RDMA/bnxt_re: Get the toggle bits from SRQ events

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 <[e-mail]>
Signed-off-by: Chandramohan Akula <[e-mail]>
Signed-off-by: Selvin Xavier <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Leon Romanovsky <[e-mail]>

drivers/infiniband/hw/bnxt_re/ib_verbs.h

···
 	struct bnxt_qplib_srq	qplib_srq;
 	struct ib_umem		*umem;
 	spinlock_t		lock;		/* protect srq */
+	void			*uctx_srq_page;
 };
 
 struct bnxt_re_qp {

drivers/infiniband/hw/bnxt_re/qplib_fp.c

···
 #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);
 
···
 		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;
 
···
 			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,

drivers/infiniband/hw/bnxt_re/qplib_fp.h

···
 	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 {