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Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
5654e932 | 22 | #include <linux/kernel.h> |
0c3b7b2f S |
23 | #include <linux/sched.h> |
24 | #include <linux/wait.h> | |
0ffa63b0 | 25 | #include <linux/mm.h> |
b4362c9c | 26 | #include <linux/delay.h> |
21a80820 | 27 | #include <linux/io.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
d9871158 | 29 | #include <linux/netdevice.h> |
f157e78d | 30 | #include <linux/if_ether.h> |
d6472302 | 31 | #include <linux/vmalloc.h> |
c25aaf81 | 32 | #include <asm/sync_bitops.h> |
3f335ea2 | 33 | |
5ca7252a | 34 | #include "hyperv_net.h" |
fceaf24a HJ |
35 | |
36 | ||
5a71ae30 | 37 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 38 | { |
85799a37 | 39 | struct netvsc_device *net_device; |
2ddd5e5f | 40 | struct net_device *ndev = hv_get_drvdata(device); |
7c3877f2 | 41 | int i; |
fceaf24a | 42 | |
85799a37 HZ |
43 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
44 | if (!net_device) | |
fceaf24a HJ |
45 | return NULL; |
46 | ||
f90251c8 HZ |
47 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
48 | if (!net_device->cb_buffer) { | |
49 | kfree(net_device); | |
50 | return NULL; | |
51 | } | |
52 | ||
dc5cd894 | 53 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 54 | net_device->start_remove = false; |
c38b9c71 | 55 | net_device->destroy = false; |
53d21fdb | 56 | net_device->dev = device; |
2ddd5e5f | 57 | net_device->ndev = ndev; |
7c3877f2 HZ |
58 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
59 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
60 | ||
61 | for (i = 0; i < num_online_cpus(); i++) | |
62 | spin_lock_init(&net_device->msd[i].lock); | |
fceaf24a | 63 | |
2ddd5e5f | 64 | hv_set_drvdata(device, net_device); |
85799a37 | 65 | return net_device; |
fceaf24a HJ |
66 | } |
67 | ||
f90251c8 HZ |
68 | static void free_netvsc_device(struct netvsc_device *nvdev) |
69 | { | |
70 | kfree(nvdev->cb_buffer); | |
71 | kfree(nvdev); | |
72 | } | |
73 | ||
5a71ae30 | 74 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 75 | { |
85799a37 | 76 | struct netvsc_device *net_device; |
fceaf24a | 77 | |
2ddd5e5f | 78 | net_device = hv_get_drvdata(device); |
9d88f33a | 79 | if (net_device && net_device->destroy) |
85799a37 | 80 | net_device = NULL; |
fceaf24a | 81 | |
85799a37 | 82 | return net_device; |
fceaf24a HJ |
83 | } |
84 | ||
5a71ae30 | 85 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 86 | { |
85799a37 | 87 | struct netvsc_device *net_device; |
fceaf24a | 88 | |
2ddd5e5f | 89 | net_device = hv_get_drvdata(device); |
9d88f33a S |
90 | |
91 | if (!net_device) | |
92 | goto get_in_err; | |
93 | ||
94 | if (net_device->destroy && | |
95 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 96 | net_device = NULL; |
fceaf24a | 97 | |
9d88f33a | 98 | get_in_err: |
85799a37 | 99 | return net_device; |
fceaf24a HJ |
100 | } |
101 | ||
fceaf24a | 102 | |
c25aaf81 | 103 | static int netvsc_destroy_buf(struct netvsc_device *net_device) |
ec91cd09 HZ |
104 | { |
105 | struct nvsp_message *revoke_packet; | |
106 | int ret = 0; | |
2ddd5e5f | 107 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
108 | |
109 | /* | |
110 | * If we got a section count, it means we received a | |
111 | * SendReceiveBufferComplete msg (ie sent | |
112 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
113 | * to send a revoke msg here | |
114 | */ | |
115 | if (net_device->recv_section_cnt) { | |
116 | /* Send the revoke receive buffer */ | |
117 | revoke_packet = &net_device->revoke_packet; | |
118 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
119 | ||
120 | revoke_packet->hdr.msg_type = | |
121 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
122 | revoke_packet->msg.v1_msg. | |
123 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
124 | ||
125 | ret = vmbus_sendpacket(net_device->dev->channel, | |
126 | revoke_packet, | |
127 | sizeof(struct nvsp_message), | |
128 | (unsigned long)revoke_packet, | |
129 | VM_PKT_DATA_INBAND, 0); | |
130 | /* | |
131 | * If we failed here, we might as well return and | |
132 | * have a leak rather than continue and a bugchk | |
133 | */ | |
134 | if (ret != 0) { | |
d9871158 | 135 | netdev_err(ndev, "unable to send " |
c909ebbd | 136 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 137 | return ret; |
ec91cd09 HZ |
138 | } |
139 | } | |
140 | ||
141 | /* Teardown the gpadl on the vsp end */ | |
142 | if (net_device->recv_buf_gpadl_handle) { | |
143 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
144 | net_device->recv_buf_gpadl_handle); | |
145 | ||
146 | /* If we failed here, we might as well return and have a leak | |
147 | * rather than continue and a bugchk | |
148 | */ | |
149 | if (ret != 0) { | |
d9871158 | 150 | netdev_err(ndev, |
c909ebbd | 151 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 152 | return ret; |
ec91cd09 HZ |
153 | } |
154 | net_device->recv_buf_gpadl_handle = 0; | |
155 | } | |
156 | ||
157 | if (net_device->recv_buf) { | |
158 | /* Free up the receive buffer */ | |
b679ef73 | 159 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
160 | net_device->recv_buf = NULL; |
161 | } | |
162 | ||
163 | if (net_device->recv_section) { | |
164 | net_device->recv_section_cnt = 0; | |
165 | kfree(net_device->recv_section); | |
166 | net_device->recv_section = NULL; | |
167 | } | |
168 | ||
c25aaf81 KS |
169 | /* Deal with the send buffer we may have setup. |
170 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
171 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
172 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
173 | * to send a revoke msg here |
174 | */ | |
175 | if (net_device->send_section_size) { | |
176 | /* Send the revoke receive buffer */ | |
177 | revoke_packet = &net_device->revoke_packet; | |
178 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
179 | ||
