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* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/crypto.h>
#include <linux/version.h>
#include <crypto/algapi.h>
#include <crypto/internal/aead.h>
#include <crypto/hash.h>
#include <crypto/authenc.h>
#include <crypto/scatterwalk.h>
#include <linux/dmapool.h>
#include <linux/dma-mapping.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "ssi_buffer_mgr.h"
#include "cc_lli_defs.h"
#include "ssi_cipher.h"
#include "ssi_hash.h"
#include "ssi_aead.h"
#ifdef CC_DEBUG
#define GET_DMA_BUFFER_TYPE(buff_type) ( \
((buff_type) == SSI_DMA_BUF_NULL) ? "BUF_NULL" : \
((buff_type) == SSI_DMA_BUF_DLLI) ? "BUF_DLLI" : \
((buff_type) == SSI_DMA_BUF_MLLI) ? "BUF_MLLI" : "BUF_INVALID")
#else
#define GET_DMA_BUFFER_TYPE(buff_type)
#endif
enum dma_buffer_type {
DMA_NULL_TYPE = -1,
DMA_SGL_TYPE = 1,
DMA_BUFF_TYPE = 2,
};
struct buff_mgr_handle {
struct dma_pool *mlli_buffs_pool;
};
union buffer_array_entry {
struct scatterlist *sgl;
dma_addr_t buffer_dma;
};
struct buffer_array {
unsigned int num_of_buffers;
union buffer_array_entry entry[MAX_NUM_OF_BUFFERS_IN_MLLI];
unsigned int offset[MAX_NUM_OF_BUFFERS_IN_MLLI];
int nents[MAX_NUM_OF_BUFFERS_IN_MLLI];
int total_data_len[MAX_NUM_OF_BUFFERS_IN_MLLI];
enum dma_buffer_type type[MAX_NUM_OF_BUFFERS_IN_MLLI];
bool is_last[MAX_NUM_OF_BUFFERS_IN_MLLI];
u32 *mlli_nents[MAX_NUM_OF_BUFFERS_IN_MLLI];
};
/**
* ssi_buffer_mgr_get_sgl_nents() - Get scatterlist number of entries.
*
* @sg_list: SG list
* @nbytes: [IN] Total SGL data bytes.
* @lbytes: [OUT] Returns the amount of bytes at the last entry
*/
static unsigned int ssi_buffer_mgr_get_sgl_nents(
struct scatterlist *sg_list, unsigned int nbytes, u32 *lbytes, bool *is_chained)
{
unsigned int nents = 0;
while (nbytes != 0) {
if (sg_is_chain(sg_list)) {
SSI_LOG_ERR("Unexpected chained entry "
"in sg (entry =0x%X)\n", nents);
BUG();
}
if (sg_list->length != 0) {
nents++;
/* get the number of bytes in the last entry */
*lbytes = nbytes;
nbytes -= (sg_list->length > nbytes) ? nbytes : sg_list->length;
sg_list = sg_next(sg_list);
} else {
sg_list = (struct scatterlist *)sg_page(sg_list);
if (is_chained)
*is_chained = true;
}
}
SSI_LOG_DEBUG("nents %d last bytes %d\n", nents, *lbytes);
return nents;
}
/**
* ssi_buffer_mgr_zero_sgl() - Zero scatter scatter list data.
*
* @sgl:
*/
void ssi_buffer_mgr_zero_sgl(struct scatterlist *sgl, u32 data_len)
{
struct scatterlist *current_sg = sgl;
int sg_index = 0;
while (sg_index <= data_len) {
if (!current_sg) {
/* reached the end of the sgl --> just return back */
return;
}
memset(sg_virt(current_sg), 0, current_sg->length);
sg_index += current_sg->length;
current_sg = sg_next(current_sg);
}
}
/**
* ssi_buffer_mgr_copy_scatterlist_portion() - Copy scatter list data,
* from to_skip to end, to dest and vice versa
*
* @dest:
* @sg:
* @to_skip:
* @end:
* @direct:
*/
void ssi_buffer_mgr_copy_scatterlist_portion(
u8 *dest, struct scatterlist *sg,
u32 to_skip, u32 end,
enum ssi_sg_cpy_direct direct)
{
u32 nents, lbytes;
nents = ssi_buffer_mgr_get_sgl_nents(sg, end, &lbytes, NULL);
sg_copy_buffer(sg, nents, (void *)dest, (end - to_skip + 1), to_skip,
(direct == SSI_SG_TO_BUF));
}
static inline int ssi_buffer_mgr_render_buff_to_mlli(
dma_addr_t buff_dma, u32 buff_size, u32 *curr_nents,
u32 **mlli_entry_pp)
{
u32 *mlli_entry_p = *mlli_entry_pp;
u32 new_nents;;
/* Verify there is no memory overflow*/
new_nents = (*curr_nents + buff_size / CC_MAX_MLLI_ENTRY_SIZE + 1);
if (new_nents > MAX_NUM_OF_TOTAL_MLLI_ENTRIES)
return -ENOMEM;
/*handle buffer longer than 64 kbytes */
while (buff_size > CC_MAX_MLLI_ENTRY_SIZE) {
cc_lli_set_addr(mlli_entry_p, buff_dma);
cc_lli_set_size(mlli_entry_p, CC_MAX_MLLI_ENTRY_SIZE);
SSI_LOG_DEBUG("entry[%d]: single_buff=0x%08X size=%08X\n", *curr_nents,
mlli_entry_p[LLI_WORD0_OFFSET],
mlli_entry_p[LLI_WORD1_OFFSET]);
buff_dma += CC_MAX_MLLI_ENTRY_SIZE;
buff_size -= CC_MAX_MLLI_ENTRY_SIZE;
mlli_entry_p = mlli_entry_p + 2;
(*curr_nents)++;
}
/*Last entry */
cc_lli_set_addr(mlli_entry_p, buff_dma);
cc_lli_set_size(mlli_entry_p, buff_size);
SSI_LOG_DEBUG("entry[%d]: single_buff=0x%08X size=%08X\n", *curr_nents,
mlli_entry_p[LLI_WORD0_OFFSET],
mlli_entry_p[LLI_WORD1_OFFSET]);
mlli_entry_p = mlli_entry_p + 2;
*mlli_entry_pp = mlli_entry_p;
(*curr_nents)++;
return 0;
}
static inline int ssi_buffer_mgr_render_scatterlist_to_mlli(
struct scatterlist *sgl, u32 sgl_data_len, u32 sglOffset, u32 *curr_nents,
u32 **mlli_entry_pp)
{
struct scatterlist *curr_sgl = sgl;
u32 *mlli_entry_p = *mlli_entry_pp;
s32 rc = 0;
for ( ; (curr_sgl) && (sgl_data_len != 0);
curr_sgl = sg_next(curr_sgl)) {
u32 entry_data_len =
(sgl_data_len > sg_dma_len(curr_sgl) - sglOffset) ?
