[PATCH v2 06/17] crypto: talitos - Add talitos2.c to isolate SEC2 specific functions
From: Christophe Leroy
Date: Fri Mar 06 2015 - 11:39:37 EST
SEC1 doesn't have IPSec descriptor, so all functions using that descriptor
are specific to SEC2. This patch moves them in a new talitos2.c file
dedicated to SEC2
We also move to talitos2.c all the functions that will be different for
SEC1, like the handling of mapping/unmapping of input/output scatterlists
We move to talitos.h some of the helpers that are used by both talitos.c
and talitos2.c
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
drivers/crypto/Kconfig | 4 +
drivers/crypto/Makefile | 1 +
drivers/crypto/talitos.c | 666 +---------------------------------------------
drivers/crypto/talitos.h | 133 +++++++++
drivers/crypto/talitos2.c | 614 ++++++++++++++++++++++++++++++++++++++++++
5 files changed, 758 insertions(+), 660 deletions(-)
create mode 100644 drivers/crypto/talitos2.c
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 2fb0fdf..4fd6d7e 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -211,6 +211,7 @@ config CRYPTO_DEV_TALITOS
select CRYPTO_ALGAPI
select CRYPTO_AUTHENC
select HW_RANDOM
+ select CRYPTO_DEV_TALITOS2
depends on FSL_SOC
help
Say 'Y' here to use the Freescale Security Engine (SEC)
@@ -222,6 +223,9 @@ config CRYPTO_DEV_TALITOS
To compile this driver as a module, choose M here: the module
will be called talitos.
+config CRYPTO_DEV_TALITOS2
+ bool
+
config CRYPTO_DEV_IXP4XX
tristate "Driver for IXP4xx crypto hardware acceleration"
depends on ARCH_IXP4XX && IXP4XX_QMGR && IXP4XX_NPE
diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile
index 3924f93..f26159f 100644
--- a/drivers/crypto/Makefile
+++ b/drivers/crypto/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_CRYPTO_DEV_PPC4XX) += amcc/
obj-$(CONFIG_CRYPTO_DEV_S5P) += s5p-sss.o
obj-$(CONFIG_CRYPTO_DEV_SAHARA) += sahara.o
obj-$(CONFIG_CRYPTO_DEV_TALITOS) += talitos.o
+obj-$(CONFIG_CRYPTO_DEV_TALITOS2) += talitos2.o
obj-$(CONFIG_CRYPTO_DEV_UX500) += ux500/
obj-$(CONFIG_CRYPTO_DEV_QAT) += qat/
obj-$(CONFIG_CRYPTO_DEV_QCE) += qce/
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 76e636b..114c5e5 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -55,39 +55,6 @@
#include "talitos.h"
-static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr)
-{
- talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
- talitos_ptr->eptr = upper_32_bits(dma_addr);
-}
-
-/*
- * map virtual single (contiguous) pointer to h/w descriptor pointer
- */
-static void map_single_talitos_ptr(struct device *dev,
- struct talitos_ptr *talitos_ptr,
- unsigned short len, void *data,
- unsigned char extent,
- enum dma_data_direction dir)
-{
- dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
-
- talitos_ptr->len = cpu_to_be16(len);
- to_talitos_ptr(talitos_ptr, dma_addr);
- talitos_ptr->j_extent = extent;
-}
-
-/*
- * unmap bus single (contiguous) h/w descriptor pointer
- */
-static void unmap_single_talitos_ptr(struct device *dev,
- struct talitos_ptr *talitos_ptr,
- enum dma_data_direction dir)
-{
- dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
- be16_to_cpu(talitos_ptr->len), dir);
-}
-
static unsigned int do_reset_channel(struct talitos_private *priv, int ch)
{
unsigned int timeout = TALITOS_TIMEOUT;
@@ -646,20 +613,6 @@ static void talitos_unregister_rng(struct device *dev)
* crypto alg
*/
#define TALITOS_CRA_PRIORITY 3000
-#define TALITOS_MAX_KEY_SIZE 96
-#define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
-
-struct talitos_ctx {
- struct device *dev;
- int ch;
- __be32 desc_hdr_template;
- u8 key[TALITOS_MAX_KEY_SIZE];
- u8 iv[TALITOS_MAX_IV_LENGTH];
- unsigned int keylen;
- unsigned int enckeylen;
- unsigned int authkeylen;
- unsigned int authsize;
-};
#define HASH_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
#define TALITOS_MDEU_MAX_CONTEXT_SIZE TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512
@@ -678,426 +631,6 @@ struct talitos_ahash_req_ctx {
struct scatterlist *psrc;
};
-static int aead_setauthsize(struct crypto_aead *authenc,
- unsigned int authsize)
-{
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
-
- ctx->authsize = authsize;
-
- return 0;
-}
-
-static int aead_setkey(struct crypto_aead *authenc,
- const u8 *key, unsigned int keylen)
-{
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- struct crypto_authenc_keys keys;
-
- if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
- goto badkey;
-
- if (keys.authkeylen + keys.enckeylen > TALITOS_MAX_KEY_SIZE)
- goto badkey;
-
- memcpy(ctx->key, keys.authkey, keys.authkeylen);
- memcpy(&ctx->key[keys.authkeylen], keys.enckey, keys.enckeylen);
-
- ctx->keylen = keys.authkeylen + keys.enckeylen;
- ctx->enckeylen = keys.enckeylen;
- ctx->authkeylen = keys.authkeylen;
-
- return 0;
-
-badkey:
- crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
- return -EINVAL;
-}
-
-/*
- * talitos_edesc - s/w-extended descriptor
- * @assoc_nents: number of segments in associated data scatterlist
- * @src_nents: number of segments in input scatterlist
- * @dst_nents: number of segments in output scatterlist
- * @assoc_chained: whether assoc is chained or not
- * @src_chained: whether src is chained or not
- * @dst_chained: whether dst is chained or not
- * @iv_dma: dma address of iv for checking continuity and link table
- * @dma_len: length of dma mapped link_tbl space
- * @dma_link_tbl: bus physical address of link_tbl
- * @desc: h/w descriptor
- * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
- *
