[PATCH v8 2/2] examples/vhost: unconfigure DMA vchannel

[Maxime Coquelin]

On 10/25/22 10:25, xuan.ding at intel.com wrote:
> From: Xuan Ding <xuan.ding at intel.com>
> 
> This patch applies rte_vhost_async_dma_unconfigure() to manually free
> DMA vChannels. Before unconfiguration, make sure the specified DMA
> vChannel is no longer used by any vhost ports.
> 
> Signed-off-by: Xuan Ding <xuan.ding at intel.com>
> ---
>   examples/vhost/main.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> index ac78704d79..42e53a0f9a 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -2066,6 +2066,14 @@ main(int argc, char *argv[])
>   	RTE_LCORE_FOREACH_WORKER(lcore_id)
>   		rte_eal_wait_lcore(lcore_id);
>   
> +	for (i = 0; i < dma_count; i++) {
> +		if (rte_vhost_async_dma_unconfigure(dmas_id[i], 0) < 0) {
> +			RTE_LOG(ERR, VHOST_PORT,
> +				"Failed to unconfigure DMA %d in vhost.\n", dmas_id[i]);
> +			rte_exit(EXIT_FAILURE, "Cannot use given DMA device\n");
> +		}
> +	}
> +
>   	/* clean up the EAL */
>   	rte_eal_cleanup();
>   

Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>

Thanks,
Maxime