From: Greg Kroah-Hartman Date: Thu, 6 May 2010 05:19:40 +0000 (-0700) Subject: Staging: hv: rename Connection.c to connection.c X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=55e9643e6c486b589279576877838ffd8ed04a68;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git Staging: hv: rename Connection.c to connection.c Cc: Hank Janssen Cc: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/hv/Connection.c b/drivers/staging/hv/Connection.c deleted file mode 100644 index 3a01d3ca4ad..00000000000 --- a/drivers/staging/hv/Connection.c +++ /dev/null @@ -1,349 +0,0 @@ -/* - * - * 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 - * Hank Janssen - * - */ -#include -#include -#include -#include -#include "osd.h" -#include "logging.h" -#include "VmbusPrivate.h" - - -struct VMBUS_CONNECTION gVmbusConnection = { - .ConnectState = Disconnected, - .NextGpadlHandle = ATOMIC_INIT(0xE1E10), -}; - -/* - * VmbusConnect - Sends a connect request on the partition service connection - */ -int VmbusConnect(void) -{ - int ret = 0; - struct vmbus_channel_msginfo *msgInfo = NULL; - struct vmbus_channel_initiate_contact *msg; - unsigned long flags; - - DPRINT_ENTER(VMBUS); - - /* Make sure we are not connecting or connected */ - if (gVmbusConnection.ConnectState != Disconnected) - return -1; - - /* Initialize the vmbus connection */ - gVmbusConnection.ConnectState = Connecting; - gVmbusConnection.WorkQueue = create_workqueue("hv_vmbus_con"); - if (!gVmbusConnection.WorkQueue) { - ret = -1; - goto Cleanup; - } - - INIT_LIST_HEAD(&gVmbusConnection.ChannelMsgList); - spin_lock_init(&gVmbusConnection.channelmsg_lock); - - INIT_LIST_HEAD(&gVmbusConnection.ChannelList); - spin_lock_init(&gVmbusConnection.channel_lock); - - /* - * Setup the vmbus event connection for channel interrupt - * abstraction stuff - */ - gVmbusConnection.InterruptPage = osd_PageAlloc(1); - if (gVmbusConnection.InterruptPage == NULL) { - ret = -1; - goto Cleanup; - } - - gVmbusConnection.RecvInterruptPage = gVmbusConnection.InterruptPage; - gVmbusConnection.SendInterruptPage = - (void *)((unsigned long)gVmbusConnection.InterruptPage + - (PAGE_SIZE >> 1)); - - /* - * Setup the monitor notification facility. The 1st page for - * parent->child and the 2nd page for child->parent - */ - gVmbusConnection.MonitorPages = osd_PageAlloc(2); - if (gVmbusConnection.MonitorPages == NULL) { - ret = -1; - goto Cleanup; - } - - msgInfo = kzalloc(sizeof(*msgInfo) + - sizeof(struct vmbus_channel_initiate_contact), - GFP_KERNEL); - if (msgInfo == NULL) { - ret = -ENOMEM; - goto Cleanup; - } - - msgInfo->WaitEvent = osd_WaitEventCreate(); - if (!msgInfo->WaitEvent) { - ret = -ENOMEM; - goto Cleanup; - } - - msg = (struct vmbus_channel_initiate_contact *)msgInfo->Msg; - - msg->Header.MessageType = ChannelMessageInitiateContact; - msg->VMBusVersionRequested = VMBUS_REVISION_NUMBER; - msg->InterruptPage = virt_to_phys(gVmbusConnection.InterruptPage); - msg->MonitorPage1 = virt_to_phys(gVmbusConnection.MonitorPages); - msg->MonitorPage2 = virt_to_phys( - (void *)((unsigned long)gVmbusConnection.MonitorPages + - PAGE_SIZE)); - - /* - * Add to list before we send the request since we may - * receive the response before returning from this routine - */ - spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); - list_add_tail(&msgInfo->MsgListEntry, - &gVmbusConnection.ChannelMsgList); - - spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); - - DPRINT_DBG(VMBUS, "Vmbus