forked from luck/tmp_suning_uos_patched
1553 lines
39 KiB
C
1553 lines
39 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/atomic.h>
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#include <linux/module.h>
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#include <linux/highmem.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <net/arp.h>
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#include <net/route.h>
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#include <net/sock.h>
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#include <net/pkt_sched.h>
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#include "hyperv_net.h"
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#define RING_SIZE_MIN 64
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#define LINKCHANGE_INT (2 * HZ)
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#define NETVSC_HW_FEATURES (NETIF_F_RXCSUM | \
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NETIF_F_SG | \
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NETIF_F_TSO | \
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NETIF_F_TSO6 | \
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NETIF_F_HW_CSUM)
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/* Restrict GSO size to account for NVGRE */
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#define NETVSC_GSO_MAX_SIZE 62768
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static int ring_size = 128;
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module_param(ring_size, int, S_IRUGO);
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MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
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static int max_num_vrss_chns = 8;
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static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
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NETIF_MSG_LINK | NETIF_MSG_IFUP |
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NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR |
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NETIF_MSG_TX_ERR;
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static int debug = -1;
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module_param(debug, int, S_IRUGO);
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MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
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static void do_set_multicast(struct work_struct *w)
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{
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struct net_device_context *ndevctx =
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container_of(w, struct net_device_context, work);
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struct hv_device *device_obj = ndevctx->device_ctx;
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struct net_device *ndev = hv_get_drvdata(device_obj);
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struct netvsc_device *nvdev = ndevctx->nvdev;
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struct rndis_device *rdev;
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if (!nvdev)
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return;
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rdev = nvdev->extension;
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if (rdev == NULL)
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return;
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if (ndev->flags & IFF_PROMISC)
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rndis_filter_set_packet_filter(rdev,
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NDIS_PACKET_TYPE_PROMISCUOUS);
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else
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rndis_filter_set_packet_filter(rdev,
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NDIS_PACKET_TYPE_BROADCAST |
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NDIS_PACKET_TYPE_ALL_MULTICAST |
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NDIS_PACKET_TYPE_DIRECTED);
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}
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static void netvsc_set_multicast_list(struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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schedule_work(&net_device_ctx->work);
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}
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static int netvsc_open(struct net_device *net)
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{
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struct netvsc_device *nvdev = net_device_to_netvsc_device(net);
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struct rndis_device *rdev;
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int ret = 0;
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netif_carrier_off(net);
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/* Open up the device */
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ret = rndis_filter_open(nvdev);
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if (ret != 0) {
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netdev_err(net, "unable to open device (ret %d).\n", ret);
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return ret;
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}
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netif_tx_wake_all_queues(net);
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rdev = nvdev->extension;
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if (!rdev->link_state)
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netif_carrier_on(net);
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return ret;
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}
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static int netvsc_close(struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct netvsc_device *nvdev = net_device_ctx->nvdev;
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int ret;
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u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20;
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struct vmbus_channel *chn;
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netif_tx_disable(net);
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/* Make sure netvsc_set_multicast_list doesn't re-enable filter! */
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cancel_work_sync(&net_device_ctx->work);
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ret = rndis_filter_close(nvdev);
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if (ret != 0) {
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netdev_err(net, "unable to close device (ret %d).\n", ret);
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return ret;
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}
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/* Ensure pending bytes in ring are read */
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while (true) {
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aread = 0;
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for (i = 0; i < nvdev->num_chn; i++) {
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chn = nvdev->chn_table[i];
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if (!chn)
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continue;
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hv_get_ringbuffer_availbytes(&chn->inbound, &aread,
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&awrite);
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if (aread)
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break;
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hv_get_ringbuffer_availbytes(&chn->outbound, &aread,
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&awrite);
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if (aread)
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break;
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}
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retry++;
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if (retry > retry_max || aread == 0)
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break;
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msleep(msec);
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if (msec < 1000)
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msec *= 2;
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}
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if (aread) {
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netdev_err(net, "Ring buffer not empty after closing rndis\n");
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ret = -ETIMEDOUT;
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}
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return ret;
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}
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static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size,
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int pkt_type)
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{
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struct rndis_packet *rndis_pkt;
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struct rndis_per_packet_info *ppi;
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rndis_pkt = &msg->msg.pkt;
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rndis_pkt->data_offset += ppi_size;
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ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt +
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rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len);
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ppi->size = ppi_size;
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ppi->type = pkt_type;
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ppi->ppi_offset = sizeof(struct rndis_per_packet_info);
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rndis_pkt->per_pkt_info_len += ppi_size;
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return ppi;
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}
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static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
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void *accel_priv, select_queue_fallback_t fallback)
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{
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struct net_device_context *net_device_ctx = netdev_priv(ndev);
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struct netvsc_device *nvsc_dev = net_device_ctx->nvdev;
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u32 hash;
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u16 q_idx = 0;
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if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1)
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return 0;
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hash = skb_get_hash(skb);
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q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] %
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ndev->real_num_tx_queues;
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if (!nvsc_dev->chn_table[q_idx])
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q_idx = 0;
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return q_idx;
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}
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static u32 fill_pg_buf(struct page *page, u32 offset, u32 len,
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struct hv_page_buffer *pb)
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{
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int j = 0;
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/* Deal with compund pages by ignoring unused part
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* of the page.
