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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
fceaf24a | 22 | #include <linux/init.h> |
9079ce69 | 23 | #include <linux/atomic.h> |
fceaf24a HJ |
24 | #include <linux/module.h> |
25 | #include <linux/highmem.h> | |
26 | #include <linux/device.h> | |
fceaf24a | 27 | #include <linux/io.h> |
fceaf24a HJ |
28 | #include <linux/delay.h> |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/inetdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/skbuff.h> | |
c802db11 | 33 | #include <linux/if_vlan.h> |
fceaf24a | 34 | #include <linux/in.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
fceaf24a HJ |
36 | #include <net/arp.h> |
37 | #include <net/route.h> | |
38 | #include <net/sock.h> | |
39 | #include <net/pkt_sched.h> | |
3f335ea2 | 40 | |
5ca7252a | 41 | #include "hyperv_net.h" |
fceaf24a | 42 | |
fceaf24a | 43 | struct net_device_context { |
02fafbc6 | 44 | /* point back to our device context */ |
6bad88da | 45 | struct hv_device *device_ctx; |
122a5f64 | 46 | struct delayed_work dwork; |
792df872 | 47 | struct work_struct work; |
fceaf24a HJ |
48 | }; |
49 | ||
fa85a6c2 | 50 | #define RING_SIZE_MIN 64 |
99c8da0f | 51 | static int ring_size = 128; |
450d7a4b SH |
52 | module_param(ring_size, int, S_IRUGO); |
53 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 54 | |
d426b2e3 HZ |
55 | static void do_set_multicast(struct work_struct *w) |
56 | { | |
792df872 WM |
57 | struct net_device_context *ndevctx = |
58 | container_of(w, struct net_device_context, work); | |
d426b2e3 HZ |
59 | struct netvsc_device *nvdev; |
60 | struct rndis_device *rdev; | |
61 | ||
62 | nvdev = hv_get_drvdata(ndevctx->device_ctx); | |
792df872 WM |
63 | if (nvdev == NULL || nvdev->ndev == NULL) |
64 | return; | |
d426b2e3 HZ |
65 | |
66 | rdev = nvdev->extension; | |
67 | if (rdev == NULL) | |
792df872 | 68 | return; |
d426b2e3 | 69 | |
792df872 | 70 | if (nvdev->ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
71 | rndis_filter_set_packet_filter(rdev, |
72 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
73 | else | |
74 | rndis_filter_set_packet_filter(rdev, | |
75 | NDIS_PACKET_TYPE_BROADCAST | | |
76 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
77 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
78 | } |
79 | ||
4e9bfefa | 80 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 81 | { |
792df872 | 82 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 83 | |
792df872 | 84 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
85 | } |
86 | ||
fceaf24a HJ |
87 | static int netvsc_open(struct net_device *net) |
88 | { | |
fceaf24a | 89 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 90 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
891de74d HZ |
91 | struct netvsc_device *nvdev; |
92 | struct rndis_device *rdev; | |
02fafbc6 | 93 | int ret = 0; |
fceaf24a | 94 | |
891de74d HZ |
95 | netif_carrier_off(net); |
96 | ||
d515d0ff HZ |
97 | /* Open up the device */ |
98 | ret = rndis_filter_open(device_obj); | |
99 | if (ret != 0) { | |
100 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
101 | return ret; | |
fceaf24a HJ |
102 | } |
103 | ||
d515d0ff HZ |
104 | netif_start_queue(net); |
105 | ||
891de74d HZ |
106 | nvdev = hv_get_drvdata(device_obj); |
107 | rdev = nvdev->extension; | |
108 | if (!rdev->link_state) | |
109 | netif_carrier_on(net); | |
110 | ||
fceaf24a HJ |
111 | return ret; |
112 | } | |
113 | ||
fceaf24a HJ |
114 | static int netvsc_close(struct net_device *net) |
115 | { | |
fceaf24a | 116 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 117 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 118 | int ret; |
fceaf24a | 119 | |
0a282538 | 120 | netif_tx_disable(net); |
fceaf24a | 121 | |
792df872 WM |
122 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
123 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 124 | ret = rndis_filter_close(device_obj); |
fceaf24a | 125 | if (ret != 0) |
eb335bc4 | 126 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
