1 /* 2 * c 2001 PPC 64 Team, IBM Corp 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 #ifndef _ASM_POWERPC_PPC_PCI_H 10 #define _ASM_POWERPC_PPC_PCI_H 11 #ifdef __KERNEL__ 12 13 #ifdef CONFIG_PCI 14 15 #include <linux/pci.h> 16 #include <asm/pci-bridge.h> 17 18 extern unsigned long isa_io_base; 19 20 extern void pci_setup_phb_io(struct pci_controller *hose, int primary); 21 extern void pci_setup_phb_io_dynamic(struct pci_controller *hose, int primary); 22 23 24 extern struct list_head hose_list; 25 26 extern void find_and_init_phbs(void); 27 28 extern struct pci_dev *isa_bridge_pcidev; /* may be NULL if no ISA bus */ 29 30 /** Bus Unit ID macros; get low and hi 32-bits of the 64-bit BUID */ 31 #define BUID_HI(buid) ((buid) >> 32) 32 #define BUID_LO(buid) ((buid) & 0xffffffff) 33 34 /* PCI device_node operations */ 35 struct device_node; 36 typedef void *(*traverse_func)(struct device_node *me, void *data); 37 void *traverse_pci_devices(struct device_node *start, traverse_func pre, 38 void *data); 39 40 extern void pci_devs_phb_init(void); 41 extern void pci_devs_phb_init_dynamic(struct pci_controller *phb); 42 extern void scan_phb(struct pci_controller *hose); 43 44 /* From rtas_pci.h */ 45 extern void init_pci_config_tokens (void); 46 extern unsigned long get_phb_buid (struct device_node *); 47 extern int rtas_setup_phb(struct pci_controller *phb); 48 49 extern unsigned long pci_probe_only; 50 51 /* ---- EEH internal-use-only related routines ---- */ 52 #ifdef CONFIG_EEH 53 54 void pci_addr_cache_insert_device(struct pci_dev *dev); 55 void pci_addr_cache_remove_device(struct pci_dev *dev); 56 void pci_addr_cache_build(void); 57 struct pci_dev *pci_get_device_by_addr(unsigned long addr); 58 59 /** 60 * eeh_slot_error_detail -- record and EEH error condition to the log 61 * @pdn: pci device node 62 * @severity: EEH_LOG_TEMP_FAILURE or EEH_LOG_PERM_FAILURE 63 * 64 * Obtains the EEH error details from the RTAS subsystem, 65 * and then logs these details with the RTAS error log system. 66 */ 67 #define EEH_LOG_TEMP_FAILURE 1 68 #define EEH_LOG_PERM_FAILURE 2 69 void eeh_slot_error_detail (struct pci_dn *pdn, int severity); 70 71 /** 72 * rtas_pci_enable - enable IO transfers for this slot 73 * @pdn: pci device node 74 * @function: either EEH_THAW_MMIO or EEH_THAW_DMA 75 * 76 * Enable I/O transfers to this slot 77 */ 78 #define EEH_THAW_MMIO 2 79 #define EEH_THAW_DMA 3 80 int rtas_pci_enable(struct pci_dn *pdn, int function); 81 82 /** 83 * rtas_set_slot_reset -- unfreeze a frozen slot 84 * @pdn: pci device node 85 * 86 * Clear the EEH-frozen condition on a slot. This routine 87 * does this by asserting the PCI #RST line for 1/8th of 88 * a second; this routine will sleep while the adapter is 89 * being reset. 90 * 91 * Returns a non-zero value if the reset failed. 92 */ 93 int rtas_set_slot_reset (struct pci_dn *); 94 int eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs); 95 96 /** 97 * eeh_restore_bars - Restore device configuration info. 98 * @pdn: pci device node 99 * 100 * A reset of a PCI device will clear out its config space. 101 * This routines will restore the config space for this 102 * device, and is children, to values previously obtained 103 * from the firmware. 104 */ 105 void eeh_restore_bars(struct pci_dn *); 106 107 /** 108 * rtas_configure_bridge -- firmware initialization of pci bridge 109 * @pdn: pci device node 110 * 111 * Ask the firmware to configure all PCI bridges devices 112 * located behind the indicated node. Required after a 113 * pci device reset. Does essentially the same hing as 114 * eeh_restore_bars, but for brdges, and lets firmware 115 * do the work. 116 */ 117 void rtas_configure_bridge(struct pci_dn *); 118 119 int rtas_write_config(struct pci_dn *, int where, int size, u32 val); 120 int rtas_read_config(struct pci_dn *, int where, int size, u32 *val); 121 122 /** 123 * eeh_mark_slot -- set mode flags for pertition endpoint 124 * @pdn: pci device node 125 * 126 * mark and clear slots: find "partition endpoint" PE and set or 127 * clear the flags for each subnode of the PE. 128 */ 129 void eeh_mark_slot (struct device_node *dn, int mode_flag); 130 void eeh_clear_slot (struct device_node *dn, int mode_flag); 131 132 /** 133 * find_device_pe -- Find the associated "Partiationable Endpoint" PE 134 * @pdn: pci device node 135 */ 136 struct device_node * find_device_pe(struct device_node *dn); 137 138 void eeh_sysfs_add_device(struct pci_dev *pdev); 139 void eeh_sysfs_remove_device(struct pci_dev *pdev); 140 141 #endif /* CONFIG_EEH */ 142 143 #else /* CONFIG_PCI */ 144 static inline void find_and_init_phbs(void) { } 145 static inline void init_pci_config_tokens(void) { } 146 #endif /* !CONFIG_PCI */ 147 148 #endif /* __KERNEL__ */ 149 #endif /* _ASM_POWERPC_PPC_PCI_H */ 150