From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [RFC PATCH 1/2] Added ETH_SPEED_CAP bitmap in
 rte_eth_dev_info
Date: Mon, 25 May 2015 10:46:49 -0700
Message-ID: <20150525104649.06f1916c@urahara>
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To: Marc Sune <marc.sune@bisdn.de>
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On Tue, 12 May 2015 01:45:45 +0200
Marc Sune <marc.sune@bisdn.de> wrote:

> +/**
> + * Ethernet device information
> + */
>  struct rte_eth_dev_info {
>  	struct rte_pci_device *pci_dev; /**< Device PCI information. */
>  	const char *driver_name; /**< Device Driver name. */
> @@ -924,6 +947,7 @@ struct rte_eth_dev_info {
>  	uint16_t vmdq_queue_base; /**< First queue ID for VMDQ pools. */
>  	uint16_t vmdq_queue_num;  /**< Queue number for VMDQ pools. */
>  	uint16_t vmdq_pool_base;  /**< First ID of VMDQ pools. */
> +	uint16_t speed_capa;  /**< Supported speeds bitmap. */

Since you are likely to run out of 16 bits in future, why not 32 bits now?