net/mlx5: E-Switch, Add SR-IOV (FDB) support

Enabling E-Switch SRIOV for nvfs+1 vports.

Create E-Switch FDB for L2 UC/MC mac steering between VFs/PF and
external vport (Uplink).

FDB contains forwarding rules such as:
	UC MAC0 -> vport0(PF).
	UC MAC1 -> vport1.
	UC MAC2 -> vport2.
	MC MACX -> vport0, vport2, Uplink.
	MC MACY -> vport1, Uplink.

For unmatched traffic FDB has the following default rules:
	Unmached Traffic (src vport != Uplink) -> Uplink.
	Unmached Traffic (src vport == Uplink) -> vport0(PF).

FDB rules population:
Each NIC vport (VF) will notify E-Switch manager of its UC/MC vport
context changes via modify vport context command, which will be
translated to an event that will be handled by E-Switch manager (PF)
which will update FDB table accordingly.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/eswitch.c

@@ -34,9 +34,12 @@
 #include <linux/mlx5/driver.h>
 #include <linux/mlx5/mlx5_ifc.h>
 #include <linux/mlx5/vport.h>
+#include <linux/mlx5/flow_table.h>
 #include "mlx5_core.h"
 #include "eswitch.h"
 
+#define UPLINK_VPORT 0xFFFF
+
 #define MLX5_DEBUG_ESWITCH_MASK BIT(3)
 
 #define esw_info(dev, format, ...)				\
@@ -54,18 +57,26 @@ enum {
 	MLX5_ACTION_DEL  = 2,
 };
 
-/* HW UC L2 table hash node */
-struct mlx5_uc_l2addr {
+/* E-Switch UC L2 table hash node */
+struct esw_uc_addr {
 	struct l2addr_node node;
-	u8                 action;
 	u32                table_index;
 	u32                vport;
 };
 
-/* Vport UC L2 table hash node */
-struct mlx5_vport_addr {
-	struct l2addr_node node;
-	u8                 action;
+/* E-Switch MC FDB table hash node */
+struct esw_mc_addr { /* SRIOV only */
+	struct l2addr_node     node;
+	struct mlx5_flow_rule *uplink_rule; /* Forward to uplink rule */
+	u32                    refcnt;
+};
+
+/* Vport UC/MC hash node */
+struct vport_addr {
+	struct l2addr_node     node;
+	u8                     action;
+	u32                    vport;
+	struct mlx5_flow_rule *flow_rule; /* SRIOV only */
 };
 
 enum {
@@ -73,7 +84,11 @@ enum {
 	MC_ADDR_CHANGE = BIT(1),
 };
 
-static int arm_vport_context_events_cmd(struct mlx5_core_dev *dev, int vport,
+/* Vport context events */
+#define SRIOV_VPORT_EVENTS (UC_ADDR_CHANGE | \
+			    MC_ADDR_CHANGE)
+
+static int arm_vport_context_events_cmd(struct mlx5_core_dev *dev, u16 vport,
 					u32 events_mask)
 {
 	int in[MLX5_ST_SZ_DW(modify_nic_vport_context_in)];
@@ -196,97 +211,492 @@ static void del_l2_table_entry(struct mlx5_core_dev *dev, u32 index)
 	free_l2_table_index(l2_table, index);
 }
 
-/* SW E-Switch L2 Table management */
-static int l2_table_addr_add(struct mlx5_eswitch *esw,
-			     u8 mac[ETH_ALEN], u32 vport)
+/* E-Switch FDB flow steering */
+struct dest_node {
+	struct list_head list;
+	struct mlx5_flow_destination dest;
+};
+
+static int _mlx5_flow_rule_apply(struct mlx5_flow_rule *fr)
 {
-	struct hlist_head *hash;
-	struct mlx5_uc_l2addr *addr;
+	bool was_valid = fr->valid;
+	struct dest_node *dest_n;
+	u32 dest_list_size = 0;
+	void *in_match_value;
+	u32 *flow_context;
+	u32 flow_index;
 	int err;
+	int i;
+
+	if (list_empty(&fr->dest_list)) {
+		if (fr->valid)
+			mlx5_del_flow_table_entry(fr->ft, fr->fi);
+		fr->valid = false;
+		return 0;
+	}
+
+	list_for_each_entry(dest_n, &fr->dest_list, list)
+		dest_list_size++;
 
