[PATCH v4 for-next 07/24] RDMA/hfi2: Add in trace support

Adds the base trace event support for the driver.

Co-developed-by: Dean Luick <[email protected]>
Signed-off-by: Dean Luick <[email protected]>
Co-developed-by: Bendan Cunningham <[email protected]>
Signed-off-by: Breandan Cunningham <[email protected]>
Assisted-by: Claude:claude-sonnet-4-5
Signed-off-by: Dennis Dalessandro <[email protected]>
---
 drivers/infiniband/hw/hfi2/trace.c |  536 ++++++++++++++++++++++++++++++++++++
 1 file changed, 536 insertions(+)
 create mode 100644 drivers/infiniband/hw/hfi2/trace.c

diff --git a/drivers/infiniband/hw/hfi2/trace.c b/drivers/infiniband/hw/hfi2/trace.c
new file mode 100644
index 000000000000..c9c5e8687a60
--- /dev/null
+++ b/drivers/infiniband/hw/hfi2/trace.c
@@ -0,0 +1,536 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright(c) 2015 - 2020 Intel Corporation.
+ * Copyright(c) 2025-2026 Cornelis Networks, Inc.
+ */
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+#include "exp_rcv.h"
+#include "ipoib.h"
+
+static u8 __get_ib_hdr_len(struct ib_header *hdr)
+{
+	struct ib_other_headers *ohdr;
+	u8 opcode;
+
+	if (ib_get_lnh(hdr) == HFI2_LRH_BTH)
+		ohdr = &hdr->u.oth;
+	else
+		ohdr = &hdr->u.l.oth;
+	opcode = ib_bth_get_opcode(ohdr);
+	return hfi2_hdr_len_by_opcode[opcode] == 0 ?
+	       0 : hfi2_hdr_len_by_opcode[opcode] - (12 + 8);
+}
+
+static u8 __get_16b_hdr_len(struct hfi2_16b_header *hdr)
+{
+	struct ib_other_headers *ohdr = NULL;
+	u8 opcode;
+	u8 l4 = hfi2_16B_get_l4(hdr);
+
+	if (l4 == OPA_16B_L4_FM) {
+		opcode = IB_OPCODE_UD_SEND_ONLY;
+		return (8 + 8); /* No BTH */
+	}
+
+	if (l4 == OPA_16B_L4_IB_LOCAL)
+		ohdr = &hdr->u.oth;
+	else
+		ohdr = &hdr->u.l.oth;
+
+	opcode = ib_bth_get_opcode(ohdr);
+	return hfi2_hdr_len_by_opcode[opcode] == 0 ?
+	       0 : hfi2_hdr_len_by_opcode[opcode] - (12 + 8 + 8);
+}
+
+u8 hfi2_trace_packet_hdr_len(struct hfi2_packet *packet)
+{
+	if (packet->etype != RHF_RCV_TYPE_BYPASS)
+		return __get_ib_hdr_len(packet->hdr);
+	else
+		return __get_16b_hdr_len(packet->hdr);
+}
+
+u8 hfi2_trace_opa_hdr_len(struct hfi2_opa_header *opa_hdr)
+{
+	if (!opa_hdr->hdr_type)
+		return __get_ib_hdr_len(&opa_hdr->ibh);
+	else
+		return __get_16b_hdr_len(&opa_hdr->opah);
+}
+
+const char *hfi2_trace_get_packet_l4_str(u8 l4)
+{
+	if (l4)
+		return "16B";
+	else
+		return "9B";
+}
+
+const char *hfi2_trace_get_packet_l2_str(u8 l2)
+{
+	switch (l2) {
+	case 0:
+		return "0";
+	case 1:
+		return "1";
+	case 2:
+		return "16B";
+	case 3:
+		return "9B";
+	}
+	return "";
+}
+
+#define IMM_PRN  "imm:%d"
+#define RETH_PRN "reth vaddr:0x%.16llx rkey:0x%.8x dlen:0x%.8x"
+#define AETH_PRN "aeth syn:0x%.2x %s msn:0x%.8x"
+#define DETH_PRN "deth qkey:0x%.8x sqpn:0x%.6x"
+#define DETH_ENTROPY_PRN "deth qkey:0x%.8x sqpn:0x%.6x entropy:0x%.2x"
+#define IETH_PRN "ieth rkey:0x%.8x"
