s390/ap: add error response code field for ap queue devices

On AP instruction failures the last response code is now
kept in the struct ap_queue. There is also a new sysfs
attribute showing this field (enabled only on debug kernels).

Also slight rework of the AP_DBF macros to get some more
content into one debug feature message line.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

drivers/s390/crypto/ap_bus.c

@@ -214,7 +214,7 @@ static inline int ap_fetch_qci_info(struct ap_config_info *info)
 static void __init ap_init_qci_info(void)
 {
 	if (!ap_qci_available()) {
-		AP_DBF(DBF_INFO, "%s QCI not supported\n", __func__);
+		AP_DBF_INFO("%s QCI not supported\n", __func__);
 		return;
 	}
 
@@ -226,18 +226,18 @@ static void __init ap_init_qci_info(void)
 		ap_qci_info = NULL;
 		return;
 	}
-	AP_DBF(DBF_INFO, "%s successful fetched initial qci info\n", __func__);
+	AP_DBF_INFO("%s successful fetched initial qci info\n", __func__);
 
 	if (ap_qci_info->apxa) {
 		if (ap_qci_info->Na) {
 			ap_max_adapter_id = ap_qci_info->Na;
-			AP_DBF(DBF_INFO, "%s new ap_max_adapter_id is %d\n",
-			       __func__, ap_max_adapter_id);
+			AP_DBF_INFO("%s new ap_max_adapter_id is %d\n",
+				    __func__, ap_max_adapter_id);
 		}
 		if (ap_qci_info->Nd) {
 			ap_max_domain_id = ap_qci_info->Nd;
-			AP_DBF(DBF_INFO, "%s new ap_max_domain_id is %d\n",
-			       __func__, ap_max_domain_id);
+			AP_DBF_INFO("%s new ap_max_domain_id is %d\n",
+				    __func__, ap_max_domain_id);
 		}
 	}
 }
@@ -618,8 +618,8 @@ static int __ap_revise_reserved(struct device *dev, void *dummy)
 		drvres = to_ap_drv(dev->driver)->flags
 			& AP_DRIVER_FLAG_DEFAULT;
 		if (!!devres != !!drvres) {
-			AP_DBF(DBF_DEBUG, "reprobing queue=%02x.%04x\n",
-			       card, queue);
+			AP_DBF_DBG("reprobing queue=%02x.%04x\n",
+				   card, queue);
 			rc = device_reprobe(dev);
 		}
 	}
@@ -796,7 +796,7 @@ EXPORT_SYMBOL(ap_bus_force_rescan);
 */
 void ap_bus_cfg_chg(void)
 {
-	AP_DBF(DBF_INFO, "%s config change, forcing bus rescan\n", __func__);
+	AP_DBF_DBG("%s config change, forcing bus rescan\n", __func__);
 
 	ap_bus_force_rescan();
 }
@@ -947,7 +947,7 @@ static ssize_t ap_domain_store(struct bus_type *bus,
 	ap_domain_index = domain;
 	spin_unlock_bh(&ap_domain_lock);
 
-	AP_DBF(DBF_INFO, "stored new default domain=%d\n", domain);
+	AP_DBF_INFO("stored new default domain=%d\n", domain);
 
 	return count;
 }
@@ -1208,8 +1208,8 @@ static void ap_select_domain(void)
 	}
 	if (dom <= ap_max_domain_id) {
 		ap_domain_index = dom;
-		AP_DBF(DBF_DEBUG, "%s new default domain is %d\n",
-		       __func__, ap_domain_index);
+		AP_DBF_INFO("%s new default domain is %d\n",
+			    __func__, ap_domain_index);
 	}
 out:
 	spin_unlock_bh(&ap_domain_lock);
@@ -1225,8 +1225,11 @@ static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func)
 	int comp_type = 0;
 
 	/* < CEX2A is not supported */
-	if (rawtype < AP_DEVICE_TYPE_CEX2A)
+	if (rawtype < AP_DEVICE_TYPE_CEX2A) {
+		AP_DBF_WARN("get_comp_type queue=%02x.%04x unsupported type %d\n",
+			    AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype);
 		return 0;
+	}
 	/* up to CEX7 known and fully supported */
 	if (rawtype <= AP_DEVICE_TYPE_CEX7)
 		return rawtype;
@@ -1248,11 +1251,12 @@ static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func)
 			comp_type = apinfo.cat;
 	}
 	if (!comp_type)
-		AP_DBF(DBF_WARN, "queue=%02x.%04x unable to map type %d\n",
-		       AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype);
+		AP_DBF_WARN("get_comp_type queue=%02x.%04x unable to map type %d\n",
+			    AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype);
 	else if (comp_type != rawtype)
-		AP_DBF(DBF_INFO, "queue=%02x.%04x map type %d to %d\n",
-		       AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype, comp_type);
+		AP_DBF_INFO("get_comp_type queue=%02x.%04x map type %d to %d\n",
+			    AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			    rawtype, comp_type);
 	return comp_type;
 }
 
