IB/MAD: Add SMP details to MAD tracing

Decode more information from the packet and include it in the trace.

Reviewed-by: "Ruhl, Michael J" <[e-mail]>
Signed-off-by: Ira Weiny <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

drivers/infiniband/core/mad.c

···
 	if (opa && smp->class_version == OPA_SM_CLASS_VERSION) {
 		u32 opa_drslid;
 
+		trace_ib_mad_handle_out_opa_smi(opa_smp);
+
 		if ((opa_get_smp_direction(opa_smp)
 		     ? opa_smp->route.dr.dr_dlid : opa_smp->route.dr.dr_slid) ==
 		     OPA_LID_PERMISSIVE &&
···
 		    opa_smi_check_local_returning_smp(opa_smp, device) == IB_SMI_DISCARD)
 			goto out;
 	} else {
+		trace_ib_mad_handle_out_ib_smi(smp);
+
 		if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) ==
 		     IB_LID_PERMISSIVE &&
 		     smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) ==
···
 	enum smi_forward_action retsmi;
 	struct ib_smp *smp = (struct ib_smp *)recv->mad;
 
+	trace_ib_mad_handle_ib_smi(smp);
+
 	if (smi_handle_dr_smp_recv(smp,
 				   rdma_cap_ib_switch(port_priv->device),
 				   port_num,
···
 {
 	enum smi_forward_action retsmi;
 	struct opa_smp *smp = (struct opa_smp *)recv->mad;
+
+	trace_ib_mad_handle_opa_smi(smp);
 
 	if (opa_smi_handle_dr_smp_recv(smp,
 				   rdma_cap_ib_switch(port_priv->device),

include/trace/events/ib_mad.h

···
 	TP_ARGS(agent));
 
 
+
+DECLARE_EVENT_CLASS(ib_mad_opa_smi_template,
+	TP_PROTO(struct opa_smp *smp),
+	TP_ARGS(smp),
+
+	TP_STRUCT__entry(
+		__field(u64,            mkey)
+		__field(u32,            dr_slid)
+		__field(u32,            dr_dlid)
+		__field(u8,             hop_ptr)
+		__field(u8,             hop_cnt)
+		__array(u8,             initial_path, OPA_SMP_MAX_PATH_HOPS)
+		__array(u8,             return_path, OPA_SMP_MAX_PATH_HOPS)
+	),
+
+	TP_fast_assign(
+		__entry->hop_ptr = smp->hop_ptr;
+		__entry->hop_cnt = smp->hop_cnt;
+		__entry->mkey = smp->mkey;
+		__entry->dr_slid = smp->route.dr.dr_slid;
+		__entry->dr_dlid = smp->route.dr.dr_dlid;
+		memcpy(__entry->initial_path, smp->route.dr.initial_path,
+			OPA_SMP_MAX_PATH_HOPS);
+		memcpy(__entry->return_path, smp->route.dr.return_path,
+			OPA_SMP_MAX_PATH_HOPS);
+	),
+
+	TP_printk("OPA SMP: hop_ptr %d hop_cnt %d " \
+		  "mkey 0x%016llx dr_slid 0x%08x dr_dlid 0x%08x " \
+		  "initial_path %*ph return_path %*ph ",
+		__entry->hop_ptr, __entry->hop_cnt,
+		be64_to_cpu(__entry->mkey), be32_to_cpu(__entry->dr_slid),
+		be32_to_cpu(__entry->dr_dlid),
+		OPA_SMP_MAX_PATH_HOPS, __entry->initial_path,
+		OPA_SMP_MAX_PATH_HOPS, __entry->return_path
+	)
+);
+
+DEFINE_EVENT(ib_mad_opa_smi_template, ib_mad_handle_opa_smi,
+	TP_PROTO(struct opa_smp *smp),
+	TP_ARGS(smp));
+DEFINE_EVENT(ib_mad_opa_smi_template, ib_mad_handle_out_opa_smi,
+	TP_PROTO(struct opa_smp *smp),
+	TP_ARGS(smp));
+
+
+DECLARE_EVENT_CLASS(ib_mad_opa_ib_template,
+	TP_PROTO(struct ib_smp *smp),
+	TP_ARGS(smp),
+
+	TP_STRUCT__entry(
+		__field(u64,            mkey)
+		__field(u32,            dr_slid)
+		__field(u32,            dr_dlid)
+		__field(u8,             hop_ptr)
+		__field(u8,             hop_cnt)
+		__array(u8,             initial_path, IB_SMP_MAX_PATH_HOPS)
+		__array(u8,             return_path, IB_SMP_MAX_PATH_HOPS)
+	),
+
+	TP_fast_assign(
+		__entry->hop_ptr = smp->hop_ptr;
+		__entry->hop_cnt = smp->hop_cnt;
+		__entry->mkey = smp->mkey;
+		__entry->dr_slid = smp->dr_slid;
+		__entry->dr_dlid = smp->dr_dlid;
+		memcpy(__entry->initial_path, smp->initial_path,
+			IB_SMP_MAX_PATH_HOPS);
+		memcpy(__entry->return_path, smp->return_path,
+			IB_SMP_MAX_PATH_HOPS);
+	),
+
+	TP_printk("OPA SMP: hop_ptr %d hop_cnt %d " \
+		  "mkey 0x%016llx dr_slid 0x%04x dr_dlid 0x%04x " \
+		  "initial_path %*ph return_path %*ph ",
+		__entry->hop_ptr, __entry->hop_cnt,
+		be64_to_cpu(__entry->mkey), be16_to_cpu(__entry->dr_slid),
+		be16_to_cpu(__entry->dr_dlid),
+		IB_SMP_MAX_PATH_HOPS, __entry->initial_path,
+		IB_SMP_MAX_PATH_HOPS, __entry->return_path
+	)
+);
+
+DEFINE_EVENT(ib_mad_opa_ib_template, ib_mad_handle_ib_smi,
+	TP_PROTO(struct ib_smp *smp),
+	TP_ARGS(smp));
+DEFINE_EVENT(ib_mad_opa_ib_template, ib_mad_handle_out_ib_smi,
+	TP_PROTO(struct ib_smp *smp),
+	TP_ARGS(smp));
+
 #endif /* _TRACE_IB_MAD_H */
 
 #include <trace/define_trace.h>