From a5da6053df47f9cbd3b02bbf8a49a4355023f009 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Thu, 19 Apr 2001 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2001-04-19

---
 pc/ether82557.c | 110 ++++++++++++++++++++++++------------------------
 1 file changed, 54 insertions(+), 56 deletions(-)

diff --git a/pc/ether82557.c b/pc/ether82557.c
index 3429bb480051abdeb957c3d4e89ff3b9a88a6610..4b4a9ac39cea8fd33f8bf9d5250f9c64f74e5656 100644
--- a/pc/ether82557.c
+++ b/pc/ether82557.c
@@ -183,11 +183,16 @@ enum {					/* CbTransmit count */
 	CbEOF		= 0x8000,
 };
 
+typedef struct Ctlr Ctlr;
 typedef struct Ctlr {
 	Lock	slock;			/* attach */
 	int	state;
 
 	int	port;
+	Pcidev*	pcidev;
+	Ctlr*	next;
+	int	active;
+
 	int	eepromsz;		/* address size in bits */
 	ushort*	eeprom;
 
@@ -219,6 +224,9 @@ typedef struct Ctlr {
 	ulong	dump[17];
 } Ctlr;
 
+static Ctlr* ctlrhead;
+static Ctlr* ctlrtail;
+
 static uchar configdata[24] = {
 	0x16,				/* byte count */
 	0x08,				/* Rx/Tx FIFO limit */
@@ -882,34 +890,12 @@ reread:
 	return data;
 }
 
-typedef struct Adapter {
-	int	port;
-	int	irq;
-	int	tbdf;
-} Adapter;
-static Block* adapter;
-
-static void
-i82557adapter(Block** bpp, int port, int irq, int tbdf)
-{
-	Block *bp;
-	Adapter *ap;
-
-	bp = allocb(sizeof(Adapter));
-	ap = (Adapter*)bp->rp;
-	ap->port = port;
-	ap->irq = irq;
-	ap->tbdf = tbdf;
-
-	bp->next = *bpp;
-	*bpp = bp;
-}
-
 static void
 i82557pci(void)
 {
-	Pcidev *p;
 	int port;
+	Pcidev *p;
+	Ctlr *ctlr;
 
 	p = nil;
 	while(p = pcimatch(p, 0x8086, 0x1229)){
@@ -919,11 +905,21 @@ i82557pci(void)
 		 * bar[2] is for the flash ROM (1MB).
 		 */
 		port = p->mem[1].bar & ~0x01;
-		if(ioalloc(port, p->mem[1].size, 0, "i82557pci") < 0){
-			print("i82557pci: port 0x%uX in use\n", port);
+		if(ioalloc(port, p->mem[1].size, 0, "i82557") < 0){
+			print("i82557: port 0x%uX in use\n", port);
 			continue;
 		}
-		i82557adapter(&adapter, port, p->intl, p->tbdf);
+
+		ctlr = malloc(sizeof(Ctlr));
+		ctlr->port = port;
+		ctlr->pcidev = p;
+
+		if(ctlrhead != nil)
+			ctlrtail->next = ctlr;
+		else
+			ctlrhead = ctlr;
+		ctlrtail = ctlr;
+
 		pcisetbme(p);
 	}
 }
@@ -970,51 +966,41 @@ scanphy(Ctlr* ctlr)
 static int
 reset(Ether* ether)
 {
-	int anar, anlpar, bmcr, bmsr, i, k, medium, phyaddr, port, x;
+	int anar, anlpar, bmcr, bmsr, i, k, medium, phyaddr, x;
 	unsigned short sum;
-	Block *bp, **bpp;
-	Adapter *ap;
 	uchar ea[Eaddrlen];
 	Ctlr *ctlr;
-	static int scandone;
 
-	if(scandone == 0){
+	if(ctlrhead == nil)
 		i82557pci();
-		scandone = 1;
-	}
 
 	/*
-	 * Any adapter matches if no port is supplied,
+	 * Any adapter matches if no ether->port is supplied,
 	 * otherwise the ports must match.
 	 */
-	port = 0;
-	bpp = &adapter;
-	for(bp = *bpp; bp; bp = bp->next){
-		ap = (Adapter*)bp->rp;
-		if(ether->port == 0 || ether->port == ap->port){
-			port = ap->port;
-			ether->irq = ap->irq;
-			ether->tbdf = ap->tbdf;
-			*bpp = bp->next;
-			freeb(bp);
+	for(ctlr = ctlrhead; ctlr != nil; ctlr = ctlr->next){
+		if(ctlr->active)
+			continue;
+		if(ether->port == 0 || ether->port == ctlr->port){
+			ctlr->active = 1;
 			break;
 		}
-		bpp = &bp->next;
 	}
-	if(port == 0)
+	if(ctlr == nil)
 		return -1;
 
 	/*
-	 * Allocate a controller structure and start to initialise it.
+	 * Initialise the Ctlr structure.
 	 * Perform a software reset after which should ensure busmastering
 	 * is still enabled. The EtherExpress PRO/100B appears to leave
 	 * the PCI configuration alone (see the 'To do' list above) so punt
 	 * for now.
 	 * Load the RUB and CUB registers for linear addressing (0).
 	 */
-	ether->ctlr = malloc(sizeof(Ctlr));
-	ctlr = ether->ctlr;
-	ctlr->port = port;
+	ether->ctlr = ctlr;
+	ether->port = ctlr->port;
+	ether->irq = ctlr->pcidev->intl;
+	ether->tbdf = ctlr->pcidev->tbdf;
 
 	ilock(&ctlr->rlock);
 	csr32w(ctlr, Port, 0);
@@ -1053,16 +1039,29 @@ reset(Ether* ether)
 	 * to set any PHY specific options and determine the speed.
 	 * Unfortunately, sometimes the EEPROM is blank except for
 	 * the ether address and checksum; in this case look at the
-	 * controller type and if 0 scan for the first PHY and try to
-	 * use that.
+	 * controller type and if it's am 82558 or 82559 it has an
+	 * embedded PHY so scan for that.
 	 * If no PHY, assume 82503 (serial) operation.
 	 */
 	if((ctlr->eeprom[6] & 0x1F00) && !(ctlr->eeprom[6] & 0x8000))
 		phyaddr = ctlr->eeprom[6] & 0x00FF;
-	else if(!(ctlr->eeprom[5] & 0xFF00))
-		phyaddr = scanphy(ctlr);
 	else
+	switch(ctlr->pcidev->rid){
+	case 0x01:			/* 82557 A-step */
+	case 0x02:			/* 82557 B-step */
+	case 0x03:			/* 82557 C-step */
+	default:
 		phyaddr = -1;
+		break;
+	case 0x04:			/* 82558 A-step */
+	case 0x05:			/* 82558 B-step */
+	case 0x06:			/* 82559 A-step */
+	case 0x07:			/* 82559 B-step */
+	case 0x08:			/* 82559 C-step */
+	case 0x09:			/* 82559ER A-step */
+		phyaddr = scanphy(ctlr);
+		break;
+	}
 	if(phyaddr >= 0){
 		/*
 		 * Resolve the highest common ability of the two
@@ -1234,7 +1233,6 @@ reset(Ether* ether)
 	/*
 	 * Linkage to the generic ethernet driver.
 	 */
-	ether->port = port;
 	ether->attach = attach;
 	ether->transmit = transmit;
 	ether->interrupt = interrupt;