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340 lines
8.5 KiB
340 lines
8.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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// |
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// Copyright(c) 2022 Intel Corporation. All rights reserved. |
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// |
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// Author: Peter Ujfalusi <[email protected]> |
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// |
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#include <linux/auxiliary_bus.h> |
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#include <linux/completion.h> |
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#include <linux/debugfs.h> |
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#include <linux/ktime.h> |
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#include <linux/mod_devicetable.h> |
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#include <linux/module.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/slab.h> |
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#include <linux/uaccess.h> |
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#include <sound/sof/header.h> |
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#include <sound/sof/ipc4/header.h> |
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#include "sof-client.h" |
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#define SOF_IPC_CLIENT_SUSPEND_DELAY_MS 3000 |
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struct sof_msg_inject_priv { |
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struct dentry *dfs_file; |
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size_t max_msg_size; |
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enum sof_ipc_type ipc_type; |
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void *tx_buffer; |
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void *rx_buffer; |
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}; |
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static int sof_msg_inject_dfs_open(struct inode *inode, struct file *file) |
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{ |
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struct sof_client_dev *cdev = inode->i_private; |
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int ret; |
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if (sof_client_get_fw_state(cdev) == SOF_FW_CRASHED) |
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return -ENODEV; |
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ret = debugfs_file_get(file->f_path.dentry); |
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if (unlikely(ret)) |
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return ret; |
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ret = simple_open(inode, file); |
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if (ret) |
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debugfs_file_put(file->f_path.dentry); |
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return ret; |
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} |
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static ssize_t sof_msg_inject_dfs_read(struct file *file, char __user *buffer, |
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size_t count, loff_t *ppos) |
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{ |
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struct sof_client_dev *cdev = file->private_data; |
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struct sof_msg_inject_priv *priv = cdev->data; |
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struct sof_ipc_reply *rhdr = priv->rx_buffer; |
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if (!rhdr->hdr.size || !count || *ppos) |
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return 0; |
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if (count > rhdr->hdr.size) |
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count = rhdr->hdr.size; |
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if (copy_to_user(buffer, priv->rx_buffer, count)) |
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return -EFAULT; |
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*ppos += count; |
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return count; |
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} |
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static ssize_t sof_msg_inject_ipc4_dfs_read(struct file *file, |
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char __user *buffer, |
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size_t count, loff_t *ppos) |
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{ |
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struct sof_client_dev *cdev = file->private_data; |
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struct sof_msg_inject_priv *priv = cdev->data; |
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struct sof_ipc4_msg *ipc4_msg = priv->rx_buffer; |
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size_t header_size = sizeof(ipc4_msg->header_u64); |
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size_t remaining; |
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if (!ipc4_msg->header_u64 || !count || *ppos) |
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return 0; |
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/* we need space for the header at minimum (u64) */ |
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if (count < header_size) |
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return -ENOSPC; |
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remaining = header_size; |
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/* Only get large config have payload */ |
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if (SOF_IPC4_MSG_IS_MODULE_MSG(ipc4_msg->primary) && |
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(SOF_IPC4_MSG_TYPE_GET(ipc4_msg->primary) == SOF_IPC4_MOD_LARGE_CONFIG_GET)) |
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remaining += ipc4_msg->data_size; |
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if (count > remaining) |
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count = remaining; |
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else if (count < remaining) |
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remaining = count; |
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/* copy the header first */ |
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if (copy_to_user(buffer, &ipc4_msg->header_u64, header_size)) |
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return -EFAULT; |
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*ppos += header_size; |
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remaining -= header_size; |
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if (!remaining) |
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return count; |
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if (remaining > ipc4_msg->data_size) |
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remaining = ipc4_msg->data_size; |
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/* Copy the payload */ |
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if (copy_to_user(buffer + *ppos, ipc4_msg->data_ptr, remaining)) |
