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> |
c25aaf81 | 31 | #include <asm/sync_bitops.h> |
3f335ea2 | 32 | |
5ca7252a | 33 | #include "hyperv_net.h" |
fceaf24a HJ |
34 | |
35 | ||
5a71ae30 | 36 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 37 | { |
85799a37 | 38 | struct netvsc_device *net_device; |
2ddd5e5f | 39 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 40 | |
85799a37 HZ |
41 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
42 | if (!net_device) | |
fceaf24a HJ |
43 | return NULL; |
44 | ||
f90251c8 HZ |
45 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
46 | if (!net_device->cb_buffer) { | |
47 | kfree(net_device); | |
48 | return NULL; | |
49 | } | |
50 | ||
dc5cd894 | 51 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 52 | net_device->start_remove = false; |
c38b9c71 | 53 | net_device->destroy = false; |
53d21fdb | 54 | net_device->dev = device; |
2ddd5e5f | 55 | net_device->ndev = ndev; |
fceaf24a | 56 | |
2ddd5e5f | 57 | hv_set_drvdata(device, net_device); |
85799a37 | 58 | return net_device; |
fceaf24a HJ |
59 | } |
60 | ||
f90251c8 HZ |
61 | static void free_netvsc_device(struct netvsc_device *nvdev) |
62 | { | |
63 | kfree(nvdev->cb_buffer); | |
64 | kfree(nvdev); | |
65 | } | |
66 | ||
5a71ae30 | 67 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 68 | { |
85799a37 | 69 | struct netvsc_device *net_device; |
fceaf24a | 70 | |
2ddd5e5f | 71 | net_device = hv_get_drvdata(device); |
9d88f33a | 72 | if (net_device && net_device->destroy) |
85799a37 | 73 | net_device = NULL; |
fceaf24a | 74 | |
85799a37 | 75 | return net_device; |
fceaf24a HJ |
76 | } |
77 | ||
5a71ae30 | 78 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 79 | { |
85799a37 | 80 | struct netvsc_device *net_device; |
fceaf24a | 81 | |
2ddd5e5f | 82 | net_device = hv_get_drvdata(device); |
9d88f33a S |
83 | |
84 | if (!net_device) | |
85 | goto get_in_err; | |
86 | ||
87 | if (net_device->destroy && | |
88 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 89 | net_device = NULL; |
fceaf24a | 90 | |
9d88f33a | 91 | get_in_err: |
85799a37 | 92 | return net_device; |
fceaf24a HJ |
93 | } |
94 | ||
fceaf24a | 95 | |
c25aaf81 | 96 | static int netvsc_destroy_buf(struct netvsc_device *net_device) |
ec91cd09 HZ |
97 | { |
98 | struct nvsp_message *revoke_packet; | |
99 | int ret = 0; | |
2ddd5e5f | 100 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
101 | |
102 | /* | |
103 | * If we got a section count, it means we received a | |
104 | * SendReceiveBufferComplete msg (ie sent | |
105 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
106 | * to send a revoke msg here | |
107 | */ | |
108 | if (net_device->recv_section_cnt) { | |
109 | /* Send the revoke receive buffer */ | |
110 | revoke_packet = &net_device->revoke_packet; | |
111 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
112 | ||
113 | revoke_packet->hdr.msg_type = | |
114 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
115 | revoke_packet->msg.v1_msg. | |
116 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
117 | ||
118 | ret = vmbus_sendpacket(net_device->dev->channel, | |
119 | revoke_packet, | |
120 | sizeof(struct nvsp_message), | |
121 | (unsigned long)revoke_packet, | |
122 | VM_PKT_DATA_INBAND, 0); | |
123 | /* | |
124 | * If we failed here, we might as well return and | |
125 | * have a leak rather than continue and a bugchk | |
126 | */ | |
127 | if (ret != 0) { | |
d9871158 | 128 | netdev_err(ndev, "unable to send " |
c909ebbd | 129 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 130 | return ret; |
ec91cd09 HZ |
131 | } |
132 | } | |
133 | ||
134 | /* Teardown the gpadl on the vsp end */ | |
135 | if (net_device->recv_buf_gpadl_handle) { | |
136 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
137 | net_device->recv_buf_gpadl_handle); | |
138 | ||
139 | /* If we failed here, we might as well return and have a leak | |
140 | * rather than continue and a bugchk | |
141 | */ | |
142 | if (ret != 0) { | |
d9871158 | 143 | netdev_err(ndev, |
c909ebbd | 144 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 145 | return ret; |
ec91cd09 HZ |
146 | } |
147 | net_device->recv_buf_gpadl_handle = 0; | |
148 | } | |
149 | ||
150 | if (net_device->recv_buf) { | |
151 | /* Free up the receive buffer */ | |
b679ef73 | 152 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
153 | net_device->recv_buf = NULL; |
154 | } | |
155 | ||
156 | if (net_device->recv_section) { | |
157 | net_device->recv_section_cnt = 0; | |
158 | kfree(net_device->recv_section); | |
159 | net_device->recv_section = NULL; | |
160 | } | |
161 | ||
c25aaf81 KS |
162 | /* Deal with the send buffer we may have setup. |
163 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
164 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
165 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
166 | * to send a revoke msg here |
167 | */ | |
168 | if (net_device->send_section_size) { | |
169 | /* Send the revoke receive buffer */ | |
170 | revoke_packet = &net_device->revoke_packet; | |
171 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
