Commit 90563ec4 authored by Doug Warzecha's avatar Doug Warzecha Committed by Linus Torvalds

[PATCH] dcdbas: add Dell Systems Management Base Driver with sysfs support

This patch adds the Dell Systems Management Base Driver with sysfs support.

This driver has been tested with Dell OpenManage.
Signed-off-by: default avatarDoug Warzecha <Douglas_Warzecha@dell.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6c54c28e
Overview
The Dell Systems Management Base Driver provides a sysfs interface for
systems management software such as Dell OpenManage to perform system
management interrupts and host control actions (system power cycle or
power off after OS shutdown) on certain Dell systems.
Dell OpenManage requires this driver on the following Dell PowerEdge systems:
300, 1300, 1400, 400SC, 500SC, 1500SC, 1550, 600SC, 1600SC, 650, 1655MC,
700, and 750. Other Dell software such as the open source libsmbios project
is expected to make use of this driver, and it may include the use of this
driver on other Dell systems.
The Dell libsmbios project aims towards providing access to as much BIOS
information as possible. See http://linux.dell.com/libsmbios/main/ for
more information about the libsmbios project.
System Management Interrupt
On some Dell systems, systems management software must access certain
management information via a system management interrupt (SMI). The SMI data
buffer must reside in 32-bit address space, and the physical address of the
buffer is required for the SMI. The driver maintains the memory required for
the SMI and provides a way for the application to generate the SMI.
The driver creates the following sysfs entries for systems management
software to perform these system management interrupts:
/sys/devices/platform/dcdbas/smi_data
/sys/devices/platform/dcdbas/smi_data_buf_phys_addr
/sys/devices/platform/dcdbas/smi_data_buf_size
/sys/devices/platform/dcdbas/smi_request
Systems management software must perform the following steps to execute
a SMI using this driver:
1) Lock smi_data.
2) Write system management command to smi_data.
3) Write "1" to smi_request to generate a calling interface SMI or
"2" to generate a raw SMI.
4) Read system management command response from smi_data.
5) Unlock smi_data.
Host Control Action
Dell OpenManage supports a host control feature that allows the administrator
to perform a power cycle or power off of the system after the OS has finished
shutting down. On some Dell systems, this host control feature requires that
a driver perform a SMI after the OS has finished shutting down.
The driver creates the following sysfs entries for systems management software
to schedule the driver to perform a power cycle or power off host control
action after the system has finished shutting down:
/sys/devices/platform/dcdbas/host_control_action
/sys/devices/platform/dcdbas/host_control_smi_type
/sys/devices/platform/dcdbas/host_control_on_shutdown
Dell OpenManage performs the following steps to execute a power cycle or
power off host control action using this driver:
1) Write host control action to be performed to host_control_action.
2) Write type of SMI that driver needs to perform to host_control_smi_type.
3) Write "1" to host_control_on_shutdown to enable host control action.
4) Initiate OS shutdown.
(Driver will perform host control SMI when it is notified that the OS
has finished shutting down.)
Host Control SMI Type
The following table shows the value to write to host_control_smi_type to
perform a power cycle or power off host control action:
PowerEdge System Host Control SMI Type
---------------- ---------------------
300 HC_SMITYPE_TYPE1
1300 HC_SMITYPE_TYPE1
1400 HC_SMITYPE_TYPE2
500SC HC_SMITYPE_TYPE2
1500SC HC_SMITYPE_TYPE2
1550 HC_SMITYPE_TYPE2
600SC HC_SMITYPE_TYPE2
