Commit | Line | Data |
---|---|---|
fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
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 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
0ffa63b0 | 22 | #include <linux/mm.h> |
b4362c9c | 23 | #include <linux/delay.h> |
21a80820 | 24 | #include <linux/io.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
4983b39a | 26 | #include "osd.h" |
645954c5 | 27 | #include "logging.h" |
af167ae9 | 28 | #include "netvsc.h" |
043efcc3 | 29 | #include "rndis_filter.h" |
314bf1d1 | 30 | #include "channel.h" |
fceaf24a HJ |
31 | |
32 | ||
454f18a9 | 33 | /* Globals */ |
85799a37 | 34 | static const char *driver_name = "netvsc"; |
fceaf24a | 35 | |
454f18a9 | 36 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
85799a37 | 37 | static const struct hv_guid netvsc_device_type = { |
caf26a31 GKH |
38 | .data = { |
39 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
40 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
41 | } | |
fceaf24a HJ |
42 | }; |
43 | ||
5a71ae30 | 44 | static int netvsc_device_add(struct hv_device *device, void *additional_info); |
21a80820 | 45 | |
5a71ae30 | 46 | static int netvsc_device_remove(struct hv_device *device); |
21a80820 | 47 | |
5a71ae30 | 48 | static void netvsc_cleanup(struct hv_driver *driver); |
21a80820 | 49 | |
5a71ae30 | 50 | static void netvsc_channel_cb(void *context); |
21a80820 | 51 | |
5a71ae30 | 52 | static int netvsc_init_send_buf(struct hv_device *device); |
21a80820 | 53 | |
5a71ae30 | 54 | static int netvsc_init_recv_buf(struct hv_device *device); |
21a80820 | 55 | |
5a71ae30 | 56 | static int netvsc_destroy_send_buf(struct netvsc_device *net_device); |
21a80820 | 57 | |
5a71ae30 | 58 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device); |
21a80820 | 59 | |
5a71ae30 | 60 | static int netvsc_connect_vsp(struct hv_device *device); |
21a80820 | 61 | |
5a71ae30 | 62 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 63 | struct vmpacket_descriptor *packet); |
21a80820 | 64 | |
5a71ae30 | 65 | static int netvsc_send(struct hv_device *device, |
85799a37 | 66 | struct hv_netvsc_packet *packet); |
21a80820 | 67 | |
5a71ae30 | 68 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 69 | struct vmpacket_descriptor *packet); |
21a80820 | 70 | |
5a71ae30 | 71 | static void netvsc_receive_completion(void *context); |
21a80820 | 72 | |
5a71ae30 | 73 | static void netvsc_send_recv_completion(struct hv_device *device, |
85799a37 | 74 | u64 transaction_id); |
21a80820 | 75 | |
fceaf24a | 76 | |
5a71ae30 | 77 | static struct netvsc_device *alloc_net_device(struct hv_device *device) |
fceaf24a | 78 | { |
85799a37 | 79 | struct netvsc_device *net_device; |
fceaf24a | 80 | |
85799a37 HZ |
81 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
82 | if (!net_device) | |
fceaf24a HJ |
83 | return NULL; |
84 | ||
454f18a9 | 85 | /* Set to 2 to allow both inbound and outbound traffic */ |
53d21fdb | 86 | atomic_cmpxchg(&net_device->refcnt, 0, 2); |
fceaf24a | 87 | |
53d21fdb | 88 | net_device->dev = device; |
ca623ad3 | 89 | device->ext = net_device; |
fceaf24a | 90 | |
85799a37 | 91 | return net_device; |
fceaf24a HJ |
92 | } |
93 | ||
5a71ae30 | 94 | static void free_net_device(struct netvsc_device *device) |
fceaf24a | 95 | { |
53d21fdb | 96 | WARN_ON(atomic_read(&device->refcnt) == 0); |
ca623ad3 | 97 | device->dev->ext = NULL; |
85799a37 | 98 | kfree(device); |
fceaf24a HJ |
99 | } |
100 | ||
101 | ||
454f18a9 | 102 | /* Get the net device object iff exists and its refcount > 1 */ |
5a71ae30 | 103 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
fceaf24a | 104 | { |
85799a37 | 105 | struct netvsc_device *net_device; |
fceaf24a | 106 | |
ca623ad3 | 107 | net_device = device->ext; |
53d21fdb HZ |
108 | if (net_device && atomic_read(&net_device->refcnt) > 1) |
109 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 110 | else |
85799a37 | 111 | net_device = NULL; |
fceaf24a | 112 | |
85799a37 | 113 | return net_device; |
fceaf24a HJ |
114 | } |
115 | ||
454f18a9 | 116 | /* Get the net device object iff exists and its refcount > 0 */ |
5a71ae30 | 117 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
fceaf24a | 118 | { |
85799a37 | 119 | struct netvsc_device *net_device; |
fceaf24a | 120 | |
ca623ad3 | 121 | net_device = device->ext; |
53d21fdb HZ |
122 | if (net_device && atomic_read(&net_device->refcnt)) |
123 | atomic_inc(&net_device->refcnt); | |
fceaf24a | 124 | else |
85799a37 | 125 | net_device = NULL; |
fceaf24a | 126 | |
85799a37 | 127 | return net_device; |
fceaf24a HJ |
128 | } |
129 | ||
5a71ae30 | 130 | static void put_net_device(struct hv_device *device) |
fceaf24a | 131 | { |
85799a37 | 132 | struct netvsc_device *net_device; |
fceaf24a | 133 | |
ca623ad3 | 134 | net_device = device->ext; |
972b9529 | 135 | /* ASSERT(netDevice); */ |
fceaf24a | 136 | |
53d21fdb | 137 | atomic_dec(&net_device->refcnt); |
fceaf24a HJ |
138 | } |
139 | ||
5a71ae30 HZ |
140 | static struct netvsc_device *release_outbound_net_device( |
141 | struct hv_device *device) | |
fceaf24a | 142 | { |
85799a37 | 143 | struct netvsc_device *net_device; |
fceaf24a | 144 | |
ca623ad3 | 145 | net_device = device->ext; |
85799a37 | 146 | if (net_device == NULL) |
fceaf24a HJ |
147 | return NULL; |
148 | ||
454f18a9 | 149 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
53d21fdb | 150 | while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2) |
b4362c9c | 151 | udelay(100); |
fceaf24a | 152 | |
85799a37 | 153 | return net_device; |
fceaf24a HJ |
154 | } |
155 | ||
5a71ae30 HZ |
156 | static struct netvsc_device *release_inbound_net_device( |
157 | struct hv_device *device) | |
fceaf24a | 158 | { |
85799a37 | 159 | struct netvsc_device *net_device; |
fceaf24a | 160 | |
ca623ad3 | 161 | net_device = device->ext; |
85799a37 | 162 | if (net_device == NULL) |
fceaf24a HJ |
163 | return NULL; |
164 | ||
454f18a9 | 165 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
53d21fdb | 166 | while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1) |
b4362c9c | 167 | udelay(100); |
fceaf24a | 168 | |
ca623ad3 | 169 | device->ext = NULL; |
85799a37 | 170 | return net_device; |
fceaf24a HJ |
171 | } |
172 | ||
3e189519 | 173 | /* |
5a71ae30 | 174 | * netvsc_initialize - Main entry point |
21a80820 | 175 | */ |
5a71ae30 | 176 | int netvsc_initialize(struct hv_driver *drv) |
fceaf24a | 177 | { |
7e23a6e9 | 178 | struct netvsc_driver *driver = (struct netvsc_driver *)drv; |
fceaf24a | 179 | |
21a80820 GKH |
180 | DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, " |
181 | "sizeof(struct nvsp_message)=%zd, " | |
182 | "sizeof(struct vmtransfer_page_packet_header)=%zd", | |
183 | sizeof(struct hv_netvsc_packet), | |
184 | sizeof(struct nvsp_message), | |
185 | sizeof(struct vmtransfer_page_packet_header)); | |
fceaf24a | 186 | |
454f18a9 | 187 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
972b9529 | 188 | /* ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); */ |
fceaf24a | 189 | |
85799a37 | 190 | drv->name = driver_name; |
