1058 lines
30 KiB
C
1058 lines
30 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "osd.h"
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#include "logging.h"
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#include "vmbus_private.h"
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/* Internal routines */
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static int create_gpadl_header(
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void *kbuffer, /* must be phys and virt contiguous */
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u32 size, /* page-size multiple */
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struct vmbus_channel_msginfo **msginfo,
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u32 *messagecount);
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static void dump_vmbus_channel(struct vmbus_channel *channel);
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static void vmbus_setevent(struct vmbus_channel *channel);
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#if 0
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static void DumpMonitorPage(struct hv_monitor_page *MonitorPage)
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{
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int i = 0;
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int j = 0;
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DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d",
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MonitorPage, MonitorPage->TriggerState);
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for (i = 0; i < 4; i++)
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DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i,
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MonitorPage->TriggerGroup[i].AsUINT64);
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 32; j++) {
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DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j,
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MonitorPage->Latency[i][j]);
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}
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}
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 32; j++) {
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DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j,
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MonitorPage->Parameter[i][j].ConnectionId.Asu32);
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DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j,
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MonitorPage->Parameter[i][j].FlagNumber);
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}
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}
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}
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#endif
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/*
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* vmbus_setevent- Trigger an event notification on the specified
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* channel.
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*/
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static void vmbus_setevent(struct vmbus_channel *channel)
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{
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struct hv_monitor_page *monitorpage;
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if (channel->OfferMsg.MonitorAllocated) {
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/* Each u32 represents 32 channels */
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set_bit(channel->OfferMsg.ChildRelId & 31,
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(unsigned long *) gVmbusConnection.SendInterruptPage +
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(channel->OfferMsg.ChildRelId >> 5));
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monitorpage = gVmbusConnection.MonitorPages;
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monitorpage++; /* Get the child to parent monitor page */
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set_bit(channel->MonitorBit,
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(unsigned long *)&monitorpage->TriggerGroup
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[channel->MonitorGroup].Pending);
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} else {
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VmbusSetEvent(channel->OfferMsg.ChildRelId);
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}
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}
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#if 0
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static void VmbusChannelClearEvent(struct vmbus_channel *channel)
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{
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struct hv_monitor_page *monitorPage;
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if (Channel->OfferMsg.MonitorAllocated) {
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/* Each u32 represents 32 channels */
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clear_bit(Channel->OfferMsg.ChildRelId & 31,
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(unsigned long *)gVmbusConnection.SendInterruptPage +
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(Channel->OfferMsg.ChildRelId >> 5));
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monitorPage =
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(struct hv_monitor_page *)gVmbusConnection.MonitorPages;
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monitorPage++; /* Get the child to parent monitor page */
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clear_bit(Channel->MonitorBit,
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(unsigned long *)&monitorPage->TriggerGroup
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[Channel->MonitorGroup].Pending);
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}
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}
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#endif
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/*
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* vmbus_get_debug_info -Retrieve various channel debug info
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*/
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void vmbus_get_debug_info(struct vmbus_channel *channel,
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struct vmbus_channel_debug_info *debuginfo)
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{
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struct hv_monitor_page *monitorpage;
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u8 monitor_group = (u8)channel->OfferMsg.MonitorId / 32;
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u8 monitor_offset = (u8)channel->OfferMsg.MonitorId % 32;
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/* u32 monitorBit = 1 << monitorOffset; */
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debuginfo->RelId = channel->OfferMsg.ChildRelId;
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debuginfo->State = channel->State;
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memcpy(&debuginfo->InterfaceType,
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&channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid));
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memcpy(&debuginfo->InterfaceInstance,
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&channel->OfferMsg.Offer.InterfaceInstance,
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sizeof(struct hv_guid));
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monitorpage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages;
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debuginfo->MonitorId = channel->OfferMsg.MonitorId;
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debuginfo->ServerMonitorPending =
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monitorpage->TriggerGroup[monitor_group].Pending;
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debuginfo->ServerMonitorLatency =
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monitorpage->Latency[monitor_group][monitor_offset];
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debuginfo->ServerMonitorConnectionId =
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monitorpage->Parameter[monitor_group]
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[monitor_offset].ConnectionId.u.Id;
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monitorpage++;
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debuginfo->ClientMonitorPending =
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monitorpage->TriggerGroup[monitor_group].Pending;
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debuginfo->ClientMonitorLatency =
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monitorpage->Latency[monitor_group][monitor_offset];
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debuginfo->ClientMonitorConnectionId =
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monitorpage->Parameter[monitor_group]
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[monitor_offset].ConnectionId.u.Id;
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RingBufferGetDebugInfo(&channel->Inbound, &debuginfo->Inbound);
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RingBufferGetDebugInfo(&channel->Outbound, &debuginfo->Outbound);
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}
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/*
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* vmbus_open - Open the specified channel.
