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: | |
d0e94d17 | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 19 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 20 | */ |
fceaf24a HJ |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/highmem.h> | |
24 | #include <linux/device.h> | |
fceaf24a | 25 | #include <linux/io.h> |
fceaf24a HJ |
26 | #include <linux/delay.h> |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/inetdevice.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/skbuff.h> | |
31 | #include <linux/in.h> | |
32 | #include <net/arp.h> | |
33 | #include <net/route.h> | |
34 | #include <net/sock.h> | |
35 | #include <net/pkt_sched.h> | |
4983b39a | 36 | #include "osd.h" |
645954c5 | 37 | #include "logging.h" |
870cde80 | 38 | #include "vmbus.h" |
cc211812 | 39 | #include "NetVscApi.h" |
fceaf24a HJ |
40 | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
fceaf24a | 43 | struct net_device_context { |
02fafbc6 GKH |
44 | /* point back to our device context */ |
45 | struct device_context *device_ctx; | |
fceaf24a HJ |
46 | struct net_device_stats stats; |
47 | }; | |
48 | ||
49 | struct netvsc_driver_context { | |
454f18a9 | 50 | /* !! These must be the first 2 fields !! */ |
7e23a6e9 | 51 | /* Which is a bug FIXME! */ |
02fafbc6 | 52 | struct driver_context drv_ctx; |
7e23a6e9 | 53 | struct netvsc_driver drv_obj; |
fceaf24a HJ |
54 | }; |
55 | ||
fceaf24a HJ |
56 | static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; |
57 | ||
454f18a9 | 58 | /* The one and only one */ |
fceaf24a HJ |
59 | static struct netvsc_driver_context g_netvsc_drv; |
60 | ||
fceaf24a HJ |
61 | static struct net_device_stats *netvsc_get_stats(struct net_device *net) |
62 | { | |
63 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
64 | ||
65 | return &net_device_ctx->stats; | |
66 | } | |
67 | ||
4e9bfefa | 68 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a HJ |
69 | { |
70 | } | |
71 | ||
fceaf24a HJ |
72 | static int netvsc_open(struct net_device *net) |
73 | { | |
fceaf24a | 74 | struct net_device_context *net_device_ctx = netdev_priv(net); |
02fafbc6 GKH |
75 | struct driver_context *driver_ctx = |
76 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); | |
77 | struct netvsc_driver_context *net_drv_ctx = | |
78 | (struct netvsc_driver_context *)driver_ctx; | |
7e23a6e9 | 79 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
3d3b5518 | 80 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
02fafbc6 | 81 | int ret = 0; |
fceaf24a HJ |
82 | |
83 | DPRINT_ENTER(NETVSC_DRV); | |
84 | ||
02fafbc6 GKH |
85 | if (netif_carrier_ok(net)) { |
86 | memset(&net_device_ctx->stats, 0, | |
87 | sizeof(struct net_device_stats)); | |
fceaf24a | 88 | |
454f18a9 | 89 | /* Open up the device */ |
fceaf24a | 90 | ret = net_drv_obj->OnOpen(device_obj); |
02fafbc6 GKH |
91 | if (ret != 0) { |
92 | DPRINT_ERR(NETVSC_DRV, | |
93 | "unable to open device (ret %d).", ret); | |
fceaf24a HJ |
94 | return ret; |
95 | } | |
96 | ||
97 | netif_start_queue(net); | |
02fafbc6 | 98 | } else { |
fceaf24a HJ |
99 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
100 | } | |
101 | ||
102 | DPRINT_EXIT(NETVSC_DRV); | |
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); |
02fafbc6 GKH |
109 | struct driver_context *driver_ctx = |
110 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); | |
111 | struct netvsc_driver_context *net_drv_ctx = | |
112 | (struct netvsc_driver_context *)driver_ctx; | |
7e23a6e9 | 113 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
