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9952f691 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
fceaf24a | 2 | /* |
fceaf24a HJ |
3 | * Copyright (c) 2009, Microsoft Corporation. |
4 | * | |
fceaf24a | 5 | * Authors: |
d0e94d17 | 6 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 7 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 8 | */ |
eb335bc4 HJ |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
10 | ||
fceaf24a | 11 | #include <linux/init.h> |
9079ce69 | 12 | #include <linux/atomic.h> |
fceaf24a HJ |
13 | #include <linux/module.h> |
14 | #include <linux/highmem.h> | |
15 | #include <linux/device.h> | |
fceaf24a | 16 | #include <linux/io.h> |
fceaf24a HJ |
17 | #include <linux/delay.h> |
18 | #include <linux/netdevice.h> | |
19 | #include <linux/inetdevice.h> | |
20 | #include <linux/etherdevice.h> | |
b93c1b5a | 21 | #include <linux/pci.h> |
fceaf24a | 22 | #include <linux/skbuff.h> |
c802db11 | 23 | #include <linux/if_vlan.h> |
fceaf24a | 24 | #include <linux/in.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
27f5aa92 | 26 | #include <linux/rtnetlink.h> |
0c195567 | 27 | #include <linux/netpoll.h> |
351e1581 | 28 | #include <linux/bpf.h> |
27f5aa92 | 29 | |
fceaf24a HJ |
30 | #include <net/arp.h> |
31 | #include <net/route.h> | |
32 | #include <net/sock.h> | |
33 | #include <net/pkt_sched.h> | |
8eb1b3c3 MK |
34 | #include <net/checksum.h> |
35 | #include <net/ip6_checksum.h> | |
3f335ea2 | 36 | |
5ca7252a | 37 | #include "hyperv_net.h" |
fceaf24a | 38 | |
7b2ee50c SH |
39 | #define RING_SIZE_MIN 64 |
40 | #define RETRY_US_LO 5000 | |
41 | #define RETRY_US_HI 10000 | |
42 | #define RETRY_MAX 2000 /* >10 sec */ | |
8b532797 | 43 | |
27a70af3 | 44 | #define LINKCHANGE_INT (2 * HZ) |
6123c668 | 45 | #define VF_TAKEOVER_INT (HZ / 10) |
a50af86d | 46 | |
a7f99d0f | 47 | static unsigned int ring_size __ro_after_init = 128; |
d61e4038 | 48 | module_param(ring_size, uint, 0444); |
450d7a4b | 49 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); |
a7f99d0f | 50 | unsigned int netvsc_ring_bytes __ro_after_init; |
fceaf24a | 51 | |
3f300ff4 SX |
52 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
53 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
54 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
55 | NETIF_MSG_TX_ERR; | |
56 | ||
57 | static int debug = -1; | |
d61e4038 | 58 | module_param(debug, int, 0444); |
3f300ff4 SX |
59 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
60 | ||
7bf7bb37 SH |
61 | static LIST_HEAD(netvsc_dev_list); |
62 | ||
bee9d41b | 63 | static void netvsc_change_rx_flags(struct net_device *net, int change) |
fceaf24a | 64 | { |
bee9d41b SH |
65 | struct net_device_context *ndev_ctx = netdev_priv(net); |
66 | struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); | |
67 | int inc; | |
68 | ||
69 | if (!vf_netdev) | |
70 | return; | |
71 | ||
72 | if (change & IFF_PROMISC) { | |
73 | inc = (net->flags & IFF_PROMISC) ? 1 : -1; | |
74 | dev_set_promiscuity(vf_netdev, inc); | |
75 | } | |
76 | ||
77 | if (change & IFF_ALLMULTI) { | |
78 | inc = (net->flags & IFF_ALLMULTI) ? 1 : -1; | |
79 | dev_set_allmulti(vf_netdev, inc); | |
80 | } | |
81 | } | |
82 | ||
83 | static void netvsc_set_rx_mode(struct net_device *net) | |
84 | { | |
85 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
35a57b7f SH |
86 | struct net_device *vf_netdev; |
87 | struct netvsc_device *nvdev; | |
bee9d41b | 88 | |
35a57b7f SH |
89 | rcu_read_lock(); |
90 | vf_netdev = rcu_dereference(ndev_ctx->vf_netdev); | |
bee9d41b SH |
91 | if (vf_netdev) { |
92 | dev_uc_sync(vf_netdev, net); | |
93 | dev_mc_sync(vf_netdev, net); | |
94 | } | |
d426b2e3 | 95 | |
35a57b7f SH |
96 | nvdev = rcu_dereference(ndev_ctx->nvdev); |
97 | if (nvdev) | |
98 | rndis_filter_update(nvdev); | |
99 | rcu_read_unlock(); | |
fceaf24a HJ |
100 | } |
101 | ||
1b704c4a HZ |
102 | static void netvsc_tx_enable(struct netvsc_device *nvscdev, |
103 | struct net_device *ndev) | |
104 | { | |
105 | nvscdev->tx_disable = false; | |
106 | virt_wmb(); /* ensure queue wake up mechanism is on */ | |
107 | ||
108 | netif_tx_wake_all_queues(ndev); | |
109 | } | |
110 | ||
fceaf24a HJ |
111 | static int netvsc_open(struct net_device *net) |
112 | { | |
53fa1a6f | 113 | struct net_device_context *ndev_ctx = netdev_priv(net); |
0c195567 | 114 | struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
79e8cbe7 | 115 | struct netvsc_device *nvdev = rtnl_dereference(ndev_ctx->nvdev); |
891de74d | 116 | struct rndis_device *rdev; |
02fafbc6 | 117 | int ret = 0; |
fceaf24a | 118 | |
891de74d HZ |
119 | netif_carrier_off(net); |
120 | ||
d515d0ff | 121 | /* Open up the device */ |
2f5fa6c8 | 122 | ret = rndis_filter_open(nvdev); |
d515d0ff HZ |
123 | if (ret != 0) { |
124 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
125 | return ret; | |
fceaf24a HJ |
126 | } |
127 | ||
891de74d | 128 | rdev = nvdev->extension; |
52acf73b | 129 | if (!rdev->link_state) { |
891de74d | 130 | netif_carrier_on(net); |
1b704c4a | 131 | netvsc_tx_enable(nvdev, net); |
52acf73b | 132 | } |
891de74d | 133 | |
0c195567 | 134 | if (vf_netdev) { |
135 | /* Setting synthetic device up transparently sets | |
136 | * slave as up. If open fails, then slave will be | |
137 | * still be offline (and not used). | |
138 | */ | |
00f54e68 | 139 | ret = dev_open(vf_netdev, NULL); |
0c195567 | 140 | if (ret) |
141 | netdev_warn(net, | |
142 | "unable to open slave: %s: %d\n", | |
143 | vf_netdev->name, ret); | |
144 | } | |
145 | return 0; | |
fceaf24a HJ |
146 | } |
147 | ||
7b2ee50c | 148 | static int netvsc_wait_until_empty(struct netvsc_device *nvdev) |
fceaf24a | 149 | { |
7b2ee50c SH |
150 | unsigned int retry = 0; |
151 | int i; | |
2de8530b HZ |
152 | |
153 | /* Ensure pending bytes in ring are read */ | |
7b2ee50c SH |
154 | for (;;) { |
155 | u32 aread = 0; | |
156 | ||
2de8530b | 157 | for (i = 0; i < nvdev->num_chn; i++) { |
7b2ee50c SH |
158 | struct vmbus_channel *chn |
159 | = nvdev->chan_table[i].channel; | |
160 | ||
2de8530b HZ |
161 | if (!chn) |
162 | continue; | |
163 | ||
7b2ee50c SH |
164 | /* make sure receive not running now */ |
165 | napi_synchronize(&nvdev->chan_table[i].napi); | |
166 | ||
40975962 | 167 | aread = hv_get_bytes_to_read(&chn->inbound); |
2de8530b HZ |
168 | if (aread) |
169 | break; | |
170 | ||
40975962 | 171 | aread = hv_get_bytes_to_read(&chn->outbound); |
2de8530b HZ |
172 | if (aread) |
173 | break; | |
174 | } | |
175 | ||
7b2ee50c SH |
176 | if (aread == 0) |
177 | return 0; | |
2de8530b | 178 | |
7b2ee50c SH |
179 | if (++retry > RETRY_MAX) |
180 | return -ETIMEDOUT; | |
2de8530b | 181 | |
7b2ee50c | 182 | usleep_range(RETRY_US_LO, RETRY_US_HI); |
2de8530b | 183 | } |
7b2ee50c | 184 | } |
2de8530b | 185 | |
1b704c4a HZ |
186 | static void netvsc_tx_disable(struct netvsc_device *nvscdev, |
187 | struct net_device *ndev) | |
188 | { | |
189 | if (nvscdev) { | |
190 | nvscdev->tx_disable = true; | |
191 | virt_wmb(); /* ensure txq will not wake up after stop */ | |
192 | } | |
193 | ||
194 | netif_tx_disable(ndev); | |
195 | } | |
196 | ||
7b2ee50c SH |
197 | static int netvsc_close(struct net_device *net) |
198 | { | |
199 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
200 | struct net_device *vf_netdev | |
201 | = rtnl_dereference(net_device_ctx->vf_netdev); | |
202 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); | |
203 | int ret; | |
204 | ||
1b704c4a | 205 | netvsc_tx_disable(nvdev, net); |
7b2ee50c SH |
206 | |
207 | /* No need to close rndis filter if it is removed already */ | |
208 | if (!nvdev) | |
209 | return 0; | |
210 | ||
211 | ret = rndis_filter_close(nvdev); | |
212 | if (ret != 0) { | |
213 | netdev_err(net, "unable to close device (ret %d).\n", ret); | |
214 | return ret; | |
2de8530b | 215 | } |
fceaf24a | 216 | |
7b2ee50c SH |
217 | ret = netvsc_wait_until_empty(nvdev); |
218 | if (ret) | |
219 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); | |
220 | ||
0c195567 | 221 | if (vf_netdev) |
222 | dev_close(vf_netdev); | |
223 | ||
fceaf24a HJ |
224 | return ret; |
225 | } | |
226 | ||
f5a22550 SH |
227 | static inline void *init_ppi_data(struct rndis_message *msg, |
228 | u32 ppi_size, u32 pkt_type) | |
8a00251a | 229 | { |
f5a22550 | 230 | struct rndis_packet *rndis_pkt = &msg->msg.pkt; |
8a00251a KS |
231 | struct rndis_per_packet_info *ppi; |
232 | ||
8a00251a | 233 | rndis_pkt->data_offset += ppi_size; |
f5a22550 SH |
234 | ppi = (void *)rndis_pkt + rndis_pkt->per_pkt_info_offset |
235 | + rndis_pkt->per_pkt_info_len; | |
8a00251a KS |
236 | |
237 | ppi->size = ppi_size; | |
238 | ppi->type = pkt_type; | |
e3a9667a | 239 | ppi->internal = 0; |
8a00251a KS |
240 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); |
241 | ||
242 | rndis_pkt->per_pkt_info_len += ppi_size; | |
243 | ||
f5a22550 | 244 | return ppi + 1; |
8a00251a KS |
245 | } |
246 | ||
4823eb2f HZ |
247 | /* Azure hosts don't support non-TCP port numbers in hashing for fragmented |
248 | * packets. We can use ethtool to change UDP hash level when necessary. | |
f72860af | 249 | */ |
4823eb2f HZ |
250 | static inline u32 netvsc_get_hash( |
251 | struct sk_buff *skb, | |
252 | const struct net_device_context *ndc) | |
f72860af HZ |
253 | { |
254 | struct flow_keys flow; | |
486e3981 | 255 | u32 hash, pkt_proto = 0; |
f72860af HZ |
256 | static u32 hashrnd __read_mostly; |
257 | ||
258 | net_get_random_once(&hashrnd, sizeof(hashrnd)); | |
259 | ||
260 | if (!skb_flow_dissect_flow_keys(skb, &flow, 0)) | |
261 | return 0; | |
262 | ||
486e3981 HZ |
263 | switch (flow.basic.ip_proto) { |
264 | case IPPROTO_TCP: | |
265 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
266 | pkt_proto = HV_TCP4_L4HASH; | |
267 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
268 | pkt_proto = HV_TCP6_L4HASH; | |
269 | ||
270 | break; | |
271 | ||
272 | case IPPROTO_UDP: | |
273 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
274 | pkt_proto = HV_UDP4_L4HASH; | |
275 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
276 | pkt_proto = HV_UDP6_L4HASH; | |
277 | ||
278 | break; | |
279 | } | |
280 | ||
281 | if (pkt_proto & ndc->l4_hash) { | |
f72860af HZ |
282 | return skb_get_hash(skb); |
283 | } else { | |
284 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
285 | hash = jhash2((u32 *)&flow.addrs.v4addrs, 2, hashrnd); | |
286 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
287 | hash = jhash2((u32 *)&flow.addrs.v6addrs, 8, hashrnd); | |
288 | else | |
df9f540c | 289 | return 0; |
f72860af | 290 | |
df9f540c | 291 | __skb_set_sw_hash(skb, hash, false); |
f72860af HZ |
292 | } |
293 | ||
294 | return hash; | |
295 | } | |
296 | ||
8db91f6a HZ |
297 | static inline int netvsc_get_tx_queue(struct net_device *ndev, |
298 | struct sk_buff *skb, int old_idx) | |
299 | { | |
300 | const struct net_device_context *ndc = netdev_priv(ndev); | |
301 | struct sock *sk = skb->sk; | |
302 | int q_idx; | |
303 | ||
39e91cfb HZ |
304 | q_idx = ndc->tx_table[netvsc_get_hash(skb, ndc) & |
305 | (VRSS_SEND_TAB_SIZE - 1)]; | |
8db91f6a HZ |
306 | |
307 | /* If queue index changed record the new value */ | |
308 | if (q_idx != old_idx && | |
309 | sk && sk_fullsock(sk) && rcu_access_pointer(sk->sk_dst_cache)) | |
310 | sk_tx_queue_set(sk, q_idx); | |
311 | ||
312 | return q_idx; | |
313 | } | |
314 | ||
d8e18ee0 | 315 | /* |
316 | * Select queue for transmit. | |
317 | * | |
318 | * If a valid queue has already been assigned, then use that. | |
319 | * Otherwise compute tx queue based on hash and the send table. | |
320 | * | |
a350ecce | 321 | * This is basically similar to default (netdev_pick_tx) with the added step |
d8e18ee0 | 322 | * of using the host send_table when no other queue has been assigned. |
323 | * | |
324 | * TODO support XPS - but get_xps_queue not exported | |
325 | */ | |
0c195567 | 326 | static u16 netvsc_pick_tx(struct net_device *ndev, struct sk_buff *skb) |
5b54dac8 | 327 | { |
8db91f6a HZ |
328 | int q_idx = sk_tx_queue_get(skb->sk); |
329 | ||
0c195567 | 330 | if (q_idx < 0 || skb->ooo_okay || q_idx >= ndev->real_num_tx_queues) { |
8db91f6a HZ |
331 | /* If forwarding a packet, we use the recorded queue when |
332 | * available for better cache locality. | |
333 | */ | |
334 | if (skb_rx_queue_recorded(skb)) | |
335 | q_idx = skb_get_rx_queue(skb); | |
336 | else | |
337 | q_idx = netvsc_get_tx_queue(ndev, skb, q_idx); | |
d8e18ee0 | 338 | } |
5b54dac8 HZ |
339 | |
340 | return q_idx; | |
341 | } | |
342 | ||
0c195567 | 343 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
a350ecce | 344 | struct net_device *sb_dev) |
0c195567 | 345 | { |
346 | struct net_device_context *ndc = netdev_priv(ndev); | |
