[PATCH] ixgbe 82599: Query assignment of queues to Virtual Function

[PATCH] ixgbe 82599: Query assignment of queues to Virtual Function

[Qinglai Xiao]

Physical Function assignes Tx/Rx queues to each VF according to
different schemes[1]. By querying through mailbox, VF is able to
get number of Tx/Rx queues assigned to it.

Note that current Intel ixgbe driver ixgbe-3.18.7 does not fully
support mailbox message IXGBE_VF_GET_QUEUES. The service routine
for IXGBE_VF_GET_QUEUES must be fixed, otherwise PF always return
1 as Tx/Rx queue number.

[1] See section 7.2.1.2.1, 7.1.2.2 and 7.10.2.7.2 of Intel 82599 10
    Gbe Controller Datasheet.

Signed-off-by: Qinglai Xiao <jigsaw-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 lib/librte_pmd_ixgbe/ixgbe_ethdev.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
index f217564..e269ad7 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
+++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
@@ -750,6 +750,22 @@ eth_ixgbe_dev_init(__attribute__((unused)) struct eth_driver *eth_drv,
 	return 0;
 }
 
+static void ixgbevf_get_queue_num(struct ixgbe_hw *hw)
+{
+	/* Traffic classes are not supported by now */
+	unsigned int tcs, tc;
+
+	/*
+	 * Must let PF know we are at mailbox API 11 level.
+	 * Otherwise PF won't answer properly.
+	 * In case that PF fails to provide Rx/Tx queue number,
+	 * max_tx_queues and max_rx_queues remain to be 1.
+	 */
+	if (!ixgbevf_negotiate_api_version(hw, ixgbe_mbox_api_11))
+		ixgbevf_get_queues(hw, &tcs, &tc);
+}
+
+
 /*
  * Virtual Function device init
  */
@@ -818,6 +834,9 @@ eth_ixgbevf_dev_init(__attribute__((unused)) struct eth_driver *eth_drv,
 		return (diag);
 	}
 
+	/* Get Rx/Tx queue count via mailbox, which is ready after reset_hw */
+	ixgbevf_get_queue_num(hw);
+
 	/* Allocate memory for storing MAC addresses */
 	eth_dev->data->mac_addrs = rte_zmalloc("ixgbevf", ETHER_ADDR_LEN *
 			hw->mac.num_rar_entries, 0);
-- 
1.7.1

Re: [PATCH] ixgbe: query assignment of queues to VF

[Thomas Monjalon]

21/10/2013 16:11, Qinglai Xiao :
> Physical Function assignes Tx/Rx queues to each VF according to
> different schemes[1]. By querying through mailbox, VF is able to
> get number of Tx/Rx queues assigned to it.
> 
> Note that current Intel ixgbe driver ixgbe-3.18.7 does not fully
> support mailbox message IXGBE_VF_GET_QUEUES. The service routine
> for IXGBE_VF_GET_QUEUES must be fixed, otherwise PF always return
> 1 as Tx/Rx queue number.
> 
> [1] See section 7.2.1.2.1, 7.1.2.2 and 7.10.2.7.2 of Intel 82599 10
>     Gbe Controller Datasheet.
> 
> Signed-off-by: Qinglai Xiao <jigsaw-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Acked and applied with light modifications:

-	 * Must let PF know we are at mailbox API 11 level.
+	 * Must let PF know we are at mailbox API version 1.1.

> +}
> +
> +
>  /*
>   * Virtual Function device init

Only 1 empty line is sufficient here.

Thanks for your patch.
Please, keep us informed about the needed PF patch.
-- 
Thomas

Re: [PATCH] ixgbe: query assignment of queues to VF

[jigsaw]

Hi Thomas,

>>Please, keep us informed about the needed PF patch.

First of all, where and how should I post the patch to PF driver?
And secondly I have only 82599, so I cannot run test for 82598 and
X540. Is it possible that you could test on different NIC?

thx &
rgds,
-ql

On Wed, Oct 23, 2013 at 12:19 PM, Thomas Monjalon
<thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org> wrote:
> 21/10/2013 16:11, Qinglai Xiao :
>> Physical Function assignes Tx/Rx queues to each VF according to
>> different schemes[1]. By querying through mailbox, VF is able to
>> get number of Tx/Rx queues assigned to it.
>>
>> Note that current Intel ixgbe driver ixgbe-3.18.7 does not fully
>> support mailbox message IXGBE_VF_GET_QUEUES. The service routine
>> for IXGBE_VF_GET_QUEUES must be fixed, otherwise PF always return
>> 1 as Tx/Rx queue number.
>>
>> [1] See section 7.2.1.2.1, 7.1.2.2 and 7.10.2.7.2 of Intel 82599 10
>>     Gbe Controller Datasheet.
>>
>> Signed-off-by: Qinglai Xiao <jigsaw-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>
> Acked and applied with light modifications:
>
> -        * Must let PF know we are at mailbox API 11 level.
> +        * Must let PF know we are at mailbox API version 1.1.
>
>> +}
>> +
>> +
>>  /*
>>   * Virtual Function device init
>
> Only 1 empty line is sufficient here.
>
> Thanks for your patch.
> Please, keep us informed about the needed PF patch.
> --
> Thomas

Re: [PATCH] ixgbe: query assignment of queues to VF

[Thomas Monjalon]

23/10/2013 14:26, jigsaw :
> First of all, where and how should I post the patch to PF driver?

You should send your patch to kernel.org via the netdev mailing list:
	http://vger.kernel.org/vger-lists.html#netdev

> And secondly I have only 82599, so I cannot run test for 82598 and
> X540. Is it possible that you could test on different NIC?

I don't know if I'll have access to 82598 and X540 in the next weeks.
Is there anybody else who would like to help with tests ?

-- 
Thomas

Re: [PATCH] ixgbe: query assignment of queues to VF

[jigsaw]

Hi Thomas,

Thanks for your answer. I'll try to send the patch to netdev list and
let you know the result.
BTW, I double checked 82598 and find that it doesn't have mailbox at
all, meaning this patch is for 82599 and X540 only.
So the test is only needed for X540.

thx &
rgds,
-ql

On Thu, Oct 24, 2013 at 11:48 AM, Thomas Monjalon
<thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org> wrote:
> 23/10/2013 14:26, jigsaw :
>> First of all, where and how should I post the patch to PF driver?
>
> You should send your patch to kernel.org via the netdev mailing list:
>         http://vger.kernel.org/vger-lists.html#netdev
>
>> And secondly I have only 82599, so I cannot run test for 82598 and
>> X540. Is it possible that you could test on different NIC?
>
> I don't know if I'll have access to 82598 and X540 in the next weeks.
> Is there anybody else who would like to help with tests ?
>
> --
> Thomas