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Hank Janssenfceaf242009-07-13 15:34:54 -07001/*
Hank Janssenfceaf242009-07-13 15:34:54 -07002 * 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 Kirsheradf8d3f2013-12-06 06:28:47 -080014 * this program; if not, see <http://www.gnu.org/licenses/>.
Hank Janssenfceaf242009-07-13 15:34:54 -070015 *
16 * Authors:
Haiyang Zhangd0e94d12009-11-23 17:00:22 +000017 * Haiyang Zhang <haiyangz@microsoft.com>
Hank Janssenfceaf242009-07-13 15:34:54 -070018 * Hank Janssen <hjanssen@microsoft.com>
Hank Janssenfceaf242009-07-13 15:34:54 -070019 */
Hank Jansseneb335bc2011-03-29 13:58:48 -070020#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
Hank Janssenfceaf242009-07-13 15:34:54 -070022#include <linux/init.h>
K. Y. Srinivasan9079ce62011-06-16 13:16:37 -070023#include <linux/atomic.h>
Hank Janssenfceaf242009-07-13 15:34:54 -070024#include <linux/module.h>
25#include <linux/highmem.h>
26#include <linux/device.h>
Hank Janssenfceaf242009-07-13 15:34:54 -070027#include <linux/io.h>
Hank Janssenfceaf242009-07-13 15:34:54 -070028#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 Zhangc802db12013-05-28 06:15:56 +000033#include <linux/if_vlan.h>
Hank Janssenfceaf242009-07-13 15:34:54 -070034#include <linux/in.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090035#include <linux/slab.h>
Hank Janssenfceaf242009-07-13 15:34:54 -070036#include <net/arp.h>
37#include <net/route.h>
38#include <net/sock.h>
39#include <net/pkt_sched.h>
K. Y. Srinivasan3f335ea2011-05-12 19:34:15 -070040
K. Y. Srinivasan5ca72522011-05-12 19:34:37 -070041#include "hyperv_net.h"
Hank Janssenfceaf242009-07-13 15:34:54 -070042
Hank Janssenfceaf242009-07-13 15:34:54 -070043
Haiyang Zhangfa85a6c2012-07-25 08:08:41 +000044#define RING_SIZE_MIN 64
Hank Janssen99c8da02010-10-12 10:45:23 -070045static int ring_size = 128;
Stephen Hemminger450d7a42010-05-04 09:58:53 -070046module_param(ring_size, int, S_IRUGO);
47MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
Hank Janssenfceaf242009-07-13 15:34:54 -070048
KY Srinivasane01ec212015-05-27 13:16:57 -070049static int max_num_vrss_chns = 8;
50
Simon Xiao3f300ff2015-04-28 01:05:17 -070051static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
52 NETIF_MSG_LINK | NETIF_MSG_IFUP |
53 NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR |
54 NETIF_MSG_TX_ERR;
55
56static int debug = -1;
57module_param(debug, int, S_IRUGO);
58MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
59
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080060static void do_set_multicast(struct work_struct *w)
61{
Wenqi Ma792df872012-04-19 00:39:37 +000062 struct net_device_context *ndevctx =
63 container_of(w, struct net_device_context, work);
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080064 struct netvsc_device *nvdev;
65 struct rndis_device *rdev;
66
67 nvdev = hv_get_drvdata(ndevctx->device_ctx);
Wenqi Ma792df872012-04-19 00:39:37 +000068 if (nvdev == NULL || nvdev->ndev == NULL)
69 return;
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080070
71 rdev = nvdev->extension;
72 if (rdev == NULL)
Wenqi Ma792df872012-04-19 00:39:37 +000073 return;
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080074
Wenqi Ma792df872012-04-19 00:39:37 +000075 if (nvdev->ndev->flags & IFF_PROMISC)
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080076 rndis_filter_set_packet_filter(rdev,
77 NDIS_PACKET_TYPE_PROMISCUOUS);
78 else
79 rndis_filter_set_packet_filter(rdev,
80 NDIS_PACKET_TYPE_BROADCAST |
81 NDIS_PACKET_TYPE_ALL_MULTICAST |
82 NDIS_PACKET_TYPE_DIRECTED);
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080083}
84
Greg Kroah-Hartman4e9bfef2009-07-15 12:45:20 -070085static void netvsc_set_multicast_list(struct net_device *net)
Hank Janssenfceaf242009-07-13 15:34:54 -070086{
Wenqi Ma792df872012-04-19 00:39:37 +000087 struct net_device_context *net_device_ctx = netdev_priv(net);
Haiyang Zhangd426b2e2011-11-30 07:19:08 -080088
Wenqi Ma792df872012-04-19 00:39:37 +000089 schedule_work(&net_device_ctx->work);
Hank Janssenfceaf242009-07-13 15:34:54 -070090}
91
Hank Janssenfceaf242009-07-13 15:34:54 -070092static int netvsc_open(struct net_device *net)
93{
Hank Janssenfceaf242009-07-13 15:34:54 -070094 struct net_device_context *net_device_ctx = netdev_priv(net);
K. Y. Srinivasan6bad88da2011-03-07 13:35:48 -080095 struct hv_device *device_obj = net_device_ctx->device_ctx;
Haiyang Zhang891de742014-02-12 16:54:27 -080096 struct netvsc_device *nvdev;
97 struct rndis_device *rdev;
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -070098 int ret = 0;
Hank Janssenfceaf242009-07-13 15:34:54 -070099
Haiyang Zhang891de742014-02-12 16:54:27 -0800100 netif_carrier_off(net);
101
Haiyang Zhangd515d0f2011-09-28 13:24:15 -0700102 /* Open up the device */
103 ret = rndis_filter_open(device_obj);
104 if (ret != 0) {
105 netdev_err(net, "unable to open device (ret %d).\n", ret);
106 return ret;
Hank Janssenfceaf242009-07-13 15:34:54 -0700107 }
108
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700109 netif_tx_start_all_queues(net);
Haiyang Zhangd515d0f2011-09-28 13:24:15 -0700110
Haiyang Zhang891de742014-02-12 16:54:27 -0800111 nvdev = hv_get_drvdata(device_obj);
112 rdev = nvdev->extension;
113 if (!rdev->link_state)
114 netif_carrier_on(net);
115
Hank Janssenfceaf242009-07-13 15:34:54 -0700116 return ret;
117}
118
