mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
firmware: broadcom: add OP-TEE based BNXT f/w manager
This driver registers on TEE bus to interact with OP-TEE based BNXT firmware management modules Cc: Jakub Kicinski <jakub.kicinski@netronome.com> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com> Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vikas Gupta
David S. Miller
parent
8c933eab2d
commit
246880958a
4 changed files with 302 additions and 0 deletions
|
|
@ -22,3 +22,11 @@ config BCM47XX_SPROM
|
|||
In case of SoC devices SPROM content is stored on a flash used by
|
||||
bootloader firmware CFE. This driver provides method to ssb and bcma
|
||||
drivers to read SPROM on SoC.
|
||||
|
||||
config TEE_BNXT_FW
|
||||
tristate "Broadcom BNXT firmware manager"
|
||||
depends on (ARCH_BCM_IPROC && OPTEE) || (COMPILE_TEST && TEE)
|
||||
default ARCH_BCM_IPROC
|
||||
help
|
||||
This module help to manage firmware on Broadcom BNXT device. The module
|
||||
registers on tee bus and invoke calls to manage firmware on BNXT device.
|
||||
|
|
|
|||
|
|
@ -1,3 +1,4 @@
|
|||
# SPDX-License-Identifier: GPL-2.0-only
|
||||
obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx_nvram.o
|
||||
obj-$(CONFIG_BCM47XX_SPROM) += bcm47xx_sprom.o
|
||||
obj-$(CONFIG_TEE_BNXT_FW) += tee_bnxt_fw.o
|
||||
|
|
|
|||
279
drivers/firmware/broadcom/tee_bnxt_fw.c
Normal file
279
drivers/firmware/broadcom/tee_bnxt_fw.c
Normal file
|
|
@ -0,0 +1,279 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Copyright 2019 Broadcom.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/sizes.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include <linux/uuid.h>
|
||||
|
||||
#include <linux/firmware/broadcom/tee_bnxt_fw.h>
|
||||
|
||||
#define MAX_SHM_MEM_SZ SZ_4M
|
||||
|
||||
#define MAX_TEE_PARAM_ARRY_MEMB 4
|
||||
|
||||
enum ta_cmd {
|
||||
/*
|
||||
* TA_CMD_BNXT_FASTBOOT - boot bnxt device by copying f/w into sram
|
||||
*
|
||||
* param[0] unused
|
||||
* param[1] unused
|
||||
* param[2] unused
|
||||
* param[3] unused
|
||||
*
|
||||
* Result:
|
||||
* TEE_SUCCESS - Invoke command success
|
||||
* TEE_ERROR_ITEM_NOT_FOUND - Corrupt f/w image found on memory
|
||||
*/
|
||||
TA_CMD_BNXT_FASTBOOT = 0,
|
||||
|
||||
/*
|
||||
* TA_CMD_BNXT_COPY_COREDUMP - copy the core dump into shm
|
||||
*
|
||||
* param[0] (inout memref) - Coredump buffer memory reference
|
||||
* param[1] (in value) - value.a: offset, data to be copied from
|
||||
* value.b: size of data to be copied
|
||||
* param[2] unused
|
||||
* param[3] unused
|
||||
*
|
||||
* Result:
|
||||
* TEE_SUCCESS - Invoke command success
|
||||
* TEE_ERROR_BAD_PARAMETERS - Incorrect input param
|
||||
* TEE_ERROR_ITEM_NOT_FOUND - Corrupt core dump
|
||||
*/
|
||||
TA_CMD_BNXT_COPY_COREDUMP = 3,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_bnxt_fw_private - OP-TEE bnxt private data
|
||||
* @dev: OP-TEE based bnxt device.
|
||||
* @ctx: OP-TEE context handler.
|
||||
* @session_id: TA session identifier.
|
||||
*/
|
||||
struct tee_bnxt_fw_private {
|
||||
struct device *dev;
|
||||
struct tee_context *ctx;
|
||||
u32 session_id;
|
||||
struct tee_shm *fw_shm_pool;
|
||||
};
|
||||
|
||||
static struct tee_bnxt_fw_private pvt_data;
|
||||
|
||||
static void prepare_args(int cmd,
|
||||
struct tee_ioctl_invoke_arg *arg,
|
||||
struct tee_param *param)
|
||||
{
|
||||
memset(arg, 0, sizeof(*arg));
|
||||
memset(param, 0, MAX_TEE_PARAM_ARRY_MEMB * sizeof(*param));
|
||||
|
||||
arg->func = cmd;
|
||||
arg->session = pvt_data.session_id;
|
||||
arg->num_params = MAX_TEE_PARAM_ARRY_MEMB;
|
||||
|
||||
/* Fill invoke cmd params */
|
||||
switch (cmd) {
|
||||
case TA_CMD_BNXT_COPY_COREDUMP:
|
||||
param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
|
||||
param[0].u.memref.shm = pvt_data.fw_shm_pool;
|
||||
param[0].u.memref.size = MAX_SHM_MEM_SZ;
|
||||
param[0].u.memref.shm_offs = 0;
|
||||
param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
|
||||
break;
|
||||
case TA_CMD_BNXT_FASTBOOT:
|
||||
default:
|
||||
/* Nothing to do */
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* tee_bnxt_fw_load() - Load the bnxt firmware
|
||||
* Uses an OP-TEE call to start a secure
|
||||
* boot process.