3d3b5518 | 114 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
02fafbc6 | 115 | int ret; |
fceaf24a HJ |
116 | |
117 | DPRINT_ENTER(NETVSC_DRV); | |
118 | ||
119 | netif_stop_queue(net); | |
120 | ||
121 | ret = net_drv_obj->OnClose(device_obj); | |
122 | if (ret != 0) | |
fceaf24a | 123 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
fceaf24a HJ |
124 | |
125 | DPRINT_EXIT(NETVSC_DRV); | |
126 | ||
127 | return ret; | |
128 | } | |
129 | ||
fceaf24a HJ |
130 | static void netvsc_xmit_completion(void *context) |
131 | { | |
4193d4f4 | 132 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 GKH |
133 | struct sk_buff *skb = (struct sk_buff *) |
134 | (unsigned long)packet->Completion.Send.SendCompletionTid; | |
135 | struct net_device *net; | |
fceaf24a HJ |
136 | |
137 | DPRINT_ENTER(NETVSC_DRV); | |
138 | ||
139 | kfree(packet); | |
140 | ||
02fafbc6 | 141 | if (skb) { |
fceaf24a | 142 | net = skb->dev; |
fceaf24a HJ |
143 | dev_kfree_skb_any(skb); |
144 | ||
02fafbc6 GKH |
145 | if (netif_queue_stopped(net)) { |
146 | DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", | |
147 | net); | |
fceaf24a HJ |
148 | |
149 | netif_wake_queue(net); | |
150 | } | |
151 | } | |
152 | ||
153 | DPRINT_EXIT(NETVSC_DRV); | |
154 | } | |
155 | ||
02fafbc6 | 156 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 157 | { |
fceaf24a | 158 | struct net_device_context *net_device_ctx = netdev_priv(net); |
02fafbc6 GKH |
159 | struct driver_context *driver_ctx = |
160 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); | |
161 | struct netvsc_driver_context *net_drv_ctx = | |
162 | (struct netvsc_driver_context *)driver_ctx; | |
7e23a6e9 | 163 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
4193d4f4 | 164 | struct hv_netvsc_packet *packet; |
02fafbc6 GKH |
165 | int i; |
166 | int ret; | |
fceaf24a | 167 | int num_frags; |
02fafbc6 | 168 | int retries = 0; |
fceaf24a HJ |
169 | |
170 | DPRINT_ENTER(NETVSC_DRV); | |
171 | ||
454f18a9 | 172 | /* Support only 1 chain of frags */ |
fceaf24a HJ |
173 | ASSERT(skb_shinfo(skb)->frag_list == NULL); |
174 | ASSERT(skb->dev == net); | |
175 | ||
02fafbc6 GKH |
176 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", |
177 | skb->len, skb->data_len); | |
fceaf24a | 178 | |
454f18a9 | 179 | /* Add 1 for skb->data and any additional ones requested */ |
02fafbc6 GKH |
180 | num_frags = skb_shinfo(skb)->nr_frags + 1 + |
181 | net_drv_obj->AdditionalRequestPageBufferCount; | |
fceaf24a | 182 | |
454f18a9 | 183 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 GKH |
184 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
185 | (num_frags * sizeof(struct hv_page_buffer)) + | |
186 | net_drv_obj->RequestExtSize, GFP_ATOMIC); | |
187 | if (!packet) { | |
4193d4f4 | 188 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
fceaf24a HJ |
189 | return -1; |
190 | } | |
191 | ||
02fafbc6 GKH |
192 | packet->Extension = (void *)(unsigned long)packet + |
193 | sizeof(struct hv_netvsc_packet) + | |
194 | (num_frags * sizeof(struct hv_page_buffer)); | |
fceaf24a | 195 | |
454f18a9 | 196 | /* Setup the rndis header */ |
fceaf24a HJ |
197 | packet->PageBufferCount = num_frags; |
198 | ||
454f18a9 BP |
199 | /* TODO: Flush all write buffers/ memory fence ??? */ |
200 | /* wmb(); */ | |
fceaf24a | 201 | |
454f18a9 | 202 | /* Initialize it from the skb */ |
fceaf24a HJ |
203 | ASSERT(skb->data); |
204 | packet->TotalDataBufferLength = skb->len; | |
205 | ||
02fafbc6 GKH |
206 | /* |
207 | * Start filling in the page buffers starting at | |
208 | * AdditionalRequestPageBufferCount offset | |
