Commit dd2bc5cc authored by Quan Nguyen's avatar Quan Nguyen Committed by Corey Minyard
Browse files

ipmi: ssif_bmc: Add SSIF BMC driver 

The SMBus system interface (SSIF) IPMI BMC driver can be used to perform
in-band IPMI communication with their host in management (BMC) side.

Thanks Dan for the copy_from_user() fix in the link below.

Link: https://lore.kernel.org/linux-arm-kernel/20220310114119.13736-4-quan@os.amperecomputing.com/


Signed-off-by: default avatarQuan Nguyen <quan@os.amperecomputing.com>
Message-Id: <20221004093106.1653317-2-quan@os.amperecomputing.com>
Signed-off-by: default avatarCorey Minyard <cminyard@mvista.com>
parent 9abf2313

drivers/char/ipmi/Kconfig

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@@ -169,6 +169,16 @@ config ASPEED_BT_IPMI_BMC 
	  found on Aspeed SOCs (AST2400 and AST2500). The driver

	  implements the BMC side of the BT interface.



config SSIF_IPMI_BMC

	tristate "SSIF IPMI BMC driver"

	depends on I2C && I2C_SLAVE

	help

	  This enables the IPMI SMBus system interface (SSIF) at the

	  management (BMC) side.



	  The driver implements the BMC side of the SMBus system

	  interface (SSIF).



config IPMB_DEVICE_INTERFACE

	tristate 'IPMB Interface handler'

	depends on I2C

drivers/char/ipmi/Makefile

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@@ -30,3 +30,4 @@ obj-$(CONFIG_ASPEED_BT_IPMI_BMC) += bt-bmc.o 
obj-$(CONFIG_ASPEED_KCS_IPMI_BMC) += kcs_bmc_aspeed.o

obj-$(CONFIG_NPCM7XX_KCS_IPMI_BMC) += kcs_bmc_npcm7xx.o

obj-$(CONFIG_IPMB_DEVICE_INTERFACE) += ipmb_dev_int.o

obj-$(CONFIG_SSIF_IPMI_BMC) += ssif_bmc.o

drivers/char/ipmi/ssif_bmc.c

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+873 −0

File added.

Preview size limit exceeded, changes collapsed.

include/uapi/linux/ipmi_ssif_bmc.h

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/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note*/

/*

 * Copyright (c) 2022, Ampere Computing LLC.

 */



#ifndef _UAPI_LINUX_IPMI_SSIF_BMC_H

#define _UAPI_LINUX_IPMI_SSIF_BMC_H



#include <linux/types.h>



/* Max length of ipmi ssif message included netfn and cmd field */

#define IPMI_SSIF_PAYLOAD_MAX         254

struct ipmi_ssif_msg {

	unsigned int len;

	__u8    payload[IPMI_SSIF_PAYLOAD_MAX];

};



#endif /* _UAPI_LINUX_IPMI_SSIF_BMC_H */