diff mbox series

[v3] igb: Allocate MSI-X vector when testing

Message ID 20221123010926.7924-1-akihiko.odaki@daynix.com
State New
Headers
Series [v3] igb: Allocate MSI-X vector when testing |

Commit Message

Akihiko Odaki Nov. 23, 2022, 1:09 a.m. UTC 
  Without this change, the interrupt test fail with MSI-X environment:

$ sudo ethtool -t enp0s2 offline
[   43.921783] igb 0000:00:02.0: offline testing starting
[   44.855824] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Down
[   44.961249] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[   51.272202] igb 0000:00:02.0: testing shared interrupt
[   56.996975] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
The test result is FAIL
The test extra info:
Register test  (offline)	 0
Eeprom test    (offline)	 0
Interrupt test (offline)	 4
Loopback test  (offline)	 0
Link test   (on/offline)	 0

Here, "4" means an expected interrupt was not delivered.

To fix this, route IRQs correctly to the first MSI-X vector by setting
IVAR_MISC. Also, set bit 0 of EIMS so that the vector will not be
masked. The interrupt test now runs properly with this change:

$ sudo ethtool -t enp0s2 offline
[   42.762985] igb 0000:00:02.0: offline testing starting
[   50.141967] igb 0000:00:02.0: testing shared interrupt
[   56.163957] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
The test result is PASS
The test extra info:
Register test  (offline)	 0
Eeprom test    (offline)	 0
Interrupt test (offline)	 0
Loopback test  (offline)	 0
Link test   (on/offline)	 0

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Maciej Fijalkowski Nov. 23, 2022, 3:41 p.m. UTC | #1 
On Wed, Nov 23, 2022 at 10:09:26AM +0900, Akihiko Odaki wrote:
> Without this change, the interrupt test fail with MSI-X environment:
> 
> $ sudo ethtool -t enp0s2 offline
> [   43.921783] igb 0000:00:02.0: offline testing starting
> [   44.855824] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Down
> [   44.961249] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> [   51.272202] igb 0000:00:02.0: testing shared interrupt
> [   56.996975] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> The test result is FAIL
> The test extra info:
> Register test  (offline)	 0
> Eeprom test    (offline)	 0
> Interrupt test (offline)	 4
> Loopback test  (offline)	 0
> Link test   (on/offline)	 0
> 
> Here, "4" means an expected interrupt was not delivered.
> 
> To fix this, route IRQs correctly to the first MSI-X vector by setting
> IVAR_MISC. Also, set bit 0 of EIMS so that the vector will not be
> masked. The interrupt test now runs properly with this change:

Much better!

> 
> $ sudo ethtool -t enp0s2 offline
> [   42.762985] igb 0000:00:02.0: offline testing starting
> [   50.141967] igb 0000:00:02.0: testing shared interrupt
> [   56.163957] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> The test result is PASS
> The test extra info:
> Register test  (offline)	 0
> Eeprom test    (offline)	 0
> Interrupt test (offline)	 0
> Loopback test  (offline)	 0
> Link test   (on/offline)	 0
> 
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>

Same comment as on other patch - justify why there is no fixes tag and
specify the tree in subject.

> ---
>  drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
> index e5f3e7680dc6..ff911af16a4b 100644
> --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
> +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
> @@ -1413,6 +1413,8 @@ static int igb_intr_test(struct igb_adapter *adapter, u64 *data)
>  			*data = 1;
>  			return -1;
>  		}
> +		wr32(E1000_IVAR_MISC, E1000_IVAR_VALID << 8);
> +		wr32(E1000_EIMS, BIT(0));
>  	} else if (adapter->flags & IGB_FLAG_HAS_MSI) {
>  		shared_int = false;
>  		if (request_irq(irq,
> -- 
> 2.38.1
>
Akihiko Odaki Nov. 25, 2022, 9:48 a.m. UTC | #2 
On 2022/11/24 0:41, Maciej Fijalkowski wrote:
> On Wed, Nov 23, 2022 at 10:09:26AM +0900, Akihiko Odaki wrote:
>> Without this change, the interrupt test fail with MSI-X environment:
>>
>> $ sudo ethtool -t enp0s2 offline
>> [   43.921783] igb 0000:00:02.0: offline testing starting
>> [   44.855824] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Down
>> [   44.961249] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
>> [   51.272202] igb 0000:00:02.0: testing shared interrupt
>> [   56.996975] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
>> The test result is FAIL
>> The test extra info:
>> Register test  (offline)	 0
>> Eeprom test    (offline)	 0
>> Interrupt test (offline)	 4
>> Loopback test  (offline)	 0
>> Link test   (on/offline)	 0
>>
>> Here, "4" means an expected interrupt was not delivered.
>>
>> To fix this, route IRQs correctly to the first MSI-X vector by setting
>> IVAR_MISC. Also, set bit 0 of EIMS so that the vector will not be
>> masked. The interrupt test now runs properly with this change:
> 
> Much better!
> 
>>
>> $ sudo ethtool -t enp0s2 offline
>> [   42.762985] igb 0000:00:02.0: offline testing starting
>> [   50.141967] igb 0000:00:02.0: testing shared interrupt
>> [   56.163957] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
>> The test result is PASS
>> The test extra info:
>> Register test  (offline)	 0
>> Eeprom test    (offline)	 0
>> Interrupt test (offline)	 0
>> Loopback test  (offline)	 0
>> Link test   (on/offline)	 0
>>
>> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> 
> Same comment as on other patch - justify why there is no fixes tag and
> specify the tree in subject.

