+++ /dev/null
-/*
- * Copyright (c) 2009, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include "osd.h"
-#include "logging.h"
-#include "VmbusPrivate.h"
-
-/* Internal routines */
-static int VmbusChannelCreateGpadlHeader(
- void *Kbuffer, /* must be phys and virt contiguous */
- u32 Size, /* page-size multiple */
- struct vmbus_channel_msginfo **msgInfo,
- u32 *MessageCount);
-static void DumpVmbusChannel(struct vmbus_channel *channel);
-static void VmbusChannelSetEvent(struct vmbus_channel *channel);
-
-
-#if 0
-static void DumpMonitorPage(struct hv_monitor_page *MonitorPage)
-{
- int i = 0;
- int j = 0;
-
- DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d",
- MonitorPage, MonitorPage->TriggerState);
-
- for (i = 0; i < 4; i++)
- DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i,
- MonitorPage->TriggerGroup[i].AsUINT64);
-
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 32; j++) {
- DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j,
- MonitorPage->Latency[i][j]);
- }
- }
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 32; j++) {
- DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j,
- MonitorPage->Parameter[i][j].ConnectionId.Asu32);
- DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j,
- MonitorPage->Parameter[i][j].FlagNumber);
- }
- }
-}
-#endif
-
-/*
- * VmbusChannelSetEvent - Trigger an event notification on the specified
- * channel.
- */
-static void VmbusChannelSetEvent(struct vmbus_channel *Channel)
-{
- struct hv_monitor_page *monitorPage;
-
- DPRINT_ENTER(VMBUS);
-
- if (Channel->OfferMsg.MonitorAllocated) {
- /* Each u32 represents 32 channels */
- set_bit(Channel->OfferMsg.ChildRelId & 31,
- (unsigned long *) gVmbusConnection.SendInterruptPage +
- (Channel->OfferMsg.ChildRelId >> 5));
-
- monitorPage = gVmbusConnection.MonitorPages;
- monitorPage++; /* Get the child to parent monitor page */
-
- set_bit(Channel->MonitorBit,
- (unsigned long *)&monitorPage->TriggerGroup
- [Channel->MonitorGroup].Pending);
-
- } else {
- VmbusSetEvent(Channel->OfferMsg.ChildRelId);
- }
-
- DPRINT_EXIT(VMBUS);
-}
-
-#if 0
-static void VmbusChannelClearEvent(struct vmbus_channel *channel)
-{
- struct hv_monitor_page *monitorPage;
-
- DPRINT_ENTER(VMBUS);
-
- if (Channel->OfferMsg.MonitorAllocated) {
- /* Each u32 represents 32 channels */
- clear_bit(Channel->OfferMsg.ChildRelId & 31,
- (unsigned long *)gVmbusConnection.SendInterruptPage +
- (Channel->OfferMsg.ChildRelId >> 5));
-
- monitorPage =
- (struct hv_monitor_page *)gVmbusConnection.MonitorPages;
- monitorPage++; /* Get the child to parent monitor page */
-
- clear_bit(Channel->MonitorBit,
- (unsigned long *)&monitorPage->TriggerGroup
- [Channel->MonitorGroup].Pending);
- }
-
- DPRINT_EXIT(VMBUS);
-}
-
-#endif
-/*
- * VmbusChannelGetDebugInfo -Retrieve various channel debug info
- */
-void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel,
- struct vmbus_channel_debug_info *DebugInfo)
-{
- struct hv_monitor_page *monitorPage;
- u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32;
- u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32;
- /* u32 monitorBit = 1 << monitorOffset; */
-
- DebugInfo->RelId = Channel->OfferMsg.ChildRelId;
- DebugInfo->State = Channel->State;
- memcpy(&DebugInfo->InterfaceType,
- &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid));
- memcpy(&DebugInfo->InterfaceInstance,
- &Channel->OfferMsg.Offer.InterfaceInstance,
- sizeof(struct hv_guid));
-
- monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages;
-
- DebugInfo->MonitorId = Channel->OfferMsg.MonitorId;
-
- DebugInfo->ServerMonitorPending =
- monitorPage->TriggerGroup[monitorGroup].Pending;
- DebugInfo->ServerMonitorLatency =
- monitorPage->Latency[monitorGroup][monitorOffset];
- DebugInfo->ServerMonitorConnectionId =
- monitorPage->Parameter[monitorGroup]
- [monitorOffset].ConnectionId.u.Id;
-
- monitorPage++;
-
- DebugInfo->ClientMonitorPending =
- monitorPage->TriggerGroup[monitorGroup].Pending;
- DebugInfo->ClientMonitorLatency =
- monitorPage->Latency[monitorGroup][monitorOffset];
- DebugInfo->ClientMonitorConnectionId =
- monitorPage->Parameter[monitorGroup]
- [monitorOffset].ConnectionId.u.Id;
-
- RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound);
- RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound);
-}
-
-/*
- * VmbusChannelOpen - Open the specified channel.
- */
-int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize,
- u32 RecvRingBufferSize, void *UserData, u32 UserDataLen,
- void (*OnChannelCallback)(void *context), void *Context)
-{
- struct vmbus_channel_open_channel *openMsg;
- struct vmbus_channel_msginfo *openInfo = NULL;
- void *in, *out;
- unsigned long flags;
- int ret, err = 0;
-
- DPRINT_ENTER(VMBUS);
-
- /* Aligned to page size */
- /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */
- /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */
-
- NewChannel->OnChannelCallback = OnChannelCallback;
- NewChannel->ChannelCallbackContext = Context;
-
- /* Allocate the ring buffer */
- out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize)
- >> PAGE_SHIFT);
- if (!out)
- return -ENOMEM;
-
- /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */
-
- in = (void *)((unsigned long)out + SendRingBufferSize);
-
- NewChannel->RingBufferPages = out;
- NewChannel->RingBufferPageCount = (SendRingBufferSize +
- RecvRingBufferSize) >> PAGE_SHIFT;
-
- ret = RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize);
- if (!ret) {
- err = ret;
- goto errorout;
- }
-
- ret = RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize);
- if (!ret) {
- err = ret;
- goto errorout;
- }
-
-
- /* Establish the gpadl for the ring buffer */
- DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...",
- NewChannel);
-
- NewChannel->RingBufferGpadlHandle = 0;
-
- ret = VmbusChannelEstablishGpadl(NewChannel,
- NewChannel->Outbound.RingBuffer,
- SendRingBufferSize +
- RecvRingBufferSize,
- &NewChannel->RingBufferGpadlHandle);
-
- if (!ret) {
- err = ret;
- goto errorout;
- }
-
- DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p "
- "size %d recv ring %p size %d, downstreamoffset %d>",
- NewChannel, NewChannel->OfferMsg.ChildRelId,
- NewChannel->RingBufferGpadlHandle,
- NewChannel->Outbound.RingBuffer,
- NewChannel->Outbound.RingSize,
- NewChannel->Inbound.RingBuffer,
- NewChannel->Inbound.RingSize,
- SendRingBufferSize);
-
- /* Create and init the channel open message */
- openInfo = kmalloc(sizeof(*openInfo) +
- sizeof(struct vmbus_channel_open_channel),
- GFP_KERNEL);
- if (!openInfo) {
- err = -ENOMEM;
- goto errorout;
- }
-
- openInfo->WaitEvent = osd_WaitEventCreate();
- if (!openInfo->WaitEvent) {
- err = -ENOMEM;
- goto errorout;
- }
-
- openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg;
- openMsg->Header.MessageType = ChannelMessageOpenChannel;
- openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */
- openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId;
- openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle;
- openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >>
- PAGE_SHIFT;
- openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */
-
- if (UserDataLen > MAX_USER_DEFINED_BYTES) {
- err = -EINVAL;
- goto errorout;
- }
-
- if (UserDataLen)
- memcpy(openMsg->UserData, UserData, UserDataLen);
-
- spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- list_add_tail(&openInfo->MsgListEntry,
- &gVmbusConnection.ChannelMsgList);
- spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
- DPRINT_DBG(VMBUS, "Sending channel open msg...");
-
- ret = VmbusPostMessage(openMsg,
- sizeof(struct vmbus_channel_open_channel));
- if (ret != 0) {
- DPRINT_ERR(VMBUS, "unable to open channel - %d", ret);
- goto Cleanup;
- }
-
- /* FIXME: Need to time-out here */
- osd_WaitEventWait(openInfo->WaitEvent);
-
- if (openInfo->Response.OpenResult.Status == 0)
- DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel);
- else
- DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!",
- NewChannel, openInfo->Response.OpenResult.Status);
-
-Cleanup:
- spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- list_del(&openInfo->MsgListEntry);
- spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
- kfree(openInfo->WaitEvent);
- kfree(openInfo);
-
- DPRINT_EXIT(VMBUS);
-
- return 0;
-
-errorout:
- RingBufferCleanup(&NewChannel->Outbound);
- RingBufferCleanup(&NewChannel->Inbound);
- osd_PageFree(out, (SendRingBufferSize + RecvRingBufferSize)
- >> PAGE_SHIFT);
- kfree(openInfo);
- return err;
-}
-
-/*
- * DumpGpadlBody - Dump the gpadl body message to the console for
- * debugging purposes.
