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hyperv: set receive buffer size according to NVSP protocol version

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If the NVSP protocol version is not greater than NVSP_PROTOCOL_VERSION_2,
then the recv buffer size is 15MB, otherwise the buffer size is 16MB.

Submitted by:		Hongjiang Zhang <honzhan microsoft com>
Reviewed by:		royger, Dexuan Cui <decui microsoft com>, adrian
Approved by:		adrian (mentor)
Sponsored by:		Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D4814
This commit is contained in:
Sepherosa Ziehau 2016-01-14 03:16:29 +00:00
parent 1952924333
commit dd7a7dd6af
2 changed files with 7 additions and 4 deletions
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9
sys/dev/hyperv/netvsc/hv_net_vsc.c
View File

@ -642,6 +642,12 @@ hv_nv_connect_to_vsp(struct hv_device *device)
/* sema_wait(&NetVscChannel->channel_init_sema); */
/* Post the big receive buffer to NetVSP */
if (net_dev->nvsp_version <= NVSP_PROTOCOL_VERSION_2)
net_dev->rx_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY;
else
net_dev->rx_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
net_dev->send_buf_size = NETVSC_SEND_BUFFER_SIZE;
ret = hv_nv_init_rx_buffer_with_net_vsp(device);
if (ret == 0)
ret = hv_nv_init_send_buffer_with_net_vsp(device);
@ -676,9 +682,6 @@ hv_nv_on_device_add(struct hv_device *device, void *additional_info)
goto cleanup;
/* Initialize the NetVSC channel extension */
net_dev->rx_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
net_dev->send_buf_size = NETVSC_SEND_BUFFER_SIZE;
sema_init(&net_dev->channel_init_sema, 0, "netdev_sema");

2
sys/dev/hyperv/netvsc/hv_net_vsc.h
View File

@ -857,7 +857,7 @@ typedef struct nvsp_msg_ {
#define NETVSC_SEND_BUFFER_SIZE (1024*1024*15) /* 15M */
#define NETVSC_SEND_BUFFER_ID 0xface
#define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024*1024*15) /* 15MB */
#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */
#define NETVSC_RECEIVE_BUFFER_ID 0xcafe