180 | revoke_packet->hdr.msg_type = | |
181 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
182 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
183 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 KS |
184 | |
185 | ret = vmbus_sendpacket(net_device->dev->channel, | |
186 | revoke_packet, | |
187 | sizeof(struct nvsp_message), | |
188 | (unsigned long)revoke_packet, | |
189 | VM_PKT_DATA_INBAND, 0); | |
190 | /* If we failed here, we might as well return and | |
191 | * have a leak rather than continue and a bugchk | |
192 | */ | |
193 | if (ret != 0) { | |
194 | netdev_err(ndev, "unable to send " | |
195 | "revoke send buffer to netvsp\n"); | |
196 | return ret; | |
197 | } | |
198 | } | |
199 | /* Teardown the gpadl on the vsp end */ | |
200 | if (net_device->send_buf_gpadl_handle) { | |
201 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
202 | net_device->send_buf_gpadl_handle); | |
203 | ||
204 | /* If we failed here, we might as well return and have a leak | |
205 | * rather than continue and a bugchk | |
206 | */ | |
207 | if (ret != 0) { | |
208 | netdev_err(ndev, | |
209 | "unable to teardown send buffer's gpadl\n"); | |
210 | return ret; | |
211 | } | |
2f18423d | 212 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
213 | } |
214 | if (net_device->send_buf) { | |
c51ed182 | 215 | /* Free up the send buffer */ |
06b47aac | 216 | vfree(net_device->send_buf); |
c25aaf81 KS |
217 | net_device->send_buf = NULL; |
218 | } | |
219 | kfree(net_device->send_section_map); | |
220 | ||
ec91cd09 HZ |
221 | return ret; |
222 | } | |
223 | ||
c25aaf81 | 224 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 225 | { |
21a80820 | 226 | int ret = 0; |
7390fe9c | 227 | unsigned long t; |
85799a37 HZ |
228 | struct netvsc_device *net_device; |
229 | struct nvsp_message *init_packet; | |
2ddd5e5f | 230 | struct net_device *ndev; |
0a726c2b | 231 | int node; |
fceaf24a | 232 | |
5a71ae30 | 233 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 234 | if (!net_device) |
927bc33c | 235 | return -ENODEV; |
2ddd5e5f | 236 | ndev = net_device->ndev; |
fceaf24a | 237 | |
0a726c2b S |
238 | node = cpu_to_node(device->channel->target_cpu); |
239 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
240 | if (!net_device->recv_buf) | |
241 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
242 | ||
53d21fdb | 243 | if (!net_device->recv_buf) { |
d9871158 | 244 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 245 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 246 | ret = -ENOMEM; |
0c3b7b2f | 247 | goto cleanup; |
fceaf24a | 248 | } |
fceaf24a | 249 | |
454f18a9 BP |
250 | /* |
251 | * Establish the gpadl handle for this buffer on this | |
252 | * channel. Note: This call uses the vmbus connection rather | |
253 | * than the channel to establish the gpadl handle. | |
254 | */ | |
53d21fdb HZ |
255 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
256 | net_device->recv_buf_size, | |
257 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 258 | if (ret != 0) { |
d9871158 | 259 | netdev_err(ndev, |
c909ebbd | 260 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 261 | goto cleanup; |
fceaf24a HJ |
262 | } |
263 | ||
fceaf24a | 264 | |
454f18a9 | 265 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 266 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 267 | |
85799a37 | 268 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 269 | |
53d21fdb HZ |
270 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
271 | init_packet->msg.v1_msg.send_recv_buf. | |
272 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
273 | init_packet->msg.v1_msg. | |
274 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 275 | |
454f18a9 | 276 | /* Send the gpadl notification request */ |
85799a37 | 277 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 278 | sizeof(struct nvsp_message), |
85799a37 | 279 | (unsigned long)init_packet, |
415f2287 | 280 | VM_PKT_DATA_INBAND, |
5a4df290 | 281 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 282 | if (ret != 0) { |
d9871158 | 283 | netdev_err(ndev, |
c909ebbd | 284 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 285 | goto cleanup; |
fceaf24a HJ |
286 | } |
287 | ||
5c5781b3 | 288 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 289 | BUG_ON(t == 0); |
0c3b7b2f | 290 | |
fceaf24a | 291 | |
454f18a9 | 292 | /* Check the response */ |
53d21fdb HZ |
293 | if (init_packet->msg.v1_msg. |
294 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 295 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 296 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
297 | init_packet->msg.v1_msg. |
298 | send_recv_buf_complete.status); | |
927bc33c | 299 | ret = -EINVAL; |
0c3b7b2f | 300 | goto cleanup; |
fceaf24a HJ |
301 | } |
302 | ||
454f18a9 | 303 | /* Parse the response */ |
fceaf24a | 304 | |
53d21fdb HZ |
305 | net_device->recv_section_cnt = init_packet->msg. |
306 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 307 | |
c1813200 HZ |
308 | net_device->recv_section = kmemdup( |
309 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
310 | net_device->recv_section_cnt * | |
311 | sizeof(struct nvsp_1_receive_buffer_section), | |
312 | GFP_KERNEL); | |
53d21fdb | 313 | if (net_device->recv_section == NULL) { |
927bc33c | 314 | ret = -EINVAL; |
0c3b7b2f | 315 | goto cleanup; |
fceaf24a HJ |
316 | } |
317 | ||
21a80820 GKH |
318 | /* |
319 | * For 1st release, there should only be 1 section that represents the | |
320 | * entire receive buffer | |
321 | */ | |
53d21fdb HZ |
322 | if (net_device->recv_section_cnt != 1 || |
323 | net_device->recv_section->offset != 0) { | |
927bc33c | 324 | ret = -EINVAL; |
0c3b7b2f | 325 | goto cleanup; |
fceaf24a HJ |
326 | } |
327 | ||
c25aaf81 KS |
328 | /* Now setup the send buffer. |
329 | */ | |
5defde59 S |
330 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
331 | if (!net_device->send_buf) | |
