@@ -194,6 +194,14 @@ config SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST
Say Y if you want to enable IPC flood test.
If unsure, select "N".
+config SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR
+ bool "SOF enable IPC message injector"
+ help
+ This option enables the IPC message injector which can be used to send
+ crafted IPC messages to the DSP to test its robustness.
+ Say Y if you want to enable the IPC message injector.
+ If unsure, select "N".
+
config SND_SOC_SOF_DEBUG_RETAIN_DSP_CONTEXT
bool "SOF retain DSP context on any FW exceptions"
help
@@ -336,6 +336,104 @@ static int sof_debug_ipc_flood_test(struct snd_sof_dev *sdev,
}
#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR)
+static ssize_t msg_inject_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct snd_sof_dfsentry *dfse = file->private_data;
+ struct sof_ipc_reply *rhdr = dfse->msg_inject_rx;
+
+ if (!rhdr->hdr.size || !count || *ppos)
+ return 0;
+
+ if (count > rhdr->hdr.size)
+ count = rhdr->hdr.size;
+
+ if (copy_to_user(buffer, dfse->msg_inject_rx, count))
+ return -EFAULT;
+
+ *ppos += count;
+ return count;
+}
+
+static ssize_t msg_inject_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct snd_sof_dfsentry *dfse = file->private_data;
+ struct snd_sof_dev *sdev = dfse->sdev;
+ struct sof_ipc_cmd_hdr *hdr = dfse->msg_inject_tx;
+ size_t size;
+ int ret, err;
+
+ if (*ppos)
+ return 0;
+
+ size = simple_write_to_buffer(dfse->msg_inject_tx, SOF_IPC_MSG_MAX_SIZE,
+ ppos, buffer, count);
+ if (size != count)
+ return size > 0 ? -EFAULT : size;
+
+ ret = pm_runtime_get_sync(sdev->dev);
+ if (ret < 0 && ret != -EACCES) {
+ dev_err_ratelimited(sdev->dev, "%s: DSP resume failed: %d\n",
+ __func__, ret);
+ pm_runtime_put_noidle(sdev->dev);
+ goto out;
+ }
+
+ /* send the message */
+ memset(dfse->msg_inject_rx, 0, SOF_IPC_MSG_MAX_SIZE);
+ ret = sof_ipc_tx_message(sdev->ipc, hdr->cmd, dfse->msg_inject_tx, count,
+ dfse->msg_inject_rx, SOF_IPC_MSG_MAX_SIZE);
+
+ pm_runtime_mark_last_busy(sdev->dev);
+ err = pm_runtime_put_autosuspend(sdev->dev);
+ if (err < 0)
+ dev_err_ratelimited(sdev->dev, "%s: DSP idle failed: %d\n",
+ __func__, err);
+
+ /* return size if test is successful */
+ if (ret >= 0)
+ ret = size;
+
+out:
+ return ret;
+}
+
+static const struct file_operations msg_inject_fops = {
+ .open = simple_open,
+ .read = msg_inject_read,
+ .write = msg_inject_write,
+ .llseek = default_llseek,
+};
+
+static int snd_sof_debugfs_msg_inject_item(struct snd_sof_dev *sdev,
+ const char *name, mode_t mode,
+ const struct file_operations *fops)
+{
+ struct snd_sof_dfsentry *dfse;
+
+ dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
+ if (!dfse)
+ return -ENOMEM;
+
+ /* pre allocate the tx and rx buffers */
+ dfse->msg_inject_tx = devm_kzalloc(sdev->dev, SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL);
+ dfse->msg_inject_rx = devm_kzalloc(sdev->dev, SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL);
+ if (!dfse->msg_inject_tx || !dfse->msg_inject_rx)
+ return -ENOMEM;
+
+ dfse->type = SOF_DFSENTRY_TYPE_BUF;
+ dfse->sdev = sdev;
+
+ debugfs_create_file(name, mode, sdev->debugfs_root, dfse, fops);
+ /* add to dfsentry list */
+ list_add(&dfse->list, &sdev->dfsentry_list);
+
+ return 0;
+}
+#endif
+
static ssize_t sof_dfsentry_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
@@ -812,6 +910,15 @@ int snd_sof_dbg_init(struct snd_sof_dev *sdev)
return err;
#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR)
+ err = snd_sof_debugfs_msg_inject_item(sdev, "ipc_msg_inject", 0644,
+ &msg_inject_fops);
+
+ /* errors are only due to memory allocation, not debugfs */
+ if (err < 0)
+ return err;
+#endif
+
return 0;
}
EXPORT_SYMBOL_GPL(snd_sof_dbg_init);
@@ -325,6 +325,10 @@ struct snd_sof_dfsentry {
enum sof_debugfs_access_type access_type;
#if ENABLE_DEBUGFS_CACHEBUF
char *cache_buf; /* buffer to cache the contents of debugfs memory */
+#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR)
+ void *msg_inject_tx;
+ void *msg_inject_rx;
#endif
struct snd_sof_dev *sdev;
struct list_head list; /* list in sdev dfsentry list */