Commit | Line | Data |
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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 | ||
43752984 | 51 | /* Restrict GSO size to account for NVGRE */ |
52 | #define NETVSC_GSO_MAX_SIZE 62768 | |
53 | ||
fa85a6c2 | 54 | #define RING_SIZE_MIN 64 |
99c8da0f | 55 | static int ring_size = 128; |
450d7a4b SH |
56 | module_param(ring_size, int, S_IRUGO); |
57 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 58 | |
d426b2e3 HZ |
59 | static void do_set_multicast(struct work_struct *w) |
60 | { | |
792df872 WM |
61 | struct net_device_context *ndevctx = |
62 | container_of(w, struct net_device_context, work); | |
d426b2e3 HZ |
63 | struct netvsc_device *nvdev; |
64 | struct rndis_device *rdev; | |
65 | ||
66 | nvdev = hv_get_drvdata(ndevctx->device_ctx); | |
792df872 WM |
67 | if (nvdev == NULL || nvdev->ndev == NULL) |
68 | return; | |
d426b2e3 HZ |
69 | |
70 | rdev = nvdev->extension; | |
71 | if (rdev == NULL) | |
792df872 | 72 | return; |
d426b2e3 | 73 | |
792df872 | 74 | if (nvdev->ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
75 | rndis_filter_set_packet_filter(rdev, |
76 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
77 | else | |
78 | rndis_filter_set_packet_filter(rdev, | |
79 | NDIS_PACKET_TYPE_BROADCAST | | |
80 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
81 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
82 | } |
83 | ||
4e9bfefa | 84 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 85 | { |
792df872 | 86 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 87 | |
792df872 | 88 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
89 | } |
90 | ||
fceaf24a HJ |
91 | static int netvsc_open(struct net_device *net) |
92 | { | |
fceaf24a | 93 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 94 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 95 | int ret = 0; |
fceaf24a | 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 | ||
fceaf24a HJ |
106 | return ret; |
107 | } | |
108 | ||
fceaf24a HJ |
109 | static int netvsc_close(struct net_device *net) |
110 | { | |
fceaf24a | 111 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 112 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 113 | int ret; |
fceaf24a | 114 | |
0a282538 | 115 | netif_tx_disable(net); |
fceaf24a | 116 | |
792df872 WM |
117 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
118 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 119 | ret = rndis_filter_close(device_obj); |
fceaf24a | 120 | if (ret != 0) |
eb335bc4 | 121 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
fceaf24a | 122 | |
fceaf24a HJ |
123 | return ret; |
124 | } | |
125 | ||
fceaf24a HJ |
126 | static void netvsc_xmit_completion(void *context) |
127 | { | |
4193d4f4 | 128 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 | 129 | struct sk_buff *skb = (struct sk_buff *) |
72a2f5bd | 130 | (unsigned long)packet->completion.send.send_completion_tid; |
fceaf24a | 131 | |
fceaf24a HJ |
132 | kfree(packet); |
133 | ||
1d06825b | 134 | if (skb) |
b220f5f9 | 135 | dev_kfree_skb_any(skb); |
fceaf24a HJ |
136 | } |
137 | ||
02fafbc6 | 138 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 139 | { |
fceaf24a | 140 | struct net_device_context *net_device_ctx = netdev_priv(net); |
4193d4f4 | 141 | struct hv_netvsc_packet *packet; |
02fafbc6 | 142 | int ret; |
4d447c9a | 143 | unsigned int i, num_pages, npg_data; |
f9aceca3 | 144 | u32 skb_length = skb->len; |
fceaf24a | 145 | |
c31c151b | 146 | /* Add multipages for skb->data and additional 2 for RNDIS */ |
4d447c9a HZ |
147 | npg_data = (((unsigned long)skb->data + skb_headlen(skb) - 1) |
148 | >> PAGE_SHIFT) - ((unsigned long)skb->data >> PAGE_SHIFT) + 1; | |
c31c151b | 149 | num_pages = skb_shinfo(skb)->nr_frags + npg_data + 2; |
