dpdk: fix cryptodev raw data path dequeue

This patch fixes the dpdk cryptodev raw data path dequeue problem.
The fix involves DPDK QAT PMD changes and is to be upstreamed
as a patch. The patch is also sent to DPDK mailing list.

Type: fix

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
Change-Id: I1a9253c8a7fbc2aa43f19f90da45e64e2840356a

diff --git a/build/external/patches/dpdk_21.05/0001-crypto-qat-fix-failed-raw-data-path-dequeue.patch b/build/external/patches/dpdk_21.05/0001-crypto-qat-fix-failed-raw-data-path-dequeue.patch
new file mode 100644 (file)
index 0000000..88af37e
--- /dev/null
+++ b/build/external/patches/dpdk_21.05/0001-crypto-qat-fix-failed-raw-data-path-dequeue.patch
@@ -0,0 +1,40 @@
+From 154843b968e98e7d4683f1540631ca324c337073 Mon Sep 17 00:00:00 2001
+From: Fan Zhang <roy.fan.zhang@intel.com>
+Date: Tue, 27 Jul 2021 16:27:36 +0100
+Subject: [dpdk-dev] crypto/qat: fix failed raw data path dequeue
+
+This patch fixes the raw data path dequeue burst fail problem.
+Previously the in case the queue is full and not all packets
+asked to be dequeued are processed, the dequeue burst will
+never happen.
+
+Fixes: c21574edc52a ("cryptodev: add dequeue count parameter in raw API")
+Cc: roy.fan.zhang@intel.com
+
+Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
+---
+ drivers/crypto/qat/qat_sym_hw_dp.c | 8 --------
+ 1 file changed, 8 deletions(-)
+
+diff --git a/drivers/crypto/qat/qat_sym_hw_dp.c b/drivers/crypto/qat/qat_sym_hw_dp.c
+index 4305579b54..ac9ac05363 100644
+--- a/drivers/crypto/qat/qat_sym_hw_dp.c
++++ b/drivers/crypto/qat/qat_sym_hw_dp.c
+@@ -744,14 +744,6 @@ qat_sym_dp_dequeue_burst(void *qp_data, uint8_t *drv_ctx,
+               n = get_dequeue_count(resp_opaque);
+               if (unlikely(n == 0))
+                       return 0;
+-              else if (n > 1) {
+-                      head = (head + rx_queue->msg_size * (n - 1)) &
+-                              rx_queue->modulo_mask;
+-                      resp = (struct icp_qat_fw_comn_resp *)(
+-                              (uint8_t *)rx_queue->base_addr + head);
+-                      if (*(uint32_t *)resp == ADF_RING_EMPTY_SIG)
+-                              return 0;
+-              }
+       } else {
+               if (unlikely(max_nb_to_dequeue == 0))
+                       return 0;
+-- 
+2.25.1
+