Commit | Line | Data |
---|---|---|
fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
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 | ||
f90251c8 HZ |
70 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
71 | if (!net_device->cb_buffer) { | |
72 | kfree(net_device); | |
73 | return NULL; | |
74 | } | |
75 | ||
c0b558e5 HZ |
76 | net_device->mrc[0].buf = vzalloc(NETVSC_RECVSLOT_MAX * |
77 | sizeof(struct recv_comp_data)); | |
78 | ||
dc5cd894 | 79 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 80 | net_device->destroy = false; |
84bf9cef | 81 | atomic_set(&net_device->open_cnt, 0); |
7c3877f2 HZ |
82 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
83 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
fd612602 | 84 | init_completion(&net_device->channel_init_wait); |
7c3877f2 | 85 | |
85799a37 | 86 | return net_device; |
fceaf24a HJ |
87 | } |
88 | ||
f90251c8 HZ |
89 | static void free_netvsc_device(struct netvsc_device *nvdev) |
90 | { | |
c0b558e5 HZ |
91 | int i; |
92 | ||
93 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
94 | vfree(nvdev->mrc[i].buf); | |
95 | ||
f90251c8 HZ |
96 | kfree(nvdev->cb_buffer); |
97 | kfree(nvdev); | |
98 | } | |
99 | ||
5a71ae30 | 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); |
fceaf24a | 103 | |
9d88f33a | 104 | if (net_device && net_device->destroy) |
85799a37 | 105 | net_device = NULL; |
fceaf24a | 106 | |
85799a37 | 107 | return net_device; |
fceaf24a HJ |
108 | } |
109 | ||
5a71ae30 | 110 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 111 | { |
2625466d | 112 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
9d88f33a S |
113 | |
114 | if (!net_device) | |
115 | goto get_in_err; | |
116 | ||
117 | if (net_device->destroy && | |
c0b558e5 HZ |
118 | atomic_read(&net_device->num_outstanding_sends) == 0 && |
119 | atomic_read(&net_device->num_outstanding_recvs) == 0) | |
85799a37 | 120 | net_device = NULL; |
fceaf24a | 121 | |
9d88f33a | 122 | get_in_err: |
85799a37 | 123 | return net_device; |
fceaf24a HJ |
124 | } |
125 | ||
7a2a0a84 | 126 | static void netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
127 | { |
128 | struct nvsp_message *revoke_packet; | |
3d541ac5 | 129 | struct net_device *ndev = hv_get_drvdata(device); |
2625466d | 130 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); |
7a2a0a84 | 131 | int ret; |
ec91cd09 HZ |
132 | |
133 | /* | |
134 | * If we got a section count, it means we received a | |
135 | * SendReceiveBufferComplete msg (ie sent | |
136 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
137 | * to send a revoke msg here | |
138 | */ | |
139 | if (net_device->recv_section_cnt) { | |
140 | /* Send the revoke receive buffer */ | |
141 | revoke_packet = &net_device->revoke_packet; | |
142 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
143 | ||
144 | revoke_packet->hdr.msg_type = | |
145 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
146 | revoke_packet->msg.v1_msg. | |
147 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
148 | ||
3d541ac5 | 149 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
150 | revoke_packet, |
151 | sizeof(struct nvsp_message), | |
152 | (unsigned long)revoke_packet, | |
153 | VM_PKT_DATA_INBAND, 0); | |
154 | /* | |
155 | * If we failed here, we might as well return and | |
156 | * have a leak rather than continue and a bugchk | |
157 | */ | |
158 | if (ret != 0) { | |
d9871158 | 159 | netdev_err(ndev, "unable to send " |
c909ebbd | 160 | "revoke receive buffer to netvsp\n"); |
7a2a0a84 | 161 | return; |
ec91cd09 HZ |
162 | } |
163 | } | |
164 | ||
165 | /* Teardown the gpadl on the vsp end */ | |
166 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
167 | ret = vmbus_teardown_gpadl(device->channel, |
168 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
169 | |
170 | /* If we failed here, we might as well return and have a leak | |
171 | * rather than continue and a bugchk | |
172 | */ | |
173 | if (ret != 0) { | |
d9871158 | 174 | netdev_err(ndev, |
c909ebbd | 175 | "unable to teardown receive buffer's gpadl\n"); |
7a2a0a84 | 176 | return; |
ec91cd09 HZ |
177 | } |
178 | net_device->recv_buf_gpadl_handle = 0; | |
179 | } | |
180 | ||
181 | if (net_device->recv_buf) { | |
182 | /* Free up the receive buffer */ | |
b679ef73 | 183 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
184 | net_device->recv_buf = NULL; |
185 | } | |
186 | ||
187 | if (net_device->recv_section) { | |
188 | net_device->recv_section_cnt = 0; | |
189 | kfree(net_device->recv_section); | |
190 | net_device->recv_section = NULL; | |
191 | } | |
192 | ||
c25aaf81 KS |
193 | /* Deal with the send buffer we may have setup. |
194 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
195 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
196 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
197 | * to send a revoke msg here |
198 | */ | |
199 | if (net_device->send_section_size) { | |
200 | /* Send the revoke receive buffer */ | |
201 | revoke_packet = &net_device->revoke_packet; | |
202 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
203 | ||
204 | revoke_packet->hdr.msg_type = | |
205 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
206 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
207 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 208 | |
3d541ac5 | 209 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
210 | revoke_packet, |
211 | sizeof(struct nvsp_message), | |
212 | (unsigned long)revoke_packet, | |
213 | VM_PKT_DATA_INBAND, 0); | |
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; |
0a726c2b | 252 | int node; |
fceaf24a | 253 | |
5a71ae30 | 254 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 255 | if (!net_device) |
927bc33c | 256 | return -ENODEV; |
0a1275ca | 257 | ndev = hv_get_drvdata(device); |
fceaf24a | 258 | |
0a726c2b S |
259 | node = cpu_to_node(device->channel->target_cpu); |
260 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
261 | if (!net_device->recv_buf) | |
262 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
263 | ||
53d21fdb | 264 | if (!net_device->recv_buf) { |
d9871158 | 265 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 266 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 267 | ret = -ENOMEM; |