|
||||
* Returns 0 on success, negative errno otherwise.
|
||||
*/
|
||||
int tee_bnxt_fw_load(void)
|
||||
{
|
||||
int ret = 0;
|
||||
struct tee_ioctl_invoke_arg arg;
|
||||
struct tee_param param[MAX_TEE_PARAM_ARRY_MEMB];
|
||||
|
||||
if (!pvt_data.ctx)
|
||||
return -ENODEV;
|
||||
|
||||
prepare_args(TA_CMD_BNXT_FASTBOOT, &arg, param);
|
||||
|
||||
ret = tee_client_invoke_func(pvt_data.ctx, &arg, param);
|
||||
if (ret < 0 || arg.ret != 0) {
|
||||
dev_err(pvt_data.dev,
|
||||
"TA_CMD_BNXT_FASTBOOT invoke failed TEE err: %x, ret:%x\n",
|
||||
arg.ret, ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(tee_bnxt_fw_load);
|
||||
|
||||
/**
|
||||
* tee_bnxt_copy_coredump() - Copy coredump from the allocated memory
|
||||
* Uses an OP-TEE call to copy coredump
|
||||
* @buf: destination buffer where core dump is copied into
|
||||
* @offset: offset from the base address of core dump area
|
||||
* @size: size of the dump
|
||||
*
|
||||
* Returns 0 on success, negative errno otherwise.
|
||||
*/
|
||||
int tee_bnxt_copy_coredump(void *buf, u32 offset, u32 size)
|
||||
{
|
||||
struct tee_ioctl_invoke_arg arg;
|
||||
struct tee_param param[MAX_TEE_PARAM_ARRY_MEMB];
|
||||
void *core_data;
|
||||
u32 rbytes = size;
|
||||
u32 nbytes = 0;
|
||||
int ret = 0;
|
||||
|
||||
if (!pvt_data.ctx)
|
||||
return -ENODEV;
|
||||
|
||||
prepare_args(TA_CMD_BNXT_COPY_COREDUMP, &arg, param);
|
||||
|
||||
while (rbytes) {
|
||||
nbytes = rbytes;
|
||||
|
||||
nbytes = min_t(u32, rbytes, param[0].u.memref.size);
|
||||
|
||||
/* Fill additional invoke cmd params */
|
||||
param[1].u.value.a = offset;
|
||||
param[1].u.value.b = nbytes;
|
||||
|
||||
ret = tee_client_invoke_func(pvt_data.ctx, &arg, param);
|
||||
if (ret < 0 || arg.ret != 0) {
|
||||
dev_err(pvt_data.dev,
|
||||
"TA_CMD_BNXT_COPY_COREDUMP invoke failed TEE err: %x, ret:%x\n",
|
||||
arg.ret, ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
core_data = tee_shm_get_va(pvt_data.fw_shm_pool, 0);
|
||||
if (IS_ERR(core_data)) {
|
||||
dev_err(pvt_data.dev, "tee_shm_get_va failed\n");
|
||||
return PTR_ERR(core_data);
|
||||
}
|
||||
|
||||
memcpy(buf, core_data, nbytes);
|
||||
|
||||
rbytes -= nbytes;
|
||||
buf += nbytes;
|
||||
offset += nbytes;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(tee_bnxt_copy_coredump);
|
||||
|
||||
static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data)
|
||||
{
|
||||
return (ver->impl_id == TEE_IMPL_ID_OPTEE);
|
||||
}
|
||||
|
||||
static int tee_bnxt_fw_probe(struct device *dev)
|
||||
{
|
||||
struct tee_client_device *bnxt_device = to_tee_client_device(dev);
|
||||
int ret, err = -ENODEV;
|
||||
struct tee_ioctl_open_session_arg sess_arg;
|
||||
struct tee_shm *fw_shm_pool;
|
||||
|
||||
memset(&sess_arg, 0, sizeof(sess_arg));
|
||||
|
||||
/* Open context with TEE driver */
|
||||
pvt_data.ctx = tee_client_open_context(NULL, optee_ctx_match, NULL,
|
||||
NULL);
|
||||
if (IS_ERR(pvt_data.ctx))
|
||||
return -ENODEV;
|
||||
|
||||
/* Open session with Bnxt load Trusted App */
