Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1306 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
new file mode 100644
index 000000000..b7cb897cd
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -0,0 +1,1306 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  zcrypt 2.1.0
+ *
+ *  Copyright IBM Corp. 2001, 2012
+ *  Author(s): Robert Burroughs
+ *	       Eric Rossman (edrossma@us.ibm.com)
+ *	       Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *				  Ralph Wuerthner <rwuerthn@de.ibm.com>
+ *  MSGTYPE restruct:		  Holger Dengler <hd@linux.vnet.ibm.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/compat.h>
+#include <linux/slab.h>
+#include <linux/atomic.h>
+#include <linux/uaccess.h>
+#include <linux/hw_random.h>
+#include <linux/debugfs.h>
+#include <asm/debug.h>
+
+#define CREATE_TRACE_POINTS
+#include <asm/trace/zcrypt.h>
+
+#include "zcrypt_api.h"
+#include "zcrypt_debug.h"
+
+#include "zcrypt_msgtype6.h"
+#include "zcrypt_msgtype50.h"
+
+/*
+ * Module description.
+ */
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
+		   "Copyright IBM Corp. 2001, 2012");
+MODULE_LICENSE("GPL");
+
+/*
+ * zcrypt tracepoint functions
+ */
+EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
+EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
+
+static int zcrypt_hwrng_seed = 1;
+module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
+MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
+
+DEFINE_SPINLOCK(zcrypt_list_lock);
+LIST_HEAD(zcrypt_card_list);
+int zcrypt_device_count;
+
+static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
+static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
+
+atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
+EXPORT_SYMBOL(zcrypt_rescan_req);
+
+static LIST_HEAD(zcrypt_ops_list);
+
+/* Zcrypt related debug feature stuff. */
+debug_info_t *zcrypt_dbf_info;
+
+/**
+ * Process a rescan of the transport layer.
+ *
+ * Returns 1, if the rescan has been processed, otherwise 0.
+ */
+static inline int zcrypt_process_rescan(void)
+{
+	if (atomic_read(&zcrypt_rescan_req)) {
+		atomic_set(&zcrypt_rescan_req, 0);
+		atomic_inc(&zcrypt_rescan_count);
+		ap_bus_force_rescan();
+		ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
+			   atomic_inc_return(&zcrypt_rescan_count));
+		return 1;
+	}
+	return 0;
+}
+
+void zcrypt_msgtype_register(struct zcrypt_ops *zops)
+{
+	list_add_tail(&zops->list, &zcrypt_ops_list);
+}
+
+void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
+{
+	list_del_init(&zops->list);
+}
+
+struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
+{
+	struct zcrypt_ops *zops;
+
+	list_for_each_entry(zops, &zcrypt_ops_list, list)
+		if ((zops->variant == variant) &&
+		    (!strncmp(zops->name, name, sizeof(zops->name))))
+			return zops;
+	return NULL;
+}
+EXPORT_SYMBOL(zcrypt_msgtype);
+
+/**
+ * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
+ *
+ * This function is not supported beyond zcrypt 1.3.1.
+ */
+static ssize_t zcrypt_read(struct file *filp, char __user *buf,
+			   size_t count, loff_t *f_pos)
+{
+	return -EPERM;
+}
+
+/**
+ * zcrypt_write(): Not allowed.
+ *
+ * Write is is not allowed
+ */
+static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
+			    size_t count, loff_t *f_pos)
+{
+	return -EPERM;
+}
+
+/**
+ * zcrypt_open(): Count number of users.
+ *
+ * Device open function to count number of users.
+ */
+static int zcrypt_open(struct inode *inode, struct file *filp)
+{
+	atomic_inc(&zcrypt_open_count);
+	return nonseekable_open(inode, filp);
+}
+
+/**
+ * zcrypt_release(): Count number of users.
+ *
+ * Device close function to count number of users.
+ */
+static int zcrypt_release(struct inode *inode, struct file *filp)
+{
+	atomic_dec(&zcrypt_open_count);
+	return 0;
+}
+
+static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
+						     struct zcrypt_queue *zq,
+						     unsigned int weight)
+{
+	if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
+		return NULL;
+	zcrypt_queue_get(zq);
+	get_device(&zq->queue->ap_dev.device);
+	atomic_add(weight, &zc->load);
+	atomic_add(weight, &zq->load);
+	zq->request_count++;
+	return zq;
+}
+
+static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
+				     struct zcrypt_queue *zq,
+				     unsigned int weight)
+{
+	struct module *mod = zq->queue->ap_dev.drv->driver.owner;
+
+	zq->request_count--;
+	atomic_sub(weight, &zc->load);
+	atomic_sub(weight, &zq->load);
+	put_device(&zq->queue->ap_dev.device);
+	zcrypt_queue_put(zq);
+	module_put(mod);
+}
+
+static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
+				       struct zcrypt_card *pref_zc,
+				       unsigned int weight,
+				       unsigned int pref_weight)
+{
+	if (!pref_zc)
+		return false;
+	weight += atomic_read(&zc->load);
+	pref_weight += atomic_read(&pref_zc->load);
+	if (weight == pref_weight)
+		return atomic64_read(&zc->card->total_request_count) >
+			atomic64_read(&pref_zc->card->total_request_count);
+	return weight > pref_weight;
+}
+
+static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
+					struct zcrypt_queue *pref_zq,
+					unsigned int weight,
+					unsigned int pref_weight)
+{
+	if (!pref_zq)
+		return false;
+	weight += atomic_read(&zq->load);
+	pref_weight += atomic_read(&pref_zq->load);
+	if (weight == pref_weight)
+		return zq->queue->total_request_count >
+			pref_zq->queue->total_request_count;
+	return weight > pref_weight;
+}
+
+/*
+ * zcrypt ioctls.
