svn commit: r362621 - head/sys/net

[Vincenzo Maffione]

Author: vmaffione
Date: Thu Jun 25 19:35:43 2020
New Revision: 362621
URL: https://svnweb.freebsd.org/changeset/base/362621

Log:
  iflib: netmap: add per-tx-queue netmap support
  
  Reviewed by:	gallatin
  MFC after:	2 weeks
  Differential Revision:	https://reviews.freebsd.org/D25253

Modified:
  head/sys/net/iflib.c

Modified: head/sys/net/iflib.c
==============================================================================
--- head/sys/net/iflib.c	Thu Jun 25 19:35:37 2020	(r362620)
+++ head/sys/net/iflib.c	Thu Jun 25 19:35:43 2020	(r362621)
@@ -1235,7 +1235,9 @@ iflib_netmap_timer_adjust(if_ctx_t ctx, iflib_txq_t tx
 	uint16_t txqid;
 
 	txqid = txq->ift_id;
-	kring = NA(ctx->ifc_ifp)->tx_rings[txqid];
+	kring = netmap_kring_on(NA(ctx->ifc_ifp), txqid, NR_TX);
+	if (kring == NULL)
+		return;
 
 	if (kring->nr_hwcur != nm_next(kring->nr_hwtail, kring->nkr_num_slots - 1)) {
 		bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
@@ -3756,20 +3758,12 @@ _task_fn_tx(void *context)
 #ifdef IFLIB_DIAGNOSTICS
 	txq->ift_cpu_exec_count[curcpu]++;
 #endif
-	if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+	if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
 		return;
 #ifdef DEV_NETMAP
-	if (if_getcapenable(ifp) & IFCAP_NETMAP) {
-		bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
-		    BUS_DMASYNC_POSTREAD);
-		if (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, false))
-			netmap_tx_irq(ifp, txq->ift_id);
-		if (ctx->ifc_flags & IFC_LEGACY)
-			IFDI_INTR_ENABLE(ctx);
-		else
-			IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
-		return;
-	}
+	if ((if_getcapenable(ifp) & IFCAP_NETMAP) &&
+	    netmap_tx_irq(ifp, txq->ift_id))
+		goto skip_ifmp;
 #endif
 #ifdef ALTQ
 	if (ALTQ_IS_ENABLED(&ifp->if_snd))
@@ -3784,6 +3778,9 @@ _task_fn_tx(void *context)
 	 */
 	if (abdicate)
 		ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
+#ifdef DEV_NETMAP
+skip_ifmp:
+#endif
 	if (ctx->ifc_flags & IFC_LEGACY)
 		IFDI_INTR_ENABLE(ctx);
 	else