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 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
a0086dc5 | 22 | #include <linux/mm.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
c88c4e4c | 24 | #include <linux/module.h> |
4983b39a | 25 | #include "osd.h" |
645954c5 | 26 | #include "logging.h" |
72daf320 | 27 | #include "vmbus_private.h" |
3e7ee490 | 28 | |
454f18a9 | 29 | /* Internal routines */ |
fff41b2e | 30 | static int create_gpadl_header( |
39d70a4a HZ |
31 | void *kbuffer, /* must be phys and virt contiguous */ |
32 | u32 size, /* page-size multiple */ | |
33 | struct vmbus_channel_msginfo **msginfo, | |
34 | u32 *messagecount); | |
fff41b2e HZ |
35 | static void dump_vmbus_channel(struct vmbus_channel *channel); |
36 | static void vmbus_setevent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
37 | |
38 | ||
39 | #if 0 | |
f4266e34 | 40 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 41 | { |
f4266e34 GKH |
42 | int i = 0; |
43 | int j = 0; | |
3e7ee490 | 44 | |
f4266e34 | 45 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
f6feebe0 | 46 | MonitorPage, MonitorPage->trigger_state); |
3e7ee490 | 47 | |
f4266e34 GKH |
48 | for (i = 0; i < 4; i++) |
49 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
f6feebe0 | 50 | MonitorPage->trigger_group[i].as_uint64); |
3e7ee490 | 51 | |
f4266e34 GKH |
52 | for (i = 0; i < 4; i++) { |
53 | for (j = 0; j < 32; j++) { | |
54 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
f6feebe0 | 55 | MonitorPage->latency[i][j]); |
3e7ee490 HJ |
56 | } |
57 | } | |
f4266e34 GKH |
58 | for (i = 0; i < 4; i++) { |
59 | for (j = 0; j < 32; j++) { | |
60 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
f6feebe0 | 61 | MonitorPage->parameter[i][j].connectionid.asu32); |
f4266e34 | 62 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, |
f6feebe0 | 63 | MonitorPage->parameter[i][j].flag_number); |
3e7ee490 HJ |
64 | } |
65 | } | |
66 | } | |
67 | #endif | |
68 | ||
3e189519 | 69 | /* |
fff41b2e | 70 | * vmbus_setevent- Trigger an event notification on the specified |
3e189519 | 71 | * channel. |
f4266e34 | 72 | */ |
fff41b2e | 73 | static void vmbus_setevent(struct vmbus_channel *channel) |
3e7ee490 | 74 | { |
39d70a4a | 75 | struct hv_monitor_page *monitorpage; |
3e7ee490 | 76 | |
c50f7fb2 | 77 | if (channel->offermsg.monitor_allocated) { |
454f18a9 | 78 | /* Each u32 represents 32 channels */ |
c50f7fb2 | 79 | set_bit(channel->offermsg.child_relid & 31, |
7c369f40 | 80 | (unsigned long *) gVmbusConnection.SendInterruptPage + |
c50f7fb2 | 81 | (channel->offermsg.child_relid >> 5)); |
3e7ee490 | 82 | |
39d70a4a HZ |
83 | monitorpage = gVmbusConnection.MonitorPages; |
84 | monitorpage++; /* Get the child to parent monitor page */ | |
3e7ee490 | 85 | |
c50f7fb2 | 86 | set_bit(channel->monitor_bit, |
f6feebe0 HZ |
87 | (unsigned long *)&monitorpage->trigger_group |
88 | [channel->monitor_grp].pending); | |
7c369f40 | 89 | |
f4266e34 | 90 | } else { |
c50f7fb2 | 91 | VmbusSetEvent(channel->offermsg.child_relid); |
3e7ee490 | 92 | } |
3e7ee490 HJ |
93 | } |
94 | ||
95 | #if 0 | |
aded7165 | 96 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 97 | { |
eacb1b4d | 98 | struct hv_monitor_page *monitorPage; |
3e7ee490 | 99 | |
c50f7fb2 | 100 | if (Channel->offermsg.monitor_allocated) { |
454f18a9 | 101 | /* Each u32 represents 32 channels */ |
c50f7fb2 | 102 | clear_bit(Channel->offermsg.child_relid & 31, |
f4266e34 | 103 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
c50f7fb2 | 104 | (Channel->offermsg.child_relid >> 5)); |
3e7ee490 | 105 | |
f4266e34 GKH |
106 | monitorPage = |
107 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; | |
454f18a9 | 108 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 109 | |
c50f7fb2 | 110 | clear_bit(Channel->monitor_bit, |
f6feebe0 | 111 | (unsigned long *)&monitorPage->trigger_group |
c50f7fb2 | 112 | [Channel->monitor_grp].Pending); |
3e7ee490 | 113 | } |
3e7ee490 HJ |
114 | } |
115 | ||
116 | #endif | |
3e189519 | 117 | /* |
fff41b2e | 118 | * vmbus_get_debug_info -Retrieve various channel debug info |
f4266e34 | 119 | */ |
fff41b2e | 120 | void vmbus_get_debug_info(struct vmbus_channel *channel, |
39d70a4a | 121 | struct vmbus_channel_debug_info *debuginfo) |
3e7ee490 | 122 | { |
39d70a4a | 123 | struct hv_monitor_page *monitorpage; |
c50f7fb2 HZ |
124 | u8 monitor_group = (u8)channel->offermsg.monitorid / 32; |
125 | u8 monitor_offset = (u8)channel->offermsg.monitorid % 32; | |
454f18a9 | 126 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 | 127 | |
c50f7fb2 HZ |
128 | debuginfo->relid = channel->offermsg.child_relid; |
129 | debuginfo->state = channel->state; | |
130 | memcpy(&debuginfo->interfacetype, | |
131 | &channel->offermsg.offer.InterfaceType, sizeof(struct hv_guid)); | |
132 | memcpy(&debuginfo->interface_instance, | |
133 | &channel->offermsg.offer.InterfaceInstance, | |
f4266e34 | 134 | sizeof(struct hv_guid)); |
3e7ee490 | 135 | |
39d70a4a | 136 | monitorpage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 | 137 | |
c50f7fb2 | 138 | debuginfo->monitorid = channel->offermsg.monitorid; |
3e7ee490 | 139 | |
c50f7fb2 | 140 | debuginfo->servermonitor_pending = |
f6feebe0 | 141 | monitorpage->trigger_group[monitor_group].pending; |
c50f7fb2 | 142 | debuginfo->servermonitor_latency = |
f6feebe0 | 143 | monitorpage->latency[monitor_group][monitor_offset]; |
c50f7fb2 | 144 | debuginfo->servermonitor_connectionid = |
f6feebe0 HZ |
145 | monitorpage->parameter[monitor_group] |
146 | [monitor_offset].connectionid.u.id; | |
