Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) 2009, Microsoft Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 16 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 17 | * |
| 18 | * Authors: |
| 19 | * Haiyang Zhang <haiyangz@microsoft.com> |
| 20 | * Hank Janssen <hjanssen@microsoft.com> |
| 21 | * |
| 22 | */ |
| 23 | |
Greg Kroah-Hartman | 5654e93 | 2009-07-14 15:08:20 -0700 | [diff] [blame] | 24 | #include <linux/kernel.h> |
Greg Kroah-Hartman | a0086dc | 2009-08-17 17:22:08 -0700 | [diff] [blame] | 25 | #include <linux/mm.h> |
Greg Kroah-Hartman | 4983b39 | 2009-08-19 16:14:47 -0700 | [diff] [blame] | 26 | #include "osd.h" |
Greg Kroah-Hartman | 09d50ff | 2009-07-13 17:09:34 -0700 | [diff] [blame] | 27 | #include "include/logging.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 28 | |
| 29 | #include "VmbusPrivate.h" |
| 30 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 31 | /* Internal routines */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 32 | static int VmbusChannelCreateGpadlHeader( |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 33 | void * Kbuffer, /* must be phys and virt contiguous */ |
| 34 | u32 Size, /* page-size multiple */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 35 | struct vmbus_channel_msginfo **msgInfo, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 36 | u32 *MessageCount |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 37 | ); |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 38 | static void DumpVmbusChannel(struct vmbus_channel *channel); |
| 39 | static void VmbusChannelSetEvent(struct vmbus_channel *channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 40 | |
| 41 | |
| 42 | #if 0 |
| 43 | static void |
| 44 | DumpMonitorPage( |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 45 | struct hv_monitor_page *MonitorPage |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 46 | ) |
| 47 | { |
| 48 | int i=0; |
| 49 | int j=0; |
| 50 | |
| 51 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", MonitorPage, MonitorPage->TriggerState); |
| 52 | |
| 53 | for (i=0; i<4; i++) |
| 54 | { |
| 55 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, MonitorPage->TriggerGroup[i].AsUINT64); |
| 56 | } |
| 57 | |
| 58 | for (i=0; i<4; i++) |
| 59 | { |
| 60 | for (j=0; j<32; j++) |
| 61 | { |
| 62 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, MonitorPage->Latency[i][j]); |
| 63 | } |
| 64 | } |
| 65 | for (i=0; i<4; i++) |
| 66 | { |
| 67 | for (j=0; j<32; j++) |
| 68 | { |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 69 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].ConnectionId.Asu32); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 70 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].FlagNumber); |
| 71 | |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | #endif |
| 76 | |
| 77 | /*++ |
| 78 | |
| 79 | Name: |
| 80 | VmbusChannelSetEvent() |
| 81 | |
| 82 | Description: |
| 83 | Trigger an event notification on the specified channel. |
| 84 | |
| 85 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 86 | static void VmbusChannelSetEvent(struct vmbus_channel *Channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 87 | { |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 88 | struct hv_monitor_page *monitorPage; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 89 | |
| 90 | DPRINT_ENTER(VMBUS); |
| 91 | |
| 92 | if (Channel->OfferMsg.MonitorAllocated) |
| 93 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 94 | /* Each u32 represents 32 channels */ |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 95 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
| 96 | (unsigned long *) gVmbusConnection.SendInterruptPage + |
| 97 | (Channel->OfferMsg.ChildRelId >> 5) ); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 98 | |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 99 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 100 | monitorPage++; /* Get the child to parent monitor page */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 101 | |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 102 | set_bit(Channel->MonitorBit, |
| 103 | (unsigned long *) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending); |
| 104 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 105 | } |
| 106 | else |
| 107 | { |
| 108 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); |
| 109 | } |
| 110 | |
| 111 | DPRINT_EXIT(VMBUS); |
| 112 | } |
| 113 | |
| 114 | #if 0 |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 115 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 116 | { |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 117 | struct hv_monitor_page *monitorPage; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 118 | |
| 119 | DPRINT_ENTER(VMBUS); |
| 120 | |
| 121 | if (Channel->OfferMsg.MonitorAllocated) |
| 122 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 123 | /* Each u32 represents 32 channels */ |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 124 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
| 125 | (unsigned long *) gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 126 | |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 127 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 128 | monitorPage++; /* Get the child to parent monitor page */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 129 | |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 130 | clear_bit(Channel->MonitorBit, |
| 131 | (unsigned long *) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | DPRINT_EXIT(VMBUS); |
| 135 | } |
| 136 | |
| 137 | #endif |
| 138 | /*++; |
| 139 | |
| 140 | Name: |
| 141 | VmbusChannelGetDebugInfo() |
| 142 | |
| 143 | Description: |
| 144 | Retrieve various channel debug info |
| 145 | |
| 146 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 147 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
| 148 | struct vmbus_channel_debug_info *DebugInfo) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 149 | { |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 150 | struct hv_monitor_page *monitorPage; |
Greg Kroah-Hartman | 5654e93 | 2009-07-14 15:08:20 -0700 | [diff] [blame] | 151 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
| 152 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 153 | /* u32 monitorBit = 1 << monitorOffset; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 154 | |
| 155 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; |
