[PATCH] gianfar: Add support enhanced TSEC features on the MPC 8548

Jeff,

Just incase this got lost in the recent netdev mailing list transition
here is a nicer version of Andy's patch for gianfar.

- kumar

* TCP/IP/UDP checksumming and verification
* VLAN tag insertion/extraction
* Larger multicast hash-table
* Padding to align IP headers

Also added:
* msg lvl support
* Some whitespace cleanup

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>

1 files changed, 153 insertions, 124 deletions

diff --git a/drivers/net/gianfar_ethtool.c b/drivers/net/gianfar_ethtool.c
index 28046e9e88ba..a451de629197 100644
--- a/drivers/net/gianfar_ethtool.c
+++ b/drivers/net/gianfar_ethtool.c
@@ -46,16 +46,18 @@
 
 extern int startup_gfar(struct net_device *dev);
 extern void stop_gfar(struct net_device *dev);
-extern void gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
+extern void gfar_halt(struct net_device *dev);
+extern void gfar_start(struct net_device *dev);
+extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
 
-void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
+static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
 		     u64 * buf);
-void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
-int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
-int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
-void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
-int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
-void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
+static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
+static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
+static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
+static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
+static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
+static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
 
 static char stat_gstrings[][ETH_GSTRING_LEN] = {
 	"rx-dropped-by-kernel",
@@ -118,57 +120,56 @@ static char stat_gstrings[][ETH_GSTRING_LEN] = {
 	"tx-fragmented-frames",
 };
 
+/* Fill in a buffer with the strings which correspond to the
+ * stats */
+static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
+{
+	struct gfar_private *priv = netdev_priv(dev);
+	
+	if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
+		memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
+	else
+		memcpy(buf, stat_gstrings,
+				GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
+}
+
 /* Fill in an array of 64-bit statistics from various sources.
  * This array will be appended to the end of the ethtool_stats
  * structure, and returned to user space
  */
-void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
+static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
 {
 	int i;
 	struct gfar_private *priv = netdev_priv(dev);
-	u32 *rmon = (u32 *) & priv->regs->rmon;
 	u64 *extra = (u64 *) & priv->extra_stats;
-	struct gfar_stats *stats = (struct gfar_stats *) buf;
 
-	for (i = 0; i < GFAR_RMON_LEN; i++) {
-		stats->rmon[i] = (u64) (rmon[i]);
-	}
-
-	for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
-		stats->extra[i] = extra[i];
-	}
-}
+	if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
+		u32 *rmon = (u32 *) & priv->regs->rmon;
+		struct gfar_stats *stats = (struct gfar_stats *) buf;
 
-/* Returns the number of stats (and their corresponding strings) */
-int gfar_stats_count(struct net_device *dev)
-{
-	return GFAR_STATS_LEN;
-}
+		for (i = 0; i < GFAR_RMON_LEN; i++)
+			stats->rmon[i] = (u64) (rmon[i]);
 
-void gfar_gstrings_normon(struct net_device *dev, u32 stringset, u8 * buf)
-{
-	memcpy(buf, stat_gstrings, GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
+		for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
+			stats->extra[i] = extra[i];
+	} else
+		for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
+			buf[i] = extra[i];
 }
 
-void gfar_fill_stats_normon(struct net_device *dev, 
-		struct ethtool_stats *dummy, u64 * buf)
+/* Returns the number of stats (and their corresponding strings) */
+static int gfar_stats_count(struct net_device *dev)
 {
-	int i;
 	struct gfar_private *priv = netdev_priv(dev);
-	u64 *extra = (u64 *) & priv->extra_stats;
 
-	for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
-		buf[i] = extra[i];
-	}
+	if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
+		return GFAR_STATS_LEN;
+	else
+		return GFAR_EXTRA_STATS_LEN;
 }
 
-
-int gfar_stats_count_normon(struct net_device *dev)
-{
-	return GFAR_EXTRA_STATS_LEN;
-}
 /* Fills in the drvinfo structure with some basic info */
-void gfar_gdrvinfo(struct net_device *dev, struct
+static void gfar_gdrvinfo(struct net_device *dev, struct
 	      ethtool_drvinfo *drvinfo)
 {
 	strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
@@ -182,7 +183,7 @@ void gfar_gdrvinfo(struct net_device *dev, struct
 }
 
 /* Return the current settings in the ethtool_cmd structure */
-int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
+static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
 	struct gfar_private *priv = netdev_priv(dev);
 	uint gigabit_support = 
@@ -216,13 +217,13 @@ int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
 }
 
