ChannelMgmt.o ChannelInterface.o ring_buffer.o
hv_storvsc-objs := storvsc_drv.o StorVsc.o
hv_blkvsc-objs := blkvsc_drv.o blkvsc.o
-hv_netvsc-objs := netvsc_drv.o NetVsc.o RndisFilter.o
+hv_netvsc-objs := netvsc_drv.o netvsc.o RndisFilter.o
+++ /dev/null
-/*
- * Copyright (c) 2009, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.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)
-{
- WARN_ON(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 */
- /* FIXME: These probably should still be tested in some way */
- /* 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;
- }
- if (netDevice->SendBufferSize <= 0) {
- ret = -EINVAL;
- goto Cleanup;
- }
-
- /* 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();
- if (!netDevice->ChannelInitEvent) {
- ret = -ENOMEM;
- goto Cleanup;
- }
-
- /* 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);
-}
-
-static void NetVscOnChannelCallback(void *Context)
-{
- int ret;
- struct hv_device *device = Context;
- struct netvsc_device *netDevice;
- u32 bytesRecvd;
- u64 requestId;
- unsigned char *packet;
- struct vmpacket_descriptor *desc;
- unsigned char *buffer;
- int bufferlen = NETVSC_PACKET_SIZE;
-
-
- DPRINT_ENTER(NETVSC);
-
- /* ASSERT(device); */
-
- packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
- GFP_KERNEL);
- if (!packet)
- return;
- buffer = packet;
-
- netDevice = GetInboundNetDevice(device);
- if (!netDevice) {
- DPRINT_ERR(NETVSC, "net device (%p) shutting down..."
- "ignoring inbound packets", netDevice);
- DPRINT_EXIT(NETVSC);
- goto out;
- }
-
- 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 > NETVSC_PACKET_SIZE) {
- kfree(buffer);
- buffer = packet;
- bufferlen = NETVSC_PACKET_SIZE;
- }
- } else {
- /* reset */
- if (bufferlen > NETVSC_PACKET_SIZE) {
- kfree(buffer);
- buffer = packet;
- bufferlen = NETVSC_PACKET_SIZE;
- }
-
- 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;
- }
- } while (1);
-
- PutNetDevice(device);
- DPRINT_EXIT(NETVSC);
-out:
- kfree(buffer);
- return;
-}
+++ /dev/null
-/*
- *
- * Copyright (c) 2009, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- *
- */
-
-
-#ifndef _NETVSC_H_
-#define _NETVSC_H_
-
-#include <linux/list.h>
-#include "VmbusPacketFormat.h"
-#include "VmbusChannelInterface.h"
-#include "NetVscApi.h"
-
-
-#define NVSP_INVALID_PROTOCOL_VERSION ((u32)0xFFFFFFFF)
-
-#define NVSP_PROTOCOL_VERSION_1 2
-#define NVSP_MIN_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
-#define NVSP_MAX_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
-
-enum {
- NvspMessageTypeNone = 0,
-
- /* Init Messages */
- NvspMessageTypeInit = 1,
- NvspMessageTypeInitComplete = 2,
-
- NvspVersionMessageStart = 100,
-
- /* Version 1 Messages */
- NvspMessage1TypeSendNdisVersion = NvspVersionMessageStart,
-
- NvspMessage1TypeSendReceiveBuffer,
- NvspMessage1TypeSendReceiveBufferComplete,
- NvspMessage1TypeRevokeReceiveBuffer,
-
- NvspMessage1TypeSendSendBuffer,
- NvspMessage1TypeSendSendBufferComplete,
- NvspMessage1TypeRevokeSendBuffer,
-
- NvspMessage1TypeSendRNDISPacket,
- NvspMessage1TypeSendRNDISPacketComplete,
-
- /*
- * This should be set to the number of messages for the version with
- * the maximum number of messages.
- */
- NvspNumMessagePerVersion = 9,
-};
-
-enum {
- NvspStatusNone = 0,
- NvspStatusSuccess,
- NvspStatusFailure,
- NvspStatusProtocolVersionRangeTooNew,
- NvspStatusProtocolVersionRangeTooOld,
- NvspStatusInvalidRndisPacket,
- NvspStatusBusy,
- NvspStatusMax,
-};
-
-struct nvsp_message_header {
- u32 MessageType;
-};
-
-/* Init Messages */
-
-/*
- * This message is used by the VSC to initialize the channel after the channels
- * has been opened. This message should never include anything other then
- * versioning (i.e. this message will be the same for ever).