332 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
333 | if (!net_device->send_buf) { |
334 | netdev_err(ndev, "unable to allocate send " | |
335 | "buffer of size %d\n", net_device->send_buf_size); | |
336 | ret = -ENOMEM; | |
337 | goto cleanup; | |
338 | } | |
339 | ||
340 | /* Establish the gpadl handle for this buffer on this | |
341 | * channel. Note: This call uses the vmbus connection rather | |
342 | * than the channel to establish the gpadl handle. | |
343 | */ | |
344 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
345 | net_device->send_buf_size, | |
346 | &net_device->send_buf_gpadl_handle); | |
347 | if (ret != 0) { | |
348 | netdev_err(ndev, | |
349 | "unable to establish send buffer's gpadl\n"); | |
350 | goto cleanup; | |
351 | } | |
352 | ||
353 | /* Notify the NetVsp of the gpadl handle */ | |
354 | init_packet = &net_device->channel_init_pkt; | |
355 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
356 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 357 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 358 | net_device->send_buf_gpadl_handle; |
c51ed182 | 359 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
360 | |
361 | /* Send the gpadl notification request */ | |
362 | ret = vmbus_sendpacket(device->channel, init_packet, | |
363 | sizeof(struct nvsp_message), | |
364 | (unsigned long)init_packet, | |
365 | VM_PKT_DATA_INBAND, | |
366 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
367 | if (ret != 0) { | |
368 | netdev_err(ndev, | |
369 | "unable to send send buffer's gpadl to netvsp\n"); | |
370 | goto cleanup; | |
371 | } | |
372 | ||
373 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
374 | BUG_ON(t == 0); | |
375 | ||
376 | /* Check the response */ | |
377 | if (init_packet->msg.v1_msg. | |
378 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
379 | netdev_err(ndev, "Unable to complete send buffer " | |
380 | "initialization with NetVsp - status %d\n", | |
381 | init_packet->msg.v1_msg. | |
c51ed182 | 382 | send_send_buf_complete.status); |
c25aaf81 KS |
383 | ret = -EINVAL; |
384 | goto cleanup; | |
385 | } | |
386 | ||
387 | /* Parse the response */ | |
388 | net_device->send_section_size = init_packet->msg. | |
389 | v1_msg.send_send_buf_complete.section_size; | |
390 | ||
391 | /* Section count is simply the size divided by the section size. | |
392 | */ | |
393 | net_device->send_section_cnt = | |
394 | net_device->send_buf_size/net_device->send_section_size; | |
395 | ||
396 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
397 | net_device->send_section_size, net_device->send_section_cnt); | |
398 | ||
399 | /* Setup state for managing the send buffer. */ | |
400 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
401 | BITS_PER_LONG); | |
402 | ||
403 | net_device->send_section_map = | |
404 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
405 | if (net_device->send_section_map == NULL) { |
406 | ret = -ENOMEM; | |
c25aaf81 | 407 | goto cleanup; |
dd1d3f8f | 408 | } |
c25aaf81 | 409 | |
0c3b7b2f | 410 | goto exit; |
fceaf24a | 411 | |
0c3b7b2f | 412 | cleanup: |
c25aaf81 | 413 | netvsc_destroy_buf(net_device); |
fceaf24a | 414 | |
0c3b7b2f | 415 | exit: |
fceaf24a HJ |
416 | return ret; |
417 | } | |
418 | ||
fceaf24a | 419 | |
f157e78d HZ |
420 | /* Negotiate NVSP protocol version */ |
421 | static int negotiate_nvsp_ver(struct hv_device *device, | |
422 | struct netvsc_device *net_device, | |
423 | struct nvsp_message *init_packet, | |
424 | u32 nvsp_ver) | |
fceaf24a | 425 | { |
7390fe9c NMG |
426 | int ret; |
427 | unsigned long t; | |
fceaf24a | 428 | |
85799a37 | 429 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 430 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
431 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
432 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 433 | |
454f18a9 | 434 | /* Send the init request */ |
85799a37 | 435 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 436 | sizeof(struct nvsp_message), |
85799a37 | 437 | (unsigned long)init_packet, |
415f2287 | 438 | VM_PKT_DATA_INBAND, |
5a4df290 | 439 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 440 | |
b8a3d52b | 441 | if (ret != 0) |
f157e78d | 442 | return ret; |
fceaf24a | 443 | |
5c5781b3 | 444 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 445 | |
f157e78d HZ |
446 | if (t == 0) |
447 | return -ETIMEDOUT; | |
fceaf24a | 448 | |
53d21fdb | 449 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
450 | NVSP_STAT_SUCCESS) |
451 | return -EINVAL; | |
fceaf24a | 452 | |
a1eabb01 | 453 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
454 | return 0; |
455 | ||
71790a27 | 456 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
457 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
458 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d3c9d37 HZ |
459 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu + |
460 | ETH_HLEN; | |
1f5f3a75 | 461 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 462 | |
71790a27 HZ |
463 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) |
464 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; | |
465 | ||
f157e78d HZ |
466 | ret = vmbus_sendpacket(device->channel, init_packet, |
467 | sizeof(struct nvsp_message), | |
468 | (unsigned long)init_packet, | |
469 | VM_PKT_DATA_INBAND, 0); | |
470 | ||
471 | return ret; | |
472 | } | |
473 | ||
474 | static int netvsc_connect_vsp(struct hv_device *device) | |
475 | { | |
476 | int ret; | |
477 | struct netvsc_device *net_device; | |
478 | struct nvsp_message *init_packet; | |
479 | int ndis_version; | |
480 | struct net_device *ndev; | |
a1eabb01 HZ |
481 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
482 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
483 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
484 | |
485 | net_device = get_outbound_net_device(device); | |
