Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 2 | * Copyright (c) 2009, Microsoft Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
Jeff Kirsher | adf8d3f | 2013-12-06 06:28:47 -0800 | [diff] [blame] | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 15 | * |
| 16 | * Authors: |
Haiyang Zhang | d0e94d1 | 2009-11-23 17:00:22 +0000 | [diff] [blame] | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 18 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 19 | */ |
Hank Janssen | eb335bc | 2011-03-29 13:58:48 -0700 | [diff] [blame] | 20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 21 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 22 | #include <linux/init.h> |
K. Y. Srinivasan | 9079ce6 | 2011-06-16 13:16:37 -0700 | [diff] [blame] | 23 | #include <linux/atomic.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/highmem.h> |
| 26 | #include <linux/device.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 27 | #include <linux/io.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 28 | #include <linux/delay.h> |
| 29 | #include <linux/netdevice.h> |
| 30 | #include <linux/inetdevice.h> |
| 31 | #include <linux/etherdevice.h> |
| 32 | #include <linux/skbuff.h> |
Haiyang Zhang | c802db1 | 2013-05-28 06:15:56 +0000 | [diff] [blame] | 33 | #include <linux/if_vlan.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 34 | #include <linux/in.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 35 | #include <linux/slab.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 36 | #include <net/arp.h> |
| 37 | #include <net/route.h> |
| 38 | #include <net/sock.h> |
| 39 | #include <net/pkt_sched.h> |
K. Y. Srinivasan | 3f335ea | 2011-05-12 19:34:15 -0700 | [diff] [blame] | 40 | |
K. Y. Srinivasan | 5ca7252 | 2011-05-12 19:34:37 -0700 | [diff] [blame] | 41 | #include "hyperv_net.h" |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 42 | |
Haiyang Zhang | fa85a6c | 2012-07-25 08:08:41 +0000 | [diff] [blame] | 43 | #define RING_SIZE_MIN 64 |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 44 | #define LINKCHANGE_INT (2 * HZ) |
sixiao@microsoft.com | a060679 | 2016-02-04 15:49:34 -0800 | [diff] [blame] | 45 | #define NETVSC_HW_FEATURES (NETIF_F_RXCSUM | \ |
| 46 | NETIF_F_SG | \ |
| 47 | NETIF_F_TSO | \ |
| 48 | NETIF_F_TSO6 | \ |
| 49 | NETIF_F_HW_CSUM) |
Hank Janssen | 99c8da0 | 2010-10-12 10:45:23 -0700 | [diff] [blame] | 50 | static int ring_size = 128; |
Stephen Hemminger | 450d7a4 | 2010-05-04 09:58:53 -0700 | [diff] [blame] | 51 | module_param(ring_size, int, S_IRUGO); |
| 52 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 53 | |
KY Srinivasan | e01ec21 | 2015-05-27 13:16:57 -0700 | [diff] [blame] | 54 | static int max_num_vrss_chns = 8; |
| 55 | |
Simon Xiao | 3f300ff | 2015-04-28 01:05:17 -0700 | [diff] [blame] | 56 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
| 57 | NETIF_MSG_LINK | NETIF_MSG_IFUP | |
| 58 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | |
| 59 | NETIF_MSG_TX_ERR; |
| 60 | |
| 61 | static int debug = -1; |
| 62 | module_param(debug, int, S_IRUGO); |
| 63 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
| 64 | |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 65 | static void do_set_multicast(struct work_struct *w) |
| 66 | { |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 67 | struct net_device_context *ndevctx = |
| 68 | container_of(w, struct net_device_context, work); |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 69 | struct hv_device *device_obj = ndevctx->device_ctx; |
| 70 | struct net_device *ndev = hv_get_drvdata(device_obj); |
| 71 | struct netvsc_device *nvdev = ndevctx->nvdev; |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 72 | struct rndis_device *rdev; |
| 73 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 74 | if (!nvdev) |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 75 | return; |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 76 | |
| 77 | rdev = nvdev->extension; |
| 78 | if (rdev == NULL) |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 79 | return; |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 80 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 81 | if (ndev->flags & IFF_PROMISC) |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 82 | rndis_filter_set_packet_filter(rdev, |
| 83 | NDIS_PACKET_TYPE_PROMISCUOUS); |
| 84 | else |
| 85 | rndis_filter_set_packet_filter(rdev, |
| 86 | NDIS_PACKET_TYPE_BROADCAST | |
| 87 | NDIS_PACKET_TYPE_ALL_MULTICAST | |
| 88 | NDIS_PACKET_TYPE_DIRECTED); |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 89 | } |
| 90 | |
Greg Kroah-Hartman | 4e9bfef | 2009-07-15 12:45:20 -0700 | [diff] [blame] | 91 | static void netvsc_set_multicast_list(struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 92 | { |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 93 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Haiyang Zhang | d426b2e | 2011-11-30 07:19:08 -0800 | [diff] [blame] | 94 | |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 95 | schedule_work(&net_device_ctx->work); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 98 | static int netvsc_open(struct net_device *net) |
| 99 | { |
Vitaly Kuznetsov | 2f5fa6c | 2016-06-03 17:51:00 +0200 | [diff] [blame] | 100 | struct netvsc_device *nvdev = net_device_to_netvsc_device(net); |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 101 | struct rndis_device *rdev; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 102 | int ret = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 103 | |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 104 | netif_carrier_off(net); |
| 105 | |
Haiyang Zhang | d515d0f | 2011-09-28 13:24:15 -0700 | [diff] [blame] | 106 | /* Open up the device */ |
Vitaly Kuznetsov | 2f5fa6c | 2016-06-03 17:51:00 +0200 | [diff] [blame] | 107 | ret = rndis_filter_open(nvdev); |
Haiyang Zhang | d515d0f | 2011-09-28 13:24:15 -0700 | [diff] [blame] | 108 | if (ret != 0) { |
| 109 | netdev_err(net, "unable to open device (ret %d).\n", ret); |
| 110 | return ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 113 | netif_tx_wake_all_queues(net); |
Haiyang Zhang | d515d0f | 2011-09-28 13:24:15 -0700 | [diff] [blame] | 114 | |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 115 | rdev = nvdev->extension; |
| 116 | if (!rdev->link_state) |
| 117 | netif_carrier_on(net); |
| 118 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 119 | return ret; |
| 120 | } |
| 121 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 122 | static int netvsc_close(struct net_device *net) |
| 123 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 124 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 125 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 126 | int ret; |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 127 | u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20; |
| 128 | struct vmbus_channel *chn; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 129 | |
Haiyang Zhang | 0a28253 | 2012-02-02 07:17:59 +0000 | [diff] [blame] | 130 | netif_tx_disable(net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 131 | |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 132 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
| 133 | cancel_work_sync(&net_device_ctx->work); |
Vitaly Kuznetsov | 2f5fa6c | 2016-06-03 17:51:00 +0200 | [diff] [blame] | 134 | ret = rndis_filter_close(nvdev); |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 135 | if (ret != 0) { |
Hank Janssen | eb335bc | 2011-03-29 13:58:48 -0700 | [diff] [blame] | 136 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 137 | return ret; |
| 138 | } |
| 139 | |
| 140 | /* Ensure pending bytes in ring are read */ |
| 141 | while (true) { |
| 142 | aread = 0; |
| 143 | for (i = 0; i < nvdev->num_chn; i++) { |
| 144 | chn = nvdev->chn_table[i]; |
| 145 | if (!chn) |
| 146 | continue; |
| 147 | |
| 148 | hv_get_ringbuffer_availbytes(&chn->inbound, &aread, |
| 149 | &awrite); |
| 150 | |
| 151 | if (aread) |
| 152 | break; |
| 153 | |
| 154 | hv_get_ringbuffer_availbytes(&chn->outbound, &aread, |
| 155 | &awrite); |
| 156 | |
| 157 | if (aread) |
| 158 | break; |
| 159 | } |
| 160 | |
| 161 | retry++; |
| 162 | if (retry > retry_max || aread == 0) |
| 163 | break; |
| 164 | |
| 165 | msleep(msec); |
| 166 | |
| 167 | if (msec < 1000) |
| 168 | msec *= 2; |
| 169 | } |
| 170 | |
| 171 | if (aread) { |
| 172 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); |
| 173 | ret = -ETIMEDOUT; |
| 174 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 175 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 176 | return ret; |
| 177 | } |
| 178 | |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 179 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
| 180 | int pkt_type) |
| 181 | { |
| 182 | struct rndis_packet *rndis_pkt; |
| 183 | struct rndis_per_packet_info *ppi; |
| 184 | |
| 185 | rndis_pkt = &msg->msg.pkt; |
| 186 | rndis_pkt->data_offset += ppi_size; |
| 187 | |
| 188 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + |
| 189 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); |
| 190 | |
| 191 | ppi->size = ppi_size; |
| 192 | ppi->type = pkt_type; |
| 193 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); |
| 194 | |
| 195 | rndis_pkt->per_pkt_info_len += ppi_size; |
| 196 | |
| 197 | return ppi; |
| 198 | } |
| 199 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 200 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
| 201 | void *accel_priv, select_queue_fallback_t fallback) |
| 202 | { |
| 203 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 204 | struct netvsc_device *nvsc_dev = net_device_ctx->nvdev; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 205 | u32 hash; |
| 206 | u16 q_idx = 0; |
| 207 | |
| 208 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) |
| 209 | return 0; |
| 210 | |
Vitaly Kuznetsov | 757647e | 2016-01-25 16:00:41 +0100 | [diff] [blame] | 211 | hash = skb_get_hash(skb); |
| 212 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % |
| 213 | ndev->real_num_tx_queues; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 214 | |
Vitaly Kuznetsov | 8b9fbe1 | 2015-12-01 16:43:11 -0800 | [diff] [blame] | 215 | if (!nvsc_dev->chn_table[q_idx]) |
