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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 | ||
88098834 | 62 | static struct netvsc_device *alloc_net_device(void) |
fceaf24a | 63 | { |
85799a37 | 64 | struct netvsc_device *net_device; |
fceaf24a | 65 | |
85799a37 HZ |
66 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
67 | if (!net_device) | |
fceaf24a HJ |
68 | return NULL; |
69 | ||
b8b835a8 | 70 | net_device->chan_table[0].mrc.buf |
71 | = vzalloc(NETVSC_RECVSLOT_MAX * sizeof(struct recv_comp_data)); | |
c0b558e5 | 72 | |
dc5cd894 | 73 | init_waitqueue_head(&net_device->wait_drain); |
c38b9c71 | 74 | net_device->destroy = false; |
84bf9cef | 75 | atomic_set(&net_device->open_cnt, 0); |
7c3877f2 HZ |
76 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
77 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; | |
fd612602 | 78 | init_completion(&net_device->channel_init_wait); |
7c3877f2 | 79 | |
85799a37 | 80 | return net_device; |
fceaf24a HJ |
81 | } |
82 | ||
f90251c8 HZ |
83 | static void free_netvsc_device(struct netvsc_device *nvdev) |
84 | { | |
c0b558e5 HZ |
85 | int i; |
86 | ||
87 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) | |
b8b835a8 | 88 | vfree(nvdev->chan_table[i].mrc.buf); |
c0b558e5 | 89 | |
f90251c8 HZ |
90 | kfree(nvdev); |
91 | } | |
92 | ||
fceaf24a | 93 | |
46b4f7f5 | 94 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 95 | { |
2625466d | 96 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
9d88f33a | 97 | |
46b4f7f5 | 98 | if (net_device && net_device->destroy) |
85799a37 | 99 | net_device = NULL; |
fceaf24a | 100 | |
85799a37 | 101 | return net_device; |
fceaf24a HJ |
102 | } |
103 | ||
7a2a0a84 | 104 | static void netvsc_destroy_buf(struct hv_device *device) |
ec91cd09 HZ |
105 | { |
106 | struct nvsp_message *revoke_packet; | |
3d541ac5 | 107 | struct net_device *ndev = hv_get_drvdata(device); |
2625466d | 108 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); |
7a2a0a84 | 109 | int ret; |
ec91cd09 HZ |
110 | |
111 | /* | |
112 | * If we got a section count, it means we received a | |
113 | * SendReceiveBufferComplete msg (ie sent | |
114 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
115 | * to send a revoke msg here | |
116 | */ | |
117 | if (net_device->recv_section_cnt) { | |
118 | /* Send the revoke receive buffer */ | |
119 | revoke_packet = &net_device->revoke_packet; | |
120 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
121 | ||
122 | revoke_packet->hdr.msg_type = | |
123 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
124 | revoke_packet->msg.v1_msg. | |
125 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
126 | ||
3d541ac5 | 127 | ret = vmbus_sendpacket(device->channel, |
ec91cd09 HZ |
128 | revoke_packet, |
129 | sizeof(struct nvsp_message), | |
130 | (unsigned long)revoke_packet, | |
131 | VM_PKT_DATA_INBAND, 0); | |
132 | /* | |
133 | * If we failed here, we might as well return and | |
134 | * have a leak rather than continue and a bugchk | |
135 | */ | |
136 | if (ret != 0) { | |
d9871158 | 137 | netdev_err(ndev, "unable to send " |
c909ebbd | 138 | "revoke receive buffer to netvsp\n"); |
7a2a0a84 | 139 | return; |
ec91cd09 HZ |
140 | } |
141 | } | |
142 | ||
143 | /* Teardown the gpadl on the vsp end */ | |
144 | if (net_device->recv_buf_gpadl_handle) { | |
3d541ac5 VK |
145 | ret = vmbus_teardown_gpadl(device->channel, |
146 | net_device->recv_buf_gpadl_handle); | |
ec91cd09 HZ |
147 | |
148 | /* If we failed here, we might as well return and have a leak | |
149 | * rather than continue and a bugchk | |
150 | */ | |
151 | if (ret != 0) { | |
d9871158 | 152 | netdev_err(ndev, |
c909ebbd | 153 | "unable to teardown receive buffer's gpadl\n"); |
7a2a0a84 | 154 | return; |
ec91cd09 HZ |
155 | } |
156 | net_device->recv_buf_gpadl_handle = 0; | |
157 | } | |
158 | ||
159 | if (net_device->recv_buf) { | |
160 | /* Free up the receive buffer */ | |
b679ef73 | 161 | vfree(net_device->recv_buf); |
ec91cd09 HZ |
162 | net_device->recv_buf = NULL; |
163 | } | |
164 | ||
165 | if (net_device->recv_section) { | |
166 | net_device->recv_section_cnt = 0; | |
167 | kfree(net_device->recv_section); | |
168 | net_device->recv_section = NULL; | |
169 | } | |
170 | ||
c25aaf81 KS |
171 | /* Deal with the send buffer we may have setup. |
172 | * If we got a send section size, it means we received a | |
c51ed182 HZ |
173 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
174 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need | |
c25aaf81 KS |
175 | * to send a revoke msg here |
176 | */ | |
177 | if (net_device->send_section_size) { | |
178 | /* Send the revoke receive buffer */ | |
179 | revoke_packet = &net_device->revoke_packet; | |
180 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
181 | ||
182 | revoke_packet->hdr.msg_type = | |
183 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
c51ed182 HZ |
184 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
185 | NETVSC_SEND_BUFFER_ID; | |
c25aaf81 | 186 | |
3d541ac5 | 187 | ret = vmbus_sendpacket(device->channel, |
c25aaf81 KS |
188 | revoke_packet, |
189 | sizeof(struct nvsp_message), | |
190 | (unsigned long)revoke_packet, | |
191 | VM_PKT_DATA_INBAND, 0); | |
192 | /* If we failed here, we might as well return and | |
193 | * have a leak rather than continue and a bugchk | |
194 | */ | |
195 | if (ret != 0) { | |
196 | netdev_err(ndev, "unable to send " | |
197 | "revoke send buffer to netvsp\n"); | |
7a2a0a84 | 198 | return; |
c25aaf81 KS |
199 | } |
200 | } | |
201 | /* Teardown the gpadl on the vsp end */ | |
202 | if (net_device->send_buf_gpadl_handle) { | |
3d541ac5 | 203 | ret = vmbus_teardown_gpadl(device->channel, |
c25aaf81 KS |
204 | net_device->send_buf_gpadl_handle); |
205 | ||
206 | /* If we failed here, we might as well return and have a leak | |
207 | * rather than continue and a bugchk | |
208 | */ | |
209 | if (ret != 0) { | |
210 | netdev_err(ndev, | |
211 | "unable to teardown send buffer's gpadl\n"); | |
7a2a0a84 | 212 | return; |
c25aaf81 | 213 | } |
2f18423d | 214 | net_device->send_buf_gpadl_handle = 0; |
c25aaf81 KS |
215 | } |
216 | if (net_device->send_buf) { | |
c51ed182 | 217 | /* Free up the send buffer */ |
06b47aac | 218 | vfree(net_device->send_buf); |
c25aaf81 KS |
219 | net_device->send_buf = NULL; |
220 | } | |
221 | kfree(net_device->send_section_map); | |