@@ -1333,11 +1337,11 @@ static void _ap_scan_bus_adapter(int id)
 			broken = true;
 		} else if (ac->raw_hwtype != type) {
 			/* card type has changed */
-			AP_DBF(DBF_INFO, "card=%02x type changed.\n", id);
+			AP_DBF_INFO("card=%02x type changed.\n", id);
 			broken = true;
 		} else if (ac->functions != func) {
 			/* card functions have changed */
-			AP_DBF(DBF_INFO, "card=%02x functions changed.\n", id);
+			AP_DBF_INFO("card=%02x functions changed.\n", id);
 			broken = true;
 		}
 		if (broken) {
@@ -1385,9 +1389,8 @@ static void _ap_scan_bus_adapter(int id)
 			}
 			if (broken) {
 				/* Remove broken device */
-				AP_DBF(DBF_DEBUG,
-				       "removing broken queue=%02x.%04x\n",
-				       id, dom);
+				AP_DBF_DBG("removing broken queue=%02x.%04x\n",
+					   id, dom);
 				device_unregister(dev);
 			}
 			put_device(dev);
@@ -1448,7 +1451,7 @@ static void ap_scan_bus(struct work_struct *unused)
 	ap_fetch_qci_info(ap_qci_info);
 	ap_select_domain();
 
-	AP_DBF(DBF_DEBUG, "%s running\n", __func__);
+	AP_DBF_DBG("%s running\n", __func__);
 
 	/* loop over all possible adapters */
 	for (id = 0; id < AP_DEVICES; id++)
@@ -1463,9 +1466,8 @@ static void ap_scan_bus(struct work_struct *unused)
 		if (dev)
 			put_device(dev);
 		else
-			AP_DBF(DBF_INFO,
-			       "no queue device with default domain %d available\n",
-			       ap_domain_index);
+			AP_DBF_INFO("no queue device with default domain %d available\n",
+				    ap_domain_index);
 	}
 
 	mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);

drivers/s390/crypto/ap_bus.h

@@ -190,6 +190,7 @@ struct ap_queue {
 	struct list_head requestq;	/* List of message yet to be sent. */
 	struct ap_message *reply;	/* Per device reply message. */
 	enum ap_sm_state sm_state;	/* ap queue state machine state */
+	int last_err_rc;		/* last error state response code */
 };
 
 #define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)

drivers/s390/crypto/ap_debug.h

@@ -20,6 +20,14 @@
 
 #define AP_DBF(...)					\
 	debug_sprintf_event(ap_dbf_info, ##__VA_ARGS__)
+#define AP_DBF_ERR(...)					\
+	debug_sprintf_event(ap_dbf_info, DBF_ERR, ##__VA_ARGS__)
+#define AP_DBF_WARN(...)					\
+	debug_sprintf_event(ap_dbf_info, DBF_WARN, ##__VA_ARGS__)
+#define AP_DBF_INFO(...)					\
+	debug_sprintf_event(ap_dbf_info, DBF_INFO, ##__VA_ARGS__)
+#define AP_DBF_DBG(...)					\
+	debug_sprintf_event(ap_dbf_info, DBF_DEBUG, ##__VA_ARGS__)
 
 extern debug_info_t *ap_dbf_info;
 