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*/
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page += (offset >> PAGE_SHIFT);
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offset &= ~PAGE_MASK;
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while (len > 0) {
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unsigned long bytes;
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bytes = PAGE_SIZE - offset;
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if (bytes > len)
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bytes = len;
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pb[j].pfn = page_to_pfn(page);
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pb[j].offset = offset;
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pb[j].len = bytes;
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offset += bytes;
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len -= bytes;
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if (offset == PAGE_SIZE && len) {
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page++;
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offset = 0;
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j++;
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}
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}
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return j + 1;
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}
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static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb,
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struct hv_netvsc_packet *packet,
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struct hv_page_buffer **page_buf)
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{
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struct hv_page_buffer *pb = *page_buf;
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u32 slots_used = 0;
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char *data = skb->data;
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int frags = skb_shinfo(skb)->nr_frags;
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int i;
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/* The packet is laid out thus:
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* 1. hdr: RNDIS header and PPI
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* 2. skb linear data
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* 3. skb fragment data
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*/
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if (hdr != NULL)
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slots_used += fill_pg_buf(virt_to_page(hdr),
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offset_in_page(hdr),
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len, &pb[slots_used]);
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packet->rmsg_size = len;
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packet->rmsg_pgcnt = slots_used;
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slots_used += fill_pg_buf(virt_to_page(data),
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offset_in_page(data),
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skb_headlen(skb), &pb[slots_used]);
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for (i = 0; i < frags; i++) {
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skb_frag_t *frag = skb_shinfo(skb)->frags + i;
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slots_used += fill_pg_buf(skb_frag_page(frag),
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frag->page_offset,
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skb_frag_size(frag), &pb[slots_used]);
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}
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return slots_used;
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}
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static int count_skb_frag_slots(struct sk_buff *skb)
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{
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int i, frags = skb_shinfo(skb)->nr_frags;
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int pages = 0;
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for (i = 0; i < frags; i++) {
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skb_frag_t *frag = skb_shinfo(skb)->frags + i;
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unsigned long size = skb_frag_size(frag);
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unsigned long offset = frag->page_offset;
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/* Skip unused frames from start of page */
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offset &= ~PAGE_MASK;
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pages += PFN_UP(offset + size);
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}
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return pages;
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}
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static int netvsc_get_slots(struct sk_buff *skb)
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{
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char *data = skb->data;
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unsigned int offset = offset_in_page(data);
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unsigned int len = skb_headlen(skb);
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int slots;
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int frag_slots;
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slots = DIV_ROUND_UP(offset + len, PAGE_SIZE);
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frag_slots = count_skb_frag_slots(skb);
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return slots + frag_slots;
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}
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static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off)
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{
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u32 ret_val = TRANSPORT_INFO_NOT_IP;
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if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) &&
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(eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) {
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goto not_ip;
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}
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*trans_off = skb_transport_offset(skb);
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if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) {
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struct iphdr *iphdr = ip_hdr(skb);
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if (iphdr->protocol == IPPROTO_TCP)
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ret_val = TRANSPORT_INFO_IPV4_TCP;
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else if (iphdr->protocol == IPPROTO_UDP)
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ret_val = TRANSPORT_INFO_IPV4_UDP;
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} else {
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if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
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ret_val = TRANSPORT_INFO_IPV6_TCP;
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else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
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ret_val = TRANSPORT_INFO_IPV6_UDP;
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}
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not_ip:
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return ret_val;
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}
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static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct hv_netvsc_packet *packet = NULL;
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int ret;
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unsigned int num_data_pgs;
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struct rndis_message *rndis_msg;
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struct rndis_packet *rndis_pkt;
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u32 rndis_msg_size;
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struct rndis_per_packet_info *ppi;
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struct ndis_tcp_ip_checksum_info *csum_info;
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int hdr_offset;
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u32 net_trans_info;
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u32 hash;
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u32 skb_length;
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struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT];
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struct hv_page_buffer *pb = page_buf;
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/* We will atmost need two pages to describe the rndis
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* header. We can only transmit MAX_PAGE_BUFFER_COUNT number
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* of pages in a single packet. If skb is scattered around
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* more pages we try linearizing it.
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*/
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skb_length = skb->len;
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num_data_pgs = netvsc_get_slots(skb) + 2;
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if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) {
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++net_device_ctx->eth_stats.tx_scattered;
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if (skb_linearize(skb))
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goto no_memory;
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num_data_pgs = netvsc_get_slots(skb) + 2;
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if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) {
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++net_device_ctx->eth_stats.tx_too_big;
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goto drop;
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}
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}
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/*
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* Place the rndis header in the skb head room and
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* the skb->cb will be used for hv_netvsc_packet
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* structure.
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*/
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ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE);
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if (ret)
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goto no_memory;
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/* Use the skb control buffer for building up the packet */
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BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) >
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FIELD_SIZEOF(struct sk_buff, cb));
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packet = (struct hv_netvsc_packet *)skb->cb;
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packet->q_idx = skb_get_queue_mapping(skb);
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packet->total_data_buflen = skb->len;
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rndis_msg = (struct rndis_message *)skb->head;
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memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE);
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/* Add the rndis header */
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rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET;
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rndis_msg->msg_len = packet->total_data_buflen;
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rndis_pkt = &rndis_msg->msg.pkt;
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rndis_pkt->data_offset = sizeof(struct rndis_packet);
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rndis_pkt->data_len = packet->total_data_buflen;
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rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet);
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rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
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hash = skb_get_hash_raw(skb);
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if (hash != 0 && net->real_num_tx_queues > 1) {
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rndis_msg_size += NDIS_HASH_PPI_SIZE;
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ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE,
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NBL_HASH_VALUE);
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*(u32 *)((void *)ppi + ppi->ppi_offset) = hash;
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}
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if (skb_vlan_tag_present(skb)) {
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struct ndis_pkt_8021q_info *vlan;
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rndis_msg_size += NDIS_VLAN_PPI_SIZE;
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ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE,
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IEEE_8021Q_INFO);
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vlan = (struct ndis_pkt_8021q_info *)((void *)ppi +
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ppi->ppi_offset);
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vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK;
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vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >>
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VLAN_PRIO_SHIFT;
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}
|
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net_trans_info = get_net_transport_info(skb, &hdr_offset);
|
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|
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/*
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* Setup the sendside checksum offload only if this is not a
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* GSO packet.
