/** * cnstr_shdsc_rfc4543_encap - IPSec ESP gmac encapsulation shared descriptor * (non-protocol). * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM. * @icvsize: integrity check value (ICV) size (truncated or full) */ void cnstr_shdsc_rfc4543_encap(u32 * const desc, struct alginfo *cdata, unsigned int icvsize) { u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd; init_sh_desc(desc, HDR_SHARE_SERIAL); /* Skip key loading if it is loaded due to sharing */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); if (cdata->key_inline) append_key_as_imm(desc, cdata->key_virt, cdata->keylen, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); else append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); set_jump_tgt_here(desc, key_jump_cmd); /* Class 1 operation */ append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT); /* assoclen + cryptlen = seqinlen */ append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ); /* * MOVE_LEN opcode is not available in all SEC HW revisions, * thus need to do some magic, i.e. self-patch the descriptor * buffer. */ read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 | (0x6 << MOVE_LEN_SHIFT)); write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF | (0x8 << MOVE_LEN_SHIFT)); /* Will read assoclen + cryptlen bytes */ append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ); /* Will write assoclen + cryptlen bytes */ append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ); /* Read and write assoclen + cryptlen bytes */ aead_append_src_dst(desc, FIFOLD_TYPE_AAD); set_move_tgt_here(desc, read_move_cmd); set_move_tgt_here(desc, write_move_cmd); append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO); /* Move payload data to OFIFO */ append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO); /* Write ICV */ append_seq_store(desc, icvsize, LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT); #ifdef DEBUG print_hex_dump(KERN_ERR, "rfc4543 enc shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/* * Descriptor to instantiate RNG State Handle 0 in normal mode and * load the JDKEK, TDKEK and TDSK registers */ static void build_instantiation_desc(u32 *desc, int handle, int do_sk) { u32 *jump_cmd, op_flags; init_job_desc(desc, 0); op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT; /* INIT RNG in non-test mode */ append_operation(desc, op_flags); if (!handle && do_sk) { /* * For SH0, Secure Keys must be generated as well */ /* wait for done */ jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1); set_jump_tgt_here(desc, jump_cmd); /* * load 1 to clear written reg: * resets the done interrrupt and returns the RNG to idle. */ append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW); /* Initialize State Handle */ append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | OP_ALG_AAI_RNG4_SK); } append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT); }
/** * cnstr_shdsc_ablkcipher_decap - ablkcipher decapsulation shared descriptor * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed * with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128. * @ivsize: initialization vector size * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template * @ctx1_iv_off: IV offset in CONTEXT1 register */ void cnstr_shdsc_ablkcipher_decap(u32 * const desc, struct alginfo *cdata, unsigned int ivsize, const bool is_rfc3686, const u32 ctx1_iv_off) { u32 *key_jump_cmd; init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX); /* Skip if already shared */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); /* Load class1 key only */ append_key_as_imm(desc, cdata->key_virt, cdata->keylen, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); /* Load nonce into CONTEXT1 reg */ if (is_rfc3686) { u8 *nonce = cdata->key_virt + cdata->keylen; append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE, LDST_CLASS_IND_CCB | LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM); append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO | MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) | (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT)); } set_jump_tgt_here(desc, key_jump_cmd); /* load IV */ append_seq_load(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT)); /* Load counter into CONTEXT1 reg */ if (is_rfc3686) append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) << LDST_OFFSET_SHIFT)); /* Choose operation */ if (ctx1_iv_off) append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT); else append_dec_op1(desc, cdata->algtype); /* Perform operation */ ablkcipher_append_src_dst(desc); #ifdef DEBUG print_hex_dump(KERN_ERR, "ablkcipher dec shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/* Set DK bit in class 1 operation if shared */ static inline void append_dec_op1(u32 *desc, u32 type) { u32 *jump_cmd, *uncond_jump_cmd; /* DK bit is valid only for AES */ if ((type & OP_ALG_ALGSEL_MASK) != OP_ALG_ALGSEL_AES) { append_operation(desc, type | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT); return; } jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD); append_operation(desc, type | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT); uncond_jump_cmd = append_jump(desc, JUMP_TEST_ALL); set_jump_tgt_here(desc, jump_cmd); append_operation(desc, type | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT | OP_ALG_AAI_DK); set_jump_tgt_here(desc, uncond_jump_cmd); }
