gianfar: Add Multiple group Support

This patch introduces multiple group support for etsec2.0
devices.

Multiple group support is provided by mapping the set of enabled
queues to different groups and then programming the per group
regsiters imask, ievent, rstat, tstat.

The queues corresponding to a group are indicated by programming
isrg (interrupt steering) registers.

Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/gianfar.c

@@ -326,7 +326,7 @@ cleanup:
 
 static void gfar_init_tx_rx_base(struct gfar_private *priv)
 {
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u32 *baddr;
 	int i;
 
@@ -346,7 +346,7 @@ static void gfar_init_tx_rx_base(struct gfar_private *priv)
 static void gfar_init_mac(struct net_device *ndev)
 {
 	struct gfar_private *priv = netdev_priv(ndev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u32 rctrl = 0;
 	u32 tctrl = 0;
 	u32 attrs = 0;
@@ -355,13 +355,7 @@ static void gfar_init_mac(struct net_device *ndev)
 	gfar_init_tx_rx_base(priv);
 
 	/* Configure the coalescing support */
-	gfar_write(&regs->txic, 0);
-	if (priv->tx_queue[0]->txcoalescing)
-		gfar_write(&regs->txic, priv->tx_queue[0]->txic);
-
-	gfar_write(&regs->rxic, 0);
-	if (priv->rx_queue[0]->rxcoalescing)
-		gfar_write(&regs->rxic, priv->rx_queue[0]->rxic);
+	gfar_configure_coalescing(priv, 0xFF, 0xFF);
 
 	if (priv->rx_filer_enable)
 		rctrl |= RCTRL_FILREN;
@@ -495,16 +489,91 @@ static void free_rx_pointers(struct gfar_private *priv)
 		kfree(priv->rx_queue[i]);
 }
 
+static void unmap_group_regs(struct gfar_private *priv)
+{
+	int i = 0;
+
+	for (i = 0; i < MAXGROUPS; i++)
+		if (priv->gfargrp[i].regs)
+			iounmap(priv->gfargrp[i].regs);
+}
+
+static void disable_napi(struct gfar_private *priv)
+{
+	int i = 0;
+
+	for (i = 0; i < priv->num_grps; i++)
+		napi_disable(&priv->gfargrp[i].napi);
+}
+
+static void enable_napi(struct gfar_private *priv)
+{
+	int i = 0;
+
+	for (i = 0; i < priv->num_grps; i++)
+		napi_enable(&priv->gfargrp[i].napi);
+}
+
+static int gfar_parse_group(struct device_node *np,
+		struct gfar_private *priv, const char *model)
+{
+	u32 *queue_mask;
+	u64 addr, size;
+
+	addr = of_translate_address(np,
+			of_get_address(np, 0, &size, NULL));
+	priv->gfargrp[priv->num_grps].regs = ioremap(addr, size);
+
+	if (!priv->gfargrp[priv->num_grps].regs)
+		return -ENOMEM;
+
+	priv->gfargrp[priv->num_grps].interruptTransmit =
+			irq_of_parse_and_map(np, 0);
+
+	/* If we aren't the FEC we have multiple interrupts */
+	if (model && strcasecmp(model, "FEC")) {
+		priv->gfargrp[priv->num_grps].interruptReceive =
+			irq_of_parse_and_map(np, 1);
+		priv->gfargrp[priv->num_grps].interruptError =
+			irq_of_parse_and_map(np,2);
+		if (priv->gfargrp[priv->num_grps].interruptTransmit < 0 ||
+			priv->gfargrp[priv->num_grps].interruptReceive < 0 ||
+			priv->gfargrp[priv->num_grps].interruptError < 0) {
+			return -EINVAL;
+		}
+	}
+
+	priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;
+	priv->gfargrp[priv->num_grps].priv = priv;
+	spin_lock_init(&priv->gfargrp[priv->num_grps].grplock);
+	if(priv->mode == MQ_MG_MODE) {
+		queue_mask = (u32 *)of_get_property(np,
+					"fsl,rx-bit-map", NULL);
+		priv->gfargrp[priv->num_grps].rx_bit_map =
+			queue_mask ?  *queue_mask :(DEFAULT_MAPPING >> priv->num_grps);
+		queue_mask = (u32 *)of_get_property(np,
+					"fsl,tx-bit-map", NULL);
+		priv->gfargrp[priv->num_grps].tx_bit_map =
+			queue_mask ? *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
+	} else {
+		priv->gfargrp[priv->num_grps].rx_bit_map = 0xFF;
+		priv->gfargrp[priv->num_grps].tx_bit_map = 0xFF;
+	}
+	priv->num_grps++;
+
+	return 0;
+}
+
 static int gfar_of_init(struct of_device *ofdev, struct net_device **pdev)
 {
 	const char *model;
 	const char *ctype;
 	const void *mac_addr;
-	u64 addr, size;
 	int err = 0, i;
 	struct net_device *dev = NULL;
 	struct gfar_private *priv = NULL;
 	struct device_node *np = ofdev->node;
+	struct device_node *child = NULL;
 	const u32 *stash;
 	const u32 *stash_len;
 	const u32 *stash_idx;
@@ -548,36 +617,26 @@ static int gfar_of_init(struct of_device *ofdev, struct net_device **pdev)
 	dev->real_num_tx_queues = num_tx_qs;
 	priv->num_tx_queues = num_tx_qs;
 	priv->num_rx_queues = num_rx_qs;
-
-	/* get a pointer to the register memory */
-	addr = of_translate_address(np, of_get_address(np, 0, &size, NULL));
-	priv->gfargrp.regs = ioremap(addr, size);
-
-	if (priv->gfargrp.regs == NULL) {
-		err = -ENOMEM;
-		goto err_out;
-	}
-
-	priv->gfargrp.priv = priv; /* back pointer from group to priv */
-	priv->gfargrp.rx_bit_map = DEFAULT_MAPPING;
-	priv->gfargrp.tx_bit_map = DEFAULT_MAPPING;
-
-	priv->gfargrp.interruptTransmit = irq_of_parse_and_map(np, 0);
+	priv->num_grps = 0x0;
 
 	model = of_get_property(np, "model", NULL);
 
