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> |
f157e78d | 31 | #include <linux/if_ether.h> |
3f335ea2 | 32 | |
5ca7252a | 33 | #include "hyperv_net.h" |
fceaf24a HJ |
34 | |
35 | ||
5a71ae30 | 36 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 37 | { |
85799a37 | 38 | struct netvsc_device *net_device; |
2ddd5e5f | 39 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 40 | |
85799a37 HZ |
41 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
42 | if (!net_device) | |
fceaf24a HJ |
43 | return NULL; |
44 | ||
dc5cd894 | 45 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 46 | net_device->start_remove = false; |
c38b9c71 | 47 | net_device->destroy = false; |
53d21fdb | 48 | net_device->dev = device; |
2ddd5e5f | 49 | net_device->ndev = ndev; |
fceaf24a | 50 | |
2ddd5e5f | 51 | hv_set_drvdata(device, net_device); |
85799a37 | 52 | return net_device; |
fceaf24a HJ |
53 | } |
54 | ||
5a71ae30 | 55 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 56 | { |
85799a37 | 57 | struct netvsc_device *net_device; |
fceaf24a | 58 | |
2ddd5e5f | 59 | net_device = hv_get_drvdata(device); |
9d88f33a | 60 | if (net_device && net_device->destroy) |
85799a37 | 61 | net_device = NULL; |
fceaf24a | 62 | |
85799a37 | 63 | return net_device; |
fceaf24a HJ |
64 | } |
65 | ||
5a71ae30 | 66 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 67 | { |
85799a37 | 68 | struct netvsc_device *net_device; |
fceaf24a | 69 | |
2ddd5e5f | 70 | net_device = hv_get_drvdata(device); |
9d88f33a S |
71 | |
72 | if (!net_device) | |
73 | goto get_in_err; | |
74 | ||
75 | if (net_device->destroy && | |
76 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 77 | net_device = NULL; |
fceaf24a | 78 | |
9d88f33a | 79 | get_in_err: |
85799a37 | 80 | return net_device; |
fceaf24a HJ |
81 | } |
82 | ||
fceaf24a | 83 | |
ec91cd09 HZ |
84 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
85 | { | |
86 | struct nvsp_message *revoke_packet; | |
87 | int ret = 0; | |
2ddd5e5f | 88 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
89 | |
90 | /* | |
91 | * If we got a section count, it means we received a | |
92 | * SendReceiveBufferComplete msg (ie sent | |
93 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
94 | * to send a revoke msg here | |
95 | */ | |
96 | if (net_device->recv_section_cnt) { | |
97 | /* Send the revoke receive buffer */ | |
98 | revoke_packet = &net_device->revoke_packet; | |
99 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
100 | ||
101 | revoke_packet->hdr.msg_type = | |
102 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
103 | revoke_packet->msg.v1_msg. | |
104 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
105 | ||
106 | ret = vmbus_sendpacket(net_device->dev->channel, | |
107 | revoke_packet, | |
108 | sizeof(struct nvsp_message), | |
109 | (unsigned long)revoke_packet, | |
110 | VM_PKT_DATA_INBAND, 0); | |
111 | /* | |
112 | * If we failed here, we might as well return and | |
113 | * have a leak rather than continue and a bugchk | |
114 | */ | |
115 | if (ret != 0) { | |
d9871158 | 116 | netdev_err(ndev, "unable to send " |
c909ebbd | 117 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 118 | return ret; |
ec91cd09 HZ |
119 | } |
120 | } | |
121 | ||
122 | /* Teardown the gpadl on the vsp end */ | |
123 | if (net_device->recv_buf_gpadl_handle) { | |
124 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
125 | net_device->recv_buf_gpadl_handle); | |
126 | ||
127 | /* If we failed here, we might as well return and have a leak | |
128 | * rather than continue and a bugchk | |
129 | */ | |
130 | if (ret != 0) { | |
d9871158 | 131 | netdev_err(ndev, |
c909ebbd | 132 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 133 | return ret; |
ec91cd09 HZ |
134 | } |
135 | net_device->recv_buf_gpadl_handle = 0; | |
136 | } | |
137 | ||
138 | if (net_device->recv_buf) { | |
139 | /* Free up the receive buffer */ | |
140 | free_pages((unsigned long)net_device->recv_buf, | |
141 | get_order(net_device->recv_buf_size)); | |
142 | net_device->recv_buf = NULL; | |
143 | } | |
144 | ||
145 | if (net_device->recv_section) { | |
146 | net_device->recv_section_cnt = 0; | |
147 | kfree(net_device->recv_section); | |
148 | net_device->recv_section = NULL; | |
149 | } | |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
5a71ae30 | 154 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 155 | { |
21a80820 | 156 | int ret = 0; |
35abb21a | 157 | int t; |
