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mlxbf-bootctl: Support setting the ARM boot state to "OS up"

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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 <asmaa@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20230809162857.21243-3-asmaa@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Asmaa Mnebhi 2023-08-09 12:28:57 -04:00 committed by Hans de Goede
parent b18a97ed90
commit e3205d4173
2 changed files with 30 additions and 0 deletions
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25
drivers/platform/mellanox/mlxbf-bootctl.c
View file

@ -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
};

5
drivers/platform/mellanox/mlxbf-bootctl.h
View file

@ -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