sg_dma_len(curr_sgl) - sglOffset : sgl_data_len;
sgl_data_len -= entry_data_len;
rc = ssi_buffer_mgr_render_buff_to_mlli(
sg_dma_address(curr_sgl) + sglOffset, entry_data_len, curr_nents,
&mlli_entry_p);
if (rc != 0)
return rc;
sglOffset = 0;
}
*mlli_entry_pp = mlli_entry_p;
return 0;
}
static int ssi_buffer_mgr_generate_mlli(
struct device *dev,
struct buffer_array *sg_data,
struct mlli_params *mlli_params)
{
u32 *mlli_p;
u32 total_nents = 0, prev_total_nents = 0;
int rc = 0, i;
SSI_LOG_DEBUG("NUM of SG's = %d\n", sg_data->num_of_buffers);
/* Allocate memory from the pointed pool */
mlli_params->mlli_virt_addr = dma_pool_alloc(
mlli_params->curr_pool, GFP_KERNEL,
&(mlli_params->mlli_dma_addr));
if (unlikely(!mlli_params->mlli_virt_addr)) {
SSI_LOG_ERR("dma_pool_alloc() failed\n");
rc = -ENOMEM;
goto build_mlli_exit;
}
/* Point to start of MLLI */
mlli_p = (u32 *)mlli_params->mlli_virt_addr;
/* go over all SG's and link it to one MLLI table */
for (i = 0; i < sg_data->num_of_buffers; i++) {
if (sg_data->type[i] == DMA_SGL_TYPE)
rc = ssi_buffer_mgr_render_scatterlist_to_mlli(
sg_data->entry[i].sgl,
sg_data->total_data_len[i], sg_data->offset[i], &total_nents,
&mlli_p);
else /*DMA_BUFF_TYPE*/
rc = ssi_buffer_mgr_render_buff_to_mlli(
sg_data->entry[i].buffer_dma,
sg_data->total_data_len[i], &total_nents,
&mlli_p);
if (rc != 0)
return rc;
/* set last bit in the current table */
if (sg_data->mlli_nents[i]) {
/*Calculate the current MLLI table length for the
*length field in the descriptor
*/
*(sg_data->mlli_nents[i]) +=
(total_nents - prev_total_nents);
prev_total_nents = total_nents;
}
}
/* Set MLLI size for the bypass operation */
mlli_params->mlli_len = (total_nents * LLI_ENTRY_BYTE_SIZE);
SSI_LOG_DEBUG("MLLI params: "
"virt_addr=%pK dma_addr=0x%llX mlli_len=0x%X\n",
mlli_params->mlli_virt_addr,
(unsigned long long)mlli_params->mlli_dma_addr,
mlli_params->mlli_len);
build_mlli_exit:
return rc;
}
static inline void ssi_buffer_mgr_add_buffer_entry(
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;
SSI_LOG_DEBUG("index=%u single_buff=0x%llX "
"buffer_len=0x%08X is_last=%d\n",
index, (unsigned long long)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 inline void ssi_buffer_mgr_add_scatterlist_entry(
struct buffer_array *sgl_data,
unsigned int nents,
struct scatterlist *sgl,
unsigned int data_len,
unsigned int data_offset,
bool is_last_table,
u32 *mlli_nents)
{
unsigned int index = sgl_data->num_of_buffers;
SSI_LOG_DEBUG("index=%u nents=%u sgl=%pK data_len=0x%08X is_last=%d\n",
index, nents, sgl, data_len, is_last_table);
sgl_data->nents[index] = nents;
sgl_data->entry[index].sgl = sgl;
sgl_data->offset[index] = data_offset;
sgl_data->total_data_len[index] = data_len;
sgl_data->type[index] = DMA_SGL_TYPE;
sgl_data->is_last[index] = is_last_table;
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 int
ssi_buffer_mgr_dma_map_sg(struct device *dev, struct scatterlist *sg, u32 nents,
enum dma_data_direction direction)
{
u32 i, j;
struct scatterlist *l_sg = sg;
for (i = 0; i < nents; i++) {
if (!l_sg)
break;
if (unlikely(dma_map_sg(dev, l_sg, 1, direction) != 1)) {
SSI_LOG_ERR("dma_map_page() sg buffer failed\n");
goto err;
}
l_sg = sg_next(l_sg);
}
return nents;
err:
/* Restore mapped parts */
for (j = 0; j < i; j++) {
if (!sg)
break;
dma_unmap_sg(dev, sg, 1, direction);
sg = sg_next(sg);
}
return 0;
}
static int ssi_buffer_mgr_map_scatterlist(
struct device *dev, struct scatterlist *sg,
unsigned int nbytes, int direction,
u32 *nents, u32 max_sg_nents,
u32 *lbytes, u32 *mapped_nents)
{
bool is_chained = false;
if (sg_is_last(sg)) {
/* One entry only case -set to DLLI */
if (unlikely(dma_map_sg(dev, sg, 1, direction) != 1)) {
SSI_LOG_ERR("dma_map_sg() single buffer failed\n");
return -ENOMEM;
}
SSI_LOG_DEBUG("Mapped sg: dma_address=0x%llX "
"page=%p addr=%pK offset=%u "
"length=%u\n",
(unsigned long long)sg_dma_address(sg),
sg_page(sg),
sg_virt(sg),
sg->offset, sg->length);
*lbytes = nbytes;
*nents = 1;
*mapped_nents = 1;
} else { /*sg_is_last*/
*nents = ssi_buffer_mgr_get_sgl_nents(sg, nbytes, lbytes,
&is_chained);
if (*nents > max_sg_nents) {
*nents = 0;
SSI_LOG_ERR("Too many fragments. current %d max %d\n",
*nents, max_sg_nents);
return -ENOMEM;
}
if (!is_chained) {
/* In case of mmu the number of mapped nents might
* be changed from the original sgl nents
*/
*mapped_nents = dma_map_sg(dev, sg, *nents, direction);
if (unlikely(*mapped_nents == 0)) {
*nents = 0;
SSI_LOG_ERR("dma_map_sg() sg buffer failed\n");
return -ENOMEM;
}
} else {
/*In this case the driver maps entry by entry so it
* must have the same nents before and after map
*/
*mapped_nents = ssi_buffer_mgr_dma_map_sg(dev,
sg,
*nents,
direction);
if (unlikely(*mapped_nents != *nents)) {
*nents = *mapped_nents;
SSI_LOG_ERR("dma_map_sg() sg buffer failed\n");
return -ENOMEM;
}
}
}
return 0;
}
static inline int
ssi_aead_handle_config_buf(struct device *dev,
struct aead_req_ctx *areq_ctx,
u8 *config_data,
struct buffer_array *sg_data,
unsigned int assoclen)
{
