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 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); |
fceaf24a | 41 | |
85799a37 HZ |
42 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
43 | if (!net_device) | |
fceaf24a HJ |
44 | return NULL; |
45 | ||
f90251c8 HZ |
46 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
47 | if (!net_device->cb_buffer) { | |
48 | kfree(net_device); | |
49 | return NULL; | |
50 | } | |
51 | ||
dc5cd894 | 52 | init_waitqueue_head(&net_device->wait_drain); |
4d447c9a | 53 | net_device->start_remove = false; |
c38b9c71 | 54 | net_device->destroy = false; |
53d21fdb | 55 | net_device->dev = device; |
2ddd5e5f | 56 | net_device->ndev = ndev; |
7c3877f2 HZ |
57 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
58 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
59 | ||
2ddd5e5f | 60 | hv_set_drvdata(device, net_device); |
85799a37 | 61 | return net_device; |
fceaf24a HJ |
62 | } |
63 | ||
f90251c8 HZ |
64 | static void free_netvsc_device(struct netvsc_device *nvdev) |
65 | { | |
66 | kfree(nvdev->cb_buffer); | |
67 | kfree(nvdev); | |
68 | } | |
69 | ||
5a71ae30 | 70 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 71 | { |
85799a37 | 72 | struct netvsc_device *net_device; |
fceaf24a | 73 | |
2ddd5e5f | 74 | net_device = hv_get_drvdata(device); |
9d88f33a | 75 | if (net_device && net_device->destroy) |
85799a37 | 76 | net_device = NULL; |
fceaf24a | 77 | |
85799a37 | 78 | return net_device; |
fceaf24a HJ |
79 | } |
80 | ||
5a71ae30 | 81 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 82 | { |
85799a37 | 83 | struct netvsc_device *net_device; |
fceaf24a | 84 | |
2ddd5e5f | 85 | net_device = hv_get_drvdata(device); |
9d88f33a S |
86 | |
87 | if (!net_device) | |
88 | goto get_in_err; | |
89 | ||
90 | if (net_device->destroy && | |
91 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 92 | net_device = NULL; |
fceaf24a | 93 | |
9d88f33a | 94 | get_in_err: |
85799a37 | 95 | return net_device; |
fceaf24a HJ |
96 | } |
97 | ||
fceaf24a | 98 | |
c25aaf81 | 99 | static int netvsc_destroy_buf(struct netvsc_device *net_device) |
ec91cd09 HZ |
100 | { |
101 | struct nvsp_message *revoke_packet; | |
102 | int ret = 0; | |
2ddd5e5f | 103 | struct net_device *ndev = net_device->ndev; |
ec91cd09 HZ |
104 | |
105 | /* | |
106 | * If we got a section count, it means we received a | |
107 | * SendReceiveBufferComplete msg (ie sent | |
108 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
109 | * to send a revoke msg here | |
110 | */ | |
111 | if (net_device->recv_section_cnt) { | |
112 | /* Send the revoke receive buffer */ | |
113 | revoke_packet = &net_device->revoke_packet; | |
114 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
115 | ||
116 | revoke_packet->hdr.msg_type = | |
117 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
118 | revoke_packet->msg.v1_msg. | |
119 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
120 | ||
121 | ret = vmbus_sendpacket(net_device->dev->channel, | |
122 | revoke_packet, | |
123 | sizeof(struct nvsp_message), | |
124 | (unsigned long)revoke_packet, | |
125 | VM_PKT_DATA_INBAND, 0); | |
126 | /* | |
127 | * If we failed here, we might as well return and | |
128 | * have a leak rather than continue and a bugchk | |
129 | */ | |
130 | if (ret != 0) { | |
d9871158 | 131 | netdev_err(ndev, "unable to send " |
c909ebbd | 132 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 133 | return ret; |
ec91cd09 HZ |
134 | } |
135 | } | |
136 | ||
137 | /* Teardown the gpadl on the vsp end */ | |
138 | if (net_device->recv_buf_gpadl_handle) { | |
139 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
140 | net_device->recv_buf_gpadl_handle); | |
141 | ||
142 | /* If we failed here, we might as well return and have a leak | |
143 | * rather than continue and a bugchk | |
144 | */ | |
145 | if (ret != 0) { | |
d9871158 | 146 | netdev_err(ndev, |
c909ebbd | 147 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 148 | return ret; |
ec91cd09 HZ |
149 | } |
150 | net_device->recv_buf_gpadl_handle = 0; | |
151 | } | |
152 | ||
153 | if (net_device->recv_buf) { | |
154 | /* Free up the receive buffer */ | |
b679ef73 | 155 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
156 | net_device->recv_buf = NULL; |
157 | } | |
158 | ||
159 | if (net_device->recv_section) { | |
160 | net_device->recv_section_cnt = 0; | |
161 | kfree(net_device->recv_section); | |
162 | net_device->recv_section = NULL; | |
163 | } | |
164 | ||
c25aaf81 KS |
165 | /* Deal with the send buffer we may have setup. |
166 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
167 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
168 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
169 | * to send a revoke msg here |
170 | */ | |
171 | if (net_device->send_section_size) { | |
172 | /* Send the revoke receive buffer */ | |
173 | revoke_packet = &net_device->revoke_packet; | |
174 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
175 | ||
176 | revoke_packet->hdr.msg_type = | |
177 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
178 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
179 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 KS |
180 | |
181 | ret = vmbus_sendpacket(net_device->dev->channel, | |
182 | revoke_packet, | |
183 | sizeof(struct nvsp_message), | |
184 | (unsigned long)revoke_packet, | |
185 | VM_PKT_DATA_INBAND, 0); | |
186 | /* If we failed here, we might as well return and | |
187 | * have a leak rather than continue and a bugchk | |
188 | */ | |
189 | if (ret != 0) { | |
190 | netdev_err(ndev, "unable to send " | |
191 | "revoke send buffer to netvsp\n"); | |
192 | return ret; | |
193 | } | |
194 | } | |
195 | /* Teardown the gpadl on the vsp end */ | |
196 | if (net_device->send_buf_gpadl_handle) { | |
197 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
198 | net_device->send_buf_gpadl_handle); | |
199 | ||
