MFC [Hyper-V]: r294553, r294700

r294553

hyperv/vmbus: Lookup channel through id table

Vmbus event handler will need to find the channel by its relative
id, when software interrupt for event happens.  The original lookup
searches the channel list, which is not very efficient.  We now
create a table indexed by the channel relative id to speed up
the channel lookup.

Submitted by:           Hongjiang Zhang <honzhan microsoft com>
Reviewed by:            delphij, adrain, sephe, Dexuan Cui <decui microsoft com>
Approved by:            adrian (mentor)
Sponsored by:           Microsoft OSTC
Differential Revision:  https://reviews.freebsd.org/D4802

-------------

r294700

hyperv/hn: Partly rework transmission path

- Avoid unnecessary malloc/free on transmission path.
- busdma(9)-fy transmission path.
- Properly handle IFF_DRV_OACTIVE.  This should fix the network
  stalls reported by many.
- Properly setup TSO parameters.
- Properly handle bpf(4) tapping.  This 5 times the performance
  during TCP sending test, when there is one bpf(4) attached.
- Allow size of chimney sending be tuned on a running system.
  Default value still needs more test to determine.

Reviewed by:            adrian, delphij
Approved by:            adrian (mentor)
Sponsored by:           Microsoft OSTC
Differential Revision:  https://reviews.freebsd.org/D4972

Approved by:	re (marius)
Sponsored by:	Microsoft OSTC

1 files changed, 25 insertions, 1 deletions

diff --git a/sys/dev/hyperv/netvsc/hv_net_vsc.h b/sys/dev/hyperv/netvsc/hv_net_vsc.h
index 4e63b94..e684cc5 100644
--- a/sys/dev/hyperv/netvsc/hv_net_vsc.h
+++ b/sys/dev/hyperv/netvsc/hv_net_vsc.h
@@ -38,12 +38,16 @@
 #ifndef __HV_NET_VSC_H__
 #define __HV_NET_VSC_H__
 
-#include <sys/types.h>
 #include <sys/param.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>
+#include <sys/queue.h>
 #include <sys/sx.h>
 
+#include <machine/bus.h>
+#include <sys/bus.h>
+#include <sys/bus_dma.h>
+
 #include <netinet/in.h>
 #include <netinet/tcp_lro.h>
 
@@ -984,6 +988,9 @@ typedef struct {
 	hv_bool_uint8_t	link_state;
 } netvsc_device_info;
 
+struct hn_txdesc;
+SLIST_HEAD(hn_txdesc_list, hn_txdesc);
+
 /*
  * Device-specific softc structure
  */
@@ -1002,6 +1009,18 @@ typedef struct hn_softc {
 	struct hv_device  *hn_dev_obj;
 	netvsc_dev  	*net_dev;
 
+	int		hn_txdesc_cnt;
+	struct hn_txdesc *hn_txdesc;
+	bus_dma_tag_t	hn_tx_data_dtag;
+	bus_dma_tag_t	hn_tx_rndis_dtag;
+	int		hn_tx_chimney_size;
+	int		hn_tx_chimney_max;
+
+	struct mtx	hn_txlist_spin;
+	struct hn_txdesc_list hn_txlist;
+	int		hn_txdesc_avail;
+	int		hn_txeof;
+
 	struct lro_ctrl	hn_lro;
 	int		hn_lro_hiwat;
 
@@ -1013,6 +1032,11 @@ typedef struct hn_softc {
 	u_long		hn_csum_trusted;
 	u_long		hn_lro_tried;
 	u_long		hn_small_pkts;
+	u_long		hn_no_txdescs;
+	u_long		hn_send_failed;
+	u_long		hn_txdma_failed;
+	u_long		hn_tx_collapsed;
+	u_long		hn_tx_chimney;
 } hn_softc_t;