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); |
7c3877f2 | 40 | int i; |
fceaf24a | 41 | |
85799a37 HZ |
42 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
43 | if (!net_device) | |
fceaf24a HJ |
44 | return NULL; |
45 | ||
f90251c8 HZ |
46 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
47 | if (!net_device->cb_buffer) { | |
48 | kfree(net_device); | |
49 | return NULL; | |
50 | } | |
51 | ||
dc5cd894 | 52 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 53 | net_device->start_remove = false; |
c38b9c71 | 54 | net_device->destroy = false; |
53d21fdb | 55 | net_device->dev = device; |
2ddd5e5f | 56 | net_device->ndev = ndev; |
7c3877f2 HZ |
57 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
58 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
59 | ||
60 | for (i = 0; i < num_online_cpus(); i++) | |
61 | spin_lock_init(&net_device->msd[i].lock); | |
fceaf24a | 62 | |
2ddd5e5f | 63 | hv_set_drvdata(device, net_device); |
85799a37 | 64 | return net_device; |
fceaf24a HJ |
65 | } |
66 | ||
f90251c8 HZ |
67 | static void free_netvsc_device(struct netvsc_device *nvdev) |
68 | { | |
69 | kfree(nvdev->cb_buffer); | |
70 | kfree(nvdev); | |
71 | } | |
72 | ||
5a71ae30 | 73 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 74 | { |
85799a37 | 75 | struct netvsc_device *net_device; |
fceaf24a | 76 | |
2ddd5e5f | 77 | net_device = hv_get_drvdata(device); |
9d88f33a | 78 | if (net_device && net_device->destroy) |
85799a37 | 79 | net_device = NULL; |
fceaf24a | 80 | |
85799a37 | 81 | return net_device; |
fceaf24a HJ |
82 | } |
83 | ||
5a71ae30 | 84 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 85 | { |
85799a37 | 86 | struct netvsc_device *net_device; |
fceaf24a | 87 | |
2ddd5e5f | 88 | net_device = hv_get_drvdata(device); |
9d88f33a S |
89 | |
90 | if (!net_device) | |
91 | goto get_in_err; | |
92 | ||
93 | if (net_device->destroy && | |
94 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 95 | net_device = NULL; |
fceaf24a | 96 | |
9d88f33a | 97 | get_in_err: |
85799a37 | 98 | return net_device; |
fceaf24a HJ |
99 | } |
100 | ||
fceaf24a | 101 | |
c25aaf81 | 102 | static int netvsc_destroy_buf(struct netvsc_device *net_device) |
ec91cd09 HZ |
103 | { |
104 | struct nvsp_message *revoke_packet; | |
105 | int ret = 0; | |
2ddd5e5f | 106 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
107 | |
108 | /* | |
109 | * If we got a section count, it means we received a | |
110 | * SendReceiveBufferComplete msg (ie sent | |
111 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
112 | * to send a revoke msg here | |
113 | */ | |
114 | if (net_device->recv_section_cnt) { | |
115 | /* Send the revoke receive buffer */ | |
116 | revoke_packet = &net_device->revoke_packet; | |
117 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
118 | ||
119 | revoke_packet->hdr.msg_type = | |
120 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
121 | revoke_packet->msg.v1_msg. | |
122 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
123 | ||
124 | ret = vmbus_sendpacket(net_device->dev->channel, | |
125 | revoke_packet, | |
126 | sizeof(struct nvsp_message), | |
127 | (unsigned long)revoke_packet, | |
128 | VM_PKT_DATA_INBAND, 0); | |
129 | /* | |
130 | * If we failed here, we might as well return and | |
131 | * have a leak rather than continue and a bugchk | |
132 | */ | |
133 | if (ret != 0) { | |
d9871158 | 134 | netdev_err(ndev, "unable to send " |
c909ebbd | 135 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 136 | return ret; |
ec91cd09 HZ |
137 | } |
138 | } | |
139 | ||
140 | /* Teardown the gpadl on the vsp end */ | |
141 | if (net_device->recv_buf_gpadl_handle) { | |
142 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
143 | net_device->recv_buf_gpadl_handle); | |
144 | ||
145 | /* If we failed here, we might as well return and have a leak | |
146 | * rather than continue and a bugchk | |
147 | */ | |
148 | if (ret != 0) { | |
d9871158 | 149 | netdev_err(ndev, |
c909ebbd | 150 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 151 | return ret; |
ec91cd09 HZ |
152 | } |
153 | net_device->recv_buf_gpadl_handle = 0; | |
154 | } | |
155 | ||
156 | if (net_device->recv_buf) { | |
157 | /* Free up the receive buffer */ | |
b679ef73 | 158 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
159 | net_device->recv_buf = NULL; |
160 | } | |
161 | ||
162 | if (net_device->recv_section) { | |
163 | net_device->recv_section_cnt = 0; | |
164 | kfree(net_device->recv_section); | |
165 | net_device->recv_section = NULL; | |
166 | } | |
167 | ||
c25aaf81 KS |
168 | /* Deal with the send buffer we may have setup. |
169 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
170 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
171 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
172 | * to send a revoke msg here |
173 | */ | |
174 | if (net_device->send_section_size) { | |
175 | /* Send the revoke receive buffer */ | |
176 | revoke_packet = &net_device->revoke_packet; | |
177 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
178 | ||
179 | revoke_packet->hdr.msg_type = | |
180 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
181 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
182 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 KS |
183 | |
184 | ret = vmbus_sendpacket(net_device->dev->channel, | |
185 | revoke_packet, | |
186 | sizeof(struct nvsp_message), | |
187 | (unsigned long)revoke_packet, | |
188 | VM_PKT_DATA_INBAND, 0); | |
189 | /* If we failed here, we might as well return and | |
190 | * have a leak rather than continue and a bugchk | |
