arch/powerpc/include/asm/ppc-pci.h

   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) upper_32_bits(buid)
  32 #define BUID_LO(buid) lower_32_bits(buid)
  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
  43 /* From rtas_pci.h */
  44 extern void init_pci_config_tokens (void);
  45 extern unsigned long get_phb_buid (struct device_node *);
  46 extern int rtas_setup_phb(struct pci_controller *phb);
  47
  48 extern unsigned long pci_probe_only;
  49
  50 /* ---- EEH internal-use-only related routines ---- */
  51 #ifdef CONFIG_EEH
  52
  53 void pci_addr_cache_insert_device(struct pci_dev *dev);
  54 void pci_addr_cache_remove_device(struct pci_dev *dev);
  55 void pci_addr_cache_build(void);
  56 struct pci_dev *pci_get_device_by_addr(unsigned long addr);
  57
  58 /**
  59  * eeh_slot_error_detail -- record and EEH error condition to the log
  60  * @pdn:      pci device node
  61  * @severity: EEH_LOG_TEMP_FAILURE or EEH_LOG_PERM_FAILURE
  62  *
  63  * Obtains the EEH error details from the RTAS subsystem,
  64  * and then logs these details with the RTAS error log system.
  65  */
  66 #define EEH_LOG_TEMP_FAILURE 1
  67 #define EEH_LOG_PERM_FAILURE 2
  68 void eeh_slot_error_detail (struct pci_dn *pdn, int severity);
  69
  70 /**
  71  * rtas_pci_enable - enable IO transfers for this slot
  72  * @pdn:       pci device node
  73  * @function:  either EEH_THAW_MMIO or EEH_THAW_DMA
  74  *
  75  * Enable I/O transfers to this slot
  76  */
  77 #define EEH_THAW_MMIO 2
  78 #define EEH_THAW_DMA  3
  79 int rtas_pci_enable(struct pci_dn *pdn, int function);
  80
  81 /**
  82  * rtas_set_slot_reset -- unfreeze a frozen slot
  83  * @pdn:       pci device node
  84  *
  85  * Clear the EEH-frozen condition on a slot.  This routine
  86  * does this by asserting the PCI #RST line for 1/8th of
  87  * a second; this routine will sleep while the adapter is
  88  * being reset.
  89  *
  90  * Returns a non-zero value if the reset failed.
  91  */
  92 int rtas_set_slot_reset (struct pci_dn *);
  93 int eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs);
  94
  95 /**
  96  * eeh_restore_bars - Restore device configuration info.
  97  * @pdn:       pci device node
  98  *
  99  * A reset of a PCI device will clear out its config space.
 100  * This routines will restore the config space for this
 101  * device, and is children, to values previously obtained
 102  * from the firmware.
 103  */
 104 void eeh_restore_bars(struct pci_dn *);
 105
 106 /**
 107  * rtas_configure_bridge -- firmware initialization of pci bridge
 108  * @pdn:       pci device node
 109  *
 110  * Ask the firmware to configure all PCI bridges devices
 111  * located behind the indicated node. Required after a
 112  * pci device reset. Does essentially the same hing as
 113  * eeh_restore_bars, but for brdges, and lets firmware
 114  * do the work.
 115  */
 116 void rtas_configure_bridge(struct pci_dn *);
 117
 118 int rtas_write_config(struct pci_dn *, int where, int size, u32 val);
 119 int rtas_read_config(struct pci_dn *, int where, int size, u32 *val);
 120
 121 /**
 122  * eeh_mark_slot -- set mode flags for pertition endpoint
 123  * @pdn:       pci device node
 124  *
 125  * mark and clear slots: find "partition endpoint" PE and set or
 126  * clear the flags for each subnode of the PE.
 127  */
 128 void eeh_mark_slot (struct device_node *dn, int mode_flag);
 129 void eeh_clear_slot (struct device_node *dn, int mode_flag);
 130
 131 /**
 132  * find_device_pe -- Find the associated "Partiationable Endpoint" PE
 133  * @pdn:       pci device node
 134  */
 135 struct device_node * find_device_pe(struct device_node *dn);
 136
 137 void eeh_sysfs_add_device(struct pci_dev *pdev);
 138 void eeh_sysfs_remove_device(struct pci_dev *pdev);
 139
 140 static inline const char *eeh_pci_name(struct pci_dev *pdev)
 141 {
 142         return pdev ? pci_name(pdev) : "<null>";
 143 }
 144
 145 static inline const char *eeh_driver_name(struct pci_dev *pdev)
 146 {
 147         return (pdev && pdev->driver) ? pdev->driver->name : "<null>";
 148 }
 149
 150 #endif /* CONFIG_EEH */
 151
 152 #else /* CONFIG_PCI */
 153 static inline void find_and_init_phbs(void) { }
 154 static inline void init_pci_config_tokens(void) { }
 155 #endif /* !CONFIG_PCI */
 156
 157 #endif /* __KERNEL__ */
 158 #endif /* _ASM_POWERPC_PPC_PCI_H */