|
||||
memcpy(sess_arg.uuid, bnxt_device->id.uuid.b, TEE_IOCTL_UUID_LEN);
|
||||
sess_arg.clnt_login = TEE_IOCTL_LOGIN_PUBLIC;
|
||||
sess_arg.num_params = 0;
|
||||
|
||||
ret = tee_client_open_session(pvt_data.ctx, &sess_arg, NULL);
|
||||
if (ret < 0 || sess_arg.ret != 0) {
|
||||
dev_err(dev, "tee_client_open_session failed, err: %x\n",
|
||||
sess_arg.ret);
|
||||
err = -EINVAL;
|
||||
goto out_ctx;
|
||||
}
|
||||
pvt_data.session_id = sess_arg.session;
|
||||
|
||||
pvt_data.dev = dev;
|
||||
|
||||
fw_shm_pool = tee_shm_alloc(pvt_data.ctx, MAX_SHM_MEM_SZ,
|
||||
TEE_SHM_MAPPED | TEE_SHM_DMA_BUF);
|
||||
if (IS_ERR(fw_shm_pool)) {
|
||||
tee_client_close_context(pvt_data.ctx);
|
||||
dev_err(pvt_data.dev, "tee_shm_alloc failed\n");
|
||||
err = PTR_ERR(fw_shm_pool);
|
||||
goto out_sess;
|
||||
}
|
||||
|
||||
pvt_data.fw_shm_pool = fw_shm_pool;
|
||||
|
||||
return 0;
|
||||
|
||||
out_sess:
|
||||
tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
|
||||
out_ctx:
|
||||
tee_client_close_context(pvt_data.ctx);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int tee_bnxt_fw_remove(struct device *dev)
|
||||
{
|
||||
tee_shm_free(pvt_data.fw_shm_pool);
|
||||
tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
|
||||
tee_client_close_context(pvt_data.ctx);
|
||||
pvt_data.ctx = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct tee_client_device_id tee_bnxt_fw_id_table[] = {
|
||||
{UUID_INIT(0x6272636D, 0x2019, 0x0716,
|
||||
0x42, 0x43, 0x4D, 0x5F, 0x53, 0x43, 0x48, 0x49)},
|
||||
{}
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(tee, tee_bnxt_fw_id_table);
|
||||
|
||||
static struct tee_client_driver tee_bnxt_fw_driver = {
|
||||
.id_table = tee_bnxt_fw_id_table,
|
||||
.driver = {
|
||||
.name = KBUILD_MODNAME,
|
||||
.bus = &tee_bus_type,
|
||||
.probe = tee_bnxt_fw_probe,
|
||||
.remove = tee_bnxt_fw_remove,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init tee_bnxt_fw_mod_init(void)
|
||||
{
|
||||
return driver_register(&tee_bnxt_fw_driver.driver);
|
||||
}
|
||||
|
||||
static void __exit tee_bnxt_fw_mod_exit(void)
|
||||
{
|
||||
driver_unregister(&tee_bnxt_fw_driver.driver);
|
||||
}
|
||||
|
||||
module_init(tee_bnxt_fw_mod_init);
|
||||
module_exit(tee_bnxt_fw_mod_exit);
|
||||
|
||||
MODULE_AUTHOR("Vikas Gupta <vikas.gupta@broadcom.com>");
|
||||
MODULE_DESCRIPTION("Broadcom bnxt firmware manager");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
14
include/linux/firmware/broadcom/tee_bnxt_fw.h
Normal file
14
include/linux/firmware/broadcom/tee_bnxt_fw.h
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
/* SPDX-License-Identifier: BSD-2-Clause */
|
||||
/*
|
||||
* Copyright 2019 Broadcom.
|
||||
*/
|
||||
|
||||
#ifndef _BROADCOM_TEE_BNXT_FW_H
|
||||
#define _BROADCOM_TEE_BNXT_FW_H
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
int tee_bnxt_fw_load(void);
|
||||
int tee_bnxt_copy_coredump(void *buf, u32 offset, u32 size);
|
||||
|
||||
#endif /* _BROADCOM_TEE_BNXT_FW_H */
|
||||
Loading…
Reference in a new issue