Hank Janssenfceaf242009-07-13 15:34:54 -0700119static int netvsc_close(struct net_device *net)
120{
Hank Janssenfceaf242009-07-13 15:34:54 -0700121 struct net_device_context *net_device_ctx = netdev_priv(net);
K. Y. Srinivasan6bad88da2011-03-07 13:35:48 -0800122 struct hv_device *device_obj = net_device_ctx->device_ctx;
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700123 int ret;
Hank Janssenfceaf242009-07-13 15:34:54 -0700124
Haiyang Zhang0a282532012-02-02 07:17:59 +0000125 netif_tx_disable(net);
Hank Janssenfceaf242009-07-13 15:34:54 -0700126
Wenqi Ma792df872012-04-19 00:39:37 +0000127 /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */
128 cancel_work_sync(&net_device_ctx->work);
Haiyang Zhang9c26aa02010-12-10 12:03:57 -0800129 ret = rndis_filter_close(device_obj);
Hank Janssenfceaf242009-07-13 15:34:54 -0700130 if (ret != 0)
Hank Jansseneb335bc2011-03-29 13:58:48 -0700131 netdev_err(net, "unable to close device (ret %d).\n", ret);
Hank Janssenfceaf242009-07-13 15:34:54 -0700132
Hank Janssenfceaf242009-07-13 15:34:54 -0700133 return ret;
134}
135
KY Srinivasan8a002512014-03-08 19:23:14 -0800136static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size,
137 int pkt_type)
138{
139 struct rndis_packet *rndis_pkt;
140 struct rndis_per_packet_info *ppi;
141
142 rndis_pkt = &msg->msg.pkt;
143 rndis_pkt->data_offset += ppi_size;
144
145 ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt +
146 rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len);
147
148 ppi->size = ppi_size;
149 ppi->type = pkt_type;
150 ppi->ppi_offset = sizeof(struct rndis_per_packet_info);
151
152 rndis_pkt->per_pkt_info_len += ppi_size;
153
154 return ppi;
155}
156
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700157union sub_key {
158 u64 k;
159 struct {
160 u8 pad[3];
161 u8 kb;
162 u32 ka;
163 };
164};
165
166/* Toeplitz hash function
167 * data: network byte order
168 * return: host byte order
169 */
Haiyang Zhangf88e6712014-10-16 14:47:58 -0700170static u32 comp_hash(u8 *key, int klen, void *data, int dlen)
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700171{
172 union sub_key subk;
173 int k_next = 4;
174 u8 dt;
175 int i, j;
176 u32 ret = 0;
177
178 subk.k = 0;
179 subk.ka = ntohl(*(u32 *)key);
180
181 for (i = 0; i < dlen; i++) {
182 subk.kb = key[k_next];
183 k_next = (k_next + 1) % klen;
Haiyang Zhangf88e6712014-10-16 14:47:58 -0700184 dt = ((u8 *)data)[i];
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700185 for (j = 0; j < 8; j++) {
186 if (dt & 0x80)
187 ret ^= subk.ka;
188 dt <<= 1;
189 subk.k <<= 1;
190 }
191 }
192
193 return ret;
194}
195
196static bool netvsc_set_hash(u32 *hash, struct sk_buff *skb)
197{
Haiyang Zhangf88e6712014-10-16 14:47:58 -0700198 struct flow_keys flow;
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700199 int data_len;
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700200
Jiri Pirko06635a32015-05-12 14:56:16 +0200201 if (!skb_flow_dissect_flow_keys(skb, &flow) ||
202 !(flow.basic.n_proto == htons(ETH_P_IP) ||
203 flow.basic.n_proto == htons(ETH_P_IPV6)))
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700204 return false;
205
Jiri Pirko06635a32015-05-12 14:56:16 +0200206 if (flow.basic.ip_proto == IPPROTO_TCP)
Haiyang Zhangf88e6712014-10-16 14:47:58 -0700207 data_len = 12;
208 else
209 data_len = 8;
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700210
Haiyang Zhangf88e6712014-10-16 14:47:58 -0700211 *hash = comp_hash(netvsc_hash_key, HASH_KEYLEN, &flow, data_len);
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700212
Haiyang Zhangf88e6712014-10-16 14:47:58 -0700213 return true;
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700214}
215
216static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
217 void *accel_priv, select_queue_fallback_t fallback)
218{
219 struct net_device_context *net_device_ctx = netdev_priv(ndev);
220 struct hv_device *hdev = net_device_ctx->device_ctx;
221 struct netvsc_device *nvsc_dev = hv_get_drvdata(hdev);
222 u32 hash;
223 u16 q_idx = 0;
224
225 if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1)
226 return 0;
227
Haiyang Zhang307f0992014-05-21 12:55:39 -0700228 if (netvsc_set_hash(&hash, skb)) {
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700229 q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] %
230 ndev->real_num_tx_queues;
Haiyang Zhang307f0992014-05-21 12:55:39 -0700231 skb_set_hash(skb, hash, PKT_HASH_TYPE_L3);
232 }
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700233
234 return q_idx;
235}
236
Haiyang Zhangee90b812015-04-06 15:22:54 -0700237void netvsc_xmit_completion(void *context)
Hank Janssenfceaf242009-07-13 15:34:54 -0700238{
Nicolas Palix4193d4f2009-07-29 14:10:10 +0200239 struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context;
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700240 struct sk_buff *skb = (struct sk_buff *)
Haiyang Zhang893f6622014-04-21 14:54:44 -0700241 (unsigned long)packet->send_completion_tid;
Hank Janssenfceaf242009-07-13 15:34:54 -0700242
KY Srinivasancbacec72015-03-29 21:08:41 -0700243 if (skb)
Hank Janssenfceaf242009-07-13 15:34:54 -0700244 dev_kfree_skb_any(skb);
Hank Janssenfceaf242009-07-13 15:34:54 -0700245}
246
KY Srinivasan54a73572014-03-08 19:23:13 -0800247static u32 fill_pg_buf(struct page *page, u32 offset, u32 len,
248 struct hv_page_buffer *pb)
249{
250 int j = 0;
251
252 /* Deal with compund pages by ignoring unused part
253 * of the page.
