Add IPMI Get-Chassis-Capabilities command

* Implement response to separately commented fields.
* Add to the whitelist.

Note: some hardcoded fields need future work.

Resolve openbmc/openbmc#438.

Change-Id: Ica9a55a14987ddc6b9984c7d3dcb143416ee7e37
Signed-off-by: Nan Li <william.bjlinan@hotmail.com>

3 files changed, 62 insertions, 1 deletions

diff --git a/chassishandler.cpp b/chassishandler.cpp
index c6753e8..0b503c7 100644
--- a/chassishandler.cpp
+++ b/chassishandler.cpp
@@ -55,6 +55,16 @@ const char *settings_object_name  =  "/org/openbmc/settings/host0";
 const char *settings_intf_name    =  "org.freedesktop.DBus.Properties";
 const char *host_intf_name        =  "org.openbmc.settings.Host";
 
+typedef struct
+{
+    uint8_t cap_flags;
+    uint8_t fru_info_dev_addr;
+    uint8_t sdr_dev_addr;
+    uint8_t sel_dev_addr;
+    uint8_t system_management_dev_addr;
+    uint8_t bridge_dev_addr;
+}__attribute__((packed)) ipmi_chassis_cap_t;
+
 int dbus_get_property(const char *name, char **buf)
 {
     sd_bus_error error = SD_BUS_ERROR_NULL;
@@ -496,6 +506,52 @@ ipmi_ret_t ipmi_chassis_wildcard(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
     return rc;
 }
 
+ipmi_ret_t ipmi_get_chassis_cap(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
+                             ipmi_request_t request, ipmi_response_t response,
+                             ipmi_data_len_t data_len, ipmi_context_t context)
+{
+    // sd_bus error
+    ipmi_ret_t rc = IPMI_CC_OK;
+
+    ipmi_chassis_cap_t chassis_cap{};
+
+    *data_len = sizeof(ipmi_chassis_cap_t);
+
+    // TODO: need future work. Get those flag from MRW.
+
+    // capabilities flags
+    // [7..4] - reserved
+    // [3] – 1b = provides power interlock  (IPM 1.5)
+    // [2] – 1b = provides Diagnostic Interrupt (FP NMI)
+    // [1] – 1b = provides “Front Panel Lockout” (indicates that the chassis has capabilities
+    //            to lock out external power control and reset button or front panel interfaces
+    //            and/or detect tampering with those interfaces).
+    // [0] -1b = Chassis provides intrusion (physical security) sensor.
+    // set to default value 0x0.
+    chassis_cap.cap_flags = 0x0;
+
+    // Since we do not have a separate SDR Device/SEL Device/ FRU repository.
+    // The 20h was given as those 5 device addresses.
+    // Chassis FRU info Device Address
+    chassis_cap.fru_info_dev_addr = 0x20;
+
+    // Chassis SDR Device Address
+    chassis_cap.sdr_dev_addr = 0x20;
+
+    // Chassis SEL Device Address
+    chassis_cap.sel_dev_addr = 0x20;
+
+    // Chassis System Management Device Address
+    chassis_cap.system_management_dev_addr = 0x20;
+
+    // Chassis Bridge Device Address.
+    chassis_cap.bridge_dev_addr = 0x20;
+
+    memcpy(response, &chassis_cap, *data_len);
+
+    return rc;
+}
+
 //------------------------------------------------------------
 // Calls into Chassis Control Dbus object to do the power off
 //------------------------------------------------------------
@@ -804,6 +860,9 @@ void register_netfn_chassis_functions()
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_WILDCARD);
     ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_WILDCARD, NULL, ipmi_chassis_wildcard);
 
+    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_GET_CHASSIS_CAP);
+    ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_GET_CHASSIS_CAP, NULL, ipmi_get_chassis_cap);
+
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_CHASSIS, IPMI_CMD_GET_SYS_BOOT_OPTIONS);
     ipmi_register_callback(NETFUN_CHASSIS, IPMI_CMD_GET_SYS_BOOT_OPTIONS, NULL, ipmi_chassis_get_sys_boot_options);
 
diff --git a/chassishandler.h b/chassishandler.h
index e47b4a1..b290f21 100644
--- a/chassishandler.h
+++ b/chassishandler.h
@@ -7,6 +7,7 @@
 // IPMI commands for Chassis net functions.
 enum ipmi_netfn_app_cmds
 {
+    IPMI_CMD_GET_CHASSIS_CAP      = 0x00,
 	// Chassis Control
 	IPMI_CMD_CHASSIS_CONTROL	  = 0x02,
     // Get capability bits
diff --git a/host-ipmid-whitelist.conf b/host-ipmid-whitelist.conf
index bd02898..dc7964e 100644
--- a/host-ipmid-whitelist.conf
+++ b/host-ipmid-whitelist.conf
@@ -1,4 +1,5 @@
-#<NetFn>:<Command>
+#<NetFn>:<Command
+0x00:0x00    //<Chassis>:<Chassis Capabiliti>
 0x00:0x02    //<Chassis>:<Chassis Control>
 0x00:0x08    //<Chassis>:<Set System Boot Options>
 0x00:0x09    //<Chassis>:<Get System Boot Options>