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Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
5654e932 | 22 | #include <linux/kernel.h> |
0c3b7b2f S |
23 | #include <linux/sched.h> |
24 | #include <linux/wait.h> | |
0ffa63b0 | 25 | #include <linux/mm.h> |
b4362c9c | 26 | #include <linux/delay.h> |
21a80820 | 27 | #include <linux/io.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
d9871158 | 29 | #include <linux/netdevice.h> |
f157e78d | 30 | #include <linux/if_ether.h> |
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 | ||
dc5cd894 | 45 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 46 | net_device->start_remove = false; |
c38b9c71 | 47 | net_device->destroy = false; |
53d21fdb | 48 | net_device->dev = device; |
2ddd5e5f | 49 | net_device->ndev = ndev; |
fceaf24a | 50 | |
2ddd5e5f | 51 | hv_set_drvdata(device, net_device); |
85799a37 | 52 | return net_device; |
fceaf24a HJ |
53 | } |
54 | ||
5a71ae30 | 55 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 56 | { |
85799a37 | 57 | struct netvsc_device *net_device; |
fceaf24a | 58 | |
2ddd5e5f | 59 | net_device = hv_get_drvdata(device); |
9d88f33a | 60 | if (net_device && net_device->destroy) |
85799a37 | 61 | net_device = NULL; |
fceaf24a | 62 | |
85799a37 | 63 | return net_device; |
fceaf24a HJ |
64 | } |
65 | ||
5a71ae30 | 66 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 67 | { |
85799a37 | 68 | struct netvsc_device *net_device; |
fceaf24a | 69 | |
2ddd5e5f | 70 | net_device = hv_get_drvdata(device); |
9d88f33a S |
71 | |
72 | if (!net_device) | |
73 | goto get_in_err; | |
74 | ||
75 | if (net_device->destroy && | |
76 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 77 | net_device = NULL; |
fceaf24a | 78 | |
9d88f33a | 79 | get_in_err: |
85799a37 | 80 | return net_device; |
fceaf24a HJ |
81 | } |
82 | ||
fceaf24a | 83 | |
c25aaf81 | 84 | static int netvsc_destroy_buf(struct netvsc_device *net_device) |
ec91cd09 HZ |
85 | { |
86 | struct nvsp_message *revoke_packet; | |
87 | int ret = 0; | |
2ddd5e5f | 88 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
89 | |
90 | /* | |
91 | * If we got a section count, it means we received a | |
92 | * SendReceiveBufferComplete msg (ie sent | |
93 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
94 | * to send a revoke msg here | |
95 | */ | |
96 | if (net_device->recv_section_cnt) { | |
97 | /* Send the revoke receive buffer */ | |
98 | revoke_packet = &net_device->revoke_packet; | |
99 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
100 | ||
101 | revoke_packet->hdr.msg_type = | |
102 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
103 | revoke_packet->msg.v1_msg. | |
104 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
105 | ||
106 | ret = vmbus_sendpacket(net_device->dev->channel, | |
107 | revoke_packet, | |
108 | sizeof(struct nvsp_message), | |
109 | (unsigned long)revoke_packet, | |
110 | VM_PKT_DATA_INBAND, 0); | |
111 | /* | |
112 | * If we failed here, we might as well return and | |
113 | * have a leak rather than continue and a bugchk | |
114 | */ | |
115 | if (ret != 0) { | |
d9871158 | 116 | netdev_err(ndev, "unable to send " |
c909ebbd | 117 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 118 | return ret; |
ec91cd09 HZ |
119 | } |
120 | } | |
121 | ||
122 | /* Teardown the gpadl on the vsp end */ | |
123 | if (net_device->recv_buf_gpadl_handle) { | |
124 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
125 | net_device->recv_buf_gpadl_handle); | |
126 | ||
127 | /* If we failed here, we might as well return and have a leak | |
128 | * rather than continue and a bugchk | |
129 | */ | |
130 | if (ret != 0) { | |
d9871158 | 131 | netdev_err(ndev, |
c909ebbd | 132 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 133 | return ret; |
ec91cd09 HZ |
134 | } |
135 | net_device->recv_buf_gpadl_handle = 0; | |
136 | } | |
137 | ||
138 | if (net_device->recv_buf) { | |
139 | /* Free up the receive buffer */ | |
b679ef73 | 140 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
141 | net_device->recv_buf = NULL; |
142 | } | |
143 | ||
144 | if (net_device->recv_section) { | |
145 | net_device->recv_section_cnt = 0; | |
146 | kfree(net_device->recv_section); | |
147 | net_device->recv_section = NULL; | |
148 | } | |
149 | ||
c25aaf81 KS |
150 | /* Deal with the send buffer we may have setup. |
151 | * If we got a send section size, it means we received a | |
152 | * SendsendBufferComplete msg (ie sent | |
153 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
154 | * to send a revoke msg here | |
155 | */ | |
156 | if (net_device->send_section_size) { | |
157 | /* Send the revoke receive buffer */ | |
158 | revoke_packet = &net_device->revoke_packet; | |
159 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
160 | ||
161 | revoke_packet->hdr.msg_type = | |
162 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
163 | revoke_packet->msg.v1_msg.revoke_recv_buf.id = 0; | |
164 | ||
165 | ret = vmbus_sendpacket(net_device->dev->channel, | |
166 | revoke_packet, | |
