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Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
d0e94d17 | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 19 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 20 | */ |
eb335bc4 HJ |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
5654e932 | 23 | #include <linux/kernel.h> |
0c3b7b2f S |
24 | #include <linux/sched.h> |
25 | #include <linux/wait.h> | |
0ffa63b0 | 26 | #include <linux/mm.h> |
b4362c9c | 27 | #include <linux/delay.h> |
21a80820 | 28 | #include <linux/io.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
3f335ea2 S |
30 | |
31 | #include "hyperv.h" | |
5ca7252a | 32 | #include "hyperv_net.h" |
fceaf24a HJ |
33 | |
34 | ||
5a71ae30 | 35 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 36 | { |
85799a37 | 37 | struct netvsc_device *net_device; |
fceaf24a | 38 | |
85799a37 HZ |
39 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
40 | if (!net_device) | |
fceaf24a HJ |
41 | return NULL; |
42 | ||
454f18a9 | 43 | /* Set to 2 to allow both inbound and outbound traffic */ |
509ee387 | 44 | atomic_set(&net_device->refcnt, 2); |
fceaf24a | 45 | |
c38b9c71 | 46 | net_device->destroy = false; |
53d21fdb | 47 | net_device->dev = device; |
ca623ad3 | 48 | device->ext = net_device; |
fceaf24a | 49 | |
85799a37 | 50 | return net_device; |
fceaf24a HJ |
51 | } |
52 | ||
454f18a9 | 53 | /* Get the net device object iff exists and its refcount > 1 */ |
5a71ae30 | 54 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 55 | { |
85799a37 | 56 | struct netvsc_device *net_device; |
fceaf24a | 57 | |
ca623ad3 | 58 | net_device = device->ext; |
2ef77143 S |
59 | if (net_device && (atomic_read(&net_device->refcnt) > 1) && |
60 | !net_device->destroy) | |
53d21fdb | 61 | atomic_inc(&net_device->refcnt); |
fceaf24a | 62 | else |
85799a37 | 63 | net_device = NULL; |
fceaf24a | 64 | |
85799a37 | 65 | return net_device; |
fceaf24a HJ |
66 | } |
67 | ||
454f18a9 | 68 | /* Get the net device object iff exists and its refcount > 0 */ |
5a71ae30 | 69 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 70 | { |
85799a37 | 71 | struct netvsc_device *net_device; |
fceaf24a | 72 | |
ca623ad3 | 73 | net_device = device->ext; |
53d21fdb HZ |
74 | if (net_device && atomic_read(&net_device->refcnt)) |
75 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 76 | else |
85799a37 | 77 | net_device = NULL; |
fceaf24a | 78 | |
85799a37 | 79 | return net_device; |
fceaf24a HJ |
80 | } |
81 | ||
5a71ae30 | 82 | static void put_net_device(struct hv_device *device) |
fceaf24a | 83 | { |
85799a37 | 84 | struct netvsc_device *net_device; |
fceaf24a | 85 | |
ca623ad3 | 86 | net_device = device->ext; |
fceaf24a | 87 | |
53d21fdb | 88 | atomic_dec(&net_device->refcnt); |
fceaf24a HJ |
89 | } |
90 | ||
ec91cd09 HZ |
91 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
92 | { | |
93 | struct nvsp_message *revoke_packet; | |
94 | int ret = 0; | |
95 | ||
96 | /* | |
97 | * If we got a section count, it means we received a | |
98 | * SendReceiveBufferComplete msg (ie sent | |
99 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
100 | * to send a revoke msg here | |
101 | */ | |
102 | if (net_device->recv_section_cnt) { | |
103 | /* Send the revoke receive buffer */ | |
104 | revoke_packet = &net_device->revoke_packet; | |
105 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
106 | ||
107 | revoke_packet->hdr.msg_type = | |
108 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
109 | revoke_packet->msg.v1_msg. | |
110 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
111 | ||
112 | ret = vmbus_sendpacket(net_device->dev->channel, | |
113 | revoke_packet, | |
114 | sizeof(struct nvsp_message), | |
115 | (unsigned long)revoke_packet, | |
116 | VM_PKT_DATA_INBAND, 0); | |
117 | /* | |
118 | * If we failed here, we might as well return and | |
119 | * have a leak rather than continue and a bugchk | |
120 | */ | |
121 | if (ret != 0) { | |
122 | dev_err(&net_device->dev->device, "unable to send " | |
123 | "revoke receive buffer to netvsp"); | |
a3e00530 | 124 | return ret; |
ec91cd09 HZ |
125 | } |
126 | } | |
127 | ||
128 | /* Teardown the gpadl on the vsp end */ | |
129 | if (net_device->recv_buf_gpadl_handle) { | |
130 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
131 | net_device->recv_buf_gpadl_handle); | |
132 | ||
133 | /* If we failed here, we might as well return and have a leak | |
134 | * rather than continue and a bugchk | |
135 | */ | |
136 | if (ret != 0) { | |
137 | dev_err(&net_device->dev->device, | |
138 | "unable to teardown receive buffer's gpadl"); | |
