Add CryptoCell AEAD support Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx> --- drivers/crypto/ccree/Makefile | 2 +- drivers/crypto/ccree/cc_aead.c | 2702 ++++++++++++++++++++++++++++++++++ drivers/crypto/ccree/cc_aead.h | 109 ++ drivers/crypto/ccree/cc_buffer_mgr.c | 882 +++++++++++ drivers/crypto/ccree/cc_buffer_mgr.h | 4 + drivers/crypto/ccree/cc_driver.c | 10 + drivers/crypto/ccree/cc_driver.h | 4 + 7 files changed, 3712 insertions(+), 1 deletion(-) create mode 100644 drivers/crypto/ccree/cc_aead.c create mode 100644 drivers/crypto/ccree/cc_aead.h diff --git a/drivers/crypto/ccree/Makefile b/drivers/crypto/ccree/Makefile index 1109480..7cb3082 100644 --- a/drivers/crypto/ccree/Makefile +++ b/drivers/crypto/ccree/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_CRYPTO_DEV_CCREE) := ccree.o -ccree-y := cc_driver.o cc_buffer_mgr.o cc_request_mgr.o cc_cipher.o cc_hash.o cc_ivgen.o cc_sram_mgr.o +ccree-y := cc_driver.o cc_buffer_mgr.o cc_request_mgr.o cc_cipher.o cc_hash.o cc_aead.o cc_ivgen.o cc_sram_mgr.o ccree-$(CONFIG_DEBUG_FS) += cc_debugfs.o ccree-$(CONFIG_PM) += cc_pm.o diff --git a/drivers/crypto/ccree/cc_aead.c b/drivers/crypto/ccree/cc_aead.c new file mode 100644 index 0000000..265adff --- /dev/null +++ b/drivers/crypto/ccree/cc_aead.c @@ -0,0 +1,2702 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <crypto/algapi.h> +#include <crypto/internal/aead.h> +#include <crypto/authenc.h> +#include <crypto/des.h> +#include <linux/rtnetlink.h> +#include "cc_driver.h" +#include "cc_buffer_mgr.h" +#include "cc_aead.h" +#include "cc_request_mgr.h" +#include "cc_hash.h" +#include "cc_sram_mgr.h" + +#define template_aead template_u.aead + +#define MAX_AEAD_SETKEY_SEQ 12 +#define MAX_AEAD_PROCESS_SEQ 23 + +#define MAX_HMAC_DIGEST_SIZE (SHA256_DIGEST_SIZE) +#define MAX_HMAC_BLOCK_SIZE (SHA256_BLOCK_SIZE) + +#define AES_CCM_RFC4309_NONCE_SIZE 3 +#define MAX_NONCE_SIZE CTR_RFC3686_NONCE_SIZE + +/* Value of each ICV_CMP byte (of 8) in case of success */ +#define ICV_VERIF_OK 0x01 + +struct cc_aead_handle { + cc_sram_addr_t sram_workspace_addr; + struct list_head aead_list; +}; + +struct cc_hmac_s { + u8 *padded_authkey; + u8 *ipad_opad; /* IPAD, OPAD*/ + dma_addr_t padded_authkey_dma_addr; + dma_addr_t ipad_opad_dma_addr; +}; + +struct cc_xcbc_s { + u8 *xcbc_keys; /* K1,K2,K3 */ + dma_addr_t xcbc_keys_dma_addr; +}; + +struct cc_aead_ctx { + struct cc_drvdata *drvdata; + u8 ctr_nonce[MAX_NONCE_SIZE]; /* used for ctr3686 iv and aes ccm */ + u8 *enckey; + dma_addr_t enckey_dma_addr; + union { + struct cc_hmac_s hmac; + struct cc_xcbc_s xcbc; + } auth_state; + unsigned int enc_keylen; + unsigned int auth_keylen; + unsigned int authsize; /* Actual (reduced?) size of the MAC/ICv */ + enum drv_cipher_mode cipher_mode; + enum cc_flow_mode flow_mode; + enum drv_hash_mode auth_mode; +}; + +static inline bool valid_assoclen(struct aead_request *req) +{ + return ((req->assoclen == 16) || (req->assoclen == 20)); +} + +static void cc_aead_exit(struct crypto_aead *tfm) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "Clearing context @%p for %s\n", crypto_aead_ctx(tfm), + crypto_tfm_alg_name(&tfm->base)); + + /* Unmap enckey buffer */ + if (ctx->enckey) { + dma_free_coherent(dev, AES_MAX_KEY_SIZE, ctx->enckey, + ctx->enckey_dma_addr); + dev_dbg(dev, "Freed enckey DMA buffer enckey_dma_addr=%pad\n", + &ctx->enckey_dma_addr); + ctx->enckey_dma_addr = 0; + ctx->enckey = NULL; + } + + if (ctx->auth_mode == DRV_HASH_XCBC_MAC) { /* XCBC authetication */ + struct cc_xcbc_s *xcbc = &ctx->auth_state.xcbc; + + if (xcbc->xcbc_keys) { + dma_free_coherent(dev, CC_AES_128_BIT_KEY_SIZE * 3, + xcbc->xcbc_keys, + xcbc->xcbc_keys_dma_addr); + } + dev_dbg(dev, "Freed xcbc_keys DMA buffer xcbc_keys_dma_addr=%pad\n", + &xcbc->xcbc_keys_dma_addr); + xcbc->xcbc_keys_dma_addr = 0; + xcbc->xcbc_keys = NULL; + } else if (ctx->auth_mode != DRV_HASH_NULL) { /* HMAC auth. */ + struct cc_hmac_s *hmac = &ctx->auth_state.hmac; + + if (hmac->ipad_opad) { + dma_free_coherent(dev, 2 * MAX_HMAC_DIGEST_SIZE, + hmac->ipad_opad, + hmac->ipad_opad_dma_addr); + dev_dbg(dev, "Freed ipad_opad DMA buffer ipad_opad_dma_addr=%pad\n", + &hmac->ipad_opad_dma_addr); + hmac->ipad_opad_dma_addr = 0; + hmac->ipad_opad = NULL; + } + if (hmac->padded_authkey) { + dma_free_coherent(dev, MAX_HMAC_BLOCK_SIZE, + hmac->padded_authkey, + hmac->padded_authkey_dma_addr); + dev_dbg(dev, "Freed padded_authkey DMA buffer padded_authkey_dma_addr=%pad\n", + &hmac->padded_authkey_dma_addr); + hmac->padded_authkey_dma_addr = 0; + hmac->padded_authkey = NULL; + } + } +} + +static int cc_aead_init(struct crypto_aead *tfm) +{ + struct aead_alg *alg = crypto_aead_alg(tfm); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct cc_crypto_alg *cc_alg = + container_of(alg, struct cc_crypto_alg, aead_alg); + struct device *dev = drvdata_to_dev(cc_alg->drvdata); + + dev_dbg(dev, "Initializing context @%p for %s\n", ctx, + crypto_tfm_alg_name(&tfm->base)); + + /* Initialize modes in instance */ + ctx->cipher_mode = cc_alg->cipher_mode; + ctx->flow_mode = cc_alg->flow_mode; + ctx->auth_mode = cc_alg->auth_mode; + ctx->drvdata = cc_alg->drvdata; + crypto_aead_set_reqsize(tfm, sizeof(struct aead_req_ctx)); + + /* Allocate key buffer, cache line aligned */ + ctx->enckey = dma_alloc_coherent(dev, AES_MAX_KEY_SIZE, + &ctx->enckey_dma_addr, GFP_KERNEL); + if (!ctx->enckey) { + dev_err(dev, "Failed allocating key buffer\n"); + goto init_failed; + } + dev_dbg(dev, "Allocated enckey buffer in context ctx->enckey=@%p\n", + ctx->enckey); + + /* Set default authlen value */ + + if (ctx->auth_mode == DRV_HASH_XCBC_MAC) { /* XCBC authetication */ + struct cc_xcbc_s *xcbc = &ctx->auth_state.xcbc; + const unsigned int key_size = CC_AES_128_BIT_KEY_SIZE * 3; + + /* Allocate dma-coherent buffer for XCBC's K1+K2+K3 */ + /* (and temporary for user key - up to 256b) */ + xcbc->xcbc_keys = dma_alloc_coherent(dev, key_size, + &xcbc->xcbc_keys_dma_addr, + GFP_KERNEL); + if (!xcbc->xcbc_keys) { + dev_err(dev, "Failed allocating buffer for XCBC keys\n"); + goto init_failed; + } + } else if (ctx->auth_mode != DRV_HASH_NULL) { /* HMAC authentication */ + struct cc_hmac_s *hmac = &ctx->auth_state.hmac; + const unsigned int digest_size = 2 * MAX_HMAC_DIGEST_SIZE; + dma_addr_t *pkey_dma = &hmac->padded_authkey_dma_addr; + + /* Allocate dma-coherent buffer for IPAD + OPAD */ + hmac->ipad_opad = dma_alloc_coherent(dev, digest_size, + &hmac->ipad_opad_dma_addr, + GFP_KERNEL); + + if (!hmac->ipad_opad) { + dev_err(dev, "Failed allocating IPAD/OPAD buffer\n"); + goto init_failed; + } + + dev_dbg(dev, "Allocated authkey buffer in context ctx->authkey=@%p\n", + hmac->ipad_opad); + + hmac->padded_authkey = dma_alloc_coherent(dev, + MAX_HMAC_BLOCK_SIZE, + pkey_dma, + GFP_KERNEL); + + if (!hmac->padded_authkey) { + dev_err(dev, "failed to allocate padded_authkey\n"); + goto init_failed; + } + } else { + ctx->auth_state.hmac.ipad_opad = NULL; + ctx->auth_state.hmac.padded_authkey = NULL; + } + + return 0; + +init_failed: + cc_aead_exit(tfm); + return -ENOMEM; +} + +static void cc_aead_complete(struct device *dev, void *cc_req, int err) +{ + struct aead_request *areq = (struct aead_request *)cc_req; + struct aead_req_ctx *areq_ctx = aead_request_ctx(areq); + struct crypto_aead *tfm = crypto_aead_reqtfm(cc_req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + + cc_unmap_aead_request(dev, areq); + + /* Restore ordinary iv pointer */ + areq->iv = areq_ctx->backup_iv; + + if (err) + goto done; + + if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) { + if (memcmp(areq_ctx->mac_buf, areq_ctx->icv_virt_addr, + ctx->authsize) != 0) { + dev_dbg(dev, "Payload authentication failure, (auth-size=%d, cipher=%d)\n", + ctx->authsize, ctx->cipher_mode); + /* In case of payload authentication failure, MUST NOT + * revealed the decrypted message --> zero its memory. + */ + cc_zero_sgl(areq->dst, areq_ctx->cryptlen); + err = -EBADMSG; + } + } else { /*ENCRYPT*/ + if (areq_ctx->is_icv_fragmented) { + u32 skip = areq->cryptlen + areq_ctx->dst_offset; + + cc_copy_sg_portion(dev, areq_ctx->mac_buf, + areq_ctx->dst_sgl, skip, + (skip + ctx->authsize), + CC_SG_FROM_BUF); + } + + /* If an IV was generated, copy it back to the user provided + * buffer. + */ + if (areq_ctx->backup_giv) { + if (ctx->cipher_mode == DRV_CIPHER_CTR) + memcpy(areq_ctx->backup_giv, areq_ctx->ctr_iv + + CTR_RFC3686_NONCE_SIZE, + CTR_RFC3686_IV_SIZE); + else if (ctx->cipher_mode == DRV_CIPHER_CCM) + memcpy(areq_ctx->backup_giv, areq_ctx->ctr_iv + + CCM_BLOCK_IV_OFFSET, CCM_BLOCK_IV_SIZE); + } + } +done: + aead_request_complete(areq, err); +} + +static int xcbc_setkey(struct cc_hw_desc *desc, struct cc_aead_ctx *ctx) +{ + /* Load the AES key */ + hw_desc_init(&desc[0]); + /* We are using for the source/user key the same buffer + * as for the output keys, * because after this key loading it + * is not needed anymore + */ + set_din_type(&desc[0], DMA_DLLI, + ctx->auth_state.xcbc.xcbc_keys_dma_addr, ctx->auth_keylen, + NS_BIT); + set_cipher_mode(&desc[0], DRV_CIPHER_ECB); + set_cipher_config0(&desc[0], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_key_size_aes(&desc[0], ctx->auth_keylen); + set_flow_mode(&desc[0], S_DIN_to_AES); + set_setup_mode(&desc[0], SETUP_LOAD_KEY0); + + hw_desc_init(&desc[1]); + set_din_const(&desc[1], 0x01010101, CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[1], DIN_AES_DOUT); + set_dout_dlli(&desc[1], ctx->auth_state.xcbc.xcbc_keys_dma_addr, + AES_KEYSIZE_128, NS_BIT, 0); + + hw_desc_init(&desc[2]); + set_din_const(&desc[2], 0x02020202, CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[2], DIN_AES_DOUT); + set_dout_dlli(&desc[2], (ctx->auth_state.xcbc.xcbc_keys_dma_addr + + AES_KEYSIZE_128), + AES_KEYSIZE_128, NS_BIT, 0); + + hw_desc_init(&desc[3]); + set_din_const(&desc[3], 0x03030303, CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[3], DIN_AES_DOUT); + set_dout_dlli(&desc[3], (ctx->auth_state.xcbc.xcbc_keys_dma_addr + + 2 * AES_KEYSIZE_128), + AES_KEYSIZE_128, NS_BIT, 0); + + return 4; +} + +static int hmac_setkey(struct cc_hw_desc *desc, struct cc_aead_ctx *ctx) +{ + unsigned int hmac_pad_const[2] = { HMAC_IPAD_CONST, HMAC_OPAD_CONST }; + unsigned int digest_ofs = 0; + unsigned int hash_mode = (ctx->auth_mode == DRV_HASH_SHA1) ? + DRV_HASH_HW_SHA1 : DRV_HASH_HW_SHA256; + unsigned int digest_size = (ctx->auth_mode == DRV_HASH_SHA1) ? + CC_SHA1_DIGEST_SIZE : CC_SHA256_DIGEST_SIZE; + struct cc_hmac_s *hmac = &ctx->auth_state.hmac; + + int idx = 0; + int i; + + /* calc derived HMAC key */ + for (i = 0; i < 2; i++) { + /* Load hash initial state */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_din_sram(&desc[idx], + cc_larval_digest_addr(ctx->drvdata, + ctx->auth_mode), + digest_size); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + idx++; + + /* Load the hash current length*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_din_const(&desc[idx], 0, HASH_LEN_SIZE); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + idx++; + + /* Prepare ipad key */ + hw_desc_init(&desc[idx]); + set_xor_val(&desc[idx], hmac_pad_const[i]); + set_cipher_mode(&desc[idx], hash_mode); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + idx++; + + /* Perform HASH update */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + hmac->padded_authkey_dma_addr, + SHA256_BLOCK_SIZE, NS_BIT); + set_cipher_mode(&desc[idx], hash_mode); + set_xor_active(&desc[idx]); + set_flow_mode(&desc[idx], DIN_HASH); + idx++; + + /* Get the digset */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_dout_dlli(&desc[idx], + (hmac->ipad_opad_dma_addr + digest_ofs), + digest_size, NS_BIT, 0); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_cipher_config1(&desc[idx], HASH_PADDING_DISABLED); + idx++; + + digest_ofs += digest_size; + } + + return idx; +} + +static int validate_keys_sizes(struct cc_aead_ctx *ctx) +{ + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "enc_keylen=%u authkeylen=%u\n", + ctx->enc_keylen, ctx->auth_keylen); + + switch (ctx->auth_mode) { + case DRV_HASH_SHA1: + case DRV_HASH_SHA256: + break; + case DRV_HASH_XCBC_MAC: + if (ctx->auth_keylen != AES_KEYSIZE_128 && + ctx->auth_keylen != AES_KEYSIZE_192 && + ctx->auth_keylen != AES_KEYSIZE_256) + return -ENOTSUPP; + break; + case DRV_HASH_NULL: /* Not authenc (e.g., CCM) - no auth_key) */ + if (ctx->auth_keylen > 0) + return -EINVAL; + break; + default: + dev_err(dev, "Invalid auth_mode=%d\n", ctx->auth_mode); + return -EINVAL; + } + /* Check cipher key size */ + if (ctx->flow_mode == S_DIN_to_DES) { + if (ctx->enc_keylen != DES3_EDE_KEY_SIZE) { + dev_err(dev, "Invalid cipher(3DES) key size: %u\n", + ctx->enc_keylen); + return -EINVAL; + } + } else { /* Default assumed to be AES ciphers */ + if (ctx->enc_keylen != AES_KEYSIZE_128 && + ctx->enc_keylen != AES_KEYSIZE_192 && + ctx->enc_keylen != AES_KEYSIZE_256) { + dev_err(dev, "Invalid cipher(AES) key size: %u\n", + ctx->enc_keylen); + return -EINVAL; + } + } + + return 0; /* All tests of keys sizes passed */ +} + +/* This function prepers the user key so it can pass to the hmac processing + * (copy to intenral buffer or hash in case of key longer than block + */ +static int +cc_get_plain_hmac_key(struct crypto_aead *tfm, const u8 *key, + unsigned int keylen) +{ + dma_addr_t key_dma_addr = 0; + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + u32 larval_addr = cc_larval_digest_addr(ctx->drvdata, ctx->auth_mode); + struct cc_crypto_req cc_req = {}; + unsigned int blocksize; + unsigned int digestsize; + unsigned int hashmode; + unsigned int idx = 0; + int rc = 0; + struct cc_hw_desc desc[MAX_AEAD_SETKEY_SEQ]; + dma_addr_t padded_authkey_dma_addr = + ctx->auth_state.hmac.padded_authkey_dma_addr; + + switch (ctx->auth_mode) { /* auth_key required and >0 */ + case DRV_HASH_SHA1: + blocksize = SHA1_BLOCK_SIZE; + digestsize = SHA1_DIGEST_SIZE; + hashmode = DRV_HASH_HW_SHA1; + break; + case DRV_HASH_SHA256: + default: + blocksize = SHA256_BLOCK_SIZE; + digestsize = SHA256_DIGEST_SIZE; + hashmode = DRV_HASH_HW_SHA256; + } + + if (keylen != 0) { + key_dma_addr = dma_map_single(dev, (void *)key, keylen, + DMA_TO_DEVICE); + if (dma_mapping_error(dev, key_dma_addr)) { + dev_err(dev, "Mapping key va=0x%p len=%u for DMA failed\n", + key, keylen); + return -ENOMEM; + } + if (keylen > blocksize) { + /* Load hash initial state */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hashmode); + set_din_sram(&desc[idx], larval_addr, digestsize); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + idx++; + + /* Load the hash current length*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hashmode); + set_din_const(&desc[idx], 0, HASH_LEN_SIZE); + set_cipher_config1(&desc[idx], HASH_PADDING_ENABLED); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + idx++; + + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + key_dma_addr, keylen, NS_BIT); + set_flow_mode(&desc[idx], DIN_HASH); + idx++; + + /* Get hashed key */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hashmode); + set_dout_dlli(&desc[idx], padded_authkey_dma_addr, + digestsize, NS_BIT, 0); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_cipher_config1(&desc[idx], HASH_PADDING_DISABLED); + set_cipher_config0(&desc[idx], + HASH_DIGEST_RESULT_LITTLE_ENDIAN); + idx++; + + hw_desc_init(&desc[idx]); + set_din_const(&desc[idx], 0, (blocksize - digestsize)); + set_flow_mode(&desc[idx], BYPASS); + set_dout_dlli(&desc[idx], (padded_authkey_dma_addr + + digestsize), (blocksize - digestsize), + NS_BIT, 0); + idx++; + } else { + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, key_dma_addr, + keylen, NS_BIT); + set_flow_mode(&desc[idx], BYPASS); + set_dout_dlli(&desc[idx], padded_authkey_dma_addr, + keylen, NS_BIT, 0); + idx++; + + if ((blocksize - keylen) != 0) { + hw_desc_init(&desc[idx]); + set_din_const(&desc[idx], 0, + (blocksize - keylen)); + set_flow_mode(&desc[idx], BYPASS); + set_dout_dlli(&desc[idx], + (padded_authkey_dma_addr + + keylen), + (blocksize - keylen), NS_BIT, 0); + idx++; + } + } + } else { + hw_desc_init(&desc[idx]); + set_din_const(&desc[idx], 0, (blocksize - keylen)); + set_flow_mode(&desc[idx], BYPASS); + set_dout_dlli(&desc[idx], padded_authkey_dma_addr, + blocksize, NS_BIT, 0); + idx++; + } + + rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, idx); + if (rc) + dev_err(dev, "send_request() failed (rc=%d)\n", rc); + + if (key_dma_addr) + dma_unmap_single(dev, key_dma_addr, keylen, DMA_TO_DEVICE); + + return rc; +} + +static int +cc_aead_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct rtattr *rta = (struct rtattr *)key; + struct cc_crypto_req cc_req = {}; + struct crypto_authenc_key_param *param; + struct cc_hw_desc desc[MAX_AEAD_SETKEY_SEQ]; + int seq_len = 0, rc = -EINVAL; + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "Setting key in context @%p for %s. key=%p keylen=%u\n", + ctx, crypto_tfm_alg_name(crypto_aead_tfm(tfm)), key, keylen); + + /* STAT_PHASE_0: Init and sanity checks */ + + if (ctx->auth_mode != DRV_HASH_NULL) { /* authenc() alg. */ + if (!RTA_OK(rta, keylen)) + goto badkey; + if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) + goto badkey; + if (RTA_PAYLOAD(rta) < sizeof(*param)) + goto badkey; + param = RTA_DATA(rta); + ctx->enc_keylen = be32_to_cpu(param->enckeylen); + key += RTA_ALIGN(rta->rta_len); + keylen -= RTA_ALIGN(rta->rta_len); + if (keylen < ctx->enc_keylen) + goto badkey; + ctx->auth_keylen = keylen - ctx->enc_keylen; + + if (ctx->cipher_mode == DRV_CIPHER_CTR) { + /* the nonce is stored in bytes at end of key */ + if (ctx->enc_keylen < + (AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE)) + goto badkey; + /* Copy nonce from last 4 bytes in CTR key to + * first 4 bytes in CTR IV + */ + memcpy(ctx->ctr_nonce, key + ctx->auth_keylen + + ctx->enc_keylen - CTR_RFC3686_NONCE_SIZE, + CTR_RFC3686_NONCE_SIZE); + /* Set CTR key size */ + ctx->enc_keylen -= CTR_RFC3686_NONCE_SIZE; + } + } else { /* non-authenc - has just one key */ + ctx->enc_keylen = keylen; + ctx->auth_keylen = 0; + } + + rc = validate_keys_sizes(ctx); + if (rc) + goto badkey; + + /* STAT_PHASE_1: Copy key to ctx */ + + /* Get key material */ + memcpy(ctx->enckey, key + ctx->auth_keylen, ctx->enc_keylen); + if (ctx->enc_keylen == 24) + memset(ctx->enckey + 24, 0, CC_AES_KEY_SIZE_MAX - 24); + if (ctx->auth_mode == DRV_HASH_XCBC_MAC) { + memcpy(ctx->auth_state.xcbc.xcbc_keys, key, ctx->auth_keylen); + } else if (ctx->auth_mode != DRV_HASH_NULL) { /* HMAC */ + rc = cc_get_plain_hmac_key(tfm, key, ctx->auth_keylen); + if (rc) + goto badkey; + } + + /* STAT_PHASE_2: Create sequence */ + + switch (ctx->auth_mode) { + case DRV_HASH_SHA1: + case DRV_HASH_SHA256: + seq_len = hmac_setkey(desc, ctx); + break; + case DRV_HASH_XCBC_MAC: + seq_len = xcbc_setkey(desc, ctx); + break; + case DRV_HASH_NULL: /* non-authenc modes, e.g., CCM */ + break; /* No auth. key setup */ + default: + dev_err(dev, "Unsupported authenc (%d)\n", ctx->auth_mode); + rc = -ENOTSUPP; + goto badkey; + } + + /* STAT_PHASE_3: Submit sequence to HW */ + + if (seq_len > 0) { /* For CCM there is no sequence to setup the key */ + rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, seq_len); + if (rc) { + dev_err(dev, "send_request() failed (rc=%d)\n", rc); + goto setkey_error; + } + } + + /* Update STAT_PHASE_3 */ + return rc; + +badkey: + crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); + +setkey_error: + return rc; +} + +static int cc_rfc4309_ccm_setkey(struct crypto_aead *tfm, const u8 *key, + unsigned int keylen) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + + if (keylen < 3) + return -EINVAL; + + keylen -= 3; + memcpy(ctx->ctr_nonce, key + keylen, 3); + + return cc_aead_setkey(tfm, key, keylen); +} + +static int cc_aead_setauthsize(struct crypto_aead *authenc, + unsigned int authsize) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(authenc); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + /* Unsupported auth. sizes */ + if (authsize == 0 || + authsize > crypto_aead_maxauthsize(authenc)) { + return -ENOTSUPP; + } + + ctx->authsize = authsize; + dev_dbg(dev, "authlen=%d\n", ctx->authsize); + + return 0; +} + +static int cc_rfc4309_ccm_setauthsize(struct crypto_aead *authenc, + unsigned int authsize) +{ + switch (authsize) { + case 8: + case 12: + case 16: + break; + default: + return -EINVAL; + } + + return cc_aead_setauthsize(authenc, authsize); +} + +static int cc_ccm_setauthsize(struct crypto_aead *authenc, + unsigned int authsize) +{ + switch (authsize) { + case 4: + case 6: + case 8: + case 10: + case 12: + case 14: + case 16: + break; + default: + return -EINVAL; + } + + return cc_aead_setauthsize(authenc, authsize); +} + +static void cc_set_assoc_desc(struct aead_request *areq, unsigned int flow_mode, + struct cc_hw_desc desc[], unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(areq); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *areq_ctx = aead_request_ctx(areq); + enum cc_req_dma_buf_type assoc_dma_type = areq_ctx->assoc_buff_type; + unsigned int idx = *seq_size; + struct device *dev = drvdata_to_dev(ctx->drvdata); + + switch (assoc_dma_type) { + case CC_DMA_BUF_DLLI: + dev_dbg(dev, "ASSOC buffer type DLLI\n"); + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, sg_dma_address(areq->src), + areq->assoclen, NS_BIT); + set_flow_mode(&desc[idx], flow_mode); + if (ctx->auth_mode == DRV_HASH_XCBC_MAC && + areq_ctx->cryptlen > 0) + set_din_not_last_indication(&desc[idx]); + break; + case CC_DMA_BUF_MLLI: + dev_dbg(dev, "ASSOC buffer type MLLI\n"); + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_MLLI, areq_ctx->assoc.sram_addr, + areq_ctx->assoc.mlli_nents, NS_BIT); + set_flow_mode(&desc[idx], flow_mode); + if (ctx->auth_mode == DRV_HASH_XCBC_MAC && + areq_ctx->cryptlen > 0) + set_din_not_last_indication(&desc[idx]); + break; + case CC_DMA_BUF_NULL: + default: + dev_err(dev, "Invalid ASSOC buffer type\n"); + } + + *seq_size = (++idx); +} + +static void cc_proc_authen_desc(struct aead_request *areq, + unsigned int flow_mode, + struct cc_hw_desc desc[], + unsigned int *seq_size, int direct) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(areq); + enum cc_req_dma_buf_type data_dma_type = areq_ctx->data_buff_type; + unsigned int idx = *seq_size; + struct crypto_aead *tfm = crypto_aead_reqtfm(areq); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + switch (data_dma_type) { + case CC_DMA_BUF_DLLI: + { + struct scatterlist *cipher = + (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ? + areq_ctx->dst_sgl : areq_ctx->src_sgl; + + unsigned int offset = + (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ? + areq_ctx->dst_offset : areq_ctx->src_offset; + dev_dbg(dev, "AUTHENC: SRC/DST buffer type DLLI\n"); + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + (sg_dma_address(cipher) + offset), + areq_ctx->cryptlen, NS_BIT); + set_flow_mode(&desc[idx], flow_mode); + break; + } + case CC_DMA_BUF_MLLI: + { + /* DOUBLE-PASS flow (as default) + * assoc. + iv + data -compact in one table + * if assoclen is ZERO only IV perform + */ + cc_sram_addr_t mlli_addr = areq_ctx->assoc.sram_addr; + u32 mlli_nents = areq_ctx->assoc.mlli_nents; + + if (areq_ctx->is_single_pass) { + if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) { + mlli_addr = areq_ctx->dst.sram_addr; + mlli_nents = areq_ctx->dst.mlli_nents; + } else { + mlli_addr = areq_ctx->src.sram_addr; + mlli_nents = areq_ctx->src.mlli_nents; + } + } + + dev_dbg(dev, "AUTHENC: SRC/DST buffer type MLLI\n"); + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_MLLI, mlli_addr, mlli_nents, + NS_BIT); + set_flow_mode(&desc[idx], flow_mode); + break; + } + case CC_DMA_BUF_NULL: + default: + dev_err(dev, "AUTHENC: Invalid SRC/DST buffer type\n"); + } + + *seq_size = (++idx); +} + +static void cc_proc_cipher_desc(struct aead_request *areq, + unsigned int flow_mode, + struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + unsigned int idx = *seq_size; + struct aead_req_ctx *areq_ctx = aead_request_ctx(areq); + enum cc_req_dma_buf_type data_dma_type = areq_ctx->data_buff_type; + struct crypto_aead *tfm = crypto_aead_reqtfm(areq); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + if (areq_ctx->cryptlen == 0) + return; /*null processing*/ + + switch (data_dma_type) { + case CC_DMA_BUF_DLLI: + dev_dbg(dev, "CIPHER: SRC/DST buffer type DLLI\n"); + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + (sg_dma_address(areq_ctx->src_sgl) + + areq_ctx->src_offset), areq_ctx->cryptlen, + NS_BIT); + set_dout_dlli(&desc[idx], + (sg_dma_address(areq_ctx->dst_sgl) + + areq_ctx->dst_offset), + areq_ctx->cryptlen, NS_BIT, 0); + set_flow_mode(&desc[idx], flow_mode); + break; + case CC_DMA_BUF_MLLI: + dev_dbg(dev, "CIPHER: SRC/DST buffer type MLLI\n"); + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_MLLI, areq_ctx->src.sram_addr, + areq_ctx->src.mlli_nents, NS_BIT); + set_dout_mlli(&desc[idx], areq_ctx->dst.sram_addr, + areq_ctx->dst.mlli_nents, NS_BIT, 0); + set_flow_mode(&desc[idx], flow_mode); + break; + case CC_DMA_BUF_NULL: + default: + dev_err(dev, "CIPHER: Invalid SRC/DST buffer type\n"); + } + + *seq_size = (++idx); +} + +static void cc_proc_digest_desc(struct aead_request *req, + struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + unsigned int idx = *seq_size; + unsigned int hash_mode = (ctx->auth_mode == DRV_HASH_SHA1) ? + DRV_HASH_HW_SHA1 : DRV_HASH_HW_SHA256; + int direct = req_ctx->gen_ctx.op_type; + + /* Get final ICV result */ + if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) { + hw_desc_init(&desc[idx]); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_dout_dlli(&desc[idx], req_ctx->icv_dma_addr, ctx->authsize, + NS_BIT, 1); + set_queue_last_ind(&desc[idx]); + if (ctx->auth_mode == DRV_HASH_XCBC_MAC) { + set_aes_not_hash_mode(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_XCBC_MAC); + } else { + set_cipher_config0(&desc[idx], + HASH_DIGEST_RESULT_LITTLE_ENDIAN); + set_cipher_mode(&desc[idx], hash_mode); + } + } else { /*Decrypt*/ + /* Get ICV out from hardware */ + hw_desc_init(&desc[idx]); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_dout_dlli(&desc[idx], req_ctx->mac_buf_dma_addr, + ctx->authsize, NS_BIT, 1); + set_queue_last_ind(&desc[idx]); + set_cipher_config0(&desc[idx], + HASH_DIGEST_RESULT_LITTLE_ENDIAN); + set_cipher_config1(&desc[idx], HASH_PADDING_DISABLED); + if (ctx->auth_mode == DRV_HASH_XCBC_MAC) { + set_cipher_mode(&desc[idx], DRV_CIPHER_XCBC_MAC); + set_aes_not_hash_mode(&desc[idx]); + } else { + set_cipher_mode(&desc[idx], hash_mode); + } + } + + *seq_size = (++idx); +} + +static