svn commit: r333288 - head/sys/dev/cxgb

[Mark Johnston]

Author: markj
Date: Sun May  6 00:48:43 2018
New Revision: 333288
URL: https://svnweb.freebsd.org/changeset/base/333288

Log:
  Add netdump support to cxgb(4).
  
  Tested with a T320 adapter.
  
  Reviewed by:	np
  MFC after:	1 month
  Sponsored by:	Dell EMC Isilon
  Differential Revision:	https://reviews.freebsd.org/D15258

Modified:
  head/sys/dev/cxgb/cxgb_adapter.h
  head/sys/dev/cxgb/cxgb_main.c
  head/sys/dev/cxgb/cxgb_sge.c

Modified: head/sys/dev/cxgb/cxgb_adapter.h
==============================================================================
--- head/sys/dev/cxgb/cxgb_adapter.h	Sun May  6 00:47:39 2018	(r333287)
+++ head/sys/dev/cxgb/cxgb_adapter.h	Sun May  6 00:48:43 2018	(r333288)
@@ -576,4 +576,11 @@ int cxgb_transmit(struct ifnet *ifp, struct mbuf *m);
 void cxgb_qflush(struct ifnet *ifp);
 void t3_iterate(void (*)(struct adapter *, void *), void *);
 void cxgb_refresh_stats(struct port_info *);
+
+#ifdef NETDUMP
+int cxgb_netdump_encap(struct sge_qset *qs, struct mbuf **m);
+int cxgb_netdump_poll_rx(adapter_t *adap, struct sge_qset *qs);
+int cxgb_netdump_poll_tx(struct sge_qset *qs);
+#endif
+
 #endif

Modified: head/sys/dev/cxgb/cxgb_main.c
==============================================================================
--- head/sys/dev/cxgb/cxgb_main.c	Sun May  6 00:47:39 2018	(r333287)
+++ head/sys/dev/cxgb/cxgb_main.c	Sun May  6 00:48:43 2018	(r333288)
@@ -74,6 +74,7 @@ __FBSDID("$FreeBSD$");
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 #include <netinet/udp.h>
+#include <netinet/netdump/netdump.h>
 
 #include <dev/pci/pcireg.h>
 #include <dev/pci/pcivar.h>
@@ -191,6 +192,8 @@ static devclass_t	cxgb_port_devclass;
 DRIVER_MODULE(cxgb, cxgbc, cxgb_port_driver, cxgb_port_devclass, 0, 0);
 MODULE_VERSION(cxgb, 1);
 
+NETDUMP_DEFINE(cxgb);
+
 static struct mtx t3_list_lock;
 static SLIST_HEAD(, adapter) t3_list;
 #ifdef TCP_OFFLOAD
@@ -1045,6 +1048,9 @@ cxgb_port_attach(device_t dev)
 
 	ether_ifattach(ifp, p->hw_addr);
 
+	/* Attach driver netdump methods. */
+	NETDUMP_SET(ifp, cxgb);
+
 #ifdef DEFAULT_JUMBO
 	if (sc->params.nports <= 2)
 		ifp->if_mtu = ETHERMTU_JUMBO;
@@ -3578,3 +3584,72 @@ cxgbc_mod_event(module_t mod, int cmd, void *arg)
 
 	return (rc);
 }
+
+#ifdef NETDUMP
+static void
+cxgb_netdump_init(struct ifnet *ifp, int *nrxr, int *ncl, int *clsize)
+{
+	struct port_info *pi;
+	adapter_t *adap;
+
+	pi = if_getsoftc(ifp);
+	adap = pi->adapter;
+	ADAPTER_LOCK(adap);
+	*nrxr = SGE_QSETS;
+	*ncl = adap->sge.qs[0].fl[1].size;
+	*clsize = adap->sge.qs[0].fl[1].buf_size;
+	ADAPTER_UNLOCK(adap);
+}
+
+static void
+cxgb_netdump_event(struct ifnet *ifp, enum netdump_ev event)
+{
+	struct port_info *pi;
+	struct sge_qset *qs;
+	int i;
+
+	pi = if_getsoftc(ifp);
+	if (event == NETDUMP_START)
+		for (i = 0; i < SGE_QSETS; i++) {
+			qs = &pi->adapter->sge.qs[i];
+
+			/* Need to reinit after netdump_mbuf_dump(). */
+			qs->fl[0].zone = zone_pack;
+			qs->fl[1].zone = zone_clust;
+			qs->lro.enabled = 0;
+		}
+}
+
+static int
+cxgb_netdump_transmit(struct ifnet *ifp, struct mbuf *m)
+{
+	struct port_info *pi;
+	struct sge_qset *qs;
+
+	pi = if_getsoftc(ifp);
+	if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
+	    IFF_DRV_RUNNING)
+		return (ENOENT);
+
+	qs = &pi->adapter->sge.qs[pi->first_qset];
+	return (cxgb_netdump_encap(qs, &m));
+}
+
+static int
+cxgb_netdump_poll(struct ifnet *ifp, int count)
+{
+	struct port_info *pi;
+	adapter_t *adap;
+	int i;
+
+	pi = if_getsoftc(ifp);
+	if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0)
+		return (ENOENT);
+
+	adap = pi->adapter;
+	for (i = 0; i < SGE_QSETS; i++)
+		(void)cxgb_netdump_poll_rx(adap, &adap->sge.qs[i]);
+	(void)cxgb_netdump_poll_tx(&adap->sge.qs[pi->first_qset]);
+	return (0);
+}
+#endif /* NETDUMP */

Modified: head/sys/dev/cxgb/cxgb_sge.c
==============================================================================
--- head/sys/dev/cxgb/cxgb_sge.c	Sun May  6 00:47:39 2018	(r333287)
+++ head/sys/dev/cxgb/cxgb_sge.c	Sun May  6 00:48:43 2018	(r333288)
@@ -390,6 +390,15 @@ reclaim_completed_tx(struct sge_qset *qs, int reclaim_
 	return (reclaim);
 }
 
+#ifdef NETDUMP
+int
+cxgb_netdump_poll_tx(struct sge_qset *qs)
+{
+
+	return (reclaim_completed_tx(qs, TX_RECLAIM_MAX, TXQ_ETH));
+}
+#endif
+
 /**
  *	should_restart_tx - are there enough resources to restart a Tx queue?
  *	@q: the Tx queue
@@ -1586,6 +1595,23 @@ t3_encap(struct sge_qset *qs, struct mbuf **m)
 	return (0);
 }
 
+#ifdef NETDUMP
+int
+cxgb_netdump_encap(struct sge_qset *qs, struct mbuf **m)
+{
+	int error;
+
+	error = t3_encap(qs, m);
+	if (error == 0)
+		check_ring_tx_db(qs->port->adapter, &qs->txq[TXQ_ETH], 1);
+	else if (*m != NULL) {
+		m_freem(*m);
+		*m = NULL;
+	}
+	return (error);
+}
+#endif
+
 void
 cxgb_tx_watchdog(void *arg)
 {
@@ -3014,6 +3040,14 @@ process_responses_gts(adapter_t *adap, struct sge_rspq
 	return (work);
 }
 
+#ifdef NETDUMP
+int
+cxgb_netdump_poll_rx(adapter_t *adap, struct sge_qset *qs)
+{
+
+	return (process_responses_gts(adap, &qs->rspq));
+}
+#endif
 
 /*
  * Interrupt handler for legacy INTx interrupts for T3B-based cards.