a3e00530 | 139 | return -ret; |
ec91cd09 HZ |
140 | } |
141 | net_device->recv_buf_gpadl_handle = 0; | |
142 | } | |
143 | ||
144 | if (net_device->recv_buf) { | |
145 | /* Free up the receive buffer */ | |
146 | free_pages((unsigned long)net_device->recv_buf, | |
147 | get_order(net_device->recv_buf_size)); | |
148 | net_device->recv_buf = NULL; | |
149 | } | |
150 | ||
151 | if (net_device->recv_section) { | |
152 | net_device->recv_section_cnt = 0; | |
153 | kfree(net_device->recv_section); | |
154 | net_device->recv_section = NULL; | |
155 | } | |
156 | ||
157 | return ret; | |
158 | } | |
159 | ||
5a71ae30 | 160 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 161 | { |
21a80820 | 162 | int ret = 0; |
35abb21a | 163 | int t; |
85799a37 HZ |
164 | struct netvsc_device *net_device; |
165 | struct nvsp_message *init_packet; | |
fceaf24a | 166 | |
5a71ae30 | 167 | net_device = get_outbound_net_device(device); |
85799a37 | 168 | if (!net_device) { |
eb335bc4 | 169 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 170 | "device being destroyed?"); |
927bc33c | 171 | return -ENODEV; |
fceaf24a | 172 | } |
fceaf24a | 173 | |
53d21fdb | 174 | net_device->recv_buf = |
df3493e0 S |
175 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
176 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 177 | if (!net_device->recv_buf) { |
eb335bc4 HJ |
178 | dev_err(&device->device, "unable to allocate receive " |
179 | "buffer of size %d", net_device->recv_buf_size); | |
927bc33c | 180 | ret = -ENOMEM; |
0c3b7b2f | 181 | goto cleanup; |
fceaf24a | 182 | } |
fceaf24a | 183 | |
454f18a9 BP |
184 | /* |
185 | * Establish the gpadl handle for this buffer on this | |
186 | * channel. Note: This call uses the vmbus connection rather | |
187 | * than the channel to establish the gpadl handle. | |
188 | */ | |
53d21fdb HZ |
189 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
190 | net_device->recv_buf_size, | |
191 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 192 | if (ret != 0) { |
eb335bc4 HJ |
193 | dev_err(&device->device, |
194 | "unable to establish receive buffer's gpadl"); | |
0c3b7b2f | 195 | goto cleanup; |
fceaf24a HJ |
196 | } |
197 | ||
fceaf24a | 198 | |
454f18a9 | 199 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 200 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 201 | |
85799a37 | 202 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 203 | |
53d21fdb HZ |
204 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
205 | init_packet->msg.v1_msg.send_recv_buf. | |
206 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
207 | init_packet->msg.v1_msg. | |
208 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 209 | |
454f18a9 | 210 | /* Send the gpadl notification request */ |
85799a37 | 211 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 212 | sizeof(struct nvsp_message), |
85799a37 | 213 | (unsigned long)init_packet, |
415f2287 | 214 | VM_PKT_DATA_INBAND, |
5a4df290 | 215 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 216 | if (ret != 0) { |
eb335bc4 HJ |
217 | dev_err(&device->device, |
218 | "unable to send receive buffer's gpadl to netvsp"); | |
0c3b7b2f | 219 | goto cleanup; |
fceaf24a HJ |
220 | } |
221 | ||
5c5781b3 | 222 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 223 | BUG_ON(t == 0); |
0c3b7b2f | 224 | |
fceaf24a | 225 | |
454f18a9 | 226 | /* Check the response */ |
53d21fdb HZ |
227 | if (init_packet->msg.v1_msg. |
228 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
eb335bc4 | 229 | dev_err(&device->device, "Unable to complete receive buffer " |
21a80820 | 230 | "initialzation with NetVsp - status %d", |
53d21fdb HZ |
231 | init_packet->msg.v1_msg. |
232 | send_recv_buf_complete.status); | |
927bc33c | 233 | ret = -EINVAL; |
0c3b7b2f | 234 | goto cleanup; |
fceaf24a HJ |
235 | } |
236 | ||
454f18a9 | 237 | /* Parse the response */ |
fceaf24a | 238 | |
53d21fdb HZ |
239 | net_device->recv_section_cnt = init_packet->msg. |
240 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 241 | |
53d21fdb | 242 | net_device->recv_section = kmalloc(net_device->recv_section_cnt |
85799a37 | 243 | * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
53d21fdb | 244 | if (net_device->recv_section == NULL) { |
927bc33c | 245 | ret = -EINVAL; |
0c3b7b2f | 246 | goto cleanup; |
fceaf24a HJ |
247 | } |
248 | ||
53d21fdb HZ |
249 | memcpy(net_device->recv_section, |
250 | init_packet->msg.v1_msg. | |
251 | send_recv_buf_complete.sections, | |
252 | net_device->recv_section_cnt * | |
85799a37 | 253 | sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 254 | |