+ */
+static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
+{
+	struct zcrypt_card *zc, *pref_zc;
+	struct zcrypt_queue *zq, *pref_zq;
+	unsigned int weight, pref_weight;
+	unsigned int func_code;
+	int qid = 0, rc = -ENODEV;
+
+	trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
+
+	if (mex->outputdatalength < mex->inputdatalength) {
+		func_code = 0;
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/*
+	 * As long as outputdatalength is big enough, we can set the
+	 * outputdatalength equal to the inputdatalength, since that is the
+	 * number of bytes we will copy in any case
+	 */
+	mex->outputdatalength = mex->inputdatalength;
+
+	rc = get_rsa_modex_fc(mex, &func_code);
+	if (rc)
+		goto out;
+
+	pref_zc = NULL;
+	pref_zq = NULL;
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		/* Check for online accelarator and CCA cards */
+		if (!zc->online || !(zc->card->functions & 0x18000000))
+			continue;
+		/* Check for size limits */
+		if (zc->min_mod_size > mex->inputdatalength ||
+		    zc->max_mod_size < mex->inputdatalength)
+			continue;
+		/* get weight index of the card device	*/
+		weight = zc->speed_rating[func_code];
+		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
+			continue;
+		for_each_zcrypt_queue(zq, zc) {
+			/* check if device is online and eligible */
+			if (!zq->online || !zq->ops->rsa_modexpo)
+				continue;
+			if (zcrypt_queue_compare(zq, pref_zq,
+						 weight, pref_weight))
+				continue;
+			pref_zc = zc;
+			pref_zq = zq;
+			pref_weight = weight;
+		}
+	}
+	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+	if (!pref_zq) {
+		rc = -ENODEV;
+		goto out;
+	}
+
+	qid = pref_zq->queue->qid;
+	rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
+
+	spin_lock(&zcrypt_list_lock);
+	zcrypt_drop_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+out:
+	trace_s390_zcrypt_rep(mex, func_code, rc,
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+	return rc;
+}
+
+static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
+{
+	struct zcrypt_card *zc, *pref_zc;
+	struct zcrypt_queue *zq, *pref_zq;
+	unsigned int weight, pref_weight;
+	unsigned int func_code;
+	int qid = 0, rc = -ENODEV;
+
+	trace_s390_zcrypt_req(crt, TP_ICARSACRT);
+
+	if (crt->outputdatalength < crt->inputdatalength) {
+		func_code = 0;
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/*
+	 * As long as outputdatalength is big enough, we can set the
+	 * outputdatalength equal to the inputdatalength, since that is the
+	 * number of bytes we will copy in any case
+	 */
+	crt->outputdatalength = crt->inputdatalength;
+
+	rc = get_rsa_crt_fc(crt, &func_code);
+	if (rc)
+		goto out;
+
+	pref_zc = NULL;
+	pref_zq = NULL;
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		/* Check for online accelarator and CCA cards */
+		if (!zc->online || !(zc->card->functions & 0x18000000))
+			continue;
+		/* Check for size limits */
+		if (zc->min_mod_size > crt->inputdatalength ||
+		    zc->max_mod_size < crt->inputdatalength)
+			continue;
+		/* get weight index of the card device	*/
+		weight = zc->speed_rating[func_code];
+		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
+			continue;
+		for_each_zcrypt_queue(zq, zc) {
+			/* check if device is online and eligible */
+			if (!zq->online || !zq->ops->rsa_modexpo_crt)
+				continue;
+			if (zcrypt_queue_compare(zq, pref_zq,
+						 weight, pref_weight))
+				continue;
+			pref_zc = zc;
+			pref_zq = zq;
+			pref_weight = weight;
+		}
+	}
+	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+	if (!pref_zq) {
+		rc = -ENODEV;
+		goto out;
+	}
+
+	qid = pref_zq->queue->qid;
+	rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
+
+	spin_lock(&zcrypt_list_lock);
+	zcrypt_drop_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+out:
+	trace_s390_zcrypt_rep(crt, func_code, rc,
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+	return rc;
+}
+
+long zcrypt_send_cprb(struct ica_xcRB *xcRB)
+{
+	struct zcrypt_card *zc, *pref_zc;
+	struct zcrypt_queue *zq, *pref_zq;
+	struct ap_message ap_msg;
+	unsigned int weight, pref_weight;
+	unsigned int func_code;
+	unsigned short *domain;
+	int qid = 0, rc = -ENODEV;
+
+	trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
+