-	/* If we aren't the FEC we have multiple interrupts */
-	if (model && strcasecmp(model, "FEC")) {
-		priv->gfargrp.interruptReceive = irq_of_parse_and_map(np, 1);
+	for (i = 0; i < MAXGROUPS; i++)
+		priv->gfargrp[i].regs = NULL;
 
-		priv->gfargrp.interruptError = irq_of_parse_and_map(np, 2);
-
-		if (priv->gfargrp.interruptTransmit < 0 ||
-				priv->gfargrp.interruptReceive < 0 ||
-				priv->gfargrp.interruptError < 0) {
-			err = -EINVAL;
-			goto err_out;
+	/* Parse and initialize group specific information */
+	if (of_device_is_compatible(np, "fsl,etsec2")) {
+		priv->mode = MQ_MG_MODE;
+		for_each_child_of_node(np, child) {
+			err = gfar_parse_group(child, priv, model);
+			if (err)
+				goto err_grp_init;
 		}
+	} else {
+		priv->mode = SQ_SG_MODE;
+		err = gfar_parse_group(np, priv, model);
+		if(err)
+			goto err_grp_init;
 	}
 
 	for (i = 0; i < priv->num_tx_queues; i++)
@@ -676,8 +735,8 @@ rx_alloc_failed:
 	free_rx_pointers(priv);
 tx_alloc_failed:
 	free_tx_pointers(priv);
-err_out:
-	iounmap(priv->gfargrp.regs);
+err_grp_init:
+	unmap_group_regs(priv);
 	free_netdev(dev);
 	return err;
 }
@@ -716,9 +775,11 @@ static int gfar_probe(struct of_device *ofdev,
 	struct net_device *dev = NULL;
 	struct gfar_private *priv = NULL;
 	struct gfar __iomem *regs = NULL;
-	int err = 0, i;
+	int err = 0, i, grp_idx = 0;
 	int len_devname;
 	u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0;
+	u32 isrg = 0;
+	u32 *baddr;
 
 	err = gfar_of_init(ofdev, &dev);
 
@@ -731,12 +792,11 @@ static int gfar_probe(struct of_device *ofdev,
 	priv->node = ofdev->node;
 	SET_NETDEV_DEV(dev, &ofdev->dev);
 
-	spin_lock_init(&priv->gfargrp.grplock);
 	spin_lock_init(&priv->bflock);
 	INIT_WORK(&priv->reset_task, gfar_reset_task);
 
 	dev_set_drvdata(&ofdev->dev, priv);
-	regs = priv->gfargrp.regs;
+	regs = priv->gfargrp[0].regs;
 
 	/* Stop the DMA engine now, in case it was running before */
 	/* (The firmware could have used it, and left it running). */
@@ -769,7 +829,8 @@ static int gfar_probe(struct of_device *ofdev,
 	dev->ethtool_ops = &gfar_ethtool_ops;
 
 	/* Register for napi ...We are registering NAPI for each grp */
-	netif_napi_add(dev, &priv->gfargrp.napi, gfar_poll, GFAR_DEV_WEIGHT);
+	for (i = 0; i < priv->num_grps; i++)
+		netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT);
 
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
 		priv->rx_csum_enable = 1;
@@ -825,25 +886,51 @@ static int gfar_probe(struct of_device *ofdev,
 	if (dev->features & NETIF_F_IP_CSUM)
 		dev->hard_header_len += GMAC_FCB_LEN;
 