85799a37 HZ |
158 | struct netvsc_device *net_device; |
159 | struct nvsp_message *init_packet; | |
2ddd5e5f | 160 | struct net_device *ndev; |
fceaf24a | 161 | |
5a71ae30 | 162 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 163 | if (!net_device) |
927bc33c | 164 | return -ENODEV; |
2ddd5e5f | 165 | ndev = net_device->ndev; |
fceaf24a | 166 | |
53d21fdb | 167 | net_device->recv_buf = |
df3493e0 S |
168 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
169 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 170 | if (!net_device->recv_buf) { |
d9871158 | 171 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 172 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 173 | ret = -ENOMEM; |
0c3b7b2f | 174 | goto cleanup; |
fceaf24a | 175 | } |
fceaf24a | 176 | |
454f18a9 BP |
177 | /* |
178 | * Establish the gpadl handle for this buffer on this | |
179 | * channel. Note: This call uses the vmbus connection rather | |
180 | * than the channel to establish the gpadl handle. | |
181 | */ | |
53d21fdb HZ |
182 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
183 | net_device->recv_buf_size, | |
184 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 185 | if (ret != 0) { |
d9871158 | 186 | netdev_err(ndev, |
c909ebbd | 187 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 188 | goto cleanup; |
fceaf24a HJ |
189 | } |
190 | ||
fceaf24a | 191 | |
454f18a9 | 192 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 193 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 194 | |
85799a37 | 195 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 196 | |
53d21fdb HZ |
197 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
198 | init_packet->msg.v1_msg.send_recv_buf. | |
199 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
200 | init_packet->msg.v1_msg. | |
201 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 202 | |
454f18a9 | 203 | /* Send the gpadl notification request */ |
85799a37 | 204 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 205 | sizeof(struct nvsp_message), |
85799a37 | 206 | (unsigned long)init_packet, |
415f2287 | 207 | VM_PKT_DATA_INBAND, |
5a4df290 | 208 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 209 | if (ret != 0) { |
d9871158 | 210 | netdev_err(ndev, |
c909ebbd | 211 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 212 | goto cleanup; |
fceaf24a HJ |
213 | } |
214 | ||
5c5781b3 | 215 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 216 | BUG_ON(t == 0); |
0c3b7b2f | 217 | |
fceaf24a | 218 | |
454f18a9 | 219 | /* Check the response */ |
53d21fdb HZ |
220 | if (init_packet->msg.v1_msg. |
221 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 222 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 223 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
224 | init_packet->msg.v1_msg. |
225 | send_recv_buf_complete.status); | |
927bc33c | 226 | ret = -EINVAL; |
0c3b7b2f | 227 | goto cleanup; |
fceaf24a HJ |
228 | } |
229 | ||
454f18a9 | 230 | /* Parse the response */ |
fceaf24a | 231 | |
53d21fdb HZ |
232 | net_device->recv_section_cnt = init_packet->msg. |
233 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 234 | |
c1813200 HZ |
235 | net_device->recv_section = kmemdup( |
236 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
237 | net_device->recv_section_cnt * | |
238 | sizeof(struct nvsp_1_receive_buffer_section), | |
239 | GFP_KERNEL); | |
53d21fdb | 240 | if (net_device->recv_section == NULL) { |
927bc33c | 241 | ret = -EINVAL; |
0c3b7b2f | 242 | goto cleanup; |
fceaf24a HJ |
243 | } |
244 | ||
21a80820 GKH |
245 | /* |
246 | * For 1st release, there should only be 1 section that represents the | |
247 | * entire receive buffer | |
248 | */ | |
53d21fdb HZ |
249 | if (net_device->recv_section_cnt != 1 || |
250 | net_device->recv_section->offset != 0) { | |
927bc33c | 251 | ret = -EINVAL; |
0c3b7b2f | 252 | goto cleanup; |
fceaf24a HJ |
253 | } |
254 | ||
0c3b7b2f | 255 | goto exit; |
fceaf24a | 256 | |
0c3b7b2f | 257 | cleanup: |
5a71ae30 | 258 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 259 | |
0c3b7b2f | 260 | exit: |
fceaf24a HJ |
261 | return ret; |
262 | } | |
263 | ||
fceaf24a | 264 | |
f157e78d HZ |
265 | /* Negotiate NVSP protocol version */ |
266 | static int negotiate_nvsp_ver(struct hv_device *device, | |
267 | struct netvsc_device *net_device, | |
268 | struct nvsp_message *init_packet, | |
269 | u32 nvsp_ver) | |
fceaf24a | 270 | { |
35abb21a | 271 | int ret, t; |
