Davide Grohmann | 7e8f508 | 2022-03-23 12:48:45 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2022 Arm Limited. |
| 3 | * |
| 4 | * This program is free software and is provided to you under the terms of the |
| 5 | * GNU General Public License version 2 as published by the Free Software |
| 6 | * Foundation, and any use by you of this program is subject to the terms |
| 7 | * of such GNU licence. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, you can access it online at |
| 16 | * http://www.gnu.org/licenses/gpl-2.0.html. |
| 17 | * |
| 18 | * SPDX-License-Identifier: GPL-2.0-only |
| 19 | */ |
| 20 | |
| 21 | /**************************************************************************** |
| 22 | * Includes |
| 23 | ****************************************************************************/ |
| 24 | |
| 25 | #include "ethosu_cancel_inference.h" |
| 26 | |
| 27 | #include "ethosu_core_interface.h" |
| 28 | #include "ethosu_device.h" |
| 29 | #include "ethosu_inference.h" |
| 30 | |
| 31 | #include <linux/wait.h> |
| 32 | |
| 33 | /**************************************************************************** |
| 34 | * Defines |
| 35 | ****************************************************************************/ |
| 36 | |
| 37 | #define CANCEL_INFERENCE_RESP_TIMEOUT_MS 2000 |
| 38 | |
| 39 | /**************************************************************************** |
| 40 | * Functions |
| 41 | ****************************************************************************/ |
| 42 | |
| 43 | static void ethosu_cancel_inference_destroy(struct kref *kref) |
| 44 | { |
| 45 | struct ethosu_cancel_inference *cancellation = |
| 46 | container_of(kref, struct ethosu_cancel_inference, kref); |
| 47 | |
| 48 | dev_info(cancellation->edev->dev, |
| 49 | "Cancel inference destroy. handle=0x%p\n", cancellation); |
| 50 | list_del(&cancellation->msg.list); |
| 51 | /* decrease the reference on the inference we are refering to */ |
| 52 | ethosu_inference_put(cancellation->inf); |
| 53 | devm_kfree(cancellation->edev->dev, cancellation); |
| 54 | } |
| 55 | |
| 56 | static int ethosu_cancel_inference_send( |
| 57 | struct ethosu_cancel_inference *cancellation) |
| 58 | { |
| 59 | return ethosu_mailbox_cancel_inference(&cancellation->edev->mailbox, |
| 60 | cancellation, cancellation->inf); |
| 61 | } |
| 62 | |
| 63 | static void ethosu_cancel_inference_fail(struct ethosu_mailbox_msg *msg) |
| 64 | { |
| 65 | struct ethosu_cancel_inference *cancellation = |
| 66 | container_of(msg, typeof(*cancellation), msg); |
| 67 | |
| 68 | if (completion_done(&cancellation->done)) |
| 69 | return; |
| 70 | |
| 71 | cancellation->errno = -EFAULT; |
| 72 | cancellation->uapi->status = ETHOSU_UAPI_STATUS_ERROR; |
| 73 | complete(&cancellation->done); |
| 74 | } |
| 75 | |
| 76 | static int ethosu_cancel_inference_complete(struct ethosu_mailbox_msg *msg) |
| 77 | { |
| 78 | struct ethosu_cancel_inference *cancellation = |
| 79 | container_of(msg, typeof(*cancellation), msg); |
| 80 | |
| 81 | if (completion_done(&cancellation->done)) |
| 82 | return 0; |
| 83 | |
| 84 | cancellation->errno = 0; |
| 85 | cancellation->uapi->status = |
| 86 | cancellation->inf->done && |
| 87 | cancellation->inf->status != ETHOSU_UAPI_STATUS_OK ? |
| 88 | ETHOSU_UAPI_STATUS_OK : |
| 89 | ETHOSU_UAPI_STATUS_ERROR; |
| 90 | complete(&cancellation->done); |
| 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | int ethosu_cancel_inference_request(struct ethosu_inference *inf, |
| 96 | struct ethosu_uapi_cancel_inference_status *uapi) |
| 97 | { |
| 98 | struct ethosu_cancel_inference *cancellation; |
| 99 | int ret; |
| 100 | int timeout; |
| 101 | |
| 102 | if (inf->done) { |