 /* Return the length of the register structure */
-int gfar_reglen(struct net_device *dev)
+static int gfar_reglen(struct net_device *dev)
 {
 	return sizeof (struct gfar);
 }
 
 /* Return a dump of the GFAR register space */
-void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
+static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
 {
 	int i;
 	struct gfar_private *priv = netdev_priv(dev);
@@ -233,13 +234,6 @@ void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regb
 		buf[i] = theregs[i];
 }
 
-/* Fill in a buffer with the strings which correspond to the
- * stats */
-void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
-{
-	memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
-}
-
 /* Convert microseconds to ethernet clock ticks, which changes
  * depending on what speed the controller is running at */
 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
@@ -291,9 +285,12 @@ static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int tic
 
 /* Get the coalescing parameters, and put them in the cvals
  * structure.  */
-int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
+static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 {
 	struct gfar_private *priv = netdev_priv(dev);
+	
+	if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
+		return -EOPNOTSUPP;
 
 	cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
 	cvals->rx_max_coalesced_frames = priv->rxcount;
@@ -337,10 +334,13 @@ int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
  * Both cvals->*_usecs and cvals->*_frames have to be > 0
  * in order for coalescing to be active
  */
-int gfar_scoalesce(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);
 
+	if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
+		return -EOPNOTSUPP;
+
 	/* Set up rx coalescing */
 	if ((cvals->rx_coalesce_usecs == 0) ||
 	    (cvals->rx_max_coalesced_frames == 0))
@@ -379,7 +379,7 @@ int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 /* Fills in rvals with the current ring parameters.  Currently,
  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
  * jumbo are ignored by the driver */
-void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
+static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 {
 	struct gfar_private *priv = netdev_priv(dev);
 
@@ -401,9 +401,8 @@ void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
  * necessary so that we don't mess things up while we're in
  * motion.  We wait for the ring to be clean before reallocating
  * the rings. */
-int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
+static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 {
-	u32 tempval;
 	struct gfar_private *priv = netdev_priv(dev);
 	int err = 0;
 
@@ -425,37 +424,54 @@ int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 		return -EINVAL;
 	}
 
-	/* Stop the controller so we don't rx any more frames */
-	/* But first, make sure we clear the bits */
-	tempval = gfar_read(&priv->regs->dmactrl);
-	tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
-	gfar_write(&priv->regs->dmactrl, tempval);
+	if (dev->flags & IFF_UP) {
+		unsigned long flags;
 
-	tempval = gfar_read(&priv->regs->dmactrl);
-	tempval |= (DMACTRL_GRS | DMACTRL_GTS);
-	gfar_write(&priv->regs->dmactrl, tempval);
+		/* Halt TX and RX, and process the frames which
+		 * have already been received */
+		spin_lock_irqsave(&priv->lock, flags);
+		gfar_halt(dev);
+		gfar_clean_rx_ring(dev, priv->rx_ring_size);
+		spin_unlock_irqrestore(&priv->lock, flags);
 
-	while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
-		cpu_relax();
+		/* Now we take down the rings to rebuild them */
+		stop_gfar(dev);
+	}
 
-	/* Note that rx is not clean right now */
-	priv->rxclean = 0;
+	/* Change the size */
+	priv->rx_ring_size = rvals->rx_pending;
+	priv->tx_ring_size = rvals->tx_pending;
 
-	if (dev->flags & IFF_UP) {
-		/* Tell the driver to process the rest of the frames */
-		gfar_receive(0, (void *) dev, NULL);
+	/* Rebuild the rings with the new size */
+	if (dev->flags & IFF_UP)
+		err = startup_gfar(dev);
 
-		/* Now wait for it to be done */
-		wait_event_interruptible(priv->rxcleanupq, priv->rxclean);
+	return err;
+}
 
-		/* Ok, all packets have been handled.  Now we bring it down,
-		 * change the ring size, and bring it up */
+static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
+{
+	struct gfar_private *priv = netdev_priv(dev);
+	int err = 0;
 
+	if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
+		return -EOPNOTSUPP;
+
+	if (dev->flags & IFF_UP) {
+		unsigned long flags;
+
+		/* Halt TX and RX, and process the frames which
+		 * have already been received */
+		spin_lock_irqsave(&priv->lock, flags);
+		gfar_halt(dev);
+		gfar_clean_rx_ring(dev, priv->rx_ring_size);
+		spin_unlock_irqrestore(&priv->lock, flags);
+
+		/* Now we take down the rings to rebuild them */
 		stop_gfar(dev);
 	}
 
