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RDMA/nes: Add support for MPAv2 Enhanced RDMA Negotiation

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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>

For backwards compatibility, the MPAv2 enabled driver reverts to MPAv1
if the remote node doesn't support MPAv2.

Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Faisal Latif <Faisal.Latif@intel.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Tatyana Nikolova 2011-09-25 20:17:46 +05:30 committed by Roland Dreier
parent d2fe99e86b
commit 615eb715ae
3 changed files with 703 additions and 475 deletions
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562
drivers/infiniband/hw/nes/nes_cm.c
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File diff suppressed because it is too large Load Diff

67
drivers/infiniband/hw/nes/nes_cm.h
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@ -49,6 +49,15 @@
#define IETF_MPA_VERSION 1
#define IETF_MAX_PRIV_DATA_LEN 512
#define IETF_MPA_FRAME_SIZE 20
#define IETF_RTR_MSG_SIZE 4
#define IETF_MPA_V2_FLAG 0x10
/* IETF RTR MSG Fields */
#define IETF_PEER_TO_PEER 0x8000
#define IETF_FLPDU_ZERO_LEN 0x4000
#define IETF_RDMA0_WRITE 0x8000
#define IETF_RDMA0_READ 0x4000
#define IETF_NO_IRD_ORD 0x3FFF
enum ietf_mpa_flags {
IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */
@ -56,7 +65,7 @@ enum ietf_mpa_flags {
IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */
};
struct ietf_mpa_frame {
struct ietf_mpa_v1 {
u8 key[IETF_MPA_KEY_SIZE];
u8 flags;
u8 rev;
@ -66,6 +75,20 @@ struct ietf_mpa_frame {
#define ietf_mpa_req_resp_frame ietf_mpa_frame
struct ietf_rtr_msg {
__be16 ctrl_ird;
__be16 ctrl_ord;
};
struct ietf_mpa_v2 {
u8 key[IETF_MPA_KEY_SIZE];
u8 flags;
u8 rev;
__be16 priv_data_len;
struct ietf_rtr_msg rtr_msg;
u8 priv_data[0];
};
struct nes_v4_quad {
u32 rsvd0;
__le32 DstIpAdrIndex; /* Only most significant 5 bits are valid */
@ -171,8 +194,7 @@ struct nes_timer_entry {
#define NES_CM_DEF_SEQ2 0x18ed5740
#define NES_CM_DEF_LOCAL_ID2 0xb807
#define MAX_CM_BUFFER (IETF_MPA_FRAME_SIZE + IETF_MAX_PRIV_DATA_LEN)
#define MAX_CM_BUFFER (IETF_MPA_FRAME_SIZE + IETF_RTR_MSG_SIZE + IETF_MAX_PRIV_DATA_LEN)
typedef u32 nes_addr_t;
@ -204,6 +226,21 @@ enum nes_cm_node_state {
NES_CM_STATE_CLOSED
};
enum mpa_frame_version {
IETF_MPA_V1 = 1,
IETF_MPA_V2 = 2
};
enum mpa_frame_key {
MPA_KEY_REQUEST,
MPA_KEY_REPLY
};
enum send_rdma0 {
SEND_RDMA_READ_ZERO = 1,
SEND_RDMA_WRITE_ZERO = 2
};
enum nes_tcpip_pkt_type {
NES_PKT_TYPE_UNKNOWN,
NES_PKT_TYPE_SYN,
@ -245,9 +282,9 @@ struct nes_cm_tcp_context {
enum nes_cm_listener_state {
NES_CM_LISTENER_PASSIVE_STATE=1,
NES_CM_LISTENER_ACTIVE_STATE=2,
NES_CM_LISTENER_EITHER_STATE=3
NES_CM_LISTENER_PASSIVE_STATE = 1,
NES_CM_LISTENER_ACTIVE_STATE = 2,
NES_CM_LISTENER_EITHER_STATE = 3
};
struct nes_cm_listener {
@ -284,15 +321,19 @@ struct nes_cm_node {
struct nes_cm_node *loopbackpartner;
struct nes_timer_entry *send_entry;
spinlock_t retrans_list_lock;
struct nes_timer_entry *recv_entry;
spinlock_t retrans_list_lock;
enum send_rdma0 send_rdma0_op;
int send_write0;
union {
struct ietf_mpa_frame mpa_frame;
struct ietf_mpa_v1 mpa_frame;
struct ietf_mpa_v2 mpa_v2_frame;
u8 mpa_frame_buf[MAX_CM_BUFFER];
};
enum mpa_frame_version mpa_frame_rev;
u16 ird_size;
u16 ord_size;
u16 mpa_frame_size;
struct iw_cm_id *cm_id;
struct list_head list;
@ -399,10 +440,8 @@ struct nes_cm_ops {
struct nes_vnic *, u16, void *,
struct nes_cm_info *);
int (*close)(struct nes_cm_core *, struct nes_cm_node *);
int (*accept)(struct nes_cm_core *, struct ietf_mpa_frame *,
struct nes_cm_node *);
int (*reject)(struct nes_cm_core *, struct ietf_mpa_frame *,
struct nes_cm_node *);
int (*accept)(struct nes_cm_core *, struct nes_cm_node *);
int (*reject)(struct nes_cm_core *, struct nes_cm_node *);
int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
struct sk_buff *);
int (*destroy_cm_core)(struct nes_cm_core *);

3
drivers/infiniband/hw/nes/nes_verbs.h
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@ -139,7 +139,8 @@ struct nes_qp {
struct nes_cq *nesrcq;
struct nes_pd *nespd;
void *cm_node; /* handle of the node this QP is associated with */
struct ietf_mpa_frame *ietf_frame;
void *ietf_frame;
u8 ietf_frame_size;
dma_addr_t ietf_frame_pbase;
struct ib_mr *lsmm_mr;
struct nes_hw_qp hwqp;