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/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h
index c2aeb32..ffc933e 100644
--- a/drivers/infiniband/hw/hfi1/verbs.h
+++ b/drivers/infiniband/hw/hfi1/verbs.h
@@ -405,6 +405,11 @@ static inline void cacheless_memcpy(void *dst, void *src, size_t n)
__copy_user_nocache(dst, (void __user *)src, n, 0);
}
+static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
+{
+ return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
+}
+
extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
extern const u8 hdr_len_by_opcode[];