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); | |
53fa1a6f HZ |
60 | |
61 | net_device_ctx->datapath = vf; | |
84bf9cef KS |
62 | } |
63 | ||
88098834 | 64 | static struct netvsc_device *alloc_net_device(void) |
fceaf24a | 65 | { |
85799a37 | 66 | struct netvsc_device *net_device; |
fceaf24a | 67 | |
85799a37 HZ |
68 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
69 | if (!net_device) | |
fceaf24a HJ |
70 | return NULL; |
71 | ||
b8b835a8 | 72 | net_device->chan_table[0].mrc.buf |
73 | = vzalloc(NETVSC_RECVSLOT_MAX * sizeof(struct recv_comp_data)); | |
c0b558e5 | 74 | |
dc5cd894 | 75 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 76 | net_device->destroy = false; |
84bf9cef | 77 | atomic_set(&net_device->open_cnt, 0); |
7c3877f2 HZ |
78 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
79 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
fd612602 | 80 | init_completion(&net_device->channel_init_wait); |
7c3877f2 | 81 | |
85799a37 | 82 | return net_device; |
fceaf24a HJ |
83 | } |
84 | ||
545a8e79 | 85 | static void free_netvsc_device(struct rcu_head *head) |
f90251c8 | 86 | { |
545a8e79 | 87 | struct netvsc_device *nvdev |
88 | = container_of(head, struct netvsc_device, rcu); | |
c0b558e5 HZ |
89 | int i; |
90 | ||
91 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
b8b835a8 | 92 | vfree(nvdev->chan_table[i].mrc.buf); |
c0b558e5 | 93 | |
f90251c8 HZ |
94 | kfree(nvdev); |
95 | } | |
96 | ||
545a8e79 | 97 | static void free_netvsc_device_rcu(struct netvsc_device *nvdev) |
98 | { | |
99 | call_rcu(&nvdev->rcu, free_netvsc_device); | |
100 | } | |
fceaf24a | 101 | |
7a2a0a84 | 102 | static void netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
103 | { |
104 | struct nvsp_message *revoke_packet; | |
3d541ac5 | 105 | struct net_device *ndev = hv_get_drvdata(device); |
2625466d | 106 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); |
7a2a0a84 | 107 | int ret; |
ec91cd09 HZ |
108 | |
109 | /* | |
110 | * If we got a section count, it means we received a | |
111 | * SendReceiveBufferComplete msg (ie sent | |
112 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
113 | * to send a revoke msg here | |
114 | */ | |
115 | if (net_device->recv_section_cnt) { | |
116 | /* Send the revoke receive buffer */ | |
117 | revoke_packet = &net_device->revoke_packet; | |
118 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
119 | ||
120 | revoke_packet->hdr.msg_type = | |
121 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
122 | revoke_packet->msg.v1_msg. | |
123 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
124 | ||
3d541ac5 | 125 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
126 | revoke_packet, |
127 | sizeof(struct nvsp_message), | |
128 | (unsigned long)revoke_packet, | |
129 | VM_PKT_DATA_INBAND, 0); | |
73e64fa4 S |
130 | /* If the failure is because the channel is rescinded; |
131 | * ignore the failure since we cannot send on a rescinded | |
132 | * channel. This would allow us to properly cleanup | |
133 | * even when the channel is rescinded. | |
134 | */ | |
135 | if (device->channel->rescind) | |
136 | ret = 0; | |
ec91cd09 HZ |
137 | /* |
138 | * If we failed here, we might as well return and | |
139 | * have a leak rather than continue and a bugchk | |
140 | */ | |
141 | if (ret != 0) { | |
d9871158 | 142 | netdev_err(ndev, "unable to send " |
c909ebbd | 143 | "revoke receive buffer to netvsp\n"); |
7a2a0a84 | 144 | return; |
ec91cd09 HZ |
145 | } |
146 | } | |
147 | ||
148 | /* Teardown the gpadl on the vsp end */ | |
149 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
150 | ret = vmbus_teardown_gpadl(device->channel, |
151 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
152 | |
153 | /* If we failed here, we might as well return and have a leak | |
154 | * rather than continue and a bugchk | |
155 | */ | |
156 | if (ret != 0) { | |
d9871158 | 157 | netdev_err(ndev, |
c909ebbd | 158 | "unable to teardown receive buffer's gpadl\n"); |
7a2a0a84 | 159 | return; |
ec91cd09 HZ |
160 | } |
161 | net_device->recv_buf_gpadl_handle = 0; | |
162 | } | |
163 | ||
164 | if (net_device->recv_buf) { | |
165 | /* Free up the receive buffer */ | |
b679ef73 | 166 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
167 | net_device->recv_buf = NULL; |
168 | } | |
169 | ||
170 | if (net_device->recv_section) { | |
171 | net_device->recv_section_cnt = 0; | |
172 | kfree(net_device->recv_section); | |
173 | net_device->recv_section = NULL; | |
174 | } | |
175 | ||
c25aaf81 KS |
176 | /* Deal with the send buffer we may have setup. |
177 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
178 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
179 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
180 | * to send a revoke msg here |
181 | */ | |
182 | if (net_device->send_section_size) { | |
183 | /* Send the revoke receive buffer */ | |
184 | revoke_packet = &net_device->revoke_packet; | |
185 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
186 | ||
187 | revoke_packet->hdr.msg_type = | |
188 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
189 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
190 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 191 | |
3d541ac5 | 192 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
193 | revoke_packet, |
194 | sizeof(struct nvsp_message), | |
195 | (unsigned long)revoke_packet, | |
196 | VM_PKT_DATA_INBAND, 0); | |
73e64fa4 S |
197 | |
198 | /* If the failure is because the channel is rescinded; | |
199 | * ignore the failure since we cannot send on a rescinded | |
200 | * channel. This would allow us to properly cleanup | |
201 | * even when the channel is rescinded. | |
202 | */ | |
203 | if (device->channel->rescind) | |
204 | ret = 0; | |
205 | ||
c25aaf81 KS |
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"); | |
7a2a0a84 | 212 | return; |
c25aaf81 KS |
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"); | |
7a2a0a84 | 226 | return; |
c25aaf81 | 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); | |
ec91cd09 HZ |
236 | } |
237 | ||
95790837 | 238 | static int netvsc_init_buf(struct hv_device *device, |
239 | struct netvsc_device *net_device) | |
fceaf24a | 240 | { |
21a80820 | 241 | int ret = 0; |
85799a37 | 242 | struct nvsp_message *init_packet; |