ec91cd09 HZ |
222 | } |
223 | ||
c25aaf81 | 224 | static int netvsc_init_buf(struct hv_device *device) |
fceaf24a | 225 | { |
21a80820 | 226 | int ret = 0; |
85799a37 HZ |
227 | struct netvsc_device *net_device; |
228 | struct nvsp_message *init_packet; | |
2ddd5e5f | 229 | struct net_device *ndev; |
0a726c2b | 230 | int node; |
fceaf24a | 231 | |
5a71ae30 | 232 | net_device = get_outbound_net_device(device); |
2ddd5e5f | 233 | if (!net_device) |
927bc33c | 234 | return -ENODEV; |
0a1275ca | 235 | ndev = hv_get_drvdata(device); |
fceaf24a | 236 | |
0a726c2b S |
237 | node = cpu_to_node(device->channel->target_cpu); |
238 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); | |
239 | if (!net_device->recv_buf) | |
240 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); | |
241 | ||
53d21fdb | 242 | if (!net_device->recv_buf) { |
d9871158 | 243 | netdev_err(ndev, "unable to allocate receive " |
c909ebbd | 244 | "buffer of size %d\n", net_device->recv_buf_size); |
927bc33c | 245 | ret = -ENOMEM; |
0c3b7b2f | 246 | goto cleanup; |
fceaf24a | 247 | } |
fceaf24a | 248 | |
454f18a9 BP |
249 | /* |
250 | * Establish the gpadl handle for this buffer on this | |
251 | * channel. Note: This call uses the vmbus connection rather | |
252 | * than the channel to establish the gpadl handle. | |
253 | */ | |
53d21fdb HZ |
254 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
255 | net_device->recv_buf_size, | |
256 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 257 | if (ret != 0) { |
d9871158 | 258 | netdev_err(ndev, |
c909ebbd | 259 | "unable to establish receive buffer's gpadl\n"); |
0c3b7b2f | 260 | goto cleanup; |
fceaf24a HJ |
261 | } |
262 | ||
454f18a9 | 263 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 264 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 265 | |
85799a37 | 266 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 267 | |
53d21fdb HZ |
268 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
269 | init_packet->msg.v1_msg.send_recv_buf. | |
270 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
271 | init_packet->msg.v1_msg. | |
272 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 273 | |
454f18a9 | 274 | /* Send the gpadl notification request */ |
85799a37 | 275 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 276 | sizeof(struct nvsp_message), |
85799a37 | 277 | (unsigned long)init_packet, |
415f2287 | 278 | VM_PKT_DATA_INBAND, |
5a4df290 | 279 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 280 | if (ret != 0) { |
d9871158 | 281 | netdev_err(ndev, |
c909ebbd | 282 | "unable to send receive buffer's gpadl to netvsp\n"); |
0c3b7b2f | 283 | goto cleanup; |
fceaf24a HJ |
284 | } |
285 | ||
5362855a | 286 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 287 | |
454f18a9 | 288 | /* Check the response */ |
53d21fdb HZ |
289 | if (init_packet->msg.v1_msg. |
290 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
d9871158 | 291 | netdev_err(ndev, "Unable to complete receive buffer " |
8bff33ab | 292 | "initialization with NetVsp - status %d\n", |
53d21fdb HZ |
293 | init_packet->msg.v1_msg. |
294 | send_recv_buf_complete.status); | |
927bc33c | 295 | ret = -EINVAL; |
0c3b7b2f | 296 | goto cleanup; |
fceaf24a HJ |
297 | } |
298 | ||
454f18a9 | 299 | /* Parse the response */ |
fceaf24a | 300 | |
53d21fdb HZ |
301 | net_device->recv_section_cnt = init_packet->msg. |
302 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 303 | |
c1813200 HZ |
304 | net_device->recv_section = kmemdup( |
305 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, | |
306 | net_device->recv_section_cnt * | |
307 | sizeof(struct nvsp_1_receive_buffer_section), | |
308 | GFP_KERNEL); | |
53d21fdb | 309 | if (net_device->recv_section == NULL) { |
927bc33c | 310 | ret = -EINVAL; |
0c3b7b2f | 311 | goto cleanup; |
fceaf24a HJ |
312 | } |
313 | ||
21a80820 GKH |
314 | /* |
315 | * For 1st release, there should only be 1 section that represents the | |
316 | * entire receive buffer | |
317 | */ | |
53d21fdb HZ |
318 | if (net_device->recv_section_cnt != 1 || |
319 | net_device->recv_section->offset != 0) { | |
927bc33c | 320 | ret = -EINVAL; |
0c3b7b2f | 321 | goto cleanup; |
fceaf24a HJ |
322 | } |
323 | ||
c25aaf81 KS |
324 | /* Now setup the send buffer. |
325 | */ | |
5defde59 S |
326 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
327 | if (!net_device->send_buf) | |
328 | net_device->send_buf = vzalloc(net_device->send_buf_size); | |
c25aaf81 KS |
329 | if (!net_device->send_buf) { |
330 | netdev_err(ndev, "unable to allocate send " | |
331 | "buffer of size %d\n", net_device->send_buf_size); | |
332 | ret = -ENOMEM; | |
333 | goto cleanup; | |
334 | } | |
335 | ||
336 | /* Establish the gpadl handle for this buffer on this | |
337 | * channel. Note: This call uses the vmbus connection rather | |
338 | * than the channel to establish the gpadl handle. | |
339 | */ | |
340 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, | |
341 | net_device->send_buf_size, | |
342 | &net_device->send_buf_gpadl_handle); | |
343 | if (ret != 0) { | |
344 | netdev_err(ndev, | |
345 | "unable to establish send buffer's gpadl\n"); | |
346 | goto cleanup; | |
347 | } | |
348 | ||
349 | /* Notify the NetVsp of the gpadl handle */ | |
350 | init_packet = &net_device->channel_init_pkt; | |
351 | memset(init_packet, 0, sizeof(struct nvsp_message)); | |
352 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; | |
c51ed182 | 353 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
c25aaf81 | 354 | net_device->send_buf_gpadl_handle; |
c51ed182 | 355 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
c25aaf81 KS |
356 | |
357 | /* Send the gpadl notification request */ | |
358 | ret = vmbus_sendpacket(device->channel, init_packet, | |
359 | sizeof(struct nvsp_message), | |
360 | (unsigned long)init_packet, | |
361 | VM_PKT_DATA_INBAND, | |
362 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
363 | if (ret != 0) { | |
364 | netdev_err(ndev, | |
365 | "unable to send send buffer's gpadl to netvsp\n"); | |
366 | goto cleanup; | |
367 | } | |
368 | ||
5362855a | 369 | wait_for_completion(&net_device->channel_init_wait); |
c25aaf81 KS |
370 | |
371 | /* Check the response */ | |
372 | if (init_packet->msg.v1_msg. | |
373 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
374 | netdev_err(ndev, "Unable to complete send buffer " | |