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*/
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int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
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u32 recv_ringbuffer_size, void *userdata, u32 userdatalen,
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void (*onchannelcallback)(void *context), void *context)
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{
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struct vmbus_channel_open_channel *openMsg;
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struct vmbus_channel_msginfo *openInfo = NULL;
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void *in, *out;
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unsigned long flags;
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int ret, err = 0;
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/* Aligned to page size */
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/* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */
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/* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */
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newchannel->OnChannelCallback = onchannelcallback;
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newchannel->ChannelCallbackContext = context;
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/* Allocate the ring buffer */
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out = osd_PageAlloc((send_ringbuffer_size + recv_ringbuffer_size)
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>> PAGE_SHIFT);
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if (!out)
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return -ENOMEM;
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/* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */
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in = (void *)((unsigned long)out + send_ringbuffer_size);
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newchannel->RingBufferPages = out;
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newchannel->RingBufferPageCount = (send_ringbuffer_size +
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recv_ringbuffer_size) >> PAGE_SHIFT;
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ret = RingBufferInit(&newchannel->Outbound, out, send_ringbuffer_size);
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if (ret != 0) {
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err = ret;
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goto errorout;
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}
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ret = RingBufferInit(&newchannel->Inbound, in, recv_ringbuffer_size);
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if (ret != 0) {
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err = ret;
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goto errorout;
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}
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/* Establish the gpadl for the ring buffer */
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DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...",
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newchannel);
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newchannel->RingBufferGpadlHandle = 0;
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ret = vmbus_establish_gpadl(newchannel,
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newchannel->Outbound.RingBuffer,
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send_ringbuffer_size +
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recv_ringbuffer_size,
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&newchannel->RingBufferGpadlHandle);
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if (ret != 0) {
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err = ret;
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goto errorout;
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}
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DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p "
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"size %d recv ring %p size %d, downstreamoffset %d>",
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newchannel, newchannel->OfferMsg.ChildRelId,
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newchannel->RingBufferGpadlHandle,
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newchannel->Outbound.RingBuffer,
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newchannel->Outbound.RingSize,
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newchannel->Inbound.RingBuffer,
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newchannel->Inbound.RingSize,
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send_ringbuffer_size);
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/* Create and init the channel open message */
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openInfo = kmalloc(sizeof(*openInfo) +
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sizeof(struct vmbus_channel_open_channel),
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GFP_KERNEL);
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if (!openInfo) {
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err = -ENOMEM;
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goto errorout;
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}
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openInfo->WaitEvent = osd_WaitEventCreate();
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if (!openInfo->WaitEvent) {
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err = -ENOMEM;
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goto errorout;
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}
