![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Cc: Hank Janssen <hjanssen@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
859 lines
23 KiB
C
859 lines
23 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include "osd.h"
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#include "logging.h"
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#include "storvsc_api.h"
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#include "vmbus_packet_format.h"
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#include "vstorage.h"
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struct storvsc_request_extension {
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/* LIST_ENTRY ListEntry; */
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struct hv_storvsc_request *Request;
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struct hv_device *Device;
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/* Synchronize the request/response if needed */
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struct osd_waitevent *WaitEvent;
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struct vstor_packet VStorPacket;
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};
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/* A storvsc device is a device object that contains a vmbus channel */
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struct storvsc_device {
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struct hv_device *Device;
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/* 0 indicates the device is being destroyed */
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atomic_t RefCount;
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atomic_t NumOutstandingRequests;
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/*
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* Each unique Port/Path/Target represents 1 channel ie scsi
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* controller. In reality, the pathid, targetid is always 0
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* and the port is set by us
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*/
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unsigned int PortNumber;
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unsigned char PathId;
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unsigned char TargetId;
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/* LIST_ENTRY OutstandingRequestList; */
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/* HANDLE OutstandingRequestLock; */
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/* Used for vsc/vsp channel reset process */
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struct storvsc_request_extension InitRequest;
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struct storvsc_request_extension ResetRequest;
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};
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static const char *gDriverName = "storvsc";
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/* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
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static const struct hv_guid gStorVscDeviceType = {
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.data = {
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0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d,
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0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f
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}
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};
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static inline struct storvsc_device *AllocStorDevice(struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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storDevice = kzalloc(sizeof(struct storvsc_device), GFP_KERNEL);
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if (!storDevice)
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return NULL;
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/* Set to 2 to allow both inbound and outbound traffics */
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/* (ie GetStorDevice() and MustGetStorDevice()) to proceed. */
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atomic_cmpxchg(&storDevice->RefCount, 0, 2);
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storDevice->Device = Device;
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Device->Extension = storDevice;
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return storDevice;
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}
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static inline void FreeStorDevice(struct storvsc_device *Device)
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{
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/* ASSERT(atomic_read(&Device->RefCount) == 0); */
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kfree(Device);
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}
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/* Get the stordevice object iff exists and its refcount > 1 */
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static inline struct storvsc_device *GetStorDevice(struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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storDevice = (struct storvsc_device *)Device->Extension;
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if (storDevice && atomic_read(&storDevice->RefCount) > 1)
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atomic_inc(&storDevice->RefCount);
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else
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storDevice = NULL;
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return storDevice;
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}
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/* Get the stordevice object iff exists and its refcount > 0 */
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static inline struct storvsc_device *MustGetStorDevice(struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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storDevice = (struct storvsc_device *)Device->Extension;
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if (storDevice && atomic_read(&storDevice->RefCount))
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atomic_inc(&storDevice->RefCount);
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else
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storDevice = NULL;
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return storDevice;
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}
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static inline void PutStorDevice(struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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storDevice = (struct storvsc_device *)Device->Extension;
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/* ASSERT(storDevice); */
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atomic_dec(&storDevice->RefCount);
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/* ASSERT(atomic_read(&storDevice->RefCount)); */
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}
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/* Drop ref count to 1 to effectively disable GetStorDevice() */
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static inline struct storvsc_device *ReleaseStorDevice(struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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storDevice = (struct storvsc_device *)Device->Extension;
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/* ASSERT(storDevice); */
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/* Busy wait until the ref drop to 2, then set it to 1 */
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while (atomic_cmpxchg(&storDevice->RefCount, 2, 1) != 2)
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udelay(100);
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return storDevice;
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}
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/* Drop ref count to 0. No one can use StorDevice object. */
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static inline struct storvsc_device *FinalReleaseStorDevice(
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struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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storDevice = (struct storvsc_device *)Device->Extension;
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/* ASSERT(storDevice); */
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/* Busy wait until the ref drop to 1, then set it to 0 */
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while (atomic_cmpxchg(&storDevice->RefCount, 1, 0) != 1)
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udelay(100);
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Device->Extension = NULL;
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return storDevice;
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}
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static int StorVscChannelInit(struct hv_device *Device)
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{
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struct storvsc_device *storDevice;
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struct storvsc_request_extension *request;
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struct vstor_packet *vstorPacket;
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int ret;
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storDevice = GetStorDevice(Device);
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if (!storDevice) {
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DPRINT_ERR(STORVSC, "unable to get stor device..."
