Shared Memory between User app and Driver

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  - 1
    - 1394 async broadcast I want to send a 1394 Async broadcast packet (nodeId = 0xFFFF) using Micorsoft Windows stack. But didnt find the way to do it. DDK for REQUEST_ASYNC_WRITE says " The driver only must fill in the IA_Destination_Offset member of u.AsyncWrite.DestinationAddress; the bus driver will fill in the IA_Destination_ID member ". Since I have no say on nodeId, I dont know how to a Async block request as broadcast packet of nodeId 0xFFFF. Do I need to send to all nodes, one node at a time and "feel" like I broacasted. Any help appreciated. Tag: Shared Memory between User app and Driver Tag: 27787
  - 2
    - symbolic link and IoGetDeviceObjectPointer Hello all, I have a problem with drivers calling each other. There are 3 drivers. Two of those drivers need to ask driver nr 1 some things. Nr 1 does the following in his AddDevice method: RtlInitUnicodeString(&devname, L"\\Device\\NAME"); RtlInitUnicodeString(&win32DeviceName, L"\\DosDevices\\NAME"); IoCreateSymbolicLink( &win32DeviceName, &devname); Nr 2 and 3 then try: RtlInitUnicodeString(&devName, L"\\Device\\NAME"); status=IoGetDeviceObjectPointer(&devName, FILE_ALL_ACCESS, &fileObj, &devObj); The problem is that nr 2 does this first (but definitely after the addentry method of nr 1), but always gets c0000e as error code (device not found). Nr 3 first has to load some files and asks stuff to nr 1 later (and he IS successfull). In other words: there seems to be a delay between the IoCreateSymbolicLink and the time when the driver can actually attempt to get a handle to it. (Note: I'm a newbie, so forgive me if I say stupid things :-) Is this true? Can I alter the loading order, so nr 2 is called after nr 3 (I don't think so, both are PnP drivers and I think I read you can't specify a load order)? thx in advance for all help, crimson13 Tag: Shared Memory between User app and Driver Tag: 27783
  - 3
    - WHERE TO FIND THE DDK? PRINTERS DDK? I need a copy of the DDK, particularly for printers. It provides stuff like code for localspl.dll. MS does not provide this on the web-site. Anyone know where I could find this? Even better, any chance I could get it emailed? My driver development for the printer is pretty advanced (have written a port monitor), but I cannot progress without the DDK. Tag: Shared Memory between User app and Driver Tag: 27779
  - 4
    - Wakeup problem with PCMCIA card I am writing a WDM driver for a simple PCMCIA card and testing it under Windows 2000/SP3. The driver is based on a framework created with Walter Oney's WDM Driver Wizard. In particular, the Power handling functions are more or less unchanged. My problem is, that when the system wakes up from standby mode, Windows thinks that the hardware has changed and starts the New-Hardware-Wizard. The driver appears to complete the processing of the power IRPs, but then receives a IRP_MN_SURPRISE_REMOVAL request, following which the driver is unloaded. The New-Hardware-Wizard indicates that it has detected a device named MTD-0002. I have been advised that this probably means that Wihdows is unable to read the Card Information Structure (CIS) on the PCMCIA card, but I can see no reason why this would be the case. I have set D3Latency parameter to 1000 (100ms) which should be more than enough. On inserting the card into the slot, Windows never has any difficulty reading the CIS, so I don't see why there should be a problem when it is powered up on leaving standby mode. Does anybody have any idea what could be causing this effect? I would be grateful for any help. Thanks in advance Phil (By the way, this is newly developed hardware and the error could be in the CIS. It is not a big problem for us to reprogam this memory.) Tag: Shared Memory between User app and Driver Tag: 27775
  - 5
    - how to display bitmap on screen constantly? Hi, I'm trying to find a way to display a bitmap on the top- right portion of the screen at all times, even when an application using directx in full-screen mode is in use. Can this be accomplished using display filter drivers? I was thinking of writing a driver that would simply map the bitmap data to the screen along with the rest of the screen data. So, could a filter driver be installed "below" GDI and Directx that would map the bitmap regarless of wich interface(gdi or directx) is in use? And if so, since GDI and directx are different components that each communicates directly with the video adapter (as I understand it), will the driver have to be device specific? Anyway, if u guys know a way to accomplish this bitmap mapping whitout using drivers i'll be more than happy to hear it. Tag: Shared Memory between User app and Driver Tag: 27768
