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// SPDX-License-Identifier: GPL-2.0+
/*
* Debugfs tracing for bitstream buffers. This is similar to VA-API's
* LIBVA_TRACE_BUFDATA in that the raw bitstream can be dumped as a debugging
* aid.
*
* Produces one file per OUTPUT buffer. Files are automatically cleared on
* STREAMOFF unless the module parameter "keep_bitstream_buffers" is set.
*/
#include <linux/debugfs.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <media/v4l2-mem2mem.h>
#include "visl-debugfs.h"
int visl_debugfs_init(struct visl_dev *dev)
{
dev->debugfs_root = debugfs_create_dir("visl", NULL);
INIT_LIST_HEAD(&dev->bitstream_blobs);
mutex_init(&dev->bitstream_lock);
if (IS_ERR(dev->debugfs_root))
return PTR_ERR(dev->debugfs_root);
return visl_debugfs_bitstream_init(dev);
}
int visl_debugfs_bitstream_init(struct visl_dev *dev)
{
dev->bitstream_debugfs = debugfs_create_dir("bitstream",
dev->debugfs_root);
if (IS_ERR(dev->bitstream_debugfs))
return PTR_ERR(dev->bitstream_debugfs);
return 0;
}
void visl_trace_bitstream(struct visl_ctx *ctx, struct visl_run *run)
{
u8 *vaddr = vb2_plane_vaddr(&run->src->vb2_buf, 0);
struct visl_blob *blob;
size_t data_sz = vb2_get_plane_payload(&run->src->vb2_buf, 0);
struct dentry *dentry;
char name[32];
blob = kzalloc(sizeof(*blob), GFP_KERNEL);
if (!blob)
return;
blob->blob.data = vzalloc(data_sz);
if (!blob->blob.data)
goto err_vmalloc;
blob->blob.size = data_sz;
snprintf(name, 32, "bitstream%d", run->src->sequence);
memcpy(blob->blob.data, vaddr, data_sz);
dentry = debugfs_create_blob(name, 0444, ctx->dev->bitstream_debugfs,
&blob->blob);
if (IS_ERR(dentry))
goto err_debugfs;
blob->dentry = dentry;
mutex_lock(&ctx->dev->bitstream_lock);
list_add_tail(&blob->list, &ctx->dev->bitstream_blobs);
mutex_unlock(&ctx->dev->bitstream_lock);
return;
err_debugfs:
vfree(blob->blob.data);
err_vmalloc:
kfree(blob);
}
void visl_debugfs_clear_bitstream(struct visl_dev *dev)
{
struct visl_blob *blob;
struct visl_blob *tmp;
mutex_lock(&dev->bitstream_lock);
if (list_empty(&dev->bitstream_blobs))
goto unlock;
list_for_each_entry_safe(blob, tmp, &dev->bitstream_blobs, list) {
list_del(&blob->list);
debugfs_remove(blob->dentry);
vfree(blob->blob.data);
kfree(blob);
}
unlock:
mutex_unlock(&dev->bitstream_lock);
}
void visl_debugfs_bitstream_deinit(struct visl_dev *dev)
{
visl_debugfs_clear_bitstream(dev);
debugfs_remove_recursive(dev->bitstream_debugfs);
dev->bitstream_debugfs = NULL;
}
void visl_debugfs_deinit(struct visl_dev *dev)
{
visl_debugfs_bitstream_deinit(dev);
debugfs_remove_recursive(dev->debugfs_root);
dev->debugfs_root = NULL;
}
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