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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: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
fceaf24a | 20 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
0c3b7b2f S |
22 | #include <linux/sched.h> |
23 | #include <linux/wait.h> | |
45da89e5 | 24 | #include <linux/highmem.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
0120ee0d | 26 | #include <linux/io.h> |
9f8bd8ba | 27 | #include <linux/if_ether.h> |
eb335bc4 | 28 | #include <linux/netdevice.h> |
3f335ea2 S |
29 | |
30 | #include "hyperv.h" | |
5ca7252a | 31 | #include "hyperv_net.h" |
fceaf24a | 32 | |
fceaf24a | 33 | |
e681b954 | 34 | enum rndis_device_state { |
fceaf24a HJ |
35 | RNDIS_DEV_UNINITIALIZED = 0, |
36 | RNDIS_DEV_INITIALIZING, | |
37 | RNDIS_DEV_INITIALIZED, | |
38 | RNDIS_DEV_DATAINITIALIZED, | |
e681b954 | 39 | }; |
fceaf24a | 40 | |
e681b954 | 41 | struct rndis_device { |
c2a4efdd | 42 | struct netvsc_device *net_dev; |
fceaf24a | 43 | |
c2a4efdd HZ |
44 | enum rndis_device_state state; |
45 | u32 link_stat; | |
46 | atomic_t new_req_id; | |
fceaf24a | 47 | |
880fb89c | 48 | spinlock_t request_lock; |
c2a4efdd | 49 | struct list_head req_list; |
fceaf24a | 50 | |
c2a4efdd | 51 | unsigned char hw_mac_adr[ETH_ALEN]; |
e681b954 | 52 | }; |
fceaf24a | 53 | |
e681b954 | 54 | struct rndis_request { |
c2a4efdd | 55 | struct list_head list_ent; |
98d79690 | 56 | struct completion wait_event; |
fceaf24a | 57 | |
0120ee0d GKH |
58 | /* |
59 | * FIXME: We assumed a fixed size response here. If we do ever need to | |
60 | * handle a bigger response, we can either define a max response | |
61 | * message or add a response buffer variable above this field | |
62 | */ | |
c2a4efdd | 63 | struct rndis_message response_msg; |
fceaf24a | 64 | |
454f18a9 | 65 | /* Simplify allocation by having a netvsc packet inline */ |
c2a4efdd HZ |
66 | struct hv_netvsc_packet pkt; |
67 | struct hv_page_buffer buf; | |
454f18a9 | 68 | /* FIXME: We assumed a fixed size request here. */ |
c2a4efdd | 69 | struct rndis_message request_msg; |
e681b954 | 70 | }; |
fceaf24a | 71 | |
9c26aa0d | 72 | static void rndis_filter_send_completion(void *ctx); |
0120ee0d | 73 | |
9c26aa0d | 74 | static void rndis_filter_send_request_completion(void *ctx); |
454f18a9 BP |
75 | |
76 | ||
fceaf24a | 77 | |
9c26aa0d | 78 | static struct rndis_device *get_rndis_device(void) |
fceaf24a | 79 | { |
e681b954 | 80 | struct rndis_device *device; |
fceaf24a | 81 | |
e681b954 | 82 | device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL); |
fceaf24a | 83 | if (!device) |
fceaf24a | 84 | return NULL; |
fceaf24a | 85 | |
880fb89c | 86 | spin_lock_init(&device->request_lock); |
fceaf24a | 87 | |
c2a4efdd | 88 | INIT_LIST_HEAD(&device->req_list); |
fceaf24a | 89 | |
c2a4efdd | 90 | device->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
91 | |
92 | return device; | |
93 | } | |
94 | ||
9c26aa0d | 95 | static struct rndis_request *get_rndis_request(struct rndis_device *dev, |
c2a4efdd HZ |
96 | u32 msg_type, |
97 | u32 msg_len) | |
fceaf24a | 98 | { |
e681b954 | 99 | struct rndis_request *request; |
c2a4efdd | 100 | struct rndis_message *rndis_msg; |
9f33d054 | 101 | struct rndis_set_request *set; |
880fb89c | 102 | unsigned long flags; |
fceaf24a | 103 | |
e681b954 | 104 | request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL); |
fceaf24a | 105 | if (!request) |
fceaf24a | 106 | return NULL; |
fceaf24a | 107 | |
98d79690 | 108 | init_completion(&request->wait_event); |
fceaf24a | 109 | |
c2a4efdd | 110 | rndis_msg = &request->request_msg; |
a388eb17 HZ |
111 | rndis_msg->ndis_msg_type = msg_type; |
112 | rndis_msg->msg_len = msg_len; | |
fceaf24a | 113 | |
0120ee0d GKH |
114 | /* |
115 | * Set the request id. This field is always after the rndis header for | |
116 | * request/response packet types so we just used the SetRequest as a | |
117 | * template | |
118 | */ | |
a388eb17 HZ |
119 | set = &rndis_msg->msg.set_req; |
120 | set->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 121 | |
