Commit | Line | Data |
---|---|---|
fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
5654e932 | 22 | #include <linux/kernel.h> |
0c3b7b2f S |
23 | #include <linux/sched.h> |
24 | #include <linux/wait.h> | |
0ffa63b0 | 25 | #include <linux/mm.h> |
b4362c9c | 26 | #include <linux/delay.h> |
21a80820 | 27 | #include <linux/io.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
d9871158 | 29 | #include <linux/netdevice.h> |
f157e78d | 30 | #include <linux/if_ether.h> |
d6472302 | 31 | #include <linux/vmalloc.h> |
c25aaf81 | 32 | #include <asm/sync_bitops.h> |
3f335ea2 | 33 | |
5ca7252a | 34 | #include "hyperv_net.h" |
fceaf24a | 35 | |
84bf9cef KS |
36 | /* |
37 | * Switch the data path from the synthetic interface to the VF | |
38 | * interface. | |
39 | */ | |
0a1275ca | 40 | void netvsc_switch_datapath(struct net_device *ndev, bool vf) |
84bf9cef | 41 | { |
3d541ac5 VK |
42 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
43 | struct hv_device *dev = net_device_ctx->device_ctx; | |
0a1275ca VK |
44 | struct netvsc_device *nv_dev = net_device_ctx->nvdev; |
45 | struct nvsp_message *init_pkt = &nv_dev->channel_init_pkt; | |
84bf9cef KS |
46 | |
47 | memset(init_pkt, 0, sizeof(struct nvsp_message)); | |
48 | init_pkt->hdr.msg_type = NVSP_MSG4_TYPE_SWITCH_DATA_PATH; | |
49 | if (vf) | |
50 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
51 | NVSP_DATAPATH_VF; | |
52 | else | |
53 | init_pkt->msg.v4_msg.active_dp.active_datapath = | |
54 | NVSP_DATAPATH_SYNTHETIC; | |
55 | ||
56 | vmbus_sendpacket(dev->channel, init_pkt, | |
57 | sizeof(struct nvsp_message), | |
58 | (unsigned long)init_pkt, | |
59 | VM_PKT_DATA_INBAND, 0); | |
60 | } | |
61 | ||
fceaf24a | 62 | |
88098834 | 63 | static struct netvsc_device *alloc_net_device(void) |
fceaf24a | 64 | { |
85799a37 | 65 | struct netvsc_device *net_device; |
fceaf24a | 66 | |
85799a37 HZ |
67 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
68 | if (!net_device) | |
fceaf24a HJ |
69 | return NULL; |
70 | ||
f90251c8 HZ |
71 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
72 | if (!net_device->cb_buffer) { | |
73 | kfree(net_device); | |
74 | return NULL; | |
75 | } | |
76 | ||
dc5cd894 | 77 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 78 | net_device->destroy = false; |
84bf9cef KS |
79 | atomic_set(&net_device->open_cnt, 0); |
80 | atomic_set(&net_device->vf_use_cnt, 0); | |
7c3877f2 HZ |
81 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
82 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
83 | ||
84bf9cef KS |
84 | net_device->vf_netdev = NULL; |
85 | net_device->vf_inject = false; | |
86 | ||
85799a37 | 87 | return net_device; |
fceaf24a HJ |
88 | } |
89 | ||
f90251c8 HZ |
90 | static void free_netvsc_device(struct netvsc_device *nvdev) |
91 | { | |
92 | kfree(nvdev->cb_buffer); | |
93 | kfree(nvdev); | |
94 | } | |
95 | ||
5a71ae30 | 96 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 97 | { |
3d541ac5 VK |
98 | struct net_device *ndev = hv_get_drvdata(device); |
99 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
100 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
fceaf24a | 101 | |
9d88f33a | 102 | if (net_device && net_device->destroy) |
85799a37 | 103 | net_device = NULL; |
fceaf24a | 104 | |
85799a37 | 105 | return net_device; |
fceaf24a HJ |
106 | } |
107 | ||
5a71ae30 | 108 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 109 | { |
3d541ac5 VK |
110 | struct net_device *ndev = hv_get_drvdata(device); |
111 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
112 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
9d88f33a S |
113 | |
114 | if (!net_device) | |
115 | goto get_in_err; | |
116 | ||
117 | if (net_device->destroy && | |
118 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 119 | net_device = NULL; |
fceaf24a | 120 | |
9d88f33a | 121 | get_in_err: |
85799a37 | 122 | return net_device; |
fceaf24a HJ |
123 | } |
124 | ||
fceaf24a | 125 | |
3d541ac5 | 126 | static int netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
127 | { |
128 | struct nvsp_message *revoke_packet; | |
129 | int ret = 0; | |
3d541ac5 VK |
130 | struct net_device *ndev = hv_get_drvdata(device); |
131 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
132 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
ec91cd09 HZ |
133 | |
134 | /* | |
135 | * If we got a section count, it means we received a | |
136 | * SendReceiveBufferComplete msg (ie sent | |
137 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
138 | * to send a revoke msg here | |
139 | */ | |
140 | if (net_device->recv_section_cnt) { | |
141 | /* Send the revoke receive buffer */ | |
142 | revoke_packet = &net_device->revoke_packet; | |
143 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
144 | ||
145 | revoke_packet->hdr.msg_type = | |
146 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
147 | revoke_packet->msg.v1_msg. | |
148 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
149 | ||
3d541ac5 | 150 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
151 | revoke_packet, |
152 | sizeof(struct nvsp_message), | |
153 | (unsigned long)revoke_packet, | |
154 | VM_PKT_DATA_INBAND, 0); | |
155 | /* | |
156 | * If we failed here, we might as well return and | |
157 | * have a leak rather than continue and a bugchk | |
158 | */ | |
159 | if (ret != 0) { | |
d9871158 | 160 | netdev_err(ndev, "unable to send " |
c909ebbd | 161 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 162 | return ret; |
ec91cd09 HZ |
163 | } |
164 | } | |
165 | ||
166 | /* Teardown the gpadl on the vsp end */ | |
167 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
168 | ret = vmbus_teardown_gpadl(device->channel, |
169 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
170 | |
171 | /* If we failed here, we might as well return and have a leak | |
172 | * rather than continue and a bugchk | |
173 | */ | |
174 | if (ret != 0) { | |
d9871158 | 175 | netdev_err(ndev, |
c909ebbd | 176 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 177 | return ret; |
ec91cd09 HZ |
178 | } |
179 | net_device->recv_buf_gpadl_handle = 0; | |
180 | } | |
181 | ||
