1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */
3
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>
9
10 #include "cc_buffer_mgr.h"
11 #include "cc_lli_defs.h"
12 #include "cc_cipher.h"
13 #include "cc_hash.h"
14 #include "cc_aead.h"
15
16 union buffer_array_entry {
17 struct scatterlist *sgl;
18 dma_addr_t buffer_dma;
19 };
20
21 struct buffer_array {
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];
29 };
30
cc_dma_buf_type(enum cc_req_dma_buf_type type)31 static inline char *cc_dma_buf_type(enum cc_req_dma_buf_type type)
32 {
33 switch (type) {
34 case CC_DMA_BUF_NULL:
35 return "BUF_NULL";
36 case CC_DMA_BUF_DLLI:
37 return "BUF_DLLI";
38 case CC_DMA_BUF_MLLI:
39 return "BUF_MLLI";
40 default:
41 return "BUF_INVALID";
42 }
43 }
44
45 /**
46 * cc_copy_mac() - Copy MAC to temporary location
47 *
48 * @dev: device object
49 * @req: aead request object
50 * @dir: [IN] copy from/to sgl
51 */
cc_copy_mac(struct device * dev,struct aead_request * req,enum cc_sg_cpy_direct dir)52 static void cc_copy_mac(struct device *dev, struct aead_request *req,
53 enum cc_sg_cpy_direct dir)
54 {
55 struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
56 u32 skip = req->assoclen + req->cryptlen;
57
58 cc_copy_sg_portion(dev, areq_ctx->backup_mac, req->src,
59 (skip - areq_ctx->req_authsize), skip, dir);
60 }
61
62 /**
63 * cc_get_sgl_nents() - Get scatterlist number of entries.
64 *
65 * @dev: Device object
66 * @sg_list: SG list
67 * @nbytes: [IN] Total SGL data bytes.
68 * @lbytes: [OUT] Returns the amount of bytes at the last entry
69 *
70 * Return:
71 * Number of entries in the scatterlist
72 */
cc_get_sgl_nents(struct device * dev,struct scatterlist * sg_list,unsigned int nbytes,u32 * lbytes)73 static unsigned int cc_get_sgl_nents(struct device *dev,
74 struct scatterlist *sg_list,
75 unsigned int nbytes, u32 *lbytes)
76 {
77 unsigned int nents = 0;
78
79 *lbytes = 0;
80
81 while (nbytes && sg_list) {
82 nents++;
83 /* get the number of bytes in the last entry */
84 *lbytes = nbytes;
85 nbytes -= (sg_list->length > nbytes) ?
86 nbytes : sg_list->length;
87 sg_list = sg_next(sg_list);
88 }
89
90 dev_dbg(dev, "nents %d last bytes %d\n", nents, *lbytes);
91 return nents;
92 }
93
94 /**
95 * cc_copy_sg_portion() - Copy scatter list data,
96 * from to_skip to end, to dest and vice versa
97 *
98 * @dev: Device object
99 * @dest: Buffer to copy to/from
100 * @sg: SG list
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
104 * buffer to SG list)
105 */
cc_copy_sg_portion(struct device * dev,u8 * dest,struct scatterlist * sg,u32 to_skip,u32 end,enum cc_sg_cpy_direct direct)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)
108 {
109 u32 nents;
110
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));
114 }
115
cc_render_buff_to_mlli(struct device * dev,dma_addr_t buff_dma,u32 buff_size,u32 * curr_nents,u32 ** mlli_entry_pp)116 static int cc_render_buff_to_mlli(struct device *dev, dma_addr_t buff_dma,
117 u32 buff_size, u32 *curr_nents,
118 u32 **mlli_entry_pp)
119 {
120 u32 *mlli_entry_p = *mlli_entry_pp;
121 u32 new_nents;
122
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);
128 return -ENOMEM;
129 }
130
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;
141 (*curr_nents)++;
142 }
143 /*Last entry */
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;
151 (*curr_nents)++;
152 return 0;
153 }
154
cc_render_sg_to_mlli(struct device * dev,struct scatterlist * sgl,u32 sgl_data_len,u32 sgl_offset,u32 * curr_nents,u32 ** mlli_entry_pp)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)
158 {
159 struct scatterlist *curr_sgl = sgl;
160 u32 *mlli_entry_p = *mlli_entry_pp;
161 s32 rc = 0;
162
163 for ( ; (curr_sgl && sgl_data_len);
164 curr_sgl = sg_next(curr_sgl)) {
165 u32 entry_data_len =
166 (sgl_data_len > sg_dma_len(curr_sgl) - sgl_offset) ?