fceaf24a | 272 | |
85799a37 | 273 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 274 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
275 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
276 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 277 | |
454f18a9 | 278 | /* Send the init request */ |
85799a37 | 279 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 280 | sizeof(struct nvsp_message), |
85799a37 | 281 | (unsigned long)init_packet, |
415f2287 | 282 | VM_PKT_DATA_INBAND, |
5a4df290 | 283 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 284 | |
b8a3d52b | 285 | if (ret != 0) |
f157e78d | 286 | return ret; |
fceaf24a | 287 | |
5c5781b3 | 288 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 289 | |
f157e78d HZ |
290 | if (t == 0) |
291 | return -ETIMEDOUT; | |
fceaf24a | 292 | |
53d21fdb | 293 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
294 | NVSP_STAT_SUCCESS) |
295 | return -EINVAL; | |
fceaf24a | 296 | |
f157e78d HZ |
297 | if (nvsp_ver != NVSP_PROTOCOL_VERSION_2) |
298 | return 0; | |
299 | ||
300 | /* NVSPv2 only: Send NDIS config */ | |
301 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
302 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d447c9a | 303 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu; |
1f5f3a75 | 304 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d HZ |
305 | |
306 | ret = vmbus_sendpacket(device->channel, init_packet, | |
307 | sizeof(struct nvsp_message), | |
308 | (unsigned long)init_packet, | |
309 | VM_PKT_DATA_INBAND, 0); | |
310 | ||
311 | return ret; | |
312 | } | |
313 | ||
314 | static int netvsc_connect_vsp(struct hv_device *device) | |
315 | { | |
316 | int ret; | |
317 | struct netvsc_device *net_device; | |
318 | struct nvsp_message *init_packet; | |
319 | int ndis_version; | |
320 | struct net_device *ndev; | |
321 | ||
322 | net_device = get_outbound_net_device(device); | |
323 | if (!net_device) | |
324 | return -ENODEV; | |
325 | ndev = net_device->ndev; | |
326 | ||
327 | init_packet = &net_device->channel_init_pkt; | |
328 | ||
329 | /* Negotiate the latest NVSP protocol supported */ | |
330 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
331 | NVSP_PROTOCOL_VERSION_2) == 0) { | |
332 | net_device->nvsp_version = NVSP_PROTOCOL_VERSION_2; | |
333 | } else if (negotiate_nvsp_ver(device, net_device, init_packet, | |
334 | NVSP_PROTOCOL_VERSION_1) == 0) { | |
335 | net_device->nvsp_version = NVSP_PROTOCOL_VERSION_1; | |
336 | } else { | |
0f48c72c | 337 | ret = -EPROTO; |
0c3b7b2f | 338 | goto cleanup; |
fceaf24a | 339 | } |
f157e78d HZ |
340 | |
341 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
342 | ||
454f18a9 | 343 | /* Send the ndis version */ |
85799a37 | 344 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 345 | |
1f5f3a75 | 346 | ndis_version = 0x00050001; |
fceaf24a | 347 | |
53d21fdb HZ |
348 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
349 | init_packet->msg.v1_msg. | |
350 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 351 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
352 | init_packet->msg.v1_msg. |
353 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 354 | ndis_version & 0xFFFF; |
fceaf24a | 355 | |
454f18a9 | 356 | /* Send the init request */ |
85799a37 | 357 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
358 | sizeof(struct nvsp_message), |
359 | (unsigned long)init_packet, | |
360 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 361 | if (ret != 0) |
0c3b7b2f | 362 | goto cleanup; |
454f18a9 BP |
363 | |
364 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 365 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 366 | |
0c3b7b2f | 367 | cleanup: |
fceaf24a HJ |
368 | return ret; |
369 | } | |
370 | ||
648dc598 | 371 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 372 | { |
5a71ae30 | 373 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
374 | } |
375 | ||
3e189519 | 376 | /* |
5a71ae30 | 377 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 378 | */ |
905620d1 | 379 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 380 | { |
85799a37 HZ |
381 | struct netvsc_device *net_device; |
382 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
c38b9c71 | 383 | unsigned long flags; |
fceaf24a | 384 | |
2ddd5e5f | 385 | net_device = hv_get_drvdata(device); |
fceaf24a | 386 | |
648dc598 | 387 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 388 | |
3852409b | 389 | /* |
