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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 */ | |
5a71ae30 | 368 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 369 | |
0c3b7b2f | 370 | cleanup: |
fceaf24a HJ |
371 | return ret; |
372 | } | |
373 | ||
648dc598 | 374 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 375 | { |
5a71ae30 | 376 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
377 | } |
378 | ||
3e189519 | 379 | /* |
5a71ae30 | 380 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 381 | */ |
905620d1 | 382 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 383 | { |
85799a37 HZ |
384 | struct netvsc_device *net_device; |
385 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
c38b9c71 | 386 | unsigned long flags; |
fceaf24a | 387 | |
2ddd5e5f | 388 | net_device = hv_get_drvdata(device); |
fceaf24a | 389 | |
648dc598 | 390 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 391 | |
3852409b | 392 | /* |
9d88f33a S |
393 | * Since we have already drained, we don't need to busy wait |
394 | * as was done in final_release_stor_device() | |
395 | * Note that we cannot set the ext pointer to NULL until | |
396 | * we have drained - to drain the outgoing packets, we need to | |
397 | * allow incoming packets. | |
3852409b | 398 | */ |
9d88f33a S |
399 | |
400 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 401 | hv_set_drvdata(device, NULL); |
9d88f33a | 402 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 403 | |
86c921af S |
404 | /* |
405 | * At this point, no one should be accessing net_device | |
406 | * except in here | |
407 | */ | |
c909ebbd | 408 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 409 | |
454f18a9 | 410 | /* Now, we can close the channel safely */ |
85799a37 | 411 | vmbus_close(device->channel); |
fceaf24a | 412 | |
454f18a9 | 413 | /* Release all resources */ |
85799a37 | 414 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 415 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 416 | list_del(&netvsc_packet->list_ent); |
85799a37 | 417 | kfree(netvsc_packet); |
fceaf24a HJ |
418 | } |
419 | ||
356c4657 | 420 | kfree(net_device); |
21a80820 | 421 | return 0; |
fceaf24a HJ |
422 | } |
423 | ||
33be96e4 HZ |
424 | |
425 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
426 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
427 | ||
428 | /* | |
429 | * Get the percentage of available bytes to write in the ring. | |
430 | * The return value is in range from 0 to 100. | |
431 | */ | |
432 | static inline u32 hv_ringbuf_avail_percent( | |
433 | struct hv_ring_buffer_info *ring_info) | |
434 | { | |
435 | u32 avail_read, avail_write; | |
436 | ||
437 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
438 | ||
439 | return avail_write * 100 / ring_info->ring_datasize; | |
440 | } | |
441 | ||
97c1723a KS |
442 | static void netvsc_send_completion(struct netvsc_device *net_device, |
443 | struct hv_device *device, | |
85799a37 | 444 | struct vmpacket_descriptor *packet) |
fceaf24a | 445 | { |
85799a37 HZ |
446 | struct nvsp_message *nvsp_packet; |
447 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 448 | struct net_device *ndev; |
fceaf24a | 449 | |
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, |
97c1723a | 568 | struct netvsc_device *net_device, |
63f6921d | 569 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
570 | { |
571 | struct nvsp_message recvcompMessage; | |
572 | int retries = 0; | |
573 | int ret; | |
2ddd5e5f | 574 | struct net_device *ndev; |
2ddd5e5f S |
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) | |
97c1723a KS |
660 | netvsc_send_recv_completion(device, net_device, transaction_id, |
661 | status); | |
57991156 | 662 | |
57991156 HZ |
663 | } |
664 | ||
97c1723a KS |
665 | static void netvsc_receive(struct netvsc_device *net_device, |
666 | struct hv_device *device, | |
667 | struct vmpacket_descriptor *packet) | |
fceaf24a | 668 | { |
85799a37 HZ |
669 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
670 | struct nvsp_message *nvsp_packet; | |
671 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
7e23a6e9 | 672 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 673 | struct xferpage_packet *xferpage_packet = NULL; |
45326342 HZ |
674 | int i; |
675 | int count = 0; | |
6436873a | 676 | unsigned long flags; |
2ddd5e5f | 677 | struct net_device *ndev; |
779b4d17 | 678 | |
d29274ef | 679 | LIST_HEAD(listHead); |
fceaf24a | 680 | |
2ddd5e5f | 681 | ndev = net_device->ndev; |
fceaf24a | 682 | |
21a80820 GKH |
683 | /* |
684 | * All inbound packets other than send completion should be xfer page | |
685 | * packet | |
686 | */ | |
415f2287 | 687 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 688 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 689 | packet->type); |
fceaf24a HJ |
690 | return; |
691 | } | |
692 | ||
85799a37 | 693 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 694 | (packet->offset8 << 3)); |
fceaf24a | 695 | |