fceaf24a | 150 | |
454f18a9 | 151 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 | 152 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
6048718d | 153 | (num_pages * sizeof(struct hv_page_buffer)) + |
1f5f3a75 HZ |
154 | sizeof(struct rndis_filter_packet) + |
155 | NDIS_VLAN_PPI_SIZE, GFP_ATOMIC); | |
02fafbc6 | 156 | if (!packet) { |
bf769375 | 157 | /* out of memory, drop packet */ |
eb335bc4 | 158 | netdev_err(net, "unable to allocate hv_netvsc_packet\n"); |
b220f5f9 SH |
159 | |
160 | dev_kfree_skb(skb); | |
161 | net->stats.tx_dropped++; | |
bb6d5e76 | 162 | return NETDEV_TX_OK; |
fceaf24a HJ |
163 | } |
164 | ||
1f5f3a75 HZ |
165 | packet->vlan_tci = skb->vlan_tci; |
166 | ||
72a2f5bd | 167 | packet->extension = (void *)(unsigned long)packet + |
02fafbc6 | 168 | sizeof(struct hv_netvsc_packet) + |
6048718d | 169 | (num_pages * sizeof(struct hv_page_buffer)); |
fceaf24a | 170 | |
c31c151b HZ |
171 | /* If the rndis msg goes beyond 1 page, we will add 1 later */ |
172 | packet->page_buf_cnt = num_pages - 1; | |
fceaf24a | 173 | |
454f18a9 | 174 | /* Initialize it from the skb */ |
4d447c9a | 175 | packet->total_data_buflen = skb->len; |
fceaf24a | 176 | |
6048718d | 177 | /* Start filling in the page buffers starting after RNDIS buffer. */ |
ca623ad3 HZ |
178 | packet->page_buf[1].pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
179 | packet->page_buf[1].offset | |
6048718d | 180 | = (unsigned long)skb->data & (PAGE_SIZE - 1); |
4d447c9a HZ |
181 | if (npg_data == 1) |
182 | packet->page_buf[1].len = skb_headlen(skb); | |
183 | else | |
184 | packet->page_buf[1].len = PAGE_SIZE | |
185 | - packet->page_buf[1].offset; | |
186 | ||
187 | for (i = 2; i <= npg_data; i++) { | |
188 | packet->page_buf[i].pfn = virt_to_phys(skb->data | |
189 | + PAGE_SIZE * (i-1)) >> PAGE_SHIFT; | |
190 | packet->page_buf[i].offset = 0; | |
191 | packet->page_buf[i].len = PAGE_SIZE; | |
192 | } | |
193 | if (npg_data > 1) | |
194 | packet->page_buf[npg_data].len = (((unsigned long)skb->data | |
195 | + skb_headlen(skb) - 1) & (PAGE_SIZE - 1)) + 1; | |
6048718d SH |
196 | |
197 | /* Additional fragments are after SKB data */ | |
198 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 199 | const skb_frag_t *f = &skb_shinfo(skb)->frags[i]; |
6048718d | 200 | |
4d447c9a HZ |
201 | packet->page_buf[i+npg_data+1].pfn = |
202 | page_to_pfn(skb_frag_page(f)); | |
203 | packet->page_buf[i+npg_data+1].offset = f->page_offset; | |
204 | packet->page_buf[i+npg_data+1].len = skb_frag_size(f); | |
fceaf24a HJ |
205 | } |
206 | ||
454f18a9 | 207 | /* Set the completion routine */ |
72a2f5bd HZ |
208 | packet->completion.send.send_completion = netvsc_xmit_completion; |
209 | packet->completion.send.send_completion_ctx = packet; | |
210 | packet->completion.send.send_completion_tid = (unsigned long)skb; | |
fceaf24a | 211 | |
55acb696 | 212 | ret = rndis_filter_send(net_device_ctx->device_ctx, |
02fafbc6 | 213 | packet); |
02fafbc6 | 214 | if (ret == 0) { |
f9aceca3 | 215 | net->stats.tx_bytes += skb_length; |
b852fdce | 216 | net->stats.tx_packets++; |
b220f5f9 | 217 | } else { |
8a5f9edc | 218 | kfree(packet); |
33be96e4 HZ |
219 | if (ret != -EAGAIN) { |
220 | dev_kfree_skb_any(skb); | |
221 | net->stats.tx_dropped++; | |
222 | } | |
fceaf24a HJ |
223 | } |
224 | ||
33be96e4 | 225 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
226 | } |
227 | ||
3e189519 | 228 | /* |
02fafbc6 GKH |
229 | * netvsc_linkstatus_callback - Link up/down notification |
230 | */ | |
90ef117a | 231 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
02fafbc6 | 232 | unsigned int status) |
fceaf24a | 233 | { |
2ddd5e5f | 234 | struct net_device *net; |
c996edcf | 235 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
236 | struct netvsc_device *net_device; |
