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Subject[PATCH 2/2] IB/ehca: SRQ fixes to enable IPoIB CM
Date
a) Report max_srq > 0 if SRQ is supported
b) Report "last wqe reached" event when base QP dies
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
---
drivers/infiniband/hw/ehca/ehca_hca.c | 10 +++++--
drivers/infiniband/hw/ehca/ehca_irq.c | 48 +++++++++++++++++++++-----------
2 files changed, 38 insertions(+), 20 deletions(-)
diff --git a/drivers/infiniband/hw/ehca/ehca_hca.c b/drivers/infiniband/hw/ehca/ehca_hca.c
index fc19ef9..cf22472 100644
--- a/drivers/infiniband/hw/ehca/ehca_hca.c
+++ b/drivers/infiniband/hw/ehca/ehca_hca.c
@@ -93,9 +93,13 @@ int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
props->max_pd = min_t(int, rblock->max_pd, INT_MAX);
props->max_ah = min_t(int, rblock->max_ah, INT_MAX);
props->max_fmr = min_t(int, rblock->max_mr, INT_MAX);
- props->max_srq = 0;
- props->max_srq_wr = 0;
- props->max_srq_sge = 0;
+
+ if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
+ props->max_srq = props->max_qp;
+ props->max_srq_wr = props->max_qp_wr;
+ props->max_srq_sge = 3;
+ }
+
props->max_pkeys = 16;
props->local_ca_ack_delay
= rblock->local_ca_ack_delay;
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
index ee06d8b..a925ea5 100644
--- a/drivers/infiniband/hw/ehca/ehca_irq.c
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -175,41 +175,55 @@ error_data1:

}

-static void qp_event_callback(struct ehca_shca *shca, u64 eqe,
- enum ib_event_type event_type, int fatal)
+static void dispatch_qp_event(struct ehca_shca *shca, struct ehca_qp *qp,
+ enum ib_event_type event_type)
{
struct ib_event event;
- struct ehca_qp *qp;
- u32 token = EHCA_BMASK_GET(EQE_QP_TOKEN, eqe);
-
- read_lock(&ehca_qp_idr_lock);
- qp = idr_find(&ehca_qp_idr, token);
- read_unlock(&ehca_qp_idr_lock);
-
-
- if (!qp)
- return;
-
- if (fatal)
- ehca_error_data(shca, qp, qp->ipz_qp_handle.handle);

event.device = &shca->ib_device;
+ event.event = event_type;

if (qp->ext_type == EQPT_SRQ) {
if (!qp->ib_srq.event_handler)
return;

- event.event = fatal ? IB_EVENT_SRQ_ERR : event_type;
event.element.srq = &qp->ib_srq;
qp->ib_srq.event_handler(&event, qp->ib_srq.srq_context);
} else {
if (!qp->ib_qp.event_handler)
return;

- event.event = event_type;
event.element.qp = &qp->ib_qp;
qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
}
+}
+
+static void qp_event_callback(struct ehca_shca *shca, u64 eqe,
+ enum ib_event_type event_type, int fatal)
+{
+ struct ehca_qp *qp;
+ u32 token = EHCA_BMASK_GET(EQE_QP_TOKEN, eqe);
+
+ read_lock(&ehca_qp_idr_lock);
+ qp = idr_find(&ehca_qp_idr, token);
+ read_unlock(&ehca_qp_idr_lock);
+
+ if (!qp)
+ return;
+
+ if (fatal)
+ ehca_error_data(shca, qp, qp->ipz_qp_handle.handle);
+
+ dispatch_qp_event(shca, qp, fatal && qp->ext_type == EQPT_SRQ ?
+ IB_EVENT_SRQ_ERR : event_type);
+
+ /*
+ * eHCA only processes one WQE at a time for SRQ base QPs,
+ * so the last WQE has been processed as soon as the QP enters
+ * error state.
+ */
+ if (fatal && qp->ext_type == EQPT_SRQBASE)
+ dispatch_qp_event(shca, qp, IB_EVENT_QP_LAST_WQE_REACHED);

return;
}
--
1.5.2

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