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 13 #define PCIBIOS_MIN_IO 0x1000 14 #define PCIBIOS_MIN_MEM 0x10000000 15 16 #define pcibios_assign_all_busses() (0) 17 18 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 19 void pci_iounmap(struct pci_dev *, void __iomem *); 20 int pci_domain_nr(struct pci_bus *); 21 int pci_proc_domain(struct pci_bus *); 22 23 /* MSI arch hooks */ 24 #define arch_setup_msi_irqs arch_setup_msi_irqs 25 #define arch_teardown_msi_irqs arch_teardown_msi_irqs 26 27 #define ZPCI_BUS_NR 0 /* default bus number */ 28 #define ZPCI_DEVFN 0 /* default device number */ 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 struct msi_map { 37 unsigned long irq; 38 struct msi_desc *msi; 39 struct hlist_node msi_chain; 40 }; 41 42 #define ZPCI_NR_MSI_VECS 64 43 #define ZPCI_MSI_MASK (ZPCI_NR_MSI_VECS - 1) 44 45 enum zpci_state { 46 ZPCI_FN_STATE_RESERVED, 47 ZPCI_FN_STATE_STANDBY, 48 ZPCI_FN_STATE_CONFIGURED, 49 ZPCI_FN_STATE_ONLINE, 50 NR_ZPCI_FN_STATES, 51 }; 52 53 struct zpci_bar_struct { 54 u32 val; /* bar start & 3 flag bits */ 55 u8 size; /* order 2 exponent */ 56 u16 map_idx; /* index into bar mapping array */ 57 }; 58 59 /* Private data per function */ 60 struct zpci_dev { 61 struct pci_dev *pdev; 62 struct pci_bus *bus; 63 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 64 65 enum zpci_state state; 66 u32 fid; /* function ID, used by sclp */ 67 u32 fh; /* function handle, used by insn's */ 68 u16 pchid; /* physical channel ID */ 69 u8 pfgid; /* function group ID */ 70 u16 domain; 71 72 /* IRQ stuff */ 73 u64 msi_addr; /* MSI address */ 74 struct zdev_irq_map *irq_map; 75 struct msi_map *msi_map[ZPCI_NR_MSI_VECS]; 76 unsigned int aisb; /* number of the summary bit */ 77 78 /* DMA stuff */ 79 unsigned long *dma_table; 80 spinlock_t dma_table_lock; 81 int tlb_refresh; 82 83 spinlock_t iommu_bitmap_lock; 84 unsigned long *iommu_bitmap; 85 unsigned long iommu_size; 86 unsigned long iommu_pages; 87 unsigned int next_bit; 88 89 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 90 91 u64 start_dma; /* Start of available DMA addresses */ 92 u64 end_dma; /* End of available DMA addresses */ 93 u64 dma_mask; /* DMA address space mask */ 94 95 enum pci_bus_speed max_bus_speed; 96 }; 97 98 struct pci_hp_callback_ops { 99 int (*create_slot) (struct zpci_dev *zdev); 100 void (*remove_slot) (struct zpci_dev *zdev); 101 }; 102 103 static inline bool zdev_enabled(struct zpci_dev *zdev) 104 { 105 return (zdev->fh & (1UL << 31)) ? true : false; 106 } 107 108 /* ----------------------------------------------------------------------------- 109 Prototypes 110 ----------------------------------------------------------------------------- */ 111 /* Base stuff */ 112 struct zpci_dev *zpci_alloc_device(void); 113 int zpci_create_device(struct zpci_dev *); 114 int zpci_enable_device(struct zpci_dev *); 115 void zpci_stop_device(struct zpci_dev *); 116 void zpci_free_device(struct zpci_dev *); 117 int zpci_scan_device(struct zpci_dev *); 118 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 119 int zpci_unregister_ioat(struct zpci_dev *, u8); 120 121 /* CLP */ 122 int clp_find_pci_devices(void); 123 int clp_add_pci_device(u32, u32, int); 124 int clp_enable_fh(struct zpci_dev *, u8); 125 int clp_disable_fh(struct zpci_dev *); 126 127 /* MSI */ 128 struct msi_desc *__irq_get_msi_desc(unsigned int); 129 int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32); 130 int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int); 131 void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *); 132 int zpci_msihash_init(void); 133 void zpci_msihash_exit(void); 134 135 /* Error handling and recovery */ 136 void zpci_event_error(void *); 137 void zpci_event_availability(void *); 138 139 /* Helpers */ 140 struct zpci_dev *get_zdev(struct pci_dev *); 141 struct zpci_dev *get_zdev_by_fid(u32); 142 bool zpci_fid_present(u32); 143 144 /* sysfs */ 145 int zpci_sysfs_add_device(struct device *); 146 void zpci_sysfs_remove_device(struct device *); 147 148 /* DMA */ 149 int zpci_dma_init(void); 150 void zpci_dma_exit(void); 151 152 /* Hotplug */ 153 extern struct mutex zpci_list_lock; 154 extern struct list_head zpci_list; 155 extern struct pci_hp_callback_ops hotplug_ops; 156 extern unsigned int pci_probe; 157 158 #endif 159