454f18a9 | 122 | /* Add to the request list */ |
c2a4efdd HZ |
123 | spin_lock_irqsave(&dev->request_lock, flags); |
124 | list_add_tail(&request->list_ent, &dev->req_list); | |
125 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a HJ |
126 | |
127 | return request; | |
128 | } | |
129 | ||
9c26aa0d | 130 | static void put_rndis_request(struct rndis_device *dev, |
c2a4efdd | 131 | struct rndis_request *req) |
fceaf24a | 132 | { |
880fb89c GKH |
133 | unsigned long flags; |
134 | ||
c2a4efdd HZ |
135 | spin_lock_irqsave(&dev->request_lock, flags); |
136 | list_del(&req->list_ent); | |
137 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a | 138 | |
c2a4efdd | 139 | kfree(req); |
fceaf24a HJ |
140 | } |
141 | ||
729a2849 HZ |
142 | static void dump_rndis_message(struct hv_device *hv_dev, |
143 | struct rndis_message *rndis_msg) | |
fceaf24a | 144 | { |
729a2849 HZ |
145 | struct net_device *netdev = dev_get_drvdata(&hv_dev->device); |
146 | ||
a388eb17 | 147 | switch (rndis_msg->ndis_msg_type) { |
fceaf24a | 148 | case REMOTE_NDIS_PACKET_MSG: |
729a2849 | 149 | netdev_dbg(netdev, "REMOTE_NDIS_PACKET_MSG (len %u, " |
0120ee0d GKH |
150 | "data offset %u data len %u, # oob %u, " |
151 | "oob offset %u, oob len %u, pkt offset %u, " | |
729a2849 | 152 | "pkt len %u\n", |
a388eb17 HZ |
153 | rndis_msg->msg_len, |
154 | rndis_msg->msg.pkt.data_offset, | |
155 | rndis_msg->msg.pkt.data_len, | |
156 | rndis_msg->msg.pkt.num_oob_data_elements, | |
157 | rndis_msg->msg.pkt.oob_data_offset, | |
158 | rndis_msg->msg.pkt.oob_data_len, | |
159 | rndis_msg->msg.pkt.per_pkt_info_offset, | |
160 | rndis_msg->msg.pkt.per_pkt_info_len); | |
fceaf24a HJ |
161 | break; |
162 | ||
163 | case REMOTE_NDIS_INITIALIZE_CMPLT: | |
729a2849 | 164 | netdev_dbg(netdev, "REMOTE_NDIS_INITIALIZE_CMPLT " |
0120ee0d GKH |
165 | "(len %u, id 0x%x, status 0x%x, major %d, minor %d, " |
166 | "device flags %d, max xfer size 0x%x, max pkts %u, " | |
729a2849 | 167 | "pkt aligned %u)\n", |
a388eb17 HZ |
168 | rndis_msg->msg_len, |
169 | rndis_msg->msg.init_complete.req_id, | |
170 | rndis_msg->msg.init_complete.status, | |
171 | rndis_msg->msg.init_complete.major_ver, | |
172 | rndis_msg->msg.init_complete.minor_ver, | |
173 | rndis_msg->msg.init_complete.dev_flags, | |
174 | rndis_msg->msg.init_complete.max_xfer_size, | |
175 | rndis_msg->msg.init_complete. | |
176 | max_pkt_per_msg, | |
177 | rndis_msg->msg.init_complete. | |
178 | pkt_alignment_factor); | |
fceaf24a HJ |
179 | break; |
180 | ||
181 | case REMOTE_NDIS_QUERY_CMPLT: | |
729a2849 | 182 | netdev_dbg(netdev, "REMOTE_NDIS_QUERY_CMPLT " |
0120ee0d | 183 | "(len %u, id 0x%x, status 0x%x, buf len %u, " |
729a2849 | 184 | "buf offset %u)\n", |
a388eb17 HZ |
185 | rndis_msg->msg_len, |
186 | rndis_msg->msg.query_complete.req_id, | |
187 | rndis_msg->msg.query_complete.status, | |
188 | rndis_msg->msg.query_complete. | |
189 | info_buflen, | |
190 | rndis_msg->msg.query_complete. | |
191 | info_buf_offset); | |
fceaf24a HJ |
192 | break; |
193 | ||
194 | case REMOTE_NDIS_SET_CMPLT: | |
729a2849 HZ |
195 | netdev_dbg(netdev, |
196 | "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)\n", | |
a388eb17 HZ |
197 | rndis_msg->msg_len, |
198 | rndis_msg->msg.set_complete.req_id, | |
199 | rndis_msg->msg.set_complete.status); | |
fceaf24a HJ |
200 | break; |
201 | ||
202 | case REMOTE_NDIS_INDICATE_STATUS_MSG: | |
729a2849 HZ |
203 | netdev_dbg(netdev, "REMOTE_NDIS_INDICATE_STATUS_MSG " |
204 | "(len %u, status 0x%x, buf len %u, buf offset %u)\n", | |
a388eb17 HZ |
205 | rndis_msg->msg_len, |
206 | rndis_msg->msg.indicate_status.status, | |
207 | rndis_msg->msg.indicate_status.status_buflen, | |
208 | rndis_msg->msg.indicate_status.status_buf_offset); | |
fceaf24a HJ |
209 | break; |
210 | ||
211 | default: | |
729a2849 | 212 | netdev_dbg(netdev, "0x%x (len %u)\n", |
a388eb17 HZ |
213 | rndis_msg->ndis_msg_type, |
214 | rndis_msg->msg_len); | |
fceaf24a HJ |
215 | break; |
216 | } | |
217 | } | |
218 | ||
