Upper filter driver

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- Previous
  - 1
    - IRP_MN_QUERY_STOP_DEVICE race in WDM book? Is there a race in the "devqueue" example that comes with the WDM book with regard to causing I/O's to be stopped or aborted? It looks like the testing of the abortstatus/stallcount flags and the setting of the CurrentIrp pointer is done in the wrong order. Even in service pack 3, couldn't this happen: - StartPacket sees abortstatus, stallcount, and CurrentIrp are all clear - HandleQueryStop calls StallAllRequests to increment stallcount - HandleQueryStop calls WaitForCurrentIrps which sees that CurrentIrp is clear and so it doesn't wait - HandleQueryStop releases the device's resources and passes down the IRP_MN_QUERY_STOP_DEVICE to allow it to be completed - StartPacket sets CurrentIrp and initiates I/O after the device's resources have already been released (bad) Is this a test-and-set race on the part of StartPacket? To fix it, shouldn't it be made into a set-then-test (opposite order), where StartPacket would set CurrentIrp or some other equivalent flag _before_ testing abortstatus and stallcount? (HandleQueryStop is already doing a set-then-test, so it should be okay for its part) Tag: Upper filter driver Tag: 86947
  - 2
    - Queries About Multiple Device Objects...Please Help... Hello all, Specific Question: I have written a AV Stream Class (WDM)Mindiver and I dont know how restrict it to habdle only One device object. and if in future if i want to implement it for multiple device object.. how should i do.? General Queries: 1) How should driver handle multiple Device Object, I mean what is generally done to keep track of Device Object 2) In case of Multiple device Object, how driver Identifies IRPs for respective Device Objects. 3) How can multiple aaplications can use same driver and same device for its use.Is it possible? Please help me to find out answers of above queries, It would be great help.. Thanks in Advance. Darshan Tag: Upper filter driver Tag: 86943
  - 3
    - About sending data to the printer via printer driver / dll driver Respected Sir, I would like to know asto how can I send the data tobe printed to the printer via kernel driver and also that, how can I send the data via my kernel driver to printer driver, that data to be printer on printer? please let me know in detailed manner. Tag: Upper filter driver Tag: 86942
  - 4
    - Why Smart card reader is not listed by the resource manager ? Hi, I have written a smart card reader driver using the ddk sample pscr for WinXP. When the WinAPI 'SCardListReaders' is called, its not listing my reader. But the installation and the registry entries for my reader driver is perfect and as described by the DDK help. The resource manager service has been started also. But one thing i have observed is, the IRP's related to Power management are not coming to the driver (Is this because, the member PowerMgmtSupport' in the card capabilities is not at all initialized ?). IRP_MJ_START_DEVICE and other IRP's are coming and also, another minor IRP, IRP_MN_QUERY_LEGACY_BUS_INFORMATION is observed.. is this because i have set the 'Reader Type' member in the reader capabilities to SCARD_READER_TYPE_VENDOR since its a PCI reader and there is no specific type defined for PCI. What should i do so that the resource manager recognizes our card reader ? Regards Esha Tag: Upper filter driver Tag: 86930
  - 5
    - Matching device object buffering flags An intermediate driver must agree with the next-lower driver's device object about DO_DIRECT_IO or DO_BUFFERED_IO, but a highest-level driver (FSD?) is allowed to use whatever buffering method it wants or neither. Does this mean that if an FSD is using neither I/O, before it passes an IRP to a driver below it that wants DO_BUFFERED_IO, the FSD has to do the validity checking, alignment guarantee, and memcopy before/after to make the lower driver happy? I was initially confused by the implication that one driver in a stack could use whatever buffering method it wants and wondered how that could be reconciled with passing IRPs down the stack to other drivers that might use a different buffering method. Tag: Upper filter driver Tag: 86911
  - 6
    - DeviceIoControl FSCTL_ALLOW_EXTENDED_DASD_IO returns false Hi, CString str = \\\\.\\CdRom0; hCD = CreateFile (str, GENERIC_READ| GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); status = DeviceIoControl(hCD, FSCTL_ALLOW_EXTENDED_DASD_IO , NULL, 0, NULL, 0, &returned, NULL); The above DeviceIoControl returns false. Any one knows what , I am doing wrong.? I tried this above after ReadFile failed for some sectors of a file in a single file CDROM. This happened when I tried to copy the file, it gave device I/O error. Tag: Upper filter driver Tag: 86905