254 */
255 page += (offset >> PAGE_SHIFT);
256 offset &= ~PAGE_MASK;
257
258 while (len > 0) {
259 unsigned long bytes;
260
261 bytes = PAGE_SIZE - offset;
262 if (bytes > len)
263 bytes = len;
264 pb[j].pfn = page_to_pfn(page);
265 pb[j].offset = offset;
266 pb[j].len = bytes;
267
268 offset += bytes;
269 len -= bytes;
270
271 if (offset == PAGE_SIZE && len) {
272 page++;
273 offset = 0;
274 j++;
275 }
276 }
277
278 return j + 1;
279}
280
KY Srinivasan8a002512014-03-08 19:23:14 -0800281static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb,
Haiyang Zhangaa0a34b2015-04-13 16:34:35 -0700282 struct hv_netvsc_packet *packet)
KY Srinivasan54a73572014-03-08 19:23:13 -0800283{
Haiyang Zhangaa0a34b2015-04-13 16:34:35 -0700284 struct hv_page_buffer *pb = packet->page_buf;
KY Srinivasan54a73572014-03-08 19:23:13 -0800285 u32 slots_used = 0;
286 char *data = skb->data;
287 int frags = skb_shinfo(skb)->nr_frags;
288 int i;
289
290 /* The packet is laid out thus:
Haiyang Zhangaa0a34b2015-04-13 16:34:35 -0700291 * 1. hdr: RNDIS header and PPI
KY Srinivasan54a73572014-03-08 19:23:13 -0800292 * 2. skb linear data
293 * 3. skb fragment data
294 */
295 if (hdr != NULL)
296 slots_used += fill_pg_buf(virt_to_page(hdr),
297 offset_in_page(hdr),
298 len, &pb[slots_used]);
299
Haiyang Zhangaa0a34b2015-04-13 16:34:35 -0700300 packet->rmsg_size = len;
301 packet->rmsg_pgcnt = slots_used;
302
KY Srinivasan54a73572014-03-08 19:23:13 -0800303 slots_used += fill_pg_buf(virt_to_page(data),
304 offset_in_page(data),
305 skb_headlen(skb), &pb[slots_used]);
306
307 for (i = 0; i < frags; i++) {
308 skb_frag_t *frag = skb_shinfo(skb)->frags + i;
309
310 slots_used += fill_pg_buf(skb_frag_page(frag),
311 frag->page_offset,
312 skb_frag_size(frag), &pb[slots_used]);
313 }
KY Srinivasan8a002512014-03-08 19:23:14 -0800314 return slots_used;
KY Srinivasan54a73572014-03-08 19:23:13 -0800315}
316
317static int count_skb_frag_slots(struct sk_buff *skb)
318{
319 int i, frags = skb_shinfo(skb)->nr_frags;
320 int pages = 0;
321
322 for (i = 0; i < frags; i++) {
323 skb_frag_t *frag = skb_shinfo(skb)->frags + i;
324 unsigned long size = skb_frag_size(frag);
325 unsigned long offset = frag->page_offset;
326
327 /* Skip unused frames from start of page */
328 offset &= ~PAGE_MASK;
329 pages += PFN_UP(offset + size);
330 }
331 return pages;
332}
333
334static int netvsc_get_slots(struct sk_buff *skb)
335{
336 char *data = skb->data;
337 unsigned int offset = offset_in_page(data);
338 unsigned int len = skb_headlen(skb);
339 int slots;
340 int frag_slots;
341
342 slots = DIV_ROUND_UP(offset + len, PAGE_SIZE);
343 frag_slots = count_skb_frag_slots(skb);
344 return slots + frag_slots;
345}
346
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800347static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off)
348{
349 u32 ret_val = TRANSPORT_INFO_NOT_IP;
350
351 if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) &&
352 (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) {
353 goto not_ip;
354 }
355
356 *trans_off = skb_transport_offset(skb);
357
358 if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) {
359 struct iphdr *iphdr = ip_hdr(skb);
360
361 if (iphdr->protocol == IPPROTO_TCP)
362 ret_val = TRANSPORT_INFO_IPV4_TCP;
363 else if (iphdr->protocol == IPPROTO_UDP)
364 ret_val = TRANSPORT_INFO_IPV4_UDP;
365 } else {
366 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
367 ret_val = TRANSPORT_INFO_IPV6_TCP;
368 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
369 ret_val = TRANSPORT_INFO_IPV6_UDP;
370 }
371
372not_ip:
373 return ret_val;
374}
375
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700376static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
Hank Janssenfceaf242009-07-13 15:34:54 -0700377{
Hank Janssenfceaf242009-07-13 15:34:54 -0700378 struct net_device_context *net_device_ctx = netdev_priv(net);
Vitaly Kuznetsov981a1bd2015-04-08 17:54:05 +0200379 struct hv_netvsc_packet *packet = NULL;
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700380 int ret;
KY Srinivasan8a002512014-03-08 19:23:14 -0800381 unsigned int num_data_pgs;
382 struct rndis_message *rndis_msg;
383 struct rndis_packet *rndis_pkt;
384 u32 rndis_msg_size;
385 bool isvlan;
Vitaly Kuznetsove88f7e02015-04-08 17:54:06 +0200386 bool linear = false;
KY Srinivasan8a002512014-03-08 19:23:14 -0800387 struct rndis_per_packet_info *ppi;
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800388 struct ndis_tcp_ip_checksum_info *csum_info;
KY Srinivasan77bf5482014-03-08 19:23:18 -0800389 struct ndis_tcp_lso_info *lso_info;
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800390 int hdr_offset;
391 u32 net_trans_info;
Haiyang Zhang307f0992014-05-21 12:55:39 -0700392 u32 hash;
Vitaly Kuznetsove88f7e02015-04-08 17:54:06 +0200393 u32 skb_length;
KY Srinivasanb08cc792015-03-29 21:08:42 -0700394 u32 pkt_sz;
395 struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT];
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700396 struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats);
Hank Janssenfceaf242009-07-13 15:34:54 -0700397
KY Srinivasan54a73572014-03-08 19:23:13 -0800398 /* We will atmost need two pages to describe the rndis
399 * header. We can only transmit MAX_PAGE_BUFFER_COUNT number
Vitaly Kuznetsove88f7e02015-04-08 17:54:06 +0200400 * of pages in a single packet. If skb is scattered around
401 * more pages we try linearizing it.
