From 7605dbd0ad8d96fd70cc8c15cf5626ae2b849206 Mon Sep 17 00:00:00 2001
From: Andy Fleming <afleming@freescale.com>
Date: Wed, 4 Feb 2009 16:43:44 -0800
Subject: [PATCH] --- yaml --- r: 134294 b: refs/heads/master c:
 4d7902f22b0804730b80f7a4147f676430248a3a h: refs/heads/master v: v3

---
 [refs]                                        |  2 +-
 .../powerpc/dts-bindings/fsl/tsec.txt         |  6 +++++
 trunk/drivers/net/gianfar.c                   | 23 +++++++++++++++++++
 trunk/drivers/net/gianfar_sysfs.c             | 12 +++++++---
 4 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index 9bad5264fad9..66abcd1b8853 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0fd56bb5be6455d0d42241e65aed057244665e5e
+refs/heads/master: 4d7902f22b0804730b80f7a4147f676430248a3a
diff --git a/trunk/Documentation/powerpc/dts-bindings/fsl/tsec.txt b/trunk/Documentation/powerpc/dts-bindings/fsl/tsec.txt
index 7fa4b27574b5..edb7ae19e868 100644
--- a/trunk/Documentation/powerpc/dts-bindings/fsl/tsec.txt
+++ b/trunk/Documentation/powerpc/dts-bindings/fsl/tsec.txt
@@ -56,6 +56,12 @@ Properties:
     hardware.
   - fsl,magic-packet : If present, indicates that the hardware supports
     waking up via magic packet.
+  - bd-stash : If present, indicates that the hardware supports stashing
+    buffer descriptors in the L2.
+  - rx-stash-len : Denotes the number of bytes of a received buffer to stash
+    in the L2.
+  - rx-stash-idx : Denotes the index of the first byte from the received
+    buffer to stash in the L2.
 
 Example:
 	ethernet@24000 {
diff --git a/trunk/drivers/net/gianfar.c b/trunk/drivers/net/gianfar.c
index 33de25602b32..dadd08cd801b 100644
--- a/trunk/drivers/net/gianfar.c
+++ b/trunk/drivers/net/gianfar.c
@@ -164,6 +164,9 @@ static int gfar_of_init(struct net_device *dev)
 	struct gfar_private *priv = netdev_priv(dev);
 	struct device_node *np = priv->node;
 	char bus_name[MII_BUS_ID_SIZE];
+	const u32 *stash;
+	const u32 *stash_len;
+	const u32 *stash_idx;
 
 	if (!np || !of_device_is_available(np))
 		return -ENODEV;
@@ -193,6 +196,26 @@ static int gfar_of_init(struct net_device *dev)
 		}
 	}
 
+	stash = of_get_property(np, "bd-stash", NULL);
+
+	if(stash) {
+		priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
+		priv->bd_stash_en = 1;
+	}
+
+	stash_len = of_get_property(np, "rx-stash-len", NULL);
+
+	if (stash_len)
+		priv->rx_stash_size = *stash_len;
+
+	stash_idx = of_get_property(np, "rx-stash-idx", NULL);
+
+	if (stash_idx)
+		priv->rx_stash_index = *stash_idx;
+
+	if (stash_len || stash_idx)
+		priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
+
 	mac_addr = of_get_mac_address(np);
 	if (mac_addr)
 		memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN);
diff --git a/trunk/drivers/net/gianfar_sysfs.c b/trunk/drivers/net/gianfar_sysfs.c
index 74e0b4d42587..dd26da74f27a 100644
--- a/trunk/drivers/net/gianfar_sysfs.c
+++ b/trunk/drivers/net/gianfar_sysfs.c
@@ -53,6 +53,9 @@ static ssize_t gfar_set_bd_stash(struct device *dev,
 	u32 temp;
 	unsigned long flags;
 
+	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
+		return count;
+
 	/* Find out the new setting */
 	if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
 		new_setting = 1;
@@ -100,6 +103,9 @@ static ssize_t gfar_set_rx_stash_size(struct device *dev,
 	u32 temp;
 	unsigned long flags;
 
+	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
+		return count;
+
 	spin_lock_irqsave(&priv->rxlock, flags);
 	if (length > priv->rx_buffer_size)
 		goto out;
@@ -152,6 +158,9 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev,
 	u32 temp;
 	unsigned long flags;
 
+	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
+		return count;
+
 	spin_lock_irqsave(&priv->rxlock, flags);
 	if (index > priv->rx_stash_size)
 		goto out;
@@ -294,12 +303,9 @@ void gfar_init_sysfs(struct net_device *dev)
 	int rc;
 
 	/* Initialize the default values */
-	priv->rx_stash_size = DEFAULT_STASH_LENGTH;
-	priv->rx_stash_index = DEFAULT_STASH_INDEX;
 	priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
 	priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
 	priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
-	priv->bd_stash_en = DEFAULT_BD_STASH;
 
 	/* Create our sysfs files */
 	rc = device_create_file(&dev->dev, &dev_attr_bd_stash);