cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

zip_mem.c (3896B)

      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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     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"
     34 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS
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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}