Commit | Line | Data |
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5de88752 JM |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Support for SAHARA cryptographic accelerator. | |
5 | * | |
5a2bb93f | 6 | * Copyright (c) 2014 Steffen Trumtrar <s.trumtrar@pengutronix.de> |
5de88752 JM |
7 | * Copyright (c) 2013 Vista Silicon S.L. |
8 | * Author: Javier Martin <javier.martin@vista-silicon.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as published | |
12 | * by the Free Software Foundation. | |
13 | * | |
14 | * Based on omap-aes.c and tegra-aes.c | |
15 | */ | |
16 | ||
17 | #include <crypto/algapi.h> | |
18 | #include <crypto/aes.h> | |
5a2bb93f ST |
19 | #include <crypto/hash.h> |
20 | #include <crypto/internal/hash.h> | |
21 | #include <crypto/scatterwalk.h> | |
22 | #include <crypto/sha.h> | |
5de88752 JM |
23 | |
24 | #include <linux/clk.h> | |
25 | #include <linux/crypto.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/io.h> | |
28 | #include <linux/irq.h> | |
29 | #include <linux/kernel.h> | |
c0c3c89a | 30 | #include <linux/kthread.h> |
5de88752 | 31 | #include <linux/module.h> |
c0c3c89a | 32 | #include <linux/mutex.h> |
5de88752 | 33 | #include <linux/of.h> |
5ed903b3 | 34 | #include <linux/of_device.h> |
5de88752 JM |
35 | #include <linux/platform_device.h> |
36 | ||
5a2bb93f ST |
37 | #define SHA_BUFFER_LEN PAGE_SIZE |
38 | #define SAHARA_MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE | |
39 | ||
5de88752 JM |
40 | #define SAHARA_NAME "sahara" |
41 | #define SAHARA_VERSION_3 3 | |
5ed903b3 | 42 | #define SAHARA_VERSION_4 4 |
5de88752 JM |
43 | #define SAHARA_TIMEOUT_MS 1000 |
44 | #define SAHARA_MAX_HW_DESC 2 | |
45 | #define SAHARA_MAX_HW_LINK 20 | |
46 | ||
47 | #define FLAGS_MODE_MASK 0x000f | |
48 | #define FLAGS_ENCRYPT BIT(0) | |
49 | #define FLAGS_CBC BIT(1) | |
50 | #define FLAGS_NEW_KEY BIT(3) | |
5de88752 JM |
51 | |
52 | #define SAHARA_HDR_BASE 0x00800000 | |
53 | #define SAHARA_HDR_SKHA_ALG_AES 0 | |
54 | #define SAHARA_HDR_SKHA_OP_ENC (1 << 2) | |
55 | #define SAHARA_HDR_SKHA_MODE_ECB (0 << 3) | |
56 | #define SAHARA_HDR_SKHA_MODE_CBC (1 << 3) | |
57 | #define SAHARA_HDR_FORM_DATA (5 << 16) | |
58 | #define SAHARA_HDR_FORM_KEY (8 << 16) | |
59 | #define SAHARA_HDR_LLO (1 << 24) | |
60 | #define SAHARA_HDR_CHA_SKHA (1 << 28) | |
61 | #define SAHARA_HDR_CHA_MDHA (2 << 28) | |
62 | #define SAHARA_HDR_PARITY_BIT (1 << 31) | |
63 | ||
5a2bb93f ST |
64 | #define SAHARA_HDR_MDHA_SET_MODE_MD_KEY 0x20880000 |
65 | #define SAHARA_HDR_MDHA_SET_MODE_HASH 0x208D0000 | |
66 | #define SAHARA_HDR_MDHA_HASH 0xA0850000 | |
67 | #define SAHARA_HDR_MDHA_STORE_DIGEST 0x20820000 | |
68 | #define SAHARA_HDR_MDHA_ALG_SHA1 0 | |
69 | #define SAHARA_HDR_MDHA_ALG_MD5 1 | |
70 | #define SAHARA_HDR_MDHA_ALG_SHA256 2 | |
71 | #define SAHARA_HDR_MDHA_ALG_SHA224 3 | |
72 | #define SAHARA_HDR_MDHA_PDATA (1 << 2) | |
73 | #define SAHARA_HDR_MDHA_HMAC (1 << 3) | |
74 | #define SAHARA_HDR_MDHA_INIT (1 << 5) | |
75 | #define SAHARA_HDR_MDHA_IPAD (1 << 6) | |
76 | #define SAHARA_HDR_MDHA_OPAD (1 << 7) | |
77 | #define SAHARA_HDR_MDHA_SWAP (1 << 8) | |
78 | #define SAHARA_HDR_MDHA_MAC_FULL (1 << 9) | |
79 | #define SAHARA_HDR_MDHA_SSL (1 << 10) | |
80 | ||
5de88752 JM |
81 | /* SAHARA can only process one request at a time */ |
82 | #define SAHARA_QUEUE_LENGTH 1 | |
83 | ||
84 | #define SAHARA_REG_VERSION 0x00 | |
85 | #define SAHARA_REG_DAR 0x04 | |
86 | #define SAHARA_REG_CONTROL 0x08 | |
87 | #define SAHARA_CONTROL_SET_THROTTLE(x) (((x) & 0xff) << 24) | |
88 | #define SAHARA_CONTROL_SET_MAXBURST(x) (((x) & 0xff) << 16) | |
89 | #define SAHARA_CONTROL_RNG_AUTORSD (1 << 7) | |
90 | #define SAHARA_CONTROL_ENABLE_INT (1 << 4) | |
91 | #define SAHARA_REG_CMD 0x0C | |
92 | #define SAHARA_CMD_RESET (1 << 0) | |
93 | #define SAHARA_CMD_CLEAR_INT (1 << 8) | |
94 | #define SAHARA_CMD_CLEAR_ERR (1 << 9) | |
95 | #define SAHARA_CMD_SINGLE_STEP (1 << 10) | |
96 | #define SAHARA_CMD_MODE_BATCH (1 << 16) | |
97 | #define SAHARA_CMD_MODE_DEBUG (1 << 18) | |
98 | #define SAHARA_REG_STATUS 0x10 | |
99 | #define SAHARA_STATUS_GET_STATE(x) ((x) & 0x7) | |
100 | #define SAHARA_STATE_IDLE 0 | |
101 | #define SAHARA_STATE_BUSY 1 | |
102 | #define SAHARA_STATE_ERR 2 | |
103 | #define SAHARA_STATE_FAULT 3 | |
104 | #define SAHARA_STATE_COMPLETE 4 | |
105 | #define SAHARA_STATE_COMP_FLAG (1 << 2) | |
106 | #define SAHARA_STATUS_DAR_FULL (1 << 3) | |
107 | #define SAHARA_STATUS_ERROR (1 << 4) | |
108 | #define SAHARA_STATUS_SECURE (1 << 5) | |
109 | #define SAHARA_STATUS_FAIL (1 << 6) | |
110 | #define SAHARA_STATUS_INIT (1 << 7) | |
111 | #define SAHARA_STATUS_RNG_RESEED (1 << 8) | |
112 | #define SAHARA_STATUS_ACTIVE_RNG (1 << 9) | |
113 | #define SAHARA_STATUS_ACTIVE_MDHA (1 << 10) | |
114 | #define SAHARA_STATUS_ACTIVE_SKHA (1 << 11) | |
115 | #define SAHARA_STATUS_MODE_BATCH (1 << 16) | |
116 | #define SAHARA_STATUS_MODE_DEDICATED (1 << 17) | |
117 | #define SAHARA_STATUS_MODE_DEBUG (1 << 18) | |
118 | #define SAHARA_STATUS_GET_ISTATE(x) (((x) >> 24) & 0xff) | |
119 | #define SAHARA_REG_ERRSTATUS 0x14 | |
120 | #define SAHARA_ERRSTATUS_GET_SOURCE(x) ((x) & 0xf) | |
121 | #define SAHARA_ERRSOURCE_CHA 14 | |
122 | #define SAHARA_ERRSOURCE_DMA 15 | |
123 | #define SAHARA_ERRSTATUS_DMA_DIR (1 << 8) | |
124 | #define SAHARA_ERRSTATUS_GET_DMASZ(x)(((x) >> 9) & 0x3) | |
125 | #define SAHARA_ERRSTATUS_GET_DMASRC(x) (((x) >> 13) & 0x7) | |
126 | #define SAHARA_ERRSTATUS_GET_CHASRC(x) (((x) >> 16) & 0xfff) | |
127 | #define SAHARA_ERRSTATUS_GET_CHAERR(x) (((x) >> 28) & 0x3) | |
128 | #define SAHARA_REG_FADDR 0x18 | |
129 | #define SAHARA_REG_CDAR 0x1C | |
130 | #define SAHARA_REG_IDAR 0x20 | |
131 | ||
132 | struct sahara_hw_desc { | |
133 | u32 hdr; | |
134 | u32 len1; | |
135 | dma_addr_t p1; | |
136 | u32 len2; | |
137 | dma_addr_t p2; | |
138 | dma_addr_t next; | |
139 | }; | |
140 | ||
141 | struct sahara_hw_link { | |
142 | u32 len; | |
143 | dma_addr_t p; | |
144 | dma_addr_t next; | |
145 | }; | |
146 | ||
147 | struct sahara_ctx { | |
5de88752 | 148 | unsigned long flags; |
5a2bb93f ST |
149 | |
150 | /* AES-specific context */ | |
5de88752 JM |
151 | int keylen; |
152 | u8 key[AES_KEYSIZE_128]; | |
153 | struct crypto_ablkcipher *fallback; | |
5a2bb93f ST |
154 | |
155 | /* SHA-specific context */ | |
156 | struct crypto_shash *shash_fallback; | |
5de88752 JM |
157 | }; |
158 | ||
159 | struct sahara_aes_reqctx { | |
160 | unsigned long mode; | |
161 | }; | |
162 | ||
5a2bb93f ST |
163 | /* |
164 | * struct sahara_sha_reqctx - private data per request | |
165 | * @buf: holds data for requests smaller than block_size | |
166 | * @rembuf: used to prepare one block_size-aligned request | |
167 | * @context: hw-specific context for request. Digest is extracted from this | |
168 | * @mode: specifies what type of hw-descriptor needs to be built | |
169 | * @digest_size: length of digest for this request | |
170 | * @context_size: length of hw-context for this request. | |
171 | * Always digest_size + 4 | |
172 | * @buf_cnt: number of bytes saved in buf | |
173 | * @sg_in_idx: number of hw links | |
174 | * @in_sg: scatterlist for input data | |
175 | * @in_sg_chain: scatterlists for chained input data | |
176 | * @in_sg_chained: specifies if chained scatterlists are used or not | |
177 | * @total: total number of bytes for transfer | |
178 | * @last: is this the last block | |
179 | * @first: is this the first block | |
