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, |
da9fcb72 | 80 | (unsigned long *) vmbus_connection.send_int_page + |
c50f7fb2 | 81 | (channel->offermsg.child_relid >> 5)); |
3e7ee490 | 82 | |
da9fcb72 | 83 | monitorpage = vmbus_connection.monitor_pages; |
39d70a4a | 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 { |
c6977677 | 91 | vmbus_set_event(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, |
da9fcb72 | 103 | (unsigned long *)vmbus_connection.send_int_page + |
c50f7fb2 | 104 | (Channel->offermsg.child_relid >> 5)); |
3e7ee490 | 105 | |
da9fcb72 HZ |
106 | monitorPage = (struct hv_monitor_page *) |
107 | vmbus_connection.monitor_pages; | |
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, | |
767dff68 | 131 | &channel->offermsg.offer.if_type, sizeof(struct hv_guid)); |
c50f7fb2 | 132 | memcpy(&debuginfo->interface_instance, |
767dff68 | 133 | &channel->offermsg.offer.if_instance, |
f4266e34 | 134 | sizeof(struct hv_guid)); |
3e7ee490 | 135 | |
da9fcb72 | 136 | monitorpage = (struct hv_monitor_page *)vmbus_connection.monitor_pages; |
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 | |
1ac58644 HZ |
158 | ringbuffer_get_debuginfo(&channel->inbound, &debuginfo->inbound); |
159 | ringbuffer_get_debuginfo(&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 */ |
df3493e0 S |
183 | out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
184 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); | |
185 | ||
7e052d98 BP |
186 | if (!out) |
187 | return -ENOMEM; | |
188 | ||
0ace247e | 189 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 190 | |
39d70a4a | 191 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
3e7ee490 | 192 | |
c50f7fb2 HZ |
193 | newchannel->ringbuffer_pages = out; |
194 | newchannel->ringbuffer_pagecount = (send_ringbuffer_size + | |
39d70a4a | 195 | recv_ringbuffer_size) >> PAGE_SHIFT; |
3e7ee490 | 196 | |
1ac58644 | 197 | ret = ringbuffer_init(&newchannel->outbound, out, send_ringbuffer_size); |
fd4dc88e | 198 | if (ret != 0) { |
3324fb40 BP |
199 | err = ret; |
200 | goto errorout; | |
201 | } | |
202 | ||
1ac58644 | 203 | ret = ringbuffer_init(&newchannel->inbound, in, recv_ringbuffer_size); |
fd4dc88e | 204 | if (ret != 0) { |
3324fb40 BP |
205 | err = ret; |
206 | goto errorout; | |
207 | } | |
3e7ee490 | 208 | |
3e7ee490 | 209 | |
454f18a9 | 210 | /* Establish the gpadl for the ring buffer */ |
f4266e34 | 211 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
39d70a4a | 212 | newchannel); |
3e7ee490 | 213 | |
c50f7fb2 | 214 | newchannel->ringbuffer_gpadlhandle = 0; |
3e7ee490 | 215 | |
fff41b2e | 216 | ret = vmbus_establish_gpadl(newchannel, |
82f8bd40 | 217 | newchannel->outbound.ring_buffer, |
39d70a4a HZ |
218 | send_ringbuffer_size + |
219 | recv_ringbuffer_size, | |
c50f7fb2 | 220 | &newchannel->ringbuffer_gpadlhandle); |
b94ef345 | 221 | |
fd4dc88e | 222 | if (ret != 0) { |
b94ef345 BP |
223 | err = ret; |
224 | goto errorout; | |
225 | } | |
f4266e34 GKH |
226 | |
227 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
228 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
c50f7fb2 HZ |
229 | newchannel, newchannel->offermsg.child_relid, |
230 | newchannel->ringbuffer_gpadlhandle, | |
82f8bd40 HZ |
231 | newchannel->outbound.ring_buffer, |
232 | newchannel->outbound.ring_size, | |
233 | newchannel->inbound.ring_buffer, | |
234 | newchannel->inbound.ring_size, | |
39d70a4a | 235 | send_ringbuffer_size); |
3e7ee490 | 236 | |
454f18a9 | 237 | /* Create and init the channel open message */ |
f4266e34 GKH |
238 | openInfo = kmalloc(sizeof(*openInfo) + |
239 | sizeof(struct vmbus_channel_open_channel), | |
240 | GFP_KERNEL); | |
c3bf2e26 BP |
241 | if (!openInfo) { |
242 | err = -ENOMEM; | |
243 | goto errorout; | |
244 | } | |
3e7ee490 | 245 | |
203df82d | 246 | openInfo->waitevent = osd_waitevent_create(); |
c50f7fb2 | 247 | if (!openInfo->waitevent) { |
c3bf2e26 BP |
248 | err = -ENOMEM; |
249 | goto errorout; | |
250 | } | |
3e7ee490 | 251 | |
c50f7fb2 HZ |
252 | openMsg = (struct vmbus_channel_open_channel *)openInfo->msg; |
253 | openMsg->header.msgtype = CHANNELMSG_OPENCHANNEL; | |
254 | openMsg->openid = newchannel->offermsg.child_relid; /* FIXME */ | |
255 | openMsg->child_relid = newchannel->offermsg.child_relid; | |
256 | openMsg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; | |
257 | openMsg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >> | |
f4266e34 | 258 | PAGE_SHIFT; |
c50f7fb2 | 259 | openMsg->server_contextarea_gpadlhandle = 0; /* TODO */ |
3e7ee490 | 260 | |
39d70a4a | 261 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
c827f944 BP |
262 | err = -EINVAL; |
263 | goto errorout; | |
264 | } | |
265 | ||
39d70a4a | 266 | if (userdatalen) |
c50f7fb2 | 267 | memcpy(openMsg->userdata, userdata, userdatalen); |
