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Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
5654e932 | 22 | #include <linux/kernel.h> |
0c3b7b2f S |
23 | #include <linux/sched.h> |
24 | #include <linux/wait.h> | |
0ffa63b0 | 25 | #include <linux/mm.h> |
b4362c9c | 26 | #include <linux/delay.h> |
21a80820 | 27 | #include <linux/io.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
d9871158 | 29 | #include <linux/netdevice.h> |
f157e78d | 30 | #include <linux/if_ether.h> |
d6472302 | 31 | #include <linux/vmalloc.h> |
c25aaf81 | 32 | #include <asm/sync_bitops.h> |
3f335ea2 | 33 | |
5ca7252a | 34 | #include "hyperv_net.h" |
fceaf24a | 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 | 79 | atomic_set(&net_device->open_cnt, 0); |
7c3877f2 HZ |
80 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
81 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
82 | ||
85799a37 | 83 | return net_device; |
fceaf24a HJ |
84 | } |
85 | ||
f90251c8 HZ |
86 | static void free_netvsc_device(struct netvsc_device *nvdev) |
87 | { | |
88 | kfree(nvdev->cb_buffer); | |
89 | kfree(nvdev); | |
90 | } | |
91 | ||
5a71ae30 | 92 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 93 | { |
2625466d | 94 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
fceaf24a | 95 | |
9d88f33a | 96 | if (net_device && net_device->destroy) |
85799a37 | 97 | net_device = NULL; |
fceaf24a | 98 | |
85799a37 | 99 | return net_device; |
fceaf24a HJ |
100 | } |
101 | ||
5a71ae30 | 102 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 103 | { |
2625466d | 104 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
9d88f33a S |
105 | |
106 | if (!net_device) | |
107 | goto get_in_err; | |
108 | ||
109 | if (net_device->destroy && | |
110 | atomic_read(&net_device->num_outstanding_sends) == 0) | |
85799a37 | 111 | net_device = NULL; |
fceaf24a | 112 | |
9d88f33a | 113 | get_in_err: |
85799a37 | 114 | return net_device; |
fceaf24a HJ |
115 | } |
116 | ||
fceaf24a | 117 | |
3d541ac5 | 118 | static int netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
119 | { |
120 | struct nvsp_message *revoke_packet; | |
121 | int ret = 0; | |
3d541ac5 | 122 | struct net_device *ndev = hv_get_drvdata(device); |
2625466d | 123 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); |
ec91cd09 HZ |
124 | |
125 | /* | |
126 | * If we got a section count, it means we received a | |
127 | * SendReceiveBufferComplete msg (ie sent | |
128 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
129 | * to send a revoke msg here | |
130 | */ | |
131 | if (net_device->recv_section_cnt) { | |
132 | /* Send the revoke receive buffer */ | |
133 | revoke_packet = &net_device->revoke_packet; | |
134 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
135 | ||
136 | revoke_packet->hdr.msg_type = | |
137 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
138 | revoke_packet->msg.v1_msg. | |
139 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
140 | ||
3d541ac5 | 141 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
142 | revoke_packet, |
143 | sizeof(struct nvsp_message), | |
144 | (unsigned long)revoke_packet, | |
145 | VM_PKT_DATA_INBAND, 0); | |
146 | /* | |
147 | * If we failed here, we might as well return and | |
148 | * have a leak rather than continue and a bugchk | |
149 | */ | |
150 | if (ret != 0) { | |
d9871158 | 151 | netdev_err(ndev, "unable to send " |
c909ebbd | 152 | "revoke receive buffer to netvsp\n"); |
a3e00530 | 153 | return ret; |
ec91cd09 HZ |
154 | } |
155 | } | |
156 | ||
157 | /* Teardown the gpadl on the vsp end */ | |
158 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
159 | ret = vmbus_teardown_gpadl(device->channel, |
160 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
161 | |
162 | /* If we failed here, we might as well return and have a leak | |
163 | * rather than continue and a bugchk | |
164 | */ | |
165 | if (ret != 0) { | |
d9871158 | 166 | netdev_err(ndev, |
c909ebbd | 167 | "unable to teardown receive buffer's gpadl\n"); |
7f9615e6 | 168 | return ret; |
ec91cd09 HZ |
169 | } |
170 | net_device->recv_buf_gpadl_handle = 0; | |
171 | } | |
172 | ||
173 | if (net_device->recv_buf) { | |
174 | /* Free up the receive buffer */ | |
b679ef73 | 175 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
176 | net_device->recv_buf = NULL; |
177 | } | |
178 | ||
179 | if (net_device->recv_section) { | |
180 | net_device->recv_section_cnt = 0; | |
181 | kfree(net_device->recv_section); | |
182 | net_device->recv_section = NULL; | |
183 | } | |
184 | ||
c25aaf81 KS |
185 | /* Deal with the send buffer we may have setup. |
186 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
187 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
188 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
189 | * to send a revoke msg here |
190 | */ | |
191 | if (net_device->send_section_size) { | |
192 | /* Send the revoke receive buffer */ | |
193 | revoke_packet = &net_device->revoke_packet; | |
194 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
195 | ||
196 | revoke_packet->hdr.msg_type = | |
197 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
198 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
199 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 200 | |
3d541ac5 | 201 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
202 | revoke_packet, |
203 | sizeof(struct nvsp_message), | |
204 | (unsigned long)revoke_packet, | |
205 | VM_PKT_DATA_INBAND, 0); | |
206 | /* If we failed here, we might as well return and | |
207 | * have a leak rather than continue and a bugchk | |
208 | */ | |
209 | if (ret != 0) { | |
210 | netdev_err(ndev, "unable to send " | |
211 | "revoke send buffer to netvsp\n"); | |
212 | return ret; | |
213 | } | |
214 | } | |
215 | /* Teardown the gpadl on the vsp end */ | |
