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__ */