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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> |
d6472302 | 31 | #include <linux/vmalloc.h> |
c25aaf81 | 32 | #include <asm/sync_bitops.h> |
3f335ea2 | 33 | |
5ca7252a | 34 | #include "hyperv_net.h" |
fceaf24a | 35 | |
84bf9cef KS |
36 | /* |
37 | * Switch the data path from the synthetic interface to the VF | |
38 | * interface. | |
39 | */ | |
0a1275ca | 40 | void netvsc_switch_datapath(struct net_device *ndev, bool vf) |
84bf9cef | 41 | { |
3d541ac5 VK |
42 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
43 | struct hv_device *dev = net_device_ctx->device_ctx; | |
0a1275ca VK |
44 | struct netvsc_device *nv_dev = net_device_ctx->nvdev; |
45 | struct nvsp_message *init_pkt = &nv_dev->channel_init_pkt; | |
84bf9cef KS |
46 | |
47 | memset(init_pkt, 0, sizeof(struct nvsp_message)); | |
48 | init_pkt->hdr.msg_type = NVSP_MSG4_TYPE_SWITCH_DATA_PATH; | |
49 | if (vf) | |
50 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
51 | NVSP_DATAPATH_VF; | |
52 | else | |
53 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
54 | NVSP_DATAPATH_SYNTHETIC; | |
55 | ||
56 | vmbus_sendpacket(dev->channel, init_pkt, | |
57 | sizeof(struct nvsp_message), | |
58 | (unsigned long)init_pkt, | |
59 | VM_PKT_DATA_INBAND, 0); | |
60 | } | |
61 | ||
88098834 | 62 | static struct netvsc_device *alloc_net_device(void) |
fceaf24a | 63 | { |
85799a37 | 64 | struct netvsc_device *net_device; |
fceaf24a | 65 | |
85799a37 HZ |
66 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
67 | if (!net_device) | |
fceaf24a HJ |
68 | return NULL; |
69 | ||
b8b835a8 | 70 | net_device->chan_table[0].mrc.buf |
71 | = vzalloc(NETVSC_RECVSLOT_MAX * sizeof(struct recv_comp_data)); | |
c0b558e5 | 72 | |
dc5cd894 | 73 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 74 | net_device->destroy = false; |
84bf9cef | 75 | atomic_set(&net_device->open_cnt, 0); |
7c3877f2 HZ |
76 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
77 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
fd612602 | 78 | init_completion(&net_device->channel_init_wait); |
7c3877f2 | 79 | |
85799a37 | 80 | return net_device; |
fceaf24a HJ |
81 | } |
82 | ||
545a8e79 | 83 | static void free_netvsc_device(struct rcu_head *head) |
f90251c8 | 84 | { |
545a8e79 | 85 | struct netvsc_device *nvdev |
86 | = container_of(head, struct netvsc_device, rcu); | |
c0b558e5 HZ |
87 | int i; |
88 | ||
89 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
b8b835a8 | 90 | vfree(nvdev->chan_table[i].mrc.buf); |
c0b558e5 | 91 | |
f90251c8 HZ |
92 | kfree(nvdev); |
93 | } | |
94 | ||
545a8e79 | 95 | static void free_netvsc_device_rcu(struct netvsc_device *nvdev) |
96 | { | |
97 | call_rcu(&nvdev->rcu, free_netvsc_device); | |
98 | } | |
fceaf24a | 99 | |
46b4f7f5 | 100 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 101 | { |
2625466d | 102 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
9d88f33a | 103 | |
46b4f7f5 | 104 | if (net_device && net_device->destroy) |
85799a37 | 105 | net_device = NULL; |
fceaf24a | 106 | |
85799a37 | 107 | return net_device; |
fceaf24a HJ |
108 | } |
109 | ||
7a2a0a84 | 110 | static void netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
111 | { |
112 | struct nvsp_message *revoke_packet; | |
3d541ac5 | 113 | struct net_device *ndev = hv_get_drvdata(device); |
2625466d | 114 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); |
7a2a0a84 | 115 | int ret; |
ec91cd09 HZ |
116 | |
117 | /* | |
118 | * If we got a section count, it means we received a | |
119 | * SendReceiveBufferComplete msg (ie sent | |
120 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
121 | * to send a revoke msg here | |
122 | */ | |
123 | if (net_device->recv_section_cnt) { | |
124 | /* Send the revoke receive buffer */ | |
125 | revoke_packet = &net_device->revoke_packet; | |
126 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
127 | ||
128 | revoke_packet->hdr.msg_type = | |
129 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
130 | revoke_packet->msg.v1_msg. | |
131 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
132 | ||
3d541ac5 | 133 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
134 | revoke_packet, |
135 | sizeof(struct nvsp_message), | |
136 | (unsigned long)revoke_packet, | |
137 | VM_PKT_DATA_INBAND, 0); | |
73e64fa4 S |
138 | /* If the failure is because the channel is rescinded; |
139 | * ignore the failure since we cannot send on a rescinded | |
140 | * channel. This would allow us to properly cleanup | |
141 | * even when the channel is rescinded. | |
142 | */ | |
143 | if (device->channel->rescind) | |
144 | ret = 0; | |
ec91cd09 HZ |
145 | /* |
146 | * If we failed here, we might as well return and | |
147 | * have a leak rather than continue and a bugchk | |
148 | */ | |
149 | if (ret != 0) { | |
d9871158 | 150 | netdev_err(ndev, "unable to send " |
c909ebbd | 151 | "revoke receive buffer to netvsp\n"); |
7a2a0a84 | 152 | return; |
ec91cd09 HZ |
153 | } |
154 | } | |
155 | ||
156 | /* Teardown the gpadl on the vsp end */ | |
157 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
158 | ret = vmbus_teardown_gpadl(device->channel, |
159 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
160 | |
161 | /* If we failed here, we might as well return and have a leak | |
162 | * rather than continue and a bugchk | |
163 | */ | |
164 | if (ret != 0) { | |
d9871158 | 165 | netdev_err(ndev, |
c909ebbd | 166 | "unable to teardown receive buffer's gpadl\n"); |
7a2a0a84 | 167 | return; |
ec91cd09 HZ |
168 | } |
169 | net_device->recv_buf_gpadl_handle = 0; | |
170 | } | |
171 | ||
172 | if (net_device->recv_buf) { | |
173 | /* Free up the receive buffer */ | |
b679ef73 | 174 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
175 | net_device->recv_buf = NULL; |
176 | } | |
177 | ||
178 | if (net_device->recv_section) { | |
179 | net_device->recv_section_cnt = 0; | |
180 | kfree(net_device->recv_section); | |
181 | net_device->recv_section = NULL; | |
182 | } | |
183 | ||
c25aaf81 KS |
184 | /* Deal with the send buffer we may have setup. |
185 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
186 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
187 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
188 | * to send a revoke msg here |
189 | */ | |
190 | if (net_device->send_section_size) { | |
191 | /* Send the revoke receive buffer */ | |
192 | revoke_packet = &net_device->revoke_packet; | |
193 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
194 | ||
195 | revoke_packet->hdr.msg_type = | |
196 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