2ddd5e5f | 243 | struct net_device *ndev; |
fdfb70d2 | 244 | size_t map_words; |
0a726c2b | 245 | int node; |
fceaf24a | 246 | |
0a1275ca | 247 | ndev = hv_get_drvdata(device); |
fceaf24a | 248 | |
0a726c2b S |
249 | node = cpu_to_node(device->channel->target_cpu); |
250 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
251 | if (!net_device->recv_buf) | |
252 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
253 | ||
53d21fdb | 254 | if (!net_device->recv_buf) { |
d9871158 | 255 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 256 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 257 | ret = -ENOMEM; |
0c3b7b2f | 258 | goto cleanup; |
fceaf24a | 259 | } |
fceaf24a | 260 | |
454f18a9 BP |
261 | /* |
262 | * Establish the gpadl handle for this buffer on this | |
263 | * channel. Note: This call uses the vmbus connection rather | |
264 | * than the channel to establish the gpadl handle. | |
265 | */ | |
53d21fdb HZ |
266 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
267 | net_device->recv_buf_size, | |
268 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 269 | if (ret != 0) { |
d9871158 | 270 | netdev_err(ndev, |
c909ebbd | 271 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 272 | goto cleanup; |
fceaf24a HJ |
273 | } |
274 | ||
454f18a9 | 275 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 276 | init_packet = &net_device->channel_init_pkt; |
85799a37 | 277 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
278 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
279 | init_packet->msg.v1_msg.send_recv_buf. | |
280 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
281 | init_packet->msg.v1_msg. | |
282 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 283 | |
454f18a9 | 284 | /* Send the gpadl notification request */ |
85799a37 | 285 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 286 | sizeof(struct nvsp_message), |
85799a37 | 287 | (unsigned long)init_packet, |
415f2287 | 288 | VM_PKT_DATA_INBAND, |
5a4df290 | 289 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 290 | if (ret != 0) { |
d9871158 | 291 | netdev_err(ndev, |
c909ebbd | 292 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 293 | goto cleanup; |
fceaf24a HJ |
294 | } |
295 | ||
5362855a | 296 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 297 | |
454f18a9 | 298 | /* Check the response */ |
53d21fdb HZ |
299 | if (init_packet->msg.v1_msg. |
300 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 301 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 302 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
303 | init_packet->msg.v1_msg. |
304 | send_recv_buf_complete.status); | |
927bc33c | 305 | ret = -EINVAL; |
0c3b7b2f | 306 | goto cleanup; |
fceaf24a HJ |
307 | } |
308 | ||
454f18a9 | 309 | /* Parse the response */ |
fceaf24a | 310 | |
53d21fdb HZ |
311 | net_device->recv_section_cnt = init_packet->msg. |
312 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 313 | |
c1813200 HZ |
314 | net_device->recv_section = kmemdup( |
315 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
316 | net_device->recv_section_cnt * | |
317 | sizeof(struct nvsp_1_receive_buffer_section), | |
318 | GFP_KERNEL); | |
53d21fdb | 319 | if (net_device->recv_section == NULL) { |
927bc33c | 320 | ret = -EINVAL; |
0c3b7b2f | 321 | goto cleanup; |
fceaf24a HJ |
322 | } |
323 | ||
21a80820 GKH |
324 | /* |
325 | * For 1st release, there should only be 1 section that represents the | |
326 | * entire receive buffer | |
327 | */ | |
53d21fdb HZ |
328 | if (net_device->recv_section_cnt != 1 || |
329 | net_device->recv_section->offset != 0) { | |
927bc33c | 330 | ret = -EINVAL; |
0c3b7b2f | 331 | goto cleanup; |
fceaf24a HJ |
332 | } |
333 | ||
c25aaf81 KS |
334 | /* Now setup the send buffer. |
335 | */ | |
5defde59 S |
336 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
337 | if (!net_device->send_buf) | |
338 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
339 | if (!net_device->send_buf) { |
340 | netdev_err(ndev, "unable to allocate send " | |
341 | "buffer of size %d\n", net_device->send_buf_size); | |
342 | ret = -ENOMEM; | |
343 | goto cleanup; | |
344 | } | |
345 | ||
346 | /* Establish the gpadl handle for this buffer on this | |
347 | * channel. Note: This call uses the vmbus connection rather | |
348 | * than the channel to establish the gpadl handle. | |
349 | */ | |
350 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
351 | net_device->send_buf_size, | |
352 | &net_device->send_buf_gpadl_handle); | |
353 | if (ret != 0) { | |
354 | netdev_err(ndev, | |
355 | "unable to establish send buffer's gpadl\n"); | |
356 | goto cleanup; | |
357 | } | |
358 | ||
359 | /* Notify the NetVsp of the gpadl handle */ | |
360 | init_packet = &net_device->channel_init_pkt; | |
361 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
362 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 363 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 364 | net_device->send_buf_gpadl_handle; |
c51ed182 | 365 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
366 | |
367 | /* Send the gpadl notification request */ | |
368 | ret = vmbus_sendpacket(device->channel, init_packet, | |
369 | sizeof(struct nvsp_message), | |
370 | (unsigned long)init_packet, | |
371 | VM_PKT_DATA_INBAND, | |
372 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
373 | if (ret != 0) { | |
374 | netdev_err(ndev, | |
375 | "unable to send send buffer's gpadl to netvsp\n"); | |
376 | goto cleanup; | |
377 | } | |
378 | ||
5362855a | 379 | wait_for_completion(&net_device->channel_init_wait); |
c25aaf81 KS |
380 | |
381 | /* Check the response */ | |
382 | if (init_packet->msg.v1_msg. | |
383 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
384 | netdev_err(ndev, "Unable to complete send buffer " | |
385 | "initialization with NetVsp - status %d\n", | |
386 | init_packet->msg.v1_msg. | |
c51ed182 | 387 | send_send_buf_complete.status); |
c25aaf81 KS |
388 | ret = -EINVAL; |
389 | goto cleanup; | |
390 | } | |
391 | ||
392 | /* Parse the response */ | |
393 | net_device->send_section_size = init_packet->msg. | |
394 | v1_msg.send_send_buf_complete.section_size; | |
395 | ||
396 | /* Section count is simply the size divided by the section size. | |
397 | */ | |
398 | net_device->send_section_cnt = | |
