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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 | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
5654e932 | 22 | #include <linux/kernel.h> |
0c3b7b2f S |
23 | #include <linux/sched.h> |
24 | #include <linux/wait.h> | |
0ffa63b0 | 25 | #include <linux/mm.h> |
b4362c9c | 26 | #include <linux/delay.h> |
21a80820 | 27 | #include <linux/io.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
d9871158 | 29 | #include <linux/netdevice.h> |
f157e78d | 30 | #include <linux/if_ether.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 | ||
dc5cd894 | 44 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 45 | net_device->start_remove = false; |
c38b9c71 | 46 | net_device->destroy = false; |
53d21fdb | 47 | net_device->dev = device; |
2ddd5e5f | 48 | net_device->ndev = ndev; |
fceaf24a | 49 | |
2ddd5e5f | 50 | hv_set_drvdata(device, net_device); |
85799a37 | 51 | return net_device; |
fceaf24a HJ |
52 | } |
53 | ||
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 | |
2ddd5e5f | 58 | net_device = hv_get_drvdata(device); |
9d88f33a | 59 | if (net_device && net_device->destroy) |
85799a37 | 60 | net_device = NULL; |
fceaf24a | 61 | |
85799a37 | 62 | return net_device; |
fceaf24a HJ |
63 | } |
64 | ||
5a71ae30 | 65 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 66 | { |
85799a37 | 67 | struct netvsc_device *net_device; |
fceaf24a | 68 | |
2ddd5e5f | 69 | net_device = hv_get_drvdata(device); |
9d88f33a S |
70 | |
71 | if (!net_device) | |
72 | goto get_in_err; | |
73 | ||
74 | if (net_device->destroy && | |
75 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 76 | net_device = NULL; |
fceaf24a | 77 | |
9d88f33a | 78 | get_in_err: |
85799a37 | 79 | return net_device; |
fceaf24a HJ |
80 | } |
81 | ||
fceaf24a | 82 | |
ec91cd09 HZ |
83 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
84 | { | |
85 | struct nvsp_message *revoke_packet; | |
86 | int ret = 0; | |
2ddd5e5f | 87 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
88 | |
89 | /* | |
90 | * If we got a section count, it means we received a | |
91 | * SendReceiveBufferComplete msg (ie sent | |
92 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
93 | * to send a revoke msg here | |
94 | */ | |
95 | if (net_device->recv_section_cnt) { | |
96 | /* Send the revoke receive buffer */ | |
97 | revoke_packet = &net_device->revoke_packet; | |
98 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
99 | ||
100 | revoke_packet->hdr.msg_type = | |
101 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
102 | revoke_packet->msg.v1_msg. | |
103 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
104 | ||
105 | ret = vmbus_sendpacket(net_device->dev->channel, | |
106 | revoke_packet, | |
107 | sizeof(struct nvsp_message), | |
108 | (unsigned long)revoke_packet, | |
109 | VM_PKT_DATA_INBAND, 0); | |
110 | /* | |
111 | * If we failed here, we might as well return and | |
112 | * have a leak rather than continue and a bugchk | |
113 | */ | |
114 | if (ret != 0) { | |
d9871158 | 115 | netdev_err(ndev, "unable to send " |
c909ebbd | 116 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 117 | return ret; |
ec91cd09 HZ |
118 | } |
119 | } | |
120 | ||
121 | /* Teardown the gpadl on the vsp end */ | |
122 | if (net_device->recv_buf_gpadl_handle) { | |
123 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
124 | net_device->recv_buf_gpadl_handle); | |
125 | ||
126 | /* If we failed here, we might as well return and have a leak | |
127 | * rather than continue and a bugchk | |
128 | */ | |
129 | if (ret != 0) { | |
d9871158 | 130 | netdev_err(ndev, |
c909ebbd | 131 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 132 | return ret; |
ec91cd09 HZ |
133 | } |
134 | net_device->recv_buf_gpadl_handle = 0; | |
135 | } | |
136 | ||
137 | if (net_device->recv_buf) { | |
138 | /* Free up the receive buffer */ | |
b679ef73 | 139 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
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 | |
b679ef73 | 165 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); |
53d21fdb | 166 | if (!net_device->recv_buf) { |
d9871158 | 167 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 168 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 169 | ret = -ENOMEM; |
0c3b7b2f | 170 | goto cleanup; |
