diff options
| -rw-r--r-- | sound/soc/sof/Kconfig | 8 | ||||
| -rw-r--r-- | sound/soc/sof/debug.c | 107 | ||||
| -rw-r--r-- | sound/soc/sof/sof-priv.h | 4 |
3 files changed, 119 insertions, 0 deletions
diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig index b6fa659179b6..89eea5558190 100644 --- a/sound/soc/sof/Kconfig +++ b/sound/soc/sof/Kconfig @@ -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 diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c index dc1df5fb7b4c..2f8b5ac9b78a 100644 --- a/sound/soc/sof/debug.c +++ b/sound/soc/sof/debug.c @@ -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); diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 2c97ffa98e3e..9a8af76b2f8b 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -326,6 +326,10 @@ struct snd_sof_dfsentry { #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 */ union { |