167 | sizeof(struct nvsp_message), | |
168 | (unsigned long)revoke_packet, | |
169 | VM_PKT_DATA_INBAND, 0); | |
170 | /* If we failed here, we might as well return and | |
171 | * have a leak rather than continue and a bugchk | |
172 | */ | |
173 | if (ret != 0) { | |
174 | netdev_err(ndev, "unable to send " | |
175 | "revoke send buffer to netvsp\n"); | |
176 | return ret; | |
177 | } | |
178 | } | |
179 | /* Teardown the gpadl on the vsp end */ | |
180 | if (net_device->send_buf_gpadl_handle) { | |
181 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
182 | net_device->send_buf_gpadl_handle); | |
183 | ||
184 | /* If we failed here, we might as well return and have a leak | |
185 | * rather than continue and a bugchk | |
186 | */ | |
187 | if (ret != 0) { | |
188 | netdev_err(ndev, | |
189 | "unable to teardown send buffer's gpadl\n"); | |
190 | return ret; | |
191 | } | |
2f18423d | 192 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
193 | } |
194 | if (net_device->send_buf) { | |
195 | /* Free up the receive buffer */ | |
196 | free_pages((unsigned long)net_device->send_buf, | |
197 | get_order(net_device->send_buf_size)); | |
198 | net_device->send_buf = NULL; | |
199 | } | |
200 | kfree(net_device->send_section_map); | |
201 | ||
ec91cd09 HZ |
202 | return ret; |
203 | } | |
204 | ||
c25aaf81 | 205 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 206 | { |
21a80820 | 207 | int ret = 0; |
35abb21a | 208 | int t; |
85799a37 HZ |
209 | struct netvsc_device *net_device; |
210 | struct nvsp_message *init_packet; | |
2ddd5e5f | 211 | struct net_device *ndev; |
fceaf24a | 212 | |
5a71ae30 | 213 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 214 | if (!net_device) |
927bc33c | 215 | return -ENODEV; |
2ddd5e5f | 216 | ndev = net_device->ndev; |
fceaf24a | 217 | |
b679ef73 | 218 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); |
53d21fdb | 219 | if (!net_device->recv_buf) { |
d9871158 | 220 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 221 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 222 | ret = -ENOMEM; |
0c3b7b2f | 223 | goto cleanup; |
fceaf24a | 224 | } |
fceaf24a | 225 | |
454f18a9 BP |
226 | /* |
227 | * Establish the gpadl handle for this buffer on this | |
228 | * channel. Note: This call uses the vmbus connection rather | |
229 | * than the channel to establish the gpadl handle. | |
230 | */ | |
53d21fdb HZ |
231 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
232 | net_device->recv_buf_size, | |
233 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 234 | if (ret != 0) { |
d9871158 | 235 | netdev_err(ndev, |
c909ebbd | 236 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 237 | goto cleanup; |
fceaf24a HJ |
238 | } |
239 | ||
fceaf24a | 240 | |
454f18a9 | 241 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 242 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 243 | |
85799a37 | 244 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 245 | |
53d21fdb HZ |
246 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
247 | init_packet->msg.v1_msg.send_recv_buf. | |
248 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
249 | init_packet->msg.v1_msg. | |
250 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 251 | |
454f18a9 | 252 | /* Send the gpadl notification request */ |
85799a37 | 253 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 254 | sizeof(struct nvsp_message), |
85799a37 | 255 | (unsigned long)init_packet, |
415f2287 | 256 | VM_PKT_DATA_INBAND, |
5a4df290 | 257 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 258 | if (ret != 0) { |
d9871158 | 259 | netdev_err(ndev, |
c909ebbd | 260 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 261 | goto cleanup; |
fceaf24a HJ |
262 | } |
263 | ||
5c5781b3 | 264 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 265 | BUG_ON(t == 0); |
0c3b7b2f | 266 | |
fceaf24a | 267 | |
454f18a9 | 268 | /* Check the response */ |
53d21fdb HZ |
269 | if (init_packet->msg.v1_msg. |
270 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 271 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 272 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
273 | init_packet->msg.v1_msg. |
274 | send_recv_buf_complete.status); | |
927bc33c | 275 | ret = -EINVAL; |
0c3b7b2f | 276 | goto cleanup; |
fceaf24a HJ |
277 | } |
278 | ||
454f18a9 | 279 | /* Parse the response */ |
fceaf24a | 280 | |
53d21fdb HZ |
281 | net_device->recv_section_cnt = init_packet->msg. |
282 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 283 | |
c1813200 HZ |
284 | net_device->recv_section = kmemdup( |
285 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
286 | net_device->recv_section_cnt * | |
287 | sizeof(struct nvsp_1_receive_buffer_section), | |
288 | GFP_KERNEL); | |
53d21fdb | 289 | if (net_device->recv_section == NULL) { |
927bc33c | 290 | ret = -EINVAL; |
0c3b7b2f | 291 | goto cleanup; |
fceaf24a HJ |
292 | } |
293 | ||
21a80820 GKH |
294 | /* |
295 | * For 1st release, there should only be 1 section that represents the | |
