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> |
0c3b7b2f S |
22 | #include <linux/sched.h> |
23 | #include <linux/wait.h> | |
a0086dc5 | 24 | #include <linux/mm.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
c88c4e4c | 26 | #include <linux/module.h> |
e3fe0bb6 | 27 | #include "hv_api.h" |
645954c5 | 28 | #include "logging.h" |
72daf320 | 29 | #include "vmbus_private.h" |
3e7ee490 | 30 | |
e3fe0bb6 S |
31 | #define NUM_PAGES_SPANNED(addr, len) \ |
32 | ((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT)) | |
33 | ||
454f18a9 | 34 | /* Internal routines */ |
fff41b2e | 35 | static int create_gpadl_header( |
39d70a4a HZ |
36 | void *kbuffer, /* must be phys and virt contiguous */ |
37 | u32 size, /* page-size multiple */ | |
38 | struct vmbus_channel_msginfo **msginfo, | |
39 | u32 *messagecount); | |
fff41b2e HZ |
40 | static void dump_vmbus_channel(struct vmbus_channel *channel); |
41 | static void vmbus_setevent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
42 | |
43 | ||
44 | #if 0 | |
f4266e34 | 45 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 46 | { |
f4266e34 GKH |
47 | int i = 0; |
48 | int j = 0; | |
3e7ee490 | 49 | |
f4266e34 | 50 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
f6feebe0 | 51 | MonitorPage, MonitorPage->trigger_state); |
3e7ee490 | 52 | |
f4266e34 GKH |
53 | for (i = 0; i < 4; i++) |
54 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
f6feebe0 | 55 | MonitorPage->trigger_group[i].as_uint64); |
3e7ee490 | 56 | |
f4266e34 GKH |
57 | for (i = 0; i < 4; i++) { |
58 | for (j = 0; j < 32; j++) { | |
59 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
f6feebe0 | 60 | MonitorPage->latency[i][j]); |
3e7ee490 HJ |
61 | } |
62 | } | |
f4266e34 GKH |
63 | for (i = 0; i < 4; i++) { |
64 | for (j = 0; j < 32; j++) { | |
65 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
f6feebe0 | 66 | MonitorPage->parameter[i][j].connectionid.asu32); |
f4266e34 | 67 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, |
f6feebe0 | 68 | MonitorPage->parameter[i][j].flag_number); |
3e7ee490 HJ |
69 | } |
70 | } | |
71 | } | |
72 | #endif | |
73 | ||
3e189519 | 74 | /* |
fff41b2e | 75 | * vmbus_setevent- Trigger an event notification on the specified |
3e189519 | 76 | * channel. |
f4266e34 | 77 | */ |
fff41b2e | 78 | static void vmbus_setevent(struct vmbus_channel *channel) |
3e7ee490 | 79 | { |
39d70a4a | 80 | struct hv_monitor_page *monitorpage; |
3e7ee490 | 81 | |
c50f7fb2 | 82 | if (channel->offermsg.monitor_allocated) { |
454f18a9 | 83 | /* Each u32 represents 32 channels */ |
c50f7fb2 | 84 | set_bit(channel->offermsg.child_relid & 31, |
da9fcb72 | 85 | (unsigned long *) vmbus_connection.send_int_page + |
c50f7fb2 | 86 | (channel->offermsg.child_relid >> 5)); |
3e7ee490 | 87 | |
da9fcb72 | 88 | monitorpage = vmbus_connection.monitor_pages; |
39d70a4a | 89 | monitorpage++; /* Get the child to parent monitor page */ |
3e7ee490 | 90 | |
c50f7fb2 | 91 | set_bit(channel->monitor_bit, |
f6feebe0 HZ |
92 | (unsigned long *)&monitorpage->trigger_group |
93 | [channel->monitor_grp].pending); | |
7c369f40 | 94 | |
f4266e34 | 95 | } else { |
c6977677 | 96 | vmbus_set_event(channel->offermsg.child_relid); |
3e7ee490 | 97 | } |
3e7ee490 HJ |
98 | } |
99 | ||
100 | #if 0 | |
aded7165 | 101 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 102 | { |
eacb1b4d | 103 | struct hv_monitor_page *monitorPage; |
3e7ee490 | 104 | |
c50f7fb2 | 105 | if (Channel->offermsg.monitor_allocated) { |
454f18a9 | 106 | /* Each u32 represents 32 channels */ |
c50f7fb2 | 107 | clear_bit(Channel->offermsg.child_relid & 31, |
da9fcb72 | 108 | (unsigned long *)vmbus_connection.send_int_page + |
c50f7fb2 | 109 | (Channel->offermsg.child_relid >> 5)); |
3e7ee490 | 110 | |
da9fcb72 HZ |
111 | monitorPage = (struct hv_monitor_page *) |
112 | vmbus_connection.monitor_pages; | |
454f18a9 | 113 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 114 | |
c50f7fb2 | 115 | clear_bit(Channel->monitor_bit, |
f6feebe0 | 116 | (unsigned long *)&monitorPage->trigger_group |
c50f7fb2 | 117 | [Channel->monitor_grp].Pending); |
3e7ee490 | 118 | } |
3e7ee490 HJ |
119 | } |
120 | ||
121 | #endif | |
3e189519 | 122 | /* |
fff41b2e | 123 | * vmbus_get_debug_info -Retrieve various channel debug info |
f4266e34 | 124 | */ |
fff41b2e | 125 | void vmbus_get_debug_info(struct vmbus_channel *channel, |
39d70a4a | 126 | struct vmbus_channel_debug_info *debuginfo) |
3e7ee490 | 127 | { |
39d70a4a | 128 | struct hv_monitor_page *monitorpage; |
c50f7fb2 HZ |
129 | u8 monitor_group = (u8)channel->offermsg.monitorid / 32; |
130 | u8 monitor_offset = (u8)channel->offermsg.monitorid % 32; | |
454f18a9 | 131 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 | 132 | |
c50f7fb2 HZ |
133 | debuginfo->relid = channel->offermsg.child_relid; |
134 | debuginfo->state = channel->state; | |
135 | memcpy(&debuginfo->interfacetype, | |
767dff68 | 136 | &channel->offermsg.offer.if_type, sizeof(struct hv_guid)); |
c50f7fb2 | 137 | memcpy(&debuginfo->interface_instance, |
767dff68 | 138 | &channel->offermsg.offer.if_instance, |
f4266e34 | 139 | sizeof(struct hv_guid)); |
3e7ee490 | 140 | |
da9fcb72 | 141 | monitorpage = (struct hv_monitor_page *)vmbus_connection.monitor_pages; |
3e7ee490 | 142 | |
c50f7fb2 | 143 | debuginfo->monitorid = channel->offermsg.monitorid; |
3e7ee490 | 144 | |
c50f7fb2 | 145 | debuginfo->servermonitor_pending = |
f6feebe0 | 146 | monitorpage->trigger_group[monitor_group].pending; |
c50f7fb2 | 147 | debuginfo->servermonitor_latency = |