237 | ||
238 | net_device = hv_get_drvdata(device_obj); | |
239 | net = net_device->ndev; | |
fceaf24a | 240 | |
02fafbc6 | 241 | if (!net) { |
eb335bc4 HJ |
242 | netdev_err(net, "got link status but net device " |
243 | "not initialized yet\n"); | |
fceaf24a HJ |
244 | return; |
245 | } | |
246 | ||
02fafbc6 | 247 | if (status == 1) { |
fceaf24a | 248 | netif_carrier_on(net); |
c996edcf | 249 | ndev_ctx = netdev_priv(net); |
c4b6a2ea | 250 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
122a5f64 | 251 | schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); |
02fafbc6 | 252 | } else { |
fceaf24a | 253 | netif_carrier_off(net); |
fceaf24a | 254 | } |
fceaf24a HJ |
255 | } |
256 | ||
3e189519 HJ |
257 | /* |
258 | * netvsc_recv_callback - Callback when we receive a packet from the | |
259 | * "wire" on the specified device. | |
02fafbc6 | 260 | */ |
f79adf8f | 261 | int netvsc_recv_callback(struct hv_device *device_obj, |
02fafbc6 | 262 | struct hv_netvsc_packet *packet) |
fceaf24a | 263 | { |
6f4c4446 | 264 | struct net_device *net; |
fceaf24a | 265 | struct sk_buff *skb; |
fceaf24a | 266 | |
6f4c4446 | 267 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
02fafbc6 | 268 | if (!net) { |
eb335bc4 HJ |
269 | netdev_err(net, "got receive callback but net device" |
270 | " not initialized yet\n"); | |
63f6921d | 271 | packet->status = NVSP_STAT_FAIL; |
fceaf24a HJ |
272 | return 0; |
273 | } | |
274 | ||
9495c282 | 275 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 276 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
277 | if (unlikely(!skb)) { |
278 | ++net->stats.rx_dropped; | |
63f6921d | 279 | packet->status = NVSP_STAT_FAIL; |
9495c282 SH |
280 | return 0; |
281 | } | |
fceaf24a | 282 | |
02fafbc6 GKH |
283 | /* |
284 | * Copy to skb. This copy is needed here since the memory pointed by | |
285 | * hv_netvsc_packet cannot be deallocated | |
286 | */ | |
45326342 HZ |
287 | memcpy(skb_put(skb, packet->total_data_buflen), packet->data, |
288 | packet->total_data_buflen); | |
fceaf24a HJ |
289 | |
290 | skb->protocol = eth_type_trans(skb, net); | |
fceaf24a | 291 | skb->ip_summed = CHECKSUM_NONE; |
93725cbd HZ |
292 | if (packet->vlan_tci & VLAN_TAG_PRESENT) |
293 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
294 | packet->vlan_tci); | |
fceaf24a | 295 | |
9495c282 | 296 | net->stats.rx_packets++; |
48c38839 | 297 | net->stats.rx_bytes += packet->total_data_buflen; |
9495c282 | 298 | |
02fafbc6 GKH |
299 | /* |
300 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
301 | * is done. |
302 | * TODO - use NAPI? | |
02fafbc6 | 303 | */ |
9495c282 | 304 | netif_rx(skb); |
fceaf24a | 305 | |
fceaf24a HJ |
306 | return 0; |
307 | } | |
308 | ||
f82f4ad7 SH |
309 | static void netvsc_get_drvinfo(struct net_device *net, |
310 | struct ethtool_drvinfo *info) | |
311 | { | |
7826d43f JP |
312 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
313 | strlcpy(info->version, HV_DRV_VERSION, sizeof(info->version)); | |
314 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
f82f4ad7 SH |
315 | } |
316 | ||
4d447c9a HZ |
317 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
318 | { | |
319 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
320 | struct hv_device *hdev = ndevctx->device_ctx; | |
321 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
322 | struct netvsc_device_info device_info; | |
323 | int limit = ETH_DATA_LEN; | |
324 | ||
325 | if (nvdev == NULL || nvdev->destroy) | |
326 | return -ENODEV; | |
327 | ||
328 | if (nvdev->nvsp_version == NVSP_PROTOCOL_VERSION_2) | |
329 | limit = NETVSC_MTU; | |
330 | ||
331 | if (mtu < 68 || mtu > limit) | |
332 | return -EINVAL; | |
333 | ||
334 | nvdev->start_remove = true; | |
792df872 | 335 | cancel_work_sync(&ndevctx->work); |
