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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> |
9749fed5 | 32 | #include <linux/rtnetlink.h> |
43bf99ce | 33 | #include <linux/prefetch.h> |
9749fed5 | 34 | |
c25aaf81 | 35 | #include <asm/sync_bitops.h> |
3f335ea2 | 36 | |
5ca7252a | 37 | #include "hyperv_net.h" |
fceaf24a | 38 | |
84bf9cef KS |
39 | /* |
40 | * Switch the data path from the synthetic interface to the VF | |
41 | * interface. | |
42 | */ | |
0a1275ca | 43 | void netvsc_switch_datapath(struct net_device *ndev, bool vf) |
84bf9cef | 44 | { |
3d541ac5 VK |
45 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
46 | struct hv_device *dev = net_device_ctx->device_ctx; | |
79e8cbe7 | 47 | struct netvsc_device *nv_dev = rtnl_dereference(net_device_ctx->nvdev); |
0a1275ca | 48 | struct nvsp_message *init_pkt = &nv_dev->channel_init_pkt; |
84bf9cef KS |
49 | |
50 | memset(init_pkt, 0, sizeof(struct nvsp_message)); | |
51 | init_pkt->hdr.msg_type = NVSP_MSG4_TYPE_SWITCH_DATA_PATH; | |
52 | if (vf) | |
53 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
54 | NVSP_DATAPATH_VF; | |
55 | else | |
56 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
57 | NVSP_DATAPATH_SYNTHETIC; | |
58 | ||
59 | vmbus_sendpacket(dev->channel, init_pkt, | |
60 | sizeof(struct nvsp_message), | |
61 | (unsigned long)init_pkt, | |
62 | VM_PKT_DATA_INBAND, 0); | |
53fa1a6f HZ |
63 | |
64 | net_device_ctx->datapath = vf; | |
84bf9cef KS |
65 | } |
66 | ||
88098834 | 67 | static struct netvsc_device *alloc_net_device(void) |
fceaf24a | 68 | { |
85799a37 | 69 | struct netvsc_device *net_device; |
fceaf24a | 70 | |
85799a37 HZ |
71 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
72 | if (!net_device) | |
fceaf24a HJ |
73 | return NULL; |
74 | ||
b8b835a8 | 75 | net_device->chan_table[0].mrc.buf |
76 | = vzalloc(NETVSC_RECVSLOT_MAX * sizeof(struct recv_comp_data)); | |
c0b558e5 | 77 | |
dc5cd894 | 78 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 79 | net_device->destroy = false; |
84bf9cef | 80 | atomic_set(&net_device->open_cnt, 0); |
7c3877f2 HZ |
81 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
82 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
fd612602 | 83 | init_completion(&net_device->channel_init_wait); |
7c3877f2 | 84 | |
85799a37 | 85 | return net_device; |
fceaf24a HJ |
86 | } |
87 | ||
545a8e79 | 88 | static void free_netvsc_device(struct rcu_head *head) |
f90251c8 | 89 | { |
545a8e79 | 90 | struct netvsc_device *nvdev |
91 | = container_of(head, struct netvsc_device, rcu); | |
c0b558e5 HZ |
92 | int i; |
93 | ||
94 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
b8b835a8 | 95 | vfree(nvdev->chan_table[i].mrc.buf); |
c0b558e5 | 96 | |
f90251c8 HZ |
97 | kfree(nvdev); |
98 | } | |
99 | ||
545a8e79 | 100 | static void free_netvsc_device_rcu(struct netvsc_device *nvdev) |
101 | { | |
102 | call_rcu(&nvdev->rcu, free_netvsc_device); | |
103 | } | |
fceaf24a | 104 | |
7a2a0a84 | 105 | static void netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
106 | { |
107 | struct nvsp_message *revoke_packet; | |
3d541ac5 | 108 | struct net_device *ndev = hv_get_drvdata(device); |
3962981f | 109 | struct net_device_context *ndc = netdev_priv(ndev); |
110 | struct netvsc_device *net_device = rtnl_dereference(ndc->nvdev); | |
7a2a0a84 | 111 | int ret; |
ec91cd09 HZ |
112 | |
113 | /* | |
114 | * If we got a section count, it means we received a | |
115 | * SendReceiveBufferComplete msg (ie sent | |
116 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
117 | * to send a revoke msg here | |
118 | */ | |
119 | if (net_device->recv_section_cnt) { | |
120 | /* Send the revoke receive buffer */ | |
121 | revoke_packet = &net_device->revoke_packet; | |
122 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
123 | ||
124 | revoke_packet->hdr.msg_type = | |
125 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
126 | revoke_packet->msg.v1_msg. | |
127 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
128 | ||
3d541ac5 | 129 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
130 | revoke_packet, |
131 | sizeof(struct nvsp_message), | |
132 | (unsigned long)revoke_packet, | |
133 | VM_PKT_DATA_INBAND, 0); | |
73e64fa4 S |
134 | /* If the failure is because the channel is rescinded; |
135 | * ignore the failure since we cannot send on a rescinded | |
136 | * channel. This would allow us to properly cleanup | |
137 | * even when the channel is rescinded. | |
138 | */ | |
139 | if (device->channel->rescind) | |
140 | ret = 0; | |
ec91cd09 HZ |
141 | /* |
142 | * If we failed here, we might as well return and | |
143 | * have a leak rather than continue and a bugchk | |
144 | */ | |
145 | if (ret != 0) { | |
d9871158 | 146 | netdev_err(ndev, "unable to send " |
c909ebbd | 147 | "revoke receive buffer to netvsp\n"); |
7a2a0a84 | 148 | return; |
ec91cd09 HZ |
149 | } |
150 | } | |
151 | ||
152 | /* Teardown the gpadl on the vsp end */ | |
153 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
154 | ret = vmbus_teardown_gpadl(device->channel, |
155 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
156 | |
157 | /* If we failed here, we might as well return and have a leak | |
158 | * rather than continue and a bugchk | |
159 | */ | |
160 | if (ret != 0) { | |
d9871158 | 161 | netdev_err(ndev, |
c909ebbd | 162 | "unable to teardown receive buffer's gpadl\n"); |
7a2a0a84 | 163 | return; |
ec91cd09 HZ |
164 | } |
165 | net_device->recv_buf_gpadl_handle = 0; | |
166 | } | |
167 | ||
168 | if (net_device->recv_buf) { | |
169 | /* Free up the receive buffer */ | |
b679ef73 | 170 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
171 | net_device->recv_buf = NULL; |
172 | } | |
173 | ||
174 | if (net_device->recv_section) { | |
175 | net_device->recv_section_cnt = 0; | |
176 | kfree(net_device->recv_section); | |
177 | net_device->recv_section = NULL; | |
178 | } | |
179 | ||
c25aaf81 KS |
180 | /* Deal with the send buffer we may have setup. |
181 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
182 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
183 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
184 | * to send a revoke msg here |
185 | */ | |
186 | if (net_device->send_section_size) { | |
187 | /* Send the revoke receive buffer */ | |
188 | revoke_packet = &net_device->revoke_packet; | |
189 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
190 | ||
191 | revoke_packet->hdr.msg_type = | |
192 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
193 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
194 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 195 | |