KY Srinivasan54a73572014-03-08 19:23:13 -0800402 */
Vitaly Kuznetsove88f7e02015-04-08 17:54:06 +0200403
404check_size:
405 skb_length = skb->len;
KY Srinivasan8a002512014-03-08 19:23:14 -0800406 num_data_pgs = netvsc_get_slots(skb) + 2;
Vitaly Kuznetsove88f7e02015-04-08 17:54:06 +0200407 if (num_data_pgs > MAX_PAGE_BUFFER_COUNT && linear) {
408 net_alert_ratelimited("packet too big: %u pages (%u bytes)\n",
409 num_data_pgs, skb->len);
Vitaly Kuznetsov981a1bd2015-04-08 17:54:05 +0200410 ret = -EFAULT;
411 goto drop;
Vitaly Kuznetsove88f7e02015-04-08 17:54:06 +0200412 } else if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) {
413 if (skb_linearize(skb)) {
414 net_alert_ratelimited("failed to linearize skb\n");
415 ret = -ENOMEM;
416 goto drop;
417 }
418 linear = true;
419 goto check_size;
KY Srinivasan54a73572014-03-08 19:23:13 -0800420 }
Hank Janssenfceaf242009-07-13 15:34:54 -0700421
Haiyang Zhang72151422015-04-06 15:22:53 -0700422 pkt_sz = sizeof(struct hv_netvsc_packet) + RNDIS_AND_PPI_SIZE;
Stephen Hemmingerb220f5f2010-05-04 09:58:56 -0700423
KY Srinivasanb56fc3c2015-04-28 17:59:48 -0700424 ret = skb_cow_head(skb, pkt_sz);
425 if (ret) {
426 netdev_err(net, "unable to alloc hv_netvsc_packet\n");
427 ret = -ENOMEM;
428 goto drop;
Hank Janssenfceaf242009-07-13 15:34:54 -0700429 }
KY Srinivasanb56fc3c2015-04-28 17:59:48 -0700430 /* Use the headroom for building up the packet */
431 packet = (struct hv_netvsc_packet *)skb->head;
Hank Janssenfceaf242009-07-13 15:34:54 -0700432
KY Srinivasanb08cc792015-03-29 21:08:42 -0700433 packet->status = 0;
Haiyang Zhang7c3877f2015-03-26 09:03:37 -0700434 packet->xmit_more = skb->xmit_more;
435
Haiyang Zhang1f5f3a72012-03-12 10:20:50 +0000436 packet->vlan_tci = skb->vlan_tci;
KY Srinivasanb08cc792015-03-29 21:08:42 -0700437 packet->page_buf = page_buf;
Haiyang Zhang1f5f3a72012-03-12 10:20:50 +0000438
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700439 packet->q_idx = skb_get_queue_mapping(skb);
440
KY Srinivasan8a002512014-03-08 19:23:14 -0800441 packet->is_data_pkt = true;
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800442 packet->total_data_buflen = skb->len;
Hank Janssenfceaf242009-07-13 15:34:54 -0700443
KY Srinivasan8a002512014-03-08 19:23:14 -0800444 packet->rndis_msg = (struct rndis_message *)((unsigned long)packet +
KY Srinivasanb08cc792015-03-29 21:08:42 -0700445 sizeof(struct hv_netvsc_packet));
446
Haiyang Zhang72151422015-04-06 15:22:53 -0700447 memset(packet->rndis_msg, 0, RNDIS_AND_PPI_SIZE);
Hank Janssenfceaf242009-07-13 15:34:54 -0700448
Bill Pemberton454f18a2009-07-27 16:47:24 -0400449 /* Set the completion routine */
Haiyang Zhang893f6622014-04-21 14:54:44 -0700450 packet->send_completion = netvsc_xmit_completion;
451 packet->send_completion_ctx = packet;
452 packet->send_completion_tid = (unsigned long)skb;
Hank Janssenfceaf242009-07-13 15:34:54 -0700453
KY Srinivasan8a002512014-03-08 19:23:14 -0800454 isvlan = packet->vlan_tci & VLAN_TAG_PRESENT;
455
456 /* Add the rndis header */
457 rndis_msg = packet->rndis_msg;
458 rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET;
459 rndis_msg->msg_len = packet->total_data_buflen;
460 rndis_pkt = &rndis_msg->msg.pkt;
461 rndis_pkt->data_offset = sizeof(struct rndis_packet);
462 rndis_pkt->data_len = packet->total_data_buflen;
463 rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet);
464
465 rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
466
Haiyang Zhang307f0992014-05-21 12:55:39 -0700467 hash = skb_get_hash_raw(skb);
468 if (hash != 0 && net->real_num_tx_queues > 1) {
469 rndis_msg_size += NDIS_HASH_PPI_SIZE;
470 ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE,
471 NBL_HASH_VALUE);
472 *(u32 *)((void *)ppi + ppi->ppi_offset) = hash;
473 }
474
KY Srinivasan8a002512014-03-08 19:23:14 -0800475 if (isvlan) {
476 struct ndis_pkt_8021q_info *vlan;
477
478 rndis_msg_size += NDIS_VLAN_PPI_SIZE;
479 ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE,
480 IEEE_8021Q_INFO);
481 vlan = (struct ndis_pkt_8021q_info *)((void *)ppi +
482 ppi->ppi_offset);
483 vlan->vlanid = packet->vlan_tci & VLAN_VID_MASK;
484 vlan->pri = (packet->vlan_tci & VLAN_PRIO_MASK) >>
485 VLAN_PRIO_SHIFT;
486 }
487
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800488 net_trans_info = get_net_transport_info(skb, &hdr_offset);
489 if (net_trans_info == TRANSPORT_INFO_NOT_IP)
490 goto do_send;
491
492 /*
493 * Setup the sendside checksum offload only if this is not a
494 * GSO packet.
495 */
496 if (skb_is_gso(skb))
KY Srinivasan77bf5482014-03-08 19:23:18 -0800497 goto do_lso;
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800498
KY Srinivasan22041fb2014-04-30 11:58:25 -0700499 if ((skb->ip_summed == CHECKSUM_NONE) ||
500 (skb->ip_summed == CHECKSUM_UNNECESSARY))
501 goto do_send;
502
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800503 rndis_msg_size += NDIS_CSUM_PPI_SIZE;
504 ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
505 TCPIP_CHKSUM_PKTINFO);
506
507 csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi +
508 ppi->ppi_offset);
509
510 if (net_trans_info & (INFO_IPV4 << 16))
511 csum_info->transmit.is_ipv4 = 1;
512 else
513 csum_info->transmit.is_ipv6 = 1;
514
515 if (net_trans_info & INFO_TCP) {
516 csum_info->transmit.tcp_checksum = 1;
517 csum_info->transmit.tcp_header_offset = hdr_offset;
518 } else if (net_trans_info & INFO_UDP) {
KY Srinivasanaf9893a2014-04-09 15:00:47 -0700519 /* UDP checksum offload is not supported on ws2008r2.
520 * Furthermore, on ws2012 and ws2012r2, there are some
521 * issues with udp checksum offload from Linux guests.
522 * (these are host issues).
523 * For now compute the checksum here.
