linux/drivers/fpga/intel-m10-bmc-sec-update.c
Ilpo Järvinen 74c6317df0 mfd: intel-m10-bmc: Change staging size to a variable
The secure update driver does a sanity-check of the image size in
comparison to the size of the staging area in FLASH. Instead of
hard-wiring M10BMC_STAGING_SIZE, move the staging size to the
m10bmc_csr_map structure to make the size assignment more flexible.

Co-developed-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Peter Colberg <peter.colberg@intel.com>
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20240402184925.1065932-1-peter.colberg@intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
2024-05-10 15:39:16 +01:00

775 lines
20 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Intel MAX10 Board Management Controller Secure Update Driver
*
* Copyright (C) 2019-2022 Intel Corporation. All rights reserved.
*
*/
#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/mfd/intel-m10-bmc.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
struct m10bmc_sec;
struct m10bmc_sec_ops {
int (*rsu_status)(struct m10bmc_sec *sec);
};
struct m10bmc_sec {
struct device *dev;
struct intel_m10bmc *m10bmc;
struct fw_upload *fwl;
char *fw_name;
u32 fw_name_id;
bool cancel_request;
const struct m10bmc_sec_ops *ops;
};
static DEFINE_XARRAY_ALLOC(fw_upload_xa);
/* Root Entry Hash (REH) support */
#define REH_SHA256_SIZE 32
#define REH_SHA384_SIZE 48
#define REH_MAGIC GENMASK(15, 0)
#define REH_SHA_NUM_BYTES GENMASK(31, 16)
static int m10bmc_sec_write(struct m10bmc_sec *sec, const u8 *buf, u32 offset, u32 size)
{
struct intel_m10bmc *m10bmc = sec->m10bmc;
unsigned int stride = regmap_get_reg_stride(m10bmc->regmap);
u32 write_count = size / stride;
u32 leftover_offset = write_count * stride;
u32 leftover_size = size - leftover_offset;
u32 leftover_tmp = 0;
int ret;
if (sec->m10bmc->flash_bulk_ops)
return sec->m10bmc->flash_bulk_ops->write(m10bmc, buf, offset, size);
if (WARN_ON_ONCE(stride > sizeof(leftover_tmp)))
return -EINVAL;
ret = regmap_bulk_write(m10bmc->regmap, M10BMC_STAGING_BASE + offset,
buf + offset, write_count);
if (ret)
return ret;
/* If size is not aligned to stride, handle the remainder bytes with regmap_write() */
if (leftover_size) {
memcpy(&leftover_tmp, buf + leftover_offset, leftover_size);
ret = regmap_write(m10bmc->regmap, M10BMC_STAGING_BASE + offset + leftover_offset,
leftover_tmp);
if (ret)
return ret;
}
return 0;
}
static int m10bmc_sec_read(struct m10bmc_sec *sec, u8 *buf, u32 addr, u32 size)
{
struct intel_m10bmc *m10bmc = sec->m10bmc;
unsigned int stride = regmap_get_reg_stride(m10bmc->regmap);
u32 read_count = size / stride;
u32 leftover_offset = read_count * stride;
u32 leftover_size = size - leftover_offset;
u32 leftover_tmp;
int ret;
if (sec->m10bmc->flash_bulk_ops)
return sec->m10bmc->flash_bulk_ops->read(m10bmc, buf, addr, size);
if (WARN_ON_ONCE(stride > sizeof(leftover_tmp)))
return -EINVAL;
ret = regmap_bulk_read(m10bmc->regmap, addr, buf, read_count);
if (ret)
return ret;
/* If size is not aligned to stride, handle the remainder bytes with regmap_read() */
if (leftover_size) {
ret = regmap_read(m10bmc->regmap, addr + leftover_offset, &leftover_tmp);
if (ret)
return ret;