3e7ee490 | 268 | |
15b2f647 | 269 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 270 | list_add_tail(&openInfo->msglistentry, |
da9fcb72 | 271 | &vmbus_connection.chn_msg_list); |
15b2f647 | 272 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
273 | |
274 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
275 | ||
c6977677 | 276 | ret = vmbus_post_msg(openMsg, |
f4266e34 GKH |
277 | sizeof(struct vmbus_channel_open_channel)); |
278 | if (ret != 0) { | |
3e7ee490 HJ |
279 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
280 | goto Cleanup; | |
281 | } | |
282 | ||
454f18a9 | 283 | /* FIXME: Need to time-out here */ |
203df82d | 284 | osd_waitevent_wait(openInfo->waitevent); |
3e7ee490 | 285 | |
c50f7fb2 | 286 | if (openInfo->response.open_result.status == 0) |
39d70a4a | 287 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", newchannel); |
3e7ee490 | 288 | else |
f4266e34 | 289 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
c50f7fb2 | 290 | newchannel, openInfo->response.open_result.status); |
3e7ee490 HJ |
291 | |
292 | Cleanup: | |
15b2f647 | 293 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 294 | list_del(&openInfo->msglistentry); |
15b2f647 | 295 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 296 | |
c50f7fb2 | 297 | kfree(openInfo->waitevent); |
8c69f52a | 298 | kfree(openInfo); |
3e7ee490 | 299 | return 0; |
c3bf2e26 BP |
300 | |
301 | errorout: | |
1ac58644 HZ |
302 | ringbuffer_cleanup(&newchannel->outbound); |
303 | ringbuffer_cleanup(&newchannel->inbound); | |
df3493e0 S |
304 | free_pages((unsigned long)out, |
305 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); | |
c3bf2e26 BP |
306 | kfree(openInfo); |
307 | return err; | |
3e7ee490 | 308 | } |
36ceadfc | 309 | EXPORT_SYMBOL_GPL(vmbus_open); |
3e7ee490 | 310 | |
3e189519 | 311 | /* |
fff41b2e | 312 | * dump_gpadl_body - Dump the gpadl body message to the console for |
3e189519 | 313 | * debugging purposes. |
f4266e34 | 314 | */ |
fff41b2e | 315 | static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len) |
3e7ee490 | 316 | { |
f4266e34 | 317 | int i; |
39d70a4a | 318 | int pfncount; |
3e7ee490 | 319 | |
39d70a4a | 320 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
f4266e34 | 321 | sizeof(u64); |
39d70a4a | 322 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
3e7ee490 | 323 | |
39d70a4a | 324 | for (i = 0; i < pfncount; i++) |
f4266e34 | 325 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
c50f7fb2 | 326 | i, gpadl->pfn[i]); |
3e7ee490 HJ |
327 | } |
328 | ||
3e189519 | 329 | /* |
fff41b2e | 330 | * dump_gpadl_header - Dump the gpadl header message to the console for |
3e189519 | 331 | * debugging purposes. |
f4266e34 | 332 | */ |
fff41b2e | 333 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
3e7ee490 | 334 | { |
f4266e34 | 335 | int i, j; |
39d70a4a | 336 | int pagecount; |
3e7ee490 | 337 | |
f4266e34 GKH |
338 | DPRINT_DBG(VMBUS, |
339 | "gpadl header - relid %d, range count %d, range buflen %d", | |
c50f7fb2 HZ |
340 | gpadl->child_relid, gpadl->rangecount, gpadl->range_buflen); |
341 | for (i = 0; i < gpadl->rangecount; i++) { | |
415f2287 | 342 | pagecount = gpadl->range[i].byte_count >> PAGE_SHIFT; |
39d70a4a | 343 | pagecount = (pagecount > 26) ? 26 : pagecount; |
3e7ee490 | 344 | |
f4266e34 | 345 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
415f2287 HZ |
346 | "page count %d", i, gpadl->range[i].byte_count, |
347 | gpadl->range[i].byte_offset, pagecount); | |
3e7ee490 | 348 | |
39d70a4a | 349 | for (j = 0; j < pagecount; j++) |
f4266e34 | 350 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
415f2287 | 351 | gpadl->range[i].pfn_array[j]); |
3e7ee490 HJ |
352 | } |
353 | } | |
354 | ||
3e189519 | 355 | /* |
fff41b2e | 356 | * create_gpadl_header - Creates a gpadl for the specified buffer |
f4266e34 | 357 | */ |
fff41b2e | 358 | static int create_gpadl_header(void *kbuffer, u32 size, |
39d70a4a HZ |
359 | struct vmbus_channel_msginfo **msginfo, |
360 | u32 *messagecount) | |
3e7ee490 HJ |
361 | { |
362 | int i; | |
39d70a4a | 363 | int pagecount; |
f4266e34 | 364 | unsigned long long pfn; |
39d70a4a HZ |
365 | struct vmbus_channel_gpadl_header *gpadl_header; |
366 | struct vmbus_channel_gpadl_body *gpadl_body; | |
367 | struct vmbus_channel_msginfo *msgheader; | |
368 | struct vmbus_channel_msginfo *msgbody = NULL; | |
369 | u32 msgsize; | |
3e7ee490 | 370 | |
39d70a4a | 371 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
3e7ee490 | 372 | |
f4266e34 | 373 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 374 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 375 | |
39d70a4a HZ |
376 | pagecount = size >> PAGE_SHIFT; |
377 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; | |
3e7ee490 | 378 | |
454f18a9 | 379 | /* do we need a gpadl body msg */ |
