[SRU][F:linux-bluefield][PATCH v1 0/1] UBUNTU: SAUCE: mlxbf-bootctl: support SMC call for setting ARM boot state

[Asmaa Mnebhi]

BugLink: https://bugs.launchpad.net/bugs/2013383

Add a new SMC call which allows setting the ARM boot progress state to "OS is up".

Signed-off-by: Asmaa Mnebhi <asmaa at nvidia.com>
---
 drivers/platform/mellanox/mlx-bootctl.c | 23 +++++++++++++++++++++++
 drivers/platform/mellanox/mlx-bootctl.h |  5 +++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/platform/mellanox/mlx-bootctl.c b/drivers/platform/mellanox/mlx-bootctl.c
index 88f3269da960..afec67851a1e 100644
--- a/drivers/platform/mellanox/mlx-bootctl.c
+++ b/drivers/platform/mellanox/mlx-bootctl.c
@@ -104,6 +104,7 @@ enum {
 
 /* This mutex is used to serialize MFG write and lock operations. */
 static DEFINE_MUTEX(mfg_ops_lock);
+static DEFINE_MUTEX(os_up_lock);
 
 #define MLNX_MFG_OOB_MAC_LEN         ETH_ALEN
 #define MLNX_MFG_OPN_VAL_LEN         24
@@ -709,6 +710,26 @@ static ssize_t mfg_lock_store(struct device_driver *drv, const char *buf,
 	return count;
 }
 
+static ssize_t os_up_store(struct device_driver *drv, const char *buf,
+			      size_t count)
+{
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err)
+		return err;
+
+	if (val != 1)
+		return -EINVAL;
+
+	mutex_lock(&os_up_lock);
+	smc_call0(MLNX_HANDLE_OS_UP);
+	mutex_unlock(&os_up_lock);
+
+	return count;
+}
+
 /* Log header format. */
 #define RSH_LOG_TYPE_SHIFT	56
 #define RSH_LOG_LEN_SHIFT	48
@@ -1170,6 +1191,7 @@ static DRIVER_ATTR_RW(uuid);
 static DRIVER_ATTR_RW(rev);
 static DRIVER_ATTR_WO(mfg_lock);
 static DRIVER_ATTR_RW(rsh_log);
+static DRIVER_ATTR_WO(os_up);
 
 static struct attribute *mbc_dev_attrs[] = {
 	&driver_attr_post_reset_wdog.attr,
@@ -1187,6 +1209,7 @@ static struct attribute *mbc_dev_attrs[] = {
 	&driver_attr_rev.attr,
 	&driver_attr_mfg_lock.attr,
 	&driver_attr_rsh_log.attr,
+	&driver_attr_os_up.attr,
 	NULL
 };
 
diff --git a/drivers/platform/mellanox/mlx-bootctl.h b/drivers/platform/mellanox/mlx-bootctl.h
index a937ecf16551..bcb13ab8c2fd 100644
--- a/drivers/platform/mellanox/mlx-bootctl.h
+++ b/drivers/platform/mellanox/mlx-bootctl.h
@@ -111,6 +111,11 @@
 #define MLNX_HANDLE_GET_MFG_INFO    0x8200000F
 #define MLNX_HANDLE_LOCK_MFG_INFO   0x82000011
 
+/*
+ * SMC function ID to set the ARM boot state to up
+ */
+#define MLNX_HANDLE_OS_UP    0x82000014
+
 /* SMC function IDs for SiP Service queries */
 #define MLNX_SIP_SVC_CALL_COUNT		0x8200ff00
 #define MLNX_SIP_SVC_UID		0x8200ff01
-- 
2.30.1