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 | ||
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 */ | |
06b47aac | 196 | vfree(net_device->send_buf); |
c25aaf81 KS |
197 | net_device->send_buf = NULL; |
198 | } | |
199 | kfree(net_device->send_section_map); | |
200 | ||
ec91cd09 HZ |
201 | return ret; |
202 | } | |
203 | ||
c25aaf81 | 204 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 205 | { |
21a80820 | 206 | int ret = 0; |
35abb21a | 207 | int t; |
85799a37 HZ |
208 | struct netvsc_device *net_device; |
209 | struct nvsp_message *init_packet; | |
2ddd5e5f | 210 | struct net_device *ndev; |
fceaf24a | 211 | |
5a71ae30 | 212 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 213 | if (!net_device) |
927bc33c | 214 | return -ENODEV; |
2ddd5e5f | 215 | ndev = net_device->ndev; |
fceaf24a | 216 | |
b679ef73 | 217 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); |
53d21fdb | 218 | if (!net_device->recv_buf) { |
d9871158 | 219 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 220 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 221 | ret = -ENOMEM; |
0c3b7b2f | 222 | goto cleanup; |
fceaf24a | 223 | } |
fceaf24a | 224 | |
454f18a9 BP |
225 | /* |
226 | * Establish the gpadl handle for this buffer on this | |
227 | * channel. Note: This call uses the vmbus connection rather | |
228 | * than the channel to establish the gpadl handle. | |
229 | */ | |
53d21fdb HZ |
230 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
231 | net_device->recv_buf_size, | |
232 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 233 | if (ret != 0) { |
d9871158 | 234 | netdev_err(ndev, |
c909ebbd | 235 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 236 | goto cleanup; |
fceaf24a HJ |
237 | } |
238 | ||
fceaf24a | 239 | |
454f18a9 | 240 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 241 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 242 | |
85799a37 | 243 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 244 | |
53d21fdb HZ |
245 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
246 | init_packet->msg.v1_msg.send_recv_buf. | |
247 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
248 | init_packet->msg.v1_msg. | |
249 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 250 | |
454f18a9 | 251 | /* Send the gpadl notification request */ |
85799a37 | 252 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 253 | sizeof(struct nvsp_message), |
85799a37 | 254 | (unsigned long)init_packet, |
415f2287 | 255 | VM_PKT_DATA_INBAND, |
5a4df290 | 256 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 257 | if (ret != 0) { |
d9871158 | 258 | netdev_err(ndev, |
c909ebbd | 259 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 260 | goto cleanup; |
fceaf24a HJ |
261 | } |
262 | ||
5c5781b3 | 263 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 264 | BUG_ON(t == 0); |
0c3b7b2f | 265 | |
fceaf24a | 266 | |
454f18a9 | 267 | /* Check the response */ |
53d21fdb HZ |
268 | if (init_packet->msg.v1_msg. |
269 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 270 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 271 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
272 | init_packet->msg.v1_msg. |
273 | send_recv_buf_complete.status); | |
927bc33c | 274 | ret = -EINVAL; |
0c3b7b2f | 275 | goto cleanup; |
fceaf24a HJ |
276 | } |
277 | ||
454f18a9 | 278 | /* Parse the response */ |
fceaf24a | 279 | |
53d21fdb HZ |
280 | net_device->recv_section_cnt = init_packet->msg. |
281 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 282 | |
c1813200 HZ |
283 | net_device->recv_section = kmemdup( |
284 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
285 | net_device->recv_section_cnt * | |
286 | sizeof(struct nvsp_1_receive_buffer_section), | |
287 | GFP_KERNEL); | |
53d21fdb | 288 | if (net_device->recv_section == NULL) { |
927bc33c | 289 | ret = -EINVAL; |
0c3b7b2f | 290 | goto cleanup; |
fceaf24a HJ |
291 | } |
292 | ||
21a80820 GKH |
293 | /* |
294 | * For 1st release, there should only be 1 section that represents the | |
295 | * entire receive buffer | |
296 | */ | |
53d21fdb HZ |
297 | if (net_device->recv_section_cnt != 1 || |
298 | net_device->recv_section->offset != 0) { | |
927bc33c | 299 | ret = -EINVAL; |
0c3b7b2f | 300 | goto cleanup; |
