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* [dpdk-dev] [PATCH] net/vmxnet3: Added mtu_set() function to allow setting MTU.
@ 2019-08-17  4:53 Myers, Charles
  2019-08-20  4:06 ` [dpdk-dev] [PATCH v2] " Myers, Charles
  2019-08-21  2:16 ` [dpdk-dev] [PATCH v3] " Myers, Charles
  0 siblings, 2 replies; 9+ messages in thread
From: Myers, Charles @ 2019-08-17  4:53 UTC (permalink / raw)
  To: dev; +Cc: Myers, Charles

When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
fails with -ENOTSUP and mtu is not stored in the mtu field in the
rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
shared with hypervisor to always be set to 1500.

This may cause issues receiving jumbo frames on Enhanced Data Path
N-VDS.

Signed-off-by: Charles Myers <Charles.Myers@spirent.com>
---
 drivers/net/vmxnet3/vmxnet3_ethdev.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 57feb37..c32c92d 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -88,6 +88,7 @@ static void vmxnet3_dev_info_get(struct rte_eth_dev *dev,
 				 struct rte_eth_dev_info *dev_info);
 static const uint32_t *
 vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev);
+static int vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
 				       uint16_t vid, int on);
 static int vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
@@ -125,6 +126,7 @@ static const struct eth_dev_ops vmxnet3_eth_dev_ops = {
 	.mac_addr_set         = vmxnet3_mac_addr_set,
 	.dev_infos_get        = vmxnet3_dev_info_get,
 	.dev_supported_ptypes_get = vmxnet3_dev_supported_ptypes_get,
+	.mtu_set              = vmxnet3_dev_mtu_set,
 	.vlan_filter_set      = vmxnet3_dev_vlan_filter_set,
 	.vlan_offload_set     = vmxnet3_dev_vlan_offload_set,
 	.rx_queue_setup       = vmxnet3_dev_rx_queue_setup,
@@ -1161,6 +1163,8 @@ vmxnet3_dev_info_get(struct rte_eth_dev *dev __rte_unused,
 	dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
 	dev_info->min_rx_bufsize = 1518 + RTE_PKTMBUF_HEADROOM;
 	dev_info->max_rx_pktlen = 16384; /* includes CRC, cf MAXFRS register */
+	dev_info->min_mtu = VMXNET3_MIN_MTU;
+	dev_info->max_mtu = VMXNET3_MAX_MTU;
 	dev_info->speed_capa = ETH_LINK_SPEED_10G;
 	dev_info->max_mac_addrs = VMXNET3_MAX_MAC_ADDRS;
 
@@ -1205,6 +1209,24 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 }
 
 static int
+vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	if (mtu < VMXNET3_MIN_MTU || mtu > VMXNET3_MAX_MTU) {
+		PMD_DRV_LOG(ERR, "MTU should be between %d and %d",
+			     VMXNET3_MIN_MTU, VMXNET3_MAX_MTU);
+		return -EINVAL;
+	}
+
+	if (dev->data->dev_started) {
+		PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
+			    dev->data->port_id);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int
 vmxnet3_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
 {
 	struct vmxnet3_hw *hw = dev->data->dev_private;
-- 
2.7.4


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [dpdk-dev] [PATCH v2] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-17  4:53 [dpdk-dev] [PATCH] net/vmxnet3: Added mtu_set() function to allow setting MTU Myers, Charles
@ 2019-08-20  4:06 ` " Myers, Charles
  2019-08-20 15:12   ` Stephen Hemminger
  2019-09-03 20:10   ` Yong Wang
  2019-08-21  2:16 ` [dpdk-dev] [PATCH v3] " Myers, Charles
  1 sibling, 2 replies; 9+ messages in thread
From: Myers, Charles @ 2019-08-20  4:06 UTC (permalink / raw)
  To: Yong Wang; +Cc: dev, Myers, Charles

From: Charles Myers <charles.myers@spirent.com>

When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
fails with -ENOTSUP and mtu is not stored in the mtu field in the
rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
shared with hypervisor to always be set to 1500.

