Manual merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/jga…

…rzik/netdev-2.6.git

This is a fixed-up version of the broken "upstream-2.6.13" branch, where
I re-did the manual merge of drivers/net/r8169.c by hand, and made sure
the history is all good.

Documentation/networking/generic-hdlc.txt

@@ -1,21 +1,21 @@
 Generic HDLC layer
 Krzysztof Halasa <khc@pm.waw.pl>
-January, 2003
 
 
 Generic HDLC layer currently supports:
-- Frame Relay (ANSI, CCITT and no LMI), with ARP support (no InARP).
-  Normal (routed) and Ethernet-bridged (Ethernet device emulation)
-  interfaces can share a single PVC.
-- raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
-- Cisco HDLC,
-- PPP (uses syncppp.c),
-- X.25 (uses X.25 routines).
-
-There are hardware drivers for the following cards:
-- C101 by Moxa Technologies Co., Ltd.
-- RISCom/N2 by SDL Communications Inc.
-- and others, some not in the official kernel.
+1. Frame Relay (ANSI, CCITT, Cisco and no LMI).
+   - Normal (routed) and Ethernet-bridged (Ethernet device emulation)
+     interfaces can share a single PVC.
+   - ARP support (no InARP support in the kernel - there is an
+     experimental InARP user-space daemon available on:
+     http://www.kernel.org/pub/linux/utils/net/hdlc/).
+2. raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
+3. Cisco HDLC.
+4. PPP (uses syncppp.c).
+5. X.25 (uses X.25 routines).
+
+Generic HDLC is a protocol driver only - it needs a low-level driver
+for your particular hardware.
 
 Ethernet device emulation (using HDLC or Frame-Relay PVC) is compatible
 with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
@@ -24,7 +24,7 @@ with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
 Make sure the hdlc.o and the hardware driver are loaded. It should
 create a number of "hdlc" (hdlc0 etc) network devices, one for each
 WAN port. You'll need the "sethdlc" utility, get it from:
-	http://hq.pm.waw.pl/hdlc/
+	http://www.kernel.org/pub/linux/utils/net/hdlc/
 
 Compile sethdlc.c utility:
 	gcc -O2 -Wall -o sethdlc sethdlc.c
@@ -52,12 +52,12 @@ Setting interface:
 * v35 | rs232 | x21 | t1 | e1 - sets physical interface for a given port
                                 if the card has software-selectable interfaces
   loopback - activate hardware loopback (for testing only)
-* clock ext - external clock (uses DTE RX and TX clock)
-* clock int - internal clock (provides clock signal on DCE clock output)
-* clock txint - TX internal, RX external (provides TX clock on DCE output)
-* clock txfromrx - TX clock derived from RX clock (TX clock on DCE output)
-* rate - sets clock rate in bps (not required for external clock or
-                                 for txfromrx)
+* clock ext - both RX clock and TX clock external
+* clock int - both RX clock and TX clock internal
+* clock txint - RX clock external, TX clock internal
+* clock txfromrx - RX clock external, TX clock derived from RX clock
+* rate - sets clock rate in bps (for "int" or "txint" clock only)
+
 
 Setting protocol:
 
@@ -79,7 +79,7 @@ Setting protocol:
 * x25 - sets X.25 mode
 
 * fr - Frame Relay mode
-  lmi ansi / ccitt / none - LMI (link management) type
+  lmi ansi / ccitt / cisco / none - LMI (link management) type
   dce - Frame Relay DCE (network) side LMI instead of default DTE (user).
   It has nothing to do with clocks!
   t391 - link integrity verification polling timer (in seconds) - user
@@ -119,13 +119,14 @@ or
 
 
 
-If you have a problem with N2 or C101 card, you can issue the "private"
-command to see port's packet descriptor rings (in kernel logs):
+If you have a problem with N2, C101 or PLX200SYN card, you can issue the
+"private" command to see port's packet descriptor rings (in kernel logs):
 
 	sethdlc hdlc0 private
 
-The hardware driver has to be build with CONFIG_HDLC_DEBUG_RINGS.
+The hardware driver has to be build with #define DEBUG_RINGS.
 Attaching this info to bug reports would be helpful. Anyway, let me know
 if you have problems using this.
 
