On 5/23/26 2:43 AM, Anisa Su wrote: > From: Ira Weiny <[email protected]> > > CXL rev 3.1 section 8.2.9.2.1 adds the Dynamic Capacity Event Records. > User space can use trace events for debugging of DC capacity changes. > > Add DC trace points to the trace log. > > Based on an original patch by Navneet Singh. > > Reviewed-by: Jonathan Cameron <[email protected]> > Reviewed-by: Dave Jiang <[email protected]> > Reviewed-by: Fan Ni <[email protected]> > Signed-off-by: Ira Weiny <[email protected]> > --- > drivers/cxl/core/mbox.c | 5 ++++ > drivers/cxl/core/trace.h | 65 ++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 70 insertions(+) > > diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c > index 486110e1c03d..271f4556db85 100644 > --- a/drivers/cxl/core/mbox.c > +++ b/drivers/cxl/core/mbox.c > @@ -1030,6 +1030,11 @@ static void __cxl_event_trace_record(struct cxl_memdev > *cxlmd, > ev_type = CXL_CPER_EVENT_MEM_MODULE; > else if (uuid_equal(uuid, &CXL_EVENT_MEM_SPARING_UUID)) > ev_type = CXL_CPER_EVENT_MEM_SPARING; > + else if (uuid_equal(uuid, &CXL_EVENT_DC_EVENT_UUID)) { > +/* FIXME still valid? */ ? address or delete? > + trace_cxl_dynamic_capacity(cxlmd, type, &record->event.dcd); > + return; > + } > > cxl_event_trace_record(cxlmd, type, ev_type, uuid, &record->event); > } > diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h > index a972e4ef1936..421e492d1b3f 100644 > --- a/drivers/cxl/core/trace.h > +++ b/drivers/cxl/core/trace.h > @@ -1099,6 +1099,71 @@ TRACE_EVENT(cxl_poison, > ) > ); > > +/* > + * Dynamic Capacity Event Record - DER > + * > + * CXL rev 3.1 section 8.2.9.2.1.6 Table 8-50 Let's move it to 4.0 > + */ > + > +#define CXL_DC_ADD_CAPACITY 0x00 > +#define CXL_DC_REL_CAPACITY 0x01 > +#define CXL_DC_FORCED_REL_CAPACITY 0x02 > +#define CXL_DC_REG_CONF_UPDATED 0x03 > +#define show_dc_evt_type(type) __print_symbolic(type, \ > + { CXL_DC_ADD_CAPACITY, "Add capacity"}, \ > + { CXL_DC_REL_CAPACITY, "Release capacity"}, \ > + { CXL_DC_FORCED_REL_CAPACITY, "Forced capacity release"}, \ > + { CXL_DC_REG_CONF_UPDATED, "Region Configuration Updated" } \ > +) > + > +TRACE_EVENT(cxl_dynamic_capacity, > + > + TP_PROTO(const struct cxl_memdev *cxlmd, enum cxl_event_log_type log, > + struct cxl_event_dcd *rec), > + > + TP_ARGS(cxlmd, log, rec), > + > + TP_STRUCT__entry( > + CXL_EVT_TP_entry > + > + /* Dynamic capacity Event */ > + __field(u8, event_type) > + __field(u16, hostid) > + __field(u8, partition_id) > + __field(u64, dpa_start) > + __field(u64, length) > + __array(u8, uuid, UUID_SIZE) > + __field(u16, sh_extent_seq) > + ), > + > + TP_fast_assign( > + CXL_EVT_TP_fast_assign(cxlmd, log, rec->hdr); > + > + /* Dynamic_capacity Event */ > + __entry->event_type = rec->event_type; > + > + /* DCD event record data */ > + __entry->hostid = le16_to_cpu(rec->host_id); > + __entry->partition_id = rec->partition_index; CXL r4.0 8.2.10.2.1.6 Table 8-229 Couple issues. 1. This is not partition_index, it's updated_region_index. 2. It's only valid for events of type Region Configuration Updated. Otherwise we may be displaying garbage or 0. So it needs a rename and also a check for validity. Better to fix it before rasdaemon start picking it up. DJ > + __entry->dpa_start = le64_to_cpu(rec->extent.start_dpa); > + __entry->length = le64_to_cpu(rec->extent.length); > + memcpy(__entry->uuid, &rec->extent.uuid, UUID_SIZE); > + __entry->sh_extent_seq = > le16_to_cpu(rec->extent.shared_extn_seq); > + ), > + > + CXL_EVT_TP_printk("event_type='%s' host_id='%d' partition_id='%d' " \ > + "starting_dpa=%llx length=%llx tag=%pU " \ > + "shared_extent_sequence=%d", > + show_dc_evt_type(__entry->event_type), > + __entry->hostid, > + __entry->partition_id, > + __entry->dpa_start, > + __entry->length, > + __entry->uuid, > + __entry->sh_extent_seq > + ) > +); > + > #endif /* _CXL_EVENTS_H */ > > #define TRACE_INCLUDE_FILE trace
