[dpdk-dev] ixgbe: fix compilation issue when RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC is disabled

  If RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC is disabled in the config file,
RTE_PMD_IXGBE_RX_MAX_BURST macro and ixgbe_recv_pkts_bulk_alloc function are not declared,
and some parts of the ixgbe code were still trying to use them.

This patch fixes the problem by including previous conditionals
that were removed in 01fa1d6 ("ixgbe: unify Rx setup").

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---
 lib/librte_pmd_ixgbe/ixgbe_rxtx.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
  

On Thu, 19 Mar 2015 12:24:38 +0000
Pablo de Lara <pablo.de.lara.guarch@intel.com> wrote:

> If RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC is disabled in the config file,
> RTE_PMD_IXGBE_RX_MAX_BURST macro and ixgbe_recv_pkts_bulk_alloc function are not declared,
> and some parts of the ixgbe code were still trying to use them.
> 
> This patch fixes the problem by including previous conditionals
> that were removed in 01fa1d6 ("ixgbe: unify Rx setup").
> 
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
> ---
>  lib/librte_pmd_ixgbe/ixgbe_rxtx.c |   15 ++++++++++++---
>  1 files changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
> index 8bede22..011e97c 100644
> --- a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
> +++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
> @@ -2075,7 +2075,7 @@ check_rx_burst_bulk_alloc_preconditions(__rte_unused struct ixgbe_rx_queue *rxq)
>  
>  /* Reset dynamic ixgbe_rx_queue fields back to defaults */
>  static void
> -ixgbe_reset_rx_queue(struct ixgbe_hw *hw, struct ixgbe_rx_queue *rxq)
> +ixgbe_reset_rx_queue(struct ixgbe_hw *hw __rte_unused, struct ixgbe_rx_queue *rxq)
>  {
>  	static const union ixgbe_adv_rx_desc zeroed_desc = { .read = {
>  			.pkt_addr = 0}};
> @@ -2092,9 +2092,11 @@ ixgbe_reset_rx_queue(struct ixgbe_hw *hw, struct ixgbe_rx_queue *rxq)
>  	 * constraints here to see if we need to zero out memory after the end
>  	 * of the H/W descriptor ring.
>  	 */
> +#ifdef RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC
>  	if (hw->rx_bulk_alloc_allowed)
>  		/* zero out extra memory */
>  		len += RTE_PMD_IXGBE_RX_MAX_BURST;
> +#endif
>  
>  	/*
>  	 * Zero out HW ring memory. Zero out extra memory at the end of
> @@ -2238,8 +2240,10 @@ ixgbe_dev_rx_queue_setup(struct rte_eth_dev *dev,
>  	 * function does not access an invalid memory region.
>  	 */
>  	len = nb_desc;
> +#ifdef RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC
>  	if (hw->rx_bulk_alloc_allowed)
>  		len += RTE_PMD_IXGBE_RX_MAX_BURST;
> +#endif
>  
>  	rxq->sw_ring = rte_zmalloc_socket("rxq->sw_ring",
>  					  sizeof(struct ixgbe_rx_entry) * len,
> @@ -3544,14 +3548,19 @@ void ixgbe_set_rx_function(struct rte_eth_dev *dev)
>  				   "burst size no less than 32.");
>  
>  		dev->rx_pkt_burst = ixgbe_recv_pkts_vec;
> -	} else if (hw->rx_bulk_alloc_allowed) {
> +
> +	}
> +#ifdef RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC
> +	else if (hw->rx_bulk_alloc_allowed) {
>  		PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are "
>  				    "satisfied. Rx Burst Bulk Alloc function "
>  				    "will be used on port=%d.",
>  			     dev->data->port_id);
>  
>  		dev->rx_pkt_burst = ixgbe_recv_pkts_bulk_alloc;
> -	} else {
> +	}
> +#endif
> +	else {
>  		PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are not "
>  				    "satisfied, or Scattered Rx is requested, "
>  				    "or RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC "

This code needs some 'de-ifdef' work. It is hard to maintain as is.
I prefer having one inline function, and getting rid of all the #ifdef's
and just let the compiler eliminate dead code.