- * if decrypting (with authcheck), or either one of src_nents or dst_nents
- * is greater than 1, an integrity check value is concatenated to the end
- * of link_tbl data
- */
-struct talitos_edesc {
- int assoc_nents;
- int src_nents;
- int dst_nents;
- bool assoc_chained;
- bool src_chained;
- bool dst_chained;
- dma_addr_t iv_dma;
- int dma_len;
- dma_addr_t dma_link_tbl;
- struct talitos_desc desc;
- struct talitos_ptr link_tbl[0];
-};
-
-static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
- unsigned int nents, enum dma_data_direction dir,
- bool chained)
-{
- if (unlikely(chained))
- while (sg) {
- dma_map_sg(dev, sg, 1, dir);
- sg = sg_next(sg);
- }
- else
- dma_map_sg(dev, sg, nents, dir);
- return nents;
-}
-
-static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
- enum dma_data_direction dir)
-{
- while (sg) {
- dma_unmap_sg(dev, sg, 1, dir);
- sg = sg_next(sg);
- }
-}
-
-static void talitos_sg_unmap(struct device *dev,
- struct talitos_edesc *edesc,
- struct scatterlist *src,
- struct scatterlist *dst)
-{
- unsigned int src_nents = edesc->src_nents ? : 1;
- unsigned int dst_nents = edesc->dst_nents ? : 1;
-
- if (src != dst) {
- if (edesc->src_chained)
- talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
- else
- dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
-
- if (dst) {
- if (edesc->dst_chained)
- talitos_unmap_sg_chain(dev, dst,
- DMA_FROM_DEVICE);
- else
- dma_unmap_sg(dev, dst, dst_nents,
- DMA_FROM_DEVICE);
- }
- } else
- if (edesc->src_chained)
- talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
- else
- dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
-}
-
-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);
- 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);
-
- if (edesc->assoc_chained)
- talitos_unmap_sg_chain(dev, areq->assoc, DMA_TO_DEVICE);
- else if (areq->assoclen)
- /* assoc_nents counts also for IV in non-contiguous cases */
- dma_unmap_sg(dev, areq->assoc,
- edesc->assoc_nents ? edesc->assoc_nents - 1 : 1,
- DMA_TO_DEVICE);
-
- talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
-
- if (edesc->dma_len)
- dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
- DMA_BIDIRECTIONAL);
-}
-
-/*
- * ipsec_esp descriptor callbacks
- */
-static void ipsec_esp_encrypt_done(struct device *dev,
- struct talitos_desc *desc, void *context,
- int err)
-{
- struct aead_request *areq = context;
- struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- struct talitos_edesc *edesc;
- struct scatterlist *sg;
- void *icvdata;
-
- edesc = container_of(desc, struct talitos_edesc, desc);
-
- ipsec_esp_unmap(dev, edesc, areq);
-
- /* copy the generated ICV to dst */
- if (edesc->dst_nents) {
- icvdata = &edesc->link_tbl[edesc->src_nents +
- edesc->dst_nents + 2 +
- edesc->assoc_nents];
- sg = sg_last(areq->dst, edesc->dst_nents);
- memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
- icvdata, ctx->authsize);
- }
-
- kfree(edesc);
-
- aead_request_complete(areq, err);
-}
-
-static void ipsec_esp_decrypt_swauth_done(struct device *dev,
- struct talitos_desc *desc,
- void *context, int err)
-{
- struct aead_request *req = context;
- struct crypto_aead *authenc = crypto_aead_reqtfm(req);
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- struct talitos_edesc *edesc;
- struct scatterlist *sg;
- void *icvdata;
-
- edesc = container_of(desc, struct talitos_edesc, desc);
-
- ipsec_esp_unmap(dev, edesc, req);
-
- if (!err) {
- /* auth check */
- if (edesc->dma_len)
- icvdata = &edesc->link_tbl[edesc->src_nents +
- edesc->dst_nents + 2 +
- edesc->assoc_nents];
- else
- icvdata = &edesc->link_tbl[0];
-
- sg = sg_last(req->dst, edesc->dst_nents ? : 1);
- err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
- ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
- }
-
- kfree(edesc);
-
- aead_request_complete(req, err);
-}
-
-static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
- struct talitos_desc *desc,
- void *context, int err)
-{
- struct aead_request *req = context;
- struct talitos_edesc *edesc;
-
- edesc = container_of(desc, struct talitos_edesc, desc);
-
- ipsec_esp_unmap(dev, edesc, req);
-
- /* check ICV auth status */
- if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
- DESC_HDR_LO_ICCR1_PASS))
- err = -EBADMSG;
-
- kfree(edesc);
-
- aead_request_complete(req, err);
-}
-
-/*
- * convert scatterlist to SEC h/w link table format
- * stop at cryptlen bytes
- */
-static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
- int cryptlen, struct talitos_ptr *link_tbl_ptr)
-{
- int n_sg = sg_count;
-
- while (n_sg--) {
- to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
- link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
- link_tbl_ptr->j_extent = 0;
- link_tbl_ptr++;
- cryptlen -= sg_dma_len(sg);
- sg = sg_next(sg);
- }
-
- /* adjust (decrease) last one (or two) entry's len to cryptlen */
- link_tbl_ptr--;
- while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
- /* Empty this entry, and move to previous one */
- cryptlen += be16_to_cpu(link_tbl_ptr->len);
- link_tbl_ptr->len = 0;
- sg_count--;
- link_tbl_ptr--;
- }
- be16_add_cpu(&link_tbl_ptr->len, cryptlen);
-
- /* tag end of link table */
- link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
-
- return sg_count;
-}
-
-/*
- * fill in and submit ipsec_esp descriptor
- */
-static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
- u64 seq, void (*callback) (struct device *dev,
- struct talitos_desc *desc,
- void *context, int error))
-{
- struct crypto_aead *aead = crypto_aead_reqtfm(areq);