0c3b7b2f | 268 | goto cleanup; |
fceaf24a | 269 | } |
fceaf24a | 270 | |
454f18a9 BP |
271 | /* |
272 | * Establish the gpadl handle for this buffer on this | |
273 | * channel. Note: This call uses the vmbus connection rather | |
274 | * than the channel to establish the gpadl handle. | |
275 | */ | |
53d21fdb HZ |
276 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
277 | net_device->recv_buf_size, | |
278 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 279 | if (ret != 0) { |
d9871158 | 280 | netdev_err(ndev, |
c909ebbd | 281 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 282 | goto cleanup; |
fceaf24a HJ |
283 | } |
284 | ||
454f18a9 | 285 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 286 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 287 | |
85799a37 | 288 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 289 | |
53d21fdb HZ |
290 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
291 | init_packet->msg.v1_msg.send_recv_buf. | |
292 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
293 | init_packet->msg.v1_msg. | |
294 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 295 | |
454f18a9 | 296 | /* Send the gpadl notification request */ |
85799a37 | 297 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 298 | sizeof(struct nvsp_message), |
85799a37 | 299 | (unsigned long)init_packet, |
415f2287 | 300 | VM_PKT_DATA_INBAND, |
5a4df290 | 301 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 302 | if (ret != 0) { |
d9871158 | 303 | netdev_err(ndev, |
c909ebbd | 304 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 305 | goto cleanup; |
fceaf24a HJ |
306 | } |
307 | ||
5362855a | 308 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 309 | |
454f18a9 | 310 | /* Check the response */ |
53d21fdb HZ |
311 | if (init_packet->msg.v1_msg. |
312 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 313 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 314 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
315 | init_packet->msg.v1_msg. |
316 | send_recv_buf_complete.status); | |
927bc33c | 317 | ret = -EINVAL; |
0c3b7b2f | 318 | goto cleanup; |
fceaf24a HJ |
319 | } |
320 | ||
454f18a9 | 321 | /* Parse the response */ |
fceaf24a | 322 | |
53d21fdb HZ |
323 | net_device->recv_section_cnt = init_packet->msg. |
324 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 325 | |
c1813200 HZ |
326 | net_device->recv_section = kmemdup( |
327 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
328 | net_device->recv_section_cnt * | |
329 | sizeof(struct nvsp_1_receive_buffer_section), | |
330 | GFP_KERNEL); | |
53d21fdb | 331 | if (net_device->recv_section == NULL) { |
927bc33c | 332 | ret = -EINVAL; |
0c3b7b2f | 333 | goto cleanup; |
fceaf24a HJ |
334 | } |
335 | ||
21a80820 GKH |
336 | /* |
337 | * For 1st release, there should only be 1 section that represents the | |
338 | * entire receive buffer | |
339 | */ | |
53d21fdb HZ |
340 | if (net_device->recv_section_cnt != 1 || |
341 | net_device->recv_section->offset != 0) { | |
927bc33c | 342 | ret = -EINVAL; |
0c3b7b2f | 343 | goto cleanup; |
fceaf24a HJ |
344 | } |
345 | ||
c25aaf81 KS |
346 | /* Now setup the send buffer. |
347 | */ | |
5defde59 S |
348 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
349 | if (!net_device->send_buf) | |
350 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
351 | if (!net_device->send_buf) { |
352 | netdev_err(ndev, "unable to allocate send " | |
353 | "buffer of size %d\n", net_device->send_buf_size); | |
354 | ret = -ENOMEM; | |
355 | goto cleanup; | |
356 | } | |
357 | ||
358 | /* Establish the gpadl handle for this buffer on this | |
359 | * channel. Note: This call uses the vmbus connection rather | |
360 | * than the channel to establish the gpadl handle. | |
361 | */ | |
362 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
363 | net_device->send_buf_size, | |
364 | &net_device->send_buf_gpadl_handle); | |
365 | if (ret != 0) { | |
366 | netdev_err(ndev, | |
367 | "unable to establish send buffer's gpadl\n"); | |
368 | goto cleanup; | |
369 | } | |
370 | ||
371 | /* Notify the NetVsp of the gpadl handle */ | |
372 | init_packet = &net_device->channel_init_pkt; | |
373 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
374 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 375 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 376 | net_device->send_buf_gpadl_handle; |
c51ed182 | 377 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
378 | |
379 | /* Send the gpadl notification request */ | |
380 | ret = vmbus_sendpacket(device->channel, init_packet, | |
381 | sizeof(struct nvsp_message), | |
382 | (unsigned long)init_packet, | |
383 | VM_PKT_DATA_INBAND, | |
384 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
385 | if (ret != 0) { | |
386 | netdev_err(ndev, | |
387 | "unable to send send buffer's gpadl to netvsp\n"); | |
388 | goto cleanup; | |
389 | } | |
390 | ||
5362855a | 391 | wait_for_completion(&net_device->channel_init_wait); |
c25aaf81 KS |
392 | |
393 | /* Check the response */ | |
394 | if (init_packet->msg.v1_msg. | |
395 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
396 | netdev_err(ndev, "Unable to complete send buffer " | |
397 | "initialization with NetVsp - status %d\n", | |
398 | init_packet->msg.v1_msg. | |
c51ed182 | 399 | send_send_buf_complete.status); |
c25aaf81 KS |
400 | ret = -EINVAL; |
401 | goto cleanup; | |
402 | } | |
403 | ||
404 | /* Parse the response */ | |
405 | net_device->send_section_size = init_packet->msg. | |
406 | v1_msg.send_send_buf_complete.section_size; | |
407 | ||
408 | /* Section count is simply the size divided by the section size. | |
409 | */ | |
410 | net_device->send_section_cnt = | |
796cc88c | 411 | net_device->send_buf_size / net_device->send_section_size; |
c25aaf81 KS |
412 | |
413 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
414 | net_device->send_section_size, net_device->send_section_cnt); | |
415 | ||
416 | /* Setup state for managing the send buffer. */ | |
417 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
418 | BITS_PER_LONG); | |
419 | ||
e53a9c2a SH |
