From ac646ee28e8c9780d02ec685b7581486c13f6961 Mon Sep 17 00:00:00 2001
From: Jie Hai <haijie1@huawei.com>
Date: Fri, 21 Oct 2022 15:36:39 +0800
Subject: [PATCH 163/189] net/hns3: fix minimum Tx frame length

When packet length in Tx is less than length hardware supported,
the minimum frame length in hns3 is used to do padding to avoid
hardware error. Currently, this length is fixed by macro, which
is very unfavorable for subsequent hardware evolution. So fix it
as firmware report.

Fixes: 395b5e08ef8d ("net/hns3: add Tx short frame padding compatibility")
Cc: stable@dpdk.org

Signed-off-by: Jie Hai <haijie1@huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/net/hns3/hns3_cmd.h       | 6 ++++++
 drivers/net/hns3/hns3_ethdev.c    | 4 +++-
 drivers/net/hns3/hns3_ethdev.h    | 3 +--
 drivers/net/hns3/hns3_ethdev_vf.c | 4 +++-
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/hns3/hns3_cmd.h b/drivers/net/hns3/hns3_cmd.h
index 8ac8b45819..994dfc48cc 100644
--- a/drivers/net/hns3/hns3_cmd.h
+++ b/drivers/net/hns3/hns3_cmd.h
@@ -967,6 +967,12 @@ struct hns3_dev_specs_0_cmd {
 	uint32_t max_tm_rate;
 };
 
+struct hns3_dev_specs_1_cmd {
+	uint8_t rsv0[12];
+	uint8_t min_tx_pkt_len;
+	uint8_t rsv1[11];
+};
+
 struct hns3_query_rpu_cmd {
 	uint32_t tc_queue_num;
 	uint32_t rsv1[2];
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 7b0e8fc77d..7330515535 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2661,14 +2661,17 @@ static void
 hns3_parse_dev_specifications(struct hns3_hw *hw, struct hns3_cmd_desc *desc)
 {
 	struct hns3_dev_specs_0_cmd *req0;
+	struct hns3_dev_specs_1_cmd *req1;
 
 	req0 = (struct hns3_dev_specs_0_cmd *)desc[0].data;
+	req1 = (struct hns3_dev_specs_1_cmd *)desc[1].data;
 
 	hw->max_non_tso_bd_num = req0->max_non_tso_bd_num;
 	hw->rss_ind_tbl_size = rte_le_to_cpu_16(req0->rss_ind_tbl_size);
 	hw->rss_key_size = rte_le_to_cpu_16(req0->rss_key_size);
 	hw->max_tm_rate = rte_le_to_cpu_32(req0->max_tm_rate);
 	hw->intr.int_ql_max = rte_le_to_cpu_16(req0->intr_ql_max);
+	hw->min_tx_pkt_len = req1->min_tx_pkt_len;
 }
 
 static int
@@ -2763,7 +2766,6 @@ hns3_get_capability(struct hns3_hw *hw)
 	hw->tso_mode = HNS3_TSO_HW_CAL_PSEUDO_H_CSUM;
 	hw->vlan_mode = HNS3_HW_SHIFT_AND_DISCARD_MODE;
 	hw->drop_stats_mode = HNS3_PKTS_DROP_STATS_MODE2;
-	hw->min_tx_pkt_len = HNS3_HIP09_MIN_TX_PKT_LEN;
 	pf->tqp_config_mode = HNS3_FLEX_MAX_TQP_NUM_MODE;
 	hw->rss_info.ipv6_sctp_offload_supported = true;
 	hw->udp_cksum_mode = HNS3_SPECIAL_PORT_HW_CKSUM_MODE;
diff --git a/drivers/net/hns3/hns3_ethdev.h b/drivers/net/hns3/hns3_ethdev.h
index 40476bf882..4406611fe9 100644
--- a/drivers/net/hns3/hns3_ethdev.h
+++ b/drivers/net/hns3/hns3_ethdev.h
@@ -75,7 +75,6 @@
 #define HNS3_DEFAULT_MTU		1500UL
 #define HNS3_DEFAULT_FRAME_LEN		(HNS3_DEFAULT_MTU + HNS3_ETH_OVERHEAD)
 #define HNS3_HIP08_MIN_TX_PKT_LEN	33
-#define HNS3_HIP09_MIN_TX_PKT_LEN	9
 
 #define HNS3_BITS_PER_BYTE	8
 
@@ -550,7 +549,7 @@ struct hns3_hw {
 	 * The minimum length of the packet supported by hardware in the Tx
 	 * direction.
 	 */
-	uint32_t min_tx_pkt_len;
+	uint8_t min_tx_pkt_len;
 
 	struct hns3_queue_intr intr;
 	/*
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 72d60191ab..6976a9f23d 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -701,13 +701,16 @@ static void
 hns3vf_parse_dev_specifications(struct hns3_hw *hw, struct hns3_cmd_desc *desc)
 {
 	struct hns3_dev_specs_0_cmd *req0;
+	struct hns3_dev_specs_1_cmd *req1;
 
 	req0 = (struct hns3_dev_specs_0_cmd *)desc[0].data;
+	req1 = (struct hns3_dev_specs_1_cmd *)desc[1].data;
 
 	hw->max_non_tso_bd_num = req0->max_non_tso_bd_num;
 	hw->rss_ind_tbl_size = rte_le_to_cpu_16(req0->rss_ind_tbl_size);
 	hw->rss_key_size = rte_le_to_cpu_16(req0->rss_key_size);
 	hw->intr.int_ql_max = rte_le_to_cpu_16(req0->intr_ql_max);
+	hw->min_tx_pkt_len = req1->min_tx_pkt_len;
 }
 
 static int
@@ -846,7 +849,6 @@ hns3vf_get_capability(struct hns3_hw *hw)
 	hw->intr.gl_unit = HNS3_INTR_COALESCE_GL_UINT_1US;
 	hw->tso_mode = HNS3_TSO_HW_CAL_PSEUDO_H_CSUM;
 	hw->drop_stats_mode = HNS3_PKTS_DROP_STATS_MODE2;
-	hw->min_tx_pkt_len = HNS3_HIP09_MIN_TX_PKT_LEN;
 	hw->rss_info.ipv6_sctp_offload_supported = true;
 	hw->promisc_mode = HNS3_LIMIT_PROMISC_MODE;
 
-- 
2.23.0