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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 | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
d0e94d17 | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 19 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 20 | */ |
eb335bc4 HJ |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
5654e932 | 23 | #include <linux/kernel.h> |
0c3b7b2f S |
24 | #include <linux/sched.h> |
25 | #include <linux/wait.h> | |
0ffa63b0 | 26 | #include <linux/mm.h> |
b4362c9c | 27 | #include <linux/delay.h> |
21a80820 | 28 | #include <linux/io.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
3f335ea2 S |
30 | |
31 | #include "hyperv.h" | |
5ca7252a | 32 | #include "hyperv_net.h" |
fceaf24a HJ |
33 | |
34 | ||
5a71ae30 | 35 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 36 | { |
85799a37 | 37 | struct netvsc_device *net_device; |
fceaf24a | 38 | |
85799a37 HZ |
39 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
40 | if (!net_device) | |
fceaf24a HJ |
41 | return NULL; |
42 | ||
454f18a9 | 43 | /* Set to 2 to allow both inbound and outbound traffic */ |
509ee387 | 44 | atomic_set(&net_device->refcnt, 2); |
fceaf24a | 45 | |
c38b9c71 | 46 | net_device->destroy = false; |
53d21fdb | 47 | net_device->dev = device; |
ca623ad3 | 48 | device->ext = net_device; |
fceaf24a | 49 | |
85799a37 | 50 | return net_device; |
fceaf24a HJ |
51 | } |
52 | ||
454f18a9 | 53 | /* Get the net device object iff exists and its refcount > 1 */ |
5a71ae30 | 54 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 55 | { |
85799a37 | 56 | struct netvsc_device *net_device; |
fceaf24a | 57 | |
ca623ad3 | 58 | net_device = device->ext; |
2ef77143 S |
59 | if (net_device && (atomic_read(&net_device->refcnt) > 1) && |
60 | !net_device->destroy) | |
53d21fdb | 61 | atomic_inc(&net_device->refcnt); |
fceaf24a | 62 | else |
85799a37 | 63 | net_device = NULL; |
fceaf24a | 64 | |
85799a37 | 65 | return net_device; |
fceaf24a HJ |
66 | } |
67 | ||
454f18a9 | 68 | /* Get the net device object iff exists and its refcount > 0 */ |
5a71ae30 | 69 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 70 | { |
85799a37 | 71 | struct netvsc_device *net_device; |
fceaf24a | 72 | |
ca623ad3 | 73 | net_device = device->ext; |
53d21fdb HZ |
74 | if (net_device && atomic_read(&net_device->refcnt)) |
75 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 76 | else |
85799a37 | 77 | net_device = NULL; |
fceaf24a | 78 | |
85799a37 | 79 | return net_device; |
fceaf24a HJ |
80 | } |
81 | ||
5a71ae30 | 82 | static void put_net_device(struct hv_device *device) |
fceaf24a | 83 | { |
85799a37 | 84 | struct netvsc_device *net_device; |
fceaf24a | 85 | |
ca623ad3 | 86 | net_device = device->ext; |
fceaf24a | 87 | |
53d21fdb | 88 | atomic_dec(&net_device->refcnt); |
fceaf24a HJ |
89 | } |
90 | ||
5a71ae30 HZ |
91 | static struct netvsc_device *release_outbound_net_device( |
92 | struct hv_device *device) | |
fceaf24a | 93 | { |
85799a37 | 94 | struct netvsc_device *net_device; |
fceaf24a | 95 | |
ca623ad3 | 96 | net_device = device->ext; |
85799a37 | 97 | if (net_device == NULL) |
fceaf24a HJ |
98 | return NULL; |
99 | ||
454f18a9 | 100 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
53d21fdb | 101 | while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2) |
b4362c9c | 102 | udelay(100); |
fceaf24a | 103 | |
85799a37 | 104 | return net_device; |
fceaf24a HJ |
105 | } |
106 | ||
5a71ae30 HZ |
107 | static struct netvsc_device *release_inbound_net_device( |
108 | struct hv_device *device) | |
fceaf24a | 109 | { |
85799a37 | 110 | struct netvsc_device *net_device; |
fceaf24a | 111 | |
ca623ad3 | 112 | net_device = device->ext; |
85799a37 | 113 | if (net_device == NULL) |
fceaf24a HJ |
114 | return NULL; |
115 | ||
454f18a9 | 116 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
53d21fdb | 117 | while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1) |
b4362c9c | 118 | udelay(100); |
fceaf24a | 119 | |
ca623ad3 | 120 | device->ext = NULL; |
85799a37 | 121 | return net_device; |
fceaf24a HJ |
122 | } |
123 | ||
ec91cd09 HZ |
124 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
125 | { | |
126 | struct nvsp_message *revoke_packet; | |
127 | int ret = 0; | |
128 | ||
129 | /* | |
130 | * If we got a section count, it means we received a | |
131 | * SendReceiveBufferComplete msg (ie sent | |
132 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
133 | * to send a revoke msg here | |
134 | */ | |
135 | if (net_device->recv_section_cnt) { | |
136 | /* Send the revoke receive buffer */ | |
137 | revoke_packet = &net_device->revoke_packet; | |
138 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); | |
139 | ||
140 | revoke_packet->hdr.msg_type = | |