9d88f33a S |
390 | * Since we have already drained, we don't need to busy wait |
391 | * as was done in final_release_stor_device() | |
392 | * Note that we cannot set the ext pointer to NULL until | |
393 | * we have drained - to drain the outgoing packets, we need to | |
394 | * allow incoming packets. | |
3852409b | 395 | */ |
9d88f33a S |
396 | |
397 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 398 | hv_set_drvdata(device, NULL); |
9d88f33a | 399 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 400 | |
86c921af S |
401 | /* |
402 | * At this point, no one should be accessing net_device | |
403 | * except in here | |
404 | */ | |
c909ebbd | 405 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 406 | |
454f18a9 | 407 | /* Now, we can close the channel safely */ |
85799a37 | 408 | vmbus_close(device->channel); |
fceaf24a | 409 | |
454f18a9 | 410 | /* Release all resources */ |
85799a37 | 411 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 412 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 413 | list_del(&netvsc_packet->list_ent); |
85799a37 | 414 | kfree(netvsc_packet); |
fceaf24a HJ |
415 | } |
416 | ||
356c4657 | 417 | kfree(net_device); |
21a80820 | 418 | return 0; |
fceaf24a HJ |
419 | } |
420 | ||
33be96e4 HZ |
421 | |
422 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
423 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
424 | ||
425 | /* | |
426 | * Get the percentage of available bytes to write in the ring. | |
427 | * The return value is in range from 0 to 100. | |
428 | */ | |
429 | static inline u32 hv_ringbuf_avail_percent( | |
430 | struct hv_ring_buffer_info *ring_info) | |
431 | { | |
432 | u32 avail_read, avail_write; | |
433 | ||
434 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
435 | ||
436 | return avail_write * 100 / ring_info->ring_datasize; | |
437 | } | |
438 | ||
5a71ae30 | 439 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 440 | struct vmpacket_descriptor *packet) |
fceaf24a | 441 | { |
85799a37 HZ |
442 | struct netvsc_device *net_device; |
443 | struct nvsp_message *nvsp_packet; | |
444 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 445 | struct net_device *ndev; |
fceaf24a | 446 | |
5a71ae30 | 447 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 448 | if (!net_device) |
fceaf24a | 449 | return; |
2ddd5e5f | 450 | ndev = net_device->ndev; |
fceaf24a | 451 | |
85799a37 | 452 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 453 | (packet->offset8 << 3)); |
fceaf24a | 454 | |
53d21fdb HZ |
455 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
456 | (nvsp_packet->hdr.msg_type == | |
457 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
458 | (nvsp_packet->hdr.msg_type == | |
459 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 460 | /* Copy the response back */ |
53d21fdb | 461 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 462 | sizeof(struct nvsp_message)); |
35abb21a | 463 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
464 | } else if (nvsp_packet->hdr.msg_type == |
465 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 HZ |
466 | int num_outstanding_sends; |
467 | ||
454f18a9 | 468 | /* Get the send context */ |
85799a37 | 469 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 470 | packet->trans_id; |
fceaf24a | 471 | |
454f18a9 | 472 | /* Notify the layer above us */ |
f1ea3cd7 HZ |
473 | if (nvsc_packet) |
474 | nvsc_packet->completion.send.send_completion( | |
475 | nvsc_packet->completion.send. | |
476 | send_completion_ctx); | |
fceaf24a | 477 | |
33be96e4 HZ |
478 | num_outstanding_sends = |
479 | atomic_dec_return(&net_device->num_outstanding_sends); | |
1d06825b | 480 | |
dc5cd894 HZ |
481 | if (net_device->destroy && num_outstanding_sends == 0) |
482 | wake_up(&net_device->wait_drain); | |
483 | ||
33be96e4 HZ |
484 | if (netif_queue_stopped(ndev) && !net_device->start_remove && |
485 | (hv_ringbuf_avail_percent(&device->channel->outbound) | |
486 | > RING_AVAIL_PERCENT_HIWATER || | |
487 | num_outstanding_sends < 1)) | |
488 | netif_wake_queue(ndev); | |
21a80820 | 489 | } else { |
d9871158 | 490 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 491 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
492 | } |
493 | ||
fceaf24a HJ |
494 | } |
495 | ||
f9819f05 | 496 | int netvsc_send(struct hv_device *device, |
85799a37 | 497 | struct hv_netvsc_packet *packet) |
fceaf24a | 498 | { |
85799a37 | 499 | struct netvsc_device *net_device; |