347 | struct net_device *vf_netdev; | |
348 | u16 txq; | |
349 | ||
350 | rcu_read_lock(); | |
351 | vf_netdev = rcu_dereference(ndc->vf_netdev); | |
352 | if (vf_netdev) { | |
b3bf5666 SH |
353 | const struct net_device_ops *vf_ops = vf_netdev->netdev_ops; |
354 | ||
355 | if (vf_ops->ndo_select_queue) | |
a350ecce | 356 | txq = vf_ops->ndo_select_queue(vf_netdev, skb, sb_dev); |
b3bf5666 | 357 | else |
a350ecce | 358 | txq = netdev_pick_tx(vf_netdev, skb, NULL); |
b3bf5666 SH |
359 | |
360 | /* Record the queue selected by VF so that it can be | |
361 | * used for common case where VF has more queues than | |
362 | * the synthetic device. | |
363 | */ | |
364 | qdisc_skb_cb(skb)->slave_dev_queue_mapping = txq; | |
0c195567 | 365 | } else { |
366 | txq = netvsc_pick_tx(ndev, skb); | |
367 | } | |
368 | rcu_read_unlock(); | |
369 | ||
370 | while (unlikely(txq >= ndev->real_num_tx_queues)) | |
371 | txq -= ndev->real_num_tx_queues; | |
372 | ||
373 | return txq; | |
374 | } | |
375 | ||
54a7357f | 376 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
89bb42b1 | 377 | struct hv_page_buffer *pb) |
54a7357f KS |
378 | { |
379 | int j = 0; | |
380 | ||
52d3b494 | 381 | /* Deal with compound pages by ignoring unused part |
54a7357f KS |
382 | * of the page. |
383 | */ | |
384 | page += (offset >> PAGE_SHIFT); | |
385 | offset &= ~PAGE_MASK; | |
386 | ||
387 | while (len > 0) { | |
388 | unsigned long bytes; | |
389 | ||
390 | bytes = PAGE_SIZE - offset; | |
391 | if (bytes > len) | |
392 | bytes = len; | |
393 | pb[j].pfn = page_to_pfn(page); | |
394 | pb[j].offset = offset; | |
395 | pb[j].len = bytes; | |
396 | ||
397 | offset += bytes; | |
398 | len -= bytes; | |
399 | ||
400 | if (offset == PAGE_SIZE && len) { | |
401 | page++; | |
402 | offset = 0; | |
403 | j++; | |
404 | } | |
405 | } | |
406 | ||
407 | return j + 1; | |
408 | } | |
409 | ||
8a00251a | 410 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 | 411 | struct hv_netvsc_packet *packet, |
02b6de01 | 412 | struct hv_page_buffer *pb) |
54a7357f KS |
413 | { |
414 | u32 slots_used = 0; | |
415 | char *data = skb->data; | |
416 | int frags = skb_shinfo(skb)->nr_frags; | |
417 | int i; | |
418 | ||
419 | /* The packet is laid out thus: | |
aa0a34be | 420 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
421 | * 2. skb linear data |
422 | * 3. skb fragment data | |
423 | */ | |
ea5a32c0 | 424 | slots_used += fill_pg_buf(virt_to_page(hdr), |
425 | offset_in_page(hdr), | |
426 | len, &pb[slots_used]); | |
54a7357f | 427 | |
aa0a34be HZ |
428 | packet->rmsg_size = len; |
429 | packet->rmsg_pgcnt = slots_used; | |
430 | ||
54a7357f KS |
431 | slots_used += fill_pg_buf(virt_to_page(data), |
432 | offset_in_page(data), | |
433 | skb_headlen(skb), &pb[slots_used]); | |
434 | ||
435 | for (i = 0; i < frags; i++) { | |
436 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
437 | ||
438 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
b54c9d5b | 439 | skb_frag_off(frag), |
54a7357f KS |
440 | skb_frag_size(frag), &pb[slots_used]); |
441 | } | |
8a00251a | 442 | return slots_used; |
54a7357f KS |
443 | } |
444 | ||
80d887db | 445 | static int count_skb_frag_slots(struct sk_buff *skb) |
446 | { | |
447 | int i, frags = skb_shinfo(skb)->nr_frags; | |
448 | int pages = 0; | |
449 | ||
450 | for (i = 0; i < frags; i++) { | |
451 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
452 | unsigned long size = skb_frag_size(frag); | |
b54c9d5b | 453 | unsigned long offset = skb_frag_off(frag); |
80d887db | 454 | |
455 | /* Skip unused frames from start of page */ | |
456 | offset &= ~PAGE_MASK; | |
457 | pages += PFN_UP(offset + size); | |
458 | } | |
459 | return pages; | |
460 | } | |
461 | ||
462 | static int netvsc_get_slots(struct sk_buff *skb) | |
54a7357f | 463 | { |
80d887db | 464 | char *data = skb->data; |
465 | unsigned int offset = offset_in_page(data); | |
466 | unsigned int len = skb_headlen(skb); | |
467 | int slots; | |
468 | int frag_slots; | |
469 | ||
470 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
471 | frag_slots = count_skb_frag_slots(skb); | |
472 | return slots + frag_slots; | |
54a7357f KS |
473 | } |
474 | ||
23312a3b | 475 | static u32 net_checksum_info(struct sk_buff *skb) |
08cd04bf | 476 | { |
23312a3b | 477 | if (skb->protocol == htons(ETH_P_IP)) { |
478 | struct iphdr *ip = ip_hdr(skb); | |
08cd04bf | 479 | |
23312a3b | 480 | if (ip->protocol == IPPROTO_TCP) |
481 | return TRANSPORT_INFO_IPV4_TCP; | |
482 | else if (ip->protocol == IPPROTO_UDP) | |
483 | return TRANSPORT_INFO_IPV4_UDP; | |
08cd04bf | 484 | } else { |
23312a3b | 485 | struct ipv6hdr *ip6 = ipv6_hdr(skb); |
486 | ||
487 | if (ip6->nexthdr == IPPROTO_TCP) | |
488 | return TRANSPORT_INFO_IPV6_TCP; | |
37b9dfa0 | 489 | else if (ip6->nexthdr == IPPROTO_UDP) |
23312a3b | 490 | return TRANSPORT_INFO_IPV6_UDP; |
08cd04bf KS |
491 | } |
492 | ||
23312a3b | 493 | return TRANSPORT_INFO_NOT_IP; |
08cd04bf KS |
494 | } |
495 | ||
0c195567 | 496 | /* Send skb on the slave VF device. */ |
497 | static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev, | |
498 | struct sk_buff *skb) | |
499 | { | |
500 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
501 | unsigned int len = skb->len; | |
502 | int rc; | |
503 | ||
504 | skb->dev = vf_netdev; | |
505 | skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping; | |
506 | ||
507 | rc = dev_queue_xmit(skb); | |
508 | if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) { | |
509 | struct netvsc_vf_pcpu_stats *pcpu_stats | |
510 | = this_cpu_ptr(ndev_ctx->vf_stats); | |
511 | ||
512 | u64_stats_update_begin(&pcpu_stats->syncp); | |
513 | pcpu_stats->tx_packets++; | |
514 | pcpu_stats->tx_bytes += len; | |
515 | u64_stats_update_end(&pcpu_stats->syncp); | |
516 | } else { | |
517 | this_cpu_inc(ndev_ctx->vf_stats->tx_dropped); | |
518 | } | |
519 | ||
520 | return rc; | |
521 | } | |
522 | ||
351e1581 | 523 | static int netvsc_xmit(struct sk_buff *skb, struct net_device *net, bool xdp_tx) |
fceaf24a | 524 | { |
fceaf24a | 525 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 526 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 527 | int ret; |
8a00251a KS |
528 | unsigned int num_data_pgs; |
529 | struct rndis_message *rndis_msg; | |
0c195567 | 530 | struct net_device *vf_netdev; |
8a00251a | 531 | u32 rndis_msg_size; |
307f0995 | 532 | u32 hash; |
02b6de01 | 533 | struct hv_page_buffer pb[MAX_PAGE_BUFFER_COUNT]; |
fceaf24a | 534 | |
0c195567 | 535 | /* if VF is present and up then redirect packets |
536 | * already called with rcu_read_lock_bh | |
537 | */ | |
538 | vf_netdev = rcu_dereference_bh(net_device_ctx->vf_netdev); | |
539 | if (vf_netdev && netif_running(vf_netdev) && | |
540 | !netpoll_tx_running(net)) | |
541 | return netvsc_vf_xmit(net, vf_netdev, skb); | |
542 | ||
80d887db | 543 | /* We will atmost need two pages to describe the rndis |
544 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
545 | * of pages in a single packet. If skb is scattered around |
546 | * more pages we try linearizing it. | |
54a7357f | 547 | */ |
80d887db | 548 | |
549 | num_data_pgs = netvsc_get_slots(skb) + 2; | |
550 | ||
0ab05141 | 551 | if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) { |
4323b47c SH |
552 | ++net_device_ctx->eth_stats.tx_scattered; |
553 | ||
554 | if (skb_linearize(skb)) | |
555 | goto no_memory; | |
0ab05141 | 556 | |
80d887db | 557 | num_data_pgs = netvsc_get_slots(skb) + 2; |
0ab05141 | 558 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
4323b47c | 559 | ++net_device_ctx->eth_stats.tx_too_big; |
0ab05141 SH |
560 | goto drop; |
561 | } | |
54a7357f | 562 | } |
fceaf24a | 563 | |
c0eb4540 KS |
564 | /* |
565 | * Place the rndis header in the skb head room and | |
566 | * the skb->cb will be used for hv_netvsc_packet | |
567 | * structure. | |
568 | */ | |
569 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
4323b47c SH |
570 | if (ret) |
571 | goto no_memory; | |
572 | ||
c0eb4540 KS |
573 | /* Use the skb control buffer for building up the packet */ |
574 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
c593642c | 575 | sizeof_field(struct sk_buff, cb)); |
c0eb4540 | 576 | packet = (struct hv_netvsc_packet *)skb->cb; |
fceaf24a | 577 | |
5b54dac8 HZ |
578 | packet->q_idx = skb_get_queue_mapping(skb); |
579 | ||
4d447c9a | 580 | packet->total_data_buflen = skb->len; |
793e3955 | 581 | packet->total_bytes = skb->len; |
582 | packet->total_packets = 1; | |
fceaf24a | 583 | |
c0eb4540 | 584 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 585 | |
8a00251a | 586 | /* Add the rndis header */ |
8a00251a KS |
587 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
588 | rndis_msg->msg_len = packet->total_data_buflen; | |
f5a22550 SH |
589 | |
590 | rndis_msg->msg.pkt = (struct rndis_packet) { | |
591 | .data_offset = sizeof(struct rndis_packet), | |
592 | .data_len = packet->total_data_buflen, | |
593 | .per_pkt_info_offset = sizeof(struct rndis_packet), | |
594 | }; | |
8a00251a KS |
595 | |
596 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
597 | ||
307f0995 HZ |
598 | hash = skb_get_hash_raw(skb); |
599 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
f5a22550 SH |
600 | u32 *hash_info; |
601 | ||
307f0995 | 602 | rndis_msg_size += NDIS_HASH_PPI_SIZE; |
f5a22550 SH |
603 | hash_info = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, |
604 | NBL_HASH_VALUE); | |
605 | *hash_info = hash; | |
307f0995 HZ |
606 | } |
607 | ||
0ab05141 | 608 | if (skb_vlan_tag_present(skb)) { |
8a00251a KS |
609 | struct ndis_pkt_8021q_info *vlan; |
610 | ||
611 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
f5a22550 SH |
612 | vlan = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, |
613 | IEEE_8021Q_INFO); | |
00f5024e | 614 | |
f5a22550 | 615 | vlan->value = 0; |
98ba780e MM |
616 | vlan->vlanid = skb_vlan_tag_get_id(skb); |
617 | vlan->cfi = skb_vlan_tag_get_cfi(skb); | |
618 | vlan->pri = skb_vlan_tag_get_prio(skb); | |
8a00251a KS |
619 | } |
620 | ||
23312a3b | 621 | if (skb_is_gso(skb)) { |
0ab05141 SH |
622 | struct ndis_tcp_lso_info *lso_info; |
623 | ||
624 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
f5a22550 SH |
625 | lso_info = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, |
626 | TCP_LARGESEND_PKTINFO); | |
0ab05141 | 627 | |
f5a22550 | 628 | lso_info->value = 0; |
0ab05141 | 629 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; |
23312a3b | 630 | if (skb->protocol == htons(ETH_P_IP)) { |
0ab05141 SH |
631 | lso_info->lso_v2_transmit.ip_version = |
632 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
633 | ip_hdr(skb)->tot_len = 0; | |
634 | ip_hdr(skb)->check = 0; | |
635 | tcp_hdr(skb)->check = | |
636 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
637 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
638 | } else { | |
639 | lso_info->lso_v2_transmit.ip_version = | |
640 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
1eb2c576 | 641 | tcp_v6_gso_csum_prep(skb); |
0ab05141 | 642 | } |
23312a3b | 643 | lso_info->lso_v2_transmit.tcp_header_offset = skb_transport_offset(skb); |
0ab05141 | 644 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; |
ad19bc8a | 645 | } else if (skb->ip_summed == CHECKSUM_PARTIAL) { |
23312a3b | 646 | if (net_checksum_info(skb) & net_device_ctx->tx_checksum_mask) { |
647 | struct ndis_tcp_ip_checksum_info *csum_info; | |
648 | ||
ad19bc8a | 649 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
f5a22550 SH |
650 | csum_info = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, |
651 | TCPIP_CHKSUM_PKTINFO); | |
ad19bc8a | 652 | |
f5a22550 | 653 | csum_info->value = 0; |
23312a3b | 654 | csum_info->transmit.tcp_header_offset = skb_transport_offset(skb); |
655 | ||
656 | if (skb->protocol == htons(ETH_P_IP)) { | |
ad19bc8a | 657 | csum_info->transmit.is_ipv4 = 1; |
23312a3b | 658 | |
659 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) | |
660 | csum_info->transmit.tcp_checksum = 1; | |
661 | else | |
662 | csum_info->transmit.udp_checksum = 1; | |
663 | } else { | |
ad19bc8a | 664 | csum_info->transmit.is_ipv6 = 1; |
665 | ||
23312a3b | 666 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
667 | csum_info->transmit.tcp_checksum = 1; | |
668 | else | |
669 | csum_info->transmit.udp_checksum = 1; | |
670 | } | |
ad19bc8a | 671 | } else { |
23312a3b | 672 | /* Can't do offload of this type of checksum */ |
ad19bc8a | 673 | if (skb_checksum_help(skb)) |
674 | goto drop; | |
675 | } | |
08cd04bf KS |
676 | } |
677 | ||
8a00251a KS |
678 | /* Start filling in the page buffers with the rndis hdr */ |
