Commit | Line | Data |
---|---|---|
fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
d0e94d17 | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 19 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 20 | */ |
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> |
d9871158 | 30 | #include <linux/netdevice.h> |
3f335ea2 | 31 | |
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; |
2ddd5e5f | 38 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 39 | |
85799a37 HZ |
40 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
41 | if (!net_device) | |
fceaf24a HJ |
42 | return NULL; |
43 | ||
fceaf24a | 44 | |
c38b9c71 | 45 | net_device->destroy = false; |
53d21fdb | 46 | net_device->dev = device; |
2ddd5e5f | 47 | net_device->ndev = ndev; |
fceaf24a | 48 | |
2ddd5e5f | 49 | hv_set_drvdata(device, net_device); |
85799a37 | 50 | return net_device; |
fceaf24a HJ |
51 | } |
52 | ||
5a71ae30 | 53 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 54 | { |
85799a37 | 55 | struct netvsc_device *net_device; |
fceaf24a | 56 | |
2ddd5e5f | 57 | net_device = hv_get_drvdata(device); |
9d88f33a | 58 | if (net_device && net_device->destroy) |
85799a37 | 59 | net_device = NULL; |
fceaf24a | 60 | |
85799a37 | 61 | return net_device; |
fceaf24a HJ |
62 | } |
63 | ||
5a71ae30 | 64 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 65 | { |
85799a37 | 66 | struct netvsc_device *net_device; |
fceaf24a | 67 | |
2ddd5e5f | 68 | net_device = hv_get_drvdata(device); |
9d88f33a S |
69 | |
70 | if (!net_device) | |
71 | goto get_in_err; | |
72 | ||
73 | if (net_device->destroy && | |
74 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 75 | net_device = NULL; |
fceaf24a | 76 | |
9d88f33a | 77 | get_in_err: |
85799a37 | 78 | return net_device; |
fceaf24a HJ |
79 | } |
80 | ||
fceaf24a | 81 | |
ec91cd09 HZ |
82 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
83 | { | |
84 | struct nvsp_message *revoke_packet; | |
85 | int ret = 0; | |
2ddd5e5f | 86 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
87 | |
88 | /* | |
89 | * If we got a section count, it means we received a | |
90 | * SendReceiveBufferComplete msg (ie sent | |
91 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
92 | * to send a revoke msg here | |
93 | */ | |
94 | if (net_device->recv_section_cnt) { | |
95 | /* Send the revoke receive buffer */ | |
96 | revoke_packet = &net_device->revoke_packet; | |
97 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
98 | ||
99 | revoke_packet->hdr.msg_type = | |
100 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
101 | revoke_packet->msg.v1_msg. | |
102 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
103 | ||
104 | ret = vmbus_sendpacket(net_device->dev->channel, | |
105 | revoke_packet, | |
106 | sizeof(struct nvsp_message), | |
107 | (unsigned long)revoke_packet, | |
108 | VM_PKT_DATA_INBAND, 0); | |
109 | /* | |
110 | * If we failed here, we might as well return and | |
111 | * have a leak rather than continue and a bugchk | |
112 | */ | |
113 | if (ret != 0) { | |
d9871158 | 114 | netdev_err(ndev, "unable to send " |
c909ebbd | 115 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 116 | return ret; |
ec91cd09 HZ |
117 | } |
118 | } | |
119 | ||
120 | /* Teardown the gpadl on the vsp end */ | |
121 | if (net_device->recv_buf_gpadl_handle) { | |
122 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
123 | net_device->recv_buf_gpadl_handle); | |
124 | ||
125 | /* If we failed here, we might as well return and have a leak | |
126 | * rather than continue and a bugchk | |
127 | */ | |
128 | if (ret != 0) { | |
d9871158 | 129 | netdev_err(ndev, |
c909ebbd | 130 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 131 | return ret; |
ec91cd09 HZ |
132 | } |
133 | net_device->recv_buf_gpadl_handle = 0; | |
134 | } | |
135 | ||
136 | if (net_device->recv_buf) { | |
137 | /* Free up the receive buffer */ | |
138 | free_pages((unsigned long)net_device->recv_buf, | |
139 | get_order(net_device->recv_buf_size)); | |
140 | net_device->recv_buf = NULL; | |
141 | } | |
142 | ||
143 | if (net_device->recv_section) { | |
144 | net_device->recv_section_cnt = 0; | |
145 | kfree(net_device->recv_section); | |
146 | net_device->recv_section = NULL; | |
147 | } | |
148 | ||
149 | return ret; | |
150 | } | |
151 | ||
5a71ae30 | 152 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 153 | { |
21a80820 | 154 | int ret = 0; |