375 | "initialization with NetVsp - status %d\n", | |
376 | init_packet->msg.v1_msg. | |
c51ed182 | 377 | send_send_buf_complete.status); |
c25aaf81 KS |
378 | ret = -EINVAL; |
379 | goto cleanup; | |
380 | } | |
381 | ||
382 | /* Parse the response */ | |
383 | net_device->send_section_size = init_packet->msg. | |
384 | v1_msg.send_send_buf_complete.section_size; | |
385 | ||
386 | /* Section count is simply the size divided by the section size. | |
387 | */ | |
388 | net_device->send_section_cnt = | |
796cc88c | 389 | net_device->send_buf_size / net_device->send_section_size; |
c25aaf81 | 390 | |
93ba2222 VK |
391 | netdev_dbg(ndev, "Send section size: %d, Section count:%d\n", |
392 | net_device->send_section_size, net_device->send_section_cnt); | |
c25aaf81 KS |
393 | |
394 | /* Setup state for managing the send buffer. */ | |
395 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, | |
396 | BITS_PER_LONG); | |
397 | ||
e53a9c2a SH |
398 | net_device->send_section_map = kcalloc(net_device->map_words, |
399 | sizeof(ulong), GFP_KERNEL); | |
dd1d3f8f WY |
400 | if (net_device->send_section_map == NULL) { |
401 | ret = -ENOMEM; | |
c25aaf81 | 402 | goto cleanup; |
dd1d3f8f | 403 | } |
c25aaf81 | 404 | |
0c3b7b2f | 405 | goto exit; |
fceaf24a | 406 | |
0c3b7b2f | 407 | cleanup: |
3d541ac5 | 408 | netvsc_destroy_buf(device); |
fceaf24a | 409 | |
0c3b7b2f | 410 | exit: |
fceaf24a HJ |
411 | return ret; |
412 | } | |
413 | ||
f157e78d HZ |
414 | /* Negotiate NVSP protocol version */ |
415 | static int negotiate_nvsp_ver(struct hv_device *device, | |
416 | struct netvsc_device *net_device, | |
417 | struct nvsp_message *init_packet, | |
418 | u32 nvsp_ver) | |
fceaf24a | 419 | { |
0a1275ca | 420 | struct net_device *ndev = hv_get_drvdata(device); |
7390fe9c | 421 | int ret; |
fceaf24a | 422 | |
85799a37 | 423 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb | 424 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
f157e78d HZ |
425 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
426 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; | |
fceaf24a | 427 | |
454f18a9 | 428 | /* Send the init request */ |
85799a37 | 429 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 430 | sizeof(struct nvsp_message), |
85799a37 | 431 | (unsigned long)init_packet, |
415f2287 | 432 | VM_PKT_DATA_INBAND, |
5a4df290 | 433 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 434 | |
b8a3d52b | 435 | if (ret != 0) |
f157e78d | 436 | return ret; |
fceaf24a | 437 | |
5362855a | 438 | wait_for_completion(&net_device->channel_init_wait); |
fceaf24a | 439 | |
53d21fdb | 440 | if (init_packet->msg.init_msg.init_complete.status != |
f157e78d HZ |
441 | NVSP_STAT_SUCCESS) |
442 | return -EINVAL; | |
fceaf24a | 443 | |
a1eabb01 | 444 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
f157e78d HZ |
445 | return 0; |
446 | ||
71790a27 | 447 | /* NVSPv2 or later: Send NDIS config */ |
f157e78d HZ |
448 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
449 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; | |
0a1275ca | 450 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
1f5f3a75 | 451 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
f157e78d | 452 | |
7f5d5af0 | 453 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) { |
71790a27 HZ |
454 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
455 | ||
7f5d5af0 HZ |
456 | /* Teaming bit is needed to receive link speed updates */ |
457 | init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1; | |
458 | } | |
459 | ||
f157e78d HZ |
460 | ret = vmbus_sendpacket(device->channel, init_packet, |
461 | sizeof(struct nvsp_message), | |
462 | (unsigned long)init_packet, | |
463 | VM_PKT_DATA_INBAND, 0); | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | static int netvsc_connect_vsp(struct hv_device *device) | |
469 | { | |
470 | int ret; | |
471 | struct netvsc_device *net_device; | |
472 | struct nvsp_message *init_packet; | |
473 | int ndis_version; | |
e5a78fad SH |
474 | const u32 ver_list[] = { |
475 | NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, | |
a1eabb01 | 476 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; |
e5a78fad | 477 | int i; |
f157e78d HZ |
478 | |
479 | net_device = get_outbound_net_device(device); | |
480 | if (!net_device) | |
481 | return -ENODEV; | |
f157e78d HZ |
482 | |
483 | init_packet = &net_device->channel_init_pkt; | |
484 | ||
485 | /* Negotiate the latest NVSP protocol supported */ | |
e5a78fad | 486 | for (i = ARRAY_SIZE(ver_list) - 1; i >= 0; i--) |
a1eabb01 HZ |
487 | if (negotiate_nvsp_ver(device, net_device, init_packet, |
488 | ver_list[i]) == 0) { | |
489 | net_device->nvsp_version = ver_list[i]; | |
490 | break; | |
491 | } | |
492 | ||
493 | if (i < 0) { | |
0f48c72c | 494 | ret = -EPROTO; |
0c3b7b2f | 495 | goto cleanup; |
fceaf24a | 496 | } |
f157e78d HZ |
497 | |
498 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); | |
499 | ||
454f18a9 | 500 | /* Send the ndis version */ |
85799a37 | 501 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 502 | |
a1eabb01 | 503 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
1f73db49 | 504 | ndis_version = 0x00060001; |
a1eabb01 HZ |
505 | else |
506 | ndis_version = 0x0006001e; | |
fceaf24a | 507 | |
53d21fdb HZ |
508 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
509 | init_packet->msg.v1_msg. | |
510 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 511 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
512 | init_packet->msg.v1_msg. |
513 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 514 | ndis_version & 0xFFFF; |
fceaf24a | 515 | |
454f18a9 | 516 | /* Send the init request */ |
85799a37 | 517 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
518 | sizeof(struct nvsp_message), |
519 | (unsigned long)init_packet, | |
520 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 521 | if (ret != 0) |
0c3b7b2f | 522 | goto cleanup; |
454f18a9 BP |
523 | |
524 | /* Post the big receive buffer to NetVSP */ | |
99d3016d HZ |
525 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
526 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
527 | else | |
528 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
c25aaf81 | 529 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
99d3016d | 530 | |
c25aaf81 | 531 | ret = netvsc_init_buf(device); |
fceaf24a | 532 | |
