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crypto: ccree - add AEAD support

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Add CryptoCell AEAD support

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2018-01-22 09:27:03 +00:00 committed by Herbert Xu
parent 63893811b0
commit ff27e85a85
7 changed files with 3710 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/crypto/ccree/Makefile
View file

@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_CRYPTO_DEV_CCREE) := ccree.o
ccree-y := cc_driver.o cc_buffer_mgr.o cc_request_mgr.o cc_cipher.o cc_hash.o cc_ivgen.o cc_sram_mgr.o
ccree-y := cc_driver.o cc_buffer_mgr.o cc_request_mgr.o cc_cipher.o cc_hash.o cc_aead.o cc_ivgen.o cc_sram_mgr.o
ccree-$(CONFIG_DEBUG_FS) += cc_debugfs.o
ccree-$(CONFIG_PM) += cc_pm.o

2702
drivers/crypto/ccree/cc_aead.c Normal file
View file

File diff suppressed because it is too large Load diff

109
drivers/crypto/ccree/cc_aead.h Normal file
View file

@ -0,0 +1,109 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
/* \file cc_aead.h
* ARM CryptoCell AEAD Crypto API
*/
#ifndef __CC_AEAD_H__
#define __CC_AEAD_H__
#include <linux/kernel.h>
#include <crypto/algapi.h>
#include <crypto/ctr.h>
/* mac_cmp - HW writes 8 B but all bytes hold the same value */
#define ICV_CMP_SIZE 8
#define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3)
#define MAX_MAC_SIZE SHA256_DIGEST_SIZE
/* defines for AES GCM configuration buffer */
#define GCM_BLOCK_LEN_SIZE 8
#define GCM_BLOCK_RFC4_IV_OFFSET 4
#define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */
#define GCM_BLOCK_RFC4_NONCE_OFFSET 0
#define GCM_BLOCK_RFC4_NONCE_SIZE 4
/* Offsets into AES CCM configuration buffer */
#define CCM_B0_OFFSET 0
#define CCM_A0_OFFSET 16
#define CCM_CTR_COUNT_0_OFFSET 32
/* CCM B0 and CTR_COUNT constants. */
#define CCM_BLOCK_NONCE_OFFSET 1 /* Nonce offset inside B0 and CTR_COUNT */
#define CCM_BLOCK_NONCE_SIZE 3 /* Nonce size inside B0 and CTR_COUNT */
#define CCM_BLOCK_IV_OFFSET 4 /* IV offset inside B0 and CTR_COUNT */
#define CCM_BLOCK_IV_SIZE 8 /* IV size inside B0 and CTR_COUNT */
enum aead_ccm_header_size {
ccm_header_size_null = -1,
ccm_header_size_zero = 0,
ccm_header_size_2 = 2,
ccm_header_size_6 = 6,
ccm_header_size_max = S32_MAX
};
struct aead_req_ctx {
/* Allocate cache line although only 4 bytes are needed to
* assure next field falls @ cache line
* Used for both: digest HW compare and CCM/GCM MAC value
*/
u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned;
u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned;
//used in gcm
u8 gcm_iv_inc1[AES_BLOCK_SIZE] ____cacheline_aligned;
u8 gcm_iv_inc2[AES_BLOCK_SIZE] ____cacheline_aligned;
u8 hkey[AES_BLOCK_SIZE] ____cacheline_aligned;
struct {
u8 len_a[GCM_BLOCK_LEN_SIZE] ____cacheline_aligned;
u8 len_c[GCM_BLOCK_LEN_SIZE];
} gcm_len_block;
u8 ccm_config[CCM_CONFIG_BUF_SIZE] ____cacheline_aligned;
/* HW actual size input */
unsigned int hw_iv_size ____cacheline_aligned;
/* used to prevent cache coherence problem */
u8 backup_mac[MAX_MAC_SIZE];
u8 *backup_iv; /*store iv for generated IV flow*/
u8 *backup_giv; /*store iv for rfc3686(ctr) flow*/
dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */
/* buffer for internal ccm configurations */
dma_addr_t ccm_iv0_dma_addr;
dma_addr_t icv_dma_addr; /* Phys. address of ICV */
//used in gcm
/* buffer for internal gcm configurations */
dma_addr_t gcm_iv_inc1_dma_addr;
/* buffer for internal gcm configurations */
dma_addr_t gcm_iv_inc2_dma_addr;
dma_addr_t hkey_dma_addr; /* Phys. address of hkey */
dma_addr_t gcm_block_len_dma_addr; /* Phys. address of gcm block len */
bool is_gcm4543;
u8 *icv_virt_addr; /* Virt. address of ICV */
struct async_gen_req_ctx gen_ctx;
struct cc_mlli assoc;
struct cc_mlli src;
struct cc_mlli dst;
struct scatterlist *src_sgl;
struct scatterlist *dst_sgl;
unsigned int src_offset;
unsigned int dst_offset;
enum cc_req_dma_buf_type assoc_buff_type;
enum cc_req_dma_buf_type data_buff_type;
struct mlli_params mlli_params;
unsigned int cryptlen;
struct scatterlist ccm_adata_sg;
enum aead_ccm_header_size ccm_hdr_size;
unsigned int req_authsize;
enum drv_cipher_mode cipher_mode;
bool is_icv_fragmented;
bool is_single_pass;
bool plaintext_authenticate_only; //for gcm_rfc4543
};
int cc_aead_alloc(struct cc_drvdata *drvdata);
int cc_aead_free(struct cc_drvdata *drvdata);
#endif /*__CC_AEAD_H__*/