-For patches and other info look at http://hq.pm.waw.pl/hdlc/
+For patches and other info look at:
+<http://www.kernel.org/pub/linux/utils/net/hdlc/>.

Documentation/networking/multicast.txt

@@ -47,7 +47,6 @@ ni52		<------------------ Buggy ------------------>
 ni65		YES		YES		YES		Software(#)
 seeq		NO		NO		NO		N/A
 sgiseek		<------------------ Buggy ------------------>
-sk_g16		NO		NO		YES		N/A
 smc-ultra	YES		YES		YES		Hardware
 sunlance	YES		YES		YES		Hardware
 tulip		YES		YES		YES		Hardware

Documentation/networking/net-modules.txt

@@ -284,9 +284,6 @@ ppp.c:
 seeq8005.c: *Not modularized*
 	(Probes ports: 0x300, 0x320, 0x340, 0x360)
 
-sk_g16.c: *Not modularized*
-	(Probes ports: 0x100, 0x180, 0x208, 0x220m 0x288, 0x320, 0x328, 0x390)
-
 skeleton.c: *Skeleton*
 
 slhc.c:

drivers/net/8139cp.c

@@ -54,6 +54,7 @@
 
 #include <linux/config.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <linux/kernel.h>
 #include <linux/compiler.h>
 #include <linux/netdevice.h>
@@ -91,16 +92,17 @@ KERN_INFO DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE
 
 MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
 MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver");
+MODULE_VERSION(DRV_VERSION);
 MODULE_LICENSE("GPL");
 
 static int debug = -1;
-MODULE_PARM (debug, "i");
+module_param(debug, int, 0);
 MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number");
 
 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
    The RTL chips use a 64 element hash table based on the Ethernet CRC.  */
 static int multicast_filter_limit = 32;
-MODULE_PARM (multicast_filter_limit, "i");
+module_param(multicast_filter_limit, int, 0);
 MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses");
 
 #define PFX			DRV_NAME ": "
@@ -186,6 +188,9 @@ enum {
 	RingEnd		= (1 << 30), /* End of descriptor ring */
 	FirstFrag	= (1 << 29), /* First segment of a packet */
 	LastFrag	= (1 << 28), /* Final segment of a packet */
+	LargeSend	= (1 << 27), /* TCP Large Send Offload (TSO) */
+	MSSShift	= 16,	     /* MSS value position */
+	MSSMask		= 0xfff,     /* MSS value: 11 bits */
 	TxError		= (1 << 23), /* Tx error summary */
 	RxError		= (1 << 20), /* Rx error summary */
 	IPCS		= (1 << 18), /* Calculate IP checksum */
@@ -312,7 +317,7 @@ struct cp_desc {
 struct ring_info {
 	struct sk_buff		*skb;
 	dma_addr_t		mapping;
-	unsigned		frag;
+	u32			len;
 };
 
 struct cp_dma_stats {
@@ -394,6 +399,9 @@ struct cp_private {
 static void __cp_set_rx_mode (struct net_device *dev);
 static void cp_tx (struct cp_private *cp);
 static void cp_clean_rings (struct cp_private *cp);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void cp_poll_controller(struct net_device *dev);
+#endif
 
 static struct pci_device_id cp_pci_tbl[] = {
 	{ PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139,
@@ -688,6 +696,19 @@ cp_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling receive - used by netconsole and other diagnostic tools
+ * to allow network i/o with interrupts disabled.
+ */
+static void cp_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	cp_interrupt(dev->irq, dev, NULL);
+	enable_irq(dev->irq);
+}
+#endif
+
 static void cp_tx (struct cp_private *cp)
 {
 	unsigned tx_head = cp->tx_head;
@@ -707,7 +728,7 @@ static void cp_tx (struct cp_private *cp)
 			BUG();
 
