2 * PCI Backend - Common data structures for overriding the configuration space
4 * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
7 #ifndef __XEN_PCIBACK_CONF_SPACE_H__
8 #define __XEN_PCIBACK_CONF_SPACE_H__
10 #include <linux/list.h>
11 #include <linux/err.h>
13 /* conf_field_init can return an errno in a ptr with ERR_PTR() */
14 typedef void *(*conf_field_init
) (struct pci_dev
*dev
, int offset
);
15 typedef void (*conf_field_reset
) (struct pci_dev
*dev
, int offset
, void *data
);
16 typedef void (*conf_field_free
) (struct pci_dev
*dev
, int offset
, void *data
);
18 typedef int (*conf_dword_write
) (struct pci_dev
*dev
, int offset
, u32 value
,
20 typedef int (*conf_word_write
) (struct pci_dev
*dev
, int offset
, u16 value
,
22 typedef int (*conf_byte_write
) (struct pci_dev
*dev
, int offset
, u8 value
,
24 typedef int (*conf_dword_read
) (struct pci_dev
*dev
, int offset
, u32
*value
,
26 typedef int (*conf_word_read
) (struct pci_dev
*dev
, int offset
, u16
*value
,
28 typedef int (*conf_byte_read
) (struct pci_dev
*dev
, int offset
, u8
*value
,
31 /* These are the fields within the configuration space which we
32 * are interested in intercepting reads/writes to and changing their
40 conf_field_reset reset
;
41 conf_field_free release
;
42 void (*clean
) (struct config_field
*field
);
45 conf_dword_write write
;
49 conf_word_write write
;
53 conf_byte_write write
;
57 struct list_head list
;
60 struct config_field_entry
{
61 struct list_head list
;
62 const struct config_field
*field
;
63 unsigned int base_offset
;
67 #define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset)
69 /* Add fields to a device - the add_fields macro expects to get a pointer to
70 * the first entry in an array (of which the ending is marked by size==0)
72 int xen_pcibk_config_add_field_offset(struct pci_dev
*dev
,
73 const struct config_field
*field
,
76 static inline int xen_pcibk_config_add_field(struct pci_dev
*dev
,
77 const struct config_field
*field
)
79 return xen_pcibk_config_add_field_offset(dev
, field
, 0);
82 static inline int xen_pcibk_config_add_fields(struct pci_dev
*dev
,
83 const struct config_field
*field
)
86 for (i
= 0; field
[i
].size
!= 0; i
++) {
87 err
= xen_pcibk_config_add_field(dev
, &field
[i
]);
94 static inline int xen_pcibk_config_add_fields_offset(struct pci_dev
*dev
,
95 const struct config_field
*field
,
99 for (i
= 0; field
[i
].size
!= 0; i
++) {
100 err
= xen_pcibk_config_add_field_offset(dev
, &field
[i
], offset
);
107 /* Read/Write the real configuration space */
108 int xen_pcibk_read_config_byte(struct pci_dev
*dev
, int offset
, u8
*value
,
110 int xen_pcibk_read_config_word(struct pci_dev
*dev
, int offset
, u16
*value
,
112 int xen_pcibk_read_config_dword(struct pci_dev
*dev
, int offset
, u32
*value
,
114 int xen_pcibk_write_config_byte(struct pci_dev
*dev
, int offset
, u8 value
,
116 int xen_pcibk_write_config_word(struct pci_dev
*dev
, int offset
, u16 value
,
118 int xen_pcibk_write_config_dword(struct pci_dev
*dev
, int offset
, u32 value
,
121 int xen_pcibk_config_capability_init(void);
123 int xen_pcibk_config_header_add_fields(struct pci_dev
*dev
);
124 int xen_pcibk_config_capability_add_fields(struct pci_dev
*dev
);
126 #endif /* __XEN_PCIBACK_CONF_SPACE_H__ */
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