Re: [dpdk-dev] [PATCH v2 1/3] fm10k: enable FTAG based forwarding

["Chen, Jing D" <jing.d.chen@intel.com>]

Hi,

Best Regards,
Mark


> -----Original Message-----
> From: Wang, Xiao W
> Sent: Tuesday, February 02, 2016 6:50 PM
> To: Chen, Jing D
> Cc: dev@dpdk.org; Qiu, Michael; He, Shaopeng; Wang, Xiao W
> Subject: [PATCH v2 1/3] fm10k: enable FTAG based forwarding
> 
> This patch enables reading sglort info into mbuf for RX and inserting
> an FTAG at the beginning of the packet for TX. The vlan_tci_outer field
> selected from rte_mbuf structure for sglort is not used in fm10k now.
> In FTAG based forwarding mode, the switch will forward packets according
> to glort info in FTAG rather than mac and vlan table.
> 
> To activate this feature, user needs to turn
> ``CONFIG_RTE_LIBRTE_FM10K_FTAG_FWD``
> to y in common_linuxapp or common_bsdapp. Currently this feature is
> supported
> only on PF, because FM10K_PFVTCTL register is read-only for VF.
> 
> Signed-off-by: Wang Xiao W <xiao.w.wang@intel.com>
> ---
>  config/common_bsdapp               |  1 +
>  config/common_linuxapp             |  1 +
>  drivers/net/fm10k/fm10k_ethdev.c   | 12 ++++++++++++
>  drivers/net/fm10k/fm10k_rxtx.c     | 17 +++++++++++++++++
>  drivers/net/fm10k/fm10k_rxtx_vec.c |  9 +++++++++
>  5 files changed, 40 insertions(+)
> 
> diff --git a/config/common_bsdapp b/config/common_bsdapp
> index ed7c31c..451f81a 100644
> --- a/config/common_bsdapp
> +++ b/config/common_bsdapp
> @@ -208,6 +208,7 @@ CONFIG_RTE_LIBRTE_FM10K_DEBUG_TX=n
>  CONFIG_RTE_LIBRTE_FM10K_DEBUG_TX_FREE=n
>  CONFIG_RTE_LIBRTE_FM10K_DEBUG_DRIVER=n
>  CONFIG_RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE=y
> +CONFIG_RTE_LIBRTE_FM10K_FTAG_FWD=n
> 
>  #
>  # Compile burst-oriented Mellanox ConnectX-3 (MLX4) PMD
> diff --git a/config/common_linuxapp b/config/common_linuxapp
> index 74bc515..c928bce 100644
> --- a/config/common_linuxapp
> +++ b/config/common_linuxapp
> @@ -207,6 +207,7 @@ CONFIG_RTE_LIBRTE_FM10K_DEBUG_TX_FREE=n
>  CONFIG_RTE_LIBRTE_FM10K_DEBUG_DRIVER=n
>  CONFIG_RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE=y
>  CONFIG_RTE_LIBRTE_FM10K_INC_VECTOR=y
> +CONFIG_RTE_LIBRTE_FM10K_FTAG_FWD=n
> 
>  #
>  # Compile burst-oriented Mellanox ConnectX-3 (MLX4) PMD
> diff --git a/drivers/net/fm10k/fm10k_ethdev.c
> b/drivers/net/fm10k/fm10k_ethdev.c
> index e4aed94..3a15c24 100644
> --- a/drivers/net/fm10k/fm10k_ethdev.c
> +++ b/drivers/net/fm10k/fm10k_ethdev.c
> @@ -668,6 +668,18 @@ fm10k_dev_tx_init(struct rte_eth_dev *dev)
>  			PMD_INIT_LOG(ERR, "failed to disable queue %d", i);
>  			return -1;
>  		}
> +#ifdef RTE_LIBRTE_FM10K_FTAG_FWD
> +		/* Enable use of FTAG bit in TX descriptor, PFVTCTL
> +		 * register is read-only for VF.
> +		 */
> +		if (hw->mac.type == fm10k_mac_pf)
> +			FM10K_WRITE_REG(hw, FM10K_PFVTCTL(i),
> +
> 	FM10K_PFVTCTL_FTAG_DESC_ENABLE);
> +		else {
> +			PMD_INIT_LOG(ERR, "FTAG is not supported in
> VF.\n");

"\n" is not necessary.

> +			return -1;

Return "-ENOTSUP"?

> +		}
> +#endif
> 
>  		/* set location and size for descriptor ring */
>  		FM10K_WRITE_REG(hw, FM10K_TDBAL(i),