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path: root/drivers/net/ethernet/realtek/r8169.c
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Diffstat (limited to 'drivers/net/ethernet/realtek/r8169.c')
-rw-r--r--drivers/net/ethernet/realtek/r8169.c247
1 files changed, 208 insertions, 39 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index be425ad5e82..9887bcb45b8 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>
@@ -538,6 +540,7 @@ enum rtl_register_content {
MagicPacket = (1 << 5), /* Wake up when receives a Magic Packet */
LinkUp = (1 << 4), /* Wake up when the cable connection is re-established */
Jumbo_En0 = (1 << 2), /* 8168 only. Reserved in the 8168b */
+ Rdy_to_L23 = (1 << 1), /* L23 Enable */
Beacon_en = (1 << 0), /* 8168 only. Reserved in the 8168b */
/* Config4 register */
@@ -626,39 +629,22 @@ enum rtl_tx_desc_bit_0 {
/* 8102e, 8168c and beyond. */
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 */
};
-static const struct rtl_tx_desc_info {
- struct {
- u32 udp;
- u32 tcp;
- } checksum;
- u16 mss_shift;
- u16 opts_offset;
-} tx_desc_info [] = {
- [RTL_TD_0] = {
- .checksum = {
- .udp = TD0_IP_CS | TD0_UDP_CS,
- .tcp = TD0_IP_CS | TD0_TCP_CS
- },
- .mss_shift = TD0_MSS_SHIFT,
- .opts_offset = 0
- },
- [RTL_TD_1] = {
- .checksum = {
- .udp = TD1_IP_CS | TD1_UDP_CS,
- .tcp = TD1_IP_CS | TD1_TCP_CS
- },
- .mss_shift = TD1_MSS_SHIFT,
- .opts_offset = 1
- }
-};
-
enum rtl_rx_desc_bit {
/* Rx private */
PID1 = (1 << 18), /* Protocol ID bit 1/2 */
@@ -782,6 +768,7 @@ struct rtl8169_private {
unsigned int (*phy_reset_pending)(struct rtl8169_private *tp);
unsigned int (*link_ok)(void __iomem *);
int (*do_ioctl)(struct rtl8169_private *tp, struct mii_ioctl_data *data, int cmd);
+ bool (*tso_csum)(struct rtl8169_private *, struct sk_buff *, u32 *);
struct {
DECLARE_BITMAP(flags, RTL_FLAG_MAX);
@@ -4239,6 +4226,8 @@ static void rtl_init_rxcfg(struct rtl8169_private *tp)
RTL_W32(RxConfig, RX128_INT_EN | RX_MULTI_EN | RX_DMA_BURST);
break;
case RTL_GIGA_MAC_VER_40:
+ RTL_W32(RxConfig, RX128_INT_EN | RX_MULTI_EN | RX_DMA_BURST | RX_EARLY_OFF);
+ break;
case RTL_GIGA_MAC_VER_41:
case RTL_GIGA_MAC_VER_42:
case RTL_GIGA_MAC_VER_43:
@@ -4897,6 +4886,21 @@ static void rtl_enable_clock_request(struct pci_dev *pdev)
PCI_EXP_LNKCTL_CLKREQ_EN);
}
+static void rtl_pcie_state_l2l3_enable(struct rtl8169_private *tp, bool enable)
+{
+ void __iomem *ioaddr = tp->mmio_addr;
+ u8 data;
+
+ data = RTL_R8(Config3);
+
+ if (enable)
+ data |= Rdy_to_L23;
+ else
+ data &= ~Rdy_to_L23;
+
+ RTL_W8(Config3, data);
+}
+
#define R8168_CPCMD_QUIRK_MASK (\
EnableBist | \
Mac_dbgo_oe | \
@@ -5246,6 +5250,7 @@ static void rtl_hw_start_8411(struct rtl8169_private *tp)
};
rtl_hw_start_8168f(tp);
+ rtl_pcie_state_l2l3_enable(tp, false);
rtl_ephy_init(tp, e_info_8168f_1, ARRAY_SIZE(e_info_8168f_1));
@@ -5284,6 +5289,8 @@ static void rtl_hw_start_8168g_1(struct rtl8169_private *tp)
rtl_w1w0_eri(tp, 0x2fc, ERIAR_MASK_0001, 0x01, 0x06, ERIAR_EXGMAC);
rtl_w1w0_eri(tp, 0x1b0, ERIAR_MASK_0011, 0x0000, 0x1000, ERIAR_EXGMAC);
+
+ rtl_pcie_state_l2l3_enable(tp, false);
}
static void rtl_hw_start_8168g_2(struct rtl8169_private *tp)