200 | /* If we failed here, we might as well return and have a leak | |
201 | * rather than continue and a bugchk | |
202 | */ | |
203 | if (ret != 0) { | |
204 | netdev_err(ndev, | |
205 | "unable to teardown send buffer's gpadl\n"); | |
206 | return ret; | |
207 | } | |
2f18423d | 208 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
209 | } |
210 | if (net_device->send_buf) { | |
c51ed182 | 211 | /* Free up the send buffer */ |
06b47aac | 212 | vfree(net_device->send_buf); |
c25aaf81 KS |
213 | net_device->send_buf = NULL; |
214 | } | |
215 | kfree(net_device->send_section_map); | |
216 | ||
ec91cd09 HZ |
217 | return ret; |
218 | } | |
219 | ||
c25aaf81 | 220 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 221 | { |
21a80820 | 222 | int ret = 0; |
7390fe9c | 223 | unsigned long t; |
85799a37 HZ |
224 | struct netvsc_device *net_device; |
225 | struct nvsp_message *init_packet; | |
2ddd5e5f | 226 | struct net_device *ndev; |
0a726c2b | 227 | int node; |
fceaf24a | 228 | |
5a71ae30 | 229 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 230 | if (!net_device) |
927bc33c | 231 | return -ENODEV; |
2ddd5e5f | 232 | ndev = net_device->ndev; |
fceaf24a | 233 | |
0a726c2b S |
234 | node = cpu_to_node(device->channel->target_cpu); |
235 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
236 | if (!net_device->recv_buf) | |
237 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
238 | ||
53d21fdb | 239 | if (!net_device->recv_buf) { |
d9871158 | 240 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 241 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 242 | ret = -ENOMEM; |
0c3b7b2f | 243 | goto cleanup; |
fceaf24a | 244 | } |
fceaf24a | 245 | |
454f18a9 BP |
246 | /* |
247 | * Establish the gpadl handle for this buffer on this | |
248 | * channel. Note: This call uses the vmbus connection rather | |
249 | * than the channel to establish the gpadl handle. | |
250 | */ | |
53d21fdb HZ |
251 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
252 | net_device->recv_buf_size, | |
253 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 254 | if (ret != 0) { |
d9871158 | 255 | netdev_err(ndev, |
c909ebbd | 256 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 257 | goto cleanup; |
fceaf24a HJ |
258 | } |
259 | ||
fceaf24a | 260 | |
454f18a9 | 261 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 262 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 263 | |
85799a37 | 264 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 265 | |
53d21fdb HZ |
266 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
267 | init_packet->msg.v1_msg.send_recv_buf. | |
268 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
269 | init_packet->msg.v1_msg. | |
270 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 271 | |
454f18a9 | 272 | /* Send the gpadl notification request */ |
85799a37 | 273 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 274 | sizeof(struct nvsp_message), |
85799a37 | 275 | (unsigned long)init_packet, |
415f2287 | 276 | VM_PKT_DATA_INBAND, |
5a4df290 | 277 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 278 | if (ret != 0) { |
d9871158 | 279 | netdev_err(ndev, |
c909ebbd | 280 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 281 | goto cleanup; |
fceaf24a HJ |
282 | } |
283 | ||
5c5781b3 | 284 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 285 | BUG_ON(t == 0); |
0c3b7b2f | 286 | |
fceaf24a | 287 | |
454f18a9 | 288 | /* Check the response */ |
53d21fdb HZ |
289 | if (init_packet->msg.v1_msg. |
290 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 291 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 292 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
293 | init_packet->msg.v1_msg. |
294 | send_recv_buf_complete.status); | |
927bc33c | 295 | ret = -EINVAL; |
0c3b7b2f | 296 | goto cleanup; |
fceaf24a HJ |
297 | } |
298 | ||
454f18a9 | 299 | /* Parse the response */ |
fceaf24a | 300 | |
53d21fdb HZ |
301 | net_device->recv_section_cnt = init_packet->msg. |
302 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 303 | |
c1813200 HZ |
304 | net_device->recv_section = kmemdup( |
305 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
306 | net_device->recv_section_cnt * | |
307 | sizeof(struct nvsp_1_receive_buffer_section), | |
308 | GFP_KERNEL); | |
53d21fdb | 309 | if (net_device->recv_section == NULL) { |
927bc33c | 310 | ret = -EINVAL; |
0c3b7b2f | 311 | goto cleanup; |
fceaf24a HJ |
312 | } |
313 | ||
21a80820 GKH |
314 | /* |
315 | * For 1st release, there should only be 1 section that represents the | |
316 | * entire receive buffer | |
317 | */ | |
53d21fdb HZ |
318 | if (net_device->recv_section_cnt != 1 || |
319 | net_device->recv_section->offset != 0) { | |
927bc33c | 320 | ret = -EINVAL; |
0c3b7b2f | 321 | goto cleanup; |
fceaf24a HJ |
322 | } |
323 | ||
c25aaf81 KS |
324 | /* Now setup the send buffer. |
325 | */ | |
5defde59 S |
326 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
327 | if (!net_device->send_buf) | |
328 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
329 | if (!net_device->send_buf) { |
330 | netdev_err(ndev, "unable to allocate send " | |
331 | "buffer of size %d\n", net_device->send_buf_size); | |
332 | ret = -ENOMEM; | |
333 | goto cleanup; | |
334 | } | |
335 | ||
336 | /* Establish the gpadl handle for this buffer on this | |
337 | * channel. Note: This call uses the vmbus connection rather | |
338 | * than the channel to establish the gpadl handle. | |
339 | */ | |
340 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
341 | net_device->send_buf_size, | |
342 | &net_device->send_buf_gpadl_handle); | |
343 | if (ret != 0) { | |
344 | netdev_err(ndev, | |
345 | "unable to establish send buffer's gpadl\n"); | |
346 | goto cleanup; | |
347 | } | |
348 | ||
349 | /* Notify the NetVsp of the gpadl handle */ | |
350 | init_packet = &net_device->channel_init_pkt; | |
351 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
