Commit | Line | Data |
---|---|---|
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: | |
18 | * Hank Janssen <hjanssen@microsoft.com> | |
fceaf24a | 19 | */ |
fceaf24a HJ |
20 | #include <linux/init.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/highmem.h> | |
23 | #include <linux/device.h> | |
fceaf24a | 24 | #include <linux/io.h> |
fceaf24a HJ |
25 | #include <linux/delay.h> |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/inetdevice.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/skbuff.h> | |
30 | #include <linux/in.h> | |
31 | #include <net/arp.h> | |
32 | #include <net/route.h> | |
33 | #include <net/sock.h> | |
34 | #include <net/pkt_sched.h> | |
4983b39a | 35 | #include "osd.h" |
645954c5 | 36 | #include "logging.h" |
870cde80 | 37 | #include "vmbus.h" |
cc211812 | 38 | #include "NetVscApi.h" |
fceaf24a HJ |
39 | |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
fceaf24a | 42 | struct net_device_context { |
02fafbc6 GKH |
43 | /* point back to our device context */ |
44 | struct device_context *device_ctx; | |
fceaf24a HJ |
45 | struct net_device_stats stats; |
46 | }; | |
47 | ||
48 | struct netvsc_driver_context { | |
454f18a9 | 49 | /* !! These must be the first 2 fields !! */ |
7e23a6e9 | 50 | /* Which is a bug FIXME! */ |
02fafbc6 | 51 | struct driver_context drv_ctx; |
7e23a6e9 | 52 | struct netvsc_driver drv_obj; |
fceaf24a HJ |
53 | }; |
54 | ||
fceaf24a HJ |
55 | static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; |
56 | ||
454f18a9 | 57 | /* The one and only one */ |
fceaf24a HJ |
58 | static struct netvsc_driver_context g_netvsc_drv; |
59 | ||
fceaf24a HJ |
60 | static struct net_device_stats *netvsc_get_stats(struct net_device *net) |
61 | { | |
62 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
63 | ||
64 | return &net_device_ctx->stats; | |
65 | } | |
66 | ||
4e9bfefa | 67 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a HJ |
68 | { |
69 | } | |
70 | ||
fceaf24a HJ |
71 | static int netvsc_open(struct net_device *net) |
72 | { | |
fceaf24a | 73 | struct net_device_context *net_device_ctx = netdev_priv(net); |
02fafbc6 GKH |
74 | struct driver_context *driver_ctx = |
75 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); | |
76 | struct netvsc_driver_context *net_drv_ctx = | |
77 | (struct netvsc_driver_context *)driver_ctx; | |
7e23a6e9 | 78 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
3d3b5518 | 79 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
02fafbc6 | 80 | int ret = 0; |
fceaf24a HJ |
81 | |
82 | DPRINT_ENTER(NETVSC_DRV); | |
83 | ||
02fafbc6 GKH |
84 | if (netif_carrier_ok(net)) { |
85 | memset(&net_device_ctx->stats, 0, | |
86 | sizeof(struct net_device_stats)); | |
fceaf24a | 87 | |
454f18a9 | 88 | /* Open up the device */ |
fceaf24a | 89 | ret = net_drv_obj->OnOpen(device_obj); |
02fafbc6 GKH |
90 | if (ret != 0) { |
91 | DPRINT_ERR(NETVSC_DRV, | |
92 | "unable to open device (ret %d).", ret); | |
fceaf24a HJ |
93 | return ret; |
94 | } | |
95 | ||
96 | netif_start_queue(net); | |
02fafbc6 | 97 | } else { |
fceaf24a HJ |
98 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
99 | } | |
100 | ||
101 | DPRINT_EXIT(NETVSC_DRV); | |
102 | return ret; | |
103 | } | |
104 | ||
fceaf24a HJ |
105 | static int netvsc_close(struct net_device *net) |
106 | { | |
fceaf24a | 107 | struct net_device_context *net_device_ctx = netdev_priv(net); |
02fafbc6 GKH |
108 | struct driver_context *driver_ctx = |
109 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); | |
110 | struct netvsc_driver_context *net_drv_ctx = | |