141 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
142 | revoke_packet->msg.v1_msg. | |
143 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
144 | ||
145 | ret = vmbus_sendpacket(net_device->dev->channel, | |
146 | revoke_packet, | |
147 | sizeof(struct nvsp_message), | |
148 | (unsigned long)revoke_packet, | |
149 | VM_PKT_DATA_INBAND, 0); | |
150 | /* | |
151 | * If we failed here, we might as well return and | |
152 | * have a leak rather than continue and a bugchk | |
153 | */ | |
154 | if (ret != 0) { | |
155 | dev_err(&net_device->dev->device, "unable to send " | |
156 | "revoke receive buffer to netvsp"); | |
a3e00530 | 157 | return ret; |
ec91cd09 HZ |
158 | } |
159 | } | |
160 | ||
161 | /* Teardown the gpadl on the vsp end */ | |
162 | if (net_device->recv_buf_gpadl_handle) { | |
163 | ret = vmbus_teardown_gpadl(net_device->dev->channel, | |
164 | net_device->recv_buf_gpadl_handle); | |
165 | ||
166 | /* If we failed here, we might as well return and have a leak | |
167 | * rather than continue and a bugchk | |
168 | */ | |
169 | if (ret != 0) { | |
170 | dev_err(&net_device->dev->device, | |
171 | "unable to teardown receive buffer's gpadl"); | |
a3e00530 | 172 | return -ret; |
ec91cd09 HZ |
173 | } |
174 | net_device->recv_buf_gpadl_handle = 0; | |
175 | } | |
176 | ||
177 | if (net_device->recv_buf) { | |
178 | /* Free up the receive buffer */ | |
179 | free_pages((unsigned long)net_device->recv_buf, | |
180 | get_order(net_device->recv_buf_size)); | |
181 | net_device->recv_buf = NULL; | |
182 | } | |
183 | ||
184 | if (net_device->recv_section) { | |
185 | net_device->recv_section_cnt = 0; | |
186 | kfree(net_device->recv_section); | |
187 | net_device->recv_section = NULL; | |
188 | } | |
189 | ||
190 | return ret; | |
191 | } | |
192 | ||
5a71ae30 | 193 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 194 | { |
21a80820 | 195 | int ret = 0; |
35abb21a | 196 | int t; |
85799a37 HZ |
197 | struct netvsc_device *net_device; |
198 | struct nvsp_message *init_packet; | |
fceaf24a | 199 | |
5a71ae30 | 200 | net_device = get_outbound_net_device(device); |
85799a37 | 201 | if (!net_device) { |
eb335bc4 | 202 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 203 | "device being destroyed?"); |
927bc33c | 204 | return -ENODEV; |
fceaf24a | 205 | } |
fceaf24a | 206 | |
53d21fdb | 207 | net_device->recv_buf = |
df3493e0 S |
208 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
209 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 210 | if (!net_device->recv_buf) { |
eb335bc4 HJ |
211 | dev_err(&device->device, "unable to allocate receive " |
212 | "buffer of size %d", net_device->recv_buf_size); | |
927bc33c | 213 | ret = -ENOMEM; |
0c3b7b2f | 214 | goto cleanup; |
fceaf24a | 215 | } |
fceaf24a | 216 | |
454f18a9 BP |
217 | /* |
218 | * Establish the gpadl handle for this buffer on this | |
219 | * channel. Note: This call uses the vmbus connection rather | |
220 | * than the channel to establish the gpadl handle. | |
221 | */ | |
53d21fdb HZ |
222 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
223 | net_device->recv_buf_size, | |
224 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 225 | if (ret != 0) { |
eb335bc4 HJ |
226 | dev_err(&device->device, |
227 | "unable to establish receive buffer's gpadl"); | |
0c3b7b2f | 228 | goto cleanup; |
fceaf24a HJ |
229 | } |
230 | ||
fceaf24a | 231 | |
454f18a9 | 232 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 233 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 234 | |
85799a37 | 235 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 236 | |
53d21fdb HZ |
237 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
238 | init_packet->msg.v1_msg.send_recv_buf. | |
239 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
240 | init_packet->msg.v1_msg. | |
241 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 242 | |
454f18a9 | 243 | /* Send the gpadl notification request */ |
85799a37 | 244 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 245 | sizeof(struct nvsp_message), |
85799a37 | 246 | (unsigned long)init_packet, |
415f2287 | 247 | VM_PKT_DATA_INBAND, |
5a4df290 | 248 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 249 | if (ret != 0) { |
eb335bc4 HJ |
250 | dev_err(&device->device, |
251 | "unable to send receive buffer's gpadl to netvsp"); | |
0c3b7b2f | 252 | goto cleanup; |
fceaf24a HJ |
253 | } |
254 | ||
5c5781b3 | 255 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a | 256 | BUG_ON(t == 0); |
0c3b7b2f | 257 | |
fceaf24a | 258 | |
454f18a9 | 259 | /* Check the response */ |
53d21fdb HZ |
260 | if (init_packet->msg.v1_msg. |
261 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
eb335bc4 | 262 | dev_err(&device->device, "Unable to complete receive buffer " |
