1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */
4 #include <crypto/internal/aead.h>
5 #include <crypto/authenc.h>
6 #include <crypto/scatterwalk.h>
7 #include <linux/dmapool.h>
8 #include <linux/dma-mapping.h>
10 #include "cc_buffer_mgr.h"
11 #include "cc_lli_defs.h"
12 #include "cc_cipher.h"
16 union buffer_array_entry {
17 struct scatterlist *sgl;
18 dma_addr_t buffer_dma;
22 unsigned int num_of_buffers;
23 union buffer_array_entry entry[MAX_NUM_OF_BUFFERS_IN_MLLI];
24 unsigned int offset[MAX_NUM_OF_BUFFERS_IN_MLLI];
25 int nents[MAX_NUM_OF_BUFFERS_IN_MLLI];
26 int total_data_len[MAX_NUM_OF_BUFFERS_IN_MLLI];
27 bool is_last[MAX_NUM_OF_BUFFERS_IN_MLLI];
28 u32 *mlli_nents[MAX_NUM_OF_BUFFERS_IN_MLLI];
31 static inline char *cc_dma_buf_type(enum cc_req_dma_buf_type type)
46 * cc_copy_mac() - Copy MAC to temporary location
49 * @req: aead request object
50 * @dir: [IN] copy from/to sgl
52 static void cc_copy_mac(struct device *dev, struct aead_request *req,
53 enum cc_sg_cpy_direct dir)
55 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
56 u32 skip = req->assoclen + req->cryptlen;
58 cc_copy_sg_portion(dev, areq_ctx->backup_mac, req->src,
59 (skip - areq_ctx->req_authsize), skip, dir);
63 * cc_get_sgl_nents() - Get scatterlist number of entries.
67 * @nbytes: [IN] Total SGL data bytes.
68 * @lbytes: [OUT] Returns the amount of bytes at the last entry
71 * Number of entries in the scatterlist
73 static unsigned int cc_get_sgl_nents(struct device *dev,
74 struct scatterlist *sg_list,
75 unsigned int nbytes, u32 *lbytes)
77 unsigned int nents = 0;
81 while (nbytes && sg_list) {
83 /* get the number of bytes in the last entry */
85 nbytes -= (sg_list->length > nbytes) ?
86 nbytes : sg_list->length;
87 sg_list = sg_next(sg_list);
90 dev_dbg(dev, "nents %d last bytes %d\n", nents, *lbytes);
95 * cc_copy_sg_portion() - Copy scatter list data,
96 * from to_skip to end, to dest and vice versa
99 * @dest: Buffer to copy to/from
101 * @to_skip: Number of bytes to skip before copying
102 * @end: Offset of last byte to copy
103 * @direct: Transfer direction (true == from SG list to buffer, false == from
106 void cc_copy_sg_portion(struct device *dev, u8 *dest, struct scatterlist *sg,
107 u32 to_skip, u32 end, enum cc_sg_cpy_direct direct)
111 nents = sg_nents_for_len(sg, end);
112 sg_copy_buffer(sg, nents, dest, (end - to_skip + 1), to_skip,
113 (direct == CC_SG_TO_BUF));
116 static int cc_render_buff_to_mlli(struct device *dev, dma_addr_t buff_dma,
117 u32 buff_size, u32 *curr_nents,
120 u32 *mlli_entry_p = *mlli_entry_pp;
123 /* Verify there is no memory overflow*/
124 new_nents = (*curr_nents + buff_size / CC_MAX_MLLI_ENTRY_SIZE + 1);
125 if (new_nents > MAX_NUM_OF_TOTAL_MLLI_ENTRIES) {
126 dev_err(dev, "Too many mlli entries. current %d max %d\n",
127 new_nents, MAX_NUM_OF_TOTAL_MLLI_ENTRIES);
131 /*handle buffer longer than 64 kbytes */
132 while (buff_size > CC_MAX_MLLI_ENTRY_SIZE) {
133 cc_lli_set_addr(mlli_entry_p, buff_dma);
134 cc_lli_set_size(mlli_entry_p, CC_MAX_MLLI_ENTRY_SIZE);
135 dev_dbg(dev, "entry[%d]: single_buff=0x%08X size=%08X\n",
136 *curr_nents, mlli_entry_p[LLI_WORD0_OFFSET],
137 mlli_entry_p[LLI_WORD1_OFFSET]);
138 buff_dma += CC_MAX_MLLI_ENTRY_SIZE;
139 buff_size -= CC_MAX_MLLI_ENTRY_SIZE;
140 mlli_entry_p = mlli_entry_p + 2;
144 cc_lli_set_addr(mlli_entry_p, buff_dma);
145 cc_lli_set_size(mlli_entry_p, buff_size);
146 dev_dbg(dev, "entry[%d]: single_buff=0x%08X size=%08X\n",
147 *curr_nents, mlli_entry_p[LLI_WORD0_OFFSET],
148 mlli_entry_p[LLI_WORD1_OFFSET]);
149 mlli_entry_p = mlli_entry_p + 2;
150 *mlli_entry_pp = mlli_entry_p;
155 static int cc_render_sg_to_mlli(struct device *dev, struct scatterlist *sgl,
156 u32 sgl_data_len, u32 sgl_offset,
157 u32 *curr_nents, u32 **mlli_entry_pp)
159 struct scatterlist *curr_sgl = sgl;
160 u32 *mlli_entry_p = *mlli_entry_pp;
163 for ( ; (curr_sgl && sgl_data_len);
164 curr_sgl = sg_next(curr_sgl)) {
166 (sgl_data_len > sg_dma_len(curr_sgl) - sgl_offset) ?
