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WIP FPC-III support
[linux/fpc-iii.git] / drivers / crypto / marvell / cesa / cesa.h
blobfabfaaccca8720574134f3531d2ac32270e46983
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __MARVELL_CESA_H__
3 #define __MARVELL_CESA_H__
4
5 #include <crypto/internal/hash.h>
6 #include <crypto/internal/skcipher.h>
7
8 #include <linux/dma-direction.h>
9 #include <linux/dmapool.h>
10
11 #define CESA_ENGINE_OFF(i) (((i) * 0x2000))
12
13 #define CESA_TDMA_BYTE_CNT 0x800
14 #define CESA_TDMA_SRC_ADDR 0x810
15 #define CESA_TDMA_DST_ADDR 0x820
16 #define CESA_TDMA_NEXT_ADDR 0x830
17
18 #define CESA_TDMA_CONTROL 0x840
19 #define CESA_TDMA_DST_BURST GENMASK(2, 0)
20 #define CESA_TDMA_DST_BURST_32B 3
21 #define CESA_TDMA_DST_BURST_128B 4
22 #define CESA_TDMA_OUT_RD_EN BIT(4)
23 #define CESA_TDMA_SRC_BURST GENMASK(8, 6)
24 #define CESA_TDMA_SRC_BURST_32B (3 << 6)
25 #define CESA_TDMA_SRC_BURST_128B (4 << 6)
26 #define CESA_TDMA_CHAIN BIT(9)
27 #define CESA_TDMA_BYTE_SWAP BIT(11)
28 #define CESA_TDMA_NO_BYTE_SWAP BIT(11)
29 #define CESA_TDMA_EN BIT(12)
30 #define CESA_TDMA_FETCH_ND BIT(13)
31 #define CESA_TDMA_ACT BIT(14)
32
33 #define CESA_TDMA_CUR 0x870
34 #define CESA_TDMA_ERROR_CAUSE 0x8c8
35 #define CESA_TDMA_ERROR_MSK 0x8cc
36
37 #define CESA_TDMA_WINDOW_BASE(x) (((x) * 0x8) + 0xa00)
38 #define CESA_TDMA_WINDOW_CTRL(x) (((x) * 0x8) + 0xa04)
39
40 #define CESA_IVDIG(x) (0xdd00 + ((x) * 4) + \
41 (((x) < 5) ? 0 : 0x14))
42
43 #define CESA_SA_CMD 0xde00
44 #define CESA_SA_CMD_EN_CESA_SA_ACCL0 BIT(0)
45 #define CESA_SA_CMD_EN_CESA_SA_ACCL1 BIT(1)
46 #define CESA_SA_CMD_DISABLE_SEC BIT(2)
47
48 #define CESA_SA_DESC_P0 0xde04
49
50 #define CESA_SA_DESC_P1 0xde14
51
52 #define CESA_SA_CFG 0xde08
53 #define CESA_SA_CFG_STOP_DIG_ERR GENMASK(1, 0)
54 #define CESA_SA_CFG_DIG_ERR_CONT 0
55 #define CESA_SA_CFG_DIG_ERR_SKIP 1
56 #define CESA_SA_CFG_DIG_ERR_STOP 3
57 #define CESA_SA_CFG_CH0_W_IDMA BIT(7)
58 #define CESA_SA_CFG_CH1_W_IDMA BIT(8)
59 #define CESA_SA_CFG_ACT_CH0_IDMA BIT(9)
60 #define CESA_SA_CFG_ACT_CH1_IDMA BIT(10)
61 #define CESA_SA_CFG_MULTI_PKT BIT(11)
62 #define CESA_SA_CFG_PARA_DIS BIT(13)
63
64 #define CESA_SA_ACCEL_STATUS 0xde0c
65 #define CESA_SA_ST_ACT_0 BIT(0)
66 #define CESA_SA_ST_ACT_1 BIT(1)
67
68 /*
69 * CESA_SA_FPGA_INT_STATUS looks like a FPGA leftover and is documented only
70 * in Errata 4.12. It looks like that it was part of an IRQ-controller in FPGA
71 * and someone forgot to remove it while switching to the core and moving to
72 * CESA_SA_INT_STATUS.