fceaf24a | 127 | |
fceaf24a HJ |
128 | return ret; |
129 | } | |
130 | ||
8a00251a KS |
131 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
132 | int pkt_type) | |
133 | { | |
134 | struct rndis_packet *rndis_pkt; | |
135 | struct rndis_per_packet_info *ppi; | |
136 | ||
137 | rndis_pkt = &msg->msg.pkt; | |
138 | rndis_pkt->data_offset += ppi_size; | |
139 | ||
140 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
141 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
142 | ||
143 | ppi->size = ppi_size; | |
144 | ppi->type = pkt_type; | |
145 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
146 | ||
147 | rndis_pkt->per_pkt_info_len += ppi_size; | |
148 | ||
149 | return ppi; | |
150 | } | |
151 | ||
fceaf24a HJ |
152 | static void netvsc_xmit_completion(void *context) |
153 | { | |
4193d4f4 | 154 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 | 155 | struct sk_buff *skb = (struct sk_buff *) |
72a2f5bd | 156 | (unsigned long)packet->completion.send.send_completion_tid; |
fceaf24a | 157 | |
fceaf24a HJ |
158 | kfree(packet); |
159 | ||
1d06825b | 160 | if (skb) |
b220f5f9 | 161 | dev_kfree_skb_any(skb); |
fceaf24a HJ |
162 | } |
163 | ||
54a7357f KS |
164 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
165 | struct hv_page_buffer *pb) | |
166 | { | |
167 | int j = 0; | |
168 | ||
169 | /* Deal with compund pages by ignoring unused part | |
170 | * of the page. | |
171 | */ | |
172 | page += (offset >> PAGE_SHIFT); | |
173 | offset &= ~PAGE_MASK; | |
174 | ||
175 | while (len > 0) { | |
176 | unsigned long bytes; | |
177 | ||
178 | bytes = PAGE_SIZE - offset; | |
179 | if (bytes > len) | |
180 | bytes = len; | |
181 | pb[j].pfn = page_to_pfn(page); | |
182 | pb[j].offset = offset; | |
183 | pb[j].len = bytes; | |
184 | ||
185 | offset += bytes; | |
186 | len -= bytes; | |
187 | ||
188 | if (offset == PAGE_SIZE && len) { | |
189 | page++; | |
190 | offset = 0; | |
191 | j++; | |
192 | } | |
193 | } | |
194 | ||
195 | return j + 1; | |
196 | } | |
197 | ||
8a00251a KS |
198 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
199 | struct hv_page_buffer *pb) | |
54a7357f KS |
200 | { |
201 | u32 slots_used = 0; | |
202 | char *data = skb->data; | |
203 | int frags = skb_shinfo(skb)->nr_frags; | |
204 | int i; | |
205 | ||
206 | /* The packet is laid out thus: | |
207 | * 1. hdr | |
208 | * 2. skb linear data | |
209 | * 3. skb fragment data | |
210 | */ | |
211 | if (hdr != NULL) | |
212 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
213 | offset_in_page(hdr), | |
214 | len, &pb[slots_used]); | |
215 | ||
216 | slots_used += fill_pg_buf(virt_to_page(data), | |
217 | offset_in_page(data), | |
218 | skb_headlen(skb), &pb[slots_used]); | |
219 | ||
220 | for (i = 0; i < frags; i++) { | |
221 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
222 | ||
223 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
224 | frag->page_offset, | |
225 | skb_frag_size(frag), &pb[slots_used]); | |
226 | } | |
8a00251a | 227 | return slots_used; |
54a7357f KS |
228 | } |
229 | ||
230 | static int count_skb_frag_slots(struct sk_buff *skb) | |
231 | { | |
232 | int i, frags = skb_shinfo(skb)->nr_frags; | |
233 | int pages = 0; | |
234 | ||
235 | for (i = 0; i < frags; i++) { | |
236 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
237 | unsigned long size = skb_frag_size(frag); | |
238 | unsigned long offset = frag->page_offset; | |
239 | ||
240 | /* Skip unused frames from start of page */ | |
241 | offset &= ~PAGE_MASK; | |
242 | pages += PFN_UP(offset + size); | |
243 | } | |
244 | return pages; | |
245 | } | |
246 | ||
247 | static int netvsc_get_slots(struct sk_buff *skb) | |
248 | { | |
249 | char *data = skb->data; | |
250 | unsigned int offset = offset_in_page(data); | |
251 | unsigned int len = skb_headlen(skb); | |
252 | int slots; | |
253 | int frag_slots; | |
254 | ||
255 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
256 | frag_slots = count_skb_frag_slots(skb); | |