- */
-static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len)
-{
- int i;
- int pfnCount;
-
- pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) /
- sizeof(u64);
- DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount);
-
- for (i = 0; i < pfnCount; i++)
- DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu",
- i, Gpadl->Pfn[i]);
-}
-
-/*
- * DumpGpadlHeader - Dump the gpadl header message to the console for
- * debugging purposes.
- */
-static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl)
-{
- int i, j;
- int pageCount;
-
- DPRINT_DBG(VMBUS,
- "gpadl header - relid %d, range count %d, range buflen %d",
- Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen);
- for (i = 0; i < Gpadl->RangeCount; i++) {
- pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT;
- pageCount = (pageCount > 26) ? 26 : pageCount;
-
- DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d "
- "page count %d", i, Gpadl->Range[i].ByteCount,
- Gpadl->Range[i].ByteOffset, pageCount);
-
- for (j = 0; j < pageCount; j++)
- DPRINT_DBG(VMBUS, "%d) pfn %llu", j,
- Gpadl->Range[i].PfnArray[j]);
- }
-}
-
-/*
- * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer
- */
-static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size,
- struct vmbus_channel_msginfo **MsgInfo,
- u32 *MessageCount)
-{
- int i;
- int pageCount;
- unsigned long long pfn;
- struct vmbus_channel_gpadl_header *gpaHeader;
- struct vmbus_channel_gpadl_body *gpadlBody;
- struct vmbus_channel_msginfo *msgHeader;
- struct vmbus_channel_msginfo *msgBody = NULL;
- u32 msgSize;
-
- int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize;
-
- /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */
- /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */
-
- pageCount = Size >> PAGE_SHIFT;
- pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT;
-
- /* do we need a gpadl body msg */
- pfnSize = MAX_SIZE_CHANNEL_MESSAGE -
- sizeof(struct vmbus_channel_gpadl_header) -
- sizeof(struct gpa_range);
- pfnCount = pfnSize / sizeof(u64);
-
- if (pageCount > pfnCount) {
- /* we need a gpadl body */
- /* fill in the header */
- msgSize = sizeof(struct vmbus_channel_msginfo) +
- sizeof(struct vmbus_channel_gpadl_header) +
- sizeof(struct gpa_range) + pfnCount * sizeof(u64);
- msgHeader = kzalloc(msgSize, GFP_KERNEL);
- if (!msgHeader)
- goto nomem;
-
- INIT_LIST_HEAD(&msgHeader->SubMsgList);
- msgHeader->MessageSize = msgSize;
-
- gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg;
- gpaHeader->RangeCount = 1;
- gpaHeader->RangeBufLen = sizeof(struct gpa_range) +
- pageCount * sizeof(u64);
- gpaHeader->Range[0].ByteOffset = 0;
- gpaHeader->Range[0].ByteCount = Size;
- for (i = 0; i < pfnCount; i++)
- gpaHeader->Range[0].PfnArray[i] = pfn+i;
- *MsgInfo = msgHeader;
- *MessageCount = 1;
-
- pfnSum = pfnCount;
- pfnLeft = pageCount - pfnCount;
-
- /* how many pfns can we fit */
- pfnSize = MAX_SIZE_CHANNEL_MESSAGE -
- sizeof(struct vmbus_channel_gpadl_body);
- pfnCount = pfnSize / sizeof(u64);
-
- /* fill in the body */
- while (pfnLeft) {
- if (pfnLeft > pfnCount)
- pfnCurr = pfnCount;
- else
- pfnCurr = pfnLeft;
-
- msgSize = sizeof(struct vmbus_channel_msginfo) +
- sizeof(struct vmbus_channel_gpadl_body) +
- pfnCurr * sizeof(u64);
- msgBody = kzalloc(msgSize, GFP_KERNEL);
- /* FIXME: we probably need to more if this fails */
- if (!msgBody)
- goto nomem;
- msgBody->MessageSize = msgSize;
- (*MessageCount)++;
- gpadlBody =
- (struct vmbus_channel_gpadl_body *)msgBody->Msg;
-
- /*
- * FIXME:
- * Gpadl is u32 and we are using a pointer which could
- * be 64-bit
- */
- /* gpadlBody->Gpadl = kbuffer; */
- for (i = 0; i < pfnCurr; i++)
- gpadlBody->Pfn[i] = pfn + pfnSum + i;
-
- /* add to msg header */
- list_add_tail(&msgBody->MsgListEntry,
- &msgHeader->SubMsgList);
- pfnSum += pfnCurr;
- pfnLeft -= pfnCurr;
- }
- } else {
- /* everything fits in a header */
- msgSize = sizeof(struct vmbus_channel_msginfo) +
- sizeof(struct vmbus_channel_gpadl_header) +
- sizeof(struct gpa_range) + pageCount * sizeof(u64);
- msgHeader = kzalloc(msgSize, GFP_KERNEL);
- msgHeader->MessageSize = msgSize;
-
- gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg;
- gpaHeader->RangeCount = 1;
- gpaHeader->RangeBufLen = sizeof(struct gpa_range) +
- pageCount * sizeof(u64);
- gpaHeader->Range[0].ByteOffset = 0;
- gpaHeader->Range[0].ByteCount = Size;
- for (i = 0; i < pageCount; i++)
- gpaHeader->Range[0].PfnArray[i] = pfn+i;
-
- *MsgInfo = msgHeader;
- *MessageCount = 1;
- }
-
- return 0;
-nomem:
- kfree(msgHeader);
- kfree(msgBody);
- return -ENOMEM;
-}
-
-/*
- * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer
- *
- * @Channel: a channel
- * @Kbuffer: from kmalloc
- * @Size: page-size multiple
- * @GpadlHandle: some funky thing
- */
-int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer,
- u32 Size, u32 *GpadlHandle)
-{
- struct vmbus_channel_gpadl_header *gpadlMsg;
- struct vmbus_channel_gpadl_body *gpadlBody;
- /* struct vmbus_channel_gpadl_created *gpadlCreated; */
- struct vmbus_channel_msginfo *msgInfo = NULL;
- struct vmbus_channel_msginfo *subMsgInfo;
- u32 msgCount;
- struct list_head *curr;
- u32 nextGpadlHandle;
- unsigned long flags;
- int ret = 0;
-
- DPRINT_ENTER(VMBUS);
-
- nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle);
- atomic_inc(&gVmbusConnection.NextGpadlHandle);
-
- ret = VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount);
- if (ret)
- return ret;
-
- msgInfo->WaitEvent = osd_WaitEventCreate();
- if (!msgInfo->WaitEvent) {
- ret = -ENOMEM;
- goto Cleanup;
- }
-
- gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg;
- gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader;
- gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId;
- gpadlMsg->Gpadl = nextGpadlHandle;
-
- DumpGpadlHeader(gpadlMsg);
-
- spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- list_add_tail(&msgInfo->MsgListEntry,
- &gVmbusConnection.ChannelMsgList);
-
- spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
- DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d",
- Kbuffer, Size, msgCount);
-
- DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd",
- msgInfo->MessageSize - sizeof(*msgInfo));
-
- ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize -
- sizeof(*msgInfo));
- if (ret != 0) {
- DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret);
- goto Cleanup;
- }
-
- if (msgCount > 1) {
- list_for_each(curr, &msgInfo->SubMsgList) {
-
- /* FIXME: should this use list_entry() instead ? */
- subMsgInfo = (struct vmbus_channel_msginfo *)curr;
- gpadlBody =
- (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg;
-
- gpadlBody->Header.MessageType = ChannelMessageGpadlBody;
- gpadlBody->Gpadl = nextGpadlHandle;
-
- DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd",
- subMsgInfo->MessageSize -
- sizeof(*subMsgInfo));
-
- DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize -
- sizeof(*subMsgInfo));
- ret = VmbusPostMessage(gpadlBody,
- subMsgInfo->MessageSize -
- sizeof(*subMsgInfo));
- if (!ret)
- goto Cleanup;
-
- }
- }
- osd_WaitEventWait(msgInfo->WaitEvent);
-
- /* At this point, we received the gpadl created msg */
- DPRINT_DBG(VMBUS, "Received GPADL created "
- "(relid %d, status %d handle %x)",
- Channel->OfferMsg.ChildRelId,
- msgInfo->Response.GpadlCreated.CreationStatus,
- gpadlMsg->Gpadl);
-
- *GpadlHandle = gpadlMsg->Gpadl;
-
-Cleanup:
- spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- list_del(&msgInfo->MsgListEntry);
- spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
- kfree(msgInfo->WaitEvent);
- kfree(msgInfo);
-
- DPRINT_EXIT(VMBUS);
-
- return ret;
-}
-
-/*
- * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle
- */
-int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle)
-{
- struct vmbus_channel_gpadl_teardown *msg;
- struct vmbus_channel_msginfo *info;
- unsigned long flags;
- int ret;
-
- DPRINT_ENTER(VMBUS);
-
- /* ASSERT(GpadlHandle != 0); */
-
- info = kmalloc(sizeof(*info) +
- sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- info->WaitEvent = osd_WaitEventCreate();
- if (!info->WaitEvent) {
- kfree(info);
- return -ENOMEM;
- }
-
- msg = (struct vmbus_channel_gpadl_teardown *)info->Msg;
-
- msg->Header.MessageType = ChannelMessageGpadlTeardown;
- msg->ChildRelId = Channel->OfferMsg.ChildRelId;
- msg->Gpadl = GpadlHandle;
-
- spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- list_add_tail(&info->MsgListEntry,
- &gVmbusConnection.ChannelMsgList);
- spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
- ret = VmbusPostMessage(msg,
- sizeof(struct vmbus_channel_gpadl_teardown));
- if (ret != 0) {
- /* TODO: */
- /* something... */