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return -EFAULT; |
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*ppos += remaining; |
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return count; |
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} |
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static int sof_msg_inject_send_message(struct sof_client_dev *cdev) |
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{ |
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struct sof_msg_inject_priv *priv = cdev->data; |
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struct device *dev = &cdev->auxdev.dev; |
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int ret, err; |
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ret = pm_runtime_resume_and_get(dev); |
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if (ret < 0 && ret != -EACCES) { |
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dev_err_ratelimited(dev, "debugfs write failed to resume %d\n", ret); |
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return ret; |
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} |
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/* send the message */ |
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ret = sof_client_ipc_tx_message(cdev, priv->tx_buffer, priv->rx_buffer, |
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priv->max_msg_size); |
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if (ret) |
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dev_err(dev, "IPC message send failed: %d\n", ret); |
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pm_runtime_mark_last_busy(dev); |
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err = pm_runtime_put_autosuspend(dev); |
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if (err < 0) |
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dev_err_ratelimited(dev, "debugfs write failed to idle %d\n", err); |
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return ret; |
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} |
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static ssize_t sof_msg_inject_dfs_write(struct file *file, const char __user *buffer, |
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size_t count, loff_t *ppos) |
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{ |
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struct sof_client_dev *cdev = file->private_data; |
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struct sof_msg_inject_priv *priv = cdev->data; |
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ssize_t size; |
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int ret; |
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if (*ppos) |
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return 0; |
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size = simple_write_to_buffer(priv->tx_buffer, priv->max_msg_size, |
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ppos, buffer, count); |
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if (size < 0) |
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return size; |
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if (size != count) |
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return -EFAULT; |
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memset(priv->rx_buffer, 0, priv->max_msg_size); |
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ret = sof_msg_inject_send_message(cdev); |
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/* return the error code if test failed */ |
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if (ret < 0) |
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size = ret; |
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return size; |
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}; |
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static ssize_t sof_msg_inject_ipc4_dfs_write(struct file *file, |
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const char __user *buffer, |
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size_t count, loff_t *ppos) |
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{ |
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struct sof_client_dev *cdev = file->private_data; |
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struct sof_msg_inject_priv *priv = cdev->data; |
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struct sof_ipc4_msg *ipc4_msg = priv->tx_buffer; |
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size_t data_size; |
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int ret; |
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if (*ppos) |
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return 0; |
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if (count < sizeof(ipc4_msg->header_u64)) |
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return -EINVAL; |
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/* copy the header first */ |
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if (copy_from_user(&ipc4_msg->header_u64, buffer, |
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sizeof(ipc4_msg->header_u64))) |
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return -EFAULT; |
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data_size = count - sizeof(ipc4_msg->header_u64); |
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if (data_size > priv->max_msg_size) |
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return -EINVAL; |
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/* Copy the payload */ |
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if (copy_from_user(ipc4_msg->data_ptr, |
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buffer + sizeof(ipc4_msg->header_u64), data_size)) |
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return -EFAULT; |
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ipc4_msg->data_size = data_size; |
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/* Initialize the reply storage */ |
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ipc4_msg = priv->rx_buffer; |
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ipc4_msg->header_u64 = 0; |
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ipc4_msg->data_size = priv->max_msg_size; |
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memset(ipc4_msg->data_ptr, 0, priv->max_msg_size); |
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ret = sof_msg_inject_send_message(cdev); |
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/* return the error code if test failed */ |
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if (ret < 0) |
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return ret; |
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return count; |
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}; |
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static int sof_msg_inject_dfs_release(struct inode *inode, struct file *file) |
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{ |
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debugfs_file_put(file->f_path.dentry); |
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return 0; |
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} |