172 | ||
173 | revoke_packet->hdr.msg_type = | |
174 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
175 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
176 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 KS |
177 | |
178 | ret = vmbus_sendpacket(net_device->dev->channel, | |
179 | revoke_packet, | |
180 | sizeof(struct nvsp_message), | |
181 | (unsigned long)revoke_packet, | |
182 | VM_PKT_DATA_INBAND, 0); | |
183 | /* If we failed here, we might as well return and | |
184 | * have a leak rather than continue and a bugchk | |
185 | */ | |
186 | if (ret != 0) { | |
187 | netdev_err(ndev, "unable to send " | |
188 | "revoke send buffer to netvsp\n"); | |
189 | return ret; | |
190 | } | |
191 | } | |
192 | /* Teardown the gpadl on the vsp end */ | |
193 | if (net_device->send_buf_gpadl_handle) { | |
194 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
195 | net_device->send_buf_gpadl_handle); | |
196 | ||
197 | /* If we failed here, we might as well return and have a leak | |
198 | * rather than continue and a bugchk | |
199 | */ | |
200 | if (ret != 0) { | |
201 | netdev_err(ndev, | |
202 | "unable to teardown send buffer's gpadl\n"); | |
203 | return ret; | |
204 | } | |
2f18423d | 205 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
206 | } |
207 | if (net_device->send_buf) { | |
c51ed182 | 208 | /* Free up the send buffer */ |
06b47aac | 209 | vfree(net_device->send_buf); |
c25aaf81 KS |
210 | net_device->send_buf = NULL; |
211 | } | |
212 | kfree(net_device->send_section_map); | |
213 | ||
ec91cd09 HZ |
214 | return ret; |
215 | } | |
216 | ||
c25aaf81 | 217 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 218 | { |
21a80820 | 219 | int ret = 0; |
7390fe9c | 220 | unsigned long t; |
85799a37 HZ |
221 | struct netvsc_device *net_device; |
222 | struct nvsp_message *init_packet; | |
2ddd5e5f | 223 | struct net_device *ndev; |
fceaf24a | 224 | |
5a71ae30 | 225 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 226 | if (!net_device) |
927bc33c | 227 | return -ENODEV; |
2ddd5e5f | 228 | ndev = net_device->ndev; |
fceaf24a | 229 | |
b679ef73 | 230 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); |
53d21fdb | 231 | if (!net_device->recv_buf) { |
d9871158 | 232 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 233 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 234 | ret = -ENOMEM; |
0c3b7b2f | 235 | goto cleanup; |
fceaf24a | 236 | } |
fceaf24a | 237 | |
454f18a9 BP |
238 | /* |
239 | * Establish the gpadl handle for this buffer on this | |
240 | * channel. Note: This call uses the vmbus connection rather | |
241 | * than the channel to establish the gpadl handle. | |
242 | */ | |
53d21fdb HZ |
243 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
244 | net_device->recv_buf_size, | |
245 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 246 | if (ret != 0) { |
d9871158 | 247 | netdev_err(ndev, |
c909ebbd | 248 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 249 | goto cleanup; |
fceaf24a HJ |
250 | } |
251 | ||
fceaf24a | 252 | |
454f18a9 | 253 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 254 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 255 | |
85799a37 | 256 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 257 | |
53d21fdb HZ |
258 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
259 | init_packet->msg.v1_msg.send_recv_buf. | |
260 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
261 | init_packet->msg.v1_msg. | |
262 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 263 | |
454f18a9 | 264 | /* Send the gpadl notification request */ |
85799a37 | 265 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 266 | sizeof(struct nvsp_message), |
85799a37 | 267 | (unsigned long)init_packet, |
415f2287 | 268 | VM_PKT_DATA_INBAND, |
5a4df290 | 269 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 270 | if (ret != 0) { |
d9871158 | 271 | netdev_err(ndev, |
c909ebbd | 272 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 273 | goto cleanup; |
fceaf24a HJ |
274 | } |
275 | ||
5c5781b3 | 276 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 277 | BUG_ON(t == 0); |
0c3b7b2f | 278 | |
fceaf24a | 279 | |
454f18a9 | 280 | /* Check the response */ |
53d21fdb HZ |
281 | if (init_packet->msg.v1_msg. |
282 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 283 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 284 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
285 | init_packet->msg.v1_msg. |
286 | send_recv_buf_complete.status); | |
927bc33c | 287 | ret = -EINVAL; |
0c3b7b2f | 288 | goto cleanup; |
fceaf24a HJ |
289 | } |
290 | ||
454f18a9 | 291 | /* Parse the response */ |
fceaf24a | 292 | |
53d21fdb HZ |
293 | net_device->recv_section_cnt = init_packet->msg. |
294 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 295 | |
c1813200 HZ |
296 | net_device->recv_section = kmemdup( |
297 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
298 | net_device->recv_section_cnt * | |
299 | sizeof(struct nvsp_1_receive_buffer_section), | |
300 | GFP_KERNEL); | |
