From: Jie Wang <wangjie125@huawei.com>
Date: Wed, 10 Nov 2021 21:42:51 +0800
Subject: net: hns3: fix pfc packet number incorrect after querying pfc
parameters
Patch-mainline: v5.16-rc1
Git-commit: 0b653a81a26d66ffe526a54c2177e24fb1400301
References: bsc#1190336 stable-5.14.19
Currently, driver will send command to firmware to query pfc packet number
when user uses dcb tool to get pfc parameters. However, the periodic
service task will also periodically query and record MAC statistics,
including pfc packet number.
As the hardware registers of statistics is cleared after reading, it will
cause pfc packet number of MAC statistics are not correct after using dcb
tool to get pfc parameters.
To fix this problem, when user uses dcb tool to get pfc parameters, driver
updates MAC statistics firstly and then get pfc packet number from MAC
statistics.
Fixes: 64fd2300fcc1 ("net: hns3: add support for querying pfc puase packets statistic")
Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c | 18 +---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 4
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h | 4
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c | 72 ++++++++--------
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h | 4
5 files changed, 50 insertions(+), 52 deletions(-)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
@@ -286,28 +286,24 @@ err_out:
static int hclge_ieee_getpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
{
- u64 requests[HNAE3_MAX_TC], indications[HNAE3_MAX_TC];
struct hclge_vport *vport = hclge_get_vport(h);
struct hclge_dev *hdev = vport->back;
int ret;
- u8 i;
memset(pfc, 0, sizeof(*pfc));
pfc->pfc_cap = hdev->pfc_max;
pfc->pfc_en = hdev->tm_info.pfc_en;
- ret = hclge_pfc_tx_stats_get(hdev, requests);
- if (ret)
+ ret = hclge_mac_update_stats(hdev);
+ if (ret) {
+ dev_err(&hdev->pdev->dev,
+ "failed to update MAC stats, ret = %d.\n", ret);
return ret;
+ }
- ret = hclge_pfc_rx_stats_get(hdev, indications);
- if (ret)
- return ret;
+ hclge_pfc_tx_stats_get(hdev, pfc->requests);
+ hclge_pfc_rx_stats_get(hdev, pfc->indications);
- for (i = 0; i < HCLGE_MAX_TC_NUM; i++) {
- pfc->requests[i] = requests[i];
- pfc->indications[i] = indications[i];
- }
return 0;
}
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -26,8 +26,6 @@
#include "hclge_devlink.h"
#define HCLGE_NAME "hclge"
-#define HCLGE_STATS_READ(p, offset) (*(u64 *)((u8 *)(p) + (offset)))
-#define HCLGE_MAC_STATS_FIELD_OFF(f) (offsetof(struct hclge_mac_stats, f))
#define HCLGE_BUF_SIZE_UNIT 256U
#define HCLGE_BUF_MUL_BY 2
@@ -587,7 +585,7 @@ static int hclge_mac_query_reg_num(struc
return 0;
}
-static int hclge_mac_update_stats(struct hclge_dev *hdev)
+int hclge_mac_update_stats(struct hclge_dev *hdev)
{
/* The firmware supports the new statistics acquisition method */
if (hdev->ae_dev->dev_specs.mac_stats_num)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
@@ -852,6 +852,9 @@ struct hclge_vf_vlan_cfg {
(y) = (_k_ ^ ~_v_) & (_k_); \
} while (0)
+#define HCLGE_MAC_STATS_FIELD_OFF(f) (offsetof(struct hclge_mac_stats, f))
+#define HCLGE_STATS_READ(p, offset) (*(u64 *)((u8 *)(p) + (offset)))
+
#define HCLGE_MAC_TNL_LOG_SIZE 8
#define HCLGE_VPORT_NUM 256
struct hclge_dev {
@@ -1166,4 +1169,5 @@ void hclge_inform_vf_promisc_info(struct
int hclge_dbg_dump_rst_info(struct hclge_dev *hdev, char *buf, int len);
int hclge_push_vf_link_status(struct hclge_vport *vport);
int hclge_enable_vport_vlan_filter(struct hclge_vport *vport, bool request_en);
+int hclge_mac_update_stats(struct hclge_dev *hdev);
#endif
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
@@ -113,50 +113,50 @@ static int hclge_shaper_para_calc(u32 ir