- }
-
- osd_WaitEventWait(info->WaitEvent);
-
- /* Received a torndown response */
- spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
- list_del(&info->MsgListEntry);
- spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
-
- kfree(info->WaitEvent);
- kfree(info);
-
- DPRINT_EXIT(VMBUS);
-
- return ret;
-}
-
-/*
- * VmbusChannelClose - Close the specified channel
- */
-void VmbusChannelClose(struct vmbus_channel *Channel)
-{
- struct vmbus_channel_close_channel *msg;
- struct vmbus_channel_msginfo *info;
- unsigned long flags;
- int ret;
-
- DPRINT_ENTER(VMBUS);
-
- /* Stop callback and cancel the timer asap */
- Channel->OnChannelCallback = NULL;
- del_timer_sync(&Channel->poll_timer);
-
- /* Send a closing message */
- info = kmalloc(sizeof(*info) +
- sizeof(struct vmbus_channel_close_channel), GFP_KERNEL);
- /* FIXME: can't do anything other than return here because the
- * function is void */
- if (!info)
- return;
-
- /* info->waitEvent = osd_WaitEventCreate(); */
-
- msg = (struct vmbus_channel_close_channel *)info->Msg;
- msg->Header.MessageType = ChannelMessageCloseChannel;
- msg->ChildRelId = Channel->OfferMsg.ChildRelId;
-
- ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel));
- if (ret != 0) {
- /* TODO: */
- /* something... */
- }
-
- /* Tear down the gpadl for the channel's ring buffer */
- if (Channel->RingBufferGpadlHandle)
- VmbusChannelTeardownGpadl(Channel,
- Channel->RingBufferGpadlHandle);
-
- /* TODO: Send a msg to release the childRelId */
-
- /* Cleanup the ring buffers for this channel */
- RingBufferCleanup(&Channel->Outbound);
- RingBufferCleanup(&Channel->Inbound);
-
- osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount);
-
- kfree(info);
-
- /*
- * If we are closing the channel during an error path in
- * opening the channel, don't free the channel since the
- * caller will free the channel
- */
-
- if (Channel->State == CHANNEL_OPEN_STATE) {
- spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
- list_del(&Channel->ListEntry);
- spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);
-
- FreeVmbusChannel(Channel);
- }
-
- DPRINT_EXIT(VMBUS);
-}
-
-/**
- * VmbusChannelSendPacket() - Send the specified buffer on the given channel
- * @Channel: Pointer to vmbus_channel structure.
- * @Buffer: Pointer to the buffer you want to receive the data into.
- * @BufferLen: Maximum size of what the the buffer will hold
- * @RequestId: Identifier of the request
- * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time
- * packet etc.
- *
- * Sends data in @Buffer directly to hyper-v via the vmbus
- * This will send the data unparsed to hyper-v.
- *
- * Mainly used by Hyper-V drivers.
- */
-int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,
- u32 BufferLen, u64 RequestId,
- enum vmbus_packet_type Type, u32 Flags)
-{
- struct vmpacket_descriptor desc;
- u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen;
- u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
- struct scatterlist bufferList[3];
- u64 alignedData = 0;
- int ret;
-
- DPRINT_ENTER(VMBUS);
- DPRINT_DBG(VMBUS, "channel %p buffer %p len %d",
- Channel, Buffer, BufferLen);
-
- DumpVmbusChannel(Channel);
-
- /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
-
- /* Setup the descriptor */
- desc.Type = Type; /* VmbusPacketTypeDataInBand; */
- desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */
- /* in 8-bytes granularity */
- desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3;
- desc.Length8 = (u16)(packetLenAligned >> 3);
- desc.TransactionId = RequestId;
-
- sg_init_table(bufferList, 3);
- sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor));
- sg_set_buf(&bufferList[1], Buffer, BufferLen);
- sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
-
- ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
-
- /* TODO: We should determine if this is optional */
- if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
- VmbusChannelSetEvent(Channel);
-
- DPRINT_EXIT(VMBUS);
-
- return ret;
-}
-EXPORT_SYMBOL(VmbusChannelSendPacket);
-
-/*
- * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer
- * packets using a GPADL Direct packet type.
- */
-int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel,
- struct hv_page_buffer PageBuffers[],
- u32 PageCount, void *Buffer, u32 BufferLen,
- u64 RequestId)
-{
- int ret;
- int i;
- struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc;
- u32 descSize;
- u32 packetLen;
- u32 packetLenAligned;
- struct scatterlist bufferList[3];
- u64 alignedData = 0;
-
- DPRINT_ENTER(VMBUS);
-
- if (PageCount > MAX_PAGE_BUFFER_COUNT)
- return -EINVAL;
-
- DumpVmbusChannel(Channel);
-
- /*
- * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the
- * largest size we support
- */
- descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) -
- ((MAX_PAGE_BUFFER_COUNT - PageCount) *
- sizeof(struct hv_page_buffer));
- packetLen = descSize + BufferLen;
- packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
-
- /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
-
- /* Setup the descriptor */
- desc.Type = VmbusPacketTypeDataUsingGpaDirect;
- desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
- desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */
- desc.Length8 = (u16)(packetLenAligned >> 3);
- desc.TransactionId = RequestId;
- desc.RangeCount = PageCount;
-
- for (i = 0; i < PageCount; i++) {
- desc.Range[i].Length = PageBuffers[i].Length;
- desc.Range[i].Offset = PageBuffers[i].Offset;
- desc.Range[i].Pfn = PageBuffers[i].Pfn;
- }
-
- sg_init_table(bufferList, 3);
- sg_set_buf(&bufferList[0], &desc, descSize);
- sg_set_buf(&bufferList[1], Buffer, BufferLen);
- sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
-
- ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
-
- /* TODO: We should determine if this is optional */
- if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
- VmbusChannelSetEvent(Channel);
-
- DPRINT_EXIT(VMBUS);
-
- return ret;
-}
-
-/*
- * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet
- * using a GPADL Direct packet type.
- */
-int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel,
- struct hv_multipage_buffer *MultiPageBuffer,
- void *Buffer, u32 BufferLen, u64 RequestId)
-{
- int ret;
- struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc;
- u32 descSize;
- u32 packetLen;
- u32 packetLenAligned;
- struct scatterlist bufferList[3];
- u64 alignedData = 0;
- u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset,
- MultiPageBuffer->Length);
-
- DPRINT_ENTER(VMBUS);
-
- DumpVmbusChannel(Channel);
-
- DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u",
- MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount);
-
- if ((PfnCount < 0) || (PfnCount > MAX_MULTIPAGE_BUFFER_COUNT))
- return -EINVAL;
-
- /*
- * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is
- * the largest size we support
- */
- descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) -
- ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) *
- sizeof(u64));
- packetLen = descSize + BufferLen;
- packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
-
- /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
-
- /* Setup the descriptor */
- desc.Type = VmbusPacketTypeDataUsingGpaDirect;
- desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
- desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */
- desc.Length8 = (u16)(packetLenAligned >> 3);
- desc.TransactionId = RequestId;
- desc.RangeCount = 1;
-
- desc.Range.Length = MultiPageBuffer->Length;
- desc.Range.Offset = MultiPageBuffer->Offset;
-
- memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray,
- PfnCount * sizeof(u64));
-
- sg_init_table(bufferList, 3);
- sg_set_buf(&bufferList[0], &desc, descSize);
- sg_set_buf(&bufferList[1], Buffer, BufferLen);
- sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
-
- ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
-
- /* TODO: We should determine if this is optional */
- if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
- VmbusChannelSetEvent(Channel);
-
- DPRINT_EXIT(VMBUS);
-
- return ret;
-}
-
-
-/**
- * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel
- * @Channel: Pointer to vmbus_channel structure.
- * @Buffer: Pointer to the buffer you want to receive the data into.
- * @BufferLen: Maximum size of what the the buffer will hold
- * @BufferActualLen: The actual size of the data after it was received
- * @RequestId: Identifier of the request
- *
- * Receives directly from the hyper-v vmbus and puts the data it received
- * into Buffer. This will receive the data unparsed from hyper-v.
- *
- * Mainly used by Hyper-V drivers.