679 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 680 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 681 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
02b6de01 | 682 | skb, packet, pb); |
8a00251a | 683 | |
76d13b56 | 684 | /* timestamp packet in software */ |
685 | skb_tx_timestamp(skb); | |
2a926f79 | 686 | |
351e1581 | 687 | ret = netvsc_send(net, packet, rndis_msg, pb, skb, xdp_tx); |
793e3955 | 688 | if (likely(ret == 0)) |
0ab05141 | 689 | return NETDEV_TX_OK; |
4323b47c SH |
690 | |
691 | if (ret == -EAGAIN) { | |
692 | ++net_device_ctx->eth_stats.tx_busy; | |
0ab05141 | 693 | return NETDEV_TX_BUSY; |
4323b47c SH |
694 | } |
695 | ||
696 | if (ret == -ENOSPC) | |
697 | ++net_device_ctx->eth_stats.tx_no_space; | |
0ab05141 SH |
698 | |
699 | drop: | |
700 | dev_kfree_skb_any(skb); | |
701 | net->stats.tx_dropped++; | |
fceaf24a | 702 | |
0ab05141 | 703 | return NETDEV_TX_OK; |
4323b47c SH |
704 | |
705 | no_memory: | |
706 | ++net_device_ctx->eth_stats.tx_no_memory; | |
707 | goto drop; | |
fceaf24a | 708 | } |
89bb42b1 | 709 | |
7fdc66de NC |
710 | static netdev_tx_t netvsc_start_xmit(struct sk_buff *skb, |
711 | struct net_device *ndev) | |
351e1581 HZ |
712 | { |
713 | return netvsc_xmit(skb, ndev, false); | |
714 | } | |
715 | ||
3e189519 | 716 | /* |
02fafbc6 GKH |
717 | * netvsc_linkstatus_callback - Link up/down notification |
718 | */ | |
79cf1bae | 719 | void netvsc_linkstatus_callback(struct net_device *net, |
3a494e71 | 720 | struct rndis_message *resp) |
fceaf24a | 721 | { |
3a494e71 | 722 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
79cf1bae | 723 | struct net_device_context *ndev_ctx = netdev_priv(net); |
27a70af3 VK |
724 | struct netvsc_reconfig *event; |
725 | unsigned long flags; | |
891de74d | 726 | |
7f5d5af0 HZ |
727 | /* Update the physical link speed when changing to another vSwitch */ |
728 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { | |
729 | u32 speed; | |
730 | ||
89bb42b1 | 731 | speed = *(u32 *)((void *)indicate |
732 | + indicate->status_buf_offset) / 10000; | |
7f5d5af0 HZ |
733 | ndev_ctx->speed = speed; |
734 | return; | |
735 | } | |
736 | ||
737 | /* Handle these link change statuses below */ | |
27a70af3 VK |
738 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
739 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
740 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 741 | return; |
891de74d | 742 | |
7f5d5af0 | 743 | if (net->reg_state != NETREG_REGISTERED) |
fceaf24a | 744 | return; |
fceaf24a | 745 | |
27a70af3 VK |
746 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
747 | if (!event) | |
748 | return; | |
749 | event->event = indicate->status; | |
750 | ||
751 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
752 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
753 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
754 | ||
755 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
756 | } |
757 | ||
351e1581 HZ |
758 | static void netvsc_xdp_xmit(struct sk_buff *skb, struct net_device *ndev) |
759 | { | |
760 | int rc; | |
761 | ||
762 | skb->queue_mapping = skb_get_rx_queue(skb); | |
763 | __skb_push(skb, ETH_HLEN); | |
764 | ||
765 | rc = netvsc_xmit(skb, ndev, true); | |
766 | ||
767 | if (dev_xmit_complete(rc)) | |
768 | return; | |
769 | ||
770 | dev_kfree_skb_any(skb); | |
771 | ndev->stats.tx_dropped++; | |
772 | } | |
773 | ||
bf48648d HZ |
774 | static void netvsc_comp_ipcsum(struct sk_buff *skb) |
775 | { | |
776 | struct iphdr *iph = (struct iphdr *)skb->data; | |
777 | ||
778 | iph->check = 0; | |
779 | iph->check = ip_fast_csum(iph, iph->ihl); | |
780 | } | |
781 | ||
84bf9cef | 782 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
351e1581 HZ |
783 | struct netvsc_channel *nvchan, |
784 | struct xdp_buff *xdp) | |
fceaf24a | 785 | { |
c8e4eff4 HZ |
786 | struct napi_struct *napi = &nvchan->napi; |
787 | const struct ndis_pkt_8021q_info *vlan = nvchan->rsc.vlan; | |
788 | const struct ndis_tcp_ip_checksum_info *csum_info = | |
789 | nvchan->rsc.csum_info; | |
1fac7ca4 | 790 | const u32 *hash_info = nvchan->rsc.hash_info; |
fceaf24a | 791 | struct sk_buff *skb; |
351e1581 | 792 | void *xbuf = xdp->data_hard_start; |
c8e4eff4 | 793 | int i; |
fceaf24a | 794 | |
351e1581 HZ |
795 | if (xbuf) { |
796 | unsigned int hdroom = xdp->data - xdp->data_hard_start; | |
797 | unsigned int xlen = xdp->data_end - xdp->data; | |
798 | unsigned int frag_size = netvsc_xdp_fraglen(hdroom + xlen); | |
fceaf24a | 799 | |
351e1581 HZ |
800 | skb = build_skb(xbuf, frag_size); |
801 | ||
802 | if (!skb) { | |
803 | __free_page(virt_to_page(xbuf)); | |
804 | return NULL; | |
805 | } | |
806 | ||
807 | skb_reserve(skb, hdroom); | |
808 | skb_put(skb, xlen); | |
809 | skb->dev = napi->dev; | |
810 | } else { | |
811 | skb = napi_alloc_skb(napi, nvchan->rsc.pktlen); | |
812 | ||
813 | if (!skb) | |
814 | return NULL; | |
815 | ||
816 | /* Copy to skb. This copy is needed here since the memory | |
817 | * pointed by hv_netvsc_packet cannot be deallocated. | |
818 | */ | |
819 | for (i = 0; i < nvchan->rsc.cnt; i++) | |
820 | skb_put_data(skb, nvchan->rsc.data[i], | |
821 | nvchan->rsc.len[i]); | |
822 | } | |
fceaf24a HJ |
823 | |
824 | skb->protocol = eth_type_trans(skb, net); | |
e52fed71 SH |
825 | |
826 | /* skb is already created with CHECKSUM_NONE */ | |
827 | skb_checksum_none_assert(skb); | |
828 | ||
bf48648d HZ |
829 | /* Incoming packets may have IP header checksum verified by the host. |
830 | * They may not have IP header checksum computed after coalescing. | |
831 | * We compute it here if the flags are set, because on Linux, the IP | |
832 | * checksum is always checked. | |
833 | */ | |
834 | if (csum_info && csum_info->receive.ip_checksum_value_invalid && | |
835 | csum_info->receive.ip_checksum_succeeded && | |
836 | skb->protocol == htons(ETH_P_IP)) | |
837 | netvsc_comp_ipcsum(skb); | |
838 | ||
df9f540c | 839 | /* Do L4 checksum offload if enabled and present. */ |
e52fed71 SH |
840 | if (csum_info && (net->features & NETIF_F_RXCSUM)) { |
841 | if (csum_info->receive.tcp_checksum_succeeded || | |
842 | csum_info->receive.udp_checksum_succeeded) | |
e3d605ed | 843 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
e3d605ed KS |
844 | } |
845 | ||
6f3aeb1b | 846 | if (hash_info && (net->features & NETIF_F_RXHASH)) |
1fac7ca4 SH |
847 | skb_set_hash(skb, *hash_info, PKT_HASH_TYPE_L4); |
848 | ||
dc54a08c | 849 | if (vlan) { |
98ba780e MM |
850 | u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT) | |
851 | (vlan->cfi ? VLAN_CFI_MASK : 0); | |
dc54a08c | 852 | |
93725cbd | 853 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 854 | vlan_tci); |
dc54a08c | 855 | } |
fceaf24a | 856 | |
84bf9cef KS |
857 | return skb; |
858 | } | |
859 | ||
860 | /* | |
861 | * netvsc_recv_callback - Callback when we receive a packet from the | |
862 | * "wire" on the specified device. | |
863 | */ | |
dc54a08c | 864 | int netvsc_recv_callback(struct net_device *net, |
345ac089 | 865 | struct netvsc_device *net_device, |
c8e4eff4 | 866 | struct netvsc_channel *nvchan) |
84bf9cef | 867 | { |
3d541ac5 | 868 | struct net_device_context *net_device_ctx = netdev_priv(net); |
c8e4eff4 | 869 | struct vmbus_channel *channel = nvchan->channel; |
742fe54c | 870 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
84bf9cef | 871 | struct sk_buff *skb; |
351e1581 HZ |
872 | struct netvsc_stats *rx_stats = &nvchan->rx_stats; |
873 | struct xdp_buff xdp; | |
874 | u32 act; | |
84bf9cef | 875 | |
9cbcc428 | 876 | if (net->reg_state != NETREG_REGISTERED) |
84bf9cef KS |
877 | return NVSP_STAT_FAIL; |
878 | ||
351e1581 HZ |
879 | act = netvsc_run_xdp(net, nvchan, &xdp); |
880 | ||
881 | if (act != XDP_PASS && act != XDP_TX) { | |
882 | u64_stats_update_begin(&rx_stats->syncp); | |
883 | rx_stats->xdp_drop++; | |
884 | u64_stats_update_end(&rx_stats->syncp); | |
885 | ||
886 | return NVSP_STAT_SUCCESS; /* consumed by XDP */ | |
887 | } | |
888 | ||
84bf9cef | 889 | /* Allocate a skb - TODO direct I/O to pages? */ |
351e1581 | 890 | skb = netvsc_alloc_recv_skb(net, nvchan, &xdp); |
c8e4eff4 | 891 | |
84bf9cef | 892 | if (unlikely(!skb)) { |
f61a9d62 | 893 | ++net_device_ctx->eth_stats.rx_no_memory; |
84bf9cef KS |
894 | return NVSP_STAT_FAIL; |
895 | } | |
5b54dac8 | 896 | |
0c195567 | 897 | skb_record_rx_queue(skb, q_idx); |
9cbcc428 SH |
898 | |
899 | /* | |
900 | * Even if injecting the packet, record the statistics | |
901 | * on the synthetic device because modifying the VF device | |
902 | * statistics will not work correctly. | |
903 | */ | |
4b02b58b | 904 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 905 | rx_stats->packets++; |
c8e4eff4 | 906 | rx_stats->bytes += nvchan->rsc.pktlen; |
f7ad75b7 SH |
907 | |
908 | if (skb->pkt_type == PACKET_BROADCAST) | |
909 | ++rx_stats->broadcast; | |
910 | else if (skb->pkt_type == PACKET_MULTICAST) | |
911 | ++rx_stats->multicast; | |
4b02b58b | 912 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 913 | |
351e1581 HZ |
914 | if (act == XDP_TX) { |
915 | netvsc_xdp_xmit(skb, net); | |
916 | return NVSP_STAT_SUCCESS; | |
917 | } | |
918 | ||
742fe54c | 919 | napi_gro_receive(&nvchan->napi, skb); |
5c71dadb | 920 | return NVSP_STAT_SUCCESS; |
fceaf24a HJ |
921 | } |
922 | ||
f82f4ad7 SH |
923 | static void netvsc_get_drvinfo(struct net_device *net, |
924 | struct ethtool_drvinfo *info) | |
925 | { | |
7826d43f | 926 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 927 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
928 | } |
929 | ||
59995370 AS |
930 | static void netvsc_get_channels(struct net_device *net, |
931 | struct ethtool_channels *channel) | |
932 | { | |
933 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
545a8e79 | 934 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
59995370 AS |
935 | |
936 | if (nvdev) { | |
937 | channel->max_combined = nvdev->max_chn; | |
938 | channel->combined_count = nvdev->num_chn; | |
939 | } | |
940 | } | |
941 | ||
7c9f335a HZ |
942 | /* Alloc struct netvsc_device_info, and initialize it from either existing |
943 | * struct netvsc_device, or from default values. | |
944 | */ | |
351e1581 HZ |
945 | static |
946 | struct netvsc_device_info *netvsc_devinfo_get(struct netvsc_device *nvdev) | |
7c9f335a HZ |
947 | { |
948 | struct netvsc_device_info *dev_info; | |
351e1581 | 949 | struct bpf_prog *prog; |
7c9f335a HZ |
950 | |
951 | dev_info = kzalloc(sizeof(*dev_info), GFP_ATOMIC); | |
952 | ||
953 | if (!dev_info) | |
954 | return NULL; | |
955 | ||
956 | if (nvdev) { | |
351e1581 HZ |
957 | ASSERT_RTNL(); |
958 | ||
7c9f335a HZ |
959 | dev_info->num_chn = nvdev->num_chn; |
960 | dev_info->send_sections = nvdev->send_section_cnt; | |
961 | dev_info->send_section_size = nvdev->send_section_size; | |
962 | dev_info->recv_sections = nvdev->recv_section_cnt; | |
963 | dev_info->recv_section_size = nvdev->recv_section_size; | |
17d91256 HZ |
964 | |
965 | memcpy(dev_info->rss_key, nvdev->extension->rss_key, | |
966 | NETVSC_HASH_KEYLEN); | |
351e1581 HZ |
967 | |
968 | prog = netvsc_xdp_get(nvdev); | |
969 | if (prog) { | |
970 | bpf_prog_inc(prog); | |
971 | dev_info->bprog = prog; | |
972 | } | |
7c9f335a HZ |
973 | } else { |
974 | dev_info->num_chn = VRSS_CHANNEL_DEFAULT; | |
975 | dev_info->send_sections = NETVSC_DEFAULT_TX; | |
976 | dev_info->send_section_size = NETVSC_SEND_SECTION_SIZE; | |
977 | dev_info->recv_sections = NETVSC_DEFAULT_RX; | |
978 | dev_info->recv_section_size = NETVSC_RECV_SECTION_SIZE; | |
979 | } | |
980 | ||
981 | return dev_info; | |
982 | } | |
983 | ||
351e1581 HZ |
984 | /* Free struct netvsc_device_info */ |
985 | static void netvsc_devinfo_put(struct netvsc_device_info *dev_info) | |
986 | { | |
987 | if (dev_info->bprog) { | |
988 | ASSERT_RTNL(); | |
989 | bpf_prog_put(dev_info->bprog); | |
990 | } | |
991 | ||
992 | kfree(dev_info); | |
993 | } | |
994 | ||
7b2ee50c SH |
995 | static int netvsc_detach(struct net_device *ndev, |
996 | struct netvsc_device *nvdev) | |
997 | { | |
998 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
999 | struct hv_device *hdev = ndev_ctx->device_ctx; | |
1000 | int ret; | |
1001 | ||
1002 | /* Don't try continuing to try and setup sub channels */ | |
1003 | if (cancel_work_sync(&nvdev->subchan_work)) | |
1004 | nvdev->num_chn = 1; | |
1005 | ||
351e1581 HZ |
1006 | netvsc_xdp_set(ndev, NULL, NULL, nvdev); |
1007 | ||
7b2ee50c SH |
1008 | /* If device was up (receiving) then shutdown */ |
1009 | if (netif_running(ndev)) { | |
1b704c4a | 1010 | netvsc_tx_disable(nvdev, ndev); |
7b2ee50c SH |
1011 | |
1012 | ret = rndis_filter_close(nvdev); | |
1013 | if (ret) { | |