3e7ee490 | 147 | |
39d70a4a | 148 | monitorpage++; |
3e7ee490 | 149 | |
c50f7fb2 | 150 | debuginfo->clientmonitor_pending = |
f6feebe0 | 151 | monitorpage->trigger_group[monitor_group].pending; |
c50f7fb2 | 152 | debuginfo->clientmonitor_latency = |
f6feebe0 | 153 | monitorpage->latency[monitor_group][monitor_offset]; |
c50f7fb2 | 154 | debuginfo->clientmonitor_connectionid = |
f6feebe0 HZ |
155 | monitorpage->parameter[monitor_group] |
156 | [monitor_offset].connectionid.u.id; | |
3e7ee490 | 157 | |
c50f7fb2 HZ |
158 | RingBufferGetDebugInfo(&channel->inbound, &debuginfo->inbound); |
159 | RingBufferGetDebugInfo(&channel->outbound, &debuginfo->outbound); | |
3e7ee490 HJ |
160 | } |
161 | ||
3e189519 | 162 | /* |
fff41b2e | 163 | * vmbus_open - Open the specified channel. |
f4266e34 | 164 | */ |
fff41b2e | 165 | int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, |
39d70a4a HZ |
166 | u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, |
167 | void (*onchannelcallback)(void *context), void *context) | |
3e7ee490 | 168 | { |
82250213 | 169 | struct vmbus_channel_open_channel *openMsg; |
b94ef345 | 170 | struct vmbus_channel_msginfo *openInfo = NULL; |
3e7ee490 | 171 | void *in, *out; |
dd0813b6 | 172 | unsigned long flags; |
c3bf2e26 | 173 | int ret, err = 0; |
3e7ee490 | 174 | |
454f18a9 | 175 | /* Aligned to page size */ |
0ace247e BP |
176 | /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */ |
177 | /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */ | |
3e7ee490 | 178 | |
c50f7fb2 HZ |
179 | newchannel->onchannel_callback = onchannelcallback; |
180 | newchannel->channel_callback_context = context; | |
3e7ee490 | 181 | |
454f18a9 | 182 | /* Allocate the ring buffer */ |
203df82d | 183 | out = osd_page_alloc((send_ringbuffer_size + recv_ringbuffer_size) |
f4266e34 | 184 | >> PAGE_SHIFT); |
7e052d98 BP |
185 | if (!out) |
186 | return -ENOMEM; | |
187 | ||
0ace247e | 188 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 189 | |
39d70a4a | 190 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
3e7ee490 | 191 | |
c50f7fb2 HZ |
192 | newchannel->ringbuffer_pages = out; |
193 | newchannel->ringbuffer_pagecount = (send_ringbuffer_size + | |
39d70a4a | 194 | recv_ringbuffer_size) >> PAGE_SHIFT; |
3e7ee490 | 195 | |
c50f7fb2 | 196 | ret = RingBufferInit(&newchannel->outbound, out, send_ringbuffer_size); |
fd4dc88e | 197 | if (ret != 0) { |
3324fb40 BP |
198 | err = ret; |
199 | goto errorout; | |
200 | } | |
201 | ||
c50f7fb2 | 202 | ret = RingBufferInit(&newchannel->inbound, in, recv_ringbuffer_size); |
fd4dc88e | 203 | if (ret != 0) { |
3324fb40 BP |
204 | err = ret; |
205 | goto errorout; | |
206 | } | |
3e7ee490 | 207 | |
3e7ee490 | 208 | |
454f18a9 | 209 | /* Establish the gpadl for the ring buffer */ |
f4266e34 | 210 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
39d70a4a | 211 | newchannel); |
3e7ee490 | 212 | |
c50f7fb2 | 213 | newchannel->ringbuffer_gpadlhandle = 0; |
3e7ee490 | 214 | |
fff41b2e | 215 | ret = vmbus_establish_gpadl(newchannel, |
82f8bd40 | 216 | newchannel->outbound.ring_buffer, |
39d70a4a HZ |
217 | send_ringbuffer_size + |
218 | recv_ringbuffer_size, | |
c50f7fb2 | 219 | &newchannel->ringbuffer_gpadlhandle); |
b94ef345 | 220 | |
fd4dc88e | 221 | if (ret != 0) { |
b94ef345 BP |
222 | err = ret; |
223 | goto errorout; | |
224 | } | |
f4266e34 GKH |
225 | |
226 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
227 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
c50f7fb2 HZ |
228 | newchannel, newchannel->offermsg.child_relid, |
229 | newchannel->ringbuffer_gpadlhandle, | |
82f8bd40 HZ |
230 | newchannel->outbound.ring_buffer, |
231 | newchannel->outbound.ring_size, | |
232 | newchannel->inbound.ring_buffer, | |
233 | newchannel->inbound.ring_size, | |
39d70a4a | 234 | send_ringbuffer_size); |
3e7ee490 | 235 | |
454f18a9 | 236 | /* Create and init the channel open message */ |
f4266e34 GKH |
237 | openInfo = kmalloc(sizeof(*openInfo) + |
238 | sizeof(struct vmbus_channel_open_channel), | |
239 | GFP_KERNEL); | |
c3bf2e26 BP |
240 | if (!openInfo) { |
241 | err = -ENOMEM; | |
242 | goto errorout; | |
243 | } | |
3e7ee490 | 244 | |
203df82d | 245 | openInfo->waitevent = osd_waitevent_create(); |
c50f7fb2 | 246 | if (!openInfo->waitevent) { |
c3bf2e26 BP |
247 | err = -ENOMEM; |
248 | goto errorout; | |
249 | } | |
3e7ee490 | 250 | |
c50f7fb2 HZ |
251 | openMsg = (struct vmbus_channel_open_channel *)openInfo->msg; |
252 | openMsg->header.msgtype = CHANNELMSG_OPENCHANNEL; | |
253 | openMsg->openid = newchannel->offermsg.child_relid; /* FIXME */ | |
254 | openMsg->child_relid = newchannel->offermsg.child_relid; | |
255 | openMsg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; | |
256 | openMsg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >> | |
f4266e34 | 257 | PAGE_SHIFT; |
c50f7fb2 | 258 | openMsg->server_contextarea_gpadlhandle = 0; /* TODO */ |
3e7ee490 | 259 | |
39d70a4a | 260 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
c827f944 BP |
261 | err = -EINVAL; |
262 | goto errorout; | |
263 | } | |
264 | ||
39d70a4a | 265 | if (userdatalen) |
c50f7fb2 | 266 | memcpy(openMsg->userdata, userdata, userdatalen); |
3e7ee490 | 267 | |
dd0813b6 | 268 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
c50f7fb2 | 269 | list_add_tail(&openInfo->msglistentry, |
53af545b | 270 | &gVmbusConnection.ChannelMsgList); |
dd0813b6 | 271 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
272 | |
273 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
274 | ||
f4266e34 GKH |