SSI_LOG_DEBUG(" 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 (unlikely(dma_map_sg(dev, &areq_ctx->ccm_adata_sg, 1,
DMA_TO_DEVICE) != 1)) {
SSI_LOG_ERR("dma_map_sg() "
"config buffer failed\n");
return -ENOMEM;
}
SSI_LOG_DEBUG("Mapped curr_buff: dma_address=0x%llX "
"page=%p addr=%pK "
"offset=%u length=%u\n",
(unsigned long long)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) {
ssi_buffer_mgr_add_scatterlist_entry(sg_data, 1,
&areq_ctx->ccm_adata_sg,
(AES_BLOCK_SIZE +
areq_ctx->ccm_hdr_size), 0,
false, NULL);
}
return 0;
}
static inline int ssi_ahash_handle_curr_buf(struct device *dev,
struct ahash_req_ctx *areq_ctx,
u8 *curr_buff,
u32 curr_buff_cnt,
struct buffer_array *sg_data)
{
SSI_LOG_DEBUG(" handle curr buff %x set to DLLI\n", curr_buff_cnt);
/* create sg for the current buffer */
sg_init_one(areq_ctx->buff_sg, curr_buff, curr_buff_cnt);
if (unlikely(dma_map_sg(dev, areq_ctx->buff_sg, 1,
DMA_TO_DEVICE) != 1)) {
SSI_LOG_ERR("dma_map_sg() "
"src buffer failed\n");
return -ENOMEM;
}
SSI_LOG_DEBUG("Mapped curr_buff: dma_address=0x%llX "
"page=%p addr=%pK "
"offset=%u length=%u\n",
(unsigned long long)sg_dma_address(areq_ctx->buff_sg),
sg_page(areq_ctx->buff_sg),
sg_virt(areq_ctx->buff_sg),
areq_ctx->buff_sg->offset,
areq_ctx->buff_sg->length);
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_DLLI;
areq_ctx->curr_sg = areq_ctx->buff_sg;
areq_ctx->in_nents = 0;
/* prepare for case of MLLI */
ssi_buffer_mgr_add_scatterlist_entry(sg_data, 1, areq_ctx->buff_sg,
curr_buff_cnt, 0, false, NULL);
return 0;
}
void ssi_buffer_mgr_unmap_blkcipher_request(
struct device *dev,
void *ctx,
unsigned int ivsize,
struct scatterlist *src,
struct scatterlist *dst)
{
struct blkcipher_req_ctx *req_ctx = (struct blkcipher_req_ctx *)ctx;
if (likely(req_ctx->gen_ctx.iv_dma_addr != 0)) {
SSI_LOG_DEBUG("Unmapped iv: iv_dma_addr=0x%llX iv_size=%u\n",
(unsigned long long)req_ctx->gen_ctx.iv_dma_addr,
ivsize);
dma_unmap_single(dev, req_ctx->gen_ctx.iv_dma_addr,
ivsize,
req_ctx->is_giv ? DMA_BIDIRECTIONAL :
DMA_TO_DEVICE);
}
/* Release pool */
if (req_ctx->dma_buf_type == SSI_DMA_BUF_MLLI) {
dma_pool_free(req_ctx->mlli_params.curr_pool,
req_ctx->mlli_params.mlli_virt_addr,
req_ctx->mlli_params.mlli_dma_addr);
}
dma_unmap_sg(dev, src, req_ctx->in_nents,
DMA_BIDIRECTIONAL);
SSI_LOG_DEBUG("Unmapped req->src=%pK\n",
sg_virt(src));
if (src != dst) {
dma_unmap_sg(dev, dst, req_ctx->out_nents,
DMA_BIDIRECTIONAL);
SSI_LOG_DEBUG("Unmapped req->dst=%pK\n",
sg_virt(dst));
}
}
int ssi_buffer_mgr_map_blkcipher_request(
struct ssi_drvdata *drvdata,
void *ctx,
unsigned int ivsize,
unsigned int nbytes,
void *info,
struct scatterlist *src,
struct scatterlist *dst)
{
struct blkcipher_req_ctx *req_ctx = (struct blkcipher_req_ctx *)ctx;
struct mlli_params *mlli_params = &req_ctx->mlli_params;
struct buff_mgr_handle *buff_mgr = drvdata->buff_mgr_handle;
struct device *dev = &drvdata->plat_dev->dev;
struct buffer_array sg_data;
u32 dummy = 0;
int rc = 0;
u32 mapped_nents = 0;
req_ctx->dma_buf_type = SSI_DMA_BUF_DLLI;
mlli_params->curr_pool = NULL;
sg_data.num_of_buffers = 0;
/* Map IV buffer */
if (likely(ivsize != 0)) {
dump_byte_array("iv", (u8 *)info, ivsize);
req_ctx->gen_ctx.iv_dma_addr =
dma_map_single(dev, (void *)info,
ivsize,
req_ctx->is_giv ? DMA_BIDIRECTIONAL :
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev,
req_ctx->gen_ctx.iv_dma_addr))) {
SSI_LOG_ERR("Mapping iv %u B at va=%pK "
"for DMA failed\n", ivsize, info);
return -ENOMEM;
}
SSI_LOG_DEBUG("Mapped iv %u B at va=%pK to dma=0x%llX\n",
ivsize, info,
(unsigned long long)req_ctx->gen_ctx.iv_dma_addr);
} else {
req_ctx->gen_ctx.iv_dma_addr = 0;
}
/* Map the src SGL */
rc = ssi_buffer_mgr_map_scatterlist(dev, src,
nbytes, DMA_BIDIRECTIONAL, &req_ctx->in_nents,
LLI_MAX_NUM_OF_DATA_ENTRIES, &dummy, &mapped_nents);
if (unlikely(rc != 0)) {
rc = -ENOMEM;
goto ablkcipher_exit;
}
if (mapped_nents > 1)
req_ctx->dma_buf_type = SSI_DMA_BUF_MLLI;
if (unlikely(src == dst)) {
/* Handle inplace operation */
if (unlikely(req_ctx->dma_buf_type == SSI_DMA_BUF_MLLI)) {
req_ctx->out_nents = 0;
ssi_buffer_mgr_add_scatterlist_entry(&sg_data,
req_ctx->in_nents, src,
nbytes, 0, true, &req_ctx->in_mlli_nents);
}
} else {
/* Map the dst sg */
if (unlikely(ssi_buffer_mgr_map_scatterlist(
dev, dst, nbytes,
DMA_BIDIRECTIONAL, &req_ctx->out_nents,
LLI_MAX_NUM_OF_DATA_ENTRIES, &dummy,
&mapped_nents))){
rc = -ENOMEM;
goto ablkcipher_exit;
}
if (mapped_nents > 1)
req_ctx->dma_buf_type = SSI_DMA_BUF_MLLI;
if (unlikely((req_ctx->dma_buf_type == SSI_DMA_BUF_MLLI))) {
ssi_buffer_mgr_add_scatterlist_entry(&sg_data,
req_ctx->in_nents, src,
nbytes, 0, true,
&req_ctx->in_mlli_nents);
ssi_buffer_mgr_add_scatterlist_entry(&sg_data,
req_ctx->out_nents, dst,
nbytes, 0, true,
&req_ctx->out_mlli_nents);
}
}
if (unlikely(req_ctx->dma_buf_type == SSI_DMA_BUF_MLLI)) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
rc = ssi_buffer_mgr_generate_mlli(dev, &sg_data, mlli_params);
if (unlikely(rc != 0))
goto ablkcipher_exit;
}
SSI_LOG_DEBUG("areq_ctx->dma_buf_type = %s\n",
GET_DMA_BUFFER_TYPE(req_ctx->dma_buf_type));
return 0;
