This is a note to let you know that I've just added the patch titled dmaengine: idxd: Set traffic class values in GRPCFG on DSA 2.0 to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dmaengine-idxd-set-traffic-class-values-in-grpcfg-on.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 39e34881f3778f7102f7b60064423068736c2bbb Author: Fenghua Yu <fenghua.yu@xxxxxxxxx> Date: Fri Dec 9 09:21:41 2022 -0800 dmaengine: idxd: Set traffic class values in GRPCFG on DSA 2.0 [ 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@xxxxxxxxx> Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx> Link: https://lore.kernel.org/r/20221209172141.562648-1-fenghua.yu@xxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index 6d8ff664fdfb2..3b4ad7739f9ee 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 09cbf0c179ba9..e0f49545d89ff 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -296,7 +296,7 @@ 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 3229dfc786507..18cd8151dee02 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -387,7 +387,7 @@ 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) @@ -429,7 +429,7 @@ 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)