275 | ret = VmbusPostMessage(openMsg, |
276 | sizeof(struct vmbus_channel_open_channel)); | |
277 | if (ret != 0) { | |
3e7ee490 HJ |
278 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
279 | goto Cleanup; | |
280 | } | |
281 | ||
454f18a9 | 282 | /* FIXME: Need to time-out here */ |
203df82d | 283 | osd_waitevent_wait(openInfo->waitevent); |
3e7ee490 | 284 | |
c50f7fb2 | 285 | if (openInfo->response.open_result.status == 0) |
39d70a4a | 286 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", newchannel); |
3e7ee490 | 287 | else |
f4266e34 | 288 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
c50f7fb2 | 289 | newchannel, openInfo->response.open_result.status); |
3e7ee490 HJ |
290 | |
291 | Cleanup: | |
dd0813b6 | 292 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
c50f7fb2 | 293 | list_del(&openInfo->msglistentry); |
dd0813b6 | 294 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 295 | |
c50f7fb2 | 296 | kfree(openInfo->waitevent); |
8c69f52a | 297 | kfree(openInfo); |
3e7ee490 | 298 | return 0; |
c3bf2e26 BP |
299 | |
300 | errorout: | |
c50f7fb2 HZ |
301 | RingBufferCleanup(&newchannel->outbound); |
302 | RingBufferCleanup(&newchannel->inbound); | |
203df82d | 303 | osd_page_free(out, (send_ringbuffer_size + recv_ringbuffer_size) |
c3bf2e26 BP |
304 | >> PAGE_SHIFT); |
305 | kfree(openInfo); | |
306 | return err; | |
3e7ee490 | 307 | } |
36ceadfc | 308 | EXPORT_SYMBOL_GPL(vmbus_open); |
3e7ee490 | 309 | |
3e189519 | 310 | /* |
fff41b2e | 311 | * dump_gpadl_body - Dump the gpadl body message to the console for |
3e189519 | 312 | * debugging purposes. |
f4266e34 | 313 | */ |
fff41b2e | 314 | static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len) |
3e7ee490 | 315 | { |
f4266e34 | 316 | int i; |
39d70a4a | 317 | int pfncount; |
3e7ee490 | 318 | |
39d70a4a | 319 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
f4266e34 | 320 | sizeof(u64); |
39d70a4a | 321 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
3e7ee490 | 322 | |
39d70a4a | 323 | for (i = 0; i < pfncount; i++) |
f4266e34 | 324 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
c50f7fb2 | 325 | i, gpadl->pfn[i]); |
3e7ee490 HJ |
326 | } |
327 | ||
3e189519 | 328 | /* |
fff41b2e | 329 | * dump_gpadl_header - Dump the gpadl header message to the console for |
3e189519 | 330 | * debugging purposes. |
f4266e34 | 331 | */ |
fff41b2e | 332 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
3e7ee490 | 333 | { |
f4266e34 | 334 | int i, j; |
39d70a4a | 335 | int pagecount; |
3e7ee490 | 336 | |
f4266e34 GKH |
337 | DPRINT_DBG(VMBUS, |
338 | "gpadl header - relid %d, range count %d, range buflen %d", | |
c50f7fb2 HZ |
339 | gpadl->child_relid, gpadl->rangecount, gpadl->range_buflen); |
340 | for (i = 0; i < gpadl->rangecount; i++) { | |
341 | pagecount = gpadl->range[i].ByteCount >> PAGE_SHIFT; | |
39d70a4a | 342 | pagecount = (pagecount > 26) ? 26 : pagecount; |
3e7ee490 | 343 | |
f4266e34 | 344 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
c50f7fb2 HZ |
345 | "page count %d", i, gpadl->range[i].ByteCount, |
346 | gpadl->range[i].ByteOffset, pagecount); | |
3e7ee490 | 347 | |
39d70a4a | 348 | for (j = 0; j < pagecount; j++) |
f4266e34 | 349 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
c50f7fb2 | 350 | gpadl->range[i].PfnArray[j]); |
3e7ee490 HJ |
351 | } |
352 | } | |
353 | ||
3e189519 | 354 | /* |
fff41b2e | 355 | * create_gpadl_header - Creates a gpadl for the specified buffer |
f4266e34 | 356 | */ |
fff41b2e | 357 | static int create_gpadl_header(void *kbuffer, u32 size, |
39d70a4a HZ |
358 | struct vmbus_channel_msginfo **msginfo, |
359 | u32 *messagecount) | |
3e7ee490 HJ |
360 | { |
361 | int i; | |
39d70a4a | 362 | int pagecount; |
f4266e34 | 363 | unsigned long long pfn; |
39d70a4a HZ |
364 | struct vmbus_channel_gpadl_header *gpadl_header; |
365 | struct vmbus_channel_gpadl_body *gpadl_body; | |
366 | struct vmbus_channel_msginfo *msgheader; | |
367 | struct vmbus_channel_msginfo *msgbody = NULL; | |
368 | u32 msgsize; | |
3e7ee490 | 369 | |
39d70a4a | 370 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
3e7ee490 | 371 | |
f4266e34 | 372 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 373 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 374 | |
39d70a4a HZ |
375 | pagecount = size >> PAGE_SHIFT; |
376 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; | |
3e7ee490 | 377 | |
454f18a9 | 378 | /* do we need a gpadl body msg */ |
39d70a4a | 379 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 GKH |
380 | sizeof(struct vmbus_channel_gpadl_header) - |
381 | sizeof(struct gpa_range); | |
39d70a4a | 382 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 383 | |
39d70a4a | 384 | if (pagecount > pfncount) { |
f4266e34 | 385 | /* we need a gpadl body */ |
454f18a9 | 386 | /* fill in the header */ |
39d70a4a | 387 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 388 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
389 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
390 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
391 | if (!msgheader) | |
d1c250bb | 392 | goto nomem; |
3e7ee490 | 393 | |
c50f7fb2 HZ |
394 | INIT_LIST_HEAD(&msgheader->submsglist); |
395 | msgheader->msgsize = msgsize; | |
3e7ee490 | 396 | |
39d70a4a | 397 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
c50f7fb2 HZ |
398 | msgheader->msg; |
399 | gpadl_header->rangecount = 1; | |
400 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 401 | pagecount * sizeof(u64); |
c50f7fb2 HZ |
402 | gpadl_header->range[0].ByteOffset = 0; |