| 216 | q_idx = 0; |
| 217 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 218 | return q_idx; |
| 219 | } |
| 220 | |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 221 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
| 222 | struct hv_page_buffer *pb) |
| 223 | { |
| 224 | int j = 0; |
| 225 | |
| 226 | /* Deal with compund pages by ignoring unused part |
| 227 | * of the page. |
| 228 | */ |
| 229 | page += (offset >> PAGE_SHIFT); |
| 230 | offset &= ~PAGE_MASK; |
| 231 | |
| 232 | while (len > 0) { |
| 233 | unsigned long bytes; |
| 234 | |
| 235 | bytes = PAGE_SIZE - offset; |
| 236 | if (bytes > len) |
| 237 | bytes = len; |
| 238 | pb[j].pfn = page_to_pfn(page); |
| 239 | pb[j].offset = offset; |
| 240 | pb[j].len = bytes; |
| 241 | |
| 242 | offset += bytes; |
| 243 | len -= bytes; |
| 244 | |
| 245 | if (offset == PAGE_SIZE && len) { |
| 246 | page++; |
| 247 | offset = 0; |
| 248 | j++; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | return j + 1; |
| 253 | } |
| 254 | |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 255 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 256 | struct hv_netvsc_packet *packet, |
| 257 | struct hv_page_buffer **page_buf) |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 258 | { |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 259 | struct hv_page_buffer *pb = *page_buf; |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 260 | u32 slots_used = 0; |
| 261 | char *data = skb->data; |
| 262 | int frags = skb_shinfo(skb)->nr_frags; |
| 263 | int i; |
| 264 | |
| 265 | /* The packet is laid out thus: |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 266 | * 1. hdr: RNDIS header and PPI |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 267 | * 2. skb linear data |
| 268 | * 3. skb fragment data |
| 269 | */ |
| 270 | if (hdr != NULL) |
| 271 | slots_used += fill_pg_buf(virt_to_page(hdr), |
| 272 | offset_in_page(hdr), |
| 273 | len, &pb[slots_used]); |
| 274 | |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 275 | packet->rmsg_size = len; |
| 276 | packet->rmsg_pgcnt = slots_used; |
| 277 | |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 278 | slots_used += fill_pg_buf(virt_to_page(data), |
| 279 | offset_in_page(data), |
| 280 | skb_headlen(skb), &pb[slots_used]); |
| 281 | |
| 282 | for (i = 0; i < frags; i++) { |
| 283 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; |
| 284 | |
| 285 | slots_used += fill_pg_buf(skb_frag_page(frag), |
| 286 | frag->page_offset, |
| 287 | skb_frag_size(frag), &pb[slots_used]); |
| 288 | } |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 289 | return slots_used; |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | static int count_skb_frag_slots(struct sk_buff *skb) |
| 293 | { |
| 294 | int i, frags = skb_shinfo(skb)->nr_frags; |
| 295 | int pages = 0; |
| 296 | |
| 297 | for (i = 0; i < frags; i++) { |
| 298 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; |
| 299 | unsigned long size = skb_frag_size(frag); |
| 300 | unsigned long offset = frag->page_offset; |
| 301 | |
| 302 | /* Skip unused frames from start of page */ |
| 303 | offset &= ~PAGE_MASK; |
| 304 | pages += PFN_UP(offset + size); |
| 305 | } |
| 306 | return pages; |
| 307 | } |
| 308 | |
| 309 | static int netvsc_get_slots(struct sk_buff *skb) |
| 310 | { |
| 311 | char *data = skb->data; |
| 312 | unsigned int offset = offset_in_page(data); |
| 313 | unsigned int len = skb_headlen(skb); |
| 314 | int slots; |
| 315 | int frag_slots; |
| 316 | |
| 317 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); |
| 318 | frag_slots = count_skb_frag_slots(skb); |
| 319 | return slots + frag_slots; |
| 320 | } |
| 321 | |
KY Srinivasan | 08cd04b | 2014-03-08 19:23:17 -0800 | [diff] [blame] | 322 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
| 323 | { |
| 324 | u32 ret_val = TRANSPORT_INFO_NOT_IP; |
| 325 | |
| 326 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && |
| 327 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { |
| 328 | goto not_ip; |
| 329 | } |
| 330 | |
| 331 | *trans_off = skb_transport_offset(skb); |
| 332 | |
| 333 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { |
| 334 | struct iphdr *iphdr = ip_hdr(skb); |
| 335 | |
| 336 | if (iphdr->protocol == IPPROTO_TCP) |
| 337 | ret_val = TRANSPORT_INFO_IPV4_TCP; |
| 338 | else if (iphdr->protocol == IPPROTO_UDP) |
| 339 | ret_val = TRANSPORT_INFO_IPV4_UDP; |
| 340 | } else { |
| 341 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
| 342 | ret_val = TRANSPORT_INFO_IPV6_TCP; |
| 343 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) |
| 344 | ret_val = TRANSPORT_INFO_IPV6_UDP; |
| 345 | } |
| 346 | |
| 347 | not_ip: |
| 348 | return ret_val; |
| 349 | } |
| 350 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 351 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 352 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 353 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Vitaly Kuznetsov | 981a1bd | 2015-04-08 17:54:05 +0200 | [diff] [blame] | 354 | struct hv_netvsc_packet *packet = NULL; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 355 | int ret; |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 356 | unsigned int num_data_pgs; |
| 357 | struct rndis_message *rndis_msg; |
| 358 | struct rndis_packet *rndis_pkt; |
| 359 | u32 rndis_msg_size; |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 360 | struct rndis_per_packet_info *ppi; |
KY Srinivasan | 08cd04b | 2014-03-08 19:23:17 -0800 | [diff] [blame] | 361 | struct ndis_tcp_ip_checksum_info *csum_info; |
| 362 | int hdr_offset; |
| 363 | u32 net_trans_info; |
Haiyang Zhang | 307f099 | 2014-05-21 12:55:39 -0700 | [diff] [blame] | 364 | u32 hash; |
Vitaly Kuznetsov | e88f7e0 | 2015-04-08 17:54:06 +0200 | [diff] [blame] | 365 | u32 skb_length; |
KY Srinivasan | b08cc79 | 2015-03-29 21:08:42 -0700 | [diff] [blame] | 366 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 367 | struct hv_page_buffer *pb = page_buf; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 368 | |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 369 | /* We will atmost need two pages to describe the rndis |
| 370 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number |
Vitaly Kuznetsov | e88f7e0 | 2015-04-08 17:54:06 +0200 | [diff] [blame] | 371 | * of pages in a single packet. If skb is scattered around |
| 372 | * more pages we try linearizing it. |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 373 | */ |
Vitaly Kuznetsov | e88f7e0 | 2015-04-08 17:54:06 +0200 | [diff] [blame] | 374 | |
Vitaly Kuznetsov | e88f7e0 | 2015-04-08 17:54:06 +0200 | [diff] [blame] | 375 | skb_length = skb->len; |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 376 | num_data_pgs = netvsc_get_slots(skb) + 2; |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 377 | |
| 378 | if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) { |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 379 | ++net_device_ctx->eth_stats.tx_scattered; |
| 380 | |
| 381 | if (skb_linearize(skb)) |
| 382 | goto no_memory; |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 383 | |
| 384 | num_data_pgs = netvsc_get_slots(skb) + 2; |
| 385 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 386 | ++net_device_ctx->eth_stats.tx_too_big; |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 387 | goto drop; |
| 388 | } |
KY Srinivasan | 54a7357 | 2014-03-08 19:23:13 -0800 | [diff] [blame] | 389 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 390 | |
KY Srinivasan | c0eb454 | 2015-12-01 16:43:10 -0800 | [diff] [blame] | 391 | /* |
| 392 | * Place the rndis header in the skb head room and |
| 393 | * the skb->cb will be used for hv_netvsc_packet |
| 394 | * structure. |
| 395 | */ |
| 396 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 397 | if (ret) |
| 398 | goto no_memory; |
| 399 | |
KY Srinivasan | c0eb454 | 2015-12-01 16:43:10 -0800 | [diff] [blame] | 400 | /* Use the skb control buffer for building up the packet */ |
| 401 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > |
| 402 | FIELD_SIZEOF(struct sk_buff, cb)); |
| 403 | packet = (struct hv_netvsc_packet *)skb->cb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 404 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 405 | packet->q_idx = skb_get_queue_mapping(skb); |
| 406 | |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 407 | packet->total_data_buflen = skb->len; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 408 | |
KY Srinivasan | c0eb454 | 2015-12-01 16:43:10 -0800 | [diff] [blame] | 409 | rndis_msg = (struct rndis_message *)skb->head; |
KY Srinivasan | b08cc79 | 2015-03-29 21:08:42 -0700 | [diff] [blame] | 410 | |
KY Srinivasan | 2447676 | 2015-12-01 16:43:06 -0800 | [diff] [blame] | 411 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 412 | |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 413 | /* Add the rndis header */ |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 414 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
| 415 | rndis_msg->msg_len = packet->total_data_buflen; |
| 416 | rndis_pkt = &rndis_msg->msg.pkt; |
| 417 | rndis_pkt->data_offset = sizeof(struct rndis_packet); |
| 418 | rndis_pkt->data_len = packet->total_data_buflen; |
| 419 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); |
| 420 | |
| 421 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); |
| 422 | |
Haiyang Zhang | 307f099 | 2014-05-21 12:55:39 -0700 | [diff] [blame] | 423 | hash = skb_get_hash_raw(skb); |
| 424 | if (hash != 0 && net->real_num_tx_queues > 1) { |
| 425 | rndis_msg_size += NDIS_HASH_PPI_SIZE; |
| 426 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, |
| 427 | NBL_HASH_VALUE); |
| 428 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; |
| 429 | } |
| 430 | |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 431 | if (skb_vlan_tag_present(skb)) { |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 432 | struct ndis_pkt_8021q_info *vlan; |
| 433 | |
| 434 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; |
| 435 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, |
| 436 | IEEE_8021Q_INFO); |
