Re: [dpdk-dev] [PATCH v4 3/7] ixgbe: support l2 tunnel config

["Lu, Wenzhuo" <wenzhuo.lu@intel.com>]

Hi Shaopeng,


> -----Original Message-----
> From: He, Shaopeng
> Sent: Friday, March 4, 2016 9:47 AM
> To: Lu, Wenzhuo; dev@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH v4 3/7] ixgbe: support l2 tunnel config
> 
> Hi Wenzhuo,
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Wenzhuo Lu
> > Sent: Thursday, February 18, 2016 10:46 AM
> > To: dev@dpdk.org
> > Subject: [dpdk-dev] [PATCH v4 3/7] ixgbe: support l2 tunnel config
> >
> > Add support of l2 tunnel configuration.
> > Support modifying ether type of a type of l2 tunnel.
> > Support enabling and disabling the support of a type of l2 tunnel.
> > Only E-tag tunnel is supported now.
> >
> > Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
> > ---
> >  drivers/net/ixgbe/ixgbe_ethdev.c | 140
> > +++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 140 insertions(+)
> >
> > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > index b99e48e..b15a4b6 100644
> > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > @@ -139,6 +139,10 @@
> >  #define IXGBE_CYCLECOUNTER_MASK   0xffffffffffffffffULL
> >
> >  #define IXGBE_VT_CTL_POOLING_MODE_MASK         0x00030000
> > +#define DEFAULT_ETAG_ETYPE                     0x893f
> > +#define IXGBE_ETAG_ETYPE                       0x00005084
> > +#define IXGBE_ETAG_ETYPE_MASK                  0x0000ffff
> > +#define IXGBE_ETAG_ETYPE_VALID                 0x80000000
> >
> >  static int eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev);  static
> > int eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev); @@ -339,6
> > +343,14 @@ static int ixgbe_timesync_read_time(struct rte_eth_dev
> > *dev,
> >  				   struct timespec *timestamp);
> >  static int ixgbe_timesync_write_time(struct rte_eth_dev *dev,
> >  				   const struct timespec *timestamp);
> > +static int ixgbe_dev_l2_tunnel_eth_type_conf
> > +	(struct rte_eth_dev *dev, struct rte_eth_l2_tunnel *l2_tunnel);
> > +static int ixgbe_dev_l2_tunnel_enable
> > +	(struct rte_eth_dev *dev,
> > +	 enum rte_eth_l2_tunnel_type l2_tunnel_type); static int
> > +ixgbe_dev_l2_tunnel_disable
> > +	(struct rte_eth_dev *dev,
> > +	 enum rte_eth_l2_tunnel_type l2_tunnel_type);
> >
> >  /*
> >   * Define VF Stats MACRO for Non "cleared on read" register @@ -497,6
> > +509,9 @@ static const struct eth_dev_ops ixgbe_eth_dev_ops = {
> >  	.timesync_adjust_time = ixgbe_timesync_adjust_time,
> >  	.timesync_read_time   = ixgbe_timesync_read_time,
> >  	.timesync_write_time  = ixgbe_timesync_write_time,
> > +	.l2_tunnel_eth_type_conf = ixgbe_dev_l2_tunnel_eth_type_conf,
> > +	.l2_tunnel_enable        = ixgbe_dev_l2_tunnel_enable,
> > +	.l2_tunnel_disable       = ixgbe_dev_l2_tunnel_disable,
> >  };
> >
> >  /*
> > @@ -6201,6 +6216,131 @@ ixgbe_dev_get_dcb_info(struct rte_eth_dev
> > *dev,
> >  	return 0;
> >  }
> >
> > +/* Update e-tag ether type */
> > +static int
> > +ixgbe_update_e_tag_eth_type(struct ixgbe_hw *hw,
> > +			    uint16_t ether_type)
> > +{
> > +	uint32_t etag_etype;
> > +
> > +	if (hw->mac.type != ixgbe_mac_X550 &&
> > +	    hw->mac.type != ixgbe_mac_X550EM_x) {
> > +		return -ENOTSUP;
> > +	}
> > +
> > +	etag_etype = IXGBE_READ_REG(hw, IXGBE_ETAG_ETYPE);
> > +	etag_etype &= ~IXGBE_ETAG_ETYPE_MASK;
> > +	etag_etype |= ether_type;
> > +	IXGBE_WRITE_REG(hw, IXGBE_ETAG_ETYPE, etag_etype);
> > +	IXGBE_WRITE_FLUSH(hw);
> > +
> > +	return 0;
> > +}
> > +
> > +/* Config l2 tunnel ether type */
> > +static int
> > +ixgbe_dev_l2_tunnel_eth_type_conf(struct rte_eth_dev *dev,
> > +				  struct rte_eth_l2_tunnel *l2_tunnel) {
> > +	int ret = 0;
> > +	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data-
> > >dev_private);
> > +
> > +	if (l2_tunnel == NULL)
> > +		return -EINVAL;
> > +
> > +	switch (l2_tunnel->l2_tunnel_type) {
> > +	case RTE_L2_TUNNEL_TYPE_E_TAG:
> > +		ret = ixgbe_update_e_tag_eth_type(hw, l2_tunnel-
> > >ether_type);
> > +		break;
> > +	default:
> > +		PMD_DRV_LOG(ERR, "Invalid tunnel type");
> > +		ret = -1;
> 
> Better to use: ret = -EINVAL?
Yes, it's the bad side of copying code. I'll correct it :)

