--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2023 Google Inc. All rights reserved.
+//
+// Author: Curtis Malainey <cujomalainey@chromium.org>
+//
+
+#include <linux/auxiliary_bus.h>
+#include <linux/debugfs.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <sound/sof/header.h>
+
+#include "sof-client.h"
+
+#define SOF_IPC_CLIENT_SUSPEND_DELAY_MS 3000
+
+struct sof_msg_inject_priv {
+ struct dentry *kernel_dfs_file;
+ size_t max_msg_size;
+
+ void *kernel_buffer;
+};
+
+static int sof_msg_inject_dfs_open(struct inode *inode, struct file *file)
+{
+ int ret = debugfs_file_get(file->f_path.dentry);
+
+ if (unlikely(ret))
+ return ret;
+
+ ret = simple_open(inode, file);
+ if (ret)
+ debugfs_file_put(file->f_path.dentry);
+
+ return ret;
+}
+
+static ssize_t sof_kernel_msg_inject_dfs_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct sof_client_dev *cdev = file->private_data;
+ struct sof_msg_inject_priv *priv = cdev->data;
+ struct sof_ipc_cmd_hdr *hdr = priv->kernel_buffer;
+ struct device *dev = &cdev->auxdev.dev;
+ ssize_t size;
+ int ret;
+
+ if (*ppos)
+ return 0;
+
+ size = simple_write_to_buffer(priv->kernel_buffer, priv->max_msg_size,
+ ppos, buffer, count);
+ if (size < 0)
+ return size;
+ if (size != count)
+ return -EFAULT;
+
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret < 0 && ret != -EACCES) {
+ dev_err_ratelimited(dev, "debugfs write failed to resume %d\n", ret);
+ return ret;
+ }
+
+ sof_client_ipc_rx_message(cdev, hdr, priv->kernel_buffer);
+
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+ if (ret < 0)
+ dev_err_ratelimited(dev, "debugfs write failed to idle %d\n", ret);
+
+ return count;
+};
+
+static int sof_msg_inject_dfs_release(struct inode *inode, struct file *file)
+{
+ debugfs_file_put(file->f_path.dentry);
+
+ return 0;
+}
+
+static const struct file_operations sof_kernel_msg_inject_fops = {
+ .open = sof_msg_inject_dfs_open,
+ .write = sof_kernel_msg_inject_dfs_write,
+ .release = sof_msg_inject_dfs_release,
+
+ .owner = THIS_MODULE,
+};
+
+static int sof_msg_inject_probe(struct auxiliary_device *auxdev,
+ const struct auxiliary_device_id *id)
+{
+ struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev);
+ struct dentry *debugfs_root = sof_client_get_debugfs_root(cdev);
+ struct device *dev = &auxdev->dev;
+ struct sof_msg_inject_priv *priv;
+ size_t alloc_size;
+
+ /* allocate memory for client data */
+ priv = devm_kzalloc(&auxdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->max_msg_size = sof_client_get_ipc_max_payload_size(cdev);
+ alloc_size = priv->max_msg_size;
+ priv->kernel_buffer = devm_kmalloc(dev, alloc_size, GFP_KERNEL);
+
+ if (!priv->kernel_buffer)
+ return -ENOMEM;
+
+ cdev->data = priv;
+
+ priv->kernel_dfs_file = debugfs_create_file("kernel_ipc_msg_inject", 0644,
+ debugfs_root, cdev,
+ &sof_kernel_msg_inject_fops);
+
+ /* enable runtime PM */
+ pm_runtime_set_autosuspend_delay(dev, SOF_IPC_CLIENT_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_idle(dev);
+
+ return 0;
+}
+
+static void sof_msg_inject_remove(struct auxiliary_device *auxdev)
+{
+ struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev);
+ struct sof_msg_inject_priv *priv = cdev->data;
+
+ pm_runtime_disable(&auxdev->dev);
+
+ debugfs_remove(priv->kernel_dfs_file);
+}
+
+static const struct auxiliary_device_id sof_msg_inject_client_id_table[] = {
+ { .name = "snd_sof.kernel_injector" },
+ {},
+};
+MODULE_DEVICE_TABLE(auxiliary, sof_msg_inject_client_id_table);
+
+/*
+ * No need for driver pm_ops as the generic pm callbacks in the auxiliary bus
+ * type are enough to ensure that the parent SOF device resumes to bring the DSP
+ * back to D0.