39d70a4a | 380 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 GKH |
381 | sizeof(struct vmbus_channel_gpadl_header) - |
382 | sizeof(struct gpa_range); | |
39d70a4a | 383 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 384 | |
39d70a4a | 385 | if (pagecount > pfncount) { |
f4266e34 | 386 | /* we need a gpadl body */ |
454f18a9 | 387 | /* fill in the header */ |
39d70a4a | 388 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 389 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
390 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
391 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
392 | if (!msgheader) | |
d1c250bb | 393 | goto nomem; |
3e7ee490 | 394 | |
c50f7fb2 HZ |
395 | INIT_LIST_HEAD(&msgheader->submsglist); |
396 | msgheader->msgsize = msgsize; | |
3e7ee490 | 397 | |
39d70a4a | 398 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
c50f7fb2 HZ |
399 | msgheader->msg; |
400 | gpadl_header->rangecount = 1; | |
401 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 402 | pagecount * sizeof(u64); |
415f2287 HZ |
403 | gpadl_header->range[0].byte_offset = 0; |
404 | gpadl_header->range[0].byte_count = size; | |
39d70a4a | 405 | for (i = 0; i < pfncount; i++) |
415f2287 | 406 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
39d70a4a HZ |
407 | *msginfo = msgheader; |
408 | *messagecount = 1; | |
3e7ee490 | 409 | |
39d70a4a HZ |
410 | pfnsum = pfncount; |
411 | pfnleft = pagecount - pfncount; | |
3e7ee490 | 412 | |
454f18a9 | 413 | /* how many pfns can we fit */ |
39d70a4a | 414 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 | 415 | sizeof(struct vmbus_channel_gpadl_body); |
39d70a4a | 416 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 417 | |
454f18a9 | 418 | /* fill in the body */ |
39d70a4a HZ |
419 | while (pfnleft) { |
420 | if (pfnleft > pfncount) | |
421 | pfncurr = pfncount; | |
3e7ee490 | 422 | else |
39d70a4a | 423 | pfncurr = pfnleft; |
3e7ee490 | 424 | |
39d70a4a | 425 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 426 | sizeof(struct vmbus_channel_gpadl_body) + |
39d70a4a HZ |
427 | pfncurr * sizeof(u64); |
428 | msgbody = kzalloc(msgsize, GFP_KERNEL); | |
d1c250bb | 429 | /* FIXME: we probably need to more if this fails */ |
39d70a4a | 430 | if (!msgbody) |
d1c250bb | 431 | goto nomem; |
c50f7fb2 | 432 | msgbody->msgsize = msgsize; |
39d70a4a HZ |
433 | (*messagecount)++; |
434 | gpadl_body = | |
c50f7fb2 | 435 | (struct vmbus_channel_gpadl_body *)msgbody->msg; |
f4266e34 GKH |
436 | |
437 | /* | |
438 | * FIXME: | |
439 | * Gpadl is u32 and we are using a pointer which could | |
440 | * be 64-bit | |
441 | */ | |
39d70a4a HZ |
442 | /* gpadl_body->Gpadl = kbuffer; */ |
443 | for (i = 0; i < pfncurr; i++) | |
c50f7fb2 | 444 | gpadl_body->pfn[i] = pfn + pfnsum + i; |
3e7ee490 | 445 | |
454f18a9 | 446 | /* add to msg header */ |
c50f7fb2 HZ |
447 | list_add_tail(&msgbody->msglistentry, |
448 | &msgheader->submsglist); | |
39d70a4a HZ |
449 | pfnsum += pfncurr; |
450 | pfnleft -= pfncurr; | |
3e7ee490 | 451 | } |
f4266e34 | 452 | } else { |
454f18a9 | 453 | /* everything fits in a header */ |
39d70a4a | 454 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 455 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
456 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
457 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
458 | if (msgheader == NULL) | |
e3eb7cdd | 459 | goto nomem; |
c50f7fb2 | 460 | msgheader->msgsize = msgsize; |
39d70a4a HZ |
461 | |
462 | gpadl_header = (struct vmbus_channel_gpadl_header *) | |
c50f7fb2 HZ |
463 | msgheader->msg; |
464 | gpadl_header->rangecount = 1; | |
465 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 466 | pagecount * sizeof(u64); |
415f2287 HZ |
467 | gpadl_header->range[0].byte_offset = 0; |
468 | gpadl_header->range[0].byte_count = size; | |
39d70a4a | 469 | for (i = 0; i < pagecount; i++) |
415f2287 | 470 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
39d70a4a HZ |
471 | |
472 | *msginfo = msgheader; | |
473 | *messagecount = 1; | |
3e7ee490 HJ |
474 | } |
475 | ||
476 | return 0; | |
d1c250bb | 477 | nomem: |
39d70a4a HZ |
478 | kfree(msgheader); |
479 | kfree(msgbody); | |
d1c250bb | 480 | return -ENOMEM; |
3e7ee490 HJ |
481 | } |
482 | ||
3e189519 | 483 | /* |
fff41b2e | 484 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
f4266e34 | 485 | * |
39d70a4a HZ |
486 | * @channel: a channel |
487 | * @kbuffer: from kmalloc | |
488 | * @size: page-size multiple | |
489 | * @gpadl_handle: some funky thing | |
f4266e34 | 490 | */ |
fff41b2e | 491 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
39d70a4a | 492 | u32 size, u32 *gpadl_handle) |
3e7ee490 | 493 | { |
39d70a4a HZ |
494 | struct vmbus_channel_gpadl_header *gpadlmsg; |
495 | struct vmbus_channel_gpadl_body *gpadl_body; | |
