Messages in this thread Patch in this message | | | From | alison.schofield@intel ... | Subject | [PATCH v7 2/6] cxl/trace: Add TRACE support for CXL media-error records | Date | Fri, 17 Feb 2023 18:18:50 -0800 |
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From: Alison Schofield <alison.schofield@intel.com>
CXL devices may support the retrieval of a device poison list. Add a new trace event that the CXL subsystem may use to log the media-error records returned in the poison list.
Log each media-error record as a trace event of type 'cxl_poison'.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Alison Schofield <alison.schofield@intel.com> --- drivers/cxl/core/mbox.c | 4 +- drivers/cxl/core/trace.h | 84 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 87 insertions(+), 1 deletion(-)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index faa61e5f541f..a3da8b4e92a4 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1147,7 +1147,9 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, if (rc) break; - /* TODO TRACE the media error records */ + for (int i = 0; i < le16_to_cpu(po->count); i++) + trace_cxl_poison(cxlmd, cxlr, &po->record[i], + po->flags, po->overflow_t); /* Protect against an uncleared _FLAG_MORE */ nr_records = nr_records + le16_to_cpu(po->count); diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h index c72ef9321cfe..289fab1a686d 100644 --- a/drivers/cxl/core/trace.h +++ b/drivers/cxl/core/trace.h @@ -7,6 +7,7 @@ #define _CXL_EVENTS_H #include <linux/tracepoint.h> +#include <linux/pci.h> #include <asm-generic/unaligned.h> #include <cxl.h> @@ -581,6 +582,89 @@ TRACE_EVENT(cxl_memory_module, ) ); +#define __show_poison_source(source) \ + __print_symbolic(source, \ + { CXL_POISON_SOURCE_UNKNOWN, "Unknown" }, \ + { CXL_POISON_SOURCE_EXTERNAL, "External" }, \ + { CXL_POISON_SOURCE_INTERNAL, "Internal" }, \ + { CXL_POISON_SOURCE_INJECTED, "Injected" }, \ + { CXL_POISON_SOURCE_VENDOR, "Vendor" }) + +#define show_poison_source(source) \ + (((source > CXL_POISON_SOURCE_INJECTED) && \ + (source != CXL_POISON_SOURCE_VENDOR)) ? "Reserved" \ + : __show_poison_source(source)) + +#define show_poison_flags(flags) \ + __print_flags(flags, "|", \ + { CXL_POISON_FLAG_MORE, "More" }, \ + { CXL_POISON_FLAG_OVERFLOW, "Overflow" }, \ + { CXL_POISON_FLAG_SCANNING, "Scanning" }) + +#define __cxl_poison_addr(record) \ + (le64_to_cpu(record->address)) +#define cxl_poison_record_dpa(record) \ + (__cxl_poison_addr(record) & CXL_POISON_START_MASK) +#define cxl_poison_record_source(record) \ + (__cxl_poison_addr(record) & CXL_POISON_SOURCE_MASK) +#define cxl_poison_record_length(record) \ + (le32_to_cpu(record->length) * CXL_POISON_LEN_MULT) +#define cxl_poison_overflow(flags, time) \ + (flags & CXL_POISON_FLAG_OVERFLOW ? le64_to_cpu(time) : 0) + +TRACE_EVENT(cxl_poison, + + TP_PROTO(struct cxl_memdev *cxlmd, struct cxl_region *region, + const struct cxl_poison_record *record, + u8 flags, __le64 overflow_t), + + TP_ARGS(cxlmd, region, record, flags, overflow_t), + + TP_STRUCT__entry( + __string(memdev, dev_name(&cxlmd->dev)) + __string(host, dev_name(cxlmd->dev.parent)) + __field(u64, serial) + __string(region, region) + __field(u64, overflow_t) + __field(u64, dpa) + __field(u32, length) + __array(char, uuid, 16) + __field(u8, source) + __field(u8, flags) + ), + + TP_fast_assign( + __assign_str(memdev, dev_name(&cxlmd->dev)); + __assign_str(host, dev_name(cxlmd->dev.parent)); + __entry->serial = cxlmd->cxlds->serial; + __entry->overflow_t = cxl_poison_overflow(flags, overflow_t); + __entry->dpa = cxl_poison_record_dpa(record); + __entry->length = cxl_poison_record_length(record); + __entry->source = cxl_poison_record_source(record); + __entry->flags = flags; + if (region) { + __assign_str(region, dev_name(®ion->dev)); + memcpy(__entry->uuid, ®ion->params.uuid, 16); + } else { + __assign_str(region, ""); + memset(__entry->uuid, 0, 16); + } + ), + + TP_printk("memdev=%s host=%s serial=%lld region=%s region_uuid=%pU dpa=0x%llx length=0x%x source=%s flags=%s overflow_time=%llu", + __get_str(memdev), + __get_str(host), + __entry->serial, + __get_str(region), + __entry->uuid, + __entry->dpa, + __entry->length, + show_poison_source(__entry->source), + show_poison_flags(__entry->flags), + __entry->overflow_t + ) +); + #endif /* _CXL_EVENTS_H */ #define TRACE_INCLUDE_FILE trace -- 2.37.3
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