182 | if (net_device->recv_buf) { | |
183 | /* Free up the receive buffer */ | |
b679ef73 | 184 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
185 | net_device->recv_buf = NULL; |
186 | } | |
187 | ||
188 | if (net_device->recv_section) { | |
189 | net_device->recv_section_cnt = 0; | |
190 | kfree(net_device->recv_section); | |
191 | net_device->recv_section = NULL; | |
192 | } | |
193 | ||
c25aaf81 KS |
194 | /* Deal with the send buffer we may have setup. |
195 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
196 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
197 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
198 | * to send a revoke msg here |
199 | */ | |
200 | if (net_device->send_section_size) { | |
201 | /* Send the revoke receive buffer */ | |
202 | revoke_packet = &net_device->revoke_packet; | |
203 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
204 | ||
205 | revoke_packet->hdr.msg_type = | |
206 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
207 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
208 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 209 | |
3d541ac5 | 210 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
211 | revoke_packet, |
212 | sizeof(struct nvsp_message), | |
213 | (unsigned long)revoke_packet, | |
214 | VM_PKT_DATA_INBAND, 0); | |
215 | /* If we failed here, we might as well return and | |
216 | * have a leak rather than continue and a bugchk | |
217 | */ | |
218 | if (ret != 0) { | |
219 | netdev_err(ndev, "unable to send " | |
220 | "revoke send buffer to netvsp\n"); | |
221 | return ret; | |
222 | } | |
223 | } | |
224 | /* Teardown the gpadl on the vsp end */ | |
225 | if (net_device->send_buf_gpadl_handle) { | |
3d541ac5 | 226 | ret = vmbus_teardown_gpadl(device->channel, |
c25aaf81 KS |
227 | net_device->send_buf_gpadl_handle); |
228 | ||
229 | /* If we failed here, we might as well return and have a leak | |
230 | * rather than continue and a bugchk | |
231 | */ | |
232 | if (ret != 0) { | |
233 | netdev_err(ndev, | |
234 | "unable to teardown send buffer's gpadl\n"); | |
235 | return ret; | |
236 | } | |
2f18423d | 237 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
238 | } |
239 | if (net_device->send_buf) { | |
c51ed182 | 240 | /* Free up the send buffer */ |
06b47aac | 241 | vfree(net_device->send_buf); |
c25aaf81 KS |
242 | net_device->send_buf = NULL; |
243 | } | |
244 | kfree(net_device->send_section_map); | |
245 | ||
ec91cd09 HZ |
246 | return ret; |
247 | } | |
248 | ||
c25aaf81 | 249 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 250 | { |
21a80820 | 251 | int ret = 0; |
7390fe9c | 252 | unsigned long t; |
85799a37 HZ |
253 | struct netvsc_device *net_device; |
254 | struct nvsp_message *init_packet; | |
2ddd5e5f | 255 | struct net_device *ndev; |
0a726c2b | 256 | int node; |
fceaf24a | 257 | |
5a71ae30 | 258 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 259 | if (!net_device) |
927bc33c | 260 | return -ENODEV; |
0a1275ca | 261 | ndev = hv_get_drvdata(device); |
fceaf24a | 262 | |
0a726c2b S |
263 | node = cpu_to_node(device->channel->target_cpu); |
264 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
265 | if (!net_device->recv_buf) | |
266 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
267 | ||
53d21fdb | 268 | if (!net_device->recv_buf) { |
d9871158 | 269 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 270 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 271 | ret = -ENOMEM; |
0c3b7b2f | 272 | goto cleanup; |
fceaf24a | 273 | } |
fceaf24a | 274 | |
454f18a9 BP |
275 | /* |
276 | * Establish the gpadl handle for this buffer on this | |
277 | * channel. Note: This call uses the vmbus connection rather | |
278 | * than the channel to establish the gpadl handle. | |
279 | */ | |
53d21fdb HZ |
280 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
281 | net_device->recv_buf_size, | |
282 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 283 | if (ret != 0) { |
d9871158 | 284 | netdev_err(ndev, |
c909ebbd | 285 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 286 | goto cleanup; |
fceaf24a HJ |
287 | } |
288 | ||
fceaf24a | 289 | |
454f18a9 | 290 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 291 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 292 | |
85799a37 | 293 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 294 | |
53d21fdb HZ |
295 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
296 | init_packet->msg.v1_msg.send_recv_buf. | |
297 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
298 | init_packet->msg.v1_msg. | |
299 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 300 | |
454f18a9 | 301 | /* Send the gpadl notification request */ |
85799a37 | 302 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 303 | sizeof(struct nvsp_message), |
85799a37 | 304 | (unsigned long)init_packet, |
415f2287 | 305 | VM_PKT_DATA_INBAND, |
5a4df290 | 306 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 307 | if (ret != 0) { |
d9871158 | 308 | netdev_err(ndev, |
c909ebbd | 309 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 310 | goto cleanup; |
fceaf24a HJ |
311 | } |
312 | ||
5c5781b3 | 313 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 314 | BUG_ON(t == 0); |
0c3b7b2f | 315 | |
fceaf24a | 316 | |
454f18a9 | 317 | /* Check the response */ |
53d21fdb HZ |
318 | if (init_packet->msg.v1_msg. |
319 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 320 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 321 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
322 | init_packet->msg.v1_msg. |
323 | send_recv_buf_complete.status); | |
927bc33c | 324 | ret = -EINVAL; |
0c3b7b2f | 325 | goto cleanup; |
fceaf24a HJ |
326 | } |
327 | ||
454f18a9 | 328 | /* Parse the response */ |
fceaf24a | 329 | |
53d21fdb HZ |
330 | net_device->recv_section_cnt = init_packet->msg. |
331 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 332 | |
c1813200 HZ |
333 | net_device->recv_section = kmemdup( |
334 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
335 | net_device->recv_section_cnt * | |
336 | sizeof(struct nvsp_1_receive_buffer_section), | |
337 | GFP_KERNEL); | |