0a282538 | 336 | netif_tx_disable(ndev); |
4d447c9a HZ |
337 | rndis_filter_device_remove(hdev); |
338 | ||
339 | ndev->mtu = mtu; | |
340 | ||
341 | ndevctx->device_ctx = hdev; | |
342 | hv_set_drvdata(hdev, ndev); | |
343 | device_info.ring_size = ring_size; | |
344 | rndis_filter_device_add(hdev, &device_info); | |
345 | netif_wake_queue(ndev); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
1ce09e89 HZ |
350 | |
351 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
352 | { | |
353 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
354 | struct hv_device *hdev = ndevctx->device_ctx; | |
355 | struct sockaddr *addr = p; | |
9a4c831e | 356 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
357 | unsigned char save_aatype; |
358 | int err; | |
359 | ||
360 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
361 | save_aatype = ndev->addr_assign_type; | |
362 | ||
363 | err = eth_mac_addr(ndev, p); | |
364 | if (err != 0) | |
365 | return err; | |
366 | ||
367 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
368 | if (err != 0) { | |
369 | /* roll back to saved MAC */ | |
370 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
371 | ndev->addr_assign_type = save_aatype; | |
372 | } | |
373 | ||
374 | return err; | |
375 | } | |
376 | ||
377 | ||
f82f4ad7 SH |
378 | static const struct ethtool_ops ethtool_ops = { |
379 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 SH |
380 | .get_link = ethtool_op_get_link, |
381 | }; | |
382 | ||
df2fff28 GKH |
383 | static const struct net_device_ops device_ops = { |
384 | .ndo_open = netvsc_open, | |
385 | .ndo_stop = netvsc_close, | |
386 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 387 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 388 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 389 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 390 | .ndo_set_mac_address = netvsc_set_mac_addr, |
df2fff28 GKH |
391 | }; |
392 | ||
c996edcf HZ |
393 | /* |
394 | * Send GARP packet to network peers after migrations. | |
395 | * After Quick Migration, the network is not immediately operational in the | |
396 | * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add | |
122a5f64 | 397 | * another netif_notify_peers() into a delayed work, otherwise GARP packet |
c996edcf HZ |
398 | * will not be sent after quick migration, and cause network disconnection. |
399 | */ | |
400 | static void netvsc_send_garp(struct work_struct *w) | |
401 | { | |
402 | struct net_device_context *ndev_ctx; | |
403 | struct net_device *net; | |
2ddd5e5f | 404 | struct netvsc_device *net_device; |
c996edcf | 405 | |
122a5f64 | 406 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f S |
407 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
408 | net = net_device->ndev; | |
ee89bab1 | 409 | netdev_notify_peers(net); |
c996edcf HZ |
410 | } |
411 | ||
412 | ||
84946899 S |
413 | static int netvsc_probe(struct hv_device *dev, |
414 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 415 | { |
df2fff28 GKH |
416 | struct net_device *net = NULL; |
417 | struct net_device_context *net_device_ctx; | |
418 | struct netvsc_device_info device_info; | |
419 | int ret; | |
420 | ||
546d9e10 | 421 | net = alloc_etherdev(sizeof(struct net_device_context)); |
df2fff28 | 422 | if (!net) |
51a805d0 | 423 | return -ENOMEM; |
df2fff28 GKH |
424 | |
425 | /* Set initial state */ | |
426 | netif_carrier_off(net); | |
df2fff28 GKH |
427 | |
428 | net_device_ctx = netdev_priv(net); | |
9efd21e1 | 429 | net_device_ctx->device_ctx = dev; |
2ddd5e5f | 430 | hv_set_drvdata(dev, net); |
122a5f64 | 431 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_send_garp); |
792df872 | 432 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 433 | |
df2fff28 GKH |