209 | */ | |
210 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; | |
211 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1); | |
212 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; | |
fceaf24a HJ |
213 | |
214 | ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); | |
215 | ||
02fafbc6 GKH |
216 | for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1; |
217 | i < num_frags; i++) { | |
218 | packet->PageBuffers[i].Pfn = | |
219 | page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); | |
220 | packet->PageBuffers[i].Offset = | |
221 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; | |
222 | packet->PageBuffers[i].Length = | |
223 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; | |
fceaf24a HJ |
224 | } |
225 | ||
454f18a9 | 226 | /* Set the completion routine */ |
fceaf24a HJ |
227 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
228 | packet->Completion.Send.SendCompletionContext = packet; | |
c4b0bc94 | 229 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
fceaf24a HJ |
230 | |
231 | retry_send: | |
02fafbc6 GKH |
232 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, |
233 | packet); | |
fceaf24a | 234 | |
02fafbc6 | 235 | if (ret == 0) { |
fceaf24a HJ |
236 | ret = NETDEV_TX_OK; |
237 | net_device_ctx->stats.tx_bytes += skb->len; | |
238 | net_device_ctx->stats.tx_packets++; | |
02fafbc6 | 239 | } else { |
fceaf24a | 240 | retries++; |
02fafbc6 GKH |
241 | if (retries < 4) { |
242 | DPRINT_ERR(NETVSC_DRV, "unable to send..." | |
243 | "retrying %d...", retries); | |
fceaf24a HJ |
244 | udelay(100); |
245 | goto retry_send; | |
246 | } | |
247 | ||
454f18a9 | 248 | /* no more room or we are shutting down */ |
02fafbc6 GKH |
249 | DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..." |
250 | "marking net device (%p) busy", ret, net); | |
fceaf24a HJ |
251 | DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); |
252 | ||
253 | ret = NETDEV_TX_BUSY; | |
254 | net_device_ctx->stats.tx_dropped++; | |
255 | ||
256 | netif_stop_queue(net); | |
257 | ||
02fafbc6 GKH |
258 | /* |
259 | * Null it since the caller will free it instead of the | |
260 | * completion routine | |
261 | */ | |
fceaf24a HJ |
262 | packet->Completion.Send.SendCompletionTid = 0; |
263 | ||
02fafbc6 GKH |
264 | /* |
265 | * Release the resources since we will not get any send | |
266 | * completion | |
267 | */ | |
268 | netvsc_xmit_completion((void *)packet); | |
fceaf24a HJ |
269 | } |
270 | ||
02fafbc6 GKH |
271 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", |
272 | net_device_ctx->stats.tx_packets, | |
273 | net_device_ctx->stats.tx_bytes); | |
fceaf24a HJ |
274 | |
275 | DPRINT_EXIT(NETVSC_DRV); | |
276 | return ret; | |
277 | } | |
278 | ||
02fafbc6 GKH |
279 | /** |
280 | * netvsc_linkstatus_callback - Link up/down notification | |
281 | */ | |
282 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, | |
283 | unsigned int status) | |
fceaf24a | 284 | { |
02fafbc6 GKH |
285 | struct device_context *device_ctx = to_device_context(device_obj); |
286 | struct net_device *net = dev_get_drvdata(&device_ctx->device); | |
fceaf24a HJ |
287 | |
288 | DPRINT_ENTER(NETVSC_DRV); | |
289 | ||
02fafbc6 GKH |
290 | if (!net) { |
291 | DPRINT_ERR(NETVSC_DRV, "got link status but net device " | |
292 | "not initialized yet"); | |
fceaf24a HJ |
293 | return; |
294 | } | |
295 | ||
02fafbc6 | 296 | if (status == 1) { |
fceaf24a HJ |
297 | netif_carrier_on(net); |
298 | netif_wake_queue(net); | |
02fafbc6 | 299 | } else { |
fceaf24a HJ |
300 | netif_carrier_off(net); |