403 | gpadl_header->range[0].ByteCount = size; | |
39d70a4a | 404 | for (i = 0; i < pfncount; i++) |
c50f7fb2 | 405 | gpadl_header->range[0].PfnArray[i] = pfn+i; |
39d70a4a HZ |
406 | *msginfo = msgheader; |
407 | *messagecount = 1; | |
3e7ee490 | 408 | |
39d70a4a HZ |
409 | pfnsum = pfncount; |
410 | pfnleft = pagecount - pfncount; | |
3e7ee490 | 411 | |
454f18a9 | 412 | /* how many pfns can we fit */ |
39d70a4a | 413 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 | 414 | sizeof(struct vmbus_channel_gpadl_body); |
39d70a4a | 415 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 416 | |
454f18a9 | 417 | /* fill in the body */ |
39d70a4a HZ |
418 | while (pfnleft) { |
419 | if (pfnleft > pfncount) | |
420 | pfncurr = pfncount; | |
3e7ee490 | 421 | else |
39d70a4a | 422 | pfncurr = pfnleft; |
3e7ee490 | 423 | |
39d70a4a | 424 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 425 | sizeof(struct vmbus_channel_gpadl_body) + |
39d70a4a HZ |
426 | pfncurr * sizeof(u64); |
427 | msgbody = kzalloc(msgsize, GFP_KERNEL); | |
d1c250bb | 428 | /* FIXME: we probably need to more if this fails */ |
39d70a4a | 429 | if (!msgbody) |
d1c250bb | 430 | goto nomem; |
c50f7fb2 | 431 | msgbody->msgsize = msgsize; |
39d70a4a HZ |
432 | (*messagecount)++; |
433 | gpadl_body = | |
c50f7fb2 | 434 | (struct vmbus_channel_gpadl_body *)msgbody->msg; |
f4266e34 GKH |
435 | |
436 | /* | |
437 | * FIXME: | |
438 | * Gpadl is u32 and we are using a pointer which could | |
439 | * be 64-bit | |
440 | */ | |
39d70a4a HZ |
441 | /* gpadl_body->Gpadl = kbuffer; */ |
442 | for (i = 0; i < pfncurr; i++) | |
c50f7fb2 | 443 | gpadl_body->pfn[i] = pfn + pfnsum + i; |
3e7ee490 | 444 | |
454f18a9 | 445 | /* add to msg header */ |
c50f7fb2 HZ |
446 | list_add_tail(&msgbody->msglistentry, |
447 | &msgheader->submsglist); | |
39d70a4a HZ |
448 | pfnsum += pfncurr; |
449 | pfnleft -= pfncurr; | |
3e7ee490 | 450 | } |
f4266e34 | 451 | } else { |
454f18a9 | 452 | /* everything fits in a header */ |
39d70a4a | 453 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 454 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
455 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
456 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
457 | if (msgheader == NULL) | |
e3eb7cdd | 458 | goto nomem; |
c50f7fb2 | 459 | msgheader->msgsize = msgsize; |
39d70a4a HZ |
460 | |
461 | gpadl_header = (struct vmbus_channel_gpadl_header *) | |
c50f7fb2 HZ |
462 | msgheader->msg; |
463 | gpadl_header->rangecount = 1; | |
464 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 465 | pagecount * sizeof(u64); |
c50f7fb2 HZ |
466 | gpadl_header->range[0].ByteOffset = 0; |
467 | gpadl_header->range[0].ByteCount = size; | |
39d70a4a | 468 | for (i = 0; i < pagecount; i++) |
c50f7fb2 | 469 | gpadl_header->range[0].PfnArray[i] = pfn+i; |
39d70a4a HZ |
470 | |
471 | *msginfo = msgheader; | |
472 | *messagecount = 1; | |
3e7ee490 HJ |
473 | } |
474 | ||
475 | return 0; | |
d1c250bb | 476 | nomem: |
39d70a4a HZ |
477 | kfree(msgheader); |
478 | kfree(msgbody); | |
d1c250bb | 479 | return -ENOMEM; |
3e7ee490 HJ |
480 | } |
481 | ||
3e189519 | 482 | /* |
fff41b2e | 483 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
f4266e34 | 484 | * |
39d70a4a HZ |
485 | * @channel: a channel |
486 | * @kbuffer: from kmalloc | |
487 | * @size: page-size multiple | |
488 | * @gpadl_handle: some funky thing | |
f4266e34 | 489 | */ |
fff41b2e | 490 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
39d70a4a | 491 | u32 size, u32 *gpadl_handle) |
3e7ee490 | 492 | { |
39d70a4a HZ |
493 | struct vmbus_channel_gpadl_header *gpadlmsg; |
494 | struct vmbus_channel_gpadl_body *gpadl_body; | |
82250213 | 495 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
39d70a4a HZ |
496 | struct vmbus_channel_msginfo *msginfo = NULL; |
497 | struct vmbus_channel_msginfo *submsginfo; | |
498 | u32 msgcount; | |
53af545b | 499 | struct list_head *curr; |
39d70a4a | 500 | u32 next_gpadl_handle; |
dd0813b6 | 501 | unsigned long flags; |
c3bf2e26 | 502 | int ret = 0; |
3e7ee490 | 503 | |
39d70a4a | 504 | next_gpadl_handle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
f4888417 | 505 | atomic_inc(&gVmbusConnection.NextGpadlHandle); |
3e7ee490 | 506 | |
fff41b2e | 507 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
c3bf2e26 BP |
508 | if (ret) |
509 | return ret; | |
3e7ee490 | 510 | |
203df82d | 511 | msginfo->waitevent = osd_waitevent_create(); |
c50f7fb2 | 512 | if (!msginfo->waitevent) { |
c3bf2e26 BP |
513 | ret = -ENOMEM; |
514 | goto Cleanup; | |
515 | } | |
516 | ||
c50f7fb2 HZ |
517 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg; |
518 | gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER; | |
519 | gpadlmsg->child_relid = channel->offermsg.child_relid; | |
520 | gpadlmsg->gpadl = next_gpadl_handle; | |
3e7ee490 | 521 | |
fff41b2e | 522 | dump_gpadl_header(gpadlmsg); |
3e7ee490 | 523 | |
dd0813b6 | 524 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
c50f7fb2 | 525 | list_add_tail(&msginfo->msglistentry, |
53af545b | 526 | &gVmbusConnection.ChannelMsgList); |
3e7ee490 | 527 | |
53af545b | 528 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 | 529 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
39d70a4a | 530 | kbuffer, size, msgcount); |
3e7ee490 | 531 | |
f4266e34 | 532 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
c50f7fb2 | 533 | msginfo->msgsize - sizeof(*msginfo)); |
3e7ee490 | 534 | |
c50f7fb2 | 535 | ret = VmbusPostMessage(gpadlmsg, msginfo->msgsize - |
39d70a4a | 536 | sizeof(*msginfo)); |