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"device being destroyed?");
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DPRINT_EXIT(STORVSC);
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return -1;
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}
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request = &storDevice->InitRequest;
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vstorPacket = &request->VStorPacket;
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/*
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* Now, initiate the vsc/vsp initialization protocol on the open
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* channel
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*/
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memset(request, 0, sizeof(struct storvsc_request_extension));
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request->WaitEvent = osd_WaitEventCreate();
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if (!request->WaitEvent) {
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ret = -ENOMEM;
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goto nomem;
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}
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vstorPacket->Operation = VStorOperationBeginInitialization;
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
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/*SpinlockAcquire(gDriverExt.packetListLock);
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INSERT_TAIL_LIST(&gDriverExt.packetList, &packet->listEntry.entry);
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SpinlockRelease(gDriverExt.packetListLock);*/
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DPRINT_INFO(STORVSC, "BEGIN_INITIALIZATION_OPERATION...");
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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vstorPacket,
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sizeof(struct vstor_packet),
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(unsigned long)request,
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VmbusPacketTypeDataInBand,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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if (ret != 0) {
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DPRINT_ERR(STORVSC,
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"unable to send BEGIN_INITIALIZATION_OPERATION");
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goto Cleanup;
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}
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osd_WaitEventWait(request->WaitEvent);
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if (vstorPacket->Operation != VStorOperationCompleteIo ||
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vstorPacket->Status != 0) {
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DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed "
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"(op %d status 0x%x)",
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vstorPacket->Operation, vstorPacket->Status);
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goto Cleanup;
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}
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DPRINT_INFO(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION...");
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/* reuse the packet for version range supported */
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memset(vstorPacket, 0, sizeof(struct vstor_packet));
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vstorPacket->Operation = VStorOperationQueryProtocolVersion;
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
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vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT;
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FILL_VMSTOR_REVISION(vstorPacket->Version.Revision);
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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vstorPacket,
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sizeof(struct vstor_packet),
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(unsigned long)request,
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VmbusPacketTypeDataInBand,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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if (ret != 0) {
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DPRINT_ERR(STORVSC,
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"unable to send BEGIN_INITIALIZATION_OPERATION");
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goto Cleanup;
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}
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osd_WaitEventWait(request->WaitEvent);
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/* TODO: Check returned version */
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if (vstorPacket->Operation != VStorOperationCompleteIo ||
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vstorPacket->Status != 0) {
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DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed "
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"(op %d status 0x%x)",
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vstorPacket->Operation, vstorPacket->Status);
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goto Cleanup;
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}
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/* Query channel properties */
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DPRINT_INFO(STORVSC, "QUERY_PROPERTIES_OPERATION...");
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memset(vstorPacket, 0, sizeof(struct vstor_packet));
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vstorPacket->Operation = VStorOperationQueryProperties;
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
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vstorPacket->StorageChannelProperties.PortNumber =
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storDevice->PortNumber;
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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vstorPacket,
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sizeof(struct vstor_packet),
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(unsigned long)request,
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VmbusPacketTypeDataInBand,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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if (ret != 0) {
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DPRINT_ERR(STORVSC,
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"unable to send QUERY_PROPERTIES_OPERATION");
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goto Cleanup;
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}
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osd_WaitEventWait(request->WaitEvent);
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/* TODO: Check returned version */
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if (vstorPacket->Operation != VStorOperationCompleteIo ||
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vstorPacket->Status != 0) {
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DPRINT_ERR(STORVSC, "QUERY_PROPERTIES_OPERATION failed "
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"(op %d status 0x%x)",
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vstorPacket->Operation, vstorPacket->Status);
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goto Cleanup;
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}
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storDevice->PathId = vstorPacket->StorageChannelProperties.PathId;
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storDevice->TargetId = vstorPacket->StorageChannelProperties.TargetId;
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DPRINT_DBG(STORVSC, "channel flag 0x%x, max xfer len 0x%x",
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vstorPacket->StorageChannelProperties.Flags,
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vstorPacket->StorageChannelProperties.MaxTransferBytes);
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DPRINT_INFO(STORVSC, "END_INITIALIZATION_OPERATION...");
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memset(vstorPacket, 0, sizeof(struct vstor_packet));
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vstorPacket->Operation = VStorOperationEndInitialization;
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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vstorPacket,
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sizeof(struct vstor_packet),
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(unsigned long)request,