486 | if (!net_device) | |
487 | return -ENODEV; | |
488 | ndev = net_device->ndev; | |
489 | ||
490 | init_packet = &net_device->channel_init_pkt; | |
491 | ||
492 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
493 | for (i = num_ver - 1; i >= 0; i--) |
494 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
495 | ver_list[i]) == 0) { | |
496 | net_device->nvsp_version = ver_list[i]; | |
497 | break; | |
498 | } | |
499 | ||
500 | if (i < 0) { | |
0f48c72c | 501 | ret = -EPROTO; |
0c3b7b2f | 502 | goto cleanup; |
fceaf24a | 503 | } |
f157e78d HZ |
504 | |
505 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
506 | ||
454f18a9 | 507 | /* Send the ndis version */ |
85799a37 | 508 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 509 | |
a1eabb01 | 510 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 511 | ndis_version = 0x00060001; |
a1eabb01 HZ |
512 | else |
513 | ndis_version = 0x0006001e; | |
fceaf24a | 514 | |
53d21fdb HZ |
515 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
516 | init_packet->msg.v1_msg. | |
517 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 518 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
519 | init_packet->msg.v1_msg. |
520 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 521 | ndis_version & 0xFFFF; |
fceaf24a | 522 | |
454f18a9 | 523 | /* Send the init request */ |
85799a37 | 524 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
525 | sizeof(struct nvsp_message), |
526 | (unsigned long)init_packet, | |
527 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 528 | if (ret != 0) |
0c3b7b2f | 529 | goto cleanup; |
454f18a9 BP |
530 | |
531 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
532 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
533 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
534 | else | |
535 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 536 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 537 | |
c25aaf81 | 538 | ret = netvsc_init_buf(device); |
fceaf24a | 539 | |
0c3b7b2f | 540 | cleanup: |
fceaf24a HJ |
541 | return ret; |
542 | } | |
543 | ||
648dc598 | 544 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 545 | { |
c25aaf81 | 546 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
547 | } |
548 | ||
3e189519 | 549 | /* |
5a71ae30 | 550 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 551 | */ |
905620d1 | 552 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 553 | { |
85799a37 | 554 | struct netvsc_device *net_device; |
c38b9c71 | 555 | unsigned long flags; |
fceaf24a | 556 | |
2ddd5e5f | 557 | net_device = hv_get_drvdata(device); |
fceaf24a | 558 | |
648dc598 | 559 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 560 | |
3852409b | 561 | /* |
9d88f33a S |
562 | * Since we have already drained, we don't need to busy wait |
563 | * as was done in final_release_stor_device() | |
564 | * Note that we cannot set the ext pointer to NULL until | |
565 | * we have drained - to drain the outgoing packets, we need to | |
566 | * allow incoming packets. | |
3852409b | 567 | */ |
9d88f33a S |
568 | |
569 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 570 | hv_set_drvdata(device, NULL); |
9d88f33a | 571 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 572 | |
86c921af S |
573 | /* |
574 | * At this point, no one should be accessing net_device | |
575 | * except in here | |
576 | */ | |
c909ebbd | 577 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 578 | |
454f18a9 | 579 | /* Now, we can close the channel safely */ |
85799a37 | 580 | vmbus_close(device->channel); |
fceaf24a | 581 | |
454f18a9 | 582 | /* Release all resources */ |
aa99c479 | 583 | vfree(net_device->sub_cb_buf); |
f90251c8 | 584 | free_netvsc_device(net_device); |
21a80820 | 585 | return 0; |
fceaf24a HJ |
586 | } |
587 | ||
33be96e4 HZ |
588 | |
589 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
590 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
591 | ||
592 | /* | |
593 | * Get the percentage of available bytes to write in the ring. | |
594 | * The return value is in range from 0 to 100. | |
595 | */ | |
596 | static inline u32 hv_ringbuf_avail_percent( | |
597 | struct hv_ring_buffer_info *ring_info) | |
598 | { | |
599 | u32 avail_read, avail_write; | |
600 | ||
601 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
602 | ||
603 | return avail_write * 100 / ring_info->ring_datasize; | |
604 | } | |
605 | ||
c25aaf81 KS |
606 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
607 | u32 index) | |
608 | { | |
609 | sync_change_bit(index, net_device->send_section_map); | |
610 | } | |
611 | ||
97c1723a | 612 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 613 | struct vmbus_channel *incoming_channel, |
97c1723a | 614 | struct hv_device *device, |
85799a37 | 615 | struct vmpacket_descriptor *packet) |
fceaf24a | 616 | { |
85799a37 HZ |
617 | struct nvsp_message *nvsp_packet; |
618 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 619 | struct net_device *ndev; |
c25aaf81 | 620 | u32 send_index; |
fceaf24a | 621 | |
2ddd5e5f | 622 | ndev = net_device->ndev; |
fceaf24a | 623 | |
85799a37 | 624 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 625 | (packet->offset8 << 3)); |
fceaf24a | 626 | |
53d21fdb HZ |
627 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
628 | (nvsp_packet->hdr.msg_type == | |
629 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
630 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
631 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
632 | (nvsp_packet->hdr.msg_type == | |
633 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 634 | /* Copy the response back */ |
53d21fdb | 635 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 636 | sizeof(struct nvsp_message)); |
35abb21a | 637 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
638 | } else if (nvsp_packet->hdr.msg_type == |
