]>
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> |
d6472302 | 31 | #include <linux/vmalloc.h> |
c25aaf81 | 32 | #include <asm/sync_bitops.h> |
3f335ea2 | 33 | |
5ca7252a | 34 | #include "hyperv_net.h" |
fceaf24a | 35 | |
84bf9cef KS |
36 | /* |
37 | * Switch the data path from the synthetic interface to the VF | |
38 | * interface. | |
39 | */ | |
40 | void netvsc_switch_datapath(struct netvsc_device *nv_dev, bool vf) | |
41 | { | |
42 | struct nvsp_message *init_pkt = &nv_dev->channel_init_pkt; | |
43 | struct hv_device *dev = nv_dev->dev; | |
44 | ||
45 | memset(init_pkt, 0, sizeof(struct nvsp_message)); | |
46 | init_pkt->hdr.msg_type = NVSP_MSG4_TYPE_SWITCH_DATA_PATH; | |
47 | if (vf) | |
48 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
49 | NVSP_DATAPATH_VF; | |
50 | else | |
51 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
52 | NVSP_DATAPATH_SYNTHETIC; | |
53 | ||
54 | vmbus_sendpacket(dev->channel, init_pkt, | |
55 | sizeof(struct nvsp_message), | |
56 | (unsigned long)init_pkt, | |
57 | VM_PKT_DATA_INBAND, 0); | |
58 | } | |
59 | ||
fceaf24a | 60 | |
5a71ae30 | 61 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 62 | { |
85799a37 | 63 | struct netvsc_device *net_device; |
2ddd5e5f | 64 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 65 | |
85799a37 HZ |
66 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
67 | if (!net_device) | |
fceaf24a HJ |
68 | return NULL; |
69 | ||
f90251c8 HZ |
70 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
71 | if (!net_device->cb_buffer) { | |
72 | kfree(net_device); | |
73 | return NULL; | |
74 | } | |
75 | ||
dc5cd894 | 76 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 77 | net_device->destroy = false; |
84bf9cef KS |
78 | atomic_set(&net_device->open_cnt, 0); |
79 | atomic_set(&net_device->vf_use_cnt, 0); | |
53d21fdb | 80 | net_device->dev = device; |
2ddd5e5f | 81 | net_device->ndev = ndev; |
7c3877f2 HZ |
82 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
83 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
84 | ||
84bf9cef KS |
85 | net_device->vf_netdev = NULL; |
86 | net_device->vf_inject = false; | |
87 | ||
2ddd5e5f | 88 | hv_set_drvdata(device, net_device); |
85799a37 | 89 | return net_device; |
fceaf24a HJ |
90 | } |
91 | ||
f90251c8 HZ |
92 | static void free_netvsc_device(struct netvsc_device *nvdev) |
93 | { | |
94 | kfree(nvdev->cb_buffer); | |
95 | kfree(nvdev); | |
96 | } | |
97 | ||
5a71ae30 | 98 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 99 | { |
85799a37 | 100 | struct netvsc_device *net_device; |
fceaf24a | 101 | |
2ddd5e5f | 102 | net_device = hv_get_drvdata(device); |
9d88f33a | 103 | if (net_device && net_device->destroy) |
85799a37 | 104 | net_device = NULL; |
fceaf24a | 105 | |
85799a37 | 106 | return net_device; |
fceaf24a HJ |
107 | } |
108 | ||
5a71ae30 | 109 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 110 | { |
85799a37 | 111 | struct netvsc_device *net_device; |
fceaf24a | 112 | |
2ddd5e5f | 113 | net_device = hv_get_drvdata(device); |
9d88f33a S |
114 | |
115 | if (!net_device) | |
116 | goto get_in_err; | |
117 | ||
118 | if (net_device->destroy && | |
119 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 120 | net_device = NULL; |
fceaf24a | 121 | |
9d88f33a | 122 | get_in_err: |
85799a37 | 123 | return net_device; |
fceaf24a HJ |
124 | } |
125 | ||
fceaf24a | 126 | |
c25aaf81 | 127 | static int netvsc_destroy_buf(struct netvsc_device *net_device) |
ec91cd09 HZ |
128 | { |
129 | struct nvsp_message *revoke_packet; | |
130 | int ret = 0; | |
2ddd5e5f | 131 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
132 | |
133 | /* | |
134 | * If we got a section count, it means we received a | |
135 | * SendReceiveBufferComplete msg (ie sent | |
136 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
137 | * to send a revoke msg here | |
138 | */ | |
139 | if (net_device->recv_section_cnt) { | |
140 | /* Send the revoke receive buffer */ | |
141 | revoke_packet = &net_device->revoke_packet; | |
142 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
143 | ||
144 | revoke_packet->hdr.msg_type = | |
145 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
146 | revoke_packet->msg.v1_msg. | |
147 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
148 | ||
149 | ret = vmbus_sendpacket(net_device->dev->channel, | |
150 | revoke_packet, | |
151 | sizeof(struct nvsp_message), | |
152 | (unsigned long)revoke_packet, | |
153 | VM_PKT_DATA_INBAND, 0); | |
154 | /* | |
155 | * If we failed here, we might as well return and | |
156 | * have a leak rather than continue and a bugchk | |
157 | */ | |
158 | if (ret != 0) { | |
d9871158 | 159 | netdev_err(ndev, "unable to send " |
c909ebbd | 160 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 161 | return ret; |
ec91cd09 HZ |
162 | } |
163 | } | |
164 | ||
165 | /* Teardown the gpadl on the vsp end */ | |
166 | if (net_device->recv_buf_gpadl_handle) { | |
167 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
168 | net_device->recv_buf_gpadl_handle); | |
169 | ||
170 | /* If we failed here, we might as well return and have a leak | |
171 | * rather than continue and a bugchk | |
172 | */ | |
173 | if (ret != 0) { | |
d9871158 | 174 | netdev_err(ndev, |
c909ebbd | 175 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 176 | return ret; |
ec91cd09 HZ |
177 | } |
178 | net_device->recv_buf_gpadl_handle = 0; | |
179 | } | |
180 | ||
181 | if (net_device->recv_buf) { | |
182 | /* Free up the receive buffer */ | |
b679ef73 | 183 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
184 | net_device->recv_buf = NULL; |
185 | } | |
186 | ||
187 | if (net_device->recv_section) { | |
188 | net_device->recv_section_cnt = 0; | |
189 | kfree(net_device->recv_section); | |
190 | net_device->recv_section = NULL; | |
191 | } | |
192 | ||
c25aaf81 KS |
193 | /* Deal with the send buffer we may have setup. |
194 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
195 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
196 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
197 | * to send a revoke msg here |