35abb21a | 155 | int t; |
85799a37 HZ |
156 | struct netvsc_device *net_device; |
157 | struct nvsp_message *init_packet; | |
2ddd5e5f | 158 | struct net_device *ndev; |
fceaf24a | 159 | |
5a71ae30 | 160 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 161 | if (!net_device) |
927bc33c | 162 | return -ENODEV; |
2ddd5e5f | 163 | ndev = net_device->ndev; |
fceaf24a | 164 | |
53d21fdb | 165 | net_device->recv_buf = |
df3493e0 S |
166 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
167 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 168 | if (!net_device->recv_buf) { |
d9871158 | 169 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 170 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 171 | ret = -ENOMEM; |
0c3b7b2f | 172 | goto cleanup; |
fceaf24a | 173 | } |
fceaf24a | 174 | |
454f18a9 BP |
175 | /* |
176 | * Establish the gpadl handle for this buffer on this | |
177 | * channel. Note: This call uses the vmbus connection rather | |
178 | * than the channel to establish the gpadl handle. | |
179 | */ | |
53d21fdb HZ |
180 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
181 | net_device->recv_buf_size, | |
182 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 183 | if (ret != 0) { |
d9871158 | 184 | netdev_err(ndev, |
c909ebbd | 185 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 186 | goto cleanup; |
fceaf24a HJ |
187 | } |
188 | ||
fceaf24a | 189 | |
454f18a9 | 190 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 191 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 192 | |
85799a37 | 193 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 194 | |
53d21fdb HZ |
195 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
196 | init_packet->msg.v1_msg.send_recv_buf. | |
197 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
198 | init_packet->msg.v1_msg. | |
199 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 200 | |
454f18a9 | 201 | /* Send the gpadl notification request */ |
85799a37 | 202 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 203 | sizeof(struct nvsp_message), |
85799a37 | 204 | (unsigned long)init_packet, |
415f2287 | 205 | VM_PKT_DATA_INBAND, |
5a4df290 | 206 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 207 | if (ret != 0) { |
d9871158 | 208 | netdev_err(ndev, |
c909ebbd | 209 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 210 | goto cleanup; |
fceaf24a HJ |
211 | } |
212 | ||
5c5781b3 | 213 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 214 | BUG_ON(t == 0); |
0c3b7b2f | 215 | |
fceaf24a | 216 | |
454f18a9 | 217 | /* Check the response */ |
53d21fdb HZ |
218 | if (init_packet->msg.v1_msg. |
219 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 220 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 221 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
222 | init_packet->msg.v1_msg. |
223 | send_recv_buf_complete.status); | |
927bc33c | 224 | ret = -EINVAL; |
0c3b7b2f | 225 | goto cleanup; |
fceaf24a HJ |
226 | } |
227 | ||
454f18a9 | 228 | /* Parse the response */ |
fceaf24a | 229 | |
53d21fdb HZ |
230 | net_device->recv_section_cnt = init_packet->msg. |
231 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 232 | |
53d21fdb | 233 | net_device->recv_section = kmalloc(net_device->recv_section_cnt |
85799a37 | 234 | * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
53d21fdb | 235 | if (net_device->recv_section == NULL) { |
927bc33c | 236 | ret = -EINVAL; |
0c3b7b2f | 237 | goto cleanup; |
fceaf24a HJ |
238 | } |
239 | ||
53d21fdb HZ |
240 | memcpy(net_device->recv_section, |
241 | init_packet->msg.v1_msg. | |
242 | send_recv_buf_complete.sections, | |
243 | net_device->recv_section_cnt * | |
85799a37 | 244 | sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 245 | |
21a80820 GKH |
246 | /* |
247 | * For 1st release, there should only be 1 section that represents the | |
248 | * entire receive buffer | |
249 | */ | |
53d21fdb HZ |
250 | if (net_device->recv_section_cnt != 1 || |
251 | net_device->recv_section->offset != 0) { | |
927bc33c | 252 | ret = -EINVAL; |
0c3b7b2f | 253 | goto cleanup; |
fceaf24a HJ |
254 | } |
255 | ||
0c3b7b2f | 256 | goto exit; |
fceaf24a | 257 | |
0c3b7b2f | 258 | cleanup: |
5a71ae30 | 259 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 260 | |
0c3b7b2f | 261 | exit: |
fceaf24a HJ |
262 | return ret; |
263 | } | |
264 | ||
fceaf24a | 265 | |
5a71ae30 | 266 | static int netvsc_connect_vsp(struct hv_device *device) |