0c3b7b2f | 533 | cleanup: |
fceaf24a HJ |
534 | return ret; |
535 | } | |
536 | ||
3d541ac5 | 537 | static void netvsc_disconnect_vsp(struct hv_device *device) |
fceaf24a | 538 | { |
3d541ac5 | 539 | netvsc_destroy_buf(device); |
fceaf24a HJ |
540 | } |
541 | ||
3e189519 | 542 | /* |
5a71ae30 | 543 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 544 | */ |
e08f3ea5 | 545 | void netvsc_device_remove(struct hv_device *device) |
fceaf24a | 546 | { |
3d541ac5 VK |
547 | struct net_device *ndev = hv_get_drvdata(device); |
548 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
549 | struct netvsc_device *net_device = net_device_ctx->nvdev; | |
15a863bf | 550 | int i; |
fceaf24a | 551 | |
3d541ac5 | 552 | netvsc_disconnect_vsp(device); |
9d88f33a | 553 | |
3d541ac5 | 554 | net_device_ctx->nvdev = NULL; |
3852409b | 555 | |
86c921af S |
556 | /* |
557 | * At this point, no one should be accessing net_device | |
558 | * except in here | |
559 | */ | |
93ba2222 | 560 | netdev_dbg(ndev, "net device safe to remove\n"); |
fceaf24a | 561 | |
454f18a9 | 562 | /* Now, we can close the channel safely */ |
85799a37 | 563 | vmbus_close(device->channel); |
fceaf24a | 564 | |
15a863bf | 565 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) |
566 | napi_disable(&net_device->chan_table[0].napi); | |
567 | ||
454f18a9 | 568 | /* Release all resources */ |
f90251c8 | 569 | free_netvsc_device(net_device); |
fceaf24a HJ |
570 | } |
571 | ||
33be96e4 HZ |
572 | #define RING_AVAIL_PERCENT_HIWATER 20 |
573 | #define RING_AVAIL_PERCENT_LOWATER 10 | |
574 | ||
575 | /* | |
576 | * Get the percentage of available bytes to write in the ring. | |
577 | * The return value is in range from 0 to 100. | |
578 | */ | |
579 | static inline u32 hv_ringbuf_avail_percent( | |
580 | struct hv_ring_buffer_info *ring_info) | |
581 | { | |
582 | u32 avail_read, avail_write; | |
583 | ||
584 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); | |
585 | ||
586 | return avail_write * 100 / ring_info->ring_datasize; | |
587 | } | |
588 | ||
c25aaf81 KS |
589 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
590 | u32 index) | |
591 | { | |
592 | sync_change_bit(index, net_device->send_section_map); | |
593 | } | |
594 | ||
bc304dd3 SH |
595 | static void netvsc_send_tx_complete(struct netvsc_device *net_device, |
596 | struct vmbus_channel *incoming_channel, | |
597 | struct hv_device *device, | |
50698d80 | 598 | const struct vmpacket_descriptor *desc) |
bc304dd3 | 599 | { |
50698d80 | 600 | struct sk_buff *skb = (struct sk_buff *)(unsigned long)desc->trans_id; |
bc304dd3 SH |
601 | struct net_device *ndev = hv_get_drvdata(device); |
602 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
603 | struct vmbus_channel *channel = device->channel; | |
bc304dd3 SH |
604 | u16 q_idx = 0; |
605 | int queue_sends; | |
606 | ||
607 | /* Notify the layer above us */ | |
608 | if (likely(skb)) { | |
793e3955 | 609 | const struct hv_netvsc_packet *packet |
bc304dd3 | 610 | = (struct hv_netvsc_packet *)skb->cb; |
793e3955 | 611 | u32 send_index = packet->send_buf_index; |
612 | struct netvsc_stats *tx_stats; | |
bc304dd3 SH |
613 | |
614 | if (send_index != NETVSC_INVALID_INDEX) | |
615 | netvsc_free_send_slot(net_device, send_index); | |
793e3955 | 616 | q_idx = packet->q_idx; |
bc304dd3 SH |
617 | channel = incoming_channel; |
618 | ||
6c80f3fc | 619 | tx_stats = &net_device->chan_table[q_idx].tx_stats; |
793e3955 | 620 | |
621 | u64_stats_update_begin(&tx_stats->syncp); | |
622 | tx_stats->packets += packet->total_packets; | |
623 | tx_stats->bytes += packet->total_bytes; | |
624 | u64_stats_update_end(&tx_stats->syncp); | |
625 | ||
17db4bce | 626 | dev_consume_skb_any(skb); |
bc304dd3 SH |
627 | } |
628 | ||
b8b835a8 | 629 | queue_sends = |
630 | atomic_dec_return(&net_device->chan_table[q_idx].queue_sends); | |
bc304dd3 | 631 | |
46b4f7f5 | 632 | if (net_device->destroy && queue_sends == 0) |
bc304dd3 SH |
633 | wake_up(&net_device->wait_drain); |
634 | ||
635 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && | |
636 | !net_device_ctx->start_remove && | |
637 | (hv_ringbuf_avail_percent(&channel->outbound) > RING_AVAIL_PERCENT_HIWATER || | |
638 | queue_sends < 1)) | |
639 | netif_tx_wake_queue(netdev_get_tx_queue(ndev, q_idx)); | |
640 | } | |
641 | ||
97c1723a | 642 | static void netvsc_send_completion(struct netvsc_device *net_device, |
25b85ee8 | 643 | struct vmbus_channel *incoming_channel, |
97c1723a | 644 | struct hv_device *device, |
f3dd3f47 | 645 | const struct vmpacket_descriptor *desc) |
fceaf24a | 646 | { |
f3dd3f47 | 647 | struct nvsp_message *nvsp_packet = hv_pkt_data(desc); |
3d541ac5 | 648 | struct net_device *ndev = hv_get_drvdata(device); |
fceaf24a | 649 | |
bc304dd3 SH |
650 | switch (nvsp_packet->hdr.msg_type) { |
651 | case NVSP_MSG_TYPE_INIT_COMPLETE: | |
652 | case NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE: | |
653 | case NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE: | |
654 | case NVSP_MSG5_TYPE_SUBCHANNEL: | |
454f18a9 | 655 | /* Copy the response back */ |
53d21fdb | 656 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 657 | sizeof(struct nvsp_message)); |
35abb21a | 658 | complete(&net_device->channel_init_wait); |
bc304dd3 SH |
659 | break; |
660 | ||
661 | case NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE: | |
662 | netvsc_send_tx_complete(net_device, incoming_channel, | |
f3dd3f47 | 663 | device, desc); |
bc304dd3 | 664 | break; |
fceaf24a | 665 | |
bc304dd3 SH |
666 | default: |
667 | netdev_err(ndev, | |
668 | "Unknown send completion type %d received!!\n", | |
669 | nvsp_packet->hdr.msg_type); | |
fceaf24a | 670 | } |
fceaf24a HJ |
671 | } |
672 | ||
c25aaf81 KS |
673 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
674 | { | |
b58a1858 | 675 | unsigned long *map_addr = net_device->send_section_map; |
676 | unsigned int i; | |
677 | ||
678 | for_each_clear_bit(i, map_addr, net_device->map_words) { | |
679 | if (sync_test_and_set_bit(i, map_addr) == 0) | |
680 | return i; | |
c25aaf81 | 681 | } |
b58a1858 | 682 | |
683 | return NETVSC_INVALID_INDEX; | |
c25aaf81 KS |
684 | } |
685 | ||
da19fcd0 LP |
686 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
687 | unsigned int section_index, | |
7c3877f2 | 688 | u32 pend_size, |
24476760 | 689 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 690 | struct rndis_message *rndis_msg, |