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*/
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if ((net_trans_info & (INFO_TCP | INFO_UDP)) && skb_is_gso(skb)) {
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struct ndis_tcp_lso_info *lso_info;
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rndis_msg_size += NDIS_LSO_PPI_SIZE;
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ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
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TCP_LARGESEND_PKTINFO);
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lso_info = (struct ndis_tcp_lso_info *)((void *)ppi +
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ppi->ppi_offset);
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lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE;
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if (net_trans_info & (INFO_IPV4 << 16)) {
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lso_info->lso_v2_transmit.ip_version =
|
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NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4;
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ip_hdr(skb)->tot_len = 0;
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ip_hdr(skb)->check = 0;
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tcp_hdr(skb)->check =
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~csum_tcpudp_magic(ip_hdr(skb)->saddr,
|
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ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
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} else {
|
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lso_info->lso_v2_transmit.ip_version =
|
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NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6;
|
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ipv6_hdr(skb)->payload_len = 0;
|
|
tcp_hdr(skb)->check =
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~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
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&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
|
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}
|
|
lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset;
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lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size;
|
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} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
if (net_trans_info & INFO_TCP) {
|
|
rndis_msg_size += NDIS_CSUM_PPI_SIZE;
|
|
ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
|
|
TCPIP_CHKSUM_PKTINFO);
|
|
|
|
csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi +
|
|
ppi->ppi_offset);
|
|
|
|
if (net_trans_info & (INFO_IPV4 << 16))
|
|
csum_info->transmit.is_ipv4 = 1;
|
|
else
|
|
csum_info->transmit.is_ipv6 = 1;
|
|
|
|
csum_info->transmit.tcp_checksum = 1;
|
|
csum_info->transmit.tcp_header_offset = hdr_offset;
|
|
} else {
|
|
/* UDP checksum (and other) offload is not supported. */
|
|
if (skb_checksum_help(skb))
|
|
goto drop;
|
|
}
|
|
}
|
|
|
|
/* Start filling in the page buffers with the rndis hdr */
|
|
rndis_msg->msg_len += rndis_msg_size;
|
|
packet->total_data_buflen = rndis_msg->msg_len;
|
|
packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
|
|
skb, packet, &pb);
|
|
|
|
/* timestamp packet in software */
|
|
skb_tx_timestamp(skb);
|
|
ret = netvsc_send(net_device_ctx->device_ctx, packet,
|
|
rndis_msg, &pb, skb);
|
|
if (likely(ret == 0)) {
|
|
struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats);
|
|
|
|
u64_stats_update_begin(&tx_stats->syncp);
|
|
tx_stats->packets++;
|
|
tx_stats->bytes += skb_length;
|
|
u64_stats_update_end(&tx_stats->syncp);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
if (ret == -EAGAIN) {
|
|
++net_device_ctx->eth_stats.tx_busy;
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
if (ret == -ENOSPC)
|
|
++net_device_ctx->eth_stats.tx_no_space;
|
|
|
|
drop:
|
|
dev_kfree_skb_any(skb);
|
|
net->stats.tx_dropped++;
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
no_memory:
|
|
++net_device_ctx->eth_stats.tx_no_memory;
|
|
goto drop;
|
|
}
|
|
|
|
/*
|
|
* netvsc_linkstatus_callback - Link up/down notification
|
|
*/
|
|
void netvsc_linkstatus_callback(struct hv_device *device_obj,
|
|
struct rndis_message *resp)
|
|
{
|
|
struct rndis_indicate_status *indicate = &resp->msg.indicate_status;
|
|
struct net_device *net;
|
|
struct net_device_context *ndev_ctx;
|
|
struct netvsc_reconfig *event;
|
|
unsigned long flags;
|
|
|
|
net = hv_get_drvdata(device_obj);
|
|
|
|
if (!net)
|
|
return;
|
|
|
|
ndev_ctx = netdev_priv(net);
|
|
|
|
/* Update the physical link speed when changing to another vSwitch */
|
|
if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) {
|
|
u32 speed;
|
|
|
|
speed = *(u32 *)((void *)indicate + indicate->
|
|
status_buf_offset) / 10000;
|
|
ndev_ctx->speed = speed;
|
|
return;
|
|
}
|
|
|
|
/* Handle these link change statuses below */
|
|
if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE &&
|
|
indicate->status != RNDIS_STATUS_MEDIA_CONNECT &&
|
|
indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT)
|
|
return;
|
|
|
|
if (net->reg_state != NETREG_REGISTERED)
|
|
return;
|
|
|
|
event = kzalloc(sizeof(*event), GFP_ATOMIC);
|
|
if (!event)
|
|
return;
|
|
event->event = indicate->status;
|
|
|
|
spin_lock_irqsave(&ndev_ctx->lock, flags);
|
|
list_add_tail(&event->list, &ndev_ctx->reconfig_events);
|
|
spin_unlock_irqrestore(&ndev_ctx->lock, flags);
|
|
|
|
schedule_delayed_work(&ndev_ctx->dwork, 0);
|
|
}
|
|
|
|
static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
|
|
struct hv_netvsc_packet *packet,
|
|
struct ndis_tcp_ip_checksum_info *csum_info,
|
|
void *data, u16 vlan_tci)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen);
|
|
if (!skb)
|
|
return skb;
|
|
|
|
/*
|
|
* Copy to skb. This copy is needed here since the memory pointed by
|
|
* hv_netvsc_packet cannot be deallocated
|
|
*/
|
|
memcpy(skb_put(skb, packet->total_data_buflen), data,
|
|
packet->total_data_buflen);
|
|
|
|
skb->protocol = eth_type_trans(skb, net);
|
|
|
|
/* skb is already created with CHECKSUM_NONE */
|
|
skb_checksum_none_assert(skb);
|
|
|
|
/*
|
|
* In Linux, the IP checksum is always checked.