180 | * @active: inside a transfer | |
181 | */ | |
182 | struct sahara_sha_reqctx { | |
183 | u8 buf[SAHARA_MAX_SHA_BLOCK_SIZE]; | |
184 | u8 rembuf[SAHARA_MAX_SHA_BLOCK_SIZE]; | |
185 | u8 context[SHA256_DIGEST_SIZE + 4]; | |
186 | struct mutex mutex; | |
187 | unsigned int mode; | |
188 | unsigned int digest_size; | |
189 | unsigned int context_size; | |
190 | unsigned int buf_cnt; | |
191 | unsigned int sg_in_idx; | |
192 | struct scatterlist *in_sg; | |
193 | struct scatterlist in_sg_chain[2]; | |
194 | bool in_sg_chained; | |
195 | size_t total; | |
196 | unsigned int last; | |
197 | unsigned int first; | |
198 | unsigned int active; | |
199 | }; | |
200 | ||
5de88752 JM |
201 | struct sahara_dev { |
202 | struct device *device; | |
5ed903b3 | 203 | unsigned int version; |
5de88752 JM |
204 | void __iomem *regs_base; |
205 | struct clk *clk_ipg; | |
206 | struct clk *clk_ahb; | |
c0c3c89a ST |
207 | struct mutex queue_mutex; |
208 | struct task_struct *kthread; | |
209 | struct completion dma_completion; | |
5de88752 JM |
210 | |
211 | struct sahara_ctx *ctx; | |
212 | spinlock_t lock; | |
213 | struct crypto_queue queue; | |
214 | unsigned long flags; | |
215 | ||
5de88752 JM |
216 | struct sahara_hw_desc *hw_desc[SAHARA_MAX_HW_DESC]; |
217 | dma_addr_t hw_phys_desc[SAHARA_MAX_HW_DESC]; | |
218 | ||
219 | u8 *key_base; | |
220 | dma_addr_t key_phys_base; | |
221 | ||
222 | u8 *iv_base; | |
223 | dma_addr_t iv_phys_base; | |
224 | ||
5a2bb93f ST |
225 | u8 *context_base; |
226 | dma_addr_t context_phys_base; | |
227 | ||
5de88752 JM |
228 | struct sahara_hw_link *hw_link[SAHARA_MAX_HW_LINK]; |
229 | dma_addr_t hw_phys_link[SAHARA_MAX_HW_LINK]; | |
230 | ||
5de88752 JM |
231 | size_t total; |
232 | struct scatterlist *in_sg; | |
233 | unsigned int nb_in_sg; | |
234 | struct scatterlist *out_sg; | |
235 | unsigned int nb_out_sg; | |
236 | ||
237 | u32 error; | |
5de88752 JM |
238 | }; |
239 | ||
240 | static struct sahara_dev *dev_ptr; | |
241 | ||
242 | static inline void sahara_write(struct sahara_dev *dev, u32 data, u32 reg) | |
243 | { | |
244 | writel(data, dev->regs_base + reg); | |
245 | } | |
246 | ||
247 | static inline unsigned int sahara_read(struct sahara_dev *dev, u32 reg) | |
248 | { | |
249 | return readl(dev->regs_base + reg); | |
250 | } | |
251 | ||
252 | static u32 sahara_aes_key_hdr(struct sahara_dev *dev) | |
253 | { | |
254 | u32 hdr = SAHARA_HDR_BASE | SAHARA_HDR_SKHA_ALG_AES | | |
255 | SAHARA_HDR_FORM_KEY | SAHARA_HDR_LLO | | |
256 | SAHARA_HDR_CHA_SKHA | SAHARA_HDR_PARITY_BIT; | |
257 | ||
258 | if (dev->flags & FLAGS_CBC) { | |
259 | hdr |= SAHARA_HDR_SKHA_MODE_CBC; | |
260 | hdr ^= SAHARA_HDR_PARITY_BIT; | |
261 | } | |
262 | ||
263 | if (dev->flags & FLAGS_ENCRYPT) { | |
264 | hdr |= SAHARA_HDR_SKHA_OP_ENC; | |
265 | hdr ^= SAHARA_HDR_PARITY_BIT; | |
266 | } | |
267 | ||
268 | return hdr; | |
269 | } | |
270 | ||
271 | static u32 sahara_aes_data_link_hdr(struct sahara_dev *dev) | |
272 | { | |
273 | return SAHARA_HDR_BASE | SAHARA_HDR_FORM_DATA | | |
274 | SAHARA_HDR_CHA_SKHA | SAHARA_HDR_PARITY_BIT; | |
275 | } | |
276 | ||
277 | static int sahara_sg_length(struct scatterlist *sg, | |
278 | unsigned int total) | |
279 | { | |
280 | int sg_nb; | |
281 | unsigned int len; | |
282 | struct scatterlist *sg_list; | |
283 | ||
284 | sg_nb = 0; | |
285 | sg_list = sg; | |
286 | ||
287 | while (total) { | |
288 | len = min(sg_list->length, total); | |
289 | ||
290 | sg_nb++; | |
291 | total -= len; | |
292 | ||
293 | sg_list = sg_next(sg_list); | |
294 | if (!sg_list) | |
295 | total = 0; | |
296 | } | |
297 | ||
298 | return sg_nb; | |
299 | } | |
300 | ||
301 | static char *sahara_err_src[16] = { | |
302 | "No error", | |
303 | "Header error", | |
304 | "Descriptor length error", | |
305 | "Descriptor length or pointer error", | |
306 | "Link length error", | |
307 | "Link pointer error", | |
308 | "Input buffer error", | |
309 | "Output buffer error", | |
310 | "Output buffer starvation", | |
311 | "Internal state fault", | |
312 | "General descriptor problem", | |
313 | "Reserved", | |
314 | "Descriptor address error", | |
315 | "Link address error", | |
316 | "CHA error", | |
317 | "DMA error" | |
318 | }; | |
319 | ||
320 | static char *sahara_err_dmasize[4] = { | |
321 | "Byte transfer", | |
322 | "Half-word transfer", | |
323 | "Word transfer", | |
324 | "Reserved" | |
325 | }; | |
326 | ||
327 | static char *sahara_err_dmasrc[8] = { | |
328 | "No error", | |
329 | "AHB bus error", | |
330 | "Internal IP bus error", | |
331 | "Parity error", | |
332 | "DMA crosses 256 byte boundary", | |
333 | "DMA is busy", | |
334 | "Reserved", | |
335 | "DMA HW error" | |
336 | }; | |
337 | ||
338 | static char *sahara_cha_errsrc[12] = { | |
339 | "Input buffer non-empty", | |
340 | "Illegal address", | |
341 | "Illegal mode", | |
342 | "Illegal data size", | |
343 | "Illegal key size", | |
344 | "Write during processing", | |
345 | "CTX read during processing", | |
346 | "HW error", | |
347 | "Input buffer disabled/underflow", | |
348 | "Output buffer disabled/overflow", | |
349 | "DES key parity error", | |
350 | "Reserved" | |
351 | }; | |
352 | ||
353 | static char *sahara_cha_err[4] = { "No error", "SKHA", "MDHA", "RNG" }; | |
354 | ||
355 | static void sahara_decode_error(struct sahara_dev *dev, unsigned int error) | |
356 | { | |
357 | u8 source = SAHARA_ERRSTATUS_GET_SOURCE(error); | |
358 | u16 chasrc = ffs(SAHARA_ERRSTATUS_GET_CHASRC(error)); | |
359 | ||
360 | dev_err(dev->device, "%s: Error Register = 0x%08x\n", __func__, error); | |
361 | ||
362 | dev_err(dev->device, " - %s.\n", sahara_err_src[source]); | |
363 | ||
364 | if (source == SAHARA_ERRSOURCE_DMA) { | |
365 | if (error & SAHARA_ERRSTATUS_DMA_DIR) | |
366 | dev_err(dev->device, " * DMA read.\n"); | |
367 | else | |
368 | dev_err(dev->device, " * DMA write.\n"); | |
369 | ||
370 | dev_err(dev->device, " * %s.\n", | |
371 | sahara_err_dmasize[SAHARA_ERRSTATUS_GET_DMASZ(error)]); | |
372 | dev_err(dev->device, " * %s.\n", | |
373 | sahara_err_dmasrc[SAHARA_ERRSTATUS_GET_DMASRC(error)]); | |
374 | } else if (source == SAHARA_ERRSOURCE_CHA) { | |
375 | dev_err(dev->device, " * %s.\n", | |
376 | sahara_cha_errsrc[chasrc]); | |
377 | dev_err(dev->device, " * %s.\n", | |
378 | sahara_cha_err[SAHARA_ERRSTATUS_GET_CHAERR(error)]); | |
379 | } | |
380 | dev_err(dev->device, "\n"); | |
381 | } | |
382 | ||
383 | static char *sahara_state[4] = { "Idle", "Busy", "Error", "HW Fault" }; | |
384 | ||
385 | static void sahara_decode_status(struct sahara_dev *dev, unsigned int status) | |
386 | { | |
387 | u8 state; | |
388 | ||
389 | if (!IS_ENABLED(DEBUG)) | |
390 | return; | |
391 | ||
392 | state = SAHARA_STATUS_GET_STATE(status); | |
393 | ||
394 | dev_dbg(dev->device, "%s: Status Register = 0x%08x\n", | |
395 | __func__, status); | |
396 | ||
397 | dev_dbg(dev->device, " - State = %d:\n", state); | |
398 | if (state & SAHARA_STATE_COMP_FLAG) | |
399 | dev_dbg(dev->device, " * Descriptor completed. IRQ pending.\n"); | |
400 | ||
401 | dev_dbg(dev->device, " * %s.\n", | |
402 | sahara_state[state & ~SAHARA_STATE_COMP_FLAG]); | |
403 | ||
404 | if (status & SAHARA_STATUS_DAR_FULL) | |
405 | dev_dbg(dev->device, " - DAR Full.\n"); | |
406 | if (status & SAHARA_STATUS_ERROR) | |
407 | dev_dbg(dev->device, " - Error.\n"); | |
408 | if (status & SAHARA_STATUS_SECURE) | |
409 | dev_dbg(dev->device, " - Secure.\n"); | |