882
drivers/crypto/ccree/cc_buffer_mgr.c
View file

@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
#include <crypto/internal/aead.h>
#include <crypto/authenc.h>
#include <crypto/scatterwalk.h>
#include <linux/dmapool.h>
@ -10,6 +11,7 @@
#include "cc_lli_defs.h"
#include "cc_cipher.h"
#include "cc_hash.h"
#include "cc_aead.h"
enum dma_buffer_type {
DMA_NULL_TYPE = -1,
@ -51,6 +53,27 @@ static inline char *cc_dma_buf_type(enum cc_req_dma_buf_type type)
}
}
/**
* cc_copy_mac() - Copy MAC to temporary location
*
* @dev: device object
* @req: aead request object
* @dir: [IN] copy from/to sgl
*/
static void cc_copy_mac(struct device *dev, struct aead_request *req,
enum cc_sg_cpy_direct dir)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
u32 skip = req->assoclen + req->cryptlen;
if (areq_ctx->is_gcm4543)
skip += crypto_aead_ivsize(tfm);
cc_copy_sg_portion(dev, areq_ctx->backup_mac, req->src,
(skip - areq_ctx->req_authsize), skip, dir);
}
/**
* cc_get_sgl_nents() - Get scatterlist number of entries.
*
@ -246,6 +269,27 @@ static int cc_generate_mlli(struct device *dev, struct buffer_array *sg_data,
return rc;
}
static void cc_add_buffer_entry(struct device *dev,
struct buffer_array *sgl_data,
dma_addr_t buffer_dma, unsigned int buffer_len,
bool is_last_entry, u32 *mlli_nents)
{
unsigned int index = sgl_data->num_of_buffers;
dev_dbg(dev, "index=%u single_buff=%pad buffer_len=0x%08X is_last=%d\n",
index, &buffer_dma, buffer_len, is_last_entry);
sgl_data->nents[index] = 1;
sgl_data->entry[index].buffer_dma = buffer_dma;
sgl_data->offset[index] = 0;
sgl_data->total_data_len[index] = buffer_len;
sgl_data->type[index] = DMA_BUFF_TYPE;
sgl_data->is_last[index] = is_last_entry;
sgl_data->mlli_nents[index] = mlli_nents;
if (sgl_data->mlli_nents[index])
*sgl_data->mlli_nents[index] = 0;
sgl_data->num_of_buffers++;
}
static void cc_add_sg_entry(struct device *dev, struct buffer_array *sgl_data,
unsigned int nents, struct scatterlist *sgl,
unsigned int data_len, unsigned int data_offset,
@ -349,6 +393,33 @@ static int cc_map_sg(struct device *dev, struct scatterlist *sg,
return 0;
}
static int
cc_set_aead_conf_buf(struct device *dev, struct aead_req_ctx *areq_ctx,
u8 *config_data, struct buffer_array *sg_data,
unsigned int assoclen)
{
dev_dbg(dev, " handle additional data config set to DLLI\n");
/* create sg for the current buffer */
sg_init_one(&areq_ctx->ccm_adata_sg, config_data,
AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size);
if (dma_map_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE) != 1) {
dev_err(dev, "dma_map_sg() config buffer failed\n");
return -ENOMEM;
}
dev_dbg(dev, "Mapped curr_buff: dma_address=%pad page=%p addr=%pK offset=%u length=%u\n",
&sg_dma_address(&areq_ctx->ccm_adata_sg),
sg_page(&areq_ctx->ccm_adata_sg),
sg_virt(&areq_ctx->ccm_adata_sg),
areq_ctx->ccm_adata_sg.offset, areq_ctx->ccm_adata_sg.length);
/* prepare for case of MLLI */
if (assoclen > 0) {
cc_add_sg_entry(dev, sg_data, 1, &areq_ctx->ccm_adata_sg,
(AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size),
0, false, NULL);
}
return 0;
}
static int cc_set_hash_buf(struct device *dev, struct ahash_req_ctx *areq_ctx,
u8 *curr_buff, u32 curr_buff_cnt,
struct buffer_array *sg_data)
@ -497,6 +568,817 @@ int cc_map_cipher_request(struct cc_drvdata *drvdata, void *ctx,
return rc;
}
void cc_unmap_aead_request(struct device *dev, struct aead_request *req)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
unsigned int hw_iv_size = areq_ctx->hw_iv_size;
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
u32 dummy;
bool chained;
u32 size_to_unmap = 0;
if (areq_ctx->mac_buf_dma_addr) {
dma_unmap_single(dev, areq_ctx->mac_buf_dma_addr,
MAX_MAC_SIZE, DMA_BIDIRECTIONAL);
}
if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
if (areq_ctx->hkey_dma_addr) {
dma_unmap_single(dev, areq_ctx->hkey_dma_addr,
AES_BLOCK_SIZE, DMA_BIDIRECTIONAL);
}
if (areq_ctx->gcm_block_len_dma_addr) {
dma_unmap_single(dev, areq_ctx->gcm_block_len_dma_addr,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
}
if (areq_ctx->gcm_iv_inc1_dma_addr) {
dma_unmap_single(dev, areq_ctx->gcm_iv_inc1_dma_addr,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
}
if (areq_ctx->gcm_iv_inc2_dma_addr) {
dma_unmap_single(dev, areq_ctx->gcm_iv_inc2_dma_addr,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
