lkml.org 
[lkml]   [2000]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
Subjectkmap for dma buffer
hi all,
For dma transfers to/from user space buffer, one need to lock that user
space buffer so that it won't be swaped out. and also
its bus address is obtained by call virt_to_bus and then this bus address
is written to dma controller.
but do we explicitly need to map that user buffer into kernel space by
calling kmap after obtaining the user buffer's page struct??

thanks.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:41    [W:0.022 / U:5.332 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site