21a80820 | 263 | "initialzation with NetVsp - status %d", |
53d21fdb HZ |
264 | init_packet->msg.v1_msg. |
265 | send_recv_buf_complete.status); | |
927bc33c | 266 | ret = -EINVAL; |
0c3b7b2f | 267 | goto cleanup; |
fceaf24a HJ |
268 | } |
269 | ||
454f18a9 | 270 | /* Parse the response */ |
fceaf24a | 271 | |
53d21fdb HZ |
272 | net_device->recv_section_cnt = init_packet->msg. |
273 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 274 | |
53d21fdb | 275 | net_device->recv_section = kmalloc(net_device->recv_section_cnt |
85799a37 | 276 | * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
53d21fdb | 277 | if (net_device->recv_section == NULL) { |
927bc33c | 278 | ret = -EINVAL; |
0c3b7b2f | 279 | goto cleanup; |
fceaf24a HJ |
280 | } |
281 | ||
53d21fdb HZ |
282 | memcpy(net_device->recv_section, |
283 | init_packet->msg.v1_msg. | |
284 | send_recv_buf_complete.sections, | |
285 | net_device->recv_section_cnt * | |
85799a37 | 286 | sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 287 | |
21a80820 GKH |
288 | /* |
289 | * For 1st release, there should only be 1 section that represents the | |
290 | * entire receive buffer | |
291 | */ | |
53d21fdb HZ |
292 | if (net_device->recv_section_cnt != 1 || |
293 | net_device->recv_section->offset != 0) { | |
927bc33c | 294 | ret = -EINVAL; |
0c3b7b2f | 295 | goto cleanup; |
fceaf24a HJ |
296 | } |
297 | ||
0c3b7b2f | 298 | goto exit; |
fceaf24a | 299 | |
0c3b7b2f | 300 | cleanup: |
5a71ae30 | 301 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 302 | |
0c3b7b2f | 303 | exit: |
5a71ae30 | 304 | put_net_device(device); |
fceaf24a HJ |
305 | return ret; |
306 | } | |
307 | ||
fceaf24a | 308 | |
5a71ae30 | 309 | static int netvsc_connect_vsp(struct hv_device *device) |
fceaf24a | 310 | { |
35abb21a | 311 | int ret, t; |
85799a37 HZ |
312 | struct netvsc_device *net_device; |
313 | struct nvsp_message *init_packet; | |
314 | int ndis_version; | |
fceaf24a | 315 | |
5a71ae30 | 316 | net_device = get_outbound_net_device(device); |
85799a37 | 317 | if (!net_device) { |
eb335bc4 | 318 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 319 | "device being destroyed?"); |
0f48c72c | 320 | return -ENODEV; |
fceaf24a HJ |
321 | } |
322 | ||
53d21fdb | 323 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 324 | |
85799a37 | 325 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
326 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
327 | init_packet->msg.init_msg.init.min_protocol_ver = | |
85799a37 | 328 | NVSP_MIN_PROTOCOL_VERSION; |
53d21fdb | 329 | init_packet->msg.init_msg.init.max_protocol_ver = |
85799a37 | 330 | NVSP_MAX_PROTOCOL_VERSION; |
fceaf24a | 331 | |
454f18a9 | 332 | /* Send the init request */ |
85799a37 | 333 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 334 | sizeof(struct nvsp_message), |
85799a37 | 335 | (unsigned long)init_packet, |
415f2287 | 336 | VM_PKT_DATA_INBAND, |
5a4df290 | 337 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 338 | |
b8a3d52b | 339 | if (ret != 0) |
0c3b7b2f | 340 | goto cleanup; |
fceaf24a | 341 | |
5c5781b3 | 342 | t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); |
35abb21a S |
343 | |
344 | if (t == 0) { | |
0c3b7b2f S |
345 | ret = -ETIMEDOUT; |
346 | goto cleanup; | |
347 | } | |
fceaf24a | 348 | |
53d21fdb HZ |
349 | if (init_packet->msg.init_msg.init_complete.status != |
350 | NVSP_STAT_SUCCESS) { | |
0f48c72c | 351 | ret = -EINVAL; |
0c3b7b2f | 352 | goto cleanup; |
fceaf24a HJ |
353 | } |
354 | ||
53d21fdb HZ |
355 | if (init_packet->msg.init_msg.init_complete. |
356 | negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { | |
0f48c72c | 357 | ret = -EPROTO; |
0c3b7b2f | 358 | goto cleanup; |
fceaf24a | 359 | } |
454f18a9 | 360 | /* Send the ndis version */ |
85799a37 | 361 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 362 | |
85799a37 | 363 | ndis_version = 0x00050000; |
fceaf24a | 364 | |
53d21fdb HZ |
365 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
366 | init_packet->msg.v1_msg. | |
367 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 368 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
369 | init_packet->msg.v1_msg. |
370 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 371 | ndis_version & 0xFFFF; |
fceaf24a | 372 | |
454f18a9 | 373 | /* Send the init request */ |
85799a37 | 374 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
375 | sizeof(struct nvsp_message), |
376 | (unsigned long)init_packet, | |
377 | VM_PKT_DATA_INBAND, 0); | |
0f48c72c | 378 | if (ret != 0) |
0c3b7b2f | 379 | goto cleanup; |
454f18a9 BP |
380 | |
381 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 382 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 383 | |
0c3b7b2f | 384 | cleanup: |