257 | return slots + frag_slots; | |
258 | } | |
259 | ||
02fafbc6 | 260 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 261 | { |
fceaf24a | 262 | struct net_device_context *net_device_ctx = netdev_priv(net); |
4193d4f4 | 263 | struct hv_netvsc_packet *packet; |
02fafbc6 | 264 | int ret; |
8a00251a KS |
265 | unsigned int num_data_pgs; |
266 | struct rndis_message *rndis_msg; | |
267 | struct rndis_packet *rndis_pkt; | |
268 | u32 rndis_msg_size; | |
269 | bool isvlan; | |
270 | struct rndis_per_packet_info *ppi; | |
fceaf24a | 271 | |
54a7357f KS |
272 | /* We will atmost need two pages to describe the rndis |
273 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
274 | * of pages in a single packet. | |
275 | */ | |
8a00251a KS |
276 | num_data_pgs = netvsc_get_slots(skb) + 2; |
277 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { | |
54a7357f KS |
278 | netdev_err(net, "Packet too big: %u\n", skb->len); |
279 | dev_kfree_skb(skb); | |
280 | net->stats.tx_dropped++; | |
281 | return NETDEV_TX_OK; | |
282 | } | |
fceaf24a | 283 | |
454f18a9 | 284 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 | 285 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
8a00251a | 286 | (num_data_pgs * sizeof(struct hv_page_buffer)) + |
86eedacc | 287 | sizeof(struct rndis_message) + |
1f5f3a75 | 288 | NDIS_VLAN_PPI_SIZE, GFP_ATOMIC); |
02fafbc6 | 289 | if (!packet) { |
bf769375 | 290 | /* out of memory, drop packet */ |
eb335bc4 | 291 | netdev_err(net, "unable to allocate hv_netvsc_packet\n"); |
b220f5f9 SH |
292 | |
293 | dev_kfree_skb(skb); | |
294 | net->stats.tx_dropped++; | |
bb6d5e76 | 295 | return NETDEV_TX_OK; |
fceaf24a HJ |
296 | } |
297 | ||
1f5f3a75 HZ |
298 | packet->vlan_tci = skb->vlan_tci; |
299 | ||
8a00251a | 300 | packet->is_data_pkt = true; |
4d447c9a | 301 | packet->total_data_buflen = skb->len; |
fceaf24a | 302 | |
8a00251a KS |
303 | packet->rndis_msg = (struct rndis_message *)((unsigned long)packet + |
304 | sizeof(struct hv_netvsc_packet) + | |
305 | (num_data_pgs * sizeof(struct hv_page_buffer))); | |
fceaf24a | 306 | |
454f18a9 | 307 | /* Set the completion routine */ |
72a2f5bd HZ |
308 | packet->completion.send.send_completion = netvsc_xmit_completion; |
309 | packet->completion.send.send_completion_ctx = packet; | |
310 | packet->completion.send.send_completion_tid = (unsigned long)skb; | |
fceaf24a | 311 | |
8a00251a KS |
312 | isvlan = packet->vlan_tci & VLAN_TAG_PRESENT; |
313 | ||
314 | /* Add the rndis header */ | |
315 | rndis_msg = packet->rndis_msg; | |
316 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; | |
317 | rndis_msg->msg_len = packet->total_data_buflen; | |
318 | rndis_pkt = &rndis_msg->msg.pkt; | |
319 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
320 | rndis_pkt->data_len = packet->total_data_buflen; | |
321 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
322 | ||
323 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
324 | ||
325 | if (isvlan) { | |
326 | struct ndis_pkt_8021q_info *vlan; | |
327 | ||
328 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
329 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
330 | IEEE_8021Q_INFO); | |
331 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
332 | ppi->ppi_offset); | |
333 | vlan->vlanid = packet->vlan_tci & VLAN_VID_MASK; | |
334 | vlan->pri = (packet->vlan_tci & VLAN_PRIO_MASK) >> | |
335 | VLAN_PRIO_SHIFT; | |
336 | } | |
337 | ||
338 | /* Start filling in the page buffers with the rndis hdr */ | |
339 | rndis_msg->msg_len += rndis_msg_size; | |
340 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, | |
341 | skb, &packet->page_buf[0]); | |
342 | ||
343 | ret = netvsc_send(net_device_ctx->device_ctx, packet); | |
344 | ||
02fafbc6 | 345 | if (ret == 0) { |
b852fdce SH |
346 | net->stats.tx_bytes += skb->len; |
347 | net->stats.tx_packets++; | |
b220f5f9 | 348 | } else { |
8a5f9edc | 349 | kfree(packet); |
33be96e4 HZ |
350 | if (ret != -EAGAIN) { |
351 | dev_kfree_skb_any(skb); | |
