Re: [dpdk-dev] [PATCH v1] net/ice: update the RSS RETA size with support values

["Yang, Qiming" <qiming.yang@intel.com>]

-----Original Message-----
From: Wang, Haiyue 
Sent: Monday, May 20, 2019 4:15 PM
To: dev@dpdk.org; Zhang, Qi Z <qi.z.zhang@intel.com>; Yang, Qiming <qiming.yang@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; Lu, Wenzhuo <wenzhuo.lu@intel.com>
Cc: Wang, Haiyue <haiyue.wang@intel.com>
Subject: [PATCH v1] net/ice: update the RSS RETA size with support values

Since ice can support 128, 512, 2K RSS RETA size value, change the update API to set it to resize the RSS RETA table. And by default, use 512 to sync with ETH_RSS_RETA_SIZE_x maximum value definition.
Also the flag ICE_FLAG_RSS_AQ_CAPABLE is missed to set.

Fixes: 690175ee51bf ("net/ice: support getting device information")
Fixes: ff963bfa7cb1 ("net/ice: support RSS")

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
---
 drivers/net/ice/ice_ethdev.c | 41 +++++++++++++++++++++++++++--------------
 1 file changed, 27 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c index bbaa7cf..c4ea09f 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -1149,6 +1149,12 @@ ice_setup_vsi(struct ice_pf *pf, enum ice_vsi_type type)
 	TAILQ_INIT(&vsi->mac_list);
 	TAILQ_INIT(&vsi->vlan_list);
 
+	/* Be sync with ETH_RSS_RETA_SIZE_x maximum value definition */
+	pf->hash_lut_size = hw->func_caps.common_cap.rss_table_size >
+			ETH_RSS_RETA_SIZE_512 ? ETH_RSS_RETA_SIZE_512 :
+			hw->func_caps.common_cap.rss_table_size;
+	pf->flags |= ICE_FLAG_RSS_AQ_CAPABLE;
+
 	memset(&vsi_ctx, 0, sizeof(vsi_ctx));
 	/* base_queue in used in queue mapping of VSI add/update command.
 	 * Suppose vsi->base_queue is 0 now, don't consider SRIOV, VMDQ @@ -1627,7 +1633,7 @@ static int ice_init_rss(struct ice_pf *pf)
 	rss_conf = &dev->data->dev_conf.rx_adv_conf.rss_conf;
 	nb_q = dev->data->nb_rx_queues;
 	vsi->rss_key_size = ICE_AQC_GET_SET_RSS_KEY_DATA_RSS_KEY_SIZE;
-	vsi->rss_lut_size = hw->func_caps.common_cap.rss_table_size;
+	vsi->rss_lut_size = pf->hash_lut_size;
 
 	if (is_safe_mode) {
 		PMD_DRV_LOG(WARNING, "RSS is not supported in safe mode\n"); @@ -2033,7 +2039,7 @@ ice_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 	dev_info->rx_queue_offload_capa = 0;
 	dev_info->tx_queue_offload_capa = 0;
 
-	dev_info->reta_size = hw->func_caps.common_cap.rss_table_size;
+	dev_info->reta_size = pf->hash_lut_size;
 	dev_info->hash_key_size = (VSIQF_HKEY_MAX_INDEX + 1) * sizeof(uint32_t);
 
 	dev_info->default_rxconf = (struct rte_eth_rxconf) { @@ -2605,28 +2611,31 @@ ice_rss_reta_update(struct rte_eth_dev *dev,
 		    uint16_t reta_size)
 {
 	struct ice_pf *pf = ICE_DEV_PRIVATE_TO_PF(dev->data->dev_private);
-	struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	uint16_t i, lut_size = hw->func_caps.common_cap.rss_table_size;
+	uint16_t i, lut_size = pf->hash_lut_size;
 	uint16_t idx, shift;
 	uint8_t *lut;
 	int ret;
 
-	if (reta_size != lut_size ||
-	    reta_size > ETH_RSS_RETA_SIZE_512) {
+	if (reta_size != ICE_AQC_GSET_RSS_LUT_TABLE_SIZE_128 &&
+	    reta_size != ICE_AQC_GSET_RSS_LUT_TABLE_SIZE_512 &&
+	    reta_size != ICE_AQC_GSET_RSS_LUT_TABLE_SIZE_2K) {
 		PMD_DRV_LOG(ERR,
 			    "The size of hash lookup table configured (%d)"
 			    "doesn't match the number hardware can "
-			    "supported (%d)",
-			    reta_size, lut_size);
+			    "supported (128, 512, 2048)",
+			    reta_size);
 		return -EINVAL;
 	}
 
-	lut = rte_zmalloc(NULL, reta_size, 0);
+	/* It MUST use the current LUT size to get the RSS lookup table,
+	 * otherwise if will fail with -100 error code.
+	 */
+	lut = rte_zmalloc(NULL,  RTE_MAX(reta_size, lut_size), 0);
 	if (!lut) {
 		PMD_DRV_LOG(ERR, "No memory can be allocated");
 		return -ENOMEM;
 	}
-	ret = ice_get_rss_lut(pf->main_vsi, lut, reta_size);
+	ret = ice_get_rss_lut(pf->main_vsi, lut, lut_size);
 	if (ret)
 		goto out;
 
@@ -2637,6 +2646,12 @@ ice_rss_reta_update(struct rte_eth_dev *dev,
 			lut[i] = reta_conf[idx].reta[shift];
 	}
 	ret = ice_set_rss_lut(pf->main_vsi, lut, reta_size);
+	if (ret == 0 && lut_size != reta_size) {
+		PMD_DRV_LOG(INFO,
+			    "The size of hash lookup table is changed from (%d) to (%d)",
+			    lut_size, reta_size);
+		pf->hash_lut_size = reta_size;
+	}
 
 out:
 	rte_free(lut);
@@ -2650,14 +2665,12 @@ ice_rss_reta_query(struct rte_eth_dev *dev,
 		   uint16_t reta_size)
 {
 	struct ice_pf *pf = ICE_DEV_PRIVATE_TO_PF(dev->data->dev_private);
-	struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	uint16_t i, lut_size = hw->func_caps.common_cap.rss_table_size;
+	uint16_t i, lut_size = pf->hash_lut_size;
 	uint16_t idx, shift;
 	uint8_t *lut;
 	int ret;
 
-	if (reta_size != lut_size ||
-	    reta_size > ETH_RSS_RETA_SIZE_512) {
+	if (reta_size != lut_size) {
 		PMD_DRV_LOG(ERR,
 			    "The size of hash lookup table configured (%d)"
 			    "doesn't match the number hardware can "
--
2.7.4

Acked-by: Qiming Yang <qiming.yang@intel.com>