524 */
525 struct udphdr *uh;
526 u16 udp_len;
527
528 ret = skb_cow_head(skb, 0);
529 if (ret)
530 goto drop;
531
532 uh = udp_hdr(skb);
533 udp_len = ntohs(uh->len);
534 uh->check = 0;
535 uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr,
536 ip_hdr(skb)->daddr,
537 udp_len, IPPROTO_UDP,
538 csum_partial(uh, udp_len, 0));
539 if (uh->check == 0)
540 uh->check = CSUM_MANGLED_0;
541
542 csum_info->transmit.udp_checksum = 0;
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800543 }
KY Srinivasan77bf5482014-03-08 19:23:18 -0800544 goto do_send;
545
546do_lso:
547 rndis_msg_size += NDIS_LSO_PPI_SIZE;
548 ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
549 TCP_LARGESEND_PKTINFO);
550
551 lso_info = (struct ndis_tcp_lso_info *)((void *)ppi +
552 ppi->ppi_offset);
553
554 lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE;
555 if (net_trans_info & (INFO_IPV4 << 16)) {
556 lso_info->lso_v2_transmit.ip_version =
557 NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4;
558 ip_hdr(skb)->tot_len = 0;
559 ip_hdr(skb)->check = 0;
560 tcp_hdr(skb)->check =
561 ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
562 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
563 } else {
564 lso_info->lso_v2_transmit.ip_version =
565 NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6;
566 ipv6_hdr(skb)->payload_len = 0;
567 tcp_hdr(skb)->check =
568 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
569 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
570 }
571 lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset;
572 lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size;
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800573
574do_send:
KY Srinivasan8a002512014-03-08 19:23:14 -0800575 /* Start filling in the page buffers with the rndis hdr */
576 rndis_msg->msg_len += rndis_msg_size;
Haiyang Zhang942396b2014-10-22 13:47:18 -0700577 packet->total_data_buflen = rndis_msg->msg_len;
KY Srinivasan8a002512014-03-08 19:23:14 -0800578 packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
Haiyang Zhangaa0a34b2015-04-13 16:34:35 -0700579 skb, packet);
KY Srinivasan8a002512014-03-08 19:23:14 -0800580
581 ret = netvsc_send(net_device_ctx->device_ctx, packet);
582
KY Srinivasanaf9893a2014-04-09 15:00:47 -0700583drop:
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700584 if (ret == 0) {
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700585 u64_stats_update_begin(&tx_stats->syncp);
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700586 tx_stats->packets++;
587 tx_stats->bytes += skb_length;
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700588 u64_stats_update_end(&tx_stats->syncp);
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700589 } else {
Haiyang Zhang33be96e2012-03-27 13:20:45 +0000590 if (ret != -EAGAIN) {
591 dev_kfree_skb_any(skb);
592 net->stats.tx_dropped++;
593 }
Hank Janssenfceaf242009-07-13 15:34:54 -0700594 }
595
Haiyang Zhang33be96e2012-03-27 13:20:45 +0000596 return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK;
Hank Janssenfceaf242009-07-13 15:34:54 -0700597}
598
Hank Janssen3e189512010-03-04 22:11:00 +0000599/*
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700600 * netvsc_linkstatus_callback - Link up/down notification
601 */
K. Y. Srinivasan90ef1172011-05-12 19:34:50 -0700602void netvsc_linkstatus_callback(struct hv_device *device_obj,
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700603 struct rndis_message *resp)
Hank Janssenfceaf242009-07-13 15:34:54 -0700604{
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700605 struct rndis_indicate_status *indicate = &resp->msg.indicate_status;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700606 struct net_device *net;
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700607 struct net_device_context *ndev_ctx;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700608 struct netvsc_device *net_device;
Haiyang Zhang891de742014-02-12 16:54:27 -0800609 struct rndis_device *rdev;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700610
611 net_device = hv_get_drvdata(device_obj);
Haiyang Zhang891de742014-02-12 16:54:27 -0800612 rdev = net_device->extension;
613
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700614 switch (indicate->status) {
615 case RNDIS_STATUS_MEDIA_CONNECT:
616 rdev->link_state = false;
617 break;
618 case RNDIS_STATUS_MEDIA_DISCONNECT:
619 rdev->link_state = true;
620 break;
621 case RNDIS_STATUS_NETWORK_CHANGE:
622 rdev->link_change = true;
623 break;
624 default:
625 return;
626 }
Haiyang Zhang891de742014-02-12 16:54:27 -0800627
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700628 net = net_device->ndev;
Hank Janssenfceaf242009-07-13 15:34:54 -0700629
Haiyang Zhang891de742014-02-12 16:54:27 -0800630 if (!net || net->reg_state != NETREG_REGISTERED)
Hank Janssenfceaf242009-07-13 15:34:54 -0700631 return;
Hank Janssenfceaf242009-07-13 15:34:54 -0700632
Haiyang Zhang891de742014-02-12 16:54:27 -0800633 ndev_ctx = netdev_priv(net);
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700634 if (!rdev->link_state) {
Haiyang Zhangc4b6a2e2011-09-01 12:19:42 -0700635 schedule_delayed_work(&ndev_ctx->dwork, 0);
Haiyang Zhang122a5f62011-05-27 06:21:55 -0700636 schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20));
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700637 } else {
Haiyang Zhang891de742014-02-12 16:54:27 -0800638 schedule_delayed_work(&ndev_ctx->dwork, 0);
Hank Janssenfceaf242009-07-13 15:34:54 -0700639 }
Hank Janssenfceaf242009-07-13 15:34:54 -0700640}
641
Hank Janssen3e189512010-03-04 22:11:00 +0000642/*
643 * netvsc_recv_callback - Callback when we receive a packet from the
644 * "wire" on the specified device.
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700645 */
K. Y. Srinivasanf79adf82011-05-12 19:34:51 -0700646int netvsc_recv_callback(struct hv_device *device_obj,
KY Srinivasane3d605e2014-03-08 19:23:16 -0800647 struct hv_netvsc_packet *packet,
648 struct ndis_tcp_ip_checksum_info *csum_info)
Hank Janssenfceaf242009-07-13 15:34:54 -0700649{
Haiyang Zhang6f4c4442012-02-05 12:13:09 +0000650 struct net_device *net;
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700651 struct net_device_context *net_device_ctx;
Hank Janssenfceaf242009-07-13 15:34:54 -0700652 struct sk_buff *skb;
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700653 struct netvsc_stats *rx_stats;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700654
Haiyang Zhang6f4c4442012-02-05 12:13:09 +0000655 net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev;
Haiyang Zhanga68f9612013-12-20 16:52:31 -0800656 if (!net || net->reg_state != NETREG_REGISTERED) {
Haiyang Zhang63f69212012-10-02 05:30:23 +0000657 packet->status = NVSP_STAT_FAIL;
Hank Janssenfceaf242009-07-13 15:34:54 -0700658 return 0;
659 }
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700660 net_device_ctx = netdev_priv(net);
661 rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
Hank Janssenfceaf242009-07-13 15:34:54 -0700662
Stephen Hemminger9495c282010-03-09 17:42:17 -0800663 /* Allocate a skb - TODO direct I/O to pages? */
Haiyang Zhang72a2f5b2010-12-10 12:03:58 -0800664 skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen);
Stephen Hemminger9495c282010-03-09 17:42:17 -0800665 if (unlikely(!skb)) {
666 ++net->stats.rx_dropped;
Haiyang Zhang63f69212012-10-02 05:30:23 +0000667 packet->status = NVSP_STAT_FAIL;
Stephen Hemminger9495c282010-03-09 17:42:17 -0800668 return 0;
669 }
Hank Janssenfceaf242009-07-13 15:34:54 -0700670
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700671 /*
672 * Copy to skb. This copy is needed here since the memory pointed by
673 * hv_netvsc_packet cannot be deallocated
674 */
Haiyang Zhang45326342011-12-15 13:45:15 -0800675 memcpy(skb_put(skb, packet->total_data_buflen), packet->data,
676 packet->total_data_buflen);
Hank Janssenfceaf242009-07-13 15:34:54 -0700677
678 skb->protocol = eth_type_trans(skb, net);
KY Srinivasane3d605e2014-03-08 19:23:16 -0800679 if (csum_info) {
680 /* We only look at the IP checksum here.
681 * Should we be dropping the packet if checksum
682 * failed? How do we deal with other checksums - TCP/UDP?
