[PATCH for-next 1/3] RDMA/bnxt_re: Get the toggle bits from SRQ events

[Selvin Xavier <selvin.xavier@broadcom.com>]

From: Hongguang Gao <hongguang.gao@broadcom.com>

SRQ arming requires the toggle bits received from hardware.
Get the toggle bits from SRQ notification for the
gen p7 adapters. This value will be zero for the older adapters.

Signed-off-by: Hongguang Gao <hongguang.gao@broadcom.com>
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.h |  1 +
 drivers/infiniband/hw/bnxt_re/qplib_fp.c | 11 +++++++++++
 drivers/infiniband/hw/bnxt_re/qplib_fp.h |  1 +
 3 files changed, 13 insertions(+)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
index 3ddeda3..4e113b9 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
@@ -77,6 +77,7 @@ struct bnxt_re_srq {
 	struct bnxt_qplib_srq	qplib_srq;
 	struct ib_umem		*umem;
 	spinlock_t		lock;		/* protect srq */
+	void			*uctx_srq_page;
 };
 
 struct bnxt_re_qp {
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index 49e4a4a..19bb453 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -54,6 +54,10 @@
 #include "qplib_rcfw.h"
 #include "qplib_sp.h"
 #include "qplib_fp.h"
+#include <rdma/ib_addr.h>
+#include "bnxt_ulp.h"
+#include "bnxt_re.h"
+#include "ib_verbs.h"
 
 static void __clean_cq(struct bnxt_qplib_cq *cq, u64 qp);
 
@@ -347,6 +351,7 @@ static void bnxt_qplib_service_nq(struct tasklet_struct *t)
 		case NQ_BASE_TYPE_SRQ_EVENT:
 		{
 			struct bnxt_qplib_srq *srq;
+			struct bnxt_re_srq *srq_p;
 			struct nq_srq_event *nqsrqe =
 						(struct nq_srq_event *)nqe;
 
@@ -354,6 +359,12 @@ static void bnxt_qplib_service_nq(struct tasklet_struct *t)
 			q_handle |= (u64)le32_to_cpu(nqsrqe->srq_handle_high)
 				     << 32;
 			srq = (struct bnxt_qplib_srq *)q_handle;
+			srq->toggle = (le16_to_cpu(nqe->info10_type) & NQ_CN_TOGGLE_MASK)
+				      >> NQ_CN_TOGGLE_SFT;
+			srq->dbinfo.toggle = srq->toggle;
+			srq_p = container_of(srq, struct bnxt_re_srq, qplib_srq);
+			if (srq_p->uctx_srq_page)
+				*((u32 *)srq_p->uctx_srq_page) = srq->toggle;
 			bnxt_qplib_armen_db(&srq->dbinfo,
 					    DBC_DBC_TYPE_SRQ_ARMENA);
 			if (nq->srqn_handler(nq,
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
index 56538b9..e714caa 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
@@ -105,6 +105,7 @@ struct bnxt_qplib_srq {
 	struct bnxt_qplib_sg_info	sg_info;
 	u16				eventq_hw_ring_id;
 	spinlock_t			lock; /* protect SRQE link list */
+	u8				toggle;
 };
 
 struct bnxt_qplib_sge {
-- 
2.5.5