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 } 115