> 
> > +		break;
> > +	}
> > +
> > +	return ret;
> > +}
> > +
> > +/* Enable e-tag tunnel */
> > +static int
> > +ixgbe_e_tag_enable(struct ixgbe_hw *hw) {
> > +	uint32_t etag_etype;
> > +
> > +	if (hw->mac.type != ixgbe_mac_X550 &&
> > +	    hw->mac.type != ixgbe_mac_X550EM_x) {
> > +		return -ENOTSUP;
> > +	}
> > +
> > +	etag_etype = IXGBE_READ_REG(hw, IXGBE_ETAG_ETYPE);
> > +	etag_etype |= IXGBE_ETAG_ETYPE_VALID;
> > +	IXGBE_WRITE_REG(hw, IXGBE_ETAG_ETYPE, etag_etype);
> > +	IXGBE_WRITE_FLUSH(hw);
> > +
> > +	return 0;
> > +}
> > +
> > +/* Enable l2 tunnel */
> > +static int
> > +ixgbe_dev_l2_tunnel_enable(struct rte_eth_dev *dev,
> > +			   enum rte_eth_l2_tunnel_type l2_tunnel_type) {
> > +	int ret = 0;
> > +	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data-
> > >dev_private);
> > +
> > +	switch (l2_tunnel_type) {
> > +	case RTE_L2_TUNNEL_TYPE_E_TAG:
> > +		ret = ixgbe_e_tag_enable(hw);
> > +		break;
> > +	default:
> > +		PMD_DRV_LOG(ERR, "Invalid tunnel type");
> > +		ret = -1;
> > +		break;
> > +	}
> > +
> > +	return ret;
> > +}
> > +
> > +/* Disable e-tag tunnel */
> > +static int
> > +ixgbe_e_tag_disable(struct ixgbe_hw *hw) {
> > +	uint32_t etag_etype;
> > +
> > +	if (hw->mac.type != ixgbe_mac_X550 &&
> > +	    hw->mac.type != ixgbe_mac_X550EM_x) {
> > +		return -ENOTSUP;
> > +	}
> > +
> > +	etag_etype = IXGBE_READ_REG(hw, IXGBE_ETAG_ETYPE);
> > +	etag_etype &= ~IXGBE_ETAG_ETYPE_VALID;
> > +	IXGBE_WRITE_REG(hw, IXGBE_ETAG_ETYPE, etag_etype);
> > +	IXGBE_WRITE_FLUSH(hw);
> > +
> > +	return 0;
> > +}
> > +
> > +/* Disable l2 tunnel */
> > +static int
> > +ixgbe_dev_l2_tunnel_disable(struct rte_eth_dev *dev,
> > +			    enum rte_eth_l2_tunnel_type l2_tunnel_type) {
> > +	int ret = 0;
> > +	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data-
> > >dev_private);
> > +
> > +	switch (l2_tunnel_type) {
> > +	case RTE_L2_TUNNEL_TYPE_E_TAG:
> > +		ret = ixgbe_e_tag_disable(hw);
> > +		break;
> > +	default:
> > +		PMD_DRV_LOG(ERR, "Invalid tunnel type");
> > +		ret = -1;
> > +		break;
> > +	}
> > +
> > +	return ret;
> > +}
> > +
> >  static struct rte_driver rte_ixgbe_driver = {
> >  	.type = PMD_PDEV,
> >  	.init = rte_ixgbe_pmd_init,
> > --
> > 1.9.3