fceaf24a HJ |
301 | } |
302 | ||
c25aaf81 KS |
303 | /* Now setup the send buffer. |
304 | */ | |
06b47aac | 305 | net_device->send_buf = vzalloc(net_device->send_buf_size); |
c25aaf81 KS |
306 | if (!net_device->send_buf) { |
307 | netdev_err(ndev, "unable to allocate send " | |
308 | "buffer of size %d\n", net_device->send_buf_size); | |
309 | ret = -ENOMEM; | |
310 | goto cleanup; | |
311 | } | |
312 | ||
313 | /* Establish the gpadl handle for this buffer on this | |
314 | * channel. Note: This call uses the vmbus connection rather | |
315 | * than the channel to establish the gpadl handle. | |
316 | */ | |
317 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
318 | net_device->send_buf_size, | |
319 | &net_device->send_buf_gpadl_handle); | |
320 | if (ret != 0) { | |
321 | netdev_err(ndev, | |
322 | "unable to establish send buffer's gpadl\n"); | |
323 | goto cleanup; | |
324 | } | |
325 | ||
326 | /* Notify the NetVsp of the gpadl handle */ | |
327 | init_packet = &net_device->channel_init_pkt; | |
328 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
329 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
330 | init_packet->msg.v1_msg.send_recv_buf.gpadl_handle = | |
331 | net_device->send_buf_gpadl_handle; | |
332 | init_packet->msg.v1_msg.send_recv_buf.id = 0; | |
333 | ||
334 | /* Send the gpadl notification request */ | |
335 | ret = vmbus_sendpacket(device->channel, init_packet, | |
336 | sizeof(struct nvsp_message), | |
337 | (unsigned long)init_packet, | |
338 | VM_PKT_DATA_INBAND, | |
339 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
340 | if (ret != 0) { | |
341 | netdev_err(ndev, | |
342 | "unable to send send buffer's gpadl to netvsp\n"); | |
343 | goto cleanup; | |
344 | } | |
345 | ||
346 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
347 | BUG_ON(t == 0); | |
348 | ||
349 | /* Check the response */ | |
350 | if (init_packet->msg.v1_msg. | |
351 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
352 | netdev_err(ndev, "Unable to complete send buffer " | |
353 | "initialization with NetVsp - status %d\n", | |
354 | init_packet->msg.v1_msg. | |
355 | send_recv_buf_complete.status); | |
356 | ret = -EINVAL; | |
357 | goto cleanup; | |
358 | } | |
359 | ||
360 | /* Parse the response */ | |
361 | net_device->send_section_size = init_packet->msg. | |
362 | v1_msg.send_send_buf_complete.section_size; | |
363 | ||
364 | /* Section count is simply the size divided by the section size. | |
365 | */ | |
366 | net_device->send_section_cnt = | |
367 | net_device->send_buf_size/net_device->send_section_size; | |
368 | ||
369 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
370 | net_device->send_section_size, net_device->send_section_cnt); | |
371 | ||
372 | /* Setup state for managing the send buffer. */ | |
373 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
374 | BITS_PER_LONG); | |
375 | ||
376 | net_device->send_section_map = | |
377 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
378 | if (net_device->send_section_map == NULL) { |
379 | ret = -ENOMEM; | |
c25aaf81 | 380 | goto cleanup; |
dd1d3f8f | 381 | } |
c25aaf81 | 382 | |
0c3b7b2f | 383 | goto exit; |
fceaf24a | 384 | |
0c3b7b2f | 385 | cleanup: |
c25aaf81 | 386 | netvsc_destroy_buf(net_device); |
fceaf24a | 387 | |
0c3b7b2f | 388 | exit: |
fceaf24a HJ |
389 | return ret; |
390 | } | |
391 | ||
fceaf24a | 392 | |
f157e78d HZ |
393 | /* Negotiate NVSP protocol version */ |
394 | static int negotiate_nvsp_ver(struct hv_device *device, | |
395 | struct netvsc_device *net_device, | |
396 | struct nvsp_message *init_packet, | |
397 | u32 nvsp_ver) | |
fceaf24a | 398 | { |
35abb21a | 399 | int ret, t; |
fceaf24a | 400 | |
85799a37 | 401 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 402 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
403 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
404 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 405 | |
454f18a9 | 406 | /* Send the init request */ |
85799a37 | 407 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 408 | sizeof(struct nvsp_message), |
85799a37 | 409 | (unsigned long)init_packet, |
415f2287 | 410 | VM_PKT_DATA_INBAND, |
5a4df290 | 411 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 412 | |
b8a3d52b | 413 | if (ret != 0) |