454f18a9 | 696 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
697 | if (nvsp_packet->hdr.msg_type != |
698 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 699 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 700 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
701 | return; |
702 | } | |
703 | ||
85799a37 | 704 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 705 | |
415f2287 | 706 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 707 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 708 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 709 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
710 | return; |
711 | } | |
712 | ||
454f18a9 BP |
713 | /* |
714 | * Grab free packets (range count + 1) to represent this xfer | |
715 | * page packet. +1 to represent the xfer page packet itself. | |
716 | * We grab it here so that we know exactly how many we can | |
717 | * fulfil | |
718 | */ | |
53d21fdb HZ |
719 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
720 | while (!list_empty(&net_device->recv_pkt_list)) { | |
721 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 722 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
723 | break; |
724 | } | |
53d21fdb | 725 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 726 | |
454f18a9 BP |
727 | /* |
728 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
729 | * page and at least 1 for the range) i.e. we can handled | |
730 | * some of the xfer page packet ranges... | |
731 | */ | |
21a80820 | 732 | if (count < 2) { |
d9871158 | 733 | netdev_err(ndev, "Got only %d netvsc pkt...needed " |
c909ebbd | 734 | "%d pkts. Dropping this xfer page packet completely!\n", |
eb335bc4 | 735 | count, vmxferpage_packet->range_cnt + 1); |
fceaf24a | 736 | |
454f18a9 | 737 | /* Return it to the freelist */ |
53d21fdb | 738 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 739 | for (i = count; i != 0; i--) { |
92ec0893 | 740 | list_move_tail(listHead.next, |
53d21fdb | 741 | &net_device->recv_pkt_list); |
fceaf24a | 742 | } |
53d21fdb | 743 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 744 | flags); |
fceaf24a | 745 | |
97c1723a | 746 | netvsc_send_recv_completion(device, net_device, |
63f6921d HZ |
747 | vmxferpage_packet->d.trans_id, |
748 | NVSP_STAT_FAIL); | |
fceaf24a | 749 | |
fceaf24a HJ |
750 | return; |
751 | } | |
752 | ||
454f18a9 | 753 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 754 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 755 | list_del(&xferpage_packet->list_ent); |
63f6921d | 756 | xferpage_packet->status = NVSP_STAT_SUCCESS; |
d29274ef | 757 | |
21a80820 | 758 | /* This is how much we can satisfy */ |
72a2f5bd | 759 | xferpage_packet->count = count - 1; |
21a80820 | 760 | |
415f2287 | 761 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
8bff33ab | 762 | netdev_err(ndev, "Needed %d netvsc pkts to satisfy " |
c909ebbd | 763 | "this xfer page...got %d\n", |
eb335bc4 | 764 | vmxferpage_packet->range_cnt, xferpage_packet->count); |
fceaf24a HJ |
765 | } |
766 | ||
454f18a9 | 767 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 768 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 769 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 770 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 771 | |
454f18a9 | 772 | /* Initialize the netvsc packet */ |
63f6921d | 773 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
72a2f5bd HZ |
774 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
775 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 776 | netvsc_receive_completion; |
72a2f5bd | 777 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 778 | netvsc_packet; |
72a2f5bd | 779 | netvsc_packet->device = device; |
21a80820 | 780 | /* Save this so that we can send it back */ |
72a2f5bd | 781 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 782 | vmxferpage_packet->d.trans_id; |
fceaf24a | 783 | |
45326342 HZ |
784 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
785 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 786 | netvsc_packet->total_data_buflen = |
415f2287 | 787 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 788 | |
454f18a9 | 789 | /* Pass it to the upper layer */ |
ac6f7859 | 790 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 791 | |
5a71ae30 | 792 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 793 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
794 | } |
795 | ||
fceaf24a HJ |
796 | } |
797 | ||
5a71ae30 | 798 | static void netvsc_channel_cb(void *context) |
fceaf24a | 799 | { |
21a80820 | 800 | int ret; |
85799a37 HZ |
801 | struct hv_device *device = context; |
802 | struct netvsc_device *net_device; | |
803 | u32 bytes_recvd; | |
804 | u64 request_id; | |
8dc0a06a | 805 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
806 | unsigned char *buffer; |
807 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 808 | struct net_device *ndev; |
fceaf24a | 809 | |