53d21fdb | 301 | if (net_device->recv_section == NULL) { |
927bc33c | 302 | ret = -EINVAL; |
0c3b7b2f | 303 | goto cleanup; |
fceaf24a HJ |
304 | } |
305 | ||
21a80820 GKH |
306 | /* |
307 | * For 1st release, there should only be 1 section that represents the | |
308 | * entire receive buffer | |
309 | */ | |
53d21fdb HZ |
310 | if (net_device->recv_section_cnt != 1 || |
311 | net_device->recv_section->offset != 0) { | |
927bc33c | 312 | ret = -EINVAL; |
0c3b7b2f | 313 | goto cleanup; |
fceaf24a HJ |
314 | } |
315 | ||
c25aaf81 KS |
316 | /* Now setup the send buffer. |
317 | */ | |
06b47aac | 318 | net_device->send_buf = vzalloc(net_device->send_buf_size); |
c25aaf81 KS |
319 | if (!net_device->send_buf) { |
320 | netdev_err(ndev, "unable to allocate send " | |
321 | "buffer of size %d\n", net_device->send_buf_size); | |
322 | ret = -ENOMEM; | |
323 | goto cleanup; | |
324 | } | |
325 | ||
326 | /* Establish the gpadl handle for this buffer on this | |
327 | * channel. Note: This call uses the vmbus connection rather | |
328 | * than the channel to establish the gpadl handle. | |
329 | */ | |
330 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
331 | net_device->send_buf_size, | |
332 | &net_device->send_buf_gpadl_handle); | |
333 | if (ret != 0) { | |
334 | netdev_err(ndev, | |
335 | "unable to establish send buffer's gpadl\n"); | |
336 | goto cleanup; | |
337 | } | |
338 | ||
339 | /* Notify the NetVsp of the gpadl handle */ | |
340 | init_packet = &net_device->channel_init_pkt; | |
341 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
342 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 343 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 344 | net_device->send_buf_gpadl_handle; |
c51ed182 | 345 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
346 | |
347 | /* Send the gpadl notification request */ | |
348 | ret = vmbus_sendpacket(device->channel, init_packet, | |
349 | sizeof(struct nvsp_message), | |
350 | (unsigned long)init_packet, | |
351 | VM_PKT_DATA_INBAND, | |
352 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
353 | if (ret != 0) { | |
354 | netdev_err(ndev, | |
355 | "unable to send send buffer's gpadl to netvsp\n"); | |
356 | goto cleanup; | |
357 | } | |
358 | ||
359 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
360 | BUG_ON(t == 0); | |
361 | ||
362 | /* Check the response */ | |
363 | if (init_packet->msg.v1_msg. | |
364 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
365 | netdev_err(ndev, "Unable to complete send buffer " | |
366 | "initialization with NetVsp - status %d\n", | |
367 | init_packet->msg.v1_msg. | |
c51ed182 | 368 | send_send_buf_complete.status); |
c25aaf81 KS |
369 | ret = -EINVAL; |
370 | goto cleanup; | |
371 | } | |
372 | ||
373 | /* Parse the response */ | |
374 | net_device->send_section_size = init_packet->msg. | |
375 | v1_msg.send_send_buf_complete.section_size; | |
376 | ||
377 | /* Section count is simply the size divided by the section size. | |
378 | */ | |
379 | net_device->send_section_cnt = | |
380 | net_device->send_buf_size/net_device->send_section_size; | |
381 | ||
382 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
383 | net_device->send_section_size, net_device->send_section_cnt); | |
384 | ||
385 | /* Setup state for managing the send buffer. */ | |
386 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
387 | BITS_PER_LONG); | |
388 | ||
389 | net_device->send_section_map = | |
390 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
391 | if (net_device->send_section_map == NULL) { |
392 | ret = -ENOMEM; | |
c25aaf81 | 393 | goto cleanup; |
dd1d3f8f | 394 | } |
c25aaf81 | 395 | |
0c3b7b2f | 396 | goto exit; |
fceaf24a | 397 | |
0c3b7b2f | 398 | cleanup: |
c25aaf81 | 399 | netvsc_destroy_buf(net_device); |
fceaf24a | 400 | |
0c3b7b2f | 401 | exit: |
fceaf24a HJ |
402 | return ret; |
403 | } | |
404 | ||
fceaf24a | 405 | |
f157e78d HZ |
406 | /* Negotiate NVSP protocol version */ |
407 | static int negotiate_nvsp_ver(struct hv_device *device, | |
408 | struct netvsc_device *net_device, | |
409 | struct nvsp_message *init_packet, | |
410 | u32 nvsp_ver) | |
fceaf24a | 411 | { |
7390fe9c NMG |
412 | int ret; |
413 | unsigned long t; | |
fceaf24a | 414 | |
85799a37 | 415 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 416 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
417 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
418 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 419 | |
454f18a9 | 420 | /* Send the init request */ |
85799a37 | 421 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 422 | sizeof(struct nvsp_message), |
85799a37 | 423 | (unsigned long)init_packet, |
415f2287 | 424 | VM_PKT_DATA_INBAND, |
5a4df290 | 425 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 426 | |
b8a3d52b | 427 | if (ret != 0) |
f157e78d | 428 | return ret; |
fceaf24a | 429 | |
5c5781b3 | 430 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 431 | |
f157e78d HZ |
432 | if (t == 0) |
433 | return -ETIMEDOUT; | |
fceaf24a | 434 | |
53d21fdb | 435 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
