forked from Minki/linux
hyperv: Add support for virtual Receive Side Scaling (vRSS)
This feature allows multiple channels to be used by each virtual NIC. It is available on Hyper-V host 2012 R2. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang
David S. Miller
parent
86fd14ad1e
commit
5b54dac856
@ -28,6 +28,96 @@
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#include <linux/hyperv.h>
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#include <linux/rndis.h>
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/* RSS related */
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#define OID_GEN_RECEIVE_SCALE_CAPABILITIES 0x00010203 /* query only */
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#define OID_GEN_RECEIVE_SCALE_PARAMETERS 0x00010204 /* query and set */
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#define NDIS_OBJECT_TYPE_RSS_CAPABILITIES 0x88
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#define NDIS_OBJECT_TYPE_RSS_PARAMETERS 0x89
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#define NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2 2
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#define NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2 2
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struct ndis_obj_header {
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u8 type;
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u8 rev;
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u16 size;
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} __packed;
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/* ndis_recv_scale_cap/cap_flag */
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#define NDIS_RSS_CAPS_MESSAGE_SIGNALED_INTERRUPTS 0x01000000
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#define NDIS_RSS_CAPS_CLASSIFICATION_AT_ISR 0x02000000
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#define NDIS_RSS_CAPS_CLASSIFICATION_AT_DPC 0x04000000
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#define NDIS_RSS_CAPS_USING_MSI_X 0x08000000
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#define NDIS_RSS_CAPS_RSS_AVAILABLE_ON_PORTS 0x10000000
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#define NDIS_RSS_CAPS_SUPPORTS_MSI_X 0x20000000
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#define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV4 0x00000100
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#define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV6 0x00000200
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#define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV6_EX 0x00000400
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struct ndis_recv_scale_cap { /* NDIS_RECEIVE_SCALE_CAPABILITIES */
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struct ndis_obj_header hdr;
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u32 cap_flag;
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u32 num_int_msg;
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u32 num_recv_que;
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u16 num_indirect_tabent;
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} __packed;
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/* ndis_recv_scale_param flags */
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#define NDIS_RSS_PARAM_FLAG_BASE_CPU_UNCHANGED 0x0001
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#define NDIS_RSS_PARAM_FLAG_HASH_INFO_UNCHANGED 0x0002
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#define NDIS_RSS_PARAM_FLAG_ITABLE_UNCHANGED 0x0004
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#define NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED 0x0008
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#define NDIS_RSS_PARAM_FLAG_DISABLE_RSS 0x0010
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/* Hash info bits */
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#define NDIS_HASH_FUNC_TOEPLITZ 0x00000001
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#define NDIS_HASH_IPV4 0x00000100
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#define NDIS_HASH_TCP_IPV4 0x00000200
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#define NDIS_HASH_IPV6 0x00000400
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#define NDIS_HASH_IPV6_EX 0x00000800
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#define NDIS_HASH_TCP_IPV6 0x00001000
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#define NDIS_HASH_TCP_IPV6_EX 0x00002000
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#define NDIS_RSS_INDIRECTION_TABLE_MAX_SIZE_REVISION_2 (128 * 4)
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#define NDIS_RSS_HASH_SECRET_KEY_MAX_SIZE_REVISION_2 40
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#define ITAB_NUM 128
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#define HASH_KEYLEN NDIS_RSS_HASH_SECRET_KEY_MAX_SIZE_REVISION_2
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extern u8 netvsc_hash_key[];
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struct ndis_recv_scale_param { /* NDIS_RECEIVE_SCALE_PARAMETERS */
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struct ndis_obj_header hdr;
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/* Qualifies the rest of the information */
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u16 flag;
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/* The base CPU number to do receive processing. not used */
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u16 base_cpu_number;
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/* This describes the hash function and type being enabled */
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u32 hashinfo;
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/* The size of indirection table array */
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u16 indirect_tabsize;
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/* The offset of the indirection table from the beginning of this
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* structure
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*/
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u32 indirect_taboffset;
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/* The size of the hash secret key */
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u16 hashkey_size;
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/* The offset of the secret key from the beginning of this structure */
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u32 kashkey_offset;
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u32 processor_masks_offset;
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u32 num_processor_masks;
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u32 processor_masks_entry_size;
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};
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/* Fwd declaration */
