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Message-Id: <20230216084413.10089-1-mengyuanlou@net-swift.com>
Date: Thu, 16 Feb 2023 16:44:13 +0800
From: Mengyuan Lou <mengyuanlou@...-swift.com>
To: netdev@...r.kernel.org
Cc: jiawenwu@...stnetic.com, Mengyuan Lou <mengyuanlou@...-swift.com>
Subject: [PATCH net-next] net: wangxun: Implement the ndo change mtu interface
Add ngbe and txgbe ndo_change_mtu support.
Signed-off-by: Mengyuan Lou <mengyuanlou@...-swift.com>
---
drivers/net/ethernet/wangxun/libwx/wx_type.h | 2 +
drivers/net/ethernet/wangxun/ngbe/ngbe_main.c | 38 ++++++++++++++++++-
drivers/net/ethernet/wangxun/ngbe/ngbe_type.h | 1 -
.../net/ethernet/wangxun/txgbe/txgbe_main.c | 38 ++++++++++++++++++-
.../net/ethernet/wangxun/txgbe/txgbe_type.h | 1 -
5 files changed, 76 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index 77d8d7f1707e..2b9efd13c500 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -300,6 +300,8 @@
#define WX_MAX_RXD 8192
#define WX_MAX_TXD 8192
+#define WX_MAX_JUMBO_FRAME_SIZE 9432 /* max payload 9414 */
+
/* Supported Rx Buffer Sizes */
#define WX_RXBUFFER_256 256 /* Used for skb receive header */
#define WX_RXBUFFER_2K 2048
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
index 5b564d348c09..78bfaff02aad 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
@@ -361,6 +361,15 @@ static void ngbe_up(struct wx *wx)
phy_start(wx->phydev);
}
+static void ngbe_reinit_locked(struct wx *wx)
+{
+ /* prevent tx timeout */
+ netif_trans_update(wx->netdev);
+ ngbe_down(wx);
+ wx_configure(wx);
+ ngbe_up(wx);
+}
+
/**
* ngbe_open - Called when a network interface is made active
* @netdev: network interface device structure
@@ -435,6 +444,32 @@ static int ngbe_close(struct net_device *netdev)
return 0;
}
+/**
+ * ngbe_change_mtu - Change the Maximum Transfer Unit
+ * @netdev: network interface device structure
+ * @new_mtu: new value for maximum frame size
+ *
+ * Returns 0 on success, negative on failure
+ **/
+static int ngbe_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
+ struct wx *wx = netdev_priv(netdev);
+
+ if (max_frame > WX_MAX_JUMBO_FRAME_SIZE)
+ return -EINVAL;
+
+ netdev_info(netdev, "Changing MTU from %d to %d.\n",
+ netdev->mtu, new_mtu);
+
+ /* must set new MTU before calling down or up */
+ netdev->mtu = new_mtu;
+ if (netif_running(netdev))
+ ngbe_reinit_locked(wx);
+
+ return 0;
+}
+
static void ngbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
{
struct wx *wx = pci_get_drvdata(pdev);
@@ -470,6 +505,7 @@ static void ngbe_shutdown(struct pci_dev *pdev)
static const struct net_device_ops ngbe_netdev_ops = {
.ndo_open = ngbe_open,
.ndo_stop = ngbe_close,
+ .ndo_change_mtu = ngbe_change_mtu,
.ndo_start_xmit = wx_xmit_frame,
.ndo_set_rx_mode = wx_set_rx_mode,
.ndo_validate_addr = eth_validate_addr,
@@ -562,7 +598,7 @@ static int ngbe_probe(struct pci_dev *pdev,
netdev->priv_flags |= IFF_SUPP_NOFCS;
netdev->min_mtu = ETH_MIN_MTU;
- netdev->max_mtu = NGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
+ netdev->max_mtu = WX_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
wx->bd_number = func_nums;
/* setup the private structure */
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h b/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
index a2351349785e..373d5af628cd 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
@@ -137,7 +137,6 @@ enum NGBE_MSCA_CMD_value {
#define NGBE_RX_PB_SIZE 42
#define NGBE_MC_TBL_SIZE 128
#define NGBE_TDB_PB_SZ (20 * 1024) /* 160KB Packet Buffer */
-#define NGBE_MAX_JUMBO_FRAME_SIZE 9432 /* max payload 9414 */
/* TX/RX descriptor defines */
#define NGBE_DEFAULT_TXD 512 /* default ring size */
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index 6c0a98230557..0b09f982a2c8 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -454,6 +454,41 @@ static int txgbe_close(struct net_device *netdev)
return 0;
}
+static void txgbe_reinit_locked(struct wx *wx)
+{
+ /* prevent tx timeout */
+ netif_trans_update(wx->netdev);
+ txgbe_down(wx);
+ wx_configure(wx);
+ txgbe_up_complete(wx);
+}
+
+/**
+ * txgbe_change_mtu - Change the Maximum Transfer Unit
+ * @netdev: network interface device structure
+ * @new_mtu: new value for maximum frame size
+ *
+ * Returns 0 on success, negative on failure
+ **/
+static int txgbe_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
+ struct wx *wx = netdev_priv(netdev);
+
+ if (max_frame > WX_MAX_JUMBO_FRAME_SIZE)
+ return -EINVAL;
+
+ netdev_info(netdev, "Changing MTU from %d to %d.\n",
+ netdev->mtu, new_mtu);
+
+ /* must set new MTU before calling down or up */
+ netdev->mtu = new_mtu;
+ if (netif_running(netdev))
+ txgbe_reinit_locked(wx);
+
+ return 0;
+}
+
static void txgbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
{
struct wx *wx = pci_get_drvdata(pdev);
@@ -487,6 +522,7 @@ static void txgbe_shutdown(struct pci_dev *pdev)
static const struct net_device_ops txgbe_netdev_ops = {
.ndo_open = txgbe_open,
.ndo_stop = txgbe_close,
+ .ndo_change_mtu = txgbe_change_mtu,
.ndo_start_xmit = wx_xmit_frame,
.ndo_set_rx_mode = wx_set_rx_mode,
.ndo_validate_addr = eth_validate_addr,
@@ -605,7 +641,7 @@ static int txgbe_probe(struct pci_dev *pdev,
netdev->priv_flags |= IFF_SUPP_NOFCS;
netdev->min_mtu = ETH_MIN_MTU;
- netdev->max_mtu = TXGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
+ netdev->max_mtu = WX_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
/* make sure the EEPROM is good */
err = txgbe_validate_eeprom_checksum(wx, NULL);
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
index 563ea51deca6..63a1c733718d 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
@@ -79,7 +79,6 @@
#define TXGBE_SP_MC_TBL_SIZE 128
#define TXGBE_SP_RX_PB_SIZE 512
#define TXGBE_SP_TDB_PB_SZ (160 * 1024) /* 160KB Packet Buffer */
-#define TXGBE_MAX_JUMBO_FRAME_SIZE 9432 /* max payload 9414 */
/* TX/RX descriptor defines */
#define TXGBE_DEFAULT_TXD 512
--
2.39.1
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