21a80820 | 500 | int ret = 0; |
223c1aa6 | 501 | struct nvsp_message sendMessage; |
2ddd5e5f | 502 | struct net_device *ndev; |
f1ea3cd7 | 503 | u64 req_id; |
fceaf24a | 504 | |
5a71ae30 | 505 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 506 | if (!net_device) |
ff2bd69a | 507 | return -ENODEV; |
2ddd5e5f | 508 | ndev = net_device->ndev; |
fceaf24a | 509 | |
53d21fdb | 510 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 511 | if (packet->is_data_pkt) { |
21a80820 | 512 | /* 0 is RMC_DATA; */ |
53d21fdb | 513 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
514 | } else { |
515 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 516 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 517 | } |
fceaf24a | 518 | |
454f18a9 | 519 | /* Not using send buffer section */ |
53d21fdb HZ |
520 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
521 | 0xFFFFFFFF; | |
522 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 523 | |
f1ea3cd7 | 524 | if (packet->completion.send.send_completion) |
00ca8f0c | 525 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
526 | else |
527 | req_id = 0; | |
528 | ||
72a2f5bd | 529 | if (packet->page_buf_cnt) { |
85799a37 | 530 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
531 | packet->page_buf, |
532 | packet->page_buf_cnt, | |
ff3f8eec GKH |
533 | &sendMessage, |
534 | sizeof(struct nvsp_message), | |
f1ea3cd7 | 535 | req_id); |
21a80820 | 536 | } else { |
85799a37 | 537 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
e4d59ac5 | 538 | sizeof(struct nvsp_message), |
f1ea3cd7 | 539 | req_id, |
e4d59ac5 HZ |
540 | VM_PKT_DATA_INBAND, |
541 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
542 | } |
543 | ||
1d06825b HZ |
544 | if (ret == 0) { |
545 | atomic_inc(&net_device->num_outstanding_sends); | |
33be96e4 HZ |
546 | if (hv_ringbuf_avail_percent(&device->channel->outbound) < |
547 | RING_AVAIL_PERCENT_LOWATER) { | |
548 | netif_stop_queue(ndev); | |
549 | if (atomic_read(&net_device-> | |
550 | num_outstanding_sends) < 1) | |
551 | netif_wake_queue(ndev); | |
552 | } | |
1d06825b HZ |
553 | } else if (ret == -EAGAIN) { |
554 | netif_stop_queue(ndev); | |
33be96e4 | 555 | if (atomic_read(&net_device->num_outstanding_sends) < 1) { |
1d06825b | 556 | netif_wake_queue(ndev); |
33be96e4 HZ |
557 | ret = -ENOSPC; |
558 | } | |
1d06825b | 559 | } else { |
d9871158 | 560 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 561 | packet, ret); |
1d06825b | 562 | } |
fceaf24a | 563 | |
fceaf24a HJ |
564 | return ret; |
565 | } | |
566 | ||
5fa9d3c5 | 567 | static void netvsc_send_recv_completion(struct hv_device *device, |
63f6921d | 568 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
569 | { |
570 | struct nvsp_message recvcompMessage; | |
571 | int retries = 0; | |
572 | int ret; | |
2ddd5e5f S |
573 | struct net_device *ndev; |
574 | struct netvsc_device *net_device = hv_get_drvdata(device); | |
575 | ||
576 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
577 | |
578 | recvcompMessage.hdr.msg_type = | |
579 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
580 | ||
63f6921d | 581 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
582 | |
583 | retry_send_cmplt: | |
584 | /* Send the completion */ | |
585 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, | |
586 | sizeof(struct nvsp_message), transaction_id, | |
587 | VM_PKT_COMP, 0); | |
588 | if (ret == 0) { | |
589 | /* success */ | |
590 | /* no-op */ | |
d2598f01 | 591 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
592 | /* no more room...wait a bit and attempt to retry 3 times */ |
593 | retries++; | |
d9871158 | 594 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 595 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
596 | |
597 | if (retries < 4) { | |
598 | udelay(100); | |
599 | goto retry_send_cmplt; | |
600 | } else { | |
d9871158 | 601 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 602 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
603 | transaction_id); |
604 | } | |
605 | } else { | |
d9871158 | 606 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 607 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
608 | } |
609 | } | |
610 | ||
57991156 HZ |
611 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
612 | static void netvsc_receive_completion(void *context) | |
613 | { | |
614 | struct hv_netvsc_packet *packet = context; | |
c2fd03a0 | 615 | struct hv_device *device = packet->device; |
