hyperv: set receive buffer size according to NVSP protocol version
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
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@ -642,6 +642,12 @@ hv_nv_connect_to_vsp(struct hv_device *device)
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/* sema_wait(&NetVscChannel->channel_init_sema); */
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/* Post the big receive buffer to NetVSP */
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if (net_dev->nvsp_version <= NVSP_PROTOCOL_VERSION_2)
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net_dev->rx_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY;
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else
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net_dev->rx_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
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net_dev->send_buf_size = NETVSC_SEND_BUFFER_SIZE;
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ret = hv_nv_init_rx_buffer_with_net_vsp(device);
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if (ret == 0)
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ret = hv_nv_init_send_buffer_with_net_vsp(device);
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@ -676,9 +682,6 @@ hv_nv_on_device_add(struct hv_device *device, void *additional_info)
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goto cleanup;
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/* Initialize the NetVSC channel extension */
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net_dev->rx_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
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net_dev->send_buf_size = NETVSC_SEND_BUFFER_SIZE;
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sema_init(&net_dev->channel_init_sema, 0, "netdev_sema");
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@ -857,7 +857,7 @@ typedef struct nvsp_msg_ {
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#define NETVSC_SEND_BUFFER_SIZE (1024*1024*15) /* 15M */
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#define NETVSC_SEND_BUFFER_ID 0xface
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#define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024*1024*15) /* 15MB */
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#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */
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#define NETVSC_RECEIVE_BUFFER_ID 0xcafe
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