fceaf24a | 267 | { |
35abb21a | 268 | int ret, t; |
85799a37 HZ |
269 | struct netvsc_device *net_device; |
270 | struct nvsp_message *init_packet; | |
271 | int ndis_version; | |
2ddd5e5f | 272 | struct net_device *ndev; |
fceaf24a | 273 | |
5a71ae30 | 274 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 275 | if (!net_device) |
0f48c72c | 276 | return -ENODEV; |
2ddd5e5f | 277 | ndev = net_device->ndev; |
fceaf24a | 278 | |
53d21fdb | 279 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 280 | |
85799a37 | 281 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
282 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
283 | init_packet->msg.init_msg.init.min_protocol_ver = | |
85799a37 | 284 | NVSP_MIN_PROTOCOL_VERSION; |
53d21fdb | 285 | init_packet->msg.init_msg.init.max_protocol_ver = |
85799a37 | 286 | NVSP_MAX_PROTOCOL_VERSION; |
fceaf24a | 287 | |
454f18a9 | 288 | /* Send the init request */ |
85799a37 | 289 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 290 | sizeof(struct nvsp_message), |
85799a37 | 291 | (unsigned long)init_packet, |
415f2287 | 292 | VM_PKT_DATA_INBAND, |
5a4df290 | 293 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 294 | |
b8a3d52b | 295 | if (ret != 0) |
0c3b7b2f | 296 | goto cleanup; |
fceaf24a | 297 | |
5c5781b3 | 298 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a S |
299 | |
300 | if (t == 0) { | |
0c3b7b2f S |
301 | ret = -ETIMEDOUT; |
302 | goto cleanup; | |
303 | } | |
fceaf24a | 304 | |
53d21fdb HZ |
305 | if (init_packet->msg.init_msg.init_complete.status != |
306 | NVSP_STAT_SUCCESS) { | |
0f48c72c | 307 | ret = -EINVAL; |
0c3b7b2f | 308 | goto cleanup; |
fceaf24a HJ |
309 | } |
310 | ||
53d21fdb HZ |
311 | if (init_packet->msg.init_msg.init_complete. |
312 | negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { | |
0f48c72c | 313 | ret = -EPROTO; |
0c3b7b2f | 314 | goto cleanup; |
fceaf24a | 315 | } |
454f18a9 | 316 | /* Send the ndis version */ |
85799a37 | 317 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 318 | |
85799a37 | 319 | ndis_version = 0x00050000; |
fceaf24a | 320 | |
53d21fdb HZ |
321 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
322 | init_packet->msg.v1_msg. | |
323 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 324 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
325 | init_packet->msg.v1_msg. |
326 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 327 | ndis_version & 0xFFFF; |
fceaf24a | 328 | |
454f18a9 | 329 | /* Send the init request */ |
85799a37 | 330 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
331 | sizeof(struct nvsp_message), |
332 | (unsigned long)init_packet, | |
333 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 334 | if (ret != 0) |
0c3b7b2f | 335 | goto cleanup; |
454f18a9 BP |
336 | |
337 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 338 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 339 | |
0c3b7b2f | 340 | cleanup: |
fceaf24a HJ |
341 | return ret; |
342 | } | |
343 | ||
648dc598 | 344 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 345 | { |
5a71ae30 | 346 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
347 | } |
348 | ||
3e189519 | 349 | /* |
5a71ae30 | 350 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 351 | */ |
905620d1 | 352 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 353 | { |
85799a37 HZ |
354 | struct netvsc_device *net_device; |
355 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
c38b9c71 | 356 | unsigned long flags; |
fceaf24a | 357 | |
2ddd5e5f | 358 | net_device = hv_get_drvdata(device); |
c38b9c71 S |
359 | spin_lock_irqsave(&device->channel->inbound_lock, flags); |
360 | net_device->destroy = true; | |
361 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); | |
362 | ||
454f18a9 | 363 | /* Wait for all send completions */ |
53d21fdb | 364 | while (atomic_read(&net_device->num_outstanding_sends)) { |
d9871158 | 365 | dev_info(&device->device, |
c909ebbd | 366 | "waiting for %d requests to complete...\n", |
eb335bc4 | 367 | atomic_read(&net_device->num_outstanding_sends)); |
b4362c9c | 368 | udelay(100); |
fceaf24a HJ |
369 | } |
370 | ||
648dc598 | 371 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 372 | |
3852409b | 373 | /* |
9d88f33a S |
374 | * Since we have already drained, we don't need to busy wait |
375 | * as was done in final_release_stor_device() | |
376 | * Note that we cannot set the ext pointer to NULL until | |