connection - interrupt pfn %llx, " - "monitor1 pfn %llx,, monitor2 pfn %llx", - msg->InterruptPage, msg->MonitorPage1, msg->MonitorPage2); - - DPRINT_DBG(VMBUS, "Sending channel initiate msg..."); - ret = VmbusPostMessage(msg, - sizeof(struct vmbus_channel_initiate_contact)); - if (ret != 0) { - list_del(&msgInfo->MsgListEntry); - goto Cleanup; - } - - /* Wait for the connection response */ - osd_WaitEventWait(msgInfo->WaitEvent); - - list_del(&msgInfo->MsgListEntry); - - /* Check if successful */ - if (msgInfo->Response.VersionResponse.VersionSupported) { - DPRINT_INFO(VMBUS, "Vmbus connected!!"); - gVmbusConnection.ConnectState = Connected; - - } else { - DPRINT_ERR(VMBUS, "Vmbus connection failed!!..." - "current version (%d) not supported", - VMBUS_REVISION_NUMBER); - ret = -1; - goto Cleanup; - } - - kfree(msgInfo->WaitEvent); - kfree(msgInfo); - DPRINT_EXIT(VMBUS); - - return 0; - -Cleanup: - gVmbusConnection.ConnectState = Disconnected; - - if (gVmbusConnection.WorkQueue) - destroy_workqueue(gVmbusConnection.WorkQueue); - - if (gVmbusConnection.InterruptPage) { - osd_PageFree(gVmbusConnection.InterruptPage, 1); - gVmbusConnection.InterruptPage = NULL; - } - - if (gVmbusConnection.MonitorPages) { - osd_PageFree(gVmbusConnection.MonitorPages, 2); - gVmbusConnection.MonitorPages = NULL; - } - - if (msgInfo) { - kfree(msgInfo->WaitEvent); - kfree(msgInfo); - } - - DPRINT_EXIT(VMBUS); - - return ret; -} - -/* - * VmbusDisconnect - Sends a disconnect request on the partition service connection - */ -int VmbusDisconnect(void) -{ - int ret = 0; - struct vmbus_channel_message_header *msg; - - DPRINT_ENTER(VMBUS); - - /* Make sure we are connected */ - if (gVmbusConnection.ConnectState != Connected) - return -1; - - msg = kzalloc(sizeof(struct vmbus_channel_message_header), GFP_KERNEL); - if (!msg) - return -ENOMEM; - - msg->MessageType = ChannelMessageUnload; - - ret = VmbusPostMessage(msg, - sizeof(struct vmbus_channel_message_header)); - if (ret != 0) - goto Cleanup; - - osd_PageFree(gVmbusConnection.InterruptPage, 1); - - /* TODO: iterate thru the msg list and free up */ - destroy_workqueue(gVmbusConnection.WorkQueue); - - gVmbusConnection.ConnectState = Disconnected; - - DPRINT_INFO(VMBUS, "Vmbus disconnected!!"); - -Cleanup: - kfree(msg); - DPRINT_EXIT(VMBUS); - return ret; -} - -/* - * GetChannelFromRelId - Get the channel object given its child relative id (ie channel id) - */ -struct vmbus_channel *GetChannelFromRelId(u32 relId) -{ - struct vmbus_channel *channel; - struct vmbus_channel *foundChannel = NULL; - unsigned long flags; - - spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); - list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) { - if (channel->OfferMsg.ChildRelId == relId) { - foundChannel = channel; - break; - } - } - spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); - - return foundChannel; -} - -/* - * VmbusProcessChannelEvent - Process a channel event notification - */ -static void VmbusProcessChannelEvent(void *context) -{ - struct vmbus_channel *channel; - u32 relId = (u32)(unsigned long)context; - - /* ASSERT(relId > 0); */ - - /* - * Find the channel based on this relid and invokes the - * channel callback to process the event - */ - channel = GetChannelFromRelId(relId); - - if (channel) { - VmbusChannelOnChannelEvent(channel); - /* - * WorkQueueQueueWorkItem(channel->dataWorkQueue, - * VmbusChannelOnChannelEvent, - * (void*)channel); - */ - } else { - DPRINT_ERR(VMBUS, "channel not found for relid - %d.", relId); - } -} - -/* - * VmbusOnEvents - Handler for events - */ -void VmbusOnEvents(void) -{ - int dword; - int maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5; - int bit; - int relid; - u32 *recvInterruptPage = gVmbusConnection.RecvInterruptPage; - - DPRINT_ENTER(VMBUS); - - /* Check events */ - if (recvInterruptPage) { - for (dword = 0; dword < maxdword; dword++) { - if (recvInterruptPage[dword]) { - for (bit = 0; bit < 32; bit++) { - if (test_and_clear_bit(bit, (unsigned long *)&recvInterruptPage[dword])) { - relid = (dword << 5) + bit; - DPRINT_DBG(VMBUS, "event detected for relid - %d", relid); - - if (relid == 0) { - /* special case - vmbus channel protocol msg */ - DPRINT_DBG(VMBUS, "invalid relid - %d", relid); - continue; - } else { - /* QueueWorkItem(VmbusProcessEvent, (void*)relid); */ - /* ret = WorkQueueQueueWorkItem(gVmbusConnection.workQueue, VmbusProcessChannelEvent, (void*)relid); */ - VmbusProcessChannelEvent((void *)(unsigned long)relid); - } - } - } - } - } - } - DPRINT_EXIT(VMBUS); - - return; -} - -/* - * VmbusPostMessage - Send a msg on the vmbus's message connection - */ -int VmbusPostMessage(void *buffer, size_t bufferLen) -{ - union hv_connection_id connId; - - connId.Asu32 = 0; - connId.u.Id = VMBUS_MESSAGE_CONNECTION_ID; - return HvPostMessage(connId, 1, buffer, bufferLen); -} - -/* - * VmbusSetEvent - Send an event notification to the parent - */ -int VmbusSetEvent(u32 childRelId) -{ - int ret = 0; - - DPRINT_ENTER(VMBUS); - - /* Each u32 represents 32 channels */ - set_bit(childRelId & 31, - (unsigned long *)gVmbusConnection.SendInterruptPage + - (childRelId >> 5)); - - ret = HvSignalEvent(); - - DPRINT_EXIT(VMBUS); - - return ret; -} diff --git a/drivers/staging/hv/Makefile b/drivers/staging/hv/Makefile index 3c15c731f96..91955095f9e 100644 --- a/drivers/staging/hv/Makefile +++ b/drivers/staging/hv/Makefile @@ -5,7 +5,7 @@ obj-$(CONFIG_HYPERV_NET) += hv_netvsc.o obj-$(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 diff --git a/drivers/staging/hv/connection.c b/drivers/staging/hv/connection.c new file mode 100644 index 00000000000..3a01d3ca4ad --- /dev/null +++ b/drivers/staging/hv/connection.c @@ -0,0 +1,349 @@ +/* + * + * 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 + * Hank Janssen + * + */ +#include +#include +#include +#include +#include "osd.h" +#include "logging.h" +#include "VmbusPrivate.h" + + +struct VMBUS_CONNECTION gVmbusConnection = { + .ConnectState = Disconnected, + .NextGpadlHandle = ATOMIC_INIT(0xE1E10), +}; + +/* + * VmbusConnect - Sends a connect request on the partition service connection + */ +int VmbusConnect(void) +{ + int ret = 0; + struct vmbus_channel_msginfo *msgInfo = NULL; + struct vmbus_channel_initiate_contact *msg; + unsigned long flags; + + DPRINT_ENTER(VMBUS); + + /* Make sure we are not connecting or connected */ + if (gVmbusConnection.ConnectState != Disconnected) + return -1; + + /* Initialize the vmbus connection */ + gVmbusConnection.ConnectState = Connecting; + gVmbusConnection.WorkQueue = create_workqueue("hv_vmbus_con"); + if (!gVmbusConnection.WorkQueue) { + ret = -1; + goto Cleanup; + } + + INIT_LIST_HEAD(&gVmbusConnection.ChannelMsgList); + spin_lock_init(&gVmbusConnection.channelmsg_lock); + + INIT_LIST_HEAD(&gVmbusConnection.ChannelList); + spin_lock_init(&gVmbusConnection.channel_lock); + + /* + * Setup the vmbus event connection