[v2] event/dlb2: fix port COS range allocation

  This commit fixes allocation of port COS
when application requested port COS exceeds
(e.g. beyond 0-15) the number of LDB ports for
the domain.

We limit application specified ports from a
COS to the max ports allocated for the COS
so that the rest of the of the ports can be
allocated from default(best) COS.

Fixes: bec8901bfe9f ("event/dlb2: support ldb port specific COS")
Cc: stable@dpdk.org

Signed-off-by: Abdullah Sevincer <abdullah.sevincer@intel.com>
---
 drivers/event/dlb2/dlb2.c      | 14 +++++++++-----
 drivers/event/dlb2/dlb2_priv.h |  2 ++
 2 files changed, 11 insertions(+), 5 deletions(-)
  

On Thu, Oct 20, 2022 at 5:38 AM Abdullah Sevincer
<abdullah.sevincer@intel.com> wrote:
>
> This commit fixes allocation of port COS
> when application requested port COS exceeds
> (e.g. beyond 0-15) the number of LDB ports for
> the domain.
>
> We limit application specified ports from a
> COS to the max ports allocated for the COS
> so that the rest of the of the ports can be
> allocated from default(best) COS.
>
> Fixes: bec8901bfe9f ("event/dlb2: support ldb port specific COS")
> Cc: stable@dpdk.org
>
> Signed-off-by: Abdullah Sevincer <abdullah.sevincer@intel.com>


Please rebase to dpdk-next-eventdev

[for-main]dell[dpdk-next-eventdev] $ git pw series apply 25323
Failed to apply patch:
Applying: event/dlb2: fix port COS range allocation
Using index info to reconstruct a base tree...
M       drivers/event/dlb2/dlb2.c
M       drivers/event/dlb2/dlb2_priv.h
Falling back to patching base and 3-way merge...
Auto-merging drivers/event/dlb2/dlb2_priv.h
Auto-merging drivers/event/dlb2/dlb2.c
CONFLICT (content): Merge conflict in drivers/event/dlb2/dlb2.c
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 event/dlb2: fix port COS range allocation
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

[for-main]dell[dpdk-next-eventdev] $ git diff
diff --cc drivers/event/dlb2/dlb2.c
index 02f0e57208,62e2bbeb3d..0000000000
--- a/drivers/event/dlb2/dlb2.c
+++ b/drivers/event/dlb2/dlb2.c
@@@ -182,8 -182,10 +182,14 @@@ dlb2_init_port_cos(struct dlb2_eventde

        for (q = 0; q < DLB2_MAX_NUM_PORTS_ALL; q++) {
                dlb2->ev_ports[q].cos_id = port_cos[q];
++<<<<<<< HEAD
 +              if (port_cos[q] != DLB2_COS_DEFAULT) {
++=======
+               if (port_cos[q] != DLB2_COS_DEFAULT &&
+                   dlb2->cos_ports[port_cos[q]] <
DLB2_MAX_NUM_LDB_PORTS_PER_COS) {
++>>>>>>> event/dlb2: fix port COS range allocation
                        dlb2->cos_ports[port_cos[q]]++;
+                       dlb2->max_cos_port = q;
                }
        }
  }
> ---
>  drivers/event/dlb2/dlb2.c      | 14 +++++++++-----
>  drivers/event/dlb2/dlb2_priv.h |  2 ++
>  2 files changed, 11 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/event/dlb2/dlb2.c b/drivers/event/dlb2/dlb2.c
> index 7fd89e940b..62e2bbeb3d 100644
> --- a/drivers/event/dlb2/dlb2.c
> +++ b/drivers/event/dlb2/dlb2.c
> @@ -180,11 +180,14 @@ dlb2_init_port_cos(struct dlb2_eventdev *dlb2, int *port_cos)
>  {
>         int q;
>
> -       for (q = 0; q < DLB2_MAX_NUM_PORTS_ALL; q++)
> -               if (port_cos[q] != DLB2_COS_DEFAULT) {
> -                       dlb2->ev_ports[q].cos_id = port_cos[q];
> +       for (q = 0; q < DLB2_MAX_NUM_PORTS_ALL; q++) {
> +               dlb2->ev_ports[q].cos_id = port_cos[q];
> +               if (port_cos[q] != DLB2_COS_DEFAULT &&
> +                   dlb2->cos_ports[port_cos[q]] < DLB2_MAX_NUM_LDB_PORTS_PER_COS) {
>                         dlb2->cos_ports[port_cos[q]]++;
> +                       dlb2->max_cos_port = q;
>                 }
> +       }
>  }
>
>  static void
> @@ -840,8 +843,9 @@ dlb2_hw_create_sched_domain(struct dlb2_eventdev *dlb2,
>         cos_ports = dlb2->cos_ports[0] + dlb2->cos_ports[1] +
>                     dlb2->cos_ports[2] + dlb2->cos_ports[3];
>
> -       if (cos_ports > resources_asked->num_ldb_ports) {
> -               DLB2_LOG_ERR("dlb2: num_ldb_ports < nonzero cos_ports\n");
> +       if (cos_ports > resources_asked->num_ldb_ports ||
> +           (cos_ports && dlb2->max_cos_port >= resources_asked->num_ldb_ports)) {
> +               DLB2_LOG_ERR("dlb2: num_ldb_ports < cos_ports\n");
>                 ret = EINVAL;
>                 goto error_exit;
>         }
> diff --git a/drivers/event/dlb2/dlb2_priv.h b/drivers/event/dlb2/dlb2_priv.h
> index 9ef5bcb901..03ef15ac51 100644
> --- a/drivers/event/dlb2/dlb2_priv.h
> +++ b/drivers/event/dlb2/dlb2_priv.h
> @@ -93,6 +93,7 @@
>  #define DLB2_NUM_SN_GROUPS 2
>  #define DLB2_MAX_LDB_SN_ALLOC 1024
>  #define DLB2_MAX_QUEUE_DEPTH_THRESHOLD 8191
> +#define DLB2_MAX_NUM_LDB_PORTS_PER_COS (DLB2_MAX_NUM_LDB_PORTS/DLB2_COS_NUM_VALS)
>
>  /* 2048 total hist list entries and 64 total ldb ports, which
>   * makes for 2048/64 == 32 hist list entries per port. However, CQ
> @@ -636,6 +637,7 @@ struct dlb2_eventdev {
>         };
>         uint32_t cos_ports[DLB2_COS_NUM_VALS]; /* total ldb ports in each class */
>         uint32_t cos_bw[DLB2_COS_NUM_VALS]; /* bandwidth per cos domain */
> +       uint8_t max_cos_port; /* Max LDB port from any cos */
>  };
>
>  /* used for collecting and passing around the dev args */
> --
> 2.25.1
>