1 /* SPDX-License-Identifier: GPL-2.0 */
3 * K3 SA2UL crypto accelerator driver
5 * Copyright (C) 2018-2020 Texas Instruments Incorporated - http://www.ti.com
15 #include <crypto/aes.h>
16 #include <crypto/sha1.h>
17 #include <crypto/sha2.h>
19 #define SA_ENGINE_ENABLE_CONTROL 0x1000
23 * SA_ENGINE_ENABLE_CONTROL register bits
25 #define SA_EEC_ENCSS_EN 0x00000001
26 #define SA_EEC_AUTHSS_EN 0x00000002
27 #define SA_EEC_TRNG_EN 0x00000008
28 #define SA_EEC_PKA_EN 0x00000010
29 #define SA_EEC_CTXCACH_EN 0x00000080
30 #define SA_EEC_CPPI_PORT_IN_EN 0x00000200
31 #define SA_EEC_CPPI_PORT_OUT_EN 0x00000800
34 * Encoding used to identify the typo of crypto operation
35 * performed on the packet when the packet is returned
38 #define SA_REQ_SUBTYPE_ENC 0x0001
39 #define SA_REQ_SUBTYPE_DEC 0x0002
40 #define SA_REQ_SUBTYPE_SHIFT 16
41 #define SA_REQ_SUBTYPE_MASK 0xffff
43 /* Number of 32 bit words in EPIB */
44 #define SA_DMA_NUM_EPIB_WORDS 4
46 /* Number of 32 bit words in PS data */
47 #define SA_DMA_NUM_PS_WORDS 16
52 * Maximum number of simultaeneous security contexts
53 * supported by the driver
55 #define SA_MAX_NUM_CTX 512
58 * Assumption: CTX size is multiple of 32
60 #define SA_CTX_SIZE_TO_DMA_SIZE(ctx_sz) \
61 ((ctx_sz) ? ((ctx_sz) / 32 - 1) : 0)
63 #define SA_CTX_ENC_KEY_OFFSET 32
64 #define SA_CTX_ENC_AUX1_OFFSET 64
65 #define SA_CTX_ENC_AUX2_OFFSET 96
66 #define SA_CTX_ENC_AUX3_OFFSET 112
67 #define SA_CTX_ENC_AUX4_OFFSET 128
69 /* Next Engine Select code in CP_ACE */
70 #define SA_ENG_ID_EM1 2 /* Enc/Dec engine with AES/DEC core */
71 #define SA_ENG_ID_EM2 3 /* Encryption/Decryption enginefor pass 2 */
72 #define SA_ENG_ID_AM1 4 /* Auth. engine with SHA1/MD5/SHA2 core */
73 #define SA_ENG_ID_AM2 5 /* Authentication engine for pass 2 */
74 #define SA_ENG_ID_OUTPORT2 20 /* Egress module 2 */
77 * Command Label Definitions
79 #define SA_CMDL_OFFSET_NESC 0 /* Next Engine Select Code */
80 #define SA_CMDL_OFFSET_LABEL_LEN 1 /* Engine Command Label Length */
81 /* 16-bit Length of Data to be processed */
82 #define SA_CMDL_OFFSET_DATA_LEN 2
83 #define SA_CMDL_OFFSET_DATA_OFFSET 4 /* Stat Data Offset */
84 #define SA_CMDL_OFFSET_OPTION_CTRL1 5 /* Option Control Byte 1 */
85 #define SA_CMDL_OFFSET_OPTION_CTRL2 6 /* Option Control Byte 2 */
86 #define SA_CMDL_OFFSET_OPTION_CTRL3 7 /* Option Control Byte 3 */
87 #define SA_CMDL_OFFSET_OPTION_BYTE 8
89 #define SA_CMDL_HEADER_SIZE_BYTES 8
91 #define SA_CMDL_OPTION_BYTES_MAX_SIZE 72
92 #define SA_CMDL_MAX_SIZE_BYTES (SA_CMDL_HEADER_SIZE_BYTES + \
93 SA_CMDL_OPTION_BYTES_MAX_SIZE)
95 /* SWINFO word-0 flags */
96 #define SA_SW_INFO_FLAG_EVICT 0x0001
97 #define SA_SW_INFO_FLAG_TEAR 0x0002
98 #define SA_SW_INFO_FLAG_NOPD 0x0004
101 * This type represents the various packet types to be processed
102 * by the PHP engine in SA.