  - 7
    - DeviceIoControl FSCTL_ALLOW_EXTENDED_DASD_IO returns false Hi, CString str = \\\\.\\CdRom0; hCD = CreateFile (str, GENERIC_READ| GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); status = DeviceIoControl(hCD, FSCTL_ALLOW_EXTENDED_DASD_IO , NULL, 0, NULL, 0, &returned, NULL); The above DeviceIoControl returns false. Any one knows what , I am doing wrong.? I tried this above after ReadFile failed for some sectors of a file in a single file CDROM. This happened when I tried to copy the file, it gave device I/O error. Tag: Upper filter driver Tag: 86904
  - 8
    - Two buffering methods for one IOCTL? While trying to understand how different buffering methods work, I came across an odd IOCTL, IOCTL_CDROM_RAW_READ. The DDK description of it seems normal at first. There's Irp->AssociatedIrp.SystemBuffer for buffered input and Irp->MdlAddress for direct output, and the IOCTL is defined in the DDK headers to use METHOD_OUT_DIRECT. That's fine, but the description also says that if the IOCTL is sent from kernel mode then Type3InputBuffer should be used for input, and it's not even clear what should be used for output. Type3InputBuffer is for METHOD_NEITHER, except the IOCTL is already using METHOD_OUT_DIRECT. How can an IOCTL like this that mixes two different buffering methods be sent, and how is the receiver supposed to know which method was used by the sender? Tag: Upper filter driver Tag: 86903
  - 9
    - Job opportunities in Silicon Valley If you develop drivers for graphics or audio or storage, I have fulltime opportunities at a solid and exciting company in Silicon Valley. This company is doing new and exciting things that noone else is doing yet and the opportunity to work with other smart Engineers/Developers is here!! The work is in Silicon Valley, so we need you to be there, or willing to move there from another spot in the USA (will pay relocation for right folks of course). I represent a great company, and the company is full of very intelligant, capable and creative folks! We need software developers/engineers with openGL or 3D experience, and we need people that create device drivers for Audio. We also need people that create device drivers for Windows storage (sata, scsi, raid etc). If you are seeking to work on new and exciting technology at a great company, please contact me, Maryellen O'Connell at maryell...@volt.com or call me at 888-933-8658. Thanks! Tag: Upper filter driver Tag: 86895
  - 10
    - USB Device Change Notification Hello All, I am working on WIN 32 Application which gets USB device arrival/removal notification. I used WM_DEVICECHANGE message in WndProc() function. I implemented the DoRegisterDeviceInterface() function when device is opened using CreateFile(): BOOL DoRegisterDeviceInterface( HDEVNOTIFY *hDevNotify ) { DEV_BROADCAST_HANDLE NotificationFilter; DWORD Err; TCHAR msg[MAX_PATH]; ZeroMemory( &NotificationFilter, sizeof(NotificationFilter) ); NotificationFilter.dbch_size = sizeof(DEV_BROADCAST_HANDLE); NotificationFilter.dbch_devicetype = DBT_DEVTYP_HANDLE; NotificationFilter.dbch_handle = hDevice; // Register handle based notification to receive pnp // device change notification on the handle. *hDevNotify = RegisterDeviceNotification( m_hWnd, &NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE ); if(!*hDevNotify) { Err = GetLastError(); _stprintf(msg, "RegisterDeviceNotification failed: %lx.\n", Err); MessageBox(0, msg, 0, 0); return FALSE; } return TRUE; } WndProc(...) { case DEVICECHANGE: { if((wParam & 0xC000) == 0x8000) { if (pBroadcasthdr->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) { HandleDeviceInterfaceChange(hWnd, nEventType); } else if (pBroadcasthdr->dbch_devicetype == DBT_DEVTYP_HANDLE) { HandleDeviceChange(hWnd, nEventType); } } break; } } The wparam is always 0x0007, which notifies of DBT_DEVNODES_CHANGED event only. i never get DBT_DEVICEARRIVAL or DBT_DEVICEREMOVECOMPLETE notification. I get the correct notification of Device Arrival and Removal when a CD is placed or removed in CDROM drive but not for USB device. Suggest me if im going wrong in my code. Thank You, Regards, Sushma Tag: Upper filter driver Tag: 86885
  - 11
    - need traceview or equivalent tool I have traceview 2.0.15 from WINDDK (3790.1830). But it won't work at all with message "cannot find pdb file" when I try to add a provider through "PDB File" option. I learned from this group that the traceview 1.9 and 1.9.1 actually work. Can someone point me to a site so that I can download the same/equivalent tool that works? Thanks a lot. Tag: Upper filter driver Tag: 86884