+ * Driver name will be set based on KBUILD_MODNAME.
+ */
+static struct auxiliary_driver sof_msg_inject_client_drv = {
+ .probe = sof_msg_inject_probe,
+ .remove = sof_msg_inject_remove,
+
+ .id_table = sof_msg_inject_client_id_table,
+};
+
+module_auxiliary_driver(sof_msg_inject_client_drv);
+
+MODULE_DESCRIPTION("SOF IPC Kernel Injector Client Driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);
#include "ops.h"
#include "sof-client.h"
#include "sof-priv.h"
+#include "ipc3-priv.h"
#include "ipc4-priv.h"
/**
static inline void sof_unregister_ipc_msg_injector(struct snd_sof_dev *sdev) {}
#endif /* CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR */
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_KERNEL_INJECTOR)
+static int sof_register_ipc_kernel_injector(struct snd_sof_dev *sdev)
+{
+ /* Only IPC3 supported right now */
+ if (sdev->pdata->ipc_type != SOF_IPC)
+ return 0;
+
+ return sof_client_dev_register(sdev, "kernel_injector", 0, NULL, 0);
+}
+
+static void sof_unregister_ipc_kernel_injector(struct snd_sof_dev *sdev)
+{
+ sof_client_dev_unregister(sdev, "kernel_injector", 0);
+}
+#else
+static inline int sof_register_ipc_kernel_injector(struct snd_sof_dev *sdev)
+{
+ return 0;
+}
+
+static inline void sof_unregister_ipc_kernel_injector(struct snd_sof_dev *sdev) {}
+#endif /* CONFIG_SND_SOC_SOF_DEBUG_IPC_KERNEL_INJECTOR */
+
int sof_register_clients(struct snd_sof_dev *sdev)
{
int ret;
goto err_msg_injector;
}
+ ret = sof_register_ipc_kernel_injector(sdev);
+ if (ret) {
+ dev_err(sdev->dev, "IPC kernel injector client registration failed\n");
+ goto err_kernel_injector;
+ }
+
/* Platform depndent client device registration */
if (sof_ops(sdev) && sof_ops(sdev)->register_ipc_clients)
if (!ret)
return 0;
+ sof_unregister_ipc_kernel_injector(sdev);
+
+err_kernel_injector:
sof_unregister_ipc_msg_injector(sdev);
err_msg_injector:
if (sof_ops(sdev) && sof_ops(sdev)->unregister_ipc_clients)
sof_ops(sdev)->unregister_ipc_clients(sdev);
+ sof_unregister_ipc_kernel_injector(sdev);
sof_unregister_ipc_msg_injector(sdev);
sof_unregister_ipc_flood_test(sdev);
}
}
EXPORT_SYMBOL_NS_GPL(sof_client_ipc_tx_message, SND_SOC_SOF_CLIENT);
+int sof_client_ipc_rx_message(struct sof_client_dev *cdev, void *ipc_msg, void *msg_buf)
+{
+ if (cdev->sdev->pdata->ipc_type == SOF_IPC) {
+ struct sof_ipc_cmd_hdr *hdr = ipc_msg;
+
+ if (hdr->size < sizeof(hdr)) {
+ dev_err(cdev->sdev->dev, "The received message size is invalid\n");
+ return -EINVAL;
+ }
+
+ sof_ipc3_do_rx_work(cdev->sdev, ipc_msg, msg_buf);
+ return 0;
+ }
+
+ return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL_NS_GPL(sof_client_ipc_rx_message, SND_SOC_SOF_CLIENT);
+
int sof_client_ipc_set_get_data(struct sof_client_dev *cdev, void *ipc_msg,
bool set)
{
OSDN Git Service
