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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> |
e3fe0bb6 | 30 | #include "hv_api.h" |
645954c5 | 31 | #include "logging.h" |
af167ae9 | 32 | #include "netvsc.h" |
043efcc3 | 33 | #include "rndis_filter.h" |
314bf1d1 | 34 | #include "channel.h" |
fceaf24a HJ |
35 | |
36 | ||
454f18a9 | 37 | /* Globals */ |
85799a37 | 38 | static const char *driver_name = "netvsc"; |
fceaf24a | 39 | |
454f18a9 | 40 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
85799a37 | 41 | static const struct hv_guid netvsc_device_type = { |
caf26a31 GKH |
42 | .data = { |
43 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
44 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
45 | } | |
fceaf24a HJ |
46 | }; |
47 | ||
5a71ae30 | 48 | static void netvsc_channel_cb(void *context); |
21a80820 | 49 | |
5a71ae30 | 50 | static int netvsc_init_send_buf(struct hv_device *device); |
21a80820 | 51 | |
5a71ae30 | 52 | static int netvsc_init_recv_buf(struct hv_device *device); |
21a80820 | 53 | |
5a71ae30 | 54 | static int netvsc_destroy_send_buf(struct netvsc_device *net_device); |
21a80820 | 55 | |
5a71ae30 | 56 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device); |
21a80820 | 57 | |
5a71ae30 | 58 | static int netvsc_connect_vsp(struct hv_device *device); |
21a80820 | 59 | |
5a71ae30 | 60 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 61 | struct vmpacket_descriptor *packet); |
21a80820 | 62 | |
5a71ae30 | 63 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 64 | struct vmpacket_descriptor *packet); |
21a80820 | 65 | |
5a71ae30 | 66 | static void netvsc_send_recv_completion(struct hv_device *device, |
85799a37 | 67 | u64 transaction_id); |
21a80820 | 68 | |
fceaf24a | 69 | |
5a71ae30 | 70 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 71 | { |
85799a37 | 72 | struct netvsc_device *net_device; |
fceaf24a | 73 | |
85799a37 HZ |
74 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
75 | if (!net_device) | |
fceaf24a HJ |
76 | return NULL; |
77 | ||
454f18a9 | 78 | /* Set to 2 to allow both inbound and outbound traffic */ |
53d21fdb | 79 | atomic_cmpxchg(&net_device->refcnt, 0, 2); |
fceaf24a | 80 | |
53d21fdb | 81 | net_device->dev = device; |
ca623ad3 | 82 | device->ext = net_device; |
fceaf24a | 83 | |
85799a37 | 84 | return net_device; |
fceaf24a HJ |
85 | } |
86 | ||
5a71ae30 | 87 | static void free_net_device(struct netvsc_device *device) |
fceaf24a | 88 | { |
31acaa50 | 89 | WARN_ON(atomic_read(&device->refcnt) != 0); |
ca623ad3 | 90 | device->dev->ext = NULL; |
85799a37 | 91 | kfree(device); |
fceaf24a HJ |
92 | } |
93 | ||
94 | ||
454f18a9 | 95 | /* Get the net device object iff exists and its refcount > 1 */ |
5a71ae30 | 96 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 97 | { |
85799a37 | 98 | struct netvsc_device *net_device; |
fceaf24a | 99 | |
ca623ad3 | 100 | net_device = device->ext; |
53d21fdb HZ |
101 | if (net_device && atomic_read(&net_device->refcnt) > 1) |
102 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 103 | else |
85799a37 | 104 | net_device = NULL; |
fceaf24a | 105 | |
85799a37 | 106 | return net_device; |
fceaf24a HJ |
107 | } |
108 | ||
454f18a9 | 109 | /* Get the net device object iff exists and its refcount > 0 */ |
5a71ae30 | 110 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 111 | { |
85799a37 | 112 | struct netvsc_device *net_device; |
fceaf24a | 113 | |
ca623ad3 | 114 | net_device = device->ext; |
53d21fdb HZ |
115 | if (net_device && atomic_read(&net_device->refcnt)) |
116 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 117 | else |
85799a37 | 118 | net_device = NULL; |
fceaf24a | 119 | |
85799a37 | 120 | return net_device; |
fceaf24a HJ |
121 | } |
122 | ||
5a71ae30 | 123 | static void put_net_device(struct hv_device *device) |
fceaf24a | 124 | { |
85799a37 | 125 | struct netvsc_device *net_device; |
fceaf24a | 126 | |
ca623ad3 | 127 | net_device = device->ext; |
fceaf24a | 128 | |
53d21fdb | 129 | atomic_dec(&net_device->refcnt); |
fceaf24a HJ |
130 | } |
131 | ||
5a71ae30 HZ |
132 | static struct netvsc_device *release_outbound_net_device( |
133 | struct hv_device *device) | |
fceaf24a | 134 | { |
85799a37 | 135 | struct netvsc_device *net_device; |
fceaf24a | 136 | |
ca623ad3 | 137 | net_device = device->ext; |
85799a37 | 138 | if (net_device == NULL) |
fceaf24a HJ |
139 | return NULL; |
140 | ||
454f18a9 | 141 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
53d21fdb | 142 | while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2) |
b4362c9c | 143 | udelay(100); |
fceaf24a | 144 | |
85799a37 | 145 | return net_device; |
fceaf24a HJ |
146 | } |
147 | ||
5a71ae30 HZ |
148 | static struct netvsc_device *release_inbound_net_device( |
149 | struct hv_device *device) | |
fceaf24a | 150 | { |
85799a37 | 151 | struct netvsc_device *net_device; |
fceaf24a | 152 | |
ca623ad3 | 153 | net_device = device->ext; |
85799a37 | 154 | if (net_device == NULL) |
fceaf24a HJ |
155 | return NULL; |
156 | ||
454f18a9 | 157 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
53d21fdb | 158 | while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1) |
b4362c9c | 159 | udelay(100); |
fceaf24a | 160 | |
ca623ad3 | 161 | device->ext = NULL; |
85799a37 | 162 | return net_device; |
fceaf24a HJ |
163 | } |
164 | ||
5a71ae30 | 165 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 166 | { |
21a80820 | 167 | int ret = 0; |
85799a37 HZ |
168 | struct netvsc_device *net_device; |
169 | struct nvsp_message *init_packet; | |
fceaf24a | 170 | |
5a71ae30 | 171 | net_device = get_outbound_net_device(device); |
85799a37 | 172 | if (!net_device) { |
eb335bc4 | 173 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 174 | "device being destroyed?"); |
fceaf24a HJ |
175 | return -1; |
176 | } | |
fceaf24a | 177 | |
53d21fdb | 178 | net_device->recv_buf = |
df3493e0 S |
179 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
180 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 181 | if (!net_device->recv_buf) { |
eb335bc4 HJ |
