Commit | Line | Data |
---|---|---|
3e7ee490 | 1 | /* |
3e7ee490 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: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
0a46618d 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> | |
a0086dc5 | 26 | #include <linux/mm.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
c88c4e4c | 28 | #include <linux/module.h> |
e3fe0bb6 | 29 | #include "hv_api.h" |
645954c5 | 30 | #include "logging.h" |
72daf320 | 31 | #include "vmbus_private.h" |
3e7ee490 | 32 | |
e3fe0bb6 S |
33 | #define NUM_PAGES_SPANNED(addr, len) \ |
34 | ((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT)) | |
35 | ||
454f18a9 | 36 | /* Internal routines */ |
fff41b2e | 37 | static int create_gpadl_header( |
39d70a4a HZ |
38 | void *kbuffer, /* must be phys and virt contiguous */ |
39 | u32 size, /* page-size multiple */ | |
40 | struct vmbus_channel_msginfo **msginfo, | |
41 | u32 *messagecount); | |
fff41b2e HZ |
42 | static void dump_vmbus_channel(struct vmbus_channel *channel); |
43 | static void vmbus_setevent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
44 | |
45 | ||
46 | #if 0 | |
f4266e34 | 47 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 48 | { |
f4266e34 GKH |
49 | int i = 0; |
50 | int j = 0; | |
3e7ee490 | 51 | |
f4266e34 | 52 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
f6feebe0 | 53 | MonitorPage, MonitorPage->trigger_state); |
3e7ee490 | 54 | |
f4266e34 GKH |
55 | for (i = 0; i < 4; i++) |
56 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
f6feebe0 | 57 | MonitorPage->trigger_group[i].as_uint64); |
3e7ee490 | 58 | |
f4266e34 GKH |
59 | for (i = 0; i < 4; i++) { |
60 | for (j = 0; j < 32; j++) { | |
61 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
f6feebe0 | 62 | MonitorPage->latency[i][j]); |
3e7ee490 HJ |
63 | } |
64 | } | |
f4266e34 GKH |
65 | for (i = 0; i < 4; i++) { |
66 | for (j = 0; j < 32; j++) { | |
67 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
f6feebe0 | 68 | MonitorPage->parameter[i][j].connectionid.asu32); |
f4266e34 | 69 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, |
f6feebe0 | 70 | MonitorPage->parameter[i][j].flag_number); |
3e7ee490 HJ |
71 | } |
72 | } | |
73 | } | |
74 | #endif | |
75 | ||
3e189519 | 76 | /* |
fff41b2e | 77 | * vmbus_setevent- Trigger an event notification on the specified |
3e189519 | 78 | * channel. |
f4266e34 | 79 | */ |
fff41b2e | 80 | static void vmbus_setevent(struct vmbus_channel *channel) |
3e7ee490 | 81 | { |
39d70a4a | 82 | struct hv_monitor_page *monitorpage; |
3e7ee490 | 83 | |
c50f7fb2 | 84 | if (channel->offermsg.monitor_allocated) { |
454f18a9 | 85 | /* Each u32 represents 32 channels */ |
22356585 | 86 | sync_set_bit(channel->offermsg.child_relid & 31, |
da9fcb72 | 87 | (unsigned long *) vmbus_connection.send_int_page + |
c50f7fb2 | 88 | (channel->offermsg.child_relid >> 5)); |
3e7ee490 | 89 | |
da9fcb72 | 90 | monitorpage = vmbus_connection.monitor_pages; |
39d70a4a | 91 | monitorpage++; /* Get the child to parent monitor page */ |
3e7ee490 | 92 | |
22356585 | 93 | sync_set_bit(channel->monitor_bit, |
f6feebe0 HZ |
94 | (unsigned long *)&monitorpage->trigger_group |
95 | [channel->monitor_grp].pending); | |
7c369f40 | 96 | |
f4266e34 | 97 | } else { |
c6977677 | 98 | vmbus_set_event(channel->offermsg.child_relid); |
3e7ee490 | 99 | } |
3e7ee490 HJ |
100 | } |
101 | ||
102 | #if 0 | |
aded7165 | 103 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 104 | { |
eacb1b4d | 105 | struct hv_monitor_page *monitorPage; |
3e7ee490 | 106 | |
c50f7fb2 | 107 | if (Channel->offermsg.monitor_allocated) { |
454f18a9 | 108 | /* Each u32 represents 32 channels */ |
22356585 | 109 | sync_clear_bit(Channel->offermsg.child_relid & 31, |
da9fcb72 | 110 | (unsigned long *)vmbus_connection.send_int_page + |
c50f7fb2 | 111 | (Channel->offermsg.child_relid >> 5)); |
3e7ee490 | 112 | |
da9fcb72 HZ |
113 | monitorPage = (struct hv_monitor_page *) |
114 | vmbus_connection.monitor_pages; | |
454f18a9 | 115 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 116 | |
22356585 | 117 | sync_clear_bit(Channel->monitor_bit, |
f6feebe0 | 118 | (unsigned long *)&monitorPage->trigger_group |
c50f7fb2 | 119 | [Channel->monitor_grp].Pending); |
3e7ee490 | 120 | } |
3e7ee490 HJ |
121 | } |
122 | ||
123 | #endif | |
3e189519 | 124 | /* |
fff41b2e | 125 | * vmbus_get_debug_info -Retrieve various channel debug info |
f4266e34 | 126 | */ |
fff41b2e | 127 | void vmbus_get_debug_info(struct vmbus_channel *channel, |
39d70a4a | 128 | struct vmbus_channel_debug_info *debuginfo) |
3e7ee490 | 129 | { |
39d70a4a | 130 | struct hv_monitor_page *monitorpage; |
c50f7fb2 HZ |
131 | u8 monitor_group = (u8)channel->offermsg.monitorid / 32; |
132 | u8 monitor_offset = (u8)channel->offermsg.monitorid % 32; | |
454f18a9 | 133 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 | 134 | |
c50f7fb2 HZ |
135 | debuginfo->relid = channel->offermsg.child_relid; |
136 | debuginfo->state = channel->state; | |
137 | memcpy(&debuginfo->interfacetype, | |
767dff68 | 138 | &channel->offermsg.offer.if_type, sizeof(struct hv_guid)); |
c50f7fb2 | 139 | memcpy(&debuginfo->interface_instance, |
767dff68 | 140 | &channel->offermsg.offer.if_instance, |
