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IB/rdmavt: Add trace and error print statements in post_one_wr
These trace and error print statements would help in debugging issues which are caused due to messed up QP ring buffer pointers. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Harish Chegondi <harish.chegondi@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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2 changed files with 77 additions and 1 deletions
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@ -1441,7 +1441,12 @@ static int rvt_post_one_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
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/* check for avail */
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if (unlikely(!qp->s_avail)) {
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qp->s_avail = qp_get_savail(qp);
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WARN_ON(qp->s_avail > (qp->s_size - 1));
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if (WARN_ON(qp->s_avail > (qp->s_size - 1)))
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rvt_pr_err(rdi,
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"More avail entries than QP RB size.\nQP: %u, size: %u, avail: %u\nhead: %u, tail: %u, cur: %u, acked: %u, last: %u",
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qp->ibqp.qp_num, qp->s_size, qp->s_avail,
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qp->s_head, qp->s_tail, qp->s_cur,
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qp->s_acked, qp->s_last);
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if (!qp->s_avail)
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return -ENOMEM;
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}
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@ -1510,6 +1515,7 @@ static int rvt_post_one_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
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wqe->lpsn = wqe->psn +
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(wqe->length ? ((wqe->length - 1) >> log_pmtu) : 0);
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qp->s_next_psn = wqe->lpsn + 1;
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trace_rvt_post_one_wr(qp, wqe);
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smp_wmb(); /* see request builders */
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qp->s_avail--;
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qp->s_head = next;
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@ -54,6 +54,7 @@
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#include <linux/tracepoint.h>
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#include <linux/trace_seq.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_vt.h>
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#define RDI_DEV_ENTRY(rdi) __string(dev, rdi->driver_f.get_card_name(rdi))
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@ -108,6 +109,75 @@ DEFINE_EVENT(rvt_qphash_template, rvt_qpremove,
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TP_PROTO(struct rvt_qp *qp, u32 bucket),
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TP_ARGS(qp, bucket));
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM rvt_tx
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#define wr_opcode_name(opcode) { IB_WR_##opcode, #opcode }
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#define show_wr_opcode(opcode) \
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__print_symbolic(opcode, \
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wr_opcode_name(RDMA_WRITE), \
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wr_opcode_name(RDMA_WRITE_WITH_IMM), \
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wr_opcode_name(SEND), \
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wr_opcode_name(SEND_WITH_IMM), \
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wr_opcode_name(RDMA_READ), \
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wr_opcode_name(ATOMIC_CMP_AND_SWP), \
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wr_opcode_name(ATOMIC_FETCH_AND_ADD), \
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wr_opcode_name(LSO), \
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wr_opcode_name(SEND_WITH_INV), \
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wr_opcode_name(RDMA_READ_WITH_INV), \
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wr_opcode_name(LOCAL_INV), \
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wr_opcode_name(MASKED_ATOMIC_CMP_AND_SWP), \
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wr_opcode_name(MASKED_ATOMIC_FETCH_AND_ADD))
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#define POS_PRN \
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"[%s] wr_id %llx qpn %x psn 0x%x lpsn 0x%x length %u opcode 0x%.2x,%s size %u avail %u head %u last %u"
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TRACE_EVENT(
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rvt_post_one_wr,
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TP_PROTO(struct rvt_qp *qp, struct rvt_swqe *wqe),
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TP_ARGS(qp, wqe),
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TP_STRUCT__entry(
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RDI_DEV_ENTRY(ib_to_rvt(qp->ibqp.device))
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__field(u64, wr_id)
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__field(u32, qpn)
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__field(u32, psn)
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__field(u32, lpsn)
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__field(u32, length)
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__field(u32, opcode)
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__field(u32, size)
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__field(u32, avail)
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__field(u32, head)
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__field(u32, last)
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),
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TP_fast_assign(
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RDI_DEV_ASSIGN(ib_to_rvt(qp->ibqp.device))
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__entry->wr_id = wqe->wr.wr_id;
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__entry->qpn = qp->ibqp.qp_num;
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__entry->psn = wqe->psn;
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__entry->lpsn = wqe->lpsn;
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__entry->length = wqe->length;
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__entry->opcode = wqe->wr.opcode;
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__entry->size = qp->s_size;
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__entry->avail = qp->s_avail;
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__entry->head = qp->s_head;
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__entry->last = qp->s_last;
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),
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TP_printk(
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POS_PRN,
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__get_str(dev),
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__entry->wr_id,
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__entry->qpn,
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__entry->psn,
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__entry->lpsn,
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__entry->length,
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__entry->opcode, show_wr_opcode(__entry->opcode),
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__entry->size,
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__entry->avail,
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__entry->head,
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__entry->last
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)
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);
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#endif /* __RDMAVT_TRACE_H */
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#undef TRACE_INCLUDE_PATH
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