73 */
74 #define CESA_SA_FPGA_INT_STATUS 0xdd68
75 #define CESA_SA_INT_STATUS 0xde20
76 #define CESA_SA_INT_AUTH_DONE BIT(0)
77 #define CESA_SA_INT_DES_E_DONE BIT(1)
78 #define CESA_SA_INT_AES_E_DONE BIT(2)
79 #define CESA_SA_INT_AES_D_DONE BIT(3)
80 #define CESA_SA_INT_ENC_DONE BIT(4)
81 #define CESA_SA_INT_ACCEL0_DONE BIT(5)
82 #define CESA_SA_INT_ACCEL1_DONE BIT(6)
83 #define CESA_SA_INT_ACC0_IDMA_DONE BIT(7)
84 #define CESA_SA_INT_ACC1_IDMA_DONE BIT(8)
85 #define CESA_SA_INT_IDMA_DONE BIT(9)
86 #define CESA_SA_INT_IDMA_OWN_ERR BIT(10)
87
88 #define CESA_SA_INT_MSK 0xde24
89
90 #define CESA_SA_DESC_CFG_OP_MAC_ONLY 0
91 #define CESA_SA_DESC_CFG_OP_CRYPT_ONLY 1
92 #define CESA_SA_DESC_CFG_OP_MAC_CRYPT 2
93 #define CESA_SA_DESC_CFG_OP_CRYPT_MAC 3
94 #define CESA_SA_DESC_CFG_OP_MSK GENMASK(1, 0)
95 #define CESA_SA_DESC_CFG_MACM_SHA256 (1 << 4)
96 #define CESA_SA_DESC_CFG_MACM_HMAC_SHA256 (3 << 4)
97 #define CESA_SA_DESC_CFG_MACM_MD5 (4 << 4)
98 #define CESA_SA_DESC_CFG_MACM_SHA1 (5 << 4)
99 #define CESA_SA_DESC_CFG_MACM_HMAC_MD5 (6 << 4)
100 #define CESA_SA_DESC_CFG_MACM_HMAC_SHA1 (7 << 4)
101 #define CESA_SA_DESC_CFG_MACM_MSK GENMASK(6, 4)
102 #define CESA_SA_DESC_CFG_CRYPTM_DES (1 << 8)
103 #define CESA_SA_DESC_CFG_CRYPTM_3DES (2 << 8)
104 #define CESA_SA_DESC_CFG_CRYPTM_AES (3 << 8)
105 #define CESA_SA_DESC_CFG_CRYPTM_MSK GENMASK(9, 8)
106 #define CESA_SA_DESC_CFG_DIR_ENC (0 << 12)
107 #define CESA_SA_DESC_CFG_DIR_DEC (1 << 12)
108 #define CESA_SA_DESC_CFG_CRYPTCM_ECB (0 << 16)
109 #define CESA_SA_DESC_CFG_CRYPTCM_CBC (1 << 16)
110 #define CESA_SA_DESC_CFG_CRYPTCM_MSK BIT(16)
111 #define CESA_SA_DESC_CFG_3DES_EEE (0 << 20)
112 #define CESA_SA_DESC_CFG_3DES_EDE (1 << 20)
113 #define CESA_SA_DESC_CFG_AES_LEN_128 (0 << 24)
114 #define CESA_SA_DESC_CFG_AES_LEN_192 (1 << 24)
115 #define CESA_SA_DESC_CFG_AES_LEN_256 (2 << 24)
116 #define CESA_SA_DESC_CFG_AES_LEN_MSK GENMASK(25, 24)
117 #define CESA_SA_DESC_CFG_NOT_FRAG (0 << 30)
118 #define CESA_SA_DESC_CFG_FIRST_FRAG (1 << 30)
119 #define CESA_SA_DESC_CFG_LAST_FRAG (2 << 30)
120 #define CESA_SA_DESC_CFG_MID_FRAG (3 << 30)
121 #define CESA_SA_DESC_CFG_FRAG_MSK GENMASK(31, 30)
122
123 /*
124 * /-----------\ 0
125 * | ACCEL CFG | 4 * 8
126 * |-----------| 0x20
127 * | CRYPT KEY | 8 * 4
128 * |-----------| 0x40
129 * | IV IN | 4 * 4
130 * |-----------| 0x40 (inplace)
131 * | IV BUF | 4 * 4
132 * |-----------| 0x80
133 * | DATA IN | 16 * x (max ->max_req_size)
134 * |-----------| 0x80 (inplace operation)
135 * | DATA OUT | 16 * x (max ->max_req_size)
136 * \-----------/ SRAM size
137 */
138
139 /*
140 * Hashing memory map:
141 * /-----------\ 0
142 * | ACCEL CFG | 4 * 8
143 * |-----------| 0x20
144 * | Inner IV | 8 * 4
145 * |-----------| 0x40
146 * | Outer IV | 8 * 4
147 * |-----------| 0x60
148 * | Output BUF| 8 * 4
149 * |-----------| 0x80
150 * | DATA IN | 64 * x (max ->max_req_size)
151 * \-----------/ SRAM size
152 */
153
154 #define CESA_SA_CFG_SRAM_OFFSET 0x00
155 #define CESA_SA_DATA_SRAM_OFFSET 0x80
156
157 #define CESA_SA_CRYPT_KEY_SRAM_OFFSET 0x20
