[dpdk-dev] [PATCH v4 01/24] eal: introduce one device scan

[Burakov, Anatoly]

On 26-Jun-18 8:08 AM, Qi Zhang wrote:
> When hot plug a new device, it is not necessary to scan everything
> on the bus since the devname and devargs are already there. So new
> rte_bus ops "scan_one" is introduced, bus driver can implement this
> function to simplify the hotplug process.
> 
> Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
> ---
> 

<snip>

> + *	NULL for unsuccessful scan
> + */
> +typedef struct rte_device *(*rte_bus_scan_one_t)(struct rte_devargs *devargs);
> +
> +/**
>    * Implementation specific probe function which is responsible for linking
>    * devices on that bus with applicable drivers.
>    *
> @@ -204,6 +219,7 @@ struct rte_bus {
>   	TAILQ_ENTRY(rte_bus) next;   /**< Next bus object in linked list */
>   	const char *name;            /**< Name of the bus */
>   	rte_bus_scan_t scan;         /**< Scan for devices attached to bus */
> +	rte_bus_scan_one_t scan_one; /**< Scan one device using devargs */
>   	rte_bus_probe_t probe;       /**< Probe devices on bus */
>   	rte_bus_find_device_t find_device; /**< Find a device on the bus */
>   	rte_bus_plug_t plug;         /**< Probe single device for drivers */
> 

Does changing this structure break ABI for bus drivers?

-- 
Thanks,
Anatoly