410 | if (status & SAHARA_STATUS_FAIL) | |
411 | dev_dbg(dev->device, " - Fail.\n"); | |
412 | if (status & SAHARA_STATUS_RNG_RESEED) | |
413 | dev_dbg(dev->device, " - RNG Reseed Request.\n"); | |
414 | if (status & SAHARA_STATUS_ACTIVE_RNG) | |
415 | dev_dbg(dev->device, " - RNG Active.\n"); | |
416 | if (status & SAHARA_STATUS_ACTIVE_MDHA) | |
417 | dev_dbg(dev->device, " - MDHA Active.\n"); | |
418 | if (status & SAHARA_STATUS_ACTIVE_SKHA) | |
419 | dev_dbg(dev->device, " - SKHA Active.\n"); | |
420 | ||
421 | if (status & SAHARA_STATUS_MODE_BATCH) | |
422 | dev_dbg(dev->device, " - Batch Mode.\n"); | |
423 | else if (status & SAHARA_STATUS_MODE_DEDICATED) | |
424 | dev_dbg(dev->device, " - Decidated Mode.\n"); | |
425 | else if (status & SAHARA_STATUS_MODE_DEBUG) | |
426 | dev_dbg(dev->device, " - Debug Mode.\n"); | |
427 | ||
428 | dev_dbg(dev->device, " - Internal state = 0x%02x\n", | |
429 | SAHARA_STATUS_GET_ISTATE(status)); | |
430 | ||
431 | dev_dbg(dev->device, "Current DAR: 0x%08x\n", | |
432 | sahara_read(dev, SAHARA_REG_CDAR)); | |
433 | dev_dbg(dev->device, "Initial DAR: 0x%08x\n\n", | |
434 | sahara_read(dev, SAHARA_REG_IDAR)); | |
435 | } | |
436 | ||
437 | static void sahara_dump_descriptors(struct sahara_dev *dev) | |
438 | { | |
439 | int i; | |
440 | ||
441 | if (!IS_ENABLED(DEBUG)) | |
442 | return; | |
443 | ||
444 | for (i = 0; i < SAHARA_MAX_HW_DESC; i++) { | |
445 | dev_dbg(dev->device, "Descriptor (%d) (0x%08x):\n", | |
446 | i, dev->hw_phys_desc[i]); | |
447 | dev_dbg(dev->device, "\thdr = 0x%08x\n", dev->hw_desc[i]->hdr); | |
448 | dev_dbg(dev->device, "\tlen1 = %u\n", dev->hw_desc[i]->len1); | |
449 | dev_dbg(dev->device, "\tp1 = 0x%08x\n", dev->hw_desc[i]->p1); | |
450 | dev_dbg(dev->device, "\tlen2 = %u\n", dev->hw_desc[i]->len2); | |
451 | dev_dbg(dev->device, "\tp2 = 0x%08x\n", dev->hw_desc[i]->p2); | |
452 | dev_dbg(dev->device, "\tnext = 0x%08x\n", | |
453 | dev->hw_desc[i]->next); | |
454 | } | |
455 | dev_dbg(dev->device, "\n"); | |
456 | } | |
457 | ||
458 | static void sahara_dump_links(struct sahara_dev *dev) | |
459 | { | |
460 | int i; | |
461 | ||
462 | if (!IS_ENABLED(DEBUG)) | |
463 | return; | |
464 | ||
465 | for (i = 0; i < SAHARA_MAX_HW_LINK; i++) { | |
466 | dev_dbg(dev->device, "Link (%d) (0x%08x):\n", | |
467 | i, dev->hw_phys_link[i]); | |
468 | dev_dbg(dev->device, "\tlen = %u\n", dev->hw_link[i]->len); | |
469 | dev_dbg(dev->device, "\tp = 0x%08x\n", dev->hw_link[i]->p); | |
470 | dev_dbg(dev->device, "\tnext = 0x%08x\n", | |
471 | dev->hw_link[i]->next); | |
472 | } | |
473 | dev_dbg(dev->device, "\n"); | |
474 | } | |
475 | ||
5de88752 JM |
476 | static int sahara_hw_descriptor_create(struct sahara_dev *dev) |
477 | { | |
478 | struct sahara_ctx *ctx = dev->ctx; | |
479 | struct scatterlist *sg; | |
480 | int ret; | |
481 | int i, j; | |
482 | ||
483 | /* Copy new key if necessary */ | |
484 | if (ctx->flags & FLAGS_NEW_KEY) { | |
485 | memcpy(dev->key_base, ctx->key, ctx->keylen); | |
486 | ctx->flags &= ~FLAGS_NEW_KEY; | |
487 | ||
488 | if (dev->flags & FLAGS_CBC) { | |
489 | dev->hw_desc[0]->len1 = AES_BLOCK_SIZE; | |
490 | dev->hw_desc[0]->p1 = dev->iv_phys_base; | |
491 | } else { | |
492 | dev->hw_desc[0]->len1 = 0; | |
493 | dev->hw_desc[0]->p1 = 0; | |
494 | } | |
495 | dev->hw_desc[0]->len2 = ctx->keylen; | |
496 | dev->hw_desc[0]->p2 = dev->key_phys_base; | |
497 | dev->hw_desc[0]->next = dev->hw_phys_desc[1]; | |
498 | } | |
499 | dev->hw_desc[0]->hdr = sahara_aes_key_hdr(dev); | |
500 | ||
501 | dev->nb_in_sg = sahara_sg_length(dev->in_sg, dev->total); | |
502 | dev->nb_out_sg = sahara_sg_length(dev->out_sg, dev->total); | |
503 | if ((dev->nb_in_sg + dev->nb_out_sg) > SAHARA_MAX_HW_LINK) { | |
504 | dev_err(dev->device, "not enough hw links (%d)\n", | |
505 | dev->nb_in_sg + dev->nb_out_sg); | |
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | ret = dma_map_sg(dev->device, dev->in_sg, dev->nb_in_sg, | |
510 | DMA_TO_DEVICE); | |
511 | if (ret != dev->nb_in_sg) { | |
512 | dev_err(dev->device, "couldn't map in sg\n"); | |
513 | goto unmap_in; | |
514 | } | |
515 | ret = dma_map_sg(dev->device, dev->out_sg, dev->nb_out_sg, | |
516 | DMA_FROM_DEVICE); | |
517 | if (ret != dev->nb_out_sg) { | |
518 | dev_err(dev->device, "couldn't map out sg\n"); | |
519 | goto unmap_out; | |
520 | } | |
521 | ||
522 | /* Create input links */ | |
523 | dev->hw_desc[1]->p1 = dev->hw_phys_link[0]; | |
524 | sg = dev->in_sg; | |
525 | for (i = 0; i < dev->nb_in_sg; i++) { | |
526 | dev->hw_link[i]->len = sg->length; | |
527 | dev->hw_link[i]->p = sg->dma_address; | |
528 | if (i == (dev->nb_in_sg - 1)) { | |
529 | dev->hw_link[i]->next = 0; | |
530 | } else { | |
531 | dev->hw_link[i]->next = dev->hw_phys_link[i + 1]; | |
532 | sg = sg_next(sg); | |
533 | } | |
534 | } | |
535 | ||
536 | /* Create output links */ | |
537 | dev->hw_desc[1]->p2 = dev->hw_phys_link[i]; | |
538 | sg = dev->out_sg; | |
539 | for (j = i; j < dev->nb_out_sg + i; j++) { | |
540 | dev->hw_link[j]->len = sg->length; | |
541 | dev->hw_link[j]->p = sg->dma_address; | |
542 | if (j == (dev->nb_out_sg + i - 1)) { | |
543 | dev->hw_link[j]->next = 0; | |
544 | } else { | |
545 | dev->hw_link[j]->next = dev->hw_phys_link[j + 1]; | |
546 | sg = sg_next(sg); | |
547 | } | |
548 | } | |
549 | ||
550 | /* Fill remaining fields of hw_desc[1] */ | |
551 | dev->hw_desc[1]->hdr = sahara_aes_data_link_hdr(dev); | |
552 | dev->hw_desc[1]->len1 = dev->total; | |
553 | dev->hw_desc[1]->len2 = dev->total; | |
554 | dev->hw_desc[1]->next = 0; | |
555 | ||
556 | sahara_dump_descriptors(dev); | |
557 | sahara_dump_links(dev); | |
558 | ||
5de88752 JM |
559 | sahara_write(dev, dev->hw_phys_desc[0], SAHARA_REG_DAR); |
560 | ||
561 | return 0; | |
562 | ||
563 | unmap_out: | |
564 | dma_unmap_sg(dev->device, dev->out_sg, dev->nb_out_sg, | |
565 | DMA_TO_DEVICE); | |
566 | unmap_in: | |
567 | dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg, | |
568 | DMA_FROM_DEVICE); | |
569 | ||
570 | return -EINVAL; | |
571 | } | |
572 | ||
c0c3c89a | 573 | static int sahara_aes_process(struct ablkcipher_request *req) |
5de88752 | 574 | { |
c0c3c89a | 575 | struct sahara_dev *dev = dev_ptr; |
5de88752 JM |
576 | struct sahara_ctx *ctx; |
577 | struct sahara_aes_reqctx *rctx; | |
5de88752 JM |
578 | int ret; |
579 | ||
5de88752 JM |
580 | /* Request is ready to be dispatched by the device */ |
581 | dev_dbg(dev->device, | |
582 | "dispatch request (nbytes=%d, src=%p, dst=%p)\n", | |
583 | req->nbytes, req->src, req->dst); | |
584 | ||
585 | /* assign new request to device */ | |
5de88752 JM |
586 | dev->total = req->nbytes; |
587 | dev->in_sg = req->src; | |
588 | dev->out_sg = req->dst; | |
589 | ||
590 | rctx = ablkcipher_request_ctx(req); | |
591 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
592 | rctx->mode &= FLAGS_MODE_MASK; | |
593 | dev->flags = (dev->flags & ~FLAGS_MODE_MASK) | rctx->mode; | |
594 | ||
595 | if ((dev->flags & FLAGS_CBC) && req->info) | |
596 | memcpy(dev->iv_base, req->info, AES_KEYSIZE_128); | |
597 | ||
598 | /* assign new context to device */ | |
5de88752 JM |
599 | dev->ctx = ctx; |
600 | ||
c0c3c89a ST |
601 | reinit_completion(&dev->dma_completion); |
602 | ||
5de88752 | 603 | ret = sahara_hw_descriptor_create(dev); |
c0c3c89a ST |
604 | |
605 | ret = wait_for_completion_timeout(&dev->dma_completion, | |
606 | msecs_to_jiffies(SAHARA_TIMEOUT_MS)); | |
607 | if (!ret) { | |