1014 | netdev_err(ndev, | |
1015 | "unable to close device (ret %d).\n", ret); | |
1016 | return ret; | |
1017 | } | |
1018 | ||
1019 | ret = netvsc_wait_until_empty(nvdev); | |
1020 | if (ret) { | |
1021 | netdev_err(ndev, | |
1022 | "Ring buffer not empty after closing rndis\n"); | |
1023 | return ret; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | netif_device_detach(ndev); | |
1028 | ||
1029 | rndis_filter_device_remove(hdev, nvdev); | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | static int netvsc_attach(struct net_device *ndev, | |
1035 | struct netvsc_device_info *dev_info) | |
1036 | { | |
1037 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
1038 | struct hv_device *hdev = ndev_ctx->device_ctx; | |
1039 | struct netvsc_device *nvdev; | |
1040 | struct rndis_device *rdev; | |
351e1581 HZ |
1041 | struct bpf_prog *prog; |
1042 | int ret = 0; | |
7b2ee50c SH |
1043 | |
1044 | nvdev = rndis_filter_device_add(hdev, dev_info); | |
1045 | if (IS_ERR(nvdev)) | |
1046 | return PTR_ERR(nvdev); | |
1047 | ||
3ffe64f1 | 1048 | if (nvdev->num_chn > 1) { |
17d91256 | 1049 | ret = rndis_set_subchannel(ndev, nvdev, dev_info); |
3ffe64f1 SH |
1050 | |
1051 | /* if unavailable, just proceed with one queue */ | |
1052 | if (ret) { | |
1053 | nvdev->max_chn = 1; | |
1054 | nvdev->num_chn = 1; | |
1055 | } | |
1056 | } | |
1057 | ||
351e1581 HZ |
1058 | prog = dev_info->bprog; |
1059 | if (prog) { | |
184367dc | 1060 | bpf_prog_inc(prog); |
351e1581 | 1061 | ret = netvsc_xdp_set(ndev, prog, NULL, nvdev); |
184367dc HZ |
1062 | if (ret) { |
1063 | bpf_prog_put(prog); | |
351e1581 | 1064 | goto err1; |
184367dc | 1065 | } |
351e1581 HZ |
1066 | } |
1067 | ||
3ffe64f1 | 1068 | /* In any case device is now ready */ |
f6f13c12 | 1069 | nvdev->tx_disable = false; |
3ffe64f1 | 1070 | netif_device_attach(ndev); |
7b2ee50c | 1071 | |
3ffe64f1 | 1072 | /* Note: enable and attach happen when sub-channels setup */ |
7b2ee50c SH |
1073 | netif_carrier_off(ndev); |
1074 | ||
1075 | if (netif_running(ndev)) { | |
1076 | ret = rndis_filter_open(nvdev); | |
1077 | if (ret) | |
351e1581 | 1078 | goto err2; |
7b2ee50c SH |
1079 | |
1080 | rdev = nvdev->extension; | |
1081 | if (!rdev->link_state) | |
1082 | netif_carrier_on(ndev); | |
1083 | } | |
1084 | ||
1085 | return 0; | |
719b85c3 | 1086 | |
351e1581 | 1087 | err2: |
719b85c3 HZ |
1088 | netif_device_detach(ndev); |
1089 | ||
351e1581 | 1090 | err1: |
719b85c3 HZ |
1091 | rndis_filter_device_remove(hdev, nvdev); |
1092 | ||
1093 | return ret; | |
7b2ee50c SH |
1094 | } |
1095 | ||
b5960e6e AS |
1096 | static int netvsc_set_channels(struct net_device *net, |
1097 | struct ethtool_channels *channels) | |
1098 | { | |
1099 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
545a8e79 | 1100 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
7ca45933 | 1101 | unsigned int orig, count = channels->combined_count; |
7c9f335a | 1102 | struct netvsc_device_info *device_info; |
7b2ee50c | 1103 | int ret; |
2b01888d | 1104 | |
1105 | /* We do not support separate count for rx, tx, or other */ | |
1106 | if (count == 0 || | |
1107 | channels->rx_count || channels->tx_count || channels->other_count) | |
1108 | return -EINVAL; | |
1109 | ||
a0be450e | 1110 | if (!nvdev || nvdev->destroy) |
b5960e6e AS |
1111 | return -ENODEV; |
1112 | ||
2b01888d | 1113 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) |
b5960e6e | 1114 | return -EINVAL; |
b5960e6e | 1115 | |
2b01888d | 1116 | if (count > nvdev->max_chn) |
b5960e6e AS |
1117 | return -EINVAL; |
1118 | ||
7ca45933 | 1119 | orig = nvdev->num_chn; |
b5960e6e | 1120 | |
7c9f335a HZ |
1121 | device_info = netvsc_devinfo_get(nvdev); |
1122 | ||
1123 | if (!device_info) | |
1124 | return -ENOMEM; | |
1125 | ||
1126 | device_info->num_chn = count; | |
8b532797 | 1127 | |
7b2ee50c SH |
1128 | ret = netvsc_detach(net, nvdev); |
1129 | if (ret) | |
7c9f335a | 1130 | goto out; |
7ca45933 | 1131 | |
7c9f335a | 1132 | ret = netvsc_attach(net, device_info); |
7b2ee50c | 1133 | if (ret) { |
7c9f335a HZ |
1134 | device_info->num_chn = orig; |
1135 | if (netvsc_attach(net, device_info)) | |
7b2ee50c | 1136 | netdev_err(net, "restoring channel setting failed\n"); |
7ca45933 | 1137 | } |
b5960e6e | 1138 | |
7c9f335a | 1139 | out: |
351e1581 | 1140 | netvsc_devinfo_put(device_info); |
b5960e6e | 1141 | return ret; |
b5960e6e AS |
1142 | } |
1143 | ||
49eb9389 | 1144 | static void netvsc_init_settings(struct net_device *dev) |
1145 | { | |
1146 | struct net_device_context *ndc = netdev_priv(dev); | |
1147 | ||
486e3981 | 1148 | ndc->l4_hash = HV_DEFAULT_L4HASH; |
4823eb2f | 1149 | |
49eb9389 | 1150 | ndc->speed = SPEED_UNKNOWN; |
f3c9d40e | 1151 | ndc->duplex = DUPLEX_FULL; |
d6792a5a HZ |
1152 | |
1153 | dev->features = NETIF_F_LRO; | |
49eb9389 | 1154 | } |
1155 | ||
5e8456fd PR |
1156 | static int netvsc_get_link_ksettings(struct net_device *dev, |
1157 | struct ethtool_link_ksettings *cmd) | |
49eb9389 | 1158 | { |
1159 | struct net_device_context *ndc = netdev_priv(dev); | |
9aedc6e2 CF |
1160 | struct net_device *vf_netdev; |
1161 | ||
1162 | vf_netdev = rtnl_dereference(ndc->vf_netdev); | |
1163 | ||
1164 | if (vf_netdev) | |
1165 | return __ethtool_get_link_ksettings(vf_netdev, cmd); | |
49eb9389 | 1166 | |
5e8456fd PR |
1167 | cmd->base.speed = ndc->speed; |
1168 | cmd->base.duplex = ndc->duplex; | |
1169 | cmd->base.port = PORT_OTHER; | |
49eb9389 | 1170 | |
1171 | return 0; | |
1172 | } | |
1173 | ||
5e8456fd PR |
1174 | static int netvsc_set_link_ksettings(struct net_device *dev, |
1175 | const struct ethtool_link_ksettings *cmd) | |
49eb9389 | 1176 | { |
1177 | struct net_device_context *ndc = netdev_priv(dev); | |
9aedc6e2 | 1178 | struct net_device *vf_netdev = rtnl_dereference(ndc->vf_netdev); |
49eb9389 | 1179 | |
9aedc6e2 CF |
1180 | if (vf_netdev) { |
1181 | if (!vf_netdev->ethtool_ops->set_link_ksettings) | |
1182 | return -EOPNOTSUPP; | |
49eb9389 | 1183 | |
9aedc6e2 CF |
1184 | return vf_netdev->ethtool_ops->set_link_ksettings(vf_netdev, |
1185 | cmd); | |
1186 | } | |
49eb9389 | 1187 | |
9aedc6e2 CF |
1188 | return ethtool_virtdev_set_link_ksettings(dev, cmd, |
1189 | &ndc->speed, &ndc->duplex); | |
49eb9389 | 1190 | } |
1191 | ||
4d447c9a HZ |
1192 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
1193 | { | |
1194 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
0c195567 | 1195 | struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev); |
545a8e79 | 1196 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
9749fed5 | 1197 | int orig_mtu = ndev->mtu; |
7c9f335a | 1198 | struct netvsc_device_info *device_info; |
9749fed5 | 1199 | int ret = 0; |
4d447c9a | 1200 | |
a0be450e | 1201 | if (!nvdev || nvdev->destroy) |
4d447c9a HZ |
1202 | return -ENODEV; |
1203 | ||
7c9f335a HZ |
1204 | device_info = netvsc_devinfo_get(nvdev); |
1205 | ||
1206 | if (!device_info) | |
1207 | return -ENOMEM; | |
1208 | ||
0c195567 | 1209 | /* Change MTU of underlying VF netdev first. */ |
1210 | if (vf_netdev) { | |
1211 | ret = dev_set_mtu(vf_netdev, mtu); | |
1212 | if (ret) | |
7c9f335a | 1213 | goto out; |
0c195567 | 1214 | } |
1215 | ||
7b2ee50c SH |
1216 | ret = netvsc_detach(ndev, nvdev); |
1217 | if (ret) | |
1218 | goto rollback_vf; | |
4d447c9a HZ |
1219 | |
1220 | ndev->mtu = mtu; | |
1221 | ||
7c9f335a HZ |
1222 | ret = netvsc_attach(ndev, device_info); |
1223 | if (!ret) | |
1224 | goto out; | |
ea383bf1 | 1225 | |
7b2ee50c SH |
1226 | /* Attempt rollback to original MTU */ |
1227 | ndev->mtu = orig_mtu; | |
163891d7 | 1228 | |
7c9f335a | 1229 | if (netvsc_attach(ndev, device_info)) |
7b2ee50c SH |
1230 | netdev_err(ndev, "restoring mtu failed\n"); |
1231 | rollback_vf: | |
1232 | if (vf_netdev) | |
1233 | dev_set_mtu(vf_netdev, orig_mtu); | |
1bdcec8a | 1234 | |
7c9f335a | 1235 | out: |
351e1581 | 1236 | netvsc_devinfo_put(device_info); |
9749fed5 | 1237 | return ret; |
4d447c9a HZ |
1238 | } |
1239 | ||
0c195567 | 1240 | static void netvsc_get_vf_stats(struct net_device *net, |
1241 | struct netvsc_vf_pcpu_stats *tot) | |
1242 | { | |
1243 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
1244 | int i; | |
1245 | ||
1246 | memset(tot, 0, sizeof(*tot)); | |
1247 | ||
1248 | for_each_possible_cpu(i) { | |
1249 | const struct netvsc_vf_pcpu_stats *stats | |
1250 | = per_cpu_ptr(ndev_ctx->vf_stats, i); | |
1251 | u64 rx_packets, rx_bytes, tx_packets, tx_bytes; | |
1252 | unsigned int start; | |
1253 | ||
1254 | do { | |
1255 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
1256 | rx_packets = stats->rx_packets; | |
1257 | tx_packets = stats->tx_packets; | |
1258 | rx_bytes = stats->rx_bytes; | |
1259 | tx_bytes = stats->tx_bytes; | |
1260 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1261 | ||
1262 | tot->rx_packets += rx_packets; | |
1263 | tot->tx_packets += tx_packets; | |
1264 | tot->rx_bytes += rx_bytes; | |
1265 | tot->tx_bytes += tx_bytes; | |
1266 | tot->tx_dropped += stats->tx_dropped; | |
1267 | } | |
1268 | } | |
1269 | ||
6ae74671 YR |
1270 | static void netvsc_get_pcpu_stats(struct net_device *net, |
1271 | struct netvsc_ethtool_pcpu_stats *pcpu_tot) | |
1272 | { | |
1273 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
1274 | struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev); | |
1275 | int i; | |
1276 | ||
1277 | /* fetch percpu stats of vf */ | |
1278 | for_each_possible_cpu(i) { | |
1279 | const struct netvsc_vf_pcpu_stats *stats = | |
1280 | per_cpu_ptr(ndev_ctx->vf_stats, i); | |
1281 | struct netvsc_ethtool_pcpu_stats *this_tot = &pcpu_tot[i]; | |
1282 | unsigned int start; | |
1283 | ||
1284 | do { | |
1285 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
1286 | this_tot->vf_rx_packets = stats->rx_packets; | |
1287 | this_tot->vf_tx_packets = stats->tx_packets; | |
1288 | this_tot->vf_rx_bytes = stats->rx_bytes; | |
1289 | this_tot->vf_tx_bytes = stats->tx_bytes; | |
1290 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1291 | this_tot->rx_packets = this_tot->vf_rx_packets; | |
1292 | this_tot->tx_packets = this_tot->vf_tx_packets; | |
1293 | this_tot->rx_bytes = this_tot->vf_rx_bytes; | |
1294 | this_tot->tx_bytes = this_tot->vf_tx_bytes; | |
1295 | } | |
1296 | ||
1297 | /* fetch percpu stats of netvsc */ | |
1298 | for (i = 0; i < nvdev->num_chn; i++) { | |
1299 | const struct netvsc_channel *nvchan = &nvdev->chan_table[i]; | |
1300 | const struct netvsc_stats *stats; | |
1301 | struct netvsc_ethtool_pcpu_stats *this_tot = | |
1302 | &pcpu_tot[nvchan->channel->target_cpu]; | |
1303 | u64 packets, bytes; | |
1304 | unsigned int start; | |
1305 | ||
1306 | stats = &nvchan->tx_stats; | |
1307 | do { | |
1308 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
1309 | packets = stats->packets; | |
1310 | bytes = stats->bytes; | |
1311 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1312 | ||
1313 | this_tot->tx_bytes += bytes; | |
1314 | this_tot->tx_packets += packets; | |
1315 | ||
1316 | stats = &nvchan->rx_stats; | |
1317 | do { | |
1318 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
1319 | packets = stats->packets; | |
1320 | bytes = stats->bytes; | |
1321 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1322 | ||
1323 | this_tot->rx_bytes += bytes; | |
1324 | this_tot->rx_packets += packets; | |
1325 | } | |
1326 | } | |
1327 | ||
bc1f4470 | 1328 | static void netvsc_get_stats64(struct net_device *net, |
1329 | struct rtnl_link_stats64 *t) | |
7eafd9b4 | 1330 | { |
1331 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
6d0d779d | 1332 | struct netvsc_device *nvdev; |
0c195567 | 1333 | struct netvsc_vf_pcpu_stats vf_tot; |
89bb42b1 | 1334 | int i; |
6c80f3fc | 1335 | |
6d0d779d DC |
1336 | rcu_read_lock(); |
1337 | ||
1338 | nvdev = rcu_dereference(ndev_ctx->nvdev); | |
6c80f3fc | 1339 | if (!nvdev) |
6d0d779d | 1340 | goto out; |
6c80f3fc | 1341 | |
0c195567 | 1342 | netdev_stats_to_stats64(t, &net->stats); |
1343 | ||
1344 | netvsc_get_vf_stats(net, &vf_tot); | |
1345 | t->rx_packets += vf_tot.rx_packets; | |
1346 | t->tx_packets += vf_tot.tx_packets; | |
1347 | t->rx_bytes += vf_tot.rx_bytes; | |
1348 | t->tx_bytes += vf_tot.tx_bytes; | |
1349 | t->tx_dropped += vf_tot.tx_dropped; | |
1350 | ||
6c80f3fc SX |
1351 | for (i = 0; i < nvdev->num_chn; i++) { |
1352 | const struct netvsc_channel *nvchan = &nvdev->chan_table[i]; | |
1353 | const struct netvsc_stats *stats; | |
1354 | u64 packets, bytes, multicast; | |
7eafd9b4 | 1355 | unsigned int start; |
1356 | ||
6c80f3fc | 1357 | stats = &nvchan->tx_stats; |
7eafd9b4 | 1358 | do { |
6c80f3fc SX |
1359 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
1360 | packets = stats->packets; | |
1361 | bytes = stats->bytes; | |