f4266e34 | 141 | sizeof(struct hv_guid)); |
3e7ee490 | 142 | |
da9fcb72 | 143 | monitorpage = (struct hv_monitor_page *)vmbus_connection.monitor_pages; |
3e7ee490 | 144 | |
c50f7fb2 | 145 | debuginfo->monitorid = channel->offermsg.monitorid; |
3e7ee490 | 146 | |
c50f7fb2 | 147 | debuginfo->servermonitor_pending = |
f6feebe0 | 148 | monitorpage->trigger_group[monitor_group].pending; |
c50f7fb2 | 149 | debuginfo->servermonitor_latency = |
f6feebe0 | 150 | monitorpage->latency[monitor_group][monitor_offset]; |
c50f7fb2 | 151 | debuginfo->servermonitor_connectionid = |
f6feebe0 HZ |
152 | monitorpage->parameter[monitor_group] |
153 | [monitor_offset].connectionid.u.id; | |
3e7ee490 | 154 | |
39d70a4a | 155 | monitorpage++; |
3e7ee490 | 156 | |
c50f7fb2 | 157 | debuginfo->clientmonitor_pending = |
f6feebe0 | 158 | monitorpage->trigger_group[monitor_group].pending; |
c50f7fb2 | 159 | debuginfo->clientmonitor_latency = |
f6feebe0 | 160 | monitorpage->latency[monitor_group][monitor_offset]; |
c50f7fb2 | 161 | debuginfo->clientmonitor_connectionid = |
f6feebe0 HZ |
162 | monitorpage->parameter[monitor_group] |
163 | [monitor_offset].connectionid.u.id; | |
3e7ee490 | 164 | |
1ac58644 HZ |
165 | ringbuffer_get_debuginfo(&channel->inbound, &debuginfo->inbound); |
166 | ringbuffer_get_debuginfo(&channel->outbound, &debuginfo->outbound); | |
3e7ee490 HJ |
167 | } |
168 | ||
3e189519 | 169 | /* |
fff41b2e | 170 | * vmbus_open - Open the specified channel. |
f4266e34 | 171 | */ |
fff41b2e | 172 | int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, |
39d70a4a HZ |
173 | u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, |
174 | void (*onchannelcallback)(void *context), void *context) | |
3e7ee490 | 175 | { |
82250213 | 176 | struct vmbus_channel_open_channel *openMsg; |
b94ef345 | 177 | struct vmbus_channel_msginfo *openInfo = NULL; |
3e7ee490 | 178 | void *in, *out; |
dd0813b6 | 179 | unsigned long flags; |
c3bf2e26 | 180 | int ret, err = 0; |
3e7ee490 | 181 | |
454f18a9 | 182 | /* Aligned to page size */ |
0ace247e BP |
183 | /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */ |
184 | /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */ | |
3e7ee490 | 185 | |
c50f7fb2 HZ |
186 | newchannel->onchannel_callback = onchannelcallback; |
187 | newchannel->channel_callback_context = context; | |
3e7ee490 | 188 | |
454f18a9 | 189 | /* Allocate the ring buffer */ |
df3493e0 S |
190 | out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
191 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); | |
192 | ||
7e052d98 BP |
193 | if (!out) |
194 | return -ENOMEM; | |
195 | ||
0ace247e | 196 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 197 | |
39d70a4a | 198 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
3e7ee490 | 199 | |
c50f7fb2 HZ |
200 | newchannel->ringbuffer_pages = out; |
201 | newchannel->ringbuffer_pagecount = (send_ringbuffer_size + | |
39d70a4a | 202 | recv_ringbuffer_size) >> PAGE_SHIFT; |
3e7ee490 | 203 | |
1ac58644 | 204 | ret = ringbuffer_init(&newchannel->outbound, out, send_ringbuffer_size); |
fd4dc88e | 205 | if (ret != 0) { |
3324fb40 BP |
206 | err = ret; |
207 | goto errorout; | |
208 | } | |
209 | ||
1ac58644 | 210 | ret = ringbuffer_init(&newchannel->inbound, in, recv_ringbuffer_size); |
fd4dc88e | 211 | if (ret != 0) { |
3324fb40 BP |
212 | err = ret; |
213 | goto errorout; | |
214 | } | |
3e7ee490 | 215 | |
3e7ee490 | 216 | |
454f18a9 | 217 | /* Establish the gpadl for the ring buffer */ |
c50f7fb2 | 218 | newchannel->ringbuffer_gpadlhandle = 0; |
3e7ee490 | 219 | |
fff41b2e | 220 | ret = vmbus_establish_gpadl(newchannel, |
82f8bd40 | 221 | newchannel->outbound.ring_buffer, |
39d70a4a HZ |
222 | send_ringbuffer_size + |
223 | recv_ringbuffer_size, | |
c50f7fb2 | 224 | &newchannel->ringbuffer_gpadlhandle); |
b94ef345 | 225 | |
fd4dc88e | 226 | if (ret != 0) { |
b94ef345 BP |
227 | err = ret; |
228 | goto errorout; | |
229 | } | |
f4266e34 | 230 | |
454f18a9 | 231 | /* Create and init the channel open message */ |
f4266e34 GKH |
232 | openInfo = kmalloc(sizeof(*openInfo) + |
233 | sizeof(struct vmbus_channel_open_channel), | |
234 | GFP_KERNEL); | |
c3bf2e26 BP |
235 | if (!openInfo) { |
236 | err = -ENOMEM; | |
237 | goto errorout; | |
238 | } | |
3e7ee490 | 239 | |
0c3b7b2f | 240 | init_waitqueue_head(&openInfo->waitevent); |
3e7ee490 | 241 | |
c50f7fb2 HZ |
242 | openMsg = (struct vmbus_channel_open_channel *)openInfo->msg; |
243 | openMsg->header.msgtype = CHANNELMSG_OPENCHANNEL; | |
244 | openMsg->openid = newchannel->offermsg.child_relid; /* FIXME */ | |
245 | openMsg->child_relid = newchannel->offermsg.child_relid; | |
246 | openMsg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; | |
247 | openMsg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >> | |
f4266e34 | 248 | PAGE_SHIFT; |
c50f7fb2 | 249 | openMsg->server_contextarea_gpadlhandle = 0; /* TODO */ |
3e7ee490 | 250 | |
39d70a4a | 251 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
c827f944 BP |
252 | err = -EINVAL; |
253 | goto errorout; | |
254 | } | |
255 | ||
39d70a4a | 256 | if (userdatalen) |
c50f7fb2 | 257 | memcpy(openMsg->userdata, userdata, userdatalen); |
3e7ee490 | 258 | |