-	hash = esw->l2_table.l2_hash;
-	addr = l2addr_hash_find(hash, mac, struct mlx5_uc_l2addr);
-	if (addr) {
+	flow_context = mlx5_vzalloc(MLX5_ST_SZ_BYTES(flow_context) +
+				    MLX5_ST_SZ_BYTES(dest_format_struct) *
+				    dest_list_size);
+	if (!flow_context)
+		return -ENOMEM;
+
+	MLX5_SET(flow_context, flow_context, flow_tag, fr->flow_tag);
+	MLX5_SET(flow_context, flow_context, action, fr->action);
+	MLX5_SET(flow_context, flow_context, destination_list_size,
+		 dest_list_size);
+
+	i = 0;
+	list_for_each_entry(dest_n, &fr->dest_list, list) {
+		void *dest_addr = MLX5_ADDR_OF(flow_context, flow_context,
+					       destination[i++]);
+
+		MLX5_SET(dest_format_struct, dest_addr, destination_type,
+			 dest_n->dest.type);
+		MLX5_SET(dest_format_struct, dest_addr, destination_id,
+			 dest_n->dest.vport_num);
+	}
+
+	in_match_value = MLX5_ADDR_OF(flow_context, flow_context, match_value);
+	memcpy(in_match_value, fr->match_value, MLX5_ST_SZ_BYTES(fte_match_param));
+
+	err = mlx5_add_flow_table_entry(fr->ft, fr->match_criteria_enable,
+					fr->match_criteria, flow_context,
+					&flow_index);
+	if (!err) {
+		if (was_valid)
+			mlx5_del_flow_table_entry(fr->ft, fr->fi);
+		fr->fi = flow_index;
+		fr->valid = true;
+	}
+	kfree(flow_context);
+	return err;
+}
+
+static int mlx5_flow_rule_add_dest(struct mlx5_flow_rule *fr,
+				   struct mlx5_flow_destination *new_dest)
+{
+	struct dest_node *dest_n;
+	int err;
+
+	dest_n = kzalloc(sizeof(*dest_n), GFP_KERNEL);
+	if (!dest_n)
+		return -ENOMEM;
+
+	memcpy(&dest_n->dest, new_dest, sizeof(dest_n->dest));
+	mutex_lock(&fr->mutex);
+	list_add(&dest_n->list, &fr->dest_list);
+	err = _mlx5_flow_rule_apply(fr);
+	if (err) {
+		list_del(&dest_n->list);
+		kfree(dest_n);
+	}
+	mutex_unlock(&fr->mutex);
+	return err;
+}
+
+static int mlx5_flow_rule_del_dest(struct mlx5_flow_rule *fr,
+				   struct mlx5_flow_destination *dest)
+{
+	struct dest_node *dest_n;
+	struct dest_node *n;
+	int err;
+
+	mutex_lock(&fr->mutex);
+	list_for_each_entry_safe(dest_n, n, &fr->dest_list, list) {
+		if (dest->vport_num == dest_n->dest.vport_num)
+			goto found;
+	}
+	mutex_unlock(&fr->mutex);
+	return -ENOENT;
+
+found:
+	list_del(&dest_n->list);
+	err = _mlx5_flow_rule_apply(fr);
+	mutex_unlock(&fr->mutex);
+	kfree(dest_n);
+
+	return err;
+}
+
+static struct mlx5_flow_rule *find_fr(struct mlx5_eswitch *esw,
+				      u8 match_criteria_enable,
+				      u32 *match_value)
+{
+	struct hlist_head *hash = esw->mc_table;
+	struct esw_mc_addr *esw_mc;
+	u8 *dmac_v;
+
+	dmac_v = MLX5_ADDR_OF(fte_match_param, match_value,
+			      outer_headers.dmac_47_16);
+
+	/* UNICAST FULL MATCH */
+	if (!is_multicast_ether_addr(dmac_v))
+		return NULL;
+
+	/* MULTICAST FULL MATCH */
+	esw_mc = l2addr_hash_find(hash, dmac_v, struct esw_mc_addr);
+
+	return esw_mc ? esw_mc->uplink_rule : NULL;
+}
+
+static struct mlx5_flow_rule *alloc_fr(void *ft,
+				       u8 match_criteria_enable,
+				       u32 *match_criteria,
+				       u32 *match_value,
+				       u32 action,
+				       u32 flow_tag)
+{
+	struct mlx5_flow_rule *fr = kzalloc(sizeof(*fr), GFP_KERNEL);
+
+	if (!fr)
+		return NULL;
+
+	fr->match_criteria = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
+	fr->match_value = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
+	if (!fr->match_criteria || !fr->match_value) {
+		kfree(fr->match_criteria);
+		kfree(fr->match_value);
+		kfree(fr);
+		return NULL;
+	}
+
+	memcpy(fr->match_criteria, match_criteria, MLX5_ST_SZ_BYTES(fte_match_param));
+	memcpy(fr->match_value, match_value, MLX5_ST_SZ_BYTES(fte_match_param));
+	fr->match_criteria_enable = match_criteria_enable;
+	fr->flow_tag = flow_tag;
+	fr->action = action;
+
+	mutex_init(&fr->mutex);
+	INIT_LIST_HEAD(&fr->dest_list);
+	atomic_set(&fr->refcount, 0);
+	fr->ft = ft;
+	return fr;
+}
+
+static void deref_fr(struct mlx5_flow_rule *fr)
+{
+	if (!atomic_dec_and_test(&fr->refcount))
+		return;
+
+	kfree(fr->match_criteria);
+	kfree(fr->match_value);
+	kfree(fr);
+}
+
+static struct mlx5_flow_rule *
+mlx5_add_flow_rule(struct mlx5_eswitch *esw,
