1 /* Copyright 2013-2014 IBM Corp. 2 * 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 12 * implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 /* 18 * Code for handling FSP_MCLASS_DIAG messages (cmd 0xee) 19 * Receiving a high level ack timeout is likely indicative of a firmware bug 20 */ 21 #include <skiboot.h> 22 #include <fsp.h> 23 #include <lock.h> 24 #include <processor.h> 25 #include <timebase.h> 26 #include <opal.h> 27 #include <fsp-sysparam.h> 28 29 static bool fsp_diag_msg(u32 cmd_sub_mod, struct fsp_msg *msg) 30 { 31 32 if (cmd_sub_mod == FSP_RSP_DIAG_LINK_ERROR) { 33 printf("FIXME: Unhandled FSP_MCLASS_DIAG Link Error Report\n"); 34 return false; 35 } 36 37 if (cmd_sub_mod != FSP_RSP_DIAG_ACK_TIMEOUT) { 38 printf("BUG: Unhandled subcommand: 0x%x (New FSP spec?)\n", 39 cmd_sub_mod); 40 return false; 41 } 42 43 printf("BUG: High Level ACK timeout (FSP_MCLASS_DIAG) for 0x%x\n", 44 msg->data.words[0] & 0xffff0000); 45 46 return true; 47 } 48 49 static struct fsp_client fsp_diag = { 50 .message = fsp_diag_msg, 51 }; 52 53 /* This is called at boot time */ 54 void fsp_init_diag(void) 55 { 56 /* Register for the diag event */ 57 fsp_register_client(&fsp_diag, FSP_MCLASS_DIAG); 58 } 59