crypto: caam - add support for rfc4543(gcm(aes))

Add AES-GMAC as an IPSec ESP mechanism to provide
data origin authentication, but not confidentiality.
This method is referred as ENCR_NULL_AUTH_AES_GMAC.

Signed-off-by: Tudor Ambarus <tudor.ambarus@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 457 insertions, 1 deletions

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 36434d9eefa..48df0520ed4 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -83,13 +83,18 @@
 #define DESC_RFC4106_DEC_LEN		(DESC_RFC4106_BASE + 14 * CAAM_CMD_SZ)
 #define DESC_RFC4106_GIVENC_LEN		(DESC_RFC4106_BASE + 21 * CAAM_CMD_SZ)
 
+#define DESC_RFC4543_BASE		(3 * CAAM_CMD_SZ)
+#define DESC_RFC4543_ENC_LEN		(DESC_RFC4543_BASE + 25 * CAAM_CMD_SZ)
+#define DESC_RFC4543_DEC_LEN		(DESC_RFC4543_BASE + 27 * CAAM_CMD_SZ)
+#define DESC_RFC4543_GIVENC_LEN		(DESC_RFC4543_BASE + 30 * CAAM_CMD_SZ)
+
 #define DESC_ABLKCIPHER_BASE		(3 * CAAM_CMD_SZ)
 #define DESC_ABLKCIPHER_ENC_LEN		(DESC_ABLKCIPHER_BASE + \
 					 20 * CAAM_CMD_SZ)
 #define DESC_ABLKCIPHER_DEC_LEN		(DESC_ABLKCIPHER_BASE + \
 					 15 * CAAM_CMD_SZ)
 
-#define DESC_MAX_USED_BYTES		(DESC_AEAD_GIVENC_LEN + \
+#define DESC_MAX_USED_BYTES		(DESC_RFC4543_GIVENC_LEN + \
 					 CAAM_MAX_KEY_SIZE)
 #define DESC_MAX_USED_LEN		(DESC_MAX_USED_BYTES / CAAM_CMD_SZ)
 
@@ -1150,6 +1155,401 @@ static int rfc4106_setauthsize(struct crypto_aead *authenc,
 	return 0;
 }
 