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openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg;
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openMsg->Header.MessageType = ChannelMessageOpenChannel;
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openMsg->OpenId = newchannel->OfferMsg.ChildRelId; /* FIXME */
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openMsg->ChildRelId = newchannel->OfferMsg.ChildRelId;
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openMsg->RingBufferGpadlHandle = newchannel->RingBufferGpadlHandle;
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openMsg->DownstreamRingBufferPageOffset = send_ringbuffer_size >>
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PAGE_SHIFT;
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openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */
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if (userdatalen > MAX_USER_DEFINED_BYTES) {
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err = -EINVAL;
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goto errorout;
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}
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if (userdatalen)
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memcpy(openMsg->UserData, userdata, userdatalen);
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spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
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list_add_tail(&openInfo->MsgListEntry,
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&gVmbusConnection.ChannelMsgList);
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spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
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DPRINT_DBG(VMBUS, "Sending channel open msg...");
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ret = VmbusPostMessage(openMsg,
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sizeof(struct vmbus_channel_open_channel));
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if (ret != 0) {
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DPRINT_ERR(VMBUS, "unable to open channel - %d", ret);
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goto Cleanup;
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}
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/* FIXME: Need to time-out here */
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osd_WaitEventWait(openInfo->WaitEvent);
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if (openInfo->Response.OpenResult.Status == 0)
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DPRINT_INFO(VMBUS, "channel <%p> open success!!", newchannel);
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else
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DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!",
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newchannel, openInfo->Response.OpenResult.Status);
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Cleanup:
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spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
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list_del(&openInfo->MsgListEntry);
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spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
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kfree(openInfo->WaitEvent);
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kfree(openInfo);
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return 0;
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errorout:
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RingBufferCleanup(&newchannel->Outbound);
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RingBufferCleanup(&newchannel->Inbound);
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osd_PageFree(out, (send_ringbuffer_size + recv_ringbuffer_size)
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>> PAGE_SHIFT);
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kfree(openInfo);
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return err;
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}
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EXPORT_SYMBOL_GPL(vmbus_open);
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/*
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* dump_gpadl_body - Dump the gpadl body message to the console for
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* debugging purposes.
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*/
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static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len)
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{
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int i;
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int pfncount;
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pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) /
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sizeof(u64);
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DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount);
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for (i = 0; i < pfncount; i++)
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DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu",
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i, gpadl->Pfn[i]);
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}
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/*
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* dump_gpadl_header - Dump the gpadl header message to the console for
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* debugging purposes.
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*/
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static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl)
