From: Intiyaz Basha Date: Wed, 28 Mar 2018 02:25:18 +0000 (-0700) Subject: liquidio: Prioritize control messages X-Git-Tag: v5.15~9146^2~63 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=697fefc7c1531f75ecd9623a4a4cbd47fab32ca8;p=platform%2Fkernel%2Flinux-starfive.git liquidio: Prioritize control messages During heavy tx traffic, control messages (sent by liquidio driver to NIC firmware) sometimes do not get processed in a timely manner. Reason is: the low-level metadata of control messages and that of egress network packets indicate that they have the same priority. Fix it by setting a higher priority for control messages through the new ctrl_qpg field in the oct_txpciq struct. It is the NIC firmware that does the actual setting of priority by writing to the new ctrl_qpg field; the host driver treats that value as opaque and just assigns it to pki_ih3->qpg Signed-off-by: Intiyaz Basha Signed-off-by: Felix Manlunas Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h index 82a783d..75eea83 100644 --- a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h +++ b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h @@ -712,9 +712,13 @@ union oct_txpciq { u64 pkind:6; u64 use_qpg:1; u64 qpg:11; - u64 reserved:30; + u64 reserved0:10; + u64 ctrl_qpg:11; + u64 reserved:9; #else - u64 reserved:30; + u64 reserved:9; + u64 ctrl_qpg:11; + u64 reserved0:10; u64 qpg:11; u64 use_qpg:1; u64 pkind:6; diff --git a/drivers/net/ethernet/cavium/liquidio/request_manager.c b/drivers/net/ethernet/cavium/liquidio/request_manager.c index 2766af0..b127035 100644 --- a/drivers/net/ethernet/cavium/liquidio/request_manager.c +++ b/drivers/net/ethernet/cavium/liquidio/request_manager.c @@ -628,7 +628,8 @@ octeon_prepare_soft_command(struct octeon_device *oct, pki_ih3->tag = LIO_CONTROL; pki_ih3->tagtype = ATOMIC_TAG; pki_ih3->qpg = - oct->instr_queue[sc->iq_no]->txpciq.s.qpg; + oct->instr_queue[sc->iq_no]->txpciq.s.ctrl_qpg; + pki_ih3->pm = 0x7; pki_ih3->sl = 8;