for channel interrupt + * abstraction stuff + */ + gVmbusConnection.InterruptPage = osd_PageAlloc(1); + if (gVmbusConnection.InterruptPage == NULL) { + ret = -1; + goto Cleanup; + } + + gVmbusConnection.RecvInterruptPage = gVmbusConnection.InterruptPage; + gVmbusConnection.SendInterruptPage = + (void *)((unsigned long)gVmbusConnection.InterruptPage + + (PAGE_SIZE >> 1)); + + /* + * Setup the monitor notification facility. The 1st page for + * parent->child and the 2nd page for child->parent + */ + gVmbusConnection.MonitorPages = osd_PageAlloc(2); + if (gVmbusConnection.MonitorPages == NULL) { + ret = -1; + goto Cleanup; + } + + msgInfo = kzalloc(sizeof(*msgInfo) + + sizeof(struct vmbus_channel_initiate_contact), + GFP_KERNEL); + if (msgInfo == NULL) { + ret = -ENOMEM; + goto Cleanup; + } + + msgInfo->WaitEvent = osd_WaitEventCreate(); + if (!msgInfo->WaitEvent) { + ret = -ENOMEM; + goto Cleanup; + } + + msg = (struct vmbus_channel_initiate_contact *)msgInfo->Msg; + + msg->Header.MessageType = ChannelMessageInitiateContact; + msg->VMBusVersionRequested = VMBUS_REVISION_NUMBER; + msg->InterruptPage = virt_to_phys(gVmbusConnection.InterruptPage); + msg->MonitorPage1 = virt_to_phys(gVmbusConnection.MonitorPages); + msg->MonitorPage2 = virt_to_phys( + (void *)((unsigned long)gVmbusConnection.MonitorPages + + PAGE_SIZE)); + + /* + * Add to list before we send the request since we may + * receive the response before returning from this routine + */ + spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); + list_add_tail(&msgInfo->MsgListEntry, + &gVmbusConnection.ChannelMsgList); + + spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); + + DPRINT_DBG(VMBUS, "Vmbus connection - interrupt pfn %llx, " + "monitor1 pfn %llx,, monitor2 pfn %llx", + msg->InterruptPage, msg->MonitorPage1, msg->MonitorPage2); + + DPRINT_DBG(VMBUS, "Sending channel initiate msg..."); + ret = VmbusPostMessage(msg, + sizeof(struct vmbus_channel_initiate_contact)); + if (ret != 0) { + list_del(&msgInfo->MsgListEntry); + goto Cleanup; + } + + /* Wait for the connection response */ + osd_WaitEventWait(msgInfo->WaitEvent); + + list_del(&msgInfo->MsgListEntry); + + /* Check if successful */ + if (msgInfo->Response.VersionResponse.VersionSupported) { + DPRINT_INFO(VMBUS, "Vmbus connected!!"); + gVmbusConnection.ConnectState = Connected; + + } else { + DPRINT_ERR(VMBUS, "Vmbus connection failed!!..." + "current version (%d) not supported", + VMBUS_REVISION_NUMBER); + ret = -1; + goto Cleanup; + } + + kfree(msgInfo->WaitEvent); + kfree(msgInfo); + DPRINT_EXIT(VMBUS); + + return 0; + +Cleanup: + gVmbusConnection.ConnectState = Disconnected; + + if (gVmbusConnection.WorkQueue) + destroy_workqueue(gVmbusConnection.WorkQueue); + + if (gVmbusConnection.InterruptPage) { + osd_PageFree(gVmbusConnection.InterruptPage, 1); + gVmbusConnection.InterruptPage = NULL; + } + + if (gVmbusConnection.MonitorPages) { + osd_PageFree(gVmbusConnection.MonitorPages, 2); + gVmbusConnection.MonitorPages = NULL; + } + + if (msgInfo) { + kfree(msgInfo->WaitEvent); + kfree(msgInfo); + } + + DPRINT_EXIT(VMBUS); + + return ret; +} + +/* + * VmbusDisconnect - Sends a disconnect request on the partition service connection + */ +int VmbusDisconnect(void) +{ + int ret = 0; + struct vmbus_channel_message_header *msg; + + DPRINT_ENTER(VMBUS); + + /* Make sure we are connected */ + if (gVmbusConnection.ConnectState != Connected) + return -1; + + msg = kzalloc(sizeof(struct