436 | NVSP_STAT_SUCCESS) |
437 | return -EINVAL; | |
fceaf24a | 438 | |
a1eabb01 | 439 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
440 | return 0; |
441 | ||
442 | /* NVSPv2 only: Send NDIS config */ | |
443 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
444 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d3c9d37 HZ |
445 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu + |
446 | ETH_HLEN; | |
1f5f3a75 | 447 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d HZ |
448 | |
449 | ret = vmbus_sendpacket(device->channel, init_packet, | |
450 | sizeof(struct nvsp_message), | |
451 | (unsigned long)init_packet, | |
452 | VM_PKT_DATA_INBAND, 0); | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | static int netvsc_connect_vsp(struct hv_device *device) | |
458 | { | |
459 | int ret; | |
460 | struct netvsc_device *net_device; | |
461 | struct nvsp_message *init_packet; | |
462 | int ndis_version; | |
463 | struct net_device *ndev; | |
a1eabb01 HZ |
464 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
465 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
466 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
467 | |
468 | net_device = get_outbound_net_device(device); | |
469 | if (!net_device) | |
470 | return -ENODEV; | |
471 | ndev = net_device->ndev; | |
472 | ||
473 | init_packet = &net_device->channel_init_pkt; | |
474 | ||
475 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
476 | for (i = num_ver - 1; i >= 0; i--) |
477 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
478 | ver_list[i]) == 0) { | |
479 | net_device->nvsp_version = ver_list[i]; | |
480 | break; | |
481 | } | |
482 | ||
483 | if (i < 0) { | |
0f48c72c | 484 | ret = -EPROTO; |
0c3b7b2f | 485 | goto cleanup; |
fceaf24a | 486 | } |
f157e78d HZ |
487 | |
488 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
489 | ||
454f18a9 | 490 | /* Send the ndis version */ |
85799a37 | 491 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 492 | |
a1eabb01 | 493 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 494 | ndis_version = 0x00060001; |
a1eabb01 HZ |
495 | else |
496 | ndis_version = 0x0006001e; | |
fceaf24a | 497 | |
53d21fdb HZ |
498 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
499 | init_packet->msg.v1_msg. | |
500 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 501 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
502 | init_packet->msg.v1_msg. |
503 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 504 | ndis_version & 0xFFFF; |
fceaf24a | 505 | |
454f18a9 | 506 | /* Send the init request */ |
85799a37 | 507 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
508 | sizeof(struct nvsp_message), |
509 | (unsigned long)init_packet, | |
510 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 511 | if (ret != 0) |
0c3b7b2f | 512 | goto cleanup; |
454f18a9 BP |
513 | |
514 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
515 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
516 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
517 | else | |
518 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 519 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 520 | |
c25aaf81 | 521 | ret = netvsc_init_buf(device); |
fceaf24a | 522 | |
0c3b7b2f | 523 | cleanup: |
fceaf24a HJ |
524 | return ret; |
525 | } | |
526 | ||
648dc598 | 527 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 528 | { |
c25aaf81 | 529 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
530 | } |
531 | ||
3e189519 | 532 | /* |
5a71ae30 | 533 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 534 | */ |
905620d1 | 535 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 536 | { |
85799a37 | 537 | struct netvsc_device *net_device; |
c38b9c71 | 538 | unsigned long flags; |
fceaf24a | 539 | |
2ddd5e5f | 540 | net_device = hv_get_drvdata(device); |
fceaf24a | 541 | |
648dc598 | 542 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 543 | |
3852409b | 544 | /* |
9d88f33a S |
545 | * Since we have already drained, we don't need to busy wait |
546 | * as was done in final_release_stor_device() | |
547 | * Note that we cannot set the ext pointer to NULL until | |
548 | * we have drained - to drain the outgoing packets, we need to | |
549 | * allow incoming packets. | |
3852409b | 550 | */ |
9d88f33a S |
551 | |
552 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 553 | hv_set_drvdata(device, NULL); |
9d88f33a | 554 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 555 | |
86c921af S |
556 | /* |
557 | * At this point, no one should be accessing net_device | |
558 | * except in here | |
559 | */ | |
c909ebbd | 560 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 561 | |
454f18a9 | 562 | /* Now, we can close the channel safely */ |
85799a37 | 563 | vmbus_close(device->channel); |
fceaf24a | 564 | |
454f18a9 | 565 | /* Release all resources */ |
aa99c479 | 566 | vfree(net_device->sub_cb_buf); |
f90251c8 | 567 | free_netvsc_device(net_device); |
21a80820 | 568 | return 0; |
fceaf24a HJ |
569 | } |
570 | ||
33be96e4 HZ |
571 | |