197 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
198 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 199 | |
3d541ac5 | 200 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
201 | revoke_packet, |
202 | sizeof(struct nvsp_message), | |
203 | (unsigned long)revoke_packet, | |
204 | VM_PKT_DATA_INBAND, 0); | |
73e64fa4 S |
205 | |
206 | /* If the failure is because the channel is rescinded; | |
207 | * ignore the failure since we cannot send on a rescinded | |
208 | * channel. This would allow us to properly cleanup | |
209 | * even when the channel is rescinded. | |
210 | */ | |
211 | if (device->channel->rescind) | |
212 | ret = 0; | |
213 | ||
c25aaf81 KS |
214 | /* If we failed here, we might as well return and |
215 | * have a leak rather than continue and a bugchk | |
216 | */ | |
217 | if (ret != 0) { | |
218 | netdev_err(ndev, "unable to send " | |
219 | "revoke send buffer to netvsp\n"); | |
7a2a0a84 | 220 | return; |
c25aaf81 KS |
221 | } |
222 | } | |
223 | /* Teardown the gpadl on the vsp end */ | |
224 | if (net_device->send_buf_gpadl_handle) { | |
3d541ac5 | 225 | ret = vmbus_teardown_gpadl(device->channel, |
c25aaf81 KS |
226 | net_device->send_buf_gpadl_handle); |
227 | ||
228 | /* If we failed here, we might as well return and have a leak | |
229 | * rather than continue and a bugchk | |
230 | */ | |
231 | if (ret != 0) { | |
232 | netdev_err(ndev, | |
233 | "unable to teardown send buffer's gpadl\n"); | |
7a2a0a84 | 234 | return; |
c25aaf81 | 235 | } |
2f18423d | 236 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
237 | } |
238 | if (net_device->send_buf) { | |
c51ed182 | 239 | /* Free up the send buffer */ |
06b47aac | 240 | vfree(net_device->send_buf); |
c25aaf81 KS |
241 | net_device->send_buf = NULL; |
242 | } | |
243 | kfree(net_device->send_section_map); | |
ec91cd09 HZ |
244 | } |
245 | ||
c25aaf81 | 246 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 247 | { |
21a80820 | 248 | int ret = 0; |
85799a37 HZ |
249 | struct netvsc_device *net_device; |
250 | struct nvsp_message *init_packet; | |
2ddd5e5f | 251 | struct net_device *ndev; |
fdfb70d2 | 252 | size_t map_words; |
0a726c2b | 253 | int node; |
fceaf24a | 254 | |
5a71ae30 | 255 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 256 | if (!net_device) |
927bc33c | 257 | return -ENODEV; |
0a1275ca | 258 | ndev = hv_get_drvdata(device); |
fceaf24a | 259 | |
0a726c2b S |
260 | node = cpu_to_node(device->channel->target_cpu); |
261 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
262 | if (!net_device->recv_buf) | |
263 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
264 | ||
53d21fdb | 265 | if (!net_device->recv_buf) { |
d9871158 | 266 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 267 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 268 | ret = -ENOMEM; |
0c3b7b2f | 269 | goto cleanup; |
fceaf24a | 270 | } |
fceaf24a | 271 | |
454f18a9 BP |
272 | /* |
273 | * Establish the gpadl handle for this buffer on this | |
274 | * channel. Note: This call uses the vmbus connection rather | |
275 | * than the channel to establish the gpadl handle. | |
276 | */ | |
53d21fdb HZ |
277 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
278 | net_device->recv_buf_size, | |
279 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 280 | if (ret != 0) { |
d9871158 | 281 | netdev_err(ndev, |
c909ebbd | 282 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 283 | goto cleanup; |
fceaf24a HJ |
284 | } |
285 | ||
454f18a9 | 286 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 287 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 288 | |
85799a37 | 289 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 290 | |
53d21fdb HZ |
291 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
292 | init_packet->msg.v1_msg.send_recv_buf. | |
293 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
294 | init_packet->msg.v1_msg. | |
295 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 296 | |
454f18a9 | 297 | /* Send the gpadl notification request */ |
85799a37 | 298 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 299 | sizeof(struct nvsp_message), |
85799a37 | 300 | (unsigned long)init_packet, |
415f2287 | 301 | VM_PKT_DATA_INBAND, |
5a4df290 | 302 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 303 | if (ret != 0) { |
d9871158 | 304 | netdev_err(ndev, |
c909ebbd | 305 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 306 | goto cleanup; |
fceaf24a HJ |
307 | } |
308 | ||
5362855a | 309 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 310 | |
454f18a9 | 311 | /* Check the response */ |
53d21fdb HZ |
312 | if (init_packet->msg.v1_msg. |
313 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 314 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 315 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
316 | init_packet->msg.v1_msg. |
317 | send_recv_buf_complete.status); | |
927bc33c | 318 | ret = -EINVAL; |
0c3b7b2f | 319 | goto cleanup; |
fceaf24a HJ |
320 | } |
321 | ||
454f18a9 | 322 | /* Parse the response */ |
fceaf24a | 323 | |
53d21fdb HZ |
324 | net_device->recv_section_cnt = init_packet->msg. |
325 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 326 | |
c1813200 HZ |
327 | net_device->recv_section = kmemdup( |
328 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
329 | net_device->recv_section_cnt * | |
330 | sizeof(struct nvsp_1_receive_buffer_section), | |
331 | GFP_KERNEL); | |
53d21fdb | 332 | if (net_device->recv_section == NULL) { |
927bc33c | 333 | ret = -EINVAL; |
0c3b7b2f | 334 | goto cleanup; |
fceaf24a HJ |
335 | } |
336 | ||
21a80820 GKH |
337 | /* |
338 | * For 1st release, there should only be 1 section that represents the | |
339 | * entire receive buffer | |
340 | */ | |
53d21fdb HZ |
341 | if (net_device->recv_section_cnt != 1 || |
342 | net_device->recv_section->offset != 0) { | |
927bc33c | 343 | ret = -EINVAL; |
0c3b7b2f | 344 | goto cleanup; |
fceaf24a HJ |
345 | } |
346 | ||
c25aaf81 KS |
347 | /* Now setup the send buffer. |
348 | */ | |
5defde59 S |
349 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
350 | if (!net_device->send_buf) | |
351 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
352 | if (!net_device->send_buf) { |
353 | netdev_err(ndev, "unable to allocate send " | |
354 | "buffer of size %d\n", net_device->send_buf_size); | |
355 | ret = -ENOMEM; | |
356 | goto cleanup; | |
357 | } | |
358 | ||
359 | /* Establish the gpadl handle for this buffer on this | |
360 | * channel. Note: This call uses the vmbus connection rather | |
361 | * than the channel to establish the gpadl handle. | |
362 | */ | |
