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path: root/drivers/net/usb/smsc95xx.c
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Diffstat (limited to 'drivers/net/usb/smsc95xx.c')
-rw-r--r--drivers/net/usb/smsc95xx.c110
1 files changed, 70 insertions, 40 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 51e2f5d7d14..5574abe29c7 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -31,7 +31,7 @@
#include "smsc95xx.h"
#define SMSC_CHIPNAME "smsc95xx"
-#define SMSC_DRIVER_VERSION "1.0.3"
+#define SMSC_DRIVER_VERSION "1.0.4"
#define HS_USB_PKT_SIZE (512)
#define FS_USB_PKT_SIZE (64)
#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
@@ -40,15 +40,16 @@
#define MAX_SINGLE_PACKET_SIZE (2048)
#define LAN95XX_EEPROM_MAGIC (0x9500)
#define EEPROM_MAC_OFFSET (0x01)
+#define DEFAULT_TX_CSUM_ENABLE (true)
#define DEFAULT_RX_CSUM_ENABLE (true)
#define SMSC95XX_INTERNAL_PHY_ID (1)
#define SMSC95XX_TX_OVERHEAD (8)
-#define FLOW_CTRL_TX (1)
-#define FLOW_CTRL_RX (2)
+#define SMSC95XX_TX_OVERHEAD_CSUM (12)
struct smsc95xx_priv {
u32 mac_cr;
spinlock_t mac_cr_lock;
+ bool use_tx_csum;
bool use_rx_csum;
};
@@ -310,9 +311,10 @@ static void smsc95xx_async_cmd_callback(struct urb *urb, struct pt_regs *regs)
{
struct usb_context *usb_context = urb->context;
struct usbnet *dev = usb_context->dev;
+ int status = urb->status;
- if (urb->status < 0)
- devwarn(dev, "async callback failed with %d", urb->status);
+ if (status < 0)
+ devwarn(dev, "async callback failed with %d", status);
complete(&usb_context->notify);
@@ -434,28 +436,6 @@ static void smsc95xx_set_multicast(struct net_device *netdev)
smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
}
-static u8 smsc95xx_resolve_flowctrl_fulldplx(u16 lcladv, u16 rmtadv)
-{
- u8 cap = 0;
-
- if (lcladv & ADVERTISE_PAUSE_CAP) {
- if (lcladv & ADVERTISE_PAUSE_ASYM) {
- if (rmtadv & LPA_PAUSE_CAP)
- cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
- else if (rmtadv & LPA_PAUSE_ASYM)
- cap = FLOW_CTRL_RX;
- } else {
- if (rmtadv & LPA_PAUSE_CAP)
- cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
- }
- } else if (lcladv & ADVERTISE_PAUSE_ASYM) {
- if ((rmtadv & LPA_PAUSE_CAP) && (rmtadv & LPA_PAUSE_ASYM))
- cap = FLOW_CTRL_TX;
- }
-
- return cap;
-}
-
static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
u16 lcladv, u16 rmtadv)
{
@@ -468,7 +448,7 @@ static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
}
if (duplex == DUPLEX_FULL) {
- u8 cap = smsc95xx_resolve_flowctrl_fulldplx(lcladv, rmtadv);
+ u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
if (cap & FLOW_CTRL_RX)
flow = 0xFFFF0002;
@@ -556,9 +536,10 @@ static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
devwarn(dev, "unexpected interrupt, intdata=0x%08X", intdata);
}
-/* Enable or disable Rx checksum offload engine */
-static int smsc95xx_set_rx_csum(struct usbnet *dev, bool enable)
+/* Enable or disable Tx & Rx checksum offload engines */
+static int smsc95xx_set_csums(struct usbnet *dev)
{
+ struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
u32 read_buf;
int ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
if (ret < 0) {
@@ -566,7 +547,12 @@ static int smsc95xx_set_rx_csum(struct usbnet *dev, bool enable)
return ret;
}
- if (enable)
+ if (pdata->use_tx_csum)
+ read_buf |= Tx_COE_EN_;
+ else
+ read_buf &= ~Tx_COE_EN_;
+
+ if (pdata->use_rx_csum)
read_buf |= Rx_COE_EN_;
else
read_buf &= ~Rx_COE_EN_;
@@ -626,7 +612,26 @@ static int smsc95xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val)
pdata->use_rx_csum = !!val;
- return smsc95xx_set_rx_csum(dev, pdata->use_rx_csum);
+ return smsc95xx_set_csums(dev);
+}
+
+static u32 smsc95xx_ethtool_get_tx_csum(struct net_device *netdev)
