2, 84 ZPCI_FN_STATE_ONLINE = 3, 85 }; 86 87 struct zpci_bar_struct { 88 struct resource *res; /* bus resource */ 89 void __iomem *mio_wb; 90 void __iomem *mio_wt; 91 u32 val; /* bar start & 3 flag bits */ 92 u16 map_idx; /* index into bar mapping array */ 93 u8 size; /* order 2 exponent */ 94 }; 95 96 struct s390_domain; 97 98 /* Private data per function */ 99 struct zpci_dev { 100 struct pci_bus *bus; 101 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 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; 111 112 struct mutex lock; 113 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 114 u32 uid; /* user defined id */ 115 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 116 117 /* IRQ stuff */ 118 u64 msi_addr; /* MSI address */ 119 unsigned int max_msi; /* maximum number of MSI's */ 120 unsigned int msi_first_bit; 121 unsigned int msi_nr_irqs; 122 struct airq_iv *aibv; /* adapter interrupt bit vector */ 123 unsigned long aisb; /* number of the summary bit */ 124 125 /* DMA stuff */ 126 unsigned long *dma_table; 127 spinlock_t dma_table_lock; 128 int tlb_refresh; 129 130 spinlock_t iommu_bitmap_lock; 131 unsigned long *iommu_bitmap; 132 unsigned long *lazy_bitmap; 133 unsigned long iommu_size; 134 unsigned long iommu_pages; 135 unsigned int next_bit; 136 137 struct iommu_device iommu_dev; /* IOMMU core handle */ 138 139 char res_name[16]; 140 bool mio_capable; 141 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 142 143 u64 start_dma; /* Start of available DMA addresses */ 144 u64 end_dma; /* End of available DMA addresses */ 145 u64 dma_mask; /* DMA address space mask */ 146 147 /* Function measurement block */ 148 struct zpci_fmb *fmb; 149 u16 fmb_update; /* update interval */ 150 u16 fmb_length; 151 /* software counters */ 152 atomic64_t allocated_pages; 153 atomic64_t mapped_pages; 154 atomic64_t unmapped_pages; 155 156 enum pci_bus_speed max_bus_speed; 157 158 struct dentry *debugfs_dev; 159 160 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 161 }; 162 163 static inline bool zdev_enabled(struct zpci_dev *zdev) 164 { 165 return (zdev->fh & (1UL << 31)) ? true : false; 166 } 167 168 extern const struct attribute_group *zpci_attr_groups[]; 169 extern unsigned int s390_pci_force_floating __initdata; 170 171 /* ----------------------------------------------------------------------------- 172 Prototypes 173 ----------------------------------------------------------------------------- */ 174 /* Base stuff */ 175 int zpci_create_device(struct zpci_dev *); 176 void zpci_remove_device(struct zpci_dev *zdev); 177 int zpci_enable_device(struct zpci_dev *); 178 int zpci_disable_device(struct zpci_dev *); 179 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 180 int zpci_unregister_ioat(struct zpci_dev *, u8); 181 void zpci_remove_reserved_devices(void); 182 183 /* CLP */ 184 int clp_scan_pci_devices(void); 185 int clp_rescan_pci_devices(void); 186 int clp_rescan_pci_devices_simple(void); 187 int clp_add_pci_device(u32, u32, int); 188 int clp_enable_fh(struct zpci_dev *, u8); 189 int clp_disable_fh(struct zpci_dev *); 190 int clp_get_state(u32 fid, enum zpci_state *state); 191 192 /* IOMMU Interface */ 193 int zpci_init_iommu(struct zpci_dev *zdev); 194 void zpci_destroy_iommu(struct zpci_dev *zdev); 195 196 #ifdef CONFIG_PCI 197 /* Error handling and recovery */ 198 void zpci_event_error(void *); 199 void zpci_event_availability(void *); 200 void zpci_rescan(void); 201 bool zpci_is_enabled(void); 202 #else /* CONFIG_PCI */ 203 static inline void zpci_event_error(void *e) {} 204 static inline void zpci_event_availability(void *e) {} 205 static inline void zpci_rescan(void) {} 206 #endif /* CONFIG_PCI */ 207 208 #ifdef CONFIG_HOTPLUG_PCI_S390 209 int zpci_init_slot(struct zpci_dev *); 210 void zpci_exit_slot(struct zpci_dev *); 211 #else /* CONFIG_HOTPLUG_PCI_S390 */ 212 static inline int zpci_init_slot(struct zpci_dev *zdev) 213 { 214 return 0; 215 } 216 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 217 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 218 219 /* Helpers */ 220 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 221 { 222 return pdev->sysdata; 223 } 224 225 struct zpci_dev *get_zdev_by_fid(u32); 226 227 /* DMA */ 228 int zpci_dma_init(void); 229 void zpci_dma_exit(void); 230 231 int __init zpci_irq_init(void); 232 void __init zpci_irq_exit(void); 233 234 /* FMB */ 235 int zpci_fmb_enable_device(struct zpci_dev *); 236 int zpci_fmb_disable_device(struct zpci_dev *); 237 238 /* Debug */ 239 int zpci_debug_init(void); 240 void zpci_debug_exit(void); 241 void zpci_debug_init_device(struct zpci_dev *, const char *); 242 void zpci_debug_exit_device(struct zpci_dev *); 243 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 244 245 /* Error reporting */ 246 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 247 248 #ifdef CONFIG_NUMA 249 250 /* Returns the node based on PCI bus */ 251 static inline int __pcibus_to_node(const struct pci_bus *bus) 252 { 253 return NUMA_NO_NODE; 254 } 255 256 static inline const struct cpumask * 257 cpumask_of_pcibus(const struct pci_bus *bus) 258 { 259 return cpu_online_mask; 260 } 261 262 #endif /* CONFIG_NUMA */ 263 264 #endif 265