+	/* Program the isrg regs only if number of grps > 1 */
+	if (priv->num_grps > 1) {
+		baddr = &regs->isrg0;
+		for (i = 0; i < priv->num_grps; i++) {
+			isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX);
+			isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX);
+			gfar_write(baddr, isrg);
+			baddr++;
+			isrg = 0x0;
+		}
+	}
+
 	/* Need to reverse the bit maps as  bit_map's MSB is q0
 	 * but, for_each_bit parses from right to left, which
 	 * basically reverses the queue numbers */
-	priv->gfargrp.tx_bit_map = reverse_bitmap(priv->gfargrp.tx_bit_map, MAX_TX_QS);
-	priv->gfargrp.rx_bit_map = reverse_bitmap(priv->gfargrp.rx_bit_map, MAX_RX_QS);
-
-	/* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values */
-	for_each_bit(i, &priv->gfargrp.rx_bit_map, priv->num_rx_queues) {
-		priv->gfargrp.num_rx_queues++;
-		rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
-		rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
-	}
-	for_each_bit (i, &priv->gfargrp.tx_bit_map, priv->num_tx_queues) {
-		priv->gfargrp.num_tx_queues++;
-		tstat = tstat | (TSTAT_CLEAR_THALT >> i);
-		tqueue = tqueue | (TQUEUE_EN0 >> i);
+	for (i = 0; i< priv->num_grps; i++) {
+		priv->gfargrp[i].tx_bit_map = reverse_bitmap(
+				priv->gfargrp[i].tx_bit_map, MAX_TX_QS);
+		priv->gfargrp[i].rx_bit_map = reverse_bitmap(
+				priv->gfargrp[i].rx_bit_map, MAX_RX_QS);
+	}
+
+	/* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values,
+	 * also assign queues to groups */
+	for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
+		priv->gfargrp[grp_idx].num_rx_queues = 0x0;
+		for_each_bit(i, &priv->gfargrp[grp_idx].rx_bit_map,
+				priv->num_rx_queues) {
+			priv->gfargrp[grp_idx].num_rx_queues++;
+			priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx];
+			rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
+			rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
+		}
+		priv->gfargrp[grp_idx].num_tx_queues = 0x0;
+		for_each_bit (i, &priv->gfargrp[grp_idx].tx_bit_map,
+				priv->num_tx_queues) {
+			priv->gfargrp[grp_idx].num_tx_queues++;
+			priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx];
+			tstat = tstat | (TSTAT_CLEAR_THALT >> i);
+			tqueue = tqueue | (TQUEUE_EN0 >> i);
+		}
+		priv->gfargrp[grp_idx].rstat = rstat;
+		priv->gfargrp[grp_idx].tstat = tstat;
+		rstat = tstat =0;
 	}
-	priv->gfargrp.rstat = rstat;
-	priv->gfargrp.tstat = tstat;
 
 	gfar_write(&regs->rqueue, rqueue);
 	gfar_write(&regs->tqueue, tqueue);
@@ -883,20 +970,40 @@ static int gfar_probe(struct of_device *ofdev,
 
 	/* fill out IRQ number and name fields */
 	len_devname = strlen(dev->name);
-	strncpy(&priv->gfargrp.int_name_tx[0], dev->name, len_devname);
-	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
-		strncpy(&priv->gfargrp.int_name_tx[len_devname],
-			"_tx", sizeof("_tx") + 1);
-
-		strncpy(&priv->gfargrp.int_name_rx[0], dev->name, len_devname);
-		strncpy(&priv->gfargrp.int_name_rx[len_devname],
-			"_rx", sizeof("_rx") + 1);
-
-		strncpy(&priv->gfargrp.int_name_er[0], dev->name, len_devname);
-		strncpy(&priv->gfargrp.int_name_er[len_devname],
-			"_er", sizeof("_er") + 1);
-	} else
-		priv->gfargrp.int_name_tx[len_devname] = '\0';
+	for (i = 0; i < priv->num_grps; i++) {
+		strncpy(&priv->gfargrp[i].int_name_tx[0], dev->name,
+				len_devname);
+		if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
+			strncpy(&priv->gfargrp[i].int_name_tx[len_devname],
+				"_g", sizeof("_g"));
+			priv->gfargrp[i].int_name_tx[
+				strlen(priv->gfargrp[i].int_name_tx)] = i+48;
+			strncpy(&priv->gfargrp[i].int_name_tx[strlen(
+				priv->gfargrp[i].int_name_tx)],
+				"_tx", sizeof("_tx") + 1);
+
+			strncpy(&priv->gfargrp[i].int_name_rx[0], dev->name,
+					len_devname);
+			strncpy(&priv->gfargrp[i].int_name_rx[len_devname],
+					"_g", sizeof("_g"));
+			priv->gfargrp[i].int_name_rx[
+				strlen(priv->gfargrp[i].int_name_rx)] = i+48;
+			strncpy(&priv->gfargrp[i].int_name_rx[strlen(
+				priv->gfargrp[i].int_name_rx)],
+				"_rx", sizeof("_rx") + 1);
+
+			strncpy(&priv->gfargrp[i].int_name_er[0], dev->name,
+					len_devname);
+			strncpy(&priv->gfargrp[i].int_name_er[len_devname],
+				"_g", sizeof("_g"));
+			priv->gfargrp[i].int_name_er[strlen(
+					priv->gfargrp[i].int_name_er)] = i+48;
+			strncpy(&priv->gfargrp[i].int_name_er[strlen(\
+				priv->gfargrp[i].int_name_er)],
+				"_er", sizeof("_er") + 1);
+		} else
+			priv->gfargrp[i].int_name_tx[len_devname] = '\0';
+	}
 
 	/* Create all the sysfs files */
 	gfar_init_sysfs(dev);
@@ -917,7 +1024,7 @@ static int gfar_probe(struct of_device *ofdev,
 	return 0;
 
 register_fail:
-	iounmap(priv->gfargrp.regs);
+	unmap_group_regs(priv);
 	free_tx_pointers(priv);
 	free_rx_pointers(priv);
 	if (priv->phy_node)
@@ -940,7 +1047,7 @@ static int gfar_remove(struct of_device *ofdev)
 	dev_set_drvdata(&ofdev->dev, NULL);
 
 	unregister_netdev(priv->ndev);
-	iounmap(priv->gfargrp.regs);
+	unmap_group_regs(priv);
 	free_netdev(priv->ndev);
 
 	return 0;
@@ -952,7 +1059,7 @@ static int gfar_suspend(struct device *dev)
 {
 	struct gfar_private *priv = dev_get_drvdata(dev);
 	struct net_device *ndev = priv->ndev;
-	struct gfar __iomem *regs = NULL;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned long flags;
 	u32 tempval;
 
