diff options
Diffstat (limited to 'drivers/staging/hv/NetVsc.c')
| -rw-r--r-- | drivers/staging/hv/NetVsc.c | 1378 |
1 files changed, 0 insertions, 1378 deletions
diff --git a/drivers/staging/hv/NetVsc.c b/drivers/staging/hv/NetVsc.c deleted file mode 100644 index 1c717f9a554..00000000000 --- a/drivers/staging/hv/NetVsc.c +++ /dev/null @@ -1,1378 +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 <haiyangz@microsoft.com> - * Hank Janssen <hjanssen@microsoft.com> - */ -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/delay.h> -#include <linux/io.h> -#include "osd.h" -#include "logging.h" -#include "NetVsc.h" -#include "RndisFilter.h" - - -/* Globals */ -static const char *gDriverName = "netvsc"; - -/* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ -static const struct hv_guid gNetVscDeviceType = { - .data = { - 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, - 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E - } -}; - -static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo); - -static int NetVscOnDeviceRemove(struct hv_device *Device); - -static void NetVscOnCleanup(struct hv_driver *Driver); - -static void NetVscOnChannelCallback(void *context); - -static int NetVscInitializeSendBufferWithNetVsp(struct hv_device *Device); - -static int NetVscInitializeReceiveBufferWithNetVsp(struct hv_device *Device); - -static int NetVscDestroySendBuffer(struct netvsc_device *NetDevice); - -static int NetVscDestroyReceiveBuffer(struct netvsc_device *NetDevice); - -static int NetVscConnectToVsp(struct hv_device *Device); - -static void NetVscOnSendCompletion(struct hv_device *Device, - struct vmpacket_descriptor *Packet); - -static int NetVscOnSend(struct hv_device *Device, - struct hv_netvsc_packet *Packet); - -static void NetVscOnReceive(struct hv_device *Device, - struct vmpacket_descriptor *Packet); - -static void NetVscOnReceiveCompletion(void *Context); - -static void NetVscSendReceiveCompletion(struct hv_device *Device, - u64 TransactionId); - - -static struct netvsc_device *AllocNetDevice(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - - netDevice = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); - if (!netDevice) - return NULL; - - /* Set to 2 to allow both inbound and outbound traffic */ - atomic_cmpxchg(&netDevice->RefCount, 0, 2); - - netDevice->Device = Device; - Device->Extension = netDevice; - - return netDevice; -} - -static void FreeNetDevice(struct netvsc_device *Device) -{ - ASSERT(atomic_read(&Device->RefCount) == 0); - Device->Device->Extension = NULL; - kfree(Device); -} - - -/* Get the net device object iff exists and its refcount > 1 */ -static struct netvsc_device *GetOutboundNetDevice(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - - netDevice = Device->Extension; - if (netDevice && atomic_read(&netDevice->RefCount) > 1) - atomic_inc(&netDevice->RefCount); - else - netDevice = NULL; - - return netDevice; -} - -/* Get the net device object iff exists and its refcount > 0 */ -static struct netvsc_device *GetInboundNetDevice(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - - netDevice = Device->Extension; - if (netDevice && atomic_read(&netDevice->RefCount)) - atomic_inc(&netDevice->RefCount); - else - netDevice = NULL; - - return netDevice; -} - -static void PutNetDevice(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - - netDevice = Device->Extension; - ASSERT(netDevice); - - atomic_dec(&netDevice->RefCount); -} - -static struct netvsc_device *ReleaseOutboundNetDevice(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - - netDevice = Device->Extension; - if (netDevice == NULL) - return NULL; - - /* Busy wait until the ref drop to 2, then set it to 1 */ - while (atomic_cmpxchg(&netDevice->RefCount, 2, 1) != 2) - udelay(100); - - return netDevice; -} - -static struct netvsc_device *ReleaseInboundNetDevice(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - - netDevice = Device->Extension; - if (netDevice == NULL) - return NULL; - - /* Busy wait until the ref drop to 1, then set it to 0 */ - while (atomic_cmpxchg(&netDevice->RefCount, 1, 0) != 1) - udelay(100); - - Device->Extension = NULL; - return netDevice; -} - -/** - * NetVscInitialize - Main entry point - */ -int NetVscInitialize(struct hv_driver *drv) -{ - struct netvsc_driver *driver = (struct netvsc_driver *)drv; - - DPRINT_ENTER(NETVSC); - - DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, " - "sizeof(struct nvsp_message)=%zd, " - "sizeof(struct vmtransfer_page_packet_header)=%zd", - sizeof(struct hv_netvsc_packet), - sizeof(struct nvsp_message), - sizeof(struct vmtransfer_page_packet_header)); - - /* Make