| /* |
| * Copyright 2022-2023 Arm Limited and/or its affiliates |
| * |
| * 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" |
| |
| #include <linux/bug.h> |
| |
| #define NETWORK_INFO_RESP_TIMEOUT_MS 3000 |
| |
| static inline int ethosu_network_info_send(struct ethosu_network_info *info, |
| struct ethosu_mailbox *mailbox) |
| { |
| /* Send network info request to firmware */ |
| return ethosu_mailbox_network_info_request(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); |
| } |
| |
| int ethosu_network_info_request(struct device *dev, |
| struct ethosu_mailbox *mailbox, |
| struct ethosu_network *net, |
| struct ethosu_uapi_network_info *uapi) |
| { |
| struct ethosu_network_info *info; |
| int ret; |
| int timeout; |
| |
| info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| info->dev = dev; |
| info->net = net; |
| info->uapi = uapi; |
| init_completion(&info->done); |
| info->msg.fail = ethosu_network_info_fail; |
| |
| ret = ethosu_mailbox_register(mailbox, &info->msg); |
| if (ret < 0) |
| goto kfree; |
| |
| /* Get reference to network */ |
| ethosu_network_get(info->net); |
| |
| ret = ethosu_network_info_send(info, mailbox); |
| if (ret) |
| goto deregister; |
| |
| dev_info(dev, |
| "Network info create. info=0x%pK, net=0x%pK, msg.id=0x%x\n", |
| info, info->net, info->msg.id); |
| |
| /* Unlock the device mutex and wait for completion */ |
| device_unlock(dev); |
| timeout = wait_for_completion_timeout(&info->done, |
| msecs_to_jiffies( |
| NETWORK_INFO_RESP_TIMEOUT_MS)); |
| device_lock(dev); |
| |
| if (0 == timeout) { |
| dev_warn(dev, "Network info timed out. info=0x%pK", |
| info); |
| |
| ret = -ETIME; |
| goto deregister; |
| } |
| |
| ret = info->errno; |
| |
| deregister: |
| ethosu_mailbox_deregister(mailbox, &info->msg); |
| ethosu_network_put(info->net); |
| |
| kfree: |
| dev_info(dev, |
| "Network info destroy. info=0x%pK, msg.id=0x%x\n", |
| info, info->msg.id); |
| devm_kfree(dev, info); |
| |
| return ret; |
| } |
| |
| void ethosu_network_info_rsp(struct ethosu_mailbox *mailbox, |
| int msg_id, |
| struct ethosu_core_msg_network_info_rsp *rsp) |
| { |
| int ret; |
| struct device *dev = mailbox->dev; |
| struct ethosu_mailbox_msg *msg; |
| struct ethosu_network_info *info; |
| uint32_t i; |
| const size_t rsp_desc_size = sizeof(rsp->desc); |
| |
| BUILD_BUG_ON(rsp_desc_size != sizeof(info->uapi->desc)); |
| |
| msg = ethosu_mailbox_find(mailbox, msg_id, |
| ETHOSU_CORE_MSG_NETWORK_INFO_REQ); |
| if (IS_ERR(msg)) { |
| dev_warn(dev, |
| "Id for network info msg not found. Id=0x%x: %ld\n", |
| msg_id, PTR_ERR(msg)); |
| |
| return; |
| } |
| |
| info = container_of(msg, typeof(*info), msg); |
| |
| if (completion_done(&info->done)) |
| return; |
| |
| info->errno = 0; |
| |
| if (rsp->status != ETHOSU_CORE_STATUS_OK) { |
| dev_err(dev, "Failed to get information about the network\n"); |
| info->errno = -EBADF; |
| goto signal_complete; |
| } |
| |
| if (rsp->ifm_count > ETHOSU_FD_MAX || rsp->ofm_count > ETHOSU_FD_MAX) { |
| dev_err(dev, |
| "Invalid number of IFMs/OFMs in network info: IFMs=%u OFMs=%u\n", |
| rsp->ifm_count, rsp->ofm_count); |
| info->errno = -ENFILE; |
| goto signal_complete; |
| } |
| |
| if (strnlen(rsp->desc, rsp_desc_size) == rsp_desc_size) { |
| dev_err(dev, |
| "Description in network info is not null-terminated\n"); |
| info->errno = -EMSGSIZE; |
| goto signal_complete; |
| } |
| |
| ret = strscpy(info->uapi->desc, rsp->desc, sizeof(info->uapi->desc)); |
| if (ret < 0) { |
| dev_err(dev, "Failed to copy network info description\n"); |
| 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); |
| } |