158 #define CESA_SA_CRYPT_IV_SRAM_OFFSET 0x40
159
160 #define CESA_SA_MAC_IIV_SRAM_OFFSET 0x20
161 #define CESA_SA_MAC_OIV_SRAM_OFFSET 0x40
162 #define CESA_SA_MAC_DIG_SRAM_OFFSET 0x60
163
164 #define CESA_SA_DESC_CRYPT_DATA(offset) \
165 cpu_to_le32((CESA_SA_DATA_SRAM_OFFSET + (offset)) | \
166 ((CESA_SA_DATA_SRAM_OFFSET + (offset)) << 16))
167
168 #define CESA_SA_DESC_CRYPT_IV(offset) \
169 cpu_to_le32((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) | \
170 ((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) << 16))
171
172 #define CESA_SA_DESC_CRYPT_KEY(offset) \
173 cpu_to_le32(CESA_SA_CRYPT_KEY_SRAM_OFFSET + (offset))
174
175 #define CESA_SA_DESC_MAC_DATA(offset) \
176 cpu_to_le32(CESA_SA_DATA_SRAM_OFFSET + (offset))
177 #define CESA_SA_DESC_MAC_DATA_MSK cpu_to_le32(GENMASK(15, 0))
178
179 #define CESA_SA_DESC_MAC_TOTAL_LEN(total_len) cpu_to_le32((total_len) << 16)
180 #define CESA_SA_DESC_MAC_TOTAL_LEN_MSK cpu_to_le32(GENMASK(31, 16))
181
182 #define CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX 0xffff
183
184 #define CESA_SA_DESC_MAC_DIGEST(offset) \
185 cpu_to_le32(CESA_SA_MAC_DIG_SRAM_OFFSET + (offset))
186 #define CESA_SA_DESC_MAC_DIGEST_MSK cpu_to_le32(GENMASK(15, 0))
187
188 #define CESA_SA_DESC_MAC_FRAG_LEN(frag_len) cpu_to_le32((frag_len) << 16)
189 #define CESA_SA_DESC_MAC_FRAG_LEN_MSK cpu_to_le32(GENMASK(31, 16))
190
191 #define CESA_SA_DESC_MAC_IV(offset) \
192 cpu_to_le32((CESA_SA_MAC_IIV_SRAM_OFFSET + (offset)) | \
193 ((CESA_SA_MAC_OIV_SRAM_OFFSET + (offset)) << 16))
194
195 #define CESA_SA_SRAM_SIZE 2048
196 #define CESA_SA_SRAM_PAYLOAD_SIZE (cesa_dev->sram_size - \
197 CESA_SA_DATA_SRAM_OFFSET)
198
199 #define CESA_SA_DEFAULT_SRAM_SIZE 2048
200 #define CESA_SA_MIN_SRAM_SIZE 1024
201
202 #define CESA_SA_SRAM_MSK (2048 - 1)
203
204 #define CESA_MAX_HASH_BLOCK_SIZE 64
205 #define CESA_HASH_BLOCK_SIZE_MSK (CESA_MAX_HASH_BLOCK_SIZE - 1)
206
207 /**
208 * struct mv_cesa_sec_accel_desc - security accelerator descriptor
209 * @config: engine config
210 * @enc_p: input and output data pointers for a cipher operation
211 * @enc_len: cipher operation length
212 * @enc_key_p: cipher key pointer
213 * @enc_iv: cipher IV pointers
214 * @mac_src_p: input pointer and total hash length
215 * @mac_digest: digest pointer and hash operation length
216 * @mac_iv: hmac IV pointers
217 *
218 * Structure passed to the CESA engine to describe the crypto operation
219 * to be executed.
220 */
221 struct mv_cesa_sec_accel_desc {
222 __le32 config;
223 __le32 enc_p;
224 __le32 enc_len;
225 __le32 enc_key_p;
226 __le32 enc_iv;
227 __le32 mac_src_p;
228 __le32 mac_digest;
229 __le32 mac_iv;
230 };
231
232 /**
233 * struct mv_cesa_skcipher_op_ctx - cipher operation context
234 * @key: cipher key
235 * @iv: cipher IV
236 *
237 * Context associated to a cipher operation.
238 */
239 struct mv_cesa_skcipher_op_ctx {
240 __le32 key[8];
241 u32 iv[4];
242 };
243
244 /**
245 * struct mv_cesa_hash_op_ctx - hash or hmac operation context
246 * @key: cipher key
247 * @iv: cipher IV
248 *
249 * Context associated to an hash or hmac operation.