fceaf24a | 171 | } |
fceaf24a | 172 | |
454f18a9 BP |
173 | /* |
174 | * Establish the gpadl handle for this buffer on this | |
175 | * channel. Note: This call uses the vmbus connection rather | |
176 | * than the channel to establish the gpadl handle. | |
177 | */ | |
53d21fdb HZ |
178 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
179 | net_device->recv_buf_size, | |
180 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 181 | if (ret != 0) { |
d9871158 | 182 | netdev_err(ndev, |
c909ebbd | 183 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 184 | goto cleanup; |
fceaf24a HJ |
185 | } |
186 | ||
fceaf24a | 187 | |
454f18a9 | 188 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 189 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 190 | |
85799a37 | 191 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 192 | |
53d21fdb HZ |
193 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
194 | init_packet->msg.v1_msg.send_recv_buf. | |
195 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
196 | init_packet->msg.v1_msg. | |
197 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 198 | |
454f18a9 | 199 | /* Send the gpadl notification request */ |
85799a37 | 200 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 201 | sizeof(struct nvsp_message), |
85799a37 | 202 | (unsigned long)init_packet, |
415f2287 | 203 | VM_PKT_DATA_INBAND, |
5a4df290 | 204 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 205 | if (ret != 0) { |
d9871158 | 206 | netdev_err(ndev, |
c909ebbd | 207 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 208 | goto cleanup; |
fceaf24a HJ |
209 | } |
210 | ||
5c5781b3 | 211 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 212 | BUG_ON(t == 0); |
0c3b7b2f | 213 | |
fceaf24a | 214 | |
454f18a9 | 215 | /* Check the response */ |
53d21fdb HZ |
216 | if (init_packet->msg.v1_msg. |
217 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 218 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 219 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
220 | init_packet->msg.v1_msg. |
221 | send_recv_buf_complete.status); | |
927bc33c | 222 | ret = -EINVAL; |
0c3b7b2f | 223 | goto cleanup; |
fceaf24a HJ |
224 | } |
225 | ||
454f18a9 | 226 | /* Parse the response */ |
fceaf24a | 227 | |
53d21fdb HZ |
228 | net_device->recv_section_cnt = init_packet->msg. |
229 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 230 | |
c1813200 HZ |
231 | net_device->recv_section = kmemdup( |
232 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
233 | net_device->recv_section_cnt * | |
234 | sizeof(struct nvsp_1_receive_buffer_section), | |
235 | GFP_KERNEL); | |
53d21fdb | 236 | if (net_device->recv_section == NULL) { |
927bc33c | 237 | ret = -EINVAL; |
0c3b7b2f | 238 | goto cleanup; |
fceaf24a HJ |
239 | } |
240 | ||
21a80820 GKH |
241 | /* |
242 | * For 1st release, there should only be 1 section that represents the | |
243 | * entire receive buffer | |
244 | */ | |
53d21fdb HZ |
245 | if (net_device->recv_section_cnt != 1 || |
246 | net_device->recv_section->offset != 0) { | |
927bc33c | 247 | ret = -EINVAL; |
0c3b7b2f | 248 | goto cleanup; |
fceaf24a HJ |
249 | } |
250 | ||
0c3b7b2f | 251 | goto exit; |
fceaf24a | 252 | |
0c3b7b2f | 253 | cleanup: |
5a71ae30 | 254 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 255 | |
0c3b7b2f | 256 | exit: |
fceaf24a HJ |
257 | return ret; |
258 | } | |
259 | ||
fceaf24a | 260 | |
f157e78d HZ |
261 | /* Negotiate NVSP protocol version */ |
262 | static int negotiate_nvsp_ver(struct hv_device *device, | |
263 | struct netvsc_device *net_device, | |
264 | struct nvsp_message *init_packet, | |
265 | u32 nvsp_ver) | |
fceaf24a | 266 | { |
35abb21a | 267 | int ret, t; |
fceaf24a | 268 | |
85799a37 | 269 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 270 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
271 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
272 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 273 | |
454f18a9 | 274 | /* Send the init request */ |
85799a37 | 275 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 276 | sizeof(struct nvsp_message), |
85799a37 | 277 | (unsigned long)init_packet, |
415f2287 | 278 | VM_PKT_DATA_INBAND, |
5a4df290 | 279 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 280 | |