3d541ac5 | 196 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
197 | revoke_packet, |
198 | sizeof(struct nvsp_message), | |
199 | (unsigned long)revoke_packet, | |
200 | VM_PKT_DATA_INBAND, 0); | |
73e64fa4 S |
201 | |
202 | /* If the failure is because the channel is rescinded; | |
203 | * ignore the failure since we cannot send on a rescinded | |
204 | * channel. This would allow us to properly cleanup | |
205 | * even when the channel is rescinded. | |
206 | */ | |
207 | if (device->channel->rescind) | |
208 | ret = 0; | |
209 | ||
c25aaf81 KS |
210 | /* If we failed here, we might as well return and |
211 | * have a leak rather than continue and a bugchk | |
212 | */ | |
213 | if (ret != 0) { | |
214 | netdev_err(ndev, "unable to send " | |
215 | "revoke send buffer to netvsp\n"); | |
7a2a0a84 | 216 | return; |
c25aaf81 KS |
217 | } |
218 | } | |
219 | /* Teardown the gpadl on the vsp end */ | |
220 | if (net_device->send_buf_gpadl_handle) { | |
3d541ac5 | 221 | ret = vmbus_teardown_gpadl(device->channel, |
c25aaf81 KS |
222 | net_device->send_buf_gpadl_handle); |
223 | ||
224 | /* If we failed here, we might as well return and have a leak | |
225 | * rather than continue and a bugchk | |
226 | */ | |
227 | if (ret != 0) { | |
228 | netdev_err(ndev, | |
229 | "unable to teardown send buffer's gpadl\n"); | |
7a2a0a84 | 230 | return; |
c25aaf81 | 231 | } |
2f18423d | 232 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
233 | } |
234 | if (net_device->send_buf) { | |
c51ed182 | 235 | /* Free up the send buffer */ |
06b47aac | 236 | vfree(net_device->send_buf); |
c25aaf81 KS |
237 | net_device->send_buf = NULL; |
238 | } | |
239 | kfree(net_device->send_section_map); | |
ec91cd09 HZ |
240 | } |
241 | ||
95790837 | 242 | static int netvsc_init_buf(struct hv_device *device, |
243 | struct netvsc_device *net_device) | |
fceaf24a | 244 | { |
21a80820 | 245 | int ret = 0; |
85799a37 | 246 | struct nvsp_message *init_packet; |
2ddd5e5f | 247 | struct net_device *ndev; |
fdfb70d2 | 248 | size_t map_words; |
0a726c2b | 249 | int node; |
fceaf24a | 250 | |
0a1275ca | 251 | ndev = hv_get_drvdata(device); |
fceaf24a | 252 | |
0a726c2b S |
253 | node = cpu_to_node(device->channel->target_cpu); |
254 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
255 | if (!net_device->recv_buf) | |
256 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
257 | ||
53d21fdb | 258 | if (!net_device->recv_buf) { |
d9871158 | 259 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 260 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 261 | ret = -ENOMEM; |
0c3b7b2f | 262 | goto cleanup; |
fceaf24a | 263 | } |
fceaf24a | 264 | |
454f18a9 BP |
265 | /* |
266 | * Establish the gpadl handle for this buffer on this | |
267 | * channel. Note: This call uses the vmbus connection rather | |
268 | * than the channel to establish the gpadl handle. | |
269 | */ | |
53d21fdb HZ |
270 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
271 | net_device->recv_buf_size, | |
272 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 273 | if (ret != 0) { |
d9871158 | 274 | netdev_err(ndev, |
c909ebbd | 275 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 276 | goto cleanup; |
fceaf24a HJ |
277 | } |
278 | ||
454f18a9 | 279 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 280 | init_packet = &net_device->channel_init_pkt; |
85799a37 | 281 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
282 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
283 | init_packet->msg.v1_msg.send_recv_buf. | |
284 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
285 | init_packet->msg.v1_msg. | |
286 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 287 | |
454f18a9 | 288 | /* Send the gpadl notification request */ |
85799a37 | 289 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 290 | sizeof(struct nvsp_message), |
85799a37 | 291 | (unsigned long)init_packet, |
415f2287 | 292 | VM_PKT_DATA_INBAND, |
5a4df290 | 293 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 294 | if (ret != 0) { |
d9871158 | 295 | netdev_err(ndev, |
c909ebbd | 296 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 297 | goto cleanup; |
fceaf24a HJ |
298 | } |
299 | ||
5362855a | 300 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 301 | |
454f18a9 | 302 | /* Check the response */ |
53d21fdb HZ |
303 | if (init_packet->msg.v1_msg. |
304 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 305 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 306 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
307 | init_packet->msg.v1_msg. |
308 | send_recv_buf_complete.status); | |
927bc33c | 309 | ret = -EINVAL; |
0c3b7b2f | 310 | goto cleanup; |
fceaf24a HJ |
311 | } |
312 | ||
454f18a9 | 313 | /* Parse the response */ |
fceaf24a | 314 | |
53d21fdb HZ |
315 | net_device->recv_section_cnt = init_packet->msg. |
316 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 317 | |
c1813200 HZ |
318 | net_device->recv_section = kmemdup( |
319 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
320 | net_device->recv_section_cnt * | |
321 | sizeof(struct nvsp_1_receive_buffer_section), | |
322 | GFP_KERNEL); | |
53d21fdb | 323 | if (net_device->recv_section == NULL) { |
927bc33c | 324 | ret = -EINVAL; |
0c3b7b2f | 325 | goto cleanup; |
fceaf24a HJ |
326 | } |
327 | ||
21a80820 GKH |
328 | /* |
329 | * For 1st release, there should only be 1 section that represents the | |
330 | * entire receive buffer | |
331 | */ | |
53d21fdb HZ |
332 | if (net_device->recv_section_cnt != 1 || |
333 | net_device->recv_section->offset != 0) { | |
927bc33c | 334 | ret = -EINVAL; |
0c3b7b2f | 335 | goto cleanup; |
fceaf24a HJ |
336 | } |
337 | ||
c25aaf81 KS |
338 | /* Now setup the send buffer. |
339 | */ | |
5defde59 S |
340 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
341 | if (!net_device->send_buf) | |
342 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
343 | if (!net_device->send_buf) { |
344 | netdev_err(ndev, "unable to allocate send " | |
345 | "buffer of size %d\n", net_device->send_buf_size); | |
346 | ret = -ENOMEM; | |
347 | goto cleanup; | |
348 | } | |
349 | ||
350 | /* Establish the gpadl handle for this buffer on this | |
351 | * channel. Note: This call uses the vmbus connection rather | |
352 | * than the channel to establish the gpadl handle. | |
353 | */ | |
354 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
355 | net_device->send_buf_size, | |
356 | &net_device->send_buf_gpadl_handle); | |
357 | if (ret != 0) { | |
358 | netdev_err(ndev, | |
359 | "unable to establish send buffer's gpadl\n"); | |
