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RDMA/nes: CM connection setup/teardown rework 

Major rework of CM connection setup/teardown.  We had a number of issues
with MPI applications not starting/terminating properly over time.
With these changes we were able to run longer on larger clusters.

* Remove memory allocation from nes_connect() and nes_cm_connect().
* Fix mini_cm_dec_refcnt_listen() when destroying listener.
* Remove unnecessary code from schedule_nes_timer() and nes_cm_timer_tick().
* Functionalize mini_cm_recv_pkt() and process_packet().
* Clean up cm_node->ref_count usage.
* Reuse skbs if available.

Signed-off-by: Faisal Latif <flatif@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Faisal Latif 2008-07-24 20:50:45 -07:00 committed by Roland Dreier
parent fb2e405fc1
commit 6492cdf3a2
5 changed files with 1166 additions and 939 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/hw/nes/nes.c
View File

@ -276,6 +276,7 @@ static void nes_cqp_rem_ref_callback(struct nes_device *nesdev, struct nes_cqp_r
}
nes_free_resource(nesadapter, nesadapter->allocated_qps, nesqp->hwqp.qp_id);
nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
kfree(nesqp->allocated_buffer);
}
@ -289,7 +290,6 @@ void nes_rem_ref(struct ib_qp *ibqp)
struct nes_qp *nesqp;
struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
u32 opcode;
@ -303,8 +303,6 @@ void nes_rem_ref(struct ib_qp *ibqp)
}
if (atomic_dec_and_test(&nesqp->refcount)) {
nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
/* Destroy the QP */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {

1664
drivers/infiniband/hw/nes/nes_cm.c
View File

File diff suppressed because it is too large Load Diff

23
drivers/infiniband/hw/nes/nes_cm.h
View File

@ -83,6 +83,8 @@ enum nes_timer_type {
#define SET_FIN 4
#define SET_RST 8
#define TCP_OPTIONS_PADDING 3
struct option_base {
u8 optionnum;
u8 length;
@ -177,6 +179,7 @@ enum nes_cm_node_state {
NES_CM_STATE_ESTABLISHED,
NES_CM_STATE_ACCEPTING,
NES_CM_STATE_MPAREQ_SENT,
NES_CM_STATE_MPAREQ_RCVD,
NES_CM_STATE_TSA,
NES_CM_STATE_FIN_WAIT1,
NES_CM_STATE_FIN_WAIT2,
@ -187,6 +190,16 @@ enum nes_cm_node_state {
NES_CM_STATE_CLOSED
};
enum nes_tcpip_pkt_type {
NES_PKT_TYPE_UNKNOWN,
NES_PKT_TYPE_SYN,
NES_PKT_TYPE_SYNACK,
NES_PKT_TYPE_ACK,
NES_PKT_TYPE_FIN,
NES_PKT_TYPE_RST
};
/* type of nes connection */
enum nes_cm_conn_type {
NES_CM_IWARP_CONN_TYPE,
@ -257,7 +270,9 @@ struct nes_cm_node {
struct net_device *netdev;
struct nes_cm_node *loopbackpartner;
struct list_head retrans_list;
struct nes_timer_entry *send_entry;
spinlock_t retrans_list_lock;
struct list_head recv_list;
spinlock_t recv_list_lock;
@ -276,6 +291,8 @@ struct nes_cm_node {
struct nes_vnic *nesvnic;
int apbvt_set;
int accept_pend;
int freed;
struct nes_qp *nesqp;
};
/* structure for client or CM to fill when making CM api calls. */
@ -366,14 +383,14 @@ struct nes_cm_ops {
struct nes_cm_info *);
int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *);
struct nes_cm_node * (*connect)(struct nes_cm_core *,
struct nes_vnic *, struct ietf_mpa_frame *,
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 (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
void (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
struct sk_buff *);
int (*destroy_cm_core)(struct nes_cm_core *);
int (*get)(struct nes_cm_core *);