sure we are at least 2 pages since 1 page is used for control */ - ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); - - drv->name = gDriverName; - memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(struct hv_guid)); - - /* Make sure it is set by the caller */ - ASSERT(driver->OnReceiveCallback); - ASSERT(driver->OnLinkStatusChanged); - - /* Setup the dispatch table */ - driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; - driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; - driver->Base.OnCleanup = NetVscOnCleanup; - - driver->OnSend = NetVscOnSend; - - RndisFilterInit(driver); - - DPRINT_EXIT(NETVSC); - - return 0; -} - -static int NetVscInitializeReceiveBufferWithNetVsp(struct hv_device *Device) -{ - int ret = 0; - struct netvsc_device *netDevice; - struct nvsp_message *initPacket; - - DPRINT_ENTER(NETVSC); - - netDevice = GetOutboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - DPRINT_EXIT(NETVSC); - return -1; - } - ASSERT(netDevice->ReceiveBufferSize > 0); - /* page-size grandularity */ - ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE - 1)) == 0); - - netDevice->ReceiveBuffer = - osd_PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); - if (!netDevice->ReceiveBuffer) { - DPRINT_ERR(NETVSC, - "unable to allocate receive buffer of size %d", - netDevice->ReceiveBufferSize); - ret = -1; - goto Cleanup; - } - /* page-aligned buffer */ - ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE - 1)) == - 0); - - DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); - - /* - * Establish the gpadl handle for this buffer on this - * channel. Note: This call uses the vmbus connection rather - * than the channel to establish the gpadl handle. - */ - ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, - netDevice->ReceiveBuffer, - netDevice->ReceiveBufferSize, - &netDevice->ReceiveBufferGpadlHandle); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to establish receive buffer's gpadl"); - goto Cleanup; - } - - /* osd_WaitEventWait(ext->ChannelInitEvent); */ - - /* Notify the NetVsp of the gpadl handle */ - DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); - - initPacket = &netDevice->ChannelInitPacket; - - memset(initPacket, 0, sizeof(struct nvsp_message)); - - initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; - initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; - initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; - - /* Send the gpadl notification request */ - ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, - initPacket, - sizeof(struct nvsp_message), - (unsigned long)initPacket, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to send receive buffer's gpadl to netvsp"); - goto Cleanup; - } - - osd_WaitEventWait(netDevice->ChannelInitEvent); - - /* Check the response */ - if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) { - DPRINT_ERR(NETVSC, "Unable to complete receive buffer " - "initialzation with NetVsp - status %d", - initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); - ret = -1; - goto Cleanup; - } - - /* Parse the response */ - ASSERT(netDevice->ReceiveSectionCount == 0); - ASSERT(netDevice->ReceiveSections == NULL); - - netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; - - netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); - if (netDevice->ReceiveSections == NULL) { - ret = -1; - goto Cleanup; - } - - memcpy(netDevice->ReceiveSections, - initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, - netDevice->ReceiveSectionCount * sizeof(struct nvsp_1_receive_buffer_section)); - - DPRINT_INFO(NETVSC, "Receive sections info (count %d, offset %d, " - "endoffset %d, suballoc size %d, num suballocs %d)", - netDevice->ReceiveSectionCount, - netDevice->ReceiveSections[0].Offset, - netDevice->ReceiveSections[0].EndOffset, - netDevice->ReceiveSections[0].SubAllocationSize, - netDevice->ReceiveSections[0].NumSubAllocations); - - /* - * For 1st release, there should only be 1 section that represents the - * entire receive buffer - */ - if (netDevice->ReceiveSectionCount != 1 || - netDevice->ReceiveSections->Offset != 0) { - ret = -1; - goto Cleanup; - } - - goto Exit; - -Cleanup: - NetVscDestroyReceiveBuffer(netDevice); - -Exit: - PutNetDevice(Device); - DPRINT_EXIT(NETVSC); - return ret; -} - -static int NetVscInitializeSendBufferWithNetVsp(struct hv_device *Device) -{ - int ret = 0; - struct netvsc_device *netDevice; - struct nvsp_message *initPacket; - - DPRINT_ENTER(NETVSC); - - netDevice = GetOutboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - DPRINT_EXIT(NETVSC); - return -1; - } - ASSERT(netDevice->SendBufferSize > 0); - /* page-size grandularity */ - ASSERT((netDevice->SendBufferSize & (PAGE_SIZE - 1)) == 0); - - netDevice->SendBuffer = - osd_PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); - if (!netDevice->SendBuffer) { - DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", - netDevice->SendBufferSize); - ret = -1; - goto Cleanup; - } - /* page-aligned buffer */ - ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE - 1)) == 0); - - DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); - - /* - * Establish the gpadl handle for this buffer on this - * channel. Note: This call uses the vmbus connection rather - * than the channel to establish the gpadl handle. - */ - ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, - netDevice->SendBuffer, - netDevice->SendBufferSize, - &netDevice->SendBufferGpadlHandle); - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); - goto Cleanup; - } - - /* osd_WaitEventWait(ext->ChannelInitEvent); */ - - /* Notify the NetVsp of the gpadl handle */ - DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); - - initPacket = &netDevice->ChannelInitPacket; - - memset(initPacket, 0, sizeof(struct nvsp_message)); - - initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; - initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; - initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; - - /* Send the gpadl notification request */ - ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, - initPacket, sizeof(struct nvsp_message), - (unsigned long)initPacket, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to send receive buffer's gpadl to netvsp"); - goto Cleanup; - } - - osd_WaitEventWait(netDevice->ChannelInitEvent); - - /* Check the response */ - if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) { - DPRINT_ERR(NETVSC, "Unable to complete send buffer " - "initialzation with NetVsp - status %d", - initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); - ret = -1; - goto Cleanup; - } - - netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; - - goto Exit; - -Cleanup: - NetVscDestroySendBuffer(netDevice); - -Exit: - PutNetDevice(Device); - DPRINT_EXIT(NETVSC); - return ret; -} - -static int NetVscDestroyReceiveBuffer(struct netvsc_device *NetDevice) -{ - struct nvsp_message *revokePacket; - int ret = 0; - - DPRINT_ENTER(NETVSC); - - /* - * If we got a section count, it means we received a - * SendReceiveBufferComplete msg (ie sent - * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need - * to send a revoke msg here - */ - if (NetDevice->ReceiveSectionCount) { - DPRINT_INFO(NETVSC, - "Sending NvspMessage1TypeRevokeReceiveBuffer..."); - - /* Send the revoke receive buffer */ - revokePacket = &NetDevice->RevokePacket; - memset(revokePacket, 0, sizeof(struct nvsp_message)); - - revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; - revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; - - ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket( - NetDevice->Device, - revokePacket, - sizeof(struct nvsp_message), - (unsigned long)revokePacket, - VmbusPacketTypeDataInBand, 0); - /* - * If we failed here, we might as well return and - * have a leak rather than continue and a bugchk - */ - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to send revoke receive " - "buffer to netvsp"); - DPRINT_EXIT(NETVSC); - return -1; - } - } - - /* Teardown the gpadl on the vsp end */ - if (NetDevice->ReceiveBufferGpadlHandle) { - DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); - - ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl( - NetDevice->Device, - NetDevice->ReceiveBufferGpadlHandle); - - /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to teardown receive buffer's gpadl"); - DPRINT_EXIT(NETVSC); - return -1; - } - NetDevice->ReceiveBufferGpadlHandle = 0; - } - - if (NetDevice->ReceiveBuffer) { - DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); - - /* Free up the receive buffer */ - osd_PageFree(NetDevice->ReceiveBuffer, - NetDevice->ReceiveBufferSize >> PAGE_SHIFT); - NetDevice->ReceiveBuffer = NULL; - } - - if (NetDevice->ReceiveSections) { - NetDevice->ReceiveSectionCount = 0; - kfree(NetDevice->ReceiveSections); - NetDevice->ReceiveSections = NULL; - } - - DPRINT_EXIT(NETVSC); - - return ret; -} - -static int NetVscDestroySendBuffer(struct netvsc_device *NetDevice) -{ - struct nvsp_message *revokePacket; - int ret = 0; - - DPRINT_ENTER(NETVSC); - - /* - * If we got a section count, it means we received a - * SendReceiveBufferComplete msg (ie sent - * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need - * to send a revoke msg here - */ - if (NetDevice->SendSectionSize) { - DPRINT_INFO(NETVSC, - "Sending NvspMessage1TypeRevokeSendBuffer..."); - - /* Send the revoke send buffer */ - revokePacket = &NetDevice->RevokePacket; - memset(revokePacket, 0, sizeof(struct nvsp_message)); - - revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; - revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; - - ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, - revokePacket, - sizeof(struct nvsp_message), - (unsigned long)revokePacket, - VmbusPacketTypeDataInBand, 0); - /* - * If we failed here, we might as well return and have a leak - * rather than continue and a bugchk - */ - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to send revoke send buffer " - "to netvsp"); - DPRINT_EXIT(NETVSC); - return -1; - } - } - - /* Teardown the gpadl on the vsp end */ - if (NetDevice->SendBufferGpadlHandle) { - DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); - - ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, NetDevice->SendBufferGpadlHandle); - - /* - * If we failed here, we might as well return and have a leak - * rather than continue and a bugchk - */ - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to teardown send buffer's " - "gpadl"); - DPRINT_EXIT(NETVSC); - return -1; - } - NetDevice->SendBufferGpadlHandle = 0; - } - - if (NetDevice->SendBuffer) { - DPRINT_INFO(NETVSC, "Freeing up send buffer..."); - - /* Free up the receive buffer */ - osd_PageFree(NetDevice->SendBuffer, - NetDevice->SendBufferSize >> PAGE_SHIFT); - NetDevice->SendBuffer = NULL; - } - - DPRINT_EXIT(NETVSC); - - return ret; -} - - -static int NetVscConnectToVsp(struct hv_device *Device) -{ - int ret; - struct netvsc_device *netDevice; - struct nvsp_message *initPacket; - int ndisVersion; - - DPRINT_ENTER(NETVSC); - - netDevice = GetOutboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - DPRINT_EXIT(NETVSC); - return -1; - } - - initPacket = &netDevice->ChannelInitPacket; - - memset(initPacket, 0, sizeof(struct nvsp_message)); - initPacket->Header.MessageType = NvspMessageTypeInit; - initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; - initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; - - DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); - - /* Send the init request */ - ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, - initPacket, - sizeof(struct nvsp_message), - (unsigned long)initPacket, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); - goto Cleanup; - } - - osd_WaitEventWait(netDevice->ChannelInitEvent); - - /* Now, check the response */ - /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ - DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", - initPacket->Messages.InitMessages.InitComplete.Status, - initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); - - if (initPacket->Messages.InitMessages.InitComplete.Status != - NvspStatusSuccess) { - DPRINT_ERR(NETVSC, - "unable to initialize with netvsp (status 0x%x)", - initPacket->Messages.InitMessages.InitComplete.Status); - ret = -1; - goto Cleanup; - } - - if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) { - DPRINT_ERR(NETVSC, "unable to initialize with netvsp " - "(version expected 1 got %d)", - initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); - ret = -1; - goto Cleanup; - } - DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); - - /* Send the ndis version */ - memset(initPacket, 0, sizeof(struct nvsp_message)); - - ndisVersion = 0x00050000; - - initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; - initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = - (ndisVersion & 0xFFFF0000) >> 16; - initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = - ndisVersion & 0xFFFF; - - /* Send the init request */ - ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, - initPacket, - sizeof(struct nvsp_message), - (unsigned long)initPacket, - VmbusPacketTypeDataInBand, 0); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to send NvspMessage1TypeSendNdisVersion"); - ret = -1; - goto Cleanup; - } - /* - * BUGBUG - We have to wait for the above msg since the - * netvsp uses KMCL which acknowledges packet (completion - * packet) since our Vmbus always set the - * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag - */ - /* osd_WaitEventWait(NetVscChannel->ChannelInitEvent); */ - - /* Post the big receive buffer to NetVSP */ - ret = NetVscInitializeReceiveBufferWithNetVsp(Device); - if (ret == 0) - ret = NetVscInitializeSendBufferWithNetVsp(Device); - -Cleanup: - PutNetDevice(Device); - DPRINT_EXIT(NETVSC); - return