vmbus_channel_message_header), GFP_KERNEL); + if (!msg) + return -ENOMEM; + + msg->MessageType = ChannelMessageUnload; + + ret = VmbusPostMessage(msg, + sizeof(struct vmbus_channel_message_header)); + if (ret != 0) + goto Cleanup; + + osd_PageFree(gVmbusConnection.InterruptPage, 1); + + /* TODO: iterate thru the msg list and free up */ + destroy_workqueue(gVmbusConnection.WorkQueue); + + gVmbusConnection.ConnectState = Disconnected; + + DPRINT_INFO(VMBUS, "Vmbus disconnected!!"); + +Cleanup: + kfree(msg); + DPRINT_EXIT(VMBUS); + return ret; +} + +/* + * GetChannelFromRelId - Get the channel object given its child relative id (ie channel id) + */ +struct vmbus_channel *GetChannelFromRelId(u32 relId) +{ + struct vmbus_channel *channel; + struct vmbus_channel *foundChannel = NULL; + unsigned long flags; + + spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); + list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) { + if (channel->OfferMsg.ChildRelId == relId) { + foundChannel = channel; + break; + } + } + spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); + + return foundChannel; +} + +/* + * VmbusProcessChannelEvent - Process a channel event notification + */ +static void VmbusProcessChannelEvent(void *context) +{ + struct vmbus_channel *channel; + u32 relId = (u32)(unsigned long)context; + + /* ASSERT(relId > 0); */ + + /* + * Find the channel based on this relid and invokes the + * channel callback to process the event + */ + channel = GetChannelFromRelId(relId); + + if (channel) { + VmbusChannelOnChannelEvent(channel); + /* + * WorkQueueQueueWorkItem(channel->dataWorkQueue, + * VmbusChannelOnChannelEvent, + * (void*)channel); + */ + } else { + DPRINT_ERR(VMBUS, "channel not found for relid - %d.", relId); + } +} + +/* + * VmbusOnEvents - Handler for events + */ +void VmbusOnEvents(void) +{ + int dword; + int maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5; + int bit; + int relid; + u32 *recvInterruptPage = gVmbusConnection.RecvInterruptPage; + + DPRINT_ENTER(VMBUS); + + /* Check events */ + if (recvInterruptPage) { + for (dword = 0; dword < maxdword; dword++) { + if (recvInterruptPage[dword]) { + for (bit = 0; bit < 32; bit++) { + if (test_and_clear_bit(bit, (unsigned long *)&recvInterruptPage[dword])) { + relid = (dword << 5) + bit; + DPRINT_DBG(VMBUS, "event detected for relid - %d", relid); + + if (relid == 0) { + /* special case - vmbus channel protocol msg */ + DPRINT_DBG(VMBUS, "invalid relid - %d", relid); + continue; + } else { + /* QueueWorkItem(VmbusProcessEvent, (void*)relid); */ + /* ret = WorkQueueQueueWorkItem(gVmbusConnection.workQueue, VmbusProcessChannelEvent, (void*)relid); */ + VmbusProcessChannelEvent((void *)(unsigned long)relid); + } + } + } + } + } + } + DPRINT_EXIT(VMBUS); + + return; +} + +/* + * VmbusPostMessage - Send a msg on the vmbus's message connection + */ +int VmbusPostMessage(void *buffer, size_t bufferLen) +{ + union hv_connection_id connId; + + connId.Asu32 = 0; + connId.u.Id = VMBUS_MESSAGE_CONNECTION_ID; + return HvPostMessage(connId, 1, buffer, bufferLen); +} + +/* + * VmbusSetEvent - Send an event notification to the parent + */ +int VmbusSetEvent(u32 childRelId) +{ + int ret = 0; + + DPRINT_ENTER(VMBUS); + + /* Each u32 represents 32 channels */ + set_bit(childRelId & 31, + (unsigned long *)gVmbusConnection.SendInterruptPage + + (childRelId >> 5)); + + ret = HvSignalEvent(); + + DPRINT_EXIT(VMBUS); + + return ret; +}