diff options
Diffstat (limited to 'kernel/ethosu_device.c')
| -rw-r--r-- | kernel/ethosu_device.c | 560 |
1 files changed, 0 insertions, 560 deletions
diff --git a/kernel/ethosu_device.c b/kernel/ethosu_device.c deleted file mode 100644 index 32fb012..0000000 --- a/kernel/ethosu_device.c +++ /dev/null @@ -1,560 +0,0 @@ -/* - * SPDX-FileCopyrightText: Copyright 2020-2023 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 "ethosu_device.h" - -#include "ethosu_buffer.h" -#include "ethosu_core_rpmsg.h" -#include "ethosu_capabilities.h" -#include "ethosu_inference.h" -#include "ethosu_cancel_inference.h" -#include "ethosu_network.h" -#include "ethosu_network_info.h" -#include "ethosu_version.h" -#include "uapi/ethosu.h" - -#include <linux/dma-mapping.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/io.h> -#include <linux/of_device.h> -#include <linux/of_reserved_mem.h> -#include <linux/remoteproc.h> -#include <linux/slab.h> -#include <linux/uaccess.h> - -/**************************************************************************** - * Defines - ****************************************************************************/ - -#define MINOR_BASE 0 /* Minor version starts at 0 */ -#define MINOR_COUNT 64 /* Allocate minor versions */ - -/**************************************************************************** - * Variables - ****************************************************************************/ - -static DECLARE_BITMAP(minors, MINOR_COUNT); - -/**************************************************************************** - * Functions - ****************************************************************************/ - -/* Incoming messages */ -static int ethosu_handle_rpmsg(struct rpmsg_device *rpdev, - void *data, - int len, - void *priv, - u32 src) -{ - struct ethosu_device *edev = dev_get_drvdata(&rpdev->dev); - struct device *dev = &edev->dev; - struct ethosu_mailbox *mbox = &edev->mailbox; - struct ethosu_core_rpmsg *rpmsg = data; - int length = len - sizeof(rpmsg->header); - int ret = 0; - - if (unlikely(rpmsg->header.magic != ETHOSU_CORE_MSG_MAGIC)) { - dev_warn(dev, "Msg: Error invalid message magic. magic=0x%08x", - rpmsg->header.magic); - - return -EBADMSG; - } - - device_lock(dev); - - dev_dbg(dev, - "Msg: magic=0x%08x, type=%u, msg_id=%llu", - rpmsg->header.magic, rpmsg->header.type, rpmsg->header.msg_id); - - switch (rpmsg->header.type) { - case ETHOSU_CORE_MSG_ERR: - if (length != sizeof(rpmsg->error)) { - dev_warn(dev, - "Msg: Error message of incorrect size. size=%u, expected=%zu", length, - sizeof(rpmsg->error)); - ret = -EBADMSG; - break; - } - - rpmsg->error.msg[sizeof(rpmsg->error.msg) - 1] = '\0'; - dev_warn(dev, "Msg: Error. type=%u, msg=\"%s\"", - rpmsg->error.type, rpmsg->error.msg); - - rproc_report_crash(rproc_get_by_child(dev), RPROC_FATAL_ERROR); - break; - case ETHOSU_CORE_MSG_PING: - dev_dbg(dev, "Msg: Ping"); - ret = ethosu_mailbox_pong(mbox); - break; - case ETHOSU_CORE_MSG_PONG: - dev_dbg(dev, "Msg: Pong"); - break; - case ETHOSU_CORE_MSG_INFERENCE_RSP: - if (length != sizeof(rpmsg->inf_rsp)) { - dev_warn(dev, - "Msg: Inference response of incorrect size. size=%u, expected=%zu", length, - sizeof(rpmsg->inf_rsp)); - ret = -EBADMSG; - break; - } - - dev_dbg(dev, - "Msg: Inference