Restructure kernel driver source tree

As a first step to have a clearer separation of the different parts of
the kernel driver, the source files have been placed into separate
directories according to their purpose and the different parts are only
allowed to use headers from another part in the include folder.

Files have been renamed accordingly to namespace them by their purpose.

Change-Id: I75e09ebf0002c99a22b6d4b09d34504d186c32b3
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>

1 files changed, 187 insertions, 0 deletions

diff --git a/kernel/rpmsg/ethosu_rpmsg_network_info.c b/kernel/rpmsg/ethosu_rpmsg_network_info.c
new file mode 100644
index 0000000..0e54d87
--- /dev/null
+++ b/kernel/rpmsg/ethosu_rpmsg_network_info.c
@@ -0,0 +1,187 @@
+/*
+ * SPDX-FileCopyrightText: Copyright 2022-2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ * 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.
+ */
+
+/****************************************************************************
+ * Includes
+ ****************************************************************************/
+
+#include <rpmsg/ethosu_rpmsg_network_info.h>
+
+#include <common/ethosu_device.h>
+#include <rpmsg/ethosu_rpmsg_network.h>
+#include <uapi/ethosu.h>
+
+#include <linux/bug.h>
+
+#define NETWORK_INFO_RESP_TIMEOUT_MS 3000
+
+static inline int ethosu_network_info_send(struct ethosu_network_info *info,
+					   struct ethosu_mailbox *mailbox)
+{
+	/* Send network info request to firmware */
+	return ethosu_mailbox_network_info_request(mailbox,
+						   &info->msg,
+						   info->net);
+}
+
+static void ethosu_network_info_fail(struct ethosu_mailbox_msg *msg)
+{
+	struct ethosu_network_info *info =
+		container_of(msg, typeof(*info), msg);
+
+	if (completion_done(&info->done))
+		return;
+
+	info->errno = -EFAULT;
+	complete(&info->done);
+}
+
+int ethosu_network_info_request(struct device *dev,
+				struct ethosu_mailbox *mailbox,
+				struct ethosu_network *net,
+				struct ethosu_uapi_network_info *uapi)
+{
+	struct ethosu_network_info *info;
+	int ret;
+	int timeout;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->dev = dev;
+	info->net = net;
+	info->uapi = uapi;
+	init_completion(&info->done);
+	info->msg.fail = ethosu_network_info_fail;
+
+	ret = ethosu_mailbox_register(mailbox, &info->msg);
+	if (ret < 0)
+		goto kfree;
+
+	/* Get reference to network */
+	ethosu_network_get(info->net);
+
+	ret = ethosu_network_info_send(info, mailbox);
+	if (ret)
+		goto deregister;
+
+	dev_dbg(dev,
+		"Network info create. info=0x%pK, net=0x%pK, msg.id=0x%x\n",
+		info, info->net, info->msg.id);
+
+	/* Unlock the device mutex and wait for completion */
+	device_unlock(dev);
+	timeout = wait_for_completion_timeout(&info->done,
+					      msecs_to_jiffies(
+						      NETWORK_INFO_RESP_TIMEOUT_MS));
+	device_lock(dev);
+
+	if (0 == timeout) {
+		dev_warn(dev, "Network info timed out. info=0x%pK",
+			 info);
+
+		ret = -ETIME;
+		goto deregister;
+	}
+
+	ret = info->errno;
+
+deregister:
+	ethosu_mailbox_deregister(mailbox, &info->msg);
+	ethosu_network_put(info->net);
+
+kfree:
+	dev_dbg(dev,
+		"Network info destroy. info=0x%pK, msg.id=0x%x\n",
+		info, info->msg.id);
+	devm_kfree(dev, info);
+
+	return ret;
+}
+
+void ethosu_network_info_rsp(struct ethosu_mailbox *mailbox,
+			     int msg_id,
+			     struct ethosu_core_msg_network_info_rsp *rsp)
+{
+	int ret;
+	struct device *dev = mailbox->dev;
+	struct ethosu_mailbox_msg *msg;
+	struct ethosu_network_info *info;
+	uint32_t i;
+	const size_t rsp_desc_size = sizeof(rsp->desc);
+
+	BUILD_BUG_ON(rsp_desc_size != sizeof(info->uapi->desc));
+
+	msg = ethosu_mailbox_find(mailbox, msg_id,
+				  ETHOSU_CORE_MSG_NETWORK_INFO_REQ);
+	if (IS_ERR(msg)) {
+		dev_warn(dev,
+			 "Id for network info msg not found. Id=0x%x: %ld\n",
+			 msg_id, PTR_ERR(msg));
+
+		return;
+	}
+
+	info = container_of(msg, typeof(*info), msg);
+
+	if (completion_done(&info->done))
+		return;
+
+	info->errno = 0;
+
+	if (rsp->status != ETHOSU_CORE_STATUS_OK) {
+		dev_err(dev, "Failed to get information about the network\n");
+		info->errno = -EBADF;
+		goto signal_complete;
+	}
+
+	if (rsp->ifm_count > ETHOSU_FD_MAX || rsp->ofm_count > ETHOSU_FD_MAX) {
+		dev_err(dev,
+			"Invalid number of IFMs/OFMs in network info: IFMs=%u OFMs=%u\n",
+			rsp->ifm_count, rsp->ofm_count);
+		info->errno = -ENFILE;
+		goto signal_complete;
+	}
+
+	if (strnlen(rsp->desc, rsp_desc_size) == rsp_desc_size) {
+		dev_err(dev,
+			"Description in network info is not null-terminated\n");
+		info->errno = -EMSGSIZE;
+		goto signal_complete;
+	}
+
+	ret = strscpy(info->uapi->desc, rsp->desc, sizeof(info->uapi->desc));
+	if (ret < 0) {
+		dev_err(dev, "Failed to copy network info description\n");
+		info->errno = ret;
+		goto signal_complete;
+	}
+
+	info->uapi->ifm_count = rsp->ifm_count;
+	for (i = 0; i < rsp->ifm_count; i++)
+		info->uapi->ifm_size[i] = rsp->ifm_size[i];
+
+	info->uapi->ofm_count = rsp->ofm_count;
+	for (i = 0; i < rsp->ofm_count; i++)
+		info->uapi->ofm_size[i] = rsp->ofm_size[i];
+
+signal_complete:
+	complete(&info->done);
+}