void cc_set_cipher_desc(struct aead_request *req, + struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + unsigned int hw_iv_size = req_ctx->hw_iv_size; + unsigned int idx = *seq_size; + int direct = req_ctx->gen_ctx.op_type; + + /* Setup cipher state */ + hw_desc_init(&desc[idx]); + set_cipher_config0(&desc[idx], direct); + set_flow_mode(&desc[idx], ctx->flow_mode); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->gen_ctx.iv_dma_addr, + hw_iv_size, NS_BIT); + if (ctx->cipher_mode == DRV_CIPHER_CTR) + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + else + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + set_cipher_mode(&desc[idx], ctx->cipher_mode); + idx++; + + /* Setup enc. key */ + hw_desc_init(&desc[idx]); + set_cipher_config0(&desc[idx], direct); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + set_flow_mode(&desc[idx], ctx->flow_mode); + if (ctx->flow_mode == S_DIN_to_AES) { + set_din_type(&desc[idx], DMA_DLLI, ctx->enckey_dma_addr, + ((ctx->enc_keylen == 24) ? CC_AES_KEY_SIZE_MAX : + ctx->enc_keylen), NS_BIT); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + } else { + set_din_type(&desc[idx], DMA_DLLI, ctx->enckey_dma_addr, + ctx->enc_keylen, NS_BIT); + set_key_size_des(&desc[idx], ctx->enc_keylen); + } + set_cipher_mode(&desc[idx], ctx->cipher_mode); + idx++; + + *seq_size = idx; +} + +static void cc_proc_cipher(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size, unsigned int data_flow_mode) +{ + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + int direct = req_ctx->gen_ctx.op_type; + unsigned int idx = *seq_size; + + if (req_ctx->cryptlen == 0) + return; /*null processing*/ + + cc_set_cipher_desc(req, desc, &idx); + cc_proc_cipher_desc(req, data_flow_mode, desc, &idx); + if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) { + /* We must wait for DMA to write all cipher */ + hw_desc_init(&desc[idx]); + set_din_no_dma(&desc[idx], 0, 0xfffff0); + set_dout_no_dma(&desc[idx], 0, 0, 1); + idx++; + } + + *seq_size = idx; +} + +static void cc_set_hmac_desc(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + unsigned int hash_mode = (ctx->auth_mode == DRV_HASH_SHA1) ? + DRV_HASH_HW_SHA1 : DRV_HASH_HW_SHA256; + unsigned int digest_size = (ctx->auth_mode == DRV_HASH_SHA1) ? + CC_SHA1_DIGEST_SIZE : CC_SHA256_DIGEST_SIZE; + unsigned int idx = *seq_size; + + /* Loading hash ipad xor key state */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_din_type(&desc[idx], DMA_DLLI, + ctx->auth_state.hmac.ipad_opad_dma_addr, digest_size, + NS_BIT); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + idx++; + + /* Load init. digest len (64 bytes) */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_din_sram(&desc[idx], cc_digest_len_addr(ctx->drvdata, hash_mode), + HASH_LEN_SIZE); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + idx++; + + *seq_size = idx; +} + +static void cc_set_xcbc_desc(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + unsigned int idx = *seq_size; + + /* Loading MAC state */ + hw_desc_init(&desc[idx]); + set_din_const(&desc[idx], 0, CC_AES_BLOCK_SIZE); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + set_cipher_mode(&desc[idx], DRV_CIPHER_XCBC_MAC); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_key_size_aes(&desc[idx], CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + /* Setup XCBC MAC K1 */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + ctx->auth_state.xcbc.xcbc_keys_dma_addr, + AES_KEYSIZE_128, NS_BIT); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + set_cipher_mode(&desc[idx], DRV_CIPHER_XCBC_MAC); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_key_size_aes(&desc[idx], CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + /* Setup XCBC MAC K2 */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + (ctx->auth_state.xcbc.xcbc_keys_dma_addr + + AES_KEYSIZE_128), AES_KEYSIZE_128, NS_BIT); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + set_cipher_mode(&desc[idx], DRV_CIPHER_XCBC_MAC); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_key_size_aes(&desc[idx], CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + /* Setup XCBC MAC K3 */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + (ctx->auth_state.xcbc.xcbc_keys_dma_addr + + 2 * AES_KEYSIZE_128), AES_KEYSIZE_128, NS_BIT); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE2); + set_cipher_mode(&desc[idx], DRV_CIPHER_XCBC_MAC); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_key_size_aes(&desc[idx], CC_AES_128_BIT_KEY_SIZE); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + *seq_size = idx; +} + +static void cc_proc_header_desc(struct aead_request *req, + struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + unsigned int idx = *seq_size; + /* Hash associated data */ + if (req->assoclen > 0) + cc_set_assoc_desc(req, DIN_HASH, desc, &idx); + + /* Hash IV */ + *seq_size = idx; +} + +static void cc_proc_scheme_desc(struct aead_request *req, + struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct cc_aead_handle *aead_handle = ctx->drvdata->aead_handle; + unsigned int hash_mode = (ctx->auth_mode == DRV_HASH_SHA1) ? + DRV_HASH_HW_SHA1 : DRV_HASH_HW_SHA256; + unsigned int digest_size = (ctx->auth_mode == DRV_HASH_SHA1) ? + CC_SHA1_DIGEST_SIZE : CC_SHA256_DIGEST_SIZE; + unsigned int idx = *seq_size; + + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_dout_sram(&desc[idx], aead_handle->sram_workspace_addr, + HASH_LEN_SIZE); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE1); + set_cipher_do(&desc[idx], DO_PAD); + idx++; + + /* Get final ICV result */ + hw_desc_init(&desc[idx]); + set_dout_sram(&desc[idx], aead_handle->sram_workspace_addr, + digest_size); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_cipher_config0(&desc[idx], HASH_DIGEST_RESULT_LITTLE_ENDIAN); + set_cipher_mode(&desc[idx], hash_mode); + idx++; + + /* Loading hash opad xor key state */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_din_type(&desc[idx], DMA_DLLI, + (ctx->auth_state.hmac.ipad_opad_dma_addr + digest_size), + digest_size, NS_BIT); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + idx++; + + /* Load init. digest len (64 bytes) */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], hash_mode); + set_din_sram(&desc[idx], cc_digest_len_addr(ctx->drvdata, hash_mode), + HASH_LEN_SIZE); + set_cipher_config1(&desc[idx], HASH_PADDING_ENABLED); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + idx++; + + /* Perform HASH update */ + hw_desc_init(&desc[idx]); + set_din_sram(&desc[idx], aead_handle->sram_workspace_addr, + digest_size); + set_flow_mode(&desc[idx], DIN_HASH); + idx++; + + *seq_size = idx; +} + +static void cc_mlli_to_sram(struct aead_request *req, + struct cc_hw_desc desc[], unsigned int *seq_size) +{ + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + if (req_ctx->assoc_buff_type == CC_DMA_BUF_MLLI || + req_ctx->data_buff_type == CC_DMA_BUF_MLLI || + !req_ctx->is_single_pass) { + dev_dbg(dev, "Copy-to-sram: mlli_dma=%08x, mlli_size=%u\n", + (unsigned int)ctx->drvdata->mlli_sram_addr, + req_ctx->mlli_params.mlli_len); + /* Copy MLLI table host-to-sram */ + hw_desc_init(&desc[*seq_size]); + set_din_type(&desc[*seq_size], DMA_DLLI, + req_ctx->mlli_params.mlli_dma_addr, + req_ctx->mlli_params.mlli_len, NS_BIT); + set_dout_sram(&desc[*seq_size], + ctx->drvdata->mlli_sram_addr, + req_ctx->mlli_params.mlli_len); + set_flow_mode(&desc[*seq_size], BYPASS); + (*seq_size)++; + } +} + +static enum cc_flow_mode cc_get_data_flow(enum drv_crypto_direction direct, + enum cc_flow_mode setup_flow_mode, + bool is_single_pass) +{ + enum cc_flow_mode data_flow_mode; + + if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) { + if (setup_flow_mode == S_DIN_to_AES) + data_flow_mode = is_single_pass ? + AES_to_HASH_and_DOUT : DIN_AES_DOUT; + else + data_flow_mode = is_single_pass ? + DES_to_HASH_and_DOUT : DIN_DES_DOUT; + } else { /* Decrypt */ + if (setup_flow_mode == S_DIN_to_AES) + data_flow_mode = is_single_pass ? + AES_and_HASH : DIN_AES_DOUT; + else + data_flow_mode = is_single_pass ? + DES_and_HASH : DIN_DES_DOUT; + } + + return data_flow_mode; +} + +static void cc_hmac_authenc(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + int direct = req_ctx->gen_ctx.op_type; + unsigned int data_flow_mode = + cc_get_data_flow(direct, ctx->flow_mode, + req_ctx->is_single_pass); + + if (req_ctx->is_single_pass) { + /** + * Single-pass flow + */ + cc_set_hmac_desc(req, desc, seq_size); + cc_set_cipher_desc(req, desc, seq_size); + cc_proc_header_desc(req, desc, seq_size); + cc_proc_cipher_desc(req, data_flow_mode, desc, seq_size); + cc_proc_scheme_desc(req, desc, seq_size); + cc_proc_digest_desc(req, desc, seq_size); + return; + } + + /** + * Double-pass flow + * Fallback for unsupported single-pass modes, + * i.e. using assoc. data of non-word-multiple + */ + if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) { + /* encrypt first.. */ + cc_proc_cipher(req, desc, seq_size, data_flow_mode); + /* authenc after..*/ + cc_set_hmac_desc(req, desc, seq_size); + cc_proc_authen_desc(req, DIN_HASH, desc, seq_size, direct); + cc_proc_scheme_desc(req, desc, seq_size); + cc_proc_digest_desc(req, desc, seq_size); + + } else { /*DECRYPT*/ + /* authenc first..*/ + cc_set_hmac_desc(req, desc, seq_size); + cc_proc_authen_desc(req, DIN_HASH, desc, seq_size, direct); + cc_proc_scheme_desc(req, desc, seq_size); + /* decrypt after.. */ + cc_proc_cipher(req, desc, seq_size, data_flow_mode); + /* read the digest result with setting the completion bit + * must be after the cipher operation + */ + cc_proc_digest_desc(req, desc, seq_size); + } +} + +static void +cc_xcbc_authenc(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + int direct = req_ctx->gen_ctx.op_type; + unsigned int data_flow_mode = + cc_get_data_flow(direct, ctx->flow_mode, + req_ctx->is_single_pass); + + if (req_ctx->is_single_pass) { + /** + * Single-pass flow + */ + cc_set_xcbc_desc(req, desc, seq_size); + cc_set_cipher_desc(req, desc, seq_size); + cc_proc_header_desc(req, desc, seq_size); + cc_proc_cipher_desc(req, data_flow_mode, desc, seq_size); + cc_proc_digest_desc(req, desc, seq_size); + return; + } + + /** + * Double-pass flow + * Fallback for unsupported single-pass modes, + * i.e. using assoc. data of non-word-multiple + */ + if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) { + /* encrypt first.. */ + cc_proc_cipher(req, desc, seq_size, data_flow_mode); + /* authenc after.. */ + cc_set_xcbc_desc(req, desc, seq_size); + cc_proc_authen_desc(req, DIN_HASH, desc, seq_size, direct); + cc_proc_digest_desc(req, desc, seq_size); + } else { /*DECRYPT*/ + /* authenc first.. */ + cc_set_xcbc_desc(req, desc, seq_size); + cc_proc_authen_desc(req, DIN_HASH, desc, seq_size, direct); + /* decrypt after..*/ + cc_proc_cipher(req, desc, seq_size, data_flow_mode); + /* read the digest result with setting the completion bit + * must be after the cipher operation + */ + cc_proc_digest_desc(req, desc, seq_size); + } +} + +static int validate_data_size(struct cc_aead_ctx *ctx, + enum drv_crypto_direction direct, + struct aead_request *req) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + struct device *dev = drvdata_to_dev(ctx->drvdata); + unsigned int assoclen = req->assoclen; + unsigned int cipherlen = (direct == DRV_CRYPTO_DIRECTION_DECRYPT) ? + (req->cryptlen - ctx->authsize) : req->cryptlen; + + if (direct == DRV_CRYPTO_DIRECTION_DECRYPT && + req->cryptlen < ctx->authsize) + goto data_size_err; + + areq_ctx->is_single_pass = true; /*defaulted to fast flow*/ + + switch (ctx->flow_mode) { + case S_DIN_to_AES: + if (ctx->cipher_mode == DRV_CIPHER_CBC && + !IS_ALIGNED(cipherlen, AES_BLOCK_SIZE)) + goto data_size_err; + if (ctx->cipher_mode == DRV_CIPHER_CCM) + break; + if (ctx->cipher_mode == DRV_CIPHER_GCTR) { + if (areq_ctx->plaintext_authenticate_only) + areq_ctx->is_single_pass = false; + break; + } + + if (!IS_ALIGNED(assoclen, sizeof(u32))) + areq_ctx->is_single_pass = false; + + if (ctx->cipher_mode == DRV_CIPHER_CTR && + !IS_ALIGNED(cipherlen, sizeof(u32))) + areq_ctx->is_single_pass = false; + + break; + case S_DIN_to_DES: + if (!IS_ALIGNED(cipherlen, DES_BLOCK_SIZE)) + goto data_size_err; + if (!IS_ALIGNED(assoclen, DES_BLOCK_SIZE)) + areq_ctx->is_single_pass = false; + break; + default: + dev_err(dev, "Unexpected flow mode (%d)\n", ctx->flow_mode); + goto data_size_err; + } + + return 0; + +data_size_err: + return -EINVAL; +} + +static unsigned int format_ccm_a0(u8 *pa0_buff, u32 header_size) +{ + unsigned int len = 0; + + if (header_size == 0) + return 0; + + if (header_size < ((1UL << 16) - (1UL << 8))) { + len = 2; + + pa0_buff[0] = (header_size >> 8) & 0xFF; + pa0_buff[1] = header_size & 0xFF; + } else { + len = 6; + + pa0_buff[0] = 0xFF; + pa0_buff[1] = 0xFE; + pa0_buff[2] = (header_size >> 24) & 0xFF; + pa0_buff[3] = (header_size >> 16) & 0xFF; + pa0_buff[4] = (header_size >> 8) & 0xFF; + pa0_buff[5] = header_size & 0xFF; + } + + return len; +} + +static int set_msg_len(u8 *block, unsigned int msglen, unsigned int csize) +{ + __be32 data; + + memset(block, 0, csize); + block += csize; + + if (csize >= 4) + csize = 4; + else if (msglen > (1 << (8 * csize))) + return -EOVERFLOW; + + data = cpu_to_be32(msglen); + memcpy(block - csize, (u8 *)&data + 4 - csize, csize); + + return 