libhsakmt: add open SMI event handle

System Management Interface event is read from anonymous file handle,
this helper wrap the ioctl interface to get anonymous file handle for
GPU nodeid.

Define SMI event IDs, event triggers, copy the same value from
kfd_ioctl.h to avoid translation.

Change-Id: I5c8ba5301473bb3b80bb4e2aa33a9f675bedb001
Signed-off-by: Philip Yang <Philip.Yang@amd.com>

src/events.c

@@ -339,3 +339,30 @@ out:
 
 	return result;
 }
+
+HSAKMT_STATUS HSAKMTAPI hsaKmtOpenSMI(HSAuint32 NodeId, int *fd)
+{
+	struct kfd_ioctl_smi_events_args args;
+	HSAKMT_STATUS result;
+	uint32_t gpuid;
+
+	CHECK_KFD_OPEN();
+
+	pr_debug("[%s] node %d\n", __func__, NodeId);
+
+	result = validate_nodeid(NodeId, &gpuid);
+	if (result != HSAKMT_STATUS_SUCCESS) {
+		pr_err("[%s] invalid node ID: %d\n", __func__, NodeId);
+		return result;
+	}
+
+	args.gpuid = gpuid;
+	result = kmtIoctl(kfd_fd, AMDKFD_IOC_SMI_EVENTS, &args);
+	if (result) {
+		pr_debug("open SMI event fd failed %s\n", strerror(errno));
+		return HSAKMT_STATUS_ERROR;
+	}
+
+	*fd = args.anon_fd;
+	return HSAKMT_STATUS_SUCCESS;
+}

src/libhsakmt.ver

@@ -69,6 +69,7 @@ hsaKmtSVMSetAttr;
 hsaKmtSVMGetAttr;
 hsaKmtSetXNACKMode;
 hsaKmtGetXNACKMode;
+hsaKmtOpenSMI;
 
 local: *;
 };