216 | if (net_device->send_buf_gpadl_handle) { | |
3d541ac5 | 217 | ret = vmbus_teardown_gpadl(device->channel, |
c25aaf81 KS |
218 | net_device->send_buf_gpadl_handle); |
219 | ||
220 | /* If we failed here, we might as well return and have a leak | |
221 | * rather than continue and a bugchk | |
222 | */ | |
223 | if (ret != 0) { | |
224 | netdev_err(ndev, | |
225 | "unable to teardown send buffer's gpadl\n"); | |
226 | return ret; | |
227 | } | |
2f18423d | 228 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
229 | } |
230 | if (net_device->send_buf) { | |
c51ed182 | 231 | /* Free up the send buffer */ |
06b47aac | 232 | vfree(net_device->send_buf); |
c25aaf81 KS |
233 | net_device->send_buf = NULL; |
234 | } | |
235 | kfree(net_device->send_section_map); | |
236 | ||
ec91cd09 HZ |
237 | return ret; |
238 | } | |
239 | ||
c25aaf81 | 240 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 241 | { |
21a80820 | 242 | int ret = 0; |
85799a37 HZ |
243 | struct netvsc_device *net_device; |
244 | struct nvsp_message *init_packet; | |
2ddd5e5f | 245 | struct net_device *ndev; |
0a726c2b | 246 | int node; |
fceaf24a | 247 | |
5a71ae30 | 248 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 249 | if (!net_device) |
927bc33c | 250 | return -ENODEV; |
0a1275ca | 251 | ndev = hv_get_drvdata(device); |
fceaf24a | 252 | |
0a726c2b S |
253 | node = cpu_to_node(device->channel->target_cpu); |
254 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
255 | if (!net_device->recv_buf) | |
256 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
257 | ||
53d21fdb | 258 | if (!net_device->recv_buf) { |
d9871158 | 259 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 260 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 261 | ret = -ENOMEM; |
0c3b7b2f | 262 | goto cleanup; |
fceaf24a | 263 | } |
fceaf24a | 264 | |
454f18a9 BP |
265 | /* |
266 | * Establish the gpadl handle for this buffer on this | |
267 | * channel. Note: This call uses the vmbus connection rather | |
268 | * than the channel to establish the gpadl handle. | |
269 | */ | |
53d21fdb HZ |
270 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
271 | net_device->recv_buf_size, | |
272 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 273 | if (ret != 0) { |
d9871158 | 274 | netdev_err(ndev, |
c909ebbd | 275 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 276 | goto cleanup; |
fceaf24a HJ |
277 | } |
278 | ||
fceaf24a | 279 | |
454f18a9 | 280 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 281 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 282 | |
85799a37 | 283 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 284 | |
53d21fdb HZ |
285 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
286 | init_packet->msg.v1_msg.send_recv_buf. | |
287 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
288 | init_packet->msg.v1_msg. | |
289 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 290 | |
454f18a9 | 291 | /* Send the gpadl notification request */ |
85799a37 | 292 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 293 | sizeof(struct nvsp_message), |
85799a37 | 294 | (unsigned long)init_packet, |
415f2287 | 295 | VM_PKT_DATA_INBAND, |
5a4df290 | 296 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 297 | if (ret != 0) { |
d9871158 | 298 | netdev_err(ndev, |
c909ebbd | 299 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 300 | goto cleanup; |
fceaf24a HJ |
301 | } |
302 | ||
5362855a | 303 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 304 | |
454f18a9 | 305 | /* Check the response */ |
53d21fdb HZ |
306 | if (init_packet->msg.v1_msg. |
307 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 308 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 309 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
310 | init_packet->msg.v1_msg. |
311 | send_recv_buf_complete.status); | |
927bc33c | 312 | ret = -EINVAL; |
0c3b7b2f | 313 | goto cleanup; |
fceaf24a HJ |
314 | } |
315 | ||
454f18a9 | 316 | /* Parse the response */ |
fceaf24a | 317 | |
53d21fdb HZ |
318 | net_device->recv_section_cnt = init_packet->msg. |
319 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 320 | |
c1813200 HZ |
321 | net_device->recv_section = kmemdup( |
322 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
323 | net_device->recv_section_cnt * | |
324 | sizeof(struct nvsp_1_receive_buffer_section), | |
325 | GFP_KERNEL); | |
53d21fdb | 326 | if (net_device->recv_section == NULL) { |
927bc33c | 327 | ret = -EINVAL; |
0c3b7b2f | 328 | goto cleanup; |
fceaf24a HJ |
329 | } |
330 | ||
21a80820 GKH |
331 | /* |
332 | * For 1st release, there should only be 1 section that represents the | |
333 | * entire receive buffer | |
334 | */ | |
53d21fdb HZ |
335 | if (net_device->recv_section_cnt != 1 || |
336 | net_device->recv_section->offset != 0) { | |
927bc33c | 337 | ret = -EINVAL; |
0c3b7b2f | 338 | goto cleanup; |
fceaf24a HJ |
339 | } |
340 | ||
c25aaf81 KS |
341 | /* Now setup the send buffer. |
342 | */ | |
5defde59 S |
343 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
344 | if (!net_device->send_buf) | |
345 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
346 | if (!net_device->send_buf) { |
347 | netdev_err(ndev, "unable to allocate send " | |
348 | "buffer of size %d\n", net_device->send_buf_size); | |
349 | ret = -ENOMEM; | |
350 | goto cleanup; | |
351 | } | |
352 | ||
353 | /* Establish the gpadl handle for this buffer on this | |
354 | * channel. Note: This call uses the vmbus connection rather | |
355 | * than the channel to establish the gpadl handle. | |
356 | */ | |
357 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
358 | net_device->send_buf_size, | |
359 | &net_device->send_buf_gpadl_handle); | |
360 | if (ret != 0) { | |