}
}
if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
if (areq_ctx->ccm_iv0_dma_addr) {
dma_unmap_single(dev, areq_ctx->ccm_iv0_dma_addr,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
}
dma_unmap_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE);
}
if (areq_ctx->gen_ctx.iv_dma_addr) {
dma_unmap_single(dev, areq_ctx->gen_ctx.iv_dma_addr,
hw_iv_size, DMA_BIDIRECTIONAL);
}
/*In case a pool was set, a table was
*allocated and should be released
*/
if (areq_ctx->mlli_params.curr_pool) {
dev_dbg(dev, "free MLLI buffer: dma=%pad virt=%pK\n",
&areq_ctx->mlli_params.mlli_dma_addr,
areq_ctx->mlli_params.mlli_virt_addr);
dma_pool_free(areq_ctx->mlli_params.curr_pool,
areq_ctx->mlli_params.mlli_virt_addr,
areq_ctx->mlli_params.mlli_dma_addr);
}
dev_dbg(dev, "Unmapping src sgl: req->src=%pK areq_ctx->src.nents=%u areq_ctx->assoc.nents=%u assoclen:%u cryptlen=%u\n",
sg_virt(req->src), areq_ctx->src.nents, areq_ctx->assoc.nents,
req->assoclen, req->cryptlen);
size_to_unmap = req->assoclen + req->cryptlen;
if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT)
size_to_unmap += areq_ctx->req_authsize;
if (areq_ctx->is_gcm4543)
size_to_unmap += crypto_aead_ivsize(tfm);
dma_unmap_sg(dev, req->src,
cc_get_sgl_nents(dev, req->src, size_to_unmap,
&dummy, &chained),
DMA_BIDIRECTIONAL);
if (req->src != req->dst) {
dev_dbg(dev, "Unmapping dst sgl: req->dst=%pK\n",
sg_virt(req->dst));
dma_unmap_sg(dev, req->dst,
cc_get_sgl_nents(dev, req->dst, size_to_unmap,
&dummy, &chained),
DMA_BIDIRECTIONAL);
}
if (drvdata->coherent &&
areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT &&
req->src == req->dst) {
/* copy back mac from temporary location to deal with possible
* data memory overriding that caused by cache coherence
* problem.
*/
cc_copy_mac(dev, req, CC_SG_FROM_BUF);
}
}
static int cc_get_aead_icv_nents(struct device *dev, struct scatterlist *sgl,
unsigned int sgl_nents, unsigned int authsize,
u32 last_entry_data_size,
bool *is_icv_fragmented)
{
unsigned int icv_max_size = 0;
unsigned int icv_required_size = authsize > last_entry_data_size ?
(authsize - last_entry_data_size) :
authsize;
unsigned int nents;
unsigned int i;
if (sgl_nents < MAX_ICV_NENTS_SUPPORTED) {
*is_icv_fragmented = false;
return 0;
}
for (i = 0 ; i < (sgl_nents - MAX_ICV_NENTS_SUPPORTED) ; i++) {
if (!sgl)
break;
sgl = sg_next(sgl);
}
if (sgl)
icv_max_size = sgl->length;
if (last_entry_data_size > authsize) {
/* ICV attached to data in last entry (not fragmented!) */
nents = 0;
*is_icv_fragmented = false;
} else if (last_entry_data_size == authsize) {
/* ICV placed in whole last entry (not fragmented!) */
nents = 1;
*is_icv_fragmented = false;
} else if (icv_max_size > icv_required_size) {
nents = 1;
*is_icv_fragmented = true;
} else if (icv_max_size == icv_required_size) {
nents = 2;
*is_icv_fragmented = true;
} else {
dev_err(dev, "Unsupported num. of ICV fragments (> %d)\n",
MAX_ICV_NENTS_SUPPORTED);
nents = -1; /*unsupported*/
}
dev_dbg(dev, "is_frag=%s icv_nents=%u\n",
(*is_icv_fragmented ? "true" : "false"), nents);
return nents;
}
static int cc_aead_chain_iv(struct cc_drvdata *drvdata,
struct aead_request *req,
struct buffer_array *sg_data,
bool is_last, bool do_chain)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
unsigned int hw_iv_size = areq_ctx->hw_iv_size;
struct device *dev = drvdata_to_dev(drvdata);
int rc = 0;
if (!req->iv) {
areq_ctx->gen_ctx.iv_dma_addr = 0;
goto chain_iv_exit;
}
areq_ctx->gen_ctx.iv_dma_addr = dma_map_single(dev, req->iv,
hw_iv_size,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev, areq_ctx->gen_ctx.iv_dma_addr)) {
dev_err(dev, "Mapping iv %u B at va=%pK for DMA failed\n",
hw_iv_size, req->iv);
rc = -ENOMEM;
goto chain_iv_exit;
}
dev_dbg(dev, "Mapped iv %u B at va=%pK to dma=%pad\n",
hw_iv_size, req->iv, &areq_ctx->gen_ctx.iv_dma_addr);
// TODO: what about CTR?? ask Ron
if (do_chain && areq_ctx->plaintext_authenticate_only) {
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
unsigned int iv_size_to_authenc = crypto_aead_ivsize(tfm);
unsigned int iv_ofs = GCM_BLOCK_RFC4_IV_OFFSET;
/* Chain to given list */
cc_add_buffer_entry(dev, sg_data,
(areq_ctx->gen_ctx.iv_dma_addr + iv_ofs),
iv_size_to_authenc, is_last,
&areq_ctx->assoc.mlli_nents);
areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI;
}
chain_iv_exit:
return rc;
}
