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platform/mellanox: add firmware reset support

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

Reviewed-by: David Thompson <davthompson@nvidia.com>
Signed-off-by: Khalil Blaiech <kblaiech@nvidia.com>
Link: https://lore.kernel.org/r/10da04fa43e8acce5d4ec173e225c28b9e979e4b.1675790783.git.kblaiech@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Khalil Blaiech 2023-04-05 09:16:29 -04:00 committed by Hans de Goede
parent fb131c472d
commit 7bef7eea53
2 changed files with 25 additions and 0 deletions
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19
drivers/platform/mellanox/mlxbf-bootctl.c
View File

@ -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
};

6
drivers/platform/mellanox/mlxbf-bootctl.h
View File

@ -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