352 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 353 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 354 | net_device->send_buf_gpadl_handle; |
c51ed182 | 355 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
356 | |
357 | /* Send the gpadl notification request */ | |
358 | ret = vmbus_sendpacket(device->channel, init_packet, | |
359 | sizeof(struct nvsp_message), | |
360 | (unsigned long)init_packet, | |
361 | VM_PKT_DATA_INBAND, | |
362 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
363 | if (ret != 0) { | |
364 | netdev_err(ndev, | |
365 | "unable to send send buffer's gpadl to netvsp\n"); | |
366 | goto cleanup; | |
367 | } | |
368 | ||
369 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
370 | BUG_ON(t == 0); | |
371 | ||
372 | /* Check the response */ | |
373 | if (init_packet->msg.v1_msg. | |
374 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
375 | netdev_err(ndev, "Unable to complete send buffer " | |
376 | "initialization with NetVsp - status %d\n", | |
377 | init_packet->msg.v1_msg. | |
c51ed182 | 378 | send_send_buf_complete.status); |
c25aaf81 KS |
379 | ret = -EINVAL; |
380 | goto cleanup; | |
381 | } | |
382 | ||
383 | /* Parse the response */ | |
384 | net_device->send_section_size = init_packet->msg. | |
385 | v1_msg.send_send_buf_complete.section_size; | |
386 | ||
387 | /* Section count is simply the size divided by the section size. | |
388 | */ | |
389 | net_device->send_section_cnt = | |
390 | net_device->send_buf_size/net_device->send_section_size; | |
391 | ||
392 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
393 | net_device->send_section_size, net_device->send_section_cnt); | |
394 | ||
395 | /* Setup state for managing the send buffer. */ | |
396 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
397 | BITS_PER_LONG); | |
398 | ||
399 | net_device->send_section_map = | |
400 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
401 | if (net_device->send_section_map == NULL) { |
402 | ret = -ENOMEM; | |
c25aaf81 | 403 | goto cleanup; |
dd1d3f8f | 404 | } |
c25aaf81 | 405 | |
0c3b7b2f | 406 | goto exit; |
fceaf24a | 407 | |
0c3b7b2f | 408 | cleanup: |
c25aaf81 | 409 | netvsc_destroy_buf(net_device); |
fceaf24a | 410 | |
0c3b7b2f | 411 | exit: |
fceaf24a HJ |
412 | return ret; |
413 | } | |
414 | ||
fceaf24a | 415 | |
f157e78d HZ |
416 | /* Negotiate NVSP protocol version */ |
417 | static int negotiate_nvsp_ver(struct hv_device *device, | |
418 | struct netvsc_device *net_device, | |
419 | struct nvsp_message *init_packet, | |
420 | u32 nvsp_ver) | |
fceaf24a | 421 | { |
7390fe9c NMG |
422 | int ret; |
423 | unsigned long t; | |
fceaf24a | 424 | |
85799a37 | 425 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 426 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
427 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
428 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 429 | |
454f18a9 | 430 | /* Send the init request */ |
85799a37 | 431 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 432 | sizeof(struct nvsp_message), |
85799a37 | 433 | (unsigned long)init_packet, |
415f2287 | 434 | VM_PKT_DATA_INBAND, |
5a4df290 | 435 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 436 | |
b8a3d52b | 437 | if (ret != 0) |
f157e78d | 438 | return ret; |
fceaf24a | 439 | |
5c5781b3 | 440 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 441 | |
f157e78d HZ |
442 | if (t == 0) |
443 | return -ETIMEDOUT; | |
fceaf24a | 444 | |
53d21fdb | 445 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
446 | NVSP_STAT_SUCCESS) |
447 | return -EINVAL; | |
fceaf24a | 448 | |
a1eabb01 | 449 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
450 | return 0; |
451 | ||
71790a27 | 452 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
453 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
454 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
4d3c9d37 HZ |
455 | init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu + |
456 | ETH_HLEN; | |
1f5f3a75 | 457 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 458 | |
71790a27 HZ |
459 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) |
460 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; | |
461 | ||
f157e78d HZ |
462 | ret = vmbus_sendpacket(device->channel, init_packet, |
463 | sizeof(struct nvsp_message), | |
464 | (unsigned long)init_packet, | |
465 | VM_PKT_DATA_INBAND, 0); | |
466 | ||
467 | return ret; | |
468 | } | |
469 | ||
470 | static int netvsc_connect_vsp(struct hv_device *device) | |
471 | { | |
472 | int ret; | |
473 | struct netvsc_device *net_device; | |
474 | struct nvsp_message *init_packet; | |
475 | int ndis_version; | |
476 | struct net_device *ndev; | |
a1eabb01 HZ |
477 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
478 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
479 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
480 | |
481 | net_device = get_outbound_net_device(device); | |
482 | if (!net_device) | |
483 | return -ENODEV; | |
484 | ndev = net_device->ndev; | |
485 | ||
486 | init_packet = &net_device->channel_init_pkt; | |
487 | ||
488 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
489 | for (i = num_ver - 1; i >= 0; i--) |
490 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
491 | ver_list[i]) == 0) { | |
492 | net_device->nvsp_version = ver_list[i]; | |
493 | break; | |
494 | } | |
495 | ||
496 | if (i < 0) { | |
0f48c72c | 497 | ret = -EPROTO; |
0c3b7b2f | 498 | goto cleanup; |
fceaf24a | 499 | } |
f157e78d HZ |
500 | |
501 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
502 | ||
454f18a9 | 503 | /* Send the ndis version */ |
85799a37 | 504 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 505 | |
a1eabb01 | 506 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 507 | ndis_version = 0x00060001; |
a1eabb01 HZ |
508 | else |
509 | ndis_version = 0x0006001e; | |
fceaf24a | 510 | |
53d21fdb HZ |
511 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