response. ofm_count=%u, status=%u", - rpmsg->inf_rsp.ofm_count, rpmsg->inf_rsp.status); - - ethosu_inference_rsp(mbox, rpmsg->header.msg_id, - &rpmsg->inf_rsp); - break; - case ETHOSU_CORE_MSG_CANCEL_INFERENCE_RSP: - if (length != sizeof(rpmsg->cancel_rsp)) { - dev_warn(dev, - "Msg: Cancel Inference response of incorrect size. size=%u, expected=%zu", length, - sizeof(rpmsg->cancel_rsp)); - ret = -EBADMSG; - break; - } - - dev_dbg(dev, - "Msg: Cancel Inference response. status=%u", - rpmsg->cancel_rsp.status); - ethosu_cancel_inference_rsp(mbox, - rpmsg->header.msg_id, - &rpmsg->cancel_rsp); - break; - case ETHOSU_CORE_MSG_VERSION_RSP: - if (length != sizeof(rpmsg->version_rsp)) { - dev_warn(dev, - "Msg: Protocol version response of incorrect size. size=%u, expected=%zu", length, - sizeof(rpmsg->version_rsp)); - ret = -EBADMSG; - break; - } - - dev_dbg(dev, "Msg: Protocol version response %u.%u.%u", - rpmsg->version_rsp.major, rpmsg->version_rsp.minor, - rpmsg->version_rsp.patch); - - ethosu_version_rsp(mbox, rpmsg->header.msg_id, - &rpmsg->version_rsp); - break; - case ETHOSU_CORE_MSG_CAPABILITIES_RSP: - if (length != sizeof(rpmsg->cap_rsp)) { - dev_warn(dev, - "Msg: Capabilities response of incorrect size. size=%u, expected=%zu", length, - sizeof(rpmsg->cap_rsp)); - ret = -EBADMSG; - break; - } - - dev_dbg(dev, - "Msg: Capabilities response vs%hhu v%hhu.%hhu p%hhu av%hhu.%hhu.%hhu dv%hhu.%hhu.%hhu mcc%hhu csv%hhu cd%hhu", - rpmsg->cap_rsp.version_status, - rpmsg->cap_rsp.version_major, - rpmsg->cap_rsp.version_minor, - rpmsg->cap_rsp.product_major, - rpmsg->cap_rsp.arch_major_rev, - rpmsg->cap_rsp.arch_minor_rev, - rpmsg->cap_rsp.arch_patch_rev, - rpmsg->cap_rsp.driver_major_rev, - rpmsg->cap_rsp.driver_minor_rev, - rpmsg->cap_rsp.driver_patch_rev, - rpmsg->cap_rsp.macs_per_cc, - rpmsg->cap_rsp.cmd_stream_version, - rpmsg->cap_rsp.custom_dma); - - ethosu_capability_rsp(mbox, rpmsg->header.msg_id, - &rpmsg->cap_rsp); - break; - case ETHOSU_CORE_MSG_NETWORK_INFO_RSP: - if (length != sizeof(rpmsg->net_info_rsp)) { - dev_warn(dev, - "Msg: Network info response of incorrect size. size=%u, expected=%zu", length, - sizeof(rpmsg->net_info_rsp)); - ret = -EBADMSG; - break; - } - - dev_dbg(dev, - "Msg: Network info response. status=%u", - rpmsg->net_info_rsp.status); - - ethosu_network_info_rsp(mbox, - rpmsg->header.msg_id, - &rpmsg->net_info_rsp); - - break; - default: - /* This should not happen due to version checks */ - dev_warn(dev, "Msg: Protocol error. type=%u", - rpmsg->header.type); - ret = -EPROTO; - break; - } - - device_unlock(dev); - - wake_up(&mbox->send_queue); - - return ret; -} - -static int ethosu_open(struct inode *inode, - struct file *file) -{ - struct cdev *cdev = inode->i_cdev; - struct ethosu_device *edev = container_of(cdev, struct ethosu_device, - cdev); - struct rpmsg_device *rpdev = edev->rpdev; - struct device *dev = &edev->dev; - - dev_dbg(dev, "Device open. file=0x%pK", file); - - file->private_data = rpdev; - - return nonseekable_open(inode, file); -} - -static long ethosu_ioctl(struct file *file, - unsigned int cmd, - unsigned long arg) -{ - struct rpmsg_device *rpdev = file->private_data; - struct ethosu_device *edev = dev_get_drvdata(&rpdev->dev); - struct device *dev = &edev->dev; - void __user *udata = (void __user *)arg; - int ret; - - switch (cmd) { - case ETHOSU_IOCTL_DRIVER_VERSION_GET: { - const struct