Commit c03ea34c authored by Sunil Khatri's avatar Sunil Khatri Committed by Christian König
Browse files

drm/amdgpu: add support of debugfs for mqd information 



Add debugfs support for mqd for each queue of the client.

The address exposed to debugfs could be used to dump
the mqd.

Signed-off-by: default avatarSunil Khatri <sunil.khatri@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250704075548.1549849-5-sunil.khatri@amd.com


Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
parent 719b378d

drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c

+52 −0
Original line number Diff line number Diff line
@@ -318,6 +318,9 @@ amdgpu_userq_destroy(struct drm_file *filp, int queue_id) 
		amdgpu_bo_unreserve(queue->db_obj.obj);

	}

	amdgpu_bo_unref(&queue->db_obj.obj);



	debugfs_remove_recursive(queue->debugfs_queue);



	r = amdgpu_userq_unmap_helper(uq_mgr, queue);

	amdgpu_userq_cleanup(uq_mgr, queue, queue_id);

	mutex_unlock(&uq_mgr->userq_mutex);
@@ -343,6 +346,46 @@ static int amdgpu_userq_priority_permit(struct drm_file *filp, 
	return -EACCES;

}



#if defined(CONFIG_DEBUG_FS)

static int amdgpu_mqd_info_read(struct seq_file *m, void *unused)

{

	struct amdgpu_usermode_queue *queue = m->private;

	struct amdgpu_bo *bo;

	int r;



	if (!queue || !queue->mqd.obj)

		return -EINVAL;



	bo = amdgpu_bo_ref(queue->mqd.obj);

	r = amdgpu_bo_reserve(bo, true);

	if (r) {

		amdgpu_bo_unref(&bo);

		return -EINVAL;

	}



	seq_printf(m, "queue_type %d\n", queue->queue_type);

	seq_printf(m, "mqd_gpu_address: 0x%llx\n", amdgpu_bo_gpu_offset(queue->mqd.obj));



	amdgpu_bo_unreserve(bo);

	amdgpu_bo_unref(&bo);



	return 0;

}



static int amdgpu_mqd_info_open(struct inode *inode, struct file *file)

{

	return single_open(file, amdgpu_mqd_info_read, inode->i_private);

}



static const struct file_operations amdgpu_mqd_info_fops = {

	.owner = THIS_MODULE,

	.open = amdgpu_mqd_info_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

};

#endif



static int

amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args)

{
@@ -352,6 +395,7 @@ amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args) 
	const struct amdgpu_userq_funcs *uq_funcs;

	struct amdgpu_usermode_queue *queue;

	struct amdgpu_db_info db_info;

	char *queue_name;

	bool skip_map_queue;

	uint64_t index;

	int qid, r = 0;
@@ -475,6 +519,14 @@ amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args) 
		}

	}



	queue_name = kasprintf(GFP_KERNEL, "queue-%d", qid);

	if (!queue_name)

		return -ENOMEM;



	/* Queue dentry per client to hold MQD information   */

	queue->debugfs_queue = debugfs_create_dir(queue_name, filp->debugfs_client);

	debugfs_create_file("mqd_info", 0444, queue->debugfs_queue, queue, &amdgpu_mqd_info_fops);

	kfree(queue_name);



	args->out.queue_id = qid;

drivers/gpu/drm/amd/amdgpu/amdgpu_userq.h

+1 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ struct amdgpu_usermode_queue { 
	struct dma_fence	*last_fence;

	u32			xcp_id;

	int			priority;

	struct dentry		*debugfs_queue;

};



struct amdgpu_userq_funcs {