[v1] drivers/crypto: cipher buffer alignment check
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Commit Message
Cipher length alignment checked for 3DES-CBC and AES-CBC to avoid slice
hang error in QAT CPM1.8
Signed-off-by: Sivaramakrishnan VenkatX <venkatx.sivaramakrishnan@intel.com>
---
drivers/crypto/qat/dev/qat_crypto_pmd_gens.h | 21 ++++++++++++++++++++
1 file changed, 21 insertions(+)
@@ -10,6 +10,13 @@
#include "qat_sym_session.h"
#include "qat_sym.h"
+#define AES_OR_3DES_MISALIGNED (ctx->qat_mode == ICP_QAT_HW_CIPHER_CBC_MODE && \
+ ((((ctx->qat_cipher_alg == ICP_QAT_HW_CIPHER_ALGO_AES128) || \
+ (ctx->qat_cipher_alg == ICP_QAT_HW_CIPHER_ALGO_AES192) || \
+ (ctx->qat_cipher_alg == ICP_QAT_HW_CIPHER_ALGO_AES256)) && \
+ (cipher_param->cipher_length % ICP_QAT_HW_AES_BLK_SZ)) || \
+ ((ctx->qat_cipher_alg == ICP_QAT_HW_CIPHER_ALGO_3DES) && \
+ (cipher_param->cipher_length % ICP_QAT_HW_3DES_BLK_SZ))))
#define QAT_SYM_DP_GET_MAX_ENQ(q, c, n) \
RTE_MIN((q->max_inflights - q->enqueued + q->dequeued - c), n)
@@ -699,6 +706,20 @@ enqueue_one_chain_job_gen1(struct qat_sym_session *ctx,
cipher_param->cipher_offset = ofs.ofs.cipher.head;
cipher_param->cipher_length = cipher_len;
+ /* Input cipher length alignment requirement for 3DES-CBC and AES-CBC.
+ * For 3DES-CBC cipher algo, ESP Payload size requires 8 Byte aligned.
+ * For AES-CBC cipher algo, ESP Payload size requires 16 Byte aligned.
+ * The alignment should be guaranteed by the ESP package padding field
+ * according to the RFC4303. Under this condition, QAT will pass through
+ * chain job as NULL cipher and NULL auth operation and report misalignment
+ * error detected.
+ */
+ if (AES_OR_3DES_MISALIGNED) {
+ QAT_LOG(ERR, "Input cipher length alignment error detected.\n");
+ ctx->qat_cipher_alg = ICP_QAT_HW_CIPHER_ALGO_NULL;
+ ctx->qat_hash_alg = ICP_QAT_HW_AUTH_ALGO_NULL;
+ cipher_param->cipher_length = 0;
+ }
qat_set_cipher_iv(cipher_param, cipher_iv, ctx->cipher_iv.length, req);
auth_param->auth_off = ofs.ofs.auth.head;