[dpdk-dev] [PATCH] ethdev: fixed device info get issue

[dpdk-dev] [PATCH] ethdev: fixed device info get issue

[Qiming Yang]

This patch fixed error function call order in rte_eth_dev_configure.
This wrong order makes user can't get correct device informations,
and cause DCB configure issue.

Fixes: 3be82f5cc5e3 ("ethdev: support PMD-tuned Tx/Rx parameters")

Signed-off-by: Qiming Yang <qiming.yang@intel.com>
---
 lib/librte_ethdev/rte_ethdev.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index b3ed821..97316f3 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -1053,6 +1053,9 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);
 
+	/* Copy the dev_conf parameter into the dev structure */
+	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
+
 	rte_eth_dev_info_get(port_id, &dev_info);
 
 	/* If number of queues specified by application for both Rx and Tx is
@@ -1098,9 +1101,6 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 		rte_eth_convert_rx_offload_bitfield(
 				&dev_conf->rxmode, &local_conf.rxmode.offloads);
 
-	/* Copy the dev_conf parameter into the dev structure */
-	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
-
 	/*
 	 * Check that the numbers of RX and TX queues are not greater
 	 * than the maximum number of RX and TX queues supported by the
-- 
2.9.5

Re: [dpdk-dev] [PATCH] ethdev: fixed device info get issue

[Andrew Rybchenko]

On 05/15/2018 07:10 PM, Qiming Yang wrote:
> This patch fixed error function call order in rte_eth_dev_configure.
> This wrong order makes user can't get correct device informations,
> and cause DCB configure issue.
>
> Fixes: 3be82f5cc5e3 ("ethdev: support PMD-tuned Tx/Rx parameters")
>
> Signed-off-by: Qiming Yang <qiming.yang@intel.com>
> ---
>   lib/librte_ethdev/rte_ethdev.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index b3ed821..97316f3 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -1053,6 +1053,9 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
>   	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
>   	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);
>   
> +	/* Copy the dev_conf parameter into the dev structure */
> +	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
> +
>   	rte_eth_dev_info_get(port_id, &dev_info);
>   
>   	/* If number of queues specified by application for both Rx and Tx is
> @@ -1098,9 +1101,6 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
>   		rte_eth_convert_rx_offload_bitfield(
>   				&dev_conf->rxmode, &local_conf.rxmode.offloads);
>   
> -	/* Copy the dev_conf parameter into the dev structure */
> -	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
> -

As I understand the goal of this copy is to pickup offloads fill in done 
three lines
above. The patch breaks it.

>   	/*
>   	 * Check that the numbers of RX and TX queues are not greater
>   	 * than the maximum number of RX and TX queues supported by the

Re: [dpdk-dev] [dpdk-stable] [PATCH] ethdev: fixed device info get issue

[Ferruh Yigit]

On 5/15/2018 9:41 AM, Andrew Rybchenko wrote:
> On 05/15/2018 07:10 PM, Qiming Yang wrote:
>> This patch fixed error function call order in rte_eth_dev_configure.
>> This wrong order makes user can't get correct device informations,
>> and cause DCB configure issue.
>>
>> Fixes: 3be82f5cc5e3 ("ethdev: support PMD-tuned Tx/Rx parameters")
>>
>> Signed-off-by: Qiming Yang <qiming.yang@intel.com>
>> ---
>>   lib/librte_ethdev/rte_ethdev.c | 6 +++---
>>   1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
>> index b3ed821..97316f3 100644
>> --- a/lib/librte_ethdev/rte_ethdev.c
>> +++ b/lib/librte_ethdev/rte_ethdev.c
>> @@ -1053,6 +1053,9 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
>>   	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
>>   	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);
>>   
>> +	/* Copy the dev_conf parameter into the dev structure */
>> +	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
>> +
>>   	rte_eth_dev_info_get(port_id, &dev_info);
>>   
>>   	/* If number of queues specified by application for both Rx and Tx is
>> @@ -1098,9 +1101,6 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
>>   		rte_eth_convert_rx_offload_bitfield(
>>   				&dev_conf->rxmode, &local_conf.rxmode.offloads);
>>   
>> -	/* Copy the dev_conf parameter into the dev structure */
>> -	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
>> -
> 
> As I understand the goal of this copy is to pickup offloads fill in done 
> three lines
> above. The patch breaks it.

It can be possible to copy only local_conf.rxmode.offloads here:
dev->data->dev_conf.rxmode.offloads = local_conf.rxmode.offloads;

And this assignment can be done within
"if (dev_conf->rxmode.ignore_offload_bitfield == 0)" block

And can you please add a comment to memcpy that it is required for
dev_infos_get() and needs to be called before it.
Also more details into commit log why this is required for DCB configure.