796cc88c | 399 | net_device->send_buf_size / net_device->send_section_size; |
c25aaf81 | 400 | |
93ba2222 VK |
401 | netdev_dbg(ndev, "Send section size: %d, Section count:%d\n", |
402 | net_device->send_section_size, net_device->send_section_cnt); | |
c25aaf81 KS |
403 | |
404 | /* Setup state for managing the send buffer. */ | |
fdfb70d2 | 405 | map_words = DIV_ROUND_UP(net_device->send_section_cnt, BITS_PER_LONG); |
c25aaf81 | 406 | |
fdfb70d2 | 407 | net_device->send_section_map = kcalloc(map_words, sizeof(ulong), GFP_KERNEL); |
dd1d3f8f WY |
408 | if (net_device->send_section_map == NULL) { |
409 | ret = -ENOMEM; | |
c25aaf81 | 410 | goto cleanup; |
dd1d3f8f | 411 | } |
c25aaf81 | 412 | |
0c3b7b2f | 413 | goto exit; |
fceaf24a | 414 | |
0c3b7b2f | 415 | cleanup: |
3d541ac5 | 416 | netvsc_destroy_buf(device); |
fceaf24a | 417 | |
0c3b7b2f | 418 | exit: |
fceaf24a HJ |
419 | return ret; |
420 | } | |
421 | ||
f157e78d HZ |
422 | /* Negotiate NVSP protocol version */ |
423 | static int negotiate_nvsp_ver(struct hv_device *device, | |
424 | struct netvsc_device *net_device, | |
425 | struct nvsp_message *init_packet, | |
426 | u32 nvsp_ver) | |
fceaf24a | 427 | { |
0a1275ca | 428 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c | 429 | int ret; |
fceaf24a | 430 | |
85799a37 | 431 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 432 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
433 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
434 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 435 | |
454f18a9 | 436 | /* Send the init request */ |
85799a37 | 437 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 438 | sizeof(struct nvsp_message), |
85799a37 | 439 | (unsigned long)init_packet, |
415f2287 | 440 | VM_PKT_DATA_INBAND, |
5a4df290 | 441 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 442 | |
b8a3d52b | 443 | if (ret != 0) |
f157e78d | 444 | return ret; |
fceaf24a | 445 | |
5362855a | 446 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 447 | |
53d21fdb | 448 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
449 | NVSP_STAT_SUCCESS) |
450 | return -EINVAL; | |
fceaf24a | 451 | |
a1eabb01 | 452 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
453 | return 0; |
454 | ||
71790a27 | 455 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
456 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
457 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 458 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 459 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 460 | |
7f5d5af0 | 461 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) { |
71790a27 HZ |
462 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
463 | ||
7f5d5af0 HZ |
464 | /* Teaming bit is needed to receive link speed updates */ |
465 | init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1; | |
466 | } | |
467 | ||
f157e78d HZ |
468 | ret = vmbus_sendpacket(device->channel, init_packet, |
469 | sizeof(struct nvsp_message), | |
470 | (unsigned long)init_packet, | |
471 | VM_PKT_DATA_INBAND, 0); | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
95790837 | 476 | static int netvsc_connect_vsp(struct hv_device *device, |
477 | struct netvsc_device *net_device) | |
f157e78d | 478 | { |
e5a78fad SH |
479 | const u32 ver_list[] = { |
480 | NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, | |
95790837 | 481 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 |
482 | }; | |
483 | struct nvsp_message *init_packet; | |
484 | int ndis_version, i, ret; | |
f157e78d HZ |
485 | |
486 | init_packet = &net_device->channel_init_pkt; | |
487 | ||
488 | /* Negotiate the latest NVSP protocol supported */ | |
e5a78fad | 489 | for (i = ARRAY_SIZE(ver_list) - 1; i >= 0; i--) |
a1eabb01 HZ |
490 | if (negotiate_nvsp_ver(device, net_device, init_packet, |
491 | ver_list[i]) == 0) { | |
492 | net_device->nvsp_version = ver_list[i]; | |
493 | break; | |
494 | } | |
495 | ||
496 | if (i < 0) { | |
0f48c72c | 497 | ret = -EPROTO; |
0c3b7b2f | 498 | goto cleanup; |
fceaf24a | 499 | } |
f157e78d HZ |
500 | |
501 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
502 | ||
454f18a9 | 503 | /* Send the ndis version */ |
85799a37 | 504 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 505 | |
a1eabb01 | 506 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 507 | ndis_version = 0x00060001; |
a1eabb01 HZ |
508 | else |
509 | ndis_version = 0x0006001e; | |
fceaf24a | 510 | |
53d21fdb HZ |
511 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
512 | init_packet->msg.v1_msg. | |
513 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 514 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
515 | init_packet->msg.v1_msg. |
516 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 517 | ndis_version & 0xFFFF; |
fceaf24a | 518 | |
454f18a9 | 519 | /* Send the init request */ |
85799a37 | 520 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
521 | sizeof(struct nvsp_message), |
522 | (unsigned long)init_packet, | |
523 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 524 | if (ret != 0) |
0c3b7b2f | 525 | goto cleanup; |
454f18a9 BP |
526 | |
527 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
528 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
529 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
530 | else | |
531 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 532 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 533 | |
95790837 | 534 | ret = netvsc_init_buf(device, net_device); |
fceaf24a | 535 | |
0c3b7b2f | 536 | cleanup: |
fceaf24a HJ |
537 | return ret; |
538 | } | |
539 | ||
3d541ac5 | 540 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 541 | { |
3d541ac5 | 542 | netvsc_destroy_buf(device); |
fceaf24a HJ |
543 | } |
544 | ||
3e189519 | 545 | /* |
5a71ae30 | 546 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 547 | */ |
e08f3ea5 | 548 | void netvsc_device_remove(struct hv_device *device) |
fceaf24a | 549 | { |
3d541ac5 VK |
550 | struct net_device *ndev = hv_get_drvdata(device); |
551 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
552 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
15a863bf | 553 | int i; |
fceaf24a | 554 | |
3d541ac5 | 555 | netvsc_disconnect_vsp(device); |
9d88f33a | 556 | |
545a8e79 | 557 | RCU_INIT_POINTER(net_device_ctx->nvdev, NULL); |