198 | */ | |
199 | if (net_device->send_section_size) { | |
200 | /* Send the revoke receive buffer */ | |
201 | revoke_packet = &net_device->revoke_packet; | |
202 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
203 | ||
204 | revoke_packet->hdr.msg_type = | |
205 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
206 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
207 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 KS |
208 | |
209 | ret = vmbus_sendpacket(net_device->dev->channel, | |
210 | revoke_packet, | |
211 | sizeof(struct nvsp_message), | |
212 | (unsigned long)revoke_packet, | |
213 | VM_PKT_DATA_INBAND, 0); | |
214 | /* If we failed here, we might as well return and | |
215 | * have a leak rather than continue and a bugchk | |
216 | */ | |
217 | if (ret != 0) { | |
218 | netdev_err(ndev, "unable to send " | |
219 | "revoke send buffer to netvsp\n"); | |
220 | return ret; | |
221 | } | |
222 | } | |
223 | /* Teardown the gpadl on the vsp end */ | |
224 | if (net_device->send_buf_gpadl_handle) { | |
225 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
226 | net_device->send_buf_gpadl_handle); | |
227 | ||
228 | /* If we failed here, we might as well return and have a leak | |
229 | * rather than continue and a bugchk | |
230 | */ | |
231 | if (ret != 0) { | |
232 | netdev_err(ndev, | |
233 | "unable to teardown send buffer's gpadl\n"); | |
234 | return ret; | |
235 | } | |
2f18423d | 236 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
237 | } |
238 | if (net_device->send_buf) { | |
c51ed182 | 239 | /* Free up the send buffer */ |
06b47aac | 240 | vfree(net_device->send_buf); |
c25aaf81 KS |
241 | net_device->send_buf = NULL; |
242 | } | |
243 | kfree(net_device->send_section_map); | |
244 | ||
ec91cd09 HZ |
245 | return ret; |
246 | } | |
247 | ||
c25aaf81 | 248 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 249 | { |
21a80820 | 250 | int ret = 0; |
7390fe9c | 251 | unsigned long t; |
85799a37 HZ |
252 | struct netvsc_device *net_device; |
253 | struct nvsp_message *init_packet; | |
2ddd5e5f | 254 | struct net_device *ndev; |
0a726c2b | 255 | int node; |
fceaf24a | 256 | |
5a71ae30 | 257 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 258 | if (!net_device) |
927bc33c | 259 | return -ENODEV; |
2ddd5e5f | 260 | ndev = net_device->ndev; |
fceaf24a | 261 | |
0a726c2b S |
262 | node = cpu_to_node(device->channel->target_cpu); |
263 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
264 | if (!net_device->recv_buf) | |
265 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
266 | ||
53d21fdb | 267 | if (!net_device->recv_buf) { |
d9871158 | 268 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 269 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 270 | ret = -ENOMEM; |
0c3b7b2f | 271 | goto cleanup; |
fceaf24a | 272 | } |
fceaf24a | 273 | |
454f18a9 BP |
274 | /* |
275 | * Establish the gpadl handle for this buffer on this | |
276 | * channel. Note: This call uses the vmbus connection rather | |
277 | * than the channel to establish the gpadl handle. | |
278 | */ | |
53d21fdb HZ |
279 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
280 | net_device->recv_buf_size, | |
281 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 282 | if (ret != 0) { |
d9871158 | 283 | netdev_err(ndev, |
c909ebbd | 284 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 285 | goto cleanup; |
fceaf24a HJ |
286 | } |
287 | ||
fceaf24a | 288 | |
454f18a9 | 289 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 290 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 291 | |
85799a37 | 292 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 293 | |
53d21fdb HZ |
294 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
295 | init_packet->msg.v1_msg.send_recv_buf. | |
296 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
297 | init_packet->msg.v1_msg. | |
298 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 299 | |
454f18a9 | 300 | /* Send the gpadl notification request */ |
85799a37 | 301 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 302 | sizeof(struct nvsp_message), |
85799a37 | 303 | (unsigned long)init_packet, |
415f2287 | 304 | VM_PKT_DATA_INBAND, |
5a4df290 | 305 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 306 | if (ret != 0) { |
d9871158 | 307 | netdev_err(ndev, |
c909ebbd | 308 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 309 | goto cleanup; |
fceaf24a HJ |
310 | } |
311 | ||
5c5781b3 | 312 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 313 | BUG_ON(t == 0); |
0c3b7b2f | 314 | |
fceaf24a | 315 | |
454f18a9 | 316 | /* Check the response */ |
53d21fdb HZ |
317 | if (init_packet->msg.v1_msg. |
318 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 319 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 320 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
321 | init_packet->msg.v1_msg. |
322 | send_recv_buf_complete.status); | |
927bc33c | 323 | ret = -EINVAL; |
0c3b7b2f | 324 | goto cleanup; |
fceaf24a HJ |
325 | } |
326 | ||
454f18a9 | 327 | /* Parse the response */ |
fceaf24a | 328 | |
53d21fdb HZ |
329 | net_device->recv_section_cnt = init_packet->msg. |
330 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 331 | |
c1813200 HZ |
332 | net_device->recv_section = kmemdup( |
333 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
334 | net_device->recv_section_cnt * | |
335 | sizeof(struct nvsp_1_receive_buffer_section), | |
336 | GFP_KERNEL); | |
53d21fdb | 337 | if (net_device->recv_section == NULL) { |
927bc33c | 338 | ret = -EINVAL; |
0c3b7b2f | 339 | goto cleanup; |
fceaf24a HJ |
340 | } |
341 | ||
21a80820 GKH |
342 | /* |
343 | * For 1st release, there should only be 1 section that represents the | |
344 | * entire receive buffer | |
345 | */ | |
53d21fdb HZ |
346 | if (net_device->recv_section_cnt != 1 || |
347 | net_device->recv_section->offset != 0) { | |
927bc33c | 348 | ret = -EINVAL; |
0c3b7b2f | 349 | goto cleanup; |
fceaf24a HJ |
350 | } |
351 | ||
c25aaf81 KS |
352 | /* Now setup the send buffer. |
353 | */ | |
5defde59 S |
354 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