250 */
251 struct mv_cesa_hash_op_ctx {
252 u32 iv[16];
253 __le32 hash[8];
254 };
255
256 /**
257 * struct mv_cesa_op_ctx - crypto operation context
258 * @desc: CESA descriptor
259 * @ctx: context associated to the crypto operation
260 *
261 * Context associated to a crypto operation.
262 */
263 struct mv_cesa_op_ctx {
264 struct mv_cesa_sec_accel_desc desc;
265 union {
266 struct mv_cesa_skcipher_op_ctx skcipher;
267 struct mv_cesa_hash_op_ctx hash;
268 } ctx;
269 };
270
271 /* TDMA descriptor flags */
272 #define CESA_TDMA_DST_IN_SRAM BIT(31)
273 #define CESA_TDMA_SRC_IN_SRAM BIT(30)
274 #define CESA_TDMA_END_OF_REQ BIT(29)
275 #define CESA_TDMA_BREAK_CHAIN BIT(28)
276 #define CESA_TDMA_SET_STATE BIT(27)
277 #define CESA_TDMA_TYPE_MSK GENMASK(26, 0)
278 #define CESA_TDMA_DUMMY 0
279 #define CESA_TDMA_DATA 1
280 #define CESA_TDMA_OP 2
281 #define CESA_TDMA_RESULT 3
282
283 /**
284 * struct mv_cesa_tdma_desc - TDMA descriptor
285 * @byte_cnt: number of bytes to transfer
286 * @src: DMA address of the source
287 * @dst: DMA address of the destination
288 * @next_dma: DMA address of the next TDMA descriptor
289 * @cur_dma: DMA address of this TDMA descriptor
290 * @next: pointer to the next TDMA descriptor
291 * @op: CESA operation attached to this TDMA descriptor
292 * @data: raw data attached to this TDMA descriptor
293 * @flags: flags describing the TDMA transfer. See the
294 * "TDMA descriptor flags" section above
295 *
296 * TDMA descriptor used to create a transfer chain describing a crypto
297 * operation.
298 */
299 struct mv_cesa_tdma_desc {
300 __le32 byte_cnt;
301 union {
302 __le32 src;
303 dma_addr_t src_dma;
304 };
305 union {
306 __le32 dst;
307 dma_addr_t dst_dma;
308 };
309 __le32 next_dma;
310
311 /* Software state */
312 dma_addr_t cur_dma;
313 struct mv_cesa_tdma_desc *next;
314 union {
315 struct mv_cesa_op_ctx *op;
316 void *data;
317 };
318 u32 flags;
319 };
320
321 /**
322 * struct mv_cesa_sg_dma_iter - scatter-gather iterator
323 * @dir: transfer direction
324 * @sg: scatter list
325 * @offset: current position in the scatter list
326 * @op_offset: current position in the crypto operation
327 *
328 * Iterator used to iterate over a scatterlist while creating a TDMA chain for
329 * a crypto operation.
330 */
331 struct mv_cesa_sg_dma_iter {
332 enum dma_data_direction dir;
333 struct scatterlist *sg;
334 unsigned int offset;
335 unsigned int op_offset;
336 };
337
338 /**
339 * struct mv_cesa_dma_iter - crypto operation iterator
340 * @len: the crypto operation length
341 * @offset: current position in the crypto operation
342 * @op_len: sub-operation length (the crypto engine can only act on 2kb
343 * chunks)
344 *
345 * Iterator used to create a TDMA chain for a given crypto operation.
346 */
347 struct mv_cesa_dma_iter {
348 unsigned int len;
349 unsigned int offset;
350 unsigned int op_len;
351 };
352
353 /**
354 * struct mv_cesa_tdma_chain - TDMA chain
355 * @first: first entry in the TDMA chain
356 * @last: last entry in the TDMA chain
357 *
358 * Stores a TDMA chain for a specific crypto operation.
359 */
360 struct mv_cesa_tdma_chain {
361 struct mv_cesa_tdma_desc *first;
362 struct mv_cesa_tdma_desc *last;
363 };
364
365 struct mv_cesa_engine;
366
367 /**
368 * struct mv_cesa_caps - CESA device capabilities
369 * @engines: number of engines
370 * @has_tdma: whether this device has a TDMA block
371 * @cipher_algs: supported cipher algorithms
372 * @ncipher_algs: number of supported cipher algorithms
373 * @ahash_algs: supported hash algorithms
374 * @nahash_algs: number of supported hash algorithms
375 *
376 * Structure used to describe CESA device capabilities.
