From 549bd8bc598759607b5ffc2eb052a3c99a85552e Mon Sep 17 00:00:00 2001 From: LEROY Christophe Date: Mon, 6 Jun 2016 13:20:40 +0200 Subject: [PATCH] crypto: talitos - Implement AEAD for SEC1 using HMAC_SNOOP_NO_AFEU This patchs enhances the IPSEC_ESP related functions for them to also supports the same operations with descriptor type HMAC_SNOOP_NO_AFEU. The differences between the two descriptor types are: * pointeurs 2 and 3 are swaped (Confidentiality key and Primary EU Context IN) * HMAC_SNOOP_NO_AFEU has CICV out in pointer 6 * HMAC_SNOOP_NO_AFEU has no primary EU context out so we get it from the end of data out Signed-off-by: Christophe Leroy Signed-off-by: Herbert Xu --- drivers/crypto/talitos.c | 209 +++++++++++++++++++++++---------------- 1 file changed, 124 insertions(+), 85 deletions(-) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index b0d3c24f7f79..4ff03c3f62cd 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -940,7 +940,13 @@ static void ipsec_esp_unmap(struct device *dev, struct talitos_edesc *edesc, struct aead_request *areq) { - unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE); + struct crypto_aead *aead = crypto_aead_reqtfm(areq); + struct talitos_ctx *ctx = crypto_aead_ctx(aead); + unsigned int ivsize = crypto_aead_ivsize(aead); + + if (edesc->desc.hdr & DESC_HDR_TYPE_IPSEC_ESP) + unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], + DMA_FROM_DEVICE); unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE); unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE); @@ -951,6 +957,13 @@ static void ipsec_esp_unmap(struct device *dev, if (edesc->dma_len) dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, DMA_BIDIRECTIONAL); + + if (!(edesc->desc.hdr & DESC_HDR_TYPE_IPSEC_ESP)) { + unsigned int dst_nents = edesc->dst_nents ? : 1; + + sg_pcopy_to_buffer(areq->dst, dst_nents, ctx->iv, ivsize, + areq->assoclen + areq->cryptlen - ivsize); + } } /* @@ -960,6 +973,8 @@ static void ipsec_esp_encrypt_done(struct device *dev, struct talitos_desc *desc, void *context, int err) { + struct talitos_private *priv = dev_get_drvdata(dev); + bool is_sec1 = has_ftr_sec1(priv); struct aead_request *areq = context; struct crypto_aead *authenc = crypto_aead_reqtfm(areq); unsigned int authsize = crypto_aead_authsize(authenc); @@ -973,8 +988,11 @@ static void ipsec_esp_encrypt_done(struct device *dev, /* copy the generated ICV to dst */ if (edesc->icv_ool) { - icvdata = &edesc->link_tbl[edesc->src_nents + - edesc->dst_nents + 2]; + if (is_sec1) + icvdata = edesc->buf + areq->assoclen + areq->cryptlen; + else + icvdata = &edesc->link_tbl[edesc->src_nents + + edesc->dst_nents + 2]; sg = sg_last(areq->dst, edesc->dst_nents); memcpy((char *)sg_virt(sg) + sg->length - authsize, icvdata, authsize); @@ -995,6 +1013,8 @@ static void ipsec_esp_decrypt_swauth_done(struct device *dev, struct talitos_edesc *edesc; struct scatterlist *sg; char *oicv, *icv; + struct talitos_private *priv = dev_get_drvdata(dev); + bool is_sec1 = has_ftr_sec1(priv); edesc = container_of(desc, struct talitos_edesc, desc); @@ -1006,7 +1026,12 @@ static void ipsec_esp_decrypt_swauth_done(struct device *dev, icv = (char *)sg_virt(sg) + sg->length - authsize; if (edesc->dma_len) { - oicv = (char *)&edesc->link_tbl[edesc->src_nents + + if (is_sec1) + oicv = (char *)&edesc->dma_link_tbl + + req->assoclen + req->cryptlen; + else + oicv = (char *) + &edesc->link_tbl[edesc->src_nents + edesc->dst_nents + 2]; if (edesc->icv_ool) icv = oicv + authsize; @@ -1145,42 +1170,52 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq, int