361 | netdev_err(ndev, | |
362 | "unable to establish send buffer's gpadl\n"); | |
363 | goto cleanup; | |
364 | } | |
365 | ||
366 | /* Notify the NetVsp of the gpadl handle */ | |
367 | init_packet = &net_device->channel_init_pkt; | |
368 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
369 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 370 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 371 | net_device->send_buf_gpadl_handle; |
c51ed182 | 372 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
373 | |
374 | /* Send the gpadl notification request */ | |
375 | ret = vmbus_sendpacket(device->channel, init_packet, | |
376 | sizeof(struct nvsp_message), | |
377 | (unsigned long)init_packet, | |
378 | VM_PKT_DATA_INBAND, | |
379 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
380 | if (ret != 0) { | |
381 | netdev_err(ndev, | |
382 | "unable to send send buffer's gpadl to netvsp\n"); | |
383 | goto cleanup; | |
384 | } | |
385 | ||
5362855a | 386 | wait_for_completion(&net_device->channel_init_wait); |
c25aaf81 KS |
387 | |
388 | /* Check the response */ | |
389 | if (init_packet->msg.v1_msg. | |
390 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
391 | netdev_err(ndev, "Unable to complete send buffer " | |
392 | "initialization with NetVsp - status %d\n", | |
393 | init_packet->msg.v1_msg. | |
c51ed182 | 394 | send_send_buf_complete.status); |
c25aaf81 KS |
395 | ret = -EINVAL; |
396 | goto cleanup; | |
397 | } | |
398 | ||
399 | /* Parse the response */ | |
400 | net_device->send_section_size = init_packet->msg. | |
401 | v1_msg.send_send_buf_complete.section_size; | |
402 | ||
403 | /* Section count is simply the size divided by the section size. | |
404 | */ | |
405 | net_device->send_section_cnt = | |
406 | net_device->send_buf_size/net_device->send_section_size; | |
407 | ||
408 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", | |
409 | net_device->send_section_size, net_device->send_section_cnt); | |
410 | ||
411 | /* Setup state for managing the send buffer. */ | |
412 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
413 | BITS_PER_LONG); | |
414 | ||
415 | net_device->send_section_map = | |
416 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
417 | if (net_device->send_section_map == NULL) { |
418 | ret = -ENOMEM; | |
c25aaf81 | 419 | goto cleanup; |
dd1d3f8f | 420 | } |
c25aaf81 | 421 | |
0c3b7b2f | 422 | goto exit; |
fceaf24a | 423 | |
0c3b7b2f | 424 | cleanup: |
3d541ac5 | 425 | netvsc_destroy_buf(device); |
fceaf24a | 426 | |
0c3b7b2f | 427 | exit: |
fceaf24a HJ |
428 | return ret; |
429 | } | |
430 | ||
fceaf24a | 431 | |
f157e78d HZ |
432 | /* Negotiate NVSP protocol version */ |
433 | static int negotiate_nvsp_ver(struct hv_device *device, | |
434 | struct netvsc_device *net_device, | |
435 | struct nvsp_message *init_packet, | |
436 | u32 nvsp_ver) | |
fceaf24a | 437 | { |
0a1275ca | 438 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c | 439 | int ret; |
fceaf24a | 440 | |
85799a37 | 441 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 442 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
443 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
444 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 445 | |
454f18a9 | 446 | /* Send the init request */ |
85799a37 | 447 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 448 | sizeof(struct nvsp_message), |
85799a37 | 449 | (unsigned long)init_packet, |
415f2287 | 450 | VM_PKT_DATA_INBAND, |
5a4df290 | 451 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 452 | |
b8a3d52b | 453 | if (ret != 0) |
f157e78d | 454 | return ret; |
fceaf24a | 455 | |
5362855a | 456 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 457 | |
53d21fdb | 458 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
459 | NVSP_STAT_SUCCESS) |
460 | return -EINVAL; | |
fceaf24a | 461 | |
a1eabb01 | 462 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
463 | return 0; |
464 | ||
71790a27 | 465 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
466 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
467 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 468 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 469 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 470 | |
7f5d5af0 | 471 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) { |
71790a27 HZ |
472 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
473 | ||
7f5d5af0 HZ |
474 | /* Teaming bit is needed to receive link speed updates */ |
475 | init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1; | |
476 | } | |
477 | ||
f157e78d HZ |
478 | ret = vmbus_sendpacket(device->channel, init_packet, |
479 | sizeof(struct nvsp_message), | |
480 | (unsigned long)init_packet, | |
481 | VM_PKT_DATA_INBAND, 0); | |
482 | ||
483 | return ret; | |
484 | } | |
485 | ||
486 | static int netvsc_connect_vsp(struct hv_device *device) | |
487 | { | |
488 | int ret; | |
489 | struct netvsc_device *net_device; | |
490 | struct nvsp_message *init_packet; | |
491 | int ndis_version; | |
a1eabb01 HZ |
492 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
493 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; | |
494 | int i, num_ver = 4; /* number of different NVSP versions */ | |
f157e78d HZ |
495 | |
496 | net_device = get_outbound_net_device(device); | |
497 | if (!net_device) | |
498 | return -ENODEV; | |
f157e78d HZ |
499 | |
500 | init_packet = &net_device->channel_init_pkt; | |
501 | ||
502 | /* Negotiate the latest NVSP protocol supported */ | |
a1eabb01 HZ |
503 | for (i = num_ver - 1; i >= 0; i--) |
504 | if (negotiate_nvsp_ver(device, net_device, init_packet, | |
505 | ver_list[i]) == 0) { | |
506 | net_device->nvsp_version = ver_list[i]; | |
507 | break; | |
508 | } | |
509 | ||
510 | if (i < 0) { | |
