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/*
* 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_rpmsg_capabilities_send(
struct ethosu_rpmsg_capabilities *cap,
struct ethosu_rpmsg_mailbox *mailbox)
{
return ethosu_rpmsg_mailbox_capabilities_request(mailbox,
&cap->msg);
}
static void ethosu_rpmsg_capabilities_fail(struct ethosu_rpmsg_mailbox_msg *msg)
{
struct ethosu_rpmsg_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_rpmsg_mailbox *mailbox,
int msg_id,
struct ethosu_rpmsg_capabilities_rsp *rsp)
{
struct device *dev = mailbox->dev;
struct ethosu_rpmsg_mailbox_msg *msg;
struct ethosu_rpmsg_capabilities *cap;
msg = ethosu_rpmsg_mailbox_find(mailbox, msg_id,
ETHOSU_RPMSG_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->uapi->hw_cfg.type = ETHOSU_DEV_SUBSYSTEM;
cap->errno = 0;
complete(&cap->done);
}
int ethosu_rpmsg_capabilities_request(struct device *dev,
struct ethosu_rpmsg_mailbox *mailbox,
struct ethosu_uapi_device_capabilities *uapi)
{
struct ethosu_rpmsg_capabilities *cap;
int ret;
int timeout;
cap = devm_kzalloc(dev, sizeof(struct ethosu_rpmsg_capabilities),
GFP_KERNEL);
if (!cap)
return -ENOMEM;
cap->dev = dev;
cap->uapi = uapi;
init_completion(&cap->done);
cap->msg.fail = ethosu_rpmsg_capabilities_fail;
ret = ethosu_rpmsg_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_rpmsg_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_rpmsg_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;
}
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