355 | if (!net_device->send_buf) | |
356 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
357 | if (!net_device->send_buf) { |
358 | netdev_err(ndev, "unable to allocate send " | |
359 | "buffer of size %d\n", net_device->send_buf_size); | |
360 | ret = -ENOMEM; | |
361 | goto cleanup; | |
362 | } | |
363 | ||
364 | /* Establish the gpadl handle for this buffer on this | |
365 | * channel. Note: This call uses the vmbus connection rather | |
366 | * than the channel to establish the gpadl handle. | |
367 | */ | |
368 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
369 | net_device->send_buf_size, | |
370 | &net_device->send_buf_gpadl_handle); | |
371 | if (ret != 0) { | |
372 | netdev_err(ndev, | |
373 | "unable to establish send buffer's gpadl\n"); | |
374 | goto cleanup; | |
375 | } | |
376 | ||
377 | /* Notify the NetVsp of the gpadl handle */ | |
378 | init_packet = &net_device->channel_init_pkt; | |
379 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
380 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 381 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 382 | net_device->send_buf_gpadl_handle; |
c51ed182 | 383 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
384 | |
385 | /* Send the gpadl notification request */ | |
386 | ret = vmbus_sendpacket(device->channel, init_packet, | |
387 | sizeof(struct nvsp_message), | |
388 | (unsigned long)init_packet, | |
389 | VM_PKT_DATA_INBAND, | |
390 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
391 | if (ret != 0) { | |
392 | netdev_err(ndev, | |
393 | "unable to send send buffer's gpadl to netvsp\n"); | |
394 | goto cleanup; | |
395 | } | |
396 | ||
397 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
398 | BUG_ON(t == 0); | |
399 | ||
400 | /* Check the response */ | |
401 | if (init_packet->msg.v1_msg. | |
402 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
403 | netdev_err(ndev, "Unable to complete send buffer " | |
404 | "initialization with NetVsp - status %d\n", | |
405 | init_packet->msg.v1_msg. | |
c51ed182 | 406 | send_send_buf_complete.status); |
c25aaf81 KS |
407 | ret = -EINVAL; |
408 | goto cleanup; | |
409 | } | |
410 | ||
411 | /* Parse the response */ | |
412 | net_device->send_section_size = init_packet->msg. | |
413 | v1_msg.send_send_buf_complete.section_size; | |
414 | ||
415 | /* Section count is simply the size divided by the section size. | |
416 | */ | |
417 | net_device->send_section_cnt = | |
418 | net_device->send_buf_size/net_device->send_section_size; | |
419 | ||
420 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
421 | net_device->send_section_size, net_device->send_section_cnt); | |
422 | ||
423 | /* Setup state for managing the send buffer. */ | |
424 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
425 | BITS_PER_LONG); | |
426 | ||
427 | net_device->send_section_map = | |
428 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
429 | if (net_device->send_section_map == NULL) { |
430 | ret = -ENOMEM; | |
c25aaf81 | 431 | goto cleanup; |
dd1d3f8f | 432 | } |
c25aaf81 | 433 | |
0c3b7b2f | 434 | goto exit; |
fceaf24a | 435 | |
0c3b7b2f | 436 | cleanup: |
c25aaf81 | 437 | netvsc_destroy_buf(net_device); |
fceaf24a | 438 | |
0c3b7b2f | 439 | exit: |
fceaf24a HJ |
440 | return ret; |
441 | } | |
442 | ||
fceaf24a | 443 | |
f157e78d HZ |
444 | /* Negotiate NVSP protocol version */ |
445 | static int negotiate_nvsp_ver(struct hv_device *device, | |
446 | struct netvsc_device *net_device, | |
447 | struct nvsp_message *init_packet, | |
448 | u32 nvsp_ver) | |
fceaf24a | 449 | { |
7390fe9c NMG |
450 | int ret; |
451 | unsigned long t; | |
fceaf24a | 452 | |
85799a37 | 453 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 454 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
455 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
456 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 457 | |
454f18a9 | 458 | /* Send the init request */ |
85799a37 | 459 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 460 | sizeof(struct nvsp_message), |
85799a37 | 461 | (unsigned long)init_packet, |
415f2287 | 462 | VM_PKT_DATA_INBAND, |
5a4df290 | 463 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 464 | |
b8a3d52b | 465 | if (ret != 0) |
f157e78d | 466 | return ret; |
fceaf24a | 467 | |
5c5781b3 | 468 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 469 | |
f157e78d HZ |
470 | if (t == 0) |
471 | return -ETIMEDOUT; | |
fceaf24a | 472 | |
53d21fdb | 473 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
474 | NVSP_STAT_SUCCESS) |
475 | return -EINVAL; | |
fceaf24a | 476 | |
a1eabb01 | 477 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
478 | return 0; |
479 | ||
71790a27 | 480 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
481 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
482 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d3c9d37 HZ |
483 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu + |
484 | ETH_HLEN; | |
1f5f3a75 | 485 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 486 | |
71790a27 HZ |
487 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) |
488 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; | |
489 | ||
f157e78d HZ |
490 | ret = vmbus_sendpacket(device->channel, init_packet, |
491 | sizeof(struct nvsp_message), | |
492 | (unsigned long)init_packet, | |
493 | VM_PKT_DATA_INBAND, 0); | |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
498 | static int netvsc_connect_vsp(struct hv_device *device) | |
499 | { | |
500 | int ret; | |
501 | struct netvsc_device *net_device; | |
502 | struct nvsp_message *init_packet; | |
503 | int ndis_version; | |
504 | struct net_device *ndev; | |
a1eabb01 HZ |
505 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
506 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
507 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
508 | |
509 | net_device = get_outbound_net_device(device); | |
510 | if (!net_device) | |
511 | return -ENODEV; | |
512 | ndev = net_device->ndev; | |
513 | ||
514 | init_packet = &net_device->channel_init_pkt; | |
515 | ||
