| /* |
| * 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 int ethosu_cancel_inference_send( |
| struct ethosu_cancel_inference *cancellation) |
| { |
| return ethosu_mailbox_cancel_inference(&cancellation->edev->mailbox, |
| &cancellation->msg, |
| cancellation->inf->msg.id); |
| } |
| |
| 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; |
| 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; |
| |
| ret = ethosu_mailbox_register(&cancellation->edev->mailbox, |
| &cancellation->msg); |
| if (ret < 0) |
| goto kfree; |
| |
| dev_info(cancellation->edev->dev, |
| "Inference cancellation create. cancel=0x%pK, msg.id=%d\n", |
| cancellation, cancellation->msg.id); |
| |
| ret = ethosu_cancel_inference_send(cancellation); |
| if (0 != ret) |
| goto deregister; |
| |
| /* 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 deregister; |
| |
| if (0 == timeout /* timed out*/) { |
| dev_warn(inf->edev->dev, |
| "Msg: Cancel Inference response lost - timeout\n"); |
| ret = -EIO; |
| goto deregister; |
| } |
| |
| if (cancellation->errno) { |
| ret = cancellation->errno; |
| goto deregister; |
| } |
| |
| /* 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 deregister; |
| } |
| |
| deregister: |
| ethosu_mailbox_deregister(&cancellation->edev->mailbox, |
| &cancellation->msg); |
| |
| kfree: |
| dev_info(cancellation->edev->dev, |
| "Cancel inference destroy. cancel=0x%pK\n", cancellation); |
| /* decrease the reference on the inference we are refering to */ |
| ethosu_inference_put(cancellation->inf); |
| devm_kfree(cancellation->edev->dev, cancellation); |
| |
| return ret; |
| } |
| |
| void ethosu_cancel_inference_rsp(struct ethosu_device *edev, |
| struct ethosu_core_cancel_inference_rsp *rsp) |
| { |
| int id = (int)rsp->user_arg; |
| struct ethosu_mailbox_msg *msg; |
| struct ethosu_cancel_inference *cancellation; |
| |
| msg = ethosu_mailbox_find(&edev->mailbox, id); |
| if (IS_ERR(msg)) { |
| dev_warn(edev->dev, |
| "Handle not found in cancel inference list. handle=0x%p\n", |
| rsp); |
| |
| return; |
| } |
| |
| cancellation = container_of(msg, typeof(*cancellation), msg); |
| |
| 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); |
| } |