167 sg_dma_len(curr_sgl) - sgl_offset :
169 sgl_data_len -= entry_data_len;
170 rc = cc_render_buff_to_mlli(dev, sg_dma_address(curr_sgl) +
171 sgl_offset, entry_data_len,
172 curr_nents, &mlli_entry_p);
178 *mlli_entry_pp = mlli_entry_p;
182 static int cc_generate_mlli(struct device *dev, struct buffer_array *sg_data,
183 struct mlli_params *mlli_params, gfp_t flags)
186 u32 total_nents = 0, prev_total_nents = 0;
189 dev_dbg(dev, "NUM of SG's = %d\n", sg_data->num_of_buffers);
191 /* Allocate memory from the pointed pool */
192 mlli_params->mlli_virt_addr =
193 dma_pool_alloc(mlli_params->curr_pool, flags,
194 &mlli_params->mlli_dma_addr);
195 if (!mlli_params->mlli_virt_addr) {
196 dev_err(dev, "dma_pool_alloc() failed\n");
198 goto build_mlli_exit;
200 /* Point to start of MLLI */
201 mlli_p = mlli_params->mlli_virt_addr;
202 /* go over all SG's and link it to one MLLI table */
203 for (i = 0; i < sg_data->num_of_buffers; i++) {
204 union buffer_array_entry *entry = &sg_data->entry[i];
205 u32 tot_len = sg_data->total_data_len[i];
206 u32 offset = sg_data->offset[i];
208 rc = cc_render_sg_to_mlli(dev, entry->sgl, tot_len, offset,
209 &total_nents, &mlli_p);
213 /* set last bit in the current table */
214 if (sg_data->mlli_nents[i]) {
215 /*Calculate the current MLLI table length for the
216 *length field in the descriptor
218 *sg_data->mlli_nents[i] +=
219 (total_nents - prev_total_nents);
220 prev_total_nents = total_nents;
224 /* Set MLLI size for the bypass operation */
225 mlli_params->mlli_len = (total_nents * LLI_ENTRY_BYTE_SIZE);
227 dev_dbg(dev, "MLLI params: virt_addr=%pK dma_addr=%pad mlli_len=0x%X\n",
228 mlli_params->mlli_virt_addr, &mlli_params->mlli_dma_addr,
229 mlli_params->mlli_len);
235 static void cc_add_sg_entry(struct device *dev, struct buffer_array *sgl_data,
236 unsigned int nents, struct scatterlist *sgl,
237 unsigned int data_len, unsigned int data_offset,
238 bool is_last_table, u32 *mlli_nents)
240 unsigned int index = sgl_data->num_of_buffers;
242 dev_dbg(dev, "index=%u nents=%u sgl=%pK data_len=0x%08X is_last=%d\n",
243 index, nents, sgl, data_len, is_last_table);
244 sgl_data->nents[index] = nents;
245 sgl_data->entry[index].sgl = sgl;
246 sgl_data->offset[index] = data_offset;
247 sgl_data->total_data_len[index] = data_len;
248 sgl_data->is_last[index] = is_last_table;
249 sgl_data->mlli_nents[index] = mlli_nents;
250 if (sgl_data->mlli_nents[index])
251 *sgl_data->mlli_nents[index] = 0;
252 sgl_data->num_of_buffers++;
255 static int cc_map_sg(struct device *dev, struct scatterlist *sg,
256 unsigned int nbytes, int direction, u32 *nents,
257 u32 max_sg_nents, u32 *lbytes, u32 *mapped_nents)
268 *nents = cc_get_sgl_nents(dev, sg, nbytes, lbytes);
269 if (*nents > max_sg_nents) {
271 dev_err(dev, "Too many fragments. current %d max %d\n",
272 *nents, max_sg_nents);
276 ret = dma_map_sg(dev, sg, *nents, direction);
279 dev_err(dev, "dma_map_sg() sg buffer failed %d\n", ret);
289 cc_set_aead_conf_buf(struct device *dev, struct aead_req_ctx *areq_ctx,
290 u8 *config_data, struct buffer_array *sg_data,
291 unsigned int assoclen)
293 dev_dbg(dev, " handle additional data config set to DLLI\n");
294 /* create sg for the current buffer */
295 sg_init_one(&areq_ctx->ccm_adata_sg, config_data,
296 AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size);
297 if (dma_map_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE) != 1) {
298 dev_err(dev, "dma_map_sg() config buffer failed\n");
301 dev_dbg(dev, "Mapped curr_buff: dma_address=%pad page=%p addr=%pK offset=%u length=%u\n",
302 &sg_dma_address(&areq_ctx->ccm_adata_sg),
303 sg_page(&areq_ctx->ccm_adata_sg),
304 sg_virt(&areq_ctx->ccm_adata_sg),
305 areq_ctx->ccm_adata_sg.offset, areq_ctx->ccm_adata_sg.length);
306 /* prepare for case of MLLI */
308 cc_add_sg_entry(dev, sg_data, 1, &areq_ctx->ccm_adata_sg,
309 (AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size),
315 static int cc_set_hash_buf(struct device *dev, struct ahash_req_ctx *areq_ctx,
316 u8 *curr_buff, u32 curr_buff_cnt,
317 struct buffer_array *sg_data)
319 dev_dbg(dev, " handle curr buff %x set to DLLI\n", curr_buff_cnt);
320 /* create sg for the current buffer */
321 sg_init_one(areq_ctx->buff_sg, curr_buff, curr_buff_cnt);
322 if (dma_map_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE) != 1) {
323 dev_err(dev, "dma_map_sg() src buffer failed\n");
326 dev_dbg(dev, "Mapped curr_buff: dma_address=%pad page=%p addr=%pK offset=%u length=%u\n",
327 &sg_dma_address(areq_ctx->buff_sg), sg_page(areq_ctx->buff_sg),
328 sg_virt(areq_ctx->buff_sg), areq_ctx->buff_sg->offset,
329 areq_ctx->buff_sg->length);
330 areq_ctx->data_dma_buf_type = CC_DMA_BUF_DLLI;
331 areq_ctx->curr_sg = areq_ctx->buff_sg;
332 areq_ctx->in_nents = 0;
333 /* prepare for case of MLLI */
334 cc_add_sg_entry(dev, sg_data, 1, areq_ctx->buff_sg, curr_buff_cnt, 0,
339 void cc_unmap_cipher_request(struct device *dev, void *ctx,
340 unsigned int ivsize, struct scatterlist *src,
341 struct scatterlist *dst)
343 struct cipher_req_ctx *req_ctx = (struct cipher_req_ctx *)ctx;
345 if (req_ctx->gen_ctx.iv_dma_addr) {
346 dev_dbg(dev, "Unmapped iv: iv_dma_addr=%pad iv_size=%u\n",
347 &req_ctx->gen_ctx.iv_dma_addr, ivsize);
348 dma_unmap_single(dev, req_ctx->gen_ctx.iv_dma_addr,
349 ivsize, DMA_BIDIRECTIONAL);