53d21fdb | 338 | if (net_device->recv_section == NULL) { |
927bc33c | 339 | ret = -EINVAL; |
0c3b7b2f | 340 | goto cleanup; |
fceaf24a HJ |
341 | } |
342 | ||
21a80820 GKH |
343 | /* |
344 | * For 1st release, there should only be 1 section that represents the | |
345 | * entire receive buffer | |
346 | */ | |
53d21fdb HZ |
347 | if (net_device->recv_section_cnt != 1 || |
348 | net_device->recv_section->offset != 0) { | |
927bc33c | 349 | ret = -EINVAL; |
0c3b7b2f | 350 | goto cleanup; |
fceaf24a HJ |
351 | } |
352 | ||
c25aaf81 KS |
353 | /* Now setup the send buffer. |
354 | */ | |
5defde59 S |
355 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
356 | if (!net_device->send_buf) | |
357 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
358 | if (!net_device->send_buf) { |
359 | netdev_err(ndev, "unable to allocate send " | |
360 | "buffer of size %d\n", net_device->send_buf_size); | |
361 | ret = -ENOMEM; | |
362 | goto cleanup; | |
363 | } | |
364 | ||
365 | /* Establish the gpadl handle for this buffer on this | |
366 | * channel. Note: This call uses the vmbus connection rather | |
367 | * than the channel to establish the gpadl handle. | |
368 | */ | |
369 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
370 | net_device->send_buf_size, | |
371 | &net_device->send_buf_gpadl_handle); | |
372 | if (ret != 0) { | |
373 | netdev_err(ndev, | |
374 | "unable to establish send buffer's gpadl\n"); | |
375 | goto cleanup; | |
376 | } | |
377 | ||
378 | /* Notify the NetVsp of the gpadl handle */ | |
379 | init_packet = &net_device->channel_init_pkt; | |
380 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
381 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 382 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 383 | net_device->send_buf_gpadl_handle; |
c51ed182 | 384 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
385 | |
386 | /* Send the gpadl notification request */ | |
387 | ret = vmbus_sendpacket(device->channel, init_packet, | |
388 | sizeof(struct nvsp_message), | |
389 | (unsigned long)init_packet, | |
390 | VM_PKT_DATA_INBAND, | |
391 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
392 | if (ret != 0) { | |
393 | netdev_err(ndev, | |
394 | "unable to send send buffer's gpadl to netvsp\n"); | |
395 | goto cleanup; | |
396 | } | |
397 | ||
398 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); | |
399 | BUG_ON(t == 0); | |
400 | ||
401 | /* Check the response */ | |
402 | if (init_packet->msg.v1_msg. | |
403 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
404 | netdev_err(ndev, "Unable to complete send buffer " | |
405 | "initialization with NetVsp - status %d\n", | |
406 | init_packet->msg.v1_msg. | |
c51ed182 | 407 | send_send_buf_complete.status); |
c25aaf81 KS |
408 | ret = -EINVAL; |
409 | goto cleanup; | |
410 | } | |
411 | ||
412 | /* Parse the response */ | |
413 | net_device->send_section_size = init_packet->msg. | |
414 | v1_msg.send_send_buf_complete.section_size; | |
415 | ||
416 | /* Section count is simply the size divided by the section size. | |
417 | */ | |
418 | net_device->send_section_cnt = | |
419 | net_device->send_buf_size/net_device->send_section_size; | |
420 | ||
421 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
422 | net_device->send_section_size, net_device->send_section_cnt); | |
423 | ||
424 | /* Setup state for managing the send buffer. */ | |
425 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
426 | BITS_PER_LONG); | |
427 | ||
428 | net_device->send_section_map = | |
429 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
430 | if (net_device->send_section_map == NULL) { |
431 | ret = -ENOMEM; | |
c25aaf81 | 432 | goto cleanup; |
dd1d3f8f | 433 | } |
c25aaf81 | 434 | |
0c3b7b2f | 435 | goto exit; |
fceaf24a | 436 | |
0c3b7b2f | 437 | cleanup: |
3d541ac5 | 438 | netvsc_destroy_buf(device); |
fceaf24a | 439 | |
0c3b7b2f | 440 | exit: |
fceaf24a HJ |
441 | return ret; |
442 | } | |
443 | ||
fceaf24a | 444 | |
f157e78d HZ |
445 | /* Negotiate NVSP protocol version */ |
446 | static int negotiate_nvsp_ver(struct hv_device *device, | |
447 | struct netvsc_device *net_device, | |
448 | struct nvsp_message *init_packet, | |
449 | u32 nvsp_ver) | |
fceaf24a | 450 | { |
0a1275ca | 451 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c NMG |
452 | int ret; |
453 | unsigned long t; | |
fceaf24a | 454 | |
85799a37 | 455 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 456 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
457 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
458 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 459 | |
454f18a9 | 460 | /* Send the init request */ |
85799a37 | 461 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 462 | sizeof(struct nvsp_message), |
85799a37 | 463 | (unsigned long)init_packet, |
415f2287 | 464 | VM_PKT_DATA_INBAND, |
5a4df290 | 465 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 466 | |
b8a3d52b | 467 | if (ret != 0) |
f157e78d | 468 | return ret; |
fceaf24a | 469 | |
5c5781b3 | 470 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 471 | |
f157e78d HZ |
472 | if (t == 0) |
473 | return -ETIMEDOUT; | |
fceaf24a | 474 | |
53d21fdb | 475 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
476 | NVSP_STAT_SUCCESS) |
477 | return -EINVAL; | |
fceaf24a | 478 | |
a1eabb01 | 479 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
480 | return 0; |
481 | ||
71790a27 | 482 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
483 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
484 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 485 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 486 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 487 | |
71790a27 HZ |
488 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) |
489 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; | |
490 | ||
f157e78d HZ |
491 | ret = vmbus_sendpacket(device->channel, init_packet, |
492 | sizeof(struct nvsp_message), | |
493 | (unsigned long)init_packet, | |
494 | VM_PKT_DATA_INBAND, 0); | |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