572 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
573 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
574 | ||
575 | /* | |
576 | * Get the percentage of available bytes to write in the ring. | |
577 | * The return value is in range from 0 to 100. | |
578 | */ | |
579 | static inline u32 hv_ringbuf_avail_percent( | |
580 | struct hv_ring_buffer_info *ring_info) | |
581 | { | |
582 | u32 avail_read, avail_write; | |
583 | ||
584 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
585 | ||
586 | return avail_write * 100 / ring_info->ring_datasize; | |
587 | } | |
588 | ||
c25aaf81 KS |
589 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
590 | u32 index) | |
591 | { | |
592 | sync_change_bit(index, net_device->send_section_map); | |
593 | } | |
594 | ||
97c1723a KS |
595 | static void netvsc_send_completion(struct netvsc_device *net_device, |
596 | struct hv_device *device, | |
85799a37 | 597 | struct vmpacket_descriptor *packet) |
fceaf24a | 598 | { |
85799a37 HZ |
599 | struct nvsp_message *nvsp_packet; |
600 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 601 | struct net_device *ndev; |
c25aaf81 | 602 | u32 send_index; |
fceaf24a | 603 | |
2ddd5e5f | 604 | ndev = net_device->ndev; |
fceaf24a | 605 | |
85799a37 | 606 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 607 | (packet->offset8 << 3)); |
fceaf24a | 608 | |
53d21fdb HZ |
609 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
610 | (nvsp_packet->hdr.msg_type == | |
611 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
612 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
613 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
614 | (nvsp_packet->hdr.msg_type == | |
615 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 616 | /* Copy the response back */ |
53d21fdb | 617 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 618 | sizeof(struct nvsp_message)); |
35abb21a | 619 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
620 | } else if (nvsp_packet->hdr.msg_type == |
621 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 622 | int num_outstanding_sends; |
5b54dac8 HZ |
623 | u16 q_idx = 0; |
624 | struct vmbus_channel *channel = device->channel; | |
625 | int queue_sends; | |
33be96e4 | 626 | |
454f18a9 | 627 | /* Get the send context */ |
85799a37 | 628 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 629 | packet->trans_id; |
fceaf24a | 630 | |
454f18a9 | 631 | /* Notify the layer above us */ |
5b54dac8 | 632 | if (nvsc_packet) { |
c25aaf81 KS |
633 | send_index = nvsc_packet->send_buf_index; |
634 | if (send_index != NETVSC_INVALID_INDEX) | |
635 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 HZ |
636 | q_idx = nvsc_packet->q_idx; |
637 | channel = nvsc_packet->channel; | |
893f6627 HZ |
638 | nvsc_packet->send_completion(nvsc_packet-> |
639 | send_completion_ctx); | |
5b54dac8 | 640 | } |
fceaf24a | 641 | |
33be96e4 HZ |
642 | num_outstanding_sends = |
643 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
644 | queue_sends = atomic_dec_return(&net_device-> |
645 | queue_sends[q_idx]); | |
1d06825b | 646 | |
dc5cd894 HZ |
647 | if (net_device->destroy && num_outstanding_sends == 0) |
648 | wake_up(&net_device->wait_drain); | |
649 | ||
5b54dac8 HZ |
650 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
651 | !net_device->start_remove && | |
652 | (hv_ringbuf_avail_percent(&channel->outbound) > | |
653 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
654 | netif_tx_wake_queue(netdev_get_tx_queue( | |
655 | ndev, q_idx)); | |
21a80820 | 656 | } else { |
d9871158 | 657 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 658 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
659 | } |
660 | ||
fceaf24a HJ |
661 | } |
662 | ||
c25aaf81 KS |
663 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
664 | { | |
665 | unsigned long index; | |
666 | u32 max_words = net_device->map_words; | |
667 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
668 | u32 section_cnt = net_device->send_section_cnt; | |
669 | int ret_val = NETVSC_INVALID_INDEX; | |
670 | int i; | |
671 | int prev_val; | |
672 | ||
673 | for (i = 0; i < max_words; i++) { | |
674 | if (!~(map_addr[i])) | |
675 | continue; | |
676 | index = ffz(map_addr[i]); | |
677 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
678 | if (prev_val) | |
679 | continue; | |
680 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
681 | break; | |
682 | ret_val = (index + (i * BITS_PER_LONG)); | |
683 | break; | |
684 | } | |
685 | return ret_val; | |
686 | } | |
687 | ||
688 | u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, | |
689 | unsigned int section_index, | |
690 | struct hv_netvsc_packet *packet) | |
691 | { | |
692 | char *start = net_device->send_buf; | |
693 | char *dest = (start + (section_index * net_device->send_section_size)); | |
694 | int i; | |
695 | u32 msg_size = 0; | |
696 | ||
697 | for (i = 0; i < packet->page_buf_cnt; i++) { | |
698 | char *src = phys_to_virt(packet->page_buf[i].pfn << PAGE_SHIFT); | |
699 | u32 offset = packet->page_buf[i].offset; | |
700 | u32 len = packet->page_buf[i].len; | |
701 | ||