+#define ATOMICACKETH_PRN "origdata:%llx"
+#define ATOMICETH_PRN "vaddr:0x%llx rkey:0x%.8x sdata:%llx cdata:%llx"
+#define TID_RDMA_KDETH "kdeth0 0x%x kdeth1 0x%x"
+#define TID_RDMA_KDETH_DATA "kdeth0 0x%x: kver %u sh %u intr %u tidctrl %u tid %x offset %x kdeth1 0x%x: jkey %x"
+#define TID_READ_REQ_PRN "tid_flow_psn 0x%x tid_flow_qp 0x%x verbs_qp 0x%x"
+#define TID_READ_RSP_PRN "verbs_qp 0x%x"
+#define TID_WRITE_REQ_PRN "original_qp 0x%x"
+#define TID_WRITE_RSP_PRN "tid_flow_psn 0x%x tid_flow_qp 0x%x verbs_qp 0x%x"
+#define TID_WRITE_DATA_PRN "verbs_qp 0x%x"
+#define TID_ACK_PRN "tid_flow_psn 0x%x verbs_psn 0x%x tid_flow_qp 0x%x verbs_qp 0x%x"
+#define TID_RESYNC_PRN "verbs_qp 0x%x"
+
+#define OP(transport, op) IB_OPCODE_## transport ## _ ## op
+
+static const char *parse_syndrome(u8 syndrome)
+{
+	switch (syndrome >> 5) {
+	case 0:
+		return "ACK";
+	case 1:
+		return "RNRNAK";
+	case 3:
+		return "NAK";
+	}
+	return "";
+}
+
+void hfi2_trace_parse_9b_bth(struct ib_other_headers *ohdr,
+			     u8 *ack, bool *becn, bool *fecn, u8 *mig,
+			     u8 *se, u8 *pad, u8 *opcode, u8 *tver,
+			     u16 *pkey, u32 *psn, u32 *qpn)
+{
+	*ack = ib_bth_get_ackreq(ohdr);
+	*becn = ib_bth_get_becn(ohdr);
+	*fecn = ib_bth_get_fecn(ohdr);
+	*mig = ib_bth_get_migreq(ohdr);
+	*se = ib_bth_get_se(ohdr);
+	*pad = ib_bth_get_pad(ohdr);
+	*opcode = ib_bth_get_opcode(ohdr);
+	*tver = ib_bth_get_tver(ohdr);
+	*pkey = ib_bth_get_pkey(ohdr);
+	*psn = mask_psn(ib_bth_get_psn(ohdr));
+	*qpn = ib_bth_get_qpn(ohdr);
+}
+
+void hfi2_trace_parse_16b_bth(struct ib_other_headers *ohdr,
+			      u8 *ack, u8 *mig, u8 *opcode,
+			      u8 *pad, u8 *se, u8 *tver,
+			      u32 *psn, u32 *qpn)
+{
+	*ack = ib_bth_get_ackreq(ohdr);
+	*mig = ib_bth_get_migreq(ohdr);
+	*opcode = ib_bth_get_opcode(ohdr);
+	*pad = ib_bth_get_pad(ohdr);
+	*se = ib_bth_get_se(ohdr);
+	*tver = ib_bth_get_tver(ohdr);
+	*psn = mask_psn(ib_bth_get_psn(ohdr));
+	*qpn = ib_bth_get_qpn(ohdr);
+}
+
+void hfi2_trace_parse_9b_hdr(struct ib_header *hdr, bool sc5,
+			     u8 *lnh, u8 *lver, u8 *sl, u8 *sc,
+			     u16 *len, u32 *dlid, u32 *slid)
+{
+	*lnh = ib_get_lnh(hdr);
+	*lver = ib_get_lver(hdr);
+	*sl = ib_get_sl(hdr);
+	*sc = ib_get_sc(hdr) | (sc5 << 4);
+	*len = ib_get_len(hdr);
+	*dlid = ib_get_dlid(hdr);
+	*slid = ib_get_slid(hdr);
+}
+
+void hfi2_trace_parse_16b_hdr(struct hfi2_16b_header *hdr,
+			      u8 *age, bool *becn, bool *fecn,
+			      u8 *l4, u8 *rc, u8 *sc,
+			      u16 *entropy, u16 *len, u16 *pkey,
+			      u32 *dlid, u32 *slid)
+{
+	*age = hfi2_16B_get_age(hdr);
+	*becn = hfi2_16B_get_becn(hdr);
+	*fecn = hfi2_16B_get_fecn(hdr);
+	*l4 = hfi2_16B_get_l4(hdr);
+	*rc = hfi2_16B_get_rc(hdr);
+	*sc = hfi2_16B_get_sc(hdr);
+	*entropy = hfi2_16B_get_entropy(hdr);
+	*len = hfi2_16B_get_len(hdr);
+	*pkey = hfi2_16B_get_pkey(hdr);