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VmbusPacketTypeDataInBand,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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if (ret != 0) {
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DPRINT_ERR(STORVSC,
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"unable to send END_INITIALIZATION_OPERATION");
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goto Cleanup;
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}
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osd_WaitEventWait(request->WaitEvent);
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if (vstorPacket->Operation != VStorOperationCompleteIo ||
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vstorPacket->Status != 0) {
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DPRINT_ERR(STORVSC, "END_INITIALIZATION_OPERATION failed "
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"(op %d status 0x%x)",
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vstorPacket->Operation, vstorPacket->Status);
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goto Cleanup;
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}
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DPRINT_INFO(STORVSC, "**** storage channel up and running!! ****");
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Cleanup:
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kfree(request->WaitEvent);
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request->WaitEvent = NULL;
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nomem:
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PutStorDevice(Device);
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DPRINT_EXIT(STORVSC);
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return ret;
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}
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static void StorVscOnIOCompletion(struct hv_device *Device,
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struct vstor_packet *VStorPacket,
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struct storvsc_request_extension *RequestExt)
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{
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struct hv_storvsc_request *request;
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struct storvsc_device *storDevice;
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DPRINT_ENTER(STORVSC);
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storDevice = MustGetStorDevice(Device);
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if (!storDevice) {
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DPRINT_ERR(STORVSC, "unable to get stor device..."
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"device being destroyed?");
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DPRINT_EXIT(STORVSC);
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return;
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}
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DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION - request extension %p "
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"completed bytes xfer %u", RequestExt,
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VStorPacket->VmSrb.DataTransferLength);
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/* ASSERT(RequestExt != NULL); */
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/* ASSERT(RequestExt->Request != NULL); */
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request = RequestExt->Request;
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/* ASSERT(request->OnIOCompletion != NULL); */
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/* Copy over the status...etc */
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request->Status = VStorPacket->VmSrb.ScsiStatus;
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if (request->Status != 0 || VStorPacket->VmSrb.SrbStatus != 1) {
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DPRINT_WARN(STORVSC,
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"cmd 0x%x scsi status 0x%x srb status 0x%x\n",
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request->Cdb[0], VStorPacket->VmSrb.ScsiStatus,
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VStorPacket->VmSrb.SrbStatus);
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}
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if ((request->Status & 0xFF) == 0x02) {
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/* CHECK_CONDITION */
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if (VStorPacket->VmSrb.SrbStatus & 0x80) {
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/* autosense data available */
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DPRINT_WARN(STORVSC, "storvsc pkt %p autosense data "
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"valid - len %d\n", RequestExt,
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VStorPacket->VmSrb.SenseInfoLength);
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/* ASSERT(VStorPacket->VmSrb.SenseInfoLength <= */
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/* request->SenseBufferSize); */
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memcpy(request->SenseBuffer,
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VStorPacket->VmSrb.SenseData,
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VStorPacket->VmSrb.SenseInfoLength);
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request->SenseBufferSize =
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VStorPacket->VmSrb.SenseInfoLength;
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}
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}
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/* TODO: */
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request->BytesXfer = VStorPacket->VmSrb.DataTransferLength;
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request->OnIOCompletion(request);
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atomic_dec(&storDevice->NumOutstandingRequests);
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PutStorDevice(Device);
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DPRINT_EXIT(STORVSC);
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}
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static void StorVscOnReceive(struct hv_device *Device,
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struct vstor_packet *VStorPacket,
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struct storvsc_request_extension *RequestExt)
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{
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switch (VStorPacket->Operation) {
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case VStorOperationCompleteIo:
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DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION");
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StorVscOnIOCompletion(Device, VStorPacket, RequestExt);
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break;
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case VStorOperationRemoveDevice:
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DPRINT_INFO(STORVSC, "REMOVE_DEVICE_OPERATION");
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/* TODO: */
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break;
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default:
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DPRINT_INFO(STORVSC, "Unknown operation received - %d",
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VStorPacket->Operation);
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break;
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}
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}
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static void StorVscOnChannelCallback(void *context)
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{
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struct hv_device *device = (struct hv_device *)context;
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struct storvsc_device *storDevice;
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u32 bytesRecvd;
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u64 requestId;
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unsigned char packet[ALIGN_UP(sizeof(struct vstor_packet), 8)];
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struct storvsc_request_extension *request;
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int ret;
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DPRINT_ENTER(STORVSC);
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/* ASSERT(device); */
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storDevice = MustGetStorDevice(device);
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if (!storDevice) {
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DPRINT_ERR(STORVSC, "unable to get stor device..."
