xref: /openbmc/linux/arch/powerpc/include/asm/ppc-pci.h (revision b6dcefde)
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 
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 #endif /* CONFIG_EEH */
141 
142 #else /* CONFIG_PCI */
143 static inline void find_and_init_phbs(void) { }
144 static inline void init_pci_config_tokens(void) { }
145 #endif /* !CONFIG_PCI */
146 
147 #endif /* __KERNEL__ */
148 #endif /* _ASM_POWERPC_PPC_PCI_H */
149