ca623ad3 | 191 | memcpy(&drv->dev_type, &netvsc_device_type, sizeof(struct hv_guid)); |
fceaf24a | 192 | |
454f18a9 | 193 | /* Make sure it is set by the caller */ |
972b9529 BP |
194 | /* FIXME: These probably should still be tested in some way */ |
195 | /* ASSERT(driver->OnReceiveCallback); */ | |
196 | /* ASSERT(driver->OnLinkStatusChanged); */ | |
fceaf24a | 197 | |
454f18a9 | 198 | /* Setup the dispatch table */ |
ca623ad3 HZ |
199 | driver->base.dev_add = netvsc_device_add; |
200 | driver->base.dev_rm = netvsc_device_remove; | |
201 | driver->base.cleanup = netvsc_cleanup; | |
fceaf24a | 202 | |
72a2f5bd | 203 | driver->send = netvsc_send; |
fceaf24a | 204 | |
9c26aa0d | 205 | rndis_filter_init(driver); |
21a80820 | 206 | return 0; |
fceaf24a HJ |
207 | } |
208 | ||
5a71ae30 | 209 | static int netvsc_init_recv_buf(struct hv_device *device) |
fceaf24a | 210 | { |
21a80820 | 211 | int ret = 0; |
85799a37 HZ |
212 | struct netvsc_device *net_device; |
213 | struct nvsp_message *init_packet; | |
fceaf24a | 214 | |
5a71ae30 | 215 | net_device = get_outbound_net_device(device); |
85799a37 | 216 | if (!net_device) { |
21a80820 GKH |
217 | DPRINT_ERR(NETVSC, "unable to get net device..." |
218 | "device being destroyed?"); | |
fceaf24a HJ |
219 | return -1; |
220 | } | |
972b9529 | 221 | /* ASSERT(netDevice->ReceiveBufferSize > 0); */ |
21a80820 | 222 | /* page-size grandularity */ |
972b9529 | 223 | /* ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE - 1)) == 0); */ |
fceaf24a | 224 | |
53d21fdb | 225 | net_device->recv_buf = |
df3493e0 S |
226 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
227 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 228 | if (!net_device->recv_buf) { |
21a80820 GKH |
229 | DPRINT_ERR(NETVSC, |
230 | "unable to allocate receive buffer of size %d", | |
53d21fdb | 231 | net_device->recv_buf_size); |
fceaf24a HJ |
232 | ret = -1; |
233 | goto Cleanup; | |
234 | } | |
21a80820 | 235 | /* page-aligned buffer */ |
972b9529 BP |
236 | /* ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE - 1)) == */ |
237 | /* 0); */ | |
fceaf24a HJ |
238 | |
239 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
240 | ||
454f18a9 BP |
241 | /* |
242 | * Establish the gpadl handle for this buffer on this | |
243 | * channel. Note: This call uses the vmbus connection rather | |
244 | * than the channel to establish the gpadl handle. | |
245 | */ | |
53d21fdb HZ |
246 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
247 | net_device->recv_buf_size, | |
248 | &net_device->recv_buf_gpadl_handle); | |
21a80820 GKH |
249 | if (ret != 0) { |
250 | DPRINT_ERR(NETVSC, | |
251 | "unable to establish receive buffer's gpadl"); | |
fceaf24a HJ |
252 | goto Cleanup; |
253 | } | |
254 | ||
203df82d | 255 | /* osd_waitevent_wait(ext->ChannelInitEvent); */ |
fceaf24a | 256 | |
454f18a9 | 257 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
258 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); |
259 | ||
53d21fdb | 260 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 261 | |
85799a37 | 262 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 263 | |
53d21fdb HZ |
264 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
265 | init_packet->msg.v1_msg.send_recv_buf. | |
266 | gpadl_handle = net_device->recv_buf_gpadl_handle; | |
267 | init_packet->msg.v1_msg. | |
268 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 269 | |
454f18a9 | 270 | /* Send the gpadl notification request */ |
85799a37 | 271 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 272 | sizeof(struct nvsp_message), |
85799a37 | 273 | (unsigned long)init_packet, |
415f2287 | 274 | VM_PKT_DATA_INBAND, |
5a4df290 | 275 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 GKH |
276 | if (ret != 0) { |
277 | DPRINT_ERR(NETVSC, | |
278 | "unable to send receive buffer's gpadl to netvsp"); | |
fceaf24a HJ |
279 | goto Cleanup; |
280 | } | |
281 | ||
53d21fdb | 282 | osd_waitevent_wait(net_device->channel_init_event); |
fceaf24a | 283 | |
454f18a9 | 284 | /* Check the response */ |
53d21fdb HZ |
285 | if (init_packet->msg.v1_msg. |
286 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { | |
21a80820 GKH |
287 | DPRINT_ERR(NETVSC, "Unable to complete receive buffer " |
288 | "initialzation with NetVsp - status %d", | |
53d21fdb HZ |
289 | init_packet->msg.v1_msg. |
290 | send_recv_buf_complete.status); | |
fceaf24a HJ |
291 | ret = -1; |
292 | goto Cleanup; | |
293 | } | |
294 | ||
454f18a9 | 295 | /* Parse the response */ |
972b9529 BP |
296 | /* ASSERT(netDevice->ReceiveSectionCount == 0); */ |
297 | /* ASSERT(netDevice->ReceiveSections == NULL); */ | |
fceaf24a | 298 | |
53d21fdb HZ |
299 | net_device->recv_section_cnt = init_packet->msg. |
300 | v1_msg.send_recv_buf_complete.num_sections; | |
fceaf24a | 301 | |
53d21fdb | 302 | net_device->recv_section = kmalloc(net_device->recv_section_cnt |
85799a37 | 303 | * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
53d21fdb | 304 | if (net_device->recv_section == NULL) { |
fceaf24a HJ |
305 | ret = -1; |
306 | goto Cleanup; | |
307 | } | |
308 | ||
53d21fdb HZ |
309 | memcpy(net_device->recv_section, |
310 | init_packet->msg.v1_msg. | |
311 | send_recv_buf_complete.sections, | |
312 | net_device->recv_section_cnt * | |
85799a37 | 313 | sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 314 | |
21a80820 GKH |
315 | DPRINT_INFO(NETVSC, "Receive sections info (count %d, offset %d, " |
316 | "endoffset %d, suballoc size %d, num suballocs %d)", | |
53d21fdb HZ |
317 | net_device->recv_section_cnt, |
318 | net_device->recv_section[0].offset, | |
319 | net_device->recv_section[0].end_offset, | |
320 | net_device->recv_section[0].sub_alloc_size, | |
321 | net_device->recv_section[0].num_sub_allocs); | |
fceaf24a | 322 | |
21a80820 GKH |
323 | /* |
324 | * For 1st release, there should only be 1 section that represents the | |
325 | * entire receive buffer | |
326 | */ | |
53d21fdb HZ |
327 | if (net_device->recv_section_cnt != 1 || |
328 | net_device->recv_section->offset != 0) { | |
fceaf24a HJ |
329 | ret = -1; |
330 | goto Cleanup; | |
331 | } | |
332 | ||
333 | goto Exit; | |
334 | ||
335 | Cleanup: | |
5a71ae30 | 336 | netvsc_destroy_recv_buf(net_device); |
fceaf24a HJ |
337 | |
338 | Exit: | |
5a71ae30 | 339 | put_net_device(device); |
fceaf24a HJ |
340 | return ret; |
341 | } | |
342 | ||
5a71ae30 | 343 | static int netvsc_init_send_buf(struct hv_device *device) |
fceaf24a | 344 | { |
21a80820 | 345 | int ret = 0; |
85799a37 HZ |
346 | struct netvsc_device *net_device; |
347 | struct nvsp_message *init_packet; | |
fceaf24a | 348 | |
5a71ae30 | 349 | net_device = get_outbound_net_device(device); |
85799a37 | 350 | if (!net_device) { |
21a80820 GKH |
351 | DPRINT_ERR(NETVSC, "unable to get net device..." |
352 | "device being destroyed?"); | |
fceaf24a HJ |
353 | return -1; |
354 | } | |
53d21fdb | 355 | if (net_device->send_buf_size <= 0) { |
79069684 BP |
356 | ret = -EINVAL; |
357 | goto Cleanup; | |
358 | } | |
359 | ||