377 */
378 struct mv_cesa_caps {
379 int nengines;
380 bool has_tdma;
381 struct skcipher_alg **cipher_algs;
382 int ncipher_algs;
383 struct ahash_alg **ahash_algs;
384 int nahash_algs;
385 };
386
387 /**
388 * struct mv_cesa_dev_dma - DMA pools
389 * @tdma_desc_pool: TDMA desc pool
390 * @op_pool: crypto operation pool
391 * @cache_pool: data cache pool (used by hash implementation when the
392 * hash request is smaller than the hash block size)
393 * @padding_pool: padding pool (used by hash implementation when hardware
394 * padding cannot be used)
395 *
396 * Structure containing the different DMA pools used by this driver.
397 */
398 struct mv_cesa_dev_dma {
399 struct dma_pool *tdma_desc_pool;
400 struct dma_pool *op_pool;
401 struct dma_pool *cache_pool;
402 struct dma_pool *padding_pool;
403 };
404
405 /**
406 * struct mv_cesa_dev - CESA device
407 * @caps: device capabilities
408 * @regs: device registers
409 * @sram_size: usable SRAM size
410 * @lock: device lock
411 * @engines: array of engines
412 * @dma: dma pools
413 *
414 * Structure storing CESA device information.
415 */
416 struct mv_cesa_dev {
417 const struct mv_cesa_caps *caps;
418 void __iomem *regs;
419 struct device *dev;
420 unsigned int sram_size;
421 spinlock_t lock;
422 struct mv_cesa_engine *engines;
423 struct mv_cesa_dev_dma *dma;
424 };
425
426 /**
427 * struct mv_cesa_engine - CESA engine
428 * @id: engine id
429 * @regs: engine registers
430 * @sram: SRAM memory region
431 * @sram_dma: DMA address of the SRAM memory region
432 * @lock: engine lock
433 * @req: current crypto request
434 * @clk: engine clk
435 * @zclk: engine zclk
436 * @max_req_len: maximum chunk length (useful to create the TDMA chain)
437 * @int_mask: interrupt mask cache
438 * @pool: memory pool pointing to the memory region reserved in
439 * SRAM
440 * @queue: fifo of the pending crypto requests
441 * @load: engine load counter, useful for load balancing
442 * @chain: list of the current tdma descriptors being processed
443 * by this engine.
444 * @complete_queue: fifo of the processed requests by the engine
445 *
446 * Structure storing CESA engine information.
447 */
448 struct mv_cesa_engine {
449 int id;
450 void __iomem *regs;
451 void __iomem *sram;
452 dma_addr_t sram_dma;
453 spinlock_t lock;
454 struct crypto_async_request *req;
455 struct clk *clk;
456 struct clk *zclk;
457 size_t max_req_len;
458 u32 int_mask;
459 struct gen_pool *pool;
460 struct crypto_queue queue;
461 atomic_t load;
462 struct mv_cesa_tdma_chain chain;
463 struct list_head complete_queue;
464 int irq;
465 };
466
467 /**
468 * struct mv_cesa_req_ops - CESA request operations
469 * @process: process a request chunk result (should return 0 if the
470 * operation, -EINPROGRESS if it needs more steps or an error
471 * code)
472 * @step: launch the crypto operation on the next chunk
473 * @cleanup: cleanup the crypto request (release associated data)
474 * @complete: complete the request, i.e copy result or context from sram when
475 * needed.
476 */
477 struct mv_cesa_req_ops {
478 int (*process)(struct crypto_async_request *req, u32 status);
479 void (*step)(struct crypto_async_request *req);
480 void (*cleanup)(struct crypto_async_request *req);
481 void (*complete)(struct crypto_async_request *req);
482 };
483
484 /**
485 * struct mv_cesa_ctx - CESA operation context
486 * @ops: crypto operations
487 *
488 * Base context structure inherited by operation specific ones.
489 */
490 struct mv_cesa_ctx {
491 const struct mv_cesa_req_ops *ops;
492 };
493
494 /**
495 * struct mv_cesa_hash_ctx - CESA hash operation context
496 * @base: base context structure
497 *
498 * Hash context structure.
499 */
500 struct mv_cesa_hash_ctx {
501 struct mv_cesa_ctx base;
502 };
503
504 /**
505 * struct mv_cesa_hash_ctx - CESA hmac operation context
506 * @base: base context structure
507 * @iv: initialization vectors
508 *
509 * HMAC context structure.