0f48c72c | 511 | ret = -EPROTO; |
0c3b7b2f | 512 | goto cleanup; |
fceaf24a | 513 | } |
f157e78d HZ |
514 | |
515 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
516 | ||
454f18a9 | 517 | /* Send the ndis version */ |
85799a37 | 518 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 519 | |
a1eabb01 | 520 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 521 | ndis_version = 0x00060001; |
a1eabb01 HZ |
522 | else |
523 | ndis_version = 0x0006001e; | |
fceaf24a | 524 | |
53d21fdb HZ |
525 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
526 | init_packet->msg.v1_msg. | |
527 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 528 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
529 | init_packet->msg.v1_msg. |
530 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 531 | ndis_version & 0xFFFF; |
fceaf24a | 532 | |
454f18a9 | 533 | /* Send the init request */ |
85799a37 | 534 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
535 | sizeof(struct nvsp_message), |
536 | (unsigned long)init_packet, | |
537 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 538 | if (ret != 0) |
0c3b7b2f | 539 | goto cleanup; |
454f18a9 BP |
540 | |
541 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
542 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
543 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
544 | else | |
545 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 546 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 547 | |
c25aaf81 | 548 | ret = netvsc_init_buf(device); |
fceaf24a | 549 | |
0c3b7b2f | 550 | cleanup: |
fceaf24a HJ |
551 | return ret; |
552 | } | |
553 | ||
3d541ac5 | 554 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 555 | { |
3d541ac5 | 556 | netvsc_destroy_buf(device); |
fceaf24a HJ |
557 | } |
558 | ||
3e189519 | 559 | /* |
5a71ae30 | 560 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 561 | */ |
905620d1 | 562 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 563 | { |
3d541ac5 VK |
564 | struct net_device *ndev = hv_get_drvdata(device); |
565 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
566 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
fceaf24a | 567 | |
3d541ac5 | 568 | netvsc_disconnect_vsp(device); |
9d88f33a | 569 | |
3d541ac5 | 570 | net_device_ctx->nvdev = NULL; |
3852409b | 571 | |
86c921af S |
572 | /* |
573 | * At this point, no one should be accessing net_device | |
574 | * except in here | |
575 | */ | |
c909ebbd | 576 | dev_notice(&device->device, "net device safe to remove\n"); |
fceaf24a | 577 | |
454f18a9 | 578 | /* Now, we can close the channel safely */ |
85799a37 | 579 | vmbus_close(device->channel); |
fceaf24a | 580 | |
454f18a9 | 581 | /* Release all resources */ |
aa99c479 | 582 | vfree(net_device->sub_cb_buf); |
f90251c8 | 583 | free_netvsc_device(net_device); |
21a80820 | 584 | return 0; |
fceaf24a HJ |
585 | } |
586 | ||
33be96e4 HZ |
587 | |
588 | #define RING_AVAIL_PERCENT_HIWATER 20 | |
589 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
590 | ||
591 | /* | |
592 | * Get the percentage of available bytes to write in the ring. | |
593 | * The return value is in range from 0 to 100. | |
594 | */ | |
595 | static inline u32 hv_ringbuf_avail_percent( | |
596 | struct hv_ring_buffer_info *ring_info) | |
597 | { | |
598 | u32 avail_read, avail_write; | |
599 | ||
600 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
601 | ||
602 | return avail_write * 100 / ring_info->ring_datasize; | |
603 | } | |
604 | ||
c25aaf81 KS |
605 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
606 | u32 index) | |
607 | { | |
608 | sync_change_bit(index, net_device->send_section_map); | |
609 | } | |
610 | ||
97c1723a | 611 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 612 | struct vmbus_channel *incoming_channel, |
97c1723a | 613 | struct hv_device *device, |
85799a37 | 614 | struct vmpacket_descriptor *packet) |
fceaf24a | 615 | { |
85799a37 HZ |
616 | struct nvsp_message *nvsp_packet; |
617 | struct hv_netvsc_packet *nvsc_packet; | |
3d541ac5 VK |
618 | struct net_device *ndev = hv_get_drvdata(device); |
619 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
c25aaf81 | 620 | u32 send_index; |
3a3d9a0a | 621 | struct sk_buff *skb; |
fceaf24a | 622 | |
85799a37 | 623 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 624 | (packet->offset8 << 3)); |
fceaf24a | 625 | |
53d21fdb HZ |
626 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
627 | (nvsp_packet->hdr.msg_type == | |
628 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
629 | (nvsp_packet->hdr.msg_type == | |
5b54dac8 HZ |
630 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
631 | (nvsp_packet->hdr.msg_type == | |
632 | NVSP_MSG5_TYPE_SUBCHANNEL)) { | |
454f18a9 | 633 | /* Copy the response back */ |
53d21fdb | 634 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 635 | sizeof(struct nvsp_message)); |
35abb21a | 636 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
637 | } else if (nvsp_packet->hdr.msg_type == |
638 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
33be96e4 | 639 | int num_outstanding_sends; |
5b54dac8 HZ |
640 | u16 q_idx = 0; |
641 | struct vmbus_channel *channel = device->channel; | |
642 | int queue_sends; | |
33be96e4 | 643 | |
454f18a9 | 644 | /* Get the send context */ |
3a3d9a0a | 645 | skb = (struct sk_buff *)(unsigned long)packet->trans_id; |
fceaf24a | 646 | |
454f18a9 | 647 | /* Notify the layer above us */ |
3a3d9a0a KS |
648 | if (skb) { |
649 | nvsc_packet = (struct hv_netvsc_packet *) skb->cb; | |
c25aaf81 KS |
650 | send_index = nvsc_packet->send_buf_index; |
651 | if (send_index != NETVSC_INVALID_INDEX) | |
652 | netvsc_free_send_slot(net_device, send_index); | |
5b54dac8 | 653 | q_idx = nvsc_packet->q_idx; |
25b85ee8 | 654 | channel = incoming_channel; |