111 | (struct netvsc_driver_context *)driver_ctx; | |
7e23a6e9 | 112 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
3d3b5518 | 113 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
02fafbc6 | 114 | int ret; |
fceaf24a HJ |
115 | |
116 | DPRINT_ENTER(NETVSC_DRV); | |
117 | ||
118 | netif_stop_queue(net); | |
119 | ||
120 | ret = net_drv_obj->OnClose(device_obj); | |
121 | if (ret != 0) | |
fceaf24a | 122 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
fceaf24a HJ |
123 | |
124 | DPRINT_EXIT(NETVSC_DRV); | |
125 | ||
126 | return ret; | |
127 | } | |
128 | ||
fceaf24a HJ |
129 | static void netvsc_xmit_completion(void *context) |
130 | { | |
4193d4f4 | 131 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 GKH |
132 | struct sk_buff *skb = (struct sk_buff *) |
133 | (unsigned long)packet->Completion.Send.SendCompletionTid; | |
134 | struct net_device *net; | |
fceaf24a HJ |
135 | |
136 | DPRINT_ENTER(NETVSC_DRV); | |
137 | ||
138 | kfree(packet); | |
139 | ||
02fafbc6 | 140 | if (skb) { |
fceaf24a | 141 | net = skb->dev; |
fceaf24a HJ |
142 | dev_kfree_skb_any(skb); |
143 | ||
02fafbc6 GKH |
144 | if (netif_queue_stopped(net)) { |
145 | DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", | |
146 | net); | |
fceaf24a HJ |
147 | |
148 | netif_wake_queue(net); | |
149 | } | |
150 | } | |
151 | ||
152 | DPRINT_EXIT(NETVSC_DRV); | |
153 | } | |
154 | ||
02fafbc6 | 155 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 156 | { |
fceaf24a | 157 | struct net_device_context *net_device_ctx = netdev_priv(net); |
02fafbc6 GKH |
158 | struct driver_context *driver_ctx = |
159 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); | |
160 | struct netvsc_driver_context *net_drv_ctx = | |
161 | (struct netvsc_driver_context *)driver_ctx; | |
7e23a6e9 | 162 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
4193d4f4 | 163 | struct hv_netvsc_packet *packet; |
02fafbc6 GKH |
164 | int i; |
165 | int ret; | |
fceaf24a | 166 | int num_frags; |
02fafbc6 | 167 | int retries = 0; |
fceaf24a HJ |
168 | |
169 | DPRINT_ENTER(NETVSC_DRV); | |
170 | ||
454f18a9 | 171 | /* Support only 1 chain of frags */ |
fceaf24a HJ |
172 | ASSERT(skb_shinfo(skb)->frag_list == NULL); |
173 | ASSERT(skb->dev == net); | |
174 | ||
02fafbc6 GKH |
175 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", |
176 | skb->len, skb->data_len); | |
fceaf24a | 177 | |
454f18a9 | 178 | /* Add 1 for skb->data and any additional ones requested */ |
02fafbc6 GKH |
179 | num_frags = skb_shinfo(skb)->nr_frags + 1 + |
180 | net_drv_obj->AdditionalRequestPageBufferCount; | |
fceaf24a | 181 | |
454f18a9 | 182 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 GKH |
183 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
184 | (num_frags * sizeof(struct hv_page_buffer)) + | |
185 | net_drv_obj->RequestExtSize, GFP_ATOMIC); | |
186 | if (!packet) { | |
4193d4f4 | 187 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
fceaf24a HJ |
188 | return -1; |
189 | } | |
190 | ||
02fafbc6 GKH |
191 | packet->Extension = (void *)(unsigned long)packet + |
192 | sizeof(struct hv_netvsc_packet) + | |
193 | (num_frags * sizeof(struct hv_page_buffer)); | |
fceaf24a | 194 | |
454f18a9 | 195 | /* Setup the rndis header */ |
fceaf24a HJ |
196 | packet->PageBufferCount = num_frags; |
197 | ||
454f18a9 BP |
198 | /* TODO: Flush all write buffers/ memory fence ??? */ |
199 | /* wmb(); */ | |
fceaf24a | 200 | |
454f18a9 | 201 | /* Initialize it from the skb */ |
fceaf24a HJ |
202 | ASSERT(skb->data); |
203 | packet->TotalDataBufferLength = skb->len; | |
204 | ||
02fafbc6 GKH |
205 | /* |