9c26aa0d | 219 | static int rndis_filter_send_request(struct rndis_device *dev, |
c2a4efdd | 220 | struct rndis_request *req) |
fceaf24a | 221 | { |
0120ee0d | 222 | int ret; |
4193d4f4 | 223 | struct hv_netvsc_packet *packet; |
fceaf24a | 224 | |
454f18a9 | 225 | /* Setup the packet to send it */ |
c2a4efdd | 226 | packet = &req->pkt; |
fceaf24a | 227 | |
72a2f5bd | 228 | packet->is_data_pkt = false; |
a388eb17 | 229 | packet->total_data_buflen = req->request_msg.msg_len; |
72a2f5bd | 230 | packet->page_buf_cnt = 1; |
fceaf24a | 231 | |
ca623ad3 | 232 | packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >> |
0120ee0d | 233 | PAGE_SHIFT; |
ca623ad3 HZ |
234 | packet->page_buf[0].len = req->request_msg.msg_len; |
235 | packet->page_buf[0].offset = | |
c2a4efdd | 236 | (unsigned long)&req->request_msg & (PAGE_SIZE - 1); |
fceaf24a | 237 | |
72a2f5bd HZ |
238 | packet->completion.send.send_completion_ctx = req;/* packet; */ |
239 | packet->completion.send.send_completion = | |
9c26aa0d | 240 | rndis_filter_send_request_completion; |
72a2f5bd | 241 | packet->completion.send.send_completion_tid = (unsigned long)dev; |
fceaf24a | 242 | |
0ec6ff40 | 243 | ret = netvsc_send(dev->net_dev->dev, packet); |
fceaf24a HJ |
244 | return ret; |
245 | } | |
246 | ||
9c26aa0d | 247 | static void rndis_filter_receive_response(struct rndis_device *dev, |
c2a4efdd | 248 | struct rndis_message *resp) |
fceaf24a | 249 | { |
e681b954 | 250 | struct rndis_request *request = NULL; |
0e727613 | 251 | bool found = false; |
880fb89c | 252 | unsigned long flags; |
fceaf24a | 253 | |
c2a4efdd HZ |
254 | spin_lock_irqsave(&dev->request_lock, flags); |
255 | list_for_each_entry(request, &dev->req_list, list_ent) { | |
0120ee0d GKH |
256 | /* |
257 | * All request/response message contains RequestId as the 1st | |
258 | * field | |
259 | */ | |
a388eb17 HZ |
260 | if (request->request_msg.msg.init_req.req_id |
261 | == resp->msg.init_complete.req_id) { | |
0e727613 | 262 | found = true; |
fceaf24a HJ |
263 | break; |
264 | } | |
265 | } | |
c2a4efdd | 266 | spin_unlock_irqrestore(&dev->request_lock, flags); |
fceaf24a | 267 | |
0120ee0d | 268 | if (found) { |
a388eb17 | 269 | if (resp->msg_len <= sizeof(struct rndis_message)) { |
c2a4efdd | 270 | memcpy(&request->response_msg, resp, |
a388eb17 | 271 | resp->msg_len); |
0120ee0d | 272 | } else { |
eb335bc4 HJ |
273 | dev_err(&dev->net_dev->dev->device, |
274 | "rndis response buffer overflow " | |
275 | "detected (size %u max %zu)\n", | |
276 | resp->msg_len, | |
277 | sizeof(struct rndis_filter_packet)); | |
0120ee0d | 278 | |
a388eb17 | 279 | if (resp->ndis_msg_type == |
0120ee0d GKH |
280 | REMOTE_NDIS_RESET_CMPLT) { |
281 | /* does not have a request id field */ | |
a388eb17 HZ |
282 | request->response_msg.msg.reset_complete. |
283 | status = STATUS_BUFFER_OVERFLOW; | |
0120ee0d | 284 | } else { |
a388eb17 HZ |
285 | request->response_msg.msg. |
286 | init_complete.status = | |
c2a4efdd | 287 | STATUS_BUFFER_OVERFLOW; |
fceaf24a HJ |
288 | } |
289 | } | |
290 | ||
98d79690 | 291 | complete(&request->wait_event); |
0120ee0d | 292 | } else { |
eb335bc4 HJ |
293 | dev_err(&dev->net_dev->dev->device, |
294 | "no rndis request found for this response " | |
295 | "(id 0x%x res type 0x%x)\n", | |
296 | resp->msg.init_complete.req_id, | |
297 | resp->ndis_msg_type); | |
fceaf24a | 298 | } |
fceaf24a HJ |
299 | } |
300 | ||
9c26aa0d | 301 | static void rndis_filter_receive_indicate_status(struct rndis_device *dev, |
c2a4efdd | 302 | struct rndis_message *resp) |
fceaf24a | 303 | { |
0120ee0d | 304 | struct rndis_indicate_status *indicate = |
a388eb17 | 305 | &resp->msg.indicate_status; |
fceaf24a | 306 | |
a388eb17 | 307 | if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) { |
39fb6aab | 308 | netvsc_linkstatus_callback( |
53d21fdb | 309 | dev->net_dev->dev, 1); |
a388eb17 | 310 | } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) { |
39fb6aab | 311 | netvsc_linkstatus_callback( |
53d21fdb | 312 | dev->net_dev->dev, 0); |
0120ee0d GKH |
313 | } else { |
314 | /* | |