516 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
517 | for (i = num_ver - 1; i >= 0; i--) |
518 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
519 | ver_list[i]) == 0) { | |
520 | net_device->nvsp_version = ver_list[i]; | |
521 | break; | |
522 | } | |
523 | ||
524 | if (i < 0) { | |
0f48c72c | 525 | ret = -EPROTO; |
0c3b7b2f | 526 | goto cleanup; |
fceaf24a | 527 | } |
f157e78d HZ |
528 | |
529 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
530 | ||
454f18a9 | 531 | /* Send the ndis version */ |
85799a37 | 532 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 533 | |
a1eabb01 | 534 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 535 | ndis_version = 0x00060001; |
a1eabb01 HZ |
536 | else |
537 | ndis_version = 0x0006001e; | |
fceaf24a | 538 | |
53d21fdb HZ |
539 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
540 | init_packet->msg.v1_msg. | |
541 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 542 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
543 | init_packet->msg.v1_msg. |
544 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 545 | ndis_version & 0xFFFF; |
fceaf24a | 546 | |
454f18a9 | 547 | /* Send the init request */ |
85799a37 | 548 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
549 | sizeof(struct nvsp_message), |
550 | (unsigned long)init_packet, | |
551 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 552 | if (ret != 0) |
0c3b7b2f | 553 | goto cleanup; |
454f18a9 BP |
554 | |
555 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
556 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
557 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
558 | else | |
559 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 560 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 561 | |
c25aaf81 | 562 | ret = netvsc_init_buf(device); |
fceaf24a | 563 | |
0c3b7b2f | 564 | cleanup: |
fceaf24a HJ |
565 | return ret; |
566 | } | |
567 | ||
648dc598 | 568 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 569 | { |
c25aaf81 | 570 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
571 | } |
572 | ||
3e189519 | 573 | /* |
5a71ae30 | 574 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 575 | */ |
905620d1 | 576 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 577 | { |
85799a37 | 578 | struct netvsc_device *net_device; |
c38b9c71 | 579 | unsigned long flags; |
fceaf24a | 580 | |
2ddd5e5f | 581 | net_device = hv_get_drvdata(device); |
fceaf24a | 582 | |
648dc598 | 583 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 584 | |
3852409b | 585 | /* |
9d88f33a S |
586 | * Since we have already drained, we don't need to busy wait |
587 | * as was done in final_release_stor_device() | |
588 | * Note that we cannot set the ext pointer to NULL until | |
589 | * we have drained - to drain the outgoing packets, we need to | |
590 | * allow incoming packets. | |
3852409b | 591 | */ |
9d88f33a S |
592 | |
593 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 594 | hv_set_drvdata(device, NULL); |
9d88f33a | 595 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 596 | |
86c921af S |
597 | /* |
598 | * At this point, no one should be accessing net_device | |
599 | * except in here | |
600 | */ | |
c909ebbd | 601 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 602 | |
454f18a9 | 603 | /* Now, we can close the channel safely */ |
85799a37 | 604 | vmbus_close(device->channel); |
fceaf24a | 605 | |
454f18a9 | 606 | /* Release all resources */ |
aa99c479 | 607 | vfree(net_device->sub_cb_buf); |
f90251c8 | 608 | free_netvsc_device(net_device); |
21a80820 | 609 | return 0; |
fceaf24a HJ |
610 | } |
611 | ||
33be96e4 HZ |
612 | |
613 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
614 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
615 | ||
616 | /* | |
617 | * Get the percentage of available bytes to write in the ring. | |
618 | * The return value is in range from 0 to 100. | |
619 | */ | |
620 | static inline u32 hv_ringbuf_avail_percent( | |
621 | struct hv_ring_buffer_info *ring_info) | |
622 | { | |
623 | u32 avail_read, avail_write; | |
624 | ||
625 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
626 | ||
627 | return avail_write * 100 / ring_info->ring_datasize; | |
628 | } | |
629 | ||
c25aaf81 KS |
630 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
631 | u32 index) | |
632 | { | |
633 | sync_change_bit(index, net_device->send_section_map); | |
634 | } | |
635 | ||
97c1723a | 636 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 637 | struct vmbus_channel *incoming_channel, |
97c1723a | 638 | struct hv_device *device, |
85799a37 | 639 | struct vmpacket_descriptor *packet) |
fceaf24a | 640 | { |
85799a37 HZ |
641 | struct nvsp_message *nvsp_packet; |
642 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 643 | struct net_device *ndev; |
c25aaf81 | 644 | u32 send_index; |
3a3d9a0a | 645 | struct sk_buff *skb; |
fceaf24a | 646 | |
2ddd5e5f | 647 | ndev = net_device->ndev; |
fceaf24a | 648 | |
85799a37 | 649 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 650 | (packet->offset8 << 3)); |
fceaf24a | 651 | |
53d21fdb HZ |
652 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
653 | (nvsp_packet->hdr.msg_type == | |
654 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
655 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
656 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
657 | (nvsp_packet->hdr.msg_type == | |
658 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 659 | /* Copy the response back */ |
53d21fdb | 660 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 661 | sizeof(struct nvsp_message)); |
35abb21a | 662 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
663 | } else if (nvsp_packet->hdr.msg_type == |
664 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 665 | int num_outstanding_sends; |
5b54dac8 HZ |
666 | u16 q_idx = 0; |
667 | struct vmbus_channel *channel = device->channel; | |
668 | int queue_sends; | |
33be96e4 | 669 | |
454f18a9 | 670 | /* Get the send context */ |
3a3d9a0a | 671 | skb = (struct sk_buff *)(unsigned long)packet->trans_id; |
fceaf24a | 672 | |
