From: Ciara Power <ciara.power@intel.com>
Date: Mon, 19 Oct 2020 13:48:49 +0000 (+0200)
Subject: net/ice: check max SIMD bitwidth
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c3d9ed69ffc32c3dc9239a5c2c64e5ee05032bf5;p=dpdk.git

net/ice: check max SIMD bitwidth

When choosing a vector path to take, an extra condition must be
satisfied to ensure the max SIMD bitwidth allows for the CPU enabled
path.

Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
---

diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
index 79e6df11f4..ee576c362a 100644
--- a/drivers/net/ice/ice_rxtx.c
+++ b/drivers/net/ice/ice_rxtx.c
@@ -4,6 +4,7 @@
 
 #include <rte_ethdev_driver.h>
 #include <rte_net.h>
+#include <rte_vect.h>
 
 #include "rte_pmd_ice.h"
 #include "ice_rxtx.h"
@@ -2989,7 +2990,8 @@ ice_set_rx_function(struct rte_eth_dev *dev)
 	bool use_avx2 = false;
 
 	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-		if (!ice_rx_vec_dev_check(dev) && ad->rx_bulk_alloc_allowed) {
+		if (!ice_rx_vec_dev_check(dev) && ad->rx_bulk_alloc_allowed &&
+				rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_128) {
 			ad->rx_vec_allowed = true;
 			for (i = 0; i < dev->data->nb_rx_queues; i++) {
 				rxq = dev->data->rx_queues[i];
@@ -2999,8 +3001,9 @@ ice_set_rx_function(struct rte_eth_dev *dev)
 				}
 			}
 
-			if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) == 1 ||
-			rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1)
+			if ((rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) == 1 ||
+			     rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1) &&
+					rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_256)
 				use_avx2 = true;
 
 		} else {
@@ -3167,7 +3170,8 @@ ice_set_tx_function(struct rte_eth_dev *dev)
 	bool use_avx2 = false;
 
 	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-		if (!ice_tx_vec_dev_check(dev)) {
+		if (!ice_tx_vec_dev_check(dev) &&
+				rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_128) {
 			ad->tx_vec_allowed = true;
 			for (i = 0; i < dev->data->nb_tx_queues; i++) {
 				txq = dev->data->tx_queues[i];
@@ -3177,8 +3181,9 @@ ice_set_tx_function(struct rte_eth_dev *dev)
 				}
 			}
 
-			if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) == 1 ||
-			rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1)
+			if ((rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) == 1 ||
+			     rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1) &&
+					rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_256)
 				use_avx2 = true;
 
 		} else {