21a80820 GKH |
255 | /* |
256 | * For 1st release, there should only be 1 section that represents the | |
257 | * entire receive buffer | |
258 | */ | |
53d21fdb HZ |
259 | if (net_device->recv_section_cnt != 1 || |
260 | net_device->recv_section->offset != 0) { | |
927bc33c | 261 | ret = -EINVAL; |
0c3b7b2f | 262 | goto cleanup; |
fceaf24a HJ |
263 | } |
264 | ||
0c3b7b2f | 265 | goto exit; |
fceaf24a | 266 | |
0c3b7b2f | 267 | cleanup: |
5a71ae30 | 268 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 269 | |
0c3b7b2f | 270 | exit: |
5a71ae30 | 271 | put_net_device(device); |
fceaf24a HJ |
272 | return ret; |
273 | } | |
274 | ||
fceaf24a | 275 | |
5a71ae30 | 276 | static int netvsc_connect_vsp(struct hv_device *device) |
fceaf24a | 277 | { |
35abb21a | 278 | int ret, t; |
85799a37 HZ |
279 | struct netvsc_device *net_device; |
280 | struct nvsp_message *init_packet; | |
281 | int ndis_version; | |
fceaf24a | 282 | |
5a71ae30 | 283 | net_device = get_outbound_net_device(device); |
85799a37 | 284 | if (!net_device) { |
eb335bc4 | 285 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 286 | "device being destroyed?"); |
0f48c72c | 287 | return -ENODEV; |
fceaf24a HJ |
288 | } |
289 | ||
53d21fdb | 290 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 291 | |
85799a37 | 292 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
293 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
294 | init_packet->msg.init_msg.init.min_protocol_ver = | |
85799a37 | 295 | NVSP_MIN_PROTOCOL_VERSION; |
53d21fdb | 296 | init_packet->msg.init_msg.init.max_protocol_ver = |
85799a37 | 297 | NVSP_MAX_PROTOCOL_VERSION; |
fceaf24a | 298 | |
454f18a9 | 299 | /* Send the init request */ |
85799a37 | 300 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 301 | sizeof(struct nvsp_message), |
85799a37 | 302 | (unsigned long)init_packet, |
415f2287 | 303 | VM_PKT_DATA_INBAND, |
5a4df290 | 304 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 305 | |
b8a3d52b | 306 | if (ret != 0) |
0c3b7b2f | 307 | goto cleanup; |
fceaf24a | 308 | |
5c5781b3 | 309 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a S |
310 | |
311 | if (t == 0) { | |
0c3b7b2f S |
312 | ret = -ETIMEDOUT; |
313 | goto cleanup; | |
314 | } | |
fceaf24a | 315 | |
53d21fdb HZ |
316 | if (init_packet->msg.init_msg.init_complete.status != |
317 | NVSP_STAT_SUCCESS) { | |
0f48c72c | 318 | ret = -EINVAL; |
0c3b7b2f | 319 | goto cleanup; |
fceaf24a HJ |
320 | } |
321 | ||
53d21fdb HZ |
322 | if (init_packet->msg.init_msg.init_complete. |
323 | negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { | |
0f48c72c | 324 | ret = -EPROTO; |
0c3b7b2f | 325 | goto cleanup; |
fceaf24a | 326 | } |
454f18a9 | 327 | /* Send the ndis version */ |
85799a37 | 328 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 329 | |
85799a37 | 330 | ndis_version = 0x00050000; |
fceaf24a | 331 | |
53d21fdb HZ |
332 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
333 | init_packet->msg.v1_msg. | |
334 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 335 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
336 | init_packet->msg.v1_msg. |
337 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 338 | ndis_version & 0xFFFF; |
fceaf24a | 339 | |
454f18a9 | 340 | /* Send the init request */ |
85799a37 | 341 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
342 | sizeof(struct nvsp_message), |
343 | (unsigned long)init_packet, | |
344 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 345 | if (ret != 0) |
0c3b7b2f | 346 | goto cleanup; |
454f18a9 BP |
347 | |
348 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 349 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 350 | |
0c3b7b2f | 351 | cleanup: |
5a71ae30 | 352 | put_net_device(device); |
fceaf24a HJ |
353 | return ret; |
354 | } | |
355 | ||
648dc598 | 356 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 357 | { |
5a71ae30 | 358 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
359 | } |
360 | ||
3e189519 | 361 | /* |
5a71ae30 | 362 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 363 | */ |
905620d1 | 364 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 365 | { |
85799a37 HZ |
366 | struct netvsc_device *net_device; |
367 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
c38b9c71 | 368 | unsigned long flags; |
fceaf24a | 369 | |
3852409b S |
370 | net_device = (struct netvsc_device *)device->ext; |
371 | atomic_dec(&net_device->refcnt); | |
c38b9c71 S |
372 | spin_lock_irqsave(&device->channel->inbound_lock, flags); |
373 | net_device->destroy = true; | |
