diff mbox series

[net-next,02/15] ice: Fix issue reclaiming resources back to the pool after reset

Message ID 20190322173328.2493-3-jeffrey.t.kirsher@intel.com
State Accepted
Delegated to: David Miller
Headers show
Series 100GbE Intel Wired LAN Driver Updates 2019-03-22 | expand

Commit Message

Kirsher, Jeffrey T March 22, 2019, 5:33 p.m. UTC 
From: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>

This patch fixes issue reclaiming VF resources back to the pool after
reset - Since we only allocate HW vector for all VFs and track together
with resources allocation for PF with ice_search_res, we need to free VFs
resources separately, using first VF vector index to traverse the list.
Otherwise tracker starts from the last assigned vectors list and causes
maximum supported number of HW vectors, 1024 to be exhausted, depending on
the number of VFs enabled, which causes a lot of unwanted issues, and
failed to reassign vectors for VFs.

Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_lib.c | 26 +++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index e3b44d413d5f..4763df009ed1 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2655,6 +2655,7 @@  int ice_vsi_release(struct ice_vsi *vsi)
 int ice_vsi_rebuild(struct ice_vsi *vsi)
 {
 	u16 max_txqs[ICE_MAX_TRAFFIC_CLASS] = { 0 };
+	struct ice_vf *vf = NULL;
 	struct ice_pf *pf;
 	int ret, i;
 
@@ -2662,12 +2663,31 @@  int ice_vsi_rebuild(struct ice_vsi *vsi)
 		return -EINVAL;
 
 	pf = vsi->back;
+	if (vsi->type == ICE_VSI_VF)
+		vf = &pf->vf[vsi->vf_id];
+
 	ice_rm_vsi_lan_cfg(vsi->port_info, vsi->idx);
 	ice_vsi_free_q_vectors(vsi);
-	ice_free_res(vsi->back->sw_irq_tracker, vsi->sw_base_vector, vsi->idx);
-	ice_free_res(vsi->back->hw_irq_tracker, vsi->hw_base_vector, vsi->idx);
-	vsi->sw_base_vector = 0;
+
+	if (vsi->type != ICE_VSI_VF) {
+		/* reclaim SW interrupts back to the common pool */
+		ice_free_res(pf->sw_irq_tracker, vsi->sw_base_vector, vsi->idx);
+		pf->num_avail_sw_msix += vsi->num_q_vectors;
+		vsi->sw_base_vector = 0;
+		/* reclaim HW interrupts back to the common pool */
+		ice_free_res(pf->hw_irq_tracker, vsi->hw_base_vector,
+			     vsi->idx);
+		pf->num_avail_hw_msix += vsi->num_q_vectors;
+	} else {
+		/* Reclaim VF resources back to the common pool for reset and
+		 * and rebuild, with vector reassignment
+		 */
+		ice_free_res(pf->hw_irq_tracker, vf->first_vector_idx,
+			     vsi->idx);
+		pf->num_avail_hw_msix += pf->num_vf_msix;
+	}
 	vsi->hw_base_vector = 0;
+
 	ice_vsi_clear_rings(vsi);
 	ice_vsi_free_arrays(vsi, false);
 	ice_dev_onetime_setup(&vsi->back->hw);