182 | dev_err(&device->device, "unable to allocate receive " |
183 | "buffer of size %d", net_device->recv_buf_size); | |
fceaf24a | 184 | ret = -1; |
0c3b7b2f | 185 | goto cleanup; |
fceaf24a | 186 | } |
fceaf24a | 187 | |
454f18a9 BP |
188 | /* |
189 | * Establish the gpadl handle for this buffer on this | |
190 | * channel. Note: This call uses the vmbus connection rather | |
191 | * than the channel to establish the gpadl handle. | |
192 | */ | |
53d21fdb HZ |
193 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
194 | net_device->recv_buf_size, | |
195 | &net_device->recv_buf_gpadl_handle); | |
21a80820 | 196 | if (ret != 0) { |
eb335bc4 HJ |
197 | dev_err(&device->device, |
198 | "unable to establish receive buffer's gpadl"); | |
0c3b7b2f | 199 | goto cleanup; |
fceaf24a HJ |
200 | } |
201 | ||
fceaf24a | 202 | |
454f18a9 | 203 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 204 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 205 | |
85799a37 | 206 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 207 | |
53d21fdb HZ |
208 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
209 | init_packet->msg.v1_msg.send_recv_buf. | |
210 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
211 | init_packet->msg.v1_msg. | |
212 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 213 | |
454f18a9 | 214 | /* Send the gpadl notification request */ |
0c3b7b2f | 215 | net_device->wait_condition = 0; |
85799a37 | 216 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 217 | sizeof(struct nvsp_message), |
85799a37 | 218 | (unsigned long)init_packet, |
415f2287 | 219 | VM_PKT_DATA_INBAND, |
5a4df290 | 220 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 221 | if (ret != 0) { |
eb335bc4 HJ |
222 | dev_err(&device->device, |
223 | "unable to send receive buffer's gpadl to netvsp"); | |
0c3b7b2f | 224 | goto cleanup; |
fceaf24a HJ |
225 | } |
226 | ||
0c3b7b2f S |
227 | wait_event_timeout(net_device->channel_init_wait, |
228 | net_device->wait_condition, | |
229 | msecs_to_jiffies(1000)); | |
230 | BUG_ON(net_device->wait_condition == 0); | |
231 | ||
fceaf24a | 232 | |
454f18a9 | 233 | /* Check the response */ |
53d21fdb HZ |
234 | if (init_packet->msg.v1_msg. |
235 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
eb335bc4 | 236 | dev_err(&device->device, "Unable to complete receive buffer " |
21a80820 | 237 | "initialzation with NetVsp - status %d", |
53d21fdb HZ |
238 | init_packet->msg.v1_msg. |
239 | send_recv_buf_complete.status); | |
fceaf24a | 240 | ret = -1; |
0c3b7b2f | 241 | goto cleanup; |
fceaf24a HJ |
242 | } |
243 | ||
454f18a9 | 244 | /* Parse the response */ |
fceaf24a | 245 | |
53d21fdb HZ |
246 | net_device->recv_section_cnt = init_packet->msg. |
247 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 248 | |
53d21fdb | 249 | net_device->recv_section = kmalloc(net_device->recv_section_cnt |
85799a37 | 250 | * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
53d21fdb | 251 | if (net_device->recv_section == NULL) { |
fceaf24a | 252 | ret = -1; |
0c3b7b2f | 253 | goto cleanup; |
fceaf24a HJ |
254 | } |
255 | ||
53d21fdb HZ |
256 | memcpy(net_device->recv_section, |
257 | init_packet->msg.v1_msg. | |
258 | send_recv_buf_complete.sections, | |
259 | net_device->recv_section_cnt * | |
85799a37 | 260 | sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 261 | |
21a80820 GKH |
262 | /* |
263 | * For 1st release, there should only be 1 section that represents the | |
264 | * entire receive buffer | |
265 | */ | |
53d21fdb HZ |
266 | if (net_device->recv_section_cnt != 1 || |
267 | net_device->recv_section->offset != 0) { | |
fceaf24a | 268 | ret = -1; |
0c3b7b2f | 269 | goto cleanup; |
fceaf24a HJ |
270 | } |
271 | ||
0c3b7b2f | 272 | goto exit; |
fceaf24a | 273 | |
0c3b7b2f | 274 | cleanup: |
5a71ae30 | 275 | netvsc_destroy_recv_buf(net_device); |
fceaf24a | 276 | |
0c3b7b2f | 277 | exit: |
5a71ae30 | 278 | put_net_device(device); |
fceaf24a HJ |
279 | return ret; |
280 | } | |
281 | ||
5a71ae30 | 282 | static int netvsc_init_send_buf(struct hv_device *device) |
fceaf24a | 283 | { |
21a80820 | 284 | int ret = 0; |
85799a37 HZ |
285 | struct netvsc_device *net_device; |
286 | struct nvsp_message *init_packet; | |
fceaf24a | 287 | |
5a71ae30 | 288 | net_device = get_outbound_net_device(device); |
85799a37 | 289 | if (!net_device) { |
eb335bc4 | 290 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 291 | "device being destroyed?"); |
fceaf24a HJ |
292 | return -1; |
293 | } | |
53d21fdb | 294 | if (net_device->send_buf_size <= 0) { |
79069684 | 295 | ret = -EINVAL; |
0c3b7b2f | 296 | goto cleanup; |
79069684 BP |
297 | } |
298 | ||
53d21fdb | 299 | net_device->send_buf = |
df3493e0 S |
300 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
301 | get_order(net_device->send_buf_size)); | |
53d21fdb | 302 | if (!net_device->send_buf) { |
eb335bc4 HJ |
303 | dev_err(&device->device, "unable to allocate send " |
304 | "buffer of size %d", net_device->send_buf_size); | |
fceaf24a | 305 | ret = -1; |
0c3b7b2f | 306 | goto cleanup; |
fceaf24a | 307 | } |
fceaf24a | 308 | |
454f18a9 BP |
309 | /* |
310 | * Establish the gpadl handle for this buffer on this | |
311 | * channel. Note: This call uses the vmbus connection rather | |
312 | * than the channel to establish the gpadl handle. | |
313 | */ | |
53d21fdb HZ |
314 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, |
315 | net_device->send_buf_size, | |
316 | &net_device->send_buf_gpadl_handle); | |
21a80820 | 317 | if (ret != 0) { |
eb335bc4 | 318 | dev_err(&device->device, "unable to establish send buffer's gpadl"); |
0c3b7b2f | 319 | goto cleanup; |
fceaf24a HJ |
320 | } |
321 | ||
454f18a9 | 322 | /* Notify the NetVsp of the gpadl handle */ |
53d21fdb | 323 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 324 | |
85799a37 | 325 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 326 | |
53d21fdb HZ |
327 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; |
328 | init_packet->msg.v1_msg.send_recv_buf. | |