57991156 HZ |
616 | struct netvsc_device *net_device; |
617 | u64 transaction_id = 0; | |
618 | bool fsend_receive_comp = false; | |
619 | unsigned long flags; | |
2ddd5e5f | 620 | struct net_device *ndev; |
63f6921d | 621 | u32 status = NVSP_STAT_NONE; |
57991156 HZ |
622 | |
623 | /* | |
624 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
625 | * send out receive completion, we are using GetInboundNetDevice() | |
626 | * since we may have disable outbound traffic already. | |
627 | */ | |
628 | net_device = get_inbound_net_device(device); | |
2ddd5e5f | 629 | if (!net_device) |
57991156 | 630 | return; |
2ddd5e5f | 631 | ndev = net_device->ndev; |
57991156 HZ |
632 | |
633 | /* Overloading use of the lock. */ | |
634 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
635 | ||
63f6921d HZ |
636 | if (packet->status != NVSP_STAT_SUCCESS) |
637 | packet->xfer_page_pkt->status = NVSP_STAT_FAIL; | |
638 | ||
57991156 HZ |
639 | packet->xfer_page_pkt->count--; |
640 | ||
641 | /* | |
642 | * Last one in the line that represent 1 xfer page packet. | |
643 | * Return the xfer page packet itself to the freelist | |
644 | */ | |
645 | if (packet->xfer_page_pkt->count == 0) { | |
646 | fsend_receive_comp = true; | |
647 | transaction_id = packet->completion.recv.recv_completion_tid; | |
63f6921d | 648 | status = packet->xfer_page_pkt->status; |
57991156 HZ |
649 | list_add_tail(&packet->xfer_page_pkt->list_ent, |
650 | &net_device->recv_pkt_list); | |
651 | ||
652 | } | |
653 | ||
654 | /* Put the packet back */ | |
655 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
656 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
657 | ||
658 | /* Send a receive completion for the xfer page packet */ | |
659 | if (fsend_receive_comp) | |
63f6921d | 660 | netvsc_send_recv_completion(device, transaction_id, status); |
57991156 | 661 | |
57991156 HZ |
662 | } |
663 | ||
5a71ae30 | 664 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 665 | struct vmpacket_descriptor *packet) |
fceaf24a | 666 | { |
85799a37 HZ |
667 | struct netvsc_device *net_device; |
668 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
669 | struct nvsp_message *nvsp_packet; | |
670 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
7e23a6e9 | 671 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 672 | struct xferpage_packet *xferpage_packet = NULL; |
45326342 HZ |
673 | int i; |
674 | int count = 0; | |
6436873a | 675 | unsigned long flags; |
2ddd5e5f | 676 | struct net_device *ndev; |
779b4d17 | 677 | |
d29274ef | 678 | LIST_HEAD(listHead); |
fceaf24a | 679 | |
5a71ae30 | 680 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 681 | if (!net_device) |
fceaf24a | 682 | return; |
2ddd5e5f | 683 | ndev = net_device->ndev; |
fceaf24a | 684 | |
21a80820 GKH |
685 | /* |
686 | * All inbound packets other than send completion should be xfer page | |
687 | * packet | |
688 | */ | |
415f2287 | 689 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 690 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 691 | packet->type); |
fceaf24a HJ |
692 | return; |
693 | } | |
694 | ||
85799a37 | 695 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 696 | (packet->offset8 << 3)); |
fceaf24a | 697 | |
454f18a9 | 698 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
699 | if (nvsp_packet->hdr.msg_type != |
700 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 701 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 702 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
703 | return; |
704 | } | |
705 | ||
85799a37 | 706 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 707 | |
415f2287 | 708 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 709 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 710 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 711 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
712 | return; |
713 | } | |
714 | ||
454f18a9 BP |
715 | /* |
716 | * Grab free packets (range count + 1) to represent this xfer | |
717 | * page packet. +1 to represent the xfer page packet itself. | |
718 | * We grab it here so that we know exactly how many we can | |
719 | * fulfil | |
720 | */ | |
53d21fdb HZ |
721 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
722 | while (!list_empty(&net_device->recv_pkt_list)) { | |
723 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 724 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
725 | break; |
726 | } | |
