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authorChristoph Hellwig <hch@lst.de>2016-05-03 19:01:07 +0300
committerDoug Ledford <dledford@redhat.com>2016-05-13 20:37:18 +0300
commitfffb0383cf0b433ad029d19e6e9d6f1f46523ace (patch)
treebbef7530c7911f2df6a02d19547ee81a1ca341d3 /include/rdma
parent04c41bf39f5b2de72bda04cf10bb95ea1870a94f (diff)
downloadlinux-fffb0383cf0b433ad029d19e6e9d6f1f46523ace.tar.xz
IB/core: add a simple MR pool
Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Steve Wise <swise@opengridcomputing.com> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h8
-rw-r--r--include/rdma/mr_pool.h25
2 files changed, 32 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 9e8616af6899..400a8a0422a4 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1421,9 +1421,12 @@ struct ib_qp {
struct ib_pd *pd;
struct ib_cq *send_cq;
struct ib_cq *recv_cq;
+ spinlock_t mr_lock;
+ int mrs_used;
struct ib_srq *srq;
struct ib_xrcd *xrcd; /* XRC TGT QPs only */
struct list_head xrcd_list;
+
/* count times opened, mcast attaches, flow attaches */
atomic_t usecnt;
struct list_head open_list;
@@ -1438,12 +1441,15 @@ struct ib_qp {
struct ib_mr {
struct ib_device *device;
struct ib_pd *pd;
- struct ib_uobject *uobject;
u32 lkey;
u32 rkey;
u64 iova;
u32 length;
unsigned int page_size;
+ union {
+ struct ib_uobject *uobject; /* user */
+ struct list_head qp_entry; /* FR */
+ };
};
struct ib_mw {
diff --git a/include/rdma/mr_pool.h b/include/rdma/mr_pool.h
new file mode 100644
index 000000000000..986010b812eb
--- /dev/null
+++ b/include/rdma/mr_pool.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2016 HGST, a Western Digital Company.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+#ifndef _RDMA_MR_POOL_H
+#define _RDMA_MR_POOL_H 1
+
+#include <rdma/ib_verbs.h>
+
+struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list);
+void ib_mr_pool_put(struct ib_qp *qp, struct list_head *list, struct ib_mr *mr);
+
+int ib_mr_pool_init(struct ib_qp *qp, struct list_head *list, int nr,
+ enum ib_mr_type type, u32 max_num_sg);
+void ib_mr_pool_destroy(struct ib_qp *qp, struct list_head *list);
+
+#endif /* _RDMA_MR_POOL_H */