From: Rao Shoaib <rao.shoaib@oracle.com>
Date: Mon, 13 Jan 2020 16:41:19 -0800
Subject: Introduce maximum WQE size to check limits
Patch-mainline: v5.6-rc1
Git-commit: 4e8d683f11767dc6cd8eaac6b599928f343b4cdb
References: jsc#SLE-8449

Introduce maximum WQE size to impose limits on max SGE's and inline data

Link: https://lore.kernel.org/r/1578962480-17814-2-git-send-email-rao.shoaib@oracle.com
Signed-off-by: Rao Shoaib <rao.shoaib@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/sw/rxe/rxe_param.h |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/sw/rxe/rxe_param.h
+++ b/drivers/infiniband/sw/rxe/rxe_param.h
@@ -34,6 +34,8 @@
 #ifndef RXE_PARAM_H
 #define RXE_PARAM_H
 
+#include <uapi/rdma/rdma_user_rxe.h>
+
 static inline enum ib_mtu rxe_mtu_int_to_enum(int mtu)
 {
 	if (mtu < 256)
@@ -64,7 +66,6 @@ enum rxe_device_param {
 	RXE_PAGE_SIZE_CAP		= 0xfffff000,
 	RXE_MAX_QP			= 0x10000,
 	RXE_MAX_QP_WR			= 0x4000,
-	RXE_MAX_INLINE_DATA		= 400,
 	RXE_DEVICE_CAP_FLAGS		= IB_DEVICE_BAD_PKEY_CNTR
 					| IB_DEVICE_BAD_QKEY_CNTR
 					| IB_DEVICE_AUTO_PATH_MIG
@@ -77,6 +78,10 @@ enum rxe_device_param {
 					| IB_DEVICE_MEM_MGT_EXTENSIONS
 					| IB_DEVICE_ALLOW_USER_UNREG,
 	RXE_MAX_SGE			= 32,
+	RXE_MAX_WQE_SIZE		= sizeof(struct rxe_send_wqe) +
+					  sizeof(struct ib_sge) * RXE_MAX_SGE,
+	RXE_MAX_INLINE_DATA		= RXE_MAX_WQE_SIZE -
+					  sizeof(struct rxe_send_wqe),
 	RXE_MAX_SGE_RD			= 32,
 	RXE_MAX_CQ			= 16384,
 	RXE_MAX_LOG_CQE			= 15,