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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 | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
d0e94d17 | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 19 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 20 | */ |
eb335bc4 HJ |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
fceaf24a | 23 | #include <linux/init.h> |
9079ce69 | 24 | #include <linux/atomic.h> |
fceaf24a HJ |
25 | #include <linux/module.h> |
26 | #include <linux/highmem.h> | |
27 | #include <linux/device.h> | |
fceaf24a | 28 | #include <linux/io.h> |
fceaf24a HJ |
29 | #include <linux/delay.h> |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/inetdevice.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/skbuff.h> | |
c802db11 | 34 | #include <linux/if_vlan.h> |
fceaf24a | 35 | #include <linux/in.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
fceaf24a HJ |
37 | #include <net/arp.h> |
38 | #include <net/route.h> | |
39 | #include <net/sock.h> | |
40 | #include <net/pkt_sched.h> | |
3f335ea2 | 41 | |
5ca7252a | 42 | #include "hyperv_net.h" |
fceaf24a | 43 | |
fceaf24a | 44 | struct net_device_context { |
02fafbc6 | 45 | /* point back to our device context */ |
6bad88da | 46 | struct hv_device *device_ctx; |
122a5f64 | 47 | struct delayed_work dwork; |
792df872 | 48 | struct work_struct work; |
fceaf24a HJ |
49 | }; |
50 | ||
fa85a6c2 | 51 | #define RING_SIZE_MIN 64 |
99c8da0f | 52 | static int ring_size = 128; |
450d7a4b SH |
53 | module_param(ring_size, int, S_IRUGO); |
54 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 55 | |
d426b2e3 HZ |
56 | static void do_set_multicast(struct work_struct *w) |
57 | { | |
792df872 WM |
58 | struct net_device_context *ndevctx = |
59 | container_of(w, struct net_device_context, work); | |
d426b2e3 HZ |
60 | struct netvsc_device *nvdev; |
61 | struct rndis_device *rdev; | |
62 | ||
63 | nvdev = hv_get_drvdata(ndevctx->device_ctx); | |
792df872 WM |
64 | if (nvdev == NULL || nvdev->ndev == NULL) |
65 | return; | |
d426b2e3 HZ |
66 | |
67 | rdev = nvdev->extension; | |
68 | if (rdev == NULL) | |
792df872 | 69 | return; |
d426b2e3 | 70 | |
792df872 | 71 | if (nvdev->ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
72 | rndis_filter_set_packet_filter(rdev, |
73 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
74 | else | |
75 | rndis_filter_set_packet_filter(rdev, | |
76 | NDIS_PACKET_TYPE_BROADCAST | | |
77 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
78 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
79 | } |
80 | ||
4e9bfefa | 81 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 82 | { |
792df872 | 83 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 84 | |
792df872 | 85 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
86 | } |
87 | ||
fceaf24a HJ |
88 | static int netvsc_open(struct net_device *net) |
89 | { | |
fceaf24a | 90 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 91 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 92 | int ret = 0; |
fceaf24a | 93 | |
d515d0ff HZ |
94 | /* Open up the device */ |
95 | ret = rndis_filter_open(device_obj); | |
96 | if (ret != 0) { | |
97 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
98 | return ret; | |
fceaf24a HJ |
99 | } |
100 | ||
d515d0ff HZ |
101 | netif_start_queue(net); |
102 | ||
fceaf24a HJ |
103 | return ret; |
104 | } | |
105 | ||
fceaf24a HJ |
106 | static int netvsc_close(struct net_device *net) |
107 | { | |
fceaf24a | 108 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 109 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 110 | int ret; |
fceaf24a | 111 | |
0a282538 | 112 | netif_tx_disable(net); |
fceaf24a | 113 | |
792df872 WM |
114 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
115 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 116 | ret = rndis_filter_close(device_obj); |
fceaf24a | 117 | if (ret != 0) |
eb335bc4 | 118 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
fceaf24a | 119 | |
fceaf24a HJ |