374 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); | |
375 | ||
454f18a9 | 376 | /* Wait for all send completions */ |
53d21fdb | 377 | while (atomic_read(&net_device->num_outstanding_sends)) { |
eb335bc4 HJ |
378 | dev_err(&device->device, |
379 | "waiting for %d requests to complete...", | |
380 | atomic_read(&net_device->num_outstanding_sends)); | |
b4362c9c | 381 | udelay(100); |
fceaf24a HJ |
382 | } |
383 | ||
648dc598 | 384 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 385 | |
124f506d S |
386 | atomic_dec(&net_device->refcnt); |
387 | device->ext = NULL; | |
3852409b S |
388 | /* |
389 | * Wait until the ref cnt falls to 0. | |
390 | * We have already stopped any new references | |
391 | * for outgoing traffic. Also, at this point we don't have any | |
392 | * incoming traffic as well. So this must be outgoing refrences | |
393 | * established prior to marking the device as being destroyed. | |
394 | * Since the send path is non-blocking, it is reasonable to busy | |
395 | * wait here. | |
396 | */ | |
397 | while (atomic_read(&net_device->refcnt)) | |
398 | udelay(100); | |
399 | ||
454f18a9 | 400 | /* At this point, no one should be accessing netDevice except in here */ |
eb335bc4 | 401 | dev_notice(&device->device, "net device safe to remove"); |
fceaf24a | 402 | |
454f18a9 | 403 | /* Now, we can close the channel safely */ |
85799a37 | 404 | vmbus_close(device->channel); |
fceaf24a | 405 | |
454f18a9 | 406 | /* Release all resources */ |
85799a37 | 407 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 408 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 409 | list_del(&netvsc_packet->list_ent); |
85799a37 | 410 | kfree(netvsc_packet); |
fceaf24a HJ |
411 | } |
412 | ||
356c4657 | 413 | kfree(net_device); |
21a80820 | 414 | return 0; |
fceaf24a HJ |
415 | } |
416 | ||
5a71ae30 | 417 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 418 | struct vmpacket_descriptor *packet) |
fceaf24a | 419 | { |
85799a37 HZ |
420 | struct netvsc_device *net_device; |
421 | struct nvsp_message *nvsp_packet; | |
422 | struct hv_netvsc_packet *nvsc_packet; | |
fceaf24a | 423 | |
5a71ae30 | 424 | net_device = get_inbound_net_device(device); |
85799a37 | 425 | if (!net_device) { |
eb335bc4 | 426 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 427 | "device being destroyed?"); |
fceaf24a HJ |
428 | return; |
429 | } | |
430 | ||
85799a37 | 431 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 432 | (packet->offset8 << 3)); |
fceaf24a | 433 | |
53d21fdb HZ |
434 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
435 | (nvsp_packet->hdr.msg_type == | |
436 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
437 | (nvsp_packet->hdr.msg_type == | |
438 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 439 | /* Copy the response back */ |
53d21fdb | 440 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 441 | sizeof(struct nvsp_message)); |
35abb21a | 442 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
443 | } else if (nvsp_packet->hdr.msg_type == |
444 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
454f18a9 | 445 | /* Get the send context */ |
85799a37 | 446 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 447 | packet->trans_id; |
fceaf24a | 448 | |
454f18a9 | 449 | /* Notify the layer above us */ |
72a2f5bd HZ |
450 | nvsc_packet->completion.send.send_completion( |
451 | nvsc_packet->completion.send.send_completion_ctx); | |
fceaf24a | 452 | |
53d21fdb | 453 | atomic_dec(&net_device->num_outstanding_sends); |
21a80820 | 454 | } else { |
eb335bc4 | 455 | dev_err(&device->device, "Unknown send completion packet type- " |
53d21fdb | 456 | "%d received!!", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
457 | } |
458 | ||
5a71ae30 | 459 | put_net_device(device); |
fceaf24a HJ |
460 | } |
461 | ||
f9819f05 | 462 | int netvsc_send(struct hv_device *device, |
85799a37 | 463 | struct hv_netvsc_packet *packet) |
fceaf24a | 464 | { |
85799a37 | 465 | struct netvsc_device *net_device; |
21a80820 | 466 | int ret = 0; |
fceaf24a | 467 | |
223c1aa6 | 468 | struct nvsp_message sendMessage; |
fceaf24a | 469 | |
5a71ae30 | 470 | net_device = get_outbound_net_device(device); |
85799a37 | 471 | if (!net_device) { |
eb335bc4 | 472 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 473 | "ignoring outbound packets", net_device); |
ff2bd69a | 474 | return -ENODEV; |
fceaf24a HJ |
475 | } |
476 | ||
53d21fdb | 477 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 478 | if (packet->is_data_pkt) { |
21a80820 | 479 | /* 0 is RMC_DATA; */ |