+	ap_init_message(&ap_msg);
+	rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
+	if (rc)
+		goto out;
+
+	pref_zc = NULL;
+	pref_zq = NULL;
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		/* Check for online CCA cards */
+		if (!zc->online || !(zc->card->functions & 0x10000000))
+			continue;
+		/* Check for user selected CCA card */
+		if (xcRB->user_defined != AUTOSELECT &&
+		    xcRB->user_defined != zc->card->id)
+			continue;
+		/* get weight index of the card device	*/
+		weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
+		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
+			continue;
+		for_each_zcrypt_queue(zq, zc) {
+			/* check if device is online and eligible */
+			if (!zq->online ||
+			    !zq->ops->send_cprb ||
+			    ((*domain != (unsigned short) AUTOSELECT) &&
+			     (*domain != AP_QID_QUEUE(zq->queue->qid))))
+				continue;
+			if (zcrypt_queue_compare(zq, pref_zq,
+						 weight, pref_weight))
+				continue;
+			pref_zc = zc;
+			pref_zq = zq;
+			pref_weight = weight;
+		}
+	}
+	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+	if (!pref_zq) {
+		rc = -ENODEV;
+		goto out;
+	}
+
+	/* in case of auto select, provide the correct domain */
+	qid = pref_zq->queue->qid;
+	if (*domain == (unsigned short) AUTOSELECT)
+		*domain = AP_QID_QUEUE(qid);
+
+	rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
+
+	spin_lock(&zcrypt_list_lock);
+	zcrypt_drop_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+out:
+	ap_release_message(&ap_msg);
+	trace_s390_zcrypt_rep(xcRB, func_code, rc,
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+	return rc;
+}
+EXPORT_SYMBOL(zcrypt_send_cprb);
+
+static bool is_desired_ep11_card(unsigned int dev_id,
+				 unsigned short target_num,
+				 struct ep11_target_dev *targets)
+{
+	while (target_num-- > 0) {
+		if (dev_id == targets->ap_id)
+			return true;
+		targets++;
+	}
+	return false;
+}
+
+static bool is_desired_ep11_queue(unsigned int dev_qid,
+				  unsigned short target_num,
+				  struct ep11_target_dev *targets)
+{
+	while (target_num-- > 0) {
+		if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
+			return true;
+		targets++;
+	}
+	return false;
+}
+
+static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
+{
+	struct zcrypt_card *zc, *pref_zc;
+	struct zcrypt_queue *zq, *pref_zq;
+	struct ep11_target_dev *targets;
+	unsigned short target_num;
+	unsigned int weight, pref_weight;
+	unsigned int func_code;
+	struct ap_message ap_msg;
+	int qid = 0, rc = -ENODEV;
+
+	trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
+
+	ap_init_message(&ap_msg);
+
+	target_num = (unsigned short) xcrb->targets_num;
+
+	/* empty list indicates autoselect (all available targets) */
+	targets = NULL;
+	if (target_num != 0) {
+		struct ep11_target_dev __user *uptr;
+
+		targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
+		if (!targets) {
+			func_code = 0;
+			rc = -ENOMEM;
+			goto out;
+		}
+
+		uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
+		if (copy_from_user(targets, uptr,
+				   target_num * sizeof(*targets))) {
+			func_code = 0;
+			rc = -EFAULT;
+			goto out_free;
+		}
+	}
+
+	rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
+	if (rc)
+		goto out_free;
+
+	pref_zc = NULL;
+	pref_zq = NULL;
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		/* Check for online EP11 cards */
+		if (!zc->online || !(zc->card->functions & 0x04000000))
+			continue;
+		/* Check for user selected EP11 card */
+		if (targets &&
+		    !is_desired_ep11_card(zc->card->id, target_num, targets))
+			continue;
+		/* get weight index of the card device	*/
+		weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
+		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
+			continue;
+		for_each_zcrypt_queue(zq, zc) {
+			/* check if device is online and eligible */
+			if (!zq->online ||
+			    !zq->ops->send_ep11_cprb ||
+			    (targets &&
+			     !is_desired_ep11_queue(zq->queue->qid,
+						    target_num, targets)))
+				continue;
+			if (zcrypt_queue_compare(zq, pref_zq,
+						 weight, pref_weight))
+				continue;
+			pref_zc = zc;
+			pref_zq = zq;
+			pref_weight = weight;
+		}
+	}
+	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+	if (!pref_zq) {
