diff options
Diffstat (limited to 'kernel/rpmsg/ethosu_rpmsg_network_info.c')
| -rw-r--r-- | kernel/rpmsg/ethosu_rpmsg_network_info.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/kernel/rpmsg/ethosu_rpmsg_network_info.c b/kernel/rpmsg/ethosu_rpmsg_network_info.c new file mode 100644 index 0000000..0e54d87 --- /dev/null +++ b/kernel/rpmsg/ethosu_rpmsg_network_info.c @@ -0,0 +1,187 @@ +/* + * SPDX-FileCopyrightText: Copyright 2022-2024 Arm Limited and/or its affiliates <open-source-office@arm.com> + * SPDX-License-Identifier: GPL-2.0-only + * + * 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. + */ + +/**************************************************************************** + * Includes + ****************************************************************************/ + +#include <rpmsg/ethosu_rpmsg_network_info.h> + +#include <common/ethosu_device.h> +#include <rpmsg/ethosu_rpmsg_network.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); +} + +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_dbg(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_dbg(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); +} |