301 | netif_stop_queue(net); | |
302 | } | |
303 | DPRINT_EXIT(NETVSC_DRV); | |
304 | } | |
305 | ||
02fafbc6 GKH |
306 | /** |
307 | * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device. | |
308 | */ | |
309 | static int netvsc_recv_callback(struct hv_device *device_obj, | |
310 | struct hv_netvsc_packet *packet) | |
fceaf24a | 311 | { |
fceaf24a | 312 | struct device_context *device_ctx = to_device_context(device_obj); |
621d7fb7 | 313 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
fceaf24a | 314 | struct net_device_context *net_device_ctx; |
fceaf24a HJ |
315 | struct sk_buff *skb; |
316 | void *data; | |
02fafbc6 GKH |
317 | int ret; |
318 | int i; | |
fceaf24a HJ |
319 | unsigned long flags; |
320 | ||
321 | DPRINT_ENTER(NETVSC_DRV); | |
322 | ||
02fafbc6 GKH |
323 | if (!net) { |
324 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " | |
325 | "not initialized yet"); | |
fceaf24a HJ |
326 | return 0; |
327 | } | |
328 | ||
329 | net_device_ctx = netdev_priv(net); | |
330 | ||
454f18a9 | 331 | /* Allocate a skb - TODO preallocate this */ |
02fafbc6 GKH |
332 | /* Pad 2-bytes to align IP header to 16 bytes */ |
333 | skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); | |
fceaf24a HJ |
334 | ASSERT(skb); |
335 | skb_reserve(skb, 2); | |
336 | skb->dev = net; | |
337 | ||
454f18a9 | 338 | /* for kmap_atomic */ |
fceaf24a HJ |
339 | local_irq_save(flags); |
340 | ||
02fafbc6 GKH |
341 | /* |
342 | * Copy to skb. This copy is needed here since the memory pointed by | |
343 | * hv_netvsc_packet cannot be deallocated | |
344 | */ | |
345 | for (i = 0; i < packet->PageBufferCount; i++) { | |
346 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), | |
347 | KM_IRQ1); | |
348 | data = (void *)(unsigned long)data + | |
349 | packet->PageBuffers[i].Offset; | |
350 | ||
351 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, | |
352 | packet->PageBuffers[i].Length); | |
353 | ||
354 | kunmap_atomic((void *)((unsigned long)data - | |
355 | packet->PageBuffers[i].Offset), KM_IRQ1); | |
fceaf24a HJ |
356 | } |
357 | ||
358 | local_irq_restore(flags); | |
359 | ||
360 | skb->protocol = eth_type_trans(skb, net); | |
361 | ||
362 | skb->ip_summed = CHECKSUM_NONE; | |
363 | ||
02fafbc6 GKH |
364 | /* |
365 | * Pass the skb back up. Network stack will deallocate the skb when it | |
366 | * is done | |
367 | */ | |
fceaf24a HJ |
368 | ret = netif_rx(skb); |
369 | ||
02fafbc6 | 370 | switch (ret) { |
fceaf24a HJ |
371 | case NET_RX_DROP: |
372 | net_device_ctx->stats.rx_dropped++; | |
373 | break; | |
374 | default: | |
375 | net_device_ctx->stats.rx_packets++; | |
376 | net_device_ctx->stats.rx_bytes += skb->len; | |
377 | break; | |
378 | ||
379 | } | |
02fafbc6 GKH |
380 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", |
381 | net_device_ctx->stats.rx_packets, | |
382 | net_device_ctx->stats.rx_bytes); | |
fceaf24a HJ |
383 | |
384 | DPRINT_EXIT(NETVSC_DRV); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
df2fff28 GKH |
389 | static const struct net_device_ops device_ops = { |
390 | .ndo_open = netvsc_open, | |
391 | .ndo_stop = netvsc_close, | |
392 | .ndo_start_xmit = netvsc_start_xmit, | |
393 | .ndo_get_stats = netvsc_get_stats, | |
394 | .ndo_set_multicast_list = netvsc_set_multicast_list, | |
395 | }; | |
396 | ||
397 | static int netvsc_probe(struct device *device) | |
398 | { | |
399 | struct driver_context *driver_ctx = | |
400 | driver_to_driver_context(device->driver); | |
401 | struct netvsc_driver_context *net_drv_ctx = | |
402 | (struct netvsc_driver_context *)driver_ctx; | |
