1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
new file mode 100644
index 000000000000..ea56f6ade6b4
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
@@ -0,0 +1,351 @@
+/*
+ * drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
+ * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2017 Arkadi Sharshevsky <arakdis@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the names of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * 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 <linux/kernel.h>
+#include <net/devlink.h>
+
+#include "spectrum.h"
+#include "spectrum_dpipe.h"
+#include "spectrum_router.h"
+
+enum mlxsw_sp_field_metadata_id {
+	MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT,
+	MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD,
+	MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP,
+};
+
+static struct devlink_dpipe_field mlxsw_sp_dpipe_fields_metadata[] = {
+	{ .name = "erif_port",
+	  .id = MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT,
+	  .bitwidth = 32,
+	  .mapping_type = DEVLINK_DPIPE_FIELD_MAPPING_TYPE_IFINDEX,
+	},
+	{ .name = "l3_forward",
+	  .id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD,
+	  .bitwidth = 1,
+	},
+	{ .name = "l3_drop",
+	  .id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP,
+	  .bitwidth = 1,
+	},
+};
+
+enum mlxsw_sp_dpipe_header_id {
+	MLXSW_SP_DPIPE_HEADER_METADATA,
+};
+
+static struct devlink_dpipe_header mlxsw_sp_dpipe_header_metadata = {
+	.name = "mlxsw_meta",
+	.id = MLXSW_SP_DPIPE_HEADER_METADATA,
+	.fields = mlxsw_sp_dpipe_fields_metadata,
+	.fields_count = ARRAY_SIZE(mlxsw_sp_dpipe_fields_metadata),
+};
+
+static struct devlink_dpipe_header *mlxsw_dpipe_headers[] = {
+	&mlxsw_sp_dpipe_header_metadata,
+};
+
+static struct devlink_dpipe_headers mlxsw_sp_dpipe_headers = {
+	.headers = mlxsw_dpipe_headers,
+	.headers_count = ARRAY_SIZE(mlxsw_dpipe_headers),
+};
+
+static int mlxsw_sp_dpipe_table_erif_actions_dump(void *priv,
+						  struct sk_buff *skb)
+{
+	struct devlink_dpipe_action action = {0};
+	int err;
+
+	action.type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
+	action.header = &mlxsw_sp_dpipe_header_metadata;
+	action.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD;
+
+	err = devlink_dpipe_action_put(skb, &action);
+	if (err)
+		return err;
+
+	action.type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
+	action.header = &mlxsw_sp_dpipe_header_metadata;
+	action.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP;
+
+	return devlink_dpipe_action_put(skb, &action);
+}
+
+static int mlxsw_sp_dpipe_table_erif_matches_dump(void *priv,
+						  struct sk_buff *skb)
+{
+	struct devlink_dpipe_match match = {0};
+
+	match.type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
+	match.header = &mlxsw_sp_dpipe_header_metadata;
+	match.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT;
+
+	return devlink_dpipe_match_put(skb, &match);
+}
+
+static void mlxsw_sp_erif_entry_clear(struct devlink_dpipe_entry *entry)
+{
+	unsigned int value_count, value_index;
+	struct devlink_dpipe_value *value;
+
+	value = entry->action_values;
+	value_count = entry->action_values_count;
+	for (value_index = 0; value_index < value_count; value_index++) {
+		kfree(value[value_index].value);
+		kfree(value[value_index].mask);
+	}
+
+	value = entry->match_values;
+	value_count = entry->match_values_count;
+	for (value_index = 0; value_index < value_count; value_index++) {
+		kfree(value[value_index].value);
+		kfree(value[value_index].mask);
+	}
+}
+
+static void
+mlxsw_sp_erif_match_action_prepare(struct devlink_dpipe_match *match,
+				   struct devlink_dpipe_action *action)
+{
+	action->type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
+	action->header = &mlxsw_sp_dpipe_header_metadata;
+	action->field_id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD;
+
+	match->type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
+	match->header = &mlxsw_sp_dpipe_header_metadata;
+	match->field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT;
+}
+
+static int mlxsw_sp_erif_entry_prepare(struct devlink_dpipe_entry *entry,
+				       struct devlink_dpipe_value *match_value,
+				       struct devlink_dpipe_match *match,
+				       struct devlink_dpipe_value *action_value,
+				       struct devlink_dpipe_action *action)
+{
+	entry->match_values = match_value;
+	entry->match_values_count = 1;
+
+	entry->action_values = action_value;
+	entry->action_values_count = 1;
+
+	match_value->match = match;
+	match_value->value_size = sizeof(u32);
+	match_value->value = kmalloc(match_value->value_size, GFP_KERNEL);
+	if (!match_value->value)
+		return -ENOMEM;
+
