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, 164 insertions, 0 deletions

diff --git a/kernel/rpmsg/ethosu_rpmsg_capabilities.c b/kernel/rpmsg/ethosu_rpmsg_capabilities.c
new file mode 100644
index 0000000..73ce2dc
--- /dev/null
+++ b/kernel/rpmsg/ethosu_rpmsg_capabilities.c
@@ -0,0 +1,164 @@
+/*
+ * 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_capabilities.h>
+
+#include <common/ethosu_device.h>
+#include <rpmsg/ethosu_rpmsg.h>
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+
+/****************************************************************************
+ * Defines
+ ****************************************************************************/
+
+#define CAPABILITIES_RESP_TIMEOUT_MS 2000
+
+/****************************************************************************
+ * Functions
+ ****************************************************************************/
+
+static inline int ethosu_capabilities_send(struct ethosu_capabilities *cap,
+					   struct ethosu_mailbox *mailbox)
+{
+	return ethosu_mailbox_capabilities_request(mailbox,
+						   &cap->msg);
+}
+
+static void ethosu_capabilities_fail(struct ethosu_mailbox_msg *msg)
+{
+	struct ethosu_capabilities *cap =
+		container_of(msg, typeof(*cap), msg);
+
+	if (completion_done(&cap->done))
+		return;
+
+	cap->errno = -EFAULT;
+	complete(&cap->done);
+}
+
+void ethosu_capability_rsp(struct ethosu_mailbox *mailbox,
+			   int msg_id,
+			   struct ethosu_core_msg_capabilities_rsp *rsp)
+{
+	struct device *dev = mailbox->dev;
+	struct ethosu_mailbox_msg *msg;
+	struct ethosu_capabilities *cap;
+
+	msg = ethosu_mailbox_find(mailbox, msg_id,
+				  ETHOSU_CORE_MSG_CAPABILITIES_REQ);
+	if (IS_ERR(msg)) {
+		dev_warn(dev,
+			 "Id for capabilities msg not found. Id=0x%0x: %ld\n",
+			 msg_id, PTR_ERR(msg));
+
+		return;
+	}
+
+	cap = container_of(msg, typeof(*cap), msg);
+
+	if (completion_done(&cap->done))
+		return;
+
+	cap->uapi->hw_id.version_status = rsp->version_status;
+	cap->uapi->hw_id.version_minor = rsp->version_minor;
+	cap->uapi->hw_id.version_major = rsp->version_major;
+	cap->uapi->hw_id.product_major = rsp->product_major;
+	cap->uapi->hw_id.arch_patch_rev = rsp->arch_patch_rev;
+	cap->uapi->hw_id.arch_minor_rev = rsp->arch_minor_rev;
+	cap->uapi->hw_id.arch_major_rev = rsp->arch_major_rev;
+	cap->uapi->driver_patch_rev = rsp->driver_patch_rev;
+	cap->uapi->driver_minor_rev = rsp->driver_minor_rev;
+	cap->uapi->driver_major_rev = rsp->driver_major_rev;
+	cap->uapi->hw_cfg.macs_per_cc = rsp->macs_per_cc;
+	cap->uapi->hw_cfg.cmd_stream_version = rsp->cmd_stream_version;
+	cap->uapi->hw_cfg.custom_dma = rsp->custom_dma;
+
+	cap->errno = 0;
+	complete(&cap->done);
+}
+
+int ethosu_capabilities_request(struct device *dev,
+				struct ethosu_mailbox *mailbox,
+				struct ethosu_uapi_device_capabilities *uapi)
+{
+	struct ethosu_capabilities *cap;
+	int ret;
+	int timeout;
+
+	cap = devm_kzalloc(dev, sizeof(struct ethosu_capabilities),
+			   GFP_KERNEL);
+	if (!cap)
+		return -ENOMEM;
+
+	cap->dev = dev;
+	cap->uapi = uapi;
+	init_completion(&cap->done);
+	cap->msg.fail = ethosu_capabilities_fail;
+
+	ret = ethosu_mailbox_register(mailbox, &cap->msg);
+	if (ret < 0)
+		goto kfree;
+
+	dev_dbg(dev, "Capabilities create. Id=%d, handle=0x%p\n",
+		cap->msg.id, cap);
+
+	ret = ethosu_capabilities_send(cap, mailbox);
+	if (0 != ret)
+		goto deregister;
+
+	/* Unlock the mutex before going to block on the condition */
+	device_unlock(dev);
+
+	/* wait for response to arrive back */
+	timeout = wait_for_completion_timeout(&cap->done,
+					      msecs_to_jiffies(
+						      CAPABILITIES_RESP_TIMEOUT_MS));
+
+	/* take back the mutex before resuming to do anything */
+	device_lock(dev);
+
+	if (0 == timeout) {
+		dev_warn(dev, "Capabilities response timeout");
+		ret = -ETIME;
+		goto deregister;
+	}
+
+	if (cap->errno) {
+		ret = cap->errno;
+		goto deregister;
+	}
+
+deregister:
+	ethosu_mailbox_deregister(mailbox, &cap->msg);
+
+kfree:
+	dev_dbg(dev, "Capabilities destroy. Id=%d, handle=0x%p\n",
+		cap->msg.id, cap);
+	devm_kfree(dev, cap);
+
+	return ret;
+}