3852409b | 558 | |
86c921af S |
559 | /* |
560 | * At this point, no one should be accessing net_device | |
561 | * except in here | |
562 | */ | |
93ba2222 | 563 | netdev_dbg(ndev, "net device safe to remove\n"); |
fceaf24a | 564 | |
454f18a9 | 565 | /* Now, we can close the channel safely */ |
85799a37 | 566 | vmbus_close(device->channel); |
fceaf24a | 567 | |
76bb5db5 | 568 | /* And dissassociate NAPI context from device */ |
79cd874c | 569 | for (i = 0; i < net_device->num_chn; i++) |
76bb5db5 | 570 | netif_napi_del(&net_device->chan_table[i].napi); |
15a863bf | 571 | |
454f18a9 | 572 | /* Release all resources */ |
545a8e79 | 573 | free_netvsc_device_rcu(net_device); |
fceaf24a HJ |
574 | } |
575 | ||
33be96e4 HZ |
576 | #define RING_AVAIL_PERCENT_HIWATER 20 |
577 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
578 | ||
579 | /* | |
580 | * Get the percentage of available bytes to write in the ring. | |
581 | * The return value is in range from 0 to 100. | |
582 | */ | |
583 | static inline u32 hv_ringbuf_avail_percent( | |
584 | struct hv_ring_buffer_info *ring_info) | |
585 | { | |
586 | u32 avail_read, avail_write; | |
587 | ||
588 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
589 | ||
590 | return avail_write * 100 / ring_info->ring_datasize; | |
591 | } | |
592 | ||
c25aaf81 KS |
593 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
594 | u32 index) | |
595 | { | |
596 | sync_change_bit(index, net_device->send_section_map); | |
597 | } | |
598 | ||
bc304dd3 SH |
599 | static void netvsc_send_tx_complete(struct netvsc_device *net_device, |
600 | struct vmbus_channel *incoming_channel, | |
601 | struct hv_device *device, | |
f9645430 | 602 | const struct vmpacket_descriptor *desc, |
603 | int budget) | |
bc304dd3 | 604 | { |
50698d80 | 605 | struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id; |
bc304dd3 | 606 | struct net_device *ndev = hv_get_drvdata(device); |
bc304dd3 | 607 | struct vmbus_channel *channel = device->channel; |
bc304dd3 SH |
608 | u16 q_idx = 0; |
609 | int queue_sends; | |
610 | ||
611 | /* Notify the layer above us */ | |
612 | if (likely(skb)) { | |
793e3955 | 613 | const struct hv_netvsc_packet *packet |
bc304dd3 | 614 | = (struct hv_netvsc_packet *)skb->cb; |
793e3955 | 615 | u32 send_index = packet->send_buf_index; |
616 | struct netvsc_stats *tx_stats; | |
bc304dd3 SH |
617 | |
618 | if (send_index != NETVSC_INVALID_INDEX) | |
619 | netvsc_free_send_slot(net_device, send_index); | |
793e3955 | 620 | q_idx = packet->q_idx; |
bc304dd3 SH |
621 | channel = incoming_channel; |
622 | ||
6c80f3fc | 623 | tx_stats = &net_device->chan_table[q_idx].tx_stats; |
793e3955 | 624 | |
625 | u64_stats_update_begin(&tx_stats->syncp); | |
626 | tx_stats->packets += packet->total_packets; | |
627 | tx_stats->bytes += packet->total_bytes; | |
628 | u64_stats_update_end(&tx_stats->syncp); | |
629 | ||
f9645430 | 630 | napi_consume_skb(skb, budget); |
bc304dd3 SH |
631 | } |
632 | ||
b8b835a8 | 633 | queue_sends = |
634 | atomic_dec_return(&net_device->chan_table[q_idx].queue_sends); | |
bc304dd3 | 635 | |
46b4f7f5 | 636 | if (net_device->destroy && queue_sends == 0) |
bc304dd3 SH |
637 | wake_up(&net_device->wait_drain); |
638 | ||
639 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && | |
bc304dd3 SH |
640 | (hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER || |
641 | queue_sends < 1)) | |
642 | netif_tx_wake_queue(netdev_get_tx_queue(ndev, q_idx)); | |
643 | } | |
644 | ||
97c1723a | 645 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 646 | struct vmbus_channel *incoming_channel, |
97c1723a | 647 | struct hv_device *device, |
f9645430 | 648 | const struct vmpacket_descriptor *desc, |
649 | int budget) | |
fceaf24a | 650 | { |
f3dd3f47 | 651 | struct nvsp_message *nvsp_packet = hv_pkt_data(desc); |
3d541ac5 | 652 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 653 | |
bc304dd3 SH |
654 | switch (nvsp_packet->hdr.msg_type) { |
655 | case NVSP_MSG_TYPE_INIT_COMPLETE: | |
656 | case NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE: | |
657 | case NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE: | |
658 | case NVSP_MSG5_TYPE_SUBCHANNEL: | |
454f18a9 | 659 | /* Copy the response back */ |
53d21fdb | 660 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 661 | sizeof(struct nvsp_message)); |
35abb21a | 662 | complete(&net_device->channel_init_wait); |
bc304dd3 SH |
663 | break; |
664 | ||
665 | case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: | |
666 | netvsc_send_tx_complete(net_device, incoming_channel, | |
f9645430 | 667 | device, desc, budget); |
bc304dd3 | 668 | break; |
fceaf24a | 669 | |
bc304dd3 SH |
670 | default: |
671 | netdev_err(ndev, | |
672 | "Unknown send completion type %d received!!\n", | |
673 | nvsp_packet->hdr.msg_type); | |
fceaf24a | 674 | } |
fceaf24a HJ |
675 | } |
676 | ||
c25aaf81 KS |
677 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
678 | { | |
b58a1858 | 679 | unsigned long *map_addr = net_device->send_section_map; |
680 | unsigned int i; | |
681 | ||
fdfb70d2 | 682 | for_each_clear_bit(i, map_addr, net_device->send_section_cnt) { |
b58a1858 | 683 | if (sync_test_and_set_bit(i, map_addr) == 0) |
684 | return i; | |
c25aaf81 | 685 | } |
b58a1858 | 686 | |
687 | return NETVSC_INVALID_INDEX; | |
c25aaf81 KS |
688 | } |
689 | ||
da19fcd0 LP |
690 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
691 | unsigned int section_index, | |
7c3877f2 | 692 | u32 pend_size, |
24476760 | 693 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 694 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
695 | struct hv_page_buffer **pb, |
696 | struct sk_buff *skb) | |
c25aaf81 KS |
697 | { |
698 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
699 | char *dest = start + (section_index * net_device->send_section_size) |
700 | + pend_size; | |
c25aaf81 KS |
701 | int i; |
702 | u32 msg_size = 0; | |
7c3877f2 HZ |
703 | u32 padding = 0; |
704 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
705 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
706 | packet->page_buf_cnt; | |
7c3877f2 HZ |
707 | |
708 | /* Add padding */ | |
ebc1dcf6 | 709 | if (skb->xmit_more && remain && !packet->cp_partial) { |
7c3877f2 | 710 | padding = net_device->pkt_align - remain; |
