[PATCH v3 1/2] drivers: tee: broadcom: add optee based bnxt fw load driver

[Simon Glass]

Hi Rayagonda,

On Wed, 10 Jun 2020 at 05:15, Rayagonda Kokatanur
<rayagonda.kokatanur at broadcom.com> wrote:
>
> From: Vikas Gupta <vikas.gupta at broadcom.com>
>
> Add optee based bnxt fw load driver.
> bnxt is Broadcom NetXtreme controller Ethernet card.
> This driver is used to load bnxt firmware binary using OpTEE.
>
> Signed-off-by: Vikas Gupta <vikas.gupta at broadcom.com>
> Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur at broadcom.com>
> ---
> Changes from v2:
>  -Address review comments from Simon,
>   Remove own return code and use standard error code.
>   Take out common lines from different functions and move them
>   into common static function.
>   Remove include <common.h> as its not required.
>   Move functions with printf from header file into c file.
>
>  drivers/tee/Kconfig                |   1 +
>  drivers/tee/Makefile               |   1 +
>  drivers/tee/broadcom/Kconfig       |   7 ++
>  drivers/tee/broadcom/Makefile      |   3 +
>  drivers/tee/broadcom/chimp_optee.c | 182 +++++++++++++++++++++++++++++
>  include/broadcom/chimp.h           |  16 +++
>  6 files changed, 210 insertions(+)
>  create mode 100644 drivers/tee/broadcom/Kconfig
>  create mode 100644 drivers/tee/broadcom/Makefile
>  create mode 100644 drivers/tee/broadcom/chimp_optee.c
>  create mode 100644 include/broadcom/chimp.h
>
> diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig
> index 5c0c89043f..5ca5a0836c 100644
> --- a/drivers/tee/Kconfig
> +++ b/drivers/tee/Kconfig
> @@ -29,6 +29,7 @@ config SANDBOX_TEE
>           "avb" commands.
>
>  source "drivers/tee/optee/Kconfig"
> +source "drivers/tee/broadcom/Kconfig"
>
>  endmenu
>
> diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile
> index f72c68c09f..5c8ffdbce8 100644
> --- a/drivers/tee/Makefile
> +++ b/drivers/tee/Makefile
> @@ -3,3 +3,4 @@
>  obj-y += tee-uclass.o
>  obj-$(CONFIG_SANDBOX) += sandbox.o
>  obj-$(CONFIG_OPTEE) += optee/
> +obj-y += broadcom/
> diff --git a/drivers/tee/broadcom/Kconfig b/drivers/tee/broadcom/Kconfig
> new file mode 100644
> index 0000000000..ce95072d4e
> --- /dev/null
> +++ b/drivers/tee/broadcom/Kconfig
> @@ -0,0 +1,7 @@
> +config CHIMP_OPTEE
> +       bool "Enable secure ChiMP firmware loading"
> +       depends on OPTEE
> +       default y
> +       help
> +         This driver is used to load bnxt firmware binary using OpTEE.
> +         bnxt is Broadcom NetXtreme controller Ethernet card.
> diff --git a/drivers/tee/broadcom/Makefile b/drivers/tee/broadcom/Makefile
> new file mode 100644
> index 0000000000..cb3cef16df
> --- /dev/null
> +++ b/drivers/tee/broadcom/Makefile
> @@ -0,0 +1,3 @@
> +# SPDX-License-Identifier: GPL-2.0+
> +
> +obj-y += chimp_optee.o
> diff --git a/drivers/tee/broadcom/chimp_optee.c b/drivers/tee/broadcom/chimp_optee.c
> new file mode 100644
> index 0000000000..4ca1b59c6a
> --- /dev/null
> +++ b/drivers/tee/broadcom/chimp_optee.c
> @@ -0,0 +1,182 @@
> +// SPDX-License-Identifier: BSD-2-Clause
> +/*
> + * Copyright 2020 Broadcom.
> + */
> +
> +#include <common.h>
> +#include <tee.h>
> +#include <broadcom/chimp.h>
> +
> +#ifdef CONFIG_CHIMP_OPTEE
> +
> +#define CHMIP_BOOT_UUID { 0x6272636D, 0x2019, 0x0716, \
> +                  { 0x42, 0x43, 0x4D, 0x5F, 0x53, 0x43, 0x48, 0x49 } }
> +
> +enum {
> +       TEE_CHIMP_FASTBOOT = 0,
> +       TEE_CHIMP_HEALTH_STATUS,
> +       TEE_CHIMP_HANDSHAKE_STATUS,
> +} tee_chmip_cmd;
> +
> +struct bcm_chimp_data {
> +       struct udevice *tee;
> +       u32 session;
> +} chimp_data;
> +
> +static int get_open_session(struct bcm_chimp_data *b_data)
> +{
> +       struct udevice *tee = NULL;
> +
> +       while (!b_data->tee) {
> +               const struct tee_optee_ta_uuid uuid = CHMIP_BOOT_UUID;
> +               struct tee_open_session_arg arg;
> +               int rc;
> +
> +               tee = tee_find_device(tee, NULL, NULL, NULL);
> +               if (!tee)
> +                       return -ENODEV;
> +
> +               memset(&arg, 0, sizeof(arg));
> +               tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
> +               rc = tee_open_session(tee, &arg, 0, NULL);
> +               if (!rc) {
> +                       b_data->tee = tee;
> +                       b_data->session = arg.session;
> +               }
> +       }
> +

Is this looping forever? Should you return -ETIMEDOUT using
get_timer() to check this?

> diff --git a/include/broadcom/chimp.h b/include/broadcom/chimp.h
> new file mode 100644
> index 0000000000..2397e13da0
> --- /dev/null
> +++ b/include/broadcom/chimp.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Copyright 2020 Broadcom.
> + *
> + */
> +
> +#ifndef __CHIMP_H__
> +#define __CHIMP_H__
> +
> +#include <linux/compiler.h>
> +
> +int chimp_fastboot_optee(void);
> +int chimp_health_status_optee(u32 *status);
> +int chimp_handshake_status_optee(u32 timeout, u32 *hstatus);

Please add comments for each function .

> +
> +#endif
> --
> 2.17.1
>

Regards,
Simon