This may cause issues receiving jumbo frames on Enhanced Data Path
N-VDS.

Signed-off-by: Charles Myers <charles.myers@spirent.com>
---
SMTP server overwrote the From address display name in previous e-mail.
Hopefully this resubmission fixes it.

 drivers/net/vmxnet3/vmxnet3_ethdev.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 57feb37..c32c92d 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -88,6 +88,7 @@ static void vmxnet3_dev_info_get(struct rte_eth_dev *dev,
 				 struct rte_eth_dev_info *dev_info);
 static const uint32_t *
 vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev);
+static int vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
 				       uint16_t vid, int on);
 static int vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
@@ -125,6 +126,7 @@ static const struct eth_dev_ops vmxnet3_eth_dev_ops = {
 	.mac_addr_set         = vmxnet3_mac_addr_set,
 	.dev_infos_get        = vmxnet3_dev_info_get,
 	.dev_supported_ptypes_get = vmxnet3_dev_supported_ptypes_get,
+	.mtu_set              = vmxnet3_dev_mtu_set,
 	.vlan_filter_set      = vmxnet3_dev_vlan_filter_set,
 	.vlan_offload_set     = vmxnet3_dev_vlan_offload_set,
 	.rx_queue_setup       = vmxnet3_dev_rx_queue_setup,
@@ -1161,6 +1163,8 @@ vmxnet3_dev_info_get(struct rte_eth_dev *dev __rte_unused,
 	dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
 	dev_info->min_rx_bufsize = 1518 + RTE_PKTMBUF_HEADROOM;
 	dev_info->max_rx_pktlen = 16384; /* includes CRC, cf MAXFRS register */
+	dev_info->min_mtu = VMXNET3_MIN_MTU;
+	dev_info->max_mtu = VMXNET3_MAX_MTU;
 	dev_info->speed_capa = ETH_LINK_SPEED_10G;
 	dev_info->max_mac_addrs = VMXNET3_MAX_MAC_ADDRS;
 
@@ -1205,6 +1209,24 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 }
 
 static int
+vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	if (mtu < VMXNET3_MIN_MTU || mtu > VMXNET3_MAX_MTU) {
+		PMD_DRV_LOG(ERR, "MTU should be between %d and %d",
+			     VMXNET3_MIN_MTU, VMXNET3_MAX_MTU);
+		return -EINVAL;
+	}
+
+	if (dev->data->dev_started) {
+		PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
+			    dev->data->port_id);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int
 vmxnet3_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
 {
 	struct vmxnet3_hw *hw = dev->data->dev_private;
-- 
2.7.4


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [dpdk-dev] [PATCH v2] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-20  4:06 ` [dpdk-dev] [PATCH v2] " Myers, Charles
@ 2019-08-20 15:12   ` Stephen Hemminger
  2019-09-03 20:10   ` Yong Wang
  1 sibling, 0 replies; 9+ messages in thread
From: Stephen Hemminger @ 2019-08-20 15:12 UTC (permalink / raw)
  To: Myers, Charles; +Cc: Yong Wang, dev

On Tue, 20 Aug 2019 04:06:53 +0000
"Myers, Charles" <Charles.Myers@spirent.com> wrote:

>  static int
> +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
> +{
> +	if (mtu < VMXNET3_MIN_MTU || mtu > VMXNET3_MAX_MTU) {
> +		PMD_DRV_LOG(ERR, "MTU should be between %d and %d",
> +			     VMXNET3_MIN_MTU, VMXNET3_MAX_MTU);
> +		return -EINVAL;
> +	}
> +

This is not the best way to handle checking validity of MTU value.

The device should report min/max MTU and then rte_eth_dev_set_mtu
will do enforcement there.