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static const struct file_operations sof_msg_inject_fops = { |
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.open = sof_msg_inject_dfs_open, |
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.read = sof_msg_inject_dfs_read, |
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.write = sof_msg_inject_dfs_write, |
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.llseek = default_llseek, |
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.release = sof_msg_inject_dfs_release, |
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.owner = THIS_MODULE, |
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}; |
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static const struct file_operations sof_msg_inject_ipc4_fops = { |
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.open = sof_msg_inject_dfs_open, |
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.read = sof_msg_inject_ipc4_dfs_read, |
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.write = sof_msg_inject_ipc4_dfs_write, |
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.llseek = default_llseek, |
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.release = sof_msg_inject_dfs_release, |
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.owner = THIS_MODULE, |
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}; |
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static int sof_msg_inject_probe(struct auxiliary_device *auxdev, |
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const struct auxiliary_device_id *id) |
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{ |
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struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev); |
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struct dentry *debugfs_root = sof_client_get_debugfs_root(cdev); |
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static const struct file_operations *fops; |
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struct device *dev = &auxdev->dev; |
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struct sof_msg_inject_priv *priv; |
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size_t alloc_size; |
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/* allocate memory for client data */ |
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priv = devm_kzalloc(&auxdev->dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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priv->ipc_type = sof_client_get_ipc_type(cdev); |
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priv->max_msg_size = sof_client_get_ipc_max_payload_size(cdev); |
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alloc_size = priv->max_msg_size; |
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if (priv->ipc_type == SOF_INTEL_IPC4) |
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alloc_size += sizeof(struct sof_ipc4_msg); |
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priv->tx_buffer = devm_kmalloc(dev, alloc_size, GFP_KERNEL); |
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priv->rx_buffer = devm_kzalloc(dev, alloc_size, GFP_KERNEL); |
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if (!priv->tx_buffer || !priv->rx_buffer) |
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return -ENOMEM; |
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if (priv->ipc_type == SOF_INTEL_IPC4) { |
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struct sof_ipc4_msg *ipc4_msg; |
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ipc4_msg = priv->tx_buffer; |
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ipc4_msg->data_ptr = priv->tx_buffer + sizeof(struct sof_ipc4_msg); |
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ipc4_msg = priv->rx_buffer; |
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ipc4_msg->data_ptr = priv->rx_buffer + sizeof(struct sof_ipc4_msg); |
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fops = &sof_msg_inject_ipc4_fops; |
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} else { |
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fops = &sof_msg_inject_fops; |
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} |
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cdev->data = priv; |
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priv->dfs_file = debugfs_create_file("ipc_msg_inject", 0644, debugfs_root, |
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cdev, fops); |
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/* enable runtime PM */ |
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pm_runtime_set_autosuspend_delay(dev, SOF_IPC_CLIENT_SUSPEND_DELAY_MS); |
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pm_runtime_use_autosuspend(dev); |
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pm_runtime_enable(dev); |
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pm_runtime_mark_last_busy(dev); |
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pm_runtime_idle(dev); |
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return 0; |
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} |
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static void sof_msg_inject_remove(struct auxiliary_device *auxdev) |
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{ |
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struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev); |
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struct sof_msg_inject_priv *priv = cdev->data; |
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pm_runtime_disable(&auxdev->dev); |
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debugfs_remove(priv->dfs_file); |
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} |
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static const struct auxiliary_device_id sof_msg_inject_client_id_table[] = { |
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{ .name = "snd_sof.msg_injector" }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(auxiliary, sof_msg_inject_client_id_table); |
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/* |
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* No need for driver pm_ops as the generic pm callbacks in the auxiliary bus |
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* type are enough to ensure that the parent SOF device resumes to bring the DSP |
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* back to D0. |
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* Driver name will be set based on KBUILD_MODNAME. |
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*/ |
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static struct auxiliary_driver sof_msg_inject_client_drv = { |
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.probe = sof_msg_inject_probe, |
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.remove = sof_msg_inject_remove, |
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.id_table = sof_msg_inject_client_id_table, |
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}; |
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module_auxiliary_driver(sof_msg_inject_client_drv); |
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MODULE_DESCRIPTION("SOF IPC Message Injector Client Driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);
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