- struct talitos_ctx *ctx = crypto_aead_ctx(aead);
- struct device *dev = ctx->dev;
- struct talitos_desc *desc = &edesc->desc;
- unsigned int cryptlen = areq->cryptlen;
- unsigned int authsize = ctx->authsize;
- unsigned int ivsize = crypto_aead_ivsize(aead);
- int sg_count, ret;
- int sg_link_tbl_len;
-
- /* hmac key */
- map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
- 0, DMA_TO_DEVICE);
-
- /* hmac data */
- desc->ptr[1].len = cpu_to_be16(areq->assoclen + ivsize);
- if (edesc->assoc_nents) {
- int tbl_off = edesc->src_nents + edesc->dst_nents + 2;
- struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
-
- to_talitos_ptr(&desc->ptr[1], edesc->dma_link_tbl + tbl_off *
- sizeof(struct talitos_ptr));
- desc->ptr[1].j_extent = DESC_PTR_LNKTBL_JUMP;
-
- /* assoc_nents - 1 entries for assoc, 1 for IV */
- sg_count = sg_to_link_tbl(areq->assoc, edesc->assoc_nents - 1,
- areq->assoclen, tbl_ptr);
-
- /* add IV to link table */
- tbl_ptr += sg_count - 1;
- tbl_ptr->j_extent = 0;
- tbl_ptr++;
- to_talitos_ptr(tbl_ptr, edesc->iv_dma);
- tbl_ptr->len = cpu_to_be16(ivsize);
- tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
-
- dma_sync_single_for_device(dev, edesc->dma_link_tbl,
- edesc->dma_len, DMA_BIDIRECTIONAL);
- } else {
- if (areq->assoclen)
- to_talitos_ptr(&desc->ptr[1],
- sg_dma_address(areq->assoc));
- else
- to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
- desc->ptr[1].j_extent = 0;
- }
-
- /* cipher iv */
- to_talitos_ptr(&desc->ptr[2], edesc->iv_dma);
- desc->ptr[2].len = cpu_to_be16(ivsize);
- desc->ptr[2].j_extent = 0;
- /* Sync needed for the aead_givencrypt case */
- dma_sync_single_for_device(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE);
-
- /* cipher key */
- map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
- (char *)&ctx->key + ctx->authkeylen, 0,
- DMA_TO_DEVICE);
-
- /*
- * cipher in
- * map and adjust cipher len to aead request cryptlen.
- * extent is bytes of HMAC postpended to ciphertext,
- * typically 12 for ipsec
- */
- desc->ptr[4].len = cpu_to_be16(cryptlen);
- desc->ptr[4].j_extent = authsize;
-
- sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
- (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
- : DMA_TO_DEVICE,
- edesc->src_chained);
-
- if (sg_count == 1) {
- to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
- } else {
- sg_link_tbl_len = cryptlen;
-
- if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
- sg_link_tbl_len = cryptlen + authsize;
-
- sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
- &edesc->link_tbl[0]);
- if (sg_count > 1) {
- desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
- to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
- dma_sync_single_for_device(dev, edesc->dma_link_tbl,
- edesc->dma_len,
- DMA_BIDIRECTIONAL);
- } else {
- /* Only one segment now, so no link tbl needed */
- to_talitos_ptr(&desc->ptr[4],
- sg_dma_address(areq->src));
- }
- }
-
- /* cipher out */
- desc->ptr[5].len = cpu_to_be16(cryptlen);
- desc->ptr[5].j_extent = authsize;
-
- if (areq->src != areq->dst)
- sg_count = talitos_map_sg(dev, areq->dst,
- edesc->dst_nents ? : 1,
- DMA_FROM_DEVICE, edesc->dst_chained);
-
- if (sg_count == 1) {
- to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
- } else {
- int tbl_off = edesc->src_nents + 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));
- sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
- tbl_ptr);
-
- /* Add an entry to the link table for ICV data */
- tbl_ptr += sg_count - 1;
- tbl_ptr->j_extent = 0;
- tbl_ptr++;
- tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
- tbl_ptr->len = cpu_to_be16(authsize);
-
- /* icv data follows link tables */
- to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl +
- (tbl_off + edesc->dst_nents + 1 +
- edesc->assoc_nents) *
- sizeof(struct talitos_ptr));
- desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
- dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
- edesc->dma_len, DMA_BIDIRECTIONAL);
- }
-
- /* iv out */
- map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
- DMA_FROM_DEVICE);
-
- ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
- if (ret != -EINPROGRESS) {
- ipsec_esp_unmap(dev, edesc, areq);
- kfree(edesc);
- }
- return ret;
-}
-
/*
* derive number of elements in scatterlist
*/
@@ -1121,7 +654,7 @@ static int sg_count(struct scatterlist *sg_list, int nbytes, bool *chained)
/*
* allocate and map the extended descriptor
*/
-static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
+struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
struct scatterlist *assoc,
struct scatterlist *src,
struct scatterlist *dst,
@@ -1225,109 +758,6 @@ static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
return edesc;
}
-static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 *iv,
- int icv_stashing, bool encrypt)
-{
- struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- unsigned int ivsize = crypto_aead_ivsize(authenc);
-
- return talitos_edesc_alloc(ctx->dev, areq->assoc, areq->src, areq->dst,
- iv, areq->assoclen, areq->cryptlen,
- ctx->authsize, ivsize, icv_stashing,
- areq->base.flags, encrypt);
-}
-
-static int aead_encrypt(struct aead_request *req)
-{
- struct crypto_aead *authenc = crypto_aead_reqtfm(req);
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- struct talitos_edesc *edesc;
-
- /* allocate extended descriptor */
- edesc = aead_edesc_alloc(req, req->iv, 0, true);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- /* set encrypt */
- edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
