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mlxbf-bootctl: Support sysfs entries for MFG fields

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This patch extends the mlxbf-bootctl driver's sysfs entries
to support read and write access for the manufacturing (MFG)
fields in the board-level EEPROM.  The MFG fields are set
once during the board manufacturing phase, and then the MFG
fields are write-protected.

Signed-off-by: David Thompson <davthompson@nvidia.com>
Reviewed-by: Shravan Kumar Ramani <shravankr@nvidia.com>
Link: https://lore.kernel.org/r/20230821183939.3229-1-davthompson@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
David Thompson 2023-08-21 14:39:39 -04:00 committed by Hans de Goede
parent 92c2fb8fa5
commit 7e38a7422f
3 changed files with 512 additions and 0 deletions
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66
Documentation/ABI/testing/sysfs-platform-mellanox-bootctl
View File

@ -84,3 +84,69 @@ Description:
The file used to write BlueField boot log with the format
"[INFO|WARN|ERR|ASSERT ]<msg>". Log level 'INFO' is used by
default if not specified.
What: /sys/bus/platform/devices/MLNXBF04:00/oob_mac
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "oob_mac" sysfs attribute holds the MAC address for
the out-of-band 1Gbps Ethernet port. This MAC address is
provided on a board-level label.
What: /sys/bus/platform/devices/MLNXBF04:00/opn
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "opn" sysfs attribute holds the board's part number.
This value is provided on a board-level label.
What: /sys/bus/platform/devices/MLNXBF04:00/sku
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "sku" sysfs attribute holds the board's SKU number.
This value is provided on a board-level label.
What: /sys/bus/platform/devices/MLNXBF04:00/modl
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "modl" sysfs attribute holds the board's model number.
This value is provided on a board-level label.
What: /sys/bus/platform/devices/MLNXBF04:00/sn
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "sn" sysfs attribute holds the board's serial number.
This value is provided on a board-level label.
What: /sys/bus/platform/devices/MLNXBF04:00/uuid
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "uuid" sysfs attribute holds the board's UUID.
This value is provided by the manufacturing team.
What: /sys/bus/platform/devices/MLNXBF04:00/rev
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "rev" sysfs attribute holds the board's revision.
This value is provided on a board-level label.
What: /sys/bus/platform/devices/MLNXBF04:00/mfg_lock
Date: August 2023
KernelVersion: 6.5
Contact: "David Thompson <davthompson@nvidia.com>"
Description:
The "mfg_lock" sysfs attribute is write-only.
A successful write to this attribute will latch the
board-level attributes into EEPROM, making them read-only.

