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authorSagi Grimberg <sagi@grimberg.me>2016-07-06 21:55:50 +0900
committerJens Axboe <axboe@fb.com>2016-07-08 08:38:49 -0600
commit931a6de4d734de6142142c82555e3f017adcb9f0 (patch)
tree35c2cb77f9766a5dc8870929a1ccf171e02b5750 /include/linux/nvme-rdma.h
parentdef61eca9632af0559931f047c49d2762401857c (diff)
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nvme-rdma.h: Add includes for nvme rdma_cm negotiation
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> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/nvme-rdma.h')
-rw-r--r--include/linux/nvme-rdma.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/include/linux/nvme-rdma.h b/include/linux/nvme-rdma.h
new file mode 100644
index 000000000000..bf240a3cbf99
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+++ 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 */