Root/
1 | /****************************************************************************** |
2 | * grant_table.h |
3 | * |
4 | * Two sets of functionality: |
5 | * 1. Granting foreign access to our memory reservation. |
6 | * 2. Accessing others' memory reservations via grant references. |
7 | * (i.e., mechanisms for both sender and recipient of grant references) |
8 | * |
9 | * Copyright (c) 2004-2005, K A Fraser |
10 | * Copyright (c) 2005, Christopher Clark |
11 | * |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public License version 2 |
14 | * as published by the Free Software Foundation; or, when distributed |
15 | * separately from the Linux kernel or incorporated into other |
16 | * software packages, subject to the following license: |
17 | * |
18 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
19 | * of this source file (the "Software"), to deal in the Software without |
20 | * restriction, including without limitation the rights to use, copy, modify, |
21 | * merge, publish, distribute, sublicense, and/or sell copies of the Software, |
22 | * and to permit persons to whom the Software is furnished to do so, subject to |
23 | * the following conditions: |
24 | * |
25 | * The above copyright notice and this permission notice shall be included in |
26 | * all copies or substantial portions of the Software. |
27 | * |
28 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
29 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
30 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
31 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
32 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
33 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
34 | * IN THE SOFTWARE. |
35 | */ |
36 | |
37 | #ifndef __ASM_GNTTAB_H__ |
38 | #define __ASM_GNTTAB_H__ |
39 | |
40 | #include <asm/xen/hypervisor.h> |
41 | #include <xen/interface/grant_table.h> |
42 | #include <asm/xen/grant_table.h> |
43 | |
44 | /* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */ |
45 | #define NR_GRANT_FRAMES 4 |
46 | |
47 | struct gnttab_free_callback { |
48 | struct gnttab_free_callback *next; |
49 | void (*fn)(void *); |
50 | void *arg; |
51 | u16 count; |
52 | }; |
53 | |
54 | int gnttab_suspend(void); |
55 | int gnttab_resume(void); |
56 | |
57 | int gnttab_grant_foreign_access(domid_t domid, unsigned long frame, |
58 | int readonly); |
59 | |
60 | /* |
61 | * End access through the given grant reference, iff the grant entry is no |
62 | * longer in use. Return 1 if the grant entry was freed, 0 if it is still in |
63 | * use. |
64 | */ |
65 | int gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly); |
66 | |
67 | /* |
68 | * Eventually end access through the given grant reference, and once that |
69 | * access has been ended, free the given page too. Access will be ended |
70 | * immediately iff the grant entry is not in use, otherwise it will happen |
71 | * some time later. page may be 0, in which case no freeing will occur. |
72 | */ |
73 | void gnttab_end_foreign_access(grant_ref_t ref, int readonly, |
74 | unsigned long page); |
75 | |
76 | int gnttab_grant_foreign_transfer(domid_t domid, unsigned long pfn); |
77 | |
78 | unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref); |
79 | unsigned long gnttab_end_foreign_transfer(grant_ref_t ref); |
80 | |
81 | int gnttab_query_foreign_access(grant_ref_t ref); |
82 | |
83 | /* |
84 | * operations on reserved batches of grant references |
85 | */ |
86 | int gnttab_alloc_grant_references(u16 count, grant_ref_t *pprivate_head); |
87 | |
88 | void gnttab_free_grant_reference(grant_ref_t ref); |
89 | |
90 | void gnttab_free_grant_references(grant_ref_t head); |
91 | |
92 | int gnttab_empty_grant_references(const grant_ref_t *pprivate_head); |
93 | |
94 | int gnttab_claim_grant_reference(grant_ref_t *pprivate_head); |
95 | |
96 | void gnttab_release_grant_reference(grant_ref_t *private_head, |
97 | grant_ref_t release); |
98 | |
99 | void gnttab_request_free_callback(struct gnttab_free_callback *callback, |
100 | void (*fn)(void *), void *arg, u16 count); |
101 | void gnttab_cancel_free_callback(struct gnttab_free_callback *callback); |
102 | |
103 | void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid, |
104 | unsigned long frame, int readonly); |
105 | |
106 | void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid, |
107 | unsigned long pfn); |
108 | |
109 | int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes, |
110 | unsigned long max_nr_gframes, |
111 | struct grant_entry **__shared); |
112 | void arch_gnttab_unmap_shared(struct grant_entry *shared, |
113 | unsigned long nr_gframes); |
114 | |
115 | #define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr)) |
116 | |
117 | #endif /* __ASM_GNTTAB_H__ */ |
118 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9