1362 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1363 | ||
1364 | t->tx_bytes += bytes; | |
1365 | t->tx_packets += packets; | |
7eafd9b4 | 1366 | |
6c80f3fc | 1367 | stats = &nvchan->rx_stats; |
7eafd9b4 | 1368 | do { |
6c80f3fc SX |
1369 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
1370 | packets = stats->packets; | |
1371 | bytes = stats->bytes; | |
1372 | multicast = stats->multicast + stats->broadcast; | |
1373 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1374 | ||
1375 | t->rx_bytes += bytes; | |
1376 | t->rx_packets += packets; | |
1377 | t->multicast += multicast; | |
7eafd9b4 | 1378 | } |
6d0d779d DC |
1379 | out: |
1380 | rcu_read_unlock(); | |
7eafd9b4 | 1381 | } |
1ce09e89 HZ |
1382 | |
1383 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
1384 | { | |
867047c4 | 1385 | struct net_device_context *ndc = netdev_priv(ndev); |
16ba3266 | 1386 | struct net_device *vf_netdev = rtnl_dereference(ndc->vf_netdev); |
867047c4 | 1387 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
1ce09e89 | 1388 | struct sockaddr *addr = p; |
1ce09e89 HZ |
1389 | int err; |
1390 | ||
16ba3266 | 1391 | err = eth_prepare_mac_addr_change(ndev, p); |
1392 | if (err) | |
1ce09e89 HZ |
1393 | return err; |
1394 | ||
867047c4 | 1395 | if (!nvdev) |
1396 | return -ENODEV; | |
1397 | ||
16ba3266 | 1398 | if (vf_netdev) { |
3a37a963 | 1399 | err = dev_set_mac_address(vf_netdev, addr, NULL); |
16ba3266 | 1400 | if (err) |
1401 | return err; | |
1402 | } | |
1403 | ||
867047c4 | 1404 | err = rndis_filter_set_device_mac(nvdev, addr->sa_data); |
16ba3266 | 1405 | if (!err) { |
1406 | eth_commit_mac_addr_change(ndev, p); | |
1407 | } else if (vf_netdev) { | |
1408 | /* rollback change on VF */ | |
1409 | memcpy(addr->sa_data, ndev->dev_addr, ETH_ALEN); | |
3a37a963 | 1410 | dev_set_mac_address(vf_netdev, addr, NULL); |
1ce09e89 HZ |
1411 | } |
1412 | ||
1413 | return err; | |
1414 | } | |
1415 | ||
4323b47c SH |
1416 | static const struct { |
1417 | char name[ETH_GSTRING_LEN]; | |
1418 | u16 offset; | |
1419 | } netvsc_stats[] = { | |
1420 | { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, | |
f61a9d62 | 1421 | { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, |
4323b47c SH |
1422 | { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, |
1423 | { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, | |
1424 | { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, | |
cad5c197 | 1425 | { "tx_send_full", offsetof(struct netvsc_ethtool_stats, tx_send_full) }, |
1426 | { "rx_comp_busy", offsetof(struct netvsc_ethtool_stats, rx_comp_busy) }, | |
f61a9d62 | 1427 | { "rx_no_memory", offsetof(struct netvsc_ethtool_stats, rx_no_memory) }, |
09af87d1 SX |
1428 | { "stop_queue", offsetof(struct netvsc_ethtool_stats, stop_queue) }, |
1429 | { "wake_queue", offsetof(struct netvsc_ethtool_stats, wake_queue) }, | |
6ae74671 YR |
1430 | }, pcpu_stats[] = { |
1431 | { "cpu%u_rx_packets", | |
1432 | offsetof(struct netvsc_ethtool_pcpu_stats, rx_packets) }, | |
1433 | { "cpu%u_rx_bytes", | |
1434 | offsetof(struct netvsc_ethtool_pcpu_stats, rx_bytes) }, | |
1435 | { "cpu%u_tx_packets", | |
1436 | offsetof(struct netvsc_ethtool_pcpu_stats, tx_packets) }, | |
1437 | { "cpu%u_tx_bytes", | |
1438 | offsetof(struct netvsc_ethtool_pcpu_stats, tx_bytes) }, | |
1439 | { "cpu%u_vf_rx_packets", | |
1440 | offsetof(struct netvsc_ethtool_pcpu_stats, vf_rx_packets) }, | |
1441 | { "cpu%u_vf_rx_bytes", | |
1442 | offsetof(struct netvsc_ethtool_pcpu_stats, vf_rx_bytes) }, | |
1443 | { "cpu%u_vf_tx_packets", | |
1444 | offsetof(struct netvsc_ethtool_pcpu_stats, vf_tx_packets) }, | |
1445 | { "cpu%u_vf_tx_bytes", | |
1446 | offsetof(struct netvsc_ethtool_pcpu_stats, vf_tx_bytes) }, | |
0c195567 | 1447 | }, vf_stats[] = { |
1448 | { "vf_rx_packets", offsetof(struct netvsc_vf_pcpu_stats, rx_packets) }, | |
1449 | { "vf_rx_bytes", offsetof(struct netvsc_vf_pcpu_stats, rx_bytes) }, | |
1450 | { "vf_tx_packets", offsetof(struct netvsc_vf_pcpu_stats, tx_packets) }, | |
1451 | { "vf_tx_bytes", offsetof(struct netvsc_vf_pcpu_stats, tx_bytes) }, | |
1452 | { "vf_tx_dropped", offsetof(struct netvsc_vf_pcpu_stats, tx_dropped) }, | |
4323b47c SH |
1453 | }; |
1454 | ||
6c80f3fc | 1455 | #define NETVSC_GLOBAL_STATS_LEN ARRAY_SIZE(netvsc_stats) |
0c195567 | 1456 | #define NETVSC_VF_STATS_LEN ARRAY_SIZE(vf_stats) |
6c80f3fc | 1457 | |
6ae74671 YR |
1458 | /* statistics per queue (rx/tx packets/bytes) */ |
1459 | #define NETVSC_PCPU_STATS_LEN (num_present_cpus() * ARRAY_SIZE(pcpu_stats)) | |
1460 | ||
351e1581 HZ |
1461 | /* 5 statistics per queue (rx/tx packets/bytes, rx xdp_drop) */ |
1462 | #define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 5) | |
6c80f3fc | 1463 | |
4323b47c SH |
1464 | static int netvsc_get_sset_count(struct net_device *dev, int string_set) |
1465 | { | |
6c80f3fc | 1466 | struct net_device_context *ndc = netdev_priv(dev); |
fbd4c7e7 | 1467 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
545a8e79 | 1468 | |
1469 | if (!nvdev) | |
1470 | return -ENODEV; | |
6c80f3fc | 1471 | |
4323b47c SH |
1472 | switch (string_set) { |
1473 | case ETH_SS_STATS: | |
0c195567 | 1474 | return NETVSC_GLOBAL_STATS_LEN |
1475 | + NETVSC_VF_STATS_LEN | |
6ae74671 YR |
1476 | + NETVSC_QUEUE_STATS_LEN(nvdev) |
1477 | + NETVSC_PCPU_STATS_LEN; | |
4323b47c SH |
1478 | default: |
1479 | return -EINVAL; | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | static void netvsc_get_ethtool_stats(struct net_device *dev, | |
1484 | struct ethtool_stats *stats, u64 *data) | |
1485 | { | |
1486 | struct net_device_context *ndc = netdev_priv(dev); | |
867047c4 | 1487 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
4323b47c | 1488 | const void *nds = &ndc->eth_stats; |
6c80f3fc | 1489 | const struct netvsc_stats *qstats; |
0c195567 | 1490 | struct netvsc_vf_pcpu_stats sum; |
6ae74671 | 1491 | struct netvsc_ethtool_pcpu_stats *pcpu_sum; |
6c80f3fc SX |
1492 | unsigned int start; |
1493 | u64 packets, bytes; | |
351e1581 | 1494 | u64 xdp_drop; |
6ae74671 | 1495 | int i, j, cpu; |
4323b47c | 1496 | |
545a8e79 | 1497 | if (!nvdev) |
1498 | return; | |
1499 | ||
6c80f3fc | 1500 | for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++) |
4323b47c | 1501 | data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); |
6c80f3fc | 1502 | |
0c195567 | 1503 | netvsc_get_vf_stats(dev, &sum); |
1504 | for (j = 0; j < NETVSC_VF_STATS_LEN; j++) | |
1505 | data[i++] = *(u64 *)((void *)&sum + vf_stats[j].offset); | |
1506 | ||
6c80f3fc SX |
1507 | for (j = 0; j < nvdev->num_chn; j++) { |
1508 | qstats = &nvdev->chan_table[j].tx_stats; | |
1509 | ||
1510 | do { | |
1511 | start = u64_stats_fetch_begin_irq(&qstats->syncp); | |
1512 | packets = qstats->packets; | |
1513 | bytes = qstats->bytes; | |
1514 | } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); | |
1515 | data[i++] = packets; | |
1516 | data[i++] = bytes; | |
1517 | ||
1518 | qstats = &nvdev->chan_table[j].rx_stats; | |
1519 | do { | |
1520 | start = u64_stats_fetch_begin_irq(&qstats->syncp); | |
1521 | packets = qstats->packets; | |
1522 | bytes = qstats->bytes; | |
351e1581 | 1523 | xdp_drop = qstats->xdp_drop; |
6c80f3fc SX |
1524 | } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); |
1525 | data[i++] = packets; | |
1526 | data[i++] = bytes; | |
351e1581 | 1527 | data[i++] = xdp_drop; |
6c80f3fc | 1528 | } |
6ae74671 YR |
1529 | |
1530 | pcpu_sum = kvmalloc_array(num_possible_cpus(), | |
1531 | sizeof(struct netvsc_ethtool_pcpu_stats), | |
1532 | GFP_KERNEL); | |
1533 | netvsc_get_pcpu_stats(dev, pcpu_sum); | |
1534 | for_each_present_cpu(cpu) { | |
1535 | struct netvsc_ethtool_pcpu_stats *this_sum = &pcpu_sum[cpu]; | |
1536 | ||
1537 | for (j = 0; j < ARRAY_SIZE(pcpu_stats); j++) | |
1538 | data[i++] = *(u64 *)((void *)this_sum | |
1539 | + pcpu_stats[j].offset); | |
1540 | } | |
1541 | kvfree(pcpu_sum); | |
4323b47c SH |
1542 | } |
1543 | ||
1544 | static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1545 | { | |
6c80f3fc | 1546 | struct net_device_context *ndc = netdev_priv(dev); |
867047c4 | 1547 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
6c80f3fc | 1548 | u8 *p = data; |
6ae74671 | 1549 | int i, cpu; |
4323b47c | 1550 | |
545a8e79 | 1551 | if (!nvdev) |
1552 | return; | |
1553 | ||
4323b47c SH |
1554 | switch (stringset) { |
1555 | case ETH_SS_STATS: | |
0c195567 | 1556 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) { |
1557 | memcpy(p, netvsc_stats[i].name, ETH_GSTRING_LEN); | |
1558 | p += ETH_GSTRING_LEN; | |
1559 | } | |
1560 | ||
1561 | for (i = 0; i < ARRAY_SIZE(vf_stats); i++) { | |
1562 | memcpy(p, vf_stats[i].name, ETH_GSTRING_LEN); | |
1563 | p += ETH_GSTRING_LEN; | |
1564 | } | |
6c80f3fc | 1565 | |
6c80f3fc SX |
1566 | for (i = 0; i < nvdev->num_chn; i++) { |
1567 | sprintf(p, "tx_queue_%u_packets", i); | |
1568 | p += ETH_GSTRING_LEN; | |
1569 | sprintf(p, "tx_queue_%u_bytes", i); | |
1570 | p += ETH_GSTRING_LEN; | |
1571 | sprintf(p, "rx_queue_%u_packets", i); | |
1572 | p += ETH_GSTRING_LEN; | |
1573 | sprintf(p, "rx_queue_%u_bytes", i); | |
1574 | p += ETH_GSTRING_LEN; | |
351e1581 HZ |
1575 | sprintf(p, "rx_queue_%u_xdp_drop", i); |
1576 | p += ETH_GSTRING_LEN; | |
6c80f3fc SX |
1577 | } |
1578 | ||
6ae74671 YR |
1579 | for_each_present_cpu(cpu) { |
1580 | for (i = 0; i < ARRAY_SIZE(pcpu_stats); i++) { | |
1581 | sprintf(p, pcpu_stats[i].name, cpu); | |
1582 | p += ETH_GSTRING_LEN; | |
1583 | } | |
1584 | } | |
1585 | ||
4323b47c SH |
1586 | break; |
1587 | } | |
1588 | } | |
1589 | ||
b5a5dc8d | 1590 | static int |
4823eb2f HZ |
1591 | netvsc_get_rss_hash_opts(struct net_device_context *ndc, |
1592 | struct ethtool_rxnfc *info) | |
b5a5dc8d | 1593 | { |
486e3981 HZ |
1594 | const u32 l4_flag = RXH_L4_B_0_1 | RXH_L4_B_2_3; |
1595 | ||
b5a5dc8d | 1596 | info->data = RXH_IP_SRC | RXH_IP_DST; |
1597 | ||
1598 | switch (info->flow_type) { | |
1599 | case TCP_V4_FLOW: | |
0518ec4f HZ |
1600 | if (ndc->l4_hash & HV_TCP4_L4HASH) |
1601 | info->data |= l4_flag; | |
1602 | ||
1603 | break; | |
1604 | ||
b5a5dc8d | 1605 | case TCP_V6_FLOW: |
0518ec4f HZ |
1606 | if (ndc->l4_hash & HV_TCP6_L4HASH) |
1607 | info->data |= l4_flag; | |
1608 | ||
4823eb2f HZ |
1609 | break; |
1610 | ||
b5a5dc8d | 1611 | case UDP_V4_FLOW: |
486e3981 HZ |
1612 | if (ndc->l4_hash & HV_UDP4_L4HASH) |
1613 | info->data |= l4_flag; | |
4823eb2f HZ |
1614 | |
1615 | break; | |
1616 | ||
b5a5dc8d | 1617 | case UDP_V6_FLOW: |
486e3981 HZ |
1618 | if (ndc->l4_hash & HV_UDP6_L4HASH) |
1619 | info->data |= l4_flag; | |
4823eb2f HZ |
1620 | |
1621 | break; | |
1622 | ||
b5a5dc8d | 1623 | case IPV4_FLOW: |
1624 | case IPV6_FLOW: | |
1625 | break; | |
1626 | default: | |
1627 | info->data = 0; | |
1628 | break; | |
1629 | } | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
b448f4e8 | 1634 | static int |
1635 | netvsc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, | |
1636 | u32 *rules) | |
1637 | { | |
1638 | struct net_device_context *ndc = netdev_priv(dev); | |
867047c4 | 1639 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
545a8e79 | 1640 | |
1641 | if (!nvdev) | |
1642 | return -ENODEV; | |
b448f4e8 | 1643 | |
1644 | switch (info->cmd) { | |
1645 | case ETHTOOL_GRXRINGS: | |
1646 | info->data = nvdev->num_chn; | |
1647 | return 0; | |
b5a5dc8d | 1648 | |
1649 | case ETHTOOL_GRXFH: | |
4823eb2f | 1650 | return netvsc_get_rss_hash_opts(ndc, info); |
b448f4e8 | 1651 | } |
1652 | return -EOPNOTSUPP; | |
1653 | } | |
1654 | ||
4823eb2f HZ |
1655 | static int netvsc_set_rss_hash_opts(struct net_device_context *ndc, |
1656 | struct ethtool_rxnfc *info) | |
1657 | { | |
1658 | if (info->data == (RXH_IP_SRC | RXH_IP_DST | | |
1659 | RXH_L4_B_0_1 | RXH_L4_B_2_3)) { | |
486e3981 | 1660 | switch (info->flow_type) { |
0518ec4f HZ |
1661 | case TCP_V4_FLOW: |
1662 | ndc->l4_hash |= HV_TCP4_L4HASH; | |
1663 | break; | |
1664 | ||
1665 | case TCP_V6_FLOW: | |
1666 | ndc->l4_hash |= HV_TCP6_L4HASH; | |
1667 | break; | |
1668 | ||
486e3981 HZ |
1669 | case UDP_V4_FLOW: |
1670 | ndc->l4_hash |= HV_UDP4_L4HASH; | |
1671 | break; | |
1672 | ||
1673 | case UDP_V6_FLOW: | |
1674 | ndc->l4_hash |= HV_UDP6_L4HASH; | |
1675 | break; | |
1676 | ||
1677 | default: | |
4823eb2f | 1678 | return -EOPNOTSUPP; |
486e3981 | 1679 | } |
4823eb2f HZ |
1680 | |
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | if (info->data == (RXH_IP_SRC | RXH_IP_DST)) { | |
486e3981 | 1685 | switch (info->flow_type) { |
0518ec4f HZ |
1686 | case TCP_V4_FLOW: |
1687 | ndc->l4_hash &= ~HV_TCP4_L4HASH; | |
1688 | break; | |
1689 | ||
1690 | case TCP_V6_FLOW: | |
1691 | ndc->l4_hash &= ~HV_TCP6_L4HASH; | |