This allows application to know what MTU to use, and eliminates
guess/check behavior.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [dpdk-dev] [PATCH v3] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-17  4:53 [dpdk-dev] [PATCH] net/vmxnet3: Added mtu_set() function to allow setting MTU Myers, Charles
  2019-08-20  4:06 ` [dpdk-dev] [PATCH v2] " Myers, Charles
@ 2019-08-21  2:16 ` " Myers, Charles
  2019-08-21  4:43   ` Stephen Hemminger
  2019-09-13 18:47   ` Ferruh Yigit
  1 sibling, 2 replies; 9+ messages in thread
From: Myers, Charles @ 2019-08-21  2:16 UTC (permalink / raw)
  To: Yong Wang; +Cc: dev, Stephen Hemminger, Myers, Charles

From: Charles Myers <charles.myers@spirent.com>

When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
fails with -ENOTSUP and mtu is not stored in the mtu field in the
rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
shared with hypervisor to always be set to 1500.

This may cause issues receiving jumbo frames on Enhanced Data Path
N-VDS.

Signed-off-by: Charles Myers <charles.myers@spirent.com>
---
Removed redundant MTU check in vmxnet3_dev_mtu_set() which should already be done
in rte_eth_dev_set_mtu().

 drivers/net/vmxnet3/vmxnet3_ethdev.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 57feb37..c12d70b 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -88,6 +88,7 @@ static void vmxnet3_dev_info_get(struct rte_eth_dev *dev,
 				 struct rte_eth_dev_info *dev_info);
 static const uint32_t *
 vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev);
+static int vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
 				       uint16_t vid, int on);
 static int vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
@@ -125,6 +126,7 @@ static const struct eth_dev_ops vmxnet3_eth_dev_ops = {
 	.mac_addr_set         = vmxnet3_mac_addr_set,
 	.dev_infos_get        = vmxnet3_dev_info_get,
 	.dev_supported_ptypes_get = vmxnet3_dev_supported_ptypes_get,
+	.mtu_set              = vmxnet3_dev_mtu_set,
 	.vlan_filter_set      = vmxnet3_dev_vlan_filter_set,
 	.vlan_offload_set     = vmxnet3_dev_vlan_offload_set,
 	.rx_queue_setup       = vmxnet3_dev_rx_queue_setup,
@@ -1161,6 +1163,8 @@ vmxnet3_dev_info_get(struct rte_eth_dev *dev __rte_unused,
 	dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
 	dev_info->min_rx_bufsize = 1518 + RTE_PKTMBUF_HEADROOM;
 	dev_info->max_rx_pktlen = 16384; /* includes CRC, cf MAXFRS register */
+	dev_info->min_mtu = VMXNET3_MIN_MTU;
+	dev_info->max_mtu = VMXNET3_MAX_MTU;
 	dev_info->speed_capa = ETH_LINK_SPEED_10G;
 	dev_info->max_mac_addrs = VMXNET3_MAX_MAC_ADDRS;
 
@@ -1205,6 +1209,18 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 }
 
 static int
+vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	if (dev->data->dev_started) {
+		PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
+			    dev->data->port_id);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int
 vmxnet3_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
 {
 	struct vmxnet3_hw *hw = dev->data->dev_private;
-- 
2.7.4


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [dpdk-dev] [PATCH v3] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-21  2:16 ` [dpdk-dev] [PATCH v3] " Myers, Charles
@ 2019-08-21  4:43   ` Stephen Hemminger
  2019-08-21  5:19     ` Myers, Charles
  2019-09-13 18:47   ` Ferruh Yigit
  1 sibling, 1 reply; 9+ messages in thread
From: Stephen Hemminger @ 2019-08-21  4:43 UTC (permalink / raw)
  To: Myers, Charles; +Cc: Yong Wang, dev

On Wed, 21 Aug 2019 02:16:58 +0000
"Myers, Charles" <Charles.Myers@spirent.com> wrote:

