mlx5: support VLAN filtering

[dpdk.git] / drivers / net / mlx5 / mlx5_vlan.c

diff --git a/drivers/net/mlx5/mlx5_vlan.c b/drivers/net/mlx5/mlx5_vlan.c
new file mode 100644 (file)
index 0000000..ca80571
--- /dev/null
+++ b/drivers/net/mlx5/mlx5_vlan.c
@@ -0,0 +1,156 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright 2015 6WIND S.A.
+ *   Copyright 2015 Mellanox.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of 6WIND S.A. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stddef.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdint.h>
+
+/* DPDK headers don't like -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-pedantic"
+#endif
+#include <rte_ethdev.h>
+#include <rte_common.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-pedantic"
+#endif
+
+#include "mlx5_utils.h"
+#include "mlx5.h"
+
+/**
+ * Configure a VLAN filter.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param vlan_id
+ *   VLAN ID to filter.
+ * @param on
+ *   Toggle filter.
+ *
+ * @return
+ *   0 on success, errno value on failure.
+ */
+static int
+vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+       struct priv *priv = dev->data->dev_private;
+       unsigned int i;
+       unsigned int r;
+       struct rxq *rxq;
+
+       DEBUG("%p: %s VLAN filter ID %" PRIu16,
+             (void *)dev, (on ? "enable" : "disable"), vlan_id);
+       assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
+       for (i = 0; (i != priv->vlan_filter_n); ++i)
+               if (priv->vlan_filter[i] == vlan_id)
+                       break;
+       /* Check if there's room for another VLAN filter. */
+       if (i == RTE_DIM(priv->vlan_filter))
+               return ENOMEM;
+       if (i < priv->vlan_filter_n) {
+               assert(priv->vlan_filter_n != 0);
+               /* Enabling an existing VLAN filter has no effect. */
+               if (on)
+                       return 0;
+               /* Remove VLAN filter from list. */
+               --priv->vlan_filter_n;
+               memmove(&priv->vlan_filter[i],
+                       &priv->vlan_filter[i + 1],
+                       priv->vlan_filter_n - i);
+               priv->vlan_filter[priv->vlan_filter_n] = 0;
+       } else {
+               assert(i == priv->vlan_filter_n);
+               /* Disabling an unknown VLAN filter has no effect. */
+               if (!on)
+                       return 0;
+               /* Add new VLAN filter. */
+               priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
+               ++priv->vlan_filter_n;
+       }
+       if (!priv->started)
+               return 0;
+       /* Rehash MAC flows in all RX queues. */
+       if (priv->rss) {
+               rxq = &priv->rxq_parent;
+               r = 1;
+       } else {
+               rxq = (*priv->rxqs)[0];
+               r = priv->rxqs_n;
+       }
+       for (i = 0; (i < r); rxq = (*priv->rxqs)[++i]) {
+               int ret;
+
+               if (rxq == NULL)
+                       continue;
+               rxq_mac_addrs_del(rxq);
+               ret = rxq_mac_addrs_add(rxq);
+               if (!ret)
+                       continue;
+               /* Rollback. */
+               while (i != 0) {
+                       rxq = (*priv->rxqs)[--i];
+                       if (rxq != NULL)
+                               rxq_mac_addrs_del(rxq);
+               }
+               return ret;
+       }
+       return 0;
+}
+
+/**
+ * DPDK callback to configure a VLAN filter.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param vlan_id
+ *   VLAN ID to filter.
+ * @param on
+ *   Toggle filter.
+ *
+ * @return
+ *   0 on success, negative errno value on failure.
+ */
+int
+mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+       struct priv *priv = dev->data->dev_private;
+       int ret;
+
+       priv_lock(priv);
+       ret = vlan_filter_set(dev, vlan_id, on);
+       priv_unlock(priv);
+       assert(ret >= 0);
+       return -ret;
+}