static void init_sh_desc_key_aead(u32 * const desc, struct alginfo * const cdata, struct alginfo * const adata, const bool is_rfc3686, u32 *nonce) { u32 *key_jump_cmd; unsigned int enckeylen = cdata->keylen; /* Note: Context registers are saved. */ init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX); /* Skip if already shared */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); /* * RFC3686 specific: * | key = {AUTH_KEY, ENC_KEY, NONCE} * | enckeylen = encryption key size + nonce size */ if (is_rfc3686) enckeylen -= CTR_RFC3686_NONCE_SIZE; if (adata->key_inline) append_key_as_imm(desc, adata->key_virt, adata->keylen_pad, adata->keylen, CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC); else append_key(desc, adata->key_dma, adata->keylen, CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC); if (cdata->key_inline) append_key_as_imm(desc, cdata->key_virt, enckeylen, enckeylen, CLASS_1 | KEY_DEST_CLASS_REG); else append_key(desc, cdata->key_dma, enckeylen, CLASS_1 | KEY_DEST_CLASS_REG); /* Load Counter into CONTEXT1 reg */ if (is_rfc3686) { append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE, LDST_CLASS_IND_CCB | LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM); append_move(desc, MOVE_SRC_OUTFIFO | MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) | (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT)); } set_jump_tgt_here(desc, key_jump_cmd); }
/** * cnstr_shdsc_xts_ablkcipher_encap - xts ablkcipher encapsulation shared * descriptor * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_XTS. */ void cnstr_shdsc_xts_ablkcipher_encap(u32 * const desc, struct alginfo *cdata) { __be64 sector_size = cpu_to_be64(512); u32 *key_jump_cmd; init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX); /* Skip if already shared */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); /* Load class1 keys only */ append_key_as_imm(desc, cdata->key_virt, cdata->keylen, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); /* Load sector size with index 40 bytes (0x28) */ append_load_as_imm(desc, (void *)§or_size, 8, LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | (0x28 << LDST_OFFSET_SHIFT)); set_jump_tgt_here(desc, key_jump_cmd); /* * create sequence for loading the sector index * Upper 8B of IV - will be used as sector index * Lower 8B of IV - will be discarded */ append_seq_load(desc, 8, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB | (0x20 << LDST_OFFSET_SHIFT)); append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP); /* Load operation */ append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT); /* Perform operation */ ablkcipher_append_src_dst(desc); #ifdef DEBUG print_hex_dump(KERN_ERR, "xts ablkcipher enc shdesc@" __stringify(__LINE__) ": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/* * Descriptor to instantiate RNG State Handle 0 in normal mode and * load the JDKEK, TDKEK and TDSK registers */ void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc) { u32 *jump_cmd; init_job_desc(desc, 0); /* INIT RNG in non-test mode */ append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | OP_ALG_AS_INIT); /* wait for done */ jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1); set_jump_tgt_here(desc, jump_cmd); /* * load 1 to clear written reg: * resets the done interrrupt and returns the RNG to idle. */ append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW); /* generate secure keys (non-test) */ append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | OP_ALG_RNG4_SK); }
/** * cnstr_shdsc_rfc4106_decap - IPSec ESP gcm decapsulation shared descriptor * (non-protocol). * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM. * @icvsize: integrity check value (ICV) size (truncated or full) */ void cnstr_shdsc_rfc4106_decap(u32 * const desc, struct alginfo *cdata, unsigned int icvsize) { u32 *key_jump_cmd; init_sh_desc(desc, HDR_SHARE_SERIAL); /* Skip key loading if it is loaded due to sharing */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); if (cdata->key_inline) append_key_as_imm(desc, cdata->key_virt, cdata->keylen, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); else append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); set_jump_tgt_here(desc, key_jump_cmd); /* Class 1 operation */ append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT | OP_ALG_ICV_ON); append_math_sub_imm_u32(desc, VARSEQINLEN, REG3, IMM, 8); append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ); /* Read assoc data */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF | FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1); /* Skip IV */ append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP); /* Will read cryptlen bytes */ append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG3, CAAM_CMD_SZ); /* Workaround for erratum A-005473 (simultaneous SEQ FIFO skips) */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_MSG); /* Skip assoc data */ append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF); /* Will write cryptlen bytes */ append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ); /* Store payload data */ append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF); /* Read encrypted data */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF | FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1); /* Read ICV */ append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1); #ifdef DEBUG print_hex_dump(KERN_ERR, "rfc4106 dec shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/** * cnstr_shdsc_gcm_decap - gcm decapsulation shared descriptor * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM. * @icvsize: integrity check value (ICV) size (truncated or full) */ void cnstr_shdsc_gcm_decap(u32 * const desc, struct alginfo *cdata, unsigned int icvsize) { u32 *key_jump_cmd, *zero_payload_jump_cmd, *zero_assoc_jump_cmd1; init_sh_desc(desc, HDR_SHARE_SERIAL); /* skip key loading if they are loaded due to sharing */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD | JUMP_COND_SELF); if (cdata->key_inline) append_key_as_imm(desc, cdata->key_virt, cdata->keylen, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); else append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); set_jump_tgt_here(desc, key_jump_cmd); /* class 1 operation */ append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT | OP_ALG_ICV_ON); /* if assoclen is ZERO, skip reading the assoc data */ append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ); zero_assoc_jump_cmd1 = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_MATH_Z); append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ); /* skip assoc data */ append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF); /* read assoc data */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF | FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1); set_jump_tgt_here(desc, zero_assoc_jump_cmd1); /* cryptlen = seqoutlen - assoclen */ append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ); /* jump to zero-payload command if cryptlen is zero */ zero_payload_jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_MATH_Z); append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ); /* store encrypted data */ append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF); /* read payload data */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF | FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1); /* zero-payload command */ set_jump_tgt_here(desc, zero_payload_jump_cmd); /* read ICV */ append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1); #ifdef DEBUG print_hex_dump(KERN_ERR, "gcm dec shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/** * cnstr_shdsc_aead_null_encap - IPSec ESP encapsulation shared descriptor * (non-protocol) with no (null) encryption. * @desc: pointer to buffer used for descriptor construction * @adata: pointer to authentication transform definitions. Note that since a * split key is to be used, the size of the split key itself is * specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, * SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP. * @icvsize: integrity check value (ICV) size (truncated or full) * * Note: Requires an MDHA split key. */ void cnstr_shdsc_aead_null_encap(u32 * const desc, struct alginfo *adata, unsigned int icvsize) { u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd; init_sh_desc(desc, HDR_SHARE_SERIAL); /* Skip if already shared */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); if (adata->key_inline) append_key_as_imm(desc, adata->key_virt, adata->keylen_pad, adata->keylen, CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC); else append_key(desc, adata->key_dma, adata->keylen, CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC); set_jump_tgt_here(desc, key_jump_cmd); /* assoclen + cryptlen = seqinlen */ append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ); /* Prepare to read and write cryptlen + assoclen bytes */ append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ); append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ); /* * MOVE_LEN opcode is not available in all SEC HW revisions, * thus need to do some magic, i.e. self-patch the descriptor * buffer. */ read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 | (0x6 << MOVE_LEN_SHIFT)); write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF | MOVE_WAITCOMP | (0x8 << MOVE_LEN_SHIFT)); /* Class 2 operation */ append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT); /* Read and write cryptlen bytes */ aead_append_src_dst(desc, FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1); set_move_tgt_here(desc, read_move_cmd); set_move_tgt_here(desc, write_move_cmd); append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO); append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO | MOVE_AUX_LS); /* Write ICV */ append_seq_store(desc, icvsize, LDST_CLASS_2_CCB | LDST_SRCDST_BYTE_CONTEXT); #ifdef DEBUG print_hex_dump(KERN_ERR, "aead null enc shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/** * cnstr_shdsc_aead_givencap - IPSec ESP encapsulation shared descriptor * (non-protocol) with HW-generated initialization * vector. * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed * with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128. * @adata: pointer to authentication transform definitions. Note that since a * split key is to be used, the size of the split key itself is * specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, * SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP. * @ivsize: initialization vector size * @icvsize: integrity check value (ICV) size (truncated or full) * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template * @nonce: pointer to rfc3686 nonce * @ctx1_iv_off: IV offset in CONTEXT1 register * @is_qi: true when called from caam/qi * * Note: Requires an MDHA split key. */ void cnstr_shdsc_aead_givencap(u32 * const desc, struct alginfo *cdata, struct alginfo *adata, unsigned int ivsize, unsigned int icvsize, const bool is_rfc3686, u32 *nonce, const u32 ctx1_iv_off, const bool is_qi) { u32 geniv, moveiv; /* Note: Context registers are saved. */ init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce); if (is_qi) { u32 *wait_load_cmd; /* REG3 = assoclen */ append_seq_load(desc, 4, LDST_CLASS_DECO | LDST_SRCDST_WORD_DECO_MATH3 | (4 << LDST_OFFSET_SHIFT)); wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_CALM | JUMP_COND_NCP | JUMP_COND_NOP | JUMP_COND_NIP | JUMP_COND_NIFP); set_jump_tgt_here(desc, wait_load_cmd); } if (is_rfc3686) { if (is_qi) append_seq_load(desc, ivsize, LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | (ctx1_iv_off << LDST_OFFSET_SHIFT)); goto copy_iv; } /* Generate IV */ geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO | NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 | NFIFOENTRY_PTYPE_RND | (ivsize << NFIFOENTRY_DLEN_SHIFT); append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB | LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM); append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO); append_move(desc, MOVE_WAITCOMP | MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX | (ctx1_iv_off << MOVE_OFFSET_SHIFT) | (ivsize << MOVE_LEN_SHIFT)); append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO); copy_iv: /* Copy IV to class 1 context */ append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO | (ctx1_iv_off << MOVE_OFFSET_SHIFT) | (ivsize << MOVE_LEN_SHIFT)); /* Return to encryption */ append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT); /* Read and write assoclen bytes */ append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ); append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ); /* Skip assoc data */ append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF); /* read assoc before reading payload */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG | KEY_VLF); /* Copy iv from outfifo to class 2 fifo */ moveiv = NFIFOENTRY_STYPE_OFIFO | NFIFOENTRY_DEST_CLASS2 | NFIFOENTRY_DTYPE_MSG | (ivsize << NFIFOENTRY_DLEN_SHIFT); append_load_imm_u32(desc, moveiv, LDST_CLASS_IND_CCB | LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM); append_load_imm_u32(desc, ivsize, LDST_CLASS_2_CCB | LDST_SRCDST_WORD_DATASZ_REG | LDST_IMM); /* Load Counter into CONTEXT1 reg */ if (is_rfc3686) append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) << LDST_OFFSET_SHIFT)); /* Class 1 operation */ append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT); /* Will write ivsize + cryptlen */ append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ); /* Not need to reload iv */ append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_SKIP); /* Will read cryptlen */ append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ); append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | KEY_VLF | FIFOLD_TYPE_MSG1OUT2 | FIFOLD_TYPE_LASTBOTH); append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF); /* Write ICV */ append_seq_store(desc, icvsize, LDST_CLASS_2_CCB | LDST_SRCDST_BYTE_CONTEXT); #ifdef DEBUG print_hex_dump(KERN_ERR, "aead givenc shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/** * cnstr_shdsc_aead_decap - IPSec ESP decapsulation shared descriptor * (non-protocol). * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed * with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128. * @adata: pointer to authentication transform definitions. Note that since a * split key is to be used, the size of the split key itself is * specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, * SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP. * @ivsize: initialization vector size * @icvsize: integrity check value (ICV) size (truncated or full) * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template * @nonce: pointer to rfc3686 nonce * @ctx1_iv_off: IV offset in CONTEXT1 