adding support for VLAN interface for cpsw.
CPSW VLAN Capability
* Can filter VLAN packets in Hardware
Signed-off-by: Mugunthan V N <mugunthanvnm@xxxxxx>
---
Documentation/devicetree/bindings/net/cpsw.txt | 2 +
drivers/net/ethernet/ti/cpsw.c | 108 +++++++++++++++++++++++-
include/linux/platform_data/cpsw.h | 1 +
3 files changed, 110 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
index 6ddd028..99696bf 100644
--- a/Documentation/devicetree/bindings/net/cpsw.txt
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -24,6 +24,8 @@ Required properties:
Optional properties:
- ti,hwmods : Must be "cpgmac0"
- no_bd_ram : Must be 0 or 1
+- default_vlan : Specifies Default VLAN for non tagged packets
+ ALE processing
Note: "ti,hwmods" field is used to fetch the base address and irq
resources from TI, omap hwmod data base during device registration.
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index b35e6a7..dee6951 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -32,6 +32,7 @@
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/of_device.h>
+#include <linux/if_vlan.h>
#include <linux/platform_data/cpsw.h>
@@ -72,6 +73,11 @@ do { \
dev_notice(priv->dev, format, ## __VA_ARGS__); \
} while (0)
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+#define VLAN_SUPPORT
+#define CPSW_VLAN_AWARE_MODE
+#endif
+
#define ALE_ALL_PORTS 0x7
#define CPSW_MAJOR_VERSION(reg) (reg >> 8 & 0x7)
@@ -118,6 +124,14 @@ do { \
#define TX_PRIORITY_MAPPING 0x33221100
#define CPDMA_TX_PRIORITY_MAP 0x76543210
+#ifdef CPSW_VLAN_AWARE_MODE
+#define CPSW_VLAN_AWARE BIT(1)
+#define CPSW_ALE_VLAN_AWARE 1
+#else
+#define CPSW_VLAN_AWARE 0x0
+#define CPSW_ALE_VLAN_AWARE 0
+#endif
+
#define cpsw_enable_irq(priv) \
do { \
u32 i; \
@@ -607,14 +621,44 @@ static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
}
}
+#ifdef VLAN_SUPPORT
+static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
+{
+ writel(priv->data.default_vlan, &priv->host_port_regs->port_vlan);
+ if (priv->version == CPSW_VERSION_1) {
+ slave_write(&priv->slaves[0], priv->data.default_vlan,
+ CPSW1_PORT_VLAN);
+ slave_write(&priv->slaves[1], priv->data.default_vlan,
+ CPSW1_PORT_VLAN);
+ } else {
+ slave_write(&priv->slaves[0], priv->data.default_vlan,
+ CPSW2_PORT_VLAN);
+ slave_write(&priv->slaves[1], priv->data.default_vlan,
+ CPSW2_PORT_VLAN);
+ }
+ cpsw_ale_add_vlan(priv->ale, priv->data.default_vlan,
+ ALE_ALL_PORTS << priv->host_port,
+ ALE_ALL_PORTS << priv->host_port,
+ ALE_ALL_PORTS << priv->host_port, 0);
+}
+#else
+#define cpsw_add_default_vlan(priv)
+#endif
+
static void cpsw_init_host_port(struct cpsw_priv *priv)
{
+ u32 control_reg;
+
/* soft reset the controller and initialize ale */
soft_reset("cpsw", &priv->regs->soft_reset);
cpsw_ale_start(priv->ale);
/* switch to vlan unaware mode */
- cpsw_ale_control_set(priv->ale, 0, ALE_VLAN_AWARE, 0);
+ cpsw_ale_control_set(priv->ale, priv->host_port, ALE_VLAN_AWARE,
+ CPSW_ALE_VLAN_AWARE);
+ control_reg = readl(&priv->regs->control);
+ control_reg |= CPSW_VLAN_AWARE;
+ writel(control_reg, &priv->regs->control);
/* setup host port priority mapping */
