fix bad statistic.  no longer accept flow control from switches.

Reference: /n/atom/patch/applied2013/x540nits
Date: Wed Dec 18 22:57:43 CET 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/ether82598.c	Wed Dec 18 22:57:14 2013
+++ /sys/src/nix/k10/ether82598.c	Wed Dec 18 22:57:14 2013
@@ -229,6 +229,8 @@
 	0xcf60,	"xon rx",
 	0x3f68,	"xoff tx",
 	0xcf68,	"xoff rx",
+	0x4184,	"xon rx",			/* x540 only */
+	0x41a8,	"xoff rx",			/* x540 only */
 	0x405c,	"rx 040",
 	0x4060,	"rx 07f",
 	0x4064,	"rx 100",
@@ -256,10 +258,16 @@
 };
 
 uchar statmask[Nctlrtype][nelem(stattab)] = {
+[i82598][11]	= 1,
+[i82598][12]	= 1,
 [i82599][7]	= 1,
 [i82599][8]	= 1,
 [i82599][9]	= 1,
 [i82599][10]	= 1,
+[i82599][11]	= 1,
+[i82599][12]	= 1,
+[x540][8]		= 1,
+[x540][10]	= 1,
 };
 
 /* status */
@@ -695,7 +703,7 @@
 	}
 	c->rdfree = 0;
 
-	c->reg[Fctrl] |= Bam|Rfce|Dpf;
+	c->reg[Fctrl] |= Bam|Dpf;
 	c->reg[Rxcsum] |= Ipcs;
 	c->reg[Srrctl] = (c->rbsz+1023)/1024;
 	c->reg[Mhadd] = c->rbsz<<16;
--- /sys/src/9/pc/ether82598.c	Wed Dec 18 22:57:14 2013
+++ /sys/src/9/pc/ether82598.c	Wed Dec 18 22:57:14 2013
@@ -229,6 +229,8 @@
 	0xcf60,	"xon rx",
 	0x3f68,	"xoff tx",
 	0xcf68,	"xoff rx",
+	0x4184,	"xon rx",			/* x540 only */
+	0x41a8,	"xoff rx",			/* x540 only */
 	0x405c,	"rx 040",
 	0x4060,	"rx 07f",
 	0x4064,	"rx 100",
@@ -256,10 +258,16 @@
 };
 
 uchar statmask[Nctlrtype][nelem(stattab)] = {
+[i82598][11]	= 1,
+[i82598][12]	= 1,
 [i82599][7]	= 1,
 [i82599][8]	= 1,
 [i82599][9]	= 1,
 [i82599][10]	= 1,
+[i82599][11]	= 1,
+[i82599][12]	= 1,
+[x540][8]		= 1,
+[x540][10]	= 1,
 };
 
 /* status */
@@ -695,7 +703,7 @@
 	}
 	c->rdfree = 0;
 
-	c->reg[Fctrl] |= Bam|Rfce|Dpf;
+	c->reg[Fctrl] |= Bam|Dpf;
 	c->reg[Rxcsum] |= Ipcs;
 	c->reg[Srrctl] = (c->rbsz+1023)/1024;
 	c->reg[Mhadd] = c->rbsz<<16;
--- /sys/src/9/pcpae/ether82598.c	Wed Dec 18 22:57:14 2013
+++ /sys/src/9/pcpae/ether82598.c	Wed Dec 18 22:57:14 2013
@@ -229,6 +229,8 @@
 	0xcf60,	"xon rx",
 	0x3f68,	"xoff tx",
 	0xcf68,	"xoff rx",
+	0x4184,	"xon rx",			/* x540 only */
+	0x41a8,	"xoff rx",			/* x540 only */
 	0x405c,	"rx 040",
 	0x4060,	"rx 07f",
 	0x4064,	"rx 100",
@@ -256,10 +258,16 @@
 };
 
 uchar statmask[Nctlrtype][nelem(stattab)] = {
+[i82598][11]	= 1,
+[i82598][12]	= 1,
 [i82599][7]	= 1,
 [i82599][8]	= 1,
 [i82599][9]	= 1,
 [i82599][10]	= 1,
+[i82599][11]	= 1,
+[i82599][12]	= 1,
+[x540][8]		= 1,
+[x540][10]	= 1,
 };
 
 /* status */
@@ -695,7 +703,7 @@
 	}
 	c->rdfree = 0;
 
-	c->reg[Fctrl] |= Bam|Rfce|Dpf;
+	c->reg[Fctrl] |= Bam|Dpf;
 	c->reg[Rxcsum] |= Ipcs;
 	c->reg[Srrctl] = (c->rbsz+1023)/1024;
 	c->reg[Mhadd] = c->rbsz<<16;