-
- return ipsec_esp(edesc, req, 0, ipsec_esp_encrypt_done);
-}
-
-static int aead_decrypt(struct aead_request *req)
-{
- struct crypto_aead *authenc = crypto_aead_reqtfm(req);
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- unsigned int authsize = ctx->authsize;
- struct talitos_private *priv = dev_get_drvdata(ctx->dev);
- struct talitos_edesc *edesc;
- struct scatterlist *sg;
- void *icvdata;
-
- req->cryptlen -= authsize;
-
- /* allocate extended descriptor */
- edesc = aead_edesc_alloc(req, req->iv, 1, false);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
- ((!edesc->src_nents && !edesc->dst_nents) ||
- priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
-
- /* decrypt and check the ICV */
- edesc->desc.hdr = ctx->desc_hdr_template |
- DESC_HDR_DIR_INBOUND |
- DESC_HDR_MODE1_MDEU_CICV;
-
- /* reset integrity check result bits */
- edesc->desc.hdr_lo = 0;
-
- return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_hwauth_done);
- }
-
- /* Have to check the ICV with software */
- edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
-
- /* stash incoming ICV for later cmp with ICV generated by the h/w */
- if (edesc->dma_len)
- icvdata = &edesc->link_tbl[edesc->src_nents +
- edesc->dst_nents + 2 +
- edesc->assoc_nents];
- else
- icvdata = &edesc->link_tbl[0];
-
- sg = sg_last(req->src, edesc->src_nents ? : 1);
-
- memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
- ctx->authsize);
-
- return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_swauth_done);
-}
-
-static int aead_givencrypt(struct aead_givcrypt_request *req)
-{
- struct aead_request *areq = &req->areq;
- struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
- struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
- struct talitos_edesc *edesc;
-
- /* allocate extended descriptor */
- edesc = aead_edesc_alloc(areq, req->giv, 0, true);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- /* set encrypt */
- edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
-
- memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
- /* avoid consecutive packets going out with same IV */
- *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
-
- return ipsec_esp(edesc, areq, req->seq, ipsec_esp_encrypt_done);
-}
-
static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
const u8 *key, unsigned int keylen)
{
@@ -1339,15 +769,6 @@ static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
return 0;
}
-static void unmap_sg_talitos_ptr(struct device *dev, struct scatterlist *src,
- struct scatterlist *dst, unsigned int len,
- struct talitos_edesc *edesc,
- struct talitos_ptr *ptr_in,
- struct talitos_ptr *ptr_out)
-{
- talitos_sg_unmap(dev, edesc, src, dst);
-}
-
static void common_nonsnoop_unmap(struct device *dev,
struct talitos_edesc *edesc,
struct ablkcipher_request *areq)
@@ -1380,65 +801,6 @@ static void ablkcipher_done(struct device *dev,
areq->base.complete(&areq->base, err);
}
-int map_sg_in_talitos_ptr(struct device *dev, struct scatterlist *src,
- unsigned int len, struct talitos_edesc *edesc,
- enum dma_data_direction dir, struct talitos_ptr *ptr)
-{
- int sg_count;
-
- ptr->len = cpu_to_be16(len);
- ptr->j_extent = 0;
-
- sg_count = talitos_map_sg(dev, src, edesc->src_nents ? : 1, dir,
- edesc->src_chained);
-
- if (sg_count == 1) {
- to_talitos_ptr(ptr, sg_dma_address(src));
- } else {
- sg_count = sg_to_link_tbl(src, sg_count, len,
- &edesc->link_tbl[0]);
- if (sg_count > 1) {
- to_talitos_ptr(ptr, edesc->dma_link_tbl);
- ptr->j_extent |= DESC_PTR_LNKTBL_JUMP;
- dma_sync_single_for_device(dev, edesc->dma_link_tbl,
- edesc->dma_len,
- DMA_BIDIRECTIONAL);
- } else {
- /* Only one segment now, so no link tbl needed */
- to_talitos_ptr(ptr, sg_dma_address(src));
- }
- }
- return sg_count;
-}
-
-void map_sg_out_talitos_ptr(struct device *dev, struct scatterlist *dst,
- unsigned int len, struct talitos_edesc *edesc,
- enum dma_data_direction dir,
- struct talitos_ptr *ptr, int sg_count)
-{
- ptr->len = cpu_to_be16(len);
- ptr->j_extent = 0;
-
- if (dir != DMA_NONE)
- sg_count = talitos_map_sg(dev, dst, edesc->dst_nents ? : 1,
- dir, edesc->dst_chained);
-
- if (sg_count == 1) {
- to_talitos_ptr(ptr, sg_dma_address(dst));
- } else {
- struct talitos_ptr *link_tbl_ptr =
- &edesc->link_tbl[edesc->src_nents + 1];
-
- to_talitos_ptr(ptr, edesc->dma_link_tbl +
- (edesc->src_nents + 1) *
- sizeof(struct talitos_ptr));
- ptr->j_extent |= DESC_PTR_LNKTBL_JUMP;
- sg_count = sg_to_link_tbl(dst, sg_count, len, link_tbl_ptr);
- dma_sync_single_for_device(dev, edesc->dma_link_tbl,
- edesc->dma_len, DMA_BIDIRECTIONAL);
- }
-}
-
static int common_nonsnoop(struct talitos_edesc *edesc,
struct ablkcipher_request *areq,
void (*callback) (struct device *dev,
@@ -2399,7 +1761,7 @@ struct talitos_crypto_alg {
struct talitos_alg_template algt;
};
-static int talitos_cra_init(struct crypto_tfm *tfm)
+int talitos_cra_init(struct crypto_tfm *tfm)
{
struct crypto_alg *alg = tfm->__crt_alg;
struct talitos_crypto_alg *talitos_alg;
@@ -2431,18 +1793,6 @@ static int talitos_cra_init(struct crypto_tfm *tfm)
return 0;
}
-static int talitos_cra_init_aead(struct crypto_tfm *tfm)
-{
- struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
-
- talitos_cra_init(tfm);
-
- /* random first IV */
- get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
-
- return 0;
-}
-
static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
{
struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
@@ -2537,6 +1887,7 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
