s390/ap: store TAPQ hwinfo in struct ap_card

As of now the AP card struct held only part of the
queue's hwinfo (that is the GR2 register content returned
with an TAPQ invocation). This patch reworks struct ap_card
to hold the whole hwinfo now.

As there is a nice bit field union on top of this
ap_tapq_hwinfo struct, all the ugly bit checkings can
now get replaced by simple evaluations of the required
bit field.

Suggested-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

1 files changed, 31 insertions, 38 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 5dd33155d5d5..20396eccb33b 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -357,13 +357,12 @@ EXPORT_SYMBOL(ap_test_config_ctrl_domain);
  *	   -1 invalid APQN, TAPQ error or AP queue status which
  *	      indicates there is no APQN.
  */
-static int ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac,
-			 int *q_depth, int *q_ml, bool *q_decfg, bool *q_cstop)
+static int ap_queue_info(ap_qid_t qid, struct ap_tapq_hwinfo *hwinfo,
+			 bool *decfg, bool *cstop)
 {
 	struct ap_queue_status status;
-	struct ap_tapq_gr2 tapq_info;
 
-	tapq_info.value = 0;
+	hwinfo->value = 0;
 
 	/* make sure we don't run into a specifiation exception */
 	if (AP_QID_CARD(qid) > ap_max_adapter_id ||
@@ -371,7 +370,7 @@ static int ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac,
 		return -1;
 
 	/* call TAPQ on this APQN */
-	status = ap_test_queue(qid, ap_apft_available(), &tapq_info);
+	status = ap_test_queue(qid, ap_apft_available(), hwinfo);
 
 	switch (status.response_code) {
 	case AP_RESPONSE_NORMAL:
@@ -389,15 +388,11 @@ static int ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac,
 	}
 
 	/* There should be at least one of the mode bits set */
-	if (WARN_ON_ONCE(!tapq_info.value))
+	if (WARN_ON_ONCE(!hwinfo->value))
 		return 0;
 
-	*q_type = tapq_info.at;
-	*q_fac = tapq_info.fac;
-	*q_depth = tapq_info.qd;
-	*q_ml = tapq_info.ml;
-	*q_decfg = status.response_code == AP_RESPONSE_DECONFIGURED;
-	*q_cstop = status.response_code == AP_RESPONSE_CHECKSTOPPED;
+	*decfg = status.response_code == AP_RESPONSE_DECONFIGURED;
+	*cstop = status.response_code == AP_RESPONSE_CHECKSTOPPED;
 
 	return 1;
 }
@@ -642,11 +637,11 @@ static int ap_uevent(const struct device *dev, struct kobj_uevent_env *env)
 			return rc;
 
 		/* Add MODE=<accel|cca|ep11> */
-		if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL))
+		if (ac->hwinfo.accel)
 			rc = add_uevent_var(env, "MODE=accel");
-		else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
+		else if (ac->hwinfo.cca)
 			rc = add_uevent_var(env, "MODE=cca");
-		else if (ap_test_bit(&ac->functions, AP_FUNC_EP11))
+		else if (ac->hwinfo.ep11)
 			rc = add_uevent_var(env, "MODE=ep11");
 		if (rc)
 			return rc;
@@ -654,11 +649,11 @@ static int ap_uevent(const struct device *dev, struct kobj_uevent_env *env)
 		struct ap_queue *aq = to_ap_queue(&ap_dev->device);
 
 		/* Add MODE=<accel|cca|ep11> */
-		if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL))
+		if (aq->card->hwinfo.accel)
 			rc = add_uevent_var(env, "MODE=accel");
-		else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
+		else if (aq->card->hwinfo.cca)
 			rc = add_uevent_var(env, "MODE=cca");
-		else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11))
+		else if (aq->card->hwinfo.ep11)
 			rc = add_uevent_var(env, "MODE=ep11");
 		if (rc)
 			return rc;
@@ -1799,12 +1794,12 @@ static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac)
  */
 static inline void ap_scan_domains(struct ap_card *ac)
 {
-	int rc, dom, depth, type, ml;
+	struct ap_tapq_hwinfo hwinfo;
 	bool decfg, chkstop;
 	struct ap_queue *aq;
 	struct device *dev;
-	unsigned int func;
 	ap_qid_t qid;
+	int rc, dom;
 
