[EMAIL PROTECTED] said:
> The problem I have is: Is there an efficient way to lock the pages
> which are accessed by the DMA?
map_user_kiobuf, lock it, DMA into it, unlock it and unmap it again?
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dwmw2
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Jeff Garzik wrote:
>
> On Tue, 20 Feb 2001, Norbert Roos wrote:
>
> > Jeff Garzik wrote:
> >
> > > > But the buffers are usually allocated with malloc() by any application
> > > > which wants to use my driver.. otherwise my driver would have to offer a
>
> fd = open(...);
> buf = mmap(fd, ...)
On Tue, 20 Feb 2001, Norbert Roos wrote:
> Jeff Garzik wrote:
>
> > > But the buffers are usually allocated with malloc() by any application
> > > which wants to use my driver.. otherwise my driver would have to offer a
> > > malloc-like function, but I can hardly force the application to use my
Jeff Garzik wrote:
> > But the buffers are usually allocated with malloc() by any application
> > which wants to use my driver.. otherwise my driver would have to offer a
> > malloc-like function, but I can hardly force the application to use my
> > own malloc function.
>
> If you are writing th
On Tue, 20 Feb 2001, Norbert Roos wrote:
> > Allocate the buffers in the kernel and mmap() them into user space
>
> But the buffers are usually allocated with malloc() by any application
> which wants to use my driver.. otherwise my driver would have to offer a
> malloc-like function, but I can h
> Allocate the buffers in the kernel and mmap() them into user space
But the buffers are usually allocated with malloc() by any application
which wants to use my driver.. otherwise my driver would have to offer a
malloc-like function, but I can hardly force the application to use my
own malloc f
> I'm currently writing a driver which wants to transfer data between main
> memory and a PCI device. The data buffers are allocated by the program
> which uses the driver and therefore lie in the user space. Pointers to
Allocate the buffers in the kernel and mmap() them into user space
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Hello!
I think the following is general problem, but i haven't found any
information about that yet..
I'm currently writing a driver which wants to transfer data between main
memory and a PCI device. The data buffers are allocated by the program
which uses the driver and therefore lie in the us
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