- */
-struct nvsp_message_init {
- u32 MinProtocolVersion;
- u32 MaxProtocolVersion;
-} __attribute__((packed));
-
-/*
- * This message is used by the VSP to complete the initialization of the
- * channel. This message should never include anything other then versioning
- * (i.e. this message will be the same for ever).
- */
-struct nvsp_message_init_complete {
- u32 NegotiatedProtocolVersion;
- u32 MaximumMdlChainLength;
- u32 Status;
-} __attribute__((packed));
-
-union nvsp_message_init_uber {
- struct nvsp_message_init Init;
- struct nvsp_message_init_complete InitComplete;
-} __attribute__((packed));
-
-/* Version 1 Messages */
-
-/*
- * This message is used by the VSC to send the NDIS version to the VSP. The VSP
- * can use this information when handling OIDs sent by the VSC.
- */
-struct nvsp_1_message_send_ndis_version {
- u32 NdisMajorVersion;
- u32 NdisMinorVersion;
-} __attribute__((packed));
-
-/*
- * This message is used by the VSC to send a receive buffer to the VSP. The VSP
- * can then use the receive buffer to send data to the VSC.
- */
-struct nvsp_1_message_send_receive_buffer {
- u32 GpadlHandle;
- u16 Id;
-} __attribute__((packed));
-
-struct nvsp_1_receive_buffer_section {
- u32 Offset;
- u32 SubAllocationSize;
- u32 NumSubAllocations;
- u32 EndOffset;
-} __attribute__((packed));
-
-/*
- * This message is used by the VSP to acknowledge a receive buffer send by the
- * VSC. This message must be sent by the VSP before the VSP uses the receive
- * buffer.
- */
-struct nvsp_1_message_send_receive_buffer_complete {
- u32 Status;
- u32 NumSections;
-
- /*
- * The receive buffer is split into two parts, a large suballocation
- * section and a small suballocation section. These sections are then
- * suballocated by a certain size.
- */
-
- /*
- * For example, the following break up of the receive buffer has 6
- * large suballocations and 10 small suballocations.
- */
-
- /*
- * | Large Section | | Small Section |
- * ------------------------------------------------------------
- * | | | | | | | | | | | | | | | | | |
- * | |
- * LargeOffset SmallOffset
- */
-
- struct nvsp_1_receive_buffer_section Sections[1];
-} __attribute__((packed));
-
-/*
- * This message is sent by the VSC to revoke the receive buffer. After the VSP
- * completes this transaction, the vsp should never use the receive buffer
- * again.
- */
-struct nvsp_1_message_revoke_receive_buffer {
- u16 Id;
-};
-
-/*
- * This message is used by the VSC to send a send buffer to the VSP. The VSC
- * can then use the send buffer to send data to the VSP.
- */
-struct nvsp_1_message_send_send_buffer {
- u32 GpadlHandle;
- u16 Id;
-} __attribute__((packed));
-
-/*
- * This message is used by the VSP to acknowledge a send buffer sent by the
- * VSC. This message must be sent by the VSP before the VSP uses the sent
- * buffer.
- */
-struct nvsp_1_message_send_send_buffer_complete {
- u32 Status;
-
- /*
- * The VSC gets to choose the size of the send buffer and the VSP gets
- * to choose the sections size of the buffer. This was done to enable
- * dynamic reconfigurations when the cost of GPA-direct buffers
- * decreases.
- */
- u32 SectionSize;
-} __attribute__((packed));
-
-/*
- * This message is sent by the VSC to revoke the send buffer. After the VSP
- * completes this transaction, the vsp should never use the send buffer again.
- */
-struct nvsp_1_message_revoke_send_buffer {
- u16 Id;
-};
-
-/*
- * This message is used by both the VSP and the VSC to send a RNDIS message to
- * the opposite channel endpoint.