167 sg_dma_len(curr_sgl) - sgl_offset :
168 sgl_data_len;
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);
173 if (rc)
174 return rc;
175
176 sgl_offset = 0;
177 }
178 *mlli_entry_pp = mlli_entry_p;
179 return 0;
180 }
181
cc_generate_mlli(struct device * dev,struct buffer_array * sg_data,struct mlli_params * mlli_params,gfp_t flags)182 static int cc_generate_mlli(struct device *dev, struct buffer_array *sg_data,
183 struct mlli_params *mlli_params, gfp_t flags)
184 {
185 u32 *mlli_p;
186 u32 total_nents = 0, prev_total_nents = 0;
187 int rc = 0, i;
188
189 dev_dbg(dev, "NUM of SG's = %d\n", sg_data->num_of_buffers);
190
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");
197 rc = -ENOMEM;
198 goto build_mlli_exit;
199 }
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];
207
208 rc = cc_render_sg_to_mlli(dev, entry->sgl, tot_len, offset,
209 &total_nents, &mlli_p);
210 if (rc)
211 return rc;
212
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
217 */
218 *sg_data->mlli_nents[i] +=
219 (total_nents - prev_total_nents);
220 prev_total_nents = total_nents;
221 }
222 }
223
224 /* Set MLLI size for the bypass operation */
225 mlli_params->mlli_len = (total_nents * LLI_ENTRY_BYTE_SIZE);
226
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);
230
231 build_mlli_exit:
232 return rc;
233 }
234
cc_add_sg_entry(struct device * dev,struct buffer_array * sgl_data,unsigned int nents,struct scatterlist * sgl,unsigned int data_len,unsigned int data_offset,bool is_last_table,u32 * mlli_nents)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)
239 {
240 unsigned int index = sgl_data->num_of_buffers;
241
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++;
253 }
254
cc_map_sg(struct device * dev,struct scatterlist * sg,unsigned int nbytes,int direction,u32 * nents,u32 max_sg_nents,u32 * lbytes,u32 * mapped_nents)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)
258 {
259 int ret = 0;
260
261 if (!nbytes) {
262 *mapped_nents = 0;
263 *lbytes = 0;
264 *nents = 0;
265 return 0;
266 }
267
268 *nents = cc_get_sgl_nents(dev, sg, nbytes, lbytes);
269 if (*nents > max_sg_nents) {
270 *nents = 0;
271 dev_err(dev, "Too many fragments. current %d max %d\n",
272 *nents, max_sg_nents);
273 return -ENOMEM;
274 }
275
276 ret = dma_map_sg(dev, sg, *nents, direction);
277 if (dma_mapping_error(dev, ret)) {
278 *nents = 0;
279 dev_err(dev, "dma_map_sg() sg buffer failed %d\n", ret);
280 return -ENOMEM;
281 }
282
283 *mapped_nents = ret;
284
285 return 0;
286 }
287
288 static int
cc_set_aead_conf_buf(struct device * dev,struct aead_req_ctx * areq_ctx,u8 * config_data,struct buffer_array * sg_data,unsigned int assoclen)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)
292 {
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");
299 return -ENOMEM;
300 }
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 */
307 if (assoclen > 0) {
308 cc_add_sg_entry(dev, sg_data, 1, &areq_ctx->ccm_adata_sg,
309 (AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size),
310 0, false, NULL);
311 }
312 return 0;
313 }
314
cc_set_hash_buf(struct device * dev,struct ahash_req_ctx * areq_ctx,u8 * curr_buff,u32 curr_buff_cnt,struct buffer_array * sg_data)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)
318 {
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");
324 return -ENOMEM;
325 }
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,
335 false, NULL);
336 return 0;
337 }
338
cc_unmap_cipher_request(struct device * dev,void * ctx,unsigned int ivsize,struct scatterlist * src,struct scatterlist * dst)339 void cc_unmap_cipher_request(struct device *dev, void *ctx,