+static int rfc4543_set_sh_desc(struct crypto_aead *aead)
+{
+	struct aead_tfm *tfm = &aead->base.crt_aead;
+	struct caam_ctx *ctx = crypto_aead_ctx(aead);
+	struct device *jrdev = ctx->jrdev;
+	bool keys_fit_inline = false;
+	u32 *key_jump_cmd, *write_iv_cmd, *write_aad_cmd;
+	u32 *read_move_cmd, *write_move_cmd;
+	u32 *desc;
+	u32 geniv;
+
+	if (!ctx->enckeylen || !ctx->authsize)
+		return 0;
+
+	/*
+	 * RFC4543 encrypt shared descriptor
+	 * Job Descriptor and Shared Descriptor
+	 * must fit into the 64-word Descriptor h/w Buffer
+	 */
+	if (DESC_RFC4543_ENC_LEN + DESC_JOB_IO_LEN +
+	    ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
+		keys_fit_inline = true;
+
+	desc = ctx->sh_desc_enc;
+
+	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 (keys_fit_inline)
+		append_key_as_imm(desc, (void *)ctx->key, ctx->enckeylen,
+				  ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+	else
+		append_key(desc, ctx->key_dma, ctx->enckeylen,
+			   CLASS_1 | KEY_DEST_CLASS_REG);
+	set_jump_tgt_here(desc, key_jump_cmd);
+
+	/* Class 1 operation */
+	append_operation(desc, ctx->class1_alg_type |
+			 OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT);
+
+	/* Load AES-GMAC ESP IV into Math1 register */
+	append_cmd(desc, CMD_SEQ_LOAD | LDST_SRCDST_WORD_DECO_MATH1 |
+		   LDST_CLASS_DECO | tfm->ivsize);
+
+	/* Wait the DMA transaction to finish */
+	append_jump(desc, JUMP_TEST_ALL | JUMP_COND_CALM |
+		    (1 << JUMP_OFFSET_SHIFT));
+
+	/* Overwrite blank immediate AES-GMAC ESP IV data */
+	write_iv_cmd = append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_DESCBUF |
+				   (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* Overwrite blank immediate AAD data */
+	write_aad_cmd = append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_DESCBUF |
+				    (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* cryptlen = seqoutlen - authsize */
+	append_math_sub_imm_u32(desc, REG3, SEQOUTLEN, IMM, ctx->authsize);
+
+	/* assoclen = (seqinlen - ivsize) - cryptlen */
+	append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG3, CAAM_CMD_SZ);
+
+	/* Read Salt and AES-GMAC ESP IV */
+	append_cmd(desc, CMD_FIFO_LOAD | FIFOLD_CLASS_CLASS1 | IMMEDIATE |
+		   FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1 | (4 + tfm->ivsize));
+	/* Append Salt */
+	append_data(desc, (void *)(ctx->key + ctx->enckeylen), 4);
+	set_move_tgt_here(desc, write_iv_cmd);
+	/* Blank commands. Will be overwritten by AES-GMAC ESP IV. */
+	append_cmd(desc, 0x00000000);
+	append_cmd(desc, 0x00000000);
+	/* End of blank commands */
+
+	/* Read assoc data */
+	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
+			     FIFOLD_TYPE_AAD);
+
+	/* Will read cryptlen bytes */
+	append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
+
+	/* Will write cryptlen bytes */
+	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 |
+				     (0x8 << MOVE_LEN_SHIFT));
+
+	/* Authenticate AES-GMAC ESP IV  */
+	append_cmd(desc, CMD_FIFO_LOAD | FIFOLD_CLASS_CLASS1 | IMMEDIATE |
+		   FIFOLD_TYPE_AAD | tfm->ivsize);
+	set_move_tgt_here(desc, write_aad_cmd);
+	/* Blank commands. Will be overwritten by AES-GMAC ESP IV. */
+	append_cmd(desc, 0x00000000);
+	append_cmd(desc, 0x00000000);
+	/* End of blank commands */
+
+	/* Read and write 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, ctx->authsize, LDST_CLASS_1_CCB |
+			 LDST_SRCDST_BYTE_CONTEXT);
+
+	ctx->sh_desc_enc_dma = dma_map_single(jrdev, desc,
+					      desc_bytes(desc),
+					      DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_enc_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "rfc4543 enc shdesc@"__stringify(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+		       desc_bytes(desc), 1);
+#endif
+
+	/*
+	 * Job Descriptor and Shared Descriptors
+	 * must all fit into the 64-word Descriptor h/w Buffer
+	 */
+	keys_fit_inline = false;
+	if (DESC_RFC4543_DEC_LEN + DESC_JOB_IO_LEN +
+	    ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
+		keys_fit_inline = true;
+
+	desc = ctx->sh_desc_dec;
+
+	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 (keys_fit_inline)
+		append_key_as_imm(desc, (void *)ctx->key, ctx->enckeylen,
+				  ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+	else
+		append_key(desc, ctx->key_dma, ctx->enckeylen,
+			   CLASS_1 | KEY_DEST_CLASS_REG);
+	set_jump_tgt_here(desc, key_jump_cmd);
+
+	/* Class 1 operation */
+	append_operation(desc, ctx->class1_alg_type |
+			 OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT | OP_ALG_ICV_ON);
+
+	/* Load AES-GMAC ESP IV into Math1 register */
+	append_cmd(desc, CMD_SEQ_LOAD | LDST_SRCDST_WORD_DECO_MATH1 |
+		   LDST_CLASS_DECO | tfm->ivsize);
+
+	/* Wait the DMA transaction to finish */
+	append_jump(desc, JUMP_TEST_ALL | JUMP_COND_CALM |
+		    (1 << JUMP_OFFSET_SHIFT));
+
+	/* assoclen + cryptlen = (seqinlen - ivsize) - icvsize */
+	append_math_sub_imm_u32(desc, REG3, SEQINLEN, IMM, ctx->authsize);
+
+	/* Overwrite blank immediate AES-GMAC ESP IV data */
+	write_iv_cmd = append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_DESCBUF |
+				   (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* Overwrite blank immediate AAD data */
+	write_aad_cmd = append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_DESCBUF |
+				    (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* assoclen = (assoclen + cryptlen) - cryptlen */
+	append_math_sub(desc, REG2, SEQOUTLEN, REG0, CAAM_CMD_SZ);
+	append_math_sub(desc, VARSEQINLEN, REG3, REG2, 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));
+
+	/* Read Salt and AES-GMAC ESP IV */
+	append_cmd(desc, CMD_FIFO_LOAD | FIFOLD_CLASS_CLASS1 | IMMEDIATE |
+		   FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1 | (4 + tfm->ivsize));
+	/* Append Salt */
+	append_data(desc, (void *)(ctx->key + ctx->enckeylen), 4);
