diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:42:57 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:42:57 -0700 |
| commit | e61dacaeb3918cd00cd642e8fb0828324ac59819 (patch) | |
| tree | 70c4acf1cf33502bdca8da16bd88c0daab2bbc29 /drivers/dma/ioat/dma_v3.c | |
| parent | 5669e31c5a4874f1634bc0ffba268a6e2fa0cdd2 (diff) | |
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.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index 22af78ec2573..0913d11e09ee 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) |