ablkcipher_exit:
ssi_buffer_mgr_unmap_blkcipher_request(dev, req_ctx, ivsize, src, dst);
return rc;
}
void ssi_buffer_mgr_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 ssi_drvdata *drvdata = dev_get_drvdata(dev);
u32 dummy;
bool chained;
u32 size_to_unmap = 0;
if (areq_ctx->mac_buf_dma_addr != 0) {
dma_unmap_single(dev, areq_ctx->mac_buf_dma_addr,
MAX_MAC_SIZE, DMA_BIDIRECTIONAL);
}
#if SSI_CC_HAS_AES_GCM
if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
if (areq_ctx->hkey_dma_addr != 0) {
dma_unmap_single(dev, areq_ctx->hkey_dma_addr,
AES_BLOCK_SIZE, DMA_BIDIRECTIONAL);
}
if (areq_ctx->gcm_block_len_dma_addr != 0) {
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 != 0) {
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 != 0) {
dma_unmap_single(dev, areq_ctx->gcm_iv_inc2_dma_addr,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
}
}
#endif
if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
if (areq_ctx->ccm_iv0_dma_addr != 0) {
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 != 0) {
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) {
SSI_LOG_DEBUG("free MLLI buffer: dma=0x%08llX virt=%pK\n",
(unsigned long long)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);
}
SSI_LOG_DEBUG("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, ssi_buffer_mgr_get_sgl_nents(req->src, size_to_unmap, &dummy, &chained), DMA_BIDIRECTIONAL);
if (unlikely(req->src != req->dst)) {
SSI_LOG_DEBUG("Unmapping dst sgl: req->dst=%pK\n",
sg_virt(req->dst));
dma_unmap_sg(dev, req->dst, ssi_buffer_mgr_get_sgl_nents(req->dst, size_to_unmap, &dummy, &chained),
DMA_BIDIRECTIONAL);
}
if (drvdata->coherent &&
(areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) &&
likely(req->src == req->dst))
{
u32 size_to_skip = req->assoclen;
if (areq_ctx->is_gcm4543)
size_to_skip += crypto_aead_ivsize(tfm);
/* copy mac to a temporary location to deal with possible
* data memory overriding that caused by cache coherence problem.
*/
ssi_buffer_mgr_copy_scatterlist_portion(
areq_ctx->backup_mac, req->src,
size_to_skip + req->cryptlen - areq_ctx->req_authsize,
size_to_skip + req->cryptlen, SSI_SG_FROM_BUF);
}
}
static inline int ssi_buffer_mgr_get_aead_icv_nents(
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) {
nents = 0; /* ICV attached to data in last entry (not fragmented!) */
*is_icv_fragmented = false;
} else if (last_entry_data_size == authsize) {
nents = 1; /* ICV placed in whole last entry (not fragmented!) */
*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 {
SSI_LOG_ERR("Unsupported num. of ICV fragments (> %d)\n",
MAX_ICV_NENTS_SUPPORTED);
nents = -1; /*unsupported*/
}
SSI_LOG_DEBUG("is_frag=%s icv_nents=%u\n",
(*is_icv_fragmented ? "true" : "false"), nents);
return nents;
}
static inline int ssi_buffer_mgr_aead_chain_iv(
struct ssi_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->plat_dev->dev;
int rc = 0;
if (unlikely(!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 (unlikely(dma_mapping_error(dev, areq_ctx->gen_ctx.iv_dma_addr))) {
SSI_LOG_ERR("Mapping iv %u B at va=%pK for DMA failed\n",
hw_iv_size, req->iv);
rc = -ENOMEM;
goto chain_iv_exit;
}
SSI_LOG_DEBUG("Mapped iv %u B at va=%pK to dma=0x%llX\n",
hw_iv_size, req->iv,
(unsigned long long)areq_ctx->gen_ctx.iv_dma_addr);
if (do_chain && areq_ctx->plaintext_authenticate_only) { // TODO: what about CTR?? ask Ron
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 */
ssi_buffer_mgr_add_buffer_entry(
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 = SSI_DMA_BUF_MLLI;
}
chain_iv_exit:
return rc;
}
static inline int ssi_buffer_mgr_aead_chain_assoc(
struct ssi_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;
if (areq_ctx->is_gcm4543)
size_of_assoc += crypto_aead_ivsize(tfm);
if (!sg_data) {
rc = -EINVAL;
goto chain_assoc_exit;
}
if (unlikely(req->assoclen == 0)) {
areq_ctx->assoc_buff_type = SSI_DMA_BUF_NULL;
areq_ctx->assoc.nents = 0;
areq_ctx->assoc.mlli_nents = 0;
SSI_LOG_DEBUG("Chain assoc of length 0: buff_type=%s nents=%u\n",
GET_DMA_BUFFER_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;
if (sg_index > size_of_assoc) { //the first entry in the scatter list contains all the associated data
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) {
SSI_LOG_ERR("reached end of sg list. unexpected\n");
BUG();
}
sg_index += current_sg->length;
mapped_nents++;
}
}
if (unlikely(mapped_nents > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES)) {
SSI_LOG_ERR("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 (unlikely((mapped_nents + 1) >
LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES)) {
SSI_LOG_ERR("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 (likely(mapped_nents == 1) &&
(areq_ctx->ccm_hdr_size == ccm_header_size_null))
areq_ctx->assoc_buff_type = SSI_DMA_BUF_DLLI;
else
areq_ctx->assoc_buff_type = SSI_DMA_BUF_MLLI;
if (unlikely((do_chain) ||
(areq_ctx->assoc_buff_type == SSI_DMA_BUF_MLLI))) {
SSI_LOG_DEBUG("Chain assoc: buff_type=%s nents=%u\n",
GET_DMA_BUFFER_TYPE(areq_ctx->assoc_buff_type),
areq_ctx->assoc.nents);
ssi_buffer_mgr_add_scatterlist_entry(
