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