1 #ifndef __ASM_S390_PCI_H 2 #define __ASM_S390_PCI_H 3 4 /* must be set before including asm-generic/pci.h */ 5 #define PCI_DMA_BUS_IS_PHYS (0) 6 /* must be set before including pci_clp.h */ 7 #define PCI_BAR_COUNT 6 8 9 #include <asm-generic/pci.h> 10 #include <asm-generic/pci-dma-compat.h> 11 #include <asm/pci_clp.h> 12 #include <asm/pci_debug.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 /* PCI Function Controls */ 28 #define ZPCI_FC_FN_ENABLED 0x80 29 #define ZPCI_FC_ERROR 0x40 30 #define ZPCI_FC_BLOCKED 0x20 31 #define ZPCI_FC_DMA_ENABLED 0x10 32 33 struct zpci_fmb { 34 u32 format : 8; 35 u32 dma_valid : 1; 36 u32 : 23; 37 u32 samples; 38 u64 last_update; 39 /* hardware counters */ 40 u64 ld_ops; 41 u64 st_ops; 42 u64 stb_ops; 43 u64 rpcit_ops; 44 u64 dma_rbytes; 45 u64 dma_wbytes; 46 /* software counters */ 47 atomic64_t allocated_pages; 48 atomic64_t mapped_pages; 49 atomic64_t unmapped_pages; 50 } __packed __aligned(16); 51 52 struct msi_map { 53 unsigned long irq; 54 struct msi_desc *msi; 55 struct hlist_node msi_chain; 56 }; 57 58 #define ZPCI_NR_MSI_VECS 64 59 #define ZPCI_MSI_MASK (ZPCI_NR_MSI_VECS - 1) 60 61 enum zpci_state { 62 ZPCI_FN_STATE_RESERVED, 63 ZPCI_FN_STATE_STANDBY, 64 ZPCI_FN_STATE_CONFIGURED, 65 ZPCI_FN_STATE_ONLINE, 66 NR_ZPCI_FN_STATES, 67 }; 68 69 struct zpci_bar_struct { 70 u32 val; /* bar start & 3 flag bits */ 71 u8 size; /* order 2 exponent */ 72 u16 map_idx; /* index into bar mapping array */ 73 }; 74 75 /* Private data per function */ 76 struct zpci_dev { 77 struct pci_dev *pdev; 78 struct pci_bus *bus; 79 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 80 81 enum zpci_state state; 82 u32 fid; /* function ID, used by sclp */ 83 u32 fh; /* function handle, used by insn's */ 84 u16 pchid; /* physical channel ID */ 85 u8 pfgid; /* function group ID */ 86 u16 domain; 87 88 /* IRQ stuff */ 89 u64 msi_addr; /* MSI address */ 90 struct zdev_irq_map *irq_map; 91 struct msi_map *msi_map[ZPCI_NR_MSI_VECS]; 92 unsigned int aisb; /* number of the summary bit */ 93 94 /* DMA stuff */ 95 unsigned long *dma_table; 96 spinlock_t dma_table_lock; 97 int tlb_refresh; 98 99 spinlock_t iommu_bitmap_lock; 100 unsigned long *iommu_bitmap; 101 unsigned long iommu_size; 102 unsigned long iommu_pages; 103 unsigned int next_bit; 104 105 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 106 107 u64 start_dma; /* Start of available DMA addresses */ 108 u64 end_dma; /* End of available DMA addresses */ 109 u64 dma_mask; /* DMA address space mask */ 110 111 /* Function measurement block */ 112 struct zpci_fmb *fmb; 113 u16 fmb_update; /* update interval */ 114 115 enum pci_bus_speed max_bus_speed; 116 117 struct dentry *debugfs_dev; 118 struct dentry *debugfs_perf; 119 }; 120 121 struct pci_hp_callback_ops { 122 int (*create_slot) (struct zpci_dev *zdev); 123 void (*remove_slot) (struct zpci_dev *zdev); 124 }; 125 126 static inline bool zdev_enabled(struct zpci_dev *zdev) 127 { 128 return (zdev->fh & (1UL << 31)) ? true : false; 129 } 130 131 /* ----------------------------------------------------------------------------- 132 Prototypes 133 ----------------------------------------------------------------------------- */ 134 /* Base stuff */ 135 struct zpci_dev *zpci_alloc_device(void); 136 int zpci_create_device(struct zpci_dev *); 137 int zpci_enable_device(struct zpci_dev *); 138 int zpci_disable_device(struct zpci_dev *); 139 void zpci_stop_device(struct zpci_dev *); 140 void zpci_free_device(struct zpci_dev *); 141 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 142 int zpci_unregister_ioat(struct zpci_dev *, u8); 143 144 /* CLP */ 145 int clp_find_pci_devices(void); 146 int clp_add_pci_device(u32, u32, int); 147 int clp_enable_fh(struct zpci_dev *, u8); 148 int clp_disable_fh(struct zpci_dev *); 149 150 /* MSI */ 151 struct msi_desc *__irq_get_msi_desc(unsigned int); 152 int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32); 153 int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int); 154 void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *); 155 int zpci_msihash_init(void); 156 void zpci_msihash_exit(void); 157 158 #ifdef CONFIG_PCI 159 /* Error handling and recovery */ 160 void zpci_event_error(void *); 161 void zpci_event_availability(void *); 162 #else /* CONFIG_PCI */ 163 static inline void zpci_event_error(void *e) {} 164 static inline void zpci_event_availability(void *e) {} 165 #endif /* CONFIG_PCI */ 166 167 /* Helpers */ 168 struct zpci_dev *get_zdev(struct pci_dev *); 169 struct zpci_dev *get_zdev_by_fid(u32); 170 bool zpci_fid_present(u32); 171 172 /* sysfs */ 173 int zpci_sysfs_add_device(struct device *); 174 void zpci_sysfs_remove_device(struct device *); 175 176 /* DMA */ 177 int zpci_dma_init(void); 178 void zpci_dma_exit(void); 179 180 /* Hotplug */ 181 extern struct mutex zpci_list_lock; 182 extern struct list_head zpci_list; 183 extern unsigned int s390_pci_probe; 184 185 void zpci_register_hp_ops(struct pci_hp_callback_ops *); 186 void zpci_deregister_hp_ops(void); 187 188 /* FMB */ 189 int zpci_fmb_enable_device(struct zpci_dev *); 190 int zpci_fmb_disable_device(struct zpci_dev *); 191 192 /* Debug */ 193 int zpci_debug_init(void); 194 void zpci_debug_exit(void); 195 void zpci_debug_init_device(struct zpci_dev *); 196 void zpci_debug_exit_device(struct zpci_dev *); 197 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 198 199 #endif 200