191 | */ | |
192 | if (ret != 0) { | |
193 | netdev_err(ndev, "unable to send " | |
194 | "revoke send buffer to netvsp\n"); | |
195 | return ret; | |
196 | } | |
197 | } | |
198 | /* Teardown the gpadl on the vsp end */ | |
199 | if (net_device->send_buf_gpadl_handle) { | |
200 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
201 | net_device->send_buf_gpadl_handle); | |
202 | ||
203 | /* If we failed here, we might as well return and have a leak | |
204 | * rather than continue and a bugchk | |
205 | */ | |
206 | if (ret != 0) { | |
207 | netdev_err(ndev, | |
208 | "unable to teardown send buffer's gpadl\n"); | |
209 | return ret; | |
210 | } | |
2f18423d | 211 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
212 | } |
213 | if (net_device->send_buf) { | |
c51ed182 | 214 | /* Free up the send buffer */ |
06b47aac | 215 | vfree(net_device->send_buf); |
c25aaf81 KS |
216 | net_device->send_buf = NULL; |
217 | } | |
218 | kfree(net_device->send_section_map); | |
219 | ||
ec91cd09 HZ |
220 | return ret; |
221 | } | |
222 | ||
c25aaf81 | 223 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 224 | { |
21a80820 | 225 | int ret = 0; |
7390fe9c | 226 | unsigned long t; |
85799a37 HZ |
227 | struct netvsc_device *net_device; |
228 | struct nvsp_message *init_packet; | |
2ddd5e5f | 229 | struct net_device *ndev; |
fceaf24a | 230 | |
5a71ae30 | 231 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 232 | if (!net_device) |
927bc33c | 233 | return -ENODEV; |
2ddd5e5f | 234 | ndev = net_device->ndev; |
fceaf24a | 235 | |
b679ef73 | 236 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); |
53d21fdb | 237 | if (!net_device->recv_buf) { |
d9871158 | 238 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 239 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 240 | ret = -ENOMEM; |
0c3b7b2f | 241 | goto cleanup; |
fceaf24a | 242 | } |
fceaf24a | 243 | |
454f18a9 BP |
244 | /* |
245 | * Establish the gpadl handle for this buffer on this | |
246 | * channel. Note: This call uses the vmbus connection rather | |
247 | * than the channel to establish the gpadl handle. | |
248 | */ | |
53d21fdb HZ |
249 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
250 | net_device->recv_buf_size, | |
251 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 252 | if (ret != 0) { |
d9871158 | 253 | netdev_err(ndev, |
c909ebbd | 254 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 255 | goto cleanup; |
fceaf24a HJ |
256 | } |
257 | ||
fceaf24a | 258 | |
454f18a9 | 259 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 260 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 261 | |
85799a37 | 262 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 263 | |
53d21fdb HZ |
264 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
265 | init_packet->msg.v1_msg.send_recv_buf. | |
266 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
267 | init_packet->msg.v1_msg. | |
268 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 269 | |
454f18a9 | 270 | /* Send the gpadl notification request */ |
85799a37 | 271 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 272 | sizeof(struct nvsp_message), |
85799a37 | 273 | (unsigned long)init_packet, |
415f2287 | 274 | VM_PKT_DATA_INBAND, |
5a4df290 | 275 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 276 | if (ret != 0) { |
d9871158 | 277 | netdev_err(ndev, |
c909ebbd | 278 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 279 | goto cleanup; |
fceaf24a HJ |
280 | } |
281 | ||
5c5781b3 | 282 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 283 | BUG_ON(t == 0); |
0c3b7b2f | 284 | |
fceaf24a | 285 | |
454f18a9 | 286 | /* Check the response */ |
53d21fdb HZ |
287 | if (init_packet->msg.v1_msg. |
288 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 289 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 290 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
291 | init_packet->msg.v1_msg. |
292 | send_recv_buf_complete.status); | |
927bc33c | 293 | ret = -EINVAL; |
0c3b7b2f | 294 | goto cleanup; |
fceaf24a HJ |
295 | } |
296 | ||
454f18a9 | 297 | /* Parse the response */ |
fceaf24a | 298 | |
53d21fdb HZ |
299 | net_device->recv_section_cnt = init_packet->msg. |
300 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 301 | |
c1813200 HZ |
302 | net_device->recv_section = kmemdup( |
303 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
304 | net_device->recv_section_cnt * | |
305 | sizeof(struct nvsp_1_receive_buffer_section), | |
306 | GFP_KERNEL); | |
53d21fdb | 307 | if (net_device->recv_section == NULL) { |
927bc33c | 308 | ret = -EINVAL; |
0c3b7b2f | 309 | goto cleanup; |
fceaf24a HJ |
310 | } |
311 | ||
21a80820 GKH |
312 | /* |
313 | * For 1st release, there should only be 1 section that represents the | |
314 | * entire receive buffer | |
315 | */ | |
53d21fdb HZ |
316 | if (net_device->recv_section_cnt != 1 || |
317 | net_device->recv_section->offset != 0) { | |
927bc33c | 318 | ret = -EINVAL; |
0c3b7b2f | 319 | goto cleanup; |
fceaf24a HJ |
320 | } |
321 | ||
c25aaf81 KS |
322 | /* Now setup the send buffer. |
323 | */ | |
06b47aac | 324 | net_device->send_buf = vzalloc(net_device->send_buf_size); |
c25aaf81 KS |
325 | if (!net_device->send_buf) { |
326 | netdev_err(ndev, "unable to allocate send " | |
327 | "buffer of size %d\n", net_device->send_buf_size); | |
328 | ret = -ENOMEM; | |
329 | goto cleanup; | |
330 | } | |
331 | ||
332 | /* Establish the gpadl handle for this buffer on this | |
333 | * channel. Note: This call uses the vmbus connection rather | |
334 | * than the channel to establish the gpadl handle. | |
