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hyperv/vmbus: Add functions to test RX/TX bufring emptiness

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MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8044
This commit is contained in:
Sepherosa Ziehau 2016-09-28 04:08:20 +00:00
parent 92a85eb9d7
commit e8223cc6cf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=306387
3 changed files with 30 additions and 0 deletions
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2
sys/dev/hyperv/include/vmbus.h
View File

@ -173,5 +173,7 @@ const struct hyperv_guid *
vmbus_chan_guid_inst(const struct vmbus_channel *chan);
int vmbus_chan_prplist_nelem(int br_size, int prpcnt_max,
int dlen_max);
bool vmbus_chan_rx_empty(const struct vmbus_channel *chan);
bool vmbus_chan_tx_empty(const struct vmbus_channel *chan);
#endif /* !_VMBUS_H_ */

14
sys/dev/hyperv/vmbus/vmbus_brvar.h
View File

@ -83,6 +83,20 @@ vmbus_txbr_maxpktsz(const struct vmbus_txbr *tbr)
return (tbr->txbr_dsize - sizeof(uint64_t) - 1);
}
static __inline bool
vmbus_txbr_empty(const struct vmbus_txbr *tbr)
{
return (tbr->txbr_windex == tbr->txbr_rindex ? true : false);
}
static __inline bool
vmbus_rxbr_empty(const struct vmbus_rxbr *rbr)
{
return (rbr->rxbr_windex == rbr->rxbr_rindex ? true : false);
}
static __inline int
vmbus_br_nelem(int br_size, int elem_size)
{

14
sys/dev/hyperv/vmbus/vmbus_chan.c
View File

@ -1692,3 +1692,17 @@ vmbus_chan_prplist_nelem(int br_size, int prpcnt_max, int dlen_max)
return (vmbus_br_nelem(br_size, elem_size));
}
bool
vmbus_chan_tx_empty(const struct vmbus_channel *chan)
{
return (vmbus_txbr_empty(&chan->ch_txbr));
}
bool
vmbus_chan_rx_empty(const struct vmbus_channel *chan)
{
return (vmbus_rxbr_empty(&chan->ch_rxbr));
}