315 | * TODO: | |
316 | */ | |
fceaf24a HJ |
317 | } |
318 | } | |
319 | ||
9c26aa0d | 320 | static void rndis_filter_receive_data(struct rndis_device *dev, |
c2a4efdd HZ |
321 | struct rndis_message *msg, |
322 | struct hv_netvsc_packet *pkt) | |
fceaf24a | 323 | { |
c2a4efdd HZ |
324 | struct rndis_packet *rndis_pkt; |
325 | u32 data_offset; | |
fceaf24a | 326 | |
a388eb17 | 327 | rndis_pkt = &msg->msg.pkt; |
fceaf24a | 328 | |
0120ee0d GKH |
329 | /* |
330 | * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this | |
331 | * netvsc packet (ie TotalDataBufferLength != MessageLength) | |
332 | */ | |
fceaf24a | 333 | |
454f18a9 | 334 | /* Remove the rndis header and pass it back up the stack */ |
a388eb17 | 335 | data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset; |
fceaf24a | 336 | |
72a2f5bd | 337 | pkt->total_data_buflen -= data_offset; |
ca623ad3 HZ |
338 | pkt->page_buf[0].offset += data_offset; |
339 | pkt->page_buf[0].len -= data_offset; | |
fceaf24a | 340 | |
72a2f5bd | 341 | pkt->is_data_pkt = true; |
fceaf24a | 342 | |
a25e1dbe | 343 | netvsc_recv_callback(dev->net_dev->dev, pkt); |
fceaf24a HJ |
344 | } |
345 | ||
5fcc4115 | 346 | int rndis_filter_receive(struct hv_device *dev, |
c2a4efdd | 347 | struct hv_netvsc_packet *pkt) |
fceaf24a | 348 | { |
ca623ad3 | 349 | struct netvsc_device *net_dev = dev->ext; |
c2a4efdd HZ |
350 | struct rndis_device *rndis_dev; |
351 | struct rndis_message rndis_msg; | |
352 | struct rndis_message *rndis_hdr; | |
fceaf24a | 353 | |
c2a4efdd | 354 | if (!net_dev) |
8a62d716 BP |
355 | return -EINVAL; |
356 | ||
454f18a9 | 357 | /* Make sure the rndis device state is initialized */ |
53d21fdb | 358 | if (!net_dev->extension) { |
eb335bc4 HJ |
359 | dev_err(&dev->device, "got rndis message but no rndis device - " |
360 | "dropping this message!\n"); | |
62c0743e | 361 | return -ENODEV; |
fceaf24a HJ |
362 | } |
363 | ||
53d21fdb | 364 | rndis_dev = (struct rndis_device *)net_dev->extension; |
c2a4efdd | 365 | if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) { |
eb335bc4 HJ |
366 | dev_err(&dev->device, "got rndis message but rndis device " |
367 | "uninitialized...dropping this message!\n"); | |
62c0743e | 368 | return -ENODEV; |
fceaf24a HJ |
369 | } |
370 | ||
c2a4efdd | 371 | rndis_hdr = (struct rndis_message *)kmap_atomic( |
ca623ad3 | 372 | pfn_to_page(pkt->page_buf[0].pfn), KM_IRQ0); |
fceaf24a | 373 | |
c2a4efdd | 374 | rndis_hdr = (void *)((unsigned long)rndis_hdr + |
ca623ad3 | 375 | pkt->page_buf[0].offset); |
fceaf24a | 376 | |
454f18a9 | 377 | /* Make sure we got a valid rndis message */ |
a388eb17 HZ |
378 | if ((rndis_hdr->ndis_msg_type != REMOTE_NDIS_PACKET_MSG) && |
379 | (rndis_hdr->msg_len > sizeof(struct rndis_message))) { | |
eb335bc4 HJ |
380 | dev_err(&dev->device, "incoming rndis message buffer overflow " |
381 | "detected (got %u, max %zu)..marking it an error!\n", | |
a388eb17 | 382 | rndis_hdr->msg_len, |
0120ee0d | 383 | sizeof(struct rndis_message)); |
fceaf24a HJ |
384 | } |
385 | ||
c2a4efdd | 386 | memcpy(&rndis_msg, rndis_hdr, |
a388eb17 | 387 | (rndis_hdr->msg_len > sizeof(struct rndis_message)) ? |
0120ee0d | 388 | sizeof(struct rndis_message) : |
a388eb17 | 389 | rndis_hdr->msg_len); |
fceaf24a | 390 | |
ca623ad3 | 391 | kunmap_atomic(rndis_hdr - pkt->page_buf[0].offset, KM_IRQ0); |
fceaf24a | 392 | |
729a2849 | 393 | dump_rndis_message(dev, &rndis_msg); |
fceaf24a | 394 | |
a388eb17 | 395 | switch (rndis_msg.ndis_msg_type) { |
fceaf24a | 396 | case REMOTE_NDIS_PACKET_MSG: |
0120ee0d | 397 | /* data msg */ |
9c26aa0d | 398 | rndis_filter_receive_data(rndis_dev, &rndis_msg, pkt); |
fceaf24a HJ |
399 | break; |
400 | ||
fceaf24a HJ |
401 | case REMOTE_NDIS_INITIALIZE_CMPLT: |
402 | case REMOTE_NDIS_QUERY_CMPLT: | |
403 | case REMOTE_NDIS_SET_CMPLT: | |
0120ee0d | 404 | /* completion msgs */ |
9c26aa0d | 405 | rndis_filter_receive_response(rndis_dev, &rndis_msg); |
fceaf24a HJ |
406 | break; |
407 | ||
fceaf24a | 408 | case REMOTE_NDIS_INDICATE_STATUS_MSG: |
0120ee0d | 409 | /* notification msgs */ |
