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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 | 29 | |
5ca7252a | 30 | #include "hyperv_net.h" |
fceaf24a | 31 | |
fceaf24a | 32 | |
e681b954 | 33 | enum rndis_device_state { |
fceaf24a HJ |
34 | RNDIS_DEV_UNINITIALIZED = 0, |
35 | RNDIS_DEV_INITIALIZING, | |
36 | RNDIS_DEV_INITIALIZED, | |
37 | RNDIS_DEV_DATAINITIALIZED, | |
e681b954 | 38 | }; |
fceaf24a | 39 | |
e681b954 | 40 | struct rndis_device { |
c2a4efdd | 41 | struct netvsc_device *net_dev; |
fceaf24a | 42 | |
c2a4efdd HZ |
43 | enum rndis_device_state state; |
44 | u32 link_stat; | |
45 | atomic_t new_req_id; | |
fceaf24a | 46 | |
880fb89c | 47 | spinlock_t request_lock; |
c2a4efdd | 48 | struct list_head req_list; |
fceaf24a | 49 | |
c2a4efdd | 50 | unsigned char hw_mac_adr[ETH_ALEN]; |
e681b954 | 51 | }; |
fceaf24a | 52 | |
e681b954 | 53 | struct rndis_request { |
c2a4efdd | 54 | struct list_head list_ent; |
98d79690 | 55 | struct completion wait_event; |
fceaf24a | 56 | |
0120ee0d GKH |
57 | /* |
58 | * FIXME: We assumed a fixed size response here. If we do ever need to | |
59 | * handle a bigger response, we can either define a max response | |
60 | * message or add a response buffer variable above this field | |
61 | */ | |
c2a4efdd | 62 | struct rndis_message response_msg; |
fceaf24a | 63 | |
454f18a9 | 64 | /* Simplify allocation by having a netvsc packet inline */ |
c2a4efdd HZ |
65 | struct hv_netvsc_packet pkt; |
66 | struct hv_page_buffer buf; | |
454f18a9 | 67 | /* FIXME: We assumed a fixed size request here. */ |
c2a4efdd | 68 | struct rndis_message request_msg; |
e681b954 | 69 | }; |
fceaf24a | 70 | |
9c26aa0d | 71 | static void rndis_filter_send_completion(void *ctx); |
0120ee0d | 72 | |
9c26aa0d | 73 | static void rndis_filter_send_request_completion(void *ctx); |
454f18a9 BP |
74 | |
75 | ||
fceaf24a | 76 | |
9c26aa0d | 77 | static struct rndis_device *get_rndis_device(void) |
fceaf24a | 78 | { |
e681b954 | 79 | struct rndis_device *device; |
fceaf24a | 80 | |
e681b954 | 81 | device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL); |
fceaf24a | 82 | if (!device) |
fceaf24a | 83 | return NULL; |
fceaf24a | 84 | |
880fb89c | 85 | spin_lock_init(&device->request_lock); |
fceaf24a | 86 | |
c2a4efdd | 87 | INIT_LIST_HEAD(&device->req_list); |
fceaf24a | 88 | |
c2a4efdd | 89 | device->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
90 | |
91 | return device; | |
92 | } | |
93 | ||
9c26aa0d | 94 | static struct rndis_request *get_rndis_request(struct rndis_device *dev, |
c2a4efdd HZ |
95 | u32 msg_type, |
96 | u32 msg_len) | |
fceaf24a | 97 | { |
e681b954 | 98 | struct rndis_request *request; |
c2a4efdd | 99 | struct rndis_message *rndis_msg; |
9f33d054 | 100 | struct rndis_set_request *set; |
880fb89c | 101 | unsigned long flags; |
fceaf24a | 102 | |
e681b954 | 103 | request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL); |
fceaf24a | 104 | if (!request) |
fceaf24a | 105 | return NULL; |
fceaf24a | 106 | |
98d79690 | 107 | init_completion(&request->wait_event); |
fceaf24a | 108 | |
c2a4efdd | 109 | rndis_msg = &request->request_msg; |
a388eb17 HZ |
110 | rndis_msg->ndis_msg_type = msg_type; |
111 | rndis_msg->msg_len = msg_len; | |
fceaf24a | 112 | |
0120ee0d GKH |
113 | /* |
114 | * Set the request id. This field is always after the rndis header for | |
115 | * request/response packet types so we just used the SetRequest as a | |
116 | * template | |
117 | */ | |
a388eb17 HZ |
118 | set = &rndis_msg->msg.set_req; |
119 | set->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 120 | |
454f18a9 | 121 | /* Add to the request list */ |
c2a4efdd HZ |
122 | spin_lock_irqsave(&dev->request_lock, flags); |
123 | list_add_tail(&request->list_ent, &dev->req_list); | |
124 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a HJ |
125 | |
126 | return request; | |
127 | } | |
128 | ||
9c26aa0d | 129 | static void put_rndis_request(struct rndis_device *dev, |
c2a4efdd | 130 | struct rndis_request *req) |
fceaf24a | 131 | { |
880fb89c GKH |
132 | unsigned long flags; |
133 | ||
c2a4efdd HZ |