+	*dlid = hfi2_16B_get_dlid(hdr);
+	*slid = hfi2_16B_get_slid(hdr);
+}
+
+#define LRH_PRN "len:%d sc:%d dlid:0x%.4x slid:0x%.4x "
+#define LRH_9B_PRN "lnh:%d,%s lver:%d sl:%d"
+#define LRH_16B_PRN "age:%d becn:%d fecn:%d l4:%d " \
+		    "rc:%d sc:%d pkey:0x%.4x entropy:0x%.4x"
+const char *hfi2_trace_fmt_lrh(struct trace_seq *p, bool bypass,
+			       u8 age, bool becn, bool fecn, u8 l4,
+			       u8 lnh, const char *lnh_name, u8 lver,
+			       u8 rc, u8 sc, u8 sl, u16 entropy,
+			       u16 len, u16 pkey, u32 dlid, u32 slid)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+
+	trace_seq_printf(p, LRH_PRN, len, sc, dlid, slid);
+
+	if (bypass)
+		trace_seq_printf(p, LRH_16B_PRN,
+				 age, becn, fecn, l4, rc, sc, pkey, entropy);
+
+	else
+		trace_seq_printf(p, LRH_9B_PRN,
+				 lnh, lnh_name, lver, sl);
+	trace_seq_putc(p, 0);
+
+	return ret;
+}
+
+#define BTH_9B_PRN \
+	"op:0x%.2x,%s se:%d m:%d pad:%d tver:%d pkey:0x%.4x " \
+	"f:%d b:%d qpn:0x%.6x a:%d psn:0x%.8x"
+#define BTH_16B_PRN \
+	"op:0x%.2x,%s se:%d m:%d pad:%d tver:%d " \
+	"qpn:0x%.6x a:%d psn:0x%.8x"
+#define L4_FM_16B_PRN \
+	"op:0x%.2x,%s dest_qpn:0x%.6x src_qpn:0x%.6x"
+const char *hfi2_trace_fmt_rest(struct trace_seq *p, bool bypass, u8 l4,
+				u8 ack, bool becn, bool fecn, u8 mig,
+				u8 se, u8 pad, u8 opcode, const char *opname,
+				u8 tver, u16 pkey, u32 psn, u32 qpn,
+				u32 dest_qpn, u32 src_qpn)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+
+	if (bypass)
+		if (l4 == OPA_16B_L4_FM)
+			trace_seq_printf(p, L4_FM_16B_PRN,
+					 opcode, opname, dest_qpn, src_qpn);
+		else
+			trace_seq_printf(p, BTH_16B_PRN,
+					 opcode, opname,
+					 se, mig, pad, tver, qpn, ack, psn);
+
+	else
+		trace_seq_printf(p, BTH_9B_PRN,
+				 opcode, opname,
+				 se, mig, pad, tver, pkey, fecn, becn,
+				 qpn, ack, psn);
+	trace_seq_putc(p, 0);
+
+	return ret;
+}
+
+const char *hfi2_parse_everbs_hdrs(
+	struct trace_seq *p,
+	u8 opcode, u8 l4, u32 dest_qpn, u32 src_qpn,
+	void *ehdrs)
+{
+	union ib_ehdrs *eh = ehdrs;
+	const char *ret = trace_seq_buffer_ptr(p);
+
+	if (l4 == OPA_16B_L4_FM) {
+		trace_seq_printf(p, "mgmt pkt");
+		goto out;
+	}
+
+	switch (opcode) {
+	/* imm */
+	case OP(RC, SEND_LAST_WITH_IMMEDIATE):
+	case OP(UC, SEND_LAST_WITH_IMMEDIATE):
+	case OP(RC, SEND_ONLY_WITH_IMMEDIATE):
+	case OP(UC, SEND_ONLY_WITH_IMMEDIATE):
+	case OP(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE):
+	case OP(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE):
+		trace_seq_printf(p, IMM_PRN,
+				 be32_to_cpu(eh->imm_data));
+		break;
+	/* reth + imm */
+	case OP(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE):
+	case OP(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE):
+		trace_seq_printf(p, RETH_PRN " " IMM_PRN,
+				 get_ib_reth_vaddr(&eh->rc.reth),
+				 be32_to_cpu(eh->rc.reth.rkey),