9c26aa0d | 410 | rndis_filter_receive_indicate_status(rndis_dev, &rndis_msg); |
fceaf24a HJ |
411 | break; |
412 | default: | |
eb335bc4 HJ |
413 | dev_err(&dev->device, |
414 | "unhandled rndis message (type %u len %u)\n", | |
a388eb17 HZ |
415 | rndis_msg.ndis_msg_type, |
416 | rndis_msg.msg_len); | |
fceaf24a HJ |
417 | break; |
418 | } | |
419 | ||
fceaf24a HJ |
420 | return 0; |
421 | } | |
422 | ||
9c26aa0d | 423 | static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, |
c2a4efdd | 424 | void *result, u32 *result_size) |
fceaf24a | 425 | { |
e681b954 | 426 | struct rndis_request *request; |
c2a4efdd | 427 | u32 inresult_size = *result_size; |
9f33d054 | 428 | struct rndis_query_request *query; |
c2a4efdd | 429 | struct rndis_query_complete *query_complete; |
0120ee0d | 430 | int ret = 0; |
98d79690 | 431 | int t; |
fceaf24a | 432 | |
c2a4efdd | 433 | if (!result) |
8a62d716 | 434 | return -EINVAL; |
fceaf24a | 435 | |
c2a4efdd | 436 | *result_size = 0; |
9c26aa0d | 437 | request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG, |
0120ee0d GKH |
438 | RNDIS_MESSAGE_SIZE(struct rndis_query_request)); |
439 | if (!request) { | |
de6e0580 | 440 | ret = -ENOMEM; |
fceaf24a HJ |
441 | goto Cleanup; |
442 | } | |
443 | ||
454f18a9 | 444 | /* Setup the rndis query */ |
a388eb17 HZ |
445 | query = &request->request_msg.msg.query_req; |
446 | query->oid = oid; | |
447 | query->info_buf_offset = sizeof(struct rndis_query_request); | |
448 | query->info_buflen = 0; | |
449 | query->dev_vc_handle = 0; | |
fceaf24a | 450 | |
9c26aa0d | 451 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 452 | if (ret != 0) |
fceaf24a | 453 | goto Cleanup; |
fceaf24a | 454 | |
5c5781b3 | 455 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 | 456 | if (t == 0) { |
0c3b7b2f S |
457 | ret = -ETIMEDOUT; |
458 | goto Cleanup; | |
459 | } | |
fceaf24a | 460 | |
454f18a9 | 461 | /* Copy the response back */ |
a388eb17 | 462 | query_complete = &request->response_msg.msg.query_complete; |
fceaf24a | 463 | |
a388eb17 | 464 | if (query_complete->info_buflen > inresult_size) { |
fceaf24a HJ |
465 | ret = -1; |
466 | goto Cleanup; | |
467 | } | |
468 | ||
c2a4efdd HZ |
469 | memcpy(result, |
470 | (void *)((unsigned long)query_complete + | |
a388eb17 HZ |
471 | query_complete->info_buf_offset), |
472 | query_complete->info_buflen); | |
fceaf24a | 473 | |
a388eb17 | 474 | *result_size = query_complete->info_buflen; |
fceaf24a HJ |
475 | |
476 | Cleanup: | |
477 | if (request) | |
9c26aa0d | 478 | put_rndis_request(dev, request); |
fceaf24a HJ |
479 | |
480 | return ret; | |
481 | } | |
482 | ||
9c26aa0d | 483 | static int rndis_filter_query_device_mac(struct rndis_device *dev) |
fceaf24a | 484 | { |
9f8bd8ba | 485 | u32 size = ETH_ALEN; |
fceaf24a | 486 | |
9c26aa0d | 487 | return rndis_filter_query_device(dev, |
0120ee0d | 488 | RNDIS_OID_802_3_PERMANENT_ADDRESS, |
c2a4efdd | 489 | dev->hw_mac_adr, &size); |
fceaf24a HJ |
490 | } |
491 | ||
9c26aa0d | 492 | static int rndis_filter_query_device_link_status(struct rndis_device *dev) |
fceaf24a | 493 | { |
0120ee0d | 494 | u32 size = sizeof(u32); |
fceaf24a | 495 | |
9c26aa0d | 496 | return rndis_filter_query_device(dev, |
0120ee0d | 497 | RNDIS_OID_GEN_MEDIA_CONNECT_STATUS, |
c2a4efdd | 498 | &dev->link_stat, &size); |
fceaf24a HJ |
499 | } |
500 | ||
9c26aa0d | 501 | static int rndis_filter_set_packet_filter(struct rndis_device *dev, |
c2a4efdd | 502 | u32 new_filter) |
fceaf24a | 503 | { |
e681b954 | 504 | struct rndis_request *request; |
9f33d054 | 505 | struct rndis_set_request *set; |
c2a4efdd | 506 | struct rndis_set_complete *set_complete; |
4d643114 | 507 | u32 status; |
98d79690 | 508 | int ret, t; |
fceaf24a | 509 | |
9c26aa0d | 510 | request = get_rndis_request(dev, REMOTE_NDIS_SET_MSG, |
0120ee0d GKH |
511 | RNDIS_MESSAGE_SIZE(struct rndis_set_request) + |
512 | sizeof(u32)); | |
513 | if (!request) { | |
58ef3977 | 514 | ret = -ENOMEM; |
fceaf24a HJ |
515 | goto Cleanup; |
516 | } | |
517 | ||
454f18a9 | 518 | /* Setup the rndis set */ |