ret; -} - -static void NetVscDisconnectFromVsp(struct netvsc_device *NetDevice) -{ - DPRINT_ENTER(NETVSC); - - NetVscDestroyReceiveBuffer(NetDevice); - NetVscDestroySendBuffer(NetDevice); - - DPRINT_EXIT(NETVSC); -} - -/** - * NetVscOnDeviceAdd - Callback when the device belonging to this driver is added - */ -static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo) -{ - int ret = 0; - int i; - struct netvsc_device *netDevice; - struct hv_netvsc_packet *packet, *pos; - struct netvsc_driver *netDriver = - (struct netvsc_driver *)Device->Driver; - - DPRINT_ENTER(NETVSC); - - netDevice = AllocNetDevice(Device); - if (!netDevice) { - ret = -1; - goto Cleanup; - } - - DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); - - /* Initialize the NetVSC channel extension */ - netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; - spin_lock_init(&netDevice->receive_packet_list_lock); - - netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; - - INIT_LIST_HEAD(&netDevice->ReceivePacketList); - - for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { - packet = kzalloc(sizeof(struct hv_netvsc_packet) + - (NETVSC_RECEIVE_SG_COUNT * - sizeof(struct hv_page_buffer)), GFP_KERNEL); - if (!packet) { - DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts " - "for receive pool (wanted %d got %d)", - NETVSC_RECEIVE_PACKETLIST_COUNT, i); - break; - } - list_add_tail(&packet->ListEntry, - &netDevice->ReceivePacketList); - } - netDevice->ChannelInitEvent = osd_WaitEventCreate(); - - /* Open the channel */ - ret = Device->Driver->VmbusChannelInterface.Open(Device, - netDriver->RingBufferSize, - netDriver->RingBufferSize, - NULL, 0, - NetVscOnChannelCallback, - Device); - - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); - ret = -1; - goto Cleanup; - } - - /* Channel is opened */ - DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); - - /* Connect with the NetVsp */ - ret = NetVscConnectToVsp(Device); - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); - ret = -1; - goto Close; - } - - DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", - ret); - - DPRINT_EXIT(NETVSC); - return ret; - -Close: - /* Now, we can close the channel safely */ - Device->Driver->VmbusChannelInterface.Close(Device); - -Cleanup: - - if (netDevice) { - kfree(netDevice->ChannelInitEvent); - - list_for_each_entry_safe(packet, pos, - &netDevice->ReceivePacketList, - ListEntry) { - list_del(&packet->ListEntry); - kfree(packet); - } - - ReleaseOutboundNetDevice(Device); - ReleaseInboundNetDevice(Device); - - FreeNetDevice(netDevice); - } - - DPRINT_EXIT(NETVSC); - return ret; -} - -/** - * NetVscOnDeviceRemove - Callback when the root bus device is removed - */ -static int NetVscOnDeviceRemove(struct hv_device *Device) -{ - struct netvsc_device *netDevice; - struct hv_netvsc_packet *netvscPacket, *pos; - - DPRINT_ENTER(NETVSC); - - DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", - Device->Extension); - - /* Stop outbound traffic ie sends and receives completions */ - netDevice = ReleaseOutboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "No net device present!!"); - return -1; - } - - /* Wait for all send completions */ - while (atomic_read(&netDevice->NumOutstandingSends)) { - DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", - atomic_read(&netDevice->NumOutstandingSends)); - udelay(100); - } - - DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); - - NetVscDisconnectFromVsp(netDevice); - - DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", - Device->Extension); - - /* Stop inbound traffic ie receives and sends completions */ - netDevice = ReleaseInboundNetDevice(Device); - - /* At this point, no one should be accessing netDevice except in here */ - DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); - - /* Now, we can close the channel safely */ - Device->Driver->VmbusChannelInterface.Close(Device); - - /* Release all resources */ - list_for_each_entry_safe(netvscPacket, pos, - &netDevice->ReceivePacketList, ListEntry) { - list_del(&netvscPacket->ListEntry); - kfree(netvscPacket); - } - - kfree(netDevice->ChannelInitEvent); - FreeNetDevice(netDevice); - - DPRINT_EXIT(NETVSC); - return 0; -} - -/** - * NetVscOnCleanup - Perform any cleanup when the driver is removed - */ -static void NetVscOnCleanup(struct hv_driver *drv) -{ - DPRINT_ENTER(NETVSC); - DPRINT_EXIT(NETVSC); -} - -static void NetVscOnSendCompletion(struct hv_device *Device, - struct vmpacket_descriptor *Packet) -{ - struct netvsc_device *netDevice; - struct nvsp_message *nvspPacket; - struct hv_netvsc_packet *nvscPacket; - - DPRINT_ENTER(NETVSC); - - netDevice = GetInboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - DPRINT_EXIT(NETVSC); - return; - } - - nvspPacket = (struct nvsp_message *)((unsigned long)Packet + (Packet->DataOffset8 << 3)); - - DPRINT_DBG(NETVSC, "send completion packet - type %d", - nvspPacket->Header.MessageType); - - if ((nvspPacket->Header.MessageType == NvspMessageTypeInitComplete) || - (nvspPacket->Header.MessageType == - NvspMessage1TypeSendReceiveBufferComplete) || - (nvspPacket->Header.MessageType == - NvspMessage1TypeSendSendBufferComplete)) { - /* Copy the response back */ - memcpy(&netDevice->ChannelInitPacket, nvspPacket, - sizeof(struct nvsp_message)); - osd_WaitEventSet(netDevice->ChannelInitEvent); - } else if (nvspPacket->Header.MessageType == - NvspMessage1TypeSendRNDISPacketComplete) { - /* Get the send context */ - nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId; - ASSERT(nvscPacket); - - /* Notify the layer above us */ - nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); - - atomic_dec(&netDevice->NumOutstandingSends); - } else { - DPRINT_ERR(NETVSC, "Unknown send completion packet type - " - "%d received!!", nvspPacket->Header.MessageType); - } - - PutNetDevice(Device); - DPRINT_EXIT(NETVSC); -} - -static int NetVscOnSend(struct hv_device *Device, - struct hv_netvsc_packet *Packet) -{ - struct netvsc_device *netDevice; - int ret = 0; - - struct nvsp_message sendMessage; - - DPRINT_ENTER(NETVSC); - - netDevice = GetOutboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "net device (%p) shutting down..." - "ignoring outbound packets", netDevice); - DPRINT_EXIT(NETVSC); - return -2; - } - - sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; - if (Packet->IsDataPacket) { - /* 0 is RMC_DATA; */ - sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0; - } else { - /* 1 is RMC_CONTROL; */ - sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1; - } - - /* Not using send buffer section */ - sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; - sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; - - if (Packet->PageBufferCount) { - ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer( - Device, Packet->PageBuffers, - Packet->PageBufferCount, - &sendMessage, - sizeof(struct nvsp_message), - (unsigned long)Packet); - } else { - ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, - &sendMessage, - sizeof(struct nvsp_message), - (unsigned long)Packet, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - - } - - if (ret != 0) - DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", - Packet, ret); - - atomic_inc(&netDevice->NumOutstandingSends); - PutNetDevice(Device); - - DPRINT_EXIT(NETVSC); - return ret; -} - -static void NetVscOnReceive(struct hv_device *Device, - struct vmpacket_descriptor *Packet) -{ - struct netvsc_device *netDevice; - struct vmtransfer_page_packet_header *vmxferpagePacket; - struct nvsp_message *nvspPacket; - struct hv_netvsc_packet *netvscPacket = NULL; - unsigned long start; - unsigned long end, endVirtual; - /* struct netvsc_driver *netvscDriver; */ - struct xferpage_packet *xferpagePacket = NULL; - int i, j; - int count = 0, bytesRemain = 0; - unsigned long flags; - LIST_HEAD(listHead); - - DPRINT_ENTER(NETVSC); - - netDevice = GetInboundNetDevice(Device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - DPRINT_EXIT(NETVSC); - return; - } - - /* - * All inbound packets other than send completion should be xfer page - * packet - */ - if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) { - DPRINT_ERR(NETVSC, "Unknown packet type received - %d", - Packet->Type); - PutNetDevice(Device); - return; - } - - nvspPacket = (struct nvsp_message *)((unsigned long)Packet + - (Packet->DataOffset8 << 3)); - - /* Make sure this is a valid nvsp packet */ - if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket) { - DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", - nvspPacket->Header.MessageType); - PutNetDevice(Device); - return; - } - - DPRINT_DBG(NETVSC, "NVSP packet received - type %d", - nvspPacket->Header.MessageType); - - vmxferpagePacket = (struct vmtransfer_page_packet_header *)Packet; - - if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) { - DPRINT_ERR(NETVSC, "Invalid xfer page set id - " - "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, - vmxferpagePacket->TransferPageSetId); - PutNetDevice(Device); - return; - } - - DPRINT_DBG(NETVSC, "xfer page - range count %d", - vmxferpagePacket->RangeCount); - - /* - * Grab free packets (range count + 1) to represent this xfer - * page packet. +1 to represent the