0; +} + +static int cc_ccm(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + unsigned int idx = *seq_size; + unsigned int cipher_flow_mode; + dma_addr_t mac_result; + + if (req_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) { + cipher_flow_mode = AES_to_HASH_and_DOUT; + mac_result = req_ctx->mac_buf_dma_addr; + } else { /* Encrypt */ + cipher_flow_mode = AES_and_HASH; + mac_result = req_ctx->icv_dma_addr; + } + + /* load key */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_CTR); + set_din_type(&desc[idx], DMA_DLLI, ctx->enckey_dma_addr, + ((ctx->enc_keylen == 24) ? CC_AES_KEY_SIZE_MAX : + ctx->enc_keylen), NS_BIT); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + + /* load ctr state */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_CTR); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_din_type(&desc[idx], DMA_DLLI, + req_ctx->gen_ctx.iv_dma_addr, AES_BLOCK_SIZE, NS_BIT); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + + /* load MAC key */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_CBC_MAC); + set_din_type(&desc[idx], DMA_DLLI, ctx->enckey_dma_addr, + ((ctx->enc_keylen == 24) ? CC_AES_KEY_SIZE_MAX : + ctx->enc_keylen), NS_BIT); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + /* load MAC state */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_CBC_MAC); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->mac_buf_dma_addr, + AES_BLOCK_SIZE, NS_BIT); + set_cipher_config0(&desc[idx], DESC_DIRECTION_ENCRYPT_ENCRYPT); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + /* process assoc data */ + if (req->assoclen > 0) { + cc_set_assoc_desc(req, DIN_HASH, desc, &idx); + } else { + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, + sg_dma_address(&req_ctx->ccm_adata_sg), + AES_BLOCK_SIZE + req_ctx->ccm_hdr_size, NS_BIT); + set_flow_mode(&desc[idx], DIN_HASH); + idx++; + } + + /* process the cipher */ + if (req_ctx->cryptlen) + cc_proc_cipher_desc(req, cipher_flow_mode, desc, &idx); + + /* Read temporal MAC */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_CBC_MAC); + set_dout_dlli(&desc[idx], req_ctx->mac_buf_dma_addr, ctx->authsize, + NS_BIT, 0); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_cipher_config0(&desc[idx], HASH_DIGEST_RESULT_LITTLE_ENDIAN); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_aes_not_hash_mode(&desc[idx]); + idx++; + + /* load AES-CTR state (for last MAC calculation)*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_CTR); + set_cipher_config0(&desc[idx], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->ccm_iv0_dma_addr, + AES_BLOCK_SIZE, NS_BIT); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + + hw_desc_init(&desc[idx]); + set_din_no_dma(&desc[idx], 0, 0xfffff0); + set_dout_no_dma(&desc[idx], 0, 0, 1); + idx++; + + /* encrypt the "T" value and store MAC in mac_state */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->mac_buf_dma_addr, + ctx->authsize, NS_BIT); + set_dout_dlli(&desc[idx], mac_result, ctx->authsize, NS_BIT, 1); + set_queue_last_ind(&desc[idx]); + set_flow_mode(&desc[idx], DIN_AES_DOUT); + idx++; + + *seq_size = idx; + return 0; +} + +static int config_ccm_adata(struct aead_request *req) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + //unsigned int size_of_a = 0, rem_a_size = 0; + unsigned int lp = req->iv[0]; + /* Note: The code assume that req->iv[0] already contains the value + * of L' of RFC3610 + */ + unsigned int l = lp + 1; /* This is L' of RFC 3610. */ + unsigned int m = ctx->authsize; /* This is M' of RFC 3610. */ + u8 *b0 = req_ctx->ccm_config + CCM_B0_OFFSET; + u8 *a0 = req_ctx->ccm_config + CCM_A0_OFFSET; + u8 *ctr_count_0 = req_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET; + unsigned int cryptlen = (req_ctx->gen_ctx.op_type == + DRV_CRYPTO_DIRECTION_ENCRYPT) ? + req->cryptlen : + (req->cryptlen - ctx->authsize); + int rc; + + memset(req_ctx->mac_buf, 0, AES_BLOCK_SIZE); + memset(req_ctx->ccm_config, 0, AES_BLOCK_SIZE * 3); + + /* taken from crypto/ccm.c */ + /* 2 <= L <= 8, so 1 <= L' <= 7. */ + if (l < 2 || l > 8) { + dev_err(dev, "illegal iv value %X\n", req->iv[0]); + return -EINVAL; + } + memcpy(b0, req->iv, AES_BLOCK_SIZE); + + /* format control info per RFC 3610 and + * NIST Special Publication 800-38C + */ + *b0 |= (8 * ((m - 2) / 2)); + if (req->assoclen > 0) + *b0 |= 64; /* Enable bit 6 if Adata exists. */ + + rc = set_msg_len(b0 + 16 - l, cryptlen, l); /* Write L'. */ + if (rc) { + dev_err(dev, "message len overflow detected"); + return rc; + } + /* END of "taken from crypto/ccm.c" */ + + /* l(a) - size of associated data. */ + req_ctx->ccm_hdr_size = format_ccm_a0(a0, req->assoclen); + + memset(req->iv + 15 - req->iv[0], 0, req->iv[0] + 1); + req->iv[15] = 1; + + memcpy(ctr_count_0, req->iv, AES_BLOCK_SIZE); + ctr_count_0[15] = 0; + + return 0; +} + +static void cc_proc_rfc4309_ccm(struct aead_request *req) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + + /* L' */ + memset(areq_ctx->ctr_iv, 0, AES_BLOCK_SIZE); + /* For RFC 4309, always use 4 bytes for message length + * (at most 2^32-1 bytes). + */ + areq_ctx->ctr_iv[0] = 3; + + /* In RFC 4309 there is an 11-bytes nonce+IV part, + * that we build here. + */ + memcpy(areq_ctx->ctr_iv + CCM_BLOCK_NONCE_OFFSET, ctx->ctr_nonce, + CCM_BLOCK_NONCE_SIZE); + memcpy(areq_ctx->ctr_iv + CCM_BLOCK_IV_OFFSET, req->iv, + CCM_BLOCK_IV_SIZE); + req->iv = areq_ctx->ctr_iv; + req->assoclen -= CCM_BLOCK_IV_SIZE; +} + +static void cc_set_ghash_desc(struct aead_request *req, + struct cc_hw_desc desc[], unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + unsigned int idx = *seq_size; + + /* load key to AES*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_ECB); + set_cipher_config0(&desc[idx], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_din_type(&desc[idx], DMA_DLLI, ctx->enckey_dma_addr, + ctx->enc_keylen, NS_BIT); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + + /* process one zero block to generate hkey */ + hw_desc_init(&desc[idx]); + set_din_const(&desc[idx], 0x0, AES_BLOCK_SIZE); + set_dout_dlli(&desc[idx], req_ctx->hkey_dma_addr, AES_BLOCK_SIZE, + NS_BIT, 0); + set_flow_mode(&desc[idx], DIN_AES_DOUT); + idx++; + + /* Memory Barrier */ + hw_desc_init(&desc[idx]); + set_din_no_dma(&desc[idx], 0, 0xfffff0); + set_dout_no_dma(&desc[idx], 0, 0, 1); + idx++; + + /* Load GHASH subkey */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->hkey_dma_addr, + AES_BLOCK_SIZE, NS_BIT); + set_dout_no_dma(&desc[idx], 0, 0, 1); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_HASH_HW_GHASH); + set_cipher_config1(&desc[idx], HASH_PADDING_ENABLED); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + idx++; + + /* Configure Hash Engine to work with GHASH. + * Since it was not possible to extend HASH submodes to add GHASH, + * The following command is necessary in order to + * select GHASH (according to HW designers) + */ + hw_desc_init(&desc[idx]); + set_din_no_dma(&desc[idx], 0, 0xfffff0); + set_dout_no_dma(&desc[idx], 0, 0, 1); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_HASH_HW_GHASH); + set_cipher_do(&desc[idx], 1); //1=AES_SK RKEK + set_cipher_config0(&desc[idx], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_cipher_config1(&desc[idx], HASH_PADDING_ENABLED); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + idx++; + + /* Load GHASH initial STATE (which is 0). (for any hash there is an + * initial state) + */ + hw_desc_init(&desc[idx]); + set_din_const(&desc[idx], 0x0, AES_BLOCK_SIZE); + set_dout_no_dma(&desc[idx], 0, 0, 1); + set_flow_mode(&desc[idx], S_DIN_to_HASH); + set_aes_not_hash_mode(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_HASH_HW_GHASH); + set_cipher_config1(&desc[idx], HASH_PADDING_ENABLED); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE0); + idx++; + + *seq_size = idx; +} + +static void cc_set_gctr_desc(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + unsigned int idx = *seq_size; + + /* load key to AES*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_GCTR); + set_cipher_config0(&desc[idx], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_din_type(&desc[idx], DMA_DLLI, ctx->enckey_dma_addr, + ctx->enc_keylen, NS_BIT); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_setup_mode(&desc[idx], SETUP_LOAD_KEY0); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + + if (req_ctx->cryptlen && !req_ctx->plaintext_authenticate_only) { + /* load AES/CTR initial CTR value inc by 2*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_GCTR); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_din_type(&desc[idx], DMA_DLLI, + req_ctx->gcm_iv_inc2_dma_addr, AES_BLOCK_SIZE, + NS_BIT); + set_cipher_config0(&desc[idx], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + } + + *seq_size = idx; +} + +static void cc_proc_gcm_result(struct aead_request *req, + struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + dma_addr_t mac_result; + unsigned int idx = *seq_size; + + if (req_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) { + mac_result = req_ctx->mac_buf_dma_addr; + } else { /* Encrypt */ + mac_result = req_ctx->icv_dma_addr; + } + + /* process(ghash) gcm_block_len */ + hw_desc_init(&desc[idx]); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->gcm_block_len_dma_addr, + AES_BLOCK_SIZE, NS_BIT); + set_flow_mode(&desc[idx], DIN_HASH); + idx++; + + /* Store GHASH state after GHASH(Associated Data + Cipher +LenBlock) */ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_HASH_HW_GHASH); + set_din_no_dma(&desc[idx], 0, 0xfffff0); + set_dout_dlli(&desc[idx], req_ctx->mac_buf_dma_addr, AES_BLOCK_SIZE, + NS_BIT, 0); + set_setup_mode(&desc[idx], SETUP_WRITE_STATE0); + set_flow_mode(&desc[idx], S_HASH_to_DOUT); + set_aes_not_hash_mode(&desc[idx]); + + idx++; + + /* load AES/CTR initial CTR value inc by 1*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_GCTR); + set_key_size_aes(&desc[idx], ctx->enc_keylen); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->gcm_iv_inc1_dma_addr, + AES_BLOCK_SIZE, NS_BIT); + set_cipher_config0(&desc[idx], DRV_CRYPTO_DIRECTION_ENCRYPT); + set_setup_mode(&desc[idx], SETUP_LOAD_STATE1); + set_flow_mode(&desc[idx], S_DIN_to_AES); + idx++; + + /* Memory Barrier */ + hw_desc_init(&desc[idx]); + set_din_no_dma(&desc[idx], 0, 0xfffff0); + set_dout_no_dma(&desc[idx], 0, 0, 1); + idx++; + + /* process GCTR on stored GHASH and store MAC in mac_state*/ + hw_desc_init(&desc[idx]); + set_cipher_mode(&desc[idx], DRV_CIPHER_GCTR); + set_din_type(&desc[idx], DMA_DLLI, req_ctx->mac_buf_dma_addr, + AES_BLOCK_SIZE, NS_BIT); + set_dout_dlli(&desc[idx], mac_result, ctx->authsize, NS_BIT, 1); + set_queue_last_ind(&desc[idx]); + set_flow_mode(&desc[idx], DIN_AES_DOUT); + idx++; + + *seq_size = idx; +} + +static int cc_gcm(struct aead_request *req, struct cc_hw_desc desc[], + unsigned int *seq_size) +{ + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + unsigned int cipher_flow_mode; + + if (req_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) { + cipher_flow_mode = AES_and_HASH; + } else { /* Encrypt */ + cipher_flow_mode = AES_to_HASH_and_DOUT; + } + + //in RFC4543 no data to encrypt. just copy data from src to dest. + if (req_ctx->plaintext_authenticate_only) { + cc_proc_cipher_desc(req, BYPASS, desc, seq_size); + cc_set_ghash_desc(req, desc, seq_size); + /* process(ghash) assoc data */ + cc_set_assoc_desc(req, DIN_HASH, desc, seq_size); + cc_set_gctr_desc(req, desc, seq_size); + cc_proc_gcm_result(req, desc, seq_size); + return 0; + } + + // for gcm and rfc4106. + cc_set_ghash_desc(req, desc, seq_size); + /* process(ghash) assoc data */ + if (req->assoclen > 0) + cc_set_assoc_desc(req, DIN_HASH, desc, seq_size); + cc_set_gctr_desc(req, desc, seq_size); + /* process(gctr+ghash) */ + if (req_ctx->cryptlen) + cc_proc_cipher_desc(req, cipher_flow_mode, desc, seq_size); + cc_proc_gcm_result(req, desc, seq_size); + + return 0; +} + +static int config_gcm_context(struct aead_request *req) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *req_ctx = aead_request_ctx(req); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + unsigned int cryptlen = (req_ctx->gen_ctx.op_type == + DRV_CRYPTO_DIRECTION_ENCRYPT) ? + req->cryptlen : + (req->cryptlen - ctx->authsize); + __be32 counter = cpu_to_be32(2); + + dev_dbg(dev, "%s() cryptlen = %d, req->assoclen = %d ctx->authsize = %d\n", + __func__, cryptlen, req->assoclen, ctx->authsize); + + memset(req_ctx->hkey, 0, AES_BLOCK_SIZE); + + memset(req_ctx->mac_buf, 0, AES_BLOCK_SIZE); + + memcpy(req->iv + 12, &counter, 4); + memcpy(req_ctx->gcm_iv_inc2, req->iv, 16); + + counter = cpu_to_be32(1); + memcpy(req->iv + 12, &counter, 4); + memcpy(req_ctx->gcm_iv_inc1, req->iv, 16); + + if (!req_ctx->plaintext_authenticate_only) { + __be64 temp64; + + temp64 = cpu_to_be64(req->assoclen * 8); + memcpy(&req_ctx->gcm_len_block.len_a, &temp64, sizeof(temp64)); + temp64 = cpu_to_be64(cryptlen * 8); + memcpy(&req_ctx->gcm_len_block.len_c, &temp64, 8); + } else { + /* rfc4543=> all data(AAD,IV,Plain) are considered additional + * data that is nothing is encrypted. + */ + __be64 temp64; + + temp64 = cpu_to_be64((req->assoclen + GCM_BLOCK_RFC4_IV_SIZE + + cryptlen) * 8); + memcpy(&req_ctx->gcm_len_block.len_a, &temp64, sizeof(temp64)); + temp64 = 0; + memcpy(&req_ctx->gcm_len_block.len_c, &temp64, 8); + } + + return 0; +} + +static void cc_proc_rfc4_gcm(struct aead_request *req) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + + memcpy(areq_ctx->ctr_iv + GCM_BLOCK_RFC4_NONCE_OFFSET, + ctx->ctr_nonce, GCM_BLOCK_RFC4_NONCE_SIZE); + memcpy(areq_ctx->ctr_iv + GCM_BLOCK_RFC4_IV_OFFSET, req->iv, + GCM_BLOCK_RFC4_IV_SIZE); + req->iv = areq_ctx->ctr_iv; + req->assoclen -= GCM_BLOCK_RFC4_IV_SIZE; +} + +static int cc_proc_aead(struct aead_request *req, + enum drv_crypto_direction direct) +{ + int rc = 0; + int seq_len = 0; + struct cc_hw_desc desc[MAX_AEAD_PROCESS_SEQ]; + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + struct device *dev = drvdata_to_dev(ctx->drvdata); + struct cc_crypto_req cc_req = {}; + + dev_dbg(dev, "%s context=%p req=%p iv=%p src=%p src_ofs=%d dst=%p dst_ofs=%d cryptolen=%d\n", + ((direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ? "Enc" : "Dec"), + ctx, req, req->iv, sg_virt(req->src), req->src->offset, + sg_virt(req->dst), req->dst->offset, req->cryptlen); + + /* STAT_PHASE_0: Init and sanity checks */ + + /* Check data length according to mode */ + if (validate_data_size(ctx, direct, req)) { + dev_err(dev, "Unsupported crypt/assoc len %d/%d.