1 | /* SPDX-License-Identifier: MIT */ |
2 | /* |
3 | * PCI Backend/Frontend Common Data Structures & Macros |
4 | * |
5 | * Author: Ryan Wilson <hap9@epoch.ncsc.mil> |
6 | */ |
7 | #ifndef __XEN_PCI_COMMON_H__ |
8 | #define __XEN_PCI_COMMON_H__ |
9 | |
10 | /* Be sure to bump this number if you change this file */ |
11 | #define XEN_PCI_MAGIC "7" |
12 | |
13 | /* xen_pci_sharedinfo flags */ |
14 | #define _XEN_PCIF_active (0) |
15 | #define XEN_PCIF_active (1<<_XEN_PCIF_active) |
16 | #define _XEN_PCIB_AERHANDLER (1) |
17 | #define XEN_PCIB_AERHANDLER (1<<_XEN_PCIB_AERHANDLER) |
18 | #define _XEN_PCIB_active (2) |
19 | #define XEN_PCIB_active (1<<_XEN_PCIB_active) |
20 | |
21 | /* xen_pci_op commands */ |
22 | #define XEN_PCI_OP_conf_read (0) |
23 | #define XEN_PCI_OP_conf_write (1) |
24 | #define XEN_PCI_OP_enable_msi (2) |
25 | #define XEN_PCI_OP_disable_msi (3) |
26 | #define XEN_PCI_OP_enable_msix (4) |
27 | #define XEN_PCI_OP_disable_msix (5) |
28 | #define XEN_PCI_OP_aer_detected (6) |
29 | #define XEN_PCI_OP_aer_resume (7) |
30 | #define XEN_PCI_OP_aer_mmio (8) |
31 | #define XEN_PCI_OP_aer_slotreset (9) |
32 | |
33 | /* xen_pci_op error numbers */ |
34 | #define XEN_PCI_ERR_success (0) |
35 | #define XEN_PCI_ERR_dev_not_found (-1) |
36 | #define XEN_PCI_ERR_invalid_offset (-2) |
37 | #define XEN_PCI_ERR_access_denied (-3) |
38 | #define XEN_PCI_ERR_not_implemented (-4) |
39 | /* XEN_PCI_ERR_op_failed - backend failed to complete the operation */ |
40 | #define XEN_PCI_ERR_op_failed (-5) |
41 | |
42 | /* |
43 | * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry)) |
44 | * Should not exceed 128 |
45 | */ |
46 | #define SH_INFO_MAX_VEC 128 |
47 | |
48 | struct xen_msix_entry { |
49 | uint16_t vector; |
50 | uint16_t entry; |
51 | }; |
52 | struct xen_pci_op { |
53 | /* IN: what action to perform: XEN_PCI_OP_* */ |
54 | uint32_t cmd; |
55 | |
56 | /* OUT: will contain an error number (if any) from errno.h */ |
57 | int32_t err; |
58 | |
59 | /* IN: which device to touch */ |
60 | uint32_t domain; /* PCI Domain/Segment */ |
61 | uint32_t bus; |
62 | uint32_t devfn; |
63 | |
64 | /* IN: which configuration registers to touch */ |
65 | int32_t offset; |
66 | int32_t size; |
67 | |
68 | /* IN/OUT: Contains the result after a READ or the value to WRITE */ |
69 | uint32_t value; |
70 | /* IN: Contains extra infor for this operation */ |
71 | uint32_t info; |
72 | /*IN: param for msi-x */ |
73 | struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC]; |
74 | }; |
75 | |
76 | /*used for pcie aer handling*/ |
77 | struct xen_pcie_aer_op { |
78 | /* IN: what action to perform: XEN_PCI_OP_* */ |
79 | uint32_t cmd; |
80 | /*IN/OUT: return aer_op result or carry error_detected state as input*/ |
81 | int32_t err; |
82 | |
83 | /* IN: which device to touch */ |
84 | uint32_t domain; /* PCI Domain/Segment*/ |
85 | uint32_t bus; |
86 | uint32_t devfn; |
87 | }; |
88 | struct xen_pci_sharedinfo { |
89 | /* flags - XEN_PCIF_* */ |
90 | uint32_t flags; |
91 | struct xen_pci_op op; |
92 | struct xen_pcie_aer_op aer_op; |
93 | }; |
94 | |
95 | #endif /* __XEN_PCI_COMMON_H__ */ |
96 | |