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5c8d850c KK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Cryptographic API. | |
4 | // | |
5 | // Support for Samsung S5PV210 and Exynos HW acceleration. | |
6 | // | |
7 | // Copyright (C) 2011 NetUP Inc. All rights reserved. | |
8 | // Copyright (c) 2017 Samsung Electronics Co., Ltd. All rights reserved. | |
9 | // | |
10 | // Hash part based on omap-sham.c driver. | |
a49e490c | 11 | |
3cf9d84e KK |
12 | #include <linux/clk.h> |
13 | #include <linux/crypto.h> | |
14 | #include <linux/dma-mapping.h> | |
a49e490c | 15 | #include <linux/err.h> |
a49e490c | 16 | #include <linux/errno.h> |
3cf9d84e KK |
17 | #include <linux/init.h> |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/io.h> | |
a49e490c | 20 | #include <linux/kernel.h> |
3cf9d84e KK |
21 | #include <linux/module.h> |
22 | #include <linux/of.h> | |
a49e490c VZ |
23 | #include <linux/platform_device.h> |
24 | #include <linux/scatterlist.h> | |
a49e490c | 25 | |
a49e490c | 26 | #include <crypto/ctr.h> |
3cf9d84e KK |
27 | #include <crypto/aes.h> |
28 | #include <crypto/algapi.h> | |
9e4a1100 | 29 | #include <crypto/scatterwalk.h> |
a49e490c | 30 | |
c2afad6c KK |
31 | #include <crypto/hash.h> |
32 | #include <crypto/md5.h> | |
a24d22b2 EB |
33 | #include <crypto/sha1.h> |
34 | #include <crypto/sha2.h> | |
c2afad6c KK |
35 | #include <crypto/internal/hash.h> |
36 | ||
e5e40908 | 37 | #define _SBF(s, v) ((v) << (s)) |
a49e490c VZ |
38 | |
39 | /* Feed control registers */ | |
e5e40908 | 40 | #define SSS_REG_FCINTSTAT 0x0000 |
c2afad6c KK |
41 | #define SSS_FCINTSTAT_HPARTINT BIT(7) |
42 | #define SSS_FCINTSTAT_HDONEINT BIT(5) | |
e5e40908 KK |
43 | #define SSS_FCINTSTAT_BRDMAINT BIT(3) |
44 | #define SSS_FCINTSTAT_BTDMAINT BIT(2) | |
45 | #define SSS_FCINTSTAT_HRDMAINT BIT(1) | |
46 | #define SSS_FCINTSTAT_PKDMAINT BIT(0) | |
47 | ||
48 | #define SSS_REG_FCINTENSET 0x0004 | |
c2afad6c KK |
49 | #define SSS_FCINTENSET_HPARTINTENSET BIT(7) |
50 | #define SSS_FCINTENSET_HDONEINTENSET BIT(5) | |
e5e40908 KK |
51 | #define SSS_FCINTENSET_BRDMAINTENSET BIT(3) |
52 | #define SSS_FCINTENSET_BTDMAINTENSET BIT(2) | |
53 | #define SSS_FCINTENSET_HRDMAINTENSET BIT(1) | |
54 | #define SSS_FCINTENSET_PKDMAINTENSET BIT(0) | |
55 | ||
56 | #define SSS_REG_FCINTENCLR 0x0008 | |
c2afad6c KK |
57 | #define SSS_FCINTENCLR_HPARTINTENCLR BIT(7) |
58 | #define SSS_FCINTENCLR_HDONEINTENCLR BIT(5) | |
e5e40908 KK |
59 | #define SSS_FCINTENCLR_BRDMAINTENCLR BIT(3) |
60 | #define SSS_FCINTENCLR_BTDMAINTENCLR BIT(2) | |
61 | #define SSS_FCINTENCLR_HRDMAINTENCLR BIT(1) | |
62 | #define SSS_FCINTENCLR_PKDMAINTENCLR BIT(0) | |
63 | ||
64 | #define SSS_REG_FCINTPEND 0x000C | |
c2afad6c KK |
65 | #define SSS_FCINTPEND_HPARTINTP BIT(7) |
66 | #define SSS_FCINTPEND_HDONEINTP BIT(5) | |
e5e40908 KK |
67 | #define SSS_FCINTPEND_BRDMAINTP BIT(3) |
68 | #define SSS_FCINTPEND_BTDMAINTP BIT(2) | |
69 | #define SSS_FCINTPEND_HRDMAINTP BIT(1) | |
70 | #define SSS_FCINTPEND_PKDMAINTP BIT(0) | |
71 | ||
72 | #define SSS_REG_FCFIFOSTAT 0x0010 | |
73 | #define SSS_FCFIFOSTAT_BRFIFOFUL BIT(7) | |
74 | #define SSS_FCFIFOSTAT_BRFIFOEMP BIT(6) | |
75 | #define SSS_FCFIFOSTAT_BTFIFOFUL BIT(5) | |
76 | #define SSS_FCFIFOSTAT_BTFIFOEMP BIT(4) | |
77 | #define SSS_FCFIFOSTAT_HRFIFOFUL BIT(3) | |
78 | #define SSS_FCFIFOSTAT_HRFIFOEMP BIT(2) | |
79 | #define SSS_FCFIFOSTAT_PKFIFOFUL BIT(1) | |
80 | #define SSS_FCFIFOSTAT_PKFIFOEMP BIT(0) | |
81 | ||
82 | #define SSS_REG_FCFIFOCTRL 0x0014 | |
83 | #define SSS_FCFIFOCTRL_DESSEL BIT(2) | |
84 | #define SSS_HASHIN_INDEPENDENT _SBF(0, 0x00) | |
85 | #define SSS_HASHIN_CIPHER_INPUT _SBF(0, 0x01) | |
86 | #define SSS_HASHIN_CIPHER_OUTPUT _SBF(0, 0x02) | |
c2afad6c | 87 | #define SSS_HASHIN_MASK _SBF(0, 0x03) |
e5e40908 KK |
88 | |
89 | #define SSS_REG_FCBRDMAS 0x0020 | |
90 | #define SSS_REG_FCBRDMAL 0x0024 | |
91 | #define SSS_REG_FCBRDMAC 0x0028 | |
92 | #define SSS_FCBRDMAC_BYTESWAP BIT(1) | |
93 | #define SSS_FCBRDMAC_FLUSH BIT(0) | |
94 | ||
95 | #define SSS_REG_FCBTDMAS 0x0030 | |
96 | #define SSS_REG_FCBTDMAL 0x0034 | |
97 | #define SSS_REG_FCBTDMAC 0x0038 | |
98 | #define SSS_FCBTDMAC_BYTESWAP BIT(1) | |
99 | #define SSS_FCBTDMAC_FLUSH BIT(0) | |
100 | ||
101 | #define SSS_REG_FCHRDMAS 0x0040 | |
102 | #define SSS_REG_FCHRDMAL 0x0044 | |
103 | #define SSS_REG_FCHRDMAC 0x0048 | |
104 | #define SSS_FCHRDMAC_BYTESWAP BIT(1) | |
105 | #define SSS_FCHRDMAC_FLUSH BIT(0) | |
106 | ||
107 | #define SSS_REG_FCPKDMAS 0x0050 | |
108 | #define SSS_REG_FCPKDMAL 0x0054 | |
109 | #define SSS_REG_FCPKDMAC 0x0058 | |
110 | #define SSS_FCPKDMAC_BYTESWAP BIT(3) | |
111 | #define SSS_FCPKDMAC_DESCEND BIT(2) | |
112 | #define SSS_FCPKDMAC_TRANSMIT BIT(1) | |
113 | #define SSS_FCPKDMAC_FLUSH BIT(0) | |
114 | ||
115 | #define SSS_REG_FCPKDMAO 0x005C | |
a49e490c VZ |
116 | |
117 | /* AES registers */ | |
89245107 | 118 | #define SSS_REG_AES_CONTROL 0x00 |
e5e40908 KK |
119 | #define SSS_AES_BYTESWAP_DI BIT(11) |
120 | #define SSS_AES_BYTESWAP_DO BIT(10) | |
121 | #define SSS_AES_BYTESWAP_IV BIT(9) | |
122 | #define SSS_AES_BYTESWAP_CNT BIT(8) | |
123 | #define SSS_AES_BYTESWAP_KEY BIT(7) | |
124 | #define SSS_AES_KEY_CHANGE_MODE BIT(6) | |
125 | #define SSS_AES_KEY_SIZE_128 _SBF(4, 0x00) | |
126 | #define SSS_AES_KEY_SIZE_192 _SBF(4, 0x01) | |
127 | #define SSS_AES_KEY_SIZE_256 _SBF(4, 0x02) | |
128 | #define SSS_AES_FIFO_MODE BIT(3) | |
129 | #define SSS_AES_CHAIN_MODE_ECB _SBF(1, 0x00) | |
130 | #define SSS_AES_CHAIN_MODE_CBC _SBF(1, 0x01) | |
131 | #define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02) | |
132 | #define SSS_AES_MODE_DECRYPT BIT(0) | |
a49e490c | 133 | |
89245107 | 134 | #define SSS_REG_AES_STATUS 0x04 |
e5e40908 KK |
135 | #define SSS_AES_BUSY BIT(2) |
136 | #define SSS_AES_INPUT_READY BIT(1) | |
137 | #define SSS_AES_OUTPUT_READY BIT(0) | |
a49e490c | 138 | |
89245107 NKC |
139 | #define SSS_REG_AES_IN_DATA(s) (0x10 + (s << 2)) |
140 | #define SSS_REG_AES_OUT_DATA(s) (0x20 + (s << 2)) | |
141 | #define SSS_REG_AES_IV_DATA(s) (0x30 + (s << 2)) | |
142 | #define SSS_REG_AES_CNT_DATA(s) (0x40 + (s << 2)) | |
143 | #define SSS_REG_AES_KEY_DATA(s) (0x80 + (s << 2)) | |
a49e490c | 144 | |
e5e40908 KK |
145 | #define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg)) |
146 | #define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg)) | |
147 | #define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg)) | |
a49e490c | 148 | |
e5e40908 | 149 | #define SSS_AES_REG(dev, reg) ((dev)->aes_ioaddr + SSS_REG_##reg) |
89245107 NKC |
150 | #define SSS_AES_WRITE(dev, reg, val) __raw_writel((val), \ |
151 | SSS_AES_REG(dev, reg)) | |
152 | ||
a49e490c | 153 | /* HW engine modes */ |
e5e40908 KK |
154 | #define FLAGS_AES_DECRYPT BIT(0) |
155 | #define FLAGS_AES_MODE_MASK _SBF(1, 0x03) | |
156 | #define FLAGS_AES_CBC _SBF(1, 0x01) | |
157 | #define FLAGS_AES_CTR _SBF(1, 0x02) | |
a49e490c | 158 | |
e5e40908 KK |
159 | #define AES_KEY_LEN 16 |
160 | #define CRYPTO_QUEUE_LEN 1 | |
a49e490c | 161 | |
c2afad6c KK |
162 | /* HASH registers */ |
163 | #define SSS_REG_HASH_CTRL 0x00 | |
164 | ||
165 | #define SSS_HASH_USER_IV_EN BIT(5) | |
166 | #define SSS_HASH_INIT_BIT BIT(4) | |
167 | #define SSS_HASH_ENGINE_SHA1 _SBF(1, 0x00) | |
168 | #define SSS_HASH_ENGINE_MD5 _SBF(1, 0x01) | |
169 | #define SSS_HASH_ENGINE_SHA256 _SBF(1, 0x02) | |
170 | ||
171 | #define SSS_HASH_ENGINE_MASK _SBF(1, 0x03) | |
172 | ||
173 | #define SSS_REG_HASH_CTRL_PAUSE 0x04 | |
174 | ||
175 | #define SSS_HASH_PAUSE BIT(0) | |
176 | ||
177 | #define SSS_REG_HASH_CTRL_FIFO 0x08 | |
178 | ||
179 | #define SSS_HASH_FIFO_MODE_DMA BIT(0) | |
180 | #define SSS_HASH_FIFO_MODE_CPU 0 | |
181 | ||
182 | #define SSS_REG_HASH_CTRL_SWAP 0x0C | |
183 | ||
184 | #define SSS_HASH_BYTESWAP_DI BIT(3) | |
185 | #define SSS_HASH_BYTESWAP_DO BIT(2) | |
186 | #define SSS_HASH_BYTESWAP_IV BIT(1) | |
187 | #define SSS_HASH_BYTESWAP_KEY BIT(0) | |
188 | ||
189 | #define SSS_REG_HASH_STATUS 0x10 | |
190 | ||
191 | #define SSS_HASH_STATUS_MSG_DONE BIT(6) | |
192 | #define SSS_HASH_STATUS_PARTIAL_DONE BIT(4) | |
193 | #define SSS_HASH_STATUS_BUFFER_READY BIT(0) | |
194 | ||
195 | #define SSS_REG_HASH_MSG_SIZE_LOW 0x20 | |
196 | #define SSS_REG_HASH_MSG_SIZE_HIGH 0x24 | |
197 | ||
198 | #define SSS_REG_HASH_PRE_MSG_SIZE_LOW 0x28 | |
199 | #define SSS_REG_HASH_PRE_MSG_SIZE_HIGH 0x2C | |
200 | ||
201 | #define SSS_REG_HASH_IV(s) (0xB0 + ((s) << 2)) | |
202 | #define SSS_REG_HASH_OUT(s) (0x100 + ((s) << 2)) | |
203 | ||
204 | #define HASH_BLOCK_SIZE 64 | |
205 | #define HASH_REG_SIZEOF 4 | |
206 | #define HASH_MD5_MAX_REG (MD5_DIGEST_SIZE / HASH_REG_SIZEOF) | |
207 | #define HASH_SHA1_MAX_REG (SHA1_DIGEST_SIZE / HASH_REG_SIZEOF) | |
208 | #define HASH_SHA256_MAX_REG (SHA256_DIGEST_SIZE / HASH_REG_SIZEOF) | |
209 | ||
210 | /* | |
211 | * HASH bit numbers, used by device, setting in dev->hash_flags with | |
212 | * functions set_bit(), clear_bit() or tested with test_bit() or BIT(), | |
213 | * to keep HASH state BUSY or FREE, or to signal state from irq_handler | |
214 | * to hash_tasklet. SGS keep track of allocated memory for scatterlist | |
215 | */ | |
216 | #define HASH_FLAGS_BUSY 0 | |
217 | #define HASH_FLAGS_FINAL 1 | |
218 | #define HASH_FLAGS_DMA_ACTIVE 2 | |
219 | #define HASH_FLAGS_OUTPUT_READY 3 | |
220 | #define HASH_FLAGS_DMA_READY 4 | |
221 | #define HASH_FLAGS_SGS_COPIED 5 | |
222 | #define HASH_FLAGS_SGS_ALLOCED 6 | |
223 | ||
224 | /* HASH HW constants */ | |
225 | #define BUFLEN HASH_BLOCK_SIZE | |
226 | ||
227 | #define SSS_HASH_DMA_LEN_ALIGN 8 | |
228 | #define SSS_HASH_DMA_ALIGN_MASK (SSS_HASH_DMA_LEN_ALIGN - 1) | |
229 | ||
230 | #define SSS_HASH_QUEUE_LENGTH 10 | |
231 | ||
89245107 NKC |
232 | /** |
233 | * struct samsung_aes_variant - platform specific SSS driver data | |
89245107 | 234 | * @aes_offset: AES register offset from SSS module's base. |
c2afad6c | 235 | * @hash_offset: HASH register offset from SSS module's base. |
0918f18c | 236 | * @clk_names: names of clocks needed to run SSS IP |
89245107 NKC |
237 | * |
238 | * Specifies platform specific configuration of SSS module. | |
239 | * Note: A structure for driver specific platform data is used for future | |
240 | * expansion of its usage. | |
241 | */ | |
242 | struct samsung_aes_variant { | |
5318c53d | 243 | unsigned int aes_offset; |
c2afad6c | 244 | unsigned int hash_offset; |
aa1abbe0 | 245 | const char *clk_names[2]; |
89245107 NKC |
246 | }; |
247 | ||
a49e490c | 248 | struct s5p_aes_reqctx { |
5318c53d | 249 | unsigned long mode; |
a49e490c VZ |
250 | }; |
251 | ||
252 | struct s5p_aes_ctx { | |
5318c53d | 253 | struct s5p_aes_dev *dev; |
a49e490c | 254 | |
b1b4416f CM |
255 | u8 aes_key[AES_MAX_KEY_SIZE]; |
256 | u8 nonce[CTR_RFC3686_NONCE_SIZE]; | |
5318c53d | 257 | int keylen; |
a49e490c VZ |
258 | }; |
259 | ||
106d7334 KK |