memcpy(buf + leftover_offset, &leftover_tmp, leftover_size);
}
return 0;
}
static ssize_t
show_root_entry_hash(struct device *dev, u32 exp_magic,
u32 prog_addr, u32 reh_addr, char *buf)
{
struct m10bmc_sec *sec = dev_get_drvdata(dev);
int sha_num_bytes, i, ret, cnt = 0;
u8 hash[REH_SHA384_SIZE];
u32 magic;
ret = m10bmc_sec_read(sec, (u8 *)&magic, prog_addr, sizeof(magic));
if (ret)
return ret;
if (FIELD_GET(REH_MAGIC, magic) != exp_magic)
return sysfs_emit(buf, "hash not programmed\n");
sha_num_bytes = FIELD_GET(REH_SHA_NUM_BYTES, magic) / 8;
if (sha_num_bytes != REH_SHA256_SIZE &&
sha_num_bytes != REH_SHA384_SIZE) {
dev_err(sec->dev, "%s bad sha num bytes %d\n", __func__,
sha_num_bytes);
return -EINVAL;
}
ret = m10bmc_sec_read(sec, hash, reh_addr, sha_num_bytes);
if (ret) {
dev_err(dev, "failed to read root entry hash\n");
return ret;
}
for (i = 0; i < sha_num_bytes; i++)
cnt += sprintf(buf + cnt, "%02x", hash[i]);
cnt += sprintf(buf + cnt, "\n");
return cnt;
}
#define DEVICE_ATTR_SEC_REH_RO(_name) \
static ssize_t _name##_root_entry_hash_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct m10bmc_sec *sec = dev_get_drvdata(dev); \
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map; \
\
return show_root_entry_hash(dev, csr_map->_name##_magic, \
csr_map->_name##_prog_addr, \
csr_map->_name##_reh_addr, \
buf); \
} \
static DEVICE_ATTR_RO(_name##_root_entry_hash)
DEVICE_ATTR_SEC_REH_RO(bmc);
DEVICE_ATTR_SEC_REH_RO(sr);
DEVICE_ATTR_SEC_REH_RO(pr);
#define CSK_BIT_LEN 128U
#define CSK_32ARRAY_SIZE DIV_ROUND_UP(CSK_BIT_LEN, 32)
static ssize_t
show_canceled_csk(struct device *dev, u32 addr, char *buf)
{
unsigned int i, size = CSK_32ARRAY_SIZE * sizeof(u32);
struct m10bmc_sec *sec = dev_get_drvdata(dev);
DECLARE_BITMAP(csk_map, CSK_BIT_LEN);
__le32 csk_le32[CSK_32ARRAY_SIZE];
u32 csk32[CSK_32ARRAY_SIZE];
int ret;
ret = m10bmc_sec_read(sec, (u8 *)&csk_le32, addr, size);
if (ret) {
dev_err(sec->dev, "failed to read CSK vector\n");
return ret;
}
for (i = 0; i < CSK_32ARRAY_SIZE; i++)
csk32[i] = le32_to_cpu(((csk_le32[i])));
bitmap_from_arr32(csk_map, csk32, CSK_BIT_LEN);
bitmap_complement(csk_map, csk_map, CSK_BIT_LEN);
return bitmap_print_to_pagebuf(1, buf, csk_map, CSK_BIT_LEN);
}
#define DEVICE_ATTR_SEC_CSK_RO(_name) \
static ssize_t _name##_canceled_csks_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct m10bmc_sec *sec = dev_get_drvdata(dev); \
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map; \
\
return show_canceled_csk(dev, \
csr_map->_name##_prog_addr + CSK_VEC_OFFSET, \
buf); \
} \
static DEVICE_ATTR_RO(_name##_canceled_csks)
#define CSK_VEC_OFFSET 0x34
DEVICE_ATTR_SEC_CSK_RO(bmc);
DEVICE_ATTR_SEC_CSK_RO(sr);
DEVICE_ATTR_SEC_CSK_RO(pr);
#define FLASH_COUNT_SIZE 4096 /* count stored as inverted bit vector */
static ssize_t flash_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct m10bmc_sec *sec = dev_get_drvdata(dev);
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
unsigned int num_bits;
u8 *flash_buf;
int cnt, ret;
num_bits = FLASH_COUNT_SIZE * 8;
flash_buf = kmalloc(FLASH_COUNT_SIZE, GFP_KERNEL);
if (!flash_buf)
return -ENOMEM;
ret = m10bmc_sec_read(sec, flash_buf, csr_map->rsu_update_counter,
FLASH_COUNT_SIZE);