360 | goto cleanup; | |
361 | } | |
362 | ||
363 | /* Notify the NetVsp of the gpadl handle */ | |
364 | init_packet = &net_device->channel_init_pkt; | |
365 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
366 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 367 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 368 | net_device->send_buf_gpadl_handle; |
c51ed182 | 369 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
370 | |
371 | /* Send the gpadl notification request */ | |
372 | ret = vmbus_sendpacket(device->channel, init_packet, | |
373 | sizeof(struct nvsp_message), | |
374 | (unsigned long)init_packet, | |
375 | VM_PKT_DATA_INBAND, | |
376 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
377 | if (ret != 0) { | |
378 | netdev_err(ndev, | |
379 | "unable to send send buffer's gpadl to netvsp\n"); | |
380 | goto cleanup; | |
381 | } | |
382 | ||
5362855a | 383 | wait_for_completion(&net_device->channel_init_wait); |
c25aaf81 KS |
384 | |
385 | /* Check the response */ | |
386 | if (init_packet->msg.v1_msg. | |
387 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
388 | netdev_err(ndev, "Unable to complete send buffer " | |
389 | "initialization with NetVsp - status %d\n", | |
390 | init_packet->msg.v1_msg. | |
c51ed182 | 391 | send_send_buf_complete.status); |
c25aaf81 KS |
392 | ret = -EINVAL; |
393 | goto cleanup; | |
394 | } | |
395 | ||
396 | /* Parse the response */ | |
397 | net_device->send_section_size = init_packet->msg. | |
398 | v1_msg.send_send_buf_complete.section_size; | |
399 | ||
400 | /* Section count is simply the size divided by the section size. | |
401 | */ | |
402 | net_device->send_section_cnt = | |
796cc88c | 403 | net_device->send_buf_size / net_device->send_section_size; |
c25aaf81 | 404 | |
93ba2222 VK |
405 | netdev_dbg(ndev, "Send section size: %d, Section count:%d\n", |
406 | net_device->send_section_size, net_device->send_section_cnt); | |
c25aaf81 KS |
407 | |
408 | /* Setup state for managing the send buffer. */ | |
fdfb70d2 | 409 | map_words = DIV_ROUND_UP(net_device->send_section_cnt, BITS_PER_LONG); |
c25aaf81 | 410 | |
fdfb70d2 | 411 | net_device->send_section_map = kcalloc(map_words, sizeof(ulong), GFP_KERNEL); |
dd1d3f8f WY |
412 | if (net_device->send_section_map == NULL) { |
413 | ret = -ENOMEM; | |
c25aaf81 | 414 | goto cleanup; |
dd1d3f8f | 415 | } |
c25aaf81 | 416 | |
0c3b7b2f | 417 | goto exit; |
fceaf24a | 418 | |
0c3b7b2f | 419 | cleanup: |
3d541ac5 | 420 | netvsc_destroy_buf(device); |
fceaf24a | 421 | |
0c3b7b2f | 422 | exit: |
fceaf24a HJ |
423 | return ret; |
424 | } | |
425 | ||
f157e78d HZ |
426 | /* Negotiate NVSP protocol version */ |
427 | static int negotiate_nvsp_ver(struct hv_device *device, | |
428 | struct netvsc_device *net_device, | |
429 | struct nvsp_message *init_packet, | |
430 | u32 nvsp_ver) | |
fceaf24a | 431 | { |
0a1275ca | 432 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c | 433 | int ret; |
fceaf24a | 434 | |
85799a37 | 435 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 436 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
437 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
438 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 439 | |
454f18a9 | 440 | /* Send the init request */ |
85799a37 | 441 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 442 | sizeof(struct nvsp_message), |
85799a37 | 443 | (unsigned long)init_packet, |
415f2287 | 444 | VM_PKT_DATA_INBAND, |
5a4df290 | 445 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 446 | |
b8a3d52b | 447 | if (ret != 0) |
f157e78d | 448 | return ret; |
fceaf24a | 449 | |
5362855a | 450 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 451 | |
53d21fdb | 452 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
453 | NVSP_STAT_SUCCESS) |
454 | return -EINVAL; | |
fceaf24a | 455 | |
a1eabb01 | 456 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
457 | return 0; |
458 | ||
71790a27 | 459 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
460 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
461 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 462 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 463 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 464 | |
7f5d5af0 | 465 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) { |
71790a27 HZ |
466 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
467 | ||
7f5d5af0 HZ |
468 | /* Teaming bit is needed to receive link speed updates */ |
469 | init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1; | |
470 | } | |
471 | ||
f157e78d HZ |
472 | ret = vmbus_sendpacket(device->channel, init_packet, |
473 | sizeof(struct nvsp_message), | |
474 | (unsigned long)init_packet, | |
475 | VM_PKT_DATA_INBAND, 0); | |
476 | ||
477 | return ret; | |
478 | } | |
479 | ||
95790837 | 480 | static int netvsc_connect_vsp(struct hv_device *device, |
481 | struct netvsc_device *net_device) | |
f157e78d | 482 | { |
e5a78fad SH |
483 | const u32 ver_list[] = { |
484 | NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, | |
95790837 | 485 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 |
486 | }; | |
487 | struct nvsp_message *init_packet; | |
488 | int ndis_version, i, ret; | |
f157e78d HZ |
489 | |
490 | init_packet = &net_device->channel_init_pkt; | |
491 | ||
492 | /* Negotiate the latest NVSP protocol supported */ | |
e5a78fad | 493 | for (i = ARRAY_SIZE(ver_list) - 1; i >= 0; i--) |
a1eabb01 HZ |
494 | if (negotiate_nvsp_ver(device, net_device, init_packet, |
495 | ver_list[i]) == 0) { | |
496 | net_device->nvsp_version = ver_list[i]; | |
497 | break; | |
498 | } | |
499 | ||
500 | if (i < 0) { | |
0f48c72c | 501 | ret = -EPROTO; |
0c3b7b2f | 502 | goto cleanup; |
fceaf24a | 503 | } |
f157e78d HZ |
504 | |
505 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
506 | ||
454f18a9 | 507 | /* Send the ndis version */ |
85799a37 | 508 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 509 | |
a1eabb01 | 510 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 511 | ndis_version = 0x00060001; |
a1eabb01 HZ |
512 | else |
513 | ndis_version = 0x0006001e; | |
fceaf24a | 514 | |
53d21fdb HZ |
515 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
516 | init_packet->msg.v1_msg. | |
517 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 518 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
519 | init_packet->msg.v1_msg. |
520 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 521 | ndis_version & 0xFFFF; |
fceaf24a | 522 | |
454f18a9 | 523 | /* Send the init request */ |
85799a37 | 524 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
