On Gwe, 2005-07-08 at 09:18, Thomas Hellström wrote:
Is this because they are not physically contigous or because they may not
be accessible to the PCI device? I was thinking of using vmalloced memory
instead of kmalloced for the device sg-list, and since it is a linked list
it should be able
Hi!
3.) Is memory allocated with vmalloc always locked into physical memory
until freed?
Yes but it may not be DMAable.
Thanks.
Is this because they are not physically contigous or because they may not
be accessible to the PCI device? I was thinking of using vmalloced memory
instead of
Hi!
I'm trying to incorporate a patch I got for DMA bitblt into the via drm.
Probably useful for a lot of things including Xv image transfer, Texture
downloads and Exa acceleration.
Got it working, but to really know what I'm doing, being a kernel
programming novice, could I have some help
http://lwn.net/Kernel/LDD3/
Chapter 15 explains how DMA works under Linux.
--
Jon Smirl
[EMAIL PROTECTED]
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Jon Smirl wrote:
http://lwn.net/Kernel/LDD3/
Chapter 15 explains how DMA works under Linux.
Thanks!
/Thomas
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On Iau, 2005-07-07 at 23:50, Thomas Hellström wrote:
1.) get_user_pages() should presumably lock a page into physical memory.
Will this always cause a segfault for an invalid address?
You'll get an error for invalid space. You may also get null entries in
the array for locking the paged if