| 156 | DebugInfo->State = Channel->State; |
Greg Kroah-Hartman | caf26a3 | 2009-08-19 16:17:03 -0700 | [diff] [blame] | 157 | memcpy(&DebugInfo->InterfaceType, &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); |
| 158 | memcpy(&DebugInfo->InterfaceInstance, &Channel->OfferMsg.Offer.InterfaceInstance, sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 159 | |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 160 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 161 | |
| 162 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; |
| 163 | |
| 164 | DebugInfo->ServerMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; |
| 165 | DebugInfo->ServerMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; |
| 166 | DebugInfo->ServerMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; |
| 167 | |
| 168 | monitorPage++; |
| 169 | |
| 170 | DebugInfo->ClientMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; |
| 171 | DebugInfo->ClientMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; |
| 172 | DebugInfo->ClientMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; |
| 173 | |
| 174 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); |
| 175 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); |
| 176 | } |
| 177 | |
| 178 | |
| 179 | /*++; |
| 180 | |
| 181 | Name: |
| 182 | VmbusChannelOpen() |
| 183 | |
| 184 | Description: |
| 185 | Open the specified channel. |
| 186 | |
| 187 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 188 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 189 | u32 SendRingBufferSize, |
| 190 | u32 RecvRingBufferSize, |
Greg Kroah-Hartman | 8282c40 | 2009-07-14 15:06:28 -0700 | [diff] [blame] | 191 | void * UserData, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 192 | u32 UserDataLen, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 193 | PFN_CHANNEL_CALLBACK pfnOnChannelCallback, |
Greg Kroah-Hartman | 8282c40 | 2009-07-14 15:06:28 -0700 | [diff] [blame] | 194 | void * Context |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 195 | ) |
| 196 | { |
| 197 | int ret=0; |
| 198 | VMBUS_CHANNEL_OPEN_CHANNEL* openMsg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 199 | struct vmbus_channel_msginfo *openInfo; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 200 | void *in, *out; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 201 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 202 | |
| 203 | DPRINT_ENTER(VMBUS); |
| 204 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 205 | /* Aligned to page size */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 206 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE -1))); |
| 207 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE -1))); |
| 208 | |
| 209 | NewChannel->OnChannelCallback = pfnOnChannelCallback; |
| 210 | NewChannel->ChannelCallbackContext = Context; |
| 211 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 212 | /* Allocate the ring buffer */ |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 213 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 214 | /* out = kzalloc(sendRingBufferSize + recvRingBufferSize, GFP_KERNEL); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 215 | ASSERT(out); |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 216 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 217 | |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 218 | in = (void*)((unsigned long)out + SendRingBufferSize); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 219 | |
| 220 | NewChannel->RingBufferPages = out; |
| 221 | NewChannel->RingBufferPageCount = (SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT; |
| 222 | |
| 223 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); |
| 224 | |
| 225 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); |
| 226 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 227 | /* Establish the gpadl for the ring buffer */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 228 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", NewChannel); |
| 229 | |
| 230 | NewChannel->RingBufferGpadlHandle = 0; |
| 231 | |
| 232 | ret = VmbusChannelEstablishGpadl(NewChannel, |
| 233 | NewChannel->Outbound.RingBuffer, |
| 234 | SendRingBufferSize + RecvRingBufferSize, |
| 235 | &NewChannel->RingBufferGpadlHandle); |
| 236 | |
| 237 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p size %d recv ring %p size %d, downstreamoffset %d>", |
| 238 | NewChannel, |
| 239 | NewChannel->OfferMsg.ChildRelId, |
| 240 | NewChannel->RingBufferGpadlHandle, |
| 241 | NewChannel->Outbound.RingBuffer, |
| 242 | NewChannel->Outbound.RingSize, |
| 243 | NewChannel->Inbound.RingBuffer, |
| 244 | NewChannel->Inbound.RingSize, |
| 245 | SendRingBufferSize); |
| 246 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 247 | /* Create and init the channel open message */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 248 | openInfo = kmalloc(sizeof(*openInfo) + sizeof(VMBUS_CHANNEL_OPEN_CHANNEL), GFP_KERNEL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 249 | ASSERT(openInfo != NULL); |
| 250 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 251 | openInfo->WaitEvent = osd_WaitEventCreate(); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 252 | |
| 253 | openMsg = (VMBUS_CHANNEL_OPEN_CHANNEL*)openInfo->Msg; |
| 254 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 255 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 256 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; |
| 257 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; |
| 258 | ASSERT(openMsg->RingBufferGpadlHandle); |
| 259 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> PAGE_SHIFT; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 260 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 261 | |
| 262 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); |
| 263 | if (UserDataLen) |
| 264 | { |
| 265 | memcpy(openMsg->UserData, UserData, UserDataLen); |
| 266 | } |
| 267 | |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 268 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 269 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &openInfo->MsgListEntry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 270 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 271 | |
| 272 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); |
| 273 | |
| 274 | ret = VmbusPostMessage(openMsg, sizeof(VMBUS_CHANNEL_OPEN_CHANNEL)); |
