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platform/mellanox: Add TmFifo driver for Mellanox BlueField Soc 

This commit adds the TmFifo platform driver for Mellanox BlueField
Soc. TmFifo is a shared FIFO which enables external host machine
to exchange data with the SoC via USB or PCIe. The driver is based
on virtio framework and has console and network access enabled.

Reviewed-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Liming Sun <lsun@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
hifive-unleashed-5.2
Liming Sun 2019-05-03 09:49:08 -04:00 committed by Andy Shevchenko
parent d33a7e578e
commit 1357dfd726
4 changed files with 1356 additions and 1 deletions
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12
drivers/platform/mellanox/Kconfig
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@ -5,7 +5,7 @@
menuconfig MELLANOX_PLATFORM
bool "Platform support for Mellanox hardware"
depends on X86 || ARM || COMPILE_TEST
depends on X86 || ARM || ARM64 || COMPILE_TEST
---help---
Say Y here to get to see options for platform support for
Mellanox systems. This option alone does not add any kernel code.
@ -34,4 +34,14 @@ config MLXREG_IO
to system resets operation, system reset causes monitoring and some
kinds of mux selection.
config MLXBF_TMFIFO
tristate "Mellanox BlueField SoC TmFifo platform driver"
depends on ARM64
depends on ACPI
depends on VIRTIO_CONSOLE && VIRTIO_NET
help
Say y here to enable TmFifo support. The TmFifo driver provides
platform driver support for the TmFifo which supports console
and networking based on the virtio framework.
endif # MELLANOX_PLATFORM

1
drivers/platform/mellanox/Makefile
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@ -3,5 +3,6 @@
# Makefile for linux/drivers/platform/mellanox
# Mellanox Platform-Specific Drivers
#
obj-$(CONFIG_MLXBF_TMFIFO) += mlxbf-tmfifo.o
obj-$(CONFIG_MLXREG_HOTPLUG) += mlxreg-hotplug.o
obj-$(CONFIG_MLXREG_IO) += mlxreg-io.o

63
drivers/platform/mellanox/mlxbf-tmfifo-regs.h 100644
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@ -0,0 +1,63 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2019, Mellanox Technologies. All rights reserved.
*/
#ifndef __MLXBF_TMFIFO_REGS_H__
#define __MLXBF_TMFIFO_REGS_H__
#include <linux/types.h>
#include <linux/bits.h>
#define MLXBF_TMFIFO_TX_DATA 0x00
#define MLXBF_TMFIFO_TX_STS 0x08
#define MLXBF_TMFIFO_TX_STS__LENGTH 0x0001
#define MLXBF_TMFIFO_TX_STS__COUNT_SHIFT 0
#define MLXBF_TMFIFO_TX_STS__COUNT_WIDTH 9
#define MLXBF_TMFIFO_TX_STS__COUNT_RESET_VAL 0
#define MLXBF_TMFIFO_TX_STS__COUNT_RMASK GENMASK_ULL(8, 0)
#define MLXBF_TMFIFO_TX_STS__COUNT_MASK GENMASK_ULL(8, 0)
#define MLXBF_TMFIFO_TX_CTL 0x10
#define MLXBF_TMFIFO_TX_CTL__LENGTH 0x0001
#define MLXBF_TMFIFO_TX_CTL__LWM_SHIFT 0
#define MLXBF_TMFIFO_TX_CTL__LWM_WIDTH 8
#define MLXBF_TMFIFO_TX_CTL__LWM_RESET_VAL 128
#define MLXBF_TMFIFO_TX_CTL__LWM_RMASK GENMASK_ULL(7, 0)
#define MLXBF_TMFIFO_TX_CTL__LWM_MASK GENMASK_ULL(7, 0)
#define MLXBF_TMFIFO_TX_CTL__HWM_SHIFT 8
#define MLXBF_TMFIFO_TX_CTL__HWM_WIDTH 8
#define MLXBF_TMFIFO_TX_CTL__HWM_RESET_VAL 128
#define MLXBF_TMFIFO_TX_CTL__HWM_RMASK GENMASK_ULL(7, 0)
#define MLXBF_TMFIFO_TX_CTL__HWM_MASK GENMASK_ULL(15, 8)
#define MLXBF_TMFIFO_TX_CTL__MAX_ENTRIES_SHIFT 32
#define MLXBF_TMFIFO_TX_CTL__MAX_ENTRIES_WIDTH 9
#define MLXBF_TMFIFO_TX_CTL__MAX_ENTRIES_RESET_VAL 256
#define MLXBF_TMFIFO_TX_CTL__MAX_ENTRIES_RMASK GENMASK_ULL(8, 0)
#define MLXBF_TMFIFO_TX_CTL__MAX_ENTRIES_MASK GENMASK_ULL(40, 32)
#define MLXBF_TMFIFO_RX_DATA 0x00
#define MLXBF_TMFIFO_RX_STS 0x08
#define MLXBF_TMFIFO_RX_STS__LENGTH 0x0001
#define MLXBF_TMFIFO_RX_STS__COUNT_SHIFT 0
#define MLXBF_TMFIFO_RX_STS__COUNT_WIDTH 9
#define MLXBF_TMFIFO_RX_STS__COUNT_RESET_VAL 0
#define MLXBF_TMFIFO_RX_STS__COUNT_RMASK GENMASK_ULL(8, 0)
#define MLXBF_TMFIFO_RX_STS__COUNT_MASK GENMASK_ULL(8, 0)
#define MLXBF_TMFIFO_RX_CTL 0x10
#define MLXBF_TMFIFO_RX_CTL__LENGTH 0x0001
#define MLXBF_TMFIFO_RX_CTL__LWM_SHIFT 0
#define MLXBF_TMFIFO_RX_CTL__LWM_WIDTH 8
#define MLXBF_TMFIFO_RX_CTL__LWM_RESET_VAL 128
#define MLXBF_TMFIFO_RX_CTL__LWM_RMASK GENMASK_ULL(7, 0)
#define MLXBF_TMFIFO_RX_CTL__LWM_MASK GENMASK_ULL(7, 0)
#define MLXBF_TMFIFO_RX_CTL__HWM_SHIFT 8
#define MLXBF_TMFIFO_RX_CTL__HWM_WIDTH 8
#define MLXBF_TMFIFO_RX_CTL__HWM_RESET_VAL 128
#define MLXBF_TMFIFO_RX_CTL__HWM_RMASK GENMASK_ULL(7, 0)
#define MLXBF_TMFIFO_RX_CTL__HWM_MASK GENMASK_ULL(15, 8)
#define MLXBF_TMFIFO_RX_CTL__MAX_ENTRIES_SHIFT 32
#define MLXBF_TMFIFO_RX_CTL__MAX_ENTRIES_WIDTH 9
#define MLXBF_TMFIFO_RX_CTL__MAX_ENTRIES_RESET_VAL 256
#define MLXBF_TMFIFO_RX_CTL__MAX_ENTRIES_RMASK GENMASK_ULL(8, 0)
#define MLXBF_TMFIFO_RX_CTL__MAX_ENTRIES_MASK GENMASK_ULL(40, 32)
#endif /* !defined(__MLXBF_TMFIFO_REGS_H__) */

1281
drivers/platform/mellanox/mlxbf-tmfifo.c 100644
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