| 437 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + |
| 438 | ppi->ppi_offset); |
KY Srinivasan | 760d1e3 | 2015-12-01 16:43:19 -0800 | [diff] [blame] | 439 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
| 440 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 441 | VLAN_PRIO_SHIFT; |
| 442 | } |
| 443 | |
KY Srinivasan | 08cd04b | 2014-03-08 19:23:17 -0800 | [diff] [blame] | 444 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
| 445 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) |
| 446 | goto do_send; |
| 447 | |
| 448 | /* |
| 449 | * Setup the sendside checksum offload only if this is not a |
| 450 | * GSO packet. |
| 451 | */ |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 452 | if (skb_is_gso(skb)) { |
| 453 | struct ndis_tcp_lso_info *lso_info; |
| 454 | |
| 455 | rndis_msg_size += NDIS_LSO_PPI_SIZE; |
| 456 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, |
| 457 | TCP_LARGESEND_PKTINFO); |
| 458 | |
| 459 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + |
| 460 | ppi->ppi_offset); |
| 461 | |
| 462 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; |
| 463 | if (net_trans_info & (INFO_IPV4 << 16)) { |
| 464 | lso_info->lso_v2_transmit.ip_version = |
| 465 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; |
| 466 | ip_hdr(skb)->tot_len = 0; |
| 467 | ip_hdr(skb)->check = 0; |
| 468 | tcp_hdr(skb)->check = |
| 469 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, |
| 470 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); |
| 471 | } else { |
| 472 | lso_info->lso_v2_transmit.ip_version = |
| 473 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; |
| 474 | ipv6_hdr(skb)->payload_len = 0; |
| 475 | tcp_hdr(skb)->check = |
| 476 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| 477 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); |
| 478 | } |
| 479 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; |
| 480 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; |
| 481 | goto do_send; |
| 482 | } |
KY Srinivasan | 08cd04b | 2014-03-08 19:23:17 -0800 | [diff] [blame] | 483 | |
KY Srinivasan | 22041fb | 2014-04-30 11:58:25 -0700 | [diff] [blame] | 484 | if ((skb->ip_summed == CHECKSUM_NONE) || |
| 485 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) |
| 486 | goto do_send; |
| 487 | |
KY Srinivasan | 08cd04b | 2014-03-08 19:23:17 -0800 | [diff] [blame] | 488 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
| 489 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, |
| 490 | TCPIP_CHKSUM_PKTINFO); |
| 491 | |
| 492 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + |
| 493 | ppi->ppi_offset); |
| 494 | |
| 495 | if (net_trans_info & (INFO_IPV4 << 16)) |
| 496 | csum_info->transmit.is_ipv4 = 1; |
| 497 | else |
| 498 | csum_info->transmit.is_ipv6 = 1; |
| 499 | |
| 500 | if (net_trans_info & INFO_TCP) { |
| 501 | csum_info->transmit.tcp_checksum = 1; |
| 502 | csum_info->transmit.tcp_header_offset = hdr_offset; |
| 503 | } else if (net_trans_info & INFO_UDP) { |
KY Srinivasan | af9893a | 2014-04-09 15:00:47 -0700 | [diff] [blame] | 504 | /* UDP checksum offload is not supported on ws2008r2. |
| 505 | * Furthermore, on ws2012 and ws2012r2, there are some |
| 506 | * issues with udp checksum offload from Linux guests. |
| 507 | * (these are host issues). |
| 508 | * For now compute the checksum here. |
| 509 | */ |
| 510 | struct udphdr *uh; |
| 511 | u16 udp_len; |
| 512 | |
| 513 | ret = skb_cow_head(skb, 0); |
| 514 | if (ret) |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 515 | goto no_memory; |
KY Srinivasan | af9893a | 2014-04-09 15:00:47 -0700 | [diff] [blame] | 516 | |
| 517 | uh = udp_hdr(skb); |
| 518 | udp_len = ntohs(uh->len); |
| 519 | uh->check = 0; |
| 520 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, |
| 521 | ip_hdr(skb)->daddr, |
| 522 | udp_len, IPPROTO_UDP, |
| 523 | csum_partial(uh, udp_len, 0)); |
| 524 | if (uh->check == 0) |
| 525 | uh->check = CSUM_MANGLED_0; |
| 526 | |
| 527 | csum_info->transmit.udp_checksum = 0; |
KY Srinivasan | 08cd04b | 2014-03-08 19:23:17 -0800 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | do_send: |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 531 | /* Start filling in the page buffers with the rndis hdr */ |
| 532 | rndis_msg->msg_len += rndis_msg_size; |
Haiyang Zhang | 942396b | 2014-10-22 13:47:18 -0700 | [diff] [blame] | 533 | packet->total_data_buflen = rndis_msg->msg_len; |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 534 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 535 | skb, packet, &pb); |
KY Srinivasan | 8a00251 | 2014-03-08 19:23:14 -0800 | [diff] [blame] | 536 | |
sixiao@microsoft.com | 76d13b5 | 2016-02-17 16:43:59 -0800 | [diff] [blame] | 537 | /* timestamp packet in software */ |
| 538 | skb_tx_timestamp(skb); |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 539 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
| 540 | rndis_msg, &pb, skb); |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 541 | if (likely(ret == 0)) { |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 542 | struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats); |
| 543 | |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 544 | u64_stats_update_begin(&tx_stats->syncp); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 545 | tx_stats->packets++; |
| 546 | tx_stats->bytes += skb_length; |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 547 | u64_stats_update_end(&tx_stats->syncp); |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 548 | return NETDEV_TX_OK; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 549 | } |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 550 | |
| 551 | if (ret == -EAGAIN) { |
| 552 | ++net_device_ctx->eth_stats.tx_busy; |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 553 | return NETDEV_TX_BUSY; |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 554 | } |
| 555 | |
| 556 | if (ret == -ENOSPC) |
| 557 | ++net_device_ctx->eth_stats.tx_no_space; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 558 | |
Stephen Hemminger | 0ab0514 | 2016-08-23 12:17:52 -0700 | [diff] [blame] | 559 | drop: |
| 560 | dev_kfree_skb_any(skb); |
| 561 | net->stats.tx_dropped++; |
| 562 | |
| 563 | return NETDEV_TX_OK; |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 564 | |
| 565 | no_memory: |
| 566 | ++net_device_ctx->eth_stats.tx_no_memory; |
| 567 | goto drop; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 568 | } |
| 569 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 570 | /* |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 571 | * netvsc_linkstatus_callback - Link up/down notification |
| 572 | */ |
K. Y. Srinivasan | 90ef117 | 2011-05-12 19:34:50 -0700 | [diff] [blame] | 573 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
Haiyang Zhang | 3a494e7 | 2014-06-19 18:34:36 -0700 | [diff] [blame] | 574 | struct rndis_message *resp) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 575 | { |
Haiyang Zhang | 3a494e7 | 2014-06-19 18:34:36 -0700 | [diff] [blame] | 576 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 577 | struct net_device *net; |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 578 | struct net_device_context *ndev_ctx; |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 579 | struct netvsc_reconfig *event; |
| 580 | unsigned long flags; |
| 581 | |
Haiyang Zhang | 7f5d5af | 2016-08-04 10:42:15 -0700 | [diff] [blame] | 582 | net = hv_get_drvdata(device_obj); |
| 583 | |
| 584 | if (!net) |
| 585 | return; |
| 586 | |
| 587 | ndev_ctx = netdev_priv(net); |
| 588 | |
| 589 | /* Update the physical link speed when changing to another vSwitch */ |
| 590 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { |
| 591 | u32 speed; |
| 592 | |
| 593 | speed = *(u32 *)((void *)indicate + indicate-> |
| 594 | status_buf_offset) / 10000; |
| 595 | ndev_ctx->speed = speed; |
| 596 | return; |
| 597 | } |
| 598 | |
| 599 | /* Handle these link change statuses below */ |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 600 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
| 601 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && |
| 602 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) |
| 603 | return; |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 604 | |
Haiyang Zhang | 7f5d5af | 2016-08-04 10:42:15 -0700 | [diff] [blame] | 605 | if (net->reg_state != NETREG_REGISTERED) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 606 | return; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 607 | |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 608 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
| 609 | if (!event) |
| 610 | return; |
| 611 | event->event = indicate->status; |
| 612 | |
| 613 | spin_lock_irqsave(&ndev_ctx->lock, flags); |
| 614 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); |
| 615 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
| 616 | |
| 617 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 618 | } |
| 619 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 620 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
KY Srinivasan | e3d605e | 2014-03-08 19:23:16 -0800 | [diff] [blame] | 621 | struct hv_netvsc_packet *packet, |
KY Srinivasan | 25b85ee | 2015-12-01 16:43:05 -0800 | [diff] [blame] | 622 | struct ndis_tcp_ip_checksum_info *csum_info, |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 623 | void *data, u16 vlan_tci) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 624 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 625 | struct sk_buff *skb; |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 626 | |
Haiyang Zhang | 72a2f5b | 2010-12-10 12:03:58 -0800 | [diff] [blame] | 627 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 628 | if (!skb) |
| 629 | return skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 630 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 631 | /* |
| 632 | * Copy to skb. This copy is needed here since the memory pointed by |
| 633 | * hv_netvsc_packet cannot be deallocated |
| 634 | */ |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 635 | memcpy(skb_put(skb, packet->total_data_buflen), data, |