f157e78d | 414 | return ret; |
fceaf24a | 415 | |
5c5781b3 | 416 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 417 | |
f157e78d HZ |
418 | if (t == 0) |
419 | return -ETIMEDOUT; | |
fceaf24a | 420 | |
53d21fdb | 421 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
422 | NVSP_STAT_SUCCESS) |
423 | return -EINVAL; | |
fceaf24a | 424 | |
a1eabb01 | 425 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
426 | return 0; |
427 | ||
428 | /* NVSPv2 only: Send NDIS config */ | |
429 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
430 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d447c9a | 431 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu; |
1f5f3a75 | 432 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d HZ |
433 | |
434 | ret = vmbus_sendpacket(device->channel, init_packet, | |
435 | sizeof(struct nvsp_message), | |
436 | (unsigned long)init_packet, | |
437 | VM_PKT_DATA_INBAND, 0); | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
442 | static int netvsc_connect_vsp(struct hv_device *device) | |
443 | { | |
444 | int ret; | |
445 | struct netvsc_device *net_device; | |
446 | struct nvsp_message *init_packet; | |
447 | int ndis_version; | |
448 | struct net_device *ndev; | |
a1eabb01 HZ |
449 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
450 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
451 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
452 | |
453 | net_device = get_outbound_net_device(device); | |
454 | if (!net_device) | |
455 | return -ENODEV; | |
456 | ndev = net_device->ndev; | |
457 | ||
458 | init_packet = &net_device->channel_init_pkt; | |
459 | ||
460 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
461 | for (i = num_ver - 1; i >= 0; i--) |
462 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
463 | ver_list[i]) == 0) { | |
464 | net_device->nvsp_version = ver_list[i]; | |
465 | break; | |
466 | } | |
467 | ||
468 | if (i < 0) { | |
0f48c72c | 469 | ret = -EPROTO; |
0c3b7b2f | 470 | goto cleanup; |
fceaf24a | 471 | } |
f157e78d HZ |
472 | |
473 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
474 | ||
454f18a9 | 475 | /* Send the ndis version */ |
85799a37 | 476 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 477 | |
a1eabb01 | 478 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 479 | ndis_version = 0x00060001; |
a1eabb01 HZ |
480 | else |
481 | ndis_version = 0x0006001e; | |
fceaf24a | 482 | |
53d21fdb HZ |
483 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
484 | init_packet->msg.v1_msg. | |
485 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 486 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
487 | init_packet->msg.v1_msg. |
488 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 489 | ndis_version & 0xFFFF; |
fceaf24a | 490 | |
454f18a9 | 491 | /* Send the init request */ |
85799a37 | 492 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
493 | sizeof(struct nvsp_message), |
494 | (unsigned long)init_packet, | |
495 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 496 | if (ret != 0) |
0c3b7b2f | 497 | goto cleanup; |
454f18a9 BP |
498 | |
499 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
500 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
501 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
502 | else | |
503 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 504 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 505 | |
c25aaf81 | 506 | ret = netvsc_init_buf(device); |
fceaf24a | 507 | |
0c3b7b2f | 508 | cleanup: |
fceaf24a HJ |
509 | return ret; |
510 | } | |
511 | ||
648dc598 | 512 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 513 | { |
c25aaf81 | 514 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
515 | } |
516 | ||
3e189519 | 517 | /* |
5a71ae30 | 518 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 519 | */ |
905620d1 | 520 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 521 | { |
85799a37 | 522 | struct netvsc_device *net_device; |
c38b9c71 | 523 | unsigned long flags; |
fceaf24a | 524 | |
2ddd5e5f | 525 | net_device = hv_get_drvdata(device); |
fceaf24a | 526 | |
648dc598 | 527 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 528 | |
3852409b | 529 | /* |
9d88f33a S |