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{
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int i, j;
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int pagecount;
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DPRINT_DBG(VMBUS,
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"gpadl header - relid %d, range count %d, range buflen %d",
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gpadl->ChildRelId, gpadl->RangeCount, gpadl->RangeBufLen);
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for (i = 0; i < gpadl->RangeCount; i++) {
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pagecount = gpadl->Range[i].ByteCount >> PAGE_SHIFT;
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pagecount = (pagecount > 26) ? 26 : pagecount;
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DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d "
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"page count %d", i, gpadl->Range[i].ByteCount,
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gpadl->Range[i].ByteOffset, pagecount);
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for (j = 0; j < pagecount; j++)
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DPRINT_DBG(VMBUS, "%d) pfn %llu", j,
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gpadl->Range[i].PfnArray[j]);
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}
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}
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|
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/*
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* create_gpadl_header - Creates a gpadl for the specified buffer
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*/
|
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static int create_gpadl_header(void *kbuffer, u32 size,
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struct vmbus_channel_msginfo **msginfo,
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u32 *messagecount)
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{
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int i;
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int pagecount;
|
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unsigned long long pfn;
|
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struct vmbus_channel_gpadl_header *gpadl_header;
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struct vmbus_channel_gpadl_body *gpadl_body;
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struct vmbus_channel_msginfo *msgheader;
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struct vmbus_channel_msginfo *msgbody = NULL;
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u32 msgsize;
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int pfnsum, pfncount, pfnleft, pfncurr, pfnsize;
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/* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */
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/* ASSERT((Size & (PAGE_SIZE-1)) == 0); */
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pagecount = size >> PAGE_SHIFT;
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pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT;
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|
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/* do we need a gpadl body msg */
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pfnsize = MAX_SIZE_CHANNEL_MESSAGE -
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sizeof(struct vmbus_channel_gpadl_header) -
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sizeof(struct gpa_range);
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pfncount = pfnsize / sizeof(u64);
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if (pagecount > pfncount) {
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/* we need a gpadl body */
|
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/* fill in the header */
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msgsize = sizeof(struct vmbus_channel_msginfo) +
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sizeof(struct vmbus_channel_gpadl_header) +
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sizeof(struct gpa_range) + pfncount * sizeof(u64);
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msgheader = kzalloc(msgsize, GFP_KERNEL);
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if (!msgheader)
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goto nomem;
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INIT_LIST_HEAD(&msgheader->SubMsgList);
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msgheader->MessageSize = msgsize;
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|
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gpadl_header = (struct vmbus_channel_gpadl_header *)
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msgheader->Msg;
|
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gpadl_header->RangeCount = 1;
|
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gpadl_header->RangeBufLen = sizeof(struct gpa_range) +
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pagecount * sizeof(u64);
|
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gpadl_header->Range[0].ByteOffset = 0;
|
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gpadl_header->Range[0].ByteCount = size;
|
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for (i = 0; i < pfncount; i++)
|
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gpadl_header->Range[0].PfnArray[i] = pfn+i;
|
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*msginfo = msgheader;
|
|
*messagecount = 1;
|
|
|
|
pfnsum = pfncount;
|
|
pfnleft = pagecount - pfncount;
|
|
|
|
/* how many pfns can we fit */
|
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pfnsize = MAX_SIZE_CHANNEL_MESSAGE -
|
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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) +