| 636 | packet->total_data_buflen); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 637 | |
| 638 | skb->protocol = eth_type_trans(skb, net); |
KY Srinivasan | e3d605e | 2014-03-08 19:23:16 -0800 | [diff] [blame] | 639 | if (csum_info) { |
| 640 | /* We only look at the IP checksum here. |
| 641 | * Should we be dropping the packet if checksum |
| 642 | * failed? How do we deal with other checksums - TCP/UDP? |
| 643 | */ |
| 644 | if (csum_info->receive.ip_checksum_succeeded) |
| 645 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 646 | else |
| 647 | skb->ip_summed = CHECKSUM_NONE; |
| 648 | } |
| 649 | |
KY Srinivasan | 760d1e3 | 2015-12-01 16:43:19 -0800 | [diff] [blame] | 650 | if (vlan_tci & VLAN_TAG_PRESENT) |
Haiyang Zhang | 93725cb | 2013-06-17 15:36:49 -0700 | [diff] [blame] | 651 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
KY Srinivasan | 760d1e3 | 2015-12-01 16:43:19 -0800 | [diff] [blame] | 652 | vlan_tci); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 653 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 654 | return skb; |
| 655 | } |
| 656 | |
| 657 | /* |
| 658 | * netvsc_recv_callback - Callback when we receive a packet from the |
| 659 | * "wire" on the specified device. |
| 660 | */ |
| 661 | int netvsc_recv_callback(struct hv_device *device_obj, |
| 662 | struct hv_netvsc_packet *packet, |
| 663 | void **data, |
| 664 | struct ndis_tcp_ip_checksum_info *csum_info, |
| 665 | struct vmbus_channel *channel, |
| 666 | u16 vlan_tci) |
| 667 | { |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 668 | struct net_device *net = hv_get_drvdata(device_obj); |
| 669 | struct net_device_context *net_device_ctx = netdev_priv(net); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 670 | struct sk_buff *skb; |
| 671 | struct sk_buff *vf_skb; |
| 672 | struct netvsc_stats *rx_stats; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 673 | u32 bytes_recvd = packet->total_data_buflen; |
| 674 | int ret = 0; |
| 675 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 676 | if (!net || net->reg_state != NETREG_REGISTERED) |
| 677 | return NVSP_STAT_FAIL; |
| 678 | |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 679 | if (READ_ONCE(net_device_ctx->vf_inject)) { |
| 680 | atomic_inc(&net_device_ctx->vf_use_cnt); |
| 681 | if (!READ_ONCE(net_device_ctx->vf_inject)) { |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 682 | /* |
| 683 | * We raced; just move on. |
| 684 | */ |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 685 | atomic_dec(&net_device_ctx->vf_use_cnt); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 686 | goto vf_injection_done; |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Inject this packet into the VF inerface. |
| 691 | * On Hyper-V, multicast and brodcast packets |
| 692 | * are only delivered on the synthetic interface |
| 693 | * (after subjecting these to policy filters on |
| 694 | * the host). Deliver these via the VF interface |
| 695 | * in the guest. |
| 696 | */ |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 697 | vf_skb = netvsc_alloc_recv_skb(net_device_ctx->vf_netdev, |
| 698 | packet, csum_info, *data, |
| 699 | vlan_tci); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 700 | if (vf_skb != NULL) { |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 701 | ++net_device_ctx->vf_netdev->stats.rx_packets; |
| 702 | net_device_ctx->vf_netdev->stats.rx_bytes += |
| 703 | bytes_recvd; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 704 | netif_receive_skb(vf_skb); |
| 705 | } else { |
| 706 | ++net->stats.rx_dropped; |
| 707 | ret = NVSP_STAT_FAIL; |
| 708 | } |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 709 | atomic_dec(&net_device_ctx->vf_use_cnt); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 710 | return ret; |
| 711 | } |
| 712 | |
| 713 | vf_injection_done: |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 714 | rx_stats = this_cpu_ptr(net_device_ctx->rx_stats); |
| 715 | |
| 716 | /* Allocate a skb - TODO direct I/O to pages? */ |
| 717 | skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci); |
| 718 | if (unlikely(!skb)) { |
| 719 | ++net->stats.rx_dropped; |
| 720 | return NVSP_STAT_FAIL; |
| 721 | } |
KY Srinivasan | 25b85ee | 2015-12-01 16:43:05 -0800 | [diff] [blame] | 722 | skb_record_rx_queue(skb, channel-> |
Haiyang Zhang | e565e80 | 2014-05-08 15:14:10 -0700 | [diff] [blame] | 723 | offermsg.offer.sub_channel_index); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 724 | |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 725 | u64_stats_update_begin(&rx_stats->syncp); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 726 | rx_stats->packets++; |
| 727 | rx_stats->bytes += packet->total_data_buflen; |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 728 | u64_stats_update_end(&rx_stats->syncp); |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 729 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 730 | /* |
| 731 | * Pass the skb back up. Network stack will deallocate the skb when it |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 732 | * is done. |
| 733 | * TODO - use NAPI? |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 734 | */ |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 735 | netif_rx(skb); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 736 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 737 | return 0; |
| 738 | } |
| 739 | |
Stephen Hemminger | f82f4ad | 2010-05-04 09:58:57 -0700 | [diff] [blame] | 740 | static void netvsc_get_drvinfo(struct net_device *net, |
| 741 | struct ethtool_drvinfo *info) |
| 742 | { |
Stephen Hemminger | e3f74b8 | 2016-08-23 12:17:56 -0700 | [diff] [blame] | 743 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 744 | struct hv_device *dev = net_device_ctx->device_ctx; |
| 745 | |
Jiri Pirko | 7826d43 | 2013-01-06 00:44:26 +0000 | [diff] [blame] | 746 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
Jiri Pirko | 7826d43 | 2013-01-06 00:44:26 +0000 | [diff] [blame] | 747 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
Stephen Hemminger | e3f74b8 | 2016-08-23 12:17:56 -0700 | [diff] [blame] | 748 | strlcpy(info->bus_info, vmbus_dev_name(dev), sizeof(info->bus_info)); |
Stephen Hemminger | f82f4ad | 2010-05-04 09:58:57 -0700 | [diff] [blame] | 749 | } |
| 750 | |
Andrew Schwartzmeyer | 5999537 | 2015-02-26 16:27:14 -0800 | [diff] [blame] | 751 | static void netvsc_get_channels(struct net_device *net, |
| 752 | struct ethtool_channels *channel) |
| 753 | { |
| 754 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 755 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
Andrew Schwartzmeyer | 5999537 | 2015-02-26 16:27:14 -0800 | [diff] [blame] | 756 | |
| 757 | if (nvdev) { |
| 758 | channel->max_combined = nvdev->max_chn; |
| 759 | channel->combined_count = nvdev->num_chn; |
| 760 | } |
| 761 | } |
| 762 | |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 763 | static int netvsc_set_channels(struct net_device *net, |
| 764 | struct ethtool_channels *channels) |
| 765 | { |
| 766 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 767 | struct hv_device *dev = net_device_ctx->device_ctx; |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 768 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 769 | struct netvsc_device_info device_info; |
Andrew Schwartzmeyer | 954591b | 2015-08-18 20:06:32 -0700 | [diff] [blame] | 770 | u32 num_chn; |
| 771 | u32 max_chn; |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 772 | int ret = 0; |
| 773 | bool recovering = false; |
| 774 | |
Vitaly Kuznetsov | 6da7225 | 2016-05-13 13:55:24 +0200 | [diff] [blame] | 775 | if (net_device_ctx->start_remove || !nvdev || nvdev->destroy) |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 776 | return -ENODEV; |
| 777 | |
Andrew Schwartzmeyer | 954591b | 2015-08-18 20:06:32 -0700 | [diff] [blame] | 778 | num_chn = nvdev->num_chn; |
| 779 | max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); |
| 780 | |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 781 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { |
| 782 | pr_info("vRSS unsupported before NVSP Version 5\n"); |
| 783 | return -EINVAL; |
| 784 | } |
| 785 | |
| 786 | /* We do not support rx, tx, or other */ |
| 787 | if (!channels || |
| 788 | channels->rx_count || |
| 789 | channels->tx_count || |
| 790 | channels->other_count || |
| 791 | (channels->combined_count < 1)) |
| 792 | return -EINVAL; |
| 793 | |
| 794 | if (channels->combined_count > max_chn) { |
| 795 | pr_info("combined channels too high, using %d\n", max_chn); |
| 796 | channels->combined_count = max_chn; |
| 797 | } |
| 798 | |
| 799 | ret = netvsc_close(net); |
| 800 | if (ret) |
| 801 | goto out; |
| 802 | |
| 803 | do_set: |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 804 | net_device_ctx->start_remove = true; |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 805 | rndis_filter_device_remove(dev); |
| 806 | |
| 807 | nvdev->num_chn = channels->combined_count; |
| 808 | |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 809 | memset(&device_info, 0, sizeof(device_info)); |
| 810 | device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ |
| 811 | device_info.ring_size = ring_size; |
| 812 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
| 813 | |
| 814 | ret = rndis_filter_device_add(dev, &device_info); |
| 815 | if (ret) { |
| 816 | if (recovering) { |
| 817 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); |
| 818 | return ret; |
| 819 | } |
| 820 | goto recover; |
| 821 | } |
| 822 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 823 | nvdev = net_device_ctx->nvdev; |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 824 | |
| 825 | ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); |
| 826 | if (ret) { |
| 827 | if (recovering) { |
| 828 | netdev_err(net, "could not set tx queue count (ret %d)\n", ret); |
| 829 | return ret; |
| 830 | } |
| 831 | goto recover; |
| 832 | } |
| 833 | |
| 834 | ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); |
| 835 | if (ret) { |
| 836 | if (recovering) { |
| 837 | netdev_err(net, "could not set rx queue count (ret %d)\n", ret); |
| 838 | return ret; |
| 839 | } |
| 840 | goto recover; |