I couldn't identify what commit introduced the problem. Please see:
https://lore.kernel.org/netdev/f2457229-865a-57a0-94a1-c5c63b2f30a5@daynix.com/

Regards,
Akihiko Odaki

> 
>> ---
>>   drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
>> index e5f3e7680dc6..ff911af16a4b 100644
>> --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
>> +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
>> @@ -1413,6 +1413,8 @@ static int igb_intr_test(struct igb_adapter *adapter, u64 *data)
>>   			*data = 1;
>>   			return -1;
>>   		}
>> +		wr32(E1000_IVAR_MISC, E1000_IVAR_VALID << 8);
>> +		wr32(E1000_EIMS, BIT(0));
>>   	} else if (adapter->flags & IGB_FLAG_HAS_MSI) {
>>   		shared_int = false;
>>   		if (request_irq(irq,
>> -- 
>> 2.38.1
>>
Akihiko Odaki Nov. 25, 2022, 9:50 a.m. UTC | #3 
On 2022/11/25 18:48, Akihiko Odaki wrote:
> 
> 
> On 2022/11/24 0:41, Maciej Fijalkowski wrote:
>> On Wed, Nov 23, 2022 at 10:09:26AM +0900, Akihiko Odaki wrote:
>>> Without this change, the interrupt test fail with MSI-X environment:
>>>
>>> $ sudo ethtool -t enp0s2 offline
>>> [   43.921783] igb 0000:00:02.0: offline testing starting
>>> [   44.855824] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Down
>>> [   44.961249] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 
>>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>>> [   51.272202] igb 0000:00:02.0: testing shared interrupt
>>> [   56.996975] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 
>>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>>> The test result is FAIL
>>> The test extra info:
>>> Register test  (offline)     0
>>> Eeprom test    (offline)     0
>>> Interrupt test (offline)     4
>>> Loopback test  (offline)     0
>>> Link test   (on/offline)     0
>>>
>>> Here, "4" means an expected interrupt was not delivered.
>>>
>>> To fix this, route IRQs correctly to the first MSI-X vector by setting
>>> IVAR_MISC. Also, set bit 0 of EIMS so that the vector will not be
>>> masked. The interrupt test now runs properly with this change:
>>
>> Much better!
>>
>>>
>>> $ sudo ethtool -t enp0s2 offline
>>> [   42.762985] igb 0000:00:02.0: offline testing starting
>>> [   50.141967] igb 0000:00:02.0: testing shared interrupt
>>> [   56.163957] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Up 
>>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>>> The test result is PASS
>>> The test extra info:
>>> Register test  (offline)     0
>>> Eeprom test    (offline)     0
>>> Interrupt test (offline)     0
>>> Loopback test  (offline)     0
>>> Link test   (on/offline)     0
>>>
>>> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
>>
>> Same comment as on other patch - justify why there is no fixes tag and
>> specify the tree in subject.
> 
> I couldn't identify what commit introduced the problem. Please see:
> https://lore.kernel.org/netdev/f2457229-865a-57a0-94a1-c5c63b2f30a5@daynix.com/

Sorry, the URL was wrong. The correct URL is:
https://lore.kernel.org/netdev/be5617fe-d332-447a-b836-bec9a6c6d42d@daynix.com/