5a71ae30 | 385 | put_net_device(device); |
fceaf24a HJ |
386 | return ret; |
387 | } | |
388 | ||
648dc598 | 389 | static void netvsc_disconnect_vsp(struct netvsc_device *net_device) |
fceaf24a | 390 | { |
5a71ae30 | 391 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
392 | } |
393 | ||
3e189519 | 394 | /* |
5a71ae30 | 395 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 396 | */ |
905620d1 | 397 | int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 398 | { |
85799a37 HZ |
399 | struct netvsc_device *net_device; |
400 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
c38b9c71 | 401 | unsigned long flags; |
fceaf24a | 402 | |
454f18a9 | 403 | /* Stop outbound traffic ie sends and receives completions */ |
5a71ae30 | 404 | net_device = release_outbound_net_device(device); |
85799a37 | 405 | if (!net_device) { |
eb335bc4 | 406 | dev_err(&device->device, "No net device present!!"); |
ff2bd69a | 407 | return -ENODEV; |
fceaf24a HJ |
408 | } |
409 | ||
c38b9c71 S |
410 | spin_lock_irqsave(&device->channel->inbound_lock, flags); |
411 | net_device->destroy = true; | |
412 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); | |
413 | ||
454f18a9 | 414 | /* Wait for all send completions */ |
53d21fdb | 415 | while (atomic_read(&net_device->num_outstanding_sends)) { |
eb335bc4 HJ |
416 | dev_err(&device->device, |
417 | "waiting for %d requests to complete...", | |
418 | atomic_read(&net_device->num_outstanding_sends)); | |
b4362c9c | 419 | udelay(100); |
fceaf24a HJ |
420 | } |
421 | ||
648dc598 | 422 | netvsc_disconnect_vsp(net_device); |
fceaf24a | 423 | |
454f18a9 | 424 | /* Stop inbound traffic ie receives and sends completions */ |
5a71ae30 | 425 | net_device = release_inbound_net_device(device); |
fceaf24a | 426 | |
454f18a9 | 427 | /* At this point, no one should be accessing netDevice except in here */ |
eb335bc4 | 428 | dev_notice(&device->device, "net device safe to remove"); |
fceaf24a | 429 | |
454f18a9 | 430 | /* Now, we can close the channel safely */ |
85799a37 | 431 | vmbus_close(device->channel); |
fceaf24a | 432 | |
454f18a9 | 433 | /* Release all resources */ |
85799a37 | 434 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 435 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 436 | list_del(&netvsc_packet->list_ent); |
85799a37 | 437 | kfree(netvsc_packet); |
fceaf24a HJ |
438 | } |
439 | ||
356c4657 | 440 | kfree(net_device); |
21a80820 | 441 | return 0; |
fceaf24a HJ |
442 | } |
443 | ||
5a71ae30 | 444 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 445 | struct vmpacket_descriptor *packet) |
fceaf24a | 446 | { |
85799a37 HZ |
447 | struct netvsc_device *net_device; |
448 | struct nvsp_message *nvsp_packet; | |
449 | struct hv_netvsc_packet *nvsc_packet; | |
fceaf24a | 450 | |
5a71ae30 | 451 | net_device = get_inbound_net_device(device); |
85799a37 | 452 | if (!net_device) { |
eb335bc4 | 453 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 454 | "device being destroyed?"); |
fceaf24a HJ |
455 | return; |
456 | } | |
457 | ||
85799a37 | 458 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 459 | (packet->offset8 << 3)); |
fceaf24a | 460 | |
53d21fdb HZ |
461 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
462 | (nvsp_packet->hdr.msg_type == | |
463 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
464 | (nvsp_packet->hdr.msg_type == | |
465 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 466 | /* Copy the response back */ |
53d21fdb | 467 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 468 | sizeof(struct nvsp_message)); |
35abb21a | 469 | complete(&net_device->channel_init_wait); |
53d21fdb HZ |
470 | } else if (nvsp_packet->hdr.msg_type == |
471 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
454f18a9 | 472 | /* Get the send context */ |
85799a37 | 473 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 474 | packet->trans_id; |
fceaf24a | 475 | |
454f18a9 | 476 | /* Notify the layer above us */ |
72a2f5bd HZ |
477 | nvsc_packet->completion.send.send_completion( |
478 | nvsc_packet->completion.send.send_completion_ctx); | |
fceaf24a | 479 | |
53d21fdb | 480 | atomic_dec(&net_device->num_outstanding_sends); |
21a80820 | 481 | } else { |
eb335bc4 | 482 | dev_err(&device->device, "Unknown send completion packet type- " |
53d21fdb | 483 | "%d received!!", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
484 | } |
485 | ||
5a71ae30 | 486 | put_net_device(device); |
fceaf24a HJ |
487 | } |
488 | ||
f9819f05 | 489 | int netvsc_send(struct hv_device *device, |
85799a37 | 490 | struct hv_netvsc_packet *packet) |
fceaf24a | 491 | { |
85799a37 | 492 | struct netvsc_device *net_device; |
21a80820 | 493 | int ret = 0; |
fceaf24a | 494 | |
223c1aa6 | 495 | struct nvsp_message sendMessage; |