639 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 640 | int num_outstanding_sends; |
5b54dac8 HZ |
641 | u16 q_idx = 0; |
642 | struct vmbus_channel *channel = device->channel; | |
643 | int queue_sends; | |
33be96e4 | 644 | |
454f18a9 | 645 | /* Get the send context */ |
85799a37 | 646 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 647 | packet->trans_id; |
fceaf24a | 648 | |
454f18a9 | 649 | /* Notify the layer above us */ |
5b54dac8 | 650 | if (nvsc_packet) { |
c25aaf81 KS |
651 | send_index = nvsc_packet->send_buf_index; |
652 | if (send_index != NETVSC_INVALID_INDEX) | |
653 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 | 654 | q_idx = nvsc_packet->q_idx; |
25b85ee8 | 655 | channel = incoming_channel; |
893f6627 HZ |
656 | nvsc_packet->send_completion(nvsc_packet-> |
657 | send_completion_ctx); | |
5b54dac8 | 658 | } |
fceaf24a | 659 | |
33be96e4 HZ |
660 | num_outstanding_sends = |
661 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
662 | queue_sends = atomic_dec_return(&net_device-> |
663 | queue_sends[q_idx]); | |
1d06825b | 664 | |
dc5cd894 HZ |
665 | if (net_device->destroy && num_outstanding_sends == 0) |
666 | wake_up(&net_device->wait_drain); | |
667 | ||
5b54dac8 HZ |
668 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
669 | !net_device->start_remove && | |
670 | (hv_ringbuf_avail_percent(&channel->outbound) > | |
671 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
672 | netif_tx_wake_queue(netdev_get_tx_queue( | |
673 | ndev, q_idx)); | |
21a80820 | 674 | } else { |
d9871158 | 675 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 676 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
677 | } |
678 | ||
fceaf24a HJ |
679 | } |
680 | ||
c25aaf81 KS |
681 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
682 | { | |
683 | unsigned long index; | |
684 | u32 max_words = net_device->map_words; | |
685 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
686 | u32 section_cnt = net_device->send_section_cnt; | |
687 | int ret_val = NETVSC_INVALID_INDEX; | |
688 | int i; | |
689 | int prev_val; | |
690 | ||
691 | for (i = 0; i < max_words; i++) { | |
692 | if (!~(map_addr[i])) | |
693 | continue; | |
694 | index = ffz(map_addr[i]); | |
695 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
696 | if (prev_val) | |
697 | continue; | |
698 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
699 | break; | |
700 | ret_val = (index + (i * BITS_PER_LONG)); | |
701 | break; | |
702 | } | |
703 | return ret_val; | |
704 | } | |
705 | ||
da19fcd0 LP |
706 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
707 | unsigned int section_index, | |
7c3877f2 | 708 | u32 pend_size, |
da19fcd0 | 709 | struct hv_netvsc_packet *packet) |
c25aaf81 KS |
710 | { |
711 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
712 | char *dest = start + (section_index * net_device->send_section_size) |
713 | + pend_size; | |
c25aaf81 KS |
714 | int i; |
715 | u32 msg_size = 0; | |
7c3877f2 HZ |
716 | u32 padding = 0; |
717 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
718 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
719 | packet->page_buf_cnt; | |
7c3877f2 HZ |
720 | |
721 | /* Add padding */ | |
aa0a34be HZ |
722 | if (packet->is_data_pkt && packet->xmit_more && remain && |
723 | !packet->cp_partial) { | |
7c3877f2 HZ |
724 | padding = net_device->pkt_align - remain; |
725 | packet->rndis_msg->msg_len += padding; | |
726 | packet->total_data_buflen += padding; | |
727 | } | |
c25aaf81 | 728 | |
aa0a34be | 729 | for (i = 0; i < page_count; i++) { |
c25aaf81 KS |
730 | char *src = phys_to_virt(packet->page_buf[i].pfn << PAGE_SHIFT); |
731 | u32 offset = packet->page_buf[i].offset; | |
732 | u32 len = packet->page_buf[i].len; | |
733 | ||
734 | memcpy(dest, (src + offset), len); | |
735 | msg_size += len; | |
736 | dest += len; | |
737 | } | |
7c3877f2 HZ |
738 | |
739 | if (padding) { | |
740 | memset(dest, 0, padding); | |
741 | msg_size += padding; | |
742 | } | |
743 | ||
c25aaf81 KS |
744 | return msg_size; |
745 | } | |
746 | ||
7c3877f2 HZ |
747 | static inline int netvsc_send_pkt( |
748 | struct hv_netvsc_packet *packet, | |
749 | struct netvsc_device *net_device) | |
fceaf24a | 750 | { |
7c3877f2 | 751 | struct nvsp_message nvmsg; |
25b85ee8 | 752 | struct vmbus_channel *out_channel = get_channel(packet, net_device); |
3a67c9cc | 753 | u16 q_idx = packet->q_idx; |
7c3877f2 HZ |
754 | struct net_device *ndev = net_device->ndev; |
755 | u64 req_id; | |
756 | int ret; | |
aa0a34be | 757 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 758 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
c25aaf81 | 759 | |
7c3877f2 | 760 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 761 | if (packet->is_data_pkt) { |
21a80820 | 762 | /* 0 is RMC_DATA; */ |
7c3877f2 | 763 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
764 | } else { |
765 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 766 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 767 | } |
fceaf24a | 768 | |
7c3877f2 HZ |
769 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
770 | packet->send_buf_index; | |
771 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
772 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
773 | else | |
774 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
775 | packet->total_data_buflen; | |
21a80820 | 776 | |
893f6627 | 777 | if (packet->send_completion) |
00ca8f0c | 778 | req_id = (ulong)packet; |
f1ea3cd7 HZ |
779 | else |
780 | req_id = 0; | |
781 | ||
c3582a2c HZ |
782 | if (out_channel->rescind) |
783 | return -ENODEV; | |
784 | ||
82fa3c77 KS |
785 | /* |
786 | * It is possible that once we successfully place this packet | |
787 | * on the ringbuffer, we may stop the queue. In that case, we want | |
788 | * to notify the host independent of the xmit_more flag. We don't | |
789 | * need to be precise here; in the worst case we may signal the host | |