608 | dev_err(dev->device, "AES timeout\n"); | |
609 | return -ETIMEDOUT; | |
5de88752 | 610 | } |
c0c3c89a ST |
611 | |
612 | dma_unmap_sg(dev->device, dev->out_sg, dev->nb_out_sg, | |
613 | DMA_TO_DEVICE); | |
614 | dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg, | |
615 | DMA_FROM_DEVICE); | |
616 | ||
617 | return 0; | |
5de88752 JM |
618 | } |
619 | ||
620 | static int sahara_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
621 | unsigned int keylen) | |
622 | { | |
623 | struct sahara_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
624 | int ret; | |
625 | ||
626 | ctx->keylen = keylen; | |
627 | ||
628 | /* SAHARA only supports 128bit keys */ | |
629 | if (keylen == AES_KEYSIZE_128) { | |
630 | memcpy(ctx->key, key, keylen); | |
631 | ctx->flags |= FLAGS_NEW_KEY; | |
632 | return 0; | |
633 | } | |
634 | ||
635 | if (keylen != AES_KEYSIZE_128 && | |
636 | keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_256) | |
637 | return -EINVAL; | |
638 | ||
639 | /* | |
640 | * The requested key size is not supported by HW, do a fallback. | |
641 | */ | |
642 | ctx->fallback->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; | |
643 | ctx->fallback->base.crt_flags |= | |
644 | (tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK); | |
645 | ||
646 | ret = crypto_ablkcipher_setkey(ctx->fallback, key, keylen); | |
647 | if (ret) { | |
648 | struct crypto_tfm *tfm_aux = crypto_ablkcipher_tfm(tfm); | |
649 | ||
650 | tfm_aux->crt_flags &= ~CRYPTO_TFM_RES_MASK; | |
651 | tfm_aux->crt_flags |= | |
652 | (ctx->fallback->base.crt_flags & CRYPTO_TFM_RES_MASK); | |
653 | } | |
654 | return ret; | |
655 | } | |
656 | ||
657 | static int sahara_aes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
658 | { | |
5de88752 JM |
659 | struct sahara_aes_reqctx *rctx = ablkcipher_request_ctx(req); |
660 | struct sahara_dev *dev = dev_ptr; | |
661 | int err = 0; | |
5de88752 JM |
662 | |
663 | dev_dbg(dev->device, "nbytes: %d, enc: %d, cbc: %d\n", | |
664 | req->nbytes, !!(mode & FLAGS_ENCRYPT), !!(mode & FLAGS_CBC)); | |
665 | ||
666 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { | |
667 | dev_err(dev->device, | |
668 | "request size is not exact amount of AES blocks\n"); | |
669 | return -EINVAL; | |
670 | } | |
671 | ||
5de88752 | 672 | rctx->mode = mode; |
c0c3c89a ST |
673 | |
674 | mutex_lock(&dev->queue_mutex); | |
5de88752 | 675 | err = ablkcipher_enqueue_request(&dev->queue, req); |
c0c3c89a | 676 | mutex_unlock(&dev->queue_mutex); |
5de88752 | 677 | |
c0c3c89a | 678 | wake_up_process(dev->kthread); |
5de88752 JM |
679 | |
680 | return err; | |
681 | } | |
682 | ||
683 | static int sahara_aes_ecb_encrypt(struct ablkcipher_request *req) | |
684 | { | |
685 | struct crypto_tfm *tfm = | |
686 | crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req)); | |
687 | struct sahara_ctx *ctx = crypto_ablkcipher_ctx( | |
688 | crypto_ablkcipher_reqtfm(req)); | |
689 | int err; | |
690 | ||
691 | if (unlikely(ctx->keylen != AES_KEYSIZE_128)) { | |
692 | ablkcipher_request_set_tfm(req, ctx->fallback); | |
693 | err = crypto_ablkcipher_encrypt(req); | |
694 | ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm)); | |
695 | return err; | |
696 | } | |
697 | ||
698 | return sahara_aes_crypt(req, FLAGS_ENCRYPT); | |
699 | } | |
700 | ||
701 | static int sahara_aes_ecb_decrypt(struct ablkcipher_request *req) | |
702 | { | |
703 | struct crypto_tfm *tfm = | |
704 | crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req)); | |
705 | struct sahara_ctx *ctx = crypto_ablkcipher_ctx( | |
706 | crypto_ablkcipher_reqtfm(req)); | |
707 | int err; | |
708 | ||
709 | if (unlikely(ctx->keylen != AES_KEYSIZE_128)) { | |
710 | ablkcipher_request_set_tfm(req, ctx->fallback); | |
711 | err = crypto_ablkcipher_decrypt(req); | |
712 | ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm)); | |
713 | return err; | |
714 | } | |
715 | ||
716 | return sahara_aes_crypt(req, 0); | |
717 | } | |
718 | ||
719 | static int sahara_aes_cbc_encrypt(struct ablkcipher_request *req) | |
720 | { | |
721 | struct crypto_tfm *tfm = | |
722 | crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req)); | |
723 | struct sahara_ctx *ctx = crypto_ablkcipher_ctx( | |
724 | crypto_ablkcipher_reqtfm(req)); | |
725 | int err; | |
726 | ||
727 | if (unlikely(ctx->keylen != AES_KEYSIZE_128)) { | |
728 | ablkcipher_request_set_tfm(req, ctx->fallback); | |
729 | err = crypto_ablkcipher_encrypt(req); | |
730 | ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm)); | |
731 | return err; | |
732 | } | |
733 | ||
734 | return sahara_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC); | |
735 | } | |
736 | ||
737 | static int sahara_aes_cbc_decrypt(struct ablkcipher_request *req) | |
738 | { | |
739 | struct crypto_tfm *tfm = | |
740 | crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req)); | |
741 | struct sahara_ctx *ctx = crypto_ablkcipher_ctx( | |
742 | crypto_ablkcipher_reqtfm(req)); | |
743 | int err; | |
744 | ||
745 | if (unlikely(ctx->keylen != AES_KEYSIZE_128)) { | |
746 | ablkcipher_request_set_tfm(req, ctx->fallback); | |
747 | err = crypto_ablkcipher_decrypt(req); | |
748 | ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm)); | |
749 | return err; | |
750 | } | |
751 | ||
752 | return sahara_aes_crypt(req, FLAGS_CBC); | |
753 | } | |
754 | ||
755 | static int sahara_aes_cra_init(struct crypto_tfm *tfm) | |
756 | { | |
efa59e2e | 757 | const char *name = crypto_tfm_alg_name(tfm); |
5de88752 JM |
758 | struct sahara_ctx *ctx = crypto_tfm_ctx(tfm); |
759 | ||
760 | ctx->fallback = crypto_alloc_ablkcipher(name, 0, | |
761 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); | |
762 | if (IS_ERR(ctx->fallback)) { | |
763 | pr_err("Error allocating fallback algo %s\n", name); | |
764 | return PTR_ERR(ctx->fallback); | |
765 | } | |
766 | ||
767 | tfm->crt_ablkcipher.reqsize = sizeof(struct sahara_aes_reqctx); | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | static void sahara_aes_cra_exit(struct crypto_tfm *tfm) | |
773 | { | |
774 | struct sahara_ctx *ctx = crypto_tfm_ctx(tfm); | |
775 | ||
776 | if (ctx->fallback) | |
777 | crypto_free_ablkcipher(ctx->fallback); | |
778 | ctx->fallback = NULL; | |
779 | } | |
780 | ||
5a2bb93f ST |
781 | static u32 sahara_sha_init_hdr(struct sahara_dev *dev, |
782 | struct sahara_sha_reqctx *rctx) | |
783 | { | |
784 | u32 hdr = 0; | |
785 | ||
786 | hdr = rctx->mode; | |
787 | ||
788 | if (rctx->first) { | |
789 | hdr |= SAHARA_HDR_MDHA_SET_MODE_HASH; | |
790 | hdr |= SAHARA_HDR_MDHA_INIT; | |
791 | } else { | |
792 | hdr |= SAHARA_HDR_MDHA_SET_MODE_MD_KEY; | |
793 | } | |
794 | ||
795 | if (rctx->last) | |
796 | hdr |= SAHARA_HDR_MDHA_PDATA; | |
797 | ||
798 | if (hweight_long(hdr) % 2 == 0) | |
799 | hdr |= SAHARA_HDR_PARITY_BIT; | |
800 | ||
801 | return hdr; | |
802 | } | |
803 | ||
804 | static int sahara_sha_hw_links_create(struct sahara_dev *dev, | |
805 | struct sahara_sha_reqctx *rctx, | |
806 | int start) | |
807 | { | |
808 | struct scatterlist *sg; | |
809 | unsigned int i; | |
810 | int ret; | |
811 | ||
812 | dev->in_sg = rctx->in_sg; | |
813 | ||
814 | dev->nb_in_sg = sahara_sg_length(dev->in_sg, rctx->total); | |
815 | if ((dev->nb_in_sg) > SAHARA_MAX_HW_LINK) { | |
816 | dev_err(dev->device, "not enough hw links (%d)\n", | |
817 | dev->nb_in_sg + dev->nb_out_sg); | |
818 | return -EINVAL; | |
819 | } | |
820 | ||
821 | if (rctx->in_sg_chained) { | |
822 | i = start; | |