134 | spin_lock_irqsave(&dev->request_lock, flags); |
135 | list_del(&req->list_ent); | |
136 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a | 137 | |
c2a4efdd | 138 | kfree(req); |
fceaf24a HJ |
139 | } |
140 | ||
729a2849 HZ |
141 | static void dump_rndis_message(struct hv_device *hv_dev, |
142 | struct rndis_message *rndis_msg) | |
fceaf24a | 143 | { |
2ddd5e5f S |
144 | struct net_device *netdev; |
145 | struct netvsc_device *net_device; | |
146 | ||
147 | net_device = hv_get_drvdata(hv_dev); | |
148 | netdev = net_device->ndev; | |
729a2849 | 149 | |
a388eb17 | 150 | switch (rndis_msg->ndis_msg_type) { |
fceaf24a | 151 | case REMOTE_NDIS_PACKET_MSG: |
729a2849 | 152 | netdev_dbg(netdev, "REMOTE_NDIS_PACKET_MSG (len %u, " |
0120ee0d GKH |
153 | "data offset %u data len %u, # oob %u, " |
154 | "oob offset %u, oob len %u, pkt offset %u, " | |
729a2849 | 155 | "pkt len %u\n", |
a388eb17 HZ |
156 | rndis_msg->msg_len, |
157 | rndis_msg->msg.pkt.data_offset, | |
158 | rndis_msg->msg.pkt.data_len, | |
159 | rndis_msg->msg.pkt.num_oob_data_elements, | |
160 | rndis_msg->msg.pkt.oob_data_offset, | |
161 | rndis_msg->msg.pkt.oob_data_len, | |
162 | rndis_msg->msg.pkt.per_pkt_info_offset, | |
163 | rndis_msg->msg.pkt.per_pkt_info_len); | |
fceaf24a HJ |
164 | break; |
165 | ||
166 | case REMOTE_NDIS_INITIALIZE_CMPLT: | |
729a2849 | 167 | netdev_dbg(netdev, "REMOTE_NDIS_INITIALIZE_CMPLT " |
0120ee0d GKH |
168 | "(len %u, id 0x%x, status 0x%x, major %d, minor %d, " |
169 | "device flags %d, max xfer size 0x%x, max pkts %u, " | |
729a2849 | 170 | "pkt aligned %u)\n", |
a388eb17 HZ |
171 | rndis_msg->msg_len, |
172 | rndis_msg->msg.init_complete.req_id, | |
173 | rndis_msg->msg.init_complete.status, | |
174 | rndis_msg->msg.init_complete.major_ver, | |
175 | rndis_msg->msg.init_complete.minor_ver, | |
176 | rndis_msg->msg.init_complete.dev_flags, | |
177 | rndis_msg->msg.init_complete.max_xfer_size, | |
178 | rndis_msg->msg.init_complete. | |
179 | max_pkt_per_msg, | |
180 | rndis_msg->msg.init_complete. | |
181 | pkt_alignment_factor); | |
fceaf24a HJ |
182 | break; |
183 | ||
184 | case REMOTE_NDIS_QUERY_CMPLT: | |
729a2849 | 185 | netdev_dbg(netdev, "REMOTE_NDIS_QUERY_CMPLT " |
0120ee0d | 186 | "(len %u, id 0x%x, status 0x%x, buf len %u, " |
729a2849 | 187 | "buf offset %u)\n", |
a388eb17 HZ |
188 | rndis_msg->msg_len, |
189 | rndis_msg->msg.query_complete.req_id, | |
190 | rndis_msg->msg.query_complete.status, | |
191 | rndis_msg->msg.query_complete. | |
192 | info_buflen, | |
193 | rndis_msg->msg.query_complete. | |
194 | info_buf_offset); | |
fceaf24a HJ |
195 | break; |
196 | ||
197 | case REMOTE_NDIS_SET_CMPLT: | |
729a2849 HZ |
198 | netdev_dbg(netdev, |
199 | "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)\n", | |
a388eb17 HZ |
200 | rndis_msg->msg_len, |
201 | rndis_msg->msg.set_complete.req_id, | |
202 | rndis_msg->msg.set_complete.status); | |
fceaf24a HJ |
203 | break; |
204 | ||
205 | case REMOTE_NDIS_INDICATE_STATUS_MSG: | |
729a2849 HZ |
206 | netdev_dbg(netdev, "REMOTE_NDIS_INDICATE_STATUS_MSG " |
207 | "(len %u, status 0x%x, buf len %u, buf offset %u)\n", | |
a388eb17 HZ |
208 | rndis_msg->msg_len, |
209 | rndis_msg->msg.indicate_status.status, | |
210 | rndis_msg->msg.indicate_status.status_buflen, | |
211 | rndis_msg->msg.indicate_status.status_buf_offset); | |
fceaf24a HJ |
212 | break; |
213 | ||
214 | default: | |
729a2849 | 215 | netdev_dbg(netdev, "0x%x (len %u)\n", |
a388eb17 HZ |
216 | rndis_msg->ndis_msg_type, |
217 | rndis_msg->msg_len); | |
fceaf24a HJ |
218 | break; |
219 | } | |
220 | } | |
221 | ||
9c26aa0d | 222 | static int rndis_filter_send_request(struct rndis_device *dev, |
c2a4efdd | 223 | struct rndis_request *req) |
fceaf24a | 224 | { |
0120ee0d | 225 | int ret; |
4193d4f4 | 226 | struct hv_netvsc_packet *packet; |
fceaf24a | 227 | |
454f18a9 | 228 | /* Setup the packet to send it */ |
c2a4efdd | 229 | packet = &req->pkt; |
fceaf24a | 230 | |
72a2f5bd | 231 | packet->is_data_pkt = false; |
a388eb17 | 232 | packet->total_data_buflen = req->request_msg.msg_len; |
72a2f5bd | 233 | packet->page_buf_cnt = 1; |