260 | /** |
261 | * struct s5p_aes_dev - Crypto device state container | |
262 | * @dev: Associated device | |
263 | * @clk: Clock for accessing hardware | |
98a6bc10 | 264 | * @pclk: APB bus clock necessary to access the hardware |
106d7334 KK |
265 | * @ioaddr: Mapped IO memory region |
266 | * @aes_ioaddr: Per-varian offset for AES block IO memory | |
267 | * @irq_fc: Feed control interrupt line | |
268 | * @req: Crypto request currently handled by the device | |
269 | * @ctx: Configuration for currently handled crypto request | |
270 | * @sg_src: Scatter list with source data for currently handled block | |
271 | * in device. This is DMA-mapped into device. | |
272 | * @sg_dst: Scatter list with destination data for currently handled block | |
273 | * in device. This is DMA-mapped into device. | |
274 | * @sg_src_cpy: In case of unaligned access, copied scatter list | |
275 | * with source data. | |
276 | * @sg_dst_cpy: In case of unaligned access, copied scatter list | |
277 | * with destination data. | |
278 | * @tasklet: New request scheduling jib | |
279 | * @queue: Crypto queue | |
280 | * @busy: Indicates whether the device is currently handling some request | |
281 | * thus it uses some of the fields from this state, like: | |
282 | * req, ctx, sg_src/dst (and copies). This essentially | |
283 | * protects against concurrent access to these fields. | |
284 | * @lock: Lock for protecting both access to device hardware registers | |
285 | * and fields related to current request (including the busy field). | |
c2afad6c KK |
286 | * @res: Resources for hash. |
287 | * @io_hash_base: Per-variant offset for HASH block IO memory. | |
288 | * @hash_lock: Lock for protecting hash_req, hash_queue and hash_flags | |
289 | * variable. | |
290 | * @hash_flags: Flags for current HASH op. | |
291 | * @hash_queue: Async hash queue. | |
292 | * @hash_tasklet: New HASH request scheduling job. | |
293 | * @xmit_buf: Buffer for current HASH request transfer into SSS block. | |
294 | * @hash_req: Current request sending to SSS HASH block. | |
295 | * @hash_sg_iter: Scatterlist transferred through DMA into SSS HASH block. | |
296 | * @hash_sg_cnt: Counter for hash_sg_iter. | |
297 | * | |
298 | * @use_hash: true if HASH algs enabled | |
106d7334 | 299 | */ |
a49e490c | 300 | struct s5p_aes_dev { |
5318c53d KK |
301 | struct device *dev; |
302 | struct clk *clk; | |
0918f18c | 303 | struct clk *pclk; |
5318c53d KK |
304 | void __iomem *ioaddr; |
305 | void __iomem *aes_ioaddr; | |
306 | int irq_fc; | |
a49e490c | 307 | |
e6b98ce6 | 308 | struct skcipher_request *req; |
5318c53d KK |
309 | struct s5p_aes_ctx *ctx; |
310 | struct scatterlist *sg_src; | |
311 | struct scatterlist *sg_dst; | |
a49e490c | 312 | |
5318c53d KK |
313 | struct scatterlist *sg_src_cpy; |
314 | struct scatterlist *sg_dst_cpy; | |
9e4a1100 | 315 | |
5318c53d KK |
316 | struct tasklet_struct tasklet; |
317 | struct crypto_queue queue; | |
318 | bool busy; | |
319 | spinlock_t lock; | |
c2afad6c KK |
320 | |
321 | struct resource *res; | |
322 | void __iomem *io_hash_base; | |
323 | ||
324 | spinlock_t hash_lock; /* protect hash_ vars */ | |
325 | unsigned long hash_flags; | |
326 | struct crypto_queue hash_queue; | |
327 | struct tasklet_struct hash_tasklet; | |
328 | ||
329 | u8 xmit_buf[BUFLEN]; | |
330 | struct ahash_request *hash_req; | |
331 | struct scatterlist *hash_sg_iter; | |
332 | unsigned int hash_sg_cnt; | |
333 | ||
334 | bool use_hash; | |
a49e490c VZ |
335 | }; |
336 | ||
c2afad6c KK |
337 | /** |
338 | * struct s5p_hash_reqctx - HASH request context | |
339 | * @dd: Associated device | |
340 | * @op_update: Current request operation (OP_UPDATE or OP_FINAL) | |
341 | * @digcnt: Number of bytes processed by HW (without buffer[] ones) | |
342 | * @digest: Digest message or IV for partial result | |
343 | * @nregs: Number of HW registers for digest or IV read/write | |
344 | * @engine: Bits for selecting type of HASH in SSS block | |
345 | * @sg: sg for DMA transfer | |
346 | * @sg_len: Length of sg for DMA transfer | |
98a6bc10 | 347 | * @sgl: sg for joining buffer and req->src scatterlist |
c2afad6c KK |
348 | * @skip: Skip offset in req->src for current op |
349 | * @total: Total number of bytes for current request | |
350 | * @finup: Keep state for finup or final. | |
351 | * @error: Keep track of error. | |
352 | * @bufcnt: Number of bytes holded in buffer[] | |
98a6bc10 | 353 | * @buffer: For byte(s) from end of req->src in UPDATE op |
c2afad6c KK |
354 | */ |
355 | struct s5p_hash_reqctx { | |
356 | struct s5p_aes_dev *dd; | |
357 | bool op_update; | |
358 | ||
359 | u64 digcnt; | |
360 | u8 digest[SHA256_DIGEST_SIZE]; | |
361 | ||
362 | unsigned int nregs; /* digest_size / sizeof(reg) */ | |
363 | u32 engine; | |
364 | ||
365 | struct scatterlist *sg; | |
366 | unsigned int sg_len; | |
367 | struct scatterlist sgl[2]; | |
368 | unsigned int skip; | |
369 | unsigned int total; | |
370 | bool finup; | |
371 | bool error; | |
372 | ||
373 | u32 bufcnt; | |
a4a70fa9 | 374 | u8 buffer[]; |
c2afad6c KK |
375 | }; |
376 | ||
377 | /** | |
378 | * struct s5p_hash_ctx - HASH transformation context | |
379 | * @dd: Associated device | |
380 | * @flags: Bits for algorithm HASH. | |
381 | * @fallback: Software transformation for zero message or size < BUFLEN. | |
382 | */ | |
383 | struct s5p_hash_ctx { | |
384 | struct s5p_aes_dev *dd; | |
385 | unsigned long flags; | |
386 | struct crypto_shash *fallback; | |
387 | }; | |
a49e490c | 388 | |
89245107 | 389 | static const struct samsung_aes_variant s5p_aes_data = { |
89245107 | 390 | .aes_offset = 0x4000, |
c2afad6c | 391 | .hash_offset = 0x6000, |
0918f18c | 392 | .clk_names = { "secss", }, |
89245107 NKC |
393 | }; |
394 | ||
395 | static const struct samsung_aes_variant exynos_aes_data = { | |
89245107 | 396 | .aes_offset = 0x200, |
c2afad6c | 397 | .hash_offset = 0x400, |
0918f18c KK |
398 | .clk_names = { "secss", }, |
399 | }; | |
400 | ||
401 | static const struct samsung_aes_variant exynos5433_slim_aes_data = { | |
402 | .aes_offset = 0x400, | |
403 | .hash_offset = 0x800, | |
404 | .clk_names = { "pclk", "aclk", }, | |
89245107 NKC |
405 | }; |
406 | ||
6b9f16e6 | 407 | static const struct of_device_id s5p_sss_dt_match[] = { |
89245107 NKC |
408 | { |
409 | .compatible = "samsung,s5pv210-secss", | |
410 | .data = &s5p_aes_data, | |
411 | }, | |
412 | { | |
413 | .compatible = "samsung,exynos4210-secss", | |
414 | .data = &exynos_aes_data, | |
415 | }, | |
0918f18c KK |
416 | { |
417 | .compatible = "samsung,exynos5433-slim-sss", | |
418 | .data = &exynos5433_slim_aes_data, | |
419 | }, | |
6b9f16e6 NKC |
420 | { }, |
421 | }; | |
422 | MODULE_DEVICE_TABLE(of, s5p_sss_dt_match); | |
423 | ||
6584eacb KK |
424 | static inline const struct samsung_aes_variant *find_s5p_sss_version |
425 | (const struct platform_device *pdev) | |
89245107 NKC |
426 | { |
427 | if (IS_ENABLED(CONFIG_OF) && (pdev->dev.of_node)) { | |
428 | const struct of_device_id *match; | |
313becd1 | 429 | |
89245107 NKC |
430 | match = of_match_node(s5p_sss_dt_match, |
431 | pdev->dev.of_node); | |
6584eacb | 432 | return (const struct samsung_aes_variant *)match->data; |
89245107 | 433 | } |
6584eacb | 434 | return (const struct samsung_aes_variant *) |
89245107 NKC |
435 | platform_get_device_id(pdev)->driver_data; |
436 | } | |
437 | ||
c2afad6c KK |
438 | static struct s5p_aes_dev *s5p_dev; |
439 | ||
6584eacb KK |
440 | static void s5p_set_dma_indata(struct s5p_aes_dev *dev, |
441 | const struct scatterlist *sg) | |
a49e490c VZ |
442 | { |
443 | SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg)); | |
444 | SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg)); | |
445 | } | |
446 | ||
6584eacb KK |
447 | static void s5p_set_dma_outdata(struct s5p_aes_dev *dev, |
448 | const struct scatterlist *sg) | |
a49e490c VZ |
449 | { |
450 | SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg)); | |
451 | SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg)); | |
452 | } | |
453 | ||
9e4a1100 KK |
454 | static void s5p_free_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist **sg) |
455 | { | |
456 | int len; | |
457 | ||
458 | if (!*sg) | |
459 | return; | |
460 | ||
e6b98ce6 | 461 | len = ALIGN(dev->req->cryptlen, AES_BLOCK_SIZE); |
9e4a1100 KK |
462 | free_pages((unsigned long)sg_virt(*sg), get_order(len)); |
463 | ||
464 | kfree(*sg); | |
465 | *sg = NULL; | |
466 | } | |
467 | ||
468 | static void s5p_sg_copy_buf(void *buf, struct scatterlist *sg, | |
469 | unsigned int nbytes, int out) | |
470 | { | |
471 | struct scatter_walk walk; | |
472 | ||
473 | if (!nbytes) | |
474 | return; | |
475 | ||
476 | scatterwalk_start(&walk, sg); | |
477 | scatterwalk_copychunks(buf, &walk, nbytes, out); | |
478 | scatterwalk_done(&walk, out, 0); | |
479 | } | |
480 | ||
28b62b14 | 481 | static void s5p_sg_done(struct s5p_aes_dev *dev) |
a49e490c | 482 | { |
e6b98ce6 AB |
483 | struct skcipher_request *req = dev->req; |
484 | struct s5p_aes_reqctx *reqctx = skcipher_request_ctx(req); | |
e8e3c1ca | 485 | |
9e4a1100 KK |
486 | if (dev->sg_dst_cpy) { |
487 | dev_dbg(dev->dev, | |
488 | "Copying %d bytes of output data back to original place\n", | |
e6b98ce6 | 489 | dev->req->cryptlen); |
9e4a1100 | 490 | s5p_sg_copy_buf(sg_virt(dev->sg_dst_cpy), dev->req->dst, |
e6b98ce6 | 491 | dev->req->cryptlen, 1); |
9e4a1100 KK |
492 | } |
493 | s5p_free_sg_cpy(dev, &dev->sg_src_cpy); | |
494 | s5p_free_sg_cpy(dev, &dev->sg_dst_cpy); | |
e8e3c1ca | 495 | if (reqctx->mode & FLAGS_AES_CBC) |
e6b98ce6 | 496 | memcpy_fromio(req->iv, dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), AES_BLOCK_SIZE); |
e8e3c1ca KK |
497 | |
498 | else if (reqctx->mode & FLAGS_AES_CTR) | |
e6b98ce6 | 499 | memcpy_fromio(req->iv, dev->aes_ioaddr + SSS_REG_AES_CNT_DATA(0), AES_BLOCK_SIZE); |
28b62b14 | 500 | } |
9e4a1100 | 501 | |
28b62b14 | 502 | /* Calls the completion. Cannot be called with dev->lock hold. */ |
e6b98ce6 | 503 | static void s5p_aes_complete(struct skcipher_request *req, int err) |
28b62b14 | 504 | { |
5842cd44 | 505 | req->base.complete(&req->base, err); |
a49e490c VZ |
506 | } |
507 | ||
508 | static void s5p_unset_outdata(struct s5p_aes_dev *dev) | |
509 | { | |
510 | dma_unmap_sg(dev->dev, dev->sg_dst, 1, DMA_FROM_DEVICE); | |
511 | } | |
512 | ||
513 | static void s5p_unset_indata(struct s5p_aes_dev *dev) | |
514 | { | |
515 | dma_unmap_sg(dev->dev, dev->sg_src, 1, DMA_TO_DEVICE); | |
516 | } | |
517 | ||
9e4a1100 | 518 | static int s5p_make_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist *src, |
6c12b6ba | 519 | struct scatterlist **dst) |
9e4a1100 KK |
520 | { |
521 | void *pages; | |
522 | int len; | |
523 | ||
524 | *dst = kmalloc(sizeof(**dst), GFP_ATOMIC); | |
525 | if (!*dst) | |
526 | return -ENOMEM; | |
527 | ||
e6b98ce6 | 528 | len = ALIGN(dev->req->cryptlen, AES_BLOCK_SIZE); |
