hw/cxl/events: Wire up get/clear event mailbox commands

CXL testing is benefited from an artificial event log injection
mechanism.

Add an event log infrastructure to insert, get, and clear events from
the various logs available on a device.

Replace the stubbed out CXL Get/Clear Event mailbox commands with
commands that operate on the new infrastructure.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20230530133603.16934-4-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/include/hw/cxl/cxl_events.h b/include/hw/cxl/cxl_events.h
index aeb3b0590e..d4aaa894f1 100644
--- a/include/hw/cxl/cxl_events.h
+++ b/include/hw/cxl/cxl_events.h
@@ -10,6 +10,8 @@
 #ifndef CXL_EVENTS_H
 #define CXL_EVENTS_H
 
+#include "qemu/uuid.h"
+
 /*
  * CXL rev 3.0 section 8.2.9.2.2; Table 8-49
  *
@@ -25,4 +27,57 @@ typedef enum CXLEventLogType {
     CXL_EVENT_TYPE_MAX
 } CXLEventLogType;
 
+/*
+ * Common Event Record Format
+ * CXL rev 3.0 section 8.2.9.2.1; Table 8-42
+ */
+#define CXL_EVENT_REC_HDR_RES_LEN 0xf
+typedef struct CXLEventRecordHdr {
+    QemuUUID id;
+    uint8_t length;
+    uint8_t flags[3];
+    uint16_t handle;
+    uint16_t related_handle;
+    uint64_t timestamp;
+    uint8_t maint_op_class;
+    uint8_t reserved[CXL_EVENT_REC_HDR_RES_LEN];
+} QEMU_PACKED CXLEventRecordHdr;
+
+#define CXL_EVENT_RECORD_DATA_LENGTH 0x50
+typedef struct CXLEventRecordRaw {
+    CXLEventRecordHdr hdr;
+    uint8_t data[CXL_EVENT_RECORD_DATA_LENGTH];
+} QEMU_PACKED CXLEventRecordRaw;
+#define CXL_EVENT_RECORD_SIZE (sizeof(CXLEventRecordRaw))
+
+/*
+ * Get Event Records output payload
+ * CXL rev 3.0 section 8.2.9.2.2; Table 8-50
+ */
+#define CXL_GET_EVENT_FLAG_OVERFLOW     BIT(0)
+#define CXL_GET_EVENT_FLAG_MORE_RECORDS BIT(1)
+typedef struct CXLGetEventPayload {
+    uint8_t flags;
+    uint8_t reserved1;
+    uint16_t overflow_err_count;
+    uint64_t first_overflow_timestamp;
+    uint64_t last_overflow_timestamp;
+    uint16_t record_count;
+    uint8_t reserved2[0xa];
+    CXLEventRecordRaw records[];
+} QEMU_PACKED CXLGetEventPayload;
+#define CXL_EVENT_PAYLOAD_HDR_SIZE (sizeof(CXLGetEventPayload))
+
+/*
+ * Clear Event Records input payload
+ * CXL rev 3.0 section 8.2.9.2.3; Table 8-51
+ */
+typedef struct CXLClearEventPayload {
+    uint8_t event_log;      /* CXLEventLogType */
+    uint8_t clear_flags;
+    uint8_t nr_recs;
+    uint8_t reserved[3];
+    uint16_t handle[];
+} CXLClearEventPayload;
+
 #endif /* CXL_EVENTS_H */