  - 12
    - need traceview or equivalent tool I have traceview 2.0.15 from WINDDK (3790.1830). But it won't work at all with message "cannot find pdb file" when I try to add a provider through "PDB File" option. I learned from this group that the traceview 1.9 and 1.9.1 actually work. Can someone point me to a site so that I can download the same/equivalent tool that works? Thanks a lot. Tag: Upper filter driver Tag: 86883
  - 13
    - Regarding COM in the kernel Hi, Is there some kind of light weight framework for COM programming in the kernel ? I know some KS samples rely on the CUnknown class defined in <stdunk.h> (in the /inc/ddk/xxx directory) but after a quick look at the implementation in "stdunk.cpp" (in /src/wdm/audio/stdunk), I noticed quite a few oddities (dynamic_cast<>, cascaded casts, ...) I am sure it works but ... well I also noticed a CBaseUnknown in <kcom.h> with implementation of INonDelegatedUnknown and IIndirectedUnknown. What is the purpose of the later ? Is the class useful for a miniport ? What is the prefered method ? Tag: Upper filter driver Tag: 86879
  - 14
    - Geometric wide lines I have a problem developing printer driver with geometric wide lines support. After I set GCAPS_GEOMETRICWIDE flag in flGraphicsCaps field of DEVINFO structure, the GDI starts calling DrvStrokePath function of my driver for wide lines as expected. But when I enumerate paths from PATHOBJ, I see that they constitute outlines of wide lines and not original wide line curves which I need. Can anyone tell me if I can get original wide line curves and not their GDI realization? Essentiually, it means that if a graphic printing application uses code such as this to draw a wide line: hpen = ExtCreatePen (PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_ROUND | PS_JOIN_BEVEL, 20, &penBrush, 0, NULL); SelectObject (hdc, hpen); MoveToEx(hdc,100,50,NULL); LineTo(hdc,100,300); how I can get original line coordinates (100,50), (100,300)? I found that I can get line width, cap and join from LINEATTRS structure but not the original coordinates. Tag: Upper filter driver Tag: 86877
  - 15
    - Geometric wide lines I have a problem developing printer driver with geometric wide lines support. After I set GCAPS_GEOMETRICWIDE flag in flGraphicsCaps field of DEVINFO structure, the GDI starts calling DrvStrokePath function of my driver for wide lines as expected. But when I enumerate paths from PATHOBJ, I see that they constitute outlines of wide lines and not original wide line curves which I need. Can anyone tell me if I can get original wide line curves and not their GDI realization? Essentiually, it means that if a graphic printing application uses code such as this to draw a wide line: hpen = ExtCreatePen (PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_ROUND | PS_JOIN_BEVEL, 20, &penBrush, 0, NULL); SelectObject (hdc, hpen); MoveToEx(hdc,100,50,NULL); LineTo(hdc,100,300); how I can get original line coordinates (100,50), (100,300)? I found that I can get line width, cap and join from LINEATTRS structure but not the original coordinates. Tag: Upper filter driver Tag: 86876
  - 16
    - Geometric wide lines I have a problem developing printer driver with geometric wide lines support. After I set GCAPS_GEOMETRICWIDE flag in flGraphicsCaps field of DEVINFO structure, the GDI starts calling DrvStrokePath function of my driver for wide lines as expected. But when I enumerate paths from PATHOBJ, I see that they constitute outlines of wide lines and not original wide line curves which I need. Can anyone tell me if I can get original wide line curves and not their GDI realization? Essentiually, it means that if a graphic printing application uses code such as this to draw a wide line: hpen = ExtCreatePen (PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_ROUND | PS_JOIN_BEVEL, 20, &penBrush, 0, NULL); SelectObject (hdc, hpen); MoveToEx(hdc,100,50,NULL); LineTo(hdc,100,300); how I can get original line coordinates (100,50), (100,300)? I found that I can get line width, cap and join from LINEATTRS structure but not the original coordinates. Tag: Upper filter driver Tag: 86875
  - 17
    - MaximumTransferSize limit for bulk on EHCI in Vista RC2 (5744)? I have an USB2.0 device that communicates pieces of data as large bulk transfers (1-2 MB). On XP I can receive them correctly. As the doc says, MaximumTransferSize seems practically unlimited. On Vista RC2 (5744), USBD_CreateConfigurationRequestEx comes back with MaximumTransferSize set to 0x400000 (no matter what I put there before). This is too small for my bulk transfer (though the doc doesn't know anything about such a limit on Vista). Any way to override this limit? Any way to split up the transfer without modifying the device's firmware? I'm not that fluent with the dirty details of USB bulk transfer so I'm not sure what kind of concepts would apply here?! Tag: Upper filter driver Tag: 86872