499 | static int netvsc_connect_vsp(struct hv_device *device) | |
500 | { | |
501 | int ret; | |
502 | struct netvsc_device *net_device; | |
503 | struct nvsp_message *init_packet; | |
504 | int ndis_version; | |
a1eabb01 HZ |
505 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
506 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
507 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
508 | |
509 | net_device = get_outbound_net_device(device); | |
510 | if (!net_device) | |
511 | return -ENODEV; | |
f157e78d HZ |
512 | |
513 | init_packet = &net_device->channel_init_pkt; | |
514 | ||
515 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
516 | for (i = num_ver - 1; i >= 0; i--) |
517 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
518 | ver_list[i]) == 0) { | |
519 | net_device->nvsp_version = ver_list[i]; | |
520 | break; | |
521 | } | |
522 | ||
523 | if (i < 0) { | |
0f48c72c | 524 | ret = -EPROTO; |
0c3b7b2f | 525 | goto cleanup; |
fceaf24a | 526 | } |
f157e78d HZ |
527 | |
528 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
529 | ||
454f18a9 | 530 | /* Send the ndis version */ |
85799a37 | 531 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 532 | |
a1eabb01 | 533 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 534 | ndis_version = 0x00060001; |
a1eabb01 HZ |
535 | else |
536 | ndis_version = 0x0006001e; | |
fceaf24a | 537 | |
53d21fdb HZ |
538 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
539 | init_packet->msg.v1_msg. | |
540 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 541 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
542 | init_packet->msg.v1_msg. |
543 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 544 | ndis_version & 0xFFFF; |
fceaf24a | 545 | |
454f18a9 | 546 | /* Send the init request */ |
85799a37 | 547 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
548 | sizeof(struct nvsp_message), |
549 | (unsigned long)init_packet, | |
550 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 551 | if (ret != 0) |
0c3b7b2f | 552 | goto cleanup; |
454f18a9 BP |
553 | |
554 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
555 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
556 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
557 | else | |
558 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 559 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 560 | |
c25aaf81 | 561 | ret = netvsc_init_buf(device); |
fceaf24a | 562 | |
0c3b7b2f | 563 | cleanup: |
fceaf24a HJ |
564 | return ret; |
565 | } | |
566 | ||
3d541ac5 | 567 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 568 | { |
3d541ac5 | 569 | netvsc_destroy_buf(device); |
fceaf24a HJ |
570 | } |
571 | ||
3e189519 | 572 | /* |
5a71ae30 | 573 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 574 | */ |
905620d1 | 575 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 576 | { |
3d541ac5 VK |
577 | struct net_device *ndev = hv_get_drvdata(device); |
578 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
579 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
fceaf24a | 580 | |
3d541ac5 | 581 | netvsc_disconnect_vsp(device); |
9d88f33a | 582 | |
3d541ac5 | 583 | net_device_ctx->nvdev = NULL; |
3852409b | 584 | |
86c921af S |
585 | /* |
586 | * At this point, no one should be accessing net_device | |
587 | * except in here | |
588 | */ | |
c909ebbd | 589 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 590 | |
454f18a9 | 591 | /* Now, we can close the channel safely */ |
85799a37 | 592 | vmbus_close(device->channel); |
fceaf24a | 593 | |
454f18a9 | 594 | /* Release all resources */ |
aa99c479 | 595 | vfree(net_device->sub_cb_buf); |
f90251c8 | 596 | free_netvsc_device(net_device); |
21a80820 | 597 | return 0; |
fceaf24a HJ |
598 | } |
599 | ||
33be96e4 HZ |
600 | |
601 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
602 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
603 | ||
604 | /* | |
605 | * Get the percentage of available bytes to write in the ring. | |
606 | * The return value is in range from 0 to 100. | |
607 | */ | |
608 | static inline u32 hv_ringbuf_avail_percent( | |
609 | struct hv_ring_buffer_info *ring_info) | |
610 | { | |
611 | u32 avail_read, avail_write; | |
612 | ||
613 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
614 | ||
615 | return avail_write * 100 / ring_info->ring_datasize; | |
616 | } | |
617 | ||
c25aaf81 KS |
618 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
619 | u32 index) | |
620 | { | |
621 | sync_change_bit(index, net_device->send_section_map); | |
622 | } | |
623 | ||
97c1723a | 624 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 625 | struct vmbus_channel *incoming_channel, |
97c1723a | 626 | struct hv_device *device, |
85799a37 | 627 | struct vmpacket_descriptor *packet) |
fceaf24a | 628 | { |
85799a37 HZ |
629 | struct nvsp_message *nvsp_packet; |
630 | struct hv_netvsc_packet *nvsc_packet; | |
3d541ac5 VK |
631 | struct net_device *ndev = hv_get_drvdata(device); |
632 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
c25aaf81 | 633 | u32 send_index; |
3a3d9a0a | 634 | struct sk_buff *skb; |
fceaf24a | 635 | |
85799a37 | 636 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 637 | (packet->offset8 << 3)); |
fceaf24a | 638 | |
53d21fdb HZ |
639 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
640 | (nvsp_packet->hdr.msg_type == | |
641 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
642 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
643 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
644 | (nvsp_packet->hdr.msg_type == | |
645 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 646 | /* Copy the response back */ |
53d21fdb | 647 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 648 | sizeof(struct nvsp_message)); |
35abb21a | 649 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
650 | } else if (nvsp_packet->hdr.msg_type == |
651 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 652 | int num_outstanding_sends; |
5b54dac8 HZ |
653 | u16 q_idx = 0; |
654 | struct vmbus_channel *channel = device->channel; | |
655 | int queue_sends; | |
33be96e4 | 656 | |
454f18a9 | 657 | /* Get the send context */ |