@@ -5536,6 +5543,8 @@ static void rtl_hw_start_8105e_1(struct rtl8169_private *tp)
RTL_W8(DLLPR, RTL_R8(DLLPR) | PFM_EN);
rtl_ephy_init(tp, e_info_8105e_1, ARRAY_SIZE(e_info_8105e_1));
+
+ rtl_pcie_state_l2l3_enable(tp, false);
}
static void rtl_hw_start_8105e_2(struct rtl8169_private *tp)
@@ -5571,6 +5580,8 @@ static void rtl_hw_start_8402(struct rtl8169_private *tp)
rtl_eri_write(tp, 0xc0, ERIAR_MASK_0011, 0x0000, ERIAR_EXGMAC);
rtl_eri_write(tp, 0xb8, ERIAR_MASK_0011, 0x0000, ERIAR_EXGMAC);
rtl_w1w0_eri(tp, 0x0d4, ERIAR_MASK_0011, 0x0e00, 0xff00, ERIAR_EXGMAC);
+
+ rtl_pcie_state_l2l3_enable(tp, false);
}
static void rtl_hw_start_8106(struct rtl8169_private *tp)
@@ -5583,6 +5594,8 @@ static void rtl_hw_start_8106(struct rtl8169_private *tp)
RTL_W32(MISC, (RTL_R32(MISC) | DISABLE_LAN_EN) & ~EARLY_TALLY_EN);
RTL_W8(MCU, RTL_R8(MCU) | EN_NDP | EN_OOB_RESET);
RTL_W8(DLLPR, RTL_R8(DLLPR) & ~PFM_EN);
+
+ rtl_pcie_state_l2l3_enable(tp, false);
}
static void rtl_hw_start_8101(struct net_device *dev)
@@ -5941,32 +5954,179 @@ 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 inline bool rtl8169_tso_csum(struct rtl8169_private *tp,
- struct sk_buff *skb, u32 *opts)
+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)
{
- const struct rtl_tx_desc_info *info = tx_desc_info + tp->txd_version;
u32 mss = skb_shinfo(skb)->gso_size;
- int offset = info->opts_offset;
if (mss) {
opts[0] |= TD_LSO;
- opts[offset] |= min(mss, TD_MSS_MAX) << info->mss_shift;
+ opts[0] |= min(mss, TD_MSS_MAX) << TD0_MSS_SHIFT;
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
const struct iphdr *ip = ip_hdr(skb);
+ if (ip->protocol == IPPROTO_TCP)
+ opts[0] |= TD0_IP_CS | TD0_TCP_CS;
+ else if (ip->protocol == IPPROTO_UDP)
+ opts[0] |= TD0_IP_CS | TD0_UDP_CS;
+ else
+ WARN_ON_ONCE(1);
+ }
+
+ return true;
+}
+
+static bool rtl8169_tso_csum_v2(struct rtl8169_private *tp,
+ struct sk_buff *skb, u32 *opts)
+{
+ u32 transport_offset = (u32)skb_transport_offset(skb);
+ u32 mss = skb_shinfo(skb)->gso_size;
+
+ if (mss) {
+ 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) {
+ 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[offset] |= info->checksum.tcp;
- else if (ip->protocol == IPPROTO_UDP)
- opts[offset] |= info->checksum.udp;
+ 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);
}
+
return true;
}
@@ -5994,8 +6154,10 @@ 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 (!rtl8169_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);
@@ -6060,7 +6222,6 @@ 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;
@@ -7145,6 +7306,14 @@ rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
/* 8110SCd requires hardware Rx VLAN - disallow toggling */
dev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
+ if (tp->txd_version == RTL_TD_0)
+ tp->tso_csum = rtl8169_tso_csum_v1;
+ else if (tp->txd_version == RTL_TD_1) {
+ tp->tso_csum = rtl8169_tso_csum_v2;
+ dev->hw_features |= NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
+ } else
+ WARN_ON_ONCE(1);
+
dev->hw_features |= NETIF_F_RXALL;
dev->hw_features |= NETIF_F_RXFCS;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-24 23:39:49 +0000