15b2f647 | 259 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 260 | list_add_tail(&openInfo->msglistentry, |
da9fcb72 | 261 | &vmbus_connection.chn_msg_list); |
15b2f647 | 262 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 263 | |
c6977677 | 264 | ret = vmbus_post_msg(openMsg, |
f4266e34 | 265 | sizeof(struct vmbus_channel_open_channel)); |
98e08702 HJ |
266 | |
267 | if (ret != 0) | |
3e7ee490 | 268 | goto Cleanup; |
3e7ee490 | 269 | |
0c3b7b2f S |
270 | openInfo->wait_condition = 0; |
271 | wait_event_timeout(openInfo->waitevent, | |
272 | openInfo->wait_condition, | |
273 | msecs_to_jiffies(1000)); | |
274 | if (openInfo->wait_condition == 0) { | |
275 | err = -ETIMEDOUT; | |
276 | goto errorout; | |
277 | } | |
278 | ||
3e7ee490 | 279 | |
98e08702 HJ |
280 | if (openInfo->response.open_result.status) |
281 | err = openInfo->response.open_result.status; | |
3e7ee490 HJ |
282 | |
283 | Cleanup: | |
15b2f647 | 284 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 285 | list_del(&openInfo->msglistentry); |
15b2f647 | 286 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 287 | |
8c69f52a | 288 | kfree(openInfo); |
98e08702 | 289 | return err; |
c3bf2e26 BP |
290 | |
291 | errorout: | |
1ac58644 HZ |
292 | ringbuffer_cleanup(&newchannel->outbound); |
293 | ringbuffer_cleanup(&newchannel->inbound); | |
df3493e0 S |
294 | free_pages((unsigned long)out, |
295 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); | |
c3bf2e26 BP |
296 | kfree(openInfo); |
297 | return err; | |
3e7ee490 | 298 | } |
36ceadfc | 299 | EXPORT_SYMBOL_GPL(vmbus_open); |
3e7ee490 | 300 | |
3e189519 | 301 | /* |
fff41b2e | 302 | * dump_gpadl_body - Dump the gpadl body message to the console for |
3e189519 | 303 | * debugging purposes. |
f4266e34 | 304 | */ |
fff41b2e | 305 | static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len) |
3e7ee490 | 306 | { |
f4266e34 | 307 | int i; |
39d70a4a | 308 | int pfncount; |
3e7ee490 | 309 | |
39d70a4a | 310 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
f4266e34 | 311 | sizeof(u64); |
98e08702 | 312 | |
39d70a4a | 313 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
3e7ee490 | 314 | |
39d70a4a | 315 | for (i = 0; i < pfncount; i++) |
f4266e34 | 316 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
c50f7fb2 | 317 | i, gpadl->pfn[i]); |
3e7ee490 HJ |
318 | } |
319 | ||
3e189519 | 320 | /* |
fff41b2e | 321 | * dump_gpadl_header - Dump the gpadl header message to the console for |
3e189519 | 322 | * debugging purposes. |
f4266e34 | 323 | */ |
fff41b2e | 324 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
3e7ee490 | 325 | { |
f4266e34 | 326 | int i, j; |
39d70a4a | 327 | int pagecount; |
3e7ee490 | 328 | |
f4266e34 GKH |
329 | DPRINT_DBG(VMBUS, |
330 | "gpadl header - relid %d, range count %d, range buflen %d", | |
c50f7fb2 HZ |
331 | gpadl->child_relid, gpadl->rangecount, gpadl->range_buflen); |
332 | for (i = 0; i < gpadl->rangecount; i++) { | |
415f2287 | 333 | pagecount = gpadl->range[i].byte_count >> PAGE_SHIFT; |
39d70a4a | 334 | pagecount = (pagecount > 26) ? 26 : pagecount; |
3e7ee490 | 335 | |
f4266e34 | 336 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
415f2287 HZ |
337 | "page count %d", i, gpadl->range[i].byte_count, |
338 | gpadl->range[i].byte_offset, pagecount); | |
3e7ee490 | 339 | |
39d70a4a | 340 | for (j = 0; j < pagecount; j++) |
f4266e34 | 341 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
415f2287 | 342 | gpadl->range[i].pfn_array[j]); |
3e7ee490 HJ |
343 | } |
344 | } | |
345 | ||
3e189519 | 346 | /* |
fff41b2e | 347 | * create_gpadl_header - Creates a gpadl for the specified buffer |
f4266e34 | 348 | */ |
fff41b2e | 349 | static int create_gpadl_header(void *kbuffer, u32 size, |
39d70a4a HZ |
350 | struct vmbus_channel_msginfo **msginfo, |
351 | u32 *messagecount) | |
3e7ee490 HJ |
352 | { |
353 | int i; | |
39d70a4a | 354 | int pagecount; |
f4266e34 | 355 | unsigned long long pfn; |
39d70a4a HZ |
356 | struct vmbus_channel_gpadl_header *gpadl_header; |
357 | struct vmbus_channel_gpadl_body *gpadl_body; | |
358 | struct vmbus_channel_msginfo *msgheader; | |
359 | struct vmbus_channel_msginfo *msgbody = NULL; | |
360 | u32 msgsize; | |
3e7ee490 | 361 | |
39d70a4a | 362 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
3e7ee490 | 363 | |
f4266e34 | 364 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 365 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 366 | |
39d70a4a HZ |
367 | pagecount = size >> PAGE_SHIFT; |
368 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; | |
3e7ee490 | 369 | |
454f18a9 | 370 | /* do we need a gpadl body msg */ |
39d70a4a | 371 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 GKH |
372 | sizeof(struct vmbus_channel_gpadl_header) - |
373 | sizeof(struct gpa_range); | |
39d70a4a | 374 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 375 | |
39d70a4a | 376 | if (pagecount > pfncount) { |
f4266e34 | 377 | /* we need a gpadl body */ |
454f18a9 | 378 | /* fill in the header */ |
39d70a4a | 379 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 380 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
381 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
382 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
383 | if (!msgheader) | |
