diff options
Diffstat (limited to 'drivers/staging/ccree/ssi_buffer_mgr.c')
-rw-r--r-- | drivers/staging/ccree/ssi_buffer_mgr.c | 1798 |
1 files changed, 0 insertions, 1798 deletions
diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c deleted file mode 100644 index 63936091d524..000000000000 --- a/drivers/staging/ccree/ssi_buffer_mgr.c +++ /dev/null @@ -1,1798 +0,0 @@ -/* - * 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 sgl_offset, - 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) - sgl_offset) ? - sg_dma_len(curr_sgl) - sgl_offset : - sgl_data_len; - sgl_data_len -= entry_data_len; - rc = ssi_buffer_mgr_render_buff_to_mlli( - sg_dma_address(curr_sgl) + sgl_offset, entry_data_len, - curr_nents, &mlli_entry_p); - if (rc != 0) - return rc; - - sgl_offset = 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=%pad mlli_len=0x%X\n", - mlli_params->mlli_virt_addr, - 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=%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 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=%pad " - "page=%p addr=%pK offset=%u " - "length=%u\n", - 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=%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) { - 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=%pad " - "page=%p addr=%pK " - "offset=%u length=%u\n", - 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=%pad iv_size=%u\n", - 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=%pad\n", - ivsize, info, - 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=%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); - } - - 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=%pad\n", - hw_iv_size, req->iv, - 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->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 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->src_sgl, - areq_ctx->cryptlen, - areq_ctx->src_offset, - is_last_table, - &areq_ctx->src.mlli_nents); - - icv_nents = ssi_buffer_mgr_get_aead_icv_nents(areq_ctx->src_sgl, - 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->src_sgl[areq_ctx->src.nents - 1]) + - (*src_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt( - &areq_ctx->src_sgl[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->src_sgl, - areq_ctx->cryptlen, - areq_ctx->src_offset, - is_last_table, - &areq_ctx->src.mlli_nents); - ssi_buffer_mgr_add_scatterlist_entry(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 = ssi_buffer_mgr_get_aead_icv_nents(areq_ctx->src_sgl, - 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->src_sgl[areq_ctx->src.nents - 1]) + - (*src_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt( - &areq_ctx->src_sgl[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->dst_sgl, - areq_ctx->cryptlen, - areq_ctx->dst_offset, - is_last_table, - &areq_ctx->dst.mlli_nents); - ssi_buffer_mgr_add_scatterlist_entry(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 = ssi_buffer_mgr_get_aead_icv_nents(areq_ctx->dst_sgl, - 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->dst_sgl[areq_ctx->dst.nents - 1]) + - (*dst_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt( - &areq_ctx->dst_sgl[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->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 = ssi_buffer_mgr_get_sgl_nents(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) { - SSI_LOG_ERR("reached end of sg list. unexpected\n"); - BUG(); - } - sg_index += areq_ctx->src_sgl->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->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 = 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->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) { - SSI_LOG_ERR("reached end of sg list. unexpected\n"); - BUG(); - } - sg_index += areq_ctx->dst_sgl->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->dst_offset = 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=%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); - } - - if ((src) && likely(areq_ctx->in_nents != 0)) { - SSI_LOG_DEBUG("Unmapped sg src: virt=%pK dma=%pad len=0x%X\n", - sg_virt(src), - 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=%pad len 0x%X\n", - sg_virt(areq_ctx->buff_sg), - 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 = kmalloc(sizeof(*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; -} |