[dpdk-dev] [PATCH v7 09/18] net/ice: add checks for max SIMD bitwidth

[Ciara Power]

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.

Cc: Qiming Yang <qiming.y...@intel.com>
Cc: Qi Zhang <qi.z.zh...@intel.com>

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

---
v4: Updated enum name.
---
 drivers/net/ice/ice_rxtx.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
index 79e6df11f4..a1a6d4ac56 100644
--- a/drivers/net/ice/ice_rxtx.c
+++ b/drivers/net/ice/ice_rxtx.c
@@ -2989,7 +2989,9 @@ 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_get_max_simd_bitwidth()
+                               >= RTE_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 +3001,10 @@ 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_get_max_simd_bitwidth()
+                                       >= RTE_SIMD_256)
                                use_avx2 = true;
 
                } else {
@@ -3167,7 +3171,9 @@ 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_get_max_simd_bitwidth()
+                               >= RTE_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 +3183,10 @@ 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_get_max_simd_bitwidth()
+                                       >= RTE_SIMD_256)
                                use_avx2 = true;
 
                } else {
-- 
2.22.0