|
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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)++;
|
|
gpadl_body =
|
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(struct vmbus_channel_gpadl_body *)msgbody->Msg;
|
|
|
|
/*
|
|
* FIXME:
|
|
* Gpadl is u32 and we are using a pointer which could
|
|
* be 64-bit
|
|
*/
|
|
/* gpadl_body->Gpadl = kbuffer; */
|
|
for (i = 0; i < pfncurr; i++)
|
|
gpadl_body->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);
|
|
if (msgheader == NULL)
|
|
goto nomem;
|
|
msgheader->MessageSize = msgsize;
|
|
|
|
gpadl_header = (struct vmbus_channel_gpadl_header *)
|
|
msgheader->Msg;
|
|
gpadl_header->RangeCount = 1;
|
|
gpadl_header->RangeBufLen = sizeof(struct gpa_range) +
|
|
pagecount * sizeof(u64);
|
|
gpadl_header->Range[0].ByteOffset = 0;
|
|
gpadl_header->Range[0].ByteCount = size;
|
|
for (i = 0; i < pagecount; i++)
|
|
gpadl_header->Range[0].PfnArray[i] = pfn+i;
|
|
|
|
*msginfo = msgheader;
|
|
*messagecount = 1;
|
|
}
|
|
|
|
return 0;
|
|
nomem:
|
|
kfree(msgheader);
|
|
kfree(msgbody);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* vmbus_establish_gpadl - Estabish a GPADL for the specified buffer
|
|
*
|
|
* @channel: a channel
|
|
* @kbuffer: from kmalloc
|
|
* @size: page-size multiple
|
|
* @gpadl_handle: some funky thing
|
|
*/
|
|
int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer,
|
|
u32 size, u32 *gpadl_handle)
|
|
{
|
|
struct vmbus_channel_gpadl_header *gpadlmsg;
|
|
struct vmbus_channel_gpadl_body *gpadl_body;
|
|
/* struct vmbus_channel_gpadl_created *gpadlCreated; */
|
|
struct vmbus_channel_msginfo *msginfo = NULL;
|
|
struct vmbus_channel_msginfo *submsginfo;
|
|
u32 msgcount;
|
|
struct list_head *curr;
|
|
u32 next_gpadl_handle;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
next_gpadl_handle = atomic_read(&gVmbusConnection.NextGpadlHandle);
|
|
atomic_inc(&gVmbusConnection.NextGpadlHandle);
|
|
|
|
ret = create_gpadl_header(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 = next_gpadl_handle;
|
|
|
|
dump_gpadl_header(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;
|
|
gpadl_body =
|
|
(struct vmbus_channel_gpadl_body *)submsginfo->Msg;
|
|
|
|
gpadl_body->Header.MessageType =
|
|
ChannelMessageGpadlBody;
|
|
gpadl_body->Gpadl = next_gpadl_handle;
|
|
|
|
DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd",
|
|
submsginfo->MessageSize -
|
|
sizeof(*submsginfo));
|
|
|
|
dump_gpadl_body(gpadl_body, submsginfo->MessageSize -
|
|
sizeof(*submsginfo));
|
|
ret = VmbusPostMessage(gpadl_body,
|
|
submsginfo->MessageSize -
|
|
sizeof(*submsginfo));
|
|
if (ret != 0)
|
|
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);
|
|
|
|
*gpadl_handle = 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);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(vmbus_establish_gpadl);
|
|
|
|
/*
|
|
* vmbus_teardown_gpadl -Teardown the specified GPADL handle
|
|
*/
|
|
int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
|
|
{
|
|
struct vmbus_channel_gpadl_teardown *msg;
|
|
struct vmbus_channel_msginfo *info;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
/* ASSERT(gpadl_handle != 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 = gpadl_handle;
|
|
|
|
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);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl);
|
|
|
|
/*
|
|
* vmbus_close - Close the specified channel
|
|
*/
|
|
void vmbus_close(struct vmbus_channel *channel)
|
|
{
|
|
struct vmbus_channel_close_channel *msg;
|
|
struct vmbus_channel_msginfo *info;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
/* 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)
|
|
vmbus_teardown_gpadl(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);
|
|
|
|
free_channel(channel);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(vmbus_close);
|
|
|
|
/**
|
|
* vmbus_sendpacket() - 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
|
|
* @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 vmbus_sendpacket(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 packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64));
|
|
struct scatterlist bufferlist[3];
|
|
u64 aligned_data = 0;
|
|
int ret;
|
|
|
|
DPRINT_DBG(VMBUS, "channel %p buffer %p len %d",
|
|
channel, buffer, bufferlen);
|
|
|
|
dump_vmbus_channel(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)(packetlen_aligned >> 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], &aligned_data,
|
|
packetlen_aligned - packetlen);
|
|
|
|
ret = RingBufferWrite(&channel->Outbound, bufferlist, 3);
|
|
|
|
/* TODO: We should determine if this is optional */
|
|
if (ret == 0 && !GetRingBufferInterruptMask(&channel->Outbound))
|
|
vmbus_setevent(channel);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(vmbus_sendpacket);
|
|
|
|
/*
|
|
* vmbus_sendpacket_pagebuffer - Send a range of single-page buffer
|
|
* packets using a GPADL Direct packet type.
|
|
*/
|
|
int vmbus_sendpacket_pagebuffer(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 packetlen_aligned;
|
|
struct scatterlist bufferlist[3];
|
|
u64 aligned_data = 0;
|
|
|
|
if (pagecount > MAX_PAGE_BUFFER_COUNT)
|
|
return -EINVAL;
|
|
|
|
dump_vmbus_channel(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;
|
|
packetlen_aligned = 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)(packetlen_aligned >> 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], &aligned_data,
|
|
packetlen_aligned - packetlen);
|
|
|
|
ret = RingBufferWrite(&channel->Outbound, bufferlist, 3);
|
|
|
|
/* TODO: We should determine if this is optional */
|
|
if (ret == 0 && !GetRingBufferInterruptMask(&channel->Outbound))
|
|
vmbus_setevent(channel);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer);
|
|
|
|
/*
|
|
* vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet
|
|
* using a GPADL Direct packet type.