f6feebe0 | 148 | monitorpage->latency[monitor_group][monitor_offset]; |
c50f7fb2 | 149 | debuginfo->servermonitor_connectionid = |
f6feebe0 HZ |
150 | monitorpage->parameter[monitor_group] |
151 | [monitor_offset].connectionid.u.id; | |
3e7ee490 | 152 | |
39d70a4a | 153 | monitorpage++; |
3e7ee490 | 154 | |
c50f7fb2 | 155 | debuginfo->clientmonitor_pending = |
f6feebe0 | 156 | monitorpage->trigger_group[monitor_group].pending; |
c50f7fb2 | 157 | debuginfo->clientmonitor_latency = |
f6feebe0 | 158 | monitorpage->latency[monitor_group][monitor_offset]; |
c50f7fb2 | 159 | debuginfo->clientmonitor_connectionid = |
f6feebe0 HZ |
160 | monitorpage->parameter[monitor_group] |
161 | [monitor_offset].connectionid.u.id; | |
3e7ee490 | 162 | |
1ac58644 HZ |
163 | ringbuffer_get_debuginfo(&channel->inbound, &debuginfo->inbound); |
164 | ringbuffer_get_debuginfo(&channel->outbound, &debuginfo->outbound); | |
3e7ee490 HJ |
165 | } |
166 | ||
3e189519 | 167 | /* |
fff41b2e | 168 | * vmbus_open - Open the specified channel. |
f4266e34 | 169 | */ |
fff41b2e | 170 | int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, |
39d70a4a HZ |
171 | u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, |
172 | void (*onchannelcallback)(void *context), void *context) | |
3e7ee490 | 173 | { |
82250213 | 174 | struct vmbus_channel_open_channel *openMsg; |
b94ef345 | 175 | struct vmbus_channel_msginfo *openInfo = NULL; |
3e7ee490 | 176 | void *in, *out; |
dd0813b6 | 177 | unsigned long flags; |
c3bf2e26 | 178 | int ret, err = 0; |
3e7ee490 | 179 | |
454f18a9 | 180 | /* Aligned to page size */ |
0ace247e BP |
181 | /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */ |
182 | /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */ | |
3e7ee490 | 183 | |
c50f7fb2 HZ |
184 | newchannel->onchannel_callback = onchannelcallback; |
185 | newchannel->channel_callback_context = context; | |
3e7ee490 | 186 | |
454f18a9 | 187 | /* Allocate the ring buffer */ |
df3493e0 S |
188 | out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
189 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); | |
190 | ||
7e052d98 BP |
191 | if (!out) |
192 | return -ENOMEM; | |
193 | ||
0ace247e | 194 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 195 | |
39d70a4a | 196 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
3e7ee490 | 197 | |
c50f7fb2 HZ |
198 | newchannel->ringbuffer_pages = out; |
199 | newchannel->ringbuffer_pagecount = (send_ringbuffer_size + | |
39d70a4a | 200 | recv_ringbuffer_size) >> PAGE_SHIFT; |
3e7ee490 | 201 | |
1ac58644 | 202 | ret = ringbuffer_init(&newchannel->outbound, out, send_ringbuffer_size); |
fd4dc88e | 203 | if (ret != 0) { |
3324fb40 BP |
204 | err = ret; |
205 | goto errorout; | |
206 | } | |
207 | ||
1ac58644 | 208 | ret = ringbuffer_init(&newchannel->inbound, in, recv_ringbuffer_size); |
fd4dc88e | 209 | if (ret != 0) { |
3324fb40 BP |
210 | err = ret; |
211 | goto errorout; | |
212 | } | |
3e7ee490 | 213 | |
3e7ee490 | 214 | |
454f18a9 | 215 | /* Establish the gpadl for the ring buffer */ |
f4266e34 | 216 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
39d70a4a | 217 | newchannel); |
3e7ee490 | 218 | |
c50f7fb2 | 219 | newchannel->ringbuffer_gpadlhandle = 0; |
3e7ee490 | 220 | |
fff41b2e | 221 | ret = vmbus_establish_gpadl(newchannel, |
82f8bd40 | 222 | newchannel->outbound.ring_buffer, |
39d70a4a HZ |
223 | send_ringbuffer_size + |
224 | recv_ringbuffer_size, | |
c50f7fb2 | 225 | &newchannel->ringbuffer_gpadlhandle); |
b94ef345 | 226 | |
fd4dc88e | 227 | if (ret != 0) { |
b94ef345 BP |
228 | err = ret; |
229 | goto errorout; | |
230 | } | |
f4266e34 GKH |
231 | |
232 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
233 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
c50f7fb2 HZ |
234 | newchannel, newchannel->offermsg.child_relid, |
235 | newchannel->ringbuffer_gpadlhandle, | |
82f8bd40 HZ |
236 | newchannel->outbound.ring_buffer, |
237 | newchannel->outbound.ring_size, | |
238 | newchannel->inbound.ring_buffer, | |
239 | newchannel->inbound.ring_size, | |
39d70a4a | 240 | send_ringbuffer_size); |
3e7ee490 | 241 | |
454f18a9 | 242 | /* Create and init the channel open message */ |
f4266e34 GKH |
243 | openInfo = kmalloc(sizeof(*openInfo) + |
244 | sizeof(struct vmbus_channel_open_channel), | |
245 | GFP_KERNEL); | |
c3bf2e26 BP |
246 | if (!openInfo) { |
247 | err = -ENOMEM; | |
248 | goto errorout; | |
249 | } | |
3e7ee490 | 250 | |
0c3b7b2f | 251 | init_waitqueue_head(&openInfo->waitevent); |
3e7ee490 | 252 | |
c50f7fb2 HZ |
253 | openMsg = (struct vmbus_channel_open_channel *)openInfo->msg; |
254 | openMsg->header.msgtype = CHANNELMSG_OPENCHANNEL; | |
255 | openMsg->openid = newchannel->offermsg.child_relid; /* FIXME */ | |
256 | openMsg->child_relid = newchannel->offermsg.child_relid; | |
257 | openMsg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; | |
258 | openMsg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >> | |
f4266e34 | 259 | PAGE_SHIFT; |
c50f7fb2 | 260 | openMsg->server_contextarea_gpadlhandle = 0; /* TODO */ |
3e7ee490 | 261 | |
39d70a4a | 262 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
c827f944 BP |
263 | err = -EINVAL; |
264 | goto errorout; | |
265 | } | |
266 | ||
39d70a4a | 267 | if (userdatalen) |
c50f7fb2 | 268 | memcpy(openMsg->userdata, userdata, userdatalen); |
3e7ee490 | 269 | |
15b2f647 | 270 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 271 | list_add_tail(&openInfo->msglistentry, |
da9fcb72 | 272 | &vmbus_connection.chn_msg_list); |