- */
-int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,
- u32 BufferLen, u32 *BufferActualLen, u64 *RequestId)
-{
- struct vmpacket_descriptor desc;
- u32 packetLen;
- u32 userLen;
- int ret;
- unsigned long flags;
-
- DPRINT_ENTER(VMBUS);
-
- *BufferActualLen = 0;
- *RequestId = 0;
-
- spin_lock_irqsave(&Channel->inbound_lock, flags);
-
- ret = RingBufferPeek(&Channel->Inbound, &desc,
- sizeof(struct vmpacket_descriptor));
- if (ret != 0) {
- spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
- /* DPRINT_DBG(VMBUS, "nothing to read!!"); */
- DPRINT_EXIT(VMBUS);
- return 0;
- }
-
- /* VmbusChannelClearEvent(Channel); */
-
- packetLen = desc.Length8 << 3;
- userLen = packetLen - (desc.DataOffset8 << 3);
- /* ASSERT(userLen > 0); */
-
- DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d "
- "flag %d tid %llx pktlen %d datalen %d> ",
- Channel, Channel->OfferMsg.ChildRelId, desc.Type,
- desc.Flags, desc.TransactionId, packetLen, userLen);
-
- *BufferActualLen = userLen;
-
- if (userLen > BufferLen) {
- spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
- DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d",
- BufferLen, userLen);
- DPRINT_EXIT(VMBUS);
-
- return -1;
- }
-
- *RequestId = desc.TransactionId;
-
- /* Copy over the packet to the user buffer */
- ret = RingBufferRead(&Channel->Inbound, Buffer, userLen,
- (desc.DataOffset8 << 3));
-
- spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
- DPRINT_EXIT(VMBUS);
-
- return 0;
-}
-EXPORT_SYMBOL(VmbusChannelRecvPacket);
-
-/*
- * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel
- */
-int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer,
- u32 BufferLen, u32 *BufferActualLen,
- u64 *RequestId)
-{
- struct vmpacket_descriptor desc;
- u32 packetLen;
- u32 userLen;
- int ret;
- unsigned long flags;
-
- DPRINT_ENTER(VMBUS);
-
- *BufferActualLen = 0;
- *RequestId = 0;
-
- spin_lock_irqsave(&Channel->inbound_lock, flags);
-
- ret = RingBufferPeek(&Channel->Inbound, &desc,
- sizeof(struct vmpacket_descriptor));
- if (ret != 0) {
- spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
- /* DPRINT_DBG(VMBUS, "nothing to read!!"); */
- DPRINT_EXIT(VMBUS);
- return 0;
- }
-
- /* VmbusChannelClearEvent(Channel); */
-
- packetLen = desc.Length8 << 3;
- userLen = packetLen - (desc.DataOffset8 << 3);
-
- DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d "
- "flag %d tid %llx pktlen %d datalen %d> ",
- Channel, Channel->OfferMsg.ChildRelId, desc.Type,
- desc.Flags, desc.TransactionId, packetLen, userLen);
-
- *BufferActualLen = packetLen;
-
- if (packetLen > BufferLen) {
- spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
- DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but "
- "got space for only %d bytes", packetLen, BufferLen);
- DPRINT_EXIT(VMBUS);
- return -2;
- }
-
- *RequestId = desc.TransactionId;
-
- /* Copy over the entire packet to the user buffer */
- ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0);
-
- spin_unlock_irqrestore(&Channel->inbound_lock, flags);
-
- DPRINT_EXIT(VMBUS);
-
- return 0;
-}
-
-/*
- * VmbusChannelOnChannelEvent - Channel event callback
- */
-void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel)
-{
- DumpVmbusChannel(Channel);
- /* ASSERT(Channel->OnChannelCallback); */
-
- Channel->OnChannelCallback(Channel->ChannelCallbackContext);
-
- mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100));
-}
-
-/*
- * VmbusChannelOnTimer - Timer event callback
- */
-void VmbusChannelOnTimer(unsigned long data)
-{
- struct vmbus_channel *channel = (struct vmbus_channel *)data;
-
- if (channel->OnChannelCallback)
- channel->OnChannelCallback(channel->ChannelCallbackContext);
-}
-
-/*
- * DumpVmbusChannel - Dump vmbus channel info to the console
- */
-static void DumpVmbusChannel(struct vmbus_channel *Channel)
-{
- DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId);
- DumpRingInfo(&Channel->Outbound, "Outbound ");
- DumpRingInfo(&Channel->Inbound, "Inbound ");
-}
+++ /dev/null
-/*
- *
- * Copyright (c) 2009, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- *
- */
-
-
-#ifndef _CHANNEL_H_
-#define _CHANNEL_H_
-
-#include "ChannelMgmt.h"
-
-/* The format must be the same as struct vmdata_gpa_direct */
-struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
- u16 Type;
- u16 DataOffset8;
- u16 Length8;
- u16 Flags;
- u64 TransactionId;
- u32 Reserved;
- u32 RangeCount;
- struct hv_page_buffer Range[MAX_PAGE_BUFFER_COUNT];
-} __attribute__((packed));
-
-/* The format must be the same as struct vmdata_gpa_direct */
-struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
- u16 Type;
- u16 DataOffset8;
- u16 Length8;
- u16 Flags;
- u64 TransactionId;
- u32 Reserved;
- u32 RangeCount; /* Always 1 in this case */
- struct hv_multipage_buffer Range;
-} __attribute__((packed));
-
-
-extern int VmbusChannelOpen(struct vmbus_channel *channel,
- u32 SendRingBufferSize,
- u32 RecvRingBufferSize,
- void *UserData,
- u32 UserDataLen,
- void(*OnChannelCallback)(void *context),
- void *Context);
-
-extern void VmbusChannelClose(struct vmbus_channel *channel);
-
-extern int VmbusChannelSendPacket(struct vmbus_channel *channel,
- const void *Buffer,
- u32 BufferLen,
- u64 RequestId,
- enum vmbus_packet_type Type,
- u32 Flags);
-
-extern int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *channel,
- struct hv_page_buffer PageBuffers[],
- u32 PageCount,
- void *Buffer,
- u32 BufferLen,
- u64 RequestId);
-
-extern int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *channel,
- struct hv_multipage_buffer *mpb,
- void *Buffer,
- u32 BufferLen,
- u64 RequestId);
-
-extern int VmbusChannelEstablishGpadl(struct vmbus_channel *channel,
- void *Kbuffer,
- u32 Size,
- u32 *GpadlHandle);
-
-extern int VmbusChannelTeardownGpadl(struct vmbus_channel *channel,
- u32 GpadlHandle);
-
-extern int VmbusChannelRecvPacket(struct vmbus_channel *channel,
- void *Buffer,
- u32 BufferLen,
- u32 *BufferActualLen,
- u64 *RequestId);
-
-extern int VmbusChannelRecvPacketRaw(struct vmbus_channel *channel,
- void *Buffer,
- u32 BufferLen,
- u32 *BufferActualLen,
- u64 *RequestId);
-
-extern void VmbusChannelOnChannelEvent(struct vmbus_channel *channel);
-
-extern void VmbusChannelGetDebugInfo(struct vmbus_channel *channel,
- struct vmbus_channel_debug_info *debug);
-
-extern void VmbusChannelOnTimer(unsigned long data);
-
-#endif /* _CHANNEL_H_ */
obj-$(CONFIG_HYPERV_UTILS) += hv_utils.o
hv_vmbus-objs := vmbus_drv.o osd.o \
- Vmbus.o hv.o Connection.o Channel.o \
+ Vmbus.o hv.o Connection.o channel.o \
ChannelMgmt.o ChannelInterface.o RingBuffer.o
hv_storvsc-objs := storvsc_drv.o StorVsc.o
hv_blkvsc-objs := blkvsc_drv.o BlkVsc.o
#include "hv.h"
#include "VmbusApi.h"
-#include "Channel.h"
+#include "channel.h"
#include "ChannelMgmt.h"
#include "ChannelInterface.h"
#include "RingBuffer.h"
--- /dev/null
+/*
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include "osd.h"
+#include "logging.h"
+#include "VmbusPrivate.h"
+
+/* Internal routines */
+static int VmbusChannelCreateGpadlHeader(
+ void *Kbuffer, /* must be phys and virt contiguous */
+ u32 Size, /* page-size multiple */
+ struct vmbus_channel_msginfo **msgInfo,
+ u32 *MessageCount);
+static void DumpVmbusChannel(struct vmbus_channel *channel);
+static void VmbusChannelSetEvent(struct vmbus_channel *channel);
+
+
+#if 0
+static void DumpMonitorPage(struct hv_monitor_page *MonitorPage)
+{
+ int i = 0;
+ int j = 0;
+
+ DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d",
+ MonitorPage, MonitorPage->TriggerState);
+
+ for (i = 0; i < 4; i++)
+ DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i,
+ MonitorPage->TriggerGroup[i].AsUINT64);
+
+ for (i = 0; i < 4; i++) {
+ for (j = 0; j < 32; j++) {
+ DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j,
+ MonitorPage->Latency[i][j]);
+ }
+ }
+ for (i = 0; i < 4; i++) {
+ for (j = 0; j < 32; j++) {
+ DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j,
+ MonitorPage->Parameter[i][j].ConnectionId.Asu32);
+ DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j,
+ MonitorPage->Parameter[i][j].FlagNumber);
+ }
+ }
+}
+#endif
+
+/*
+ * VmbusChannelSetEvent - Trigger an event notification on the specified
+ * channel.