t_alg->algt = *template;
switch (t_alg->algt.type) {
+ int ret;
case CRYPTO_ALG_TYPE_ABLKCIPHER:
alg = &t_alg->algt.alg.crypto;
alg->cra_init = talitos_cra_init;
@@ -2548,14 +1899,9 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
break;
case CRYPTO_ALG_TYPE_AEAD:
alg = &t_alg->algt.alg.crypto;
- alg->cra_init = talitos_cra_init_aead;
- alg->cra_type = &crypto_aead_type;
- alg->cra_aead.setkey = aead_setkey;
- alg->cra_aead.setauthsize = aead_setauthsize;
- alg->cra_aead.encrypt = aead_encrypt;
- alg->cra_aead.decrypt = aead_decrypt;
- alg->cra_aead.givencrypt = aead_givencrypt;
- alg->cra_aead.geniv = "<built-in>";
+ ret = talitos_alg_alloc_aead(alg);
+ if (ret)
+ return ERR_PTR(ret);
break;
case CRYPTO_ALG_TYPE_AHASH:
alg = &t_alg->algt.alg.hash.halg.base;
diff --git a/drivers/crypto/talitos.h b/drivers/crypto/talitos.h
index 102dc99..566dc92 100644
--- a/drivers/crypto/talitos.h
+++ b/drivers/crypto/talitos.h
@@ -133,11 +133,144 @@ struct talitos_private {
struct hwrng rng;
};
+/*
+ * talitos_edesc - s/w-extended descriptor
+ * @assoc_nents: number of segments in associated data scatterlist
+ * @src_nents: number of segments in input scatterlist
+ * @dst_nents: number of segments in output scatterlist
+ * @assoc_chained: whether assoc is chained or not
+ * @src_chained: whether src is chained or not
+ * @dst_chained: whether dst is chained or not
+ * @iv_dma: dma address of iv for checking continuity and link table
+ * @dma_len: length of dma mapped link_tbl space
+ * @dma_link_tbl: bus physical address of link_tbl
+ * @desc: h/w descriptor
+ * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
+ *
+ * if decrypting (with authcheck), or either one of src_nents or dst_nents
+ * is greater than 1, an integrity check value is concatenated to the end
+ * of link_tbl data
+ */
+struct talitos_edesc {
+ int assoc_nents;
+ int src_nents;
+ int dst_nents;
+ bool assoc_chained;
+ bool src_chained;
+ bool dst_chained;
+ dma_addr_t iv_dma;
+ int dma_len;
+ dma_addr_t dma_link_tbl;
+ struct talitos_desc desc;
+ struct talitos_ptr link_tbl[0];
+};
+
+#define TALITOS_MAX_KEY_SIZE 96
+/* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
+#define TALITOS_MAX_IV_LENGTH 16
+
+struct talitos_ctx {
+ struct device *dev;
+ int ch;
+ __be32 desc_hdr_template;
+ u8 key[TALITOS_MAX_KEY_SIZE];
+ u8 iv[TALITOS_MAX_IV_LENGTH];
+ unsigned int keylen;
+ unsigned int enckeylen;
+ unsigned int authkeylen;
+ unsigned int authsize;
+};
+
+static inline void to_talitos_ptr(struct talitos_ptr *ptr, dma_addr_t dma_addr)
+{
+ ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
+ ptr->eptr = upper_32_bits(dma_addr);
+}
+
+/*
+ * map virtual single (contiguous) pointer to h/w descriptor pointer
+ */
+static inline void map_single_talitos_ptr(struct device *dev,
+ struct talitos_ptr *talitos_ptr,
+ unsigned short len, void *data,
+ unsigned char extent,
+ enum dma_data_direction dir)
+{
+ dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
+
+ talitos_ptr->len = cpu_to_be16(len);
+ to_talitos_ptr(talitos_ptr, dma_addr);
+ talitos_ptr->j_extent = extent;
+}
+
+/*
+ * unmap bus single (contiguous) h/w descriptor pointer
+ */
+static inline void unmap_single_talitos_ptr(struct device *dev,
+ struct talitos_ptr *talitos_ptr,
+ enum dma_data_direction dir)
+{
+ dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
+ be16_to_cpu(talitos_ptr->len), dir);
+}
+
+static inline int talitos_map_sg(struct device *dev, struct scatterlist *sg,
+ unsigned int nents, enum dma_data_direction dir,
+ bool chained)
+{
+ if (unlikely(chained))
+ while (sg) {
+ dma_map_sg(dev, sg, 1, dir);
+ sg = sg_next(sg);
+ }
+ else
+ dma_map_sg(dev, sg, nents, dir);
+ return nents;
+}
+
+static inline void talitos_unmap_sg_chain(struct device *dev,
+ struct scatterlist *sg,
+ enum dma_data_direction dir)
+{
+ while (sg) {
+ dma_unmap_sg(dev, sg, 1, dir);
+ sg = sg_next(sg);
+ }
+}
+
+extern void unmap_sg_talitos_ptr(struct device *dev, struct scatterlist *src,
+ struct scatterlist *dst, unsigned int len,
+ struct talitos_edesc *edesc,
+ struct talitos_ptr *ptr_in,
+ struct talitos_ptr *ptr_out);
+extern int map_sg_in_talitos_ptr(struct device *dev, struct scatterlist *src,
+ unsigned int len, struct talitos_edesc *edesc,
+ enum dma_data_direction dir, struct talitos_ptr *ptr);
+extern void map_sg_out_talitos_ptr(struct device *dev, struct scatterlist *dst,
+ unsigned int len, struct talitos_edesc *edesc,
+ enum dma_data_direction dir,
+ struct talitos_ptr *ptr, int sg_count);
+
+
extern int talitos_submit(struct device *dev, int ch, struct talitos_desc *desc,
void (*callback)(struct device *dev,
struct talitos_desc *desc,
void *context, int error),
void *context);
+extern struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
+ struct scatterlist *assoc,
+ struct scatterlist *src,
+ struct scatterlist *dst,
+ u8 *iv,
+ unsigned int assoclen,
+ unsigned int cryptlen,
+ unsigned int authsize,
+ unsigned int ivsize,
+ int icv_stashing,
+ u32 cryptoflags,
+ bool encrypt);
+extern int talitos_alg_alloc_aead(struct crypto_alg *alg);
+extern int talitos_cra_init(struct crypto_tfm *tfm);
/* .features flag */
#define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001
diff --git a/drivers/crypto/talitos2.c b/drivers/crypto/talitos2.c
new file mode 100644
index 0000000..024cbbd
--- /dev/null
+++ b/drivers/crypto/talitos2.c
@@ -0,0 +1,614 @@
+/*
+ * talitos2 - Freescale Integrated Security Engine (SEC2) device driver
+ *
+ * Copyright (c) 2008-2011 Freescale Semiconductor, Inc.