@@ -960,7 +1067,6 @@ static int gfar_suspend(struct device *dev)
 		(priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
 
 	netif_device_detach(ndev);
-	regs = priv->gfargrp.regs;
 
 	if (netif_running(ndev)) {
 
@@ -984,7 +1090,7 @@ static int gfar_suspend(struct device *dev)
 		unlock_tx_qs(priv);
 		local_irq_restore(flags);
 
-		napi_disable(&priv->gfargrp.napi);
+		disable_napi(priv);
 
 		if (magic_packet) {
 			/* Enable interrupt on Magic Packet */
@@ -1006,7 +1112,7 @@ static int gfar_resume(struct device *dev)
 {
 	struct gfar_private *priv = dev_get_drvdata(dev);
 	struct net_device *ndev = priv->ndev;
-	struct gfar __iomem *regs = NULL;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned long flags;
 	u32 tempval;
 	int magic_packet = priv->wol_en &&
@@ -1023,8 +1129,6 @@ static int gfar_resume(struct device *dev)
 	/* Disable Magic Packet mode, in case something
 	 * else woke us up.
 	 */
-	regs = priv->gfargrp.regs;
-
 	local_irq_save(flags);
 	lock_tx_qs(priv);
 	lock_rx_qs(priv);
@@ -1041,7 +1145,7 @@ static int gfar_resume(struct device *dev)
 
 	netif_device_attach(ndev);
 
-	napi_enable(&priv->gfargrp.napi);
+	enable_napi(priv);
 
 	return 0;
 }
@@ -1107,10 +1211,9 @@ static int gfar_legacy_resume(struct of_device *ofdev)
 static phy_interface_t gfar_get_interface(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = NULL;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u32 ecntrl;
 
-	regs = priv->gfargrp.regs;
 	ecntrl = gfar_read(&regs->ecntrl);
 
 	if (ecntrl & ECNTRL_SGMII_MODE)
@@ -1234,14 +1337,18 @@ static void init_registers(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
 	struct gfar __iomem *regs = NULL;
+	int i = 0;
 
-	regs = priv->gfargrp.regs;
-	/* Clear IEVENT */
-	gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
+	for (i = 0; i < priv->num_grps; i++) {
+		regs = priv->gfargrp[i].regs;
+		/* Clear IEVENT */
+		gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
 
-	/* Initialize IMASK */
-	gfar_write(&regs->imask, IMASK_INIT_CLEAR);
+		/* Initialize IMASK */
+		gfar_write(&regs->imask, IMASK_INIT_CLEAR);
+	}
 
+	regs = priv->gfargrp[0].regs;
 	/* Init hash registers to zero */
 	gfar_write(&regs->igaddr0, 0);
 	gfar_write(&regs->igaddr1, 0);
@@ -1282,15 +1389,20 @@ static void init_registers(struct net_device *dev)
 static void gfar_halt_nodisable(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = NULL;
 	u32 tempval;
+	int i = 0;
 
-	/* Mask all interrupts */
-	gfar_write(&regs->imask, IMASK_INIT_CLEAR);
+	for (i = 0; i < priv->num_grps; i++) {
+		regs = priv->gfargrp[i].regs;
+		/* Mask all interrupts */
+		gfar_write(&regs->imask, IMASK_INIT_CLEAR);
 
-	/* Clear all interrupts */
-	gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
+		/* Clear all interrupts */
+		gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
+	}
 
+	regs = priv->gfargrp[0].regs;
 	/* Stop the DMA, and wait for it to stop */
 	tempval = gfar_read(&regs->dmactrl);
 	if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
@@ -1308,7 +1420,7 @@ static void gfar_halt_nodisable(struct net_device *dev)
 void gfar_halt(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u32 tempval;
 
 	gfar_halt_nodisable(dev);
@@ -1319,10 +1431,18 @@ void gfar_halt(struct net_device *dev)
 	gfar_write(&regs->maccfg1, tempval);
 }
 
+static void free_grp_irqs(struct gfar_priv_grp *grp)
+{
+	free_irq(grp->interruptError, grp);
+	free_irq(grp->interruptTransmit, grp);
+	free_irq(grp->interruptReceive, grp);
+}
+
 void stop_gfar(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
 	unsigned long flags;
+	int i;
 
 	phy_stop(priv->phydev);
 
@@ -1340,11 +1460,12 @@ void stop_gfar(struct net_device *dev)
 
 	/* Free the IRQs */
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
-		free_irq(priv->gfargrp.interruptError, &priv->gfargrp);
-		free_irq(priv->gfargrp.interruptTransmit, &priv->gfargrp);
-		free_irq(priv->gfargrp.interruptReceive, &priv->gfargrp);
+		for (i = 0; i < priv->num_grps; i++)
+			free_grp_irqs(&priv->gfargrp[i]);
 	} else {
-		free_irq(priv->gfargrp.interruptTransmit, &priv->gfargrp);
+		for (i = 0; i < priv->num_grps; i++)
+			free_irq(priv->gfargrp[i].interruptTransmit,
+					&priv->gfargrp[i]);
 	}
 
 	free_skb_resources(priv);
@@ -1432,8 +1553,9 @@ static void free_skb_resources(struct gfar_private *priv)
 void gfar_start(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u32 tempval;
+	int i = 0;
 
 	/* Enable Rx and Tx in MACCFG1 */
 	tempval = gfar_read(&regs->maccfg1);
@@ -1450,92 +1572,149 @@ void gfar_start(struct net_device *dev)
 	tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
 	gfar_write(&regs->dmactrl, tempval);
 