82250213 | 496 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
39d70a4a HZ |
497 | struct vmbus_channel_msginfo *msginfo = NULL; |
498 | struct vmbus_channel_msginfo *submsginfo; | |
499 | u32 msgcount; | |
53af545b | 500 | struct list_head *curr; |
39d70a4a | 501 | u32 next_gpadl_handle; |
dd0813b6 | 502 | unsigned long flags; |
c3bf2e26 | 503 | int ret = 0; |
3e7ee490 | 504 | |
da9fcb72 HZ |
505 | next_gpadl_handle = atomic_read(&vmbus_connection.next_gpadl_handle); |
506 | atomic_inc(&vmbus_connection.next_gpadl_handle); | |
3e7ee490 | 507 | |
fff41b2e | 508 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
c3bf2e26 BP |
509 | if (ret) |
510 | return ret; | |
3e7ee490 | 511 | |
203df82d | 512 | msginfo->waitevent = osd_waitevent_create(); |
c50f7fb2 | 513 | if (!msginfo->waitevent) { |
c3bf2e26 BP |
514 | ret = -ENOMEM; |
515 | goto Cleanup; | |
516 | } | |
517 | ||
c50f7fb2 HZ |
518 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg; |
519 | gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER; | |
520 | gpadlmsg->child_relid = channel->offermsg.child_relid; | |
521 | gpadlmsg->gpadl = next_gpadl_handle; | |
3e7ee490 | 522 | |
fff41b2e | 523 | dump_gpadl_header(gpadlmsg); |
3e7ee490 | 524 | |
15b2f647 | 525 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 526 | list_add_tail(&msginfo->msglistentry, |
da9fcb72 | 527 | &vmbus_connection.chn_msg_list); |
3e7ee490 | 528 | |
15b2f647 | 529 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
f4266e34 | 530 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
39d70a4a | 531 | kbuffer, size, msgcount); |
3e7ee490 | 532 | |
f4266e34 | 533 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
c50f7fb2 | 534 | msginfo->msgsize - sizeof(*msginfo)); |
3e7ee490 | 535 | |
c6977677 | 536 | ret = vmbus_post_msg(gpadlmsg, msginfo->msgsize - |
39d70a4a | 537 | sizeof(*msginfo)); |
f4266e34 | 538 | if (ret != 0) { |
3e7ee490 HJ |
539 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
540 | goto Cleanup; | |
541 | } | |
542 | ||
39d70a4a | 543 | if (msgcount > 1) { |
c50f7fb2 | 544 | list_for_each(curr, &msginfo->submsglist) { |
53af545b BP |
545 | |
546 | /* FIXME: should this use list_entry() instead ? */ | |
39d70a4a HZ |
547 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
548 | gpadl_body = | |
c50f7fb2 | 549 | (struct vmbus_channel_gpadl_body *)submsginfo->msg; |
3e7ee490 | 550 | |
c50f7fb2 HZ |
551 | gpadl_body->header.msgtype = |
552 | CHANNELMSG_GPADL_BODY; | |
553 | gpadl_body->gpadl = next_gpadl_handle; | |
3e7ee490 | 554 | |
f4266e34 | 555 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
c50f7fb2 | 556 | submsginfo->msgsize - |
39d70a4a HZ |
557 | sizeof(*submsginfo)); |
558 | ||
c50f7fb2 | 559 | dump_gpadl_body(gpadl_body, submsginfo->msgsize - |
39d70a4a | 560 | sizeof(*submsginfo)); |
c6977677 | 561 | ret = vmbus_post_msg(gpadl_body, |
c50f7fb2 | 562 | submsginfo->msgsize - |
39d70a4a | 563 | sizeof(*submsginfo)); |
fd4dc88e | 564 | if (ret != 0) |
99259159 BP |
565 | goto Cleanup; |
566 | ||
3e7ee490 HJ |
567 | } |
568 | } | |
203df82d | 569 | osd_waitevent_wait(msginfo->waitevent); |
3e7ee490 | 570 | |
454f18a9 | 571 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
572 | DPRINT_DBG(VMBUS, "Received GPADL created " |
573 | "(relid %d, status %d handle %x)", | |
c50f7fb2 HZ |
574 | channel->offermsg.child_relid, |
575 | msginfo->response.gpadl_created.creation_status, | |
576 | gpadlmsg->gpadl); | |
3e7ee490 | 577 | |
c50f7fb2 | 578 | *gpadl_handle = gpadlmsg->gpadl; |
3e7ee490 HJ |
579 | |
580 | Cleanup: | |
15b2f647 | 581 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 582 | list_del(&msginfo->msglistentry); |
15b2f647 | 583 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 584 | |
c50f7fb2 | 585 | kfree(msginfo->waitevent); |
39d70a4a | 586 | kfree(msginfo); |
3e7ee490 HJ |
587 | return ret; |
588 | } | |
98873724 | 589 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
3e7ee490 | 590 | |
3e189519 | 591 | /* |
fff41b2e | 592 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
f4266e34 | 593 | */ |
fff41b2e | 594 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
3e7ee490 | 595 | { |
82250213 | 596 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 597 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 598 | unsigned long flags; |
f4266e34 | 599 | int ret; |
3e7ee490 | 600 | |
39d70a4a | 601 | /* ASSERT(gpadl_handle != 0); */ |
3e7ee490 | 602 | |
f4266e34 GKH |
603 | info = kmalloc(sizeof(*info) + |
604 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
605 | if (!info) |
606 | return -ENOMEM; | |
3e7ee490 | 607 | |
203df82d | 608 | info->waitevent = osd_waitevent_create(); |
c50f7fb2 | 609 | if (!info->waitevent) { |
c3bf2e26 BP |
610 | kfree(info); |
611 | return -ENOMEM; | |