fceaf24a | 496 | |
5a71ae30 | 497 | net_device = get_outbound_net_device(device); |
85799a37 | 498 | if (!net_device) { |
eb335bc4 | 499 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 500 | "ignoring outbound packets", net_device); |
ff2bd69a | 501 | return -ENODEV; |
fceaf24a HJ |
502 | } |
503 | ||
53d21fdb | 504 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 505 | if (packet->is_data_pkt) { |
21a80820 | 506 | /* 0 is RMC_DATA; */ |
53d21fdb | 507 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
508 | } else { |
509 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 510 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 511 | } |
fceaf24a | 512 | |
454f18a9 | 513 | /* Not using send buffer section */ |
53d21fdb HZ |
514 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
515 | 0xFFFFFFFF; | |
516 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 517 | |
72a2f5bd | 518 | if (packet->page_buf_cnt) { |
85799a37 | 519 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
520 | packet->page_buf, |
521 | packet->page_buf_cnt, | |
ff3f8eec GKH |
522 | &sendMessage, |
523 | sizeof(struct nvsp_message), | |
85799a37 | 524 | (unsigned long)packet); |
21a80820 | 525 | } else { |
85799a37 | 526 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
e4d59ac5 HZ |
527 | sizeof(struct nvsp_message), |
528 | (unsigned long)packet, | |
529 | VM_PKT_DATA_INBAND, | |
530 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
531 | |
532 | } | |
533 | ||
534 | if (ret != 0) | |
eb335bc4 | 535 | dev_err(&device->device, "Unable to send packet %p ret %d", |
85799a37 | 536 | packet, ret); |
fceaf24a | 537 | |
53d21fdb | 538 | atomic_inc(&net_device->num_outstanding_sends); |
5a71ae30 | 539 | put_net_device(device); |
fceaf24a HJ |
540 | return ret; |
541 | } | |
542 | ||
5fa9d3c5 HZ |
543 | static void netvsc_send_recv_completion(struct hv_device *device, |
544 | u64 transaction_id) | |
545 | { | |
546 | struct nvsp_message recvcompMessage; | |
547 | int retries = 0; | |
548 | int ret; | |
549 | ||
550 | recvcompMessage.hdr.msg_type = | |
551 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
552 | ||
553 | /* FIXME: Pass in the status */ | |
554 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = | |
555 | NVSP_STAT_SUCCESS; | |
556 | ||
557 | retry_send_cmplt: | |
558 | /* Send the completion */ | |
559 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, | |
560 | sizeof(struct nvsp_message), transaction_id, | |
561 | VM_PKT_COMP, 0); | |
562 | if (ret == 0) { | |
563 | /* success */ | |
564 | /* no-op */ | |
d2598f01 | 565 | } else if (ret == -EAGAIN) { |
5fa9d3c5 HZ |
566 | /* no more room...wait a bit and attempt to retry 3 times */ |
567 | retries++; | |
568 | dev_err(&device->device, "unable to send receive completion pkt" | |
569 | " (tid %llx)...retrying %d", transaction_id, retries); | |
570 | ||
571 | if (retries < 4) { | |
572 | udelay(100); | |
573 | goto retry_send_cmplt; | |
574 | } else { | |
575 | dev_err(&device->device, "unable to send receive " | |
576 | "completion pkt (tid %llx)...give up retrying", | |
577 | transaction_id); | |
578 | } | |
579 | } else { | |
580 | dev_err(&device->device, "unable to send receive " | |
581 | "completion pkt - %llx", transaction_id); | |
582 | } | |
583 | } | |
584 | ||
57991156 HZ |
585 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
586 | static void netvsc_receive_completion(void *context) | |
587 | { | |
588 | struct hv_netvsc_packet *packet = context; | |
589 | struct hv_device *device = (struct hv_device *)packet->device; | |
590 | struct netvsc_device *net_device; | |
591 | u64 transaction_id = 0; | |
592 | bool fsend_receive_comp = false; | |
593 | unsigned long flags; | |
594 | ||
595 | /* | |
596 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
597 | * send out receive completion, we are using GetInboundNetDevice() | |
598 | * since we may have disable outbound traffic already. | |
599 | */ | |
600 | net_device = get_inbound_net_device(device); | |
601 | if (!net_device) { | |
602 | dev_err(&device->device, "unable to get net device..." | |
603 | "device being destroyed?"); | |
604 | return; | |
605 | } | |
606 | ||
607 | /* Overloading use of the lock. */ | |
608 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
609 | ||
610 | packet->xfer_page_pkt->count--; | |
611 | ||
612 | /* | |
613 | * Last one in the line that represent 1 xfer page packet. | |
614 | * Return the xfer page packet itself to the freelist | |
615 | */ | |
616 | if (packet->xfer_page_pkt->count == 0) { | |
617 | fsend_receive_comp = true; | |
618 | transaction_id = packet->completion.recv.recv_completion_tid; | |
619 | list_add_tail(&packet->xfer_page_pkt->list_ent, | |
620 | &net_device->recv_pkt_list); | |