d1c250bb | 384 | goto nomem; |
3e7ee490 | 385 | |
c50f7fb2 HZ |
386 | INIT_LIST_HEAD(&msgheader->submsglist); |
387 | msgheader->msgsize = msgsize; | |
3e7ee490 | 388 | |
39d70a4a | 389 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
c50f7fb2 HZ |
390 | msgheader->msg; |
391 | gpadl_header->rangecount = 1; | |
392 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 393 | pagecount * sizeof(u64); |
415f2287 HZ |
394 | gpadl_header->range[0].byte_offset = 0; |
395 | gpadl_header->range[0].byte_count = size; | |
39d70a4a | 396 | for (i = 0; i < pfncount; i++) |
415f2287 | 397 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
39d70a4a HZ |
398 | *msginfo = msgheader; |
399 | *messagecount = 1; | |
3e7ee490 | 400 | |
39d70a4a HZ |
401 | pfnsum = pfncount; |
402 | pfnleft = pagecount - pfncount; | |
3e7ee490 | 403 | |
454f18a9 | 404 | /* how many pfns can we fit */ |
39d70a4a | 405 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 | 406 | sizeof(struct vmbus_channel_gpadl_body); |
39d70a4a | 407 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 408 | |
454f18a9 | 409 | /* fill in the body */ |
39d70a4a HZ |
410 | while (pfnleft) { |
411 | if (pfnleft > pfncount) | |
412 | pfncurr = pfncount; | |
3e7ee490 | 413 | else |
39d70a4a | 414 | pfncurr = pfnleft; |
3e7ee490 | 415 | |
39d70a4a | 416 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 417 | sizeof(struct vmbus_channel_gpadl_body) + |
39d70a4a HZ |
418 | pfncurr * sizeof(u64); |
419 | msgbody = kzalloc(msgsize, GFP_KERNEL); | |
d1c250bb | 420 | /* FIXME: we probably need to more if this fails */ |
39d70a4a | 421 | if (!msgbody) |
d1c250bb | 422 | goto nomem; |
c50f7fb2 | 423 | msgbody->msgsize = msgsize; |
39d70a4a HZ |
424 | (*messagecount)++; |
425 | gpadl_body = | |
c50f7fb2 | 426 | (struct vmbus_channel_gpadl_body *)msgbody->msg; |
f4266e34 GKH |
427 | |
428 | /* | |
429 | * FIXME: | |
430 | * Gpadl is u32 and we are using a pointer which could | |
431 | * be 64-bit | |
432 | */ | |
39d70a4a HZ |
433 | /* gpadl_body->Gpadl = kbuffer; */ |
434 | for (i = 0; i < pfncurr; i++) | |
c50f7fb2 | 435 | gpadl_body->pfn[i] = pfn + pfnsum + i; |
3e7ee490 | 436 | |
454f18a9 | 437 | /* add to msg header */ |
c50f7fb2 HZ |
438 | list_add_tail(&msgbody->msglistentry, |
439 | &msgheader->submsglist); | |
39d70a4a HZ |
440 | pfnsum += pfncurr; |
441 | pfnleft -= pfncurr; | |
3e7ee490 | 442 | } |
f4266e34 | 443 | } else { |
454f18a9 | 444 | /* everything fits in a header */ |
39d70a4a | 445 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 446 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
447 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
448 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
449 | if (msgheader == NULL) | |
e3eb7cdd | 450 | goto nomem; |
c50f7fb2 | 451 | msgheader->msgsize = msgsize; |
39d70a4a HZ |
452 | |
453 | gpadl_header = (struct vmbus_channel_gpadl_header *) | |
c50f7fb2 HZ |
454 | msgheader->msg; |
455 | gpadl_header->rangecount = 1; | |
456 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 457 | pagecount * sizeof(u64); |
415f2287 HZ |
458 | gpadl_header->range[0].byte_offset = 0; |
459 | gpadl_header->range[0].byte_count = size; | |
39d70a4a | 460 | for (i = 0; i < pagecount; i++) |
415f2287 | 461 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
39d70a4a HZ |
462 | |
463 | *msginfo = msgheader; | |
464 | *messagecount = 1; | |
3e7ee490 HJ |
465 | } |
466 | ||
467 | return 0; | |
d1c250bb | 468 | nomem: |
39d70a4a HZ |
469 | kfree(msgheader); |
470 | kfree(msgbody); | |
d1c250bb | 471 | return -ENOMEM; |
3e7ee490 HJ |
472 | } |
473 | ||
3e189519 | 474 | /* |
fff41b2e | 475 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
f4266e34 | 476 | * |
39d70a4a HZ |
477 | * @channel: a channel |
478 | * @kbuffer: from kmalloc | |
479 | * @size: page-size multiple | |
480 | * @gpadl_handle: some funky thing | |
f4266e34 | 481 | */ |
fff41b2e | 482 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
39d70a4a | 483 | u32 size, u32 *gpadl_handle) |
3e7ee490 | 484 | { |
39d70a4a HZ |
485 | struct vmbus_channel_gpadl_header *gpadlmsg; |
486 | struct vmbus_channel_gpadl_body *gpadl_body; | |
82250213 | 487 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
39d70a4a HZ |
488 | struct vmbus_channel_msginfo *msginfo = NULL; |
489 | struct vmbus_channel_msginfo *submsginfo; | |
490 | u32 msgcount; | |
53af545b | 491 | struct list_head *curr; |
39d70a4a | 492 | u32 next_gpadl_handle; |
dd0813b6 | 493 | unsigned long flags; |
c3bf2e26 | 494 | int ret = 0; |
3e7ee490 | 495 | |
da9fcb72 HZ |
496 | next_gpadl_handle = atomic_read(&vmbus_connection.next_gpadl_handle); |
497 | atomic_inc(&vmbus_connection.next_gpadl_handle); | |
3e7ee490 | 498 | |
fff41b2e | 499 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
c3bf2e26 BP |
500 | if (ret) |
501 | return ret; | |
3e7ee490 | 502 | |
0c3b7b2f | 503 | init_waitqueue_head(&msginfo->waitevent); |
c3bf2e26 | 504 | |
c50f7fb2 HZ |
505 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg; |
506 | gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER; | |
507 | gpadlmsg->child_relid = channel->offermsg.child_relid; | |
508 | gpadlmsg->gpadl = next_gpadl_handle; | |
3e7ee490 | 509 | |
