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Merge pull request #608 from mshych/master

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Add support of linux kernel 4.19 for all Mellanox switches.
This commit is contained in:
Jeffrey Townsend
2019-08-29 14:13:10 -07:00
committed by GitHub
parent 5bff916b31 12cf48658a
commit 44d85db7f4
5 changed files with 7481 additions and 330 deletions
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944
packages/base/any/kernels/4.19-lts/configs/x86_64-all/x86_64-all.config
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packages/base/any/kernels/4.19-lts/patches/0001-mlx-amendments-fixes-new-kernel-alignmnet.patch Normal file
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packages/base/any/kernels/4.19-lts/patches/0002-watchdog-mlx-wdt-introduce-watchdog-driver-for-Mella.patch Normal file
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diff -Nur a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
--- a/drivers/watchdog/Kconfig 2019-08-20 14:26:04.438449328 +0300
+++ b/drivers/watchdog/Kconfig 2019-08-20 14:22:54.744883819 +0300
@@ -241,6 +241,22 @@
help
Support for the watchdog on RAVE SP device.
+config MLX_WDT
+ tristate "Mellanox Watchdog"
+ depends on MELLANOX_PLATFORM
+ select WATCHDOG_CORE
+ select REGMAP
+ help
+ This is the driver for the hardware watchdog on Mellanox systems.
+ If you are going to use it, say Y here, otherwise N.
+ This driver can be used together with the watchdog daemon.
+ It can also watch your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your system after a certain amount of
+ time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called mlx-wdt.
+
# ALPHA Architecture
# ARM Architecture
diff -Nur a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
--- a/drivers/watchdog/Makefile 2019-08-20 14:26:04.438449328 +0300
+++ b/drivers/watchdog/Makefile 2019-08-20 14:23:27.893157429 +0300
@@ -139,6 +139,7 @@
obj-$(CONFIG_INTEL_MEI_WDT) += mei_wdt.o
obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o
obj-$(CONFIG_NIC7018_WDT) += nic7018_wdt.o
+obj-$(CONFIG_MLX_WDT) += mlx_wdt.o
# M68K Architecture
obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
diff -Nur a/drivers/watchdog/mlx_wdt.c b/drivers/watchdog/mlx_wdt.c
--- a/drivers/watchdog/mlx_wdt.c 1970-01-01 02:00:00.000000000 +0200
+++ b/drivers/watchdog/mlx_wdt.c 2019-08-20 14:21:55.748396514 +0300
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Mellanox watchdog driver
+ *
+ * Copyright (C) 2019 Mellanox Technologies
+ * Copyright (C) 2019 Michael Shych <mshych@mellanox.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/platform_data/mlxreg.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+
+#define MLXREG_WDT_CLOCK_SCALE 1000
+#define MLXREG_WDT_MAX_TIMEOUT_TYPE1 32
+#define MLXREG_WDT_MAX_TIMEOUT_TYPE2 255
+#define MLXREG_WDT_MIN_TIMEOUT 1
+#define MLXREG_WDT_OPTIONS_BASE (WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE | \
+ WDIOF_SETTIMEOUT)
+
+/**
+ * struct mlxreg_wdt - wd private data:
+ *
+ * @wdd: watchdog device;
+ * @device: basic device;
+ * @pdata: data received from platform driver;
+ * @regmap: register map of parent device;
+ * @timeout: defined timeout in sec.;
+ * @action_idx: index for direct access to action register;
+ * @timeout_idx:index for direct access to TO register;
+ * @tleft_idx: index for direct access to time left register;
+ * @ping_idx: index for direct access to ping register;
+ * @reset_idx: index for direct access to reset cause register;
+ * @wd_type: watchdog HW type;
+ */
+struct mlxreg_wdt {