621 | ||
622 | } | |
623 | ||
624 | /* Put the packet back */ | |
625 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
626 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
627 | ||
628 | /* Send a receive completion for the xfer page packet */ | |
629 | if (fsend_receive_comp) | |
630 | netvsc_send_recv_completion(device, transaction_id); | |
631 | ||
632 | put_net_device(device); | |
633 | } | |
634 | ||
5a71ae30 | 635 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 636 | struct vmpacket_descriptor *packet) |
fceaf24a | 637 | { |
85799a37 HZ |
638 | struct netvsc_device *net_device; |
639 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
640 | struct nvsp_message *nvsp_packet; | |
641 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
c4b0bc94 | 642 | unsigned long start; |
85799a37 | 643 | unsigned long end, end_virtual; |
7e23a6e9 | 644 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 645 | struct xferpage_packet *xferpage_packet = NULL; |
21a80820 | 646 | int i, j; |
85799a37 | 647 | int count = 0, bytes_remain = 0; |
6436873a | 648 | unsigned long flags; |
779b4d17 | 649 | |
d29274ef | 650 | LIST_HEAD(listHead); |
fceaf24a | 651 | |
5a71ae30 | 652 | net_device = get_inbound_net_device(device); |
85799a37 | 653 | if (!net_device) { |
eb335bc4 | 654 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 655 | "device being destroyed?"); |
fceaf24a HJ |
656 | return; |
657 | } | |
658 | ||
21a80820 GKH |
659 | /* |
660 | * All inbound packets other than send completion should be xfer page | |
661 | * packet | |
662 | */ | |
415f2287 | 663 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
eb335bc4 | 664 | dev_err(&device->device, "Unknown packet type received - %d", |
415f2287 | 665 | packet->type); |
5a71ae30 | 666 | put_net_device(device); |
fceaf24a HJ |
667 | return; |
668 | } | |
669 | ||
85799a37 | 670 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 671 | (packet->offset8 << 3)); |
fceaf24a | 672 | |
454f18a9 | 673 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
674 | if (nvsp_packet->hdr.msg_type != |
675 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
eb335bc4 HJ |
676 | dev_err(&device->device, "Unknown nvsp packet type received-" |
677 | " %d", nvsp_packet->hdr.msg_type); | |
5a71ae30 | 678 | put_net_device(device); |
fceaf24a HJ |
679 | return; |
680 | } | |
681 | ||
85799a37 | 682 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 683 | |
415f2287 | 684 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
eb335bc4 | 685 | dev_err(&device->device, "Invalid xfer page set id - " |
21a80820 | 686 | "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 687 | vmxferpage_packet->xfer_pageset_id); |
5a71ae30 | 688 | put_net_device(device); |
fceaf24a HJ |
689 | return; |
690 | } | |
691 | ||
454f18a9 BP |
692 | /* |
693 | * Grab free packets (range count + 1) to represent this xfer | |
694 | * page packet. +1 to represent the xfer page packet itself. | |
695 | * We grab it here so that we know exactly how many we can | |
696 | * fulfil | |
697 | */ | |
53d21fdb HZ |
698 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
699 | while (!list_empty(&net_device->recv_pkt_list)) { | |
700 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 701 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
702 | break; |
703 | } | |
53d21fdb | 704 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 705 | |
454f18a9 BP |
706 | /* |
707 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
708 | * page and at least 1 for the range) i.e. we can handled | |
709 | * some of the xfer page packet ranges... | |
710 | */ | |
21a80820 | 711 | if (count < 2) { |
eb335bc4 HJ |
712 | dev_err(&device->device, "Got only %d netvsc pkt...needed " |
713 | "%d pkts. Dropping this xfer page packet completely!", | |
714 | count, vmxferpage_packet->range_cnt + 1); | |
fceaf24a | 715 | |
454f18a9 | 716 | /* Return it to the freelist */ |
53d21fdb | 717 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 718 | for (i = count; i != 0; i--) { |
92ec0893 | 719 | list_move_tail(listHead.next, |
53d21fdb | 720 | &net_device->recv_pkt_list); |
fceaf24a | 721 | } |
53d21fdb | 722 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 723 | flags); |
fceaf24a | 724 | |
5a71ae30 | 725 | netvsc_send_recv_completion(device, |
415f2287 | 726 | vmxferpage_packet->d.trans_id); |
fceaf24a | 727 | |
5a71ae30 | 728 | put_net_device(device); |
fceaf24a HJ |
729 | return; |
730 | } | |
731 | ||
454f18a9 | 732 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 733 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 734 | list_del(&xferpage_packet->list_ent); |
d29274ef | 735 | |
21a80820 | 736 | /* This is how much we can satisfy */ |
