net: hns: bug fix about hisilicon TSO BD mode

The current upstreaming code fails to set the tso_mode register
when initilizes, when processes large size packets, the default 4 bd is
not enough, so this patch initilizes it and set the default value to 8 bds

Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 19 insertions, 2 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
index d2263c72bd8a..12188807468c 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
@@ -369,8 +369,17 @@ int hns_rcb_common_init_hw(struct rcb_common_cb *rcb_common)
         dsaf_write_dev(rcb_common, RCB_COM_CFG_ENDIAN_REG,
                        HNS_RCB_COMMON_ENDIAN);
 
-        dsaf_write_dev(rcb_common, RCB_COM_CFG_FNA_REG, 0x0);
-        dsaf_write_dev(rcb_common, RCB_COM_CFG_FA_REG, 0x1);
+        if (AE_IS_VER1(rcb_common->dsaf_dev->dsaf_ver)) {
+                dsaf_write_dev(rcb_common, RCB_COM_CFG_FNA_REG, 0x0);
+                dsaf_write_dev(rcb_common, RCB_COM_CFG_FA_REG, 0x1);
+        } else {
+                dsaf_set_dev_bit(rcb_common, RCBV2_COM_CFG_USER_REG,
+                                 RCB_COM_CFG_FNA_B, false);
+                dsaf_set_dev_bit(rcb_common, RCBV2_COM_CFG_USER_REG,
+                                 RCB_COM_CFG_FA_B, true);
+                dsaf_set_dev_bit(rcb_common, RCBV2_COM_CFG_TSO_MODE_REG,
+                                 RCB_COM_TSO_MODE_B, HNS_TSO_MODE_8BD_32K);
+        }
 
         return 0;
 }
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
index 29041b18741a..81fe9f849973 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
@@ -54,6 +54,9 @@ struct rcb_common_cb;
 #define HNS_DUMP_REG_NUM                        500
 #define HNS_STATIC_REG_NUM                      12
 
+#define HNS_TSO_MODE_8BD_32K                    1
+#define HNS_TSO_MDOE_4BD_16K                    0
+
 enum rcb_int_flag {
         RCB_INT_FLAG_TX = 0x1,
         RCB_INT_FLAG_RX = (0x1 << 1),
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
index 5d1b746e141d..f0c4f9b09d5b 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
@@ -363,6 +363,8 @@
 #define RCB_COM_CFG_FA_REG                      0x3C
 #define RCB_COM_CFG_PKT_TC_BP_REG               0x40
 #define RCB_COM_CFG_PPE_TNL_CLKEN_REG           0x44
+#define RCBV2_COM_CFG_USER_REG                  0x30
+#define RCBV2_COM_CFG_TSO_MODE_REG              0x50
 
 #define RCB_COM_INTMSK_TX_PKT_REG               0x3A0
 #define RCB_COM_RINT_TX_PKT_REG                 0x3A8
@@ -860,6 +862,9 @@
 
 #define PPE_COMMON_CNT_CLR_CE_B 0
 #define PPE_COMMON_CNT_CLR_SNAP_EN_B    1
+#define RCB_COM_TSO_MODE_B      0
+#define RCB_COM_CFG_FNA_B       1
+#define RCB_COM_CFG_FA_B        0
 
 #define GMAC_DUPLEX_TYPE_B 0