21a80820 | 360 | /* page-size grandularity */ |
972b9529 | 361 | /* ASSERT((netDevice->SendBufferSize & (PAGE_SIZE - 1)) == 0); */ |
21a80820 | 362 | |
53d21fdb | 363 | net_device->send_buf = |
df3493e0 S |
364 | (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
365 | get_order(net_device->send_buf_size)); | |
53d21fdb | 366 | if (!net_device->send_buf) { |
21a80820 | 367 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", |
53d21fdb | 368 | net_device->send_buf_size); |
fceaf24a HJ |
369 | ret = -1; |
370 | goto Cleanup; | |
371 | } | |
21a80820 | 372 | /* page-aligned buffer */ |
972b9529 | 373 | /* ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE - 1)) == 0); */ |
fceaf24a HJ |
374 | |
375 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
376 | ||
454f18a9 BP |
377 | /* |
378 | * Establish the gpadl handle for this buffer on this | |
379 | * channel. Note: This call uses the vmbus connection rather | |
380 | * than the channel to establish the gpadl handle. | |
381 | */ | |
53d21fdb HZ |
382 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, |
383 | net_device->send_buf_size, | |
384 | &net_device->send_buf_gpadl_handle); | |
21a80820 | 385 | if (ret != 0) { |
fceaf24a HJ |
386 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); |
387 | goto Cleanup; | |
388 | } | |
389 | ||
203df82d | 390 | /* osd_waitevent_wait(ext->ChannelInitEvent); */ |
fceaf24a | 391 | |
454f18a9 | 392 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
393 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); |
394 | ||
53d21fdb | 395 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 396 | |
85799a37 | 397 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 398 | |
53d21fdb HZ |
399 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; |
400 | init_packet->msg.v1_msg.send_recv_buf. | |
401 | gpadl_handle = net_device->send_buf_gpadl_handle; | |
402 | init_packet->msg.v1_msg.send_recv_buf.id = | |
85799a37 | 403 | NETVSC_SEND_BUFFER_ID; |
fceaf24a | 404 | |
454f18a9 | 405 | /* Send the gpadl notification request */ |
85799a37 | 406 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 407 | sizeof(struct nvsp_message), |
85799a37 | 408 | (unsigned long)init_packet, |
415f2287 | 409 | VM_PKT_DATA_INBAND, |
5a4df290 | 410 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 GKH |
411 | if (ret != 0) { |
412 | DPRINT_ERR(NETVSC, | |
413 | "unable to send receive buffer's gpadl to netvsp"); | |
fceaf24a HJ |
414 | goto Cleanup; |
415 | } | |
416 | ||
53d21fdb | 417 | osd_waitevent_wait(net_device->channel_init_event); |
fceaf24a | 418 | |
454f18a9 | 419 | /* Check the response */ |
53d21fdb HZ |
420 | if (init_packet->msg.v1_msg. |
421 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { | |
21a80820 GKH |
422 | DPRINT_ERR(NETVSC, "Unable to complete send buffer " |
423 | "initialzation with NetVsp - status %d", | |
53d21fdb HZ |
424 | init_packet->msg.v1_msg. |
425 | send_send_buf_complete.status); | |
fceaf24a HJ |
426 | ret = -1; |
427 | goto Cleanup; | |
428 | } | |
429 | ||
53d21fdb HZ |
430 | net_device->send_section_size = init_packet-> |
431 | msg.v1_msg.send_send_buf_complete.section_size; | |
fceaf24a HJ |
432 | |
433 | goto Exit; | |
434 | ||
435 | Cleanup: | |
5a71ae30 | 436 | netvsc_destroy_send_buf(net_device); |
fceaf24a HJ |
437 | |
438 | Exit: | |
5a71ae30 | 439 | put_net_device(device); |
fceaf24a HJ |
440 | return ret; |
441 | } | |
442 | ||
5a71ae30 | 443 | static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) |
fceaf24a | 444 | { |
85799a37 | 445 | struct nvsp_message *revoke_packet; |
21a80820 | 446 | int ret = 0; |
fceaf24a | 447 | |
454f18a9 BP |
448 | /* |
449 | * If we got a section count, it means we received a | |
450 | * SendReceiveBufferComplete msg (ie sent | |
451 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
452 | * to send a revoke msg here | |
453 | */ | |
53d21fdb | 454 | if (net_device->recv_section_cnt) { |
21a80820 GKH |
455 | DPRINT_INFO(NETVSC, |
456 | "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
fceaf24a | 457 | |
454f18a9 | 458 | /* Send the revoke receive buffer */ |
53d21fdb | 459 | revoke_packet = &net_device->revoke_packet; |
85799a37 | 460 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 461 | |
53d21fdb HZ |
462 | revoke_packet->hdr.msg_type = |
463 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; | |
464 | revoke_packet->msg.v1_msg. | |
465 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 466 | |
53d21fdb | 467 | ret = vmbus_sendpacket(net_device->dev->channel, |
85799a37 | 468 | revoke_packet, |
5a4df290 | 469 | sizeof(struct nvsp_message), |
85799a37 | 470 | (unsigned long)revoke_packet, |
415f2287 | 471 | VM_PKT_DATA_INBAND, 0); |
454f18a9 BP |
472 | /* |
473 | * If we failed here, we might as well return and | |
474 | * have a leak rather than continue and a bugchk | |
475 | */ | |
21a80820 GKH |
476 | if (ret != 0) { |
477 | DPRINT_ERR(NETVSC, "unable to send revoke receive " | |
478 | "buffer to netvsp"); | |
fceaf24a HJ |
479 | return -1; |
480 | } | |
481 | } | |
482 | ||
454f18a9 | 483 | /* Teardown the gpadl on the vsp end */ |
53d21fdb | 484 | if (net_device->recv_buf_gpadl_handle) { |
fceaf24a HJ |
485 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); |
486 | ||
53d21fdb HZ |
487 | ret = vmbus_teardown_gpadl(net_device->dev->channel, |
488 | net_device->recv_buf_gpadl_handle); | |
fceaf24a | 489 | |
454f18a9 | 490 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
21a80820 GKH |
491 | if (ret != 0) { |
492 | DPRINT_ERR(NETVSC, | |
493 | "unable to teardown receive buffer's gpadl"); | |
fceaf24a HJ |
494 | return -1; |
495 | } | |
53d21fdb | 496 | net_device->recv_buf_gpadl_handle = 0; |
fceaf24a HJ |
497 | } |
498 | ||
53d21fdb | 499 | if (net_device->recv_buf) { |
fceaf24a HJ |
500 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); |
501 | ||
454f18a9 | 502 | /* Free up the receive buffer */ |
df3493e0 S |
503 | free_pages((unsigned long)net_device->recv_buf, |
504 | get_order(net_device->recv_buf_size)); | |
53d21fdb | 505 | net_device->recv_buf = NULL; |
fceaf24a HJ |
506 | } |
507 | ||
53d21fdb HZ |
508 | if (net_device->recv_section) { |
509 | net_device->recv_section_cnt = 0; | |
510 | kfree(net_device->recv_section); | |
511 | net_device->recv_section = NULL; | |
fceaf24a HJ |
512 | } |
513 | ||
fceaf24a HJ |
514 | return ret; |
515 | } | |
516 | ||
5a71ae30 | 517 | static int netvsc_destroy_send_buf(struct netvsc_device *net_device) |
fceaf24a | 518 | { |
85799a37 | 519 | struct nvsp_message *revoke_packet; |
21a80820 | 520 | int ret = 0; |
fceaf24a | 521 | |
454f18a9 BP |
522 | /* |
523 | * If we got a section count, it means we received a | |
524 | * SendReceiveBufferComplete msg (ie sent | |
525 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
526 | * to send a revoke msg here | |
527 | */ | |
53d21fdb | 528 | if (net_device->send_section_size) { |
21a80820 GKH |
529 | DPRINT_INFO(NETVSC, |
530 | "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
fceaf24a | 531 | |