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struct hv_netvsc_packet;
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struct ndis_tcp_ip_checksum_info;
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@ -39,6 +129,8 @@ struct xferpage_packet {
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/* # of netvsc packets this xfer packet contains */
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u32 count;
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struct vmbus_channel *channel;
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};
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/*
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@ -54,6 +146,9 @@ struct hv_netvsc_packet {
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bool is_data_pkt;
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u16 vlan_tci;
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u16 q_idx;
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struct vmbus_channel *channel;
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/*
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* Valid only for receives when we break a xfer page packet
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* into multiple netvsc packets
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@ -120,6 +215,7 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
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int netvsc_recv_callback(struct hv_device *device_obj,
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struct hv_netvsc_packet *packet,
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struct ndis_tcp_ip_checksum_info *csum_info);
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void netvsc_channel_cb(void *context);
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int rndis_filter_open(struct hv_device *dev);
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int rndis_filter_close(struct hv_device *dev);
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int rndis_filter_device_add(struct hv_device *dev,
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@ -522,6 +618,8 @@ struct nvsp_message {
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#define NETVSC_PACKET_SIZE 2048
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#define VRSS_SEND_TAB_SIZE 16
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/* Per netvsc channel-specific */
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struct netvsc_device {
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struct hv_device *dev;
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@ -555,10 +653,20 @@ struct netvsc_device {
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struct net_device *ndev;
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struct vmbus_channel *chn_table[NR_CPUS];
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u32 send_table[VRSS_SEND_TAB_SIZE];
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u32 num_chn;
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atomic_t queue_sends[NR_CPUS];
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/* Holds rndis device info */
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void *extension;
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/* The recive buffer for this device */
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int ring_size;
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/* The primary channel callback buffer */
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unsigned char cb_buffer[NETVSC_PACKET_SIZE];
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/* The sub channel callback buffer */
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unsigned char *sub_cb_buf;
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};
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/* NdisInitialize message */
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@ -422,6 +422,9 @@ int netvsc_device_remove(struct hv_device *device)
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kfree(netvsc_packet);
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}
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if (net_device->sub_cb_buf)
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vfree(net_device->sub_cb_buf);
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kfree(net_device);
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return 0;
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}
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@ -461,7 +464,9 @@ static void netvsc_send_completion(struct netvsc_device *net_device,
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(nvsp_packet->hdr.msg_type ==
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NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) ||
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(nvsp_packet->hdr.msg_type ==
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NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) {
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NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) ||
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(nvsp_packet->hdr.msg_type ==
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NVSP_MSG5_TYPE_SUBCHANNEL)) {
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/* Copy the response back */
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memcpy(&net_device->channel_init_pkt, nvsp_packet,
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sizeof(struct nvsp_message));
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@ -469,28 +474,37 @@ static void netvsc_send_completion(struct netvsc_device *net_device,
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} else if (nvsp_packet->hdr.msg_type ==
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NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) {
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int num_outstanding_sends;
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u16 q_idx = 0;
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struct vmbus_channel *channel = device->channel;
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int queue_sends;
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/* Get the send context */
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nvsc_packet = (struct hv_netvsc_packet *)(unsigned long)
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packet->trans_id;
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/* Notify the layer above us */
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if (nvsc_packet)
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if (nvsc_packet) {
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q_idx = nvsc_packet->q_idx;
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channel = nvsc_packet->channel;
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nvsc_packet->completion.send.send_completion(
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nvsc_packet->completion.send.
