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path: root/drivers/net/ethernet
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-rw-r--r--drivers/net/ethernet/realtek/r8169.c157
1 files changed, 145 insertions, 12 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index e5a0bdbfbb2b..51c78ce27b37 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -27,6 +27,8 @@
#include <linux/firmware.h>
#include <linux/pci-aspm.h>
#include <linux/prefetch.h>
+#include <linux/ipv6.h>
+#include <net/ip6_checksum.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -628,11 +630,16 @@ enum rtl_tx_desc_bit_0 {
enum rtl_tx_desc_bit_1 {
/* First doubleword. */
TD1_GTSENV4 = (1 << 26), /* Giant Send for IPv4 */
+ TD1_GTSENV6 = (1 << 25), /* Giant Send for IPv6 */
#define GTTCPHO_SHIFT 18
+#define GTTCPHO_MAX 0x7fU
/* Second doubleword. */
+#define TCPHO_SHIFT 18
+#define TCPHO_MAX 0x3ffU
#define TD1_MSS_SHIFT 18 /* MSS position (11 bits) */
- TD1_IP_CS = (1 << 29), /* Calculate IP checksum */
+ TD1_IPv6_CS = (1 << 28), /* Calculate IPv6 checksum */
+ TD1_IPv4_CS = (1 << 29), /* Calculate IPv4 checksum */
TD1_TCP_CS = (1 << 30), /* Calculate TCP/IP checksum */
TD1_UDP_CS = (1 << 31), /* Calculate UDP/IP checksum */
};
@@ -5920,6 +5927,82 @@ static bool rtl_test_hw_pad_bug(struct rtl8169_private *tp, struct sk_buff *skb)
return skb->len < ETH_ZLEN && tp->mac_version == RTL_GIGA_MAC_VER_34;
}
+static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
+ struct net_device *dev);
+/* r8169_csum_workaround()
+ * The hw limites the value the transport offset. When the offset is out of the
+ * range, calculate the checksum by sw.
+ */
+static void r8169_csum_workaround(struct rtl8169_private *tp,
+ struct sk_buff *skb)
+{
+ if (skb_shinfo(skb)->gso_size) {
+ netdev_features_t features = tp->dev->features;
+ struct sk_buff *segs, *nskb;
+
+ features &= ~(NETIF_F_SG | NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
+ segs = skb_gso_segment(skb, features);
+ if (IS_ERR(segs) || !segs)
+ goto drop;
+
+ do {
+ nskb = segs;
+ segs = segs->next;
+ nskb->next = NULL;
+ rtl8169_start_xmit(nskb, tp->dev);
+ } while (segs);
+
+ dev_kfree_skb(skb);
+ } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ if (skb_checksum_help(skb) < 0)
+ goto drop;
+
+ rtl8169_start_xmit(skb, tp->dev);
+ } else {
+ struct net_device_stats *stats;
+
+drop:
+ stats = &tp->dev->stats;
+ stats->tx_dropped++;
+ dev_kfree_skb(skb);
+ }
+}
+
+/* msdn_giant_send_check()
+ * According to the document of microsoft, the TCP Pseudo Header excludes the
+ * packet length for IPv6 TCP large packets.