+		rc = -ENODEV;
+		goto out_free;
+	}
+
+	qid = pref_zq->queue->qid;
+	rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
+
+	spin_lock(&zcrypt_list_lock);
+	zcrypt_drop_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+out_free:
+	kfree(targets);
+out:
+	ap_release_message(&ap_msg);
+	trace_s390_zcrypt_rep(xcrb, func_code, rc,
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+	return rc;
+}
+
+static long zcrypt_rng(char *buffer)
+{
+	struct zcrypt_card *zc, *pref_zc;
+	struct zcrypt_queue *zq, *pref_zq;
+	unsigned int weight, pref_weight;
+	unsigned int func_code;
+	struct ap_message ap_msg;
+	unsigned int domain;
+	int qid = 0, rc = -ENODEV;
+
+	trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
+
+	ap_init_message(&ap_msg);
+	rc = get_rng_fc(&ap_msg, &func_code, &domain);
+	if (rc)
+		goto out;
+
+	pref_zc = NULL;
+	pref_zq = NULL;
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		/* Check for online CCA cards */
+		if (!zc->online || !(zc->card->functions & 0x10000000))
+			continue;
+		/* get weight index of the card device	*/
+		weight = zc->speed_rating[func_code];
+		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
+			continue;
+		for_each_zcrypt_queue(zq, zc) {
+			/* check if device is online and eligible */
+			if (!zq->online || !zq->ops->rng)
+				continue;
+			if (zcrypt_queue_compare(zq, pref_zq,
+						 weight, pref_weight))
+				continue;
+			pref_zc = zc;
+			pref_zq = zq;
+			pref_weight = weight;
+		}
+	}
+	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+	if (!pref_zq) {
+		rc = -ENODEV;
+		goto out;
+	}
+
+	qid = pref_zq->queue->qid;
+	rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
+
+	spin_lock(&zcrypt_list_lock);
+	zcrypt_drop_queue(pref_zc, pref_zq, weight);
+	spin_unlock(&zcrypt_list_lock);
+
+out:
+	ap_release_message(&ap_msg);
+	trace_s390_zcrypt_rep(buffer, func_code, rc,
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+	return rc;
+}
+
+static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	struct zcrypt_device_status *stat;
+	int card, queue;
+
+	memset(devstatus, 0, MAX_ZDEV_ENTRIES
+	       * sizeof(struct zcrypt_device_status));
+
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			card = AP_QID_CARD(zq->queue->qid);
+			if (card >= MAX_ZDEV_CARDIDS)
+				continue;
+			queue = AP_QID_QUEUE(zq->queue->qid);
+			stat = &devstatus[card * AP_DOMAINS + queue];
+			stat->hwtype = zc->card->ap_dev.device_type;
+			stat->functions = zc->card->functions >> 26;
+			stat->qid = zq->queue->qid;
+			stat->online = zq->online ? 0x01 : 0x00;
+		}
+	}
+	spin_unlock(&zcrypt_list_lock);
+}
+
+void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	struct zcrypt_device_status_ext *stat;
+	int card, queue;
+
+	memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
+	       * sizeof(struct zcrypt_device_status_ext));
+
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			card = AP_QID_CARD(zq->queue->qid);
+			queue = AP_QID_QUEUE(zq->queue->qid);
+			stat = &devstatus[card * AP_DOMAINS + queue];
+			stat->hwtype = zc->card->ap_dev.device_type;
+			stat->functions = zc->card->functions >> 26;
+			stat->qid = zq->queue->qid;
+			stat->online = zq->online ? 0x01 : 0x00;
+		}
+	}
+	spin_unlock(&zcrypt_list_lock);
+}
+EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
+
+static void zcrypt_status_mask(char status[], size_t max_adapters)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	int card;
+
+	memset(status, 0, max_adapters);
+	spin_lock(&zcrypt_list_lock);
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			card = AP_QID_CARD(zq->queue->qid);
+			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
+			    || card >= max_adapters)
+				continue;
+			status[card] = zc->online ? zc->user_space_type : 0x0d;
+		}
+	}
+	spin_unlock(&zcrypt_list_lock);
+}
+
+static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	int card;
+
+	memset(qdepth, 0, max_adapters);
+	spin_lock(&zcrypt_list_lock);
+	local_bh_disable();
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			card = AP_QID_CARD(zq->queue->qid);
+			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
+			    || card >= max_adapters)
+				continue;
+			spin_lock(&zq->queue->lock);
+			qdepth[card] =
+				zq->queue->pendingq_count +