| 841 | } |
| 842 | |
| 843 | out: |
| 844 | netvsc_open(net); |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 845 | net_device_ctx->start_remove = false; |
Vitaly Kuznetsov | 1bdcec8 | 2016-05-13 13:55:21 +0200 | [diff] [blame] | 846 | /* We may have missed link change notifications */ |
| 847 | schedule_delayed_work(&net_device_ctx->dwork, 0); |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 848 | |
| 849 | return ret; |
| 850 | |
| 851 | recover: |
| 852 | /* If the above failed, we attempt to recover through the same |
| 853 | * process but with the original number of channels. |
| 854 | */ |
| 855 | netdev_err(net, "could not set channels, recovering\n"); |
| 856 | recovering = true; |
| 857 | channels->combined_count = num_chn; |
| 858 | goto do_set; |
| 859 | } |
| 860 | |
sixiao@microsoft.com | 49eb938 | 2016-02-25 15:24:08 -0800 | [diff] [blame] | 861 | static bool netvsc_validate_ethtool_ss_cmd(const struct ethtool_cmd *cmd) |
| 862 | { |
| 863 | struct ethtool_cmd diff1 = *cmd; |
| 864 | struct ethtool_cmd diff2 = {}; |
| 865 | |
| 866 | ethtool_cmd_speed_set(&diff1, 0); |
| 867 | diff1.duplex = 0; |
| 868 | /* advertising and cmd are usually set */ |
| 869 | diff1.advertising = 0; |
| 870 | diff1.cmd = 0; |
| 871 | /* We set port to PORT_OTHER */ |
| 872 | diff2.port = PORT_OTHER; |
| 873 | |
| 874 | return !memcmp(&diff1, &diff2, sizeof(diff1)); |
| 875 | } |
| 876 | |
| 877 | static void netvsc_init_settings(struct net_device *dev) |
| 878 | { |
| 879 | struct net_device_context *ndc = netdev_priv(dev); |
| 880 | |
| 881 | ndc->speed = SPEED_UNKNOWN; |
| 882 | ndc->duplex = DUPLEX_UNKNOWN; |
| 883 | } |
| 884 | |
| 885 | static int netvsc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 886 | { |
| 887 | struct net_device_context *ndc = netdev_priv(dev); |
| 888 | |
| 889 | ethtool_cmd_speed_set(cmd, ndc->speed); |
| 890 | cmd->duplex = ndc->duplex; |
| 891 | cmd->port = PORT_OTHER; |
| 892 | |
| 893 | return 0; |
| 894 | } |
| 895 | |
| 896 | static int netvsc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 897 | { |
| 898 | struct net_device_context *ndc = netdev_priv(dev); |
| 899 | u32 speed; |
| 900 | |
| 901 | speed = ethtool_cmd_speed(cmd); |
| 902 | if (!ethtool_validate_speed(speed) || |
| 903 | !ethtool_validate_duplex(cmd->duplex) || |
| 904 | !netvsc_validate_ethtool_ss_cmd(cmd)) |
| 905 | return -EINVAL; |
| 906 | |
| 907 | ndc->speed = speed; |
| 908 | ndc->duplex = cmd->duplex; |
| 909 | |
| 910 | return 0; |
| 911 | } |
| 912 | |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 913 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
| 914 | { |
| 915 | struct net_device_context *ndevctx = netdev_priv(ndev); |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 916 | struct netvsc_device *nvdev = ndevctx->nvdev; |
| 917 | struct hv_device *hdev = ndevctx->device_ctx; |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 918 | struct netvsc_device_info device_info; |
| 919 | int limit = ETH_DATA_LEN; |
Haiyang Zhang | d212b46 | 2016-03-23 09:43:09 -0700 | [diff] [blame] | 920 | u32 num_chn; |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 921 | int ret = 0; |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 922 | |
Vitaly Kuznetsov | 6da7225 | 2016-05-13 13:55:24 +0200 | [diff] [blame] | 923 | if (ndevctx->start_remove || !nvdev || nvdev->destroy) |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 924 | return -ENODEV; |
| 925 | |
Haiyang Zhang | a1eabb0 | 2014-02-19 15:49:45 -0800 | [diff] [blame] | 926 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
Haiyang Zhang | 4d3c9d3 | 2014-11-12 14:07:44 -0800 | [diff] [blame] | 927 | limit = NETVSC_MTU - ETH_HLEN; |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 928 | |
Haiyang Zhang | f9cbce3 | 2015-07-06 14:11:37 -0700 | [diff] [blame] | 929 | if (mtu < NETVSC_MTU_MIN || mtu > limit) |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 930 | return -EINVAL; |
| 931 | |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 932 | ret = netvsc_close(ndev); |
| 933 | if (ret) |
| 934 | goto out; |
| 935 | |
Haiyang Zhang | d212b46 | 2016-03-23 09:43:09 -0700 | [diff] [blame] | 936 | num_chn = nvdev->num_chn; |
| 937 | |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 938 | ndevctx->start_remove = true; |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 939 | rndis_filter_device_remove(hdev); |
| 940 | |
| 941 | ndev->mtu = mtu; |
| 942 | |
Andrew Schwartzmeyer | 8ebdcc5 | 2015-08-11 17:14:31 -0700 | [diff] [blame] | 943 | memset(&device_info, 0, sizeof(device_info)); |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 944 | device_info.ring_size = ring_size; |
Haiyang Zhang | d212b46 | 2016-03-23 09:43:09 -0700 | [diff] [blame] | 945 | device_info.num_chn = num_chn; |
KY Srinivasan | e01ec21 | 2015-05-27 13:16:57 -0700 | [diff] [blame] | 946 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 947 | rndis_filter_device_add(hdev, &device_info); |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 948 | |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 949 | out: |
| 950 | netvsc_open(ndev); |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 951 | ndevctx->start_remove = false; |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 952 | |
Vitaly Kuznetsov | 1bdcec8 | 2016-05-13 13:55:21 +0200 | [diff] [blame] | 953 | /* We may have missed link change notifications */ |
| 954 | schedule_delayed_work(&ndevctx->dwork, 0); |
| 955 | |
Haiyang Zhang | 2de8530 | 2015-07-13 13:09:16 -0700 | [diff] [blame] | 956 | return ret; |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 957 | } |
| 958 | |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 959 | static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net, |
| 960 | struct rtnl_link_stats64 *t) |
| 961 | { |
| 962 | struct net_device_context *ndev_ctx = netdev_priv(net); |
| 963 | int cpu; |
| 964 | |
| 965 | for_each_possible_cpu(cpu) { |
| 966 | struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats, |
| 967 | cpu); |
| 968 | struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats, |
| 969 | cpu); |
| 970 | u64 tx_packets, tx_bytes, rx_packets, rx_bytes; |
| 971 | unsigned int start; |
| 972 | |
| 973 | do { |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 974 | start = u64_stats_fetch_begin_irq(&tx_stats->syncp); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 975 | tx_packets = tx_stats->packets; |
| 976 | tx_bytes = tx_stats->bytes; |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 977 | } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 978 | |
| 979 | do { |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 980 | start = u64_stats_fetch_begin_irq(&rx_stats->syncp); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 981 | rx_packets = rx_stats->packets; |
| 982 | rx_bytes = rx_stats->bytes; |
sixiao@microsoft.com | 4b02b58 | 2015-05-15 02:33:03 -0700 | [diff] [blame] | 983 | } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 984 | |
| 985 | t->tx_bytes += tx_bytes; |
| 986 | t->tx_packets += tx_packets; |
| 987 | t->rx_bytes += rx_bytes; |
| 988 | t->rx_packets += rx_packets; |
| 989 | } |
| 990 | |
| 991 | t->tx_dropped = net->stats.tx_dropped; |
| 992 | t->tx_errors = net->stats.tx_dropped; |
| 993 | |
| 994 | t->rx_dropped = net->stats.rx_dropped; |
| 995 | t->rx_errors = net->stats.rx_errors; |
| 996 | |
| 997 | return t; |
| 998 | } |
Haiyang Zhang | 1ce09e8 | 2012-07-10 07:19:22 +0000 | [diff] [blame] | 999 | |
| 1000 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) |
| 1001 | { |
Haiyang Zhang | 1ce09e8 | 2012-07-10 07:19:22 +0000 | [diff] [blame] | 1002 | struct sockaddr *addr = p; |
Jianjun Kong | 9a4c831 | 2013-01-18 16:52:09 +0000 | [diff] [blame] | 1003 | char save_adr[ETH_ALEN]; |
Haiyang Zhang | 1ce09e8 | 2012-07-10 07:19:22 +0000 | [diff] [blame] | 1004 | unsigned char save_aatype; |
| 1005 | int err; |
| 1006 | |
| 1007 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); |
| 1008 | save_aatype = ndev->addr_assign_type; |
| 1009 | |
| 1010 | err = eth_mac_addr(ndev, p); |
| 1011 | if (err != 0) |
| 1012 | return err; |
| 1013 | |
Vitaly Kuznetsov | e834da9a | 2016-06-03 17:51:01 +0200 | [diff] [blame] | 1014 | err = rndis_filter_set_device_mac(ndev, addr->sa_data); |
Haiyang Zhang | 1ce09e8 | 2012-07-10 07:19:22 +0000 | [diff] [blame] | 1015 | if (err != 0) { |
| 1016 | /* roll back to saved MAC */ |
| 1017 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); |
| 1018 | ndev->addr_assign_type = save_aatype; |
| 1019 | } |
| 1020 | |
| 1021 | return err; |
| 1022 | } |
| 1023 | |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 1024 | static const struct { |
| 1025 | char name[ETH_GSTRING_LEN]; |
| 1026 | u16 offset; |
| 1027 | } netvsc_stats[] = { |
| 1028 | { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, |
| 1029 | { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, |
| 1030 | { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, |
| 1031 | { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, |
| 1032 | { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, |
| 1033 | }; |
| 1034 | |
| 1035 | static int netvsc_get_sset_count(struct net_device *dev, int string_set) |
| 1036 | { |
| 1037 | switch (string_set) { |
| 1038 | case ETH_SS_STATS: |
| 1039 | return ARRAY_SIZE(netvsc_stats); |
| 1040 | default: |
| 1041 | return -EINVAL; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | static void netvsc_get_ethtool_stats(struct net_device *dev, |
| 1046 | struct ethtool_stats *stats, u64 *data) |
| 1047 | { |
| 1048 | struct net_device_context *ndc = netdev_priv(dev); |
| 1049 | const void *nds = &ndc->eth_stats; |
| 1050 | int i; |
| 1051 | |
| 1052 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) |
| 1053 | data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); |
| 1054 | } |
| 1055 | |
| 1056 | static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
| 1057 | { |
| 1058 | int i; |
| 1059 | |
| 1060 | switch (stringset) { |
| 1061 | case ETH_SS_STATS: |
| 1062 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) |
| 1063 | memcpy(data + i * ETH_GSTRING_LEN, |
| 1064 | netvsc_stats[i].name, ETH_GSTRING_LEN); |
| 1065 | break; |