15b2f647 | 273 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
274 | |
275 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
276 | ||
c6977677 | 277 | ret = vmbus_post_msg(openMsg, |
f4266e34 GKH |
278 | sizeof(struct vmbus_channel_open_channel)); |
279 | if (ret != 0) { | |
3e7ee490 HJ |
280 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
281 | goto Cleanup; | |
282 | } | |
283 | ||
0c3b7b2f S |
284 | openInfo->wait_condition = 0; |
285 | wait_event_timeout(openInfo->waitevent, | |
286 | openInfo->wait_condition, | |
287 | msecs_to_jiffies(1000)); | |
288 | if (openInfo->wait_condition == 0) { | |
289 | err = -ETIMEDOUT; | |
290 | goto errorout; | |
291 | } | |
292 | ||
3e7ee490 | 293 | |
c50f7fb2 | 294 | if (openInfo->response.open_result.status == 0) |
39d70a4a | 295 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", newchannel); |
3e7ee490 | 296 | else |
f4266e34 | 297 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
c50f7fb2 | 298 | newchannel, openInfo->response.open_result.status); |
3e7ee490 HJ |
299 | |
300 | Cleanup: | |
15b2f647 | 301 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 302 | list_del(&openInfo->msglistentry); |
15b2f647 | 303 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 304 | |
8c69f52a | 305 | kfree(openInfo); |
3e7ee490 | 306 | return 0; |
c3bf2e26 BP |
307 | |
308 | errorout: | |
1ac58644 HZ |
309 | ringbuffer_cleanup(&newchannel->outbound); |
310 | ringbuffer_cleanup(&newchannel->inbound); | |
df3493e0 S |
311 | free_pages((unsigned long)out, |
312 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); | |
c3bf2e26 BP |
313 | kfree(openInfo); |
314 | return err; | |
3e7ee490 | 315 | } |
36ceadfc | 316 | EXPORT_SYMBOL_GPL(vmbus_open); |
3e7ee490 | 317 | |
3e189519 | 318 | /* |
fff41b2e | 319 | * dump_gpadl_body - Dump the gpadl body message to the console for |
3e189519 | 320 | * debugging purposes. |
f4266e34 | 321 | */ |
fff41b2e | 322 | static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len) |
3e7ee490 | 323 | { |
f4266e34 | 324 | int i; |
39d70a4a | 325 | int pfncount; |
3e7ee490 | 326 | |
39d70a4a | 327 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
f4266e34 | 328 | sizeof(u64); |
39d70a4a | 329 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
3e7ee490 | 330 | |
39d70a4a | 331 | for (i = 0; i < pfncount; i++) |
f4266e34 | 332 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
c50f7fb2 | 333 | i, gpadl->pfn[i]); |
3e7ee490 HJ |
334 | } |
335 | ||
3e189519 | 336 | /* |
fff41b2e | 337 | * dump_gpadl_header - Dump the gpadl header message to the console for |
3e189519 | 338 | * debugging purposes. |
f4266e34 | 339 | */ |
fff41b2e | 340 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
3e7ee490 | 341 | { |
f4266e34 | 342 | int i, j; |
39d70a4a | 343 | int pagecount; |
3e7ee490 | 344 | |
f4266e34 GKH |
345 | DPRINT_DBG(VMBUS, |
346 | "gpadl header - relid %d, range count %d, range buflen %d", | |
c50f7fb2 HZ |
347 | gpadl->child_relid, gpadl->rangecount, gpadl->range_buflen); |
348 | for (i = 0; i < gpadl->rangecount; i++) { | |
415f2287 | 349 | pagecount = gpadl->range[i].byte_count >> PAGE_SHIFT; |
39d70a4a | 350 | pagecount = (pagecount > 26) ? 26 : pagecount; |
3e7ee490 | 351 | |
f4266e34 | 352 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
415f2287 HZ |
353 | "page count %d", i, gpadl->range[i].byte_count, |
354 | gpadl->range[i].byte_offset, pagecount); | |
3e7ee490 | 355 | |
39d70a4a | 356 | for (j = 0; j < pagecount; j++) |
f4266e34 | 357 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
415f2287 | 358 | gpadl->range[i].pfn_array[j]); |
3e7ee490 HJ |
359 | } |
360 | } | |
361 | ||
3e189519 | 362 | /* |
fff41b2e | 363 | * create_gpadl_header - Creates a gpadl for the specified buffer |
f4266e34 | 364 | */ |
fff41b2e | 365 | static int create_gpadl_header(void *kbuffer, u32 size, |
39d70a4a HZ |
366 | struct vmbus_channel_msginfo **msginfo, |
367 | u32 *messagecount) | |
3e7ee490 HJ |
368 | { |
369 | int i; | |
39d70a4a | 370 | int pagecount; |
f4266e34 | 371 | unsigned long long pfn; |
39d70a4a HZ |
372 | struct vmbus_channel_gpadl_header *gpadl_header; |
373 | struct vmbus_channel_gpadl_body *gpadl_body; | |
374 | struct vmbus_channel_msginfo *msgheader; | |
375 | struct vmbus_channel_msginfo *msgbody = NULL; | |
376 | u32 msgsize; | |
3e7ee490 | 377 | |
39d70a4a | 378 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
3e7ee490 | 379 | |
f4266e34 | 380 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 381 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 382 | |
39d70a4a HZ |
383 | pagecount = size >> PAGE_SHIFT; |
384 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; | |
3e7ee490 | 385 | |
454f18a9 | 386 | /* do we need a gpadl body msg */ |
39d70a4a | 387 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 GKH |
388 | sizeof(struct vmbus_channel_gpadl_header) - |
389 | sizeof(struct gpa_range); | |
39d70a4a | 390 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 391 | |
39d70a4a | 392 | if (pagecount > pfncount) { |
f4266e34 | 393 | /* we need a gpadl body */ |
454f18a9 | 394 | /* fill in the header */ |
39d70a4a | 395 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 396 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
397 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
398 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
399 | if (!msgheader) | |
d1c250bb | 400 | goto nomem; |
3e7ee490 | 401 | |
c50f7fb2 HZ |
402 | INIT_LIST_HEAD(&msgheader->submsglist); |