403 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; | |
404 | struct device_context *device_ctx = device_to_device_context(device); | |
405 | struct hv_device *device_obj = &device_ctx->device_obj; | |
406 | struct net_device *net = NULL; | |
407 | struct net_device_context *net_device_ctx; | |
408 | struct netvsc_device_info device_info; | |
409 | int ret; | |
410 | ||
411 | DPRINT_ENTER(NETVSC_DRV); | |
412 | ||
413 | if (!net_drv_obj->Base.OnDeviceAdd) | |
414 | return -1; | |
415 | ||
416 | net = alloc_netdev(sizeof(struct net_device_context), "seth%d", | |
417 | ether_setup); | |
418 | if (!net) | |
419 | return -1; | |
420 | ||
421 | /* Set initial state */ | |
422 | netif_carrier_off(net); | |
423 | netif_stop_queue(net); | |
424 | ||
425 | net_device_ctx = netdev_priv(net); | |
426 | net_device_ctx->device_ctx = device_ctx; | |
427 | dev_set_drvdata(device, net); | |
428 | ||
429 | /* Notify the netvsc driver of the new device */ | |
430 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); | |
431 | if (ret != 0) { | |
432 | free_netdev(net); | |
433 | dev_set_drvdata(device, NULL); | |
434 | ||
435 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", | |
436 | ret); | |
437 | return ret; | |
438 | } | |
439 | ||
440 | /* | |
441 | * If carrier is still off ie we did not get a link status callback, | |
442 | * update it if necessary | |
443 | */ | |
444 | /* | |
445 | * FIXME: We should use a atomic or test/set instead to avoid getting | |
446 | * out of sync with the device's link status | |
447 | */ | |
448 | if (!netif_carrier_ok(net)) | |
449 | if (!device_info.LinkState) | |
450 | netif_carrier_on(net); | |
451 | ||
452 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); | |
453 | ||
454 | net->netdev_ops = &device_ops; | |
455 | ||
456 | SET_NETDEV_DEV(net, device); | |
457 | ||
458 | ret = register_netdev(net); | |
459 | if (ret != 0) { | |
460 | /* Remove the device and release the resource */ | |
461 | net_drv_obj->Base.OnDeviceRemove(device_obj); | |
462 | free_netdev(net); | |
463 | } | |
464 | ||
465 | DPRINT_EXIT(NETVSC_DRV); | |
466 | return ret; | |
467 | } | |
468 | ||
469 | static int netvsc_remove(struct device *device) | |
470 | { | |
471 | struct driver_context *driver_ctx = | |
472 | driver_to_driver_context(device->driver); | |
473 | struct netvsc_driver_context *net_drv_ctx = | |
474 | (struct netvsc_driver_context *)driver_ctx; | |
475 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; | |
476 | struct device_context *device_ctx = device_to_device_context(device); | |
477 | struct net_device *net = dev_get_drvdata(&device_ctx->device); | |
478 | struct hv_device *device_obj = &device_ctx->device_obj; | |
479 | int ret; | |
480 | ||
481 | DPRINT_ENTER(NETVSC_DRV); | |
482 | ||
483 | if (net == NULL) { | |
484 | DPRINT_INFO(NETVSC, "no net device to remove"); | |
485 | DPRINT_EXIT(NETVSC_DRV); | |
486 | return 0; | |
487 | } | |
488 | ||
489 | if (!net_drv_obj->Base.OnDeviceRemove) { | |
490 | DPRINT_EXIT(NETVSC_DRV); | |
491 | return -1; | |
492 | } | |
493 | ||
494 | /* Stop outbound asap */ | |
495 | netif_stop_queue(net); | |
496 | /* netif_carrier_off(net); */ | |
497 | ||
498 | unregister_netdev(net); | |
499 | ||
500 | /* | |
501 | * Call to the vsc driver to let it know that the device is being | |
502 | * removed | |
503 | */ | |
504 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); | |
505 | if (ret != 0) { | |
506 | /* TODO: */ | |
507 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); | |
508 | } | |
509 | ||
