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| author | Dave Jiang <dave.jiang@intel.com> | 2021-07-20 23:42:10 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-07-28 15:25:40 +0300 |
| commit | ade8a86b512cf8db0d0e975a971ce356953cfcb3 (patch) | |
| tree | fa325515ae8b19e7fc7245ce7e23d40f88bc81ca /drivers/dma/idxd/sysfs.c | |
| parent | 258cb692b82025d0e6e1cccb72baa60ff78d0ce8 (diff) | |
| download | linux-ade8a86b512cf8db0d0e975a971ce356953cfcb3.tar.xz | |
dmaengine: idxd: Set defaults for GRPCFG traffic class
Set GRPCFG traffic class to value of 1 for best performance on current
generation of accelerators. Also add override option to allow experimentation.
Sysfs knobs are disabled for DSA/IAX gen1 devices.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162681373005.1968485.3761065664382799202.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index b883e9f16e7f..881a12596d4b 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -327,6 +327,9 @@ static ssize_t group_traffic_class_a_store(struct device *dev, if (idxd->state == IDXD_DEV_ENABLED) return -EPERM; + if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) + return -EPERM; + if (val < 0 || val > 7) return -EINVAL; @@ -366,6 +369,9 @@ static ssize_t group_traffic_class_b_store(struct device *dev, if (idxd->state == IDXD_DEV_ENABLED) return -EPERM; + if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) + return -EPERM; + if (val < 0 || val > 7) return -EINVAL; |