420 | net_device->send_section_map = kcalloc(net_device->map_words, |
421 | sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
422 | if (net_device->send_section_map == NULL) { |
423 | ret = -ENOMEM; | |
c25aaf81 | 424 | goto cleanup; |
dd1d3f8f | 425 | } |
c25aaf81 | 426 | |
0c3b7b2f | 427 | goto exit; |
fceaf24a | 428 | |
0c3b7b2f | 429 | cleanup: |
3d541ac5 | 430 | netvsc_destroy_buf(device); |
fceaf24a | 431 | |
0c3b7b2f | 432 | exit: |
fceaf24a HJ |
433 | return ret; |
434 | } | |
435 | ||
f157e78d HZ |
436 | /* Negotiate NVSP protocol version */ |
437 | static int negotiate_nvsp_ver(struct hv_device *device, | |
438 | struct netvsc_device *net_device, | |
439 | struct nvsp_message *init_packet, | |
440 | u32 nvsp_ver) | |
fceaf24a | 441 | { |
0a1275ca | 442 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c | 443 | int ret; |
fceaf24a | 444 | |
85799a37 | 445 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 446 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
447 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
448 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 449 | |
454f18a9 | 450 | /* Send the init request */ |
85799a37 | 451 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 452 | sizeof(struct nvsp_message), |
85799a37 | 453 | (unsigned long)init_packet, |
415f2287 | 454 | VM_PKT_DATA_INBAND, |
5a4df290 | 455 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 456 | |
b8a3d52b | 457 | if (ret != 0) |
f157e78d | 458 | return ret; |
fceaf24a | 459 | |
5362855a | 460 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 461 | |
53d21fdb | 462 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
463 | NVSP_STAT_SUCCESS) |
464 | return -EINVAL; | |
fceaf24a | 465 | |
a1eabb01 | 466 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
467 | return 0; |
468 | ||
71790a27 | 469 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
470 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
471 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 472 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 473 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 474 | |
7f5d5af0 | 475 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) { |
71790a27 HZ |
476 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
477 | ||
7f5d5af0 HZ |
478 | /* Teaming bit is needed to receive link speed updates */ |
479 | init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1; | |
480 | } | |
481 | ||
f157e78d HZ |
482 | ret = vmbus_sendpacket(device->channel, init_packet, |
483 | sizeof(struct nvsp_message), | |
484 | (unsigned long)init_packet, | |
485 | VM_PKT_DATA_INBAND, 0); | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | static int netvsc_connect_vsp(struct hv_device *device) | |
491 | { | |
492 | int ret; | |
493 | struct netvsc_device *net_device; | |
494 | struct nvsp_message *init_packet; | |
495 | int ndis_version; | |
e5a78fad SH |
496 | const u32 ver_list[] = { |
497 | NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, | |
a1eabb01 | 498 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; |
e5a78fad | 499 | int i; |
f157e78d HZ |
500 | |
501 | net_device = get_outbound_net_device(device); | |
502 | if (!net_device) | |
503 | return -ENODEV; | |
f157e78d HZ |
504 | |
505 | init_packet = &net_device->channel_init_pkt; | |
506 | ||
507 | /* Negotiate the latest NVSP protocol supported */ | |
e5a78fad | 508 | for (i = ARRAY_SIZE(ver_list) - 1; i >= 0; i--) |
a1eabb01 HZ |
509 | if (negotiate_nvsp_ver(device, net_device, init_packet, |
510 | ver_list[i]) == 0) { | |
511 | net_device->nvsp_version = ver_list[i]; | |
512 | break; | |
513 | } | |
514 | ||
515 | if (i < 0) { | |
0f48c72c | 516 | ret = -EPROTO; |
0c3b7b2f | 517 | goto cleanup; |
fceaf24a | 518 | } |
f157e78d HZ |
519 | |
520 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
521 | ||
454f18a9 | 522 | /* Send the ndis version */ |
85799a37 | 523 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 524 | |
a1eabb01 | 525 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 526 | ndis_version = 0x00060001; |
a1eabb01 HZ |
527 | else |
528 | ndis_version = 0x0006001e; | |
fceaf24a | 529 | |
53d21fdb HZ |
530 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
531 | init_packet->msg.v1_msg. | |
532 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 533 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
534 | init_packet->msg.v1_msg. |
535 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 536 | ndis_version & 0xFFFF; |
fceaf24a | 537 | |
454f18a9 | 538 | /* Send the init request */ |
85799a37 | 539 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
540 | sizeof(struct nvsp_message), |
541 | (unsigned long)init_packet, | |
542 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 543 | if (ret != 0) |
0c3b7b2f | 544 | goto cleanup; |
454f18a9 BP |
545 | |
546 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
547 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
548 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
549 | else | |
550 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 551 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 552 | |
c25aaf81 | 553 | ret = netvsc_init_buf(device); |
fceaf24a | 554 | |
0c3b7b2f | 555 | cleanup: |
fceaf24a HJ |
556 | return ret; |
557 | } | |
558 | ||
3d541ac5 | 559 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 560 | { |
3d541ac5 | 561 | netvsc_destroy_buf(device); |
fceaf24a HJ |
562 | } |
563 | ||
3e189519 | 564 | /* |
5a71ae30 | 565 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 566 | */ |
e08f3ea5 | 567 | void netvsc_device_remove(struct hv_device *device) |
fceaf24a | 568 | { |
3d541ac5 VK |
569 | struct net_device *ndev = hv_get_drvdata(device); |
570 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
571 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
fceaf24a | 572 | |
3d541ac5 | 573 | netvsc_disconnect_vsp(device); |
9d88f33a | 574 | |
3d541ac5 | 575 | 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 | */ | |
c909ebbd | 581 | dev_notice(&device->device, "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 | |
454f18a9 | 586 | /* Release all resources */ |
aa99c479 | 587 | vfree(net_device->sub_cb_buf); |