  - 6
    - WMI support for Stream minidriver Hello, All. Does anybody knows how to implement WMI support in the StreamMinidriver for KernelStreaming. -- Andrey Tag: Shared Memory between User app and Driver Tag: 27766
  - 7
    - PCI Configuration Space - BAR0 Allocation Hi, Who is responsible to provide IO Address at BAR0 in PCI Configuration Space : Operating System or Device Driver ? If OS provides that, can device driver change this ? or does driver needs to change this to allocate new IO range under conflicts ? Thanks & Regards, rsec07 Tag: Shared Memory between User app and Driver Tag: 27756
  - 8
    - How to install NT4 driver by setup program I can use inf file to install a "SCSIAdapter" driver on NT4. However, I want to implement setup program(InstallShield) to install driver. Except copy *.Inf and *.sys to \\WINNT\\INF and \\WINNT\\SYSTEM32\\DRIVERS, what application I need to execute to install driver successfully? Thanks Axel Tag: Shared Memory between User app and Driver Tag: 27749
  - 9
    - Enable/Diable Device Driver from Non-Admin account In our Video Conferencing systems, we have multiple propritary drivers running on the system and also our system works with different third party Conferencing Devices. Obviously differnt drivers for variety of HW devices are running on the same system. Our recent version of HW is getting problems with one of HW that is colloborated with our unit. Then I played with different drivers and finally I found a way to make it work. Disable the HW unit driver before reboot and enable after the system booted completely using Windows ddk api from one of test app. But the Microsoft documentation is expalaining that these APIs for Enable/Disable, SetupDiChangeState, is only for Administrator group. Is there any way to disable / Enable the Drivers when we login as a Non-Admin also. Can somebody to help to solve this problem. If I am following the wrong way, Can you update me the proper way to solve this issue. Thank You Murthy Tag: Shared Memory between User app and Driver Tag: 27743
  - 10
    - sub-optimal performance through CardBus controllers on Windows Problem Statement - The Windows XP and 2000 driver in the OS for CardBus controllers are not programmed for optimal throughput or performance. Observations - We have a Network adapter that runs roughly the same speeds as a Fast Ethernet NIC. - We can sustain data rates in the Tx and Rx directions (simultaneously) of roughly 80Mbps through the NIC and Ndis driver across PCI. - When running through a Cardbus controller programmed by Windows (with the Windows provided Cardbus controller drivers) we see Rx rates of approximately 78 Mbps. Tx rates top out at roughly 38 Mbps. - We have noticed that the Cardbus bridge is NOT programmed for optimal performance, even though the PCI configuration space shows settings that the CardBus controller driver seems to be ignoring. For example, burst read and write were set in the PCI config space for the card (MBURSTDN and MBURSTUP) but the CardBus controller is NOT programmed to burst by the Windows OS CardBus controller driver. - When we manually change the cardbus controller to enable bursting, the Tx performance improves dramatically. Questions. 1. Can the Network card do anything to influence the Windows Cardbus controller driver to enable Burst read and write ? 2. Are there other settings the Network card can use to ensure the Cardbus controller is set for optimal performance? 3. The Fast Ethernet NICs must have run into this same problem already. We see that that off the shelf Fast Ethernet NICs also are not running anywhere near optimal performance / throughput. We see simliar rates for Tx and Rx on with Fast Ethernet Cardbus NICs. We can program the CardBus controller maually to dramtically improve the performance but we still do not see what we would expect (90+ Mbps in both directions). Below are some detailed notes about our investigation and characterization of the problem. We are doing performance characterization on our Cardbus NIC, which has a PHY throughput roughly equivalent to a Fast Ethernet NIC (approximately 100 Mbps simultaneously for Tx and Rx). But, we are seeing some performance issues, while transferring data across the Cardbus interface. We have not been able to get the Cardbus interface, on any laptop to transmit data at rates higher than 37 Mbps and receive data across the Cardbus interface at rates higher than 78 Mbps. Also, there are some laptops where the upstream througput is as low as 3 Mbps and the downstream throughput only 7 Mbps. The throughput seems to vary with the part no. of the Cardbus Controller, being used in the laptop. Following is a list of observations that we made while running the tests, with each laptop: 1. Sony Vaio Laptop running Win2k with RICOH 5c475 II Cardbus controller: This laptop showed a throughput of 37 Mbps upstream and 78 Mbps downstream, when we transfered data at roughly 100 Mbps at the PHY layer. 