3a3d9a0a | 658 | skb = (struct sk_buff *)(unsigned long)packet->trans_id; |
fceaf24a | 659 | |
454f18a9 | 660 | /* Notify the layer above us */ |
3a3d9a0a KS |
661 | if (skb) { |
662 | nvsc_packet = (struct hv_netvsc_packet *) skb->cb; | |
c25aaf81 KS |
663 | send_index = nvsc_packet->send_buf_index; |
664 | if (send_index != NETVSC_INVALID_INDEX) | |
665 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 | 666 | q_idx = nvsc_packet->q_idx; |
25b85ee8 | 667 | channel = incoming_channel; |
3a3d9a0a | 668 | dev_kfree_skb_any(skb); |
5b54dac8 | 669 | } |
fceaf24a | 670 | |
33be96e4 HZ |
671 | num_outstanding_sends = |
672 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
673 | queue_sends = atomic_dec_return(&net_device-> |
674 | queue_sends[q_idx]); | |
1d06825b | 675 | |
dc5cd894 HZ |
676 | if (net_device->destroy && num_outstanding_sends == 0) |
677 | wake_up(&net_device->wait_drain); | |
678 | ||
5b54dac8 | 679 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
3d541ac5 | 680 | !net_device_ctx->start_remove && |
5b54dac8 HZ |
681 | (hv_ringbuf_avail_percent(&channel->outbound) > |
682 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
683 | netif_tx_wake_queue(netdev_get_tx_queue( | |
684 | ndev, q_idx)); | |
21a80820 | 685 | } else { |
d9871158 | 686 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 687 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
688 | } |
689 | ||
fceaf24a HJ |
690 | } |
691 | ||
c25aaf81 KS |
692 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
693 | { | |
694 | unsigned long index; | |
695 | u32 max_words = net_device->map_words; | |
696 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
697 | u32 section_cnt = net_device->send_section_cnt; | |
698 | int ret_val = NETVSC_INVALID_INDEX; | |
699 | int i; | |
700 | int prev_val; | |
701 | ||
702 | for (i = 0; i < max_words; i++) { | |
703 | if (!~(map_addr[i])) | |
704 | continue; | |
705 | index = ffz(map_addr[i]); | |
706 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
707 | if (prev_val) | |
708 | continue; | |
709 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
710 | break; | |
711 | ret_val = (index + (i * BITS_PER_LONG)); | |
712 | break; | |
713 | } | |
714 | return ret_val; | |
715 | } | |
716 | ||
da19fcd0 LP |
717 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
718 | unsigned int section_index, | |
7c3877f2 | 719 | u32 pend_size, |
24476760 | 720 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 721 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
722 | struct hv_page_buffer **pb, |
723 | struct sk_buff *skb) | |
c25aaf81 KS |
724 | { |
725 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
726 | char *dest = start + (section_index * net_device->send_section_size) |
727 | + pend_size; | |
c25aaf81 | 728 | int i; |
694a9fb0 | 729 | bool is_data_pkt = (skb != NULL) ? true : false; |
bde79be5 | 730 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 731 | u32 msg_size = 0; |
7c3877f2 HZ |
732 | u32 padding = 0; |
733 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
734 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
735 | packet->page_buf_cnt; | |
7c3877f2 HZ |
736 | |
737 | /* Add padding */ | |
bde79be5 | 738 | if (is_data_pkt && xmit_more && remain && |
aa0a34be | 739 | !packet->cp_partial) { |
7c3877f2 | 740 | padding = net_device->pkt_align - remain; |
24476760 | 741 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
742 | packet->total_data_buflen += padding; |
743 | } | |
c25aaf81 | 744 | |
aa0a34be | 745 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
746 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
747 | u32 offset = (*pb)[i].offset; | |
748 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
749 | |
750 | memcpy(dest, (src + offset), len); | |
751 | msg_size += len; | |
752 | dest += len; | |
753 | } | |
7c3877f2 HZ |
754 | |
755 | if (padding) { | |
756 | memset(dest, 0, padding); | |
757 | msg_size += padding; | |
758 | } | |
759 | ||
c25aaf81 KS |
760 | return msg_size; |
761 | } | |
762 | ||
7c3877f2 | 763 | static inline int netvsc_send_pkt( |
0a1275ca | 764 | struct hv_device *device, |
7c3877f2 | 765 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 766 | struct netvsc_device *net_device, |
3a3d9a0a KS |
767 | struct hv_page_buffer **pb, |
768 | struct sk_buff *skb) | |
fceaf24a | 769 | { |
7c3877f2 | 770 | struct nvsp_message nvmsg; |
3a67c9cc | 771 | u16 q_idx = packet->q_idx; |
8b9fbe1a | 772 | struct vmbus_channel *out_channel = net_device->chn_table[q_idx]; |
0a1275ca | 773 | struct net_device *ndev = hv_get_drvdata(device); |
7c3877f2 HZ |
774 | u64 req_id; |
775 | int ret; | |
aa0a34be | 776 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 777 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
bde79be5 | 778 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 779 | |
7c3877f2 | 780 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 781 | if (skb != NULL) { |
21a80820 | 782 | /* 0 is RMC_DATA; */ |
7c3877f2 | 783 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
784 | } else { |
785 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 786 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 787 | } |
fceaf24a | 788 | |
7c3877f2 HZ |
789 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
790 | packet->send_buf_index; | |
791 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
792 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
793 | else | |
794 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
795 | packet->total_data_buflen; | |
21a80820 | 796 | |
3a3d9a0a | 797 | req_id = (ulong)skb; |
f1ea3cd7 | 798 | |
c3582a2c HZ |
799 | if (out_channel->rescind) |
800 | return -ENODEV; | |
801 | ||
82fa3c77 KS |
802 | /* |
803 | * It is possible that once we successfully place this packet | |
804 | * on the ringbuffer, we may stop the queue. In that case, we want | |
805 | * to notify the host independent of the xmit_more flag. We don't | |
806 | * need to be precise here; in the worst case we may signal the host | |
807 | * unnecessarily. | |
808 | */ | |
809 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) | |