9e4a1100 KK |
529 | pages = (void *)__get_free_pages(GFP_ATOMIC, get_order(len)); |
530 | if (!pages) { | |
531 | kfree(*dst); | |
532 | *dst = NULL; | |
533 | return -ENOMEM; | |
534 | } | |
535 | ||
e6b98ce6 | 536 | s5p_sg_copy_buf(pages, src, dev->req->cryptlen, 0); |
9e4a1100 KK |
537 | |
538 | sg_init_table(*dst, 1); | |
539 | sg_set_buf(*dst, pages, len); | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
a49e490c VZ |
544 | static int s5p_set_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg) |
545 | { | |
b1b4416f CM |
546 | if (!sg->length) |
547 | return -EINVAL; | |
a49e490c | 548 | |
b1b4416f CM |
549 | if (!dma_map_sg(dev->dev, sg, 1, DMA_FROM_DEVICE)) |
550 | return -ENOMEM; | |
a49e490c VZ |
551 | |
552 | dev->sg_dst = sg; | |
a49e490c | 553 | |
b1b4416f | 554 | return 0; |
a49e490c VZ |
555 | } |
556 | ||
557 | static int s5p_set_indata(struct s5p_aes_dev *dev, struct scatterlist *sg) | |
558 | { | |
b1b4416f CM |
559 | if (!sg->length) |
560 | return -EINVAL; | |
a49e490c | 561 | |
b1b4416f CM |
562 | if (!dma_map_sg(dev->dev, sg, 1, DMA_TO_DEVICE)) |
563 | return -ENOMEM; | |
a49e490c VZ |
564 | |
565 | dev->sg_src = sg; | |
a49e490c | 566 | |
b1b4416f | 567 | return 0; |
a49e490c VZ |
568 | } |
569 | ||
79152e8d | 570 | /* |
28b62b14 KK |
571 | * Returns -ERRNO on error (mapping of new data failed). |
572 | * On success returns: | |
573 | * - 0 if there is no more data, | |
574 | * - 1 if new transmitting (output) data is ready and its address+length | |
575 | * have to be written to device (by calling s5p_set_dma_outdata()). | |
79152e8d | 576 | */ |
28b62b14 | 577 | static int s5p_aes_tx(struct s5p_aes_dev *dev) |
a49e490c | 578 | { |
28b62b14 | 579 | int ret = 0; |
a49e490c VZ |
580 | |
581 | s5p_unset_outdata(dev); | |
582 | ||
583 | if (!sg_is_last(dev->sg_dst)) { | |
28b62b14 KK |
584 | ret = s5p_set_outdata(dev, sg_next(dev->sg_dst)); |
585 | if (!ret) | |
586 | ret = 1; | |
dc5e3f19 | 587 | } |
79152e8d KK |
588 | |
589 | return ret; | |
a49e490c VZ |
590 | } |
591 | ||
79152e8d | 592 | /* |
28b62b14 KK |
593 | * Returns -ERRNO on error (mapping of new data failed). |
594 | * On success returns: | |
595 | * - 0 if there is no more data, | |
596 | * - 1 if new receiving (input) data is ready and its address+length | |
597 | * have to be written to device (by calling s5p_set_dma_indata()). | |
79152e8d | 598 | */ |
28b62b14 | 599 | static int s5p_aes_rx(struct s5p_aes_dev *dev/*, bool *set_dma*/) |
a49e490c | 600 | { |
28b62b14 | 601 | int ret = 0; |
a49e490c VZ |
602 | |
603 | s5p_unset_indata(dev); | |
604 | ||
605 | if (!sg_is_last(dev->sg_src)) { | |
28b62b14 KK |
606 | ret = s5p_set_indata(dev, sg_next(dev->sg_src)); |
607 | if (!ret) | |
608 | ret = 1; | |
a49e490c | 609 | } |
79152e8d KK |
610 | |
611 | return ret; | |
a49e490c VZ |
612 | } |
613 | ||
c2afad6c KK |
614 | static inline u32 s5p_hash_read(struct s5p_aes_dev *dd, u32 offset) |
615 | { | |
616 | return __raw_readl(dd->io_hash_base + offset); | |
617 | } | |
618 | ||
619 | static inline void s5p_hash_write(struct s5p_aes_dev *dd, | |
620 | u32 offset, u32 value) | |
621 | { | |
622 | __raw_writel(value, dd->io_hash_base + offset); | |
623 | } | |
624 | ||
625 | /** | |
626 | * s5p_set_dma_hashdata() - start DMA with sg | |
627 | * @dev: device | |
628 | * @sg: scatterlist ready to DMA transmit | |
629 | */ | |
630 | static void s5p_set_dma_hashdata(struct s5p_aes_dev *dev, | |
6584eacb | 631 | const struct scatterlist *sg) |
c2afad6c KK |
632 | { |
633 | dev->hash_sg_cnt--; | |
634 | SSS_WRITE(dev, FCHRDMAS, sg_dma_address(sg)); | |
635 | SSS_WRITE(dev, FCHRDMAL, sg_dma_len(sg)); /* DMA starts */ | |
636 | } | |
637 | ||
638 | /** | |
639 | * s5p_hash_rx() - get next hash_sg_iter | |
640 | * @dev: device | |
641 | * | |
642 | * Return: | |
643 | * 2 if there is no more data and it is UPDATE op | |
644 | * 1 if new receiving (input) data is ready and can be written to device | |
645 | * 0 if there is no more data and it is FINAL op | |
646 | */ | |
647 | static int s5p_hash_rx(struct s5p_aes_dev *dev) | |
648 | { | |
649 | if (dev->hash_sg_cnt > 0) { | |
650 | dev->hash_sg_iter = sg_next(dev->hash_sg_iter); | |
651 | return 1; | |
652 | } | |
653 | ||
654 | set_bit(HASH_FLAGS_DMA_READY, &dev->hash_flags); | |
655 | if (test_bit(HASH_FLAGS_FINAL, &dev->hash_flags)) | |
656 | return 0; | |
657 | ||
658 | return 2; | |
659 | } | |
660 | ||
a49e490c VZ |
661 | static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id) |
662 | { | |
663 | struct platform_device *pdev = dev_id; | |
5318c53d | 664 | struct s5p_aes_dev *dev = platform_get_drvdata(pdev); |
e6b98ce6 | 665 | struct skcipher_request *req; |
28b62b14 KK |
666 | int err_dma_tx = 0; |
667 | int err_dma_rx = 0; | |
c2afad6c | 668 | int err_dma_hx = 0; |
28b62b14 | 669 | bool tx_end = false; |
c2afad6c | 670 | bool hx_end = false; |
5318c53d | 671 | unsigned long flags; |
b1b4416f | 672 | u32 status, st_bits; |
28b62b14 | 673 | int err; |
a49e490c VZ |
674 | |
675 | spin_lock_irqsave(&dev->lock, flags); | |
676 | ||
28b62b14 KK |
677 | /* |
678 | * Handle rx or tx interrupt. If there is still data (scatterlist did not | |
679 | * reach end), then map next scatterlist entry. | |
680 | * In case of such mapping error, s5p_aes_complete() should be called. | |
681 | * | |
682 | * If there is no more data in tx scatter list, call s5p_aes_complete() | |
683 | * and schedule new tasklet. | |
c2afad6c KK |
684 | * |
685 | * Handle hx interrupt. If there is still data map next entry. | |
28b62b14 | 686 | */ |
55124425 KK |
687 | status = SSS_READ(dev, FCINTSTAT); |
688 | if (status & SSS_FCINTSTAT_BRDMAINT) | |
28b62b14 KK |
689 | err_dma_rx = s5p_aes_rx(dev); |
690 | ||
691 | if (status & SSS_FCINTSTAT_BTDMAINT) { | |
692 | if (sg_is_last(dev->sg_dst)) | |
693 | tx_end = true; | |
694 | err_dma_tx = s5p_aes_tx(dev); | |
695 | } | |
a49e490c | 696 | |
c2afad6c KK |
697 | if (status & SSS_FCINTSTAT_HRDMAINT) |
698 | err_dma_hx = s5p_hash_rx(dev); | |
699 | ||
700 | st_bits = status & (SSS_FCINTSTAT_BRDMAINT | SSS_FCINTSTAT_BTDMAINT | | |
701 | SSS_FCINTSTAT_HRDMAINT); | |
702 | /* clear DMA bits */ | |
703 | SSS_WRITE(dev, FCINTPEND, st_bits); | |
704 | ||
705 | /* clear HASH irq bits */ | |
706 | if (status & (SSS_FCINTSTAT_HDONEINT | SSS_FCINTSTAT_HPARTINT)) { | |
707 | /* cannot have both HPART and HDONE */ | |
708 | if (status & SSS_FCINTSTAT_HPARTINT) | |
709 | st_bits = SSS_HASH_STATUS_PARTIAL_DONE; | |
710 | ||
711 | if (status & SSS_FCINTSTAT_HDONEINT) | |
712 | st_bits = SSS_HASH_STATUS_MSG_DONE; | |
713 | ||
714 | set_bit(HASH_FLAGS_OUTPUT_READY, &dev->hash_flags); | |
715 | s5p_hash_write(dev, SSS_REG_HASH_STATUS, st_bits); | |
716 | hx_end = true; | |
717 | /* when DONE or PART, do not handle HASH DMA */ | |
718 | err_dma_hx = 0; | |
719 | } | |
a49e490c | 720 | |
28b62b14 KK |
721 | if (err_dma_rx < 0) { |
722 | err = err_dma_rx; | |
723 | goto error; | |
724 | } | |
725 | if (err_dma_tx < 0) { | |
726 | err = err_dma_tx; | |
727 | goto error; | |
728 | } | |
729 | ||
730 | if (tx_end) { | |
731 | s5p_sg_done(dev); | |
c2afad6c KK |
732 | if (err_dma_hx == 1) |
733 | s5p_set_dma_hashdata(dev, dev->hash_sg_iter); | |
28b62b14 KK |
734 | |
735 | spin_unlock_irqrestore(&dev->lock, flags); | |
736 | ||
5842cd44 | 737 | s5p_aes_complete(dev->req, 0); |
42d5c176 | 738 | /* Device is still busy */ |
28b62b14 KK |
739 | tasklet_schedule(&dev->tasklet); |
740 | } else { | |
741 | /* | |
742 | * Writing length of DMA block (either receiving or | |
743 | * transmitting) will start the operation immediately, so this | |
744 | * should be done at the end (even after clearing pending | |
745 | * interrupts to not miss the interrupt). | |
746 | */ | |
747 | if (err_dma_tx == 1) | |
748 | s5p_set_dma_outdata(dev, dev->sg_dst); | |
749 | if (err_dma_rx == 1) | |
750 | s5p_set_dma_indata(dev, dev->sg_src); | |
c2afad6c KK |
751 | if (err_dma_hx == 1) |
752 | s5p_set_dma_hashdata(dev, dev->hash_sg_iter); | |
79152e8d | 753 | |
28b62b14 KK |
754 | spin_unlock_irqrestore(&dev->lock, flags); |
755 | } | |
756 | ||
c2afad6c | 757 | goto hash_irq_end; |
28b62b14 KK |
758 | |
759 | error: | |
760 | s5p_sg_done(dev); | |
42d5c176 | 761 | dev->busy = false; |
5842cd44 | 762 | req = dev->req; |
c2afad6c KK |
763 | if (err_dma_hx == 1) |
764 | s5p_set_dma_hashdata(dev, dev->hash_sg_iter); | |
765 | ||
a49e490c | 766 | spin_unlock_irqrestore(&dev->lock, flags); |
5842cd44 | 767 | s5p_aes_complete(req, err); |
a49e490c | 768 | |
c2afad6c KK |
769 | hash_irq_end: |
770 | /* | |
771 | * Note about else if: | |
772 | * when hash_sg_iter reaches end and its UPDATE op, | |
773 | * issue SSS_HASH_PAUSE and wait for HPART irq | |
774 | */ | |
775 | if (hx_end) | |
776 | tasklet_schedule(&dev->hash_tasklet); | |
777 | else if (err_dma_hx == 2) | |
778 | s5p_hash_write(dev, SSS_REG_HASH_CTRL_PAUSE, | |
779 | SSS_HASH_PAUSE); | |
780 | ||
a49e490c VZ |
781 | return IRQ_HANDLED; |
782 | } | |
783 | ||
c2afad6c KK |
784 | /** |
785 | * s5p_hash_read_msg() - read message or IV from HW | |
786 | * @req: AHASH request | |
787 | */ | |
788 | static void s5p_hash_read_msg(struct ahash_request *req) | |
789 | { | |
790 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
791 | struct s5p_aes_dev *dd = ctx->dd; | |
792 | u32 *hash = (u32 *)ctx->digest; | |
793 | unsigned int i; | |
794 | ||
795 | for (i = 0; i < ctx->nregs; i++) | |
796 | hash[i] = s5p_hash_read(dd, SSS_REG_HASH_OUT(i)); | |
797 | } | |
798 | ||
799 | /** | |
800 | * s5p_hash_write_ctx_iv() - write IV for next partial/finup op. | |
801 | * @dd: device | |
802 | * @ctx: request context | |
803 | */ | |
804 | static void s5p_hash_write_ctx_iv(struct s5p_aes_dev *dd, | |
6584eacb | 805 | const struct s5p_hash_reqctx *ctx) |
c2afad6c | 806 | { |
6584eacb | 807 | const u32 *hash = (const u32 *)ctx->digest; |
c2afad6c KK |
808 | unsigned int i; |
809 | ||
810 | for (i = 0; i < ctx->nregs; i++) | |
811 | s5p_hash_write(dd, SSS_REG_HASH_IV(i), hash[i]); | |
812 | } | |
813 | ||
814 | /** | |
815 | * s5p_hash_write_iv() - write IV for next partial/finup op. | |
816 | * @req: AHASH request | |
817 | */ | |
818 | static void s5p_hash_write_iv(struct ahash_request *req) | |
819 | { | |
820 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
821 | ||
822 | s5p_hash_write_ctx_iv(ctx->dd, ctx); | |
823 | } | |
824 | ||
825 | /** | |
826 | * s5p_hash_copy_result() - copy digest into req->result | |
827 | * @req: AHASH request | |
828 | */ | |
829 | static void s5p_hash_copy_result(struct ahash_request *req) | |
830 | { | |
6584eacb | 831 | const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); |
c2afad6c KK |
832 | |
833 | if (!req->result) | |
834 | return; | |
835 | ||
836 | memcpy(req->result, ctx->digest, ctx->nregs * HASH_REG_SIZEOF); | |
837 | } | |
838 | ||
839 | /** | |