512 | init_packet->msg.v1_msg. | |
513 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 514 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
515 | init_packet->msg.v1_msg. |
516 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 517 | ndis_version & 0xFFFF; |
fceaf24a | 518 | |
454f18a9 | 519 | /* Send the init request */ |
85799a37 | 520 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
521 | sizeof(struct nvsp_message), |
522 | (unsigned long)init_packet, | |
523 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 524 | if (ret != 0) |
0c3b7b2f | 525 | goto cleanup; |
454f18a9 BP |
526 | |
527 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
528 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
529 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
530 | else | |
531 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 532 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 533 | |
c25aaf81 | 534 | ret = netvsc_init_buf(device); |
fceaf24a | 535 | |
0c3b7b2f | 536 | cleanup: |
fceaf24a HJ |
537 | return ret; |
538 | } | |
539 | ||
648dc598 | 540 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 541 | { |
c25aaf81 | 542 | netvsc_destroy_buf(net_device); |
fceaf24a HJ |
543 | } |
544 | ||
3e189519 | 545 | /* |
5a71ae30 | 546 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 547 | */ |
905620d1 | 548 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 549 | { |
85799a37 | 550 | struct netvsc_device *net_device; |
c38b9c71 | 551 | unsigned long flags; |
fceaf24a | 552 | |
2ddd5e5f | 553 | net_device = hv_get_drvdata(device); |
fceaf24a | 554 | |
648dc598 | 555 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 556 | |
3852409b | 557 | /* |
9d88f33a S |
558 | * Since we have already drained, we don't need to busy wait |
559 | * as was done in final_release_stor_device() | |
560 | * Note that we cannot set the ext pointer to NULL until | |
561 | * we have drained - to drain the outgoing packets, we need to | |
562 | * allow incoming packets. | |
3852409b | 563 | */ |
9d88f33a S |
564 | |
565 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
2ddd5e5f | 566 | hv_set_drvdata(device, NULL); |
9d88f33a | 567 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
3852409b | 568 | |
86c921af S |
569 | /* |
570 | * At this point, no one should be accessing net_device | |
571 | * except in here | |
572 | */ | |
c909ebbd | 573 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 574 | |
454f18a9 | 575 | /* Now, we can close the channel safely */ |
85799a37 | 576 | vmbus_close(device->channel); |
fceaf24a | 577 | |
454f18a9 | 578 | /* Release all resources */ |
aa99c479 | 579 | vfree(net_device->sub_cb_buf); |
f90251c8 | 580 | free_netvsc_device(net_device); |
21a80820 | 581 | return 0; |
fceaf24a HJ |
582 | } |
583 | ||
33be96e4 HZ |
584 | |
585 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
586 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
587 | ||
588 | /* | |
589 | * Get the percentage of available bytes to write in the ring. | |
590 | * The return value is in range from 0 to 100. | |
591 | */ | |
592 | static inline u32 hv_ringbuf_avail_percent( | |
593 | struct hv_ring_buffer_info *ring_info) | |
594 | { | |
595 | u32 avail_read, avail_write; | |
596 | ||
597 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
598 | ||
599 | return avail_write * 100 / ring_info->ring_datasize; | |
600 | } | |
601 | ||
c25aaf81 KS |
602 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
603 | u32 index) | |
604 | { | |
605 | sync_change_bit(index, net_device->send_section_map); | |
606 | } | |
607 | ||
97c1723a | 608 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 609 | struct vmbus_channel *incoming_channel, |
97c1723a | 610 | struct hv_device *device, |
85799a37 | 611 | struct vmpacket_descriptor *packet) |
fceaf24a | 612 | { |
85799a37 HZ |
613 | struct nvsp_message *nvsp_packet; |
614 | struct hv_netvsc_packet *nvsc_packet; | |
2ddd5e5f | 615 | struct net_device *ndev; |
c25aaf81 | 616 | u32 send_index; |
3a3d9a0a | 617 | struct sk_buff *skb; |
fceaf24a | 618 | |
2ddd5e5f | 619 | ndev = net_device->ndev; |
fceaf24a | 620 | |
85799a37 | 621 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 622 | (packet->offset8 << 3)); |
fceaf24a | 623 | |
53d21fdb HZ |
624 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
625 | (nvsp_packet->hdr.msg_type == | |
626 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
627 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
628 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
629 | (nvsp_packet->hdr.msg_type == | |
630 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 631 | /* Copy the response back */ |
53d21fdb | 632 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 633 | sizeof(struct nvsp_message)); |
35abb21a | 634 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
635 | } else if (nvsp_packet->hdr.msg_type == |
636 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 637 | int num_outstanding_sends; |
5b54dac8 HZ |
638 | u16 q_idx = 0; |
639 | struct vmbus_channel *channel = device->channel; | |
640 | int queue_sends; | |
33be96e4 | 641 | |
454f18a9 | 642 | /* Get the send context */ |
3a3d9a0a | 643 | skb = (struct sk_buff *)(unsigned long)packet->trans_id; |
fceaf24a | 644 | |
454f18a9 | 645 | /* Notify the layer above us */ |
3a3d9a0a KS |
646 | if (skb) { |
647 | nvsc_packet = (struct hv_netvsc_packet *) skb->cb; | |
c25aaf81 KS |
648 | send_index = nvsc_packet->send_buf_index; |
649 | if (send_index != NETVSC_INVALID_INDEX) | |
650 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 | 651 | q_idx = nvsc_packet->q_idx; |
25b85ee8 | 652 | channel = incoming_channel; |
3a3d9a0a | 653 | dev_kfree_skb_any(skb); |
5b54dac8 | 654 | } |
fceaf24a | 655 | |
33be96e4 HZ |
656 | num_outstanding_sends = |
657 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
658 | queue_sends = atomic_dec_return(&net_device-> |