- */
-struct nvsp_1_message_send_rndis_packet {
- /*
- * This field is specified by RNIDS. They assume there's two different
- * channels of communication. However, the Network VSP only has one.
- * Therefore, the channel travels with the RNDIS packet.
- */
- u32 ChannelType;
-
- /*
- * This field is used to send part or all of the data through a send
- * buffer. This values specifies an index into the send buffer. If the
- * index is 0xFFFFFFFF, then the send buffer is not being used and all
- * of the data was sent through other VMBus mechanisms.
- */
- u32 SendBufferSectionIndex;
- u32 SendBufferSectionSize;
-} __attribute__((packed));
-
-/*
- * This message is used by both the VSP and the VSC to complete a RNDIS message
- * to the opposite channel endpoint. At this point, the initiator of this
- * message cannot use any resources associated with the original RNDIS packet.
- */
-struct nvsp_1_message_send_rndis_packet_complete {
- u32 Status;
-};
-
-union nvsp_1_message_uber {
- struct nvsp_1_message_send_ndis_version SendNdisVersion;
-
- struct nvsp_1_message_send_receive_buffer SendReceiveBuffer;
- struct nvsp_1_message_send_receive_buffer_complete
- SendReceiveBufferComplete;
- struct nvsp_1_message_revoke_receive_buffer RevokeReceiveBuffer;
-
- struct nvsp_1_message_send_send_buffer SendSendBuffer;
- struct nvsp_1_message_send_send_buffer_complete SendSendBufferComplete;
- struct nvsp_1_message_revoke_send_buffer RevokeSendBuffer;
-
- struct nvsp_1_message_send_rndis_packet SendRNDISPacket;
- struct nvsp_1_message_send_rndis_packet_complete
- SendRNDISPacketComplete;
-} __attribute__((packed));
-
-union nvsp_all_messages {
- union nvsp_message_init_uber InitMessages;
- union nvsp_1_message_uber Version1Messages;
-} __attribute__((packed));
-
-/* ALL Messages */
-struct nvsp_message {
- struct nvsp_message_header Header;
- union nvsp_all_messages Messages;
-} __attribute__((packed));
-
-
-
-
-/* #define NVSC_MIN_PROTOCOL_VERSION 1 */
-/* #define NVSC_MAX_PROTOCOL_VERSION 1 */
-
-#define NETVSC_SEND_BUFFER_SIZE (64*1024) /* 64K */
-#define NETVSC_SEND_BUFFER_ID 0xface
-
-
-#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024) /* 1MB */
-
-#define NETVSC_RECEIVE_BUFFER_ID 0xcafe
-
-#define NETVSC_RECEIVE_SG_COUNT 1
-
-/* Preallocated receive packets */
-#define NETVSC_RECEIVE_PACKETLIST_COUNT 256
-
-#define NETVSC_PACKET_SIZE 2048
-
-/* Per netvsc channel-specific */
-struct netvsc_device {
- struct hv_device *Device;
-
- atomic_t RefCount;
- atomic_t NumOutstandingSends;
- /*
- * List of free preallocated hv_netvsc_packet to represent receive
- * packet
- */
- struct list_head ReceivePacketList;
- spinlock_t receive_packet_list_lock;
-
- /* Send buffer allocated by us but manages by NetVSP */
- void *SendBuffer;
- u32 SendBufferSize;
- u32 SendBufferGpadlHandle;
- u32 SendSectionSize;
-
- /* Receive buffer allocated by us but manages by NetVSP */
- void *ReceiveBuffer;
- u32 ReceiveBufferSize;
- u32 ReceiveBufferGpadlHandle;
- u32 ReceiveSectionCount;
- struct nvsp_1_receive_buffer_section *ReceiveSections;
-
- /* Used for NetVSP initialization protocol */
- struct osd_waitevent *ChannelInitEvent;
- struct nvsp_message ChannelInitPacket;
-
- struct nvsp_message RevokePacket;
- /* unsigned char HwMacAddr[HW_MACADDR_LEN]; */
-
- /* Holds rndis device info */
- void *Extension;
-};
-
-#endif /* _NETVSC_H_ */
#define __struct_bcount(x)
-#include "NetVsc.h"
+#include "netvsc.h"
#include "rndis.h"