2. Dell Latitude laptop running WinXP with the TI PCI-1420 Cardbus controller: This laptop showed a throughput of 37 Mbps both upstream and downstream, when we transfered data at roughly 100 Mbps at the PHY layer. 3. IBM Thinkpad running WinXP with the TI PCI-1510 Cardbus controller: This laptop showed a throughput of just 3 Mbps upstream and 7 Mbps downstream, when we transfered data at roughly 100 Mbps at the PHY layer. When we monitored the Cardbus transactions on a logic analyzer, we saw that although the controller was allowing DMA bursts, it was issueing a lot of retries, to the device. 4. If we replace the NIC with an out of the box Fast Ethernet NIC, we see strikingly similar numbers in all cases. All the above setups are running the standard Cardbus controller drivers which came with the Operating System and we are running standardout of the box NDIS Miniport drivers, to drive our NIC. So, the question is, how can we get the Cardbus controller drivers on each platform and OS, to configure the controller correctly, to allow maximum throughput across the Cardbus interface ? Programming the TI Cardbus controller manually Since, the datasheets for the RICOH controllers, are not available online, we looked at the Cardbus configuration registers, of only the TI controllers. Following was the default configuration on both the TI controllers on the WinXP laptops: 1. The MBURSTDN and MBURSTUP bits (bits 15 and 14) were set in the System Control Register (PCI Config space offset 80h), for bursts, both for Read and Write transactions. 2. The POSTEN bit (bit 10) in the Bridge Control Register was set, enabling write posting, which is recommended for good performance while bursting. 3. The Latency Timer settings are different on the controllers: TI Controller Latency Timer Cardbus Latency (Secondary Bus Latency) PCI-1420 20 20 PCI-1510 40 B0 4. The KEEPCLK bit (bit 1) in the System Control Register was cleared, which implies that usage of the CLKRUN protocol was enabled, although we implement the CCLKRUN# pin as a NO-CONNECT on our device, since it was decided not to support this protocol. I tried running the tests, after toggling this bit, so that the Cardbus clock is always kept active and is not throttled using the CLKRUN# protocol, but that did not improve the performance, in any way. 5. The PCIRETRY and CBRETRY bits (bits 7 and 6), in the Retry Status Register, are set, indicating that PCI and Cardbus retry timeout is enabled. Following was the configuration of our device: MIN_GNT = 18 MAX_LAT = FF Latency Timer = F8 While running WinXP, we got a similar low throughput of 19 Mbps. Subsequently, looking at the Cardbus Controller registers and we found that again the MRBURSTUP bit was not set by the XP CB controller driver. So, after setting this bit, manually, I was able to acheive an upstream throughput of 51 Mbps. This strongly suggests that the Microsoft WinXP Cardbus controller drivers are not optimized setting the Controller hardware for optimum performance basedon the parameters of the CardBus cards plugged into the bridge. We are wondering if other NIC vendors would have run into the same issues on Windows and got some fixes from Microsoft. Following, we were able to achieve a new performance high on our Cardbus NIC using the Dell Latitude laptop with the TI PCI-1420 Cardbus controller. We were able to acheive 46 Mbps upstream and 79 Mbps downstream, while trying to transmit packets at roughly 100 Mbps. So, we are almost at par with the Cardbus Fast Ethernet performance, seen on the various laptops. The differences this time are: 1. This NIC is programmed with a new EEPROM image which programs the PCI MIN_GNT, MAX_LAT and the latency timer to values optimized for the maximum throughput. 2. Before we started this test, we made sure that the PCI latency timer values on all the intermediate PCI-PCI bridges and PCI-Cardbus controller, was set to the max possible value of 0xF8 (since I found that the latency timer values on some of the intermediate bridges was set to zero, by default, which might have inhibited the Cardbus performance). --- Larry Cawley Airgo Networks, Inc. 636 458 1462 <mailto:LarryCawley@AirgoNetworks.com> Tag: Shared Memory between User app and Driver Tag: 27741