659 | queue_sends[q_idx]); | |
1d06825b | 660 | |
dc5cd894 HZ |
661 | if (net_device->destroy && num_outstanding_sends == 0) |
662 | wake_up(&net_device->wait_drain); | |
663 | ||
5b54dac8 HZ |
664 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
665 | !net_device->start_remove && | |
666 | (hv_ringbuf_avail_percent(&channel->outbound) > | |
667 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
668 | netif_tx_wake_queue(netdev_get_tx_queue( | |
669 | ndev, q_idx)); | |
21a80820 | 670 | } else { |
d9871158 | 671 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 672 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
673 | } |
674 | ||
fceaf24a HJ |
675 | } |
676 | ||
c25aaf81 KS |
677 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
678 | { | |
679 | unsigned long index; | |
680 | u32 max_words = net_device->map_words; | |
681 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
682 | u32 section_cnt = net_device->send_section_cnt; | |
683 | int ret_val = NETVSC_INVALID_INDEX; | |
684 | int i; | |
685 | int prev_val; | |
686 | ||
687 | for (i = 0; i < max_words; i++) { | |
688 | if (!~(map_addr[i])) | |
689 | continue; | |
690 | index = ffz(map_addr[i]); | |
691 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
692 | if (prev_val) | |
693 | continue; | |
694 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
695 | break; | |
696 | ret_val = (index + (i * BITS_PER_LONG)); | |
697 | break; | |
698 | } | |
699 | return ret_val; | |
700 | } | |
701 | ||
da19fcd0 LP |
702 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
703 | unsigned int section_index, | |
7c3877f2 | 704 | u32 pend_size, |
24476760 | 705 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 706 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
707 | struct hv_page_buffer **pb, |
708 | struct sk_buff *skb) | |
c25aaf81 KS |
709 | { |
710 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
711 | char *dest = start + (section_index * net_device->send_section_size) |
712 | + pend_size; | |
c25aaf81 | 713 | int i; |
694a9fb0 | 714 | bool is_data_pkt = (skb != NULL) ? true : false; |
bde79be5 | 715 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 716 | u32 msg_size = 0; |
7c3877f2 HZ |
717 | u32 padding = 0; |
718 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
719 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
720 | packet->page_buf_cnt; | |
7c3877f2 HZ |
721 | |
722 | /* Add padding */ | |
bde79be5 | 723 | if (is_data_pkt && xmit_more && remain && |
aa0a34be | 724 | !packet->cp_partial) { |
7c3877f2 | 725 | padding = net_device->pkt_align - remain; |
24476760 | 726 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
727 | packet->total_data_buflen += padding; |
728 | } | |
c25aaf81 | 729 | |
aa0a34be | 730 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
731 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
732 | u32 offset = (*pb)[i].offset; | |
733 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
734 | |
735 | memcpy(dest, (src + offset), len); | |
736 | msg_size += len; | |
737 | dest += len; | |
738 | } | |
7c3877f2 HZ |
739 | |
740 | if (padding) { | |
741 | memset(dest, 0, padding); | |
742 | msg_size += padding; | |
743 | } | |
744 | ||
c25aaf81 KS |
745 | return msg_size; |
746 | } | |
747 | ||
7c3877f2 HZ |
748 | static inline int netvsc_send_pkt( |
749 | struct hv_netvsc_packet *packet, | |
a9f2e2d6 | 750 | struct netvsc_device *net_device, |
3a3d9a0a KS |
751 | struct hv_page_buffer **pb, |
752 | struct sk_buff *skb) | |
fceaf24a | 753 | { |
7c3877f2 | 754 | struct nvsp_message nvmsg; |
3a67c9cc | 755 | u16 q_idx = packet->q_idx; |
8b9fbe1a | 756 | struct vmbus_channel *out_channel = net_device->chn_table[q_idx]; |
7c3877f2 HZ |
757 | struct net_device *ndev = net_device->ndev; |
758 | u64 req_id; | |
759 | int ret; | |
aa0a34be | 760 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 761 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
bde79be5 | 762 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 763 | |
7c3877f2 | 764 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 765 | if (skb != NULL) { |
21a80820 | 766 | /* 0 is RMC_DATA; */ |
7c3877f2 | 767 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
768 | } else { |
769 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 770 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 771 | } |
fceaf24a | 772 | |
7c3877f2 HZ |
773 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
774 | packet->send_buf_index; | |
775 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
776 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
777 | else | |
778 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
779 | packet->total_data_buflen; | |
21a80820 | 780 | |
3a3d9a0a | 781 | req_id = (ulong)skb; |
f1ea3cd7 | 782 | |
c3582a2c HZ |
783 | if (out_channel->rescind) |
784 | return -ENODEV; | |
785 | ||
82fa3c77 KS |
786 | /* |
787 | * It is possible that once we successfully place this packet | |
788 | * on the ringbuffer, we may stop the queue. In that case, we want | |
789 | * to notify the host independent of the xmit_more flag. We don't | |
790 | * need to be precise here; in the worst case we may signal the host | |
791 | * unnecessarily. | |
792 | */ | |
793 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) | |
bde79be5 | 794 | xmit_more = false; |
82fa3c77 | 795 | |
72a2f5bd | 796 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
797 | pgbuf = packet->cp_partial ? (*pb) + |
798 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
799 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
800 | pgbuf, | |
801 | packet->page_buf_cnt, | |
802 | &nvmsg, | |
803 | sizeof(struct nvsp_message), | |
804 | req_id, | |
805 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 806 | !xmit_more); |
21a80820 | 807 | } else { |
82fa3c77 KS |
808 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
809 | sizeof(struct nvsp_message), | |