377 | * we have drained - to drain the outgoing packets, we need to | |
378 | * allow incoming packets. | |
3852409b | 379 | */ |
9d88f33a S |
380 | |
381 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 382 | hv_set_drvdata(device, NULL); |
9d88f33a | 383 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 384 | |
454f18a9 | 385 | /* At this point, no one should be accessing netDevice except in here */ |
c909ebbd | 386 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 387 | |
454f18a9 | 388 | /* Now, we can close the channel safely */ |
85799a37 | 389 | vmbus_close(device->channel); |
fceaf24a | 390 | |
454f18a9 | 391 | /* Release all resources */ |
85799a37 | 392 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 393 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 394 | list_del(&netvsc_packet->list_ent); |
85799a37 | 395 | kfree(netvsc_packet); |
fceaf24a HJ |
396 | } |
397 | ||
356c4657 | 398 | kfree(net_device); |
21a80820 | 399 | return 0; |
fceaf24a HJ |
400 | } |
401 | ||
5a71ae30 | 402 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 403 | struct vmpacket_descriptor *packet) |
fceaf24a | 404 | { |
85799a37 HZ |
405 | struct netvsc_device *net_device; |
406 | struct nvsp_message *nvsp_packet; | |
407 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 408 | struct net_device *ndev; |
fceaf24a | 409 | |
5a71ae30 | 410 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 411 | if (!net_device) |
fceaf24a | 412 | return; |
2ddd5e5f | 413 | ndev = net_device->ndev; |
fceaf24a | 414 | |
85799a37 | 415 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 416 | (packet->offset8 << 3)); |
fceaf24a | 417 | |
53d21fdb HZ |
418 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
419 | (nvsp_packet->hdr.msg_type == | |
420 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
421 | (nvsp_packet->hdr.msg_type == | |
422 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 423 | /* Copy the response back */ |
53d21fdb | 424 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 425 | sizeof(struct nvsp_message)); |
35abb21a | 426 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
427 | } else if (nvsp_packet->hdr.msg_type == |
428 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
454f18a9 | 429 | /* Get the send context */ |
85799a37 | 430 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 431 | packet->trans_id; |
fceaf24a | 432 | |
454f18a9 | 433 | /* Notify the layer above us */ |
72a2f5bd HZ |
434 | nvsc_packet->completion.send.send_completion( |
435 | nvsc_packet->completion.send.send_completion_ctx); | |
fceaf24a | 436 | |
53d21fdb | 437 | atomic_dec(&net_device->num_outstanding_sends); |
21a80820 | 438 | } else { |
d9871158 | 439 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 440 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
441 | } |
442 | ||
fceaf24a HJ |
443 | } |
444 | ||
f9819f05 | 445 | int netvsc_send(struct hv_device *device, |
85799a37 | 446 | struct hv_netvsc_packet *packet) |
fceaf24a | 447 | { |
85799a37 | 448 | struct netvsc_device *net_device; |
21a80820 | 449 | int ret = 0; |
223c1aa6 | 450 | struct nvsp_message sendMessage; |
2ddd5e5f | 451 | struct net_device *ndev; |
fceaf24a | 452 | |
5a71ae30 | 453 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 454 | if (!net_device) |
ff2bd69a | 455 | return -ENODEV; |
2ddd5e5f | 456 | ndev = net_device->ndev; |
fceaf24a | 457 | |
53d21fdb | 458 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 459 | if (packet->is_data_pkt) { |
21a80820 | 460 | /* 0 is RMC_DATA; */ |
53d21fdb | 461 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
462 | } else { |
463 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 464 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 465 | } |
fceaf24a | 466 | |
454f18a9 | 467 | /* Not using send buffer section */ |
53d21fdb HZ |
468 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
469 | 0xFFFFFFFF; | |
470 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 471 | |
72a2f5bd | 472 | if (packet->page_buf_cnt) { |
85799a37 | 473 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
474 | packet->page_buf, |
475 | packet->page_buf_cnt, | |
ff3f8eec GKH |
476 | &sendMessage, |
477 | sizeof(struct nvsp_message), | |
85799a37 | 478 | (unsigned long)packet); |
21a80820 | 479 | } else { |
85799a37 | 480 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
e4d59ac5 HZ |