702 | memcpy(dest, (src + offset), len); | |
703 | msg_size += len; | |
704 | dest += len; | |
705 | } | |
706 | return msg_size; | |
707 | } | |
708 | ||
f9819f05 | 709 | int netvsc_send(struct hv_device *device, |
85799a37 | 710 | struct hv_netvsc_packet *packet) |
fceaf24a | 711 | { |
85799a37 | 712 | struct netvsc_device *net_device; |
21a80820 | 713 | int ret = 0; |
223c1aa6 | 714 | struct nvsp_message sendMessage; |
2ddd5e5f | 715 | struct net_device *ndev; |
5b54dac8 | 716 | struct vmbus_channel *out_channel = NULL; |
f1ea3cd7 | 717 | u64 req_id; |
c25aaf81 KS |
718 | unsigned int section_index = NETVSC_INVALID_INDEX; |
719 | u32 msg_size = 0; | |
720 | struct sk_buff *skb; | |
3a67c9cc | 721 | u16 q_idx = packet->q_idx; |
c25aaf81 | 722 | |
fceaf24a | 723 | |
5a71ae30 | 724 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 725 | if (!net_device) |
ff2bd69a | 726 | return -ENODEV; |
2ddd5e5f | 727 | ndev = net_device->ndev; |
fceaf24a | 728 | |
53d21fdb | 729 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 730 | if (packet->is_data_pkt) { |
21a80820 | 731 | /* 0 is RMC_DATA; */ |
53d21fdb | 732 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
733 | } else { |
734 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 735 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 736 | } |
fceaf24a | 737 | |
c25aaf81 KS |
738 | /* Attempt to send via sendbuf */ |
739 | if (packet->total_data_buflen < net_device->send_section_size) { | |
740 | section_index = netvsc_get_next_send_section(net_device); | |
741 | if (section_index != NETVSC_INVALID_INDEX) { | |
742 | msg_size = netvsc_copy_to_send_buf(net_device, | |
743 | section_index, | |
744 | packet); | |
745 | skb = (struct sk_buff *) | |
746 | (unsigned long)packet->send_completion_tid; | |
747 | if (skb) | |
748 | dev_kfree_skb_any(skb); | |
749 | packet->page_buf_cnt = 0; | |
750 | } | |
751 | } | |
752 | packet->send_buf_index = section_index; | |
753 | ||
754 | ||
53d21fdb | 755 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
c25aaf81 KS |
756 | section_index; |
757 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = msg_size; | |
21a80820 | 758 | |
893f6627 | 759 | if (packet->send_completion) |
00ca8f0c | 760 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
761 | else |
762 | req_id = 0; | |
763 | ||
5b54dac8 HZ |
764 | out_channel = net_device->chn_table[packet->q_idx]; |
765 | if (out_channel == NULL) | |
766 | out_channel = device->channel; | |
767 | packet->channel = out_channel; | |
768 | ||
c3582a2c HZ |
769 | if (out_channel->rescind) |
770 | return -ENODEV; | |
771 | ||
72a2f5bd | 772 | if (packet->page_buf_cnt) { |
5b54dac8 | 773 | ret = vmbus_sendpacket_pagebuffer(out_channel, |
72a2f5bd HZ |
774 | packet->page_buf, |
775 | packet->page_buf_cnt, | |
ff3f8eec GKH |
776 | &sendMessage, |
777 | sizeof(struct nvsp_message), | |
f1ea3cd7 | 778 | req_id); |
21a80820 | 779 | } else { |
5b54dac8 | 780 | ret = vmbus_sendpacket(out_channel, &sendMessage, |
e4d59ac5 | 781 | sizeof(struct nvsp_message), |
f1ea3cd7 | 782 | req_id, |
e4d59ac5 HZ |
783 | VM_PKT_DATA_INBAND, |
784 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
785 | } |
786 | ||
1d06825b HZ |
787 | if (ret == 0) { |
788 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 789 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 HZ |
790 | |
791 | if (hv_ringbuf_avail_percent(&out_channel->outbound) < | |
33be96e4 | 792 | RING_AVAIL_PERCENT_LOWATER) { |
5b54dac8 | 793 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc | 794 | ndev, q_idx)); |
5b54dac8 | 795 | |
33be96e4 | 796 | if (atomic_read(&net_device-> |
3a67c9cc | 797 | queue_sends[q_idx]) < 1) |
5b54dac8 | 798 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 799 | ndev, q_idx)); |
33be96e4 | 800 | } |
1d06825b | 801 | } else if (ret == -EAGAIN) { |
5b54dac8 | 802 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
803 | ndev, q_idx)); |
804 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 805 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 806 | ndev, q_idx)); |
33be96e4 HZ |
807 | ret = -ENOSPC; |
808 | } | |
1d06825b | 809 | } else { |
d9871158 | 810 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 811 | packet, ret); |
1d06825b | 812 | } |
fceaf24a | 813 | |
fceaf24a HJ |
814 | return ret; |
815 | } | |
816 | ||
5fa9d3c5 | 817 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 818 | struct vmbus_channel *channel, |
97c1723a | 819 | struct netvsc_device *net_device, |
63f6921d | 820 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
821 | { |
822 | struct nvsp_message recvcompMessage; | |
823 | int retries = 0; | |
824 | int ret; | |
2ddd5e5f | 825 | struct net_device *ndev; |
2ddd5e5f S |
826 | |
827 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
828 | |
829 | recvcompMessage.hdr.msg_type = | |
830 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
831 | ||
63f6921d | 832 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
833 | |
834 | retry_send_cmplt: | |
835 | /* Send the completion */ | |
5b54dac8 | 836 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