525 | sizeof(struct nvsp_message), |
526 | (unsigned long)init_packet, | |
527 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 528 | if (ret != 0) |
0c3b7b2f | 529 | goto cleanup; |
454f18a9 BP |
530 | |
531 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
532 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
533 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
534 | else | |
535 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 536 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 537 | |
95790837 | 538 | ret = netvsc_init_buf(device, net_device); |
fceaf24a | 539 | |
0c3b7b2f | 540 | cleanup: |
fceaf24a HJ |
541 | return ret; |
542 | } | |
543 | ||
3d541ac5 | 544 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 545 | { |
3d541ac5 | 546 | netvsc_destroy_buf(device); |
fceaf24a HJ |
547 | } |
548 | ||
3e189519 | 549 | /* |
5a71ae30 | 550 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 551 | */ |
e08f3ea5 | 552 | void netvsc_device_remove(struct hv_device *device) |
fceaf24a | 553 | { |
3d541ac5 VK |
554 | struct net_device *ndev = hv_get_drvdata(device); |
555 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
79e8cbe7 | 556 | struct netvsc_device *net_device |
557 | = rtnl_dereference(net_device_ctx->nvdev); | |
15a863bf | 558 | int i; |
fceaf24a | 559 | |
3d541ac5 | 560 | netvsc_disconnect_vsp(device); |
9d88f33a | 561 | |
545a8e79 | 562 | RCU_INIT_POINTER(net_device_ctx->nvdev, NULL); |
3852409b | 563 | |
86c921af S |
564 | /* |
565 | * At this point, no one should be accessing net_device | |
566 | * except in here | |
567 | */ | |
93ba2222 | 568 | netdev_dbg(ndev, "net device safe to remove\n"); |
fceaf24a | 569 | |
454f18a9 | 570 | /* Now, we can close the channel safely */ |
85799a37 | 571 | vmbus_close(device->channel); |
fceaf24a | 572 | |
76bb5db5 | 573 | /* And dissassociate NAPI context from device */ |
79cd874c | 574 | for (i = 0; i < net_device->num_chn; i++) |
76bb5db5 | 575 | netif_napi_del(&net_device->chan_table[i].napi); |
15a863bf | 576 | |
454f18a9 | 577 | /* Release all resources */ |
545a8e79 | 578 | free_netvsc_device_rcu(net_device); |
fceaf24a HJ |
579 | } |
580 | ||
33be96e4 HZ |
581 | #define RING_AVAIL_PERCENT_HIWATER 20 |
582 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
583 | ||
584 | /* | |
585 | * Get the percentage of available bytes to write in the ring. | |
586 | * The return value is in range from 0 to 100. | |
587 | */ | |
588 | static inline u32 hv_ringbuf_avail_percent( | |
589 | struct hv_ring_buffer_info *ring_info) | |
590 | { | |
591 | u32 avail_read, avail_write; | |
592 | ||
593 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
594 | ||
595 | return avail_write * 100 / ring_info->ring_datasize; | |
596 | } | |
597 | ||
c25aaf81 KS |
598 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
599 | u32 index) | |
600 | { | |
601 | sync_change_bit(index, net_device->send_section_map); | |
602 | } | |
603 | ||
bc304dd3 SH |
604 | static void netvsc_send_tx_complete(struct netvsc_device *net_device, |
605 | struct vmbus_channel *incoming_channel, | |
606 | struct hv_device *device, | |
f9645430 | 607 | const struct vmpacket_descriptor *desc, |
608 | int budget) | |
bc304dd3 | 609 | { |
50698d80 | 610 | struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id; |
bc304dd3 | 611 | struct net_device *ndev = hv_get_drvdata(device); |
bc304dd3 | 612 | struct vmbus_channel *channel = device->channel; |
bc304dd3 SH |
613 | u16 q_idx = 0; |
614 | int queue_sends; | |
615 | ||
616 | /* Notify the layer above us */ | |
617 | if (likely(skb)) { | |
793e3955 | 618 | const struct hv_netvsc_packet *packet |
bc304dd3 | 619 | = (struct hv_netvsc_packet *)skb->cb; |
793e3955 | 620 | u32 send_index = packet->send_buf_index; |
621 | struct netvsc_stats *tx_stats; | |
bc304dd3 SH |
622 | |
623 | if (send_index != NETVSC_INVALID_INDEX) | |
624 | netvsc_free_send_slot(net_device, send_index); | |
793e3955 | 625 | q_idx = packet->q_idx; |
bc304dd3 SH |
626 | channel = incoming_channel; |
627 | ||
6c80f3fc | 628 | tx_stats = &net_device->chan_table[q_idx].tx_stats; |
793e3955 | 629 | |
630 | u64_stats_update_begin(&tx_stats->syncp); | |
631 | tx_stats->packets += packet->total_packets; | |
632 | tx_stats->bytes += packet->total_bytes; | |
633 | u64_stats_update_end(&tx_stats->syncp); | |
634 | ||
f9645430 | 635 | napi_consume_skb(skb, budget); |
bc304dd3 SH |
636 | } |
637 | ||
b8b835a8 | 638 | queue_sends = |
639 | atomic_dec_return(&net_device->chan_table[q_idx].queue_sends); | |
bc304dd3 | 640 | |
46b4f7f5 | 641 | if (net_device->destroy && queue_sends == 0) |
bc304dd3 SH |
642 | wake_up(&net_device->wait_drain); |
643 | ||
644 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && | |
bc304dd3 SH |
645 | (hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER || |
646 | queue_sends < 1)) | |
647 | netif_tx_wake_queue(netdev_get_tx_queue(ndev, q_idx)); | |
648 | } | |
649 | ||
97c1723a | 650 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 651 | struct vmbus_channel *incoming_channel, |
97c1723a | 652 | struct hv_device *device, |
f9645430 | 653 | const struct vmpacket_descriptor *desc, |
654 | int budget) | |
fceaf24a | 655 | { |
f3dd3f47 | 656 | struct nvsp_message *nvsp_packet = hv_pkt_data(desc); |
3d541ac5 | 657 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 658 | |
bc304dd3 SH |
659 | switch (nvsp_packet->hdr.msg_type) { |
660 | case NVSP_MSG_TYPE_INIT_COMPLETE: | |
661 | case NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE: | |
662 | case NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE: | |
663 | case NVSP_MSG5_TYPE_SUBCHANNEL: | |
454f18a9 | 664 | /* Copy the response back */ |
53d21fdb | 665 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 666 | sizeof(struct nvsp_message)); |
35abb21a | 667 | complete(&net_device->channel_init_wait); |
bc304dd3 SH |
668 | break; |
669 | ||
670 | case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: | |
671 | netvsc_send_tx_complete(net_device, incoming_channel, | |
f9645430 | 672 | device, desc, budget); |
bc304dd3 | 673 | break; |
fceaf24a | 674 | |
bc304dd3 SH |
675 | default: |
676 | netdev_err(ndev, | |
677 | "Unknown send completion type %d received!!\n", | |
678 | nvsp_packet->hdr.msg_type); | |
fceaf24a | 679 | } |
fceaf24a HJ |
680 | } |
681 | ||
c25aaf81 KS |
682 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
683 | { | |
b58a1858 | 684 | unsigned long *map_addr = net_device->send_section_map; |
685 | unsigned int i; | |
686 | ||
fdfb70d2 | 687 | for_each_clear_bit(i, map_addr, net_device->send_section_cnt) { |