| 275 | if (ret != 0) |
| 276 | { |
| 277 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
| 278 | goto Cleanup; |
| 279 | } |
| 280 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 281 | /* FIXME: Need to time-out here */ |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 282 | osd_WaitEventWait(openInfo->WaitEvent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 283 | |
| 284 | if (openInfo->Response.OpenResult.Status == 0) |
| 285 | { |
| 286 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
| 287 | } |
| 288 | else |
| 289 | { |
| 290 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", NewChannel, openInfo->Response.OpenResult.Status); |
| 291 | } |
| 292 | |
| 293 | Cleanup: |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 294 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 295 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 296 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 297 | |
Bill Pemberton | 420beac | 2009-07-29 17:00:10 -0400 | [diff] [blame] | 298 | kfree(openInfo->WaitEvent); |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 299 | kfree(openInfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 300 | |
| 301 | DPRINT_EXIT(VMBUS); |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /*++; |
| 307 | |
| 308 | Name: |
| 309 | DumpGpadlBody() |
| 310 | |
| 311 | Description: |
| 312 | Dump the gpadl body message to the console for debugging purposes. |
| 313 | |
| 314 | --*/ |
| 315 | static void DumpGpadlBody( |
| 316 | VMBUS_CHANNEL_GPADL_BODY *Gpadl, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 317 | u32 Len) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 318 | { |
| 319 | int i=0; |
| 320 | int pfnCount=0; |
| 321 | |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 322 | pfnCount = (Len - sizeof(VMBUS_CHANNEL_GPADL_BODY))/ sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 323 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
| 324 | |
| 325 | for (i=0; i< pfnCount; i++) |
| 326 | { |
| 327 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", i, Gpadl->Pfn[i]); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | |
| 332 | /*++; |
| 333 | |
| 334 | Name: |
| 335 | DumpGpadlHeader() |
| 336 | |
| 337 | Description: |
| 338 | Dump the gpadl header message to the console for debugging purposes. |
| 339 | |
| 340 | --*/ |
| 341 | static void DumpGpadlHeader( |
| 342 | VMBUS_CHANNEL_GPADL_HEADER *Gpadl |
| 343 | ) |
| 344 | { |
| 345 | int i=0,j=0; |
| 346 | int pageCount=0; |
| 347 | |
| 348 | |
| 349 | DPRINT_DBG(VMBUS, "gpadl header - relid %d, range count %d, range buflen %d", |
| 350 | Gpadl->ChildRelId, |
| 351 | Gpadl->RangeCount, |
| 352 | Gpadl->RangeBufLen); |
| 353 | for (i=0; i< Gpadl->RangeCount; i++) |
| 354 | { |
| 355 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
| 356 | pageCount = (pageCount > 26)? 26 : pageCount; |
| 357 | |
| 358 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d page count %d", |
| 359 | i, Gpadl->Range[i].ByteCount, Gpadl->Range[i].ByteOffset, pageCount); |
| 360 | |
| 361 | for (j=0; j< pageCount; j++) |
| 362 | { |
| 363 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, Gpadl->Range[i].PfnArray[j]); |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | /*++; |
| 369 | |
| 370 | Name: |
| 371 | VmbusChannelCreateGpadlHeader() |
| 372 | |
| 373 | Description: |
| 374 | Creates a gpadl for the specified buffer |
| 375 | |
| 376 | --*/ |
| 377 | static int |
| 378 | VmbusChannelCreateGpadlHeader( |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 379 | void * Kbuffer, /* from kmalloc() */ |
| 380 | u32 Size, /* page-size multiple */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 381 | struct vmbus_channel_msginfo **MsgInfo, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 382 | u32 *MessageCount) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 383 | { |
| 384 | int i; |
| 385 | int pageCount; |
| 386 | unsigned long long pfn; |
| 387 | VMBUS_CHANNEL_GPADL_HEADER* gpaHeader; |
| 388 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 389 | struct vmbus_channel_msginfo *msgHeader; |
| 390 | struct vmbus_channel_msginfo *msgBody; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 391 | u32 msgSize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 392 | |
| 393 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; |
| 394 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 395 | /* ASSERT( (kbuffer & (PAGE_SIZE-1)) == 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 396 | ASSERT( (Size & (PAGE_SIZE-1)) == 0); |
| 397 | |
| 398 | pageCount = Size >> PAGE_SHIFT; |
Greg Kroah-Hartman | fa56d36 | 2009-07-29 15:39:27 -0700 | [diff] [blame] | 399 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 400 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 401 | /* do we need a gpadl body msg */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 402 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_HEADER) - sizeof(GPA_RANGE); |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 403 | pfnCount = pfnSize / sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 404 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 405 | if (pageCount > pfnCount) /* we need a gpadl body */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 406 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 407 | /* fill in the header */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 408 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pfnCount*sizeof(u64); |
Greg Kroah-Hartman | e276a3a | 2009-07-15 12:47:43 -0700 | [diff] [blame] | 409 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 410 | |
| 411 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); |
| 412 | msgHeader->MessageSize=msgSize; |
| 413 | |
| 414 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; |
| 415 | gpaHeader->RangeCount = 1; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 416 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 417 | gpaHeader->Range[0].ByteOffset = 0; |
| 418 | gpaHeader->Range[0].ByteCount = Size; |
| 419 | for (i=0; i<pfnCount; i++) |
| 420 | { |
| 421 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
| 422 | } |
| 423 | *MsgInfo = msgHeader; |
| 424 | *MessageCount = 1; |
| 425 | |
| 426 | pfnSum = pfnCount; |
| 427 | pfnLeft = pageCount - pfnCount; |
