diff mbox series

[net-next,v2,3/4] bnxt_en: stop packet flow during bnxt_queue_stop/start

Message ID 20240731131542.3359733-4-dw@davidwei.uk (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series fix bnxt_en queue reset when queue is active | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 42 this patch: 42
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 43 this patch: 43
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 45 this patch: 45
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 45 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 2 this patch: 2
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-01--06-00 (tests: 707)

Commit Message

David Wei July 31, 2024, 1:15 p.m. UTC 
The current implementation when resetting a queue while packets are
flowing puts the queue into an inconsistent state.

There needs to be some synchronisation with the FW. Add calls to
bnxt_hwrm_vnic_update() to set the MRU for both the default and ntuple
vnic during queue start/stop. When the MRU is set to 0, flow is stopped.
Each Rx queue belongs to either the default or the ntuple vnic.

With calling bnxt_hwrm_vnic_update() the calls to napi_enable() and
napi_disable() must be removed for reset to work on a queue that has
active traffic flowing e.g. iperf3.

Co-developed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: David Wei <dw@davidwei.uk>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 8822d7a17fbf..ce60c9322fe6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -15172,7 +15172,8 @@  static int bnxt_queue_start(struct net_device *dev, void *qmem, int idx)
 	struct bnxt *bp = netdev_priv(dev);
 	struct bnxt_rx_ring_info *rxr, *clone;
 	struct bnxt_cp_ring_info *cpr;
-	int rc;
+	struct bnxt_vnic_info *vnic;
+	int i, rc;
 
 	rxr = &bp->rx_ring[idx];
 	clone = qmem;
@@ -15197,11 +15198,16 @@  static int bnxt_queue_start(struct net_device *dev, void *qmem, int idx)
 	if (bp->flags & BNXT_FLAG_AGG_RINGS)
 		bnxt_db_write(bp, &rxr->rx_agg_db, rxr->rx_agg_prod);
 
-	napi_enable(&rxr->bnapi->napi);
-
 	cpr = &rxr->bnapi->cp_ring;
 	cpr->sw_stats->rx.rx_resets++;
 
+	for (i = 0; i <= BNXT_VNIC_NTUPLE; i++) {
+		vnic = &bp->vnic_info[i];
+		vnic->mru = bp->dev->mtu + ETH_HLEN + VLAN_HLEN;
+		bnxt_hwrm_vnic_update(bp, vnic,
+				      VNIC_UPDATE_REQ_ENABLES_MRU_VALID);
+	}
+
 	return 0;
 
 err_free_hwrm_rx_ring:
@@ -15213,9 +15219,17 @@  static int bnxt_queue_stop(struct net_device *dev, void *qmem, int idx)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	struct bnxt_rx_ring_info *rxr;
+	struct bnxt_vnic_info *vnic;
+	int i;
+
+	for (i = 0; i <= BNXT_VNIC_NTUPLE; i++) {
+		vnic = &bp->vnic_info[i];
+		vnic->mru = 0;
+		bnxt_hwrm_vnic_update(bp, vnic,
+				      VNIC_UPDATE_REQ_ENABLES_MRU_VALID);
+	}
 
 	rxr = &bp->rx_ring[idx];
-	napi_disable(&rxr->bnapi->napi);
 	bnxt_hwrm_rx_ring_free(bp, rxr, false);
 	bnxt_hwrm_rx_agg_ring_free(bp, rxr, false);
 	rxr->rx_next_cons = 0;