patch 'net/hns3: use hardware config to report redirection table' has been queued to stable release 22.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 22.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 04/11/23. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://git.dpdk.org/dpdk-stable/log/?h=22.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/log/?h=22.11-staging/commit/dde9ec15ea0e5461c9c2fb00e397d62a1e45a6f8

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From dde9ec15ea0e5461c9c2fb00e397d62a1e45a6f8 Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong at huawei.com>
Date: Fri, 10 Mar 2023 17:35:07 +0800
Subject: [PATCH] net/hns3: use hardware config to report redirection table
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit d1e37d1c6916858314a2c67e6317b0bb6c691b36 ]

Currently, reta_query() API reports the redirection table from software.
This patch uses the one in hardware to report.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3 at huawei.com>
---
 drivers/net/hns3/hns3_cmd.h |  1 +
 drivers/net/hns3/hns3_rss.c | 65 ++++++++++++++++++++++++++++++++++---
 2 files changed, 62 insertions(+), 4 deletions(-)

diff --git a/drivers/net/hns3/hns3_cmd.h b/drivers/net/hns3/hns3_cmd.h
index 994dfc48cc..eb394c9dec 100644
--- a/drivers/net/hns3/hns3_cmd.h
+++ b/drivers/net/hns3/hns3_cmd.h
@@ -606,6 +606,7 @@ struct hns3_rss_input_tuple_cmd {
 #define HNS3_RSS_CFG_TBL_SIZE_H		4
 #define HNS3_RSS_CFG_TBL_BW_H		2
 #define HNS3_RSS_CFG_TBL_BW_L		8
+#define HNS3_RSS_CFG_TBL_BW_H_M		0x3
 
 /* Configure the indirection table, opcode:0x0D07 */
 struct hns3_rss_indirection_table_cmd {
diff --git a/drivers/net/hns3/hns3_rss.c b/drivers/net/hns3/hns3_rss.c
index 9addc00a67..7dc4e03d83 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -481,6 +481,54 @@ hns3_set_rss_indir_table(struct hns3_hw *hw, uint16_t *indir, uint16_t size)
 	return 0;
 }
 
+static int
+hns3_get_rss_indir_table(struct hns3_hw *hw, uint16_t *indir, uint16_t size)
+{
+	struct hns3_rss_indirection_table_cmd *req;
+	uint16_t max_bd_num, cfg_tbl_size;
+	uint8_t qid_msb_off, qid_msb_idx;
+	struct hns3_cmd_desc desc;
+	uint16_t q_id, q_hi, q_lo;
+	uint8_t rss_result_h;
+	uint16_t i, j;
+	int ret;
+
+	req = (struct hns3_rss_indirection_table_cmd *)desc.data;
+	max_bd_num = DIV_ROUND_UP(size, HNS3_RSS_CFG_TBL_SIZE);
+	for (i = 0; i < max_bd_num; i++) {
+		hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_RSS_INDIR_TABLE,
+					  true);
+		req->start_table_index =
+				rte_cpu_to_le_16(i * HNS3_RSS_CFG_TBL_SIZE);
+		ret = hns3_cmd_send(hw, &desc, 1);
+		if (ret) {
+			hns3_err(hw, "fail to get RSS indirection table from firmware, ret = %d",
+				 ret);
+			return ret;
+		}
+
+		if (i == max_bd_num - 1 && (size % HNS3_RSS_CFG_TBL_SIZE) != 0)
+			cfg_tbl_size = size % HNS3_RSS_CFG_TBL_SIZE;
+		else
+			cfg_tbl_size = HNS3_RSS_CFG_TBL_SIZE;
+
+		for (j = 0; j < cfg_tbl_size; j++) {
+			qid_msb_idx =
+				j * HNS3_RSS_CFG_TBL_BW_H / HNS3_BITS_PER_BYTE;
+			rss_result_h = req->rss_result_h[qid_msb_idx];
+			qid_msb_off =
+				j * HNS3_RSS_CFG_TBL_BW_H % HNS3_BITS_PER_BYTE;
+			q_hi = (rss_result_h >> qid_msb_off) &
+						HNS3_RSS_CFG_TBL_BW_H_M;
+			q_lo = req->rss_result_l[j];
+			q_id = (q_hi << HNS3_RSS_CFG_TBL_BW_L) | q_lo;
+			indir[i * HNS3_RSS_CFG_TBL_SIZE + j] = q_id;
+		}
+	}
+
+	return 0;
+}
+
 int
 hns3_rss_reset_indir_table(struct hns3_hw *hw)
 {
@@ -842,10 +890,11 @@ hns3_dev_rss_reta_query(struct rte_eth_dev *dev,
 			uint16_t reta_size)
 {
 	struct hns3_adapter *hns = dev->data->dev_private;
+	uint16_t reta_table[HNS3_RSS_IND_TBL_SIZE_MAX];
 	struct hns3_hw *hw = &hns->hw;
-	struct hns3_rss_conf *rss_cfg = &hw->rss_info;
 	uint16_t idx, shift;
 	uint16_t i;
+	int ret;
 
 	if (reta_size != hw->rss_ind_tbl_size) {
 		hns3_err(hw, "The size of hash lookup table configured (%u)"
@@ -854,14 +903,22 @@ hns3_dev_rss_reta_query(struct rte_eth_dev *dev,
 		return -EINVAL;
 	}
 	rte_spinlock_lock(&hw->lock);
+	ret = hns3_get_rss_indir_table(hw, reta_table, reta_size);
+	if (ret != 0) {
+		rte_spinlock_unlock(&hw->lock);
+		hns3_err(hw, "query RSS redirection table failed, ret = %d.",
+			 ret);
+		return ret;
+	}
+	rte_spinlock_unlock(&hw->lock);
+
 	for (i = 0; i < reta_size; i++) {
 		idx = i / RTE_ETH_RETA_GROUP_SIZE;
 		shift = i % RTE_ETH_RETA_GROUP_SIZE;
 		if (reta_conf[idx].mask & (1ULL << shift))
-			reta_conf[idx].reta[shift] =
-						rss_cfg->rss_indirection_tbl[i];
+			reta_conf[idx].reta[shift] = reta_table[i];
 	}
-	rte_spinlock_unlock(&hw->lock);
+
 	return 0;
 }
 
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-04-09 21:45:40.729985800 +0800
+++ 0076-net-hns3-use-hardware-config-to-report-redirection-t.patch	2023-04-09 21:45:38.689042200 +0800
@@ -1 +1 @@
-From d1e37d1c6916858314a2c67e6317b0bb6c691b36 Mon Sep 17 00:00:00 2001
+From dde9ec15ea0e5461c9c2fb00e397d62a1e45a6f8 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit d1e37d1c6916858314a2c67e6317b0bb6c691b36 ]
@@ -10 +12,0 @@
-Cc: stable at dpdk.org