linux-kernel - Re: [PATCH] ipmi: setting OS name as Linux in BMC

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Date:	Tue, 26 Jun 2012 08:39:48 -0500
From:	Corey Minyard <tcminyard@...il.com>
To:	Srinivas_G_Gowda@...l.com
CC:	linux-kernel@...r.kernel.org, openipmi@...sta.com
Subject: Re: [PATCH] ipmi: setting OS name as Linux in BMC

The idea here is fine, but it's probably more appropriate to do this in 
ipmi_msghandler.c, not ipmi_si_intf.c, since the latter only handles 
some interface types.

-corey

On 06/26/2012 08:24 AM, Srinivas_G_Gowda@...l.com wrote:
> There is an option in IPMI Spec using which BMC can be made aware
> of the OS name that it is talking to.
> IPMI_Spec-IPMI2_0E4_061209  -  ref - 22.14a ,  [Set System Info]
>
> This patch will update the OS name as "Linux" in BMC during
> IPMI Driver initialization. In the current patch, declaration of
> the OS name is done only for the Volatile param.
>
> Signed-off-by: Srinivas Gowda G<Srinivas_G_Gowda@...l.com>
> ---
>   drivers/char/ipmi/ipmi_si_intf.c |   72 ++++++++++++++++++++++++++++++++++++++
>   include/linux/ipmi_msgdefs.h     |    1 +
>   2 files changed, 73 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
> index 1e638ff..df995b4 100644
> --- a/drivers/char/ipmi/ipmi_si_intf.c
> +++ b/drivers/char/ipmi/ipmi_si_intf.c
> @@ -2709,6 +2709,71 @@ static int try_get_dev_id(struct smi_info *smi_info)
>   	return rv;
>   }
>
> +/*
> + * Set the Operating System Name as "Linux" using "Set System Info" command.
> + * Only setting Volatile variable - Parameter 4
> + */
> +static int try_set_system_info_os_name(struct smi_info *smi_info)
> +{
> +	unsigned char         msg[11];
> +	unsigned char         *resp;
> +	unsigned char         param_select;
> +	unsigned char	      set_selector;		
> +	unsigned char         string_encode;
> +	unsigned char         str_len;
> +	unsigned long         resp_len;
> +	int                   rv = 0;
> +
> +	resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
> +	if (!resp)
> +		return -ENOMEM;
> +
> +	param_select = 4;	/* parameter number for volatile OS name */
> +	set_selector = 0;	/* set selector, block 0 */
> +	string_encode = 0;	/* ASCII Encoding */
> +	str_len = 5;		/* length of ASCII string - "Linux" */
> +
> +	msg[0] = IPMI_NETFN_APP_REQUEST<<  2;
> +	msg[1] = IPMI_SET_SYSTEM_INFO;
> +	msg[2] = param_select;
> +	msg[3] = set_selector;
> +	msg[4] = string_encode;	
> +	msg[5] = str_len;
> +	msg[6] =  'L';	
> +	msg[7] =  'i';	
> +	msg[8] =  'n';	
> +	msg[9] =  'u';	
> +	msg[10] = 'x';	
> +
> +	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 11);
> +
> +	rv = wait_for_msg_done(smi_info);
> +	if (rv)
> +		goto out;
> +
> +	resp_len = smi_info->handlers->get_result(smi_info->si_sm,
> +						  resp, IPMI_MAX_MSG_LENGTH);
> +
> +	if (resp_len<  3 ||
> +			resp[0] != (IPMI_NETFN_APP_REQUEST | 1)<<  2 ||
> +			resp[1] != IPMI_SET_SYSTEM_INFO   ||
> +			resp[2] != 0) {
> +		if (resp_len == 3 )
> +			 rv = resp[2];
> +		printk(KERN_WARNING PFX "Failed to set OS name as Linux: 0x%X\n", rv);
> +
> +		rv = -EINVAL;
> +		goto out;
> +	}
> +	else
> +		/* Volatile Opertaing System name */
> +		printk(KERN_INFO PFX "OS Name successfully set as Linux\n");
> +
> + out:
> +	kfree(resp);
> +	return rv;
> +}
> +
>   static int try_enable_event_buffer(struct smi_info *smi_info)
>   {
>   	unsigned char         msg[3];
> @@ -3216,6 +3281,13 @@ static int try_smi_init(struct smi_info *new_smi)
>   	new_smi->intf_num = smi_num;
>   	smi_num++;
>
> +	/*
> + 	 * Set the OS in BMC as "Linux" using "Set System Info" Command
> + 	 */
> +	rv = try_set_system_info_os_name(new_smi);
> +	if(rv)
> +		printk(KERN_WARNING PFX "Could not set OS Name in BMC\n");
> +		
>   	rv = try_enable_event_buffer(new_smi);
>   	if (rv == 0)
>   		new_smi->has_event_buffer = 1;
> diff --git a/include/linux/ipmi_msgdefs.h b/include/linux/ipmi_msgdefs.h
> index df97e6e..b5ea664 100644
> --- a/include/linux/ipmi_msgdefs.h
> +++ b/include/linux/ipmi_msgdefs.h
> @@ -57,6 +57,7 @@
>   #define IPMI_GET_BMC_GLOBAL_ENABLES_CMD	0x2f
>   #define IPMI_READ_EVENT_MSG_BUFFER_CMD	0x35
>   #define IPMI_GET_CHANNEL_INFO_CMD	0x42
> +#define IPMI_SET_SYSTEM_INFO		0x58
>
>   /* Bit for BMC global enables. */
>   #define IPMI_BMC_RCV_MSG_INTR     0x01

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