^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * AES routines supporting VMX instructions on the Power 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2015 International Business Machines Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/simd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/switch_to.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <crypto/aes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <crypto/internal/cipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <crypto/internal/simd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "aesp8-ppc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct p8_aes_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct crypto_cipher *fallback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct aes_key enc_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct aes_key dec_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int p8_aes_init(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) const char *alg = crypto_tfm_alg_name(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct crypto_cipher *fallback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) fallback = crypto_alloc_cipher(alg, 0, CRYPTO_ALG_NEED_FALLBACK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (IS_ERR(fallback)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) "Failed to allocate transformation for '%s': %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) alg, PTR_ERR(fallback));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return PTR_ERR(fallback);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) crypto_cipher_set_flags(fallback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) crypto_cipher_get_flags((struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) crypto_cipher *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) tfm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) ctx->fallback = fallback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void p8_aes_exit(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (ctx->fallback) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) crypto_free_cipher(ctx->fallback);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ctx->fallback = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) pagefault_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) enable_kernel_vsx();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret |= aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) disable_kernel_vsx();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) pagefault_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ret |= crypto_cipher_setkey(ctx->fallback, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return ret ? -EINVAL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (!crypto_simd_usable()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) crypto_cipher_encrypt_one(ctx->fallback, dst, src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) pagefault_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) enable_kernel_vsx();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) aes_p8_encrypt(src, dst, &ctx->enc_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) disable_kernel_vsx();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) pagefault_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!crypto_simd_usable()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) crypto_cipher_decrypt_one(ctx->fallback, dst, src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) pagefault_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) enable_kernel_vsx();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) aes_p8_decrypt(src, dst, &ctx->dec_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) disable_kernel_vsx();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) pagefault_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct crypto_alg p8_aes_alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .cra_name = "aes",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .cra_driver_name = "p8_aes",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .cra_priority = 1000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .cra_type = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_NEED_FALLBACK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .cra_alignmask = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .cra_blocksize = AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .cra_ctxsize = sizeof(struct p8_aes_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .cra_init = p8_aes_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .cra_exit = p8_aes_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .cra_cipher = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .cia_min_keysize = AES_MIN_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .cia_max_keysize = AES_MAX_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .cia_setkey = p8_aes_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .cia_encrypt = p8_aes_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .cia_decrypt = p8_aes_decrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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