206 | * Start filling in the page buffers starting at | |
207 | * AdditionalRequestPageBufferCount offset | |
208 | */ | |
209 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; | |
210 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1); | |
211 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; | |
fceaf24a HJ |
212 | |
213 | ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); | |
214 | ||
02fafbc6 GKH |
215 | for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1; |
216 | i < num_frags; i++) { | |
217 | packet->PageBuffers[i].Pfn = | |
218 | page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); | |
219 | packet->PageBuffers[i].Offset = | |
220 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; | |
221 | packet->PageBuffers[i].Length = | |
222 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; | |
fceaf24a HJ |
223 | } |
224 | ||
454f18a9 | 225 | /* Set the completion routine */ |
fceaf24a HJ |
226 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
227 | packet->Completion.Send.SendCompletionContext = packet; | |
c4b0bc94 | 228 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
fceaf24a HJ |
229 | |
230 | retry_send: | |
02fafbc6 GKH |
231 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, |
232 | packet); | |
fceaf24a | 233 | |
02fafbc6 | 234 | if (ret == 0) { |
fceaf24a HJ |
235 | ret = NETDEV_TX_OK; |
236 | net_device_ctx->stats.tx_bytes += skb->len; | |
237 | net_device_ctx->stats.tx_packets++; | |
02fafbc6 | 238 | } else { |
fceaf24a | 239 | retries++; |
02fafbc6 GKH |
240 | if (retries < 4) { |
241 | DPRINT_ERR(NETVSC_DRV, "unable to send..." | |
242 | "retrying %d...", retries); | |
fceaf24a HJ |
243 | udelay(100); |
244 | goto retry_send; | |
245 | } | |
246 | ||
454f18a9 | 247 | /* no more room or we are shutting down */ |
02fafbc6 GKH |
248 | DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..." |
249 | "marking net device (%p) busy", ret, net); | |
fceaf24a HJ |
250 | DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); |
251 | ||
252 | ret = NETDEV_TX_BUSY; | |
253 | net_device_ctx->stats.tx_dropped++; | |
254 | ||
255 | netif_stop_queue(net); | |
256 | ||
02fafbc6 GKH |
257 | /* |
258 | * Null it since the caller will free it instead of the | |
259 | * completion routine | |
260 | */ | |
fceaf24a HJ |
261 | packet->Completion.Send.SendCompletionTid = 0; |
262 | ||
02fafbc6 GKH |
263 | /* |
264 | * Release the resources since we will not get any send | |
265 | * completion | |
266 | */ | |
267 | netvsc_xmit_completion((void *)packet); | |
fceaf24a HJ |
268 | } |
269 | ||
02fafbc6 GKH |
270 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", |
271 | net_device_ctx->stats.tx_packets, | |
272 | net_device_ctx->stats.tx_bytes); | |
fceaf24a HJ |
273 | |
274 | DPRINT_EXIT(NETVSC_DRV); | |
275 | return ret; | |
276 | } | |
277 | ||
02fafbc6 GKH |
278 | /** |
279 | * netvsc_linkstatus_callback - Link up/down notification | |
280 | */ | |
281 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, | |
282 | unsigned int status) | |
fceaf24a | 283 | { |
02fafbc6 GKH |
284 | struct device_context *device_ctx = to_device_context(device_obj); |
285 | struct net_device *net = dev_get_drvdata(&device_ctx->device); | |
fceaf24a HJ |
286 | |
287 | DPRINT_ENTER(NETVSC_DRV); | |
288 | ||
02fafbc6 GKH |
289 | if (!net) { |
290 | DPRINT_ERR(NETVSC_DRV, "got link status but net device " | |
291 | "not initialized yet"); | |
fceaf24a HJ |
292 | return; |
293 | } | |
294 | ||
02fafbc6 | 295 | if (status == 1) { |
fceaf24a HJ |
296 | netif_carrier_on(net); |
297 | netif_wake_queue(net); | |