3a3d9a0a | 655 | dev_kfree_skb_any(skb); |
5b54dac8 | 656 | } |
fceaf24a | 657 | |
33be96e4 HZ |
658 | num_outstanding_sends = |
659 | atomic_dec_return(&net_device->num_outstanding_sends); | |
5b54dac8 HZ |
660 | queue_sends = atomic_dec_return(&net_device-> |
661 | queue_sends[q_idx]); | |
1d06825b | 662 | |
dc5cd894 HZ |
663 | if (net_device->destroy && num_outstanding_sends == 0) |
664 | wake_up(&net_device->wait_drain); | |
665 | ||
5b54dac8 | 666 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
3d541ac5 | 667 | !net_device_ctx->start_remove && |
5b54dac8 HZ |
668 | (hv_ringbuf_avail_percent(&channel->outbound) > |
669 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) | |
670 | netif_tx_wake_queue(netdev_get_tx_queue( | |
671 | ndev, q_idx)); | |
21a80820 | 672 | } else { |
d9871158 | 673 | netdev_err(ndev, "Unknown send completion packet type- " |
c909ebbd | 674 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
675 | } |
676 | ||
fceaf24a HJ |
677 | } |
678 | ||
c25aaf81 KS |
679 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
680 | { | |
681 | unsigned long index; | |
682 | u32 max_words = net_device->map_words; | |
683 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; | |
684 | u32 section_cnt = net_device->send_section_cnt; | |
685 | int ret_val = NETVSC_INVALID_INDEX; | |
686 | int i; | |
687 | int prev_val; | |
688 | ||
689 | for (i = 0; i < max_words; i++) { | |
690 | if (!~(map_addr[i])) | |
691 | continue; | |
692 | index = ffz(map_addr[i]); | |
693 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); | |
694 | if (prev_val) | |
695 | continue; | |
696 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) | |
697 | break; | |
698 | ret_val = (index + (i * BITS_PER_LONG)); | |
699 | break; | |
700 | } | |
701 | return ret_val; | |
702 | } | |
703 | ||
da19fcd0 LP |
704 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
705 | unsigned int section_index, | |
7c3877f2 | 706 | u32 pend_size, |
24476760 | 707 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 708 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
709 | struct hv_page_buffer **pb, |
710 | struct sk_buff *skb) | |
c25aaf81 KS |
711 | { |
712 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
713 | char *dest = start + (section_index * net_device->send_section_size) |
714 | + pend_size; | |
c25aaf81 | 715 | int i; |
694a9fb0 | 716 | bool is_data_pkt = (skb != NULL) ? true : false; |
bde79be5 | 717 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 718 | u32 msg_size = 0; |
7c3877f2 HZ |
719 | u32 padding = 0; |
720 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
721 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
722 | packet->page_buf_cnt; | |
7c3877f2 HZ |
723 | |
724 | /* Add padding */ | |
bde79be5 | 725 | if (is_data_pkt && xmit_more && remain && |
aa0a34be | 726 | !packet->cp_partial) { |
7c3877f2 | 727 | padding = net_device->pkt_align - remain; |
24476760 | 728 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
729 | packet->total_data_buflen += padding; |
730 | } | |
c25aaf81 | 731 | |
aa0a34be | 732 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
733 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
734 | u32 offset = (*pb)[i].offset; | |
735 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
736 | |
737 | memcpy(dest, (src + offset), len); | |
738 | msg_size += len; | |
739 | dest += len; | |
740 | } | |
7c3877f2 HZ |
741 | |
742 | if (padding) { | |
743 | memset(dest, 0, padding); | |
744 | msg_size += padding; | |
745 | } | |
746 | ||
c25aaf81 KS |
747 | return msg_size; |
748 | } | |
749 | ||
7c3877f2 | 750 | static inline int netvsc_send_pkt( |
0a1275ca | 751 | struct hv_device *device, |
7c3877f2 | 752 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 753 | struct netvsc_device *net_device, |
3a3d9a0a KS |
754 | struct hv_page_buffer **pb, |
755 | struct sk_buff *skb) | |
fceaf24a | 756 | { |
7c3877f2 | 757 | struct nvsp_message nvmsg; |
3a67c9cc | 758 | u16 q_idx = packet->q_idx; |
8b9fbe1a | 759 | struct vmbus_channel *out_channel = net_device->chn_table[q_idx]; |
0a1275ca | 760 | struct net_device *ndev = hv_get_drvdata(device); |
7c3877f2 HZ |
761 | u64 req_id; |
762 | int ret; | |
aa0a34be | 763 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 764 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
bde79be5 | 765 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
c25aaf81 | 766 | |
7c3877f2 | 767 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 768 | if (skb != NULL) { |
21a80820 | 769 | /* 0 is RMC_DATA; */ |
7c3877f2 | 770 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
771 | } else { |
772 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 773 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 774 | } |
fceaf24a | 775 | |
7c3877f2 HZ |
776 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
777 | packet->send_buf_index; | |
778 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
779 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
780 | else | |
781 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
782 | packet->total_data_buflen; | |
21a80820 | 783 | |
3a3d9a0a | 784 | req_id = (ulong)skb; |
f1ea3cd7 | 785 | |
c3582a2c HZ |
786 | if (out_channel->rescind) |
787 | return -ENODEV; | |
788 | ||
82fa3c77 KS |
789 | /* |
790 | * It is possible that once we successfully place this packet | |
791 | * on the ringbuffer, we may stop the queue. In that case, we want | |
792 | * to notify the host independent of the xmit_more flag. We don't | |
793 | * need to be precise here; in the worst case we may signal the host | |
794 | * unnecessarily. | |
795 | */ | |
796 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) | |
bde79be5 | 797 | xmit_more = false; |
82fa3c77 | 798 | |
