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pciif.h
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1 /*
2  * PCI Backend/Frontend Common Data Structures & Macros
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a copy
5  * of this software and associated documentation files (the "Software"), to
6  * deal in the Software without restriction, including without limitation the
7  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8  * sell copies of the Software, and to permit persons to whom the Software is
9  * furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20  * DEALINGS IN THE SOFTWARE.
21  *
22  * Author: Ryan Wilson <[email protected]>
23  */
24 #ifndef __XEN_PCI_COMMON_H__
25 #define __XEN_PCI_COMMON_H__
26 
27 /* Be sure to bump this number if you change this file */
28 #define XEN_PCI_MAGIC "7"
29 
30 /* xen_pci_sharedinfo flags */
31 #define _XEN_PCIF_active (0)
32 #define XEN_PCIF_active (1<<_XEN_PCIF_active)
33 #define _XEN_PCIB_AERHANDLER (1)
34 #define XEN_PCIB_AERHANDLER (1<<_XEN_PCIB_AERHANDLER)
35 #define _XEN_PCIB_active (2)
36 #define XEN_PCIB_active (1<<_XEN_PCIB_active)
37 
38 /* xen_pci_op commands */
39 #define XEN_PCI_OP_conf_read (0)
40 #define XEN_PCI_OP_conf_write (1)
41 #define XEN_PCI_OP_enable_msi (2)
42 #define XEN_PCI_OP_disable_msi (3)
43 #define XEN_PCI_OP_enable_msix (4)
44 #define XEN_PCI_OP_disable_msix (5)
45 #define XEN_PCI_OP_aer_detected (6)
46 #define XEN_PCI_OP_aer_resume (7)
47 #define XEN_PCI_OP_aer_mmio (8)
48 #define XEN_PCI_OP_aer_slotreset (9)
49 
50 /* xen_pci_op error numbers */
51 #define XEN_PCI_ERR_success (0)
52 #define XEN_PCI_ERR_dev_not_found (-1)
53 #define XEN_PCI_ERR_invalid_offset (-2)
54 #define XEN_PCI_ERR_access_denied (-3)
55 #define XEN_PCI_ERR_not_implemented (-4)
56 /* XEN_PCI_ERR_op_failed - backend failed to complete the operation */
57 #define XEN_PCI_ERR_op_failed (-5)
58 
59 /*
60  * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))
61  * Should not exceed 128
62  */
63 #define SH_INFO_MAX_VEC 128
64 
68 };
69 struct xen_pci_op {
70  /* IN: what action to perform: XEN_PCI_OP_* */
72 
73  /* OUT: will contain an error number (if any) from errno.h */
75 
76  /* IN: which device to touch */
77  uint32_t domain; /* PCI Domain/Segment */
80 
81  /* IN: which configuration registers to touch */
84 
85  /* IN/OUT: Contains the result after a READ or the value to WRITE */
87  /* IN: Contains extra infor for this operation */
89  /*IN: param for msi-x */
91 };
92 
93 /*used for pcie aer handling*/
95  /* IN: what action to perform: XEN_PCI_OP_* */
97  /*IN/OUT: return aer_op result or carry error_detected state as input*/
99 
100  /* IN: which device to touch */
101  uint32_t domain; /* PCI Domain/Segment*/
104 };
106  /* flags - XEN_PCIF_* */
108  struct xen_pci_op op;
110 };
111 
112 #endif /* __XEN_PCI_COMMON_H__ */