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send_completion_ctx);
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}
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num_outstanding_sends =
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atomic_dec_return(&net_device->num_outstanding_sends);
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queue_sends = atomic_dec_return(&net_device->
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queue_sends[q_idx]);
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if (net_device->destroy && num_outstanding_sends == 0)
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wake_up(&net_device->wait_drain);
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if (netif_queue_stopped(ndev) && !net_device->start_remove &&
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(hv_ringbuf_avail_percent(&device->channel->outbound)
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> RING_AVAIL_PERCENT_HIWATER ||
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num_outstanding_sends < 1))
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netif_wake_queue(ndev);
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if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) &&
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!net_device->start_remove &&
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(hv_ringbuf_avail_percent(&channel->outbound) >
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RING_AVAIL_PERCENT_HIWATER || queue_sends < 1))
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netif_tx_wake_queue(netdev_get_tx_queue(
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ndev, q_idx));
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} else {
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netdev_err(ndev, "Unknown send completion packet type- "
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"%d received!!\n", nvsp_packet->hdr.msg_type);
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@ -505,6 +519,7 @@ int netvsc_send(struct hv_device *device,
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int ret = 0;
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struct nvsp_message sendMessage;
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struct net_device *ndev;
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struct vmbus_channel *out_channel = NULL;
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u64 req_id;
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net_device = get_outbound_net_device(device);
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@ -531,15 +546,20 @@ int netvsc_send(struct hv_device *device,
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else
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req_id = 0;
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out_channel = net_device->chn_table[packet->q_idx];
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if (out_channel == NULL)
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out_channel = device->channel;
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packet->channel = out_channel;
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if (packet->page_buf_cnt) {
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ret = vmbus_sendpacket_pagebuffer(device->channel,
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ret = vmbus_sendpacket_pagebuffer(out_channel,
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packet->page_buf,
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packet->page_buf_cnt,
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&sendMessage,
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sizeof(struct nvsp_message),
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req_id);
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} else {
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ret = vmbus_sendpacket(device->channel, &sendMessage,
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ret = vmbus_sendpacket(out_channel, &sendMessage,
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sizeof(struct nvsp_message),
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req_id,
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VM_PKT_DATA_INBAND,
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@ -548,17 +568,24 @@ int netvsc_send(struct hv_device *device,
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if (ret == 0) {
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atomic_inc(&net_device->num_outstanding_sends);
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if (hv_ringbuf_avail_percent(&device->channel->outbound) <
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atomic_inc(&net_device->queue_sends[packet->q_idx]);
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if (hv_ringbuf_avail_percent(&out_channel->outbound) <
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RING_AVAIL_PERCENT_LOWATER) {
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netif_stop_queue(ndev);
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netif_tx_stop_queue(netdev_get_tx_queue(
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ndev, packet->q_idx));
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if (atomic_read(&net_device->
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num_outstanding_sends) < 1)
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netif_wake_queue(ndev);
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queue_sends[packet->q_idx]) < 1)
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netif_tx_wake_queue(netdev_get_tx_queue(
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ndev, packet->q_idx));
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}
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} else if (ret == -EAGAIN) {
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netif_stop_queue(ndev);
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if (atomic_read(&net_device->num_outstanding_sends) < 1) {
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netif_wake_queue(ndev);
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netif_tx_stop_queue(netdev_get_tx_queue(
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ndev, packet->q_idx));
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if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) {
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netif_tx_wake_queue(netdev_get_tx_queue(
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ndev, packet->q_idx));
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ret = -ENOSPC;
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}
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} else {
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@ -570,6 +597,7 @@ int netvsc_send(struct hv_device *device,
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}
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static void netvsc_send_recv_completion(struct hv_device *device,
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struct vmbus_channel *channel,
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struct netvsc_device *net_device,
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u64 transaction_id, u32 status)
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{
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@ -587,7 +615,7 @@ static void netvsc_send_recv_completion(struct hv_device *device,
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retry_send_cmplt:
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/* Send the completion */
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ret = vmbus_sendpacket(device->channel, &recvcompMessage,
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ret = vmbus_sendpacket(channel, &recvcompMessage,
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sizeof(struct nvsp_message), transaction_id,
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VM_PKT_COMP, 0);
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if (ret == 0) {
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@ -618,6 +646,7 @@ static void netvsc_receive_completion(void *context)
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{
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struct hv_netvsc_packet *packet = context;
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struct hv_device *device = packet->device;
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struct vmbus_channel *channel;
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struct netvsc_device *net_device;
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u64 transaction_id = 0;
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bool fsend_receive_comp = false;
