Create library for System Interface Commands.

There are IPMI commands like Read Event Message Buffer, Set BMC Global
Enables and Get Message Flags which is to be executed from host
interface only. So creating a separate library for these commands which
would be used only by phosphor-host-ipmid.

Change-Id: I14cb4019b9ab19c84e463e5a7820010f57f1c5eb
Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/systemintfcmds.cpp b/systemintfcmds.cpp
new file mode 100644
index 0000000..d920f95
--- /dev/null
+++ b/systemintfcmds.cpp
@@ -0,0 +1,109 @@
+#include "systemintfcmds.h"
+#include "host-ipmid/ipmid-api.h"
+
+#include <stdio.h>
+
+void register_netfn_app_functions() __attribute__((constructor));
+
+//-------------------------------------------------------------------
+// Called by Host post response from Get_Message_Flags
+//-------------------------------------------------------------------
+ipmi_ret_t ipmi_app_read_event(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)
+{
+    ipmi_ret_t rc = IPMI_CC_OK;
+    printf("IPMI APP READ EVENT command received\n");
+
+    // TODO : For now, this is catering only to the Soft Power Off via OEM SEL
+    //        mechanism. If we need to make this generically used for some
+    //        other conditions, then we can take advantage of context pointer.
+
+    struct oem_sel_timestamped soft_off = {0};
+    *data_len = sizeof(struct oem_sel_timestamped);
+
+    // either id[0] -or- id[1] can be filled in. We will use id[0]
+    soft_off.id[0]   = SEL_OEM_ID_0;
+    soft_off.id[1]   = SEL_OEM_ID_0;
+    soft_off.type    = SEL_RECORD_TYPE_OEM;
+
+    // Following 3 bytes are from IANA Manufactre_Id field. See below
+    soft_off.manuf_id[0]= 0x41;
+    soft_off.manuf_id[1]= 0xA7;
+    soft_off.manuf_id[2]= 0x00;
+
+    // per IPMI spec NetFuntion for OEM
+    soft_off.netfun  = 0x3A;
+
+    // Mechanism to kick start soft shutdown.
+    soft_off.cmd     = CMD_POWER;
+    soft_off.data[0] = SOFT_OFF;
+
+    // All '0xFF' since unused.
+    memset(&soft_off.data[1], 0xFF, 3);
+
+    // Pack the actual response
+    memcpy(response, &soft_off, *data_len);
+    return rc;
+}
+
+//---------------------------------------------------------------------
+// Called by Host on seeing a SMS_ATN bit set. Return a hardcoded
+// value of 0x2 indicating we need Host read some data.
+//-------------------------------------------------------------------
+ipmi_ret_t ipmi_app_get_msg_flags(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)
+{
+    // Generic return from IPMI commands.
+    ipmi_ret_t rc = IPMI_CC_OK;
+
+    printf("IPMI APP GET MSG FLAGS returning with [bit:2] set\n");
+
+    // From IPMI spec V2.0 for Get Message Flags Command :
+    // bit:[1] from LSB : 1b = Event Message Buffer Full.
+    // Return as 0 if Event Message Buffer is not supported,
+    // or when the Event Message buffer is disabled.
+    // TODO. For now. assume its not disabled and send "0x2" anyway:
+
+    uint8_t set_event_msg_buffer_full = 0x2;
+    *data_len = sizeof(set_event_msg_buffer_full);
+
+    // Pack the actual response
+    memcpy(response, &set_event_msg_buffer_full, *data_len);
+
+    return rc;
+}
+
+ipmi_ret_t ipmi_app_set_bmc_global_enables(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)
+{
+    ipmi_ret_t rc = IPMI_CC_OK;
+    *data_len = 0;
+
+    // Event and message logging enabled by default so return for now
+    printf("IPMI APP SET BMC GLOBAL ENABLES Ignoring for now\n");
+
+    return rc;
+}
+
+void register_netfn_app_functions()
+{
+
+    // <Read Event Message Buffer>
+    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_APP, IPMI_CMD_READ_EVENT);
+    ipmi_register_callback(NETFUN_APP, IPMI_CMD_READ_EVENT, NULL, ipmi_app_read_event);
+
+    // <Set BMC Global Enables>
+    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_APP,
+                                            IPMI_CMD_SET_BMC_GLOBAL_ENABLES);
+    ipmi_register_callback(NETFUN_APP, IPMI_CMD_SET_BMC_GLOBAL_ENABLES, NULL,
+                           ipmi_app_set_bmc_global_enables);
+
+    // <Get Message Flags>
+    printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_APP, IPMI_CMD_GET_MSG_FLAGS);
+    ipmi_register_callback(NETFUN_APP, IPMI_CMD_GET_MSG_FLAGS, NULL, ipmi_app_get_msg_flags);
+
+    return;
+}