static int cc_aead_chain_assoc(struct cc_drvdata *drvdata,
struct aead_request *req,
struct buffer_array *sg_data,
bool is_last, bool do_chain)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
int rc = 0;
u32 mapped_nents = 0;
struct scatterlist *current_sg = req->src;
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
unsigned int sg_index = 0;
u32 size_of_assoc = req->assoclen;
struct device *dev = drvdata_to_dev(drvdata);
if (areq_ctx->is_gcm4543)
size_of_assoc += crypto_aead_ivsize(tfm);
if (!sg_data) {
rc = -EINVAL;
goto chain_assoc_exit;
}
if (req->assoclen == 0) {
areq_ctx->assoc_buff_type = CC_DMA_BUF_NULL;
areq_ctx->assoc.nents = 0;
areq_ctx->assoc.mlli_nents = 0;
dev_dbg(dev, "Chain assoc of length 0: buff_type=%s nents=%u\n",
cc_dma_buf_type(areq_ctx->assoc_buff_type),
areq_ctx->assoc.nents);
goto chain_assoc_exit;
}
//iterate over the sgl to see how many entries are for associated data
//it is assumed that if we reach here , the sgl is already mapped
sg_index = current_sg->length;
//the first entry in the scatter list contains all the associated data
if (sg_index > size_of_assoc) {
mapped_nents++;
} else {
while (sg_index <= size_of_assoc) {
current_sg = sg_next(current_sg);
/* if have reached the end of the sgl, then this is
* unexpected
*/
if (!current_sg) {
dev_err(dev, "reached end of sg list. unexpected\n");
return -EINVAL;
}
sg_index += current_sg->length;
mapped_nents++;
}
}
if (mapped_nents > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES) {
dev_err(dev, "Too many fragments. current %d max %d\n",
mapped_nents, LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES);
return -ENOMEM;
}
areq_ctx->assoc.nents = mapped_nents;
/* in CCM case we have additional entry for
* ccm header configurations
*/
if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
if ((mapped_nents + 1) > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES) {
dev_err(dev, "CCM case.Too many fragments. Current %d max %d\n",
(areq_ctx->assoc.nents + 1),
LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES);
rc = -ENOMEM;
goto chain_assoc_exit;
}
}
if (mapped_nents == 1 && areq_ctx->ccm_hdr_size == ccm_header_size_null)
areq_ctx->assoc_buff_type = CC_DMA_BUF_DLLI;
else
areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI;
if (do_chain || areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI) {
dev_dbg(dev, "Chain assoc: buff_type=%s nents=%u\n",
cc_dma_buf_type(areq_ctx->assoc_buff_type),
areq_ctx->assoc.nents);
cc_add_sg_entry(dev, sg_data, areq_ctx->assoc.nents, req->src,
req->assoclen, 0, is_last,
&areq_ctx->assoc.mlli_nents);
areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI;
}
chain_assoc_exit:
return rc;
}
static void cc_prepare_aead_data_dlli(struct aead_request *req,
u32 *src_last_bytes, u32 *dst_last_bytes)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
unsigned int authsize = areq_ctx->req_authsize;
areq_ctx->is_icv_fragmented = false;
if (req->src == req->dst) {
/*INPLACE*/
areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) +
(*src_last_bytes - authsize);
} else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
/*NON-INPLACE and DECRYPT*/
areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) +
(*src_last_bytes - authsize);
} else {
/*NON-INPLACE and ENCRYPT*/
areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->dst_sgl) +
(*dst_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(areq_ctx->dst_sgl) +
(*dst_last_bytes - authsize);
}
}
static int cc_prepare_aead_data_mlli(struct cc_drvdata *drvdata,
struct aead_request *req,
struct buffer_array *sg_data,
u32 *src_last_bytes, u32 *dst_last_bytes,
bool is_last_table)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
unsigned int authsize = areq_ctx->req_authsize;
int rc = 0, icv_nents;
struct device *dev = drvdata_to_dev(drvdata);
struct scatterlist *sg;
if (req->src == req->dst) {
/*INPLACE*/
cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents,
areq_ctx->src_sgl, areq_ctx->cryptlen,
areq_ctx->src_offset, is_last_table,
&areq_ctx->src.mlli_nents);
icv_nents = cc_get_aead_icv_nents(dev, areq_ctx->src_sgl,
areq_ctx->src.nents,
authsize, *src_last_bytes,
&areq_ctx->is_icv_fragmented);
if (icv_nents < 0) {
rc = -ENOTSUPP;
goto prepare_data_mlli_exit;
}
if (areq_ctx->is_icv_fragmented) {
/* Backup happens only when ICV is fragmented, ICV
* verification is made by CPU compare in order to