| 1066 | } |
| 1067 | } |
| 1068 | |
Richard Weinberger | 316158f | 2014-07-09 16:23:59 +0200 | [diff] [blame] | 1069 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1070 | static void netvsc_poll_controller(struct net_device *net) |
| 1071 | { |
| 1072 | /* As netvsc_start_xmit() works synchronous we don't have to |
| 1073 | * trigger anything here. |
| 1074 | */ |
| 1075 | } |
| 1076 | #endif |
Haiyang Zhang | 1ce09e8 | 2012-07-10 07:19:22 +0000 | [diff] [blame] | 1077 | |
Stephen Hemminger | f82f4ad | 2010-05-04 09:58:57 -0700 | [diff] [blame] | 1078 | static const struct ethtool_ops ethtool_ops = { |
| 1079 | .get_drvinfo = netvsc_get_drvinfo, |
Stephen Hemminger | f82f4ad | 2010-05-04 09:58:57 -0700 | [diff] [blame] | 1080 | .get_link = ethtool_op_get_link, |
Stephen Hemminger | 4323b47 | 2016-08-23 12:17:57 -0700 | [diff] [blame^] | 1081 | .get_ethtool_stats = netvsc_get_ethtool_stats, |
| 1082 | .get_sset_count = netvsc_get_sset_count, |
| 1083 | .get_strings = netvsc_get_strings, |
Andrew Schwartzmeyer | 5999537 | 2015-02-26 16:27:14 -0800 | [diff] [blame] | 1084 | .get_channels = netvsc_get_channels, |
Andrew Schwartzmeyer | b5960e6 | 2015-08-11 17:14:32 -0700 | [diff] [blame] | 1085 | .set_channels = netvsc_set_channels, |
sixiao@microsoft.com | 76d13b5 | 2016-02-17 16:43:59 -0800 | [diff] [blame] | 1086 | .get_ts_info = ethtool_op_get_ts_info, |
sixiao@microsoft.com | 49eb938 | 2016-02-25 15:24:08 -0800 | [diff] [blame] | 1087 | .get_settings = netvsc_get_settings, |
| 1088 | .set_settings = netvsc_set_settings, |
Stephen Hemminger | f82f4ad | 2010-05-04 09:58:57 -0700 | [diff] [blame] | 1089 | }; |
| 1090 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1091 | static const struct net_device_ops device_ops = { |
| 1092 | .ndo_open = netvsc_open, |
| 1093 | .ndo_stop = netvsc_close, |
| 1094 | .ndo_start_xmit = netvsc_start_xmit, |
Jiri Pirko | afc4b13 | 2011-08-16 06:29:01 +0000 | [diff] [blame] | 1095 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
Haiyang Zhang | 4d447c9 | 2011-12-15 13:45:17 -0800 | [diff] [blame] | 1096 | .ndo_change_mtu = netvsc_change_mtu, |
Haiyang Zhang | b681b58 | 2010-08-03 19:15:31 +0000 | [diff] [blame] | 1097 | .ndo_validate_addr = eth_validate_addr, |
Haiyang Zhang | 1ce09e8 | 2012-07-10 07:19:22 +0000 | [diff] [blame] | 1098 | .ndo_set_mac_address = netvsc_set_mac_addr, |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1099 | .ndo_select_queue = netvsc_select_queue, |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 1100 | .ndo_get_stats64 = netvsc_get_stats64, |
Richard Weinberger | 316158f | 2014-07-09 16:23:59 +0200 | [diff] [blame] | 1101 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1102 | .ndo_poll_controller = netvsc_poll_controller, |
| 1103 | #endif |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1104 | }; |
| 1105 | |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 1106 | /* |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1107 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
| 1108 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is |
| 1109 | * present send GARP packet to network peers with netif_notify_peers(). |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 1110 | */ |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 1111 | static void netvsc_link_change(struct work_struct *w) |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 1112 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1113 | struct net_device_context *ndev_ctx = |
| 1114 | container_of(w, struct net_device_context, dwork.work); |
| 1115 | struct hv_device *device_obj = ndev_ctx->device_ctx; |
| 1116 | struct net_device *net = hv_get_drvdata(device_obj); |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1117 | struct netvsc_device *net_device; |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 1118 | struct rndis_device *rdev; |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1119 | struct netvsc_reconfig *event = NULL; |
| 1120 | bool notify = false, reschedule = false; |
| 1121 | unsigned long flags, next_reconfig, delay; |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 1122 | |
Vitaly Kuznetsov | 1bdcec8 | 2016-05-13 13:55:21 +0200 | [diff] [blame] | 1123 | rtnl_lock(); |
| 1124 | if (ndev_ctx->start_remove) |
| 1125 | goto out_unlock; |
| 1126 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 1127 | net_device = ndev_ctx->nvdev; |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 1128 | rdev = net_device->extension; |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 1129 | |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1130 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
| 1131 | if (time_is_after_jiffies(next_reconfig)) { |
| 1132 | /* link_watch only sends one notification with current state |
| 1133 | * per second, avoid doing reconfig more frequently. Handle |
| 1134 | * wrap around. |
| 1135 | */ |
| 1136 | delay = next_reconfig - jiffies; |
| 1137 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; |
| 1138 | schedule_delayed_work(&ndev_ctx->dwork, delay); |
Vitaly Kuznetsov | 1bdcec8 | 2016-05-13 13:55:21 +0200 | [diff] [blame] | 1139 | goto out_unlock; |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1140 | } |
| 1141 | ndev_ctx->last_reconfig = jiffies; |
| 1142 | |
| 1143 | spin_lock_irqsave(&ndev_ctx->lock, flags); |
| 1144 | if (!list_empty(&ndev_ctx->reconfig_events)) { |
| 1145 | event = list_first_entry(&ndev_ctx->reconfig_events, |
| 1146 | struct netvsc_reconfig, list); |
| 1147 | list_del(&event->list); |
| 1148 | reschedule = !list_empty(&ndev_ctx->reconfig_events); |
| 1149 | } |
| 1150 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
| 1151 | |
| 1152 | if (!event) |
Vitaly Kuznetsov | 1bdcec8 | 2016-05-13 13:55:21 +0200 | [diff] [blame] | 1153 | goto out_unlock; |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1154 | |
| 1155 | switch (event->event) { |
| 1156 | /* Only the following events are possible due to the check in |
| 1157 | * netvsc_linkstatus_callback() |
| 1158 | */ |
| 1159 | case RNDIS_STATUS_MEDIA_CONNECT: |
| 1160 | if (rdev->link_state) { |
| 1161 | rdev->link_state = false; |
| 1162 | netif_carrier_on(net); |
| 1163 | netif_tx_wake_all_queues(net); |
| 1164 | } else { |
| 1165 | notify = true; |
Haiyang Zhang | 3a494e7 | 2014-06-19 18:34:36 -0700 | [diff] [blame] | 1166 | } |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1167 | kfree(event); |
| 1168 | break; |
| 1169 | case RNDIS_STATUS_MEDIA_DISCONNECT: |
| 1170 | if (!rdev->link_state) { |
| 1171 | rdev->link_state = true; |
| 1172 | netif_carrier_off(net); |
| 1173 | netif_tx_stop_all_queues(net); |
| 1174 | } |
| 1175 | kfree(event); |
| 1176 | break; |
| 1177 | case RNDIS_STATUS_NETWORK_CHANGE: |
| 1178 | /* Only makes sense if carrier is present */ |
| 1179 | if (!rdev->link_state) { |
| 1180 | rdev->link_state = true; |
| 1181 | netif_carrier_off(net); |
| 1182 | netif_tx_stop_all_queues(net); |
| 1183 | event->event = RNDIS_STATUS_MEDIA_CONNECT; |
| 1184 | spin_lock_irqsave(&ndev_ctx->lock, flags); |
Haiyang Zhang | 15cfd40 | 2016-04-21 16:13:01 -0700 | [diff] [blame] | 1185 | list_add(&event->list, &ndev_ctx->reconfig_events); |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1186 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
| 1187 | reschedule = true; |
| 1188 | } |
| 1189 | break; |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | rtnl_unlock(); |
| 1193 | |
| 1194 | if (notify) |
| 1195 | netdev_notify_peers(net); |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1196 | |
| 1197 | /* link_watch only sends one notification with current state per |
| 1198 | * second, handle next reconfig event in 2 seconds. |
| 1199 | */ |
| 1200 | if (reschedule) |
| 1201 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); |
Vitaly Kuznetsov | 1bdcec8 | 2016-05-13 13:55:21 +0200 | [diff] [blame] | 1202 | |
| 1203 | return; |
| 1204 | |
| 1205 | out_unlock: |
| 1206 | rtnl_unlock(); |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 1207 | } |
| 1208 | |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 1209 | static void netvsc_free_netdev(struct net_device *netdev) |
| 1210 | { |
| 1211 | struct net_device_context *net_device_ctx = netdev_priv(netdev); |
| 1212 | |
| 1213 | free_percpu(net_device_ctx->tx_stats); |
| 1214 | free_percpu(net_device_ctx->rx_stats); |
| 1215 | free_netdev(netdev); |
| 1216 | } |
Haiyang Zhang | c996edc | 2011-04-06 15:18:00 -0700 | [diff] [blame] | 1217 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1218 | static struct net_device *get_netvsc_net_device(char *mac) |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1219 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1220 | struct net_device *dev, *found = NULL; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1221 | |
Stephen Hemminger | 8737caa | 2016-08-23 12:17:44 -0700 | [diff] [blame] | 1222 | ASSERT_RTNL(); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1223 | |
| 1224 | for_each_netdev(&init_net, dev) { |
| 1225 | if (memcmp(dev->dev_addr, mac, ETH_ALEN) == 0) { |
| 1226 | if (dev->netdev_ops != &device_ops) |
| 1227 | continue; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1228 | found = dev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1229 | break; |
| 1230 | } |
| 1231 | } |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1232 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1233 | return found; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1234 | } |
| 1235 | |
| 1236 | static int netvsc_register_vf(struct net_device *vf_netdev) |
| 1237 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1238 | struct net_device *ndev; |
| 1239 | struct net_device_context *net_device_ctx; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1240 | struct netvsc_device *netvsc_dev; |
| 1241 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; |
| 1242 | |
| 1243 | if (eth_ops == NULL || eth_ops == ðtool_ops) |
| 1244 | return NOTIFY_DONE; |
| 1245 | |
| 1246 | /* |
| 1247 | * We will use the MAC address to locate the synthetic interface to |
| 1248 | * associate with the VF interface. If we don't find a matching |
| 1249 | * synthetic interface, move on. |