Regards,
Akihiko Odaki

> 
> Regards,
> Akihiko Odaki
> 
>>
>>> ---
>>>   drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 ++
>>>   1 file changed, 2 insertions(+)
>>>
>>> diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c 
>>> b/drivers/net/ethernet/intel/igb/igb_ethtool.c
>>> index e5f3e7680dc6..ff911af16a4b 100644
>>> --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
>>> +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
>>> @@ -1413,6 +1413,8 @@ static int igb_intr_test(struct igb_adapter 
>>> *adapter, u64 *data)
>>>               *data = 1;
>>>               return -1;
>>>           }
>>> +        wr32(E1000_IVAR_MISC, E1000_IVAR_VALID << 8);
>>> +        wr32(E1000_EIMS, BIT(0));
>>>       } else if (adapter->flags & IGB_FLAG_HAS_MSI) {
>>>           shared_int = false;
>>>           if (request_irq(irq,
>>> -- 
>>> 2.38.1
>>>
Maciej Fijalkowski Nov. 25, 2022, 1:12 p.m. UTC | #4 
On Fri, Nov 25, 2022 at 06:50:45PM +0900, Akihiko Odaki wrote:
> On 2022/11/25 18:48, Akihiko Odaki wrote:
> > 
> > 
> > On 2022/11/24 0:41, Maciej Fijalkowski wrote:
> > > On Wed, Nov 23, 2022 at 10:09:26AM +0900, Akihiko Odaki wrote:
> > > > Without this change, the interrupt test fail with MSI-X environment:
> > > > 
> > > > $ sudo ethtool -t enp0s2 offline
> > > > [   43.921783] igb 0000:00:02.0: offline testing starting
> > > > [   44.855824] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is Down
> > > > [   44.961249] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is
> > > > Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> > > > [   51.272202] igb 0000:00:02.0: testing shared interrupt
> > > > [   56.996975] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is
> > > > Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> > > > The test result is FAIL
> > > > The test extra info:
> > > > Register test  (offline)     0
> > > > Eeprom test    (offline)     0
> > > > Interrupt test (offline)     4
> > > > Loopback test  (offline)     0
> > > > Link test   (on/offline)     0
> > > > 
> > > > Here, "4" means an expected interrupt was not delivered.
> > > > 
> > > > To fix this, route IRQs correctly to the first MSI-X vector by setting
> > > > IVAR_MISC. Also, set bit 0 of EIMS so that the vector will not be
> > > > masked. The interrupt test now runs properly with this change:
> > > 
> > > Much better!
> > > 
> > > > 
> > > > $ sudo ethtool -t enp0s2 offline
> > > > [   42.762985] igb 0000:00:02.0: offline testing starting
> > > > [   50.141967] igb 0000:00:02.0: testing shared interrupt
> > > > [   56.163957] igb 0000:00:02.0 enp0s2: igb: enp0s2 NIC Link is
> > > > Up 1000 Mbps Full Duplex, Flow Control: RX/TX
> > > > The test result is PASS
> > > > The test extra info:
> > > > Register test  (offline)     0
> > > > Eeprom test    (offline)     0
> > > > Interrupt test (offline)     0
> > > > Loopback test  (offline)     0
> > > > Link test   (on/offline)     0
> > > > 
> > > > Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> > > 
> > > Same comment as on other patch - justify why there is no fixes tag and
> > > specify the tree in subject.
> > 
> > I couldn't identify what commit introduced the problem. Please see:
> > https://lore.kernel.org/netdev/f2457229-865a-57a0-94a1-c5c63b2f30a5@daynix.com/
> 
> Sorry, the URL was wrong. The correct URL is:
> https://lore.kernel.org/netdev/be5617fe-d332-447a-b836-bec9a6c6d42d@daynix.com/

Please change the subject to:
[PATCH net v4] igb: Allocate MSI-X vector when testing

and add n the body
Fixes: 4eefa8f01314 ("igb: add single vector msi-x testing to interrupt test")

Also, it is a good practice to include changes between revisions even if
it is only a rewrite of a commit message.

> 
> Regards,
> Akihiko Odaki
> 
> > 
> > Regards,
> > Akihiko Odaki
> > 
> > > 
> > > > ---
> > > >   drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 ++
> > > >   1 file changed, 2 insertions(+)
> > > > 
> > > > diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c
> > > > b/drivers/net/ethernet/intel/igb/igb_ethtool.c
> > > > index e5f3e7680dc6..ff911af16a4b 100644
> > > > --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
> > > > +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
> > > > @@ -1413,6 +1413,8 @@ static int igb_intr_test(struct
> > > > igb_adapter *adapter, u64 *data)
> > > >               *data = 1;
> > > >               return -1;
> > > >           }
> > > > +        wr32(E1000_IVAR_MISC, E1000_IVAR_VALID << 8);
> > > > +        wr32(E1000_EIMS, BIT(0));

Should these registers be cleared at the end of igb_intr_test?

> > > >       } else if (adapter->flags & IGB_FLAG_HAS_MSI) {
> > > >           shared_int = false;
> > > >           if (request_irq(irq,
> > > > -- 
> > > > 2.38.1
> > > >
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index e5f3e7680dc6..ff911af16a4b 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -1413,6 +1413,8 @@  static int igb_intr_test(struct igb_adapter *adapter, u64 *data)
 			*data = 1;
 			return -1;
 		}
+		wr32(E1000_IVAR_MISC, E1000_IVAR_VALID << 8);
+		wr32(E1000_EIMS, BIT(0));
 	} else if (adapter->flags & IGB_FLAG_HAS_MSI) {
 		shared_int = false;
 		if (request_irq(irq,