fceaf24a | 234 | |
ca623ad3 | 235 | packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >> |
0120ee0d | 236 | PAGE_SHIFT; |
ca623ad3 HZ |
237 | packet->page_buf[0].len = req->request_msg.msg_len; |
238 | packet->page_buf[0].offset = | |
c2a4efdd | 239 | (unsigned long)&req->request_msg & (PAGE_SIZE - 1); |
fceaf24a | 240 | |
72a2f5bd HZ |
241 | packet->completion.send.send_completion_ctx = req;/* packet; */ |
242 | packet->completion.send.send_completion = | |
9c26aa0d | 243 | rndis_filter_send_request_completion; |
72a2f5bd | 244 | packet->completion.send.send_completion_tid = (unsigned long)dev; |
fceaf24a | 245 | |
0ec6ff40 | 246 | ret = netvsc_send(dev->net_dev->dev, packet); |
fceaf24a HJ |
247 | return ret; |
248 | } | |
249 | ||
9c26aa0d | 250 | static void rndis_filter_receive_response(struct rndis_device *dev, |
c2a4efdd | 251 | struct rndis_message *resp) |
fceaf24a | 252 | { |
e681b954 | 253 | struct rndis_request *request = NULL; |
0e727613 | 254 | bool found = false; |
880fb89c | 255 | unsigned long flags; |
2ddd5e5f S |
256 | struct net_device *ndev; |
257 | ||
258 | ndev = dev->net_dev->ndev; | |
fceaf24a | 259 | |
c2a4efdd HZ |
260 | spin_lock_irqsave(&dev->request_lock, flags); |
261 | list_for_each_entry(request, &dev->req_list, list_ent) { | |
0120ee0d GKH |
262 | /* |
263 | * All request/response message contains RequestId as the 1st | |
264 | * field | |
265 | */ | |
a388eb17 HZ |
266 | if (request->request_msg.msg.init_req.req_id |
267 | == resp->msg.init_complete.req_id) { | |
0e727613 | 268 | found = true; |
fceaf24a HJ |
269 | break; |
270 | } | |
271 | } | |
c2a4efdd | 272 | spin_unlock_irqrestore(&dev->request_lock, flags); |
fceaf24a | 273 | |
0120ee0d | 274 | if (found) { |
a388eb17 | 275 | if (resp->msg_len <= sizeof(struct rndis_message)) { |
c2a4efdd | 276 | memcpy(&request->response_msg, resp, |
a388eb17 | 277 | resp->msg_len); |
0120ee0d | 278 | } else { |
d9871158 | 279 | netdev_err(ndev, |
eb335bc4 HJ |
280 | "rndis response buffer overflow " |
281 | "detected (size %u max %zu)\n", | |
282 | resp->msg_len, | |
283 | sizeof(struct rndis_filter_packet)); | |
0120ee0d | 284 | |
a388eb17 | 285 | if (resp->ndis_msg_type == |
0120ee0d GKH |
286 | REMOTE_NDIS_RESET_CMPLT) { |
287 | /* does not have a request id field */ | |
a388eb17 HZ |
288 | request->response_msg.msg.reset_complete. |
289 | status = STATUS_BUFFER_OVERFLOW; | |
0120ee0d | 290 | } else { |
a388eb17 HZ |
291 | request->response_msg.msg. |
292 | init_complete.status = | |
c2a4efdd | 293 | STATUS_BUFFER_OVERFLOW; |
fceaf24a HJ |
294 | } |
295 | } | |
296 | ||
98d79690 | 297 | complete(&request->wait_event); |
0120ee0d | 298 | } else { |
d9871158 | 299 | netdev_err(ndev, |
eb335bc4 HJ |
300 | "no rndis request found for this response " |
301 | "(id 0x%x res type 0x%x)\n", | |
302 | resp->msg.init_complete.req_id, | |
303 | resp->ndis_msg_type); | |
fceaf24a | 304 | } |
fceaf24a HJ |
305 | } |
306 | ||
9c26aa0d | 307 | static void rndis_filter_receive_indicate_status(struct rndis_device *dev, |
c2a4efdd | 308 | struct rndis_message *resp) |
fceaf24a | 309 | { |
0120ee0d | 310 | struct rndis_indicate_status *indicate = |
a388eb17 | 311 | &resp->msg.indicate_status; |
fceaf24a | 312 | |
a388eb17 | 313 | if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) { |
39fb6aab | 314 | netvsc_linkstatus_callback( |
53d21fdb | 315 | dev->net_dev->dev, 1); |
a388eb17 | 316 | } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) { |
39fb6aab | 317 | netvsc_linkstatus_callback( |
53d21fdb | 318 | dev->net_dev->dev, 0); |
0120ee0d GKH |
319 | } else { |
320 | /* | |
321 | * TODO: | |
322 | */ | |
fceaf24a HJ |
323 | } |
324 | } | |
325 | ||
9c26aa0d | 326 | static void rndis_filter_receive_data(struct rndis_device *dev, |
c2a4efdd HZ |
327 | struct rndis_message *msg, |
328 | struct hv_netvsc_packet *pkt) | |
fceaf24a | 329 | { |
c2a4efdd HZ |
330 | struct rndis_packet *rndis_pkt; |
331 | u32 data_offset; | |
669c1fc6 | 332 | int i; |
fceaf24a | 333 | |
a388eb17 | 334 | rndis_pkt = &msg->msg.pkt; |
fceaf24a | 335 | |
0120ee0d GKH |
336 | /* |