510 */
511 struct mv_cesa_hmac_ctx {
512 struct mv_cesa_ctx base;
513 __be32 iv[16];
514 };
515
516 /**
517 * enum mv_cesa_req_type - request type definitions
518 * @CESA_STD_REQ: standard request
519 * @CESA_DMA_REQ: DMA request
520 */
521 enum mv_cesa_req_type {
522 CESA_STD_REQ,
523 CESA_DMA_REQ,
524 };
525
526 /**
527 * struct mv_cesa_req - CESA request
528 * @engine: engine associated with this request
529 * @chain: list of tdma descriptors associated with this request
530 */
531 struct mv_cesa_req {
532 struct mv_cesa_engine *engine;
533 struct mv_cesa_tdma_chain chain;
534 };
535
536 /**
537 * struct mv_cesa_sg_std_iter - CESA scatter-gather iterator for standard
538 * requests
539 * @iter: sg mapping iterator
540 * @offset: current offset in the SG entry mapped in memory
541 */
542 struct mv_cesa_sg_std_iter {
543 struct sg_mapping_iter iter;
544 unsigned int offset;
545 };
546
547 /**
548 * struct mv_cesa_skcipher_std_req - cipher standard request
549 * @op: operation context
550 * @offset: current operation offset
551 * @size: size of the crypto operation
552 */
553 struct mv_cesa_skcipher_std_req {
554 struct mv_cesa_op_ctx op;
555 unsigned int offset;
556 unsigned int size;
557 bool skip_ctx;
558 };
559
560 /**
561 * struct mv_cesa_skcipher_req - cipher request
562 * @req: type specific request information
563 * @src_nents: number of entries in the src sg list
564 * @dst_nents: number of entries in the dest sg list
565 */
566 struct mv_cesa_skcipher_req {
567 struct mv_cesa_req base;
568 struct mv_cesa_skcipher_std_req std;
569 int src_nents;
570 int dst_nents;
571 };
572
573 /**
574 * struct mv_cesa_ahash_std_req - standard hash request
575 * @offset: current operation offset
576 */
577 struct mv_cesa_ahash_std_req {
578 unsigned int offset;
579 };
580
581 /**
582 * struct mv_cesa_ahash_dma_req - DMA hash request
583 * @padding: padding buffer
584 * @padding_dma: DMA address of the padding buffer
585 * @cache_dma: DMA address of the cache buffer
586 */
587 struct mv_cesa_ahash_dma_req {
588 u8 *padding;
589 dma_addr_t padding_dma;
590 u8 *cache;
591 dma_addr_t cache_dma;
592 };
593
594 /**
595 * struct mv_cesa_ahash_req - hash request
596 * @req: type specific request information
597 * @cache: cache buffer
598 * @cache_ptr: write pointer in the cache buffer
599 * @len: hash total length
600 * @src_nents: number of entries in the scatterlist
601 * @last_req: define whether the current operation is the last one
602 * or not
603 * @state: hash state
604 */
605 struct mv_cesa_ahash_req {
606 struct mv_cesa_req base;
607 union {
608 struct mv_cesa_ahash_dma_req dma;
609 struct mv_cesa_ahash_std_req std;
610 } req;
611 struct mv_cesa_op_ctx op_tmpl;
612 u8 cache[CESA_MAX_HASH_BLOCK_SIZE];
613 unsigned int cache_ptr;
614 u64 len;
615 int src_nents;
616 bool last_req;
617 bool algo_le;
618 u32 state[8];
619 };
620
621 /* CESA functions */
622
623 extern struct mv_cesa_dev *cesa_dev;
624
625
626 static inline void
627 mv_cesa_engine_enqueue_complete_request(struct mv_cesa_engine *engine,
628 struct crypto_async_request *req)
629 {
630 list_add_tail(&req->list, &engine->complete_queue);
631 }
632
633 static inline struct crypto_async_request *
634 mv_cesa_engine_dequeue_complete_request(struct mv_cesa_engine *engine)
635 {
636 struct crypto_async_request *req;
637
638 req = list_first_entry_or_null(&engine->complete_queue,
639 struct crypto_async_request,
640 list);
641 if (req)
642 list_del(&req->list);
643
644 return req;
645 }
646
647
648 static inline enum mv_cesa_req_type
649 mv_cesa_req_get_type(struct mv_cesa_req *req)
650 {
651 return req->chain.first ? CESA_DMA_REQ : CESA_STD_REQ;
652 }