329 | gpadl_handle = net_device->send_buf_gpadl_handle; | |
330 | init_packet->msg.v1_msg.send_recv_buf.id = | |
85799a37 | 331 | NETVSC_SEND_BUFFER_ID; |
fceaf24a | 332 | |
454f18a9 | 333 | /* Send the gpadl notification request */ |
0c3b7b2f | 334 | net_device->wait_condition = 0; |
85799a37 | 335 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 336 | sizeof(struct nvsp_message), |
85799a37 | 337 | (unsigned long)init_packet, |
415f2287 | 338 | VM_PKT_DATA_INBAND, |
5a4df290 | 339 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 340 | if (ret != 0) { |
eb335bc4 | 341 | dev_err(&device->device, |
21a80820 | 342 | "unable to send receive buffer's gpadl to netvsp"); |
0c3b7b2f | 343 | goto cleanup; |
fceaf24a HJ |
344 | } |
345 | ||
0c3b7b2f S |
346 | wait_event_timeout(net_device->channel_init_wait, |
347 | net_device->wait_condition, | |
348 | msecs_to_jiffies(1000)); | |
349 | BUG_ON(net_device->wait_condition == 0); | |
fceaf24a | 350 | |
454f18a9 | 351 | /* Check the response */ |
53d21fdb HZ |
352 | if (init_packet->msg.v1_msg. |
353 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
eb335bc4 | 354 | dev_err(&device->device, "Unable to complete send buffer " |
21a80820 | 355 | "initialzation with NetVsp - status %d", |
53d21fdb HZ |
356 | init_packet->msg.v1_msg. |
357 | send_send_buf_complete.status); | |
fceaf24a | 358 | ret = -1; |
0c3b7b2f | 359 | goto cleanup; |
fceaf24a HJ |
360 | } |
361 | ||
53d21fdb HZ |
362 | net_device->send_section_size = init_packet-> |
363 | msg.v1_msg.send_send_buf_complete.section_size; | |
fceaf24a | 364 | |
0c3b7b2f | 365 | goto exit; |
fceaf24a | 366 | |
0c3b7b2f | 367 | cleanup: |
5a71ae30 | 368 | netvsc_destroy_send_buf(net_device); |
fceaf24a | 369 | |
0c3b7b2f | 370 | exit: |
5a71ae30 | 371 | put_net_device(device); |
fceaf24a HJ |
372 | return ret; |
373 | } | |
374 | ||
5a71ae30 | 375 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
fceaf24a | 376 | { |
85799a37 | 377 | struct nvsp_message *revoke_packet; |
21a80820 | 378 | int ret = 0; |
fceaf24a | 379 | |
454f18a9 BP |
380 | /* |
381 | * If we got a section count, it means we received a | |
382 | * SendReceiveBufferComplete msg (ie sent | |
383 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
384 | * to send a revoke msg here | |
385 | */ | |
53d21fdb | 386 | if (net_device->recv_section_cnt) { |
454f18a9 | 387 | /* Send the revoke receive buffer */ |
53d21fdb | 388 | revoke_packet = &net_device->revoke_packet; |
85799a37 | 389 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 390 | |
53d21fdb HZ |
391 | revoke_packet->hdr.msg_type = |
392 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
393 | revoke_packet->msg.v1_msg. | |
394 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 395 | |
53d21fdb | 396 | ret = vmbus_sendpacket(net_device->dev->channel, |
85799a37 | 397 | revoke_packet, |
5a4df290 | 398 | sizeof(struct nvsp_message), |
85799a37 | 399 | (unsigned long)revoke_packet, |
415f2287 | 400 | VM_PKT_DATA_INBAND, 0); |
454f18a9 BP |
401 | /* |
402 | * If we failed here, we might as well return and | |
403 | * have a leak rather than continue and a bugchk | |
404 | */ | |
21a80820 | 405 | if (ret != 0) { |
eb335bc4 HJ |
406 | dev_err(&net_device->dev->device, "unable to send " |
407 | "revoke receive buffer to netvsp"); | |
fceaf24a HJ |
408 | return -1; |
409 | } | |
410 | } | |
411 | ||
454f18a9 | 412 | /* Teardown the gpadl on the vsp end */ |
53d21fdb | 413 | if (net_device->recv_buf_gpadl_handle) { |
53d21fdb HZ |
414 | ret = vmbus_teardown_gpadl(net_device->dev->channel, |
415 | net_device->recv_buf_gpadl_handle); | |
fceaf24a | 416 | |
454f18a9 | 417 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
21a80820 | 418 | if (ret != 0) { |
eb335bc4 | 419 | dev_err(&net_device->dev->device, |
21a80820 | 420 | "unable to teardown receive buffer's gpadl"); |
fceaf24a HJ |
421 | return -1; |
422 | } | |
53d21fdb | 423 | net_device->recv_buf_gpadl_handle = 0; |
fceaf24a HJ |
424 | } |
425 | ||
53d21fdb | 426 | if (net_device->recv_buf) { |
454f18a9 | 427 | /* Free up the receive buffer */ |
df3493e0 S |
428 | free_pages((unsigned long)net_device->recv_buf, |
429 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 430 | net_device->recv_buf = NULL; |
fceaf24a HJ |
431 | } |
432 | ||
53d21fdb HZ |
433 | if (net_device->recv_section) { |
434 | net_device->recv_section_cnt = 0; | |
435 | kfree(net_device->recv_section); | |
436 | net_device->recv_section = NULL; | |
fceaf24a HJ |
437 | } |
438 | ||
fceaf24a HJ |
439 | return ret; |
440 | } | |
441 | ||
5a71ae30 | 442 | static int netvsc_destroy_send_buf(struct netvsc_device *net_device) |
fceaf24a | 443 | { |
85799a37 | 444 | struct nvsp_message *revoke_packet; |
21a80820 | 445 | int ret = 0; |
fceaf24a | 446 | |
454f18a9 BP |
447 | /* |
448 | * If we got a section count, it means we received a | |
449 | * SendReceiveBufferComplete msg (ie sent | |
450 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
451 | * to send a revoke msg here | |
452 | */ | |
53d21fdb | 453 | if (net_device->send_section_size) { |
454f18a9 | 454 | /* Send the revoke send buffer */ |
53d21fdb | 455 | revoke_packet = &net_device->revoke_packet; |
85799a37 | 456 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 457 | |
53d21fdb HZ |
458 | revoke_packet->hdr.msg_type = |
459 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
460 | revoke_packet->msg.v1_msg. | |
461 | revoke_send_buf.id = NETVSC_SEND_BUFFER_ID; | |
fceaf24a | 462 | |
53d21fdb | 463 | ret = vmbus_sendpacket(net_device->dev->channel, |
85799a37 | 464 | revoke_packet, |
5a4df290 | 465 | sizeof(struct nvsp_message), |
85799a37 | 466 | (unsigned long)revoke_packet, |
415f2287 | 467 | VM_PKT_DATA_INBAND, 0); |
21a80820 GKH |
468 | /* |
469 | * If we failed here, we might as well return and have a leak | |
470 | * rather than continue and a bugchk | |
471 | */ | |
472 | if (ret != 0) { | |
eb335bc4 HJ |
473 | dev_err(&net_device->dev->device, "unable to send " |
474 | "revoke send buffer to netvsp"); | |
fceaf24a HJ |
475 | return -1; |
