^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 CBC routines supporting the Power 7+ Nest Accelerators driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2011-2012 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: Kent Yoder <yoder1@us.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 <crypto/aes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <crypto/algapi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/vio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "nx_csbcpb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "nx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int cbc_aes_nx_set_key(struct crypto_skcipher *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) const u8 *in_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) unsigned int key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) nx_ctx_init(nx_ctx, HCOP_FC_AES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) switch (key_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) case AES_KEYSIZE_128:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) case AES_KEYSIZE_192:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) case AES_KEYSIZE_256:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) csbcpb->cpb.hdr.mode = NX_MODE_AES_CBC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) memcpy(csbcpb->cpb.aes_cbc.key, in_key, key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int cbc_aes_nx_crypt(struct skcipher_request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int enc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned long irq_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) unsigned int processed = 0, to_process;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) spin_lock_irqsave(&nx_ctx->lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (enc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) to_process = req->cryptlen - processed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) rc = nx_build_sg_lists(nx_ctx, req->iv, req->dst, req->src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) &to_process, processed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) csbcpb->cpb.aes_cbc.iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) memcpy(req->iv, csbcpb->cpb.aes_cbc.cv, AES_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) atomic_inc(&(nx_ctx->stats->aes_ops));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) atomic64_add(csbcpb->csb.processed_byte_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) &(nx_ctx->stats->aes_bytes));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) processed += to_process;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) } while (processed < req->cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int cbc_aes_nx_encrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return cbc_aes_nx_crypt(req, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int cbc_aes_nx_decrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return cbc_aes_nx_crypt(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct skcipher_alg nx_cbc_aes_alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .base.cra_name = "cbc(aes)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .base.cra_driver_name = "cbc-aes-nx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .base.cra_priority = 300,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .base.cra_blocksize = AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .base.cra_ctxsize = sizeof(struct nx_crypto_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .base.cra_alignmask = 0xf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .base.cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .init = nx_crypto_ctx_aes_cbc_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .exit = nx_crypto_ctx_skcipher_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .min_keysize = AES_MIN_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .max_keysize = AES_MAX_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .ivsize = AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .setkey = cbc_aes_nx_set_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .encrypt = cbc_aes_nx_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .decrypt = cbc_aes_nx_decrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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