bars are uintmem.  masks must be uintmem.
not sure why the compiler didn't warn.

Reference: /n/atom/patch/applied2013/fsamd64barsz
Date: Tue Sep 17 15:01:40 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/fs/amd64/ether82563.c	Tue Sep 17 14:57:26 2013
+++ /sys/src/fs/amd64/ether82563.c	Tue Sep 17 14:57:27 2013
@@ -971,6 +971,7 @@
 		ctlr->rdfree++;
 	}
 	if(i != 0){
+		sfence();
 		ctlr->rdt = rdt;
 		csr32w(ctlr, Rdt, rdt);
 	}
@@ -1026,7 +1027,7 @@
 	if(cttab[ctlr->type].flag & F75)
 		csr32w(ctlr, Rxdctl, 1<<WthreshSHIFT | 8<<PthreshSHIFT | 1<<HthreshSHIFT | Enable);
 	else
-		csr32w(ctlr, Rxdctl, 2<<WthreshSHIFT | 2<<PthreshSHIFT);
+		csr32w(ctlr, Rxdctl, 2<<WthreshSHIFT | 2<<PthreshSHIFT | 1<<HthreshSHIFT);
 
 	/*
 	 * Enable checksum offload.
@@ -1443,7 +1444,7 @@
 	u16int sum;
 	Flash f;
 
-	io = c->pcidev->mem[1].bar & ~0x0f;
+	io = c->pcidev->mem[1].bar & ~(uintmem)0x0f;
 	f.reg = vmap(io, c->pcidev->mem[1].size);
 	if(f.reg == nil)
 		return -1;
@@ -1649,7 +1650,7 @@
 		c->type = type;
 		c->pcidev = p;
 		c->rbsz = cttab[type].mtu;
-		c->port = p->mem[0].bar & ~0x0F;
+		c->port = p->mem[0].bar & ~(uintmem)0xf;
 		*cc = c;
 		cc = &c->next;
 	}
@@ -1715,6 +1716,7 @@
 		}
 	}
 
+	snprint(edev->type, sizeof edev->type, "%s", cname(ctlr));	/* gimpy */
 	edev->ctlr = ctlr;
 	edev->port = ctlr->port;
 	edev->irq = ctlr->pcidev->intl;
--- /sys/src/fs/amd64/ether82598.c	Tue Sep 17 14:57:29 2013
+++ /sys/src/fs/amd64/ether82598.c	Tue Sep 17 14:57:30 2013
@@ -515,7 +515,7 @@
 	}
 	if(i){
 		c->tdt = tdt;
-		coherence();
+		sfence();
 		c->reg[Tdt] = tdt;
 	}
 	qunlock(&c->tlock);
@@ -605,7 +605,7 @@
 	}
 nobufs:
 	if(i){
-		coherence();
+		sfence();
 		c->reg[Rdt] = c->rdt = rdt;
 	}
 	if(rdt == rdh)
@@ -681,7 +681,7 @@
 
 	/* not cleared by reset; kill it manually. */
 	for(i = 1; i<16; i++)
-		c->reg[Rah] &= ~(1<<31);
+		c->reg[Rah + 2*i] &= ~(1<<31);
 	for(i = 0; i<128; i++)
 		c->reg[Mta+i] = 0;
 	for(i = 1; i<640; i++)
@@ -701,7 +701,7 @@
 {
 	c->reg[Eerd] = EEstart|i<<2;
 	while((c->reg[Eerd]&EEdone) == 0)
-		;
+		pause();
 	return c->reg[Eerd]>>16;
 }
 
@@ -926,7 +926,7 @@
 			print("%s: %T: too many controllers\n", name, p->tbdf);
 			return;
 		}
-		io = p->mem[0].bar&~0xf;
+		io = p->mem[0].bar&~(uintmem)0xf;
 		mem = vmap(io, p->mem[0].size);
 		if(mem == 0){
 			print("%s: %T: cant map bar\n", name, p->tbdf);