| 1250 | */ |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1251 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
| 1252 | if (!ndev) |
| 1253 | return NOTIFY_DONE; |
| 1254 | |
| 1255 | net_device_ctx = netdev_priv(ndev); |
| 1256 | netvsc_dev = net_device_ctx->nvdev; |
Vitaly Kuznetsov | 0f20d79 | 2016-08-15 17:48:42 +0200 | [diff] [blame] | 1257 | if (!netvsc_dev || net_device_ctx->vf_netdev) |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1258 | return NOTIFY_DONE; |
| 1259 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1260 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1261 | /* |
| 1262 | * Take a reference on the module. |
| 1263 | */ |
| 1264 | try_module_get(THIS_MODULE); |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 1265 | net_device_ctx->vf_netdev = vf_netdev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1266 | return NOTIFY_OK; |
| 1267 | } |
| 1268 | |
Vitaly Kuznetsov | 57c1826b99 | 2016-08-15 17:48:41 +0200 | [diff] [blame] | 1269 | static void netvsc_inject_enable(struct net_device_context *net_device_ctx) |
| 1270 | { |
| 1271 | net_device_ctx->vf_inject = true; |
| 1272 | } |
| 1273 | |
| 1274 | static void netvsc_inject_disable(struct net_device_context *net_device_ctx) |
| 1275 | { |
| 1276 | net_device_ctx->vf_inject = false; |
| 1277 | |
| 1278 | /* Wait for currently active users to drain out. */ |
| 1279 | while (atomic_read(&net_device_ctx->vf_use_cnt) != 0) |
| 1280 | udelay(50); |
| 1281 | } |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1282 | |
| 1283 | static int netvsc_vf_up(struct net_device *vf_netdev) |
| 1284 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1285 | struct net_device *ndev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1286 | struct netvsc_device *netvsc_dev; |
| 1287 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; |
| 1288 | struct net_device_context *net_device_ctx; |
| 1289 | |
| 1290 | if (eth_ops == ðtool_ops) |
| 1291 | return NOTIFY_DONE; |
| 1292 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1293 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
| 1294 | if (!ndev) |
| 1295 | return NOTIFY_DONE; |
| 1296 | |
| 1297 | net_device_ctx = netdev_priv(ndev); |
| 1298 | netvsc_dev = net_device_ctx->nvdev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1299 | |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 1300 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1301 | return NOTIFY_DONE; |
| 1302 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1303 | netdev_info(ndev, "VF up: %s\n", vf_netdev->name); |
Vitaly Kuznetsov | 57c1826b99 | 2016-08-15 17:48:41 +0200 | [diff] [blame] | 1304 | netvsc_inject_enable(net_device_ctx); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1305 | |
| 1306 | /* |
| 1307 | * Open the device before switching data path. |
| 1308 | */ |
Vitaly Kuznetsov | 2f5fa6c | 2016-06-03 17:51:00 +0200 | [diff] [blame] | 1309 | rndis_filter_open(netvsc_dev); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1310 | |
| 1311 | /* |
| 1312 | * notify the host to switch the data path. |
| 1313 | */ |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1314 | netvsc_switch_datapath(ndev, true); |
| 1315 | netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1316 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1317 | netif_carrier_off(ndev); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1318 | |
Vitaly Kuznetsov | d072218 | 2016-08-15 17:48:40 +0200 | [diff] [blame] | 1319 | /* Now notify peers through VF device. */ |
| 1320 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, vf_netdev); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1321 | |
| 1322 | return NOTIFY_OK; |
| 1323 | } |
| 1324 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1325 | static int netvsc_vf_down(struct net_device *vf_netdev) |
| 1326 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1327 | struct net_device *ndev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1328 | struct netvsc_device *netvsc_dev; |
| 1329 | struct net_device_context *net_device_ctx; |
| 1330 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; |
| 1331 | |
| 1332 | if (eth_ops == ðtool_ops) |
| 1333 | return NOTIFY_DONE; |
| 1334 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1335 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
| 1336 | if (!ndev) |
| 1337 | return NOTIFY_DONE; |
| 1338 | |
| 1339 | net_device_ctx = netdev_priv(ndev); |
| 1340 | netvsc_dev = net_device_ctx->nvdev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1341 | |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 1342 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1343 | return NOTIFY_DONE; |
| 1344 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1345 | netdev_info(ndev, "VF down: %s\n", vf_netdev->name); |
Vitaly Kuznetsov | 57c1826b99 | 2016-08-15 17:48:41 +0200 | [diff] [blame] | 1346 | netvsc_inject_disable(net_device_ctx); |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1347 | netvsc_switch_datapath(ndev, false); |
| 1348 | netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); |
Vitaly Kuznetsov | 2f5fa6c | 2016-06-03 17:51:00 +0200 | [diff] [blame] | 1349 | rndis_filter_close(netvsc_dev); |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1350 | netif_carrier_on(ndev); |
Vitaly Kuznetsov | d072218 | 2016-08-15 17:48:40 +0200 | [diff] [blame] | 1351 | |
| 1352 | /* Now notify peers through netvsc device. */ |
| 1353 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, ndev); |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1354 | |
| 1355 | return NOTIFY_OK; |
| 1356 | } |
| 1357 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1358 | static int netvsc_unregister_vf(struct net_device *vf_netdev) |
| 1359 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1360 | struct net_device *ndev; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1361 | struct netvsc_device *netvsc_dev; |
| 1362 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1363 | struct net_device_context *net_device_ctx; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1364 | |
| 1365 | if (eth_ops == ðtool_ops) |
| 1366 | return NOTIFY_DONE; |
| 1367 | |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1368 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
| 1369 | if (!ndev) |
| 1370 | return NOTIFY_DONE; |
| 1371 | |
| 1372 | net_device_ctx = netdev_priv(ndev); |
| 1373 | netvsc_dev = net_device_ctx->nvdev; |
Vitaly Kuznetsov | 0f20d79 | 2016-08-15 17:48:42 +0200 | [diff] [blame] | 1374 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1375 | return NOTIFY_DONE; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1376 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
Vitaly Kuznetsov | 57c1826b99 | 2016-08-15 17:48:41 +0200 | [diff] [blame] | 1377 | netvsc_inject_disable(net_device_ctx); |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 1378 | net_device_ctx->vf_netdev = NULL; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1379 | module_put(THIS_MODULE); |
| 1380 | return NOTIFY_OK; |
| 1381 | } |
| 1382 | |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 1383 | static int netvsc_probe(struct hv_device *dev, |
| 1384 | const struct hv_vmbus_device_id *dev_id) |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1385 | { |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1386 | struct net_device *net = NULL; |
| 1387 | struct net_device_context *net_device_ctx; |
| 1388 | struct netvsc_device_info device_info; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1389 | struct netvsc_device *nvdev; |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1390 | int ret; |
| 1391 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1392 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
| 1393 | num_online_cpus()); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1394 | if (!net) |
K. Y. Srinivasan | 51a805d | 2011-08-25 09:49:11 -0700 | [diff] [blame] | 1395 | return -ENOMEM; |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1396 | |
Haiyang Zhang | 1b07da5 | 2014-03-04 14:11:06 -0800 | [diff] [blame] | 1397 | netif_carrier_off(net); |
| 1398 | |
Haiyang Zhang | b37879e | 2016-08-04 10:42:14 -0700 | [diff] [blame] | 1399 | netvsc_init_settings(net); |
| 1400 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1401 | net_device_ctx = netdev_priv(net); |
K. Y. Srinivasan | 9efd21e | 2011-04-29 13:45:10 -0700 | [diff] [blame] | 1402 | net_device_ctx->device_ctx = dev; |
Simon Xiao | 3f300ff | 2015-04-28 01:05:17 -0700 | [diff] [blame] | 1403 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
| 1404 | if (netif_msg_probe(net_device_ctx)) |
| 1405 | netdev_dbg(net, "netvsc msg_enable: %d\n", |
| 1406 | net_device_ctx->msg_enable); |
| 1407 | |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 1408 | net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
| 1409 | if (!net_device_ctx->tx_stats) { |
| 1410 | free_netdev(net); |
| 1411 | return -ENOMEM; |
| 1412 | } |
| 1413 | net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
| 1414 | if (!net_device_ctx->rx_stats) { |
| 1415 | free_percpu(net_device_ctx->tx_stats); |
| 1416 | free_netdev(net); |
| 1417 | return -ENOMEM; |
| 1418 | } |
| 1419 | |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1420 | hv_set_drvdata(dev, net); |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 1421 | |
| 1422 | net_device_ctx->start_remove = false; |
| 1423 | |
Haiyang Zhang | 891de74 | 2014-02-12 16:54:27 -0800 | [diff] [blame] | 1424 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 1425 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1426 | |
Vitaly Kuznetsov | 27a70af | 2015-11-27 11:39:55 +0100 | [diff] [blame] | 1427 | spin_lock_init(&net_device_ctx->lock); |
| 1428 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); |
| 1429 | |
Vitaly Kuznetsov | f9a7da9 | 2016-08-15 17:48:39 +0200 | [diff] [blame] | 1430 | atomic_set(&net_device_ctx->vf_use_cnt, 0); |
| 1431 | net_device_ctx->vf_netdev = NULL; |
| 1432 | net_device_ctx->vf_inject = false; |
| 1433 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1434 | net->netdev_ops = &device_ops; |
| 1435 | |
