I40evf queue can not work properly with kernel pf driver. Eg. when
configure 8 queues pair, only 4 queues can receive packets, and half
packets will be lost if using 2 queues pair.
This issue is caused by misconfiguration of look up table, use aq command
to setup the lut to make it work properly.
Fixes: cea7a51c1750 ("i40evf: support RSS")
Cc: sta...@dpdk.org
Signed-off-by: Xiao Zhang <xiao.zh...@intel.com>
---
v4 move local variable definition to the begin of the function
v3 move LUT configuration in to i40evf_configure_rss
v2 change for loop format to avoid build patch issue
---
drivers/net/i40e/i40e_ethdev_vf.c | 32 ++++++++++++++++++++++++++------
1 file changed, 26 insertions(+), 6 deletions(-)
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c
b/drivers/net/i40e/i40e_ethdev_vf.c
index 308fb98..8c34afb 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -2598,7 +2598,10 @@ i40evf_config_rss(struct i40e_vf *vf)
struct i40e_hw *hw = I40E_VF_TO_HW(vf);
struct rte_eth_rss_conf rss_conf;
uint32_t i, j, lut = 0, nb_q = (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4;
+ uint32_t rss_lut_size = (I40E_VFQF_HLUT1_MAX_INDEX + 1) * 4;
uint16_t num;
+ uint8_t *lut;
+ int ret;
if (vf->dev_data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_RSS) {
i40evf_disable_rss(vf);
@@ -2608,12 +2611,29 @@ i40evf_config_rss(struct i40e_vf *vf)
num = RTE_MIN(vf->dev_data->nb_rx_queues, I40E_MAX_QP_NUM_PER_VF);
/* Fill out the look up table */
- for (i = 0, j = 0; i < nb_q; i++, j++) {
- if (j >= num)
- j = 0;
- lut = (lut << 8) | j;
- if ((i & 3) == 3)
- I40E_WRITE_REG(hw, I40E_VFQF_HLUT(i >> 2), lut);
+ if (!(vf->flags & I40E_FLAG_RSS_AQ_CAPABLE)) {
+ for (i = 0, j = 0; i < nb_q; i++, j++) {
+ if (j >= num)
+ j = 0;
+ lut = (lut << 8) | j;
+ if ((i & 3) == 3)
+ I40E_WRITE_REG(hw, I40E_VFQF_HLUT(i >> 2), lut);
+ }
+ } else {
+ lut = rte_zmalloc("i40e_rss_lut", rss_lut_size, 0);
+ if (!lut) {
+ PMD_DRV_LOG(ERR, "No memory can be allocated");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < rss_lut_size; i++)
+ lut[i] = i % vf->num_queue_pairs;
+
+ ret = i40evf_set_rss_lut(&vf->vsi, lut,
+ rss_lut_size);
+ rte_free(lut);
+ if (ret)
+ return ret;
}
rss_conf = vf->dev_data->dev_conf.rx_adv_conf.rss_conf;
--
2.7.4