530 | * Since we have already drained, we don't need to busy wait |
531 | * as was done in final_release_stor_device() | |
532 | * Note that we cannot set the ext pointer to NULL until | |
533 | * we have drained - to drain the outgoing packets, we need to | |
534 | * allow incoming packets. | |
3852409b | 535 | */ |
9d88f33a S |
536 | |
537 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 538 | hv_set_drvdata(device, NULL); |
9d88f33a | 539 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 540 | |
86c921af S |
541 | /* |
542 | * At this point, no one should be accessing net_device | |
543 | * except in here | |
544 | */ | |
c909ebbd | 545 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 546 | |
454f18a9 | 547 | /* Now, we can close the channel safely */ |
85799a37 | 548 | vmbus_close(device->channel); |
fceaf24a | 549 | |
454f18a9 | 550 | /* Release all resources */ |
5b54dac8 HZ |
551 | if (net_device->sub_cb_buf) |
552 | vfree(net_device->sub_cb_buf); | |
553 | ||
356c4657 | 554 | kfree(net_device); |
21a80820 | 555 | return 0; |
fceaf24a HJ |
556 | } |
557 | ||
33be96e4 HZ |
558 | |
559 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
560 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
561 | ||
562 | /* | |
563 | * Get the percentage of available bytes to write in the ring. | |
564 | * The return value is in range from 0 to 100. | |
565 | */ | |
566 | static inline u32 hv_ringbuf_avail_percent( | |
567 | struct hv_ring_buffer_info *ring_info) | |
568 | { | |
569 | u32 avail_read, avail_write; | |
570 | ||
571 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
572 | ||
573 | return avail_write * 100 / ring_info->ring_datasize; | |
574 | } | |
575 | ||
c25aaf81 KS |
576 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
577 | u32 index) | |
578 | { | |
579 | sync_change_bit(index, net_device->send_section_map); | |
580 | } | |
581 | ||
97c1723a KS |
582 | static void netvsc_send_completion(struct netvsc_device *net_device, |
583 | struct hv_device *device, | |
85799a37 | 584 | struct vmpacket_descriptor *packet) |
fceaf24a | 585 | { |
85799a37 HZ |
586 | struct nvsp_message *nvsp_packet; |
587 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 588 | struct net_device *ndev; |
c25aaf81 | 589 | u32 send_index; |
fceaf24a | 590 | |
2ddd5e5f | 591 | ndev = net_device->ndev; |
fceaf24a | 592 | |
85799a37 | 593 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 594 | (packet->offset8 << 3)); |
fceaf24a | 595 | |
53d21fdb HZ |
596 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
597 | (nvsp_packet->hdr.msg_type == | |
598 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
599 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
600 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
601 | (nvsp_packet->hdr.msg_type == | |
602 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 603 | /* Copy the response back */ |
53d21fdb | 604 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 605 | sizeof(struct nvsp_message)); |
35abb21a | 606 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
607 | } else if (nvsp_packet->hdr.msg_type == |
608 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 609 | int num_outstanding_sends; |
5b54dac8 HZ |
610 | u16 q_idx = 0; |
611 | struct vmbus_channel *channel = device->channel; | |
612 | int queue_sends; | |
33be96e4 | 613 | |
454f18a9 | 614 | /* Get the send context */ |
85799a37 | 615 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 616 | packet->trans_id; |
fceaf24a | 617 | |
454f18a9 | 618 | /* Notify the layer above us */ |
5b54dac8 | 619 | if (nvsc_packet) { |
c25aaf81 KS |
620 | send_index = nvsc_packet->send_buf_index; |
621 | if (send_index != NETVSC_INVALID_INDEX) | |
622 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 HZ |
623 | q_idx = nvsc_packet->q_idx; |
624 | channel = nvsc_packet->channel; | |
893f6627 HZ |
625 | nvsc_packet->send_completion(nvsc_packet-> |
626 | send_completion_ctx); | |
5b54dac8 | 627 | } |
fceaf24a | 628 | |
33be96e4 HZ |
629 | num_outstanding_sends = |
630 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
631 | queue_sends = atomic_dec_return(&net_device-> |
632 | queue_sends[q_idx]); | |
1d06825b | 633 | |
dc5cd894 HZ |
634 | if (net_device->destroy && num_outstanding_sends == 0) |