b58a1858 | 688 | if (sync_test_and_set_bit(i, map_addr) == 0) |
689 | return i; | |
c25aaf81 | 690 | } |
b58a1858 | 691 | |
692 | return NETVSC_INVALID_INDEX; | |
c25aaf81 KS |
693 | } |
694 | ||
da19fcd0 LP |
695 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
696 | unsigned int section_index, | |
7c3877f2 | 697 | u32 pend_size, |
24476760 | 698 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 699 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
700 | struct hv_page_buffer **pb, |
701 | struct sk_buff *skb) | |
c25aaf81 KS |
702 | { |
703 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
704 | char *dest = start + (section_index * net_device->send_section_size) |
705 | + pend_size; | |
c25aaf81 KS |
706 | int i; |
707 | u32 msg_size = 0; | |
7c3877f2 HZ |
708 | u32 padding = 0; |
709 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
710 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
711 | packet->page_buf_cnt; | |
7c3877f2 HZ |
712 | |
713 | /* Add padding */ | |
ebc1dcf6 | 714 | if (skb->xmit_more && remain && !packet->cp_partial) { |
7c3877f2 | 715 | padding = net_device->pkt_align - remain; |
24476760 | 716 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
717 | packet->total_data_buflen += padding; |
718 | } | |
c25aaf81 | 719 | |
aa0a34be | 720 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
721 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
722 | u32 offset = (*pb)[i].offset; | |
723 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
724 | |
725 | memcpy(dest, (src + offset), len); | |
726 | msg_size += len; | |
727 | dest += len; | |
728 | } | |
7c3877f2 HZ |
729 | |
730 | if (padding) { | |
731 | memset(dest, 0, padding); | |
732 | msg_size += padding; | |
733 | } | |
734 | ||
c25aaf81 KS |
735 | return msg_size; |
736 | } | |
737 | ||
3a8963ac | 738 | static inline int netvsc_send_pkt( |
0a1275ca | 739 | struct hv_device *device, |
7c3877f2 | 740 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 741 | struct netvsc_device *net_device, |
3a3d9a0a KS |
742 | struct hv_page_buffer **pb, |
743 | struct sk_buff *skb) | |
fceaf24a | 744 | { |
7c3877f2 | 745 | struct nvsp_message nvmsg; |
b8b835a8 | 746 | struct netvsc_channel *nvchan |
747 | = &net_device->chan_table[packet->q_idx]; | |
748 | struct vmbus_channel *out_channel = nvchan->channel; | |
0a1275ca | 749 | struct net_device *ndev = hv_get_drvdata(device); |
b8b835a8 | 750 | struct netdev_queue *txq = netdev_get_tx_queue(ndev, packet->q_idx); |
7c3877f2 HZ |
751 | u64 req_id; |
752 | int ret; | |
aa0a34be | 753 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 754 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
c25aaf81 | 755 | |
7c3877f2 | 756 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 757 | if (skb != NULL) { |
21a80820 | 758 | /* 0 is RMC_DATA; */ |
7c3877f2 | 759 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
760 | } else { |
761 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 762 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 763 | } |
fceaf24a | 764 | |
7c3877f2 HZ |
765 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
766 | packet->send_buf_index; | |
767 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
768 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
769 | else | |
770 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
771 | packet->total_data_buflen; | |
21a80820 | 772 | |
3a3d9a0a | 773 | req_id = (ulong)skb; |
f1ea3cd7 | 774 | |
c3582a2c HZ |
775 | if (out_channel->rescind) |
776 | return -ENODEV; | |
777 | ||
72a2f5bd | 778 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
779 | pgbuf = packet->cp_partial ? (*pb) + |
780 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
781 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
782 | pgbuf, | |
783 | packet->page_buf_cnt, | |
784 | &nvmsg, | |
785 | sizeof(struct nvsp_message), | |
786 | req_id, | |
3454323c | 787 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 788 | } else { |
82fa3c77 KS |
789 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
790 | sizeof(struct nvsp_message), | |
791 | req_id, | |
792 | VM_PKT_DATA_INBAND, | |
3454323c | 793 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
fceaf24a HJ |
794 | } |
795 | ||
1d06825b | 796 | if (ret == 0) { |
b8b835a8 | 797 | atomic_inc_return(&nvchan->queue_sends); |
5b54dac8 | 798 | |
46b4f7f5 | 799 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) |
b8b835a8 | 800 | netif_tx_stop_queue(txq); |
1d06825b | 801 | } else if (ret == -EAGAIN) { |
b8b835a8 | 802 | netif_tx_stop_queue(txq); |
803 | if (atomic_read(&nvchan->queue_sends) < 1) { | |
804 | netif_tx_wake_queue(txq); | |
33be96e4 HZ |
805 | ret = -ENOSPC; |
806 | } | |
1d06825b | 807 | } else { |
4a2176c6 | 808 | netdev_err(ndev, |
809 | "Unable to send packet pages %u len %u, ret %d\n", | |
810 | packet->page_buf_cnt, packet->total_data_buflen, | |
811 | ret); | |
1d06825b | 812 | } |
fceaf24a | 813 | |
7c3877f2 HZ |
814 | return ret; |
815 | } | |
816 | ||
c85e4924 HZ |
817 | /* Move packet out of multi send data (msd), and clear msd */ |
818 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
819 | struct sk_buff **msd_skb, | |
820 | struct multi_send_data *msdp) | |
821 | { | |
822 | *msd_skb = msdp->skb; | |
823 | *msd_send = msdp->pkt; | |
824 | msdp->skb = NULL; | |
825 | msdp->pkt = NULL; | |
826 | msdp->count = 0; | |
827 | } | |
828 | ||
2a926f79 | 829 | /* RCU already held by caller */ |
830 | int netvsc_send(struct net_device_context *ndev_ctx, | |
24476760 | 831 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 832 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
833 | struct hv_page_buffer **pb, |
834 | struct sk_buff *skb) | |
7c3877f2 | 835 | { |
3962981f | 836 | struct netvsc_device *net_device |
867047c4 | 837 | = rcu_dereference_bh(ndev_ctx->nvdev); |
2a926f79 | 838 | struct hv_device *device = ndev_ctx->device_ctx; |
6c4c137e | 839 | int ret = 0; |
b8b835a8 | 840 | struct netvsc_channel *nvchan; |
7c3877f2 HZ |
841 | u32 pktlen = packet->total_data_buflen, msd_len = 0; |
842 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
843 | struct multi_send_data *msdp; |
844 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 845 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 846 | bool try_batch; |
bde79be5 | 847 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 | 848 | |
592b4fe8 | 849 | /* If device is rescinded, return error and packet will get dropped. */ |
2a926f79 | 850 | if (unlikely(!net_device || net_device->destroy)) |
7c3877f2 HZ |
851 | return -ENODEV; |
852 | ||
e8f0a89c VK |
