[PATCH v3 2/2] ice: recap the VSI and QoS info after rebuild

[Aaron Ma <aaron.ma@canonical.com>]

Fix IRDMA hardware initialization timeout (-110) after resume by
separating VSI-dependent configuration from RDMA resource allocation,
ensuring VSI is rebuilt before IRDMA accesses it.

After resume from suspend, IRDMA hardware initialization fails:
  ice: IRDMA hardware initialization FAILED init_state=4 status=-110

Separate RDMA initialization into two phases:
1. ice_init_rdma() - Allocate resources only (no VSI/QoS access, no plug)
2. ice_rdma_finalize_setup() - Assign VSI/QoS info and plug device

This allows:
- ice_init_rdma() to stay in ice_resume() (mirrors ice_deinit_rdma()
  in ice_suspend()
- VSI assignment deferred until after ice_vsi_rebuild() completes
- QoS info updated after ice_dcb_rebuild() completes
- Device plugged only when control queues, VSI, and DCB are all ready

Fixes: bc69ad74867db ("ice: avoid IRQ collision to fix init failure on ACPI S3 resume")
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
---
V1 -> V2: no changes.
V2 -> V3:
- mirrors init_rdma in resume as Tony Nguyen suggested to fix
the memleak and move ice_plug_aux_dev/ice_unplug_aux_dev out of
init/deinit rdma.
- ensure the correct VSI/QoS info is loaded after rebuild.

 drivers/net/ethernet/intel/ice/ice.h      |  1 +
 drivers/net/ethernet/intel/ice/ice_idc.c  | 41 +++++++++++++++++------
 drivers/net/ethernet/intel/ice/ice_main.c |  7 +++-
 3 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 147aaee192a79..6463c1fea7871 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -989,6 +989,7 @@ int ice_schedule_reset(struct ice_pf *pf, enum ice_reset_req reset);
 void ice_print_link_msg(struct ice_vsi *vsi, bool isup);
 int ice_plug_aux_dev(struct ice_pf *pf);
 void ice_unplug_aux_dev(struct ice_pf *pf);
+void ice_rdma_finalize_setup(struct ice_pf *pf);
 int ice_init_rdma(struct ice_pf *pf);
 void ice_deinit_rdma(struct ice_pf *pf);
 bool ice_is_wol_supported(struct ice_hw *hw);
diff --git a/drivers/net/ethernet/intel/ice/ice_idc.c b/drivers/net/ethernet/intel/ice/ice_idc.c
index 420d45c2558b6..b6079a6cb7736 100644
--- a/drivers/net/ethernet/intel/ice/ice_idc.c
+++ b/drivers/net/ethernet/intel/ice/ice_idc.c
@@ -360,6 +360,35 @@ void ice_unplug_aux_dev(struct ice_pf *pf)
 	auxiliary_device_uninit(adev);
 }
 
+/**
+ * ice_rdma_finalize_setup - Complete RDMA setup after VSI is ready
+ * @pf: ptr to ice_pf
+ *
+ * Sets VSI-dependent information and plugs aux device.
+ * Must be called after ice_init_rdma(), ice_vsi_rebuild(), and
+ * ice_dcb_rebuild() complete.
+ */
+void ice_rdma_finalize_setup(struct ice_pf *pf)
+{
+	struct iidc_rdma_priv_dev_info *privd;
+
+	if (!ice_is_rdma_ena(pf) || !pf->cdev_info)
+		return;
+
+	privd = pf->cdev_info->iidc_priv;
+	if (!privd || !pf->vsi[0] || !pf->vsi[0]->netdev)
+		return;
+
+	/* Assign VSI info now that VSI is valid */
+	privd->netdev = pf->vsi[0]->netdev;
+	privd->vport_id = pf->vsi[0]->vsi_num;
+
+	/* Update QoS info after DCB has been rebuilt */
+	ice_setup_dcb_qos_info(pf, &privd->qos_info);
+
+	ice_plug_aux_dev(pf);
+}
+
 /**
  * ice_init_rdma - initializes PF for RDMA use
  * @pf: ptr to ice_pf
@@ -398,23 +427,16 @@ int ice_init_rdma(struct ice_pf *pf)
 	}
 
 	cdev->iidc_priv = privd;
-	privd->netdev = pf->vsi[0]->netdev;
 
 	privd->hw_addr = (u8 __iomem *)pf->hw.hw_addr;
 	cdev->pdev = pf->pdev;
-	privd->vport_id = pf->vsi[0]->vsi_num;
 
 	pf->cdev_info->rdma_protocol |= IIDC_RDMA_PROTOCOL_ROCEV2;
-	ice_setup_dcb_qos_info(pf, &privd->qos_info);
-	ret = ice_plug_aux_dev(pf);
-	if (ret)
-		goto err_plug_aux_dev;
+
 	return 0;
 
-err_plug_aux_dev:
-	pf->cdev_info->adev = NULL;
-	xa_erase(&ice_aux_id, pf->aux_idx);
 err_alloc_xa:
+	xa_erase(&ice_aux_id, pf->aux_idx);
 	kfree(privd);
 err_privd_alloc:
 	kfree(cdev);
@@ -432,7 +454,6 @@ void ice_deinit_rdma(struct ice_pf *pf)
 	if (!ice_is_rdma_ena(pf))
 		return;
 
-	ice_unplug_aux_dev(pf);
 	xa_erase(&ice_aux_id, pf->aux_idx);
 	kfree(pf->cdev_info->iidc_priv);
 	kfree(pf->cdev_info);
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 4bb68e7a00f5f..1851e9932cefe 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -5135,6 +5135,9 @@ int ice_load(struct ice_pf *pf)
 	if (err)
 		goto err_init_rdma;
 
+	/* Finalize RDMA: VSI already created, assign info and plug device */
+	ice_rdma_finalize_setup(pf);
+
 	ice_service_task_restart(pf);
 
 	clear_bit(ICE_DOWN, pf->state);
@@ -5166,6 +5169,7 @@ void ice_unload(struct ice_pf *pf)
 
 	devl_assert_locked(priv_to_devlink(pf));
 
+	ice_unplug_aux_dev(pf);
 	ice_deinit_rdma(pf);
 	ice_deinit_features(pf);
 	ice_tc_indir_block_unregister(vsi);
@@ -5594,6 +5598,7 @@ static int ice_suspend(struct device *dev)
 	 */
 	disabled = ice_service_task_stop(pf);
 
+	ice_unplug_aux_dev(pf);
 	ice_deinit_rdma(pf);
 
 	/* Already suspended?, then there is nothing to do */
@@ -7803,7 +7808,7 @@ static void ice_rebuild(struct ice_pf *pf, enum ice_reset_req reset_type)
 
 	ice_health_clear(pf);
 
-	ice_plug_aux_dev(pf);
+	ice_rdma_finalize_setup(pf);
 	if (ice_is_feature_supported(pf, ICE_F_SRIOV_LAG))
 		ice_lag_rebuild(pf);
 
-- 
2.43.0