+{
+ struct usbnet *dev = netdev_priv(netdev);
+ struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+
+ return pdata->use_tx_csum;
+}
+
+static int smsc95xx_ethtool_set_tx_csum(struct net_device *netdev, u32 val)
+{
+ struct usbnet *dev = netdev_priv(netdev);
+ struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+
+ pdata->use_tx_csum = !!val;
+
+ ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
+ return smsc95xx_set_csums(dev);
}
static struct ethtool_ops smsc95xx_ethtool_ops = {
@@ -640,6 +645,8 @@ static struct ethtool_ops smsc95xx_ethtool_ops = {
.get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
.get_eeprom = smsc95xx_ethtool_get_eeprom,
.set_eeprom = smsc95xx_ethtool_set_eeprom,
+ .get_tx_csum = smsc95xx_ethtool_get_tx_csum,
+ .set_tx_csum = smsc95xx_ethtool_set_tx_csum,
.get_rx_csum = smsc95xx_ethtool_get_rx_csum,
.set_rx_csum = smsc95xx_ethtool_set_rx_csum,
};
@@ -757,9 +764,9 @@ static int smsc95xx_phy_initialize(struct usbnet *dev)
static int smsc95xx_reset(struct usbnet *dev)
{
struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+ struct net_device *netdev = dev->net;
u32 read_buf, write_buf, burst_cap;
int ret = 0, timeout;
- DECLARE_MAC_BUF(mac);
if (netif_msg_ifup(dev))
devdbg(dev, "entering smsc95xx_reset");
@@ -818,8 +825,7 @@ static int smsc95xx_reset(struct usbnet *dev)
return ret;
if (netif_msg_ifup(dev))
- devdbg(dev, "MAC Address: %s",
- print_mac(mac, dev->net->dev_addr));
+ devdbg(dev, "MAC Address: %pM", dev->net->dev_addr);
ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
if (ret < 0) {
@@ -970,10 +976,11 @@ static int smsc95xx_reset(struct usbnet *dev)
return ret;
}
- /* Enable or disable Rx checksum offload engine */
- ret = smsc95xx_set_rx_csum(dev, pdata->use_rx_csum);
+ /* Enable or disable checksum offload engines */
+ ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
+ ret = smsc95xx_set_csums(dev);
if (ret < 0) {
- devwarn(dev, "Failed to set Rx csum offload: %d", ret);
+ devwarn(dev, "Failed to set csum offload: %d", ret);
return ret;
}
@@ -1029,6 +1036,7 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
spin_lock_init(&pdata->mac_cr_lock);
+ pdata->use_tx_csum = DEFAULT_TX_CSUM_ENABLE;
pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE;
/* Init all registers */
@@ -1148,22 +1156,44 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
return 1;
}
+static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
+{
+ int len = skb->data - skb->head;
+ u16 high_16 = (u16)(skb->csum_offset + skb->csum_start - len);
+ u16 low_16 = (u16)(skb->csum_start - len);
+ return (high_16 << 16) | low_16;
+}
+
static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
struct sk_buff *skb, gfp_t flags)
{
+ struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+ bool csum = pdata->use_tx_csum && (skb->ip_summed == CHECKSUM_PARTIAL);
+ int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
u32 tx_cmd_a, tx_cmd_b;
- if (skb_headroom(skb) < SMSC95XX_TX_OVERHEAD) {
+ /* We do not advertise SG, so skbs should be already linearized */
+ BUG_ON(skb_shinfo(skb)->nr_frags);
+
+ if (skb_headroom(skb) < overhead) {
struct sk_buff *skb2 = skb_copy_expand(skb,
- SMSC95XX_TX_OVERHEAD, 0, flags);
+ overhead, 0, flags);
dev_kfree_skb_any(skb);
skb = skb2;
if (!skb)
return NULL;
}
+ if (csum) {
+ u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
+ skb_push(skb, 4);
+ memcpy(skb->data, &csum_preamble, 4);
+ }
+
skb_push(skb, 4);
tx_cmd_b = (u32)(skb->len - 4);
+ if (csum)
+ tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
cpu_to_le32s(&tx_cmd_b);
memcpy(skb->data, &tx_cmd_b, 4);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-24 02:26:53 +0000