120 | return ret; |
121 | } | |
122 | ||
fceaf24a HJ |
123 | static void netvsc_xmit_completion(void *context) |
124 | { | |
4193d4f4 | 125 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 | 126 | struct sk_buff *skb = (struct sk_buff *) |
72a2f5bd | 127 | (unsigned long)packet->completion.send.send_completion_tid; |
fceaf24a | 128 | |
fceaf24a HJ |
129 | kfree(packet); |
130 | ||
1d06825b | 131 | if (skb) |
b220f5f9 | 132 | dev_kfree_skb_any(skb); |
fceaf24a HJ |
133 | } |
134 | ||
02fafbc6 | 135 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 136 | { |
fceaf24a | 137 | struct net_device_context *net_device_ctx = netdev_priv(net); |
4193d4f4 | 138 | struct hv_netvsc_packet *packet; |
02fafbc6 | 139 | int ret; |
4d447c9a | 140 | unsigned int i, num_pages, npg_data; |
fceaf24a | 141 | |
c31c151b | 142 | /* Add multipages for skb->data and additional 2 for RNDIS */ |
4d447c9a HZ |
143 | npg_data = (((unsigned long)skb->data + skb_headlen(skb) - 1) |
144 | >> PAGE_SHIFT) - ((unsigned long)skb->data >> PAGE_SHIFT) + 1; | |
c31c151b | 145 | num_pages = skb_shinfo(skb)->nr_frags + npg_data + 2; |
fceaf24a | 146 | |
454f18a9 | 147 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 | 148 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
6048718d | 149 | (num_pages * sizeof(struct hv_page_buffer)) + |
1f5f3a75 HZ |
150 | sizeof(struct rndis_filter_packet) + |
151 | NDIS_VLAN_PPI_SIZE, GFP_ATOMIC); | |
02fafbc6 | 152 | if (!packet) { |
bf769375 | 153 | /* out of memory, drop packet */ |
eb335bc4 | 154 | netdev_err(net, "unable to allocate hv_netvsc_packet\n"); |
b220f5f9 SH |
155 | |
156 | dev_kfree_skb(skb); | |
157 | net->stats.tx_dropped++; | |
bb6d5e76 | 158 | return NETDEV_TX_OK; |
fceaf24a HJ |
159 | } |
160 | ||
1f5f3a75 HZ |
161 | packet->vlan_tci = skb->vlan_tci; |
162 | ||
72a2f5bd | 163 | packet->extension = (void *)(unsigned long)packet + |
02fafbc6 | 164 | sizeof(struct hv_netvsc_packet) + |
6048718d | 165 | (num_pages * sizeof(struct hv_page_buffer)); |
fceaf24a | 166 | |
c31c151b HZ |
167 | /* If the rndis msg goes beyond 1 page, we will add 1 later */ |
168 | packet->page_buf_cnt = num_pages - 1; | |
fceaf24a | 169 | |
454f18a9 | 170 | /* Initialize it from the skb */ |
4d447c9a | 171 | packet->total_data_buflen = skb->len; |
fceaf24a | 172 | |
6048718d | 173 | /* Start filling in the page buffers starting after RNDIS buffer. */ |
ca623ad3 HZ |
174 | packet->page_buf[1].pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
175 | packet->page_buf[1].offset | |
6048718d | 176 | = (unsigned long)skb->data & (PAGE_SIZE - 1); |
4d447c9a HZ |
177 | if (npg_data == 1) |
178 | packet->page_buf[1].len = skb_headlen(skb); | |
179 | else | |
180 | packet->page_buf[1].len = PAGE_SIZE | |
181 | - packet->page_buf[1].offset; | |
182 | ||
183 | for (i = 2; i <= npg_data; i++) { | |
184 | packet->page_buf[i].pfn = virt_to_phys(skb->data | |
185 | + PAGE_SIZE * (i-1)) >> PAGE_SHIFT; | |
186 | packet->page_buf[i].offset = 0; | |
187 | packet->page_buf[i].len = PAGE_SIZE; | |
188 | } | |
189 | if (npg_data > 1) | |
190 | packet->page_buf[npg_data].len = (((unsigned long)skb->data | |
191 | + skb_headlen(skb) - 1) & (PAGE_SIZE - 1)) + 1; | |
6048718d SH |
192 | |
193 | /* Additional fragments are after SKB data */ | |
194 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 195 | const skb_frag_t *f = &skb_shinfo(skb)->frags[i]; |
6048718d | 196 | |
4d447c9a HZ |
197 | packet->page_buf[i+npg_data+1].pfn = |
198 | page_to_pfn(skb_frag_page(f)); | |
199 | packet->page_buf[i+npg_data+1].offset = f->page_offset; | |
200 | packet->page_buf[i+npg_data+1].len = skb_frag_size(f); | |
fceaf24a HJ |
201 | } |
202 | ||
454f18a9 | 203 | /* Set the completion routine */ |
72a2f5bd HZ |
204 | packet->completion.send.send_completion = netvsc_xmit_completion; |
205 | packet->completion.send.send_completion_ctx = packet; | |
206 | packet->completion.send.send_completion_tid = (unsigned long)skb; | |
fceaf24a | 207 | |