+ */
+static int msdn_giant_send_check(struct sk_buff *skb)
+{
+ const struct ipv6hdr *ipv6h;
+ struct tcphdr *th;
+ int ret;
+
+ ret = skb_cow_head(skb, 0);
+ if (ret)
+ return ret;
+
+ ipv6h = ipv6_hdr(skb);
+ th = tcp_hdr(skb);
+
+ th->check = 0;
+ th->check = ~tcp_v6_check(0, &ipv6h->saddr, &ipv6h->daddr, 0);
+
+ return ret;
+}
+
+static inline __be16 get_protocol(struct sk_buff *skb)
+{
+ __be16 protocol;
+
+ if (skb->protocol == htons(ETH_P_8021Q))
+ protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
+ else
+ protocol = skb->protocol;
+
+ return protocol;
+}
+
static bool rtl8169_tso_csum_v1(struct rtl8169_private *tp,
struct sk_buff *skb, u32 *opts)
{
@@ -5949,21 +6032,69 @@ static bool rtl8169_tso_csum_v2(struct rtl8169_private *tp,
u32 mss = skb_shinfo(skb)->gso_size;
if (mss) {
- opts[0] |= TD1_GTSENV4;
+ if (transport_offset > GTTCPHO_MAX) {
+ netif_warn(tp, tx_err, tp->dev,
+ "Invalid transport offset 0x%x for TSO\n",
+ transport_offset);
+ return false;
+ }
+
+ switch (get_protocol(skb)) {
+ case htons(ETH_P_IP):
+ opts[0] |= TD1_GTSENV4;
+ break;
+
+ case htons(ETH_P_IPV6):
+ if (msdn_giant_send_check(skb))
+ return false;
+
+ opts[0] |= TD1_GTSENV6;
+ break;
+
+ default:
+ WARN_ON_ONCE(1);
+ break;
+ }
+
opts[0] |= transport_offset << GTTCPHO_SHIFT;
opts[1] |= min(mss, TD_MSS_MAX) << TD1_MSS_SHIFT;
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
- const struct iphdr *ip = ip_hdr(skb);
+ u8 ip_protocol;
if (unlikely(rtl_test_hw_pad_bug(tp, skb)))
return skb_checksum_help(skb) == 0 && rtl_skb_pad(skb);
- if (ip->protocol == IPPROTO_TCP)
- opts[1] |= TD1_IP_CS | TD1_TCP_CS;
- else if (ip->protocol == IPPROTO_UDP)
- opts[1] |= TD1_IP_CS | TD1_UDP_CS;
+ if (transport_offset > TCPHO_MAX) {
+ netif_warn(tp, tx_err, tp->dev,
+ "Invalid transport offset 0x%x\n",
+ transport_offset);
+ return false;
+ }
+
+ switch (get_protocol(skb)) {
+ case htons(ETH_P_IP):
+ opts[1] |= TD1_IPv4_CS;
+ ip_protocol = ip_hdr(skb)->protocol;
+ break;
+
+ case htons(ETH_P_IPV6):
+ opts[1] |= TD1_IPv6_CS;
+ ip_protocol = ipv6_hdr(skb)->nexthdr;
+ break;
+
+ default:
+ ip_protocol = IPPROTO_RAW;
+ break;
+ }
+
+ if (ip_protocol == IPPROTO_TCP)
+ opts[1] |= TD1_TCP_CS;
+ else if (ip_protocol == IPPROTO_UDP)
+ opts[1] |= TD1_UDP_CS;
else
WARN_ON_ONCE(1);
+
+ opts[1] |= transport_offset << TCPHO_SHIFT;
} else {
if (unlikely(rtl_test_hw_pad_bug(tp, skb)))
return rtl_skb_pad(skb);
@@ -5996,8 +6127,10 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
opts[1] = cpu_to_le32(rtl8169_tx_vlan_tag(skb));
opts[0] = DescOwn;
- if (!tp->tso_csum(tp, skb, opts))
- goto err_update_stats;
+ if (!tp->tso_csum(tp, skb, opts)) {
+ r8169_csum_workaround(tp, skb);
+ return NETDEV_TX_OK;
+ }
len = skb_headlen(skb);
mapping = dma_map_single(d, skb->data, len, DMA_TO_DEVICE);
@@ -6062,7 +6195,6 @@ err_dma_1:
rtl8169_unmap_tx_skb(d, tp->tx_skb + entry, txd);
err_dma_0:
dev_kfree_skb_any(skb);
-err_update_stats:
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
@@ -7149,9 +7281,10 @@ rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (tp->txd_version == RTL_TD_0)
tp->tso_csum = rtl8169_tso_csum_v1;
- else if (tp->txd_version == RTL_TD_1)
+ else if (tp->txd_version == RTL_TD_1) {
tp->tso_csum = rtl8169_tso_csum_v2;
- else
+ dev->hw_features |= NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
+ } else
WARN_ON_ONCE(1);
dev->hw_features |= NETIF_F_RXALL;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 19:14:29 +0000