b8a3d52b | 281 | if (ret != 0) |
f157e78d | 282 | return ret; |
fceaf24a | 283 | |
5c5781b3 | 284 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 285 | |
f157e78d HZ |
286 | if (t == 0) |
287 | return -ETIMEDOUT; | |
fceaf24a | 288 | |
53d21fdb | 289 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
290 | NVSP_STAT_SUCCESS) |
291 | return -EINVAL; | |
fceaf24a | 292 | |
a1eabb01 | 293 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
294 | return 0; |
295 | ||
296 | /* NVSPv2 only: Send NDIS config */ | |
297 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
298 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d447c9a | 299 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu; |
1f5f3a75 | 300 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d HZ |
301 | |
302 | ret = vmbus_sendpacket(device->channel, init_packet, | |
303 | sizeof(struct nvsp_message), | |
304 | (unsigned long)init_packet, | |
305 | VM_PKT_DATA_INBAND, 0); | |
306 | ||
307 | return ret; | |
308 | } | |
309 | ||
310 | static int netvsc_connect_vsp(struct hv_device *device) | |
311 | { | |
312 | int ret; | |
313 | struct netvsc_device *net_device; | |
314 | struct nvsp_message *init_packet; | |
315 | int ndis_version; | |
316 | struct net_device *ndev; | |
a1eabb01 HZ |
317 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
318 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
319 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
320 | |
321 | net_device = get_outbound_net_device(device); | |
322 | if (!net_device) | |
323 | return -ENODEV; | |
324 | ndev = net_device->ndev; | |
325 | ||
326 | init_packet = &net_device->channel_init_pkt; | |
327 | ||
328 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
329 | for (i = num_ver - 1; i >= 0; i--) |
330 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
331 | ver_list[i]) == 0) { | |
332 | net_device->nvsp_version = ver_list[i]; | |
333 | break; | |
334 | } | |
335 | ||
336 | if (i < 0) { | |
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 | |
a1eabb01 HZ |
346 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
347 | ndis_version = 0x00050001; | |
348 | else | |
349 | ndis_version = 0x0006001e; | |
fceaf24a | 350 | |
53d21fdb HZ |
351 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
352 | init_packet->msg.v1_msg. | |
353 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 354 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
355 | init_packet->msg.v1_msg. |
356 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 357 | ndis_version & 0xFFFF; |
fceaf24a | 358 | |
454f18a9 | 359 | /* Send the init request */ |
85799a37 | 360 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
361 | sizeof(struct nvsp_message), |
362 | (unsigned long)init_packet, | |
363 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 364 | if (ret != 0) |
0c3b7b2f | 365 | goto cleanup; |
454f18a9 BP |
366 | |
367 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
368 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
369 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
370 | else | |
371 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
372 | ||
5a71ae30 | 373 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 374 | |
0c3b7b2f | 375 | cleanup: |
fceaf24a HJ |
376 | return ret; |
377 | } | |
378 | ||
648dc598 | 379 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 380 | { |
5a71ae30 | 381 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
382 | } |
383 | ||
3e189519 | 384 | /* |
5a71ae30 | 385 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 386 | */ |
905620d1 | 387 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 388 | { |
85799a37 HZ |
389 | struct netvsc_device *net_device; |
390 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
c38b9c71 | 391 | unsigned long flags; |
fceaf24a | 392 | |
2ddd5e5f | 393 | net_device = hv_get_drvdata(device); |
fceaf24a | 394 | |
648dc598 | 395 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 396 | |
3852409b | 397 | /* |
9d88f33a S |
398 | * Since we have already drained, we don't need to busy wait |
399 | * as was done in final_release_stor_device() | |
400 | * Note that we cannot set the ext pointer to NULL until | |
401 | * we have drained - to drain the outgoing packets, we need to | |
402 | * allow incoming packets. | |