1692 | break; | |
1693 | ||
486e3981 HZ |
1694 | case UDP_V4_FLOW: |
1695 | ndc->l4_hash &= ~HV_UDP4_L4HASH; | |
1696 | break; | |
1697 | ||
1698 | case UDP_V6_FLOW: | |
1699 | ndc->l4_hash &= ~HV_UDP6_L4HASH; | |
1700 | break; | |
1701 | ||
1702 | default: | |
4823eb2f | 1703 | return -EOPNOTSUPP; |
486e3981 | 1704 | } |
4823eb2f HZ |
1705 | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | return -EOPNOTSUPP; | |
1710 | } | |
1711 | ||
1712 | static int | |
1713 | netvsc_set_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *info) | |
1714 | { | |
1715 | struct net_device_context *ndc = netdev_priv(ndev); | |
1716 | ||
1717 | if (info->cmd == ETHTOOL_SRXFH) | |
1718 | return netvsc_set_rss_hash_opts(ndc, info); | |
1719 | ||
1720 | return -EOPNOTSUPP; | |
1721 | } | |
1722 | ||
962f3fee | 1723 | static u32 netvsc_get_rxfh_key_size(struct net_device *dev) |
1724 | { | |
1725 | return NETVSC_HASH_KEYLEN; | |
1726 | } | |
1727 | ||
1728 | static u32 netvsc_rss_indir_size(struct net_device *dev) | |
1729 | { | |
ff4a4419 | 1730 | return ITAB_NUM; |
962f3fee | 1731 | } |
1732 | ||
1733 | static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, | |
1734 | u8 *hfunc) | |
1735 | { | |
1736 | struct net_device_context *ndc = netdev_priv(dev); | |
867047c4 | 1737 | struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
eb996edb | 1738 | struct rndis_device *rndis_dev; |
ff4a4419 | 1739 | int i; |
962f3fee | 1740 | |
545a8e79 | 1741 | if (!ndev) |
1742 | return -ENODEV; | |
1743 | ||
962f3fee | 1744 | if (hfunc) |
1745 | *hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */ | |
1746 | ||
eb996edb | 1747 | rndis_dev = ndev->extension; |
ff4a4419 | 1748 | if (indir) { |
1749 | for (i = 0; i < ITAB_NUM; i++) | |
b0689faa | 1750 | indir[i] = ndc->rx_table[i]; |
ff4a4419 | 1751 | } |
1752 | ||
962f3fee | 1753 | if (key) |
1754 | memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN); | |
1755 | ||
1756 | return 0; | |
1757 | } | |
1758 | ||
1759 | static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir, | |
1760 | const u8 *key, const u8 hfunc) | |
1761 | { | |
1762 | struct net_device_context *ndc = netdev_priv(dev); | |
545a8e79 | 1763 | struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
eb996edb | 1764 | struct rndis_device *rndis_dev; |
ff4a4419 | 1765 | int i; |
962f3fee | 1766 | |
545a8e79 | 1767 | if (!ndev) |
1768 | return -ENODEV; | |
1769 | ||
962f3fee | 1770 | if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) |
1771 | return -EOPNOTSUPP; | |
1772 | ||
eb996edb | 1773 | rndis_dev = ndev->extension; |
ff4a4419 | 1774 | if (indir) { |
1775 | for (i = 0; i < ITAB_NUM; i++) | |
db3cd7af | 1776 | if (indir[i] >= ndev->num_chn) |
ff4a4419 | 1777 | return -EINVAL; |
1778 | ||
1779 | for (i = 0; i < ITAB_NUM; i++) | |
b0689faa | 1780 | ndc->rx_table[i] = indir[i]; |
ff4a4419 | 1781 | } |
1782 | ||
1783 | if (!key) { | |
1784 | if (!indir) | |
1785 | return 0; | |
1786 | ||
1787 | key = rndis_dev->rss_key; | |
1788 | } | |
962f3fee | 1789 | |
715e2ec5 | 1790 | return rndis_filter_set_rss_param(rndis_dev, key); |
962f3fee | 1791 | } |
1792 | ||
8b532797 | 1793 | /* Hyper-V RNDIS protocol does not have ring in the HW sense. |
1794 | * It does have pre-allocated receive area which is divided into sections. | |
1795 | */ | |
1796 | static void __netvsc_get_ringparam(struct netvsc_device *nvdev, | |
1797 | struct ethtool_ringparam *ring) | |
1798 | { | |
1799 | u32 max_buf_size; | |
1800 | ||
1801 | ring->rx_pending = nvdev->recv_section_cnt; | |
1802 | ring->tx_pending = nvdev->send_section_cnt; | |
1803 | ||
1804 | if (nvdev->nvsp_version <= NVSP_PROTOCOL_VERSION_2) | |
1805 | max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
1806 | else | |
1807 | max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
1808 | ||
1809 | ring->rx_max_pending = max_buf_size / nvdev->recv_section_size; | |
1810 | ring->tx_max_pending = NETVSC_SEND_BUFFER_SIZE | |
1811 | / nvdev->send_section_size; | |
1812 | } | |
1813 | ||
1814 | static void netvsc_get_ringparam(struct net_device *ndev, | |
1815 | struct ethtool_ringparam *ring) | |
1816 | { | |
1817 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
1818 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); | |
1819 | ||
1820 | if (!nvdev) | |
1821 | return; | |
1822 | ||
1823 | __netvsc_get_ringparam(nvdev, ring); | |
1824 | } | |
1825 | ||
1826 | static int netvsc_set_ringparam(struct net_device *ndev, | |
1827 | struct ethtool_ringparam *ring) | |
1828 | { | |
1829 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
1830 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); | |
7c9f335a | 1831 | struct netvsc_device_info *device_info; |
8b532797 | 1832 | struct ethtool_ringparam orig; |
1833 | u32 new_tx, new_rx; | |
8b532797 | 1834 | int ret = 0; |
1835 | ||
1836 | if (!nvdev || nvdev->destroy) | |
1837 | return -ENODEV; | |
1838 | ||
1839 | memset(&orig, 0, sizeof(orig)); | |
1840 | __netvsc_get_ringparam(nvdev, &orig); | |
1841 | ||
1842 | new_tx = clamp_t(u32, ring->tx_pending, | |
1843 | NETVSC_MIN_TX_SECTIONS, orig.tx_max_pending); | |
1844 | new_rx = clamp_t(u32, ring->rx_pending, | |
1845 | NETVSC_MIN_RX_SECTIONS, orig.rx_max_pending); | |
1846 | ||
1847 | if (new_tx == orig.tx_pending && | |
1848 | new_rx == orig.rx_pending) | |
1849 | return 0; /* no change */ | |
1850 | ||
7c9f335a HZ |
1851 | device_info = netvsc_devinfo_get(nvdev); |
1852 | ||
1853 | if (!device_info) | |
1854 | return -ENOMEM; | |
1855 | ||
1856 | device_info->send_sections = new_tx; | |
1857 | device_info->recv_sections = new_rx; | |
8b532797 | 1858 | |
7b2ee50c SH |
1859 | ret = netvsc_detach(ndev, nvdev); |
1860 | if (ret) | |
7c9f335a | 1861 | goto out; |
8b532797 | 1862 | |
7c9f335a | 1863 | ret = netvsc_attach(ndev, device_info); |
7b2ee50c | 1864 | if (ret) { |
7c9f335a HZ |
1865 | device_info->send_sections = orig.tx_pending; |
1866 | device_info->recv_sections = orig.rx_pending; | |
8b532797 | 1867 | |
7c9f335a | 1868 | if (netvsc_attach(ndev, device_info)) |
7b2ee50c SH |
1869 | netdev_err(ndev, "restoring ringparam failed"); |
1870 | } | |
8b532797 | 1871 | |
7c9f335a | 1872 | out: |
351e1581 | 1873 | netvsc_devinfo_put(device_info); |
8b532797 | 1874 | return ret; |
1875 | } | |
1876 | ||
351e1581 HZ |
1877 | static netdev_features_t netvsc_fix_features(struct net_device *ndev, |
1878 | netdev_features_t features) | |
1879 | { | |
1880 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
1881 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); | |
1882 | ||
1883 | if (!nvdev || nvdev->destroy) | |
1884 | return features; | |
1885 | ||
1886 | if ((features & NETIF_F_LRO) && netvsc_xdp_get(nvdev)) { | |
1887 | features ^= NETIF_F_LRO; | |
1888 | netdev_info(ndev, "Skip LRO - unsupported with XDP\n"); | |
1889 | } | |
1890 | ||
1891 | return features; | |
1892 | } | |
1893 | ||
d6792a5a HZ |
1894 | static int netvsc_set_features(struct net_device *ndev, |
1895 | netdev_features_t features) | |
1896 | { | |
1897 | netdev_features_t change = features ^ ndev->features; | |
1898 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
1899 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); | |
68622d07 | 1900 | struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev); |
d6792a5a | 1901 | struct ndis_offload_params offloads; |
68622d07 | 1902 | int ret = 0; |
d6792a5a HZ |
1903 | |
1904 | if (!nvdev || nvdev->destroy) | |
1905 | return -ENODEV; | |
1906 | ||
1907 | if (!(change & NETIF_F_LRO)) | |
68622d07 | 1908 | goto syncvf; |
d6792a5a HZ |
1909 | |
1910 | memset(&offloads, 0, sizeof(struct ndis_offload_params)); | |
1911 | ||
1912 | if (features & NETIF_F_LRO) { | |
1913 | offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED; | |
1914 | offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED; | |
1915 | } else { | |
1916 | offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED; | |
1917 | offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED; | |
1918 | } | |
1919 | ||
68622d07 HZ |
1920 | ret = rndis_filter_set_offload_params(ndev, nvdev, &offloads); |
1921 | ||
c4509a5a | 1922 | if (ret) { |
68622d07 | 1923 | features ^= NETIF_F_LRO; |
c4509a5a HZ |
1924 | ndev->features = features; |
1925 | } | |
68622d07 HZ |
1926 | |
1927 | syncvf: | |
1928 | if (!vf_netdev) | |
1929 | return ret; | |
1930 | ||
1931 | vf_netdev->wanted_features = features; | |
1932 | netdev_update_features(vf_netdev); | |
1933 | ||
1934 | return ret; | |
d6792a5a HZ |
1935 | } |
1936 | ||
273de02a HZ |
1937 | static u32 netvsc_get_msglevel(struct net_device *ndev) |
1938 | { | |
1939 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
1940 | ||
1941 | return ndev_ctx->msg_enable; | |
1942 | } | |
1943 | ||
1944 | static void netvsc_set_msglevel(struct net_device *ndev, u32 val) | |
1945 | { | |
1946 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
1947 | ||
1948 | ndev_ctx->msg_enable = val; | |
1949 | } | |
1950 | ||
f82f4ad7 SH |
1951 | static const struct ethtool_ops ethtool_ops = { |
1952 | .get_drvinfo = netvsc_get_drvinfo, | |
273de02a HZ |
1953 | .get_msglevel = netvsc_get_msglevel, |
1954 | .set_msglevel = netvsc_set_msglevel, | |
f82f4ad7 | 1955 | .get_link = ethtool_op_get_link, |
4323b47c SH |
1956 | .get_ethtool_stats = netvsc_get_ethtool_stats, |
1957 | .get_sset_count = netvsc_get_sset_count, | |
1958 | .get_strings = netvsc_get_strings, | |
59995370 | 1959 | .get_channels = netvsc_get_channels, |
b5960e6e | 1960 | .set_channels = netvsc_set_channels, |
76d13b56 | 1961 | .get_ts_info = ethtool_op_get_ts_info, |
b448f4e8 | 1962 | .get_rxnfc = netvsc_get_rxnfc, |
4823eb2f | 1963 | .set_rxnfc = netvsc_set_rxnfc, |
962f3fee | 1964 | .get_rxfh_key_size = netvsc_get_rxfh_key_size, |
1965 | .get_rxfh_indir_size = netvsc_rss_indir_size, | |
1966 | .get_rxfh = netvsc_get_rxfh, | |
1967 | .set_rxfh = netvsc_set_rxfh, | |
5e8456fd PR |
1968 | .get_link_ksettings = netvsc_get_link_ksettings, |
1969 | .set_link_ksettings = netvsc_set_link_ksettings, | |
8b532797 | 1970 | .get_ringparam = netvsc_get_ringparam, |
1971 | .set_ringparam = netvsc_set_ringparam, | |
f82f4ad7 SH |
1972 | }; |
1973 | ||
df2fff28 GKH |
1974 | static const struct net_device_ops device_ops = { |
1975 | .ndo_open = netvsc_open, | |
1976 | .ndo_stop = netvsc_close, | |
1977 | .ndo_start_xmit = netvsc_start_xmit, | |
bee9d41b SH |
1978 | .ndo_change_rx_flags = netvsc_change_rx_flags, |
1979 | .ndo_set_rx_mode = netvsc_set_rx_mode, | |
351e1581 | 1980 | .ndo_fix_features = netvsc_fix_features, |
d6792a5a | 1981 | .ndo_set_features = netvsc_set_features, |
4d447c9a | 1982 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1983 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1984 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1985 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1986 | .ndo_get_stats64 = netvsc_get_stats64, |
351e1581 | 1987 | .ndo_bpf = netvsc_bpf, |
df2fff28 GKH |
1988 | }; |
1989 | ||
c996edcf | 1990 | /* |
27a70af3 VK |
1991 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1992 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1993 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1994 | */ |
891de74d | 1995 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1996 | { |
0a1275ca VK |
1997 | struct net_device_context *ndev_ctx = |
1998 | container_of(w, struct net_device_context, dwork.work); | |
1999 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
2000 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 2001 | struct netvsc_device *net_device; |
891de74d | 2002 | struct rndis_device *rdev; |
27a70af3 VK |
2003 | struct netvsc_reconfig *event = NULL; |
2004 | bool notify = false, reschedule = false; | |
2005 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 2006 | |
9b4e946c | 2007 | /* if changes are happening, comeback later */ |
2008 | if (!rtnl_trylock()) { | |
2009 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
2010 | return; | |
2011 | } | |
2012 | ||
a0be450e | 2013 | net_device = rtnl_dereference(ndev_ctx->nvdev); |
2014 | if (!net_device) | |
1bdcec8a VK |
2015 | goto out_unlock; |
2016 | ||
891de74d | 2017 | rdev = net_device->extension; |
891de74d | 2018 | |
27a70af3 VK |
2019 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
2020 | if (time_is_after_jiffies(next_reconfig)) { | |
2021 | /* link_watch only sends one notification with current state | |
2022 | * per second, avoid doing reconfig more frequently. Handle | |
2023 | * wrap around. | |
2024 | */ | |
2025 | delay = next_reconfig - jiffies; | |
2026 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
