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-rw-r--r--sound/soc/sof/sof-client-ipc-msg-injector.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/sound/soc/sof/sof-client-ipc-msg-injector.c b/sound/soc/sof/sof-client-ipc-msg-injector.c
new file mode 100644
index 0000000000..752d532068
--- /dev/null
+++ b/sound/soc/sof/sof-client-ipc-msg-injector.c
@@ -0,0 +1,340 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2022 Intel Corporation. All rights reserved.
+//
+// Author: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
+//
+
+#include <linux/auxiliary_bus.h>
+#include <linux/completion.h>
+#include <linux/debugfs.h>
+#include <linux/ktime.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <sound/sof/header.h>
+#include <sound/sof/ipc4/header.h>
+
+#include "sof-client.h"
+
+#define SOF_IPC_CLIENT_SUSPEND_DELAY_MS 3000
+
+struct sof_msg_inject_priv {
+ struct dentry *dfs_file;
+ size_t max_msg_size;
+ enum sof_ipc_type ipc_type;
+
+ void *tx_buffer;
+ void *rx_buffer;
+};
+
+static int sof_msg_inject_dfs_open(struct inode *inode, struct file *file)
+{
+ struct sof_client_dev *cdev = inode->i_private;
+ int ret;
+
+ if (sof_client_get_fw_state(cdev) == SOF_FW_CRASHED)
+ return -ENODEV;
+
+ 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_msg_inject_dfs_read(struct file *file, 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_reply *rhdr = priv->rx_buffer;
+
+ if (!rhdr->hdr.size || !count || *ppos)
+ return 0;
+
+ if (count > rhdr->hdr.size)
+ count = rhdr->hdr.size;
+
+ if (copy_to_user(buffer, priv->rx_buffer, count))
+ return -EFAULT;
+
+ *ppos += count;
+ return count;
+}
+
+static ssize_t sof_msg_inject_ipc4_dfs_read(struct file *file,
+ 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_ipc4_msg *ipc4_msg = priv->rx_buffer;
+ size_t header_size = sizeof(ipc4_msg->header_u64);
+ size_t remaining;
+
+ if (!ipc4_msg->header_u64 || !count || *ppos)
+ return 0;
+
+ /* we need space for the header at minimum (u64) */
+ if (count < header_size)
+ return -ENOSPC;
+
+ remaining = header_size;
+
+ /* Only get large config have payload */
+ if (SOF_IPC4_MSG_IS_MODULE_MSG(ipc4_msg->primary) &&
+ (SOF_IPC4_MSG_TYPE_GET(ipc4_msg->primary) == SOF_IPC4_MOD_LARGE_CONFIG_GET))
+ remaining += ipc4_msg->data_size;
+
+ if (count > remaining)
+ count = remaining;
+ else if (count < remaining)
+ remaining = count;
+
+ /* copy the header first */
+ if (copy_to_user(buffer, &ipc4_msg->header_u64, header_size))
+ return -EFAULT;
+
+ *ppos += header_size;
+ remaining -= header_size;
+
+ if (!remaining)
+ return count;
+
+ if (remaining > ipc4_msg->data_size)
+ remaining = ipc4_msg->data_size;
+
+ /* Copy the payload */
+ if (copy_to_user(buffer + *ppos, ipc4_msg->data_ptr, remaining))
+ return -EFAULT;
+
+ *ppos += remaining;
+ return count;
+}
+
+static int sof_msg_inject_send_message(struct sof_client_dev *cdev)
+{
+ struct sof_msg_inject_priv *priv = cdev->data;
+ struct device *dev = &cdev->auxdev.dev;
+ int ret, err;
+
+ 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;
+ }
+
+ /* send the message */
+ ret = sof_client_ipc_tx_message(cdev, priv->tx_buffer, priv->rx_buffer,
+ priv->max_msg_size);
+ if (ret)
+ dev_err(dev, "IPC message send failed: %d\n", ret);
+
+ pm_runtime_mark_last_busy(dev);
+ err = pm_runtime_put_autosuspend(dev);
+ if (err < 0)
+ dev_err_ratelimited(dev, "debugfs write failed to idle %d\n", err);
+
+ return ret;
+}
+
+static ssize_t sof_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;
+ ssize_t size;
+ int ret;
+
+ if (*ppos)
+ return 0;
+
+ size = simple_write_to_buffer(priv->tx_buffer, priv->max_msg_size,
+ ppos, buffer, count);
+ if (size < 0)
+ return size;
+ if (size != count)
+ return -EFAULT;
+
+ memset(priv->rx_buffer, 0, priv->max_msg_size);
+
+ ret = sof_msg_inject_send_message(cdev);
+
+ /* return the error code if test failed */
+ if (ret < 0)
+ size = ret;
+
+ return size;
+};
+
+static ssize_t sof_msg_inject_ipc4_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_ipc4_msg *ipc4_msg = priv->tx_buffer;
+ size_t data_size;
+ int ret;
+
+ if (*ppos)
+ return 0;
+
+ if (count < sizeof(ipc4_msg->header_u64))
+ return -EINVAL;
+
+ /* copy the header first */
+ if (copy_from_user(&ipc4_msg->header_u64, buffer,
+ sizeof(ipc4_msg->header_u64)))
+ return -EFAULT;
+
+ data_size = count - sizeof(ipc4_msg->header_u64);
+ if (data_size > priv->max_msg_size)
+ return -EINVAL;
+
+ /* Copy the payload */
+ if (copy_from_user(ipc4_msg->data_ptr,
+ buffer + sizeof(ipc4_msg->header_u64), data_size))
+ return -EFAULT;
+
+ ipc4_msg->data_size = data_size;
+
+ /* Initialize the reply storage */
+ ipc4_msg = priv->rx_buffer;
+ ipc4_msg->header_u64 = 0;
+ ipc4_msg->data_size = priv->max_msg_size;
+ memset(ipc4_msg->data_ptr, 0, priv->max_msg_size);
+
+ ret = sof_msg_inject_send_message(cdev);
+
+ /* return the error code if test failed */
+ if (ret < 0)
+ return 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_msg_inject_fops = {
+ .open = sof_msg_inject_dfs_open,
+ .read = sof_msg_inject_dfs_read,
+ .write = sof_msg_inject_dfs_write,
+ .llseek = default_llseek,
+ .release = sof_msg_inject_dfs_release,
+
+ .owner = THIS_MODULE,
+};
+
+static const struct file_operations sof_msg_inject_ipc4_fops = {
+ .open = sof_msg_inject_dfs_open,
+ .read = sof_msg_inject_ipc4_dfs_read,
+ .write = sof_msg_inject_ipc4_dfs_write,
+ .llseek = default_llseek,
+ .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);
+ static const struct file_operations *fops;
+ 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->ipc_type = sof_client_get_ipc_type(cdev);
+ priv->max_msg_size = sof_client_get_ipc_max_payload_size(cdev);
+ alloc_size = priv->max_msg_size;
+
+ if (priv->ipc_type == SOF_INTEL_IPC4)
+ alloc_size += sizeof(struct sof_ipc4_msg);
+
+ priv->tx_buffer = devm_kmalloc(dev, alloc_size, GFP_KERNEL);
+ priv->rx_buffer = devm_kzalloc(dev, alloc_size, GFP_KERNEL);
+ if (!priv->tx_buffer || !priv->rx_buffer)
+ return -ENOMEM;
+
+ if (priv->ipc_type == SOF_INTEL_IPC4) {
+ struct sof_ipc4_msg *ipc4_msg;
+
+ ipc4_msg = priv->tx_buffer;
+ ipc4_msg->data_ptr = priv->tx_buffer + sizeof(struct sof_ipc4_msg);
+
+ ipc4_msg = priv->rx_buffer;
+ ipc4_msg->data_ptr = priv->rx_buffer + sizeof(struct sof_ipc4_msg);
+
+ fops = &sof_msg_inject_ipc4_fops;
+ } else {
+ fops = &sof_msg_inject_fops;
+ }
+
+ cdev->data = priv;
+
+ priv->dfs_file = debugfs_create_file("ipc_msg_inject", 0644, debugfs_root,
+ cdev, fops);
+
+ /* enable runtime PM */
+ pm_runtime_set_autosuspend_delay(dev, SOF_IPC_CLIENT_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(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->dfs_file);
+}
+
+static const struct auxiliary_device_id sof_msg_inject_client_id_table[] = {
+ { .name = "snd_sof.msg_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 Message Injector Client Driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);