-	/* Clear THLT/RHLT, so that the DMA starts polling now */
-	gfar_write(&regs->tstat, priv->gfargrp.tstat);
-	gfar_write(&regs->rstat, priv->gfargrp.rstat);
-
-	/* Unmask the interrupts we look for */
-	gfar_write(&regs->imask, IMASK_DEFAULT);
+	for (i = 0; i < priv->num_grps; i++) {
+		regs = priv->gfargrp[i].regs;
+		/* Clear THLT/RHLT, so that the DMA starts polling now */
+		gfar_write(&regs->tstat, priv->gfargrp[i].tstat);
+		gfar_write(&regs->rstat, priv->gfargrp[i].rstat);
+		/* Unmask the interrupts we look for */
+		gfar_write(&regs->imask, IMASK_DEFAULT);
+	}
 
 	dev->trans_start = jiffies;
 }
 
-/* Bring the controller up and running */
-int startup_gfar(struct net_device *ndev)
+void gfar_configure_coalescing(struct gfar_private *priv,
+	unsigned int tx_mask, unsigned int rx_mask)
 {
-	struct gfar_private *priv = netdev_priv(ndev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
-	int err;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
+	u32 *baddr;
+	int i = 0;
 
-	gfar_write(&regs->imask, IMASK_INIT_CLEAR);
+	/* Backward compatible case ---- even if we enable
+	 * multiple queues, there's only single reg to program
+	 */
+	gfar_write(&regs->txic, 0);
+	if(likely(priv->tx_queue[0]->txcoalescing))
+		gfar_write(&regs->txic, priv->tx_queue[0]->txic);
 
-	err = gfar_alloc_skb_resources(ndev);
-	if (err)
-		return err;
+	gfar_write(&regs->rxic, 0);
+	if(unlikely(priv->rx_queue[0]->rxcoalescing))
+		gfar_write(&regs->rxic, priv->rx_queue[0]->rxic);
 
-	gfar_init_mac(ndev);
+	if (priv->mode == MQ_MG_MODE) {
+		baddr = &regs->txic0;
+		for_each_bit (i, &tx_mask, priv->num_tx_queues) {
+			if (likely(priv->tx_queue[i]->txcoalescing)) {
+				gfar_write(baddr + i, 0);
+				gfar_write(baddr + i, priv->tx_queue[i]->txic);
+			}
+		}
+
+		baddr = &regs->rxic0;
+		for_each_bit (i, &rx_mask, priv->num_rx_queues) {
+			if (likely(priv->rx_queue[i]->rxcoalescing)) {
+				gfar_write(baddr + i, 0);
+				gfar_write(baddr + i, priv->rx_queue[i]->rxic);
+			}
+		}
+	}
+}
+
+static int register_grp_irqs(struct gfar_priv_grp *grp)
+{
+	struct gfar_private *priv = grp->priv;
+	struct net_device *dev = priv->ndev;
+	int err;
 
 	/* If the device has multiple interrupts, register for
 	 * them.  Otherwise, only register for the one */
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
 		/* Install our interrupt handlers for Error,
 		 * Transmit, and Receive */
-		err = request_irq(priv->gfargrp.interruptError, gfar_error, 0,
-				  priv->gfargrp.int_name_er, &priv->gfargrp);
-		if (err) {
+		if ((err = request_irq(grp->interruptError, gfar_error, 0,
+				grp->int_name_er,grp)) < 0) {
 			if (netif_msg_intr(priv))
-				pr_err("%s: Can't get IRQ %d\n", ndev->name,
-				       priv->gfargrp.interruptError);
-			goto err_irq_fail;
+				printk(KERN_ERR "%s: Can't get IRQ %d\n",
+					dev->name, grp->interruptError);
+
+				goto err_irq_fail;
 		}
 
-		err = request_irq(priv->gfargrp.interruptTransmit,
-					gfar_transmit, 0,
-					priv->gfargrp.int_name_tx,
-					&priv->gfargrp);
-		if (err) {
+		if ((err = request_irq(grp->interruptTransmit, gfar_transmit,
+				0, grp->int_name_tx, grp)) < 0) {
 			if (netif_msg_intr(priv))
-				pr_err("%s: Can't get IRQ %d\n", ndev->name,
-				       priv->gfargrp.interruptTransmit);
+				printk(KERN_ERR "%s: Can't get IRQ %d\n",
+					dev->name, grp->interruptTransmit);
 			goto tx_irq_fail;
 		}
 
-		err = request_irq(priv->gfargrp.interruptReceive,
-					gfar_receive, 0,
-					priv->gfargrp.int_name_rx,
-					&priv->gfargrp);
-		if (err) {
+		if ((err = request_irq(grp->interruptReceive, gfar_receive, 0,
+				grp->int_name_rx, grp)) < 0) {
 			if (netif_msg_intr(priv))
-				pr_err("%s: Can't get IRQ %d (receive0)\n",
-					ndev->name,
-					priv->gfargrp.interruptReceive);
+				printk(KERN_ERR "%s: Can't get IRQ %d\n",
+					dev->name, grp->interruptReceive);
 			goto rx_irq_fail;
 		}
 	} else {
-		err = request_irq(priv->gfargrp.interruptTransmit,
-					gfar_interrupt, 0,
-					priv->gfargrp.int_name_tx,
-					&priv->gfargrp);
-		if (err) {
+		if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0,
+				grp->int_name_tx, grp)) < 0) {
 			if (netif_msg_intr(priv))
-				pr_err("%s: Can't get IRQ %d\n", ndev->name,
-				       priv->gfargrp.interruptTransmit);
+				printk(KERN_ERR "%s: Can't get IRQ %d\n",
+					dev->name, grp->interruptTransmit);
 			goto err_irq_fail;
 		}
 	}
 
