Use ids for identifying messages sent to EthosU firmware

Avoid to use pointers to kernel memory as identify messages, prior this
change, if memory is reused that can lead to unexpected conflicts.

Remove ref counting from capabilities and network_info since memory is
freed in only one place.

Finally, extract the capabilities code in its own files.

Change-Id: I9ab7257f3ab85fa3347be65b3739e0daf9b5a441

1 files changed, 62 insertions, 0 deletions

diff --git a/kernel/ethosu_capabilities.h b/kernel/ethosu_capabilities.h
new file mode 100644
index 0000000..87cd168
--- /dev/null
+++ b/kernel/ethosu_capabilities.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2022 Arm Limited.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you can access it online at
+ * http://www.gnu.org/licenses/gpl-2.0.html.
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ */
+
+#ifndef ETHOSU_CAPABILITIES_H
+#define ETHOSU_CAPABILITIES_H
+
+/****************************************************************************
+ * Includes
+ ****************************************************************************/
+
+#include "ethosu_core_interface.h"
+#include "ethosu_mailbox.h"
+
+#include <linux/types.h>
+#include <linux/completion.h>
+
+/****************************************************************************
+ * Types
+ ****************************************************************************/
+
+struct ethosu_device;
+struct ethosu_uapi_device_capabilities;
+
+/**
+ * struct ethosu_capabilities - Capabilities internal struct
+ */
+struct ethosu_capabilities {
+	struct ethosu_device                   *edev;
+	struct completion                      done;
+	struct ethosu_uapi_device_capabilities *uapi;
+	struct ethosu_mailbox_msg              msg;
+	int                                    errno;
+};
+
+/****************************************************************************
+ * Functions
+ ****************************************************************************/
+
+int ethosu_capabilities_request(struct ethosu_device *edev,
+				struct ethosu_uapi_device_capabilities *uapi);
+
+void ethosu_capability_rsp(struct ethosu_device *edev,
+			   struct ethosu_core_msg_capabilities_rsp *rsp);
+
+#endif