02fafbc6 | 298 | } else { |
fceaf24a HJ |
299 | netif_carrier_off(net); |
300 | netif_stop_queue(net); | |
301 | } | |
302 | DPRINT_EXIT(NETVSC_DRV); | |
303 | } | |
304 | ||
02fafbc6 GKH |
305 | /** |
306 | * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device. | |
307 | */ | |
308 | static int netvsc_recv_callback(struct hv_device *device_obj, | |
309 | struct hv_netvsc_packet *packet) | |
fceaf24a | 310 | { |
fceaf24a | 311 | struct device_context *device_ctx = to_device_context(device_obj); |
621d7fb7 | 312 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
fceaf24a | 313 | struct net_device_context *net_device_ctx; |
fceaf24a HJ |
314 | struct sk_buff *skb; |
315 | void *data; | |
02fafbc6 GKH |
316 | int ret; |
317 | int i; | |
fceaf24a HJ |
318 | unsigned long flags; |
319 | ||
320 | DPRINT_ENTER(NETVSC_DRV); | |
321 | ||
02fafbc6 GKH |
322 | if (!net) { |
323 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " | |
324 | "not initialized yet"); | |
fceaf24a HJ |
325 | return 0; |
326 | } | |
327 | ||
328 | net_device_ctx = netdev_priv(net); | |
329 | ||
454f18a9 | 330 | /* Allocate a skb - TODO preallocate this */ |
02fafbc6 GKH |
331 | /* Pad 2-bytes to align IP header to 16 bytes */ |
332 | skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); | |
fceaf24a HJ |
333 | ASSERT(skb); |
334 | skb_reserve(skb, 2); | |
335 | skb->dev = net; | |
336 | ||
454f18a9 | 337 | /* for kmap_atomic */ |
fceaf24a HJ |
338 | local_irq_save(flags); |
339 | ||
02fafbc6 GKH |
340 | /* |
341 | * Copy to skb. This copy is needed here since the memory pointed by | |
342 | * hv_netvsc_packet cannot be deallocated | |
343 | */ | |
344 | for (i = 0; i < packet->PageBufferCount; i++) { | |
345 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), | |
346 | KM_IRQ1); | |
347 | data = (void *)(unsigned long)data + | |
348 | packet->PageBuffers[i].Offset; | |
349 | ||
350 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, | |
351 | packet->PageBuffers[i].Length); | |
352 | ||
353 | kunmap_atomic((void *)((unsigned long)data - | |
354 | packet->PageBuffers[i].Offset), KM_IRQ1); | |
fceaf24a HJ |
355 | } |
356 | ||
357 | local_irq_restore(flags); | |
358 | ||
359 | skb->protocol = eth_type_trans(skb, net); | |
360 | ||
361 | skb->ip_summed = CHECKSUM_NONE; | |
362 | ||
02fafbc6 GKH |
363 | /* |
364 | * Pass the skb back up. Network stack will deallocate the skb when it | |
365 | * is done | |
366 | */ | |
fceaf24a HJ |
367 | ret = netif_rx(skb); |
368 | ||
02fafbc6 | 369 | switch (ret) { |
fceaf24a HJ |
370 | case NET_RX_DROP: |
371 | net_device_ctx->stats.rx_dropped++; | |
372 | break; | |
373 | default: | |
374 | net_device_ctx->stats.rx_packets++; | |
375 | net_device_ctx->stats.rx_bytes += skb->len; | |
376 | break; | |
377 | ||
378 | } | |
02fafbc6 GKH |
379 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", |
380 | net_device_ctx->stats.rx_packets, | |
381 | net_device_ctx->stats.rx_bytes); | |
fceaf24a HJ |
382 | |
383 | DPRINT_EXIT(NETVSC_DRV); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
df2fff28 GKH |
388 | static const struct net_device_ops device_ops = { |
389 | .ndo_open = netvsc_open, | |
390 | .ndo_stop = netvsc_close, | |
391 | .ndo_start_xmit = netvsc_start_xmit, | |
392 | .ndo_get_stats = netvsc_get_stats, | |
393 | .ndo_set_multicast_list = netvsc_set_multicast_list, | |
394 | }; | |
395 | ||
396 | static int netvsc_probe(struct device *device) | |
397 | { | |
398 | struct driver_context *driver_ctx = | |
399 | driver_to_driver_context(device->driver); | |
