Re: [dpdk-dev] [PATCH v3 06/22] net/ena/base: destroy multiple "wait events"

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 5/6/2021 3:25 PM, Michal Krawczyk wrote:
> Although the ENA DPDK PMD doesn't have to perform any actions for
> destroying the wait event, some other platforms have to.
> 
> The macro "ENA_WAIT_EVENT_DESTROY" was renamed to
> "ENA_WAIT_EVENTS_DESTROY" and also whole implementation responsible for
> that was moved to a separate function for better readability.
> 
> Fixes: 3adcba9a8987 ("net/ena: update HAL to the newer version")
> 
> Signed-off-by: Michal Krawczyk <mk@semihalf.com>
> Reviewed-by: Igor Chauskin <igorch@amazon.com>
> Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
> ---
>  drivers/net/ena/base/ena_com.c       | 24 +++++++++++++++++-------
>  drivers/net/ena/base/ena_plat_dpdk.h |  4 ++--
>  2 files changed, 19 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/net/ena/base/ena_com.c b/drivers/net/ena/base/ena_com.c
> index 0cdeb1a2d9..d025c9cee1 100644
> --- a/drivers/net/ena/base/ena_com.c
> +++ b/drivers/net/ena/base/ena_com.c
> @@ -1671,6 +1671,22 @@ int ena_com_validate_version(struct ena_com_dev *ena_dev)
>  	return 0;
>  }
>  
> +static void
> +ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev,
> +				      struct ena_com_admin_queue *admin_queue)
> +
> +{
> +	if (!admin_queue->comp_ctx)
> +		return;
> +
> +	ENA_WAIT_EVENTS_DESTROY(admin_queue);

I can see both 'ENA_WAIT_EVENT_DESTROY' & 'ENA_WAIT_EVENTS_DESTROY' does nothing
but, according their definitions:
 +#define ENA_WAIT_EVENT_DESTROY(admin_queue) ((void)(admin_queue))
 +#define ENA_WAIT_EVENTS_DESTROY(waitqueue) ((void)(waitqueue)

If 'ENA_WAIT_EVENTS_DESTROY' also gets 'admin_queue' as parameter, does it make
sense to update the definition of it to get 'admin_queue', like:
 #define ENA_WAIT_EVENTS_DESTROY(admin_queue) ((void)(admin_queue)

And I can see that is updated in next patches, so may be better to update here.

> +	ENA_MEM_FREE(ena_dev->dmadev,
> +		     admin_queue->comp_ctx,
> +		     (admin_queue->q_depth * sizeof(struct ena_comp_ctx)));
> +
> +	admin_queue->comp_ctx = NULL;
> +}
> +
>  void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
>  {
>  	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
> @@ -1679,14 +1695,8 @@ void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
>  	struct ena_com_aenq *aenq = &ena_dev->aenq;
>  	u16 size;
>  
> -	if (admin_queue->comp_ctx) {
> -		ENA_WAIT_EVENT_DESTROY(admin_queue->comp_ctx->wait_event);
> -		ENA_MEM_FREE(ena_dev->dmadev,
> -			     admin_queue->comp_ctx,
> -			     (admin_queue->q_depth * sizeof(struct ena_comp_ctx)));
> -	}
> +	ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue);
>  
> -	admin_queue->comp_ctx = NULL;
>  	size = ADMIN_SQ_SIZE(admin_queue->q_depth);
>  	if (sq->entries)
>  		ENA_MEM_FREE_COHERENT(ena_dev->dmadev, size, sq->entries,
> diff --git a/drivers/net/ena/base/ena_plat_dpdk.h b/drivers/net/ena/base/ena_plat_dpdk.h
> index 231d44e0e0..ad7b07b374 100644
> --- a/drivers/net/ena/base/ena_plat_dpdk.h
> +++ b/drivers/net/ena/base/ena_plat_dpdk.h
> @@ -166,7 +166,7 @@ extern int ena_logtype_com;
>  #define ENA_WAIT_EVENT_SIGNAL(waitevent) pthread_cond_signal(&waitevent.cond)
>  /* pthread condition doesn't need to be rearmed after usage */
>  #define ENA_WAIT_EVENT_CLEAR(...)
> -#define ENA_WAIT_EVENT_DESTROY(waitqueue) ((void)(waitqueue))
> +#define ENA_WAIT_EVENT_DESTROY(admin_queue) ((void)(admin_queue))
>  
>  #define ena_wait_event_t ena_wait_queue_t
>  #define ENA_MIGHT_SLEEP()
> @@ -298,7 +298,7 @@ extern rte_atomic32_t ena_alloc_cnt;
>  #define ENA_TIME_EXPIRE(timeout)  (timeout < rte_get_timer_cycles())
>  #define ENA_GET_SYSTEM_TIMEOUT(timeout_us)				\
>      (timeout_us * rte_get_timer_hz() / 1000000 + rte_get_timer_cycles())
> -#define ENA_WAIT_EVENT_DESTROY(waitqueue) ((void)(waitqueue))
> +#define ENA_WAIT_EVENTS_DESTROY(waitqueue) ((void)(waitqueue))
>  
>  #ifndef READ_ONCE
>  #define READ_ONCE(var) (*((volatile typeof(var) *)(&(var))))
>