Re: Device Driver loading error on 2nd PCI card, WinXP SP1
From: Alexander Grigoriev (alegr_at_earthlink.net)
Date: 05/12/04
- Next message: Shalini: "Re: PAGE_FAULT_IN_NONPAGED_AREA"
- Previous message: G?ran Davidsson: "Resource conflict"
- In reply to: Curtis Rubel: "Device Driver loading error on 2nd PCI card, WinXP SP1"
- Next in thread: Curtis Rubel: "Re: Device Driver loading error on 2nd PCI card, WinXP SP1"
- Reply: Curtis Rubel: "Re: Device Driver loading error on 2nd PCI card, WinXP SP1"
- Messages sorted by: [ date ] [ thread ]
Date: Wed, 12 May 2004 07:17:16 -0700
Are you sure your pPartialDescriptorTranslated is valid?
"Curtis Rubel" <crubel@compro.net> wrote in message
news:a90c8db8.0405111152.51f5e3a0@posting.google.com...
> Hello,
>
> We have a PCI memory card that is requesting 64MB of Memory Resource
> space, along with a small amount, 256K of register access memory
resources,
> and a PCI interrupt resource. There is also a 1MB DMA CommonBuffer setup
> for this device to use.
>
> I am mapping the 64MB region into my driver space via the call:
>
> pDevExt->local_sram_ptr =
> MmMapIoSpace
(pPartialDescriptorTranslated->u.Memory.Start,
>
pPartialDescriptorTranslated->u.Memory.Length,
> MmNonCached);
>
> Everything works fine if only one such card is installed into
> the system. Driver verifier shows no abnormalities with the driver
running,
> all IOCTL calls tested, DMA testing passes ok as well. Even ran the
driver
> with /PAE enabled just to make sure the driver was PAE correctly aware.
>
> When a 2nd card is installed the Add_Device routine runs successfully
> and exits, however when the Start_Device routine is called the system
> fails with a Bug(0x7E) error and never actually makes it into my
> Start_Device handler. If I remove the MmMapIoSpace call for
> the 64MB area the driver loads successfully on both cards. Obviously
> the memory on the card is then not accessable.
>
> I am suspecting that there is a memory resource problem causing this
> issue, however I would not expect the system to crash. I would expect the
> MmMapIoSpace call to return insufficient resources if there was a resource
> problem as its supposed to do. But it never actually makes it into the
> Start_Device routine to give me that error.
>
> The WinNt4 version of our driver does not load successfully on
> the 2nd PCI card either, but it does at least return an error and
> does not crash the system.
>
> Why can I not MmMap the 64MB of PCI address space into
> my driver twice? I have set the SystemPages entry in the registry
> to 0xffffffff as some posts suggest and it has no affect on the error.
>
> Thank you,
>
> Curtis Rubel
- Next message: Shalini: "Re: PAGE_FAULT_IN_NONPAGED_AREA"
- Previous message: G?ran Davidsson: "Resource conflict"
- In reply to: Curtis Rubel: "Device Driver loading error on 2nd PCI card, WinXP SP1"
- Next in thread: Curtis Rubel: "Re: Device Driver loading error on 2nd PCI card, WinXP SP1"
- Reply: Curtis Rubel: "Re: Device Driver loading error on 2nd PCI card, WinXP SP1"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