|
|
* Do L4 checksum offload if enabled and present.
|
|
*/
|
|
if (csum_info && (net->features & NETIF_F_RXCSUM)) {
|
|
if (csum_info->receive.tcp_checksum_succeeded ||
|
|
csum_info->receive.udp_checksum_succeeded)
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
}
|
|
|
|
if (vlan_tci & VLAN_TAG_PRESENT)
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
vlan_tci);
|
|
|
|
return skb;
|
|
}
|
|
|
|
/*
|
|
* netvsc_recv_callback - Callback when we receive a packet from the
|
|
* "wire" on the specified device.
|
|
*/
|
|
int netvsc_recv_callback(struct hv_device *device_obj,
|
|
struct hv_netvsc_packet *packet,
|
|
void **data,
|
|
struct ndis_tcp_ip_checksum_info *csum_info,
|
|
struct vmbus_channel *channel,
|
|
u16 vlan_tci)
|
|
{
|
|
struct net_device *net = hv_get_drvdata(device_obj);
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
struct net_device *vf_netdev;
|
|
struct sk_buff *skb;
|
|
struct netvsc_stats *rx_stats;
|
|
|
|
if (net->reg_state != NETREG_REGISTERED)
|
|
return NVSP_STAT_FAIL;
|
|
|
|
/*
|
|
* If necessary, inject this packet into the VF interface.
|
|
* On Hyper-V, multicast and brodcast packets are only delivered
|
|
* to the synthetic interface (after subjecting these to
|
|
* policy filters on the host). Deliver these via the VF
|
|
* interface in the guest.
|
|
*/
|
|
vf_netdev = rcu_dereference(net_device_ctx->vf_netdev);
|
|
if (vf_netdev && (vf_netdev->flags & IFF_UP))
|
|
net = vf_netdev;
|
|
|
|
/* Allocate a skb - TODO direct I/O to pages? */
|
|
skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci);
|
|
if (unlikely(!skb)) {
|
|
++net->stats.rx_dropped;
|
|
return NVSP_STAT_FAIL;
|
|
}
|
|
|
|
if (net != vf_netdev)
|
|
skb_record_rx_queue(skb,
|
|
channel->offermsg.offer.sub_channel_index);
|
|
|
|
/*
|
|
* Even if injecting the packet, record the statistics
|
|
* on the synthetic device because modifying the VF device
|
|
* statistics will not work correctly.
|
|
*/
|
|
rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
|
|
u64_stats_update_begin(&rx_stats->syncp);
|
|
rx_stats->packets++;
|
|
rx_stats->bytes += packet->total_data_buflen;
|
|
|
|
if (skb->pkt_type == PACKET_BROADCAST)
|
|
++rx_stats->broadcast;
|
|
else if (skb->pkt_type == PACKET_MULTICAST)
|
|
++rx_stats->multicast;
|
|
u64_stats_update_end(&rx_stats->syncp);
|
|
|
|
/*
|
|
* Pass the skb back up. Network stack will deallocate the skb when it
|
|
* is done.
|
|
* TODO - use NAPI?
|
|
*/
|
|
netif_rx(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void netvsc_get_drvinfo(struct net_device *net,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
|
|
strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
|
|
}
|
|
|
|
static void netvsc_get_channels(struct net_device *net,
|
|
struct ethtool_channels *channel)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
struct netvsc_device *nvdev = net_device_ctx->nvdev;
|
|
|
|
if (nvdev) {
|
|
channel->max_combined = nvdev->max_chn;
|
|
channel->combined_count = nvdev->num_chn;
|
|
}
|
|
}
|
|
|
|
static int netvsc_set_channels(struct net_device *net,
|
|
struct ethtool_channels *channels)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
struct hv_device *dev = net_device_ctx->device_ctx;
|
|
struct netvsc_device *nvdev = net_device_ctx->nvdev;
|
|
struct netvsc_device_info device_info;
|
|
u32 num_chn;
|
|
u32 max_chn;
|
|
int ret = 0;
|
|
bool recovering = false;
|
|
|
|
if (net_device_ctx->start_remove || !nvdev || nvdev->destroy)
|
|
return -ENODEV;
|
|
|
|
num_chn = nvdev->num_chn;
|
|
max_chn = min_t(u32, nvdev->max_chn, num_online_cpus());
|
|
|
|
if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) {
|
|
pr_info("vRSS unsupported before NVSP Version 5\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* We do not support rx, tx, or other */
|
|
if (!channels ||
|
|
channels->rx_count ||
|
|
channels->tx_count ||
|
|
channels->other_count ||
|
|
(channels->combined_count < 1))
|
|
return -EINVAL;
|
|
|
|
if (channels->combined_count > max_chn) {
|
|
pr_info("combined channels too high, using %d\n", max_chn);
|
|
channels->combined_count = max_chn;
|
|
}
|
|
|
|
ret = netvsc_close(net);
|
|
if (ret)
|
|
goto out;
|
|
|
|
do_set:
|
|
net_device_ctx->start_remove = true;
|
|
rndis_filter_device_remove(dev);
|
|
|
|
nvdev->num_chn = channels->combined_count;
|
|
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */
|
|
device_info.ring_size = ring_size;
|
|
device_info.max_num_vrss_chns = max_num_vrss_chns;
|
|
|
|
ret = rndis_filter_device_add(dev, &device_info);
|
|
if (ret) {
|
|
if (recovering) {
|
|
netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);
|
|
return ret;
|
|
}
|
|
goto recover;
|
|
}
|
|
|
|
nvdev = net_device_ctx->nvdev;
|
|
|
|
ret = netif_set_real_num_tx_queues(net, nvdev->num_chn);
|
|
if (ret) {
|
|
if (recovering) {
|
|
netdev_err(net, "could not set tx queue count (ret %d)\n", ret);
|
|
return ret;
|
|
}
|
|
goto recover;
|
|
}
|
|
|
|
ret = netif_set_real_num_rx_queues(net, nvdev->num_chn);
|
|
if (ret) {
|
|
if (recovering) {
|
|
netdev_err(net, "could not set rx queue count (ret %d)\n", ret);
|
|
return ret;
|
|
}
|
|
goto recover;
|
|
}
|
|
|
|
out:
|
|
netvsc_open(net);
|
|
net_device_ctx->start_remove = false;
|
|
/* We may have missed link change notifications */
|
|
schedule_delayed_work(&net_device_ctx->dwork, 0);
|
|
|
|
return ret;
|
|
|
|
recover:
|
|
/* If the above failed, we attempt to recover through the same
|
|
* process but with the original number of channels.