 		pci_unmap_single(cp->pdev, cp->tx_skb[tx_tail].mapping,
-					skb->len, PCI_DMA_TODEVICE);
+				 cp->tx_skb[tx_tail].len, PCI_DMA_TODEVICE);
 
 		if (status & LastFrag) {
 			if (status & (TxError | TxFIFOUnder)) {
@@ -749,10 +770,11 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
 {
 	struct cp_private *cp = netdev_priv(dev);
 	unsigned entry;
-	u32 eor;
+	u32 eor, flags;
 #if CP_VLAN_TAG_USED
 	u32 vlan_tag = 0;
 #endif
+	int mss = 0;
 
 	spin_lock_irq(&cp->lock);
 
@@ -772,6 +794,9 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
 
 	entry = cp->tx_head;
 	eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
+	if (dev->features & NETIF_F_TSO)
+		mss = skb_shinfo(skb)->tso_size;
+
 	if (skb_shinfo(skb)->nr_frags == 0) {
 		struct cp_desc *txd = &cp->tx_ring[entry];
 		u32 len;
@@ -783,26 +808,26 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
 		txd->addr = cpu_to_le64(mapping);
 		wmb();
 
-		if (skb->ip_summed == CHECKSUM_HW) {
+		flags = eor | len | DescOwn | FirstFrag | LastFrag;
+
+		if (mss)
+			flags |= LargeSend | ((mss & MSSMask) << MSSShift);
+		else if (skb->ip_summed == CHECKSUM_HW) {
 			const struct iphdr *ip = skb->nh.iph;
 			if (ip->protocol == IPPROTO_TCP)
-				txd->opts1 = cpu_to_le32(eor | len | DescOwn |
-							 FirstFrag | LastFrag |
-							 IPCS | TCPCS);
+				flags |= IPCS | TCPCS;
 			else if (ip->protocol == IPPROTO_UDP)
-				txd->opts1 = cpu_to_le32(eor | len | DescOwn |
-							 FirstFrag | LastFrag |
-							 IPCS | UDPCS);
+				flags |= IPCS | UDPCS;
 			else
-				BUG();
-		} else
-			txd->opts1 = cpu_to_le32(eor | len | DescOwn |
-						 FirstFrag | LastFrag);
+				WARN_ON(1);	/* we need a WARN() */
+		}
+
+		txd->opts1 = cpu_to_le32(flags);
 		wmb();
 
 		cp->tx_skb[entry].skb = skb;
 		cp->tx_skb[entry].mapping = mapping;
-		cp->tx_skb[entry].frag = 0;
+		cp->tx_skb[entry].len = len;
 		entry = NEXT_TX(entry);
 	} else {
 		struct cp_desc *txd;
@@ -820,7 +845,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
 					       first_len, PCI_DMA_TODEVICE);
 		cp->tx_skb[entry].skb = skb;
 		cp->tx_skb[entry].mapping = first_mapping;
-		cp->tx_skb[entry].frag = 1;
+		cp->tx_skb[entry].len = first_len;
 		entry = NEXT_TX(entry);
 
 		for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
@@ -836,16 +861,19 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
 						 len, PCI_DMA_TODEVICE);
 			eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
 