+ struct watchdog_device wdd;
+ struct mlxreg_core_platform_data *pdata;
+ void *regmap;
+ int action_idx;
+ int timeout_idx;
+ int tleft_idx;
+ int ping_idx;
+ int reset_idx;
+ enum mlxreg_wdt_type wdt_type;
+};
+
+static void mlxreg_wdt_check_card_reset(struct mlxreg_wdt *wdt)
+{
+ struct mlxreg_core_data *reg_data;
+ u32 regval;
+ int rc;
+
+ if (wdt->reset_idx == -EINVAL)
+ return;
+
+ if (!(wdt->wdd.info->options & WDIOF_CARDRESET))
+ return;
+
+ reg_data = &wdt->pdata->data[wdt->reset_idx];
+ rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
+ if (!rc) {
+ if (regval & ~reg_data->mask) {
+ wdt->wdd.bootstatus = WDIOF_CARDRESET;
+ dev_info(wdt->wdd.parent,
+ "watchdog previously reset the CPU\n");
+ }
+ }
+}
+
+static int mlxreg_wdt_start(struct watchdog_device *wdd)
+{
+ struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
+ struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->action_idx];
+
+ return regmap_update_bits(wdt->regmap, reg_data->reg, ~reg_data->mask,
+ BIT(reg_data->bit));
+}
+
+static int mlxreg_wdt_stop(struct watchdog_device *wdd)
+{
+ struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
+ struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->action_idx];
+
+ return regmap_update_bits(wdt->regmap, reg_data->reg, ~reg_data->mask,
+ ~BIT(reg_data->bit));
+}
+
+static int mlxreg_wdt_ping(struct watchdog_device *wdd)
+{
+ struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
+ struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->ping_idx];
+
+ return regmap_update_bits_base(wdt->regmap, reg_data->reg,
+ ~reg_data->mask, BIT(reg_data->bit),
+ NULL, false, true);
+}
+
+static int mlxreg_wdt_set_timeout(struct watchdog_device *wdd,
+ unsigned int timeout)
+{
+ struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
+ struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->timeout_idx];
+ u32 regval, set_time, hw_timeout;
+ int rc;
+
+ if (wdt->wdt_type == MLX_WDT_TYPE1) {
+ rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
+ if (rc)
+ return rc;
+
+ hw_timeout = order_base_2(timeout * MLXREG_WDT_CLOCK_SCALE);
+ regval = (regval & reg_data->mask) | hw_timeout;
+ /* Rowndown to actual closest number of sec. */
+ set_time = BIT(hw_timeout) / MLXREG_WDT_CLOCK_SCALE;
+ } else {
+ set_time = timeout;
+ regval = timeout;
+ }
+
+ wdd->timeout = set_time;
+ rc = regmap_write(wdt->regmap, reg_data->reg, regval);
+
+ if (!rc) {
+ /*
+ * Restart watchdog with new timeout period
+ * if watchdog is already started.
+ */
+ if (watchdog_active(wdd)) {
+ rc = mlxreg_wdt_stop(wdd);
+ if (!rc)
+ rc = mlxreg_wdt_start(wdd);
+ }
+ }
+
+ return rc;
+}
+
+static unsigned int mlxreg_wdt_get_timeleft(struct watchdog_device *wdd)
+{
+ struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
+ struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->tleft_idx];
+ u32 regval;
+ int rc;
+
+ rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
+ /* Return 0 timeleft in case of failure register read. */
+ return rc == 0 ? regval : 0;
+}
+
+static const struct watchdog_ops mlxreg_wdt_ops_type1 = {
+ .start = mlxreg_wdt_start,
+ .stop = mlxreg_wdt_stop,
+ .ping = mlxreg_wdt_ping,
+ .set_timeout = mlxreg_wdt_set_timeout,
+ .owner = THIS_MODULE,
+};
+
+static const struct watchdog_ops mlxreg_wdt_ops_type2 = {
+ .start = mlxreg_wdt_start,
+ .stop = mlxreg_wdt_stop,
+ .ping = mlxreg_wdt_ping,
+ .set_timeout = mlxreg_wdt_set_timeout,
+ .get_timeleft = mlxreg_wdt_get_timeleft,
+ .owner = THIS_MODULE,
+};
+
+static const struct watchdog_info mlxreg_wdt_main_info = {