840 | * s5p_hash_dma_flush() - flush HASH DMA | |
841 | * @dev: secss device | |
842 | */ | |
843 | static void s5p_hash_dma_flush(struct s5p_aes_dev *dev) | |
844 | { | |
845 | SSS_WRITE(dev, FCHRDMAC, SSS_FCHRDMAC_FLUSH); | |
846 | } | |
847 | ||
848 | /** | |
849 | * s5p_hash_dma_enable() - enable DMA mode for HASH | |
850 | * @dev: secss device | |
851 | * | |
852 | * enable DMA mode for HASH | |
853 | */ | |
854 | static void s5p_hash_dma_enable(struct s5p_aes_dev *dev) | |
855 | { | |
856 | s5p_hash_write(dev, SSS_REG_HASH_CTRL_FIFO, SSS_HASH_FIFO_MODE_DMA); | |
857 | } | |
858 | ||
859 | /** | |
860 | * s5p_hash_irq_disable() - disable irq HASH signals | |
861 | * @dev: secss device | |
862 | * @flags: bitfield with irq's to be disabled | |
863 | */ | |
864 | static void s5p_hash_irq_disable(struct s5p_aes_dev *dev, u32 flags) | |
865 | { | |
866 | SSS_WRITE(dev, FCINTENCLR, flags); | |
867 | } | |
868 | ||
869 | /** | |
870 | * s5p_hash_irq_enable() - enable irq signals | |
871 | * @dev: secss device | |
872 | * @flags: bitfield with irq's to be enabled | |
873 | */ | |
874 | static void s5p_hash_irq_enable(struct s5p_aes_dev *dev, int flags) | |
875 | { | |
876 | SSS_WRITE(dev, FCINTENSET, flags); | |
877 | } | |
878 | ||
879 | /** | |
880 | * s5p_hash_set_flow() - set flow inside SecSS AES/DES with/without HASH | |
881 | * @dev: secss device | |
882 | * @hashflow: HASH stream flow with/without crypto AES/DES | |
883 | */ | |
884 | static void s5p_hash_set_flow(struct s5p_aes_dev *dev, u32 hashflow) | |
885 | { | |
886 | unsigned long flags; | |
887 | u32 flow; | |
888 | ||
889 | spin_lock_irqsave(&dev->lock, flags); | |
890 | ||
891 | flow = SSS_READ(dev, FCFIFOCTRL); | |
892 | flow &= ~SSS_HASHIN_MASK; | |
893 | flow |= hashflow; | |
894 | SSS_WRITE(dev, FCFIFOCTRL, flow); | |
895 | ||
896 | spin_unlock_irqrestore(&dev->lock, flags); | |
897 | } | |
898 | ||
899 | /** | |
900 | * s5p_ahash_dma_init() - enable DMA and set HASH flow inside SecSS | |
901 | * @dev: secss device | |
902 | * @hashflow: HASH stream flow with/without AES/DES | |
903 | * | |
904 | * flush HASH DMA and enable DMA, set HASH stream flow inside SecSS HW, | |
905 | * enable HASH irq's HRDMA, HDONE, HPART | |
906 | */ | |
907 | static void s5p_ahash_dma_init(struct s5p_aes_dev *dev, u32 hashflow) | |
908 | { | |
909 | s5p_hash_irq_disable(dev, SSS_FCINTENCLR_HRDMAINTENCLR | | |
910 | SSS_FCINTENCLR_HDONEINTENCLR | | |
911 | SSS_FCINTENCLR_HPARTINTENCLR); | |
912 | s5p_hash_dma_flush(dev); | |
913 | ||
914 | s5p_hash_dma_enable(dev); | |
915 | s5p_hash_set_flow(dev, hashflow & SSS_HASHIN_MASK); | |
916 | s5p_hash_irq_enable(dev, SSS_FCINTENSET_HRDMAINTENSET | | |
917 | SSS_FCINTENSET_HDONEINTENSET | | |
918 | SSS_FCINTENSET_HPARTINTENSET); | |
919 | } | |
920 | ||
921 | /** | |
922 | * s5p_hash_write_ctrl() - prepare HASH block in SecSS for processing | |
923 | * @dd: secss device | |
924 | * @length: length for request | |
925 | * @final: true if final op | |
926 | * | |
927 | * Prepare SSS HASH block for processing bytes in DMA mode. If it is called | |
928 | * after previous updates, fill up IV words. For final, calculate and set | |
929 | * lengths for HASH so SecSS can finalize hash. For partial, set SSS HASH | |
930 | * length as 2^63 so it will be never reached and set to zero prelow and | |
931 | * prehigh. | |
932 | * | |
933 | * This function does not start DMA transfer. | |
934 | */ | |
935 | static void s5p_hash_write_ctrl(struct s5p_aes_dev *dd, size_t length, | |
936 | bool final) | |
937 | { | |
938 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req); | |
939 | u32 prelow, prehigh, low, high; | |
940 | u32 configflags, swapflags; | |
941 | u64 tmplen; | |
942 | ||
943 | configflags = ctx->engine | SSS_HASH_INIT_BIT; | |
944 | ||
945 | if (likely(ctx->digcnt)) { | |
946 | s5p_hash_write_ctx_iv(dd, ctx); | |
947 | configflags |= SSS_HASH_USER_IV_EN; | |
948 | } | |
949 | ||
950 | if (final) { | |
951 | /* number of bytes for last part */ | |
952 | low = length; | |
953 | high = 0; | |
954 | /* total number of bits prev hashed */ | |
955 | tmplen = ctx->digcnt * 8; | |
956 | prelow = (u32)tmplen; | |
957 | prehigh = (u32)(tmplen >> 32); | |
958 | } else { | |
959 | prelow = 0; | |
960 | prehigh = 0; | |
961 | low = 0; | |
962 | high = BIT(31); | |
963 | } | |
964 | ||
965 | swapflags = SSS_HASH_BYTESWAP_DI | SSS_HASH_BYTESWAP_DO | | |
966 | SSS_HASH_BYTESWAP_IV | SSS_HASH_BYTESWAP_KEY; | |
967 | ||
968 | s5p_hash_write(dd, SSS_REG_HASH_MSG_SIZE_LOW, low); | |
969 | s5p_hash_write(dd, SSS_REG_HASH_MSG_SIZE_HIGH, high); | |
970 | s5p_hash_write(dd, SSS_REG_HASH_PRE_MSG_SIZE_LOW, prelow); | |
971 | s5p_hash_write(dd, SSS_REG_HASH_PRE_MSG_SIZE_HIGH, prehigh); | |
972 | ||
973 | s5p_hash_write(dd, SSS_REG_HASH_CTRL_SWAP, swapflags); | |
974 | s5p_hash_write(dd, SSS_REG_HASH_CTRL, configflags); | |
975 | } | |
976 | ||
977 | /** | |
978 | * s5p_hash_xmit_dma() - start DMA hash processing | |
979 | * @dd: secss device | |
980 | * @length: length for request | |
981 | * @final: true if final op | |
982 | * | |
983 | * Update digcnt here, as it is needed for finup/final op. | |
984 | */ | |
985 | static int s5p_hash_xmit_dma(struct s5p_aes_dev *dd, size_t length, | |
986 | bool final) | |
987 | { | |
988 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req); | |
989 | unsigned int cnt; | |
990 | ||
991 | cnt = dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE); | |
992 | if (!cnt) { | |
993 | dev_err(dd->dev, "dma_map_sg error\n"); | |
994 | ctx->error = true; | |
995 | return -EINVAL; | |
996 | } | |
997 | ||
998 | set_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags); | |
999 | dd->hash_sg_iter = ctx->sg; | |
1000 | dd->hash_sg_cnt = cnt; | |
1001 | s5p_hash_write_ctrl(dd, length, final); | |
1002 | ctx->digcnt += length; | |
1003 | ctx->total -= length; | |
1004 | ||
1005 | /* catch last interrupt */ | |
1006 | if (final) | |
1007 | set_bit(HASH_FLAGS_FINAL, &dd->hash_flags); | |
1008 | ||
1009 | s5p_set_dma_hashdata(dd, dd->hash_sg_iter); /* DMA starts */ | |
1010 | ||
1011 | return -EINPROGRESS; | |
1012 | } | |
1013 | ||
1014 | /** | |
1015 | * s5p_hash_copy_sgs() - copy request's bytes into new buffer | |
1016 | * @ctx: request context | |
1017 | * @sg: source scatterlist request | |
1018 | * @new_len: number of bytes to process from sg | |
1019 | * | |
1020 | * Allocate new buffer, copy data for HASH into it. If there was xmit_buf | |
1021 | * filled, copy it first, then copy data from sg into it. Prepare one sgl[0] | |
1022 | * with allocated buffer. | |
1023 | * | |
1024 | * Set bit in dd->hash_flag so we can free it after irq ends processing. | |
1025 | */ | |
1026 | static int s5p_hash_copy_sgs(struct s5p_hash_reqctx *ctx, | |
1027 | struct scatterlist *sg, unsigned int new_len) | |
1028 | { | |
1029 | unsigned int pages, len; | |
1030 | void *buf; | |
1031 | ||
1032 | len = new_len + ctx->bufcnt; | |
1033 | pages = get_order(len); | |
1034 | ||
1035 | buf = (void *)__get_free_pages(GFP_ATOMIC, pages); | |
1036 | if (!buf) { | |
1037 | dev_err(ctx->dd->dev, "alloc pages for unaligned case.\n"); | |
1038 | ctx->error = true; | |
1039 | return -ENOMEM; | |
1040 | } | |
1041 | ||
1042 | if (ctx->bufcnt) | |
1043 | memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt); | |
1044 | ||
1045 | scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->skip, | |
1046 | new_len, 0); | |
1047 | sg_init_table(ctx->sgl, 1); | |
1048 | sg_set_buf(ctx->sgl, buf, len); | |
1049 | ctx->sg = ctx->sgl; | |
1050 | ctx->sg_len = 1; | |
1051 | ctx->bufcnt = 0; | |
1052 | ctx->skip = 0; | |
1053 | set_bit(HASH_FLAGS_SGS_COPIED, &ctx->dd->hash_flags); | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | /** | |
1059 | * s5p_hash_copy_sg_lists() - copy sg list and make fixes in copy | |
1060 | * @ctx: request context | |
1061 | * @sg: source scatterlist request | |
1062 | * @new_len: number of bytes to process from sg | |
1063 | * | |
1064 | * Allocate new scatterlist table, copy data for HASH into it. If there was | |
1065 | * xmit_buf filled, prepare it first, then copy page, length and offset from | |
1066 | * source sg into it, adjusting begin and/or end for skip offset and | |
1067 | * hash_later value. | |
1068 | * | |
1069 | * Resulting sg table will be assigned to ctx->sg. Set flag so we can free | |
1070 | * it after irq ends processing. | |
1071 | */ | |
1072 | static int s5p_hash_copy_sg_lists(struct s5p_hash_reqctx *ctx, | |
1073 | struct scatterlist *sg, unsigned int new_len) | |
1074 | { | |
1075 | unsigned int skip = ctx->skip, n = sg_nents(sg); | |
1076 | struct scatterlist *tmp; | |
1077 | unsigned int len; | |
1078 | ||
1079 | if (ctx->bufcnt) | |
1080 | n++; | |
1081 | ||
1082 | ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL); | |
1083 | if (!ctx->sg) { | |
1084 | ctx->error = true; | |
1085 | return -ENOMEM; | |
1086 | } | |
1087 | ||
1088 | sg_init_table(ctx->sg, n); | |
1089 | ||
1090 | tmp = ctx->sg; | |
1091 | ||
1092 | ctx->sg_len = 0; | |
1093 | ||
1094 | if (ctx->bufcnt) { | |
1095 | sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt); | |
1096 | tmp = sg_next(tmp); | |
1097 | ctx->sg_len++; | |
1098 | } | |
1099 | ||
1100 | while (sg && skip >= sg->length) { | |
1101 | skip -= sg->length; | |
1102 | sg = sg_next(sg); | |
1103 | } | |
1104 | ||
1105 | while (sg && new_len) { | |
1106 | len = sg->length - skip; | |
1107 | if (new_len < len) | |
1108 | len = new_len; | |
1109 | ||
1110 | new_len -= len; | |
1111 | sg_set_page(tmp, sg_page(sg), len, sg->offset + skip); | |
1112 | skip = 0; | |
1113 | if (new_len <= 0) | |
1114 | sg_mark_end(tmp); | |
1115 | ||
1116 | tmp = sg_next(tmp); | |
1117 | ctx->sg_len++; | |
1118 | sg = sg_next(sg); | |
1119 | } | |
1120 | ||
1121 | set_bit(HASH_FLAGS_SGS_ALLOCED, &ctx->dd->hash_flags); | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | /** | |
1127 | * s5p_hash_prepare_sgs() - prepare sg for processing | |
1128 | * @ctx: request context | |
1129 | * @sg: source scatterlist request | |
98a6bc10 | 1130 | * @new_len: number of bytes to process from sg |
c2afad6c KK |
1131 | * @final: final flag |
1132 | * | |
1133 | * Check two conditions: (1) if buffers in sg have len aligned data, and (2) | |
1134 | * sg table have good aligned elements (list_ok). If one of this checks fails, | |
1135 | * then either (1) allocates new buffer for data with s5p_hash_copy_sgs, copy | |
1136 | * data into this buffer and prepare request in sgl, or (2) allocates new sg | |
1137 | * table and prepare sg elements. | |
1138 | * | |
1139 | * For digest or finup all conditions can be good, and we may not need any | |
1140 | * fixes. | |
1141 | */ | |
1142 | static int s5p_hash_prepare_sgs(struct s5p_hash_reqctx *ctx, | |
1143 | struct scatterlist *sg, | |
1144 | unsigned int new_len, bool final) | |
1145 | { | |
