mlxsw: Remove Mellanox SwitchX-2 ASIC support

Initial support for the Mellanox SwitchX-2 ASIC was added in July 2015.
Since then all development efforts shifted towards the Mellanox Spectrum
ASICs and development of this driver stopped beside trivial fixes and
refactoring. Therefore, the driver does not support any switch offloads
and simply traps all traffic to the CPU, rendering it irrelevant for
deployment.

In addition, support for this ASIC was dropped by Mellanox a few years
ago.

Given the driver is not used by any users and that there is no
intention of investing in its development, remove it from the kernel.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/Kconfig

@@ -49,17 +49,6 @@ config MLXSW_I2C
 	  To compile this driver as a module, choose M here: the
 	  module will be called mlxsw_i2c.
 
-config MLXSW_SWITCHX2
-	tristate "Mellanox Technologies SwitchX-2 support"
-	depends on MLXSW_CORE && MLXSW_PCI && NET_SWITCHDEV
-	default m
-	help
-	  This driver supports Mellanox Technologies SwitchX-2 Ethernet
-	  Switch ASICs.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called mlxsw_switchx2.
-
 config MLXSW_SPECTRUM
 	tristate "Mellanox Technologies Spectrum family support"
 	depends on MLXSW_CORE && MLXSW_PCI && NET_SWITCHDEV && VLAN_8021Q

drivers/net/ethernet/mellanox/mlxsw/Makefile

@@ -8,8 +8,6 @@ obj-$(CONFIG_MLXSW_PCI)		+= mlxsw_pci.o
 mlxsw_pci-objs			:= pci.o
 obj-$(CONFIG_MLXSW_I2C)		+= mlxsw_i2c.o
 mlxsw_i2c-objs			:= i2c.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 spectrum_router.o \

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

-/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
-/* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
-
-#ifndef _MLXSW_IB_H
-#define _MLXSW_IB_H
-
-#define MLXSW_IB_DEFAULT_MTU 4096
-
-#endif /* _MLXSW_IB_H */

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

@@ -1426,11 +1426,6 @@ static int mlxsw_pci_sys_ready_wait(struct mlxsw_pci *mlxsw_pci,
 	unsigned long end;
 	u32 val;
 
-	if (id->device == PCI_DEVICE_ID_MELLANOX_SWITCHX2) {
-		msleep(MLXSW_PCI_SW_RESET_TIMEOUT_MSECS);
-		return 0;
-	}
-
 	/* We must wait for the HW to become responsive. */
 	msleep(MLXSW_PCI_SW_RESET_WAIT_MSECS);
 

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

@@ -6,7 +6,6 @@
 
 #include <linux/pci.h>
 
-#define PCI_DEVICE_ID_MELLANOX_SWITCHX2		0xc738
 #define PCI_DEVICE_ID_MELLANOX_SPECTRUM		0xcb84
 #define PCI_DEVICE_ID_MELLANOX_SPECTRUM2	0xcf6c
 #define PCI_DEVICE_ID_MELLANOX_SPECTRUM3	0xcf70