RDMA/cxgb4: Add support for MPAv2 Enhanced RDMA Negotiation
This patch adds support for Enhanced RDMA Connection Establishment
(draft-ietf-storm-mpa-peer-connect-06), aka MPAv2. Details of draft
can be obtained from:
<http://www.ietf.org/id/draft-ietf-storm-mpa-peer-connect-06.txt>
The patch updates the following functions for initiator perspective:
- send_mpa_request
- process_mpa_reply
- post_terminate for TERM error codes
- destroy_qp for TERM related change
- adds layer/etype/ecode to c4iw_qp_attrs for sending with TERM
- peer_abort for retrying connection attempt with MPA_v1 message
- added c4iw_reconnect function
The patch updates the following functions for responder perspective:
- process_mpa_request
- send_mpa_reply
- c4iw_accept_cr
- passes ird/ord to upper layers
Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
index 4f04537..62cea0e 100644
--- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
+++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
@@ -323,6 +323,7 @@
u8 recv_marker_enabled;
u8 xmit_marker_enabled;
u8 crc_enabled;
+ u8 enhanced_rdma_conn;
u8 version;
u8 p2p_type;
};
@@ -349,6 +350,8 @@
u8 is_terminate_local;
struct c4iw_mpa_attributes mpa_attr;
struct c4iw_ep *llp_stream_handle;
+ u8 layer_etype;
+ u8 ecode;
};
struct c4iw_qp {
@@ -501,11 +504,18 @@
#define MPA_KEY_REP "MPA ID Rep Frame"
#define MPA_MAX_PRIVATE_DATA 256
+#define MPA_ENHANCED_RDMA_CONN 0x10
#define MPA_REJECT 0x20
#define MPA_CRC 0x40
#define MPA_MARKERS 0x80
#define MPA_FLAGS_MASK 0xE0
+#define MPA_V2_PEER2PEER_MODEL 0x8000
+#define MPA_V2_ZERO_LEN_FPDU_RTR 0x4000
+#define MPA_V2_RDMA_WRITE_RTR 0x8000
+#define MPA_V2_RDMA_READ_RTR 0x4000
+#define MPA_V2_IRD_ORD_MASK 0x3FFF
+
#define c4iw_put_ep(ep) { \
PDBG("put_ep (via %s:%u) ep %p refcnt %d\n", __func__, __LINE__, \
ep, atomic_read(&((ep)->kref.refcount))); \
@@ -528,6 +538,11 @@
u8 private_data[0];
};
+struct mpa_v2_conn_params {
+ __be16 ird;
+ __be16 ord;
+};
+
struct terminate_message {
u8 layer_etype;
u8 ecode;
@@ -580,7 +595,10 @@
enum c4iw_mpa_ecodes {
MPA_CRC_ERR = 0x02,
- MPA_MARKER_ERR = 0x03
+ MPA_MARKER_ERR = 0x03,
+ MPA_LOCAL_CATA = 0x05,
+ MPA_INSUFF_IRD = 0x06,
+ MPA_NOMATCH_RTR = 0x07,
};
enum c4iw_ep_state {
@@ -651,6 +669,8 @@
u16 txq_idx;
u16 ctrlq_idx;
u8 tos;
+ u8 retry_with_mpa_v1;
+ u8 tried_with_mpa_v1;
};
static inline struct c4iw_ep *to_ep(struct iw_cm_id *cm_id)