340 unsigned int ivsize, struct scatterlist *src,
341 struct scatterlist *dst)
342 {
343 struct cipher_req_ctx *req_ctx = (struct cipher_req_ctx *)ctx;
344
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);
350 }
351 /* Release pool */
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);
357 }
358
359 if (src != dst) {
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));
364 } else {
365 dma_unmap_sg(dev, src, req_ctx->in_nents, DMA_BIDIRECTIONAL);
366 dev_dbg(dev, "Unmapped req->src=%pK\n", sg_virt(src));
367 }
368 }
369
cc_map_cipher_request(struct cc_drvdata * drvdata,void * ctx,unsigned int ivsize,unsigned int nbytes,void * info,struct scatterlist * src,struct scatterlist * dst,gfp_t flags)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)
374 {
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;
379 u32 dummy = 0;
380 int rc = 0;
381 u32 mapped_nents = 0;
382 int src_direction = (src != dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
383
384 req_ctx->dma_buf_type = CC_DMA_BUF_DLLI;
385 mlli_params->curr_pool = NULL;
386 sg_data.num_of_buffers = 0;
387
388 /* Map IV buffer */
389 if (ivsize) {
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",
395 ivsize, info);
396 return -ENOMEM;
397 }
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);
400 } else {
401 req_ctx->gen_ctx.iv_dma_addr = 0;
402 }
403
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);
407 if (rc)
408 goto cipher_exit;
409 if (mapped_nents > 1)
410 req_ctx->dma_buf_type = CC_DMA_BUF_MLLI;
411
412 if (src == dst) {
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,
417 nbytes, 0, true,
418 &req_ctx->in_mlli_nents);
419 }
420 } else {
421 /* Map the dst sg */
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);
425 if (rc)
426 goto cipher_exit;
427 if (mapped_nents > 1)
428 req_ctx->dma_buf_type = CC_DMA_BUF_MLLI;
429
430 if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI) {
431 cc_add_sg_entry(dev, &sg_data, req_ctx->in_nents, src,
432 nbytes, 0, true,
433 &req_ctx->in_mlli_nents);
434 cc_add_sg_entry(dev, &sg_data, req_ctx->out_nents, dst,
435 nbytes, 0, true,
436 &req_ctx->out_mlli_nents);
437 }
438 }
439
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);
443 if (rc)
444 goto cipher_exit;
445 }
446
447 dev_dbg(dev, "areq_ctx->dma_buf_type = %s\n",
448 cc_dma_buf_type(req_ctx->dma_buf_type));
449
450 return 0;
451
452 cipher_exit:
453 cc_unmap_cipher_request(dev, req_ctx, ivsize, src, dst);
454 return rc;
455 }
456
cc_unmap_aead_request(struct device * dev,struct aead_request * req)457 void cc_unmap_aead_request(struct device *dev, struct aead_request *req)
458 {
459 struct aead_req_ctx *areq_ctx = aead_request_ctx(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);
463
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);
467 }
468
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);
473 }
474
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);
478 }
479
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);
483 }
484
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);
488 }
489 }
490
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);
495 }
496
497 dma_unmap_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE);
498 }
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);
503 }
504
505 /* Release pool */
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);
515 }
516
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);
520
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",
524 sg_virt(req->dst));
525 dma_unmap_sg(dev, req->dst, areq_ctx->dst.mapped_nents, DMA_FROM_DEVICE);
526 }
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
532 * problem.