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"device being destroyed?");
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DPRINT_EXIT(STORVSC);
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return;
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}
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do {
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ret = device->Driver->VmbusChannelInterface.RecvPacket(device,
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packet,
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ALIGN_UP(sizeof(struct vstor_packet), 8),
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&bytesRecvd, &requestId);
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if (ret == 0 && bytesRecvd > 0) {
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DPRINT_DBG(STORVSC, "receive %d bytes - tid %llx",
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bytesRecvd, requestId);
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/* ASSERT(bytesRecvd == sizeof(struct vstor_packet)); */
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request = (struct storvsc_request_extension *)
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(unsigned long)requestId;
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/* ASSERT(request);c */
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/* if (vstorPacket.Flags & SYNTHETIC_FLAG) */
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if ((request == &storDevice->InitRequest) ||
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(request == &storDevice->ResetRequest)) {
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/* DPRINT_INFO(STORVSC,
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* "reset completion - operation "
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* "%u status %u",
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* vstorPacket.Operation,
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* vstorPacket.Status); */
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memcpy(&request->VStorPacket, packet,
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sizeof(struct vstor_packet));
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osd_WaitEventSet(request->WaitEvent);
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} else {
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StorVscOnReceive(device,
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(struct vstor_packet *)packet,
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request);
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}
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} else {
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/* DPRINT_DBG(STORVSC, "nothing else to read..."); */
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break;
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}
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} while (1);
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PutStorDevice(device);
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DPRINT_EXIT(STORVSC);
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return;
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}
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static int StorVscConnectToVsp(struct hv_device *Device)
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{
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struct vmstorage_channel_properties props;
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struct storvsc_driver_object *storDriver;
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int ret;
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|
|
|
storDriver = (struct storvsc_driver_object *)Device->Driver;
|
|
