1 =================================== 1 ===================================
2 Dell Systems Management Base Driver 2 Dell Systems Management Base Driver
3 =================================== 3 ===================================
4 4
5 Overview 5 Overview
6 ======== 6 ========
7 7
8 The Dell Systems Management Base Driver provid 8 The Dell Systems Management Base Driver provides a sysfs interface for
9 systems management software such as Dell OpenM 9 systems management software such as Dell OpenManage to perform system
10 management interrupts and host control actions 10 management interrupts and host control actions (system power cycle or
11 power off after OS shutdown) on certain Dell s 11 power off after OS shutdown) on certain Dell systems.
12 12
13 Dell OpenManage requires this driver on the fo 13 Dell OpenManage requires this driver on the following Dell PowerEdge systems:
14 300, 1300, 1400, 400SC, 500SC, 1500SC, 1550, 6 14 300, 1300, 1400, 400SC, 500SC, 1500SC, 1550, 600SC, 1600SC, 650, 1655MC,
15 700, and 750. Other Dell software such as the 15 700, and 750. Other Dell software such as the open source libsmbios project
16 is expected to make use of this driver, and it 16 is expected to make use of this driver, and it may include the use of this
17 driver on other Dell systems. 17 driver on other Dell systems.
18 18
19 The Dell libsmbios project aims towards provid 19 The Dell libsmbios project aims towards providing access to as much BIOS
20 information as possible. See http://linux.del 20 information as possible. See http://linux.dell.com/libsmbios/main/ for
21 more information about the libsmbios project. 21 more information about the libsmbios project.
22 22
23 23
24 System Management Interrupt 24 System Management Interrupt
25 =========================== 25 ===========================
26 26
27 On some Dell systems, systems management softw 27 On some Dell systems, systems management software must access certain
28 management information via a system management 28 management information via a system management interrupt (SMI). The SMI data
29 buffer must reside in 32-bit address space, an 29 buffer must reside in 32-bit address space, and the physical address of the
30 buffer is required for the SMI. The driver ma 30 buffer is required for the SMI. The driver maintains the memory required for
31 the SMI and provides a way for the application 31 the SMI and provides a way for the application to generate the SMI.
32 The driver creates the following sysfs entries 32 The driver creates the following sysfs entries for systems management
33 software to perform these system management in 33 software to perform these system management interrupts::
34 34
35 /sys/devices/platform/dcdbas/smi_data 35 /sys/devices/platform/dcdbas/smi_data
36 /sys/devices/platform/dcdbas/smi_data_ 36 /sys/devices/platform/dcdbas/smi_data_buf_phys_addr
37 /sys/devices/platform/dcdbas/smi_data_ 37 /sys/devices/platform/dcdbas/smi_data_buf_size
38 /sys/devices/platform/dcdbas/smi_reque 38 /sys/devices/platform/dcdbas/smi_request
39 39
40 Systems management software must perform the f 40 Systems management software must perform the following steps to execute
41 a SMI using this driver: 41 a SMI using this driver:
42 42
43 1) Lock smi_data. 43 1) Lock smi_data.
44 2) Write system management command to smi_data 44 2) Write system management command to smi_data.
45 3) Write "1" to smi_request to generate a call 45 3) Write "1" to smi_request to generate a calling interface SMI or
46 "2" to generate a raw SMI. 46 "2" to generate a raw SMI.
47 4) Read system management command response fro 47 4) Read system management command response from smi_data.
48 5) Unlock smi_data. 48 5) Unlock smi_data.
49 49
50 50
51 Host Control Action 51 Host Control Action
52 =================== 52 ===================
53 53
54 Dell OpenManage supports a host control featur 54 Dell OpenManage supports a host control feature that allows the administrator
55 to perform a power cycle or power off of the s 55 to perform a power cycle or power off of the system after the OS has finished
56 shutting down. On some Dell systems, this hos 56 shutting down. On some Dell systems, this host control feature requires that
57 a driver perform a SMI after the OS has finish 57 a driver perform a SMI after the OS has finished shutting down.
58 58
59 The driver creates the following sysfs entries 59 The driver creates the following sysfs entries for systems management software
60 to schedule the driver to perform a power cycl 60 to schedule the driver to perform a power cycle or power off host control
61 action after the system has finished shutting 61 action after the system has finished shutting down:
62 62
63 /sys/devices/platform/dcdbas/host_control_acti 63 /sys/devices/platform/dcdbas/host_control_action
64 /sys/devices/platform/dcdbas/host_control_smi_ 64 /sys/devices/platform/dcdbas/host_control_smi_type
65 /sys/devices/platform/dcdbas/host_control_on_s 65 /sys/devices/platform/dcdbas/host_control_on_shutdown
66 66
67 Dell OpenManage performs the following steps t 67 Dell OpenManage performs the following steps to execute a power cycle or
68 power off host control action using this drive 68 power off host control action using this driver:
69 69
70 1) Write host control action to be performed t 70 1) Write host control action to be performed to host_control_action.
71 2) Write type of SMI that driver needs to perf 71 2) Write type of SMI that driver needs to perform to host_control_smi_type.
72 3) Write "1" to host_control_on_shutdown to en 72 3) Write "1" to host_control_on_shutdown to enable host control action.
73 4) Initiate OS shutdown. 73 4) Initiate OS shutdown.
74 (Driver will perform host control SMI when 74 (Driver will perform host control SMI when it is notified that the OS
75 has finished shutting down.) 75 has finished shutting down.)
76 76
77 77
78 Host Control SMI Type 78 Host Control SMI Type
79 ===================== 79 =====================
80 80
81 The following table shows the value to write t 81 The following table shows the value to write to host_control_smi_type to
82 perform a power cycle or power off host contro 82 perform a power cycle or power off host control action:
83 83
84 =================== ===================== 84 =================== =====================
85 PowerEdge System Host Control SMI Type 85 PowerEdge System Host Control SMI Type
86 =================== ===================== 86 =================== =====================
87 300 HC_SMITYPE_TYPE1 87 300 HC_SMITYPE_TYPE1
88 1300 HC_SMITYPE_TYPE1 88 1300 HC_SMITYPE_TYPE1
89 1400 HC_SMITYPE_TYPE2 89 1400 HC_SMITYPE_TYPE2
90 500SC HC_SMITYPE_TYPE2 90 500SC HC_SMITYPE_TYPE2
91 1500SC HC_SMITYPE_TYPE2 91 1500SC HC_SMITYPE_TYPE2
92 1550 HC_SMITYPE_TYPE2 92 1550 HC_SMITYPE_TYPE2
93 600SC HC_SMITYPE_TYPE2 93 600SC HC_SMITYPE_TYPE2
94 1600SC HC_SMITYPE_TYPE2 94 1600SC HC_SMITYPE_TYPE2
95 650 HC_SMITYPE_TYPE2 95 650 HC_SMITYPE_TYPE2
96 1655MC HC_SMITYPE_TYPE2 96 1655MC HC_SMITYPE_TYPE2
97 700 HC_SMITYPE_TYPE3 97 700 HC_SMITYPE_TYPE3
98 750 HC_SMITYPE_TYPE3 98 750 HC_SMITYPE_TYPE3
99 =================== ===================== 99 =================== =====================
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