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@ -649,6 +678,7 @@ static void netvsc_receive_completion(void *context)
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*/
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if (packet->xfer_page_pkt->count == 0) {
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fsend_receive_comp = true;
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channel = packet->xfer_page_pkt->channel;
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transaction_id = packet->completion.recv.recv_completion_tid;
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status = packet->xfer_page_pkt->status;
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list_add_tail(&packet->xfer_page_pkt->list_ent,
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@ -662,12 +692,13 @@ static void netvsc_receive_completion(void *context)
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/* Send a receive completion for the xfer page packet */
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if (fsend_receive_comp)
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netvsc_send_recv_completion(device, net_device, transaction_id,
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status);
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netvsc_send_recv_completion(device, channel, net_device,
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transaction_id, status);
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}
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static void netvsc_receive(struct netvsc_device *net_device,
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struct vmbus_channel *channel,
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struct hv_device *device,
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struct vmpacket_descriptor *packet)
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{
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@ -748,7 +779,7 @@ static void netvsc_receive(struct netvsc_device *net_device,
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spin_unlock_irqrestore(&net_device->recv_pkt_list_lock,
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flags);
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netvsc_send_recv_completion(device, net_device,
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netvsc_send_recv_completion(device, channel, net_device,
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vmxferpage_packet->d.trans_id,
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NVSP_STAT_FAIL);
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@ -759,6 +790,7 @@ static void netvsc_receive(struct netvsc_device *net_device,
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xferpage_packet = (struct xferpage_packet *)listHead.next;
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list_del(&xferpage_packet->list_ent);
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xferpage_packet->status = NVSP_STAT_SUCCESS;
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xferpage_packet->channel = channel;
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/* This is how much we can satisfy */
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xferpage_packet->count = count - 1;
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@ -800,10 +832,45 @@ static void netvsc_receive(struct netvsc_device *net_device,
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}
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static void netvsc_channel_cb(void *context)
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static void netvsc_send_table(struct hv_device *hdev,
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struct vmpacket_descriptor *vmpkt)
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{
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struct netvsc_device *nvscdev;
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struct net_device *ndev;
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struct nvsp_message *nvmsg;
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int i;
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u32 count, *tab;
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nvscdev = get_outbound_net_device(hdev);
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if (!nvscdev)
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return;
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ndev = nvscdev->ndev;
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nvmsg = (struct nvsp_message *)((unsigned long)vmpkt +
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(vmpkt->offset8 << 3));
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if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE)
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return;
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count = nvmsg->msg.v5_msg.send_table.count;
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if (count != VRSS_SEND_TAB_SIZE) {
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netdev_err(ndev, "Received wrong send-table size:%u\n", count);
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return;
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}
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tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table +
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nvmsg->msg.v5_msg.send_table.offset);
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for (i = 0; i < count; i++)
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nvscdev->send_table[i] = tab[i];
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}
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void netvsc_channel_cb(void *context)
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{
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int ret;
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struct hv_device *device = context;
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struct vmbus_channel *channel = (struct vmbus_channel *)context;
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struct hv_device *device;
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struct netvsc_device *net_device;
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u32 bytes_recvd;
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u64 request_id;
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@ -812,14 +879,19 @@ static void netvsc_channel_cb(void *context)
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int bufferlen = NETVSC_PACKET_SIZE;
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struct net_device *ndev;
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if (channel->primary_channel != NULL)
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device = channel->primary_channel->device_obj;
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else
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device = channel->device_obj;
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net_device = get_inbound_net_device(device);
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if (!net_device)
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return;
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ndev = net_device->ndev;
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buffer = net_device->cb_buffer;
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buffer = get_per_channel_state(channel);
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do {
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ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen,
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ret = vmbus_recvpacket_raw(channel, buffer, bufferlen,
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&bytes_recvd, &request_id);
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if (ret == 0) {
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if (bytes_recvd > 0) {
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@ -831,8 +903,12 @@ static void netvsc_channel_cb(void *context)
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break;
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case VM_PKT_DATA_USING_XFER_PAGES:
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netvsc_receive(net_device,
|
||||
device, desc);
|
||||
netvsc_receive(net_device, channel,
|
||||
device, desc);
|
||||
break;
|
||||
|
||||
case VM_PKT_DATA_INBAND:
|
||||
netvsc_send_table(device, desc);
|
||||
break;
|
||||
|
||||
default:
|
||||
@ -893,6 +969,8 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
net_device->ring_size = ring_size;
|
||||
|
||||
/*
|
||||
* Coming into this function, struct net_device * is
|
||||
* registered as the driver private data.
