+static int
+qdio_get_ssqd_information(struct subchannel_id *schid,
+ struct qdio_chsc_ssqd **ssqd_area)
+{
+ int result;
+
+ QDIO_DBF_TEXT0(0, setup, "getssqd");
+ *ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
+ if (!ssqd_area) {
+ QDIO_PRINT_WARN("Could not get memory for chsc on sch x%x.\n",
+ schid->sch_no);
+ return -ENOMEM;
+ }
+
+ (*ssqd_area)->request = (struct chsc_header) {
+ .length = 0x0010,
+ .code = 0x0024,
+ };
+ (*ssqd_area)->first_sch = schid->sch_no;
+ (*ssqd_area)->last_sch = schid->sch_no;
+ (*ssqd_area)->ssid = schid->ssid;
+ result = chsc(*ssqd_area);
+
+ if (result) {
+ QDIO_PRINT_WARN("CHSC returned cc %i on sch 0.%x.%x.\n",
+ result, schid->ssid, schid->sch_no);
+ goto out;
+ }
+
+ if ((*ssqd_area)->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
+ QDIO_PRINT_WARN("CHSC response is 0x%x on sch 0.%x.%x.\n",
+ (*ssqd_area)->response.code,
+ schid->ssid, schid->sch_no);
+ goto out;
+ }
+ if (!((*ssqd_area)->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
+ !((*ssqd_area)->flags & CHSC_FLAG_VALIDITY) ||
+ ((*ssqd_area)->sch != schid->sch_no)) {
+ QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
+ "using all SIGAs.\n",
+ schid->ssid, schid->sch_no);
+ goto out;
+ }
+ return 0;
+out:
+ return -EINVAL;
+}
+
+int
+qdio_get_ssqd_pct(struct ccw_device *cdev)
+{
+ struct qdio_chsc_ssqd *ssqd_area;
+ struct subchannel_id schid;
+ char dbf_text[15];
+ int rc;
+ int pct = 0;
+
+ QDIO_DBF_TEXT0(0, setup, "getpct");
+ schid = ccw_device_get_subchannel_id(cdev);
+ rc = qdio_get_ssqd_information(&schid, &ssqd_area);
+ if (!rc)
+ pct = (int)ssqd_area->pct;
+ if (rc != -ENOMEM)
+ mempool_free(ssqd_area, qdio_mempool_scssc);
+ sprintf(dbf_text, "pct: %d", pct);
+ QDIO_DBF_TEXT2(0, setup, dbf_text);
+ return pct;
+}
+EXPORT_SYMBOL(qdio_get_ssqd_pct);
+