| /* |
| * 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; |
| } |
| |
| ret = info->errno; |
| |
| 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); |
| } |