bde79be5 | 810 | xmit_more = false; |
82fa3c77 | 811 | |
72a2f5bd | 812 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
813 | pgbuf = packet->cp_partial ? (*pb) + |
814 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
815 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
816 | pgbuf, | |
817 | packet->page_buf_cnt, | |
818 | &nvmsg, | |
819 | sizeof(struct nvsp_message), | |
820 | req_id, | |
821 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 822 | !xmit_more); |
21a80820 | 823 | } else { |
82fa3c77 KS |
824 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
825 | sizeof(struct nvsp_message), | |
826 | req_id, | |
827 | VM_PKT_DATA_INBAND, | |
828 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 829 | !xmit_more); |
fceaf24a HJ |
830 | } |
831 | ||
1d06825b HZ |
832 | if (ret == 0) { |
833 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 834 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 | 835 | |
82fa3c77 KS |
836 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
837 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); | |
5b54dac8 | 838 | |
33be96e4 | 839 | if (atomic_read(&net_device-> |
3a67c9cc | 840 | queue_sends[q_idx]) < 1) |
5b54dac8 | 841 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 842 | ndev, q_idx)); |
33be96e4 | 843 | } |
1d06825b | 844 | } else if (ret == -EAGAIN) { |
5b54dac8 | 845 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
846 | ndev, q_idx)); |
847 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 848 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 849 | ndev, q_idx)); |
33be96e4 HZ |
850 | ret = -ENOSPC; |
851 | } | |
1d06825b | 852 | } else { |
d9871158 | 853 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 854 | packet, ret); |
1d06825b | 855 | } |
fceaf24a | 856 | |
7c3877f2 HZ |
857 | return ret; |
858 | } | |
859 | ||
c85e4924 HZ |
860 | /* Move packet out of multi send data (msd), and clear msd */ |
861 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
862 | struct sk_buff **msd_skb, | |
863 | struct multi_send_data *msdp) | |
864 | { | |
865 | *msd_skb = msdp->skb; | |
866 | *msd_send = msdp->pkt; | |
867 | msdp->skb = NULL; | |
868 | msdp->pkt = NULL; | |
869 | msdp->count = 0; | |
870 | } | |
871 | ||
7c3877f2 | 872 | int netvsc_send(struct hv_device *device, |
24476760 | 873 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 874 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
875 | struct hv_page_buffer **pb, |
876 | struct sk_buff *skb) | |
7c3877f2 HZ |
877 | { |
878 | struct netvsc_device *net_device; | |
879 | int ret = 0, m_ret = 0; | |
880 | struct vmbus_channel *out_channel; | |
881 | u16 q_idx = packet->q_idx; | |
882 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
883 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
884 | struct multi_send_data *msdp; |
885 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 886 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 887 | bool try_batch; |
bde79be5 | 888 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
889 | |
890 | net_device = get_outbound_net_device(device); | |
891 | if (!net_device) | |
892 | return -ENODEV; | |
893 | ||
8b9fbe1a | 894 | out_channel = net_device->chn_table[q_idx]; |
25b85ee8 | 895 | |
7c3877f2 | 896 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 897 | packet->cp_partial = false; |
7c3877f2 | 898 | |
cf8190e4 HZ |
899 | /* Send control message directly without accessing msd (Multi-Send |
900 | * Data) field which may be changed during data packet processing. | |
901 | */ | |
902 | if (!skb) { | |
903 | cur_send = packet; | |
904 | goto send_now; | |
905 | } | |
906 | ||
7c3877f2 HZ |
907 | msdp = &net_device->msd[q_idx]; |
908 | ||
909 | /* batch packets in send buffer if possible */ | |
7c3877f2 HZ |
910 | if (msdp->pkt) |
911 | msd_len = msdp->pkt->total_data_buflen; | |
912 | ||
694a9fb0 | 913 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
aa0a34be HZ |
914 | net_device->max_pkt; |
915 | ||
916 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
917 | net_device->send_section_size) { |
918 | section_index = msdp->pkt->send_buf_index; | |
919 | ||
aa0a34be HZ |
920 | } else if (try_batch && msd_len + packet->rmsg_size < |
921 | net_device->send_section_size) { | |
922 | section_index = msdp->pkt->send_buf_index; | |
923 | packet->cp_partial = true; | |
924 | ||
694a9fb0 | 925 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
7c3877f2 HZ |
926 | net_device->send_section_size) { |
927 | section_index = netvsc_get_next_send_section(net_device); | |
928 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
929 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
930 | msd_len = 0; | |
7c3877f2 HZ |
931 | } |
932 | } | |
933 | ||
934 | if (section_index != NETVSC_INVALID_INDEX) { | |
935 | netvsc_copy_to_send_buf(net_device, | |
936 | section_index, msd_len, | |
694a9fb0 | 937 | packet, rndis_msg, pb, skb); |
b08cc791 | 938 | |
7c3877f2 | 939 | packet->send_buf_index = section_index; |
aa0a34be HZ |
940 | |
941 | if (packet->cp_partial) { | |
942 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
943 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
944 | } else { | |
945 | packet->page_buf_cnt = 0; | |
946 | packet->total_data_buflen += msd_len; | |
aa0a34be | 947 | } |
7c3877f2 | 948 | |
c85e4924 HZ |
949 | if (msdp->skb) |
950 | dev_kfree_skb_any(msdp->skb); | |
ee90b812 | 951 | |
bde79be5 | 952 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 953 | msdp->skb = skb; |
7c3877f2 HZ |
954 | msdp->pkt = packet; |
955 | msdp->count++; | |
956 | } else { | |
957 | cur_send = packet; | |
c85e4924 | 958 | msdp->skb = NULL; |
7c3877f2 HZ |
959 | msdp->pkt = NULL; |
960 | msdp->count = 0; | |
961 | } | |
962 | } else { | |
c85e4924 | 963 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
964 | cur_send = packet; |
965 | } | |
966 | ||
7c3877f2 | 967 | if (msd_send) { |
0a1275ca VK |
968 | m_ret = netvsc_send_pkt(device, msd_send, net_device, |
969 | NULL, msd_skb); | |
7c3877f2 HZ |
970 | |
971 | if (m_ret != 0) { | |
972 | netvsc_free_send_slot(net_device, | |