fff41b2e | 510 | dump_gpadl_header(gpadlmsg); |
3e7ee490 | 511 | |
15b2f647 | 512 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 513 | list_add_tail(&msginfo->msglistentry, |
da9fcb72 | 514 | &vmbus_connection.chn_msg_list); |
3e7ee490 | 515 | |
15b2f647 | 516 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 517 | |
0c3b7b2f | 518 | msginfo->wait_condition = 0; |
c6977677 | 519 | ret = vmbus_post_msg(gpadlmsg, msginfo->msgsize - |
39d70a4a | 520 | sizeof(*msginfo)); |
98e08702 | 521 | if (ret != 0) |
3e7ee490 | 522 | goto Cleanup; |
3e7ee490 | 523 | |
39d70a4a | 524 | if (msgcount > 1) { |
c50f7fb2 | 525 | list_for_each(curr, &msginfo->submsglist) { |
53af545b BP |
526 | |
527 | /* FIXME: should this use list_entry() instead ? */ | |
39d70a4a HZ |
528 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
529 | gpadl_body = | |
c50f7fb2 | 530 | (struct vmbus_channel_gpadl_body *)submsginfo->msg; |
3e7ee490 | 531 | |
c50f7fb2 HZ |
532 | gpadl_body->header.msgtype = |
533 | CHANNELMSG_GPADL_BODY; | |
534 | gpadl_body->gpadl = next_gpadl_handle; | |
3e7ee490 | 535 | |
c50f7fb2 | 536 | dump_gpadl_body(gpadl_body, submsginfo->msgsize - |
39d70a4a | 537 | sizeof(*submsginfo)); |
c6977677 | 538 | ret = vmbus_post_msg(gpadl_body, |
c50f7fb2 | 539 | submsginfo->msgsize - |
39d70a4a | 540 | sizeof(*submsginfo)); |
fd4dc88e | 541 | if (ret != 0) |
99259159 BP |
542 | goto Cleanup; |
543 | ||
3e7ee490 HJ |
544 | } |
545 | } | |
0c3b7b2f S |
546 | wait_event_timeout(msginfo->waitevent, |
547 | msginfo->wait_condition, | |
548 | msecs_to_jiffies(1000)); | |
549 | BUG_ON(msginfo->wait_condition == 0); | |
550 | ||
3e7ee490 | 551 | |
454f18a9 | 552 | /* At this point, we received the gpadl created msg */ |
c50f7fb2 | 553 | *gpadl_handle = gpadlmsg->gpadl; |
3e7ee490 HJ |
554 | |
555 | Cleanup: | |
15b2f647 | 556 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 557 | list_del(&msginfo->msglistentry); |
15b2f647 | 558 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 559 | |
39d70a4a | 560 | kfree(msginfo); |
3e7ee490 HJ |
561 | return ret; |
562 | } | |
98873724 | 563 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
3e7ee490 | 564 | |
3e189519 | 565 | /* |
fff41b2e | 566 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
f4266e34 | 567 | */ |
fff41b2e | 568 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
3e7ee490 | 569 | { |
82250213 | 570 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 571 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 572 | unsigned long flags; |
f4266e34 | 573 | int ret; |
3e7ee490 | 574 | |
39d70a4a | 575 | /* ASSERT(gpadl_handle != 0); */ |
3e7ee490 | 576 | |
f4266e34 GKH |
577 | info = kmalloc(sizeof(*info) + |
578 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
579 | if (!info) |
580 | return -ENOMEM; | |
3e7ee490 | 581 | |
0c3b7b2f | 582 | init_waitqueue_head(&info->waitevent); |
3e7ee490 | 583 | |
c50f7fb2 | 584 | msg = (struct vmbus_channel_gpadl_teardown *)info->msg; |
3e7ee490 | 585 | |
c50f7fb2 HZ |
586 | msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; |
587 | msg->child_relid = channel->offermsg.child_relid; | |
588 | msg->gpadl = gpadl_handle; | |
3e7ee490 | 589 | |
15b2f647 | 590 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 591 | list_add_tail(&info->msglistentry, |
da9fcb72 | 592 | &vmbus_connection.chn_msg_list); |
15b2f647 | 593 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
0c3b7b2f | 594 | info->wait_condition = 0; |
c6977677 | 595 | ret = vmbus_post_msg(msg, |
f4266e34 | 596 | sizeof(struct vmbus_channel_gpadl_teardown)); |
3e7ee490 | 597 | |
0c3b7b2f S |
598 | BUG_ON(ret != 0); |
599 | wait_event_timeout(info->waitevent, | |
600 | info->wait_condition, msecs_to_jiffies(1000)); | |
601 | BUG_ON(info->wait_condition == 0); | |
3e7ee490 | 602 | |
454f18a9 | 603 | /* Received a torndown response */ |
15b2f647 | 604 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 605 | list_del(&info->msglistentry); |
15b2f647 | 606 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 607 | |
8c69f52a | 608 | kfree(info); |
3e7ee490 HJ |
609 | return ret; |
610 | } | |
18726d7a | 611 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
3e7ee490 | 612 | |
3e189519 | 613 | /* |
fff41b2e | 614 | * vmbus_close - Close the specified channel |
f4266e34 | 615 | */ |
fff41b2e | 616 | void vmbus_close(struct vmbus_channel *channel) |
3e7ee490 | 617 | { |
82250213 | 618 | struct vmbus_channel_close_channel *msg; |
aded7165 | 619 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 620 | unsigned long flags; |
f4266e34 | 621 | int ret; |
3e7ee490 | 622 | |
454f18a9 | 623 | /* Stop callback and cancel the timer asap */ |
c50f7fb2 | 624 | channel->onchannel_callback = NULL; |
39d70a4a | 625 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 626 | |
454f18a9 | 627 | /* Send a closing message */ |
f4266e34 GKH |
628 | info = kmalloc(sizeof(*info) + |
629 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
630 | /* FIXME: can't do anything other than return here because the |
631 | * function is void */ | |
632 | if (!info) | |
633 | return; | |
3e7ee490 | 634 | |
3e7ee490 | 635 | |
c50f7fb2 HZ |
636 | msg = (struct vmbus_channel_close_channel *)info->msg; |
