Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 138 insertions, 0 deletions

diff --git a/roms/skiboot/core/ipmi-opal.c b/roms/skiboot/core/ipmi-opal.c
new file mode 100644
index 000000000..cc45b409b
--- /dev/null
+++ b/roms/skiboot/core/ipmi-opal.c
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+/*
+ * IPMI OPAL calls
+ *
+ * Copyright 2013-2018 IBM Corp.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <ipmi.h>
+#include <lock.h>
+#include <opal.h>
+#include <device.h>
+#include <ccan/list/list.h>
+
+static struct lock msgq_lock = LOCK_UNLOCKED;
+static struct list_head msgq = LIST_HEAD_INIT(msgq);
+
+static void opal_send_complete(struct ipmi_msg *msg)
+{
+	lock(&msgq_lock);
+	list_add_tail(&msgq, &msg->link);
+	opal_update_pending_evt(ipmi_backend->opal_event_ipmi_recv,
+				ipmi_backend->opal_event_ipmi_recv);
+	unlock(&msgq_lock);
+}
+
+static int64_t opal_ipmi_send(uint64_t interface,
+			      struct opal_ipmi_msg *opal_ipmi_msg, uint64_t msg_len)
+{
+	struct ipmi_msg *msg;
+
+	if (opal_ipmi_msg->version != OPAL_IPMI_MSG_FORMAT_VERSION_1) {
+		prerror("OPAL IPMI: Incorrect version\n");
+		return OPAL_UNSUPPORTED;
+	}
+
+	msg_len -= sizeof(struct opal_ipmi_msg);
+	if (msg_len > IPMI_MAX_REQ_SIZE) {
+		prerror("OPAL IPMI: Invalid request length\n");
+		return OPAL_PARAMETER;
+	}
+
+	prlog(PR_TRACE, "opal_ipmi_send(cmd: 0x%02x netfn: 0x%02x len: 0x%02llx)\n",
+	       opal_ipmi_msg->cmd, opal_ipmi_msg->netfn >> 2, msg_len);
+
+	msg = ipmi_mkmsg(interface,
+			 IPMI_CODE(opal_ipmi_msg->netfn >> 2, opal_ipmi_msg->cmd),
+			 opal_send_complete, NULL, opal_ipmi_msg->data,
+			 msg_len, IPMI_MAX_RESP_SIZE);
+	if (!msg)
+		return OPAL_RESOURCE;
+
+	msg->complete = opal_send_complete;
+	msg->error = opal_send_complete;
+	return ipmi_queue_msg(msg);
+}
+
+static int64_t opal_ipmi_recv(uint64_t interface,
+			      struct opal_ipmi_msg *opal_ipmi_msg, __be64 *msg_len)
+{
+	struct ipmi_msg *msg;
+	int64_t rc;
+
+	lock(&msgq_lock);
+	msg = list_top(&msgq, struct ipmi_msg, link);
+
+	if (!msg) {
+		rc = OPAL_EMPTY;
+		goto out_unlock;
+	}
+
+	if (opal_ipmi_msg->version != OPAL_IPMI_MSG_FORMAT_VERSION_1) {
+		prerror("OPAL IPMI: Incorrect version\n");
+		rc = OPAL_UNSUPPORTED;
+		goto out_del_msg;
+	}
+
+	if (interface != IPMI_DEFAULT_INTERFACE) {
+		prerror("IPMI: Invalid interface 0x%llx in opal_ipmi_recv\n", interface);
+		rc = OPAL_PARAMETER;
+		goto out_del_msg;
+	}
+
+	if (be64_to_cpu(*msg_len) - sizeof(struct opal_ipmi_msg) < msg->resp_size + 1) {
+		rc = OPAL_RESOURCE;
+		goto out_del_msg;
+	}
+
+	list_del(&msg->link);
+	if (list_empty(&msgq))
+		opal_update_pending_evt(ipmi_backend->opal_event_ipmi_recv, 0);
+	unlock(&msgq_lock);
+
+	opal_ipmi_msg->cmd = msg->cmd;
+	opal_ipmi_msg->netfn = msg->netfn;
+	opal_ipmi_msg->data[0] = msg->cc;
+	memcpy(&opal_ipmi_msg->data[1], msg->data, msg->resp_size);
+
+	prlog(PR_TRACE, "opal_ipmi_recv(cmd: 0x%02x netfn: 0x%02x resp_size: 0x%02x)\n",
+	      msg->cmd, msg->netfn >> 2, msg->resp_size);
+
+	/* Add one as the completion code is returned in the message data */
+	*msg_len = cpu_to_be64(msg->resp_size + sizeof(struct opal_ipmi_msg) + 1);
+	ipmi_free_msg(msg);
+
+	return OPAL_SUCCESS;
+
+out_del_msg:
+	list_del(&msg->link);
+	if (list_empty(&msgq))
+		opal_update_pending_evt(ipmi_backend->opal_event_ipmi_recv, 0);
+	ipmi_free_msg(msg);
+out_unlock:
+	unlock(&msgq_lock);
+	return rc;
+}
+
+void ipmi_opal_init(void)
+{
+	struct dt_node *opal_ipmi, *opal_event = NULL;
+
+	opal_ipmi = dt_new(opal_node, "ipmi");
+	dt_add_property_strings(opal_ipmi, "compatible", "ibm,opal-ipmi");
+	dt_add_property_cells(opal_ipmi, "ibm,ipmi-interface-id",
+			      IPMI_DEFAULT_INTERFACE);
+	dt_add_property_cells(opal_ipmi, "interrupts",
+			      ilog2(ipmi_backend->opal_event_ipmi_recv));
+
+        if (proc_gen >= proc_gen_p9)
+		opal_event = dt_find_by_name(opal_node, "event");
+	if (opal_event)
+		dt_add_property_cells(opal_ipmi, "interrupt-parent",
+				      opal_event->phandle);
+
+	opal_register(OPAL_IPMI_SEND, opal_ipmi_send, 3);
+	opal_register(OPAL_IPMI_RECV, opal_ipmi_recv, 3);
+}