Driver should define ndo_swdev_festures_get and indicate which switch
features it supports.
Signed-off-by: Jiri Pirko <j...@resnulli.us>
---
include/linux/netdevice.h | 5 +++++
include/net/switchdev.h | 18 ++++++++++++++++++
net/switchdev/switchdev.c | 33 +++++++++++++++++++++++++++++++++
3 files changed, 56 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 034baca..b87d0cc 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1006,6 +1006,10 @@ typedef u16 (*select_queue_fallback_t)(struct net_device
*dev,
* If driver implements this, it indicates that it represents a port
* of a switch chip.
*
+ * swdev_features_t (*ndo_swdev_features_get)(struct net_device *dev);
+ * Called to get a list of features the switch chip this port is part of
+ * supports.
+ *
* int (*ndo_swdev_flow_insert)(struct net_device *dev,
* const struct swdev_flow *flow);
* Called to insert a flow into switch device. If driver does
@@ -1169,6 +1173,7 @@ struct net_device_ops {
#ifdef CONFIG_NET_SWITCHDEV
int (*ndo_swdev_id_get)(struct net_device *dev,
struct netdev_phys_item_id
*psid);
+ swdev_features_t (*ndo_swdev_features_get)(struct net_device
*dev);
int (*ndo_swdev_flow_insert)(struct net_device *dev,
const struct
swdev_flow *flow);
int (*ndo_swdev_flow_remove)(struct net_device *dev,
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 060d3fc..91cdb47 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -12,6 +12,18 @@
#include <linux/netdevice.h>
+typedef u64 swdev_features_t;
+
+enum {
+ SWDEV_F_FLOW_MATCH_KEY_BIT, /* Supports fixed key match */
+ /**/SWDEV_FEATURE_COUNT
+};
+
+#define __SWDEV_F_BIT(bit) ((swdev_features_t)1 << (bit))
+#define __SWDEV_F(name) __SWDEV_F_BIT(SWDEV_F_##name##_BIT)
+
+#define SWDEV_F_FLOW_MATCH_KEY __SWDEV_F(FLOW_MATCH_KEY)
+
struct swdev_flow_match_key {
struct {
u32 priority; /* Packet QoS priority. */
@@ -114,6 +126,7 @@ static inline struct swdev_flow *swdev_flow_alloc(unsigned
action_count,
#ifdef CONFIG_NET_SWITCHDEV
int swdev_id_get(struct net_device *dev, struct netdev_phys_item_id *psid);
+swdev_features_t swdev_features_get(struct net_device *dev);
int swdev_flow_insert(struct net_device *dev, const struct swdev_flow *flow);
int swdev_flow_remove(struct net_device *dev, const struct swdev_flow *flow);
@@ -125,6 +138,11 @@ static inline int swdev_id_get(struct net_device *dev,
return -EOPNOTSUPP;
}
+static inline swdev_features_t swdev_features_get(struct net_device *dev)
+{
+ return 0;
+}
+
static inline int swdev_flow_insert(struct net_device *dev,
const struct swdev_flow *flow)
{
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 90bc5e4..5348125 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -31,6 +31,22 @@ int swdev_id_get(struct net_device *dev, struct
netdev_phys_item_id *psid)
}
EXPORT_SYMBOL(swdev_id_get);
+/**
+ * swdev_features_get - Get list of features switch supports
+ * @dev: port device
+ *
+ * Get list of features switch this port is part of supports.
+ */
+swdev_features_t swdev_features_get(struct net_device *dev)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+
+ if (!ops->ndo_swdev_features_get)
+ return 0;
+ return ops->ndo_swdev_features_get(dev);
+}
+EXPORT_SYMBOL(swdev_features_get);
+
static void print_flow_key_phy(const char *prefix,
const struct swdev_flow_match_key *key)
{
@@ -116,6 +132,15 @@ static void print_flow(const struct swdev_flow *flow,
struct net_device *dev,
print_flow_actions(flow->action, flow->action_count);
}
+static int check_match_type_features(struct net_device *dev,
+ const struct swdev_flow *flow)
+{
+ if (flow->match.type == SW_FLOW_MATCH_TYPE_KEY &&
+ !(swdev_features_get(dev) & SWDEV_F_FLOW_MATCH_KEY))
+ return -EOPNOTSUPP;
+ return 0;
+}
+
/**
* swdev_flow_insert - Insert a flow into switch
* @dev: port device
@@ -126,10 +151,14 @@ static void print_flow(const struct swdev_flow *flow,
struct net_device *dev,
int swdev_flow_insert(struct net_device *dev, const struct swdev_flow *flow)
{
const struct net_device_ops *ops = dev->netdev_ops;
+ int err;
print_flow(flow, dev, "insert");
if (!ops->ndo_swdev_flow_insert)
return -EOPNOTSUPP;
+ err = check_match_type_features(dev, flow);
+ if (err)
+ return err;
WARN_ON(!ops->ndo_swdev_id_get);
return ops->ndo_swdev_flow_insert(dev, flow);
}
@@ -145,10 +174,14 @@ EXPORT_SYMBOL(swdev_flow_insert);
int swdev_flow_remove(struct net_device *dev, const struct swdev_flow *flow)
{
const struct net_device_ops *ops = dev->netdev_ops;
+ int err;
print_flow(flow, dev, "remove");
if (!ops->ndo_swdev_flow_remove)
return -EOPNOTSUPP;
+ err = check_match_type_features(dev, flow);
+ if (err)
+ return err;
WARN_ON(!ops->ndo_swdev_id_get);
return ops->ndo_swdev_flow_remove(dev, flow);
}
--
1.9.3
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