Messages in this thread |  | | | From | (Alan Cox) | | Subject | Re: Address spaces on a i386 - Getting Confused | | Date | Tue, 30 Mar 1999 15:25:02 +0100 (BST) |
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> I think unless you are willing to go into the hair the bttv driver > does, you're going to need to have the device put it into a kernel > buffer and then copy it into user space.
The bttv is hairy because it maps a lot of vmalloc space using scatter gather DMA. If you need 32K for a 3D acceleration buffer then you can handle it much more cleanly than the bttv driver. Take a look at the sound drivers. They kmalloc a block of memory and mmap it into the user space. Thats pretty clean
Alan
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