53d21fdb | 727 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 728 | |
454f18a9 BP |
729 | /* |
730 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
731 | * page and at least 1 for the range) i.e. we can handled | |
732 | * some of the xfer page packet ranges... | |
733 | */ | |
21a80820 | 734 | if (count < 2) { |
d9871158 | 735 | netdev_err(ndev, "Got only %d netvsc pkt...needed " |
c909ebbd | 736 | "%d pkts. Dropping this xfer page packet completely!\n", |
eb335bc4 | 737 | count, vmxferpage_packet->range_cnt + 1); |
fceaf24a | 738 | |
454f18a9 | 739 | /* Return it to the freelist */ |
53d21fdb | 740 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 741 | for (i = count; i != 0; i--) { |
92ec0893 | 742 | list_move_tail(listHead.next, |
53d21fdb | 743 | &net_device->recv_pkt_list); |
fceaf24a | 744 | } |
53d21fdb | 745 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 746 | flags); |
fceaf24a | 747 | |
5a71ae30 | 748 | netvsc_send_recv_completion(device, |
63f6921d HZ |
749 | vmxferpage_packet->d.trans_id, |
750 | NVSP_STAT_FAIL); | |
fceaf24a | 751 | |
fceaf24a HJ |
752 | return; |
753 | } | |
754 | ||
454f18a9 | 755 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 756 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 757 | list_del(&xferpage_packet->list_ent); |
63f6921d | 758 | xferpage_packet->status = NVSP_STAT_SUCCESS; |
d29274ef | 759 | |
21a80820 | 760 | /* This is how much we can satisfy */ |
72a2f5bd | 761 | xferpage_packet->count = count - 1; |
21a80820 | 762 | |
415f2287 | 763 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
8bff33ab | 764 | netdev_err(ndev, "Needed %d netvsc pkts to satisfy " |
c909ebbd | 765 | "this xfer page...got %d\n", |
eb335bc4 | 766 | vmxferpage_packet->range_cnt, xferpage_packet->count); |
fceaf24a HJ |
767 | } |
768 | ||
454f18a9 | 769 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 770 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 771 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 772 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 773 | |
454f18a9 | 774 | /* Initialize the netvsc packet */ |
63f6921d | 775 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
72a2f5bd HZ |
776 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
777 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 778 | netvsc_receive_completion; |
72a2f5bd | 779 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 780 | netvsc_packet; |
72a2f5bd | 781 | netvsc_packet->device = device; |
21a80820 | 782 | /* Save this so that we can send it back */ |
72a2f5bd | 783 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 784 | vmxferpage_packet->d.trans_id; |
fceaf24a | 785 | |
45326342 HZ |
786 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
787 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 788 | netvsc_packet->total_data_buflen = |
415f2287 | 789 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 790 | |
454f18a9 | 791 | /* Pass it to the upper layer */ |
ac6f7859 | 792 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 793 | |
5a71ae30 | 794 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 795 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
796 | } |
797 | ||
fceaf24a HJ |
798 | } |
799 | ||
5a71ae30 | 800 | static void netvsc_channel_cb(void *context) |
fceaf24a | 801 | { |
21a80820 | 802 | int ret; |
85799a37 HZ |
803 | struct hv_device *device = context; |
804 | struct netvsc_device *net_device; | |
805 | u32 bytes_recvd; | |
806 | u64 request_id; | |
c6fcf0ba | 807 | unsigned char *packet; |
8dc0a06a | 808 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
809 | unsigned char *buffer; |
810 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 811 | struct net_device *ndev; |
fceaf24a | 812 | |
c6fcf0ba | 813 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 814 | GFP_ATOMIC); |
c6fcf0ba BP |
815 | if (!packet) |
816 | return; | |
817 | buffer = packet; | |
818 | ||
5a71ae30 | 819 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 820 | if (!net_device) |
c6fcf0ba | 821 | goto out; |
2ddd5e5f | 822 | ndev = net_device->ndev; |
fceaf24a | 823 | |
21a80820 | 824 | do { |
9f630068 | 825 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 826 | &bytes_recvd, &request_id); |
21a80820 | 827 | if (ret == 0) { |
85799a37 | 828 | if (bytes_recvd > 0) { |
21a80820 | 829 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
830 | switch (desc->type) { |
831 | case VM_PKT_COMP: | |