694a9fb0 KS |
691 | struct hv_page_buffer **pb, |
692 | struct sk_buff *skb) | |
c25aaf81 KS |
693 | { |
694 | char *start = net_device->send_buf; | |
7c3877f2 HZ |
695 | char *dest = start + (section_index * net_device->send_section_size) |
696 | + pend_size; | |
c25aaf81 KS |
697 | int i; |
698 | u32 msg_size = 0; | |
7c3877f2 HZ |
699 | u32 padding = 0; |
700 | u32 remain = packet->total_data_buflen % net_device->pkt_align; | |
aa0a34be HZ |
701 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
702 | packet->page_buf_cnt; | |
7c3877f2 HZ |
703 | |
704 | /* Add padding */ | |
3454323c | 705 | if (skb && skb->xmit_more && remain && |
aa0a34be | 706 | !packet->cp_partial) { |
7c3877f2 | 707 | padding = net_device->pkt_align - remain; |
24476760 | 708 | rndis_msg->msg_len += padding; |
7c3877f2 HZ |
709 | packet->total_data_buflen += padding; |
710 | } | |
c25aaf81 | 711 | |
aa0a34be | 712 | for (i = 0; i < page_count; i++) { |
a9f2e2d6 KS |
713 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
714 | u32 offset = (*pb)[i].offset; | |
715 | u32 len = (*pb)[i].len; | |
c25aaf81 KS |
716 | |
717 | memcpy(dest, (src + offset), len); | |
718 | msg_size += len; | |
719 | dest += len; | |
720 | } | |
7c3877f2 HZ |
721 | |
722 | if (padding) { | |
723 | memset(dest, 0, padding); | |
724 | msg_size += padding; | |
725 | } | |
726 | ||
c25aaf81 KS |
727 | return msg_size; |
728 | } | |
729 | ||
3a8963ac | 730 | static inline int netvsc_send_pkt( |
0a1275ca | 731 | struct hv_device *device, |
7c3877f2 | 732 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 733 | struct netvsc_device *net_device, |
3a3d9a0a KS |
734 | struct hv_page_buffer **pb, |
735 | struct sk_buff *skb) | |
fceaf24a | 736 | { |
7c3877f2 | 737 | struct nvsp_message nvmsg; |
b8b835a8 | 738 | struct netvsc_channel *nvchan |
739 | = &net_device->chan_table[packet->q_idx]; | |
740 | struct vmbus_channel *out_channel = nvchan->channel; | |
0a1275ca | 741 | struct net_device *ndev = hv_get_drvdata(device); |
b8b835a8 | 742 | struct netdev_queue *txq = netdev_get_tx_queue(ndev, packet->q_idx); |
7c3877f2 HZ |
743 | u64 req_id; |
744 | int ret; | |
aa0a34be | 745 | struct hv_page_buffer *pgbuf; |
82fa3c77 | 746 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
c25aaf81 | 747 | |
7c3877f2 | 748 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
694a9fb0 | 749 | if (skb != NULL) { |
21a80820 | 750 | /* 0 is RMC_DATA; */ |
7c3877f2 | 751 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
752 | } else { |
753 | /* 1 is RMC_CONTROL; */ | |
7c3877f2 | 754 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 755 | } |
fceaf24a | 756 | |
7c3877f2 HZ |
757 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
758 | packet->send_buf_index; | |
759 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) | |
760 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
761 | else | |
762 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = | |
763 | packet->total_data_buflen; | |
21a80820 | 764 | |
3a3d9a0a | 765 | req_id = (ulong)skb; |
f1ea3cd7 | 766 | |
c3582a2c HZ |
767 | if (out_channel->rescind) |
768 | return -ENODEV; | |
769 | ||
72a2f5bd | 770 | if (packet->page_buf_cnt) { |
a9f2e2d6 KS |
771 | pgbuf = packet->cp_partial ? (*pb) + |
772 | packet->rmsg_pgcnt : (*pb); | |
82fa3c77 KS |
773 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
774 | pgbuf, | |
775 | packet->page_buf_cnt, | |
776 | &nvmsg, | |
777 | sizeof(struct nvsp_message), | |
778 | req_id, | |
3454323c | 779 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 780 | } else { |
82fa3c77 KS |
781 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
782 | sizeof(struct nvsp_message), | |
783 | req_id, | |
784 | VM_PKT_DATA_INBAND, | |
3454323c | 785 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
fceaf24a HJ |
786 | } |
787 | ||
1d06825b | 788 | if (ret == 0) { |
b8b835a8 | 789 | atomic_inc_return(&nvchan->queue_sends); |
5b54dac8 | 790 | |
46b4f7f5 | 791 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) |
b8b835a8 | 792 | netif_tx_stop_queue(txq); |
1d06825b | 793 | } else if (ret == -EAGAIN) { |
b8b835a8 | 794 | netif_tx_stop_queue(txq); |
795 | if (atomic_read(&nvchan->queue_sends) < 1) { | |
796 | netif_tx_wake_queue(txq); | |
33be96e4 HZ |
797 | ret = -ENOSPC; |
798 | } | |
1d06825b | 799 | } else { |
d9871158 | 800 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
85799a37 | 801 | packet, ret); |
1d06825b | 802 | } |
fceaf24a | 803 | |
7c3877f2 HZ |
804 | return ret; |
805 | } | |
806 | ||
c85e4924 HZ |
807 | /* Move packet out of multi send data (msd), and clear msd */ |
808 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, | |
809 | struct sk_buff **msd_skb, | |
810 | struct multi_send_data *msdp) | |
811 | { | |
812 | *msd_skb = msdp->skb; | |
813 | *msd_send = msdp->pkt; | |
814 | msdp->skb = NULL; | |
815 | msdp->pkt = NULL; | |
816 | msdp->count = 0; | |
817 | } | |
818 | ||
7c3877f2 | 819 | int netvsc_send(struct hv_device *device, |
24476760 | 820 | struct hv_netvsc_packet *packet, |
a9f2e2d6 | 821 | struct rndis_message *rndis_msg, |
3a3d9a0a KS |
822 | struct hv_page_buffer **pb, |
823 | struct sk_buff *skb) | |
7c3877f2 HZ |
824 | { |
825 | struct netvsc_device *net_device; | |
6c4c137e | 826 | int ret = 0; |
b8b835a8 | 827 | struct netvsc_channel *nvchan; |
7c3877f2 HZ |
828 | u32 pktlen = packet->total_data_buflen, msd_len = 0; |
829 | unsigned int section_index = NETVSC_INVALID_INDEX; | |
7c3877f2 HZ |
830 | struct multi_send_data *msdp; |
831 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; | |
c85e4924 | 832 | struct sk_buff *msd_skb = NULL; |
aa0a34be | 833 | bool try_batch; |
bde79be5 | 834 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
7c3877f2 HZ |
835 | |
836 | net_device = get_outbound_net_device(device); | |
837 | if (!net_device) | |
838 | return -ENODEV; | |
839 | ||
e8f0a89c VK |
840 | /* We may race with netvsc_connect_vsp()/netvsc_init_buf() and get |
841 | * here before the negotiation with the host is finished and | |
842 | * send_section_map may not be allocated yet. | |
843 | */ | |
844 | if (!net_device->send_section_map) | |
845 | return -EAGAIN; | |
846 | ||
b8b835a8 | 847 | nvchan = &net_device->chan_table[packet->q_idx]; |
7c3877f2 | 848 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