533 */
534 cc_copy_mac(dev, req, CC_SG_FROM_BUF);
535 }
536 }
537
cc_is_icv_frag(unsigned int sgl_nents,unsigned int authsize,u32 last_entry_data_size)538 static bool cc_is_icv_frag(unsigned int sgl_nents, unsigned int authsize,
539 u32 last_entry_data_size)
540 {
541 return ((sgl_nents > 1) && (last_entry_data_size < authsize));
542 }
543
cc_aead_chain_iv(struct cc_drvdata * drvdata,struct aead_request * req,struct buffer_array * sg_data,bool is_last,bool do_chain)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)
548 {
549 struct aead_req_ctx *areq_ctx = aead_request_ctx(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);
553 int rc = 0;
554
555 if (!req->iv) {
556 areq_ctx->gen_ctx.iv_dma_addr = 0;
557 areq_ctx->gen_ctx.iv = NULL;
558 goto chain_iv_exit;
559 }
560
561 areq_ctx->gen_ctx.iv = kmemdup(req->iv, hw_iv_size, flags);
562 if (!areq_ctx->gen_ctx.iv)
563 return -ENOMEM;
564
565 areq_ctx->gen_ctx.iv_dma_addr =
566 dma_map_single(dev, areq_ctx->gen_ctx.iv, hw_iv_size,
567 DMA_BIDIRECTIONAL);
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;
573 rc = -ENOMEM;
574 goto chain_iv_exit;
575 }
576
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);
579
580 chain_iv_exit:
581 return rc;
582 }
583
cc_aead_chain_assoc(struct cc_drvdata * drvdata,struct aead_request * req,struct buffer_array * sg_data,bool is_last,bool do_chain)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)
588 {
589 struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
590 int rc = 0;
591 int mapped_nents = 0;
592 struct device *dev = drvdata_to_dev(drvdata);
593
594 if (!sg_data) {
595 rc = -EINVAL;
596 goto chain_assoc_exit;
597 }
598
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;
607 }
608
609 mapped_nents = sg_nents_for_len(req->src, areq_ctx->assoclen);
610 if (mapped_nents < 0)
611 return mapped_nents;
612
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);
616 return -ENOMEM;
617 }
618 areq_ctx->assoc.nents = mapped_nents;
619
620 /* in CCM case we have additional entry for
621 * ccm header configurations
622 */
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);
628 rc = -ENOMEM;
629 goto chain_assoc_exit;
630 }
631 }
632
633 if (mapped_nents == 1 && areq_ctx->ccm_hdr_size == ccm_header_size_null)
634 areq_ctx->assoc_buff_type = CC_DMA_BUF_DLLI;
635 else
636 areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI;
637
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;
646 }
647
648 chain_assoc_exit:
649 return rc;
650 }
651
cc_prepare_aead_data_dlli(struct aead_request * req,u32 * src_last_bytes,u32 * dst_last_bytes)652 static void cc_prepare_aead_data_dlli(struct aead_request *req,
653 u32 *src_last_bytes, u32 *dst_last_bytes)
654 {
655 struct aead_req_ctx *areq_ctx = aead_request_ctx(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;
659 ssize_t offset;
660
661 areq_ctx->is_icv_fragmented = false;
662
663 if ((req->src == req->dst) || direct == DRV_CRYPTO_DIRECTION_DECRYPT) {
664 sg = areq_ctx->src_sgl;
665 offset = *src_last_bytes - authsize;
666 } else {
667 sg = areq_ctx->dst_sgl;
668 offset = *dst_last_bytes - authsize;
669 }
670
671 areq_ctx->icv_dma_addr = sg_dma_address(sg) + offset;
672 areq_ctx->icv_virt_addr = sg_virt(sg) + offset;
673 }
674
cc_prepare_aead_data_mlli(struct cc_drvdata * drvdata,struct aead_request * req,struct buffer_array * sg_data,u32 * src_last_bytes,u32 * dst_last_bytes,bool is_last_table)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,
679 bool is_last_table)
680 {
681 struct aead_req_ctx *areq_ctx = aead_request_ctx(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;
686
687 if (req->src == req->dst) {
688 /*INPLACE*/
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);
693
694 areq_ctx->is_icv_fragmented =
695 cc_is_icv_frag(areq_ctx->src.nents, authsize,
696 *src_last_bytes);
697
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
702 */
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.