+ *
+ * Scatterlist Crypto API glue code copied from files with the following:
+ * Copyright (c) 2006-2007 Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
+ *
+ * Crypto algorithm registration code copied from hifn driver:
+ * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@xxxxxxxxxxx>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/crypto.h>
+#include <linux/hw_random.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/des.h>
+#include <crypto/sha.h>
+#include <crypto/md5.h>
+#include <crypto/aead.h>
+#include <crypto/authenc.h>
+#include <crypto/skcipher.h>
+#include <crypto/hash.h>
+#include <crypto/internal/hash.h>
+#include <crypto/scatterwalk.h>
+
+#include "talitos.h"
+
+static void talitos_sg_unmap(struct device *dev,
+ struct talitos_edesc *edesc,
+ struct scatterlist *src,
+ struct scatterlist *dst)
+{
+ unsigned int src_nents = edesc->src_nents ? : 1;
+ unsigned int dst_nents = edesc->dst_nents ? : 1;
+
+ if (src != dst) {
+ if (edesc->src_chained)
+ talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
+ else
+ dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
+
+ if (dst) {
+ if (edesc->dst_chained)
+ talitos_unmap_sg_chain(dev, dst,
+ DMA_FROM_DEVICE);
+ else
+ dma_unmap_sg(dev, dst, dst_nents,
+ DMA_FROM_DEVICE);
+ }
+ } else
+ if (edesc->src_chained)
+ talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
+ else
+ dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
+}
+
+void unmap_sg_talitos_ptr(struct device *dev, struct scatterlist *src,
+ struct scatterlist *dst, unsigned int len,
+ struct talitos_edesc *edesc,
+ struct talitos_ptr *ptr_in,
+ struct talitos_ptr *ptr_out)
+{
+ talitos_sg_unmap(dev, edesc, src, dst);
+}
+
+/*
+ * convert scatterlist to SEC h/w link table format
+ * stop at cryptlen bytes
+ */
+static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
+ int cryptlen, struct talitos_ptr *link_tbl_ptr)
+{
+ int n_sg = sg_count;
+
+ while (n_sg--) {
+ to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
+ link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
+ link_tbl_ptr->j_extent = 0;
+ link_tbl_ptr++;
+ cryptlen -= sg_dma_len(sg);
+ sg = sg_next(sg);
+ }
+
+ /* adjust (decrease) last one (or two) entry's len to cryptlen */
+ link_tbl_ptr--;
+ while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
+ /* Empty this entry, and move to previous one */
+ cryptlen += be16_to_cpu(link_tbl_ptr->len);
+ link_tbl_ptr->len = 0;
+ sg_count--;
+ link_tbl_ptr--;
+ }
+ be16_add_cpu(&link_tbl_ptr->len, cryptlen);
+
+ /* tag end of link table */
+ link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
+
+ return sg_count;
+}
+
+int map_sg_in_talitos_ptr(struct device *dev, struct scatterlist *src,
+ unsigned int len, struct talitos_edesc *edesc,
+ enum dma_data_direction dir, struct talitos_ptr *ptr)
+{
+ int sg_count;
+
+ ptr->len = cpu_to_be16(len);
+ ptr->j_extent = 0;
+
+ sg_count = talitos_map_sg(dev, src, edesc->src_nents ? : 1, dir,
+ edesc->src_chained);
+
+ if (sg_count == 1) {
+ to_talitos_ptr(ptr, sg_dma_address(src));
+ } else {
+ sg_count = sg_to_link_tbl(src, sg_count, len,
+ &edesc->link_tbl[0]);
+ if (sg_count > 1) {
+ to_talitos_ptr(ptr, edesc->dma_link_tbl);
+ ptr->j_extent |= DESC_PTR_LNKTBL_JUMP;
+ dma_sync_single_for_device(dev, edesc->dma_link_tbl,
+ edesc->dma_len,
+ DMA_BIDIRECTIONAL);
+ } else {
+ /* Only one segment now, so no link tbl needed */
+ to_talitos_ptr(ptr, sg_dma_address(src));
+ }
+ }
+ return sg_count;
+}
+
+void map_sg_out_talitos_ptr(struct device *dev, struct scatterlist *dst,
+ unsigned int len, struct talitos_edesc *edesc,
+ enum dma_data_direction dir,
+ struct talitos_ptr *ptr, int sg_count)
+{
+ ptr->len = cpu_to_be16(len);
+ ptr->j_extent = 0;
+
+ if (dir != DMA_NONE)
+ sg_count = talitos_map_sg(dev, dst, edesc->dst_nents ? : 1,
+ dir, edesc->dst_chained);
+
+ if (sg_count == 1) {
+ to_talitos_ptr(ptr, sg_dma_address(dst));
+ } else {
+ struct talitos_ptr *link_tbl_ptr =
+ &edesc->link_tbl[edesc->src_nents + 1];
+
+ to_talitos_ptr(ptr, edesc->dma_link_tbl +
+ (edesc->src_nents + 1) *
+ sizeof(struct talitos_ptr));
+ ptr->j_extent |= DESC_PTR_LNKTBL_JUMP;
+ sg_count = sg_to_link_tbl(dst, sg_count, len, link_tbl_ptr);
+ dma_sync_single_for_device(dev, edesc->dma_link_tbl,
+ edesc->dma_len, DMA_BIDIRECTIONAL);
+ }
+}
+
+int aead_setauthsize(struct crypto_aead *authenc,
+ unsigned int authsize)
+{
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+
+ ctx->authsize = authsize;
+
+ return 0;
+}
+
+int aead_setkey(struct crypto_aead *authenc,
+ const u8 *key, unsigned int keylen)
+{
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ struct crypto_authenc_keys keys;
+
+ if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
+ goto badkey;
+
+ if (keys.authkeylen + keys.enckeylen > TALITOS_MAX_KEY_SIZE)
+ goto badkey;
+
+ memcpy(ctx->key, keys.authkey, keys.authkeylen);
+ memcpy(&ctx->key[keys.authkeylen], keys.enckey, keys.enckeylen);
+
+ ctx->keylen = keys.authkeylen + keys.enckeylen;