53d21fdb | 480 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
481 | } else { |
482 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 483 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 484 | } |
fceaf24a | 485 | |
454f18a9 | 486 | /* Not using send buffer section */ |
53d21fdb HZ |
487 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
488 | 0xFFFFFFFF; | |
489 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 490 | |
72a2f5bd | 491 | if (packet->page_buf_cnt) { |
85799a37 | 492 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
493 | packet->page_buf, |
494 | packet->page_buf_cnt, | |
ff3f8eec GKH |
495 | &sendMessage, |
496 | sizeof(struct nvsp_message), | |
85799a37 | 497 | (unsigned long)packet); |
21a80820 | 498 | } else { |
85799a37 | 499 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
e4d59ac5 HZ |
500 | sizeof(struct nvsp_message), |
501 | (unsigned long)packet, | |
502 | VM_PKT_DATA_INBAND, | |
503 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
504 | |
505 | } | |
506 | ||
507 | if (ret != 0) | |
eb335bc4 | 508 | dev_err(&device->device, "Unable to send packet %p ret %d", |
85799a37 | 509 | packet, ret); |
fceaf24a | 510 | |
53d21fdb | 511 | atomic_inc(&net_device->num_outstanding_sends); |
5a71ae30 | 512 | put_net_device(device); |
fceaf24a HJ |
513 | return ret; |
514 | } | |
515 | ||
5fa9d3c5 HZ |
516 | static void netvsc_send_recv_completion(struct hv_device *device, |
517 | u64 transaction_id) | |
518 | { | |
519 | struct nvsp_message recvcompMessage; | |
520 | int retries = 0; | |
521 | int ret; | |
522 | ||
523 | recvcompMessage.hdr.msg_type = | |
524 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
525 | ||
526 | /* FIXME: Pass in the status */ | |
527 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = | |
528 | NVSP_STAT_SUCCESS; | |
529 | ||
530 | retry_send_cmplt: | |
531 | /* Send the completion */ | |
532 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, | |
533 | sizeof(struct nvsp_message), transaction_id, | |
534 | VM_PKT_COMP, 0); | |
535 | if (ret == 0) { | |
536 | /* success */ | |
537 | /* no-op */ | |
d2598f01 | 538 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
539 | /* no more room...wait a bit and attempt to retry 3 times */ |
540 | retries++; | |
541 | dev_err(&device->device, "unable to send receive completion pkt" | |
542 | " (tid %llx)...retrying %d", transaction_id, retries); | |
543 | ||
544 | if (retries < 4) { | |
545 | udelay(100); | |
546 | goto retry_send_cmplt; | |
547 | } else { | |
548 | dev_err(&device->device, "unable to send receive " | |
549 | "completion pkt (tid %llx)...give up retrying", | |
550 | transaction_id); | |
551 | } | |
552 | } else { | |
553 | dev_err(&device->device, "unable to send receive " | |
554 | "completion pkt - %llx", transaction_id); | |
555 | } | |
556 | } | |
557 | ||
57991156 HZ |
558 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
559 | static void netvsc_receive_completion(void *context) | |
560 | { | |
561 | struct hv_netvsc_packet *packet = context; | |
562 | struct hv_device *device = (struct hv_device *)packet->device; | |
563 | struct netvsc_device *net_device; | |
564 | u64 transaction_id = 0; | |
565 | bool fsend_receive_comp = false; | |
566 | unsigned long flags; | |
567 | ||
568 | /* | |
569 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
570 | * send out receive completion, we are using GetInboundNetDevice() | |
571 | * since we may have disable outbound traffic already. | |
572 | */ | |
573 | net_device = get_inbound_net_device(device); | |
574 | if (!net_device) { | |
575 | dev_err(&device->device, "unable to get net device..." | |
576 | "device being destroyed?"); | |
577 | return; | |
578 | } | |
579 | ||
580 | /* Overloading use of the lock. */ | |
581 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
582 | ||
583 | packet->xfer_page_pkt->count--; | |
584 | ||
585 | /* | |
586 | * Last one in the line that represent 1 xfer page packet. | |
587 | * Return the xfer page packet itself to the freelist | |
588 | */ | |
589 | if (packet->xfer_page_pkt->count == 0) { | |
590 | fsend_receive_comp = true; | |
591 | transaction_id = packet->completion.recv.recv_completion_tid; | |
592 | list_add_tail(&packet->xfer_page_pkt->list_ent, | |
593 | &net_device->recv_pkt_list); | |
594 | ||
595 | } | |
596 | ||
597 | /* Put the packet back */ | |
598 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
599 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
600 | ||
601 | /* Send a receive completion for the xfer page packet */ | |
602 | if (fsend_receive_comp) | |