708 */
709 if (!drvdata->coherent)
710 cc_copy_mac(dev, req, CC_SG_TO_BUF);
711
712 areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
713 } else {
714 areq_ctx->icv_virt_addr = areq_ctx->mac_buf;
715 areq_ctx->icv_dma_addr =
716 areq_ctx->mac_buf_dma_addr;
717 }
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);
725 }
726
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);
737
738 areq_ctx->is_icv_fragmented =
739 cc_is_icv_frag(areq_ctx->src.nents, authsize,
740 *src_last_bytes);
741 /* Backup happens only when ICV is fragmented, ICV
742
743 * verification is made by CPU compare in order to simplify
744 * MAC verification upon request completion
745 */
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;
749
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);
757 }
758
759 } else {
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);
769
770 areq_ctx->is_icv_fragmented =
771 cc_is_icv_frag(areq_ctx->dst.nents, authsize,
772 *dst_last_bytes);
773
774 if (!areq_ctx->is_icv_fragmented) {
775 sg = &areq_ctx->dst_sgl[areq_ctx->dst.nents - 1];
776 /* Contig. ICV */
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);
781 } else {
782 areq_ctx->icv_dma_addr = areq_ctx->mac_buf_dma_addr;
783 areq_ctx->icv_virt_addr = areq_ctx->mac_buf;
784 }
785 }
786 }
787
cc_aead_chain_data(struct cc_drvdata * drvdata,struct aead_request * req,struct buffer_array * sg_data,bool is_last_table,bool do_chain)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)
792 {
793 struct aead_req_ctx *areq_ctx = aead_request_ctx(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;
798 int rc = 0;
799 u32 src_mapped_nents = 0, dst_mapped_nents = 0;
800 u32 offset = 0;
801 /* non-inplace mode */
802 unsigned int size_for_map = req->assoclen + req->cryptlen;
803 u32 sg_index = 0;
804 u32 size_to_skip = req->assoclen;
805 struct scatterlist *sgl;
806
807 offset = size_to_skip;
808
809 if (!sg_data)
810 return -EINVAL;
811
812 areq_ctx->src_sgl = req->src;
813 areq_ctx->dst_sgl = req->dst;
814
815 size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ?
816 authsize : 0;
817 src_mapped_nents = cc_get_sgl_nents(dev, req->src, size_for_map,
818 &src_last_bytes);
819 sg_index = areq_ctx->src_sgl->length;
820 //check where the data starts
821 while (src_mapped_nents && (sg_index <= size_to_skip)) {
822 src_mapped_nents--;
823 offset -= areq_ctx->src_sgl->length;
824 sgl = sg_next(areq_ctx->src_sgl);
825 if (!sgl)
826 break;
827 areq_ctx->src_sgl = sgl;
828 sg_index += areq_ctx->src_sgl->length;
829 }
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);
833 return -ENOMEM;
834 }
835
836 areq_ctx->src.nents = src_mapped_nents;
837
838 areq_ctx->src_offset = offset;
839
840 if (req->src != req->dst) {
841 size_for_map = req->assoclen + req->cryptlen;
842
843 if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT)
844 size_for_map += authsize;
845 else
846 size_for_map -= authsize;
847
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,