103 * It is used to identify the corresponding PHP processing function.
105 #define SA_CTX_PE_PKT_TYPE_3GPP_AIR 0 /* 3GPP Air Cipher */
106 #define SA_CTX_PE_PKT_TYPE_SRTP 1 /* SRTP */
107 #define SA_CTX_PE_PKT_TYPE_IPSEC_AH 2 /* IPSec Authentication Header */
108 /* IPSec Encapsulating Security Payload */
109 #define SA_CTX_PE_PKT_TYPE_IPSEC_ESP 3
110 /* Indicates that it is in data mode, It may not be used by PHP */
111 #define SA_CTX_PE_PKT_TYPE_NONE 4
112 #define SA_CTX_ENC_TYPE1_SZ 64 /* Encryption SC with Key only */
113 #define SA_CTX_ENC_TYPE2_SZ 96 /* Encryption SC with Key and Aux1 */
115 #define SA_CTX_AUTH_TYPE1_SZ 64 /* Auth SC with Key only */
116 #define SA_CTX_AUTH_TYPE2_SZ 96 /* Auth SC with Key and Aux1 */
117 /* Size of security context for PHP engine */
118 #define SA_CTX_PHP_PE_CTX_SZ 64
120 #define SA_CTX_MAX_SZ (64 + SA_CTX_ENC_TYPE2_SZ + SA_CTX_AUTH_TYPE2_SZ)
123 * Encoding of F/E control in SCCTL
124 * Bit 0-1: Fetch PHP Bytes
125 * Bit 2-3: Fetch Encryption/Air Ciphering Bytes
126 * Bit 4-5: Fetch Authentication Bytes or Encr pass 2
127 * Bit 6-7: Evict PHP Bytes
134 #define SA_CTX_DMA_SIZE_0 0
135 #define SA_CTX_DMA_SIZE_64 1
136 #define SA_CTX_DMA_SIZE_96 2
137 #define SA_CTX_DMA_SIZE_128 3
140 * Byte offset of the owner word in SCCTL
141 * in the security context
143 #define SA_CTX_SCCTL_OWNER_OFFSET 0
145 #define SA_CTX_ENC_KEY_OFFSET 32
146 #define SA_CTX_ENC_AUX1_OFFSET 64
147 #define SA_CTX_ENC_AUX2_OFFSET 96
148 #define SA_CTX_ENC_AUX3_OFFSET 112
149 #define SA_CTX_ENC_AUX4_OFFSET 128
151 #define SA_SCCTL_FE_AUTH_ENC 0x65
152 #define SA_SCCTL_FE_ENC 0x8D
154 #define SA_ALIGN_MASK (sizeof(u32) - 1)
155 #define SA_ALIGNED __aligned(32)
157 #define SA_AUTH_SW_CTRL_MD5 1
158 #define SA_AUTH_SW_CTRL_SHA1 2
159 #define SA_AUTH_SW_CTRL_SHA224 3
160 #define SA_AUTH_SW_CTRL_SHA256 4
161 #define SA_AUTH_SW_CTRL_SHA384 5
162 #define SA_AUTH_SW_CTRL_SHA512 6
164 /* SA2UL can only handle maximum data size of 64KB */
165 #define SA_MAX_DATA_SZ U16_MAX
168 * SA2UL can provide unpredictable results with packet sizes that fall
169 * the following range, so avoid using it.