| 428 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 429 | /* how many pfns can we fit */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 430 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_BODY); |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 431 | pfnCount = pfnSize / sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 432 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 433 | /* fill in the body */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 434 | while (pfnLeft) |
| 435 | { |
| 436 | if (pfnLeft > pfnCount) |
| 437 | { |
| 438 | pfnCurr = pfnCount; |
| 439 | } |
| 440 | else |
| 441 | { |
| 442 | pfnCurr = pfnLeft; |
| 443 | } |
| 444 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 445 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(VMBUS_CHANNEL_GPADL_BODY) + pfnCurr*sizeof(u64); |
Greg Kroah-Hartman | e276a3a | 2009-07-15 12:47:43 -0700 | [diff] [blame] | 446 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 447 | ASSERT(msgBody); |
| 448 | msgBody->MessageSize = msgSize; |
| 449 | (*MessageCount)++; |
| 450 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)msgBody->Msg; |
| 451 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 452 | /* FIXME: Gpadl is u32 and we are using a pointer which could be 64-bit */ |
| 453 | /* gpadlBody->Gpadl = kbuffer; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 454 | for (i=0; i<pfnCurr; i++) |
| 455 | { |
| 456 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
| 457 | } |
| 458 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 459 | /* add to msg header */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 460 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, &msgBody->MsgListEntry); |
| 461 | pfnSum += pfnCurr; |
| 462 | pfnLeft -= pfnCurr; |
| 463 | } |
| 464 | } |
| 465 | else |
| 466 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 467 | /* everything fits in a header */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 468 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
Greg Kroah-Hartman | e276a3a | 2009-07-15 12:47:43 -0700 | [diff] [blame] | 469 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 470 | msgHeader->MessageSize=msgSize; |
| 471 | |
| 472 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; |
| 473 | gpaHeader->RangeCount = 1; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 474 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 475 | gpaHeader->Range[0].ByteOffset = 0; |
| 476 | gpaHeader->Range[0].ByteCount = Size; |
| 477 | for (i=0; i<pageCount; i++) |
| 478 | { |
| 479 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
| 480 | } |
| 481 | |
| 482 | *MsgInfo = msgHeader; |
| 483 | *MessageCount = 1; |
| 484 | } |
| 485 | |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | |
| 490 | /*++; |
| 491 | |
| 492 | Name: |
| 493 | VmbusChannelEstablishGpadl() |
| 494 | |
| 495 | Description: |
| 496 | Estabish a GPADL for the specified buffer |
| 497 | |
| 498 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 499 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 500 | void * Kbuffer, /* from kmalloc() */ |
| 501 | u32 Size, /* page-size multiple */ |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 502 | u32 *GpadlHandle |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 503 | ) |
| 504 | { |
| 505 | int ret=0; |
| 506 | VMBUS_CHANNEL_GPADL_HEADER* gpadlMsg; |
| 507 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 508 | /* VMBUS_CHANNEL_GPADL_CREATED* gpadlCreated; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 509 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 510 | struct vmbus_channel_msginfo *msgInfo; |
| 511 | struct vmbus_channel_msginfo *subMsgInfo; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 512 | |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 513 | u32 msgCount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 514 | LIST_ENTRY* anchor; |
| 515 | LIST_ENTRY* curr; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 516 | u32 nextGpadlHandle; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 517 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 518 | |
| 519 | DPRINT_ENTER(VMBUS); |
| 520 | |
Bill Pemberton | f488841 | 2009-07-29 17:00:12 -0400 | [diff] [blame] | 521 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
| 522 | atomic_inc(&gVmbusConnection.NextGpadlHandle); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 523 | |
| 524 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); |
| 525 | ASSERT(msgInfo != NULL); |
| 526 | ASSERT(msgCount >0); |
| 527 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 528 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 529 | gpadlMsg = (VMBUS_CHANNEL_GPADL_HEADER*)msgInfo->Msg; |
| 530 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
| 531 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; |
| 532 | gpadlMsg->Gpadl = nextGpadlHandle; |
| 533 | |
| 534 | DumpGpadlHeader(gpadlMsg); |
| 535 | |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 536 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 537 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 538 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 539 | |
| 540 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); |
| 541 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 542 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", msgInfo->MessageSize - sizeof(*msgInfo)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 543 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 544 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(*msgInfo)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 545 | if (ret != 0) |
| 546 | { |
| 547 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
| 548 | goto Cleanup; |
| 549 | } |
| 550 | |
| 551 | if (msgCount>1) |
| 552 | { |
| 553 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) |
| 554 | { |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 555 | subMsgInfo = (struct vmbus_channel_msginfo*)curr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 556 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)subMsgInfo->Msg; |
| 557 | |
| 558 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; |
| 559 | gpadlBody->Gpadl = nextGpadlHandle; |
| 560 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 561 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 562 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 563 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
| 564 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 565 | ASSERT(ret == 0); |
| 566 | } |