352 if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI &&
353 req_ctx->mlli_params.mlli_virt_addr) {
354 dma_pool_free(req_ctx->mlli_params.curr_pool,
355 req_ctx->mlli_params.mlli_virt_addr,
356 req_ctx->mlli_params.mlli_dma_addr);
360 dma_unmap_sg(dev, src, req_ctx->in_nents, DMA_TO_DEVICE);
361 dma_unmap_sg(dev, dst, req_ctx->out_nents, DMA_FROM_DEVICE);
362 dev_dbg(dev, "Unmapped req->dst=%pK\n", sg_virt(dst));
363 dev_dbg(dev, "Unmapped req->src=%pK\n", sg_virt(src));
365 dma_unmap_sg(dev, src, req_ctx->in_nents, DMA_BIDIRECTIONAL);
366 dev_dbg(dev, "Unmapped req->src=%pK\n", sg_virt(src));
370 int cc_map_cipher_request(struct cc_drvdata *drvdata, void *ctx,
371 unsigned int ivsize, unsigned int nbytes,
372 void *info, struct scatterlist *src,
373 struct scatterlist *dst, gfp_t flags)
375 struct cipher_req_ctx *req_ctx = (struct cipher_req_ctx *)ctx;
376 struct mlli_params *mlli_params = &req_ctx->mlli_params;
377 struct device *dev = drvdata_to_dev(drvdata);
378 struct buffer_array sg_data;
381 u32 mapped_nents = 0;
382 int src_direction = (src != dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
384 req_ctx->dma_buf_type = CC_DMA_BUF_DLLI;
385 mlli_params->curr_pool = NULL;
386 sg_data.num_of_buffers = 0;
390 dump_byte_array("iv", info, ivsize);
391 req_ctx->gen_ctx.iv_dma_addr =
392 dma_map_single(dev, info, ivsize, DMA_BIDIRECTIONAL);
393 if (dma_mapping_error(dev, req_ctx->gen_ctx.iv_dma_addr)) {
394 dev_err(dev, "Mapping iv %u B at va=%pK for DMA failed\n",
398 dev_dbg(dev, "Mapped iv %u B at va=%pK to dma=%pad\n",
399 ivsize, info, &req_ctx->gen_ctx.iv_dma_addr);
401 req_ctx->gen_ctx.iv_dma_addr = 0;
404 /* Map the src SGL */
405 rc = cc_map_sg(dev, src, nbytes, src_direction, &req_ctx->in_nents,
406 LLI_MAX_NUM_OF_DATA_ENTRIES, &dummy, &mapped_nents);
409 if (mapped_nents > 1)
410 req_ctx->dma_buf_type = CC_DMA_BUF_MLLI;
413 /* Handle inplace operation */
414 if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI) {
415 req_ctx->out_nents = 0;
416 cc_add_sg_entry(dev, &sg_data, req_ctx->in_nents, src,
418 &req_ctx->in_mlli_nents);
422 rc = cc_map_sg(dev, dst, nbytes, DMA_FROM_DEVICE,
423 &req_ctx->out_nents, LLI_MAX_NUM_OF_DATA_ENTRIES,
424 &dummy, &mapped_nents);
427 if (mapped_nents > 1)
428 req_ctx->dma_buf_type = CC_DMA_BUF_MLLI;
430 if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI) {
431 cc_add_sg_entry(dev, &sg_data, req_ctx->in_nents, src,
433 &req_ctx->in_mlli_nents);
434 cc_add_sg_entry(dev, &sg_data, req_ctx->out_nents, dst,
436 &req_ctx->out_mlli_nents);
440 if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI) {
441 mlli_params->curr_pool = drvdata->mlli_buffs_pool;
442 rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
447 dev_dbg(dev, "areq_ctx->dma_buf_type = %s\n",
448 cc_dma_buf_type(req_ctx->dma_buf_type));
453 cc_unmap_cipher_request(dev, req_ctx, ivsize, src, dst);
457 void cc_unmap_aead_request(struct device *dev, struct aead_request *req)
459 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
460 unsigned int hw_iv_size = areq_ctx->hw_iv_size;
461 struct cc_drvdata *drvdata = dev_get_drvdata(dev);
462 int src_direction = (req->src != req->dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
464 if (areq_ctx->mac_buf_dma_addr) {
465 dma_unmap_single(dev, areq_ctx->mac_buf_dma_addr,
466 MAX_MAC_SIZE, DMA_BIDIRECTIONAL);
469 if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
470 if (areq_ctx->hkey_dma_addr) {
471 dma_unmap_single(dev, areq_ctx->hkey_dma_addr,
472 AES_BLOCK_SIZE, DMA_BIDIRECTIONAL);
475 if (areq_ctx->gcm_block_len_dma_addr) {
476 dma_unmap_single(dev, areq_ctx->gcm_block_len_dma_addr,
477 AES_BLOCK_SIZE, DMA_TO_DEVICE);
480 if (areq_ctx->gcm_iv_inc1_dma_addr) {
481 dma_unmap_single(dev, areq_ctx->gcm_iv_inc1_dma_addr,
482 AES_BLOCK_SIZE, DMA_TO_DEVICE);
485 if (areq_ctx->gcm_iv_inc2_dma_addr) {
486 dma_unmap_single(dev, areq_ctx->gcm_iv_inc2_dma_addr,
487 AES_BLOCK_SIZE, DMA_TO_DEVICE);
491 if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
492 if (areq_ctx->ccm_iv0_dma_addr) {
493 dma_unmap_single(dev, areq_ctx->ccm_iv0_dma_addr,
494 AES_BLOCK_SIZE, DMA_TO_DEVICE);
497 dma_unmap_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE);
499 if (areq_ctx->gen_ctx.iv_dma_addr) {
500 dma_unmap_single(dev, areq_ctx->gen_ctx.iv_dma_addr,
501 hw_iv_size, DMA_BIDIRECTIONAL);
502 kfree_sensitive(areq_ctx->gen_ctx.iv);
506 if ((areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI ||
507 areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) &&
508 (areq_ctx->mlli_params.mlli_virt_addr)) {
509 dev_dbg(dev, "free MLLI buffer: dma=%pad virt=%pK\n",
510 &areq_ctx->mlli_params.mlli_dma_addr,
511 areq_ctx->mlli_params.mlli_virt_addr);
512 dma_pool_free(areq_ctx->mlli_params.curr_pool,
513 areq_ctx->mlli_params.mlli_virt_addr,
514 areq_ctx->mlli_params.mlli_dma_addr);
517 dev_dbg(dev, "Unmapping src sgl: req->src=%pK areq_ctx->src.nents=%u areq_ctx->assoc.nents=%u assoclen:%u cryptlen=%u\n",
518 sg_virt(req->src), areq_ctx->src.nents, areq_ctx->assoc.nents,
519 areq_ctx->assoclen, req->cryptlen);
521 dma_unmap_sg(dev, req->src, areq_ctx->src.mapped_nents, src_direction);
522 if (req->src != req->dst) {
523 dev_dbg(dev, "Unmapping dst sgl: req->dst=%pK\n",
525 dma_unmap_sg(dev, req->dst, areq_ctx->dst.mapped_nents, DMA_FROM_DEVICE);
