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.
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12 * Cavium License: Redistribution and use in source and binary forms, with
13 * or without modification, are permitted provided that the following
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19 * * Redistributions in binary form must reproduce the above
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22 * with the distribution.
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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 */
57int zip_cmd_qbuf_alloc(struct zip_device *zip, int q)
58{
59 zip->iq[q].sw_head = (u64 *)__get_free_pages(gfp_mask: (GFP_KERNEL | GFP_DMA),
60 order: 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 */
76void 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(addr: (u64)zip->iq[q].sw_tail, order: 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 */
88u8 *zip_data_buf_alloc(u64 size)
89{
90 u8 *ptr;
91
92 ptr = (u8 *)__get_free_pages(gfp_mask: (GFP_KERNEL | GFP_DMA),
93 order: 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 */
109void zip_data_buf_free(u8 *ptr, u64 size)
110{
111 zip_dbg("Freeing data buffer 0x%lx\n", ptr);
112
113 free_pages(addr: (u64)ptr, order: get_order(size));
114}
115

source code of linux/drivers/crypto/cavium/zip/zip_mem.c