+				 be32_to_cpu(eh->rc.reth.length),
+				 be32_to_cpu(eh->rc.imm_data));
+		break;
+	/* reth */
+	case OP(RC, RDMA_READ_REQUEST):
+	case OP(RC, RDMA_WRITE_FIRST):
+	case OP(UC, RDMA_WRITE_FIRST):
+	case OP(RC, RDMA_WRITE_ONLY):
+	case OP(UC, RDMA_WRITE_ONLY):
+		trace_seq_printf(p, RETH_PRN,
+				 get_ib_reth_vaddr(&eh->rc.reth),
+				 be32_to_cpu(eh->rc.reth.rkey),
+				 be32_to_cpu(eh->rc.reth.length));
+		break;
+	case OP(RC, RDMA_READ_RESPONSE_FIRST):
+	case OP(RC, RDMA_READ_RESPONSE_LAST):
+	case OP(RC, RDMA_READ_RESPONSE_ONLY):
+	case OP(RC, ACKNOWLEDGE):
+		trace_seq_printf(p, AETH_PRN, be32_to_cpu(eh->aeth) >> 24,
+				 parse_syndrome(be32_to_cpu(eh->aeth) >> 24),
+				 be32_to_cpu(eh->aeth) & IB_MSN_MASK);
+		break;
+	case OP(TID_RDMA, WRITE_REQ):
+		trace_seq_printf(p, TID_RDMA_KDETH " " RETH_PRN " "
+				 TID_WRITE_REQ_PRN,
+				 le32_to_cpu(eh->tid_rdma.w_req.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.w_req.kdeth1),
+				 ib_u64_get(&eh->tid_rdma.w_req.reth.vaddr),
+				 be32_to_cpu(eh->tid_rdma.w_req.reth.rkey),
+				 be32_to_cpu(eh->tid_rdma.w_req.reth.length),
+				 be32_to_cpu(eh->tid_rdma.w_req.verbs_qp));
+		break;
+	case OP(TID_RDMA, WRITE_RESP):
+		trace_seq_printf(p, TID_RDMA_KDETH " " AETH_PRN " "
+				 TID_WRITE_RSP_PRN,
+				 le32_to_cpu(eh->tid_rdma.w_rsp.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.w_rsp.kdeth1),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.aeth) >> 24,
+				 parse_syndrome(/* aeth */
+					 be32_to_cpu(eh->tid_rdma.w_rsp.aeth)
+					 >> 24),
+				 (be32_to_cpu(eh->tid_rdma.w_rsp.aeth) &
+				  IB_MSN_MASK),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.tid_flow_psn),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.tid_flow_qp),
+				 be32_to_cpu(eh->tid_rdma.w_rsp.verbs_qp));
+		break;
+	case OP(TID_RDMA, WRITE_DATA_LAST):
+	case OP(TID_RDMA, WRITE_DATA):
+		trace_seq_printf(p, TID_RDMA_KDETH_DATA " " TID_WRITE_DATA_PRN,
+				 le32_to_cpu(eh->tid_rdma.w_data.kdeth0),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, KVER),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, SH),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, INTR),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, TIDCTRL),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, TID),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth0, OFFSET),
+				 le32_to_cpu(eh->tid_rdma.w_data.kdeth1),
+				 KDETH_GET(eh->tid_rdma.w_data.kdeth1, JKEY),
+				 be32_to_cpu(eh->tid_rdma.w_data.verbs_qp));
+		break;
+	case OP(TID_RDMA, READ_REQ):
+		trace_seq_printf(p, TID_RDMA_KDETH " " RETH_PRN " "
+				 TID_READ_REQ_PRN,
+				 le32_to_cpu(eh->tid_rdma.r_req.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.r_req.kdeth1),
+				 ib_u64_get(&eh->tid_rdma.r_req.reth.vaddr),
+				 be32_to_cpu(eh->tid_rdma.r_req.reth.rkey),