\n", + req->cryptlen, req->assoclen); + crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_BLOCK_LEN); + return -EINVAL; + } + + /* Setup DX request structure */ + cc_req.user_cb = (void *)cc_aead_complete; + cc_req.user_arg = (void *)req; + + /* Setup request context */ + areq_ctx->gen_ctx.op_type = direct; + areq_ctx->req_authsize = ctx->authsize; + areq_ctx->cipher_mode = ctx->cipher_mode; + + /* STAT_PHASE_1: Map buffers */ + + if (ctx->cipher_mode == DRV_CIPHER_CTR) { + /* Build CTR IV - Copy nonce from last 4 bytes in + * CTR key to first 4 bytes in CTR IV + */ + memcpy(areq_ctx->ctr_iv, ctx->ctr_nonce, + CTR_RFC3686_NONCE_SIZE); + if (!areq_ctx->backup_giv) /*User none-generated IV*/ + memcpy(areq_ctx->ctr_iv + CTR_RFC3686_NONCE_SIZE, + req->iv, CTR_RFC3686_IV_SIZE); + /* Initialize counter portion of counter block */ + *(__be32 *)(areq_ctx->ctr_iv + CTR_RFC3686_NONCE_SIZE + + CTR_RFC3686_IV_SIZE) = cpu_to_be32(1); + + /* Replace with counter iv */ + req->iv = areq_ctx->ctr_iv; + areq_ctx->hw_iv_size = CTR_RFC3686_BLOCK_SIZE; + } else if ((ctx->cipher_mode == DRV_CIPHER_CCM) || + (ctx->cipher_mode == DRV_CIPHER_GCTR)) { + areq_ctx->hw_iv_size = AES_BLOCK_SIZE; + if (areq_ctx->ctr_iv != req->iv) { + memcpy(areq_ctx->ctr_iv, req->iv, + crypto_aead_ivsize(tfm)); + req->iv = areq_ctx->ctr_iv; + } + } else { + areq_ctx->hw_iv_size = crypto_aead_ivsize(tfm); + } + + if (ctx->cipher_mode == DRV_CIPHER_CCM) { + rc = config_ccm_adata(req); + if (rc) { + dev_dbg(dev, "config_ccm_adata() returned with a failure %d!", + rc); + goto exit; + } + } else { + areq_ctx->ccm_hdr_size = ccm_header_size_null; + } + + if (ctx->cipher_mode == DRV_CIPHER_GCTR) { + rc = config_gcm_context(req); + if (rc) { + dev_dbg(dev, "config_gcm_context() returned with a failure %d!", + rc); + goto exit; + } + } + + rc = cc_map_aead_request(ctx->drvdata, req); + if (rc) { + dev_err(dev, "map_request() failed\n"); + goto exit; + } + + /* do we need to generate IV? */ + if (areq_ctx->backup_giv) { + /* set the DMA mapped IV address*/ + if (ctx->cipher_mode == DRV_CIPHER_CTR) { + cc_req.ivgen_dma_addr[0] = + areq_ctx->gen_ctx.iv_dma_addr + + CTR_RFC3686_NONCE_SIZE; + cc_req.ivgen_dma_addr_len = 1; + } else if (ctx->cipher_mode == DRV_CIPHER_CCM) { + /* In ccm, the IV needs to exist both inside B0 and + * inside the counter.It is also copied to iv_dma_addr + * for other reasons (like returning it to the user). + * So, using 3 (identical) IV outputs. + */ + cc_req.ivgen_dma_addr[0] = + areq_ctx->gen_ctx.iv_dma_addr + + CCM_BLOCK_IV_OFFSET; + cc_req.ivgen_dma_addr[1] = + sg_dma_address(&areq_ctx->ccm_adata_sg) + + CCM_B0_OFFSET + CCM_BLOCK_IV_OFFSET; + cc_req.ivgen_dma_addr[2] = + sg_dma_address(&areq_ctx->ccm_adata_sg) + + CCM_CTR_COUNT_0_OFFSET + CCM_BLOCK_IV_OFFSET; + cc_req.ivgen_dma_addr_len = 3; + } else { + cc_req.ivgen_dma_addr[0] = + areq_ctx->gen_ctx.iv_dma_addr; + cc_req.ivgen_dma_addr_len = 1; + } + + /* set the IV size (8/16 B long)*/ + cc_req.ivgen_size = crypto_aead_ivsize(tfm); + } + + /* STAT_PHASE_2: Create sequence */ + + /* Load MLLI tables to SRAM if necessary */ + cc_mlli_to_sram(req, desc, &seq_len); + + /*TODO: move seq len by reference */ + switch (ctx->auth_mode) { + case DRV_HASH_SHA1: + case DRV_HASH_SHA256: + cc_hmac_authenc(req, desc, &seq_len); + break; + case DRV_HASH_XCBC_MAC: + cc_xcbc_authenc(req, desc, &seq_len); + break; + case DRV_HASH_NULL: + if (ctx->cipher_mode == DRV_CIPHER_CCM) + cc_ccm(req, desc, &seq_len); + if (ctx->cipher_mode == DRV_CIPHER_GCTR) + cc_gcm(req, desc, &seq_len); + break; + default: + dev_err(dev, "Unsupported authenc (%d)\n", ctx->auth_mode); + cc_unmap_aead_request(dev, req); + rc = -ENOTSUPP; + goto exit; + } + + /* STAT_PHASE_3: Lock HW and push sequence */ + + rc = cc_send_request(ctx->drvdata, &cc_req, desc, seq_len, &req->base); + + if (rc != -EINPROGRESS && rc != -EBUSY) { + dev_err(dev, "send_request() failed (rc=%d)\n", rc); + cc_unmap_aead_request(dev, req); + } + +exit: + return rc; +} + +static int cc_aead_encrypt(struct aead_request *req) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc; + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + areq_ctx->is_gcm4543 = false; + + areq_ctx->plaintext_authenticate_only = false; + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_ENCRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; + + return rc; +} + +static int cc_rfc4309_ccm_encrypt(struct aead_request *req) +{ + /* Very similar to cc_aead_encrypt() above. */ + + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + int rc = -EINVAL; + + if (!valid_assoclen(req)) { + dev_err(dev, "invalid Assoclen:%u\n", req->assoclen); + goto out; + } + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + areq_ctx->is_gcm4543 = true; + + cc_proc_rfc4309_ccm(req); + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_ENCRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; +out: + return rc; +} + +static int cc_aead_decrypt(struct aead_request *req) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc; + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + areq_ctx->is_gcm4543 = false; + + areq_ctx->plaintext_authenticate_only = false; + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_DECRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; + + return rc; +} + +static int cc_rfc4309_ccm_decrypt(struct aead_request *req) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc = -EINVAL; + + if (!valid_assoclen(req)) { + dev_err(dev, "invalid Assoclen:%u\n", req->assoclen); + goto out; + } + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + + areq_ctx->is_gcm4543 = true; + cc_proc_rfc4309_ccm(req); + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_DECRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; + +out: + return rc; +} + +static int cc_rfc4106_gcm_setkey(struct crypto_aead *tfm, const u8 *key, + unsigned int keylen) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "%s() keylen %d, key %p\n", __func__, keylen, key); + + if (keylen < 4) + return -EINVAL; + + keylen -= 4; + memcpy(ctx->ctr_nonce, key + keylen, 4); + + return cc_aead_setkey(tfm, key, keylen); +} + +static int cc_rfc4543_gcm_setkey(struct crypto_aead *tfm, const u8 *key, + unsigned int keylen) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "%s() keylen %d, key %p\n", __func__, keylen, key); + + if (keylen < 4) + return -EINVAL; + + keylen -= 4; + memcpy(ctx->ctr_nonce, key + keylen, 4); + + return cc_aead_setkey(tfm, key, keylen); +} + +static int cc_gcm_setauthsize(struct crypto_aead *authenc, + unsigned int authsize) +{ + switch (authsize) { + case 4: + case 8: + case 12: + case 13: + case 14: + case 15: + case 16: + break; + default: + return -EINVAL; + } + + return cc_aead_setauthsize(authenc, authsize); +} + +static int cc_rfc4106_gcm_setauthsize(struct crypto_aead *authenc, + unsigned int authsize) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(authenc); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "authsize %d\n", authsize); + + switch (authsize) { + case 8: + case 12: + case 16: + break; + default: + return -EINVAL; + } + + return cc_aead_setauthsize(authenc, authsize); +} + +static int cc_rfc4543_gcm_setauthsize(struct crypto_aead *authenc, + unsigned int authsize) +{ + struct cc_aead_ctx *ctx = crypto_aead_ctx(authenc); + struct device *dev = drvdata_to_dev(ctx->drvdata); + + dev_dbg(dev, "authsize %d\n", authsize); + + if (authsize != 16) + return -EINVAL; + + return cc_aead_setauthsize(authenc, authsize); +} + +static int cc_rfc4106_gcm_encrypt(struct aead_request *req) +{ + /* Very similar to cc_aead_encrypt() above. */ + + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc = -EINVAL; + + if (!valid_assoclen(req)) { + dev_err(dev, "invalid Assoclen:%u\n", req->assoclen); + goto out; + } + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + + areq_ctx->plaintext_authenticate_only = false; + + cc_proc_rfc4_gcm(req); + areq_ctx->is_gcm4543 = true; + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_ENCRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; +out: + return rc; +} + +static int cc_rfc4543_gcm_encrypt(struct aead_request *req) +{ + /* Very similar to cc_aead_encrypt() above. */ + + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc; + + //plaintext is not encryped with rfc4543 + areq_ctx->plaintext_authenticate_only = true; + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + + cc_proc_rfc4_gcm(req); + areq_ctx->is_gcm4543 = true; + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_ENCRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; + + return rc; +} + +static int cc_rfc4106_gcm_decrypt(struct aead_request *req) +{ + /* Very similar to cc_aead_decrypt() above. */ + + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct device *dev = drvdata_to_dev(ctx->drvdata); + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc = -EINVAL; + + if (!valid_assoclen(req)) { + dev_err(dev, "invalid Assoclen:%u\n", req->assoclen); + goto out; + } + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + + areq_ctx->plaintext_authenticate_only = false; + + cc_proc_rfc4_gcm(req); + areq_ctx->is_gcm4543 = true; + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_DECRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; +out: + return rc; +} + +static int cc_rfc4543_gcm_decrypt(struct aead_request *req) +{ + /* Very similar to cc_aead_decrypt() above. */ + + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc; + + //plaintext is not decryped with rfc4543 + areq_ctx->plaintext_authenticate_only = true; + + /* No generated IV required */ + areq_ctx->backup_iv = req->iv; + areq_ctx->backup_giv = NULL; + + cc_proc_rfc4_gcm(req); + areq_ctx->is_gcm4543 = true; + + rc = cc_proc_aead(req, DRV_CRYPTO_DIRECTION_DECRYPT); + if (rc != -EINPROGRESS && rc != -EBUSY) + req->iv = areq_ctx->backup_iv; + + return rc; +} + +/* DX Block aead alg */ +static struct cc_alg_template aead_algs[] = { + { + .name = "authenc(hmac(sha1),cbc(aes))", + .driver_name = "authenc-hmac-sha1-cbc-aes-dx", + .blocksize = AES_BLOCK_SIZE, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = AES_BLOCK_SIZE, + .maxauthsize = SHA1_DIGEST_SIZE, + }, + .cipher_mode = DRV_CIPHER_CBC, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_SHA1, + }, + { + .name = "authenc(hmac(sha1),cbc(des3_ede))", + .driver_name = "authenc-hmac-sha1-cbc-des3-dx", + .blocksize = DES3_EDE_BLOCK_SIZE, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = DES3_EDE_BLOCK_SIZE, + .maxauthsize = SHA1_DIGEST_SIZE, + }, + .cipher_mode = DRV_CIPHER_CBC, + .flow_mode = S_DIN_to_DES, + .auth_mode = DRV_HASH_SHA1, + }, + { + .name = "authenc(hmac(sha256),cbc(aes))", + .driver_name = "authenc-hmac-sha256-cbc-aes-dx", + .blocksize = AES_BLOCK_SIZE, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = AES_BLOCK_SIZE, + .maxauthsize = SHA256_DIGEST_SIZE, + }, + .cipher_mode = DRV_CIPHER_CBC, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_SHA256, + }, + { + .name = "authenc(hmac(sha256),cbc(des3_ede))", + .driver_name = "authenc-hmac-sha256-cbc-des3-dx", + .blocksize = DES3_EDE_BLOCK_SIZE, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = DES3_EDE_BLOCK_SIZE, + .maxauthsize = SHA256_DIGEST_SIZE, + }, + .cipher_mode = DRV_CIPHER_CBC, + .flow_mode = S_DIN_to_DES, + .auth_mode = DRV_HASH_SHA256, + }, + { + .name = "authenc(xcbc(aes),cbc(aes))", + .driver_name = "authenc-xcbc-aes-cbc-aes-dx", + .blocksize = AES_BLOCK_SIZE, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = AES_BLOCK_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_CBC, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_XCBC_MAC, + }, + { + .name = "authenc(hmac(sha1),rfc3686(ctr(aes)))", + .driver_name = "authenc-hmac-sha1-rfc3686-ctr-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = CTR_RFC3686_IV_SIZE, + .maxauthsize = SHA1_DIGEST_SIZE, + }, + .cipher_mode = DRV_CIPHER_CTR, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_SHA1, + }, + { + .name = "authenc(hmac(sha256),rfc3686(ctr(aes)))", + .driver_name = "authenc-hmac-sha256-rfc3686-ctr-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = CTR_RFC3686_IV_SIZE, + .maxauthsize = SHA256_DIGEST_SIZE, + }, + .cipher_mode = DRV_CIPHER_CTR, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_SHA256, + }, + { + .name = "authenc(xcbc(aes),rfc3686(ctr(aes)))", + .driver_name = "authenc-xcbc-aes-rfc3686-ctr-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_aead_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = CTR_RFC3686_IV_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_CTR, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_XCBC_MAC, + }, + { + .name = "ccm(aes)", + .driver_name = "ccm-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_ccm_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = AES_BLOCK_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_CCM, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_NULL, + }, + { + .name = "rfc4309(ccm(aes))", + .driver_name = "rfc4309-ccm-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_rfc4309_ccm_setkey, + .setauthsize = cc_rfc4309_ccm_setauthsize, + .encrypt = cc_rfc4309_ccm_encrypt, + .decrypt = cc_rfc4309_ccm_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = CCM_BLOCK_IV_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_CCM, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_NULL, + }, + { + .name = "gcm(aes)", + .driver_name = "gcm-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_aead_setkey, + .setauthsize = cc_gcm_setauthsize, + .encrypt = cc_aead_encrypt, + .decrypt = cc_aead_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = 12, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_GCTR, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_NULL, + }, + { + .name = "rfc4106(gcm(aes))", + .driver_name = "rfc4106-gcm-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_rfc4106_gcm_setkey, + .setauthsize = cc_rfc4106_gcm_setauthsize, + .encrypt = cc_rfc4106_gcm_encrypt, + .decrypt = cc_rfc4106_gcm_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = GCM_BLOCK_RFC4_IV_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_GCTR, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_NULL, + }, + { + .name = "rfc4543(gcm(aes))", + .driver_name = "rfc4543-gcm-aes-dx", + .blocksize = 1, + .type = CRYPTO_ALG_TYPE_AEAD, + .template_aead = { + .setkey = cc_rfc4543_gcm_setkey, + .setauthsize = cc_rfc4543_gcm_setauthsize, + .encrypt = cc_rfc4543_gcm_encrypt, + .decrypt = cc_rfc4543_gcm_decrypt, + .init = cc_aead_init, + .exit = cc_aead_exit, + .ivsize = GCM_BLOCK_RFC4_IV_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + .cipher_mode = DRV_CIPHER_GCTR, + .flow_mode = S_DIN_to_AES, + .auth_mode = DRV_HASH_NULL, + }, +}; + +static struct cc_crypto_alg *cc_create_aead_alg(struct cc_alg_template *tmpl, + struct device *dev) +{ + struct cc_crypto_alg *t_alg; + struct aead_alg *alg; + + t_alg = kzalloc(sizeof(*t_alg), GFP_KERNEL); + if (!t_alg) + return ERR_PTR(-ENOMEM); + + alg = &tmpl->template_aead; + + snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", + tmpl->name); + snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s", + tmpl->driver_name); + alg->base.cra_module = THIS_MODULE; + alg->base.cra_priority = CC_CRA_PRIO; + + alg->base.cra_ctxsize = sizeof(struct cc_aead_ctx); + alg->base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY | + tmpl->type; + alg->init = cc_aead_init; + alg->exit = cc_aead_exit; + + t_alg->aead_alg = *alg; + + t_alg->cipher_mode = tmpl->cipher_mode; + t_alg->flow_mode = tmpl->flow_mode; + t_alg->auth_mode = tmpl->auth_mode; + + return t_alg; +} + +int cc_aead_free(struct cc_drvdata *drvdata) +{ + struct cc_crypto_alg *t_alg, *n; + struct cc_aead_handle *aead_handle = + (struct cc_aead_handle *)drvdata->aead_handle; + + if (aead_handle) { + /* Remove registered algs */ + list_for_each_entry_safe(t_alg, n, &aead_handle->aead_list, + entry) { + crypto_unregister_aead(&t_alg->aead_alg); + list_del(&t_alg->entry); + kfree(t_alg); + } + kfree(aead_handle); + drvdata->aead_handle = NULL; + } + + return 0; +} + +int cc_aead_alloc(struct cc_drvdata *drvdata) +{ + struct cc_aead_handle *aead_handle; + struct cc_crypto_alg *t_alg; + int rc = -ENOMEM; + int alg; + struct device *dev = drvdata_to_dev(drvdata); + + aead_handle = kmalloc(sizeof(*aead_handle), GFP_KERNEL); + if (!aead_handle) { + rc = -ENOMEM; + goto fail0; + } + + INIT_LIST_HEAD(&aead_handle->aead_list); + drvdata->aead_handle = aead_handle; + + aead_handle->sram_workspace_addr = cc_sram_alloc(drvdata, + MAX_HMAC_DIGEST_SIZE); + + if (aead_handle->sram_workspace_addr == NULL_SRAM_ADDR) { + dev_err(dev, "SRAM pool exhausted\n"); + rc = -ENOMEM; + goto fail1; + } + + /* Linux crypto */ + for (alg = 0; alg < ARRAY_SIZE(aead_algs); alg++) { + t_alg = cc_create_aead_alg(&aead_algs[alg], dev); + if (IS_ERR(t_alg)) { + rc = PTR_ERR(t_alg); + dev_err(dev, "%s alg allocation failed\n", + aead_algs[alg].driver_name); + goto fail1; + } + t_alg->drvdata = drvdata; + rc = crypto_register_aead(&t_alg->aead_alg); + if (rc) { + dev_err(dev, "%s alg registration failed\n", + t_alg->aead_alg.base.cra_driver_name); + goto fail2; + } else { + list_add_tail(&t_alg->entry, &aead_handle->aead_list); + dev_dbg(dev, "Registered %s\n", + t_alg->aead_alg.base.cra_driver_name); + } + } + + return 0; + +fail2: + kfree(t_alg); +fail1: + cc_aead_free(drvdata); +fail0: + return rc; +} diff --git a/drivers/crypto/ccree/cc_aead.h b/drivers/crypto/ccree/cc_aead.h new file mode 100644 index 0000000..5edf3b3 --- /dev/null +++ b/drivers/crypto/ccree/cc_aead.h @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ + +/* \file cc_aead.h + * ARM CryptoCell AEAD Crypto API + */ + +#ifndef __CC_AEAD_H__ +#define __CC_AEAD_H__ + +#include <linux/kernel.h> +#include <crypto/algapi.h> +#include <crypto/ctr.h> + +/* mac_cmp - HW writes 8 B but all bytes hold the same value */ +#define ICV_CMP_SIZE 8 +#define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3) +#define MAX_MAC_SIZE SHA256_DIGEST_SIZE + +/* defines for AES GCM configuration buffer */ +#define GCM_BLOCK_LEN_SIZE 8 + +#define GCM_BLOCK_RFC4_IV_OFFSET 4 +#define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */ +#define GCM_BLOCK_RFC4_NONCE_OFFSET 0 +#define GCM_BLOCK_RFC4_NONCE_SIZE 4 + +/* Offsets into AES CCM configuration buffer */ +#define CCM_B0_OFFSET 0 +#define CCM_A0_OFFSET 16 +#define CCM_CTR_COUNT_0_OFFSET 32 +/* CCM B0 and CTR_COUNT constants. */ +#define CCM_BLOCK_NONCE_OFFSET 1 /* Nonce offset inside B0 and CTR_COUNT */ +#define CCM_BLOCK_NONCE_SIZE 3 /* Nonce size inside B0 and CTR_COUNT */ +#define CCM_BLOCK_IV_OFFSET 4 /* IV offset inside B0 and CTR_COUNT */ +#define CCM_BLOCK_IV_SIZE 8 /* IV size inside B0 and CTR_COUNT */ + +enum aead_ccm_header_size { + ccm_header_size_null = -1, + ccm_header_size_zero = 0, + ccm_header_size_2 = 2, + ccm_header_size_6 = 6, + ccm_header_size_max = S32_MAX +}; + +struct aead_req_ctx { + /* Allocate cache line although only 4 bytes are needed to + * assure next field falls @ cache line + * Used for both: digest HW compare and CCM/GCM MAC value + */ + u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned; + u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned; + + //used in gcm + u8 gcm_iv_inc1[AES_BLOCK_SIZE] ____cacheline_aligned; + u8 gcm_iv_inc2[AES_BLOCK_SIZE] ____cacheline_aligned; + u8 hkey[AES_BLOCK_SIZE] ____cacheline_aligned; + struct { + u8 len_a[GCM_BLOCK_LEN_SIZE] ____cacheline_aligned; + u8 len_c[GCM_BLOCK_LEN_SIZE]; + } gcm_len_block; + + u8 ccm_config[CCM_CONFIG_BUF_SIZE] ____cacheline_aligned; + /* HW actual size input */ + unsigned int hw_iv_size ____cacheline_aligned; + /* used to prevent cache coherence problem */ + u8 backup_mac[MAX_MAC_SIZE]; + u8 *backup_iv; /*store iv for generated IV flow*/ + u8 *backup_giv; /*store iv for rfc3686(ctr) flow*/ + dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */ + /* buffer for internal ccm configurations */ + dma_addr_t ccm_iv0_dma_addr; + dma_addr_t icv_dma_addr; /* Phys. address of ICV */ + + //used in gcm + /* buffer for internal gcm configurations */ + dma_addr_t gcm_iv_inc1_dma_addr; + /* buffer for internal gcm configurations */ + dma_addr_t gcm_iv_inc2_dma_addr; + dma_addr_t hkey_dma_addr; /* Phys. address of hkey */ + dma_addr_t gcm_block_len_dma_addr; /* Phys. address of gcm block len */ + bool is_gcm4543; + + u8 *icv_virt_addr; /* Virt. address of ICV */ + struct async_gen_req_ctx gen_ctx; + struct cc_mlli assoc; + struct cc_mlli src; + struct cc_mlli dst; + struct scatterlist *src_sgl; + struct scatterlist *dst_sgl; + unsigned int src_offset; + unsigned int dst_offset; + enum cc_req_dma_buf_type assoc_buff_type; + enum cc_req_dma_buf_type data_buff_type; + struct mlli_params mlli_params; + unsigned int cryptlen; + struct scatterlist ccm_adata_sg; + enum aead_ccm_header_size ccm_hdr_size; + unsigned int req_authsize; + enum drv_cipher_mode cipher_mode; + bool is_icv_fragmented; + bool is_single_pass; + bool plaintext_authenticate_only; //for gcm_rfc4543 +}; + +int cc_aead_alloc(struct cc_drvdata *drvdata); +int cc_aead_free(struct cc_drvdata *drvdata); + +#endif /*__CC_AEAD_H__*/ diff --git a/drivers/crypto/ccree/cc_buffer_mgr.c b/drivers/crypto/ccree/cc_buffer_mgr.c index 1ff379b..14b2eab 100644 --- a/drivers/crypto/ccree/cc_buffer_mgr.c +++ b/drivers/crypto/ccree/cc_buffer_mgr.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ +#include <crypto/internal/aead.h> #include <crypto/authenc.h> #include <crypto/scatterwalk.h> #include <linux/dmapool.h> @@ -10,6 +11,7 @@ #include "cc_lli_defs.h" #include "cc_cipher.h" #include "cc_hash.h" +#include "cc_aead.h" enum dma_buffer_type { DMA_NULL_TYPE = -1, @@ -52,6 +54,27 @@ static inline char *cc_dma_buf_type(enum cc_req_dma_buf_type type) } /** + * cc_copy_mac() - Copy MAC to temporary location + * + * @dev: device object + * @req: aead request object + * @dir: [IN] copy from/to sgl + */ +static void cc_copy_mac(struct device *dev, struct aead_request *req, + enum cc_sg_cpy_direct dir) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + u32 skip = req->assoclen + req->cryptlen; + + if (areq_ctx->is_gcm4543) + skip += crypto_aead_ivsize(tfm); + + cc_copy_sg_portion(dev, areq_ctx->backup_mac, req->src, + (skip - areq_ctx->req_authsize), skip, dir); +} + +/** * cc_get_sgl_nents() - Get scatterlist number of entries. * * @sg_list: SG list @@ -246,6 +269,27 @@ static int cc_generate_mlli(struct device *dev, struct buffer_array *sg_data, return rc; } +static void cc_add_buffer_entry(struct device *dev, + struct buffer_array *sgl_data, + dma_addr_t buffer_dma, unsigned int buffer_len, + bool is_last_entry, u32 *mlli_nents) +{ + unsigned int index = sgl_data->num_of_buffers; + + dev_dbg(dev, "index=%u single_buff=%pad buffer_len=0x%08X is_last=%d\n", + index, &buffer_dma, buffer_len, is_last_entry); + sgl_data->nents[index] = 1; + sgl_data->entry[index].buffer_dma = buffer_dma; + sgl_data->offset[index] = 0; + sgl_data->total_data_len[index] = buffer_len; + sgl_data->type[index] = DMA_BUFF_TYPE; + sgl_data->is_last[index] = is_last_entry; + sgl_data->mlli_nents[index] = mlli_nents; + if (sgl_data->mlli_nents[index]) + *sgl_data->mlli_nents[index] = 0; + sgl_data->num_of_buffers++; +} + static void cc_add_sg_entry(struct device *dev, struct buffer_array *sgl_data, unsigned int nents, struct scatterlist *sgl, unsigned int data_len, unsigned int data_offset, @@ -349,6 +393,33 @@ static int cc_map_sg(struct device *dev, struct scatterlist *sg, return 0; } +static int +cc_set_aead_conf_buf(struct device *dev, struct aead_req_ctx *areq_ctx, + u8 *config_data, struct buffer_array *sg_data, + unsigned int assoclen) +{ + dev_dbg(dev, " handle additional data config set to DLLI\n"); + /* create sg for the current buffer */ + sg_init_one(&areq_ctx->ccm_adata_sg, config_data, + AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size); + if (dma_map_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE) != 1) { + dev_err(dev, "dma_map_sg() config buffer failed\n"); + return -ENOMEM; + } + dev_dbg(dev, "Mapped curr_buff: dma_address=%pad page=%p addr=%pK offset=%u length=%u\n", + &sg_dma_address(&areq_ctx->ccm_adata_sg), + sg_page(&areq_ctx->ccm_adata_sg), + sg_virt(&areq_ctx->ccm_adata_sg), + areq_ctx->ccm_adata_sg.offset, areq_ctx->ccm_adata_sg.length); + /* prepare for case of MLLI */ + if (assoclen > 0) { + cc_add_sg_entry(dev, sg_data, 1, &areq_ctx->ccm_adata_sg, + (AES_BLOCK_SIZE + areq_ctx->ccm_hdr_size), + 0, false, NULL); + } + return 0; +} + static int cc_set_hash_buf(struct device *dev, struct ahash_req_ctx *areq_ctx, u8 *curr_buff, u32 curr_buff_cnt, struct buffer_array *sg_data) @@ -497,6 +568,817 @@ int cc_map_blkcipher_request(struct cc_drvdata *drvdata, void *ctx, return rc; } +void cc_unmap_aead_request(struct device *dev, struct aead_request *req) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + unsigned int hw_iv_size = areq_ctx->hw_iv_size; + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cc_drvdata *drvdata = dev_get_drvdata(dev); + u32 dummy; + bool chained; + u32 size_to_unmap = 0; + + if (areq_ctx->mac_buf_dma_addr) { + dma_unmap_single(dev, areq_ctx->mac_buf_dma_addr, + MAX_MAC_SIZE, DMA_BIDIRECTIONAL); + } + + if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) { + if (areq_ctx->hkey_dma_addr) { + dma_unmap_single(dev, areq_ctx->hkey_dma_addr, + AES_BLOCK_SIZE, DMA_BIDIRECTIONAL); + } + + if (areq_ctx->gcm_block_len_dma_addr) { + dma_unmap_single(dev, areq_ctx->gcm_block_len_dma_addr, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + } + + if (areq_ctx->gcm_iv_inc1_dma_addr) { + dma_unmap_single(dev, areq_ctx->gcm_iv_inc1_dma_addr, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + } + + if (areq_ctx->gcm_iv_inc2_dma_addr) { + dma_unmap_single(dev, areq_ctx->gcm_iv_inc2_dma_addr, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + } + } + + if (areq_ctx->ccm_hdr_size != ccm_header_size_null) { + if (areq_ctx->ccm_iv0_dma_addr) { + dma_unmap_single(dev, areq_ctx->ccm_iv0_dma_addr, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + } + + dma_unmap_sg(dev, &areq_ctx->ccm_adata_sg, 1, DMA_TO_DEVICE); + } + if (areq_ctx->gen_ctx.iv_dma_addr) { + dma_unmap_single(dev, areq_ctx->gen_ctx.iv_dma_addr, + hw_iv_size, DMA_BIDIRECTIONAL); + } + + /*In case a pool was set, a table was + *allocated and should be released + */ + if (areq_ctx->mlli_params.curr_pool) { + dev_dbg(dev, "free MLLI buffer: dma=%pad virt=%pK\n", + &areq_ctx->mlli_params.mlli_dma_addr, + areq_ctx->mlli_params.mlli_virt_addr); + dma_pool_free(areq_ctx->mlli_params.curr_pool, + areq_ctx->mlli_params.mlli_virt_addr, + areq_ctx->mlli_params.mlli_dma_addr); + } + + dev_dbg(dev, "Unmapping src sgl: req->src=%pK areq_ctx->src.nents=%u areq_ctx->assoc.nents=%u assoclen:%u cryptlen=%u\n", + sg_virt(req->src), areq_ctx->src.nents, areq_ctx->assoc.nents, + req->assoclen, req->cryptlen); + size_to_unmap = req->assoclen + req->cryptlen; + if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT) + size_to_unmap += areq_ctx->req_authsize; + if (areq_ctx->is_gcm4543) + size_to_unmap += crypto_aead_ivsize(tfm); + + dma_unmap_sg(dev, req->src, + cc_get_sgl_nents(dev, req->src, size_to_unmap, + &dummy, &chained), + DMA_BIDIRECTIONAL); + if (req->src != req->dst) { + dev_dbg(dev, "Unmapping dst sgl: req->dst=%pK\n", + sg_virt(req->dst)); + dma_unmap_sg(dev, req->dst, + cc_get_sgl_nents(dev, req->dst, size_to_unmap, + &dummy, &chained), + DMA_BIDIRECTIONAL); + } + if (drvdata->coherent && + areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT && + req->src == req->dst) { + /* copy back mac from temporary location to deal with possible + * data memory overriding that caused by cache coherence + * problem. + */ + cc_copy_mac(dev, req, CC_SG_FROM_BUF); + } +} + +static int cc_get_aead_icv_nents(struct device *dev, struct scatterlist *sgl, + unsigned int sgl_nents, unsigned int authsize, + u32 last_entry_data_size, + bool *is_icv_fragmented) +{ + unsigned int icv_max_size = 0; + unsigned int icv_required_size = authsize > last_entry_data_size ? + (authsize - last_entry_data_size) : + authsize; + unsigned int nents; + unsigned int i; + + if (sgl_nents < MAX_ICV_NENTS_SUPPORTED) { + *is_icv_fragmented = false; + return 0; + } + + for (i = 0 ; i < (sgl_nents - MAX_ICV_NENTS_SUPPORTED) ; i++) { + if (!sgl) + break; + sgl = sg_next(sgl); + } + + if (sgl) + icv_max_size = sgl->length; + + if (last_entry_data_size > authsize) { + /* ICV attached to data in last entry (not fragmented!) */ + nents = 0; + *is_icv_fragmented = false; + } else if (last_entry_data_size == authsize) { + /* ICV placed in whole last entry (not fragmented!) */ + nents = 1; + *is_icv_fragmented = false; + } else if (icv_max_size > icv_required_size) { + nents = 1; + *is_icv_fragmented = true; + } else if (icv_max_size == icv_required_size) { + nents = 2; + *is_icv_fragmented = true; + } else { + dev_err(dev, "Unsupported num. of ICV fragments (> %d)\n", + MAX_ICV_NENTS_SUPPORTED); + nents = -1; /*unsupported*/ + } + dev_dbg(dev, "is_frag=%s icv_nents=%u\n", + (*is_icv_fragmented ? "true" : "false"), nents); + + return nents; +} + +static int cc_aead_chain_iv(struct cc_drvdata *drvdata, + struct aead_request *req, + struct buffer_array *sg_data, + bool is_last, bool do_chain) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + unsigned int hw_iv_size = areq_ctx->hw_iv_size; + struct device *dev = drvdata_to_dev(drvdata); + int rc = 0; + + if (!req->iv) { + areq_ctx->gen_ctx.iv_dma_addr = 0; + goto chain_iv_exit; + } + + areq_ctx->gen_ctx.iv_dma_addr = dma_map_single(dev, req->iv, + hw_iv_size, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(dev, areq_ctx->gen_ctx.iv_dma_addr)) { + dev_err(dev, "Mapping iv %u B at va=%pK for DMA failed\n", + hw_iv_size, req->iv); + rc = -ENOMEM; + goto chain_iv_exit; + } + + dev_dbg(dev, "Mapped iv %u B at va=%pK to dma=%pad\n", + hw_iv_size, req->iv, &areq_ctx->gen_ctx.iv_dma_addr); + // TODO: what about CTR?? ask Ron + if (do_chain && areq_ctx->plaintext_authenticate_only) { + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + unsigned int iv_size_to_authenc = crypto_aead_ivsize(tfm); + unsigned int iv_ofs = GCM_BLOCK_RFC4_IV_OFFSET; + /* Chain to given list */ + cc_add_buffer_entry(dev, sg_data, + (areq_ctx->gen_ctx.iv_dma_addr + iv_ofs), + iv_size_to_authenc, is_last, + &areq_ctx->assoc.mlli_nents); + areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI; + } + +chain_iv_exit: + return rc; +} + +static int cc_aead_chain_assoc(struct cc_drvdata *drvdata, + struct aead_request *req, + struct buffer_array *sg_data, + bool is_last, bool do_chain) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + int rc = 0; + u32 mapped_nents = 0; + struct scatterlist *current_sg = req->src; + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + unsigned int sg_index = 0; + u32 size_of_assoc = req->assoclen; + struct device *dev = drvdata_to_dev(drvdata); + + if (areq_ctx->is_gcm4543) + size_of_assoc += crypto_aead_ivsize(tfm); + + if (!sg_data) { + rc = -EINVAL; + goto chain_assoc_exit; + } + + if (req->assoclen == 0) { + areq_ctx->assoc_buff_type = CC_DMA_BUF_NULL; + areq_ctx->assoc.nents = 0; + areq_ctx->assoc.mlli_nents = 0; + dev_dbg(dev, "Chain assoc of length 0: buff_type=%s nents=%u\n", + cc_dma_buf_type(areq_ctx->assoc_buff_type), + areq_ctx->assoc.nents); + goto chain_assoc_exit; + } + + //iterate over the sgl to see how many entries are for associated data + //it is assumed that if we reach here , the sgl is already mapped + sg_index = current_sg->length; + //the first entry in the scatter list contains all the associated data + if (sg_index > size_of_assoc) { + mapped_nents++; + } else { + while (sg_index <= size_of_assoc) { + current_sg = sg_next(current_sg); + /* if have reached the end of the sgl, then this is + * unexpected + */ + if (!current_sg) { + dev_err(dev, "reached end of sg list. unexpected\n"); + return -EINVAL; + } + sg_index += current_sg->length; + mapped_nents++; + } + } + if (mapped_nents > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES) { + dev_err(dev, "Too many fragments. current %d max %d\n", + mapped_nents, LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES); + return -ENOMEM; + } + areq_ctx->assoc.nents = mapped_nents; + + /* in CCM case we have additional entry for + * ccm header configurations + */ + if (areq_ctx->ccm_hdr_size != ccm_header_size_null) { + if ((mapped_nents + 1) > LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES) { + dev_err(dev, "CCM case.Too many fragments. Current %d max %d\n", + (areq_ctx->assoc.nents + 1), + LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES); + rc = -ENOMEM; + goto chain_assoc_exit; + } + } + + if (mapped_nents == 1 && areq_ctx->ccm_hdr_size == ccm_header_size_null) + areq_ctx->assoc_buff_type = CC_DMA_BUF_DLLI; + else + areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI; + + if (do_chain || areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI) { + dev_dbg(dev, "Chain assoc: buff_type=%s nents=%u\n", + cc_dma_buf_type(areq_ctx->assoc_buff_type), + areq_ctx->assoc.nents); + cc_add_sg_entry(dev, sg_data, areq_ctx->assoc.nents, req->src, + req->assoclen, 0, is_last, + &areq_ctx->assoc.mlli_nents); + areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI; + } + +chain_assoc_exit: + return rc; +} + +static void cc_prepare_aead_data_dlli(struct aead_request *req, + u32 *src_last_bytes, u32 *dst_last_bytes) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type; + unsigned int authsize = areq_ctx->req_authsize; + + areq_ctx->is_icv_fragmented = false; + if (req->src == req->dst) { + /*INPLACE*/ + areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) + + (*src_last_bytes - authsize); + areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) + + (*src_last_bytes - authsize); + } else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) { + /*NON-INPLACE and DECRYPT*/ + areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) + + (*src_last_bytes - authsize); + areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) + + (*src_last_bytes - authsize); + } else { + /*NON-INPLACE and ENCRYPT*/ + areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->dst_sgl) + + (*dst_last_bytes - authsize); + areq_ctx->icv_virt_addr = sg_virt(areq_ctx->dst_sgl) + + (*dst_last_bytes - authsize); + } +} + +static int cc_prepare_aead_data_mlli(struct cc_drvdata *drvdata, + struct aead_request *req, + struct buffer_array *sg_data, + u32 *src_last_bytes, u32 *dst_last_bytes, + bool is_last_table) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type; + unsigned int authsize = areq_ctx->req_authsize; + int rc = 0, icv_nents; + struct device *dev = drvdata_to_dev(drvdata); + struct scatterlist *sg; + + if (req->src == req->dst) { + /*INPLACE*/ + cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents, + areq_ctx->src_sgl, areq_ctx->cryptlen, + areq_ctx->src_offset, is_last_table, + &areq_ctx->src.mlli_nents); + + icv_nents = cc_get_aead_icv_nents(dev, areq_ctx->src_sgl, + areq_ctx->src.nents, + authsize, *src_last_bytes, + &areq_ctx->is_icv_fragmented); + if (icv_nents < 0) { + rc = -ENOTSUPP; + goto prepare_data_mlli_exit; + } + + if (areq_ctx->is_icv_fragmented) { + /* Backup happens only when ICV is fragmented, ICV + * verification is made by CPU compare in order to + * simplify MAC verification upon request completion + */ + if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) { + /* In coherent platforms (e.g. ACP) + * already copying ICV for any + * INPLACE-DECRYPT operation, hence + * we must neglect this code. + */ + if (!drvdata->coherent) + cc_copy_mac(dev, req, CC_SG_TO_BUF); + + areq_ctx->icv_virt_addr = areq_ctx->backup_mac; + } else { + areq_ctx->icv_virt_addr = areq_ctx->mac_buf; + areq_ctx->icv_dma_addr = + areq_ctx->mac_buf_dma_addr; + } + } else { /* Contig. ICV */ + sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1]; + /*Should hanlde if the sg is not contig.*/ + areq_ctx->icv_dma_addr = sg_dma_address(sg) + + (*src_last_bytes - authsize); + areq_ctx->icv_virt_addr = sg_virt(sg) + + (*src_last_bytes - authsize); + } + + } else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) { + /*NON-INPLACE and DECRYPT*/ + cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents, + areq_ctx->src_sgl, areq_ctx->cryptlen, + areq_ctx->src_offset, is_last_table, + &areq_ctx->src.mlli_nents); + cc_add_sg_entry(dev, sg_data, areq_ctx->dst.nents, + areq_ctx->dst_sgl, areq_ctx->cryptlen, + areq_ctx->dst_offset, is_last_table, + &areq_ctx->dst.mlli_nents); + + icv_nents = cc_get_aead_icv_nents(dev, areq_ctx->src_sgl, + areq_ctx->src.nents, + authsize, *src_last_bytes, + &areq_ctx->is_icv_fragmented); + if (icv_nents < 0) { + rc = -ENOTSUPP; + goto prepare_data_mlli_exit; + } + + /* Backup happens only when ICV is fragmented, ICV + * verification is made by CPU compare in order to simplify + * MAC verification upon request completion + */ + if (areq_ctx->is_icv_fragmented) { + cc_copy_mac(dev, req, CC_SG_TO_BUF); + areq_ctx->icv_virt_addr = areq_ctx->backup_mac; + + } else { /* Contig. ICV */ + sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1]; + /*Should hanlde if the sg is not contig.