5a71ae30 | 810 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 811 | if (!net_device) |
ee0c4c39 | 812 | return; |
2ddd5e5f | 813 | ndev = net_device->ndev; |
ee0c4c39 | 814 | buffer = net_device->cb_buffer; |
fceaf24a | 815 | |
21a80820 | 816 | do { |
9f630068 | 817 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 818 | &bytes_recvd, &request_id); |
21a80820 | 819 | if (ret == 0) { |
85799a37 | 820 | if (bytes_recvd > 0) { |
21a80820 | 821 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
822 | switch (desc->type) { |
823 | case VM_PKT_COMP: | |
97c1723a KS |
824 | netvsc_send_completion(net_device, |
825 | device, desc); | |
21a80820 GKH |
826 | break; |
827 | ||
415f2287 | 828 | case VM_PKT_DATA_USING_XFER_PAGES: |
97c1723a KS |
829 | netvsc_receive(net_device, |
830 | device, desc); | |
21a80820 GKH |
831 | break; |
832 | ||
833 | default: | |
d9871158 | 834 | netdev_err(ndev, |
21a80820 GKH |
835 | "unhandled packet type %d, " |
836 | "tid %llx len %d\n", | |
415f2287 | 837 | desc->type, request_id, |
85799a37 | 838 | bytes_recvd); |
21a80820 | 839 | break; |
fceaf24a HJ |
840 | } |
841 | ||
21a80820 | 842 | } else { |
ee0c4c39 KS |
843 | /* |
844 | * We are done for this pass. | |
845 | */ | |
fceaf24a HJ |
846 | break; |
847 | } | |
ee0c4c39 | 848 | |
3d5cad97 | 849 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
850 | if (bufferlen > NETVSC_PACKET_SIZE) |
851 | kfree(buffer); | |
21a80820 | 852 | /* Handle large packet */ |
85799a37 | 853 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 854 | if (buffer == NULL) { |
454f18a9 | 855 | /* Try again next time around */ |
d9871158 | 856 | netdev_err(ndev, |
21a80820 | 857 | "unable to allocate buffer of size " |
c909ebbd | 858 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
859 | break; |
860 | } | |
861 | ||
85799a37 | 862 | bufferlen = bytes_recvd; |
fceaf24a HJ |
863 | } |
864 | } while (1); | |
865 | ||
ee0c4c39 KS |
866 | if (bufferlen > NETVSC_PACKET_SIZE) |
867 | kfree(buffer); | |
fceaf24a HJ |
868 | return; |
869 | } | |
af24ce42 | 870 | |
b637e023 HZ |
871 | /* |
872 | * netvsc_device_add - Callback when the device belonging to this | |
873 | * driver is added | |
874 | */ | |
7bd23a4d | 875 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
876 | { |
877 | int ret = 0; | |
878 | int i; | |
aae23986 S |
879 | int ring_size = |
880 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
881 | struct netvsc_device *net_device; |
882 | struct hv_netvsc_packet *packet, *pos; | |
2ddd5e5f | 883 | struct net_device *ndev; |
b637e023 HZ |
884 | |
885 | net_device = alloc_net_device(device); | |
886 | if (!net_device) { | |
ace163a8 | 887 | ret = -ENOMEM; |
b637e023 HZ |
888 | goto cleanup; |
889 | } | |
890 | ||
2ddd5e5f S |
891 | /* |
892 | * Coming into this function, struct net_device * is | |
893 | * registered as the driver private data. | |
894 | * In alloc_net_device(), we register struct netvsc_device * | |
895 | * as the driver private data and stash away struct net_device * | |
896 | * in struct netvsc_device *. | |
897 | */ | |
898 | ndev = net_device->ndev; | |
899 | ||
b637e023 HZ |
900 | /* Initialize the NetVSC channel extension */ |
901 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
902 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
903 | ||
b637e023 HZ |
904 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
905 | ||
906 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
6562640b | 907 | packet = kzalloc(sizeof(struct hv_netvsc_packet), GFP_KERNEL); |
b637e023 HZ |
908 | if (!packet) |
909 | break; | |
910 | ||
911 | list_add_tail(&packet->list_ent, | |
912 | &net_device->recv_pkt_list); | |
913 | } | |
35abb21a | 914 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
915 | |
916 | /* Open the channel */ | |
aae23986 S |
917 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
918 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
919 | netvsc_channel_cb, device); |
920 | ||
921 | if (ret != 0) { | |
d9871158 | 922 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
923 | goto cleanup; |
924 | } | |
925 | ||
926 | /* Channel is opened */ | |
c909ebbd | 927 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 HZ |
928 | |
929 | /* Connect with the NetVsp */ | |
930 | ret = netvsc_connect_vsp(device); | |
931 | if (ret != 0) { | |
d9871158 | 932 | netdev_err(ndev, |
c909ebbd | 933 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
934 | goto close; |
935 | } | |
936 | ||
937 | return ret; | |
938 | ||
939 | close: | |
940 | /* Now, we can close the channel safely */ | |
941 | vmbus_close(device->channel); | |
942 | ||
943 | cleanup: | |
944 | ||
945 | if (net_device) { | |
946 | list_for_each_entry_safe(packet, pos, | |
947 | &net_device->recv_pkt_list, | |
948 | list_ent) { | |
949 | list_del(&packet->list_ent); | |
950 | kfree(packet); | |
951 | } | |
952 | ||
356c4657 | 953 | kfree(net_device); |
b637e023 HZ |
954 | } |
955 | ||
956 | return ret; | |
957 | } |