823 | sg = dev->in_sg; | |
824 | while (sg) { | |
825 | ret = dma_map_sg(dev->device, sg, 1, | |
826 | DMA_TO_DEVICE); | |
827 | if (!ret) | |
828 | return -EFAULT; | |
829 | ||
830 | dev->hw_link[i]->len = sg->length; | |
831 | dev->hw_link[i]->p = sg->dma_address; | |
832 | dev->hw_link[i]->next = dev->hw_phys_link[i + 1]; | |
833 | sg = sg_next(sg); | |
834 | i += 1; | |
835 | } | |
836 | dev->hw_link[i-1]->next = 0; | |
837 | } else { | |
838 | sg = dev->in_sg; | |
839 | ret = dma_map_sg(dev->device, dev->in_sg, dev->nb_in_sg, | |
840 | DMA_TO_DEVICE); | |
841 | if (!ret) | |
842 | return -EFAULT; | |
843 | ||
844 | for (i = start; i < dev->nb_in_sg + start; i++) { | |
845 | dev->hw_link[i]->len = sg->length; | |
846 | dev->hw_link[i]->p = sg->dma_address; | |
847 | if (i == (dev->nb_in_sg + start - 1)) { | |
848 | dev->hw_link[i]->next = 0; | |
849 | } else { | |
850 | dev->hw_link[i]->next = dev->hw_phys_link[i + 1]; | |
851 | sg = sg_next(sg); | |
852 | } | |
853 | } | |
854 | } | |
855 | ||
856 | return i; | |
857 | } | |
858 | ||
859 | static int sahara_sha_hw_data_descriptor_create(struct sahara_dev *dev, | |
860 | struct sahara_sha_reqctx *rctx, | |
861 | struct ahash_request *req, | |
862 | int index) | |
863 | { | |
864 | unsigned result_len; | |
865 | int i = index; | |
866 | ||
867 | if (rctx->first) | |
868 | /* Create initial descriptor: #8*/ | |
869 | dev->hw_desc[index]->hdr = sahara_sha_init_hdr(dev, rctx); | |
870 | else | |
871 | /* Create hash descriptor: #10. Must follow #6. */ | |
872 | dev->hw_desc[index]->hdr = SAHARA_HDR_MDHA_HASH; | |
873 | ||
874 | dev->hw_desc[index]->len1 = rctx->total; | |
875 | if (dev->hw_desc[index]->len1 == 0) { | |
876 | /* if len1 is 0, p1 must be 0, too */ | |
877 | dev->hw_desc[index]->p1 = 0; | |
878 | rctx->sg_in_idx = 0; | |
879 | } else { | |
880 | /* Create input links */ | |
881 | dev->hw_desc[index]->p1 = dev->hw_phys_link[index]; | |
882 | i = sahara_sha_hw_links_create(dev, rctx, index); | |
883 | ||
884 | rctx->sg_in_idx = index; | |
885 | if (i < 0) | |
886 | return i; | |
887 | } | |
888 | ||
889 | dev->hw_desc[index]->p2 = dev->hw_phys_link[i]; | |
890 | ||
891 | /* Save the context for the next operation */ | |
892 | result_len = rctx->context_size; | |
893 | dev->hw_link[i]->p = dev->context_phys_base; | |
894 | ||
895 | dev->hw_link[i]->len = result_len; | |
896 | dev->hw_desc[index]->len2 = result_len; | |
897 | ||
898 | dev->hw_link[i]->next = 0; | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | /* | |
904 | * Load descriptor aka #6 | |
905 | * | |
906 | * To load a previously saved context back to the MDHA unit | |
907 | * | |
908 | * p1: Saved Context | |
909 | * p2: NULL | |
910 | * | |
911 | */ | |
912 | static int sahara_sha_hw_context_descriptor_create(struct sahara_dev *dev, | |
913 | struct sahara_sha_reqctx *rctx, | |
914 | struct ahash_request *req, | |
915 | int index) | |
916 | { | |
917 | dev->hw_desc[index]->hdr = sahara_sha_init_hdr(dev, rctx); | |
918 | ||
919 | dev->hw_desc[index]->len1 = rctx->context_size; | |
920 | dev->hw_desc[index]->p1 = dev->hw_phys_link[index]; | |
921 | dev->hw_desc[index]->len2 = 0; | |
922 | dev->hw_desc[index]->p2 = 0; | |
923 | ||
924 | dev->hw_link[index]->len = rctx->context_size; | |
925 | dev->hw_link[index]->p = dev->context_phys_base; | |
926 | dev->hw_link[index]->next = 0; | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | static int sahara_walk_and_recalc(struct scatterlist *sg, unsigned int nbytes) | |
932 | { | |
933 | if (!sg || !sg->length) | |
934 | return nbytes; | |
935 | ||
936 | while (nbytes && sg) { | |
937 | if (nbytes <= sg->length) { | |
938 | sg->length = nbytes; | |
939 | sg_mark_end(sg); | |
940 | break; | |
941 | } | |
942 | nbytes -= sg->length; | |
5be4d4c9 | 943 | sg = sg_next(sg); |
5a2bb93f ST |
944 | } |
945 | ||
946 | return nbytes; | |
947 | } | |
948 | ||
949 | static int sahara_sha_prepare_request(struct ahash_request *req) | |
950 | { | |
951 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
952 | struct sahara_sha_reqctx *rctx = ahash_request_ctx(req); | |
953 | unsigned int hash_later; | |
954 | unsigned int block_size; | |
955 | unsigned int len; | |
956 | ||
957 | block_size = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm)); | |
958 | ||
959 | /* append bytes from previous operation */ | |
960 | len = rctx->buf_cnt + req->nbytes; | |
961 | ||
962 | /* only the last transfer can be padded in hardware */ | |
963 | if (!rctx->last && (len < block_size)) { | |
964 | /* to few data, save for next operation */ | |
965 | scatterwalk_map_and_copy(rctx->buf + rctx->buf_cnt, req->src, | |
966 | 0, req->nbytes, 0); | |
967 | rctx->buf_cnt += req->nbytes; | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
972 | /* add data from previous operation first */ | |
973 | if (rctx->buf_cnt) | |
974 | memcpy(rctx->rembuf, rctx->buf, rctx->buf_cnt); | |
975 | ||
976 | /* data must always be a multiple of block_size */ | |
977 | hash_later = rctx->last ? 0 : len & (block_size - 1); | |
978 | if (hash_later) { | |
979 | unsigned int offset = req->nbytes - hash_later; | |
980 | /* Save remaining bytes for later use */ | |
981 | scatterwalk_map_and_copy(rctx->buf, req->src, offset, | |
982 | hash_later, 0); | |
983 | } | |
984 | ||
985 | /* nbytes should now be multiple of blocksize */ | |
986 | req->nbytes = req->nbytes - hash_later; | |
987 | ||
988 | sahara_walk_and_recalc(req->src, req->nbytes); | |
989 | ||
990 | /* have data from previous operation and current */ | |
991 | if (rctx->buf_cnt && req->nbytes) { | |
992 | sg_init_table(rctx->in_sg_chain, 2); | |
993 | sg_set_buf(rctx->in_sg_chain, rctx->rembuf, rctx->buf_cnt); | |
994 | ||
995 | scatterwalk_sg_chain(rctx->in_sg_chain, 2, req->src); | |
996 | ||
997 | rctx->total = req->nbytes + rctx->buf_cnt; | |
998 | rctx->in_sg = rctx->in_sg_chain; | |
999 | ||
1000 | rctx->in_sg_chained = true; | |
1001 | req->src = rctx->in_sg_chain; | |
1002 | /* only data from previous operation */ | |
1003 | } else if (rctx->buf_cnt) { | |
1004 | if (req->src) | |
1005 | rctx->in_sg = req->src; | |
1006 | else | |
1007 | rctx->in_sg = rctx->in_sg_chain; | |
1008 | /* buf was copied into rembuf above */ | |
1009 | sg_init_one(rctx->in_sg, rctx->rembuf, rctx->buf_cnt); | |
1010 | rctx->total = rctx->buf_cnt; | |
1011 | rctx->in_sg_chained = false; | |
1012 | /* no data from previous operation */ | |
1013 | } else { | |
1014 | rctx->in_sg = req->src; | |
1015 | rctx->total = req->nbytes; | |
1016 | req->src = rctx->in_sg; | |
1017 | rctx->in_sg_chained = false; | |
1018 | } | |
1019 | ||
1020 | /* on next call, we only have the remaining data in the buffer */ | |
1021 | rctx->buf_cnt = hash_later; | |
1022 | ||
1023 | return -EINPROGRESS; | |
1024 | } | |
1025 | ||
1026 | static void sahara_sha_unmap_sg(struct sahara_dev *dev, | |
1027 | struct sahara_sha_reqctx *rctx) | |
1028 | { | |
1029 | struct scatterlist *sg; | |
1030 | ||
1031 | if (rctx->in_sg_chained) { | |
1032 | sg = dev->in_sg; | |
1033 | while (sg) { | |
1034 | dma_unmap_sg(dev->device, sg, 1, DMA_TO_DEVICE); | |
1035 | sg = sg_next(sg); | |
1036 | } | |
1037 | } else { | |
1038 | dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg, | |
1039 | DMA_TO_DEVICE); | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | static int sahara_sha_process(struct ahash_request *req) | |
1044 | { | |
1045 | struct sahara_dev *dev = dev_ptr; | |