72a2f5bd | 799 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
800 | pgbuf = packet->cp_partial ? (*pb) + |
801 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
802 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
803 | pgbuf, | |
804 | packet->page_buf_cnt, | |
805 | &nvmsg, | |
806 | sizeof(struct nvsp_message), | |
807 | req_id, | |
808 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 809 | !xmit_more); |
21a80820 | 810 | } else { |
82fa3c77 KS |
811 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
812 | sizeof(struct nvsp_message), | |
813 | req_id, | |
814 | VM_PKT_DATA_INBAND, | |
815 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, | |
bde79be5 | 816 | !xmit_more); |
fceaf24a HJ |
817 | } |
818 | ||
1d06825b HZ |
819 | if (ret == 0) { |
820 | atomic_inc(&net_device->num_outstanding_sends); | |
3a67c9cc | 821 | atomic_inc(&net_device->queue_sends[q_idx]); |
5b54dac8 | 822 | |
82fa3c77 KS |
823 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
824 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); | |
5b54dac8 | 825 | |
33be96e4 | 826 | if (atomic_read(&net_device-> |
3a67c9cc | 827 | queue_sends[q_idx]) < 1) |
5b54dac8 | 828 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 829 | ndev, q_idx)); |
33be96e4 | 830 | } |
1d06825b | 831 | } else if (ret == -EAGAIN) { |
5b54dac8 | 832 | netif_tx_stop_queue(netdev_get_tx_queue( |
3a67c9cc KS |
833 | ndev, q_idx)); |
834 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { | |
5b54dac8 | 835 | netif_tx_wake_queue(netdev_get_tx_queue( |
3a67c9cc | 836 | ndev, q_idx)); |
33be96e4 HZ |
837 | ret = -ENOSPC; |
838 | } | |
1d06825b | 839 | } else { |
d9871158 | 840 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 841 | packet, ret); |
1d06825b | 842 | } |
fceaf24a | 843 | |
7c3877f2 HZ |
844 | return ret; |
845 | } | |
846 | ||
c85e4924 HZ |
847 | /* Move packet out of multi send data (msd), and clear msd */ |
848 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
849 | struct sk_buff **msd_skb, | |
850 | struct multi_send_data *msdp) | |
851 | { | |
852 | *msd_skb = msdp->skb; | |
853 | *msd_send = msdp->pkt; | |
854 | msdp->skb = NULL; | |
855 | msdp->pkt = NULL; | |
856 | msdp->count = 0; | |
857 | } | |
858 | ||
7c3877f2 | 859 | int netvsc_send(struct hv_device *device, |
24476760 | 860 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 861 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
862 | struct hv_page_buffer **pb, |
863 | struct sk_buff *skb) | |
7c3877f2 HZ |
864 | { |
865 | struct netvsc_device *net_device; | |
866 | int ret = 0, m_ret = 0; | |
867 | struct vmbus_channel *out_channel; | |
868 | u16 q_idx = packet->q_idx; | |
869 | u32 pktlen = packet->total_data_buflen, msd_len = 0; | |
870 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
871 | struct multi_send_data *msdp; |
872 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 873 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 874 | bool try_batch; |
bde79be5 | 875 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
876 | |
877 | net_device = get_outbound_net_device(device); | |
878 | if (!net_device) | |
879 | return -ENODEV; | |
880 | ||
8b9fbe1a | 881 | out_channel = net_device->chn_table[q_idx]; |
25b85ee8 | 882 | |
7c3877f2 | 883 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 884 | packet->cp_partial = false; |
7c3877f2 | 885 | |
cf8190e4 HZ |
886 | /* Send control message directly without accessing msd (Multi-Send |
887 | * Data) field which may be changed during data packet processing. | |
888 | */ | |
889 | if (!skb) { | |
890 | cur_send = packet; | |
891 | goto send_now; | |
892 | } | |
893 | ||
7c3877f2 HZ |
894 | msdp = &net_device->msd[q_idx]; |
895 | ||
896 | /* batch packets in send buffer if possible */ | |
7c3877f2 HZ |
897 | if (msdp->pkt) |
898 | msd_len = msdp->pkt->total_data_buflen; | |
899 | ||
694a9fb0 | 900 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
aa0a34be HZ |
901 | net_device->max_pkt; |
902 | ||
903 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
904 | net_device->send_section_size) { |
905 | section_index = msdp->pkt->send_buf_index; | |
906 | ||
aa0a34be HZ |
907 | } else if (try_batch && msd_len + packet->rmsg_size < |
908 | net_device->send_section_size) { | |
909 | section_index = msdp->pkt->send_buf_index; | |
910 | packet->cp_partial = true; | |
911 | ||
694a9fb0 | 912 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
7c3877f2 HZ |
913 | net_device->send_section_size) { |
914 | section_index = netvsc_get_next_send_section(net_device); | |
915 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
916 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
917 | msd_len = 0; | |
7c3877f2 HZ |
918 | } |
919 | } | |
920 | ||
921 | if (section_index != NETVSC_INVALID_INDEX) { | |
922 | netvsc_copy_to_send_buf(net_device, | |
923 | section_index, msd_len, | |
694a9fb0 | 924 | packet, rndis_msg, pb, skb); |
b08cc791 | 925 | |
7c3877f2 | 926 | packet->send_buf_index = section_index; |
aa0a34be HZ |
927 | |
928 | if (packet->cp_partial) { | |
929 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
930 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
931 | } else { | |
932 | packet->page_buf_cnt = 0; | |
933 | packet->total_data_buflen += msd_len; | |
aa0a34be | 934 | } |
7c3877f2 | 935 | |
c85e4924 HZ |
936 | if (msdp->skb) |
937 | dev_kfree_skb_any(msdp->skb); | |
ee90b812 | 938 | |
bde79be5 | 939 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 940 | msdp->skb = skb; |
7c3877f2 HZ |
941 | msdp->pkt = packet; |
942 | msdp->count++; | |
943 | } else { | |
944 | cur_send = packet; | |
c85e4924 | 945 | msdp->skb = NULL; |
7c3877f2 HZ |
946 | msdp->pkt = NULL; |
947 | msdp->count = 0; | |
948 | } | |
949 | } else { | |