403 | msgheader->msgsize = msgsize; | |
3e7ee490 | 404 | |
39d70a4a | 405 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
c50f7fb2 HZ |
406 | msgheader->msg; |
407 | gpadl_header->rangecount = 1; | |
408 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 409 | pagecount * sizeof(u64); |
415f2287 HZ |
410 | gpadl_header->range[0].byte_offset = 0; |
411 | gpadl_header->range[0].byte_count = size; | |
39d70a4a | 412 | for (i = 0; i < pfncount; i++) |
415f2287 | 413 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
39d70a4a HZ |
414 | *msginfo = msgheader; |
415 | *messagecount = 1; | |
3e7ee490 | 416 | |
39d70a4a HZ |
417 | pfnsum = pfncount; |
418 | pfnleft = pagecount - pfncount; | |
3e7ee490 | 419 | |
454f18a9 | 420 | /* how many pfns can we fit */ |
39d70a4a | 421 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 | 422 | sizeof(struct vmbus_channel_gpadl_body); |
39d70a4a | 423 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 424 | |
454f18a9 | 425 | /* fill in the body */ |
39d70a4a HZ |
426 | while (pfnleft) { |
427 | if (pfnleft > pfncount) | |
428 | pfncurr = pfncount; | |
3e7ee490 | 429 | else |
39d70a4a | 430 | pfncurr = pfnleft; |
3e7ee490 | 431 | |
39d70a4a | 432 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 433 | sizeof(struct vmbus_channel_gpadl_body) + |
39d70a4a HZ |
434 | pfncurr * sizeof(u64); |
435 | msgbody = kzalloc(msgsize, GFP_KERNEL); | |
d1c250bb | 436 | /* FIXME: we probably need to more if this fails */ |
39d70a4a | 437 | if (!msgbody) |
d1c250bb | 438 | goto nomem; |
c50f7fb2 | 439 | msgbody->msgsize = msgsize; |
39d70a4a HZ |
440 | (*messagecount)++; |
441 | gpadl_body = | |
c50f7fb2 | 442 | (struct vmbus_channel_gpadl_body *)msgbody->msg; |
f4266e34 GKH |
443 | |
444 | /* | |
445 | * FIXME: | |
446 | * Gpadl is u32 and we are using a pointer which could | |
447 | * be 64-bit | |
448 | */ | |
39d70a4a HZ |
449 | /* gpadl_body->Gpadl = kbuffer; */ |
450 | for (i = 0; i < pfncurr; i++) | |
c50f7fb2 | 451 | gpadl_body->pfn[i] = pfn + pfnsum + i; |
3e7ee490 | 452 | |
454f18a9 | 453 | /* add to msg header */ |
c50f7fb2 HZ |
454 | list_add_tail(&msgbody->msglistentry, |
455 | &msgheader->submsglist); | |
39d70a4a HZ |
456 | pfnsum += pfncurr; |
457 | pfnleft -= pfncurr; | |
3e7ee490 | 458 | } |
f4266e34 | 459 | } else { |
454f18a9 | 460 | /* everything fits in a header */ |
39d70a4a | 461 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 462 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
463 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
464 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
465 | if (msgheader == NULL) | |
e3eb7cdd | 466 | goto nomem; |
c50f7fb2 | 467 | msgheader->msgsize = msgsize; |
39d70a4a HZ |
468 | |
469 | gpadl_header = (struct vmbus_channel_gpadl_header *) | |
c50f7fb2 HZ |
470 | msgheader->msg; |
471 | gpadl_header->rangecount = 1; | |
472 | gpadl_header->range_buflen = sizeof(struct gpa_range) + | |
39d70a4a | 473 | pagecount * sizeof(u64); |
415f2287 HZ |
474 | gpadl_header->range[0].byte_offset = 0; |
475 | gpadl_header->range[0].byte_count = size; | |
39d70a4a | 476 | for (i = 0; i < pagecount; i++) |
415f2287 | 477 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
39d70a4a HZ |
478 | |
479 | *msginfo = msgheader; | |
480 | *messagecount = 1; | |
3e7ee490 HJ |
481 | } |
482 | ||
483 | return 0; | |
d1c250bb | 484 | nomem: |
39d70a4a HZ |
485 | kfree(msgheader); |
486 | kfree(msgbody); | |
d1c250bb | 487 | return -ENOMEM; |
3e7ee490 HJ |
488 | } |
489 | ||
3e189519 | 490 | /* |
fff41b2e | 491 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
f4266e34 | 492 | * |
39d70a4a HZ |
493 | * @channel: a channel |
494 | * @kbuffer: from kmalloc | |
495 | * @size: page-size multiple | |
496 | * @gpadl_handle: some funky thing | |
f4266e34 | 497 | */ |
fff41b2e | 498 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
39d70a4a | 499 | u32 size, u32 *gpadl_handle) |
3e7ee490 | 500 | { |
39d70a4a HZ |
501 | struct vmbus_channel_gpadl_header *gpadlmsg; |
502 | struct vmbus_channel_gpadl_body *gpadl_body; | |
82250213 | 503 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
39d70a4a HZ |
504 | struct vmbus_channel_msginfo *msginfo = NULL; |
505 | struct vmbus_channel_msginfo *submsginfo; | |
506 | u32 msgcount; | |
53af545b | 507 | struct list_head *curr; |
39d70a4a | 508 | u32 next_gpadl_handle; |
dd0813b6 | 509 | unsigned long flags; |
c3bf2e26 | 510 | int ret = 0; |
3e7ee490 | 511 | |
da9fcb72 HZ |
512 | next_gpadl_handle = atomic_read(&vmbus_connection.next_gpadl_handle); |
513 | atomic_inc(&vmbus_connection.next_gpadl_handle); | |
3e7ee490 | 514 | |
fff41b2e | 515 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
c3bf2e26 BP |
516 | if (ret) |
517 | return ret; | |
3e7ee490 | 518 | |
0c3b7b2f | 519 | init_waitqueue_head(&msginfo->waitevent); |
c3bf2e26 | 520 | |
c50f7fb2 HZ |
521 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg; |
522 | gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER; | |
523 | gpadlmsg->child_relid = channel->offermsg.child_relid; | |
524 | gpadlmsg->gpadl = next_gpadl_handle; | |
3e7ee490 | 525 | |
fff41b2e | 526 | dump_gpadl_header(gpadlmsg); |
3e7ee490 | 527 | |
15b2f647 | 528 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 529 | list_add_tail(&msginfo->msglistentry, |
da9fcb72 | 530 | &vmbus_connection.chn_msg_list); |
3e7ee490 | 531 | |
15b2f647 | 532 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
f4266e34 | 533 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