+				zq->queue->requestq_count;
+			spin_unlock(&zq->queue->lock);
+		}
+	}
+	local_bh_enable();
+	spin_unlock(&zcrypt_list_lock);
+}
+
+static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	int card;
+	u64 cnt;
+
+	memset(reqcnt, 0, sizeof(int) * max_adapters);
+	spin_lock(&zcrypt_list_lock);
+	local_bh_disable();
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			card = AP_QID_CARD(zq->queue->qid);
+			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
+			    || card >= max_adapters)
+				continue;
+			spin_lock(&zq->queue->lock);
+			cnt = zq->queue->total_request_count;
+			spin_unlock(&zq->queue->lock);
+			reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
+		}
+	}
+	local_bh_enable();
+	spin_unlock(&zcrypt_list_lock);
+}
+
+static int zcrypt_pendingq_count(void)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	int pendingq_count;
+
+	pendingq_count = 0;
+	spin_lock(&zcrypt_list_lock);
+	local_bh_disable();
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
+				continue;
+			spin_lock(&zq->queue->lock);
+			pendingq_count += zq->queue->pendingq_count;
+			spin_unlock(&zq->queue->lock);
+		}
+	}
+	local_bh_enable();
+	spin_unlock(&zcrypt_list_lock);
+	return pendingq_count;
+}
+
+static int zcrypt_requestq_count(void)
+{
+	struct zcrypt_card *zc;
+	struct zcrypt_queue *zq;
+	int requestq_count;
+
+	requestq_count = 0;
+	spin_lock(&zcrypt_list_lock);
+	local_bh_disable();
+	for_each_zcrypt_card(zc) {
+		for_each_zcrypt_queue(zq, zc) {
+			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
+				continue;
+			spin_lock(&zq->queue->lock);
+			requestq_count += zq->queue->requestq_count;
+			spin_unlock(&zq->queue->lock);
+		}
+	}
+	local_bh_enable();
+	spin_unlock(&zcrypt_list_lock);
+	return requestq_count;
+}
+
+static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
+				  unsigned long arg)
+{
+	int rc = 0;
+
+	switch (cmd) {
+	case ICARSAMODEXPO: {
+		struct ica_rsa_modexpo __user *umex = (void __user *) arg;
+		struct ica_rsa_modexpo mex;
+
+		if (copy_from_user(&mex, umex, sizeof(mex)))
+			return -EFAULT;
+		do {
+			rc = zcrypt_rsa_modexpo(&mex);
+		} while (rc == -EAGAIN);
+		/* on failure: retry once again after a requested rescan */
+		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+			do {
+				rc = zcrypt_rsa_modexpo(&mex);
+			} while (rc == -EAGAIN);
+		if (rc) {
+			ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
+			return rc;
+		}
+		return put_user(mex.outputdatalength, &umex->outputdatalength);
+	}
+	case ICARSACRT: {
+		struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
+		struct ica_rsa_modexpo_crt crt;
+
+		if (copy_from_user(&crt, ucrt, sizeof(crt)))
+			return -EFAULT;
+		do {
+			rc = zcrypt_rsa_crt(&crt);
+		} while (rc == -EAGAIN);
+		/* on failure: retry once again after a requested rescan */
+		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+			do {
+				rc = zcrypt_rsa_crt(&crt);
+			} while (rc == -EAGAIN);
+		if (rc) {
+			ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
+			return rc;
+		}
+		return put_user(crt.outputdatalength, &ucrt->outputdatalength);
+	}
+	case ZSECSENDCPRB: {
+		struct ica_xcRB __user *uxcRB = (void __user *) arg;
+		struct ica_xcRB xcRB;
+
+		if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
+			return -EFAULT;
+		do {
+			rc = zcrypt_send_cprb(&xcRB);
+		} while (rc == -EAGAIN);
+		/* on failure: retry once again after a requested rescan */
+		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+			do {
+				rc = zcrypt_send_cprb(&xcRB);
+			} while (rc == -EAGAIN);
+		if (rc)
+			ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
+		if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
+			return -EFAULT;
+		return rc;
+	}
+	case ZSENDEP11CPRB: {
+		struct ep11_urb __user *uxcrb = (void __user *)arg;
+		struct ep11_urb xcrb;
+
+		if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
+			return -EFAULT;
+		do {
+			rc = zcrypt_send_ep11_cprb(&xcrb);
+		} while (rc == -EAGAIN);
+		/* on failure: retry once again after a requested rescan */
+		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+			do {
+				rc = zcrypt_send_ep11_cprb(&xcrb);
+			} while (rc == -EAGAIN);
+		if (rc)
