linux-kernel - Re: [PATCH 2/7] staging/android: display sync

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Date:	Mon, 8 Aug 2016 11:34:47 +0200
From:	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
To:	Gustavo Padovan <gustavo@...ovan.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	dri-devel@...ts.freedesktop.org,
	Daniel Stone <daniels@...labora.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Riley Andrews <riandrews@...roid.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	Greg Hackmann <ghackmann@...gle.com>,
	John Harrison <John.C.Harrison@...el.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: Re: [PATCH 2/7] staging/android: display sync_pt name on debugfs

Op 20-06-16 om 17:53 schreef Gustavo Padovan:
> From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
>
> When creating a sync_pt the name received wasn't used anywhere.
> Now we add it to the sync info debug output to make it easier to indetify
> the userspace name of that sync pt.
>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
> ---
>  drivers/staging/android/sw_sync.c    | 16 ++++------------
>  drivers/staging/android/sync_debug.c |  5 +++--
>  drivers/staging/android/sync_debug.h |  9 +++++++++
>  3 files changed, 16 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/staging/android/sw_sync.c b/drivers/staging/android/sw_sync.c
> index b4ae092..ea27512 100644
> --- a/drivers/staging/android/sw_sync.c
> +++ b/drivers/staging/android/sw_sync.c
> @@ -37,15 +37,6 @@ struct sw_sync_create_fence_data {
>  		struct sw_sync_create_fence_data)
>  #define SW_SYNC_IOC_INC			_IOW(SW_SYNC_IOC_MAGIC, 1, __u32)
>  
> -static const struct fence_ops timeline_fence_ops;
> -
> -static inline struct sync_pt *fence_to_sync_pt(struct fence *fence)
> -{
> -	if (fence->ops != &timeline_fence_ops)
> -		return NULL;
> -	return container_of(fence, struct sync_pt, base);
> -}
> -
>  struct sync_timeline *sync_timeline_create(const char *name)
>  {
>  	struct sync_timeline *obj;
> @@ -108,7 +99,7 @@ static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
>  }
>  
>  static struct sync_pt *sync_pt_create(struct sync_timeline *obj, int size,
> -			     unsigned int value)
> +			     unsigned int value, char *name)
>  {
>  	unsigned long flags;
>  	struct sync_pt *pt;
> @@ -120,6 +111,7 @@ static struct sync_pt *sync_pt_create(struct sync_timeline *obj, int size,
>  	if (!pt)
>  		return NULL;
>  
> +	strlcpy(pt->name, name, sizeof(pt->name));
>  	spin_lock_irqsave(&obj->child_list_lock, flags);
>  	sync_timeline_get(obj);
>  	fence_init(&pt->base, &timeline_fence_ops, &obj->child_list_lock,
> @@ -191,7 +183,7 @@ static void timeline_fence_timeline_value_str(struct fence *fence,
>  	snprintf(str, size, "%d", parent->value);
>  }
>  
> -static const struct fence_ops timeline_fence_ops = {
> +const struct fence_ops timeline_fence_ops = {
>  	.get_driver_name = timeline_fence_get_driver_name,
>  	.get_timeline_name = timeline_fence_get_timeline_name,
>  	.enable_signaling = timeline_fence_enable_signaling,
> @@ -252,7 +244,7 @@ static long sw_sync_ioctl_create_fence(struct sync_timeline *obj,
>  		goto err;
>  	}
>  
> -	pt = sync_pt_create(obj, sizeof(*pt), data.value);
> +	pt = sync_pt_create(obj, sizeof(*pt), data.value, data.name);
>  	if (!pt) {
>  		err = -ENOMEM;
>  		goto err;
> diff --git a/drivers/staging/android/sync_debug.c b/drivers/staging/android/sync_debug.c
> index 4c5a855..b732ea3 100644
> --- a/drivers/staging/android/sync_debug.c
> +++ b/drivers/staging/android/sync_debug.c
> @@ -75,13 +75,14 @@ static void sync_print_fence(struct seq_file *s, struct fence *fence, bool show)
>  {
>  	int status = 1;
>  	struct sync_timeline *parent = fence_parent(fence);
> +	struct sync_pt *pt = fence_to_sync_pt(fence);
>  
>  	if (fence_is_signaled_locked(fence))
>  		status = fence->status;
>  
> -	seq_printf(s, "  %s%sfence %s",
> +	seq_printf(s, "  %s%sfence %s %s",
>  		   show ? parent->name : "",
> -		   show ? "_" : "",
> +		   show ? "_" : "", pt->name,
>  		   sync_status_str(status));
>  
NAK,
A fence in sync_print_fence can be of any type. If you want to print the name, use the fence_value_str callback.

~Maarten