637 | msg->header.msgtype = CHANNELMSG_CLOSECHANNEL; | |
638 | msg->child_relid = channel->offermsg.child_relid; | |
3e7ee490 | 639 | |
c6977677 | 640 | ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_close_channel)); |
3e7ee490 | 641 | |
0c3b7b2f | 642 | BUG_ON(ret != 0); |
454f18a9 | 643 | /* Tear down the gpadl for the channel's ring buffer */ |
c50f7fb2 | 644 | if (channel->ringbuffer_gpadlhandle) |
fff41b2e | 645 | vmbus_teardown_gpadl(channel, |
c50f7fb2 | 646 | channel->ringbuffer_gpadlhandle); |
3e7ee490 | 647 | |
454f18a9 | 648 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 649 | |
454f18a9 | 650 | /* Cleanup the ring buffers for this channel */ |
1ac58644 HZ |
651 | ringbuffer_cleanup(&channel->outbound); |
652 | ringbuffer_cleanup(&channel->inbound); | |
3e7ee490 | 653 | |
df3493e0 S |
654 | free_pages((unsigned long)channel->ringbuffer_pages, |
655 | get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); | |
3e7ee490 | 656 | |
8c69f52a | 657 | kfree(info); |
3e7ee490 | 658 | |
454f18a9 BP |
659 | /* |
660 | * If we are closing the channel during an error path in | |
661 | * opening the channel, don't free the channel since the | |
662 | * caller will free the channel | |
663 | */ | |
664 | ||
c50f7fb2 | 665 | if (channel->state == CHANNEL_OPEN_STATE) { |
15b2f647 | 666 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
c50f7fb2 | 667 | list_del(&channel->listentry); |
15b2f647 | 668 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 669 | |
e98cb276 | 670 | free_channel(channel); |
3e7ee490 | 671 | } |
3e7ee490 | 672 | } |
70bfa307 | 673 | EXPORT_SYMBOL_GPL(vmbus_close); |
3e7ee490 | 674 | |
c88c4e4c | 675 | /** |
fff41b2e | 676 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
39d70a4a HZ |
677 | * @channel: Pointer to vmbus_channel structure. |
678 | * @buffer: Pointer to the buffer you want to receive the data into. | |
679 | * @bufferlen: Maximum size of what the the buffer will hold | |
680 | * @requestid: Identifier of the request | |
681 | * @type: Type of packet that is being send e.g. negotiate, time | |
c88c4e4c HJ |
682 | * packet etc. |
683 | * | |
39d70a4a | 684 | * Sends data in @buffer directly to hyper-v via the vmbus |
c88c4e4c HJ |
685 | * This will send the data unparsed to hyper-v. |
686 | * | |
687 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 688 | */ |
fff41b2e | 689 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
39d70a4a HZ |
690 | u32 bufferlen, u64 requestid, |
691 | enum vmbus_packet_type type, u32 flags) | |
3e7ee490 | 692 | { |
8dc0a06a | 693 | struct vmpacket_descriptor desc; |
39d70a4a | 694 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
73509681 | 695 | u32 packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
39d70a4a HZ |
696 | struct scatterlist bufferlist[3]; |
697 | u64 aligned_data = 0; | |
f4266e34 | 698 | int ret; |
3e7ee490 | 699 | |
fff41b2e | 700 | dump_vmbus_channel(channel); |
3e7ee490 | 701 | |
0ace247e | 702 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 703 | |
454f18a9 | 704 | /* Setup the descriptor */ |
415f2287 HZ |
705 | desc.type = type; /* VmbusPacketTypeDataInBand; */ |
706 | desc.flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 | 707 | /* in 8-bytes granularity */ |
415f2287 HZ |
708 | desc.offset8 = sizeof(struct vmpacket_descriptor) >> 3; |
709 | desc.len8 = (u16)(packetlen_aligned >> 3); | |
710 | desc.trans_id = requestid; | |
3e7ee490 | 711 | |
39d70a4a HZ |
712 | sg_init_table(bufferlist, 3); |
713 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); | |
714 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
715 | sg_set_buf(&bufferlist[2], &aligned_data, | |
716 | packetlen_aligned - packetlen); | |
3e7ee490 | 717 | |
1ac58644 | 718 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 719 | |
454f18a9 | 720 | /* TODO: We should determine if this is optional */ |
1ac58644 | 721 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 722 | vmbus_setevent(channel); |
3e7ee490 | 723 | |
3e7ee490 HJ |
724 | return ret; |
725 | } | |
fff41b2e | 726 | EXPORT_SYMBOL(vmbus_sendpacket); |
3e7ee490 | 727 | |
3e189519 | 728 | /* |
fff41b2e | 729 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
3e189519 | 730 | * packets using a GPADL Direct packet type. |
f4266e34 | 731 | */ |
fff41b2e | 732 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
733 | struct hv_page_buffer pagebuffers[], |
734 | u32 pagecount, void *buffer, u32 bufferlen, | |
735 | u64 requestid) | |
3e7ee490 | 736 | { |
f4266e34 GKH |
737 | int ret; |
738 | int i; | |
430a8e9a | 739 | struct vmbus_channel_packet_page_buffer desc; |
39d70a4a HZ |
740 | u32 descsize; |
741 | u32 packetlen; | |
742 | u32 packetlen_aligned; | |
743 | struct scatterlist bufferlist[3]; | |
744 | u64 aligned_data = 0; | |
3e7ee490 | 745 | |
39d70a4a | 746 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
002b53ea | 747 | return -EINVAL; |
3e7ee490 | 748 | |
fff41b2e | 749 | dump_vmbus_channel(channel); |
3e7ee490 | 750 | |
f4266e34 | 751 | /* |
430a8e9a | 752 | * Adjust the size down since vmbus_channel_packet_page_buffer is the |
f4266e34 GKH |
753 | * largest size we support |
754 | */ | |
39d70a4a HZ |
755 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
