raw/ioat: fix config script queue size calculation

  The queue size calculation is currently based on "max_tokens" rather than
"max_work_queues_size". This is resulting in the queue size being
incorrectly configured when using the script to configure devices bound to
the IDXD kernel driver.
This patch fixes this miscalculation so devices are configured with
appropriate queue size.

Fixes: 01863b9d2354 ("raw/ioat: include example configuration script")
Cc: stable@dpdk.org

Reported-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
---
 drivers/raw/ioat/dpdk_idxd_cfg.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
  

> The queue size calculation is currently based on "max_tokens" rather than
> "max_work_queues_size". This is resulting in the queue size being
> incorrectly configured when using the script to configure devices bound to
> the IDXD kernel driver.
> This patch fixes this miscalculation so devices are configured with
> appropriate queue size.
> 
> Fixes: 01863b9d2354 ("raw/ioat: include example configuration script")
> Cc: stable@dpdk.org
> 
> Reported-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
> ---
>  drivers/raw/ioat/dpdk_idxd_cfg.py | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/raw/ioat/dpdk_idxd_cfg.py b/drivers/raw/ioat/dpdk_idxd_cfg.py
> index 83ef4817db..fcc27822ef 100755
> --- a/drivers/raw/ioat/dpdk_idxd_cfg.py
> +++ b/drivers/raw/ioat/dpdk_idxd_cfg.py
> @@ -63,7 +63,7 @@ def configure_dsa(dsa_id, queues, prefix):
>      max_groups = dsa_dir.read_int("max_groups")
>      max_engines = dsa_dir.read_int("max_engines")
>      max_queues = dsa_dir.read_int("max_work_queues")
> -    max_tokens = dsa_dir.read_int("max_tokens")
> +    max_work_queues_size = dsa_dir.read_int("max_work_queues_size")
> 
>      nb_queues = min(queues, max_queues)
>      if queues > nb_queues:
> @@ -82,7 +82,7 @@ def configure_dsa(dsa_id, queues, prefix):
>                               "mode": "dedicated",
>                               "name": f"{prefix}_wq{dsa_id}.{q}",
>                               "priority": 1,
> -                             "size": int(max_tokens / nb_queues)})
> +                             "size": int(max_work_queues_size / nb_queues)})
> 
>      # enable device and then queues
>      drv_dir.write_values({"bind": f"dsa{dsa_id}"})
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.25.1
  

On Fri, Jul 16, 2021 at 01:21:55PM +0000, Kevin Laatz wrote:
> The queue size calculation is currently based on "max_tokens" rather than
> "max_work_queues_size". This is resulting in the queue size being
> incorrectly configured when using the script to configure devices bound to
> the IDXD kernel driver.
> This patch fixes this miscalculation so devices are configured with
> appropriate queue size.
> 
> Fixes: 01863b9d2354 ("raw/ioat: include example configuration script")
> Cc: stable@dpdk.org
> 
> Reported-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
  

On Fri, Jul 16, 2021 at 3:22 PM Kevin Laatz <kevin.laatz@intel.com> wrote:
>
> The queue size calculation is currently based on "max_tokens" rather than
> "max_work_queues_size". This is resulting in the queue size being
> incorrectly configured when using the script to configure devices bound to
> the IDXD kernel driver.
> This patch fixes this miscalculation so devices are configured with
> appropriate queue size.
>
> Fixes: 01863b9d2354 ("raw/ioat: include example configuration script")
> Cc: stable@dpdk.org
>
> Reported-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Applied, thanks.