[PATCH 3/5] nvme-rdma.h: Add includes for nvme rdma_cm negotiation

Christoph Hellwig
2016-06-06T21:23:56Z

From: Sagi Grimberg <sagi@grimberg.me>

NVMe over Fabrics RDMA transport defines a connection establishment
protocol over the RDMA connection manager. This header will be used by
both the host and target drivers to negotiate the connection
establishment parameters.

Signed-off-by: Jay Freyensee <james.p.freyensee@intel.com>
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/nvme-rdma.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
create mode 100644 include/linux/nvme-rdma.h

diff --git a/include/linux/nvme-rdma.h b/include/linux/nvme-rdma.h
new file mode 100644
index 0000000..bf240a3
--- /dev/null
+++ b/include/linux/nvme-rdma.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
+ *
+ * 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 _LINUX_NVME_RDMA_H
+#define _LINUX_NVME_RDMA_H
+
+enum nvme_rdma_cm_fmt {
+ NVME_RDMA_CM_FMT_1_0 = 0x0,
+};
+
+enum nvme_rdma_cm_status {
+ NVME_RDMA_CM_INVALID_LEN = 0x01,
+ NVME_RDMA_CM_INVALID_RECFMT = 0x02,
+ NVME_RDMA_CM_INVALID_QID = 0x03,
+ NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
+ NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
+ NVME_RDMA_CM_NO_RSC = 0x06,
+ NVME_RDMA_CM_INVALID_IRD = 0x07,
+ NVME_RDMA_CM_INVALID_ORD = 0x08,
+};
+
+/**
+ * struct nvme_rdma_cm_req - rdma connect request
+ *
+ * @recfmt: format of the RDMA Private Data
+ * @qid: queue Identifier for the Admin or I/O Queue
+ * @hrqsize: host receive queue size to be created
+ * @hsqsize: host send queue size to be created
+ */
+struct nvme_rdma_cm_req {
+ __le16 recfmt;
+ __le16 qid;
+ __le16 hrqsize;
+ __le16 hsqsize;
+ u8 rsvd[24];
+};
+
+/**
+ * struct nvme_rdma_cm_rep - rdma connect reply
+ *
+ * @recfmt: format of the RDMA Private Data
+ * @crqsize: controller receive queue size
+ */
+struct nvme_rdma_cm_rep {
+ __le16 recfmt;
+ __le16 crqsize;
+ u8 rsvd[28];
+};
+
+/**
+ * struct nvme_rdma_cm_rej - rdma connect reject
+ *
+ * @recfmt: format of the RDMA Private Data
+ * @fsts: error status for the associated connect request
+ */
+struct nvme_rdma_cm_rej {
+ __le16 recfmt;
+ __le16 sts;
+};
+
+#endif /* _LINUX_NVME_RDMA_H */
--
2.1.4