ethosu_uapi_kernel_driver_version version = { - .major = ETHOSU_KERNEL_DRIVER_VERSION_MAJOR, - .minor = ETHOSU_KERNEL_DRIVER_VERSION_MINOR, - .patch = ETHOSU_KERNEL_DRIVER_VERSION_PATCH, - }; - - ret = copy_to_user(udata, &version, - sizeof(version)) ? -EFAULT : 0; - break; - } - case ETHOSU_IOCTL_CAPABILITIES_REQ: { - dev_dbg(dev, "Device ioctl: Capabilities request"); - - ret = copy_to_user(udata, &edev->capabilities, - sizeof(edev->capabilities)) ? -EFAULT : 0; - break; - } - case ETHOSU_IOCTL_PING: { - ret = device_lock_interruptible(dev); - if (ret) - return ret; - - dev_dbg(dev, "Device ioctl: Send ping"); - - ret = ethosu_mailbox_ping(&edev->mailbox); - - device_unlock(dev); - - break; - } - case ETHOSU_IOCTL_BUFFER_CREATE: { - struct ethosu_uapi_buffer_create uapi; - - if (copy_from_user(&uapi, udata, sizeof(uapi))) { - ret = -EFAULT; - break; - } - - ret = device_lock_interruptible(dev); - if (ret) - return ret; - - dev_dbg(dev, - "Device ioctl: Buffer create. size=%u", - uapi.size); - - ret = ethosu_buffer_create(dev, uapi.size); - - device_unlock(dev); - - break; - } - case ETHOSU_IOCTL_NETWORK_CREATE: { - struct ethosu_uapi_network_create uapi; - - if (copy_from_user(&uapi, udata, sizeof(uapi))) { - ret = -EFAULT; - break; - } - - ret = device_lock_interruptible(dev); - if (ret) - return ret; - - dev_dbg(dev, - "Device ioctl: Network create. type=%u\n", uapi.type); - - ret = ethosu_network_create(dev, &edev->mailbox, &uapi); - - device_unlock(dev); - - break; - } - default: { - dev_err(dev, "Invalid ioctl. cmd=%u, arg=%lu", - cmd, arg); - ret = -ENOIOCTLCMD; - break; - } - } - - return ret; -} - -static struct rpmsg_endpoint *ethosu_create_ept(struct rpmsg_device *rpdev) -{ - struct device *dev = &rpdev->dev; - struct rpmsg_channel_info info = { 0 }; - struct rpmsg_endpoint *ept; - - /* Create rpmsg endpoint */ - strncpy(info.name, rpdev->id.name, sizeof(info.name) - 1); - info.src = 0; - info.dst = rpdev->dst; - - dev_dbg(dev, "Creating rpmsg endpoint. name=%s, src=%u, dst=%u", - info.name, info.src, info.dst); - - ept = rpmsg_create_ept(rpdev, ethosu_handle_rpmsg, NULL, info); - if (!ept) { - dev_err(&rpdev->dev, "Failed to create endpoint"); - - return ERR_PTR(-EINVAL); - } - - return ept; -} - -static const struct file_operations fops = { - .owner = THIS_MODULE, - .open = ðosu_open, - .unlocked_ioctl = ðosu_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = ðosu_ioctl, -#endif -}; - -static void ethosu_dev_release(struct device *dev) -{ - struct ethosu_device *edev = dev_get_drvdata(dev); - - clear_bit(MINOR(edev->cdev.dev), minors); - - ethosu_mailbox_deinit(&edev->mailbox); - device_destroy(edev->class, edev->cdev.dev); - kfree(edev); -} - -static int ethosu_device_register(struct device *dev, - struct device *parent, - void *drvdata, - dev_t devt) -{ - struct rproc *rproc = rproc_get_by_child(parent); - int ret; - - dev->parent = parent; - dev->release = ethosu_dev_release; - dev_set_drvdata(dev, drvdata); - - ret = dev_set_name(dev, "ethosu%d", MINOR(devt)); - if (ret) { - dev_err(parent, "Failed to set device name. ret=%d", ret); - - return ret; - } - - /* Inherit DMA mask from rproc device */ - ret = dma_coerce_mask_and_coherent(dev, - dma_get_mask(rproc->dev.parent)); - if (ret) { - dev_err(parent, "Failed to set DMA mask. ret=%d", ret); - - return