  - 11
    - Register NDIS driver to set device name Hi I have access to NDIS miniport driver code - I want to communicate to it from a user app. I was attempting to register the device using NDISMRegister Device so that I could give it a device name and be able to access it. But that crashes my system. Can NDISMRegisterDevice be used with NDISMRegisterMiniport without crashing the driver? Can I retrieve device names without having to register the device ? I want to create a shared memory interface with the driver using an IOCTL and am a novice to device driver programming - hence the questions. Thanks in advance Brinda Tag: Shared Memory between User app and Driver Tag: 27732
  - 12
    - CM_PROB_DRIVER_FAILED_PRIOR_UNLOAD I run into this error only under HCT (WHQL). But the interesting point is that 1) I handle IRP_MN_REMOVE_DEVICE successfully. 2) When my Unload gets called, !drvobj shows that the driver object owns no devices. But even after my Unload routine exits, !drivers shows that the module is still loaded. What could keep a module from unloading after return from driver unload? regards, m navab Tag: Shared Memory between User app and Driver Tag: 27728
  - 13
    - How to differ the different network in protocol driver(802.3,802.11) when i made the coding for the wireless lan in protocol driver. i found, no matter how i improve my coding or not, the information of medium i got is still 802.3, instead of 802.11. i know this why. but i should base the medium to use relative OID. So, who can tell me how to differ these two netowrk (802.11,802.3)in protocol driver Tag: Shared Memory between User app and Driver Tag: 27726
  - 14
    - IRQL_NOT_LESS_OR_EQUAL Why could this code crash with "IRQL_NOT..."? NTSTATUS USBBase::StartDataUrb(IN UCHAR data[4]) { NTSTATUS status = STATUS_SUCCESS; // Initialize the URB we use for writing the pipe PURB urb = this->DataUrbMidi01; USBD_PIPE_HANDLE Handle = this->MidiOut01; ULONG urbflags = USBD_SHORT_TRANSFER_OK; ULONG size = 4; PUCHAR Data = data; if (this->FirstStart) { Data = ACTIVATION; this->FirstStart = FALSE; } UsbBuildInterruptOrBulkTransferRequest(urb, sizeof (_URB_BULK_OR_INTERRUPT_TRANSFER), Handle, Data, NULL, size, urbflags, NULL); PIRP Irp = this->DataIrpMidi01; PIO_STACK_LOCATION stack = IoGetNextIrpStackLocation(Irp); stack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL; stack->Parameters.DeviceIoControl.IoControlCode = IOCTL_INTERNAL_USB_SUBMIT_URB; stack->Parameters.Others.Argument1 = (PVOID) urb; Irp->Cancel = FALSE; ASSERT(KeGetCurrentIrql() <= DISPATCH_LEVEL); status = IoCallDriver(lowerDO, Irp); !!! At this point!!! return status; } Because of debug messages (code is deleted here) I know the moment of system crash. It has to be somewhere in or slightly after IoCallDriver(...). The routine is called at passive level. I'm thankfull for any suggestions. Tag: Shared Memory between User app and Driver Tag: 27723
  - 15
    - How to write device installer? Hi, I'm in trouble. I have to write an installer for a modem, but have no idea how to do that. I've tried to execute *.inf files from driver's directory, but this didn't work. Could you please advise me how to do that or point me to some tutorials? Should I use some SetupDi methods? Thanks, K. Tag: Shared Memory between User app and Driver Tag: 27722
  - 16
    - About NUmega KStreamSocket HI: Everyone, A Problem about KStreamSocket make me very bored. It is So: When i create a socket via KStreamSocket. and connect to peer is ok,then send is ok. and receive is ok once,But once receive is finished. unfortunately,the socket is disconnect automatically. So, I have to connect it to peer again. Why,What is problem? Can you help me? Jerry Tag: Shared Memory between User app and Driver Tag: 27713
  - 17