510 | free_netdev(net); | |
511 | DPRINT_EXIT(NETVSC_DRV); | |
512 | return ret; | |
513 | } | |
514 | ||
fceaf24a HJ |
515 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
516 | { | |
517 | struct device **curr = (struct device **)data; | |
02fafbc6 | 518 | |
fceaf24a | 519 | *curr = dev; |
02fafbc6 GKH |
520 | /* stop iterating */ |
521 | return 1; | |
fceaf24a HJ |
522 | } |
523 | ||
bd1de709 | 524 | static void netvsc_drv_exit(void) |
fceaf24a | 525 | { |
02fafbc6 GKH |
526 | struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; |
527 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; | |
528 | struct device *current_dev; | |
2295ba2e | 529 | int ret; |
fceaf24a HJ |
530 | |
531 | DPRINT_ENTER(NETVSC_DRV); | |
532 | ||
02fafbc6 | 533 | while (1) { |
fceaf24a HJ |
534 | current_dev = NULL; |
535 | ||
454f18a9 | 536 | /* Get the device */ |
2295ba2e | 537 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
02fafbc6 | 538 | ¤t_dev, netvsc_drv_exit_cb); |
2295ba2e BP |
539 | if (ret) |
540 | DPRINT_WARN(NETVSC_DRV, | |
541 | "driver_for_each_device returned %d", ret); | |
542 | ||
fceaf24a HJ |
543 | if (current_dev == NULL) |
544 | break; | |
545 | ||
454f18a9 | 546 | /* Initiate removal from the top-down */ |
02fafbc6 GKH |
547 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", |
548 | current_dev); | |
fceaf24a HJ |
549 | |
550 | device_unregister(current_dev); | |
551 | } | |
552 | ||
553 | if (netvsc_drv_obj->Base.OnCleanup) | |
554 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); | |
555 | ||
556 | vmbus_child_driver_unregister(drv_ctx); | |
557 | ||
558 | DPRINT_EXIT(NETVSC_DRV); | |
559 | ||
560 | return; | |
561 | } | |
562 | ||
21707bed | 563 | static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv)) |
df2fff28 GKH |
564 | { |
565 | struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; | |
566 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; | |
567 | int ret; | |
568 | ||
569 | DPRINT_ENTER(NETVSC_DRV); | |
570 | ||
571 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); | |
572 | ||
573 | net_drv_obj->RingBufferSize = netvsc_ringbuffer_size; | |
574 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; | |
575 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; | |
576 | ||
577 | /* Callback to client driver to complete the initialization */ | |
21707bed | 578 | drv_init(&net_drv_obj->Base); |
df2fff28 GKH |
579 | |
580 | drv_ctx->driver.name = net_drv_obj->Base.name; | |
581 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, | |
582 | sizeof(struct hv_guid)); | |
583 | ||
584 | drv_ctx->probe = netvsc_probe; | |
585 | drv_ctx->remove = netvsc_remove; | |
586 | ||
587 | /* The driver belongs to vmbus */ | |
588 | ret = vmbus_child_driver_register(drv_ctx); | |
589 | ||
590 | DPRINT_EXIT(NETVSC_DRV); | |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
fceaf24a HJ |
595 | static int __init netvsc_init(void) |
596 | { | |
597 | int ret; | |
598 | ||
599 | DPRINT_ENTER(NETVSC_DRV); | |
600 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); | |
601 | ||
602 | ret = netvsc_drv_init(NetVscInitialize); | |
603 | ||
604 | DPRINT_EXIT(NETVSC_DRV); | |
605 | ||
606 | return ret; | |
607 | } | |
608 | ||
609 | static void __exit netvsc_exit(void) | |
610 | { | |
611 | DPRINT_ENTER(NETVSC_DRV); | |
fceaf24a | 612 | netvsc_drv_exit(); |
fceaf24a HJ |
613 | DPRINT_EXIT(NETVSC_DRV); |
614 | } | |
615 | ||
616 | module_param(netvsc_ringbuffer_size, int, S_IRUGO); | |
617 | ||
618 | module_init(netvsc_init); | |
619 | module_exit(netvsc_exit); |