24476760 | 711 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
712 | packet->total_data_buflen += padding; |
713 | } | |
c25aaf81 | 714 | |
aa0a34be | 715 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
716 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
717 | u32 offset = (*pb)[i].offset; | |
718 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
719 | |
720 | memcpy(dest, (src + offset), len); | |
721 | msg_size += len; | |
722 | dest += len; | |
723 | } | |
7c3877f2 HZ |
724 | |
725 | if (padding) { | |
726 | memset(dest, 0, padding); | |
727 | msg_size += padding; | |
728 | } | |
729 | ||
c25aaf81 KS |
730 | return msg_size; |
731 | } | |
732 | ||
3a8963ac | 733 | static inline int netvsc_send_pkt( |
0a1275ca | 734 | struct hv_device *device, |
7c3877f2 | 735 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 736 | struct netvsc_device *net_device, |
3a3d9a0a KS |
737 | struct hv_page_buffer **pb, |
738 | struct sk_buff *skb) | |
fceaf24a | 739 | { |
7c3877f2 | 740 | struct nvsp_message nvmsg; |
b8b835a8 | 741 | struct netvsc_channel *nvchan |
742 | = &net_device->chan_table[packet->q_idx]; | |
743 | struct vmbus_channel *out_channel = nvchan->channel; | |
0a1275ca | 744 | struct net_device *ndev = hv_get_drvdata(device); |
b8b835a8 | 745 | struct netdev_queue *txq = netdev_get_tx_queue(ndev, packet->q_idx); |
7c3877f2 HZ |
746 | u64 req_id; |
747 | int ret; | |
aa0a34be | 748 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 749 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
c25aaf81 | 750 | |
7c3877f2 | 751 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 752 | if (skb != NULL) { |
21a80820 | 753 | /* 0 is RMC_DATA; */ |
7c3877f2 | 754 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
755 | } else { |
756 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 757 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 758 | } |
fceaf24a | 759 | |
7c3877f2 HZ |
760 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
761 | packet->send_buf_index; | |
762 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
763 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
764 | else | |
765 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
766 | packet->total_data_buflen; | |
21a80820 | 767 | |
3a3d9a0a | 768 | req_id = (ulong)skb; |
f1ea3cd7 | 769 | |
c3582a2c HZ |
770 | if (out_channel->rescind) |
771 | return -ENODEV; | |
772 | ||
72a2f5bd | 773 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
774 | pgbuf = packet->cp_partial ? (*pb) + |
775 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
776 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
777 | pgbuf, | |
778 | packet->page_buf_cnt, | |
779 | &nvmsg, | |
780 | sizeof(struct nvsp_message), | |
781 | req_id, | |
3454323c | 782 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 783 | } else { |
82fa3c77 KS |
784 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
785 | sizeof(struct nvsp_message), | |
786 | req_id, | |
787 | VM_PKT_DATA_INBAND, | |
3454323c | 788 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
fceaf24a HJ |
789 | } |
790 | ||
1d06825b | 791 | if (ret == 0) { |
b8b835a8 | 792 | atomic_inc_return(&nvchan->queue_sends); |
5b54dac8 | 793 | |
46b4f7f5 | 794 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) |
b8b835a8 | 795 | netif_tx_stop_queue(txq); |
1d06825b | 796 | } else if (ret == -EAGAIN) { |
b8b835a8 | 797 | netif_tx_stop_queue(txq); |
798 | if (atomic_read(&nvchan->queue_sends) < 1) { | |
799 | netif_tx_wake_queue(txq); | |
33be96e4 HZ |
800 | ret = -ENOSPC; |
801 | } | |
1d06825b | 802 | } else { |
d9871158 | 803 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 804 | packet, ret); |
1d06825b | 805 | } |
fceaf24a | 806 | |
7c3877f2 HZ |
807 | return ret; |
808 | } | |
809 | ||
c85e4924 HZ |
810 | /* Move packet out of multi send data (msd), and clear msd */ |
811 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
812 | struct sk_buff **msd_skb, | |
813 | struct multi_send_data *msdp) | |
814 | { | |
815 | *msd_skb = msdp->skb; | |
816 | *msd_send = msdp->pkt; | |
817 | msdp->skb = NULL; | |
818 | msdp->pkt = NULL; | |
819 | msdp->count = 0; | |
820 | } | |
821 | ||
7c3877f2 | 822 | int netvsc_send(struct hv_device *device, |
24476760 | 823 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 824 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
825 | struct hv_page_buffer **pb, |
826 | struct sk_buff *skb) | |
7c3877f2 | 827 | { |
592b4fe8 | 828 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
6c4c137e | 829 | int ret = 0; |
b8b835a8 | 830 | struct netvsc_channel *nvchan; |
7c3877f2 HZ |
831 | u32 pktlen = packet->total_data_buflen, msd_len = 0; |
832 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
833 | struct multi_send_data *msdp; |
834 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 835 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 836 | bool try_batch; |
bde79be5 | 837 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 | 838 | |
592b4fe8 | 839 | /* If device is rescinded, return error and packet will get dropped. */ |
840 | if (unlikely(net_device->destroy)) | |
7c3877f2 HZ |
841 | return -ENODEV; |
842 | ||
e8f0a89c VK |
843 | /* We may race with netvsc_connect_vsp()/netvsc_init_buf() and get |
844 | * here before the negotiation with the host is finished and | |
845 | * send_section_map may not be allocated yet. | |
846 | */ | |
2d694d2a | 847 | if (unlikely(!net_device->send_section_map)) |
e8f0a89c VK |
848 | return -EAGAIN; |
849 | ||
b8b835a8 | 850 | nvchan = &net_device->chan_table[packet->q_idx]; |
7c3877f2 | 851 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 852 | packet->cp_partial = false; |
7c3877f2 | 853 | |
cf8190e4 HZ |
854 | /* Send control message directly without accessing msd (Multi-Send |
855 | * Data) field which may be changed during data packet processing. | |
856 | */ | |
857 | if (!skb) { | |
858 | cur_send = packet; | |
859 | goto send_now; | |
860 | } | |
861 | ||
7c3877f2 | 862 | /* batch packets in send buffer if possible */ |
b8b835a8 | 863 | msdp = &nvchan->msd; |
7c3877f2 HZ |
864 | if (msdp->pkt) |
865 | msd_len = msdp->pkt->total_data_buflen; | |
866 | ||
ebc1dcf6 | 867 | try_batch = msd_len > 0 && msdp->count < net_device->max_pkt; |
aa0a34be | 868 | if (try_batch && msd_len + pktlen + net_device->pkt_align < |