653
654 static inline void mv_cesa_update_op_cfg(struct mv_cesa_op_ctx *op,
655 u32 cfg, u32 mask)
656 {
657 op->desc.config &= cpu_to_le32(~mask);
658 op->desc.config |= cpu_to_le32(cfg);
659 }
660
661 static inline u32 mv_cesa_get_op_cfg(const struct mv_cesa_op_ctx *op)
662 {
663 return le32_to_cpu(op->desc.config);
664 }
665
666 static inline void mv_cesa_set_op_cfg(struct mv_cesa_op_ctx *op, u32 cfg)
667 {
668 op->desc.config = cpu_to_le32(cfg);
669 }
670
671 static inline void mv_cesa_adjust_op(struct mv_cesa_engine *engine,
672 struct mv_cesa_op_ctx *op)
673 {
674 u32 offset = engine->sram_dma & CESA_SA_SRAM_MSK;
675
676 op->desc.enc_p = CESA_SA_DESC_CRYPT_DATA(offset);
677 op->desc.enc_key_p = CESA_SA_DESC_CRYPT_KEY(offset);
678 op->desc.enc_iv = CESA_SA_DESC_CRYPT_IV(offset);
679 op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_DATA_MSK;
680 op->desc.mac_src_p |= CESA_SA_DESC_MAC_DATA(offset);
681 op->desc.mac_digest &= ~CESA_SA_DESC_MAC_DIGEST_MSK;
682 op->desc.mac_digest |= CESA_SA_DESC_MAC_DIGEST(offset);
683 op->desc.mac_iv = CESA_SA_DESC_MAC_IV(offset);
684 }
685
686 static inline void mv_cesa_set_crypt_op_len(struct mv_cesa_op_ctx *op, int len)
687 {
688 op->desc.enc_len = cpu_to_le32(len);
689 }
690
691 static inline void mv_cesa_set_mac_op_total_len(struct mv_cesa_op_ctx *op,
692 int len)
693 {
694 op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_TOTAL_LEN_MSK;
695 op->desc.mac_src_p |= CESA_SA_DESC_MAC_TOTAL_LEN(len);
696 }
697
698 static inline void mv_cesa_set_mac_op_frag_len(struct mv_cesa_op_ctx *op,
699 int len)
700 {
701 op->desc.mac_digest &= ~CESA_SA_DESC_MAC_FRAG_LEN_MSK;
702 op->desc.mac_digest |= CESA_SA_DESC_MAC_FRAG_LEN(len);
703 }
704
705 static inline void mv_cesa_set_int_mask(struct mv_cesa_engine *engine,
706 u32 int_mask)
707 {
708 if (int_mask == engine->int_mask)
709 return;
710
711 writel_relaxed(int_mask, engine->regs + CESA_SA_INT_MSK);
712 engine->int_mask = int_mask;
713 }
714
715 static inline u32 mv_cesa_get_int_mask(struct mv_cesa_engine *engine)
716 {
717 return engine->int_mask;
718 }
719
720 static inline bool mv_cesa_mac_op_is_first_frag(const struct mv_cesa_op_ctx *op)
721 {
722 return (mv_cesa_get_op_cfg(op) & CESA_SA_DESC_CFG_FRAG_MSK) ==
723 CESA_SA_DESC_CFG_FIRST_FRAG;
724 }
725
726 int mv_cesa_queue_req(struct crypto_async_request *req,
727 struct mv_cesa_req *creq);
728
729 struct crypto_async_request *
730 mv_cesa_dequeue_req_locked(struct mv_cesa_engine *engine,
731 struct crypto_async_request **backlog);
732
733 static inline struct mv_cesa_engine *mv_cesa_select_engine(int weight)
734 {
735 int i;
736 u32 min_load = U32_MAX;
737 struct mv_cesa_engine *selected = NULL;
738
739 for (i = 0; i < cesa_dev->caps->nengines; i++) {
740 struct mv_cesa_engine *engine = cesa_dev->engines + i;
741 u32 load = atomic_read(&engine->load);
742
743 if (load < min_load) {
744 min_load = load;
745 selected = engine;
746 }
747 }
748
749 atomic_add(weight, &selected->load);
750
751 return selected;
752 }
753
754 /*
755 * Helper function that indicates whether a crypto request needs to be
756 * cleaned up or not after being enqueued using mv_cesa_queue_req().
757 */
758 static inline int mv_cesa_req_needs_cleanup(struct crypto_async_request *req,
759 int ret)
760 {
761 /*
762 * The queue still had some space, the request was queued
763 * normally, so there's no need to clean it up.
764 */
765 if (ret == -EINPROGRESS)
766 return false;
767
768 /*
769 * The queue had not space left, but since the request is
770 * flagged with CRYPTO_TFM_REQ_MAY_BACKLOG, it was added to
771 * the backlog and will be processed later. There's no need to
772 * clean it up.