1146 | unsigned int skip = ctx->skip, nbytes = new_len, n = 0; | |
1147 | bool aligned = true, list_ok = true; | |
1148 | struct scatterlist *sg_tmp = sg; | |
1149 | ||
1150 | if (!sg || !sg->length || !new_len) | |
1151 | return 0; | |
1152 | ||
1153 | if (skip || !final) | |
1154 | list_ok = false; | |
1155 | ||
1156 | while (nbytes > 0 && sg_tmp) { | |
1157 | n++; | |
1158 | if (skip >= sg_tmp->length) { | |
1159 | skip -= sg_tmp->length; | |
1160 | if (!sg_tmp->length) { | |
1161 | aligned = false; | |
1162 | break; | |
1163 | } | |
1164 | } else { | |
1165 | if (!IS_ALIGNED(sg_tmp->length - skip, BUFLEN)) { | |
1166 | aligned = false; | |
1167 | break; | |
1168 | } | |
1169 | ||
1170 | if (nbytes < sg_tmp->length - skip) { | |
1171 | list_ok = false; | |
1172 | break; | |
1173 | } | |
1174 | ||
1175 | nbytes -= sg_tmp->length - skip; | |
1176 | skip = 0; | |
1177 | } | |
1178 | ||
1179 | sg_tmp = sg_next(sg_tmp); | |
1180 | } | |
1181 | ||
1182 | if (!aligned) | |
1183 | return s5p_hash_copy_sgs(ctx, sg, new_len); | |
1184 | else if (!list_ok) | |
1185 | return s5p_hash_copy_sg_lists(ctx, sg, new_len); | |
1186 | ||
1187 | /* | |
1188 | * Have aligned data from previous operation and/or current | |
1189 | * Note: will enter here only if (digest or finup) and aligned | |
1190 | */ | |
1191 | if (ctx->bufcnt) { | |
1192 | ctx->sg_len = n; | |
1193 | sg_init_table(ctx->sgl, 2); | |
1194 | sg_set_buf(ctx->sgl, ctx->dd->xmit_buf, ctx->bufcnt); | |
1195 | sg_chain(ctx->sgl, 2, sg); | |
1196 | ctx->sg = ctx->sgl; | |
1197 | ctx->sg_len++; | |
1198 | } else { | |
1199 | ctx->sg = sg; | |
1200 | ctx->sg_len = n; | |
1201 | } | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | /** | |
1207 | * s5p_hash_prepare_request() - prepare request for processing | |
1208 | * @req: AHASH request | |
1209 | * @update: true if UPDATE op | |
1210 | * | |
1211 | * Note 1: we can have update flag _and_ final flag at the same time. | |
1212 | * Note 2: we enter here when digcnt > BUFLEN (=HASH_BLOCK_SIZE) or | |
1213 | * either req->nbytes or ctx->bufcnt + req->nbytes is > BUFLEN or | |
1214 | * we have final op | |
1215 | */ | |
1216 | static int s5p_hash_prepare_request(struct ahash_request *req, bool update) | |
1217 | { | |
1218 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1219 | bool final = ctx->finup; | |
1220 | int xmit_len, hash_later, nbytes; | |
1221 | int ret; | |
1222 | ||
c2afad6c KK |
1223 | if (update) |
1224 | nbytes = req->nbytes; | |
1225 | else | |
1226 | nbytes = 0; | |
1227 | ||
1228 | ctx->total = nbytes + ctx->bufcnt; | |
1229 | if (!ctx->total) | |
1230 | return 0; | |
1231 | ||
1232 | if (nbytes && (!IS_ALIGNED(ctx->bufcnt, BUFLEN))) { | |
1233 | /* bytes left from previous request, so fill up to BUFLEN */ | |
1234 | int len = BUFLEN - ctx->bufcnt % BUFLEN; | |
1235 | ||
1236 | if (len > nbytes) | |
1237 | len = nbytes; | |
1238 | ||
1239 | scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src, | |
1240 | 0, len, 0); | |
1241 | ctx->bufcnt += len; | |
1242 | nbytes -= len; | |
1243 | ctx->skip = len; | |
1244 | } else { | |
1245 | ctx->skip = 0; | |
1246 | } | |
1247 | ||
1248 | if (ctx->bufcnt) | |
1249 | memcpy(ctx->dd->xmit_buf, ctx->buffer, ctx->bufcnt); | |
1250 | ||
1251 | xmit_len = ctx->total; | |
1252 | if (final) { | |
1253 | hash_later = 0; | |
1254 | } else { | |
1255 | if (IS_ALIGNED(xmit_len, BUFLEN)) | |
1256 | xmit_len -= BUFLEN; | |
1257 | else | |
1258 | xmit_len -= xmit_len & (BUFLEN - 1); | |
1259 | ||
1260 | hash_later = ctx->total - xmit_len; | |
1261 | /* copy hash_later bytes from end of req->src */ | |
1262 | /* previous bytes are in xmit_buf, so no overwrite */ | |
1263 | scatterwalk_map_and_copy(ctx->buffer, req->src, | |
1264 | req->nbytes - hash_later, | |
1265 | hash_later, 0); | |
1266 | } | |
1267 | ||
1268 | if (xmit_len > BUFLEN) { | |
1269 | ret = s5p_hash_prepare_sgs(ctx, req->src, nbytes - hash_later, | |
1270 | final); | |
1271 | if (ret) | |
1272 | return ret; | |
1273 | } else { | |
1274 | /* have buffered data only */ | |
1275 | if (unlikely(!ctx->bufcnt)) { | |
1276 | /* first update didn't fill up buffer */ | |
1277 | scatterwalk_map_and_copy(ctx->dd->xmit_buf, req->src, | |
1278 | 0, xmit_len, 0); | |
1279 | } | |
1280 | ||
1281 | sg_init_table(ctx->sgl, 1); | |
1282 | sg_set_buf(ctx->sgl, ctx->dd->xmit_buf, xmit_len); | |
1283 | ||
1284 | ctx->sg = ctx->sgl; | |
1285 | ctx->sg_len = 1; | |
1286 | } | |
1287 | ||
1288 | ctx->bufcnt = hash_later; | |
1289 | if (!final) | |
1290 | ctx->total = xmit_len; | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | /** | |
1296 | * s5p_hash_update_dma_stop() - unmap DMA | |
1297 | * @dd: secss device | |
1298 | * | |
1299 | * Unmap scatterlist ctx->sg. | |
1300 | */ | |
1301 | static void s5p_hash_update_dma_stop(struct s5p_aes_dev *dd) | |
1302 | { | |
6584eacb | 1303 | const struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req); |
c2afad6c KK |
1304 | |
1305 | dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE); | |
1306 | clear_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags); | |
1307 | } | |
1308 | ||
1309 | /** | |
1310 | * s5p_hash_finish() - copy calculated digest to crypto layer | |
1311 | * @req: AHASH request | |
1312 | */ | |
1313 | static void s5p_hash_finish(struct ahash_request *req) | |
1314 | { | |
1315 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1316 | struct s5p_aes_dev *dd = ctx->dd; | |
1317 | ||
1318 | if (ctx->digcnt) | |
1319 | s5p_hash_copy_result(req); | |
1320 | ||
1321 | dev_dbg(dd->dev, "hash_finish digcnt: %lld\n", ctx->digcnt); | |
1322 | } | |
1323 | ||
1324 | /** | |
1325 | * s5p_hash_finish_req() - finish request | |
1326 | * @req: AHASH request | |
1327 | * @err: error | |
1328 | */ | |
1329 | static void s5p_hash_finish_req(struct ahash_request *req, int err) | |
1330 | { | |
1331 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1332 | struct s5p_aes_dev *dd = ctx->dd; | |
1333 | unsigned long flags; | |
1334 | ||
1335 | if (test_bit(HASH_FLAGS_SGS_COPIED, &dd->hash_flags)) | |
1336 | free_pages((unsigned long)sg_virt(ctx->sg), | |
1337 | get_order(ctx->sg->length)); | |
1338 | ||
1339 | if (test_bit(HASH_FLAGS_SGS_ALLOCED, &dd->hash_flags)) | |
1340 | kfree(ctx->sg); | |
1341 | ||
1342 | ctx->sg = NULL; | |
1343 | dd->hash_flags &= ~(BIT(HASH_FLAGS_SGS_ALLOCED) | | |
1344 | BIT(HASH_FLAGS_SGS_COPIED)); | |
1345 | ||
1346 | if (!err && !ctx->error) { | |
1347 | s5p_hash_read_msg(req); | |
1348 | if (test_bit(HASH_FLAGS_FINAL, &dd->hash_flags)) | |
1349 | s5p_hash_finish(req); | |
1350 | } else { | |
1351 | ctx->error = true; | |
1352 | } | |
1353 | ||
1354 | spin_lock_irqsave(&dd->hash_lock, flags); | |
1355 | dd->hash_flags &= ~(BIT(HASH_FLAGS_BUSY) | BIT(HASH_FLAGS_FINAL) | | |
1356 | BIT(HASH_FLAGS_DMA_READY) | | |
1357 | BIT(HASH_FLAGS_OUTPUT_READY)); | |
1358 | spin_unlock_irqrestore(&dd->hash_lock, flags); | |
1359 | ||
1360 | if (req->base.complete) | |
1361 | req->base.complete(&req->base, err); | |
1362 | } | |
1363 | ||
1364 | /** | |
1365 | * s5p_hash_handle_queue() - handle hash queue | |
1366 | * @dd: device s5p_aes_dev | |
1367 | * @req: AHASH request | |
1368 | * | |
1369 | * If req!=NULL enqueue it on dd->queue, if FLAGS_BUSY is not set on the | |
1370 | * device then processes the first request from the dd->queue | |
1371 | * | |
1372 | * Returns: see s5p_hash_final below. | |
1373 | */ | |
1374 | static int s5p_hash_handle_queue(struct s5p_aes_dev *dd, | |
1375 | struct ahash_request *req) | |
1376 | { | |
1377 | struct crypto_async_request *async_req, *backlog; | |
1378 | struct s5p_hash_reqctx *ctx; | |
1379 | unsigned long flags; | |
1380 | int err = 0, ret = 0; | |
1381 | ||
1382 | retry: | |
1383 | spin_lock_irqsave(&dd->hash_lock, flags); | |
1384 | if (req) | |
1385 | ret = ahash_enqueue_request(&dd->hash_queue, req); | |
1386 | ||
1387 | if (test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) { | |
1388 | spin_unlock_irqrestore(&dd->hash_lock, flags); | |
1389 | return ret; | |
1390 | } | |
1391 | ||
1392 | backlog = crypto_get_backlog(&dd->hash_queue); | |
1393 | async_req = crypto_dequeue_request(&dd->hash_queue); | |
1394 | if (async_req) | |
1395 | set_bit(HASH_FLAGS_BUSY, &dd->hash_flags); | |
1396 | ||
1397 | spin_unlock_irqrestore(&dd->hash_lock, flags); | |
1398 | ||
1399 | if (!async_req) | |
1400 | return ret; | |
1401 | ||
1402 | if (backlog) | |
1403 | backlog->complete(backlog, -EINPROGRESS); | |
1404 | ||
1405 | req = ahash_request_cast(async_req); | |
1406 | dd->hash_req = req; | |
1407 | ctx = ahash_request_ctx(req); | |
1408 | ||
1409 | err = s5p_hash_prepare_request(req, ctx->op_update); | |
1410 | if (err || !ctx->total) | |
1411 | goto out; | |
1412 | ||
1413 | dev_dbg(dd->dev, "handling new req, op_update: %u, nbytes: %d\n", | |
1414 | ctx->op_update, req->nbytes); | |
1415 | ||
1416 | s5p_ahash_dma_init(dd, SSS_HASHIN_INDEPENDENT); | |
1417 | if (ctx->digcnt) | |
1418 | s5p_hash_write_iv(req); /* restore hash IV */ | |
1419 | ||
1420 | if (ctx->op_update) { /* HASH_OP_UPDATE */ | |
1421 | err = s5p_hash_xmit_dma(dd, ctx->total, ctx->finup); | |
1422 | if (err != -EINPROGRESS && ctx->finup && !ctx->error) | |
1423 | /* no final() after finup() */ | |
1424 | err = s5p_hash_xmit_dma(dd, ctx->total, true); | |
1425 | } else { /* HASH_OP_FINAL */ | |
1426 | err = s5p_hash_xmit_dma(dd, ctx->total, true); | |
1427 | } | |
1428 | out: | |
1429 | if (err != -EINPROGRESS) { | |
1430 | /* hash_tasklet_cb will not finish it, so do it here */ | |
1431 | s5p_hash_finish_req(req, err); | |
1432 | req = NULL; | |
1433 | ||
1434 | /* | |
1435 | * Execute next request immediately if there is anything | |
1436 | * in queue. | |
1437 | */ | |
1438 | goto retry; | |
1439 | } | |
1440 | ||
1441 | return ret; | |
1442 | } | |
1443 | ||
1444 | /** | |
1445 | * s5p_hash_tasklet_cb() - hash tasklet | |
1446 | * @data: ptr to s5p_aes_dev | |
1447 | */ | |
1448 | static void s5p_hash_tasklet_cb(unsigned long data) | |
1449 | { | |
1450 | struct s5p_aes_dev *dd = (struct s5p_aes_dev *)data; | |
1451 | ||
1452 | if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) { | |
1453 | s5p_hash_handle_queue(dd, NULL); | |
1454 | return; | |
1455 | } | |
1456 | ||
1457 | if (test_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags)) { | |
1458 | if (test_and_clear_bit(HASH_FLAGS_DMA_ACTIVE, | |
1459 | &dd->hash_flags)) { | |
1460 | s5p_hash_update_dma_stop(dd); | |
1461 | } | |
1462 | ||
1463 | if (test_and_clear_bit(HASH_FLAGS_OUTPUT_READY, | |
1464 | &dd->hash_flags)) { | |
1465 | /* hash or semi-hash ready */ | |
1466 | clear_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags); | |
f7daa715 | 1467 | goto finish; |
c2afad6c KK |
1468 | } |
1469 | } | |
1470 | ||
1471 | return; | |
1472 | ||
1473 | finish: | |
1474 | /* finish curent request */ | |
1475 | s5p_hash_finish_req(dd->hash_req, 0); | |