810 | req_id, | |
811 | VM_PKT_DATA_INBAND, | |
812 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 813 | !xmit_more); |
fceaf24a HJ |
814 | } |
815 | ||
1d06825b HZ |
816 | if (ret == 0) { |
817 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 818 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 | 819 | |
82fa3c77 KS |
820 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
821 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); | |
5b54dac8 | 822 | |
33be96e4 | 823 | if (atomic_read(&net_device-> |
3a67c9cc | 824 | queue_sends[q_idx]) < 1) |
5b54dac8 | 825 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 826 | ndev, q_idx)); |
33be96e4 | 827 | } |
1d06825b | 828 | } else if (ret == -EAGAIN) { |
5b54dac8 | 829 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
830 | ndev, q_idx)); |
831 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 832 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 833 | ndev, q_idx)); |
33be96e4 HZ |
834 | ret = -ENOSPC; |
835 | } | |
1d06825b | 836 | } else { |
d9871158 | 837 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 838 | packet, ret); |
1d06825b | 839 | } |
fceaf24a | 840 | |
7c3877f2 HZ |
841 | return ret; |
842 | } | |
843 | ||
c85e4924 HZ |
844 | /* Move packet out of multi send data (msd), and clear msd */ |
845 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
846 | struct sk_buff **msd_skb, | |
847 | struct multi_send_data *msdp) | |
848 | { | |
849 | *msd_skb = msdp->skb; | |
850 | *msd_send = msdp->pkt; | |
851 | msdp->skb = NULL; | |
852 | msdp->pkt = NULL; | |
853 | msdp->count = 0; | |
854 | } | |
855 | ||
7c3877f2 | 856 | int netvsc_send(struct hv_device *device, |
24476760 | 857 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 858 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
859 | struct hv_page_buffer **pb, |
860 | struct sk_buff *skb) | |
7c3877f2 HZ |
861 | { |
862 | struct netvsc_device *net_device; | |
863 | int ret = 0, m_ret = 0; | |
864 | struct vmbus_channel *out_channel; | |
865 | u16 q_idx = packet->q_idx; | |
866 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
867 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
868 | struct multi_send_data *msdp; |
869 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 870 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 871 | bool try_batch; |
bde79be5 | 872 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
873 | |
874 | net_device = get_outbound_net_device(device); | |
875 | if (!net_device) | |
876 | return -ENODEV; | |
877 | ||
8b9fbe1a | 878 | out_channel = net_device->chn_table[q_idx]; |
25b85ee8 | 879 | |
7c3877f2 | 880 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 881 | packet->cp_partial = false; |
7c3877f2 | 882 | |
cf8190e4 HZ |
883 | /* Send control message directly without accessing msd (Multi-Send |
884 | * Data) field which may be changed during data packet processing. | |
885 | */ | |
886 | if (!skb) { | |
887 | cur_send = packet; | |
888 | goto send_now; | |
889 | } | |
890 | ||
7c3877f2 HZ |
891 | msdp = &net_device->msd[q_idx]; |
892 | ||
893 | /* batch packets in send buffer if possible */ | |
7c3877f2 HZ |
894 | if (msdp->pkt) |
895 | msd_len = msdp->pkt->total_data_buflen; | |
896 | ||
694a9fb0 | 897 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
aa0a34be HZ |
898 | net_device->max_pkt; |
899 | ||
900 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
901 | net_device->send_section_size) { |
902 | section_index = msdp->pkt->send_buf_index; | |
903 | ||
aa0a34be HZ |
904 | } else if (try_batch && msd_len + packet->rmsg_size < |
905 | net_device->send_section_size) { | |
906 | section_index = msdp->pkt->send_buf_index; | |
907 | packet->cp_partial = true; | |
908 | ||
694a9fb0 | 909 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
7c3877f2 HZ |
910 | net_device->send_section_size) { |
911 | section_index = netvsc_get_next_send_section(net_device); | |
912 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
913 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
914 | msd_len = 0; | |
7c3877f2 HZ |
915 | } |
916 | } | |
917 | ||
918 | if (section_index != NETVSC_INVALID_INDEX) { | |
919 | netvsc_copy_to_send_buf(net_device, | |
920 | section_index, msd_len, | |
694a9fb0 | 921 | packet, rndis_msg, pb, skb); |
b08cc791 | 922 | |
7c3877f2 | 923 | packet->send_buf_index = section_index; |
aa0a34be HZ |
924 | |
925 | if (packet->cp_partial) { | |
926 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
927 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
928 | } else { | |
929 | packet->page_buf_cnt = 0; | |
930 | packet->total_data_buflen += msd_len; | |
aa0a34be | 931 | } |
7c3877f2 | 932 | |
c85e4924 HZ |
933 | if (msdp->skb) |
934 | dev_kfree_skb_any(msdp->skb); | |
ee90b812 | 935 | |
bde79be5 | 936 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 937 | msdp->skb = skb; |
7c3877f2 HZ |
938 | msdp->pkt = packet; |
939 | msdp->count++; | |
940 | } else { | |
941 | cur_send = packet; | |
c85e4924 | 942 | msdp->skb = NULL; |
7c3877f2 HZ |
943 | msdp->pkt = NULL; |
944 | msdp->count = 0; | |
945 | } | |
946 | } else { | |
c85e4924 | 947 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
948 | cur_send = packet; |
949 | } | |
950 | ||
7c3877f2 | 951 | if (msd_send) { |
c85e4924 | 952 | m_ret = netvsc_send_pkt(msd_send, net_device, NULL, msd_skb); |
7c3877f2 HZ |
953 | |
954 | if (m_ret != 0) { | |
955 | netvsc_free_send_slot(net_device, | |
956 | msd_send->send_buf_index); | |
c85e4924 | 957 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
958 | } |
959 | } | |
960 | ||
cf8190e4 | 961 | send_now: |
7c3877f2 | 962 | if (cur_send) |
3a3d9a0a | 963 | ret = netvsc_send_pkt(cur_send, net_device, pb, skb); |
7c3877f2 | 964 | |
7aab5159 JS |
965 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
966 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 967 | |
fceaf24a HJ |
968 | return ret; |
