diff options
| 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/init.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/init.c')
| -rw-r--r-- | drivers/dma/idxd/init.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 8db56f98059f..eb09bc591c31 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -32,6 +32,10 @@ static bool sva = true; module_param(sva, bool, 0644); MODULE_PARM_DESC(sva, "Toggle SVA support on/off"); +bool tc_override; +module_param(tc_override, bool, 0644); +MODULE_PARM_DESC(tc_override, "Override traffic class defaults"); + #define DRV_NAME "idxd" bool support_enqcmd; @@ -336,8 +340,13 @@ static int idxd_setup_groups(struct idxd_device *idxd) } idxd->groups[i] = group; - group->tc_a = -1; - group->tc_b = -1; + if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) { + group->tc_a = 1; + group->tc_b = 1; + } else { + group->tc_a = -1; + group->tc_b = -1; + } } return 0; |