683 */
684 if (csum_info->receive.ip_checksum_succeeded)
685 skb->ip_summed = CHECKSUM_UNNECESSARY;
686 else
687 skb->ip_summed = CHECKSUM_NONE;
688 }
689
Haiyang Zhang93725cb2013-06-17 15:36:49 -0700690 if (packet->vlan_tci & VLAN_TAG_PRESENT)
691 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
692 packet->vlan_tci);
Hank Janssenfceaf242009-07-13 15:34:54 -0700693
Haiyang Zhang4baab262014-04-21 14:54:43 -0700694 skb_record_rx_queue(skb, packet->channel->
Haiyang Zhange565e802014-05-08 15:14:10 -0700695 offermsg.offer.sub_channel_index);
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700696
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700697 u64_stats_update_begin(&rx_stats->syncp);
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700698 rx_stats->packets++;
699 rx_stats->bytes += packet->total_data_buflen;
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700700 u64_stats_update_end(&rx_stats->syncp);
Stephen Hemminger9495c282010-03-09 17:42:17 -0800701
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700702 /*
703 * Pass the skb back up. Network stack will deallocate the skb when it
Stephen Hemminger9495c282010-03-09 17:42:17 -0800704 * is done.
705 * TODO - use NAPI?
Greg Kroah-Hartman02fafbc2009-08-31 21:09:45 -0700706 */
Stephen Hemminger9495c282010-03-09 17:42:17 -0800707 netif_rx(skb);
Hank Janssenfceaf242009-07-13 15:34:54 -0700708
Hank Janssenfceaf242009-07-13 15:34:54 -0700709 return 0;
710}
711
Stephen Hemmingerf82f4ad2010-05-04 09:58:57 -0700712static void netvsc_get_drvinfo(struct net_device *net,
713 struct ethtool_drvinfo *info)
714{
Jiri Pirko7826d432013-01-06 00:44:26 +0000715 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
Jiri Pirko7826d432013-01-06 00:44:26 +0000716 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
Stephen Hemmingerf82f4ad2010-05-04 09:58:57 -0700717}
718
Andrew Schwartzmeyer59995372015-02-26 16:27:14 -0800719static void netvsc_get_channels(struct net_device *net,
720 struct ethtool_channels *channel)
721{
722 struct net_device_context *net_device_ctx = netdev_priv(net);
723 struct hv_device *dev = net_device_ctx->device_ctx;
724 struct netvsc_device *nvdev = hv_get_drvdata(dev);
725
726 if (nvdev) {
727 channel->max_combined = nvdev->max_chn;
728 channel->combined_count = nvdev->num_chn;
729 }
730}
731
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800732static int netvsc_change_mtu(struct net_device *ndev, int mtu)
733{
734 struct net_device_context *ndevctx = netdev_priv(ndev);
735 struct hv_device *hdev = ndevctx->device_ctx;
736 struct netvsc_device *nvdev = hv_get_drvdata(hdev);
737 struct netvsc_device_info device_info;
738 int limit = ETH_DATA_LEN;
739
740 if (nvdev == NULL || nvdev->destroy)
741 return -ENODEV;
742
Haiyang Zhanga1eabb02014-02-19 15:49:45 -0800743 if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2)
Haiyang Zhang4d3c9d32014-11-12 14:07:44 -0800744 limit = NETVSC_MTU - ETH_HLEN;
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800745
Haiyang Zhang4d3c9d32014-11-12 14:07:44 -0800746 /* Hyper-V hosts don't support MTU < ETH_DATA_LEN (1500) */
747 if (mtu < ETH_DATA_LEN || mtu > limit)
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800748 return -EINVAL;
749
750 nvdev->start_remove = true;
Wenqi Ma792df872012-04-19 00:39:37 +0000751 cancel_work_sync(&ndevctx->work);
Haiyang Zhang0a282532012-02-02 07:17:59 +0000752 netif_tx_disable(ndev);
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800753 rndis_filter_device_remove(hdev);
754
755 ndev->mtu = mtu;
756
757 ndevctx->device_ctx = hdev;
758 hv_set_drvdata(hdev, ndev);
759 device_info.ring_size = ring_size;
KY Srinivasane01ec212015-05-27 13:16:57 -0700760 device_info.max_num_vrss_chns = max_num_vrss_chns;
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800761 rndis_filter_device_add(hdev, &device_info);
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700762 netif_tx_wake_all_queues(ndev);
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800763
764 return 0;
765}
766
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700767static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net,
768 struct rtnl_link_stats64 *t)
769{
770 struct net_device_context *ndev_ctx = netdev_priv(net);
771 int cpu;
772
773 for_each_possible_cpu(cpu) {
774 struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats,
775 cpu);
776 struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats,
777 cpu);
778 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
779 unsigned int start;
780
781 do {
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700782 start = u64_stats_fetch_begin_irq(&tx_stats->syncp);
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700783 tx_packets = tx_stats->packets;
784 tx_bytes = tx_stats->bytes;
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700785 } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start));
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700786
787 do {
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700788 start = u64_stats_fetch_begin_irq(&rx_stats->syncp);
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700789 rx_packets = rx_stats->packets;
790 rx_bytes = rx_stats->bytes;
sixiao@microsoft.com4b02b582015-05-15 02:33:03 -0700791 } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700792
793 t->tx_bytes += tx_bytes;
794 t->tx_packets += tx_packets;
795 t->rx_bytes += rx_bytes;
796 t->rx_packets += rx_packets;
797 }
798
799 t->tx_dropped = net->stats.tx_dropped;
800 t->tx_errors = net->stats.tx_dropped;
801
802 t->rx_dropped = net->stats.rx_dropped;
803 t->rx_errors = net->stats.rx_errors;
804
805 return t;
806}
Haiyang Zhang1ce09e82012-07-10 07:19:22 +0000807
808static int netvsc_set_mac_addr(struct net_device *ndev, void *p)
809{
810 struct net_device_context *ndevctx = netdev_priv(ndev);
811 struct hv_device *hdev = ndevctx->device_ctx;
812 struct sockaddr *addr = p;
Jianjun Kong9a4c8312013-01-18 16:52:09 +0000813 char save_adr[ETH_ALEN];
Haiyang Zhang1ce09e82012-07-10 07:19:22 +0000814 unsigned char save_aatype;
815 int err;
816
817 memcpy(save_adr, ndev->dev_addr, ETH_ALEN);
818 save_aatype = ndev->addr_assign_type;
819
820 err = eth_mac_addr(ndev, p);
821 if (err != 0)
822 return err;
823
824 err = rndis_filter_set_device_mac(hdev, addr->sa_data);
825 if (err != 0) {
826 /* roll back to saved MAC */
827 memcpy(ndev->dev_addr, save_adr, ETH_ALEN);
828 ndev->addr_assign_type = save_aatype;
829 }
830
831 return err;
832}
833
Richard Weinberger316158f2014-07-09 16:23:59 +0200834#ifdef CONFIG_NET_POLL_CONTROLLER
835static void netvsc_poll_controller(struct net_device *net)
836{
837 /* As netvsc_start_xmit() works synchronous we don't have to
838 * trigger anything here.
