+static inline uint32_t
+qat_bpicipher_preprocess(struct qat_session *ctx,
+ struct rte_crypto_op *op)
+{
+ uint8_t block_len = qat_cipher_get_block_size(ctx->qat_cipher_alg);
+ struct rte_crypto_sym_op *sym_op = op->sym;
+ uint8_t last_block_len = block_len > 0 ?
+ sym_op->cipher.data.length % block_len : 0;
+
+ if (last_block_len &&
+ ctx->qat_dir == ICP_QAT_HW_CIPHER_DECRYPT) {
+
+ /* Decrypt last block */
+ uint8_t *last_block, *dst, *iv;
+ uint32_t last_block_offset = sym_op->cipher.data.offset +
+ sym_op->cipher.data.length - last_block_len;
+ last_block = (uint8_t *) rte_pktmbuf_mtod_offset(sym_op->m_src,
+ uint8_t *, last_block_offset);
+
+ if (unlikely(sym_op->m_dst != NULL))
+ /* out-of-place operation (OOP) */
+ dst = (uint8_t *) rte_pktmbuf_mtod_offset(sym_op->m_dst,
+ uint8_t *, last_block_offset);
+ else
+ dst = last_block;
+
+ if (last_block_len < sym_op->cipher.data.length)
+ /* use previous block ciphertext as IV */
+ iv = last_block - block_len;
+ else
+ /* runt block, i.e. less than one full block */
+ iv = rte_crypto_op_ctod_offset(op, uint8_t *,
+ ctx->cipher_iv.offset);
+
+#ifdef RTE_LIBRTE_PMD_QAT_DEBUG_TX
+ rte_hexdump(stdout, "BPI: src before pre-process:", last_block,
+ last_block_len);
+ if (sym_op->m_dst != NULL)
+ rte_hexdump(stdout, "BPI: dst before pre-process:", dst,
+ last_block_len);
+#endif
+ bpi_cipher_decrypt(last_block, dst, iv, block_len,
+ last_block_len, ctx->bpi_ctx);
+#ifdef RTE_LIBRTE_PMD_QAT_DEBUG_TX
+ rte_hexdump(stdout, "BPI: src after pre-process:", last_block,
+ last_block_len);
+ if (sym_op->m_dst != NULL)
+ rte_hexdump(stdout, "BPI: dst after pre-process:", dst,
+ last_block_len);
+#endif
+ }
+
+ return sym_op->cipher.data.length - last_block_len;
+}
+
+static inline uint32_t
+qat_bpicipher_postprocess(struct qat_session *ctx,
+ struct rte_crypto_op *op)
+{
+ uint8_t block_len = qat_cipher_get_block_size(ctx->qat_cipher_alg);
+ struct rte_crypto_sym_op *sym_op = op->sym;
+ uint8_t last_block_len = block_len > 0 ?
+ sym_op->cipher.data.length % block_len : 0;
+
+ if (last_block_len > 0 &&
+ ctx->qat_dir == ICP_QAT_HW_CIPHER_ENCRYPT) {
+
+ /* Encrypt last block */
+ uint8_t *last_block, *dst, *iv;
+ uint32_t last_block_offset;
+
+ last_block_offset = sym_op->cipher.data.offset +
+ sym_op->cipher.data.length - last_block_len;
+ last_block = (uint8_t *) rte_pktmbuf_mtod_offset(sym_op->m_src,
+ uint8_t *, last_block_offset);
+
+ if (unlikely(sym_op->m_dst != NULL))
+ /* out-of-place operation (OOP) */
+ dst = (uint8_t *) rte_pktmbuf_mtod_offset(sym_op->m_dst,
+ uint8_t *, last_block_offset);
+ else
+ dst = last_block;
+
+ if (last_block_len < sym_op->cipher.data.length)
+ /* use previous block ciphertext as IV */
+ iv = dst - block_len;
+ else
+ /* runt block, i.e. less than one full block */
+ iv = rte_crypto_op_ctod_offset(op, uint8_t *,
+ ctx->cipher_iv.offset);
+
+#ifdef RTE_LIBRTE_PMD_QAT_DEBUG_RX
+ rte_hexdump(stdout, "BPI: src before post-process:", last_block,
+ last_block_len);
+ if (sym_op->m_dst != NULL)
+ rte_hexdump(stdout, "BPI: dst before post-process:",
+ dst, last_block_len);
+#endif
+ bpi_cipher_encrypt(last_block, dst, iv, block_len,
+ last_block_len, ctx->bpi_ctx);
+#ifdef RTE_LIBRTE_PMD_QAT_DEBUG_RX
+ rte_hexdump(stdout, "BPI: src after post-process:", last_block,
+ last_block_len);
+ if (sym_op->m_dst != NULL)
+ rte_hexdump(stdout, "BPI: dst after post-process:", dst,
+ last_block_len);
+#endif
+ }
+ return sym_op->cipher.data.length - last_block_len;
+}