sg_data, areq_ctx->assoc.nents,
req->src, req->assoclen, 0, is_last,
&areq_ctx->assoc.mlli_nents);
areq_ctx->assoc_buff_type = SSI_DMA_BUF_MLLI;
}
chain_assoc_exit:
return rc;
}
static inline void ssi_buffer_mgr_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 (likely(req->src == req->dst)) {
/*INPLACE*/
areq_ctx->icv_dma_addr = sg_dma_address(
areq_ctx->srcSgl) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(
areq_ctx->srcSgl) +
(*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->srcSgl) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(
areq_ctx->srcSgl) +
(*src_last_bytes - authsize);
} else {
/*NON-INPLACE and ENCRYPT*/
areq_ctx->icv_dma_addr = sg_dma_address(
areq_ctx->dstSgl) +
(*dst_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(
areq_ctx->dstSgl) +
(*dst_last_bytes - authsize);
}
}
static inline int ssi_buffer_mgr_prepare_aead_data_mlli(
struct ssi_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 crypto_aead *tfm = crypto_aead_reqtfm(req);
if (likely(req->src == req->dst)) {
/*INPLACE*/
ssi_buffer_mgr_add_scatterlist_entry(sg_data,
areq_ctx->src.nents, areq_ctx->srcSgl,
areq_ctx->cryptlen, areq_ctx->srcOffset, is_last_table,
&areq_ctx->src.mlli_nents);
icv_nents = ssi_buffer_mgr_get_aead_icv_nents(areq_ctx->srcSgl,
areq_ctx->src.nents, authsize, *src_last_bytes,
&areq_ctx->is_icv_fragmented);
if (unlikely(icv_nents < 0)) {
rc = -ENOTSUPP;
goto prepare_data_mlli_exit;
}
if (unlikely(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) {
if (!drvdata->coherent) {
/* In coherent platforms (e.g. ACP)
* already copying ICV for any
* INPLACE-DECRYPT operation, hence
* we must neglect this code.
*/
u32 skip = req->assoclen;
if (areq_ctx->is_gcm4543)
skip += crypto_aead_ivsize(tfm);
ssi_buffer_mgr_copy_scatterlist_portion(
areq_ctx->backup_mac, req->src,
(skip + req->cryptlen -
areq_ctx->req_authsize),
skip + req->cryptlen,
SSI_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 */
/*Should hanlde if the sg is not contig.*/
areq_ctx->icv_dma_addr = sg_dma_address(
&areq_ctx->srcSgl[areq_ctx->src.nents - 1]) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(
&areq_ctx->srcSgl[areq_ctx->src.nents - 1]) +
(*src_last_bytes - authsize);
}
} else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
/*NON-INPLACE and DECRYPT*/
ssi_buffer_mgr_add_scatterlist_entry(sg_data,
areq_ctx->src.nents, areq_ctx->srcSgl,
areq_ctx->cryptlen, areq_ctx->srcOffset, is_last_table,
&areq_ctx->src.mlli_nents);
ssi_buffer_mgr_add_scatterlist_entry(sg_data,
areq_ctx->dst.nents, areq_ctx->dstSgl,
areq_ctx->cryptlen, areq_ctx->dstOffset, is_last_table,
&areq_ctx->dst.mlli_nents);
icv_nents = ssi_buffer_mgr_get_aead_icv_nents(areq_ctx->srcSgl,
areq_ctx->src.nents, authsize, *src_last_bytes,
&areq_ctx->is_icv_fragmented);
if (unlikely(icv_nents < 0)) {
rc = -ENOTSUPP;
goto prepare_data_mlli_exit;
}
if (unlikely(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
*/
u32 size_to_skip = req->assoclen;
if (areq_ctx->is_gcm4543)
size_to_skip += crypto_aead_ivsize(tfm);
ssi_buffer_mgr_copy_scatterlist_portion(
areq_ctx->backup_mac, req->src,
size_to_skip + req->cryptlen - areq_ctx->req_authsize,
size_to_skip + req->cryptlen, SSI_SG_TO_BUF);
areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
} else { /* Contig. ICV */
/*Should hanlde if the sg is not contig.*/
areq_ctx->icv_dma_addr = sg_dma_address(
&areq_ctx->srcSgl[areq_ctx->src.nents - 1]) +
(*src_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(
&areq_ctx->srcSgl[areq_ctx->src.nents - 1]) +
(*src_last_bytes - authsize);
}
} else {
/*NON-INPLACE and ENCRYPT*/
ssi_buffer_mgr_add_scatterlist_entry(sg_data,
areq_ctx->dst.nents, areq_ctx->dstSgl,
areq_ctx->cryptlen, areq_ctx->dstOffset, is_last_table,
&areq_ctx->dst.mlli_nents);
ssi_buffer_mgr_add_scatterlist_entry(sg_data,
areq_ctx->src.nents, areq_ctx->srcSgl,
areq_ctx->cryptlen, areq_ctx->srcOffset, is_last_table,
&areq_ctx->src.mlli_nents);
icv_nents = ssi_buffer_mgr_get_aead_icv_nents(areq_ctx->dstSgl,
areq_ctx->dst.nents, authsize, *dst_last_bytes,
&areq_ctx->is_icv_fragmented);
if (unlikely(icv_nents < 0)) {
rc = -ENOTSUPP;
goto prepare_data_mlli_exit;
}
if (likely(!areq_ctx->is_icv_fragmented)) {
/* Contig. ICV */
areq_ctx->icv_dma_addr = sg_dma_address(
&areq_ctx->dstSgl[areq_ctx->dst.nents - 1]) +
(*dst_last_bytes - authsize);
areq_ctx->icv_virt_addr = sg_virt(
&areq_ctx->dstSgl[areq_ctx->dst.nents - 1]) +
(*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 inline int ssi_buffer_mgr_aead_chain_data(
struct ssi_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->plat_dev->dev;
enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
unsigned int authsize = areq_ctx->req_authsize;
int src_last_bytes = 0, dst_last_bytes = 0;
int rc = 0;
u32 src_mapped_nents = 0, dst_mapped_nents = 0;
u32 offset = 0;
unsigned int size_for_map = req->assoclen + req->cryptlen; /*non-inplace mode*/
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) {
rc = -EINVAL;
goto chain_data_exit;
}
areq_ctx->srcSgl = req->src;