>  
>  static int
> +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
> +{
> +	if (dev->data->dev_started) {
> +		PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
> +			    dev->data->port_id);
> +		return -EBUSY;
> +	}
> +
> +	return 0;
> +}
> +

Don't you need to reset the rx ring to change mtu on the fly?
At a minimum you need to communicate this value to host through the
shared driver page.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [dpdk-dev] [PATCH v3] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-21  4:43   ` Stephen Hemminger
@ 2019-08-21  5:19     ` Myers, Charles
  0 siblings, 0 replies; 9+ messages in thread
From: Myers, Charles @ 2019-08-21  5:19 UTC (permalink / raw)
  To: Stephen Hemminger; +Cc: Yong Wang, dev

MTU change is currently only allowed when device is stopped.

Current code in master branch already sets MTU in shared data correctly when starting the device:

static int
vmxnet3_setup_driver_shared(struct rte_eth_dev *dev)
{
        struct rte_eth_conf port_conf = dev->data->dev_conf;
        struct vmxnet3_hw *hw = dev->data->dev_private;
        uint32_t mtu = dev->data->mtu;
...
        devRead->misc.mtu = rte_le_to_cpu_32(mtu);
...
}

However current code in master branch does not implement a mtu_set() function so MTU in the dev->data is never changed from default of 1500:

int
rte_eth_dev_set_mtu(uint16_t port_id, uint16_t mtu)
{
        int ret;
        struct rte_eth_dev_info dev_info;
        struct rte_eth_dev *dev;

        RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
        dev = &rte_eth_devices[port_id];
        RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->mtu_set, -ENOTSUP);

        /*
         * Check if the device supports dev_infos_get, if it does not
         * skip min_mtu/max_mtu validation here as this requires values
         * that are populated within the call to rte_eth_dev_info_get()
         * which relies on dev->dev_ops->dev_infos_get.
         */
        if (*dev->dev_ops->dev_infos_get != NULL) {
                rte_eth_dev_info_get(port_id, &dev_info);
                if (mtu < dev_info.min_mtu || mtu > dev_info.max_mtu)
                        return -EINVAL;
        }

        ret = (*dev->dev_ops->mtu_set)(dev, mtu);
        if (!ret)
                dev->data->mtu = mtu;

        return eth_err(port_id, ret);
}

The vmxnet3 driver just needs to implement mtu_set() so that rte_eth_dev_set_mtu() allows changing the MTU and puts the value in dev->data->mtu .


-----Original Message-----
From: Stephen Hemminger <stephen@networkplumber.org> 
Sent: Tuesday, August 20, 2019 6:43 PM
To: Myers, Charles <Charles.Myers@spirent.com>
Cc: Yong Wang <yongwang@vmware.com>; dev@dpdk.org
Subject: Re: [PATCH v3] net/vmxnet3: Added mtu_set() function to allow setting MTU.

On Wed, 21 Aug 2019 02:16:58 +0000
"Myers, Charles" <Charles.Myers@spirent.com> wrote:

>  
>  static int
> +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) {
> +	if (dev->data->dev_started) {
> +		PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
> +			    dev->data->port_id);
> +		return -EBUSY;
> +	}
> +
> +	return 0;
> +}
> +

Don't you need to reset the rx ring to change mtu on the fly?
At a minimum you need to communicate this value to host through the shared driver page.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [dpdk-dev] [PATCH v2] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-20  4:06 ` [dpdk-dev] [PATCH v2] " Myers, Charles
  2019-08-20 15:12   ` Stephen Hemminger
@ 2019-09-03 20:10   ` Yong Wang
  1 sibling, 0 replies; 9+ messages in thread
From: Yong Wang @ 2019-09-03 20:10 UTC (permalink / raw)
  To: Myers, Charles; +Cc: dev

-----Original Message-----
From: "Myers, Charles" <Charles.Myers@spirent.com>
Date: Monday, August 19, 2019 at 9:07 PM
To: Yong Wang <yongwang@vmware.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>, "Myers, Charles" <Charles.Myers@spirent.com>
Subject: [PATCH v2] net/vmxnet3: Added mtu_set() function to allow setting MTU.

