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/*
* 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
*/
/****************************************************************************
* Includes
****************************************************************************/
#include "ethosu_network_info.h"
#include "ethosu_device.h"
#include "ethosu_network.h"
#include "ethosu_mailbox.h"
#include "uapi/ethosu.h"
#define NETWORK_INFO_RESP_TIMEOUT_MS 3000
static inline int ethosu_network_info_send(struct ethosu_network_info *info)
{
/* Send network info request to firmware */
return ethosu_mailbox_network_info_request(&info->edev->mailbox,
&info->msg,
info->net->buf,
info->net->index);
}
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);
}
static int ethosu_network_info_resend(struct ethosu_mailbox_msg *msg)
{
struct ethosu_network_info *info =
container_of(msg, typeof(*info), msg);
int ret;
/* Don't resend request if response has already been received */
if (completion_done(&info->done))
return 0;
/* Resend request */
ret = ethosu_network_info_send(info);
if (ret)
return ret;
return 0;
}
int ethosu_network_info_request(struct ethosu_network *net,
struct ethosu_uapi_network_info *uapi)
{
struct ethosu_network_info *info;
int ret;
int timeout;
info = devm_kzalloc(net->edev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->edev = net->edev;
info->net = net;
info->uapi = uapi;
init_completion(&info->done);
info->msg.fail = ethosu_network_info_fail;
info->msg.resend = ethosu_network_info_resend;
ret = ethosu_mailbox_register(&info->edev->mailbox, &info->msg);
if (ret < 0)
goto kfree;
/* Get reference to network */
ethosu_network_get(info->net);
ret = ethosu_network_info_send(info);
if (ret)
goto deregister;
dev_info(info->edev->dev, "Network info create. Id=%d, handle=0x%p\n\n",
info->msg.id, info);
/* Unlock the device mutex and wait for completion */
mutex_unlock(&info->edev->mutex);
timeout = wait_for_completion_timeout(&info->done,
msecs_to_jiffies(
NETWORK_INFO_RESP_TIMEOUT_MS));
mutex_lock(&info->edev->mutex);
if (0 == timeout) {
dev_warn(info->edev->dev, "Network info timed out.");
ret = -ETIME;
goto deregister;
}
deregister:
ethosu_mailbox_deregister(&info->edev->mailbox, &info->msg);
ethosu_network_put(info->net);
kfree:
dev_info(info->edev->dev, "Network info destroy. Id=%d, handle=0x%p\n",
info->msg.id, info);
devm_kfree(info->edev->dev, info);
return ret;
}
void ethosu_network_info_rsp(struct ethosu_device *edev,
struct ethosu_core_network_info_rsp *rsp)
{
int ret;
int id = (int)rsp->user_arg;
struct ethosu_mailbox_msg *msg;
struct ethosu_network_info *info;
uint32_t i;
msg = ethosu_mailbox_find(&edev->mailbox, id);
if (IS_ERR(msg)) {
dev_warn(edev->dev,
"Id for network info msg not found. Id=%d\n",
id);
return;
}
info = container_of(msg, typeof(*info), msg);
if (completion_done(&info->done))
return;
info->errno = 0;
if (rsp->status != ETHOSU_CORE_STATUS_OK) {
info->errno = -EBADF;
goto signal_complete;
}
if (rsp->ifm_count > ETHOSU_FD_MAX || rsp->ofm_count > ETHOSU_FD_MAX) {
info->errno = -ENFILE;
goto signal_complete;
}
ret = strscpy(info->uapi->desc, rsp->desc, sizeof(info->uapi->desc));
if (ret < 0) {
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);
}
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