527 if (drvdata->coherent &&
528 areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT &&
529 req->src == req->dst) {
530 /* copy back mac from temporary location to deal with possible
531 * data memory overriding that caused by cache coherence
534 cc_copy_mac(dev, req, CC_SG_FROM_BUF);
538 static bool cc_is_icv_frag(unsigned int sgl_nents, unsigned int authsize,
539 u32 last_entry_data_size)
541 return ((sgl_nents > 1) && (last_entry_data_size < authsize));
544 static int cc_aead_chain_iv(struct cc_drvdata *drvdata,
545 struct aead_request *req,
546 struct buffer_array *sg_data,
547 bool is_last, bool do_chain)
549 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
550 unsigned int hw_iv_size = areq_ctx->hw_iv_size;
551 struct device *dev = drvdata_to_dev(drvdata);
552 gfp_t flags = cc_gfp_flags(&req->base);
556 areq_ctx->gen_ctx.iv_dma_addr = 0;
557 areq_ctx->gen_ctx.iv = NULL;
561 areq_ctx->gen_ctx.iv = kmemdup(req->iv, hw_iv_size, flags);
562 if (!areq_ctx->gen_ctx.iv)
565 areq_ctx->gen_ctx.iv_dma_addr =
566 dma_map_single(dev, areq_ctx->gen_ctx.iv, hw_iv_size,
568 if (dma_mapping_error(dev, areq_ctx->gen_ctx.iv_dma_addr)) {
569 dev_err(dev, "Mapping iv %u B at va=%pK for DMA failed\n",
570 hw_iv_size, req->iv);
571 kfree_sensitive(areq_ctx->gen_ctx.iv);
572 areq_ctx->gen_ctx.iv = NULL;
577 dev_dbg(dev, "Mapped iv %u B at va=%pK to dma=%pad\n",
578 hw_iv_size, req->iv, &areq_ctx->gen_ctx.iv_dma_addr);
584 static int cc_aead_chain_assoc(struct cc_drvdata *drvdata,
585 struct aead_request *req,
586 struct buffer_array *sg_data,
587 bool is_last, bool do_chain)
589 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
591 int mapped_nents = 0;
592 struct device *dev = drvdata_to_dev(drvdata);
596 goto chain_assoc_exit;
599 if (areq_ctx->assoclen == 0) {
600 areq_ctx->assoc_buff_type = CC_DMA_BUF_NULL;
601 areq_ctx->assoc.nents = 0;
602 areq_ctx->assoc.mlli_nents = 0;
603 dev_dbg(dev, "Chain assoc of length 0: buff_type=%s nents=%u\n",
604 cc_dma_buf_type(areq_ctx->assoc_buff_type),
605 areq_ctx->assoc.nents);
606 goto chain_assoc_exit;
609 mapped_nents = sg_nents_for_len(req->src, areq_ctx->assoclen);
610 if (mapped_nents < 0)
613 if (mapped_nents > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES) {
614 dev_err(dev, "Too many fragments. current %d max %d\n",
615 mapped_nents, LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES);
618 areq_ctx->assoc.nents = mapped_nents;
620 /* in CCM case we have additional entry for
621 * ccm header configurations
623 if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
624 if ((mapped_nents + 1) > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES) {
625 dev_err(dev, "CCM case.Too many fragments. Current %d max %d\n",
626 (areq_ctx->assoc.nents + 1),
627 LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES);
629 goto chain_assoc_exit;
633 if (mapped_nents == 1 && areq_ctx->ccm_hdr_size == ccm_header_size_null)
634 areq_ctx->assoc_buff_type = CC_DMA_BUF_DLLI;
636 areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI;
638 if (do_chain || areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI) {
639 dev_dbg(dev, "Chain assoc: buff_type=%s nents=%u\n",
640 cc_dma_buf_type(areq_ctx->assoc_buff_type),
641 areq_ctx->assoc.nents);
642 cc_add_sg_entry(dev, sg_data, areq_ctx->assoc.nents, req->src,
643 areq_ctx->assoclen, 0, is_last,
644 &areq_ctx->assoc.mlli_nents);
645 areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI;
652 static void cc_prepare_aead_data_dlli(struct aead_request *req,
653 u32 *src_last_bytes, u32 *dst_last_bytes)
655 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
656 enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
657 unsigned int authsize = areq_ctx->req_authsize;
658 struct scatterlist *sg;
661 areq_ctx->is_icv_fragmented = false;
663 if ((req->src == req->dst) || direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
664 sg = areq_ctx->src_sgl;
665 offset = *src_last_bytes - authsize;
667 sg = areq_ctx->dst_sgl;
668 offset = *dst_last_bytes - authsize;
671 areq_ctx->icv_dma_addr = sg_dma_address(sg) + offset;
672 areq_ctx->icv_virt_addr = sg_virt(sg) + offset;
675 static void cc_prepare_aead_data_mlli(struct cc_drvdata *drvdata,
676 struct aead_request *req,
677 struct buffer_array *sg_data,
678 u32 *src_last_bytes, u32 *dst_last_bytes,
681 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
682 enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
683 unsigned int authsize = areq_ctx->req_authsize;
684 struct device *dev = drvdata_to_dev(drvdata);
685 struct scatterlist *sg;
687 if (req->src == req->dst) {
689 cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents,
690 areq_ctx->src_sgl, areq_ctx->cryptlen,
691 areq_ctx->src_offset, is_last_table,
692 &areq_ctx->src.mlli_nents);
694 areq_ctx->is_icv_fragmented =
695 cc_is_icv_frag(areq_ctx->src.nents, authsize,
698 if (areq_ctx->is_icv_fragmented) {
699 /* Backup happens only when ICV is fragmented, ICV
700 * verification is made by CPU compare in order to
701 * simplify MAC verification upon request completion
703 if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
704 /* In coherent platforms (e.g. ACP)
705 * already copying ICV for any
706 * INPLACE-DECRYPT operation, hence
707 * we must neglect this code.
