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 30 /* PCI Function Controls */ 31 #define ZPCI_FC_FN_ENABLED 0x80 32 #define ZPCI_FC_ERROR 0x40 33 #define ZPCI_FC_BLOCKED 0x20 34 #define ZPCI_FC_DMA_ENABLED 0x10 35 36 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 37 38 struct zpci_fmb_fmt0 { 39 u64 dma_rbytes; 40 u64 dma_wbytes; 41 }; 42 43 struct zpci_fmb_fmt1 { 44 u64 rx_bytes; 45 u64 rx_packets; 46 u64 tx_bytes; 47 u64 tx_packets; 48 }; 49 50 struct zpci_fmb_fmt2 { 51 u64 consumed_work_units; 52 u64 max_work_units; 53 }; 54 55 struct zpci_fmb_fmt3 { 56 u64 tx_bytes; 57 }; 58 59 struct zpci_fmb { 60 u32 format : 8; 61 u32 fmt_ind : 24; 62 u32 samples; 63 u64 last_update; 64 /* common counters */ 65 u64 ld_ops; 66 u64 st_ops; 67 u64 stb_ops; 68 u64 rpcit_ops; 69 /* format specific counters */ 70 union { 71 struct zpci_fmb_fmt0 fmt0; 72 struct zpci_fmb_fmt1 fmt1; 73 struct zpci_fmb_fmt2 fmt2; 74 struct zpci_fmb_fmt3 fmt3; 75 }; 76 } __packed __aligned(128); 77 78 enum zpci_state { 79 ZPCI_FN_STATE_STANDBY = 0, 80 ZPCI_FN_STATE_CONFIGURED = 1, 81 ZPCI_FN_STATE_RESERVED = 2, 82 ZPCI_FN_STATE_ONLINE = 3, 83 }; 84 85 struct zpci_bar_struct { 86 struct resource *res; /* bus resource */ 87 void __iomem *mio_wb; 88 void __iomem *mio_wt; 89 u32 val; /* bar start & 3 flag bits */ 90 u16 map_idx; /* index into bar mapping array */ 91 u8 size; /* order 2 exponent */ 92 }; 93 94 struct s390_domain; 95 96 /* Private data per function */ 97 struct zpci_dev { 98 struct pci_bus *bus; 99 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 100 struct hotplug_slot hotplug_slot; 101 102 enum zpci_state state; 103 u32 fid; /* function ID, used by sclp */ 104 u32 fh; /* function handle, used by insn's */ 105 u16 vfn; /* virtual function number */ 106 u16 pchid; /* physical channel ID */ 107 u8 pfgid; /* function group ID */ 108 u8 pft; /* pci function type */ 109 u16 domain; 110 111 struct mutex lock; 112 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 113 u32 uid; /* user defined id */ 114 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 115 116 /* IRQ stuff */ 117 u64 msi_addr; /* MSI address */ 118 unsigned int max_msi; /* maximum number of MSI's */ 119 unsigned int msi_first_bit; 120 unsigned int msi_nr_irqs; 121 struct airq_iv *aibv; /* adapter interrupt bit vector */ 122 unsigned long aisb; /* number of the summary bit */ 123 124 /* DMA stuff */ 125 unsigned long *dma_table; 126 spinlock_t dma_table_lock; 127 int tlb_refresh; 128 129 spinlock_t iommu_bitmap_lock; 130 unsigned long *iommu_bitmap; 131 unsigned long *lazy_bitmap; 132 unsigned long iommu_size; 133 unsigned long iommu_pages; 134 unsigned int next_bit; 135 136 struct iommu_device iommu_dev; /* IOMMU core handle */ 137 138 char res_name[16]; 139 bool mio_capable; 140 struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; 141 142 u64 start_dma; /* Start of available DMA addresses */ 143 u64 end_dma; /* End of available DMA addresses */ 144 u64 dma_mask; /* DMA address space mask */ 145 146 /* Function measurement block */ 147 struct zpci_fmb *fmb; 148 u16 fmb_update; /* update interval */ 149 u16 fmb_length; 150 /* software counters */ 151 atomic64_t allocated_pages; 152 atomic64_t mapped_pages; 153 atomic64_t unmapped_pages; 154 155 enum pci_bus_speed max_bus_speed; 156 157 struct dentry *debugfs_dev; 158 159 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 