+	action_value->action = action;
+	action_value->value_size = sizeof(u32);
+	action_value->value = kmalloc(action_value->value_size, GFP_KERNEL);
+	if (!action_value->value)
+		goto err_action_alloc;
+	return 0;
+
+err_action_alloc:
+	kfree(match_value->value);
+	return -ENOMEM;
+}
+
+static int mlxsw_sp_erif_entry_get(struct mlxsw_sp *mlxsw_sp,
+				   struct devlink_dpipe_entry *entry,
+				   struct mlxsw_sp_rif *rif,
+				   bool counters_enabled)
+{
+	u32 *action_value;
+	u32 *rif_value;
+	u64 cnt;
+	int err;
+
+	/* Set Match RIF index */
+	rif_value = entry->match_values->value;
+	*rif_value = mlxsw_sp_rif_index(rif);
+	entry->match_values->mapping_value = mlxsw_sp_rif_dev_ifindex(rif);
+	entry->match_values->mapping_valid = true;
+
+	/* Set Action Forwarding */
+	action_value = entry->action_values->value;
+	*action_value = 1;
+
+	entry->counter_valid = false;
+	entry->counter = 0;
+	if (!counters_enabled)
+		return 0;
+
+	entry->index = mlxsw_sp_rif_index(rif);
+	err = mlxsw_sp_rif_counter_value_get(mlxsw_sp, rif,
+					     MLXSW_SP_RIF_COUNTER_EGRESS,
+					     &cnt);
+	if (!err) {
+		entry->counter = cnt;
+		entry->counter_valid = true;
+	}
+	return 0;
+}
+
+static int
+mlxsw_sp_table_erif_entries_dump(void *priv, bool counters_enabled,
+				 struct devlink_dpipe_dump_ctx *dump_ctx)
+{
+	struct devlink_dpipe_value match_value = {{0}}, action_value = {{0}};
+	struct devlink_dpipe_action action = {0};
+	struct devlink_dpipe_match match = {0};
+	struct devlink_dpipe_entry entry = {0};
+	struct mlxsw_sp *mlxsw_sp = priv;
+	unsigned int rif_count;
+	int i, j;
+	int err;
+
+	mlxsw_sp_erif_match_action_prepare(&match, &action);
+	err = mlxsw_sp_erif_entry_prepare(&entry, &match_value, &match,
+					  &action_value, &action);
+	if (err)
+		return err;
+
+	rif_count = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
+	rtnl_lock();
+	i = 0;
+start_again:
+	err = devlink_dpipe_entry_ctx_prepare(dump_ctx);
+	if (err)
+		return err;
+	j = 0;
+	for (; i < rif_count; i++) {
+		if (!mlxsw_sp->rifs[i])
+			continue;
+		err = mlxsw_sp_erif_entry_get(mlxsw_sp, &entry,
+					      mlxsw_sp->rifs[i],
+					      counters_enabled);
+		if (err)
+			goto err_entry_get;
+		err = devlink_dpipe_entry_ctx_append(dump_ctx, &entry);
+		if (err) {
+			if (err == -EMSGSIZE) {
+				if (!j)
+					goto err_entry_append;
+				break;
+			}
+			goto err_entry_append;
+		}
+		j++;
+	}
+
+	devlink_dpipe_entry_ctx_close(dump_ctx);
+	if (i != rif_count)
+		goto start_again;
+	rtnl_unlock();
+
+	mlxsw_sp_erif_entry_clear(&entry);
+	return 0;
+err_entry_append:
+err_entry_get:
+	rtnl_unlock();
+	mlxsw_sp_erif_entry_clear(&entry);
+	return err;
+}
+
+static int mlxsw_sp_table_erif_counters_update(void *priv, bool enable)
+{
+	struct mlxsw_sp *mlxsw_sp = priv;
+	int i;
+
+	rtnl_lock();
+	for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) {
+		if (!mlxsw_sp->rifs[i])
+			continue;
+		if (enable)
+			mlxsw_sp_rif_counter_alloc(mlxsw_sp,
+						   mlxsw_sp->rifs[i],
+						   MLXSW_SP_RIF_COUNTER_EGRESS);
+		else
+			mlxsw_sp_rif_counter_free(mlxsw_sp,
+						  mlxsw_sp->rifs[i],
+						  MLXSW_SP_RIF_COUNTER_EGRESS);
+	}
+	rtnl_unlock();
+	return 0;
+}
+
+static struct devlink_dpipe_table_ops mlxsw_sp_erif_ops = {
+	.matches_dump = mlxsw_sp_dpipe_table_erif_matches_dump,
+	.actions_dump = mlxsw_sp_dpipe_table_erif_actions_dump,
+	.entries_dump = mlxsw_sp_table_erif_entries_dump,
+	.counters_set_update = mlxsw_sp_table_erif_counters_update,
+};
+
+static int mlxsw_sp_dpipe_erif_table_init(struct mlxsw_sp *mlxsw_sp)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+	u64 table_size;
+
+	table_size = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
+	return devlink_dpipe_table_register(devlink,
+					    MLXSW_SP_DPIPE_TABLE_NAME_ERIF,
+					    &mlxsw_sp_erif_ops,
+					    mlxsw_sp, table_size,
+					    false);
+}
+
+static void mlxsw_sp_dpipe_erif_table_fini(struct mlxsw_sp *mlxsw_sp)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+
+	devlink_dpipe_table_unregister(devlink, MLXSW_SP_DPIPE_TABLE_NAME_ERIF);
+}
+
+int mlxsw_sp_dpipe_init(struct mlxsw_sp *mlxsw_sp)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+	int err;
+
+	err = devlink_dpipe_headers_register(devlink,
+					     &mlxsw_sp_dpipe_headers);
+	if (err)
+		return err;
+	err = mlxsw_sp_dpipe_erif_table_init(mlxsw_sp);
+	if (err)
+		goto err_erif_register;
+	return 0;
+
+err_erif_register:
+	devlink_dpipe_headers_unregister(priv_to_devlink(mlxsw_sp->core));
+	return err;
+}
+
+void mlxsw_sp_dpipe_fini(struct mlxsw_sp *mlxsw_sp)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+
+	mlxsw_sp_dpipe_erif_table_fini(mlxsw_sp);
+	devlink_dpipe_headers_unregister(devlink);
+}