476 | } | |
477 | } | |
478 | ||
454f18a9 | 479 | /* Teardown the gpadl on the vsp end */ |
53d21fdb | 480 | if (net_device->send_buf_gpadl_handle) { |
53d21fdb HZ |
481 | ret = vmbus_teardown_gpadl(net_device->dev->channel, |
482 | net_device->send_buf_gpadl_handle); | |
fceaf24a | 483 | |
21a80820 GKH |
484 | /* |
485 | * If we failed here, we might as well return and have a leak | |
486 | * rather than continue and a bugchk | |
487 | */ | |
488 | if (ret != 0) { | |
eb335bc4 HJ |
489 | dev_err(&net_device->dev->device, |
490 | "unable to teardown send buffer's gpadl"); | |
fceaf24a HJ |
491 | return -1; |
492 | } | |
53d21fdb | 493 | net_device->send_buf_gpadl_handle = 0; |
fceaf24a HJ |
494 | } |
495 | ||
53d21fdb | 496 | if (net_device->send_buf) { |
454f18a9 | 497 | /* Free up the receive buffer */ |
df3493e0 S |
498 | free_pages((unsigned long)net_device->send_buf, |
499 | get_order(net_device->send_buf_size)); | |
53d21fdb | 500 | net_device->send_buf = NULL; |
fceaf24a HJ |
501 | } |
502 | ||
fceaf24a HJ |
503 | return ret; |
504 | } | |
505 | ||
506 | ||
5a71ae30 | 507 | static int netvsc_connect_vsp(struct hv_device *device) |
fceaf24a | 508 | { |
21a80820 | 509 | int ret; |
85799a37 HZ |
510 | struct netvsc_device *net_device; |
511 | struct nvsp_message *init_packet; | |
512 | int ndis_version; | |
fceaf24a | 513 | |
5a71ae30 | 514 | net_device = get_outbound_net_device(device); |
85799a37 | 515 | if (!net_device) { |
eb335bc4 | 516 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 517 | "device being destroyed?"); |
fceaf24a HJ |
518 | return -1; |
519 | } | |
520 | ||
53d21fdb | 521 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 522 | |
85799a37 | 523 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
524 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
525 | init_packet->msg.init_msg.init.min_protocol_ver = | |
85799a37 | 526 | NVSP_MIN_PROTOCOL_VERSION; |
53d21fdb | 527 | init_packet->msg.init_msg.init.max_protocol_ver = |
85799a37 | 528 | NVSP_MAX_PROTOCOL_VERSION; |
fceaf24a | 529 | |
454f18a9 | 530 | /* Send the init request */ |
0c3b7b2f | 531 | net_device->wait_condition = 0; |
85799a37 | 532 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 533 | sizeof(struct nvsp_message), |
85799a37 | 534 | (unsigned long)init_packet, |
415f2287 | 535 | VM_PKT_DATA_INBAND, |
5a4df290 | 536 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 | 537 | |
b8a3d52b | 538 | if (ret != 0) |
0c3b7b2f | 539 | goto cleanup; |
fceaf24a | 540 | |
0c3b7b2f S |
541 | wait_event_timeout(net_device->channel_init_wait, |
542 | net_device->wait_condition, | |
543 | msecs_to_jiffies(1000)); | |
544 | if (net_device->wait_condition == 0) { | |
545 | ret = -ETIMEDOUT; | |
546 | goto cleanup; | |
547 | } | |
fceaf24a | 548 | |
53d21fdb HZ |
549 | if (init_packet->msg.init_msg.init_complete.status != |
550 | NVSP_STAT_SUCCESS) { | |
fceaf24a | 551 | ret = -1; |
0c3b7b2f | 552 | goto cleanup; |
fceaf24a HJ |
553 | } |
554 | ||
53d21fdb HZ |
555 | if (init_packet->msg.init_msg.init_complete. |
556 | negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { | |
fceaf24a | 557 | ret = -1; |
0c3b7b2f | 558 | goto cleanup; |
fceaf24a | 559 | } |
454f18a9 | 560 | /* Send the ndis version */ |
85799a37 | 561 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 562 | |
85799a37 | 563 | ndis_version = 0x00050000; |
fceaf24a | 564 | |
53d21fdb HZ |
565 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
566 | init_packet->msg.v1_msg. | |
567 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 568 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
569 | init_packet->msg.v1_msg. |
570 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 571 | ndis_version & 0xFFFF; |
fceaf24a | 572 | |
454f18a9 | 573 | /* Send the init request */ |
85799a37 | 574 | ret = vmbus_sendpacket(device->channel, init_packet, |
0c3b7b2f S |
575 | sizeof(struct nvsp_message), |
576 | (unsigned long)init_packet, | |
577 | VM_PKT_DATA_INBAND, 0); | |
21a80820 | 578 | if (ret != 0) { |
fceaf24a | 579 | ret = -1; |
0c3b7b2f | 580 | goto cleanup; |
fceaf24a | 581 | } |
454f18a9 BP |
582 | |
583 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 584 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 585 | if (ret == 0) |
5a71ae30 | 586 | ret = netvsc_init_send_buf(device); |
fceaf24a | 587 | |
0c3b7b2f | 588 | cleanup: |
5a71ae30 | 589 | put_net_device(device); |
fceaf24a HJ |
590 | return ret; |
591 | } | |
592 | ||
85799a37 | 593 | static void NetVscDisconnectFromVsp(struct netvsc_device *net_device) |
fceaf24a | 594 | { |
5a71ae30 HZ |
595 | netvsc_destroy_recv_buf(net_device); |
596 | netvsc_destroy_send_buf(net_device); | |
fceaf24a HJ |
597 | } |
598 | ||
3e189519 | 599 | /* |
5a71ae30 HZ |
600 | * netvsc_device_add - Callback when the device belonging to this |
601 | * driver is added | |
21a80820 | 602 | */ |
5a71ae30 | 603 | static int netvsc_device_add(struct hv_device *device, void *additional_info) |
fceaf24a | 604 | { |
21a80820 | 605 | int ret = 0; |
fceaf24a | 606 | int i; |
85799a37 | 607 | struct netvsc_device *net_device; |
d29274ef | 608 | struct hv_netvsc_packet *packet, *pos; |
85799a37 | 609 | struct netvsc_driver *net_driver = |
ca623ad3 | 610 | (struct netvsc_driver *)device->drv; |
fceaf24a | 611 | |
5a71ae30 | 612 | net_device = alloc_net_device(device); |
85799a37 | 613 | if (!net_device) { |
fceaf24a | 614 | ret = -1; |
0c3b7b2f | 615 | goto cleanup; |
fceaf24a HJ |
616 | } |
617 | ||
454f18a9 | 618 | /* Initialize the NetVSC channel extension */ |
53d21fdb HZ |
619 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; |
620 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
fceaf24a | 621 | |
53d21fdb | 622 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
fceaf24a | 623 | |
53d21fdb | 624 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
fceaf24a | 625 | |
21a80820 GKH |
626 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { |
627 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
