From: Fenghua Yu fenghua.yu@intel.com
[ Upstream commit 9735bde36487da43d3c3fc910df49639f72decbf ]
On DSA/IAX 1.0, TC-A and TC-B in GRPCFG are set as 1 to have best performance and cannot be changed through sysfs knobs unless override option is given.
The same values should be set on DSA 2.0 as well.
Fixes: ea7c8f598c32 ("dmaengine: idxd: restore traffic class defaults after wq reset") Fixes: ade8a86b512c ("dmaengine: idxd: Set defaults for GRPCFG traffic class") Signed-off-by: Fenghua Yu fenghua.yu@intel.com Reviewed-by: Dave Jiang dave.jiang@intel.com Link: https://lore.kernel.org/r/20221209172141.562648-1-fenghua.yu@intel.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/idxd/device.c | 2 +- drivers/dma/idxd/init.c | 2 +- drivers/dma/idxd/sysfs.c | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index 37b07c679c0ee..535f021911c55 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -702,7 +702,7 @@ static void idxd_groups_clear_state(struct idxd_device *idxd) group->use_rdbuf_limit = false; group->rdbufs_allowed = 0; group->rdbufs_reserved = 0; - if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) { + if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override) { group->tc_a = 1; group->tc_b = 1; } else { diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 6263d9825250b..e0e0c7f286b67 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -340,7 +340,7 @@ static int idxd_setup_groups(struct idxd_device *idxd) }
idxd->groups[i] = group; - if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) { + if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override) { group->tc_a = 1; group->tc_b = 1; } else { diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 33d94c67fedb9..489a9d8850764 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -327,7 +327,7 @@ 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) + if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override) return -EPERM;
if (val < 0 || val > 7) @@ -369,7 +369,7 @@ 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) + if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override) return -EPERM;
if (val < 0 || val > 7)