    - TextOut Hello , I have a strange problem which I have encountered in my code ,The DrvTextOut Method of my driver fails when tested with speedy , on further debugging I found out that it fails in the pcfallocatecachedFont method and at these lines // swap a cached font (using LRU method) pFCNode = ppdev->pFC->pUsedList.pPrev; //Change status into uncached pFCNode->pfo->pvConsumer = NULL; //clear glyph tag pjFCTag = (PBYTE) pFCNode->pjTag; for (i = 0; i < FC_MAX_GLYPH_ID; i += 4) { *(PULONG) pjFCTag = 0; pjFCTag += 4; } //for Now the problems are as follows: 1.The driver doesn't break at the same position all the time sometimes it breaks in the for loop some times just after the font is swapped .it also doesn't break for a specific font id it just breaks randomly. 2.The same driver is working fine with speedy on a Pentium 4 machine with 256 mb ram whereas the orignal machine is intel celeron with 196 mb ram. Now my doubts are : 1.Can this be because of the CPU speed , I think it might be a swapping problem because it is giving me a page fault in non paged area.if it is how can I make changes in the code to make it compatiable for the celeron platform. 2.The replacement algorithm I have used is incorrect,I should not use LRU . Please advise , as I am not clear if I am on right tracks.for further refrece I am attaching the pcfAllocatecachedfont method. Thanks & Regards, Nitin Kapoor PFCNODE pcfAllocateCachedFont( PDEV* ppdev) { ULONG i; PFCNODE pFCNode; PBYTE pjFCTag; pFCNode = ppdev->pFC->pFreeList; if (pFCNode == NULL) { if (ppdev->pFC->pDiscardList != NULL) { ppdev->pFC->pFreeList = ppdev->pFC->pDiscardList; ppdev->pFC->pDiscardList = NULL; pFCNode = ppdev->pFC->pFreeList; while (pFCNode) { //set the state into FC_FREE pFCNode->iState = FC_FREE; //clear glyph tag pjFCTag = (PBYTE) pFCNode->pjTag; for (i = 0; i < FC_MAX_GLYPH_ID; i += 4) { *(PULONG) pjFCTag = 0; pjFCTag += 4; } //for pFCNode = pFCNode->pNext; } //while // wait engine idle vWaitEngineIdle( ppdev ); // take the 1st free node pFCNode = ppdev->pFC->pFreeList; ppdev->pFC->pFreeList = pFCNode->pNext; pFCNode->iState = FC_USED; } else { // swap a cached font (using LRU method) pFCNode = ppdev->pFC->pUsedList.pPrev; //Change status into uncached pFCNode->pfo->pvConsumer = NULL; //clear glyph tag pjFCTag = (PBYTE) pFCNode->pjTag; for (i = 0; i < FC_MAX_GLYPH_ID; i += 4) { *(PULONG) pjFCTag = 0; pjFCTag += 4; } //for //delete from used list vFCDeleteNode(pFCNode); DISPDBG((0,"FONT CACHE AFTER DELETE NODE.\n",pFCNode->iUniq)); // wait engine idle vWaitEngineIdle( ppdev ); DISPDBG((0,"FONT CACHE After WaitEngine Idle.\n",pFCNode->iUniq)); } //if-else } else { pFCNode->iState = FC_USED; ppdev->pFC->pFreeList = pFCNode->pNext; } //if // keep double links for insert & delete vFCInsertNode(&ppdev->pFC->pUsedList, pFCNode); return(pFCNode); } //pcfAllocateCachedFont( Tag: Shared Memory between User app and Driver Tag: 27710
  - 18
    - why it doesnt work?????? i have got OID_802_11_STATISTICS's value and i can display correctly, i put the follow function in the OnTimer event. however, all of the value(transmitCount and receiveCount) i got is zero.(my thought is to display the number of transmit and received packages looks like the network status) void OnTimeer(XXXXX) { IoctlNdisQueryTest(lpAdapterName) } DWORD IoctlNdisQueryTest(LPCTSTR lpAdapterName) { NDIS_802_11_STATISTICS OidData; DWORD nResult, ReturnedCount = 0; ZeroMemory( &OidData, sizeof(OidData)); OidData.Length = sizeof(OidData); nResult = Test_IoctlNdisQueryGlobalStats (lpAdapterName,OID_802_11_STATISTICS,OidData,sizeof (OidData),&ReturnedCount); if( nResult != ERROR_SUCCESS ) sprintf(sLabel,"%s","The driver unsupported"); else sprintf(sLabel,"%I64d,%I64d", OidData.TransmittedFragmentCount.QuadPart, OidData.ReceivedFragmentCount.QuadPart); Tag: Shared Memory between User app and Driver Tag: 27708
  - 19
    - kernel driver refuses to run in safe boot I'm trying to write a very little SERVICE_KERNEL_DRIVER driver, which is supposed to run during safe boot. My current driver is as good as empty, I can successfully start & stop it during a normal (non safe) session. Also it boots up in a normal (non safe) session when being installed as SERVICE_SYSTEM_START. Everything looks just fine. But during safe boot XP suddenly is not able to load the driver. It tries to load it (I've added it to the safe boot registry keys), but it fails. The XP event log sais, XP was not able to load my driver, but it doesn't tell me why. If I check out the properties page of my driver (via device manager) after a safe boot I can see that it is not running. If I then try to manually start it, the dialog freezes for about 5 seconds, but the driver still does not run. What do I have to change to make my driver run successfully in a safe boot? Thanks! P.S: I tried to add power, pnp and wmi handlers, but that didn't help, either. Maybe I implemented them incorrectly, though. ============================================================ #include <ntddk.h> void UnloadDriver(PDRIVER_OBJECT DriverObject) { IoDeleteDevice(DriverObject->DeviceObject); } NTSTATUS DummyIrpHandler(PDEVICE_OBJECT DeviceObject, PIRP Irp) { Irp->IoStatus.Status = STATUS_SUCCESS; IoCompleteRequest(Irp, IO_NO_INCREMENT); return STATUS_SUCCESS; } NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath) { PDEVICE_OBJECT devObj; UNICODE_STRING name; RtlInitUnicodeString(&name, L"\\Device\\MtsUpd"); IoCreateDevice(DriverObject, 4, &name, FILE_DEVICE_UNKNOWN, 0, FALSE, &devObj); DriverObject->DriverUnload = UnloadDriver; DriverObject->MajorFunction[IRP_MJ_CREATE] = DummyIrpHandler; DriverObject->MajorFunction[IRP_MJ_CLOSE] = DummyIrpHandler; return STATUS_SUCCESS; } Tag: Shared Memory between User app and Driver Tag: 27707