352 | net->stats.tx_dropped++; | |
353 | } | |
fceaf24a HJ |
354 | } |
355 | ||
33be96e4 | 356 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
357 | } |
358 | ||
3e189519 | 359 | /* |
02fafbc6 GKH |
360 | * netvsc_linkstatus_callback - Link up/down notification |
361 | */ | |
90ef117a | 362 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
02fafbc6 | 363 | unsigned int status) |
fceaf24a | 364 | { |
2ddd5e5f | 365 | struct net_device *net; |
c996edcf | 366 | struct net_device_context *ndev_ctx; |
2ddd5e5f | 367 | struct netvsc_device *net_device; |
891de74d | 368 | struct rndis_device *rdev; |
2ddd5e5f S |
369 | |
370 | net_device = hv_get_drvdata(device_obj); | |
891de74d HZ |
371 | rdev = net_device->extension; |
372 | ||
373 | rdev->link_state = status != 1; | |
374 | ||
2ddd5e5f | 375 | net = net_device->ndev; |
fceaf24a | 376 | |
891de74d | 377 | if (!net || net->reg_state != NETREG_REGISTERED) |
fceaf24a | 378 | return; |
fceaf24a | 379 | |
891de74d | 380 | ndev_ctx = netdev_priv(net); |
02fafbc6 | 381 | if (status == 1) { |
c4b6a2ea | 382 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
122a5f64 | 383 | schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); |
02fafbc6 | 384 | } else { |
891de74d | 385 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
fceaf24a | 386 | } |
fceaf24a HJ |
387 | } |
388 | ||
3e189519 HJ |
389 | /* |
390 | * netvsc_recv_callback - Callback when we receive a packet from the | |
391 | * "wire" on the specified device. | |
02fafbc6 | 392 | */ |
f79adf8f | 393 | int netvsc_recv_callback(struct hv_device *device_obj, |
02fafbc6 | 394 | struct hv_netvsc_packet *packet) |
fceaf24a | 395 | { |
6f4c4446 | 396 | struct net_device *net; |
fceaf24a | 397 | struct sk_buff *skb; |
fceaf24a | 398 | |
6f4c4446 | 399 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
a68f9614 | 400 | if (!net || net->reg_state != NETREG_REGISTERED) { |
63f6921d | 401 | packet->status = NVSP_STAT_FAIL; |
fceaf24a HJ |
402 | return 0; |
403 | } | |
404 | ||
9495c282 | 405 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 406 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
407 | if (unlikely(!skb)) { |
408 | ++net->stats.rx_dropped; | |
63f6921d | 409 | packet->status = NVSP_STAT_FAIL; |
9495c282 SH |
410 | return 0; |
411 | } | |
fceaf24a | 412 | |
02fafbc6 GKH |
413 | /* |
414 | * Copy to skb. This copy is needed here since the memory pointed by | |
415 | * hv_netvsc_packet cannot be deallocated | |
416 | */ | |
45326342 HZ |
417 | memcpy(skb_put(skb, packet->total_data_buflen), packet->data, |
418 | packet->total_data_buflen); | |
fceaf24a HJ |
419 | |
420 | skb->protocol = eth_type_trans(skb, net); | |
fceaf24a | 421 | skb->ip_summed = CHECKSUM_NONE; |
93725cbd HZ |
422 | if (packet->vlan_tci & VLAN_TAG_PRESENT) |
423 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
424 | packet->vlan_tci); | |
fceaf24a | 425 | |
9495c282 | 426 | net->stats.rx_packets++; |
48c38839 | 427 | net->stats.rx_bytes += packet->total_data_buflen; |
9495c282 | 428 | |
02fafbc6 GKH |
429 | /* |
430 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
431 | * is done. |
432 | * TODO - use NAPI? | |
02fafbc6 | 433 | */ |
9495c282 | 434 | netif_rx(skb); |
fceaf24a | 435 | |
fceaf24a HJ |
436 | return 0; |
437 | } | |
438 | ||
f82f4ad7 SH |
439 | static void netvsc_get_drvinfo(struct net_device *net, |
440 | struct ethtool_drvinfo *info) | |
441 | { | |
7826d43f | 442 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 443 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
444 | } |
445 | ||
4d447c9a HZ |
446 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
447 | { | |
448 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
449 | struct hv_device *hdev = ndevctx->device_ctx; | |
450 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
451 | struct netvsc_device_info device_info; | |
452 | int limit = ETH_DATA_LEN; | |
453 | ||
454 | if (nvdev == NULL || nvdev->destroy) | |
455 | return -ENODEV; | |
456 | ||
