[dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[David Harton]

Currently, if requested MTU is bigger than mbuf size and scattered
receive is not enabled, setting MTU to that value fails.

This patch allows setting this special MTU when device is stopped,
because scattered_rx will be re-configured during next port start
and driver may enable scattered receive according new MTU value.

After this patch, driver may select different receive function
automatically after MTU set, according MTU values selected.

Signed-off-by: David Harton <dharton@cisco.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index feec85634..0b962c8db 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 {
 	struct ixgbe_hw *hw;
 	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
-	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
+	struct rte_eth_dev_data *dev_data = dev->data;
 
 	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 
 	if ((mtu < ETHER_MIN_MTU) || (max_frame > ETHER_MAX_JUMBO_FRAME_LEN))
 		return -EINVAL;
 
-	/* refuse mtu that requires the support of scattered packets when this
-	 * feature has not been enabled before.
+	/* If device is started, refuse mtu that requires the support of
+	 * scattered packets when this feature has not been enabled before.
 	 */
-	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
+	if (dev_data->dev_started && !dev_data->scattered_rx &&
 	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
-	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
+	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
+		PMD_INIT_LOG(ERR, "Stop port first.");
 		return -EINVAL;
+	}
 
 	/*
 	 * When supported by the underlying PF driver, use the IXGBE_VF_SET_MTU
-- 
2.19.1

[dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[David Harton]

Currently, if requested MTU is bigger than mbuf size and scattered
receive is not enabled, setting MTU to that value fails.

This patch allows setting this special MTU when device is stopped,
because scattered_rx will be re-configured during next port start
and driver may enable scattered receive according new MTU value.

After this patch, driver may select different receive function
automatically after MTU set, according MTU values selected.

Signed-off-by: David Harton <dharton@cisco.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index feec85634..0b962c8db 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 {
 	struct ixgbe_hw *hw;
 	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
-	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
+	struct rte_eth_dev_data *dev_data = dev->data;
 
 	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 
 	if ((mtu < ETHER_MIN_MTU) || (max_frame > ETHER_MAX_JUMBO_FRAME_LEN))
 		return -EINVAL;
 
-	/* refuse mtu that requires the support of scattered packets when this
-	 * feature has not been enabled before.
+	/* If device is started, refuse mtu that requires the support of
+	 * scattered packets when this feature has not been enabled before.
 	 */
-	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
+	if (dev_data->dev_started && !dev_data->scattered_rx &&
 	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
-	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
+	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
+		PMD_INIT_LOG(ERR, "Stop port first.");
 		return -EINVAL;
+	}
 
 	/*
 	 * When supported by the underlying PF driver, use the IXGBE_VF_SET_MTU
-- 
2.19.1

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[Zhao1, Wei]

HI, 

Why not add some more code 
"
	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
		dev->data->scattered_rx = 1;
" 

Into ixgbevf_dev_rx_init() to enable scatter mode when start device?


Reviewed-by: Wei Zhao <wei.zhao1@intel.com>


> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> Sent: Wednesday, April 3, 2019 9:19 AM
> To: dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> Currently, if requested MTU is bigger than mbuf size and scattered receive is
> not enabled, setting MTU to that value fails.
> 
> This patch allows setting this special MTU when device is stopped, because
> scattered_rx will be re-configured during next port start and driver may
> enable scattered receive according new MTU value.
> 
> After this patch, driver may select different receive function automatically
> after MTU set, according MTU values selected.
> 
> Signed-off-by: David Harton <dharton@cisco.com>
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> b/drivers/net/ixgbe/ixgbe_ethdev.c
> index feec85634..0b962c8db 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev,
> uint16_t mtu)  {
>  	struct ixgbe_hw *hw;
>  	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
> -	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> +	struct rte_eth_dev_data *dev_data = dev->data;
> 
>  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> 
>  	if ((mtu < ETHER_MIN_MTU) || (max_frame >
> ETHER_MAX_JUMBO_FRAME_LEN))
>  		return -EINVAL;
> 
> -	/* refuse mtu that requires the support of scattered packets when
> this
> -	 * feature has not been enabled before.
> +	/* If device is started, refuse mtu that requires the support of
> +	 * scattered packets when this feature has not been enabled before.
>  	 */
> -	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
> +	if (dev_data->dev_started && !dev_data->scattered_rx &&
>  	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
> -	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
> +	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
> +		PMD_INIT_LOG(ERR, "Stop port first.");
>  		return -EINVAL;
> +	}
> 
>  	/*
>  	 * When supported by the underlying PF driver, use the
> IXGBE_VF_SET_MTU
> --
> 2.19.1

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[Zhao1, Wei]

HI, 

Why not add some more code 
"
	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
		dev->data->scattered_rx = 1;
" 

Into ixgbevf_dev_rx_init() to enable scatter mode when start device?