  - 20
    - scsi miniport HwStartIo() IRQL if no interrupts in a scsi miniport driver for a virtual HW(obviously no HW interrupts), if i set the PORT_CONFIGURATION_INFORMATION -> BusInterruptVector = 0; for findadapter and HW_INITIALIZATION_DATA -> HwScsiInterrupt = NULL can i be gauranteed that my HwStartIo() and/or HwTimer()will be called at DISPATCH_LEVEL(atleast)/PASSIVE_LEVEL? because i cant think of what DIRQL can SCSIPORT assume before calling into me? KeSynchronizeExecution() requires interrupt# question 2 ------------- since HwStartIo() can be called at DIRQL what syncronization mechanisms are available inside this routine to share data with a PASSIVE_LEVEL thread? even spinlocks are useless > DISPATCH_LEVEL. i am prepared to use any NTDDK only kernel functions thx alex Tag: Shared Memory between User app and Driver Tag: 27705
  - 21
    - WinDDK Fails to Build Examples I've installed the winddk 3790, read the release notes and getting started guide, and attempted to build the examples but I've had no luck-- the build is silently failing. Executing 'build -cZ' from the command prompt spawned by "Windows 2000 Checked Build Environment" rapidly scrolls through all the example directories (much too fast to be building) and exits without errors. If I look into an example (i.e. src\general\portio) at the build log file, I see entries like the following: > Compiling c:\winddk\3790\src\general\portio\sys directory ************* > 'nmake.exe /c BUILDMSG=Stop. -i NTTEST= UMTEST= NOLINK=1 NOPASS0=1 386=1' > Bad command or file name Any ideas? The log output is identical for every example driver in the DDK. I'd expect building examples to "just work" but I'm not familiar enough with this environment to even begin to guess what is wrong. It should be mentioned that I had this exact error mode using a previous Win2K DDK, so I elected to grab the latest 2003 Server DDK in the hopes that the integrated compiler, etc, would make the effort easier. Tag: Shared Memory between User app and Driver Tag: 27702
  - 22
    - About ClearCommError function everyone: Hi I am writting a driver about a virtual device. While application calls ClearCommError, The Driver must be able to reply a response. Now I dont know when driver receives the ioctl code,what is the SystemBuffer of IRP? and More, if app calls other API(WaitCommEvent,SetCommMask,etc.) What is Their SystemBuffer? Thank for your answer. Jerry 1st.July.2003 Tag: Shared Memory between User app and Driver Tag: 27697
  - 23
    - Get the long form of the specified path. Hi Is it possible to get the long path name of a specified path from the short form of the path? In win32 there are functions named 'GetLongPathName' or 'GetFullPathName' to achieve it, but what to to in a driver? thanks Yang Liu Tag: Shared Memory between User app and Driver Tag: 27693
  - 24
    - Where is wrong? the follows is my coding, who can tell me where is wrong, and how to correct it? DWORD myinfo::IoctlNdisQueryTest(LPCTSTR lpAdapterName) { UCHAR OidData[4096]; DWORD nResult, ReturnedCount = 0; nResult = Test_IoctlNdisQueryGlobalStats (lpAdapterName,OID_802_11_STATISTICS,OidData,sizeof (OidData),&ReturnedCount); if( nResult != ERROR_SUCCESS ) sprintf(sLabel,"%s","The driver unsupported"); else /* ****************************************** */ sprintf(sLabel,"%d,%d",OidData[1],OidData [10]);// wrong message /* ******************************************* */ m_temp.SetWindowText(sLabel); nResult = Test_IoctlNdisQueryGlobalStats (lpAdapterName,OID_802_11_SSID,OidData,sizeof (OidData),&ReturnedCount); if( nResult != ERROR_SUCCESS ) sprintf(sLabel,"%s","The driver unsupported"); else /* ***************************************** */ sprintf(sLabel,"%d-%s",OidData[],OidData [1]);//wrong message /* ****************************************** */ m_temp.SetWindowText(sLabel); return( nResult ); }DWORD myinfo::Test_IoctlNdisQueryGlobalStats( LPCTSTR lpAdapterName, ULONG