a1eabb01 | 457 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d447c9a HZ |
458 | limit = NETVSC_MTU; |
459 | ||
460 | if (mtu < 68 || mtu > limit) | |
461 | return -EINVAL; | |
462 | ||
463 | nvdev->start_remove = true; | |
792df872 | 464 | cancel_work_sync(&ndevctx->work); |
0a282538 | 465 | netif_tx_disable(ndev); |
4d447c9a HZ |
466 | rndis_filter_device_remove(hdev); |
467 | ||
468 | ndev->mtu = mtu; | |
469 | ||
470 | ndevctx->device_ctx = hdev; | |
471 | hv_set_drvdata(hdev, ndev); | |
472 | device_info.ring_size = ring_size; | |
473 | rndis_filter_device_add(hdev, &device_info); | |
474 | netif_wake_queue(ndev); | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
1ce09e89 HZ |
479 | |
480 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
481 | { | |
482 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
483 | struct hv_device *hdev = ndevctx->device_ctx; | |
484 | struct sockaddr *addr = p; | |
9a4c831e | 485 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
486 | unsigned char save_aatype; |
487 | int err; | |
488 | ||
489 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
490 | save_aatype = ndev->addr_assign_type; | |
491 | ||
492 | err = eth_mac_addr(ndev, p); | |
493 | if (err != 0) | |
494 | return err; | |
495 | ||
496 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
497 | if (err != 0) { | |
498 | /* roll back to saved MAC */ | |
499 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
500 | ndev->addr_assign_type = save_aatype; | |
501 | } | |
502 | ||
503 | return err; | |
504 | } | |
505 | ||
506 | ||
f82f4ad7 SH |
507 | static const struct ethtool_ops ethtool_ops = { |
508 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 SH |
509 | .get_link = ethtool_op_get_link, |
510 | }; | |
511 | ||
df2fff28 GKH |
512 | static const struct net_device_ops device_ops = { |
513 | .ndo_open = netvsc_open, | |
514 | .ndo_stop = netvsc_close, | |
515 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 516 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 517 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 518 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 519 | .ndo_set_mac_address = netvsc_set_mac_addr, |
df2fff28 GKH |
520 | }; |
521 | ||
c996edcf HZ |
522 | /* |
523 | * Send GARP packet to network peers after migrations. | |
524 | * After Quick Migration, the network is not immediately operational in the | |
525 | * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add | |
122a5f64 | 526 | * another netif_notify_peers() into a delayed work, otherwise GARP packet |
c996edcf | 527 | * will not be sent after quick migration, and cause network disconnection. |
891de74d | 528 | * Also, we update the carrier status here. |
c996edcf | 529 | */ |
891de74d | 530 | static void netvsc_link_change(struct work_struct *w) |
c996edcf HZ |
531 | { |
532 | struct net_device_context *ndev_ctx; | |
533 | struct net_device *net; | |
2ddd5e5f | 534 | struct netvsc_device *net_device; |
891de74d HZ |
535 | struct rndis_device *rdev; |
536 | bool notify; | |
537 | ||
538 | rtnl_lock(); | |
c996edcf | 539 | |
122a5f64 | 540 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f | 541 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
891de74d | 542 | rdev = net_device->extension; |
2ddd5e5f | 543 | net = net_device->ndev; |
891de74d HZ |
544 | |
545 | if (rdev->link_state) { | |
546 | netif_carrier_off(net); | |
547 | notify = false; | |
548 | } else { | |
549 | netif_carrier_on(net); | |
550 | notify = true; | |
551 | } | |
552 | ||
553 | rtnl_unlock(); | |
554 | ||
555 | if (notify) | |
556 | netdev_notify_peers(net); | |
c996edcf HZ |
557 | } |
558 | ||
559 | ||
84946899 S |
560 | static int netvsc_probe(struct hv_device *dev, |
561 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 562 | { |
df2fff28 GKH |
563 | struct net_device *net = NULL; |
564 | struct net_device_context *net_device_ctx; | |
565 | struct netvsc_device_info device_info; | |
566 | int ret; | |
567 | ||
546d9e10 | 568 | net = alloc_etherdev(sizeof(struct net_device_context)); |