454f18a9 | 532 | /* Send the revoke send buffer */ |
53d21fdb | 533 | revoke_packet = &net_device->revoke_packet; |
85799a37 | 534 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 535 | |
53d21fdb HZ |
536 | revoke_packet->hdr.msg_type = |
537 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; | |
538 | revoke_packet->msg.v1_msg. | |
539 | revoke_send_buf.id = NETVSC_SEND_BUFFER_ID; | |
fceaf24a | 540 | |
53d21fdb | 541 | ret = vmbus_sendpacket(net_device->dev->channel, |
85799a37 | 542 | revoke_packet, |
5a4df290 | 543 | sizeof(struct nvsp_message), |
85799a37 | 544 | (unsigned long)revoke_packet, |
415f2287 | 545 | VM_PKT_DATA_INBAND, 0); |
21a80820 GKH |
546 | /* |
547 | * If we failed here, we might as well return and have a leak | |
548 | * rather than continue and a bugchk | |
549 | */ | |
550 | if (ret != 0) { | |
551 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer " | |
552 | "to netvsp"); | |
fceaf24a HJ |
553 | return -1; |
554 | } | |
555 | } | |
556 | ||
454f18a9 | 557 | /* Teardown the gpadl on the vsp end */ |
53d21fdb | 558 | if (net_device->send_buf_gpadl_handle) { |
fceaf24a | 559 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); |
53d21fdb HZ |
560 | ret = vmbus_teardown_gpadl(net_device->dev->channel, |
561 | net_device->send_buf_gpadl_handle); | |
fceaf24a | 562 | |
21a80820 GKH |
563 | /* |
564 | * If we failed here, we might as well return and have a leak | |
565 | * rather than continue and a bugchk | |
566 | */ | |
567 | if (ret != 0) { | |
568 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's " | |
569 | "gpadl"); | |
fceaf24a HJ |
570 | return -1; |
571 | } | |
53d21fdb | 572 | net_device->send_buf_gpadl_handle = 0; |
fceaf24a HJ |
573 | } |
574 | ||
53d21fdb | 575 | if (net_device->send_buf) { |
fceaf24a HJ |
576 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); |
577 | ||
454f18a9 | 578 | /* Free up the receive buffer */ |
df3493e0 S |
579 | free_pages((unsigned long)net_device->send_buf, |
580 | get_order(net_device->send_buf_size)); | |
53d21fdb | 581 | net_device->send_buf = NULL; |
fceaf24a HJ |
582 | } |
583 | ||
fceaf24a HJ |
584 | return ret; |
585 | } | |
586 | ||
587 | ||
5a71ae30 | 588 | static int netvsc_connect_vsp(struct hv_device *device) |
fceaf24a | 589 | { |
21a80820 | 590 | int ret; |
85799a37 HZ |
591 | struct netvsc_device *net_device; |
592 | struct nvsp_message *init_packet; | |
593 | int ndis_version; | |
fceaf24a | 594 | |
5a71ae30 | 595 | net_device = get_outbound_net_device(device); |
85799a37 | 596 | if (!net_device) { |
21a80820 GKH |
597 | DPRINT_ERR(NETVSC, "unable to get net device..." |
598 | "device being destroyed?"); | |
fceaf24a HJ |
599 | return -1; |
600 | } | |
601 | ||
53d21fdb | 602 | init_packet = &net_device->channel_init_pkt; |
fceaf24a | 603 | |
85799a37 | 604 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
53d21fdb HZ |
605 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
606 | init_packet->msg.init_msg.init.min_protocol_ver = | |
85799a37 | 607 | NVSP_MIN_PROTOCOL_VERSION; |
53d21fdb | 608 | init_packet->msg.init_msg.init.max_protocol_ver = |
85799a37 | 609 | NVSP_MAX_PROTOCOL_VERSION; |
fceaf24a HJ |
610 | |
611 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
612 | ||
454f18a9 | 613 | /* Send the init request */ |
85799a37 | 614 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 615 | sizeof(struct nvsp_message), |
85799a37 | 616 | (unsigned long)init_packet, |
415f2287 | 617 | VM_PKT_DATA_INBAND, |
5a4df290 | 618 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
21a80820 GKH |
619 | |
620 | if (ret != 0) { | |
fceaf24a HJ |
621 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); |
622 | goto Cleanup; | |
623 | } | |
624 | ||
53d21fdb | 625 | osd_waitevent_wait(net_device->channel_init_event); |
fceaf24a | 626 | |
454f18a9 BP |
627 | /* Now, check the response */ |
628 | /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ | |
fceaf24a | 629 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", |
53d21fdb HZ |
630 | init_packet->msg.init_msg.init_complete.status, |
631 | init_packet->msg.init_msg. | |
632 | init_complete.max_mdl_chain_len); | |
fceaf24a | 633 | |
53d21fdb HZ |
634 | if (init_packet->msg.init_msg.init_complete.status != |
635 | NVSP_STAT_SUCCESS) { | |
21a80820 GKH |
636 | DPRINT_ERR(NETVSC, |
637 | "unable to initialize with netvsp (status 0x%x)", | |
53d21fdb | 638 | init_packet->msg.init_msg.init_complete.status); |
fceaf24a HJ |
639 | ret = -1; |
640 | goto Cleanup; | |
641 | } | |
642 | ||
53d21fdb HZ |
643 | if (init_packet->msg.init_msg.init_complete. |
644 | negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { | |
21a80820 GKH |
645 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp " |
646 | "(version expected 1 got %d)", | |
53d21fdb HZ |
647 | init_packet->msg.init_msg. |
648 | init_complete.negotiated_protocol_ver); | |
fceaf24a HJ |
649 | ret = -1; |
650 | goto Cleanup; | |
651 | } | |
652 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
653 | ||
454f18a9 | 654 | /* Send the ndis version */ |
85799a37 | 655 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
fceaf24a | 656 | |
85799a37 | 657 | ndis_version = 0x00050000; |
fceaf24a | 658 | |
53d21fdb HZ |
659 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
660 | init_packet->msg.v1_msg. | |
661 | send_ndis_ver.ndis_major_ver = | |
85799a37 | 662 | (ndis_version & 0xFFFF0000) >> 16; |
53d21fdb HZ |
663 | init_packet->msg.v1_msg. |
664 | send_ndis_ver.ndis_minor_ver = | |
85799a37 | 665 | ndis_version & 0xFFFF; |
fceaf24a | 666 | |
454f18a9 | 667 | /* Send the init request */ |
85799a37 | 668 | ret = vmbus_sendpacket(device->channel, init_packet, |
5a4df290 | 669 | sizeof(struct nvsp_message), |
85799a37 | 670 | (unsigned long)init_packet, |
415f2287 | 671 | VM_PKT_DATA_INBAND, 0); |
21a80820 GKH |
672 | if (ret != 0) { |
673 | DPRINT_ERR(NETVSC, | |
674 | "unable to send NvspMessage1TypeSendNdisVersion"); | |
fceaf24a HJ |
675 | ret = -1; |
676 | goto Cleanup; | |
677 | } | |
454f18a9 BP |
678 | /* |
679 | * BUGBUG - We have to wait for the above msg since the | |
680 | * netvsp uses KMCL which acknowledges packet (completion | |
681 | * packet) since our Vmbus always set the | |
682 | * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
683 | */ | |
203df82d | 684 | /* osd_waitevent_wait(NetVscChannel->ChannelInitEvent); */ |
454f18a9 BP |
685 | |
686 | /* Post the big receive buffer to NetVSP */ | |
5a71ae30 | 687 | ret = netvsc_init_recv_buf(device); |
fceaf24a | 688 | if (ret == 0) |
5a71ae30 | 689 | ret = netvsc_init_send_buf(device); |
fceaf24a HJ |
690 | |
691 | Cleanup: | |
5a71ae30 | 692 | put_net_device(device); |
fceaf24a HJ |
693 | return ret; |
694 | } | |
695 | ||
85799a37 | 696 | static void NetVscDisconnectFromVsp(struct netvsc_device *net_device) |
fceaf24a | 697 | { |
5a71ae30 HZ |
698 | netvsc_destroy_recv_buf(net_device); |
699 | netvsc_destroy_send_buf(net_device); | |
fceaf24a HJ |
700 | } |
701 | ||
3e189519 | 702 | /* |
5a71ae30 HZ |