363 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
364 | net_device->send_buf_size, | |
365 | &net_device->send_buf_gpadl_handle); | |
366 | if (ret != 0) { | |
367 | netdev_err(ndev, | |
368 | "unable to establish send buffer's gpadl\n"); | |
369 | goto cleanup; | |
370 | } | |
371 | ||
372 | /* Notify the NetVsp of the gpadl handle */ | |
373 | init_packet = &net_device->channel_init_pkt; | |
374 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
375 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 376 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 377 | net_device->send_buf_gpadl_handle; |
c51ed182 | 378 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
379 | |
380 | /* Send the gpadl notification request */ | |
381 | ret = vmbus_sendpacket(device->channel, init_packet, | |
382 | sizeof(struct nvsp_message), | |
383 | (unsigned long)init_packet, | |
384 | VM_PKT_DATA_INBAND, | |
385 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
386 | if (ret != 0) { | |
387 | netdev_err(ndev, | |
388 | "unable to send send buffer's gpadl to netvsp\n"); | |
389 | goto cleanup; | |
390 | } | |
391 | ||
5362855a | 392 | wait_for_completion(&net_device->channel_init_wait); |
c25aaf81 KS |
393 | |
394 | /* Check the response */ | |
395 | if (init_packet->msg.v1_msg. | |
396 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
397 | netdev_err(ndev, "Unable to complete send buffer " | |
398 | "initialization with NetVsp - status %d\n", | |
399 | init_packet->msg.v1_msg. | |
c51ed182 | 400 | send_send_buf_complete.status); |
c25aaf81 KS |
401 | ret = -EINVAL; |
402 | goto cleanup; | |
403 | } | |
404 | ||
405 | /* Parse the response */ | |
406 | net_device->send_section_size = init_packet->msg. | |
407 | v1_msg.send_send_buf_complete.section_size; | |
408 | ||
409 | /* Section count is simply the size divided by the section size. | |
410 | */ | |
411 | net_device->send_section_cnt = | |
796cc88c | 412 | net_device->send_buf_size / net_device->send_section_size; |
c25aaf81 | 413 | |
93ba2222 VK |
414 | netdev_dbg(ndev, "Send section size: %d, Section count:%d\n", |
415 | net_device->send_section_size, net_device->send_section_cnt); | |
c25aaf81 KS |
416 | |
417 | /* Setup state for managing the send buffer. */ | |
fdfb70d2 | 418 | map_words = DIV_ROUND_UP(net_device->send_section_cnt, BITS_PER_LONG); |
c25aaf81 | 419 | |
fdfb70d2 | 420 | net_device->send_section_map = kcalloc(map_words, sizeof(ulong), GFP_KERNEL); |
dd1d3f8f WY |
421 | if (net_device->send_section_map == NULL) { |
422 | ret = -ENOMEM; | |
c25aaf81 | 423 | goto cleanup; |
dd1d3f8f | 424 | } |
c25aaf81 | 425 | |
0c3b7b2f | 426 | goto exit; |
fceaf24a | 427 | |
0c3b7b2f | 428 | cleanup: |
3d541ac5 | 429 | netvsc_destroy_buf(device); |
fceaf24a | 430 | |
0c3b7b2f | 431 | exit: |
fceaf24a HJ |
432 | return ret; |
433 | } | |
434 | ||
f157e78d HZ |
435 | /* Negotiate NVSP protocol version */ |
436 | static int negotiate_nvsp_ver(struct hv_device *device, | |
437 | struct netvsc_device *net_device, | |
438 | struct nvsp_message *init_packet, | |
439 | u32 nvsp_ver) | |
fceaf24a | 440 | { |
0a1275ca | 441 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c | 442 | int ret; |
fceaf24a | 443 | |
85799a37 | 444 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 445 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
446 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
447 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 448 | |
454f18a9 | 449 | /* Send the init request */ |
85799a37 | 450 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 451 | sizeof(struct nvsp_message), |
85799a37 | 452 | (unsigned long)init_packet, |
415f2287 | 453 | VM_PKT_DATA_INBAND, |
5a4df290 | 454 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 455 | |
b8a3d52b | 456 | if (ret != 0) |
f157e78d | 457 | return ret; |
fceaf24a | 458 | |
5362855a | 459 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 460 | |
53d21fdb | 461 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
462 | NVSP_STAT_SUCCESS) |
463 | return -EINVAL; | |
fceaf24a | 464 | |
a1eabb01 | 465 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
466 | return 0; |
467 | ||
71790a27 | 468 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
469 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
470 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 471 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 472 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 473 | |
7f5d5af0 | 474 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) { |
71790a27 HZ |
475 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
476 | ||
7f5d5af0 HZ |
477 | /* Teaming bit is needed to receive link speed updates */ |
478 | init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1; | |
479 | } | |
480 | ||
f157e78d HZ |
481 | ret = vmbus_sendpacket(device->channel, init_packet, |
482 | sizeof(struct nvsp_message), | |
483 | (unsigned long)init_packet, | |
484 | VM_PKT_DATA_INBAND, 0); | |
485 | ||
486 | return ret; | |
487 | } | |
488 | ||
489 | static int netvsc_connect_vsp(struct hv_device *device) | |
490 | { | |
491 | int ret; | |
492 | struct netvsc_device *net_device; | |
493 | struct nvsp_message *init_packet; | |
494 | int ndis_version; | |
e5a78fad SH |
495 | const u32 ver_list[] = { |
496 | NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, | |
a1eabb01 | 497 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; |
e5a78fad | 498 | int i; |
f157e78d HZ |
499 | |
500 | net_device = get_outbound_net_device(device); | |
501 | if (!net_device) | |
502 | return -ENODEV; | |
f157e78d HZ |
503 | |
504 | init_packet = &net_device->channel_init_pkt; | |
505 | ||
506 | /* Negotiate the latest NVSP protocol supported */ | |
e5a78fad | 507 | for (i = ARRAY_SIZE(ver_list) - 1; i >= 0; i--) |
a1eabb01 HZ |
508 | if (negotiate_nvsp_ver(device, net_device, init_packet, |
509 | ver_list[i]) == 0) { | |
510 | net_device->nvsp_version = ver_list[i]; | |
511 | break; | |
512 | } | |
513 | ||
514 | if (i < 0) { | |
0f48c72c | 515 | ret = -EPROTO; |
0c3b7b2f | 516 | goto cleanup; |
fceaf24a | 517 | } |
f157e78d HZ |
518 | |
519 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
520 | ||
454f18a9 | 521 | /* Send the ndis version */ |
85799a37 | 522 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 523 | |
a1eabb01 | 524 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 525 | ndis_version = 0x00060001; |
a1eabb01 HZ |
526 | else |
527 | ndis_version = 0x0006001e; | |
fceaf24a | 528 | |
53d21fdb HZ |
529 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
530 | init_packet->msg.v1_msg. | |
