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From:   Giovanni Cabiddu <giovanni.cabiddu@intel.com>
To:     herbert@gondor.apana.org.au, agk@redhat.com, snitzer@kernel.org
Cc:     linux-crypto@vger.kernel.org, dm-devel@redhat.com,
        linux-kernel@vger.kernel.org, qat-linux@intel.com,
        heinzm@redhat.com, meenakshi.aggarwal@nxp.com, ebiggers@kernel.org,
        horia.geanta@nxp.com, V.Sethi@nxp.com, pankaj.gupta@nxp.com,
        gaurav.jain@nxp.com, davem@davemloft.net, iuliana.prodan@nxp.com,
        Giovanni Cabiddu <giovanni.cabiddu@intel.com>,
        Fiona Trahe <fiona.trahe@intel.com>
Subject: [PATCH 3/3] crypto: qat - remove CRYPTO_ALG_ALLOCATES_MEMORY flag
Date:   Wed,  5 Jul 2023 17:40:09 +0100
Message-Id: <20230705164009.58351-4-giovanni.cabiddu@intel.com>
In-Reply-To: <20230705164009.58351-1-giovanni.cabiddu@intel.com>
References: <20230705164009.58351-1-giovanni.cabiddu@intel.com>
MIME-Version: 1.0
Organization: Intel Research and Development Ireland Ltd - Co. Reg. #308263 - Collinstown Industrial Park, Leixlip, County Kildare - Ireland
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Precedence: bulk

Remove the CRYPTO_ALG_ALLOCATES_MEMORY flag from the aead, skcipher
and acomp alg structures since the driver does not allocate memory in
the request processing for scatterlists with 4 or less entries.

This allows the QAT driver to be used by dm-crypt.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Fiona Trahe <fiona.trahe@intel.com>
---
 drivers/crypto/intel/qat/qat_common/qat_algs.c      | 13 ++++++-------
 drivers/crypto/intel/qat/qat_common/qat_comp_algs.c |  2 +-
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/intel/qat/qat_common/qat_algs.c b/drivers/crypto/intel/qat/qat_common/qat_algs.c
index 3c4bba4a8779..a7a6ac33052a 100644
--- a/drivers/crypto/intel/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/intel/qat/qat_common/qat_algs.c
@@ -1278,7 +1278,7 @@ static struct aead_alg qat_aeads[] = { {
 		.cra_name = "authenc(hmac(sha1),cbc(aes))",
 		.cra_driver_name = "qat_aes_cbc_hmac_sha1",
 		.cra_priority = 4001,
-		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
+		.cra_flags = CRYPTO_ALG_ASYNC,
 		.cra_blocksize = AES_BLOCK_SIZE,
 		.cra_ctxsize = sizeof(struct qat_alg_aead_ctx),
 		.cra_module = THIS_MODULE,
@@ -1295,7 +1295,7 @@ static struct aead_alg qat_aeads[] = { {
 		.cra_name = "authenc(hmac(sha256),cbc(aes))",
 		.cra_driver_name = "qat_aes_cbc_hmac_sha256",
 		.cra_priority = 4001,
-		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
+		.cra_flags = CRYPTO_ALG_ASYNC,
 		.cra_blocksize = AES_BLOCK_SIZE,
 		.cra_ctxsize = sizeof(struct qat_alg_aead_ctx),
 		.cra_module = THIS_MODULE,
@@ -1312,7 +1312,7 @@ static struct aead_alg qat_aeads[] = { {
 		.cra_name = "authenc(hmac(sha512),cbc(aes))",
 		.cra_driver_name = "qat_aes_cbc_hmac_sha512",
 		.cra_priority = 4001,
-		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
+		.cra_flags = CRYPTO_ALG_ASYNC,
 		.cra_blocksize = AES_BLOCK_SIZE,
 		.cra_ctxsize = sizeof(struct qat_alg_aead_ctx),
 		.cra_module = THIS_MODULE,
@@ -1330,7 +1330,7 @@ static struct skcipher_alg qat_skciphers[] = { {
 	.base.cra_name = "cbc(aes)",
 	.base.cra_driver_name = "qat_aes_cbc",
 	.base.cra_priority = 4001,
-	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
+	.base.cra_flags = CRYPTO_ALG_ASYNC,
 	.base.cra_blocksize = AES_BLOCK_SIZE,
 	.base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx),
 	.base.cra_alignmask = 0,
@@ -1348,7 +1348,7 @@ static struct skcipher_alg qat_skciphers[] = { {
 	.base.cra_name = "ctr(aes)",
 	.base.cra_driver_name = "qat_aes_ctr",
 	.base.cra_priority = 4001,
-	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
+	.base.cra_flags = CRYPTO_ALG_ASYNC,
 	.base.cra_blocksize = 1,
 	.base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx),
 	.base.cra_alignmask = 0,
@@ -1366,8 +1366,7 @@ static struct skcipher_alg qat_skciphers[] = { {
 	.base.cra_name = "xts(aes)",
 	.base.cra_driver_name = "qat_aes_xts",
 	.base.cra_priority = 4001,
-	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK |
-			  CRYPTO_ALG_ALLOCATES_MEMORY,
+	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
 	.base.cra_blocksize = AES_BLOCK_SIZE,
 	.base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx),
 	.base.cra_alignmask = 0,
diff --git a/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c b/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c
index b533984906ec..bd1383da1c4a 100644
--- a/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c
+++ b/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c
@@ -442,7 +442,7 @@ static struct acomp_alg qat_acomp[] = { {
 		.cra_name = "deflate",
 		.cra_driver_name = "qat_deflate",
 		.cra_priority = 4001,
-		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
+		.cra_flags = CRYPTO_ALG_ASYNC,
 		.cra_ctxsize = sizeof(struct qat_compression_ctx),
 		.cra_module = THIS_MODULE,
 	},
-- 
2.40.1