if (ret) {
dev_err(sec->dev, "failed to read flash count\n");
goto exit_free;
}
cnt = num_bits - bitmap_weight((unsigned long *)flash_buf, num_bits);
exit_free:
kfree(flash_buf);
return ret ? : sysfs_emit(buf, "%u\n", cnt);
}
static DEVICE_ATTR_RO(flash_count);
static struct attribute *m10bmc_security_attrs[] = {
&dev_attr_flash_count.attr,
&dev_attr_bmc_root_entry_hash.attr,
&dev_attr_sr_root_entry_hash.attr,
&dev_attr_pr_root_entry_hash.attr,
&dev_attr_sr_canceled_csks.attr,
&dev_attr_pr_canceled_csks.attr,
&dev_attr_bmc_canceled_csks.attr,
NULL,
};
static struct attribute_group m10bmc_security_attr_group = {
.name = "security",
.attrs = m10bmc_security_attrs,
};
static const struct attribute_group *m10bmc_sec_attr_groups[] = {
&m10bmc_security_attr_group,
NULL,
};
static void log_error_regs(struct m10bmc_sec *sec, u32 doorbell)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 auth_result;
dev_err(sec->dev, "Doorbell: 0x%08x\n", doorbell);
if (!m10bmc_sys_read(sec->m10bmc, csr_map->auth_result, &auth_result))
dev_err(sec->dev, "RSU auth result: 0x%08x\n", auth_result);
}
static int m10bmc_sec_n3000_rsu_status(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell;
int ret;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return ret;
return FIELD_GET(DRBL_RSU_STATUS, doorbell);
}
static int m10bmc_sec_n6000_rsu_status(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 auth_result;
int ret;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->auth_result, &auth_result);
if (ret)
return ret;
return FIELD_GET(AUTH_RESULT_RSU_STATUS, auth_result);
}
static bool rsu_status_ok(u32 status)
{
return (status == RSU_STAT_NORMAL ||
status == RSU_STAT_NIOS_OK ||
status == RSU_STAT_USER_OK ||
status == RSU_STAT_FACTORY_OK);
}
static bool rsu_progress_done(u32 progress)
{
return (progress == RSU_PROG_IDLE ||
progress == RSU_PROG_RSU_DONE);
}
static bool rsu_progress_busy(u32 progress)
{
return (progress == RSU_PROG_AUTHENTICATING ||
progress == RSU_PROG_COPYING ||
progress == RSU_PROG_UPDATE_CANCEL ||
progress == RSU_PROG_PROGRAM_KEY_HASH);
}
static int m10bmc_sec_progress_status(struct m10bmc_sec *sec, u32 *doorbell_reg,
u32 *progress, u32 *status)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
int ret;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, doorbell_reg);
if (ret)
return ret;
ret = sec->ops->rsu_status(sec);
if (ret < 0)
return ret;
*status = ret;
*progress = rsu_prog(*doorbell_reg);
return 0;
}
static enum fw_upload_err rsu_check_idle(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell;
int ret;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
if (!rsu_progress_done(rsu_prog(doorbell))) {
log_error_regs(sec, doorbell);
return FW_UPLOAD_ERR_BUSY;
}
return FW_UPLOAD_ERR_NONE;
}
static inline bool rsu_start_done(u32 doorbell_reg, u32 progress, u32 status)
{
if (doorbell_reg & DRBL_RSU_REQUEST)
return false;
if (status == RSU_STAT_ERASE_FAIL || status == RSU_STAT_WEAROUT)
return true;
if (!rsu_progress_done(progress))
return true;
return false;
}
static enum fw_upload_err rsu_update_init(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell_reg, progress, status;
int ret, err;