 	/*
 	 * Go through the configuration for the domains and compare them
@@ -1827,8 +1822,7 @@ static inline void ap_scan_domains(struct ap_card *ac)
 			goto put_dev_and_continue;
 		}
 		/* domain is valid, get info from this APQN */
-		rc = ap_queue_info(qid, &type, &func, &depth,
-				   &ml, &decfg, &chkstop);
+		rc = ap_queue_info(qid, &hwinfo, &decfg, &chkstop);
 		switch (rc) {
 		case -1:
 			if (dev) {
@@ -1955,11 +1949,11 @@ put_dev_and_continue:
  */
 static inline void ap_scan_adapter(int ap)
 {
-	int rc, dom, depth, type, comp_type, ml;
+	struct ap_tapq_hwinfo hwinfo;
+	int rc, dom, comp_type;
 	bool decfg, chkstop;
 	struct ap_card *ac;
 	struct device *dev;
-	unsigned int func;
 	ap_qid_t qid;
 
 	/* Is there currently a card device for this adapter ? */
@@ -1989,8 +1983,7 @@ static inline void ap_scan_adapter(int ap)
 	for (dom = 0; dom <= ap_max_domain_id; dom++)
 		if (ap_test_config_usage_domain(dom)) {
 			qid = AP_MKQID(ap, dom);
-			if (ap_queue_info(qid, &type, &func, &depth,
-					  &ml, &decfg, &chkstop) > 0)
+			if (ap_queue_info(qid, &hwinfo, &decfg, &chkstop) > 0)
 				break;
 		}
 	if (dom > ap_max_domain_id) {
@@ -2006,7 +1999,7 @@ static inline void ap_scan_adapter(int ap)
 		}
 		return;
 	}
-	if (!type) {
+	if (!hwinfo.at) {
 		/* No apdater type info available, an unusable adapter */
 		if (ac) {
 			AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devs\n",
@@ -2019,18 +2012,18 @@ static inline void ap_scan_adapter(int ap)
 		}
 		return;
 	}
+	hwinfo.value &= TAPQ_CARD_HWINFO_MASK; /* filter card specific hwinfo */
 	if (ac) {
 		/* Check APQN against existing card device for changes */
-		if (ac->raw_hwtype != type) {
+		if (ac->hwinfo.at != hwinfo.at) {
 			AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devs\n",
-				    __func__, ap, type);
+				    __func__, ap, hwinfo.at);
 			ap_scan_rm_card_dev_and_queue_devs(ac);
 			put_device(dev);
 			ac = NULL;
-		} else if ((ac->functions & TAPQ_CARD_FUNC_CMP_MASK) !=
-			   (func & TAPQ_CARD_FUNC_CMP_MASK)) {
+		} else if (ac->hwinfo.fac != hwinfo.fac) {
 			AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devs\n",
-				    __func__, ap, func);
+				    __func__, ap, hwinfo.fac);
 			ap_scan_rm_card_dev_and_queue_devs(ac);
 			put_device(dev);
 			ac = NULL;
@@ -2064,13 +2057,13 @@ static inline void ap_scan_adapter(int ap)
 
 	if (!ac) {
 		/* Build a new card device */
-		comp_type = ap_get_compatible_type(qid, type, func);
+		comp_type = ap_get_compatible_type(qid, hwinfo.at, hwinfo.fac);
 		if (!comp_type) {
 			AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n",
-				    __func__, ap, type);
+				    __func__, ap, hwinfo.at);
 			return;
 		}
-		ac = ap_card_create(ap, depth, type, comp_type, func, ml);
+		ac = ap_card_create(ap, hwinfo, comp_type);
 		if (!ac) {
 			AP_DBF_WARN("%s(%d) ap_card_create() failed\n",
 				    __func__, ap);
@@ -2101,13 +2094,13 @@ static inline void ap_scan_adapter(int ap)
 		get_device(dev);
 		if (decfg)
 			AP_DBF_INFO("%s(%d) new (decfg) card dev type=%d func=0x%08x created\n",
-				    __func__, ap, type, func);
+				    __func__, ap, hwinfo.at, hwinfo.fac);
 		else if (chkstop)
 			AP_DBF_INFO("%s(%d) new (chkstop) card dev type=%d func=0x%08x created\n",
-				    __func__, ap, type, func);
+				    __func__, ap, hwinfo.at, hwinfo.fac);
 		else
 			AP_DBF_INFO("%s(%d) new card dev type=%d func=0x%08x created\n",
-				    __func__, ap, type, func);
+				    __func__, ap, hwinfo.at, hwinfo.fac);
 	}
 
 	/* Verify the domains and the queue devices for this card */