* simplify MAC verification upon request completion
*/
if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
/* In coherent platforms (e.g. ACP)
* already copying ICV for any
* INPLACE-DECRYPT operation, hence
* we must neglect this code.
*/
if (!drvdata->coherent)
cc_copy_mac(dev, req, CC_SG_TO_BUF);
areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
} else {
areq_ctx->icv_virt_addr = areq_ctx->mac_buf;
areq_ctx->icv_dma_addr =
areq_ctx->mac_buf_dma_addr;
}
} else { /* Contig. ICV */
sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1];
/*Should hanlde if the sg is not contig.*/
areq_ctx->icv_dma_addr = sg_dma_address(sg) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(sg) +
(*src_last_bytes - authsize);
}
} else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
/*NON-INPLACE and DECRYPT*/
cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents,
areq_ctx->src_sgl, areq_ctx->cryptlen,
areq_ctx->src_offset, is_last_table,
&areq_ctx->src.mlli_nents);
cc_add_sg_entry(dev, sg_data, areq_ctx->dst.nents,
areq_ctx->dst_sgl, areq_ctx->cryptlen,
areq_ctx->dst_offset, is_last_table,
&areq_ctx->dst.mlli_nents);
icv_nents = cc_get_aead_icv_nents(dev, areq_ctx->src_sgl,
areq_ctx->src.nents,
authsize, *src_last_bytes,
&areq_ctx->is_icv_fragmented);
if (icv_nents < 0) {
rc = -ENOTSUPP;
goto prepare_data_mlli_exit;
}
/* Backup happens only when ICV is fragmented, ICV
* verification is made by CPU compare in order to simplify
* MAC verification upon request completion
*/
if (areq_ctx->is_icv_fragmented) {
cc_copy_mac(dev, req, CC_SG_TO_BUF);
areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
} else { /* Contig. ICV */
sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1];
/*Should hanlde if the sg is not contig.*/
areq_ctx->icv_dma_addr = sg_dma_address(sg) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(sg) +
(*src_last_bytes - authsize);
}
} else {
/*NON-INPLACE and ENCRYPT*/
cc_add_sg_entry(dev, sg_data, areq_ctx->dst.nents,
areq_ctx->dst_sgl, areq_ctx->cryptlen,
areq_ctx->dst_offset, is_last_table,
&areq_ctx->dst.mlli_nents);
cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents,
areq_ctx->src_sgl, areq_ctx->cryptlen,
areq_ctx->src_offset, is_last_table,
&areq_ctx->src.mlli_nents);
icv_nents = cc_get_aead_icv_nents(dev, areq_ctx->dst_sgl,
areq_ctx->dst.nents,
authsize, *dst_last_bytes,
&areq_ctx->is_icv_fragmented);
if (icv_nents < 0) {
rc = -ENOTSUPP;
goto prepare_data_mlli_exit;
}
if (!areq_ctx->is_icv_fragmented) {
sg = &areq_ctx->dst_sgl[areq_ctx->dst.nents - 1];
/* Contig. ICV */
areq_ctx->icv_dma_addr = sg_dma_address(sg) +
(*dst_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(sg) +
(*dst_last_bytes - authsize);
} else {
areq_ctx->icv_dma_addr = areq_ctx->mac_buf_dma_addr;
areq_ctx->icv_virt_addr = areq_ctx->mac_buf;
}
}
prepare_data_mlli_exit:
return rc;
}
static int cc_aead_chain_data(struct cc_drvdata *drvdata,
struct aead_request *req,
struct buffer_array *sg_data,
bool is_last_table, bool do_chain)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
struct device *dev = drvdata_to_dev(drvdata);
enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
unsigned int authsize = areq_ctx->req_authsize;
unsigned int src_last_bytes = 0, dst_last_bytes = 0;
int rc = 0;
u32 src_mapped_nents = 0, dst_mapped_nents = 0;
u32 offset = 0;
/* non-inplace mode */
unsigned int size_for_map = req->assoclen + req->cryptlen;
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
u32 sg_index = 0;
bool chained = false;
bool is_gcm4543 = areq_ctx->is_gcm4543;
u32 size_to_skip = req->assoclen;
if (is_gcm4543)
size_to_skip += crypto_aead_ivsize(tfm);
offset = size_to_skip;
if (!sg_data)
return -EINVAL;
areq_ctx->src_sgl = req->src;
areq_ctx->dst_sgl = req->dst;
if (is_gcm4543)
size_for_map += crypto_aead_ivsize(tfm);
size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ?
authsize : 0;
src_mapped_nents = cc_get_sgl_nents(dev, req->src, size_for_map,
&src_last_bytes, &chained);
sg_index = areq_ctx->src_sgl->length;
//check where the data starts
while (sg_index <= size_to_skip) {
offset -= areq_ctx->src_sgl->length;
areq_ctx->src_sgl = sg_next(areq_ctx->src_sgl);
//if have reached the end of the sgl, then this is unexpected
if (!areq_ctx->src_sgl) {
dev_err(dev, "reached end of sg list. unexpected\n");
return -EINVAL;
}