851 &dst_mapped_nents);
852 if (rc)
853 goto chain_data_exit;
854 }
855
856 dst_mapped_nents = cc_get_sgl_nents(dev, req->dst, size_for_map,
857 &dst_last_bytes);
858 sg_index = areq_ctx->dst_sgl->length;
859 offset = size_to_skip;
860
861 //check where the data starts
862 while (dst_mapped_nents && sg_index <= size_to_skip) {
863 dst_mapped_nents--;
864 offset -= areq_ctx->dst_sgl->length;
865 sgl = sg_next(areq_ctx->dst_sgl);
866 if (!sgl)
867 break;
868 areq_ctx->dst_sgl = sgl;
869 sg_index += areq_ctx->dst_sgl->length;
870 }
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);
874 return -ENOMEM;
875 }
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 ||
880 do_chain) {
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,
884 is_last_table);
885 } else {
886 areq_ctx->data_buff_type = CC_DMA_BUF_DLLI;
887 cc_prepare_aead_data_dlli(req, &src_last_bytes,
888 &dst_last_bytes);
889 }
890
891 chain_data_exit:
892 return rc;
893 }
894
cc_update_aead_mlli_nents(struct cc_drvdata * drvdata,struct aead_request * req)895 static void cc_update_aead_mlli_nents(struct cc_drvdata *drvdata,
896 struct aead_request *req)
897 {
898 struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
899 u32 curr_mlli_size = 0;
900
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 *
904 LLI_ENTRY_BYTE_SIZE;
905 }
906
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 +
912 curr_mlli_size;
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;
917 } else {
918 if (areq_ctx->gen_ctx.op_type ==
919 DRV_CRYPTO_DIRECTION_DECRYPT) {
920 areq_ctx->src.sram_addr =
921 drvdata->mlli_sram_addr +
922 curr_mlli_size;
923 areq_ctx->dst.sram_addr =
924 areq_ctx->src.sram_addr +
925 areq_ctx->src.mlli_nents *
926 LLI_ENTRY_BYTE_SIZE;
927 if (!areq_ctx->is_single_pass)
928 areq_ctx->assoc.mlli_nents +=
929 areq_ctx->src.mlli_nents;
930 } else {
931 areq_ctx->dst.sram_addr =
932 drvdata->mlli_sram_addr +
933 curr_mlli_size;
934 areq_ctx->src.sram_addr =
935 areq_ctx->dst.sram_addr +
936 areq_ctx->dst.mlli_nents *
937 LLI_ENTRY_BYTE_SIZE;
938 if (!areq_ctx->is_single_pass)
939 areq_ctx->assoc.mlli_nents +=
940 areq_ctx->dst.mlli_nents;
941 }
942 }
943 }
944 }
945
cc_map_aead_request(struct cc_drvdata * drvdata,struct aead_request * req)946 int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req)
947 {
948 struct aead_req_ctx *areq_ctx = aead_request_ctx(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;
953 int rc = 0;
954 dma_addr_t dma_addr;
955 u32 mapped_nents = 0;
956 u32 dummy = 0; /*used for the assoc data fragments */
957 u32 size_to_map;
958 gfp_t flags = cc_gfp_flags(&req->base);
959
960 mlli_params->curr_pool = NULL;
961 sg_data.num_of_buffers = 0;
962
963 /* copy mac to a temporary location to deal with possible
964 * data memory overriding that caused by cache coherence problem.
965 */
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);
970
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) ?