*/ + areq_ctx->icv_dma_addr = sg_dma_address(sg) + + (*src_last_bytes - authsize); + areq_ctx->icv_virt_addr = sg_virt(sg) + + (*src_last_bytes - authsize); + } + + } else { + /*NON-INPLACE and ENCRYPT*/ + cc_add_sg_entry(dev, sg_data, areq_ctx->dst.nents, + areq_ctx->dst_sgl, areq_ctx->cryptlen, + areq_ctx->dst_offset, is_last_table, + &areq_ctx->dst.mlli_nents); + cc_add_sg_entry(dev, sg_data, areq_ctx->src.nents, + areq_ctx->src_sgl, areq_ctx->cryptlen, + areq_ctx->src_offset, is_last_table, + &areq_ctx->src.mlli_nents); + + icv_nents = cc_get_aead_icv_nents(dev, areq_ctx->dst_sgl, + areq_ctx->dst.nents, + authsize, *dst_last_bytes, + &areq_ctx->is_icv_fragmented); + if (icv_nents < 0) { + rc = -ENOTSUPP; + goto prepare_data_mlli_exit; + } + + if (!areq_ctx->is_icv_fragmented) { + sg = &areq_ctx->dst_sgl[areq_ctx->dst.nents - 1]; + /* Contig. ICV */ + areq_ctx->icv_dma_addr = sg_dma_address(sg) + + (*dst_last_bytes - authsize); + areq_ctx->icv_virt_addr = sg_virt(sg) + + (*dst_last_bytes - authsize); + } else { + areq_ctx->icv_dma_addr = areq_ctx->mac_buf_dma_addr; + areq_ctx->icv_virt_addr = areq_ctx->mac_buf; + } + } + +prepare_data_mlli_exit: + return rc; +} + +static int cc_aead_chain_data(struct cc_drvdata *drvdata, + struct aead_request *req, + struct buffer_array *sg_data, + bool is_last_table, bool do_chain) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + struct device *dev = drvdata_to_dev(drvdata); + enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type; + unsigned int authsize = areq_ctx->req_authsize; + int src_last_bytes = 0, dst_last_bytes = 0; + int rc = 0; + u32 src_mapped_nents = 0, dst_mapped_nents = 0; + u32 offset = 0; + /* non-inplace mode */ + unsigned int size_for_map = req->assoclen + req->cryptlen; + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + u32 sg_index = 0; + bool chained = false; + bool is_gcm4543 = areq_ctx->is_gcm4543; + u32 size_to_skip = req->assoclen; + + if (is_gcm4543) + size_to_skip += crypto_aead_ivsize(tfm); + + offset = size_to_skip; + + if (!sg_data) + return -EINVAL; + + areq_ctx->src_sgl = req->src; + areq_ctx->dst_sgl = req->dst; + + if (is_gcm4543) + size_for_map += crypto_aead_ivsize(tfm); + + size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ? + authsize : 0; + src_mapped_nents = cc_get_sgl_nents(dev, req->src, size_for_map, + &src_last_bytes, &chained); + sg_index = areq_ctx->src_sgl->length; + //check where the data starts + while (sg_index <= size_to_skip) { + offset -= areq_ctx->src_sgl->length; + areq_ctx->src_sgl = sg_next(areq_ctx->src_sgl); + //if have reached the end of the sgl, then this is unexpected + if (!areq_ctx->src_sgl) { + dev_err(dev, "reached end of sg list. unexpected\n"); + return -EINVAL; + } + sg_index += areq_ctx->src_sgl->length; + src_mapped_nents--; + } + if (src_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES) { + dev_err(dev, "Too many fragments. current %d max %d\n", + src_mapped_nents, LLI_MAX_NUM_OF_DATA_ENTRIES); + return -ENOMEM; + } + + areq_ctx->src.nents = src_mapped_nents; + + areq_ctx->src_offset = offset; + + if (req->src != req->dst) { + size_for_map = req->assoclen + req->cryptlen; + size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ? + authsize : 0; + if (is_gcm4543) + size_for_map += crypto_aead_ivsize(tfm); + + rc = cc_map_sg(dev, req->dst, size_for_map, DMA_BIDIRECTIONAL, + &areq_ctx->dst.nents, + LLI_MAX_NUM_OF_DATA_ENTRIES, &dst_last_bytes, + &dst_mapped_nents); + if (rc) { + rc = -ENOMEM; + goto chain_data_exit; + } + } + + dst_mapped_nents = cc_get_sgl_nents(dev, req->dst, size_for_map, + &dst_last_bytes, &chained); + sg_index = areq_ctx->dst_sgl->length; + offset = size_to_skip; + + //check where the data starts + while (sg_index <= size_to_skip) { + offset -= areq_ctx->dst_sgl->length; + areq_ctx->dst_sgl = sg_next(areq_ctx->dst_sgl); + //if have reached the end of the sgl, then this is unexpected + if (!areq_ctx->dst_sgl) { + dev_err(dev, "reached end of sg list. unexpected\n"); + return -EINVAL; + } + sg_index += areq_ctx->dst_sgl->length; + dst_mapped_nents--; + } + if (dst_mapped_nents > LLI_MAX_NUM_OF_DATA_ENTRIES) { + dev_err(dev, "Too many fragments. current %d max %d\n", + dst_mapped_nents, LLI_MAX_NUM_OF_DATA_ENTRIES); + return -ENOMEM; + } + areq_ctx->dst.nents = dst_mapped_nents; + areq_ctx->dst_offset = offset; + if (src_mapped_nents > 1 || + dst_mapped_nents > 1 || + do_chain) { + areq_ctx->data_buff_type = CC_DMA_BUF_MLLI; + rc = cc_prepare_aead_data_mlli(drvdata, req, sg_data, + &src_last_bytes, + &dst_last_bytes, is_last_table); + } else { + areq_ctx->data_buff_type = CC_DMA_BUF_DLLI; + cc_prepare_aead_data_dlli(req, &src_last_bytes, + &dst_last_bytes); + } + +chain_data_exit: + return rc; +} + +static void cc_update_aead_mlli_nents(struct cc_drvdata *drvdata, + struct aead_request *req) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + u32 curr_mlli_size = 0; + + if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI) { + areq_ctx->assoc.sram_addr = drvdata->mlli_sram_addr; + curr_mlli_size = areq_ctx->assoc.mlli_nents * + LLI_ENTRY_BYTE_SIZE; + } + + if (areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) { + /*Inplace case dst nents equal to src nents*/ + if (req->src == req->dst) { + areq_ctx->dst.mlli_nents = areq_ctx->src.mlli_nents; + areq_ctx->src.sram_addr = drvdata->mlli_sram_addr + + curr_mlli_size; + areq_ctx->dst.sram_addr = areq_ctx->src.sram_addr; + if (!areq_ctx->is_single_pass) + areq_ctx->assoc.mlli_nents += + areq_ctx->src.mlli_nents; + } else { + if (areq_ctx->gen_ctx.op_type == + DRV_CRYPTO_DIRECTION_DECRYPT) { + areq_ctx->src.sram_addr = + drvdata->mlli_sram_addr + + curr_mlli_size; + areq_ctx->dst.sram_addr = + areq_ctx->src.sram_addr + + areq_ctx->src.mlli_nents * + LLI_ENTRY_BYTE_SIZE; + if (!areq_ctx->is_single_pass) + areq_ctx->assoc.mlli_nents += + areq_ctx->src.mlli_nents; + } else { + areq_ctx->dst.sram_addr = + drvdata->mlli_sram_addr + + curr_mlli_size; + areq_ctx->src.sram_addr = + areq_ctx->dst.sram_addr + + areq_ctx->dst.mlli_nents * + LLI_ENTRY_BYTE_SIZE; + if (!areq_ctx->is_single_pass) + areq_ctx->assoc.mlli_nents += + areq_ctx->dst.mlli_nents; + } + } + } +} + +int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req) +{ + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); + struct mlli_params *mlli_params = &areq_ctx->mlli_params; + struct device *dev = drvdata_to_dev(drvdata); + struct buffer_array sg_data; + unsigned int authsize = areq_ctx->req_authsize; + struct buff_mgr_handle *buff_mgr = drvdata->buff_mgr_handle; + int rc = 0; + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + bool is_gcm4543 = areq_ctx->is_gcm4543; + dma_addr_t dma_addr; + u32 mapped_nents = 0; + u32 dummy = 0; /*used for the assoc data fragments */ + u32 size_to_map = 0; + gfp_t flags = cc_gfp_flags(&req->base); + + mlli_params->curr_pool = NULL; + sg_data.num_of_buffers = 0; + + /* copy mac to a temporary location to deal with possible + * data memory overriding that caused by cache coherence problem. + */ + if (drvdata->coherent && + areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT && + req->src == req->dst) + cc_copy_mac(dev, req, CC_SG_TO_BUF); + + /* cacluate the size for cipher remove ICV in decrypt*/ + areq_ctx->cryptlen = (areq_ctx->gen_ctx.op_type == + DRV_CRYPTO_DIRECTION_ENCRYPT) ? + req->cryptlen : + (req->cryptlen - authsize); + + dma_addr = dma_map_single(dev, areq_ctx->mac_buf, MAX_MAC_SIZE, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Mapping mac_buf %u B at va=%pK for DMA failed\n", + MAX_MAC_SIZE, areq_ctx->mac_buf); + rc = -ENOMEM; + goto aead_map_failure; + } + areq_ctx->mac_buf_dma_addr = dma_addr; + + if (areq_ctx->ccm_hdr_size != ccm_header_size_null) { + void *addr = areq_ctx->ccm_config + CCM_CTR_COUNT_0_OFFSET; + + dma_addr = dma_map_single(dev, addr, AES_BLOCK_SIZE, + DMA_TO_DEVICE); + + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Mapping mac_buf %u B at va=%pK for DMA failed\n", + AES_BLOCK_SIZE, addr); + areq_ctx->ccm_iv0_dma_addr = 0; + rc = -ENOMEM; + goto aead_map_failure; + } + areq_ctx->ccm_iv0_dma_addr = dma_addr; + + if (cc_set_aead_conf_buf(dev, areq_ctx, areq_ctx->ccm_config, + &sg_data, req->assoclen)) { + rc = -ENOMEM; + goto aead_map_failure; + } + } + + if (areq_ctx->cipher_mode == DRV_CIPHER_GCTR) { + dma_addr = dma_map_single(dev, areq_ctx->hkey, AES_BLOCK_SIZE, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Mapping hkey %u B at va=%pK for DMA failed\n", + AES_BLOCK_SIZE, areq_ctx->hkey); + rc = -ENOMEM; + goto aead_map_failure; + } + areq_ctx->hkey_dma_addr = dma_addr; + + dma_addr = dma_map_single(dev, &areq_ctx->gcm_len_block, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Mapping gcm_len_block %u B at va=%pK for DMA failed\n", + AES_BLOCK_SIZE, &areq_ctx->gcm_len_block); + rc = -ENOMEM; + goto aead_map_failure; + } + areq_ctx->gcm_block_len_dma_addr = dma_addr; + + dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc1, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Mapping gcm_iv_inc1 %u B at va=%pK for DMA failed\n", + AES_BLOCK_SIZE, (areq_ctx->gcm_iv_inc1)); + areq_ctx->gcm_iv_inc1_dma_addr = 0; + rc = -ENOMEM; + goto aead_map_failure; + } + areq_ctx->gcm_iv_inc1_dma_addr = dma_addr; + + dma_addr = dma_map_single(dev, areq_ctx->gcm_iv_inc2, + AES_BLOCK_SIZE, DMA_TO_DEVICE); + + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Mapping gcm_iv_inc2 %u B at va=%pK for DMA failed\n", + AES_BLOCK_SIZE, (areq_ctx->gcm_iv_inc2)); + areq_ctx->gcm_iv_inc2_dma_addr = 0; + rc = -ENOMEM; + goto aead_map_failure; + } + areq_ctx->gcm_iv_inc2_dma_addr = dma_addr; + } + + size_to_map = req->cryptlen + req->assoclen; + if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT) + size_to_map += authsize; + + if (is_gcm4543) + size_to_map += crypto_aead_ivsize(tfm); + rc = cc_map_sg(dev, req->src, size_to_map, DMA_BIDIRECTIONAL, + &areq_ctx->src.nents, + (LLI_MAX_NUM_OF_ASSOC_DATA_ENTRIES + + LLI_MAX_NUM_OF_DATA_ENTRIES), + &dummy, &mapped_nents); + if (rc) { + rc = -ENOMEM; + goto aead_map_failure; + } + + if (areq_ctx->is_single_pass) { + /* + * Create MLLI table for: + * (1) Assoc. data + * (2) Src/Dst SGLs + * Note: IV is contg. buffer (not an SGL) + */ + rc = cc_aead_chain_assoc(drvdata, req, &sg_data, true, false); + if (rc) + goto aead_map_failure; + rc = cc_aead_chain_iv(drvdata, req, &sg_data, true, false); + if (rc) + goto aead_map_failure; + rc = cc_aead_chain_data(drvdata, req, &sg_data, true, false); + if (rc) + goto aead_map_failure; + } else { /* DOUBLE-PASS flow */ + /* + * Prepare MLLI table(s) in this order: + * + * If ENCRYPT/DECRYPT (inplace): + * (1) MLLI table for assoc + * (2) IV entry (chained right after end of assoc) + * (3) MLLI for src/dst (inplace operation) + * + * If ENCRYPT (non-inplace) + * (1) MLLI table for assoc + * (2) IV entry (chained right after end of assoc) + * (3) MLLI for dst + * (4) MLLI for src + * + * If DECRYPT (non-inplace) + * (1) MLLI table for assoc + * (2) IV entry (chained right after end of assoc) + * (3) MLLI for src + * (4) MLLI for dst + */ + rc = cc_aead_chain_assoc(drvdata, req, &sg_data, false, true); + if (rc) + goto aead_map_failure; + rc = cc_aead_chain_iv(drvdata, req, &sg_data, false, true); + if (rc) + goto aead_map_failure; + rc = cc_aead_chain_data(drvdata, req, &sg_data, true, true); + if (rc) + goto aead_map_failure; + } + + /* Mlli support -start building the MLLI according to the above + * results + */ + if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI || + areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) { + mlli_params->curr_pool = buff_mgr->mlli_buffs_pool; + rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags); + if (rc) + goto aead_map_failure; + + cc_update_aead_mlli_nents(drvdata, req); + dev_dbg(dev, "assoc params mn %d\n", + areq_ctx->assoc.mlli_nents); + dev_dbg(dev, "src params mn %d\n", areq_ctx->src.mlli_nents); + dev_dbg(dev, "dst params mn %d\n", areq_ctx->dst.mlli_nents); + } + return 0; + +aead_map_failure: + cc_unmap_aead_request(dev, req); + return rc; +} + int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx, struct scatterlist *src, unsigned int nbytes, bool do_update, gfp_t flags) diff --git a/drivers/crypto/ccree/cc_buffer_mgr.h b/drivers/crypto/ccree/cc_buffer_mgr.h index ff4a5ec..99b752a 100644 --- a/drivers/crypto/ccree/cc_buffer_mgr.h +++ b/drivers/crypto/ccree/cc_buffer_mgr.h @@ -50,6 +50,10 @@ void cc_unmap_blkcipher_request(struct device *dev, void *ctx, struct scatterlist *src, struct scatterlist *dst); +int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req); + +void cc_unmap_aead_request(struct device *dev, struct aead_request *req); + int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx, struct scatterlist *src, unsigned int nbytes, bool do_update, gfp_t flags); diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c index bd11693..31140e3 100644 --- a/drivers/crypto/ccree/cc_driver.c +++ b/drivers/crypto/ccree/cc_driver.c @@ -20,6 +20,7 @@ #include "cc_buffer_mgr.h" #include "cc_debugfs.h" #include "cc_cipher.h" +#include "cc_aead.h" #include "cc_hash.h" #include "cc_ivgen.h" #include "cc_sram_mgr.h" @@ -295,8 +296,16 @@ static int init_cc_resources(struct platform_device *plat_dev) goto post_cipher_err; } + rc = cc_aead_alloc(new_drvdata); + if (rc) { + dev_err(dev, "cc_aead_alloc failed\n"); + goto post_hash_err; + } + return 0; +post_hash_err: + cc_hash_free(new_drvdata); post_cipher_err: cc_cipher_free(new_drvdata); post_ivgen_err: @@ -329,6 +338,7 @@ static void cleanup_cc_resources(struct platform_device *plat_dev) struct cc_drvdata *drvdata = (struct cc_drvdata *)platform_get_drvdata(plat_dev); + cc_aead_free(drvdata); cc_hash_free(drvdata); cc_cipher_free(drvdata); cc_ivgen_fini(drvdata); diff --git a/drivers/crypto/ccree/cc_driver.h b/drivers/crypto/ccree/cc_driver.h index b772262..ab9a66f 100644 --- a/drivers/crypto/ccree/cc_driver.h +++ b/drivers/crypto/ccree/cc_driver.h @@ -18,6 +18,7 @@ #include <crypto/internal/skcipher.h> #include <crypto/aes.h> #include <crypto/sha.h> +#include <crypto/aead.h> #include <crypto/authenc.h> #include <crypto/hash.h> #include <linux/version.h> @@ -111,6 +112,7 @@ struct cc_drvdata { cc_sram_addr_t mlli_sram_addr; void *buff_mgr_handle; void *hash_handle; + void *aead_handle; void *blkcipher_handle; void *request_mgr_handle; void *ivgen_handle; @@ -127,6 +129,7 @@ struct cc_crypto_alg { int auth_mode; struct cc_drvdata *drvdata; struct crypto_alg crypto_alg; + struct aead_alg aead_alg; }; struct cc_alg_template { @@ -136,6 +139,7 @@ struct cc_alg_template { u32 type; union { struct ablkcipher_alg ablkcipher; + struct aead_alg aead; struct blkcipher_alg blkcipher; struct cipher_alg cipher; struct compress_alg compress; -- 2.7.4