| 103 | uapi->status = ETHOSU_UAPI_STATUS_ERROR; |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | cancellation = |
| 109 | devm_kzalloc(inf->edev->dev, |
| 110 | sizeof(struct ethosu_cancel_inference), |
| 111 | GFP_KERNEL); |
| 112 | if (!cancellation) |
| 113 | return -ENOMEM; |
| 114 | |
| 115 | /* increase ref count on the inference we are refering to */ |
| 116 | ethosu_inference_get(inf); |
| 117 | /* mark inference ABORTING to avoid resending the inference message */ |
| 118 | inf->status = ETHOSU_CORE_STATUS_ABORTING; |
| 119 | |
| 120 | cancellation->edev = inf->edev; |
| 121 | cancellation->inf = inf; |
| 122 | cancellation->uapi = uapi; |
| 123 | kref_init(&cancellation->kref); |
| 124 | init_completion(&cancellation->done); |
| 125 | cancellation->msg.fail = ethosu_cancel_inference_fail; |
| 126 | |
| 127 | /* Never resend messages but always complete, since we have restart the |
| 128 | * whole firmware and marked the inference as aborted */ |
| 129 | cancellation->msg.resend = ethosu_cancel_inference_complete; |
| 130 | |
| 131 | /* Add cancel inference to pending list */ |
| 132 | list_add(&cancellation->msg.list, |
| 133 | &cancellation->edev->mailbox.pending_list); |
| 134 | |
| 135 | ret = ethosu_cancel_inference_send(cancellation); |
| 136 | if (0 != ret) |
| 137 | goto put_kref; |
| 138 | |
| 139 | /* Unlock the mutex before going to block on the condition */ |
| 140 | mutex_unlock(&cancellation->edev->mutex); |
| 141 | /* wait for response to arrive back */ |
| 142 | timeout = wait_for_completion_timeout(&cancellation->done, |
| 143 | msecs_to_jiffies( |
| 144 | CANCEL_INFERENCE_RESP_TIMEOUT_MS)); |
| 145 | /* take back the mutex before resuming to do anything */ |
| 146 | ret = mutex_lock_interruptible(&cancellation->edev->mutex); |
| 147 | if (0 != ret) |
| 148 | goto put_kref; |
| 149 | |
| 150 | if (0 == timeout /* timed out*/) { |
| 151 | dev_warn(inf->edev->dev, |
| 152 | "Msg: Cancel Inference response lost - timeout\n"); |
| 153 | ret = -EIO; |
| 154 | goto put_kref; |
| 155 | } |
| 156 | |
| 157 | if (cancellation->errno) { |
| 158 | ret = cancellation->errno; |
| 159 | goto put_kref; |
| 160 | } |
| 161 | |
Davide Grohmann | 8b1fe55 | 2022-04-07 16:58:32 +0200 | [diff] [blame] | 162 | /* if cancellation failed and the inference did not complete then reset |
| 163 | * the firmware */ |
| 164 | if (cancellation->uapi->status == ETHOSU_UAPI_STATUS_ERROR && |
| 165 | !cancellation->inf->done) { |
| 166 | ret = ethosu_firmware_reset(cancellation->edev); |
| 167 | if (ret) |
| 168 | goto put_kref; |
| 169 | } |
| 170 | |
Davide Grohmann | 7e8f508 | 2022-03-23 12:48:45 +0100 | [diff] [blame] | 171 | put_kref: |
| 172 | kref_put(&cancellation->kref, ðosu_cancel_inference_destroy); |
| 173 | |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | void ethosu_cancel_inference_rsp(struct ethosu_device *edev, |
| 178 | struct ethosu_core_cancel_inference_rsp *rsp) |
| 179 | { |
| 180 | struct ethosu_cancel_inference *cancellation = |
| 181 | (struct ethosu_cancel_inference *)rsp->user_arg; |
| 182 | int ret; |
| 183 | |
| 184 | ret = ethosu_mailbox_find(&edev->mailbox, &cancellation->msg); |
| 185 | if (ret) { |
| 186 | dev_warn(edev->dev, |
| 187 | "Handle not found in cancel inference list. handle=0x%p\n", |
| 188 | rsp); |
| 189 | |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | if (completion_done(&cancellation->done)) |
| 194 | return; |
| 195 | |
| 196 | cancellation->errno = 0; |
| 197 | switch (rsp->status) { |
| 198 | case ETHOSU_CORE_STATUS_OK: |
| 199 | cancellation->uapi->status = ETHOSU_UAPI_STATUS_OK; |
| 200 | break; |
| 201 | case ETHOSU_CORE_STATUS_ERROR: |
| 202 | cancellation->uapi->status = ETHOSU_UAPI_STATUS_ERROR; |
| 203 | break; |
| 204 | } |
| 205 | |
| 206 | complete(&cancellation->done); |
| 207 | } |