296 | * entire receive buffer | |
297 | */ | |
53d21fdb HZ |
298 | if (net_device->recv_section_cnt != 1 || |
299 | net_device->recv_section->offset != 0) { | |
927bc33c | 300 | ret = -EINVAL; |
0c3b7b2f | 301 | goto cleanup; |
fceaf24a HJ |
302 | } |
303 | ||
c25aaf81 KS |
304 | /* Now setup the send buffer. |
305 | */ | |
306 | net_device->send_buf = | |
307 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, | |
308 | get_order(net_device->send_buf_size)); | |
309 | if (!net_device->send_buf) { | |
310 | netdev_err(ndev, "unable to allocate send " | |
311 | "buffer of size %d\n", net_device->send_buf_size); | |
312 | ret = -ENOMEM; | |
313 | goto cleanup; | |
314 | } | |
315 | ||
316 | /* Establish the gpadl handle for this buffer on this | |
317 | * channel. Note: This call uses the vmbus connection rather | |
318 | * than the channel to establish the gpadl handle. | |
319 | */ | |
320 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
321 | net_device->send_buf_size, | |
322 | &net_device->send_buf_gpadl_handle); | |
323 | if (ret != 0) { | |
324 | netdev_err(ndev, | |
325 | "unable to establish send buffer's gpadl\n"); | |
326 | goto cleanup; | |
327 | } | |
328 | ||
329 | /* Notify the NetVsp of the gpadl handle */ | |
330 | init_packet = &net_device->channel_init_pkt; | |
331 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
332 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
333 | init_packet->msg.v1_msg.send_recv_buf.gpadl_handle = | |
334 | net_device->send_buf_gpadl_handle; | |
335 | init_packet->msg.v1_msg.send_recv_buf.id = 0; | |
336 | ||
337 | /* Send the gpadl notification request */ | |
338 | ret = vmbus_sendpacket(device->channel, init_packet, | |
339 | sizeof(struct nvsp_message), | |
340 | (unsigned long)init_packet, | |
341 | VM_PKT_DATA_INBAND, | |
342 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
343 | if (ret != 0) { | |
344 | netdev_err(ndev, | |
345 | "unable to send send buffer's gpadl to netvsp\n"); | |
346 | goto cleanup; | |
347 | } | |
348 | ||
349 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
350 | BUG_ON(t == 0); | |
351 | ||
352 | /* Check the response */ | |
353 | if (init_packet->msg.v1_msg. | |
354 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
355 | netdev_err(ndev, "Unable to complete send buffer " | |
356 | "initialization with NetVsp - status %d\n", | |
357 | init_packet->msg.v1_msg. | |
358 | send_recv_buf_complete.status); | |
359 | ret = -EINVAL; | |
360 | goto cleanup; | |
361 | } | |
362 | ||
363 | /* Parse the response */ | |
364 | net_device->send_section_size = init_packet->msg. | |
365 | v1_msg.send_send_buf_complete.section_size; | |
366 | ||
367 | /* Section count is simply the size divided by the section size. | |
368 | */ | |
369 | net_device->send_section_cnt = | |
370 | net_device->send_buf_size/net_device->send_section_size; | |
371 | ||
372 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
373 | net_device->send_section_size, net_device->send_section_cnt); | |
374 | ||
375 | /* Setup state for managing the send buffer. */ | |
376 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
377 | BITS_PER_LONG); | |
378 | ||
379 | net_device->send_section_map = | |
380 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
381 | if (net_device->send_section_map == NULL) { |
382 | ret = -ENOMEM; | |
c25aaf81 | 383 | goto cleanup; |
dd1d3f8f | 384 | } |
c25aaf81 | 385 | |
0c3b7b2f | 386 | goto exit; |
fceaf24a | 387 | |
0c3b7b2f | 388 | cleanup: |
c25aaf81 | 389 | netvsc_destroy_buf(net_device); |
fceaf24a | 390 | |
0c3b7b2f | 391 | exit: |
fceaf24a HJ |
392 | return ret; |
393 | } | |
394 | ||
fceaf24a | 395 | |
f157e78d HZ |
396 | /* Negotiate NVSP protocol version */ |
397 | static int negotiate_nvsp_ver(struct hv_device *device, | |
398 | struct netvsc_device *net_device, | |
399 | struct nvsp_message *init_packet, | |
400 | u32 nvsp_ver) | |
fceaf24a | 401 | { |
35abb21a | 402 | int ret, t; |
fceaf24a | 403 | |
85799a37 | 404 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 405 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
406 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
407 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 408 | |
454f18a9 | 409 | /* Send the init request */ |
85799a37 | 410 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 411 | sizeof(struct nvsp_message), |
85799a37 | 412 | (unsigned long)init_packet, |
415f2287 | 413 | VM_PKT_DATA_INBAND, |
5a4df290 | 414 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 415 | |
b8a3d52b | 416 | if (ret != 0) |
f157e78d | 417 | return ret; |
fceaf24a | 418 | |
5c5781b3 | 419 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 420 | |
f157e78d HZ |
421 | if (t == 0) |
422 | return -ETIMEDOUT; | |
fceaf24a | 423 | |
53d21fdb | 424 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
425 | NVSP_STAT_SUCCESS) |
426 | return -EINVAL; | |
fceaf24a | 427 | |
a1eabb01 | 428 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
429 | return 0; |
430 | ||
431 | /* NVSPv2 only: Send NDIS config */ | |
