On 8/16/24 7:44 AM, ira.weiny@xxxxxxxxx wrote: > From: Navneet Singh <navneet.singh@xxxxxxxxx> > > 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. > > Signed-off-by: Navneet Singh <navneet.singh@xxxxxxxxx> > Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx> Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx> small nit below > > --- > Changes: > [Alison: Update commit message] > --- > drivers/cxl/core/mbox.c | 4 +++ > drivers/cxl/core/trace.h | 65 ++++++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 69 insertions(+) > > diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c > index d43ac8eabf56..8202fc6c111d 100644 > --- a/drivers/cxl/core/mbox.c > +++ b/drivers/cxl/core/mbox.c > @@ -977,6 +977,10 @@ static void __cxl_event_trace_record(const struct cxl_memdev *cxlmd, > ev_type = CXL_CPER_EVENT_DRAM; > else if (uuid_equal(uuid, &CXL_EVENT_MEM_MODULE_UUID)) > ev_type = CXL_CPER_EVENT_MEM_MODULE; > + else if (uuid_equal(uuid, &CXL_EVENT_DC_EVENT_UUID)) { > + 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 9167cfba7f59..a3a5269311ee 100644 > --- a/drivers/cxl/core/trace.h > +++ b/drivers/cxl/core/trace.h > @@ -731,6 +731,71 @@ TRACE_EVENT(cxl_poison, > ) > ); > > +/* > + * DYNAMIC CAPACITY Event Record - DER > + * > + * CXL rev 3.0 section 8.2.9.2.1.5 Table 8-47 Should we just use 3.1 since it's the latest? > + */ > + > +#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, region_id) > + __field(u64, dpa_start) > + __field(u64, length) > + __array(u8, tag, CXL_EXTENT_TAG_LEN) > + __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->region_id = rec->region_index; > + __entry->dpa_start = le64_to_cpu(rec->extent.start_dpa); > + __entry->length = le64_to_cpu(rec->extent.length); > + memcpy(__entry->tag, &rec->extent.tag, CXL_EXTENT_TAG_LEN); > + __entry->sh_extent_seq = le16_to_cpu(rec->extent.shared_extn_seq); > + ), > + > + CXL_EVT_TP_printk("event_type='%s' host_id='%d' region_id='%d' " \ > + "starting_dpa=%llx length=%llx tag=%s " \ > + "shared_extent_sequence=%d", > + show_dc_evt_type(__entry->event_type), > + __entry->hostid, > + __entry->region_id, > + __entry->dpa_start, > + __entry->length, > + __print_hex(__entry->tag, CXL_EXTENT_TAG_LEN), > + __entry->sh_extent_seq > + ) > +); > + > #endif /* _CXL_EVENTS_H */ > > #define TRACE_INCLUDE_FILE trace >