f90251c8 | 588 | free_netvsc_device(net_device); |
fceaf24a HJ |
589 | } |
590 | ||
33be96e4 HZ |
591 | #define RING_AVAIL_PERCENT_HIWATER 20 |
592 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
593 | ||
594 | /* | |
595 | * Get the percentage of available bytes to write in the ring. | |
596 | * The return value is in range from 0 to 100. | |
597 | */ | |
598 | static inline u32 hv_ringbuf_avail_percent( | |
599 | struct hv_ring_buffer_info *ring_info) | |
600 | { | |
601 | u32 avail_read, avail_write; | |
602 | ||
603 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
604 | ||
605 | return avail_write * 100 / ring_info->ring_datasize; | |
606 | } | |
607 | ||
c25aaf81 KS |
608 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
609 | u32 index) | |
610 | { | |
611 | sync_change_bit(index, net_device->send_section_map); | |
612 | } | |
613 | ||
bc304dd3 SH |
614 | static void netvsc_send_tx_complete(struct netvsc_device *net_device, |
615 | struct vmbus_channel *incoming_channel, | |
616 | struct hv_device *device, | |
617 | struct vmpacket_descriptor *packet) | |
618 | { | |
619 | struct sk_buff *skb = (struct sk_buff *)(unsigned long)packet->trans_id; | |
620 | struct net_device *ndev = hv_get_drvdata(device); | |
621 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
622 | struct vmbus_channel *channel = device->channel; | |
623 | int num_outstanding_sends; | |
624 | u16 q_idx = 0; | |
625 | int queue_sends; | |
626 | ||
627 | /* Notify the layer above us */ | |
628 | if (likely(skb)) { | |
629 | struct hv_netvsc_packet *nvsc_packet | |
630 | = (struct hv_netvsc_packet *)skb->cb; | |
631 | u32 send_index = nvsc_packet->send_buf_index; | |
632 | ||
633 | if (send_index != NETVSC_INVALID_INDEX) | |
634 | netvsc_free_send_slot(net_device, send_index); | |
635 | q_idx = nvsc_packet->q_idx; | |
636 | channel = incoming_channel; | |
637 | ||
638 | dev_kfree_skb_any(skb); | |
639 | } | |
640 | ||
641 | num_outstanding_sends = | |
642 | atomic_dec_return(&net_device->num_outstanding_sends); | |
643 | queue_sends = atomic_dec_return(&net_device->queue_sends[q_idx]); | |
644 | ||
645 | if (net_device->destroy && num_outstanding_sends == 0) | |
646 | wake_up(&net_device->wait_drain); | |
647 | ||
648 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && | |
649 | !net_device_ctx->start_remove && | |
650 | (hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER || | |
651 | queue_sends < 1)) | |
652 | netif_tx_wake_queue(netdev_get_tx_queue(ndev, q_idx)); | |
653 | } | |
654 | ||
97c1723a | 655 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 656 | struct vmbus_channel *incoming_channel, |
97c1723a | 657 | struct hv_device *device, |
85799a37 | 658 | struct vmpacket_descriptor *packet) |
fceaf24a | 659 | { |
85799a37 | 660 | struct nvsp_message *nvsp_packet; |
3d541ac5 | 661 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 662 | |
85799a37 | 663 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
bc304dd3 SH |
664 | (packet->offset8 << 3)); |
665 | ||
666 | switch (nvsp_packet->hdr.msg_type) { | |
667 | case NVSP_MSG_TYPE_INIT_COMPLETE: | |
668 | case NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE: | |
669 | case NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE: | |
670 | case NVSP_MSG5_TYPE_SUBCHANNEL: | |
454f18a9 | 671 | /* Copy the response back */ |
53d21fdb | 672 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 673 | sizeof(struct nvsp_message)); |
35abb21a | 674 | complete(&net_device->channel_init_wait); |
bc304dd3 SH |
675 | break; |
676 | ||
677 | case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: | |
678 | netvsc_send_tx_complete(net_device, incoming_channel, | |
679 | device, packet); | |
680 | break; | |
fceaf24a | 681 | |
bc304dd3 SH |
682 | default: |
683 | netdev_err(ndev, | |
684 | "Unknown send completion type %d received!!\n", | |
685 | nvsp_packet->hdr.msg_type); | |
fceaf24a | 686 | } |
fceaf24a HJ |
687 | } |
688 | ||
c25aaf81 KS |
689 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
690 | { | |
691 | unsigned long index; | |
692 | u32 max_words = net_device->map_words; | |
693 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
694 | u32 section_cnt = net_device->send_section_cnt; | |
695 | int ret_val = NETVSC_INVALID_INDEX; | |
696 | int i; | |
697 | int prev_val; | |
698 | ||
699 | for (i = 0; i < max_words; i++) { | |
700 | if (!~(map_addr[i])) | |
701 | continue; | |
702 | index = ffz(map_addr[i]); | |
703 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
704 | if (prev_val) | |
705 | continue; | |
706 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
707 | break; | |
708 | ret_val = (index + (i * BITS_PER_LONG)); | |
709 | break; | |
710 | } | |
711 | return ret_val; | |
712 | } | |
713 | ||
da19fcd0 LP |
714 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
715 | unsigned int section_index, | |
7c3877f2 | 716 | u32 pend_size, |
24476760 | 717 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 718 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
719 | struct hv_page_buffer **pb, |
720 | struct sk_buff *skb) | |
c25aaf81 KS |
721 | { |
722 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
723 | char *dest = start + (section_index * net_device->send_section_size) |
724 | + pend_size; | |
c25aaf81 | 725 | int i; |
694a9fb0 | 726 | bool is_data_pkt = (skb != NULL) ? true : false; |
bde79be5 | 727 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 728 | u32 msg_size = 0; |
7c3877f2 HZ |
729 | u32 padding = 0; |
730 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
731 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
732 | packet->page_buf_cnt; | |
7c3877f2 HZ |
733 | |
734 | /* Add padding */ | |
bde79be5 | 735 | if (is_data_pkt && xmit_more && remain && |
aa0a34be | 736 | !packet->cp_partial) { |
7c3877f2 | 737 | padding = net_device->pkt_align - remain; |
24476760 | 738 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
739 | packet->total_data_buflen += padding; |
740 | } | |
c25aaf81 | 741 | |
aa0a34be | 742 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
743 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
744 | u32 offset = (*pb)[i].offset; | |