df2fff28 | 569 | if (!net) |
51a805d0 | 570 | return -ENOMEM; |
df2fff28 | 571 | |
df2fff28 | 572 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 573 | net_device_ctx->device_ctx = dev; |
2ddd5e5f | 574 | hv_set_drvdata(dev, net); |
891de74d | 575 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 576 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 577 | |
df2fff28 GKH |
578 | net->netdev_ops = &device_ops; |
579 | ||
6048718d | 580 | /* TODO: Add GSO and Checksum offload */ |
54a7357f KS |
581 | net->hw_features = NETIF_F_SG; |
582 | net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG; | |
6048718d | 583 | |
f82f4ad7 | 584 | SET_ETHTOOL_OPS(net, ðtool_ops); |
9efd21e1 | 585 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 586 | |
692e084e HZ |
587 | /* Notify the netvsc driver of the new device */ |
588 | device_info.ring_size = ring_size; | |
589 | ret = rndis_filter_device_add(dev, &device_info); | |
590 | if (ret != 0) { | |
591 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
df2fff28 | 592 | free_netdev(net); |
2ddd5e5f | 593 | hv_set_drvdata(dev, NULL); |
692e084e | 594 | return ret; |
df2fff28 | 595 | } |
692e084e HZ |
596 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
597 | ||
a68f9614 HZ |
598 | ret = register_netdev(net); |
599 | if (ret != 0) { | |
600 | pr_err("Unable to register netdev.\n"); | |
601 | rndis_filter_device_remove(dev); | |
602 | free_netdev(net); | |
603 | } | |
604 | ||
df2fff28 GKH |
605 | return ret; |
606 | } | |
607 | ||
415b023a | 608 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 609 | { |
2ddd5e5f | 610 | struct net_device *net; |
122a5f64 | 611 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
612 | struct netvsc_device *net_device; |
613 | ||
614 | net_device = hv_get_drvdata(dev); | |
615 | net = net_device->ndev; | |
df2fff28 | 616 | |
df2fff28 | 617 | if (net == NULL) { |
415b023a | 618 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
619 | return 0; |
620 | } | |
621 | ||
4d447c9a HZ |
622 | net_device->start_remove = true; |
623 | ||
122a5f64 HZ |
624 | ndev_ctx = netdev_priv(net); |
625 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 626 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 627 | |
df2fff28 | 628 | /* Stop outbound asap */ |
0a282538 | 629 | netif_tx_disable(net); |
df2fff28 GKH |
630 | |
631 | unregister_netdev(net); | |
632 | ||
633 | /* | |
634 | * Call to the vsc driver to let it know that the device is being | |
635 | * removed | |
636 | */ | |
df06bcff | 637 | rndis_filter_device_remove(dev); |
df2fff28 GKH |
638 | |
639 | free_netdev(net); | |
df06bcff | 640 | return 0; |
df2fff28 GKH |
641 | } |
642 | ||
345c4cc3 | 643 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 644 | /* Network guid */ |
8f505944 | 645 | { HV_NIC_GUID, }, |
c45cf2d4 | 646 | { }, |
345c4cc3 S |
647 | }; |
648 | ||
649 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
650 | ||
f1542a66 | 651 | /* The one and only one */ |
fde0ef9b | 652 | static struct hv_driver netvsc_drv = { |
d31b20fc | 653 | .name = KBUILD_MODNAME, |
345c4cc3 | 654 | .id_table = id_table, |
fde0ef9b S |
655 | .probe = netvsc_probe, |
656 | .remove = netvsc_remove, | |
d4890970 | 657 | }; |
f1542a66 | 658 | |
a9869c94 | 659 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 660 | { |
768fa219 | 661 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
662 | } |
663 | ||
1fde28cf | 664 | static int __init netvsc_drv_init(void) |
df2fff28 | 665 | { |
fa85a6c2 HZ |
666 | if (ring_size < RING_SIZE_MIN) { |
667 | ring_size = RING_SIZE_MIN; | |
668 | pr_info("Increased ring_size to %d (min allowed)\n", | |
669 | ring_size); | |
670 | } | |
768fa219 | 671 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
672 | } |
673 | ||
26c14cc1 | 674 | MODULE_LICENSE("GPL"); |
7880fc54 | 675 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 676 | |
1fde28cf | 677 | module_init(netvsc_drv_init); |
a9869c94 | 678 | module_exit(netvsc_drv_exit); |