From: Don Hiatt <don.hiatt@intel.com>
Date: Tue, 15 May 2018 18:28:07 -0700
Subject: IB/hfi1: Define 16B Management Packets
Patch-mainline: v4.18-rc1
Git-commit: 4171a693a5159e47f72eea3331bebf538dea9b83
References: bsc#1114685 FATE#325854

Add 16B Management Packet definition. This optimized packet
format replaces the ib_other_headers and BTH with a source
and destination QP number.

To support these packets we introduce struct opa_16b_mgmt
into the struct hfi1_16b_header.

This packet format is only used for MAD packets using the
IB_OPCODE_UD_SEND_ONLY opcode on QP0/1.

The original 16B implementation failed to use 16B management
packets so now we add their definition.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hfi1/hfi.h   |    1 +
 drivers/infiniband/hw/hfi1/verbs.h |    7 +++++++
 2 files changed, 8 insertions(+)

--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -392,6 +392,7 @@ struct hfi1_packet {
  */
 #define OPA_16B_L4_9B		0x00
 #define OPA_16B_L2_TYPE		0x02
+#define OPA_16B_L4_FM		0x08
 #define OPA_16B_L4_IB_LOCAL	0x09
 #define OPA_16B_L4_IB_GLOBAL	0x0A
 #define OPA_16B_L4_ETHR		OPA_VNIC_L4_ETHR
--- a/drivers/infiniband/hw/hfi1/verbs.h
+++ b/drivers/infiniband/hw/hfi1/verbs.h
@@ -110,6 +110,12 @@ enum {
 #define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
 
+/* 24Bits for qpn, upper 8Bits reserved */
+struct opa_16b_mgmt {
+	__be32 dest_qpn;
+	__be32 src_qpn;
+};
+
 struct hfi1_16b_header {
 	u32 lrh[4];
 	union {
@@ -118,6 +124,7 @@ struct hfi1_16b_header {
 			struct ib_other_headers oth;
 		} l;
 		struct ib_other_headers oth;
+		struct opa_16b_mgmt mgmt;
 	} u;
 } __packed;