973 | msd_send->send_buf_index); | |
c85e4924 | 974 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
975 | } |
976 | } | |
977 | ||
cf8190e4 | 978 | send_now: |
7c3877f2 | 979 | if (cur_send) |
0a1275ca | 980 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 981 | |
7aab5159 JS |
982 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
983 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 984 | |
fceaf24a HJ |
985 | return ret; |
986 | } | |
987 | ||
5fa9d3c5 | 988 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 989 | struct vmbus_channel *channel, |
97c1723a | 990 | struct netvsc_device *net_device, |
63f6921d | 991 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
992 | { |
993 | struct nvsp_message recvcompMessage; | |
994 | int retries = 0; | |
995 | int ret; | |
0a1275ca | 996 | struct net_device *ndev = hv_get_drvdata(device); |
5fa9d3c5 HZ |
997 | |
998 | recvcompMessage.hdr.msg_type = | |
999 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
1000 | ||
63f6921d | 1001 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
1002 | |
1003 | retry_send_cmplt: | |
1004 | /* Send the completion */ | |
5b54dac8 | 1005 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
1006 | sizeof(struct nvsp_message), transaction_id, |
1007 | VM_PKT_COMP, 0); | |
1008 | if (ret == 0) { | |
1009 | /* success */ | |
1010 | /* no-op */ | |
d2598f01 | 1011 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
1012 | /* no more room...wait a bit and attempt to retry 3 times */ |
1013 | retries++; | |
d9871158 | 1014 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 1015 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
1016 | |
1017 | if (retries < 4) { | |
1018 | udelay(100); | |
1019 | goto retry_send_cmplt; | |
1020 | } else { | |
d9871158 | 1021 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1022 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
1023 | transaction_id); |
1024 | } | |
1025 | } else { | |
d9871158 | 1026 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1027 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
1028 | } |
1029 | } | |
1030 | ||
97c1723a | 1031 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 1032 | struct vmbus_channel *channel, |
97c1723a KS |
1033 | struct hv_device *device, |
1034 | struct vmpacket_descriptor *packet) | |
fceaf24a | 1035 | { |
85799a37 HZ |
1036 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
1037 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
1038 | struct hv_netvsc_packet nv_pkt; |
1039 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
1040 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
1041 | int i; |
1042 | int count = 0; | |
0a1275ca | 1043 | struct net_device *ndev = hv_get_drvdata(device); |
c4b20c63 | 1044 | void *data; |
779b4d17 | 1045 | |
21a80820 GKH |
1046 | /* |
1047 | * All inbound packets other than send completion should be xfer page | |
1048 | * packet | |
1049 | */ | |
415f2287 | 1050 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
d9871158 | 1051 | netdev_err(ndev, "Unknown packet type received - %d\n", |
415f2287 | 1052 | packet->type); |
fceaf24a HJ |
1053 | return; |
1054 | } | |
1055 | ||
85799a37 | 1056 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1057 | (packet->offset8 << 3)); |
fceaf24a | 1058 | |
454f18a9 | 1059 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1060 | if (nvsp_packet->hdr.msg_type != |
1061 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
d9871158 | 1062 | netdev_err(ndev, "Unknown nvsp packet type received-" |
c909ebbd | 1063 | " %d\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
1064 | return; |
1065 | } | |
1066 | ||
85799a37 | 1067 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1068 | |
415f2287 | 1069 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
d9871158 | 1070 | netdev_err(ndev, "Invalid xfer page set id - " |
c909ebbd | 1071 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 1072 | vmxferpage_packet->xfer_pageset_id); |
fceaf24a HJ |
1073 | return; |
1074 | } | |
1075 | ||
4baab261 | 1076 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1077 | |
454f18a9 | 1078 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1079 | for (i = 0; i < count; i++) { |
454f18a9 | 1080 | /* Initialize the netvsc packet */ |
c4b20c63 | 1081 | data = (void *)((unsigned long)net_device-> |
45326342 | 1082 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); |
72a2f5bd | 1083 | netvsc_packet->total_data_buflen = |
415f2287 | 1084 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1085 | |
454f18a9 | 1086 | /* Pass it to the upper layer */ |
10082f98 KS |
1087 | status = rndis_filter_receive(device, netvsc_packet, &data, |
1088 | channel); | |
fceaf24a | 1089 | |
fceaf24a HJ |
1090 | } |
1091 | ||
4baab261 HZ |
1092 | netvsc_send_recv_completion(device, channel, net_device, |
1093 | vmxferpage_packet->d.trans_id, status); | |
fceaf24a HJ |
1094 | } |
1095 | ||
5b54dac8 HZ |
1096 | |
1097 | static void netvsc_send_table(struct hv_device *hdev, | |
71790a27 | 1098 | struct nvsp_message *nvmsg) |
5b54dac8 HZ |
1099 | { |
1100 | struct netvsc_device *nvscdev; | |
0a1275ca | 1101 | struct net_device *ndev = hv_get_drvdata(hdev); |
5b54dac8 HZ |
1102 | int i; |
1103 | u32 count, *tab; | |
1104 | ||
1105 | nvscdev = get_outbound_net_device(hdev); | |
1106 | if (!nvscdev) | |
1107 | return; | |
5b54dac8 | 1108 | |
5b54dac8 HZ |
1109 | count = nvmsg->msg.v5_msg.send_table.count; |
1110 | if (count != VRSS_SEND_TAB_SIZE) { | |
1111 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1116 | nvmsg->msg.v5_msg.send_table.offset); | |
1117 | ||
1118 | for (i = 0; i < count; i++) | |
1119 | nvscdev->send_table[i] = tab[i]; | |
1120 | } | |
1121 | ||
71790a27 HZ |
1122 | static void netvsc_send_vf(struct netvsc_device *nvdev, |
1123 | struct nvsp_message *nvmsg) | |
1124 | { | |
1125 | nvdev->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; | |
1126 | nvdev->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
1127 | } | |
1128 | ||
1129 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
1130 | struct netvsc_device *nvdev, | |
1131 | struct nvsp_message *nvmsg) | |