+	return 0;
+
+rx_irq_fail:
+	free_irq(grp->interruptTransmit, grp);
+tx_irq_fail:
+	free_irq(grp->interruptError, grp);
+err_irq_fail:
+	return err;
+
+}
+
+/* Bring the controller up and running */
+int startup_gfar(struct net_device *ndev)
+{
+	struct gfar_private *priv = netdev_priv(ndev);
+	struct gfar __iomem *regs = NULL;
+	int err, i, j;
+
+	for (i = 0; i < priv->num_grps; i++) {
+		regs= priv->gfargrp[i].regs;
+		gfar_write(&regs->imask, IMASK_INIT_CLEAR);
+	}
+
+	regs= priv->gfargrp[0].regs;
+	err = gfar_alloc_skb_resources(ndev);
+	if (err)
+		return err;
+
+	gfar_init_mac(ndev);
+
+	for (i = 0; i < priv->num_grps; i++) {
+		err = register_grp_irqs(&priv->gfargrp[i]);
+		if (err) {
+			for (j = 0; j < i; j++)
+				free_grp_irqs(&priv->gfargrp[j]);
+				goto irq_fail;
+		}
+	}
+
 	/* Start the controller */
 	gfar_start(ndev);
 
 	phy_start(priv->phydev);
 
+	gfar_configure_coalescing(priv, 0xFF, 0xFF);
+
 	return 0;
 
-rx_irq_fail:
-	free_irq(priv->gfargrp.interruptTransmit, &priv->gfargrp);
-tx_irq_fail:
-	free_irq(priv->gfargrp.interruptError, &priv->gfargrp);
-err_irq_fail:
+irq_fail:
 	free_skb_resources(priv);
 	return err;
 }
@@ -1547,7 +1726,7 @@ static int gfar_enet_open(struct net_device *dev)
 	struct gfar_private *priv = netdev_priv(dev);
 	int err;
 
-	napi_enable(&priv->gfargrp.napi);
+	enable_napi(priv);
 
 	skb_queue_head_init(&priv->rx_recycle);
 
@@ -1559,13 +1738,13 @@ static int gfar_enet_open(struct net_device *dev)
 	err = init_phy(dev);
 
 	if (err) {
-		napi_disable(&priv->gfargrp.napi);
+		disable_napi(priv);
 		return err;
 	}
 
 	err = startup_gfar(dev);
 	if (err) {
-		napi_disable(&priv->gfargrp.napi);
+		disable_napi(priv);
 		return err;
 	}
 
@@ -1654,7 +1833,7 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	tx_queue = priv->tx_queue[rq];
 	txq = netdev_get_tx_queue(dev, rq);
 	base = tx_queue->tx_bd_base;
-	regs = priv->gfargrp.regs;
+	regs = tx_queue->grp->regs;
 
 	/* make space for additional header when fcb is needed */
 	if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
@@ -1791,7 +1970,7 @@ static int gfar_close(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
 
-	napi_disable(&priv->gfargrp.napi);
+	disable_napi(priv);
 
 	skb_queue_purge(&priv->rx_recycle);
 	cancel_work_sync(&priv->reset_task);
@@ -1824,7 +2003,7 @@ static void gfar_vlan_rx_register(struct net_device *dev,
 	unsigned long flags;
 	u32 tempval;
 
-	regs = priv->gfargrp.regs;
+	regs = priv->gfargrp[0].regs;
 	local_irq_save(flags);
 	lock_rx_qs(priv);
 
@@ -1868,7 +2047,7 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu)
 {
 	int tempsize, tempval;
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	int oldsize = priv->rx_buffer_size;
 	int frame_size = new_mtu + ETH_HLEN;
 
@@ -2290,7 +2469,7 @@ static int gfar_poll(struct napi_struct *napi, int budget)
 	struct gfar_priv_grp *gfargrp = container_of(napi,
 			struct gfar_priv_grp, napi);
 	struct gfar_private *priv = gfargrp->priv;
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = gfargrp->regs;
 	struct gfar_priv_tx_q *tx_queue = NULL;
 	struct gfar_priv_rx_q *rx_queue = NULL;
 	int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
@@ -2349,14 +2528,8 @@ static int gfar_poll(struct napi_struct *napi, int budget)
 
 		/* If we are coalescing interrupts, update the timer */
 		/* Otherwise, clear it */
-		if (likely(rx_queue->rxcoalescing)) {
-			gfar_write(&regs->rxic, 0);
-			gfar_write(&regs->rxic, rx_queue->rxic);
-		}
-		if (likely(tx_queue->txcoalescing)) {
-			gfar_write(&regs->txic, 0);
-			gfar_write(&regs->txic, tx_queue->txic);
-		}
+		gfar_configure_coalescing(priv,
+				gfargrp->rx_bit_map, gfargrp->tx_bit_map);
 	}
 
 	return rx_cleaned;
@@ -2371,20 +2544,26 @@ static int gfar_poll(struct napi_struct *napi, int budget)
 static void gfar_netpoll(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
+	int i = 0;
 
