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authorDan Williams <dan.j.williams@intel.com>2009-08-26 22:01:44 +0200
committerDan Williams <dan.j.williams@intel.com>2009-09-09 02:29:55 +0200
commit5cbafa65b92ee4f5b8ba915cddf94b91f186b989 (patch)
treef074c9dbcdedf05c5567a4e456a15120895363a6 /drivers/dma/ioat/pci.c
parentioat: prepare the code for ioat[12]_dma_chan split (diff)
downloadlinux-5cbafa65b92ee4f5b8ba915cddf94b91f186b989.tar.xz
linux-5cbafa65b92ee4f5b8ba915cddf94b91f186b989.zip
ioat2,3: convert to a true ring buffer
Replace the current linked list munged into a ring with a native ring buffer implementation. The benefit of this approach is reduced overhead as many parameters can be derived from ring position with simple pointer comparisons and descriptor allocation/freeing becomes just a manipulation of head/tail pointers. It requires a contiguous allocation for the software descriptor information. Since this arrangement is significantly different from the ioat1 chain, move ioat2,3 support into its own file and header. Common routines are exported from driver/dma/ioat/dma.[ch]. Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to '')
-rw-r--r--drivers/dma/ioat/pci.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/ioat/pci.c b/drivers/dma/ioat/pci.c
index 55414d88ac1b..c4e432269252 100644
--- a/drivers/dma/ioat/pci.c
+++ b/drivers/dma/ioat/pci.c
@@ -31,6 +31,7 @@
#include <linux/interrupt.h>
#include <linux/dca.h>
#include "dma.h"
+#include "dma_v2.h"
#include "registers.h"
#include "hw.h"