Reviewed-by: Wei Zhao <wei.zhao1@intel.com>


> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> Sent: Wednesday, April 3, 2019 9:19 AM
> To: dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> Currently, if requested MTU is bigger than mbuf size and scattered receive is
> not enabled, setting MTU to that value fails.
> 
> This patch allows setting this special MTU when device is stopped, because
> scattered_rx will be re-configured during next port start and driver may
> enable scattered receive according new MTU value.
> 
> After this patch, driver may select different receive function automatically
> after MTU set, according MTU values selected.
> 
> Signed-off-by: David Harton <dharton@cisco.com>
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> b/drivers/net/ixgbe/ixgbe_ethdev.c
> index feec85634..0b962c8db 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev,
> uint16_t mtu)  {
>  	struct ixgbe_hw *hw;
>  	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
> -	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> +	struct rte_eth_dev_data *dev_data = dev->data;
> 
>  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> 
>  	if ((mtu < ETHER_MIN_MTU) || (max_frame >
> ETHER_MAX_JUMBO_FRAME_LEN))
>  		return -EINVAL;
> 
> -	/* refuse mtu that requires the support of scattered packets when
> this
> -	 * feature has not been enabled before.
> +	/* If device is started, refuse mtu that requires the support of
> +	 * scattered packets when this feature has not been enabled before.
>  	 */
> -	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
> +	if (dev_data->dev_started && !dev_data->scattered_rx &&
>  	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
> -	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
> +	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
> +		PMD_INIT_LOG(ERR, "Stop port first.");
>  		return -EINVAL;
> +	}
> 
>  	/*
>  	 * When supported by the underlying PF driver, use the
> IXGBE_VF_SET_MTU
> --
> 2.19.1

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[David Harton (dharton)]

Hi,

> -----Original Message-----
> From: Zhao1, Wei <wei.zhao1@intel.com>
> Sent: Tuesday, April 02, 2019 10:26 PM
> To: David Harton (dharton) <dharton@cisco.com>; dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> HI,
> 
> Why not add some more code
> "
> 	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
> 		dev->data->scattered_rx = 1;
> "
> 
> Into ixgbevf_dev_rx_init() to enable scatter mode when start device?

I don't think it's necessary is it?

Doesn't this code in ixgbevf_dev_rx_init() handle it?

        if (rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ||
            /* It adds dual VLAN length for supporting dual VLAN */
            (rxmode->max_rx_pkt_len +
                2 * IXGBE_VLAN_TAG_SIZE) > buf_size) {
            if (!dev->data->scattered_rx)
                PMD_INIT_LOG(DEBUG, "forcing scatter mode");
            dev->data->scattered_rx = 1;
        }

Regards,
Dave

> 
> 
> Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> > Sent: Wednesday, April 3, 2019 9:19 AM
> > To: dev@dpdk.org
> > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> > Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> >
> > Currently, if requested MTU is bigger than mbuf size and scattered
> > receive is not enabled, setting MTU to that value fails.
> >
> > This patch allows setting this special MTU when device is stopped,
> > because scattered_rx will be re-configured during next port start and
> > driver may enable scattered receive according new MTU value.
> >
> > After this patch, driver may select different receive function
> > automatically after MTU set, according MTU values selected.
> >
> > Signed-off-by: David Harton <dharton@cisco.com>
> > ---
> >  drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
> >  1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > index feec85634..0b962c8db 100644
> > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > @@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev,
> > uint16_t mtu)  {
> >  	struct ixgbe_hw *hw;
> >  	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
> > -	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> > +	struct rte_eth_dev_data *dev_data = dev->data;
> >
> >  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> >
> >  	if ((mtu < ETHER_MIN_MTU) || (max_frame >
> > ETHER_MAX_JUMBO_FRAME_LEN))
> >  		return -EINVAL;
> >
> > -	/* refuse mtu that requires the support of scattered packets when
> > this
> > -	 * feature has not been enabled before.
> > +	/* If device is started, refuse mtu that requires the support of
> > +	 * scattered packets when this feature has not been enabled before.
> >  	 */
> > -	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
> > +	if (dev_data->dev_started && !dev_data->scattered_rx &&
> >  	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
> > -	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
> > +	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
> > +		PMD_INIT_LOG(ERR, "Stop port first.");
> >  		return -EINVAL;
> > +	}
> >
> >  	/*
> >  	 * When supported by the underlying PF driver, use the
> > IXGBE_VF_SET_MTU
> > --
> > 2.19.1