335 | */ | |
336 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
337 | net_device->send_buf_size, | |
338 | &net_device->send_buf_gpadl_handle); | |
339 | if (ret != 0) { | |
340 | netdev_err(ndev, | |
341 | "unable to establish send buffer's gpadl\n"); | |
342 | goto cleanup; | |
343 | } | |
344 | ||
345 | /* Notify the NetVsp of the gpadl handle */ | |
346 | init_packet = &net_device->channel_init_pkt; | |
347 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
348 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 349 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 350 | net_device->send_buf_gpadl_handle; |
c51ed182 | 351 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
352 | |
353 | /* Send the gpadl notification request */ | |
354 | ret = vmbus_sendpacket(device->channel, init_packet, | |
355 | sizeof(struct nvsp_message), | |
356 | (unsigned long)init_packet, | |
357 | VM_PKT_DATA_INBAND, | |
358 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
359 | if (ret != 0) { | |
360 | netdev_err(ndev, | |
361 | "unable to send send buffer's gpadl to netvsp\n"); | |
362 | goto cleanup; | |
363 | } | |
364 | ||
365 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
366 | BUG_ON(t == 0); | |
367 | ||
368 | /* Check the response */ | |
369 | if (init_packet->msg.v1_msg. | |
370 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
371 | netdev_err(ndev, "Unable to complete send buffer " | |
372 | "initialization with NetVsp - status %d\n", | |
373 | init_packet->msg.v1_msg. | |
c51ed182 | 374 | send_send_buf_complete.status); |
c25aaf81 KS |
375 | ret = -EINVAL; |
376 | goto cleanup; | |
377 | } | |
378 | ||
379 | /* Parse the response */ | |
380 | net_device->send_section_size = init_packet->msg. | |
381 | v1_msg.send_send_buf_complete.section_size; | |
382 | ||
383 | /* Section count is simply the size divided by the section size. | |
384 | */ | |
385 | net_device->send_section_cnt = | |
386 | net_device->send_buf_size/net_device->send_section_size; | |
387 | ||
388 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
389 | net_device->send_section_size, net_device->send_section_cnt); | |
390 | ||
391 | /* Setup state for managing the send buffer. */ | |
392 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
393 | BITS_PER_LONG); | |
394 | ||
395 | net_device->send_section_map = | |
396 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
397 | if (net_device->send_section_map == NULL) { |
398 | ret = -ENOMEM; | |
c25aaf81 | 399 | goto cleanup; |
dd1d3f8f | 400 | } |
c25aaf81 | 401 | |
0c3b7b2f | 402 | goto exit; |
fceaf24a | 403 | |
0c3b7b2f | 404 | cleanup: |
c25aaf81 | 405 | netvsc_destroy_buf(net_device); |
fceaf24a | 406 | |
0c3b7b2f | 407 | exit: |
fceaf24a HJ |
408 | return ret; |
409 | } | |
410 | ||
fceaf24a | 411 | |
f157e78d HZ |
412 | /* Negotiate NVSP protocol version */ |
413 | static int negotiate_nvsp_ver(struct hv_device *device, | |
414 | struct netvsc_device *net_device, | |
415 | struct nvsp_message *init_packet, | |
416 | u32 nvsp_ver) | |
fceaf24a | 417 | { |
7390fe9c NMG |
418 | int ret; |
419 | unsigned long t; | |
fceaf24a | 420 | |
85799a37 | 421 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 422 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
423 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
424 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 425 | |
454f18a9 | 426 | /* Send the init request */ |
85799a37 | 427 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 428 | sizeof(struct nvsp_message), |
85799a37 | 429 | (unsigned long)init_packet, |
415f2287 | 430 | VM_PKT_DATA_INBAND, |
5a4df290 | 431 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 432 | |
b8a3d52b | 433 | if (ret != 0) |
f157e78d | 434 | return ret; |
fceaf24a | 435 | |
5c5781b3 | 436 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 437 | |
f157e78d HZ |
438 | if (t == 0) |
439 | return -ETIMEDOUT; | |
fceaf24a | 440 | |
53d21fdb | 441 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
442 | NVSP_STAT_SUCCESS) |
443 | return -EINVAL; | |
fceaf24a | 444 | |
a1eabb01 | 445 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
446 | return 0; |
447 | ||
448 | /* NVSPv2 only: Send NDIS config */ | |
449 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
450 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d3c9d37 HZ |
451 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu + |
452 | ETH_HLEN; | |
1f5f3a75 | 453 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d HZ |
454 | |
455 | ret = vmbus_sendpacket(device->channel, init_packet, | |
456 | sizeof(struct nvsp_message), | |
457 | (unsigned long)init_packet, | |
458 | VM_PKT_DATA_INBAND, 0); | |
459 | ||
460 | return ret; | |
461 | } | |
462 | ||
463 | static int netvsc_connect_vsp(struct hv_device *device) | |
464 | { | |
465 | int ret; | |
466 | struct netvsc_device *net_device; | |
467 | struct nvsp_message *init_packet; | |
468 | int ndis_version; | |
469 | struct net_device *ndev; | |
a1eabb01 HZ |
470 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
471 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
472 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
473 | |
474 | net_device = get_outbound_net_device(device); | |
475 | if (!net_device) | |
476 | return -ENODEV; | |
477 | ndev = net_device->ndev; | |
478 | ||
479 | init_packet = &net_device->channel_init_pkt; | |
480 | ||
481 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
482 | for (i = num_ver - 1; i >= 0; i--) |
483 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
484 | ver_list[i]) == 0) { | |