790 | * unnecessarily. | |
791 | */ | |
792 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) | |
793 | packet->xmit_more = false; | |
794 | ||
72a2f5bd | 795 | if (packet->page_buf_cnt) { |
aa0a34be HZ |
796 | pgbuf = packet->cp_partial ? packet->page_buf + |
797 | packet->rmsg_pgcnt : packet->page_buf; | |
82fa3c77 KS |
798 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
799 | pgbuf, | |
800 | packet->page_buf_cnt, | |
801 | &nvmsg, | |
802 | sizeof(struct nvsp_message), | |
803 | req_id, | |
804 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
805 | !packet->xmit_more); | |
21a80820 | 806 | } else { |
82fa3c77 KS |
807 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
808 | sizeof(struct nvsp_message), | |
809 | req_id, | |
810 | VM_PKT_DATA_INBAND, | |
811 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
812 | !packet->xmit_more); | |
fceaf24a HJ |
813 | } |
814 | ||
1d06825b HZ |
815 | if (ret == 0) { |
816 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 817 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 | 818 | |
82fa3c77 KS |
819 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
820 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); | |
5b54dac8 | 821 | |
33be96e4 | 822 | if (atomic_read(&net_device-> |
3a67c9cc | 823 | queue_sends[q_idx]) < 1) |
5b54dac8 | 824 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 825 | ndev, q_idx)); |
33be96e4 | 826 | } |
1d06825b | 827 | } else if (ret == -EAGAIN) { |
5b54dac8 | 828 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
829 | ndev, q_idx)); |
830 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 831 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 832 | ndev, q_idx)); |
33be96e4 HZ |
833 | ret = -ENOSPC; |
834 | } | |
1d06825b | 835 | } else { |
d9871158 | 836 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 837 | packet, ret); |
1d06825b | 838 | } |
fceaf24a | 839 | |
7c3877f2 HZ |
840 | return ret; |
841 | } | |
842 | ||
843 | int netvsc_send(struct hv_device *device, | |
844 | struct hv_netvsc_packet *packet) | |
845 | { | |
846 | struct netvsc_device *net_device; | |
847 | int ret = 0, m_ret = 0; | |
848 | struct vmbus_channel *out_channel; | |
849 | u16 q_idx = packet->q_idx; | |
850 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
851 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
852 | unsigned long flag; |
853 | struct multi_send_data *msdp; | |
854 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
aa0a34be | 855 | bool try_batch; |
7c3877f2 HZ |
856 | |
857 | net_device = get_outbound_net_device(device); | |
858 | if (!net_device) | |
859 | return -ENODEV; | |
860 | ||
25b85ee8 KS |
861 | out_channel = get_channel(packet, net_device); |
862 | q_idx = packet->q_idx; | |
863 | ||
7c3877f2 | 864 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 865 | packet->cp_partial = false; |
7c3877f2 HZ |
866 | |
867 | msdp = &net_device->msd[q_idx]; | |
868 | ||
869 | /* batch packets in send buffer if possible */ | |
870 | spin_lock_irqsave(&msdp->lock, flag); | |
871 | if (msdp->pkt) | |
872 | msd_len = msdp->pkt->total_data_buflen; | |
873 | ||
aa0a34be HZ |
874 | try_batch = packet->is_data_pkt && msd_len > 0 && msdp->count < |
875 | net_device->max_pkt; | |
876 | ||
877 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
878 | net_device->send_section_size) { |
879 | section_index = msdp->pkt->send_buf_index; | |
880 | ||
aa0a34be HZ |
881 | } else if (try_batch && msd_len + packet->rmsg_size < |
882 | net_device->send_section_size) { | |
883 | section_index = msdp->pkt->send_buf_index; | |
884 | packet->cp_partial = true; | |
885 | ||
7c3877f2 HZ |
886 | } else if (packet->is_data_pkt && pktlen + net_device->pkt_align < |
887 | net_device->send_section_size) { | |
888 | section_index = netvsc_get_next_send_section(net_device); | |
889 | if (section_index != NETVSC_INVALID_INDEX) { | |
890 | msd_send = msdp->pkt; | |
891 | msdp->pkt = NULL; | |
892 | msdp->count = 0; | |
893 | msd_len = 0; | |
894 | } | |
895 | } | |
896 | ||
897 | if (section_index != NETVSC_INVALID_INDEX) { | |
898 | netvsc_copy_to_send_buf(net_device, | |
899 | section_index, msd_len, | |
900 | packet); | |
b08cc791 | 901 | |
7c3877f2 | 902 | packet->send_buf_index = section_index; |
aa0a34be HZ |
903 | |
904 | if (packet->cp_partial) { | |
905 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
906 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
907 | } else { | |
908 | packet->page_buf_cnt = 0; | |
909 | packet->total_data_buflen += msd_len; | |
aa0a34be | 910 | } |
7c3877f2 | 911 | |
ee90b812 HZ |
912 | if (msdp->pkt) |
913 | netvsc_xmit_completion(msdp->pkt); | |
914 | ||
aa0a34be | 915 | if (packet->xmit_more && !packet->cp_partial) { |
7c3877f2 HZ |
916 | msdp->pkt = packet; |
917 | msdp->count++; | |
918 | } else { | |
919 | cur_send = packet; | |
920 | msdp->pkt = NULL; | |
921 | msdp->count = 0; | |
922 | } | |
923 | } else { | |
924 | msd_send = msdp->pkt; | |
925 | msdp->pkt = NULL; | |
926 | msdp->count = 0; | |
927 | cur_send = packet; | |
928 | } | |
929 | ||
930 | spin_unlock_irqrestore(&msdp->lock, flag); | |
931 | ||
932 | if (msd_send) { | |
933 | m_ret = netvsc_send_pkt(msd_send, net_device); | |
934 | ||
935 | if (m_ret != 0) { | |
936 | netvsc_free_send_slot(net_device, | |
937 | msd_send->send_buf_index); | |
ee90b812 | 938 | netvsc_xmit_completion(msd_send); |
7c3877f2 HZ |
939 | } |
940 | } | |
941 | ||
942 | if (cur_send) | |
943 | ret = netvsc_send_pkt(cur_send, net_device); | |
944 | ||
7aab5159 JS |
945 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
946 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 947 | |
fceaf24a HJ |
948 | return ret; |
949 | } | |
950 | ||
5fa9d3c5 | 951 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 952 | struct vmbus_channel *channel, |
97c1723a | 953 | struct netvsc_device *net_device, |
