[dpdk-dev] [PATCH v3 10/11] net/igc: implement MAC-loopback mode

[alvinx . zhang]

From: Alvin Zhang <alvinx.zh...@intel.com>

enable mac-loopback mode.

Signed-off-by: Alvin Zhang <alvinx.zh...@intel.com>
---
 drivers/net/igc/igc_ethdev.c | 23 +++++++++++++++++++++++
 drivers/net/igc/igc_txrx.c   |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/drivers/net/igc/igc_ethdev.c b/drivers/net/igc/igc_ethdev.c
index b176b6e..4d7c1e0 100644
--- a/drivers/net/igc/igc_ethdev.c
+++ b/drivers/net/igc/igc_ethdev.c
@@ -50,10 +50,17 @@
 /* External VLAN Enable bit mask */
 #define IGC_CTRL_EXT_EXT_VLAN          (1u << 26)
 
+/* Speed select */
+#define IGC_CTRL_SPEED_MASK            (7u << 8)
+#define IGC_CTRL_SPEED_2500            (6u << 8)
+
 /* External VLAN Ether Type bit mask and shift */
 #define IGC_VET_EXT                    0xFFFF0000
 #define IGC_VET_EXT_SHIFT              16
 
+/* Force EEE Auto-negotiation */
+#define IGC_EEER_EEE_FRC_AN            (1u << 28)
+
 /* Per Queue Good Packets Received Count */
 #define IGC_PQGPRC(idx)                (0x10010 + 0x100 * (idx))
 /* Per Queue Good Octets Received Count */
@@ -635,6 +642,9 @@ static int eth_igc_vlan_tpid_set(struct rte_eth_dev *dev,
        /* disable all wake up */
        IGC_WRITE_REG(hw, IGC_WUC, 0);
 
+       /* disable checking EEE operation in MAC loopback mode */
+       igc_read_reg_check_clear_bits(hw, IGC_EEER, IGC_EEER_EEE_FRC_AN);
+
        /* Set bit for Go Link disconnect */
        igc_read_reg_check_set_bits(hw, IGC_82580_PHY_POWER_MGMT,
                        IGC_82580_PM_GO_LINKD);
@@ -1059,6 +1069,19 @@ static int eth_igc_vlan_tpid_set(struct rte_eth_dev *dev,
        eth_igc_rxtx_control(dev, true);
        eth_igc_link_update(dev, 0);
 
+       /* configure MAC-loopback mode */
+       if (dev->data->dev_conf.lpbk_mode == 1) {
+               uint32_t reg_val;
+
+               reg_val = IGC_READ_REG(hw, IGC_CTRL);
+               reg_val &= ~IGC_CTRL_SPEED_MASK;
+               reg_val |= IGC_CTRL_SLU | IGC_CTRL_FRCSPD |
+                       IGC_CTRL_FRCDPX | IGC_CTRL_FD | IGC_CTRL_SPEED_2500;
+               IGC_WRITE_REG(hw, IGC_CTRL, reg_val);
+
+               igc_read_reg_check_set_bits(hw, IGC_EEER, IGC_EEER_EEE_FRC_AN);
+       }
+
        return 0;
 
 error_invalid_config:
diff --git a/drivers/net/igc/igc_txrx.c b/drivers/net/igc/igc_txrx.c
index 177dd11..ceb5537 100644
--- a/drivers/net/igc/igc_txrx.c
+++ b/drivers/net/igc/igc_txrx.c
@@ -1140,6 +1140,9 @@ int eth_igc_rx_descriptor_status(void *rx_queue, uint16_t 
offset)
                        IGC_RCTL_DPF |
                        (hw->mac.mc_filter_type << IGC_RCTL_MO_SHIFT);
 
+       if (dev->data->dev_conf.lpbk_mode == 1)
+               rctl |= IGC_RCTL_LBM_MAC;
+
        rctl &= ~(IGC_RCTL_HSEL_MSK | IGC_RCTL_CFIEN | IGC_RCTL_CFI |
                        IGC_RCTL_PSP | IGC_RCTL_PMCF);
 
-- 
1.8.3.1