55acb696 | 208 | ret = rndis_filter_send(net_device_ctx->device_ctx, |
02fafbc6 | 209 | packet); |
02fafbc6 | 210 | if (ret == 0) { |
b852fdce SH |
211 | net->stats.tx_bytes += skb->len; |
212 | net->stats.tx_packets++; | |
b220f5f9 | 213 | } else { |
8a5f9edc | 214 | kfree(packet); |
33be96e4 HZ |
215 | if (ret != -EAGAIN) { |
216 | dev_kfree_skb_any(skb); | |
217 | net->stats.tx_dropped++; | |
218 | } | |
fceaf24a HJ |
219 | } |
220 | ||
33be96e4 | 221 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
222 | } |
223 | ||
3e189519 | 224 | /* |
02fafbc6 GKH |
225 | * netvsc_linkstatus_callback - Link up/down notification |
226 | */ | |
90ef117a | 227 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
02fafbc6 | 228 | unsigned int status) |
fceaf24a | 229 | { |
2ddd5e5f | 230 | struct net_device *net; |
c996edcf | 231 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
232 | struct netvsc_device *net_device; |
233 | ||
234 | net_device = hv_get_drvdata(device_obj); | |
235 | net = net_device->ndev; | |
fceaf24a | 236 | |
02fafbc6 | 237 | if (!net) { |
eb335bc4 HJ |
238 | netdev_err(net, "got link status but net device " |
239 | "not initialized yet\n"); | |
fceaf24a HJ |
240 | return; |
241 | } | |
242 | ||
02fafbc6 | 243 | if (status == 1) { |
fceaf24a | 244 | netif_carrier_on(net); |
c996edcf | 245 | ndev_ctx = netdev_priv(net); |
c4b6a2ea | 246 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
122a5f64 | 247 | schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); |
02fafbc6 | 248 | } else { |
fceaf24a | 249 | netif_carrier_off(net); |
fceaf24a | 250 | } |
fceaf24a HJ |
251 | } |
252 | ||
3e189519 HJ |
253 | /* |
254 | * netvsc_recv_callback - Callback when we receive a packet from the | |
255 | * "wire" on the specified device. | |
02fafbc6 | 256 | */ |
f79adf8f | 257 | int netvsc_recv_callback(struct hv_device *device_obj, |
02fafbc6 | 258 | struct hv_netvsc_packet *packet) |
fceaf24a | 259 | { |
6f4c4446 | 260 | struct net_device *net; |
fceaf24a | 261 | struct sk_buff *skb; |
fceaf24a | 262 | |
6f4c4446 | 263 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
02fafbc6 | 264 | if (!net) { |
eb335bc4 HJ |
265 | netdev_err(net, "got receive callback but net device" |
266 | " not initialized yet\n"); | |
63f6921d | 267 | packet->status = NVSP_STAT_FAIL; |
fceaf24a HJ |
268 | return 0; |
269 | } | |
270 | ||
9495c282 | 271 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 272 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
273 | if (unlikely(!skb)) { |
274 | ++net->stats.rx_dropped; | |
63f6921d | 275 | packet->status = NVSP_STAT_FAIL; |
9495c282 SH |
276 | return 0; |
277 | } | |
fceaf24a | 278 | |
02fafbc6 GKH |
279 | /* |
280 | * Copy to skb. This copy is needed here since the memory pointed by | |
281 | * hv_netvsc_packet cannot be deallocated | |
282 | */ | |
45326342 HZ |
283 | memcpy(skb_put(skb, packet->total_data_buflen), packet->data, |
284 | packet->total_data_buflen); | |
fceaf24a HJ |
285 | |
286 | skb->protocol = eth_type_trans(skb, net); | |
fceaf24a | 287 | skb->ip_summed = CHECKSUM_NONE; |
93725cbd HZ |
288 | if (packet->vlan_tci & VLAN_TAG_PRESENT) |
289 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
290 | packet->vlan_tci); | |
fceaf24a | 291 | |
9495c282 | 292 | net->stats.rx_packets++; |
48c38839 | 293 | net->stats.rx_bytes += packet->total_data_buflen; |
9495c282 | 294 | |
02fafbc6 GKH |
295 | /* |
296 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
297 | * is done. |
298 | * TODO - use NAPI? | |
02fafbc6 | 299 | */ |
9495c282 | 300 | netif_rx(skb); |
fceaf24a | 301 | |
fceaf24a HJ |
302 | return 0; |
303 | } | |
304 | ||
f82f4ad7 SH |
305 | static void netvsc_get_drvinfo(struct net_device *net, |
306 | struct ethtool_drvinfo *info) | |
307 | { | |
7826d43f | 308 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 309 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
310 | } |
311 | ||
4d447c9a HZ |
312 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
313 | { | |
314 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