39d70a4a | 534 | kbuffer, size, msgcount); |
3e7ee490 | 535 | |
f4266e34 | 536 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
c50f7fb2 | 537 | msginfo->msgsize - sizeof(*msginfo)); |
3e7ee490 | 538 | |
0c3b7b2f | 539 | msginfo->wait_condition = 0; |
c6977677 | 540 | ret = vmbus_post_msg(gpadlmsg, msginfo->msgsize - |
39d70a4a | 541 | sizeof(*msginfo)); |
f4266e34 | 542 | if (ret != 0) { |
3e7ee490 HJ |
543 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
544 | goto Cleanup; | |
545 | } | |
546 | ||
39d70a4a | 547 | if (msgcount > 1) { |
c50f7fb2 | 548 | list_for_each(curr, &msginfo->submsglist) { |
53af545b BP |
549 | |
550 | /* FIXME: should this use list_entry() instead ? */ | |
39d70a4a HZ |
551 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
552 | gpadl_body = | |
c50f7fb2 | 553 | (struct vmbus_channel_gpadl_body *)submsginfo->msg; |
3e7ee490 | 554 | |
c50f7fb2 HZ |
555 | gpadl_body->header.msgtype = |
556 | CHANNELMSG_GPADL_BODY; | |
557 | gpadl_body->gpadl = next_gpadl_handle; | |
3e7ee490 | 558 | |
f4266e34 | 559 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
c50f7fb2 | 560 | submsginfo->msgsize - |
39d70a4a HZ |
561 | sizeof(*submsginfo)); |
562 | ||
c50f7fb2 | 563 | dump_gpadl_body(gpadl_body, submsginfo->msgsize - |
39d70a4a | 564 | sizeof(*submsginfo)); |
c6977677 | 565 | ret = vmbus_post_msg(gpadl_body, |
c50f7fb2 | 566 | submsginfo->msgsize - |
39d70a4a | 567 | sizeof(*submsginfo)); |
fd4dc88e | 568 | if (ret != 0) |
99259159 BP |
569 | goto Cleanup; |
570 | ||
3e7ee490 HJ |
571 | } |
572 | } | |
0c3b7b2f S |
573 | wait_event_timeout(msginfo->waitevent, |
574 | msginfo->wait_condition, | |
575 | msecs_to_jiffies(1000)); | |
576 | BUG_ON(msginfo->wait_condition == 0); | |
577 | ||
3e7ee490 | 578 | |
454f18a9 | 579 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
580 | DPRINT_DBG(VMBUS, "Received GPADL created " |
581 | "(relid %d, status %d handle %x)", | |
c50f7fb2 HZ |
582 | channel->offermsg.child_relid, |
583 | msginfo->response.gpadl_created.creation_status, | |
584 | gpadlmsg->gpadl); | |
3e7ee490 | 585 | |
c50f7fb2 | 586 | *gpadl_handle = gpadlmsg->gpadl; |
3e7ee490 HJ |
587 | |
588 | Cleanup: | |
15b2f647 | 589 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 590 | list_del(&msginfo->msglistentry); |
15b2f647 | 591 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 592 | |
39d70a4a | 593 | kfree(msginfo); |
3e7ee490 HJ |
594 | return ret; |
595 | } | |
98873724 | 596 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
3e7ee490 | 597 | |
3e189519 | 598 | /* |
fff41b2e | 599 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
f4266e34 | 600 | */ |
fff41b2e | 601 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
3e7ee490 | 602 | { |
82250213 | 603 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 604 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 605 | unsigned long flags; |
f4266e34 | 606 | int ret; |
3e7ee490 | 607 | |
39d70a4a | 608 | /* ASSERT(gpadl_handle != 0); */ |
3e7ee490 | 609 | |
f4266e34 GKH |
610 | info = kmalloc(sizeof(*info) + |
611 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
612 | if (!info) |
613 | return -ENOMEM; | |
3e7ee490 | 614 | |
0c3b7b2f | 615 | init_waitqueue_head(&info->waitevent); |
3e7ee490 | 616 | |
c50f7fb2 | 617 | msg = (struct vmbus_channel_gpadl_teardown *)info->msg; |
3e7ee490 | 618 | |
c50f7fb2 HZ |
619 | msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; |
620 | msg->child_relid = channel->offermsg.child_relid; | |
621 | msg->gpadl = gpadl_handle; | |
3e7ee490 | 622 | |
15b2f647 | 623 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 624 | list_add_tail(&info->msglistentry, |
da9fcb72 | 625 | &vmbus_connection.chn_msg_list); |
15b2f647 | 626 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
0c3b7b2f | 627 | info->wait_condition = 0; |
c6977677 | 628 | ret = vmbus_post_msg(msg, |
f4266e34 | 629 | sizeof(struct vmbus_channel_gpadl_teardown)); |
3e7ee490 | 630 | |
0c3b7b2f S |
631 | BUG_ON(ret != 0); |
632 | wait_event_timeout(info->waitevent, | |
633 | info->wait_condition, msecs_to_jiffies(1000)); | |
634 | BUG_ON(info->wait_condition == 0); | |
3e7ee490 | 635 | |
454f18a9 | 636 | /* Received a torndown response */ |
15b2f647 | 637 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
c50f7fb2 | 638 | list_del(&info->msglistentry); |
15b2f647 | 639 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 640 | |
8c69f52a | 641 | kfree(info); |
3e7ee490 HJ |
642 | return ret; |
643 | } | |
18726d7a | 644 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
3e7ee490 | 645 | |
3e189519 | 646 | /* |
fff41b2e | 647 | * vmbus_close - Close the specified channel |
f4266e34 | 648 | */ |
fff41b2e | 649 | void vmbus_close(struct vmbus_channel *channel) |
3e7ee490 | 650 | { |
82250213 | 651 | struct vmbus_channel_close_channel *msg; |
aded7165 | 652 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 653 | unsigned long flags; |
f4266e34 | 654 | int ret; |
3e7ee490 | 655 | |
454f18a9 | 656 | /* Stop callback and cancel the timer asap */ |
c50f7fb2 | 657 | channel->onchannel_callback = NULL; |
39d70a4a | 658 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 659 | |
454f18a9 | 660 | /* Send a closing message */ |
f4266e34 GKH |
661 | info = kmalloc(sizeof(*info) + |
662 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
663 | /* FIXME: can't do anything other than return here because the |
664 | * function is void */ | |
665 | if (!info) | |
666 | return; | |
3e7ee490 | 667 | |
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)); |
