[PATCH v4 2/2] drivers: net:ethernet: cpsw: add support for VLAN
Mugunthan V N
mugunthanvnm at ti.com
Tue Feb 5 13:26:48 EST 2013
adding support for VLAN interface for cpsw.
CPSW VLAN Capability
* Can filter VLAN packets in Hardware
Signed-off-by: Mugunthan V N <mugunthanvnm at ti.com>
---
drivers/net/ethernet/ti/cpsw.c | 106 +++++++++++++++++++++++++++++++++++-
drivers/net/ethernet/ti/cpsw_ale.h | 4 ++
include/linux/platform_data/cpsw.h | 1 +
3 files changed, 109 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 534bf7b..888708c 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>
@@ -118,6 +119,9 @@ do { \
#define TX_PRIORITY_MAPPING 0x33221100
#define CPDMA_TX_PRIORITY_MAP 0x76543210
+#define CPSW_VLAN_AWARE BIT(1)
+#define CPSW_ALE_VLAN_AWARE 1
+
#define cpsw_enable_irq(priv) \
do { \
u32 i; \
@@ -607,14 +611,40 @@ static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
}
}
+static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
+{
+ const int vlan = priv->data.default_vlan;
+ const int port = priv->host_port;
+ u32 reg;
+ int i;
+
+ reg = (priv->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
+ CPSW2_PORT_VLAN;
+
+ writel(vlan, &priv->host_port_regs->port_vlan);
+
+ for (i = 0; i < 2; i++)
+ slave_write(priv->slaves + i, vlan, reg);
+
+ cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS << port,
+ ALE_ALL_PORTS << port, ALE_ALL_PORTS << port,
+ (ALE_PORT_1 | ALE_PORT_2) << port);
+}
+
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 +680,9 @@ 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 +966,73 @@ static void cpsw_ndo_poll_controller(struct net_device *ndev)
}
#endif
+static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
+ unsigned short vid)
+{
+ int ret;
+
+ ret = cpsw_ale_add_vlan(priv->ale, vid,
+ ALE_ALL_PORTS << priv->host_port,
+ 0, ALE_ALL_PORTS << priv->host_port,
+ (ALE_PORT_1 | ALE_PORT_2) << priv->host_port);
+ if (ret != 0)
+ return ret;
+
+ ret = cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
+ priv->host_port, ALE_VLAN, vid);
+ if (ret != 0)
+ goto clean_vid;
+
+ ret = cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
+ ALE_ALL_PORTS << priv->host_port,
+ ALE_VLAN, vid, 0);
+ if (ret != 0)
+ goto clean_vlan_ucast;
+ return 0;
+
+clean_vlan_ucast:
+ cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
+ priv->host_port, ALE_VLAN, vid);
+clean_vid:
+ cpsw_ale_del_vlan(priv->ale, vid, 0);
+ return ret;
+}
+
+static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
+ unsigned short vid)
+{
+ struct cpsw_priv *priv = netdev_priv(ndev);
+
+ if (vid == priv->data.default_vlan)
+ return 0;
+
+ dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
+ return cpsw_add_vlan_ale_entry(priv, vid);
+}
+
+static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
+ unsigned short vid)
+{
+ struct cpsw_priv *priv = netdev_priv(ndev);
+ int ret;
+
+ if (vid == priv->data.default_vlan)
+ return 0;
+
+ dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
+ ret = cpsw_ale_del_vlan(priv->ale, vid, 0);
+ if (ret != 0)
+ return ret;
+
+ ret = cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
+ priv->host_port, ALE_VLAN, vid);
+ if (ret != 0)
+ return ret;
+
+ return cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
+ 0, ALE_VLAN, vid);
+}
+
static const struct net_device_ops cpsw_netdev_ops = {
.ndo_open = cpsw_ndo_open,
.ndo_stop = cpsw_ndo_stop,
@@ -947,6 +1047,8 @@ static const struct net_device_ops cpsw_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = cpsw_ndo_poll_controller,
#endif
+ .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
};
static void cpsw_get_drvinfo(struct net_device *ndev,
@@ -1354,7 +1456,7 @@ static int cpsw_probe(struct platform_device *pdev)
k++;
}
- ndev->flags |= IFF_ALLMULTI; /* see cpsw_ndo_change_rx_flags() */
+ ndev->features |= NETIF_F_HW_VLAN_FILTER;
ndev->netdev_ops = &cpsw_netdev_ops;
SET_ETHTOOL_OPS(ndev, &cpsw_ethtool_ops);
diff --git a/drivers/net/ethernet/ti/cpsw_ale.h b/drivers/net/ethernet/ti/cpsw_ale.h
index a002417..30daa12 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.h
+++ b/drivers/net/ethernet/ti/cpsw_ale.h
@@ -69,6 +69,10 @@ enum cpsw_ale_port_state {
#define ALE_SUPER BIT(2)
#define ALE_VLAN BIT(3)
+#define ALE_PORT_HOST BIT(0)
+#define ALE_PORT_1 BIT(1)
+#define ALE_PORT_2 BIT(2)
+
#define ALE_MCAST_FWD 0
#define ALE_MCAST_BLOCK_LEARN_FWD 1
#define ALE_MCAST_FWD_LEARN 2
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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