linux-kernel - Re: [PATCH v15 02/19] drm/etnaviv: Export drm_gem_print

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Message-ID: <45d134bbd77a53de225b7bef55c73778bb7dc993.camel@pengutronix.de>
Date: Tue, 01 Oct 2024 15:10:14 +0200
From: Lucas Stach <l.stach@...gutronix.de>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>
Cc: Christian Gmeiner <christian.gmeiner@...il.com>, Russell King
	 <linux+etnaviv@...linux.org.uk>, dri-devel@...ts.freedesktop.org, 
	etnaviv@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 02/19] drm/etnaviv: Export drm_gem_print_info() and
 use it

Am Sonntag, dem 08.09.2024 um 17:43 +0800 schrieb Sui Jingfeng:
> This will make the newly implemented etnaviv_gem_object_funcs::print_info
> get in use, which improves code sharing and simplifies debugfs. Achieve
> better humen readability for debug log.
> 
> Use container_of_const() if 'struct etnaviv_gem_object *etnaviv_obj' is a
> constant pointer.
> 
> Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
> ---
>  drivers/gpu/drm/drm_gem.c             |  1 +
>  drivers/gpu/drm/etnaviv/etnaviv_gem.c | 13 +++++--------
>  include/drm/drm_gem.h                 |  2 ++
>  3 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
> index d4bbc5d109c8..9c5c971c1b23 100644
> --- a/drivers/gpu/drm/drm_gem.c
> +++ b/drivers/gpu/drm/drm_gem.c
> @@ -1160,6 +1160,7 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
>  	if (obj->funcs->print_info)
>  		obj->funcs->print_info(p, indent, obj);
>  }
> +EXPORT_SYMBOL(drm_gem_print_info);

This needs to be a separate patch. I don't think I can take such a
change intermingled with etnaviv changes in the same patch. This needs
some acks from DRM core.

Regards,
Lucas

>  
>  int drm_gem_pin_locked(struct drm_gem_object *obj)
>  {
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> index 543d881585b3..6bdf72cd9e85 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> @@ -3,6 +3,7 @@
>   * Copyright (C) 2015-2018 Etnaviv Project
>   */
>  
> +#include <drm/drm_gem.h>
>  #include <drm/drm_prime.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/shmem_fs.h>
> @@ -432,15 +433,11 @@ int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
>  #ifdef CONFIG_DEBUG_FS
>  static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
>  {
> -	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
> +	struct drm_printer p = drm_seq_file_printer(m);
>  	struct dma_resv *robj = obj->resv;
> -	unsigned long off = drm_vma_node_start(&obj->vma_node);
>  	int r;
>  
> -	seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n",
> -			etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I',
> -			obj->name, kref_read(&obj->refcount),
> -			off, etnaviv_obj->vaddr, obj->size);
> +	drm_gem_print_info(&p, 1, obj);
>  
>  	r = dma_resv_lock(robj, NULL);
>  	if (r)
> @@ -461,7 +458,7 @@ void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
>  	list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) {
>  		struct drm_gem_object *obj = &etnaviv_obj->base;
>  
> -		seq_puts(m, "   ");
> +		seq_printf(m, "obj[%d]:\n", count);
>  		etnaviv_gem_describe(obj, m);
>  		count++;
>  		size += obj->size;
> @@ -556,7 +553,7 @@ static void etnaviv_gem_object_info(struct drm_printer *p,
>  {
>  	const struct etnaviv_gem_object *etnaviv_obj;
>  
> -	etnaviv_obj = container_of(obj, struct etnaviv_gem_object, base);
> +	etnaviv_obj = container_of_const(obj, struct etnaviv_gem_object, base);
>  
>  	drm_printf_indent(p, indent, "caching mode=%s\n",
>  			  etnaviv_gem_obj_caching_info(etnaviv_obj->flags));
> diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
> index bae4865b2101..0791566fab53 100644
> --- a/include/drm/drm_gem.h
> +++ b/include/drm/drm_gem.h
> @@ -480,6 +480,8 @@ void drm_gem_vm_close(struct vm_area_struct *vma);
>  int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
>  		     struct vm_area_struct *vma);
>  int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> +void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
> +			const struct drm_gem_object *obj);
>  
>  /**
>   * drm_gem_object_get - acquire a GEM buffer object reference