7c3877f2 HZ |
869 | net_device->send_section_size) { |
870 | section_index = msdp->pkt->send_buf_index; | |
871 | ||
aa0a34be HZ |
872 | } else if (try_batch && msd_len + packet->rmsg_size < |
873 | net_device->send_section_size) { | |
874 | section_index = msdp->pkt->send_buf_index; | |
875 | packet->cp_partial = true; | |
876 | ||
ebc1dcf6 | 877 | } else if (pktlen + net_device->pkt_align < |
7c3877f2 HZ |
878 | net_device->send_section_size) { |
879 | section_index = netvsc_get_next_send_section(net_device); | |
880 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
881 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
882 | msd_len = 0; | |
7c3877f2 HZ |
883 | } |
884 | } | |
885 | ||
886 | if (section_index != NETVSC_INVALID_INDEX) { | |
887 | netvsc_copy_to_send_buf(net_device, | |
888 | section_index, msd_len, | |
694a9fb0 | 889 | packet, rndis_msg, pb, skb); |
b08cc791 | 890 | |
7c3877f2 | 891 | packet->send_buf_index = section_index; |
aa0a34be HZ |
892 | |
893 | if (packet->cp_partial) { | |
894 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
895 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
896 | } else { | |
897 | packet->page_buf_cnt = 0; | |
898 | packet->total_data_buflen += msd_len; | |
aa0a34be | 899 | } |
7c3877f2 | 900 | |
793e3955 | 901 | if (msdp->pkt) { |
902 | packet->total_packets += msdp->pkt->total_packets; | |
903 | packet->total_bytes += msdp->pkt->total_bytes; | |
904 | } | |
905 | ||
c85e4924 | 906 | if (msdp->skb) |
17db4bce | 907 | dev_consume_skb_any(msdp->skb); |
ee90b812 | 908 | |
bde79be5 | 909 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 910 | msdp->skb = skb; |
7c3877f2 HZ |
911 | msdp->pkt = packet; |
912 | msdp->count++; | |
913 | } else { | |
914 | cur_send = packet; | |
c85e4924 | 915 | msdp->skb = NULL; |
7c3877f2 HZ |
916 | msdp->pkt = NULL; |
917 | msdp->count = 0; | |
918 | } | |
919 | } else { | |
c85e4924 | 920 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
921 | cur_send = packet; |
922 | } | |
923 | ||
7c3877f2 | 924 | if (msd_send) { |
6c4c137e SH |
925 | int m_ret = netvsc_send_pkt(device, msd_send, net_device, |
926 | NULL, msd_skb); | |
7c3877f2 HZ |
927 | |
928 | if (m_ret != 0) { | |
929 | netvsc_free_send_slot(net_device, | |
930 | msd_send->send_buf_index); | |
c85e4924 | 931 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
932 | } |
933 | } | |
934 | ||
cf8190e4 | 935 | send_now: |
7c3877f2 | 936 | if (cur_send) |
0a1275ca | 937 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 938 | |
7aab5159 JS |
939 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
940 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 941 | |
fceaf24a HJ |
942 | return ret; |
943 | } | |
944 | ||
c0b558e5 HZ |
945 | static int netvsc_send_recv_completion(struct vmbus_channel *channel, |
946 | u64 transaction_id, u32 status) | |
5fa9d3c5 HZ |
947 | { |
948 | struct nvsp_message recvcompMessage; | |
5fa9d3c5 HZ |
949 | int ret; |
950 | ||
951 | recvcompMessage.hdr.msg_type = | |
952 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
953 | ||
63f6921d | 954 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 | 955 | |
5fa9d3c5 | 956 | /* Send the completion */ |
5b54dac8 | 957 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
c0b558e5 HZ |
958 | sizeof(struct nvsp_message_header) + sizeof(u32), |
959 | transaction_id, VM_PKT_COMP, 0); | |
960 | ||
961 | return ret; | |
962 | } | |
963 | ||
964 | static inline void count_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx, | |
965 | u32 *filled, u32 *avail) | |
966 | { | |
b8b835a8 | 967 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
968 | u32 first = mrc->first; | |
969 | u32 next = mrc->next; | |
c0b558e5 HZ |
970 | |
971 | *filled = (first > next) ? NETVSC_RECVSLOT_MAX - first + next : | |
972 | next - first; | |
973 | ||
974 | *avail = NETVSC_RECVSLOT_MAX - *filled - 1; | |
975 | } | |
976 | ||
977 | /* Read the first filled slot, no change to index */ | |
978 | static inline struct recv_comp_data *read_recv_comp_slot(struct netvsc_device | |
979 | *nvdev, u16 q_idx) | |
980 | { | |
b8b835a8 | 981 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
982 | u32 filled, avail; |
983 | ||
b8b835a8 | 984 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
985 | return NULL; |
986 | ||
987 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
988 | if (!filled) | |
989 | return NULL; | |
990 | ||
b8b835a8 | 991 | return mrc->buf + mrc->first * sizeof(struct recv_comp_data); |
c0b558e5 HZ |
992 | } |
993 | ||
994 | /* Put the first filled slot back to available pool */ | |
995 | static inline void put_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx) | |
996 | { | |
b8b835a8 | 997 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
998 | int num_recv; |
999 | ||
b8b835a8 | 1000 | mrc->first = (mrc->first + 1) % NETVSC_RECVSLOT_MAX; |
c0b558e5 HZ |
1001 | |
1002 | num_recv = atomic_dec_return(&nvdev->num_outstanding_recvs); | |
1003 | ||
1004 | if (nvdev->destroy && num_recv == 0) | |
1005 | wake_up(&nvdev->wait_drain); | |
1006 | } | |
1007 | ||
1008 | /* Check and send pending recv completions */ | |
1009 | static void netvsc_chk_recv_comp(struct netvsc_device *nvdev, | |
1010 | struct vmbus_channel *channel, u16 q_idx) | |
1011 | { | |
1012 | struct recv_comp_data *rcd; | |
1013 | int ret; | |
1014 | ||
1015 | while (true) { | |
1016 | rcd = read_recv_comp_slot(nvdev, q_idx); | |
1017 | if (!rcd) | |
1018 | break; | |
1019 | ||
1020 | ret = netvsc_send_recv_completion(channel, rcd->tid, | |
1021 | rcd->status); | |
1022 | if (ret) | |
1023 | break; | |
1024 | ||
1025 | put_recv_comp_slot(nvdev, q_idx); | |
5fa9d3c5 HZ |
1026 | } |
1027 | } | |
1028 | ||
c0b558e5 HZ |
1029 | #define NETVSC_RCD_WATERMARK 80 |
1030 | ||
1031 | /* Get next available slot */ | |
1032 | static inline struct recv_comp_data *get_recv_comp_slot( | |
1033 | struct netvsc_device *nvdev, struct vmbus_channel *channel, u16 q_idx) | |
1034 | { | |
b8b835a8 | 1035 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1036 | u32 filled, avail, next; |
1037 | struct recv_comp_data *rcd; | |
1038 | ||
b8b835a8 | 1039 | if (unlikely(!nvdev->recv_section)) |
c0b558e5 HZ |
1040 | return NULL; |
1041 | ||
b8b835a8 | 1042 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
1043 | return NULL; |