+ */
+static void VmbusChannelSetEvent(struct vmbus_channel *Channel)
+{
+ struct hv_monitor_page *monitorPage;
+
+ DPRINT_ENTER(VMBUS);
+
+ if (Channel->OfferMsg.MonitorAllocated) {
+ /* Each u32 represents 32 channels */
+ set_bit(Channel->OfferMsg.ChildRelId & 31,
+ (unsigned long *) gVmbusConnection.SendInterruptPage +
+ (Channel->OfferMsg.ChildRelId >> 5));
+
+ monitorPage = gVmbusConnection.MonitorPages;
+ monitorPage++; /* Get the child to parent monitor page */
+
+ set_bit(Channel->MonitorBit,
+ (unsigned long *)&monitorPage->TriggerGroup
+ [Channel->MonitorGroup].Pending);
+
+ } else {
+ VmbusSetEvent(Channel->OfferMsg.ChildRelId);
+ }
+
+ DPRINT_EXIT(VMBUS);
+}
+
+#if 0
+static void VmbusChannelClearEvent(struct vmbus_channel *channel)
+{
+ struct hv_monitor_page *monitorPage;
+
+ DPRINT_ENTER(VMBUS);
+
+ if (Channel->OfferMsg.MonitorAllocated) {
+ /* Each u32 represents 32 channels */
+ clear_bit(Channel->OfferMsg.ChildRelId & 31,
+ (unsigned long *)gVmbusConnection.SendInterruptPage +
+ (Channel->OfferMsg.ChildRelId >> 5));
+
+ monitorPage =
+ (struct hv_monitor_page *)gVmbusConnection.MonitorPages;
+ monitorPage++; /* Get the child to parent monitor page */
+
+ clear_bit(Channel->MonitorBit,
+ (unsigned long *)&monitorPage->TriggerGroup
+ [Channel->MonitorGroup].Pending);
+ }
+
+ DPRINT_EXIT(VMBUS);
+}
+
+#endif
+/*
+ * VmbusChannelGetDebugInfo -Retrieve various channel debug info
+ */
+void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel,
+ struct vmbus_channel_debug_info *DebugInfo)
+{
+ struct hv_monitor_page *monitorPage;
+ u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32;
+ u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32;
+ /* u32 monitorBit = 1 << monitorOffset; */
+
+ DebugInfo->RelId = Channel->OfferMsg.ChildRelId;
+ DebugInfo->State = Channel->State;
+ memcpy(&DebugInfo->InterfaceType,
+ &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid));
+ memcpy(&DebugInfo->InterfaceInstance,
+ &Channel->OfferMsg.Offer.InterfaceInstance,
+ sizeof(struct hv_guid));
+
+ monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages;
+
+ DebugInfo->MonitorId = Channel->OfferMsg.MonitorId;
+
+ DebugInfo->ServerMonitorPending =
+ monitorPage->TriggerGroup[monitorGroup].Pending;
+ DebugInfo->ServerMonitorLatency =
+ monitorPage->Latency[monitorGroup][monitorOffset];
+ DebugInfo->ServerMonitorConnectionId =
+ monitorPage->Parameter[monitorGroup]
+ [monitorOffset].ConnectionId.u.Id;
+
+ monitorPage++;
+
+ DebugInfo->ClientMonitorPending =
+ monitorPage->TriggerGroup[monitorGroup].Pending;
+ DebugInfo->ClientMonitorLatency =
+ monitorPage->Latency[monitorGroup][monitorOffset];
+ DebugInfo->ClientMonitorConnectionId =
+ monitorPage->Parameter[monitorGroup]
+ [monitorOffset].ConnectionId.u.Id;
+
+ RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound);
+ RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound);
+}
+
+/*
+ * VmbusChannelOpen - Open the specified channel.
+ */
+int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize,
+ u32 RecvRingBufferSize, void *UserData, u32 UserDataLen,
+ void (*OnChannelCallback)(void *context), void *Context)
+{
+ struct vmbus_channel_open_channel *openMsg;
+ struct vmbus_channel_msginfo *openInfo = NULL;
+ void *in, *out;
+ unsigned long flags;
+ int ret, err = 0;
+
+ DPRINT_ENTER(VMBUS);
+
+ /* Aligned to page size */
+ /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */
+ /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */
+
+ NewChannel->OnChannelCallback = OnChannelCallback;
+ NewChannel->ChannelCallbackContext = Context;
+
+ /* Allocate the ring buffer */
+ out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize)
+ >> PAGE_SHIFT);
+ if (!out)
+ return -ENOMEM;
+
+ /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */
+
+ in = (void *)((unsigned long)out + SendRingBufferSize);
+
+ NewChannel->RingBufferPages = out;
+ NewChannel->RingBufferPageCount = (SendRingBufferSize +
+ RecvRingBufferSize) >> PAGE_SHIFT;
+
+ ret = RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize);
+ if (!ret) {
+ err = ret;
+ goto errorout;
+ }
+
+ ret = RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize);
+ if (!ret) {
+ err = ret;
+ goto errorout;
+ }
+
+
+ /* Establish the gpadl for the ring buffer */
+ DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...",
+ NewChannel);
+
+ NewChannel->RingBufferGpadlHandle = 0;
+
+ ret = VmbusChannelEstablishGpadl(NewChannel,
+ NewChannel->Outbound.RingBuffer,
+ SendRingBufferSize +
+ RecvRingBufferSize,
+ &NewChannel->RingBufferGpadlHandle);
+
+ if (!ret) {
+ err = ret;
+ goto errorout;
+ }
+
+ DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p "
+ "size %d recv ring %p size %d, downstreamoffset %d>",
+ NewChannel, NewChannel->OfferMsg.ChildRelId,
+ NewChannel->RingBufferGpadlHandle,
+ NewChannel->Outbound.RingBuffer,
+ NewChannel->Outbound.RingSize,
+ NewChannel->Inbound.RingBuffer,
+ NewChannel->Inbound.RingSize,
+ SendRingBufferSize);
+
+ /* Create and init the channel open message */
+ openInfo = kmalloc(sizeof(*openInfo) +
+ sizeof(struct vmbus_channel_open_channel),
+ GFP_KERNEL);
+ if (!openInfo) {
+ err = -ENOMEM;
+ goto errorout;
+ }
+
+ openInfo->WaitEvent = osd_WaitEventCreate();
+ if (!openInfo->WaitEvent) {
+ err = -ENOMEM;
+ goto errorout;
+ }
+
+ openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg;
+ openMsg->Header.MessageType = ChannelMessageOpenChannel;
+ openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */
+ openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId;
+ openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle;
+ openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >>
+ PAGE_SHIFT;
+ openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */
+
+ if (UserDataLen > MAX_USER_DEFINED_BYTES) {
+ err = -EINVAL;
+ goto errorout;
+ }
+
+ if (UserDataLen)
+ memcpy(openMsg->UserData, UserData, UserDataLen);
+
+ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
+ list_add_tail(&openInfo->MsgListEntry,
+ &gVmbusConnection.ChannelMsgList);
+ spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
+
+ DPRINT_DBG(VMBUS, "Sending channel open msg...");
+
+ ret = VmbusPostMessage(openMsg,
+ sizeof(struct vmbus_channel_open_channel));
+ if (ret != 0) {
+ DPRINT_ERR(VMBUS, "unable to open channel - %d", ret);
+ goto Cleanup;
+ }
+
+ /* FIXME: Need to time-out here */
+ osd_WaitEventWait(openInfo->WaitEvent);
+
+ if (openInfo->Response.OpenResult.Status == 0)
+ DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel);
+ else
+ DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!",
+ NewChannel, openInfo->Response.OpenResult.Status);
+
+Cleanup:
+ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
+ list_del(&openInfo->MsgListEntry);
+ spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
+
+ kfree(openInfo->WaitEvent);
+ kfree(openInfo);
+
+ DPRINT_EXIT(VMBUS);
+
+ return 0;
+
+errorout:
+ RingBufferCleanup(&NewChannel->Outbound);
+ RingBufferCleanup(&NewChannel->Inbound);
+ osd_PageFree(out, (SendRingBufferSize + RecvRingBufferSize)
+ >> PAGE_SHIFT);
+ kfree(openInfo);
+ return err;
+}
+
+/*
+ * DumpGpadlBody - Dump the gpadl body message to the console for
+ * debugging purposes.
+ */
+static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len)
+{
+ int i;
+ int pfnCount;
+
+ pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) /
+ sizeof(u64);
+ DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount);
+
+ for (i = 0; i < pfnCount; i++)
+ DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu",
+ i, Gpadl->Pfn[i]);
+}
+
+/*
+ * DumpGpadlHeader - Dump the gpadl header message to the console for
+ * debugging purposes.
