From 7bef7eea539dac6182e25e2e8d4a33063d458878 Mon Sep 17 00:00:00 2001 From: Khalil Blaiech Date: Wed, 5 Apr 2023 09:16:29 -0400 Subject: [PATCH] platform/mellanox: add firmware reset support Add a new sysfs to initiate firmware reset in isolation mode. Reviewed-by: David Thompson Signed-off-by: Khalil Blaiech Link: https://lore.kernel.org/r/10da04fa43e8acce5d4ec173e225c28b9e979e4b.1675790783.git.kblaiech@nvidia.com Signed-off-by: Hans de Goede --- drivers/platform/mellanox/mlxbf-bootctl.c | 19 +++++++++++++++++++ drivers/platform/mellanox/mlxbf-bootctl.h | 6 ++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c b/drivers/platform/mellanox/mlxbf-bootctl.c index 1c7a288..5e41c27 100644 --- a/drivers/platform/mellanox/mlxbf-bootctl.c +++ b/drivers/platform/mellanox/mlxbf-bootctl.c @@ -244,11 +244,29 @@ static ssize_t secure_boot_fuse_state_show(struct device *dev, return buf_len; } +static ssize_t fw_reset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned long key; + int err; + + err = kstrtoul(buf, 16, &key); + if (err) + return err; + + if (mlxbf_bootctl_smc(MLXBF_BOOTCTL_FW_RESET, key) < 0) + return -EINVAL; + + return count; +} + static DEVICE_ATTR_RW(post_reset_wdog); static DEVICE_ATTR_RW(reset_action); static DEVICE_ATTR_RW(second_reset_action); static DEVICE_ATTR_RO(lifecycle_state); static DEVICE_ATTR_RO(secure_boot_fuse_state); +static DEVICE_ATTR_WO(fw_reset); static struct attribute *mlxbf_bootctl_attrs[] = { &dev_attr_post_reset_wdog.attr, @@ -256,6 +274,7 @@ static struct attribute *mlxbf_bootctl_attrs[] = { &dev_attr_second_reset_action.attr, &dev_attr_lifecycle_state.attr, &dev_attr_secure_boot_fuse_state.attr, + &dev_attr_fw_reset.attr, NULL }; diff --git a/drivers/platform/mellanox/mlxbf-bootctl.h b/drivers/platform/mellanox/mlxbf-bootctl.h index 148fdb4..b48243f 100644 --- a/drivers/platform/mellanox/mlxbf-bootctl.h +++ b/drivers/platform/mellanox/mlxbf-bootctl.h @@ -75,6 +75,12 @@ #define MLXBF_BOOTCTL_GET_DIMM_INFO 0x82000008 +/* + * Initiate Firmware Reset via TYU. This might be invoked during the reset + * flow in isolation mode. + */ +#define MLXBF_BOOTCTL_FW_RESET 0x8200000D + /* SMC function IDs for SiP Service queries */ #define MLXBF_BOOTCTL_SIP_SVC_CALL_COUNT 0x8200ff00 #define MLXBF_BOOTCTL_SIP_SVC_UID 0x8200ff01 -- 2.7.4