531 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 532 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
533 | init_packet->msg.v1_msg. |
534 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 535 | ndis_version & 0xFFFF; |
fceaf24a | 536 | |
454f18a9 | 537 | /* Send the init request */ |
85799a37 | 538 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
539 | sizeof(struct nvsp_message), |
540 | (unsigned long)init_packet, | |
541 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 542 | if (ret != 0) |
0c3b7b2f | 543 | goto cleanup; |
454f18a9 BP |
544 | |
545 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
546 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
547 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
548 | else | |
549 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 550 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 551 | |
c25aaf81 | 552 | ret = netvsc_init_buf(device); |
fceaf24a | 553 | |
0c3b7b2f | 554 | cleanup: |
fceaf24a HJ |
555 | return ret; |
556 | } | |
557 | ||
3d541ac5 | 558 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 559 | { |
3d541ac5 | 560 | netvsc_destroy_buf(device); |
fceaf24a HJ |
561 | } |
562 | ||
3e189519 | 563 | /* |
5a71ae30 | 564 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 565 | */ |
e08f3ea5 | 566 | void netvsc_device_remove(struct hv_device *device) |
fceaf24a | 567 | { |
3d541ac5 VK |
568 | struct net_device *ndev = hv_get_drvdata(device); |
569 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
570 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
15a863bf | 571 | int i; |
fceaf24a | 572 | |
3d541ac5 | 573 | netvsc_disconnect_vsp(device); |
9d88f33a | 574 | |
545a8e79 | 575 | RCU_INIT_POINTER(net_device_ctx->nvdev, NULL); |
3852409b | 576 | |
86c921af S |
577 | /* |
578 | * At this point, no one should be accessing net_device | |
579 | * except in here | |
580 | */ | |
93ba2222 | 581 | netdev_dbg(ndev, "net device safe to remove\n"); |
fceaf24a | 582 | |
454f18a9 | 583 | /* Now, we can close the channel safely */ |
85799a37 | 584 | vmbus_close(device->channel); |
fceaf24a | 585 | |
76bb5db5 | 586 | /* And dissassociate NAPI context from device */ |
79cd874c | 587 | for (i = 0; i < net_device->num_chn; i++) |
76bb5db5 | 588 | netif_napi_del(&net_device->chan_table[i].napi); |
15a863bf | 589 | |
454f18a9 | 590 | /* Release all resources */ |
545a8e79 | 591 | free_netvsc_device_rcu(net_device); |
fceaf24a HJ |
592 | } |
593 | ||
33be96e4 HZ |
594 | #define RING_AVAIL_PERCENT_HIWATER 20 |
595 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
596 | ||
597 | /* | |
598 | * Get the percentage of available bytes to write in the ring. | |
599 | * The return value is in range from 0 to 100. | |
600 | */ | |
601 | static inline u32 hv_ringbuf_avail_percent( | |
602 | struct hv_ring_buffer_info *ring_info) | |
603 | { | |
604 | u32 avail_read, avail_write; | |
605 | ||
606 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
607 | ||
608 | return avail_write * 100 / ring_info->ring_datasize; | |
609 | } | |
610 | ||
c25aaf81 KS |
611 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
612 | u32 index) | |
613 | { | |
614 | sync_change_bit(index, net_device->send_section_map); | |
615 | } | |
616 | ||
bc304dd3 SH |
617 | static void netvsc_send_tx_complete(struct netvsc_device *net_device, |
618 | struct vmbus_channel *incoming_channel, | |
619 | struct hv_device *device, | |
f9645430 | 620 | const struct vmpacket_descriptor *desc, |
621 | int budget) | |
bc304dd3 | 622 | { |
50698d80 | 623 | struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id; |
bc304dd3 | 624 | struct net_device *ndev = hv_get_drvdata(device); |
bc304dd3 | 625 | struct vmbus_channel *channel = device->channel; |
bc304dd3 SH |
626 | u16 q_idx = 0; |
627 | int queue_sends; | |
628 | ||
629 | /* Notify the layer above us */ | |
630 | if (likely(skb)) { | |
793e3955 | 631 | const struct hv_netvsc_packet *packet |
bc304dd3 | 632 | = (struct hv_netvsc_packet *)skb->cb; |
793e3955 | 633 | u32 send_index = packet->send_buf_index; |
634 | struct netvsc_stats *tx_stats; | |
bc304dd3 SH |
635 | |
636 | if (send_index != NETVSC_INVALID_INDEX) | |
637 | netvsc_free_send_slot(net_device, send_index); | |
793e3955 | 638 | q_idx = packet->q_idx; |
bc304dd3 SH |
639 | channel = incoming_channel; |
640 | ||
6c80f3fc | 641 | tx_stats = &net_device->chan_table[q_idx].tx_stats; |
793e3955 | 642 | |
643 | u64_stats_update_begin(&tx_stats->syncp); | |
644 | tx_stats->packets += packet->total_packets; | |
645 | tx_stats->bytes += packet->total_bytes; | |
646 | u64_stats_update_end(&tx_stats->syncp); | |
647 | ||
f9645430 | 648 | napi_consume_skb(skb, budget); |
bc304dd3 SH |
649 | } |
650 | ||
b8b835a8 | 651 | queue_sends = |
652 | atomic_dec_return(&net_device->chan_table[q_idx].queue_sends); | |
bc304dd3 | 653 | |
46b4f7f5 | 654 | if (net_device->destroy && queue_sends == 0) |
bc304dd3 SH |
655 | wake_up(&net_device->wait_drain); |
656 | ||
657 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && | |
bc304dd3 SH |
658 | (hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER || |
659 | queue_sends < 1)) | |
660 | netif_tx_wake_queue(netdev_get_tx_queue(ndev, q_idx)); | |
661 | } | |
662 | ||
97c1723a | 663 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 664 | struct vmbus_channel *incoming_channel, |
97c1723a | 665 | struct hv_device *device, |
f9645430 | 666 | const struct vmpacket_descriptor *desc, |
667 | int budget) | |
fceaf24a | 668 | { |
f3dd3f47 | 669 | struct nvsp_message *nvsp_packet = hv_pkt_data(desc); |
3d541ac5 | 670 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 671 | |
bc304dd3 SH |
672 | switch (nvsp_packet->hdr.msg_type) { |
673 | case NVSP_MSG_TYPE_INIT_COMPLETE: | |
674 | case NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE: | |
675 | case NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE: | |
676 | case NVSP_MSG5_TYPE_SUBCHANNEL: | |
454f18a9 | 677 | /* Copy the response back */ |
53d21fdb | 678 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 679 | sizeof(struct nvsp_message)); |
35abb21a | 680 | complete(&net_device->channel_init_wait); |
bc304dd3 SH |
681 | break; |
682 | ||
683 | case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: | |
684 | netvsc_send_tx_complete(net_device, incoming_channel, | |
f9645430 | 685 | device, desc, budget); |
bc304dd3 | 686 | break; |
fceaf24a | 687 | |
bc304dd3 SH |
688 | default: |
689 | netdev_err(ndev, | |
690 | "Unknown send completion type %d received!!\n", | |
691 | nvsp_packet->hdr.msg_type); | |
fceaf24a | 692 | } |
fceaf24a HJ |