337 | * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this | |
338 | * netvsc packet (ie TotalDataBufferLength != MessageLength) | |
339 | */ | |
fceaf24a | 340 | |
454f18a9 | 341 | /* Remove the rndis header and pass it back up the stack */ |
a388eb17 | 342 | data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset; |
fceaf24a | 343 | |
72a2f5bd | 344 | pkt->total_data_buflen -= data_offset; |
ca623ad3 HZ |
345 | pkt->page_buf[0].offset += data_offset; |
346 | pkt->page_buf[0].len -= data_offset; | |
fceaf24a | 347 | |
669c1fc6 HZ |
348 | /* Drop the 0th page, if rndis data go beyond page boundary */ |
349 | if (pkt->page_buf[0].offset >= PAGE_SIZE) { | |
350 | pkt->page_buf[1].offset = pkt->page_buf[0].offset - PAGE_SIZE; | |
351 | pkt->page_buf[1].len -= pkt->page_buf[1].offset; | |
352 | pkt->page_buf_cnt--; | |
353 | for (i = 0; i < pkt->page_buf_cnt; i++) | |
354 | pkt->page_buf[i] = pkt->page_buf[i+1]; | |
355 | } | |
356 | ||
72a2f5bd | 357 | pkt->is_data_pkt = true; |
fceaf24a | 358 | |
a25e1dbe | 359 | netvsc_recv_callback(dev->net_dev->dev, pkt); |
fceaf24a HJ |
360 | } |
361 | ||
5fcc4115 | 362 | int rndis_filter_receive(struct hv_device *dev, |
c2a4efdd | 363 | struct hv_netvsc_packet *pkt) |
fceaf24a | 364 | { |
2ddd5e5f | 365 | struct netvsc_device *net_dev = hv_get_drvdata(dev); |
c2a4efdd HZ |
366 | struct rndis_device *rndis_dev; |
367 | struct rndis_message rndis_msg; | |
368 | struct rndis_message *rndis_hdr; | |
2ddd5e5f S |
369 | struct net_device *ndev; |
370 | ||
371 | ndev = net_dev->ndev; | |
fceaf24a | 372 | |
c2a4efdd | 373 | if (!net_dev) |
8a62d716 BP |
374 | return -EINVAL; |
375 | ||
454f18a9 | 376 | /* Make sure the rndis device state is initialized */ |
53d21fdb | 377 | if (!net_dev->extension) { |
d9871158 | 378 | netdev_err(ndev, "got rndis message but no rndis device - " |
eb335bc4 | 379 | "dropping this message!\n"); |
62c0743e | 380 | return -ENODEV; |
fceaf24a HJ |
381 | } |
382 | ||
53d21fdb | 383 | rndis_dev = (struct rndis_device *)net_dev->extension; |
c2a4efdd | 384 | if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) { |
d9871158 | 385 | netdev_err(ndev, "got rndis message but rndis device " |
eb335bc4 | 386 | "uninitialized...dropping this message!\n"); |
62c0743e | 387 | return -ENODEV; |
fceaf24a HJ |
388 | } |
389 | ||
c2a4efdd | 390 | rndis_hdr = (struct rndis_message *)kmap_atomic( |
ca623ad3 | 391 | pfn_to_page(pkt->page_buf[0].pfn), KM_IRQ0); |
fceaf24a | 392 | |
c2a4efdd | 393 | rndis_hdr = (void *)((unsigned long)rndis_hdr + |
ca623ad3 | 394 | pkt->page_buf[0].offset); |
fceaf24a | 395 | |
454f18a9 | 396 | /* Make sure we got a valid rndis message */ |
a388eb17 HZ |
397 | if ((rndis_hdr->ndis_msg_type != REMOTE_NDIS_PACKET_MSG) && |
398 | (rndis_hdr->msg_len > sizeof(struct rndis_message))) { | |
d9871158 | 399 | netdev_err(ndev, "incoming rndis message buffer overflow " |
eb335bc4 | 400 | "detected (got %u, max %zu)..marking it an error!\n", |
a388eb17 | 401 | rndis_hdr->msg_len, |
0120ee0d | 402 | sizeof(struct rndis_message)); |
fceaf24a HJ |
403 | } |
404 | ||
c2a4efdd | 405 | memcpy(&rndis_msg, rndis_hdr, |
a388eb17 | 406 | (rndis_hdr->msg_len > sizeof(struct rndis_message)) ? |
0120ee0d | 407 | sizeof(struct rndis_message) : |
a388eb17 | 408 | rndis_hdr->msg_len); |
fceaf24a | 409 | |
ca623ad3 | 410 | kunmap_atomic(rndis_hdr - pkt->page_buf[0].offset, KM_IRQ0); |
fceaf24a | 411 | |
729a2849 | 412 | dump_rndis_message(dev, &rndis_msg); |
fceaf24a | 413 | |
a388eb17 | 414 | switch (rndis_msg.ndis_msg_type) { |
fceaf24a | 415 | case REMOTE_NDIS_PACKET_MSG: |
0120ee0d | 416 | /* data msg */ |
9c26aa0d | 417 | rndis_filter_receive_data(rndis_dev, &rndis_msg, pkt); |
fceaf24a HJ |
418 | break; |
419 | ||
fceaf24a HJ |
420 | case REMOTE_NDIS_INITIALIZE_CMPLT: |
421 | case REMOTE_NDIS_QUERY_CMPLT: | |
422 | case REMOTE_NDIS_SET_CMPLT: | |
0120ee0d | 423 | /* completion msgs */ |
9c26aa0d | 424 | rndis_filter_receive_response(rndis_dev, &rndis_msg); |
fceaf24a HJ |
425 | break; |
426 | ||
fceaf24a | 427 | case REMOTE_NDIS_INDICATE_STATUS_MSG: |
0120ee0d | 428 | /* notification msgs */ |