+ ctx->enckeylen = keys.enckeylen;
+ ctx->authkeylen = keys.authkeylen;
+
+ return 0;
+
+badkey:
+ crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+}
+
+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);
+ 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);
+
+ if (edesc->assoc_chained)
+ talitos_unmap_sg_chain(dev, areq->assoc, DMA_TO_DEVICE);
+ else if (areq->assoclen)
+ /* assoc_nents counts also for IV in non-contiguous cases */
+ dma_unmap_sg(dev, areq->assoc,
+ edesc->assoc_nents ? edesc->assoc_nents - 1 : 1,
+ DMA_TO_DEVICE);
+
+ talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
+
+ if (edesc->dma_len)
+ dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
+ DMA_BIDIRECTIONAL);
+}
+
+/*
+ * ipsec_esp descriptor callbacks
+ */
+static void ipsec_esp_encrypt_done(struct device *dev,
+ struct talitos_desc *desc, void *context,
+ int err)
+{
+ struct aead_request *areq = context;
+ struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ struct talitos_edesc *edesc;
+ struct scatterlist *sg;
+ void *icvdata;
+
+ edesc = container_of(desc, struct talitos_edesc, desc);
+
+ ipsec_esp_unmap(dev, edesc, areq);
+
+ /* copy the generated ICV to dst */
+ if (edesc->dst_nents) {
+ icvdata = &edesc->link_tbl[edesc->src_nents +
+ edesc->dst_nents + 2 +
+ edesc->assoc_nents];
+ sg = sg_last(areq->dst, edesc->dst_nents);
+ memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
+ icvdata, ctx->authsize);
+ }
+
+ kfree(edesc);
+
+ aead_request_complete(areq, err);
+}
+
+static void ipsec_esp_decrypt_swauth_done(struct device *dev,
+ struct talitos_desc *desc,
+ void *context, int err)
+{
+ struct aead_request *req = context;
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ struct talitos_edesc *edesc;
+ struct scatterlist *sg;
+ void *icvdata;
+
+ edesc = container_of(desc, struct talitos_edesc, desc);
+
+ ipsec_esp_unmap(dev, edesc, req);
+
+ if (!err) {
+ /* auth check */
+ if (edesc->dma_len)
+ icvdata = &edesc->link_tbl[edesc->src_nents +
+ edesc->dst_nents + 2 +
+ edesc->assoc_nents];
+ else
+ icvdata = &edesc->link_tbl[0];
+
+ sg = sg_last(req->dst, edesc->dst_nents ? : 1);
+ err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
+ ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
+ }
+
+ kfree(edesc);
+
+ aead_request_complete(req, err);
+}
+
+static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
+ struct talitos_desc *desc,
+ void *context, int err)
+{
+ struct aead_request *req = context;
+ struct talitos_edesc *edesc;
+
+ edesc = container_of(desc, struct talitos_edesc, desc);
+
+ ipsec_esp_unmap(dev, edesc, req);
+
+ /* check ICV auth status */
+ if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
+ DESC_HDR_LO_ICCR1_PASS))
+ err = -EBADMSG;
+
+ kfree(edesc);
+
+ aead_request_complete(req, err);
+}
+
+/*
+ * fill in and submit ipsec_esp descriptor
+ */
+static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
+ u64 seq, void (*callback) (struct device *dev,
+ struct talitos_desc *desc,
+ void *context, int error))
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ struct talitos_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *dev = ctx->dev;
+ struct talitos_desc *desc = &edesc->desc;
+ unsigned int cryptlen = areq->cryptlen;
+ unsigned int authsize = ctx->authsize;
+ unsigned int ivsize = crypto_aead_ivsize(aead);
+ int sg_count, ret;
+ int sg_link_tbl_len;
+
+ /* hmac key */
+ map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
+ 0, DMA_TO_DEVICE);
+
+ /* hmac data */
+ desc->ptr[1].len = cpu_to_be16(areq->assoclen + ivsize);
+ if (edesc->assoc_nents) {
+ int tbl_off = edesc->src_nents + edesc->dst_nents + 2;
+ struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
+
+ to_talitos_ptr(&desc->ptr[1], edesc->dma_link_tbl + tbl_off *
+ sizeof(struct talitos_ptr));
+ desc->ptr[1].j_extent = DESC_PTR_LNKTBL_JUMP;
+
+ /* assoc_nents - 1 entries for assoc, 1 for IV */
+ sg_count = sg_to_link_tbl(areq->assoc, edesc->assoc_nents - 1,
+ areq->assoclen, tbl_ptr);
+
+ /* add IV to link table */
+ tbl_ptr += sg_count - 1;
+ tbl_ptr->j_extent = 0;
+ tbl_ptr++;
+ to_talitos_ptr(tbl_ptr, edesc->iv_dma);
+ tbl_ptr->len = cpu_to_be16(ivsize);
+ tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
+
+ dma_sync_single_for_device(dev, edesc->dma_link_tbl,
+ edesc->dma_len, DMA_BIDIRECTIONAL);
+ } else {
+ if (areq->assoclen)
+ to_talitos_ptr(&desc->ptr[1],
+ sg_dma_address(areq->assoc));
+ else
+ to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
+ desc->ptr[1].j_extent = 0;
+ }
+
+ /* cipher iv */
+ to_talitos_ptr(&desc->ptr[2], edesc->iv_dma);
+ desc->ptr[2].len = cpu_to_be16(ivsize);
+ desc->ptr[2].j_extent = 0;
+ /* Sync needed for the aead_givencrypt case */
+ dma_sync_single_for_device(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE);
+
+ /* cipher key */
+ map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
+ (char *)&ctx->key + ctx->authkeylen, 0,
+ DMA_TO_DEVICE);
+
+ /*
+ * cipher in
+ * map and adjust cipher len to aead request cryptlen.