ret; - } - - /* Inherit DMA configuration from rproc device */ - ret = of_dma_configure(dev, rproc->dev.parent->of_node, false); - if (ret) { - dev_err(parent, "Failed to configure DMA. ret=%d", - ret); - - return ret; - } - - /* Inherit reserved memory from rproc device */ - ret = of_reserved_mem_device_init_by_idx(dev, - rproc->dev.parent->of_node, 0); - if (ret) { - dev_err(parent, "Failed to initialize reserved memory. ret=%d", - ret); - - return ret; - } - - ret = device_register(dev); - if (ret) { - dev_err(parent, "Failed to register device. ret=%d", ret); - - return ret; - } - - return 0; -} - -int ethosu_dev_init(struct rpmsg_device *rpdev, - struct class *class, - dev_t devt) -{ - struct device *dev = &rpdev->dev; - struct ethosu_device *edev; - struct device *sysdev; - int minor; - int ret; - - /* Reserve minor number for device node */ - minor = find_first_zero_bit(minors, MINOR_COUNT); - if (minor >= MINOR_COUNT) { - dev_err(dev, "No more minor numbers."); - - return -ENOMEM; - } - - devt = MKDEV(MAJOR(devt), minor); - - /* Allocate and create Ethos-U device */ - edev = kzalloc(sizeof(*edev), GFP_KERNEL); - if (!edev) - return -ENOMEM; - - dev_set_drvdata(&rpdev->dev, edev); - - edev->rpdev = rpdev; - edev->class = class; - - /* Create device object */ - ret = ethosu_device_register(&edev->dev, &rpdev->dev, edev, - devt); - if (ret) { - kfree(edev); - - return ret; - } - - /* Continue with new device */ - dev = &edev->dev; - - /* Create RPMsg endpoint */ - edev->ept = ethosu_create_ept(rpdev); - if (IS_ERR(edev->ept)) { - ret = PTR_ERR(edev->ept); - goto device_unregister; - } - - ret = ethosu_mailbox_init(&edev->mailbox, dev, edev->ept); - if (ret) - goto free_rpmsg_ept; - - device_lock(dev); - ret = ethosu_version_check_request(dev, &edev->mailbox); - device_unlock(dev); - if (ret) { - dev_err(dev, "Protocol version check failed: %d", ret); - goto deinit_mailbox; - } - - device_lock(dev); - ret = ethosu_capabilities_request(dev, &edev->mailbox, - &edev->capabilities); - device_unlock(dev); - if (ret) { - dev_err(dev, "Failed to get device capabilities: %d", ret); - goto deinit_mailbox; - } - - /* Create device node */ - cdev_init(&edev->cdev, &fops); - edev->cdev.owner = THIS_MODULE; - - cdev_set_parent(&edev->cdev, &dev->kobj); - - ret = cdev_add(&edev->cdev, devt, 1); - if (ret) { - dev_err(dev, "Failed to add character device."); - goto deinit_mailbox; - } - - sysdev = device_create(edev->class, NULL, devt, rpdev, - "ethosu%d", MINOR(devt)); - if (IS_ERR(sysdev)) { - dev_err(dev, "Failed to create device."); - ret = PTR_ERR(sysdev); - goto del_cdev; - } - - set_bit(minor, minors); - - dev_info(dev, - "Created Arm Ethos-U device. name=%s, major=%d, minor=%d", - dev_name(sysdev), MAJOR(devt), MINOR(devt)); - - return 0; - -del_cdev: - cdev_del(&edev->cdev); - -deinit_mailbox: - ethosu_mailbox_deinit(&edev->mailbox); - -free_rpmsg_ept: - rpmsg_destroy_ept(edev->ept); - -device_unregister: - device_unregister(dev); - - return ret; -} - -void ethosu_dev_deinit(struct rpmsg_device *rpdev) -{ - struct device *dev = &rpdev->dev; - struct ethosu_device *edev = dev_get_drvdata(dev); - - device_lock(&edev->dev); - ethosu_mailbox_fail(&edev->mailbox); - device_unlock(&edev->dev); - - rpmsg_destroy_ept(edev->ept); - cdev_del(&edev->cdev); - device_unregister(&edev->dev); -} |