693 | } |
694 | ||
c25aaf81 KS |
695 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
696 | { | |
b58a1858 | 697 | unsigned long *map_addr = net_device->send_section_map; |
698 | unsigned int i; | |
699 | ||
fdfb70d2 | 700 | for_each_clear_bit(i, map_addr, net_device->send_section_cnt) { |
b58a1858 | 701 | if (sync_test_and_set_bit(i, map_addr) == 0) |
702 | return i; | |
c25aaf81 | 703 | } |
b58a1858 | 704 | |
705 | return NETVSC_INVALID_INDEX; | |
c25aaf81 KS |
706 | } |
707 | ||
da19fcd0 LP |
708 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
709 | unsigned int section_index, | |
7c3877f2 | 710 | u32 pend_size, |
24476760 | 711 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 712 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
713 | struct hv_page_buffer **pb, |
714 | struct sk_buff *skb) | |
c25aaf81 KS |
715 | { |
716 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
717 | char *dest = start + (section_index * net_device->send_section_size) |
718 | + pend_size; | |
c25aaf81 KS |
719 | int i; |
720 | u32 msg_size = 0; | |
7c3877f2 HZ |
721 | u32 padding = 0; |
722 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
723 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
724 | packet->page_buf_cnt; | |
7c3877f2 HZ |
725 | |
726 | /* Add padding */ | |
ebc1dcf6 | 727 | if (skb->xmit_more && remain && !packet->cp_partial) { |
7c3877f2 | 728 | padding = net_device->pkt_align - remain; |
24476760 | 729 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
730 | packet->total_data_buflen += padding; |
731 | } | |
c25aaf81 | 732 | |
aa0a34be | 733 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
734 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
735 | u32 offset = (*pb)[i].offset; | |
736 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
737 | |
738 | memcpy(dest, (src + offset), len); | |
739 | msg_size += len; | |
740 | dest += len; | |
741 | } | |
7c3877f2 HZ |
742 | |
743 | if (padding) { | |
744 | memset(dest, 0, padding); | |
745 | msg_size += padding; | |
746 | } | |
747 | ||
c25aaf81 KS |
748 | return msg_size; |
749 | } | |
750 | ||
3a8963ac | 751 | static inline int netvsc_send_pkt( |
0a1275ca | 752 | struct hv_device *device, |
7c3877f2 | 753 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 754 | struct netvsc_device *net_device, |
3a3d9a0a KS |
755 | struct hv_page_buffer **pb, |
756 | struct sk_buff *skb) | |
fceaf24a | 757 | { |
7c3877f2 | 758 | struct nvsp_message nvmsg; |
b8b835a8 | 759 | struct netvsc_channel *nvchan |
760 | = &net_device->chan_table[packet->q_idx]; | |
761 | struct vmbus_channel *out_channel = nvchan->channel; | |
0a1275ca | 762 | struct net_device *ndev = hv_get_drvdata(device); |
b8b835a8 | 763 | struct netdev_queue *txq = netdev_get_tx_queue(ndev, packet->q_idx); |
7c3877f2 HZ |
764 | u64 req_id; |
765 | int ret; | |
aa0a34be | 766 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 767 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
c25aaf81 | 768 | |
7c3877f2 | 769 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 770 | if (skb != NULL) { |
21a80820 | 771 | /* 0 is RMC_DATA; */ |
7c3877f2 | 772 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
773 | } else { |
774 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 775 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 776 | } |
fceaf24a | 777 | |
7c3877f2 HZ |
778 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
779 | packet->send_buf_index; | |
780 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
781 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
782 | else | |
783 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
784 | packet->total_data_buflen; | |
21a80820 | 785 | |
3a3d9a0a | 786 | req_id = (ulong)skb; |
f1ea3cd7 | 787 | |
c3582a2c HZ |
788 | if (out_channel->rescind) |
789 | return -ENODEV; | |
790 | ||
72a2f5bd | 791 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
792 | pgbuf = packet->cp_partial ? (*pb) + |
793 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
794 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
795 | pgbuf, | |
796 | packet->page_buf_cnt, | |
797 | &nvmsg, | |
798 | sizeof(struct nvsp_message), | |
799 | req_id, | |
3454323c | 800 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 801 | } else { |
82fa3c77 KS |
802 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
803 | sizeof(struct nvsp_message), | |
804 | req_id, | |
805 | VM_PKT_DATA_INBAND, | |
3454323c | 806 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
fceaf24a HJ |
807 | } |
808 | ||
1d06825b | 809 | if (ret == 0) { |
b8b835a8 | 810 | atomic_inc_return(&nvchan->queue_sends); |
5b54dac8 | 811 | |
46b4f7f5 | 812 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) |
b8b835a8 | 813 | netif_tx_stop_queue(txq); |
1d06825b | 814 | } else if (ret == -EAGAIN) { |
b8b835a8 | 815 | netif_tx_stop_queue(txq); |
816 | if (atomic_read(&nvchan->queue_sends) < 1) { | |
817 | netif_tx_wake_queue(txq); | |
33be96e4 HZ |
818 | ret = -ENOSPC; |
819 | } | |
1d06825b | 820 | } else { |
d9871158 | 821 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 822 | packet, ret); |
1d06825b | 823 | } |
fceaf24a | 824 | |
7c3877f2 HZ |
825 | return ret; |
826 | } | |
827 | ||
c85e4924 HZ |
828 | /* Move packet out of multi send data (msd), and clear msd */ |
829 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
830 | struct sk_buff **msd_skb, | |
831 | struct multi_send_data *msdp) | |
832 | { | |
833 | *msd_skb = msdp->skb; | |
834 | *msd_send = msdp->pkt; | |
835 | msdp->skb = NULL; | |
836 | msdp->pkt = NULL; | |
837 | msdp->count = 0; | |
838 | } | |
839 | ||
7c3877f2 | 840 | int netvsc_send(struct hv_device *device, |
24476760 | 841 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 842 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
843 | struct hv_page_buffer **pb, |
844 | struct sk_buff *skb) | |
7c3877f2 HZ |
845 | { |
846 | struct netvsc_device *net_device; | |
6c4c137e | 847 | int ret = 0; |
b8b835a8 | 848 | struct netvsc_channel *nvchan; |
7c3877f2 HZ |
849 | u32 pktlen = packet->total_data_buflen, msd_len = 0; |
850 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
851 | struct multi_send_data *msdp; |
852 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 853 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 854 | bool try_batch; |
bde79be5 | 855 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
856 | |
857 | net_device = get_outbound_net_device(device); | |
858 | if (!net_device) | |
859 | return -ENODEV; | |
860 | ||
e8f0a89c VK |
861 | /* We may race with netvsc_connect_vsp()/netvsc_init_buf() and get |