709 if (!drvdata->coherent)
710 cc_copy_mac(dev, req, CC_SG_TO_BUF);
712 areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
714 areq_ctx->icv_virt_addr = areq_ctx->mac_buf;
715 areq_ctx->icv_dma_addr =
716 areq_ctx->mac_buf_dma_addr;
718 } else { /* Contig. ICV */
719 sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1];
720 /*Should hanlde if the sg is not contig.*/
721 areq_ctx->icv_dma_addr = sg_dma_address(sg) +
722 (*src_last_bytes - authsize);
723 areq_ctx->icv_virt_addr = sg_virt(sg) +
724 (*src_last_bytes - authsize);
727 } else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
728 /*NON-INPLACE and DECRYPT*/
729 cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents,
730 areq_ctx->src_sgl, areq_ctx->cryptlen,
731 areq_ctx->src_offset, is_last_table,
732 &areq_ctx->src.mlli_nents);
733 cc_add_sg_entry(dev, sg_data, areq_ctx->dst.nents,
734 areq_ctx->dst_sgl, areq_ctx->cryptlen,
735 areq_ctx->dst_offset, is_last_table,
736 &areq_ctx->dst.mlli_nents);
738 areq_ctx->is_icv_fragmented =
739 cc_is_icv_frag(areq_ctx->src.nents, authsize,
741 /* Backup happens only when ICV is fragmented, ICV
743 * verification is made by CPU compare in order to simplify
744 * MAC verification upon request completion
746 if (areq_ctx->is_icv_fragmented) {
747 cc_copy_mac(dev, req, CC_SG_TO_BUF);
748 areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
750 } else { /* Contig. ICV */
751 sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1];
752 /*Should hanlde if the sg is not contig.*/
753 areq_ctx->icv_dma_addr = sg_dma_address(sg) +
754 (*src_last_bytes - authsize);
755 areq_ctx->icv_virt_addr = sg_virt(sg) +
756 (*src_last_bytes - authsize);
760 /*NON-INPLACE and ENCRYPT*/
761 cc_add_sg_entry(dev, sg_data, areq_ctx->dst.nents,
762 areq_ctx->dst_sgl, areq_ctx->cryptlen,
763 areq_ctx->dst_offset, is_last_table,
764 &areq_ctx->dst.mlli_nents);
765 cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents,
766 areq_ctx->src_sgl, areq_ctx->cryptlen,
767 areq_ctx->src_offset, is_last_table,
768 &areq_ctx->src.mlli_nents);
770 areq_ctx->is_icv_fragmented =
771 cc_is_icv_frag(areq_ctx->dst.nents, authsize,
774 if (!areq_ctx->is_icv_fragmented) {
775 sg = &areq_ctx->dst_sgl[areq_ctx->dst.nents - 1];
777 areq_ctx->icv_dma_addr = sg_dma_address(sg) +
778 (*dst_last_bytes - authsize);
779 areq_ctx->icv_virt_addr = sg_virt(sg) +
780 (*dst_last_bytes - authsize);
782 areq_ctx->icv_dma_addr = areq_ctx->mac_buf_dma_addr;
783 areq_ctx->icv_virt_addr = areq_ctx->mac_buf;
788 static int cc_aead_chain_data(struct cc_drvdata *drvdata,
789 struct aead_request *req,
790 struct buffer_array *sg_data,
791 bool is_last_table, bool do_chain)
793 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
794 struct device *dev = drvdata_to_dev(drvdata);
795 enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type;
796 unsigned int authsize = areq_ctx->req_authsize;
797 unsigned int src_last_bytes = 0, dst_last_bytes = 0;
799 u32 src_mapped_nents = 0, dst_mapped_nents = 0;
801 /* non-inplace mode */
802 unsigned int size_for_map = req->assoclen + req->cryptlen;
804 u32 size_to_skip = req->assoclen;
805 struct scatterlist *sgl;
807 offset = size_to_skip;
812 areq_ctx->src_sgl = req->src;
813 areq_ctx->dst_sgl = req->dst;
815 size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ?
817 src_mapped_nents = cc_get_sgl_nents(dev, req->src, size_for_map,
819 sg_index = areq_ctx->src_sgl->length;
820 //check where the data starts
821 while (src_mapped_nents && (sg_index <= size_to_skip)) {
823 offset -= areq_ctx->src_sgl->length;
824 sgl = sg_next(areq_ctx->src_sgl);
827 areq_ctx->src_sgl = sgl;
828 sg_index += areq_ctx->src_sgl->length;
830 if (src_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES) {
831 dev_err(dev, "Too many fragments. current %d max %d\n",
832 src_mapped_nents, LLI_MAX_NUM_OF_DATA_ENTRIES);
836 areq_ctx->src.nents = src_mapped_nents;
838 areq_ctx->src_offset = offset;
840 if (req->src != req->dst) {
841 size_for_map = req->assoclen + req->cryptlen;
843 if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT)
844 size_for_map += authsize;
846 size_for_map -= authsize;
848 rc = cc_map_sg(dev, req->dst, size_for_map, DMA_FROM_DEVICE,
849 &areq_ctx->dst.mapped_nents,
850 LLI_MAX_NUM_OF_DATA_ENTRIES, &dst_last_bytes,
853 goto chain_data_exit;
856 dst_mapped_nents = cc_get_sgl_nents(dev, req->dst, size_for_map,
858 sg_index = areq_ctx->dst_sgl->length;
859 offset = size_to_skip;
861 //check where the data starts
862 while (dst_mapped_nents && sg_index <= size_to_skip) {
864 offset -= areq_ctx->dst_sgl->length;
865 sgl = sg_next(areq_ctx->dst_sgl);
868 areq_ctx->dst_sgl = sgl;
869 sg_index += areq_ctx->dst_sgl->length;
871 if (dst_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES) {
872 dev_err(dev, "Too many fragments. current %d max %d\n",
873 dst_mapped_nents, LLI_MAX_NUM_OF_DATA_ENTRIES);
876 areq_ctx->dst.nents = dst_mapped_nents;