969 | } | |
970 | ||
5fa9d3c5 | 971 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 972 | struct vmbus_channel *channel, |
97c1723a | 973 | struct netvsc_device *net_device, |
63f6921d | 974 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
975 | { |
976 | struct nvsp_message recvcompMessage; | |
977 | int retries = 0; | |
978 | int ret; | |
2ddd5e5f | 979 | struct net_device *ndev; |
2ddd5e5f S |
980 | |
981 | ndev = net_device->ndev; | |
5fa9d3c5 HZ |
982 | |
983 | recvcompMessage.hdr.msg_type = | |
984 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
985 | ||
63f6921d | 986 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
987 | |
988 | retry_send_cmplt: | |
989 | /* Send the completion */ | |
5b54dac8 | 990 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
991 | sizeof(struct nvsp_message), transaction_id, |
992 | VM_PKT_COMP, 0); | |
993 | if (ret == 0) { | |
994 | /* success */ | |
995 | /* no-op */ | |
d2598f01 | 996 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
997 | /* no more room...wait a bit and attempt to retry 3 times */ |
998 | retries++; | |
d9871158 | 999 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 1000 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
1001 | |
1002 | if (retries < 4) { | |
1003 | udelay(100); | |
1004 | goto retry_send_cmplt; | |
1005 | } else { | |
d9871158 | 1006 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1007 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
1008 | transaction_id); |
1009 | } | |
1010 | } else { | |
d9871158 | 1011 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1012 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
1013 | } |
1014 | } | |
1015 | ||
97c1723a | 1016 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 1017 | struct vmbus_channel *channel, |
97c1723a KS |
1018 | struct hv_device *device, |
1019 | struct vmpacket_descriptor *packet) | |
fceaf24a | 1020 | { |
85799a37 HZ |
1021 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
1022 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
1023 | struct hv_netvsc_packet nv_pkt; |
1024 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
1025 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
1026 | int i; |
1027 | int count = 0; | |
2ddd5e5f | 1028 | struct net_device *ndev; |
c4b20c63 | 1029 | void *data; |
779b4d17 | 1030 | |
2ddd5e5f | 1031 | ndev = net_device->ndev; |
fceaf24a | 1032 | |
21a80820 GKH |
1033 | /* |
1034 | * All inbound packets other than send completion should be xfer page | |
1035 | * packet | |
1036 | */ | |
415f2287 | 1037 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 1038 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 1039 | packet->type); |
fceaf24a HJ |
1040 | return; |
1041 | } | |
1042 | ||
85799a37 | 1043 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1044 | (packet->offset8 << 3)); |
fceaf24a | 1045 | |
454f18a9 | 1046 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1047 | if (nvsp_packet->hdr.msg_type != |
1048 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 1049 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 1050 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
1051 | return; |
1052 | } | |
1053 | ||
85799a37 | 1054 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1055 | |
415f2287 | 1056 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 1057 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 1058 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 1059 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
1060 | return; |
1061 | } | |
1062 | ||
4baab261 | 1063 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1064 | |
454f18a9 | 1065 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1066 | for (i = 0; i < count; i++) { |
454f18a9 | 1067 | /* Initialize the netvsc packet */ |
c4b20c63 | 1068 | data = (void *)((unsigned long)net_device-> |
45326342 | 1069 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); |
72a2f5bd | 1070 | netvsc_packet->total_data_buflen = |
415f2287 | 1071 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1072 | |
454f18a9 | 1073 | /* Pass it to the upper layer */ |
10082f98 KS |
1074 | status = rndis_filter_receive(device, netvsc_packet, &data, |
1075 | channel); | |
fceaf24a | 1076 | |
fceaf24a HJ |
1077 | } |
1078 | ||
4baab261 HZ |
1079 | netvsc_send_recv_completion(device, channel, net_device, |
1080 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
1081 | } |
1082 | ||
5b54dac8 HZ |
1083 | |
1084 | static void netvsc_send_table(struct hv_device *hdev, | |
71790a27 | 1085 | struct nvsp_message *nvmsg) |
5b54dac8 HZ |
1086 | { |
1087 | struct netvsc_device *nvscdev; | |
1088 | struct net_device *ndev; | |
5b54dac8 HZ |
1089 | int i; |
1090 | u32 count, *tab; | |
1091 | ||
1092 | nvscdev = get_outbound_net_device(hdev); | |
1093 | if (!nvscdev) | |
1094 | return; | |
1095 | ndev = nvscdev->ndev; | |
1096 | ||
5b54dac8 HZ |
1097 | count = nvmsg->msg.v5_msg.send_table.count; |
1098 | if (count != VRSS_SEND_TAB_SIZE) { | |
1099 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1100 | return; | |
1101 | } | |
1102 | ||
1103 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1104 | nvmsg->msg.v5_msg.send_table.offset); | |
1105 | ||
1106 | for (i = 0; i < count; i++) | |
1107 | nvscdev->send_table[i] = tab[i]; | |
1108 | } | |
1109 | ||
71790a27 HZ |
1110 | static void netvsc_send_vf(struct netvsc_device *nvdev, |
1111 | struct nvsp_message *nvmsg) | |
1112 | { | |
1113 | nvdev->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; | |
1114 | nvdev->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
1115 | } | |
1116 | ||
1117 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
1118 | struct netvsc_device *nvdev, | |
1119 | struct nvsp_message *nvmsg) | |
1120 | { | |
1121 | switch (nvmsg->hdr.msg_type) { | |
1122 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1123 | netvsc_send_table(hdev, nvmsg); | |