xfer page packet itself. - * We grab it here so that we know exactly how many we can - * fulfil - */ - spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); - while (!list_empty(&netDevice->ReceivePacketList)) { - list_move_tail(netDevice->ReceivePacketList.next, &listHead); - if (++count == vmxferpagePacket->RangeCount + 1) - break; - } - spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); - - /* - * We need at least 2 netvsc pkts (1 to represent the xfer - * page and at least 1 for the range) i.e. we can handled - * some of the xfer page packet ranges... - */ - if (count < 2) { - DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. " - "Dropping this xfer page packet completely!", - count, vmxferpagePacket->RangeCount + 1); - - /* Return it to the freelist */ - spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); - for (i = count; i != 0; i--) { - list_move_tail(listHead.next, - &netDevice->ReceivePacketList); - } - spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, - flags); - - NetVscSendReceiveCompletion(Device, - vmxferpagePacket->d.TransactionId); - - PutNetDevice(Device); - return; - } - - /* Remove the 1st packet to represent the xfer page packet itself */ - xferpagePacket = (struct xferpage_packet*)listHead.next; - list_del(&xferpagePacket->ListEntry); - - /* This is how much we can satisfy */ - xferpagePacket->Count = count - 1; - ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= - vmxferpagePacket->RangeCount); - - if (xferpagePacket->Count != vmxferpagePacket->RangeCount) { - DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer " - "page...got %d", vmxferpagePacket->RangeCount, - xferpagePacket->Count); - } - - /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ - for (i = 0; i < (count - 1); i++) { - netvscPacket = (struct hv_netvsc_packet*)listHead.next; - list_del(&netvscPacket->ListEntry); - - /* Initialize the netvsc packet */ - netvscPacket->XferPagePacket = xferpagePacket; - netvscPacket->Completion.Recv.OnReceiveCompletion = - NetVscOnReceiveCompletion; - netvscPacket->Completion.Recv.ReceiveCompletionContext = - netvscPacket; - netvscPacket->Device = Device; - /* Save this so that we can send it back */ - netvscPacket->Completion.Recv.ReceiveCompletionTid = - vmxferpagePacket->d.TransactionId; - - netvscPacket->TotalDataBufferLength = - vmxferpagePacket->Ranges[i].ByteCount; - netvscPacket->PageBufferCount = 1; - - ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + - vmxferpagePacket->Ranges[i].ByteCount < - netDevice->ReceiveBufferSize); - - netvscPacket->PageBuffers[0].Length = - vmxferpagePacket->Ranges[i].ByteCount; - - start = virt_to_phys((void *)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); - - netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; - endVirtual = (unsigned long)netDevice->ReceiveBuffer - + vmxferpagePacket->Ranges[i].ByteOffset - + vmxferpagePacket->Ranges[i].ByteCount - 1; - end = virt_to_phys((void *)endVirtual); - - /* Calculate the page relative offset */ - netvscPacket->PageBuffers[0].Offset = - vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE - 1); - if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { - /* Handle frame across multiple pages: */ - netvscPacket->PageBuffers[0].Length = - (netvscPacket->PageBuffers[0].Pfn << PAGE_SHIFT) - + PAGE_SIZE - start; - bytesRemain = netvscPacket->TotalDataBufferLength - - netvscPacket->PageBuffers[0].Length; - for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { - netvscPacket->PageBuffers[j].Offset = 0; - if (bytesRemain <= PAGE_SIZE) { - netvscPacket->PageBuffers[j].Length = bytesRemain; - bytesRemain = 0; - } else { - netvscPacket->PageBuffers[j].Length = PAGE_SIZE; - bytesRemain -= PAGE_SIZE; - } - netvscPacket->PageBuffers[j].Pfn = - virt_to_phys((void *)(endVirtual - bytesRemain)) >> PAGE_SHIFT; - netvscPacket->PageBufferCount++; - if (bytesRemain == 0) - break; - } - ASSERT(bytesRemain == 0); - } - DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => " - "(pfn %llx, offset %u, len %u)", i, - vmxferpagePacket->Ranges[i].ByteOffset, - vmxferpagePacket->Ranges[i].ByteCount, - netvscPacket->PageBuffers[0].Pfn, - netvscPacket->PageBuffers[0].Offset, - netvscPacket->PageBuffers[0].Length); - - /* Pass it to the upper layer */ - ((struct netvsc_driver *)Device->Driver)->OnReceiveCallback(Device, netvscPacket); - - NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); - } - - ASSERT(list_empty(&listHead)); - - PutNetDevice(Device); - DPRINT_EXIT(NETVSC); -} - -static void NetVscSendReceiveCompletion(struct hv_device *Device, - u64 TransactionId) -{ - struct