Re: [PATCH 3/4] drm/msm: Use dma_resv locking wrappers

[Daniel Vetter <daniel@ffwll.ch>]

On Mon, Nov 25, 2019 at 10:43:55AM +0100, Daniel Vetter wrote:
> I'll add more fancy logic to them soon, so everyone really has to use
> them. Plus they already provide some nice additional debug
> infrastructure on top of direct ww_mutex usage for the fences tracked
> by dma_resv.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Rob Clark <robdclark@gmail.com>
> Cc: Sean Paul <sean@poorly.run>
> Cc: linux-arm-msm@vger.kernel.org
> Cc: freedreno@lists.freedesktop.org

Ping for some review/acks.

Thanks, Daniel

> ---
>  drivers/gpu/drm/msm/msm_gem_submit.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
> index 7d04c47d0023..385d4965a8d0 100644
> --- a/drivers/gpu/drm/msm/msm_gem_submit.c
> +++ b/drivers/gpu/drm/msm/msm_gem_submit.c
> @@ -157,7 +157,7 @@ static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
>  		msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
>  
>  	if (submit->bos[i].flags & BO_LOCKED)
> -		ww_mutex_unlock(&msm_obj->base.resv->lock);
> +		dma_resv_unlock(msm_obj->base.resv);
>  
>  	if (backoff && !(submit->bos[i].flags & BO_VALID))
>  		submit->bos[i].iova = 0;
> @@ -180,8 +180,8 @@ static int submit_lock_objects(struct msm_gem_submit *submit)
>  		contended = i;
>  
>  		if (!(submit->bos[i].flags & BO_LOCKED)) {
> -			ret = ww_mutex_lock_interruptible(&msm_obj->base.resv->lock,
> -					&submit->ticket);
> +			ret = dma_resv_lock_interruptible(msm_obj->base.resv,
> +							  &submit->ticket);
>  			if (ret)
>  				goto fail;
>  			submit->bos[i].flags |= BO_LOCKED;
> @@ -202,8 +202,8 @@ static int submit_lock_objects(struct msm_gem_submit *submit)
>  	if (ret == -EDEADLK) {
>  		struct msm_gem_object *msm_obj = submit->bos[contended].obj;
>  		/* we lost out in a seqno race, lock and retry.. */
> -		ret = ww_mutex_lock_slow_interruptible(&msm_obj->base.resv->lock,
> -				&submit->ticket);
> +		ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
> +						       &submit->ticket);
>  		if (!ret) {
>  			submit->bos[contended].flags |= BO_LOCKED;
>  			slow_locked = contended;
> -- 
> 2.24.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch