Commit | Line | Data |
---|---|---|
800f879a AT |
1 | /* |
2 | * Copyright 2010-2017 Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License, version 2, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * Disclaimer: The codes contained in these modules may be specific to | |
14 | * the Intel Software Development Platform codenamed Knights Ferry, | |
15 | * and the Intel product codenamed Knights Corner, and are not backward | |
16 | * compatible with other Intel products. Additionally, Intel will NOT | |
17 | * support the codes or instruction set in future products. | |
18 | * | |
19 | * Intel offers no warranty of any kind regarding the code. This code is | |
20 | * licensed on an "AS IS" basis and Intel is not obligated to provide | |
21 | * any support, assistance, installation, training, or other services | |
22 | * of any kind. Intel is also not obligated to provide any updates, | |
23 | * enhancements or extensions. Intel specifically disclaims any warranty | |
24 | * of merchantability, non-infringement, fitness for any particular | |
25 | * purpose, and any other warranty. | |
26 | * | |
27 | * Further, Intel disclaims all liability of any kind, including but | |
28 | * not limited to liability for infringement of any proprietary rights, | |
29 | * relating to the use of the code, even if Intel is notified of the | |
30 | * possibility of such liability. Except as expressly stated in an Intel | |
31 | * license agreement provided with this code and agreed upon with Intel, | |
32 | * no license, express or implied, by estoppel or otherwise, to any | |
33 | * intellectual property rights is granted herein. | |
34 | */ | |
35 | ||
36 | /* generate a virtual address for a given size */ | |
37 | ||
38 | #ifndef MICSCIF_VA_GEN_H | |
39 | #define MICSCIF_VA_GEN_H | |
40 | ||
41 | #include "micscif_va_node.h" | |
42 | ||
43 | /* | |
44 | * To avoid collisions with user applications trying to use | |
45 | * MAP_FIXED with scif_register(), the following window address space | |
46 | * allocation scheme is used. | |
47 | * | |
48 | * 1) (0) - (2 ^ 62 - 1)) | |
49 | * Window Address Space that can be claimed using MAP_FIXED. | |
50 | * 2) (2 ^ 62) - (2 ^ 63) - 1) | |
51 | * Window address space used for allocations by the SCIF driver | |
52 | * when MAP_FIXED is not passed. | |
53 | */ | |
54 | #define VA_GEN_MIN 0x4000000000000000 | |
55 | #define VA_GEN_RANGE 0x3f00000000000000 | |
56 | ||
57 | #define INVALID_VA_GEN_ADDRESS 0xff00000000000000 | |
58 | #define INVALID_VA_PAGE_INDEX 0xff00000000000 | |
59 | ||
60 | struct va_gen_addr { | |
61 | struct va_node_allocator allocator; | |
62 | uint32_t hole_list; | |
63 | uint32_t claims_list; | |
64 | uint64_t base; | |
65 | }; | |
66 | ||
67 | /* | |
68 | * return a base for the range | |
69 | * caller trusted to keep track of both base and range | |
70 | */ | |
71 | uint64_t va_gen_alloc(struct va_gen_addr *addr, | |
72 | uint64_t num_bytes, uint32_t align_bytes); | |
73 | ||
74 | /* Claim ownership of memory region. Fails if already occupied */ | |
75 | uint64_t va_gen_claim(struct va_gen_addr *addr, | |
76 | uint64_t address, uint64_t num_bytes); | |
77 | ||
78 | /* release ownership of a base/range */ | |
79 | void va_gen_free(struct va_gen_addr *addr, | |
80 | uint64_t address, uint64_t num_bytes); | |
81 | ||
82 | int va_gen_init(struct va_gen_addr *addr, uint64_t base, uint64_t range); | |
83 | ||
84 | void va_gen_destroy(struct va_gen_addr *addr); | |
85 | ||
86 | #endif |