1044 | ||
1045 | if (atomic_read(&nvdev->num_outstanding_recvs) > | |
1046 | nvdev->recv_section->num_sub_allocs * NETVSC_RCD_WATERMARK / 100) | |
1047 | netvsc_chk_recv_comp(nvdev, channel, q_idx); | |
1048 | ||
1049 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1050 | if (!avail) | |
1051 | return NULL; | |
1052 | ||
b8b835a8 | 1053 | next = mrc->next; |
1054 | rcd = mrc->buf + next * sizeof(struct recv_comp_data); | |
1055 | mrc->next = (next + 1) % NETVSC_RECVSLOT_MAX; | |
c0b558e5 HZ |
1056 | |
1057 | atomic_inc(&nvdev->num_outstanding_recvs); | |
1058 | ||
1059 | return rcd; | |
1060 | } | |
1061 | ||
15a863bf | 1062 | static int netvsc_receive(struct net_device *ndev, |
dc54a08c | 1063 | struct netvsc_device *net_device, |
1064 | struct net_device_context *net_device_ctx, | |
1065 | struct hv_device *device, | |
1066 | struct vmbus_channel *channel, | |
f3dd3f47 | 1067 | const struct vmpacket_descriptor *desc, |
dc54a08c | 1068 | struct nvsp_message *nvsp) |
fceaf24a | 1069 | { |
f3dd3f47 | 1070 | const struct vmtransfer_page_packet_header *vmxferpage_packet |
1071 | = container_of(desc, const struct vmtransfer_page_packet_header, d); | |
15a863bf | 1072 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
dc54a08c | 1073 | char *recv_buf = net_device->recv_buf; |
4baab261 | 1074 | u32 status = NVSP_STAT_SUCCESS; |
45326342 HZ |
1075 | int i; |
1076 | int count = 0; | |
c0b558e5 | 1077 | int ret; |
779b4d17 | 1078 | |
454f18a9 | 1079 | /* Make sure this is a valid nvsp packet */ |
dc54a08c | 1080 | if (unlikely(nvsp->hdr.msg_type != NVSP_MSG1_TYPE_SEND_RNDIS_PKT)) { |
1081 | netif_err(net_device_ctx, rx_err, ndev, | |
1082 | "Unknown nvsp packet type received %u\n", | |
1083 | nvsp->hdr.msg_type); | |
15a863bf | 1084 | return 0; |
fceaf24a HJ |
1085 | } |
1086 | ||
dc54a08c | 1087 | if (unlikely(vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID)) { |
1088 | netif_err(net_device_ctx, rx_err, ndev, | |
1089 | "Invalid xfer page set id - expecting %x got %x\n", | |
1090 | NETVSC_RECEIVE_BUFFER_ID, | |
1091 | vmxferpage_packet->xfer_pageset_id); | |
15a863bf | 1092 | return 0; |
fceaf24a HJ |
1093 | } |
1094 | ||
4baab261 | 1095 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1096 | |
454f18a9 | 1097 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1098 | for (i = 0; i < count; i++) { |
dc54a08c | 1099 | void *data = recv_buf |
1100 | + vmxferpage_packet->ranges[i].byte_offset; | |
1101 | u32 buflen = vmxferpage_packet->ranges[i].byte_count; | |
fceaf24a | 1102 | |
454f18a9 | 1103 | /* Pass it to the upper layer */ |
dc54a08c | 1104 | status = rndis_filter_receive(ndev, net_device, device, |
1105 | channel, data, buflen); | |
fceaf24a HJ |
1106 | } |
1107 | ||
15a863bf | 1108 | if (net_device->chan_table[q_idx].mrc.buf) { |
1109 | struct recv_comp_data *rcd; | |
1110 | ||
1111 | rcd = get_recv_comp_slot(net_device, channel, q_idx); | |
1112 | if (rcd) { | |
1113 | rcd->tid = vmxferpage_packet->d.trans_id; | |
1114 | rcd->status = status; | |
1115 | } else { | |
1116 | netdev_err(ndev, "Recv_comp full buf q:%hd, tid:%llx\n", | |
1117 | q_idx, vmxferpage_packet->d.trans_id); | |
1118 | } | |
1119 | } else { | |
c0b558e5 HZ |
1120 | ret = netvsc_send_recv_completion(channel, |
1121 | vmxferpage_packet->d.trans_id, | |
1122 | status); | |
1123 | if (ret) | |
1124 | netdev_err(ndev, "Recv_comp q:%hd, tid:%llx, err:%d\n", | |
1125 | q_idx, vmxferpage_packet->d.trans_id, ret); | |
c0b558e5 | 1126 | } |
15a863bf | 1127 | return count; |
fceaf24a HJ |
1128 | } |
1129 | ||
5b54dac8 | 1130 | static void netvsc_send_table(struct hv_device *hdev, |
71790a27 | 1131 | struct nvsp_message *nvmsg) |
5b54dac8 | 1132 | { |
0a1275ca | 1133 | struct net_device *ndev = hv_get_drvdata(hdev); |
7ce10124 | 1134 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
5b54dac8 HZ |
1135 | int i; |
1136 | u32 count, *tab; | |
1137 | ||
5b54dac8 HZ |
1138 | count = nvmsg->msg.v5_msg.send_table.count; |
1139 | if (count != VRSS_SEND_TAB_SIZE) { | |
1140 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1141 | return; | |
1142 | } | |
1143 | ||
1144 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1145 | nvmsg->msg.v5_msg.send_table.offset); | |
1146 | ||
1147 | for (i = 0; i < count; i++) | |
7ce10124 | 1148 | net_device_ctx->tx_send_table[i] = tab[i]; |
5b54dac8 HZ |
1149 | } |
1150 | ||
f9a7da91 | 1151 | static void netvsc_send_vf(struct net_device_context *net_device_ctx, |
71790a27 HZ |
1152 | struct nvsp_message *nvmsg) |
1153 | { | |
f9a7da91 VK |
1154 | net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
1155 | net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
71790a27 HZ |
1156 | } |
1157 | ||
1158 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
f9a7da91 VK |
1159 | struct net_device_context *net_device_ctx, |
1160 | struct nvsp_message *nvmsg) | |
71790a27 HZ |
1161 | { |
1162 | switch (nvmsg->hdr.msg_type) { | |
1163 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1164 | netvsc_send_table(hdev, nvmsg); | |
1165 | break; | |
1166 | ||
1167 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
f9a7da91 | 1168 | netvsc_send_vf(net_device_ctx, nvmsg); |
71790a27 HZ |
1169 | break; |
1170 | } | |
1171 | } | |
1172 | ||
15a863bf | 1173 | static int netvsc_process_raw_pkt(struct hv_device *device, |
1174 | struct vmbus_channel *channel, | |
1175 | struct netvsc_device *net_device, | |
1176 | struct net_device *ndev, | |
f9645430 | 1177 | const struct vmpacket_descriptor *desc, |
1178 | int budget) | |
99a50bb1 | 1179 | { |
f9a7da91 | 1180 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
f3dd3f47 | 1181 | struct nvsp_message *nvmsg = hv_pkt_data(desc); |
99a50bb1 S |
1182 | |
1183 | switch (desc->type) { | |
1184 | case VM_PKT_COMP: | |
f9645430 | 1185 | netvsc_send_completion(net_device, channel, device, |
1186 | desc, budget); | |
99a50bb1 S |
1187 | break; |
1188 | ||
1189 | case VM_PKT_DATA_USING_XFER_PAGES: | |
15a863bf | 1190 | return netvsc_receive(ndev, net_device, net_device_ctx, |
1191 | device, channel, desc, nvmsg); | |
99a50bb1 S |
1192 | break; |
1193 | ||
1194 | case VM_PKT_DATA_INBAND: | |
f9a7da91 | 1195 | netvsc_receive_inband(device, net_device_ctx, nvmsg); |
99a50bb1 S |
1196 | break; |
1197 | ||
1198 | default: | |
1199 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", | |
