IB/hfi1: Optimize packet type comparison using 9B and bypass code paths
The packet type comparison used to find out if a packet is a bypass
packet in the hot path is an expensive operation as seen in a profile.
Determine packet's pkey and migration bit through the bypass and 9B
code paths instead.
Reviewed-by: Don Hiatt <don.hiatt@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
diff --git a/drivers/infiniband/hw/hfi1/ruc.c b/drivers/infiniband/hw/hfi1/ruc.c
index 0cced9a..6434207 100644
--- a/drivers/infiniband/hw/hfi1/ruc.c
+++ b/drivers/infiniband/hw/hfi1/ruc.c
@@ -225,19 +225,8 @@ int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet)
u32 dlid = packet->dlid;
u32 slid = packet->slid;
u32 sl = packet->sl;
- int migrated;
- u32 bth0, bth1;
- u16 pkey;
-
- bth0 = be32_to_cpu(packet->ohdr->bth[0]);
- bth1 = be32_to_cpu(packet->ohdr->bth[1]);
- if (packet->etype == RHF_RCV_TYPE_BYPASS) {
- pkey = hfi1_16B_get_pkey(packet->hdr);
- migrated = bth1 & OPA_BTH_MIG_REQ;
- } else {
- pkey = ib_bth_get_pkey(packet->ohdr);
- migrated = bth0 & IB_BTH_MIG_REQ;
- }
+ bool migrated = packet->migrated;
+ u16 pkey = packet->pkey;
if (qp->s_mig_state == IB_MIG_ARMED && migrated) {
if (!packet->grh) {