2027 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 2028 | goto out_unlock; |
27a70af3 VK |
2029 | } |
2030 | ndev_ctx->last_reconfig = jiffies; | |
2031 | ||
2032 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
2033 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
2034 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
2035 | struct netvsc_reconfig, list); | |
2036 | list_del(&event->list); | |
2037 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
2038 | } | |
2039 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
2040 | ||
2041 | if (!event) | |
1bdcec8a | 2042 | goto out_unlock; |
27a70af3 VK |
2043 | |
2044 | switch (event->event) { | |
2045 | /* Only the following events are possible due to the check in | |
2046 | * netvsc_linkstatus_callback() | |
2047 | */ | |
2048 | case RNDIS_STATUS_MEDIA_CONNECT: | |
2049 | if (rdev->link_state) { | |
2050 | rdev->link_state = false; | |
0c195567 | 2051 | netif_carrier_on(net); |
1b704c4a | 2052 | netvsc_tx_enable(net_device, net); |
27a70af3 VK |
2053 | } else { |
2054 | notify = true; | |
2055 | } | |
2056 | kfree(event); | |
2057 | break; | |
2058 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
2059 | if (!rdev->link_state) { | |
2060 | rdev->link_state = true; | |
2061 | netif_carrier_off(net); | |
1b704c4a | 2062 | netvsc_tx_disable(net_device, net); |
27a70af3 VK |
2063 | } |
2064 | kfree(event); | |
2065 | break; | |
2066 | case RNDIS_STATUS_NETWORK_CHANGE: | |
2067 | /* Only makes sense if carrier is present */ | |
2068 | if (!rdev->link_state) { | |
2069 | rdev->link_state = true; | |
2070 | netif_carrier_off(net); | |
1b704c4a | 2071 | netvsc_tx_disable(net_device, net); |
27a70af3 VK |
2072 | event->event = RNDIS_STATUS_MEDIA_CONNECT; |
2073 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 2074 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
2075 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
2076 | reschedule = true; | |
3a494e71 | 2077 | } |
27a70af3 | 2078 | break; |
891de74d HZ |
2079 | } |
2080 | ||
2081 | rtnl_unlock(); | |
2082 | ||
2083 | if (notify) | |
2084 | netdev_notify_peers(net); | |
27a70af3 VK |
2085 | |
2086 | /* link_watch only sends one notification with current state per | |
2087 | * second, handle next reconfig event in 2 seconds. | |
2088 | */ | |
2089 | if (reschedule) | |
2090 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
2091 | |
2092 | return; | |
2093 | ||
2094 | out_unlock: | |
2095 | rtnl_unlock(); | |
c996edcf HZ |
2096 | } |
2097 | ||
8cde8f0c SH |
2098 | static struct net_device *get_netvsc_byref(struct net_device *vf_netdev) |
2099 | { | |
7bf7bb37 | 2100 | struct net_device_context *net_device_ctx; |
8cde8f0c SH |
2101 | struct net_device *dev; |
2102 | ||
7bf7bb37 SH |
2103 | dev = netdev_master_upper_dev_get(vf_netdev); |
2104 | if (!dev || dev->netdev_ops != &device_ops) | |
2105 | return NULL; /* not a netvsc device */ | |
8cde8f0c | 2106 | |
7bf7bb37 SH |
2107 | net_device_ctx = netdev_priv(dev); |
2108 | if (!rtnl_dereference(net_device_ctx->nvdev)) | |
2109 | return NULL; /* device is removed */ | |
8cde8f0c | 2110 | |
7bf7bb37 | 2111 | return dev; |
8cde8f0c SH |
2112 | } |
2113 | ||
0c195567 | 2114 | /* Called when VF is injecting data into network stack. |
2115 | * Change the associated network device from VF to netvsc. | |
2116 | * note: already called with rcu_read_lock | |
2117 | */ | |
2118 | static rx_handler_result_t netvsc_vf_handle_frame(struct sk_buff **pskb) | |
2119 | { | |
2120 | struct sk_buff *skb = *pskb; | |
2121 | struct net_device *ndev = rcu_dereference(skb->dev->rx_handler_data); | |
2122 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
2123 | struct netvsc_vf_pcpu_stats *pcpu_stats | |
2124 | = this_cpu_ptr(ndev_ctx->vf_stats); | |
2125 | ||
996ed047 SH |
2126 | skb = skb_share_check(skb, GFP_ATOMIC); |
2127 | if (unlikely(!skb)) | |
2128 | return RX_HANDLER_CONSUMED; | |
2129 | ||
2130 | *pskb = skb; | |
2131 | ||
0c195567 | 2132 | skb->dev = ndev; |
2133 | ||
2134 | u64_stats_update_begin(&pcpu_stats->syncp); | |
2135 | pcpu_stats->rx_packets++; | |
2136 | pcpu_stats->rx_bytes += skb->len; | |
2137 | u64_stats_update_end(&pcpu_stats->syncp); | |
2138 | ||
2139 | return RX_HANDLER_ANOTHER; | |
2140 | } | |
2141 | ||
8cde8f0c SH |
2142 | static int netvsc_vf_join(struct net_device *vf_netdev, |
2143 | struct net_device *ndev) | |
2144 | { | |
2145 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
2146 | int ret; | |
2147 | ||
2148 | ret = netdev_rx_handler_register(vf_netdev, | |
2149 | netvsc_vf_handle_frame, ndev); | |
2150 | if (ret != 0) { | |
2151 | netdev_err(vf_netdev, | |
2152 | "can not register netvsc VF receive handler (err = %d)\n", | |
2153 | ret); | |
2154 | goto rx_handler_failed; | |
2155 | } | |
2156 | ||
2157 | ret = netdev_master_upper_dev_link(vf_netdev, ndev, | |
2158 | NULL, NULL, NULL); | |
2159 | if (ret != 0) { | |
2160 | netdev_err(vf_netdev, | |
2161 | "can not set master device %s (err = %d)\n", | |
2162 | ndev->name, ret); | |
2163 | goto upper_link_failed; | |
2164 | } | |
2165 | ||
2166 | /* set slave flag before open to prevent IPv6 addrconf */ | |
2167 | vf_netdev->flags |= IFF_SLAVE; | |
2168 | ||
2169 | schedule_delayed_work(&ndev_ctx->vf_takeover, VF_TAKEOVER_INT); | |
2170 | ||
2171 | call_netdevice_notifiers(NETDEV_JOIN, vf_netdev); | |
2172 | ||
2173 | netdev_info(vf_netdev, "joined to %s\n", ndev->name); | |
2174 | return 0; | |
2175 | ||
2176 | upper_link_failed: | |
2177 | netdev_rx_handler_unregister(vf_netdev); | |
2178 | rx_handler_failed: | |
2179 | return ret; | |
2180 | } | |
2181 | ||
0c195567 | 2182 | static void __netvsc_vf_setup(struct net_device *ndev, |
2183 | struct net_device *vf_netdev) | |
2184 | { | |
2185 | int ret; | |
2186 | ||
0c195567 | 2187 | /* Align MTU of VF with master */ |
2188 | ret = dev_set_mtu(vf_netdev, ndev->mtu); | |
2189 | if (ret) | |
2190 | netdev_warn(vf_netdev, | |
2191 | "unable to change mtu to %u\n", ndev->mtu); | |
2192 | ||
bee9d41b | 2193 | /* set multicast etc flags on VF */ |
567c5e13 | 2194 | dev_change_flags(vf_netdev, ndev->flags | IFF_SLAVE, NULL); |
b0dee791 SH |
2195 | |
2196 | /* sync address list from ndev to VF */ | |
2197 | netif_addr_lock_bh(ndev); | |
bee9d41b SH |
2198 | dev_uc_sync(vf_netdev, ndev); |
2199 | dev_mc_sync(vf_netdev, ndev); | |
b0dee791 | 2200 | netif_addr_unlock_bh(ndev); |
bee9d41b | 2201 | |
0c195567 | 2202 | if (netif_running(ndev)) { |
00f54e68 | 2203 | ret = dev_open(vf_netdev, NULL); |
0c195567 | 2204 | if (ret) |
2205 | netdev_warn(vf_netdev, | |
2206 | "unable to open: %d\n", ret); | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | /* Setup VF as slave of the synthetic device. | |
2211 | * Runs in workqueue to avoid recursion in netlink callbacks. | |
2212 | */ | |
2213 | static void netvsc_vf_setup(struct work_struct *w) | |
2214 | { | |
2215 | struct net_device_context *ndev_ctx | |
6123c668 | 2216 | = container_of(w, struct net_device_context, vf_takeover.work); |
0c195567 | 2217 | struct net_device *ndev = hv_get_drvdata(ndev_ctx->device_ctx); |
2218 | struct net_device *vf_netdev; | |
2219 | ||
fb84af8a | 2220 | if (!rtnl_trylock()) { |
6123c668 | 2221 | schedule_delayed_work(&ndev_ctx->vf_takeover, 0); |
fb84af8a | 2222 | return; |
2223 | } | |
2224 | ||
0c195567 | 2225 | vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
2226 | if (vf_netdev) | |
2227 | __netvsc_vf_setup(ndev, vf_netdev); | |
2228 | ||
2229 | rtnl_unlock(); | |
2230 | } | |
2231 | ||
00547955 HZ |
2232 | /* Find netvsc by VF serial number. |
2233 | * The PCI hyperv controller records the serial number as the slot kobj name. | |
00d7ddba SH |
2234 | */ |
2235 | static struct net_device *get_netvsc_byslot(const struct net_device *vf_netdev) | |
2236 | { | |
2237 | struct device *parent = vf_netdev->dev.parent; | |
2238 | struct net_device_context *ndev_ctx; | |
2239 | struct pci_dev *pdev; | |
00547955 | 2240 | u32 serial; |
00d7ddba SH |
2241 | |
2242 | if (!parent || !dev_is_pci(parent)) | |
2243 | return NULL; /* not a PCI device */ | |
2244 | ||
2245 | pdev = to_pci_dev(parent); | |
2246 | if (!pdev->slot) { | |
2247 | netdev_notice(vf_netdev, "no PCI slot information\n"); | |
2248 | return NULL; | |
2249 | } | |
2250 | ||
00547955 HZ |
2251 | if (kstrtou32(pci_slot_name(pdev->slot), 10, &serial)) { |
2252 | netdev_notice(vf_netdev, "Invalid vf serial:%s\n", | |
2253 | pci_slot_name(pdev->slot)); | |
2254 | return NULL; | |
2255 | } | |
2256 | ||
00d7ddba SH |
2257 | list_for_each_entry(ndev_ctx, &netvsc_dev_list, list) { |
2258 | if (!ndev_ctx->vf_alloc) | |
2259 | continue; | |
2260 | ||
00547955 | 2261 | if (ndev_ctx->vf_serial == serial) |
00d7ddba SH |
2262 | return hv_get_drvdata(ndev_ctx->device_ctx); |
2263 | } | |
2264 | ||
2265 | netdev_notice(vf_netdev, | |
00547955 | 2266 | "no netdev found for vf serial:%u\n", serial); |
00d7ddba SH |
2267 | return NULL; |
2268 | } | |
2269 | ||
8cde8f0c | 2270 | static int netvsc_register_vf(struct net_device *vf_netdev) |
84bf9cef | 2271 | { |
0a1275ca | 2272 | struct net_device_context *net_device_ctx; |
84bf9cef | 2273 | struct netvsc_device *netvsc_dev; |
351e1581 | 2274 | struct bpf_prog *prog; |
00d7ddba | 2275 | struct net_device *ndev; |
c0a41b88 | 2276 | int ret; |
84bf9cef | 2277 | |
8cde8f0c SH |
2278 | if (vf_netdev->addr_len != ETH_ALEN) |
2279 | return NOTIFY_DONE; | |
2280 | ||
00d7ddba | 2281 | ndev = get_netvsc_byslot(vf_netdev); |
8cde8f0c SH |
2282 | if (!ndev) |
2283 | return NOTIFY_DONE; | |
2284 | ||
0a1275ca | 2285 | net_device_ctx = netdev_priv(ndev); |
545a8e79 | 2286 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
f207c10d | 2287 | if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev)) |
8cde8f0c | 2288 | return NOTIFY_DONE; |
0c195567 | 2289 | |
52d3b494 | 2290 | /* if synthetic interface is a different namespace, |
c0a41b88 SH |
2291 | * then move the VF to that namespace; join will be |
2292 | * done again in that context. | |
2293 | */ | |
2294 | if (!net_eq(dev_net(ndev), dev_net(vf_netdev))) { | |
2295 | ret = dev_change_net_namespace(vf_netdev, | |
2296 | dev_net(ndev), "eth%d"); | |
2297 | if (ret) | |
2298 | netdev_err(vf_netdev, | |
2299 | "could not move to same namespace as %s: %d\n", | |
2300 | ndev->name, ret); | |
2301 | else | |
2302 | netdev_info(vf_netdev, | |
2303 | "VF moved to namespace with: %s\n", | |
2304 | ndev->name); | |
8cde8f0c | 2305 | return NOTIFY_DONE; |
c0a41b88 | 2306 | } |
1ff78076 | 2307 | |
8cde8f0c | 2308 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
0c195567 | 2309 | |
c0a41b88 SH |
2310 | if (netvsc_vf_join(vf_netdev, ndev) != 0) |
2311 | return NOTIFY_DONE; | |
2312 | ||
07d0f000 | 2313 | dev_hold(vf_netdev); |
8cde8f0c | 2314 | rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); |
68622d07 HZ |
2315 | |
2316 | vf_netdev->wanted_features = ndev->features; | |
2317 | netdev_update_features(vf_netdev); | |
2318 | ||
351e1581 HZ |
2319 | prog = netvsc_xdp_get(netvsc_dev); |
2320 | netvsc_vf_setxdp(vf_netdev, prog); | |
2321 | ||
8cde8f0c | 2322 | return NOTIFY_OK; |
84bf9cef KS |
2323 | } |
2324 | ||
9a0c48df | 2325 | /* VF up/down change detected, schedule to change data path */ |
8cde8f0c | 2326 | static int netvsc_vf_changed(struct net_device *vf_netdev) |
84bf9cef | 2327 | { |
7b83f520 | 2328 | struct net_device_context *net_device_ctx; |
84bf9cef | 2329 | struct netvsc_device *netvsc_dev; |
8cde8f0c | 2330 | struct net_device *ndev; |
9a0c48df | 2331 | bool vf_is_up = netif_running(vf_netdev); |
fb84af8a | 2332 | |
8cde8f0c SH |
2333 | ndev = get_netvsc_byref(vf_netdev); |
2334 | if (!ndev) | |
2335 | return NOTIFY_DONE; | |
2336 | ||
7b83f520 | 2337 | net_device_ctx = netdev_priv(ndev); |
2338 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); | |
0c195567 | 2339 | if (!netvsc_dev) |
8cde8f0c | 2340 | return NOTIFY_DONE; |
84bf9cef | 2341 | |
9a0c48df SH |
2342 | netvsc_switch_datapath(ndev, vf_is_up); |
2343 | netdev_info(ndev, "Data path switched %s VF: %s\n", | |
2344 | vf_is_up ? "to" : "from", vf_netdev->name); | |
84bf9cef | 2345 | |
8cde8f0c | 2346 | return NOTIFY_OK; |
84bf9cef KS |
2347 | } |
2348 | ||
8cde8f0c | 2349 | static int netvsc_unregister_vf(struct net_device *vf_netdev) |
84bf9cef | 2350 | { |
8cde8f0c | 2351 | struct net_device *ndev; |
0a1275ca | 2352 | struct net_device_context *net_device_ctx; |
84bf9cef | 2353 | |
8cde8f0c SH |
2354 | ndev = get_netvsc_byref(vf_netdev); |
2355 | if (!ndev) | |
2356 | return NOTIFY_DONE; | |
1ff78076 SS |
2357 | |
2358 | net_device_ctx = netdev_priv(ndev); | |
8cde8f0c | 2359 | cancel_delayed_work_sync(&net_device_ctx->vf_takeover); |
1ff78076 | 2360 | |