454f18a9 | 673 | /* Notify the layer above us */ |
3a3d9a0a KS |
674 | if (skb) { |
675 | nvsc_packet = (struct hv_netvsc_packet *) skb->cb; | |
c25aaf81 KS |
676 | send_index = nvsc_packet->send_buf_index; |
677 | if (send_index != NETVSC_INVALID_INDEX) | |
678 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 | 679 | q_idx = nvsc_packet->q_idx; |
25b85ee8 | 680 | channel = incoming_channel; |
3a3d9a0a | 681 | dev_kfree_skb_any(skb); |
5b54dac8 | 682 | } |
fceaf24a | 683 | |
33be96e4 HZ |
684 | num_outstanding_sends = |
685 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
686 | queue_sends = atomic_dec_return(&net_device-> |
687 | queue_sends[q_idx]); | |
1d06825b | 688 | |
dc5cd894 HZ |
689 | if (net_device->destroy && num_outstanding_sends == 0) |
690 | wake_up(&net_device->wait_drain); | |
691 | ||
5b54dac8 | 692 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
f580aec4 | 693 | !net_device->nd_ctx->start_remove && |
5b54dac8 HZ |
694 | (hv_ringbuf_avail_percent(&channel->outbound) > |
695 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
696 | netif_tx_wake_queue(netdev_get_tx_queue( | |
697 | ndev, q_idx)); | |
21a80820 | 698 | } else { |
d9871158 | 699 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 700 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
701 | } |
702 | ||
fceaf24a HJ |
703 | } |
704 | ||
c25aaf81 KS |
705 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
706 | { | |
707 | unsigned long index; | |
708 | u32 max_words = net_device->map_words; | |
709 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
710 | u32 section_cnt = net_device->send_section_cnt; | |
711 | int ret_val = NETVSC_INVALID_INDEX; | |
712 | int i; | |
713 | int prev_val; | |
714 | ||
715 | for (i = 0; i < max_words; i++) { | |
716 | if (!~(map_addr[i])) | |
717 | continue; | |
718 | index = ffz(map_addr[i]); | |
719 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
720 | if (prev_val) | |
721 | continue; | |
722 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
723 | break; | |
724 | ret_val = (index + (i * BITS_PER_LONG)); | |
725 | break; | |
726 | } | |
727 | return ret_val; | |
728 | } | |
729 | ||
da19fcd0 LP |
730 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
731 | unsigned int section_index, | |
7c3877f2 | 732 | u32 pend_size, |
24476760 | 733 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 734 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
735 | struct hv_page_buffer **pb, |
736 | struct sk_buff *skb) | |
c25aaf81 KS |
737 | { |
738 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
739 | char *dest = start + (section_index * net_device->send_section_size) |
740 | + pend_size; | |
c25aaf81 | 741 | int i; |
694a9fb0 | 742 | bool is_data_pkt = (skb != NULL) ? true : false; |
bde79be5 | 743 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 744 | u32 msg_size = 0; |
7c3877f2 HZ |
745 | u32 padding = 0; |
746 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
747 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
748 | packet->page_buf_cnt; | |
7c3877f2 HZ |
749 | |
750 | /* Add padding */ | |
bde79be5 | 751 | if (is_data_pkt && xmit_more && remain && |
aa0a34be | 752 | !packet->cp_partial) { |
7c3877f2 | 753 | padding = net_device->pkt_align - remain; |
24476760 | 754 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
755 | packet->total_data_buflen += padding; |
756 | } | |
c25aaf81 | 757 | |
aa0a34be | 758 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
759 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
760 | u32 offset = (*pb)[i].offset; | |
761 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
762 | |
763 | memcpy(dest, (src + offset), len); | |
764 | msg_size += len; | |
765 | dest += len; | |
766 | } | |
7c3877f2 HZ |
767 | |
768 | if (padding) { | |
769 | memset(dest, 0, padding); | |
770 | msg_size += padding; | |
771 | } | |
772 | ||
c25aaf81 KS |
773 | return msg_size; |
774 | } | |
775 | ||
7c3877f2 HZ |
776 | static inline int netvsc_send_pkt( |
777 | struct hv_netvsc_packet *packet, | |
a9f2e2d6 | 778 | struct netvsc_device *net_device, |
3a3d9a0a KS |
779 | struct hv_page_buffer **pb, |
780 | struct sk_buff *skb) | |
fceaf24a | 781 | { |
7c3877f2 | 782 | struct nvsp_message nvmsg; |
3a67c9cc | 783 | u16 q_idx = packet->q_idx; |
8b9fbe1a | 784 | struct vmbus_channel *out_channel = net_device->chn_table[q_idx]; |
7c3877f2 HZ |
785 | struct net_device *ndev = net_device->ndev; |
786 | u64 req_id; | |
787 | int ret; | |
aa0a34be | 788 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 789 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
bde79be5 | 790 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 791 | |
7c3877f2 | 792 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 793 | if (skb != NULL) { |
21a80820 | 794 | /* 0 is RMC_DATA; */ |
7c3877f2 | 795 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
796 | } else { |
797 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 798 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 799 | } |
fceaf24a | 800 | |
7c3877f2 HZ |
801 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
802 | packet->send_buf_index; | |
803 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
804 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
805 | else | |
806 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
807 | packet->total_data_buflen; | |
21a80820 | 808 | |
3a3d9a0a | 809 | req_id = (ulong)skb; |
f1ea3cd7 | 810 | |
c3582a2c HZ |
811 | if (out_channel->rescind) |
812 | return -ENODEV; | |
813 | ||
82fa3c77 KS |
814 | /* |
815 | * It is possible that once we successfully place this packet | |
816 | * on the ringbuffer, we may stop the queue. In that case, we want | |
817 | * to notify the host independent of the xmit_more flag. We don't | |
818 | * need to be precise here; in the worst case we may signal the host | |
819 | * unnecessarily. | |
820 | */ | |
821 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) | |
bde79be5 | 822 | xmit_more = false; |
82fa3c77 | 823 | |
72a2f5bd | 824 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