745 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
746 | |
747 | memcpy(dest, (src + offset), len); | |
748 | msg_size += len; | |
749 | dest += len; | |
750 | } | |
7c3877f2 HZ |
751 | |
752 | if (padding) { | |
753 | memset(dest, 0, padding); | |
754 | msg_size += padding; | |
755 | } | |
756 | ||
c25aaf81 KS |
757 | return msg_size; |
758 | } | |
759 | ||
3a8963ac | 760 | static inline int netvsc_send_pkt( |
0a1275ca | 761 | struct hv_device *device, |
7c3877f2 | 762 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 763 | struct netvsc_device *net_device, |
3a3d9a0a KS |
764 | struct hv_page_buffer **pb, |
765 | struct sk_buff *skb) | |
fceaf24a | 766 | { |
7c3877f2 | 767 | struct nvsp_message nvmsg; |
3a67c9cc | 768 | u16 q_idx = packet->q_idx; |
8b9fbe1a | 769 | struct vmbus_channel *out_channel = net_device->chn_table[q_idx]; |
0a1275ca | 770 | struct net_device *ndev = hv_get_drvdata(device); |
7c3877f2 HZ |
771 | u64 req_id; |
772 | int ret; | |
aa0a34be | 773 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 774 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
bde79be5 | 775 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 776 | |
7c3877f2 | 777 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 778 | if (skb != NULL) { |
21a80820 | 779 | /* 0 is RMC_DATA; */ |
7c3877f2 | 780 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
781 | } else { |
782 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 783 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 784 | } |
fceaf24a | 785 | |
7c3877f2 HZ |
786 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
787 | packet->send_buf_index; | |
788 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
789 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
790 | else | |
791 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
792 | packet->total_data_buflen; | |
21a80820 | 793 | |
3a3d9a0a | 794 | req_id = (ulong)skb; |
f1ea3cd7 | 795 | |
c3582a2c HZ |
796 | if (out_channel->rescind) |
797 | return -ENODEV; | |
798 | ||
82fa3c77 KS |
799 | /* |
800 | * It is possible that once we successfully place this packet | |
801 | * on the ringbuffer, we may stop the queue. In that case, we want | |
802 | * to notify the host independent of the xmit_more flag. We don't | |
803 | * need to be precise here; in the worst case we may signal the host | |
804 | * unnecessarily. | |
805 | */ | |
806 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) | |
bde79be5 | 807 | xmit_more = false; |
82fa3c77 | 808 | |
72a2f5bd | 809 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
810 | pgbuf = packet->cp_partial ? (*pb) + |
811 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
812 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
813 | pgbuf, | |
814 | packet->page_buf_cnt, | |
815 | &nvmsg, | |
816 | sizeof(struct nvsp_message), | |
817 | req_id, | |
818 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 819 | !xmit_more); |
21a80820 | 820 | } else { |
82fa3c77 KS |
821 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
822 | sizeof(struct nvsp_message), | |
823 | req_id, | |
824 | VM_PKT_DATA_INBAND, | |
825 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 826 | !xmit_more); |
fceaf24a HJ |
827 | } |
828 | ||
1d06825b HZ |
829 | if (ret == 0) { |
830 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 831 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 | 832 | |
82fa3c77 KS |
833 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
834 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); | |
5b54dac8 | 835 | |
33be96e4 | 836 | if (atomic_read(&net_device-> |
3a67c9cc | 837 | queue_sends[q_idx]) < 1) |
5b54dac8 | 838 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 839 | ndev, q_idx)); |
33be96e4 | 840 | } |
1d06825b | 841 | } else if (ret == -EAGAIN) { |
5b54dac8 | 842 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
843 | ndev, q_idx)); |
844 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 845 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 846 | ndev, q_idx)); |
33be96e4 HZ |
847 | ret = -ENOSPC; |
848 | } | |
1d06825b | 849 | } else { |
d9871158 | 850 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 851 | packet, ret); |
1d06825b | 852 | } |
fceaf24a | 853 | |
7c3877f2 HZ |
854 | return ret; |
855 | } | |
856 | ||
c85e4924 HZ |
857 | /* Move packet out of multi send data (msd), and clear msd */ |
858 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
859 | struct sk_buff **msd_skb, | |
860 | struct multi_send_data *msdp) | |
861 | { | |
862 | *msd_skb = msdp->skb; | |
863 | *msd_send = msdp->pkt; | |
864 | msdp->skb = NULL; | |
865 | msdp->pkt = NULL; | |
866 | msdp->count = 0; | |
867 | } | |
868 | ||
7c3877f2 | 869 | int netvsc_send(struct hv_device *device, |
24476760 | 870 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 871 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
872 | struct hv_page_buffer **pb, |
873 | struct sk_buff *skb) | |
7c3877f2 HZ |
874 | { |
875 | struct netvsc_device *net_device; | |
6c4c137e | 876 | int ret = 0; |
7c3877f2 HZ |
877 | struct vmbus_channel *out_channel; |
878 | u16 q_idx = packet->q_idx; | |
879 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
880 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
881 | struct multi_send_data *msdp; |
882 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 883 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 884 | bool try_batch; |
bde79be5 | 885 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
886 | |
887 | net_device = get_outbound_net_device(device); | |
888 | if (!net_device) | |
889 | return -ENODEV; | |
890 | ||
8b9fbe1a | 891 | out_channel = net_device->chn_table[q_idx]; |
25b85ee8 | 892 | |
7c3877f2 | 893 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 894 | packet->cp_partial = false; |
7c3877f2 | 895 | |
cf8190e4 HZ |
896 | /* Send control message directly without accessing msd (Multi-Send |
897 | * Data) field which may be changed during data packet processing. | |
898 | */ | |
899 | if (!skb) { | |
900 | cur_send = packet; | |
901 | goto send_now; | |
902 | } | |
903 | ||
7c3877f2 HZ |
904 | msdp = &net_device->msd[q_idx]; |
905 | ||