400 | struct netvsc_driver_context *net_drv_ctx = | |
401 | (struct netvsc_driver_context *)driver_ctx; | |
402 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; | |
403 | struct device_context *device_ctx = device_to_device_context(device); | |
404 | struct hv_device *device_obj = &device_ctx->device_obj; | |
405 | struct net_device *net = NULL; | |
406 | struct net_device_context *net_device_ctx; | |
407 | struct netvsc_device_info device_info; | |
408 | int ret; | |
409 | ||
410 | DPRINT_ENTER(NETVSC_DRV); | |
411 | ||
412 | if (!net_drv_obj->Base.OnDeviceAdd) | |
413 | return -1; | |
414 | ||
415 | net = alloc_netdev(sizeof(struct net_device_context), "seth%d", | |
416 | ether_setup); | |
417 | if (!net) | |
418 | return -1; | |
419 | ||
420 | /* Set initial state */ | |
421 | netif_carrier_off(net); | |
422 | netif_stop_queue(net); | |
423 | ||
424 | net_device_ctx = netdev_priv(net); | |
425 | net_device_ctx->device_ctx = device_ctx; | |
426 | dev_set_drvdata(device, net); | |
427 | ||
428 | /* Notify the netvsc driver of the new device */ | |
429 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); | |
430 | if (ret != 0) { | |
431 | free_netdev(net); | |
432 | dev_set_drvdata(device, NULL); | |
433 | ||
434 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", | |
435 | ret); | |
436 | return ret; | |
437 | } | |
438 | ||
439 | /* | |
440 | * If carrier is still off ie we did not get a link status callback, | |
441 | * update it if necessary | |
442 | */ | |
443 | /* | |
444 | * FIXME: We should use a atomic or test/set instead to avoid getting | |
445 | * out of sync with the device's link status | |
446 | */ | |
447 | if (!netif_carrier_ok(net)) | |
448 | if (!device_info.LinkState) | |
449 | netif_carrier_on(net); | |
450 | ||
451 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); | |
452 | ||
453 | net->netdev_ops = &device_ops; | |
454 | ||
455 | SET_NETDEV_DEV(net, device); | |
456 | ||
457 | ret = register_netdev(net); | |
458 | if (ret != 0) { | |
459 | /* Remove the device and release the resource */ | |
460 | net_drv_obj->Base.OnDeviceRemove(device_obj); | |
461 | free_netdev(net); | |
462 | } | |
463 | ||
464 | DPRINT_EXIT(NETVSC_DRV); | |
465 | return ret; | |
466 | } | |
467 | ||
468 | static int netvsc_remove(struct device *device) | |
469 | { | |
470 | struct driver_context *driver_ctx = | |
471 | driver_to_driver_context(device->driver); | |
472 | struct netvsc_driver_context *net_drv_ctx = | |
473 | (struct netvsc_driver_context *)driver_ctx; | |
474 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; | |
475 | struct device_context *device_ctx = device_to_device_context(device); | |
476 | struct net_device *net = dev_get_drvdata(&device_ctx->device); | |
477 | struct hv_device *device_obj = &device_ctx->device_obj; | |
478 | int ret; | |
479 | ||
480 | DPRINT_ENTER(NETVSC_DRV); | |
481 | ||
482 | if (net == NULL) { | |
483 | DPRINT_INFO(NETVSC, "no net device to remove"); | |
484 | DPRINT_EXIT(NETVSC_DRV); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | if (!net_drv_obj->Base.OnDeviceRemove) { | |
489 | DPRINT_EXIT(NETVSC_DRV); | |
490 | return -1; | |
491 | } | |
492 | ||
493 | /* Stop outbound asap */ | |
494 | netif_stop_queue(net); | |
495 | /* netif_carrier_off(net); */ | |
496 | ||
497 | unregister_netdev(net); | |
498 | ||
499 | /* | |
500 | * Call to the vsc driver to let it know that the device is being | |
501 | * removed | |
502 | */ | |
503 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); | |
504 | if (ret != 0) { | |
505 | /* TODO: */ | |
506 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); | |