773 */
774 if (ret == -EBUSY)
775 return false;
776
777 /* Request wasn't queued, we need to clean it up */
778 return true;
779 }
780
781 /* TDMA functions */
782
783 static inline void mv_cesa_req_dma_iter_init(struct mv_cesa_dma_iter *iter,
784 unsigned int len)
785 {
786 iter->len = len;
787 iter->op_len = min(len, CESA_SA_SRAM_PAYLOAD_SIZE);
788 iter->offset = 0;
789 }
790
791 static inline void mv_cesa_sg_dma_iter_init(struct mv_cesa_sg_dma_iter *iter,
792 struct scatterlist *sg,
793 enum dma_data_direction dir)
794 {
795 iter->op_offset = 0;
796 iter->offset = 0;
797 iter->sg = sg;
798 iter->dir = dir;
799 }
800
801 static inline unsigned int
802 mv_cesa_req_dma_iter_transfer_len(struct mv_cesa_dma_iter *iter,
803 struct mv_cesa_sg_dma_iter *sgiter)
804 {
805 return min(iter->op_len - sgiter->op_offset,
806 sg_dma_len(sgiter->sg) - sgiter->offset);
807 }
808
809 bool mv_cesa_req_dma_iter_next_transfer(struct mv_cesa_dma_iter *chain,
810 struct mv_cesa_sg_dma_iter *sgiter,
811 unsigned int len);
812
813 static inline bool mv_cesa_req_dma_iter_next_op(struct mv_cesa_dma_iter *iter)
814 {
815 iter->offset += iter->op_len;
816 iter->op_len = min(iter->len - iter->offset,
817 CESA_SA_SRAM_PAYLOAD_SIZE);
818
819 return iter->op_len;
820 }
821
822 void mv_cesa_dma_step(struct mv_cesa_req *dreq);
823
824 static inline int mv_cesa_dma_process(struct mv_cesa_req *dreq,
825 u32 status)
826 {
827 if (!(status & CESA_SA_INT_ACC0_IDMA_DONE))
828 return -EINPROGRESS;
829
830 if (status & CESA_SA_INT_IDMA_OWN_ERR)
831 return -EINVAL;
832
833 return 0;
834 }
835
836 void mv_cesa_dma_prepare(struct mv_cesa_req *dreq,
837 struct mv_cesa_engine *engine);
838 void mv_cesa_dma_cleanup(struct mv_cesa_req *dreq);
839 void mv_cesa_tdma_chain(struct mv_cesa_engine *engine,
840 struct mv_cesa_req *dreq);
841 int mv_cesa_tdma_process(struct mv_cesa_engine *engine, u32 status);
842
843
844 static inline void
845 mv_cesa_tdma_desc_iter_init(struct mv_cesa_tdma_chain *chain)
846 {
847 memset(chain, 0, sizeof(*chain));
848 }
849
850 int mv_cesa_dma_add_result_op(struct mv_cesa_tdma_chain *chain, dma_addr_t src,
851 u32 size, u32 flags, gfp_t gfp_flags);
852
853 struct mv_cesa_op_ctx *mv_cesa_dma_add_op(struct mv_cesa_tdma_chain *chain,
854 const struct mv_cesa_op_ctx *op_templ,
855 bool skip_ctx,
856 gfp_t flags);
857
858 int mv_cesa_dma_add_data_transfer(struct mv_cesa_tdma_chain *chain,
859 dma_addr_t dst, dma_addr_t src, u32 size,
860 u32 flags, gfp_t gfp_flags);
861
862 int mv_cesa_dma_add_dummy_launch(struct mv_cesa_tdma_chain *chain, gfp_t flags);
863 int mv_cesa_dma_add_dummy_end(struct mv_cesa_tdma_chain *chain, gfp_t flags);
864
865 int mv_cesa_dma_add_op_transfers(struct mv_cesa_tdma_chain *chain,
866 struct mv_cesa_dma_iter *dma_iter,
867 struct mv_cesa_sg_dma_iter *sgiter,
868 gfp_t gfp_flags);
869
870 /* Algorithm definitions */
871
872 extern struct ahash_alg mv_md5_alg;
873 extern struct ahash_alg mv_sha1_alg;
874 extern struct ahash_alg mv_sha256_alg;
875 extern struct ahash_alg mv_ahmac_md5_alg;
876 extern struct ahash_alg mv_ahmac_sha1_alg;
877 extern struct ahash_alg mv_ahmac_sha256_alg;
878
879 extern struct skcipher_alg mv_cesa_ecb_des_alg;
880 extern struct skcipher_alg mv_cesa_cbc_des_alg;
881 extern struct skcipher_alg mv_cesa_ecb_des3_ede_alg;
882 extern struct skcipher_alg mv_cesa_cbc_des3_ede_alg;
883 extern struct skcipher_alg mv_cesa_ecb_aes_alg;
884 extern struct skcipher_alg mv_cesa_cbc_aes_alg;
885
886 #endif /* __MARVELL_CESA_H__ */
Linux with added FPC-III support