906 | /* batch packets in send buffer if possible */ | |
7c3877f2 HZ |
907 | if (msdp->pkt) |
908 | msd_len = msdp->pkt->total_data_buflen; | |
909 | ||
694a9fb0 | 910 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
aa0a34be HZ |
911 | net_device->max_pkt; |
912 | ||
913 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
914 | net_device->send_section_size) { |
915 | section_index = msdp->pkt->send_buf_index; | |
916 | ||
aa0a34be HZ |
917 | } else if (try_batch && msd_len + packet->rmsg_size < |
918 | net_device->send_section_size) { | |
919 | section_index = msdp->pkt->send_buf_index; | |
920 | packet->cp_partial = true; | |
921 | ||
694a9fb0 | 922 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
7c3877f2 HZ |
923 | net_device->send_section_size) { |
924 | section_index = netvsc_get_next_send_section(net_device); | |
925 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
926 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
927 | msd_len = 0; | |
7c3877f2 HZ |
928 | } |
929 | } | |
930 | ||
931 | if (section_index != NETVSC_INVALID_INDEX) { | |
932 | netvsc_copy_to_send_buf(net_device, | |
933 | section_index, msd_len, | |
694a9fb0 | 934 | packet, rndis_msg, pb, skb); |
b08cc791 | 935 | |
7c3877f2 | 936 | packet->send_buf_index = section_index; |
aa0a34be HZ |
937 | |
938 | if (packet->cp_partial) { | |
939 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
940 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
941 | } else { | |
942 | packet->page_buf_cnt = 0; | |
943 | packet->total_data_buflen += msd_len; | |
aa0a34be | 944 | } |
7c3877f2 | 945 | |
c85e4924 HZ |
946 | if (msdp->skb) |
947 | dev_kfree_skb_any(msdp->skb); | |
ee90b812 | 948 | |
bde79be5 | 949 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 950 | msdp->skb = skb; |
7c3877f2 HZ |
951 | msdp->pkt = packet; |
952 | msdp->count++; | |
953 | } else { | |
954 | cur_send = packet; | |
c85e4924 | 955 | msdp->skb = NULL; |
7c3877f2 HZ |
956 | msdp->pkt = NULL; |
957 | msdp->count = 0; | |
958 | } | |
959 | } else { | |
c85e4924 | 960 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
961 | cur_send = packet; |
962 | } | |
963 | ||
7c3877f2 | 964 | if (msd_send) { |
6c4c137e SH |
965 | int m_ret = netvsc_send_pkt(device, msd_send, net_device, |
966 | NULL, msd_skb); | |
7c3877f2 HZ |
967 | |
968 | if (m_ret != 0) { | |
969 | netvsc_free_send_slot(net_device, | |
970 | msd_send->send_buf_index); | |
c85e4924 | 971 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
972 | } |
973 | } | |
974 | ||
cf8190e4 | 975 | send_now: |
7c3877f2 | 976 | if (cur_send) |
0a1275ca | 977 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 978 | |
7aab5159 JS |
979 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
980 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 981 | |
fceaf24a HJ |
982 | return ret; |
983 | } | |
984 | ||
c0b558e5 HZ |
985 | static int netvsc_send_recv_completion(struct vmbus_channel *channel, |
986 | u64 transaction_id, u32 status) | |
5fa9d3c5 HZ |
987 | { |
988 | struct nvsp_message recvcompMessage; | |
5fa9d3c5 HZ |
989 | int ret; |
990 | ||
991 | recvcompMessage.hdr.msg_type = | |
992 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
993 | ||
63f6921d | 994 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 | 995 | |
5fa9d3c5 | 996 | /* Send the completion */ |
5b54dac8 | 997 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
c0b558e5 HZ |
998 | sizeof(struct nvsp_message_header) + sizeof(u32), |
999 | transaction_id, VM_PKT_COMP, 0); | |
1000 | ||
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static inline void count_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx, | |
1005 | u32 *filled, u32 *avail) | |
1006 | { | |
1007 | u32 first = nvdev->mrc[q_idx].first; | |
1008 | u32 next = nvdev->mrc[q_idx].next; | |
1009 | ||
1010 | *filled = (first > next) ? NETVSC_RECVSLOT_MAX - first + next : | |
1011 | next - first; | |
1012 | ||
1013 | *avail = NETVSC_RECVSLOT_MAX - *filled - 1; | |
1014 | } | |
1015 | ||
1016 | /* Read the first filled slot, no change to index */ | |
1017 | static inline struct recv_comp_data *read_recv_comp_slot(struct netvsc_device | |
1018 | *nvdev, u16 q_idx) | |
1019 | { | |
1020 | u32 filled, avail; | |
1021 | ||
1022 | if (!nvdev->mrc[q_idx].buf) | |
1023 | return NULL; | |
1024 | ||
1025 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1026 | if (!filled) | |
1027 | return NULL; | |
1028 | ||
1029 | return nvdev->mrc[q_idx].buf + nvdev->mrc[q_idx].first * | |
1030 | sizeof(struct recv_comp_data); | |
1031 | } | |
1032 | ||
1033 | /* Put the first filled slot back to available pool */ | |
1034 | static inline void put_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx) | |
1035 | { | |
1036 | int num_recv; | |
1037 | ||
1038 | nvdev->mrc[q_idx].first = (nvdev->mrc[q_idx].first + 1) % | |
1039 | NETVSC_RECVSLOT_MAX; | |
1040 | ||
1041 | num_recv = atomic_dec_return(&nvdev->num_outstanding_recvs); | |
1042 | ||
1043 | if (nvdev->destroy && num_recv == 0) | |
1044 | wake_up(&nvdev->wait_drain); | |
1045 | } | |
1046 | ||
1047 | /* Check and send pending recv completions */ | |
1048 | static void netvsc_chk_recv_comp(struct netvsc_device *nvdev, | |
1049 | struct vmbus_channel *channel, u16 q_idx) | |
1050 | { | |
1051 | struct recv_comp_data *rcd; | |
1052 | int ret; | |
1053 | ||
1054 | while (true) { | |
1055 | rcd = read_recv_comp_slot(nvdev, q_idx); | |
1056 | if (!rcd) | |
1057 | break; | |
1058 | ||
1059 | ret = netvsc_send_recv_completion(channel, rcd->tid, | |
1060 | rcd->status); | |
1061 | if (ret) | |
1062 | break; | |
1063 | ||
1064 | put_recv_comp_slot(nvdev, q_idx); | |
5fa9d3c5 HZ |
1065 | } |
1066 | } | |
1067 | ||
c0b558e5 HZ |
1068 | #define NETVSC_RCD_WATERMARK 80 |
1069 | ||
1070 | /* Get next available slot */ | |
1071 | static inline struct recv_comp_data *get_recv_comp_slot( | |
1072 | struct netvsc_device *nvdev, struct vmbus_channel *channel, u16 q_idx) | |
1073 | { | |
1074 | u32 filled, avail, next; | |
1075 | struct recv_comp_data *rcd; | |
1076 | ||
1077 | if (!nvdev->recv_section) | |
1078 | return NULL; | |
1079 | ||
1080 | if (!nvdev->mrc[q_idx].buf) | |
1081 | return NULL; | |
1082 | ||