a388eb17 HZ |
519 | set = &request->request_msg.msg.set_req; |
520 | set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER; | |
521 | set->info_buflen = sizeof(u32); | |
522 | set->info_buf_offset = sizeof(struct rndis_set_request); | |
fceaf24a | 523 | |
0120ee0d | 524 | memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request), |
c2a4efdd | 525 | &new_filter, sizeof(u32)); |
fceaf24a | 526 | |
9c26aa0d | 527 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 528 | if (ret != 0) |
fceaf24a | 529 | goto Cleanup; |
fceaf24a | 530 | |
5c5781b3 | 531 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 S |
532 | |
533 | if (t == 0) { | |
eb335bc4 HJ |
534 | dev_err(&dev->net_dev->dev->device, |
535 | "timeout before we got a set response...\n"); | |
0120ee0d | 536 | /* |
25985edc | 537 | * We can't deallocate the request since we may still receive a |
0120ee0d GKH |
538 | * send completion for it. |
539 | */ | |
fceaf24a | 540 | goto Exit; |
0120ee0d | 541 | } else { |
a388eb17 HZ |
542 | set_complete = &request->response_msg.msg.set_complete; |
543 | status = set_complete->status; | |
fceaf24a HJ |
544 | } |
545 | ||
546 | Cleanup: | |
547 | if (request) | |
9c26aa0d | 548 | put_rndis_request(dev, request); |
fceaf24a | 549 | Exit: |
fceaf24a HJ |
550 | return ret; |
551 | } | |
552 | ||
fceaf24a | 553 | |
9c26aa0d | 554 | static int rndis_filter_init_device(struct rndis_device *dev) |
fceaf24a | 555 | { |
e681b954 | 556 | struct rndis_request *request; |
9f33d054 | 557 | struct rndis_initialize_request *init; |
c2a4efdd | 558 | struct rndis_initialize_complete *init_complete; |
4d643114 | 559 | u32 status; |
98d79690 | 560 | int ret, t; |
fceaf24a | 561 | |
9c26aa0d | 562 | request = get_rndis_request(dev, REMOTE_NDIS_INITIALIZE_MSG, |
0120ee0d GKH |
563 | RNDIS_MESSAGE_SIZE(struct rndis_initialize_request)); |
564 | if (!request) { | |
bc49b926 | 565 | ret = -ENOMEM; |
fceaf24a HJ |
566 | goto Cleanup; |
567 | } | |
568 | ||
454f18a9 | 569 | /* Setup the rndis set */ |
a388eb17 HZ |
570 | init = &request->request_msg.msg.init_req; |
571 | init->major_ver = RNDIS_MAJOR_VERSION; | |
572 | init->minor_ver = RNDIS_MINOR_VERSION; | |
0120ee0d | 573 | /* FIXME: Use 1536 - rounded ethernet frame size */ |
a388eb17 | 574 | init->max_xfer_size = 2048; |
fceaf24a | 575 | |
c2a4efdd | 576 | dev->state = RNDIS_DEV_INITIALIZING; |
fceaf24a | 577 | |
9c26aa0d | 578 | ret = rndis_filter_send_request(dev, request); |
0120ee0d | 579 | if (ret != 0) { |
c2a4efdd | 580 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
581 | goto Cleanup; |
582 | } | |
583 | ||
0c3b7b2f | 584 | |
5c5781b3 | 585 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 S |
586 | |
587 | if (t == 0) { | |
0c3b7b2f S |
588 | ret = -ETIMEDOUT; |
589 | goto Cleanup; | |
590 | } | |
fceaf24a | 591 | |
a388eb17 HZ |
592 | init_complete = &request->response_msg.msg.init_complete; |
593 | status = init_complete->status; | |
0120ee0d | 594 | if (status == RNDIS_STATUS_SUCCESS) { |
c2a4efdd | 595 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 596 | ret = 0; |
0120ee0d | 597 | } else { |
c2a4efdd | 598 | dev->state = RNDIS_DEV_UNINITIALIZED; |
bc49b926 | 599 | ret = -EINVAL; |
fceaf24a HJ |
600 | } |
601 | ||
602 | Cleanup: | |
603 | if (request) | |
9c26aa0d | 604 | put_rndis_request(dev, request); |
fceaf24a HJ |
605 | |
606 | return ret; | |
607 | } | |
608 | ||
9c26aa0d | 609 | static void rndis_filter_halt_device(struct rndis_device *dev) |
fceaf24a | 610 | { |
e681b954 | 611 | struct rndis_request *request; |
9f33d054 | 612 | struct rndis_halt_request *halt; |
fceaf24a | 613 | |
454f18a9 | 614 | /* Attempt to do a rndis device halt */ |
9c26aa0d | 615 | request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG, |
0120ee0d | 616 | RNDIS_MESSAGE_SIZE(struct rndis_halt_request)); |
fceaf24a | 617 | if (!request) |
fceaf24a | 618 | goto Cleanup; |
fceaf24a | 619 | |
454f18a9 | 620 | /* Setup the rndis set */ |
a388eb17 HZ |
621 | halt = &request->request_msg.msg.halt_req; |