703 | * netvsc_device_add - Callback when the device belonging to this |
704 | * driver is added | |
21a80820 | 705 | */ |
5a71ae30 | 706 | static int netvsc_device_add(struct hv_device *device, void *additional_info) |
fceaf24a | 707 | { |
21a80820 | 708 | int ret = 0; |
fceaf24a | 709 | int i; |
85799a37 | 710 | struct netvsc_device *net_device; |
d29274ef | 711 | struct hv_netvsc_packet *packet, *pos; |
85799a37 | 712 | struct netvsc_driver *net_driver = |
ca623ad3 | 713 | (struct netvsc_driver *)device->drv; |
fceaf24a | 714 | |
5a71ae30 | 715 | net_device = alloc_net_device(device); |
85799a37 | 716 | if (!net_device) { |
fceaf24a HJ |
717 | ret = -1; |
718 | goto Cleanup; | |
719 | } | |
720 | ||
85799a37 | 721 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", net_device); |
fceaf24a | 722 | |
454f18a9 | 723 | /* Initialize the NetVSC channel extension */ |
53d21fdb HZ |
724 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; |
725 | spin_lock_init(&net_device->recv_pkt_list_lock); | |
fceaf24a | 726 | |
53d21fdb | 727 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
fceaf24a | 728 | |
53d21fdb | 729 | INIT_LIST_HEAD(&net_device->recv_pkt_list); |
fceaf24a | 730 | |
21a80820 GKH |
731 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { |
732 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
733 | (NETVSC_RECEIVE_SG_COUNT * | |
734 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
735 | if (!packet) { | |
736 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts " | |
737 | "for receive pool (wanted %d got %d)", | |
738 | NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
fceaf24a HJ |
739 | break; |
740 | } | |
72a2f5bd | 741 | list_add_tail(&packet->list_ent, |
53d21fdb | 742 | &net_device->recv_pkt_list); |
fceaf24a | 743 | } |
53d21fdb HZ |
744 | net_device->channel_init_event = osd_waitevent_create(); |
745 | if (!net_device->channel_init_event) { | |
80d11b2a BP |
746 | ret = -ENOMEM; |
747 | goto Cleanup; | |
748 | } | |
fceaf24a | 749 | |
454f18a9 | 750 | /* Open the channel */ |
72a2f5bd HZ |
751 | ret = vmbus_open(device->channel, net_driver->ring_buf_size, |
752 | net_driver->ring_buf_size, NULL, 0, | |
5a71ae30 | 753 | netvsc_channel_cb, device); |
fceaf24a | 754 | |
21a80820 | 755 | if (ret != 0) { |
fceaf24a HJ |
756 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); |
757 | ret = -1; | |
758 | goto Cleanup; | |
759 | } | |
760 | ||
454f18a9 | 761 | /* Channel is opened */ |
fceaf24a HJ |
762 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); |
763 | ||
454f18a9 | 764 | /* Connect with the NetVsp */ |
5a71ae30 | 765 | ret = netvsc_connect_vsp(device); |
21a80820 | 766 | if (ret != 0) { |
fceaf24a HJ |
767 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); |
768 | ret = -1; | |
1fb9dff0 | 769 | goto close; |
fceaf24a HJ |
770 | } |
771 | ||
21a80820 GKH |
772 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", |
773 | ret); | |
fceaf24a | 774 | |
fceaf24a HJ |
775 | return ret; |
776 | ||
1fb9dff0 | 777 | close: |
454f18a9 | 778 | /* Now, we can close the channel safely */ |
85799a37 | 779 | vmbus_close(device->channel); |
fceaf24a HJ |
780 | |
781 | Cleanup: | |
782 | ||
85799a37 | 783 | if (net_device) { |
53d21fdb | 784 | kfree(net_device->channel_init_event); |
fceaf24a | 785 | |
d29274ef | 786 | list_for_each_entry_safe(packet, pos, |
53d21fdb | 787 | &net_device->recv_pkt_list, |
72a2f5bd HZ |
788 | list_ent) { |
789 | list_del(&packet->list_ent); | |
8c69f52a | 790 | kfree(packet); |
fceaf24a HJ |
791 | } |
792 | ||
5a71ae30 HZ |
793 | release_outbound_net_device(device); |
794 | release_inbound_net_device(device); | |
fceaf24a | 795 | |
5a71ae30 | 796 | free_net_device(net_device); |
fceaf24a HJ |
797 | } |
798 | ||
fceaf24a HJ |
799 | return ret; |
800 | } | |
801 | ||
3e189519 | 802 | /* |
5a71ae30 | 803 | * netvsc_device_remove - Callback when the root bus device is removed |
21a80820 | 804 | */ |
5a71ae30 | 805 | static int netvsc_device_remove(struct hv_device *device) |
fceaf24a | 806 | { |
85799a37 HZ |
807 | struct netvsc_device *net_device; |
808 | struct hv_netvsc_packet *netvsc_packet, *pos; | |
fceaf24a | 809 | |
21a80820 | 810 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", |
ca623ad3 | 811 | device->ext); |
fceaf24a | 812 | |
454f18a9 | 813 | /* Stop outbound traffic ie sends and receives completions */ |
5a71ae30 | 814 | net_device = release_outbound_net_device(device); |
85799a37 | 815 | if (!net_device) { |
fceaf24a HJ |
816 | DPRINT_ERR(NETVSC, "No net device present!!"); |
817 | return -1; | |
818 | } | |
819 | ||
454f18a9 | 820 | /* Wait for all send completions */ |
53d21fdb | 821 | while (atomic_read(&net_device->num_outstanding_sends)) { |
21a80820 | 822 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", |
53d21fdb | 823 | atomic_read(&net_device->num_outstanding_sends)); |
b4362c9c | 824 | udelay(100); |
fceaf24a HJ |
825 | } |
826 | ||
827 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
828 | ||
85799a37 | 829 | NetVscDisconnectFromVsp(net_device); |
fceaf24a | 830 | |
21a80820 | 831 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", |
ca623ad3 | 832 | device->ext); |
fceaf24a | 833 | |
454f18a9 | 834 | /* Stop inbound traffic ie receives and sends completions */ |
5a71ae30 | 835 | net_device = release_inbound_net_device(device); |
fceaf24a | 836 | |
454f18a9 | 837 | /* At this point, no one should be accessing netDevice except in here */ |
85799a37 | 838 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", net_device); |
fceaf24a | 839 | |
454f18a9 | 840 | /* Now, we can close the channel safely */ |
85799a37 | 841 | vmbus_close(device->channel); |
fceaf24a | 842 | |
454f18a9 | 843 | /* Release all resources */ |
85799a37 | 844 | list_for_each_entry_safe(netvsc_packet, pos, |
53d21fdb | 845 | &net_device->recv_pkt_list, list_ent) { |
72a2f5bd | 846 | list_del(&netvsc_packet->list_ent); |
85799a37 | 847 | kfree(netvsc_packet); |
fceaf24a HJ |
848 | } |
849 | ||
53d21fdb | 850 | kfree(net_device->channel_init_event); |
5a71ae30 | 851 | free_net_device(net_device); |
21a80820 | 852 | return 0; |
fceaf24a HJ |
853 | } |
854 | ||
3e189519 | 855 | /* |
5a71ae30 | 856 | * netvsc_cleanup - Perform any cleanup when the driver is removed |
21a80820 | 857 | */ |
5a71ae30 | 858 | static void netvsc_cleanup(struct hv_driver *drv) |
fceaf24a | 859 | { |
fceaf24a HJ |
860 | } |
861 | ||
5a71ae30 | 862 | static void netvsc_send_completion(struct hv_device *device, |
85799a37 | 863 | struct vmpacket_descriptor *packet) |
fceaf24a | 864 | { |
85799a37 HZ |
865 | struct netvsc_device *net_device; |
866 | struct nvsp_message *nvsp_packet; | |
867 | struct hv_netvsc_packet *nvsc_packet; | |
fceaf24a | 868 | |
5a71ae30 | 869 | net_device = get_inbound_net_device(device); |
85799a37 | 870 | if (!net_device) { |
21a80820 GKH |
871 | DPRINT_ERR(NETVSC, "unable to get net device..." |
872 | "device being destroyed?"); | |
fceaf24a HJ |
873 | return; |
874 | } | |
875 | ||
