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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Debugfs tracing for bitstream buffers. This is similar to VA-API's4 * LIBVA_TRACE_BUFDATA in that the raw bitstream can be dumped as a debugging5 * aid.6 *7 * Produces one file per OUTPUT buffer. Files are automatically cleared on8 * STREAMOFF unless the module parameter "keep_bitstream_buffers" is set.9 */10 11#include <linux/debugfs.h>12#include <linux/list.h>13#include <linux/mutex.h>14#include <media/v4l2-mem2mem.h>15 16#include "visl-debugfs.h"17 18int visl_debugfs_init(struct visl_dev *dev)19{20 dev->debugfs_root = debugfs_create_dir("visl", NULL);21 INIT_LIST_HEAD(&dev->bitstream_blobs);22 mutex_init(&dev->bitstream_lock);23 24 if (IS_ERR(dev->debugfs_root))25 return PTR_ERR(dev->debugfs_root);26 27 return visl_debugfs_bitstream_init(dev);28}29 30int visl_debugfs_bitstream_init(struct visl_dev *dev)31{32 dev->bitstream_debugfs = debugfs_create_dir("bitstream",33 dev->debugfs_root);34 if (IS_ERR(dev->bitstream_debugfs))35 return PTR_ERR(dev->bitstream_debugfs);36 37 return 0;38}39 40void visl_trace_bitstream(struct visl_ctx *ctx, struct visl_run *run)41{42 u8 *vaddr = vb2_plane_vaddr(&run->src->vb2_buf, 0);43 struct visl_blob *blob;44 size_t data_sz = vb2_get_plane_payload(&run->src->vb2_buf, 0);45 struct dentry *dentry;46 char name[32];47 48 blob = kzalloc(sizeof(*blob), GFP_KERNEL);49 if (!blob)50 return;51 52 blob->blob.data = vzalloc(data_sz);53 if (!blob->blob.data)54 goto err_vmalloc;55 56 blob->blob.size = data_sz;57 snprintf(name, 32, "bitstream%d", run->src->sequence);58 59 memcpy(blob->blob.data, vaddr, data_sz);60 61 dentry = debugfs_create_blob(name, 0444, ctx->dev->bitstream_debugfs,62 &blob->blob);63 if (IS_ERR(dentry))64 goto err_debugfs;65 66 blob->dentry = dentry;67 68 mutex_lock(&ctx->dev->bitstream_lock);69 list_add_tail(&blob->list, &ctx->dev->bitstream_blobs);70 mutex_unlock(&ctx->dev->bitstream_lock);71 72 return;73 74err_debugfs:75 vfree(blob->blob.data);76err_vmalloc:77 kfree(blob);78}79 80void visl_debugfs_clear_bitstream(struct visl_dev *dev)81{82 struct visl_blob *blob;83 struct visl_blob *tmp;84 85 mutex_lock(&dev->bitstream_lock);86 if (list_empty(&dev->bitstream_blobs))87 goto unlock;88 89 list_for_each_entry_safe(blob, tmp, &dev->bitstream_blobs, list) {90 list_del(&blob->list);91 debugfs_remove(blob->dentry);92 vfree(blob->blob.data);93 kfree(blob);94 }95 96unlock:97 mutex_unlock(&dev->bitstream_lock);98}99 100void visl_debugfs_bitstream_deinit(struct visl_dev *dev)101{102 visl_debugfs_clear_bitstream(dev);103 debugfs_remove_recursive(dev->bitstream_debugfs);104 dev->bitstream_debugfs = NULL;105}106 107void visl_debugfs_deinit(struct visl_dev *dev)108{109 visl_debugfs_bitstream_deinit(dev);110 debugfs_remove_recursive(dev->debugfs_root);111 dev->debugfs_root = NULL;112}113