drivers/s390/crypto/ap_queue.c

@@ -196,6 +196,10 @@ static enum ap_sm_wait ap_sm_read(struct ap_queue *aq)
 		return AP_SM_WAIT_NONE;
 	default:
 		aq->dev_state = AP_DEV_STATE_ERROR;
+		aq->last_err_rc = status.response_code;
+		AP_DBF_WARN("%s RC 0x%02hhx on 0x%02x.%04x -> AP_DEV_STATE_ERROR\n",
+			    __func__, status.response_code,
+			    AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid));
 		return AP_SM_WAIT_NONE;
 	}
 }
@@ -246,6 +250,10 @@ static enum ap_sm_wait ap_sm_write(struct ap_queue *aq)
 		return AP_SM_WAIT_AGAIN;
 	default:
 		aq->dev_state = AP_DEV_STATE_ERROR;
+		aq->last_err_rc = status.response_code;
+		AP_DBF_WARN("%s RC 0x%02hhx on 0x%02x.%04x -> AP_DEV_STATE_ERROR\n",
+			    __func__, status.response_code,
+			    AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid));
 		return AP_SM_WAIT_NONE;
 	}
 }
@@ -285,6 +293,10 @@ static enum ap_sm_wait ap_sm_reset(struct ap_queue *aq)
 	case AP_RESPONSE_CHECKSTOPPED:
 	default:
 		aq->dev_state = AP_DEV_STATE_ERROR;
+		aq->last_err_rc = status.response_code;
+		AP_DBF_WARN("%s RC 0x%02hhx on 0x%02x.%04x -> AP_DEV_STATE_ERROR\n",
+			    __func__, status.response_code,
+			    AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid));
 		return AP_SM_WAIT_NONE;
 	}
 }
@@ -324,6 +336,10 @@ static enum ap_sm_wait ap_sm_reset_wait(struct ap_queue *aq)
 	case AP_RESPONSE_CHECKSTOPPED:
 	default:
 		aq->dev_state = AP_DEV_STATE_ERROR;
+		aq->last_err_rc = status.response_code;
+		AP_DBF_WARN("%s RC 0x%02hhx on 0x%02x.%04x -> AP_DEV_STATE_ERROR\n",
+			    __func__, status.response_code,
+			    AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid));
 		return AP_SM_WAIT_NONE;
 	}
 }
@@ -361,6 +377,10 @@ static enum ap_sm_wait ap_sm_setirq_wait(struct ap_queue *aq)
 		return AP_SM_WAIT_TIMEOUT;
 	default:
 		aq->dev_state = AP_DEV_STATE_ERROR;
+		aq->last_err_rc = status.response_code;
+		AP_DBF_WARN("%s RC 0x%02hhx on 0x%02x.%04x -> AP_DEV_STATE_ERROR\n",
+			    __func__, status.response_code,
+			    AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid));
 		return AP_SM_WAIT_NONE;
 	}
 }
@@ -605,6 +625,49 @@ static ssize_t states_show(struct device *dev,
 	return rc;
 }
 static DEVICE_ATTR_RO(states);
+
+static ssize_t last_err_rc_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct ap_queue *aq = to_ap_queue(dev);
+	int rc;
+
+	spin_lock_bh(&aq->lock);
+	rc = aq->last_err_rc;
+	spin_unlock_bh(&aq->lock);
+
+	switch (rc) {
+	case AP_RESPONSE_NORMAL:
+		return scnprintf(buf, PAGE_SIZE, "NORMAL\n");
+	case AP_RESPONSE_Q_NOT_AVAIL:
+		return scnprintf(buf, PAGE_SIZE, "Q_NOT_AVAIL\n");
+	case AP_RESPONSE_RESET_IN_PROGRESS:
+		return scnprintf(buf, PAGE_SIZE, "RESET_IN_PROGRESS\n");
+	case AP_RESPONSE_DECONFIGURED:
+		return scnprintf(buf, PAGE_SIZE, "DECONFIGURED\n");
+	case AP_RESPONSE_CHECKSTOPPED:
+		return scnprintf(buf, PAGE_SIZE, "CHECKSTOPPED\n");
+	case AP_RESPONSE_BUSY:
+		return scnprintf(buf, PAGE_SIZE, "BUSY\n");
+	case AP_RESPONSE_INVALID_ADDRESS:
+		return scnprintf(buf, PAGE_SIZE, "INVALID_ADDRESS\n");
+	case AP_RESPONSE_OTHERWISE_CHANGED:
+		return scnprintf(buf, PAGE_SIZE, "OTHERWISE_CHANGED\n");
+	case AP_RESPONSE_Q_FULL:
+		return scnprintf(buf, PAGE_SIZE, "Q_FULL/NO_PENDING_REPLY\n");
+	case AP_RESPONSE_INDEX_TOO_BIG:
+		return scnprintf(buf, PAGE_SIZE, "INDEX_TOO_BIG\n");
+	case AP_RESPONSE_NO_FIRST_PART:
+		return scnprintf(buf, PAGE_SIZE, "NO_FIRST_PART\n");
+	case AP_RESPONSE_MESSAGE_TOO_BIG:
+		return scnprintf(buf, PAGE_SIZE, "MESSAGE_TOO_BIG\n");
+	case AP_RESPONSE_REQ_FAC_NOT_INST:
+		return scnprintf(buf, PAGE_SIZE, "REQ_FAC_NOT_INST\n");
+	default:
+		return scnprintf(buf, PAGE_SIZE, "response code %d\n", rc);
+	}
+}
+static DEVICE_ATTR_RO(last_err_rc);
 #endif
 
 static struct attribute *ap_queue_dev_attrs[] = {
@@ -615,6 +678,7 @@ static struct attribute *ap_queue_dev_attrs[] = {
 	&dev_attr_interrupt.attr,
 #ifdef CONFIG_ZCRYPT_DEBUG
 	&dev_attr_states.attr,
+	&dev_attr_last_err_rc.attr,
 #endif
 	NULL
 };