> 
>>   	/*
>>   	 * Check that the numbers of RX and TX queues are not greater
>>   	 * than the maximum number of RX and TX queues supported by the
> 

Re: [dpdk-dev] [dpdk-stable] [PATCH] ethdev: fixed device info get issue

[Yang, Qiming]

> -----Original Message-----
> From: Yigit, Ferruh
> Sent: Tuesday, May 15, 2018 7:31 PM
> To: Andrew Rybchenko <arybchenko@solarflare.com>; Yang, Qiming
> <qiming.yang@intel.com>; dev@dpdk.org
> Cc: stable@dpdk.org
> Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] ethdev: fixed device info get issue
> 
> On 5/15/2018 9:41 AM, Andrew Rybchenko wrote:
> > On 05/15/2018 07:10 PM, Qiming Yang wrote:
> >> This patch fixed error function call order in rte_eth_dev_configure.
> >> This wrong order makes user can't get correct device informations,
> >> and cause DCB configure issue.
> >>
> >> Fixes: 3be82f5cc5e3 ("ethdev: support PMD-tuned Tx/Rx parameters")
> >>
> >> Signed-off-by: Qiming Yang <qiming.yang@intel.com>
> >> ---
> >>   lib/librte_ethdev/rte_ethdev.c | 6 +++---
> >>   1 file changed, 3 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/lib/librte_ethdev/rte_ethdev.c
> >> b/lib/librte_ethdev/rte_ethdev.c index b3ed821..97316f3 100644
> >> --- a/lib/librte_ethdev/rte_ethdev.c
> >> +++ b/lib/librte_ethdev/rte_ethdev.c
> >> @@ -1053,6 +1053,9 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t
> nb_rx_q, uint16_t nb_tx_q,
> >>   	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -
> ENOTSUP);
> >>   	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -
> ENOTSUP);
> >>
> >> +	/* Copy the dev_conf parameter into the dev structure */
> >> +	memcpy(&dev->data->dev_conf, &local_conf,
> >> +sizeof(dev->data->dev_conf));
> >> +
> >>   	rte_eth_dev_info_get(port_id, &dev_info);
> >>
> >>   	/* If number of queues specified by application for both Rx and Tx
> >> is @@ -1098,9 +1101,6 @@ rte_eth_dev_configure(uint16_t port_id,
> uint16_t nb_rx_q, uint16_t nb_tx_q,
> >>   		rte_eth_convert_rx_offload_bitfield(
> >>   				&dev_conf->rxmode,
> &local_conf.rxmode.offloads);
> >>
> >> -	/* Copy the dev_conf parameter into the dev structure */
> >> -	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data-
> >dev_conf));
> >> -
> >
> > As I understand the goal of this copy is to pickup offloads fill in
> > done three lines above. The patch breaks it.
> 
> It can be possible to copy only local_conf.rxmode.offloads here:
> dev->data->dev_conf.rxmode.offloads = local_conf.rxmode.offloads;
> 
> And this assignment can be done within
> "if (dev_conf->rxmode.ignore_offload_bitfield == 0)" block
> 
Thanks for the solution.

> And can you please add a comment to memcpy that it is required for
> dev_infos_get() and needs to be called before it.
> Also more details into commit log why this is required for DCB configure.
> 
Sure, I'll add detail comment.

> >
> >>   	/*
> >>   	 * Check that the numbers of RX and TX queues are not greater
> >>   	 * than the maximum number of RX and TX queues supported by the
> >

Re: [dpdk-dev] [PATCH] ethdev: fixed device info get issue

[Yang, Qiming]

From: Andrew Rybchenko [mailto:arybchenko@solarflare.com]
Sent: Tuesday, May 15, 2018 4:42 PM
To: Yang, Qiming <qiming.yang@intel.com>; dev@dpdk.org
Cc: stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] ethdev: fixed device info get issue

On 05/15/2018 07:10 PM, Qiming Yang wrote:

This patch fixed error function call order in rte_eth_dev_configure.

This wrong order makes user can't get correct device informations,

and cause DCB configure issue.



Fixes: 3be82f5cc5e3 ("ethdev: support PMD-tuned Tx/Rx parameters")



Signed-off-by: Qiming Yang <qiming.yang@intel.com><mailto:qiming.yang@intel.com>

---

 lib/librte_ethdev/rte_ethdev.c | 6 +++---

 1 file changed, 3 insertions(+), 3 deletions(-)



diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c

index b3ed821..97316f3 100644

--- a/lib/librte_ethdev/rte_ethdev.c

+++ b/lib/librte_ethdev/rte_ethdev.c

@@ -1053,6 +1053,9 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,

  RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);

  RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);



+        /* Copy the dev_conf parameter into the dev structure */

+        memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));

+

         rte_eth_dev_info_get(port_id, &dev_info);



         /* If number of queues specified by application for both Rx and Tx is

@@ -1098,9 +1101,6 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,

                rte_eth_convert_rx_offload_bitfield(

                                &dev_conf->rxmode, &local_conf.rxmode.offloads);



-        /* Copy the dev_conf parameter into the dev structure */

-        memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));

-

As I understand the goal of this copy is to pickup offloads fill in done three lines
above. The patch breaks it.

Thanks for your reminder, I don’t know the background before. But Ferruh give a solution to resolve
The conflict. I’ll send a v2 patch later.



         /*

          * Check that the numbers of RX and TX queues are not greater

          * than the maximum number of RX and TX queues supported by the