f4266e34 | 537 | if (ret != 0) { |
3e7ee490 HJ |
538 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
539 | goto Cleanup; | |
540 | } | |
541 | ||
39d70a4a | 542 | if (msgcount > 1) { |
c50f7fb2 | 543 | list_for_each(curr, &msginfo->submsglist) { |
53af545b BP |
544 | |
545 | /* FIXME: should this use list_entry() instead ? */ | |
39d70a4a HZ |
546 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
547 | gpadl_body = | |
c50f7fb2 | 548 | (struct vmbus_channel_gpadl_body *)submsginfo->msg; |
3e7ee490 | 549 | |
c50f7fb2 HZ |
550 | gpadl_body->header.msgtype = |
551 | CHANNELMSG_GPADL_BODY; | |
552 | gpadl_body->gpadl = next_gpadl_handle; | |
3e7ee490 | 553 | |
f4266e34 | 554 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
c50f7fb2 | 555 | submsginfo->msgsize - |
39d70a4a HZ |
556 | sizeof(*submsginfo)); |
557 | ||
c50f7fb2 | 558 | dump_gpadl_body(gpadl_body, submsginfo->msgsize - |
39d70a4a HZ |
559 | sizeof(*submsginfo)); |
560 | ret = VmbusPostMessage(gpadl_body, | |
c50f7fb2 | 561 | submsginfo->msgsize - |
39d70a4a | 562 | sizeof(*submsginfo)); |
fd4dc88e | 563 | if (ret != 0) |
99259159 BP |
564 | goto Cleanup; |
565 | ||
3e7ee490 HJ |
566 | } |
567 | } | |
203df82d | 568 | osd_waitevent_wait(msginfo->waitevent); |
3e7ee490 | 569 | |
454f18a9 | 570 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
571 | DPRINT_DBG(VMBUS, "Received GPADL created " |
572 | "(relid %d, status %d handle %x)", | |
c50f7fb2 HZ |
573 | channel->offermsg.child_relid, |
574 | msginfo->response.gpadl_created.creation_status, | |
575 | gpadlmsg->gpadl); | |
3e7ee490 | 576 | |
c50f7fb2 | 577 | *gpadl_handle = gpadlmsg->gpadl; |
3e7ee490 HJ |
578 | |
579 | Cleanup: | |
dd0813b6 | 580 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
c50f7fb2 | 581 | list_del(&msginfo->msglistentry); |
dd0813b6 | 582 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 583 | |
c50f7fb2 | 584 | kfree(msginfo->waitevent); |
39d70a4a | 585 | kfree(msginfo); |
3e7ee490 HJ |
586 | return ret; |
587 | } | |
98873724 | 588 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
3e7ee490 | 589 | |
3e189519 | 590 | /* |
fff41b2e | 591 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
f4266e34 | 592 | */ |
fff41b2e | 593 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
3e7ee490 | 594 | { |
82250213 | 595 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 596 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 597 | unsigned long flags; |
f4266e34 | 598 | int ret; |
3e7ee490 | 599 | |
39d70a4a | 600 | /* ASSERT(gpadl_handle != 0); */ |
3e7ee490 | 601 | |
f4266e34 GKH |
602 | info = kmalloc(sizeof(*info) + |
603 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
604 | if (!info) |
605 | return -ENOMEM; | |
3e7ee490 | 606 | |
203df82d | 607 | info->waitevent = osd_waitevent_create(); |
c50f7fb2 | 608 | if (!info->waitevent) { |
c3bf2e26 BP |
609 | kfree(info); |
610 | return -ENOMEM; | |
611 | } | |
3e7ee490 | 612 | |
c50f7fb2 | 613 | msg = (struct vmbus_channel_gpadl_teardown *)info->msg; |
3e7ee490 | 614 | |
c50f7fb2 HZ |
615 | msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; |
616 | msg->child_relid = channel->offermsg.child_relid; | |
617 | msg->gpadl = gpadl_handle; | |
3e7ee490 | 618 | |
dd0813b6 | 619 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
c50f7fb2 | 620 | list_add_tail(&info->msglistentry, |
53af545b | 621 | &gVmbusConnection.ChannelMsgList); |
dd0813b6 | 622 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 623 | |
f4266e34 GKH |
624 | ret = VmbusPostMessage(msg, |
625 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
626 | if (ret != 0) { | |
454f18a9 | 627 | /* TODO: */ |
f4266e34 | 628 | /* something... */ |
3e7ee490 HJ |
629 | } |
630 | ||
203df82d | 631 | osd_waitevent_wait(info->waitevent); |
3e7ee490 | 632 | |
454f18a9 | 633 | /* Received a torndown response */ |
dd0813b6 | 634 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
c50f7fb2 | 635 | list_del(&info->msglistentry); |
dd0813b6 | 636 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 637 | |
c50f7fb2 | 638 | kfree(info->waitevent); |
8c69f52a | 639 | kfree(info); |
3e7ee490 HJ |
640 | return ret; |
641 | } | |
18726d7a | 642 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
3e7ee490 | 643 | |
3e189519 | 644 | /* |
fff41b2e | 645 | * vmbus_close - Close the specified channel |
f4266e34 | 646 | */ |
fff41b2e | 647 | void vmbus_close(struct vmbus_channel *channel) |
3e7ee490 | 648 | { |
82250213 | 649 | struct vmbus_channel_close_channel *msg; |
aded7165 | 650 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 651 | unsigned long flags; |
f4266e34 | 652 | int ret; |
3e7ee490 | 653 | |
454f18a9 | 654 | /* Stop callback and cancel the timer asap */ |
c50f7fb2 | 655 | channel->onchannel_callback = NULL; |
39d70a4a | 656 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 657 | |
454f18a9 | 658 | /* Send a closing message */ |
f4266e34 GKH |
659 | info = kmalloc(sizeof(*info) + |
660 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
661 | /* FIXME: can't do anything other than return here because the |
662 | * function is void */ | |
663 | if (!info) | |
664 | return; | |
3e7ee490 | 665 | |
203df82d | 666 | /* info->waitEvent = osd_waitevent_create(); */ |
3e7ee490 | 667 | |
c50f7fb2 HZ |
668 | msg = (struct vmbus_channel_close_channel *)info->msg; |
669 | msg->header.msgtype = CHANNELMSG_CLOSECHANNEL; | |
670 | msg->child_relid = channel->offermsg.child_relid; | |
3e7ee490 | 671 | |
82250213 | 672 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 673 | if (ret != 0) { |