853 | /* We may race with netvsc_connect_vsp()/netvsc_init_buf() and get |
854 | * here before the negotiation with the host is finished and | |
855 | * send_section_map may not be allocated yet. | |
856 | */ | |
2d694d2a | 857 | if (unlikely(!net_device->send_section_map)) |
e8f0a89c VK |
858 | return -EAGAIN; |
859 | ||
b8b835a8 | 860 | nvchan = &net_device->chan_table[packet->q_idx]; |
7c3877f2 | 861 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 862 | packet->cp_partial = false; |
7c3877f2 | 863 | |
cf8190e4 HZ |
864 | /* Send control message directly without accessing msd (Multi-Send |
865 | * Data) field which may be changed during data packet processing. | |
866 | */ | |
867 | if (!skb) { | |
868 | cur_send = packet; | |
869 | goto send_now; | |
870 | } | |
871 | ||
7c3877f2 | 872 | /* batch packets in send buffer if possible */ |
b8b835a8 | 873 | msdp = &nvchan->msd; |
7c3877f2 HZ |
874 | if (msdp->pkt) |
875 | msd_len = msdp->pkt->total_data_buflen; | |
876 | ||
ebc1dcf6 | 877 | try_batch = msd_len > 0 && msdp->count < net_device->max_pkt; |
aa0a34be | 878 | if (try_batch && msd_len + pktlen + net_device->pkt_align < |
7c3877f2 HZ |
879 | net_device->send_section_size) { |
880 | section_index = msdp->pkt->send_buf_index; | |
881 | ||
aa0a34be HZ |
882 | } else if (try_batch && msd_len + packet->rmsg_size < |
883 | net_device->send_section_size) { | |
884 | section_index = msdp->pkt->send_buf_index; | |
885 | packet->cp_partial = true; | |
886 | ||
ebc1dcf6 | 887 | } else if (pktlen + net_device->pkt_align < |
7c3877f2 HZ |
888 | net_device->send_section_size) { |
889 | section_index = netvsc_get_next_send_section(net_device); | |
890 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
891 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
892 | msd_len = 0; | |
7c3877f2 HZ |
893 | } |
894 | } | |
895 | ||
896 | if (section_index != NETVSC_INVALID_INDEX) { | |
897 | netvsc_copy_to_send_buf(net_device, | |
898 | section_index, msd_len, | |
694a9fb0 | 899 | packet, rndis_msg, pb, skb); |
b08cc791 | 900 | |
7c3877f2 | 901 | packet->send_buf_index = section_index; |
aa0a34be HZ |
902 | |
903 | if (packet->cp_partial) { | |
904 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
905 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
906 | } else { | |
907 | packet->page_buf_cnt = 0; | |
908 | packet->total_data_buflen += msd_len; | |
aa0a34be | 909 | } |
7c3877f2 | 910 | |
793e3955 | 911 | if (msdp->pkt) { |
912 | packet->total_packets += msdp->pkt->total_packets; | |
913 | packet->total_bytes += msdp->pkt->total_bytes; | |
914 | } | |
915 | ||
c85e4924 | 916 | if (msdp->skb) |
17db4bce | 917 | dev_consume_skb_any(msdp->skb); |
ee90b812 | 918 | |
bde79be5 | 919 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 920 | msdp->skb = skb; |
7c3877f2 HZ |
921 | msdp->pkt = packet; |
922 | msdp->count++; | |
923 | } else { | |
924 | cur_send = packet; | |
c85e4924 | 925 | msdp->skb = NULL; |
7c3877f2 HZ |
926 | msdp->pkt = NULL; |
927 | msdp->count = 0; | |
928 | } | |
929 | } else { | |
c85e4924 | 930 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
931 | cur_send = packet; |
932 | } | |
933 | ||
7c3877f2 | 934 | if (msd_send) { |
6c4c137e SH |
935 | int m_ret = netvsc_send_pkt(device, msd_send, net_device, |
936 | NULL, msd_skb); | |
7c3877f2 HZ |
937 | |
938 | if (m_ret != 0) { | |
939 | netvsc_free_send_slot(net_device, | |
940 | msd_send->send_buf_index); | |
c85e4924 | 941 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
942 | } |
943 | } | |
944 | ||
cf8190e4 | 945 | send_now: |
7c3877f2 | 946 | if (cur_send) |
0a1275ca | 947 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 948 | |
7aab5159 JS |
949 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
950 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 951 | |
fceaf24a HJ |
952 | return ret; |
953 | } | |
954 | ||
c0b558e5 HZ |
955 | static int netvsc_send_recv_completion(struct vmbus_channel *channel, |
956 | u64 transaction_id, u32 status) | |
5fa9d3c5 HZ |
957 | { |
958 | struct nvsp_message recvcompMessage; | |
5fa9d3c5 HZ |
959 | int ret; |
960 | ||
961 | recvcompMessage.hdr.msg_type = | |
962 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
963 | ||
63f6921d | 964 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 | 965 | |
5fa9d3c5 | 966 | /* Send the completion */ |
5b54dac8 | 967 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
c0b558e5 HZ |
968 | sizeof(struct nvsp_message_header) + sizeof(u32), |
969 | transaction_id, VM_PKT_COMP, 0); | |
970 | ||
971 | return ret; | |
972 | } | |
973 | ||
974 | static inline void count_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx, | |
975 | u32 *filled, u32 *avail) | |
976 | { | |
b8b835a8 | 977 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
978 | u32 first = mrc->first; | |
979 | u32 next = mrc->next; | |
c0b558e5 HZ |
980 | |
981 | *filled = (first > next) ? NETVSC_RECVSLOT_MAX - first + next : | |
982 | next - first; | |
983 | ||
984 | *avail = NETVSC_RECVSLOT_MAX - *filled - 1; | |
985 | } | |
986 | ||
987 | /* Read the first filled slot, no change to index */ | |
988 | static inline struct recv_comp_data *read_recv_comp_slot(struct netvsc_device | |
989 | *nvdev, u16 q_idx) | |
990 | { | |
b8b835a8 | 991 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
992 | u32 filled, avail; |
993 | ||
b8b835a8 | 994 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
995 | return NULL; |
996 | ||
997 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
998 | if (!filled) | |
999 | return NULL; | |
1000 | ||
b8b835a8 | 1001 | return mrc->buf + mrc->first * sizeof(struct recv_comp_data); |
c0b558e5 HZ |
1002 | } |
1003 | ||
1004 | /* Put the first filled slot back to available pool */ | |
1005 | static inline void put_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx) | |
1006 | { | |
b8b835a8 | 1007 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1008 | int num_recv; |
1009 | ||
b8b835a8 | 1010 | mrc->first = (mrc->first + 1) % NETVSC_RECVSLOT_MAX; |
c0b558e5 HZ |
1011 | |
1012 | num_recv = atomic_dec_return(&nvdev->num_outstanding_recvs); | |
1013 | ||
1014 | if (nvdev->destroy && num_recv == 0) | |
1015 | wake_up(&nvdev->wait_drain); | |
1016 | } | |
1017 | ||
1018 | /* Check and send pending recv completions */ | |
1019 | static void netvsc_chk_recv_comp(struct netvsc_device *nvdev, | |
1020 | struct vmbus_channel *channel, u16 q_idx) | |
1021 | { | |
1022 | struct recv_comp_data *rcd; | |
1023 | int ret; | |
1024 | ||
1025 | while (true) { | |
1026 | rcd = read_recv_comp_slot(nvdev, q_idx); | |
1027 | if (!rcd) | |
1028 | break; | |
