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path: root/drivers/net/r8169.c
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Diffstat (limited to 'drivers/net/r8169.c')
-rw-r--r--drivers/net/r8169.c90
1 files changed, 53 insertions, 37 deletions
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index dfc3573c91bb..4748c21eb72e 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -186,8 +186,13 @@ static DEFINE_PCI_DEVICE_TABLE(rtl8169_pci_tbl) = {
MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
-static int rx_copybreak = 200;
-static int use_dac = -1;
+/*
+ * we set our copybreak very high so that we don't have
+ * to allocate 16k frames all the time (see note in
+ * rtl8169_open()
+ */
+static int rx_copybreak = 16383;
+static int use_dac;
static struct {
u32 msg_enable;
} debug = { -1 };
@@ -511,8 +516,7 @@ MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
module_param(rx_copybreak, int, 0);
MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
module_param(use_dac, int, 0);
-MODULE_PARM_DESC(use_dac, "Enable PCI DAC. -1 defaults on for PCI Express only."
-" Unsafe on 32 bit PCI slot.");
+MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
module_param_named(debug, debug.msg_enable, int, 0);
MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
MODULE_LICENSE("GPL");
@@ -2755,6 +2759,7 @@ static void rtl8169_release_board(struct pci_dev *pdev, struct net_device *dev,
{
iounmap(ioaddr);
pci_release_regions(pdev);
+ pci_clear_mwi(pdev);
pci_disable_device(pdev);
free_netdev(dev);
}
@@ -2821,8 +2826,13 @@ static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)
spin_lock_irq(&tp->lock);
RTL_W8(Cfg9346, Cfg9346_Unlock);
- RTL_W32(MAC0, low);
+
RTL_W32(MAC4, high);
+ RTL_R32(MAC4);
+
+ RTL_W32(MAC0, low);
+ RTL_R32(MAC0);
+
RTL_W8(Cfg9346, Cfg9346_Lock);
spin_unlock_irq(&tp->lock);
@@ -2974,7 +2984,6 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
void __iomem *ioaddr;
unsigned int i;
int rc;
- int this_use_dac = use_dac;
if (netif_msg_drv(&debug)) {
printk(KERN_INFO "%s Gigabit Ethernet driver %s loaded\n",
@@ -3011,9 +3020,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out_free_dev_1;
}
- rc = pci_set_mwi(pdev);
- if (rc < 0)
- goto err_out_disable_2;
+ if (pci_set_mwi(pdev) < 0)
+ netif_info(tp, probe, dev, "Mem-Wr-Inval unavailable\n");
/* make sure PCI base addr 1 is MMIO */
if (!(pci_resource_flags(pdev, region) & IORESOURCE_MEM)) {
@@ -3021,7 +3029,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
"region #%d not an MMIO resource, aborting\n",
region);
rc = -ENODEV;
- goto err_out_mwi_3;
+ goto err_out_mwi_2;
}
/* check for weird/broken PCI region reporting */
@@ -3029,35 +3037,26 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
netif_err(tp, probe, dev,
"Invalid PCI region size(s), aborting\n");
rc = -ENODEV;
- goto err_out_mwi_3;
+ goto err_out_mwi_2;
}
rc = pci_request_regions(pdev, MODULENAME);
if (rc < 0) {
netif_err(tp, probe, dev, "could not request regions\n");
- goto err_out_mwi_3;
+ goto err_out_mwi_2;
}
tp->cp_cmd = PCIMulRW | RxChkSum;
- tp->pcie_cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
- if (!tp->pcie_cap)
- netif_info(tp, probe, dev, "no PCI Express capability\n");
-
- if (this_use_dac < 0)
- this_use_dac = tp->pcie_cap != 0;
-
if ((sizeof(dma_addr_t) > 4) &&
- this_use_dac &&
- !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
- netif_info(tp, probe, dev, "using 64-bit DMA\n");
+ !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) && use_dac) {
tp->cp_cmd |= PCIDAC;
dev->features |= NETIF_F_HIGHDMA;