315 | struct hv_device *hdev = ndevctx->device_ctx; | |
316 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
317 | struct netvsc_device_info device_info; | |
318 | int limit = ETH_DATA_LEN; | |
319 | ||
320 | if (nvdev == NULL || nvdev->destroy) | |
321 | return -ENODEV; | |
322 | ||
323 | if (nvdev->nvsp_version == NVSP_PROTOCOL_VERSION_2) | |
324 | limit = NETVSC_MTU; | |
325 | ||
326 | if (mtu < 68 || mtu > limit) | |
327 | return -EINVAL; | |
328 | ||
329 | nvdev->start_remove = true; | |
792df872 | 330 | cancel_work_sync(&ndevctx->work); |
0a282538 | 331 | netif_tx_disable(ndev); |
4d447c9a HZ |
332 | rndis_filter_device_remove(hdev); |
333 | ||
334 | ndev->mtu = mtu; | |
335 | ||
336 | ndevctx->device_ctx = hdev; | |
337 | hv_set_drvdata(hdev, ndev); | |
338 | device_info.ring_size = ring_size; | |
339 | rndis_filter_device_add(hdev, &device_info); | |
340 | netif_wake_queue(ndev); | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
1ce09e89 HZ |
345 | |
346 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
347 | { | |
348 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
349 | struct hv_device *hdev = ndevctx->device_ctx; | |
350 | struct sockaddr *addr = p; | |
9a4c831e | 351 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
352 | unsigned char save_aatype; |
353 | int err; | |
354 | ||
355 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
356 | save_aatype = ndev->addr_assign_type; | |
357 | ||
358 | err = eth_mac_addr(ndev, p); | |
359 | if (err != 0) | |
360 | return err; | |
361 | ||
362 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
363 | if (err != 0) { | |
364 | /* roll back to saved MAC */ | |
365 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
366 | ndev->addr_assign_type = save_aatype; | |
367 | } | |
368 | ||
369 | return err; | |
370 | } | |
371 | ||
372 | ||
f82f4ad7 SH |
373 | static const struct ethtool_ops ethtool_ops = { |
374 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 SH |
375 | .get_link = ethtool_op_get_link, |
376 | }; | |
377 | ||
df2fff28 GKH |
378 | static const struct net_device_ops device_ops = { |
379 | .ndo_open = netvsc_open, | |
380 | .ndo_stop = netvsc_close, | |
381 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 382 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 383 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 384 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 385 | .ndo_set_mac_address = netvsc_set_mac_addr, |
df2fff28 GKH |
386 | }; |
387 | ||
c996edcf HZ |
388 | /* |
389 | * Send GARP packet to network peers after migrations. | |
390 | * After Quick Migration, the network is not immediately operational in the | |
391 | * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add | |
122a5f64 | 392 | * another netif_notify_peers() into a delayed work, otherwise GARP packet |
c996edcf HZ |
393 | * will not be sent after quick migration, and cause network disconnection. |
394 | */ | |
395 | static void netvsc_send_garp(struct work_struct *w) | |
396 | { | |
397 | struct net_device_context *ndev_ctx; | |
398 | struct net_device *net; | |
2ddd5e5f | 399 | struct netvsc_device *net_device; |
c996edcf | 400 | |
122a5f64 | 401 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f S |
402 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
403 | net = net_device->ndev; | |
ee89bab1 | 404 | netdev_notify_peers(net); |
c996edcf HZ |
405 | } |
406 | ||
407 | ||
84946899 S |
408 | static int netvsc_probe(struct hv_device *dev, |
409 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 410 | { |
df2fff28 GKH |
411 | struct net_device *net = NULL; |
412 | struct net_device_context *net_device_ctx; | |
413 | struct netvsc_device_info device_info; | |
414 | int ret; | |
415 | ||
546d9e10 | 416 | net = alloc_etherdev(sizeof(struct net_device_context)); |
df2fff28 | 417 | if (!net) |
51a805d0 | 418 | return -ENOMEM; |
df2fff28 GKH |
419 | |
420 | /* Set initial state */ | |
421 | netif_carrier_off(net); | |
df2fff28 GKH |