+		   u8 match_criteria_enable,
+		   u32 *match_criteria,
+		   u32 *match_value,
+		   u32 action,
+		   u32 flow_tag,
+		   struct mlx5_flow_destination *dest)
+{
+	struct mlx5_flow_rule *fr;
+	int err;
+
+	fr = find_fr(esw, match_criteria_enable, match_value);
+	fr = fr ? fr : alloc_fr(esw->fdb_table.fdb, match_criteria_enable, match_criteria,
+				match_value, action, flow_tag);
+	if (!fr)
+		return NULL;
+
+	atomic_inc(&fr->refcount);
+
+	err = mlx5_flow_rule_add_dest(fr, dest);
+	if (err) {
+		deref_fr(fr);
+		return NULL;
+	}
+
+	return fr;
+}
+
+static void mlx5_del_flow_rule(struct mlx5_flow_rule *fr, u32 vport)
+{
+	struct mlx5_flow_destination dest;
+
+	dest.vport_num = vport;
+	mlx5_flow_rule_del_dest(fr, &dest);
+	deref_fr(fr);
+}
+
+/* E-Switch FDB */
+static struct mlx5_flow_rule *
+esw_fdb_set_vport_rule(struct mlx5_eswitch *esw, u8 mac[ETH_ALEN], u32 vport)
+{
+	int match_header = MLX5_MATCH_OUTER_HEADERS;
+	struct mlx5_flow_destination dest;
+	struct mlx5_flow_rule *flow_rule = NULL;
+	u32 *match_v;
+	u32 *match_c;
+	u8 *dmac_v;
+	u8 *dmac_c;
+
+	match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
+	match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
+	if (!match_v || !match_c) {
+		pr_warn("FDB: Failed to alloc match parameters\n");
+		goto out;
+	}
+	dmac_v = MLX5_ADDR_OF(fte_match_param, match_v,
+			      outer_headers.dmac_47_16);
+	dmac_c = MLX5_ADDR_OF(fte_match_param, match_c,
+			      outer_headers.dmac_47_16);
+
+	ether_addr_copy(dmac_v, mac);
+	/* Match criteria mask */
+	memset(dmac_c, 0xff, 6);
+
+	dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
+	dest.vport_num = vport;
+
+	esw_debug(esw->dev,
+		  "\tFDB add rule dmac_v(%pM) dmac_c(%pM) -> vport(%d)\n",
+		  dmac_v, dmac_c, vport);
+	flow_rule =
+		mlx5_add_flow_rule(esw,
+				   match_header,
+				   match_c,
+				   match_v,
+				   MLX5_FLOW_CONTEXT_ACTION_FWD_DEST,
+				   0, &dest);
+	if (IS_ERR_OR_NULL(flow_rule)) {
+		pr_warn(
+			"FDB: Failed to add flow rule: dmac_v(%pM) dmac_c(%pM) -> vport(%d), err(%ld)\n",
+			 dmac_v, dmac_c, vport, PTR_ERR(flow_rule));
+		flow_rule = NULL;
+	}
+out:
+	kfree(match_v);
+	kfree(match_c);
+	return flow_rule;
+}
+
+static int esw_create_fdb_table(struct mlx5_eswitch *esw, int nvports)
+{
+	struct mlx5_core_dev *dev = esw->dev;
+	struct mlx5_flow_table_group g;
+	struct mlx5_flow_table *fdb;
+	u8 *dmac;
+
+	esw_debug(dev, "Create FDB log_max_size(%d)\n",
+		  MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size));
+
+	memset(&g, 0, sizeof(g));
+	/* UC MC Full match rules*/
+	g.log_sz = MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size);
+	g.match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
+	dmac = MLX5_ADDR_OF(fte_match_param, g.match_criteria,
+			    outer_headers.dmac_47_16);
+	/* Match criteria mask */
+	memset(dmac, 0xff, 6);
+
+	fdb = mlx5_create_flow_table(dev, 0,
+				     MLX5_FLOW_TABLE_TYPE_ESWITCH,
+				     1, &g);
+	if (fdb)
+		esw_debug(dev, "ESW: FDB Table created fdb->id %d\n", mlx5_get_flow_table_id(fdb));
+	else
+		esw_warn(dev, "ESW: Failed to create FDB Table\n");
+
+	esw->fdb_table.fdb = fdb;
+	return fdb ? 0 : -ENOMEM;
+}
+
+static void esw_destroy_fdb_table(struct mlx5_eswitch *esw)
+{
+	if (!esw->fdb_table.fdb)
+		return;
+
+	esw_debug(esw->dev, "Destroy FDB Table fdb(%d)\n",
+		  mlx5_get_flow_table_id(esw->fdb_table.fdb));
+	mlx5_destroy_flow_table(esw->fdb_table.fdb);
+	esw->fdb_table.fdb = NULL;
+}
+
+/* E-Switch vport UC/MC lists management */
+typedef int (*vport_addr_action)(struct mlx5_eswitch *esw,
+				 struct vport_addr *vaddr);
+
+static int esw_add_uc_addr(struct mlx5_eswitch *esw, struct vport_addr *vaddr)
+{
+	struct hlist_head *hash = esw->l2_table.l2_hash;
+	struct esw_uc_addr *esw_uc;
+	u8 *mac = vaddr->node.addr;
+	u32 vport = vaddr->vport;
+	int err;
+
+	esw_uc = l2addr_hash_find(hash, mac, struct esw_uc_addr);
+	if (esw_uc) {
 		esw_warn(esw->dev,
 			 "Failed to set L2 mac(%pM) for vport(%d), mac is already in use by vport(%d)\n",
-			 mac, vport, addr->vport);
+			 mac, vport, esw_uc->vport);
 		return -EEXIST;
 	}
 