} else {
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (rc < 0) {
netif_err(tp, probe, dev, "DMA configuration failed\n");
- goto err_out_free_res_4;
+ goto err_out_free_res_3;
}
}
@@ -3066,9 +3065,13 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (!ioaddr) {
netif_err(tp, probe, dev, "cannot remap MMIO, aborting\n");
rc = -EIO;
- goto err_out_free_res_4;
+ goto err_out_free_res_3;
}
+ tp->pcie_cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ if (!tp->pcie_cap)
+ netif_info(tp, probe, dev, "no PCI Express capability\n");
+
RTL_W16(IntrMask, 0x0000);
/* Soft reset the chip. */
@@ -3104,7 +3107,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (i == ARRAY_SIZE(rtl_chip_info)) {
dev_err(&pdev->dev,
"driver bug, MAC version not found in rtl_chip_info\n");
- goto err_out_msi_5;
+ goto err_out_msi_4;
}
tp->chipset = i;
@@ -3169,7 +3172,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
rc = register_netdev(dev);
if (rc < 0)
- goto err_out_msi_5;
+ goto err_out_msi_4;
pci_set_drvdata(pdev, dev);
@@ -3192,14 +3195,13 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
out:
return rc;
-err_out_msi_5:
+err_out_msi_4:
rtl_disable_msi(pdev, tp);
iounmap(ioaddr);
-err_out_free_res_4:
+err_out_free_res_3:
pci_release_regions(pdev);
-err_out_mwi_3:
+err_out_mwi_2:
pci_clear_mwi(pdev);
-err_out_disable_2:
pci_disable_device(pdev);
err_out_free_dev_1:
free_netdev(dev);
@@ -3224,9 +3226,13 @@ static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
}
static void rtl8169_set_rxbufsize(struct rtl8169_private *tp,
- struct net_device *dev)
+ unsigned int mtu)
{
- unsigned int max_frame = dev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
+ unsigned int max_frame = mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
+
+ if (max_frame != 16383)
+ printk(KERN_WARNING PFX "WARNING! Changing of MTU on this "
+ "NIC may lead to frame reception errors!\n");
tp->rx_buf_sz = (max_frame > RX_BUF_SIZE) ? max_frame : RX_BUF_SIZE;
}
@@ -3238,7 +3244,17 @@ static int rtl8169_open(struct net_device *dev)
int retval = -ENOMEM;
- rtl8169_set_rxbufsize(tp, dev);
+ /*
+ * Note that we use a magic value here, its wierd I know
+ * its done because, some subset of rtl8169 hardware suffers from
+ * a problem in which frames received that are longer than
+ * the size set in RxMaxSize register return garbage sizes
+ * when received. To avoid this we need to turn off filtering,
+ * which is done by setting a value of 16383 in the RxMaxSize register
+ * and allocating 16k frames to handle the largest possible rx value
+ * thats what the magic math below does.
+ */
+ rtl8169_set_rxbufsize(tp, 16383 - VLAN_ETH_HLEN - ETH_FCS_LEN);
/*
* Rx and Tx desscriptors needs 256 bytes alignment.
@@ -3891,7 +3907,7 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
rtl8169_down(dev);
- rtl8169_set_rxbufsize(tp, dev);
+ rtl8169_set_rxbufsize(tp, dev->mtu);
ret = rtl8169_init_ring(dev);
if (ret < 0)
@@ -4270,7 +4286,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
tp->cur_tx += frags + 1;
- smp_wmb();
+ wmb();
RTL_W8(TxPoll, NPQ); /* set polling bit */
@@ -4621,7 +4637,7 @@ static int rtl8169_poll(struct napi_struct *napi, int budget)
* until it does.
*/
tp->intr_mask = 0xffff;
- smp_wmb();
+ wmb();
RTL_W16(IntrMask, tp->intr_event);
}
@@ -4754,8 +4770,8 @@ static void rtl_set_rx_mode(struct net_device *dev)
mc_filter[1] = swab32(data);
}
- RTL_W32(MAR0 + 0, mc_filter[0]);
RTL_W32(MAR0 + 4, mc_filter[1]);
+ RTL_W32(MAR0 + 0, mc_filter[0]);
RTL_W32(RxConfig, tmp);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.