454f18a9 | 674 | /* TODO: */ |
f4266e34 | 675 | /* something... */ |
3e7ee490 HJ |
676 | } |
677 | ||
454f18a9 | 678 | /* Tear down the gpadl for the channel's ring buffer */ |
c50f7fb2 | 679 | if (channel->ringbuffer_gpadlhandle) |
fff41b2e | 680 | vmbus_teardown_gpadl(channel, |
c50f7fb2 | 681 | channel->ringbuffer_gpadlhandle); |
3e7ee490 | 682 | |
454f18a9 | 683 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 684 | |
454f18a9 | 685 | /* Cleanup the ring buffers for this channel */ |
c50f7fb2 HZ |
686 | RingBufferCleanup(&channel->outbound); |
687 | RingBufferCleanup(&channel->inbound); | |
3e7ee490 | 688 | |
203df82d | 689 | osd_page_free(channel->ringbuffer_pages, channel->ringbuffer_pagecount); |
3e7ee490 | 690 | |
8c69f52a | 691 | kfree(info); |
3e7ee490 | 692 | |
454f18a9 BP |
693 | /* |
694 | * If we are closing the channel during an error path in | |
695 | * opening the channel, don't free the channel since the | |
696 | * caller will free the channel | |
697 | */ | |
698 | ||
c50f7fb2 | 699 | if (channel->state == CHANNEL_OPEN_STATE) { |
0f5e44ca | 700 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
c50f7fb2 | 701 | list_del(&channel->listentry); |
0f5e44ca | 702 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 703 | |
e98cb276 | 704 | free_channel(channel); |
3e7ee490 | 705 | } |
3e7ee490 | 706 | } |
70bfa307 | 707 | EXPORT_SYMBOL_GPL(vmbus_close); |
3e7ee490 | 708 | |
c88c4e4c | 709 | /** |
fff41b2e | 710 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
39d70a4a HZ |
711 | * @channel: Pointer to vmbus_channel structure. |
712 | * @buffer: Pointer to the buffer you want to receive the data into. | |
713 | * @bufferlen: Maximum size of what the the buffer will hold | |
714 | * @requestid: Identifier of the request | |
715 | * @type: Type of packet that is being send e.g. negotiate, time | |
c88c4e4c HJ |
716 | * packet etc. |
717 | * | |
39d70a4a | 718 | * Sends data in @buffer directly to hyper-v via the vmbus |
c88c4e4c HJ |
719 | * This will send the data unparsed to hyper-v. |
720 | * | |
721 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 722 | */ |
fff41b2e | 723 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
39d70a4a HZ |
724 | u32 bufferlen, u64 requestid, |
725 | enum vmbus_packet_type type, u32 flags) | |
3e7ee490 | 726 | { |
8dc0a06a | 727 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
728 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
729 | u32 packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); | |
730 | struct scatterlist bufferlist[3]; | |
731 | u64 aligned_data = 0; | |
f4266e34 | 732 | int ret; |
3e7ee490 | 733 | |
f4266e34 | 734 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
39d70a4a | 735 | channel, buffer, bufferlen); |
3e7ee490 | 736 | |
fff41b2e | 737 | dump_vmbus_channel(channel); |
3e7ee490 | 738 | |
0ace247e | 739 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 740 | |
454f18a9 | 741 | /* Setup the descriptor */ |
39d70a4a HZ |
742 | desc.Type = type; /* VmbusPacketTypeDataInBand; */ |
743 | desc.Flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
744 | /* in 8-bytes granularity */ |
745 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
39d70a4a HZ |
746 | desc.Length8 = (u16)(packetlen_aligned >> 3); |
747 | desc.TransactionId = requestid; | |
3e7ee490 | 748 | |
39d70a4a HZ |
749 | sg_init_table(bufferlist, 3); |
750 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); | |
751 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
752 | sg_set_buf(&bufferlist[2], &aligned_data, | |
753 | packetlen_aligned - packetlen); | |
3e7ee490 | 754 | |
c50f7fb2 | 755 | ret = RingBufferWrite(&channel->outbound, bufferlist, 3); |
3e7ee490 | 756 | |
454f18a9 | 757 | /* TODO: We should determine if this is optional */ |
c50f7fb2 | 758 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->outbound)) |
fff41b2e | 759 | vmbus_setevent(channel); |
3e7ee490 | 760 | |
3e7ee490 HJ |
761 | return ret; |
762 | } | |
fff41b2e | 763 | EXPORT_SYMBOL(vmbus_sendpacket); |
3e7ee490 | 764 | |
3e189519 | 765 | /* |
fff41b2e | 766 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
3e189519 | 767 | * packets using a GPADL Direct packet type. |
f4266e34 | 768 | */ |
fff41b2e | 769 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
770 | struct hv_page_buffer pagebuffers[], |
771 | u32 pagecount, void *buffer, u32 bufferlen, | |
772 | u64 requestid) | |
3e7ee490 | 773 | { |
f4266e34 GKH |
774 | int ret; |
775 | int i; | |
430a8e9a | 776 | struct vmbus_channel_packet_page_buffer desc; |
39d70a4a HZ |
777 | u32 descsize; |
778 | u32 packetlen; | |
779 | u32 packetlen_aligned; | |
780 | struct scatterlist bufferlist[3]; | |
781 | u64 aligned_data = 0; | |
3e7ee490 | 782 | |
39d70a4a | 783 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
002b53ea | 784 | return -EINVAL; |
3e7ee490 | 785 | |
fff41b2e | 786 | dump_vmbus_channel(channel); |
3e7ee490 | 787 | |
f4266e34 | 788 | /* |
430a8e9a | 789 | * Adjust the size down since vmbus_channel_packet_page_buffer is the |
f4266e34 GKH |
790 | * largest size we support |
791 | */ | |
39d70a4a HZ |
792 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
793 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * | |
f4266e34 | 794 | sizeof(struct hv_page_buffer)); |
39d70a4a HZ |
795 | packetlen = descsize + bufferlen; |
796 | packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); | |
3e7ee490 | 797 | |
0ace247e | 798 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 799 | |
454f18a9 | 800 | /* Setup the descriptor */ |