825 | pgbuf = packet->cp_partial ? (*pb) + |
826 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
827 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
828 | pgbuf, | |
829 | packet->page_buf_cnt, | |
830 | &nvmsg, | |
831 | sizeof(struct nvsp_message), | |
832 | req_id, | |
833 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 834 | !xmit_more); |
21a80820 | 835 | } else { |
82fa3c77 KS |
836 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
837 | sizeof(struct nvsp_message), | |
838 | req_id, | |
839 | VM_PKT_DATA_INBAND, | |
840 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 841 | !xmit_more); |
fceaf24a HJ |
842 | } |
843 | ||
1d06825b HZ |
844 | if (ret == 0) { |
845 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 846 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 | 847 | |
82fa3c77 KS |
848 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
849 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); | |
5b54dac8 | 850 | |
33be96e4 | 851 | if (atomic_read(&net_device-> |
3a67c9cc | 852 | queue_sends[q_idx]) < 1) |
5b54dac8 | 853 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 854 | ndev, q_idx)); |
33be96e4 | 855 | } |
1d06825b | 856 | } else if (ret == -EAGAIN) { |
5b54dac8 | 857 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
858 | ndev, q_idx)); |
859 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 860 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 861 | ndev, q_idx)); |
33be96e4 HZ |
862 | ret = -ENOSPC; |
863 | } | |
1d06825b | 864 | } else { |
d9871158 | 865 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 866 | packet, ret); |
1d06825b | 867 | } |
fceaf24a | 868 | |
7c3877f2 HZ |
869 | return ret; |
870 | } | |
871 | ||
c85e4924 HZ |
872 | /* Move packet out of multi send data (msd), and clear msd */ |
873 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
874 | struct sk_buff **msd_skb, | |
875 | struct multi_send_data *msdp) | |
876 | { | |
877 | *msd_skb = msdp->skb; | |
878 | *msd_send = msdp->pkt; | |
879 | msdp->skb = NULL; | |
880 | msdp->pkt = NULL; | |
881 | msdp->count = 0; | |
882 | } | |
883 | ||
7c3877f2 | 884 | int netvsc_send(struct hv_device *device, |
24476760 | 885 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 886 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
887 | struct hv_page_buffer **pb, |
888 | struct sk_buff *skb) | |
7c3877f2 HZ |
889 | { |
890 | struct netvsc_device *net_device; | |
891 | int ret = 0, m_ret = 0; | |
892 | struct vmbus_channel *out_channel; | |
893 | u16 q_idx = packet->q_idx; | |
894 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
895 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
896 | struct multi_send_data *msdp; |
897 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 898 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 899 | bool try_batch; |
bde79be5 | 900 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
901 | |
902 | net_device = get_outbound_net_device(device); | |
903 | if (!net_device) | |
904 | return -ENODEV; | |
905 | ||
8b9fbe1a | 906 | out_channel = net_device->chn_table[q_idx]; |
25b85ee8 | 907 | |
7c3877f2 | 908 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 909 | packet->cp_partial = false; |
7c3877f2 | 910 | |
cf8190e4 HZ |
911 | /* Send control message directly without accessing msd (Multi-Send |
912 | * Data) field which may be changed during data packet processing. | |
913 | */ | |
914 | if (!skb) { | |
915 | cur_send = packet; | |
916 | goto send_now; | |
917 | } | |
918 | ||
7c3877f2 HZ |
919 | msdp = &net_device->msd[q_idx]; |
920 | ||
921 | /* batch packets in send buffer if possible */ | |
7c3877f2 HZ |
922 | if (msdp->pkt) |
923 | msd_len = msdp->pkt->total_data_buflen; | |
924 | ||
694a9fb0 | 925 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
aa0a34be HZ |
926 | net_device->max_pkt; |
927 | ||
928 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
929 | net_device->send_section_size) { |
930 | section_index = msdp->pkt->send_buf_index; | |
931 | ||
aa0a34be HZ |
932 | } else if (try_batch && msd_len + packet->rmsg_size < |
933 | net_device->send_section_size) { | |
934 | section_index = msdp->pkt->send_buf_index; | |
935 | packet->cp_partial = true; | |
936 | ||
694a9fb0 | 937 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
7c3877f2 HZ |
938 | net_device->send_section_size) { |
939 | section_index = netvsc_get_next_send_section(net_device); | |
940 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
941 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
942 | msd_len = 0; | |
7c3877f2 HZ |
943 | } |
944 | } | |
945 | ||
946 | if (section_index != NETVSC_INVALID_INDEX) { | |
947 | netvsc_copy_to_send_buf(net_device, | |
948 | section_index, msd_len, | |
694a9fb0 | 949 | packet, rndis_msg, pb, skb); |
b08cc791 | 950 | |
7c3877f2 | 951 | packet->send_buf_index = section_index; |
aa0a34be HZ |
952 | |
953 | if (packet->cp_partial) { | |
954 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
955 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
956 | } else { | |
957 | packet->page_buf_cnt = 0; | |
958 | packet->total_data_buflen += msd_len; | |
aa0a34be | 959 | } |
7c3877f2 | 960 | |
c85e4924 HZ |
961 | if (msdp->skb) |
962 | dev_kfree_skb_any(msdp->skb); | |
ee90b812 | 963 | |
bde79be5 | 964 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 965 | msdp->skb = skb; |
7c3877f2 HZ |
966 | msdp->pkt = packet; |
967 | msdp->count++; | |
968 | } else { | |
969 | cur_send = packet; | |
c85e4924 | 970 | msdp->skb = NULL; |
7c3877f2 HZ |
971 | msdp->pkt = NULL; |
972 | msdp->count = 0; | |
973 | } | |
974 | } else { | |
c85e4924 | 975 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
976 | cur_send = packet; |
977 | } | |
978 | ||
7c3877f2 | 979 | if (msd_send) { |
c85e4924 | 980 | m_ret = netvsc_send_pkt(msd_send, net_device, NULL, msd_skb); |
7c3877f2 HZ |
981 | |
982 | if (m_ret != 0) { | |
983 | netvsc_free_send_slot(net_device, | |
984 | msd_send->send_buf_index); | |
c85e4924 | 985 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
986 | } |
987 | } | |
988 | ||
cf8190e4 | 989 | send_now: |
