Add a new sysfs to initiate firmware reset in isolation mode.
Reviewed-by: David Thompson <davthompson@xxxxxxxxxx>
Signed-off-by: Khalil Blaiech <kblaiech@xxxxxxxxxx>
---
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 1c7a288b59a5..5e41c270195c 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 148fdb43b435..b48243f60a59 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
--
2.30.1
