1 /** 2 * AMCC SoC PPC4xx Crypto Driver 3 * 4 * Copyright (c) 2008 Applied Micro Circuits Corporation. 5 * All rights reserved. James Hsiao <jhsiao@amcc.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * @file crypto4xx_sa.c 18 * 19 * This file implements the security context 20 * associate format. 21 */ 22 #include <linux/kernel.h> 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <linux/mod_devicetable.h> 26 #include <linux/interrupt.h> 27 #include <linux/spinlock_types.h> 28 #include <linux/highmem.h> 29 #include <linux/scatterlist.h> 30 #include <linux/crypto.h> 31 #include <crypto/algapi.h> 32 #include <crypto/des.h> 33 #include "crypto4xx_reg_def.h" 34 #include "crypto4xx_sa.h" 35 #include "crypto4xx_core.h" 36 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx * ctx)37u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx) 38 { 39 u32 offset; 40 union dynamic_sa_contents cts; 41 42 if (ctx->direction == DIR_INBOUND) 43 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents; 44 else 45 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents; 46 offset = cts.bf.key_size 47 + cts.bf.inner_size 48 + cts.bf.outer_size 49 + cts.bf.spi 50 + cts.bf.seq_num0 51 + cts.bf.seq_num1 52 + cts.bf.seq_num_mask0 53 + cts.bf.seq_num_mask1 54 + cts.bf.seq_num_mask2 55 + cts.bf.seq_num_mask3 56 + cts.bf.iv0 57 + cts.bf.iv1 58 + cts.bf.iv2 59 + cts.bf.iv3; 60 61 return sizeof(struct dynamic_sa_ctl) + offset * 4; 62 } 63 get_dynamic_sa_iv_size(struct crypto4xx_ctx * ctx)64u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx) 65 { 66 union dynamic_sa_contents cts; 67 68 if (ctx->direction == DIR_INBOUND) 69 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents; 70 else 71 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents; 72 return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4; 73 } 74 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx * ctx)75u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx) 76 { 77 union dynamic_sa_contents cts; 78 79 if (ctx->direction == DIR_INBOUND) 80 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents; 81 else 82 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents; 83 84 return sizeof(struct dynamic_sa_ctl); 85 } 86