5a71ae30 | 832 | netvsc_send_completion(device, desc); |
21a80820 GKH |
833 | break; |
834 | ||
415f2287 | 835 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 836 | netvsc_receive(device, desc); |
21a80820 GKH |
837 | break; |
838 | ||
839 | default: | |
d9871158 | 840 | netdev_err(ndev, |
21a80820 GKH |
841 | "unhandled packet type %d, " |
842 | "tid %llx len %d\n", | |
415f2287 | 843 | desc->type, request_id, |
85799a37 | 844 | bytes_recvd); |
21a80820 | 845 | break; |
fceaf24a HJ |
846 | } |
847 | ||
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 | 853 | } |
21a80820 | 854 | } else { |
454f18a9 | 855 | /* reset */ |
c6fcf0ba | 856 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 857 | kfree(buffer); |
fceaf24a | 858 | buffer = packet; |
c6fcf0ba | 859 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
860 | } |
861 | ||
862 | break; | |
863 | } | |
3d5cad97 | 864 | } else if (ret == -ENOBUFS) { |
21a80820 | 865 | /* Handle large packet */ |
85799a37 | 866 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 867 | if (buffer == NULL) { |
454f18a9 | 868 | /* Try again next time around */ |
d9871158 | 869 | netdev_err(ndev, |
21a80820 | 870 | "unable to allocate buffer of size " |
c909ebbd | 871 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
872 | break; |
873 | } | |
874 | ||
85799a37 | 875 | bufferlen = bytes_recvd; |
fceaf24a HJ |
876 | } |
877 | } while (1); | |
878 | ||
c6fcf0ba BP |
879 | out: |
880 | kfree(buffer); | |
fceaf24a HJ |
881 | return; |
882 | } | |
af24ce42 | 883 | |
b637e023 HZ |
884 | /* |
885 | * netvsc_device_add - Callback when the device belonging to this | |
886 | * driver is added | |
887 | */ | |
7bd23a4d | 888 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
889 | { |
890 | int ret = 0; | |
891 | int i; | |
aae23986 S |
892 | int ring_size = |
893 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
894 | struct netvsc_device *net_device; |
895 | struct hv_netvsc_packet *packet, *pos; | |
2ddd5e5f | 896 | struct net_device *ndev; |
b637e023 HZ |
897 | |
898 | net_device = alloc_net_device(device); | |
899 | if (!net_device) { | |
ace163a8 | 900 | ret = -ENOMEM; |
b637e023 HZ |
901 | goto cleanup; |
902 | } | |
903 | ||
2ddd5e5f S |
904 | /* |
905 | * Coming into this function, struct net_device * is | |
906 | * registered as the driver private data. | |
907 | * In alloc_net_device(), we register struct netvsc_device * | |
908 | * as the driver private data and stash away struct net_device * | |
909 | * in struct netvsc_device *. | |
910 | */ | |
911 | ndev = net_device->ndev; | |
912 | ||
b637e023 HZ |
913 | /* Initialize the NetVSC channel extension */ |
914 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
915 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
916 | ||
b637e023 HZ |
917 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
918 | ||
919 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
6562640b | 920 | packet = kzalloc(sizeof(struct hv_netvsc_packet), GFP_KERNEL); |
b637e023 HZ |
921 | if (!packet) |
922 | break; | |
923 | ||
924 | list_add_tail(&packet->list_ent, | |
925 | &net_device->recv_pkt_list); | |
926 | } | |
35abb21a | 927 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
928 | |
929 | /* Open the channel */ | |
aae23986 S |
930 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
931 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
932 | netvsc_channel_cb, device); |
933 | ||
934 | if (ret != 0) { | |
d9871158 | 935 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
936 | goto cleanup; |
937 | } | |
938 | ||
939 | /* Channel is opened */ | |
c909ebbd | 940 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 HZ |
941 | |
942 | /* Connect with the NetVsp */ | |
943 | ret = netvsc_connect_vsp(device); | |
944 | if (ret != 0) { | |
d9871158 | 945 | netdev_err(ndev, |
c909ebbd | 946 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
947 | goto close; |
948 | } | |
949 | ||
950 | return ret; | |
951 | ||
952 | close: | |
953 | /* Now, we can close the channel safely */ | |
954 | vmbus_close(device->channel); | |
955 | ||
956 | cleanup: | |
957 | ||
958 | if (net_device) { | |
959 | list_for_each_entry_safe(packet, pos, | |
960 | &net_device->recv_pkt_list, | |
961 | list_ent) { | |
962 | list_del(&packet->list_ent); | |
963 | kfree(packet); | |
964 | } | |
965 | ||
356c4657 | 966 | kfree(net_device); |
b637e023 HZ |
967 | } |
968 | ||
969 | return ret; | |
970 | } |