1029 | ||
1030 | ret = netvsc_send_recv_completion(channel, rcd->tid, | |
1031 | rcd->status); | |
1032 | if (ret) | |
1033 | break; | |
1034 | ||
1035 | put_recv_comp_slot(nvdev, q_idx); | |
5fa9d3c5 HZ |
1036 | } |
1037 | } | |
1038 | ||
c0b558e5 HZ |
1039 | #define NETVSC_RCD_WATERMARK 80 |
1040 | ||
1041 | /* Get next available slot */ | |
1042 | static inline struct recv_comp_data *get_recv_comp_slot( | |
1043 | struct netvsc_device *nvdev, struct vmbus_channel *channel, u16 q_idx) | |
1044 | { | |
b8b835a8 | 1045 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1046 | u32 filled, avail, next; |
1047 | struct recv_comp_data *rcd; | |
1048 | ||
b8b835a8 | 1049 | if (unlikely(!nvdev->recv_section)) |
c0b558e5 HZ |
1050 | return NULL; |
1051 | ||
b8b835a8 | 1052 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
1053 | return NULL; |
1054 | ||
1055 | if (atomic_read(&nvdev->num_outstanding_recvs) > | |
1056 | nvdev->recv_section->num_sub_allocs * NETVSC_RCD_WATERMARK / 100) | |
1057 | netvsc_chk_recv_comp(nvdev, channel, q_idx); | |
1058 | ||
1059 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1060 | if (!avail) | |
1061 | return NULL; | |
1062 | ||
b8b835a8 | 1063 | next = mrc->next; |
1064 | rcd = mrc->buf + next * sizeof(struct recv_comp_data); | |
1065 | mrc->next = (next + 1) % NETVSC_RECVSLOT_MAX; | |
c0b558e5 HZ |
1066 | |
1067 | atomic_inc(&nvdev->num_outstanding_recvs); | |
1068 | ||
1069 | return rcd; | |
1070 | } | |
1071 | ||
15a863bf | 1072 | static int netvsc_receive(struct net_device *ndev, |
dc54a08c | 1073 | struct netvsc_device *net_device, |
1074 | struct net_device_context *net_device_ctx, | |
1075 | struct hv_device *device, | |
1076 | struct vmbus_channel *channel, | |
f3dd3f47 | 1077 | const struct vmpacket_descriptor *desc, |
dc54a08c | 1078 | struct nvsp_message *nvsp) |
fceaf24a | 1079 | { |
f3dd3f47 | 1080 | const struct vmtransfer_page_packet_header *vmxferpage_packet |
1081 | = container_of(desc, const struct vmtransfer_page_packet_header, d); | |
15a863bf | 1082 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
dc54a08c | 1083 | char *recv_buf = net_device->recv_buf; |
4baab261 | 1084 | u32 status = NVSP_STAT_SUCCESS; |
45326342 HZ |
1085 | int i; |
1086 | int count = 0; | |
c0b558e5 | 1087 | int ret; |
779b4d17 | 1088 | |
454f18a9 | 1089 | /* Make sure this is a valid nvsp packet */ |
dc54a08c | 1090 | if (unlikely(nvsp->hdr.msg_type != NVSP_MSG1_TYPE_SEND_RNDIS_PKT)) { |
1091 | netif_err(net_device_ctx, rx_err, ndev, | |
1092 | "Unknown nvsp packet type received %u\n", | |
1093 | nvsp->hdr.msg_type); | |
15a863bf | 1094 | return 0; |
fceaf24a HJ |
1095 | } |
1096 | ||
dc54a08c | 1097 | if (unlikely(vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID)) { |
1098 | netif_err(net_device_ctx, rx_err, ndev, | |
1099 | "Invalid xfer page set id - expecting %x got %x\n", | |
1100 | NETVSC_RECEIVE_BUFFER_ID, | |
1101 | vmxferpage_packet->xfer_pageset_id); | |
15a863bf | 1102 | return 0; |
fceaf24a HJ |
1103 | } |
1104 | ||
4baab261 | 1105 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1106 | |
454f18a9 | 1107 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1108 | for (i = 0; i < count; i++) { |
dc54a08c | 1109 | void *data = recv_buf |
1110 | + vmxferpage_packet->ranges[i].byte_offset; | |
1111 | u32 buflen = vmxferpage_packet->ranges[i].byte_count; | |
fceaf24a | 1112 | |
454f18a9 | 1113 | /* Pass it to the upper layer */ |
dc54a08c | 1114 | status = rndis_filter_receive(ndev, net_device, device, |
1115 | channel, data, buflen); | |
fceaf24a HJ |
1116 | } |
1117 | ||
15a863bf | 1118 | if (net_device->chan_table[q_idx].mrc.buf) { |
1119 | struct recv_comp_data *rcd; | |
1120 | ||
1121 | rcd = get_recv_comp_slot(net_device, channel, q_idx); | |
1122 | if (rcd) { | |
1123 | rcd->tid = vmxferpage_packet->d.trans_id; | |
1124 | rcd->status = status; | |
1125 | } else { | |
1126 | netdev_err(ndev, "Recv_comp full buf q:%hd, tid:%llx\n", | |
1127 | q_idx, vmxferpage_packet->d.trans_id); | |
1128 | } | |
1129 | } else { | |
c0b558e5 HZ |
1130 | ret = netvsc_send_recv_completion(channel, |
1131 | vmxferpage_packet->d.trans_id, | |
1132 | status); | |
1133 | if (ret) | |
1134 | netdev_err(ndev, "Recv_comp q:%hd, tid:%llx, err:%d\n", | |
1135 | q_idx, vmxferpage_packet->d.trans_id, ret); | |
c0b558e5 | 1136 | } |
15a863bf | 1137 | return count; |
fceaf24a HJ |
1138 | } |
1139 | ||
5b54dac8 | 1140 | static void netvsc_send_table(struct hv_device *hdev, |
71790a27 | 1141 | struct nvsp_message *nvmsg) |
5b54dac8 | 1142 | { |
0a1275ca | 1143 | struct net_device *ndev = hv_get_drvdata(hdev); |
7ce10124 | 1144 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
5b54dac8 HZ |
1145 | int i; |
1146 | u32 count, *tab; | |
1147 | ||
5b54dac8 HZ |
1148 | count = nvmsg->msg.v5_msg.send_table.count; |
1149 | if (count != VRSS_SEND_TAB_SIZE) { | |
1150 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1151 | return; | |
1152 | } | |
1153 | ||
1154 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1155 | nvmsg->msg.v5_msg.send_table.offset); | |
1156 | ||
1157 | for (i = 0; i < count; i++) | |
7ce10124 | 1158 | net_device_ctx->tx_send_table[i] = tab[i]; |
5b54dac8 HZ |
1159 | } |
1160 | ||
f9a7da91 | 1161 | static void netvsc_send_vf(struct net_device_context *net_device_ctx, |
71790a27 HZ |
1162 | struct nvsp_message *nvmsg) |
1163 | { | |
f9a7da91 VK |
1164 | net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
1165 | net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
71790a27 HZ |
1166 | } |
1167 | ||
1168 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
f9a7da91 VK |
1169 | struct net_device_context *net_device_ctx, |
1170 | struct nvsp_message *nvmsg) | |
71790a27 HZ |
1171 | { |
1172 | switch (nvmsg->hdr.msg_type) { | |
1173 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1174 | netvsc_send_table(hdev, nvmsg); | |
1175 | break; | |
1176 | ||
1177 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
f9a7da91 | 1178 | netvsc_send_vf(net_device_ctx, nvmsg); |
71790a27 HZ |
1179 | break; |
1180 | } | |
1181 | } | |
1182 | ||
15a863bf | 1183 | static int netvsc_process_raw_pkt(struct hv_device *device, |
1184 | struct vmbus_channel *channel, | |
1185 | struct netvsc_device *net_device, | |
1186 | struct net_device *ndev, | |
f9645430 | 1187 | const struct vmpacket_descriptor *desc, |
1188 | int budget) | |
99a50bb1 | 1189 | { |
f9a7da91 | 1190 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
f3dd3f47 | 1191 | struct nvsp_message *nvmsg = hv_pkt_data(desc); |
99a50bb1 S |
1192 | |
1193 | switch (desc->type) { | |
1194 | case VM_PKT_COMP: | |