sg_index += areq_ctx->src_sgl->length;
src_mapped_nents--;
}
if (src_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES) {
dev_err(dev, "Too many fragments. current %d max %d\n",
src_mapped_nents, LLI_MAX_NUM_OF_DATA_ENTRIES);
return -ENOMEM;
}
areq_ctx->src.nents = src_mapped_nents;
areq_ctx->src_offset = offset;
if (req->src != req->dst) {
size_for_map = req->assoclen + req->cryptlen;
size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ?
authsize : 0;
if (is_gcm4543)
size_for_map += crypto_aead_ivsize(tfm);
rc = cc_map_sg(dev, req->dst, size_for_map, DMA_BIDIRECTIONAL,
&areq_ctx->dst.nents,
LLI_MAX_NUM_OF_DATA_ENTRIES, &dst_last_bytes,
&dst_mapped_nents);
if (rc) {
rc = -ENOMEM;
goto chain_data_exit;
}
}
dst_mapped_nents = cc_get_sgl_nents(dev, req->dst, size_for_map,
&dst_last_bytes, &chained);
sg_index = areq_ctx->dst_sgl->length;
offset = size_to_skip;
//check where the data starts
while (sg_index <= size_to_skip) {
offset -= areq_ctx->dst_sgl->length;
areq_ctx->dst_sgl = sg_next(areq_ctx->dst_sgl);
//if have reached the end of the sgl, then this is unexpected
if (!areq_ctx->dst_sgl) {
dev_err(dev, "reached end of sg list. unexpected\n");
return -EINVAL;
}
sg_index += areq_ctx->dst_sgl->length;
dst_mapped_nents--;
}
if (dst_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES) {
dev_err(dev, "Too many fragments. current %d max %d\n",
dst_mapped_nents, LLI_MAX_NUM_OF_DATA_ENTRIES);
return -ENOMEM;
}
areq_ctx->dst.nents = dst_mapped_nents;
areq_ctx->dst_offset = offset;
if (src_mapped_nents > 1 ||
dst_mapped_nents > 1 ||
do_chain) {
areq_ctx->data_buff_type = CC_DMA_BUF_MLLI;
rc = cc_prepare_aead_data_mlli(drvdata, req, sg_data,
&src_last_bytes,
&dst_last_bytes, is_last_table);
} else {
areq_ctx->data_buff_type = CC_DMA_BUF_DLLI;
cc_prepare_aead_data_dlli(req, &src_last_bytes,
&dst_last_bytes);
}
chain_data_exit:
return rc;
}
static void cc_update_aead_mlli_nents(struct cc_drvdata *drvdata,
struct aead_request *req)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
u32 curr_mlli_size = 0;
if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI) {
areq_ctx->assoc.sram_addr = drvdata->mlli_sram_addr;
curr_mlli_size = areq_ctx->assoc.mlli_nents *
LLI_ENTRY_BYTE_SIZE;
}
if (areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) {
/*Inplace case dst nents equal to src nents*/
if (req->src == req->dst) {
areq_ctx->dst.mlli_nents = areq_ctx->src.mlli_nents;
areq_ctx->src.sram_addr = drvdata->mlli_sram_addr +
curr_mlli_size;
areq_ctx->dst.sram_addr = areq_ctx->src.sram_addr;
if (!areq_ctx->is_single_pass)
areq_ctx->assoc.mlli_nents +=
areq_ctx->src.mlli_nents;
} else {
if (areq_ctx->gen_ctx.op_type ==
DRV_CRYPTO_DIRECTION_DECRYPT) {
areq_ctx->src.sram_addr =
drvdata->mlli_sram_addr +
curr_mlli_size;
areq_ctx->dst.sram_addr =
areq_ctx->src.sram_addr +
areq_ctx->src.mlli_nents *
LLI_ENTRY_BYTE_SIZE;
if (!areq_ctx->is_single_pass)
areq_ctx->assoc.mlli_nents +=
areq_ctx->src.mlli_nents;
} else {
areq_ctx->dst.sram_addr =
drvdata->mlli_sram_addr +
curr_mlli_size;
areq_ctx->src.sram_addr =
areq_ctx->dst.sram_addr +
areq_ctx->dst.mlli_nents *
LLI_ENTRY_BYTE_SIZE;
if (!areq_ctx->is_single_pass)
areq_ctx->assoc.mlli_nents +=
areq_ctx->dst.mlli_nents;
}
}
}
}
int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
struct mlli_params *mlli_params = &areq_ctx->mlli_params;
struct device *dev = drvdata_to_dev(drvdata);
struct buffer_array sg_data;
unsigned int authsize = areq_ctx->req_authsize;
struct buff_mgr_handle *buff_mgr = drvdata->buff_mgr_handle;
int rc = 0;
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
bool is_gcm4543 = areq_ctx->is_gcm4543;
dma_addr_t dma_addr;
u32 mapped_nents = 0;
u32 dummy = 0; /*used for the assoc data fragments */
u32 size_to_map = 0;
gfp_t flags = cc_gfp_flags(&req->base);
mlli_params->curr_pool = NULL;
sg_data.num_of_buffers = 0;
/* copy mac to a temporary location to deal with possible
* data memory overriding that caused by cache coherence problem.
*/
if (drvdata->coherent &&
areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT &&
req->src == req->dst)
cc_copy_mac(dev, req, CC_SG_TO_BUF);
/* cacluate the size for cipher remove ICV in decrypt*/
areq_ctx->cryptlen = (areq_ctx->gen_ctx.op_type ==
DRV_CRYPTO_DIRECTION_ENCRYPT) ?
req->cryptlen :
(req->cryptlen - authsize);