-	addr = l2addr_hash_add(hash, mac, struct mlx5_uc_l2addr,
-			       GFP_KERNEL);
-	if (!addr)
+	esw_uc = l2addr_hash_add(hash, mac, struct esw_uc_addr, GFP_KERNEL);
+	if (!esw_uc)
 		return -ENOMEM;
+	esw_uc->vport = vport;
 
-	addr->vport = vport;
-	addr->action = MLX5_ACTION_NONE;
-	err = set_l2_table_entry(esw->dev, mac, 0, 0, &addr->table_index);
+	err = set_l2_table_entry(esw->dev, mac, 0, 0, &esw_uc->table_index);
 	if (err)
-		l2addr_hash_del(addr);
-	else
-		esw_debug(esw->dev, "\tADDED L2 MAC: vport[%d] %pM index:%d\n",
-			  vport, addr->node.addr, addr->table_index);
+		goto abort;
+
+	if (esw->fdb_table.fdb) /* SRIOV is enabled: Forward UC MAC to vport */
+		vaddr->flow_rule = esw_fdb_set_vport_rule(esw, mac, vport);
+
+	esw_debug(esw->dev, "\tADDED UC MAC: vport[%d] %pM index:%d fr(%p)\n",
+		  vport, mac, esw_uc->table_index, vaddr->flow_rule);
+	return err;
+abort:
+	l2addr_hash_del(esw_uc);
 	return err;
 }
 
-static int l2_table_addr_del(struct mlx5_eswitch *esw,
-			     u8 mac[ETH_ALEN], u32 vport)
+static int esw_del_uc_addr(struct mlx5_eswitch *esw, struct vport_addr *vaddr)
 {
-	struct hlist_head *hash;
-	struct mlx5_uc_l2addr *addr;
+	struct hlist_head *hash = esw->l2_table.l2_hash;
+	struct esw_uc_addr *esw_uc;
+	u8 *mac = vaddr->node.addr;
+	u32 vport = vaddr->vport;
+
+	esw_uc = l2addr_hash_find(hash, mac, struct esw_uc_addr);
+	if (!esw_uc || esw_uc->vport != vport) {
+		esw_debug(esw->dev,
+			  "MAC(%pM) doesn't belong to vport (%d)\n",
+			  mac, vport);
+		return -EINVAL;
+	}
+	esw_debug(esw->dev, "\tDELETE UC MAC: vport[%d] %pM index:%d fr(%p)\n",
+		  vport, mac, esw_uc->table_index, vaddr->flow_rule);
+
+	del_l2_table_entry(esw->dev, esw_uc->table_index);
+
+	if (vaddr->flow_rule)
+		mlx5_del_flow_rule(vaddr->flow_rule, vport);
+	vaddr->flow_rule = NULL;
+
+	l2addr_hash_del(esw_uc);
+	return 0;
+}
+
+static int esw_add_mc_addr(struct mlx5_eswitch *esw, struct vport_addr *vaddr)
+{
+	struct hlist_head *hash = esw->mc_table;
+	struct esw_mc_addr *esw_mc;
+	u8 *mac = vaddr->node.addr;
+	u32 vport = vaddr->vport;
+
+	if (!esw->fdb_table.fdb)
+		return 0;
+
+	esw_mc = l2addr_hash_find(hash, mac, struct esw_mc_addr);
+	if (esw_mc)
+		goto add;
+
+	esw_mc = l2addr_hash_add(hash, mac, struct esw_mc_addr, GFP_KERNEL);
+	if (!esw_mc)
+		return -ENOMEM;
+
+	esw_mc->uplink_rule = /* Forward MC MAC to Uplink */
+		esw_fdb_set_vport_rule(esw, mac, UPLINK_VPORT);
+add:
+	esw_mc->refcnt++;
+	/* Forward MC MAC to vport */
+	vaddr->flow_rule = esw_fdb_set_vport_rule(esw, mac, vport);
+	esw_debug(esw->dev,
+		  "\tADDED MC MAC: vport[%d] %pM fr(%p) refcnt(%d) uplinkfr(%p)\n",
+		  vport, mac, vaddr->flow_rule,
+		  esw_mc->refcnt, esw_mc->uplink_rule);
+	return 0;
+}
+
+static int esw_del_mc_addr(struct mlx5_eswitch *esw, struct vport_addr *vaddr)
+{
+	struct hlist_head *hash = esw->mc_table;
+	struct esw_mc_addr *esw_mc;
+	u8 *mac = vaddr->node.addr;
+	u32 vport = vaddr->vport;
 
-	hash = esw->l2_table.l2_hash;
-	addr = l2addr_hash_find(hash, mac, struct mlx5_uc_l2addr);
-	if (!addr || addr->vport != vport) {
-		esw_warn(esw->dev, "MAC(%pM) doesn't belong to vport (%d)\n",
+	if (!esw->fdb_table.fdb)
+		return 0;
+
+	esw_mc = l2addr_hash_find(hash, mac, struct esw_mc_addr);
+	if (!esw_mc) {
+		esw_warn(esw->dev,
+			 "Failed to find eswitch MC addr for MAC(%pM) vport(%d)",
 			 mac, vport);
 		return -EINVAL;
 	}
+	esw_debug(esw->dev,
+		  "\tDELETE MC MAC: vport[%d] %pM fr(%p) refcnt(%d) uplinkfr(%p)\n",
+		  vport, mac, vaddr->flow_rule, esw_mc->refcnt,
+		  esw_mc->uplink_rule);
 
