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-rw-r--r--drivers/net/ethernet/freescale/fec.h10
-rw-r--r--drivers/net/ethernet/freescale/fec_main.c100
2 files changed, 106 insertions, 4 deletions
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index eb4372962839..d44f65bac1d4 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -52,6 +52,7 @@
#define FEC_R_FIFO_RSEM 0x194 /* Receive FIFO section empty threshold */
#define FEC_R_FIFO_RAEM 0x198 /* Receive FIFO almost empty threshold */
#define FEC_R_FIFO_RAFL 0x19c /* Receive FIFO almost full threshold */
+#define FEC_RACC 0x1C4 /* Receive Accelerator function */
#define FEC_MIIGSK_CFGR 0x300 /* MIIGSK Configuration reg */
#define FEC_MIIGSK_ENR 0x308 /* MIIGSK Enable reg */
@@ -164,9 +165,11 @@ struct bufdesc_ex {
#define BD_ENET_TX_CSL ((ushort)0x0001)
#define BD_ENET_TX_STATS ((ushort)0x03ff) /* All status bits */
-/*enhanced buffer desciptor control/status used by Ethernet transmit*/
+/*enhanced buffer descriptor control/status used by Ethernet transmit*/
#define BD_ENET_TX_INT 0x40000000
#define BD_ENET_TX_TS 0x20000000
+#define BD_ENET_TX_PINS 0x10000000
+#define BD_ENET_TX_IINS 0x08000000
/* This device has up to three irqs on some platforms */
@@ -190,6 +193,10 @@ struct bufdesc_ex {
#define BD_ENET_RX_INT 0x00800000
#define BD_ENET_RX_PTP ((ushort)0x0400)
+#define BD_ENET_RX_ICE 0x00000020
+#define BD_ENET_RX_PCR 0x00000010
+#define FLAG_RX_CSUM_ENABLED (BD_ENET_RX_ICE | BD_ENET_RX_PCR)
+#define FLAG_RX_CSUM_ERROR (BD_ENET_RX_ICE | BD_ENET_RX_PCR)
/* The FEC buffer descriptors track the ring buffers. The rx_bd_base and
* tx_bd_base always point to the base of the buffer descriptors. The
@@ -247,6 +254,7 @@ struct fec_enet_private {
int pause_flag;
struct napi_struct napi;
+ int csum_flags;
struct ptp_clock *ptp_clock;
struct ptp_clock_info ptp_caps;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 2451ab1b5a83..b9748f14ea78 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -34,6 +34,12 @@
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <net/ip.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
@@ -176,6 +182,11 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
#define PKT_MINBUF_SIZE 64
#define PKT_MAXBLR_SIZE 1520
+/* FEC receive acceleration */
+#define FEC_RACC_IPDIS (1 << 1)
+#define FEC_RACC_PRODIS (1 << 2)
+#define FEC_RACC_OPTIONS (FEC_RACC_IPDIS | FEC_RACC_PRODIS)
+
/*
* The 5270/5271/5280/5282/532x RX control register also contains maximum frame
* size bits. Other FEC hardware does not, so we need to take that into
@@ -236,6 +247,21 @@ static void *swap_buffer(void *bufaddr, int len)
return bufaddr;
}
+static int
+fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev)
+{
+ /* Only run for packets requiring a checksum. */
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ return 0;
+
+ if (unlikely(skb_cow_head(skb, 0)))
+ return -1;
+
+ *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0;
+
+ return 0;
+}
+
static netdev_tx_t
fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
@@ -248,7 +274,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
unsigned int index;
if (!fep->link) {
- /* Link is down or autonegotiation is in progress. */
+ /* Link is down or auto-negotiation is in progress. */
return NETDEV_TX_BUSY;
}
@@ -265,6 +291,12 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
return NETDEV_TX_BUSY;
}
+ /* Protocol checksum off-load for TCP and UDP. */
+ if (fec_enet_clear_csum(skb, ndev)) {
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
/* Clear all of the status flags */
status &= ~BD_ENET_TX_STATS;
@@ -321,8 +353,14 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
ebdp->cbd_esc = (BD_ENET_TX_TS | BD_ENET_TX_INT);
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
} else {
-
ebdp->cbd_esc = BD_ENET_TX_INT;
+
+ /* Enable protocol checksum flags
+ * We do not bother with the IP Checksum bits as they
+ * are done by the kernel
+ */
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ ebdp->cbd_esc |= BD_ENET_TX_PINS;
}
}
/* If this was the last BD in the ring, start at the beginning again. */
@@ -402,6 +440,7 @@ fec_restart(struct net_device *ndev, int duplex)
const struct platform_device_id *id_entry =
platform_get_device_id(fep->pdev);
int i;
+ u32 val;
u32 temp_mac[2];
u32 rcntl = OPT_FRAME_SIZE | 0x04;
u32 ecntl = 0x2; /* ETHEREN */
@@ -468,6 +507,14 @@ fec_restart(struct net_device *ndev, int duplex)
/* Set MII speed */
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
+ /* set RX checksum */
+ val = readl(fep->hwp + FEC_RACC);
+ if (fep->csum_flags & FLAG_RX_CSUM_ENABLED)
+ val |= FEC_RACC_OPTIONS;
+ else
+ val &= ~FEC_RACC_OPTIONS;
+ writel(val, fep->hwp + FEC_RACC);
+
/*
* The phy interface and speed need to get configured
* differently on enet-mac.