|
|
*/
|
|
int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
|
|
struct hv_multipage_buffer *multi_pagebuffer,
|
|
void *buffer, u32 bufferlen, u64 requestid)
|
|
{
|
|
int ret;
|
|
struct vmbus_channel_packet_multipage_buffer desc;
|
|
u32 descsize;
|
|
u32 packetlen;
|
|
u32 packetlen_aligned;
|
|
struct scatterlist bufferlist[3];
|
|
u64 aligned_data = 0;
|
|
u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->Offset,
|
|
multi_pagebuffer->Length);
|
|
|
|
dump_vmbus_channel(channel);
|
|
|
|
DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u",
|
|
multi_pagebuffer->Offset,
|
|
multi_pagebuffer->Length, pfncount);
|
|
|
|
if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Adjust the size down since vmbus_channel_packet_multipage_buffer is
|
|
* the largest size we support
|
|
*/
|
|
descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) -
|
|
((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) *
|
|
sizeof(u64));
|
|
packetlen = descsize + bufferlen;
|
|
packetlen_aligned = 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)(packetlen_aligned >> 3);
|
|
desc.transactionid = requestid;
|
|
desc.rangecount = 1;
|
|
|
|
desc.range.Length = multi_pagebuffer->Length;
|
|
desc.range.Offset = multi_pagebuffer->Offset;
|
|
|
|
memcpy(desc.range.PfnArray, multi_pagebuffer->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], &aligned_data,
|
|
packetlen_aligned - packetlen);
|
|
|
|
ret = RingBufferWrite(&channel->Outbound, bufferlist, 3);
|
|
|
|
/* TODO: We should determine if this is optional */
|
|
if (ret == 0 && !GetRingBufferInterruptMask(&channel->Outbound))
|
|
vmbus_setevent(channel);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer);
|
|
|
|
/**
|
|
* vmbus_recvpacket() - 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
|
|
* @buffer_actual_len: 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 vmbus_recvpacket(struct vmbus_channel *channel, void *buffer,
|
|
u32 bufferlen, u32 *buffer_actual_len, u64 *requestid)
|
|
{
|
|
struct vmpacket_descriptor desc;
|
|
u32 packetlen;
|
|
u32 userlen;
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
*buffer_actual_len = 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!!"); */
|
|
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);
|
|
|
|
*buffer_actual_len = userlen;
|
|
|
|
if (userlen > bufferlen) {
|
|
spin_unlock_irqrestore(&channel->inbound_lock, flags);
|
|
|
|
DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d",
|
|
bufferlen, userlen);
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vmbus_recvpacket);
|
|
|
|
/*
|
|
* vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel
|
|
*/
|
|
int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer,
|
|
u32 bufferlen, u32 *buffer_actual_len,
|
|
u64 *requestid)
|
|
{
|
|
struct vmpacket_descriptor desc;
|
|
u32 packetlen;
|
|
u32 userlen;
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
*buffer_actual_len = 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!!"); */
|
|
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);
|
|
|
|
*buffer_actual_len = 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);
|
|
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);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw);
|
|
|
|
/*
|
|
* vmbus_onchannel_event - Channel event callback
|
|
*/
|
|
void vmbus_onchannel_event(struct vmbus_channel *channel)
|
|
{
|
|
dump_vmbus_channel(channel);
|
|
/* ASSERT(Channel->OnChannelCallback); */
|
|
|
|
channel->OnChannelCallback(channel->ChannelCallbackContext);
|
|
|
|
mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100));
|
|
}
|
|
|
|
/*
|
|
* vmbus_ontimer - Timer event callback
|
|
*/
|
|
void vmbus_ontimer(unsigned long data)
|
|
{
|
|
struct vmbus_channel *channel = (struct vmbus_channel *)data;
|
|
|
|
if (channel->OnChannelCallback)
|
|
channel->OnChannelCallback(channel->ChannelCallbackContext);
|
|
}
|
|
|
|
/*
|
|
* dump_vmbus_channel- Dump vmbus channel info to the console
|
|
*/
|
|
static void dump_vmbus_channel(struct vmbus_channel *channel)
|
|
{
|
|
DPRINT_DBG(VMBUS, "Channel (%d)", channel->OfferMsg.ChildRelId);
|
|
DumpRingInfo(&channel->Outbound, "Outbound ");
|
|
DumpRingInfo(&channel->Inbound, "Inbound ");
|
|
}
|