occ/hbrt: Call stopOCC() for implementing reset OCC command from FSP

OPAL is expected to leave OCC stopped after receiving reset OCC
message from FSP.  FSP will send this either at boot before
a load/start, or during runtime before load/start. If there
is no subsequent load/start command, the OCC can be left stopped.

After few attempts (runtime reset), FSP can just send reset and
expect OPAL to leave OCC in stopped state.

Call HBRT to stop OCC on FSP reset OCC command and acknowledge.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/core/hostservices.c b/core/hostservices.c
index 85e62e3..0cd4b6a 100644
--- a/core/hostservices.c
+++ b/core/hostservices.c
@@ -758,6 +758,35 @@ int host_services_occ_start(void)
 	return rc;
 }
 
+int host_services_occ_stop(void)
+{
+	struct proc_chip *chip;
+	int i, rc = 0, nr_chips=0;
+	uint64_t chipids[MAX_CHIPS];
+
+	prlog(PR_INFO, "HBRT: OCC Stop requested\n");
+
+	if (!(hservice_runtime && hservice_runtime->stopOCCs)) {
+		prerror("HBRT: No hservice_runtime->stopOCCs\n");
+		return -ENOENT;
+	}
+
+	for_each_chip(chip) {
+		chipids[nr_chips++] = chip->id;
+	}
+
+	for (i = 0; i < nr_chips; i++)
+		prlog(PR_TRACE, "HBRT: Calling stopOCC() for %04llx ",
+		      chipids[i]);
+
+	/* Lets STOP all OCC */
+	rc = hservice_runtime->stopOCCs(chipids, nr_chips);
+	hservice_mark();
+	prlog(PR_DEBUG, "HBRT: stopOCCs() rc  = %d\n", rc);
+	return rc;
+}
+
+
 void host_services_occ_base_setup(void)
 {
 	struct proc_chip *chip;