hyperv/hn: Add HN_DEBUG kernel option.
If bufring is used for per-TX ring descs, don't update "available" counter, which is only used to help debugging. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8674
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=309346
@ -1001,3 +1001,5 @@ EVDEV_SUPPORT opt_evdev.h
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EVDEV_DEBUG opt_evdev.h
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EVDEV_DEBUG opt_evdev.h
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UINPUT_DEBUG opt_evdev.h
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UINPUT_DEBUG opt_evdev.h
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# Hyper-V network driver
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HN_DEBUG opt_hn.h
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@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$");
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#include "opt_inet6.h"
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#include "opt_inet6.h"
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#include "opt_inet.h"
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#include "opt_inet.h"
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#include "opt_hn.h"
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#include <sys/param.h>
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/bus.h>
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@ -1428,10 +1429,12 @@ hn_txdesc_put(struct hn_tx_ring *txr, struct hn_txdesc *txd)
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txr->hn_txdesc_avail++;
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txr->hn_txdesc_avail++;
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SLIST_INSERT_HEAD(&txr->hn_txlist, txd, link);
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SLIST_INSERT_HEAD(&txr->hn_txlist, txd, link);
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mtx_unlock_spin(&txr->hn_txlist_spin);
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mtx_unlock_spin(&txr->hn_txlist_spin);
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#else
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#else /* HN_USE_TXDESC_BUFRING */
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#ifdef HN_DEBUG
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atomic_add_int(&txr->hn_txdesc_avail, 1);
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atomic_add_int(&txr->hn_txdesc_avail, 1);
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buf_ring_enqueue(txr->hn_txdesc_br, txd);
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#endif
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#endif
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buf_ring_enqueue(txr->hn_txdesc_br, txd);
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#endif /* !HN_USE_TXDESC_BUFRING */
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return 1;
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return 1;
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}
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}
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@ -1457,8 +1460,10 @@ hn_txdesc_get(struct hn_tx_ring *txr)
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if (txd != NULL) {
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if (txd != NULL) {
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#ifdef HN_USE_TXDESC_BUFRING
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#ifdef HN_USE_TXDESC_BUFRING
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#ifdef HN_DEBUG
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atomic_subtract_int(&txr->hn_txdesc_avail, 1);
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atomic_subtract_int(&txr->hn_txdesc_avail, 1);
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#endif
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#endif
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#endif /* HN_USE_TXDESC_BUFRING */
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KASSERT(txd->m == NULL && txd->refs == 0 &&
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KASSERT(txd->m == NULL && txd->refs == 0 &&
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STAILQ_EMPTY(&txd->agg_list) &&
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STAILQ_EMPTY(&txd->agg_list) &&
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txd->chim_index == HN_NVS_CHIM_IDX_INVALID &&
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txd->chim_index == HN_NVS_CHIM_IDX_INVALID &&
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@ -3467,9 +3472,11 @@ hn_tx_ring_create(struct hn_softc *sc, int id)
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if (txr->hn_tx_sysctl_tree != NULL) {
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if (txr->hn_tx_sysctl_tree != NULL) {
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child = SYSCTL_CHILDREN(txr->hn_tx_sysctl_tree);
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child = SYSCTL_CHILDREN(txr->hn_tx_sysctl_tree);
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#ifdef HN_DEBUG
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SYSCTL_ADD_INT(ctx, child, OID_AUTO, "txdesc_avail",
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SYSCTL_ADD_INT(ctx, child, OID_AUTO, "txdesc_avail",
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CTLFLAG_RD, &txr->hn_txdesc_avail, 0,
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CTLFLAG_RD, &txr->hn_txdesc_avail, 0,
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"# of available TX descs");
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"# of available TX descs");
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#endif
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#ifdef HN_IFSTART_SUPPORT
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#ifdef HN_IFSTART_SUPPORT
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if (!hn_use_if_start)
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if (!hn_use_if_start)
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#endif
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#endif
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@ -5,7 +5,7 @@
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KMOD= hv_netvsc
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KMOD= hv_netvsc
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SRCS= hn_nvs.c hn_rndis.c if_hn.c
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SRCS= hn_nvs.c hn_rndis.c if_hn.c
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SRCS+= bus_if.h device_if.h opt_inet.h opt_inet6.h vmbus_if.h
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SRCS+= bus_if.h device_if.h opt_inet.h opt_inet6.h vmbus_if.h opt_hn.h
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CFLAGS+= -I${.CURDIR}/../../../dev/hyperv/netvsc
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CFLAGS+= -I${.CURDIR}/../../../dev/hyperv/netvsc
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