603 | netvsc_send_recv_completion(device, transaction_id); | |
604 | ||
605 | put_net_device(device); | |
606 | } | |
607 | ||
5a71ae30 | 608 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 609 | struct vmpacket_descriptor *packet) |
fceaf24a | 610 | { |
85799a37 HZ |
611 | struct netvsc_device *net_device; |
612 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
613 | struct nvsp_message *nvsp_packet; | |
614 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
c4b0bc94 | 615 | unsigned long start; |
85799a37 | 616 | unsigned long end, end_virtual; |
7e23a6e9 | 617 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 618 | struct xferpage_packet *xferpage_packet = NULL; |
21a80820 | 619 | int i, j; |
85799a37 | 620 | int count = 0, bytes_remain = 0; |
6436873a | 621 | unsigned long flags; |
779b4d17 | 622 | |
d29274ef | 623 | LIST_HEAD(listHead); |
fceaf24a | 624 | |
5a71ae30 | 625 | net_device = get_inbound_net_device(device); |
85799a37 | 626 | if (!net_device) { |
eb335bc4 | 627 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 628 | "device being destroyed?"); |
fceaf24a HJ |
629 | return; |
630 | } | |
631 | ||
21a80820 GKH |
632 | /* |
633 | * All inbound packets other than send completion should be xfer page | |
634 | * packet | |
635 | */ | |
415f2287 | 636 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
eb335bc4 | 637 | dev_err(&device->device, "Unknown packet type received - %d", |
415f2287 | 638 | packet->type); |
5a71ae30 | 639 | put_net_device(device); |
fceaf24a HJ |
640 | return; |
641 | } | |
642 | ||
85799a37 | 643 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 644 | (packet->offset8 << 3)); |
fceaf24a | 645 | |
454f18a9 | 646 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
647 | if (nvsp_packet->hdr.msg_type != |
648 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
eb335bc4 HJ |
649 | dev_err(&device->device, "Unknown nvsp packet type received-" |
650 | " %d", nvsp_packet->hdr.msg_type); | |
5a71ae30 | 651 | put_net_device(device); |
fceaf24a HJ |
652 | return; |
653 | } | |
654 | ||
85799a37 | 655 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 656 | |
415f2287 | 657 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
eb335bc4 | 658 | dev_err(&device->device, "Invalid xfer page set id - " |
21a80820 | 659 | "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 660 | vmxferpage_packet->xfer_pageset_id); |
5a71ae30 | 661 | put_net_device(device); |
fceaf24a HJ |
662 | return; |
663 | } | |
664 | ||
454f18a9 BP |
665 | /* |
666 | * Grab free packets (range count + 1) to represent this xfer | |
667 | * page packet. +1 to represent the xfer page packet itself. | |
668 | * We grab it here so that we know exactly how many we can | |
669 | * fulfil | |
670 | */ | |
53d21fdb HZ |
671 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
672 | while (!list_empty(&net_device->recv_pkt_list)) { | |
673 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 674 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
675 | break; |
676 | } | |
53d21fdb | 677 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 678 | |
454f18a9 BP |
679 | /* |
680 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
681 | * page and at least 1 for the range) i.e. we can handled | |
682 | * some of the xfer page packet ranges... | |
683 | */ | |
21a80820 | 684 | if (count < 2) { |
eb335bc4 HJ |
685 | dev_err(&device->device, "Got only %d netvsc pkt...needed " |
686 | "%d pkts. Dropping this xfer page packet completely!", | |
687 | count, vmxferpage_packet->range_cnt + 1); | |
fceaf24a | 688 | |
454f18a9 | 689 | /* Return it to the freelist */ |
53d21fdb | 690 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 691 | for (i = count; i != 0; i--) { |
92ec0893 | 692 | list_move_tail(listHead.next, |
53d21fdb | 693 | &net_device->recv_pkt_list); |
fceaf24a | 694 | } |
53d21fdb | 695 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 696 | flags); |
fceaf24a | 697 | |
5a71ae30 | 698 | netvsc_send_recv_completion(device, |
415f2287 | 699 | vmxferpage_packet->d.trans_id); |
fceaf24a | 700 | |
5a71ae30 | 701 | put_net_device(device); |
fceaf24a HJ |
702 | return; |
703 | } | |
704 | ||
454f18a9 | 705 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 706 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 707 | list_del(&xferpage_packet->list_ent); |
d29274ef | 708 | |
21a80820 | 709 | /* This is how much we can satisfy */ |
72a2f5bd | 710 | xferpage_packet->count = count - 1; |
21a80820 | 711 | |
415f2287 | 712 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
eb335bc4 HJ |