dma_addr = dma_map_single(dev, areq_ctx->mac_buf, MAX_MAC_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Mapping mac_buf %u B at va=%pK for DMA failed\n",
MAX_MAC_SIZE, areq_ctx->mac_buf);
rc = -ENOMEM;
goto aead_map_failure;
}
areq_ctx->mac_buf_dma_addr = dma_addr;
if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
void *addr = areq_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET;
dma_addr = dma_map_single(dev, addr, AES_BLOCK_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Mapping mac_buf %u B at va=%pK for DMA failed\n",
AES_BLOCK_SIZE, addr);
areq_ctx->ccm_iv0_dma_addr = 0;
rc = -ENOMEM;
goto aead_map_failure;
}
areq_ctx->ccm_iv0_dma_addr = dma_addr;
if (cc_set_aead_conf_buf(dev, areq_ctx, areq_ctx->ccm_config,
&sg_data, req->assoclen)) {
rc = -ENOMEM;
goto aead_map_failure;
}
}
if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
dma_addr = dma_map_single(dev, areq_ctx->hkey, AES_BLOCK_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Mapping hkey %u B at va=%pK for DMA failed\n",
AES_BLOCK_SIZE, areq_ctx->hkey);
rc = -ENOMEM;
goto aead_map_failure;
}
areq_ctx->hkey_dma_addr = dma_addr;
dma_addr = dma_map_single(dev, &areq_ctx->gcm_len_block,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Mapping gcm_len_block %u B at va=%pK for DMA failed\n",
AES_BLOCK_SIZE, &areq_ctx->gcm_len_block);
rc = -ENOMEM;
goto aead_map_failure;
}
areq_ctx->gcm_block_len_dma_addr = dma_addr;
dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc1,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Mapping gcm_iv_inc1 %u B at va=%pK for DMA failed\n",
AES_BLOCK_SIZE, (areq_ctx->gcm_iv_inc1));
areq_ctx->gcm_iv_inc1_dma_addr = 0;
rc = -ENOMEM;
goto aead_map_failure;
}
areq_ctx->gcm_iv_inc1_dma_addr = dma_addr;
dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc2,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Mapping gcm_iv_inc2 %u B at va=%pK for DMA failed\n",
AES_BLOCK_SIZE, (areq_ctx->gcm_iv_inc2));
areq_ctx->gcm_iv_inc2_dma_addr = 0;
rc = -ENOMEM;
goto aead_map_failure;
}
areq_ctx->gcm_iv_inc2_dma_addr = dma_addr;
}
size_to_map = req->cryptlen + req->assoclen;
if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT)
size_to_map += authsize;
if (is_gcm4543)
size_to_map += crypto_aead_ivsize(tfm);
rc = cc_map_sg(dev, req->src, size_to_map, DMA_BIDIRECTIONAL,
&areq_ctx->src.nents,
(LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES +
LLI_MAX_NUM_OF_DATA_ENTRIES),
&dummy, &mapped_nents);
if (rc) {
rc = -ENOMEM;
goto aead_map_failure;
}
if (areq_ctx->is_single_pass) {
/*
* Create MLLI table for:
* (1) Assoc. data
* (2) Src/Dst SGLs
* Note: IV is contg. buffer (not an SGL)
*/
rc = cc_aead_chain_assoc(drvdata, req, &sg_data, true, false);
if (rc)
goto aead_map_failure;
rc = cc_aead_chain_iv(drvdata, req, &sg_data, true, false);
if (rc)
goto aead_map_failure;
rc = cc_aead_chain_data(drvdata, req, &sg_data, true, false);
if (rc)
goto aead_map_failure;
} else { /* DOUBLE-PASS flow */
/*
* Prepare MLLI table(s) in this order:
*
* If ENCRYPT/DECRYPT (inplace):
* (1) MLLI table for assoc
* (2) IV entry (chained right after end of assoc)
* (3) MLLI for src/dst (inplace operation)
*
* If ENCRYPT (non-inplace)
* (1) MLLI table for assoc
* (2) IV entry (chained right after end of assoc)
* (3) MLLI for dst
* (4) MLLI for src
*
* If DECRYPT (non-inplace)
* (1) MLLI table for assoc
* (2) IV entry (chained right after end of assoc)
* (3) MLLI for src
* (4) MLLI for dst
*/
rc = cc_aead_chain_assoc(drvdata, req, &sg_data, false, true);
if (rc)
goto aead_map_failure;
rc = cc_aead_chain_iv(drvdata, req, &sg_data, false, true);
if (rc)
goto aead_map_failure;
rc = cc_aead_chain_data(drvdata, req, &sg_data, true, true);
if (rc)
goto aead_map_failure;
}
/* Mlli support -start building the MLLI according to the above
* results
*/
if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI ||
areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
if (rc)
goto aead_map_failure;
cc_update_aead_mlli_nents(drvdata, req);
dev_dbg(dev, "assoc params mn %d\n",
areq_ctx->assoc.mlli_nents);
dev_dbg(dev, "src params mn %d\n", areq_ctx->src.mlli_nents);
dev_dbg(dev, "dst params mn %d\n", areq_ctx->dst.mlli_nents);
}
return 0;
aead_map_failure:
cc_unmap_aead_request(dev, req);
return rc;
}
int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,
struct scatterlist *src, unsigned int nbytes,
bool do_update, gfp_t flags)