481 | sizeof(struct nvsp_message), |
482 | (unsigned long)packet, | |
483 | VM_PKT_DATA_INBAND, | |
484 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
485 | |
486 | } | |
487 | ||
488 | if (ret != 0) | |
d9871158 | 489 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 490 | packet, ret); |
7db1d946 HZ |
491 | else |
492 | atomic_inc(&net_device->num_outstanding_sends); | |
fceaf24a | 493 | |
fceaf24a HJ |
494 | return ret; |
495 | } | |
496 | ||
5fa9d3c5 HZ |
497 | static void netvsc_send_recv_completion(struct hv_device *device, |
498 | u64 transaction_id) | |
499 | { | |
500 | struct nvsp_message recvcompMessage; | |
501 | int retries = 0; | |
502 | int ret; | |
2ddd5e5f S |
503 | struct net_device *ndev; |
504 | struct netvsc_device *net_device = hv_get_drvdata(device); | |
505 | ||
506 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
507 | |
508 | recvcompMessage.hdr.msg_type = | |
509 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
510 | ||
511 | /* FIXME: Pass in the status */ | |
512 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = | |
513 | NVSP_STAT_SUCCESS; | |
514 | ||
515 | retry_send_cmplt: | |
516 | /* Send the completion */ | |
517 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, | |
518 | sizeof(struct nvsp_message), transaction_id, | |
519 | VM_PKT_COMP, 0); | |
520 | if (ret == 0) { | |
521 | /* success */ | |
522 | /* no-op */ | |
d2598f01 | 523 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
524 | /* no more room...wait a bit and attempt to retry 3 times */ |
525 | retries++; | |
d9871158 | 526 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 527 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
528 | |
529 | if (retries < 4) { | |
530 | udelay(100); | |
531 | goto retry_send_cmplt; | |
532 | } else { | |
d9871158 | 533 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 534 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
535 | transaction_id); |
536 | } | |
537 | } else { | |
d9871158 | 538 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 539 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
540 | } |
541 | } | |
542 | ||
57991156 HZ |
543 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
544 | static void netvsc_receive_completion(void *context) | |
545 | { | |
546 | struct hv_netvsc_packet *packet = context; | |
547 | struct hv_device *device = (struct hv_device *)packet->device; | |
548 | struct netvsc_device *net_device; | |
549 | u64 transaction_id = 0; | |
550 | bool fsend_receive_comp = false; | |
551 | unsigned long flags; | |
2ddd5e5f | 552 | struct net_device *ndev; |
57991156 HZ |
553 | |
554 | /* | |
555 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
556 | * send out receive completion, we are using GetInboundNetDevice() | |
557 | * since we may have disable outbound traffic already. | |
558 | */ | |
559 | net_device = get_inbound_net_device(device); | |
2ddd5e5f | 560 | if (!net_device) |
57991156 | 561 | return; |
2ddd5e5f | 562 | ndev = net_device->ndev; |
57991156 HZ |
563 | |
564 | /* Overloading use of the lock. */ | |
565 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
566 | ||
567 | packet->xfer_page_pkt->count--; | |
568 | ||
569 | /* | |
570 | * Last one in the line that represent 1 xfer page packet. | |
571 | * Return the xfer page packet itself to the freelist | |
572 | */ | |
573 | if (packet->xfer_page_pkt->count == 0) { | |
574 | fsend_receive_comp = true; | |
575 | transaction_id = packet->completion.recv.recv_completion_tid; | |
576 | list_add_tail(&packet->xfer_page_pkt->list_ent, | |
577 | &net_device->recv_pkt_list); | |
578 | ||
579 | } | |
580 | ||
581 | /* Put the packet back */ | |
582 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
583 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
584 | ||
585 | /* Send a receive completion for the xfer page packet */ | |
586 | if (fsend_receive_comp) | |
587 | netvsc_send_recv_completion(device, transaction_id); | |
588 | ||
57991156 HZ |
589 | } |
590 | ||
5a71ae30 | 591 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 592 | struct vmpacket_descriptor *packet) |
fceaf24a | 593 | { |
85799a37 HZ |
594 | struct netvsc_device *net_device; |
595 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
596 | struct nvsp_message *nvsp_packet; | |
597 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
c4b0bc94 | 598 | unsigned long start; |