1600SC HC_SMITYPE_TYPE2
650 HC_SMITYPE_TYPE2
1655MC HC_SMITYPE_TYPE2
700 HC_SMITYPE_TYPE3
750 HC_SMITYPE_TYPE3
......@@ -696,6 +696,11 @@ M: dz@debian.org
W: http://www.debian.org/~dz/i8k/
S: Maintained
DELL SYSTEMS MANAGEMENT BASE DRIVER (dcdbas)
P: Doug Warzecha
M: Douglas_Warzecha@dell.com
S: Maintained
DEVICE-MAPPER
P: Alasdair Kergon
L: dm-devel@redhat.com
......
......@@ -67,4 +67,22 @@ config DELL_RBU
supporting application to comunicate with the BIOS regarding the new
image for the image update to take effect.
See <file:Documentation/dell_rbu.txt> for more details on the driver.
config DCDBAS
tristate "Dell Systems Management Base Driver"
depends on X86 || X86_64
default m
help
The Dell Systems Management Base Driver provides a sysfs interface
for systems management software to perform System Management
Interrupts (SMIs) and Host Control Actions (system power cycle or
power off after OS shutdown) on certain Dell systems.
See <file:Documentation/dcdbas.txt> for more details on the driver
and the Dell systems on which Dell systems management software makes
use of this driver.
Say Y or M here to enable the driver for use by Dell systems
management software such as Dell OpenManage.
endmenu
......@@ -5,3 +5,4 @@ obj-$(CONFIG_EDD) += edd.o
obj-$(CONFIG_EFI_VARS) += efivars.o
obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
This diff is collapsed.
/*
* dcdbas.h: Definitions for Dell Systems Management Base driver
*
* Copyright (C) 1995-2005 Dell Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2.0 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _DCDBAS_H_
#define _DCDBAS_H_
#include <linux/device.h>
#include <linux/input.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#define MAX_SMI_DATA_BUF_SIZE (256 * 1024)
#define HC_ACTION_NONE (0)
#define HC_ACTION_HOST_CONTROL_POWEROFF BIT(1)
#define HC_ACTION_HOST_CONTROL_POWERCYCLE BIT(2)
#define HC_SMITYPE_NONE (0)
#define HC_SMITYPE_TYPE1 (1)
#define HC_SMITYPE_TYPE2 (2)
#define HC_SMITYPE_TYPE3 (3)
#define ESM_APM_CMD (0x0A0)
#define ESM_APM_POWER_CYCLE (0x10)
#define ESM_STATUS_CMD_UNSUCCESSFUL (-1)
#define CMOS_BASE_PORT (0x070)
#define CMOS_PAGE1_INDEX_PORT (0)
#define CMOS_PAGE1_DATA_PORT (1)
#define CMOS_PAGE2_INDEX_PORT_PIIX4 (2)
#define CMOS_PAGE2_DATA_PORT_PIIX4 (3)
#define PE1400_APM_CONTROL_PORT (0x0B0)
#define PCAT_APM_CONTROL_PORT (0x0B2)
#define PCAT_APM_STATUS_PORT (0x0B3)
#define PE1300_CMOS_CMD_STRUCT_PTR (0x38)
#define PE1400_CMOS_CMD_STRUCT_PTR (0x70)
#define MAX_SYSMGMT_SHORTCMD_PARMBUF_LEN (14)
#define MAX_SYSMGMT_LONGCMD_SGENTRY_NUM (16)
#define TIMEOUT_USEC_SHORT_SEMA_BLOCKING (10000)
#define EXPIRED_TIMER (0)
#define SMI_CMD_MAGIC (0x534D4931)
#define DCDBAS_DEV_ATTR_RW(_name) \
DEVICE_ATTR(_name,0600,_name##_show,_name##_store);
#define DCDBAS_DEV_ATTR_RO(_name) \
DEVICE_ATTR(_name,0400,_name##_show,NULL);
#define DCDBAS_DEV_ATTR_WO(_name) \
DEVICE_ATTR(_name,0200,NULL,_name##_store);
#define DCDBAS_BIN_ATTR_RW(_name) \
struct bin_attribute bin_attr_##_name = { \
.attr = { .name = __stringify(_name), \
.mode = 0600, \
.owner = THIS_MODULE }, \
.read = _name##_read, \
.write = _name##_write, \
}
struct smi_cmd {
__u32 magic;
__u32 ebx;
__u32 ecx;
__u16 command_address;
__u8 command_code;
__u8 reserved;
__u8 command_buffer[1];
} __attribute__ ((packed));
struct apm_cmd {
__u8 command;
__s8 status;
__u16 reserved;
union {
struct {
__u8 parm[MAX_SYSMGMT_SHORTCMD_PARMBUF_LEN];
} __attribute__ ((packed)) shortreq;
struct {
__u16 num_sg_entries;
struct {
__u32 size;
__u64 addr;
} __attribute__ ((packed))
sglist[MAX_SYSMGMT_LONGCMD_SGENTRY_NUM];
} __attribute__ ((packed)) longreq;
} __attribute__ ((packed)) parameters;
} __attribute__ ((packed));
#endif /* _DCDBAS_H_ */
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