Re: [dpdk-dev] [PATCH v5 1/3] ixgbe: Cleanups

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vlad Zolotarov
> Sent: Monday, March 09, 2015 10:21 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH v5 1/3] ixgbe: Cleanups
> 
>    - Removed the not needed casting.
>    - ixgbe_dev_rx_init(): shorten the lines by defining a local alias variable to access
>                           &dev->data->dev_conf.rxmode.
> 
> Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>
> ---
>  lib/librte_pmd_ixgbe/ixgbe_rxtx.c | 27 ++++++++++++---------------
>  1 file changed, 12 insertions(+), 15 deletions(-)
> 
> diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
> index 72c65df..609b5fd 100644
> --- a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
> +++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
> @@ -1032,8 +1032,7 @@ ixgbe_rx_alloc_bufs(struct igb_rx_queue *rxq)
>  	int diag, i;
> 
>  	/* allocate buffers in bulk directly into the S/W ring */
> -	alloc_idx = (uint16_t)(rxq->rx_free_trigger -
> -				(rxq->rx_free_thresh - 1));
> +	alloc_idx = rxq->rx_free_trigger - (rxq->rx_free_thresh - 1);

I think all these extra casts came in to keep icc 12.* compiling without warnings.
I am agree that they are unnecessary.
Though if we still have to support icc 12.* we either need to keep them, or find
some other way to keep it happy.
Konstantin  

>  	rxep = &rxq->sw_ring[alloc_idx];
>  	diag = rte_mempool_get_bulk(rxq->mb_pool, (void *)rxep,
>  				    rxq->rx_free_thresh);
> @@ -1061,10 +1060,9 @@ ixgbe_rx_alloc_bufs(struct igb_rx_queue *rxq)
>  	IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, rxq->rx_free_trigger);
> 
>  	/* update state of internal queue structure */
> -	rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_trigger +
> -						rxq->rx_free_thresh);
> +	rxq->rx_free_trigger = rxq->rx_free_trigger + rxq->rx_free_thresh;
>  	if (rxq->rx_free_trigger >= rxq->nb_rx_desc)
> -		rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_thresh - 1);
> +		rxq->rx_free_trigger = rxq->rx_free_thresh - 1;
> 
>  	/* no errors */
>  	return 0;
> @@ -3560,6 +3558,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  	uint32_t rxcsum;
>  	uint16_t buf_size;
>  	uint16_t i;
> +	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> 
>  	PMD_INIT_FUNC_TRACE();
>  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> @@ -3582,7 +3581,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  	 * Configure CRC stripping, if any.
>  	 */
>  	hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
> -	if (dev->data->dev_conf.rxmode.hw_strip_crc)
> +	if (rx_conf->hw_strip_crc)
>  		hlreg0 |= IXGBE_HLREG0_RXCRCSTRP;
>  	else
>  		hlreg0 &= ~IXGBE_HLREG0_RXCRCSTRP;
> @@ -3590,11 +3589,11 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  	/*
>  	 * Configure jumbo frame support, if any.
>  	 */
> -	if (dev->data->dev_conf.rxmode.jumbo_frame == 1) {
> +	if (rx_conf->jumbo_frame == 1) {
>  		hlreg0 |= IXGBE_HLREG0_JUMBOEN;
>  		maxfrs = IXGBE_READ_REG(hw, IXGBE_MAXFRS);
>  		maxfrs &= 0x0000FFFF;
> -		maxfrs |= (dev->data->dev_conf.rxmode.max_rx_pkt_len << 16);
> +		maxfrs |= (rx_conf->max_rx_pkt_len << 16);
>  		IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, maxfrs);
>  	} else
>  		hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
> @@ -3618,9 +3617,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  		 * Reset crc_len in case it was changed after queue setup by a
>  		 * call to configure.
>  		 */
> -		rxq->crc_len = (uint8_t)
> -				((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 :
> -				ETHER_CRC_LEN);
> +		rxq->crc_len = rx_conf->hw_strip_crc ? 0 : ETHER_CRC_LEN;
> 
>  		/* Setup the Base and Length of the Rx Descriptor Rings */
>  		bus_addr = rxq->rx_ring_phys_addr;
> @@ -3638,7 +3635,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  		/*
>  		 * Configure Header Split
>  		 */
> -		if (dev->data->dev_conf.rxmode.header_split) {
> +		if (rx_conf->header_split) {
>  			if (hw->mac.type == ixgbe_mac_82599EB) {
>  				/* Must setup the PSRTYPE register */
>  				uint32_t psrtype;
> @@ -3648,7 +3645,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  					IXGBE_PSRTYPE_IPV6HDR;
>  				IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(rxq->reg_idx), psrtype);
>  			}
> -			srrctl = ((dev->data->dev_conf.rxmode.split_hdr_size <<
> +			srrctl = ((rx_conf->split_hdr_size <<
>  				IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
>  				IXGBE_SRRCTL_BSIZEHDR_MASK);
>  			srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
> @@ -3699,7 +3696,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  	 */
>  	rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
>  	rxcsum |= IXGBE_RXCSUM_PCSD;
> -	if (dev->data->dev_conf.rxmode.hw_ip_checksum)
> +	if (rx_conf->hw_ip_checksum)
>  		rxcsum |= IXGBE_RXCSUM_IPPCSE;
>  	else
>  		rxcsum &= ~IXGBE_RXCSUM_IPPCSE;
> @@ -3709,7 +3706,7 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>  	if (hw->mac.type == ixgbe_mac_82599EB ||
>  	    hw->mac.type == ixgbe_mac_X540) {
>  		rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
> -		if (dev->data->dev_conf.rxmode.hw_strip_crc)
> +		if (rx_conf->hw_strip_crc)
>  			rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
>  		else
>  			rdrxctl &= ~IXGBE_RDRXCTL_CRCSTRIP;
> --
> 2.1.0