+				 be32_to_cpu(eh->tid_rdma.r_req.reth.length),
+				 be32_to_cpu(eh->tid_rdma.r_req.tid_flow_psn),
+				 be32_to_cpu(eh->tid_rdma.r_req.tid_flow_qp),
+				 be32_to_cpu(eh->tid_rdma.r_req.verbs_qp));
+		break;
+	case OP(TID_RDMA, READ_RESP):
+		trace_seq_printf(p, TID_RDMA_KDETH_DATA " " AETH_PRN " "
+				 TID_READ_RSP_PRN,
+				 le32_to_cpu(eh->tid_rdma.r_rsp.kdeth0),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, KVER),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, SH),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, INTR),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, TIDCTRL),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, TID),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth0, OFFSET),
+				 le32_to_cpu(eh->tid_rdma.r_rsp.kdeth1),
+				 KDETH_GET(eh->tid_rdma.r_rsp.kdeth1, JKEY),
+				 be32_to_cpu(eh->tid_rdma.r_rsp.aeth) >> 24,
+				 parse_syndrome(/* aeth */
+					 be32_to_cpu(eh->tid_rdma.r_rsp.aeth)
+					 >> 24),
+				 (be32_to_cpu(eh->tid_rdma.r_rsp.aeth) &
+				  IB_MSN_MASK),
+				 be32_to_cpu(eh->tid_rdma.r_rsp.verbs_qp));
+		break;
+	case OP(TID_RDMA, ACK):
+		trace_seq_printf(p, TID_RDMA_KDETH " " AETH_PRN " "
+				 TID_ACK_PRN,
+				 le32_to_cpu(eh->tid_rdma.ack.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.ack.kdeth1),
+				 be32_to_cpu(eh->tid_rdma.ack.aeth) >> 24,
+				 parse_syndrome(/* aeth */
+					 be32_to_cpu(eh->tid_rdma.ack.aeth)
+					 >> 24),
+				 (be32_to_cpu(eh->tid_rdma.ack.aeth) &
+				  IB_MSN_MASK),
+				 be32_to_cpu(eh->tid_rdma.ack.tid_flow_psn),
+				 be32_to_cpu(eh->tid_rdma.ack.verbs_psn),
+				 be32_to_cpu(eh->tid_rdma.ack.tid_flow_qp),
+				 be32_to_cpu(eh->tid_rdma.ack.verbs_qp));
+		break;
+	case OP(TID_RDMA, RESYNC):
+		trace_seq_printf(p, TID_RDMA_KDETH " " TID_RESYNC_PRN,
+				 le32_to_cpu(eh->tid_rdma.resync.kdeth0),
+				 le32_to_cpu(eh->tid_rdma.resync.kdeth1),
+				 be32_to_cpu(eh->tid_rdma.resync.verbs_qp));
+		break;
+	/* aeth + atomicacketh */
+	case OP(RC, ATOMIC_ACKNOWLEDGE):
+		trace_seq_printf(p, AETH_PRN " " ATOMICACKETH_PRN,
+				 be32_to_cpu(eh->at.aeth) >> 24,
+				 parse_syndrome(be32_to_cpu(eh->at.aeth) >> 24),
+				 be32_to_cpu(eh->at.aeth) & IB_MSN_MASK,
+				 ib_u64_get(&eh->at.atomic_ack_eth));
+		break;
+	/* atomiceth */
+	case OP(RC, COMPARE_SWAP):
+	case OP(RC, FETCH_ADD):
+		trace_seq_printf(p, ATOMICETH_PRN,
+				 get_ib_ateth_vaddr(&eh->atomic_eth),
+				 eh->atomic_eth.rkey,
+				 get_ib_ateth_swap(&eh->atomic_eth),
+				 get_ib_ateth_compare(&eh->atomic_eth));
+		break;
+	/* deth */
+	case OP(UD, SEND_ONLY):
+		trace_seq_printf(p, DETH_ENTROPY_PRN,
+				 be32_to_cpu(eh->ud.deth[0]),
+				 be32_to_cpu(eh->ud.deth[1]) & RVT_QPN_MASK,
+				 be32_to_cpu(eh->ud.deth[1]) >>
+					     HFI2_IPOIB_ENTROPY_SHIFT);
+		break;
+	case OP(UD, SEND_ONLY_WITH_IMMEDIATE):
+		trace_seq_printf(p, DETH_PRN,
