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From: rao Shoaib <rao.shoaib@oracle.com>
To: linux-rdma@vger.kernel.org
Cc: jgg@ziepe.ca, monis@mellanox.com, dledford@redhat.com,
	sean.hefty@intel.com, hal.rosenstock@gmail.com,
	linux-kernel@vger.kernel.org, Rao Shoaib <rao.shoaib@oracle.com>
Subject: [PATCH v3 1/2] Introduce maximum WQE size to check limits
Date: Mon, 13 Jan 2020 16:41:19 -0800
Message-ID: <1578962480-17814-2-git-send-email-rao.shoaib@oracle.com> (raw)
In-Reply-To: <1578962480-17814-1-git-send-email-rao.shoaib@oracle.com>

From: Rao Shoaib <rao.shoaib@oracle.com>

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

Signed-off-by: Rao Shoaib <rao.shoaib@oracle.com>
---
 drivers/infiniband/sw/rxe/rxe_param.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_param.h b/drivers/infiniband/sw/rxe/rxe_param.h
index 1b596fb..a0e4075 100644
--- 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)
@@ -68,7 +70,6 @@ enum rxe_device_param {
 	RXE_HW_VER			= 0,
 	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
@@ -80,6 +81,10 @@ enum rxe_device_param {
 					| IB_DEVICE_SRQ_RESIZE
 					| IB_DEVICE_MEM_MGT_EXTENSIONS,
 	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,
-- 
1.8.3.1


  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14  0:41 [PATCH v3 0/2] rxe should use same buffer size for SGE's and inline data rao Shoaib
2020-01-14  0:41 ` rao Shoaib [this message]
2020-01-14  0:41 ` [PATCH v3 2/2] SGE buffer and max_inline data must have same size rao Shoaib
2020-01-15 18:27   ` Jason Gunthorpe
2020-01-15 19:57     ` Rao Shoaib
2020-01-15 20:05       ` Rao Shoaib
2020-01-15 20:36       ` Jason Gunthorpe

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