622 | halt->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 623 | |
454f18a9 | 624 | /* Ignore return since this msg is optional. */ |
9c26aa0d | 625 | rndis_filter_send_request(dev, request); |
fceaf24a | 626 | |
c2a4efdd | 627 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
628 | |
629 | Cleanup: | |
630 | if (request) | |
9c26aa0d | 631 | put_rndis_request(dev, request); |
fceaf24a HJ |
632 | return; |
633 | } | |
634 | ||
9c26aa0d | 635 | static int rndis_filter_open_device(struct rndis_device *dev) |
fceaf24a | 636 | { |
0120ee0d | 637 | int ret; |
fceaf24a | 638 | |
c2a4efdd | 639 | if (dev->state != RNDIS_DEV_INITIALIZED) |
fceaf24a HJ |
640 | return 0; |
641 | ||
9c26aa0d | 642 | ret = rndis_filter_set_packet_filter(dev, |
0120ee0d | 643 | NDIS_PACKET_TYPE_BROADCAST | |
95beae90 | 644 | NDIS_PACKET_TYPE_ALL_MULTICAST | |
0120ee0d | 645 | NDIS_PACKET_TYPE_DIRECTED); |
fceaf24a | 646 | if (ret == 0) |
c2a4efdd | 647 | dev->state = RNDIS_DEV_DATAINITIALIZED; |
fceaf24a | 648 | |
fceaf24a HJ |
649 | return ret; |
650 | } | |
651 | ||
9c26aa0d | 652 | static int rndis_filter_close_device(struct rndis_device *dev) |
fceaf24a HJ |
653 | { |
654 | int ret; | |
655 | ||
c2a4efdd | 656 | if (dev->state != RNDIS_DEV_DATAINITIALIZED) |
fceaf24a HJ |
657 | return 0; |
658 | ||
9c26aa0d | 659 | ret = rndis_filter_set_packet_filter(dev, 0); |
fceaf24a | 660 | if (ret == 0) |
c2a4efdd | 661 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 662 | |
fceaf24a HJ |
663 | return ret; |
664 | } | |
665 | ||
bdbad576 | 666 | int rndis_filter_device_add(struct hv_device *dev, |
c2a4efdd | 667 | void *additional_info) |
fceaf24a HJ |
668 | { |
669 | int ret; | |
ce9ea4cf | 670 | struct netvsc_device *netDevice; |
e681b954 | 671 | struct rndis_device *rndisDevice; |
c2a4efdd | 672 | struct netvsc_device_info *deviceInfo = additional_info; |
fceaf24a | 673 | |
9c26aa0d | 674 | rndisDevice = get_rndis_device(); |
83c720ea | 675 | if (!rndisDevice) |
fceaf24a | 676 | return -1; |
fceaf24a | 677 | |
0120ee0d GKH |
678 | /* |
679 | * Let the inner driver handle this first to create the netvsc channel | |
680 | * NOTE! Once the channel is created, we may get a receive callback | |
681 | * (RndisFilterOnReceive()) before this call is completed | |
682 | */ | |
ce5bf661 | 683 | ret = netvsc_device_add(dev, additional_info); |
0120ee0d GKH |
684 | if (ret != 0) { |
685 | kfree(rndisDevice); | |
fceaf24a HJ |
686 | return ret; |
687 | } | |
688 | ||
454f18a9 BP |
689 | |
690 | /* Initialize the rndis device */ | |
ca623ad3 | 691 | netDevice = dev->ext; |
fceaf24a | 692 | |
53d21fdb | 693 | netDevice->extension = rndisDevice; |
c2a4efdd | 694 | rndisDevice->net_dev = netDevice; |
fceaf24a | 695 | |
454f18a9 | 696 | /* Send the rndis initialization message */ |
9c26aa0d | 697 | ret = rndis_filter_init_device(rndisDevice); |
0120ee0d GKH |
698 | if (ret != 0) { |
699 | /* | |
700 | * TODO: If rndis init failed, we will need to shut down the | |
701 | * channel | |
702 | */ | |
fceaf24a HJ |
703 | } |
704 | ||
454f18a9 | 705 | /* Get the mac address */ |
9c26aa0d | 706 | ret = rndis_filter_query_device_mac(rndisDevice); |
0120ee0d GKH |
707 | if (ret != 0) { |
708 | /* | |
709 | * TODO: shutdown rndis device and the channel | |
710 | */ | |
fceaf24a HJ |
711 | } |
712 | ||
72a2f5bd | 713 | memcpy(deviceInfo->mac_adr, rndisDevice->hw_mac_adr, ETH_ALEN); |
fceaf24a | 714 | |
9c26aa0d | 715 | rndis_filter_query_device_link_status(rndisDevice); |
fceaf24a | 716 | |
72a2f5bd | 717 | deviceInfo->link_state = rndisDevice->link_stat; |
eb335bc4 HJ |
718 | |
719 | dev_info(&dev->device, "Device MAC %pM link state %s", | |
720 | rndisDevice->hw_mac_adr, | |
721 | ((deviceInfo->link_state) ? ("down\n") : ("up\n"))); | |
fceaf24a | 722 | |
fceaf24a HJ |
723 | return ret; |
724 | } | |
725 | ||
df06bcff | 726 | void rndis_filter_device_remove(struct hv_device *dev) |
fceaf24a | 727 | { |
ca623ad3 | 728 | struct netvsc_device *net_dev = dev->ext; |
53d21fdb | 729 | struct rndis_device *rndis_dev = net_dev->extension; |