  - 18
    - MaximumTransferSize limit for bulk on EHCI in Vista RC2 (5744)? I have an USB2.0 device that communicates pieces of data as large bulk transfers (1-2 MB). On XP I can receive them correctly. As the doc says, MaximumTransferSize seems practically unlimited. On Vista RC2 (5744), USBD_CreateConfigurationRequestEx comes back with MaximumTransferSize set to 0x400000 (no matter what I put there before). This is too small for my bulk transfer (though the doc doesn't know anything about such a limit on Vista). Any way to override this limit? Any way to split up the transfer without modifying the device's firmware? I'm not that fluent with the dirty details of USB bulk transfer so I'm not sure what kind of concepts would apply here?! Tag: Upper filter driver Tag: 86871
  - 19
    - Iocalldriver never returns I am having a stringe problem for my Windows 2000 Usb driver. When i am reading data from the usb device, sometimes the Iocalldriver never sets the event i am waiting for. Notice that this only happens sometimes, and only on one specific computer. Windows XP on that computer does not have this issue. The code is: --START CODE-- UsbBuildInterruptOrBulkTransferRequest( &current->dUrb, sizeof(_URB_BULK_OR_INTERRUPT_TRANSFER), pdx->myPipe, &buffer->data, NULL, pdx->bufferChunkSize, USBD_TRANSFER_DIRECTION_IN | USBD_SHORT_TRANSFER_OK, NULL ); KeInitializeEvent(&current->dEvent, NotificationEvent, FALSE); current->dIrp = IoBuildDeviceIoControlRequest( IOCTL_INTERNAL_USB_SUBMIT_URB, pdx->LowerDeviceObject, NULL, 0, InputBufferLength NULL, OutputBuffer 0, OutputBufferLength TRUE, InternalDeviceIoControl &current->dEvent, &current->dIostatus ); if (!current->dIrp) { KdPrint((DRIVERNAME " - IN Pollingthread: Unable to allocate IRP for sending URB\n")); goto endThread; } stack = IoGetNextIrpStackLocation(current->dIrp); stack->Parameters.Others.Argument1 = (PVOID) (PURB) &current->dUrb; status = IoCallDriver(pdx->LowerDeviceObject, current->dIrp); if (!NT_SUCCESS(status)) { KdPrint((DRIVERNAME " - IN Pollingthread: IoCallDriver 1 failed with error code: %8.8X\n",status)); InterlockedExchange(&pdx->error, status); KeSetEvent(&pdx->errorEvent, 0, FALSE); goto endThread; } if(status != STATUS_PENDING) { KdPrint((DRIVERNAME " - IN Pollingthread: IoCallDriver did not return STATUS_PENDING, instead it returned: %8.8X\n",status)); goto endThread; } status = KeWaitForMultipleObjects( 2, current->dCompleteEvents, WaitAny, Executive, KernelMode, WaitMode FALSE, NULL, NULL ); --END CODE-- So, sometimes the KeWaitForMultipleObjects does not get released until i manually unplugg the device and the error event is set. Can anyone see anything in the code that might cause this to work sometimes and sometimes not? Regards Wilhelm Tag: Upper filter driver Tag: 86866
  - 20
    - NDIS5.1 driver in Vista Hi All, I am using my NDIS 5.1 miniport driver written for WinXP prof in Vista Build 5600 (Vista RC1). The driver is running fine for it supports the backward compatibility, but I am unable to get the handle for my network device for the driver I have. I am trying to get the handle using the IoGetDeviceObjectPointer() function from another driver, But it always returns STATUS_NOT_SUPPORTED. What could be the reason for such behaviour? The same setup ( NDIS miniport driver and the other driver from which i am trying to get the NDIS handle ) works fine. Looking forward for your response..... Tag: Upper filter driver Tag: 86862
  - 21
    - Linker Error VS2005 Hello I am trying to link my driver. I am getting the below mentioned error error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@) If any body knows how can we resolve this please let me know regards rohit Tag: Upper filter driver Tag: 86857
  - 22
    - prefast I want to use prefast on my user mode c++ project. Has anyone tried this? I'm thinking of going to the trouble of building this project in a DDK build environment just so that I can run prefast on it ... it seems prefast only works correctly from a DDK build environment! Has anyone tried to integrate prefast with VS2005 for user mode projects? If not, can anyone suggest a free tool that is equivalent. Mirage2k2. Tag: Upper filter driver Tag: 86844
  - 23