1046 | struct sahara_sha_reqctx *rctx = ahash_request_ctx(req); | |
1047 | int ret = -EINPROGRESS; | |
1048 | ||
1049 | ret = sahara_sha_prepare_request(req); | |
1050 | if (!ret) | |
1051 | return ret; | |
1052 | ||
1053 | if (rctx->first) { | |
1054 | sahara_sha_hw_data_descriptor_create(dev, rctx, req, 0); | |
1055 | dev->hw_desc[0]->next = 0; | |
1056 | rctx->first = 0; | |
1057 | } else { | |
1058 | memcpy(dev->context_base, rctx->context, rctx->context_size); | |
1059 | ||
1060 | sahara_sha_hw_context_descriptor_create(dev, rctx, req, 0); | |
1061 | dev->hw_desc[0]->next = dev->hw_phys_desc[1]; | |
1062 | sahara_sha_hw_data_descriptor_create(dev, rctx, req, 1); | |
1063 | dev->hw_desc[1]->next = 0; | |
1064 | } | |
1065 | ||
1066 | sahara_dump_descriptors(dev); | |
1067 | sahara_dump_links(dev); | |
1068 | ||
1069 | reinit_completion(&dev->dma_completion); | |
1070 | ||
1071 | sahara_write(dev, dev->hw_phys_desc[0], SAHARA_REG_DAR); | |
1072 | ||
1073 | ret = wait_for_completion_timeout(&dev->dma_completion, | |
1074 | msecs_to_jiffies(SAHARA_TIMEOUT_MS)); | |
1075 | if (!ret) { | |
1076 | dev_err(dev->device, "SHA timeout\n"); | |
1077 | return -ETIMEDOUT; | |
1078 | } | |
1079 | ||
1080 | if (rctx->sg_in_idx) | |
1081 | sahara_sha_unmap_sg(dev, rctx); | |
1082 | ||
1083 | memcpy(rctx->context, dev->context_base, rctx->context_size); | |
1084 | ||
1085 | if (req->result) | |
1086 | memcpy(req->result, rctx->context, rctx->digest_size); | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | ||
c0c3c89a ST |
1091 | static int sahara_queue_manage(void *data) |
1092 | { | |
1093 | struct sahara_dev *dev = (struct sahara_dev *)data; | |
1094 | struct crypto_async_request *async_req; | |
1095 | int ret = 0; | |
1096 | ||
1097 | do { | |
1098 | __set_current_state(TASK_INTERRUPTIBLE); | |
1099 | ||
1100 | mutex_lock(&dev->queue_mutex); | |
1101 | async_req = crypto_dequeue_request(&dev->queue); | |
1102 | mutex_unlock(&dev->queue_mutex); | |
1103 | ||
1104 | if (async_req) { | |
5a2bb93f ST |
1105 | if (crypto_tfm_alg_type(async_req->tfm) == |
1106 | CRYPTO_ALG_TYPE_AHASH) { | |
1107 | struct ahash_request *req = | |
1108 | ahash_request_cast(async_req); | |
1109 | ||
1110 | ret = sahara_sha_process(req); | |
1111 | } else { | |
1112 | struct ablkcipher_request *req = | |
1113 | ablkcipher_request_cast(async_req); | |
c0c3c89a | 1114 | |
5a2bb93f ST |
1115 | ret = sahara_aes_process(req); |
1116 | } | |
c0c3c89a ST |
1117 | |
1118 | async_req->complete(async_req, ret); | |
1119 | ||
1120 | continue; | |
1121 | } | |
1122 | ||
1123 | schedule(); | |
1124 | } while (!kthread_should_stop()); | |
1125 | ||
1126 | return 0; | |
1127 | } | |
1128 | ||
5a2bb93f ST |
1129 | static int sahara_sha_enqueue(struct ahash_request *req, int last) |
1130 | { | |
1131 | struct sahara_sha_reqctx *rctx = ahash_request_ctx(req); | |
1132 | struct sahara_dev *dev = dev_ptr; | |
1133 | int ret; | |
1134 | ||
1135 | if (!req->nbytes && !last) | |
1136 | return 0; | |
1137 | ||
1138 | mutex_lock(&rctx->mutex); | |
1139 | rctx->last = last; | |
1140 | ||
1141 | if (!rctx->active) { | |
1142 | rctx->active = 1; | |
1143 | rctx->first = 1; | |
1144 | } | |
1145 | ||
1146 | mutex_lock(&dev->queue_mutex); | |
1147 | ret = crypto_enqueue_request(&dev->queue, &req->base); | |
1148 | mutex_unlock(&dev->queue_mutex); | |
1149 | ||
1150 | wake_up_process(dev->kthread); | |
1151 | mutex_unlock(&rctx->mutex); | |
1152 | ||
1153 | return ret; | |
1154 | } | |
1155 | ||
1156 | static int sahara_sha_init(struct ahash_request *req) | |
1157 | { | |
1158 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
1159 | struct sahara_sha_reqctx *rctx = ahash_request_ctx(req); | |
1160 | ||
1161 | memset(rctx, 0, sizeof(*rctx)); | |
1162 | ||
1163 | switch (crypto_ahash_digestsize(tfm)) { | |
1164 | case SHA1_DIGEST_SIZE: | |
1165 | rctx->mode |= SAHARA_HDR_MDHA_ALG_SHA1; | |
1166 | rctx->digest_size = SHA1_DIGEST_SIZE; | |
1167 | break; | |
1168 | case SHA256_DIGEST_SIZE: | |
1169 | rctx->mode |= SAHARA_HDR_MDHA_ALG_SHA256; | |
1170 | rctx->digest_size = SHA256_DIGEST_SIZE; | |
1171 | break; | |
1172 | default: | |
1173 | return -EINVAL; | |
1174 | } | |
1175 | ||
1176 | rctx->context_size = rctx->digest_size + 4; | |
1177 | rctx->active = 0; | |
1178 | ||
1179 | mutex_init(&rctx->mutex); | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static int sahara_sha_update(struct ahash_request *req) | |
1185 | { | |
1186 | return sahara_sha_enqueue(req, 0); | |
1187 | } | |
1188 | ||
1189 | static int sahara_sha_final(struct ahash_request *req) | |
1190 | { | |
1191 | req->nbytes = 0; | |
1192 | return sahara_sha_enqueue(req, 1); | |
1193 | } | |
1194 | ||
1195 | static int sahara_sha_finup(struct ahash_request *req) | |
1196 | { | |
1197 | return sahara_sha_enqueue(req, 1); | |
1198 | } | |
1199 | ||
1200 | static int sahara_sha_digest(struct ahash_request *req) | |
1201 | { | |
1202 | sahara_sha_init(req); | |
1203 | ||
1204 | return sahara_sha_finup(req); | |
1205 | } | |
1206 | ||
1207 | static int sahara_sha_export(struct ahash_request *req, void *out) | |
1208 | { | |
1209 | struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); | |
1210 | struct sahara_ctx *ctx = crypto_ahash_ctx(ahash); | |
1211 | struct sahara_sha_reqctx *rctx = ahash_request_ctx(req); | |
1212 | ||
1213 | memcpy(out, ctx, sizeof(struct sahara_ctx)); | |
1214 | memcpy(out + sizeof(struct sahara_sha_reqctx), rctx, | |
1215 | sizeof(struct sahara_sha_reqctx)); | |
1216 | ||
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | static int sahara_sha_import(struct ahash_request *req, const void *in) | |
1221 | { | |
1222 | struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); | |
1223 | struct sahara_ctx *ctx = crypto_ahash_ctx(ahash); | |
1224 | struct sahara_sha_reqctx *rctx = ahash_request_ctx(req); | |
1225 | ||
1226 | memcpy(ctx, in, sizeof(struct sahara_ctx)); | |
1227 | memcpy(rctx, in + sizeof(struct sahara_sha_reqctx), | |
1228 | sizeof(struct sahara_sha_reqctx)); | |
1229 | ||
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static int sahara_sha_cra_init(struct crypto_tfm *tfm) | |
1234 | { | |
1235 | const char *name = crypto_tfm_alg_name(tfm); | |
1236 | struct sahara_ctx *ctx = crypto_tfm_ctx(tfm); | |
1237 | ||
1238 | ctx->shash_fallback = crypto_alloc_shash(name, 0, | |
1239 | CRYPTO_ALG_NEED_FALLBACK); | |
1240 | if (IS_ERR(ctx->shash_fallback)) { | |
1241 | pr_err("Error allocating fallback algo %s\n", name); | |
1242 | return PTR_ERR(ctx->shash_fallback); | |
1243 | } | |
1244 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), | |
1245 | sizeof(struct sahara_sha_reqctx) + | |
1246 | SHA_BUFFER_LEN + SHA256_BLOCK_SIZE); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static void sahara_sha_cra_exit(struct crypto_tfm *tfm) | |
1252 | { | |
1253 | struct sahara_ctx *ctx = crypto_tfm_ctx(tfm); | |
1254 | ||
1255 | crypto_free_shash(ctx->shash_fallback); | |
1256 | ctx->shash_fallback = NULL; | |
1257 | } | |
1258 | ||
5de88752 JM |
1259 | static struct crypto_alg aes_algs[] = { |
1260 | { | |
1261 | .cra_name = "ecb(aes)", | |
1262 | .cra_driver_name = "sahara-ecb-aes", | |
1263 | .cra_priority = 300, | |
1264 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
1265 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, | |
1266 | .cra_blocksize = AES_BLOCK_SIZE, | |
1267 | .cra_ctxsize = sizeof(struct sahara_ctx), | |
1268 | .cra_alignmask = 0x0, | |