485 | net_device->nvsp_version = ver_list[i]; | |
486 | break; | |
487 | } | |
488 | ||
489 | if (i < 0) { | |
0f48c72c | 490 | ret = -EPROTO; |
0c3b7b2f | 491 | goto cleanup; |
fceaf24a | 492 | } |
f157e78d HZ |
493 | |
494 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
495 | ||
454f18a9 | 496 | /* Send the ndis version */ |
85799a37 | 497 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 498 | |
a1eabb01 | 499 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 500 | ndis_version = 0x00060001; |
a1eabb01 HZ |
501 | else |
502 | ndis_version = 0x0006001e; | |
fceaf24a | 503 | |
53d21fdb HZ |
504 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
505 | init_packet->msg.v1_msg. | |
506 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 507 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
508 | init_packet->msg.v1_msg. |
509 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 510 | ndis_version & 0xFFFF; |
fceaf24a | 511 | |
454f18a9 | 512 | /* Send the init request */ |
85799a37 | 513 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
514 | sizeof(struct nvsp_message), |
515 | (unsigned long)init_packet, | |
516 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 517 | if (ret != 0) |
0c3b7b2f | 518 | goto cleanup; |
454f18a9 BP |
519 | |
520 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
521 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
522 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
523 | else | |
524 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 525 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 526 | |
c25aaf81 | 527 | ret = netvsc_init_buf(device); |
fceaf24a | 528 | |
0c3b7b2f | 529 | cleanup: |
fceaf24a HJ |
530 | return ret; |
531 | } | |
532 | ||
648dc598 | 533 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 534 | { |
c25aaf81 | 535 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
536 | } |
537 | ||
3e189519 | 538 | /* |
5a71ae30 | 539 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 540 | */ |
905620d1 | 541 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 542 | { |
85799a37 | 543 | struct netvsc_device *net_device; |
c38b9c71 | 544 | unsigned long flags; |
fceaf24a | 545 | |
2ddd5e5f | 546 | net_device = hv_get_drvdata(device); |
fceaf24a | 547 | |
648dc598 | 548 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 549 | |
3852409b | 550 | /* |
9d88f33a S |
551 | * Since we have already drained, we don't need to busy wait |
552 | * as was done in final_release_stor_device() | |
553 | * Note that we cannot set the ext pointer to NULL until | |
554 | * we have drained - to drain the outgoing packets, we need to | |
555 | * allow incoming packets. | |
3852409b | 556 | */ |
9d88f33a S |
557 | |
558 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 559 | hv_set_drvdata(device, NULL); |
9d88f33a | 560 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 561 | |
86c921af S |
562 | /* |
563 | * At this point, no one should be accessing net_device | |
564 | * except in here | |
565 | */ | |
c909ebbd | 566 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 567 | |
454f18a9 | 568 | /* Now, we can close the channel safely */ |
85799a37 | 569 | vmbus_close(device->channel); |
fceaf24a | 570 | |
454f18a9 | 571 | /* Release all resources */ |
aa99c479 | 572 | vfree(net_device->sub_cb_buf); |
f90251c8 | 573 | free_netvsc_device(net_device); |
21a80820 | 574 | return 0; |
fceaf24a HJ |
575 | } |
576 | ||
33be96e4 HZ |
577 | |
578 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
579 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
580 | ||
581 | /* | |
582 | * Get the percentage of available bytes to write in the ring. | |
583 | * The return value is in range from 0 to 100. | |
584 | */ | |
585 | static inline u32 hv_ringbuf_avail_percent( | |
586 | struct hv_ring_buffer_info *ring_info) | |
587 | { | |
588 | u32 avail_read, avail_write; | |
589 | ||
590 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
591 | ||
592 | return avail_write * 100 / ring_info->ring_datasize; | |
593 | } | |
594 | ||
c25aaf81 KS |
595 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
596 | u32 index) | |
597 | { | |
598 | sync_change_bit(index, net_device->send_section_map); | |
599 | } | |
600 | ||
97c1723a KS |
601 | static void netvsc_send_completion(struct netvsc_device *net_device, |
602 | struct hv_device *device, | |
85799a37 | 603 | struct vmpacket_descriptor *packet) |
fceaf24a | 604 | { |
85799a37 HZ |
605 | struct nvsp_message *nvsp_packet; |
606 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 607 | struct net_device *ndev; |
c25aaf81 | 608 | u32 send_index; |
fceaf24a | 609 | |
2ddd5e5f | 610 | ndev = net_device->ndev; |
fceaf24a | 611 | |
85799a37 | 612 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 613 | (packet->offset8 << 3)); |
fceaf24a | 614 | |
53d21fdb HZ |
615 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
616 | (nvsp_packet->hdr.msg_type == | |
617 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
618 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
619 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
620 | (nvsp_packet->hdr.msg_type == | |
621 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 622 | /* Copy the response back */ |
53d21fdb | 623 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 624 | sizeof(struct nvsp_message)); |
35abb21a | 625 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
626 | } else if (nvsp_packet->hdr.msg_type == |
627 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 628 | int num_outstanding_sends; |
5b54dac8 HZ |
