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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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b20d9a73a3
The nx driver started out its life as a BE-only driver. However, somewhere along the way LE support was partially added. This never seems to have been extended all the way but it does trigger numerous warnings during build. This patch fixes all those warnings, but it doesn't mean that the driver will work on LE. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AES CBC routines supporting the Power 7+ Nest Accelerators driver
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*
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* Copyright (C) 2011-2012 International Business Machines Inc.
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*
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* Author: Kent Yoder <yoder1@us.ibm.com>
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*/
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#include <crypto/aes.h>
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#include <crypto/algapi.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/crypto.h>
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#include <asm/vio.h>
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#include "nx_csbcpb.h"
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#include "nx.h"
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static int cbc_aes_nx_set_key(struct crypto_skcipher *tfm,
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const u8 *in_key,
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unsigned int key_len)
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{
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struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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nx_ctx_init(nx_ctx, HCOP_FC_AES);
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switch (key_len) {
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case AES_KEYSIZE_128:
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
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break;
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case AES_KEYSIZE_192:
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
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break;
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case AES_KEYSIZE_256:
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NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
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break;
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default:
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return -EINVAL;
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}
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csbcpb->cpb.hdr.mode = NX_MODE_AES_CBC;
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memcpy(csbcpb->cpb.aes_cbc.key, in_key, key_len);
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return 0;
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}
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static int cbc_aes_nx_crypt(struct skcipher_request *req,
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int enc)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct nx_crypto_ctx *nx_ctx = crypto_skcipher_ctx(tfm);
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struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
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unsigned long irq_flags;
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unsigned int processed = 0, to_process;
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int rc;
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spin_lock_irqsave(&nx_ctx->lock, irq_flags);
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if (enc)
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NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
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else
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NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
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do {
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to_process = req->cryptlen - processed;
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rc = nx_build_sg_lists(nx_ctx, req->iv, req->dst, req->src,
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&to_process, processed,
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csbcpb->cpb.aes_cbc.iv);
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if (rc)
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goto out;
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if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
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rc = -EINVAL;
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goto out;
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}
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rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
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req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
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if (rc)
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goto out;
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memcpy(req->iv, csbcpb->cpb.aes_cbc.cv, AES_BLOCK_SIZE);
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atomic_inc(&(nx_ctx->stats->aes_ops));
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atomic64_add(be32_to_cpu(csbcpb->csb.processed_byte_count),
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&(nx_ctx->stats->aes_bytes));
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processed += to_process;
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} while (processed < req->cryptlen);
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out:
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spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
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return rc;
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}
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static int cbc_aes_nx_encrypt(struct skcipher_request *req)
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{
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return cbc_aes_nx_crypt(req, 1);
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}
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static int cbc_aes_nx_decrypt(struct skcipher_request *req)
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{
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return cbc_aes_nx_crypt(req, 0);
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}
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struct skcipher_alg nx_cbc_aes_alg = {
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.base.cra_name = "cbc(aes)",
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.base.cra_driver_name = "cbc-aes-nx",
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.base.cra_priority = 300,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct nx_crypto_ctx),
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.base.cra_alignmask = 0xf,
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.base.cra_module = THIS_MODULE,
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.init = nx_crypto_ctx_aes_cbc_init,
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.exit = nx_crypto_ctx_skcipher_exit,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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.setkey = cbc_aes_nx_set_key,
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.encrypt = cbc_aes_nx_encrypt,
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.decrypt = cbc_aes_nx_decrypt,
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};
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