756 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * | |
f4266e34 | 757 | sizeof(struct hv_page_buffer)); |
39d70a4a | 758 | packetlen = descsize + bufferlen; |
73509681 | 759 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
3e7ee490 | 760 | |
0ace247e | 761 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 762 | |
454f18a9 | 763 | /* Setup the descriptor */ |
415f2287 | 764 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
430a8e9a | 765 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
39d70a4a HZ |
766 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
767 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
768 | desc.transactionid = requestid; | |
769 | desc.rangecount = pagecount; | |
770 | ||
771 | for (i = 0; i < pagecount; i++) { | |
ca623ad3 HZ |
772 | desc.range[i].len = pagebuffers[i].len; |
773 | desc.range[i].offset = pagebuffers[i].offset; | |
774 | desc.range[i].pfn = pagebuffers[i].pfn; | |
3e7ee490 HJ |
775 | } |
776 | ||
39d70a4a HZ |
777 | sg_init_table(bufferlist, 3); |
778 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
779 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
780 | sg_set_buf(&bufferlist[2], &aligned_data, | |
781 | packetlen_aligned - packetlen); | |
3e7ee490 | 782 | |
1ac58644 | 783 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 784 | |
454f18a9 | 785 | /* TODO: We should determine if this is optional */ |
1ac58644 | 786 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 787 | vmbus_setevent(channel); |
3e7ee490 | 788 | |
3e7ee490 HJ |
789 | return ret; |
790 | } | |
713efeb4 | 791 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); |
3e7ee490 | 792 | |
3e189519 | 793 | /* |
fff41b2e | 794 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
3e189519 | 795 | * using a GPADL Direct packet type. |
f4266e34 | 796 | */ |
fff41b2e | 797 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
798 | struct hv_multipage_buffer *multi_pagebuffer, |
799 | void *buffer, u32 bufferlen, u64 requestid) | |
3e7ee490 | 800 | { |
f4266e34 | 801 | int ret; |
430a8e9a | 802 | struct vmbus_channel_packet_multipage_buffer desc; |
39d70a4a HZ |
803 | u32 descsize; |
804 | u32 packetlen; | |
805 | u32 packetlen_aligned; | |
806 | struct scatterlist bufferlist[3]; | |
807 | u64 aligned_data = 0; | |
ca623ad3 HZ |
808 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, |
809 | multi_pagebuffer->len); | |
3e7ee490 | 810 | |
fff41b2e | 811 | dump_vmbus_channel(channel); |
3e7ee490 | 812 | |
39d70a4a | 813 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
002b53ea | 814 | return -EINVAL; |
3e7ee490 | 815 | |
f4266e34 | 816 | /* |
430a8e9a | 817 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
f4266e34 GKH |
818 | * the largest size we support |
819 | */ | |
39d70a4a HZ |
820 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
821 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * | |
f4266e34 | 822 | sizeof(u64)); |
39d70a4a | 823 | packetlen = descsize + bufferlen; |
73509681 | 824 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
3e7ee490 | 825 | |
0ace247e | 826 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 827 | |
454f18a9 | 828 | /* Setup the descriptor */ |
415f2287 | 829 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
430a8e9a | 830 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
39d70a4a HZ |
831 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
832 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
833 | desc.transactionid = requestid; | |
430a8e9a | 834 | desc.rangecount = 1; |
3e7ee490 | 835 | |
ca623ad3 HZ |
836 | desc.range.len = multi_pagebuffer->len; |
837 | desc.range.offset = multi_pagebuffer->offset; | |
3e7ee490 | 838 | |
ca623ad3 | 839 | memcpy(desc.range.pfn_array, multi_pagebuffer->pfn_array, |
39d70a4a | 840 | pfncount * sizeof(u64)); |
3e7ee490 | 841 | |
39d70a4a HZ |
842 | sg_init_table(bufferlist, 3); |
843 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
844 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
845 | sg_set_buf(&bufferlist[2], &aligned_data, | |
846 | packetlen_aligned - packetlen); | |
3e7ee490 | 847 | |
1ac58644 | 848 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 849 | |
454f18a9 | 850 | /* TODO: We should determine if this is optional */ |
1ac58644 | 851 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 852 | vmbus_setevent(channel); |
3e7ee490 | 853 | |
3e7ee490 HJ |
854 | return ret; |
855 | } | |
4cb106fa | 856 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
c88c4e4c HJ |
857 | |
858 | /** | |
fff41b2e | 859 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
39d70a4a HZ |
860 | * @channel: Pointer to vmbus_channel structure. |
861 | * @buffer: Pointer to the buffer you want to receive the data into. | |
862 | * @bufferlen: Maximum size of what the the buffer will hold | |
863 | * @buffer_actual_len: The actual size of the data after it was received | |
864 | * @requestid: Identifier of the request | |
c88c4e4c HJ |
865 | * |
866 | * Receives directly from the hyper-v vmbus and puts the data it received | |
867 | * into Buffer. This will receive the data unparsed from hyper-v. | |
868 | * | |
869 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 870 | */ |