1476 | ||
1477 | /* If we are not busy, process next req */ | |
1478 | if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) | |
1479 | s5p_hash_handle_queue(dd, NULL); | |
1480 | } | |
1481 | ||
1482 | /** | |
1483 | * s5p_hash_enqueue() - enqueue request | |
1484 | * @req: AHASH request | |
1485 | * @op: operation UPDATE (true) or FINAL (false) | |
1486 | * | |
1487 | * Returns: see s5p_hash_final below. | |
1488 | */ | |
1489 | static int s5p_hash_enqueue(struct ahash_request *req, bool op) | |
1490 | { | |
1491 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1492 | struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm); | |
1493 | ||
1494 | ctx->op_update = op; | |
1495 | ||
1496 | return s5p_hash_handle_queue(tctx->dd, req); | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * s5p_hash_update() - process the hash input data | |
1501 | * @req: AHASH request | |
1502 | * | |
1503 | * If request will fit in buffer, copy it and return immediately | |
1504 | * else enqueue it with OP_UPDATE. | |
1505 | * | |
1506 | * Returns: see s5p_hash_final below. | |
1507 | */ | |
1508 | static int s5p_hash_update(struct ahash_request *req) | |
1509 | { | |
1510 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1511 | ||
1512 | if (!req->nbytes) | |
1513 | return 0; | |
1514 | ||
1515 | if (ctx->bufcnt + req->nbytes <= BUFLEN) { | |
1516 | scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src, | |
1517 | 0, req->nbytes, 0); | |
1518 | ctx->bufcnt += req->nbytes; | |
1519 | return 0; | |
1520 | } | |
1521 | ||
1522 | return s5p_hash_enqueue(req, true); /* HASH_OP_UPDATE */ | |
1523 | } | |
1524 | ||
c2afad6c KK |
1525 | /** |
1526 | * s5p_hash_final() - close up hash and calculate digest | |
1527 | * @req: AHASH request | |
1528 | * | |
1529 | * Note: in final req->src do not have any data, and req->nbytes can be | |
1530 | * non-zero. | |
1531 | * | |
1532 | * If there were no input data processed yet and the buffered hash data is | |
1533 | * less than BUFLEN (64) then calculate the final hash immediately by using | |
1534 | * SW algorithm fallback. | |
1535 | * | |
1536 | * Otherwise enqueues the current AHASH request with OP_FINAL operation op | |
1537 | * and finalize hash message in HW. Note that if digcnt!=0 then there were | |
1538 | * previous update op, so there are always some buffered bytes in ctx->buffer, | |
1539 | * which means that ctx->bufcnt!=0 | |
1540 | * | |
1541 | * Returns: | |
1542 | * 0 if the request has been processed immediately, | |
1543 | * -EINPROGRESS if the operation has been queued for later execution or is set | |
1544 | * to processing by HW, | |
1545 | * -EBUSY if queue is full and request should be resubmitted later, | |
1546 | * other negative values denotes an error. | |
1547 | */ | |
1548 | static int s5p_hash_final(struct ahash_request *req) | |
1549 | { | |
1550 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1551 | ||
1552 | ctx->finup = true; | |
1553 | if (ctx->error) | |
1554 | return -EINVAL; /* uncompleted hash is not needed */ | |
1555 | ||
ecca1ad6 EB |
1556 | if (!ctx->digcnt && ctx->bufcnt < BUFLEN) { |
1557 | struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm); | |
1558 | ||
1559 | return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer, | |
1560 | ctx->bufcnt, req->result); | |
1561 | } | |
c2afad6c KK |
1562 | |
1563 | return s5p_hash_enqueue(req, false); /* HASH_OP_FINAL */ | |
1564 | } | |
1565 | ||
1566 | /** | |
1567 | * s5p_hash_finup() - process last req->src and calculate digest | |
1568 | * @req: AHASH request containing the last update data | |
1569 | * | |
1570 | * Return values: see s5p_hash_final above. | |
1571 | */ | |
1572 | static int s5p_hash_finup(struct ahash_request *req) | |
1573 | { | |
1574 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1575 | int err1, err2; | |
1576 | ||
1577 | ctx->finup = true; | |
1578 | ||
1579 | err1 = s5p_hash_update(req); | |
1580 | if (err1 == -EINPROGRESS || err1 == -EBUSY) | |
1581 | return err1; | |
1582 | ||
1583 | /* | |
1584 | * final() has to be always called to cleanup resources even if | |
1585 | * update() failed, except EINPROGRESS or calculate digest for small | |
1586 | * size | |
1587 | */ | |
1588 | err2 = s5p_hash_final(req); | |
1589 | ||
1590 | return err1 ?: err2; | |
1591 | } | |
1592 | ||
1593 | /** | |
1594 | * s5p_hash_init() - initialize AHASH request contex | |
1595 | * @req: AHASH request | |
1596 | * | |
1597 | * Init async hash request context. | |
1598 | */ | |
1599 | static int s5p_hash_init(struct ahash_request *req) | |
1600 | { | |
1601 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1602 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
1603 | struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm); | |
1604 | ||
1605 | ctx->dd = tctx->dd; | |
1606 | ctx->error = false; | |
1607 | ctx->finup = false; | |
1608 | ctx->bufcnt = 0; | |
1609 | ctx->digcnt = 0; | |
1610 | ctx->total = 0; | |
1611 | ctx->skip = 0; | |
1612 | ||
1613 | dev_dbg(tctx->dd->dev, "init: digest size: %d\n", | |
1614 | crypto_ahash_digestsize(tfm)); | |
1615 | ||
1616 | switch (crypto_ahash_digestsize(tfm)) { | |
1617 | case MD5_DIGEST_SIZE: | |
1618 | ctx->engine = SSS_HASH_ENGINE_MD5; | |
1619 | ctx->nregs = HASH_MD5_MAX_REG; | |
1620 | break; | |
1621 | case SHA1_DIGEST_SIZE: | |
1622 | ctx->engine = SSS_HASH_ENGINE_SHA1; | |
1623 | ctx->nregs = HASH_SHA1_MAX_REG; | |
1624 | break; | |
1625 | case SHA256_DIGEST_SIZE: | |
1626 | ctx->engine = SSS_HASH_ENGINE_SHA256; | |
1627 | ctx->nregs = HASH_SHA256_MAX_REG; | |
1628 | break; | |
1629 | default: | |
1630 | ctx->error = true; | |
1631 | return -EINVAL; | |
1632 | } | |
1633 | ||
1634 | return 0; | |
1635 | } | |
1636 | ||
1637 | /** | |
1638 | * s5p_hash_digest - calculate digest from req->src | |
1639 | * @req: AHASH request | |
1640 | * | |
1641 | * Return values: see s5p_hash_final above. | |
1642 | */ | |
1643 | static int s5p_hash_digest(struct ahash_request *req) | |
1644 | { | |
1645 | return s5p_hash_init(req) ?: s5p_hash_finup(req); | |
1646 | } | |
1647 | ||
1648 | /** | |
1649 | * s5p_hash_cra_init_alg - init crypto alg transformation | |
1650 | * @tfm: crypto transformation | |
1651 | */ | |
1652 | static int s5p_hash_cra_init_alg(struct crypto_tfm *tfm) | |
1653 | { | |
1654 | struct s5p_hash_ctx *tctx = crypto_tfm_ctx(tfm); | |
1655 | const char *alg_name = crypto_tfm_alg_name(tfm); | |
1656 | ||
1657 | tctx->dd = s5p_dev; | |
1658 | /* Allocate a fallback and abort if it failed. */ | |
1659 | tctx->fallback = crypto_alloc_shash(alg_name, 0, | |
1660 | CRYPTO_ALG_NEED_FALLBACK); | |
1661 | if (IS_ERR(tctx->fallback)) { | |
1662 | pr_err("fallback alloc fails for '%s'\n", alg_name); | |
1663 | return PTR_ERR(tctx->fallback); | |
1664 | } | |
1665 | ||
1666 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), | |
1667 | sizeof(struct s5p_hash_reqctx) + BUFLEN); | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | /** | |
1673 | * s5p_hash_cra_init - init crypto tfm | |
1674 | * @tfm: crypto transformation | |
1675 | */ | |
1676 | static int s5p_hash_cra_init(struct crypto_tfm *tfm) | |
1677 | { | |
1678 | return s5p_hash_cra_init_alg(tfm); | |
1679 | } | |
1680 | ||
1681 | /** | |
1682 | * s5p_hash_cra_exit - exit crypto tfm | |
1683 | * @tfm: crypto transformation | |
1684 | * | |
1685 | * free allocated fallback | |
1686 | */ | |
1687 | static void s5p_hash_cra_exit(struct crypto_tfm *tfm) | |
1688 | { | |
1689 | struct s5p_hash_ctx *tctx = crypto_tfm_ctx(tfm); | |
1690 | ||
1691 | crypto_free_shash(tctx->fallback); | |
1692 | tctx->fallback = NULL; | |
1693 | } | |
1694 | ||
1695 | /** | |
1696 | * s5p_hash_export - export hash state | |
1697 | * @req: AHASH request | |
1698 | * @out: buffer for exported state | |
1699 | */ | |
1700 | static int s5p_hash_export(struct ahash_request *req, void *out) | |
1701 | { | |
6584eacb | 1702 | const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); |
c2afad6c KK |
1703 | |
1704 | memcpy(out, ctx, sizeof(*ctx) + ctx->bufcnt); | |
1705 | ||
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | /** | |
1710 | * s5p_hash_import - import hash state | |
1711 | * @req: AHASH request | |
1712 | * @in: buffer with state to be imported from | |
1713 | */ | |
1714 | static int s5p_hash_import(struct ahash_request *req, const void *in) | |
1715 | { | |
1716 | struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); | |
1717 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
1718 | struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm); | |
1719 | const struct s5p_hash_reqctx *ctx_in = in; | |
1720 | ||
1721 | memcpy(ctx, in, sizeof(*ctx) + BUFLEN); | |
1722 | if (ctx_in->bufcnt > BUFLEN) { | |
1723 | ctx->error = true; | |
1724 | return -EINVAL; | |
1725 | } | |
1726 | ||
1727 | ctx->dd = tctx->dd; | |
1728 | ctx->error = false; | |
1729 | ||
1730 | return 0; | |
1731 | } | |
1732 | ||
1733 | static struct ahash_alg algs_sha1_md5_sha256[] = { | |
1734 | { | |
1735 | .init = s5p_hash_init, | |
1736 | .update = s5p_hash_update, | |
1737 | .final = s5p_hash_final, | |
1738 | .finup = s5p_hash_finup, | |
1739 | .digest = s5p_hash_digest, | |
1740 | .export = s5p_hash_export, | |
1741 | .import = s5p_hash_import, | |
1742 | .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN, | |
1743 | .halg.digestsize = SHA1_DIGEST_SIZE, | |
1744 | .halg.base = { | |
1745 | .cra_name = "sha1", | |
1746 | .cra_driver_name = "exynos-sha1", | |
1747 | .cra_priority = 100, | |
6a38f622 | 1748 | .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
c2afad6c KK |
1749 | CRYPTO_ALG_ASYNC | |
1750 | CRYPTO_ALG_NEED_FALLBACK, | |
1751 | .cra_blocksize = HASH_BLOCK_SIZE, | |
1752 | .cra_ctxsize = sizeof(struct s5p_hash_ctx), | |
1753 | .cra_alignmask = SSS_HASH_DMA_ALIGN_MASK, | |
1754 | .cra_module = THIS_MODULE, | |
1755 | .cra_init = s5p_hash_cra_init, | |
1756 | .cra_exit = s5p_hash_cra_exit, | |
1757 | } | |
1758 | }, | |
1759 | { | |
1760 | .init = s5p_hash_init, | |
1761 | .update = s5p_hash_update, | |
1762 | .final = s5p_hash_final, | |
1763 | .finup = s5p_hash_finup, | |
1764 | .digest = s5p_hash_digest, | |
1765 | .export = s5p_hash_export, | |
1766 | .import = s5p_hash_import, | |
1767 | .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN, | |
1768 | .halg.digestsize = MD5_DIGEST_SIZE, | |
1769 | .halg.base = { | |
1770 | .cra_name = "md5", | |
1771 | .cra_driver_name = "exynos-md5", | |
1772 | .cra_priority = 100, | |
6a38f622 | 1773 | .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
c2afad6c KK |
1774 | CRYPTO_ALG_ASYNC | |
1775 | CRYPTO_ALG_NEED_FALLBACK, | |
1776 | .cra_blocksize = HASH_BLOCK_SIZE, | |
1777 | .cra_ctxsize = sizeof(struct s5p_hash_ctx), | |
1778 | .cra_alignmask = SSS_HASH_DMA_ALIGN_MASK, | |
1779 | .cra_module = THIS_MODULE, | |
1780 | .cra_init = s5p_hash_cra_init, | |