635 | wake_up(&net_device->wait_drain); | |
636 | ||
5b54dac8 HZ |
637 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
638 | !net_device->start_remove && | |
639 | (hv_ringbuf_avail_percent(&channel->outbound) > | |
640 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
641 | netif_tx_wake_queue(netdev_get_tx_queue( | |
642 | ndev, q_idx)); | |
21a80820 | 643 | } else { |
d9871158 | 644 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 645 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
646 | } |
647 | ||
fceaf24a HJ |
648 | } |
649 | ||
c25aaf81 KS |
650 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
651 | { | |
652 | unsigned long index; | |
653 | u32 max_words = net_device->map_words; | |
654 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
655 | u32 section_cnt = net_device->send_section_cnt; | |
656 | int ret_val = NETVSC_INVALID_INDEX; | |
657 | int i; | |
658 | int prev_val; | |
659 | ||
660 | for (i = 0; i < max_words; i++) { | |
661 | if (!~(map_addr[i])) | |
662 | continue; | |
663 | index = ffz(map_addr[i]); | |
664 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
665 | if (prev_val) | |
666 | continue; | |
667 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
668 | break; | |
669 | ret_val = (index + (i * BITS_PER_LONG)); | |
670 | break; | |
671 | } | |
672 | return ret_val; | |
673 | } | |
674 | ||
675 | u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, | |
676 | unsigned int section_index, | |
677 | struct hv_netvsc_packet *packet) | |
678 | { | |
679 | char *start = net_device->send_buf; | |
680 | char *dest = (start + (section_index * net_device->send_section_size)); | |
681 | int i; | |
682 | u32 msg_size = 0; | |
683 | ||
684 | for (i = 0; i < packet->page_buf_cnt; i++) { | |
685 | char *src = phys_to_virt(packet->page_buf[i].pfn << PAGE_SHIFT); | |
686 | u32 offset = packet->page_buf[i].offset; | |
687 | u32 len = packet->page_buf[i].len; | |
688 | ||
689 | memcpy(dest, (src + offset), len); | |
690 | msg_size += len; | |
691 | dest += len; | |
692 | } | |
693 | return msg_size; | |
694 | } | |
695 | ||
f9819f05 | 696 | int netvsc_send(struct hv_device *device, |
85799a37 | 697 | struct hv_netvsc_packet *packet) |
fceaf24a | 698 | { |
85799a37 | 699 | struct netvsc_device *net_device; |
21a80820 | 700 | int ret = 0; |
223c1aa6 | 701 | struct nvsp_message sendMessage; |
2ddd5e5f | 702 | struct net_device *ndev; |
5b54dac8 | 703 | struct vmbus_channel *out_channel = NULL; |
f1ea3cd7 | 704 | u64 req_id; |
c25aaf81 KS |
705 | unsigned int section_index = NETVSC_INVALID_INDEX; |
706 | u32 msg_size = 0; | |
707 | struct sk_buff *skb; | |
708 | ||
fceaf24a | 709 | |
5a71ae30 | 710 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 711 | if (!net_device) |
ff2bd69a | 712 | return -ENODEV; |
2ddd5e5f | 713 | ndev = net_device->ndev; |
fceaf24a | 714 | |
53d21fdb | 715 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 716 | if (packet->is_data_pkt) { |
21a80820 | 717 | /* 0 is RMC_DATA; */ |
53d21fdb | 718 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
719 | } else { |
720 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 721 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 722 | } |
fceaf24a | 723 | |
c25aaf81 KS |
724 | /* Attempt to send via sendbuf */ |
725 | if (packet->total_data_buflen < net_device->send_section_size) { | |
726 | section_index = netvsc_get_next_send_section(net_device); | |
727 | if (section_index != NETVSC_INVALID_INDEX) { | |
728 | msg_size = netvsc_copy_to_send_buf(net_device, | |
729 | section_index, | |
730 | packet); | |
731 | skb = (struct sk_buff *) | |
732 | (unsigned long)packet->send_completion_tid; | |
733 | if (skb) | |
734 | dev_kfree_skb_any(skb); | |
735 | packet->page_buf_cnt = 0; | |
736 | } | |
737 | } | |
738 | packet->send_buf_index = section_index; | |
739 | ||
740 | ||
53d21fdb | 741 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
c25aaf81 KS |
742 | section_index; |
743 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = msg_size; | |
21a80820 | 744 | |
893f6627 | 745 | if (packet->send_completion) |
00ca8f0c | 746 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
747 | else |
748 | req_id = 0; | |
749 | ||
5b54dac8 HZ |
750 | out_channel = net_device->chn_table[packet->q_idx]; |