1132 | { | |
1133 | switch (nvmsg->hdr.msg_type) { | |
1134 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1135 | netvsc_send_table(hdev, nvmsg); | |
1136 | break; | |
1137 | ||
1138 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
1139 | netvsc_send_vf(nvdev, nvmsg); | |
1140 | break; | |
1141 | } | |
1142 | } | |
1143 | ||
5b54dac8 | 1144 | void netvsc_channel_cb(void *context) |
fceaf24a | 1145 | { |
21a80820 | 1146 | int ret; |
5b54dac8 HZ |
1147 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
1148 | struct hv_device *device; | |
85799a37 HZ |
1149 | struct netvsc_device *net_device; |
1150 | u32 bytes_recvd; | |
1151 | u64 request_id; | |
8dc0a06a | 1152 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1153 | unsigned char *buffer; |
1154 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1155 | struct net_device *ndev; |
71790a27 | 1156 | struct nvsp_message *nvmsg; |
fceaf24a | 1157 | |
5b54dac8 HZ |
1158 | if (channel->primary_channel != NULL) |
1159 | device = channel->primary_channel->device_obj; | |
1160 | else | |
1161 | device = channel->device_obj; | |
1162 | ||
5a71ae30 | 1163 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1164 | if (!net_device) |
ee0c4c39 | 1165 | return; |
0a1275ca | 1166 | ndev = hv_get_drvdata(device); |
5b54dac8 | 1167 | buffer = get_per_channel_state(channel); |
fceaf24a | 1168 | |
21a80820 | 1169 | do { |
5b54dac8 | 1170 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1171 | &bytes_recvd, &request_id); |
21a80820 | 1172 | if (ret == 0) { |
85799a37 | 1173 | if (bytes_recvd > 0) { |
21a80820 | 1174 | desc = (struct vmpacket_descriptor *)buffer; |
71790a27 HZ |
1175 | nvmsg = (struct nvsp_message *)((unsigned long) |
1176 | desc + (desc->offset8 << 3)); | |
415f2287 HZ |
1177 | switch (desc->type) { |
1178 | case VM_PKT_COMP: | |
97c1723a | 1179 | netvsc_send_completion(net_device, |
25b85ee8 | 1180 | channel, |
97c1723a | 1181 | device, desc); |
21a80820 GKH |
1182 | break; |
1183 | ||
415f2287 | 1184 | case VM_PKT_DATA_USING_XFER_PAGES: |
5b54dac8 HZ |
1185 | netvsc_receive(net_device, channel, |
1186 | device, desc); | |
1187 | break; | |
1188 | ||
1189 | case VM_PKT_DATA_INBAND: | |
71790a27 HZ |
1190 | netvsc_receive_inband(device, |
1191 | net_device, | |
1192 | nvmsg); | |
21a80820 GKH |
1193 | break; |
1194 | ||
1195 | default: | |
d9871158 | 1196 | netdev_err(ndev, |
21a80820 GKH |
1197 | "unhandled packet type %d, " |
1198 | "tid %llx len %d\n", | |
415f2287 | 1199 | desc->type, request_id, |
85799a37 | 1200 | bytes_recvd); |
21a80820 | 1201 | break; |
fceaf24a HJ |
1202 | } |
1203 | ||
21a80820 | 1204 | } else { |
ee0c4c39 KS |
1205 | /* |
1206 | * We are done for this pass. | |
1207 | */ | |
fceaf24a HJ |
1208 | break; |
1209 | } | |
ee0c4c39 | 1210 | |
3d5cad97 | 1211 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1212 | if (bufferlen > NETVSC_PACKET_SIZE) |
1213 | kfree(buffer); | |
21a80820 | 1214 | /* Handle large packet */ |
85799a37 | 1215 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1216 | if (buffer == NULL) { |
454f18a9 | 1217 | /* Try again next time around */ |
d9871158 | 1218 | netdev_err(ndev, |
21a80820 | 1219 | "unable to allocate buffer of size " |
c909ebbd | 1220 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1221 | break; |
1222 | } | |
1223 | ||
85799a37 | 1224 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1225 | } |
1226 | } while (1); | |
1227 | ||
ee0c4c39 KS |
1228 | if (bufferlen > NETVSC_PACKET_SIZE) |
1229 | kfree(buffer); | |
fceaf24a HJ |
1230 | return; |
1231 | } | |
af24ce42 | 1232 | |
b637e023 HZ |
1233 | /* |
1234 | * netvsc_device_add - Callback when the device belonging to this | |
1235 | * driver is added | |
1236 | */ | |
7bd23a4d | 1237 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 | 1238 | { |
88098834 | 1239 | int i, ret = 0; |
aae23986 S |
1240 | int ring_size = |
1241 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1242 | struct netvsc_device *net_device; |
88098834 VK |
1243 | struct net_device *ndev = hv_get_drvdata(device); |
1244 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1245 | |
88098834 | 1246 | net_device = alloc_net_device(); |
b1c84927 DC |
1247 | if (!net_device) |
1248 | return -ENOMEM; | |
b637e023 | 1249 | |
5b54dac8 HZ |
1250 | net_device->ring_size = ring_size; |
1251 | ||
b637e023 | 1252 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1253 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1254 | |
5b54dac8 HZ |
1255 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1256 | ||
b637e023 | 1257 | /* Open the channel */ |
aae23986 S |
1258 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1259 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1260 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1261 | |
1262 | if (ret != 0) { | |
d9871158 | 1263 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1264 | goto cleanup; |
1265 | } | |
1266 | ||
1267 | /* Channel is opened */ | |
c909ebbd | 1268 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1269 | |
88098834 VK |
1270 | /* If we're reopening the device we may have multiple queues, fill the |
1271 | * chn_table with the default channel to use it before subchannels are | |
1272 | * opened. | |
1273 | */ | |
1274 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
1275 | net_device->chn_table[i] = device->channel; | |
1276 | ||
1277 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is | |
1278 | * populated. | |
1279 | */ | |
1280 | wmb(); | |
1281 | ||
1282 | net_device_ctx->nvdev = net_device; | |
5b54dac8 | 1283 | |
b637e023 HZ |
1284 | /* Connect with the NetVsp */ |
1285 | ret = netvsc_connect_vsp(device); | |
1286 | if (ret != 0) { | |
d9871158 | 1287 | netdev_err(ndev, |
c909ebbd | 1288 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1289 | goto close; |
1290 | } | |
1291 | ||
1292 | return ret; | |
1293 | ||
1294 | close: | |
1295 | /* Now, we can close the channel safely */ | |
1296 | vmbus_close(device->channel); | |
1297 | ||
1298 | cleanup: | |
f90251c8 | 1299 | free_netvsc_device(net_device); |
b637e023 HZ |
1300 | |
1301 | return ret; | |
1302 | } |