| 567 | } |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 568 | osd_WaitEventWait(msgInfo->WaitEvent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 569 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 570 | /* At this point, we received the gpadl created msg */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 571 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", |
| 572 | Channel->OfferMsg.ChildRelId, |
| 573 | msgInfo->Response.GpadlCreated.CreationStatus, |
| 574 | gpadlMsg->Gpadl); |
| 575 | |
| 576 | *GpadlHandle = gpadlMsg->Gpadl; |
| 577 | |
| 578 | Cleanup: |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 579 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 580 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 581 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 582 | |
Bill Pemberton | 420beac | 2009-07-29 17:00:10 -0400 | [diff] [blame] | 583 | kfree(msgInfo->WaitEvent); |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 584 | kfree(msgInfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 585 | |
| 586 | DPRINT_EXIT(VMBUS); |
| 587 | |
| 588 | return ret; |
| 589 | } |
| 590 | |
| 591 | |
| 592 | |
| 593 | /*++; |
| 594 | |
| 595 | Name: |
| 596 | VmbusChannelTeardownGpadl() |
| 597 | |
| 598 | Description: |
| 599 | Teardown the specified GPADL handle |
| 600 | |
| 601 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 602 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 603 | { |
| 604 | int ret=0; |
| 605 | VMBUS_CHANNEL_GPADL_TEARDOWN *msg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 606 | struct vmbus_channel_msginfo *info; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 607 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 608 | |
| 609 | DPRINT_ENTER(VMBUS); |
| 610 | |
| 611 | ASSERT(GpadlHandle != 0); |
| 612 | |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 613 | info = kmalloc(sizeof(*info) + sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN), GFP_KERNEL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 614 | ASSERT(info != NULL); |
| 615 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 616 | info->WaitEvent = osd_WaitEventCreate(); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 617 | |
| 618 | msg = (VMBUS_CHANNEL_GPADL_TEARDOWN*)info->Msg; |
| 619 | |
| 620 | msg->Header.MessageType = ChannelMessageGpadlTeardown; |
| 621 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
| 622 | msg->Gpadl = GpadlHandle; |
| 623 | |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 624 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 625 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 626 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 627 | |
| 628 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); |
| 629 | if (ret != 0) |
| 630 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 631 | /* TODO: */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 632 | } |
| 633 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 634 | osd_WaitEventWait(info->WaitEvent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 635 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 636 | /* Received a torndown response */ |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 637 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 638 | REMOVE_ENTRY_LIST(&info->MsgListEntry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 639 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 640 | |
Bill Pemberton | 420beac | 2009-07-29 17:00:10 -0400 | [diff] [blame] | 641 | kfree(info->WaitEvent); |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 642 | kfree(info); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 643 | |
| 644 | DPRINT_EXIT(VMBUS); |
| 645 | |
| 646 | return ret; |
| 647 | } |
| 648 | |
| 649 | |
| 650 | /*++ |
| 651 | |
| 652 | Name: |
| 653 | VmbusChannelClose() |
| 654 | |
| 655 | Description: |
| 656 | Close the specified channel |
| 657 | |
| 658 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 659 | void VmbusChannelClose(struct vmbus_channel *Channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 660 | { |
| 661 | int ret=0; |
| 662 | VMBUS_CHANNEL_CLOSE_CHANNEL* msg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 663 | struct vmbus_channel_msginfo *info; |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 664 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 665 | |
| 666 | DPRINT_ENTER(VMBUS); |
| 667 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 668 | /* Stop callback and cancel the timer asap */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 669 | Channel->OnChannelCallback = NULL; |
Greg Kroah-Hartman | c8a429a | 2009-07-29 15:40:57 -0700 | [diff] [blame] | 670 | del_timer(&Channel->poll_timer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 671 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 672 | /* Send a closing message */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 673 | info = kmalloc(sizeof(*info) + sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL), GFP_KERNEL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 674 | ASSERT(info != NULL); |
| 675 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 676 | /* info->waitEvent = osd_WaitEventCreate(); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 677 | |
| 678 | msg = (VMBUS_CHANNEL_CLOSE_CHANNEL*)info->Msg; |
| 679 | msg->Header.MessageType = ChannelMessageCloseChannel; |
| 680 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
| 681 | |
| 682 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); |
| 683 | if (ret != 0) |
| 684 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 685 | /* TODO: */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 686 | } |
| 687 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 688 | /* Tear down the gpadl for the channel's ring buffer */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 689 | if (Channel->RingBufferGpadlHandle) |
| 690 | { |
| 691 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); |
| 692 | } |
| 693 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 694 | /* TODO: Send a msg to release the childRelId */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 695 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 696 | /* Cleanup the ring buffers for this channel */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 697 | RingBufferCleanup(&Channel->Outbound); |
| 698 | RingBufferCleanup(&Channel->Inbound); |