628 | (NETVSC_RECEIVE_SG_COUNT * | |
629 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
b8a3d52b | 630 | if (!packet) |
fceaf24a | 631 | break; |
b8a3d52b | 632 | |
72a2f5bd | 633 | list_add_tail(&packet->list_ent, |
53d21fdb | 634 | &net_device->recv_pkt_list); |
fceaf24a | 635 | } |
0c3b7b2f | 636 | init_waitqueue_head(&net_device->channel_init_wait); |
fceaf24a | 637 | |
454f18a9 | 638 | /* Open the channel */ |
72a2f5bd HZ |
639 | ret = vmbus_open(device->channel, net_driver->ring_buf_size, |
640 | net_driver->ring_buf_size, NULL, 0, | |
5a71ae30 | 641 | netvsc_channel_cb, device); |
fceaf24a | 642 | |
21a80820 | 643 | if (ret != 0) { |
eb335bc4 | 644 | dev_err(&device->device, "unable to open channel: %d", ret); |
fceaf24a | 645 | ret = -1; |
0c3b7b2f | 646 | goto cleanup; |
fceaf24a HJ |
647 | } |
648 | ||
454f18a9 | 649 | /* Channel is opened */ |
eb335bc4 | 650 | pr_info("hv_netvsc channel opened successfully"); |
fceaf24a | 651 | |
454f18a9 | 652 | /* Connect with the NetVsp */ |
5a71ae30 | 653 | ret = netvsc_connect_vsp(device); |
21a80820 | 654 | if (ret != 0) { |
eb335bc4 HJ |
655 | dev_err(&device->device, |
656 | "unable to connect to NetVSP - %d", ret); | |
fceaf24a | 657 | ret = -1; |
1fb9dff0 | 658 | goto close; |
fceaf24a HJ |
659 | } |
660 | ||
fceaf24a HJ |
661 | return ret; |
662 | ||
1fb9dff0 | 663 | close: |
454f18a9 | 664 | /* Now, we can close the channel safely */ |
85799a37 | 665 | vmbus_close(device->channel); |
fceaf24a | 666 | |
0c3b7b2f | 667 | cleanup: |
fceaf24a | 668 | |
85799a37 | 669 | if (net_device) { |
d29274ef | 670 | list_for_each_entry_safe(packet, pos, |
53d21fdb | 671 | &net_device->recv_pkt_list, |
72a2f5bd HZ |
672 | list_ent) { |
673 | list_del(&packet->list_ent); | |
8c69f52a | 674 | kfree(packet); |
fceaf24a HJ |
675 | } |
676 | ||
5a71ae30 HZ |
677 | release_outbound_net_device(device); |
678 | release_inbound_net_device(device); | |
fceaf24a | 679 | |
5a71ae30 | 680 | free_net_device(net_device); |
fceaf24a HJ |
681 | } |
682 | ||
fceaf24a HJ |
683 | return ret; |
684 | } | |
685 | ||
3e189519 | 686 | /* |
5a71ae30 | 687 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 688 | */ |
5a71ae30 | 689 | static int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 690 | { |
85799a37 HZ |
691 | struct netvsc_device *net_device; |
692 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
fceaf24a | 693 | |
454f18a9 | 694 | /* Stop outbound traffic ie sends and receives completions */ |
5a71ae30 | 695 | net_device = release_outbound_net_device(device); |
85799a37 | 696 | if (!net_device) { |
eb335bc4 | 697 | dev_err(&device->device, "No net device present!!"); |
fceaf24a HJ |
698 | return -1; |
699 | } | |
700 | ||
454f18a9 | 701 | /* Wait for all send completions */ |
53d21fdb | 702 | while (atomic_read(&net_device->num_outstanding_sends)) { |
eb335bc4 HJ |
703 | dev_err(&device->device, |
704 | "waiting for %d requests to complete...", | |
705 | atomic_read(&net_device->num_outstanding_sends)); | |
b4362c9c | 706 | udelay(100); |
fceaf24a HJ |
707 | } |
708 | ||
85799a37 | 709 | NetVscDisconnectFromVsp(net_device); |
fceaf24a | 710 | |
454f18a9 | 711 | /* Stop inbound traffic ie receives and sends completions */ |
5a71ae30 | 712 | net_device = release_inbound_net_device(device); |
fceaf24a | 713 | |
454f18a9 | 714 | /* At this point, no one should be accessing netDevice except in here */ |
eb335bc4 | 715 | dev_notice(&device->device, "net device safe to remove"); |
fceaf24a | 716 | |
454f18a9 | 717 | /* Now, we can close the channel safely */ |
85799a37 | 718 | vmbus_close(device->channel); |
fceaf24a | 719 | |
454f18a9 | 720 | /* Release all resources */ |
85799a37 | 721 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 722 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 723 | list_del(&netvsc_packet->list_ent); |
85799a37 | 724 | kfree(netvsc_packet); |
fceaf24a HJ |
725 | } |
726 | ||
5a71ae30 | 727 | free_net_device(net_device); |
21a80820 | 728 | return 0; |
fceaf24a HJ |
729 | } |
730 | ||
3e189519 | 731 | /* |
5a71ae30 | 732 | * netvsc_cleanup - Perform any cleanup when the driver is removed |
21a80820 | 733 | */ |
5a71ae30 | 734 | static void netvsc_cleanup(struct hv_driver *drv) |
fceaf24a | 735 | { |
fceaf24a HJ |
736 | } |
737 | ||
5a71ae30 | 738 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 739 | struct vmpacket_descriptor *packet) |
fceaf24a | 740 | { |
85799a37 HZ |
741 | struct netvsc_device *net_device; |
742 | struct nvsp_message *nvsp_packet; | |
743 | struct hv_netvsc_packet *nvsc_packet; | |
fceaf24a | 744 | |
5a71ae30 | 745 | net_device = get_inbound_net_device(device); |
85799a37 | 746 | if (!net_device) { |
eb335bc4 | 747 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 748 | "device being destroyed?"); |
fceaf24a HJ |
749 | return; |
750 | } | |
751 | ||
85799a37 | 752 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 753 | (packet->offset8 << 3)); |
fceaf24a | 754 | |
53d21fdb HZ |
755 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
756 | (nvsp_packet->hdr.msg_type == | |
757 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
758 | (nvsp_packet->hdr.msg_type == | |
759 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 760 | /* Copy the response back */ |
53d21fdb | 761 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 762 | sizeof(struct nvsp_message)); |
0c3b7b2f S |
763 | net_device->wait_condition = 1; |
764 | wake_up(&net_device->channel_init_wait); | |
53d21fdb HZ |
765 | } else if (nvsp_packet->hdr.msg_type == |
766 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
454f18a9 | 767 | /* Get the send context */ |
85799a37 | 768 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 769 | packet->trans_id; |
fceaf24a | 770 | |
454f18a9 | 771 | /* Notify the layer above us */ |
72a2f5bd HZ |
772 | nvsc_packet->completion.send.send_completion( |
773 | nvsc_packet->completion.send.send_completion_ctx); | |
fceaf24a | 774 | |
53d21fdb | 775 | atomic_dec(&net_device->num_outstanding_sends); |
21a80820 | 776 | } else { |