839 */
840}
841#endif
Haiyang Zhang1ce09e82012-07-10 07:19:22 +0000842
Stephen Hemmingerf82f4ad2010-05-04 09:58:57 -0700843static const struct ethtool_ops ethtool_ops = {
844 .get_drvinfo = netvsc_get_drvinfo,
Stephen Hemmingerf82f4ad2010-05-04 09:58:57 -0700845 .get_link = ethtool_op_get_link,
Andrew Schwartzmeyer59995372015-02-26 16:27:14 -0800846 .get_channels = netvsc_get_channels,
Stephen Hemmingerf82f4ad2010-05-04 09:58:57 -0700847};
848
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700849static const struct net_device_ops device_ops = {
850 .ndo_open = netvsc_open,
851 .ndo_stop = netvsc_close,
852 .ndo_start_xmit = netvsc_start_xmit,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000853 .ndo_set_rx_mode = netvsc_set_multicast_list,
Haiyang Zhang4d447c92011-12-15 13:45:17 -0800854 .ndo_change_mtu = netvsc_change_mtu,
Haiyang Zhangb681b582010-08-03 19:15:31 +0000855 .ndo_validate_addr = eth_validate_addr,
Haiyang Zhang1ce09e82012-07-10 07:19:22 +0000856 .ndo_set_mac_address = netvsc_set_mac_addr,
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700857 .ndo_select_queue = netvsc_select_queue,
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700858 .ndo_get_stats64 = netvsc_get_stats64,
Richard Weinberger316158f2014-07-09 16:23:59 +0200859#ifdef CONFIG_NET_POLL_CONTROLLER
860 .ndo_poll_controller = netvsc_poll_controller,
861#endif
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700862};
863
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700864/*
865 * Send GARP packet to network peers after migrations.
866 * After Quick Migration, the network is not immediately operational in the
867 * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add
Haiyang Zhang122a5f62011-05-27 06:21:55 -0700868 * another netif_notify_peers() into a delayed work, otherwise GARP packet
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700869 * will not be sent after quick migration, and cause network disconnection.
Haiyang Zhang891de742014-02-12 16:54:27 -0800870 * Also, we update the carrier status here.
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700871 */
Haiyang Zhang891de742014-02-12 16:54:27 -0800872static void netvsc_link_change(struct work_struct *w)
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700873{
874 struct net_device_context *ndev_ctx;
875 struct net_device *net;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700876 struct netvsc_device *net_device;
Haiyang Zhang891de742014-02-12 16:54:27 -0800877 struct rndis_device *rdev;
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700878 bool notify, refresh = false;
879 char *argv[] = { "/etc/init.d/network", "restart", NULL };
880 char *envp[] = { "HOME=/", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
Haiyang Zhang891de742014-02-12 16:54:27 -0800881
882 rtnl_lock();
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700883
Haiyang Zhang122a5f62011-05-27 06:21:55 -0700884 ndev_ctx = container_of(w, struct net_device_context, dwork.work);
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700885 net_device = hv_get_drvdata(ndev_ctx->device_ctx);
Haiyang Zhang891de742014-02-12 16:54:27 -0800886 rdev = net_device->extension;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700887 net = net_device->ndev;
Haiyang Zhang891de742014-02-12 16:54:27 -0800888
889 if (rdev->link_state) {
890 netif_carrier_off(net);
891 notify = false;
892 } else {
893 netif_carrier_on(net);
894 notify = true;
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700895 if (rdev->link_change) {
896 rdev->link_change = false;
897 refresh = true;
898 }
Haiyang Zhang891de742014-02-12 16:54:27 -0800899 }
900
901 rtnl_unlock();
902
Haiyang Zhang3a494e72014-06-19 18:34:36 -0700903 if (refresh)
904 call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
905
Haiyang Zhang891de742014-02-12 16:54:27 -0800906 if (notify)
907 netdev_notify_peers(net);
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700908}
909
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700910static void netvsc_free_netdev(struct net_device *netdev)
911{
912 struct net_device_context *net_device_ctx = netdev_priv(netdev);
913
914 free_percpu(net_device_ctx->tx_stats);
915 free_percpu(net_device_ctx->rx_stats);
916 free_netdev(netdev);
917}
Haiyang Zhangc996edc2011-04-06 15:18:00 -0700918
K. Y. Srinivasan84946892011-09-13 10:59:38 -0700919static int netvsc_probe(struct hv_device *dev,
920 const struct hv_vmbus_device_id *dev_id)
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700921{
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700922 struct net_device *net = NULL;
923 struct net_device_context *net_device_ctx;
924 struct netvsc_device_info device_info;
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700925 struct netvsc_device *nvdev;
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700926 int ret;
KY Srinivasanb08cc792015-03-29 21:08:42 -0700927 u32 max_needed_headroom;
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700928
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700929 net = alloc_etherdev_mq(sizeof(struct net_device_context),
930 num_online_cpus());
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700931 if (!net)
K. Y. Srinivasan51a805d2011-08-25 09:49:11 -0700932 return -ENOMEM;
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700933
KY Srinivasanb08cc792015-03-29 21:08:42 -0700934 max_needed_headroom = sizeof(struct hv_netvsc_packet) +
Haiyang Zhang72151422015-04-06 15:22:53 -0700935 RNDIS_AND_PPI_SIZE;
KY Srinivasanb08cc792015-03-29 21:08:42 -0700936
Haiyang Zhang1b07da52014-03-04 14:11:06 -0800937 netif_carrier_off(net);
938
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700939 net_device_ctx = netdev_priv(net);
K. Y. Srinivasan9efd21e2011-04-29 13:45:10 -0700940 net_device_ctx->device_ctx = dev;
Simon Xiao3f300ff2015-04-28 01:05:17 -0700941 net_device_ctx->msg_enable = netif_msg_init(debug, default_msg);
942 if (netif_msg_probe(net_device_ctx))
943 netdev_dbg(net, "netvsc msg_enable: %d\n",
944 net_device_ctx->msg_enable);
945
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700946 net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats);
947 if (!net_device_ctx->tx_stats) {
948 free_netdev(net);
949 return -ENOMEM;
950 }
951 net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats);
952 if (!net_device_ctx->rx_stats) {
953 free_percpu(net_device_ctx->tx_stats);
954 free_netdev(net);
955 return -ENOMEM;
956 }
957
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700958 hv_set_drvdata(dev, net);
Haiyang Zhang891de742014-02-12 16:54:27 -0800959 INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change);
Wenqi Ma792df872012-04-19 00:39:37 +0000960 INIT_WORK(&net_device_ctx->work, do_set_multicast);
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700961
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700962 net->netdev_ops = &device_ops;
963
KY Srinivasan77bf5482014-03-08 19:23:18 -0800964 net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM |
965 NETIF_F_TSO;
KY Srinivasan08cd04b2014-03-08 19:23:17 -0800966 net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM |
KY Srinivasan77bf5482014-03-08 19:23:18 -0800967 NETIF_F_IP_CSUM | NETIF_F_TSO;
Stephen Hemminger60487182010-05-04 09:58:55 -0700968
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +0000969 net->ethtool_ops = &ethtool_ops;
K. Y. Srinivasan9efd21e2011-04-29 13:45:10 -0700970 SET_NETDEV_DEV(net, &dev->device);
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -0700971
KY Srinivasanb08cc792015-03-29 21:08:42 -0700972 /*
973 * Request additional head room in the skb.