|
||||
@ -917,10 +995,12 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
|
||||
}
|
||||
init_completion(&net_device->channel_init_wait);
|
||||
|
||||
set_per_channel_state(device->channel, net_device->cb_buffer);
|
||||
|
||||
/* Open the channel */
|
||||
ret = vmbus_open(device->channel, ring_size * PAGE_SIZE,
|
||||
ring_size * PAGE_SIZE, NULL, 0,
|
||||
netvsc_channel_cb, device);
|
||||
netvsc_channel_cb, device->channel);
|
||||
|
||||
if (ret != 0) {
|
||||
netdev_err(ndev, "unable to open channel: %d\n", ret);
|
||||
@ -930,6 +1010,8 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
|
||||
/* Channel is opened */
|
||||
pr_info("hv_netvsc channel opened successfully\n");
|
||||
|
||||
net_device->chn_table[0] = device->channel;
|
||||
|
||||
/* Connect with the NetVsp */
|
||||
ret = netvsc_connect_vsp(device);
|
||||
if (ret != 0) {
|
||||
|
||||
@ -101,7 +101,7 @@ static int netvsc_open(struct net_device *net)
|
||||
return ret;
|
||||
}
|
||||
|
||||
netif_start_queue(net);
|
||||
netif_tx_start_all_queues(net);
|
||||
|
||||
nvdev = hv_get_drvdata(device_obj);
|
||||
rdev = nvdev->extension;
|
||||
@ -149,6 +149,88 @@ static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size,
|
||||
return ppi;
|
||||
}
|
||||
|
||||
union sub_key {
|
||||
u64 k;
|
||||
struct {
|
||||
u8 pad[3];
|
||||
u8 kb;
|
||||
u32 ka;
|
||||
};
|
||||
};
|
||||
|
||||
/* Toeplitz hash function
|
||||
* data: network byte order
|
||||
* return: host byte order
|
||||
*/
|
||||
static u32 comp_hash(u8 *key, int klen, u8 *data, int dlen)
|
||||
{
|
||||
union sub_key subk;
|
||||
int k_next = 4;
|
||||
u8 dt;
|
||||
int i, j;
|
||||
u32 ret = 0;
|
||||
|
||||
subk.k = 0;
|
||||
subk.ka = ntohl(*(u32 *)key);
|
||||
|
||||
for (i = 0; i < dlen; i++) {
|
||||
subk.kb = key[k_next];
|
||||
k_next = (k_next + 1) % klen;
|
||||
dt = data[i];
|
||||
for (j = 0; j < 8; j++) {
|
||||
if (dt & 0x80)
|
||||
ret ^= subk.ka;
|
||||
dt <<= 1;
|
||||
subk.k <<= 1;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static bool netvsc_set_hash(u32 *hash, struct sk_buff *skb)
|
||||
{
|
||||
struct iphdr *iphdr;
|
||||
int data_len;
|
||||
bool ret = false;
|
||||
|
||||
if (eth_hdr(skb)->h_proto != htons(ETH_P_IP))
|
||||
return false;
|
||||
|
||||
iphdr = ip_hdr(skb);
|
||||
|
||||
if (iphdr->version == 4) {
|
||||
if (iphdr->protocol == IPPROTO_TCP)
|
||||
data_len = 12;
|
||||
else
|
||||
data_len = 8;
|
||||
*hash = comp_hash(netvsc_hash_key, HASH_KEYLEN,
|
||||
(u8 *)&iphdr->saddr, data_len);
|
||||
ret = true;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
|
||||
void *accel_priv, select_queue_fallback_t fallback)
|
||||
{
|
||||
struct net_device_context *net_device_ctx = netdev_priv(ndev);
|
||||
struct hv_device *hdev = net_device_ctx->device_ctx;
|
||||
struct netvsc_device *nvsc_dev = hv_get_drvdata(hdev);
|
||||
u32 hash;
|
||||
u16 q_idx = 0;
|
||||
|
||||
if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1)
|
||||
return 0;
|
||||
|
||||
if (netvsc_set_hash(&hash, skb))
|
||||
q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] %
|
||||
ndev->real_num_tx_queues;
|
||||
|
||||
return q_idx;
|
||||
}
|
||||
|
||||
static void netvsc_xmit_completion(void *context)
|
||||
{
|
||||
struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context;
|
||||
@ -333,6 +415,8 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
|
||||
|
||||
packet->vlan_tci = skb->vlan_tci;
|
||||
|
||||
packet->q_idx = skb_get_queue_mapping(skb);
|
||||
|
||||
packet->is_data_pkt = true;
|
||||
packet->total_data_buflen = skb->len;
|
||||
|
||||