eb335bc4 | 777 | dev_err(&device->device, "Unknown send completion packet type- " |
53d21fdb | 778 | "%d received!!", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
779 | } |
780 | ||
5a71ae30 | 781 | put_net_device(device); |
fceaf24a HJ |
782 | } |
783 | ||
5a71ae30 | 784 | static int netvsc_send(struct hv_device *device, |
85799a37 | 785 | struct hv_netvsc_packet *packet) |
fceaf24a | 786 | { |
85799a37 | 787 | struct netvsc_device *net_device; |
21a80820 | 788 | int ret = 0; |
fceaf24a | 789 | |
223c1aa6 | 790 | struct nvsp_message sendMessage; |
fceaf24a | 791 | |
5a71ae30 | 792 | net_device = get_outbound_net_device(device); |
85799a37 | 793 | if (!net_device) { |
eb335bc4 | 794 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 795 | "ignoring outbound packets", net_device); |
fceaf24a HJ |
796 | return -2; |
797 | } | |
798 | ||
53d21fdb | 799 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 800 | if (packet->is_data_pkt) { |
21a80820 | 801 | /* 0 is RMC_DATA; */ |
53d21fdb | 802 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
803 | } else { |
804 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 805 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 806 | } |
fceaf24a | 807 | |
454f18a9 | 808 | /* Not using send buffer section */ |
53d21fdb HZ |
809 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
810 | 0xFFFFFFFF; | |
811 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 812 | |
72a2f5bd | 813 | if (packet->page_buf_cnt) { |
85799a37 | 814 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
815 | packet->page_buf, |
816 | packet->page_buf_cnt, | |
ff3f8eec GKH |
817 | &sendMessage, |
818 | sizeof(struct nvsp_message), | |
85799a37 | 819 | (unsigned long)packet); |
21a80820 | 820 | } else { |
85799a37 | 821 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
5a4df290 | 822 | sizeof(struct nvsp_message), |
85799a37 | 823 | (unsigned long)packet, |
415f2287 | 824 | VM_PKT_DATA_INBAND, |
5a4df290 | 825 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
fceaf24a HJ |
826 | |
827 | } | |
828 | ||
829 | if (ret != 0) | |
eb335bc4 | 830 | dev_err(&device->device, "Unable to send packet %p ret %d", |
85799a37 | 831 | packet, ret); |
fceaf24a | 832 | |
53d21fdb | 833 | atomic_inc(&net_device->num_outstanding_sends); |
5a71ae30 | 834 | put_net_device(device); |
fceaf24a HJ |
835 | return ret; |
836 | } | |
837 | ||
57991156 HZ |
838 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
839 | static void netvsc_receive_completion(void *context) | |
840 | { | |
841 | struct hv_netvsc_packet *packet = context; | |
842 | struct hv_device *device = (struct hv_device *)packet->device; | |
843 | struct netvsc_device *net_device; | |
844 | u64 transaction_id = 0; | |
845 | bool fsend_receive_comp = false; | |
846 | unsigned long flags; | |
847 | ||
848 | /* | |
849 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
850 | * send out receive completion, we are using GetInboundNetDevice() | |
851 | * since we may have disable outbound traffic already. | |
852 | */ | |
853 | net_device = get_inbound_net_device(device); | |
854 | if (!net_device) { | |
855 | dev_err(&device->device, "unable to get net device..." | |
856 | "device being destroyed?"); | |
857 | return; | |
858 | } | |
859 | ||
860 | /* Overloading use of the lock. */ | |
861 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); | |
862 | ||
863 | packet->xfer_page_pkt->count--; | |
864 | ||
865 | /* | |
866 | * Last one in the line that represent 1 xfer page packet. | |
867 | * Return the xfer page packet itself to the freelist | |
868 | */ | |
869 | if (packet->xfer_page_pkt->count == 0) { | |
870 | fsend_receive_comp = true; | |
871 | transaction_id = packet->completion.recv.recv_completion_tid; | |
872 | list_add_tail(&packet->xfer_page_pkt->list_ent, | |
873 | &net_device->recv_pkt_list); | |
874 | ||
875 | } | |
876 | ||
877 | /* Put the packet back */ | |
878 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); | |
879 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
880 | ||
881 | /* Send a receive completion for the xfer page packet */ | |
882 | if (fsend_receive_comp) | |
883 | netvsc_send_recv_completion(device, transaction_id); | |
884 | ||
885 | put_net_device(device); | |
886 | } | |
887 | ||
5a71ae30 | 888 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 889 | struct vmpacket_descriptor *packet) |
fceaf24a | 890 | { |
85799a37 HZ |
891 | struct netvsc_device *net_device; |
892 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
893 | struct nvsp_message *nvsp_packet; | |
894 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
c4b0bc94 | 895 | unsigned long start; |
85799a37 | 896 | unsigned long end, end_virtual; |
7e23a6e9 | 897 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 898 | struct xferpage_packet *xferpage_packet = NULL; |
21a80820 | 899 | int i, j; |
85799a37 | 900 | int count = 0, bytes_remain = 0; |
6436873a | 901 | unsigned long flags; |
d29274ef | 902 | LIST_HEAD(listHead); |
fceaf24a | 903 | |
5a71ae30 | 904 | net_device = get_inbound_net_device(device); |
85799a37 | 905 | if (!net_device) { |
eb335bc4 | 906 | dev_err(&device->device, "unable to get net device..." |
21a80820 | 907 | "device being destroyed?"); |
fceaf24a HJ |
908 | return; |
909 | } | |
910 | ||
21a80820 GKH |
911 | /* |
912 | * All inbound packets other than send completion should be xfer page | |
913 | * packet | |
914 | */ | |
415f2287 | 915 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
eb335bc4 | 916 | dev_err(&device->device, "Unknown packet type received - %d", |
415f2287 | 917 | packet->type); |
5a71ae30 | 918 | put_net_device(device); |
fceaf24a HJ |
919 | return; |
920 | } | |
921 | ||
85799a37 | 922 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 923 | (packet->offset8 << 3)); |
fceaf24a | 924 | |
454f18a9 | 925 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
926 | if (nvsp_packet->hdr.msg_type != |
927 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
eb335bc4 HJ |