+ */
+static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl)
+{
+ int i, j;
+ int pageCount;
+
+ DPRINT_DBG(VMBUS,
+ "gpadl header - relid %d, range count %d, range buflen %d",
+ Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen);
+ for (i = 0; i < Gpadl->RangeCount; i++) {
+ pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT;
+ pageCount = (pageCount > 26) ? 26 : pageCount;
+
+ DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d "
+ "page count %d", i, Gpadl->Range[i].ByteCount,
+ Gpadl->Range[i].ByteOffset, pageCount);
+
+ for (j = 0; j < pageCount; j++)
+ DPRINT_DBG(VMBUS, "%d) pfn %llu", j,
+ Gpadl->Range[i].PfnArray[j]);
+ }
+}
+
+/*
+ * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer
+ */
+static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size,
+ struct vmbus_channel_msginfo **MsgInfo,
+ u32 *MessageCount)
+{
+ int i;
+ int pageCount;
+ unsigned long long pfn;
+ struct vmbus_channel_gpadl_header *gpaHeader;
+ struct vmbus_channel_gpadl_body *gpadlBody;
+ struct vmbus_channel_msginfo *msgHeader;
+ struct vmbus_channel_msginfo *msgBody = NULL;
+ u32 msgSize;
+
+ int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize;
+
+ /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */
+ /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */
+
+ pageCount = Size >> PAGE_SHIFT;
+ pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT;
+
+ /* do we need a gpadl body msg */
+ pfnSize = MAX_SIZE_CHANNEL_MESSAGE -
+ sizeof(struct vmbus_channel_gpadl_header) -
+ sizeof(struct gpa_range);
+ pfnCount = pfnSize / sizeof(u64);
+
+ if (pageCount > pfnCount) {
+ /* we need a gpadl body */
+ /* fill in the header */
+ msgSize = sizeof(struct vmbus_channel_msginfo) +
+ sizeof(struct vmbus_channel_gpadl_header) +
+ sizeof(struct gpa_range) + pfnCount * sizeof(u64);
+ msgHeader = kzalloc(msgSize, GFP_KERNEL);
+ if (!msgHeader)
+ goto nomem;
+
+ INIT_LIST_HEAD(&msgHeader->SubMsgList);
+ msgHeader->MessageSize = msgSize;
+
+ gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg;
+ gpaHeader->RangeCount = 1;
+ gpaHeader->RangeBufLen = sizeof(struct gpa_range) +
+ pageCount * sizeof(u64);
+ gpaHeader->Range[0].ByteOffset = 0;
+ gpaHeader->Range[0].ByteCount = Size;
+ for (i = 0; i < pfnCount; i++)
+ gpaHeader->Range[0].PfnArray[i] = pfn+i;
+ *MsgInfo = msgHeader;
+ *MessageCount = 1;
+
+ pfnSum = pfnCount;
+ pfnLeft = pageCount - pfnCount;
+
+ /* how many pfns can we fit */
+ pfnSize = MAX_SIZE_CHANNEL_MESSAGE -
+ sizeof(struct vmbus_channel_gpadl_body);
+ pfnCount = pfnSize / sizeof(u64);
+
+ /* fill in the body */
+ while (pfnLeft) {
+ if (pfnLeft > pfnCount)
+ pfnCurr = pfnCount;
+ else
+ pfnCurr = pfnLeft;
+
+ msgSize = sizeof(struct vmbus_channel_msginfo) +
+ sizeof(struct vmbus_channel_gpadl_body) +
+ pfnCurr * sizeof(u64);
+ msgBody = kzalloc(msgSize, GFP_KERNEL);
+ /* FIXME: we probably need to more if this fails */
+ if (!msgBody)
+ goto nomem;
+ msgBody->MessageSize = msgSize;
+ (*MessageCount)++;
+ gpadlBody =
+ (struct vmbus_channel_gpadl_body *)msgBody->Msg;
+
+ /*
+ * FIXME:
+ * Gpadl is u32 and we are using a pointer which could
+ * be 64-bit
+ */
+ /* gpadlBody->Gpadl = kbuffer; */
+ for (i = 0; i < pfnCurr; i++)
+ gpadlBody->Pfn[i] = pfn + pfnSum + i;
+
+ /* add to msg header */
+ list_add_tail(&msgBody->MsgListEntry,
+ &msgHeader->SubMsgList);
+ pfnSum += pfnCurr;
+ pfnLeft -= pfnCurr;
+ }
+ } else {
+ /* everything fits in a header */
+ msgSize = sizeof(struct vmbus_channel_msginfo) +
+ sizeof(struct vmbus_channel_gpadl_header) +
+ sizeof(struct gpa_range) + pageCount * sizeof(u64);
+ msgHeader = kzalloc(msgSize, GFP_KERNEL);
+ msgHeader->MessageSize = msgSize;
+
+ gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg;
+ gpaHeader->RangeCount = 1;
+ gpaHeader->RangeBufLen = sizeof(struct gpa_range) +
+ pageCount * sizeof(u64);
+ gpaHeader->Range[0].ByteOffset = 0;
+ gpaHeader->Range[0].ByteCount = Size;
+ for (i = 0; i < pageCount; i++)
+ gpaHeader->Range[0].PfnArray[i] = pfn+i;
+
+ *MsgInfo = msgHeader;
+ *MessageCount = 1;
+ }
+
+ return 0;
+nomem:
+ kfree(msgHeader);
+ kfree(msgBody);
+ return -ENOMEM;
+}
+
+/*
+ * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer
+ *
+ * @Channel: a channel
+ * @Kbuffer: from kmalloc
+ * @Size: page-size multiple
+ * @GpadlHandle: some funky thing
+ */
+int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer,
+ u32 Size, u32 *GpadlHandle)
+{
+ struct vmbus_channel_gpadl_header *gpadlMsg;
+ struct vmbus_channel_gpadl_body *gpadlBody;
+ /* struct vmbus_channel_gpadl_created *gpadlCreated; */
+ struct vmbus_channel_msginfo *msgInfo = NULL;
+ struct vmbus_channel_msginfo *subMsgInfo;
+ u32 msgCount;
+ struct list_head *curr;
+ u32 nextGpadlHandle;
+ unsigned long flags;
+ int ret = 0;
+
+ DPRINT_ENTER(VMBUS);
+
+ nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle);
+ atomic_inc(&gVmbusConnection.NextGpadlHandle);
+
+ ret = VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount);
+ if (ret)
+ return ret;
+
+ msgInfo->WaitEvent = osd_WaitEventCreate();
+ if (!msgInfo->WaitEvent) {
+ ret = -ENOMEM;
+ goto Cleanup;
+ }
+
+ gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg;
+ gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader;
+ gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId;
+ gpadlMsg->Gpadl = nextGpadlHandle;
+
+ DumpGpadlHeader(gpadlMsg);
+
+ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
+ list_add_tail(&msgInfo->MsgListEntry,
+ &gVmbusConnection.ChannelMsgList);
+
+ spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
+ DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d",
+ Kbuffer, Size, msgCount);
+
+ DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd",
+ msgInfo->MessageSize - sizeof(*msgInfo));
+
+ ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize -
+ sizeof(*msgInfo));
+ if (ret != 0) {
+ DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret);
+ goto Cleanup;
+ }
+
+ if (msgCount > 1) {
+ list_for_each(curr, &msgInfo->SubMsgList) {
+
+ /* FIXME: should this use list_entry() instead ? */
+ subMsgInfo = (struct vmbus_channel_msginfo *)curr;
+ gpadlBody =
+ (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg;
+
+ gpadlBody->Header.MessageType = ChannelMessageGpadlBody;
+ gpadlBody->Gpadl = nextGpadlHandle;
+
+ DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd",
+ subMsgInfo->MessageSize -
+ sizeof(*subMsgInfo));
+
+ DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize -
+ sizeof(*subMsgInfo));
+ ret = VmbusPostMessage(gpadlBody,
+ subMsgInfo->MessageSize -
+ sizeof(*subMsgInfo));
+ if (!ret)
+ goto Cleanup;
+
+ }
+ }
+ osd_WaitEventWait(msgInfo->WaitEvent);
+
+ /* At this point, we received the gpadl created msg */
+ DPRINT_DBG(VMBUS, "Received GPADL created "
+ "(relid %d, status %d handle %x)",
+ Channel->OfferMsg.ChildRelId,
+ msgInfo->Response.GpadlCreated.CreationStatus,
+ gpadlMsg->Gpadl);
+
+ *GpadlHandle = gpadlMsg->Gpadl;
+
+Cleanup:
+ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
+ list_del(&msgInfo->MsgListEntry);
+ spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
+
+ kfree(msgInfo->WaitEvent);
+ kfree(msgInfo);
+
+ DPRINT_EXIT(VMBUS);
+
+ return ret;
+}
+
+/*
+ * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle
+ */
+int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle)
+{
+ struct vmbus_channel_gpadl_teardown *msg;
+ struct vmbus_channel_msginfo *info;
+ unsigned long flags;
+ int ret;
+
+ DPRINT_ENTER(VMBUS);
+
+ /* ASSERT(GpadlHandle != 0); */
+
+ info = kmalloc(sizeof(*info) +
+ sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->WaitEvent = osd_WaitEventCreate();
+ if (!info->WaitEvent) {
+ kfree(info);
+ return -ENOMEM;
+ }
+
+ msg = (struct vmbus_channel_gpadl_teardown *)info->Msg;
+
+ msg->Header.MessageType = ChannelMessageGpadlTeardown;
+ msg->ChildRelId = Channel->OfferMsg.ChildRelId;
+ msg->Gpadl = GpadlHandle;
+
+ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
+ list_add_tail(&info->MsgListEntry,
+ &gVmbusConnection.ChannelMsgList);
+ spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
+
+ ret = VmbusPostMessage(msg,
+ sizeof(struct vmbus_channel_gpadl_teardown));
+ if (ret != 0) {
+ /* TODO: */
+ /* something... */
+ }
+