fceaf24a | 730 | |
454f18a9 | 731 | /* Halt and release the rndis device */ |
9c26aa0d | 732 | rndis_filter_halt_device(rndis_dev); |
fceaf24a | 733 | |
c2a4efdd | 734 | kfree(rndis_dev); |
53d21fdb | 735 | net_dev->extension = NULL; |
fceaf24a | 736 | |
3fae5c8f | 737 | netvsc_device_remove(dev); |
fceaf24a HJ |
738 | } |
739 | ||
fceaf24a | 740 | |
9c26aa0d | 741 | int rndis_filter_open(struct hv_device *dev) |
fceaf24a | 742 | { |
ca623ad3 | 743 | struct netvsc_device *netDevice = dev->ext; |
fceaf24a | 744 | |
8a62d716 BP |
745 | if (!netDevice) |
746 | return -EINVAL; | |
747 | ||
53d21fdb | 748 | return rndis_filter_open_device(netDevice->extension); |
fceaf24a HJ |
749 | } |
750 | ||
9c26aa0d | 751 | int rndis_filter_close(struct hv_device *dev) |
fceaf24a | 752 | { |
ca623ad3 | 753 | struct netvsc_device *netDevice = dev->ext; |
fceaf24a | 754 | |
8a62d716 BP |
755 | if (!netDevice) |
756 | return -EINVAL; | |
757 | ||
53d21fdb | 758 | return rndis_filter_close_device(netDevice->extension); |
fceaf24a HJ |
759 | } |
760 | ||
0652aebc | 761 | int rndis_filter_send(struct hv_device *dev, |
c2a4efdd | 762 | struct hv_netvsc_packet *pkt) |
fceaf24a | 763 | { |
0120ee0d | 764 | int ret; |
e681b954 | 765 | struct rndis_filter_packet *filterPacket; |
9f33d054 GKH |
766 | struct rndis_message *rndisMessage; |
767 | struct rndis_packet *rndisPacket; | |
4d643114 | 768 | u32 rndisMessageSize; |
fceaf24a | 769 | |
454f18a9 | 770 | /* Add the rndis header */ |
72a2f5bd | 771 | filterPacket = (struct rndis_filter_packet *)pkt->extension; |
fceaf24a | 772 | |
e681b954 | 773 | memset(filterPacket, 0, sizeof(struct rndis_filter_packet)); |
fceaf24a | 774 | |
c2a4efdd | 775 | rndisMessage = &filterPacket->msg; |
9f33d054 | 776 | rndisMessageSize = RNDIS_MESSAGE_SIZE(struct rndis_packet); |
fceaf24a | 777 | |
a388eb17 HZ |
778 | rndisMessage->ndis_msg_type = REMOTE_NDIS_PACKET_MSG; |
779 | rndisMessage->msg_len = pkt->total_data_buflen + | |
0120ee0d | 780 | rndisMessageSize; |
fceaf24a | 781 | |
a388eb17 HZ |
782 | rndisPacket = &rndisMessage->msg.pkt; |
783 | rndisPacket->data_offset = sizeof(struct rndis_packet); | |
784 | rndisPacket->data_len = pkt->total_data_buflen; | |
fceaf24a | 785 | |
72a2f5bd | 786 | pkt->is_data_pkt = true; |
ca623ad3 HZ |
787 | pkt->page_buf[0].pfn = virt_to_phys(rndisMessage) >> PAGE_SHIFT; |
788 | pkt->page_buf[0].offset = | |
0120ee0d | 789 | (unsigned long)rndisMessage & (PAGE_SIZE-1); |
ca623ad3 | 790 | pkt->page_buf[0].len = rndisMessageSize; |
fceaf24a | 791 | |
454f18a9 | 792 | /* Save the packet send completion and context */ |
72a2f5bd | 793 | filterPacket->completion = pkt->completion.send.send_completion; |
c2a4efdd | 794 | filterPacket->completion_ctx = |
72a2f5bd | 795 | pkt->completion.send.send_completion_ctx; |
fceaf24a | 796 | |
454f18a9 | 797 | /* Use ours */ |
72a2f5bd HZ |
798 | pkt->completion.send.send_completion = rndis_filter_send_completion; |
799 | pkt->completion.send.send_completion_ctx = filterPacket; | |
fceaf24a | 800 | |
0ec6ff40 | 801 | ret = netvsc_send(dev, pkt); |
0120ee0d GKH |
802 | if (ret != 0) { |
803 | /* | |
804 | * Reset the completion to originals to allow retries from | |
805 | * above | |
806 | */ | |
72a2f5bd | 807 | pkt->completion.send.send_completion = |
c2a4efdd | 808 | filterPacket->completion; |
72a2f5bd | 809 | pkt->completion.send.send_completion_ctx = |
c2a4efdd | 810 | filterPacket->completion_ctx; |
fceaf24a HJ |
811 | } |
812 | ||
fceaf24a HJ |
813 | return ret; |
814 | } | |
815 | ||
9c26aa0d | 816 | static void rndis_filter_send_completion(void *ctx) |
fceaf24a | 817 | { |
c2a4efdd | 818 | struct rndis_filter_packet *filterPacket = ctx; |
fceaf24a | 819 | |
454f18a9 | 820 | /* Pass it back to the original handler */ |
c2a4efdd | 821 | filterPacket->completion(filterPacket->completion_ctx); |
fceaf24a HJ |
822 | } |
823 | ||
824 | ||
9c26aa0d | 825 | static void rndis_filter_send_request_completion(void *ctx) |
fceaf24a | 826 | { |
454f18a9 | 827 | /* Noop */ |
fceaf24a | 828 | } |