63f6921d | 954 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
955 | { |
956 | struct nvsp_message recvcompMessage; | |
957 | int retries = 0; | |
958 | int ret; | |
2ddd5e5f | 959 | struct net_device *ndev; |
2ddd5e5f S |
960 | |
961 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
962 | |
963 | recvcompMessage.hdr.msg_type = | |
964 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
965 | ||
63f6921d | 966 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
967 | |
968 | retry_send_cmplt: | |
969 | /* Send the completion */ | |
5b54dac8 | 970 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
971 | sizeof(struct nvsp_message), transaction_id, |
972 | VM_PKT_COMP, 0); | |
973 | if (ret == 0) { | |
974 | /* success */ | |
975 | /* no-op */ | |
d2598f01 | 976 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
977 | /* no more room...wait a bit and attempt to retry 3 times */ |
978 | retries++; | |
d9871158 | 979 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 980 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
981 | |
982 | if (retries < 4) { | |
983 | udelay(100); | |
984 | goto retry_send_cmplt; | |
985 | } else { | |
d9871158 | 986 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 987 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
988 | transaction_id); |
989 | } | |
990 | } else { | |
d9871158 | 991 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 992 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
993 | } |
994 | } | |
995 | ||
97c1723a | 996 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 997 | struct vmbus_channel *channel, |
97c1723a KS |
998 | struct hv_device *device, |
999 | struct vmpacket_descriptor *packet) | |
fceaf24a | 1000 | { |
85799a37 HZ |
1001 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
1002 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
1003 | struct hv_netvsc_packet nv_pkt; |
1004 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
1005 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
1006 | int i; |
1007 | int count = 0; | |
2ddd5e5f | 1008 | struct net_device *ndev; |
779b4d17 | 1009 | |
2ddd5e5f | 1010 | ndev = net_device->ndev; |
fceaf24a | 1011 | |
21a80820 GKH |
1012 | /* |
1013 | * All inbound packets other than send completion should be xfer page | |
1014 | * packet | |
1015 | */ | |
415f2287 | 1016 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 1017 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 1018 | packet->type); |
fceaf24a HJ |
1019 | return; |
1020 | } | |
1021 | ||
85799a37 | 1022 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1023 | (packet->offset8 << 3)); |
fceaf24a | 1024 | |
454f18a9 | 1025 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1026 | if (nvsp_packet->hdr.msg_type != |
1027 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 1028 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 1029 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
1030 | return; |
1031 | } | |
1032 | ||
85799a37 | 1033 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1034 | |
415f2287 | 1035 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 1036 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 1037 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 1038 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
1039 | return; |
1040 | } | |
1041 | ||
4baab261 | 1042 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1043 | |
454f18a9 | 1044 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1045 | for (i = 0; i < count; i++) { |
454f18a9 | 1046 | /* Initialize the netvsc packet */ |
63f6921d | 1047 | netvsc_packet->status = NVSP_STAT_SUCCESS; |
45326342 HZ |
1048 | netvsc_packet->data = (void *)((unsigned long)net_device-> |
1049 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); | |
72a2f5bd | 1050 | netvsc_packet->total_data_buflen = |
415f2287 | 1051 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1052 | |
454f18a9 | 1053 | /* Pass it to the upper layer */ |
25b85ee8 | 1054 | rndis_filter_receive(device, netvsc_packet, channel); |
fceaf24a | 1055 | |
4baab261 HZ |
1056 | if (netvsc_packet->status != NVSP_STAT_SUCCESS) |
1057 | status = NVSP_STAT_FAIL; | |
fceaf24a HJ |
1058 | } |
1059 | ||
4baab261 HZ |
1060 | netvsc_send_recv_completion(device, channel, net_device, |
1061 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
1062 | } |
1063 | ||
5b54dac8 HZ |
1064 | |
1065 | static void netvsc_send_table(struct hv_device *hdev, | |
71790a27 | 1066 | struct nvsp_message *nvmsg) |
5b54dac8 HZ |
1067 | { |
1068 | struct netvsc_device *nvscdev; | |
1069 | struct net_device *ndev; | |
5b54dac8 HZ |
1070 | int i; |
1071 | u32 count, *tab; | |
1072 | ||
1073 | nvscdev = get_outbound_net_device(hdev); | |
1074 | if (!nvscdev) | |
1075 | return; | |
1076 | ndev = nvscdev->ndev; | |
1077 | ||
5b54dac8 HZ |
1078 | count = nvmsg->msg.v5_msg.send_table.count; |
1079 | if (count != VRSS_SEND_TAB_SIZE) { | |
1080 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1081 | return; | |
1082 | } | |
1083 | ||
1084 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1085 | nvmsg->msg.v5_msg.send_table.offset); | |
1086 | ||
1087 | for (i = 0; i < count; i++) | |
1088 | nvscdev->send_table[i] = tab[i]; | |
1089 | } | |
1090 | ||
71790a27 HZ |
1091 | static void netvsc_send_vf(struct netvsc_device *nvdev, |
1092 | struct nvsp_message *nvmsg) | |
1093 | { | |
1094 | nvdev->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; | |
1095 | nvdev->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
1096 | } | |
1097 | ||
1098 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
1099 | struct netvsc_device *nvdev, | |
1100 | struct nvsp_message *nvmsg) | |
1101 | { | |
1102 | switch (nvmsg->hdr.msg_type) { | |
1103 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1104 | netvsc_send_table(hdev, nvmsg); | |
1105 | break; | |
1106 | ||