862 | * here before the negotiation with the host is finished and | |
863 | * send_section_map may not be allocated yet. | |
864 | */ | |
865 | if (!net_device->send_section_map) | |
866 | return -EAGAIN; | |
867 | ||
b8b835a8 | 868 | nvchan = &net_device->chan_table[packet->q_idx]; |
7c3877f2 | 869 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 870 | packet->cp_partial = false; |
7c3877f2 | 871 | |
cf8190e4 HZ |
872 | /* Send control message directly without accessing msd (Multi-Send |
873 | * Data) field which may be changed during data packet processing. | |
874 | */ | |
875 | if (!skb) { | |
876 | cur_send = packet; | |
877 | goto send_now; | |
878 | } | |
879 | ||
7c3877f2 | 880 | /* batch packets in send buffer if possible */ |
b8b835a8 | 881 | msdp = &nvchan->msd; |
7c3877f2 HZ |
882 | if (msdp->pkt) |
883 | msd_len = msdp->pkt->total_data_buflen; | |
884 | ||
ebc1dcf6 | 885 | try_batch = msd_len > 0 && msdp->count < net_device->max_pkt; |
aa0a34be | 886 | if (try_batch && msd_len + pktlen + net_device->pkt_align < |
7c3877f2 HZ |
887 | net_device->send_section_size) { |
888 | section_index = msdp->pkt->send_buf_index; | |
889 | ||
aa0a34be HZ |
890 | } else if (try_batch && msd_len + packet->rmsg_size < |
891 | net_device->send_section_size) { | |
892 | section_index = msdp->pkt->send_buf_index; | |
893 | packet->cp_partial = true; | |
894 | ||
ebc1dcf6 | 895 | } else if (pktlen + net_device->pkt_align < |
7c3877f2 HZ |
896 | net_device->send_section_size) { |
897 | section_index = netvsc_get_next_send_section(net_device); | |
898 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
899 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
900 | msd_len = 0; | |
7c3877f2 HZ |
901 | } |
902 | } | |
903 | ||
904 | if (section_index != NETVSC_INVALID_INDEX) { | |
905 | netvsc_copy_to_send_buf(net_device, | |
906 | section_index, msd_len, | |
694a9fb0 | 907 | packet, rndis_msg, pb, skb); |
b08cc791 | 908 | |
7c3877f2 | 909 | packet->send_buf_index = section_index; |
aa0a34be HZ |
910 | |
911 | if (packet->cp_partial) { | |
912 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
913 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
914 | } else { | |
915 | packet->page_buf_cnt = 0; | |
916 | packet->total_data_buflen += msd_len; | |
aa0a34be | 917 | } |
7c3877f2 | 918 | |
793e3955 | 919 | if (msdp->pkt) { |
920 | packet->total_packets += msdp->pkt->total_packets; | |
921 | packet->total_bytes += msdp->pkt->total_bytes; | |
922 | } | |
923 | ||
c85e4924 | 924 | if (msdp->skb) |
17db4bce | 925 | dev_consume_skb_any(msdp->skb); |
ee90b812 | 926 | |
bde79be5 | 927 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 928 | msdp->skb = skb; |
7c3877f2 HZ |
929 | msdp->pkt = packet; |
930 | msdp->count++; | |
931 | } else { | |
932 | cur_send = packet; | |
c85e4924 | 933 | msdp->skb = NULL; |
7c3877f2 HZ |
934 | msdp->pkt = NULL; |
935 | msdp->count = 0; | |
936 | } | |
937 | } else { | |
c85e4924 | 938 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
939 | cur_send = packet; |
940 | } | |
941 | ||
7c3877f2 | 942 | if (msd_send) { |
6c4c137e SH |
943 | int m_ret = netvsc_send_pkt(device, msd_send, net_device, |
944 | NULL, msd_skb); | |
7c3877f2 HZ |
945 | |
946 | if (m_ret != 0) { | |
947 | netvsc_free_send_slot(net_device, | |
948 | msd_send->send_buf_index); | |
c85e4924 | 949 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
950 | } |
951 | } | |
952 | ||
cf8190e4 | 953 | send_now: |
7c3877f2 | 954 | if (cur_send) |
0a1275ca | 955 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 956 | |
7aab5159 JS |
957 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
958 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 959 | |
fceaf24a HJ |
960 | return ret; |
961 | } | |
962 | ||
c0b558e5 HZ |
963 | static int netvsc_send_recv_completion(struct vmbus_channel *channel, |
964 | u64 transaction_id, u32 status) | |
5fa9d3c5 HZ |
965 | { |
966 | struct nvsp_message recvcompMessage; | |
5fa9d3c5 HZ |
967 | int ret; |
968 | ||
969 | recvcompMessage.hdr.msg_type = | |
970 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
971 | ||
63f6921d | 972 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 | 973 | |
5fa9d3c5 | 974 | /* Send the completion */ |
5b54dac8 | 975 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
c0b558e5 HZ |
976 | sizeof(struct nvsp_message_header) + sizeof(u32), |
977 | transaction_id, VM_PKT_COMP, 0); | |
978 | ||
979 | return ret; | |
980 | } | |
981 | ||
982 | static inline void count_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx, | |
983 | u32 *filled, u32 *avail) | |
984 | { | |
b8b835a8 | 985 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
986 | u32 first = mrc->first; | |
987 | u32 next = mrc->next; | |
c0b558e5 HZ |
988 | |
989 | *filled = (first > next) ? NETVSC_RECVSLOT_MAX - first + next : | |
990 | next - first; | |
991 | ||
992 | *avail = NETVSC_RECVSLOT_MAX - *filled - 1; | |
993 | } | |
994 | ||
995 | /* Read the first filled slot, no change to index */ | |
996 | static inline struct recv_comp_data *read_recv_comp_slot(struct netvsc_device | |
997 | *nvdev, u16 q_idx) | |
998 | { | |
b8b835a8 | 999 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1000 | u32 filled, avail; |
1001 | ||
b8b835a8 | 1002 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
1003 | return NULL; |
1004 | ||
1005 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1006 | if (!filled) | |
1007 | return NULL; | |
1008 | ||
b8b835a8 | 1009 | return mrc->buf + mrc->first * sizeof(struct recv_comp_data); |
c0b558e5 HZ |
1010 | } |
1011 | ||
1012 | /* Put the first filled slot back to available pool */ | |
1013 | static inline void put_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx) | |
1014 | { | |
b8b835a8 | 1015 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1016 | int num_recv; |
1017 | ||
b8b835a8 | 1018 | mrc->first = (mrc->first + 1) % NETVSC_RECVSLOT_MAX; |
c0b558e5 HZ |
1019 | |
1020 | num_recv = atomic_dec_return(&nvdev->num_outstanding_recvs); | |
1021 | ||
1022 | if (nvdev->destroy && num_recv == 0) | |
1023 | wake_up(&nvdev->wait_drain); | |
1024 | } | |
1025 | ||
1026 | /* Check and send pending recv completions */ | |
1027 | static void netvsc_chk_recv_comp(struct netvsc_device *nvdev, | |
1028 | struct vmbus_channel *channel, u16 q_idx) | |
1029 | { | |
1030 | struct recv_comp_data *rcd; | |
1031 | int ret; | |
1032 | ||
1033 | while (true) { | |
1034 | rcd = read_recv_comp_slot(nvdev, q_idx); | |
1035 | if (!rcd) | |
1036 | break; | |
1037 | ||
1038 | ret = netvsc_send_recv_completion(channel, rcd->tid, | |
1039 | rcd->status); | |