register * @is_qi: true when called from caam/qi * * Note: Requires an MDHA split key. */ void cnstr_shdsc_aead_decap(u32 * const desc, struct alginfo *cdata, struct alginfo *adata, unsigned int ivsize, unsigned int icvsize, const bool geniv, const bool is_rfc3686, u32 *nonce, const u32 ctx1_iv_off, const bool is_qi) { /* Note: Context registers are saved. */ init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce); /* Class 2 operation */ append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT | OP_ALG_ICV_ON); if (is_qi) { u32 *wait_load_cmd; /* REG3 = assoclen */ append_seq_load(desc, 4, LDST_CLASS_DECO | LDST_SRCDST_WORD_DECO_MATH3 | (4 << LDST_OFFSET_SHIFT)); wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_CALM | JUMP_COND_NCP | JUMP_COND_NOP | JUMP_COND_NIP | JUMP_COND_NIFP); set_jump_tgt_here(desc, wait_load_cmd); if (!geniv) append_seq_load(desc, ivsize, LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | (ctx1_iv_off << LDST_OFFSET_SHIFT)); } /* Read and write assoclen bytes */ append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ); if (geniv) append_math_add_imm_u32(desc, VARSEQOUTLEN, REG3, IMM, ivsize); else append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ); /* Skip assoc data */ append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF); /* read assoc before reading payload */ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG | KEY_VLF); if (geniv) { append_seq_load(desc, ivsize, LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | (ctx1_iv_off << LDST_OFFSET_SHIFT)); append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO | (ctx1_iv_off << MOVE_OFFSET_SHIFT) | ivsize); } /* Load Counter into CONTEXT1 reg */ if (is_rfc3686) append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) << LDST_OFFSET_SHIFT)); /* Choose operation */ if (ctx1_iv_off) append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT); else append_dec_op1(desc, cdata->algtype); /* Read and write cryptlen bytes */ append_math_add(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ); append_math_add(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ); aead_append_src_dst(desc, FIFOLD_TYPE_MSG); /* Load ICV */ append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV); #ifdef DEBUG print_hex_dump(KERN_ERR, "aead dec shdesc@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }
/** * cnstr_shdsc_ablkcipher_givencap - ablkcipher encapsulation shared descriptor * with HW-generated initialization vector. * @desc: pointer to buffer used for descriptor construction * @cdata: pointer to block cipher transform definitions * Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed * with OP_ALG_AAI_CBC. * @ivsize: initialization vector size * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template * @ctx1_iv_off: IV offset in CONTEXT1 register */ void cnstr_shdsc_ablkcipher_givencap(u32 * const desc, struct alginfo *cdata, unsigned int ivsize, const bool is_rfc3686, const u32 ctx1_iv_off) { u32 *key_jump_cmd, geniv; init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX); /* Skip if already shared */ key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_SHRD); /* Load class1 key only */ append_key_as_imm(desc, cdata->key_virt, cdata->keylen, cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG); /* Load Nonce into CONTEXT1 reg */ if (is_rfc3686) { u8 *nonce = cdata->key_virt + cdata->keylen; append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE, LDST_CLASS_IND_CCB | LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM); append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO | MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) | (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT)); } set_jump_tgt_here(desc, key_jump_cmd); /* Generate IV */ geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO | NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 | NFIFOENTRY_PTYPE_RND | (ivsize << NFIFOENTRY_DLEN_SHIFT); append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB | LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM); append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO); append_move(desc, MOVE_WAITCOMP | MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX | (ivsize << MOVE_LEN_SHIFT) | (ctx1_iv_off << MOVE_OFFSET_SHIFT)); append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO); /* Copy generated IV to memory */ append_seq_store(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT)); /* Load Counter into CONTEXT1 reg */ if (is_rfc3686) append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT | ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) << LDST_OFFSET_SHIFT)); if (ctx1_iv_off) append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_NCP | (1 << JUMP_OFFSET_SHIFT)); /* Load operation */ append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT); /* Perform operation */ ablkcipher_append_src_dst(desc); #ifdef DEBUG print_hex_dump(KERN_ERR, "ablkcipher givenc shdesc@" __stringify(__LINE__) ": ", DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); #endif }