438
drivers/platform/mellanox/mlxbf-bootctl.c
View File

@ -11,6 +11,7 @@
#include <linux/acpi.h>
#include <linux/arm-smccc.h>
#include <linux/delay.h>
#include <linux/if_ether.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@ -81,6 +82,49 @@ static const char * const mlxbf_rsh_log_level[] = {
static DEFINE_MUTEX(icm_ops_lock);
static DEFINE_MUTEX(os_up_lock);
static DEFINE_MUTEX(mfg_ops_lock);
/*
* Objects are stored within the MFG partition per type.
* Type 0 is not supported.
*/
enum {
MLNX_MFG_TYPE_OOB_MAC = 1,
MLNX_MFG_TYPE_OPN_0,
MLNX_MFG_TYPE_OPN_1,
MLNX_MFG_TYPE_OPN_2,
MLNX_MFG_TYPE_SKU_0,
MLNX_MFG_TYPE_SKU_1,
MLNX_MFG_TYPE_SKU_2,
MLNX_MFG_TYPE_MODL_0,
MLNX_MFG_TYPE_MODL_1,
MLNX_MFG_TYPE_MODL_2,
MLNX_MFG_TYPE_SN_0,
MLNX_MFG_TYPE_SN_1,
MLNX_MFG_TYPE_SN_2,
MLNX_MFG_TYPE_UUID_0,
MLNX_MFG_TYPE_UUID_1,
MLNX_MFG_TYPE_UUID_2,
MLNX_MFG_TYPE_UUID_3,
MLNX_MFG_TYPE_UUID_4,
MLNX_MFG_TYPE_REV,
};
#define MLNX_MFG_OPN_VAL_LEN 24
#define MLNX_MFG_SKU_VAL_LEN 24
#define MLNX_MFG_MODL_VAL_LEN 24
#define MLNX_MFG_SN_VAL_LEN 24
#define MLNX_MFG_UUID_VAL_LEN 40
#define MLNX_MFG_REV_VAL_LEN 8
#define MLNX_MFG_VAL_QWORD_CNT(type) \
(MLNX_MFG_##type##_VAL_LEN / sizeof(u64))
/*
* The MAC address consists of 6 bytes (2 digits each) separated by ':'.
* The expected format is: "XX:XX:XX:XX:XX:XX"
*/
#define MLNX_MFG_OOB_MAC_FORMAT_LEN \
((ETH_ALEN * 2) + (ETH_ALEN - 1))
/* ARM SMC call which is atomic and no need for lock. */
static int mlxbf_bootctl_smc(unsigned int smc_op, int smc_arg)
@ -454,6 +498,384 @@ static ssize_t os_up_store(struct device *dev,
return count;
}
static ssize_t oob_mac_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct arm_smccc_res res;
u8 *mac_byte_ptr;
mutex_lock(&mfg_ops_lock);
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO, MLNX_MFG_TYPE_OOB_MAC, 0, 0, 0,
0, 0, 0, &res);
mutex_unlock(&mfg_ops_lock);
if (res.a0)
return -EPERM;
mac_byte_ptr = (u8 *)&res.a1;
return sysfs_format_mac(buf, mac_byte_ptr, ETH_ALEN);
}
static ssize_t oob_mac_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned int byte[MLNX_MFG_OOB_MAC_FORMAT_LEN] = { 0 };
struct arm_smccc_res res;
int byte_idx, len;
u64 mac_addr = 0;
u8 *mac_byte_ptr;
if ((count - 1) != MLNX_MFG_OOB_MAC_FORMAT_LEN)
return -EINVAL;
len = sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
&byte[0], &byte[1], &byte[2],
&byte[3], &byte[4], &byte[5]);
if (len != ETH_ALEN)
return -EINVAL;
mac_byte_ptr = (u8 *)&mac_addr;
for (byte_idx = 0; byte_idx < ETH_ALEN; byte_idx++)
mac_byte_ptr[byte_idx] = (u8)byte[byte_idx];
mutex_lock(&mfg_ops_lock);
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO, MLNX_MFG_TYPE_OOB_MAC,
ETH_ALEN, mac_addr, 0, 0, 0, 0, &res);
mutex_unlock(&mfg_ops_lock);
return res.a0 ? -EPERM : count;
}
static ssize_t opn_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u64 opn_data[MLNX_MFG_VAL_QWORD_CNT(OPN) + 1] = { 0 };
struct arm_smccc_res res;
int word;
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(OPN); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO,
MLNX_MFG_TYPE_OPN_0 + word,
0, 0, 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
opn_data[word] = res.a1;
}
mutex_unlock(&mfg_ops_lock);
return snprintf(buf, PAGE_SIZE, "%s", (char *)opn_data);
}
static ssize_t opn_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u64 opn[MLNX_MFG_VAL_QWORD_CNT(OPN)] = { 0 };
struct arm_smccc_res res;
int word;
if (count > MLNX_MFG_OPN_VAL_LEN)
return -EINVAL;
memcpy(opn, buf, count);
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(OPN); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO,
MLNX_MFG_TYPE_OPN_0 + word,
sizeof(u64), opn[word], 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
}
mutex_unlock(&mfg_ops_lock);
return count;
}
static ssize_t sku_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u64 sku_data[MLNX_MFG_VAL_QWORD_CNT(SKU) + 1] = { 0 };
struct arm_smccc_res res;
int word;
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(SKU); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO,
MLNX_MFG_TYPE_SKU_0 + word,
0, 0, 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
sku_data[word] = res.a1;
}
mutex_unlock(&mfg_ops_lock);
return snprintf(buf, PAGE_SIZE, "%s", (char *)sku_data);
}
static ssize_t sku_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u64 sku[MLNX_MFG_VAL_QWORD_CNT(SKU)] = { 0 };
struct arm_smccc_res res;
int word;
if (count > MLNX_MFG_SKU_VAL_LEN)
return -EINVAL;
memcpy(sku, buf, count);
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(SKU); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO,
MLNX_MFG_TYPE_SKU_0 + word,
sizeof(u64), sku[word], 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
}
mutex_unlock(&mfg_ops_lock);
return count;
}
static ssize_t modl_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u64 modl_data[MLNX_MFG_VAL_QWORD_CNT(MODL) + 1] = { 0 };
struct arm_smccc_res res;
int word;
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(MODL); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO,
MLNX_MFG_TYPE_MODL_0 + word,
0, 0, 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
