amd-xgbe: Check for Tx hardware queue flushing support

The flushing of the Tx hardware queues is only supported at a certain
level of the hardware.  Retrieve the current version of the hardware
and use that to determine if flushing is supported.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index edaca44..e43747a 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -1633,6 +1633,9 @@ static int xgbe_flush_tx_queues(struct xgbe_prv_data *pdata)
 {
        unsigned int i, count;
 
+       if (XGMAC_GET_BITS(pdata->hw_feat.version, MAC_VR, SNPSVER) < 0x21)
+               return 0;
+
        for (i = 0; i < pdata->tx_q_count; i++)
                XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, FTQ, 1);
 

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index dc84f71..b26d758 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -361,6 +361,8 @@ void xgbe_get_all_hw_features(struct xgbe_prv_data *pdata)
 
        memset(hw_feat, 0, sizeof(*hw_feat));
 
+       hw_feat->version = XGMAC_IOREAD(pdata, MAC_VR);
+
        /* Hardware feature register 0 */
        hw_feat->gmii        = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, GMIISEL);
        hw_feat->vlhash      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VLHASH);

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
index a076aca..46f6130 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
@@ -361,15 +361,16 @@ static void xgbe_get_drvinfo(struct net_device *netdev,
                             struct ethtool_drvinfo *drvinfo)
 {
        struct xgbe_prv_data *pdata = netdev_priv(netdev);
+       struct xgbe_hw_features *hw_feat = &pdata->hw_feat;
 
        strlcpy(drvinfo->driver, XGBE_DRV_NAME, sizeof(drvinfo->driver));
        strlcpy(drvinfo->version, XGBE_DRV_VERSION, sizeof(drvinfo->version));
        strlcpy(drvinfo->bus_info, dev_name(pdata->dev),
                sizeof(drvinfo->bus_info));
        snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d.%d.%d",
-                XGMAC_IOREAD_BITS(pdata, MAC_VR, USERVER),
-                XGMAC_IOREAD_BITS(pdata, MAC_VR, DEVID),
-                XGMAC_IOREAD_BITS(pdata, MAC_VR, SNPSVER));
+                XGMAC_GET_BITS(hw_feat->version, MAC_VR, USERVER),
+                XGMAC_GET_BITS(hw_feat->version, MAC_VR, DEVID),
+                XGMAC_GET_BITS(hw_feat->version, MAC_VR, SNPSVER));
        drvinfo->n_stats = XGBE_STATS_COUNT;
 }
 

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index 07bf70a..5af5c38 100644 (file)
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -526,6 +526,9 @@ struct xgbe_desc_if {
  * or configurations are present in the device.
  */
 struct xgbe_hw_features {
+       /* HW Version */
+       unsigned int version;
+
        /* HW Feature Register0 */
        unsigned int gmii;              /* 1000 Mbps support */
        unsigned int vlhash;            /* VLAN Hash Filter */