areq_ctx->dstSgl = 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 = ssi_buffer_mgr_get_sgl_nents(req->src, size_for_map, &src_last_bytes, &chained);
sg_index = areq_ctx->srcSgl->length;
//check where the data starts
while (sg_index <= size_to_skip) {
offset -= areq_ctx->srcSgl->length;
areq_ctx->srcSgl = sg_next(areq_ctx->srcSgl);
//if have reached the end of the sgl, then this is unexpected
if (!areq_ctx->srcSgl) {
SSI_LOG_ERR("reached end of sg list. unexpected\n");
BUG();
}
sg_index += areq_ctx->srcSgl->length;
src_mapped_nents--;
}
if (unlikely(src_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES))
{
SSI_LOG_ERR("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->srcOffset = 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 = ssi_buffer_mgr_map_scatterlist(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 (unlikely(rc != 0)) {
rc = -ENOMEM;
goto chain_data_exit;
}
}
dst_mapped_nents = ssi_buffer_mgr_get_sgl_nents(req->dst, size_for_map, &dst_last_bytes, &chained);
sg_index = areq_ctx->dstSgl->length;
offset = size_to_skip;
//check where the data starts
while (sg_index <= size_to_skip) {
offset -= areq_ctx->dstSgl->length;
areq_ctx->dstSgl = sg_next(areq_ctx->dstSgl);
//if have reached the end of the sgl, then this is unexpected
if (!areq_ctx->dstSgl) {
SSI_LOG_ERR("reached end of sg list. unexpected\n");
BUG();
}
sg_index += areq_ctx->dstSgl->length;
dst_mapped_nents--;
}
if (unlikely(dst_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES))
{
SSI_LOG_ERR("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->dstOffset = offset;
if ((src_mapped_nents > 1) ||
(dst_mapped_nents > 1) ||
do_chain) {
areq_ctx->data_buff_type = SSI_DMA_BUF_MLLI;
rc = ssi_buffer_mgr_prepare_aead_data_mlli(drvdata, req, sg_data,
&src_last_bytes, &dst_last_bytes, is_last_table);
} else {
areq_ctx->data_buff_type = SSI_DMA_BUF_DLLI;
ssi_buffer_mgr_prepare_aead_data_dlli(
req, &src_last_bytes, &dst_last_bytes);
}
chain_data_exit:
return rc;
}
static void ssi_buffer_mgr_update_aead_mlli_nents(struct ssi_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 == SSI_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 == SSI_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 ssi_buffer_mgr_map_aead_request(
struct ssi_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->plat_dev->dev;
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;
u32 mapped_nents = 0;
u32 dummy = 0; /*used for the assoc data fragments */
u32 size_to_map = 0;
mlli_params->curr_pool = NULL;
sg_data.num_of_buffers = 0;
if (drvdata->coherent &&
(areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) &&
likely(req->src == req->dst))
{
u32 size_to_skip = req->assoclen;
if (is_gcm4543)
size_to_skip += crypto_aead_ivsize(tfm);
/* copy mac to a temporary location to deal with possible
* data memory overriding that caused by cache coherence problem.
*/
ssi_buffer_mgr_copy_scatterlist_portion(
areq_ctx->backup_mac, req->src,
size_to_skip + req->cryptlen - areq_ctx->req_authsize,
size_to_skip + req->cryptlen, SSI_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);
areq_ctx->mac_buf_dma_addr = dma_map_single(dev,
areq_ctx->mac_buf, MAX_MAC_SIZE, DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(dev, areq_ctx->mac_buf_dma_addr))) {
SSI_LOG_ERR("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;
}
if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
areq_ctx->ccm_iv0_dma_addr = dma_map_single(dev,
(areq_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET),
AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev, areq_ctx->ccm_iv0_dma_addr))) {
SSI_LOG_ERR("Mapping mac_buf %u B at va=%pK "
"for DMA failed\n", AES_BLOCK_SIZE,
(areq_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET));
areq_ctx->ccm_iv0_dma_addr = 0;
rc = -ENOMEM;
goto aead_map_failure;
}
if (ssi_aead_handle_config_buf(dev, areq_ctx,
areq_ctx->ccm_config, &sg_data, req->assoclen) != 0) {
rc = -ENOMEM;
goto aead_map_failure;
}
}
#if SSI_CC_HAS_AES_GCM
if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
areq_ctx->hkey_dma_addr = dma_map_single(dev,
areq_ctx->hkey, AES_BLOCK_SIZE, DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(dev, areq_ctx->hkey_dma_addr))) {
SSI_LOG_ERR("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->gcm_block_len_dma_addr = dma_map_single(dev,
&areq_ctx->gcm_len_block, AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev, areq_ctx->gcm_block_len_dma_addr))) {
SSI_LOG_ERR("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_iv_inc1_dma_addr = dma_map_single(dev,
areq_ctx->gcm_iv_inc1,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev, areq_ctx->gcm_iv_inc1_dma_addr))) {
SSI_LOG_ERR("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_inc2_dma_addr = dma_map_single(dev,
areq_ctx->gcm_iv_inc2,
AES_BLOCK_SIZE, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev, areq_ctx->gcm_iv_inc2_dma_addr))) {
SSI_LOG_ERR("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;
}
}
#endif /*SSI_CC_HAS_AES_GCM*/
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 = ssi_buffer_mgr_map_scatterlist(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 (unlikely(rc != 0)) {