974 req->cryptlen :
975 (req->cryptlen - authsize);
976
977 dma_addr = dma_map_single(dev, areq_ctx->mac_buf, MAX_MAC_SIZE,
978 DMA_BIDIRECTIONAL);
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);
982 rc = -ENOMEM;
983 goto aead_map_failure;
984 }
985 areq_ctx->mac_buf_dma_addr = dma_addr;
986
987 if (areq_ctx->ccm_hdr_size != ccm_header_size_null) {
988 void *addr = areq_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET;
989
990 dma_addr = dma_map_single(dev, addr, AES_BLOCK_SIZE,
991 DMA_TO_DEVICE);
992
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;
997 rc = -ENOMEM;
998 goto aead_map_failure;
999 }
1000 areq_ctx->ccm_iv0_dma_addr = dma_addr;
1001
1002 rc = cc_set_aead_conf_buf(dev, areq_ctx, areq_ctx->ccm_config,
1003 &sg_data, areq_ctx->assoclen);
1004 if (rc)
1005 goto aead_map_failure;
1006 }
1007
1008 if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) {
1009 dma_addr = dma_map_single(dev, areq_ctx->hkey, AES_BLOCK_SIZE,
1010 DMA_BIDIRECTIONAL);
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);
1014 rc = -ENOMEM;
1015 goto aead_map_failure;
1016 }
1017 areq_ctx->hkey_dma_addr = dma_addr;
1018
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);
1024 rc = -ENOMEM;
1025 goto aead_map_failure;
1026 }
1027 areq_ctx->gcm_block_len_dma_addr = dma_addr;
1028
1029 dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc1,
1030 AES_BLOCK_SIZE, DMA_TO_DEVICE);
1031
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;
1036 rc = -ENOMEM;
1037 goto aead_map_failure;
1038 }
1039 areq_ctx->gcm_iv_inc1_dma_addr = dma_addr;
1040
1041 dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc2,
1042 AES_BLOCK_SIZE, DMA_TO_DEVICE);
1043
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;
1048 rc = -ENOMEM;
1049 goto aead_map_failure;
1050 }
1051 areq_ctx->gcm_iv_inc2_dma_addr = dma_addr;
1052 }
1053
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;
1059 }
1060
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);
1067 if (rc)
1068 goto aead_map_failure;
1069
1070 if (areq_ctx->is_single_pass) {
1071 /*
1072 * Create MLLI table for:
1073 * (1) Assoc. data
1074 * (2) Src/Dst SGLs
1075 * Note: IV is contg. buffer (not an SGL)
1076 */
1077 rc = cc_aead_chain_assoc(drvdata, req, &sg_data, true, false);
1078 if (rc)
1079 goto aead_map_failure;
1080 rc = cc_aead_chain_iv(drvdata, req, &sg_data, true, false);
1081 if (rc)
1082 goto aead_map_failure;
1083 rc = cc_aead_chain_data(drvdata, req, &sg_data, true, false);
1084 if (rc)
1085 goto aead_map_failure;
1086 } else { /* DOUBLE-PASS flow */
1087 /*
1088 * Prepare MLLI table(s) in this order:
1089 *
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)
1094 *
1095 * If ENCRYPT (non-inplace)
1096 * (1) MLLI table for assoc
1097 * (2) IV entry (chained right after end of assoc)
1098 * (3) MLLI for dst
1099 * (4) MLLI for src
1100 *
1101 * If DECRYPT (non-inplace)
1102 * (1) MLLI table for assoc
1103 * (2) IV entry (chained right after end of assoc)
1104 * (3) MLLI for src
1105 * (4) MLLI for dst
1106 */
1107 rc = cc_aead_chain_assoc(drvdata, req, &sg_data, false, true);
1108 if (rc)
1109 goto aead_map_failure;
1110 rc = cc_aead_chain_iv(drvdata, req, &sg_data, false, true);
1111 if (rc)
1112 goto aead_map_failure;
1113 rc = cc_aead_chain_data(drvdata, req, &sg_data, true, true);
1114 if (rc)
1115 goto aead_map_failure;
1116 }
1117
1118 /* Mlli support -start building the MLLI according to the above
1119 * results
1120 */
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);
1125 if (rc)
1126 goto aead_map_failure;
1127
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);
1133 }
1134 return 0;
1135
1136 aead_map_failure:
1137 cc_unmap_aead_request(dev, req);
1138 return rc;
1139 }
1140
cc_map_hash_request_final(struct cc_drvdata * drvdata,void * ctx,struct scatterlist * src,unsigned int nbytes,bool do_update,gfp_t flags)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)
1144 {
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;
1151 int rc = 0;
1152 u32 dummy = 0;