72a2f5bd | 737 | xferpage_packet->count = count - 1; |
21a80820 | 738 | |
415f2287 | 739 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
eb335bc4 HJ |
740 | dev_err(&device->device, "Needed %d netvsc pkts to satisy " |
741 | "this xfer page...got %d", | |
742 | vmxferpage_packet->range_cnt, xferpage_packet->count); | |
fceaf24a HJ |
743 | } |
744 | ||
454f18a9 | 745 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 746 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 747 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 748 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 749 | |
454f18a9 | 750 | /* Initialize the netvsc packet */ |
72a2f5bd HZ |
751 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
752 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 753 | netvsc_receive_completion; |
72a2f5bd | 754 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 755 | netvsc_packet; |
72a2f5bd | 756 | netvsc_packet->device = device; |
21a80820 | 757 | /* Save this so that we can send it back */ |
72a2f5bd | 758 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 759 | vmxferpage_packet->d.trans_id; |
fceaf24a | 760 | |
72a2f5bd | 761 | netvsc_packet->total_data_buflen = |
415f2287 | 762 | vmxferpage_packet->ranges[i].byte_count; |
72a2f5bd | 763 | netvsc_packet->page_buf_cnt = 1; |
fceaf24a | 764 | |
ca623ad3 | 765 | netvsc_packet->page_buf[0].len = |
415f2287 | 766 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 767 | |
85799a37 | 768 | start = virt_to_phys((void *)((unsigned long)net_device-> |
415f2287 | 769 | recv_buf + vmxferpage_packet->ranges[i].byte_offset)); |
fceaf24a | 770 | |
ca623ad3 | 771 | netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT; |
53d21fdb | 772 | end_virtual = (unsigned long)net_device->recv_buf |
415f2287 HZ |
773 | + vmxferpage_packet->ranges[i].byte_offset |
774 | + vmxferpage_packet->ranges[i].byte_count - 1; | |
85799a37 | 775 | end = virt_to_phys((void *)end_virtual); |
fceaf24a | 776 | |
454f18a9 | 777 | /* Calculate the page relative offset */ |
ca623ad3 | 778 | netvsc_packet->page_buf[0].offset = |
415f2287 | 779 | vmxferpage_packet->ranges[i].byte_offset & |
85799a37 | 780 | (PAGE_SIZE - 1); |
21a80820 GKH |
781 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { |
782 | /* Handle frame across multiple pages: */ | |
ca623ad3 HZ |
783 | netvsc_packet->page_buf[0].len = |
784 | (netvsc_packet->page_buf[0].pfn << | |
85799a37 | 785 | PAGE_SHIFT) |
21a80820 | 786 | + PAGE_SIZE - start; |
72a2f5bd | 787 | bytes_remain = netvsc_packet->total_data_buflen - |
ca623ad3 | 788 | netvsc_packet->page_buf[0].len; |
21a80820 | 789 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { |
ca623ad3 | 790 | netvsc_packet->page_buf[j].offset = 0; |
85799a37 | 791 | if (bytes_remain <= PAGE_SIZE) { |
ca623ad3 | 792 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
793 | bytes_remain; |
794 | bytes_remain = 0; | |
21a80820 | 795 | } else { |
ca623ad3 | 796 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
797 | PAGE_SIZE; |
798 | bytes_remain -= PAGE_SIZE; | |
21a80820 | 799 | } |
ca623ad3 | 800 | netvsc_packet->page_buf[j].pfn = |
85799a37 HZ |
801 | virt_to_phys((void *)(end_virtual - |
802 | bytes_remain)) >> PAGE_SHIFT; | |
72a2f5bd | 803 | netvsc_packet->page_buf_cnt++; |
85799a37 | 804 | if (bytes_remain == 0) |
21a80820 | 805 | break; |
fceaf24a | 806 | } |
fceaf24a | 807 | } |
fceaf24a | 808 | |
454f18a9 | 809 | /* Pass it to the upper layer */ |
ac6f7859 | 810 | rndis_filter_receive(device, netvsc_packet); |
fceaf24a | 811 | |
5a71ae30 | 812 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 813 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
814 | } |
815 | ||
5a71ae30 | 816 | put_net_device(device); |
fceaf24a HJ |
817 | } |
818 | ||
5a71ae30 | 819 | static void netvsc_channel_cb(void *context) |
fceaf24a | 820 | { |
21a80820 | 821 | int ret; |
85799a37 HZ |
822 | struct hv_device *device = context; |
823 | struct netvsc_device *net_device; | |
824 | u32 bytes_recvd; | |
825 | u64 request_id; | |
c6fcf0ba | 826 | unsigned char *packet; |
8dc0a06a | 827 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
828 | unsigned char *buffer; |
829 | int bufferlen = NETVSC_PACKET_SIZE; | |
fceaf24a | 830 | |
c6fcf0ba | 831 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 832 | GFP_ATOMIC); |
c6fcf0ba BP |
833 | if (!packet) |
834 | return; | |
835 | buffer = packet; | |
836 | ||
5a71ae30 | 837 | net_device = get_inbound_net_device(device); |
85799a37 | 838 | if (!net_device) { |
eb335bc4 | 839 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 840 | "ignoring inbound packets", net_device); |
c6fcf0ba | 841 | goto out; |
fceaf24a HJ |
842 | } |
843 | ||
21a80820 | 844 | do { |