@ -554,6 +638,10 @@ int netvsc_recv_callback(struct hv_device *device_obj,
|
||||
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
||||
packet->vlan_tci);
|
||||
|
||||
skb_record_rx_queue(skb, packet->xfer_page_pkt->channel->
|
||||
offermsg.offer.sub_channel_index %
|
||||
net->real_num_rx_queues);
|
||||
|
||||
net->stats.rx_packets++;
|
||||
net->stats.rx_bytes += packet->total_data_buflen;
|
||||
|
||||
@ -602,7 +690,7 @@ static int netvsc_change_mtu(struct net_device *ndev, int mtu)
|
||||
hv_set_drvdata(hdev, ndev);
|
||||
device_info.ring_size = ring_size;
|
||||
rndis_filter_device_add(hdev, &device_info);
|
||||
netif_wake_queue(ndev);
|
||||
netif_tx_wake_all_queues(ndev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -648,6 +736,7 @@ static const struct net_device_ops device_ops = {
|
||||
.ndo_change_mtu = netvsc_change_mtu,
|
||||
.ndo_validate_addr = eth_validate_addr,
|
||||
.ndo_set_mac_address = netvsc_set_mac_addr,
|
||||
.ndo_select_queue = netvsc_select_queue,
|
||||
};
|
||||
|
||||
/*
|
||||
@ -694,9 +783,11 @@ static int netvsc_probe(struct hv_device *dev,
|
||||
struct net_device *net = NULL;
|
||||
struct net_device_context *net_device_ctx;
|
||||
struct netvsc_device_info device_info;
|
||||
struct netvsc_device *nvdev;
|
||||
int ret;
|
||||
|
||||
net = alloc_etherdev(sizeof(struct net_device_context));
|
||||
net = alloc_etherdev_mq(sizeof(struct net_device_context),
|
||||
num_online_cpus());
|
||||
if (!net)
|
||||
return -ENOMEM;
|
||||
|
||||
@ -729,6 +820,12 @@ static int netvsc_probe(struct hv_device *dev,
|
||||
}
|
||||
memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
|
||||
|
||||
nvdev = hv_get_drvdata(dev);
|
||||
netif_set_real_num_tx_queues(net, nvdev->num_chn);
|
||||
netif_set_real_num_rx_queues(net, nvdev->num_chn);
|
||||
dev_info(&dev->device, "real num tx,rx queues:%u, %u\n",
|
||||
net->real_num_tx_queues, net->real_num_rx_queues);
|
||||
|
||||
ret = register_netdev(net);
|
||||
if (ret != 0) {
|
||||
pr_err("Unable to register netdev.\n");
|
||||
|
||||
@ -31,7 +31,7 @@
|
||||
#include "hyperv_net.h"
|
||||
|
||||
|
||||
#define RNDIS_EXT_LEN 100
|
||||
#define RNDIS_EXT_LEN PAGE_SIZE
|
||||
struct rndis_request {
|
||||
struct list_head list_ent;
|
||||
struct completion wait_event;
|
||||
@ -94,6 +94,8 @@ static struct rndis_request *get_rndis_request(struct rndis_device *dev,
|
||||
rndis_msg->ndis_msg_type = msg_type;
|
||||
rndis_msg->msg_len = msg_len;
|
||||
|
||||
request->pkt.q_idx = 0;
|
||||
|
||||
/*
|
||||
* Set the request id. This field is always after the rndis header for
|
||||
* request/response packet types so we just used the SetRequest as a
|
||||
@ -509,6 +511,19 @@ static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
|
||||
query->info_buflen = 0;
|
||||
query->dev_vc_handle = 0;
|
||||
|
||||
if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
|
||||
struct ndis_recv_scale_cap *cap;
|
||||
|
||||
request->request_msg.msg_len +=
|
||||
sizeof(struct ndis_recv_scale_cap);
|
||||
query->info_buflen = sizeof(struct ndis_recv_scale_cap);
|
||||
cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
|
||||
query->info_buf_offset);
|
||||
cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
|
||||
cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
|
||||
cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
|
||||
}
|
||||
|
||||
ret = rndis_filter_send_request(dev, request);
|
||||
if (ret != 0)
|
||||
goto cleanup;
|
||||
@ -695,6 +710,89 @@ cleanup:
|
||||
return ret;
|
||||
}
|
||||
|
||||
u8 netvsc_hash_key[HASH_KEYLEN] = {
|
||||
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