629 | u16 q_idx = 0; |
630 | struct vmbus_channel *channel = device->channel; | |
631 | int queue_sends; | |
33be96e4 | 632 | |
454f18a9 | 633 | /* Get the send context */ |
85799a37 | 634 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 635 | packet->trans_id; |
fceaf24a | 636 | |
454f18a9 | 637 | /* Notify the layer above us */ |
5b54dac8 | 638 | if (nvsc_packet) { |
c25aaf81 KS |
639 | send_index = nvsc_packet->send_buf_index; |
640 | if (send_index != NETVSC_INVALID_INDEX) | |
641 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 HZ |
642 | q_idx = nvsc_packet->q_idx; |
643 | channel = nvsc_packet->channel; | |
893f6627 HZ |
644 | nvsc_packet->send_completion(nvsc_packet-> |
645 | send_completion_ctx); | |
5b54dac8 | 646 | } |
fceaf24a | 647 | |
33be96e4 HZ |
648 | num_outstanding_sends = |
649 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
650 | queue_sends = atomic_dec_return(&net_device-> |
651 | queue_sends[q_idx]); | |
1d06825b | 652 | |
dc5cd894 HZ |
653 | if (net_device->destroy && num_outstanding_sends == 0) |
654 | wake_up(&net_device->wait_drain); | |
655 | ||
5b54dac8 HZ |
656 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
657 | !net_device->start_remove && | |
658 | (hv_ringbuf_avail_percent(&channel->outbound) > | |
659 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
660 | netif_tx_wake_queue(netdev_get_tx_queue( | |
661 | ndev, q_idx)); | |
21a80820 | 662 | } else { |
d9871158 | 663 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 664 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
665 | } |
666 | ||
fceaf24a HJ |
667 | } |
668 | ||
c25aaf81 KS |
669 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
670 | { | |
671 | unsigned long index; | |
672 | u32 max_words = net_device->map_words; | |
673 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
674 | u32 section_cnt = net_device->send_section_cnt; | |
675 | int ret_val = NETVSC_INVALID_INDEX; | |
676 | int i; | |
677 | int prev_val; | |
678 | ||
679 | for (i = 0; i < max_words; i++) { | |
680 | if (!~(map_addr[i])) | |
681 | continue; | |
682 | index = ffz(map_addr[i]); | |
683 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
684 | if (prev_val) | |
685 | continue; | |
686 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
687 | break; | |
688 | ret_val = (index + (i * BITS_PER_LONG)); | |
689 | break; | |
690 | } | |
691 | return ret_val; | |
692 | } | |
693 | ||
da19fcd0 LP |
694 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
695 | unsigned int section_index, | |
7c3877f2 | 696 | u32 pend_size, |
da19fcd0 | 697 | struct hv_netvsc_packet *packet) |
c25aaf81 KS |
698 | { |
699 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
700 | char *dest = start + (section_index * net_device->send_section_size) |
701 | + pend_size; | |
c25aaf81 KS |
702 | int i; |
703 | u32 msg_size = 0; | |
7c3877f2 HZ |
704 | u32 padding = 0; |
705 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
706 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
707 | packet->page_buf_cnt; | |
7c3877f2 HZ |
708 | |
709 | /* Add padding */ | |
aa0a34be HZ |
710 | if (packet->is_data_pkt && packet->xmit_more && remain && |
711 | !packet->cp_partial) { | |
7c3877f2 HZ |
712 | padding = net_device->pkt_align - remain; |
713 | packet->rndis_msg->msg_len += padding; | |
714 | packet->total_data_buflen += padding; | |
715 | } | |
c25aaf81 | 716 | |
aa0a34be | 717 | for (i = 0; i < page_count; i++) { |
c25aaf81 KS |
718 | char *src = phys_to_virt(packet->page_buf[i].pfn << PAGE_SHIFT); |
719 | u32 offset = packet->page_buf[i].offset; | |
720 | u32 len = packet->page_buf[i].len; | |
721 | ||
722 | memcpy(dest, (src + offset), len); | |
723 | msg_size += len; | |
724 | dest += len; | |
725 | } | |
7c3877f2 HZ |
726 | |
727 | if (padding) { | |
728 | memset(dest, 0, padding); | |
729 | msg_size += padding; | |
730 | } | |
731 | ||
c25aaf81 KS |
732 | return msg_size; |
733 | } | |
734 | ||
7c3877f2 HZ |
735 | static inline int netvsc_send_pkt( |
736 | struct hv_netvsc_packet *packet, | |
737 | struct netvsc_device *net_device) | |
fceaf24a | 738 | { |
7c3877f2 HZ |
739 | struct nvsp_message nvmsg; |
740 | struct vmbus_channel *out_channel = packet->channel; | |
3a67c9cc | 741 | u16 q_idx = packet->q_idx; |
7c3877f2 HZ |
742 | struct net_device *ndev = net_device->ndev; |
743 | u64 req_id; | |
744 | int ret; | |
aa0a34be | 745 | struct hv_page_buffer *pgbuf; |
c25aaf81 | 746 | |
7c3877f2 | 747 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 748 | if (packet->is_data_pkt) { |
21a80820 | 749 | /* 0 is RMC_DATA; */ |
7c3877f2 | 750 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
751 | } else { |
752 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 753 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 754 | } |
fceaf24a | 755 | |
7c3877f2 HZ |
756 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
757 | packet->send_buf_index; | |
758 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
759 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
760 | else | |
761 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
762 | packet->total_data_buflen; | |
21a80820 | 763 | |
893f6627 | 764 | if (packet->send_completion) |
00ca8f0c | 765 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
766 | else |
767 | req_id = 0; | |
768 | ||
c3582a2c HZ |
769 | if (out_channel->rescind) |
770 | return -ENODEV; | |
771 | ||
72a2f5bd | 772 | if (packet->page_buf_cnt) { |
aa0a34be HZ |
773 | pgbuf = packet->cp_partial ? packet->page_buf + |
774 | packet->rmsg_pgcnt : packet->page_buf; | |