|
|
*/
|
|
netdev_err(net, "could not set channels, recovering\n");
|
|
recovering = true;
|
|
channels->combined_count = num_chn;
|
|
goto do_set;
|
|
}
|
|
|
|
static bool netvsc_validate_ethtool_ss_cmd(const struct ethtool_cmd *cmd)
|
|
{
|
|
struct ethtool_cmd diff1 = *cmd;
|
|
struct ethtool_cmd diff2 = {};
|
|
|
|
ethtool_cmd_speed_set(&diff1, 0);
|
|
diff1.duplex = 0;
|
|
/* advertising and cmd are usually set */
|
|
diff1.advertising = 0;
|
|
diff1.cmd = 0;
|
|
/* We set port to PORT_OTHER */
|
|
diff2.port = PORT_OTHER;
|
|
|
|
return !memcmp(&diff1, &diff2, sizeof(diff1));
|
|
}
|
|
|
|
static void netvsc_init_settings(struct net_device *dev)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
|
|
ndc->speed = SPEED_UNKNOWN;
|
|
ndc->duplex = DUPLEX_UNKNOWN;
|
|
}
|
|
|
|
static int netvsc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
|
|
ethtool_cmd_speed_set(cmd, ndc->speed);
|
|
cmd->duplex = ndc->duplex;
|
|
cmd->port = PORT_OTHER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
u32 speed;
|
|
|
|
speed = ethtool_cmd_speed(cmd);
|
|
if (!ethtool_validate_speed(speed) ||
|
|
!ethtool_validate_duplex(cmd->duplex) ||
|
|
!netvsc_validate_ethtool_ss_cmd(cmd))
|
|
return -EINVAL;
|
|
|
|
ndc->speed = speed;
|
|
ndc->duplex = cmd->duplex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_change_mtu(struct net_device *ndev, int mtu)
|
|
{
|
|
struct net_device_context *ndevctx = netdev_priv(ndev);
|
|
struct netvsc_device *nvdev = ndevctx->nvdev;
|
|
struct hv_device *hdev = ndevctx->device_ctx;
|
|
struct netvsc_device_info device_info;
|
|
u32 num_chn;
|
|
int ret = 0;
|
|
|
|
if (ndevctx->start_remove || !nvdev || nvdev->destroy)
|
|
return -ENODEV;
|
|
|
|
ret = netvsc_close(ndev);
|
|
if (ret)
|
|
goto out;
|
|
|
|
num_chn = nvdev->num_chn;
|
|
|
|
ndevctx->start_remove = true;
|
|
rndis_filter_device_remove(hdev);
|
|
|
|
ndev->mtu = mtu;
|
|
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.ring_size = ring_size;
|
|
device_info.num_chn = num_chn;
|
|
device_info.max_num_vrss_chns = max_num_vrss_chns;
|
|
rndis_filter_device_add(hdev, &device_info);
|
|
|
|
out:
|
|
netvsc_open(ndev);
|
|
ndevctx->start_remove = false;
|
|
|
|
/* We may have missed link change notifications */
|
|
schedule_delayed_work(&ndevctx->dwork, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net,
|
|
struct rtnl_link_stats64 *t)
|
|
{
|
|
struct net_device_context *ndev_ctx = netdev_priv(net);
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats,
|
|
cpu);
|
|
struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats,
|
|
cpu);
|
|
u64 tx_packets, tx_bytes, rx_packets, rx_bytes, rx_multicast;
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&tx_stats->syncp);
|
|
tx_packets = tx_stats->packets;
|
|
tx_bytes = tx_stats->bytes;
|
|
} while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start));
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&rx_stats->syncp);
|
|
rx_packets = rx_stats->packets;
|
|
rx_bytes = rx_stats->bytes;
|
|
rx_multicast = rx_stats->multicast + rx_stats->broadcast;
|
|
} while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
|
|
|
|
t->tx_bytes += tx_bytes;
|
|
t->tx_packets += tx_packets;
|
|
t->rx_bytes += rx_bytes;
|
|
t->rx_packets += rx_packets;
|
|
t->multicast += rx_multicast;
|
|
}
|
|
|
|
t->tx_dropped = net->stats.tx_dropped;
|
|
t->tx_errors = net->stats.tx_dropped;
|
|
|
|
t->rx_dropped = net->stats.rx_dropped;
|
|
t->rx_errors = net->stats.rx_errors;
|
|
|
|
return t;
|
|
}
|
|
|
|
static int netvsc_set_mac_addr(struct net_device *ndev, void *p)
|
|
{
|
|
struct sockaddr *addr = p;
|
|
char save_adr[ETH_ALEN];
|
|
unsigned char save_aatype;
|
|
int err;
|
|
|
|
memcpy(save_adr, ndev->dev_addr, ETH_ALEN);
|
|
save_aatype = ndev->addr_assign_type;
|
|
|
|
err = eth_mac_addr(ndev, p);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
err = rndis_filter_set_device_mac(ndev, addr->sa_data);
|
|
if (err != 0) {
|
|
/* roll back to saved MAC */
|
|
memcpy(ndev->dev_addr, save_adr, ETH_ALEN);
|
|
ndev->addr_assign_type = save_aatype;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct {
|
|
char name[ETH_GSTRING_LEN];
|
|
u16 offset;
|
|
} netvsc_stats[] = {
|
|
{ "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) },
|
|
{ "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) },
|
|
{ "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) },
|
|
{ "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) },
|
|
{ "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) },
|
|
};
|
|
|
|
static int netvsc_get_sset_count(struct net_device *dev, int string_set)
|
|
{
|
|
switch (string_set) {
|
|
case ETH_SS_STATS:
|
|
return ARRAY_SIZE(netvsc_stats);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static void netvsc_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats, u64 *data)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
const void *nds = &ndc->eth_stats;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++)
|
|
data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset);
|
|
}
|
|
|
|
static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data)
|
|
{
|
|
int i;
|
|
|
|
switch (stringset) {
|
|
case ETH_SS_STATS:
|
|
for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++)
|
|
memcpy(data + i * ETH_GSTRING_LEN,
|
|
netvsc_stats[i].name, ETH_GSTRING_LEN);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void netvsc_poll_controller(struct net_device *net)
|
|
{
|
|
/* As netvsc_start_xmit() works synchronous we don't have to
|
|
* trigger anything here.