rc = -ENOMEM;
goto aead_map_failure;
}
if (likely(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 = ssi_buffer_mgr_aead_chain_assoc(drvdata, req, &sg_data, true, false);
if (unlikely(rc != 0))
goto aead_map_failure;
rc = ssi_buffer_mgr_aead_chain_iv(drvdata, req, &sg_data, true, false);
if (unlikely(rc != 0))
goto aead_map_failure;
rc = ssi_buffer_mgr_aead_chain_data(drvdata, req, &sg_data, true, false);
if (unlikely(rc != 0))
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 = ssi_buffer_mgr_aead_chain_assoc(drvdata, req, &sg_data, false, true);
if (unlikely(rc != 0))
goto aead_map_failure;
rc = ssi_buffer_mgr_aead_chain_iv(drvdata, req, &sg_data, false, true);
if (unlikely(rc != 0))
goto aead_map_failure;
rc = ssi_buffer_mgr_aead_chain_data(drvdata, req, &sg_data, true, true);
if (unlikely(rc != 0))
goto aead_map_failure;
}
/* Mlli support -start building the MLLI according to the above results */
if (unlikely(
(areq_ctx->assoc_buff_type == SSI_DMA_BUF_MLLI) ||
(areq_ctx->data_buff_type == SSI_DMA_BUF_MLLI))) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
rc = ssi_buffer_mgr_generate_mlli(dev, &sg_data, mlli_params);
if (unlikely(rc != 0))
goto aead_map_failure;
ssi_buffer_mgr_update_aead_mlli_nents(drvdata, req);
SSI_LOG_DEBUG("assoc params mn %d\n", areq_ctx->assoc.mlli_nents);
SSI_LOG_DEBUG("src params mn %d\n", areq_ctx->src.mlli_nents);
SSI_LOG_DEBUG("dst params mn %d\n", areq_ctx->dst.mlli_nents);
}
return 0;
aead_map_failure:
ssi_buffer_mgr_unmap_aead_request(dev, req);
return rc;
}
int ssi_buffer_mgr_map_hash_request_final(
struct ssi_drvdata *drvdata, void *ctx, struct scatterlist *src, unsigned int nbytes, bool do_update)
{
struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
struct device *dev = &drvdata->plat_dev->dev;
u8 *curr_buff = areq_ctx->buff_index ? areq_ctx->buff1 :
areq_ctx->buff0;
u32 *curr_buff_cnt = areq_ctx->buff_index ? &areq_ctx->buff1_cnt :
&areq_ctx->buff0_cnt;
struct mlli_params *mlli_params = &areq_ctx->mlli_params;
struct buffer_array sg_data;
struct buff_mgr_handle *buff_mgr = drvdata->buff_mgr_handle;
u32 dummy = 0;
u32 mapped_nents = 0;
SSI_LOG_DEBUG(" final params : curr_buff=%pK "
"curr_buff_cnt=0x%X nbytes = 0x%X "
"src=%pK curr_index=%u\n",
curr_buff, *curr_buff_cnt, nbytes,
src, areq_ctx->buff_index);
/* Init the type of the dma buffer */
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_NULL;
mlli_params->curr_pool = NULL;
sg_data.num_of_buffers = 0;
areq_ctx->in_nents = 0;
if (unlikely(nbytes == 0 && *curr_buff_cnt == 0)) {
/* nothing to do */
return 0;
}
/*TODO: copy data in case that buffer is enough for operation */
/* map the previous buffer */
if (*curr_buff_cnt != 0) {
if (ssi_ahash_handle_curr_buf(dev, areq_ctx, curr_buff,
*curr_buff_cnt, &sg_data) != 0) {
return -ENOMEM;
}
}
if (src && (nbytes > 0) && do_update) {
if (unlikely(ssi_buffer_mgr_map_scatterlist(dev, src,
nbytes,
DMA_TO_DEVICE,
&areq_ctx->in_nents,
LLI_MAX_NUM_OF_DATA_ENTRIES,
&dummy, &mapped_nents))){
goto unmap_curr_buff;
}
if (src && (mapped_nents == 1)
&& (areq_ctx->data_dma_buf_type == SSI_DMA_BUF_NULL)) {
memcpy(areq_ctx->buff_sg, src,
sizeof(struct scatterlist));
areq_ctx->buff_sg->length = nbytes;
areq_ctx->curr_sg = areq_ctx->buff_sg;
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_DLLI;
} else {
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_MLLI;
}
}
/*build mlli */
if (unlikely(areq_ctx->data_dma_buf_type == SSI_DMA_BUF_MLLI)) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
/* add the src data to the sg_data */
ssi_buffer_mgr_add_scatterlist_entry(&sg_data,
areq_ctx->in_nents,
src,
nbytes, 0,
true, &areq_ctx->mlli_nents);
if (unlikely(ssi_buffer_mgr_generate_mlli(dev, &sg_data,
mlli_params) != 0)) {
goto fail_unmap_din;
}
}
/* change the buffer index for the unmap function */
areq_ctx->buff_index = (areq_ctx->buff_index ^ 1);
SSI_LOG_DEBUG("areq_ctx->data_dma_buf_type = %s\n",
GET_DMA_BUFFER_TYPE(areq_ctx->data_dma_buf_type));
return 0;
fail_unmap_din:
dma_unmap_sg(dev, src, areq_ctx->in_nents, DMA_TO_DEVICE);
unmap_curr_buff:
if (*curr_buff_cnt != 0)
dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
return -ENOMEM;
}
int ssi_buffer_mgr_map_hash_request_update(
struct ssi_drvdata *drvdata, void *ctx, struct scatterlist *src, unsigned int nbytes, unsigned int block_size)
{
struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
struct device *dev = &drvdata->plat_dev->dev;
u8 *curr_buff = areq_ctx->buff_index ? areq_ctx->buff1 :
areq_ctx->buff0;
u32 *curr_buff_cnt = areq_ctx->buff_index ? &areq_ctx->buff1_cnt :
&areq_ctx->buff0_cnt;
u8 *next_buff = areq_ctx->buff_index ? areq_ctx->buff0 :
areq_ctx->buff1;
u32 *next_buff_cnt = areq_ctx->buff_index ? &areq_ctx->buff0_cnt :
&areq_ctx->buff1_cnt;
struct mlli_params *mlli_params = &areq_ctx->mlli_params;
unsigned int update_data_len;
u32 total_in_len = nbytes + *curr_buff_cnt;
struct buffer_array sg_data;
struct buff_mgr_handle *buff_mgr = drvdata->buff_mgr_handle;
unsigned int swap_index = 0;