3852409b | 403 | */ |
9d88f33a S |
404 | |
405 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 406 | hv_set_drvdata(device, NULL); |
9d88f33a | 407 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 408 | |
86c921af S |
409 | /* |
410 | * At this point, no one should be accessing net_device | |
411 | * except in here | |
412 | */ | |
c909ebbd | 413 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 414 | |
454f18a9 | 415 | /* Now, we can close the channel safely */ |
85799a37 | 416 | vmbus_close(device->channel); |
fceaf24a | 417 | |
454f18a9 | 418 | /* Release all resources */ |
85799a37 | 419 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 420 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 421 | list_del(&netvsc_packet->list_ent); |
85799a37 | 422 | kfree(netvsc_packet); |
fceaf24a HJ |
423 | } |
424 | ||
356c4657 | 425 | kfree(net_device); |
21a80820 | 426 | return 0; |
fceaf24a HJ |
427 | } |
428 | ||
33be96e4 HZ |
429 | |
430 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
431 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
432 | ||
433 | /* | |
434 | * Get the percentage of available bytes to write in the ring. | |
435 | * The return value is in range from 0 to 100. | |
436 | */ | |
437 | static inline u32 hv_ringbuf_avail_percent( | |
438 | struct hv_ring_buffer_info *ring_info) | |
439 | { | |
440 | u32 avail_read, avail_write; | |
441 | ||
442 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
443 | ||
444 | return avail_write * 100 / ring_info->ring_datasize; | |
445 | } | |
446 | ||
97c1723a KS |
447 | static void netvsc_send_completion(struct netvsc_device *net_device, |
448 | struct hv_device *device, | |
85799a37 | 449 | struct vmpacket_descriptor *packet) |
fceaf24a | 450 | { |
85799a37 HZ |
451 | struct nvsp_message *nvsp_packet; |
452 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 453 | struct net_device *ndev; |
fceaf24a | 454 | |
2ddd5e5f | 455 | ndev = net_device->ndev; |
fceaf24a | 456 | |
85799a37 | 457 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 458 | (packet->offset8 << 3)); |
fceaf24a | 459 | |
53d21fdb HZ |
460 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
461 | (nvsp_packet->hdr.msg_type == | |
462 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
463 | (nvsp_packet->hdr.msg_type == | |
464 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 465 | /* Copy the response back */ |
53d21fdb | 466 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 467 | sizeof(struct nvsp_message)); |
35abb21a | 468 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
469 | } else if (nvsp_packet->hdr.msg_type == |
470 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 HZ |
471 | int num_outstanding_sends; |
472 | ||
454f18a9 | 473 | /* Get the send context */ |
85799a37 | 474 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 475 | packet->trans_id; |
fceaf24a | 476 | |
454f18a9 | 477 | /* Notify the layer above us */ |
f1ea3cd7 HZ |
478 | if (nvsc_packet) |
479 | nvsc_packet->completion.send.send_completion( | |
480 | nvsc_packet->completion.send. | |
481 | send_completion_ctx); | |
fceaf24a | 482 | |
33be96e4 HZ |
483 | num_outstanding_sends = |
484 | atomic_dec_return(&net_device->num_outstanding_sends); | |
1d06825b | 485 | |
dc5cd894 HZ |
486 | if (net_device->destroy && num_outstanding_sends == 0) |
487 | wake_up(&net_device->wait_drain); | |
488 | ||
33be96e4 HZ |
489 | if (netif_queue_stopped(ndev) && !net_device->start_remove && |
490 | (hv_ringbuf_avail_percent(&device->channel->outbound) | |
491 | > RING_AVAIL_PERCENT_HIWATER || | |
492 | num_outstanding_sends < 1)) | |
493 | netif_wake_queue(ndev); | |
21a80820 | 494 | } else { |
d9871158 | 495 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 496 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
497 | } |
498 | ||
fceaf24a HJ |
499 | } |
500 | ||
f9819f05 | 501 | int netvsc_send(struct hv_device *device, |
85799a37 | 502 | struct hv_netvsc_packet *packet) |
fceaf24a | 503 | { |
85799a37 | 504 | struct netvsc_device *net_device; |
21a80820 | 505 | int ret = 0; |
223c1aa6 | 506 | struct nvsp_message sendMessage; |
2ddd5e5f | 507 | struct net_device *ndev; |
f1ea3cd7 | 508 | u64 req_id; |
fceaf24a | 509 | |
5a71ae30 | 510 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 511 | if (!net_device) |