ret = m10bmc_sys_update_bits(sec->m10bmc, csr_map->doorbell,
DRBL_RSU_REQUEST | DRBL_HOST_STATUS,
DRBL_RSU_REQUEST |
FIELD_PREP(DRBL_HOST_STATUS,
HOST_STATUS_IDLE));
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
ret = read_poll_timeout(m10bmc_sec_progress_status, err,
err < 0 || rsu_start_done(doorbell_reg, progress, status),
NIOS_HANDSHAKE_INTERVAL_US,
NIOS_HANDSHAKE_TIMEOUT_US,
false,
sec, &doorbell_reg, &progress, &status);
if (ret == -ETIMEDOUT) {
log_error_regs(sec, doorbell_reg);
return FW_UPLOAD_ERR_TIMEOUT;
} else if (err) {
return FW_UPLOAD_ERR_RW_ERROR;
}
if (status == RSU_STAT_WEAROUT) {
dev_warn(sec->dev, "Excessive flash update count detected\n");
return FW_UPLOAD_ERR_WEAROUT;
} else if (status == RSU_STAT_ERASE_FAIL) {
log_error_regs(sec, doorbell_reg);
return FW_UPLOAD_ERR_HW_ERROR;
}
return FW_UPLOAD_ERR_NONE;
}
static enum fw_upload_err rsu_prog_ready(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
unsigned long poll_timeout;
u32 doorbell, progress;
int ret;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
poll_timeout = jiffies + msecs_to_jiffies(RSU_PREP_TIMEOUT_MS);
while (rsu_prog(doorbell) == RSU_PROG_PREPARE) {
msleep(RSU_PREP_INTERVAL_MS);
if (time_after(jiffies, poll_timeout))
break;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
}
progress = rsu_prog(doorbell);
if (progress == RSU_PROG_PREPARE) {
log_error_regs(sec, doorbell);
return FW_UPLOAD_ERR_TIMEOUT;
} else if (progress != RSU_PROG_READY) {
log_error_regs(sec, doorbell);
return FW_UPLOAD_ERR_HW_ERROR;
}
return FW_UPLOAD_ERR_NONE;
}
static enum fw_upload_err rsu_send_data(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell_reg, status;
int ret;
ret = m10bmc_sys_update_bits(sec->m10bmc, csr_map->doorbell,
DRBL_HOST_STATUS,
FIELD_PREP(DRBL_HOST_STATUS,
HOST_STATUS_WRITE_DONE));
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
ret = regmap_read_poll_timeout(sec->m10bmc->regmap,
csr_map->base + csr_map->doorbell,
doorbell_reg,
rsu_prog(doorbell_reg) != RSU_PROG_READY,
NIOS_HANDSHAKE_INTERVAL_US,
NIOS_HANDSHAKE_TIMEOUT_US);
if (ret == -ETIMEDOUT) {
log_error_regs(sec, doorbell_reg);
return FW_UPLOAD_ERR_TIMEOUT;
} else if (ret) {
return FW_UPLOAD_ERR_RW_ERROR;
}
ret = sec->ops->rsu_status(sec);
if (ret < 0)
return FW_UPLOAD_ERR_HW_ERROR;
status = ret;
if (!rsu_status_ok(status)) {
log_error_regs(sec, doorbell_reg);
return FW_UPLOAD_ERR_HW_ERROR;
}
return FW_UPLOAD_ERR_NONE;
}
static int rsu_check_complete(struct m10bmc_sec *sec, u32 *doorbell_reg)
{
u32 progress, status;
if (m10bmc_sec_progress_status(sec, doorbell_reg, &progress, &status))
return -EIO;
if (!rsu_status_ok(status))
return -EINVAL;
if (rsu_progress_done(progress))
return 0;
if (rsu_progress_busy(progress))
return -EAGAIN;
return -EINVAL;
}
static enum fw_upload_err rsu_cancel(struct m10bmc_sec *sec)
{
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell;
int ret;
ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
if (rsu_prog(doorbell) != RSU_PROG_READY)
return FW_UPLOAD_ERR_BUSY;
ret = m10bmc_sys_update_bits(sec->m10bmc, csr_map->doorbell,
DRBL_HOST_STATUS,
FIELD_PREP(DRBL_HOST_STATUS,
HOST_STATUS_ABORT_RSU));
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
