netdev - [PATCH net-next 10/15] ice: allow changing SWITCHDEV

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Date: Tue, 14 Nov 2023 10:14:30 -0800
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
	anthony.l.nguyen@...el.com,
	wojciech.drewek@...el.com,
	marcin.szycik@...el.com,
	piotr.raczynski@...el.com,
	Jacob Keller <jacob.e.keller@...el.com>,
	Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Subject: [PATCH net-next 10/15] ice: allow changing SWITCHDEV_CTRL VSI queues

From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>

Implement mechanism to change number of queues for SWITCHDEV_CTRL VSI
type.

Value from ::req_txq/rxq will be written to ::alloc_txq/rxq after
calling ice_vsi_rebuild().

Reviewed-by: Piotr Raczynski <piotr.raczynski@...el.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>
Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_lib.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index ae4b4220e1bb..85a8cb28a489 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -212,11 +212,18 @@ static void ice_vsi_set_num_qs(struct ice_vsi *vsi)
 						 vsi->alloc_txq));
 		break;
 	case ICE_VSI_SWITCHDEV_CTRL:
-		/* The number of queues for ctrl VSI is equal to number of VFs.
+		/* The number of queues for ctrl VSI is equal to number of PRs
 		 * Each ring is associated to the corresponding VF_PR netdev.
+		 * Tx and Rx rings are always equal
 		 */
-		vsi->alloc_txq = ice_get_num_vfs(pf);
-		vsi->alloc_rxq = vsi->alloc_txq;
+		if (vsi->req_txq && vsi->req_rxq) {
+			vsi->alloc_txq = vsi->req_txq;
+			vsi->alloc_rxq = vsi->req_rxq;
+		} else {
+			vsi->alloc_txq = 1;
+			vsi->alloc_rxq = 1;
+		}
+
 		vsi->num_q_vectors = 1;
 		break;
 	case ICE_VSI_VF:
-- 
2.41.0