* crc is exactly 32 bits
* deal with 40gbe
   (keep queues from getting too large)
* print better ether information
* pass flags along when doing loopback, or when copying blocks.
* allow drivers to set up their own vector (for msi-x)

Reference: /n/atom/patch/applied/ethermsihooks
Date: Sun Aug 16 19:31:26 CES 2015
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/devether.c	Sun Aug 16 19:30:22 2015
+++ /sys/src/nix/k10/devether.c	Sun Aug 16 19:30:23 2015
@@ -150,6 +150,7 @@
 				fx = f;
 			else if(xbp = iallocb(len)){
 				memmove(xbp->wp, pkt, len);
+				xbp->flag = bp->flag;
 				xbp->wp += len;
 				if(qpass(f->iq, xbp) < 0)
 					ether->soverflows++;
@@ -166,7 +167,7 @@
 	}
 	if(fromwire){
 		freeb(bp);
-		return 0;
+		return nil;
 	}
 
 	return bp;
@@ -193,12 +194,14 @@
 	len = BLEN(bp);
 	loopback = memcmp(pkt->d, ether->ea, sizeof(pkt->d)) == 0;
 	if(loopback){
+		bp->flag |= Btcpck|Budpck|Bipck|Bpktck;
 		etheriq(ether, bp, -1);
 		return len;
 	}
 
 	if(memcmp(pkt->d, ether->bcast, sizeof(pkt->d)) == 0 || ether->prom)
 		etheriq(ether, bp, 0);
+
 	qbwrite(ether->oq, bp);		/* botch: might block; should track overflows */
 	if(ether->transmit != nil)
 		ether->transmit(ether);
@@ -375,17 +378,21 @@
 	 * If ether->irq is <0, it is a hack to indicate no interrupt
 	 * used by ethersink.
 	 */
-	if(ether->irq >= 0)
+	if(ether->vector != nil)
+		vintrenable(ether->vector, name);
+	else if(ether->irq >= 0)
 		ether->vector = intrenable(ether->irq, ether->interrupt, ether, ether->tbdf, name);
-	print("#l%d: %s: %dMbps port %#p tu %d %E\n",
-		ctlrno, cards[cardno].type, ether->mbps, ether->port, ether->mtu, ether->ea);
+	print("#l%d: %s: %dMbps port %#p tbdf %T tu %d %E\n",
+		ctlrno, cards[cardno].type, ether->mbps, ether->port, ether->tbdf, ether->mtu, ether->ea);
 
 	j = ether->mbps;
+	if(j > 10000)
+		j = 10000;
 	if(j > 1000)
 		j *= 10;
 	for(i = 0; j >= 100; i++)
 		j /= 10;
-	i = 128*1024<<i;
+	i = 2*128*1024<<i;
 	netifinit(ether, name, Ntypes, i);
 	if(ether->oq == nil)
 		ether->oq = qopen(i, Qmsg, 0, 0);
--- /sys/src/nix/k10/etherif.h	Sun Aug 16 19:30:25 2015
+++ /sys/src/nix/k10/etherif.h	Sun Aug 16 19:30:26 2015
@@ -40,7 +40,7 @@
 
 Block*	etheriq(Ether*, Block*, int);
 void	addethercard(char*, int(*)(Ether*));
-uint	ethercrc(uchar*, int);
+u32int	ethercrc(uchar*, int);
 int	parseether(uchar*, char*);
 int	ethercfgmatch(Ether*, Pcidev*, uintmem);