432 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
433 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d447c9a | 434 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu; |
1f5f3a75 | 435 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d HZ |
436 | |
437 | ret = vmbus_sendpacket(device->channel, init_packet, | |
438 | sizeof(struct nvsp_message), | |
439 | (unsigned long)init_packet, | |
440 | VM_PKT_DATA_INBAND, 0); | |
441 | ||
442 | return ret; | |
443 | } | |
444 | ||
445 | static int netvsc_connect_vsp(struct hv_device *device) | |
446 | { | |
447 | int ret; | |
448 | struct netvsc_device *net_device; | |
449 | struct nvsp_message *init_packet; | |
450 | int ndis_version; | |
451 | struct net_device *ndev; | |
a1eabb01 HZ |
452 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
453 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
454 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
455 | |
456 | net_device = get_outbound_net_device(device); | |
457 | if (!net_device) | |
458 | return -ENODEV; | |
459 | ndev = net_device->ndev; | |
460 | ||
461 | init_packet = &net_device->channel_init_pkt; | |
462 | ||
463 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
464 | for (i = num_ver - 1; i >= 0; i--) |
465 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
466 | ver_list[i]) == 0) { | |
467 | net_device->nvsp_version = ver_list[i]; | |
468 | break; | |
469 | } | |
470 | ||
471 | if (i < 0) { | |
0f48c72c | 472 | ret = -EPROTO; |
0c3b7b2f | 473 | goto cleanup; |
fceaf24a | 474 | } |
f157e78d HZ |
475 | |
476 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
477 | ||
454f18a9 | 478 | /* Send the ndis version */ |
85799a37 | 479 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 480 | |
a1eabb01 | 481 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 482 | ndis_version = 0x00060001; |
a1eabb01 HZ |
483 | else |
484 | ndis_version = 0x0006001e; | |
fceaf24a | 485 | |
53d21fdb HZ |
486 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
487 | init_packet->msg.v1_msg. | |
488 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 489 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
490 | init_packet->msg.v1_msg. |
491 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 492 | ndis_version & 0xFFFF; |
fceaf24a | 493 | |
454f18a9 | 494 | /* Send the init request */ |
85799a37 | 495 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
496 | sizeof(struct nvsp_message), |
497 | (unsigned long)init_packet, | |
498 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 499 | if (ret != 0) |
0c3b7b2f | 500 | goto cleanup; |
454f18a9 BP |
501 | |
502 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
503 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
504 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
505 | else | |
506 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 507 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 508 | |
c25aaf81 | 509 | ret = netvsc_init_buf(device); |
fceaf24a | 510 | |
0c3b7b2f | 511 | cleanup: |
fceaf24a HJ |
512 | return ret; |
513 | } | |
514 | ||
648dc598 | 515 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 516 | { |
c25aaf81 | 517 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
518 | } |
519 | ||
3e189519 | 520 | /* |
5a71ae30 | 521 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 522 | */ |
905620d1 | 523 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 524 | { |
85799a37 | 525 | struct netvsc_device *net_device; |
c38b9c71 | 526 | unsigned long flags; |
fceaf24a | 527 | |
2ddd5e5f | 528 | net_device = hv_get_drvdata(device); |
fceaf24a | 529 | |
648dc598 | 530 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 531 | |
3852409b | 532 | /* |
9d88f33a S |
533 | * Since we have already drained, we don't need to busy wait |
534 | * as was done in final_release_stor_device() | |
535 | * Note that we cannot set the ext pointer to NULL until | |
536 | * we have drained - to drain the outgoing packets, we need to | |
537 | * allow incoming packets. | |
3852409b | 538 | */ |
9d88f33a S |
539 | |
540 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 541 | hv_set_drvdata(device, NULL); |
9d88f33a | 542 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 543 | |
86c921af S |
544 | /* |
545 | * At this point, no one should be accessing net_device | |
546 | * except in here | |
547 | */ | |
c909ebbd | 548 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 549 | |
454f18a9 | 550 | /* Now, we can close the channel safely */ |
85799a37 | 551 | vmbus_close(device->channel); |
fceaf24a | 552 | |
454f18a9 | 553 | /* Release all resources */ |
5b54dac8 HZ |
554 | if (net_device->sub_cb_buf) |
555 | vfree(net_device->sub_cb_buf); | |
556 | ||
356c4657 | 557 | kfree(net_device); |
21a80820 | 558 | return 0; |
fceaf24a HJ |
559 | } |
560 | ||
33be96e4 HZ |
561 | |
562 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
563 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
564 | ||
565 | /* | |
566 | * Get the percentage of available bytes to write in the ring. | |
