diff options
Diffstat (limited to 'drivers/crypto/chelsio/chcr_algo.c')
| -rw-r--r-- | drivers/crypto/chelsio/chcr_algo.c | 1525 |
1 files changed, 1525 insertions, 0 deletions
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c new file mode 100644 index 000000000000..e4ddb921d7b3 --- /dev/null +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -0,0 +1,1525 @@ +/* + * This file is part of the Chelsio T6 Crypto driver for Linux. + * + * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Written and Maintained by: + * Manoj Malviya (manojmalviya@chelsio.com) + * Atul Gupta (atul.gupta@chelsio.com) + * Jitendra Lulla (jlulla@chelsio.com) + * Yeshaswi M R Gowda (yeshaswi@chelsio.com) + * Harsh Jain (harsh@chelsio.com) + */ + +#define pr_fmt(fmt) "chcr:" fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/crypto.h> +#include <linux/cryptohash.h> +#include <linux/skbuff.h> +#include <linux/rtnetlink.h> +#include <linux/highmem.h> +#include <linux/scatterlist.h> + +#include <crypto/aes.h> +#include <crypto/algapi.h> +#include <crypto/hash.h> +#include <crypto/sha.h> +#include <crypto/internal/hash.h> + +#include "t4fw_api.h" +#include "t4_msg.h" +#include "chcr_core.h" +#include "chcr_algo.h" +#include "chcr_crypto.h" + +static inline struct ablk_ctx *ABLK_CTX(struct chcr_context *ctx) +{ + return ctx->crypto_ctx->ablkctx; +} + +static inline struct hmac_ctx *HMAC_CTX(struct chcr_context *ctx) +{ + return ctx->crypto_ctx->hmacctx; +} + +static inline struct uld_ctx *ULD_CTX(struct chcr_context *ctx) +{ + return ctx->dev->u_ctx; +} + +static inline int is_ofld_imm(const struct sk_buff *skb) +{ + return (skb->len <= CRYPTO_MAX_IMM_TX_PKT_LEN); +} + +/* + * sgl_len - calculates the size of an SGL of the given capacity + * @n: the number of SGL entries + * Calculates the number of flits needed for a scatter/gather list that + * can hold the given number of entries. + */ +static inline unsigned int sgl_len(unsigned int n) +{ + n--; + return (3 * n) / 2 + (n & 1) + 2; +} + +/* + * chcr_handle_resp - Unmap the DMA buffers associated with the request + * @req: crypto request + */ +int chcr_handle_resp(struct crypto_async_request *req, unsigned char *input, + int error_status) +{ + struct crypto_tfm *tfm = req->tfm; + struct chcr_context *ctx = crypto_tfm_ctx(tfm); + struct uld_ctx *u_ctx = ULD_CTX(ctx); + struct chcr_req_ctx ctx_req; + struct cpl_fw6_pld *fw6_pld; + unsigned int digestsize, updated_digestsize; + + switch (tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { + case CRYPTO_ALG_TYPE_BLKCIPHER: + ctx_req.req.ablk_req = (struct ablkcipher_request *)req; + ctx_req.ctx.ablk_ctx = + ablkcipher_request_ctx(ctx_req.req.ablk_req); + if (!error_status) { + fw6_pld = (struct cpl_fw6_pld *)input; + memcpy(ctx_req.req.ablk_req->info, &fw6_pld->data[2], + AES_BLOCK_SIZE); + } + dma_unmap_sg(&u_ctx->lldi.pdev->dev, ctx_req.req.ablk_req->dst, + ABLK_CTX(ctx)->dst_nents, DMA_FROM_DEVICE); + if (ctx_req.ctx.ablk_ctx->skb) { + kfree_skb(ctx_req.ctx.ablk_ctx->skb); + ctx_req.ctx.ablk_ctx->skb = NULL; + } + break; + + case CRYPTO_ALG_TYPE_AHASH: + ctx_req.req.ahash_req = (struct ahash_request *)req; + ctx_req.ctx.ahash_ctx = + ahash_request_ctx(ctx_req.req.ahash_req); + digestsize = + crypto_ahash_digestsize(crypto_ahash_reqtfm( + ctx_req.req.ahash_req)); + updated_digestsize = digestsize; + if (digestsize == SHA224_DIGEST_SIZE) + updated_digestsize = SHA256_DIGEST_SIZE; + else if (digestsize == SHA384_DIGEST_SIZE) + updated_digestsize = SHA512_DIGEST_SIZE; + if (ctx_req.ctx.ahash_ctx->skb) + ctx_req.ctx.ahash_ctx->skb = NULL; + if (ctx_req.ctx.ahash_ctx->result == 1) { + ctx_req.ctx.ahash_ctx->result = 0; + memcpy(ctx_req.req.ahash_req->result, input + + sizeof(struct cpl_fw6_pld), + digestsize); + } else { + memcpy(ctx_req.ctx.ahash_ctx->partial_hash, input + + sizeof(struct cpl_fw6_pld), + updated_digestsize); + } + kfree(ctx_req.ctx.ahash_ctx->dummy_payload_ptr); + ctx_req.ctx.ahash_ctx->dummy_payload_ptr = NULL; + break; + } + return 0; +} + +/* + * calc_tx_flits_ofld - calculate # of flits for an offload packet + * @skb: the packet + * Returns the number of flits needed for the given offload packet. + * These packets are already fully constructed and no additional headers + * will be added. + */ +static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) +{ + unsigned int flits, cnt; + + if (is_ofld_imm(skb)) + return DIV_ROUND_UP(skb->len, 8); + + flits = skb_transport_offset(skb) / 8; /* headers */ + cnt = skb_shinfo(skb)->nr_frags; + if (skb_tail_pointer(skb) != skb_transport_header(skb)) + cnt++; + return flits + sgl_len(cnt); +} + +static struct shash_desc *chcr_alloc_shash(unsigned int ds) +{ + struct crypto_shash *base_hash = NULL; + struct shash_desc *desc; + + switch (ds) { + case SHA1_DIGEST_SIZE: + base_hash = crypto_alloc_shash("sha1-generic", 0, 0); + break; + case SHA224_DIGEST_SIZE: + base_hash = crypto_alloc_shash("sha224-generic", 0, 0); + break; + case SHA256_DIGEST_SIZE: + base_hash = crypto_alloc_shash("sha256-generic", 0, 0); + break; + case SHA384_DIGEST_SIZE: + base_hash = crypto_alloc_shash("sha384-generic", 0, 0); + break; + case SHA512_DIGEST_SIZE: + base_hash = crypto_alloc_shash("sha512-generic", 0, 0); + break; + } + if (IS_ERR(base_hash)) { + pr_err("Can not allocate sha-generic algo.