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[David Harton (dharton)]

Hi,

> -----Original Message-----
> From: Zhao1, Wei <wei.zhao1@intel.com>
> Sent: Tuesday, April 02, 2019 10:26 PM
> To: David Harton (dharton) <dharton@cisco.com>; dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> HI,
> 
> Why not add some more code
> "
> 	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
> 		dev->data->scattered_rx = 1;
> "
> 
> Into ixgbevf_dev_rx_init() to enable scatter mode when start device?

I don't think it's necessary is it?

Doesn't this code in ixgbevf_dev_rx_init() handle it?

        if (rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ||
            /* It adds dual VLAN length for supporting dual VLAN */
            (rxmode->max_rx_pkt_len +
                2 * IXGBE_VLAN_TAG_SIZE) > buf_size) {
            if (!dev->data->scattered_rx)
                PMD_INIT_LOG(DEBUG, "forcing scatter mode");
            dev->data->scattered_rx = 1;
        }

Regards,
Dave

> 
> 
> Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> > Sent: Wednesday, April 3, 2019 9:19 AM
> > To: dev@dpdk.org
> > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> > Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> >
> > Currently, if requested MTU is bigger than mbuf size and scattered
> > receive is not enabled, setting MTU to that value fails.
> >
> > This patch allows setting this special MTU when device is stopped,
> > because scattered_rx will be re-configured during next port start and
> > driver may enable scattered receive according new MTU value.
> >
> > After this patch, driver may select different receive function
> > automatically after MTU set, according MTU values selected.
> >
> > Signed-off-by: David Harton <dharton@cisco.com>
> > ---
> >  drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
> >  1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > index feec85634..0b962c8db 100644
> > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > @@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev,
> > uint16_t mtu)  {
> >  	struct ixgbe_hw *hw;
> >  	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
> > -	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> > +	struct rte_eth_dev_data *dev_data = dev->data;
> >
> >  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> >
> >  	if ((mtu < ETHER_MIN_MTU) || (max_frame >
> > ETHER_MAX_JUMBO_FRAME_LEN))
> >  		return -EINVAL;
> >
> > -	/* refuse mtu that requires the support of scattered packets when
> > this
> > -	 * feature has not been enabled before.
> > +	/* If device is started, refuse mtu that requires the support of
> > +	 * scattered packets when this feature has not been enabled before.
> >  	 */
> > -	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
> > +	if (dev_data->dev_started && !dev_data->scattered_rx &&
> >  	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
> > -	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
> > +	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
> > +		PMD_INIT_LOG(ERR, "Stop port first.");
> >  		return -EINVAL;
> > +	}
> >
> >  	/*
> >  	 * When supported by the underlying PF driver, use the
> > IXGBE_VF_SET_MTU
> > --
> > 2.19.1

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[Zhang, Qi Z]

> -----Original Message-----
> From: Zhao1, Wei
> Sent: Wednesday, April 3, 2019 10:26 AM
> To: David Harton <dharton@cisco.com>; dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> HI,
> 
> Why not add some more code
> "
> 	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
> 		dev->data->scattered_rx = 1;
> "
> 
> Into ixgbevf_dev_rx_init() to enable scatter mode when start device?
> 
> 
> Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> > Sent: Wednesday, April 3, 2019 9:19 AM
> > To: dev@dpdk.org
> > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> > Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> >
> > Currently, if requested MTU is bigger than mbuf size and scattered
> > receive is not enabled, setting MTU to that value fails.
> >
> > This patch allows setting this special MTU when device is stopped,
> > because scattered_rx will be re-configured during next port start and
> > driver may enable scattered receive according new MTU value.
> >
> > After this patch, driver may select different receive function
> > automatically after MTU set, according MTU values selected.
> >
> > Signed-off-by: David Harton <dharton@cisco.com>

Applied to dpdk-next-net-intel.

