r8169 : MAC address change fix for the 8168e-vl.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=39252

Hayes suggested that the usual MAC{0, 4} register writes be completed
with writes to extended GigaMAC registers :
- 0xe0 .. 0xe5
- 0xf2 .. 0xf7

Registers 0xf0 and 0xf1 should be set to 0.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index c77286edba4..02339b3352e 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1092,6 +1092,21 @@ rtl_w1w0_eri(void __iomem *ioaddr, int addr, u32 mask, u32 p, u32 m, int type)
         rtl_eri_write(ioaddr, addr, mask, (val & ~m) | p, type);
 }
 
+struct exgmac_reg {
+        u16 addr;
+        u16 mask;
+        u32 val;
+};
+
+static void rtl_write_exgmac_batch(void __iomem *ioaddr,
+                                   const struct exgmac_reg *r, int len)
+{
+        while (len-- > 0) {
+                rtl_eri_write(ioaddr, r->addr, r->mask, r->val, ERIAR_EXGMAC);
+                r++;
+        }
+}
+
 static u8 rtl8168d_efuse_read(void __iomem *ioaddr, int reg_addr)
 {
         u8 value = 0xff;
@@ -3117,6 +3132,18 @@ static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)
         RTL_W32(MAC0, low);
         RTL_R32(MAC0);
 
+        if (tp->mac_version == RTL_GIGA_MAC_VER_34) {
+                const struct exgmac_reg e[] = {
+                        { .addr = 0xe0, ERIAR_MASK_1111, .val = low },
+                        { .addr = 0xe4, ERIAR_MASK_1111, .val = high },
+                        { .addr = 0xf0, ERIAR_MASK_1111, .val = low << 16 },
+                        { .addr = 0xf4, ERIAR_MASK_1111, .val = high << 16 |
+                                                                low  >> 16 },
+                };
+
+                rtl_write_exgmac_batch(ioaddr, e, ARRAY_SIZE(e));
+        }
+
         RTL_W8(Cfg9346, Cfg9346_Lock);
 
         spin_unlock_irq(&tp->lock);