+ osd_WaitEventWait(info->WaitEvent);
+
+ /* Received a torndown response */
+ spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
+ list_del(&info->MsgListEntry);
+ spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
+
+ kfree(info->WaitEvent);
+ kfree(info);
+
+ DPRINT_EXIT(VMBUS);
+
+ return ret;
+}
+
+/*
+ * VmbusChannelClose - Close the specified channel
+ */
+void VmbusChannelClose(struct vmbus_channel *Channel)
+{
+ struct vmbus_channel_close_channel *msg;
+ struct vmbus_channel_msginfo *info;
+ unsigned long flags;
+ int ret;
+
+ DPRINT_ENTER(VMBUS);
+
+ /* Stop callback and cancel the timer asap */
+ Channel->OnChannelCallback = NULL;
+ del_timer_sync(&Channel->poll_timer);
+
+ /* Send a closing message */
+ info = kmalloc(sizeof(*info) +
+ sizeof(struct vmbus_channel_close_channel), GFP_KERNEL);
+ /* FIXME: can't do anything other than return here because the
+ * function is void */
+ if (!info)
+ return;
+
+ /* info->waitEvent = osd_WaitEventCreate(); */
+
+ msg = (struct vmbus_channel_close_channel *)info->Msg;
+ msg->Header.MessageType = ChannelMessageCloseChannel;
+ msg->ChildRelId = Channel->OfferMsg.ChildRelId;
+
+ ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel));
+ if (ret != 0) {
+ /* TODO: */
+ /* something... */
+ }
+
+ /* Tear down the gpadl for the channel's ring buffer */
+ if (Channel->RingBufferGpadlHandle)
+ VmbusChannelTeardownGpadl(Channel,
+ Channel->RingBufferGpadlHandle);
+
+ /* TODO: Send a msg to release the childRelId */
+
+ /* Cleanup the ring buffers for this channel */
+ RingBufferCleanup(&Channel->Outbound);
+ RingBufferCleanup(&Channel->Inbound);
+
+ osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount);
+
+ kfree(info);
+
+ /*
+ * If we are closing the channel during an error path in
+ * opening the channel, don't free the channel since the
+ * caller will free the channel
+ */
+
+ if (Channel->State == CHANNEL_OPEN_STATE) {
+ spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
+ list_del(&Channel->ListEntry);
+ spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);
+
+ FreeVmbusChannel(Channel);
+ }
+
+ DPRINT_EXIT(VMBUS);
+}
+
+/**
+ * VmbusChannelSendPacket() - Send the specified buffer on the given channel
+ * @Channel: Pointer to vmbus_channel structure.
+ * @Buffer: Pointer to the buffer you want to receive the data into.
+ * @BufferLen: Maximum size of what the the buffer will hold
+ * @RequestId: Identifier of the request
+ * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time
+ * packet etc.
+ *
+ * Sends data in @Buffer directly to hyper-v via the vmbus
+ * This will send the data unparsed to hyper-v.
+ *
+ * Mainly used by Hyper-V drivers.
+ */
+int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,
+ u32 BufferLen, u64 RequestId,
+ enum vmbus_packet_type Type, u32 Flags)
+{
+ struct vmpacket_descriptor desc;
+ u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen;
+ u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
+ struct scatterlist bufferList[3];
+ u64 alignedData = 0;
+ int ret;
+
+ DPRINT_ENTER(VMBUS);
+ DPRINT_DBG(VMBUS, "channel %p buffer %p len %d",
+ Channel, Buffer, BufferLen);
+
+ DumpVmbusChannel(Channel);
+
+ /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
+
+ /* Setup the descriptor */
+ desc.Type = Type; /* VmbusPacketTypeDataInBand; */
+ desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */
+ /* in 8-bytes granularity */
+ desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3;
+ desc.Length8 = (u16)(packetLenAligned >> 3);
+ desc.TransactionId = RequestId;
+
+ sg_init_table(bufferList, 3);
+ sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor));
+ sg_set_buf(&bufferList[1], Buffer, BufferLen);
+ sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
+
+ ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
+
+ /* TODO: We should determine if this is optional */
+ if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
+ VmbusChannelSetEvent(Channel);
+
+ DPRINT_EXIT(VMBUS);
+
+ return ret;
+}
+EXPORT_SYMBOL(VmbusChannelSendPacket);
+
+/*
+ * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer
+ * packets using a GPADL Direct packet type.
+ */
+int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel,
+ struct hv_page_buffer PageBuffers[],
+ u32 PageCount, void *Buffer, u32 BufferLen,
+ u64 RequestId)
+{
+ int ret;
+ int i;
+ struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc;
+ u32 descSize;
+ u32 packetLen;
+ u32 packetLenAligned;
+ struct scatterlist bufferList[3];
+ u64 alignedData = 0;
+
+ DPRINT_ENTER(VMBUS);
+
+ if (PageCount > MAX_PAGE_BUFFER_COUNT)
+ return -EINVAL;
+
+ DumpVmbusChannel(Channel);
+
+ /*
+ * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the
+ * largest size we support
+ */
+ descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) -
+ ((MAX_PAGE_BUFFER_COUNT - PageCount) *
+ sizeof(struct hv_page_buffer));
+ packetLen = descSize + BufferLen;
+ packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
+
+ /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
+
+ /* Setup the descriptor */
+ desc.Type = VmbusPacketTypeDataUsingGpaDirect;
+ desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
+ desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */
+ desc.Length8 = (u16)(packetLenAligned >> 3);
+ desc.TransactionId = RequestId;
+ desc.RangeCount = PageCount;
+
+ for (i = 0; i < PageCount; i++) {
+ desc.Range[i].Length = PageBuffers[i].Length;
+ desc.Range[i].Offset = PageBuffers[i].Offset;
+ desc.Range[i].Pfn = PageBuffers[i].Pfn;
+ }
+
+ sg_init_table(bufferList, 3);
+ sg_set_buf(&bufferList[0], &desc, descSize);
+ sg_set_buf(&bufferList[1], Buffer, BufferLen);
+ sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
+
+ ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
+
+ /* TODO: We should determine if this is optional */
+ if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
+ VmbusChannelSetEvent(Channel);
+
+ DPRINT_EXIT(VMBUS);
+
+ return ret;
+}
+
+/*
+ * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet
+ * using a GPADL Direct packet type.
+ */
+int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel,
+ struct hv_multipage_buffer *MultiPageBuffer,
+ void *Buffer, u32 BufferLen, u64 RequestId)
+{
+ int ret;
+ struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc;
+ u32 descSize;
+ u32 packetLen;
+ u32 packetLenAligned;
+ struct scatterlist bufferList[3];
+ u64 alignedData = 0;
+ u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset,
+ MultiPageBuffer->Length);
+
+ DPRINT_ENTER(VMBUS);
+
+ DumpVmbusChannel(Channel);
+
+ DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u",
+ MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount);
+
+ if ((PfnCount < 0) || (PfnCount > MAX_MULTIPAGE_BUFFER_COUNT))
+ return -EINVAL;
+
+ /*
+ * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is
+ * the largest size we support
+ */
+ descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) -
+ ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) *
+ sizeof(u64));
+ packetLen = descSize + BufferLen;
+ packetLenAligned = ALIGN_UP(packetLen, sizeof(u64));
+
+ /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */
+
+ /* Setup the descriptor */
+ desc.Type = VmbusPacketTypeDataUsingGpaDirect;
+ desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
+ desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */
+ desc.Length8 = (u16)(packetLenAligned >> 3);
+ desc.TransactionId = RequestId;
+ desc.RangeCount = 1;
+
+ desc.Range.Length = MultiPageBuffer->Length;
+ desc.Range.Offset = MultiPageBuffer->Offset;
+
+ memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray,
+ PfnCount * sizeof(u64));
+
+ sg_init_table(bufferList, 3);
+ sg_set_buf(&bufferList[0], &desc, descSize);
+ sg_set_buf(&bufferList[1], Buffer, BufferLen);
+ sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen);
+
+ ret = RingBufferWrite(&Channel->Outbound, bufferList, 3);
+
+ /* TODO: We should determine if this is optional */
+ if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound))
+ VmbusChannelSetEvent(Channel);
+
+ DPRINT_EXIT(VMBUS);
+
+ return ret;
+}
+
+
+/**
+ * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel
+ * @Channel: Pointer to vmbus_channel structure.