1153 u32 mapped_nents = 0;
1154
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;
1162
1163 if (nbytes == 0 && *curr_buff_cnt == 0) {
1164 /* nothing to do */
1165 return 0;
1166 }
1167
1168 /* map the previous buffer */
1169 if (*curr_buff_cnt) {
1170 rc = cc_set_hash_buf(dev, areq_ctx, curr_buff, *curr_buff_cnt,
1171 &sg_data);
1172 if (rc)
1173 return rc;
1174 }
1175
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);
1180 if (rc)
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;
1189 } else {
1190 areq_ctx->data_dma_buf_type = CC_DMA_BUF_MLLI;
1191 }
1192 }
1193
1194 /*build 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);
1201 if (rc)
1202 goto fail_unmap_din;
1203 }
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));
1208 return 0;
1209
1210 fail_unmap_din:
1211 dma_unmap_sg(dev, src, areq_ctx->in_nents, DMA_TO_DEVICE);
1212
1213 unmap_curr_buff:
1214 if (*curr_buff_cnt)
1215 dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
1216
1217 return rc;
1218 }
1219
cc_map_hash_request_update(struct cc_drvdata * drvdata,void * ctx,struct scatterlist * src,unsigned int nbytes,unsigned int block_size,gfp_t flags)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)
1223 {
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;
1235 int rc = 0;
1236 u32 dummy = 0;
1237 u32 mapped_nents = 0;
1238
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;
1247
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;
1255 return 1;
1256 }
1257
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;
1262
1263 dev_dbg(dev, " temp length : *next_buff_cnt=0x%X update_data_len=0x%X\n",
1264 *next_buff_cnt, update_data_len);
1265
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),
1270 *next_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 */
1275 swap_index = 1;
1276 }
1277
1278 if (*curr_buff_cnt) {
1279 rc = cc_set_hash_buf(dev, areq_ctx, curr_buff, *curr_buff_cnt,
1280 &sg_data);
1281 if (rc)
1282 return rc;
1283 /* change the buffer index for next operation */
1284 swap_index = 1;
1285 }
1286
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,
1291 &mapped_nents);
1292 if (rc)
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;
1302 } else {
1303 areq_ctx->data_dma_buf_type = CC_DMA_BUF_MLLI;
1304 }
1305 }
1306
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);
1314 if (rc)
1315 goto fail_unmap_din;
1316 }
1317 areq_ctx->buff_index = (areq_ctx->buff_index ^ swap_index);
1318
1319 return 0;
1320
1321 fail_unmap_din:
1322 dma_unmap_sg(dev, src, areq_ctx->in_nents, DMA_TO_DEVICE);
1323
1324 unmap_curr_buff:
1325 if (*curr_buff_cnt)
1326 dma_unmap_sg(dev, areq_ctx->buff_sg, 1, DMA_TO_DEVICE);
1327
1328 return rc;
1329 }
1330
cc_unmap_hash_request(struct device * dev,void * ctx,struct scatterlist * src,bool do_revert)1331 void cc_unmap_hash_request(struct device *dev, void *ctx,
1332 struct scatterlist *src, bool do_revert)
1333 {
1334 struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
1335 u32 *prev_len = cc_next_buf_cnt(areq_ctx);
1336
1337 /*In case a pool was set, a table was
1338 *allocated and should be released
1339 */
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);
1347 }
1348
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);
1354 }
1355
1356 if (*prev_len) {
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);
1362 if (!do_revert) {
1363 /* clean the previous data length for update
1364 * operation
1365 */
1366 *prev_len = 0;
1367 } else {
1368 areq_ctx->buff_index ^= 1;
1369 }
1370 }
1371 }
1372
cc_buffer_mgr_init(struct cc_drvdata * drvdata)1373 int cc_buffer_mgr_init(struct cc_drvdata *drvdata)
1374 {
1375 struct device *dev = drvdata_to_dev(drvdata);
1376
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);
1382
1383 if (!drvdata->mlli_buffs_pool)
1384 return -ENOMEM;
1385
1386 return 0;
1387 }
1388
cc_buffer_mgr_fini(struct cc_drvdata * drvdata)1389 int cc_buffer_mgr_fini(struct cc_drvdata *drvdata)
1390 {
1391 dma_pool_destroy(drvdata->mlli_buffs_pool);
1392 return 0;
1393 }
1394