net: hns3: fix pfc packet number incorrect after querying pfc parameters

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>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
index 91cb578f56b80a2bd229441d550c5343dbb347ad..90013c131e9499712ff3aef4ed1c8a230cc49872 100644 (file)
--- 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;
 }
 

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 0fc2b81f4712dd7433a8f0ddc8b7145b2331e697..21aec4e470cf6532fc357a39733788016afc4815 100644 (file)
--- 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(struct hclge_dev *hdev, u32 *reg_num)
        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)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
index 21013776de559120101d09276675559c744a31e2..3c95c957d1e30a454abc8cb9ab123bf185fb6b89 100644 (file)
--- 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 hclge_vport *vport);
 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

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
index 95074e91a8466a3064eab898007511990acf9edf..a50e2edbf4a0f003b46accf73c1f66b23e50a322 100644 (file)
--- 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, u8 shaper_level,
        return 0;
 }
 
-static int hclge_pfc_stats_get(struct hclge_dev *hdev,
-                              enum hclge_opcode_type opcode, u64 *stats)
-{
-       struct hclge_desc desc[HCLGE_TM_PFC_PKT_GET_CMD_NUM];
-       int ret, i, j;
-
-       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);
+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)
+};
 
-       ret = hclge_cmd_send(&hdev->hw, desc, HCLGE_TM_PFC_PKT_GET_CMD_NUM);
-       if (ret)
-               return ret;
+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)
+};
 
-       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;
+static void hclge_pfc_stats_get(struct hclge_dev *hdev, bool tx, u64 *stats)
+{
+       const u16 *offset;
+       int i;
 
-               for (j = 0; j < HCLGE_TM_PFC_NUM_GET_PER_CMD; j++) {
-                       u32 index = i * HCLGE_TM_PFC_PKT_GET_CMD_NUM + j;
+       if (tx)
+               offset = hclge_pfc_tx_stats_offset;
+       else
+               offset = hclge_pfc_rx_stats_offset;
 
-                       if (index < HCLGE_MAX_TC_NUM)
-                               stats[index] =
-                                       le64_to_cpu(pfc_stats->pkt_num[j]);
-               }
-       }
-       return 0;
+       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)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.h
index 2ee9b795f71dc48c3b83f5a974b52ef75e548253..1db7f40b4525512e6af84853e28811cf2e6b7c07 100644 (file)
--- 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 *hdev);
 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);