\n"); + return (void *)base_hash; + } + + desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(base_hash), + GFP_KERNEL); + if (!desc) + return ERR_PTR(-ENOMEM); + desc->tfm = base_hash; + desc->flags = crypto_shash_get_flags(base_hash); + return desc; +} + +static int chcr_compute_partial_hash(struct shash_desc *desc, + char *iopad, char *result_hash, + int digest_size) +{ + struct sha1_state sha1_st; + struct sha256_state sha256_st; + struct sha512_state sha512_st; + int error; + + if (digest_size == SHA1_DIGEST_SIZE) { + error = crypto_shash_init(desc) ?: + crypto_shash_update(desc, iopad, SHA1_BLOCK_SIZE) ?: + crypto_shash_export(desc, (void *)&sha1_st); + memcpy(result_hash, sha1_st.state, SHA1_DIGEST_SIZE); + } else if (digest_size == SHA224_DIGEST_SIZE) { + error = crypto_shash_init(desc) ?: + crypto_shash_update(desc, iopad, SHA256_BLOCK_SIZE) ?: + crypto_shash_export(desc, (void *)&sha256_st); + memcpy(result_hash, sha256_st.state, SHA256_DIGEST_SIZE); + + } else if (digest_size == SHA256_DIGEST_SIZE) { + error = crypto_shash_init(desc) ?: + crypto_shash_update(desc, iopad, SHA256_BLOCK_SIZE) ?: + crypto_shash_export(desc, (void *)&sha256_st); + memcpy(result_hash, sha256_st.state, SHA256_DIGEST_SIZE); + + } else if (digest_size == SHA384_DIGEST_SIZE) { + error = crypto_shash_init(desc) ?: + crypto_shash_update(desc, iopad, SHA512_BLOCK_SIZE) ?: + crypto_shash_export(desc, (void *)&sha512_st); + memcpy(result_hash, sha512_st.state, SHA512_DIGEST_SIZE); + + } else if (digest_size == SHA512_DIGEST_SIZE) { + error = crypto_shash_init(desc) ?: + crypto_shash_update(desc, iopad, SHA512_BLOCK_SIZE) ?: + crypto_shash_export(desc, (void *)&sha512_st); + memcpy(result_hash, sha512_st.state, SHA512_DIGEST_SIZE); + } else { + error = -EINVAL; + pr_err("Unknown digest size %d\n", digest_size); + } + return error; +} + +static void chcr_change_order(char *buf, int ds) +{ + int i; + + if (ds == SHA512_DIGEST_SIZE) { + for (i = 0; i < (ds / sizeof(u64)); i++) + *((__be64 *)buf + i) = + cpu_to_be64(*((u64 *)buf + i)); + } else { + for (i = 0; i < (ds / sizeof(u32)); i++) + *((__be32 *)buf + i) = + cpu_to_be32(*((u32 *)buf + i)); + } +} + +static inline int is_hmac(struct crypto_tfm *tfm) +{ + struct crypto_alg *alg = tfm->__crt_alg; + struct chcr_alg_template *chcr_crypto_alg = + container_of(__crypto_ahash_alg(alg), struct chcr_alg_template, + alg.hash); + if ((chcr_crypto_alg->type & CRYPTO_ALG_SUB_TYPE_MASK) == + CRYPTO_ALG_SUB_TYPE_HASH_HMAC) + return 1; + return 0; +} + +static inline unsigned int ch_nents(struct scatterlist *sg, + unsigned int *total_size) +{ + unsigned int nents; + + for (nents = 0, *total_size = 0; sg; sg = sg_next(sg)) { + nents++; + *total_size += sg->length; + } + return nents; +} + +static void write_phys_cpl(struct cpl_rx_phys_dsgl *phys_cpl, + struct scatterlist *sg, + struct phys_sge_parm *sg_param) +{ + struct phys_sge_pairs *to; + unsigned int out_buf_size = sg_param->obsize; + unsigned int nents = sg_param->nents, i, j, tot_len = 0; + + phys_cpl->op_to_tid = htonl(CPL_RX_PHYS_DSGL_OPCODE_V(CPL_RX_PHYS_DSGL) + | CPL_RX_PHYS_DSGL_ISRDMA_V(0)); + phys_cpl->pcirlxorder_to_noofsgentr = + htonl(CPL_RX_PHYS_DSGL_PCIRLXORDER_V(0) | + CPL_RX_PHYS_DSGL_PCINOSNOOP_V(0) | + CPL_RX_PHYS_DSGL_PCITPHNTENB_V(0) | + CPL_RX_PHYS_DSGL_PCITPHNT_V(0) | + CPL_RX_PHYS_DSGL_DCAID_V(0) | + CPL_RX_PHYS_DSGL_NOOFSGENTR_V(nents)); + phys_cpl->rss_hdr_int.opcode = CPL_RX_PHYS_ADDR; + phys_cpl->rss_hdr_int.qid = htons(sg_param->qid); + phys_cpl->rss_hdr_int.hash_val = 0; + to = (struct phys_sge_pairs *)((unsigned char *)phys_cpl + + sizeof(struct cpl_rx_phys_dsgl)); + + for (i = 0; nents; to++) { + for (j = i; (nents && (j < (8 + i))); j++, nents--) { + to->len[j] = htons(sg->length); + to->addr[j] = cpu_to_be64(sg_dma_address(sg)); + if (out_buf_size) { + if (tot_len + sg_dma_len(sg) >= out_buf_size) { + to->len[j] = htons(out_buf_size - + tot_len); + return; + } + tot_len += sg_dma_len(sg); + } + sg = sg_next(sg); + } + } +} + +static inline unsigned +int map_writesg_phys_cpl(struct device *dev, struct cpl_rx_phys_dsgl *phys_cpl, + struct scatterlist *sg, struct phys_sge_parm *sg_param) +{ + if (!sg || !sg_param->nents) + return 0; + + sg_param->nents = dma_map_sg(dev, sg, sg_param->nents, DMA_FROM_DEVICE); + if (sg_param->nents == 0) { + pr_err("CHCR : DMA mapping failed\n"); + return -EINVAL; + } + write_phys_cpl(phys_cpl, sg, sg_param); + return 0; +} + +static inline int get_cryptoalg_subtype(struct crypto_tfm *tfm) +{ + struct crypto_alg *alg = tfm->__crt_alg; + struct chcr_alg_template *chcr_crypto_alg = + container_of(alg, struct chcr_alg_template, alg.crypto); + + return chcr_crypto_alg->type & CRYPTO_ALG_SUB_TYPE_MASK; +} + +static inline void +write_sg_data_page_desc(struct sk_buff *skb, unsigned int *frags, + struct scatterlist *sg, unsigned int count) +{ + struct page *spage; + unsigned int page_len; + + skb->len += count; + skb->data_len += count; + skb->truesize += count; + while (count > 0) { + if (sg && (!