+			ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
+		if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
+			return -EFAULT;
+		return rc;
+	}
+	case ZCRYPT_DEVICE_STATUS: {
+		struct zcrypt_device_status_ext *device_status;
+		size_t total_size = MAX_ZDEV_ENTRIES_EXT
+			* sizeof(struct zcrypt_device_status_ext);
+
+		device_status = kzalloc(total_size, GFP_KERNEL);
+		if (!device_status)
+			return -ENOMEM;
+		zcrypt_device_status_mask_ext(device_status);
+		if (copy_to_user((char __user *) arg, device_status,
+				 total_size))
+			rc = -EFAULT;
+		kfree(device_status);
+		return rc;
+	}
+	case ZCRYPT_STATUS_MASK: {
+		char status[AP_DEVICES];
+
+		zcrypt_status_mask(status, AP_DEVICES);
+		if (copy_to_user((char __user *) arg, status, sizeof(status)))
+			return -EFAULT;
+		return 0;
+	}
+	case ZCRYPT_QDEPTH_MASK: {
+		char qdepth[AP_DEVICES];
+
+		zcrypt_qdepth_mask(qdepth, AP_DEVICES);
+		if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
+			return -EFAULT;
+		return 0;
+	}
+	case ZCRYPT_PERDEV_REQCNT: {
+		u32 *reqcnt;
+
+		reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
+		if (!reqcnt)
+			return -ENOMEM;
+		zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
+		if (copy_to_user((int __user *) arg, reqcnt,
+				 sizeof(u32) * AP_DEVICES))
+			rc = -EFAULT;
+		kfree(reqcnt);
+		return rc;
+	}
+	case Z90STAT_REQUESTQ_COUNT:
+		return put_user(zcrypt_requestq_count(), (int __user *) arg);
+	case Z90STAT_PENDINGQ_COUNT:
+		return put_user(zcrypt_pendingq_count(), (int __user *) arg);
+	case Z90STAT_TOTALOPEN_COUNT:
+		return put_user(atomic_read(&zcrypt_open_count),
+				(int __user *) arg);
+	case Z90STAT_DOMAIN_INDEX:
+		return put_user(ap_domain_index, (int __user *) arg);
+	/*
+	 * Deprecated ioctls
+	 */
+	case ZDEVICESTATUS: {
+		/* the old ioctl supports only 64 adapters */
+		struct zcrypt_device_status *device_status;
+		size_t total_size = MAX_ZDEV_ENTRIES
+			* sizeof(struct zcrypt_device_status);
+
+		device_status = kzalloc(total_size, GFP_KERNEL);
+		if (!device_status)
+			return -ENOMEM;
+		zcrypt_device_status_mask(device_status);
+		if (copy_to_user((char __user *) arg, device_status,
+				 total_size))
+			rc = -EFAULT;
+		kfree(device_status);
+		return rc;
+	}
+	case Z90STAT_STATUS_MASK: {
+		/* the old ioctl supports only 64 adapters */
+		char status[MAX_ZDEV_CARDIDS];
+
+		zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
+		if (copy_to_user((char __user *) arg, status, sizeof(status)))
+			return -EFAULT;
+		return 0;
+	}
+	case Z90STAT_QDEPTH_MASK: {
+		/* the old ioctl supports only 64 adapters */
+		char qdepth[MAX_ZDEV_CARDIDS];
+
+		zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
+		if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
+			return -EFAULT;
+		return 0;
+	}
+	case Z90STAT_PERDEV_REQCNT: {
+		/* the old ioctl supports only 64 adapters */
+		u32 reqcnt[MAX_ZDEV_CARDIDS];
+
+		zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
+		if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
+			return -EFAULT;
+		return 0;
+	}
+	/* unknown ioctl number */
+	default:
+		ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
+		return -ENOIOCTLCMD;
+	}
+}
+
+#ifdef CONFIG_COMPAT
+/*
+ * ioctl32 conversion routines
+ */
+struct compat_ica_rsa_modexpo {
+	compat_uptr_t	inputdata;
+	unsigned int	inputdatalength;
+	compat_uptr_t	outputdata;
+	unsigned int	outputdatalength;
+	compat_uptr_t	b_key;
+	compat_uptr_t	n_modulus;
+};
+
+static long trans_modexpo32(struct file *filp, unsigned int cmd,
+			    unsigned long arg)
+{
+	struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
+	struct compat_ica_rsa_modexpo mex32;
+	struct ica_rsa_modexpo mex64;
+	long rc;
+
+	if (copy_from_user(&mex32, umex32, sizeof(mex32)))
+		return -EFAULT;
+	mex64.inputdata = compat_ptr(mex32.inputdata);
+	mex64.inputdatalength = mex32.inputdatalength;
+	mex64.outputdata = compat_ptr(mex32.outputdata);
+	mex64.outputdatalength = mex32.outputdatalength;
+	mex64.b_key = compat_ptr(mex32.b_key);
+	mex64.n_modulus = compat_ptr(mex32.n_modulus);
+	do {
+		rc = zcrypt_rsa_modexpo(&mex64);
+	} while (rc == -EAGAIN);
+	/* on failure: retry once again after a requested rescan */
+	if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+		do {
