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authorDan Crowell <dcrowell@us.ibm.com>2018-08-30 12:19:21 -0500
committerWilliam G. Hoffa <wghoffa@us.ibm.com>2018-09-19 09:50:03 -0500
commit4e4dbf34cd08855833bce3b3f3519761a839d6db (patch)
tree499b10ff16300a90d21b7aa7615b4b252c33b72f /src/include
parent639b6728bfdb38ab07b0044fba9ea30d30ea381c (diff)
downloadtalos-hostboot-4e4dbf34cd08855833bce3b3f3519761a839d6db.tar.gz
talos-hostboot-4e4dbf34cd08855833bce3b3f3519761a839d6db.zip
Forcibly clear all previous wakeups when the PM Complex starts
The power management logic was designed with the assumption that the external callers would manage the state machine such that the order of operations is always: load->start->reset->load->start->reset->etc. However, we have discovered edge cases where a reset can happen before the first load or after a previous reset. In either case we will end up with our wakeup counter being off by one and thus never releasing wakeup. The solution is to add logic to the start path that will explicitly clear the counter out completely, regardless of its current value. This will ensure that wakeup is released once the complex is alive. Change-Id: Ifb436335090ff910b9ee0f083d9a550b81833287 CQ: SW442639 Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/65518 Reviewed-by: Matt Derksen <mderkse1@us.ibm.com> Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com> Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com> Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com> Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com> Reviewed-by: William G. Hoffa <wghoffa@us.ibm.com>
Diffstat (limited to 'src/include')
-rw-r--r--src/include/runtime/interface.h4
-rw-r--r--src/include/usr/scom/scomreasoncodes.H2
-rw-r--r--src/include/usr/scom/wakeup.H56
3 files changed, 62 insertions, 0 deletions
diff --git a/src/include/runtime/interface.h b/src/include/runtime/interface.h
index 21e596ab5..ae922d23c 100644
--- a/src/include/runtime/interface.h
+++ b/src/include/runtime/interface.h
@@ -127,9 +127,12 @@ enum HbrtRcPiberr_t
* Wakeup mode for the wakeup() interface
* HBRT_WKUP_FORCE_AWAKE: force a core awake
* HBRT_WKUP_CLEAR_FORCE: clear a previous force
+ * HBRT_WKUP_CLEAR_FORCE_COMPLETELY: clear all previous forces, regardless
+ * of internal counts
*/
#define HBRT_WKUP_FORCE_AWAKE 0
#define HBRT_WKUP_CLEAR_FORCE 1
+#define HBRT_WKUP_CLEAR_FORCE_COMPLETELY 2
/**
* Chip ID types included in the chip_id / proc_id / core_id
@@ -167,6 +170,7 @@ enum HbrtRcPiberr_t
#define HBRT_CAPS_SET1_OPAL 1
#define HBRT_CAPS_OPAL_HAS_XSCOM_RC (1ul << 0)
#define HBRT_CAPS_OPAL_HAS_WAKEUP (1ul << 1)
+#define HBRT_CAPS_OPAL_HAS_WAKEUP_CLEAR (1ul << 2)
/* PHYP fixes */
#define HBRT_CAPS_SET2_PHYP 2
diff --git a/src/include/usr/scom/scomreasoncodes.H b/src/include/usr/scom/scomreasoncodes.H
index e8d5a7e6b..5c39abdeb 100644
--- a/src/include/usr/scom/scomreasoncodes.H
+++ b/src/include/usr/scom/scomreasoncodes.H
@@ -79,6 +79,8 @@ namespace SCOM
SCOM_SENSITIVE_REG_READ_FAIL = SCOM_COMP_ID | 0x1A,
SCOM_BAD_TARGET = SCOM_COMP_ID | 0x1B,
SCOM_CACHE_SEQ_ERROR = SCOM_COMP_ID | 0x1C,
+ SCOM_INVALID_WAKEUP_PARM = SCOM_COMP_ID | 0x1D,
+ SCOM_UNEXPECTED_FORCE_WAKEUP = SCOM_COMP_ID | 0x1E,
};
enum UserDetailsTypes
diff --git a/src/include/usr/scom/wakeup.H b/src/include/usr/scom/wakeup.H
new file mode 100644
index 000000000..96e659197
--- /dev/null
+++ b/src/include/usr/scom/wakeup.H
@@ -0,0 +1,56 @@
+/* IBM_PROLOG_BEGIN_TAG */
+/* This is an automatically generated prolog. */
+/* */
+/* $Source: src/include/usr/scom/wakeup.H $ */
+/* */
+/* OpenPOWER HostBoot Project */
+/* */
+/* Contributors Listed Below - COPYRIGHT 2018 */
+/* [+] International Business Machines Corp. */
+/* */
+/* */
+/* Licensed under the Apache License, Version 2.0 (the "License"); */
+/* you may not use this file except in compliance with the License. */
+/* You may obtain a copy of the License at */
+/* */
+/* http://www.apache.org/licenses/LICENSE-2.0 */
+/* */
+/* Unless required by applicable law or agreed to in writing, software */
+/* distributed under the License is distributed on an "AS IS" BASIS, */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
+/* implied. See the License for the specific language governing */
+/* permissions and limitations under the License. */
+/* */
+/* IBM_PROLOG_END_TAG */
+/**
+ * Contains functions and constants related to handling special wakeup.
+ */
+
+namespace WAKEUP
+{
+
+/**
+ * Parameters for wakeup assert/release
+ */
+enum HandleOptions_t
+{
+ ENABLE,
+ DISABLE,
+ FORCE_DISABLE
+};
+
+/**
+ * @brief This function handles the enable and disable of the special
+ * wakeup that allows scom operations on idle cores.
+ *
+ * @param[in] i_target - EQ/EX/Core target
+ * @param[in] i_enable - set or clear or clear all of the wakeups
+ *
+ * @return errlHndl_t - error handle
+ */
+errlHndl_t handleSpecialWakeup(TARGETING::Target* i_target,
+ HandleOptions_t i_enable);
+
+
+
+}
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