3e7ee490 | 674 | |
0c3b7b2f | 675 | BUG_ON(ret != 0); |
454f18a9 | 676 | /* Tear down the gpadl for the channel's ring buffer */ |
c50f7fb2 | 677 | if (channel->ringbuffer_gpadlhandle) |
fff41b2e | 678 | vmbus_teardown_gpadl(channel, |
c50f7fb2 | 679 | channel->ringbuffer_gpadlhandle); |
3e7ee490 | 680 | |
454f18a9 | 681 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 682 | |
454f18a9 | 683 | /* Cleanup the ring buffers for this channel */ |
1ac58644 HZ |
684 | ringbuffer_cleanup(&channel->outbound); |
685 | ringbuffer_cleanup(&channel->inbound); | |
3e7ee490 | 686 | |
df3493e0 S |
687 | free_pages((unsigned long)channel->ringbuffer_pages, |
688 | get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); | |
3e7ee490 | 689 | |
8c69f52a | 690 | kfree(info); |
3e7ee490 | 691 | |
454f18a9 BP |
692 | /* |
693 | * If we are closing the channel during an error path in | |
694 | * opening the channel, don't free the channel since the | |
695 | * caller will free the channel | |
696 | */ | |
697 | ||
c50f7fb2 | 698 | if (channel->state == CHANNEL_OPEN_STATE) { |
15b2f647 | 699 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
c50f7fb2 | 700 | list_del(&channel->listentry); |
15b2f647 | 701 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 702 | |
e98cb276 | 703 | free_channel(channel); |
3e7ee490 | 704 | } |
3e7ee490 | 705 | } |
70bfa307 | 706 | EXPORT_SYMBOL_GPL(vmbus_close); |
3e7ee490 | 707 | |
c88c4e4c | 708 | /** |
fff41b2e | 709 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
39d70a4a HZ |
710 | * @channel: Pointer to vmbus_channel structure. |
711 | * @buffer: Pointer to the buffer you want to receive the data into. | |
712 | * @bufferlen: Maximum size of what the the buffer will hold | |
713 | * @requestid: Identifier of the request | |
714 | * @type: Type of packet that is being send e.g. negotiate, time | |
c88c4e4c HJ |
715 | * packet etc. |
716 | * | |
39d70a4a | 717 | * Sends data in @buffer directly to hyper-v via the vmbus |
c88c4e4c HJ |
718 | * This will send the data unparsed to hyper-v. |
719 | * | |
720 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 721 | */ |
fff41b2e | 722 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
39d70a4a HZ |
723 | u32 bufferlen, u64 requestid, |
724 | enum vmbus_packet_type type, u32 flags) | |
3e7ee490 | 725 | { |
8dc0a06a | 726 | struct vmpacket_descriptor desc; |
39d70a4a | 727 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
73509681 | 728 | u32 packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
39d70a4a HZ |
729 | struct scatterlist bufferlist[3]; |
730 | u64 aligned_data = 0; | |
f4266e34 | 731 | int ret; |
3e7ee490 | 732 | |
f4266e34 | 733 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
39d70a4a | 734 | channel, buffer, bufferlen); |
3e7ee490 | 735 | |
fff41b2e | 736 | dump_vmbus_channel(channel); |
3e7ee490 | 737 | |
0ace247e | 738 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 739 | |
454f18a9 | 740 | /* Setup the descriptor */ |
415f2287 HZ |
741 | desc.type = type; /* VmbusPacketTypeDataInBand; */ |
742 | desc.flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 | 743 | /* in 8-bytes granularity */ |
415f2287 HZ |
744 | desc.offset8 = sizeof(struct vmpacket_descriptor) >> 3; |
745 | desc.len8 = (u16)(packetlen_aligned >> 3); | |
746 | desc.trans_id = requestid; | |
3e7ee490 | 747 | |
39d70a4a HZ |
748 | sg_init_table(bufferlist, 3); |
749 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); | |
750 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
751 | sg_set_buf(&bufferlist[2], &aligned_data, | |
752 | packetlen_aligned - packetlen); | |
3e7ee490 | 753 | |
1ac58644 | 754 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 755 | |
454f18a9 | 756 | /* TODO: We should determine if this is optional */ |
1ac58644 | 757 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 758 | vmbus_setevent(channel); |
3e7ee490 | 759 | |
3e7ee490 HJ |
760 | return ret; |
761 | } | |
fff41b2e | 762 | EXPORT_SYMBOL(vmbus_sendpacket); |
3e7ee490 | 763 | |
3e189519 | 764 | /* |
fff41b2e | 765 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
3e189519 | 766 | * packets using a GPADL Direct packet type. |
f4266e34 | 767 | */ |
fff41b2e | 768 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
769 | struct hv_page_buffer pagebuffers[], |
770 | u32 pagecount, void *buffer, u32 bufferlen, | |
771 | u64 requestid) | |
3e7ee490 | 772 | { |
f4266e34 GKH |
773 | int ret; |
774 | int i; | |
430a8e9a | 775 | struct vmbus_channel_packet_page_buffer desc; |
39d70a4a HZ |
776 | u32 descsize; |
777 | u32 packetlen; | |
778 | u32 packetlen_aligned; | |
779 | struct scatterlist bufferlist[3]; | |
780 | u64 aligned_data = 0; | |
3e7ee490 | 781 | |
39d70a4a | 782 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
002b53ea | 783 | return -EINVAL; |
3e7ee490 | 784 | |
fff41b2e | 785 | dump_vmbus_channel(channel); |
3e7ee490 | 786 | |
f4266e34 | 787 | /* |
430a8e9a | 788 | * Adjust the size down since vmbus_channel_packet_page_buffer is the |
f4266e34 GKH |
789 | * largest size we support |
790 | */ | |
39d70a4a HZ |
791 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
792 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * | |
f4266e34 | 793 | sizeof(struct hv_page_buffer)); |
39d70a4a | 794 | packetlen = descsize + bufferlen; |
73509681 | 795 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
3e7ee490 | 796 | |
0ace247e | 797 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 798 | |