return FW_UPLOAD_ERR_CANCELED;
}
static enum fw_upload_err m10bmc_sec_prepare(struct fw_upload *fwl,
const u8 *data, u32 size)
{
struct m10bmc_sec *sec = fwl->dd_handle;
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 ret;
sec->cancel_request = false;
if (!size || size > csr_map->staging_size)
return FW_UPLOAD_ERR_INVALID_SIZE;
if (sec->m10bmc->flash_bulk_ops)
if (sec->m10bmc->flash_bulk_ops->lock_write(sec->m10bmc))
return FW_UPLOAD_ERR_BUSY;
ret = rsu_check_idle(sec);
if (ret != FW_UPLOAD_ERR_NONE)
goto unlock_flash;
m10bmc_fw_state_set(sec->m10bmc, M10BMC_FW_STATE_SEC_UPDATE_PREPARE);
ret = rsu_update_init(sec);
if (ret != FW_UPLOAD_ERR_NONE)
goto fw_state_exit;
ret = rsu_prog_ready(sec);
if (ret != FW_UPLOAD_ERR_NONE)
goto fw_state_exit;
if (sec->cancel_request) {
ret = rsu_cancel(sec);
goto fw_state_exit;
}
m10bmc_fw_state_set(sec->m10bmc, M10BMC_FW_STATE_SEC_UPDATE_WRITE);
return FW_UPLOAD_ERR_NONE;
fw_state_exit:
m10bmc_fw_state_set(sec->m10bmc, M10BMC_FW_STATE_NORMAL);
unlock_flash:
if (sec->m10bmc->flash_bulk_ops)
sec->m10bmc->flash_bulk_ops->unlock_write(sec->m10bmc);
return ret;
}
#define WRITE_BLOCK_SIZE 0x4000 /* Default write-block size is 0x4000 bytes */
static enum fw_upload_err m10bmc_sec_fw_write(struct fw_upload *fwl, const u8 *data,
u32 offset, u32 size, u32 *written)
{
struct m10bmc_sec *sec = fwl->dd_handle;
const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
struct intel_m10bmc *m10bmc = sec->m10bmc;
u32 blk_size, doorbell;
int ret;
if (sec->cancel_request)
return rsu_cancel(sec);
ret = m10bmc_sys_read(m10bmc, csr_map->doorbell, &doorbell);
if (ret) {
return FW_UPLOAD_ERR_RW_ERROR;
} else if (rsu_prog(doorbell) != RSU_PROG_READY) {
log_error_regs(sec, doorbell);
return FW_UPLOAD_ERR_HW_ERROR;
}
WARN_ON_ONCE(WRITE_BLOCK_SIZE % regmap_get_reg_stride(m10bmc->regmap));
blk_size = min_t(u32, WRITE_BLOCK_SIZE, size);
ret = m10bmc_sec_write(sec, data, offset, blk_size);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
*written = blk_size;
return FW_UPLOAD_ERR_NONE;
}
static enum fw_upload_err m10bmc_sec_poll_complete(struct fw_upload *fwl)
{
struct m10bmc_sec *sec = fwl->dd_handle;
unsigned long poll_timeout;
u32 doorbell, result;
int ret;
if (sec->cancel_request)
return rsu_cancel(sec);
m10bmc_fw_state_set(sec->m10bmc, M10BMC_FW_STATE_SEC_UPDATE_PROGRAM);
result = rsu_send_data(sec);
if (result != FW_UPLOAD_ERR_NONE)
return result;
poll_timeout = jiffies + msecs_to_jiffies(RSU_COMPLETE_TIMEOUT_MS);
do {
msleep(RSU_COMPLETE_INTERVAL_MS);
ret = rsu_check_complete(sec, &doorbell);
} while (ret == -EAGAIN && !time_after(jiffies, poll_timeout));
if (ret == -EAGAIN) {
log_error_regs(sec, doorbell);
return FW_UPLOAD_ERR_TIMEOUT;
} else if (ret == -EIO) {
return FW_UPLOAD_ERR_RW_ERROR;
} else if (ret) {
log_error_regs(sec, doorbell);
return FW_UPLOAD_ERR_HW_ERROR;
}
return FW_UPLOAD_ERR_NONE;
}
/*
* m10bmc_sec_cancel() may be called asynchronously with an on-going update.
* All other functions are called sequentially in a single thread. To avoid
* contention on register accesses, m10bmc_sec_cancel() must only update
* the cancel_request flag. Other functions will check this flag and handle
* the cancel request synchronously.