|
|
*/
|
|
}
|
|
#endif
|
|
|
|
static const struct ethtool_ops ethtool_ops = {
|
|
.get_drvinfo = netvsc_get_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_ethtool_stats = netvsc_get_ethtool_stats,
|
|
.get_sset_count = netvsc_get_sset_count,
|
|
.get_strings = netvsc_get_strings,
|
|
.get_channels = netvsc_get_channels,
|
|
.set_channels = netvsc_set_channels,
|
|
.get_ts_info = ethtool_op_get_ts_info,
|
|
.get_settings = netvsc_get_settings,
|
|
.set_settings = netvsc_set_settings,
|
|
};
|
|
|
|
static const struct net_device_ops device_ops = {
|
|
.ndo_open = netvsc_open,
|
|
.ndo_stop = netvsc_close,
|
|
.ndo_start_xmit = netvsc_start_xmit,
|
|
.ndo_set_rx_mode = netvsc_set_multicast_list,
|
|
.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,
|
|
.ndo_get_stats64 = netvsc_get_stats64,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = netvsc_poll_controller,
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link
|
|
* down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is
|
|
* present send GARP packet to network peers with netif_notify_peers().
|
|
*/
|
|
static void netvsc_link_change(struct work_struct *w)
|
|
{
|
|
struct net_device_context *ndev_ctx =
|
|
container_of(w, struct net_device_context, dwork.work);
|
|
struct hv_device *device_obj = ndev_ctx->device_ctx;
|
|
struct net_device *net = hv_get_drvdata(device_obj);
|
|
struct netvsc_device *net_device;
|
|
struct rndis_device *rdev;
|
|
struct netvsc_reconfig *event = NULL;
|
|
bool notify = false, reschedule = false;
|
|
unsigned long flags, next_reconfig, delay;
|
|
|
|
rtnl_lock();
|
|
if (ndev_ctx->start_remove)
|
|
goto out_unlock;
|
|
|
|
net_device = ndev_ctx->nvdev;
|
|
rdev = net_device->extension;
|
|
|
|
next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT;
|
|
if (time_is_after_jiffies(next_reconfig)) {
|
|
/* link_watch only sends one notification with current state
|
|
* per second, avoid doing reconfig more frequently. Handle
|
|
* wrap around.
|
|
*/
|
|
delay = next_reconfig - jiffies;
|
|
delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT;
|
|
schedule_delayed_work(&ndev_ctx->dwork, delay);
|
|
goto out_unlock;
|
|
}
|
|
ndev_ctx->last_reconfig = jiffies;
|
|
|
|
spin_lock_irqsave(&ndev_ctx->lock, flags);
|
|
if (!list_empty(&ndev_ctx->reconfig_events)) {
|
|
event = list_first_entry(&ndev_ctx->reconfig_events,
|
|
struct netvsc_reconfig, list);
|
|
list_del(&event->list);
|
|
reschedule = !list_empty(&ndev_ctx->reconfig_events);
|
|
}
|
|
spin_unlock_irqrestore(&ndev_ctx->lock, flags);
|
|
|
|
if (!event)
|
|
goto out_unlock;
|
|
|
|
switch (event->event) {
|
|
/* Only the following events are possible due to the check in
|
|
* netvsc_linkstatus_callback()
|
|
*/
|
|
case RNDIS_STATUS_MEDIA_CONNECT:
|
|
if (rdev->link_state) {
|
|
rdev->link_state = false;
|
|
netif_carrier_on(net);
|
|
netif_tx_wake_all_queues(net);
|
|
} else {
|
|
notify = true;
|
|
}
|
|
kfree(event);
|
|
break;
|
|
case RNDIS_STATUS_MEDIA_DISCONNECT:
|
|
if (!rdev->link_state) {
|
|
rdev->link_state = true;
|
|
netif_carrier_off(net);
|
|
netif_tx_stop_all_queues(net);
|
|
}
|
|
kfree(event);
|
|
break;
|
|
case RNDIS_STATUS_NETWORK_CHANGE:
|
|
/* Only makes sense if carrier is present */
|
|
if (!rdev->link_state) {
|
|
rdev->link_state = true;
|
|
netif_carrier_off(net);
|
|
netif_tx_stop_all_queues(net);
|
|
event->event = RNDIS_STATUS_MEDIA_CONNECT;
|
|
spin_lock_irqsave(&ndev_ctx->lock, flags);
|
|
list_add(&event->list, &ndev_ctx->reconfig_events);
|
|
spin_unlock_irqrestore(&ndev_ctx->lock, flags);
|
|
reschedule = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
if (notify)
|
|
netdev_notify_peers(net);
|
|
|
|
/* link_watch only sends one notification with current state per
|
|
* second, handle next reconfig event in 2 seconds.