tbl_off = 0; int sg_count, ret; int sg_link_tbl_len; + bool sync_needed = false; + struct talitos_private *priv = dev_get_drvdata(dev); + bool is_sec1 = has_ftr_sec1(priv); /* hmac key */ map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key, DMA_TO_DEVICE); - sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ?: 1, - (areq->src == areq->dst) ? DMA_BIDIRECTIONAL - : DMA_TO_DEVICE); - /* hmac data */ - to_talitos_ptr_len(&desc->ptr[1], areq->assoclen, 0); - if (sg_count > 1 && - (ret = sg_to_link_tbl_offset(areq->src, sg_count, 0, - areq->assoclen, - &edesc->link_tbl[tbl_off])) > 1) { - to_talitos_ptr(&desc->ptr[1], edesc->dma_link_tbl + tbl_off * - sizeof(struct talitos_ptr), 0); - to_talitos_ptr_ext_set(&desc->ptr[1], DESC_PTR_LNKTBL_JUMP, 0); + sg_count = edesc->src_nents ?: 1; + if (is_sec1 && sg_count > 1) + sg_copy_to_buffer(areq->src, sg_count, edesc->buf, + areq->assoclen + cryptlen); + else + sg_count = dma_map_sg(dev, areq->src, sg_count, + (areq->src == areq->dst) ? + DMA_BIDIRECTIONAL : DMA_TO_DEVICE); - dma_sync_single_for_device(dev, edesc->dma_link_tbl, - edesc->dma_len, DMA_BIDIRECTIONAL); + /* hmac data */ + ret = talitos_sg_map(dev, areq->src, areq->assoclen, edesc, + &desc->ptr[1], sg_count, 0, tbl_off); + if (ret > 1) { tbl_off += ret; - } else { - to_talitos_ptr(&desc->ptr[1], sg_dma_address(areq->src), 0); - to_talitos_ptr_ext_set(&desc->ptr[1], 0, 0); + sync_needed = true; } /* cipher iv */ - to_talitos_ptr(&desc->ptr[2], edesc->iv_dma, 0); - to_talitos_ptr_len(&desc->ptr[2], ivsize, 0); - to_talitos_ptr_ext_set(&desc->ptr[2], 0, 0); + if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) { + to_talitos_ptr(&desc->ptr[2], edesc->iv_dma, is_sec1); + to_talitos_ptr_len(&desc->ptr[2], ivsize, is_sec1); + to_talitos_ptr_ext_set(&desc->ptr[2], 0, is_sec1); + } else { + to_talitos_ptr(&desc->ptr[3], edesc->iv_dma, is_sec1); + to_talitos_ptr_len(&desc->ptr[3], ivsize, is_sec1); + to_talitos_ptr_ext_set(&desc->ptr[3], 0, is_sec1); + } /* cipher key */ - map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, - (char *)&ctx->key + ctx->authkeylen, - DMA_TO_DEVICE); + if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) + map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, + (char *)&ctx->key + ctx->authkeylen, + DMA_TO_DEVICE); + else + map_single_talitos_ptr(dev, &desc->ptr[2], ctx->enckeylen, + (char *)&ctx->key + ctx->authkeylen, + DMA_TO_DEVICE); /* * cipher in @@ -1188,78 +1223,82 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq, * extent is bytes of HMAC postpended to ciphertext, * typically 12 for ipsec */ - to_talitos_ptr_len(&desc->ptr[4], cryptlen, 0); - to_talitos_ptr_ext_set(&desc->ptr[4], authsize, 0); + to_talitos_ptr_len(&desc->ptr[4], cryptlen, is_sec1); + to_talitos_ptr_ext_set(&desc->ptr[4], 0, is_sec1); sg_link_tbl_len = cryptlen; - if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) - sg_link_tbl_len += authsize; - if (sg_count == 1) { - to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src) + - areq->assoclen, 0); - } else if ((ret = sg_to_link_tbl_offset(areq->src, sg_count, - areq->assoclen, sg_link_tbl_len, - &edesc->link_tbl[tbl_off])) > - 1) { - to_talitos_ptr_ext_or(&desc->ptr[4], DESC_PTR_LNKTBL_JUMP, 0); - to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl + - tbl_off * - sizeof(struct talitos_ptr), 0); - dma_sync_single_for_device(dev, edesc->dma_link_tbl, - edesc->dma_len, - DMA_BIDIRECTIONAL); - tbl_off += ret; - } else { - copy_talitos_ptr(&desc->ptr[4], &edesc->link_tbl[tbl_off], 