ff2bd69a | 512 | return -ENODEV; |
2ddd5e5f | 513 | ndev = net_device->ndev; |
fceaf24a | 514 | |
53d21fdb | 515 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 516 | if (packet->is_data_pkt) { |
21a80820 | 517 | /* 0 is RMC_DATA; */ |
53d21fdb | 518 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
519 | } else { |
520 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 521 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 522 | } |
fceaf24a | 523 | |
454f18a9 | 524 | /* Not using send buffer section */ |
53d21fdb HZ |
525 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
526 | 0xFFFFFFFF; | |
527 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 528 | |
f1ea3cd7 | 529 | if (packet->completion.send.send_completion) |
00ca8f0c | 530 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
531 | else |
532 | req_id = 0; | |
533 | ||
72a2f5bd | 534 | if (packet->page_buf_cnt) { |
85799a37 | 535 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
536 | packet->page_buf, |
537 | packet->page_buf_cnt, | |
ff3f8eec GKH |
538 | &sendMessage, |
539 | sizeof(struct nvsp_message), | |
f1ea3cd7 | 540 | req_id); |
21a80820 | 541 | } else { |
85799a37 | 542 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
e4d59ac5 | 543 | sizeof(struct nvsp_message), |
f1ea3cd7 | 544 | req_id, |
e4d59ac5 HZ |
545 | VM_PKT_DATA_INBAND, |
546 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
547 | } |
548 | ||
1d06825b HZ |
549 | if (ret == 0) { |
550 | atomic_inc(&net_device->num_outstanding_sends); | |
33be96e4 HZ |
551 | if (hv_ringbuf_avail_percent(&device->channel->outbound) < |
552 | RING_AVAIL_PERCENT_LOWATER) { | |
553 | netif_stop_queue(ndev); | |
554 | if (atomic_read(&net_device-> | |
555 | num_outstanding_sends) < 1) | |
556 | netif_wake_queue(ndev); | |
557 | } | |
1d06825b HZ |
558 | } else if (ret == -EAGAIN) { |
559 | netif_stop_queue(ndev); | |
33be96e4 | 560 | if (atomic_read(&net_device->num_outstanding_sends) < 1) { |
1d06825b | 561 | netif_wake_queue(ndev); |
33be96e4 HZ |
562 | ret = -ENOSPC; |
563 | } | |
1d06825b | 564 | } else { |
d9871158 | 565 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 566 | packet, ret); |
1d06825b | 567 | } |
fceaf24a | 568 | |
fceaf24a HJ |
569 | return ret; |
570 | } | |
571 | ||
5fa9d3c5 | 572 | static void netvsc_send_recv_completion(struct hv_device *device, |
97c1723a | 573 | struct netvsc_device *net_device, |
63f6921d | 574 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
575 | { |
576 | struct nvsp_message recvcompMessage; | |
577 | int retries = 0; | |
578 | int ret; | |
2ddd5e5f | 579 | struct net_device *ndev; |
2ddd5e5f S |
580 | |
581 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
582 | |
583 | recvcompMessage.hdr.msg_type = | |
584 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
585 | ||
63f6921d | 586 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
587 | |
588 | retry_send_cmplt: | |
589 | /* Send the completion */ | |
590 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, | |
591 | sizeof(struct nvsp_message), transaction_id, | |
592 | VM_PKT_COMP, 0); | |
593 | if (ret == 0) { | |
594 | /* success */ | |
595 | /* no-op */ | |
d2598f01 | 596 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
597 | /* no more room...wait a bit and attempt to retry 3 times */ |
598 | retries++; | |
d9871158 | 599 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 600 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
601 | |
602 | if (retries < 4) { | |
603 | udelay(100); | |
604 | goto retry_send_cmplt; | |
605 | } else { | |
d9871158 | 606 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 607 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
608 | transaction_id); |
609 | } | |
610 | } else { | |
d9871158 | 611 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 612 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
613 | } |
614 | } | |
615 | ||
57991156 HZ |
616 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
617 | static void netvsc_receive_completion(void *context) | |
618 | { | |
619 | struct hv_netvsc_packet *packet = context; | |
c2fd03a0 | 620 | struct hv_device *device = packet->device; |
57991156 HZ |
621 | struct netvsc_device *net_device; |
622 | u64 transaction_id = 0; | |