+				 be32_to_cpu(eh->ud.deth[0]),
+				 be32_to_cpu(eh->ud.deth[1]) & RVT_QPN_MASK);
+		break;
+	/* ieth */
+	case OP(RC, SEND_LAST_WITH_INVALIDATE):
+	case OP(RC, SEND_ONLY_WITH_INVALIDATE):
+		trace_seq_printf(p, IETH_PRN,
+				 be32_to_cpu(eh->ieth));
+		break;
+	}
+out:
+	trace_seq_putc(p, 0);
+	return ret;
+}
+
+const char *hfi2_parse_sdma_flags(struct trace_seq *p, u64 *qw, u8 first, u8 last)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+	char flags[5] = { 'x', 'x', 'x', 'x', 0 };
+
+	flags[0] = (qw[1] & SDMA_DESC1_INT_REQ_FLAG) ? 'I' : '-';
+	flags[1] = (qw[1] & SDMA_DESC1_HEAD_TO_HOST_FLAG) ?  'H' : '-';
+	flags[2] = first ? 'F' : '-';
+	flags[3] = last ? 'L' : '-';
+	trace_seq_printf(p, "%s", flags);
+	if (first)
+		trace_seq_printf(p, " amode:%u aidx:%u alen:%u",
+				 (u8)((qw[1] >> SDMA_DESC1_HEADER_MODE_SHIFT) &
+				      SDMA_DESC1_HEADER_MODE_MASK),
+				 (u8)((qw[1] >> SDMA_DESC1_HEADER_INDEX_SHIFT) &
+				      SDMA_DESC1_HEADER_INDEX_MASK),
+				 (u8)((qw[1] >> SDMA_DESC1_HEADER_DWS_SHIFT) &
+				      SDMA_DESC1_HEADER_DWS_MASK));
+	return ret;
+}
+
+const char *hfi2_print_u32_array(
+	struct trace_seq *p,
+	u32 *arr, int len)
+{
+	int i;
+	const char *ret = trace_seq_buffer_ptr(p);
+
+	for (i = 0; i < len ; i++)
+		trace_seq_printf(p, "%s%#x", i == 0 ? "" : " ", arr[i]);
+	trace_seq_putc(p, 0);
+	return ret;
+}
+
+u8 hfi2_trace_get_tid_ctrl(u32 ent)
+{
+	return EXP_TID_GET(ent, CTRL);
+}
+
+u16 hfi2_trace_get_tid_len(u32 ent)
+{
+	return EXP_TID_GET(ent, LEN);
+}
+
+u16 hfi2_trace_get_tid_idx(u32 ent)
+{
+	return EXP_TID_GET(ent, IDX);
+}
+
+struct hfi2_ctxt_hist {
+	atomic_t count;
+	atomic_t data[255];
+};
+
+static struct hfi2_ctxt_hist hist = {
+	.count = ATOMIC_INIT(0)
+};
+
+const char *hfi2_trace_print_rsm_hist(struct trace_seq *p, unsigned int ctxt)
+{
+	int i, len = ARRAY_SIZE(hist.data);
+	const char *ret = trace_seq_buffer_ptr(p);
+	unsigned long packet_count = atomic_fetch_inc(&hist.count);
+
+	trace_seq_printf(p, "packet[%lu]", packet_count);
+	for (i = 0; i < len; ++i) {
+		unsigned long val;
+		atomic_t *count = &hist.data[i];
+
+		if (ctxt == i)
+			val = atomic_fetch_inc(count);
+		else
+			val = atomic_read(count);
+
+		if (val)
+			trace_seq_printf(p, "(%d:%lu)", i, val);
+	}
+	trace_seq_putc(p, 0);
+	return ret;
+}
+
+const char *hfi2_memtype_str(unsigned int mt)
+{
+	switch (mt) {
+	case HFI2_MEMINFO_TYPE_SYSTEM:
+		return "System";
+	}
+
+	return "<unknown>";
+}
+
+__hfi2_trace_fn(AFFINITY);
+__hfi2_trace_fn(PKT);
+__hfi2_trace_fn(PROC);
+__hfi2_trace_fn(SDMA);
+__hfi2_trace_fn(LINKVERB);
+__hfi2_trace_fn(DEBUG);
+__hfi2_trace_fn(SNOOP);
+__hfi2_trace_fn(CNTR);
+__hfi2_trace_fn(PIO);
+__hfi2_trace_fn(DC8051);
+__hfi2_trace_fn(FIRMWARE);
+__hfi2_trace_fn(RCVCTRL);
+__hfi2_trace_fn(TID);
+__hfi2_trace_fn(MMU);
+__hfi2_trace_fn(IOCTL);