612 | } | |
3e7ee490 | 613 | |
c50f7fb2 | 614 | msg = (struct vmbus_channel_gpadl_teardown *)info->msg; |
3e7ee490 | 615 | |
c50f7fb2 HZ |
616 | msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; |
617 | msg->child_relid = channel->offermsg.child_relid; | |
618 | msg->gpadl = gpadl_handle; | |
3e7ee490 | 619 | |
15b2f647 | 620 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 621 | list_add_tail(&info->msglistentry, |
da9fcb72 | 622 | &vmbus_connection.chn_msg_list); |
15b2f647 | 623 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 624 | |
c6977677 | 625 | ret = vmbus_post_msg(msg, |
f4266e34 GKH |
626 | sizeof(struct vmbus_channel_gpadl_teardown)); |
627 | if (ret != 0) { | |
454f18a9 | 628 | /* TODO: */ |
f4266e34 | 629 | /* something... */ |
3e7ee490 HJ |
630 | } |
631 | ||
203df82d | 632 | osd_waitevent_wait(info->waitevent); |
3e7ee490 | 633 | |
454f18a9 | 634 | /* Received a torndown response */ |
15b2f647 | 635 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 636 | list_del(&info->msglistentry); |
15b2f647 | 637 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 638 | |
c50f7fb2 | 639 | kfree(info->waitevent); |
8c69f52a | 640 | kfree(info); |
3e7ee490 HJ |
641 | return ret; |
642 | } | |
18726d7a | 643 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
3e7ee490 | 644 | |
3e189519 | 645 | /* |
fff41b2e | 646 | * vmbus_close - Close the specified channel |
f4266e34 | 647 | */ |
fff41b2e | 648 | void vmbus_close(struct vmbus_channel *channel) |
3e7ee490 | 649 | { |
82250213 | 650 | struct vmbus_channel_close_channel *msg; |
aded7165 | 651 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 652 | unsigned long flags; |
f4266e34 | 653 | int ret; |
3e7ee490 | 654 | |
454f18a9 | 655 | /* Stop callback and cancel the timer asap */ |
c50f7fb2 | 656 | channel->onchannel_callback = NULL; |
39d70a4a | 657 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 658 | |
454f18a9 | 659 | /* Send a closing message */ |
f4266e34 GKH |
660 | info = kmalloc(sizeof(*info) + |
661 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
662 | /* FIXME: can't do anything other than return here because the |
663 | * function is void */ | |
664 | if (!info) | |
665 | return; | |
3e7ee490 | 666 | |
203df82d | 667 | /* info->waitEvent = osd_waitevent_create(); */ |
3e7ee490 | 668 | |
c50f7fb2 HZ |
669 | msg = (struct vmbus_channel_close_channel *)info->msg; |
670 | msg->header.msgtype = CHANNELMSG_CLOSECHANNEL; | |
671 | msg->child_relid = channel->offermsg.child_relid; | |
3e7ee490 | 672 | |
c6977677 | 673 | ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 674 | if (ret != 0) { |
454f18a9 | 675 | /* TODO: */ |
f4266e34 | 676 | /* something... */ |
3e7ee490 HJ |
677 | } |
678 | ||
454f18a9 | 679 | /* Tear down the gpadl for the channel's ring buffer */ |
c50f7fb2 | 680 | if (channel->ringbuffer_gpadlhandle) |
fff41b2e | 681 | vmbus_teardown_gpadl(channel, |
c50f7fb2 | 682 | channel->ringbuffer_gpadlhandle); |
3e7ee490 | 683 | |
454f18a9 | 684 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 685 | |
454f18a9 | 686 | /* Cleanup the ring buffers for this channel */ |
1ac58644 HZ |
687 | ringbuffer_cleanup(&channel->outbound); |
688 | ringbuffer_cleanup(&channel->inbound); | |
3e7ee490 | 689 | |
df3493e0 S |
690 | free_pages((unsigned long)channel->ringbuffer_pages, |
691 | get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); | |
3e7ee490 | 692 | |
8c69f52a | 693 | kfree(info); |
3e7ee490 | 694 | |
454f18a9 BP |
695 | /* |
696 | * If we are closing the channel during an error path in | |
697 | * opening the channel, don't free the channel since the | |
698 | * caller will free the channel | |
699 | */ | |
700 | ||
c50f7fb2 | 701 | if (channel->state == CHANNEL_OPEN_STATE) { |
15b2f647 | 702 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
c50f7fb2 | 703 | list_del(&channel->listentry); |
15b2f647 | 704 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 705 | |
e98cb276 | 706 | free_channel(channel); |
3e7ee490 | 707 | } |
3e7ee490 | 708 | } |
70bfa307 | 709 | EXPORT_SYMBOL_GPL(vmbus_close); |
3e7ee490 | 710 | |
c88c4e4c | 711 | /** |
fff41b2e | 712 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
39d70a4a HZ |
713 | * @channel: Pointer to vmbus_channel structure. |
714 | * @buffer: Pointer to the buffer you want to receive the data into. | |
715 | * @bufferlen: Maximum size of what the the buffer will hold | |
716 | * @requestid: Identifier of the request | |
717 | * @type: Type of packet that is being send e.g. negotiate, time | |
c88c4e4c HJ |
718 | * packet etc. |
719 | * | |
39d70a4a | 720 | * Sends data in @buffer directly to hyper-v via the vmbus |
c88c4e4c HJ |
721 | * This will send the data unparsed to hyper-v. |
722 | * | |
723 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 724 | */ |