OidCode, PVOID InformationBuffer, UINT InformationBufferLength, PULONG pBytesWritten) { CHAR LinkName[512]; CHAR szMACFileName[512]; BOOLEAN bCreatedDevice = FALSE; DWORD ErrorNumber, nResult = ERROR_SUCCESS; HANDLE hMAC; *pBytesWritten = 0; strcpy( LinkName, "\\Device\\" ); strcat( LinkName, lpAdapterName ); strcpy(szMACFileName, DEVICE_PREFIX); strcat(szMACFileName, lpAdapterName); hMAC = CreateFile (szMACFileName,0,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,INVAL ID_HANDLE_VALUE); if (hMAC != INVALID_HANDLE_VALUE) if(!DeviceIoControl (hMAC,IOCTL_NDIS_QUERY_GLOBAL_STATS,&OidCode, sizeof (OidCode),InformationBuffer,InformationBufferLength, pBytesWritten,NULL)) printf(" DeviceIoControl returned an error = %d\n",nResult = GetLastError()); else printf(" CreateFile returned an error = % d\n",nResult = GetLastError()); if (bCreatedDevice) if (!DefineDosDevice(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION |DDD_EXACT_MATCH_ON_REMOVE,lpAdapterName,LinkName)) { ErrorNumber = GetLastError(); printf("DefineDosDevice returned an error creating the device = %d\n", ErrorNumber); return( ErrorNumber ); } return( nResult ); } Tag: Shared Memory between User app and Driver Tag: 27692
  - 25
    - PCMCIA card client driver samples? I am starting write a 16 bit PC Card(Data Acquisition card) driver for Windows 2000/XP and wondering if there is any code example. Can anyone here point it out? Thanks Tag: Shared Memory between User app and Driver Tag: 27686
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  - 1
    - ScatterGatherList Fails Hi, I am using GetScatterGatherList for doing Bus Master DMA. It fails with status = "STATUS_BUFFER_TOO_SMALL". I have called it 9 times, but only two times it passes. What is the reason for this status code ? Which buffer is too small ? Number of MapRegisters allocated is 8. The buffer size to be transferred is 5120, it spans to a maximum of 3 pages. The following is the function call Status = DeviceExtension->AdapterObject->DmaOperations->GetScatterGatherList( DeviceExtension->AdapterObject, DeviceObject, mdl, // IRP->MdlAddress DeviceExtension->CurrentVaddr, // MmGetMdlVirtualAddress(mdl) transferSize, // 8192 or 12298 (2 * PAGE_SIZE or 3 *PAGE_SIZE) (PDRIVER_LIST_CONTROL) AdapterListControl, DeviceExtension, bOperationType); // bOperation = TRUE for a write, FALSE for a read. Thanks Kumar Tag: Shared Memory between User app and Driver Tag: 27685
  - 2
    - Sample code for NDIS 802.11 driver? Hi, Is there any sample code for NDIS 802.11 driver? I installed windows server 2003 DDK. There is no 802.11 driver sample. Thanks for your input. Lin Tag: Shared Memory between User app and Driver Tag: 27677
  - 3
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  - 4
    - [Q] USB Mass Storage Device IOCTL failure I'm developing a USB mass storage device with an additional functionality. There is no problem in locating the device's symbolic link, using SetupDiXXX functions. But if I try to DeviceIoControl() IOCTL_STORAGE_GET_DEVICE_NUMBER, IOCTL_SCSI_GET_INQUIRY_DATA, and other disk and storage control codes as well, after opening the device through CreateFile() with the following symbolic link name, it fails with the error code 50, which means ERROR_NOT_SUPPORTED. \??\USB#Vid_0c76&Pid_0005#0304281630200#{a5dcbf10-6530-11d2-901f-00c04fb951ed} To be more precise, my USB storage device supports Bulk-Only Transport protocol and announces itself as a SCSI transparent subclass device. If there is anybody who had ever stuck in this type of problem, please give me some clues for solving it. **** I have one more question. I'm in the position to develop hardware and software. So for now, I'm trying to compose a small program controlling a mass storage device of another manufacturer. If I'm to develop the firmware without relying on the USB controller customized to the specific application, do I have to write a firmware parsing all the SCSI command set? Or is there any documentation that specifies which part of the standard SCSI command set USB mass storage device spec supports? I'm afraid if I have to deal with a whole bunch of SCSI command set. Need some advice. Thanks Tag: Shared Memory between User app and Driver Tag: 27664
  - 5
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  - 6
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  - 7
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  - 8
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  - 9
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  - 12
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Hi