|
|
*/
|
|
if (reschedule)
|
|
schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT);
|
|
|
|
return;
|
|
|
|
out_unlock:
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static void netvsc_free_netdev(struct net_device *netdev)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(netdev);
|
|
|
|
free_percpu(net_device_ctx->tx_stats);
|
|
free_percpu(net_device_ctx->rx_stats);
|
|
free_netdev(netdev);
|
|
}
|
|
|
|
static struct net_device *get_netvsc_bymac(const u8 *mac)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
if (dev->netdev_ops != &device_ops)
|
|
continue; /* not a netvsc device */
|
|
|
|
if (ether_addr_equal(mac, dev->perm_addr))
|
|
return dev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct net_device *get_netvsc_byref(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
struct net_device_context *net_device_ctx;
|
|
|
|
if (dev->netdev_ops != &device_ops)
|
|
continue; /* not a netvsc device */
|
|
|
|
net_device_ctx = netdev_priv(dev);
|
|
if (net_device_ctx->nvdev == NULL)
|
|
continue; /* device is removed */
|
|
|
|
if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev)
|
|
return dev; /* a match */
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int netvsc_register_vf(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *ndev;
|
|
struct net_device_context *net_device_ctx;
|
|
struct netvsc_device *netvsc_dev;
|
|
|
|
if (vf_netdev->addr_len != ETH_ALEN)
|
|
return NOTIFY_DONE;
|
|
|
|
/*
|
|
* We will use the MAC address to locate the synthetic interface to
|
|
* associate with the VF interface. If we don't find a matching
|
|
* synthetic interface, move on.
|
|
*/
|
|
ndev = get_netvsc_bymac(vf_netdev->perm_addr);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
netvsc_dev = net_device_ctx->nvdev;
|
|
if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev))
|
|
return NOTIFY_DONE;
|
|
|
|
netdev_info(ndev, "VF registering: %s\n", vf_netdev->name);
|
|
/*
|
|
* Take a reference on the module.
|
|
*/
|
|
try_module_get(THIS_MODULE);
|
|
|
|
dev_hold(vf_netdev);
|
|
rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev);
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int netvsc_vf_up(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *ndev;
|
|
struct netvsc_device *netvsc_dev;
|
|
struct net_device_context *net_device_ctx;
|
|
|
|
ndev = get_netvsc_byref(vf_netdev);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
netvsc_dev = net_device_ctx->nvdev;
|
|
|
|
netdev_info(ndev, "VF up: %s\n", vf_netdev->name);
|
|
|
|
/*
|
|
* Open the device before switching data path.
|
|
*/
|
|
rndis_filter_open(netvsc_dev);
|
|
|
|
/*
|
|
* notify the host to switch the data path.
|
|
*/
|
|
netvsc_switch_datapath(ndev, true);
|
|
netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name);
|
|
|
|
netif_carrier_off(ndev);
|
|
|
|
/* Now notify peers through VF device. */
|
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, vf_netdev);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int netvsc_vf_down(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *ndev;
|
|
struct netvsc_device *netvsc_dev;
|
|
struct net_device_context *net_device_ctx;
|
|
|
|
ndev = get_netvsc_byref(vf_netdev);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
netvsc_dev = net_device_ctx->nvdev;
|
|
|
|
netdev_info(ndev, "VF down: %s\n", vf_netdev->name);
|
|
netvsc_switch_datapath(ndev, false);
|
|
netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name);
|
|
rndis_filter_close(netvsc_dev);
|
|
netif_carrier_on(ndev);
|
|
|
|
/* Now notify peers through netvsc device. */
|
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, ndev);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int netvsc_unregister_vf(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *ndev;
|
|
struct netvsc_device *netvsc_dev;
|
|
struct net_device_context *net_device_ctx;
|
|
|
|
ndev = get_netvsc_byref(vf_netdev);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
netvsc_dev = net_device_ctx->nvdev;
|
|
|
|
netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name);
|
|
|
|
RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL);
|
|
dev_put(vf_netdev);
|
|
module_put(THIS_MODULE);
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int netvsc_probe(struct hv_device *dev,
|
|
const struct hv_vmbus_device_id *dev_id)
|
|
{
|
|
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_mq(sizeof(struct net_device_context),
|
|
num_online_cpus());
|
|
if (!net)
|
|
return -ENOMEM;
|
|
|
|
netif_carrier_off(net);
|
|
|
|
netvsc_init_settings(net);
|
|
|
|
net_device_ctx = netdev_priv(net);
|
|
net_device_ctx->device_ctx = dev;
|
|
net_device_ctx->msg_enable = netif_msg_init(debug, default_msg);
|
|
if (netif_msg_probe(net_device_ctx))
|
|
netdev_dbg(net, "netvsc msg_enable: %d\n",
|
|
net_device_ctx->msg_enable);
|
|
|
|
net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats);
|
|
if (!net_device_ctx->tx_stats) {
|
|
free_netdev(net);
|
|
return -ENOMEM;
|
|
}
|
|
net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats);
|
|
if (!net_device_ctx->rx_stats) {
|
|
free_percpu(net_device_ctx->tx_stats);
|
|