567 | * The return value is in range from 0 to 100. | |
568 | */ | |
569 | static inline u32 hv_ringbuf_avail_percent( | |
570 | struct hv_ring_buffer_info *ring_info) | |
571 | { | |
572 | u32 avail_read, avail_write; | |
573 | ||
574 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
575 | ||
576 | return avail_write * 100 / ring_info->ring_datasize; | |
577 | } | |
578 | ||
c25aaf81 KS |
579 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
580 | u32 index) | |
581 | { | |
582 | sync_change_bit(index, net_device->send_section_map); | |
583 | } | |
584 | ||
97c1723a KS |
585 | static void netvsc_send_completion(struct netvsc_device *net_device, |
586 | struct hv_device *device, | |
85799a37 | 587 | struct vmpacket_descriptor *packet) |
fceaf24a | 588 | { |
85799a37 HZ |
589 | struct nvsp_message *nvsp_packet; |
590 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 591 | struct net_device *ndev; |
c25aaf81 | 592 | u32 send_index; |
fceaf24a | 593 | |
2ddd5e5f | 594 | ndev = net_device->ndev; |
fceaf24a | 595 | |
85799a37 | 596 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 597 | (packet->offset8 << 3)); |
fceaf24a | 598 | |
53d21fdb HZ |
599 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
600 | (nvsp_packet->hdr.msg_type == | |
601 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
602 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
603 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
604 | (nvsp_packet->hdr.msg_type == | |
605 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 606 | /* Copy the response back */ |
53d21fdb | 607 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 608 | sizeof(struct nvsp_message)); |
35abb21a | 609 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
610 | } else if (nvsp_packet->hdr.msg_type == |
611 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 612 | int num_outstanding_sends; |
5b54dac8 HZ |
613 | u16 q_idx = 0; |
614 | struct vmbus_channel *channel = device->channel; | |
615 | int queue_sends; | |
33be96e4 | 616 | |
454f18a9 | 617 | /* Get the send context */ |
85799a37 | 618 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 619 | packet->trans_id; |
fceaf24a | 620 | |
454f18a9 | 621 | /* Notify the layer above us */ |
5b54dac8 | 622 | if (nvsc_packet) { |
c25aaf81 KS |
623 | send_index = nvsc_packet->send_buf_index; |
624 | if (send_index != NETVSC_INVALID_INDEX) | |
625 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 HZ |
626 | q_idx = nvsc_packet->q_idx; |
627 | channel = nvsc_packet->channel; | |
893f6627 HZ |
628 | nvsc_packet->send_completion(nvsc_packet-> |
629 | send_completion_ctx); | |
5b54dac8 | 630 | } |
fceaf24a | 631 | |
33be96e4 HZ |
632 | num_outstanding_sends = |
633 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
634 | queue_sends = atomic_dec_return(&net_device-> |
635 | queue_sends[q_idx]); | |
1d06825b | 636 | |
dc5cd894 HZ |
637 | if (net_device->destroy && num_outstanding_sends == 0) |
638 | wake_up(&net_device->wait_drain); | |
639 | ||
5b54dac8 HZ |
640 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
641 | !net_device->start_remove && | |
642 | (hv_ringbuf_avail_percent(&channel->outbound) > | |
643 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
644 | netif_tx_wake_queue(netdev_get_tx_queue( | |
645 | ndev, q_idx)); | |
21a80820 | 646 | } else { |
d9871158 | 647 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 648 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
649 | } |
650 | ||
fceaf24a HJ |
651 | } |
652 | ||
c25aaf81 KS |
653 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
654 | { | |
655 | unsigned long index; | |
656 | u32 max_words = net_device->map_words; | |
657 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
658 | u32 section_cnt = net_device->send_section_cnt; | |
659 | int ret_val = NETVSC_INVALID_INDEX; | |
660 | int i; | |
661 | int prev_val; | |
662 | ||
663 | for (i = 0; i < max_words; i++) { | |
664 | if (!~(map_addr[i])) | |
665 | continue; | |
666 | index = ffz(map_addr[i]); | |
667 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
668 | if (prev_val) | |
669 | continue; | |
670 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
671 | break; | |
672 | ret_val = (index + (i * BITS_PER_LONG)); | |
673 | break; | |
674 | } | |
675 | return ret_val; | |
676 | } | |
677 | ||
678 | u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, | |
679 | unsigned int section_index, | |
680 | struct hv_netvsc_packet *packet) | |
681 | { | |
682 | char *start = net_device->send_buf; | |
683 | char *dest = (start + (section_index * net_device->send_section_size)); | |
684 | int i; | |
685 | u32 msg_size = 0; | |
686 | ||
687 | for (i = 0; i < packet->page_buf_cnt; i++) { | |
688 | char *src = phys_to_virt(packet->page_buf[i].pfn << PAGE_SHIFT); | |
689 | u32 offset = packet->page_buf[i].offset; | |
690 | u32 len = packet->page_buf[i].len; | |
691 | ||
692 | memcpy(dest, (src + offset), len); | |
693 | msg_size += len; | |
694 | dest += len; | |