nvsp_message recvcompMessage; - int retries = 0; - int ret; - - DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", - TransactionId); - - recvcompMessage.Header.MessageType = - NvspMessage1TypeSendRNDISPacketComplete; - - /* FIXME: Pass in the status */ - recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; - -retry_send_cmplt: - /* Send the completion */ - ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, - &recvcompMessage, - sizeof(struct nvsp_message), - TransactionId, - VmbusPacketTypeCompletion, 0); - if (ret == 0) { - /* success */ - /* no-op */ - } else if (ret == -1) { - /* no more room...wait a bit and attempt to retry 3 times */ - retries++; - DPRINT_ERR(NETVSC, "unable to send receive completion pkt " - "(tid %llx)...retrying %d", TransactionId, retries); - - if (retries < 4) { - udelay(100); - goto retry_send_cmplt; - } else { - DPRINT_ERR(NETVSC, "unable to send receive completion " - "pkt (tid %llx)...give up retrying", - TransactionId); - } - } else { - DPRINT_ERR(NETVSC, "unable to send receive completion pkt - " - "%llx", TransactionId); - } -} - -/* Send a receive completion packet to RNDIS device (ie NetVsp) */ -static void NetVscOnReceiveCompletion(void *Context) -{ - struct hv_netvsc_packet *packet = Context; - struct hv_device *device = (struct hv_device *)packet->Device; - struct netvsc_device *netDevice; - u64 transactionId = 0; - bool fSendReceiveComp = false; - unsigned long flags; - - DPRINT_ENTER(NETVSC); - - ASSERT(packet->XferPagePacket); - - /* - * Even though it seems logical to do a GetOutboundNetDevice() here to - * send out receive completion, we are using GetInboundNetDevice() - * since we may have disable outbound traffic already. - */ - netDevice = GetInboundNetDevice(device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - DPRINT_EXIT(NETVSC); - return; - } - - /* Overloading use of the lock. */ - spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); - - ASSERT(packet->XferPagePacket->Count > 0); - packet->XferPagePacket->Count--; - - /* - * Last one in the line that represent 1 xfer page packet. - * Return the xfer page packet itself to the freelist - */ - if (packet->XferPagePacket->Count == 0) { - fSendReceiveComp = true; - transactionId = packet->Completion.Recv.ReceiveCompletionTid; - list_add_tail(&packet->XferPagePacket->ListEntry, - &netDevice->ReceivePacketList); - - } - - /* Put the packet back */ - list_add_tail(&packet->ListEntry, &netDevice->ReceivePacketList); - spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); - - /* Send a receive completion for the xfer page packet */ - if (fSendReceiveComp) - NetVscSendReceiveCompletion(device, transactionId); - - PutNetDevice(device); - DPRINT_EXIT(NETVSC); -} - -void NetVscOnChannelCallback(void *Context) -{ - const int netPacketSize = 2048; - int ret; - struct hv_device *device = Context; - struct netvsc_device *netDevice; - u32 bytesRecvd; - u64 requestId; - unsigned char packet[netPacketSize]; - struct vmpacket_descriptor *desc; - unsigned char *buffer = packet; - int bufferlen = netPacketSize; - - - DPRINT_ENTER(NETVSC); - - ASSERT(device); - - netDevice = GetInboundNetDevice(device); - if (!netDevice) { - DPRINT_ERR(NETVSC, "net device (%p) shutting down..." - "ignoring inbound packets", netDevice); - DPRINT_EXIT(NETVSC); - return; - } - - do { - ret = device->Driver->VmbusChannelInterface.RecvPacketRaw( - device, buffer, bufferlen, - &bytesRecvd, &requestId); - if (ret == 0) { - if (bytesRecvd > 0) { - DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", - bytesRecvd, requestId); - - desc = (struct vmpacket_descriptor *)buffer; - switch (desc->Type) { - case VmbusPacketTypeCompletion: - NetVscOnSendCompletion(device, desc); - break; - - case VmbusPacketTypeDataUsingTransferPages: - NetVscOnReceive(device, desc); - break; - - default: - DPRINT_ERR(NETVSC, - "unhandled packet type %d, " - "tid %llx len %d\n", - desc->Type, requestId, - bytesRecvd); - break; - } - - /* reset */ - if (bufferlen > netPacketSize) { - kfree(buffer); - buffer = packet; - bufferlen = netPacketSize; - } - } else { - /* reset */ - if (bufferlen > netPacketSize) { - kfree(buffer); - buffer = packet; - bufferlen = netPacketSize; - } - - break; - } - } else if (ret == -2) { - /* Handle large packet */ - buffer = kmalloc(bytesRecvd, GFP_ATOMIC); - if (buffer == NULL) { - /* Try again next time around */ - DPRINT_ERR(NETVSC, - "unable to allocate buffer of size " - "(%d)!!", bytesRecvd); - break; - } - - bufferlen = bytesRecvd; - } else { - ASSERT(0); - } - } while (1); - - PutNetDevice(device); - DPRINT_EXIT(NETVSC); - return; -} |