129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
|
/*
|
||
|
|
* PCI Backend - Common data structures for overriding the configuration space
|
||
|
|
*
|
||
|
|
* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __XEN_PCIBACK_CONF_SPACE_H__
|
||
|
|
#define __XEN_PCIBACK_CONF_SPACE_H__
|
||
|
|
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
|
||
|
|
/* conf_field_init can return an errno in a ptr with ERR_PTR() */
|
||
|
|
typedef void *(*conf_field_init) (struct pci_dev *dev, int offset);
|
||
|
|
typedef void (*conf_field_reset) (struct pci_dev *dev, int offset, void *data);
|
||
|
|
typedef void (*conf_field_free) (struct pci_dev *dev, int offset, void *data);
|
||
|
|
|
||
|
|
typedef int (*conf_dword_write) (struct pci_dev *dev, int offset, u32 value,
|
||
|
|
void *data);
|
||
|
|
typedef int (*conf_word_write) (struct pci_dev *dev, int offset, u16 value,
|
||
|
|
void *data);
|
||
|
|
typedef int (*conf_byte_write) (struct pci_dev *dev, int offset, u8 value,
|
||
|
|
void *data);
|
||
|
|
typedef int (*conf_dword_read) (struct pci_dev *dev, int offset, u32 *value,
|
||
|
|
void *data);
|
||
|
|
typedef int (*conf_word_read) (struct pci_dev *dev, int offset, u16 *value,
|
||
|
|
void *data);
|
||
|
|
typedef int (*conf_byte_read) (struct pci_dev *dev, int offset, u8 *value,
|
||
|
|
void *data);
|
||
|
|
|
||
|
|
/* These are the fields within the configuration space which we
|
||
|
|
* are interested in intercepting reads/writes to and changing their
|
||
|
|
* values.
|
||
|
|
*/
|
||
|
|
struct config_field {
|
||
|
|
unsigned int offset;
|
||
|
|
unsigned int size;
|
||
|
|
unsigned int mask;
|
||
|
|
conf_field_init init;
|
||
|
|
conf_field_reset reset;
|
||
|
|
conf_field_free release;
|
||
|
|
void (*clean) (struct config_field *field);
|
||
|
|
union {
|
||
|
|
struct {
|
||
|
|
conf_dword_write write;
|
||
|
|
conf_dword_read read;
|
||
|
|
} dw;
|
||
|
|
struct {
|
||
|
|
conf_word_write write;
|
||
|
|
conf_word_read read;
|
||
|
|
} w;
|
||
|
|
struct {
|
||
|
|
conf_byte_write write;
|
||
|
|
conf_byte_read read;
|
||
|
|
} b;
|
||
|
|
} u;
|
||
|
|
struct list_head list;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct config_field_entry {
|
||
|
|
struct list_head list;
|
||
|
|
const struct config_field *field;
|
||
|
|
unsigned int base_offset;
|
||
|
|
void *data;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern bool xen_pcibk_permissive;
|
||
|
|
|
||
|
|
#define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset)
|
||
|
|
|
||
|
|
/* Add fields to a device - the add_fields macro expects to get a pointer to
|
||
|
|
* the first entry in an array (of which the ending is marked by size==0)
|
||
|
|
*/
|
||
|
|
int xen_pcibk_config_add_field_offset(struct pci_dev *dev,
|
||
|
|
const struct config_field *field,
|
||
|
|
unsigned int offset);
|
||
|
|
|
||
|
|
static inline int xen_pcibk_config_add_field(struct pci_dev *dev,
|
||
|
|
const struct config_field *field)
|
||
|
|
{
|
||
|
|
return xen_pcibk_config_add_field_offset(dev, field, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int xen_pcibk_config_add_fields(struct pci_dev *dev,
|
||
|
|
const struct config_field *field)
|
||
|
|
{
|
||
|
|
int i, err = 0;
|
||
|
|
for (i = 0; field[i].size != 0; i++) {
|
||
|
|
err = xen_pcibk_config_add_field(dev, &field[i]);
|
||
|
|
if (err)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int xen_pcibk_config_add_fields_offset(struct pci_dev *dev,
|
||
|
|
const struct config_field *field,
|
||
|
|
unsigned int offset)
|
||
|
|
{
|
||
|
|
int i, err = 0;
|
||
|
|
for (i = 0; field[i].size != 0; i++) {
|
||
|
|
err = xen_pcibk_config_add_field_offset(dev, &field[i], offset);
|
||
|
|
if (err)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read/Write the real configuration space */
|
||
|
|
int xen_pcibk_read_config_byte(struct pci_dev *dev, int offset, u8 *value,
|
||
|
|
void *data);
|
||
|
|
int xen_pcibk_read_config_word(struct pci_dev *dev, int offset, u16 *value,
|
||
|
|
void *data);
|
||
|
|
int xen_pcibk_read_config_dword(struct pci_dev *dev, int offset, u32 *value,
|
||
|
|
void *data);
|
||
|
|
int xen_pcibk_write_config_byte(struct pci_dev *dev, int offset, u8 value,
|
||
|
|
void *data);
|
||
|
|
int xen_pcibk_write_config_word(struct pci_dev *dev, int offset, u16 value,
|
||
|
|
void *data);
|
||
|
|
int xen_pcibk_write_config_dword(struct pci_dev *dev, int offset, u32 value,
|
||
|
|
void *data);
|
||
|
|
|
||
|
|
int xen_pcibk_config_capability_init(void);
|
||
|
|
|
||
|
|
int xen_pcibk_config_header_add_fields(struct pci_dev *dev);
|
||
|
|
int xen_pcibk_config_capability_add_fields(struct pci_dev *dev);
|
||
|
|
|
||
|
|
#endif /* __XEN_PCIBACK_CONF_SPACE_H__ */
|