9c26aa0d | 429 | rndis_filter_receive_indicate_status(rndis_dev, &rndis_msg); |
fceaf24a HJ |
430 | break; |
431 | default: | |
d9871158 | 432 | netdev_err(ndev, |
eb335bc4 | 433 | "unhandled rndis message (type %u len %u)\n", |
a388eb17 HZ |
434 | rndis_msg.ndis_msg_type, |
435 | rndis_msg.msg_len); | |
fceaf24a HJ |
436 | break; |
437 | } | |
438 | ||
fceaf24a HJ |
439 | return 0; |
440 | } | |
441 | ||
9c26aa0d | 442 | static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, |
c2a4efdd | 443 | void *result, u32 *result_size) |
fceaf24a | 444 | { |
e681b954 | 445 | struct rndis_request *request; |
c2a4efdd | 446 | u32 inresult_size = *result_size; |
9f33d054 | 447 | struct rndis_query_request *query; |
c2a4efdd | 448 | struct rndis_query_complete *query_complete; |
0120ee0d | 449 | int ret = 0; |
98d79690 | 450 | int t; |
fceaf24a | 451 | |
c2a4efdd | 452 | if (!result) |
8a62d716 | 453 | return -EINVAL; |
fceaf24a | 454 | |
c2a4efdd | 455 | *result_size = 0; |
9c26aa0d | 456 | request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG, |
0120ee0d GKH |
457 | RNDIS_MESSAGE_SIZE(struct rndis_query_request)); |
458 | if (!request) { | |
de6e0580 | 459 | ret = -ENOMEM; |
1c627870 | 460 | goto cleanup; |
fceaf24a HJ |
461 | } |
462 | ||
454f18a9 | 463 | /* Setup the rndis query */ |
a388eb17 HZ |
464 | query = &request->request_msg.msg.query_req; |
465 | query->oid = oid; | |
466 | query->info_buf_offset = sizeof(struct rndis_query_request); | |
467 | query->info_buflen = 0; | |
468 | query->dev_vc_handle = 0; | |
fceaf24a | 469 | |
9c26aa0d | 470 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 471 | if (ret != 0) |
1c627870 | 472 | goto cleanup; |
fceaf24a | 473 | |
5c5781b3 | 474 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 | 475 | if (t == 0) { |
0c3b7b2f | 476 | ret = -ETIMEDOUT; |
1c627870 | 477 | goto cleanup; |
0c3b7b2f | 478 | } |
fceaf24a | 479 | |
454f18a9 | 480 | /* Copy the response back */ |
a388eb17 | 481 | query_complete = &request->response_msg.msg.query_complete; |
fceaf24a | 482 | |
a388eb17 | 483 | if (query_complete->info_buflen > inresult_size) { |
fceaf24a | 484 | ret = -1; |
1c627870 | 485 | goto cleanup; |
fceaf24a HJ |
486 | } |
487 | ||
c2a4efdd HZ |
488 | memcpy(result, |
489 | (void *)((unsigned long)query_complete + | |
a388eb17 HZ |
490 | query_complete->info_buf_offset), |
491 | query_complete->info_buflen); | |
fceaf24a | 492 | |
a388eb17 | 493 | *result_size = query_complete->info_buflen; |
fceaf24a | 494 | |
1c627870 | 495 | cleanup: |
fceaf24a | 496 | if (request) |
9c26aa0d | 497 | put_rndis_request(dev, request); |
fceaf24a HJ |
498 | |
499 | return ret; | |
500 | } | |
501 | ||
9c26aa0d | 502 | static int rndis_filter_query_device_mac(struct rndis_device *dev) |
fceaf24a | 503 | { |
9f8bd8ba | 504 | u32 size = ETH_ALEN; |
fceaf24a | 505 | |
9c26aa0d | 506 | return rndis_filter_query_device(dev, |
0120ee0d | 507 | RNDIS_OID_802_3_PERMANENT_ADDRESS, |
c2a4efdd | 508 | dev->hw_mac_adr, &size); |
fceaf24a HJ |
509 | } |
510 | ||
9c26aa0d | 511 | static int rndis_filter_query_device_link_status(struct rndis_device *dev) |
fceaf24a | 512 | { |
0120ee0d | 513 | u32 size = sizeof(u32); |
fceaf24a | 514 | |
9c26aa0d | 515 | return rndis_filter_query_device(dev, |
0120ee0d | 516 | RNDIS_OID_GEN_MEDIA_CONNECT_STATUS, |
c2a4efdd | 517 | &dev->link_stat, &size); |
fceaf24a HJ |
518 | } |
519 | ||
9c26aa0d | 520 | static int rndis_filter_set_packet_filter(struct rndis_device *dev, |
c2a4efdd | 521 | u32 new_filter) |
fceaf24a | 522 | { |
e681b954 | 523 | struct rndis_request *request; |
9f33d054 | 524 | struct rndis_set_request *set; |
c2a4efdd | 525 | struct rndis_set_complete *set_complete; |
4d643114 | 526 | u32 status; |
98d79690 | 527 | int ret, t; |
2ddd5e5f S |
528 | struct net_device *ndev; |
529 | ||
530 | ndev = dev->net_dev->ndev; | |
fceaf24a | 531 | |
9c26aa0d | 532 | request = get_rndis_request(dev, REMOTE_NDIS_SET_MSG, |
0120ee0d GKH |
533 | RNDIS_MESSAGE_SIZE(struct rndis_set_request) + |
534 | sizeof(u32)); | |
535 | if (!request) { | |
58ef3977 | 536 | ret = -ENOMEM; |
1c627870 | 537 | goto cleanup; |