free_netdev(net);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hv_set_drvdata(dev, net);
|
|
|
|
net_device_ctx->start_remove = false;
|
|
|
|
INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change);
|
|
INIT_WORK(&net_device_ctx->work, do_set_multicast);
|
|
|
|
spin_lock_init(&net_device_ctx->lock);
|
|
INIT_LIST_HEAD(&net_device_ctx->reconfig_events);
|
|
|
|
net->netdev_ops = &device_ops;
|
|
|
|
net->hw_features = NETVSC_HW_FEATURES;
|
|
net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX;
|
|
|
|
net->ethtool_ops = ðtool_ops;
|
|
SET_NETDEV_DEV(net, &dev->device);
|
|
|
|
/* We always need headroom for rndis header */
|
|
net->needed_headroom = RNDIS_AND_PPI_SIZE;
|
|
|
|
/* Notify the netvsc driver of the new device */
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.ring_size = ring_size;
|
|
device_info.max_num_vrss_chns = max_num_vrss_chns;
|
|
ret = rndis_filter_device_add(dev, &device_info);
|
|
if (ret != 0) {
|
|
netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);
|
|
netvsc_free_netdev(net);
|
|
hv_set_drvdata(dev, NULL);
|
|
return ret;
|
|
}
|
|
memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
|
|
|
|
nvdev = net_device_ctx->nvdev;
|
|
netif_set_real_num_tx_queues(net, nvdev->num_chn);
|
|
netif_set_real_num_rx_queues(net, nvdev->num_chn);
|
|
netif_set_gso_max_size(net, NETVSC_GSO_MAX_SIZE);
|
|
|
|
/* MTU range: 68 - 1500 or 65521 */
|
|
net->min_mtu = NETVSC_MTU_MIN;
|
|
if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2)
|
|
net->max_mtu = NETVSC_MTU - ETH_HLEN;
|
|
else
|
|
net->max_mtu = ETH_DATA_LEN;
|
|
|
|
ret = register_netdev(net);
|
|
if (ret != 0) {
|
|
pr_err("Unable to register netdev.\n");
|
|
rndis_filter_device_remove(dev);
|
|
netvsc_free_netdev(net);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int netvsc_remove(struct hv_device *dev)
|
|
{
|
|
struct net_device *net;
|
|
struct net_device_context *ndev_ctx;
|
|
struct netvsc_device *net_device;
|
|
|
|
net = hv_get_drvdata(dev);
|
|
|
|
if (net == NULL) {
|
|
dev_err(&dev->device, "No net device to remove\n");
|
|
return 0;
|
|
}
|
|
|
|
ndev_ctx = netdev_priv(net);
|
|
net_device = ndev_ctx->nvdev;
|
|
|
|
/* Avoid racing with netvsc_change_mtu()/netvsc_set_channels()
|
|
* removing the device.
|
|
*/
|
|
rtnl_lock();
|
|
ndev_ctx->start_remove = true;
|
|
rtnl_unlock();
|
|
|
|
cancel_delayed_work_sync(&ndev_ctx->dwork);
|
|
cancel_work_sync(&ndev_ctx->work);
|
|
|
|
/* Stop outbound asap */
|
|
netif_tx_disable(net);
|
|
|
|
unregister_netdev(net);
|
|
|
|
/*
|
|
* Call to the vsc driver to let it know that the device is being
|
|
* removed
|
|
*/
|
|
rndis_filter_device_remove(dev);
|
|
|
|
hv_set_drvdata(dev, NULL);
|
|
|
|
netvsc_free_netdev(net);
|
|
return 0;
|
|
}
|
|
|
|
static const struct hv_vmbus_device_id id_table[] = {
|
|
/* Network guid */
|
|
{ HV_NIC_GUID, },
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(vmbus, id_table);
|
|
|
|
/* The one and only one */
|
|
static struct hv_driver netvsc_drv = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = id_table,
|
|
.probe = netvsc_probe,
|
|
.remove = netvsc_remove,
|
|
};
|
|
|
|
/*
|
|
* On Hyper-V, every VF interface is matched with a corresponding
|
|
* synthetic interface. The synthetic interface is presented first
|
|
* to the guest. When the corresponding VF instance is registered,
|
|
* we will take care of switching the data path.
|
|
*/
|
|
static int netvsc_netdev_event(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
|
|
|
|
/* Skip our own events */
|
|
if (event_dev->netdev_ops == &device_ops)
|
|
return NOTIFY_DONE;
|
|
|
|
/* Avoid non-Ethernet type devices */
|
|
if (event_dev->type != ARPHRD_ETHER)
|
|
return NOTIFY_DONE;
|
|
|
|
/* Avoid Vlan dev with same MAC registering as VF */
|
|
if (event_dev->priv_flags & IFF_802_1Q_VLAN)
|
|
return NOTIFY_DONE;
|
|
|
|
/* Avoid Bonding master dev with same MAC registering as VF */
|
|
if ((event_dev->priv_flags & IFF_BONDING) &&
|
|
(event_dev->flags & IFF_MASTER))
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case NETDEV_REGISTER:
|
|
return netvsc_register_vf(event_dev);
|
|
case NETDEV_UNREGISTER:
|
|
return netvsc_unregister_vf(event_dev);
|
|
case NETDEV_UP:
|
|
return netvsc_vf_up(event_dev);
|
|
case NETDEV_DOWN:
|
|
return netvsc_vf_down(event_dev);
|
|
default:
|
|
return NOTIFY_DONE;
|
|
}
|
|
}
|
|
|
|
static struct notifier_block netvsc_netdev_notifier = {
|
|
.notifier_call = netvsc_netdev_event,
|
|
};
|
|
|
|
static void __exit netvsc_drv_exit(void)
|
|
{
|
|
unregister_netdevice_notifier(&netvsc_netdev_notifier);
|
|
vmbus_driver_unregister(&netvsc_drv);
|
|
}
|
|
|
|
static int __init netvsc_drv_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (ring_size < RING_SIZE_MIN) {
|
|
ring_size = RING_SIZE_MIN;
|
|
pr_info("Increased ring_size to %d (min allowed)\n",
|
|
ring_size);
|
|
}
|
|
ret = vmbus_driver_register(&netvsc_drv);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
register_netdevice_notifier(&netvsc_netdev_notifier);
|
|
return 0;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Microsoft Hyper-V network driver");
|
|
|
|
module_init(netvsc_drv_init);
|
|
module_exit(netvsc_drv_exit);
|