1781 | .cra_exit = s5p_hash_cra_exit, | |
1782 | } | |
1783 | }, | |
1784 | { | |
1785 | .init = s5p_hash_init, | |
1786 | .update = s5p_hash_update, | |
1787 | .final = s5p_hash_final, | |
1788 | .finup = s5p_hash_finup, | |
1789 | .digest = s5p_hash_digest, | |
1790 | .export = s5p_hash_export, | |
1791 | .import = s5p_hash_import, | |
1792 | .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN, | |
1793 | .halg.digestsize = SHA256_DIGEST_SIZE, | |
1794 | .halg.base = { | |
1795 | .cra_name = "sha256", | |
1796 | .cra_driver_name = "exynos-sha256", | |
1797 | .cra_priority = 100, | |
6a38f622 | 1798 | .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
c2afad6c KK |
1799 | CRYPTO_ALG_ASYNC | |
1800 | CRYPTO_ALG_NEED_FALLBACK, | |
1801 | .cra_blocksize = HASH_BLOCK_SIZE, | |
1802 | .cra_ctxsize = sizeof(struct s5p_hash_ctx), | |
1803 | .cra_alignmask = SSS_HASH_DMA_ALIGN_MASK, | |
1804 | .cra_module = THIS_MODULE, | |
1805 | .cra_init = s5p_hash_cra_init, | |
1806 | .cra_exit = s5p_hash_cra_exit, | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | }; | |
1811 | ||
a49e490c | 1812 | static void s5p_set_aes(struct s5p_aes_dev *dev, |
cdf640a6 | 1813 | const u8 *key, const u8 *iv, const u8 *ctr, |
6584eacb | 1814 | unsigned int keylen) |
a49e490c VZ |
1815 | { |
1816 | void __iomem *keystart; | |
1817 | ||
8f9702aa | 1818 | if (iv) |
ef5c73b3 KK |
1819 | memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv, |
1820 | AES_BLOCK_SIZE); | |
a49e490c | 1821 | |
cdf640a6 | 1822 | if (ctr) |
ef5c73b3 KK |
1823 | memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_CNT_DATA(0), ctr, |
1824 | AES_BLOCK_SIZE); | |
cdf640a6 | 1825 | |
a49e490c | 1826 | if (keylen == AES_KEYSIZE_256) |
89245107 | 1827 | keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0); |
a49e490c | 1828 | else if (keylen == AES_KEYSIZE_192) |
89245107 | 1829 | keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(2); |
a49e490c | 1830 | else |
89245107 | 1831 | keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(4); |
a49e490c | 1832 | |
1e3012d0 | 1833 | memcpy_toio(keystart, key, keylen); |
a49e490c VZ |
1834 | } |
1835 | ||
9e4a1100 KK |
1836 | static bool s5p_is_sg_aligned(struct scatterlist *sg) |
1837 | { | |
1838 | while (sg) { | |
d1497977 | 1839 | if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) |
9e4a1100 KK |
1840 | return false; |
1841 | sg = sg_next(sg); | |
1842 | } | |
1843 | ||
1844 | return true; | |
1845 | } | |
1846 | ||
1847 | static int s5p_set_indata_start(struct s5p_aes_dev *dev, | |
e6b98ce6 | 1848 | struct skcipher_request *req) |
9e4a1100 KK |
1849 | { |
1850 | struct scatterlist *sg; | |
1851 | int err; | |
1852 | ||
1853 | dev->sg_src_cpy = NULL; | |
1854 | sg = req->src; | |
1855 | if (!s5p_is_sg_aligned(sg)) { | |
1856 | dev_dbg(dev->dev, | |
1857 | "At least one unaligned source scatter list, making a copy\n"); | |
1858 | err = s5p_make_sg_cpy(dev, sg, &dev->sg_src_cpy); | |
1859 | if (err) | |
1860 | return err; | |
1861 | ||
1862 | sg = dev->sg_src_cpy; | |
1863 | } | |
1864 | ||
1865 | err = s5p_set_indata(dev, sg); | |
1866 | if (err) { | |
1867 | s5p_free_sg_cpy(dev, &dev->sg_src_cpy); | |
1868 | return err; | |
1869 | } | |
1870 | ||
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | static int s5p_set_outdata_start(struct s5p_aes_dev *dev, | |
e6b98ce6 | 1875 | struct skcipher_request *req) |
9e4a1100 KK |
1876 | { |
1877 | struct scatterlist *sg; | |
1878 | int err; | |
1879 | ||
1880 | dev->sg_dst_cpy = NULL; | |
1881 | sg = req->dst; | |
1882 | if (!s5p_is_sg_aligned(sg)) { | |
1883 | dev_dbg(dev->dev, | |
1884 | "At least one unaligned dest scatter list, making a copy\n"); | |
1885 | err = s5p_make_sg_cpy(dev, sg, &dev->sg_dst_cpy); | |
1886 | if (err) | |
1887 | return err; | |
1888 | ||
1889 | sg = dev->sg_dst_cpy; | |
1890 | } | |
1891 | ||
1892 | err = s5p_set_outdata(dev, sg); | |
1893 | if (err) { | |
1894 | s5p_free_sg_cpy(dev, &dev->sg_dst_cpy); | |
1895 | return err; | |
1896 | } | |
1897 | ||
1898 | return 0; | |
1899 | } | |
1900 | ||
a49e490c VZ |
1901 | static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) |
1902 | { | |
e6b98ce6 | 1903 | struct skcipher_request *req = dev->req; |
b1b4416f | 1904 | u32 aes_control; |
5318c53d KK |
1905 | unsigned long flags; |
1906 | int err; | |
cdf640a6 | 1907 | u8 *iv, *ctr; |
a49e490c | 1908 | |
cdf640a6 | 1909 | /* This sets bit [13:12] to 00, which selects 128-bit counter */ |
a49e490c VZ |
1910 | aes_control = SSS_AES_KEY_CHANGE_MODE; |
1911 | if (mode & FLAGS_AES_DECRYPT) | |
1912 | aes_control |= SSS_AES_MODE_DECRYPT; | |
1913 | ||
c927b080 | 1914 | if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) { |
a49e490c | 1915 | aes_control |= SSS_AES_CHAIN_MODE_CBC; |
e6b98ce6 | 1916 | iv = req->iv; |
cdf640a6 | 1917 | ctr = NULL; |
c927b080 | 1918 | } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) { |
a49e490c | 1919 | aes_control |= SSS_AES_CHAIN_MODE_CTR; |
cdf640a6 | 1920 | iv = NULL; |
e6b98ce6 | 1921 | ctr = req->iv; |
c927b080 KK |
1922 | } else { |
1923 | iv = NULL; /* AES_ECB */ | |
cdf640a6 | 1924 | ctr = NULL; |
c927b080 | 1925 | } |
a49e490c VZ |
1926 | |
1927 | if (dev->ctx->keylen == AES_KEYSIZE_192) | |
1928 | aes_control |= SSS_AES_KEY_SIZE_192; | |
1929 | else if (dev->ctx->keylen == AES_KEYSIZE_256) | |
1930 | aes_control |= SSS_AES_KEY_SIZE_256; | |
1931 | ||
1932 | aes_control |= SSS_AES_FIFO_MODE; | |
1933 | ||
1934 | /* as a variant it is possible to use byte swapping on DMA side */ | |
1935 | aes_control |= SSS_AES_BYTESWAP_DI | |
1936 | | SSS_AES_BYTESWAP_DO | |
1937 | | SSS_AES_BYTESWAP_IV | |
1938 | | SSS_AES_BYTESWAP_KEY | |
1939 | | SSS_AES_BYTESWAP_CNT; | |
1940 | ||
1941 | spin_lock_irqsave(&dev->lock, flags); | |
1942 | ||
1943 | SSS_WRITE(dev, FCINTENCLR, | |
1944 | SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR); | |
1945 | SSS_WRITE(dev, FCFIFOCTRL, 0x00); | |
1946 | ||
9e4a1100 | 1947 | err = s5p_set_indata_start(dev, req); |
a49e490c VZ |
1948 | if (err) |
1949 | goto indata_error; | |
1950 | ||
9e4a1100 | 1951 | err = s5p_set_outdata_start(dev, req); |
a49e490c VZ |
1952 | if (err) |
1953 | goto outdata_error; | |
1954 | ||
89245107 | 1955 | SSS_AES_WRITE(dev, AES_CONTROL, aes_control); |
cdf640a6 | 1956 | s5p_set_aes(dev, dev->ctx->aes_key, iv, ctr, dev->ctx->keylen); |
a49e490c | 1957 | |
9e4a1100 KK |
1958 | s5p_set_dma_indata(dev, dev->sg_src); |
1959 | s5p_set_dma_outdata(dev, dev->sg_dst); | |
a49e490c VZ |
1960 | |
1961 | SSS_WRITE(dev, FCINTENSET, | |
1962 | SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET); | |
1963 | ||
1964 | spin_unlock_irqrestore(&dev->lock, flags); | |
1965 | ||
1966 | return; | |
1967 | ||
119c3ab4 | 1968 | outdata_error: |
a49e490c VZ |
1969 | s5p_unset_indata(dev); |
1970 | ||
119c3ab4 | 1971 | indata_error: |
28b62b14 | 1972 | s5p_sg_done(dev); |
42d5c176 | 1973 | dev->busy = false; |
a49e490c | 1974 | spin_unlock_irqrestore(&dev->lock, flags); |
5842cd44 | 1975 | s5p_aes_complete(req, err); |
a49e490c VZ |
1976 | } |
1977 | ||
1978 | static void s5p_tasklet_cb(unsigned long data) | |
1979 | { | |
1980 | struct s5p_aes_dev *dev = (struct s5p_aes_dev *)data; | |
1981 | struct crypto_async_request *async_req, *backlog; | |
1982 | struct s5p_aes_reqctx *reqctx; | |
1983 | unsigned long flags; | |
1984 | ||
1985 | spin_lock_irqsave(&dev->lock, flags); | |
1986 | backlog = crypto_get_backlog(&dev->queue); | |
1987 | async_req = crypto_dequeue_request(&dev->queue); | |
a49e490c | 1988 | |
dc5e3f19 NKC |
1989 | if (!async_req) { |
1990 | dev->busy = false; | |
1991 | spin_unlock_irqrestore(&dev->lock, flags); | |
a49e490c | 1992 | return; |
dc5e3f19 NKC |
1993 | } |
1994 | spin_unlock_irqrestore(&dev->lock, flags); | |
a49e490c VZ |
1995 | |
1996 | if (backlog) | |
1997 | backlog->complete(backlog, -EINPROGRESS); | |
1998 | ||
e6b98ce6 | 1999 | dev->req = skcipher_request_cast(async_req); |
a49e490c | 2000 | dev->ctx = crypto_tfm_ctx(dev->req->base.tfm); |
e6b98ce6 | 2001 | reqctx = skcipher_request_ctx(dev->req); |
a49e490c VZ |
2002 | |
2003 | s5p_aes_crypt_start(dev, reqctx->mode); | |
2004 | } | |
2005 | ||
2006 | static int s5p_aes_handle_req(struct s5p_aes_dev *dev, | |
e6b98ce6 | 2007 | struct skcipher_request *req) |
a49e490c VZ |
2008 | { |
2009 | unsigned long flags; | |
2010 | int err; | |
2011 | ||
2012 | spin_lock_irqsave(&dev->lock, flags); | |
e6b98ce6 | 2013 | err = crypto_enqueue_request(&dev->queue, &req->base); |
a49e490c | 2014 | if (dev->busy) { |
a49e490c | 2015 | spin_unlock_irqrestore(&dev->lock, flags); |
b1b4416f | 2016 | return err; |
a49e490c VZ |
2017 | } |
2018 | dev->busy = true; | |
2019 | ||
a49e490c VZ |
2020 | spin_unlock_irqrestore(&dev->lock, flags); |
2021 | ||
2022 | tasklet_schedule(&dev->tasklet); | |
2023 | ||
a49e490c VZ |
2024 | return err; |
2025 | } | |
2026 | ||
e6b98ce6 | 2027 | static int s5p_aes_crypt(struct skcipher_request *req, unsigned long mode) |
a49e490c | 2028 | { |
e6b98ce6 AB |
2029 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
2030 | struct s5p_aes_reqctx *reqctx = skcipher_request_ctx(req); | |
2031 | struct s5p_aes_ctx *ctx = crypto_skcipher_ctx(tfm); | |
5318c53d | 2032 | struct s5p_aes_dev *dev = ctx->dev; |
a49e490c | 2033 | |
e6b98ce6 | 2034 | if (!req->cryptlen) |
84a0b00a AB |
2035 | return 0; |
2036 | ||
e6b98ce6 | 2037 | if (!IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE) && |
cdf640a6 | 2038 | ((mode & FLAGS_AES_MODE_MASK) != FLAGS_AES_CTR)) { |
84a0b00a | 2039 | dev_dbg(dev->dev, "request size is not exact amount of AES blocks\n"); |
a49e490c VZ |
2040 | return -EINVAL; |
2041 | } | |
2042 | ||
2043 | reqctx->mode = mode; | |
2044 | ||
2045 | return s5p_aes_handle_req(dev, req); | |
2046 | } | |
2047 | ||
e6b98ce6 | 2048 | static int s5p_aes_setkey(struct crypto_skcipher *cipher, |
b1b4416f | 2049 | const u8 *key, unsigned int keylen) |
a49e490c | 2050 | { |
e6b98ce6 | 2051 | struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher); |
a49e490c VZ |
2052 | struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
2053 | ||
2054 | if (keylen != AES_KEYSIZE_128 && | |
2055 | keylen != AES_KEYSIZE_192 && | |
2056 | keylen != AES_KEYSIZE_256) | |
2057 | return -EINVAL; | |
2058 | ||
2059 | memcpy(ctx->aes_key, key, keylen); | |
2060 | ctx->keylen = keylen; | |
2061 | ||
2062 | return 0; | |
2063 | } | |
2064 | ||
e6b98ce6 | 2065 | static int s5p_aes_ecb_encrypt(struct skcipher_request *req) |
a49e490c VZ |
2066 | { |
2067 | return s5p_aes_crypt(req, 0); | |
2068 | } | |
2069 | ||
e6b98ce6 | 2070 | static int s5p_aes_ecb_decrypt(struct skcipher_request *req) |
a49e490c VZ |
2071 | { |
2072 | return s5p_aes_crypt(req, FLAGS_AES_DECRYPT); | |
2073 | } | |
2074 | ||
e6b98ce6 | 2075 | static int s5p_aes_cbc_encrypt(struct skcipher_request *req) |
a49e490c VZ |
2076 | { |
2077 | return s5p_aes_crypt(req, FLAGS_AES_CBC); | |