    - IRP_MN_WAIT_WAKE concurrency The description of IRP_MN_WAIT_WAKE in the DDK says that it shouldn't be sent while any set-power or query-power IRP is active in the device stack. How is this usually done? A queue? Are all set-power and query-power IRPs, along with IRP_MN_WAIT_WAKE, supposed to be queued to be handled one at a time by a worker thread? (handling the specific device power IRP associated with the current system IRP immediately, of course, or there would be deadlock) I didn't get this impression from other parts of the documentation or from a glance at the "pcidrv" sample, but a queue is the only way I can think to do this (since a power IRP handler can't block waiting on any sort of lock). I thought I saw "pcidrv" doing this bare in a state-changing PnP handler, but if state-changing PnP IRPs were really mutually exclusive with power IRPs then the documentation shouldn't say to hold a remove lock while handling a power IRP (since there would be no need for a remove lock during a power IRP if a remove couldn't even happen during a power IRP). Tag: Upper filter driver Tag: 86831
  - 24
    - Wait/wake technicality There's a part of the DDK docs that says that "The IoCompletion routine should perform whatever tasks the driver requires to return the device to the working state." (referring to the IoCompletion set for a wait/wake IRP in "Handling a Wait/Wake IRP in a Function (FDO) or Filter Driver (Filter DO)") Shouldn't this technically only be the case for the power policy owner? Don't the other drivers in a stack just pass the wait/wake IRP back up and only return to the working state when a subsequent set-power IRP is received from the power policy owner? Tag: Upper filter driver Tag: 86830
  - 25
    - TTF Files I'm looking some source code in C to read TTF Files and print it. -- Mario Tag: Upper filter driver Tag: 86825
- Next
  - 1
    - How to inform system of DVI hot detect through video miniport driv Though what mechanism does a video miniport driver inform the OS that a screen has been attached (upon hot detect pin getting pulled high). Tag: Upper filter driver Tag: 86824
  - 2
    - Information about UMBus Hello, I am looking for information regarding the UMBus bus found in Vista. Couldn't find anything in the Vista WDK or SDK. Specifically, I am looking for information to match WPD devices to the correspoding hardware device. I suppose there are a few IOCTL that the bus driver implements, but they do not seem to be documented. TIA, John Tag: Upper filter driver Tag: 86820
  - 3
    - how to terminate an IRP Create operation correctly? I'm trying to prevent a certain file to be written anywhere in the filesystem. As far I understand, one can do that by terminating IRP Create (SpyCreate) when the file in question has been found with the following code: Irp->IoStatus.Information = 0; Irp->IoStatus.Status = STATUS_SUCCESS; IoCompleteRequest( Irp, IO_NO_INCREMENT ); return STATUS_SUCCESS; That code works fine when terminating eg IRP Writes but causes a BSOD when used in Create. Any suggestion how to terminate an IRP Create operation correctly? Your advice would be very much appreciated. Tag: Upper filter driver Tag: 86813
  - 4
    - DDK mirror driver sample I built and installed the mirror driver on a Windows XP (SP2) PC. The app exits immediately. The output seems to indicate it is running normally. I am not sure what is the expect behavior for this driver and app. Doesn't the app shows a windows on the second monitor that mirrors the first monitor? The code seems commented out in the sample. Could anyone point me to the documentation for mirror driver? Thanks, Tag: Upper filter driver Tag: 86810
  - 5
    - WinMobile 5 Driver Dev For USB to Serial Adapter Problem: Need to dev/deploy driver for USB to Serial (DB9) cable for WinMobile 5 (T-Mobile MDA).What I Have: Managed to get .000 and .001 files from chipset manuf.About me: Haven't done driver dev in years, am currently Sen Solutions Developer for British Telecom NYC. I Do: 3-Tier Ent. Solutions, Distributed Apps, SOA Solutions, ASP.NET/AJAX Web Apps, Hardware config and planning, data mang/OLAP, cust-access web sites. Just given management over Mobile Devices, have hard timeframe to complete. Any info on driver dev and deployment for Win Mobile 5 would be great, especially if I can incorporate the files given by the manuf. into solution (install pakage or manual install, whatever will work). Just given Mobile dept. am not familiar enough to meet timeline expected. Many thanks. Tag: Upper filter driver Tag: 86808
  - 6
