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authorOr Gerlitz <ogerlitz@mellanox.com>2013-05-01 13:25:27 +0000
committerRoland Dreier <roland@purestorage.com>2013-05-01 17:34:14 -0700
commit8d8399deb0434df6efb3a54a0efeac677e310fc1 (patch)
tree20623c0b993f1eda9d179e21e24fd49495ce7e45 /drivers/infiniband/ulp/iser/iscsi_iser.h
parent450d1e40d597dd71843457c73d372c4b4f2a83eb (diff)
downloadvexpress-lsk-8d8399deb0434df6efb3a54a0efeac677e310fc1.tar.gz
IB/iser: Add support for iser CM REQ additional info
Annex A12 of the IBTA spec defines additional information that needs to be provided through the CM exchange relating to usage of ZBVA (Zero Based VAs) and Send With Invalidate over an iSER connection. Currently, the initiator sets both to not supported, but does provide the header so that existing iSER targets can be patched to start looking on the private data carried by the CM. This is a preparation step to enable iSER with HW drivers for which FMRs are not supported, such as mlx4 VF instances or new HW devices which might support only FRWR (Fast Registration Work-Requests) along the details of the IB_DEVICE_MEM_MGT_EXTENSIONS device capability. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.h')
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 1a570886cc0..06f578cde75 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -140,6 +140,15 @@ struct iser_hdr {
__be64 read_va;
} __attribute__((packed));
+
+#define ISER_ZBVA_NOT_SUPPORTED 0x80
+#define ISER_SEND_W_INV_NOT_SUPPORTED 0x40
+
+struct iser_cm_hdr {
+ u8 flags;
+ u8 rsvd[3];
+} __packed;
+
/* Constant PDU lengths calculations */
#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))