877 areq_ctx->dst_offset = offset;
878 if (src_mapped_nents > 1 ||
879 dst_mapped_nents > 1 ||
881 areq_ctx->data_buff_type = CC_DMA_BUF_MLLI;
882 cc_prepare_aead_data_mlli(drvdata, req, sg_data,
883 &src_last_bytes, &dst_last_bytes,
886 areq_ctx->data_buff_type = CC_DMA_BUF_DLLI;
887 cc_prepare_aead_data_dlli(req, &src_last_bytes,
895 static void cc_update_aead_mlli_nents(struct cc_drvdata *drvdata,
896 struct aead_request *req)
898 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
899 u32 curr_mlli_size = 0;
901 if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI) {
902 areq_ctx->assoc.sram_addr = drvdata->mlli_sram_addr;
903 curr_mlli_size = areq_ctx->assoc.mlli_nents *
907 if (areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) {
908 /*Inplace case dst nents equal to src nents*/
909 if (req->src == req->dst) {
910 areq_ctx->dst.mlli_nents = areq_ctx->src.mlli_nents;
911 areq_ctx->src.sram_addr = drvdata->mlli_sram_addr +
913 areq_ctx->dst.sram_addr = areq_ctx->src.sram_addr;
914 if (!areq_ctx->is_single_pass)
915 areq_ctx->assoc.mlli_nents +=
916 areq_ctx->src.mlli_nents;
918 if (areq_ctx->gen_ctx.op_type ==
919 DRV_CRYPTO_DIRECTION_DECRYPT) {
920 areq_ctx->src.sram_addr =
921 drvdata->mlli_sram_addr +
923 areq_ctx->dst.sram_addr =
924 areq_ctx->src.sram_addr +
925 areq_ctx->src.mlli_nents *
927 if (!areq_ctx->is_single_pass)
928 areq_ctx->assoc.mlli_nents +=
929 areq_ctx->src.mlli_nents;
931 areq_ctx->dst.sram_addr =
932 drvdata->mlli_sram_addr +
934 areq_ctx->src.sram_addr =
935 areq_ctx->dst.sram_addr +
936 areq_ctx->dst.mlli_nents *
938 if (!areq_ctx->is_single_pass)
939 areq_ctx->assoc.mlli_nents +=
940 areq_ctx->dst.mlli_nents;
946 int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req)
948 struct aead_req_ctx *areq_ctx = aead_request_ctx_dma(req);
949 struct mlli_params *mlli_params = &areq_ctx->mlli_params;
950 struct device *dev = drvdata_to_dev(drvdata);
951 struct buffer_array sg_data;
952 unsigned int authsize = areq_ctx->req_authsize;
955 u32 mapped_nents = 0;
956 u32 dummy = 0; /*used for the assoc data fragments */
958 gfp_t flags = cc_gfp_flags(&req->base);
960 mlli_params->curr_pool = NULL;
961 sg_data.num_of_buffers = 0;
963 /* copy mac to a temporary location to deal with possible
964 * data memory overriding that caused by cache coherence problem.
966 if (drvdata->coherent &&
967 areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT &&
968 req->src == req->dst)
969 cc_copy_mac(dev, req, CC_SG_TO_BUF);
971 /* cacluate the size for cipher remove ICV in decrypt*/
972 areq_ctx->cryptlen = (areq_ctx->gen_ctx.op_type ==
973 DRV_CRYPTO_DIRECTION_ENCRYPT) ?
975 (req->cryptlen - authsize);
977 dma_addr = dma_map_single(dev, areq_ctx->mac_buf, MAX_MAC_SIZE,
979 if (dma_mapping_error(dev, dma_addr)) {
980 dev_err(dev, "Mapping mac_buf %u B at va=%pK for DMA failed\n",
981 MAX_MAC_SIZE, areq_ctx->mac_buf);
983 goto aead_map_failure;
985 areq_ctx->mac_buf_dma_addr = dma_addr;
987 if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
988 void *addr = areq_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET;
990 dma_addr = dma_map_single(dev, addr, AES_BLOCK_SIZE,
993 if (dma_mapping_error(dev, dma_addr)) {
994 dev_err(dev, "Mapping mac_buf %u B at va=%pK for DMA failed\n",
995 AES_BLOCK_SIZE, addr);
996 areq_ctx->ccm_iv0_dma_addr = 0;
998 goto aead_map_failure;
1000 areq_ctx->ccm_iv0_dma_addr = dma_addr;
1002 rc = cc_set_aead_conf_buf(dev, areq_ctx, areq_ctx->ccm_config,
1003 &sg_data, areq_ctx->assoclen);
1005 goto aead_map_failure;
1008 if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
1009 dma_addr = dma_map_single(dev, areq_ctx->hkey, AES_BLOCK_SIZE,
1011 if (dma_mapping_error(dev, dma_addr)) {
1012 dev_err(dev, "Mapping hkey %u B at va=%pK for DMA failed\n",
1013 AES_BLOCK_SIZE, areq_ctx->hkey);
1015 goto aead_map_failure;
1017 areq_ctx->hkey_dma_addr = dma_addr;
1019 dma_addr = dma_map_single(dev, &areq_ctx->gcm_len_block,
1020 AES_BLOCK_SIZE, DMA_TO_DEVICE);
1021 if (dma_mapping_error(dev, dma_addr)) {
1022 dev_err(dev, "Mapping gcm_len_block %u B at va=%pK for DMA failed\n",
1023 AES_BLOCK_SIZE, &areq_ctx->gcm_len_block);
1025 goto aead_map_failure;
1027 areq_ctx->gcm_block_len_dma_addr = dma_addr;
1029 dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc1,
1030 AES_BLOCK_SIZE, DMA_TO_DEVICE);
1032 if (dma_mapping_error(dev, dma_addr)) {
1033 dev_err(dev, "Mapping gcm_iv_inc1 %u B at va=%pK for DMA failed\n",
1034 AES_BLOCK_SIZE, (areq_ctx->gcm_iv_inc1));
1035 areq_ctx->gcm_iv_inc1_dma_addr = 0;
1037 goto aead_map_failure;
1039 areq_ctx->gcm_iv_inc1_dma_addr = dma_addr;
1041 dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc2,
1042 AES_BLOCK_SIZE, DMA_TO_DEVICE);
1044 if (dma_mapping_error(dev, dma_addr)) {
1045 dev_err(dev, "Mapping gcm_iv_inc2 %u B at va=%pK for DMA failed\n",
1046 AES_BLOCK_SIZE, (areq_ctx->gcm_iv_inc2));
1047 areq_ctx->gcm_iv_inc2_dma_addr = 0;
