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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* VMware VMCI Driver
*
* Copyright (C) 2012 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef _VMCI_QUEUE_PAIR_H_
#define _VMCI_QUEUE_PAIR_H_
#include <linux/vmw_vmci_defs.h>
#include <linux/types.h>
#include "vmci_context.h"
/* Callback needed for correctly waiting on events. */
typedef int (*vmci_event_release_cb) (void *client_data);
/* Guest device port I/O. */
struct ppn_set {
u64 num_produce_pages;
u64 num_consume_pages;
u64 *produce_ppns;
u64 *consume_ppns;
bool initialized;
};
/* VMCIqueue_pairAllocInfo */
struct vmci_qp_alloc_info {
struct vmci_handle handle;
u32 peer;
u32 flags;
u64 produce_size;
u64 consume_size;
u64 ppn_va; /* Start VA of queue pair PPNs. */
u64 num_ppns;
s32 result;
u32 version;
};
/* VMCIqueue_pairSetVAInfo */
struct vmci_qp_set_va_info {
struct vmci_handle handle;
u64 va; /* Start VA of queue pair PPNs. */
u64 num_ppns;
u32 version;
s32 result;
};
/*
* For backwards compatibility, here is a version of the
* VMCIqueue_pairPageFileInfo before host support end-points was added.
* Note that the current version of that structure requires VMX to
* pass down the VA of the mapped file. Before host support was added
* there was nothing of the sort. So, when the driver sees the ioctl
* with a parameter that is the sizeof
* VMCIqueue_pairPageFileInfo_NoHostQP then it can infer that the version
* of VMX running can't attach to host end points because it doesn't
* provide the VA of the mapped files.
*
* The Linux driver doesn't get an indication of the size of the
* structure passed down from user space. So, to fix a long standing
* but unfiled bug, the _pad field has been renamed to version.
* Existing versions of VMX always initialize the PageFileInfo
* structure so that _pad, er, version is set to 0.
*
* A version value of 1 indicates that the size of the structure has
* been increased to include two UVA's: produce_uva and consume_uva.
* These UVA's are of the mmap()'d queue contents backing files.
*
* In addition, if when VMX is sending down the
* VMCIqueue_pairPageFileInfo structure it gets an error then it will
* try again with the _NoHostQP version of the file to see if an older
* VMCI kernel module is running.
*/
/* VMCIqueue_pairPageFileInfo */
struct vmci_qp_page_file_info {
struct vmci_handle handle;
u64 produce_page_file; /* User VA. */
u64 consume_page_file; /* User VA. */
u64 produce_page_file_size; /* Size of the file name array. */
u64 consume_page_file_size; /* Size of the file name array. */
s32 result;
u32 version; /* Was _pad. */
u64 produce_va; /* User VA of the mapped file. */
u64 consume_va; /* User VA of the mapped file. */
};
/* vmci queuepair detach info */
struct vmci_qp_dtch_info {
struct vmci_handle handle;
s32 result;
u32 _pad;
};
/*
* struct vmci_qp_page_store describes how the memory of a given queue pair
* is backed. When the queue pair is between the host and a guest, the
* page store consists of references to the guest pages. On vmkernel,
* this is a list of PPNs, and on hosted, it is a user VA where the
* queue pair is mapped into the VMX address space.
*/
struct vmci_qp_page_store {
/* Reference to pages backing the queue pair. */
u64 pages;
/* Length of pageList/virtual addres range (in pages). */
u32 len;
};
/*
* This data type contains the information about a queue.
* There are two queues (hence, queue pairs) per transaction model between a
* pair of end points, A & B. One queue is used by end point A to transmit
* commands and responses to B. The other queue is used by B to transmit
* commands and responses.
*
* struct vmci_queue_kern_if is a per-OS defined Queue structure. It contains
* either a direct pointer to the linear address of the buffer contents or a
* pointer to structures which help the OS locate those data pages. See
* vmciKernelIf.c for each platform for its definition.
*/
struct vmci_queue {
struct vmci_queue_header *q_header;
struct vmci_queue_header *saved_header;
struct vmci_queue_kern_if *kernel_if;
};
/*
* Utility function that checks whether the fields of the page
* store contain valid values.
* Result:
* true if the page store is wellformed. false otherwise.
*/
static inline bool
VMCI_QP_PAGESTORE_IS_WELLFORMED(struct vmci_qp_page_store *page_store)
{
return page_store->len >= 2;
}
void vmci_qp_broker_exit(void);
int vmci_qp_broker_alloc(struct vmci_handle handle, u32 peer,
u32 flags, u32 priv_flags,
u64 produce_size, u64 consume_size,
struct vmci_qp_page_store *page_store,
struct vmci_ctx *context);
int vmci_qp_broker_set_page_store(struct vmci_handle handle,
u64 produce_uva, u64 consume_uva,
struct vmci_ctx *context);
int vmci_qp_broker_detach(struct vmci_handle handle, struct vmci_ctx *context);
void vmci_qp_guest_endpoints_exit(void);
int vmci_qp_alloc(struct vmci_handle *handle,
struct vmci_queue **produce_q, u64 produce_size,
struct vmci_queue **consume_q, u64 consume_size,
u32 peer, u32 flags, u32 priv_flags,
bool guest_endpoint, vmci_event_release_cb wakeup_cb,
void *client_data);
int vmci_qp_broker_map(struct vmci_handle handle,
struct vmci_ctx *context, u64 guest_mem);
int vmci_qp_broker_unmap(struct vmci_handle handle,
struct vmci_ctx *context, u32 gid);
#endif /* _VMCI_QUEUE_PAIR_H_ */
|