| 699 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 700 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 701 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 702 | kfree(info); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 703 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 704 | |
| 705 | /* |
| 706 | * If we are closing the channel during an error path in |
| 707 | * opening the channel, don't free the channel since the |
| 708 | * caller will free the channel |
| 709 | */ |
| 710 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 711 | if (Channel->State == CHANNEL_OPEN_STATE) |
| 712 | { |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 713 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 714 | REMOVE_ENTRY_LIST(&Channel->ListEntry); |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 715 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 716 | |
| 717 | FreeVmbusChannel(Channel); |
| 718 | } |
| 719 | |
| 720 | DPRINT_EXIT(VMBUS); |
| 721 | } |
| 722 | |
| 723 | |
| 724 | /*++ |
| 725 | |
| 726 | Name: |
| 727 | VmbusChannelSendPacket() |
| 728 | |
| 729 | Description: |
| 730 | Send the specified buffer on the given channel |
| 731 | |
| 732 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 733 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, |
Greg Kroah-Hartman | 8282c40 | 2009-07-14 15:06:28 -0700 | [diff] [blame] | 734 | const void * Buffer, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 735 | u32 BufferLen, |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 736 | u64 RequestId, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 737 | VMBUS_PACKET_TYPE Type, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 738 | u32 Flags |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 739 | ) |
| 740 | { |
| 741 | int ret=0; |
| 742 | VMPACKET_DESCRIPTOR desc; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 743 | u32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 744 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
Nicolas Palix | b219b3f | 2009-07-30 17:37:23 +0200 | [diff] [blame] | 745 | struct scatterlist bufferList[3]; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 746 | u64 alignedData=0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 747 | |
| 748 | DPRINT_ENTER(VMBUS); |
| 749 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); |
| 750 | |
| 751 | DumpVmbusChannel(Channel); |
| 752 | |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 753 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 754 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 755 | /* Setup the descriptor */ |
| 756 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ |
| 757 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ |
| 758 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; /* in 8-bytes granularity */ |
| 759 | desc.Length8 = (u16)(packetLenAligned >> 3); |
| 760 | desc.TransactionId = RequestId; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 761 | |
Nicolas Palix | b219b3f | 2009-07-30 17:37:23 +0200 | [diff] [blame] | 762 | sg_init_table(bufferList,3); |
| 763 | sg_set_buf(&bufferList[0], &desc, sizeof(VMPACKET_DESCRIPTOR)); |
| 764 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
| 765 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 766 | |
| 767 | ret = RingBufferWrite( |
| 768 | &Channel->Outbound, |
| 769 | bufferList, |
| 770 | 3); |
| 771 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 772 | /* TODO: We should determine if this is optional */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 773 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
| 774 | { |
| 775 | VmbusChannelSetEvent(Channel); |
| 776 | } |
| 777 | |
| 778 | DPRINT_EXIT(VMBUS); |
| 779 | |
| 780 | return ret; |
| 781 | } |
| 782 | |
| 783 | |
| 784 | /*++ |
| 785 | |
| 786 | Name: |
| 787 | VmbusChannelSendPacketPageBuffer() |
| 788 | |
| 789 | Description: |
| 790 | Send a range of single-page buffer packets using a GPADL Direct packet type. |
| 791 | |
| 792 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 793 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame^] | 794 | struct hv_page_buffer PageBuffers[], |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 795 | u32 PageCount, |
Greg Kroah-Hartman | 8282c40 | 2009-07-14 15:06:28 -0700 | [diff] [blame] | 796 | void * Buffer, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 797 | u32 BufferLen, |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 798 | u64 RequestId |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 799 | ) |
| 800 | { |
| 801 | int ret=0; |
| 802 | int i=0; |
Bill Pemberton | 0cf4fa8 | 2009-07-27 16:47:39 -0400 | [diff] [blame] | 803 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 804 | u32 descSize; |
| 805 | u32 packetLen; |
| 806 | u32 packetLenAligned; |
Nicolas Palix | b219b3f | 2009-07-30 17:37:23 +0200 | [diff] [blame] | 807 | struct scatterlist bufferList[3]; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 808 | u64 alignedData=0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 809 | |
| 810 | DPRINT_ENTER(VMBUS); |
| 811 | |
| 812 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); |
| 813 | |
| 814 | DumpVmbusChannel(Channel); |
| 815 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 816 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support */ |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame^] | 817 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(struct hv_page_buffer)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 818 | packetLen = descSize + BufferLen; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 819 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 820 | |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 821 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 822 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 823 | /* Setup the descriptor */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 824 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
| 825 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 826 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
| 827 | desc.Length8 = (u16)(packetLenAligned >> 3); |
| 828 | desc.TransactionId = RequestId; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 829 | desc.RangeCount = PageCount; |
| 830 | |
| 831 | for (i=0; i<PageCount; i++) |
| 832 | { |
| 833 | desc.Range[i].Length = PageBuffers[i].Length; |
| 834 | desc.Range[i].Offset = PageBuffers[i].Offset; |