I want to create a shared memory interface between a user
application and a NDIS miniport driver. The purpose of
this interface is that the driver continuosly writes some
information to the shared memory which accesses this
information periodically.

Could you please suggest the best way of doing this ?

Thanks in advance
Ankush

Top

Re: Shared Memory between User app and Driver by Marc

Marc
Wed Jul 02 13:10:54 CDT 2003

Use NdisMRegisterDevice() to create a separate device object for your
miniport. Then use normal methods for sharing memory between User Mode and
Kernel Mode.

Marc Reinig
System Solutions

"Ankush" <ankushv@hotmail.com> wrote in message
news:022d01c340ba$9c9040a0$a101280a@phx.gbl...
> I want to create a shared memory interface between a user
> application and a NDIS miniport driver. The purpose of
> this interface is that the driver continuosly writes some
> information to the shared memory which accesses this
> information periodically.
>
> Could you please suggest the best way of doing this ?

Top

Re: Shared Memory between User app and Driver by Ankush

Ankush
Wed Jul 02 13:29:46 CDT 2003

Would file mapping - using CreateFile and
CreateFileMapping - work?

Or do I have to do something else?

Thanks in advance
Ankush
>-----Original Message-----
>Use NdisMRegisterDevice() to create a separate device
object for your
>miniport. Then use normal methods for sharing memory
between User Mode and
>Kernel Mode.
>
>Marc Reinig
>System Solutions
>
>"Ankush" <ankushv@hotmail.com> wrote in message
>news:022d01c340ba$9c9040a0$a101280a@phx.gbl...
>> I want to create a shared memory interface between a
user
>> application and a NDIS miniport driver. The purpose of
>> this interface is that the driver continuosly writes
some
>> information to the shared memory which accesses this
>> information periodically.
>>
>> Could you please suggest the best way of doing this ?
>
>
>.
>

Top