0); + if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) { + to_talitos_ptr_ext_set(&desc->ptr[4], authsize, is_sec1); + + if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) + sg_link_tbl_len += authsize; } - /* cipher out */ - to_talitos_ptr_len(&desc->ptr[5], cryptlen, 0); - to_talitos_ptr_ext_set(&desc->ptr[5], authsize, 0); + sg_count = talitos_sg_map(dev, areq->src, cryptlen, edesc, + &desc->ptr[4], sg_count, areq->assoclen, + tbl_off); + + if (sg_count > 1) { + tbl_off += sg_count; + sync_needed = true; + } - if (areq->src != areq->dst) - sg_count = dma_map_sg(dev, areq->dst, edesc->dst_nents ? : 1, - DMA_FROM_DEVICE); + /* cipher out */ + if (areq->src != areq->dst) { + sg_count = edesc->dst_nents ? : 1; + if (!is_sec1 || sg_count == 1) + dma_map_sg(dev, areq->dst, sg_count, DMA_FROM_DEVICE); + } - edesc->icv_ool = false; + sg_count = talitos_sg_map(dev, areq->dst, cryptlen, edesc, + &desc->ptr[5], sg_count, areq->assoclen, + tbl_off); - if (sg_count == 1) { - to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst) + - areq->assoclen, 0); - } else if ((sg_count = - sg_to_link_tbl_offset(areq->dst, sg_count, - areq->assoclen, cryptlen, - &edesc->link_tbl[tbl_off])) > 1) { - struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off]; - - to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl + - tbl_off * sizeof(struct talitos_ptr), 0); - - /* Add an entry to the link table for ICV data */ - tbl_ptr += sg_count - 1; - to_talitos_ptr_ext_set(tbl_ptr, 0, 0); - tbl_ptr++; - to_talitos_ptr_ext_set(tbl_ptr, DESC_PTR_LNKTBL_RETURN, 0); - to_talitos_ptr_len(tbl_ptr, authsize, 0); - - /* icv data follows link tables */ - to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl + - (edesc->src_nents + edesc->dst_nents + - 2) * sizeof(struct talitos_ptr) + - authsize, 0); - to_talitos_ptr_ext_or(&desc->ptr[5], DESC_PTR_LNKTBL_JUMP, 0); - dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, - edesc->dma_len, DMA_BIDIRECTIONAL); + if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) + to_talitos_ptr_ext_or(&desc->ptr[5], authsize, is_sec1); + if (sg_count > 1) { edesc->icv_ool = true; + sync_needed = true; + + if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) { + struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off]; + int offset = (edesc->src_nents + edesc->dst_nents + 2) * + sizeof(struct talitos_ptr) + authsize; + + /* Add an entry to the link table for ICV data */ + tbl_ptr += sg_count - 1; + to_talitos_ptr_ext_set(tbl_ptr, 0, is_sec1); + tbl_ptr++; + to_talitos_ptr_ext_set(tbl_ptr, DESC_PTR_LNKTBL_RETURN, + is_sec1); + to_talitos_ptr_len(tbl_ptr, authsize, is_sec1); + + /* icv data follows link tables */ + to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl + offset, + is_sec1); + } } else { - copy_talitos_ptr(&desc->ptr[5], &edesc->link_tbl[tbl_off], 0); + edesc->icv_ool = false; + } + + /* ICV data */ + if (!(desc->hdr & DESC_HDR_TYPE_IPSEC_ESP)) { + to_talitos_ptr_len(&desc->ptr[6], authsize, is_sec1); + to_talitos_ptr(&desc->ptr[6], edesc->dma_link_tbl + + areq->assoclen + cryptlen, is_sec1); } /* iv out */ - map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, - DMA_FROM_DEVICE); + if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) + map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, + DMA_FROM_DEVICE); + + if (sync_needed) + dma_sync_single_for_device(dev, edesc->dma_link_tbl, + edesc->dma_len, + DMA_BIDIRECTIONAL); ret = talitos_submit(dev, ctx->ch, desc, callback, areq); if (ret != -EINPROGRESS) { -- 2.30.2