751 | if (out_channel == NULL) | |
752 | out_channel = device->channel; | |
753 | packet->channel = out_channel; | |
754 | ||
72a2f5bd | 755 | if (packet->page_buf_cnt) { |
5b54dac8 | 756 | ret = vmbus_sendpacket_pagebuffer(out_channel, |
72a2f5bd HZ |
757 | packet->page_buf, |
758 | packet->page_buf_cnt, | |
ff3f8eec GKH |
759 | &sendMessage, |
760 | sizeof(struct nvsp_message), | |
f1ea3cd7 | 761 | req_id); |
21a80820 | 762 | } else { |
5b54dac8 | 763 | ret = vmbus_sendpacket(out_channel, &sendMessage, |
e4d59ac5 | 764 | sizeof(struct nvsp_message), |
f1ea3cd7 | 765 | req_id, |
e4d59ac5 HZ |
766 | VM_PKT_DATA_INBAND, |
767 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
768 | } |
769 | ||
1d06825b HZ |
770 | if (ret == 0) { |
771 | atomic_inc(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
772 | atomic_inc(&net_device->queue_sends[packet->q_idx]); |
773 | ||
774 | if (hv_ringbuf_avail_percent(&out_channel->outbound) < | |
33be96e4 | 775 | RING_AVAIL_PERCENT_LOWATER) { |
5b54dac8 HZ |
776 | netif_tx_stop_queue(netdev_get_tx_queue( |
777 | ndev, packet->q_idx)); | |
778 | ||
33be96e4 | 779 | if (atomic_read(&net_device-> |
5b54dac8 HZ |
780 | queue_sends[packet->q_idx]) < 1) |
781 | netif_tx_wake_queue(netdev_get_tx_queue( | |
782 | ndev, packet->q_idx)); | |
33be96e4 | 783 | } |
1d06825b | 784 | } else if (ret == -EAGAIN) { |
5b54dac8 HZ |
785 | netif_tx_stop_queue(netdev_get_tx_queue( |
786 | ndev, packet->q_idx)); | |
787 | if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) { | |
788 | netif_tx_wake_queue(netdev_get_tx_queue( | |
789 | ndev, packet->q_idx)); | |
33be96e4 HZ |
790 | ret = -ENOSPC; |
791 | } | |
1d06825b | 792 | } else { |
d9871158 | 793 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 794 | packet, ret); |
1d06825b | 795 | } |
fceaf24a | 796 | |
fceaf24a HJ |
797 | return ret; |
798 | } | |
799 | ||
5fa9d3c5 | 800 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 801 | struct vmbus_channel *channel, |
97c1723a | 802 | struct netvsc_device *net_device, |
63f6921d | 803 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
804 | { |
805 | struct nvsp_message recvcompMessage; | |
806 | int retries = 0; | |
807 | int ret; | |
2ddd5e5f | 808 | struct net_device *ndev; |
2ddd5e5f S |
809 | |
810 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
811 | |
812 | recvcompMessage.hdr.msg_type = | |
813 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
814 | ||
63f6921d | 815 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
816 | |
817 | retry_send_cmplt: | |
818 | /* Send the completion */ | |
5b54dac8 | 819 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
820 | sizeof(struct nvsp_message), transaction_id, |
821 | VM_PKT_COMP, 0); | |
822 | if (ret == 0) { | |
823 | /* success */ | |
824 | /* no-op */ | |
d2598f01 | 825 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
826 | /* no more room...wait a bit and attempt to retry 3 times */ |
827 | retries++; | |
d9871158 | 828 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 829 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
830 | |
831 | if (retries < 4) { | |
832 | udelay(100); | |
833 | goto retry_send_cmplt; | |
834 | } else { | |
d9871158 | 835 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 836 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
837 | transaction_id); |
838 | } | |
839 | } else { | |
d9871158 | 840 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 841 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
842 | } |
843 | } | |
844 | ||
97c1723a | 845 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 846 | struct vmbus_channel *channel, |
97c1723a KS |
847 | struct hv_device *device, |
848 | struct vmpacket_descriptor *packet) | |
fceaf24a | 849 | { |
85799a37 HZ |
850 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
851 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
852 | struct hv_netvsc_packet nv_pkt; |
853 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
854 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
855 | int i; |
856 | int count = 0; | |
2ddd5e5f | 857 | struct net_device *ndev; |
779b4d17 | 858 | |
2ddd5e5f | 859 | ndev = net_device->ndev; |
fceaf24a | 860 | |
21a80820 GKH |
861 | /* |