85799a37 | 876 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 877 | (packet->offset8 << 3)); |
fceaf24a | 878 | |
21a80820 | 879 | DPRINT_DBG(NETVSC, "send completion packet - type %d", |
53d21fdb | 880 | nvsp_packet->hdr.msg_type); |
fceaf24a | 881 | |
53d21fdb HZ |
882 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
883 | (nvsp_packet->hdr.msg_type == | |
884 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || | |
885 | (nvsp_packet->hdr.msg_type == | |
886 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { | |
454f18a9 | 887 | /* Copy the response back */ |
53d21fdb | 888 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
21a80820 | 889 | sizeof(struct nvsp_message)); |
53d21fdb HZ |
890 | osd_waitevent_set(net_device->channel_init_event); |
891 | } else if (nvsp_packet->hdr.msg_type == | |
892 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { | |
454f18a9 | 893 | /* Get the send context */ |
85799a37 | 894 | nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) |
415f2287 | 895 | packet->trans_id; |
972b9529 | 896 | /* ASSERT(nvscPacket); */ |
fceaf24a | 897 | |
454f18a9 | 898 | /* Notify the layer above us */ |
72a2f5bd HZ |
899 | nvsc_packet->completion.send.send_completion( |
900 | nvsc_packet->completion.send.send_completion_ctx); | |
fceaf24a | 901 | |
53d21fdb | 902 | atomic_dec(&net_device->num_outstanding_sends); |
21a80820 GKH |
903 | } else { |
904 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - " | |
53d21fdb | 905 | "%d received!!", nvsp_packet->hdr.msg_type); |
fceaf24a HJ |
906 | } |
907 | ||
5a71ae30 | 908 | put_net_device(device); |
fceaf24a HJ |
909 | } |
910 | ||
5a71ae30 | 911 | static int netvsc_send(struct hv_device *device, |
85799a37 | 912 | struct hv_netvsc_packet *packet) |
fceaf24a | 913 | { |
85799a37 | 914 | struct netvsc_device *net_device; |
21a80820 | 915 | int ret = 0; |
fceaf24a | 916 | |
223c1aa6 | 917 | struct nvsp_message sendMessage; |
fceaf24a | 918 | |
5a71ae30 | 919 | net_device = get_outbound_net_device(device); |
85799a37 | 920 | if (!net_device) { |
21a80820 | 921 | DPRINT_ERR(NETVSC, "net device (%p) shutting down..." |
85799a37 | 922 | "ignoring outbound packets", net_device); |
fceaf24a HJ |
923 | return -2; |
924 | } | |
925 | ||
53d21fdb | 926 | sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
72a2f5bd | 927 | if (packet->is_data_pkt) { |
21a80820 | 928 | /* 0 is RMC_DATA; */ |
53d21fdb | 929 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
21a80820 GKH |
930 | } else { |
931 | /* 1 is RMC_CONTROL; */ | |
53d21fdb | 932 | sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
21a80820 | 933 | } |
fceaf24a | 934 | |
454f18a9 | 935 | /* Not using send buffer section */ |
53d21fdb HZ |
936 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
937 | 0xFFFFFFFF; | |
938 | sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; | |
21a80820 | 939 | |
72a2f5bd | 940 | if (packet->page_buf_cnt) { |
85799a37 | 941 | ret = vmbus_sendpacket_pagebuffer(device->channel, |
72a2f5bd HZ |
942 | packet->page_buf, |
943 | packet->page_buf_cnt, | |
ff3f8eec GKH |
944 | &sendMessage, |
945 | sizeof(struct nvsp_message), | |
85799a37 | 946 | (unsigned long)packet); |
21a80820 | 947 | } else { |
85799a37 | 948 | ret = vmbus_sendpacket(device->channel, &sendMessage, |
5a4df290 | 949 | sizeof(struct nvsp_message), |
85799a37 | 950 | (unsigned long)packet, |
415f2287 | 951 | VM_PKT_DATA_INBAND, |
5a4df290 | 952 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
fceaf24a HJ |
953 | |
954 | } | |
955 | ||
956 | if (ret != 0) | |
21a80820 | 957 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", |
85799a37 | 958 | packet, ret); |
fceaf24a | 959 | |
53d21fdb | 960 | atomic_inc(&net_device->num_outstanding_sends); |
5a71ae30 | 961 | put_net_device(device); |
fceaf24a HJ |
962 | return ret; |
963 | } | |
964 | ||
5a71ae30 | 965 | static void netvsc_receive(struct hv_device *device, |
85799a37 | 966 | struct vmpacket_descriptor *packet) |
fceaf24a | 967 | { |
85799a37 HZ |
968 | struct netvsc_device *net_device; |
969 | struct vmtransfer_page_packet_header *vmxferpage_packet; | |
970 | struct nvsp_message *nvsp_packet; | |
971 | struct hv_netvsc_packet *netvsc_packet = NULL; | |
c4b0bc94 | 972 | unsigned long start; |
85799a37 | 973 | unsigned long end, end_virtual; |
7e23a6e9 | 974 | /* struct netvsc_driver *netvscDriver; */ |
85799a37 | 975 | struct xferpage_packet *xferpage_packet = NULL; |
21a80820 | 976 | int i, j; |
85799a37 | 977 | int count = 0, bytes_remain = 0; |
6436873a | 978 | unsigned long flags; |
d29274ef | 979 | LIST_HEAD(listHead); |
fceaf24a | 980 | |
5a71ae30 | 981 | net_device = get_inbound_net_device(device); |
85799a37 | 982 | if (!net_device) { |
21a80820 GKH |
983 | DPRINT_ERR(NETVSC, "unable to get net device..." |
984 | "device being destroyed?"); | |
fceaf24a HJ |
985 | return; |
986 | } | |
987 | ||
21a80820 GKH |
988 | /* |
989 | * All inbound packets other than send completion should be xfer page | |
990 | * packet | |
991 | */ | |
415f2287 | 992 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
21a80820 | 993 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", |
415f2287 | 994 | packet->type); |
5a71ae30 | 995 | put_net_device(device); |
fceaf24a HJ |
996 | return; |
997 | } | |
998 | ||
85799a37 | 999 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
415f2287 | 1000 | (packet->offset8 << 3)); |
fceaf24a | 1001 | |
454f18a9 | 1002 | /* Make sure this is a valid nvsp packet */ |
53d21fdb HZ |
1003 | if (nvsp_packet->hdr.msg_type != |
1004 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { | |
21a80820 | 1005 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", |
53d21fdb | 1006 | nvsp_packet->hdr.msg_type); |
5a71ae30 | 1007 | put_net_device(device); |
fceaf24a HJ |
1008 | return; |
1009 | } | |
1010 | ||
21a80820 | 1011 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", |
53d21fdb | 1012 | nvsp_packet->hdr.msg_type); |
fceaf24a | 1013 | |
85799a37 | 1014 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
fceaf24a | 1015 | |
415f2287 | 1016 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
21a80820 GKH |
1017 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - " |
1018 | "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, | |
415f2287 | 1019 | vmxferpage_packet->xfer_pageset_id); |
5a71ae30 | 1020 | put_net_device(device); |
fceaf24a HJ |
1021 | return; |
1022 | } | |
1023 | ||
21a80820 | 1024 | DPRINT_DBG(NETVSC, "xfer page - range count %d", |
415f2287 | 1025 | vmxferpage_packet->range_cnt); |
fceaf24a | 1026 | |
454f18a9 BP |
1027 | /* |
1028 | * Grab free packets (range count + 1) to represent this xfer | |
1029 | * page packet. +1 to represent the xfer page packet itself. | |
1030 | * We grab it here so that we know exactly how many we can | |
1031 | * fulfil | |
1032 | */ | |
53d21fdb HZ |
1033 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
1034 | while (!list_empty(&net_device->recv_pkt_list)) { | |
1035 | list_move_tail(net_device->recv_pkt_list.next, &listHead); | |
