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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | /* * 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 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__ */ |