fceaf24a HJ |
538 | } |
539 | ||
454f18a9 | 540 | /* Setup the rndis set */ |
a388eb17 HZ |
541 | set = &request->request_msg.msg.set_req; |
542 | set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER; | |
543 | set->info_buflen = sizeof(u32); | |
544 | set->info_buf_offset = sizeof(struct rndis_set_request); | |
fceaf24a | 545 | |
0120ee0d | 546 | memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request), |
c2a4efdd | 547 | &new_filter, sizeof(u32)); |
fceaf24a | 548 | |
9c26aa0d | 549 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 550 | if (ret != 0) |
1c627870 | 551 | goto cleanup; |
fceaf24a | 552 | |
5c5781b3 | 553 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 S |
554 | |
555 | if (t == 0) { | |
d9871158 | 556 | netdev_err(ndev, |
eb335bc4 | 557 | "timeout before we got a set response...\n"); |
0120ee0d | 558 | /* |
25985edc | 559 | * We can't deallocate the request since we may still receive a |
0120ee0d GKH |
560 | * send completion for it. |
561 | */ | |
5585d81e | 562 | goto exit; |
0120ee0d | 563 | } else { |
a388eb17 HZ |
564 | set_complete = &request->response_msg.msg.set_complete; |
565 | status = set_complete->status; | |
fceaf24a HJ |
566 | } |
567 | ||
1c627870 | 568 | cleanup: |
fceaf24a | 569 | if (request) |
9c26aa0d | 570 | put_rndis_request(dev, request); |
5585d81e | 571 | exit: |
fceaf24a HJ |
572 | return ret; |
573 | } | |
574 | ||
fceaf24a | 575 | |
9c26aa0d | 576 | static int rndis_filter_init_device(struct rndis_device *dev) |
fceaf24a | 577 | { |
e681b954 | 578 | struct rndis_request *request; |
9f33d054 | 579 | struct rndis_initialize_request *init; |
c2a4efdd | 580 | struct rndis_initialize_complete *init_complete; |
4d643114 | 581 | u32 status; |
98d79690 | 582 | int ret, t; |
fceaf24a | 583 | |
9c26aa0d | 584 | request = get_rndis_request(dev, REMOTE_NDIS_INITIALIZE_MSG, |
0120ee0d GKH |
585 | RNDIS_MESSAGE_SIZE(struct rndis_initialize_request)); |
586 | if (!request) { | |
bc49b926 | 587 | ret = -ENOMEM; |
1c627870 | 588 | goto cleanup; |
fceaf24a HJ |
589 | } |
590 | ||
454f18a9 | 591 | /* Setup the rndis set */ |
a388eb17 HZ |
592 | init = &request->request_msg.msg.init_req; |
593 | init->major_ver = RNDIS_MAJOR_VERSION; | |
594 | init->minor_ver = RNDIS_MINOR_VERSION; | |
0120ee0d | 595 | /* FIXME: Use 1536 - rounded ethernet frame size */ |
a388eb17 | 596 | init->max_xfer_size = 2048; |
fceaf24a | 597 | |
c2a4efdd | 598 | dev->state = RNDIS_DEV_INITIALIZING; |
fceaf24a | 599 | |
9c26aa0d | 600 | ret = rndis_filter_send_request(dev, request); |
0120ee0d | 601 | if (ret != 0) { |
c2a4efdd | 602 | dev->state = RNDIS_DEV_UNINITIALIZED; |
1c627870 | 603 | goto cleanup; |
fceaf24a HJ |
604 | } |
605 | ||
0c3b7b2f | 606 | |
5c5781b3 | 607 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 S |
608 | |
609 | if (t == 0) { | |
0c3b7b2f | 610 | ret = -ETIMEDOUT; |
1c627870 | 611 | goto cleanup; |
0c3b7b2f | 612 | } |
fceaf24a | 613 | |
a388eb17 HZ |
614 | init_complete = &request->response_msg.msg.init_complete; |
615 | status = init_complete->status; | |
0120ee0d | 616 | if (status == RNDIS_STATUS_SUCCESS) { |
c2a4efdd | 617 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 618 | ret = 0; |
0120ee0d | 619 | } else { |
c2a4efdd | 620 | dev->state = RNDIS_DEV_UNINITIALIZED; |
bc49b926 | 621 | ret = -EINVAL; |
fceaf24a HJ |
622 | } |
623 | ||
1c627870 | 624 | cleanup: |
fceaf24a | 625 | if (request) |
9c26aa0d | 626 | put_rndis_request(dev, request); |
fceaf24a HJ |
627 | |
628 | return ret; | |
629 | } | |
630 | ||
9c26aa0d | 631 | static void rndis_filter_halt_device(struct rndis_device *dev) |
fceaf24a | 632 | { |
e681b954 | 633 | struct rndis_request *request; |
9f33d054 | 634 | struct rndis_halt_request *halt; |
fceaf24a | 635 | |
454f18a9 | 636 | /* Attempt to do a rndis device halt */ |
9c26aa0d | 637 | request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG, |
0120ee0d | 638 | RNDIS_MESSAGE_SIZE(struct rndis_halt_request)); |
fceaf24a | 639 | if (!request) |
1c627870 | 640 | goto cleanup; |
fceaf24a | 641 | |
454f18a9 | 642 | /* Setup the rndis set */ |