    From: Charles Myers <charles.myers@spirent.com>
    
    When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
    fails with -ENOTSUP and mtu is not stored in the mtu field in the
    rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
    shared with hypervisor to always be set to 1500.
    
    This may cause issues receiving jumbo frames on Enhanced Data Path
    N-VDS.
    
    Signed-off-by: Charles Myers <charles.myers@spirent.com>
    ---
    SMTP server overwrote the From address display name in previous e-mail.
    Hopefully this resubmission fixes it.
    
     drivers/net/vmxnet3/vmxnet3_ethdev.c | 22 ++++++++++++++++++++++
     1 file changed, 22 insertions(+)
    
    diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
    index 57feb37..c32c92d 100644
    --- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
    +++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
    @@ -88,6 +88,7 @@ static void vmxnet3_dev_info_get(struct rte_eth_dev *dev,
     				 struct rte_eth_dev_info *dev_info);
     static const uint32_t *
     vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev);
    +static int vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
     static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
     				       uint16_t vid, int on);
     static int vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
    @@ -125,6 +126,7 @@ static const struct eth_dev_ops vmxnet3_eth_dev_ops = {
     	.mac_addr_set         = vmxnet3_mac_addr_set,
     	.dev_infos_get        = vmxnet3_dev_info_get,
     	.dev_supported_ptypes_get = vmxnet3_dev_supported_ptypes_get,
    +	.mtu_set              = vmxnet3_dev_mtu_set,
     	.vlan_filter_set      = vmxnet3_dev_vlan_filter_set,
     	.vlan_offload_set     = vmxnet3_dev_vlan_offload_set,
     	.rx_queue_setup       = vmxnet3_dev_rx_queue_setup,
    @@ -1161,6 +1163,8 @@ vmxnet3_dev_info_get(struct rte_eth_dev *dev __rte_unused,
     	dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
     	dev_info->min_rx_bufsize = 1518 + RTE_PKTMBUF_HEADROOM;
     	dev_info->max_rx_pktlen = 16384; /* includes CRC, cf MAXFRS register */
    +	dev_info->min_mtu = VMXNET3_MIN_MTU;
    +	dev_info->max_mtu = VMXNET3_MAX_MTU;
     	dev_info->speed_capa = ETH_LINK_SPEED_10G;
     	dev_info->max_mac_addrs = VMXNET3_MAX_MAC_ADDRS;
     
    @@ -1205,6 +1209,24 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
     }
     
     static int
    +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
    +{
    +	if (mtu < VMXNET3_MIN_MTU || mtu > VMXNET3_MAX_MTU) {
    +		PMD_DRV_LOG(ERR, "MTU should be between %d and %d",
    +			     VMXNET3_MIN_MTU, VMXNET3_MAX_MTU);
    +		return -EINVAL;
    +	}
    +

It looks like the above check is redundant as rte_eth_dev_set_mtu() already checks the same based on dev_info->min_mtu and max_mtu.  But seems many other drivers are doing the same check so probably a separate patch to clean this up.

    +	if (dev->data->dev_started) {
    +		PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
    +			    dev->data->port_id);
    +		return -EBUSY;
    +	}
    +

Can you add the following for the vmxnet3 backend to see the change:

	dev->data->mtu = mtu;  /* this is needed because vmxnet3_dev_start use this to update the backend but  rte_eth_dev_set_mtu() set it after the driver callback */

	/* changing mtu for vmxnet3 pmd does not require a restart                                                                                                                                               
	 * We stop and restart the device here                                                                                                                                              
	 * just to pass the mtu info to the backend. */                                                                                                                                                          
	vmxnet3_dev_stop(dev);                                                                                                                                                                                   
	vmxnet3_dev_start(dev);      