-	esw_debug(esw->dev, "\tDELETE L2 MAC: vport[%d] %pM index:%d\n",
-		  vport, addr->node.addr, addr->table_index);
-	del_l2_table_entry(esw->dev, addr->table_index);
-	l2addr_hash_del(addr);
+	if (vaddr->flow_rule)
+		mlx5_del_flow_rule(vaddr->flow_rule, vport);
+	vaddr->flow_rule = NULL;
+
+	if (--esw_mc->refcnt)
+		return 0;
+
+	if (esw_mc->uplink_rule)
+		mlx5_del_flow_rule(esw_mc->uplink_rule, UPLINK_VPORT);
+
+	l2addr_hash_del(esw_mc);
 	return 0;
 }
 
-/* E-Switch vport uc list management */
-
-/* Apply vport uc list to HW l2 table */
-static void esw_apply_vport_uc_list(struct mlx5_eswitch *esw,
-				    u32 vport_num)
+/* Apply vport UC/MC list to HW l2 table and FDB table */
+static void esw_apply_vport_addr_list(struct mlx5_eswitch *esw,
+				      u32 vport_num, int list_type)
 {
 	struct mlx5_vport *vport = &esw->vports[vport_num];
-	struct mlx5_vport_addr *addr;
+	bool is_uc = list_type == MLX5_NVPRT_LIST_TYPE_UC;
+	vport_addr_action vport_addr_add;
+	vport_addr_action vport_addr_del;
+	struct vport_addr *addr;
 	struct l2addr_node *node;
 	struct hlist_head *hash;
 	struct hlist_node *tmp;
 	int hi;
 
-	hash = vport->uc_list;
+	vport_addr_add = is_uc ? esw_add_uc_addr :
+				 esw_add_mc_addr;
+	vport_addr_del = is_uc ? esw_del_uc_addr :
+				 esw_del_mc_addr;
+
+	hash = is_uc ? vport->uc_list : vport->mc_list;
 	for_each_l2hash_node(node, tmp, hash, hi) {
-		addr = container_of(node, struct mlx5_vport_addr, node);
+		addr = container_of(node, struct vport_addr, node);
 		switch (addr->action) {
 		case MLX5_ACTION_ADD:
-			l2_table_addr_add(esw, addr->node.addr, vport_num);
+			vport_addr_add(esw, addr);
 			addr->action = MLX5_ACTION_NONE;
 			break;
 		case MLX5_ACTION_DEL:
-			l2_table_addr_del(esw, addr->node.addr, vport_num);
+			vport_addr_del(esw, addr);
 			l2addr_hash_del(addr);
 			break;
 		}
 	}
 }
 
-/* Sync vport uc list from vport context */
-static void esw_update_vport_uc_list(struct mlx5_eswitch *esw,
-				     u32 vport_num)
+/* Sync vport UC/MC list from vport context */
+static void esw_update_vport_addr_list(struct mlx5_eswitch *esw,
+				       u32 vport_num, int list_type)
 {
 	struct mlx5_vport *vport = &esw->vports[vport_num];
-	struct mlx5_vport_addr *addr;
-	struct l2addr_node *node;
+	bool is_uc = list_type == MLX5_NVPRT_LIST_TYPE_UC;
 	u8 (*mac_list)[ETH_ALEN];
+	struct l2addr_node *node;
+	struct vport_addr *addr;
 	struct hlist_head *hash;
 	struct hlist_node *tmp;
 	int size;
@@ -294,40 +704,41 @@ static void esw_update_vport_uc_list(struct mlx5_eswitch *esw,
 	int hi;
 	int i;
 
-	size = MLX5_MAX_UC_PER_VPORT(esw->dev);
+	size = is_uc ? MLX5_MAX_UC_PER_VPORT(esw->dev) :
+		       MLX5_MAX_MC_PER_VPORT(esw->dev);
 
 	mac_list = kcalloc(size, ETH_ALEN, GFP_KERNEL);
 	if (!mac_list)
 		return;
 
-	hash = vport->uc_list;
+	hash = is_uc ? vport->uc_list : vport->mc_list;
 
 	for_each_l2hash_node(node, tmp, hash, hi) {
-		addr = container_of(node, struct mlx5_vport_addr, node);
+		addr = container_of(node, struct vport_addr, node);
 		addr->action = MLX5_ACTION_DEL;
 	}
 
-	err = mlx5_query_nic_vport_mac_list(esw->dev, vport_num,
-					    MLX5_NVPRT_LIST_TYPE_UC,
+	err = mlx5_query_nic_vport_mac_list(esw->dev, vport_num, list_type,
 					    mac_list, &size);
 	if (err)
 		return;
-	esw_debug(esw->dev, "vport[%d] context update UC list size (%d)\n",
-		  vport_num, size);
+	esw_debug(esw->dev, "vport[%d] context update %s list size (%d)\n",
+		  vport_num, is_uc ? "UC" : "MC", size);
 
 	for (i = 0; i < size; i++) {
-		if (!is_valid_ether_addr(mac_list[i]))
+		if (is_uc && !is_valid_ether_addr(mac_list[i]))
+			continue;
+
+		if (!is_uc && !is_multicast_ether_addr(mac_list[i]))
 			continue;
 