1124 | break; | |
1125 | ||
1126 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
1127 | netvsc_send_vf(nvdev, nvmsg); | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
5b54dac8 | 1132 | void netvsc_channel_cb(void *context) |
fceaf24a | 1133 | { |
21a80820 | 1134 | int ret; |
5b54dac8 HZ |
1135 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
1136 | struct hv_device *device; | |
85799a37 HZ |
1137 | struct netvsc_device *net_device; |
1138 | u32 bytes_recvd; | |
1139 | u64 request_id; | |
8dc0a06a | 1140 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1141 | unsigned char *buffer; |
1142 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1143 | struct net_device *ndev; |
71790a27 | 1144 | struct nvsp_message *nvmsg; |
fceaf24a | 1145 | |
5b54dac8 HZ |
1146 | if (channel->primary_channel != NULL) |
1147 | device = channel->primary_channel->device_obj; | |
1148 | else | |
1149 | device = channel->device_obj; | |
1150 | ||
5a71ae30 | 1151 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1152 | if (!net_device) |
ee0c4c39 | 1153 | return; |
2ddd5e5f | 1154 | ndev = net_device->ndev; |
5b54dac8 | 1155 | buffer = get_per_channel_state(channel); |
fceaf24a | 1156 | |
21a80820 | 1157 | do { |
5b54dac8 | 1158 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1159 | &bytes_recvd, &request_id); |
21a80820 | 1160 | if (ret == 0) { |
85799a37 | 1161 | if (bytes_recvd > 0) { |
21a80820 | 1162 | desc = (struct vmpacket_descriptor *)buffer; |
71790a27 HZ |
1163 | nvmsg = (struct nvsp_message *)((unsigned long) |
1164 | desc + (desc->offset8 << 3)); | |
415f2287 HZ |
1165 | switch (desc->type) { |
1166 | case VM_PKT_COMP: | |
97c1723a | 1167 | netvsc_send_completion(net_device, |
25b85ee8 | 1168 | channel, |
97c1723a | 1169 | device, desc); |
21a80820 GKH |
1170 | break; |
1171 | ||
415f2287 | 1172 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
1173 | netvsc_receive(net_device, channel, |
1174 | device, desc); | |
1175 | break; | |
1176 | ||
1177 | case VM_PKT_DATA_INBAND: | |
71790a27 HZ |
1178 | netvsc_receive_inband(device, |
1179 | net_device, | |
1180 | nvmsg); | |
21a80820 GKH |
1181 | break; |
1182 | ||
1183 | default: | |
d9871158 | 1184 | netdev_err(ndev, |
21a80820 GKH |
1185 | "unhandled packet type %d, " |
1186 | "tid %llx len %d\n", | |
415f2287 | 1187 | desc->type, request_id, |
85799a37 | 1188 | bytes_recvd); |
21a80820 | 1189 | break; |
fceaf24a HJ |
1190 | } |
1191 | ||
21a80820 | 1192 | } else { |
ee0c4c39 KS |
1193 | /* |
1194 | * We are done for this pass. | |
1195 | */ | |
fceaf24a HJ |
1196 | break; |
1197 | } | |
ee0c4c39 | 1198 | |
3d5cad97 | 1199 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1200 | if (bufferlen > NETVSC_PACKET_SIZE) |
1201 | kfree(buffer); | |
21a80820 | 1202 | /* Handle large packet */ |
85799a37 | 1203 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1204 | if (buffer == NULL) { |
454f18a9 | 1205 | /* Try again next time around */ |
d9871158 | 1206 | netdev_err(ndev, |
21a80820 | 1207 | "unable to allocate buffer of size " |
c909ebbd | 1208 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1209 | break; |
1210 | } | |
1211 | ||
85799a37 | 1212 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1213 | } |
1214 | } while (1); | |
1215 | ||
ee0c4c39 KS |
1216 | if (bufferlen > NETVSC_PACKET_SIZE) |
1217 | kfree(buffer); | |
fceaf24a HJ |
1218 | return; |
1219 | } | |
af24ce42 | 1220 | |
b637e023 HZ |
1221 | /* |
1222 | * netvsc_device_add - Callback when the device belonging to this | |
1223 | * driver is added | |
1224 | */ | |
7bd23a4d | 1225 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
1226 | { |
1227 | int ret = 0; | |
aae23986 S |
1228 | int ring_size = |
1229 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1230 | struct netvsc_device *net_device; |
2ddd5e5f | 1231 | struct net_device *ndev; |
b637e023 HZ |
1232 | |
1233 | net_device = alloc_net_device(device); | |
b1c84927 DC |
1234 | if (!net_device) |
1235 | return -ENOMEM; | |
b637e023 | 1236 | |
5b54dac8 HZ |
1237 | net_device->ring_size = ring_size; |
1238 | ||
2ddd5e5f S |
1239 | /* |
1240 | * Coming into this function, struct net_device * is | |
1241 | * registered as the driver private data. | |
1242 | * In alloc_net_device(), we register struct netvsc_device * | |
1243 | * as the driver private data and stash away struct net_device * | |
1244 | * in struct netvsc_device *. | |
1245 | */ | |
1246 | ndev = net_device->ndev; | |
1247 | ||
3f300ff4 SX |
1248 | /* Add netvsc_device context to netvsc_device */ |
1249 | net_device->nd_ctx = netdev_priv(ndev); | |
1250 | ||
b637e023 | 1251 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1252 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1253 | |
5b54dac8 HZ |
1254 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1255 | ||
b637e023 | 1256 | /* Open the channel */ |
aae23986 S |
1257 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1258 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1259 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1260 | |
1261 | if (ret != 0) { | |
d9871158 | 1262 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1263 | goto cleanup; |
1264 | } | |
1265 | ||
1266 | /* Channel is opened */ | |
c909ebbd | 1267 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1268 | |
5b54dac8 HZ |
1269 | net_device->chn_table[0] = device->channel; |
1270 | ||
b637e023 HZ |
1271 | /* Connect with the NetVsp */ |
1272 | ret = netvsc_connect_vsp(device); | |
1273 | if (ret != 0) { | |
d9871158 | 1274 | netdev_err(ndev, |
c909ebbd | 1275 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1276 | goto close; |
1277 | } | |
1278 | ||
1279 | return ret; | |
1280 | ||
1281 | close: | |
1282 | /* Now, we can close the channel safely */ | |
1283 | vmbus_close(device->channel); | |
1284 | ||
1285 | cleanup: | |
f90251c8 | 1286 | free_netvsc_device(net_device); |
b637e023 HZ |
1287 | |
1288 | return ret; | |
1289 | } |