85799a37 | 599 | unsigned long end, end_virtual; |
7e23a6e9 | 600 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 601 | struct xferpage_packet *xferpage_packet = NULL; |
21a80820 | 602 | int i, j; |
85799a37 | 603 | int count = 0, bytes_remain = 0; |
6436873a | 604 | unsigned long flags; |
2ddd5e5f | 605 | struct net_device *ndev; |
779b4d17 | 606 | |
d29274ef | 607 | LIST_HEAD(listHead); |
fceaf24a | 608 | |
5a71ae30 | 609 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 610 | if (!net_device) |
fceaf24a | 611 | return; |
2ddd5e5f | 612 | ndev = net_device->ndev; |
fceaf24a | 613 | |
21a80820 GKH |
614 | /* |
615 | * All inbound packets other than send completion should be xfer page | |
616 | * packet | |
617 | */ | |
415f2287 | 618 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 619 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 620 | packet->type); |
fceaf24a HJ |
621 | return; |
622 | } | |
623 | ||
85799a37 | 624 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 625 | (packet->offset8 << 3)); |
fceaf24a | 626 | |
454f18a9 | 627 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
628 | if (nvsp_packet->hdr.msg_type != |
629 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 630 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 631 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
632 | return; |
633 | } | |
634 | ||
85799a37 | 635 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 636 | |
415f2287 | 637 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 638 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 639 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 640 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
641 | return; |
642 | } | |
643 | ||
454f18a9 BP |
644 | /* |
645 | * Grab free packets (range count + 1) to represent this xfer | |
646 | * page packet. +1 to represent the xfer page packet itself. | |
647 | * We grab it here so that we know exactly how many we can | |
648 | * fulfil | |
649 | */ | |
53d21fdb HZ |
650 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
651 | while (!list_empty(&net_device->recv_pkt_list)) { | |
652 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 653 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
654 | break; |
655 | } | |
53d21fdb | 656 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 657 | |
454f18a9 BP |
658 | /* |
659 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
660 | * page and at least 1 for the range) i.e. we can handled | |
661 | * some of the xfer page packet ranges... | |
662 | */ | |
21a80820 | 663 | if (count < 2) { |
d9871158 | 664 | netdev_err(ndev, "Got only %d netvsc pkt...needed " |
c909ebbd | 665 | "%d pkts. Dropping this xfer page packet completely!\n", |
eb335bc4 | 666 | count, vmxferpage_packet->range_cnt + 1); |
fceaf24a | 667 | |
454f18a9 | 668 | /* Return it to the freelist */ |
53d21fdb | 669 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 670 | for (i = count; i != 0; i--) { |
92ec0893 | 671 | list_move_tail(listHead.next, |
53d21fdb | 672 | &net_device->recv_pkt_list); |
fceaf24a | 673 | } |
53d21fdb | 674 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 675 | flags); |
fceaf24a | 676 | |
5a71ae30 | 677 | netvsc_send_recv_completion(device, |
415f2287 | 678 | vmxferpage_packet->d.trans_id); |
fceaf24a | 679 | |
fceaf24a HJ |
680 | return; |
681 | } | |
682 | ||
454f18a9 | 683 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 684 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 685 | list_del(&xferpage_packet->list_ent); |
d29274ef | 686 | |
21a80820 | 687 | /* This is how much we can satisfy */ |
72a2f5bd | 688 | xferpage_packet->count = count - 1; |
21a80820 | 689 | |
415f2287 | 690 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
8bff33ab | 691 | netdev_err(ndev, "Needed %d netvsc pkts to satisfy " |
c909ebbd | 692 | "this xfer page...got %d\n", |
eb335bc4 | 693 | vmxferpage_packet->range_cnt, xferpage_packet->count); |
fceaf24a HJ |
694 | } |
695 | ||
454f18a9 | 696 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 697 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 698 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 699 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 700 | |
454f18a9 | 701 | /* Initialize the netvsc packet */ |
72a2f5bd HZ |
702 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
703 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 704 | netvsc_receive_completion; |
