Commit 7bef7eea authored by Khalil Blaiech's avatar Khalil Blaiech Committed by Hans de Goede
Browse files

platform/mellanox: add firmware reset support 



Add a new sysfs to initiate firmware reset in isolation mode.

Reviewed-by: default avatarDavid Thompson <davthompson@nvidia.com>
Signed-off-by: default avatarKhalil Blaiech <kblaiech@nvidia.com>
Link: https://lore.kernel.org/r/10da04fa43e8acce5d4ec173e225c28b9e979e4b.1675790783.git.kblaiech@nvidia.com


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent fb131c47

drivers/platform/mellanox/mlxbf-bootctl.c

+19 −0
Original line number Diff line number Diff line
@@ -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

};

drivers/platform/mellanox/mlxbf-bootctl.h

+6 −0
Original line number Diff line number Diff line
@@ -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