fff41b2e | 725 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
39d70a4a HZ |
726 | u32 bufferlen, u64 requestid, |
727 | enum vmbus_packet_type type, u32 flags) | |
3e7ee490 | 728 | { |
8dc0a06a | 729 | struct vmpacket_descriptor desc; |
39d70a4a | 730 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
73509681 | 731 | u32 packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
39d70a4a HZ |
732 | struct scatterlist bufferlist[3]; |
733 | u64 aligned_data = 0; | |
f4266e34 | 734 | int ret; |
3e7ee490 | 735 | |
f4266e34 | 736 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
39d70a4a | 737 | channel, buffer, bufferlen); |
3e7ee490 | 738 | |
fff41b2e | 739 | dump_vmbus_channel(channel); |
3e7ee490 | 740 | |
0ace247e | 741 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 742 | |
454f18a9 | 743 | /* Setup the descriptor */ |
415f2287 HZ |
744 | desc.type = type; /* VmbusPacketTypeDataInBand; */ |
745 | desc.flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 | 746 | /* in 8-bytes granularity */ |
415f2287 HZ |
747 | desc.offset8 = sizeof(struct vmpacket_descriptor) >> 3; |
748 | desc.len8 = (u16)(packetlen_aligned >> 3); | |
749 | desc.trans_id = requestid; | |
3e7ee490 | 750 | |
39d70a4a HZ |
751 | sg_init_table(bufferlist, 3); |
752 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); | |
753 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
754 | sg_set_buf(&bufferlist[2], &aligned_data, | |
755 | packetlen_aligned - packetlen); | |
3e7ee490 | 756 | |
1ac58644 | 757 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 758 | |
454f18a9 | 759 | /* TODO: We should determine if this is optional */ |
1ac58644 | 760 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 761 | vmbus_setevent(channel); |
3e7ee490 | 762 | |
3e7ee490 HJ |
763 | return ret; |
764 | } | |
fff41b2e | 765 | EXPORT_SYMBOL(vmbus_sendpacket); |
3e7ee490 | 766 | |
3e189519 | 767 | /* |
fff41b2e | 768 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
3e189519 | 769 | * packets using a GPADL Direct packet type. |
f4266e34 | 770 | */ |
fff41b2e | 771 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
772 | struct hv_page_buffer pagebuffers[], |
773 | u32 pagecount, void *buffer, u32 bufferlen, | |
774 | u64 requestid) | |
3e7ee490 | 775 | { |
f4266e34 GKH |
776 | int ret; |
777 | int i; | |
430a8e9a | 778 | struct vmbus_channel_packet_page_buffer desc; |
39d70a4a HZ |
779 | u32 descsize; |
780 | u32 packetlen; | |
781 | u32 packetlen_aligned; | |
782 | struct scatterlist bufferlist[3]; | |
783 | u64 aligned_data = 0; | |
3e7ee490 | 784 | |
39d70a4a | 785 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
002b53ea | 786 | return -EINVAL; |
3e7ee490 | 787 | |
fff41b2e | 788 | dump_vmbus_channel(channel); |
3e7ee490 | 789 | |
f4266e34 | 790 | /* |
430a8e9a | 791 | * Adjust the size down since vmbus_channel_packet_page_buffer is the |
f4266e34 GKH |
792 | * largest size we support |
793 | */ | |
39d70a4a HZ |
794 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
795 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * | |
f4266e34 | 796 | sizeof(struct hv_page_buffer)); |
39d70a4a | 797 | packetlen = descsize + bufferlen; |
73509681 | 798 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
3e7ee490 | 799 | |
0ace247e | 800 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 801 | |
454f18a9 | 802 | /* Setup the descriptor */ |
415f2287 | 803 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
430a8e9a | 804 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
39d70a4a HZ |
805 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
806 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
807 | desc.transactionid = requestid; | |
808 | desc.rangecount = pagecount; | |
809 | ||
810 | for (i = 0; i < pagecount; i++) { | |
ca623ad3 HZ |
811 | desc.range[i].len = pagebuffers[i].len; |
812 | desc.range[i].offset = pagebuffers[i].offset; | |
813 | desc.range[i].pfn = pagebuffers[i].pfn; | |
3e7ee490 HJ |
814 | } |
815 | ||
39d70a4a HZ |
816 | sg_init_table(bufferlist, 3); |
817 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
818 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
819 | sg_set_buf(&bufferlist[2], &aligned_data, | |
820 | packetlen_aligned - packetlen); | |
3e7ee490 | 821 | |
1ac58644 | 822 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 823 | |
454f18a9 | 824 | /* TODO: We should determine if this is optional */ |
1ac58644 | 825 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 826 | vmbus_setevent(channel); |
3e7ee490 | 827 | |
3e7ee490 HJ |
828 | return ret; |
829 | } | |
713efeb4 | 830 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); |
3e7ee490 | 831 | |
3e189519 | 832 | /* |
fff41b2e | 833 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