928 | dev_err(&device->device, "Unknown nvsp packet type received-" |
929 | " %d", nvsp_packet->hdr.msg_type); | |
5a71ae30 | 930 | put_net_device(device); |
fceaf24a HJ |
931 | return; |
932 | } | |
933 | ||
85799a37 | 934 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 935 | |
415f2287 | 936 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
eb335bc4 | 937 | dev_err(&device->device, "Invalid xfer page set id - " |
21a80820 | 938 | "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, |
415f2287 | 939 | vmxferpage_packet->xfer_pageset_id); |
5a71ae30 | 940 | put_net_device(device); |
fceaf24a HJ |
941 | return; |
942 | } | |
943 | ||
454f18a9 BP |
944 | /* |
945 | * Grab free packets (range count + 1) to represent this xfer | |
946 | * page packet. +1 to represent the xfer page packet itself. | |
947 | * We grab it here so that we know exactly how many we can | |
948 | * fulfil | |
949 | */ | |
53d21fdb HZ |
950 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
951 | while (!list_empty(&net_device->recv_pkt_list)) { | |
952 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 953 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
954 | break; |
955 | } | |
53d21fdb | 956 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 957 | |
454f18a9 BP |
958 | /* |
959 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
960 | * page and at least 1 for the range) i.e. we can handled | |
961 | * some of the xfer page packet ranges... | |
962 | */ | |
21a80820 | 963 | if (count < 2) { |
eb335bc4 HJ |
964 | dev_err(&device->device, "Got only %d netvsc pkt...needed " |
965 | "%d pkts. Dropping this xfer page packet completely!", | |
966 | count, vmxferpage_packet->range_cnt + 1); | |
fceaf24a | 967 | |
454f18a9 | 968 | /* Return it to the freelist */ |
53d21fdb | 969 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 970 | for (i = count; i != 0; i--) { |
92ec0893 | 971 | list_move_tail(listHead.next, |
53d21fdb | 972 | &net_device->recv_pkt_list); |
fceaf24a | 973 | } |
53d21fdb | 974 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 975 | flags); |
fceaf24a | 976 | |
5a71ae30 | 977 | netvsc_send_recv_completion(device, |
415f2287 | 978 | vmxferpage_packet->d.trans_id); |
fceaf24a | 979 | |
5a71ae30 | 980 | put_net_device(device); |
fceaf24a HJ |
981 | return; |
982 | } | |
983 | ||
454f18a9 | 984 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 985 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 986 | list_del(&xferpage_packet->list_ent); |
d29274ef | 987 | |
21a80820 | 988 | /* This is how much we can satisfy */ |
72a2f5bd | 989 | xferpage_packet->count = count - 1; |
21a80820 | 990 | |
415f2287 | 991 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
eb335bc4 HJ |
992 | dev_err(&device->device, "Needed %d netvsc pkts to satisy " |
993 | "this xfer page...got %d", | |
994 | vmxferpage_packet->range_cnt, xferpage_packet->count); | |
fceaf24a HJ |
995 | } |
996 | ||
454f18a9 | 997 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 998 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 999 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 1000 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 1001 | |
454f18a9 | 1002 | /* Initialize the netvsc packet */ |
72a2f5bd HZ |
1003 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
1004 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 1005 | netvsc_receive_completion; |
72a2f5bd | 1006 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 1007 | netvsc_packet; |
72a2f5bd | 1008 | netvsc_packet->device = device; |
21a80820 | 1009 | /* Save this so that we can send it back */ |
72a2f5bd | 1010 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 1011 | vmxferpage_packet->d.trans_id; |
fceaf24a | 1012 | |
72a2f5bd | 1013 | netvsc_packet->total_data_buflen = |
415f2287 | 1014 | vmxferpage_packet->ranges[i].byte_count; |
72a2f5bd | 1015 | netvsc_packet->page_buf_cnt = 1; |
fceaf24a | 1016 | |
ca623ad3 | 1017 | netvsc_packet->page_buf[0].len = |
415f2287 | 1018 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1019 | |
85799a37 | 1020 | start = virt_to_phys((void *)((unsigned long)net_device-> |
415f2287 | 1021 | recv_buf + vmxferpage_packet->ranges[i].byte_offset)); |
fceaf24a | 1022 | |
ca623ad3 | 1023 | netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT; |
53d21fdb | 1024 | end_virtual = (unsigned long)net_device->recv_buf |
415f2287 HZ |
1025 | + vmxferpage_packet->ranges[i].byte_offset |
1026 | + vmxferpage_packet->ranges[i].byte_count - 1; | |
85799a37 | 1027 | end = virt_to_phys((void *)end_virtual); |
fceaf24a | 1028 | |
454f18a9 | 1029 | /* Calculate the page relative offset */ |
ca623ad3 | 1030 | netvsc_packet->page_buf[0].offset = |
415f2287 | 1031 | vmxferpage_packet->ranges[i].byte_offset & |
85799a37 | 1032 | (PAGE_SIZE - 1); |
21a80820 GKH |
1033 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { |
1034 | /* Handle frame across multiple pages: */ | |
ca623ad3 HZ |
1035 | netvsc_packet->page_buf[0].len = |
1036 | (netvsc_packet->page_buf[0].pfn << | |
85799a37 | 1037 | PAGE_SHIFT) |
21a80820 | 1038 | + PAGE_SIZE - start; |
72a2f5bd | 1039 | bytes_remain = netvsc_packet->total_data_buflen - |
ca623ad3 | 1040 | netvsc_packet->page_buf[0].len; |
21a80820 | 1041 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { |
ca623ad3 | 1042 | netvsc_packet->page_buf[j].offset = 0; |
85799a37 | 1043 | if (bytes_remain <= PAGE_SIZE) { |
ca623ad3 | 1044 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
1045 | bytes_remain; |
1046 | bytes_remain = 0; | |
21a80820 | 1047 | } else { |
ca623ad3 | 1048 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
1049 | PAGE_SIZE; |
1050 | bytes_remain -= PAGE_SIZE; | |
21a80820 | 1051 | } |
ca623ad3 | 1052 | netvsc_packet->page_buf[j].pfn = |
85799a37 HZ |
1053 | virt_to_phys((void *)(end_virtual - |
1054 | bytes_remain)) >> PAGE_SHIFT; | |
72a2f5bd | 1055 | netvsc_packet->page_buf_cnt++; |
85799a37 | 1056 | if (bytes_remain == 0) |
21a80820 | 1057 | break; |
fceaf24a | 1058 | } |
fceaf24a | 1059 | } |
fceaf24a | 1060 | |