72a2f5bd | 705 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 706 | netvsc_packet; |
72a2f5bd | 707 | netvsc_packet->device = device; |
21a80820 | 708 | /* Save this so that we can send it back */ |
72a2f5bd | 709 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 710 | vmxferpage_packet->d.trans_id; |
fceaf24a | 711 | |
72a2f5bd | 712 | netvsc_packet->total_data_buflen = |
415f2287 | 713 | vmxferpage_packet->ranges[i].byte_count; |
72a2f5bd | 714 | netvsc_packet->page_buf_cnt = 1; |
fceaf24a | 715 | |
ca623ad3 | 716 | netvsc_packet->page_buf[0].len = |
415f2287 | 717 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 718 | |
85799a37 | 719 | start = virt_to_phys((void *)((unsigned long)net_device-> |
415f2287 | 720 | recv_buf + vmxferpage_packet->ranges[i].byte_offset)); |
fceaf24a | 721 | |
ca623ad3 | 722 | netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT; |
53d21fdb | 723 | end_virtual = (unsigned long)net_device->recv_buf |
415f2287 HZ |
724 | + vmxferpage_packet->ranges[i].byte_offset |
725 | + vmxferpage_packet->ranges[i].byte_count - 1; | |
85799a37 | 726 | end = virt_to_phys((void *)end_virtual); |
fceaf24a | 727 | |
454f18a9 | 728 | /* Calculate the page relative offset */ |
ca623ad3 | 729 | netvsc_packet->page_buf[0].offset = |
415f2287 | 730 | vmxferpage_packet->ranges[i].byte_offset & |
85799a37 | 731 | (PAGE_SIZE - 1); |
21a80820 GKH |
732 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { |
733 | /* Handle frame across multiple pages: */ | |
ca623ad3 HZ |
734 | netvsc_packet->page_buf[0].len = |
735 | (netvsc_packet->page_buf[0].pfn << | |
85799a37 | 736 | PAGE_SHIFT) |
21a80820 | 737 | + PAGE_SIZE - start; |
72a2f5bd | 738 | bytes_remain = netvsc_packet->total_data_buflen - |
ca623ad3 | 739 | netvsc_packet->page_buf[0].len; |
21a80820 | 740 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { |
ca623ad3 | 741 | netvsc_packet->page_buf[j].offset = 0; |
85799a37 | 742 | if (bytes_remain <= PAGE_SIZE) { |
ca623ad3 | 743 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
744 | bytes_remain; |
745 | bytes_remain = 0; | |
21a80820 | 746 | } else { |
ca623ad3 | 747 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
748 | PAGE_SIZE; |
749 | bytes_remain -= PAGE_SIZE; | |
21a80820 | 750 | } |
ca623ad3 | 751 | netvsc_packet->page_buf[j].pfn = |
85799a37 HZ |
752 | virt_to_phys((void *)(end_virtual - |
753 | bytes_remain)) >> PAGE_SHIFT; | |
72a2f5bd | 754 | netvsc_packet->page_buf_cnt++; |
85799a37 | 755 | if (bytes_remain == 0) |
21a80820 | 756 | break; |
fceaf24a | 757 | } |
fceaf24a | 758 | } |
fceaf24a | 759 | |
454f18a9 | 760 | /* Pass it to the upper layer */ |
ac6f7859 | 761 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 762 | |
5a71ae30 | 763 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 764 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
765 | } |
766 | ||
fceaf24a HJ |
767 | } |
768 | ||
5a71ae30 | 769 | static void netvsc_channel_cb(void *context) |
fceaf24a | 770 | { |
21a80820 | 771 | int ret; |
85799a37 HZ |
772 | struct hv_device *device = context; |
773 | struct netvsc_device *net_device; | |
774 | u32 bytes_recvd; | |
775 | u64 request_id; | |
c6fcf0ba | 776 | unsigned char *packet; |
8dc0a06a | 777 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
778 | unsigned char *buffer; |
779 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 780 | struct net_device *ndev; |
fceaf24a | 781 | |
c6fcf0ba | 782 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 783 | GFP_ATOMIC); |
c6fcf0ba BP |
784 | if (!packet) |
785 | return; | |
786 | buffer = packet; | |
787 | ||
5a71ae30 | 788 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 789 | if (!net_device) |
c6fcf0ba | 790 | goto out; |
2ddd5e5f | 791 | ndev = net_device->ndev; |
fceaf24a | 792 | |
21a80820 | 793 | do { |
9f630068 | 794 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 795 | &bytes_recvd, &request_id); |
21a80820 | 796 | if (ret == 0) { |
85799a37 | 797 | if (bytes_recvd > 0) { |
21a80820 | 798 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
799 | switch (desc->type) { |
800 | case VM_PKT_COMP: | |
5a71ae30 | 801 | netvsc_send_completion(device, desc); |
21a80820 GKH |
802 | break; |
803 | ||
415f2287 | 804 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 805 | netvsc_receive(device, desc); |
21a80820 GKH |
806 | break; |
807 | ||
808 | default: | |
