From 59995370dbca7636c105ddadc0447fab86ad3887 Mon Sep 17 00:00:00 2001 From: Andrew Schwartzmeyer Date: Thu, 26 Feb 2015 16:27:14 -0800 Subject: hyperv: Implement netvsc_get_channels() ethool op This adds support for reporting the actual and maximum combined channels count of the hv_netvsc driver via 'ethtool --show-channels'. This required adding 'max_chn' to 'struct netvsc_device', and assigning it 'rsscap.num_recv_que' in 'rndis_filter_device_add'. Now we can access the combined maximum channel count via 'struct netvsc_device' in the ethtool callback. Signed-off-by: Andrew Schwartzmeyer Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 384ca4f4de4a..4815843a6019 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -634,6 +634,7 @@ struct netvsc_device { struct vmbus_channel *chn_table[NR_CPUS]; u32 send_table[VRSS_SEND_TAB_SIZE]; + u32 max_chn; u32 num_chn; atomic_t queue_sends[NR_CPUS]; -- cgit v1.2.3 From 7c3877f275ee6b479fa828947811c76d431501ca Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Thu, 26 Mar 2015 09:03:37 -0700 Subject: hv_netvsc: Implement batching in send buffer With this patch, we can send out multiple RNDIS data packets in one send buffer slot and one VMBus message. It reduces the overhead associated with VMBus messages. Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 4815843a6019..384f057d6570 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -131,6 +131,7 @@ struct hv_netvsc_packet { struct hv_device *device; bool is_data_pkt; + bool xmit_more; /* from skb */ u16 vlan_tci; u16 q_idx; @@ -596,7 +597,16 @@ struct nvsp_message { #define VRSS_SEND_TAB_SIZE 16 -/* Per netvsc channel-specific */ +#define RNDIS_MAX_PKT_DEFAULT 8 +#define RNDIS_PKT_ALIGN_DEFAULT 8 + +struct multi_send_data { + spinlock_t lock; /* protect struct multi_send_data */ + struct hv_netvsc_packet *pkt; /* netvsc pkt pending */ + u32 count; /* counter of batched packets */ +}; + +/* Per netvsc device */ struct netvsc_device { struct hv_device *dev; @@ -647,6 +657,10 @@ struct netvsc_device { unsigned char *cb_buffer; /* The sub channel callback buffer */ unsigned char *sub_cb_buf; + + struct multi_send_data msd[NR_CPUS]; + u32 max_pkt; /* max number of pkt in one send, e.g. 8 */ + u32 pkt_align; /* alignment bytes, e.g. 8 */ }; /* NdisInitialize message */ -- cgit v1.2.3 From b08cc79155fc26d0d112b1470d1ece5034651a4b Mon Sep 17 00:00:00 2001 From: KY Srinivasan Date: Sun, 29 Mar 2015 21:08:42 -0700 Subject: hv_netvsc: Eliminate memory allocation in the packet send path The network protocol used to communicate with the host is the remote ndis (rndis) protocol. We need to decorate each outgoing packet with a rndis header and additional rndis state (rndis per-packet state). To manage this state, we currently allocate memory in the transmit path. Eliminate this allocation by requesting additional head room in the skb. Signed-off-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 384f057d6570..309adee6e791 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -128,6 +128,7 @@ struct ndis_tcp_ip_checksum_info; struct hv_netvsc_packet { /* Bookkeeping stuff */ u32 status; + bool part_of_skb; struct hv_device *device; bool is_data_pkt; @@ -150,7 +151,7 @@ struct hv_netvsc_packet { /* Points to the send/receive buffer where the ethernet frame is */ void *data; u32 page_buf_cnt; - struct hv_page_buffer page_buf[0]; + struct hv_page_buffer *page_buf; }; struct netvsc_device_info { -- cgit v1.2.3 From 0d158852a8089099a6959ae235b20f230871982f Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Mon, 6 Apr 2015 15:22:52 -0700 Subject: hv_netvsc: Clean up two unused variables Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 309adee6e791..95a25e4b2601 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -130,7 +130,6 @@ struct hv_netvsc_packet { u32 status; bool part_of_skb; - struct hv_device *device; bool is_data_pkt; bool xmit_more; /* from skb */ u16 vlan_tci; -- cgit v1.2.3 From 721514222db13498613706709409c21c105e0f4a Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Mon, 6 Apr 2015 15:22:53 -0700 Subject: hv_netvsc: Define a macro RNDIS_AND_PPI_SIZE The sum of RNDIS msg and PPI struct sizes is used in multiple places, so we define a macro for them. Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 95a25e4b2601..80bc52eb000c 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -958,6 +958,10 @@ struct ndis_tcp_lso_info { #define NDIS_HASH_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \ sizeof(u32)) +/* Total size of all PPI data */ +#define NDIS_ALL_PPI_SIZE (NDIS_VLAN_PPI_SIZE + NDIS_CSUM_PPI_SIZE + \ + NDIS_LSO_PPI_SIZE + NDIS_HASH_PPI_SIZE) + /* Format of Information buffer passed in a SetRequest for the OID */ /* OID_GEN_RNDIS_CONFIG_PARAMETER. */ struct rndis_config_parameter_info { @@ -1170,6 +1174,8 @@ struct rndis_message { #define RNDIS_HEADER_SIZE (sizeof(struct rndis_message) - \ sizeof(union rndis_message_container)) +#define RNDIS_AND_PPI_SIZE (sizeof(struct rndis_message) + NDIS_ALL_PPI_SIZE) + #define NDIS_PACKET_TYPE_DIRECTED 0x00000001 #define NDIS_PACKET_TYPE_MULTICAST 0x00000002 #define NDIS_PACKET_TYPE_ALL_MULTICAST 0x00000004 -- cgit v1.2.3 From ee90b81203a91d4e5385622811ee7872b5bcfe76 Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Mon, 6 Apr 2015 15:22:54 -0700 Subject: hv_netvsc: Fix the packet free when it is in skb headroom In the two places changed, we now use netvsc_xmit_completion() which properly frees hv_netvsc_packet in or not in skb headroom. Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 80bc52eb000c..f0b8b3e0ed7c 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -188,6 +188,7 @@ int netvsc_send(struct hv_device *device, struct hv_netvsc_packet *packet); void netvsc_linkstatus_callback(struct hv_device *device_obj, struct rndis_message *resp); +void netvsc_xmit_completion(void *context); int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_packet *packet, struct ndis_tcp_ip_checksum_info *csum_info); -- cgit v1.2.3 From aa0a34be68290aa9aa071c0691fb8b6edda38358 Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Mon, 13 Apr 2015 16:34:35 -0700 Subject: hv_netvsc: Implement partial copy into send buffer If remaining space in a send buffer slot is too small for the whole message, we only copy the RNDIS header and PPI data into send buffer, so we can batch one more packet each time. It reduces the vmbus per-message overhead. Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/net/hyperv/hyperv_net.h') diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index f0b8b3e0ed7c..a10b31664709 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -132,6 +132,8 @@ struct hv_netvsc_packet { bool is_data_pkt; bool xmit_more; /* from skb */ + bool cp_partial; /* partial copy into send buffer */ + u16 vlan_tci; u16 q_idx; @@ -146,6 +148,9 @@ struct hv_netvsc_packet { /* This points to the memory after page_buf */ struct rndis_message *rndis_msg; + u32 rmsg_size; /* RNDIS header and PPI size */ + u32 rmsg_pgcnt; /* page count of RNDIS header and PPI */ + u32 total_data_buflen; /* Points to the send/receive buffer where the ethernet frame is */ void *data; -- cgit v1.2.3