-		addr = l2addr_hash_find(hash, mac_list[i],
-					struct mlx5_vport_addr);
+		addr = l2addr_hash_find(hash, mac_list[i], struct vport_addr);
 		if (addr) {
 			addr->action = MLX5_ACTION_NONE;
 			continue;
 		}
 
-		addr = l2addr_hash_add(hash, mac_list[i],
-				       struct mlx5_vport_addr,
+		addr = l2addr_hash_add(hash, mac_list[i], struct vport_addr,
 				       GFP_KERNEL);
 		if (!addr) {
 			esw_warn(esw->dev,
@@ -335,6 +746,7 @@ static void esw_update_vport_uc_list(struct mlx5_eswitch *esw,
 				 mac_list[i], vport_num);
 			continue;
 		}
+		addr->vport = vport_num;
 		addr->action = MLX5_ACTION_ADD;
 	}
 	kfree(mac_list);
@@ -345,32 +757,80 @@ static void esw_vport_change_handler(struct work_struct *work)
 	struct mlx5_vport *vport =
 		container_of(work, struct mlx5_vport, vport_change_handler);
 	struct mlx5_core_dev *dev = vport->dev;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 	u8 mac[ETH_ALEN];
 
 	mlx5_query_nic_vport_mac_address(dev, vport->vport, mac);
+	esw_debug(dev, "vport[%d] Context Changed: perm mac: %pM\n",
+		  vport->vport, mac);
+
+	if (vport->enabled_events & UC_ADDR_CHANGE) {
+		esw_update_vport_addr_list(esw, vport->vport,
+					   MLX5_NVPRT_LIST_TYPE_UC);
+		esw_apply_vport_addr_list(esw, vport->vport,
+					  MLX5_NVPRT_LIST_TYPE_UC);
+	}
 
-	if (!is_valid_ether_addr(mac))
-		goto out;
-
-	esw_update_vport_uc_list(dev->priv.eswitch, vport->vport);
-	esw_apply_vport_uc_list(dev->priv.eswitch, vport->vport);
+	if (vport->enabled_events & MC_ADDR_CHANGE) {
+		esw_update_vport_addr_list(esw, vport->vport,
+					   MLX5_NVPRT_LIST_TYPE_MC);
+		esw_apply_vport_addr_list(esw, vport->vport,
+					  MLX5_NVPRT_LIST_TYPE_MC);
+	}
 
-out:
+	esw_debug(esw->dev, "vport[%d] Context Changed: Done\n", vport->vport);
 	if (vport->enabled)
 		arm_vport_context_events_cmd(dev, vport->vport,
-					     UC_ADDR_CHANGE);
+					     vport->enabled_events);
 }
 
-static void esw_enable_vport(struct mlx5_eswitch *esw, int vport_num)
+static void esw_enable_vport(struct mlx5_eswitch *esw, int vport_num,
+			     int enable_events)
 {
 	struct mlx5_vport *vport = &esw->vports[vport_num];
 	unsigned long flags;
 
+	WARN_ON(vport->enabled);
+
+	esw_debug(esw->dev, "Enabling VPORT(%d)\n", vport_num);
+	mlx5_modify_vport_admin_state(esw->dev,
+				      MLX5_QUERY_VPORT_STATE_IN_OP_MOD_ESW_VPORT,
+				      vport_num,
+				      MLX5_ESW_VPORT_ADMIN_STATE_AUTO);
+
+	/* Sync with current vport context */
+	vport->enabled_events = enable_events;
+	esw_vport_change_handler(&vport->vport_change_handler);
+
 	spin_lock_irqsave(&vport->lock, flags);
 	vport->enabled = true;
 	spin_unlock_irqrestore(&vport->lock, flags);
 
-	arm_vport_context_events_cmd(esw->dev, vport_num, UC_ADDR_CHANGE);
+	arm_vport_context_events_cmd(esw->dev, vport_num, enable_events);
+
+	esw->enabled_vports++;
+	esw_debug(esw->dev, "Enabled VPORT(%d)\n", vport_num);
+}
+
+static void esw_cleanup_vport(struct mlx5_eswitch *esw, u16 vport_num)
+{
+	struct mlx5_vport *vport = &esw->vports[vport_num];
+	struct l2addr_node *node;
+	struct vport_addr *addr;
+	struct hlist_node *tmp;
+	int hi;
+
+	for_each_l2hash_node(node, tmp, vport->uc_list, hi) {
+		addr = container_of(node, struct vport_addr, node);
+		addr->action = MLX5_ACTION_DEL;
+	}
+	esw_apply_vport_addr_list(esw, vport_num, MLX5_NVPRT_LIST_TYPE_UC);
+
+	for_each_l2hash_node(node, tmp, vport->mc_list, hi) {
+		addr = container_of(node, struct vport_addr, node);
+		addr->action = MLX5_ACTION_DEL;
+	}
+	esw_apply_vport_addr_list(esw, vport_num, MLX5_NVPRT_LIST_TYPE_MC);
 }
 
 static void esw_disable_vport(struct mlx5_eswitch *esw, int vport_num)
@@ -381,19 +841,82 @@ static void esw_disable_vport(struct mlx5_eswitch *esw, int vport_num)
 	if (!vport->enabled)
 		return;
 