1269 | .cra_type = &crypto_ablkcipher_type, | |
1270 | .cra_module = THIS_MODULE, | |
1271 | .cra_init = sahara_aes_cra_init, | |
1272 | .cra_exit = sahara_aes_cra_exit, | |
1273 | .cra_u.ablkcipher = { | |
1274 | .min_keysize = AES_MIN_KEY_SIZE , | |
1275 | .max_keysize = AES_MAX_KEY_SIZE, | |
1276 | .setkey = sahara_aes_setkey, | |
1277 | .encrypt = sahara_aes_ecb_encrypt, | |
1278 | .decrypt = sahara_aes_ecb_decrypt, | |
1279 | } | |
1280 | }, { | |
1281 | .cra_name = "cbc(aes)", | |
1282 | .cra_driver_name = "sahara-cbc-aes", | |
1283 | .cra_priority = 300, | |
1284 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
1285 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, | |
1286 | .cra_blocksize = AES_BLOCK_SIZE, | |
1287 | .cra_ctxsize = sizeof(struct sahara_ctx), | |
1288 | .cra_alignmask = 0x0, | |
1289 | .cra_type = &crypto_ablkcipher_type, | |
1290 | .cra_module = THIS_MODULE, | |
1291 | .cra_init = sahara_aes_cra_init, | |
1292 | .cra_exit = sahara_aes_cra_exit, | |
1293 | .cra_u.ablkcipher = { | |
1294 | .min_keysize = AES_MIN_KEY_SIZE , | |
1295 | .max_keysize = AES_MAX_KEY_SIZE, | |
1296 | .ivsize = AES_BLOCK_SIZE, | |
1297 | .setkey = sahara_aes_setkey, | |
1298 | .encrypt = sahara_aes_cbc_encrypt, | |
1299 | .decrypt = sahara_aes_cbc_decrypt, | |
1300 | } | |
1301 | } | |
1302 | }; | |
1303 | ||
5a2bb93f ST |
1304 | static struct ahash_alg sha_v3_algs[] = { |
1305 | { | |
1306 | .init = sahara_sha_init, | |
1307 | .update = sahara_sha_update, | |
1308 | .final = sahara_sha_final, | |
1309 | .finup = sahara_sha_finup, | |
1310 | .digest = sahara_sha_digest, | |
1311 | .export = sahara_sha_export, | |
1312 | .import = sahara_sha_import, | |
1313 | .halg.digestsize = SHA1_DIGEST_SIZE, | |
1314 | .halg.base = { | |
1315 | .cra_name = "sha1", | |
1316 | .cra_driver_name = "sahara-sha1", | |
1317 | .cra_priority = 300, | |
1318 | .cra_flags = CRYPTO_ALG_TYPE_AHASH | | |
1319 | CRYPTO_ALG_ASYNC | | |
1320 | CRYPTO_ALG_NEED_FALLBACK, | |
1321 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
1322 | .cra_ctxsize = sizeof(struct sahara_ctx), | |
1323 | .cra_alignmask = 0, | |
1324 | .cra_module = THIS_MODULE, | |
1325 | .cra_init = sahara_sha_cra_init, | |
1326 | .cra_exit = sahara_sha_cra_exit, | |
1327 | } | |
1328 | }, | |
1329 | }; | |
1330 | ||
1331 | static struct ahash_alg sha_v4_algs[] = { | |
1332 | { | |
1333 | .init = sahara_sha_init, | |
1334 | .update = sahara_sha_update, | |
1335 | .final = sahara_sha_final, | |
1336 | .finup = sahara_sha_finup, | |
1337 | .digest = sahara_sha_digest, | |
1338 | .export = sahara_sha_export, | |
1339 | .import = sahara_sha_import, | |
1340 | .halg.digestsize = SHA256_DIGEST_SIZE, | |
1341 | .halg.base = { | |
1342 | .cra_name = "sha256", | |
1343 | .cra_driver_name = "sahara-sha256", | |
1344 | .cra_priority = 300, | |
1345 | .cra_flags = CRYPTO_ALG_TYPE_AHASH | | |
1346 | CRYPTO_ALG_ASYNC | | |
1347 | CRYPTO_ALG_NEED_FALLBACK, | |
1348 | .cra_blocksize = SHA256_BLOCK_SIZE, | |
1349 | .cra_ctxsize = sizeof(struct sahara_ctx), | |
1350 | .cra_alignmask = 0, | |
1351 | .cra_module = THIS_MODULE, | |
1352 | .cra_init = sahara_sha_cra_init, | |
1353 | .cra_exit = sahara_sha_cra_exit, | |
1354 | } | |
1355 | }, | |
1356 | }; | |
1357 | ||
5de88752 JM |
1358 | static irqreturn_t sahara_irq_handler(int irq, void *data) |
1359 | { | |
1360 | struct sahara_dev *dev = (struct sahara_dev *)data; | |
1361 | unsigned int stat = sahara_read(dev, SAHARA_REG_STATUS); | |
1362 | unsigned int err = sahara_read(dev, SAHARA_REG_ERRSTATUS); | |
1363 | ||
5de88752 JM |
1364 | sahara_write(dev, SAHARA_CMD_CLEAR_INT | SAHARA_CMD_CLEAR_ERR, |
1365 | SAHARA_REG_CMD); | |
1366 | ||
1367 | sahara_decode_status(dev, stat); | |
1368 | ||
1369 | if (SAHARA_STATUS_GET_STATE(stat) == SAHARA_STATE_BUSY) { | |
1370 | return IRQ_NONE; | |
1371 | } else if (SAHARA_STATUS_GET_STATE(stat) == SAHARA_STATE_COMPLETE) { | |
1372 | dev->error = 0; | |
1373 | } else { | |
1374 | sahara_decode_error(dev, err); | |
1375 | dev->error = -EINVAL; | |
1376 | } | |
1377 | ||
c0c3c89a | 1378 | complete(&dev->dma_completion); |
5de88752 JM |
1379 | |
1380 | return IRQ_HANDLED; | |
1381 | } | |
1382 | ||
1383 | ||
1384 | static int sahara_register_algs(struct sahara_dev *dev) | |
1385 | { | |
5a2bb93f ST |
1386 | int err; |
1387 | unsigned int i, j, k, l; | |
5de88752 JM |
1388 | |
1389 | for (i = 0; i < ARRAY_SIZE(aes_algs); i++) { | |
1390 | INIT_LIST_HEAD(&aes_algs[i].cra_list); | |
1391 | err = crypto_register_alg(&aes_algs[i]); | |
1392 | if (err) | |
1393 | goto err_aes_algs; | |
1394 | } | |
1395 | ||
5a2bb93f ST |
1396 | for (k = 0; k < ARRAY_SIZE(sha_v3_algs); k++) { |
1397 | err = crypto_register_ahash(&sha_v3_algs[k]); | |
1398 | if (err) | |
1399 | goto err_sha_v3_algs; | |
1400 | } | |
1401 | ||
1402 | if (dev->version > SAHARA_VERSION_3) | |
1403 | for (l = 0; l < ARRAY_SIZE(sha_v4_algs); l++) { | |
1404 | err = crypto_register_ahash(&sha_v4_algs[l]); | |
1405 | if (err) | |
1406 | goto err_sha_v4_algs; | |
1407 | } | |
1408 | ||
5de88752 JM |
1409 | return 0; |
1410 | ||
5a2bb93f ST |
1411 | err_sha_v4_algs: |
1412 | for (j = 0; j < l; j++) | |
1413 | crypto_unregister_ahash(&sha_v4_algs[j]); | |
1414 | ||
1415 | err_sha_v3_algs: | |
1416 | for (j = 0; j < k; j++) | |
1417 | crypto_unregister_ahash(&sha_v4_algs[j]); | |
1418 | ||
5de88752 JM |
1419 | err_aes_algs: |
1420 | for (j = 0; j < i; j++) | |
1421 | crypto_unregister_alg(&aes_algs[j]); | |
1422 | ||
1423 | return err; | |
1424 | } | |
1425 | ||
1426 | static void sahara_unregister_algs(struct sahara_dev *dev) | |
1427 | { | |
5a2bb93f | 1428 | unsigned int i; |
5de88752 JM |
1429 | |
1430 | for (i = 0; i < ARRAY_SIZE(aes_algs); i++) | |
1431 | crypto_unregister_alg(&aes_algs[i]); | |
5a2bb93f ST |
1432 | |
1433 | for (i = 0; i < ARRAY_SIZE(sha_v4_algs); i++) | |
1434 | crypto_unregister_ahash(&sha_v3_algs[i]); | |
1435 | ||
1436 | if (dev->version > SAHARA_VERSION_3) | |
1437 | for (i = 0; i < ARRAY_SIZE(sha_v4_algs); i++) | |
1438 | crypto_unregister_ahash(&sha_v4_algs[i]); | |
5de88752 JM |
1439 | } |
1440 | ||
1441 | static struct platform_device_id sahara_platform_ids[] = { | |
1442 | { .name = "sahara-imx27" }, | |
1443 | { /* sentinel */ } | |
1444 | }; | |
1445 | MODULE_DEVICE_TABLE(platform, sahara_platform_ids); | |
1446 | ||
1447 | static struct of_device_id sahara_dt_ids[] = { | |
5ed903b3 | 1448 | { .compatible = "fsl,imx53-sahara" }, |
5de88752 JM |
1449 | { .compatible = "fsl,imx27-sahara" }, |
1450 | { /* sentinel */ } | |
1451 | }; | |
68be0b1a | 1452 | MODULE_DEVICE_TABLE(of, sahara_dt_ids); |
5de88752 JM |
1453 | |
1454 | static int sahara_probe(struct platform_device *pdev) | |
1455 | { | |
1456 | struct sahara_dev *dev; | |
1457 | struct resource *res; | |
1458 | u32 version; | |
1459 | int irq; | |
1460 | int err; | |
1461 | int i; | |
1462 | ||
1463 | dev = devm_kzalloc(&pdev->dev, sizeof(struct sahara_dev), GFP_KERNEL); | |
1464 | if (dev == NULL) { | |
1465 | dev_err(&pdev->dev, "unable to alloc data struct.\n"); | |
1466 | return -ENOMEM; | |
1467 | } | |
1468 | ||
1469 | dev->device = &pdev->dev; | |
1470 | platform_set_drvdata(pdev, dev); | |
1471 | ||
1472 | /* Get the base address */ | |
1473 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
9e95275c JH |
1474 | dev->regs_base = devm_ioremap_resource(&pdev->dev, res); |
1475 | if (IS_ERR(dev->regs_base)) | |
1476 | return PTR_ERR(dev->regs_base); | |