9
drivers/infiniband/hw/nes/nes_hw.c
View File

@ -2814,7 +2814,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
nesqp = *((struct nes_qp **)&context);
if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
nesqp->cm_id->add_ref(nesqp->cm_id);
nes_add_ref(&nesqp->ibqp);
schedule_nes_timer(nesqp->cm_node, (struct sk_buff *)nesqp,
NES_TIMER_TYPE_CLOSE, 1, 0);
nes_debug(NES_DBG_AEQ, "QP%u Not decrementing QP refcount (%d),"
@ -2838,7 +2837,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
if (async_event_id == NES_AEQE_AEID_RESET_SENT) {
tcp_state = NES_AEQE_TCP_STATE_CLOSED;
}
nes_add_ref(&nesqp->ibqp);
spin_lock_irqsave(&nesqp->lock, flags);
nesqp->hw_iwarp_state = iwarp_state;
nesqp->hw_tcp_state = tcp_state;
@ -2876,7 +2874,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
}
spin_unlock_irqrestore(&nesqp->lock, flags);
if (next_iwarp_state) {
nes_add_ref(&nesqp->ibqp);
nes_debug(NES_DBG_AEQ, "issuing hw modifyqp for QP%u. next state = 0x%08X,"
" also added another reference\n",
nesqp->hwqp.qp_id, next_iwarp_state);
@ -2888,7 +2885,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
/* FIN Received but ib state not RTS,
close complete will be on its way */
spin_unlock_irqrestore(&nesqp->lock, flags);
nes_rem_ref(&nesqp->ibqp);
return;
}
spin_unlock_irqrestore(&nesqp->lock, flags);
@ -2922,7 +2918,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
if ((tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
((nesqp->ibqp_state == IB_QPS_RTS)&&
(async_event_id == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
nes_add_ref(&nesqp->ibqp);
nes_cm_disconn(nesqp);
} else {
nesqp->in_disconnect = 0;
@ -2931,7 +2926,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
break;
case NES_AEQE_AEID_LLP_TOO_MANY_RETRIES:
nesqp = *((struct nes_qp **)&context);
nes_add_ref(&nesqp->ibqp);
spin_lock_irqsave(&nesqp->lock, flags);
nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
@ -3042,7 +3036,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
}
/* tell cm to disconnect, cm will queue work to thread */
nes_add_ref(&nesqp->ibqp);
nes_cm_disconn(nesqp);
break;
case NES_AEQE_AEID_DDP_UBE_INVALID_MSN_NO_BUFFER_AVAILABLE:
@ -3062,7 +3055,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
}
/* tell cm to disconnect, cm will queue work to thread */
nes_add_ref(&nesqp->ibqp);
nes_cm_disconn(nesqp);
break;
case NES_AEQE_AEID_LLP_RECEIVED_MPA_CRC_ERROR:
@ -3082,7 +3074,6 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
}
/* tell cm to disconnect, cm will queue work to thread */
nes_add_ref(&nesqp->ibqp);
nes_cm_disconn(nesqp);
break;
/* TODO: additional AEs need to be here */

15
drivers/infiniband/hw/nes/nes_verbs.c
View File

@ -2867,7 +2867,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
nesqp->iwarp_state, atomic_read(&nesqp->refcount));
nes_add_ref(&nesqp->ibqp);
spin_lock_irqsave(&nesqp->lock, qplockflags);
nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
@ -2882,7 +2881,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
@ -2893,7 +2891,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
@ -2904,14 +2901,12 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
if (nesqp->cm_id == NULL) {
nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
nesqp->hwqp.qp_id );
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
@ -2929,7 +2924,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return 0;
} else {
if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
@ -2937,7 +2931,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
" ignored due to current iWARP state\n",
nesqp->hwqp.qp_id);
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
@ -2969,7 +2962,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
/* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
@ -2982,7 +2974,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
case IB_QPS_RESET:
if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
@ -3008,7 +2999,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
break;
default:
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
break;
}
@ -3088,7 +3078,6 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
/* this one is for the cm_disconnect thread */
nes_add_ref(&nesqp->ibqp);
spin_lock_irqsave(&nesqp->lock, qplockflags);
nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
@ -3097,14 +3086,12 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
} else {
nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
nes_rem_ref(&nesqp->ibqp);
}
} else {
spin_lock_irqsave(&nesqp->lock, qplockflags);
if (nesqp->cm_id) {
/* These two are for the timer thread */
if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
nes_add_ref(&nesqp->ibqp);
nesqp->cm_id->add_ref(nesqp->cm_id);
nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
" need ae to finish up, original_last_aeq = 0x%04X."
@ -3128,14 +3115,12 @@ int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
" original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
nes_rem_ref(&nesqp->ibqp);
}
} else {
nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
" original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
nes_rem_ref(&nesqp->ibqp);
}
err = 0;