+	esw_debug(esw->dev, "Disabling vport(%d)\n", vport_num);
 	/* Mark this vport as disabled to discard new events */
 	spin_lock_irqsave(&vport->lock, flags);
 	vport->enabled = false;
+	vport->enabled_events = 0;
 	spin_unlock_irqrestore(&vport->lock, flags);
 
+	mlx5_modify_vport_admin_state(esw->dev,
+				      MLX5_QUERY_VPORT_STATE_IN_OP_MOD_ESW_VPORT,
+				      vport_num,
+				      MLX5_ESW_VPORT_ADMIN_STATE_DOWN);
 	/* Wait for current already scheduled events to complete */
 	flush_workqueue(esw->work_queue);
-
 	/* Disable events from this vport */
 	arm_vport_context_events_cmd(esw->dev, vport->vport, 0);
+	/* We don't assume VFs will cleanup after themselves */
+	esw_cleanup_vport(esw, vport_num);
+	esw->enabled_vports--;
 }
 
 /* Public E-Switch API */
+int mlx5_eswitch_enable_sriov(struct mlx5_eswitch *esw, int nvfs)
+{
+	int err;
+	int i;
+
+	if (!esw || !MLX5_CAP_GEN(esw->dev, vport_group_manager) ||
+	    MLX5_CAP_GEN(esw->dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
+		return 0;
+
+	if (!MLX5_CAP_GEN(esw->dev, eswitch_flow_table) ||
+	    !MLX5_CAP_ESW_FLOWTABLE_FDB(esw->dev, ft_support)) {
+		esw_warn(esw->dev, "E-Switch FDB is not supported, aborting ...\n");
+		return -ENOTSUPP;
+	}
+
+	esw_info(esw->dev, "E-Switch enable SRIOV: nvfs(%d)\n", nvfs);
+
+	esw_disable_vport(esw, 0);
+
+	err = esw_create_fdb_table(esw, nvfs + 1);
+	if (err)
+		goto abort;
+
+	for (i = 0; i <= nvfs; i++)
+		esw_enable_vport(esw, i, SRIOV_VPORT_EVENTS);
+
+	esw_info(esw->dev, "SRIOV enabled: active vports(%d)\n",
+		 esw->enabled_vports);
+	return 0;
+
+abort:
+	esw_enable_vport(esw, 0, UC_ADDR_CHANGE);
+	return err;
+}
+
+void mlx5_eswitch_disable_sriov(struct mlx5_eswitch *esw)
+{
+	int i;
+
+	if (!esw || !MLX5_CAP_GEN(esw->dev, vport_group_manager) ||
+	    MLX5_CAP_GEN(esw->dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
+		return;
+
+	esw_info(esw->dev, "disable SRIOV: active vports(%d)\n",
+		 esw->enabled_vports);
+
+	for (i = 0; i < esw->total_vports; i++)
+		esw_disable_vport(esw, i);
+
+	esw_destroy_fdb_table(esw);
+
+	/* VPORT 0 (PF) must be enabled back with non-sriov configuration */
+	esw_enable_vport(esw, 0, UC_ADDR_CHANGE);
+}
+
 int mlx5_eswitch_init(struct mlx5_core_dev *dev)
 {
 	int l2_table_size = 1 << MLX5_CAP_GEN(dev, log_max_l2_table);
@@ -439,7 +962,6 @@ int mlx5_eswitch_init(struct mlx5_core_dev *dev)
 		goto abort;
 	}
 
-	esw->total_vports = total_vports;
 	for (vport_num = 0; vport_num < total_vports; vport_num++) {
 		struct mlx5_vport *vport = &esw->vports[vport_num];
 
@@ -450,9 +972,11 @@ int mlx5_eswitch_init(struct mlx5_core_dev *dev)
 		spin_lock_init(&vport->lock);
 	}
 
-	dev->priv.eswitch = esw;
+	esw->total_vports = total_vports;
+	esw->enabled_vports = 0;
 
-	esw_enable_vport(esw, 0);
+	dev->priv.eswitch = esw;
+	esw_enable_vport(esw, 0, UC_ADDR_CHANGE);
 	/* VF Vports will be enabled when SRIOV is enabled */
 	return 0;
 abort:

drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

@@ -86,10 +86,25 @@ struct l2addr_node {
 	kfree(ptr);                                         \
 })
 
+struct mlx5_flow_rule {
+	void             *ft;
+	u32              fi;
+	u8               match_criteria_enable;
+	u32              *match_criteria;
+	u32              *match_value;
+	u32              action;
+	u32              flow_tag;
+	bool             valid;
+	atomic_t         refcount;
+	struct mutex     mutex; /* protect flow rule updates */
+	struct list_head dest_list;
+};
+
 struct mlx5_vport {
 	struct mlx5_core_dev    *dev;
 	int                     vport;
 	struct hlist_head       uc_list[MLX5_L2_ADDR_HASH_SIZE];
+	struct hlist_head       mc_list[MLX5_L2_ADDR_HASH_SIZE];
 	struct work_struct      vport_change_handler;
 
