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Date: Fri, 17 Oct 2008 19:47:51 +0200
From: Martin Capitanio <c4p7n@...itanio.org>
To: Francois Romieu <romieu@...zoreil.com>
Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
jeff@...zik.org, Edward Hsu <edward_hsu@...ltek.com.tw>,
Ivan Vecera <ivecera@...hat.com>,
Petr Vandrovec <petr@...drovec.name>,
Plamen Petrov <pvp-lsts@...ru.acad.bg>,
"J.A." Magallón <jamagallon@....com>
Subject: Re: [PATCH 2/2] r8169: checks against wrong mac addresse init
On Thu, 2008-10-16 at 23:48 +0200, Francois Romieu wrote:
> Checking the signature of the eeprom and the validity of the
> MAC address should be enough to filter out the bad addresses
> observed so far.
>
> Contributed by Ivan Vecera and Martin Capitanio.
-Tested on 8102el, 8168b and 8169 for a start.
+Tested on 8102e, 8168b and 8169 for a start.
XID 34a00000
Please take a look at the realtek r8101_n aka RealTek RTL8101E,
RTL8102E(L) code. Only CFG_METHOD_1, CFG_METHOD_2
and #(ioaddr, 0x00) == 0x8128 are here allowed to EEPROM access.
Thanks,
Martin
static void
rtl8101_get_mac_version(struct rtl8101_private *tp,
void __iomem *ioaddr)
{
u32 reg,val32;
u32 ICVerID;
val32 = RTL_R32(TxConfig);
reg = val32 & 0x7c800000;
ICVerID = val32 & 0x00700000;
switch (reg) {
case 0x34000000:
if (ICVerID == 0x00000000)
tp->mcfg = CFG_METHOD_1;
else if (ICVerID == 0x00200000)
tp->mcfg = CFG_METHOD_2;
else if (ICVerID == 0x00300000)
tp->mcfg = CFG_METHOD_6;
else
tp->mcfg = CFG_METHOD_6;
break;
case 0x34800000: //RTL8102E
case 0x24800000: //RTL8102EL
if (ICVerID == 0x00000000)
tp->mcfg = CFG_METHOD_3;
else if (ICVerID == 0x00100000)
tp->mcfg = CFG_METHOD_4;
else if (ICVerID == 0x00200000)
tp->mcfg = CFG_METHOD_5;
else
tp->mcfg = CFG_METHOD_5;
break;
default:
tp->mcfg = 0;
printk("unknown chip version (%x)\n",reg);
break;
}
}
static void
rtl8101_check_eeprom(struct rtl8101_private *tp)
{
void __iomem *ioaddr = tp->mmio_addr;
u32 mac_addr_1 = 0;
u32 mac_addr_2 = 0;
if ((tp->mcfg != CFG_METHOD_1) && (tp->mcfg != CFG_METHOD_2))
return;
if (rtl_eeprom_read_sc(ioaddr, 0x00) != 0x8128)
return;
RTL_W8(Cfg9346, Cfg9346_Unlock);
RTL_W8(Config5, RTL_R8(Config5) & ~UWF);
RTL_W8(Cfg9346, Cfg9346_Lock);
rtl_eeprom_write_sc(ioaddr, 0x00, 0x8129);
RTL_W8(Cfg9346, Cfg9346_EEM0);
mdelay(15);
rtl_eeprom_write_sc(ioaddr, 0x00, 0x8128);
mac_addr_1 = rtl_eeprom_read_sc(ioaddr, 0x08);
mac_addr_1 = mac_addr_1 << 16;
mac_addr_2 = rtl_eeprom_read_sc(ioaddr, 0x07);
mac_addr_1 |= mac_addr_2;
RTL_W8(Cfg9346, Cfg9346_Unlock);
RTL_W32(MAC0, mac_addr_1);
RTL_W8(Cfg9346, Cfg9346_Lock);
mac_addr_1 = 0;
mac_addr_1 = rtl_eeprom_read_sc(ioaddr, 0x09);
RTL_W8(Cfg9346, Cfg9346_Unlock);
RTL_W32(MAC4, mac_addr_1);
RTL_W8(Cfg9346, Cfg9346_Lock);
}
>
> Signed-off-by: Francois Romieu <romieu@...zoreil.com>
> Cc: Edward Hsu <edward_hsu@...ltek.com.tw>
> ---
> drivers/net/r8169.c | 22 ++++++++++++++++++----
> 1 files changed, 18 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
> index cd9a215..2b4e975 100644
> --- a/drivers/net/r8169.c
> +++ b/drivers/net/r8169.c
> @@ -81,6 +81,10 @@ static const int multicast_filter_limit = 32;
> #define RTL8169_TX_TIMEOUT (6*HZ)
> #define RTL8169_PHY_TIMEOUT (10*HZ)
>
> +#define RTL_EEPROM_SIG cpu_to_le32(0x8129)
> +#define RTL_EEPROM_SIG_MASK cpu_to_le32(0xffff)
> +#define RTL_EEPROM_SIG_ADDR 0x0000
> +
> /* write/read MMIO register */
> #define RTL_W8(reg, val8) writeb ((val8), ioaddr + (reg))
> #define RTL_W16(reg, val16) writew ((val16), ioaddr + (reg))
> @@ -1944,9 +1948,10 @@ static void rtl_init_mac_address(struct rtl8169_private *tp,
> void __iomem *ioaddr)
> {
> struct pci_dev *pdev = tp->pci_dev;
> - u8 cfg1;
> int vpd_cap;
> + __le32 sig;
> u8 mac[8];
> + u8 cfg1;
>
> cfg1 = RTL_R8(Config1);
> if (!(cfg1 & VPD)) {
> @@ -1961,7 +1966,16 @@ static void rtl_init_mac_address(struct rtl8169_private *tp,
> if (!vpd_cap)
> return;
>
> - /* MAC address is stored in EEPROM at offset 0x0e
> + if (rtl_eeprom_read(pdev, vpd_cap, RTL_EEPROM_SIG_ADDR, &sig) < 0)
> + return;
> +
> + if ((sig & RTL_EEPROM_SIG_MASK) != RTL_EEPROM_SIG) {
> + dev_info(&pdev->dev, "Missing EEPROM signature: %08x\n", sig);
> + return;
> + }
> +
> + /*
> + * MAC address is stored in EEPROM at offset 0x0e
> * Realtek says: "The VPD address does not have to be a DWORD-aligned
> * address as defined in the PCI 2.2 Specifications, but the VPD data
> * is always consecutive 4-byte data starting from the VPD address
> @@ -1983,8 +1997,8 @@ static void rtl_init_mac_address(struct rtl8169_private *tp,
> print_mac(buf, mac));
> }
>
> - /* Write MAC address */
> - rtl_rar_set(tp, mac);
> + if (is_valid_ether_addr(mac))
> + rtl_rar_set(tp, mac);
> }
>
> static int __devinit
--
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