v4.19.13 snapshot.
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
new file mode 100644
index 0000000..e685412
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -0,0 +1,1299 @@
+// 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 atomic_read(&zc->card->total_request_count) >
+ atomic_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) {
+ 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) {
+ 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) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
+ if (copy_from_user(targets, uptr,
+ target_num * sizeof(*targets))) {
+ 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(int reqcnt[], size_t max_adapters)
+{
+ struct zcrypt_card *zc;
+ struct zcrypt_queue *zq;
+ int card;
+
+ 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);
+ reqcnt[card] = zq->queue->total_request_count;
+ spin_unlock(&zq->queue->lock);
+ }
+ }
+ 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: {
+ int *reqcnt;
+
+ reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
+ if (!reqcnt)
+ return -ENOMEM;
+ zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
+ if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
+ 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 */
+ int 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);