862 | * All inbound packets other than send completion should be xfer page | |
863 | * packet | |
864 | */ | |
415f2287 | 865 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 866 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 867 | packet->type); |
fceaf24a HJ |
868 | return; |
869 | } | |
870 | ||
85799a37 | 871 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 872 | (packet->offset8 << 3)); |
fceaf24a | 873 | |
454f18a9 | 874 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
875 | if (nvsp_packet->hdr.msg_type != |
876 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 877 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 878 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
879 | return; |
880 | } | |
881 | ||
85799a37 | 882 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 883 | |
415f2287 | 884 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 885 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 886 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 887 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
888 | return; |
889 | } | |
890 | ||
4baab261 HZ |
891 | count = vmxferpage_packet->range_cnt; |
892 | netvsc_packet->device = device; | |
893 | netvsc_packet->channel = channel; | |
fceaf24a | 894 | |
454f18a9 | 895 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 896 | for (i = 0; i < count; i++) { |
454f18a9 | 897 | /* Initialize the netvsc packet */ |
63f6921d | 898 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
45326342 HZ |
899 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
900 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 901 | netvsc_packet->total_data_buflen = |
415f2287 | 902 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 903 | |
454f18a9 | 904 | /* Pass it to the upper layer */ |
ac6f7859 | 905 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 906 | |
4baab261 HZ |
907 | if (netvsc_packet->status != NVSP_STAT_SUCCESS) |
908 | status = NVSP_STAT_FAIL; | |
fceaf24a HJ |
909 | } |
910 | ||
4baab261 HZ |
911 | netvsc_send_recv_completion(device, channel, net_device, |
912 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
913 | } |
914 | ||
5b54dac8 HZ |
915 | |
916 | static void netvsc_send_table(struct hv_device *hdev, | |
917 | struct vmpacket_descriptor *vmpkt) | |
918 | { | |
919 | struct netvsc_device *nvscdev; | |
920 | struct net_device *ndev; | |
921 | struct nvsp_message *nvmsg; | |
922 | int i; | |
923 | u32 count, *tab; | |
924 | ||
925 | nvscdev = get_outbound_net_device(hdev); | |
926 | if (!nvscdev) | |
927 | return; | |
928 | ndev = nvscdev->ndev; | |
929 | ||
930 | nvmsg = (struct nvsp_message *)((unsigned long)vmpkt + | |
931 | (vmpkt->offset8 << 3)); | |
932 | ||
933 | if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE) | |
934 | return; | |
935 | ||
936 | count = nvmsg->msg.v5_msg.send_table.count; | |
937 | if (count != VRSS_SEND_TAB_SIZE) { | |
938 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
939 | return; | |
940 | } | |
941 | ||
942 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
943 | nvmsg->msg.v5_msg.send_table.offset); | |
944 | ||
945 | for (i = 0; i < count; i++) | |
946 | nvscdev->send_table[i] = tab[i]; | |
947 | } | |
948 | ||
949 | void netvsc_channel_cb(void *context) | |
fceaf24a | 950 | { |
21a80820 | 951 | int ret; |
5b54dac8 HZ |
952 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
953 | struct hv_device *device; | |
85799a37 HZ |
954 | struct netvsc_device *net_device; |
955 | u32 bytes_recvd; | |
956 | u64 request_id; | |
8dc0a06a | 957 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
958 | unsigned char *buffer; |
959 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 960 | struct net_device *ndev; |
fceaf24a | 961 | |
5b54dac8 HZ |
962 | if (channel->primary_channel != NULL) |
963 | device = channel->primary_channel->device_obj; | |
964 | else | |
965 | device = channel->device_obj; | |
966 | ||
5a71ae30 | 967 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 968 | if (!net_device) |
ee0c4c39 | 969 | return; |
2ddd5e5f | 970 | ndev = net_device->ndev; |
5b54dac8 | 971 | buffer = get_per_channel_state(channel); |
fceaf24a | 972 | |
21a80820 | 973 | do { |
5b54dac8 | 974 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 975 | &bytes_recvd, &request_id); |