c85e4924 | 950 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
951 | cur_send = packet; |
952 | } | |
953 | ||
7c3877f2 | 954 | if (msd_send) { |
0a1275ca VK |
955 | m_ret = netvsc_send_pkt(device, msd_send, net_device, |
956 | NULL, msd_skb); | |
7c3877f2 HZ |
957 | |
958 | if (m_ret != 0) { | |
959 | netvsc_free_send_slot(net_device, | |
960 | msd_send->send_buf_index); | |
c85e4924 | 961 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
962 | } |
963 | } | |
964 | ||
cf8190e4 | 965 | send_now: |
7c3877f2 | 966 | if (cur_send) |
0a1275ca | 967 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 968 | |
7aab5159 JS |
969 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
970 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 971 | |
fceaf24a HJ |
972 | return ret; |
973 | } | |
974 | ||
5fa9d3c5 | 975 | static void netvsc_send_recv_completion(struct hv_device *device, |
5b54dac8 | 976 | struct vmbus_channel *channel, |
97c1723a | 977 | struct netvsc_device *net_device, |
63f6921d | 978 | u64 transaction_id, u32 status) |
5fa9d3c5 HZ |
979 | { |
980 | struct nvsp_message recvcompMessage; | |
981 | int retries = 0; | |
982 | int ret; | |
0a1275ca | 983 | struct net_device *ndev = hv_get_drvdata(device); |
5fa9d3c5 HZ |
984 | |
985 | recvcompMessage.hdr.msg_type = | |
986 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
987 | ||
63f6921d | 988 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 HZ |
989 | |
990 | retry_send_cmplt: | |
991 | /* Send the completion */ | |
5b54dac8 | 992 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
5fa9d3c5 HZ |
993 | sizeof(struct nvsp_message), transaction_id, |
994 | VM_PKT_COMP, 0); | |
995 | if (ret == 0) { | |
996 | /* success */ | |
997 | /* no-op */ | |
d2598f01 | 998 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
999 | /* no more room...wait a bit and attempt to retry 3 times */ |
1000 | retries++; | |
d9871158 | 1001 | netdev_err(ndev, "unable to send receive completion pkt" |
c909ebbd | 1002 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
5fa9d3c5 HZ |
1003 | |
1004 | if (retries < 4) { | |
1005 | udelay(100); | |
1006 | goto retry_send_cmplt; | |
1007 | } else { | |
d9871158 | 1008 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1009 | "completion pkt (tid %llx)...give up retrying\n", |
5fa9d3c5 HZ |
1010 | transaction_id); |
1011 | } | |
1012 | } else { | |
d9871158 | 1013 | netdev_err(ndev, "unable to send receive " |
c909ebbd | 1014 | "completion pkt - %llx\n", transaction_id); |
5fa9d3c5 HZ |
1015 | } |
1016 | } | |
1017 | ||
97c1723a | 1018 | static void netvsc_receive(struct netvsc_device *net_device, |
5b54dac8 | 1019 | struct vmbus_channel *channel, |
97c1723a KS |
1020 | struct hv_device *device, |
1021 | struct vmpacket_descriptor *packet) | |
fceaf24a | 1022 | { |
85799a37 HZ |
1023 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
1024 | struct nvsp_message *nvsp_packet; | |
4baab261 HZ |
1025 | struct hv_netvsc_packet nv_pkt; |
1026 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; | |
1027 | u32 status = NVSP_STAT_SUCCESS; | |
45326342 HZ |
1028 | int i; |
1029 | int count = 0; | |
0a1275ca | 1030 | struct net_device *ndev = hv_get_drvdata(device); |
c4b20c63 | 1031 | void *data; |
779b4d17 | 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; | |
0a1275ca | 1088 | struct net_device *ndev = hv_get_drvdata(hdev); |
5b54dac8 HZ |
1089 | int i; |
1090 | u32 count, *tab; | |
1091 | ||
1092 | nvscdev = get_outbound_net_device(hdev); | |
1093 | if (!nvscdev) | |
1094 | return; | |
5b54dac8 | 1095 | |
5b54dac8 HZ |
1096 | count = nvmsg->msg.v5_msg.send_table.count; |
1097 | if (count != VRSS_SEND_TAB_SIZE) { | |
1098 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1099 | return; | |
1100 | } | |
1101 | ||
1102 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1103 | nvmsg->msg.v5_msg.send_table.offset); | |
1104 | ||
1105 | for (i = 0; i < count; i++) | |
1106 | nvscdev->send_table[i] = tab[i]; | |
1107 | } | |
1108 | ||
f9a7da91 | 1109 | static void netvsc_send_vf(struct net_device_context *net_device_ctx, |
71790a27 HZ |
1110 | struct nvsp_message *nvmsg) |
1111 | { | |
f9a7da91 VK |
1112 | net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
1113 | net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
71790a27 HZ |
1114 | } |
1115 | ||
1116 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
f9a7da91 VK |
1117 | struct net_device_context *net_device_ctx, |
1118 | struct nvsp_message *nvmsg) | |
71790a27 HZ |
1119 | { |
1120 | switch (nvmsg->hdr.msg_type) { | |
1121 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1122 | netvsc_send_table(hdev, nvmsg); | |
1123 | break; | |
1124 | ||
1125 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
f9a7da91 | 1126 | netvsc_send_vf(net_device_ctx, nvmsg); |
71790a27 HZ |
1127 | break; |
1128 | } | |
1129 | } | |
1130 | ||
99a50bb1 S |
1131 | static void netvsc_process_raw_pkt(struct hv_device *device, |
1132 | struct vmbus_channel *channel, | |
1133 | struct netvsc_device *net_device, | |
1134 | struct net_device *ndev, | |
1135 | u64 request_id, | |
1136 | struct vmpacket_descriptor *desc) | |
1137 | { | |
1138 | struct nvsp_message *nvmsg; | |
f9a7da91 | 1139 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
99a50bb1 S |
1140 | |
1141 | nvmsg = (struct nvsp_message *)((unsigned long) | |
1142 | desc + (desc->offset8 << 3)); | |
1143 | ||
1144 | switch (desc->type) { | |
1145 | case VM_PKT_COMP: | |
1146 | netvsc_send_completion(net_device, channel, device, desc); | |
1147 | break; | |
1148 | ||
1149 | case VM_PKT_DATA_USING_XFER_PAGES: | |
1150 | netvsc_receive(net_device, channel, device, desc); | |
1151 | break; | |
1152 | ||
1153 | case VM_PKT_DATA_INBAND: | |
f9a7da91 | 1154 | netvsc_receive_inband(device, net_device_ctx, nvmsg); |