5de88752 JM |
1477 | |
1478 | /* Get the IRQ */ | |
1479 | irq = platform_get_irq(pdev, 0); | |
1480 | if (irq < 0) { | |
1481 | dev_err(&pdev->dev, "failed to get irq resource\n"); | |
1482 | return irq; | |
1483 | } | |
1484 | ||
3d6f1d12 AS |
1485 | err = devm_request_irq(&pdev->dev, irq, sahara_irq_handler, |
1486 | 0, dev_name(&pdev->dev), dev); | |
1487 | if (err) { | |
5de88752 | 1488 | dev_err(&pdev->dev, "failed to request irq\n"); |
3d6f1d12 | 1489 | return err; |
5de88752 JM |
1490 | } |
1491 | ||
1492 | /* clocks */ | |
1493 | dev->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); | |
1494 | if (IS_ERR(dev->clk_ipg)) { | |
1495 | dev_err(&pdev->dev, "Could not get ipg clock\n"); | |
1496 | return PTR_ERR(dev->clk_ipg); | |
1497 | } | |
1498 | ||
1499 | dev->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); | |
1500 | if (IS_ERR(dev->clk_ahb)) { | |
1501 | dev_err(&pdev->dev, "Could not get ahb clock\n"); | |
1502 | return PTR_ERR(dev->clk_ahb); | |
1503 | } | |
1504 | ||
1505 | /* Allocate HW descriptors */ | |
1506 | dev->hw_desc[0] = dma_alloc_coherent(&pdev->dev, | |
1507 | SAHARA_MAX_HW_DESC * sizeof(struct sahara_hw_desc), | |
1508 | &dev->hw_phys_desc[0], GFP_KERNEL); | |
1509 | if (!dev->hw_desc[0]) { | |
1510 | dev_err(&pdev->dev, "Could not allocate hw descriptors\n"); | |
1511 | return -ENOMEM; | |
1512 | } | |
1513 | dev->hw_desc[1] = dev->hw_desc[0] + 1; | |
1514 | dev->hw_phys_desc[1] = dev->hw_phys_desc[0] + | |
1515 | sizeof(struct sahara_hw_desc); | |
1516 | ||
1517 | /* Allocate space for iv and key */ | |
1518 | dev->key_base = dma_alloc_coherent(&pdev->dev, 2 * AES_KEYSIZE_128, | |
1519 | &dev->key_phys_base, GFP_KERNEL); | |
1520 | if (!dev->key_base) { | |
1521 | dev_err(&pdev->dev, "Could not allocate memory for key\n"); | |
1522 | err = -ENOMEM; | |
1523 | goto err_key; | |
1524 | } | |
1525 | dev->iv_base = dev->key_base + AES_KEYSIZE_128; | |
1526 | dev->iv_phys_base = dev->key_phys_base + AES_KEYSIZE_128; | |
1527 | ||
5a2bb93f ST |
1528 | /* Allocate space for context: largest digest + message length field */ |
1529 | dev->context_base = dma_alloc_coherent(&pdev->dev, | |
1530 | SHA256_DIGEST_SIZE + 4, | |
1531 | &dev->context_phys_base, GFP_KERNEL); | |
1532 | if (!dev->context_base) { | |
1533 | dev_err(&pdev->dev, "Could not allocate memory for MDHA context\n"); | |
1534 | err = -ENOMEM; | |
1535 | goto err_key; | |
1536 | } | |
1537 | ||
5de88752 JM |
1538 | /* Allocate space for HW links */ |
1539 | dev->hw_link[0] = dma_alloc_coherent(&pdev->dev, | |
1540 | SAHARA_MAX_HW_LINK * sizeof(struct sahara_hw_link), | |
1541 | &dev->hw_phys_link[0], GFP_KERNEL); | |
393e661d | 1542 | if (!dev->hw_link[0]) { |
5de88752 JM |
1543 | dev_err(&pdev->dev, "Could not allocate hw links\n"); |
1544 | err = -ENOMEM; | |
1545 | goto err_link; | |
1546 | } | |
1547 | for (i = 1; i < SAHARA_MAX_HW_LINK; i++) { | |
1548 | dev->hw_phys_link[i] = dev->hw_phys_link[i - 1] + | |
1549 | sizeof(struct sahara_hw_link); | |
1550 | dev->hw_link[i] = dev->hw_link[i - 1] + 1; | |
1551 | } | |
1552 | ||
1553 | crypto_init_queue(&dev->queue, SAHARA_QUEUE_LENGTH); | |
1554 | ||
20ec9d81 | 1555 | spin_lock_init(&dev->lock); |
c0c3c89a | 1556 | mutex_init(&dev->queue_mutex); |
20ec9d81 | 1557 | |
5de88752 JM |
1558 | dev_ptr = dev; |
1559 | ||
c0c3c89a ST |
1560 | dev->kthread = kthread_run(sahara_queue_manage, dev, "sahara_crypto"); |
1561 | if (IS_ERR(dev->kthread)) { | |
1562 | err = PTR_ERR(dev->kthread); | |
1563 | goto err_link; | |
1564 | } | |
5de88752 | 1565 | |
c0c3c89a | 1566 | init_completion(&dev->dma_completion); |
5de88752 JM |
1567 | |
1568 | clk_prepare_enable(dev->clk_ipg); | |
1569 | clk_prepare_enable(dev->clk_ahb); | |
1570 | ||
1571 | version = sahara_read(dev, SAHARA_REG_VERSION); | |
5ed903b3 ST |
1572 | if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx27-sahara")) { |
1573 | if (version != SAHARA_VERSION_3) | |
1574 | err = -ENODEV; | |
1575 | } else if (of_device_is_compatible(pdev->dev.of_node, | |
1576 | "fsl,imx53-sahara")) { | |
1577 | if (((version >> 8) & 0xff) != SAHARA_VERSION_4) | |
1578 | err = -ENODEV; | |
1579 | version = (version >> 8) & 0xff; | |
1580 | } | |
1581 | if (err == -ENODEV) { | |
5de88752 | 1582 | dev_err(&pdev->dev, "SAHARA version %d not supported\n", |
5ed903b3 | 1583 | version); |
5de88752 JM |
1584 | goto err_algs; |
1585 | } | |
1586 | ||
5ed903b3 ST |
1587 | dev->version = version; |
1588 | ||
5de88752 JM |
1589 | sahara_write(dev, SAHARA_CMD_RESET | SAHARA_CMD_MODE_BATCH, |
1590 | SAHARA_REG_CMD); | |
1591 | sahara_write(dev, SAHARA_CONTROL_SET_THROTTLE(0) | | |
1592 | SAHARA_CONTROL_SET_MAXBURST(8) | | |
1593 | SAHARA_CONTROL_RNG_AUTORSD | | |
1594 | SAHARA_CONTROL_ENABLE_INT, | |
1595 | SAHARA_REG_CONTROL); | |
1596 | ||
1597 | err = sahara_register_algs(dev); | |
1598 | if (err) | |
1599 | goto err_algs; | |
1600 | ||
1601 | dev_info(&pdev->dev, "SAHARA version %d initialized\n", version); | |
1602 | ||
1603 | return 0; | |
1604 | ||
1605 | err_algs: | |
1606 | dma_free_coherent(&pdev->dev, | |
1607 | SAHARA_MAX_HW_LINK * sizeof(struct sahara_hw_link), | |
1608 | dev->hw_link[0], dev->hw_phys_link[0]); | |
1609 | clk_disable_unprepare(dev->clk_ipg); | |
1610 | clk_disable_unprepare(dev->clk_ahb); | |
c0c3c89a | 1611 | kthread_stop(dev->kthread); |
5de88752 JM |
1612 | dev_ptr = NULL; |
1613 | err_link: | |
1614 | dma_free_coherent(&pdev->dev, | |
1615 | 2 * AES_KEYSIZE_128, | |
1616 | dev->key_base, dev->key_phys_base); | |
5a2bb93f ST |
1617 | dma_free_coherent(&pdev->dev, |
1618 | SHA256_DIGEST_SIZE, | |
1619 | dev->context_base, dev->context_phys_base); | |
5de88752 JM |
1620 | err_key: |
1621 | dma_free_coherent(&pdev->dev, | |
1622 | SAHARA_MAX_HW_DESC * sizeof(struct sahara_hw_desc), | |
1623 | dev->hw_desc[0], dev->hw_phys_desc[0]); | |
1624 | ||
1625 | return err; | |
1626 | } | |
1627 | ||
1628 | static int sahara_remove(struct platform_device *pdev) | |
1629 | { | |
1630 | struct sahara_dev *dev = platform_get_drvdata(pdev); | |
1631 | ||
1632 | dma_free_coherent(&pdev->dev, | |
1633 | SAHARA_MAX_HW_LINK * sizeof(struct sahara_hw_link), | |
1634 | dev->hw_link[0], dev->hw_phys_link[0]); | |
1635 | dma_free_coherent(&pdev->dev, | |
1636 | 2 * AES_KEYSIZE_128, | |
1637 | dev->key_base, dev->key_phys_base); | |
1638 | dma_free_coherent(&pdev->dev, | |
1639 | SAHARA_MAX_HW_DESC * sizeof(struct sahara_hw_desc), | |
1640 | dev->hw_desc[0], dev->hw_phys_desc[0]); | |
1641 | ||
c0c3c89a | 1642 | kthread_stop(dev->kthread); |
5de88752 JM |
1643 | |
1644 | sahara_unregister_algs(dev); | |
1645 | ||
1646 | clk_disable_unprepare(dev->clk_ipg); | |
1647 | clk_disable_unprepare(dev->clk_ahb); | |
1648 | ||
1649 | dev_ptr = NULL; | |
1650 | ||
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | static struct platform_driver sahara_driver = { | |
1655 | .probe = sahara_probe, | |
1656 | .remove = sahara_remove, | |
1657 | .driver = { | |
1658 | .name = SAHARA_NAME, | |
1b0b2605 | 1659 | .of_match_table = sahara_dt_ids, |
5de88752 JM |
1660 | }, |
1661 | .id_table = sahara_platform_ids, | |
1662 | }; | |
1663 | ||
1664 | module_platform_driver(sahara_driver); | |
1665 | ||
1666 | MODULE_LICENSE("GPL"); | |
1667 | MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com>"); | |
5a2bb93f | 1668 | MODULE_AUTHOR("Steffen Trumtrar <s.trumtrar@pengutronix.de>"); |
5de88752 | 1669 | MODULE_DESCRIPTION("SAHARA2 HW crypto accelerator"); |