[dpdk-dev] [PATCH v2] ixgbe: add check for tx queue number

[Fischetti, Antonio]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Pablo de Lara
> Sent: Wednesday, March 23, 2016 3:29 PM
> To: dev at dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu at intel.com>; De Lara Guarch, Pablo
> <pablo.de.lara.guarch at intel.com>
> Subject: [dpdk-dev] [PATCH v2] ixgbe: add check for tx queue number
> 
> IXGBE supports 128 TX queues. However, the full 128 queues
> are only available in VT and DCB mode.
> In normal default "none" mode (VT/DCB off) the maximum number
> of available queues is only 64.
> IXGBE doesn't check the mode when reporting the available
> number of queues. If a queue larger than 64 is used in default mode,
> the TX packets will be dropped silently.
> 
> This change adds a check to forbid using a queue number larger than 64
> during device configuration (in default mode), so that the problem is
> reported as early as possible.
> It also changes the order of where the dev_conf parameters are copied
> into the dev structure so that the correct maximum number of queues
> is reported for the correct mode.
> 
> Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>

Tested-by: Antonio Fischetti <antonio.fischetti at intel.com>