99a50bb1 S |
1155 | break; |
1156 | ||
1157 | default: | |
1158 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", | |
1159 | desc->type, request_id); | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | ||
5b54dac8 | 1165 | void netvsc_channel_cb(void *context) |
fceaf24a | 1166 | { |
21a80820 | 1167 | int ret; |
5b54dac8 HZ |
1168 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
1169 | struct hv_device *device; | |
85799a37 HZ |
1170 | struct netvsc_device *net_device; |
1171 | u32 bytes_recvd; | |
1172 | u64 request_id; | |
8dc0a06a | 1173 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1174 | unsigned char *buffer; |
1175 | int bufferlen = NETVSC_PACKET_SIZE; | |
2ddd5e5f | 1176 | struct net_device *ndev; |
99a50bb1 | 1177 | bool need_to_commit = false; |
fceaf24a | 1178 | |
5b54dac8 HZ |
1179 | if (channel->primary_channel != NULL) |
1180 | device = channel->primary_channel->device_obj; | |
1181 | else | |
1182 | device = channel->device_obj; | |
1183 | ||
5a71ae30 | 1184 | net_device = get_inbound_net_device(device); |
2ddd5e5f | 1185 | if (!net_device) |
ee0c4c39 | 1186 | return; |
0a1275ca | 1187 | ndev = hv_get_drvdata(device); |
5b54dac8 | 1188 | buffer = get_per_channel_state(channel); |
fceaf24a | 1189 | |
21a80820 | 1190 | do { |
99a50bb1 S |
1191 | desc = get_next_pkt_raw(channel); |
1192 | if (desc != NULL) { | |
1193 | netvsc_process_raw_pkt(device, | |
1194 | channel, | |
1195 | net_device, | |
1196 | ndev, | |
1197 | desc->trans_id, | |
1198 | desc); | |
1199 | ||
1200 | put_pkt_raw(channel, desc); | |
1201 | need_to_commit = true; | |
1202 | continue; | |
1203 | } | |
1204 | if (need_to_commit) { | |
1205 | need_to_commit = false; | |
1206 | commit_rd_index(channel); | |
1207 | } | |
1208 | ||
5b54dac8 | 1209 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
85799a37 | 1210 | &bytes_recvd, &request_id); |
21a80820 | 1211 | if (ret == 0) { |
85799a37 | 1212 | if (bytes_recvd > 0) { |
21a80820 | 1213 | desc = (struct vmpacket_descriptor *)buffer; |
99a50bb1 S |
1214 | netvsc_process_raw_pkt(device, |
1215 | channel, | |
1216 | net_device, | |
1217 | ndev, | |
1218 | request_id, | |
1219 | desc); | |
1220 | ||
fceaf24a | 1221 | |
21a80820 | 1222 | } else { |
ee0c4c39 KS |
1223 | /* |
1224 | * We are done for this pass. | |
1225 | */ | |
fceaf24a HJ |
1226 | break; |
1227 | } | |
ee0c4c39 | 1228 | |
3d5cad97 | 1229 | } else if (ret == -ENOBUFS) { |
ee0c4c39 KS |
1230 | if (bufferlen > NETVSC_PACKET_SIZE) |
1231 | kfree(buffer); | |
21a80820 | 1232 | /* Handle large packet */ |
85799a37 | 1233 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1234 | if (buffer == NULL) { |
454f18a9 | 1235 | /* Try again next time around */ |
d9871158 | 1236 | netdev_err(ndev, |
21a80820 | 1237 | "unable to allocate buffer of size " |
c909ebbd | 1238 | "(%d)!!\n", bytes_recvd); |
fceaf24a HJ |
1239 | break; |
1240 | } | |
1241 | ||
85799a37 | 1242 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1243 | } |
1244 | } while (1); | |
1245 | ||
ee0c4c39 KS |
1246 | if (bufferlen > NETVSC_PACKET_SIZE) |
1247 | kfree(buffer); | |
fceaf24a HJ |
1248 | return; |
1249 | } | |
af24ce42 | 1250 | |
b637e023 HZ |
1251 | /* |
1252 | * netvsc_device_add - Callback when the device belonging to this | |
1253 | * driver is added | |
1254 | */ | |
7bd23a4d | 1255 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 | 1256 | { |
88098834 | 1257 | int i, ret = 0; |
aae23986 S |
1258 | int ring_size = |
1259 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 | 1260 | struct netvsc_device *net_device; |
88098834 VK |
1261 | struct net_device *ndev = hv_get_drvdata(device); |
1262 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1263 | |
88098834 | 1264 | net_device = alloc_net_device(); |
b1c84927 DC |
1265 | if (!net_device) |
1266 | return -ENOMEM; | |
b637e023 | 1267 | |
5b54dac8 HZ |
1268 | net_device->ring_size = ring_size; |
1269 | ||
b637e023 | 1270 | /* Initialize the NetVSC channel extension */ |
35abb21a | 1271 | init_completion(&net_device->channel_init_wait); |
b637e023 | 1272 | |
5b54dac8 HZ |
1273 | set_per_channel_state(device->channel, net_device->cb_buffer); |
1274 | ||
b637e023 | 1275 | /* Open the channel */ |
aae23986 S |
1276 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1277 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1278 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1279 | |
1280 | if (ret != 0) { | |
d9871158 | 1281 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1282 | goto cleanup; |
1283 | } | |
1284 | ||
1285 | /* Channel is opened */ | |
c909ebbd | 1286 | pr_info("hv_netvsc channel opened successfully\n"); |
b637e023 | 1287 | |
88098834 VK |
1288 | /* If we're reopening the device we may have multiple queues, fill the |
1289 | * chn_table with the default channel to use it before subchannels are | |
1290 | * opened. | |
1291 | */ | |
1292 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
1293 | net_device->chn_table[i] = device->channel; | |
1294 | ||
1295 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is | |
1296 | * populated. | |
1297 | */ | |
1298 | wmb(); | |
1299 | ||
1300 | net_device_ctx->nvdev = net_device; | |
5b54dac8 | 1301 | |
b637e023 HZ |
1302 | /* Connect with the NetVsp */ |
1303 | ret = netvsc_connect_vsp(device); | |
1304 | if (ret != 0) { | |
d9871158 | 1305 | netdev_err(ndev, |
c909ebbd | 1306 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1307 | goto close; |
1308 | } | |
1309 | ||
1310 | return ret; | |
1311 | ||
1312 | close: | |
1313 | /* Now, we can close the channel safely */ | |
1314 | vmbus_close(device->channel); | |
1315 | ||
1316 | cleanup: | |
f90251c8 | 1317 | free_netvsc_device(net_device); |
b637e023 HZ |
1318 | |
1319 | return ret; | |
1320 | } |