mlxsw: spectrum: Add initial support for Spectrum ASIC

Add support for new generation Mellanox Spectrum ASIC, 10/25/40/50 and
100Gb/s Ethernet Switch.

The initial driver implements bridge forwarding offload including
bridge internal VLAN support, FDB static entries, FDB learning and
HW ageing including their setup.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Elad Raz <eladr@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/Kconfig

@@ -30,3 +30,14 @@ config MLXSW_SWITCHX2
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called mlxsw_switchx2.
+
+config MLXSW_SPECTRUM
+	tristate "Mellanox Technologies Spectrum support"
+	depends on MLXSW_CORE && NET_SWITCHDEV
+	default m
+	---help---
+	  This driver supports Mellanox Technologies Spectrum Ethernet
+	  Switch ASICs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mlxsw_spectrum.

drivers/net/ethernet/mellanox/mlxsw/Makefile

@@ -4,3 +4,6 @@ obj-$(CONFIG_MLXSW_PCI)		+= mlxsw_pci.o
 mlxsw_pci-objs			:= pci.o
 obj-$(CONFIG_MLXSW_SWITCHX2)	+= mlxsw_switchx2.o
 mlxsw_switchx2-objs		:= switchx2.o
+obj-$(CONFIG_MLXSW_SPECTRUM)	+= mlxsw_spectrum.o
+mlxsw_spectrum-objs		:= spectrum.o spectrum_buffers.o \
+				   spectrum_switchdev.o

drivers/net/ethernet/mellanox/mlxsw/core.h

@@ -54,6 +54,7 @@
 	MODULE_ALIAS(MLXSW_MODULE_ALIAS_PREFIX kind)
 
 #define MLXSW_DEVICE_KIND_SWITCHX2 "switchx2"
+#define MLXSW_DEVICE_KIND_SPECTRUM "spectrum"
 
 struct mlxsw_core;
 struct mlxsw_driver;

drivers/net/ethernet/mellanox/mlxsw/pci.c

@@ -57,6 +57,7 @@ static const char mlxsw_pci_driver_name[] = "mlxsw_pci";
 
 static const struct pci_device_id mlxsw_pci_id_table[] = {
 	{PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SWITCHX2), 0},
+	{PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SPECTRUM), 0},
 	{0, }
 };
 
@@ -67,6 +68,8 @@ static const char *mlxsw_pci_device_kind_get(const struct pci_device_id *id)
 	switch (id->device) {
 	case PCI_DEVICE_ID_MELLANOX_SWITCHX2:
 		return MLXSW_DEVICE_KIND_SWITCHX2;
+	case PCI_DEVICE_ID_MELLANOX_SPECTRUM:
+		return MLXSW_DEVICE_KIND_SPECTRUM;
 	default:
 		BUG();
 	}

drivers/net/ethernet/mellanox/mlxsw/pci.h

@@ -40,6 +40,7 @@
 #include "item.h"
 
 #define PCI_DEVICE_ID_MELLANOX_SWITCHX2	0xc738
+#define PCI_DEVICE_ID_MELLANOX_SPECTRUM	0xcb84
 #define MLXSW_PCI_BAR0_SIZE		(1024 * 1024) /* 1MB */
 #define MLXSW_PCI_PAGE_SIZE		4096
 

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

+/*
+ * drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+ * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
+ * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
+ * Copyright (c) 2015 Elad Raz <eladr@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.
+ */
+
+#ifndef _MLXSW_SPECTRUM_H
+#define _MLXSW_SPECTRUM_H
+
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/bitops.h>
+#include <linux/if_vlan.h>
+#include <net/switchdev.h>
+
+#include "core.h"
+
+#define MLXSW_SP_VFID_BASE VLAN_N_VID
+
+struct mlxsw_sp_port;
+
+struct mlxsw_sp {
+	unsigned long active_vfids[BITS_TO_LONGS(VLAN_N_VID)];
+	unsigned long active_fids[BITS_TO_LONGS(VLAN_N_VID)];
+	struct mlxsw_sp_port **ports;
+	struct mlxsw_core *core;
+	const struct mlxsw_bus_info *bus_info;
+	unsigned char base_mac[ETH_ALEN];
+	struct {
+		struct delayed_work dw;
+#define MLXSW_SP_DEFAULT_LEARNING_INTERVAL 100
+		unsigned int interval; /* ms */
+	} fdb_notify;
+#define MLXSW_SP_DEFAULT_AGEING_TIME 300
+	u32 ageing_time;
+	struct {
+		struct net_device *dev;
+		unsigned int ref_count;
+	} master_bridge;
+};
+
+struct mlxsw_sp_port_pcpu_stats {
+	u64			rx_packets;
+	u64			rx_bytes;
+	u64			tx_packets;
+	u64			tx_bytes;
+	struct u64_stats_sync	syncp;
+	u32			tx_dropped;
+};
+
+struct mlxsw_sp_port {
+	struct net_device *dev;
+	struct mlxsw_sp_port_pcpu_stats __percpu *pcpu_stats;
+	struct mlxsw_sp *mlxsw_sp;
+	u8 local_port;
+	u8 stp_state;
+	u8 learning:1;
+	u8 learning_sync:1;
+	u16 pvid;
+	bool bridged;
+	/* 802.1Q bridge VLANs */
+	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+	/* VLAN interfaces */
+	unsigned long active_vfids[BITS_TO_LONGS(VLAN_N_VID)];
+	u16 nr_vfids;
+};
+
+enum mlxsw_sp_flood_table {
+	MLXSW_SP_FLOOD_TABLE_UC,
+	MLXSW_SP_FLOOD_TABLE_BM,
+};
+
+int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp);
+int mlxsw_sp_port_buffers_init(struct mlxsw_sp_port *mlxsw_sp_port);
+
+int mlxsw_sp_switchdev_init(struct mlxsw_sp *mlxsw_sp);
+void mlxsw_sp_switchdev_fini(struct mlxsw_sp *mlxsw_sp);
+int mlxsw_sp_port_vlan_init(struct mlxsw_sp_port *mlxsw_sp_port);
+void mlxsw_sp_port_switchdev_init(struct mlxsw_sp_port *mlxsw_sp_port);
+void mlxsw_sp_port_switchdev_fini(struct mlxsw_sp_port *mlxsw_sp_port);
+int mlxsw_sp_port_vid_to_fid_set(struct mlxsw_sp_port *mlxsw_sp_port,
+				 enum mlxsw_reg_svfa_mt mt, bool valid, u16 fid,
+				 u16 vid);
+int mlxsw_sp_port_vlan_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid_begin,
+			   u16 vid_end, bool is_member, bool untagged);
+int mlxsw_sp_port_add_vid(struct net_device *dev, __be16 __always_unused proto,
+			  u16 vid);
+int mlxsw_sp_port_kill_vid(struct net_device *dev,
+			   __be16 __always_unused proto, u16 vid);
+
+#endif

drivers/net/ethernet/mellanox/mlxsw/txheader.h

@@ -38,6 +38,7 @@
 
 #define MLXSW_TXHDR_LEN 0x10
 #define MLXSW_TXHDR_VERSION_0 0
+#define MLXSW_TXHDR_VERSION_1 1
 
 enum {
 	MLXSW_TXHDR_ETH_CTL,