IB/core: Add XRQ capabilities

This patch adds following TM XRQ capabilities:

* max_rndv_hdr_size - Max size of rendezvous request message
* max_num_tags - Max number of entries in tag matching list
* max_ops - Max number of outstanding list operations
* max_sge - Max number of SGE in tag matching entry
* flags - the following flags are currently defined:
    - IB_TM_CAP_RC - Support tag matching on RC transport

Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Reviewed-by: Yossi Itigin <yosefe@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

include/rdma/ib_verbs.h

@@ -280,6 +280,24 @@ struct ib_rss_caps {
 	u32 max_rwq_indirection_table_size;
 };
 
+enum ib_tm_cap_flags {
+	/*  Support tag matching on RC transport */
+	IB_TM_CAP_RC		    = 1 << 0,
+};
+
+struct ib_xrq_caps {
+	/* Max size of RNDV header */
+	u32 max_rndv_hdr_size;
+	/* Max number of entries in tag matching list */
+	u32 max_num_tags;
+	/* From enum ib_tm_cap_flags */
+	u32 flags;
+	/* Max number of outstanding list operations */
+	u32 max_ops;
+	/* Max number of SGE in tag matching entry */
+	u32 max_sge;
+};
+
 enum ib_cq_creation_flags {
 	IB_CQ_FLAGS_TIMESTAMP_COMPLETION   = 1 << 0,
 	IB_CQ_FLAGS_IGNORE_OVERRUN	   = 1 << 1,
@@ -340,6 +358,7 @@ struct ib_device_attr {
 	struct ib_rss_caps	rss_caps;
 	u32			max_wq_type_rq;
 	u32			raw_packet_caps; /* Use ib_raw_packet_caps enum */
+	struct ib_xrq_caps	xrq_caps;
 };
 
 enum ib_mtu {