| 835 | desc.Range[i].Pfn = PageBuffers[i].Pfn; |
| 836 | } |
| 837 | |
Nicolas Palix | b219b3f | 2009-07-30 17:37:23 +0200 | [diff] [blame] | 838 | sg_init_table(bufferList,3); |
| 839 | sg_set_buf(&bufferList[0], &desc, descSize); |
| 840 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
| 841 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 842 | |
| 843 | ret = RingBufferWrite( |
| 844 | &Channel->Outbound, |
| 845 | bufferList, |
| 846 | 3); |
| 847 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 848 | /* TODO: We should determine if this is optional */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 849 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
| 850 | { |
| 851 | VmbusChannelSetEvent(Channel); |
| 852 | } |
| 853 | |
| 854 | DPRINT_EXIT(VMBUS); |
| 855 | |
| 856 | return ret; |
| 857 | } |
| 858 | |
| 859 | |
| 860 | |
| 861 | /*++ |
| 862 | |
| 863 | Name: |
| 864 | VmbusChannelSendPacketMultiPageBuffer() |
| 865 | |
| 866 | Description: |
| 867 | Send a multi-page buffer packet using a GPADL Direct packet type. |
| 868 | |
| 869 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 870 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame^] | 871 | struct hv_multipage_buffer *MultiPageBuffer, |
Greg Kroah-Hartman | 8282c40 | 2009-07-14 15:06:28 -0700 | [diff] [blame] | 872 | void * Buffer, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 873 | u32 BufferLen, |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 874 | u64 RequestId |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 875 | ) |
| 876 | { |
| 877 | int ret=0; |
Bill Pemberton | 3fcc523 | 2009-07-27 16:47:40 -0400 | [diff] [blame] | 878 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 879 | u32 descSize; |
| 880 | u32 packetLen; |
| 881 | u32 packetLenAligned; |
Nicolas Palix | b219b3f | 2009-07-30 17:37:23 +0200 | [diff] [blame] | 882 | struct scatterlist bufferList[3]; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 883 | u64 alignedData=0; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 884 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 885 | |
| 886 | DPRINT_ENTER(VMBUS); |
| 887 | |
| 888 | DumpVmbusChannel(Channel); |
| 889 | |
| 890 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); |
| 891 | |
| 892 | ASSERT(PfnCount > 0); |
| 893 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); |
| 894 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 895 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support */ |
Bill Pemberton | 3fcc523 | 2009-07-27 16:47:40 -0400 | [diff] [blame] | 896 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 897 | packetLen = descSize + BufferLen; |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 898 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 899 | |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 900 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 901 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 902 | /* Setup the descriptor */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 903 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
| 904 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 905 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
| 906 | desc.Length8 = (u16)(packetLenAligned >> 3); |
| 907 | desc.TransactionId = RequestId; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 908 | desc.RangeCount = 1; |
| 909 | |
| 910 | desc.Range.Length = MultiPageBuffer->Length; |
| 911 | desc.Range.Offset = MultiPageBuffer->Offset; |
| 912 | |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 913 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 914 | |
Nicolas Palix | b219b3f | 2009-07-30 17:37:23 +0200 | [diff] [blame] | 915 | sg_init_table(bufferList,3); |
| 916 | sg_set_buf(&bufferList[0], &desc, descSize); |
| 917 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
| 918 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 919 | |
| 920 | ret = RingBufferWrite( |
| 921 | &Channel->Outbound, |
| 922 | bufferList, |
| 923 | 3); |
| 924 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 925 | /* TODO: We should determine if this is optional */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 926 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
| 927 | { |
| 928 | VmbusChannelSetEvent(Channel); |
| 929 | } |
| 930 | |
| 931 | DPRINT_EXIT(VMBUS); |
| 932 | |
| 933 | return ret; |
| 934 | } |
| 935 | |
| 936 | |
| 937 | /*++ |
| 938 | |
| 939 | Name: |
| 940 | VmbusChannelRecvPacket() |
| 941 | |
| 942 | Description: |
| 943 | Retrieve the user packet on the specified channel |
| 944 | |
| 945 | --*/ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 946 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 947 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, |
Greg Kroah-Hartman | 46a0525 | 2009-08-17 17:21:31 -0700 | [diff] [blame] | 948 | void *Buffer, |
| 949 | u32 BufferLen, |
| 950 | u32 *BufferActualLen, |
| 951 | u64 *RequestId) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 952 | { |
| 953 | VMPACKET_DESCRIPTOR desc; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 954 | u32 packetLen; |
| 955 | u32 userLen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 956 | int ret; |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 957 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 958 | |
| 959 | DPRINT_ENTER(VMBUS); |
| 960 | |
| 961 | *BufferActualLen = 0; |
| 962 | *RequestId = 0; |
| 963 | |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 964 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 965 | |
| 966 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); |
| 967 | if (ret != 0) |
| 968 | { |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 969 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 970 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 971 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 972 | DPRINT_EXIT(VMBUS); |
| 973 | return 0; |
| 974 | } |
| 975 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 976 | /* VmbusChannelClearEvent(Channel); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 977 | |
| 978 | packetLen = desc.Length8 << 3; |
| 979 | userLen = packetLen - (desc.DataOffset8 << 3); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 980 | /* ASSERT(userLen > 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 981 | |
| 982 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", |
| 983 | Channel, |
| 984 | Channel->OfferMsg.ChildRelId, |
