| /* |
| * 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; |
| }; |
| |
| #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 pciback_config_add_field_offset(struct pci_dev *dev, |
| const struct config_field *field, |
| unsigned int offset); |
| |
| static inline int pciback_config_add_field(struct pci_dev *dev, |
| const struct config_field *field) |
| { |
| return pciback_config_add_field_offset(dev, field, 0); |
| } |
| |
| static inline int pciback_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 = pciback_config_add_field(dev, &field[i]); |
| if (err) |
| break; |
| } |
| return err; |
| } |
| |
| static inline int pciback_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 = pciback_config_add_field_offset(dev, &field[i], offset); |
| if (err) |
| break; |
| } |
| return err; |
| } |
| |
| /* Read/Write the real configuration space */ |
| int pciback_read_config_byte(struct pci_dev *dev, int offset, u8 *value, |
| void *data); |
| int pciback_read_config_word(struct pci_dev *dev, int offset, u16 *value, |
| void *data); |
| int pciback_read_config_dword(struct pci_dev *dev, int offset, u32 *value, |
| void *data); |
| int pciback_write_config_byte(struct pci_dev *dev, int offset, u8 value, |
| void *data); |
| int pciback_write_config_word(struct pci_dev *dev, int offset, u16 value, |
| void *data); |
| int pciback_write_config_dword(struct pci_dev *dev, int offset, u32 value, |
| void *data); |
| |
| int pciback_config_capability_init(void); |
| |
| int pciback_config_header_add_fields(struct pci_dev *dev); |
| int pciback_config_capability_add_fields(struct pci_dev *dev); |
| |
| #endif /* __XEN_PCIBACK_CONF_SPACE_H__ */ |