5b54dac8 | 775 | ret = vmbus_sendpacket_pagebuffer(out_channel, |
aa0a34be | 776 | pgbuf, |
72a2f5bd | 777 | packet->page_buf_cnt, |
7c3877f2 | 778 | &nvmsg, |
ff3f8eec | 779 | sizeof(struct nvsp_message), |
f1ea3cd7 | 780 | req_id); |
21a80820 | 781 | } else { |
7c3877f2 HZ |
782 | ret = vmbus_sendpacket( |
783 | out_channel, &nvmsg, | |
e4d59ac5 | 784 | sizeof(struct nvsp_message), |
f1ea3cd7 | 785 | req_id, |
e4d59ac5 HZ |
786 | VM_PKT_DATA_INBAND, |
787 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
788 | } |
789 | ||
1d06825b HZ |
790 | if (ret == 0) { |
791 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 792 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 HZ |
793 | |
794 | if (hv_ringbuf_avail_percent(&out_channel->outbound) < | |
33be96e4 | 795 | RING_AVAIL_PERCENT_LOWATER) { |
5b54dac8 | 796 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc | 797 | ndev, q_idx)); |
5b54dac8 | 798 | |
33be96e4 | 799 | if (atomic_read(&net_device-> |
3a67c9cc | 800 | queue_sends[q_idx]) < 1) |
5b54dac8 | 801 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 802 | ndev, q_idx)); |
33be96e4 | 803 | } |
1d06825b | 804 | } else if (ret == -EAGAIN) { |
5b54dac8 | 805 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
806 | ndev, q_idx)); |
807 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 808 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 809 | ndev, q_idx)); |
33be96e4 HZ |
810 | ret = -ENOSPC; |
811 | } | |
1d06825b | 812 | } else { |
d9871158 | 813 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 814 | packet, ret); |
1d06825b | 815 | } |
fceaf24a | 816 | |
7c3877f2 HZ |
817 | return ret; |
818 | } | |
819 | ||
820 | int netvsc_send(struct hv_device *device, | |
821 | struct hv_netvsc_packet *packet) | |
822 | { | |
823 | struct netvsc_device *net_device; | |
824 | int ret = 0, m_ret = 0; | |
825 | struct vmbus_channel *out_channel; | |
826 | u16 q_idx = packet->q_idx; | |
827 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
828 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
829 | struct sk_buff *skb = NULL; | |
830 | unsigned long flag; | |
831 | struct multi_send_data *msdp; | |
832 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
aa0a34be | 833 | bool try_batch; |
7c3877f2 HZ |
834 | |
835 | net_device = get_outbound_net_device(device); | |
836 | if (!net_device) | |
837 | return -ENODEV; | |
838 | ||
839 | out_channel = net_device->chn_table[q_idx]; | |
840 | if (!out_channel) { | |
841 | out_channel = device->channel; | |
842 | q_idx = 0; | |
843 | packet->q_idx = 0; | |
844 | } | |
845 | packet->channel = out_channel; | |
846 | packet->send_buf_index = NETVSC_INVALID_INDEX; | |
aa0a34be | 847 | packet->cp_partial = false; |
7c3877f2 HZ |
848 | |
849 | msdp = &net_device->msd[q_idx]; | |
850 | ||
851 | /* batch packets in send buffer if possible */ | |
852 | spin_lock_irqsave(&msdp->lock, flag); | |
853 | if (msdp->pkt) | |
854 | msd_len = msdp->pkt->total_data_buflen; | |
855 | ||
aa0a34be HZ |
856 | try_batch = packet->is_data_pkt && msd_len > 0 && msdp->count < |
857 | net_device->max_pkt; | |
858 | ||
859 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
860 | net_device->send_section_size) { |
861 | section_index = msdp->pkt->send_buf_index; | |
862 | ||
aa0a34be HZ |
863 | } else if (try_batch && msd_len + packet->rmsg_size < |
864 | net_device->send_section_size) { | |
865 | section_index = msdp->pkt->send_buf_index; | |
866 | packet->cp_partial = true; | |
867 | ||
7c3877f2 HZ |
868 | } else if (packet->is_data_pkt && pktlen + net_device->pkt_align < |
869 | net_device->send_section_size) { | |
870 | section_index = netvsc_get_next_send_section(net_device); | |
871 | if (section_index != NETVSC_INVALID_INDEX) { | |
872 | msd_send = msdp->pkt; | |
873 | msdp->pkt = NULL; | |
874 | msdp->count = 0; | |
875 | msd_len = 0; | |
876 | } | |
877 | } | |
878 | ||
879 | if (section_index != NETVSC_INVALID_INDEX) { | |
880 | netvsc_copy_to_send_buf(net_device, | |
881 | section_index, msd_len, | |
882 | packet); | |
b08cc791 | 883 | |
7c3877f2 | 884 | packet->send_buf_index = section_index; |
aa0a34be HZ |
885 | |
886 | if (packet->cp_partial) { | |
887 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
888 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
889 | } else { | |
890 | packet->page_buf_cnt = 0; | |
891 | packet->total_data_buflen += msd_len; | |
aa0a34be | 892 | } |
7c3877f2 | 893 | |
ee90b812 HZ |
894 | if (msdp->pkt) |
895 | netvsc_xmit_completion(msdp->pkt); | |
896 | ||
aa0a34be | 897 | if (packet->xmit_more && !packet->cp_partial) { |
7c3877f2 HZ |
898 | msdp->pkt = packet; |
899 | msdp->count++; | |
900 | } else { | |
901 | cur_send = packet; | |
902 | msdp->pkt = NULL; | |
903 | msdp->count = 0; | |
904 | } | |
905 | } else { | |
906 | msd_send = msdp->pkt; | |
907 | msdp->pkt = NULL; | |
908 | msdp->count = 0; | |
909 | cur_send = packet; | |
910 | } | |
911 | ||
912 | spin_unlock_irqrestore(&msdp->lock, flag); | |
913 | ||
914 | if (msd_send) { | |
915 | m_ret = netvsc_send_pkt(msd_send, net_device); | |
916 | ||
917 | if (m_ret != 0) { | |
918 | netvsc_free_send_slot(net_device, | |
919 | msd_send->send_buf_index); | |
ee90b812 | 920 | netvsc_xmit_completion(msd_send); |
7c3877f2 HZ |
921 | } |
922 | } | |
923 | ||
924 | if (cur_send) | |
925 | ret = netvsc_send_pkt(cur_send, net_device); | |
926 | ||
d953ca4d HZ |
927 | if (ret != 0) { |
928 | if (section_index != NETVSC_INVALID_INDEX) | |
929 | netvsc_free_send_slot(net_device, section_index); | |
930 | } else if (skb) { | |
931 | dev_kfree_skb_any(skb); | |
932 | } | |
933 | ||