3e189519 | 834 | * using a GPADL Direct packet type. |
f4266e34 | 835 | */ |
fff41b2e | 836 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
837 | struct hv_multipage_buffer *multi_pagebuffer, |
838 | void *buffer, u32 bufferlen, u64 requestid) | |
3e7ee490 | 839 | { |
f4266e34 | 840 | int ret; |
430a8e9a | 841 | struct vmbus_channel_packet_multipage_buffer desc; |
39d70a4a HZ |
842 | u32 descsize; |
843 | u32 packetlen; | |
844 | u32 packetlen_aligned; | |
845 | struct scatterlist bufferlist[3]; | |
846 | u64 aligned_data = 0; | |
ca623ad3 HZ |
847 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, |
848 | multi_pagebuffer->len); | |
3e7ee490 | 849 | |
fff41b2e | 850 | dump_vmbus_channel(channel); |
3e7ee490 | 851 | |
f4266e34 | 852 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
ca623ad3 HZ |
853 | multi_pagebuffer->offset, |
854 | multi_pagebuffer->len, pfncount); | |
3e7ee490 | 855 | |
39d70a4a | 856 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
002b53ea | 857 | return -EINVAL; |
3e7ee490 | 858 | |
f4266e34 | 859 | /* |
430a8e9a | 860 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
f4266e34 GKH |
861 | * the largest size we support |
862 | */ | |
39d70a4a HZ |
863 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
864 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * | |
f4266e34 | 865 | sizeof(u64)); |
39d70a4a | 866 | packetlen = descsize + bufferlen; |
73509681 | 867 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
3e7ee490 | 868 | |
0ace247e | 869 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 870 | |
454f18a9 | 871 | /* Setup the descriptor */ |
415f2287 | 872 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
430a8e9a | 873 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
39d70a4a HZ |
874 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
875 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
876 | desc.transactionid = requestid; | |
430a8e9a | 877 | desc.rangecount = 1; |
3e7ee490 | 878 | |
ca623ad3 HZ |
879 | desc.range.len = multi_pagebuffer->len; |
880 | desc.range.offset = multi_pagebuffer->offset; | |
3e7ee490 | 881 | |
ca623ad3 | 882 | memcpy(desc.range.pfn_array, multi_pagebuffer->pfn_array, |
39d70a4a | 883 | pfncount * sizeof(u64)); |
3e7ee490 | 884 | |
39d70a4a HZ |
885 | sg_init_table(bufferlist, 3); |
886 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
887 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
888 | sg_set_buf(&bufferlist[2], &aligned_data, | |
889 | packetlen_aligned - packetlen); | |
3e7ee490 | 890 | |
1ac58644 | 891 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 892 | |
454f18a9 | 893 | /* TODO: We should determine if this is optional */ |
1ac58644 | 894 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 895 | vmbus_setevent(channel); |
3e7ee490 | 896 | |
3e7ee490 HJ |
897 | return ret; |
898 | } | |
4cb106fa | 899 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
c88c4e4c HJ |
900 | |
901 | /** | |
fff41b2e | 902 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
39d70a4a HZ |
903 | * @channel: Pointer to vmbus_channel structure. |
904 | * @buffer: Pointer to the buffer you want to receive the data into. | |
905 | * @bufferlen: Maximum size of what the the buffer will hold | |
906 | * @buffer_actual_len: The actual size of the data after it was received | |
907 | * @requestid: Identifier of the request | |
c88c4e4c HJ |
908 | * |
909 | * Receives directly from the hyper-v vmbus and puts the data it received | |
910 | * into Buffer. This will receive the data unparsed from hyper-v. | |
911 | * | |
912 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 913 | */ |
fff41b2e | 914 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
39d70a4a | 915 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
3e7ee490 | 916 | { |
8dc0a06a | 917 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
918 | u32 packetlen; |
919 | u32 userlen; | |
3e7ee490 | 920 | int ret; |
54411c42 | 921 | unsigned long flags; |
3e7ee490 | 922 | |
39d70a4a HZ |
923 | *buffer_actual_len = 0; |
924 | *requestid = 0; | |
3e7ee490 | 925 | |
39d70a4a | 926 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 927 | |
1ac58644 | 928 | ret = ringbuffer_peek(&channel->inbound, &desc, |
f4266e34 GKH |
929 | sizeof(struct vmpacket_descriptor)); |
930 | if (ret != 0) { | |
39d70a4a | 931 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 932 | |
454f18a9 | 933 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
934 | return 0; |
935 | } | |
936 | ||
454f18a9 | 937 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 938 | |
415f2287 HZ |
939 | packetlen = desc.len8 << 3; |
940 | userlen = packetlen - (desc.offset8 << 3); | |
454f18a9 | 941 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 942 | |
f4266e34 GKH |