171 #define SA_UNSAFE_DATA_SZ_MIN 240
172 #define SA_UNSAFE_DATA_SZ_MAX 256
174 struct sa_match_data;
177 * struct sa_crypto_data - Crypto driver instance data
178 * @base: Base address of the register space
179 * @soc_data: Pointer to SoC specific data
180 * @pdev: Platform device pointer
181 * @sc_pool: security context pool
182 * @dev: Device pointer
183 * @scid_lock: secure context ID lock
184 * @sc_id_start: starting index for SC ID
185 * @sc_id_end: Ending index for SC ID
186 * @sc_id: Security Context ID
187 * @ctx_bm: Bitmap to keep track of Security context ID's
188 * @ctx: SA tfm context pointer
189 * @dma_rx1: Pointer to DMA rx channel for sizes < 256 Bytes
190 * @dma_rx2: Pointer to DMA rx channel for sizes > 256 Bytes
191 * @dma_tx: Pointer to DMA TX channel
193 struct sa_crypto_data {
195 const struct sa_match_data *match_data;
196 struct platform_device *pdev;
197 struct dma_pool *sc_pool;
199 spinlock_t scid_lock; /* lock for SC-ID allocation */
200 /* Security context data */
204 unsigned long ctx_bm[DIV_ROUND_UP(SA_MAX_NUM_CTX,
206 struct sa_tfm_ctx *ctx;
207 struct dma_chan *dma_rx1;
208 struct dma_chan *dma_rx2;
209 struct dma_chan *dma_tx;
213 * struct sa_cmdl_param_info: Command label parameters info
214 * @index: Index of the parameter in the command label format
215 * @offset: the offset of the parameter
216 * @size: Size of the parameter
218 struct sa_cmdl_param_info {
224 /* Maximum length of Auxiliary data in 32bit words */
225 #define SA_MAX_AUX_DATA_WORDS 8
228 * struct sa_cmdl_upd_info: Command label updation info
229 * @flags: flags in command label
230 * @submode: Encryption submodes
231 * @enc_size: Size of first pass encryption size
232 * @enc_size2: Size of second pass encryption size
233 * @enc_offset: Encryption payload offset in the packet
234 * @enc_iv: Encryption initialization vector for pass2
235 * @enc_iv2: Encryption initialization vector for pass2
236 * @aad: Associated data
237 * @payload: Payload info
238 * @auth_size: Authentication size for pass 1
239 * @auth_size2: Authentication size for pass 2
240 * @auth_offset: Authentication payload offset
241 * @auth_iv: Authentication initialization vector
242 * @aux_key_info: Authentication aux key information
243 * @aux_key: Aux key for authentication
245 struct sa_cmdl_upd_info {
248 struct sa_cmdl_param_info enc_size;
249 struct sa_cmdl_param_info enc_size2;
250 struct sa_cmdl_param_info enc_offset;
251 struct sa_cmdl_param_info enc_iv;
252 struct sa_cmdl_param_info enc_iv2;
253 struct sa_cmdl_param_info aad;
254 struct sa_cmdl_param_info payload;
255 struct sa_cmdl_param_info auth_size;
256 struct sa_cmdl_param_info auth_size2;
257 struct sa_cmdl_param_info auth_offset;
258 struct sa_cmdl_param_info auth_iv;
259 struct sa_cmdl_param_info aux_key_info;
260 u32 aux_key[SA_MAX_AUX_DATA_WORDS];
264 * Number of 32bit words appended after the command label
265 * in PSDATA to identify the crypto request context.
