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Subject[net-next] octeontx2-pf: QOS: Perform cache sync on send queue teardown
Date
QOS is designed to create a new send queue whenever  a class
is created, ensuring proper shaping and scheduling. However,
when multiple send queues are created and deleted in a loop,
SMMU errors are observed.

This patch addresses the issue by performing an data cache sync
during the teardown of QOS send queues.

Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
---
.../ethernet/marvell/octeontx2/nic/qos_sq.c | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/qos_sq.c b/drivers/net/ethernet/marvell/octeontx2/nic/qos_sq.c
index c5dbae0e513b..58d572ce08ef 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/qos_sq.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/qos_sq.c
@@ -256,6 +256,26 @@ int otx2_qos_enable_sq(struct otx2_nic *pfvf, int qidx)
return err;
}

+static int otx2_qos_nix_npa_ndc_sync(struct otx2_nic *pfvf)
+{
+ struct ndc_sync_op *req;
+ int rc;
+
+ mutex_lock(&pfvf->mbox.lock);
+
+ req = otx2_mbox_alloc_msg_ndc_sync_op(&pfvf->mbox);
+ if (!req) {
+ mutex_unlock(&pfvf->mbox.lock);
+ return -ENOMEM;
+ }
+
+ req->nix_lf_tx_sync = true;
+ req->npa_lf_sync = true;
+ rc = otx2_sync_mbox_msg(&pfvf->mbox);
+ mutex_unlock(&pfvf->mbox.lock);
+ return rc;
+}
+
void otx2_qos_disable_sq(struct otx2_nic *pfvf, int qidx)
{
struct otx2_qset *qset = &pfvf->qset;
@@ -285,6 +305,8 @@ void otx2_qos_disable_sq(struct otx2_nic *pfvf, int qidx)

otx2_qos_sqb_flush(pfvf, sq_idx);
otx2_smq_flush(pfvf, otx2_get_smq_idx(pfvf, sq_idx));
+ /* NIX/NPA NDC sync */
+ otx2_qos_nix_npa_ndc_sync(pfvf);
otx2_cleanup_tx_cqes(pfvf, cq);

mutex_lock(&pfvf->mbox.lock);
--
2.34.1

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