u32 dummy = 0;
u32 mapped_nents = 0;
SSI_LOG_DEBUG(" update params : curr_buff=%pK "
"curr_buff_cnt=0x%X nbytes=0x%X "
"src=%pK curr_index=%u\n",
curr_buff, *curr_buff_cnt, nbytes,
src, areq_ctx->buff_index);
/* Init the type of the dma buffer */
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_NULL;
mlli_params->curr_pool = NULL;
areq_ctx->curr_sg = NULL;
sg_data.num_of_buffers = 0;
areq_ctx->in_nents = 0;
if (unlikely(total_in_len < block_size)) {
SSI_LOG_DEBUG(" less than one block: curr_buff=%pK "
"*curr_buff_cnt=0x%X copy_to=%pK\n",
curr_buff, *curr_buff_cnt,
&curr_buff[*curr_buff_cnt]);
areq_ctx->in_nents =
ssi_buffer_mgr_get_sgl_nents(src,
nbytes,
&dummy, NULL);
sg_copy_to_buffer(src, areq_ctx->in_nents,
&curr_buff[*curr_buff_cnt], nbytes);
*curr_buff_cnt += nbytes;
return 1;
}
/* Calculate the residue size*/
*next_buff_cnt = total_in_len & (block_size - 1);
/* update data len */
update_data_len = total_in_len - *next_buff_cnt;
SSI_LOG_DEBUG(" temp length : *next_buff_cnt=0x%X "
"update_data_len=0x%X\n",
*next_buff_cnt, update_data_len);
/* Copy the new residue to next buffer */
if (*next_buff_cnt != 0) {
SSI_LOG_DEBUG(" handle residue: next buff %pK skip data %u"
" residue %u\n", next_buff,
(update_data_len - *curr_buff_cnt),
*next_buff_cnt);
ssi_buffer_mgr_copy_scatterlist_portion(next_buff, src,
(update_data_len - *curr_buff_cnt),
nbytes, SSI_SG_TO_BUF);
/* change the buffer index for next operation */
swap_index = 1;
}
if (*curr_buff_cnt != 0) {
if (ssi_ahash_handle_curr_buf(dev, areq_ctx, curr_buff,
*curr_buff_cnt, &sg_data) != 0) {
return -ENOMEM;
}
/* change the buffer index for next operation */
swap_index = 1;
}
if (update_data_len > *curr_buff_cnt) {
if (unlikely(ssi_buffer_mgr_map_scatterlist(dev, src,
(update_data_len - *curr_buff_cnt),
DMA_TO_DEVICE,
&areq_ctx->in_nents,
LLI_MAX_NUM_OF_DATA_ENTRIES,
&dummy, &mapped_nents))){
goto unmap_curr_buff;
}
if ((mapped_nents == 1)
&& (areq_ctx->data_dma_buf_type == SSI_DMA_BUF_NULL)) {
/* only one entry in the SG and no previous data */
memcpy(areq_ctx->buff_sg, src,
sizeof(struct scatterlist));
areq_ctx->buff_sg->length = update_data_len;
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_DLLI;
areq_ctx->curr_sg = areq_ctx->buff_sg;
} else {
areq_ctx->data_dma_buf_type = SSI_DMA_BUF_MLLI;
}
}
if (unlikely(areq_ctx->data_dma_buf_type == SSI_DMA_BUF_MLLI)) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
/* add the src data to the sg_data */
ssi_buffer_mgr_add_scatterlist_entry(&sg_data,
areq_ctx->in_nents,
src,
(update_data_len - *curr_buff_cnt), 0,
true, &areq_ctx->mlli_nents);
if (unlikely(ssi_buffer_mgr_generate_mlli(dev, &sg_data,
mlli_params) != 0)) {
goto fail_unmap_din;
}
}
areq_ctx->buff_index = (areq_ctx->buff_index ^ swap_index);
return 0;
fail_unmap_din:
dma_unmap_sg(dev, src, areq_ctx->in_nents, DMA_TO_DEVICE);
unmap_curr_buff:
if (*curr_buff_cnt != 0)
dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
return -ENOMEM;
}
void ssi_buffer_mgr_unmap_hash_request(
struct device *dev, void *ctx, struct scatterlist *src, bool do_revert)
{
struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
u32 *prev_len = areq_ctx->buff_index ? &areq_ctx->buff0_cnt :
&areq_ctx->buff1_cnt;
/*In case a pool was set, a table was
*allocated and should be released
*/
if (areq_ctx->mlli_params.curr_pool) {
SSI_LOG_DEBUG("free MLLI buffer: dma=0x%llX virt=%pK\n",
(unsigned long long)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);
}
if ((src) && likely(areq_ctx->in_nents != 0)) {
SSI_LOG_DEBUG("Unmapped sg src: virt=%pK dma=0x%llX len=0x%X\n",
sg_virt(src),
(unsigned long long)sg_dma_address(src),
sg_dma_len(src));
dma_unmap_sg(dev, src,
areq_ctx->in_nents, DMA_TO_DEVICE);
}
if (*prev_len != 0) {
SSI_LOG_DEBUG("Unmapped buffer: areq_ctx->buff_sg=%pK"
" dma=0x%llX len 0x%X\n",
sg_virt(areq_ctx->buff_sg),
(unsigned long long)sg_dma_address(areq_ctx->buff_sg),
sg_dma_len(areq_ctx->buff_sg));
dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
if (!do_revert) {
/* clean the previous data length for update operation */
*prev_len = 0;
} else {
areq_ctx->buff_index ^= 1;
}
}
}
int ssi_buffer_mgr_init(struct ssi_drvdata *drvdata)
{
struct buff_mgr_handle *buff_mgr_handle;
struct device *dev = &drvdata->plat_dev->dev;
buff_mgr_handle = (struct buff_mgr_handle *)
kmalloc(sizeof(struct buff_mgr_handle), GFP_KERNEL);
if (!buff_mgr_handle)
return -ENOMEM;
drvdata->buff_mgr_handle = buff_mgr_handle;
buff_mgr_handle->mlli_buffs_pool = dma_pool_create(
"dx_single_mlli_tables", dev,
MAX_NUM_OF_TOTAL_MLLI_ENTRIES *
LLI_ENTRY_BYTE_SIZE,
MLLI_TABLE_MIN_ALIGNMENT, 0);
if (unlikely(!buff_mgr_handle->mlli_buffs_pool))
goto error;
return 0;
error:
ssi_buffer_mgr_fini(drvdata);
return -ENOMEM;
}
int ssi_buffer_mgr_fini(struct ssi_drvdata *drvdata)
{
struct buff_mgr_handle *buff_mgr_handle = drvdata->buff_mgr_handle;
if (buff_mgr_handle) {
dma_pool_destroy(buff_mgr_handle->mlli_buffs_pool);
kfree(drvdata->buff_mgr_handle);
drvdata->buff_mgr_handle = NULL;
}
return 0;
}
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