434 | net->netdev_ops = &device_ops; |
435 | ||
6048718d | 436 | /* TODO: Add GSO and Checksum offload */ |
98bec4a1 HZ |
437 | net->hw_features = 0; |
438 | net->features = NETIF_F_HW_VLAN_CTAG_TX; | |
6048718d | 439 | |
f82f4ad7 | 440 | SET_ETHTOOL_OPS(net, ðtool_ops); |
9efd21e1 | 441 | SET_NETDEV_DEV(net, &dev->device); |
43752984 | 442 | netif_set_gso_max_size(net, NETVSC_GSO_MAX_SIZE); |
df2fff28 GKH |
443 | |
444 | ret = register_netdev(net); | |
445 | if (ret != 0) { | |
692e084e | 446 | pr_err("Unable to register netdev.\n"); |
df2fff28 | 447 | free_netdev(net); |
692e084e | 448 | goto out; |
df2fff28 GKH |
449 | } |
450 | ||
692e084e HZ |
451 | /* Notify the netvsc driver of the new device */ |
452 | device_info.ring_size = ring_size; | |
453 | ret = rndis_filter_device_add(dev, &device_info); | |
454 | if (ret != 0) { | |
455 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
456 | unregister_netdev(net); | |
df2fff28 | 457 | free_netdev(net); |
2ddd5e5f | 458 | hv_set_drvdata(dev, NULL); |
692e084e | 459 | return ret; |
df2fff28 | 460 | } |
692e084e HZ |
461 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
462 | ||
463 | netif_carrier_on(net); | |
df2fff28 | 464 | |
692e084e | 465 | out: |
df2fff28 GKH |
466 | return ret; |
467 | } | |
468 | ||
415b023a | 469 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 470 | { |
2ddd5e5f | 471 | struct net_device *net; |
122a5f64 | 472 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
473 | struct netvsc_device *net_device; |
474 | ||
475 | net_device = hv_get_drvdata(dev); | |
476 | net = net_device->ndev; | |
df2fff28 | 477 | |
df2fff28 | 478 | if (net == NULL) { |
415b023a | 479 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
480 | return 0; |
481 | } | |
482 | ||
4d447c9a HZ |
483 | net_device->start_remove = true; |
484 | ||
122a5f64 HZ |
485 | ndev_ctx = netdev_priv(net); |
486 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 487 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 488 | |
df2fff28 | 489 | /* Stop outbound asap */ |
0a282538 | 490 | netif_tx_disable(net); |
df2fff28 GKH |
491 | |
492 | unregister_netdev(net); | |
493 | ||
494 | /* | |
495 | * Call to the vsc driver to let it know that the device is being | |
496 | * removed | |
497 | */ | |
df06bcff | 498 | rndis_filter_device_remove(dev); |
df2fff28 GKH |
499 | |
500 | free_netdev(net); | |
df06bcff | 501 | return 0; |
df2fff28 GKH |
502 | } |
503 | ||
345c4cc3 | 504 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 505 | /* Network guid */ |
8f505944 | 506 | { HV_NIC_GUID, }, |
c45cf2d4 | 507 | { }, |
345c4cc3 S |
508 | }; |
509 | ||
510 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
511 | ||
f1542a66 | 512 | /* The one and only one */ |
fde0ef9b | 513 | static struct hv_driver netvsc_drv = { |
d31b20fc | 514 | .name = KBUILD_MODNAME, |
345c4cc3 | 515 | .id_table = id_table, |
fde0ef9b S |
516 | .probe = netvsc_probe, |
517 | .remove = netvsc_remove, | |
d4890970 | 518 | }; |
f1542a66 | 519 | |
a9869c94 | 520 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 521 | { |
768fa219 | 522 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
523 | } |
524 | ||
1fde28cf | 525 | static int __init netvsc_drv_init(void) |
df2fff28 | 526 | { |
fa85a6c2 HZ |
527 | if (ring_size < RING_SIZE_MIN) { |
528 | ring_size = RING_SIZE_MIN; | |
529 | pr_info("Increased ring_size to %d (min allowed)\n", | |
530 | ring_size); | |
531 | } | |
768fa219 | 532 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
533 | } |
534 | ||
26c14cc1 HJ |
535 | MODULE_LICENSE("GPL"); |
536 | MODULE_VERSION(HV_DRV_VERSION); | |
7880fc54 | 537 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 538 | |
1fde28cf | 539 | module_init(netvsc_drv_init); |
a9869c94 | 540 | module_exit(netvsc_drv_exit); |