2 * PCI Backend/Frontend Common Data Structures & Macros
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22 * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
24 #ifndef __XEN_PCI_COMMON_H__
25 #define __XEN_PCI_COMMON_H__
27 /* Be sure to bump this number if you change this file */
28 #define XEN_PCI_MAGIC "7"
30 /* xen_pci_sharedinfo flags */
31 #define _XEN_PCIF_active (0)
32 #define XEN_PCIF_active (1<<_XEN_PCI_active)
34 /* xen_pci_op commands */
35 #define XEN_PCI_OP_conf_read (0)
36 #define XEN_PCI_OP_conf_write (1)
37 #define XEN_PCI_OP_enable_msi (2)
38 #define XEN_PCI_OP_disable_msi (3)
39 #define XEN_PCI_OP_enable_msix (4)
40 #define XEN_PCI_OP_disable_msix (5)
42 /* xen_pci_op error numbers */
43 #define XEN_PCI_ERR_success (0)
44 #define XEN_PCI_ERR_dev_not_found (-1)
45 #define XEN_PCI_ERR_invalid_offset (-2)
46 #define XEN_PCI_ERR_access_denied (-3)
47 #define XEN_PCI_ERR_not_implemented (-4)
48 /* XEN_PCI_ERR_op_failed - backend failed to complete the operation */
49 #define XEN_PCI_ERR_op_failed (-5)
52 * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))
53 * Should not exceed 128
55 #define SH_INFO_MAX_VEC 128
57 struct xen_msix_entry {
62 /* IN: what action to perform: XEN_PCI_OP_* */
65 /* OUT: will contain an error number (if any) from errno.h */
68 /* IN: which device to touch */
69 uint32_t domain; /* PCI Domain/Segment */
73 /* IN: which configuration registers to touch */
77 /* IN/OUT: Contains the result after a READ or the value to WRITE */
79 /* IN: Contains extra infor for this operation */
81 /*IN: param for msi-x */
82 struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC];
85 struct xen_pci_sharedinfo {
86 /* flags - XEN_PCIF_* */
91 #endif /* __XEN_PCI_COMMON_H__ */
99 * indent-tabs-mode: nil