623 | bool fsend_receive_comp = false; | |
624 | unsigned long flags; | |
2ddd5e5f | 625 | struct net_device *ndev; |
63f6921d | 626 | u32 status = NVSP_STAT_NONE; |
57991156 HZ |
627 | |
628 | /* | |
629 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
630 | * send out receive completion, we are using GetInboundNetDevice() | |
631 | * since we may have disable outbound traffic already. | |
632 | */ | |
633 | net_device = get_inbound_net_device(device); | |
2ddd5e5f | 634 | if (!net_device) |
57991156 | 635 | return; |
2ddd5e5f | 636 | ndev = net_device->ndev; |
57991156 HZ |
637 | |
638 | /* Overloading use of the lock. */ | |
639 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
640 | ||
63f6921d HZ |
641 | if (packet->status != NVSP_STAT_SUCCESS) |
642 | packet->xfer_page_pkt->status = NVSP_STAT_FAIL; | |
643 | ||
57991156 HZ |
644 | packet->xfer_page_pkt->count--; |
645 | ||
646 | /* | |
647 | * Last one in the line that represent 1 xfer page packet. | |
648 | * Return the xfer page packet itself to the freelist | |
649 | */ | |
650 | if (packet->xfer_page_pkt->count == 0) { | |
651 | fsend_receive_comp = true; | |
652 | transaction_id = packet->completion.recv.recv_completion_tid; | |
63f6921d | 653 | status = packet->xfer_page_pkt->status; |
57991156 HZ |
654 | list_add_tail(&packet->xfer_page_pkt->list_ent, |
655 | &net_device->recv_pkt_list); | |
656 | ||
657 | } | |
658 | ||
659 | /* Put the packet back */ | |
660 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
661 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
662 | ||
663 | /* Send a receive completion for the xfer page packet */ | |
664 | if (fsend_receive_comp) | |
97c1723a KS |
665 | netvsc_send_recv_completion(device, net_device, transaction_id, |
666 | status); | |
57991156 | 667 | |
57991156 HZ |
668 | } |
669 | ||
97c1723a KS |
670 | static void netvsc_receive(struct netvsc_device *net_device, |
671 | struct hv_device *device, | |
672 | struct vmpacket_descriptor *packet) | |
fceaf24a | 673 | { |
85799a37 HZ |
674 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
675 | struct nvsp_message *nvsp_packet; | |
676 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
7e23a6e9 | 677 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 678 | struct xferpage_packet *xferpage_packet = NULL; |
45326342 HZ |
679 | int i; |
680 | int count = 0; | |
6436873a | 681 | unsigned long flags; |
2ddd5e5f | 682 | struct net_device *ndev; |
779b4d17 | 683 | |
d29274ef | 684 | LIST_HEAD(listHead); |
fceaf24a | 685 | |
2ddd5e5f | 686 | ndev = net_device->ndev; |
fceaf24a | 687 | |
21a80820 GKH |
688 | /* |
689 | * All inbound packets other than send completion should be xfer page | |
690 | * packet | |
691 | */ | |
415f2287 | 692 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 693 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 694 | packet->type); |
fceaf24a HJ |
695 | return; |
696 | } | |
697 | ||
85799a37 | 698 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 699 | (packet->offset8 << 3)); |
fceaf24a | 700 | |
454f18a9 | 701 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
702 | if (nvsp_packet->hdr.msg_type != |
703 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 704 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 705 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
706 | return; |
707 | } | |
708 | ||
85799a37 | 709 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 710 | |
415f2287 | 711 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 712 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 713 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 714 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
715 | return; |
716 | } | |
717 | ||
454f18a9 BP |
718 | /* |
719 | * Grab free packets (range count + 1) to represent this xfer | |
720 | * page packet. +1 to represent the xfer page packet itself. | |
721 | * We grab it here so that we know exactly how many we can | |
722 | * fulfil | |
723 | */ | |
53d21fdb HZ |
724 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
725 | while (!list_empty(&net_device->recv_pkt_list)) { | |
726 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 727 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
728 | break; |
729 | } | |
53d21fdb | 730 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 731 | |
