diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2020-08-28 15:12:10 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-09-03 12:40:12 +0530 |
| commit | d7aad5550eca50370e3a1471b46281d03af0699e (patch) | |
| tree | 86f2cefe46536f65d9adf8035b11a02f4c8ad3ec /drivers/dma/idxd/device.c | |
| parent | b0ef489e2a9cfcb64e4a20f308023afaea9db8d3 (diff) | |
| download | linux-d7aad5550eca50370e3a1471b46281d03af0699e.tar.bz2 | |
dmaengine: idxd: add support for configurable max wq xfer size
Add sysfs attribute max_xfer_size to wq in order to allow the max xfer
size configured on a per wq basis. Add support code to configure
the valid user input on wq enable. This is a performance tuning
parameter.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/159865265404.29141.3049399618578194052.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/device.c')
| -rw-r--r-- | drivers/dma/idxd/device.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index 14b45853aa5f..b8dbb7001933 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -529,7 +529,7 @@ static int idxd_wq_config_write(struct idxd_wq *wq) wq->wqcfg.priority = wq->priority; /* bytes 12-15 */ - wq->wqcfg.max_xfer_shift = idxd->hw.gen_cap.max_xfer_shift; + wq->wqcfg.max_xfer_shift = ilog2(wq->max_xfer_bytes); wq->wqcfg.max_batch_shift = idxd->hw.gen_cap.max_batch_shift; dev_dbg(dev, "WQ %d CFGs\n", wq->id); |