1 /***********************license start************************************
2 * Copyright (c) 2003-2017 Cavium, Inc.
3 * All rights reserved.
4 *
5 * License: one of 'Cavium License' or 'GNU General Public License Version 2'
6 *
7 * This file is provided under the terms of the Cavium License (see below)
8 * or under the terms of GNU General Public License, Version 2, as
9 * published by the Free Software Foundation. When using or redistributing
10 * this file, you may do so under either license.
11 *
12 * Cavium License: Redistribution and use in source and binary forms, with
13 * or without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * * Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * * Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * * Neither the name of Cavium Inc. nor the names of its contributors may be
25 * used to endorse or promote products derived from this software without
26 * specific prior written permission.
27 *
28 * This Software, including technical data, may be subject to U.S. export
29 * control laws, including the U.S. Export Administration Act and its
30 * associated regulations, and may be subject to export or import
31 * regulations in other countries.
32 *
33 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
34 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS
35 * OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
36 * RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
37 * REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
38 * DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY)
39 * WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A
40 * PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET
41 * ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE
42 * ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES
43 * WITH YOU.
44 ***********************license end**************************************/
45
46 #include <linux/types.h>
47 #include <linux/vmalloc.h>
48
49 #include "common.h"
50
51 /**
52 * zip_cmd_qbuf_alloc - Allocates a cmd buffer for ZIP Instruction Queue
53 * @zip: Pointer to zip device structure
54 * @q: Queue number to allocate bufffer to
55 * Return: 0 if successful, -ENOMEM otherwise
56 */
57 int zip_cmd_qbuf_alloc(struct zip_device *zip, int q)
58 {
59 zip->iq[q].sw_head = (u64 *)__get_free_pages((GFP_KERNEL | GFP_DMA),
60 get_order(ZIP_CMD_QBUF_SIZE));
61
62 if (!zip->iq[q].sw_head)
63 return -ENOMEM;
64
65 memset(zip->iq[q].sw_head, 0, ZIP_CMD_QBUF_SIZE);
66
67 zip_dbg("cmd_qbuf_alloc[%d] Success : %p\n", q, zip->iq[q].sw_head);
68 return 0;
69 }
70
71 /**
72 * zip_cmd_qbuf_free - Frees the cmd Queue buffer
73 * @zip: Pointer to zip device structure
74 * @q: Queue number to free buffer of
75 */
76 void zip_cmd_qbuf_free(struct zip_device *zip, int q)
77 {
78 zip_dbg("Freeing cmd_qbuf 0x%lx\n", zip->iq[q].sw_tail);
79
80 free_pages((u64)zip->iq[q].sw_tail, get_order(ZIP_CMD_QBUF_SIZE));
81 }
82
83 /**
84 * zip_data_buf_alloc - Allocates memory for a data bufffer
85 * @size: Size of the buffer to allocate
86 * Returns: Pointer to the buffer allocated
87 */
88 u8 *zip_data_buf_alloc(u64 size)
89 {
90 u8 *ptr;
91
92 ptr = (u8 *)__get_free_pages((GFP_KERNEL | GFP_DMA),
93 get_order(size));
94
95 if (!ptr)
96 return NULL;
97
98 memset(ptr, 0, size);
99
100 zip_dbg("Data buffer allocation success\n");
101 return ptr;
102 }
103
104 /**
105 * zip_data_buf_free - Frees the memory of a data buffer
106 * @ptr: Pointer to the buffer
107 * @size: Buffer size
108 */
109 void zip_data_buf_free(u8 *ptr, u64 size)
110 {
111 zip_dbg("Freeing data buffer 0x%lx\n", ptr);
112
113 free_pages((u64)ptr, get_order(size));
114 }