454f18a9 BP |
732 | /* |
733 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
734 | * page and at least 1 for the range) i.e. we can handled | |
735 | * some of the xfer page packet ranges... | |
736 | */ | |
21a80820 | 737 | if (count < 2) { |
d9871158 | 738 | netdev_err(ndev, "Got only %d netvsc pkt...needed " |
c909ebbd | 739 | "%d pkts. Dropping this xfer page packet completely!\n", |
eb335bc4 | 740 | count, vmxferpage_packet->range_cnt + 1); |
fceaf24a | 741 | |
454f18a9 | 742 | /* Return it to the freelist */ |
53d21fdb | 743 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 744 | for (i = count; i != 0; i--) { |
92ec0893 | 745 | list_move_tail(listHead.next, |
53d21fdb | 746 | &net_device->recv_pkt_list); |
fceaf24a | 747 | } |
53d21fdb | 748 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 749 | flags); |
fceaf24a | 750 | |
97c1723a | 751 | netvsc_send_recv_completion(device, net_device, |
63f6921d HZ |
752 | vmxferpage_packet->d.trans_id, |
753 | NVSP_STAT_FAIL); | |
fceaf24a | 754 | |
fceaf24a HJ |
755 | return; |
756 | } | |
757 | ||
454f18a9 | 758 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 759 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 760 | list_del(&xferpage_packet->list_ent); |
63f6921d | 761 | xferpage_packet->status = NVSP_STAT_SUCCESS; |
d29274ef | 762 | |
21a80820 | 763 | /* This is how much we can satisfy */ |
72a2f5bd | 764 | xferpage_packet->count = count - 1; |
21a80820 | 765 | |
415f2287 | 766 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
8bff33ab | 767 | netdev_err(ndev, "Needed %d netvsc pkts to satisfy " |
c909ebbd | 768 | "this xfer page...got %d\n", |
eb335bc4 | 769 | vmxferpage_packet->range_cnt, xferpage_packet->count); |
fceaf24a HJ |
770 | } |
771 | ||
454f18a9 | 772 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 773 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 774 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 775 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 776 | |
454f18a9 | 777 | /* Initialize the netvsc packet */ |
63f6921d | 778 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
72a2f5bd HZ |
779 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
780 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 781 | netvsc_receive_completion; |
72a2f5bd | 782 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 783 | netvsc_packet; |
72a2f5bd | 784 | netvsc_packet->device = device; |
21a80820 | 785 | /* Save this so that we can send it back */ |
72a2f5bd | 786 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 787 | vmxferpage_packet->d.trans_id; |
fceaf24a | 788 | |
45326342 HZ |
789 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
790 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 791 | netvsc_packet->total_data_buflen = |
415f2287 | 792 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 793 | |
454f18a9 | 794 | /* Pass it to the upper layer */ |
ac6f7859 | 795 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 796 | |
5a71ae30 | 797 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 798 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
799 | } |
800 | ||
fceaf24a HJ |
801 | } |
802 | ||
5a71ae30 | 803 | static void netvsc_channel_cb(void *context) |
fceaf24a | 804 | { |
21a80820 | 805 | int ret; |
85799a37 HZ |
806 | struct hv_device *device = context; |
807 | struct netvsc_device *net_device; | |
808 | u32 bytes_recvd; | |
809 | u64 request_id; | |
8dc0a06a | 810 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
811 | unsigned char *buffer; |
812 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 813 | struct net_device *ndev; |
fceaf24a | 814 | |
5a71ae30 | 815 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 816 | if (!net_device) |
ee0c4c39 | 817 | return; |
2ddd5e5f | 818 | ndev = net_device->ndev; |
ee0c4c39 | 819 | buffer = net_device->cb_buffer; |
fceaf24a | 820 | |
21a80820 | 821 | do { |
9f630068 | 822 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 823 | &bytes_recvd, &request_id); |
21a80820 | 824 | if (ret == 0) { |
85799a37 | 825 | if (bytes_recvd > 0) { |
21a80820 | 826 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
827 | switch (desc->type) { |
828 | case VM_PKT_COMP: | |
97c1723a KS |
829 | netvsc_send_completion(net_device, |