fff41b2e | 871 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
39d70a4a | 872 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
3e7ee490 | 873 | { |
8dc0a06a | 874 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
875 | u32 packetlen; |
876 | u32 userlen; | |
3e7ee490 | 877 | int ret; |
54411c42 | 878 | unsigned long flags; |
3e7ee490 | 879 | |
39d70a4a HZ |
880 | *buffer_actual_len = 0; |
881 | *requestid = 0; | |
3e7ee490 | 882 | |
39d70a4a | 883 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 884 | |
1ac58644 | 885 | ret = ringbuffer_peek(&channel->inbound, &desc, |
f4266e34 GKH |
886 | sizeof(struct vmpacket_descriptor)); |
887 | if (ret != 0) { | |
39d70a4a | 888 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
889 | return 0; |
890 | } | |
891 | ||
454f18a9 | 892 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 893 | |
415f2287 HZ |
894 | packetlen = desc.len8 << 3; |
895 | userlen = packetlen - (desc.offset8 << 3); | |
454f18a9 | 896 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 897 | |
39d70a4a | 898 | *buffer_actual_len = userlen; |
3e7ee490 | 899 | |
39d70a4a HZ |
900 | if (userlen > bufferlen) { |
901 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 902 | |
0a46618d | 903 | pr_err("Buffer too small - got %d needs %d\n", |
39d70a4a | 904 | bufferlen, userlen); |
3e7ee490 HJ |
905 | return -1; |
906 | } | |
907 | ||
415f2287 | 908 | *requestid = desc.trans_id; |
3e7ee490 | 909 | |
454f18a9 | 910 | /* Copy over the packet to the user buffer */ |
1ac58644 | 911 | ret = ringbuffer_read(&channel->inbound, buffer, userlen, |
415f2287 | 912 | (desc.offset8 << 3)); |
3e7ee490 | 913 | |
39d70a4a | 914 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 915 | |
3e7ee490 HJ |
916 | return 0; |
917 | } | |
fff41b2e | 918 | EXPORT_SYMBOL(vmbus_recvpacket); |
3e7ee490 | 919 | |
3e189519 | 920 | /* |
fff41b2e | 921 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
f4266e34 | 922 | */ |
fff41b2e | 923 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
39d70a4a HZ |
924 | u32 bufferlen, u32 *buffer_actual_len, |
925 | u64 *requestid) | |
3e7ee490 | 926 | { |
8dc0a06a | 927 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
928 | u32 packetlen; |
929 | u32 userlen; | |
3e7ee490 | 930 | int ret; |
54411c42 | 931 | unsigned long flags; |
3e7ee490 | 932 | |
39d70a4a HZ |
933 | *buffer_actual_len = 0; |
934 | *requestid = 0; | |
3e7ee490 | 935 | |
39d70a4a | 936 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 937 | |
1ac58644 | 938 | ret = ringbuffer_peek(&channel->inbound, &desc, |
f4266e34 GKH |
939 | sizeof(struct vmpacket_descriptor)); |
940 | if (ret != 0) { | |
39d70a4a | 941 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
942 | return 0; |
943 | } | |
944 | ||
454f18a9 | 945 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 946 | |
415f2287 HZ |
947 | packetlen = desc.len8 << 3; |
948 | userlen = packetlen - (desc.offset8 << 3); | |
3e7ee490 | 949 | |
39d70a4a | 950 | *buffer_actual_len = packetlen; |
3e7ee490 | 951 | |
39d70a4a HZ |
952 | if (packetlen > bufferlen) { |
953 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 954 | |
0a46618d HJ |
955 | pr_err("Buffer too small - needed %d bytes but " |
956 | "got space for only %d bytes\n", | |
957 | packetlen, bufferlen); | |
3e7ee490 HJ |
958 | return -2; |
959 | } | |
960 | ||
415f2287 | 961 | *requestid = desc.trans_id; |
3e7ee490 | 962 | |
454f18a9 | 963 | /* Copy over the entire packet to the user buffer */ |
1ac58644 | 964 | ret = ringbuffer_read(&channel->inbound, buffer, packetlen, 0); |
3e7ee490 | 965 | |
39d70a4a | 966 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
967 | return 0; |
968 | } | |
adaee6bd | 969 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
3e7ee490 | 970 | |
3e189519 | 971 | /* |
fff41b2e | 972 | * vmbus_onchannel_event - Channel event callback |
f4266e34 | 973 | */ |
fff41b2e | 974 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
3e7ee490 | 975 | { |
fff41b2e | 976 | dump_vmbus_channel(channel); |
0ace247e | 977 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 978 | |
c50f7fb2 | 979 | channel->onchannel_callback(channel->channel_callback_context); |
5996b3dd | 980 | |
39d70a4a | 981 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
3e7ee490 HJ |
982 | } |
983 | ||
3e189519 | 984 | /* |
fff41b2e | 985 | * vmbus_ontimer - Timer event callback |
f4266e34 | 986 | */ |
fff41b2e | 987 | void vmbus_ontimer(unsigned long data) |
3e7ee490 | 988 | { |
aded7165 | 989 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 990 | |
c50f7fb2 HZ |
991 | if (channel->onchannel_callback) |
992 | channel->onchannel_callback(channel->channel_callback_context); | |
3e7ee490 HJ |
993 | } |
994 | ||
3e189519 | 995 | /* |
fff41b2e | 996 | * dump_vmbus_channel- Dump vmbus channel info to the console |
f4266e34 | 997 | */ |
fff41b2e | 998 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
3e7ee490 | 999 | { |
c50f7fb2 | 1000 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->offermsg.child_relid); |
1ac58644 HZ |
1001 | dump_ring_info(&channel->outbound, "Outbound "); |
1002 | dump_ring_info(&channel->inbound, "Inbound "); | |
3e7ee490 | 1003 | } |