|
||||
0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
|
||||
0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
|
||||
0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
|
||||
0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
|
||||
};
|
||||
|
||||
int rndis_filter_set_rss_param(struct rndis_device *rdev, int num_queue)
|
||||
{
|
||||
struct net_device *ndev = rdev->net_dev->ndev;
|
||||
struct rndis_request *request;
|
||||
struct rndis_set_request *set;
|
||||
struct rndis_set_complete *set_complete;
|
||||
u32 extlen = sizeof(struct ndis_recv_scale_param) +
|
||||
4*ITAB_NUM + HASH_KEYLEN;
|
||||
struct ndis_recv_scale_param *rssp;
|
||||
u32 *itab;
|
||||
u8 *keyp;
|
||||
int i, t, ret;
|
||||
|
||||
request = get_rndis_request(
|
||||
rdev, RNDIS_MSG_SET,
|
||||
RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
|
||||
if (!request)
|
||||
return -ENOMEM;
|
||||
|
||||
set = &request->request_msg.msg.set_req;
|
||||
set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
|
||||
set->info_buflen = extlen;
|
||||
set->info_buf_offset = sizeof(struct rndis_set_request);
|
||||
set->dev_vc_handle = 0;
|
||||
|
||||
rssp = (struct ndis_recv_scale_param *)(set + 1);
|
||||
rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
|
||||
rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
|
||||
rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
|
||||
rssp->flag = 0;
|
||||
rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
|
||||
NDIS_HASH_TCP_IPV4;
|
||||
rssp->indirect_tabsize = 4*ITAB_NUM;
|
||||
rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
|
||||
rssp->hashkey_size = HASH_KEYLEN;
|
||||
rssp->kashkey_offset = rssp->indirect_taboffset +
|
||||
rssp->indirect_tabsize;
|
||||
|
||||
/* Set indirection table entries */
|
||||
itab = (u32 *)(rssp + 1);
|
||||
for (i = 0; i < ITAB_NUM; i++)
|
||||
itab[i] = i % num_queue;
|
||||
|
||||
/* Set hask key values */
|
||||
keyp = (u8 *)((unsigned long)rssp + rssp->kashkey_offset);
|
||||
for (i = 0; i < HASH_KEYLEN; i++)
|
||||
keyp[i] = netvsc_hash_key[i];
|
||||
|
||||
|
||||
ret = rndis_filter_send_request(rdev, request);
|
||||
if (ret != 0)
|
||||
goto cleanup;
|
||||
|
||||
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
||||
if (t == 0) {
|
||||
netdev_err(ndev, "timeout before we got a set response...\n");
|
||||
/* can't put_rndis_request, since we may still receive a
|
||||
* send-completion.
|
||||
*/
|
||||
return -ETIMEDOUT;
|
||||
} else {
|
||||
set_complete = &request->response_msg.msg.set_complete;
|
||||
if (set_complete->status != RNDIS_STATUS_SUCCESS) {
|
||||
netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
|
||||
set_complete->status);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
cleanup:
|
||||
put_rndis_request(rdev, request);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static int rndis_filter_query_device_link_status(struct rndis_device *dev)
|
||||
{
|
||||
u32 size = sizeof(u32);
|
||||
@ -886,6 +984,28 @@ static int rndis_filter_close_device(struct rndis_device *dev)
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void netvsc_sc_open(struct vmbus_channel *new_sc)
|
||||
{
|
||||
struct netvsc_device *nvscdev;
|
||||
u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
|
||||
int ret;
|
||||
|
||||
nvscdev = hv_get_drvdata(new_sc->primary_channel->device_obj);
|
||||
|
||||
if (chn_index >= nvscdev->num_chn)
|
||||
return;
|
||||
|
||||
set_per_channel_state(new_sc, nvscdev->sub_cb_buf + (chn_index - 1) *
|
||||
NETVSC_PACKET_SIZE);
|
||||
|
||||
ret = vmbus_open(new_sc, nvscdev->ring_size * PAGE_SIZE,
|
||||