    - Driver Dev for Win Mobile 5 I am having trouble creating the driver installation package for a USB to Serial adapter cable. The chipset manuf. has provided the .000 and .001 as unsupported files only. What I need to do is connect our PPC Phone Ed. devices (T-Mobile MDAs) to our telco switches/routers (VT100 emulator prog.) for diagnostics and basic config for our techs. Since the drivers for WinMob 5 are .dll, which is the best way to create an install package or manual indstall? I am a primarily a 3-Tier entrerprise application and SOA developer and have not had to write a driver for years. Additionall,y I have just been handed our mobile device dev./mang. and am under a tight schedule. Any info would be great. - S-Rez BT Americas NYC Sen. Solutions Developer Tag: Upper filter driver Tag: 86804
  - 7
    - Getting the "bus relations" of a device I have a webcan that is both appearing in the "USB controllers" and "Imaging Devices" sections in the Device Manager. How can I find the relations between the two drivers (in user mode). I have tried SetupDiGetDeviceRegistryProperty but it seems there is no unique property that I can use. One possible way would be to retrieve the "bus relations" of a device as displayed in the Device Manager->Device XXX->Details->Bus relations. But how ? Tag: Upper filter driver Tag: 86798
  - 8
    - WinDbg: extra blank line if timestamps enabled Moin, I noticed that if I enable timestamps in WinDbg 6.6.7.5 that there is an extra blank line printed for every call to DbgPrint(). Is this a bug or a feature ? If it is a feature how can I disable it ? Any clues ? Bis gleich ... Stefan Tag: Upper filter driver Tag: 86792
  - 9
    - How can I register multiple Coms via a virtual serial port driver? Hi friends, I have written a virtual serial port driver using a pair of bulk endpoint of USB. It can register a virtual COM symbol such as "COM3" in my computer. The driver function well using WIN32 applications. Now I have requirement to emulate 3 COMS at the same time in host computer via this pair of bulk endpoint. Questtions: 1.First I have to find a feasible way to register 3 COM symbol, they are symbolic link to FDO, how can I register them at the same time? 2.Only one PDO(physical device object) is created by lower USB driver , then I have to register 3 FDOS(functional device object) , fatal error occured when I attach them to PDO using IoAttachDeviceToDeviceStack(), How can I deal with it? 3. Is there any sophisticated virtual driver sample for my requirement? Waiting for expert's comments. All your comments are welcome. Thanks in Advenace, Conan Tag: Upper filter driver Tag: 86790
  - 10
    - ReInvoking MiniportInitialize from protocol driver Hi experts, I want to make Ndis call (reinvoke) my MiniportInitialize from protocol driver. This has to be done without removing and reinserting my device. First iam trying to make Ndis to call my MiniportHalt & then recall MiniportInitialize. Any suggestion welcome Thanks in advance Tag: Upper filter driver Tag: 86786
  - 11
    - PCI express payload mystery We have got our WDF driver up and running with an 8 lane PCI express card. It uses hardware DMA scatter gather and appears to be working well. However we are only getting about 50% of the theoretical bandwidth over 8 lanes (1GB/s instead of 2GB/s). Unfortunately we need to hit around 60%. The 50% doesn't include driver overhead and is measured by the hardware during the transfer. One of the main factors that can affect PCI express efficiency is the payload size. From what I have read the maximum payload is 4k which is supposed to give near to 100%. For 128 byte payloads with an estimated application overhead it's around 55%, and for 64 bytes it is around 40%. On our AMD platform as we are not measuring the overhead, it is feasible that we're getting 64 byte payloads (our card supports 4k). A few things we have noticed so far: ATI X1900 XT has a maximum payload size of 128 (according to SiSoft tool) Intel 965 chipset has a maximum payload size of 128 (according to the data sheet). Here are a couple of questions I hope someone can shed some light on: 1) On an AMD system PCI express is interfaced by HyperTransport which is packet based, and has a maximum payload size of 64 bytes. Does this mean its PCI express interface is also limited to 64 byte payloads? 2) Does anyone know of a motherboard chipset that supports large payloads (4k)? Apologies if this is slightly off topic, but I guessed it is something that will affect anyone writing a PCI express driver. Tag: Upper filter driver Tag: 86785
  - 12