 	/* If the device has multiple interrupts, run tx/rx */
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
-		disable_irq(priv->gfargrp.interruptTransmit);
-		disable_irq(priv->gfargrp.interruptReceive);
-		disable_irq(priv->gfargrp.interruptError);
-		gfar_interrupt(priv->gfargrp.interruptTransmit, &priv->gfargrp);
-		enable_irq(priv->gfargrp.interruptError);
-		enable_irq(priv->gfargrp.interruptReceive);
-		enable_irq(priv->gfargrp.interruptTransmit);
+		for (i = 0; i < priv->num_grps; i++) {
+			disable_irq(priv->gfargrp[i].interruptTransmit);
+			disable_irq(priv->gfargrp[i].interruptReceive);
+			disable_irq(priv->gfargrp[i].interruptError);
+			gfar_interrupt(priv->gfargrp[i].interruptTransmit,
+						&priv->gfargrp[i]);
+			enable_irq(priv->gfargrp[i].interruptError);
+			enable_irq(priv->gfargrp[i].interruptReceive);
+			enable_irq(priv->gfargrp[i].interruptTransmit);
+		}
 	} else {
-		disable_irq(priv->gfargrp.interruptTransmit);
-		gfar_interrupt(priv->gfargrp.interruptTransmit, &priv->gfargrp);
-		enable_irq(priv->gfargrp.interruptTransmit);
+		for (i = 0; i < priv->num_grps; i++) {
+			disable_irq(priv->gfargrp[i].interruptTransmit);
+			gfar_interrupt(priv->gfargrp[i].interruptTransmit,
+						&priv->gfargrp[i]);
+			enable_irq(priv->gfargrp[i].interruptTransmit);
 	}
 }
 #endif
@@ -2421,7 +2600,7 @@ static irqreturn_t gfar_interrupt(int irq, void *grp_id)
 static void adjust_link(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned long flags;
 	struct phy_device *phydev = priv->phydev;
 	int new_state = 0;
@@ -2505,7 +2684,7 @@ static void gfar_set_multi(struct net_device *dev)
 {
 	struct dev_mc_list *mc_ptr;
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u32 tempval;
 
 	if (dev->flags & IFF_PROMISC) {
@@ -2638,7 +2817,7 @@ static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
 static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	int idx;
 	char tmpbuf[MAC_ADDR_LEN];
 	u32 tempval;
@@ -2742,6 +2921,9 @@ static struct of_device_id gfar_match[] =
 		.type = "network",
 		.compatible = "gianfar",
 	},
+	{
+		.compatible = "fsl,etsec2",
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, gfar_match);

drivers/net/gianfar.h

@@ -79,6 +79,9 @@ extern const char gfar_driver_version[];
 #define MAX_TX_QS	0x8
 #define MAX_RX_QS	0x8
 
+/* MAXIMUM NUMBER OF GROUPS SUPPORTED */
+#define MAXGROUPS 0x2
+
 /* These need to be powers of 2 for this driver */
 #define DEFAULT_TX_RING_SIZE	256
 #define DEFAULT_RX_RING_SIZE	256
@@ -795,7 +798,24 @@ struct gfar {
 #define FSL_GIANFAR_DEV_HAS_BD_STASHING		0x00000200
 #define FSL_GIANFAR_DEV_HAS_BUF_STASHING	0x00000400
 
+#if (MAXGROUPS == 2)
+#define DEFAULT_MAPPING 	0xAA
+#else
 #define DEFAULT_MAPPING 	0xFF
+#endif
+
+#define ISRG_SHIFT_TX	0x10
+#define ISRG_SHIFT_RX	0x18
+
+/* The same driver can operate in two modes */
+/* SQ_SG_MODE: Single Queue Single Group Mode
+ * 		(Backward compatible mode)
+ * MQ_MG_MODE: Multi Queue Multi Group mode
+ */
+enum {
+	SQ_SG_MODE = 0,
+	MQ_MG_MODE
+};
 
 /**
  *	struct gfar_priv_tx_q - per tx queue structure
@@ -825,6 +845,7 @@ struct gfar_priv_tx_q {
 	struct	txbd8 *cur_tx;
 	struct	txbd8 *dirty_tx;
 	struct	net_device *dev;
+	struct gfar_priv_grp *grp;
 	u16	skb_curtx;
 	u16	skb_dirtytx;
 	u16	qindex;
@@ -858,6 +879,7 @@ struct gfar_priv_rx_q {
 	struct	rxbd8 *rx_bd_base;
 	struct	rxbd8 *cur_rx;
 	struct	net_device *dev;
+	struct gfar_priv_grp *grp;
 	u16	skb_currx;
 	u16	qindex;
 	unsigned int	rx_ring_size;
@@ -885,6 +907,7 @@ struct gfar_priv_grp {
 	struct	napi_struct napi;
 	struct gfar_private *priv;
 	struct gfar __iomem *regs;
+	unsigned int grp_id;
 	unsigned int rx_bit_map;
 	unsigned int tx_bit_map;
 	unsigned int num_tx_queues;
@@ -916,6 +939,8 @@ struct gfar_private {
 	/* Indicates how many tx, rx queues are enabled */
 	unsigned int num_tx_queues;
 	unsigned int num_rx_queues;
+	unsigned int num_grps;
+	unsigned int mode;
 
 	/* The total tx and rx ring size for the enabled queues */
 	unsigned int total_tx_ring_size;
@@ -925,7 +950,7 @@ struct gfar_private {
 	struct net_device *ndev;
 	struct of_device *ofdev;
 