430a8e9a HZ |
801 | desc.type = VmbusPacketTypeDataUsingGpaDirect; |
802 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
39d70a4a HZ |
803 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
804 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
805 | desc.transactionid = requestid; | |
806 | desc.rangecount = pagecount; | |
807 | ||
808 | for (i = 0; i < pagecount; i++) { | |
809 | desc.range[i].Length = pagebuffers[i].Length; | |
810 | desc.range[i].Offset = pagebuffers[i].Offset; | |
811 | desc.range[i].Pfn = pagebuffers[i].Pfn; | |
3e7ee490 HJ |
812 | } |
813 | ||
39d70a4a HZ |
814 | sg_init_table(bufferlist, 3); |
815 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
816 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
817 | sg_set_buf(&bufferlist[2], &aligned_data, | |
818 | packetlen_aligned - packetlen); | |
3e7ee490 | 819 | |
c50f7fb2 | 820 | ret = RingBufferWrite(&channel->outbound, bufferlist, 3); |
3e7ee490 | 821 | |
454f18a9 | 822 | /* TODO: We should determine if this is optional */ |
c50f7fb2 | 823 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->outbound)) |
fff41b2e | 824 | vmbus_setevent(channel); |
3e7ee490 | 825 | |
3e7ee490 HJ |
826 | return ret; |
827 | } | |
713efeb4 | 828 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); |
3e7ee490 | 829 | |
3e189519 | 830 | /* |
fff41b2e | 831 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
3e189519 | 832 | * using a GPADL Direct packet type. |
f4266e34 | 833 | */ |
fff41b2e | 834 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
835 | struct hv_multipage_buffer *multi_pagebuffer, |
836 | void *buffer, u32 bufferlen, u64 requestid) | |
3e7ee490 | 837 | { |
f4266e34 | 838 | int ret; |
430a8e9a | 839 | struct vmbus_channel_packet_multipage_buffer desc; |
39d70a4a HZ |
840 | u32 descsize; |
841 | u32 packetlen; | |
842 | u32 packetlen_aligned; | |
843 | struct scatterlist bufferlist[3]; | |
844 | u64 aligned_data = 0; | |
845 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->Offset, | |
846 | multi_pagebuffer->Length); | |
3e7ee490 | 847 | |
fff41b2e | 848 | dump_vmbus_channel(channel); |
3e7ee490 | 849 | |
f4266e34 | 850 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
39d70a4a HZ |
851 | multi_pagebuffer->Offset, |
852 | multi_pagebuffer->Length, pfncount); | |
3e7ee490 | 853 | |
39d70a4a | 854 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
002b53ea | 855 | return -EINVAL; |
3e7ee490 | 856 | |
f4266e34 | 857 | /* |
430a8e9a | 858 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
f4266e34 GKH |
859 | * the largest size we support |
860 | */ | |
39d70a4a HZ |
861 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
862 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * | |
f4266e34 | 863 | sizeof(u64)); |
39d70a4a HZ |
864 | packetlen = descsize + bufferlen; |
865 | packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); | |
3e7ee490 | 866 | |
0ace247e | 867 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 868 | |
454f18a9 | 869 | /* Setup the descriptor */ |
430a8e9a HZ |
870 | desc.type = VmbusPacketTypeDataUsingGpaDirect; |
871 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
39d70a4a HZ |
872 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
873 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
874 | desc.transactionid = requestid; | |
430a8e9a | 875 | desc.rangecount = 1; |
3e7ee490 | 876 | |
39d70a4a HZ |
877 | desc.range.Length = multi_pagebuffer->Length; |
878 | desc.range.Offset = multi_pagebuffer->Offset; | |
3e7ee490 | 879 | |
39d70a4a HZ |
880 | memcpy(desc.range.PfnArray, multi_pagebuffer->PfnArray, |
881 | pfncount * sizeof(u64)); | |
3e7ee490 | 882 | |
39d70a4a HZ |
883 | sg_init_table(bufferlist, 3); |
884 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
885 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
886 | sg_set_buf(&bufferlist[2], &aligned_data, | |
887 | packetlen_aligned - packetlen); | |
3e7ee490 | 888 | |
c50f7fb2 | 889 | ret = RingBufferWrite(&channel->outbound, bufferlist, 3); |
3e7ee490 | 890 | |
454f18a9 | 891 | /* TODO: We should determine if this is optional */ |
c50f7fb2 | 892 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->outbound)) |
fff41b2e | 893 | vmbus_setevent(channel); |
3e7ee490 | 894 | |
3e7ee490 HJ |
895 | return ret; |
896 | } | |
4cb106fa | 897 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
c88c4e4c HJ |
898 | |
899 | /** | |
fff41b2e | 900 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
39d70a4a HZ |
901 | * @channel: Pointer to vmbus_channel structure. |
902 | * @buffer: Pointer to the buffer you want to receive the data into. | |
903 | * @bufferlen: Maximum size of what the the buffer will hold | |
904 | * @buffer_actual_len: The actual size of the data after it was received | |
905 | * @requestid: Identifier of the request | |
c88c4e4c HJ |
906 | * |
907 | * Receives directly from the hyper-v vmbus and puts the data it received | |
908 | * into Buffer. This will receive the data unparsed from hyper-v. | |
909 | * | |
910 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 911 | */ |
fff41b2e | 912 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
39d70a4a | 913 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
3e7ee490 | 914 | { |
8dc0a06a | 915 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
916 | u32 packetlen; |
917 | u32 userlen; | |
3e7ee490 | 918 | int ret; |
54411c42 | 919 | unsigned long flags; |
3e7ee490 | 920 | |
39d70a4a HZ |
921 | *buffer_actual_len = 0; |
922 | *requestid = 0; | |