fceaf24a HJ |
934 | return ret; |
935 | } | |
936 | ||
5fa9d3c5 | 937 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 938 | struct vmbus_channel *channel, |
97c1723a | 939 | struct netvsc_device *net_device, |
63f6921d | 940 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
941 | { |
942 | struct nvsp_message recvcompMessage; | |
943 | int retries = 0; | |
944 | int ret; | |
2ddd5e5f | 945 | struct net_device *ndev; |
2ddd5e5f S |
946 | |
947 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
948 | |
949 | recvcompMessage.hdr.msg_type = | |
950 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
951 | ||
63f6921d | 952 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
953 | |
954 | retry_send_cmplt: | |
955 | /* Send the completion */ | |
5b54dac8 | 956 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
957 | sizeof(struct nvsp_message), transaction_id, |
958 | VM_PKT_COMP, 0); | |
959 | if (ret == 0) { | |
960 | /* success */ | |
961 | /* no-op */ | |
d2598f01 | 962 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
963 | /* no more room...wait a bit and attempt to retry 3 times */ |
964 | retries++; | |
d9871158 | 965 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 966 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
967 | |
968 | if (retries < 4) { | |
969 | udelay(100); | |
970 | goto retry_send_cmplt; | |
971 | } else { | |
d9871158 | 972 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 973 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
974 | transaction_id); |
975 | } | |
976 | } else { | |
d9871158 | 977 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 978 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
979 | } |
980 | } | |
981 | ||
97c1723a | 982 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 983 | struct vmbus_channel *channel, |
97c1723a KS |
984 | struct hv_device *device, |
985 | struct vmpacket_descriptor *packet) | |
fceaf24a | 986 | { |
85799a37 HZ |
987 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
988 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
989 | struct hv_netvsc_packet nv_pkt; |
990 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
991 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
992 | int i; |
993 | int count = 0; | |
2ddd5e5f | 994 | struct net_device *ndev; |
779b4d17 | 995 | |
2ddd5e5f | 996 | ndev = net_device->ndev; |
fceaf24a | 997 | |
21a80820 GKH |
998 | /* |
999 | * All inbound packets other than send completion should be xfer page | |
1000 | * packet | |
1001 | */ | |
415f2287 | 1002 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 1003 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 1004 | packet->type); |
fceaf24a HJ |
1005 | return; |
1006 | } | |
1007 | ||
85799a37 | 1008 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1009 | (packet->offset8 << 3)); |
fceaf24a | 1010 | |
454f18a9 | 1011 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1012 | if (nvsp_packet->hdr.msg_type != |
1013 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 1014 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 1015 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
1016 | return; |
1017 | } | |
1018 | ||
85799a37 | 1019 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1020 | |
415f2287 | 1021 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 1022 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 1023 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 1024 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
1025 | return; |
1026 | } | |
1027 | ||
4baab261 | 1028 | count = vmxferpage_packet->range_cnt; |
4baab261 | 1029 | netvsc_packet->channel = channel; |
fceaf24a | 1030 | |
454f18a9 | 1031 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1032 | for (i = 0; i < count; i++) { |
454f18a9 | 1033 | /* Initialize the netvsc packet */ |
63f6921d | 1034 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
45326342 HZ |
1035 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
1036 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 1037 | netvsc_packet->total_data_buflen = |
415f2287 | 1038 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1039 | |
454f18a9 | 1040 | /* Pass it to the upper layer */ |
ac6f7859 | 1041 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 1042 | |
4baab261 HZ |
1043 | if (netvsc_packet->status != NVSP_STAT_SUCCESS) |
1044 | status = NVSP_STAT_FAIL; | |
fceaf24a HJ |
1045 | } |
1046 | ||
4baab261 HZ |
1047 | netvsc_send_recv_completion(device, channel, net_device, |
1048 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
1049 | } |
1050 | ||
5b54dac8 HZ |
1051 | |
1052 | static void netvsc_send_table(struct hv_device *hdev, | |
1053 | struct vmpacket_descriptor *vmpkt) | |
1054 | { | |
1055 | struct netvsc_device *nvscdev; | |
1056 | struct net_device *ndev; | |
1057 | struct nvsp_message *nvmsg; | |
1058 | int i; | |
1059 | u32 count, *tab; | |
1060 | ||
1061 | nvscdev = get_outbound_net_device(hdev); | |
1062 | if (!nvscdev) | |
1063 | return; | |
1064 | ndev = nvscdev->ndev; | |
1065 | ||
1066 | nvmsg = (struct nvsp_message *)((unsigned long)vmpkt + | |
1067 | (vmpkt->offset8 << 3)); | |
1068 | ||
1069 | if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE) | |
1070 | return; | |
1071 | ||
1072 | count = nvmsg->msg.v5_msg.send_table.count; | |
1073 | if (count != VRSS_SEND_TAB_SIZE) { | |
1074 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1075 | return; | |
1076 | } | |
1077 | ||
1078 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1079 | nvmsg->msg.v5_msg.send_table.offset); | |
1080 | ||