return 0;
}
-static int hclge_pfc_stats_get(struct hclge_dev *hdev,
- enum hclge_opcode_type opcode, u64 *stats)
+static const u16 hclge_pfc_tx_stats_offset[] = {
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri0_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri1_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri2_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri3_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri4_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri5_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri6_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_tx_pfc_pri7_pkt_num)
+};
+
+static const u16 hclge_pfc_rx_stats_offset[] = {
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri0_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri1_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri2_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri3_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri4_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri5_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri6_pkt_num),
+ HCLGE_MAC_STATS_FIELD_OFF(mac_rx_pfc_pri7_pkt_num)
+};
+
+static void hclge_pfc_stats_get(struct hclge_dev *hdev, bool tx, u64 *stats)
{
- struct hclge_desc desc[HCLGE_TM_PFC_PKT_GET_CMD_NUM];
- int ret, i, j;
+ const u16 *offset;
+ int i;
- if (!(opcode == HCLGE_OPC_QUERY_PFC_RX_PKT_CNT ||
- opcode == HCLGE_OPC_QUERY_PFC_TX_PKT_CNT))
- return -EINVAL;
-
- for (i = 0; i < HCLGE_TM_PFC_PKT_GET_CMD_NUM - 1; i++) {
- hclge_cmd_setup_basic_desc(&desc[i], opcode, true);
- desc[i].flag |= cpu_to_le16(HCLGE_CMD_FLAG_NEXT);
- }
-
- hclge_cmd_setup_basic_desc(&desc[i], opcode, true);
-
- ret = hclge_cmd_send(&hdev->hw, desc, HCLGE_TM_PFC_PKT_GET_CMD_NUM);
- if (ret)
- return ret;
-
- for (i = 0; i < HCLGE_TM_PFC_PKT_GET_CMD_NUM; i++) {
- struct hclge_pfc_stats_cmd *pfc_stats =
- (struct hclge_pfc_stats_cmd *)desc[i].data;
-
- for (j = 0; j < HCLGE_TM_PFC_NUM_GET_PER_CMD; j++) {
- u32 index = i * HCLGE_TM_PFC_PKT_GET_CMD_NUM + j;
-
- if (index < HCLGE_MAX_TC_NUM)
- stats[index] =
- le64_to_cpu(pfc_stats->pkt_num[j]);
- }
- }
- return 0;
+ if (tx)
+ offset = hclge_pfc_tx_stats_offset;
+ else
+ offset = hclge_pfc_rx_stats_offset;
+
+ for (i = 0; i < HCLGE_MAX_TC_NUM; i++)
+ stats[i] = HCLGE_STATS_READ(&hdev->mac_stats, offset[i]);
}
-int hclge_pfc_rx_stats_get(struct hclge_dev *hdev, u64 *stats)
+void hclge_pfc_rx_stats_get(struct hclge_dev *hdev, u64 *stats)
{
- return hclge_pfc_stats_get(hdev, HCLGE_OPC_QUERY_PFC_RX_PKT_CNT, stats);
+ hclge_pfc_stats_get(hdev, false, stats);
}
-int hclge_pfc_tx_stats_get(struct hclge_dev *hdev, u64 *stats)
+void hclge_pfc_tx_stats_get(struct hclge_dev *hdev, u64 *stats)
{
- return hclge_pfc_stats_get(hdev, HCLGE_OPC_QUERY_PFC_TX_PKT_CNT, stats);
+ hclge_pfc_stats_get(hdev, true, stats);
}
int hclge_mac_pause_en_cfg(struct hclge_dev *hdev, bool tx, bool rx)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
@@ -228,8 +228,8 @@ int hclge_tm_dwrr_cfg(struct hclge_dev *
int hclge_tm_init_hw(struct hclge_dev *hdev, bool init);
int hclge_mac_pause_en_cfg(struct hclge_dev *hdev, bool tx, bool rx);
int hclge_pause_addr_cfg(struct hclge_dev *hdev, const u8 *mac_addr);
-int hclge_pfc_rx_stats_get(struct hclge_dev *hdev, u64 *stats);
-int hclge_pfc_tx_stats_get(struct hclge_dev *hdev, u64 *stats);
+void hclge_pfc_rx_stats_get(struct hclge_dev *hdev, u64 *stats);
+void hclge_pfc_tx_stats_get(struct hclge_dev *hdev, u64 *stats);
int hclge_tm_qs_shaper_cfg(struct hclge_vport *vport, int max_tx_rate);
int hclge_tm_get_qset_num(struct hclge_dev *hdev, u16 *qset_num);
int hclge_tm_get_pri_num(struct hclge_dev *hdev, u8 *pri_num);