f9645430 | 1195 | netvsc_send_completion(net_device, channel, device, |
1196 | desc, budget); | |
99a50bb1 S |
1197 | break; |
1198 | ||
1199 | case VM_PKT_DATA_USING_XFER_PAGES: | |
15a863bf | 1200 | return netvsc_receive(ndev, net_device, net_device_ctx, |
1201 | device, channel, desc, nvmsg); | |
99a50bb1 S |
1202 | break; |
1203 | ||
1204 | case VM_PKT_DATA_INBAND: | |
f9a7da91 | 1205 | netvsc_receive_inband(device, net_device_ctx, nvmsg); |
99a50bb1 S |
1206 | break; |
1207 | ||
1208 | default: | |
1209 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", | |
f4f1c23d | 1210 | desc->type, desc->trans_id); |
99a50bb1 S |
1211 | break; |
1212 | } | |
15a863bf | 1213 | |
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | static struct hv_device *netvsc_channel_to_device(struct vmbus_channel *channel) | |
1218 | { | |
1219 | struct vmbus_channel *primary = channel->primary_channel; | |
1220 | ||
1221 | return primary ? primary->device_obj : channel->device_obj; | |
1222 | } | |
1223 | ||
262b7f14 | 1224 | /* Network processing softirq |
1225 | * Process data in incoming ring buffer from host | |
1226 | * Stops when ring is empty or budget is met or exceeded. | |
1227 | */ | |
15a863bf | 1228 | int netvsc_poll(struct napi_struct *napi, int budget) |
1229 | { | |
1230 | struct netvsc_channel *nvchan | |
1231 | = container_of(napi, struct netvsc_channel, napi); | |
35fbbccf | 1232 | struct netvsc_device *net_device = nvchan->net_device; |
15a863bf | 1233 | struct vmbus_channel *channel = nvchan->channel; |
1234 | struct hv_device *device = netvsc_channel_to_device(channel); | |
1235 | u16 q_idx = channel->offermsg.offer.sub_channel_index; | |
1236 | struct net_device *ndev = hv_get_drvdata(device); | |
15a863bf | 1237 | int work_done = 0; |
1238 | ||
f4f1c23d | 1239 | /* If starting a new interval */ |
1240 | if (!nvchan->desc) | |
1241 | nvchan->desc = hv_pkt_iter_first(channel); | |
15a863bf | 1242 | |
f4f1c23d | 1243 | while (nvchan->desc && work_done < budget) { |
1244 | work_done += netvsc_process_raw_pkt(device, channel, net_device, | |
f9645430 | 1245 | ndev, nvchan->desc, budget); |
f4f1c23d | 1246 | nvchan->desc = hv_pkt_iter_next(channel, nvchan->desc); |
15a863bf | 1247 | } |
15a863bf | 1248 | |
f4f1c23d | 1249 | /* If receive ring was exhausted |
1250 | * and not doing busy poll | |
262b7f14 | 1251 | * then re-enable host interrupts |
1252 | * and reschedule if ring is not empty. | |
1253 | */ | |
15a863bf | 1254 | if (work_done < budget && |
1255 | napi_complete_done(napi, work_done) && | |
1256 | hv_end_read(&channel->inbound) != 0) | |
1257 | napi_reschedule(napi); | |
1258 | ||
1259 | netvsc_chk_recv_comp(net_device, channel, q_idx); | |
f4f1c23d | 1260 | |
1261 | /* Driver may overshoot since multiple packets per descriptor */ | |
1262 | return min(work_done, budget); | |
99a50bb1 S |
1263 | } |
1264 | ||
262b7f14 | 1265 | /* Call back when data is available in host ring buffer. |
1266 | * Processing is deferred until network softirq (NAPI) | |
1267 | */ | |
5b54dac8 | 1268 | void netvsc_channel_cb(void *context) |
fceaf24a | 1269 | { |
6de38af6 | 1270 | struct netvsc_channel *nvchan = context; |
43bf99ce | 1271 | struct vmbus_channel *channel = nvchan->channel; |
1272 | struct hv_ring_buffer_info *rbi = &channel->inbound; | |
1273 | ||
1274 | /* preload first vmpacket descriptor */ | |
1275 | prefetch(hv_get_ring_buffer(rbi) + rbi->priv_read_index); | |
0b307ebd | 1276 | |
f4f1c23d | 1277 | if (napi_schedule_prep(&nvchan->napi)) { |
1278 | /* disable interupts from host */ | |
43bf99ce | 1279 | hv_begin_read(rbi); |
0d6dd357 | 1280 | |
f4f1c23d | 1281 | __napi_schedule(&nvchan->napi); |
1282 | } | |
fceaf24a | 1283 | } |
af24ce42 | 1284 | |
b637e023 HZ |
1285 | /* |
1286 | * netvsc_device_add - Callback when the device belonging to this | |
1287 | * driver is added | |
1288 | */ | |
9749fed5 | 1289 | struct netvsc_device *netvsc_device_add(struct hv_device *device, |
1290 | const struct netvsc_device_info *device_info) | |
b637e023 | 1291 | { |
88098834 | 1292 | int i, ret = 0; |
2c7f83ca | 1293 | int ring_size = device_info->ring_size; |
b637e023 | 1294 | struct netvsc_device *net_device; |
88098834 VK |
1295 | struct net_device *ndev = hv_get_drvdata(device); |
1296 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1297 | |
88098834 | 1298 | net_device = alloc_net_device(); |
b1c84927 | 1299 | if (!net_device) |
9749fed5 | 1300 | return ERR_PTR(-ENOMEM); |
b637e023 | 1301 | |
5b54dac8 HZ |
1302 | net_device->ring_size = ring_size; |
1303 | ||
15a863bf | 1304 | /* Because the device uses NAPI, all the interrupt batching and |
1305 | * control is done via Net softirq, not the channel handling | |
1306 | */ | |
1307 | set_channel_read_mode(device->channel, HV_CALL_ISR); | |
1308 | ||
bffb1842 S |
1309 | /* If we're reopening the device we may have multiple queues, fill the |
1310 | * chn_table with the default channel to use it before subchannels are | |
1311 | * opened. | |
1312 | * Initialize the channel state before we open; | |
1313 | * we can be interrupted as soon as we open the channel. | |
1314 | */ | |
1315 | ||
1316 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) { | |
1317 | struct netvsc_channel *nvchan = &net_device->chan_table[i]; | |
1318 | ||
1319 | nvchan->channel = device->channel; | |
35fbbccf | 1320 | nvchan->net_device = net_device; |
bffb1842 S |
1321 | } |
1322 | ||
2be0f264 | 1323 | /* Enable NAPI handler before init callbacks */ |
1324 | netif_napi_add(ndev, &net_device->chan_table[0].napi, | |
1325 | netvsc_poll, NAPI_POLL_WEIGHT); | |
1326 | ||
b637e023 | 1327 | /* Open the channel */ |
aae23986 S |
1328 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1329 | ring_size * PAGE_SIZE, NULL, 0, | |
6de38af6 | 1330 | netvsc_channel_cb, |
1331 | net_device->chan_table); | |
b637e023 HZ |
1332 | |
1333 | if (ret != 0) { | |
2be0f264 | 1334 | netif_napi_del(&net_device->chan_table[0].napi); |
d9871158 | 1335 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1336 | goto cleanup; |
1337 | } | |
1338 | ||
1339 | /* Channel is opened */ | |
93ba2222 | 1340 | netdev_dbg(ndev, "hv_netvsc channel opened successfully\n"); |
b637e023 | 1341 | |
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 | 1349 | /* Connect with the NetVsp */ |
95790837 | 1350 | ret = netvsc_connect_vsp(device, net_device); |
b637e023 | 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 | ||
9749fed5 | 1357 | return net_device; |
b637e023 HZ |
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 | 1367 | |
9749fed5 | 1368 | return ERR_PTR(ret); |
b637e023 | 1369 | } |