| 985 | desc.Type, |
| 986 | desc.Flags, |
| 987 | desc.TransactionId, packetLen, userLen); |
| 988 | |
| 989 | *BufferActualLen = userLen; |
| 990 | |
| 991 | if (userLen > BufferLen) |
| 992 | { |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 993 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 994 | |
| 995 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); |
| 996 | DPRINT_EXIT(VMBUS); |
| 997 | |
| 998 | return -1; |
| 999 | } |
| 1000 | |
| 1001 | *RequestId = desc.TransactionId; |
| 1002 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1003 | /* Copy over the packet to the user buffer */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1004 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); |
| 1005 | |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 1006 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1007 | |
| 1008 | DPRINT_EXIT(VMBUS); |
| 1009 | |
| 1010 | return 0; |
| 1011 | } |
| 1012 | |
| 1013 | /*++ |
| 1014 | |
| 1015 | Name: |
| 1016 | VmbusChannelRecvPacketRaw() |
| 1017 | |
| 1018 | Description: |
| 1019 | Retrieve the raw packet on the specified channel |
| 1020 | |
| 1021 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 1022 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, |
Greg Kroah-Hartman | 8282c40 | 2009-07-14 15:06:28 -0700 | [diff] [blame] | 1023 | void * Buffer, |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 1024 | u32 BufferLen, |
| 1025 | u32* BufferActualLen, |
Greg Kroah-Hartman | 5947143 | 2009-07-14 15:10:26 -0700 | [diff] [blame] | 1026 | u64* RequestId |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1027 | ) |
| 1028 | { |
| 1029 | VMPACKET_DESCRIPTOR desc; |
Greg Kroah-Hartman | 4d64311 | 2009-07-14 15:09:36 -0700 | [diff] [blame] | 1030 | u32 packetLen; |
| 1031 | u32 userLen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1032 | int ret; |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 1033 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1034 | |
| 1035 | DPRINT_ENTER(VMBUS); |
| 1036 | |
| 1037 | *BufferActualLen = 0; |
| 1038 | *RequestId = 0; |
| 1039 | |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 1040 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1041 | |
| 1042 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); |
| 1043 | if (ret != 0) |
| 1044 | { |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 1045 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1046 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1047 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1048 | DPRINT_EXIT(VMBUS); |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1052 | /* VmbusChannelClearEvent(Channel); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1053 | |
| 1054 | packetLen = desc.Length8 << 3; |
| 1055 | userLen = packetLen - (desc.DataOffset8 << 3); |
| 1056 | |
| 1057 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", |
| 1058 | Channel, |
| 1059 | Channel->OfferMsg.ChildRelId, |
| 1060 | desc.Type, |
| 1061 | desc.Flags, |
| 1062 | desc.TransactionId, packetLen, userLen); |
| 1063 | |
| 1064 | *BufferActualLen = packetLen; |
| 1065 | |
| 1066 | if (packetLen > BufferLen) |
| 1067 | { |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 1068 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1069 | |
| 1070 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but got space for only %d bytes", packetLen, BufferLen); |
| 1071 | DPRINT_EXIT(VMBUS); |
| 1072 | return -2; |
| 1073 | } |
| 1074 | |
| 1075 | *RequestId = desc.TransactionId; |
| 1076 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1077 | /* Copy over the entire packet to the user buffer */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1078 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
| 1079 | |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 1080 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1081 | |
| 1082 | DPRINT_EXIT(VMBUS); |
| 1083 | |
| 1084 | return 0; |
| 1085 | } |
| 1086 | |
| 1087 | |
| 1088 | /*++ |
| 1089 | |
| 1090 | Name: |
| 1091 | VmbusChannelOnChannelEvent() |
| 1092 | |
| 1093 | Description: |
| 1094 | Channel event callback |
| 1095 | |
| 1096 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 1097 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1098 | { |
| 1099 | DumpVmbusChannel(Channel); |
| 1100 | ASSERT(Channel->OnChannelCallback); |
| 1101 | #ifdef ENABLE_POLLING |
Greg Kroah-Hartman | c8a429a | 2009-07-29 15:40:57 -0700 | [diff] [blame] | 1102 | del_timer(&Channel->poll_timer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1103 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
Greg Kroah-Hartman | c8a429a | 2009-07-29 15:40:57 -0700 | [diff] [blame] | 1104 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
| 1105 | add_timer(&channel->poll_timer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1106 | #else |
| 1107 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
| 1108 | #endif |
| 1109 | } |
| 1110 | |
| 1111 | /*++ |
| 1112 | |
| 1113 | Name: |
| 1114 | VmbusChannelOnTimer() |
| 1115 | |
| 1116 | Description: |
| 1117 | Timer event callback |
| 1118 | |
| 1119 | --*/ |
Greg Kroah-Hartman | 46a0525 | 2009-08-17 17:21:31 -0700 | [diff] [blame] | 1120 | void VmbusChannelOnTimer(unsigned long data) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1121 | { |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 1122 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1123 | |
| 1124 | if (channel->OnChannelCallback) |
| 1125 | { |
| 1126 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
| 1127 | #ifdef ENABLE_POLLING |
Greg Kroah-Hartman | c8a429a | 2009-07-29 15:40:57 -0700 | [diff] [blame] | 1128 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
| 1129 | add_timer(&channel->poll_timer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1130 | #endif |
| 1131 | } |
| 1132 | } |
| 1133 | |
| 1134 | |
| 1135 | /*++ |
| 1136 | |
| 1137 | Name: |
| 1138 | DumpVmbusChannel() |
| 1139 | |
| 1140 | Description: |
| 1141 | Dump vmbus channel info to the console |
| 1142 | |
| 1143 | --*/ |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 1144 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1145 | { |
| 1146 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); |
| 1147 | DumpRingInfo(&Channel->Outbound, "Outbound "); |
| 1148 | DumpRingInfo(&Channel->Inbound, "Inbound "); |
| 1149 | } |
| 1150 | |
| 1151 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1152 | /* eof */ |