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qed: iWARP implement disconnect flows

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This patch takes care of active/passive disconnect flows.
Disconnect flows can be initiated remotely, in which case a async event
will arrive from peer and indicated to qedr driver. These
are referred to as exceptions. When a QP is destroyed, it needs to check
that it's associated ep has been closed.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kalderon, Michal 2017-07-02 10:29:29 +03:00 committed by David S. Miller
parent 4b0fdd7c8b
commit fc4c6065e6
2 changed files with 91 additions and 1 deletions
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90
drivers/net/ethernet/qlogic/qed/qed_iwarp.c
View File

@ -496,6 +496,8 @@ static void qed_iwarp_destroy_ep(struct qed_hwfn *p_hwfn,
int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
{
struct qed_iwarp_ep *ep = qp->ep;
int wait_count = 0;
int rc = 0;
if (qp->iwarp_state != QED_IWARP_QP_STATE_ERROR) {
@ -505,6 +507,18 @@ int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp)
return rc;
}
/* Make sure ep is closed before returning and freeing memory. */
if (ep) {
while (ep->state != QED_IWARP_EP_CLOSED && wait_count++ < 200)
msleep(100);
if (ep->state != QED_IWARP_EP_CLOSED)
DP_NOTICE(p_hwfn, "ep state close timeout state=%x\n",
ep->state);
qed_iwarp_destroy_ep(p_hwfn, ep, false);
}
rc = qed_iwarp_fw_destroy(p_hwfn, qp);
if (qp->shared_queue)
@ -1956,6 +1970,61 @@ int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
return qed_iwarp_ll2_stop(p_hwfn, p_ptt);
}
void qed_iwarp_qp_in_error(struct qed_hwfn *p_hwfn,
struct qed_iwarp_ep *ep, u8 fw_return_code)
{
struct qed_iwarp_cm_event_params params;
qed_iwarp_modify_qp(p_hwfn, ep->qp, QED_IWARP_QP_STATE_ERROR, true);
params.event = QED_IWARP_EVENT_CLOSE;
params.ep_context = ep;
params.cm_info = &ep->cm_info;
params.status = (fw_return_code == IWARP_QP_IN_ERROR_GOOD_CLOSE) ?
0 : -ECONNRESET;
ep->state = QED_IWARP_EP_CLOSED;
spin_lock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
list_del(&ep->list_entry);
spin_unlock_bh(&p_hwfn->p_rdma_info->iwarp.iw_lock);
ep->event_cb(ep->cb_context, &params);
}
void qed_iwarp_exception_received(struct qed_hwfn *p_hwfn,
struct qed_iwarp_ep *ep, int fw_ret_code)
{
struct qed_iwarp_cm_event_params params;
bool event_cb = false;
DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "EP(0x%x) fw_ret_code=%d\n",
ep->cid, fw_ret_code);
switch (fw_ret_code) {
case IWARP_EXCEPTION_DETECTED_LLP_CLOSED:
params.status = 0;
params.event = QED_IWARP_EVENT_DISCONNECT;
event_cb = true;
break;
case IWARP_EXCEPTION_DETECTED_LLP_RESET:
params.status = -ECONNRESET;
params.event = QED_IWARP_EVENT_DISCONNECT;
event_cb = true;
break;
default:
DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
"Unhandled exception received...fw_ret_code=%d\n",
fw_ret_code);
break;
}
if (event_cb) {
params.ep_context = ep;
params.cm_info = &ep->cm_info;
ep->event_cb(ep->cb_context, &params);
}
}
void
qed_iwarp_connect_complete(struct qed_hwfn *p_hwfn,
struct qed_iwarp_ep *ep, u8 fw_return_code)
@ -2009,8 +2078,27 @@ static int qed_iwarp_async_event(struct qed_hwfn *p_hwfn,
ep->tcp_cid, fw_return_code);
qed_iwarp_connect_complete(p_hwfn, ep, fw_return_code);
break;
/* Async event for active side only */
case IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED:
if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
return -EINVAL;
DP_VERBOSE(p_hwfn,
QED_MSG_RDMA,
"QP(0x%x) IWARP_EVENT_TYPE_ASYNC_EXCEPTION_DETECTED fw_ret_code=%d\n",
ep->cid, fw_return_code);
qed_iwarp_exception_received(p_hwfn, ep, fw_return_code);
break;
case IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE:
/* Async completion for Close Connection ramrod */
if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
return -EINVAL;
DP_VERBOSE(p_hwfn,
QED_MSG_RDMA,
"QP(0x%x) IWARP_EVENT_TYPE_ASYNC_QP_IN_ERROR_STATE fw_ret_code=%d\n",
ep->cid, fw_return_code);
qed_iwarp_qp_in_error(p_hwfn, ep, fw_return_code);
break;
case IWARP_EVENT_TYPE_ASYNC_ENHANCED_MPA_REPLY_ARRIVED:
/* Async event for active side only */
if (!qed_iwarp_check_ep_ok(p_hwfn, ep))
return -EINVAL;
DP_VERBOSE(p_hwfn,

2
include/linux/qed/qed_rdma_if.h
View File

@ -474,6 +474,8 @@ enum qed_iwarp_event_type {
QED_IWARP_EVENT_MPA_REQUEST, /* Passive side request received */
QED_IWARP_EVENT_PASSIVE_COMPLETE, /* ack on mpa response */
QED_IWARP_EVENT_ACTIVE_COMPLETE, /* Active side reply received */
QED_IWARP_EVENT_DISCONNECT,
QED_IWARP_EVENT_CLOSE,
QED_IWARP_EVENT_ACTIVE_MPA_REPLY,
};