--- /dev/null
+/*
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.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)
+{
+ WARN_ON(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 */
+ /* FIXME: These probably should still be tested in some way */
+ /* 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;
+ }
+ if (netDevice->SendBufferSize <= 0) {
+ ret = -EINVAL;
+ goto Cleanup;
+ }
+
+ /* 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();
+ if (!netDevice->ChannelInitEvent) {
+ ret = -ENOMEM;
+ goto Cleanup;
+ }
+
+ /* 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);
+}
+
+static void NetVscOnChannelCallback(void *Context)
+{
+ int ret;
+ struct hv_device *device = Context;
+ struct netvsc_device *netDevice;
+ u32 bytesRecvd;
+ u64 requestId;
+ unsigned char *packet;
+ struct vmpacket_descriptor *desc;
+ unsigned char *buffer;
+ int bufferlen = NETVSC_PACKET_SIZE;
+
+
+ DPRINT_ENTER(NETVSC);
+
+ /* ASSERT(device); */
+
+ packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
+ GFP_KERNEL);
+ if (!packet)
+ return;
+ buffer = packet;
+
+ netDevice = GetInboundNetDevice(device);
+ if (!netDevice) {
+ DPRINT_ERR(NETVSC, "net device (%p) shutting down..."
+ "ignoring inbound packets", netDevice);
+ DPRINT_EXIT(NETVSC);
+ goto out;
+ }
+
+ 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 > NETVSC_PACKET_SIZE) {
+ kfree(buffer);
+ buffer = packet;
+ bufferlen = NETVSC_PACKET_SIZE;
+ }
+ } else {
+ /* reset */
+ if (bufferlen > NETVSC_PACKET_SIZE) {
+ kfree(buffer);
+ buffer = packet;
+ bufferlen = NETVSC_PACKET_SIZE;
+ }
+
+ 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;
+ }
+ } while (1);
+
+ PutNetDevice(device);
+ DPRINT_EXIT(NETVSC);
+out:
+ kfree(buffer);
+ return;
+}
--- /dev/null
+/*
+ *
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ *
+ */
+
+
+#ifndef _NETVSC_H_
+#define _NETVSC_H_
+
+#include <linux/list.h>
+#include "VmbusPacketFormat.h"
+#include "VmbusChannelInterface.h"
+#include "NetVscApi.h"
+
+
+#define NVSP_INVALID_PROTOCOL_VERSION ((u32)0xFFFFFFFF)
+
+#define NVSP_PROTOCOL_VERSION_1 2
+#define NVSP_MIN_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
+#define NVSP_MAX_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
+
+enum {
+ NvspMessageTypeNone = 0,
+
+ /* Init Messages */
+ NvspMessageTypeInit = 1,
+ NvspMessageTypeInitComplete = 2,
+
+ NvspVersionMessageStart = 100,
+
+ /* Version 1 Messages */
+ NvspMessage1TypeSendNdisVersion = NvspVersionMessageStart,
+
+ NvspMessage1TypeSendReceiveBuffer,
+ NvspMessage1TypeSendReceiveBufferComplete,
+ NvspMessage1TypeRevokeReceiveBuffer,
+
+ NvspMessage1TypeSendSendBuffer,
+ NvspMessage1TypeSendSendBufferComplete,
+ NvspMessage1TypeRevokeSendBuffer,
+
+ NvspMessage1TypeSendRNDISPacket,
+ NvspMessage1TypeSendRNDISPacketComplete,
+
+ /*
+ * This should be set to the number of messages for the version with
+ * the maximum number of messages.
+ */
+ NvspNumMessagePerVersion = 9,
+};
+
+enum {
+ NvspStatusNone = 0,
+ NvspStatusSuccess,
+ NvspStatusFailure,
+ NvspStatusProtocolVersionRangeTooNew,
+ NvspStatusProtocolVersionRangeTooOld,
+ NvspStatusInvalidRndisPacket,
+ NvspStatusBusy,
+ NvspStatusMax,
+};
+
+struct nvsp_message_header {
+ u32 MessageType;
+};
+
+/* Init Messages */
+
+/*
+ * This message is used by the VSC to initialize the channel after the channels
+ * has been opened. This message should never include anything other then
+ * versioning (i.e. this message will be the same for ever).