+			rc = zcrypt_rsa_modexpo(&mex64);
+		} while (rc == -EAGAIN);
+	if (rc)
+		return rc;
+	return put_user(mex64.outputdatalength,
+			&umex32->outputdatalength);
+}
+
+struct compat_ica_rsa_modexpo_crt {
+	compat_uptr_t	inputdata;
+	unsigned int	inputdatalength;
+	compat_uptr_t	outputdata;
+	unsigned int	outputdatalength;
+	compat_uptr_t	bp_key;
+	compat_uptr_t	bq_key;
+	compat_uptr_t	np_prime;
+	compat_uptr_t	nq_prime;
+	compat_uptr_t	u_mult_inv;
+};
+
+static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
+				unsigned long arg)
+{
+	struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
+	struct compat_ica_rsa_modexpo_crt crt32;
+	struct ica_rsa_modexpo_crt crt64;
+	long rc;
+
+	if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
+		return -EFAULT;
+	crt64.inputdata = compat_ptr(crt32.inputdata);
+	crt64.inputdatalength = crt32.inputdatalength;
+	crt64.outputdata = compat_ptr(crt32.outputdata);
+	crt64.outputdatalength = crt32.outputdatalength;
+	crt64.bp_key = compat_ptr(crt32.bp_key);
+	crt64.bq_key = compat_ptr(crt32.bq_key);
+	crt64.np_prime = compat_ptr(crt32.np_prime);
+	crt64.nq_prime = compat_ptr(crt32.nq_prime);
+	crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
+	do {
+		rc = zcrypt_rsa_crt(&crt64);
+	} while (rc == -EAGAIN);
+	/* on failure: retry once again after a requested rescan */
+	if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+		do {
+			rc = zcrypt_rsa_crt(&crt64);
+		} while (rc == -EAGAIN);
+	if (rc)
+		return rc;
+	return put_user(crt64.outputdatalength,
+			&ucrt32->outputdatalength);
+}
+
+struct compat_ica_xcRB {
+	unsigned short	agent_ID;
+	unsigned int	user_defined;
+	unsigned short	request_ID;
+	unsigned int	request_control_blk_length;
+	unsigned char	padding1[16 - sizeof(compat_uptr_t)];
+	compat_uptr_t	request_control_blk_addr;
+	unsigned int	request_data_length;
+	char		padding2[16 - sizeof(compat_uptr_t)];
+	compat_uptr_t	request_data_address;
+	unsigned int	reply_control_blk_length;
+	char		padding3[16 - sizeof(compat_uptr_t)];
+	compat_uptr_t	reply_control_blk_addr;
+	unsigned int	reply_data_length;
+	char		padding4[16 - sizeof(compat_uptr_t)];
+	compat_uptr_t	reply_data_addr;
+	unsigned short	priority_window;
+	unsigned int	status;
+} __packed;
+
+static long trans_xcRB32(struct file *filp, unsigned int cmd,
+			 unsigned long arg)
+{
+	struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
+	struct compat_ica_xcRB xcRB32;
+	struct ica_xcRB xcRB64;
+	long rc;
+
+	if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
+		return -EFAULT;
+	xcRB64.agent_ID = xcRB32.agent_ID;
+	xcRB64.user_defined = xcRB32.user_defined;
+	xcRB64.request_ID = xcRB32.request_ID;
+	xcRB64.request_control_blk_length =
+		xcRB32.request_control_blk_length;
+	xcRB64.request_control_blk_addr =
+		compat_ptr(xcRB32.request_control_blk_addr);
+	xcRB64.request_data_length =
+		xcRB32.request_data_length;
+	xcRB64.request_data_address =
+		compat_ptr(xcRB32.request_data_address);
+	xcRB64.reply_control_blk_length =
+		xcRB32.reply_control_blk_length;
+	xcRB64.reply_control_blk_addr =
+		compat_ptr(xcRB32.reply_control_blk_addr);
+	xcRB64.reply_data_length = xcRB32.reply_data_length;
+	xcRB64.reply_data_addr =
+		compat_ptr(xcRB32.reply_data_addr);
+	xcRB64.priority_window = xcRB32.priority_window;
+	xcRB64.status = xcRB32.status;
+	do {
+		rc = zcrypt_send_cprb(&xcRB64);
+	} while (rc == -EAGAIN);
+	/* on failure: retry once again after a requested rescan */
+	if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+		do {
+			rc = zcrypt_send_cprb(&xcRB64);
+		} while (rc == -EAGAIN);
+	xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
+	xcRB32.reply_data_length = xcRB64.reply_data_length;
+	xcRB32.status = xcRB64.status;
+	if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
+		return -EFAULT;
+	return rc;
+}
+
+static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
+			 unsigned long arg)
+{
+	if (cmd == ICARSAMODEXPO)
+		return trans_modexpo32(filp, cmd, arg);
+	if (cmd == ICARSACRT)
+		return trans_modexpo_crt32(filp, cmd, arg);
+	if (cmd == ZSECSENDCPRB)
+		return trans_xcRB32(filp, cmd, arg);
+	return zcrypt_unlocked_ioctl(filp, cmd, arg);
+}
+#endif
+
+/*
+ * Misc device file operations.