 	/* This spinlock protects access to vport data, between
@@ -98,6 +113,7 @@ struct mlx5_vport {
 	 */
 	spinlock_t              lock; /* vport events sync */
 	bool                    enabled;
+	u16                     enabled_events;
 };
 
 struct mlx5_l2_table {
@@ -106,17 +122,26 @@ struct mlx5_l2_table {
 	unsigned long        *bitmap;
 };
 
+struct mlx5_eswitch_fdb {
+	void *fdb;
+};
+
 struct mlx5_eswitch {
 	struct mlx5_core_dev    *dev;
 	struct mlx5_l2_table    l2_table;
+	struct mlx5_eswitch_fdb fdb_table;
+	struct hlist_head       mc_table[MLX5_L2_ADDR_HASH_SIZE];
 	struct workqueue_struct *work_queue;
 	struct mlx5_vport       *vports;
 	int                     total_vports;
+	int                     enabled_vports;
 };
 
 /* E-Switch API */
 int mlx5_eswitch_init(struct mlx5_core_dev *dev);
 void mlx5_eswitch_cleanup(struct mlx5_eswitch *esw);
 void mlx5_eswitch_vport_event(struct mlx5_eswitch *esw, struct mlx5_eqe *eqe);
+int mlx5_eswitch_enable_sriov(struct mlx5_eswitch *esw, int nvfs);
+void mlx5_eswitch_disable_sriov(struct mlx5_eswitch *esw);
 
 #endif /* __MLX5_ESWITCH_H__ */

drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h

@@ -36,6 +36,7 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/if_link.h>
 
 #define DRIVER_NAME "mlx5_core"
 #define DRIVER_VERSION "3.0-1"

drivers/net/ethernet/mellanox/mlx5/core/sriov.c

@@ -33,6 +33,9 @@
 #include <linux/pci.h>
 #include <linux/mlx5/driver.h>
 #include "mlx5_core.h"
+#ifdef CONFIG_MLX5_CORE_EN
+#include "eswitch.h"
+#endif
 
 static void enable_vfs(struct mlx5_core_dev *dev, int num_vfs)
 {
@@ -144,13 +147,15 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
 	mlx5_core_cleanup_vfs(dev);
 
 	if (!num_vfs) {
+#ifdef CONFIG_MLX5_CORE_EN
+		mlx5_eswitch_disable_sriov(dev->priv.eswitch);
+#endif
 		kfree(sriov->vfs_ctx);
 		sriov->vfs_ctx = NULL;
 		if (!pci_vfs_assigned(pdev))
 			pci_disable_sriov(pdev);
 		else
 			pr_info("unloading PF driver while leaving orphan VFs\n");
-
 		return 0;
 	}
 
@@ -161,6 +166,9 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
 	}
 
 	mlx5_core_init_vfs(dev, num_vfs);
+#ifdef CONFIG_MLX5_CORE_EN
+	mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs);
+#endif
 
 	return num_vfs;
 }
@@ -199,6 +207,10 @@ int mlx5_sriov_init(struct mlx5_core_dev *dev)
 	sriov->enabled_vfs = cur_vfs;
 
 	mlx5_core_init_vfs(dev, cur_vfs);
+#ifdef CONFIG_MLX5_CORE_EN
+	if (cur_vfs)
+		mlx5_eswitch_enable_sriov(dev->priv.eswitch, cur_vfs);
+#endif
 
 	enable_vfs(dev, cur_vfs);
 

include/linux/mlx5/device.h

@@ -1074,6 +1074,12 @@ enum {
 	VPORT_STATE_UP			= 0x1,
 };
 
+enum {
+	MLX5_ESW_VPORT_ADMIN_STATE_DOWN  = 0x0,
+	MLX5_ESW_VPORT_ADMIN_STATE_UP    = 0x1,
+	MLX5_ESW_VPORT_ADMIN_STATE_AUTO  = 0x2,
+};
+
 enum {
 	MLX5_L3_PROT_TYPE_IPV4		= 0,
 	MLX5_L3_PROT_TYPE_IPV6		= 1,

include/linux/mlx5/flow_table.h

@@ -41,6 +41,15 @@ struct mlx5_flow_table_group {
 	u32	match_criteria[MLX5_ST_SZ_DW(fte_match_param)];
 };
 
+struct mlx5_flow_destination {
+	enum mlx5_flow_destination_type	type;
+	union {
+		u32			tir_num;
+		void			*ft;
+		u32			vport_num;
+	};
+};
+
 void *mlx5_create_flow_table(struct mlx5_core_dev *dev, u8 level, u8 table_type,
 			     u16 num_groups,
 			     struct mlx5_flow_table_group *group);

include/linux/mlx5/mlx5_ifc.h

@@ -827,9 +827,10 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 	u8         reserved_69[0x220];
 };
 
-enum {
-	MLX5_DEST_FORMAT_STRUCT_DESTINATION_TYPE_FLOW_TABLE_  = 0x1,
-	MLX5_DEST_FORMAT_STRUCT_DESTINATION_TYPE_TIR          = 0x2,
+enum mlx5_flow_destination_type {
+	MLX5_FLOW_DESTINATION_TYPE_VPORT        = 0x0,
+	MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE   = 0x1,
+	MLX5_FLOW_DESTINATION_TYPE_TIR          = 0x2,
 };
 
 struct mlx5_ifc_dest_format_struct_bits {