    - SCard reader driver is not getting registered properly hence not I have modified the ddk sample for smart card reader, pscr to support the PCI interface. I installed smart card reader driver i could able see my driver details in the registry (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MySmartreader). But, Smart Card Subsystem is not recognizing my reader, that means he is not adding my registry details to (HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\calais\Reader) . I have a GEMPLUS Serial reader hardware and .sys file, which is installing and passing driver details to above registry with my inf file (with their device and vender ID). So, I think my driver initialization is not proper in the driver, I have updated all the mandatory parameter in the SMARTCARD EXTENSION Structure. What else need to be done to make my reader driver visible to the resource manager. Regards Esha Tag: Upper filter driver Tag: 86782
  - 13
    - AddPrinterDriver failed. Hi friends, I have used DRIVER_INFO_3 with AddPrinterDriver API to install my printer driver manually. In 32 bit OS its working fine. But in 64 Bit versions (windows Xp x64) I am getting an error message saying that "The system cannot find the path specified". (ERROR_PATH_NOT_FOUND =3). But the printer driver path is retrieved through "GetPrinterDriverDirectory" API only. Even I tried with direct addressing also.(c:\windows\system32\x64\spool\drivers\3...).But in both methods Iâ??m getting the same error message. Please suggest me how to come out from this problem. Thanks, Shankar B Tag: Upper filter driver Tag: 86780
  - 14
    - EMF I grant to you I m a bit confused about the workflow during a print job. Where is the best place to catch the EMF Output ? I did it now in the printprocessor trough copying the Spoolfiles. But they may a better place or a more fashionable solution. What's about catching the EMF-Commands in the printdriver or is it better to use a portmonitor ? I want to use it to catch output from vector-graphic programs. Until now I saw the best results if I choose a Plotter as Output device. Has anybody any sugesstions ? Thomas Tag: Upper filter driver Tag: 86778
  - 15
    - Why happen "found new hardware" ... Why happen "found new hardware" dialog after clicking uninstall the card in the device manager on vista? It seems automatically scanning. My vista version is 5600. Can anybody help me? Thank you. Tag: Upper filter driver Tag: 86777
  - 16
    - virtual disk driver - write a volume header I am writing a virtual disk driver which uses a file as a virtual disk. The disk file can be mounted with a drive letter and normally used. Internally, ZwReadFile and ZwWriteFile in the dispatch routine for IRP_MJ_READ and _WRITE do the job to write on and read from "disk". As far, everything works fine. Now, I would like to write a volume header sector at the beginning of the disk file. This volume header sector should not be formatted by e.g. the windows format command. It should be ignored by any write operation on the disk file. I think I have to modify the StartingOffset in the VERIFY_INFORMATION when IOCTL_DISK_VERIFY comes down and shift as well the offest of IRP_MJ_WRITE to save this special sector for overwriting? Until now, e.g. the windows format begins at StartingOffset 0 and thus, overwrites my volume header sector which was previously written when the disk file was created. Any help would be gratefully appreciated. More info can be provided if applied. Tag: Upper filter driver Tag: 86775
  - 17
    - MS toaster sample and driver signing When a new toaster device is plugged-in ( using command: enum.exe â??p 1 ) device Setup pops-up a warning that the driver is not properly signed. Question 1. If I use remote desktop the warning message is displayed not on my screen but on the primary or main screen and is not visible to me. I have to login from a monitor which is physically connected to the machine where toaster software runs in order to see this warning dialog and continue the driver installation. Any suggestions how to deal with this problem without passing WHQL tests? The workaround known to me is: go to Device Manager, find the newly created toaster device, select Update Driver and go through the installation process from the very beginning. Question 2. After installing the driver for toaster device number 1 I want to add toaster device number 2. Same warning message pops-up again. I already approved the driver installation for device number 1 and device number 2 will use the same driver. How to avoid the warning if the driver has been previously installed for another device? Tag: Upper filter driver Tag: 86773
  - 18
    - How to not show "Hardware Installation" Dialog when install driver? Hi all, When i use command line "devcon install mobicap.inf mobicap" to install driver, it displayed a dialog to ask user for installing. I want to control this? Help me, thanks. Tag: Upper filter driver Tag: 86764
  - 19