a388eb17 HZ |
643 | halt = &request->request_msg.msg.halt_req; |
644 | halt->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 645 | |
454f18a9 | 646 | /* Ignore return since this msg is optional. */ |
9c26aa0d | 647 | rndis_filter_send_request(dev, request); |
fceaf24a | 648 | |
c2a4efdd | 649 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a | 650 | |
1c627870 | 651 | cleanup: |
fceaf24a | 652 | if (request) |
9c26aa0d | 653 | put_rndis_request(dev, request); |
fceaf24a HJ |
654 | return; |
655 | } | |
656 | ||
9c26aa0d | 657 | static int rndis_filter_open_device(struct rndis_device *dev) |
fceaf24a | 658 | { |
0120ee0d | 659 | int ret; |
fceaf24a | 660 | |
c2a4efdd | 661 | if (dev->state != RNDIS_DEV_INITIALIZED) |
fceaf24a HJ |
662 | return 0; |
663 | ||
9c26aa0d | 664 | ret = rndis_filter_set_packet_filter(dev, |
0120ee0d | 665 | NDIS_PACKET_TYPE_BROADCAST | |
95beae90 | 666 | NDIS_PACKET_TYPE_ALL_MULTICAST | |
0120ee0d | 667 | NDIS_PACKET_TYPE_DIRECTED); |
fceaf24a | 668 | if (ret == 0) |
c2a4efdd | 669 | dev->state = RNDIS_DEV_DATAINITIALIZED; |
fceaf24a | 670 | |
fceaf24a HJ |
671 | return ret; |
672 | } | |
673 | ||
9c26aa0d | 674 | static int rndis_filter_close_device(struct rndis_device *dev) |
fceaf24a HJ |
675 | { |
676 | int ret; | |
677 | ||
c2a4efdd | 678 | if (dev->state != RNDIS_DEV_DATAINITIALIZED) |
fceaf24a HJ |
679 | return 0; |
680 | ||
9c26aa0d | 681 | ret = rndis_filter_set_packet_filter(dev, 0); |
fceaf24a | 682 | if (ret == 0) |
c2a4efdd | 683 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 684 | |
fceaf24a HJ |
685 | return ret; |
686 | } | |
687 | ||
bdbad576 | 688 | int rndis_filter_device_add(struct hv_device *dev, |
c2a4efdd | 689 | void *additional_info) |
fceaf24a HJ |
690 | { |
691 | int ret; | |
86c921af | 692 | struct netvsc_device *net_device; |
e681b954 | 693 | struct rndis_device *rndisDevice; |
c2a4efdd | 694 | struct netvsc_device_info *deviceInfo = additional_info; |
fceaf24a | 695 | |
9c26aa0d | 696 | rndisDevice = get_rndis_device(); |
83c720ea | 697 | if (!rndisDevice) |
327efbae | 698 | return -ENODEV; |
fceaf24a | 699 | |
0120ee0d GKH |
700 | /* |
701 | * Let the inner driver handle this first to create the netvsc channel | |
702 | * NOTE! Once the channel is created, we may get a receive callback | |
703 | * (RndisFilterOnReceive()) before this call is completed | |
704 | */ | |
ce5bf661 | 705 | ret = netvsc_device_add(dev, additional_info); |
0120ee0d GKH |
706 | if (ret != 0) { |
707 | kfree(rndisDevice); | |
fceaf24a HJ |
708 | return ret; |
709 | } | |
710 | ||
454f18a9 BP |
711 | |
712 | /* Initialize the rndis device */ | |
86c921af | 713 | net_device = hv_get_drvdata(dev); |
fceaf24a | 714 | |
86c921af S |
715 | net_device->extension = rndisDevice; |
716 | rndisDevice->net_dev = net_device; | |
fceaf24a | 717 | |
454f18a9 | 718 | /* Send the rndis initialization message */ |
9c26aa0d | 719 | ret = rndis_filter_init_device(rndisDevice); |
0120ee0d GKH |
720 | if (ret != 0) { |
721 | /* | |
722 | * TODO: If rndis init failed, we will need to shut down the | |
723 | * channel | |
724 | */ | |
fceaf24a HJ |
725 | } |
726 | ||
454f18a9 | 727 | /* Get the mac address */ |
9c26aa0d | 728 | ret = rndis_filter_query_device_mac(rndisDevice); |
0120ee0d GKH |
729 | if (ret != 0) { |
730 | /* | |
731 | * TODO: shutdown rndis device and the channel | |
732 | */ | |
fceaf24a HJ |
733 | } |
734 | ||
72a2f5bd | 735 | memcpy(deviceInfo->mac_adr, rndisDevice->hw_mac_adr, ETH_ALEN); |
fceaf24a | 736 | |
9c26aa0d | 737 | rndis_filter_query_device_link_status(rndisDevice); |
fceaf24a | 738 | |
72a2f5bd | 739 | deviceInfo->link_state = rndisDevice->link_stat; |
eb335bc4 HJ |
740 | |
741 | dev_info(&dev->device, "Device MAC %pM link state %s", | |
742 | rndisDevice->hw_mac_adr, | |
743 | ((deviceInfo->link_state) ? ("down\n") : ("up\n"))); | |
fceaf24a | 744 | |
fceaf24a HJ |
745 | return ret; |
746 | } | |
747 | ||
df06bcff | 748 | void rndis_filter_device_remove(struct hv_device *dev) |
fceaf24a | 749 | { |
2ddd5e5f | 750 | struct netvsc_device *net_dev = hv_get_drvdata(dev); |