aa0a34be | 849 | packet->cp_partial = false; |
7c3877f2 | 850 | |
cf8190e4 HZ |
851 | /* Send control message directly without accessing msd (Multi-Send |
852 | * Data) field which may be changed during data packet processing. | |
853 | */ | |
854 | if (!skb) { | |
855 | cur_send = packet; | |
856 | goto send_now; | |
857 | } | |
858 | ||
7c3877f2 | 859 | /* batch packets in send buffer if possible */ |
b8b835a8 | 860 | msdp = &nvchan->msd; |
7c3877f2 HZ |
861 | if (msdp->pkt) |
862 | msd_len = msdp->pkt->total_data_buflen; | |
863 | ||
694a9fb0 | 864 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
aa0a34be HZ |
865 | net_device->max_pkt; |
866 | ||
867 | if (try_batch && msd_len + pktlen + net_device->pkt_align < | |
7c3877f2 HZ |
868 | net_device->send_section_size) { |
869 | section_index = msdp->pkt->send_buf_index; | |
870 | ||
aa0a34be HZ |
871 | } else if (try_batch && msd_len + packet->rmsg_size < |
872 | net_device->send_section_size) { | |
873 | section_index = msdp->pkt->send_buf_index; | |
874 | packet->cp_partial = true; | |
875 | ||
694a9fb0 | 876 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
7c3877f2 HZ |
877 | net_device->send_section_size) { |
878 | section_index = netvsc_get_next_send_section(net_device); | |
879 | if (section_index != NETVSC_INVALID_INDEX) { | |
c85e4924 HZ |
880 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
881 | msd_len = 0; | |
7c3877f2 HZ |
882 | } |
883 | } | |
884 | ||
885 | if (section_index != NETVSC_INVALID_INDEX) { | |
886 | netvsc_copy_to_send_buf(net_device, | |
887 | section_index, msd_len, | |
694a9fb0 | 888 | packet, rndis_msg, pb, skb); |
b08cc791 | 889 | |
7c3877f2 | 890 | packet->send_buf_index = section_index; |
aa0a34be HZ |
891 | |
892 | if (packet->cp_partial) { | |
893 | packet->page_buf_cnt -= packet->rmsg_pgcnt; | |
894 | packet->total_data_buflen = msd_len + packet->rmsg_size; | |
895 | } else { | |
896 | packet->page_buf_cnt = 0; | |
897 | packet->total_data_buflen += msd_len; | |
aa0a34be | 898 | } |
7c3877f2 | 899 | |
793e3955 | 900 | if (msdp->pkt) { |
901 | packet->total_packets += msdp->pkt->total_packets; | |
902 | packet->total_bytes += msdp->pkt->total_bytes; | |
903 | } | |
904 | ||
c85e4924 | 905 | if (msdp->skb) |
17db4bce | 906 | dev_consume_skb_any(msdp->skb); |
ee90b812 | 907 | |
bde79be5 | 908 | if (xmit_more && !packet->cp_partial) { |
c85e4924 | 909 | msdp->skb = skb; |
7c3877f2 HZ |
910 | msdp->pkt = packet; |
911 | msdp->count++; | |
912 | } else { | |
913 | cur_send = packet; | |
c85e4924 | 914 | msdp->skb = NULL; |
7c3877f2 HZ |
915 | msdp->pkt = NULL; |
916 | msdp->count = 0; | |
917 | } | |
918 | } else { | |
c85e4924 | 919 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
7c3877f2 HZ |
920 | cur_send = packet; |
921 | } | |
922 | ||
7c3877f2 | 923 | if (msd_send) { |
6c4c137e SH |
924 | int m_ret = netvsc_send_pkt(device, msd_send, net_device, |
925 | NULL, msd_skb); | |
7c3877f2 HZ |
926 | |
927 | if (m_ret != 0) { | |
928 | netvsc_free_send_slot(net_device, | |
929 | msd_send->send_buf_index); | |
c85e4924 | 930 | dev_kfree_skb_any(msd_skb); |
7c3877f2 HZ |
931 | } |
932 | } | |
933 | ||
cf8190e4 | 934 | send_now: |
7c3877f2 | 935 | if (cur_send) |
0a1275ca | 936 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
7c3877f2 | 937 | |
7aab5159 JS |
938 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
939 | netvsc_free_send_slot(net_device, section_index); | |
d953ca4d | 940 | |
fceaf24a HJ |
941 | return ret; |
942 | } | |
943 | ||
c0b558e5 HZ |
944 | static int netvsc_send_recv_completion(struct vmbus_channel *channel, |
945 | u64 transaction_id, u32 status) | |
5fa9d3c5 HZ |
946 | { |
947 | struct nvsp_message recvcompMessage; | |
5fa9d3c5 HZ |
948 | int ret; |
949 | ||
950 | recvcompMessage.hdr.msg_type = | |
951 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
952 | ||
63f6921d | 953 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
5fa9d3c5 | 954 | |
5fa9d3c5 | 955 | /* Send the completion */ |
5b54dac8 | 956 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
c0b558e5 HZ |
957 | sizeof(struct nvsp_message_header) + sizeof(u32), |
958 | transaction_id, VM_PKT_COMP, 0); | |
959 | ||
960 | return ret; | |
961 | } | |
962 | ||
963 | static inline void count_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx, | |
964 | u32 *filled, u32 *avail) | |
965 | { | |
b8b835a8 | 966 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
967 | u32 first = mrc->first; | |
968 | u32 next = mrc->next; | |
c0b558e5 HZ |
969 | |
970 | *filled = (first > next) ? NETVSC_RECVSLOT_MAX - first + next : | |
971 | next - first; | |
972 | ||
973 | *avail = NETVSC_RECVSLOT_MAX - *filled - 1; | |
974 | } | |
975 | ||
976 | /* Read the first filled slot, no change to index */ | |
977 | static inline struct recv_comp_data *read_recv_comp_slot(struct netvsc_device | |
978 | *nvdev, u16 q_idx) | |
979 | { | |
b8b835a8 | 980 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
981 | u32 filled, avail; |
982 | ||
b8b835a8 | 983 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
984 | return NULL; |
985 | ||
986 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
987 | if (!filled) | |
988 | return NULL; | |
989 | ||
b8b835a8 | 990 | return mrc->buf + mrc->first * sizeof(struct recv_comp_data); |
c0b558e5 HZ |
991 | } |
992 | ||
993 | /* Put the first filled slot back to available pool */ | |
994 | static inline void put_recv_comp_slot(struct netvsc_device *nvdev, u16 q_idx) | |
995 | { | |
b8b835a8 | 996 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
997 | int num_recv; |
998 | ||
b8b835a8 | 999 | mrc->first = (mrc->first + 1) % NETVSC_RECVSLOT_MAX; |
c0b558e5 HZ |
1000 | |
1001 | num_recv = atomic_dec_return(&nvdev->num_outstanding_recvs); | |
1002 | ||
1003 | if (nvdev->destroy && num_recv == 0) | |
1004 | wake_up(&nvdev->wait_drain); | |
1005 | } | |
1006 | ||
1007 | /* Check and send pending recv completions */ | |
1008 | static void netvsc_chk_recv_comp(struct netvsc_device *nvdev, | |
1009 | struct vmbus_channel *channel, u16 q_idx) | |
1010 | { | |
1011 | struct recv_comp_data *rcd; | |
1012 | int ret; | |
1013 | ||
1014 | while (true) { | |
1015 | rcd = read_recv_comp_slot(nvdev, q_idx); | |
1016 | if (!rcd) | |
1017 | break; | |
1018 | ||
1019 | ret = netvsc_send_recv_completion(channel, rcd->tid, | |
1020 | rcd->status); | |
1021 | if (ret) | |