160 }; 161 162 static inline bool zdev_enabled(struct zpci_dev *zdev) 163 { 164 return (zdev->fh & (1UL << 31)) ? true : false; 165 } 166 167 extern const struct attribute_group *zpci_attr_groups[]; 168 extern unsigned int s390_pci_force_floating __initdata; 169 170 /* ----------------------------------------------------------------------------- 171 Prototypes 172 ----------------------------------------------------------------------------- */ 173 /* Base stuff */ 174 int zpci_create_device(struct zpci_dev *); 175 void zpci_remove_device(struct zpci_dev *zdev); 176 int zpci_enable_device(struct zpci_dev *); 177 int zpci_disable_device(struct zpci_dev *); 178 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 179 int zpci_unregister_ioat(struct zpci_dev *, u8); 180 void zpci_remove_reserved_devices(void); 181 182 /* CLP */ 183 int clp_scan_pci_devices(void); 184 int clp_rescan_pci_devices(void); 185 int clp_rescan_pci_devices_simple(u32 *fid); 186 int clp_add_pci_device(u32, u32, int); 187 int clp_enable_fh(struct zpci_dev *, u8); 188 int clp_disable_fh(struct zpci_dev *); 189 int clp_get_state(u32 fid, enum zpci_state *state); 190 191 /* IOMMU Interface */ 192 int zpci_init_iommu(struct zpci_dev *zdev); 193 void zpci_destroy_iommu(struct zpci_dev *zdev); 194 195 #ifdef CONFIG_PCI 196 static inline bool zpci_use_mio(struct zpci_dev *zdev) 197 { 198 return static_branch_likely(&have_mio) && zdev->mio_capable; 199 } 200 201 /* Error handling and recovery */ 202 void zpci_event_error(void *); 203 void zpci_event_availability(void *); 204 void zpci_rescan(void); 205 bool zpci_is_enabled(void); 206 #else /* CONFIG_PCI */ 207 static inline void zpci_event_error(void *e) {} 208 static inline void zpci_event_availability(void *e) {} 209 static inline void zpci_rescan(void) {} 210 #endif /* CONFIG_PCI */ 211 212 #ifdef CONFIG_HOTPLUG_PCI_S390 213 int zpci_init_slot(struct zpci_dev *); 214 void zpci_exit_slot(struct zpci_dev *); 215 #else /* CONFIG_HOTPLUG_PCI_S390 */ 216 static inline int zpci_init_slot(struct zpci_dev *zdev) 217 { 218 return 0; 219 } 220 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 221 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 222 223 /* Helpers */ 224 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 225 { 226 return pdev->sysdata; 227 } 228 229 struct zpci_dev *get_zdev_by_fid(u32); 230 231 /* DMA */ 232 int zpci_dma_init(void); 233 void zpci_dma_exit(void); 234 235 int __init zpci_irq_init(void); 236 void __init zpci_irq_exit(void); 237 238 /* FMB */ 239 int zpci_fmb_enable_device(struct zpci_dev *); 240 int zpci_fmb_disable_device(struct zpci_dev *); 241 242 /* Debug */ 243 int zpci_debug_init(void); 244 void zpci_debug_exit(void); 245 void zpci_debug_init_device(struct zpci_dev *, const char *); 246 void zpci_debug_exit_device(struct zpci_dev *); 247 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 248 249 /* Error reporting */ 250 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 251 252 #ifdef CONFIG_NUMA 253 254 /* Returns the node based on PCI bus */ 255 static inline int __pcibus_to_node(const struct pci_bus *bus) 256 { 257 return NUMA_NO_NODE; 258 } 259 260 static inline const struct cpumask * 261 cpumask_of_pcibus(const struct pci_bus *bus) 262 { 263 return cpu_online_mask; 264 } 265 266 #endif /* CONFIG_NUMA */ 267 268 #endif 269