837 | sizeof(struct nvsp_message), transaction_id, |
838 | VM_PKT_COMP, 0); | |
839 | if (ret == 0) { | |
840 | /* success */ | |
841 | /* no-op */ | |
d2598f01 | 842 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
843 | /* no more room...wait a bit and attempt to retry 3 times */ |
844 | retries++; | |
d9871158 | 845 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 846 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
847 | |
848 | if (retries < 4) { | |
849 | udelay(100); | |
850 | goto retry_send_cmplt; | |
851 | } else { | |
d9871158 | 852 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 853 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
854 | transaction_id); |
855 | } | |
856 | } else { | |
d9871158 | 857 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 858 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
859 | } |
860 | } | |
861 | ||
97c1723a | 862 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 863 | struct vmbus_channel *channel, |
97c1723a KS |
864 | struct hv_device *device, |
865 | struct vmpacket_descriptor *packet) | |
fceaf24a | 866 | { |
85799a37 HZ |
867 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
868 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
869 | struct hv_netvsc_packet nv_pkt; |
870 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
871 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
872 | int i; |
873 | int count = 0; | |
2ddd5e5f | 874 | struct net_device *ndev; |
779b4d17 | 875 | |
2ddd5e5f | 876 | ndev = net_device->ndev; |
fceaf24a | 877 | |
21a80820 GKH |
878 | /* |
879 | * All inbound packets other than send completion should be xfer page | |
880 | * packet | |
881 | */ | |
415f2287 | 882 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 883 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 884 | packet->type); |
fceaf24a HJ |
885 | return; |
886 | } | |
887 | ||
85799a37 | 888 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 889 | (packet->offset8 << 3)); |
fceaf24a | 890 | |
454f18a9 | 891 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
892 | if (nvsp_packet->hdr.msg_type != |
893 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 894 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 895 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
896 | return; |
897 | } | |
898 | ||
85799a37 | 899 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 900 | |
415f2287 | 901 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 902 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 903 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 904 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
905 | return; |
906 | } | |
907 | ||
4baab261 HZ |
908 | count = vmxferpage_packet->range_cnt; |
909 | netvsc_packet->device = device; | |
910 | netvsc_packet->channel = channel; | |
fceaf24a | 911 | |
454f18a9 | 912 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 913 | for (i = 0; i < count; i++) { |
454f18a9 | 914 | /* Initialize the netvsc packet */ |
63f6921d | 915 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
45326342 HZ |
916 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
917 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 918 | netvsc_packet->total_data_buflen = |
415f2287 | 919 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 920 | |
454f18a9 | 921 | /* Pass it to the upper layer */ |
ac6f7859 | 922 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 923 | |
4baab261 HZ |
924 | if (netvsc_packet->status != NVSP_STAT_SUCCESS) |
925 | status = NVSP_STAT_FAIL; | |
fceaf24a HJ |
926 | } |
927 | ||
4baab261 HZ |
928 | netvsc_send_recv_completion(device, channel, net_device, |
929 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
930 | } |
931 | ||
5b54dac8 HZ |
932 | |
933 | static void netvsc_send_table(struct hv_device *hdev, | |
934 | struct vmpacket_descriptor *vmpkt) | |
935 | { | |
936 | struct netvsc_device *nvscdev; | |
937 | struct net_device *ndev; | |
938 | struct nvsp_message *nvmsg; | |
939 | int i; | |
940 | u32 count, *tab; | |
941 | ||
942 | nvscdev = get_outbound_net_device(hdev); | |
943 | if (!nvscdev) | |
944 | return; | |
945 | ndev = nvscdev->ndev; | |
946 | ||
947 | nvmsg = (struct nvsp_message *)((unsigned long)vmpkt + | |
948 | (vmpkt->offset8 << 3)); | |
949 | ||
950 | if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE) | |
951 | return; | |
952 | ||
953 | count = nvmsg->msg.v5_msg.send_table.count; | |
954 | if (count != VRSS_SEND_TAB_SIZE) { | |
955 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
956 | return; | |
957 | } | |
958 | ||
959 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
960 | nvmsg->msg.v5_msg.send_table.offset); | |
961 | ||
962 | for (i = 0; i < count; i++) | |
963 | nvscdev->send_table[i] = tab[i]; | |
964 | } | |
965 | ||
966 | void netvsc_channel_cb(void *context) | |
fceaf24a | 967 | { |
21a80820 | 968 | int ret; |
5b54dac8 HZ |
969 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
970 | struct hv_device *device; | |
85799a37 HZ |
971 | struct netvsc_device *net_device; |
