linux-kernel - RE: [PATCH v1 1/1 RESEND] platform/mellanox: add firmware reset support

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Date:   Wed, 5 Apr 2023 14:39:52 +0000
From:   Khalil Blaiech <kblaiech@...dia.com>
To:     Hans de Goede <hdegoede@...hat.com>,
        "markgross@...nel.org" <markgross@...nel.org>,
        Vadim Pasternak <vadimp@...dia.com>
CC:     "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        David Thompson <davthompson@...dia.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v1 1/1 RESEND] platform/mellanox: add firmware reset
 support

Hi Hans,

Actually, my first patch was posted back on Feb 8, 2023.
On April 4, I resent the patch without RESEND tag, thus the new patch in less than 24h.

Apologies if I did something wrong.

Thanks,
-Khalil

-----Original Message-----
From: Hans de Goede <hdegoede@...hat.com> 
Sent: Wednesday, April 5, 2023 10:33 AM
To: Khalil Blaiech <kblaiech@...dia.com>; markgross@...nel.org; Vadim Pasternak <vadimp@...dia.com>
Cc: platform-driver-x86@...r.kernel.org; David Thompson <davthompson@...dia.com>; linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/1 RESEND] platform/mellanox: add firmware reset support

Hi Khalil,

On 4/5/23 15:16, Khalil Blaiech wrote:
> Add a new sysfs to initiate firmware reset in isolation mode.
> 
> Reviewed-by: David Thompson <davthompson@...dia.com>
> Signed-off-by: Khalil Blaiech <kblaiech@...dia.com>

Why are you resending this less then 24 hours after the initial submission ?

Regards,

Hans


> ---
>  drivers/platform/mellanox/mlxbf-bootctl.c | 19 +++++++++++++++++++  
> drivers/platform/mellanox/mlxbf-bootctl.h |  6 ++++++
>  2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c 
> b/drivers/platform/mellanox/mlxbf-bootctl.c
> index 1c7a288b59a5..5e41c270195c 100644
> --- a/drivers/platform/mellanox/mlxbf-bootctl.c
> +++ b/drivers/platform/mellanox/mlxbf-bootctl.c
> @@ -244,11 +244,29 @@ static ssize_t secure_boot_fuse_state_show(struct device *dev,
>  	return buf_len;
>  }
>  
> +static ssize_t fw_reset_store(struct device *dev,
> +			      struct device_attribute *attr,
> +			      const char *buf, size_t count) {
> +	unsigned long key;
> +	int err;
> +
> +	err = kstrtoul(buf, 16, &key);
> +	if (err)
> +		return err;
> +
> +	if (mlxbf_bootctl_smc(MLXBF_BOOTCTL_FW_RESET, key) < 0)
> +		return -EINVAL;
> +
> +	return count;
> +}
> +
>  static DEVICE_ATTR_RW(post_reset_wdog);  static 
> DEVICE_ATTR_RW(reset_action);  static 
> DEVICE_ATTR_RW(second_reset_action);
>  static DEVICE_ATTR_RO(lifecycle_state);  static 
> DEVICE_ATTR_RO(secure_boot_fuse_state);
> +static DEVICE_ATTR_WO(fw_reset);
>  
>  static struct attribute *mlxbf_bootctl_attrs[] = {
>  	&dev_attr_post_reset_wdog.attr,
> @@ -256,6 +274,7 @@ static struct attribute *mlxbf_bootctl_attrs[] = {
>  	&dev_attr_second_reset_action.attr,
>  	&dev_attr_lifecycle_state.attr,
>  	&dev_attr_secure_boot_fuse_state.attr,
> +	&dev_attr_fw_reset.attr,
>  	NULL
>  };
>  
> diff --git a/drivers/platform/mellanox/mlxbf-bootctl.h 
> b/drivers/platform/mellanox/mlxbf-bootctl.h
> index 148fdb43b435..b48243f60a59 100644
> --- a/drivers/platform/mellanox/mlxbf-bootctl.h
> +++ b/drivers/platform/mellanox/mlxbf-bootctl.h
> @@ -75,6 +75,12 @@
>  
>  #define MLXBF_BOOTCTL_GET_DIMM_INFO		0x82000008
>  
> +/*
> + * Initiate Firmware Reset via TYU. This might be invoked during the 
> +reset
> + * flow in isolation mode.
> + */
> +#define MLXBF_BOOTCTL_FW_RESET  0x8200000D
> +
>  /* SMC function IDs for SiP Service queries */
>  #define MLXBF_BOOTCTL_SIP_SVC_CALL_COUNT	0x8200ff00
>  #define MLXBF_BOOTCTL_SIP_SVC_UID		0x8200ff01