modl_data[word] = res.a1;
}
mutex_unlock(&mfg_ops_lock);
return snprintf(buf, PAGE_SIZE, "%s", (char *)modl_data);
}
static ssize_t modl_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u64 modl[MLNX_MFG_VAL_QWORD_CNT(MODL)] = { 0 };
struct arm_smccc_res res;
int word;
if (count > MLNX_MFG_MODL_VAL_LEN)
return -EINVAL;
memcpy(modl, buf, count);
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(MODL); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO,
MLNX_MFG_TYPE_MODL_0 + word,
sizeof(u64), modl[word], 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
}
mutex_unlock(&mfg_ops_lock);
return count;
}
static ssize_t sn_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u64 sn_data[MLNX_MFG_VAL_QWORD_CNT(SN) + 1] = { 0 };
struct arm_smccc_res res;
int word;
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(SN); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO,
MLNX_MFG_TYPE_SN_0 + word,
0, 0, 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
sn_data[word] = res.a1;
}
mutex_unlock(&mfg_ops_lock);
return snprintf(buf, PAGE_SIZE, "%s", (char *)sn_data);
}
static ssize_t sn_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u64 sn[MLNX_MFG_VAL_QWORD_CNT(SN)] = { 0 };
struct arm_smccc_res res;
int word;
if (count > MLNX_MFG_SN_VAL_LEN)
return -EINVAL;
memcpy(sn, buf, count);
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(SN); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO,
MLNX_MFG_TYPE_SN_0 + word,
sizeof(u64), sn[word], 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
}
mutex_unlock(&mfg_ops_lock);
return count;
}
static ssize_t uuid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u64 uuid_data[MLNX_MFG_VAL_QWORD_CNT(UUID) + 1] = { 0 };
struct arm_smccc_res res;
int word;
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(UUID); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO,
MLNX_MFG_TYPE_UUID_0 + word,
0, 0, 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
uuid_data[word] = res.a1;
}
mutex_unlock(&mfg_ops_lock);
return snprintf(buf, PAGE_SIZE, "%s", (char *)uuid_data);
}
static ssize_t uuid_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u64 uuid[MLNX_MFG_VAL_QWORD_CNT(UUID)] = { 0 };
struct arm_smccc_res res;
int word;
if (count > MLNX_MFG_UUID_VAL_LEN)
return -EINVAL;
memcpy(uuid, buf, count);
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(UUID); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO,
MLNX_MFG_TYPE_UUID_0 + word,
sizeof(u64), uuid[word], 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
}
mutex_unlock(&mfg_ops_lock);
return count;
}
static ssize_t rev_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u64 rev_data[MLNX_MFG_VAL_QWORD_CNT(REV) + 1] = { 0 };
struct arm_smccc_res res;
int word;
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(REV); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_GET_MFG_INFO,
MLNX_MFG_TYPE_REV + word,
0, 0, 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
rev_data[word] = res.a1;
}
mutex_unlock(&mfg_ops_lock);
return snprintf(buf, PAGE_SIZE, "%s", (char *)rev_data);
}
static ssize_t rev_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u64 rev[MLNX_MFG_VAL_QWORD_CNT(REV)] = { 0 };
struct arm_smccc_res res;
int word;
if (count > MLNX_MFG_REV_VAL_LEN)
return -EINVAL;
memcpy(rev, buf, count);
mutex_lock(&mfg_ops_lock);
for (word = 0; word < MLNX_MFG_VAL_QWORD_CNT(REV); word++) {
arm_smccc_smc(MLXBF_BOOTCTL_SET_MFG_INFO,
MLNX_MFG_TYPE_REV + word,
sizeof(u64), rev[word], 0, 0, 0, 0, &res);
if (res.a0) {
mutex_unlock(&mfg_ops_lock);
return -EPERM;
}
}
mutex_unlock(&mfg_ops_lock);
return count;
}
static ssize_t mfg_lock_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(&mfg_ops_lock);
arm_smccc_smc(MLXBF_BOOTCTL_LOCK_MFG_INFO, 0, 0, 0, 0, 0, 0, 0, &res);
mutex_unlock(&mfg_ops_lock);
return count;
}
static DEVICE_ATTR_RW(post_reset_wdog);
static DEVICE_ATTR_RW(reset_action);
static DEVICE_ATTR_RW(second_reset_action);
@ -463,6 +885,14 @@ 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 DEVICE_ATTR_RW(oob_mac);
static DEVICE_ATTR_RW(opn);
static DEVICE_ATTR_RW(sku);
static DEVICE_ATTR_RW(modl);
static DEVICE_ATTR_RW(sn);
static DEVICE_ATTR_RW(uuid);
static DEVICE_ATTR_RW(rev);
static DEVICE_ATTR_WO(mfg_lock);
static struct attribute *mlxbf_bootctl_attrs[] = {
&dev_attr_post_reset_wdog.attr,
@ -474,6 +904,14 @@ static struct attribute *mlxbf_bootctl_attrs[] = {
&dev_attr_rsh_log.attr,
&dev_attr_large_icm.attr,
&dev_attr_os_up.attr,
&dev_attr_oob_mac.attr,
&dev_attr_opn.attr,
&dev_attr_sku.attr,
&dev_attr_modl.attr,
&dev_attr_sn.attr,
&dev_attr_uuid.attr,
&dev_attr_rev.attr,
&dev_attr_mfg_lock.attr,
NULL
};

8
drivers/platform/mellanox/mlxbf-bootctl.h
View File

@ -81,6 +81,14 @@
*/
#define MLXBF_BOOTCTL_FW_RESET 0x8200000D
/*
* SMC function IDs to set, get and lock the manufacturing information
* stored within the eeprom.
*/
#define MLXBF_BOOTCTL_SET_MFG_INFO 0x8200000E
#define MLXBF_BOOTCTL_GET_MFG_INFO 0x8200000F
#define MLXBF_BOOTCTL_LOCK_MFG_INFO 0x82000011
/*
* SMC function IDs to set and get the large ICM carveout size
* stored in the eeprom.