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