-	priv->rx_ring_size = rvals->rx_pending;
-	priv->tx_ring_size = rvals->tx_pending;
+	priv->rx_csum_enable = data;
 
 	if (dev->flags & IFF_UP)
 		err = startup_gfar(dev);
@@ -463,6 +479,61 @@ int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 	return err;
 }
 
+static uint32_t gfar_get_rx_csum(struct net_device *dev)
+{
+	struct gfar_private *priv = netdev_priv(dev);
+
+	if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
+		return 0;
+
+	return priv->rx_csum_enable;
+}
+
+static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
+{
+	unsigned long flags;
+	struct gfar_private *priv = netdev_priv(dev);
+
+	if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
+		return -EOPNOTSUPP;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	gfar_halt(dev);
+
+	if (data)
+		dev->features |= NETIF_F_IP_CSUM;
+	else
+		dev->features &= ~NETIF_F_IP_CSUM;
+
+	gfar_start(dev);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static uint32_t gfar_get_tx_csum(struct net_device *dev)
+{
+	struct gfar_private *priv = netdev_priv(dev);
+
+	if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
+		return 0;
+
+	return (dev->features & NETIF_F_IP_CSUM) != 0;
+}
+
+static uint32_t gfar_get_msglevel(struct net_device *dev)
+{       
+	struct gfar_private *priv = netdev_priv(dev);
+	return priv->msg_enable;
+}       
+        
+static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
+{       
+	struct gfar_private *priv = netdev_priv(dev);
+	priv->msg_enable = data;
+}
+
+
 struct ethtool_ops gfar_ethtool_ops = {
 	.get_settings = gfar_gsettings,
 	.get_drvinfo = gfar_gdrvinfo,
@@ -476,52 +547,10 @@ struct ethtool_ops gfar_ethtool_ops = {
 	.get_strings = gfar_gstrings,
 	.get_stats_count = gfar_stats_count,
 	.get_ethtool_stats = gfar_fill_stats,
-};
-
-struct ethtool_ops gfar_normon_nocoalesce_ethtool_ops = {
-	.get_settings = gfar_gsettings,
-	.get_drvinfo = gfar_gdrvinfo,
-	.get_regs_len = gfar_reglen,
-	.get_regs = gfar_get_regs,
-	.get_link = ethtool_op_get_link,
-	.get_ringparam = gfar_gringparam,
-	.set_ringparam = gfar_sringparam,
-	.get_strings = gfar_gstrings_normon,
-	.get_stats_count = gfar_stats_count_normon,
-	.get_ethtool_stats = gfar_fill_stats_normon,
-};
-
-struct ethtool_ops gfar_nocoalesce_ethtool_ops = {
-	.get_settings = gfar_gsettings,
-	.get_drvinfo = gfar_gdrvinfo,
-	.get_regs_len = gfar_reglen,
-	.get_regs = gfar_get_regs,
-	.get_link = ethtool_op_get_link,
-	.get_ringparam = gfar_gringparam,
-	.set_ringparam = gfar_sringparam,
-	.get_strings = gfar_gstrings,
-	.get_stats_count = gfar_stats_count,
-	.get_ethtool_stats = gfar_fill_stats,
-};
-
-struct ethtool_ops gfar_normon_ethtool_ops = {
-	.get_settings = gfar_gsettings,
-	.get_drvinfo = gfar_gdrvinfo,
-	.get_regs_len = gfar_reglen,
-	.get_regs = gfar_get_regs,
-	.get_link = ethtool_op_get_link,
-	.get_coalesce = gfar_gcoalesce,
-	.set_coalesce = gfar_scoalesce,
-	.get_ringparam = gfar_gringparam,
-	.set_ringparam = gfar_sringparam,
-	.get_strings = gfar_gstrings_normon,
-	.get_stats_count = gfar_stats_count_normon,
-	.get_ethtool_stats = gfar_fill_stats_normon,
-};
-
-struct ethtool_ops *gfar_op_array[] = {
-	&gfar_ethtool_ops,
-	&gfar_normon_ethtool_ops,
-	&gfar_nocoalesce_ethtool_ops,
-	&gfar_normon_nocoalesce_ethtool_ops
+	.get_rx_csum = gfar_get_rx_csum,
+	.get_tx_csum = gfar_get_tx_csum,
+	.set_rx_csum = gfar_set_rx_csum,
+	.set_tx_csum = gfar_set_tx_csum,
+	.get_msglevel = gfar_get_msglevel,
+	.set_msglevel = gfar_set_msglevel,
 };