713 | dev_err(&device->device, "Needed %d netvsc pkts to satisy " |
714 | "this xfer page...got %d", | |
715 | vmxferpage_packet->range_cnt, xferpage_packet->count); | |
fceaf24a HJ |
716 | } |
717 | ||
454f18a9 | 718 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 719 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 720 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 721 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 722 | |
454f18a9 | 723 | /* Initialize the netvsc packet */ |
72a2f5bd HZ |
724 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
725 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 726 | netvsc_receive_completion; |
72a2f5bd | 727 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 728 | netvsc_packet; |
72a2f5bd | 729 | netvsc_packet->device = device; |
21a80820 | 730 | /* Save this so that we can send it back */ |
72a2f5bd | 731 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 732 | vmxferpage_packet->d.trans_id; |
fceaf24a | 733 | |
72a2f5bd | 734 | netvsc_packet->total_data_buflen = |
415f2287 | 735 | vmxferpage_packet->ranges[i].byte_count; |
72a2f5bd | 736 | netvsc_packet->page_buf_cnt = 1; |
fceaf24a | 737 | |
ca623ad3 | 738 | netvsc_packet->page_buf[0].len = |
415f2287 | 739 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 740 | |
85799a37 | 741 | start = virt_to_phys((void *)((unsigned long)net_device-> |
415f2287 | 742 | recv_buf + vmxferpage_packet->ranges[i].byte_offset)); |
fceaf24a | 743 | |
ca623ad3 | 744 | netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT; |
53d21fdb | 745 | end_virtual = (unsigned long)net_device->recv_buf |
415f2287 HZ |
746 | + vmxferpage_packet->ranges[i].byte_offset |
747 | + vmxferpage_packet->ranges[i].byte_count - 1; | |
85799a37 | 748 | end = virt_to_phys((void *)end_virtual); |
fceaf24a | 749 | |
454f18a9 | 750 | /* Calculate the page relative offset */ |
ca623ad3 | 751 | netvsc_packet->page_buf[0].offset = |
415f2287 | 752 | vmxferpage_packet->ranges[i].byte_offset & |
85799a37 | 753 | (PAGE_SIZE - 1); |
21a80820 GKH |
754 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { |
755 | /* Handle frame across multiple pages: */ | |
ca623ad3 HZ |
756 | netvsc_packet->page_buf[0].len = |
757 | (netvsc_packet->page_buf[0].pfn << | |
85799a37 | 758 | PAGE_SHIFT) |
21a80820 | 759 | + PAGE_SIZE - start; |
72a2f5bd | 760 | bytes_remain = netvsc_packet->total_data_buflen - |
ca623ad3 | 761 | netvsc_packet->page_buf[0].len; |
21a80820 | 762 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { |
ca623ad3 | 763 | netvsc_packet->page_buf[j].offset = 0; |
85799a37 | 764 | if (bytes_remain <= PAGE_SIZE) { |
ca623ad3 | 765 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
766 | bytes_remain; |
767 | bytes_remain = 0; | |
21a80820 | 768 | } else { |
ca623ad3 | 769 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
770 | PAGE_SIZE; |
771 | bytes_remain -= PAGE_SIZE; | |
21a80820 | 772 | } |
ca623ad3 | 773 | netvsc_packet->page_buf[j].pfn = |
85799a37 HZ |
774 | virt_to_phys((void *)(end_virtual - |
775 | bytes_remain)) >> PAGE_SHIFT; | |
72a2f5bd | 776 | netvsc_packet->page_buf_cnt++; |
85799a37 | 777 | if (bytes_remain == 0) |
21a80820 | 778 | break; |
fceaf24a | 779 | } |
fceaf24a | 780 | } |
fceaf24a | 781 | |
454f18a9 | 782 | /* Pass it to the upper layer */ |
ac6f7859 | 783 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 784 | |
5a71ae30 | 785 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 786 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
787 | } |
788 | ||
5a71ae30 | 789 | put_net_device(device); |
fceaf24a HJ |
790 | } |
791 | ||
5a71ae30 | 792 | static void netvsc_channel_cb(void *context) |
fceaf24a | 793 | { |
21a80820 | 794 | int ret; |
85799a37 HZ |
795 | struct hv_device *device = context; |
796 | struct netvsc_device *net_device; | |
797 | u32 bytes_recvd; | |
798 | u64 request_id; | |
c6fcf0ba | 799 | unsigned char *packet; |
8dc0a06a | 800 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
801 | unsigned char *buffer; |
802 | int bufferlen = NETVSC_PACKET_SIZE; | |
fceaf24a | 803 | |
c6fcf0ba | 804 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 805 | GFP_ATOMIC); |
c6fcf0ba BP |
806 | if (!packet) |
807 | return; | |
808 | buffer = packet; | |
809 | ||
5a71ae30 | 810 | net_device = get_inbound_net_device(device); |
85799a37 | 811 | if (!net_device) { |
eb335bc4 | 812 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 813 | "ignoring inbound packets", net_device); |
c6fcf0ba | 814 | goto out; |
fceaf24a HJ |
815 | } |
816 | ||
21a80820 | 817 | do { |
