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 /* MSI arch hooks */ 25 #define arch_setup_msi_irqs arch_setup_msi_irqs 26 #define arch_teardown_msi_irqs arch_teardown_msi_irqs 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 struct zpci_fmb { 38 u32 format : 8; 39 u32 dma_valid : 1; 40 u32 : 23; 41 u32 samples; 42 u64 last_update; 43 /* hardware counters */ 44 u64 ld_ops; 45 u64 st_ops; 46 u64 stb_ops; 47 u64 rpcit_ops; 48 u64 dma_rbytes; 49 u64 dma_wbytes; 50 /* software counters */ 51 atomic64_t allocated_pages; 52 atomic64_t mapped_pages; 53 atomic64_t unmapped_pages; 54 } __packed __aligned(16); 55 56 struct msi_map { 57 unsigned long irq; 58 struct msi_desc *msi; 59 struct hlist_node msi_chain; 60 }; 61 62 #define ZPCI_NR_MSI_VECS 64 63 #define ZPCI_MSI_MASK (ZPCI_NR_MSI_VECS - 1) 64 65 enum zpci_state { 66 ZPCI_FN_STATE_RESERVED, 67 ZPCI_FN_STATE_STANDBY, 68 ZPCI_FN_STATE_CONFIGURED, 69 ZPCI_FN_STATE_ONLINE, 70 NR_ZPCI_FN_STATES, 71 }; 72 73 struct zpci_bar_struct { 74 u32 val; /* bar start & 3 flag bits */ 75 u8 size; /* order 2 exponent */ 76 u16 map_idx; /* index into bar mapping array */ 77 }; 78 79 /* Private data per function */ 80 struct zpci_dev { 81 struct pci_dev *pdev; 82 struct pci_bus *bus; 83 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 84 85 enum zpci_state state; 86 u32 fid; /* function ID, used by sclp */ 87 u32 fh; /* function handle, used by insn's */ 88 u16 pchid; /* physical channel ID */ 89 u8 pfgid; /* function group ID */ 90 u16 domain; 91 92 /* IRQ stuff */ 93 u64 msi_addr; /* MSI address */ 94 struct zdev_irq_map *irq_map; 95 struct msi_map *msi_map[ZPCI_NR_MSI_VECS]; 96 unsigned int aisb; /* number of the summary bit */ 97 98 /* DMA stuff */ 99 unsigned long *dma_table; 100 spinlock_t dma_table_lock; 101 int tlb_refresh; 102 103 spinlock_t iommu_bitmap_lock; 104 unsigned long *iommu_bitmap; 105 unsigned long iommu_size; 106 unsigned long iommu_pages; 107 unsigned int next_bit; 108 109 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 110 111 u64 start_dma; /* Start of available DMA addresses */ 112 u64 end_dma; /* End of available DMA addresses */ 113 u64 dma_mask; /* DMA address space mask */ 114 115 /* Function measurement block */ 116 struct zpci_fmb *fmb; 117 u16 fmb_update; /* update interval */ 118 119 enum pci_bus_speed max_bus_speed; 120 121 struct dentry *debugfs_dev; 122 struct dentry *debugfs_perf; 123 struct dentry *debugfs_debug; 124 }; 125 126 struct pci_hp_callback_ops { 127 int (*create_slot) (struct zpci_dev *zdev); 128 void (*remove_slot) (struct zpci_dev *zdev); 129 }; 130 131 static inline bool zdev_enabled(struct zpci_dev *zdev) 132 { 133 return (zdev->fh & (1UL << 31)) ? true : false; 134 } 135 136 /* ----------------------------------------------------------------------------- 137 Prototypes 138 ----------------------------------------------------------------------------- */ 139 /* Base stuff */ 140 struct zpci_dev *zpci_alloc_device(void); 141 int zpci_create_device(struct zpci_dev *); 142 int zpci_enable_device(struct zpci_dev *); 143 void zpci_stop_device(struct zpci_dev *); 144 void zpci_free_device(struct zpci_dev *); 145 int zpci_scan_device(struct zpci_dev *); 146 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 147 int zpci_unregister_ioat(struct zpci_dev *, u8); 148 149 /* CLP */ 150 int clp_find_pci_devices(void); 151 int clp_add_pci_device(u32, u32, int); 152 int clp_enable_fh(struct zpci_dev *, u8); 153 int clp_disable_fh(struct zpci_dev *); 154 155 /* MSI */ 156 struct msi_desc *__irq_get_msi_desc(unsigned int); 157 int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32); 158 int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int); 159 void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *); 160 int zpci_msihash_init(void); 161 void zpci_msihash_exit(void); 162 163 #ifdef CONFIG_PCI 164 /* Error handling and recovery */ 165 void zpci_event_error(void *); 166 void zpci_event_availability(void *); 167 #else /* CONFIG_PCI */ 168 static inline void zpci_event_error(void *e) {} 169 static inline void zpci_event_availability(void *e) {} 170 #endif /* CONFIG_PCI */ 171 172 /* Helpers */ 173 struct zpci_dev *get_zdev(struct pci_dev *); 174 struct zpci_dev *get_zdev_by_fid(u32); 175 bool zpci_fid_present(u32); 176 177 /* sysfs */ 178 int zpci_sysfs_add_device(struct device *); 179 void zpci_sysfs_remove_device(struct device *); 180 181 /* DMA */ 182 int zpci_dma_init(void); 183 void zpci_dma_exit(void); 184 185 /* Hotplug */ 186 extern struct mutex zpci_list_lock; 187 extern struct list_head zpci_list; 188 extern struct pci_hp_callback_ops hotplug_ops; 189 extern unsigned int pci_probe; 190 191 /* FMB */ 192 int zpci_fmb_enable_device(struct zpci_dev *); 193 int zpci_fmb_disable_device(struct zpci_dev *); 194 195 /* Debug */ 196 int zpci_debug_init(void); 197 void zpci_debug_exit(void); 198 void zpci_debug_init_device(struct zpci_dev *); 199 void zpci_debug_exit_device(struct zpci_dev *); 200 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 201 202 #endif 203