sixiao@microsoft.com | a060679 | 2016-02-04 15:49:34 -0800 | [diff] [blame] | 1436 | net->hw_features = NETVSC_HW_FEATURES; |
| 1437 | net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX; |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 1438 | |
Wilfried Klaebe | 7ad24ea | 2014-05-11 00:12:32 +0000 | [diff] [blame] | 1439 | net->ethtool_ops = ðtool_ops; |
K. Y. Srinivasan | 9efd21e | 2011-04-29 13:45:10 -0700 | [diff] [blame] | 1440 | SET_NETDEV_DEV(net, &dev->device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1441 | |
Vitaly Kuznetsov | 14a03cf | 2016-02-05 17:29:08 +0100 | [diff] [blame] | 1442 | /* We always need headroom for rndis header */ |
| 1443 | net->needed_headroom = RNDIS_AND_PPI_SIZE; |
| 1444 | |
Haiyang Zhang | 692e084 | 2011-09-01 12:19:43 -0700 | [diff] [blame] | 1445 | /* Notify the netvsc driver of the new device */ |
Andrew Schwartzmeyer | 8ebdcc5 | 2015-08-11 17:14:31 -0700 | [diff] [blame] | 1446 | memset(&device_info, 0, sizeof(device_info)); |
Haiyang Zhang | 692e084 | 2011-09-01 12:19:43 -0700 | [diff] [blame] | 1447 | device_info.ring_size = ring_size; |
KY Srinivasan | e01ec21 | 2015-05-27 13:16:57 -0700 | [diff] [blame] | 1448 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
Haiyang Zhang | 692e084 | 2011-09-01 12:19:43 -0700 | [diff] [blame] | 1449 | ret = rndis_filter_device_add(dev, &device_info); |
| 1450 | if (ret != 0) { |
| 1451 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 1452 | netvsc_free_netdev(net); |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1453 | hv_set_drvdata(dev, NULL); |
Haiyang Zhang | 692e084 | 2011-09-01 12:19:43 -0700 | [diff] [blame] | 1454 | return ret; |
| 1455 | } |
| 1456 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
| 1457 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 1458 | nvdev = net_device_ctx->nvdev; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1459 | netif_set_real_num_tx_queues(net, nvdev->num_chn); |
| 1460 | netif_set_real_num_rx_queues(net, nvdev->num_chn); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1461 | |
Haiyang Zhang | a68f961 | 2013-12-20 16:52:31 -0800 | [diff] [blame] | 1462 | ret = register_netdev(net); |
| 1463 | if (ret != 0) { |
| 1464 | pr_err("Unable to register netdev.\n"); |
| 1465 | rndis_filter_device_remove(dev); |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 1466 | netvsc_free_netdev(net); |
Haiyang Zhang | a68f961 | 2013-12-20 16:52:31 -0800 | [diff] [blame] | 1467 | } |
| 1468 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1469 | return ret; |
| 1470 | } |
| 1471 | |
K. Y. Srinivasan | 415b023 | 2011-04-29 13:45:12 -0700 | [diff] [blame] | 1472 | static int netvsc_remove(struct hv_device *dev) |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1473 | { |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1474 | struct net_device *net; |
Haiyang Zhang | 122a5f6 | 2011-05-27 06:21:55 -0700 | [diff] [blame] | 1475 | struct net_device_context *ndev_ctx; |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1476 | struct netvsc_device *net_device; |
| 1477 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 1478 | net = hv_get_drvdata(dev); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1479 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1480 | if (net == NULL) { |
K. Y. Srinivasan | 415b023 | 2011-04-29 13:45:12 -0700 | [diff] [blame] | 1481 | dev_err(&dev->device, "No net device to remove\n"); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1482 | return 0; |
| 1483 | } |
| 1484 | |
Haiyang Zhang | 122a5f6 | 2011-05-27 06:21:55 -0700 | [diff] [blame] | 1485 | ndev_ctx = netdev_priv(net); |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 1486 | net_device = ndev_ctx->nvdev; |
| 1487 | |
Vitaly Kuznetsov | 6da7225 | 2016-05-13 13:55:24 +0200 | [diff] [blame] | 1488 | /* Avoid racing with netvsc_change_mtu()/netvsc_set_channels() |
| 1489 | * removing the device. |
| 1490 | */ |
| 1491 | rtnl_lock(); |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 1492 | ndev_ctx->start_remove = true; |
Vitaly Kuznetsov | 6da7225 | 2016-05-13 13:55:24 +0200 | [diff] [blame] | 1493 | rtnl_unlock(); |
Vitaly Kuznetsov | f580aec | 2016-05-13 13:55:20 +0200 | [diff] [blame] | 1494 | |
Haiyang Zhang | 122a5f6 | 2011-05-27 06:21:55 -0700 | [diff] [blame] | 1495 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
Wenqi Ma | 792df87 | 2012-04-19 00:39:37 +0000 | [diff] [blame] | 1496 | cancel_work_sync(&ndev_ctx->work); |
Haiyang Zhang | 122a5f6 | 2011-05-27 06:21:55 -0700 | [diff] [blame] | 1497 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1498 | /* Stop outbound asap */ |
Haiyang Zhang | 0a28253 | 2012-02-02 07:17:59 +0000 | [diff] [blame] | 1499 | netif_tx_disable(net); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1500 | |
| 1501 | unregister_netdev(net); |
| 1502 | |
| 1503 | /* |
| 1504 | * Call to the vsc driver to let it know that the device is being |
| 1505 | * removed |
| 1506 | */ |
Haiyang Zhang | df06bcf | 2011-05-23 09:03:47 -0700 | [diff] [blame] | 1507 | rndis_filter_device_remove(dev); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1508 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 1509 | hv_set_drvdata(dev, NULL); |
| 1510 | |
sixiao@microsoft.com | 7eafd9b | 2015-05-14 01:00:25 -0700 | [diff] [blame] | 1511 | netvsc_free_netdev(net); |
Haiyang Zhang | df06bcf | 2011-05-23 09:03:47 -0700 | [diff] [blame] | 1512 | return 0; |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1513 | } |
| 1514 | |
K. Y. Srinivasan | 345c4cc | 2011-08-25 09:48:34 -0700 | [diff] [blame] | 1515 | static const struct hv_vmbus_device_id id_table[] = { |
Greg Kroah-Hartman | c45cf2d | 2011-08-25 11:41:33 -0700 | [diff] [blame] | 1516 | /* Network guid */ |
K. Y. Srinivasan | 8f50594 | 2013-01-23 17:42:42 -0800 | [diff] [blame] | 1517 | { HV_NIC_GUID, }, |
Greg Kroah-Hartman | c45cf2d | 2011-08-25 11:41:33 -0700 | [diff] [blame] | 1518 | { }, |
K. Y. Srinivasan | 345c4cc | 2011-08-25 09:48:34 -0700 | [diff] [blame] | 1519 | }; |
| 1520 | |
| 1521 | MODULE_DEVICE_TABLE(vmbus, id_table); |
| 1522 | |
K. Y. Srinivasan | f1542a6 | 2011-05-10 07:55:16 -0700 | [diff] [blame] | 1523 | /* The one and only one */ |
K. Y. Srinivasan | fde0ef9 | 2011-05-12 19:35:08 -0700 | [diff] [blame] | 1524 | static struct hv_driver netvsc_drv = { |
Haiyang Zhang | d31b20f | 2012-03-07 10:02:00 +0000 | [diff] [blame] | 1525 | .name = KBUILD_MODNAME, |
K. Y. Srinivasan | 345c4cc | 2011-08-25 09:48:34 -0700 | [diff] [blame] | 1526 | .id_table = id_table, |
K. Y. Srinivasan | fde0ef9 | 2011-05-12 19:35:08 -0700 | [diff] [blame] | 1527 | .probe = netvsc_probe, |
| 1528 | .remove = netvsc_remove, |
K. Y. Srinivasan | d489097 | 2011-05-10 07:55:17 -0700 | [diff] [blame] | 1529 | }; |
K. Y. Srinivasan | f1542a6 | 2011-05-10 07:55:16 -0700 | [diff] [blame] | 1530 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1531 | /* |
| 1532 | * On Hyper-V, every VF interface is matched with a corresponding |
| 1533 | * synthetic interface. The synthetic interface is presented first |
| 1534 | * to the guest. When the corresponding VF instance is registered, |
| 1535 | * we will take care of switching the data path. |
| 1536 | */ |
| 1537 | static int netvsc_netdev_event(struct notifier_block *this, |
| 1538 | unsigned long event, void *ptr) |
| 1539 | { |
| 1540 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
| 1541 | |
Vitaly Kuznetsov | 0dbff14 | 2016-08-15 17:48:43 +0200 | [diff] [blame] | 1542 | /* Avoid Vlan dev with same MAC registering as VF */ |
| 1543 | if (event_dev->priv_flags & IFF_802_1Q_VLAN) |
| 1544 | return NOTIFY_DONE; |
| 1545 | |
| 1546 | /* Avoid Bonding master dev with same MAC registering as VF */ |
| 1547 | if (event_dev->priv_flags & IFF_BONDING && |
| 1548 | event_dev->flags & IFF_MASTER) |
Haiyang Zhang | cb2911f | 2016-06-02 12:02:04 -0700 | [diff] [blame] | 1549 | return NOTIFY_DONE; |
| 1550 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1551 | switch (event) { |
| 1552 | case NETDEV_REGISTER: |
| 1553 | return netvsc_register_vf(event_dev); |
| 1554 | case NETDEV_UNREGISTER: |
| 1555 | return netvsc_unregister_vf(event_dev); |
| 1556 | case NETDEV_UP: |
| 1557 | return netvsc_vf_up(event_dev); |
| 1558 | case NETDEV_DOWN: |
| 1559 | return netvsc_vf_down(event_dev); |
| 1560 | default: |
| 1561 | return NOTIFY_DONE; |
| 1562 | } |
| 1563 | } |
| 1564 | |
| 1565 | static struct notifier_block netvsc_netdev_notifier = { |
| 1566 | .notifier_call = netvsc_netdev_event, |
| 1567 | }; |
| 1568 | |
K. Y. Srinivasan | a9869c9 | 2011-05-12 19:35:17 -0700 | [diff] [blame] | 1569 | static void __exit netvsc_drv_exit(void) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1570 | { |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1571 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 1572 | vmbus_driver_unregister(&netvsc_drv); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1573 | } |
| 1574 | |
K. Y. Srinivasan | 1fde28c | 2011-05-12 19:35:16 -0700 | [diff] [blame] | 1575 | static int __init netvsc_drv_init(void) |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1576 | { |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1577 | int ret; |
| 1578 | |
Haiyang Zhang | fa85a6c | 2012-07-25 08:08:41 +0000 | [diff] [blame] | 1579 | if (ring_size < RING_SIZE_MIN) { |
| 1580 | ring_size = RING_SIZE_MIN; |
| 1581 | pr_info("Increased ring_size to %d (min allowed)\n", |
| 1582 | ring_size); |
| 1583 | } |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 1584 | ret = vmbus_driver_register(&netvsc_drv); |
| 1585 | |
| 1586 | if (ret) |
| 1587 | return ret; |
| 1588 | |
| 1589 | register_netdevice_notifier(&netvsc_netdev_notifier); |
| 1590 | return 0; |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 1591 | } |
| 1592 | |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 1593 | MODULE_LICENSE("GPL"); |
Stephen Hemminger | 7880fc5 | 2010-05-04 09:58:52 -0700 | [diff] [blame] | 1594 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1595 | |
K. Y. Srinivasan | 1fde28c | 2011-05-12 19:35:16 -0700 | [diff] [blame] | 1596 | module_init(netvsc_drv_init); |
K. Y. Srinivasan | a9869c9 | 2011-05-12 19:35:17 -0700 | [diff] [blame] | 1597 | module_exit(netvsc_drv_exit); |