__raw_writel(CPDMA_TX_PRIORITY_MAP,
@@ -650,6 +694,9 @@ static int cpsw_ndo_open(struct net_device *ndev)
cpsw_init_host_port(priv);
for_each_slave(priv, cpsw_slave_open, priv);
+ /* Add default VLAN */
+ cpsw_add_default_vlan(priv);
+
/* setup tx dma to fixed prio and zero offset */
cpdma_control_set(priv->dma, CPDMA_TX_PRIO_FIXED, 1);
cpdma_control_set(priv->dma, CPDMA_RX_BUFFER_OFFSET, 0);
@@ -933,6 +980,54 @@ static void cpsw_ndo_poll_controller(struct net_device *ndev)
}
#endif
+#ifdef VLAN_SUPPORT
+
+static inline void cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
+ unsigned short vid)
+{
+ cpsw_ale_add_vlan(priv->ale, vid, ALE_ALL_PORTS << priv->host_port,
+ 0, ALE_ALL_PORTS << priv->host_port,
+ (BIT(1) | BIT(2)) << priv->host_port);
+ cpsw_ale_vlan_add_ucast(priv->ale, priv->mac_addr,
+ priv->host_port, 0, vid);
+ cpsw_ale_vlan_add_mcast(priv->ale, priv->ndev->broadcast,
+ ALE_ALL_PORTS << priv->host_port, vid, 0, 0);
+}
+
+static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
+ unsigned short vid)
+{
+ struct cpsw_priv *priv = netdev_priv(ndev);
+
+ spin_lock(&priv->lock);
+
+ dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
+ cpsw_add_vlan_ale_entry(priv, vid);
+
+ spin_unlock(&priv->lock);
+ return 0;
+}
+
+static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
+ unsigned short vid)
+{
+ struct cpsw_priv *priv = netdev_priv(ndev);
+
+ spin_lock(&priv->lock);
+
+ dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
+ cpsw_ale_del_vlan(priv->ale, vid, ALE_ALL_PORTS << priv->host_port);
+ cpsw_ale_vlan_del_ucast(priv->ale, priv->mac_addr,
+ priv->host_port, vid);
+ cpsw_ale_vlan_del_mcast(priv->ale, priv->ndev->broadcast, 0, vid);
+
+ spin_unlock(&priv->lock);
+ return 0;
+}
+
+#endif /* VLAN_SUPPORT */
+
+
static const struct net_device_ops cpsw_netdev_ops = {
.ndo_open = cpsw_ndo_open,
.ndo_stop = cpsw_ndo_stop,
@@ -947,6 +1042,10 @@ static const struct net_device_ops cpsw_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = cpsw_ndo_poll_controller,
#endif
+#ifdef VLAN_SUPPORT
+ .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
+#endif
};
static void cpsw_get_drvinfo(struct net_device *ndev,
@@ -1103,6 +1202,9 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
}
data->mac_control = prop;
+ if (!of_property_read_u32(node, "default_vlan", &prop))
+ data->default_vlan = prop;
+
/*
* Populate all the child nodes here...
*/
@@ -1356,6 +1458,10 @@ static int cpsw_probe(struct platform_device *pdev)
k++;
}
+#ifdef VLAN_SUPPORT
+ ndev->features |= NETIF_F_HW_VLAN_FILTER;
+#endif
+
ndev->flags |= IFF_ALLMULTI; /* see cpsw_ndo_change_rx_flags() */
ndev->netdev_ops = &cpsw_netdev_ops;
diff --git a/include/linux/platform_data/cpsw.h b/include/linux/platform_data/cpsw.h
index 24368a2..e962cfd 100644
--- a/include/linux/platform_data/cpsw.h
+++ b/include/linux/platform_data/cpsw.h
@@ -35,6 +35,7 @@ struct cpsw_platform_data {
u32 bd_ram_size; /*buffer descriptor ram size */
u32 rx_descs; /* Number of Rx Descriptios */
u32 mac_control; /* Mac control register */
+ u16 default_vlan; /* Def VLAN for ALE lookup in VLAN aware mode*/
};
#endif /* __CPSW_H__ */
--
1.7.9.5
--
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