+ */
+struct nvsp_message_init {
+ u32 MinProtocolVersion;
+ u32 MaxProtocolVersion;
+} __attribute__((packed));
+
+/*
+ * This message is used by the VSP to complete the initialization of the
+ * channel. This message should never include anything other then versioning
+ * (i.e. this message will be the same for ever).
+ */
+struct nvsp_message_init_complete {
+ u32 NegotiatedProtocolVersion;
+ u32 MaximumMdlChainLength;
+ u32 Status;
+} __attribute__((packed));
+
+union nvsp_message_init_uber {
+ struct nvsp_message_init Init;
+ struct nvsp_message_init_complete InitComplete;
+} __attribute__((packed));
+
+/* Version 1 Messages */
+
+/*
+ * This message is used by the VSC to send the NDIS version to the VSP. The VSP
+ * can use this information when handling OIDs sent by the VSC.
+ */
+struct nvsp_1_message_send_ndis_version {
+ u32 NdisMajorVersion;
+ u32 NdisMinorVersion;
+} __attribute__((packed));
+
+/*
+ * This message is used by the VSC to send a receive buffer to the VSP. The VSP
+ * can then use the receive buffer to send data to the VSC.
+ */
+struct nvsp_1_message_send_receive_buffer {
+ u32 GpadlHandle;
+ u16 Id;
+} __attribute__((packed));
+
+struct nvsp_1_receive_buffer_section {
+ u32 Offset;
+ u32 SubAllocationSize;
+ u32 NumSubAllocations;
+ u32 EndOffset;
+} __attribute__((packed));
+
+/*
+ * This message is used by the VSP to acknowledge a receive buffer send by the
+ * VSC. This message must be sent by the VSP before the VSP uses the receive
+ * buffer.
+ */
+struct nvsp_1_message_send_receive_buffer_complete {
+ u32 Status;
+ u32 NumSections;
+
+ /*
+ * The receive buffer is split into two parts, a large suballocation
+ * section and a small suballocation section. These sections are then
+ * suballocated by a certain size.
+ */
+
+ /*
+ * For example, the following break up of the receive buffer has 6
+ * large suballocations and 10 small suballocations.
+ */
+
+ /*
+ * | Large Section | | Small Section |
+ * ------------------------------------------------------------
+ * | | | | | | | | | | | | | | | | | |
+ * | |
+ * LargeOffset SmallOffset
+ */
+
+ struct nvsp_1_receive_buffer_section Sections[1];
+} __attribute__((packed));
+
+/*
+ * This message is sent by the VSC to revoke the receive buffer. After the VSP
+ * completes this transaction, the vsp should never use the receive buffer
+ * again.
+ */
+struct nvsp_1_message_revoke_receive_buffer {
+ u16 Id;
+};
+
+/*
+ * This message is used by the VSC to send a send buffer to the VSP. The VSC
+ * can then use the send buffer to send data to the VSP.
+ */
+struct nvsp_1_message_send_send_buffer {
+ u32 GpadlHandle;
+ u16 Id;
+} __attribute__((packed));
+
+/*
+ * This message is used by the VSP to acknowledge a send buffer sent by the
+ * VSC. This message must be sent by the VSP before the VSP uses the sent
+ * buffer.
+ */
+struct nvsp_1_message_send_send_buffer_complete {
+ u32 Status;
+
+ /*
+ * The VSC gets to choose the size of the send buffer and the VSP gets
+ * to choose the sections size of the buffer. This was done to enable
+ * dynamic reconfigurations when the cost of GPA-direct buffers
+ * decreases.
+ */
+ u32 SectionSize;
+} __attribute__((packed));
+
+/*
+ * This message is sent by the VSC to revoke the send buffer. After the VSP
+ * completes this transaction, the vsp should never use the send buffer again.
+ */
+struct nvsp_1_message_revoke_send_buffer {
+ u16 Id;
+};
+
+/*
+ * This message is used by both the VSP and the VSC to send a RNDIS message to
+ * the opposite channel endpoint.
+ */
+struct nvsp_1_message_send_rndis_packet {
+ /*
+ * This field is specified by RNIDS. They assume there's two different
+ * channels of communication. However, the Network VSP only has one.