695 | } | |
696 | return msg_size; | |
697 | } | |
698 | ||
f9819f05 | 699 | int netvsc_send(struct hv_device *device, |
85799a37 | 700 | struct hv_netvsc_packet *packet) |
fceaf24a | 701 | { |
85799a37 | 702 | struct netvsc_device *net_device; |
21a80820 | 703 | int ret = 0; |
223c1aa6 | 704 | struct nvsp_message sendMessage; |
2ddd5e5f | 705 | struct net_device *ndev; |
5b54dac8 | 706 | struct vmbus_channel *out_channel = NULL; |
f1ea3cd7 | 707 | u64 req_id; |
c25aaf81 KS |
708 | unsigned int section_index = NETVSC_INVALID_INDEX; |
709 | u32 msg_size = 0; | |
710 | struct sk_buff *skb; | |
711 | ||
fceaf24a | 712 | |
5a71ae30 | 713 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 714 | if (!net_device) |
ff2bd69a | 715 | return -ENODEV; |
2ddd5e5f | 716 | ndev = net_device->ndev; |
fceaf24a | 717 | |
53d21fdb | 718 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 719 | if (packet->is_data_pkt) { |
21a80820 | 720 | /* 0 is RMC_DATA; */ |
53d21fdb | 721 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
722 | } else { |
723 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 724 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 725 | } |
fceaf24a | 726 | |
c25aaf81 KS |
727 | /* Attempt to send via sendbuf */ |
728 | if (packet->total_data_buflen < net_device->send_section_size) { | |
729 | section_index = netvsc_get_next_send_section(net_device); | |
730 | if (section_index != NETVSC_INVALID_INDEX) { | |
731 | msg_size = netvsc_copy_to_send_buf(net_device, | |
732 | section_index, | |
733 | packet); | |
734 | skb = (struct sk_buff *) | |
735 | (unsigned long)packet->send_completion_tid; | |
736 | if (skb) | |
737 | dev_kfree_skb_any(skb); | |
738 | packet->page_buf_cnt = 0; | |
739 | } | |
740 | } | |
741 | packet->send_buf_index = section_index; | |
742 | ||
743 | ||
53d21fdb | 744 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
c25aaf81 KS |
745 | section_index; |
746 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = msg_size; | |
21a80820 | 747 | |
893f6627 | 748 | if (packet->send_completion) |
00ca8f0c | 749 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
750 | else |
751 | req_id = 0; | |
752 | ||
5b54dac8 HZ |
753 | out_channel = net_device->chn_table[packet->q_idx]; |
754 | if (out_channel == NULL) | |
755 | out_channel = device->channel; | |
756 | packet->channel = out_channel; | |
757 | ||
72a2f5bd | 758 | if (packet->page_buf_cnt) { |
5b54dac8 | 759 | ret = vmbus_sendpacket_pagebuffer(out_channel, |
72a2f5bd HZ |
760 | packet->page_buf, |
761 | packet->page_buf_cnt, | |
ff3f8eec GKH |
762 | &sendMessage, |
763 | sizeof(struct nvsp_message), | |
f1ea3cd7 | 764 | req_id); |
21a80820 | 765 | } else { |
5b54dac8 | 766 | ret = vmbus_sendpacket(out_channel, &sendMessage, |
e4d59ac5 | 767 | sizeof(struct nvsp_message), |
f1ea3cd7 | 768 | req_id, |
e4d59ac5 HZ |
769 | VM_PKT_DATA_INBAND, |
770 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
771 | } |
772 | ||
1d06825b HZ |
773 | if (ret == 0) { |
774 | atomic_inc(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
775 | atomic_inc(&net_device->queue_sends[packet->q_idx]); |
776 | ||
777 | if (hv_ringbuf_avail_percent(&out_channel->outbound) < | |
33be96e4 | 778 | RING_AVAIL_PERCENT_LOWATER) { |
5b54dac8 HZ |
779 | netif_tx_stop_queue(netdev_get_tx_queue( |
780 | ndev, packet->q_idx)); | |
781 | ||
33be96e4 | 782 | if (atomic_read(&net_device-> |
5b54dac8 HZ |
783 | queue_sends[packet->q_idx]) < 1) |
784 | netif_tx_wake_queue(netdev_get_tx_queue( | |
785 | ndev, packet->q_idx)); | |
33be96e4 | 786 | } |
1d06825b | 787 | } else if (ret == -EAGAIN) { |
5b54dac8 HZ |
788 | netif_tx_stop_queue(netdev_get_tx_queue( |
789 | ndev, packet->q_idx)); | |
790 | if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) { | |
791 | netif_tx_wake_queue(netdev_get_tx_queue( | |
792 | ndev, packet->q_idx)); | |
33be96e4 HZ |
793 | ret = -ENOSPC; |
794 | } | |
1d06825b | 795 | } else { |
d9871158 | 796 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 797 | packet, ret); |
1d06825b | 798 | } |
fceaf24a | 799 | |
fceaf24a HJ |
800 | return ret; |
801 | } | |
802 | ||
5fa9d3c5 | 803 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 804 | struct vmbus_channel *channel, |
97c1723a | 805 | struct netvsc_device *net_device, |
63f6921d | 806 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
807 | { |
808 | struct nvsp_message recvcompMessage; | |
809 | int retries = 0; | |
810 | int ret; | |
2ddd5e5f | 811 | struct net_device *ndev; |
2ddd5e5f S |
812 | |
813 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
814 | |
815 | recvcompMessage.hdr.msg_type = | |
816 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
817 | ||
63f6921d | 818 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
819 | |
820 | retry_send_cmplt: | |
821 | /* Send the completion */ | |
5b54dac8 | 822 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
823 | sizeof(struct nvsp_message), transaction_id, |
824 | VM_PKT_COMP, 0); | |
825 | if (ret == 0) { | |
826 | /* success */ | |
827 | /* no-op */ | |
d2598f01 | 828 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
829 | /* no more room...wait a bit and attempt to retry 3 times */ |
830 | retries++; | |
d9871158 | 831 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 832 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
833 | |
834 | if (retries < 4) { | |
835 | udelay(100); | |
836 | goto retry_send_cmplt; | |
837 | } else { | |
d9871158 | 838 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 839 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
840 | transaction_id); |
841 | } | |
842 | } else { | |
d9871158 | 843 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 844 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
845 | } |
846 | } | |
847 | ||
97c1723a | 848 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 849 | struct vmbus_channel *channel, |
97c1723a KS |
850 | struct hv_device *device, |
851 | struct vmpacket_descriptor *packet) | |
fceaf24a | 852 | { |
85799a37 HZ |
853 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
854 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
855 | struct hv_netvsc_packet nv_pkt; |
856 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
857 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
858 | int i; |
859 | int count = 0; | |
2ddd5e5f | 860 | struct net_device *ndev; |
779b4d17 | 861 | |
2ddd5e5f | 862 | ndev = net_device->ndev; |
fceaf24a | 863 | |
21a80820 GKH |
864 | /* |
865 | * All inbound packets other than send completion should be xfer page | |
866 | * packet | |
867 | */ | |
415f2287 | 868 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 869 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 870 | packet->type); |
fceaf24a HJ |
871 | return; |
872 | } | |
873 | ||
85799a37 | 874 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 875 | (packet->offset8 << 3)); |
fceaf24a | 876 | |
454f18a9 | 877 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
878 | if (nvsp_packet->hdr.msg_type != |
879 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 880 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 881 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
882 | return; |
883 | } | |
884 | ||
85799a37 | 885 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 886 | |
415f2287 | 887 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 888 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 889 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 890 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
891 | return; |
892 | } | |
893 | ||
4baab261 HZ |
894 | count = vmxferpage_packet->range_cnt; |
895 | netvsc_packet->device = device; | |
896 | netvsc_packet->channel = channel; | |
fceaf24a | 897 | |
454f18a9 | 898 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 899 | for (i = 0; i < count; i++) { |
454f18a9 | 900 | /* Initialize the netvsc packet */ |
63f6921d | 901 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
45326342 HZ |
902 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
903 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 904 | netvsc_packet->total_data_buflen = |
415f2287 | 905 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 906 | |
454f18a9 | 907 | /* Pass it to the upper layer */ |
ac6f7859 | 908 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 909 | |
4baab261 HZ |
910 | if (netvsc_packet->status != NVSP_STAT_SUCCESS) |
911 | status = NVSP_STAT_FAIL; | |
fceaf24a HJ |
912 | } |
913 | ||
4baab261 HZ |
914 | netvsc_send_recv_completion(device, channel, net_device, |
915 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
916 | } |
917 | ||
5b54dac8 HZ |
918 | |
919 | static void netvsc_send_table(struct hv_device *hdev, | |
920 | struct vmpacket_descriptor *vmpkt) | |
921 | { | |
922 | struct netvsc_device *nvscdev; | |
923 | struct net_device *ndev; | |
924 | struct nvsp_message *nvmsg; | |
925 | int i; | |
926 | u32 count, *tab; | |
927 | ||
928 | nvscdev = get_outbound_net_device(hdev); | |
929 | if (!nvscdev) | |
930 | return; | |
931 | ndev = nvscdev->ndev; | |
932 | ||
933 | nvmsg = (struct nvsp_message *)((unsigned long)vmpkt + | |
934 | (vmpkt->offset8 << 3)); | |
935 | ||
936 | if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE) | |
937 | return; | |
938 | ||
939 | count = nvmsg->msg.v5_msg.send_table.count; | |
940 | if (count != VRSS_SEND_TAB_SIZE) { | |
941 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
942 | return; | |
943 | } | |
944 | ||
945 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
946 | nvmsg->msg.v5_msg.send_table.offset); | |
947 | ||
948 | for (i = 0; i < count; i++) | |
949 | nvscdev->send_table[i] = tab[i]; | |
950 | } | |
951 | ||
952 | void netvsc_channel_cb(void *context) | |
fceaf24a | 953 | { |
21a80820 | 954 | int ret; |
5b54dac8 HZ |
955 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
956 | struct hv_device *device; | |
85799a37 HZ |
957 | struct netvsc_device *net_device; |
958 | u32 bytes_recvd; | |
959 | u64 request_id; | |
8dc0a06a | 960 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