3e7ee490 | 923 | |
39d70a4a | 924 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 925 | |
c50f7fb2 | 926 | ret = RingBufferPeek(&channel->inbound, &desc, |
f4266e34 GKH |
927 | sizeof(struct vmpacket_descriptor)); |
928 | if (ret != 0) { | |
39d70a4a | 929 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 930 | |
454f18a9 | 931 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
932 | return 0; |
933 | } | |
934 | ||
454f18a9 | 935 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 936 | |
39d70a4a HZ |
937 | packetlen = desc.Length8 << 3; |
938 | userlen = packetlen - (desc.DataOffset8 << 3); | |
454f18a9 | 939 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 940 | |
f4266e34 GKH |
941 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
942 | "flag %d tid %llx pktlen %d datalen %d> ", | |
c50f7fb2 | 943 | channel, channel->offermsg.child_relid, desc.Type, |
39d70a4a | 944 | desc.Flags, desc.TransactionId, packetlen, userlen); |
3e7ee490 | 945 | |
39d70a4a | 946 | *buffer_actual_len = userlen; |
3e7ee490 | 947 | |
39d70a4a HZ |
948 | if (userlen > bufferlen) { |
949 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 950 | |
f4266e34 | 951 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
39d70a4a | 952 | bufferlen, userlen); |
3e7ee490 HJ |
953 | return -1; |
954 | } | |
955 | ||
39d70a4a | 956 | *requestid = desc.TransactionId; |
3e7ee490 | 957 | |
454f18a9 | 958 | /* Copy over the packet to the user buffer */ |
c50f7fb2 | 959 | ret = RingBufferRead(&channel->inbound, buffer, userlen, |
f4266e34 | 960 | (desc.DataOffset8 << 3)); |
3e7ee490 | 961 | |
39d70a4a | 962 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 963 | |
3e7ee490 HJ |
964 | return 0; |
965 | } | |
fff41b2e | 966 | EXPORT_SYMBOL(vmbus_recvpacket); |
3e7ee490 | 967 | |
3e189519 | 968 | /* |
fff41b2e | 969 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
f4266e34 | 970 | */ |
fff41b2e | 971 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
39d70a4a HZ |
972 | u32 bufferlen, u32 *buffer_actual_len, |
973 | u64 *requestid) | |
3e7ee490 | 974 | { |
8dc0a06a | 975 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
976 | u32 packetlen; |
977 | u32 userlen; | |
3e7ee490 | 978 | int ret; |
54411c42 | 979 | unsigned long flags; |
3e7ee490 | 980 | |
39d70a4a HZ |
981 | *buffer_actual_len = 0; |
982 | *requestid = 0; | |
3e7ee490 | 983 | |
39d70a4a | 984 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 985 | |
c50f7fb2 | 986 | ret = RingBufferPeek(&channel->inbound, &desc, |
f4266e34 GKH |
987 | sizeof(struct vmpacket_descriptor)); |
988 | if (ret != 0) { | |
39d70a4a | 989 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 990 | |
454f18a9 | 991 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
992 | return 0; |
993 | } | |
994 | ||
454f18a9 | 995 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 996 | |
39d70a4a HZ |
997 | packetlen = desc.Length8 << 3; |
998 | userlen = packetlen - (desc.DataOffset8 << 3); | |
3e7ee490 | 999 | |
f4266e34 GKH |
1000 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
1001 | "flag %d tid %llx pktlen %d datalen %d> ", | |
c50f7fb2 | 1002 | channel, channel->offermsg.child_relid, desc.Type, |
39d70a4a | 1003 | desc.Flags, desc.TransactionId, packetlen, userlen); |
3e7ee490 | 1004 | |
39d70a4a | 1005 | *buffer_actual_len = packetlen; |
3e7ee490 | 1006 | |
39d70a4a HZ |
1007 | if (packetlen > bufferlen) { |
1008 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 1009 | |
f4266e34 | 1010 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
39d70a4a | 1011 | "got space for only %d bytes", packetlen, bufferlen); |
3e7ee490 HJ |
1012 | return -2; |
1013 | } | |
1014 | ||
39d70a4a | 1015 | *requestid = desc.TransactionId; |
3e7ee490 | 1016 | |
454f18a9 | 1017 | /* Copy over the entire packet to the user buffer */ |
c50f7fb2 | 1018 | ret = RingBufferRead(&channel->inbound, buffer, packetlen, 0); |
3e7ee490 | 1019 | |
39d70a4a | 1020 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
1021 | return 0; |
1022 | } | |
adaee6bd | 1023 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
3e7ee490 | 1024 | |
3e189519 | 1025 | /* |
fff41b2e | 1026 | * vmbus_onchannel_event - Channel event callback |
f4266e34 | 1027 | */ |
fff41b2e | 1028 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
3e7ee490 | 1029 | { |
fff41b2e | 1030 | dump_vmbus_channel(channel); |
0ace247e | 1031 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 1032 | |
c50f7fb2 | 1033 | channel->onchannel_callback(channel->channel_callback_context); |
5996b3dd | 1034 | |
39d70a4a | 1035 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
3e7ee490 HJ |
1036 | } |
1037 | ||
3e189519 | 1038 | /* |
fff41b2e | 1039 | * vmbus_ontimer - Timer event callback |
f4266e34 | 1040 | */ |
fff41b2e | 1041 | void vmbus_ontimer(unsigned long data) |
3e7ee490 | 1042 | { |
aded7165 | 1043 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1044 | |
c50f7fb2 HZ |
1045 | if (channel->onchannel_callback) |
1046 | channel->onchannel_callback(channel->channel_callback_context); | |
3e7ee490 HJ |
1047 | } |
1048 | ||
3e189519 | 1049 | /* |
fff41b2e | 1050 | * dump_vmbus_channel- Dump vmbus channel info to the console |
f4266e34 | 1051 | */ |
fff41b2e | 1052 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
3e7ee490 | 1053 | { |
c50f7fb2 | 1054 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->offermsg.child_relid); |
fc8c72eb HZ |
1055 | Dumpring_info(&channel->outbound, "Outbound "); |
1056 | Dumpring_info(&channel->inbound, "Inbound "); | |
3e7ee490 | 1057 | } |