* cause DMA to kfree'd memory.
* 0.31: 14 Nov 2004: ethtool support for getting/setting link
* capabilities.
+ * 0.32: 16 Apr 2005: RX_ERROR4 handling added.
*
* Known bugs:
* We suspect that on some hardware no TX done interrupts are generated.
* DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few
* superfluous timer interrupts from the nic.
*/
-#define FORCEDETH_VERSION "0.31"
+#define FORCEDETH_VERSION "0.32"
#define DRV_NAME "forcedeth"
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/random.h>
#include <linux/init.h>
+#include <linux/if_vlan.h>
#include <asm/irq.h>
#include <asm/io.h>
spin_unlock_irq(&np->lock);
}
+/*
+ * Called when the nic notices a mismatch between the actual data len on the
+ * wire and the len indicated in the 802 header
+ */
+static int nv_getlen(struct net_device *dev, void *packet, int datalen)
+{
+ int hdrlen; /* length of the 802 header */
+ int protolen; /* length as stored in the proto field */
+
+ /* 1) calculate len according to header */
+ if ( ((struct vlan_ethhdr *)packet)->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
+ protolen = ntohs( ((struct vlan_ethhdr *)packet)->h_vlan_encapsulated_proto );
+ hdrlen = VLAN_HLEN;
+ } else {
+ protolen = ntohs( ((struct ethhdr *)packet)->h_proto);
+ hdrlen = ETH_HLEN;
+ }
+ dprintk(KERN_DEBUG "%s: nv_getlen: datalen %d, protolen %d, hdrlen %d\n",
+ dev->name, datalen, protolen, hdrlen);
+ if (protolen > ETH_DATA_LEN)
+ return datalen; /* Value in proto field not a len, no checks possible */
+
+ protolen += hdrlen;
+ /* consistency checks: */
+ if (datalen > ETH_ZLEN) {
+ if (datalen >= protolen) {
+ /* more data on wire than in 802 header, trim of
+ * additional data.
+ */
+ dprintk(KERN_DEBUG "%s: nv_getlen: accepting %d bytes.\n",
+ dev->name, protolen);
+ return protolen;
+ } else {
+ /* less data on wire than mentioned in header.
+ * Discard the packet.
+ */
+ dprintk(KERN_DEBUG "%s: nv_getlen: discarding long packet.\n",
+ dev->name);
+ return -1;
+ }
+ } else {
+ /* short packet. Accept only if 802 values are also short */
+ if (protolen > ETH_ZLEN) {
+ dprintk(KERN_DEBUG "%s: nv_getlen: discarding short packet.\n",
+ dev->name);
+ return -1;
+ }
+ dprintk(KERN_DEBUG "%s: nv_getlen: accepting %d bytes.\n",
+ dev->name, datalen);
+ return datalen;
+ }
+}
+
static void nv_rx_process(struct net_device *dev)
{
struct fe_priv *np = get_nvpriv(dev);
np->stats.rx_errors++;
goto next_pkt;
}
- if (Flags & (NV_RX_ERROR1|NV_RX_ERROR2|NV_RX_ERROR3|NV_RX_ERROR4)) {
+ if (Flags & (NV_RX_ERROR1|NV_RX_ERROR2|NV_RX_ERROR3)) {
np->stats.rx_errors++;
goto next_pkt;
}
np->stats.rx_errors++;
goto next_pkt;
}
- if (Flags & NV_RX_ERROR) {
- /* framing errors are soft errors, the rest is fatal. */
- if (Flags & NV_RX_FRAMINGERR) {
- if (Flags & NV_RX_SUBSTRACT1) {
- len--;
- }
- } else {
+ if (Flags & NV_RX_ERROR4) {
+ len = nv_getlen(dev, np->rx_skbuff[i]->data, len);
+ if (len < 0) {
np->stats.rx_errors++;
goto next_pkt;
}
}
+ /* framing errors are soft errors. */
+ if (Flags & NV_RX_FRAMINGERR) {
+ if (Flags & NV_RX_SUBSTRACT1) {
+ len--;
+ }
+ }
} else {
if (!(Flags & NV_RX2_DESCRIPTORVALID))
goto next_pkt;
- if (Flags & (NV_RX2_ERROR1|NV_RX2_ERROR2|NV_RX2_ERROR3|NV_RX2_ERROR4)) {
+ if (Flags & (NV_RX2_ERROR1|NV_RX2_ERROR2|NV_RX2_ERROR3)) {
np->stats.rx_errors++;
goto next_pkt;
}
np->stats.rx_errors++;
goto next_pkt;
}
- if (Flags & NV_RX2_ERROR) {
- /* framing errors are soft errors, the rest is fatal. */
- if (Flags & NV_RX2_FRAMINGERR) {
- if (Flags & NV_RX2_SUBSTRACT1) {
- len--;
- }
- } else {
+ if (Flags & NV_RX2_ERROR4) {
+ len = nv_getlen(dev, np->rx_skbuff[i]->data, len);
+ if (len < 0) {
np->stats.rx_errors++;
goto next_pkt;
}
}
+ /* framing errors are soft errors */
+ if (Flags & NV_RX2_FRAMINGERR) {
+ if (Flags & NV_RX2_SUBSTRACT1) {
+ len--;
+ }
+ }
Flags &= NV_RX2_CHECKSUMMASK;
if (Flags == NV_RX2_CHECKSUMOK1 ||
Flags == NV_RX2_CHECKSUMOK2 ||
enable_irq(dev->irq);
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void nv_poll_controller(struct net_device *dev)
+{
+ nv_do_nic_poll((unsigned long) dev);
+}
+#endif
+
static void nv_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct fe_priv *np = get_nvpriv(dev);
dev->get_stats = nv_get_stats;
dev->change_mtu = nv_change_mtu;
dev->set_multicast_list = nv_set_multicast;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = nv_poll_controller;
+#endif
SET_ETHTOOL_OPS(dev, &ops);
dev->tx_timeout = nv_tx_timeout;
dev->watchdog_timeo = NV_WATCHDOG_TIMEO;
git://git.onelab.eu / linux-2.6.git / blobdiff