+	set_move_tgt_here(desc, write_iv_cmd);
+	/* Blank commands. Will be overwritten by AES-GMAC ESP IV. */
+	append_cmd(desc, 0x00000000);
+	append_cmd(desc, 0x00000000);
+	/* End of blank commands */
+
+	/* Read assoc data */
+	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
+			     FIFOLD_TYPE_AAD);
+
+	/* Will read cryptlen bytes */
+	append_math_add(desc, VARSEQINLEN, ZERO, REG2, CAAM_CMD_SZ);
+
+	/* Will write cryptlen bytes */
+	append_math_add(desc, VARSEQOUTLEN, ZERO, REG2, CAAM_CMD_SZ);
+
+	/* Authenticate AES-GMAC ESP IV  */
+	append_cmd(desc, CMD_FIFO_LOAD | FIFOLD_CLASS_CLASS1 | IMMEDIATE |
+		   FIFOLD_TYPE_AAD | tfm->ivsize);
+	set_move_tgt_here(desc, write_aad_cmd);
+	/* Blank commands. Will be overwritten by AES-GMAC ESP IV. */
+	append_cmd(desc, 0x00000000);
+	append_cmd(desc, 0x00000000);
+	/* End of blank commands */
+
+	/* Store payload data */
+	append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
+
+	/* In-snoop cryptlen data */
+	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | FIFOLDST_VLF |
+			     FIFOLD_TYPE_AAD | FIFOLD_TYPE_LAST2FLUSH1);
+
+	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);
+	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
+
+	/* Read ICV */
+	append_seq_fifo_load(desc, ctx->authsize, FIFOLD_CLASS_CLASS1 |
+			     FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);
+
+	ctx->sh_desc_dec_dma = dma_map_single(jrdev, desc,
+					      desc_bytes(desc),
+					      DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_dec_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "rfc4543 dec shdesc@"__stringify(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+		       desc_bytes(desc), 1);
+#endif
+
+	/*
+	 * Job Descriptor and Shared Descriptors
+	 * must all fit into the 64-word Descriptor h/w Buffer
+	 */
+	keys_fit_inline = false;
+	if (DESC_RFC4543_GIVENC_LEN + DESC_JOB_IO_LEN +
+	    ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
+		keys_fit_inline = true;
+
+	/* rfc4543_givencrypt shared descriptor */
+	desc = ctx->sh_desc_givenc;
+
+	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 (keys_fit_inline)
+		append_key_as_imm(desc, (void *)ctx->key, ctx->enckeylen,
+				  ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+	else
+		append_key(desc, ctx->key_dma, ctx->enckeylen,
+			   CLASS_1 | KEY_DEST_CLASS_REG);
+	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 | (tfm->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);
+	/* Move generated IV to Math1 register */
+	append_move(desc, MOVE_SRC_INFIFO | MOVE_DEST_MATH1 |
+		    (tfm->ivsize << MOVE_LEN_SHIFT));
+	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
+
+	/* Overwrite blank immediate AES-GMAC IV data */
+	write_iv_cmd = append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_DESCBUF |
+				   (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* Overwrite blank immediate AAD data */
+	write_aad_cmd = append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_DESCBUF |
+				    (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* Copy generated IV to OFIFO */
+	append_move(desc, MOVE_SRC_MATH1 | MOVE_DEST_OUTFIFO |
+		    (tfm->ivsize << MOVE_LEN_SHIFT));
+
+	/* Class 1 operation */
+	append_operation(desc, ctx->class1_alg_type |
+			 OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT);
+
+	/* ivsize + cryptlen = seqoutlen - authsize */
+	append_math_sub_imm_u32(desc, REG3, SEQOUTLEN, IMM, ctx->authsize);
+
+	/* assoclen = seqinlen - (ivsize + cryptlen) */
+	append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG3, CAAM_CMD_SZ);
+
+	/* Will write ivsize + cryptlen */
+	append_math_add(desc, VARSEQOUTLEN, REG3, 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));
+
+	/* Read Salt and AES-GMAC generated IV */
+	append_cmd(desc, CMD_FIFO_LOAD | FIFOLD_CLASS_CLASS1 | IMMEDIATE |
+		   FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1 | (4 + tfm->ivsize));
+	/* Append Salt */
+	append_data(desc, (void *)(ctx->key + ctx->enckeylen), 4);
+	set_move_tgt_here(desc, write_iv_cmd);
+	/* Blank commands. Will be overwritten by AES-GMAC generated IV. */
+	append_cmd(desc, 0x00000000);
+	append_cmd(desc, 0x00000000);
+	/* End of blank commands */
+
+	/* No need to reload iv */
+	append_seq_fifo_load(desc, tfm->ivsize, FIFOLD_CLASS_SKIP);
+
+	/* Read assoc data */
+	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
+			     FIFOLD_TYPE_AAD);
+
+	/* Will read cryptlen */
+	append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
+
+	/* Authenticate AES-GMAC IV  */
+	append_cmd(desc, CMD_FIFO_LOAD | FIFOLD_CLASS_CLASS1 | IMMEDIATE |
+		   FIFOLD_TYPE_AAD | tfm->ivsize);
+	set_move_tgt_here(desc, write_aad_cmd);
+	/* Blank commands. Will be overwritten by AES-GMAC IV. */
+	append_cmd(desc, 0x00000000);
+	append_cmd(desc, 0x00000000);
+	/* End of blank commands */
+
+	/* Read and write 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, ctx->authsize, LDST_CLASS_1_CCB |
+			 LDST_SRCDST_BYTE_CONTEXT);
+
+	ctx->sh_desc_givenc_dma = dma_map_single(jrdev, desc,
+						 desc_bytes(desc),
+						 DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_givenc_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR,
+		       "rfc4543 givenc shdesc@"__stringify(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+		       desc_bytes(desc), 1);
+#endif
+
+	return 0;
+}
+
+static int rfc4543_setauthsize(struct crypto_aead *authenc,
+			       unsigned int authsize)
+{
+	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+
+	ctx->authsize = authsize;
+	rfc4543_set_sh_desc(authenc);
+
+	return 0;
+}
+
 static u32 gen_split_aead_key(struct caam_ctx *ctx, const u8 *key_in,
 			      u32 authkeylen)
 {
@@ -1292,6 +1692,45 @@ static int rfc4106_setkey(struct crypto_aead *aead,
 	return ret;
 }
 
+static int rfc4543_setkey(struct crypto_aead *aead,
+			  const u8 *key, unsigned int keylen)
+{
+	struct caam_ctx *ctx = crypto_aead_ctx(aead);
+	struct device *jrdev = ctx->jrdev;
+	int ret = 0;
+
+	if (keylen < 4)
+		return -EINVAL;
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "key in @"__stringify(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
+#endif
+
+	memcpy(ctx->key, key, keylen);
+
+	/*
+	 * The last four bytes of the key material are used as the salt value
+	 * in the nonce. Update the AES key length.
+	 */
+	ctx->enckeylen = keylen - 4;
+
+	ctx->key_dma = dma_map_single(jrdev, ctx->key, ctx->enckeylen,
+				      DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->key_dma)) {
+		dev_err(jrdev, "unable to map key i/o memory\n");
+		return -ENOMEM;
+	}
+
+	ret = rfc4543_set_sh_desc(aead);
+	if (ret) {
+		dma_unmap_single(jrdev, ctx->key_dma, ctx->enckeylen,
+				 DMA_TO_DEVICE);
+	}
+
+	return ret;
+}
+
 static int ablkcipher_setkey(struct crypto_ablkcipher *ablkcipher,
 			     const u8 *key, unsigned int keylen)
 {
@@ -3011,6 +3450,23 @@ static struct caam_alg_template driver_algs[] = {
 			},
 		.class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_GCM,
 	},
+	{
+		.name = "rfc4543(gcm(aes))",
+		.driver_name = "rfc4543-gcm-aes-caam",
+		.blocksize = 1,
+		.type = CRYPTO_ALG_TYPE_AEAD,
+		.template_aead = {
+			.setkey = rfc4543_setkey,
+			.setauthsize = rfc4543_setauthsize,
+			.encrypt = aead_encrypt,
+			.decrypt = aead_decrypt,
+			.givencrypt = aead_givencrypt,
+			.geniv = "<built-in>",
+			.ivsize = 8,
+			.maxauthsize = AES_BLOCK_SIZE,
+			},
+		.class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_GCM,
+	},
 	/* Galois Counter Mode */
 	{
 		.name = "gcm(aes)",