d9871158 | 809 | netdev_err(ndev, |
21a80820 GKH |
810 | "unhandled packet type %d, " |
811 | "tid %llx len %d\n", | |
415f2287 | 812 | desc->type, request_id, |
85799a37 | 813 | bytes_recvd); |
21a80820 | 814 | break; |
fceaf24a HJ |
815 | } |
816 | ||
454f18a9 | 817 | /* reset */ |
c6fcf0ba | 818 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 819 | kfree(buffer); |
fceaf24a | 820 | buffer = packet; |
c6fcf0ba | 821 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a | 822 | } |
21a80820 | 823 | } else { |
454f18a9 | 824 | /* reset */ |
c6fcf0ba | 825 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 826 | kfree(buffer); |
fceaf24a | 827 | buffer = packet; |
c6fcf0ba | 828 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
829 | } |
830 | ||
831 | break; | |
832 | } | |
3d5cad97 | 833 | } else if (ret == -ENOBUFS) { |
21a80820 | 834 | /* Handle large packet */ |
85799a37 | 835 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 836 | if (buffer == NULL) { |
454f18a9 | 837 | /* Try again next time around */ |
d9871158 | 838 | netdev_err(ndev, |
21a80820 | 839 | "unable to allocate buffer of size " |
c909ebbd | 840 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
841 | break; |
842 | } | |
843 | ||
85799a37 | 844 | bufferlen = bytes_recvd; |
fceaf24a HJ |
845 | } |
846 | } while (1); | |
847 | ||
c6fcf0ba BP |
848 | out: |
849 | kfree(buffer); | |
fceaf24a HJ |
850 | return; |
851 | } | |
af24ce42 | 852 | |
b637e023 HZ |
853 | /* |
854 | * netvsc_device_add - Callback when the device belonging to this | |
855 | * driver is added | |
856 | */ | |
7bd23a4d | 857 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
858 | { |
859 | int ret = 0; | |
860 | int i; | |
aae23986 S |
861 | int ring_size = |
862 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
863 | struct netvsc_device *net_device; |
864 | struct hv_netvsc_packet *packet, *pos; | |
2ddd5e5f | 865 | struct net_device *ndev; |
b637e023 HZ |
866 | |
867 | net_device = alloc_net_device(device); | |
868 | if (!net_device) { | |
ace163a8 | 869 | ret = -ENOMEM; |
b637e023 HZ |
870 | goto cleanup; |
871 | } | |
872 | ||
2ddd5e5f S |
873 | /* |
874 | * Coming into this function, struct net_device * is | |
875 | * registered as the driver private data. | |
876 | * In alloc_net_device(), we register struct netvsc_device * | |
877 | * as the driver private data and stash away struct net_device * | |
878 | * in struct netvsc_device *. | |
879 | */ | |
880 | ndev = net_device->ndev; | |
881 | ||
b637e023 HZ |
882 | /* Initialize the NetVSC channel extension */ |
883 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
884 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
885 | ||
b637e023 HZ |
886 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
887 | ||
888 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
889 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
890 | (NETVSC_RECEIVE_SG_COUNT * | |
891 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
892 | if (!packet) | |
893 | break; | |
894 | ||
895 | list_add_tail(&packet->list_ent, | |
896 | &net_device->recv_pkt_list); | |
897 | } | |
35abb21a | 898 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
899 | |
900 | /* Open the channel */ | |
aae23986 S |
901 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
902 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
903 | netvsc_channel_cb, device); |
904 | ||
905 | if (ret != 0) { | |
d9871158 | 906 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
907 | goto cleanup; |
908 | } | |
909 | ||
910 | /* Channel is opened */ | |
c909ebbd | 911 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 HZ |
912 | |
913 | /* Connect with the NetVsp */ | |
914 | ret = netvsc_connect_vsp(device); | |
915 | if (ret != 0) { | |
d9871158 | 916 | netdev_err(ndev, |
c909ebbd | 917 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
918 | goto close; |
919 | } | |
920 | ||
921 | return ret; | |
922 | ||
923 | close: | |
924 | /* Now, we can close the channel safely */ | |
925 | vmbus_close(device->channel); | |
926 | ||
927 | cleanup: | |
928 | ||
929 | if (net_device) { | |
930 | list_for_each_entry_safe(packet, pos, | |
931 | &net_device->recv_pkt_list, | |
932 | list_ent) { | |
933 | list_del(&packet->list_ent); | |
934 | kfree(packet); | |
935 | } | |
936 | ||
356c4657 | 937 | kfree(net_device); |
b637e023 HZ |
938 | } |
939 | ||
940 | return ret; | |
941 | } |