830 | device, desc); | |
21a80820 GKH |
831 | break; |
832 | ||
415f2287 | 833 | case VM_PKT_DATA_USING_XFER_PAGES: |
97c1723a KS |
834 | netvsc_receive(net_device, |
835 | device, desc); | |
21a80820 GKH |
836 | break; |
837 | ||
838 | default: | |
d9871158 | 839 | netdev_err(ndev, |
21a80820 GKH |
840 | "unhandled packet type %d, " |
841 | "tid %llx len %d\n", | |
415f2287 | 842 | desc->type, request_id, |
85799a37 | 843 | bytes_recvd); |
21a80820 | 844 | break; |
fceaf24a HJ |
845 | } |
846 | ||
21a80820 | 847 | } else { |
ee0c4c39 KS |
848 | /* |
849 | * We are done for this pass. | |
850 | */ | |
fceaf24a HJ |
851 | break; |
852 | } | |
ee0c4c39 | 853 | |
3d5cad97 | 854 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
855 | if (bufferlen > NETVSC_PACKET_SIZE) |
856 | kfree(buffer); | |
21a80820 | 857 | /* Handle large packet */ |
85799a37 | 858 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 859 | if (buffer == NULL) { |
454f18a9 | 860 | /* Try again next time around */ |
d9871158 | 861 | netdev_err(ndev, |
21a80820 | 862 | "unable to allocate buffer of size " |
c909ebbd | 863 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
864 | break; |
865 | } | |
866 | ||
85799a37 | 867 | bufferlen = bytes_recvd; |
fceaf24a HJ |
868 | } |
869 | } while (1); | |
870 | ||
ee0c4c39 KS |
871 | if (bufferlen > NETVSC_PACKET_SIZE) |
872 | kfree(buffer); | |
fceaf24a HJ |
873 | return; |
874 | } | |
af24ce42 | 875 | |
b637e023 HZ |
876 | /* |
877 | * netvsc_device_add - Callback when the device belonging to this | |
878 | * driver is added | |
879 | */ | |
7bd23a4d | 880 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
881 | { |
882 | int ret = 0; | |
883 | int i; | |
aae23986 S |
884 | int ring_size = |
885 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
886 | struct netvsc_device *net_device; |
887 | struct hv_netvsc_packet *packet, *pos; | |
2ddd5e5f | 888 | struct net_device *ndev; |
b637e023 HZ |
889 | |
890 | net_device = alloc_net_device(device); | |
891 | if (!net_device) { | |
ace163a8 | 892 | ret = -ENOMEM; |
b637e023 HZ |
893 | goto cleanup; |
894 | } | |
895 | ||
2ddd5e5f S |
896 | /* |
897 | * Coming into this function, struct net_device * is | |
898 | * registered as the driver private data. | |
899 | * In alloc_net_device(), we register struct netvsc_device * | |
900 | * as the driver private data and stash away struct net_device * | |
901 | * in struct netvsc_device *. | |
902 | */ | |
903 | ndev = net_device->ndev; | |
904 | ||
b637e023 | 905 | /* Initialize the NetVSC channel extension */ |
b637e023 HZ |
906 | spin_lock_init(&net_device->recv_pkt_list_lock); |
907 | ||
b637e023 HZ |
908 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
909 | ||
910 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
6562640b | 911 | packet = kzalloc(sizeof(struct hv_netvsc_packet), GFP_KERNEL); |
b637e023 HZ |
912 | if (!packet) |
913 | break; | |
914 | ||
915 | list_add_tail(&packet->list_ent, | |
916 | &net_device->recv_pkt_list); | |
917 | } | |
35abb21a | 918 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
919 | |
920 | /* Open the channel */ | |
aae23986 S |
921 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
922 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
923 | netvsc_channel_cb, device); |
924 | ||
925 | if (ret != 0) { | |
d9871158 | 926 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
927 | goto cleanup; |
928 | } | |
929 | ||
930 | /* Channel is opened */ | |
c909ebbd | 931 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 HZ |
932 | |
933 | /* Connect with the NetVsp */ | |
934 | ret = netvsc_connect_vsp(device); | |
935 | if (ret != 0) { | |
d9871158 | 936 | netdev_err(ndev, |
c909ebbd | 937 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
938 | goto close; |
939 | } | |
940 | ||
941 | return ret; | |
942 | ||
943 | close: | |
944 | /* Now, we can close the channel safely */ | |
945 | vmbus_close(device->channel); | |
946 | ||
947 | cleanup: | |
948 | ||
949 | if (net_device) { | |
950 | list_for_each_entry_safe(packet, pos, | |
951 | &net_device->recv_pkt_list, | |
952 | list_ent) { | |
953 | list_del(&packet->list_ent); | |
954 | kfree(packet); | |
955 | } | |
956 | ||
356c4657 | 957 | kfree(net_device); |
b637e023 HZ |
958 | } |
959 | ||
960 | return ret; | |
961 | } |