+ * extent is bytes of HMAC postpended to ciphertext,
+ * typically 12 for ipsec
+ */
+ desc->ptr[4].len = cpu_to_be16(cryptlen);
+ desc->ptr[4].j_extent = authsize;
+
+ sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
+ (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
+ : DMA_TO_DEVICE,
+ edesc->src_chained);
+
+ if (sg_count == 1) {
+ to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
+ } else {
+ sg_link_tbl_len = cryptlen;
+
+ if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
+ sg_link_tbl_len = cryptlen + authsize;
+
+ sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
+ &edesc->link_tbl[0]);
+ if (sg_count > 1) {
+ desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
+ to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
+ dma_sync_single_for_device(dev, edesc->dma_link_tbl,
+ edesc->dma_len,
+ DMA_BIDIRECTIONAL);
+ } else {
+ /* Only one segment now, so no link tbl needed */
+ to_talitos_ptr(&desc->ptr[4],
+ sg_dma_address(areq->src));
+ }
+ }
+
+ /* cipher out */
+ desc->ptr[5].len = cpu_to_be16(cryptlen);
+ desc->ptr[5].j_extent = authsize;
+
+ if (areq->src != areq->dst)
+ sg_count = talitos_map_sg(dev, areq->dst,
+ edesc->dst_nents ? : 1,
+ DMA_FROM_DEVICE, edesc->dst_chained);
+
+ if (sg_count == 1) {
+ to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
+ } else {
+ int tbl_off = edesc->src_nents + 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));
+ sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
+ tbl_ptr);
+
+ /* Add an entry to the link table for ICV data */
+ tbl_ptr += sg_count - 1;
+ tbl_ptr->j_extent = 0;
+ tbl_ptr++;
+ tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
+ tbl_ptr->len = cpu_to_be16(authsize);
+
+ /* icv data follows link tables */
+ to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl +
+ (tbl_off + edesc->dst_nents + 1 +
+ edesc->assoc_nents) *
+ sizeof(struct talitos_ptr));
+ desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
+ dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
+ edesc->dma_len, DMA_BIDIRECTIONAL);
+ }
+
+ /* iv out */
+ map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
+ DMA_FROM_DEVICE);
+
+ ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
+ if (ret != -EINPROGRESS) {
+ ipsec_esp_unmap(dev, edesc, areq);
+ kfree(edesc);
+ }
+ return ret;
+}
+
+static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 *iv,
+ int icv_stashing, bool encrypt)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ unsigned int ivsize = crypto_aead_ivsize(authenc);
+
+ return talitos_edesc_alloc(ctx->dev, areq->assoc, areq->src, areq->dst,
+ iv, areq->assoclen, areq->cryptlen,
+ ctx->authsize, ivsize, icv_stashing,
+ areq->base.flags, encrypt);
+}
+
+static int aead_encrypt(struct aead_request *req)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ struct talitos_edesc *edesc;
+
+ /* allocate extended descriptor */
+ edesc = aead_edesc_alloc(req, req->iv, 0, true);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ /* set encrypt */
+ edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
+
+ return ipsec_esp(edesc, req, 0, ipsec_esp_encrypt_done);
+}
+
+static int aead_decrypt(struct aead_request *req)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ unsigned int authsize = ctx->authsize;
+ struct talitos_private *priv = dev_get_drvdata(ctx->dev);
+ struct talitos_edesc *edesc;
+ struct scatterlist *sg;
+ void *icvdata;
+
+ req->cryptlen -= authsize;
+
+ /* allocate extended descriptor */
+ edesc = aead_edesc_alloc(req, req->iv, 1, false);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
+ ((!edesc->src_nents && !edesc->dst_nents) ||
+ priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
+
+ /* decrypt and check the ICV */
+ edesc->desc.hdr = ctx->desc_hdr_template |
+ DESC_HDR_DIR_INBOUND |
+ DESC_HDR_MODE1_MDEU_CICV;
+
+ /* reset integrity check result bits */
+ edesc->desc.hdr_lo = 0;
+
+ return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_hwauth_done);
+ }
+
+ /* Have to check the ICV with software */
+ edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
+
+ /* stash incoming ICV for later cmp with ICV generated by the h/w */
+ if (edesc->dma_len)
+ icvdata = &edesc->link_tbl[edesc->src_nents +
+ edesc->dst_nents + 2 +
+ edesc->assoc_nents];
+ else
+ icvdata = &edesc->link_tbl[0];
+
+ sg = sg_last(req->src, edesc->src_nents ? : 1);
+
+ memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
+ ctx->authsize);
+
+ return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_swauth_done);
+}
+
+static int aead_givencrypt(struct aead_givcrypt_request *req)
+{
+ struct aead_request *areq = &req->areq;
+ struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
+ struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
+ struct talitos_edesc *edesc;
+
+ /* allocate extended descriptor */
+ edesc = aead_edesc_alloc(areq, req->giv, 0, true);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ /* set encrypt */
+ edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
+
+ memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
+ /* avoid consecutive packets going out with same IV */
+ *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
+
+ return ipsec_esp(edesc, areq, req->seq, ipsec_esp_encrypt_done);
+}
+
+static int talitos_cra_init_aead(struct crypto_tfm *tfm)
+{
+ struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ talitos_cra_init(tfm);
+
+ /* random first IV */
+ get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
+
+ return 0;
+}
+
+int talitos_alg_alloc_aead(struct crypto_alg *alg)
+{
+ alg->cra_init = talitos_cra_init_aead;
+ alg->cra_type = &crypto_aead_type;
+ alg->cra_aead.setkey = aead_setkey;
+ alg->cra_aead.setauthsize = aead_setauthsize;
+ alg->cra_aead.encrypt = aead_encrypt;
+ alg->cra_aead.decrypt = aead_decrypt;
+ alg->cra_aead.givencrypt = aead_givencrypt;
+ alg->cra_aead.geniv = "<built-in>";
+
+ return 0;
+}
--
2.1.0
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