[PATCH net v1 1/4] amd-xgbe: Check for Tx hardware queue flushing support
From: Tom Lendacky <thomas.lendacky@amd.com>
Date: 2014-08-29 18:16:55
Subsystem:
amd xgbe driver, networking drivers, the rest · Maintainers:
Raju Rangoju, Prashanth Kumar K R, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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> --- drivers/net/ethernet/amd/xgbe/xgbe-dev.c | 3 +++ drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 2 ++ drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 7 ++++--- drivers/net/ethernet/amd/xgbe/xgbe.h | 3 +++ 4 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index edaca44..e43747a 100644
--- 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
--- 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
--- 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
--- 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 */