1083 | if (atomic_read(&nvdev->num_outstanding_recvs) > | |
1084 | nvdev->recv_section->num_sub_allocs * NETVSC_RCD_WATERMARK / 100) | |
1085 | netvsc_chk_recv_comp(nvdev, channel, q_idx); | |
1086 | ||
1087 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1088 | if (!avail) | |
1089 | return NULL; | |
1090 | ||
1091 | next = nvdev->mrc[q_idx].next; | |
1092 | rcd = nvdev->mrc[q_idx].buf + next * sizeof(struct recv_comp_data); | |
1093 | nvdev->mrc[q_idx].next = (next + 1) % NETVSC_RECVSLOT_MAX; | |
1094 | ||
1095 | atomic_inc(&nvdev->num_outstanding_recvs); | |
1096 | ||
1097 | return rcd; | |
1098 | } | |
1099 | ||
97c1723a | 1100 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 1101 | struct vmbus_channel *channel, |
97c1723a KS |
1102 | struct hv_device *device, |
1103 | struct vmpacket_descriptor *packet) | |
fceaf24a | 1104 | { |
85799a37 HZ |
1105 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
1106 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
1107 | struct hv_netvsc_packet nv_pkt; |
1108 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
1109 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
1110 | int i; |
1111 | int count = 0; | |
0a1275ca | 1112 | struct net_device *ndev = hv_get_drvdata(device); |
c4b20c63 | 1113 | void *data; |
c0b558e5 HZ |
1114 | int ret; |
1115 | struct recv_comp_data *rcd; | |
1116 | u16 q_idx = channel->offermsg.offer.sub_channel_index; | |
779b4d17 | 1117 | |
21a80820 GKH |
1118 | /* |
1119 | * All inbound packets other than send completion should be xfer page | |
1120 | * packet | |
1121 | */ | |
415f2287 | 1122 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 1123 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 1124 | packet->type); |
fceaf24a HJ |
1125 | return; |
1126 | } | |
1127 | ||
85799a37 | 1128 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1129 | (packet->offset8 << 3)); |
fceaf24a | 1130 | |
454f18a9 | 1131 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1132 | if (nvsp_packet->hdr.msg_type != |
1133 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 1134 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 1135 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
1136 | return; |
1137 | } | |
1138 | ||
85799a37 | 1139 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1140 | |
415f2287 | 1141 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 1142 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 1143 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 1144 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
1145 | return; |
1146 | } | |
1147 | ||
4baab261 | 1148 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1149 | |
454f18a9 | 1150 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1151 | for (i = 0; i < count; i++) { |
454f18a9 | 1152 | /* Initialize the netvsc packet */ |
c4b20c63 | 1153 | data = (void *)((unsigned long)net_device-> |
45326342 | 1154 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); |
72a2f5bd | 1155 | netvsc_packet->total_data_buflen = |
415f2287 | 1156 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1157 | |
454f18a9 | 1158 | /* Pass it to the upper layer */ |
10082f98 KS |
1159 | status = rndis_filter_receive(device, netvsc_packet, &data, |
1160 | channel); | |
fceaf24a HJ |
1161 | } |
1162 | ||
c0b558e5 HZ |
1163 | if (!net_device->mrc[q_idx].buf) { |
1164 | ret = netvsc_send_recv_completion(channel, | |
1165 | vmxferpage_packet->d.trans_id, | |
1166 | status); | |
1167 | if (ret) | |
1168 | netdev_err(ndev, "Recv_comp q:%hd, tid:%llx, err:%d\n", | |
1169 | q_idx, vmxferpage_packet->d.trans_id, ret); | |
1170 | return; | |
1171 | } | |
1172 | ||
1173 | rcd = get_recv_comp_slot(net_device, channel, q_idx); | |
1174 | ||
1175 | if (!rcd) { | |
1176 | netdev_err(ndev, "Recv_comp full buf q:%hd, tid:%llx\n", | |
1177 | q_idx, vmxferpage_packet->d.trans_id); | |
1178 | return; | |
1179 | } | |
1180 | ||
1181 | rcd->tid = vmxferpage_packet->d.trans_id; | |
1182 | rcd->status = status; | |
fceaf24a HJ |
1183 | } |
1184 | ||
5b54dac8 | 1185 | static void netvsc_send_table(struct hv_device *hdev, |
71790a27 | 1186 | struct nvsp_message *nvmsg) |
5b54dac8 HZ |
1187 | { |
1188 | struct netvsc_device *nvscdev; | |
0a1275ca | 1189 | struct net_device *ndev = hv_get_drvdata(hdev); |
5b54dac8 HZ |
1190 | int i; |
1191 | u32 count, *tab; | |
1192 | ||
1193 | nvscdev = get_outbound_net_device(hdev); | |
1194 | if (!nvscdev) | |
1195 | return; | |
5b54dac8 | 1196 | |
5b54dac8 HZ |
1197 | count = nvmsg->msg.v5_msg.send_table.count; |
1198 | if (count != VRSS_SEND_TAB_SIZE) { | |
1199 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1200 | return; | |
1201 | } | |
1202 | ||
1203 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1204 | nvmsg->msg.v5_msg.send_table.offset); | |
1205 | ||
1206 | for (i = 0; i < count; i++) | |
1207 | nvscdev->send_table[i] = tab[i]; | |
1208 | } | |
1209 | ||
f9a7da91 | 1210 | static void netvsc_send_vf(struct net_device_context *net_device_ctx, |
71790a27 HZ |
1211 | struct nvsp_message *nvmsg) |
1212 | { | |
f9a7da91 VK |
1213 | net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
1214 | net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
71790a27 HZ |
1215 | } |
1216 | ||
1217 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
f9a7da91 VK |
1218 | struct net_device_context *net_device_ctx, |
1219 | struct nvsp_message *nvmsg) | |
71790a27 HZ |
1220 | { |
1221 | switch (nvmsg->hdr.msg_type) { | |
1222 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1223 | netvsc_send_table(hdev, nvmsg); | |
1224 | break; | |
1225 | ||
1226 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
f9a7da91 | 1227 | netvsc_send_vf(net_device_ctx, nvmsg); |
71790a27 HZ |
1228 | break; |
1229 | } | |
1230 | } | |
1231 | ||
99a50bb1 S |
1232 | static void netvsc_process_raw_pkt(struct hv_device *device, |
1233 | struct vmbus_channel *channel, | |
1234 | struct netvsc_device *net_device, | |
1235 | struct net_device *ndev, | |
1236 | u64 request_id, | |
1237 | struct vmpacket_descriptor *desc) | |
1238 | { | |
1239 | struct nvsp_message *nvmsg; | |
f9a7da91 | 1240 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
99a50bb1 S |