*/
static void m10bmc_sec_cancel(struct fw_upload *fwl)
{
struct m10bmc_sec *sec = fwl->dd_handle;
sec->cancel_request = true;
}
static void m10bmc_sec_cleanup(struct fw_upload *fwl)
{
struct m10bmc_sec *sec = fwl->dd_handle;
(void)rsu_cancel(sec);
m10bmc_fw_state_set(sec->m10bmc, M10BMC_FW_STATE_NORMAL);
if (sec->m10bmc->flash_bulk_ops)
sec->m10bmc->flash_bulk_ops->unlock_write(sec->m10bmc);
}
static const struct fw_upload_ops m10bmc_ops = {
.prepare = m10bmc_sec_prepare,
.write = m10bmc_sec_fw_write,
.poll_complete = m10bmc_sec_poll_complete,
.cancel = m10bmc_sec_cancel,
.cleanup = m10bmc_sec_cleanup,
};
static const struct m10bmc_sec_ops m10sec_n3000_ops = {
.rsu_status = m10bmc_sec_n3000_rsu_status,
};
static const struct m10bmc_sec_ops m10sec_n6000_ops = {
.rsu_status = m10bmc_sec_n6000_rsu_status,
};
#define SEC_UPDATE_LEN_MAX 32
static int m10bmc_sec_probe(struct platform_device *pdev)
{
char buf[SEC_UPDATE_LEN_MAX];
struct m10bmc_sec *sec;
struct fw_upload *fwl;
unsigned int len;
int ret;
sec = devm_kzalloc(&pdev->dev, sizeof(*sec), GFP_KERNEL);
if (!sec)
return -ENOMEM;
sec->dev = &pdev->dev;
sec->m10bmc = dev_get_drvdata(pdev->dev.parent);
sec->ops = (struct m10bmc_sec_ops *)platform_get_device_id(pdev)->driver_data;
dev_set_drvdata(&pdev->dev, sec);
ret = xa_alloc(&fw_upload_xa, &sec->fw_name_id, sec,
xa_limit_32b, GFP_KERNEL);
if (ret)
return ret;
len = scnprintf(buf, SEC_UPDATE_LEN_MAX, "secure-update%d",
sec->fw_name_id);
sec->fw_name = kmemdup_nul(buf, len, GFP_KERNEL);
if (!sec->fw_name) {
ret = -ENOMEM;
goto fw_name_fail;
}
fwl = firmware_upload_register(THIS_MODULE, sec->dev, sec->fw_name,
&m10bmc_ops, sec);
if (IS_ERR(fwl)) {
dev_err(sec->dev, "Firmware Upload driver failed to start\n");
ret = PTR_ERR(fwl);
goto fw_uploader_fail;
}
sec->fwl = fwl;
return 0;
fw_uploader_fail:
kfree(sec->fw_name);
fw_name_fail:
xa_erase(&fw_upload_xa, sec->fw_name_id);
return ret;
}
static void m10bmc_sec_remove(struct platform_device *pdev)
{
struct m10bmc_sec *sec = dev_get_drvdata(&pdev->dev);
firmware_upload_unregister(sec->fwl);
kfree(sec->fw_name);
xa_erase(&fw_upload_xa, sec->fw_name_id);
}
static const struct platform_device_id intel_m10bmc_sec_ids[] = {
{
.name = "n3000bmc-sec-update",
.driver_data = (kernel_ulong_t)&m10sec_n3000_ops,
},
{
.name = "d5005bmc-sec-update",
.driver_data = (kernel_ulong_t)&m10sec_n3000_ops,
},
{
.name = "n6000bmc-sec-update",
.driver_data = (kernel_ulong_t)&m10sec_n6000_ops,
},
{ }
};
MODULE_DEVICE_TABLE(platform, intel_m10bmc_sec_ids);
static struct platform_driver intel_m10bmc_sec_driver = {
.probe = m10bmc_sec_probe,
.remove_new = m10bmc_sec_remove,
.driver = {
.name = "intel-m10bmc-sec-update",
.dev_groups = m10bmc_sec_attr_groups,
},
.id_table = intel_m10bmc_sec_ids,
};
module_platform_driver(intel_m10bmc_sec_driver);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel MAX10 BMC Secure Update");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(INTEL_M10_BMC_CORE);