void ipc_connect ()
{
g_ipc_handle = esif_ipc_connect((char*)SESSION_ID);
if (g_ipc_handle != ESIF_INVALID_HANDLE) {
char *kern_str = esif_cmd_info(g_out_buf);
ESIF_TRACE_DEBUG("ESIF IPC Kernel Device Opened\n");
if (NULL != kern_str) {
ESIF_TRACE_DEBUG("%s", kern_str);
esif_ccb_sprintf(sizeof(g_esif_kernel_version), g_esif_kernel_version, "%s", kern_str);
}
}
}
// IPC Connect
eEsifError ipc_connect()
{
eEsifError rc = ESIF_OK;
int check_kernel_version = ESIF_TRUE;
ESIF_TRACE_ENTRY_INFO();
// Exit if IPC already connected
if (g_ipc_handle != ESIF_INVALID_HANDLE) {
return ESIF_OK;
}
// Connect to LF
g_ipc_handle = esif_ipc_connect((char *)SESSION_ID);
if (g_ipc_handle == ESIF_INVALID_HANDLE) {
ESIF_TRACE_WARN("ESIF LF is not available\n");
rc = ESIF_E_NO_LOWER_FRAMEWORK;
}
else {
char *outbuf = esif_ccb_malloc(OUT_BUF_LEN);
char *kern_str = (outbuf != NULL ? esif_cmd_info(outbuf) : NULL);
ESIF_TRACE_DEBUG("ESIF IPC Kernel Device Opened\n");
if (NULL != kern_str) {
// Extract just the Kernel LF Version from the result string
extract_kernel_version(kern_str, OUT_BUF_LEN);
// Bypass Kernel Version check for DEBUG builds
#if defined(ESIF_ATTR_DEBUG)
check_kernel_version = ESIF_FALSE;
#endif
// Validate Kernel LF version is compatible with UF version
if (check_kernel_version == ESIF_FALSE || esif_ccb_strcmp(kern_str, ESIF_VERSION) == 0) {
ESIF_TRACE_INFO("Kernel Version: %s\n", kern_str);
esif_ccb_sprintf(sizeof(g_esif_kernel_version), g_esif_kernel_version, "%s", kern_str);
}
else {
ESIF_TRACE_ERROR("ESIF_LF Version (%s) Incompatible with ESIF_UF Version (%s)\n", kern_str, ESIF_VERSION);
ipc_disconnect();
rc = ESIF_E_NOT_SUPPORTED;
}
}
esif_ccb_free(outbuf);
}
ESIF_TRACE_EXIT_INFO_W_STATUS(rc);
return rc;
}