1081 | for (i = 0; i < count; i++) | |
1082 | nvscdev->send_table[i] = tab[i]; | |
1083 | } | |
1084 | ||
1085 | void netvsc_channel_cb(void *context) | |
fceaf24a | 1086 | { |
21a80820 | 1087 | int ret; |
5b54dac8 HZ |
1088 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
1089 | struct hv_device *device; | |
85799a37 HZ |
1090 | struct netvsc_device *net_device; |
1091 | u32 bytes_recvd; | |
1092 | u64 request_id; | |
8dc0a06a | 1093 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1094 | unsigned char *buffer; |
1095 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1096 | struct net_device *ndev; |
fceaf24a | 1097 | |
5b54dac8 HZ |
1098 | if (channel->primary_channel != NULL) |
1099 | device = channel->primary_channel->device_obj; | |
1100 | else | |
1101 | device = channel->device_obj; | |
1102 | ||
5a71ae30 | 1103 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1104 | if (!net_device) |
ee0c4c39 | 1105 | return; |
2ddd5e5f | 1106 | ndev = net_device->ndev; |
5b54dac8 | 1107 | buffer = get_per_channel_state(channel); |
fceaf24a | 1108 | |
21a80820 | 1109 | do { |
5b54dac8 | 1110 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1111 | &bytes_recvd, &request_id); |
21a80820 | 1112 | if (ret == 0) { |
85799a37 | 1113 | if (bytes_recvd > 0) { |
21a80820 | 1114 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
1115 | switch (desc->type) { |
1116 | case VM_PKT_COMP: | |
97c1723a KS |
1117 | netvsc_send_completion(net_device, |
1118 | device, desc); | |
21a80820 GKH |
1119 | break; |
1120 | ||
415f2287 | 1121 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
1122 | netvsc_receive(net_device, channel, |
1123 | device, desc); | |
1124 | break; | |
1125 | ||
1126 | case VM_PKT_DATA_INBAND: | |
1127 | netvsc_send_table(device, desc); | |
21a80820 GKH |
1128 | break; |
1129 | ||
1130 | default: | |
d9871158 | 1131 | netdev_err(ndev, |
21a80820 GKH |
1132 | "unhandled packet type %d, " |
1133 | "tid %llx len %d\n", | |
415f2287 | 1134 | desc->type, request_id, |
85799a37 | 1135 | bytes_recvd); |
21a80820 | 1136 | break; |
fceaf24a HJ |
1137 | } |
1138 | ||
21a80820 | 1139 | } else { |
ee0c4c39 KS |
1140 | /* |
1141 | * We are done for this pass. | |
1142 | */ | |
fceaf24a HJ |
1143 | break; |
1144 | } | |
ee0c4c39 | 1145 | |
3d5cad97 | 1146 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1147 | if (bufferlen > NETVSC_PACKET_SIZE) |
1148 | kfree(buffer); | |
21a80820 | 1149 | /* Handle large packet */ |
85799a37 | 1150 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1151 | if (buffer == NULL) { |
454f18a9 | 1152 | /* Try again next time around */ |
d9871158 | 1153 | netdev_err(ndev, |
21a80820 | 1154 | "unable to allocate buffer of size " |
c909ebbd | 1155 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1156 | break; |
1157 | } | |
1158 | ||
85799a37 | 1159 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1160 | } |
1161 | } while (1); | |
1162 | ||
ee0c4c39 KS |
1163 | if (bufferlen > NETVSC_PACKET_SIZE) |
1164 | kfree(buffer); | |
fceaf24a HJ |
1165 | return; |
1166 | } | |
af24ce42 | 1167 | |
b637e023 HZ |
1168 | /* |
1169 | * netvsc_device_add - Callback when the device belonging to this | |
1170 | * driver is added | |
1171 | */ | |
7bd23a4d | 1172 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1173 | { |
1174 | int ret = 0; | |
aae23986 S |
1175 | int ring_size = |
1176 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1177 | struct netvsc_device *net_device; |
2ddd5e5f | 1178 | struct net_device *ndev; |
b637e023 HZ |
1179 | |
1180 | net_device = alloc_net_device(device); | |
b1c84927 DC |
1181 | if (!net_device) |
1182 | return -ENOMEM; | |
b637e023 | 1183 | |
5b54dac8 HZ |
1184 | net_device->ring_size = ring_size; |
1185 | ||
2ddd5e5f S |
1186 | /* |
1187 | * Coming into this function, struct net_device * is | |
1188 | * registered as the driver private data. | |
1189 | * In alloc_net_device(), we register struct netvsc_device * | |
1190 | * as the driver private data and stash away struct net_device * | |
1191 | * in struct netvsc_device *. | |
1192 | */ | |
1193 | ndev = net_device->ndev; | |
1194 | ||
3f300ff4 SX |
1195 | /* Add netvsc_device context to netvsc_device */ |
1196 | net_device->nd_ctx = netdev_priv(ndev); | |
1197 | ||
b637e023 | 1198 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1199 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1200 | |
5b54dac8 HZ |
1201 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1202 | ||
b637e023 | 1203 | /* Open the channel */ |
aae23986 S |
1204 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1205 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1206 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1207 | |
1208 | if (ret != 0) { | |
d9871158 | 1209 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1210 | goto cleanup; |
1211 | } | |
1212 | ||
1213 | /* Channel is opened */ | |
c909ebbd | 1214 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1215 | |
5b54dac8 HZ |
1216 | net_device->chn_table[0] = device->channel; |
1217 | ||
b637e023 HZ |
1218 | /* Connect with the NetVsp */ |
1219 | ret = netvsc_connect_vsp(device); | |
1220 | if (ret != 0) { | |
d9871158 | 1221 | netdev_err(ndev, |
c909ebbd | 1222 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1223 | goto close; |
1224 | } | |
1225 | ||
1226 | return ret; | |
1227 | ||
1228 | close: | |
1229 | /* Now, we can close the channel safely */ | |
1230 | vmbus_close(device->channel); | |
1231 | ||
1232 | cleanup: | |
f90251c8 | 1233 | free_netvsc_device(net_device); |
b637e023 HZ |
1234 | |
1235 | return ret; | |
1236 | } |