415f2287 | 1036 | if (++count == vmxferpage_packet->range_cnt + 1) |
fceaf24a HJ |
1037 | break; |
1038 | } | |
53d21fdb | 1039 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 1040 | |
454f18a9 BP |
1041 | /* |
1042 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
1043 | * page and at least 1 for the range) i.e. we can handled | |
1044 | * some of the xfer page packet ranges... | |
1045 | */ | |
21a80820 GKH |
1046 | if (count < 2) { |
1047 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. " | |
1048 | "Dropping this xfer page packet completely!", | |
415f2287 | 1049 | count, vmxferpage_packet->range_cnt + 1); |
fceaf24a | 1050 | |
454f18a9 | 1051 | /* Return it to the freelist */ |
53d21fdb | 1052 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
21a80820 | 1053 | for (i = count; i != 0; i--) { |
92ec0893 | 1054 | list_move_tail(listHead.next, |
53d21fdb | 1055 | &net_device->recv_pkt_list); |
fceaf24a | 1056 | } |
53d21fdb | 1057 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, |
21a80820 | 1058 | flags); |
fceaf24a | 1059 | |
5a71ae30 | 1060 | netvsc_send_recv_completion(device, |
415f2287 | 1061 | vmxferpage_packet->d.trans_id); |
fceaf24a | 1062 | |
5a71ae30 | 1063 | put_net_device(device); |
fceaf24a HJ |
1064 | return; |
1065 | } | |
1066 | ||
454f18a9 | 1067 | /* Remove the 1st packet to represent the xfer page packet itself */ |
85799a37 | 1068 | xferpage_packet = (struct xferpage_packet *)listHead.next; |
72a2f5bd | 1069 | list_del(&xferpage_packet->list_ent); |
d29274ef | 1070 | |
21a80820 | 1071 | /* This is how much we can satisfy */ |
72a2f5bd | 1072 | xferpage_packet->count = count - 1; |
972b9529 BP |
1073 | /* ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= */ |
1074 | /* vmxferpagePacket->RangeCount); */ | |
21a80820 | 1075 | |
415f2287 | 1076 | if (xferpage_packet->count != vmxferpage_packet->range_cnt) { |
21a80820 | 1077 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer " |
415f2287 | 1078 | "page...got %d", vmxferpage_packet->range_cnt, |
72a2f5bd | 1079 | xferpage_packet->count); |
fceaf24a HJ |
1080 | } |
1081 | ||
454f18a9 | 1082 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 1083 | for (i = 0; i < (count - 1); i++) { |
85799a37 | 1084 | netvsc_packet = (struct hv_netvsc_packet *)listHead.next; |
72a2f5bd | 1085 | list_del(&netvsc_packet->list_ent); |
fceaf24a | 1086 | |
454f18a9 | 1087 | /* Initialize the netvsc packet */ |
72a2f5bd HZ |
1088 | netvsc_packet->xfer_page_pkt = xferpage_packet; |
1089 | netvsc_packet->completion.recv.recv_completion = | |
5a71ae30 | 1090 | netvsc_receive_completion; |
72a2f5bd | 1091 | netvsc_packet->completion.recv.recv_completion_ctx = |
85799a37 | 1092 | netvsc_packet; |
72a2f5bd | 1093 | netvsc_packet->device = device; |
21a80820 | 1094 | /* Save this so that we can send it back */ |
72a2f5bd | 1095 | netvsc_packet->completion.recv.recv_completion_tid = |
415f2287 | 1096 | vmxferpage_packet->d.trans_id; |
fceaf24a | 1097 | |
72a2f5bd | 1098 | netvsc_packet->total_data_buflen = |
415f2287 | 1099 | vmxferpage_packet->ranges[i].byte_count; |
72a2f5bd | 1100 | netvsc_packet->page_buf_cnt = 1; |
fceaf24a | 1101 | |
972b9529 BP |
1102 | /* ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + */ |
1103 | /* vmxferpagePacket->Ranges[i].ByteCount < */ | |
1104 | /* netDevice->ReceiveBufferSize); */ | |
fceaf24a | 1105 | |
ca623ad3 | 1106 | netvsc_packet->page_buf[0].len = |
415f2287 | 1107 | vmxferpage_packet->ranges[i].byte_count; |
fceaf24a | 1108 | |
85799a37 | 1109 | start = virt_to_phys((void *)((unsigned long)net_device-> |
415f2287 | 1110 | recv_buf + vmxferpage_packet->ranges[i].byte_offset)); |
fceaf24a | 1111 | |
ca623ad3 | 1112 | netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT; |
53d21fdb | 1113 | end_virtual = (unsigned long)net_device->recv_buf |
415f2287 HZ |
1114 | + vmxferpage_packet->ranges[i].byte_offset |
1115 | + vmxferpage_packet->ranges[i].byte_count - 1; | |
85799a37 | 1116 | end = virt_to_phys((void *)end_virtual); |
fceaf24a | 1117 | |
454f18a9 | 1118 | /* Calculate the page relative offset */ |
ca623ad3 | 1119 | netvsc_packet->page_buf[0].offset = |
415f2287 | 1120 | vmxferpage_packet->ranges[i].byte_offset & |
85799a37 | 1121 | (PAGE_SIZE - 1); |
21a80820 GKH |
1122 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { |
1123 | /* Handle frame across multiple pages: */ | |
ca623ad3 HZ |
1124 | netvsc_packet->page_buf[0].len = |
1125 | (netvsc_packet->page_buf[0].pfn << | |
85799a37 | 1126 | PAGE_SHIFT) |
21a80820 | 1127 | + PAGE_SIZE - start; |
72a2f5bd | 1128 | bytes_remain = netvsc_packet->total_data_buflen - |
ca623ad3 | 1129 | netvsc_packet->page_buf[0].len; |
21a80820 | 1130 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { |
ca623ad3 | 1131 | netvsc_packet->page_buf[j].offset = 0; |
85799a37 | 1132 | if (bytes_remain <= PAGE_SIZE) { |
ca623ad3 | 1133 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
1134 | bytes_remain; |
1135 | bytes_remain = 0; | |
21a80820 | 1136 | } else { |
ca623ad3 | 1137 | netvsc_packet->page_buf[j].len = |
85799a37 HZ |
1138 | PAGE_SIZE; |
1139 | bytes_remain -= PAGE_SIZE; | |
21a80820 | 1140 | } |
ca623ad3 | 1141 | netvsc_packet->page_buf[j].pfn = |
85799a37 HZ |
1142 | virt_to_phys((void *)(end_virtual - |
1143 | bytes_remain)) >> PAGE_SHIFT; | |
72a2f5bd | 1144 | netvsc_packet->page_buf_cnt++; |
85799a37 | 1145 | if (bytes_remain == 0) |
21a80820 | 1146 | break; |
fceaf24a | 1147 | } |
972b9529 | 1148 | /* ASSERT(bytesRemain == 0); */ |
fceaf24a | 1149 | } |
21a80820 GKH |
1150 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => " |
1151 | "(pfn %llx, offset %u, len %u)", i, | |
415f2287 HZ |
1152 | vmxferpage_packet->ranges[i].byte_offset, |
1153 | vmxferpage_packet->ranges[i].byte_count, | |
ca623ad3 HZ |
1154 | netvsc_packet->page_buf[0].pfn, |
1155 | netvsc_packet->page_buf[0].offset, | |
1156 | netvsc_packet->page_buf[0].len); | |
fceaf24a | 1157 | |
454f18a9 | 1158 | /* Pass it to the upper layer */ |
ca623ad3 | 1159 | ((struct netvsc_driver *)device->drv)-> |
72a2f5bd | 1160 | recv_cb(device, netvsc_packet); |
fceaf24a | 1161 | |
5a71ae30 | 1162 | netvsc_receive_completion(netvsc_packet-> |
72a2f5bd | 1163 | completion.recv.recv_completion_ctx); |
fceaf24a HJ |
1164 | } |
1165 | ||
972b9529 | 1166 | /* ASSERT(list_empty(&listHead)); */ |
fceaf24a | 1167 | |
5a71ae30 | 1168 | put_net_device(device); |
fceaf24a HJ |
1169 | } |
1170 | ||
5a71ae30 | 1171 | static void netvsc_send_recv_completion(struct hv_device *device, |
85799a37 | 1172 | u64 transaction_id) |
fceaf24a | 1173 | { |
223c1aa6 | 1174 | struct nvsp_message recvcompMessage; |
21a80820 GKH |
1175 | int retries = 0; |
1176 | int ret; | |
fceaf24a | 1177 | |
21a80820 | 1178 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", |
85799a37 | 1179 | transaction_id); |
fceaf24a | 1180 | |
53d21fdb HZ |
1181 | recvcompMessage.hdr.msg_type = |
1182 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; | |
fceaf24a | 1183 | |
454f18a9 | 1184 | /* FIXME: Pass in the status */ |
