| /* |
| * 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_capabilities.h" |
| |
| #include "ethosu_core_rpmsg.h" |
| #include "ethosu_device.h" |
| |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/errno.h> |
| |
| /**************************************************************************** |
| * Defines |
| ****************************************************************************/ |
| |
| #define CAPABILITIES_RESP_TIMEOUT_MS 2000 |
| |
| /**************************************************************************** |
| * Functions |
| ****************************************************************************/ |
| |
| static inline int ethosu_capabilities_send(struct ethosu_capabilities *cap, |
| struct ethosu_mailbox *mailbox) |
| { |
| return ethosu_mailbox_capabilities_request(mailbox, |
| &cap->msg); |
| } |
| |
| static void ethosu_capabilities_fail(struct ethosu_mailbox_msg *msg) |
| { |
| struct ethosu_capabilities *cap = |
| container_of(msg, typeof(*cap), msg); |
| |
| if (completion_done(&cap->done)) |
| return; |
| |
| cap->errno = -EFAULT; |
| complete(&cap->done); |
| } |
| |
| void ethosu_capability_rsp(struct ethosu_mailbox *mailbox, |
| int msg_id, |
| struct ethosu_core_msg_capabilities_rsp *rsp) |
| { |
| struct device *dev = mailbox->dev; |
| struct ethosu_mailbox_msg *msg; |
| struct ethosu_capabilities *cap; |
| |
| msg = ethosu_mailbox_find(mailbox, msg_id); |
| if (IS_ERR(msg)) { |
| dev_warn(dev, |
| "Id for capabilities msg not found. id=%d\n", |
| msg_id); |
| |
| return; |
| } |
| |
| cap = container_of(msg, typeof(*cap), msg); |
| |
| if (completion_done(&cap->done)) |
| return; |
| |
| cap->uapi->hw_id.version_status = rsp->version_status; |
| cap->uapi->hw_id.version_minor = rsp->version_minor; |
| cap->uapi->hw_id.version_major = rsp->version_major; |
| cap->uapi->hw_id.product_major = rsp->product_major; |
| cap->uapi->hw_id.arch_patch_rev = rsp->arch_patch_rev; |
| cap->uapi->hw_id.arch_minor_rev = rsp->arch_minor_rev; |
| cap->uapi->hw_id.arch_major_rev = rsp->arch_major_rev; |
| cap->uapi->driver_patch_rev = rsp->driver_patch_rev; |
| cap->uapi->driver_minor_rev = rsp->driver_minor_rev; |
| cap->uapi->driver_major_rev = rsp->driver_major_rev; |
| cap->uapi->hw_cfg.macs_per_cc = rsp->macs_per_cc; |
| cap->uapi->hw_cfg.cmd_stream_version = rsp->cmd_stream_version; |
| cap->uapi->hw_cfg.custom_dma = rsp->custom_dma; |
| |
| cap->errno = 0; |
| complete(&cap->done); |
| } |
| |
| int ethosu_capabilities_request(struct device *dev, |
| struct ethosu_mailbox *mailbox, |
| struct ethosu_uapi_device_capabilities *uapi) |
| { |
| struct ethosu_capabilities *cap; |
| int ret; |
| int timeout; |
| |
| cap = devm_kzalloc(dev, sizeof(struct ethosu_capabilities), |
| GFP_KERNEL); |
| if (!cap) |
| return -ENOMEM; |
| |
| cap->dev = dev; |
| cap->uapi = uapi; |
| init_completion(&cap->done); |
| cap->msg.fail = ethosu_capabilities_fail; |
| |
| ret = ethosu_mailbox_register(mailbox, &cap->msg); |
| if (ret < 0) |
| goto kfree; |
| |
| dev_info(dev, "Capabilities create. Id=%d, handle=0x%p\n", |
| cap->msg.id, cap); |
| |
| ret = ethosu_capabilities_send(cap, mailbox); |
| if (0 != ret) |
| goto deregister; |
| |
| /* Unlock the mutex before going to block on the condition */ |
| device_unlock(dev); |
| |
| /* wait for response to arrive back */ |
| timeout = wait_for_completion_timeout(&cap->done, |
| msecs_to_jiffies( |
| CAPABILITIES_RESP_TIMEOUT_MS)); |
| |
| /* take back the mutex before resuming to do anything */ |
| device_lock(dev); |
| |
| if (0 == timeout) { |
| dev_warn(dev, "Capabilities response timeout"); |
| ret = -ETIME; |
| goto deregister; |
| } |
| |
| if (cap->errno) { |
| ret = cap->errno; |
| goto deregister; |
| } |
| |
| deregister: |
| ethosu_mailbox_deregister(mailbox, &cap->msg); |
| |
| kfree: |
| dev_info(dev, "Capabilities destroy. Id=%d, handle=0x%p\n", |
| cap->msg.id, cap); |
| devm_kfree(dev, cap); |
| |
| return ret; |
| } |