1049 goto aead_map_failure;
1051 areq_ctx->gcm_iv_inc2_dma_addr = dma_addr;
1054 size_to_map = req->cryptlen + req->assoclen;
1055 /* If we do in-place encryption, we also need the auth tag */
1056 if ((areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT) &&
1057 (req->src == req->dst)) {
1058 size_to_map += authsize;
1061 rc = cc_map_sg(dev, req->src, size_to_map,
1062 (req->src != req->dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL),
1063 &areq_ctx->src.mapped_nents,
1064 (LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES +
1065 LLI_MAX_NUM_OF_DATA_ENTRIES),
1066 &dummy, &mapped_nents);
1068 goto aead_map_failure;
1070 if (areq_ctx->is_single_pass) {
1072 * Create MLLI table for:
1075 * Note: IV is contg. buffer (not an SGL)
1077 rc = cc_aead_chain_assoc(drvdata, req, &sg_data, true, false);
1079 goto aead_map_failure;
1080 rc = cc_aead_chain_iv(drvdata, req, &sg_data, true, false);
1082 goto aead_map_failure;
1083 rc = cc_aead_chain_data(drvdata, req, &sg_data, true, false);
1085 goto aead_map_failure;
1086 } else { /* DOUBLE-PASS flow */
1088 * Prepare MLLI table(s) in this order:
1090 * If ENCRYPT/DECRYPT (inplace):
1091 * (1) MLLI table for assoc
1092 * (2) IV entry (chained right after end of assoc)
1093 * (3) MLLI for src/dst (inplace operation)
1095 * If ENCRYPT (non-inplace)
1096 * (1) MLLI table for assoc
1097 * (2) IV entry (chained right after end of assoc)
1101 * If DECRYPT (non-inplace)
1102 * (1) MLLI table for assoc
1103 * (2) IV entry (chained right after end of assoc)
1107 rc = cc_aead_chain_assoc(drvdata, req, &sg_data, false, true);
1109 goto aead_map_failure;
1110 rc = cc_aead_chain_iv(drvdata, req, &sg_data, false, true);
1112 goto aead_map_failure;
1113 rc = cc_aead_chain_data(drvdata, req, &sg_data, true, true);
1115 goto aead_map_failure;
1118 /* Mlli support -start building the MLLI according to the above
1121 if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI ||
1122 areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) {
1123 mlli_params->curr_pool = drvdata->mlli_buffs_pool;
1124 rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
1126 goto aead_map_failure;
1128 cc_update_aead_mlli_nents(drvdata, req);
1129 dev_dbg(dev, "assoc params mn %d\n",
1130 areq_ctx->assoc.mlli_nents);
1131 dev_dbg(dev, "src params mn %d\n", areq_ctx->src.mlli_nents);
1132 dev_dbg(dev, "dst params mn %d\n", areq_ctx->dst.mlli_nents);
1137 cc_unmap_aead_request(dev, req);
1141 int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,
1142 struct scatterlist *src, unsigned int nbytes,
1143 bool do_update, gfp_t flags)
1145 struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
1146 struct device *dev = drvdata_to_dev(drvdata);
1147 u8 *curr_buff = cc_hash_buf(areq_ctx);
1148 u32 *curr_buff_cnt = cc_hash_buf_cnt(areq_ctx);
1149 struct mlli_params *mlli_params = &areq_ctx->mlli_params;
1150 struct buffer_array sg_data;
1153 u32 mapped_nents = 0;
1155 dev_dbg(dev, "final params : curr_buff=%pK curr_buff_cnt=0x%X nbytes = 0x%X src=%pK curr_index=%u\n",
1156 curr_buff, *curr_buff_cnt, nbytes, src, areq_ctx->buff_index);
1157 /* Init the type of the dma buffer */
1158 areq_ctx->data_dma_buf_type = CC_DMA_BUF_NULL;
1159 mlli_params->curr_pool = NULL;
1160 sg_data.num_of_buffers = 0;
1161 areq_ctx->in_nents = 0;
1163 if (nbytes == 0 && *curr_buff_cnt == 0) {
1168 /* map the previous buffer */
1169 if (*curr_buff_cnt) {
1170 rc = cc_set_hash_buf(dev, areq_ctx, curr_buff, *curr_buff_cnt,
1176 if (src && nbytes > 0 && do_update) {
1177 rc = cc_map_sg(dev, src, nbytes, DMA_TO_DEVICE,
1178 &areq_ctx->in_nents, LLI_MAX_NUM_OF_DATA_ENTRIES,
1179 &dummy, &mapped_nents);
1181 goto unmap_curr_buff;
1182 if (src && mapped_nents == 1 &&
1183 areq_ctx->data_dma_buf_type == CC_DMA_BUF_NULL) {
1184 memcpy(areq_ctx->buff_sg, src,
1185 sizeof(struct scatterlist));
1186 areq_ctx->buff_sg->length = nbytes;
1187 areq_ctx->curr_sg = areq_ctx->buff_sg;
1188 areq_ctx->data_dma_buf_type = CC_DMA_BUF_DLLI;
1190 areq_ctx->data_dma_buf_type = CC_DMA_BUF_MLLI;
1195 if (areq_ctx->data_dma_buf_type == CC_DMA_BUF_MLLI) {
1196 mlli_params->curr_pool = drvdata->mlli_buffs_pool;
1197 /* add the src data to the sg_data */
1198 cc_add_sg_entry(dev, &sg_data, areq_ctx->in_nents, src, nbytes,
1199 0, true, &areq_ctx->mlli_nents);
1200 rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
1202 goto fail_unmap_din;
1204 /* change the buffer index for the unmap function */
1205 areq_ctx->buff_index = (areq_ctx->buff_index ^ 1);
1206 dev_dbg(dev, "areq_ctx->data_dma_buf_type = %s\n",
1207 cc_dma_buf_type(areq_ctx->data_dma_buf_type));
1211 dma_unmap_sg(dev, src, areq_ctx->in_nents, DMA_TO_DEVICE);
1215 dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
1220 int cc_map_hash_request_update(struct cc_drvdata *drvdata, void *ctx,
1221 struct scatterlist *src, unsigned int nbytes,
1222 unsigned int block_size, gfp_t flags)