53d21fdb | 751 | struct rndis_device *rndis_dev = net_dev->extension; |
fceaf24a | 752 | |
454f18a9 | 753 | /* Halt and release the rndis device */ |
9c26aa0d | 754 | rndis_filter_halt_device(rndis_dev); |
fceaf24a | 755 | |
c2a4efdd | 756 | kfree(rndis_dev); |
53d21fdb | 757 | net_dev->extension = NULL; |
fceaf24a | 758 | |
3fae5c8f | 759 | netvsc_device_remove(dev); |
fceaf24a HJ |
760 | } |
761 | ||
fceaf24a | 762 | |
9c26aa0d | 763 | int rndis_filter_open(struct hv_device *dev) |
fceaf24a | 764 | { |
86c921af | 765 | struct netvsc_device *net_device = hv_get_drvdata(dev); |
fceaf24a | 766 | |
86c921af | 767 | if (!net_device) |
8a62d716 BP |
768 | return -EINVAL; |
769 | ||
86c921af | 770 | return rndis_filter_open_device(net_device->extension); |
fceaf24a HJ |
771 | } |
772 | ||
9c26aa0d | 773 | int rndis_filter_close(struct hv_device *dev) |
fceaf24a | 774 | { |
2ddd5e5f | 775 | struct netvsc_device *netDevice = hv_get_drvdata(dev); |
fceaf24a | 776 | |
8a62d716 BP |
777 | if (!netDevice) |
778 | return -EINVAL; | |
779 | ||
53d21fdb | 780 | return rndis_filter_close_device(netDevice->extension); |
fceaf24a HJ |
781 | } |
782 | ||
0652aebc | 783 | int rndis_filter_send(struct hv_device *dev, |
c2a4efdd | 784 | struct hv_netvsc_packet *pkt) |
fceaf24a | 785 | { |
0120ee0d | 786 | int ret; |
e681b954 | 787 | struct rndis_filter_packet *filterPacket; |
9f33d054 GKH |
788 | struct rndis_message *rndisMessage; |
789 | struct rndis_packet *rndisPacket; | |
4d643114 | 790 | u32 rndisMessageSize; |
fceaf24a | 791 | |
454f18a9 | 792 | /* Add the rndis header */ |
72a2f5bd | 793 | filterPacket = (struct rndis_filter_packet *)pkt->extension; |
fceaf24a | 794 | |
e681b954 | 795 | memset(filterPacket, 0, sizeof(struct rndis_filter_packet)); |
fceaf24a | 796 | |
c2a4efdd | 797 | rndisMessage = &filterPacket->msg; |
9f33d054 | 798 | rndisMessageSize = RNDIS_MESSAGE_SIZE(struct rndis_packet); |
fceaf24a | 799 | |
a388eb17 HZ |
800 | rndisMessage->ndis_msg_type = REMOTE_NDIS_PACKET_MSG; |
801 | rndisMessage->msg_len = pkt->total_data_buflen + | |
0120ee0d | 802 | rndisMessageSize; |
fceaf24a | 803 | |
a388eb17 HZ |
804 | rndisPacket = &rndisMessage->msg.pkt; |
805 | rndisPacket->data_offset = sizeof(struct rndis_packet); | |
806 | rndisPacket->data_len = pkt->total_data_buflen; | |
fceaf24a | 807 | |
72a2f5bd | 808 | pkt->is_data_pkt = true; |
ca623ad3 HZ |
809 | pkt->page_buf[0].pfn = virt_to_phys(rndisMessage) >> PAGE_SHIFT; |
810 | pkt->page_buf[0].offset = | |
0120ee0d | 811 | (unsigned long)rndisMessage & (PAGE_SIZE-1); |
ca623ad3 | 812 | pkt->page_buf[0].len = rndisMessageSize; |
fceaf24a | 813 | |
454f18a9 | 814 | /* Save the packet send completion and context */ |
72a2f5bd | 815 | filterPacket->completion = pkt->completion.send.send_completion; |
c2a4efdd | 816 | filterPacket->completion_ctx = |
72a2f5bd | 817 | pkt->completion.send.send_completion_ctx; |
fceaf24a | 818 | |
454f18a9 | 819 | /* Use ours */ |
72a2f5bd HZ |
820 | pkt->completion.send.send_completion = rndis_filter_send_completion; |
821 | pkt->completion.send.send_completion_ctx = filterPacket; | |
fceaf24a | 822 | |
0ec6ff40 | 823 | ret = netvsc_send(dev, pkt); |
0120ee0d GKH |
824 | if (ret != 0) { |
825 | /* | |
826 | * Reset the completion to originals to allow retries from | |
827 | * above | |
828 | */ | |
72a2f5bd | 829 | pkt->completion.send.send_completion = |
c2a4efdd | 830 | filterPacket->completion; |
72a2f5bd | 831 | pkt->completion.send.send_completion_ctx = |
c2a4efdd | 832 | filterPacket->completion_ctx; |
fceaf24a HJ |
833 | } |
834 | ||
fceaf24a HJ |
835 | return ret; |
836 | } | |
837 | ||
9c26aa0d | 838 | static void rndis_filter_send_completion(void *ctx) |
fceaf24a | 839 | { |
c2a4efdd | 840 | struct rndis_filter_packet *filterPacket = ctx; |
fceaf24a | 841 | |
454f18a9 | 842 | /* Pass it back to the original handler */ |
c2a4efdd | 843 | filterPacket->completion(filterPacket->completion_ctx); |
fceaf24a HJ |
844 | } |
845 | ||
846 | ||
9c26aa0d | 847 | static void rndis_filter_send_request_completion(void *ctx) |
fceaf24a | 848 | { |
454f18a9 | 849 | /* Noop */ |
fceaf24a | 850 | } |