| Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * PCI Backend - Common data structures for overriding the configuration space |
| 3 | * |
| 4 | * Author: Ryan Wilson <hap9@epoch.ncsc.mil> |
| 5 | */ |
| 6 | |
| 7 | #ifndef __XEN_PCIBACK_CONF_SPACE_H__ |
| 8 | #define __XEN_PCIBACK_CONF_SPACE_H__ |
| 9 | |
| 10 | #include <linux/list.h> |
| 11 | #include <linux/err.h> |
| 12 | |
| 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); |
| 17 | |
| 18 | typedef int (*conf_dword_write) (struct pci_dev *dev, int offset, u32 value, |
| 19 | void *data); |
| 20 | typedef int (*conf_word_write) (struct pci_dev *dev, int offset, u16 value, |
| 21 | void *data); |
| 22 | typedef int (*conf_byte_write) (struct pci_dev *dev, int offset, u8 value, |
| 23 | void *data); |
| 24 | typedef int (*conf_dword_read) (struct pci_dev *dev, int offset, u32 *value, |
| 25 | void *data); |
| 26 | typedef int (*conf_word_read) (struct pci_dev *dev, int offset, u16 *value, |
| 27 | void *data); |
| 28 | typedef int (*conf_byte_read) (struct pci_dev *dev, int offset, u8 *value, |
| 29 | void *data); |
| 30 | |
| 31 | /* These are the fields within the configuration space which we |
| 32 | * are interested in intercepting reads/writes to and changing their |
| 33 | * values. |
| 34 | */ |
| 35 | struct config_field { |
| 36 | unsigned int offset; |
| 37 | unsigned int size; |
| 38 | unsigned int mask; |
| 39 | conf_field_init init; |
| 40 | conf_field_reset reset; |
| 41 | conf_field_free release; |
| 42 | void (*clean) (struct config_field *field); |
| 43 | union { |
| 44 | struct { |
| 45 | conf_dword_write write; |
| 46 | conf_dword_read read; |
| 47 | } dw; |
| 48 | struct { |
| 49 | conf_word_write write; |
| 50 | conf_word_read read; |
| 51 | } w; |
| 52 | struct { |
| 53 | conf_byte_write write; |
| 54 | conf_byte_read read; |
| 55 | } b; |
| 56 | } u; |
| 57 | struct list_head list; |
| 58 | }; |
| 59 | |
| 60 | struct config_field_entry { |
| 61 | struct list_head list; |
| 62 | const struct config_field *field; |
| 63 | unsigned int base_offset; |
| 64 | void *data; |
| 65 | }; |
| 66 | |
| 67 | #define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset) |
| 68 | |
| 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) |
| 71 | */ |
| 72 | int pciback_config_add_field_offset(struct pci_dev *dev, |
| 73 | const struct config_field *field, |
| 74 | unsigned int offset); |
| 75 | |
| 76 | static inline int pciback_config_add_field(struct pci_dev *dev, |
| 77 | const struct config_field *field) |
| 78 | { |
| 79 | return pciback_config_add_field_offset(dev, field, 0); |
| 80 | } |
| 81 | |
| 82 | static inline int pciback_config_add_fields(struct pci_dev *dev, |
| 83 | const struct config_field *field) |
| 84 | { |
| 85 | int i, err = 0; |
| 86 | for (i = 0; field[i].size != 0; i++) { |
| 87 | err = pciback_config_add_field(dev, &field[i]); |
| 88 | if (err) |
| 89 | break; |
| 90 | } |
| 91 | return err; |
| 92 | } |
| 93 | |
| 94 | static inline int pciback_config_add_fields_offset(struct pci_dev *dev, |
| 95 | const struct config_field *field, |
| 96 | unsigned int offset) |
| 97 | { |
| 98 | int i, err = 0; |
| 99 | for (i = 0; field[i].size != 0; i++) { |
| 100 | err = pciback_config_add_field_offset(dev, &field[i], offset); |
| 101 | if (err) |
| 102 | break; |
| 103 | } |
| 104 | return err; |
| 105 | } |
| 106 | |
| 107 | /* Read/Write the real configuration space */ |
| 108 | int pciback_read_config_byte(struct pci_dev *dev, int offset, u8 *value, |
| 109 | void *data); |
| 110 | int pciback_read_config_word(struct pci_dev *dev, int offset, u16 *value, |
| 111 | void *data); |
| 112 | int pciback_read_config_dword(struct pci_dev *dev, int offset, u32 *value, |
| 113 | void *data); |
| 114 | int pciback_write_config_byte(struct pci_dev *dev, int offset, u8 value, |
| 115 | void *data); |
| 116 | int pciback_write_config_word(struct pci_dev *dev, int offset, u16 value, |
| 117 | void *data); |
| 118 | int pciback_write_config_dword(struct pci_dev *dev, int offset, u32 value, |
| 119 | void *data); |
| 120 | |
| 121 | int pciback_config_capability_init(void); |
| 122 | |
| 123 | int pciback_config_header_add_fields(struct pci_dev *dev); |
| 124 | int pciback_config_capability_add_fields(struct pci_dev *dev); |
| 125 | |
| 126 | #endif /* __XEN_PCIBACK_CONF_SPACE_H__ */ |