From: Christoph Hellwig <hch@lst.de>
Date: Tue, 3 May 2016 16:01:05 +0000 (+0200)
Subject: IB/core: add a helper to check for READ WITH INVALIDATE support
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=002516edf5176dde2bee54addb7e6e8129a9532b;p=linux-beck.git

IB/core: add a helper to check for READ WITH INVALIDATE support

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
---

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 24d0d82a07b4..9e8616af6899 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2318,6 +2318,18 @@ static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
 		device->add_gid && device->del_gid;
 }
 
+/*
+ * Check if the device supports READ W/ INVALIDATE.
+ */
+static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num)
+{
+	/*
+	 * iWarp drivers must support READ W/ INVALIDATE.  No other protocol
+	 * has support for it yet.
+	 */
+	return rdma_protocol_iwarp(dev, port_num);
+}
+
 int ib_query_gid(struct ib_device *device,
 		 u8 port_num, int index, union ib_gid *gid,
 		 struct ib_gid_attr *attr);