memset(&props, 0, sizeof(struct vmstorage_channel_properties));
|
|
|
|
/* Open the channel */
|
|
ret = Device->Driver->VmbusChannelInterface.Open(Device,
|
|
storDriver->RingBufferSize,
|
|
storDriver->RingBufferSize,
|
|
(void *)&props,
|
|
sizeof(struct vmstorage_channel_properties),
|
|
StorVscOnChannelCallback,
|
|
Device);
|
|
|
|
DPRINT_DBG(STORVSC, "storage props: path id %d, tgt id %d, max xfer %d",
|
|
props.PathId, props.TargetId, props.MaxTransferBytes);
|
|
|
|
if (ret != 0) {
|
|
DPRINT_ERR(STORVSC, "unable to open channel: %d", ret);
|
|
return -1;
|
|
}
|
|
|
|
ret = StorVscChannelInit(Device);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* StorVscOnDeviceAdd - Callback when the device belonging to this driver is added
|
|
*/
|
|
static int StorVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo)
|
|
{
|
|
struct storvsc_device *storDevice;
|
|
/* struct vmstorage_channel_properties *props; */
|
|
struct storvsc_device_info *deviceInfo;
|
|
int ret = 0;
|
|
|
|
DPRINT_ENTER(STORVSC);
|
|
|
|
deviceInfo = (struct storvsc_device_info *)AdditionalInfo;
|
|
storDevice = AllocStorDevice(Device);
|
|
if (!storDevice) {
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Save the channel properties to our storvsc channel */
|
|
/* props = (struct vmstorage_channel_properties *)
|
|
* channel->offerMsg.Offer.u.Standard.UserDefined; */
|
|
|
|
/* FIXME: */
|
|
/*
|
|
* If we support more than 1 scsi channel, we need to set the
|
|
* port number here to the scsi channel but how do we get the
|
|
* scsi channel prior to the bus scan
|
|
*/
|
|
|
|
/* storChannel->PortNumber = 0;
|
|
storChannel->PathId = props->PathId;
|
|
storChannel->TargetId = props->TargetId; */
|
|
|
|
storDevice->PortNumber = deviceInfo->PortNumber;
|
|
/* Send it back up */
|
|
ret = StorVscConnectToVsp(Device);
|
|
|
|
/* deviceInfo->PortNumber = storDevice->PortNumber; */
|
|
deviceInfo->PathId = storDevice->PathId;
|
|
deviceInfo->TargetId = storDevice->TargetId;
|
|
|
|
DPRINT_DBG(STORVSC, "assigned port %u, path %u target %u\n",
|
|
storDevice->PortNumber, storDevice->PathId,
|
|
storDevice->TargetId);
|
|
|
|
Cleanup:
|
|
DPRINT_EXIT(STORVSC);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* StorVscOnDeviceRemove - Callback when the our device is being removed
|
|
*/
|
|
static int StorVscOnDeviceRemove(struct hv_device *Device)
|
|
{
|
|
struct storvsc_device *storDevice;
|
|
|
|
DPRINT_ENTER(STORVSC);
|
|
|
|
DPRINT_INFO(STORVSC, "disabling storage device (%p)...",
|
|
Device->Extension);
|
|
|
|
storDevice = ReleaseStorDevice(Device);
|
|
|
|
/*
|
|
* At this point, all outbound traffic should be disable. We
|
|
* only allow inbound traffic (responses) to proceed so that
|
|
* outstanding requests can be completed.
|
|
*/
|
|
while (atomic_read(&storDevice->NumOutstandingRequests)) {
|
|
DPRINT_INFO(STORVSC, "waiting for %d requests to complete...",
|
|
atomic_read(&storDevice->NumOutstandingRequests));
|
|
udelay(100);
|
|
}
|
|
|
|
DPRINT_INFO(STORVSC, "removing storage device (%p)...",
|
|
Device->Extension);
|
|
|
|
storDevice = FinalReleaseStorDevice(Device);
|
|
|
|
DPRINT_INFO(STORVSC, "storage device (%p) safe to remove", storDevice);
|
|
|
|
/* Close the channel */
|
|
Device->Driver->VmbusChannelInterface.Close(Device);
|
|
|
|
FreeStorDevice(storDevice);
|
|
|
|
DPRINT_EXIT(STORVSC);
|
|
return 0;
|
|
}
|
|
|
|
int StorVscOnHostReset(struct hv_device *Device)
|
|
{
|
|
struct storvsc_device *storDevice;
|
|
struct storvsc_request_extension *request;
|
|
struct vstor_packet *vstorPacket;
|
|
int ret;
|
|
|
|
DPRINT_ENTER(STORVSC);
|
|
|
|
DPRINT_INFO(STORVSC, "resetting host adapter...");
|
|
|
|
storDevice = GetStorDevice(Device);
|
|
if (!storDevice) {
|
|
DPRINT_ERR(STORVSC, "unable to get stor device..."