961 | unsigned char *buffer; |
962 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 963 | struct net_device *ndev; |
fceaf24a | 964 | |
5b54dac8 HZ |
965 | if (channel->primary_channel != NULL) |
966 | device = channel->primary_channel->device_obj; | |
967 | else | |
968 | device = channel->device_obj; | |
969 | ||
5a71ae30 | 970 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 971 | if (!net_device) |
ee0c4c39 | 972 | return; |
2ddd5e5f | 973 | ndev = net_device->ndev; |
5b54dac8 | 974 | buffer = get_per_channel_state(channel); |
fceaf24a | 975 | |
21a80820 | 976 | do { |
5b54dac8 | 977 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 978 | &bytes_recvd, &request_id); |
21a80820 | 979 | if (ret == 0) { |
85799a37 | 980 | if (bytes_recvd > 0) { |
21a80820 | 981 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
982 | switch (desc->type) { |
983 | case VM_PKT_COMP: | |
97c1723a KS |
984 | netvsc_send_completion(net_device, |
985 | device, desc); | |
21a80820 GKH |
986 | break; |
987 | ||
415f2287 | 988 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
989 | netvsc_receive(net_device, channel, |
990 | device, desc); | |
991 | break; | |
992 | ||
993 | case VM_PKT_DATA_INBAND: | |
994 | netvsc_send_table(device, desc); | |
21a80820 GKH |
995 | break; |
996 | ||
997 | default: | |
d9871158 | 998 | netdev_err(ndev, |
21a80820 GKH |
999 | "unhandled packet type %d, " |
1000 | "tid %llx len %d\n", | |
415f2287 | 1001 | desc->type, request_id, |
85799a37 | 1002 | bytes_recvd); |
21a80820 | 1003 | break; |
fceaf24a HJ |
1004 | } |
1005 | ||
21a80820 | 1006 | } else { |
ee0c4c39 KS |
1007 | /* |
1008 | * We are done for this pass. | |
1009 | */ | |
fceaf24a HJ |
1010 | break; |
1011 | } | |
ee0c4c39 | 1012 | |
3d5cad97 | 1013 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1014 | if (bufferlen > NETVSC_PACKET_SIZE) |
1015 | kfree(buffer); | |
21a80820 | 1016 | /* Handle large packet */ |
85799a37 | 1017 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1018 | if (buffer == NULL) { |
454f18a9 | 1019 | /* Try again next time around */ |
d9871158 | 1020 | netdev_err(ndev, |
21a80820 | 1021 | "unable to allocate buffer of size " |
c909ebbd | 1022 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1023 | break; |
1024 | } | |
1025 | ||
85799a37 | 1026 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1027 | } |
1028 | } while (1); | |
1029 | ||
ee0c4c39 KS |
1030 | if (bufferlen > NETVSC_PACKET_SIZE) |
1031 | kfree(buffer); | |
fceaf24a HJ |
1032 | return; |
1033 | } | |
af24ce42 | 1034 | |
b637e023 HZ |
1035 | /* |
1036 | * netvsc_device_add - Callback when the device belonging to this | |
1037 | * driver is added | |
1038 | */ | |
7bd23a4d | 1039 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1040 | { |
1041 | int ret = 0; | |
aae23986 S |
1042 | int ring_size = |
1043 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1044 | struct netvsc_device *net_device; |
2ddd5e5f | 1045 | struct net_device *ndev; |
b637e023 HZ |
1046 | |
1047 | net_device = alloc_net_device(device); | |
1048 | if (!net_device) { | |
ace163a8 | 1049 | ret = -ENOMEM; |
b637e023 HZ |
1050 | goto cleanup; |
1051 | } | |
1052 | ||
5b54dac8 HZ |
1053 | net_device->ring_size = ring_size; |
1054 | ||
2ddd5e5f S |
1055 | /* |
1056 | * Coming into this function, struct net_device * is | |
1057 | * registered as the driver private data. | |
1058 | * In alloc_net_device(), we register struct netvsc_device * | |
1059 | * as the driver private data and stash away struct net_device * | |
1060 | * in struct netvsc_device *. | |
1061 | */ | |
1062 | ndev = net_device->ndev; | |
1063 | ||
b637e023 | 1064 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1065 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1066 | |
5b54dac8 HZ |
1067 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1068 | ||
b637e023 | 1069 | /* Open the channel */ |
aae23986 S |
1070 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1071 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1072 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1073 | |
1074 | if (ret != 0) { | |
d9871158 | 1075 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1076 | goto cleanup; |
1077 | } | |
1078 | ||
1079 | /* Channel is opened */ | |
c909ebbd | 1080 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1081 | |
5b54dac8 HZ |
1082 | net_device->chn_table[0] = device->channel; |
1083 | ||
b637e023 HZ |
1084 | /* Connect with the NetVsp */ |
1085 | ret = netvsc_connect_vsp(device); | |
1086 | if (ret != 0) { | |
d9871158 | 1087 | netdev_err(ndev, |
c909ebbd | 1088 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1089 | goto close; |
1090 | } | |
1091 | ||
1092 | return ret; | |
1093 | ||
1094 | close: | |
1095 | /* Now, we can close the channel safely */ | |
1096 | vmbus_close(device->channel); | |
1097 | ||
1098 | cleanup: | |
1099 | ||
4baab261 | 1100 | if (net_device) |
356c4657 | 1101 | kfree(net_device); |
b637e023 HZ |
1102 | |
1103 | return ret; | |
1104 | } |