+ * @Buffer: Pointer to the buffer you want to receive the data into.
+ * @BufferLen: Maximum size of what the the buffer will hold
+ * @BufferActualLen: The actual size of the data after it was received
+ * @RequestId: Identifier of the request
+ *
+ * Receives directly from the hyper-v vmbus and puts the data it received
+ * into Buffer. This will receive the data unparsed from hyper-v.
+ *
+ * Mainly used by Hyper-V drivers.
+ */
+int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,
+ u32 BufferLen, u32 *BufferActualLen, u64 *RequestId)
+{
+ struct vmpacket_descriptor desc;
+ u32 packetLen;
+ u32 userLen;
+ int ret;
+ unsigned long flags;
+
+ DPRINT_ENTER(VMBUS);
+
+ *BufferActualLen = 0;
+ *RequestId = 0;
+
+ spin_lock_irqsave(&Channel->inbound_lock, flags);
+
+ ret = RingBufferPeek(&Channel->Inbound, &desc,
+ sizeof(struct vmpacket_descriptor));
+ if (ret != 0) {
+ spin_unlock_irqrestore(&Channel->inbound_lock, flags);
+
+ /* DPRINT_DBG(VMBUS, "nothing to read!!"); */
+ DPRINT_EXIT(VMBUS);
+ return 0;
+ }
+
+ /* VmbusChannelClearEvent(Channel); */
+
+ packetLen = desc.Length8 << 3;
+ userLen = packetLen - (desc.DataOffset8 << 3);
+ /* ASSERT(userLen > 0); */
+
+ DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d "
+ "flag %d tid %llx pktlen %d datalen %d> ",
+ Channel, Channel->OfferMsg.ChildRelId, desc.Type,
+ desc.Flags, desc.TransactionId, packetLen, userLen);
+
+ *BufferActualLen = userLen;
+
+ if (userLen > BufferLen) {
+ spin_unlock_irqrestore(&Channel->inbound_lock, flags);
+
+ DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d",
+ BufferLen, userLen);
+ DPRINT_EXIT(VMBUS);
+
+ return -1;
+ }
+
+ *RequestId = desc.TransactionId;
+
+ /* Copy over the packet to the user buffer */
+ ret = RingBufferRead(&Channel->Inbound, Buffer, userLen,
+ (desc.DataOffset8 << 3));
+
+ spin_unlock_irqrestore(&Channel->inbound_lock, flags);
+
+ DPRINT_EXIT(VMBUS);
+
+ return 0;
+}
+EXPORT_SYMBOL(VmbusChannelRecvPacket);
+
+/*
+ * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel
+ */
+int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer,
+ u32 BufferLen, u32 *BufferActualLen,
+ u64 *RequestId)
+{
+ struct vmpacket_descriptor desc;
+ u32 packetLen;
+ u32 userLen;
+ int ret;
+ unsigned long flags;
+
+ DPRINT_ENTER(VMBUS);
+
+ *BufferActualLen = 0;
+ *RequestId = 0;
+
+ spin_lock_irqsave(&Channel->inbound_lock, flags);
+
+ ret = RingBufferPeek(&Channel->Inbound, &desc,
+ sizeof(struct vmpacket_descriptor));
+ if (ret != 0) {
+ spin_unlock_irqrestore(&Channel->inbound_lock, flags);
+
+ /* DPRINT_DBG(VMBUS, "nothing to read!!"); */
+ DPRINT_EXIT(VMBUS);
+ return 0;
+ }
+
+ /* VmbusChannelClearEvent(Channel); */
+
+ packetLen = desc.Length8 << 3;
+ userLen = packetLen - (desc.DataOffset8 << 3);
+
+ DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d "
+ "flag %d tid %llx pktlen %d datalen %d> ",
+ Channel, Channel->OfferMsg.ChildRelId, desc.Type,
+ desc.Flags, desc.TransactionId, packetLen, userLen);
+
+ *BufferActualLen = packetLen;
+
+ if (packetLen > BufferLen) {
+ spin_unlock_irqrestore(&Channel->inbound_lock, flags);
+
+ DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but "
+ "got space for only %d bytes", packetLen, BufferLen);
+ DPRINT_EXIT(VMBUS);
+ return -2;
+ }
+
+ *RequestId = desc.TransactionId;
+
+ /* Copy over the entire packet to the user buffer */
+ ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0);
+
+ spin_unlock_irqrestore(&Channel->inbound_lock, flags);
+
+ DPRINT_EXIT(VMBUS);
+
+ return 0;
+}
+
+/*
+ * VmbusChannelOnChannelEvent - Channel event callback
+ */
+void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel)
+{
+ DumpVmbusChannel(Channel);
+ /* ASSERT(Channel->OnChannelCallback); */
+
+ Channel->OnChannelCallback(Channel->ChannelCallbackContext);
+
+ mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100));
+}
+
+/*
+ * VmbusChannelOnTimer - Timer event callback
+ */
+void VmbusChannelOnTimer(unsigned long data)
+{
+ struct vmbus_channel *channel = (struct vmbus_channel *)data;
+
+ if (channel->OnChannelCallback)
+ channel->OnChannelCallback(channel->ChannelCallbackContext);
+}
+
+/*
+ * DumpVmbusChannel - Dump vmbus channel info to the console
+ */
+static void DumpVmbusChannel(struct vmbus_channel *Channel)
+{
+ DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId);
+ DumpRingInfo(&Channel->Outbound, "Outbound ");
+ DumpRingInfo(&Channel->Inbound, "Inbound ");
+}
--- /dev/null
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ *
+ */
+
+
+#ifndef _CHANNEL_H_
+#define _CHANNEL_H_
+
+#include "ChannelMgmt.h"
+
+/* The format must be the same as struct vmdata_gpa_direct */
+struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
+ u16 Type;
+ u16 DataOffset8;
+ u16 Length8;
+ u16 Flags;
+ u64 TransactionId;
+ u32 Reserved;
+ u32 RangeCount;
+ struct hv_page_buffer Range[MAX_PAGE_BUFFER_COUNT];
+} __attribute__((packed));
+
+/* The format must be the same as struct vmdata_gpa_direct */
+struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
+ u16 Type;
+ u16 DataOffset8;
+ u16 Length8;
+ u16 Flags;
+ u64 TransactionId;
+ u32 Reserved;
+ u32 RangeCount; /* Always 1 in this case */
+ struct hv_multipage_buffer Range;
+} __attribute__((packed));
+
+
+extern int VmbusChannelOpen(struct vmbus_channel *channel,
+ u32 SendRingBufferSize,
+ u32 RecvRingBufferSize,
+ void *UserData,
+ u32 UserDataLen,
+ void(*OnChannelCallback)(void *context),
+ void *Context);
+
+extern void VmbusChannelClose(struct vmbus_channel *channel);
+
+extern int VmbusChannelSendPacket(struct vmbus_channel *channel,
+ const void *Buffer,
+ u32 BufferLen,
+ u64 RequestId,
+ enum vmbus_packet_type Type,
+ u32 Flags);
+
+extern int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *channel,
+ struct hv_page_buffer PageBuffers[],
+ u32 PageCount,
+ void *Buffer,
+ u32 BufferLen,
+ u64 RequestId);
+
+extern int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *channel,
+ struct hv_multipage_buffer *mpb,
+ void *Buffer,
+ u32 BufferLen,
+ u64 RequestId);
+
+extern int VmbusChannelEstablishGpadl(struct vmbus_channel *channel,
+ void *Kbuffer,
+ u32 Size,
+ u32 *GpadlHandle);
+
+extern int VmbusChannelTeardownGpadl(struct vmbus_channel *channel,
+ u32 GpadlHandle);
+
+extern int VmbusChannelRecvPacket(struct vmbus_channel *channel,
+ void *Buffer,
+ u32 BufferLen,
+ u32 *BufferActualLen,
+ u64 *RequestId);
+
+extern int VmbusChannelRecvPacketRaw(struct vmbus_channel *channel,
+ void *Buffer,
+ u32 BufferLen,
+ u32 *BufferActualLen,
+ u64 *RequestId);
+
+extern void VmbusChannelOnChannelEvent(struct vmbus_channel *channel);
+
+extern void VmbusChannelGetDebugInfo(struct vmbus_channel *channel,
+ struct vmbus_channel_debug_info *debug);
+
+extern void VmbusChannelOnTimer(unsigned long data);
+
+#endif /* _CHANNEL_H_ */
#include "VmbusPacketFormat.h"
#include "VmbusChannelInterface.h"
#include "VersionInfo.h"
-#include "Channel.h"
+#include "channel.h"
#include "VmbusPrivate.h"
#include "VmbusApi.h"
#include "utils.h"
projects / deliverable / linux.git / commitdiff
