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 static inline bool zdev_enabled(struct zpci_dev *zdev) 99 { 100 return (zdev->fh & (1UL << 31)) ? true : false; 101 } 102 103 /* ----------------------------------------------------------------------------- 104 Prototypes 105 ----------------------------------------------------------------------------- */ 106 /* Base stuff */ 107 struct zpci_dev *zpci_alloc_device(void); 108 int zpci_create_device(struct zpci_dev *); 109 int zpci_enable_device(struct zpci_dev *); 110 void zpci_stop_device(struct zpci_dev *); 111 void zpci_free_device(struct zpci_dev *); 112 int zpci_scan_device(struct zpci_dev *); 113 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 114 int zpci_unregister_ioat(struct zpci_dev *, u8); 115 116 /* CLP */ 117 int clp_find_pci_devices(void); 118 int clp_add_pci_device(u32, u32, int); 119 int clp_enable_fh(struct zpci_dev *, u8); 120 int clp_disable_fh(struct zpci_dev *); 121 122 /* MSI */ 123 struct msi_desc *__irq_get_msi_desc(unsigned int); 124 int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32); 125 int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int); 126 void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *); 127 int zpci_msihash_init(void); 128 void zpci_msihash_exit(void); 129 130 /* Error handling and recovery */ 131 void zpci_event_error(void *); 132 void zpci_event_availability(void *); 133 134 /* Helpers */ 135 struct zpci_dev *get_zdev(struct pci_dev *); 136 struct zpci_dev *get_zdev_by_fid(u32); 137 bool zpci_fid_present(u32); 138 139 /* DMA */ 140 int zpci_dma_init(void); 141 void zpci_dma_exit(void); 142 143 #endif 144