1107 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
1108 | netvsc_send_vf(nvdev, nvmsg); | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | ||
5b54dac8 | 1113 | void netvsc_channel_cb(void *context) |
fceaf24a | 1114 | { |
21a80820 | 1115 | int ret; |
5b54dac8 HZ |
1116 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
1117 | struct hv_device *device; | |
85799a37 HZ |
1118 | struct netvsc_device *net_device; |
1119 | u32 bytes_recvd; | |
1120 | u64 request_id; | |
8dc0a06a | 1121 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1122 | unsigned char *buffer; |
1123 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1124 | struct net_device *ndev; |
71790a27 | 1125 | struct nvsp_message *nvmsg; |
fceaf24a | 1126 | |
5b54dac8 HZ |
1127 | if (channel->primary_channel != NULL) |
1128 | device = channel->primary_channel->device_obj; | |
1129 | else | |
1130 | device = channel->device_obj; | |
1131 | ||
5a71ae30 | 1132 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1133 | if (!net_device) |
ee0c4c39 | 1134 | return; |
2ddd5e5f | 1135 | ndev = net_device->ndev; |
5b54dac8 | 1136 | buffer = get_per_channel_state(channel); |
fceaf24a | 1137 | |
21a80820 | 1138 | do { |
5b54dac8 | 1139 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1140 | &bytes_recvd, &request_id); |
21a80820 | 1141 | if (ret == 0) { |
85799a37 | 1142 | if (bytes_recvd > 0) { |
21a80820 | 1143 | desc = (struct vmpacket_descriptor *)buffer; |
71790a27 HZ |
1144 | nvmsg = (struct nvsp_message *)((unsigned long) |
1145 | desc + (desc->offset8 << 3)); | |
415f2287 HZ |
1146 | switch (desc->type) { |
1147 | case VM_PKT_COMP: | |
97c1723a | 1148 | netvsc_send_completion(net_device, |
25b85ee8 | 1149 | channel, |
97c1723a | 1150 | device, desc); |
21a80820 GKH |
1151 | break; |
1152 | ||
415f2287 | 1153 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
1154 | netvsc_receive(net_device, channel, |
1155 | device, desc); | |
1156 | break; | |
1157 | ||
1158 | case VM_PKT_DATA_INBAND: | |
71790a27 HZ |
1159 | netvsc_receive_inband(device, |
1160 | net_device, | |
1161 | nvmsg); | |
21a80820 GKH |
1162 | break; |
1163 | ||
1164 | default: | |
d9871158 | 1165 | netdev_err(ndev, |
21a80820 GKH |
1166 | "unhandled packet type %d, " |
1167 | "tid %llx len %d\n", | |
415f2287 | 1168 | desc->type, request_id, |
85799a37 | 1169 | bytes_recvd); |
21a80820 | 1170 | break; |
fceaf24a HJ |
1171 | } |
1172 | ||
21a80820 | 1173 | } else { |
ee0c4c39 KS |
1174 | /* |
1175 | * We are done for this pass. | |
1176 | */ | |
fceaf24a HJ |
1177 | break; |
1178 | } | |
ee0c4c39 | 1179 | |
3d5cad97 | 1180 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1181 | if (bufferlen > NETVSC_PACKET_SIZE) |
1182 | kfree(buffer); | |
21a80820 | 1183 | /* Handle large packet */ |
85799a37 | 1184 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1185 | if (buffer == NULL) { |
454f18a9 | 1186 | /* Try again next time around */ |
d9871158 | 1187 | netdev_err(ndev, |
21a80820 | 1188 | "unable to allocate buffer of size " |
c909ebbd | 1189 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1190 | break; |
1191 | } | |
1192 | ||
85799a37 | 1193 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1194 | } |
1195 | } while (1); | |
1196 | ||
ee0c4c39 KS |
1197 | if (bufferlen > NETVSC_PACKET_SIZE) |
1198 | kfree(buffer); | |
fceaf24a HJ |
1199 | return; |
1200 | } | |
af24ce42 | 1201 | |
b637e023 HZ |
1202 | /* |
1203 | * netvsc_device_add - Callback when the device belonging to this | |
1204 | * driver is added | |
1205 | */ | |
7bd23a4d | 1206 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1207 | { |
1208 | int ret = 0; | |
aae23986 S |
1209 | int ring_size = |
1210 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1211 | struct netvsc_device *net_device; |
2ddd5e5f | 1212 | struct net_device *ndev; |
b637e023 HZ |
1213 | |
1214 | net_device = alloc_net_device(device); | |
b1c84927 DC |
1215 | if (!net_device) |
1216 | return -ENOMEM; | |
b637e023 | 1217 | |
5b54dac8 HZ |
1218 | net_device->ring_size = ring_size; |
1219 | ||
2ddd5e5f S |
1220 | /* |
1221 | * Coming into this function, struct net_device * is | |
1222 | * registered as the driver private data. | |
1223 | * In alloc_net_device(), we register struct netvsc_device * | |
1224 | * as the driver private data and stash away struct net_device * | |
1225 | * in struct netvsc_device *. | |
1226 | */ | |
1227 | ndev = net_device->ndev; | |
1228 | ||
3f300ff4 SX |
1229 | /* Add netvsc_device context to netvsc_device */ |
1230 | net_device->nd_ctx = netdev_priv(ndev); | |
1231 | ||
b637e023 | 1232 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1233 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1234 | |
5b54dac8 HZ |
1235 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1236 | ||
b637e023 | 1237 | /* Open the channel */ |
aae23986 S |
1238 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1239 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1240 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1241 | |
1242 | if (ret != 0) { | |
d9871158 | 1243 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1244 | goto cleanup; |
1245 | } | |
1246 | ||
1247 | /* Channel is opened */ | |
c909ebbd | 1248 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1249 | |
5b54dac8 HZ |
1250 | net_device->chn_table[0] = device->channel; |
1251 | ||
b637e023 HZ |
1252 | /* Connect with the NetVsp */ |
1253 | ret = netvsc_connect_vsp(device); | |
1254 | if (ret != 0) { | |
d9871158 | 1255 | netdev_err(ndev, |
c909ebbd | 1256 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1257 | goto close; |
1258 | } | |
1259 | ||
1260 | return ret; | |
1261 | ||
1262 | close: | |
1263 | /* Now, we can close the channel safely */ | |
1264 | vmbus_close(device->channel); | |
1265 | ||
1266 | cleanup: | |
f90251c8 | 1267 | free_netvsc_device(net_device); |
b637e023 HZ |
1268 | |
1269 | return ret; | |
1270 | } |