+ .options = MLXREG_WDT_OPTIONS_BASE
+ | WDIOF_CARDRESET,
+ .identity = "mlx-wdt-main",
+};
+
+static const struct watchdog_info mlxreg_wdt_aux_info = {
+ .options = MLXREG_WDT_OPTIONS_BASE
+ | WDIOF_ALARMONLY,
+ .identity = "mlx-wdt-aux",
+};
+
+static void mlxreg_wdt_config(struct mlxreg_wdt *wdt,
+ struct mlxreg_core_platform_data *pdata)
+{
+ struct mlxreg_core_data *data = pdata->data;
+ int i;
+
+ wdt->reset_idx = -EINVAL;
+ for (i = 0; i < pdata->counter; i++, data++) {
+ if (strnstr(data->label, "action", sizeof(data->label)))
+ wdt->action_idx = i;
+ else if (strnstr(data->label, "timeout", sizeof(data->label)))
+ wdt->timeout_idx = i;
+ else if (strnstr(data->label, "timeleft", sizeof(data->label)))
+ wdt->tleft_idx = i;
+ else if (strnstr(data->label, "ping", sizeof(data->label)))
+ wdt->ping_idx = i;
+ else if (strnstr(data->label, "reset", sizeof(data->label)))
+ wdt->reset_idx = i;
+ }
+
+ wdt->pdata = pdata;
+ if (strnstr(pdata->identity, mlxreg_wdt_main_info.identity,
+ sizeof(mlxreg_wdt_main_info.identity)))
+ wdt->wdd.info = &mlxreg_wdt_main_info;
+ else
+ wdt->wdd.info = &mlxreg_wdt_aux_info;
+
+ wdt->wdt_type = pdata->version;
+ if (wdt->wdt_type == MLX_WDT_TYPE2) {
+ wdt->wdd.ops = &mlxreg_wdt_ops_type2;
+ wdt->wdd.max_timeout = MLXREG_WDT_MAX_TIMEOUT_TYPE2;
+ } else {
+ wdt->wdd.ops = &mlxreg_wdt_ops_type1;
+ wdt->wdd.max_timeout = MLXREG_WDT_MAX_TIMEOUT_TYPE1;
+ }
+ wdt->wdd.min_timeout = MLXREG_WDT_MIN_TIMEOUT;
+}
+
+static int mlxreg_wdt_init_timeout(struct mlxreg_wdt *wdt,
+ struct mlxreg_core_platform_data *pdata)
+{
+ u32 timeout;
+
+ timeout = pdata->data[wdt->timeout_idx].health_cntr;
+ return mlxreg_wdt_set_timeout(&wdt->wdd, timeout);
+}
+
+static int mlxreg_wdt_probe(struct platform_device *pdev)
+{
+ struct mlxreg_core_platform_data *pdata;
+ struct mlxreg_wdt *wdt;
+ int rc;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata) {
+ dev_err(&pdev->dev, "Failed to get platform data.\n");
+ return -EINVAL;
+ }
+ wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
+
+ wdt->wdd.parent = &pdev->dev;
+ wdt->regmap = pdata->regmap;
+ mlxreg_wdt_config(wdt, pdata);
+
+ if ((pdata->features & MLXREG_CORE_WD_FEATURE_NOWAYOUT))
+ watchdog_set_nowayout(&wdt->wdd, WATCHDOG_NOWAYOUT);
+ watchdog_stop_on_reboot(&wdt->wdd);
+ watchdog_set_drvdata(&wdt->wdd, wdt);
+ rc = mlxreg_wdt_init_timeout(wdt, pdata);
+ if (rc)
+ goto register_error;
+
+ if ((pdata->features & MLXREG_CORE_WD_FEATURE_START_AT_BOOT)) {
+ rc = mlxreg_wdt_start(&wdt->wdd);
+ if (rc)
+ goto register_error;
+ set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);
+ }
+ mlxreg_wdt_check_card_reset(wdt);
+ rc = devm_watchdog_register_device(&pdev->dev, &wdt->wdd);
+
+register_error:
+ if (rc)
+ dev_err(&pdev->dev,
+ "Cannot register watchdog device (err=%d)\n", rc);
+ return rc;
+}
+
+static struct platform_driver mlxreg_wdt_driver = {
+ .probe = mlxreg_wdt_probe,
+ .driver = {
+ .name = "mlx-wdt",
+ },
+};
+
+module_platform_driver(mlxreg_wdt_driver);
+
+MODULE_AUTHOR("Michael Shych <michaelsh@mellanox.com>");
+MODULE_DESCRIPTION("Mellanox watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mlx-wdt");

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packages/base/any/kernels/4.19-lts/patches/series
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0003-drivers-net-ethernet-broadcom-tg3.patch
driver-ixgbe-external-phy.patch
driver-hwmon-max6620.patch
0001-mlx-amendments-fixes-new-kernel-alignmnet.patch
0002-watchdog-mlx-wdt-introduce-watchdog-driver-for-Mella.patch
0003-mlxsw-new-features-amendments-new-kernel-alignment.patch