972 | u32 bytes_recvd; | |
973 | u64 request_id; | |
8dc0a06a | 974 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
975 | unsigned char *buffer; |
976 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 977 | struct net_device *ndev; |
fceaf24a | 978 | |
5b54dac8 HZ |
979 | if (channel->primary_channel != NULL) |
980 | device = channel->primary_channel->device_obj; | |
981 | else | |
982 | device = channel->device_obj; | |
983 | ||
5a71ae30 | 984 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 985 | if (!net_device) |
ee0c4c39 | 986 | return; |
2ddd5e5f | 987 | ndev = net_device->ndev; |
5b54dac8 | 988 | buffer = get_per_channel_state(channel); |
fceaf24a | 989 | |
21a80820 | 990 | do { |
5b54dac8 | 991 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 992 | &bytes_recvd, &request_id); |
21a80820 | 993 | if (ret == 0) { |
85799a37 | 994 | if (bytes_recvd > 0) { |
21a80820 | 995 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
996 | switch (desc->type) { |
997 | case VM_PKT_COMP: | |
97c1723a KS |
998 | netvsc_send_completion(net_device, |
999 | device, desc); | |
21a80820 GKH |
1000 | break; |
1001 | ||
415f2287 | 1002 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
1003 | netvsc_receive(net_device, channel, |
1004 | device, desc); | |
1005 | break; | |
1006 | ||
1007 | case VM_PKT_DATA_INBAND: | |
1008 | netvsc_send_table(device, desc); | |
21a80820 GKH |
1009 | break; |
1010 | ||
1011 | default: | |
d9871158 | 1012 | netdev_err(ndev, |
21a80820 GKH |
1013 | "unhandled packet type %d, " |
1014 | "tid %llx len %d\n", | |
415f2287 | 1015 | desc->type, request_id, |
85799a37 | 1016 | bytes_recvd); |
21a80820 | 1017 | break; |
fceaf24a HJ |
1018 | } |
1019 | ||
21a80820 | 1020 | } else { |
ee0c4c39 KS |
1021 | /* |
1022 | * We are done for this pass. | |
1023 | */ | |
fceaf24a HJ |
1024 | break; |
1025 | } | |
ee0c4c39 | 1026 | |
3d5cad97 | 1027 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1028 | if (bufferlen > NETVSC_PACKET_SIZE) |
1029 | kfree(buffer); | |
21a80820 | 1030 | /* Handle large packet */ |
85799a37 | 1031 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1032 | if (buffer == NULL) { |
454f18a9 | 1033 | /* Try again next time around */ |
d9871158 | 1034 | netdev_err(ndev, |
21a80820 | 1035 | "unable to allocate buffer of size " |
c909ebbd | 1036 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1037 | break; |
1038 | } | |
1039 | ||
85799a37 | 1040 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1041 | } |
1042 | } while (1); | |
1043 | ||
ee0c4c39 KS |
1044 | if (bufferlen > NETVSC_PACKET_SIZE) |
1045 | kfree(buffer); | |
fceaf24a HJ |
1046 | return; |
1047 | } | |
af24ce42 | 1048 | |
b637e023 HZ |
1049 | /* |
1050 | * netvsc_device_add - Callback when the device belonging to this | |
1051 | * driver is added | |
1052 | */ | |
7bd23a4d | 1053 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1054 | { |
1055 | int ret = 0; | |
aae23986 S |
1056 | int ring_size = |
1057 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1058 | struct netvsc_device *net_device; |
2ddd5e5f | 1059 | struct net_device *ndev; |
b637e023 HZ |
1060 | |
1061 | net_device = alloc_net_device(device); | |
b1c84927 DC |
1062 | if (!net_device) |
1063 | return -ENOMEM; | |
b637e023 | 1064 | |
5b54dac8 HZ |
1065 | net_device->ring_size = ring_size; |
1066 | ||
2ddd5e5f S |
1067 | /* |
1068 | * Coming into this function, struct net_device * is | |
1069 | * registered as the driver private data. | |
1070 | * In alloc_net_device(), we register struct netvsc_device * | |
1071 | * as the driver private data and stash away struct net_device * | |
1072 | * in struct netvsc_device *. | |
1073 | */ | |
1074 | ndev = net_device->ndev; | |
1075 | ||
b637e023 | 1076 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1077 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1078 | |
5b54dac8 HZ |
1079 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1080 | ||
b637e023 | 1081 | /* Open the channel */ |
aae23986 S |
1082 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1083 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1084 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1085 | |
1086 | if (ret != 0) { | |
d9871158 | 1087 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1088 | goto cleanup; |
1089 | } | |
1090 | ||
1091 | /* Channel is opened */ | |
c909ebbd | 1092 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1093 | |
5b54dac8 HZ |
1094 | net_device->chn_table[0] = device->channel; |
1095 | ||
b637e023 HZ |
1096 | /* Connect with the NetVsp */ |
1097 | ret = netvsc_connect_vsp(device); | |
1098 | if (ret != 0) { | |
d9871158 | 1099 | netdev_err(ndev, |
c909ebbd | 1100 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1101 | goto close; |
1102 | } | |
1103 | ||
1104 | return ret; | |
1105 | ||
1106 | close: | |
1107 | /* Now, we can close the channel safely */ | |
1108 | vmbus_close(device->channel); | |
1109 | ||
1110 | cleanup: | |
f90251c8 | 1111 | free_netvsc_device(net_device); |
b637e023 HZ |
1112 | |
1113 | return ret; | |
1114 | } |