    +	return 0;
    +}
    +
    +static int
     vmxnet3_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
     {
     	struct vmxnet3_hw *hw = dev->data->dev_private;
    -- 
    2.7.4
    
    


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [dpdk-dev] [PATCH v3] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-08-21  2:16 ` [dpdk-dev] [PATCH v3] " Myers, Charles
  2019-08-21  4:43   ` Stephen Hemminger
@ 2019-09-13 18:47   ` Ferruh Yigit
  2019-09-13 18:59     ` Ferruh Yigit
  1 sibling, 1 reply; 9+ messages in thread
From: Ferruh Yigit @ 2019-09-13 18:47 UTC (permalink / raw)
  To: Myers, Charles, Yong Wang; +Cc: dev, Stephen Hemminger

On 8/21/2019 3:16 AM, Myers, Charles wrote:
> From: Charles Myers <charles.myers@spirent.com>
> 
> When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
> fails with -ENOTSUP and mtu is not stored in the mtu field in the
> rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
> shared with hypervisor to always be set to 1500.
> 
> This may cause issues receiving jumbo frames on Enhanced Data Path
> N-VDS.
> 
> Signed-off-by: Charles Myers <charles.myers@spirent.com>

Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

Applied to dpdk-next-net/master, thanks.


> @@ -1205,6 +1209,18 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
>  }
>  
>  static int
> +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
> +{

'mtu' is unused and giving build error:
error: unused parameter ‘mtu’ [-Werror=unused-parameter]

Fixed while merging:
 +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu __rte_unused)



^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [dpdk-dev] [PATCH v3] net/vmxnet3: Added mtu_set() function to allow setting MTU.
  2019-09-13 18:47   ` Ferruh Yigit
@ 2019-09-13 18:59     ` Ferruh Yigit
  0 siblings, 0 replies; 9+ messages in thread
From: Ferruh Yigit @ 2019-09-13 18:59 UTC (permalink / raw)
  To: Myers, Charles, Yong Wang; +Cc: dev, Stephen Hemminger

On 9/13/2019 7:47 PM, Ferruh Yigit wrote:
> On 8/21/2019 3:16 AM, Myers, Charles wrote:
>> From: Charles Myers <charles.myers@spirent.com>
>>
>> When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
>> fails with -ENOTSUP and mtu is not stored in the mtu field in the
>> rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
>> shared with hypervisor to always be set to 1500.
>>
>> This may cause issues receiving jumbo frames on Enhanced Data Path
>> N-VDS.
>>
>> Signed-off-by: Charles Myers <charles.myers@spirent.com>
> 
> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
> 
> Applied to dpdk-next-net/master, thanks.

It seems there is waiting change request from the maintainer that I missed,
dropping the patch from the tree and updating the patchwork state.

Charles, can you please sync with Yong if the change request is not clear?

> 
> 
>> @@ -1205,6 +1209,18 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
>>  }
>>  
>>  static int
>> +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
>> +{
> 
> 'mtu' is unused and giving build error:
> error: unused parameter ‘mtu’ [-Werror=unused-parameter]
> 
> Fixed while merging:
>  +vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu __rte_unused)
> 
> 


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, back to index

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-17  4:53 [dpdk-dev] [PATCH] net/vmxnet3: Added mtu_set() function to allow setting MTU Myers, Charles
2019-08-20  4:06 ` [dpdk-dev] [PATCH v2] " Myers, Charles
2019-08-20 15:12   ` Stephen Hemminger
2019-09-03 20:10   ` Yong Wang
2019-08-21  2:16 ` [dpdk-dev] [PATCH v3] " Myers, Charles
2019-08-21  4:43   ` Stephen Hemminger
2019-08-21  5:19     ` Myers, Charles
2019-09-13 18:47   ` Ferruh Yigit
2019-09-13 18:59     ` Ferruh Yigit

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