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Index: sys/dev/vnic/nicvf_main.c
===================================================================
--- sys/dev/vnic/nicvf_main.c
+++ sys/dev/vnic/nicvf_main.c
@@ -679,17 +679,16 @@
}
}
+ err = drbr_enqueue(ifp, sq->br, mbuf);
+ if (err != 0)
+ return (err);
+
if (NICVF_TX_TRYLOCK(sq) != 0) {
- err = nicvf_tx_mbuf_locked(sq, mbuf);
+ err = nicvf_xmit_locked(sq);
NICVF_TX_UNLOCK(sq);
return (err);
- } else {
- err = drbr_enqueue(ifp, sq->br, mbuf);
- if (err != 0)
- return (err);
-
+ } else
taskqueue_enqueue(sq->snd_taskq, &sq->snd_task);
- }
return (0);
}
Index: sys/dev/vnic/nicvf_queues.h
===================================================================
--- sys/dev/vnic/nicvf_queues.h
+++ sys/dev/vnic/nicvf_queues.h
@@ -388,7 +388,7 @@
void nicvf_clear_intr(struct nicvf *, int, int);
int nicvf_is_intr_enabled(struct nicvf *, int, int);
-int nicvf_tx_mbuf_locked(struct snd_queue *, struct mbuf *);
+int nicvf_xmit_locked(struct snd_queue *sq);
/* Register access APIs */
void nicvf_reg_write(struct nicvf *, uint64_t, uint64_t);
Index: sys/dev/vnic/nicvf_queues.c
===================================================================
--- sys/dev/vnic/nicvf_queues.c
+++ sys/dev/vnic/nicvf_queues.c
@@ -61,11 +61,12 @@
#include <machine/bus.h>
#include <machine/vmparam.h>
-#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/ifq.h>
+#include <net/bpf.h>
+#include <net/ethernet.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
@@ -106,6 +107,8 @@
boolean_t);
static void nicvf_sq_free_used_descs(struct nicvf *, struct snd_queue *, int);
+static int nicvf_tx_mbuf_locked(struct snd_queue *, struct mbuf **);
+
static void nicvf_rbdr_task(void *, int);
static void nicvf_rbdr_task_nowait(void *, int);
@@ -992,25 +995,48 @@
memset(cq->mtx_name, 0, sizeof(cq->mtx_name));
}
-static void
-nicvf_snd_task(void *arg, int pending)
+int
+nicvf_xmit_locked(struct snd_queue *sq)
{
- struct snd_queue *sq = (struct snd_queue *)arg;
- struct mbuf *mbuf;
+ struct nicvf *nic;
+ struct ifnet *ifp;
+ struct mbuf *next;
+ int err;
- NICVF_TX_LOCK(sq);
- while (1) {
- mbuf = drbr_dequeue(NULL, sq->br);
- if (mbuf == NULL)
- break;
+ NICVF_TX_LOCK_ASSERT(sq);
+
+ nic = sq->nic;
+ ifp = nic->ifp;
+
+ while ((next = drbr_peek(ifp, sq->br)) != NULL) {
+ err = nicvf_tx_mbuf_locked(sq, &next);
+ if (err != 0) {
+ if (next == NULL)
+ drbr_advance(ifp, sq->br);
+ else
+ drbr_putback(ifp, sq->br, next);
- if (nicvf_tx_mbuf_locked(sq, mbuf) != 0) {
- /* XXX ARM64TODO: Increase Tx drop counter */
- m_freem(mbuf);
break;
}
+ drbr_advance(ifp, sq->br);
+ /* Send a copy of the frame to the BPF listener */
+ ETHER_BPF_MTAP(ifp, next);
}
+ return (err);
+}
+
+static void
+nicvf_snd_task(void *arg, int pending)
+{
+ struct snd_queue *sq = (struct snd_queue *)arg;
+ int err;
+
+ NICVF_TX_LOCK(sq);
+ err = nicvf_xmit_locked(sq);
NICVF_TX_UNLOCK(sq);
+ /* Try again */
+ if (err != 0)
+ taskqueue_enqueue(sq->snd_taskq, &sq->snd_task);
}
/* Initialize transmit queue */
@@ -1864,8 +1890,8 @@
}
/* Put an mbuf to a SQ for packet transfer. */
-int
-nicvf_tx_mbuf_locked(struct snd_queue *sq, struct mbuf *mbuf)
+static int
+nicvf_tx_mbuf_locked(struct snd_queue *sq, struct mbuf **mbufp)
{
bus_dma_segment_t segs[256];
struct nicvf *nic;
@@ -1883,15 +1909,17 @@
snd_buff = &sq->snd_buff[sq->tail];
err = bus_dmamap_load_mbuf_sg(sq->snd_buff_dmat, snd_buff->dmap,
- mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
- if (err != 0) {
+ *mbufp, segs, &nsegs, BUS_DMA_NOWAIT);
+ if (__predict_false(err != 0)) {
/* ARM64TODO: Add mbuf defragmenting if we lack maps */
+ m_freem(*mbufp);
+ *mbufp = NULL;
return (err);
}
/* Set how many subdescriptors is required */
nic = sq->nic;
- if (mbuf->m_pkthdr.tso_segsz != 0 && nic->hw_tso)
+ if ((*mbufp)->m_pkthdr.tso_segsz != 0 && nic->hw_tso)
subdesc_cnt = MIN_SQ_DESC_PER_PKT_XMIT;
else
subdesc_cnt = MIN_SQ_DESC_PER_PKT_XMIT + nsegs - 1;
@@ -1905,10 +1933,13 @@
qentry = nicvf_get_sq_desc(sq, subdesc_cnt);
/* Add SQ header subdesc */
- err = nicvf_sq_add_hdr_subdesc(sq, qentry, subdesc_cnt - 1, mbuf,
- mbuf->m_pkthdr.len);
+ err = nicvf_sq_add_hdr_subdesc(sq, qentry, subdesc_cnt - 1, *mbufp,
+ (*mbufp)->m_pkthdr.len);
if (err != 0) {
+ nicvf_put_sq_desc(sq, subdesc_cnt);
bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap);
+ if (err == ENOBUFS)
+ *mbufp = NULL;
return (err);
}

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