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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_cancel_inference.h"
#include "ethosu_core_interface.h"
#include "ethosu_device.h"
#include "ethosu_inference.h"
#include <linux/wait.h>
/****************************************************************************
* Defines
****************************************************************************/
#define CANCEL_INFERENCE_RESP_TIMEOUT_MS 2000
/****************************************************************************
* Functions
****************************************************************************/
static void ethosu_cancel_inference_destroy(struct kref *kref)
{
struct ethosu_cancel_inference *cancellation =
container_of(kref, struct ethosu_cancel_inference, kref);
dev_info(cancellation->edev->dev,
"Cancel inference destroy. handle=0x%p\n", cancellation);
list_del(&cancellation->msg.list);
/* decrease the reference on the inference we are refering to */
ethosu_inference_put(cancellation->inf);
devm_kfree(cancellation->edev->dev, cancellation);
}
static int ethosu_cancel_inference_send(
struct ethosu_cancel_inference *cancellation)
{
return ethosu_mailbox_cancel_inference(&cancellation->edev->mailbox,
cancellation, cancellation->inf);
}
static void ethosu_cancel_inference_fail(struct ethosu_mailbox_msg *msg)
{
struct ethosu_cancel_inference *cancellation =
container_of(msg, typeof(*cancellation), msg);
if (completion_done(&cancellation->done))
return;
cancellation->errno = -EFAULT;
cancellation->uapi->status = ETHOSU_UAPI_STATUS_ERROR;
complete(&cancellation->done);
}
static int ethosu_cancel_inference_complete(struct ethosu_mailbox_msg *msg)
{
struct ethosu_cancel_inference *cancellation =
container_of(msg, typeof(*cancellation), msg);
if (completion_done(&cancellation->done))
return 0;
cancellation->errno = 0;
cancellation->uapi->status =
cancellation->inf->done &&
cancellation->inf->status != ETHOSU_UAPI_STATUS_OK ?
ETHOSU_UAPI_STATUS_OK :
ETHOSU_UAPI_STATUS_ERROR;
complete(&cancellation->done);
return 0;
}
int ethosu_cancel_inference_request(struct ethosu_inference *inf,
struct ethosu_uapi_cancel_inference_status *uapi)
{
struct ethosu_cancel_inference *cancellation;
int ret;
int timeout;
if (inf->done) {
uapi->status = ETHOSU_UAPI_STATUS_ERROR;
return 0;
}
cancellation =
devm_kzalloc(inf->edev->dev,
sizeof(struct ethosu_cancel_inference),
GFP_KERNEL);
if (!cancellation)
return -ENOMEM;
/* increase ref count on the inference we are refering to */
ethosu_inference_get(inf);
/* mark inference ABORTING to avoid resending the inference message */
inf->status = ETHOSU_CORE_STATUS_ABORTING;
cancellation->edev = inf->edev;
cancellation->inf = inf;
cancellation->uapi = uapi;
kref_init(&cancellation->kref);
init_completion(&cancellation->done);
cancellation->msg.fail = ethosu_cancel_inference_fail;
/* Never resend messages but always complete, since we have restart the
* whole firmware and marked the inference as aborted */
cancellation->msg.resend = ethosu_cancel_inference_complete;
/* Add cancel inference to pending list */
list_add(&cancellation->msg.list,
&cancellation->edev->mailbox.pending_list);
ret = ethosu_cancel_inference_send(cancellation);
if (0 != ret)
goto put_kref;
/* Unlock the mutex before going to block on the condition */
mutex_unlock(&cancellation->edev->mutex);
/* wait for response to arrive back */
timeout = wait_for_completion_timeout(&cancellation->done,
msecs_to_jiffies(
CANCEL_INFERENCE_RESP_TIMEOUT_MS));
/* take back the mutex before resuming to do anything */
ret = mutex_lock_interruptible(&cancellation->edev->mutex);
if (0 != ret)
goto put_kref;
if (0 == timeout /* timed out*/) {
dev_warn(inf->edev->dev,
"Msg: Cancel Inference response lost - timeout\n");
ret = -EIO;
goto put_kref;
}
if (cancellation->errno) {
ret = cancellation->errno;
goto put_kref;
}
/* if cancellation failed and the inference did not complete then reset
* the firmware */
if (cancellation->uapi->status == ETHOSU_UAPI_STATUS_ERROR &&
!cancellation->inf->done) {
ret = ethosu_firmware_reset(cancellation->edev);
if (ret)
goto put_kref;
}
put_kref:
kref_put(&cancellation->kref, ðosu_cancel_inference_destroy);
return ret;
}
void ethosu_cancel_inference_rsp(struct ethosu_device *edev,
struct ethosu_core_cancel_inference_rsp *rsp)
{
struct ethosu_cancel_inference *cancellation =
(struct ethosu_cancel_inference *)rsp->user_arg;
int ret;
ret = ethosu_mailbox_find(&edev->mailbox, &cancellation->msg);
if (ret) {
dev_warn(edev->dev,
"Handle not found in cancel inference list. handle=0x%p\n",
rsp);
return;
}
if (completion_done(&cancellation->done))
return;
cancellation->errno = 0;
switch (rsp->status) {
case ETHOSU_CORE_STATUS_OK:
cancellation->uapi->status = ETHOSU_UAPI_STATUS_OK;
break;
case ETHOSU_CORE_STATUS_ERROR:
cancellation->uapi->status = ETHOSU_UAPI_STATUS_ERROR;
break;
}
complete(&cancellation->done);
}
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