1224 struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
1225 struct device *dev = drvdata_to_dev(drvdata);
1226 u8 *curr_buff = cc_hash_buf(areq_ctx);
1227 u32 *curr_buff_cnt = cc_hash_buf_cnt(areq_ctx);
1228 u8 *next_buff = cc_next_buf(areq_ctx);
1229 u32 *next_buff_cnt = cc_next_buf_cnt(areq_ctx);
1230 struct mlli_params *mlli_params = &areq_ctx->mlli_params;
1231 unsigned int update_data_len;
1232 u32 total_in_len = nbytes + *curr_buff_cnt;
1233 struct buffer_array sg_data;
1234 unsigned int swap_index = 0;
1237 u32 mapped_nents = 0;
1239 dev_dbg(dev, " update params : curr_buff=%pK curr_buff_cnt=0x%X nbytes=0x%X src=%pK curr_index=%u\n",
1240 curr_buff, *curr_buff_cnt, nbytes, src, areq_ctx->buff_index);
1241 /* Init the type of the dma buffer */
1242 areq_ctx->data_dma_buf_type = CC_DMA_BUF_NULL;
1243 mlli_params->curr_pool = NULL;
1244 areq_ctx->curr_sg = NULL;
1245 sg_data.num_of_buffers = 0;
1246 areq_ctx->in_nents = 0;
1248 if (total_in_len < block_size) {
1249 dev_dbg(dev, " less than one block: curr_buff=%pK *curr_buff_cnt=0x%X copy_to=%pK\n",
1250 curr_buff, *curr_buff_cnt, &curr_buff[*curr_buff_cnt]);
1251 areq_ctx->in_nents = sg_nents_for_len(src, nbytes);
1252 sg_copy_to_buffer(src, areq_ctx->in_nents,
1253 &curr_buff[*curr_buff_cnt], nbytes);
1254 *curr_buff_cnt += nbytes;
1258 /* Calculate the residue size*/
1259 *next_buff_cnt = total_in_len & (block_size - 1);
1260 /* update data len */
1261 update_data_len = total_in_len - *next_buff_cnt;
1263 dev_dbg(dev, " temp length : *next_buff_cnt=0x%X update_data_len=0x%X\n",
1264 *next_buff_cnt, update_data_len);
1266 /* Copy the new residue to next buffer */
1267 if (*next_buff_cnt) {
1268 dev_dbg(dev, " handle residue: next buff %pK skip data %u residue %u\n",
1269 next_buff, (update_data_len - *curr_buff_cnt),
1271 cc_copy_sg_portion(dev, next_buff, src,
1272 (update_data_len - *curr_buff_cnt),
1273 nbytes, CC_SG_TO_BUF);
1274 /* change the buffer index for next operation */
1278 if (*curr_buff_cnt) {
1279 rc = cc_set_hash_buf(dev, areq_ctx, curr_buff, *curr_buff_cnt,
1283 /* change the buffer index for next operation */
1287 if (update_data_len > *curr_buff_cnt) {
1288 rc = cc_map_sg(dev, src, (update_data_len - *curr_buff_cnt),
1289 DMA_TO_DEVICE, &areq_ctx->in_nents,
1290 LLI_MAX_NUM_OF_DATA_ENTRIES, &dummy,
1293 goto unmap_curr_buff;
1294 if (mapped_nents == 1 &&
1295 areq_ctx->data_dma_buf_type == CC_DMA_BUF_NULL) {
1296 /* only one entry in the SG and no previous data */
1297 memcpy(areq_ctx->buff_sg, src,
1298 sizeof(struct scatterlist));
1299 areq_ctx->buff_sg->length = update_data_len;
1300 areq_ctx->data_dma_buf_type = CC_DMA_BUF_DLLI;
1301 areq_ctx->curr_sg = areq_ctx->buff_sg;
1303 areq_ctx->data_dma_buf_type = CC_DMA_BUF_MLLI;
1307 if (areq_ctx->data_dma_buf_type == CC_DMA_BUF_MLLI) {
1308 mlli_params->curr_pool = drvdata->mlli_buffs_pool;
1309 /* add the src data to the sg_data */
1310 cc_add_sg_entry(dev, &sg_data, areq_ctx->in_nents, src,
1311 (update_data_len - *curr_buff_cnt), 0, true,
1312 &areq_ctx->mlli_nents);
1313 rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
1315 goto fail_unmap_din;
1317 areq_ctx->buff_index = (areq_ctx->buff_index ^ swap_index);
1322 dma_unmap_sg(dev, src, areq_ctx->in_nents, DMA_TO_DEVICE);
1326 dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
1331 void cc_unmap_hash_request(struct device *dev, void *ctx,
1332 struct scatterlist *src, bool do_revert)
1334 struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
1335 u32 *prev_len = cc_next_buf_cnt(areq_ctx);
1337 /*In case a pool was set, a table was
1338 *allocated and should be released
1340 if (areq_ctx->mlli_params.curr_pool) {
1341 dev_dbg(dev, "free MLLI buffer: dma=%pad virt=%pK\n",
1342 &areq_ctx->mlli_params.mlli_dma_addr,
1343 areq_ctx->mlli_params.mlli_virt_addr);
1344 dma_pool_free(areq_ctx->mlli_params.curr_pool,
1345 areq_ctx->mlli_params.mlli_virt_addr,
1346 areq_ctx->mlli_params.mlli_dma_addr);
1349 if (src && areq_ctx->in_nents) {
1350 dev_dbg(dev, "Unmapped sg src: virt=%pK dma=%pad len=0x%X\n",
1351 sg_virt(src), &sg_dma_address(src), sg_dma_len(src));
1352 dma_unmap_sg(dev, src,
1353 areq_ctx->in_nents, DMA_TO_DEVICE);
1357 dev_dbg(dev, "Unmapped buffer: areq_ctx->buff_sg=%pK dma=%pad len 0x%X\n",
1358 sg_virt(areq_ctx->buff_sg),
1359 &sg_dma_address(areq_ctx->buff_sg),
1360 sg_dma_len(areq_ctx->buff_sg));
1361 dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
1363 /* clean the previous data length for update
1368 areq_ctx->buff_index ^= 1;
1373 int cc_buffer_mgr_init(struct cc_drvdata *drvdata)
1375 struct device *dev = drvdata_to_dev(drvdata);
1377 drvdata->mlli_buffs_pool =
1378 dma_pool_create("dx_single_mlli_tables", dev,
1379 MAX_NUM_OF_TOTAL_MLLI_ENTRIES *
1380 LLI_ENTRY_BYTE_SIZE,
1381 MLLI_TABLE_MIN_ALIGNMENT, 0);
1383 if (!drvdata->mlli_buffs_pool)
1389 int cc_buffer_mgr_fini(struct cc_drvdata *drvdata)
1391 dma_pool_destroy(drvdata->mlli_buffs_pool);