-			if (skb->ip_summed == CHECKSUM_HW) {
-				ctrl = eor | len | DescOwn | IPCS;
+			ctrl = eor | len | DescOwn;
+
+			if (mss)
+				ctrl |= LargeSend |
+					((mss & MSSMask) << MSSShift);
+			else if (skb->ip_summed == CHECKSUM_HW) {
 				if (ip->protocol == IPPROTO_TCP)
-					ctrl |= TCPCS;
+					ctrl |= IPCS | TCPCS;
 				else if (ip->protocol == IPPROTO_UDP)
-					ctrl |= UDPCS;
+					ctrl |= IPCS | UDPCS;
 				else
 					BUG();
-			} else
-				ctrl = eor | len | DescOwn;
+			}
 
 			if (frag == skb_shinfo(skb)->nr_frags - 1)
 				ctrl |= LastFrag;
@@ -860,7 +888,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
 
 			cp->tx_skb[entry].skb = skb;
 			cp->tx_skb[entry].mapping = mapping;
-			cp->tx_skb[entry].frag = frag + 2;
+			cp->tx_skb[entry].len = len;
 			entry = NEXT_TX(entry);
 		}
 
@@ -1074,7 +1102,6 @@ static int cp_refill_rx (struct cp_private *cp)
 		cp->rx_skb[i].mapping = pci_map_single(cp->pdev,
 			skb->tail, cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
 		cp->rx_skb[i].skb = skb;
-		cp->rx_skb[i].frag = 0;
 
 		cp->rx_ring[i].opts2 = 0;
 		cp->rx_ring[i].addr = cpu_to_le64(cp->rx_skb[i].mapping);
@@ -1126,9 +1153,6 @@ static void cp_clean_rings (struct cp_private *cp)
 {
 	unsigned i;
 
-	memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
-	memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
-
 	for (i = 0; i < CP_RX_RING_SIZE; i++) {
 		if (cp->rx_skb[i].skb) {
 			pci_unmap_single(cp->pdev, cp->rx_skb[i].mapping,
@@ -1140,13 +1164,18 @@ static void cp_clean_rings (struct cp_private *cp)
 	for (i = 0; i < CP_TX_RING_SIZE; i++) {
 		if (cp->tx_skb[i].skb) {
 			struct sk_buff *skb = cp->tx_skb[i].skb;
+
 			pci_unmap_single(cp->pdev, cp->tx_skb[i].mapping,
-					 skb->len, PCI_DMA_TODEVICE);
-			dev_kfree_skb(skb);
+				 	 cp->tx_skb[i].len, PCI_DMA_TODEVICE);
+			if (le32_to_cpu(cp->tx_ring[i].opts1) & LastFrag)
+				dev_kfree_skb(skb);
 			cp->net_stats.tx_dropped++;
 		}
 	}
 
+	memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
+	memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
+
 	memset(&cp->rx_skb, 0, sizeof(struct ring_info) * CP_RX_RING_SIZE);
 	memset(&cp->tx_skb, 0, sizeof(struct ring_info) * CP_TX_RING_SIZE);
 }
@@ -1538,6 +1567,8 @@ static struct ethtool_ops cp_ethtool_ops = {
 	.set_tx_csum		= ethtool_op_set_tx_csum, /* local! */
 	.get_sg			= ethtool_op_get_sg,
 	.set_sg			= ethtool_op_set_sg,
+	.get_tso		= ethtool_op_get_tso,
+	.set_tso		= ethtool_op_set_tso,
 	.get_regs		= cp_get_regs,
 	.get_wol		= cp_get_wol,
 	.set_wol		= cp_set_wol,
@@ -1749,6 +1780,9 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	dev->get_stats = cp_get_stats;
 	dev->do_ioctl = cp_ioctl;
 	dev->poll = cp_rx_poll;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	dev->poll_controller = cp_poll_controller;
+#endif
 	dev->weight = 16;	/* arbitrary? from NAPI_HOWTO.txt. */
 #ifdef BROKEN
 	dev->change_mtu = cp_change_mtu;
@@ -1768,6 +1802,10 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (pci_using_dac)
 		dev->features |= NETIF_F_HIGHDMA;
 
+#if 0 /* disabled by default until verified */
+	dev->features |= NETIF_F_TSO;
+#endif
+
 	dev->irq = pdev->irq;
 
 	rc = register_netdev(dev);