1241 | |
1242 | nvmsg = (struct nvsp_message *)((unsigned long) | |
1243 | desc + (desc->offset8 << 3)); | |
1244 | ||
1245 | switch (desc->type) { | |
1246 | case VM_PKT_COMP: | |
1247 | netvsc_send_completion(net_device, channel, device, desc); | |
1248 | break; | |
1249 | ||
1250 | case VM_PKT_DATA_USING_XFER_PAGES: | |
1251 | netvsc_receive(net_device, channel, device, desc); | |
1252 | break; | |
1253 | ||
1254 | case VM_PKT_DATA_INBAND: | |
f9a7da91 | 1255 | netvsc_receive_inband(device, net_device_ctx, nvmsg); |
99a50bb1 S |
1256 | break; |
1257 | ||
1258 | default: | |
1259 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", | |
1260 | desc->type, request_id); | |
1261 | break; | |
1262 | } | |
1263 | } | |
1264 | ||
5b54dac8 | 1265 | void netvsc_channel_cb(void *context) |
fceaf24a | 1266 | { |
21a80820 | 1267 | int ret; |
5b54dac8 | 1268 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
c0b558e5 | 1269 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
5b54dac8 | 1270 | struct hv_device *device; |
85799a37 HZ |
1271 | struct netvsc_device *net_device; |
1272 | u32 bytes_recvd; | |
1273 | u64 request_id; | |
8dc0a06a | 1274 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1275 | unsigned char *buffer; |
1276 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1277 | struct net_device *ndev; |
99a50bb1 | 1278 | bool need_to_commit = false; |
fceaf24a | 1279 | |
5b54dac8 HZ |
1280 | if (channel->primary_channel != NULL) |
1281 | device = channel->primary_channel->device_obj; | |
1282 | else | |
1283 | device = channel->device_obj; | |
1284 | ||
5a71ae30 | 1285 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1286 | if (!net_device) |
ee0c4c39 | 1287 | return; |
0a1275ca | 1288 | ndev = hv_get_drvdata(device); |
5b54dac8 | 1289 | buffer = get_per_channel_state(channel); |
fceaf24a | 1290 | |
21a80820 | 1291 | do { |
99a50bb1 S |
1292 | desc = get_next_pkt_raw(channel); |
1293 | if (desc != NULL) { | |
1294 | netvsc_process_raw_pkt(device, | |
1295 | channel, | |
1296 | net_device, | |
1297 | ndev, | |
1298 | desc->trans_id, | |
1299 | desc); | |
1300 | ||
1301 | put_pkt_raw(channel, desc); | |
1302 | need_to_commit = true; | |
1303 | continue; | |
1304 | } | |
1305 | if (need_to_commit) { | |
1306 | need_to_commit = false; | |
1307 | commit_rd_index(channel); | |
1308 | } | |
1309 | ||
5b54dac8 | 1310 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1311 | &bytes_recvd, &request_id); |
21a80820 | 1312 | if (ret == 0) { |
85799a37 | 1313 | if (bytes_recvd > 0) { |
21a80820 | 1314 | desc = (struct vmpacket_descriptor *)buffer; |
99a50bb1 S |
1315 | netvsc_process_raw_pkt(device, |
1316 | channel, | |
1317 | net_device, | |
1318 | ndev, | |
1319 | request_id, | |
1320 | desc); | |
21a80820 | 1321 | } else { |
ee0c4c39 KS |
1322 | /* |
1323 | * We are done for this pass. | |
1324 | */ | |
fceaf24a HJ |
1325 | break; |
1326 | } | |
ee0c4c39 | 1327 | |
3d5cad97 | 1328 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1329 | if (bufferlen > NETVSC_PACKET_SIZE) |
1330 | kfree(buffer); | |
21a80820 | 1331 | /* Handle large packet */ |
85799a37 | 1332 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1333 | if (buffer == NULL) { |
454f18a9 | 1334 | /* Try again next time around */ |
d9871158 | 1335 | netdev_err(ndev, |
21a80820 | 1336 | "unable to allocate buffer of size " |
c909ebbd | 1337 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1338 | break; |
1339 | } | |
1340 | ||
85799a37 | 1341 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1342 | } |
1343 | } while (1); | |
1344 | ||
ee0c4c39 KS |
1345 | if (bufferlen > NETVSC_PACKET_SIZE) |
1346 | kfree(buffer); | |
c0b558e5 HZ |
1347 | |
1348 | netvsc_chk_recv_comp(net_device, channel, q_idx); | |
fceaf24a | 1349 | } |
af24ce42 | 1350 | |
b637e023 HZ |
1351 | /* |
1352 | * netvsc_device_add - Callback when the device belonging to this | |
1353 | * driver is added | |
1354 | */ | |
7bd23a4d | 1355 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 | 1356 | { |
88098834 | 1357 | int i, ret = 0; |
aae23986 S |
1358 | int ring_size = |
1359 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1360 | struct netvsc_device *net_device; |
88098834 VK |
1361 | struct net_device *ndev = hv_get_drvdata(device); |
1362 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1363 | |
88098834 | 1364 | net_device = alloc_net_device(); |
b1c84927 DC |
1365 | if (!net_device) |
1366 | return -ENOMEM; | |
b637e023 | 1367 | |
5b54dac8 HZ |
1368 | net_device->ring_size = ring_size; |
1369 | ||
5b54dac8 HZ |
1370 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1371 | ||
b637e023 | 1372 | /* Open the channel */ |
aae23986 S |
1373 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1374 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1375 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1376 | |
1377 | if (ret != 0) { | |
d9871158 | 1378 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1379 | goto cleanup; |
1380 | } | |
1381 | ||
1382 | /* Channel is opened */ | |
c909ebbd | 1383 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1384 | |
88098834 VK |
1385 | /* If we're reopening the device we may have multiple queues, fill the |
1386 | * chn_table with the default channel to use it before subchannels are | |
1387 | * opened. | |
1388 | */ | |
1389 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
1390 | net_device->chn_table[i] = device->channel; | |
1391 | ||
1392 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is | |
1393 | * populated. | |
1394 | */ | |
1395 | wmb(); | |
1396 | ||
1397 | net_device_ctx->nvdev = net_device; | |
5b54dac8 | 1398 | |
b637e023 HZ |
1399 | /* Connect with the NetVsp */ |
1400 | ret = netvsc_connect_vsp(device); | |
1401 | if (ret != 0) { | |
d9871158 | 1402 | netdev_err(ndev, |
c909ebbd | 1403 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1404 | goto close; |
1405 | } | |
1406 | ||
1407 | return ret; | |
1408 | ||
1409 | close: | |
1410 | /* Now, we can close the channel safely */ | |
1411 | vmbus_close(device->channel); | |
1412 | ||
1413 | cleanup: | |
f90251c8 | 1414 | free_netvsc_device(net_device); |
b637e023 HZ |
1415 | |
1416 | return ret; | |
1417 | } |