|
|
"device being destroyed?");
|
|
DPRINT_EXIT(STORVSC);
|
|
return -1;
|
|
}
|
|
|
|
request = &storDevice->ResetRequest;
|
|
vstorPacket = &request->VStorPacket;
|
|
|
|
request->WaitEvent = osd_WaitEventCreate();
|
|
if (!request->WaitEvent) {
|
|
ret = -ENOMEM;
|
|
goto Cleanup;
|
|
}
|
|
|
|
vstorPacket->Operation = VStorOperationResetBus;
|
|
vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
|
|
vstorPacket->VmSrb.PathId = storDevice->PathId;
|
|
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
vstorPacket,
|
|
sizeof(struct vstor_packet),
|
|
(unsigned long)&storDevice->ResetRequest,
|
|
VmbusPacketTypeDataInBand,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
if (ret != 0) {
|
|
DPRINT_ERR(STORVSC, "Unable to send reset packet %p ret %d",
|
|
vstorPacket, ret);
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* FIXME: Add a timeout */
|
|
osd_WaitEventWait(request->WaitEvent);
|
|
|
|
kfree(request->WaitEvent);
|
|
DPRINT_INFO(STORVSC, "host adapter reset completed");
|
|
|
|
/*
|
|
* At this point, all outstanding requests in the adapter
|
|
* should have been flushed out and return to us
|
|
*/
|
|
|
|
Cleanup:
|
|
PutStorDevice(Device);
|
|
DPRINT_EXIT(STORVSC);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* StorVscOnIORequest - Callback to initiate an I/O request
|
|
*/
|
|
static int StorVscOnIORequest(struct hv_device *Device,
|
|
struct hv_storvsc_request *Request)
|
|
{
|
|
struct storvsc_device *storDevice;
|
|
struct storvsc_request_extension *requestExtension;
|
|
struct vstor_packet *vstorPacket;
|
|
int ret = 0;
|
|
|
|
DPRINT_ENTER(STORVSC);
|
|
|
|
requestExtension =
|
|
(struct storvsc_request_extension *)Request->Extension;
|
|
vstorPacket = &requestExtension->VStorPacket;
|
|
storDevice = GetStorDevice(Device);
|
|
|
|
DPRINT_DBG(STORVSC, "enter - Device %p, DeviceExt %p, Request %p, "
|
|
"Extension %p", Device, storDevice, Request,
|
|
requestExtension);
|
|
|
|
DPRINT_DBG(STORVSC, "req %p len %d bus %d, target %d, lun %d cdblen %d",
|
|
Request, Request->DataBuffer.Length, Request->Bus,
|
|
Request->TargetId, Request->LunId, Request->CdbLen);
|
|
|
|
if (!storDevice) {
|
|
DPRINT_ERR(STORVSC, "unable to get stor device..."
|
|
"device being destroyed?");
|
|
DPRINT_EXIT(STORVSC);
|
|
return -2;
|
|
}
|
|
|
|
/* print_hex_dump_bytes("", DUMP_PREFIX_NONE, Request->Cdb,
|
|
* Request->CdbLen); */
|
|
|
|
requestExtension->Request = Request;
|
|
requestExtension->Device = Device;
|
|
|
|
memset(vstorPacket, 0 , sizeof(struct vstor_packet));
|
|
|
|
vstorPacket->Flags |= REQUEST_COMPLETION_FLAG;
|
|
|
|
vstorPacket->VmSrb.Length = sizeof(struct vmscsi_request);
|
|
|
|
vstorPacket->VmSrb.PortNumber = Request->Host;
|
|
vstorPacket->VmSrb.PathId = Request->Bus;
|
|
vstorPacket->VmSrb.TargetId = Request->TargetId;
|
|
vstorPacket->VmSrb.Lun = Request->LunId;
|
|
|
|
vstorPacket->VmSrb.SenseInfoLength = SENSE_BUFFER_SIZE;
|
|
|
|
/* Copy over the scsi command descriptor block */
|
|
vstorPacket->VmSrb.CdbLength = Request->CdbLen;
|
|
memcpy(&vstorPacket->VmSrb.Cdb, Request->Cdb, Request->CdbLen);
|
|
|
|
vstorPacket->VmSrb.DataIn = Request->Type;
|
|
vstorPacket->VmSrb.DataTransferLength = Request->DataBuffer.Length;
|
|
|
|
vstorPacket->Operation = VStorOperationExecuteSRB;
|
|
|
|
DPRINT_DBG(STORVSC, "srb - len %d port %d, path %d, target %d, "
|
|
"lun %d senselen %d cdblen %d",
|
|
vstorPacket->VmSrb.Length,
|
|
vstorPacket->VmSrb.PortNumber,
|
|
vstorPacket->VmSrb.PathId,
|
|
vstorPacket->VmSrb.TargetId,
|
|
vstorPacket->VmSrb.Lun,
|
|
vstorPacket->VmSrb.SenseInfoLength,
|
|
vstorPacket->VmSrb.CdbLength);
|
|
|
|
if (requestExtension->Request->DataBuffer.Length) {
|
|
ret = Device->Driver->VmbusChannelInterface.