f4f1c23d | 1200 | desc->type, desc->trans_id); |
99a50bb1 S |
1201 | break; |
1202 | } | |
15a863bf | 1203 | |
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | static struct hv_device *netvsc_channel_to_device(struct vmbus_channel *channel) | |
1208 | { | |
1209 | struct vmbus_channel *primary = channel->primary_channel; | |
1210 | ||
1211 | return primary ? primary->device_obj : channel->device_obj; | |
1212 | } | |
1213 | ||
262b7f14 | 1214 | /* Network processing softirq |
1215 | * Process data in incoming ring buffer from host | |
1216 | * Stops when ring is empty or budget is met or exceeded. | |
1217 | */ | |
15a863bf | 1218 | int netvsc_poll(struct napi_struct *napi, int budget) |
1219 | { | |
1220 | struct netvsc_channel *nvchan | |
1221 | = container_of(napi, struct netvsc_channel, napi); | |
1222 | struct vmbus_channel *channel = nvchan->channel; | |
1223 | struct hv_device *device = netvsc_channel_to_device(channel); | |
1224 | u16 q_idx = channel->offermsg.offer.sub_channel_index; | |
1225 | struct net_device *ndev = hv_get_drvdata(device); | |
1226 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); | |
15a863bf | 1227 | int work_done = 0; |
1228 | ||
f4f1c23d | 1229 | /* If starting a new interval */ |
1230 | if (!nvchan->desc) | |
1231 | nvchan->desc = hv_pkt_iter_first(channel); | |
15a863bf | 1232 | |
f4f1c23d | 1233 | while (nvchan->desc && work_done < budget) { |
1234 | work_done += netvsc_process_raw_pkt(device, channel, net_device, | |
f9645430 | 1235 | ndev, nvchan->desc, budget); |
f4f1c23d | 1236 | nvchan->desc = hv_pkt_iter_next(channel, nvchan->desc); |
15a863bf | 1237 | } |
15a863bf | 1238 | |
f4f1c23d | 1239 | /* If receive ring was exhausted |
1240 | * and not doing busy poll | |
262b7f14 | 1241 | * then re-enable host interrupts |
1242 | * and reschedule if ring is not empty. | |
1243 | */ | |
15a863bf | 1244 | if (work_done < budget && |
1245 | napi_complete_done(napi, work_done) && | |
1246 | hv_end_read(&channel->inbound) != 0) | |
1247 | napi_reschedule(napi); | |
1248 | ||
1249 | netvsc_chk_recv_comp(net_device, channel, q_idx); | |
f4f1c23d | 1250 | |
1251 | /* Driver may overshoot since multiple packets per descriptor */ | |
1252 | return min(work_done, budget); | |
99a50bb1 S |
1253 | } |
1254 | ||
262b7f14 | 1255 | /* Call back when data is available in host ring buffer. |
1256 | * Processing is deferred until network softirq (NAPI) | |
1257 | */ | |
5b54dac8 | 1258 | void netvsc_channel_cb(void *context) |
fceaf24a | 1259 | { |
6de38af6 | 1260 | struct netvsc_channel *nvchan = context; |
0b307ebd | 1261 | |
f4f1c23d | 1262 | if (napi_schedule_prep(&nvchan->napi)) { |
1263 | /* disable interupts from host */ | |
1264 | hv_begin_read(&nvchan->channel->inbound); | |
0d6dd357 | 1265 | |
f4f1c23d | 1266 | __napi_schedule(&nvchan->napi); |
1267 | } | |
fceaf24a | 1268 | } |
af24ce42 | 1269 | |
b637e023 HZ |
1270 | /* |
1271 | * netvsc_device_add - Callback when the device belonging to this | |
1272 | * driver is added | |
1273 | */ | |
2c7f83ca | 1274 | int netvsc_device_add(struct hv_device *device, |
1275 | const struct netvsc_device_info *device_info) | |
b637e023 | 1276 | { |
88098834 | 1277 | int i, ret = 0; |
2c7f83ca | 1278 | int ring_size = device_info->ring_size; |
b637e023 | 1279 | struct netvsc_device *net_device; |
88098834 VK |
1280 | struct net_device *ndev = hv_get_drvdata(device); |
1281 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1282 | |
88098834 | 1283 | net_device = alloc_net_device(); |
b1c84927 DC |
1284 | if (!net_device) |
1285 | return -ENOMEM; | |
b637e023 | 1286 | |
5b54dac8 HZ |
1287 | net_device->ring_size = ring_size; |
1288 | ||
15a863bf | 1289 | /* Because the device uses NAPI, all the interrupt batching and |
1290 | * control is done via Net softirq, not the channel handling | |
1291 | */ | |
1292 | set_channel_read_mode(device->channel, HV_CALL_ISR); | |
1293 | ||
bffb1842 S |
1294 | /* If we're reopening the device we may have multiple queues, fill the |
1295 | * chn_table with the default channel to use it before subchannels are | |
1296 | * opened. | |
1297 | * Initialize the channel state before we open; | |
1298 | * we can be interrupted as soon as we open the channel. | |
1299 | */ | |
1300 | ||
1301 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) { | |
1302 | struct netvsc_channel *nvchan = &net_device->chan_table[i]; | |
1303 | ||
1304 | nvchan->channel = device->channel; | |
bffb1842 S |
1305 | } |
1306 | ||
2be0f264 | 1307 | /* Enable NAPI handler before init callbacks */ |
1308 | netif_napi_add(ndev, &net_device->chan_table[0].napi, | |
1309 | netvsc_poll, NAPI_POLL_WEIGHT); | |
1310 | ||
b637e023 | 1311 | /* Open the channel */ |
aae23986 S |
1312 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1313 | ring_size * PAGE_SIZE, NULL, 0, | |
6de38af6 | 1314 | netvsc_channel_cb, |
1315 | net_device->chan_table); | |
b637e023 HZ |
1316 | |
1317 | if (ret != 0) { | |
2be0f264 | 1318 | netif_napi_del(&net_device->chan_table[0].napi); |
d9871158 | 1319 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1320 | goto cleanup; |
1321 | } | |
1322 | ||
1323 | /* Channel is opened */ | |
93ba2222 | 1324 | netdev_dbg(ndev, "hv_netvsc channel opened successfully\n"); |
b637e023 | 1325 | |
15a863bf | 1326 | napi_enable(&net_device->chan_table[0].napi); |
88098834 VK |
1327 | |
1328 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is | |
1329 | * populated. | |
1330 | */ | |
545a8e79 | 1331 | rcu_assign_pointer(net_device_ctx->nvdev, net_device); |
5b54dac8 | 1332 | |
b637e023 | 1333 | /* Connect with the NetVsp */ |
95790837 | 1334 | ret = netvsc_connect_vsp(device, net_device); |
b637e023 | 1335 | if (ret != 0) { |
d9871158 | 1336 | netdev_err(ndev, |
c909ebbd | 1337 | "unable to connect to NetVSP - %d\n", ret); |
b637e023 HZ |
1338 | goto close; |
1339 | } | |
1340 | ||
1341 | return ret; | |
1342 | ||
1343 | close: | |
76bb5db5 | 1344 | netif_napi_del(&net_device->chan_table[0].napi); |
15a863bf | 1345 | |
b637e023 HZ |
1346 | /* Now, we can close the channel safely */ |
1347 | vmbus_close(device->channel); | |
1348 | ||
1349 | cleanup: | |
545a8e79 | 1350 | free_netvsc_device(&net_device->rcu); |
b637e023 HZ |
1351 | |
1352 | return ret; | |
95790837 | 1353 | |
b637e023 | 1354 | } |