summaryrefslogtreecommitdiffstats
path: root/drivers/net/8139cp.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/8139cp.c')
-rw-r--r--drivers/net/8139cp.c125
1 files changed, 82 insertions, 43 deletions
diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c
index d639cb8dc46..7b293f01c9e 100644
--- a/drivers/net/8139cp.c
+++ b/drivers/net/8139cp.c
@@ -54,12 +54,14 @@
#include <linux/config.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/pci.h>
+#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
@@ -91,16 +93,17 @@ 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 +189,9 @@ 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 +318,7 @@ struct cp_desc {
struct ring_info {
struct sk_buff *skb;
dma_addr_t mapping;
- unsigned frag;
+ u32 len;
};
struct cp_dma_stats {
@@ -394,6 +400,9 @@ 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,
@@ -587,7 +596,7 @@ rx_status_loop:
mapping =
cp->rx_skb[rx_tail].mapping =
- pci_map_single(cp->pdev, new_skb->tail,
+ pci_map_single(cp->pdev, new_skb->data,
buflen, PCI_DMA_FROMDEVICE);
cp->rx_skb[rx_tail].skb = new_skb;
@@ -688,6 +697,19 @@ 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 +729,7 @@ 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 +771,11 @@ 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 +795,9 @@ 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 +809,26 @@ 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 +846,7 @@ 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 +862,19 @@ 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 +889,7 @@ 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);
}
@@ -1072,9 +1101,8 @@ static int cp_refill_rx (struct cp_private *cp)
skb_reserve(skb, RX_OFFSET);
cp->rx_skb[i].mapping = pci_map_single(cp->pdev,
- skb->tail, cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ skb->data, 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 +1154,6 @@ 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 +1165,18 @@ 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);
}
@@ -1486,22 +1516,22 @@ static void cp_get_ethtool_stats (struct net_device *dev,
struct ethtool_stats *estats, u64 *tmp_stats)
{
struct cp_private *cp = netdev_priv(dev);
- unsigned int work = 100;
int i;
+ memset(cp->nic_stats, 0, sizeof(struct cp_dma_stats));
+
/* begin NIC statistics dump */
cpw32(StatsAddr + 4, (cp->nic_stats_dma >> 16) >> 16);
cpw32(StatsAddr, (cp->nic_stats_dma & 0xffffffff) | DumpStats);
cpr32(StatsAddr);
- while (work-- > 0) {
+ for (i = 0; i < 1000; i++) {
if ((cpr32(StatsAddr) & DumpStats) == 0)
break;
- cpu_relax();
+ udelay(10);
}
-
- if (cpr32(StatsAddr) & DumpStats)
- return /* -EIO */;
+ cpw32(StatsAddr, 0);
+ cpw32(StatsAddr + 4, 0);
i = 0;
tmp_stats[i++] = le64_to_cpu(cp->nic_stats->tx_ok);
@@ -1538,6 +1568,8 @@ 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,
@@ -1701,19 +1733,19 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
/* Configure DMA attributes. */
if ((sizeof(dma_addr_t) > 4) &&
- !pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL) &&
- !pci_set_dma_mask(pdev, 0xffffffffffffffffULL)) {
+ !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) &&
+ !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
pci_using_dac = 1;
} else {
pci_using_dac = 0;
- rc = pci_set_dma_mask(pdev, 0xffffffffULL);
+ rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (rc) {
printk(KERN_ERR PFX "No usable DMA configuration, "
"aborting.\n");
goto err_out_res;
}
- rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL);
+ rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
if (rc) {
printk(KERN_ERR PFX "No usable consistent DMA configuration, "
"aborting.\n");
@@ -1749,6 +1781,9 @@ 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 +1803,10 @@ 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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-29 08:34:28 +0000