(sg->length))) + break; + spage = sg_page(sg); + get_page(spage); + page_len = min(sg->length, count); + skb_fill_page_desc(skb, *frags, spage, sg->offset, page_len); + (*frags)++; + count -= page_len; + sg = sg_next(sg); + } +} + +static int generate_copy_rrkey(struct ablk_ctx *ablkctx, + struct _key_ctx *key_ctx) +{ + if (ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC) { + get_aes_decrypt_key(key_ctx->key, ablkctx->key, + ablkctx->enckey_len << 3); + memset(key_ctx->key + ablkctx->enckey_len, 0, + CHCR_AES_MAX_KEY_LEN - ablkctx->enckey_len); + } else { + memcpy(key_ctx->key, + ablkctx->key + (ablkctx->enckey_len >> 1), + ablkctx->enckey_len >> 1); + get_aes_decrypt_key(key_ctx->key + (ablkctx->enckey_len >> 1), + ablkctx->key, ablkctx->enckey_len << 2); + } + return 0; +} + +static inline void create_wreq(struct chcr_context *ctx, + struct fw_crypto_lookaside_wr *wreq, + void *req, struct sk_buff *skb, + int kctx_len, int hash_sz, + unsigned int phys_dsgl) +{ + struct uld_ctx *u_ctx = ULD_CTX(ctx); + struct ulp_txpkt *ulptx = (struct ulp_txpkt *)(wreq + 1); + struct ulptx_idata *sc_imm = (struct ulptx_idata *)(ulptx + 1); + int iv_loc = IV_DSGL; + int qid = u_ctx->lldi.rxq_ids[ctx->tx_channel_id]; + unsigned int immdatalen = 0, nr_frags = 0; + + if (is_ofld_imm(skb)) { + immdatalen = skb->data_len; + iv_loc = IV_IMMEDIATE; + } else { + nr_frags = skb_shinfo(skb)->nr_frags; + } + + wreq->op_to_cctx_size = FILL_WR_OP_CCTX_SIZE(immdatalen, + (kctx_len >> 4)); + wreq->pld_size_hash_size = + htonl(FW_CRYPTO_LOOKASIDE_WR_PLD_SIZE_V(sgl_lengths[nr_frags]) | + FW_CRYPTO_LOOKASIDE_WR_HASH_SIZE_V(hash_sz)); + wreq->len16_pkd = htonl(FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP( + (calc_tx_flits_ofld(skb) * 8), 16))); + wreq->cookie = cpu_to_be64((uintptr_t)req); + wreq->rx_chid_to_rx_q_id = + FILL_WR_RX_Q_ID(ctx->dev->tx_channel_id, qid, + (hash_sz) ? IV_NOP : iv_loc); + + ulptx->cmd_dest = FILL_ULPTX_CMD_DEST(ctx->dev->tx_channel_id); + ulptx->len = htonl((DIV_ROUND_UP((calc_tx_flits_ofld(skb) * 8), + 16) - ((sizeof(*wreq)) >> 4))); + + sc_imm->cmd_more = FILL_CMD_MORE(immdatalen); + sc_imm->len = cpu_to_be32(sizeof(struct cpl_tx_sec_pdu) + kctx_len + + ((hash_sz) ? DUMMY_BYTES : + (sizeof(struct cpl_rx_phys_dsgl) + + phys_dsgl)) + immdatalen); +} + +/** + * create_cipher_wr - form the WR for cipher operations + * @req: cipher req. + * @ctx: crypto driver context of the request. + * @qid: ingress qid where response of this WR should be received. + * @op_type: encryption or decryption + */ +static struct sk_buff +*create_cipher_wr(struct crypto_async_request *req_base, + struct chcr_context *ctx, unsigned short qid, + unsigned short op_type) +{ + struct ablkcipher_request *req = (struct ablkcipher_request *)req_base; + struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); + struct uld_ctx *u_ctx = ULD_CTX(ctx); + struct ablk_ctx *ablkctx = ABLK_CTX(ctx); + struct sk_buff *skb = NULL; + struct _key_ctx *key_ctx; + struct fw_crypto_lookaside_wr *wreq; + struct cpl_tx_sec_pdu *sec_cpl; + struct cpl_rx_phys_dsgl *phys_cpl; + struct chcr_blkcipher_req_ctx *req_ctx = ablkcipher_request_ctx(req); + struct phys_sge_parm sg_param; + unsigned int frags = 0, transhdr_len, phys_dsgl, dst_bufsize = 0; + unsigned int ivsize = crypto_ablkcipher_ivsize(tfm), kctx_len; + + if (!req->info) + return ERR_PTR(-EINVAL); + ablkctx->dst_nents = ch_nents(req->dst, &dst_bufsize); + ablkctx->enc = op_type; + + if ((ablkctx->enckey_len == 0) || (ivsize > AES_BLOCK_SIZE) || + (req->nbytes <= 0) || (req->nbytes % AES_BLOCK_SIZE)) + return ERR_PTR(-EINVAL); + + phys_dsgl = get_space_for_phys_dsgl(ablkctx->dst_nents); + + kctx_len = sizeof(*key_ctx) + + (DIV_ROUND_UP(ablkctx->enckey_len, 16) * 16); + transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, phys_dsgl); + skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), + GFP_ATOMIC); + if (!skb) + return ERR_PTR(-ENOMEM); + skb_reserve(skb, sizeof(struct sge_opaque_hdr)); + wreq = (struct fw_crypto_lookaside_wr *)__skb_put(skb, transhdr_len); + + sec_cpl = (struct cpl_tx_sec_pdu *)((u8 *)wreq + SEC_CPL_OFFSET); + sec_cpl->op_ivinsrtofst = + FILL_SEC_CPL_OP_IVINSR(ctx->dev->tx_channel_id, 2, 1, 1); + + sec_cpl->pldlen = htonl(ivsize + req->nbytes); + sec_cpl->aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI(0, 0, + ivsize + 1, 0); + + sec_cpl->cipherstop_lo_authinsert = FILL_SEC_CPL_AUTHINSERT(0, 0, + 0, 0); + sec_cpl->seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(op_type, 0, + ablkctx->ciph_mode, + 0, 0, ivsize >> 1, 1); + sec_cpl->ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 0, + 0, 1, phys_dsgl); + + key_ctx = (struct _key_ctx *)((u8 *)sec_cpl + sizeof(*sec_cpl)); + key_ctx->ctx_hdr = ablkctx->key_ctx_hdr; + if (op_type == CHCR_DECRYPT_OP) { + if (generate_copy_rrkey(ablkctx, key_ctx)) + goto map_fail1; + } else { + if (ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC) { + memcpy(key_ctx->key, ablkctx->key, ablkctx->enckey_len); + } else { + memcpy(key_ctx->key, ablkctx->key + + (ablkctx->enckey_len >> 1), + ablkctx->enckey_len >> 1); + memcpy(key_ctx->key + + (ablkctx->enckey_len >> 1), + ablkctx->key, + ablkctx->enckey_len >> 1); + } + } + phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)key_ctx + kctx_len); + + memcpy(ablkctx->iv, req->info, ivsize); + sg_init_table(&ablkctx->iv_sg, 1); + sg_set_buf(&ablkctx->iv_sg, ablkctx->iv, ivsize); + sg_param.nents = ablkctx->dst_nents; + sg_param.obsize = dst_bufsize; + sg_param.qid = qid; + sg_param.align = 1; + if (map_writesg_phys_cpl(&u_ctx->lldi.pdev->dev, phys_cpl, req->dst, + &sg_param)) + goto map_fail1; + + skb_set_transport_header(skb, transhdr_len); + write_sg_data_page_desc(skb, &frags, &ablkctx->iv_sg, ivsize); + write_sg_data_page_desc(skb, &frags, req->src, req->nbytes); + create_wreq(ctx, wreq, req, skb, kctx_len, 0, phys_dsgl); + req_ctx->skb = skb; + skb_get(skb); + return skb; +map_fail1: + kfree_skb(skb); + return