21a80820 | 976 | if (ret == 0) { |
85799a37 | 977 | if (bytes_recvd > 0) { |
21a80820 | 978 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
979 | switch (desc->type) { |
980 | case VM_PKT_COMP: | |
97c1723a KS |
981 | netvsc_send_completion(net_device, |
982 | device, desc); | |
21a80820 GKH |
983 | break; |
984 | ||
415f2287 | 985 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
986 | netvsc_receive(net_device, channel, |
987 | device, desc); | |
988 | break; | |
989 | ||
990 | case VM_PKT_DATA_INBAND: | |
991 | netvsc_send_table(device, desc); | |
21a80820 GKH |
992 | break; |
993 | ||
994 | default: | |
d9871158 | 995 | netdev_err(ndev, |
21a80820 GKH |
996 | "unhandled packet type %d, " |
997 | "tid %llx len %d\n", | |
415f2287 | 998 | desc->type, request_id, |
85799a37 | 999 | bytes_recvd); |
21a80820 | 1000 | break; |
fceaf24a HJ |
1001 | } |
1002 | ||
21a80820 | 1003 | } else { |
ee0c4c39 KS |
1004 | /* |
1005 | * We are done for this pass. | |
1006 | */ | |
fceaf24a HJ |
1007 | break; |
1008 | } | |
ee0c4c39 | 1009 | |
3d5cad97 | 1010 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1011 | if (bufferlen > NETVSC_PACKET_SIZE) |
1012 | kfree(buffer); | |
21a80820 | 1013 | /* Handle large packet */ |
85799a37 | 1014 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1015 | if (buffer == NULL) { |
454f18a9 | 1016 | /* Try again next time around */ |
d9871158 | 1017 | netdev_err(ndev, |
21a80820 | 1018 | "unable to allocate buffer of size " |
c909ebbd | 1019 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1020 | break; |
1021 | } | |
1022 | ||
85799a37 | 1023 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1024 | } |
1025 | } while (1); | |
1026 | ||
ee0c4c39 KS |
1027 | if (bufferlen > NETVSC_PACKET_SIZE) |
1028 | kfree(buffer); | |
fceaf24a HJ |
1029 | return; |
1030 | } | |
af24ce42 | 1031 | |
b637e023 HZ |
1032 | /* |
1033 | * netvsc_device_add - Callback when the device belonging to this | |
1034 | * driver is added | |
1035 | */ | |
7bd23a4d | 1036 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1037 | { |
1038 | int ret = 0; | |
aae23986 S |
1039 | int ring_size = |
1040 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1041 | struct netvsc_device *net_device; |
2ddd5e5f | 1042 | struct net_device *ndev; |
b637e023 HZ |
1043 | |
1044 | net_device = alloc_net_device(device); | |
1045 | if (!net_device) { | |
ace163a8 | 1046 | ret = -ENOMEM; |
b637e023 HZ |
1047 | goto cleanup; |
1048 | } | |
1049 | ||
5b54dac8 HZ |
1050 | net_device->ring_size = ring_size; |
1051 | ||
2ddd5e5f S |
1052 | /* |
1053 | * Coming into this function, struct net_device * is | |
1054 | * registered as the driver private data. | |
1055 | * In alloc_net_device(), we register struct netvsc_device * | |
1056 | * as the driver private data and stash away struct net_device * | |
1057 | * in struct netvsc_device *. | |
1058 | */ | |
1059 | ndev = net_device->ndev; | |
1060 | ||
b637e023 | 1061 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1062 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1063 | |
5b54dac8 HZ |
1064 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1065 | ||
b637e023 | 1066 | /* Open the channel */ |
aae23986 S |
1067 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1068 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1069 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1070 | |
1071 | if (ret != 0) { | |
d9871158 | 1072 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1073 | goto cleanup; |
1074 | } | |
1075 | ||
1076 | /* Channel is opened */ | |
c909ebbd | 1077 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1078 | |
5b54dac8 HZ |
1079 | net_device->chn_table[0] = device->channel; |
1080 | ||
b637e023 HZ |
1081 | /* Connect with the NetVsp */ |
1082 | ret = netvsc_connect_vsp(device); | |
1083 | if (ret != 0) { | |
d9871158 | 1084 | netdev_err(ndev, |
c909ebbd | 1085 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1086 | goto close; |
1087 | } | |
1088 | ||
1089 | return ret; | |
1090 | ||
1091 | close: | |
1092 | /* Now, we can close the channel safely */ | |
1093 | vmbus_close(device->channel); | |
1094 | ||
1095 | cleanup: | |
bd4578bc | 1096 | kfree(net_device); |
b637e023 HZ |
1097 | |
1098 | return ret; | |
1099 | } |