454f18a9 | 799 | /* Setup the descriptor */ |
415f2287 | 800 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
430a8e9a | 801 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
39d70a4a HZ |
802 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
803 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
804 | desc.transactionid = requestid; | |
805 | desc.rangecount = pagecount; | |
806 | ||
807 | for (i = 0; i < pagecount; i++) { | |
ca623ad3 HZ |
808 | desc.range[i].len = pagebuffers[i].len; |
809 | desc.range[i].offset = pagebuffers[i].offset; | |
810 | desc.range[i].pfn = pagebuffers[i].pfn; | |
3e7ee490 HJ |
811 | } |
812 | ||
39d70a4a HZ |
813 | sg_init_table(bufferlist, 3); |
814 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
815 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
816 | sg_set_buf(&bufferlist[2], &aligned_data, | |
817 | packetlen_aligned - packetlen); | |
3e7ee490 | 818 | |
1ac58644 | 819 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 820 | |
454f18a9 | 821 | /* TODO: We should determine if this is optional */ |
1ac58644 | 822 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 823 | vmbus_setevent(channel); |
3e7ee490 | 824 | |
3e7ee490 HJ |
825 | return ret; |
826 | } | |
713efeb4 | 827 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); |
3e7ee490 | 828 | |
3e189519 | 829 | /* |
fff41b2e | 830 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
3e189519 | 831 | * using a GPADL Direct packet type. |
f4266e34 | 832 | */ |
fff41b2e | 833 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
834 | struct hv_multipage_buffer *multi_pagebuffer, |
835 | void *buffer, u32 bufferlen, u64 requestid) | |
3e7ee490 | 836 | { |
f4266e34 | 837 | int ret; |
430a8e9a | 838 | struct vmbus_channel_packet_multipage_buffer desc; |
39d70a4a HZ |
839 | u32 descsize; |
840 | u32 packetlen; | |
841 | u32 packetlen_aligned; | |
842 | struct scatterlist bufferlist[3]; | |
843 | u64 aligned_data = 0; | |
ca623ad3 HZ |
844 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, |
845 | multi_pagebuffer->len); | |
3e7ee490 | 846 | |
fff41b2e | 847 | dump_vmbus_channel(channel); |
3e7ee490 | 848 | |
f4266e34 | 849 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
ca623ad3 HZ |
850 | multi_pagebuffer->offset, |
851 | multi_pagebuffer->len, pfncount); | |
3e7ee490 | 852 | |
39d70a4a | 853 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
002b53ea | 854 | return -EINVAL; |
3e7ee490 | 855 | |
f4266e34 | 856 | /* |
430a8e9a | 857 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
f4266e34 GKH |
858 | * the largest size we support |
859 | */ | |
39d70a4a HZ |
860 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
861 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * | |
f4266e34 | 862 | sizeof(u64)); |
39d70a4a | 863 | packetlen = descsize + bufferlen; |
73509681 | 864 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
3e7ee490 | 865 | |
0ace247e | 866 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 867 | |
454f18a9 | 868 | /* Setup the descriptor */ |
415f2287 | 869 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
430a8e9a | 870 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
39d70a4a HZ |
871 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
872 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
873 | desc.transactionid = requestid; | |
430a8e9a | 874 | desc.rangecount = 1; |
3e7ee490 | 875 | |
ca623ad3 HZ |
876 | desc.range.len = multi_pagebuffer->len; |
877 | desc.range.offset = multi_pagebuffer->offset; | |
3e7ee490 | 878 | |
ca623ad3 | 879 | memcpy(desc.range.pfn_array, multi_pagebuffer->pfn_array, |
39d70a4a | 880 | pfncount * sizeof(u64)); |
3e7ee490 | 881 | |
39d70a4a HZ |
882 | sg_init_table(bufferlist, 3); |
883 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
884 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
885 | sg_set_buf(&bufferlist[2], &aligned_data, | |
886 | packetlen_aligned - packetlen); | |
3e7ee490 | 887 | |
1ac58644 | 888 | ret = ringbuffer_write(&channel->outbound, bufferlist, 3); |
3e7ee490 | 889 | |
454f18a9 | 890 | /* TODO: We should determine if this is optional */ |
1ac58644 | 891 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
fff41b2e | 892 | vmbus_setevent(channel); |
3e7ee490 | 893 | |
3e7ee490 HJ |
894 | return ret; |
895 | } | |
4cb106fa | 896 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
c88c4e4c HJ |
897 | |
898 | /** | |
fff41b2e | 899 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
39d70a4a HZ |
900 | * @channel: Pointer to vmbus_channel structure. |
901 | * @buffer: Pointer to the buffer you want to receive the data into. | |
902 | * @bufferlen: Maximum size of what the the buffer will hold | |
903 | * @buffer_actual_len: The actual size of the data after it was received | |
904 | * @requestid: Identifier of the request | |
c88c4e4c HJ |
905 | * |
906 | * Receives directly from the hyper-v vmbus and puts the data it received | |
907 | * into Buffer. This will receive the data unparsed from hyper-v. | |
908 | * | |
909 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 910 | */ |
fff41b2e | 911 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
39d70a4a | 912 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
3e7ee490 | 913 | { |
8dc0a06a | 914 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
915 | u32 packetlen; |
916 | u32 userlen; | |
3e7ee490 | 917 | int ret; |
54411c42 | 918 | unsigned long flags; |
3e7ee490 | 919 | |
39d70a4a HZ |
920 | *buffer_actual_len = 0; |
921 | *requestid = 0; | |