53d21fdb HZ |
1185 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = |
1186 | NVSP_STAT_SUCCESS; | |
fceaf24a HJ |
1187 | |
1188 | retry_send_cmplt: | |
454f18a9 | 1189 | /* Send the completion */ |
85799a37 HZ |
1190 | ret = vmbus_sendpacket(device->channel, &recvcompMessage, |
1191 | sizeof(struct nvsp_message), transaction_id, | |
415f2287 | 1192 | VM_PKT_COMP, 0); |
21a80820 GKH |
1193 | if (ret == 0) { |
1194 | /* success */ | |
454f18a9 | 1195 | /* no-op */ |
21a80820 GKH |
1196 | } else if (ret == -1) { |
1197 | /* no more room...wait a bit and attempt to retry 3 times */ | |
fceaf24a | 1198 | retries++; |
21a80820 | 1199 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt " |
85799a37 | 1200 | "(tid %llx)...retrying %d", transaction_id, retries); |
fceaf24a | 1201 | |
21a80820 | 1202 | if (retries < 4) { |
b4362c9c | 1203 | udelay(100); |
fceaf24a | 1204 | goto retry_send_cmplt; |
21a80820 GKH |
1205 | } else { |
1206 | DPRINT_ERR(NETVSC, "unable to send receive completion " | |
1207 | "pkt (tid %llx)...give up retrying", | |
85799a37 | 1208 | transaction_id); |
fceaf24a | 1209 | } |
21a80820 GKH |
1210 | } else { |
1211 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - " | |
85799a37 | 1212 | "%llx", transaction_id); |
fceaf24a HJ |
1213 | } |
1214 | } | |
1215 | ||
454f18a9 | 1216 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
5a71ae30 | 1217 | static void netvsc_receive_completion(void *context) |
fceaf24a | 1218 | { |
85799a37 | 1219 | struct hv_netvsc_packet *packet = context; |
72a2f5bd | 1220 | struct hv_device *device = (struct hv_device *)packet->device; |
85799a37 HZ |
1221 | struct netvsc_device *net_device; |
1222 | u64 transaction_id = 0; | |
1223 | bool fsend_receive_comp = false; | |
6436873a | 1224 | unsigned long flags; |
fceaf24a | 1225 | |
972b9529 | 1226 | /* ASSERT(packet->XferPagePacket); */ |
fceaf24a | 1227 | |
21a80820 GKH |
1228 | /* |
1229 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
1230 | * send out receive completion, we are using GetInboundNetDevice() | |
1231 | * since we may have disable outbound traffic already. | |
1232 | */ | |
5a71ae30 | 1233 | net_device = get_inbound_net_device(device); |
85799a37 | 1234 | if (!net_device) { |
21a80820 GKH |
1235 | DPRINT_ERR(NETVSC, "unable to get net device..." |
1236 | "device being destroyed?"); | |
fceaf24a HJ |
1237 | return; |
1238 | } | |
1239 | ||
454f18a9 | 1240 | /* Overloading use of the lock. */ |
53d21fdb | 1241 | spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); |
fceaf24a | 1242 | |
972b9529 | 1243 | /* ASSERT(packet->XferPagePacket->Count > 0); */ |
72a2f5bd | 1244 | packet->xfer_page_pkt->count--; |
fceaf24a | 1245 | |
21a80820 GKH |
1246 | /* |
1247 | * Last one in the line that represent 1 xfer page packet. | |
1248 | * Return the xfer page packet itself to the freelist | |
1249 | */ | |
72a2f5bd | 1250 | if (packet->xfer_page_pkt->count == 0) { |
85799a37 | 1251 | fsend_receive_comp = true; |
72a2f5bd HZ |
1252 | transaction_id = packet->completion.recv.recv_completion_tid; |
1253 | list_add_tail(&packet->xfer_page_pkt->list_ent, | |
53d21fdb | 1254 | &net_device->recv_pkt_list); |
fceaf24a | 1255 | |
fceaf24a HJ |
1256 | } |
1257 | ||
454f18a9 | 1258 | /* Put the packet back */ |
53d21fdb HZ |
1259 | list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); |
1260 | spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); | |
fceaf24a | 1261 | |
454f18a9 | 1262 | /* Send a receive completion for the xfer page packet */ |
85799a37 | 1263 | if (fsend_receive_comp) |
5a71ae30 | 1264 | netvsc_send_recv_completion(device, transaction_id); |
fceaf24a | 1265 | |
5a71ae30 | 1266 | put_net_device(device); |
fceaf24a HJ |
1267 | } |
1268 | ||
5a71ae30 | 1269 | static void netvsc_channel_cb(void *context) |
fceaf24a | 1270 | { |
21a80820 | 1271 | int ret; |
85799a37 HZ |
1272 | struct hv_device *device = context; |
1273 | struct netvsc_device *net_device; | |
1274 | u32 bytes_recvd; | |
1275 | u64 request_id; | |
c6fcf0ba | 1276 | unsigned char *packet; |
8dc0a06a | 1277 | struct vmpacket_descriptor *desc; |
c6fcf0ba BP |
1278 | unsigned char *buffer; |
1279 | int bufferlen = NETVSC_PACKET_SIZE; | |
fceaf24a | 1280 | |
972b9529 | 1281 | /* ASSERT(device); */ |
fceaf24a | 1282 | |
c6fcf0ba | 1283 | packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), |
d70c6731 | 1284 | GFP_ATOMIC); |
c6fcf0ba BP |
1285 | if (!packet) |
1286 | return; | |
1287 | buffer = packet; | |
1288 | ||
5a71ae30 | 1289 | net_device = get_inbound_net_device(device); |
85799a37 | 1290 | if (!net_device) { |
21a80820 | 1291 | DPRINT_ERR(NETVSC, "net device (%p) shutting down..." |
85799a37 | 1292 | "ignoring inbound packets", net_device); |
c6fcf0ba | 1293 | goto out; |
fceaf24a HJ |
1294 | } |
1295 | ||
21a80820 | 1296 | do { |
9f630068 | 1297 | ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, |
85799a37 | 1298 | &bytes_recvd, &request_id); |
21a80820 | 1299 | if (ret == 0) { |
85799a37 | 1300 | if (bytes_recvd > 0) { |
21a80820 | 1301 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", |
85799a37 | 1302 | bytes_recvd, request_id); |
21a80820 GKH |
1303 | |
1304 | desc = (struct vmpacket_descriptor *)buffer; | |
415f2287 HZ |
1305 | switch (desc->type) { |
1306 | case VM_PKT_COMP: | |
5a71ae30 | 1307 | netvsc_send_completion(device, desc); |
21a80820 GKH |
1308 | break; |
1309 | ||
415f2287 | 1310 | case VM_PKT_DATA_USING_XFER_PAGES: |
5a71ae30 | 1311 | netvsc_receive(device, desc); |
21a80820 GKH |
1312 | break; |
1313 | ||
1314 | default: | |
1315 | DPRINT_ERR(NETVSC, | |
1316 | "unhandled packet type %d, " | |
1317 | "tid %llx len %d\n", | |
415f2287 | 1318 | desc->type, request_id, |
85799a37 | 1319 | bytes_recvd); |
21a80820 | 1320 | break; |
fceaf24a HJ |
1321 | } |
1322 | ||
454f18a9 | 1323 | /* reset */ |
c6fcf0ba | 1324 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 1325 | kfree(buffer); |
fceaf24a | 1326 | buffer = packet; |
c6fcf0ba | 1327 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a | 1328 | } |
21a80820 | 1329 | } else { |
454f18a9 | 1330 | /* reset */ |
c6fcf0ba | 1331 | if (bufferlen > NETVSC_PACKET_SIZE) { |
8c69f52a | 1332 | kfree(buffer); |
fceaf24a | 1333 | buffer = packet; |
c6fcf0ba | 1334 | bufferlen = NETVSC_PACKET_SIZE; |
fceaf24a HJ |
1335 | } |
1336 | ||
1337 | break; | |
1338 | } | |
21a80820 GKH |
1339 | } else if (ret == -2) { |
1340 | /* Handle large packet */ | |
85799a37 | 1341 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
21a80820 | 1342 | if (buffer == NULL) { |
454f18a9 | 1343 | /* Try again next time around */ |
21a80820 GKH |
1344 | DPRINT_ERR(NETVSC, |
1345 | "unable to allocate buffer of size " | |
85799a37 | 1346 | "(%d)!!", bytes_recvd); |
fceaf24a HJ |
1347 | break; |
1348 | } | |
1349 | ||
85799a37 | 1350 | bufferlen = bytes_recvd; |
fceaf24a HJ |
1351 | } |
1352 | } while (1); | |
1353 | ||
5a71ae30 | 1354 | put_net_device(device); |
c6fcf0ba BP |
1355 | out: |
1356 | kfree(buffer); | |
fceaf24a HJ |
1357 | return; |
1358 | } |