1022 | break; | |
1023 | ||
1024 | put_recv_comp_slot(nvdev, q_idx); | |
5fa9d3c5 HZ |
1025 | } |
1026 | } | |
1027 | ||
c0b558e5 HZ |
1028 | #define NETVSC_RCD_WATERMARK 80 |
1029 | ||
1030 | /* Get next available slot */ | |
1031 | static inline struct recv_comp_data *get_recv_comp_slot( | |
1032 | struct netvsc_device *nvdev, struct vmbus_channel *channel, u16 q_idx) | |
1033 | { | |
b8b835a8 | 1034 | struct multi_recv_comp *mrc = &nvdev->chan_table[q_idx].mrc; |
c0b558e5 HZ |
1035 | u32 filled, avail, next; |
1036 | struct recv_comp_data *rcd; | |
1037 | ||
b8b835a8 | 1038 | if (unlikely(!nvdev->recv_section)) |
c0b558e5 HZ |
1039 | return NULL; |
1040 | ||
b8b835a8 | 1041 | if (unlikely(!mrc->buf)) |
c0b558e5 HZ |
1042 | return NULL; |
1043 | ||
1044 | if (atomic_read(&nvdev->num_outstanding_recvs) > | |
1045 | nvdev->recv_section->num_sub_allocs * NETVSC_RCD_WATERMARK / 100) | |
1046 | netvsc_chk_recv_comp(nvdev, channel, q_idx); | |
1047 | ||
1048 | count_recv_comp_slot(nvdev, q_idx, &filled, &avail); | |
1049 | if (!avail) | |
1050 | return NULL; | |
1051 | ||
b8b835a8 | 1052 | next = mrc->next; |
1053 | rcd = mrc->buf + next * sizeof(struct recv_comp_data); | |
1054 | mrc->next = (next + 1) % NETVSC_RECVSLOT_MAX; | |
c0b558e5 HZ |
1055 | |
1056 | atomic_inc(&nvdev->num_outstanding_recvs); | |
1057 | ||
1058 | return rcd; | |
1059 | } | |
1060 | ||
15a863bf | 1061 | static int netvsc_receive(struct net_device *ndev, |
dc54a08c | 1062 | struct netvsc_device *net_device, |
1063 | struct net_device_context *net_device_ctx, | |
1064 | struct hv_device *device, | |
1065 | struct vmbus_channel *channel, | |
f3dd3f47 | 1066 | const struct vmpacket_descriptor *desc, |
dc54a08c | 1067 | struct nvsp_message *nvsp) |
fceaf24a | 1068 | { |
f3dd3f47 | 1069 | const struct vmtransfer_page_packet_header *vmxferpage_packet |
1070 | = container_of(desc, const struct vmtransfer_page_packet_header, d); | |
15a863bf | 1071 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
dc54a08c | 1072 | char *recv_buf = net_device->recv_buf; |
4baab261 | 1073 | u32 status = NVSP_STAT_SUCCESS; |
45326342 HZ |
1074 | int i; |
1075 | int count = 0; | |
c0b558e5 | 1076 | int ret; |
779b4d17 | 1077 | |
454f18a9 | 1078 | /* Make sure this is a valid nvsp packet */ |
dc54a08c | 1079 | if (unlikely(nvsp->hdr.msg_type != NVSP_MSG1_TYPE_SEND_RNDIS_PKT)) { |
1080 | netif_err(net_device_ctx, rx_err, ndev, | |
1081 | "Unknown nvsp packet type received %u\n", | |
1082 | nvsp->hdr.msg_type); | |
15a863bf | 1083 | return 0; |
fceaf24a HJ |
1084 | } |
1085 | ||
dc54a08c | 1086 | if (unlikely(vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID)) { |
1087 | netif_err(net_device_ctx, rx_err, ndev, | |
1088 | "Invalid xfer page set id - expecting %x got %x\n", | |
1089 | NETVSC_RECEIVE_BUFFER_ID, | |
1090 | vmxferpage_packet->xfer_pageset_id); | |
15a863bf | 1091 | return 0; |
fceaf24a HJ |
1092 | } |
1093 | ||
4baab261 | 1094 | count = vmxferpage_packet->range_cnt; |
fceaf24a | 1095 | |
454f18a9 | 1096 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
4baab261 | 1097 | for (i = 0; i < count; i++) { |
dc54a08c | 1098 | void *data = recv_buf |
1099 | + vmxferpage_packet->ranges[i].byte_offset; | |
1100 | u32 buflen = vmxferpage_packet->ranges[i].byte_count; | |
fceaf24a | 1101 | |
454f18a9 | 1102 | /* Pass it to the upper layer */ |
dc54a08c | 1103 | status = rndis_filter_receive(ndev, net_device, device, |
1104 | channel, data, buflen); | |
fceaf24a HJ |
1105 | } |
1106 | ||
15a863bf | 1107 | if (net_device->chan_table[q_idx].mrc.buf) { |
1108 | struct recv_comp_data *rcd; | |
1109 | ||
1110 | rcd = get_recv_comp_slot(net_device, channel, q_idx); | |
1111 | if (rcd) { | |
1112 | rcd->tid = vmxferpage_packet->d.trans_id; | |
1113 | rcd->status = status; | |
1114 | } else { | |
1115 | netdev_err(ndev, "Recv_comp full buf q:%hd, tid:%llx\n", | |
1116 | q_idx, vmxferpage_packet->d.trans_id); | |
1117 | } | |
1118 | } else { | |
c0b558e5 HZ |
1119 | ret = netvsc_send_recv_completion(channel, |
1120 | vmxferpage_packet->d.trans_id, | |
1121 | status); | |
1122 | if (ret) | |
1123 | netdev_err(ndev, "Recv_comp q:%hd, tid:%llx, err:%d\n", | |
1124 | q_idx, vmxferpage_packet->d.trans_id, ret); | |
c0b558e5 | 1125 | } |
15a863bf | 1126 | return count; |
fceaf24a HJ |
1127 | } |
1128 | ||
5b54dac8 | 1129 | static void netvsc_send_table(struct hv_device *hdev, |
71790a27 | 1130 | struct nvsp_message *nvmsg) |
5b54dac8 HZ |
1131 | { |
1132 | struct netvsc_device *nvscdev; | |
0a1275ca | 1133 | struct net_device *ndev = hv_get_drvdata(hdev); |
5b54dac8 HZ |
1134 | int i; |
1135 | u32 count, *tab; | |
1136 | ||
1137 | nvscdev = get_outbound_net_device(hdev); | |
1138 | if (!nvscdev) | |
1139 | return; | |
5b54dac8 | 1140 | |
5b54dac8 HZ |
1141 | count = nvmsg->msg.v5_msg.send_table.count; |
1142 | if (count != VRSS_SEND_TAB_SIZE) { | |
1143 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + | |
1148 | nvmsg->msg.v5_msg.send_table.offset); | |
1149 | ||
1150 | for (i = 0; i < count; i++) | |
1151 | nvscdev->send_table[i] = tab[i]; | |
1152 | } | |
1153 | ||
f9a7da91 | 1154 | static void netvsc_send_vf(struct net_device_context *net_device_ctx, |
71790a27 HZ |
1155 | struct nvsp_message *nvmsg) |
1156 | { | |
f9a7da91 VK |
1157 | net_device_ctx->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
1158 | net_device_ctx->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; | |
71790a27 HZ |
1159 | } |
1160 | ||
1161 | static inline void netvsc_receive_inband(struct hv_device *hdev, | |
f9a7da91 VK |
1162 | struct net_device_context *net_device_ctx, |
1163 | struct nvsp_message *nvmsg) | |
71790a27 HZ |
1164 | { |
1165 | switch (nvmsg->hdr.msg_type) { | |
1166 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: | |
1167 | netvsc_send_table(hdev, nvmsg); | |
1168 | break; | |
1169 | ||
1170 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: | |
f9a7da91 | 1171 | netvsc_send_vf(net_device_ctx, nvmsg); |
71790a27 HZ |
1172 | break; |
1173 | } | |
1174 | } | |
1175 | ||
15a863bf | 1176 | static int netvsc_process_raw_pkt(struct hv_device *device, |
1177 | struct vmbus_channel *channel, | |
1178 | struct netvsc_device *net_device, | |
1179 | struct net_device *ndev, | |
1180 | u64 request_id, | |
1181 | const struct vmpacket_descriptor *desc) | |
99a50bb1 | 1182 | { |
f9a7da91 | 1183 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