943 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
944 | "flag %d tid %llx pktlen %d datalen %d> ", | |
415f2287 HZ |
945 | channel, channel->offermsg.child_relid, desc.type, |
946 | desc.flags, desc.trans_id, packetlen, userlen); | |
3e7ee490 | 947 | |
39d70a4a | 948 | *buffer_actual_len = userlen; |
3e7ee490 | 949 | |
39d70a4a HZ |
950 | if (userlen > bufferlen) { |
951 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 952 | |
f4266e34 | 953 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
39d70a4a | 954 | bufferlen, userlen); |
3e7ee490 HJ |
955 | return -1; |
956 | } | |
957 | ||
415f2287 | 958 | *requestid = desc.trans_id; |
3e7ee490 | 959 | |
454f18a9 | 960 | /* Copy over the packet to the user buffer */ |
1ac58644 | 961 | ret = ringbuffer_read(&channel->inbound, buffer, userlen, |
415f2287 | 962 | (desc.offset8 << 3)); |
3e7ee490 | 963 | |
39d70a4a | 964 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 965 | |
3e7ee490 HJ |
966 | return 0; |
967 | } | |
fff41b2e | 968 | EXPORT_SYMBOL(vmbus_recvpacket); |
3e7ee490 | 969 | |
3e189519 | 970 | /* |
fff41b2e | 971 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
f4266e34 | 972 | */ |
fff41b2e | 973 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
39d70a4a HZ |
974 | u32 bufferlen, u32 *buffer_actual_len, |
975 | u64 *requestid) | |
3e7ee490 | 976 | { |
8dc0a06a | 977 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
978 | u32 packetlen; |
979 | u32 userlen; | |
3e7ee490 | 980 | int ret; |
54411c42 | 981 | unsigned long flags; |
3e7ee490 | 982 | |
39d70a4a HZ |
983 | *buffer_actual_len = 0; |
984 | *requestid = 0; | |
3e7ee490 | 985 | |
39d70a4a | 986 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 987 | |
1ac58644 | 988 | ret = ringbuffer_peek(&channel->inbound, &desc, |
f4266e34 GKH |
989 | sizeof(struct vmpacket_descriptor)); |
990 | if (ret != 0) { | |
39d70a4a | 991 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 992 | |
454f18a9 | 993 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
994 | return 0; |
995 | } | |
996 | ||
454f18a9 | 997 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 998 | |
415f2287 HZ |
999 | packetlen = desc.len8 << 3; |
1000 | userlen = packetlen - (desc.offset8 << 3); | |
3e7ee490 | 1001 | |
f4266e34 GKH |
1002 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
1003 | "flag %d tid %llx pktlen %d datalen %d> ", | |
415f2287 HZ |
1004 | channel, channel->offermsg.child_relid, desc.type, |
1005 | desc.flags, desc.trans_id, packetlen, userlen); | |
3e7ee490 | 1006 | |
39d70a4a | 1007 | *buffer_actual_len = packetlen; |
3e7ee490 | 1008 | |
39d70a4a HZ |
1009 | if (packetlen > bufferlen) { |
1010 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 1011 | |
f4266e34 | 1012 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
39d70a4a | 1013 | "got space for only %d bytes", packetlen, bufferlen); |
3e7ee490 HJ |
1014 | return -2; |
1015 | } | |
1016 | ||
415f2287 | 1017 | *requestid = desc.trans_id; |
3e7ee490 | 1018 | |
454f18a9 | 1019 | /* Copy over the entire packet to the user buffer */ |
1ac58644 | 1020 | ret = ringbuffer_read(&channel->inbound, buffer, packetlen, 0); |
3e7ee490 | 1021 | |
39d70a4a | 1022 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
1023 | return 0; |
1024 | } | |
adaee6bd | 1025 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
3e7ee490 | 1026 | |
3e189519 | 1027 | /* |
fff41b2e | 1028 | * vmbus_onchannel_event - Channel event callback |
f4266e34 | 1029 | */ |
fff41b2e | 1030 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
3e7ee490 | 1031 | { |
fff41b2e | 1032 | dump_vmbus_channel(channel); |
0ace247e | 1033 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 1034 | |
c50f7fb2 | 1035 | channel->onchannel_callback(channel->channel_callback_context); |
5996b3dd | 1036 | |
39d70a4a | 1037 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
3e7ee490 HJ |
1038 | } |
1039 | ||
3e189519 | 1040 | /* |
fff41b2e | 1041 | * vmbus_ontimer - Timer event callback |
f4266e34 | 1042 | */ |
fff41b2e | 1043 | void vmbus_ontimer(unsigned long data) |
3e7ee490 | 1044 | { |
aded7165 | 1045 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1046 | |
c50f7fb2 HZ |
1047 | if (channel->onchannel_callback) |
1048 | channel->onchannel_callback(channel->channel_callback_context); | |
3e7ee490 HJ |
1049 | } |
1050 | ||
3e189519 | 1051 | /* |
fff41b2e | 1052 | * dump_vmbus_channel- Dump vmbus channel info to the console |
f4266e34 | 1053 | */ |
fff41b2e | 1054 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
3e7ee490 | 1055 | { |
c50f7fb2 | 1056 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->offermsg.child_relid); |
1ac58644 HZ |
1057 | dump_ring_info(&channel->outbound, "Outbound "); |
1058 | dump_ring_info(&channel->inbound, "Inbound "); | |
3e7ee490 | 1059 | } |