+ * Therefore, the channel travels with the RNDIS packet.
+ */
+ u32 ChannelType;
+
+ /*
+ * This field is used to send part or all of the data through a send
+ * buffer. This values specifies an index into the send buffer. If the
+ * index is 0xFFFFFFFF, then the send buffer is not being used and all
+ * of the data was sent through other VMBus mechanisms.
+ */
+ u32 SendBufferSectionIndex;
+ u32 SendBufferSectionSize;
+} __attribute__((packed));
+
+/*
+ * This message is used by both the VSP and the VSC to complete a RNDIS message
+ * to the opposite channel endpoint. At this point, the initiator of this
+ * message cannot use any resources associated with the original RNDIS packet.
+ */
+struct nvsp_1_message_send_rndis_packet_complete {
+ u32 Status;
+};
+
+union nvsp_1_message_uber {
+ struct nvsp_1_message_send_ndis_version SendNdisVersion;
+
+ struct nvsp_1_message_send_receive_buffer SendReceiveBuffer;
+ struct nvsp_1_message_send_receive_buffer_complete
+ SendReceiveBufferComplete;
+ struct nvsp_1_message_revoke_receive_buffer RevokeReceiveBuffer;
+
+ struct nvsp_1_message_send_send_buffer SendSendBuffer;
+ struct nvsp_1_message_send_send_buffer_complete SendSendBufferComplete;
+ struct nvsp_1_message_revoke_send_buffer RevokeSendBuffer;
+
+ struct nvsp_1_message_send_rndis_packet SendRNDISPacket;
+ struct nvsp_1_message_send_rndis_packet_complete
+ SendRNDISPacketComplete;
+} __attribute__((packed));
+
+union nvsp_all_messages {
+ union nvsp_message_init_uber InitMessages;
+ union nvsp_1_message_uber Version1Messages;
+} __attribute__((packed));
+
+/* ALL Messages */
+struct nvsp_message {
+ struct nvsp_message_header Header;
+ union nvsp_all_messages Messages;
+} __attribute__((packed));
+
+
+
+
+/* #define NVSC_MIN_PROTOCOL_VERSION 1 */
+/* #define NVSC_MAX_PROTOCOL_VERSION 1 */
+
+#define NETVSC_SEND_BUFFER_SIZE (64*1024) /* 64K */
+#define NETVSC_SEND_BUFFER_ID 0xface
+
+
+#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024) /* 1MB */
+
+#define NETVSC_RECEIVE_BUFFER_ID 0xcafe
+
+#define NETVSC_RECEIVE_SG_COUNT 1
+
+/* Preallocated receive packets */
+#define NETVSC_RECEIVE_PACKETLIST_COUNT 256
+
+#define NETVSC_PACKET_SIZE 2048
+
+/* Per netvsc channel-specific */
+struct netvsc_device {
+ struct hv_device *Device;
+
+ atomic_t RefCount;
+ atomic_t NumOutstandingSends;
+ /*
+ * List of free preallocated hv_netvsc_packet to represent receive
+ * packet
+ */
+ struct list_head ReceivePacketList;
+ spinlock_t receive_packet_list_lock;
+
+ /* Send buffer allocated by us but manages by NetVSP */
+ void *SendBuffer;
+ u32 SendBufferSize;
+ u32 SendBufferGpadlHandle;
+ u32 SendSectionSize;
+
+ /* Receive buffer allocated by us but manages by NetVSP */
+ void *ReceiveBuffer;
+ u32 ReceiveBufferSize;
+ u32 ReceiveBufferGpadlHandle;
+ u32 ReceiveSectionCount;
+ struct nvsp_1_receive_buffer_section *ReceiveSections;
+
+ /* Used for NetVSP initialization protocol */
+ struct osd_waitevent *ChannelInitEvent;
+ struct nvsp_message ChannelInitPacket;
+
+ struct nvsp_message RevokePacket;
+ /* unsigned char HwMacAddr[HW_MACADDR_LEN]; */
+
+ /* Holds rndis device info */
+ void *Extension;
+};
+
+#endif /* _NETVSC_H_ */
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff