diff options
Diffstat (limited to 'kernel/ethosu_network_info.c')
| -rw-r--r-- | kernel/ethosu_network_info.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/kernel/ethosu_network_info.c b/kernel/ethosu_network_info.c new file mode 100644 index 0000000..2b1f841 --- /dev/null +++ b/kernel/ethosu_network_info.c @@ -0,0 +1,179 @@ +/* + * 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" + +/**************************************************************************** + * Functions + ****************************************************************************/ + +static void ethosu_network_info_destroy(struct kref *kref) +{ + struct ethosu_network_info *info = + container_of(kref, struct ethosu_network_info, kref); + + dev_info(info->edev->dev, "Network info destroy. handle=0x%pK\n", info); + + list_del(&info->list); + + ethosu_network_put(info->net); + + devm_kfree(info->edev->dev, info); +} + +struct ethosu_network_info *ethosu_network_info_create( + struct ethosu_device *edev, + struct ethosu_network *net, + struct ethosu_uapi_network_info *uapi) +{ + struct ethosu_network_info *info; + int ret; + + info = devm_kzalloc(edev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return ERR_PTR(-ENOMEM); + + info->edev = edev; + info->net = net; + info->uapi = uapi; + kref_init(&info->kref); + init_completion(&info->done); + + /* Insert network info to network info list */ + list_add(&info->list, &edev->network_info_list); + + /* Get reference to network */ + ethosu_network_get(net); + + /* Send network info request to firmware */ + ret = ethosu_mailbox_network_info_request(&info->edev->mailbox, + info, + info->net->buf, + info->net->index); + if (ret) + goto put_info; + + /* Increase reference count for the pending network info response */ + ethosu_network_info_get(info); + + dev_info(edev->dev, "Network info create. handle=%p\n", info); + + return info; + +put_info: + ethosu_network_info_put(info); + + return ERR_PTR(ret); +} + +static int ethosu_network_info_find(struct ethosu_network_info *info, + struct list_head *network_info_list) +{ + struct ethosu_network_info *cur; + + list_for_each_entry(cur, network_info_list, list) { + if (cur == info) + return 0; + } + + return -EINVAL; +} + +void ethosu_network_info_get(struct ethosu_network_info *info) +{ + kref_get(&info->kref); +} + +void ethosu_network_info_put(struct ethosu_network_info *info) +{ + kref_put(&info->kref, ethosu_network_info_destroy); +} + +int ethosu_network_info_wait(struct ethosu_network_info *info, + int timeout_ms) +{ + int timeout; + + timeout = wait_for_completion_timeout(&info->done, + msecs_to_jiffies(timeout_ms)); + + if (!timeout) { + dev_warn(info->edev->dev, + "Network info timed out."); + + return -ETIME; + } + + return info->errno; +} + +void ethosu_network_info_rsp(struct ethosu_device *edev, + struct ethosu_core_network_info_rsp *rsp) +{ + struct ethosu_network_info *info = + (struct ethosu_network_info *)rsp->user_arg; + uint32_t i; + int ret; + + ret = ethosu_network_info_find(info, &edev->network_info_list); + if (0 != ret) { + dev_warn(edev->dev, + "Handle not found in network info list. handle=0x%p\n", + info); + + 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; + } + + strncpy(info->uapi->desc, rsp->desc, sizeof(info->uapi->desc)); + + 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); + + ethosu_network_info_put(info); +} |