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

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Message-ID: <MN2PR12MB3616910645B1BDDDDC5B823DAB909@MN2PR12MB3616.namprd12.prod.outlook.com>
Date:   Wed, 5 Apr 2023 14:40:36 +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

Understood. And sorry about that.

Thanks Hans

-----Original Message-----
From: Hans de Goede <hdegoede@...hat.com> 
Sent: Wednesday, April 5, 2023 10:34 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,

On 4/5/23 16:33, Hans de Goede wrote:
> 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 ?

Never mind, I see you added a missing Cc: platform-driver-x86@...r.kernel.org
which is good.

Next time please add a little note to the resend explaining why you are resending it though.

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
>