@@ -525,7 +572,7 @@ fec_restart(struct net_device *ndev, int duplex)
fep->phy_dev && fep->phy_dev->pause)) {
rcntl |= FEC_ENET_FCE;
- /* set FIFO thresh hold parameter to reduce overrun */
+ /* set FIFO threshold parameter to reduce overrun */
writel(FEC_ENET_RSEM_V, fep->hwp + FEC_R_FIFO_RSEM);
writel(FEC_ENET_RSFL_V, fep->hwp + FEC_R_FIFO_RSFL);
writel(FEC_ENET_RAEM_V, fep->hwp + FEC_R_FIFO_RAEM);
@@ -813,6 +860,18 @@ fec_enet_rx(struct net_device *ndev, int budget)
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
}
+ if (fep->bufdesc_ex &&
+ (fep->csum_flags & FLAG_RX_CSUM_ENABLED)) {
+ struct bufdesc_ex *ebdp =
+ (struct bufdesc_ex *)bdp;
+ if (!(ebdp->cbd_esc & FLAG_RX_CSUM_ERROR)) {
+ /* don't check it */
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ } else {
+ skb_checksum_none_assert(skb);
+ }
+ }
+
if (!skb_defer_rx_timestamp(skb))
napi_gro_receive(&fep->napi, skb);
}
@@ -1614,6 +1673,33 @@ static void fec_poll_controller(struct net_device *dev)
}
#endif
+static int fec_set_features(struct net_device *netdev,
+ netdev_features_t features)
+{
+ struct fec_enet_private *fep = netdev_priv(netdev);
+ netdev_features_t changed = features ^ netdev->features;
+
+ netdev->features = features;
+
+ /* Receive checksum has been changed */
+ if (changed & NETIF_F_RXCSUM) {
+ if (features & NETIF_F_RXCSUM)
+ fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
+ else
+ fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED;
+
+ if (netif_running(netdev)) {
+ fec_stop(netdev);
+ fec_restart(netdev, fep->phy_dev->duplex);
+ netif_wake_queue(netdev);
+ } else {
+ fec_restart(netdev, fep->phy_dev->duplex);
+ }
+ }
+
+ return 0;
+}
+
static const struct net_device_ops fec_netdev_ops = {
.ndo_open = fec_enet_open,
.ndo_stop = fec_enet_close,
@@ -1627,6 +1713,7 @@ static const struct net_device_ops fec_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = fec_poll_controller,
#endif
+ .ndo_set_features = fec_set_features,
};
/*
@@ -1668,6 +1755,13 @@ static int fec_enet_init(struct net_device *ndev)
writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK);
netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, FEC_NAPI_WEIGHT);
+ /* enable hw accelerator */
+ ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
+ | NETIF_F_RXCSUM);
+ ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
+ | NETIF_F_RXCSUM);
+ fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
+
fec_restart(ndev, 0);
return 0;
generated by cgit (git 2.34.1) at 2024-05-28 20:13:39 +0000