974 * We will use this space to build the rndis
975 * heaser and other state we need to maintain.
976 */
977 net->needed_headroom = max_needed_headroom;
978
Haiyang Zhang692e0842011-09-01 12:19:43 -0700979 /* Notify the netvsc driver of the new device */
980 device_info.ring_size = ring_size;
KY Srinivasane01ec212015-05-27 13:16:57 -0700981 device_info.max_num_vrss_chns = max_num_vrss_chns;
Haiyang Zhang692e0842011-09-01 12:19:43 -0700982 ret = rndis_filter_device_add(dev, &device_info);
983 if (ret != 0) {
984 netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700985 netvsc_free_netdev(net);
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -0700986 hv_set_drvdata(dev, NULL);
Haiyang Zhang692e0842011-09-01 12:19:43 -0700987 return ret;
988 }
989 memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
990
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700991 nvdev = hv_get_drvdata(dev);
992 netif_set_real_num_tx_queues(net, nvdev->num_chn);
993 netif_set_real_num_rx_queues(net, nvdev->num_chn);
Haiyang Zhang5b54dac2014-04-21 10:20:28 -0700994
Haiyang Zhanga68f9612013-12-20 16:52:31 -0800995 ret = register_netdev(net);
996 if (ret != 0) {
997 pr_err("Unable to register netdev.\n");
998 rndis_filter_device_remove(dev);
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -0700999 netvsc_free_netdev(net);
Haiyang Zhang1b07da52014-03-04 14:11:06 -08001000 } else {
1001 schedule_delayed_work(&net_device_ctx->dwork, 0);
Haiyang Zhanga68f9612013-12-20 16:52:31 -08001002 }
1003
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001004 return ret;
1005}
1006
K. Y. Srinivasan415b0232011-04-29 13:45:12 -07001007static int netvsc_remove(struct hv_device *dev)
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001008{
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -07001009 struct net_device *net;
Haiyang Zhang122a5f62011-05-27 06:21:55 -07001010 struct net_device_context *ndev_ctx;
K. Y. Srinivasan2ddd5e5f2011-09-13 10:59:49 -07001011 struct netvsc_device *net_device;
1012
1013 net_device = hv_get_drvdata(dev);
1014 net = net_device->ndev;
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001015
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001016 if (net == NULL) {
K. Y. Srinivasan415b0232011-04-29 13:45:12 -07001017 dev_err(&dev->device, "No net device to remove\n");
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001018 return 0;
1019 }
1020
Haiyang Zhang4d447c92011-12-15 13:45:17 -08001021 net_device->start_remove = true;
1022
Haiyang Zhang122a5f62011-05-27 06:21:55 -07001023 ndev_ctx = netdev_priv(net);
1024 cancel_delayed_work_sync(&ndev_ctx->dwork);
Wenqi Ma792df872012-04-19 00:39:37 +00001025 cancel_work_sync(&ndev_ctx->work);
Haiyang Zhang122a5f62011-05-27 06:21:55 -07001026
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001027 /* Stop outbound asap */
Haiyang Zhang0a282532012-02-02 07:17:59 +00001028 netif_tx_disable(net);
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001029
1030 unregister_netdev(net);
1031
1032 /*
1033 * Call to the vsc driver to let it know that the device is being
1034 * removed
1035 */
Haiyang Zhangdf06bcf2011-05-23 09:03:47 -07001036 rndis_filter_device_remove(dev);
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001037
sixiao@microsoft.com7eafd9b2015-05-14 01:00:25 -07001038 netvsc_free_netdev(net);
Haiyang Zhangdf06bcf2011-05-23 09:03:47 -07001039 return 0;
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001040}
1041
K. Y. Srinivasan345c4cc2011-08-25 09:48:34 -07001042static const struct hv_vmbus_device_id id_table[] = {
Greg Kroah-Hartmanc45cf2d2011-08-25 11:41:33 -07001043 /* Network guid */
K. Y. Srinivasan8f505942013-01-23 17:42:42 -08001044 { HV_NIC_GUID, },
Greg Kroah-Hartmanc45cf2d2011-08-25 11:41:33 -07001045 { },
K. Y. Srinivasan345c4cc2011-08-25 09:48:34 -07001046};
1047
1048MODULE_DEVICE_TABLE(vmbus, id_table);
1049
K. Y. Srinivasanf1542a62011-05-10 07:55:16 -07001050/* The one and only one */
K. Y. Srinivasanfde0ef92011-05-12 19:35:08 -07001051static struct hv_driver netvsc_drv = {
Haiyang Zhangd31b20f2012-03-07 10:02:00 +00001052 .name = KBUILD_MODNAME,
K. Y. Srinivasan345c4cc2011-08-25 09:48:34 -07001053 .id_table = id_table,
K. Y. Srinivasanfde0ef92011-05-12 19:35:08 -07001054 .probe = netvsc_probe,
1055 .remove = netvsc_remove,
K. Y. Srinivasand4890972011-05-10 07:55:17 -07001056};
K. Y. Srinivasanf1542a62011-05-10 07:55:16 -07001057
K. Y. Srinivasana9869c92011-05-12 19:35:17 -07001058static void __exit netvsc_drv_exit(void)
Hank Janssenfceaf242009-07-13 15:34:54 -07001059{
Greg Kroah-Hartman768fa212011-08-25 15:07:32 -07001060 vmbus_driver_unregister(&netvsc_drv);
Hank Janssenfceaf242009-07-13 15:34:54 -07001061}
1062
K. Y. Srinivasan1fde28c2011-05-12 19:35:16 -07001063static int __init netvsc_drv_init(void)
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001064{
Haiyang Zhangfa85a6c2012-07-25 08:08:41 +00001065 if (ring_size < RING_SIZE_MIN) {
1066 ring_size = RING_SIZE_MIN;
1067 pr_info("Increased ring_size to %d (min allowed)\n",
1068 ring_size);
1069 }
Greg Kroah-Hartman768fa212011-08-25 15:07:32 -07001070 return vmbus_driver_register(&netvsc_drv);
Greg Kroah-Hartmandf2fff22009-08-31 21:11:12 -07001071}
1072
Hank Janssen26c14cc2010-02-11 23:02:42 +00001073MODULE_LICENSE("GPL");
Stephen Hemminger7880fc52010-05-04 09:58:52 -07001074MODULE_DESCRIPTION("Microsoft Hyper-V network driver");
Hank Janssenfceaf242009-07-13 15:34:54 -07001075
K. Y. Srinivasan1fde28c2011-05-12 19:35:16 -07001076module_init(netvsc_drv_init);
K. Y. Srinivasana9869c92011-05-12 19:35:17 -07001077module_exit(netvsc_drv_exit);