Thanks
Qi 

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[Zhang, Qi Z]

> -----Original Message-----
> From: Zhao1, Wei
> Sent: Wednesday, April 3, 2019 10:26 AM
> To: David Harton <dharton@cisco.com>; dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> HI,
> 
> Why not add some more code
> "
> 	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
> 		dev->data->scattered_rx = 1;
> "
> 
> Into ixgbevf_dev_rx_init() to enable scatter mode when start device?
> 
> 
> Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> > Sent: Wednesday, April 3, 2019 9:19 AM
> > To: dev@dpdk.org
> > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> > Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> >
> > Currently, if requested MTU is bigger than mbuf size and scattered
> > receive is not enabled, setting MTU to that value fails.
> >
> > This patch allows setting this special MTU when device is stopped,
> > because scattered_rx will be re-configured during next port start and
> > driver may enable scattered receive according new MTU value.
> >
> > After this patch, driver may select different receive function
> > automatically after MTU set, according MTU values selected.
> >
> > Signed-off-by: David Harton <dharton@cisco.com>

Applied to dpdk-next-net-intel.

Thanks
Qi 

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[Zhao1, Wei]

Hi, 

> -----Original Message-----
> From: David Harton (dharton) [mailto:dharton@cisco.com]
> Sent: Wednesday, April 3, 2019 8:36 PM
> To: Zhao1, Wei <wei.zhao1@intel.com>; dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> Hi,
> 
> > -----Original Message-----
> > From: Zhao1, Wei <wei.zhao1@intel.com>
> > Sent: Tuesday, April 02, 2019 10:26 PM
> > To: David Harton (dharton) <dharton@cisco.com>; dev@dpdk.org
> > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> > Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting
> > limitation
> >
> > HI,
> >
> > Why not add some more code
> > "
> > 	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
> > 		dev->data->scattered_rx = 1;
> > "
> >
> > Into ixgbevf_dev_rx_init() to enable scatter mode when start device?
> 
> I don't think it's necessary is it?
> 
> Doesn't this code in ixgbevf_dev_rx_init() handle it?


Sorry, miss that code.

> 
>         if (rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ||
>             /* It adds dual VLAN length for supporting dual VLAN */
>             (rxmode->max_rx_pkt_len +
>                 2 * IXGBE_VLAN_TAG_SIZE) > buf_size) {
>             if (!dev->data->scattered_rx)
>                 PMD_INIT_LOG(DEBUG, "forcing scatter mode");
>             dev->data->scattered_rx = 1;
>         }
> 
> Regards,
> Dave
> 
> >
> >
> > Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
> >
> >
> > > -----Original Message-----
> > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> > > Sent: Wednesday, April 3, 2019 9:19 AM
> > > To: dev@dpdk.org
> > > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > > <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> > > Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting
> > > limitation
> > >
> > > Currently, if requested MTU is bigger than mbuf size and scattered
> > > receive is not enabled, setting MTU to that value fails.
> > >
> > > This patch allows setting this special MTU when device is stopped,
> > > because scattered_rx will be re-configured during next port start
> > > and driver may enable scattered receive according new MTU value.
> > >
> > > After this patch, driver may select different receive function
> > > automatically after MTU set, according MTU values selected.
> > >
> > > Signed-off-by: David Harton <dharton@cisco.com>
> > > ---
> > >  drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
> > >  1 file changed, 7 insertions(+), 5 deletions(-)
> > >
> > > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > > index feec85634..0b962c8db 100644
> > > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > > @@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev
> *dev,
> > > uint16_t mtu)  {
> > >  	struct ixgbe_hw *hw;
> > >  	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
> > > -	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> > > +	struct rte_eth_dev_data *dev_data = dev->data;
> > >
> > >  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> > >
> > >  	if ((mtu < ETHER_MIN_MTU) || (max_frame >
> > > ETHER_MAX_JUMBO_FRAME_LEN))
> > >  		return -EINVAL;
> > >
> > > -	/* refuse mtu that requires the support of scattered packets when
> > > this
> > > -	 * feature has not been enabled before.
> > > +	/* If device is started, refuse mtu that requires the support of
> > > +	 * scattered packets when this feature has not been enabled before.
> > >  	 */
> > > -	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
> > > +	if (dev_data->dev_started && !dev_data->scattered_rx &&
> > >  	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
> > > -	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
> > > +	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
> > > +		PMD_INIT_LOG(ERR, "Stop port first.");
> > >  		return -EINVAL;
> > > +	}
> > >
> > >  	/*
> > >  	 * When supported by the underlying PF driver, use the
> > > IXGBE_VF_SET_MTU
> > > --
> > > 2.19.1