422 | |
423 | net_device_ctx = netdev_priv(net); | |
9efd21e1 | 424 | net_device_ctx->device_ctx = dev; |
2ddd5e5f | 425 | hv_set_drvdata(dev, net); |
122a5f64 | 426 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_send_garp); |
792df872 | 427 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 428 | |
df2fff28 GKH |
429 | net->netdev_ops = &device_ops; |
430 | ||
6048718d | 431 | /* TODO: Add GSO and Checksum offload */ |
f4570820 HZ |
432 | net->hw_features = 0; |
433 | net->features = NETIF_F_HW_VLAN_CTAG_TX; | |
6048718d | 434 | |
f82f4ad7 | 435 | SET_ETHTOOL_OPS(net, ðtool_ops); |
9efd21e1 | 436 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 GKH |
437 | |
438 | ret = register_netdev(net); | |
439 | if (ret != 0) { | |
692e084e | 440 | pr_err("Unable to register netdev.\n"); |
df2fff28 | 441 | free_netdev(net); |
692e084e | 442 | goto out; |
df2fff28 GKH |
443 | } |
444 | ||
692e084e HZ |
445 | /* Notify the netvsc driver of the new device */ |
446 | device_info.ring_size = ring_size; | |
447 | ret = rndis_filter_device_add(dev, &device_info); | |
448 | if (ret != 0) { | |
449 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
450 | unregister_netdev(net); | |
df2fff28 | 451 | free_netdev(net); |
2ddd5e5f | 452 | hv_set_drvdata(dev, NULL); |
692e084e | 453 | return ret; |
df2fff28 | 454 | } |
692e084e HZ |
455 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
456 | ||
457 | netif_carrier_on(net); | |
df2fff28 | 458 | |
692e084e | 459 | out: |
df2fff28 GKH |
460 | return ret; |
461 | } | |
462 | ||
415b023a | 463 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 464 | { |
2ddd5e5f | 465 | struct net_device *net; |
122a5f64 | 466 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
467 | struct netvsc_device *net_device; |
468 | ||
469 | net_device = hv_get_drvdata(dev); | |
470 | net = net_device->ndev; | |
df2fff28 | 471 | |
df2fff28 | 472 | if (net == NULL) { |
415b023a | 473 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
474 | return 0; |
475 | } | |
476 | ||
4d447c9a HZ |
477 | net_device->start_remove = true; |
478 | ||
122a5f64 HZ |
479 | ndev_ctx = netdev_priv(net); |
480 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 481 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 482 | |
df2fff28 | 483 | /* Stop outbound asap */ |
0a282538 | 484 | netif_tx_disable(net); |
df2fff28 GKH |
485 | |
486 | unregister_netdev(net); | |
487 | ||
488 | /* | |
489 | * Call to the vsc driver to let it know that the device is being | |
490 | * removed | |
491 | */ | |
df06bcff | 492 | rndis_filter_device_remove(dev); |
df2fff28 GKH |
493 | |
494 | free_netdev(net); | |
df06bcff | 495 | return 0; |
df2fff28 GKH |
496 | } |
497 | ||
345c4cc3 | 498 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 499 | /* Network guid */ |
8f505944 | 500 | { HV_NIC_GUID, }, |
c45cf2d4 | 501 | { }, |
345c4cc3 S |
502 | }; |
503 | ||
504 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
505 | ||
f1542a66 | 506 | /* The one and only one */ |
fde0ef9b | 507 | static struct hv_driver netvsc_drv = { |
d31b20fc | 508 | .name = KBUILD_MODNAME, |
345c4cc3 | 509 | .id_table = id_table, |
fde0ef9b S |
510 | .probe = netvsc_probe, |
511 | .remove = netvsc_remove, | |
d4890970 | 512 | }; |
f1542a66 | 513 | |
a9869c94 | 514 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 515 | { |
768fa219 | 516 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
517 | } |
518 | ||
1fde28cf | 519 | static int __init netvsc_drv_init(void) |
df2fff28 | 520 | { |
fa85a6c2 HZ |
521 | if (ring_size < RING_SIZE_MIN) { |
522 | ring_size = RING_SIZE_MIN; | |
523 | pr_info("Increased ring_size to %d (min allowed)\n", | |
524 | ring_size); | |
525 | } | |
768fa219 | 526 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
527 | } |
528 | ||
26c14cc1 | 529 | MODULE_LICENSE("GPL"); |
7880fc54 | 530 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 531 | |
1fde28cf | 532 | module_init(netvsc_drv_init); |
a9869c94 | 533 | module_exit(netvsc_drv_exit); |