[dpdk-dev] [PATCH v3 08/18] net/fm10k: 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: Qi Zhang <qi.z.zh...@intel.com>
Cc: Xiao Wang <xiao.w.w...@intel.com>

Signed-off-by: Ciara Power <ciara.po...@intel.com>
---
 drivers/net/fm10k/fm10k_ethdev.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index 5771d83b55..a8bc1036a3 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -2930,7 +2930,9 @@ fm10k_set_tx_function(struct rte_eth_dev *dev)
        if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
                /* primary process has set the ftag flag and offloads */
                txq = dev->data->tx_queues[0];
-               if (fm10k_tx_vec_condition_check(txq)) {
+               if (fm10k_tx_vec_condition_check(txq) ||
+                               rte_get_max_simd_bitwidth()
+                               < RTE_MAX_128_SIMD) {
                        dev->tx_pkt_burst = fm10k_xmit_pkts;
                        dev->tx_pkt_prepare = fm10k_prep_pkts;
                        PMD_INIT_LOG(DEBUG, "Use regular Tx func");
@@ -2949,7 +2951,8 @@ fm10k_set_tx_function(struct rte_eth_dev *dev)
                txq = dev->data->tx_queues[i];
                txq->tx_ftag_en = tx_ftag_en;
                /* Check if Vector Tx is satisfied */
-               if (fm10k_tx_vec_condition_check(txq))
+               if (fm10k_tx_vec_condition_check(txq) ||
+                               rte_get_max_simd_bitwidth() < RTE_MAX_128_SIMD)
                        use_sse = 0;
        }
 
@@ -2983,7 +2986,9 @@ fm10k_set_rx_function(struct rte_eth_dev *dev)
         * conditions to be met.
         */
        if (!fm10k_rx_vec_condition_check(dev) &&
-                       dev_info->rx_vec_allowed && !rx_ftag_en) {
+                       dev_info->rx_vec_allowed && !rx_ftag_en &&
+                               rte_get_max_simd_bitwidth()
+                               >= RTE_MAX_128_SIMD) {
                if (dev->data->scattered_rx)
                        dev->rx_pkt_burst = fm10k_recv_scattered_pkts_vec;
                else
-- 
2.17.1