Re: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation

[Zhao1, Wei]

Hi, 

> -----Original Message-----
> From: David Harton (dharton) [mailto:dharton@cisco.com]
> Sent: Wednesday, April 3, 2019 8:36 PM
> To: Zhao1, Wei <wei.zhao1@intel.com>; dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting limitation
> 
> Hi,
> 
> > -----Original Message-----
> > From: Zhao1, Wei <wei.zhao1@intel.com>
> > Sent: Tuesday, April 02, 2019 10:26 PM
> > To: David Harton (dharton) <dharton@cisco.com>; dev@dpdk.org
> > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> > Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting
> > limitation
> >
> > HI,
> >
> > Why not add some more code
> > "
> > 	if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER)
> > 		dev->data->scattered_rx = 1;
> > "
> >
> > Into ixgbevf_dev_rx_init() to enable scatter mode when start device?
> 
> I don't think it's necessary is it?
> 
> Doesn't this code in ixgbevf_dev_rx_init() handle it?


Sorry, miss that code.

> 
>         if (rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ||
>             /* It adds dual VLAN length for supporting dual VLAN */
>             (rxmode->max_rx_pkt_len +
>                 2 * IXGBE_VLAN_TAG_SIZE) > buf_size) {
>             if (!dev->data->scattered_rx)
>                 PMD_INIT_LOG(DEBUG, "forcing scatter mode");
>             dev->data->scattered_rx = 1;
>         }
> 
> Regards,
> Dave
> 
> >
> >
> > Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
> >
> >
> > > -----Original Message-----
> > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Harton
> > > Sent: Wednesday, April 3, 2019 9:19 AM
> > > To: dev@dpdk.org
> > > Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> > > <konstantin.ananyev@intel.com>; David Harton <dharton@cisco.com>
> > > Subject: [dpdk-dev] [PATCH] net/ixgbevf: remove MTU setting
> > > limitation
> > >
> > > Currently, if requested MTU is bigger than mbuf size and scattered
> > > receive is not enabled, setting MTU to that value fails.
> > >
> > > This patch allows setting this special MTU when device is stopped,
> > > because scattered_rx will be re-configured during next port start
> > > and driver may enable scattered receive according new MTU value.
> > >
> > > After this patch, driver may select different receive function
> > > automatically after MTU set, according MTU values selected.
> > >
> > > Signed-off-by: David Harton <dharton@cisco.com>
> > > ---
> > >  drivers/net/ixgbe/ixgbe_ethdev.c | 12 +++++++-----
> > >  1 file changed, 7 insertions(+), 5 deletions(-)
> > >
> > > diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> > > b/drivers/net/ixgbe/ixgbe_ethdev.c
> > > index feec85634..0b962c8db 100644
> > > --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> > > +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> > > @@ -6346,20 +6346,22 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev
> *dev,
> > > uint16_t mtu)  {
> > >  	struct ixgbe_hw *hw;
> > >  	uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
> > > -	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
> > > +	struct rte_eth_dev_data *dev_data = dev->data;
> > >
> > >  	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> > >
> > >  	if ((mtu < ETHER_MIN_MTU) || (max_frame >
> > > ETHER_MAX_JUMBO_FRAME_LEN))
> > >  		return -EINVAL;
> > >
> > > -	/* refuse mtu that requires the support of scattered packets when
> > > this
> > > -	 * feature has not been enabled before.
> > > +	/* If device is started, refuse mtu that requires the support of
> > > +	 * scattered packets when this feature has not been enabled before.
> > >  	 */
> > > -	if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) &&
> > > +	if (dev_data->dev_started && !dev_data->scattered_rx &&
> > >  	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
> > > -	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
> > > +	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) {
> > > +		PMD_INIT_LOG(ERR, "Stop port first.");
> > >  		return -EINVAL;
> > > +	}
> > >
> > >  	/*
> > >  	 * When supported by the underlying PF driver, use the
> > > IXGBE_VF_SET_MTU
> > > --
> > > 2.19.1