nvscdev->ring_size * PAGE_SIZE, NULL, 0,
|
||||
netvsc_channel_cb, new_sc);
|
||||
|
||||
if (ret == 0)
|
||||
nvscdev->chn_table[chn_index] = new_sc;
|
||||
}
|
||||
|
||||
int rndis_filter_device_add(struct hv_device *dev,
|
||||
void *additional_info)
|
||||
{
|
||||
@ -894,6 +1014,10 @@ int rndis_filter_device_add(struct hv_device *dev,
|
||||
struct rndis_device *rndis_device;
|
||||
struct netvsc_device_info *device_info = additional_info;
|
||||
struct ndis_offload_params offloads;
|
||||
struct nvsp_message *init_packet;
|
||||
int t;
|
||||
struct ndis_recv_scale_cap rsscap;
|
||||
u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
|
||||
|
||||
rndis_device = get_rndis_device();
|
||||
if (!rndis_device)
|
||||
@ -913,6 +1037,7 @@ int rndis_filter_device_add(struct hv_device *dev,
|
||||
|
||||
/* Initialize the rndis device */
|
||||
net_device = hv_get_drvdata(dev);
|
||||
net_device->num_chn = 1;
|
||||
|
||||
net_device->extension = rndis_device;
|
||||
rndis_device->net_dev = net_device;
|
||||
@ -952,7 +1077,6 @@ int rndis_filter_device_add(struct hv_device *dev,
|
||||
if (ret)
|
||||
goto err_dev_remv;
|
||||
|
||||
|
||||
rndis_filter_query_device_link_status(rndis_device);
|
||||
|
||||
device_info->link_state = rndis_device->link_state;
|
||||
@ -961,7 +1085,66 @@ int rndis_filter_device_add(struct hv_device *dev,
|
||||
rndis_device->hw_mac_adr,
|
||||
device_info->link_state ? "down" : "up");
|
||||
|
||||
return ret;
|
||||
if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
|
||||
return 0;
|
||||
|
||||
/* vRSS setup */
|
||||
memset(&rsscap, 0, rsscap_size);
|
||||
ret = rndis_filter_query_device(rndis_device,
|
||||
OID_GEN_RECEIVE_SCALE_CAPABILITIES,
|
||||
&rsscap, &rsscap_size);
|
||||
if (ret || rsscap.num_recv_que < 2)
|
||||
goto out;
|
||||
|
||||
net_device->num_chn = (num_online_cpus() < rsscap.num_recv_que) ?
|
||||
num_online_cpus() : rsscap.num_recv_que;
|
||||
if (net_device->num_chn == 1)
|
||||
goto out;
|
||||
|
||||
net_device->sub_cb_buf = vzalloc((net_device->num_chn - 1) *
|
||||
NETVSC_PACKET_SIZE);
|
||||
if (!net_device->sub_cb_buf) {
|
||||
net_device->num_chn = 1;
|
||||
dev_info(&dev->device, "No memory for subchannels.\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
|
||||
|
||||
init_packet = &net_device->channel_init_pkt;
|
||||
memset(init_packet, 0, sizeof(struct nvsp_message));
|
||||
init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
|
||||
init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
|
||||
init_packet->msg.v5_msg.subchn_req.num_subchannels =
|
||||
net_device->num_chn - 1;
|
||||
ret = vmbus_sendpacket(dev->channel, init_packet,
|
||||
sizeof(struct nvsp_message),
|
||||
(unsigned long)init_packet,
|
||||
VM_PKT_DATA_INBAND,
|
||||
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
||||
if (ret)
|
||||
goto out;
|
||||
t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
|
||||
if (t == 0) {
|
||||
ret = -ETIMEDOUT;
|
||||
goto out;
|
||||
}
|
||||
if (init_packet->msg.v5_msg.subchn_comp.status !=
|
||||
NVSP_STAT_SUCCESS) {
|
||||
ret = -ENODEV;
|
||||
goto out;
|
||||
}
|
||||
net_device->num_chn = 1 +
|
||||
init_packet->msg.v5_msg.subchn_comp.num_subchannels;
|
||||
|
||||
vmbus_are_subchannels_present(dev->channel);
|
||||
|
||||
ret = rndis_filter_set_rss_param(rndis_device, net_device->num_chn);
|
||||
|
||||
out:
|
||||
if (ret)
|
||||
net_device->num_chn = 1;
|
||||
return 0; /* return 0 because primary channel can be used alone */
|
||||
|
||||
err_dev_remv:
|
||||
rndis_filter_device_remove(dev);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user