The BlueField has internal registers to store the ARM boot states.
Support setting the BlueField ARM boot state to "OS up".
Signed-off-by: Asmaa Mnebhi <[email protected]>
Reviewed-by: Vadim Pasternak <[email protected]>
---
v1->v2:
- No changes made to this patch. It has already been approved.
This is just to update [PATCH v2 1/2]
drivers/platform/mellanox/mlxbf-bootctl.c | 25 +++++++++++++++++++++++
drivers/platform/mellanox/mlxbf-bootctl.h | 5 +++++
2 files changed, 30 insertions(+)
diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c b/drivers/platform/mellanox/mlxbf-bootctl.c
index 52d1272478a4..0bf29eee1e70 100644
--- a/drivers/platform/mellanox/mlxbf-bootctl.c
+++ b/drivers/platform/mellanox/mlxbf-bootctl.c
@@ -80,6 +80,7 @@ static const char * const mlxbf_rsh_log_level[] = {
"INFO", "WARN", "ERR", "ASSERT"};
static DEFINE_MUTEX(icm_ops_lock);
+static DEFINE_MUTEX(os_up_lock);
/* ARM SMC call which is atomic and no need for lock. */
static int mlxbf_bootctl_smc(unsigned int smc_op, int smc_arg)
@@ -431,6 +432,28 @@ static ssize_t large_icm_store(struct device *dev,
return res.a0 ? -EPERM : count;
}
+static ssize_t os_up_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct arm_smccc_res res;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (val != 1)
+ return -EINVAL;
+
+ mutex_lock(&os_up_lock);
+ arm_smccc_smc(MLNX_HANDLE_OS_UP, 0, 0, 0, 0, 0, 0, 0, &res);
+ mutex_unlock(&os_up_lock);
+
+ return count;
+}
+
static DEVICE_ATTR_RW(post_reset_wdog);
static DEVICE_ATTR_RW(reset_action);
static DEVICE_ATTR_RW(second_reset_action);
@@ -439,6 +462,7 @@ static DEVICE_ATTR_RO(secure_boot_fuse_state);
static DEVICE_ATTR_WO(fw_reset);
static DEVICE_ATTR_WO(rsh_log);
static DEVICE_ATTR_RW(large_icm);
+static DEVICE_ATTR_WO(os_up);
static struct attribute *mlxbf_bootctl_attrs[] = {
&dev_attr_post_reset_wdog.attr,
@@ -449,6 +473,7 @@ static struct attribute *mlxbf_bootctl_attrs[] = {
&dev_attr_fw_reset.attr,
&dev_attr_rsh_log.attr,
&dev_attr_large_icm.attr,
+ &dev_attr_os_up.attr,
NULL
};
diff --git a/drivers/platform/mellanox/mlxbf-bootctl.h b/drivers/platform/mellanox/mlxbf-bootctl.h
index fc5019c90fc5..613963d448f2 100644
--- a/drivers/platform/mellanox/mlxbf-bootctl.h
+++ b/drivers/platform/mellanox/mlxbf-bootctl.h
@@ -90,6 +90,11 @@
#define MAX_ICM_BUFFER_SIZE 10
+/*
+ * 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 MLXBF_BOOTCTL_SIP_SVC_CALL_COUNT 0x8200ff00
#define MLXBF_BOOTCTL_SIP_SVC_UID 0x8200ff01
--
2.30.1