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i40iw: Tear-down connection after CQP Modify QP failure

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There is no explicit tear-down sequence initiated on
connections if the Control QP OP, Modify QP to close,
fails. Fix this by triggering a driver generated
Asynchronous Event (AE) on Modify QP failures and
tear-down the connection on receipt of the AE.

This fix can be generalized to other Modify QP failures
(i.e. RTS->TERM, IDLE->RTS, etc) as any modify failure
will require a connection tear-down.

Fixes: d374984179 ("i40iw: add files for iwarp interface")
Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Henry Orosco 2018-03-14 14:45:23 -05:00 committed by Jason Gunthorpe
parent a8b9234b12
commit 546b1452fd
4 changed files with 30 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/infiniband/hw/i40iw/i40iw.h
View File

@ -559,6 +559,7 @@ void i40iw_next_iw_state(struct i40iw_qp *iwqp,
u8 state, u8 del_hash,
u8 term, u8 term_len);
int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack);
int i40iw_send_reset(struct i40iw_cm_node *cm_node);
struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
u16 rem_port,
u32 *rem_addr,

2
drivers/infiniband/hw/i40iw/i40iw_cm.c
View File

@ -539,7 +539,7 @@ static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
* i40iw_send_reset - Send RST packet
* @cm_node: connection's node
*/
static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
int i40iw_send_reset(struct i40iw_cm_node *cm_node)
{
struct i40iw_puda_buf *sqbuf;
int flags = SET_RST | SET_ACK;

2
drivers/infiniband/hw/i40iw/i40iw_hw.c
View File

@ -352,6 +352,8 @@ void i40iw_process_aeq(struct i40iw_device *iwdev)
else
i40iw_cm_disconn(iwqp);
break;
case I40IW_AE_BAD_CLOSE:
/* fall through */
case I40IW_AE_RESET_SENT:
i40iw_next_iw_state(iwqp, I40IW_QP_STATE_ERROR, 1, 0, 0);
i40iw_cm_disconn(iwqp);

35
drivers/infiniband/hw/i40iw/i40iw_verbs.c
View File

@ -831,10 +831,10 @@ static int i40iw_query_qp(struct ib_qp *ibqp,
void i40iw_hw_modify_qp(struct i40iw_device *iwdev, struct i40iw_qp *iwqp,
struct i40iw_modify_qp_info *info, bool wait)
{
enum i40iw_status_code status;
struct i40iw_cqp_request *cqp_request;
struct cqp_commands_info *cqp_info;
struct i40iw_modify_qp_info *m_info;
struct i40iw_gen_ae_info ae_info;
cqp_request = i40iw_get_cqp_request(&iwdev->cqp, wait);
if (!cqp_request)
@ -847,9 +847,25 @@ void i40iw_hw_modify_qp(struct i40iw_device *iwdev, struct i40iw_qp *iwqp,
cqp_info->post_sq = 1;
cqp_info->in.u.qp_modify.qp = &iwqp->sc_qp;
cqp_info->in.u.qp_modify.scratch = (uintptr_t)cqp_request;
status = i40iw_handle_cqp_op(iwdev, cqp_request);
if (status)
i40iw_pr_err("CQP-OP Modify QP fail");
if (!i40iw_handle_cqp_op(iwdev, cqp_request))
return;
switch (m_info->next_iwarp_state) {
case I40IW_QP_STATE_RTS:
if (iwqp->iwarp_state == I40IW_QP_STATE_IDLE)
i40iw_send_reset(iwqp->cm_node);
/* fall through */
case I40IW_QP_STATE_IDLE:
case I40IW_QP_STATE_TERMINATE:
case I40IW_QP_STATE_CLOSING:
ae_info.ae_code = I40IW_AE_BAD_CLOSE;
ae_info.ae_source = 0;
i40iw_gen_ae(iwdev, &iwqp->sc_qp, &ae_info, false);
break;
case I40IW_QP_STATE_ERROR:
default:
break;
}
}
/**
@ -962,10 +978,6 @@ int i40iw_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
iwqp->ibqp_state = attr->qp_state;
if (issue_modify_qp)
iwqp->iwarp_state = info.next_iwarp_state;
else
info.next_iwarp_state = iwqp->iwarp_state;
}
if (attr_mask & IB_QP_ACCESS_FLAGS) {
ctx_info->iwarp_info_valid = true;
@ -1003,9 +1015,14 @@ int i40iw_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
spin_unlock_irqrestore(&iwqp->lock, flags);
if (issue_modify_qp)
if (issue_modify_qp) {
i40iw_hw_modify_qp(iwdev, iwqp, &info, true);
spin_lock_irqsave(&iwqp->lock, flags);
iwqp->iwarp_state = info.next_iwarp_state;
spin_unlock_irqrestore(&iwqp->lock, flags);
}
if (issue_modify_qp && (iwqp->ibqp_state > IB_QPS_RTS)) {
if (dont_wait) {
if (iwqp->cm_id && iwqp->hw_tcp_state) {