0a1275ca | 2361 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
f207c10d | 2362 | |
351e1581 HZ |
2363 | netvsc_vf_setxdp(vf_netdev, NULL); |
2364 | ||
8cde8f0c SH |
2365 | netdev_rx_handler_unregister(vf_netdev); |
2366 | netdev_upper_dev_unlink(vf_netdev, ndev); | |
f207c10d | 2367 | RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL); |
07d0f000 | 2368 | dev_put(vf_netdev); |
ec158f77 | 2369 | |
8cde8f0c | 2370 | return NOTIFY_OK; |
84bf9cef KS |
2371 | } |
2372 | ||
84946899 S |
2373 | static int netvsc_probe(struct hv_device *dev, |
2374 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 2375 | { |
df2fff28 GKH |
2376 | struct net_device *net = NULL; |
2377 | struct net_device_context *net_device_ctx; | |
7c9f335a | 2378 | struct netvsc_device_info *device_info = NULL; |
5b54dac8 | 2379 | struct netvsc_device *nvdev; |
0c195567 | 2380 | int ret = -ENOMEM; |
df2fff28 | 2381 | |
5b54dac8 | 2382 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
2b01888d | 2383 | VRSS_CHANNEL_MAX); |
df2fff28 | 2384 | if (!net) |
0c195567 | 2385 | goto no_net; |
df2fff28 | 2386 | |
1b07da51 HZ |
2387 | netif_carrier_off(net); |
2388 | ||
b37879e6 HZ |
2389 | netvsc_init_settings(net); |
2390 | ||
df2fff28 | 2391 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 2392 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
2393 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
2394 | if (netif_msg_probe(net_device_ctx)) | |
2395 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
2396 | net_device_ctx->msg_enable); | |
2397 | ||
2ddd5e5f | 2398 | hv_set_drvdata(dev, net); |
f580aec4 | 2399 | |
891de74d | 2400 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
df2fff28 | 2401 | |
27a70af3 VK |
2402 | spin_lock_init(&net_device_ctx->lock); |
2403 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
6123c668 | 2404 | INIT_DELAYED_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup); |
0c195567 | 2405 | |
2406 | net_device_ctx->vf_stats | |
2407 | = netdev_alloc_pcpu_stats(struct netvsc_vf_pcpu_stats); | |
2408 | if (!net_device_ctx->vf_stats) | |
2409 | goto no_stats; | |
27a70af3 | 2410 | |
df2fff28 | 2411 | net->netdev_ops = &device_ops; |
7ad24ea4 | 2412 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 2413 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 2414 | |
14a03cf8 VK |
2415 | /* We always need headroom for rndis header */ |
2416 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
2417 | ||
6450f8f2 HZ |
2418 | /* Initialize the number of queues to be 1, we may change it if more |
2419 | * channels are offered later. | |
2420 | */ | |
2421 | netif_set_real_num_tx_queues(net, 1); | |
2422 | netif_set_real_num_rx_queues(net, 1); | |
2423 | ||
692e084e | 2424 | /* Notify the netvsc driver of the new device */ |
7c9f335a HZ |
2425 | device_info = netvsc_devinfo_get(NULL); |
2426 | ||
2427 | if (!device_info) { | |
2428 | ret = -ENOMEM; | |
2429 | goto devinfo_failed; | |
2430 | } | |
2431 | ||
2432 | nvdev = rndis_filter_device_add(dev, device_info); | |
9749fed5 | 2433 | if (IS_ERR(nvdev)) { |
2434 | ret = PTR_ERR(nvdev); | |
692e084e | 2435 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); |
0c195567 | 2436 | goto rndis_failed; |
df2fff28 | 2437 | } |
0c195567 | 2438 | |
7c9f335a | 2439 | memcpy(net->dev_addr, device_info->mac_adr, ETH_ALEN); |
692e084e | 2440 | |
e04e7a7b DC |
2441 | /* We must get rtnl lock before scheduling nvdev->subchan_work, |
2442 | * otherwise netvsc_subchan_work() can get rtnl lock first and wait | |
2443 | * all subchannels to show up, but that may not happen because | |
2444 | * netvsc_probe() can't get rtnl lock and as a result vmbus_onoffer() | |
2445 | * -> ... -> device_add() -> ... -> __device_attach() can't get | |
2446 | * the device lock, so all the subchannels can't be processed -- | |
52d3b494 | 2447 | * finally netvsc_subchan_work() hangs forever. |
e04e7a7b DC |
2448 | */ |
2449 | rtnl_lock(); | |
2450 | ||
3ffe64f1 SH |
2451 | if (nvdev->num_chn > 1) |
2452 | schedule_work(&nvdev->subchan_work); | |
2453 | ||
aefd80e8 | 2454 | /* hw_features computed in rndis_netdev_set_hwcaps() */ |
23312a3b | 2455 | net->features = net->hw_features | |
b441f795 HZ |
2456 | NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_CTAG_TX | |
2457 | NETIF_F_HW_VLAN_CTAG_RX; | |
23312a3b | 2458 | net->vlan_features = net->features; |
2459 | ||
d0c2c997 JW |
2460 | /* MTU range: 68 - 1500 or 65521 */ |
2461 | net->min_mtu = NETVSC_MTU_MIN; | |
2462 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) | |
2463 | net->max_mtu = NETVSC_MTU - ETH_HLEN; | |
2464 | else | |
2465 | net->max_mtu = ETH_DATA_LEN; | |
2466 | ||
f6f13c12 HZ |
2467 | nvdev->tx_disable = false; |
2468 | ||
7bf7bb37 | 2469 | ret = register_netdevice(net); |
a68f9614 HZ |
2470 | if (ret != 0) { |
2471 | pr_err("Unable to register netdev.\n"); | |
0c195567 | 2472 | goto register_failed; |
a68f9614 HZ |
2473 | } |
2474 | ||
7bf7bb37 SH |
2475 | list_add(&net_device_ctx->list, &netvsc_dev_list); |
2476 | rtnl_unlock(); | |
7c9f335a | 2477 | |
351e1581 | 2478 | netvsc_devinfo_put(device_info); |
7bf7bb37 | 2479 | return 0; |
0c195567 | 2480 | |
2481 | register_failed: | |
7bf7bb37 | 2482 | rtnl_unlock(); |
0c195567 | 2483 | rndis_filter_device_remove(dev, nvdev); |
2484 | rndis_failed: | |
351e1581 | 2485 | netvsc_devinfo_put(device_info); |
7c9f335a | 2486 | devinfo_failed: |
0c195567 | 2487 | free_percpu(net_device_ctx->vf_stats); |
2488 | no_stats: | |
2489 | hv_set_drvdata(dev, NULL); | |
2490 | free_netdev(net); | |
2491 | no_net: | |
2492 | return ret; | |
df2fff28 GKH |
2493 | } |
2494 | ||
415b023a | 2495 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 2496 | { |
122a5f64 | 2497 | struct net_device_context *ndev_ctx; |
7b2ee50c SH |
2498 | struct net_device *vf_netdev, *net; |
2499 | struct netvsc_device *nvdev; | |
2ddd5e5f | 2500 | |
3d541ac5 | 2501 | net = hv_get_drvdata(dev); |
df2fff28 | 2502 | if (net == NULL) { |
415b023a | 2503 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
2504 | return 0; |
2505 | } | |
2506 | ||
122a5f64 | 2507 | ndev_ctx = netdev_priv(net); |
3d541ac5 | 2508 | |
122a5f64 HZ |
2509 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
2510 | ||
018349d7 SH |
2511 | rtnl_lock(); |
2512 | nvdev = rtnl_dereference(ndev_ctx->nvdev); | |
351e1581 | 2513 | if (nvdev) { |
7b2ee50c | 2514 | cancel_work_sync(&nvdev->subchan_work); |
351e1581 HZ |
2515 | netvsc_xdp_set(net, NULL, NULL, nvdev); |
2516 | } | |
7b2ee50c | 2517 | |
df2fff28 GKH |
2518 | /* |
2519 | * Call to the vsc driver to let it know that the device is being | |
a0be450e | 2520 | * removed. Also blocks mtu and channel changes. |
df2fff28 | 2521 | */ |
ec158f77 SH |
2522 | vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
2523 | if (vf_netdev) | |
8cde8f0c | 2524 | netvsc_unregister_vf(vf_netdev); |
ec158f77 | 2525 | |
7b2ee50c SH |
2526 | if (nvdev) |
2527 | rndis_filter_device_remove(dev, nvdev); | |
2528 | ||
8195b139 | 2529 | unregister_netdevice(net); |
7bf7bb37 | 2530 | list_del(&ndev_ctx->list); |
8195b139 | 2531 | |
a0be450e | 2532 | rtnl_unlock(); |
2533 | ||
3d541ac5 VK |
2534 | hv_set_drvdata(dev, NULL); |
2535 | ||
0c195567 | 2536 | free_percpu(ndev_ctx->vf_stats); |
6c80f3fc | 2537 | free_netdev(net); |
df06bcff | 2538 | return 0; |
df2fff28 GKH |
2539 | } |
2540 | ||
0efeea5f DC |
2541 | static int netvsc_suspend(struct hv_device *dev) |
2542 | { | |
2543 | struct net_device_context *ndev_ctx; | |
2544 | struct net_device *vf_netdev, *net; | |
2545 | struct netvsc_device *nvdev; | |
2546 | int ret; | |
2547 | ||
2548 | net = hv_get_drvdata(dev); | |
2549 | ||
2550 | ndev_ctx = netdev_priv(net); | |
2551 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
2552 | ||
2553 | rtnl_lock(); | |
2554 | ||
2555 | nvdev = rtnl_dereference(ndev_ctx->nvdev); | |
2556 | if (nvdev == NULL) { | |
2557 | ret = -ENODEV; | |
2558 | goto out; | |
2559 | } | |
2560 | ||
2561 | vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); | |
2562 | if (vf_netdev) | |
2563 | netvsc_unregister_vf(vf_netdev); | |
2564 | ||
2565 | /* Save the current config info */ | |
2566 | ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev); | |
2567 | ||
2568 | ret = netvsc_detach(net, nvdev); | |
2569 | out: | |
2570 | rtnl_unlock(); | |
2571 | ||
2572 | return ret; | |
2573 | } | |
2574 | ||
2575 | static int netvsc_resume(struct hv_device *dev) | |
2576 | { | |
2577 | struct net_device *net = hv_get_drvdata(dev); | |
2578 | struct net_device_context *net_device_ctx; | |
2579 | struct netvsc_device_info *device_info; | |
2580 | int ret; | |
2581 | ||
2582 | rtnl_lock(); | |
2583 | ||
2584 | net_device_ctx = netdev_priv(net); | |
2585 | device_info = net_device_ctx->saved_netvsc_dev_info; | |
2586 | ||
2587 | ret = netvsc_attach(net, device_info); | |
2588 | ||
351e1581 | 2589 | netvsc_devinfo_put(device_info); |
0efeea5f DC |
2590 | net_device_ctx->saved_netvsc_dev_info = NULL; |
2591 | ||
351e1581 HZ |
2592 | rtnl_unlock(); |
2593 | ||
0efeea5f DC |
2594 | return ret; |
2595 | } | |
345c4cc3 | 2596 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 2597 | /* Network guid */ |
8f505944 | 2598 | { HV_NIC_GUID, }, |
c45cf2d4 | 2599 | { }, |
345c4cc3 S |
2600 | }; |
2601 | ||
2602 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
2603 | ||
f1542a66 | 2604 | /* The one and only one */ |
fde0ef9b | 2605 | static struct hv_driver netvsc_drv = { |
d31b20fc | 2606 | .name = KBUILD_MODNAME, |
345c4cc3 | 2607 | .id_table = id_table, |
fde0ef9b S |
2608 | .probe = netvsc_probe, |
2609 | .remove = netvsc_remove, | |
0efeea5f DC |
2610 | .suspend = netvsc_suspend, |
2611 | .resume = netvsc_resume, | |
af0a5646 | 2612 | .driver = { |
9a33629b | 2613 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
af0a5646 | 2614 | }, |
d4890970 | 2615 | }; |
f1542a66 | 2616 | |
8cde8f0c SH |
2617 | /* |
2618 | * On Hyper-V, every VF interface is matched with a corresponding | |
2619 | * synthetic interface. The synthetic interface is presented first | |
2620 | * to the guest. When the corresponding VF instance is registered, | |
2621 | * we will take care of switching the data path. | |
2622 | */ | |
2623 | static int netvsc_netdev_event(struct notifier_block *this, | |
2624 | unsigned long event, void *ptr) | |
2625 | { | |
2626 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
2627 | ||
2628 | /* Skip our own events */ | |
2629 | if (event_dev->netdev_ops == &device_ops) | |
2630 | return NOTIFY_DONE; | |
2631 | ||
2632 | /* Avoid non-Ethernet type devices */ | |
2633 | if (event_dev->type != ARPHRD_ETHER) | |
2634 | return NOTIFY_DONE; | |
2635 | ||
2636 | /* Avoid Vlan dev with same MAC registering as VF */ | |
2637 | if (is_vlan_dev(event_dev)) | |
2638 | return NOTIFY_DONE; | |
2639 | ||
2640 | /* Avoid Bonding master dev with same MAC registering as VF */ | |
2641 | if ((event_dev->priv_flags & IFF_BONDING) && | |
2642 | (event_dev->flags & IFF_MASTER)) | |
2643 | return NOTIFY_DONE; | |
2644 | ||
2645 | switch (event) { | |
2646 | case NETDEV_REGISTER: | |
2647 | return netvsc_register_vf(event_dev); | |
2648 | case NETDEV_UNREGISTER: | |
2649 | return netvsc_unregister_vf(event_dev); | |
2650 | case NETDEV_UP: | |
2651 | case NETDEV_DOWN: | |
2652 | return netvsc_vf_changed(event_dev); | |
2653 | default: | |
2654 | return NOTIFY_DONE; | |
2655 | } | |
2656 | } | |
2657 | ||
2658 | static struct notifier_block netvsc_netdev_notifier = { | |
2659 | .notifier_call = netvsc_netdev_event, | |
2660 | }; | |
2661 | ||
a9869c94 | 2662 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 2663 | { |
8cde8f0c | 2664 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 2665 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
2666 | } |
2667 | ||
1fde28cf | 2668 | static int __init netvsc_drv_init(void) |
df2fff28 | 2669 | { |
84bf9cef KS |
2670 | int ret; |
2671 | ||
fa85a6c2 HZ |
2672 | if (ring_size < RING_SIZE_MIN) { |
2673 | ring_size = RING_SIZE_MIN; | |
a7f99d0f | 2674 | pr_info("Increased ring_size to %u (min allowed)\n", |
fa85a6c2 HZ |
2675 | ring_size); |
2676 | } | |
a7f99d0f | 2677 | netvsc_ring_bytes = ring_size * PAGE_SIZE; |
84bf9cef | 2678 | |
a7f99d0f | 2679 | ret = vmbus_driver_register(&netvsc_drv); |
84bf9cef KS |
2680 | if (ret) |
2681 | return ret; | |
2682 | ||
8cde8f0c | 2683 | register_netdevice_notifier(&netvsc_netdev_notifier); |
84bf9cef | 2684 | return 0; |
df2fff28 GKH |
2685 | } |
2686 | ||
26c14cc1 | 2687 | MODULE_LICENSE("GPL"); |
7880fc54 | 2688 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 2689 | |
1fde28cf | 2690 | module_init(netvsc_drv_init); |
a9869c94 | 2691 | module_exit(netvsc_drv_exit); |