1040 | if (ret) | |
1041 | break; | |
1042 | ||
1043 | put_recv_comp_slot(nvdev, q_idx); | |
5fa9d3c5 HZ |
1044 | } |
1045 | } | |
1046 | ||
c0b558e5 HZ |
1047 | #define NETVSC_RCD_WATERMARK 80 |
1048 | ||
1049 | /* Get next available slot */ | |
1050 | static inline struct recv_comp_data *get_recv_comp_slot( | |
1051 | struct netvsc_device *nvdev, struct vmbus_channel *channel, u16 q_idx) | |
1052 | { | |
b8b835a8 | 1053 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1054 | u32 filled, avail, next; |
1055 | struct recv_comp_data *rcd; | |
1056 | ||
b8b835a8 | 1057 | if (unlikely(!nvdev->recv_section)) |
c0b558e5 HZ |
1058 | return NULL; |
1059 | ||
b8b835a8 | 1060 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
1061 | return NULL; |
1062 | ||
1063 | if (atomic_read(&nvdev->num_outstanding_recvs) > | |
1064 | nvdev->recv_section->num_sub_allocs * NETVSC_RCD_WATERMARK / 100) | |
1065 | netvsc_chk_recv_comp(nvdev, channel, q_idx); | |
1066 | ||
1067 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1068 | if (!avail) | |
1069 | return NULL; | |
1070 | ||
b8b835a8 | 1071 | next = mrc->next; |
1072 | rcd = mrc->buf + next * sizeof(struct recv_comp_data); | |
1073 | mrc->next = (next + 1) % NETVSC_RECVSLOT_MAX; | |
c0b558e5 HZ |
1074 | |
1075 | atomic_inc(&nvdev->num_outstanding_recvs); | |
1076 | ||
1077 | return rcd; | |
1078 | } | |
1079 | ||
15a863bf | 1080 | static int netvsc_receive(struct net_device *ndev, |
dc54a08c | 1081 | struct netvsc_device *net_device, |
1082 | struct net_device_context *net_device_ctx, | |
1083 | struct hv_device *device, | |
1084 | struct vmbus_channel *channel, | |
f3dd3f47 | 1085 | const struct vmpacket_descriptor *desc, |
dc54a08c | 1086 | struct nvsp_message *nvsp) |
fceaf24a | 1087 | { |
f3dd3f47 | 1088 | const struct vmtransfer_page_packet_header *vmxferpage_packet |
1089 | = container_of(desc, const struct vmtransfer_page_packet_header, d); | |
15a863bf | 1090 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
dc54a08c | 1091 | char *recv_buf = net_device->recv_buf; |
4baab261 | 1092 | u32 status = NVSP_STAT_SUCCESS; |
45326342 HZ |
1093 | int i; |
1094 | int count = 0; | |
c0b558e5 | 1095 | int ret; |
779b4d17 | 1096 | |
454f18a9 | 1097 | /* Make sure this is a valid nvsp packet */ |
dc54a08c | 1098 | if (unlikely(nvsp->hdr.msg_type != NVSP_MSG1_TYPE_SEND_RNDIS_PKT)) { |
1099 | netif_err(net_device_ctx, rx_err, ndev, | |
1100 | "Unknown nvsp packet type received %u\n", | |
1101 | nvsp->hdr.msg_type); | |
15a863bf | 1102 | return 0; |
fceaf24a HJ |
1103 | } |
1104 | ||
dc54a08c | 1105 | if (unlikely(vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID)) { |
1106 | netif_err(net_device_ctx, rx_err, ndev, | |
1107 | "Invalid xfer page set id - expecting %x got %x\n", | |
1108 | NETVSC_RECEIVE_BUFFER_ID, | |
1109 | vmxferpage_packet->xfer_pageset_id); | |
15a863bf | 1110 | return 0; |
fceaf24a HJ |
1111 | } |
1112 | ||
4baab261 | 1113 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1114 | |
454f18a9 | 1115 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1116 | for (i = 0; i < count; i++) { |
dc54a08c | 1117 | void *data = recv_buf |
1118 | + vmxferpage_packet->ranges[i].byte_offset; | |
1119 | u32 buflen = vmxferpage_packet->ranges[i].byte_count; | |
fceaf24a | 1120 | |
454f18a9 | 1121 | /* Pass it to the upper layer */ |
dc54a08c | 1122 | status = rndis_filter_receive(ndev, net_device, device, |
1123 | channel, data, buflen); | |
fceaf24a HJ |
1124 | } |
1125 | ||
15a863bf | 1126 | if (net_device->chan_table[q_idx].mrc.buf) { |
1127 | struct recv_comp_data *rcd; | |
1128 | ||
1129 | rcd = get_recv_comp_slot(net_device, channel, q_idx); | |
1130 | if (rcd) { | |
1131 | rcd->tid = vmxferpage_packet->d.trans_id; | |
1132 | rcd->status = status; | |
1133 | } else { | |
1134 | netdev_err(ndev, "Recv_comp full buf q:%hd, tid:%llx\n", | |
1135 | q_idx, vmxferpage_packet->d.trans_id); | |
1136 | } | |
1137 | } else { | |
c0b558e5 HZ |
1138 | ret = netvsc_send_recv_completion(channel, |
1139 | vmxferpage_packet->d.trans_id, | |
1140 | status); | |
1141 | if (ret) | |
1142 | netdev_err(ndev, "Recv_comp q:%hd, tid:%llx, err:%d\n", | |
1143 | q_idx, vmxferpage_packet->d.trans_id, ret); | |
c0b558e5 | 1144 | } |
15a863bf | 1145 | return count; |
fceaf24a HJ |
1146 | } |
1147 | ||
5b54dac8 | 1148 | static void netvsc_send_table(struct hv_device *hdev, |
71790a27 | 1149 | struct nvsp_message *nvmsg) |
5b54dac8 | 1150 | { |
0a1275ca | 1151 | struct net_device *ndev = hv_get_drvdata(hdev); |
7ce10124 | 1152 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
5b54dac8 HZ |
1153 | int i; |
1154 | u32 count, *tab; | |
1155 | ||
5b54dac8 HZ |
1156 | count = nvmsg->msg.v5_msg.send_table.count; |
1157 | if (count != VRSS_SEND_TAB_SIZE) { | |
1158 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1159 | return; | |
1160 | } | |
1161 | ||
1162 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1163 | nvmsg->msg.v5_msg.send_table.offset); | |
1164 | ||
1165 | for (i = 0; i < count; i++) | |
7ce10124 | 1166 | net_device_ctx->tx_send_table[i] = tab[i]; |
5b54dac8 HZ |
1167 | } |
1168 | ||
f9a7da91 | 1169 | static void netvsc_send_vf(struct net_device_context *net_device_ctx, |
71790a27 HZ |
1170 | struct nvsp_message *nvmsg) |
1171 | { | |
f9a7da91 VK |
1172 | net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
1173 | net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
71790a27 HZ |
1174 | } |
1175 | ||
1176 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
f9a7da91 VK |
1177 | struct net_device_context *net_device_ctx, |
1178 | struct nvsp_message *nvmsg) | |
71790a27 HZ |
1179 | { |
1180 | switch (nvmsg->hdr.msg_type) { | |
1181 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1182 | netvsc_send_table(hdev, nvmsg); | |
1183 | break; | |
1184 | ||
1185 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
f9a7da91 | 1186 | netvsc_send_vf(net_device_ctx, nvmsg); |
71790a27 HZ |
1187 | break; |
1188 | } | |
1189 | } | |
1190 | ||
15a863bf | 1191 | static int netvsc_process_raw_pkt(struct hv_device *device, |
1192 | struct vmbus_channel *channel, | |
1193 | struct netvsc_device *net_device, | |
1194 | struct net_device *ndev, | |
f9645430 | 1195 | const struct vmpacket_descriptor *desc, |
1196 | int budget) | |
99a50bb1 | 1197 | { |
f9a7da91 | 1198 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
f3dd3f47 | 1199 | struct nvsp_message *nvmsg = hv_pkt_data(desc); |
99a50bb1 S |
1200 | |
1201 | switch (desc->type) { | |
1202 | case VM_PKT_COMP: | |
f9645430 | 1203 | netvsc_send_completion(net_device, channel, device, |
1204 | desc, budget); | |
