LXR linux/drivers/crypto/cavium/zip/zip

   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
  14 * conditions are met:
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  22 *    with the distribution.
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  28 * This Software, including technical data, may be subject to U.S. export
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  33 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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  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_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 */
  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((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 */
  88u8 *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 */
 109void 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}
 115