9f630068 | 818 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 819 | &bytes_recvd, &request_id); |
21a80820 | 820 | if (ret == 0) { |
85799a37 | 821 | if (bytes_recvd > 0) { |
21a80820 | 822 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
823 | switch (desc->type) { |
824 | case VM_PKT_COMP: | |
5a71ae30 | 825 | netvsc_send_completion(device, desc); |
21a80820 GKH |
826 | break; |
827 | ||
415f2287 | 828 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 829 | netvsc_receive(device, desc); |
21a80820 GKH |
830 | break; |
831 | ||
832 | default: | |
eb335bc4 | 833 | dev_err(&device->device, |
21a80820 GKH |
834 | "unhandled packet type %d, " |
835 | "tid %llx len %d\n", | |
415f2287 | 836 | desc->type, request_id, |
85799a37 | 837 | bytes_recvd); |
21a80820 | 838 | break; |
fceaf24a HJ |
839 | } |
840 | ||
454f18a9 | 841 | /* reset */ |
c6fcf0ba | 842 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 843 | kfree(buffer); |
fceaf24a | 844 | buffer = packet; |
c6fcf0ba | 845 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a | 846 | } |
21a80820 | 847 | } else { |
454f18a9 | 848 | /* reset */ |
c6fcf0ba | 849 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 850 | kfree(buffer); |
fceaf24a | 851 | buffer = packet; |
c6fcf0ba | 852 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
853 | } |
854 | ||
855 | break; | |
856 | } | |
3d5cad97 | 857 | } else if (ret == -ENOBUFS) { |
21a80820 | 858 | /* Handle large packet */ |
85799a37 | 859 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 860 | if (buffer == NULL) { |
454f18a9 | 861 | /* Try again next time around */ |
eb335bc4 | 862 | dev_err(&device->device, |
21a80820 | 863 | "unable to allocate buffer of size " |
85799a37 | 864 | "(%d)!!", bytes_recvd); |
fceaf24a HJ |
865 | break; |
866 | } | |
867 | ||
85799a37 | 868 | bufferlen = bytes_recvd; |
fceaf24a HJ |
869 | } |
870 | } while (1); | |
871 | ||
5a71ae30 | 872 | put_net_device(device); |
c6fcf0ba BP |
873 | out: |
874 | kfree(buffer); | |
fceaf24a HJ |
875 | return; |
876 | } | |
af24ce42 | 877 | |
b637e023 HZ |
878 | /* |
879 | * netvsc_device_add - Callback when the device belonging to this | |
880 | * driver is added | |
881 | */ | |
7bd23a4d | 882 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
883 | { |
884 | int ret = 0; | |
885 | int i; | |
aae23986 S |
886 | int ring_size = |
887 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
888 | struct netvsc_device *net_device; |
889 | struct hv_netvsc_packet *packet, *pos; | |
b637e023 HZ |
890 | |
891 | net_device = alloc_net_device(device); | |
892 | if (!net_device) { | |
ace163a8 | 893 | ret = -ENOMEM; |
b637e023 HZ |
894 | goto cleanup; |
895 | } | |
896 | ||
897 | /* Initialize the NetVSC channel extension */ | |
898 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
899 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
900 | ||
b637e023 HZ |
901 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
902 | ||
903 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
904 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
905 | (NETVSC_RECEIVE_SG_COUNT * | |
906 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
907 | if (!packet) | |
908 | break; | |
909 | ||
910 | list_add_tail(&packet->list_ent, | |
911 | &net_device->recv_pkt_list); | |
912 | } | |
35abb21a | 913 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
914 | |
915 | /* Open the channel */ | |
aae23986 S |
916 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
917 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
918 | netvsc_channel_cb, device); |
919 | ||
920 | if (ret != 0) { | |
921 | dev_err(&device->device, "unable to open channel: %d", ret); | |
b637e023 HZ |
922 | goto cleanup; |
923 | } | |
924 | ||
925 | /* Channel is opened */ | |
926 | pr_info("hv_netvsc channel opened successfully"); | |
927 | ||
928 | /* Connect with the NetVsp */ | |
929 | ret = netvsc_connect_vsp(device); | |
930 | if (ret != 0) { | |
931 | dev_err(&device->device, | |
932 | "unable to connect to NetVSP - %d", ret); | |
b637e023 HZ |
933 | goto close; |
934 | } | |
935 | ||
936 | return ret; | |
937 | ||
938 | close: | |
939 | /* Now, we can close the channel safely */ | |
940 | vmbus_close(device->channel); | |
941 | ||
942 | cleanup: | |
943 | ||
944 | if (net_device) { | |
945 | list_for_each_entry_safe(packet, pos, | |
946 | &net_device->recv_pkt_list, | |
947 | list_ent) { | |
948 | list_del(&packet->list_ent); | |
949 | kfree(packet); | |
950 | } | |
951 | ||
356c4657 | 952 | kfree(net_device); |
b637e023 HZ |
953 | } |
954 | ||
955 | return ret; | |
956 | } |