7c3877f2 | 990 | if (cur_send) |
3a3d9a0a | 991 | ret = netvsc_send_pkt(cur_send, net_device, pb, skb); |
7c3877f2 | 992 | |
7aab5159 JS |
993 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
994 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 995 | |
fceaf24a HJ |
996 | return ret; |
997 | } | |
998 | ||
5fa9d3c5 | 999 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 1000 | struct vmbus_channel *channel, |
97c1723a | 1001 | struct netvsc_device *net_device, |
63f6921d | 1002 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
1003 | { |
1004 | struct nvsp_message recvcompMessage; | |
1005 | int retries = 0; | |
1006 | int ret; | |
2ddd5e5f | 1007 | struct net_device *ndev; |
2ddd5e5f S |
1008 | |
1009 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
1010 | |
1011 | recvcompMessage.hdr.msg_type = | |
1012 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
1013 | ||
63f6921d | 1014 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
1015 | |
1016 | retry_send_cmplt: | |
1017 | /* Send the completion */ | |
5b54dac8 | 1018 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
1019 | sizeof(struct nvsp_message), transaction_id, |
1020 | VM_PKT_COMP, 0); | |
1021 | if (ret == 0) { | |
1022 | /* success */ | |
1023 | /* no-op */ | |
d2598f01 | 1024 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
1025 | /* no more room...wait a bit and attempt to retry 3 times */ |
1026 | retries++; | |
d9871158 | 1027 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 1028 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
1029 | |
1030 | if (retries < 4) { | |
1031 | udelay(100); | |
1032 | goto retry_send_cmplt; | |
1033 | } else { | |
d9871158 | 1034 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1035 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
1036 | transaction_id); |
1037 | } | |
1038 | } else { | |
d9871158 | 1039 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1040 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
1041 | } |
1042 | } | |
1043 | ||
97c1723a | 1044 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 1045 | struct vmbus_channel *channel, |
97c1723a KS |
1046 | struct hv_device *device, |
1047 | struct vmpacket_descriptor *packet) | |
fceaf24a | 1048 | { |
85799a37 HZ |
1049 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
1050 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
1051 | struct hv_netvsc_packet nv_pkt; |
1052 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
1053 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
1054 | int i; |
1055 | int count = 0; | |
2ddd5e5f | 1056 | struct net_device *ndev; |
c4b20c63 | 1057 | void *data; |
779b4d17 | 1058 | |
2ddd5e5f | 1059 | ndev = net_device->ndev; |
fceaf24a | 1060 | |
21a80820 GKH |
1061 | /* |
1062 | * All inbound packets other than send completion should be xfer page | |
1063 | * packet | |
1064 | */ | |
415f2287 | 1065 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 1066 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 1067 | packet->type); |
fceaf24a HJ |
1068 | return; |
1069 | } | |
1070 | ||
85799a37 | 1071 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1072 | (packet->offset8 << 3)); |
fceaf24a | 1073 | |
454f18a9 | 1074 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1075 | if (nvsp_packet->hdr.msg_type != |
1076 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 1077 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 1078 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
1079 | return; |
1080 | } | |
1081 | ||
85799a37 | 1082 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1083 | |
415f2287 | 1084 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 1085 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 1086 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 1087 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
1088 | return; |
1089 | } | |
1090 | ||
4baab261 | 1091 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1092 | |
454f18a9 | 1093 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1094 | for (i = 0; i < count; i++) { |
454f18a9 | 1095 | /* Initialize the netvsc packet */ |
c4b20c63 | 1096 | data = (void *)((unsigned long)net_device-> |
45326342 | 1097 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); |
72a2f5bd | 1098 | netvsc_packet->total_data_buflen = |
415f2287 | 1099 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1100 | |
454f18a9 | 1101 | /* Pass it to the upper layer */ |
10082f98 KS |
1102 | status = rndis_filter_receive(device, netvsc_packet, &data, |
1103 | channel); | |
fceaf24a | 1104 | |
fceaf24a HJ |
1105 | } |
1106 | ||
4baab261 HZ |
1107 | netvsc_send_recv_completion(device, channel, net_device, |
1108 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
1109 | } |
1110 | ||
5b54dac8 HZ |
1111 | |
1112 | static void netvsc_send_table(struct hv_device *hdev, | |
71790a27 | 1113 | struct nvsp_message *nvmsg) |
5b54dac8 HZ |
1114 | { |
1115 | struct netvsc_device *nvscdev; | |
1116 | struct net_device *ndev; | |
5b54dac8 HZ |
1117 | int i; |
1118 | u32 count, *tab; | |
1119 | ||
1120 | nvscdev = get_outbound_net_device(hdev); | |
1121 | if (!nvscdev) | |
1122 | return; | |
1123 | ndev = nvscdev->ndev; | |
1124 | ||
5b54dac8 HZ |
1125 | count = nvmsg->msg.v5_msg.send_table.count; |
1126 | if (count != VRSS_SEND_TAB_SIZE) { | |
1127 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1128 | return; | |
1129 | } | |
1130 | ||
1131 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1132 | nvmsg->msg.v5_msg.send_table.offset); | |
1133 | ||
1134 | for (i = 0; i < count; i++) | |
1135 | nvscdev->send_table[i] = tab[i]; | |
1136 | } | |
1137 | ||
71790a27 HZ |
1138 | static void netvsc_send_vf(struct netvsc_device *nvdev, |
1139 | struct nvsp_message *nvmsg) | |
1140 | { | |
1141 | nvdev->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; | |
1142 | nvdev->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
1143 | } | |
1144 | ||
1145 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
1146 | struct netvsc_device *nvdev, | |
1147 | struct nvsp_message *nvmsg) | |