507 | } | |
508 | ||
509 | free_netdev(net); | |
510 | DPRINT_EXIT(NETVSC_DRV); | |
511 | return ret; | |
512 | } | |
513 | ||
fceaf24a HJ |
514 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
515 | { | |
516 | struct device **curr = (struct device **)data; | |
02fafbc6 | 517 | |
fceaf24a | 518 | *curr = dev; |
02fafbc6 GKH |
519 | /* stop iterating */ |
520 | return 1; | |
fceaf24a HJ |
521 | } |
522 | ||
bd1de709 | 523 | static void netvsc_drv_exit(void) |
fceaf24a | 524 | { |
02fafbc6 GKH |
525 | struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; |
526 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; | |
527 | struct device *current_dev; | |
2295ba2e | 528 | int ret; |
fceaf24a HJ |
529 | |
530 | DPRINT_ENTER(NETVSC_DRV); | |
531 | ||
02fafbc6 | 532 | while (1) { |
fceaf24a HJ |
533 | current_dev = NULL; |
534 | ||
454f18a9 | 535 | /* Get the device */ |
2295ba2e | 536 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
02fafbc6 | 537 | ¤t_dev, netvsc_drv_exit_cb); |
2295ba2e BP |
538 | if (ret) |
539 | DPRINT_WARN(NETVSC_DRV, | |
540 | "driver_for_each_device returned %d", ret); | |
541 | ||
fceaf24a HJ |
542 | if (current_dev == NULL) |
543 | break; | |
544 | ||
454f18a9 | 545 | /* Initiate removal from the top-down */ |
02fafbc6 GKH |
546 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", |
547 | current_dev); | |
fceaf24a HJ |
548 | |
549 | device_unregister(current_dev); | |
550 | } | |
551 | ||
552 | if (netvsc_drv_obj->Base.OnCleanup) | |
553 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); | |
554 | ||
555 | vmbus_child_driver_unregister(drv_ctx); | |
556 | ||
557 | DPRINT_EXIT(NETVSC_DRV); | |
558 | ||
559 | return; | |
560 | } | |
561 | ||
df2fff28 GKH |
562 | static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) |
563 | { | |
564 | struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; | |
565 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; | |
566 | int ret; | |
567 | ||
568 | DPRINT_ENTER(NETVSC_DRV); | |
569 | ||
570 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); | |
571 | ||
572 | net_drv_obj->RingBufferSize = netvsc_ringbuffer_size; | |
573 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; | |
574 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; | |
575 | ||
576 | /* Callback to client driver to complete the initialization */ | |
577 | pfn_drv_init(&net_drv_obj->Base); | |
578 | ||
579 | drv_ctx->driver.name = net_drv_obj->Base.name; | |
580 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, | |
581 | sizeof(struct hv_guid)); | |
582 | ||
583 | drv_ctx->probe = netvsc_probe; | |
584 | drv_ctx->remove = netvsc_remove; | |
585 | ||
586 | /* The driver belongs to vmbus */ | |
587 | ret = vmbus_child_driver_register(drv_ctx); | |
588 | ||
589 | DPRINT_EXIT(NETVSC_DRV); | |
590 | ||
591 | return ret; | |
592 | } | |
593 | ||
fceaf24a HJ |
594 | static int __init netvsc_init(void) |
595 | { | |
596 | int ret; | |
597 | ||
598 | DPRINT_ENTER(NETVSC_DRV); | |
599 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); | |
600 | ||
601 | ret = netvsc_drv_init(NetVscInitialize); | |
602 | ||
603 | DPRINT_EXIT(NETVSC_DRV); | |
604 | ||
605 | return ret; | |
606 | } | |
607 | ||
608 | static void __exit netvsc_exit(void) | |
609 | { | |
610 | DPRINT_ENTER(NETVSC_DRV); | |
fceaf24a | 611 | netvsc_drv_exit(); |
fceaf24a HJ |
612 | DPRINT_EXIT(NETVSC_DRV); |
613 | } | |
614 | ||
615 | module_param(netvsc_ringbuffer_size, int, S_IRUGO); | |
616 | ||
617 | module_init(netvsc_init); | |
618 | module_exit(netvsc_exit); |