|
|
SendPacketMultiPageBuffer(Device,
|
|
&requestExtension->Request->DataBuffer,
|
|
vstorPacket,
|
|
sizeof(struct vstor_packet),
|
|
(unsigned long)requestExtension);
|
|
} else {
|
|
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
|
vstorPacket,
|
|
sizeof(struct vstor_packet),
|
|
(unsigned long)requestExtension,
|
|
VmbusPacketTypeDataInBand,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
}
|
|
|
|
if (ret != 0) {
|
|
DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d",
|
|
vstorPacket, ret);
|
|
}
|
|
|
|
atomic_inc(&storDevice->NumOutstandingRequests);
|
|
|
|
PutStorDevice(Device);
|
|
|
|
DPRINT_EXIT(STORVSC);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* StorVscOnCleanup - Perform any cleanup when the driver is removed
|
|
*/
|
|
static void StorVscOnCleanup(struct hv_driver *Driver)
|
|
{
|
|
DPRINT_ENTER(STORVSC);
|
|
DPRINT_EXIT(STORVSC);
|
|
}
|
|
|
|
/*
|
|
* StorVscInitialize - Main entry point
|
|
*/
|
|
int StorVscInitialize(struct hv_driver *Driver)
|
|
{
|
|
struct storvsc_driver_object *storDriver;
|
|
|
|
DPRINT_ENTER(STORVSC);
|
|
|
|
storDriver = (struct storvsc_driver_object *)Driver;
|
|
|
|
DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%zd "
|
|
"sizeof(struct storvsc_request_extension)=%zd "
|
|
"sizeof(struct vstor_packet)=%zd, "
|
|
"sizeof(struct vmscsi_request)=%zd",
|
|
sizeof(struct hv_storvsc_request),
|
|
sizeof(struct storvsc_request_extension),
|
|
sizeof(struct vstor_packet),
|
|
sizeof(struct vmscsi_request));
|
|
|
|
/* Make sure we are at least 2 pages since 1 page is used for control */
|
|
/* ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1)); */
|
|
|
|
Driver->name = gDriverName;
|
|
memcpy(&Driver->deviceType, &gStorVscDeviceType,
|
|
sizeof(struct hv_guid));
|
|
|
|
storDriver->RequestExtSize = sizeof(struct storvsc_request_extension);
|
|
|
|
/*
|
|
* Divide the ring buffer data size (which is 1 page less
|
|
* than the ring buffer size since that page is reserved for
|
|
* the ring buffer indices) by the max request size (which is
|
|
* VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER + struct vstor_packet + u64)
|
|
*/
|
|
storDriver->MaxOutstandingRequestsPerChannel =
|
|
((storDriver->RingBufferSize - PAGE_SIZE) /
|
|
ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET +
|
|
sizeof(struct vstor_packet) + sizeof(u64),
|
|
sizeof(u64)));
|
|
|
|
DPRINT_INFO(STORVSC, "max io %u, currently %u\n",
|
|
storDriver->MaxOutstandingRequestsPerChannel,
|
|
STORVSC_MAX_IO_REQUESTS);
|
|
|
|
/* Setup the dispatch table */
|
|
storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd;
|
|
storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove;
|
|
storDriver->Base.OnCleanup = StorVscOnCleanup;
|
|
|
|
storDriver->OnIORequest = StorVscOnIORequest;
|
|
|
|
DPRINT_EXIT(STORVSC);
|
|
|
|
return 0;
|
|
}
|