1148 | { | |
1149 | switch (nvmsg->hdr.msg_type) { | |
1150 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1151 | netvsc_send_table(hdev, nvmsg); | |
1152 | break; | |
1153 | ||
1154 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
1155 | netvsc_send_vf(nvdev, nvmsg); | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | ||
5b54dac8 | 1160 | void netvsc_channel_cb(void *context) |
fceaf24a | 1161 | { |
21a80820 | 1162 | int ret; |
5b54dac8 HZ |
1163 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
1164 | struct hv_device *device; | |
85799a37 HZ |
1165 | struct netvsc_device *net_device; |
1166 | u32 bytes_recvd; | |
1167 | u64 request_id; | |
8dc0a06a | 1168 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1169 | unsigned char *buffer; |
1170 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1171 | struct net_device *ndev; |
71790a27 | 1172 | struct nvsp_message *nvmsg; |
fceaf24a | 1173 | |
5b54dac8 HZ |
1174 | if (channel->primary_channel != NULL) |
1175 | device = channel->primary_channel->device_obj; | |
1176 | else | |
1177 | device = channel->device_obj; | |
1178 | ||
5a71ae30 | 1179 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1180 | if (!net_device) |
ee0c4c39 | 1181 | return; |
2ddd5e5f | 1182 | ndev = net_device->ndev; |
5b54dac8 | 1183 | buffer = get_per_channel_state(channel); |
fceaf24a | 1184 | |
21a80820 | 1185 | do { |
5b54dac8 | 1186 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1187 | &bytes_recvd, &request_id); |
21a80820 | 1188 | if (ret == 0) { |
85799a37 | 1189 | if (bytes_recvd > 0) { |
21a80820 | 1190 | desc = (struct vmpacket_descriptor *)buffer; |
71790a27 HZ |
1191 | nvmsg = (struct nvsp_message *)((unsigned long) |
1192 | desc + (desc->offset8 << 3)); | |
415f2287 HZ |
1193 | switch (desc->type) { |
1194 | case VM_PKT_COMP: | |
97c1723a | 1195 | netvsc_send_completion(net_device, |
25b85ee8 | 1196 | channel, |
97c1723a | 1197 | device, desc); |
21a80820 GKH |
1198 | break; |
1199 | ||
415f2287 | 1200 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
1201 | netvsc_receive(net_device, channel, |
1202 | device, desc); | |
1203 | break; | |
1204 | ||
1205 | case VM_PKT_DATA_INBAND: | |
71790a27 HZ |
1206 | netvsc_receive_inband(device, |
1207 | net_device, | |
1208 | nvmsg); | |
21a80820 GKH |
1209 | break; |
1210 | ||
1211 | default: | |
d9871158 | 1212 | netdev_err(ndev, |
21a80820 GKH |
1213 | "unhandled packet type %d, " |
1214 | "tid %llx len %d\n", | |
415f2287 | 1215 | desc->type, request_id, |
85799a37 | 1216 | bytes_recvd); |
21a80820 | 1217 | break; |
fceaf24a HJ |
1218 | } |
1219 | ||
21a80820 | 1220 | } else { |
ee0c4c39 KS |
1221 | /* |
1222 | * We are done for this pass. | |
1223 | */ | |
fceaf24a HJ |
1224 | break; |
1225 | } | |
ee0c4c39 | 1226 | |
3d5cad97 | 1227 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1228 | if (bufferlen > NETVSC_PACKET_SIZE) |
1229 | kfree(buffer); | |
21a80820 | 1230 | /* Handle large packet */ |
85799a37 | 1231 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1232 | if (buffer == NULL) { |
454f18a9 | 1233 | /* Try again next time around */ |
d9871158 | 1234 | netdev_err(ndev, |
21a80820 | 1235 | "unable to allocate buffer of size " |
c909ebbd | 1236 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1237 | break; |
1238 | } | |
1239 | ||
85799a37 | 1240 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1241 | } |
1242 | } while (1); | |
1243 | ||
ee0c4c39 KS |
1244 | if (bufferlen > NETVSC_PACKET_SIZE) |
1245 | kfree(buffer); | |
fceaf24a HJ |
1246 | return; |
1247 | } | |
af24ce42 | 1248 | |
b637e023 HZ |
1249 | /* |
1250 | * netvsc_device_add - Callback when the device belonging to this | |
1251 | * driver is added | |
1252 | */ | |
7bd23a4d | 1253 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1254 | { |
1255 | int ret = 0; | |
aae23986 S |
1256 | int ring_size = |
1257 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1258 | struct netvsc_device *net_device; |
2ddd5e5f | 1259 | struct net_device *ndev; |
b637e023 HZ |
1260 | |
1261 | net_device = alloc_net_device(device); | |
b1c84927 DC |
1262 | if (!net_device) |
1263 | return -ENOMEM; | |
b637e023 | 1264 | |
5b54dac8 HZ |
1265 | net_device->ring_size = ring_size; |
1266 | ||
2ddd5e5f S |
1267 | /* |
1268 | * Coming into this function, struct net_device * is | |
1269 | * registered as the driver private data. | |
1270 | * In alloc_net_device(), we register struct netvsc_device * | |
1271 | * as the driver private data and stash away struct net_device * | |
1272 | * in struct netvsc_device *. | |
1273 | */ | |
1274 | ndev = net_device->ndev; | |
1275 | ||
3f300ff4 SX |
1276 | /* Add netvsc_device context to netvsc_device */ |
1277 | net_device->nd_ctx = netdev_priv(ndev); | |
1278 | ||
b637e023 | 1279 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1280 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1281 | |
5b54dac8 HZ |
1282 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1283 | ||
b637e023 | 1284 | /* Open the channel */ |
aae23986 S |
1285 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1286 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1287 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1288 | |
1289 | if (ret != 0) { | |
d9871158 | 1290 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1291 | goto cleanup; |
1292 | } | |
1293 | ||
1294 | /* Channel is opened */ | |
c909ebbd | 1295 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1296 | |
5b54dac8 HZ |
1297 | net_device->chn_table[0] = device->channel; |
1298 | ||
b637e023 HZ |
1299 | /* Connect with the NetVsp */ |
1300 | ret = netvsc_connect_vsp(device); | |
1301 | if (ret != 0) { | |
d9871158 | 1302 | netdev_err(ndev, |
c909ebbd | 1303 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1304 | goto close; |
1305 | } | |
1306 | ||
1307 | return ret; | |
1308 | ||
1309 | close: | |
1310 | /* Now, we can close the channel safely */ | |
1311 | vmbus_close(device->channel); | |
1312 | ||
1313 | cleanup: | |
f90251c8 | 1314 | free_netvsc_device(net_device); |
b637e023 HZ |
1315 | |
1316 | return ret; | |
1317 | } |