[SRU][F/J:linux-bluefield][PATCH v1 1/1] UBUNTU: SAUCE: mlxbf-bootctl: support SMC call for setting ARM boot state
Asmaa Mnebhi
asmaa at nvidia.com
Thu Mar 30 18:42:33 UTC 2023
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/mlxbf-bootctl.c | 23 +++++++++++++++++++++++
drivers/platform/mellanox/mlxbf-bootctl.h | 5 +++++
2 files changed, 28 insertions(+)
diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c b/drivers/platform/mellanox/mlxbf-bootctl.c
index e8877a19dda9..a68bf5b27013 100644
--- a/drivers/platform/mellanox/mlxbf-bootctl.c
+++ b/drivers/platform/mellanox/mlxbf-bootctl.c
@@ -105,6 +105,7 @@ enum {
/* This mutex is used to serialize MFG write and lock operations. */
static DEFINE_MUTEX(mfg_ops_lock);
static DEFINE_MUTEX(icm_ops_lock);
+static DEFINE_MUTEX(os_up_lock);
#define MLNX_MFG_OOB_MAC_LEN ETH_ALEN
#define MLNX_MFG_OPN_VAL_LEN 24
@@ -747,6 +748,26 @@ 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
@@ -1209,6 +1230,7 @@ static DRIVER_ATTR_RW(rev);
static DRIVER_ATTR_WO(mfg_lock);
static DRIVER_ATTR_RW(rsh_log);
static DRIVER_ATTR_RW(large_icm);
+static DRIVER_ATTR_WO(os_up);
static struct attribute *mbc_dev_attrs[] = {
&driver_attr_post_reset_wdog.attr,
@@ -1227,6 +1249,7 @@ static struct attribute *mbc_dev_attrs[] = {
&driver_attr_mfg_lock.attr,
&driver_attr_rsh_log.attr,
&driver_attr_large_icm.attr,
+ &driver_attr_os_up.attr,
NULL
};
diff --git a/drivers/platform/mellanox/mlxbf-bootctl.h b/drivers/platform/mellanox/mlxbf-bootctl.h
index c70204770af3..dc73f7e88914 100644
--- a/drivers/platform/mellanox/mlxbf-bootctl.h
+++ b/drivers/platform/mellanox/mlxbf-bootctl.h
@@ -102,6 +102,11 @@
#define MLNX_HANDLE_SET_ICM_INFO 0x82000012
#define MLNX_HANDLE_GET_ICM_INFO 0x82000013
+/*
+ * SMC function ID to set the ARM boot state to up
+ */
+#define MLNX_HANDLE_OS_UP 0x82000014
+
#define MAX_ICM_BUFFER_SIZE 10
/* SMC function IDs for SiP Service queries */
--
2.30.1
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