ERR_PTR(-ENOMEM); +} + +static int chcr_aes_cbc_setkey(struct crypto_ablkcipher *tfm, const u8 *key, + unsigned int keylen) +{ + struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); + struct ablk_ctx *ablkctx = ABLK_CTX(ctx); + struct ablkcipher_alg *alg = crypto_ablkcipher_alg(tfm); + unsigned int ck_size, context_size; + u16 alignment = 0; + + if ((keylen < alg->min_keysize) || (keylen > alg->max_keysize)) + goto badkey_err; + + memcpy(ablkctx->key, key, keylen); + ablkctx->enckey_len = keylen; + if (keylen == AES_KEYSIZE_128) { + ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; + } else if (keylen == AES_KEYSIZE_192) { + alignment = 8; + ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; + } else if (keylen == AES_KEYSIZE_256) { + ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; + } else { + goto badkey_err; + } + + context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + + keylen + alignment) >> 4; + + ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, + 0, 0, context_size); + ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CBC; + return 0; +badkey_err: + crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); + ablkctx->enckey_len = 0; + return -EINVAL; +} + +static int cxgb4_is_crypto_q_full(struct net_device *dev, unsigned int idx) +{ + int ret = 0; + struct sge_ofld_txq *q; + struct adapter *adap = netdev2adap(dev); + + local_bh_disable(); + q = &adap->sge.ofldtxq[idx]; + spin_lock(&q->sendq.lock); + if (q->full) + ret = -1; + spin_unlock(&q->sendq.lock); + local_bh_enable(); + return ret; +} + +static int chcr_aes_encrypt(struct ablkcipher_request *req) +{ + struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); + struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); + struct crypto_async_request *req_base = &req->base; + struct uld_ctx *u_ctx = ULD_CTX(ctx); + struct sk_buff *skb; + + if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], + ctx->tx_channel_id))) { + if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + return -EBUSY; + } + + skb = create_cipher_wr(req_base, ctx, + u_ctx->lldi.rxq_ids[ctx->tx_channel_id], + CHCR_ENCRYPT_OP); + if (IS_ERR(skb)) { + pr_err("chcr : %s : Failed to form WR. No memory\n", __func__); + return PTR_ERR(skb); + } + skb->dev = u_ctx->lldi.ports[0]; + set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_channel_id); + chcr_send_wr(skb); + return -EINPROGRESS; +} + +static int chcr_aes_decrypt(struct ablkcipher_request *req) +{ + struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); + struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); + struct crypto_async_request *req_base = &req->base; + struct uld_ctx *u_ctx = ULD_CTX(ctx); + struct sk_buff *skb; + + if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], + ctx->tx_channel_id))) { + if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + return -EBUSY; + } + + skb = create_cipher_wr(req_base, ctx, u_ctx->lldi.rxq_ids[0], + CHCR_DECRYPT_OP); + if (IS_ERR(skb)) { + pr_err("chcr : %s : Failed to form WR. No memory\n", __func__); + return PTR_ERR(skb); + } + skb->dev = u_ctx->lldi.ports[0]; + set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_channel_id); + chcr_send_wr(skb); + return -EINPROGRESS; +} + +static int chcr_device_init(struct chcr_context *ctx) +{ + struct uld_ctx *u_ctx; + unsigned int id; + int err = 0, rxq_perchan, rxq_idx; + + id = smp_processor_id(); + if (!ctx->dev) { + err = assign_chcr_device(&ctx->dev); + if (err) { + pr_err("chcr device assignment fails\n"); + goto out; + } + u_ctx = ULD_CTX(ctx); + rxq_perchan = u_ctx->lldi.nrxq / u_ctx->lldi.nchan; + ctx->dev->tx_channel_id = 0; + rxq_idx = ctx->dev->tx_channel_id * rxq_perchan; + rxq_idx += id % rxq_perchan; + spin_lock(&ctx->dev->lock_chcr_dev); + ctx->tx_channel_id = rxq_idx; + spin_unlock(&ctx->dev->lock_chcr_dev); + } +out: + return err; +} + +static int chcr_cra_init(struct crypto_tfm *tfm) +{ + tfm->crt_ablkcipher.reqsize = sizeof(struct chcr_blkcipher_req_ctx); + return chcr_device_init(crypto_tfm_ctx(tfm)); +} + +static int get_alg_config(struct algo_param *params, + unsigned int auth_size) +{ + switch (auth_size) { + case SHA1_DIGEST_SIZE: + params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_160; + params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA1; + params->result_size = SHA1_DIGEST_SIZE; + break; + case SHA224_DIGEST_SIZE: + params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; + params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA224; + params->result_size = SHA256_DIGEST_SIZE; + break; + case SHA256_DIGEST_SIZE: + params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; + params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA256; + params->result_size = SHA256_DIGEST_SIZE; + break; + case SHA384_DIGEST_SIZE: + params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512; + params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA512_384; + params->result_size = SHA512_DIGEST_SIZE; + break; + case SHA512_DIGEST_SIZE: + params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512; + params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA512_512; + params->result_size = SHA512_DIGEST_SIZE; + break; + default: + pr_err("chcr : ERROR, unsupported digest size\n"); + return -EINVAL; + } + return 0; +} + +static inline int +write_buffer_data_page_desc(struct chcr_ahash_req_ctx *req_ctx, + struct sk_buff *skb, unsigned int *frags, char *bfr, + u8 bfr_len) +{ + void *page_ptr = NULL; + + skb->len += bfr_len; + skb->data_len += bfr_len; + skb->truesize += bfr_len; + page_ptr = kmalloc(CHCR_HASH_MAX_BLOCK_SIZE_128, GFP_ATOMIC | GFP_DMA); + if (!page_ptr) + return -ENOMEM; + get_page(virt_to_page(page_ptr)); + req_ctx->dummy_payload_ptr = page_ptr; + memcpy(page_ptr, bfr, bfr_len); + skb_fill_page_desc(skb, *frags, virt_to_page(page_ptr), + offset_in_page(page_ptr), bfr_len); + (*frags)++; + return 0; +} + +/** + * create_final_hash_wr - Create hash work request + * @req - Cipher req base + */ +static struct sk_buff *create_final_hash_wr(struct ahash_request *req, + struct hash_wr_param *param) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm)); + struct hmac_ctx *hmacctx = HMAC_CTX(ctx); + struct sk_buff *skb = NULL; + struct _key_ctx *key_ctx; + struct fw_crypto_lookaside_wr *wreq; + struct cpl_tx_sec_pdu *sec_cpl; + unsigned int frags = 0, transhdr_len, iopad_alignment = 0; + unsigned int digestsize = crypto_ahash_digestsize(tfm); + unsigned int kctx_len = sizeof(*key_ctx); + u8 hash_size_in_response = 0; + + iopad_alignment = KEYCTX_ALIGN_PAD(digestsize); + kctx_len += param->alg_prm.result_size + iopad_alignment; + if (param->opad_needed) + kctx_len += param->alg_prm.result_size + iopad_alignment; + + if (req_ctx->result) + hash_size_in_response = digestsize; + else + hash_size_in_response = param->alg_prm.result_size; + transhdr_len = HASH_TRANSHDR_SIZE(kctx_len); + skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), + GFP_ATOMIC); + if (!skb) + return skb; + + skb_reserve(skb, sizeof(struct sge_opaque_hdr)); + wreq = (struct fw_crypto_lookaside_wr *)__skb_put(skb, transhdr_len); + memset(wreq, 0, transhdr_len); + + sec_cpl = (struct cpl_tx_sec_pdu *)((u8 *)wreq + SEC_CPL_OFFSET); + sec_cpl->op_ivinsrtofst = + FILL_SEC_CPL_OP_IVINSR(ctx->dev->tx_channel_id, 2, 0, 0); + sec_cpl->pldlen = htonl(param->bfr_len + param->sg_len); + + sec_cpl->aadstart_cipherstop_hi = + FILL_SEC_CPL_CIPHERSTOP_HI(0, 0, 0, 0); + sec_cpl->cipherstop_lo_authinsert = + FILL_SEC_CPL_AUTHINSERT(0, 1, 0, 0); + sec_cpl->seqno_numivs = + FILL_SEC_CPL_SCMD0_SEQNO(0, 0, 0, param->alg_prm.auth_mode, + param->opad_needed, 0, 0); + + sec_cpl->ivgen_hdrlen = + FILL_SEC_CPL_IVGEN_HDRLEN(param->last, param->more, 0, 1, 0, 0); + + key_ctx = (struct _key_ctx *)((u8 *)sec_cpl + sizeof(*sec_cpl)); + memcpy(key_ctx->key, req_ctx->partial_hash, param->alg_prm.result_size); + + if (param->opad_needed) + memcpy(key_ctx->key + ((param->alg_prm.result_size <= 32) ? 32 : + CHCR_HASH_MAX_DIGEST_SIZE), + hmacctx->opad, param->alg_prm.result_size); + + key_ctx->ctx_hdr = FILL_KEY_CTX_HDR(CHCR_KEYCTX_NO_KEY, + param->alg_prm.mk_size, 0, + param->opad_needed, + (kctx_len >> 4)); + sec_cpl->scmd1 = cpu_to_be64((u64)param->scmd1); + + skb_set_transport_header(skb, transhdr_len); + if (param->bfr_len != 0) + write_buffer_data_page_desc(req_ctx, skb, &frags, req_ctx->bfr, + param->bfr_len); + if (param->sg_len != 0) + write_sg_data_page_desc(skb, &frags, req->src, param->sg_len); + + create_wreq(ctx, wreq, req, skb, kctx_len, hash_size_in_response, + 0); + req_ctx->skb = skb; + skb_get(skb); + return skb; +} + +static int chcr_ahash_update(struct ahash_request *req) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); + struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); + struct uld_ctx *u_ctx = NULL; + struct sk_buff *skb; + u8 remainder = 0, bs; + unsigned int nbytes = req->nbytes; + struct hash_wr_param params; + + bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); + + u_ctx = ULD_CTX(ctx); + if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], + ctx->tx_channel_id))) { + if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + return -EBUSY; + } + + if (nbytes + req_ctx->bfr_len >= bs) { + remainder = (nbytes + req_ctx->bfr_len) % bs; + nbytes = nbytes + req_ctx->bfr_len - remainder; + } else { + sg_pcopy_to_buffer(req->src, sg_nents(req->src), req_ctx->bfr + + req_ctx->bfr_len, nbytes, 0); + req_ctx->bfr_len += nbytes; + return 0; + } + + params.opad_needed = 0; + params.more = 1; + params.last = 0; + params.sg_len = nbytes - req_ctx->bfr_len; + params.bfr_len = req_ctx->bfr_len; + params.scmd1 = 0; + get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); + req_ctx->result = 0; + req_ctx->data_len += params.sg_len + params.bfr_len; + skb = create_final_hash_wr(req, ¶ms); + if (!skb) + return -ENOMEM; + + req_ctx->bfr_len = remainder; + if (remainder) + sg_pcopy_to_buffer(req->src, sg_nents(req->src), + req_ctx->bfr, remainder, req->nbytes - + remainder); + skb->dev = u_ctx->lldi.ports[0]; + set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_channel_id); + chcr_send_wr(skb); + + return -EINPROGRESS; +} + +static void create_last_hash_block(char *bfr_ptr, unsigned int bs, u64 scmd1) +{ + memset(bfr_ptr, 0, bs); + *bfr_ptr = 0x80; + if (bs == 64) + *(__be64 *)(bfr_ptr + 56) = cpu_to_be64(scmd1 << 3); + else + *(__be64 *)(bfr_ptr + 120) = cpu_to_be64(scmd1 << 3); +} + +static int chcr_ahash_final(struct ahash_request *req) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); + struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); + struct hash_wr_param params; + struct sk_buff *skb; + struct uld_ctx *u_ctx = NULL; + u8 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); + + u_ctx = ULD_CTX(ctx); + if (is_hmac(crypto_ahash_tfm(rtfm))) + params.opad_needed = 1; + else + params.opad_needed = 0; + params.sg_len = 0; + get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); + req_ctx->result = 1; + params.bfr_len = req_ctx->bfr_len; + req_ctx->data_len += params.bfr_len + params.sg_len; + if (req_ctx->bfr && (req_ctx->bfr_len == 0)) { + create_last_hash_block(req_ctx->bfr, bs, req_ctx->data_len); + params.last = 0; + params.more = 1; + params.scmd1 = 0; + params.bfr_len = bs; + + } else { + params.scmd1 = req_ctx->data_len; + params.last = 1; + params.more = 0; + } + skb = create_final_hash_wr(req, ¶ms); + skb->dev = u_ctx->lldi.ports[0]; + set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_channel_id); + chcr_send_wr(skb); + return -EINPROGRESS; +} + +static int chcr_ahash_finup(struct ahash_request *req) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); + struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); + struct uld_ctx *u_ctx = NULL; + struct sk_buff *skb; + struct hash_wr_param params; + u8 bs; + + bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); + u_ctx = ULD_CTX(ctx); + + if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], + ctx->tx_channel_id))) { + if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + return -EBUSY; + } + + if (is_hmac(crypto_ahash_tfm(rtfm))) + params.opad_needed = 1; + else + params.opad_needed = 0; + + params.sg_len = req->nbytes; + params.bfr_len = req_ctx->bfr_len; + get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); + req_ctx->data_len += params.bfr_len + params.sg_len; + req_ctx->result = 1; + if (req_ctx->bfr && (req_ctx->bfr_len + req->nbytes) == 0) { + create_last_hash_block(req_ctx->bfr, bs, req_ctx->data_len); + params.last = 0; + params.more = 1; + params.scmd1 = 0; + params.bfr_len = bs; + } else { + params.scmd1 = req_ctx->data_len; + params.last = 1; + params.more = 0; + } + + skb = create_final_hash_wr(req, ¶ms); + if (!skb) + return -ENOMEM; + skb->dev = u_ctx->lldi.ports[0]; + set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_channel_id); + chcr_send_wr(skb); + + return -EINPROGRESS; +} + +static int chcr_ahash_digest(struct ahash_request *req) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); + struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); + struct uld_ctx *u_ctx = NULL; + struct sk_buff *skb; + struct hash_wr_param params; + u8 bs; + + rtfm->init(req); + bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); + + u_ctx = ULD_CTX(ctx); + if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], + ctx->tx_channel_id))) { + if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + return -EBUSY; + } + + if (is_hmac(crypto_ahash_tfm(rtfm))) + params.opad_needed = 1; + else + params.opad_needed = 0; + + params.last = 0; + params.more = 0; + params.sg_len = req->nbytes; + params.bfr_len = 0; + params.scmd1 = 0; + get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); + req_ctx->result = 1; + req_ctx->data_len += params.bfr_len + params.sg_len; + + if (req_ctx->bfr && req->nbytes == 0) { + create_last_hash_block(req_ctx->bfr, bs, 0); + params.more = 1; + params.bfr_len = bs; + } + + skb = create_final_hash_wr(req, ¶ms); + if (!skb) + return -ENOMEM; + + skb->dev = u_ctx->lldi.ports[0]; + set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_channel_id); + chcr_send_wr(skb); + return -EINPROGRESS; +} + +static int chcr_ahash_export(struct ahash_request *areq, void *out) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); + struct chcr_ahash_req_ctx *state = out; + + state->bfr_len = req_ctx->bfr_len; + state->data_len = req_ctx->data_len; + memcpy(state->bfr, req_ctx->bfr, CHCR_HASH_MAX_BLOCK_SIZE_128); + memcpy(state->partial_hash, req_ctx->partial_hash, + CHCR_HASH_MAX_DIGEST_SIZE); + return 0; +} + +static int chcr_ahash_import(struct ahash_request *areq, const void *in) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); + struct chcr_ahash_req_ctx *state = (struct chcr_ahash_req_ctx *)in; + + req_ctx->bfr_len = state->bfr_len; + req_ctx->data_len = state->data_len; + req_ctx->dummy_payload_ptr = NULL; + memcpy(req_ctx->bfr, state->bfr, CHCR_HASH_MAX_BLOCK_SIZE_128); + memcpy(req_ctx->partial_hash, state->partial_hash, + CHCR_HASH_MAX_DIGEST_SIZE); + return 0; +} + +static int chcr_ahash_setkey(struct crypto_ahash *tfm, const u8 *key, + unsigned int keylen) +{ + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm)); + struct hmac_ctx *hmacctx = HMAC_CTX(ctx); + unsigned int digestsize = crypto_ahash_digestsize(tfm); + unsigned int bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm)); + unsigned int i, err = 0, updated_digestsize; + + /* + * use the key to calculate the ipad and opad. ipad will sent with the + * first request's data. opad will be sent with the final hash result + * ipad in hmacctx->ipad and opad in hmacctx->opad location + */ + if (!hmacctx->desc) + return -EINVAL; + if (keylen > bs) { + err = crypto_shash_digest(hmacctx->desc, key, keylen, + hmacctx->ipad); + if (err) + goto out; + keylen = digestsize; + } else { + memcpy(hmacctx->ipad, key, keylen); + } + memset(hmacctx->ipad + keylen, 0, bs - keylen); + memcpy(hmacctx->opad, hmacctx->ipad, bs); + + for (i = 0; i < bs / sizeof(int); i++) { + *((unsigned int *)(&hmacctx->ipad) + i) ^= IPAD_DATA; + *((unsigned int *)(&hmacctx->opad) + i) ^= OPAD_DATA; + } + + updated_digestsize = digestsize; + if (digestsize == SHA224_DIGEST_SIZE) + updated_digestsize = SHA256_DIGEST_SIZE; + else if (digestsize == SHA384_DIGEST_SIZE) + updated_digestsize = SHA512_DIGEST_SIZE; + err = chcr_compute_partial_hash(hmacctx->desc, hmacctx->ipad, + hmacctx->ipad, digestsize); + if (err) + goto out; + chcr_change_order(hmacctx->ipad, updated_digestsize); + + err = chcr_compute_partial_hash(hmacctx->desc, hmacctx->opad, + hmacctx->opad, digestsize); + if (err) + goto out; + chcr_change_order(hmacctx->opad, updated_digestsize); +out: + return err; +} + +static int chcr_aes_xts_setkey(struct crypto_ablkcipher *tfm, const u8 *key, + unsigned int key_len) +{ + struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); + struct ablk_ctx *ablkctx = ABLK_CTX(ctx); + int status = 0; + unsigned short context_size = 0; + + if ((key_len == (AES_KEYSIZE_128 << 1)) || + (key_len == (AES_KEYSIZE_256 << 1))) { + memcpy(ablkctx->key, key, key_len); + ablkctx->enckey_len = key_len; + context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + key_len) >> 4; + ablkctx->key_ctx_hdr = + FILL_KEY_CTX_HDR((key_len == AES_KEYSIZE_256) ? + CHCR_KEYCTX_CIPHER_KEY_SIZE_128 : + CHCR_KEYCTX_CIPHER_KEY_SIZE_256, + CHCR_KEYCTX_NO_KEY, 1, + 0, context_size); + ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_XTS; + } else { + crypto_tfm_set_flags((struct crypto_tfm *)tfm, + CRYPTO_TFM_RES_BAD_KEY_LEN); + ablkctx->enckey_len = 0; + status = -EINVAL; + } + return status; +} + +static int chcr_sha_init(struct ahash_request *areq) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + int digestsize = crypto_ahash_digestsize(tfm); + + req_ctx->data_len = 0; + req_ctx->dummy_payload_ptr = NULL; + req_ctx->bfr_len = 0; + req_ctx->skb = NULL; + req_ctx->result = 0; + copy_hash_init_values(req_ctx->partial_hash, digestsize); + return 0; +} + +static int chcr_sha_cra_init(struct crypto_tfm *tfm) +{ + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct chcr_ahash_req_ctx)); + return chcr_device_init(crypto_tfm_ctx(tfm)); +} + +static int chcr_hmac_init(struct ahash_request *areq) +{ + struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); + struct crypto_ahash *rtfm = crypto_ahash_reqtfm(areq); + struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); + struct hmac_ctx *hmacctx = HMAC_CTX(ctx); + unsigned int digestsize = crypto_ahash_digestsize(rtfm); + unsigned int bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); + + chcr_sha_init(areq); + req_ctx->data_len = bs; + if (is_hmac(crypto_ahash_tfm(rtfm))) { + if (digestsize == SHA224_DIGEST_SIZE) + memcpy(req_ctx->partial_hash, hmacctx->ipad, + SHA256_DIGEST_SIZE); + else if (digestsize == SHA384_DIGEST_SIZE) + memcpy(req_ctx->partial_hash, hmacctx->ipad, + SHA512_DIGEST_SIZE); + else + memcpy(req_ctx->partial_hash, hmacctx->ipad, + digestsize); + } + return 0; +} + +static int chcr_hmac_cra_init(struct crypto_tfm *tfm) +{ + struct chcr_context *ctx = crypto_tfm_ctx(tfm); + struct hmac_ctx *hmacctx = HMAC_CTX(ctx); + unsigned int digestsize = + crypto_ahash_digestsize(__crypto_ahash_cast(tfm)); + + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct chcr_ahash_req_ctx)); + hmacctx->desc = chcr_alloc_shash(digestsize); + if (IS_ERR(hmacctx->desc)) + return PTR_ERR(hmacctx->desc); + return chcr_device_init(crypto_tfm_ctx(tfm)); +} + +static void chcr_free_shash(struct shash_desc *desc) +{ + crypto_free_shash(desc->tfm); + kfree(desc); +} + +static void chcr_hmac_cra_exit(struct crypto_tfm *tfm) +{ + struct chcr_context *ctx = crypto_tfm_ctx(tfm); + struct hmac_ctx *hmacctx = HMAC_CTX(ctx); + + if (hmacctx->desc) { + chcr_free_shash(hmacctx->desc); + hmacctx->desc = NULL; + } +} + +static struct chcr_alg_template driver_algs[] = { + /* AES-CBC */ + { + .type = CRYPTO_ALG_TYPE_ABLKCIPHER, + .is_registered = 0, + .alg.crypto = { + .cra_name = "cbc(aes)", + .cra_driver_name = "cbc(aes-chcr)", + .cra_priority = CHCR_CRA_PRIORITY, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | + CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct chcr_context) + + sizeof(struct ablk_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_ablkcipher_type, + .cra_module = THIS_MODULE, + .cra_init = chcr_cra_init, + .cra_exit = NULL, + .cra_u.ablkcipher = { + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .setkey = chcr_aes_cbc_setkey, + .encrypt = chcr_aes_encrypt, + .decrypt = chcr_aes_decrypt, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_ABLKCIPHER, + .is_registered = 0, + .alg.crypto = { + .cra_name = "xts(aes)", + .cra_driver_name = "xts(aes-chcr)", + .cra_priority = CHCR_CRA_PRIORITY, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | + CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct chcr_context) + + sizeof(struct ablk_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_ablkcipher_type, + .cra_module = THIS_MODULE, + .cra_init = chcr_cra_init, + .cra_exit = NULL, + .cra_u = { + .ablkcipher = { + .min_keysize = 2 * AES_MIN_KEY_SIZE, + .max_keysize = 2 * AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .setkey = chcr_aes_xts_setkey, + .encrypt = chcr_aes_encrypt, + .decrypt = chcr_aes_decrypt, + } + } + } + }, + /* SHA */ + { + .type = CRYPTO_ALG_TYPE_AHASH, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA1_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha1", + .cra_driver_name = "sha1-chcr", + .cra_blocksize = SHA1_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_AHASH, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA256_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha256", + .cra_driver_name = "sha256-chcr", + .cra_blocksize = SHA256_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_AHASH, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA224_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha224", + .cra_driver_name = "sha224-chcr", + .cra_blocksize = SHA224_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_AHASH, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA384_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha384", + .cra_driver_name = "sha384-chcr", + .cra_blocksize = SHA384_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_AHASH, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA512_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha512", + .cra_driver_name = "sha512-chcr", + .cra_blocksize = SHA512_BLOCK_SIZE, + } + } + }, + /* HMAC */ + { + .type = CRYPTO_ALG_TYPE_HMAC, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA1_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha1)", + .cra_driver_name = "hmac(sha1-chcr)", + .cra_blocksize = SHA1_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_HMAC, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA224_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha224)", + .cra_driver_name = "hmac(sha224-chcr)", + .cra_blocksize = SHA224_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_HMAC, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA256_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha256)", + .cra_driver_name = "hmac(sha256-chcr)", + .cra_blocksize = SHA256_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_HMAC, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA384_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha384)", + .cra_driver_name = "hmac(sha384-chcr)", + .cra_blocksize = SHA384_BLOCK_SIZE, + } + } + }, + { + .type = CRYPTO_ALG_TYPE_HMAC, + .is_registered = 0, + .alg.hash = { + .halg.digestsize = SHA512_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha512)", + .cra_driver_name = "hmac(sha512-chcr)", + .cra_blocksize = SHA512_BLOCK_SIZE, + } + } + }, +}; + +/* + * chcr_unregister_alg - Deregister crypto algorithms with + * kernel framework. + */ +static int chcr_unregister_alg(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { + switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) { + case CRYPTO_ALG_TYPE_ABLKCIPHER: + if (driver_algs[i].is_registered) + crypto_unregister_alg( + &driver_algs[i].alg.crypto); + break; + case CRYPTO_ALG_TYPE_AHASH: + if (driver_algs[i].is_registered) + crypto_unregister_ahash( + &driver_algs[i].alg.hash); + break; + } + driver_algs[i].is_registered = 0; + } + return 0; +} + +#define SZ_AHASH_CTX sizeof(struct chcr_context) +#define SZ_AHASH_H_CTX (sizeof(struct chcr_context) + sizeof(struct hmac_ctx)) +#define SZ_AHASH_REQ_CTX sizeof(struct chcr_ahash_req_ctx) +#define AHASH_CRA_FLAGS (CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC) + +/* + * chcr_register_alg - Register crypto algorithms with kernel framework. + */ +static int chcr_register_alg(void) +{ + struct crypto_alg ai; + struct ahash_alg *a_hash; + int err = 0, i; + char *name = NULL; + + for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { + if (driver_algs[i].is_registered) + continue; + switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) { + case CRYPTO_ALG_TYPE_ABLKCIPHER: + err = crypto_register_alg(&driver_algs[i].alg.crypto); + name = driver_algs[i].alg.crypto.cra_driver_name; + break; + case CRYPTO_ALG_TYPE_AHASH: + a_hash = &driver_algs[i].alg.hash; + a_hash->update = chcr_ahash_update; + a_hash->final = chcr_ahash_final; + a_hash->finup = chcr_ahash_finup; + a_hash->digest = chcr_ahash_digest; + a_hash->export = chcr_ahash_export; + a_hash->import = chcr_ahash_import; + a_hash->halg.statesize = SZ_AHASH_REQ_CTX; + a_hash->halg.base.cra_priority = CHCR_CRA_PRIORITY; + a_hash->halg.base.cra_module = THIS_MODULE; + a_hash->halg.base.cra_flags = AHASH_CRA_FLAGS; + a_hash->halg.base.cra_alignmask = 0; + a_hash->halg.base.cra_exit = NULL; + a_hash->halg.base.cra_type = &crypto_ahash_type; + + if (driver_algs[i].type == CRYPTO_ALG_TYPE_HMAC) { + a_hash->halg.base.cra_init = chcr_hmac_cra_init; + a_hash->halg.base.cra_exit = chcr_hmac_cra_exit; + a_hash->init = chcr_hmac_init; + a_hash->setkey = chcr_ahash_setkey; + a_hash->halg.base.cra_ctxsize = SZ_AHASH_H_CTX; + } else { + a_hash->init = chcr_sha_init; + a_hash->halg.base.cra_ctxsize = SZ_AHASH_CTX; + a_hash->halg.base.cra_init = chcr_sha_cra_init; + } + err = crypto_register_ahash(&driver_algs[i].alg.hash); + ai = driver_algs[i].alg.hash.halg.base; + name = ai.cra_driver_name; + break; + } + if (err) { + pr_err("chcr : %s : Algorithm registration failed\n", + name); + goto register_err; + } else { + driver_algs[i].is_registered = 1; + } + } + return 0; + +register_err: + chcr_unregister_alg(); + return err; +} + +/* + * start_crypto - Register the crypto algorithms. + * This should called once when the first device comesup. After this + * kernel will start calling driver APIs for crypto operations. + */ +int start_crypto(void) +{ + return chcr_register_alg(); +} + +/* + * stop_crypto - Deregister all the crypto algorithms with kernel. + * This should be called once when the last device goes down. After this + * kernel will not call the driver API for crypto operations. + */ +int stop_crypto(void) +{ + chcr_unregister_alg(); + return 0; +} |