99a50bb1 S |
1205 | break; |
1206 | ||
1207 | case VM_PKT_DATA_USING_XFER_PAGES: | |
15a863bf | 1208 | return netvsc_receive(ndev, net_device, net_device_ctx, |
1209 | device, channel, desc, nvmsg); | |
99a50bb1 S |
1210 | break; |
1211 | ||
1212 | case VM_PKT_DATA_INBAND: | |
f9a7da91 | 1213 | netvsc_receive_inband(device, net_device_ctx, nvmsg); |
99a50bb1 S |
1214 | break; |
1215 | ||
1216 | default: | |
1217 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", | |
f4f1c23d | 1218 | desc->type, desc->trans_id); |
99a50bb1 S |
1219 | break; |
1220 | } | |
15a863bf | 1221 | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | static struct hv_device *netvsc_channel_to_device(struct vmbus_channel *channel) | |
1226 | { | |
1227 | struct vmbus_channel *primary = channel->primary_channel; | |
1228 | ||
1229 | return primary ? primary->device_obj : channel->device_obj; | |
1230 | } | |
1231 | ||
262b7f14 | 1232 | /* Network processing softirq |
1233 | * Process data in incoming ring buffer from host | |
1234 | * Stops when ring is empty or budget is met or exceeded. | |
1235 | */ | |
15a863bf | 1236 | int netvsc_poll(struct napi_struct *napi, int budget) |
1237 | { | |
1238 | struct netvsc_channel *nvchan | |
1239 | = container_of(napi, struct netvsc_channel, napi); | |
1240 | struct vmbus_channel *channel = nvchan->channel; | |
1241 | struct hv_device *device = netvsc_channel_to_device(channel); | |
1242 | u16 q_idx = channel->offermsg.offer.sub_channel_index; | |
1243 | struct net_device *ndev = hv_get_drvdata(device); | |
1244 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); | |
15a863bf | 1245 | int work_done = 0; |
1246 | ||
f4f1c23d | 1247 | /* If starting a new interval */ |
1248 | if (!nvchan->desc) | |
1249 | nvchan->desc = hv_pkt_iter_first(channel); | |
15a863bf | 1250 | |
f4f1c23d | 1251 | while (nvchan->desc && work_done < budget) { |
1252 | work_done += netvsc_process_raw_pkt(device, channel, net_device, | |
f9645430 | 1253 | ndev, nvchan->desc, budget); |
f4f1c23d | 1254 | nvchan->desc = hv_pkt_iter_next(channel, nvchan->desc); |
15a863bf | 1255 | } |
15a863bf | 1256 | |
f4f1c23d | 1257 | /* If receive ring was exhausted |
1258 | * and not doing busy poll | |
262b7f14 | 1259 | * then re-enable host interrupts |
1260 | * and reschedule if ring is not empty. | |
1261 | */ | |
15a863bf | 1262 | if (work_done < budget && |
1263 | napi_complete_done(napi, work_done) && | |
1264 | hv_end_read(&channel->inbound) != 0) | |
1265 | napi_reschedule(napi); | |
1266 | ||
1267 | netvsc_chk_recv_comp(net_device, channel, q_idx); | |
f4f1c23d | 1268 | |
1269 | /* Driver may overshoot since multiple packets per descriptor */ | |
1270 | return min(work_done, budget); | |
99a50bb1 S |
1271 | } |
1272 | ||
262b7f14 | 1273 | /* Call back when data is available in host ring buffer. |
1274 | * Processing is deferred until network softirq (NAPI) | |
1275 | */ | |
5b54dac8 | 1276 | void netvsc_channel_cb(void *context) |
fceaf24a | 1277 | { |
6de38af6 | 1278 | struct netvsc_channel *nvchan = context; |
0b307ebd | 1279 | |
f4f1c23d | 1280 | if (napi_schedule_prep(&nvchan->napi)) { |
1281 | /* disable interupts from host */ | |
1282 | hv_begin_read(&nvchan->channel->inbound); | |
0d6dd357 | 1283 | |
f4f1c23d | 1284 | __napi_schedule(&nvchan->napi); |
1285 | } | |
fceaf24a | 1286 | } |
af24ce42 | 1287 | |
b637e023 HZ |
1288 | /* |
1289 | * netvsc_device_add - Callback when the device belonging to this | |
1290 | * driver is added | |
1291 | */ | |
2c7f83ca | 1292 | int netvsc_device_add(struct hv_device *device, |
1293 | const struct netvsc_device_info *device_info) | |
b637e023 | 1294 | { |
88098834 | 1295 | int i, ret = 0; |
2c7f83ca | 1296 | int ring_size = device_info->ring_size; |
b637e023 | 1297 | struct netvsc_device *net_device; |
88098834 VK |
1298 | struct net_device *ndev = hv_get_drvdata(device); |
1299 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1300 | |
88098834 | 1301 | net_device = alloc_net_device(); |
b1c84927 DC |
1302 | if (!net_device) |
1303 | return -ENOMEM; | |
b637e023 | 1304 | |
5b54dac8 HZ |
1305 | net_device->ring_size = ring_size; |
1306 | ||
15a863bf | 1307 | /* Because the device uses NAPI, all the interrupt batching and |
1308 | * control is done via Net softirq, not the channel handling | |
1309 | */ | |
1310 | set_channel_read_mode(device->channel, HV_CALL_ISR); | |
1311 | ||
bffb1842 S |
1312 | /* If we're reopening the device we may have multiple queues, fill the |
1313 | * chn_table with the default channel to use it before subchannels are | |
1314 | * opened. | |
1315 | * Initialize the channel state before we open; | |
1316 | * we can be interrupted as soon as we open the channel. | |
1317 | */ | |
1318 | ||
1319 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) { | |
1320 | struct netvsc_channel *nvchan = &net_device->chan_table[i]; | |
1321 | ||
1322 | nvchan->channel = device->channel; | |
bffb1842 S |
1323 | } |
1324 | ||
b637e023 | 1325 | /* Open the channel */ |
aae23986 S |
1326 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1327 | ring_size * PAGE_SIZE, NULL, 0, | |
6de38af6 | 1328 | netvsc_channel_cb, |
1329 | net_device->chan_table); | |
b637e023 HZ |
1330 | |
1331 | if (ret != 0) { | |
d9871158 | 1332 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1333 | goto cleanup; |
1334 | } | |
1335 | ||
1336 | /* Channel is opened */ | |
93ba2222 | 1337 | netdev_dbg(ndev, "hv_netvsc channel opened successfully\n"); |
b637e023 | 1338 | |
15a863bf | 1339 | /* Enable NAPI handler for init callbacks */ |
76bb5db5 | 1340 | netif_napi_add(ndev, &net_device->chan_table[0].napi, |
1341 | netvsc_poll, NAPI_POLL_WEIGHT); | |
15a863bf | 1342 | napi_enable(&net_device->chan_table[0].napi); |
88098834 VK |
1343 | |
1344 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is | |
1345 | * populated. | |
1346 | */ | |
545a8e79 | 1347 | rcu_assign_pointer(net_device_ctx->nvdev, net_device); |
5b54dac8 | 1348 | |
b637e023 HZ |
1349 | /* Connect with the NetVsp */ |
1350 | ret = netvsc_connect_vsp(device); | |
1351 | if (ret != 0) { | |
d9871158 | 1352 | netdev_err(ndev, |
c909ebbd | 1353 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1354 | goto close; |
1355 | } | |
1356 | ||
1357 | return ret; | |
1358 | ||
1359 | close: | |
76bb5db5 | 1360 | netif_napi_del(&net_device->chan_table[0].napi); |
15a863bf | 1361 | |
b637e023 HZ |
1362 | /* Now, we can close the channel safely */ |
1363 | vmbus_close(device->channel); | |
1364 | ||
1365 | cleanup: | |
545a8e79 | 1366 | free_netvsc_device(&net_device->rcu); |
b637e023 HZ |
1367 | |
1368 | return ret; | |
1369 | } |