4
drivers/crypto/ccree/cc_buffer_mgr.h
View file

@ -48,6 +48,10 @@ int cc_map_cipher_request(struct cc_drvdata *drvdata, void *ctx,
void cc_unmap_cipher_request(struct device *dev, void *ctx, unsigned int ivsize,
struct scatterlist *src, struct scatterlist *dst);
int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req);
void cc_unmap_aead_request(struct device *dev, struct aead_request *req);
int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,
struct scatterlist *src, unsigned int nbytes,
bool do_update, gfp_t flags);

10
drivers/crypto/ccree/cc_driver.c
View file

@ -20,6 +20,7 @@
#include "cc_buffer_mgr.h"
#include "cc_debugfs.h"
#include "cc_cipher.h"
#include "cc_aead.h"
#include "cc_hash.h"
#include "cc_ivgen.h"
#include "cc_sram_mgr.h"
@ -294,8 +295,16 @@ static int init_cc_resources(struct platform_device *plat_dev)
goto post_cipher_err;
}
rc = cc_aead_alloc(new_drvdata);
if (rc) {
dev_err(dev, "cc_aead_alloc failed\n");
goto post_hash_err;
}
return 0;
post_hash_err:
cc_hash_free(new_drvdata);
post_cipher_err:
cc_cipher_free(new_drvdata);
post_ivgen_err:
@ -328,6 +337,7 @@ static void cleanup_cc_resources(struct platform_device *plat_dev)
struct cc_drvdata *drvdata =
(struct cc_drvdata *)platform_get_drvdata(plat_dev);
cc_aead_free(drvdata);
cc_hash_free(drvdata);
cc_cipher_free(drvdata);
cc_ivgen_fini(drvdata);

2
drivers/crypto/ccree/cc_driver.h
View file

@ -114,6 +114,7 @@ struct cc_drvdata {
void *buff_mgr_handle;
void *cipher_handle;
void *hash_handle;
void *aead_handle;
void *request_mgr_handle;
void *ivgen_handle;
void *sram_mgr_handle;
@ -130,6 +131,7 @@ struct cc_crypto_alg {
unsigned int data_unit;
struct cc_drvdata *drvdata;
struct skcipher_alg skcipher_alg;
struct aead_alg aead_alg;
};
struct cc_alg_template {