266 * word-0: Request type
267 * word-1: pointer to request
269 #define SA_PSDATA_CTX_WORDS 4
271 /* Maximum size of Command label in 32 words */
272 #define SA_MAX_CMDL_WORDS (SA_DMA_NUM_PS_WORDS - SA_PSDATA_CTX_WORDS)
275 * struct sa_ctx_info: SA context information
276 * @sc: Pointer to security context
277 * @sc_phys: Security context physical address that is passed on to SA2UL
278 * @sc_id: Security context ID
279 * @cmdl_size: Command label size
280 * @cmdl: Command label for a particular iteration
281 * @cmdl_upd_info: structure holding command label updation info
282 * @epib: Extended protocol information block words
289 u32 cmdl[SA_MAX_CMDL_WORDS];
290 struct sa_cmdl_upd_info cmdl_upd_info;
291 /* Store Auxiliary data such as K2/K3 subkeys in AES-XCBC */
292 u32 epib[SA_DMA_NUM_EPIB_WORDS];
296 * struct sa_tfm_ctx: TFM context structure
297 * @dev_data: struct sa_crypto_data pointer
298 * @enc: struct sa_ctx_info for encryption
299 * @dec: struct sa_ctx_info for decryption
300 * @keylen: encrption/decryption keylength
301 * @iv_idx: Initialization vector index
302 * @key: encryption key
303 * @fallback: SW fallback algorithm
306 struct sa_crypto_data *dev_data;
307 struct sa_ctx_info enc;
308 struct sa_ctx_info dec;
309 struct sa_ctx_info auth;
312 u32 key[AES_KEYSIZE_256 / sizeof(u32)];
313 u8 authkey[SHA512_BLOCK_SIZE];
314 struct crypto_shash *shash;
317 struct crypto_skcipher *skcipher;
318 struct crypto_ahash *ahash;
319 struct crypto_aead *aead;
324 * struct sa_sha_req_ctx: Structure used for sha request
325 * @dev_data: struct sa_crypto_data pointer
326 * @cmdl: Complete command label with psdata and epib included
327 * @fallback_req: SW fallback request container
329 struct sa_sha_req_ctx {
330 struct sa_crypto_data *dev_data;
331 u32 cmdl[SA_MAX_CMDL_WORDS + SA_PSDATA_CTX_WORDS];
332 struct ahash_request fallback_req;
342 /* Encryption algorithms */
344 SA_EALG_ID_NONE = 0, /* No encryption */
345 SA_EALG_ID_NULL, /* NULL encryption */
346 SA_EALG_ID_AES_CTR, /* AES Counter mode */
347 SA_EALG_ID_AES_F8, /* AES F8 mode */
348 SA_EALG_ID_AES_CBC, /* AES CBC mode */
349 SA_EALG_ID_DES_CBC, /* DES CBC mode */
350 SA_EALG_ID_3DES_CBC, /* 3DES CBC mode */
351 SA_EALG_ID_CCM, /* Counter with CBC-MAC mode */
352 SA_EALG_ID_GCM, /* Galois Counter mode */
357 /* Authentication algorithms */
359 SA_AALG_ID_NONE = 0, /* No Authentication */
360 SA_AALG_ID_NULL = SA_EALG_ID_LAST, /* NULL Authentication */
361 SA_AALG_ID_MD5, /* MD5 mode */
362 SA_AALG_ID_SHA1, /* SHA1 mode */
363 SA_AALG_ID_SHA2_224, /* 224-bit SHA2 mode */
364 SA_AALG_ID_SHA2_256, /* 256-bit SHA2 mode */
365 SA_AALG_ID_SHA2_512, /* 512-bit SHA2 mode */
366 SA_AALG_ID_HMAC_MD5, /* HMAC with MD5 mode */
367 SA_AALG_ID_HMAC_SHA1, /* HMAC with SHA1 mode */
368 SA_AALG_ID_HMAC_SHA2_224, /* HMAC with 224-bit SHA2 mode */
369 SA_AALG_ID_HMAC_SHA2_256, /* HMAC with 256-bit SHA2 mode */
370 SA_AALG_ID_GMAC, /* Galois Message Auth. Code mode */
371 SA_AALG_ID_CMAC, /* Cipher-based Mes. Auth. Code mode */
372 SA_AALG_ID_CBC_MAC, /* Cipher Block Chaining */
373 SA_AALG_ID_AES_XCBC /* AES Extended Cipher Block Chaining */
377 * Mode control engine algorithms used to index the
378 * mode control instruction tables
380 enum sa_eng_algo_id {
397 * struct sa_eng_info: Security accelerator engine info
399 * @sc_size: security context size
406 #endif /* _K3_SA2UL_ */