3e7ee490 | 922 | |
39d70a4a | 923 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 924 | |
1ac58644 | 925 | ret = ringbuffer_peek(&channel->inbound, &desc, |
f4266e34 GKH |
926 | sizeof(struct vmpacket_descriptor)); |
927 | if (ret != 0) { | |
39d70a4a | 928 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 929 | |
454f18a9 | 930 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
931 | return 0; |
932 | } | |
933 | ||
454f18a9 | 934 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 935 | |
415f2287 HZ |
936 | packetlen = desc.len8 << 3; |
937 | userlen = packetlen - (desc.offset8 << 3); | |
454f18a9 | 938 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 939 | |
f4266e34 GKH |
940 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
941 | "flag %d tid %llx pktlen %d datalen %d> ", | |
415f2287 HZ |
942 | channel, channel->offermsg.child_relid, desc.type, |
943 | desc.flags, desc.trans_id, packetlen, userlen); | |
3e7ee490 | 944 | |
39d70a4a | 945 | *buffer_actual_len = userlen; |
3e7ee490 | 946 | |
39d70a4a HZ |
947 | if (userlen > bufferlen) { |
948 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 949 | |
f4266e34 | 950 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
39d70a4a | 951 | bufferlen, userlen); |
3e7ee490 HJ |
952 | return -1; |
953 | } | |
954 | ||
415f2287 | 955 | *requestid = desc.trans_id; |
3e7ee490 | 956 | |
454f18a9 | 957 | /* Copy over the packet to the user buffer */ |
1ac58644 | 958 | ret = ringbuffer_read(&channel->inbound, buffer, userlen, |
415f2287 | 959 | (desc.offset8 << 3)); |
3e7ee490 | 960 | |
39d70a4a | 961 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 962 | |
3e7ee490 HJ |
963 | return 0; |
964 | } | |
fff41b2e | 965 | EXPORT_SYMBOL(vmbus_recvpacket); |
3e7ee490 | 966 | |
3e189519 | 967 | /* |
fff41b2e | 968 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
f4266e34 | 969 | */ |
fff41b2e | 970 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
39d70a4a HZ |
971 | u32 bufferlen, u32 *buffer_actual_len, |
972 | u64 *requestid) | |
3e7ee490 | 973 | { |
8dc0a06a | 974 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
975 | u32 packetlen; |
976 | u32 userlen; | |
3e7ee490 | 977 | int ret; |
54411c42 | 978 | unsigned long flags; |
3e7ee490 | 979 | |
39d70a4a HZ |
980 | *buffer_actual_len = 0; |
981 | *requestid = 0; | |
3e7ee490 | 982 | |
39d70a4a | 983 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 984 | |
1ac58644 | 985 | ret = ringbuffer_peek(&channel->inbound, &desc, |
f4266e34 GKH |
986 | sizeof(struct vmpacket_descriptor)); |
987 | if (ret != 0) { | |
39d70a4a | 988 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 989 | |
454f18a9 | 990 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
991 | return 0; |
992 | } | |
993 | ||
454f18a9 | 994 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 995 | |
415f2287 HZ |
996 | packetlen = desc.len8 << 3; |
997 | userlen = packetlen - (desc.offset8 << 3); | |
3e7ee490 | 998 | |
f4266e34 GKH |
999 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
1000 | "flag %d tid %llx pktlen %d datalen %d> ", | |
415f2287 HZ |
1001 | channel, channel->offermsg.child_relid, desc.type, |
1002 | desc.flags, desc.trans_id, packetlen, userlen); | |
3e7ee490 | 1003 | |
39d70a4a | 1004 | *buffer_actual_len = packetlen; |
3e7ee490 | 1005 | |
39d70a4a HZ |
1006 | if (packetlen > bufferlen) { |
1007 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 1008 | |
f4266e34 | 1009 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
39d70a4a | 1010 | "got space for only %d bytes", packetlen, bufferlen); |
3e7ee490 HJ |
1011 | return -2; |
1012 | } | |
1013 | ||
415f2287 | 1014 | *requestid = desc.trans_id; |
3e7ee490 | 1015 | |
454f18a9 | 1016 | /* Copy over the entire packet to the user buffer */ |
1ac58644 | 1017 | ret = ringbuffer_read(&channel->inbound, buffer, packetlen, 0); |
3e7ee490 | 1018 | |
39d70a4a | 1019 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
1020 | return 0; |
1021 | } | |
adaee6bd | 1022 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
3e7ee490 | 1023 | |
3e189519 | 1024 | /* |
fff41b2e | 1025 | * vmbus_onchannel_event - Channel event callback |
f4266e34 | 1026 | */ |
fff41b2e | 1027 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
3e7ee490 | 1028 | { |
fff41b2e | 1029 | dump_vmbus_channel(channel); |
0ace247e | 1030 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 1031 | |
c50f7fb2 | 1032 | channel->onchannel_callback(channel->channel_callback_context); |
5996b3dd | 1033 | |
39d70a4a | 1034 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
3e7ee490 HJ |
1035 | } |
1036 | ||
3e189519 | 1037 | /* |
fff41b2e | 1038 | * vmbus_ontimer - Timer event callback |
f4266e34 | 1039 | */ |
fff41b2e | 1040 | void vmbus_ontimer(unsigned long data) |
3e7ee490 | 1041 | { |
aded7165 | 1042 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1043 | |
c50f7fb2 HZ |
1044 | if (channel->onchannel_callback) |
1045 | channel->onchannel_callback(channel->channel_callback_context); | |
3e7ee490 HJ |
1046 | } |
1047 | ||
3e189519 | 1048 | /* |
fff41b2e | 1049 | * dump_vmbus_channel- Dump vmbus channel info to the console |
f4266e34 | 1050 | */ |
fff41b2e | 1051 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
3e7ee490 | 1052 | { |
c50f7fb2 | 1053 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->offermsg.child_relid); |
1ac58644 HZ |
1054 | dump_ring_info(&channel->outbound, "Outbound "); |
1055 | dump_ring_info(&channel->inbound, "Inbound "); | |
3e7ee490 | 1056 | } |