    - NDIS Version question. Looking at the sources file for passthru example im driver in the 2003 ddk, it is evident that for a w2k build ndis 4.0 will be used and for xp/2003 ndis 5.1 will be used. I just spent some time researching the different versions of ndis and its seems ndis 4.0 is real old and ndis 5.0 was introduced in w2k. Why then does passthru want to be built using ndis 4.0 for w2k and not ndis 5.0? The sources file looks like this ... !if "$(DDK_TARGET_OS)"=="Win2K" # # The driver is built in the Win2K build environment # C_DEFINES=$(C_DEFINES) -DNDIS40_MINIPORT=1 C_DEFINES=$(C_DEFINES) -DNDIS40=1 !else # # The driver is built in the XP or .NET build environment # So let us build NDIS 5.1 version. # C_DEFINES=$(C_DEFINES) -DNDIS51_MINIPORT=1 C_DEFINES=$(C_DEFINES) -DNDIS51=1 !endif I am tempted to change it to ... !if "$(DDK_TARGET_OS)"=="Win2K" # # The driver is built in the Win2K build environment # C_DEFINES=$(C_DEFINES) -DNDIS50_MINIPORT=1 C_DEFINES=$(C_DEFINES) -DNDIS50=1 !else ... Can anyone help me out here? Tag: Upper filter driver Tag: 86760
  - 20
    - PoRequestPowerIrp cancel race? Isn't it a race for the sender of a power IRP to call IoCancelIrp on an IRP allocated by PoRequestPowerIrp, because the IRP may have already been completed and then freed by the power manager before IoCancelIrp tries to access the memory it may no longer occupy? Tag: Upper filter driver Tag: 86754
  - 21
    - removable drive type versus local drive type I am looking for information on how Windows handles removable drives versus local drives at the driver level. For example, it seems that a polling mechanism exists for removable drives that can effect performance that does not exist on local drive types. I am trying to determine the differences between the two drive types from the Windows point of view. Tag: Upper filter driver Tag: 86745
  - 22
    - DDKVersion.xml ? The 5744 WDK setup put this file in c:\winddk - what is the purpose? Regards, --PA Tag: Upper filter driver Tag: 86743
  - 23
    - Is there any difference w.r.t updating drivers between 56xx and 57xx Vista builds? Hi, Updating ITB device driver on 57xx Vista builds is not going through smoothly. Is there any difference b/w 56xx and 57xx Vista builds? Has anyone seen similar problems? Thanks, -Praveen Tag: Upper filter driver Tag: 86742
  - 24
    - WDF Class Filter Driver Installation Hi, I was wondering if anyone had experience installing a CLASS filter driver on an already existing setup class. I have found limited resources on the subject (at least for a class filter driver), and I haven't found anything on msdn on how to install a class filter driver with WDF. Their link points to here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devinst_d/hh/DevInst_d/specinst_708d78ad-ba66-40a0-946a-a0bb261e8a8a.xml.asp which directs you to use an app to do the following: 1. Call SetupInstallFilesFromInfSection for the [upperfilter_inst] section. 2. Call SetupInstallServicesFromInfSection for the [upperfilter_inst.Services] section. 3. Call SetupInstallFromInfSection for the [upperfilter_inst] section, once for each class key it wants to register the upperfilt service for. However, I think WDF is a different beast as it requires the wdfcoinstaller to install the runtime. So I am not sure if this method is what I should do (and besides it didn't work). So, I found from osronline that with wdf we are supposed to use WdfPreDeviceInstall and WdfPostDeviceInstall. How do these fit in with a class filter driver? >From what I understand, I can use those functions along with CreateService to install my filter driver's service, but what about registration? As far as I know step 3 in the older documentation says to use SetupInstallFromInfSection to register the class filter driver. Does that only add the "UpperFilters" value to the class key in the registry? Does it do anything else? When I tried to use it I didn't see any entry appear Any help on how to install a class filter driver using the WDF/KMDF would be much appreciated. Thanks! Tag: Upper filter driver Tag: 86737
  - 25
    - Block files at driver level? Hi, I'd like to write a driver that blcoks all write access to a certain directory (unless it comes from a binary that I wrote). I want this to occur at the driver level, but is this even possible? Thanks for any advice! Tag: Upper filter driver Tag: 86734

i had created lower filter driver for USB Hub. and i am able to get
IRPs and URBs easily. Then i made same filter driver as upper filter
driver but when i plug mass storage device then bug check error comes.
Can anybody tell me what problem had i done.. what can be my mistake in
it.. any sample code for upper filter driver for USB Hub.

Thanks in Advance
Chandrakant

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