Re: [PATCH v10 05/11] drm/shmem: Switch to use drm_* debug helpers

[Thomas Zimmermann <tzimmermann@suse.de>]

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Am 08.01.23 um 22:04 schrieb Dmitry Osipenko:
> Ease debugging of a multi-GPU system by using drm_WARN_*() and
> drm_dbg_kms() helpers that print out DRM device name corresponding
> to shmem GEM.
> 
> Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/drm_gem_shmem_helper.c | 38 +++++++++++++++-----------
>   1 file changed, 22 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index f21f47737817..5006f7da7f2d 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -141,7 +141,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem)
>   {
>   	struct drm_gem_object *obj = &shmem->base;
>   
> -	WARN_ON(shmem->vmap_use_count);
> +	drm_WARN_ON(obj->dev, shmem->vmap_use_count);
>   
>   	if (obj->import_attach) {
>   		drm_prime_gem_destroy(obj, shmem->sgt);
> @@ -156,7 +156,7 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem)
>   			drm_gem_shmem_put_pages(shmem);
>   	}
>   
> -	WARN_ON(shmem->pages_use_count);
> +	drm_WARN_ON(obj->dev, shmem->pages_use_count);
>   
>   	drm_gem_object_release(obj);
>   	mutex_destroy(&shmem->pages_lock);
> @@ -175,7 +175,8 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem)
>   
>   	pages = drm_gem_get_pages(obj);
>   	if (IS_ERR(pages)) {
> -		DRM_DEBUG_KMS("Failed to get pages (%ld)\n", PTR_ERR(pages));
> +		drm_dbg_kms(obj->dev, "Failed to get pages (%ld)\n",
> +			    PTR_ERR(pages));
>   		shmem->pages_use_count = 0;
>   		return PTR_ERR(pages);
>   	}
> @@ -207,9 +208,10 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem)
>    */
>   int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem)
>   {
> +	struct drm_gem_object *obj = &shmem->base;
>   	int ret;
>   
> -	WARN_ON(shmem->base.import_attach);
> +	drm_WARN_ON(obj->dev, obj->import_attach);
>   
>   	ret = mutex_lock_interruptible(&shmem->pages_lock);
>   	if (ret)
> @@ -225,7 +227,7 @@ static void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem)
>   {
>   	struct drm_gem_object *obj = &shmem->base;
>   
> -	if (WARN_ON_ONCE(!shmem->pages_use_count))
> +	if (drm_WARN_ON_ONCE(obj->dev, !shmem->pages_use_count))
>   		return;
>   
>   	if (--shmem->pages_use_count > 0)
> @@ -268,7 +270,9 @@ EXPORT_SYMBOL(drm_gem_shmem_put_pages);
>    */
>   int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem)
>   {
> -	WARN_ON(shmem->base.import_attach);
> +	struct drm_gem_object *obj = &shmem->base;
> +
> +	drm_WARN_ON(obj->dev, obj->import_attach);
>   
>   	return drm_gem_shmem_get_pages(shmem);
>   }
> @@ -283,7 +287,9 @@ EXPORT_SYMBOL(drm_gem_shmem_pin);
>    */
>   void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem)
>   {
> -	WARN_ON(shmem->base.import_attach);
> +	struct drm_gem_object *obj = &shmem->base;
> +
> +	drm_WARN_ON(obj->dev, obj->import_attach);
>   
>   	drm_gem_shmem_put_pages(shmem);
>   }
> @@ -303,7 +309,7 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem,
>   	if (obj->import_attach) {
>   		ret = dma_buf_vmap(obj->import_attach->dmabuf, map);
>   		if (!ret) {
> -			if (WARN_ON(map->is_iomem)) {
> +			if (drm_WARN_ON(obj->dev, map->is_iomem)) {
>   				dma_buf_vunmap(obj->import_attach->dmabuf, map);
>   				ret = -EIO;
>   				goto err_put_pages;
> @@ -328,7 +334,7 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem,
>   	}
>   
>   	if (ret) {
> -		DRM_DEBUG_KMS("Failed to vmap pages, error %d\n", ret);
> +		drm_dbg_kms(obj->dev, "Failed to vmap pages, error %d\n", ret);
>   		goto err_put_pages;
>   	}
>   
> @@ -378,7 +384,7 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem,
>   {
>   	struct drm_gem_object *obj = &shmem->base;
>   
> -	if (WARN_ON_ONCE(!shmem->vmap_use_count))
> +	if (drm_WARN_ON_ONCE(obj->dev, !shmem->vmap_use_count))
>   		return;
>   
>   	if (--shmem->vmap_use_count > 0)
> @@ -463,7 +469,7 @@ void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem)
>   	struct drm_gem_object *obj = &shmem->base;
>   	struct drm_device *dev = obj->dev;
>   
> -	WARN_ON(!drm_gem_shmem_is_purgeable(shmem));
> +	drm_WARN_ON(obj->dev, !drm_gem_shmem_is_purgeable(shmem));
>   
>   	dma_unmap_sgtable(dev->dev, shmem->sgt, DMA_BIDIRECTIONAL, 0);
>   	sg_free_table(shmem->sgt);
> @@ -555,7 +561,7 @@ static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf)
>   	mutex_lock(&shmem->pages_lock);
>   
>   	if (page_offset >= num_pages ||
> -	    WARN_ON_ONCE(!shmem->pages) ||
> +	    drm_WARN_ON_ONCE(obj->dev, !shmem->pages) ||
>   	    shmem->madv < 0) {
>   		ret = VM_FAULT_SIGBUS;
>   	} else {
> @@ -574,7 +580,7 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma)
>   	struct drm_gem_object *obj = vma->vm_private_data;
>   	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
>   
> -	WARN_ON(shmem->base.import_attach);
> +	drm_WARN_ON(obj->dev, obj->import_attach);
>   
>   	mutex_lock(&shmem->pages_lock);
>   
> @@ -583,7 +589,7 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma)
>   	 * mmap'd, vm_open() just grabs an additional reference for the new
>   	 * mm the vma is getting copied into (ie. on fork()).
>   	 */
> -	if (!WARN_ON_ONCE(!shmem->pages_use_count))
> +	if (!drm_WARN_ON_ONCE(obj->dev, !shmem->pages_use_count))
>   		shmem->pages_use_count++;
>   
>   	mutex_unlock(&shmem->pages_lock);
> @@ -677,7 +683,7 @@ struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem)
>   {
>   	struct drm_gem_object *obj = &shmem->base;
>   
> -	WARN_ON(shmem->base.import_attach);
> +	drm_WARN_ON(obj->dev, obj->import_attach);
>   
>   	return drm_prime_pages_to_sg(obj->dev, shmem->pages, obj->size >> PAGE_SHIFT);
>   }
> @@ -708,7 +714,7 @@ struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem)
>   	if (shmem->sgt)
>   		return shmem->sgt;
>   
> -	WARN_ON(obj->import_attach);
> +	drm_WARN_ON(obj->dev, obj->import_attach);
>   
>   	ret = drm_gem_shmem_get_pages(shmem);
>   	if (ret)

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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