454f18a9 | 1061 | /* Pass it to the upper layer */ |
ca623ad3 | 1062 | ((struct netvsc_driver *)device->drv)-> |
72a2f5bd | 1063 | recv_cb(device, netvsc_packet); |
fceaf24a | 1064 | |
5a71ae30 | 1065 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 1066 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
1067 | } |
1068 | ||
5a71ae30 | 1069 | put_net_device(device); |
fceaf24a HJ |
1070 | } |
1071 | ||
5a71ae30 | 1072 | static void netvsc_send_recv_completion(struct hv_device *device, |
85799a37 | 1073 | u64 transaction_id) |
fceaf24a | 1074 | { |
223c1aa6 | 1075 | struct nvsp_message recvcompMessage; |
21a80820 GKH |
1076 | int retries = 0; |
1077 | int ret; | |
fceaf24a | 1078 | |
53d21fdb HZ |
1079 | recvcompMessage.hdr.msg_type = |
1080 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
fceaf24a | 1081 | |
454f18a9 | 1082 | /* FIXME: Pass in the status */ |
53d21fdb HZ |
1083 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = |
1084 | NVSP_STAT_SUCCESS; | |
fceaf24a HJ |
1085 | |
1086 | retry_send_cmplt: | |
454f18a9 | 1087 | /* Send the completion */ |
85799a37 HZ |
1088 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, |
1089 | sizeof(struct nvsp_message), transaction_id, | |
415f2287 | 1090 | VM_PKT_COMP, 0); |
21a80820 GKH |
1091 | if (ret == 0) { |
1092 | /* success */ | |
454f18a9 | 1093 | /* no-op */ |
21a80820 GKH |
1094 | } else if (ret == -1) { |
1095 | /* no more room...wait a bit and attempt to retry 3 times */ | |
fceaf24a | 1096 | retries++; |
eb335bc4 HJ |
1097 | dev_err(&device->device, "unable to send receive completion pkt" |
1098 | " (tid %llx)...retrying %d", transaction_id, retries); | |
fceaf24a | 1099 | |
21a80820 | 1100 | if (retries < 4) { |
b4362c9c | 1101 | udelay(100); |
fceaf24a | 1102 | goto retry_send_cmplt; |
21a80820 | 1103 | } else { |
eb335bc4 HJ |
1104 | dev_err(&device->device, "unable to send receive " |
1105 | "completion pkt (tid %llx)...give up retrying", | |
1106 | transaction_id); | |
fceaf24a | 1107 | } |
21a80820 | 1108 | } else { |
eb335bc4 HJ |
1109 | dev_err(&device->device, "unable to send receive " |
1110 | "completion pkt - %llx", transaction_id); | |
fceaf24a HJ |
1111 | } |
1112 | } | |
1113 | ||
5a71ae30 | 1114 | static void netvsc_channel_cb(void *context) |
fceaf24a | 1115 | { |
21a80820 | 1116 | int ret; |
85799a37 HZ |
1117 | struct hv_device *device = context; |
1118 | struct netvsc_device *net_device; | |
1119 | u32 bytes_recvd; | |
1120 | u64 request_id; | |
c6fcf0ba | 1121 | unsigned char *packet; |
8dc0a06a | 1122 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1123 | unsigned char *buffer; |
1124 | int bufferlen = NETVSC_PACKET_SIZE; | |
fceaf24a | 1125 | |
c6fcf0ba | 1126 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 1127 | GFP_ATOMIC); |
c6fcf0ba BP |
1128 | if (!packet) |
1129 | return; | |
1130 | buffer = packet; | |
1131 | ||
5a71ae30 | 1132 | net_device = get_inbound_net_device(device); |
85799a37 | 1133 | if (!net_device) { |
eb335bc4 | 1134 | dev_err(&device->device, "net device (%p) shutting down..." |
85799a37 | 1135 | "ignoring inbound packets", net_device); |
c6fcf0ba | 1136 | goto out; |
fceaf24a HJ |
1137 | } |
1138 | ||
21a80820 | 1139 | do { |
9f630068 | 1140 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 1141 | &bytes_recvd, &request_id); |
21a80820 | 1142 | if (ret == 0) { |
85799a37 | 1143 | if (bytes_recvd > 0) { |
21a80820 | 1144 | desc = (struct vmpacket_descriptor *)buffer; |
415f2287 HZ |
1145 | switch (desc->type) { |
1146 | case VM_PKT_COMP: | |
5a71ae30 | 1147 | netvsc_send_completion(device, desc); |
21a80820 GKH |
1148 | break; |
1149 | ||
415f2287 | 1150 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 1151 | netvsc_receive(device, desc); |
21a80820 GKH |
1152 | break; |
1153 | ||
1154 | default: | |
eb335bc4 | 1155 | dev_err(&device->device, |
21a80820 GKH |
1156 | "unhandled packet type %d, " |
1157 | "tid %llx len %d\n", | |
415f2287 | 1158 | desc->type, request_id, |
85799a37 | 1159 | bytes_recvd); |
21a80820 | 1160 | break; |
fceaf24a HJ |
1161 | } |
1162 | ||
454f18a9 | 1163 | /* reset */ |
c6fcf0ba | 1164 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 1165 | kfree(buffer); |
fceaf24a | 1166 | buffer = packet; |
c6fcf0ba | 1167 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a | 1168 | } |
21a80820 | 1169 | } else { |
454f18a9 | 1170 | /* reset */ |
c6fcf0ba | 1171 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 1172 | kfree(buffer); |
fceaf24a | 1173 | buffer = packet; |
c6fcf0ba | 1174 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
1175 | } |
1176 | ||
1177 | break; | |
1178 | } | |
21a80820 GKH |
1179 | } else if (ret == -2) { |
1180 | /* Handle large packet */ | |
85799a37 | 1181 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1182 | if (buffer == NULL) { |
454f18a9 | 1183 | /* Try again next time around */ |
eb335bc4 | 1184 | dev_err(&device->device, |
21a80820 | 1185 | "unable to allocate buffer of size " |
85799a37 | 1186 | "(%d)!!", bytes_recvd); |
fceaf24a HJ |
1187 | break; |
1188 | } | |
1189 | ||
85799a37 | 1190 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1191 | } |
1192 | } while (1); | |
1193 | ||
5a71ae30 | 1194 | put_net_device(device); |
c6fcf0ba BP |
1195 | out: |
1196 | kfree(buffer); | |
fceaf24a HJ |
1197 | return; |
1198 | } | |
af24ce42 HZ |
1199 | |
1200 | /* | |
1201 | * netvsc_initialize - Main entry point | |
1202 | */ | |
1203 | int netvsc_initialize(struct hv_driver *drv) | |
1204 | { | |
1205 | struct netvsc_driver *driver = (struct netvsc_driver *)drv; | |
1206 | ||
1207 | drv->name = driver_name; | |
1208 | memcpy(&drv->dev_type, &netvsc_device_type, sizeof(struct hv_guid)); | |
1209 | ||
1210 | /* Setup the dispatch table */ | |
1211 | driver->base.dev_add = netvsc_device_add; | |
1212 | driver->base.dev_rm = netvsc_device_remove; | |
1213 | driver->base.cleanup = netvsc_cleanup; | |
1214 | ||
1215 | driver->send = netvsc_send; | |
1216 | ||
1217 | rndis_filter_init(driver); | |
1218 | return 0; | |
1219 | } |