f3dd3f47 | 1184 | struct nvsp_message *nvmsg = hv_pkt_data(desc); |
99a50bb1 S |
1185 | |
1186 | switch (desc->type) { | |
1187 | case VM_PKT_COMP: | |
1188 | netvsc_send_completion(net_device, channel, device, desc); | |
1189 | break; | |
1190 | ||
1191 | case VM_PKT_DATA_USING_XFER_PAGES: | |
15a863bf | 1192 | return netvsc_receive(ndev, net_device, net_device_ctx, |
1193 | device, channel, desc, nvmsg); | |
99a50bb1 S |
1194 | break; |
1195 | ||
1196 | case VM_PKT_DATA_INBAND: | |
f9a7da91 | 1197 | netvsc_receive_inband(device, net_device_ctx, nvmsg); |
99a50bb1 S |
1198 | break; |
1199 | ||
1200 | default: | |
1201 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", | |
1202 | desc->type, request_id); | |
1203 | break; | |
1204 | } | |
15a863bf | 1205 | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | static struct hv_device *netvsc_channel_to_device(struct vmbus_channel *channel) | |
1210 | { | |
1211 | struct vmbus_channel *primary = channel->primary_channel; | |
1212 | ||
1213 | return primary ? primary->device_obj : channel->device_obj; | |
1214 | } | |
1215 | ||
1216 | int netvsc_poll(struct napi_struct *napi, int budget) | |
1217 | { | |
1218 | struct netvsc_channel *nvchan | |
1219 | = container_of(napi, struct netvsc_channel, napi); | |
1220 | struct vmbus_channel *channel = nvchan->channel; | |
1221 | struct hv_device *device = netvsc_channel_to_device(channel); | |
1222 | u16 q_idx = channel->offermsg.offer.sub_channel_index; | |
1223 | struct net_device *ndev = hv_get_drvdata(device); | |
1224 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); | |
1225 | const struct vmpacket_descriptor *desc; | |
1226 | int work_done = 0; | |
1227 | ||
1228 | desc = hv_pkt_iter_first(channel); | |
1229 | while (desc) { | |
1230 | int count; | |
1231 | ||
1232 | count = netvsc_process_raw_pkt(device, channel, net_device, | |
1233 | ndev, desc->trans_id, desc); | |
1234 | work_done += count; | |
1235 | desc = __hv_pkt_iter_next(channel, desc); | |
1236 | ||
1237 | /* If receive packet budget is exhausted, reschedule */ | |
1238 | if (work_done >= budget) { | |
1239 | work_done = budget; | |
1240 | break; | |
1241 | } | |
1242 | } | |
1243 | hv_pkt_iter_close(channel); | |
1244 | ||
1245 | /* If ring is empty and NAPI is not doing polling */ | |
1246 | if (work_done < budget && | |
1247 | napi_complete_done(napi, work_done) && | |
1248 | hv_end_read(&channel->inbound) != 0) | |
1249 | napi_reschedule(napi); | |
1250 | ||
1251 | netvsc_chk_recv_comp(net_device, channel, q_idx); | |
1252 | return work_done; | |
99a50bb1 S |
1253 | } |
1254 | ||
5b54dac8 | 1255 | void netvsc_channel_cb(void *context) |
fceaf24a | 1256 | { |
0b307ebd | 1257 | struct vmbus_channel *channel = context; |
15a863bf | 1258 | struct hv_device *device = netvsc_channel_to_device(channel); |
c0b558e5 | 1259 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
85799a37 | 1260 | struct netvsc_device *net_device; |
2ddd5e5f | 1261 | struct net_device *ndev; |
fceaf24a | 1262 | |
46b4f7f5 | 1263 | ndev = hv_get_drvdata(device); |
1264 | if (unlikely(!ndev)) | |
ee0c4c39 | 1265 | return; |
0b307ebd | 1266 | |
15a863bf | 1267 | /* disable interupts from host */ |
1268 | hv_begin_read(&channel->inbound); | |
0d6dd357 | 1269 | |
1270 | net_device = net_device_to_netvsc_device(ndev); | |
15a863bf | 1271 | napi_schedule(&net_device->chan_table[q_idx].napi); |
fceaf24a | 1272 | } |
af24ce42 | 1273 | |
b637e023 HZ |
1274 | /* |
1275 | * netvsc_device_add - Callback when the device belonging to this | |
1276 | * driver is added | |
1277 | */ | |
2c7f83ca | 1278 | int netvsc_device_add(struct hv_device *device, |
1279 | const struct netvsc_device_info *device_info) | |
b637e023 | 1280 | { |
88098834 | 1281 | int i, ret = 0; |
2c7f83ca | 1282 | int ring_size = device_info->ring_size; |
b637e023 | 1283 | struct netvsc_device *net_device; |
88098834 VK |
1284 | struct net_device *ndev = hv_get_drvdata(device); |
1285 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
b637e023 | 1286 | |
88098834 | 1287 | net_device = alloc_net_device(); |
b1c84927 DC |
1288 | if (!net_device) |
1289 | return -ENOMEM; | |
b637e023 | 1290 | |
5b54dac8 HZ |
1291 | net_device->ring_size = ring_size; |
1292 | ||
15a863bf | 1293 | /* Because the device uses NAPI, all the interrupt batching and |
1294 | * control is done via Net softirq, not the channel handling | |
1295 | */ | |
1296 | set_channel_read_mode(device->channel, HV_CALL_ISR); | |
1297 | ||
b637e023 | 1298 | /* Open the channel */ |
aae23986 S |
1299 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
1300 | ring_size * PAGE_SIZE, NULL, 0, | |
5b54dac8 | 1301 | netvsc_channel_cb, device->channel); |
b637e023 HZ |
1302 | |
1303 | if (ret != 0) { | |
d9871158 | 1304 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
b637e023 HZ |
1305 | goto cleanup; |
1306 | } | |
1307 | ||
1308 | /* Channel is opened */ | |
93ba2222 | 1309 | netdev_dbg(ndev, "hv_netvsc channel opened successfully\n"); |
b637e023 | 1310 | |
88098834 VK |
1311 | /* If we're reopening the device we may have multiple queues, fill the |
1312 | * chn_table with the default channel to use it before subchannels are | |
1313 | * opened. | |
1314 | */ | |
15a863bf | 1315 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) { |
1316 | struct netvsc_channel *nvchan = &net_device->chan_table[i]; | |
1317 | ||
1318 | nvchan->channel = device->channel; | |
1319 | netif_napi_add(ndev, &nvchan->napi, | |
1320 | netvsc_poll, NAPI_POLL_WEIGHT); | |
1321 | } | |
1322 | ||
1323 | /* Enable NAPI handler for init callbacks */ | |
1324 | napi_enable(&net_device->chan_table[0].napi); | |
88098834 VK |
1325 | |
1326 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is | |
1327 | * populated. | |
1328 | */ | |
1329 | wmb(); | |
1330 | ||
1331 | net_device_ctx->nvdev = net_device; | |
5b54dac8 | 1332 | |
b637e023 HZ |
1333 | /* Connect with the NetVsp */ |
1334 | ret = netvsc_connect_vsp(device); | |
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: | |
15a863bf | 1344 | napi_disable(&net_device->chan_table[0].napi); |
1345 | ||
b637e023 HZ |
1346 | /* Now, we can close the channel safely */ |
1347 | vmbus_close(device->channel); | |
1348 | ||
1349 | cleanup: | |
f90251c8 | 1350 | free_netvsc_device(net_device); |
b637e023 HZ |
1351 | |
1352 | return ret; | |
1353 | } |