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authorDan Williams <dan.j.williams@intel.com>2009-09-08 17:42:57 -0700
committerDan Williams <dan.j.williams@intel.com>2009-09-08 17:42:57 -0700
commite61dacaeb3918cd00cd642e8fb0828324ac59819 (patch)
tree70c4acf1cf33502bdca8da16bd88c0daab2bbc29 /drivers/dma/ioat/dma_v3.c
parent5669e31c5a4874f1634bc0ffba268a6e2fa0cdd2 (diff)
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ioat3: enable dca for completion writes
Tag completion writes for direct cache access to reduce the latency of checking for descriptor completions. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/ioat/dma_v3.c')
-rw-r--r--drivers/dma/ioat/dma_v3.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 22af78ec257..0913d11e09e 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -167,7 +167,8 @@ static void ioat3_cleanup_tasklet(unsigned long data)
struct ioat2_dma_chan *ioat = (void *) data;
ioat3_cleanup(ioat);
- writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
+ writew(IOAT_CHANCTRL_RUN | IOAT3_CHANCTRL_COMPL_DCA_EN,
+ ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
}
static void ioat3_restart_channel(struct ioat2_dma_chan *ioat)