2078 | } | |
2079 | ||
e6b98ce6 | 2080 | static int s5p_aes_cbc_decrypt(struct skcipher_request *req) |
a49e490c VZ |
2081 | { |
2082 | return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC); | |
2083 | } | |
2084 | ||
e6b98ce6 | 2085 | static int s5p_aes_ctr_crypt(struct skcipher_request *req) |
cdf640a6 CM |
2086 | { |
2087 | return s5p_aes_crypt(req, FLAGS_AES_CTR); | |
2088 | } | |
2089 | ||
e6b98ce6 | 2090 | static int s5p_aes_init_tfm(struct crypto_skcipher *tfm) |
a49e490c | 2091 | { |
e6b98ce6 | 2092 | struct s5p_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
a49e490c VZ |
2093 | |
2094 | ctx->dev = s5p_dev; | |
e6b98ce6 | 2095 | crypto_skcipher_set_reqsize(tfm, sizeof(struct s5p_aes_reqctx)); |
a49e490c VZ |
2096 | |
2097 | return 0; | |
2098 | } | |
2099 | ||
e6b98ce6 | 2100 | static struct skcipher_alg algs[] = { |
a49e490c | 2101 | { |
e6b98ce6 AB |
2102 | .base.cra_name = "ecb(aes)", |
2103 | .base.cra_driver_name = "ecb-aes-s5p", | |
2104 | .base.cra_priority = 100, | |
2105 | .base.cra_flags = CRYPTO_ALG_ASYNC | | |
d912bb76 | 2106 | CRYPTO_ALG_KERN_DRIVER_ONLY, |
e6b98ce6 AB |
2107 | .base.cra_blocksize = AES_BLOCK_SIZE, |
2108 | .base.cra_ctxsize = sizeof(struct s5p_aes_ctx), | |
2109 | .base.cra_alignmask = 0x0f, | |
2110 | .base.cra_module = THIS_MODULE, | |
2111 | ||
2112 | .min_keysize = AES_MIN_KEY_SIZE, | |
2113 | .max_keysize = AES_MAX_KEY_SIZE, | |
2114 | .setkey = s5p_aes_setkey, | |
2115 | .encrypt = s5p_aes_ecb_encrypt, | |
2116 | .decrypt = s5p_aes_ecb_decrypt, | |
2117 | .init = s5p_aes_init_tfm, | |
a49e490c VZ |
2118 | }, |
2119 | { | |
e6b98ce6 AB |
2120 | .base.cra_name = "cbc(aes)", |
2121 | .base.cra_driver_name = "cbc-aes-s5p", | |
2122 | .base.cra_priority = 100, | |
2123 | .base.cra_flags = CRYPTO_ALG_ASYNC | | |
d912bb76 | 2124 | CRYPTO_ALG_KERN_DRIVER_ONLY, |
e6b98ce6 AB |
2125 | .base.cra_blocksize = AES_BLOCK_SIZE, |
2126 | .base.cra_ctxsize = sizeof(struct s5p_aes_ctx), | |
2127 | .base.cra_alignmask = 0x0f, | |
2128 | .base.cra_module = THIS_MODULE, | |
2129 | ||
2130 | .min_keysize = AES_MIN_KEY_SIZE, | |
2131 | .max_keysize = AES_MAX_KEY_SIZE, | |
2132 | .ivsize = AES_BLOCK_SIZE, | |
2133 | .setkey = s5p_aes_setkey, | |
2134 | .encrypt = s5p_aes_cbc_encrypt, | |
2135 | .decrypt = s5p_aes_cbc_decrypt, | |
2136 | .init = s5p_aes_init_tfm, | |
a49e490c | 2137 | }, |
cdf640a6 | 2138 | { |
e6b98ce6 AB |
2139 | .base.cra_name = "ctr(aes)", |
2140 | .base.cra_driver_name = "ctr-aes-s5p", | |
2141 | .base.cra_priority = 100, | |
2142 | .base.cra_flags = CRYPTO_ALG_ASYNC | | |
cdf640a6 | 2143 | CRYPTO_ALG_KERN_DRIVER_ONLY, |
e6b98ce6 AB |
2144 | .base.cra_blocksize = 1, |
2145 | .base.cra_ctxsize = sizeof(struct s5p_aes_ctx), | |
2146 | .base.cra_alignmask = 0x0f, | |
2147 | .base.cra_module = THIS_MODULE, | |
2148 | ||
2149 | .min_keysize = AES_MIN_KEY_SIZE, | |
2150 | .max_keysize = AES_MAX_KEY_SIZE, | |
2151 | .ivsize = AES_BLOCK_SIZE, | |
2152 | .setkey = s5p_aes_setkey, | |
2153 | .encrypt = s5p_aes_ctr_crypt, | |
2154 | .decrypt = s5p_aes_ctr_crypt, | |
2155 | .init = s5p_aes_init_tfm, | |
cdf640a6 | 2156 | }, |
a49e490c VZ |
2157 | }; |
2158 | ||
2159 | static int s5p_aes_probe(struct platform_device *pdev) | |
2160 | { | |
5318c53d KK |
2161 | struct device *dev = &pdev->dev; |
2162 | int i, j, err = -ENODEV; | |
6584eacb | 2163 | const struct samsung_aes_variant *variant; |
5318c53d KK |
2164 | struct s5p_aes_dev *pdata; |
2165 | struct resource *res; | |
c2afad6c | 2166 | unsigned int hash_i; |
a49e490c VZ |
2167 | |
2168 | if (s5p_dev) | |
2169 | return -EEXIST; | |
2170 | ||
a49e490c VZ |
2171 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
2172 | if (!pdata) | |
2173 | return -ENOMEM; | |
2174 | ||
c2afad6c | 2175 | variant = find_s5p_sss_version(pdev); |
0fdefe2c | 2176 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
a49e490c | 2177 | |
c2afad6c KK |
2178 | /* |
2179 | * Note: HASH and PRNG uses the same registers in secss, avoid | |
2180 | * overwrite each other. This will drop HASH when CONFIG_EXYNOS_RNG | |
2181 | * is enabled in config. We need larger size for HASH registers in | |
2182 | * secss, current describe only AES/DES | |
2183 | */ | |
2184 | if (IS_ENABLED(CONFIG_CRYPTO_DEV_EXYNOS_HASH)) { | |
2185 | if (variant == &exynos_aes_data) { | |
2186 | res->end += 0x300; | |
2187 | pdata->use_hash = true; | |
2188 | } | |
2189 | } | |
2190 | ||
2191 | pdata->res = res; | |
2192 | pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res); | |
2193 | if (IS_ERR(pdata->ioaddr)) { | |
2194 | if (!pdata->use_hash) | |
2195 | return PTR_ERR(pdata->ioaddr); | |
2196 | /* try AES without HASH */ | |
2197 | res->end -= 0x300; | |
2198 | pdata->use_hash = false; | |
2199 | pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res); | |
2200 | if (IS_ERR(pdata->ioaddr)) | |
2201 | return PTR_ERR(pdata->ioaddr); | |
2202 | } | |
89245107 | 2203 | |
0918f18c | 2204 | pdata->clk = devm_clk_get(dev, variant->clk_names[0]); |
b7da560e KK |
2205 | if (IS_ERR(pdata->clk)) |
2206 | return dev_err_probe(dev, PTR_ERR(pdata->clk), | |
2207 | "failed to find secss clock %s\n", | |
2208 | variant->clk_names[0]); | |
a49e490c | 2209 | |
c1eb7ef2 NKC |
2210 | err = clk_prepare_enable(pdata->clk); |
2211 | if (err < 0) { | |
0918f18c KK |
2212 | dev_err(dev, "Enabling clock %s failed, err %d\n", |
2213 | variant->clk_names[0], err); | |
c1eb7ef2 NKC |
2214 | return err; |
2215 | } | |
a49e490c | 2216 | |
0918f18c KK |
2217 | if (variant->clk_names[1]) { |
2218 | pdata->pclk = devm_clk_get(dev, variant->clk_names[1]); | |
2219 | if (IS_ERR(pdata->pclk)) { | |
b7da560e KK |
2220 | err = dev_err_probe(dev, PTR_ERR(pdata->pclk), |
2221 | "failed to find clock %s\n", | |
2222 | variant->clk_names[1]); | |
0918f18c KK |
2223 | goto err_clk; |
2224 | } | |
2225 | ||
2226 | err = clk_prepare_enable(pdata->pclk); | |
2227 | if (err < 0) { | |
2228 | dev_err(dev, "Enabling clock %s failed, err %d\n", | |
2229 | variant->clk_names[0], err); | |
2230 | goto err_clk; | |
2231 | } | |
2232 | } else { | |
2233 | pdata->pclk = NULL; | |
2234 | } | |
2235 | ||
a49e490c | 2236 | spin_lock_init(&pdata->lock); |
c2afad6c | 2237 | spin_lock_init(&pdata->hash_lock); |
a49e490c | 2238 | |
89245107 | 2239 | pdata->aes_ioaddr = pdata->ioaddr + variant->aes_offset; |
c2afad6c | 2240 | pdata->io_hash_base = pdata->ioaddr + variant->hash_offset; |
89245107 | 2241 | |
96fc70b6 NKC |
2242 | pdata->irq_fc = platform_get_irq(pdev, 0); |
2243 | if (pdata->irq_fc < 0) { | |
2244 | err = pdata->irq_fc; | |
2245 | dev_warn(dev, "feed control interrupt is not available.\n"); | |
a49e490c VZ |
2246 | goto err_irq; |
2247 | } | |
07de4bc8 KK |
2248 | err = devm_request_threaded_irq(dev, pdata->irq_fc, NULL, |
2249 | s5p_aes_interrupt, IRQF_ONESHOT, | |
2250 | pdev->name, pdev); | |
a49e490c | 2251 | if (err < 0) { |
96fc70b6 | 2252 | dev_warn(dev, "feed control interrupt is not available.\n"); |
a49e490c VZ |
2253 | goto err_irq; |
2254 | } | |
2255 | ||
dc5e3f19 | 2256 | pdata->busy = false; |
a49e490c VZ |
2257 | pdata->dev = dev; |
2258 | platform_set_drvdata(pdev, pdata); | |
2259 | s5p_dev = pdata; | |
2260 | ||
2261 | tasklet_init(&pdata->tasklet, s5p_tasklet_cb, (unsigned long)pdata); | |
2262 | crypto_init_queue(&pdata->queue, CRYPTO_QUEUE_LEN); | |
2263 | ||
2264 | for (i = 0; i < ARRAY_SIZE(algs); i++) { | |
e6b98ce6 | 2265 | err = crypto_register_skcipher(&algs[i]); |
a49e490c VZ |
2266 | if (err) |
2267 | goto err_algs; | |
2268 | } | |
2269 | ||
c2afad6c KK |
2270 | if (pdata->use_hash) { |
2271 | tasklet_init(&pdata->hash_tasklet, s5p_hash_tasklet_cb, | |
2272 | (unsigned long)pdata); | |
2273 | crypto_init_queue(&pdata->hash_queue, SSS_HASH_QUEUE_LENGTH); | |
2274 | ||
2275 | for (hash_i = 0; hash_i < ARRAY_SIZE(algs_sha1_md5_sha256); | |
2276 | hash_i++) { | |
2277 | struct ahash_alg *alg; | |
2278 | ||
2279 | alg = &algs_sha1_md5_sha256[hash_i]; | |
2280 | err = crypto_register_ahash(alg); | |
2281 | if (err) { | |
2282 | dev_err(dev, "can't register '%s': %d\n", | |
2283 | alg->halg.base.cra_driver_name, err); | |
2284 | goto err_hash; | |
2285 | } | |
2286 | } | |
2287 | } | |
2288 | ||
313becd1 | 2289 | dev_info(dev, "s5p-sss driver registered\n"); |
a49e490c VZ |
2290 | |
2291 | return 0; | |
2292 | ||
c2afad6c KK |
2293 | err_hash: |
2294 | for (j = hash_i - 1; j >= 0; j--) | |
2295 | crypto_unregister_ahash(&algs_sha1_md5_sha256[j]); | |
2296 | ||
2297 | tasklet_kill(&pdata->hash_tasklet); | |
2298 | res->end -= 0x300; | |
2299 | ||
119c3ab4 | 2300 | err_algs: |
c2afad6c | 2301 | if (i < ARRAY_SIZE(algs)) |
e6b98ce6 | 2302 | dev_err(dev, "can't register '%s': %d\n", algs[i].base.cra_name, |
c2afad6c | 2303 | err); |
a49e490c VZ |
2304 | |
2305 | for (j = 0; j < i; j++) | |
e6b98ce6 | 2306 | crypto_unregister_skcipher(&algs[j]); |
a49e490c VZ |
2307 | |
2308 | tasklet_kill(&pdata->tasklet); | |
2309 | ||
119c3ab4 | 2310 | err_irq: |
7fe99da1 | 2311 | clk_disable_unprepare(pdata->pclk); |
a49e490c | 2312 | |
0918f18c KK |
2313 | err_clk: |
2314 | clk_disable_unprepare(pdata->clk); | |
a49e490c | 2315 | s5p_dev = NULL; |
a49e490c VZ |
2316 | |
2317 | return err; | |
2318 | } | |
2319 | ||
2320 | static int s5p_aes_remove(struct platform_device *pdev) | |
2321 | { | |
2322 | struct s5p_aes_dev *pdata = platform_get_drvdata(pdev); | |
2323 | int i; | |
2324 | ||
2325 | if (!pdata) | |
2326 | return -ENODEV; | |
2327 | ||
2328 | for (i = 0; i < ARRAY_SIZE(algs); i++) | |
e6b98ce6 | 2329 | crypto_unregister_skcipher(&algs[i]); |
a49e490c VZ |
2330 | |
2331 | tasklet_kill(&pdata->tasklet); | |
c2afad6c KK |
2332 | if (pdata->use_hash) { |
2333 | for (i = ARRAY_SIZE(algs_sha1_md5_sha256) - 1; i >= 0; i--) | |
2334 | crypto_unregister_ahash(&algs_sha1_md5_sha256[i]); | |
a49e490c | 2335 | |
c2afad6c KK |
2336 | pdata->res->end -= 0x300; |
2337 | tasklet_kill(&pdata->hash_tasklet); | |
2338 | pdata->use_hash = false; | |
2339 | } | |
a49e490c | 2340 | |
7fe99da1 | 2341 | clk_disable_unprepare(pdata->pclk); |
0918f18c | 2342 | |
c2afad6c | 2343 | clk_disable_unprepare(pdata->clk); |
a49e490c | 2344 | s5p_dev = NULL; |
a49e490c VZ |
2345 | |
2346 | return 0; | |
2347 | } | |
2348 | ||
2349 | static struct platform_driver s5p_aes_crypto = { | |
2350 | .probe = s5p_aes_probe, | |
2351 | .remove = s5p_aes_remove, | |
2352 | .driver = { | |
a49e490c | 2353 | .name = "s5p-secss", |
6b9f16e6 | 2354 | .of_match_table = s5p_sss_dt_match, |
a49e490c VZ |
2355 | }, |
2356 | }; | |
2357 | ||
741e8c2d | 2358 | module_platform_driver(s5p_aes_crypto); |
a49e490c VZ |
2359 | |
2360 | MODULE_DESCRIPTION("S5PV210 AES hw acceleration support."); | |
2361 | MODULE_LICENSE("GPL v2"); | |
2362 | MODULE_AUTHOR("Vladimir Zapolskiy <vzapolskiy@gmail.com>"); | |
c2afad6c | 2363 | MODULE_AUTHOR("Kamil Konieczny <k.konieczny@partner.samsung.com>"); |