+ */
+static const struct file_operations zcrypt_fops = {
+	.owner		= THIS_MODULE,
+	.read		= zcrypt_read,
+	.write		= zcrypt_write,
+	.unlocked_ioctl	= zcrypt_unlocked_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= zcrypt_compat_ioctl,
+#endif
+	.open		= zcrypt_open,
+	.release	= zcrypt_release,
+	.llseek		= no_llseek,
+};
+
+/*
+ * Misc device.
+ */
+static struct miscdevice zcrypt_misc_device = {
+	.minor	    = MISC_DYNAMIC_MINOR,
+	.name	    = "z90crypt",
+	.fops	    = &zcrypt_fops,
+};
+
+static int zcrypt_rng_device_count;
+static u32 *zcrypt_rng_buffer;
+static int zcrypt_rng_buffer_index;
+static DEFINE_MUTEX(zcrypt_rng_mutex);
+
+static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
+{
+	int rc;
+
+	/*
+	 * We don't need locking here because the RNG API guarantees serialized
+	 * read method calls.
+	 */
+	if (zcrypt_rng_buffer_index == 0) {
+		rc = zcrypt_rng((char *) zcrypt_rng_buffer);
+		/* on failure: retry once again after a requested rescan */
+		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
+			rc = zcrypt_rng((char *) zcrypt_rng_buffer);
+		if (rc < 0)
+			return -EIO;
+		zcrypt_rng_buffer_index = rc / sizeof(*data);
+	}
+	*data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
+	return sizeof(*data);
+}
+
+static struct hwrng zcrypt_rng_dev = {
+	.name		= "zcrypt",
+	.data_read	= zcrypt_rng_data_read,
+	.quality	= 990,
+};
+
+int zcrypt_rng_device_add(void)
+{
+	int rc = 0;
+
+	mutex_lock(&zcrypt_rng_mutex);
+	if (zcrypt_rng_device_count == 0) {
+		zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
+		if (!zcrypt_rng_buffer) {
+			rc = -ENOMEM;
+			goto out;
+		}
+		zcrypt_rng_buffer_index = 0;
+		if (!zcrypt_hwrng_seed)
+			zcrypt_rng_dev.quality = 0;
+		rc = hwrng_register(&zcrypt_rng_dev);
+		if (rc)
+			goto out_free;
+		zcrypt_rng_device_count = 1;
+	} else
+		zcrypt_rng_device_count++;
+	mutex_unlock(&zcrypt_rng_mutex);
+	return 0;
+
+out_free:
+	free_page((unsigned long) zcrypt_rng_buffer);
+out:
+	mutex_unlock(&zcrypt_rng_mutex);
+	return rc;
+}
+
+void zcrypt_rng_device_remove(void)
+{
+	mutex_lock(&zcrypt_rng_mutex);
+	zcrypt_rng_device_count--;
+	if (zcrypt_rng_device_count == 0) {
+		hwrng_unregister(&zcrypt_rng_dev);
+		free_page((unsigned long) zcrypt_rng_buffer);
+	}
+	mutex_unlock(&zcrypt_rng_mutex);
+}
+
+int __init zcrypt_debug_init(void)
+{
+	zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
+					 DBF_MAX_SPRINTF_ARGS * sizeof(long));
+	debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
+	debug_set_level(zcrypt_dbf_info, DBF_ERR);
+
+	return 0;
+}
+
+void zcrypt_debug_exit(void)
+{
+	debug_unregister(zcrypt_dbf_info);
+}
+
+/**
+ * zcrypt_api_init(): Module initialization.
+ *
+ * The module initialization code.
+ */
+int __init zcrypt_api_init(void)
+{
+	int rc;
+
+	rc = zcrypt_debug_init();
+	if (rc)
+		goto out;
+
+	/* Register the request sprayer. */
+	rc = misc_register(&zcrypt_misc_device);
+	if (rc < 0)
+		goto out;
+
+	zcrypt_msgtype6_init();
+	zcrypt_msgtype50_init();
+	return 0;
+
+out:
+	return rc;
+}
+
+/**
+ * zcrypt_api_exit(): Module termination.
+ *
+ * The module termination code.
+ */
+void __exit zcrypt_api_exit(void)
+{
+	misc_deregister(&zcrypt_misc_device);
+	zcrypt_msgtype6_exit();
+	zcrypt_msgtype50_exit();
+	zcrypt_debug_exit();
+}
+
+module_init(zcrypt_api_init);
+module_exit(zcrypt_api_exit);