9f630068 | 845 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 846 | &bytes_recvd, &request_id); |
21a80820 | 847 | if (ret == 0) { |
85799a37 | 848 | if (bytes_recvd > 0) { |
21a80820 | 849 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
850 | switch (desc->type) { |
851 | case VM_PKT_COMP: | |
5a71ae30 | 852 | netvsc_send_completion(device, desc); |
21a80820 GKH |
853 | break; |
854 | ||
415f2287 | 855 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 856 | netvsc_receive(device, desc); |
21a80820 GKH |
857 | break; |
858 | ||
859 | default: | |
eb335bc4 | 860 | dev_err(&device->device, |
21a80820 GKH |
861 | "unhandled packet type %d, " |
862 | "tid %llx len %d\n", | |
415f2287 | 863 | desc->type, request_id, |
85799a37 | 864 | bytes_recvd); |
21a80820 | 865 | break; |
fceaf24a HJ |
866 | } |
867 | ||
454f18a9 | 868 | /* reset */ |
c6fcf0ba | 869 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 870 | kfree(buffer); |
fceaf24a | 871 | buffer = packet; |
c6fcf0ba | 872 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a | 873 | } |
21a80820 | 874 | } else { |
454f18a9 | 875 | /* reset */ |
c6fcf0ba | 876 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 877 | kfree(buffer); |
fceaf24a | 878 | buffer = packet; |
c6fcf0ba | 879 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
880 | } |
881 | ||
882 | break; | |
883 | } | |
3d5cad97 | 884 | } else if (ret == -ENOBUFS) { |
21a80820 | 885 | /* Handle large packet */ |
85799a37 | 886 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 887 | if (buffer == NULL) { |
454f18a9 | 888 | /* Try again next time around */ |
eb335bc4 | 889 | dev_err(&device->device, |
21a80820 | 890 | "unable to allocate buffer of size " |
85799a37 | 891 | "(%d)!!", bytes_recvd); |
fceaf24a HJ |
892 | break; |
893 | } | |
894 | ||
85799a37 | 895 | bufferlen = bytes_recvd; |
fceaf24a HJ |
896 | } |
897 | } while (1); | |
898 | ||
5a71ae30 | 899 | put_net_device(device); |
c6fcf0ba BP |
900 | out: |
901 | kfree(buffer); | |
fceaf24a HJ |
902 | return; |
903 | } | |
af24ce42 | 904 | |
b637e023 HZ |
905 | /* |
906 | * netvsc_device_add - Callback when the device belonging to this | |
907 | * driver is added | |
908 | */ | |
7bd23a4d | 909 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
b637e023 HZ |
910 | { |
911 | int ret = 0; | |
912 | int i; | |
aae23986 S |
913 | int ring_size = |
914 | ((struct netvsc_device_info *)additional_info)->ring_size; | |
b637e023 HZ |
915 | struct netvsc_device *net_device; |
916 | struct hv_netvsc_packet *packet, *pos; | |
b637e023 HZ |
917 | |
918 | net_device = alloc_net_device(device); | |
919 | if (!net_device) { | |
ace163a8 | 920 | ret = -ENOMEM; |
b637e023 HZ |
921 | goto cleanup; |
922 | } | |
923 | ||
924 | /* Initialize the NetVSC channel extension */ | |
925 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
926 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
927 | ||
b637e023 HZ |
928 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
929 | ||
930 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { | |
931 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
932 | (NETVSC_RECEIVE_SG_COUNT * | |
933 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
934 | if (!packet) | |
935 | break; | |
936 | ||
937 | list_add_tail(&packet->list_ent, | |
938 | &net_device->recv_pkt_list); | |
939 | } | |
35abb21a | 940 | init_completion(&net_device->channel_init_wait); |
b637e023 HZ |
941 | |
942 | /* Open the channel */ | |
aae23986 S |
943 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
944 | ring_size * PAGE_SIZE, NULL, 0, | |
b637e023 HZ |
945 | netvsc_channel_cb, device); |
946 | ||
947 | if (ret != 0) { | |
948 | dev_err(&device->device, "unable to open channel: %d", ret); | |
b637e023 HZ |
949 | goto cleanup; |
950 | } | |
951 | ||
952 | /* Channel is opened */ | |
953 | pr_info("hv_netvsc channel opened successfully"); | |
954 | ||
955 | /* Connect with the NetVsp */ | |
956 | ret = netvsc_connect_vsp(device); | |
957 | if (ret != 0) { | |
958 | dev_err(&device->device, | |
959 | "unable to connect to NetVSP - %d", ret); | |
b637e023 HZ |
960 | goto close; |
961 | } | |
962 | ||
963 | return ret; | |
964 | ||
965 | close: | |
966 | /* Now, we can close the channel safely */ | |
967 | vmbus_close(device->channel); | |
968 | ||
969 | cleanup: | |
970 | ||
971 | if (net_device) { | |
972 | list_for_each_entry_safe(packet, pos, | |
973 | &net_device->recv_pkt_list, | |
974 | list_ent) { | |
975 | list_del(&packet->list_ent); | |
976 | kfree(packet); | |
977 | } | |
978 | ||
979 | release_outbound_net_device(device); | |
980 | release_inbound_net_device(device); | |
981 | ||
356c4657 | 982 | kfree(net_device); |
b637e023 HZ |
983 | } |
984 | ||
985 | return ret; | |
986 | } |