-	struct gfar_priv_grp gfargrp;
+	struct gfar_priv_grp gfargrp[MAXGROUPS];
 	struct gfar_priv_tx_q *tx_queue[MAX_TX_QS];
 	struct gfar_priv_rx_q *rx_queue[MAX_RX_QS];
 
@@ -999,6 +1024,8 @@ extern void stop_gfar(struct net_device *dev);
 extern void gfar_halt(struct net_device *dev);
 extern void gfar_phy_test(struct mii_bus *bus, struct phy_device *phydev,
 		int enable, u32 regnum, u32 read);
+extern void gfar_configure_coalescing(struct gfar_private *priv,
+		unsigned int tx_mask, unsigned int rx_mask);
 void gfar_init_sysfs(struct net_device *dev);
 
 extern const struct ethtool_ops gfar_ethtool_ops;

drivers/net/gianfar_ethtool.c

@@ -137,7 +137,7 @@ static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
 {
 	int i;
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	u64 *extra = (u64 *) & priv->extra_stats;
 
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
@@ -226,7 +226,7 @@ static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, voi
 {
 	int i;
 	struct gfar_private *priv = netdev_priv(dev);
-	u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp.regs;
+	u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs;
 	u32 *buf = (u32 *) regbuf;
 
 	for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
@@ -352,22 +352,23 @@ static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals
 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct gfar __iomem *regs = priv->gfargrp.regs;
-	struct gfar_priv_tx_q *tx_queue = NULL;
-	struct gfar_priv_rx_q *rx_queue = NULL;
+	int i = 0;
 
 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
 		return -EOPNOTSUPP;
 
-	tx_queue = priv->tx_queue[0];
-	rx_queue = priv->rx_queue[0];
-
 	/* Set up rx coalescing */
+	/* As of now, we will enable/disable coalescing for all
+	 * queues together in case of eTSEC2, this will be modified
+	 * along with the ethtool interface */
 	if ((cvals->rx_coalesce_usecs == 0) ||
-	    (cvals->rx_max_coalesced_frames == 0))
-		rx_queue->rxcoalescing = 0;
-	else
-		rx_queue->rxcoalescing = 1;
+	    (cvals->rx_max_coalesced_frames == 0)) {
+		for (i = 0; i < priv->num_rx_queues; i++)
+			priv->rx_queue[i]->rxcoalescing = 0;
+	} else {
+		for (i = 0; i < priv->num_rx_queues; i++)
+			priv->rx_queue[i]->rxcoalescing = 1;
+	}
 
 	if (NULL == priv->phydev)
 		return -ENODEV;
@@ -385,15 +386,21 @@ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals
 		return -EINVAL;
 	}
 
-	rx_queue->rxic = mk_ic_value(cvals->rx_max_coalesced_frames,
-		gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
+	for (i = 0; i < priv->num_rx_queues; i++) {
+		priv->rx_queue[i]->rxic = mk_ic_value(
+			cvals->rx_max_coalesced_frames,
+			gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
+	}
 
 	/* Set up tx coalescing */
 	if ((cvals->tx_coalesce_usecs == 0) ||
-	    (cvals->tx_max_coalesced_frames == 0))
-		tx_queue->txcoalescing = 0;
-	else
-		tx_queue->txcoalescing = 1;
+	    (cvals->tx_max_coalesced_frames == 0)) {
+		for (i = 0; i < priv->num_tx_queues; i++)
+			priv->tx_queue[i]->txcoalescing = 0;
+	} else {
+		for (i = 0; i < priv->num_tx_queues; i++)
+			priv->tx_queue[i]->txcoalescing = 1;
+	}
 
 	/* Check the bounds of the values */
 	if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
@@ -408,16 +415,13 @@ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals
 		return -EINVAL;
 	}
 
-	tx_queue->txic = mk_ic_value(cvals->tx_max_coalesced_frames,
-		gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
-
-	gfar_write(&regs->rxic, 0);
-	if (rx_queue->rxcoalescing)
-		gfar_write(&regs->rxic, rx_queue->rxic);
+	for (i = 0; i < priv->num_tx_queues; i++) {
+		priv->tx_queue[i]->txic = mk_ic_value(
+			cvals->tx_max_coalesced_frames,
+			gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
+	}
 
-	gfar_write(&regs->txic, 0);
-	if (tx_queue->txcoalescing)
-		gfar_write(&regs->txic, tx_queue->txic);
+	gfar_configure_coalescing(priv, 0xFF, 0xFF);
 
 	return 0;
 }

drivers/net/gianfar_sysfs.c

@@ -50,7 +50,7 @@ static ssize_t gfar_set_bd_stash(struct device *dev,
 				 const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	int new_setting = 0;
 	u32 temp;
 	unsigned long flags;
@@ -105,7 +105,7 @@ static ssize_t gfar_set_rx_stash_size(struct device *dev,
 				      const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int length = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -164,7 +164,7 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev,
 				       const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned short index = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -212,7 +212,7 @@ static ssize_t gfar_set_fifo_threshold(struct device *dev,
 				       const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int length = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -252,7 +252,7 @@ static ssize_t gfar_set_fifo_starve(struct device *dev,
 				    const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int num = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;
@@ -293,7 +293,7 @@ static ssize_t gfar_set_fifo_starve_off(struct device *dev,
 					const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
-	struct gfar __iomem *regs = priv->gfargrp.regs;
+	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int num = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;