// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright IBM Corp. 2001, 2018
* Author(s): Robert Burroughs
* Eric Rossman ([email protected])
* Cornelia Huck <[email protected]>
*
* Hotplug & misc device support: Jochen Roehrig ([email protected])
* Major cleanup & driver split: Martin Schwidefsky <[email protected]>
* Ralph Wuerthner <[email protected]>
* MSGTYPE restruct: Holger Dengler <[email protected]>
* Multiple device nodes: Harald Freudenberger <[email protected]>
*/
#define KMSG_COMPONENT "zcrypt"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#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 <linux/cdev.h>
#include <linux/ctype.h>
#include <linux/capability.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"
#include "zcrypt_ccamisc.h"
#include "zcrypt_ep11misc.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);
DEFINE_SPINLOCK(zcrypt_list_lock);
LIST_HEAD(zcrypt_card_list);
static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
static LIST_HEAD(zcrypt_ops_list);
/* Zcrypt related debug feature stuff. */
debug_info_t *zcrypt_dbf_info;
/*
* Process a rescan of the transport layer.
* Runs a synchronous AP bus rescan.
* Returns true if something has changed (for example the
* bus scan has found and build up new devices) and it is
* worth to do a retry. Otherwise false is returned meaning
* no changes on the AP bus level.
*/
static inline bool zcrypt_process_rescan(void)
{
return ap_bus_force_rescan();
}
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);
/*
* Multi device nodes extension functions.
*/
struct zcdn_device;
static void zcdn_device_release(struct device *dev);
static const struct class zcrypt_class = {
.name = ZCRYPT_NAME,
.dev_release = zcdn_device_release,
};
static dev_t zcrypt_devt;
static struct cdev zcrypt_cdev;
struct zcdn_device {
struct device device;
struct ap_perms perms;
};
#define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
#define ZCDN_MAX_NAME 32
static int zcdn_create(const char *name);
static int zcdn_destroy(const char *name);
/*
* Find zcdn device by name.
* Returns reference to the zcdn device which needs to be released
* with put_device() after use.
*/
static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
{
struct device *dev = class_find_device_by_name(&zcrypt_class, name);
return dev ? to_zcdn_dev(dev) : NULL;
}
/*
* Find zcdn device by devt value.
* Returns reference to the zcdn device which needs to be released
* with put_device() after use.
*/
static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
{
struct device *dev = class_find_device_by_devt(&zcrypt_class, devt);
return dev ? to_zcdn_dev(dev) : NULL;
}
static ssize_t ioctlmask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
int i, n;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
n = sysfs_emit(buf, "0x");
for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
n += sysfs_emit_at(buf, n, "\n");
mutex_unlock(&ap_perms_mutex);
return n;
}
static ssize_t ioctlmask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int rc;
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
AP_IOCTLS, &ap_perms_mutex);
if (rc)
return rc;
return count;
}
static DEVICE_ATTR_RW(ioctlmask);
static ssize_t apmask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
int i, n;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
n = sysfs_emit(buf, "0x");
for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
n += sysfs_emit_at(buf, n, "\n");
mutex_unlock(&ap_perms_mutex);
return n;
}
static ssize_t apmask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int rc;
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
AP_DEVICES, &ap_perms_mutex);
if (rc)
return rc;
return count;
}
static DEVICE_ATTR_RW(apmask);
static ssize_t aqmask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
int i, n;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
n = sysfs_emit(buf, "0x");
for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
n += sysfs_emit_at(buf, n, "\n");
mutex_unlock(&ap_perms_mutex);
return n;
}
static ssize_t aqmask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int rc;
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
AP_DOMAINS, &ap_perms_mutex);
if (rc)
return rc;
return count;
}
static DEVICE_ATTR_RW(aqmask);
static ssize_t admask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
int i, n;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
n = sysfs_emit(buf, "0x");
for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
n += sysfs_emit_at(buf, n, "\n");
mutex_unlock(&ap_perms_mutex);
return n;
}
static ssize_t admask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int rc;
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
AP_DOMAINS, &ap_perms_mutex);
if (rc)
return rc;
return count;
}
static DEVICE_ATTR_RW(admask);
static struct attribute *zcdn_dev_attrs[] = {
&dev_attr_ioctlmask.attr,
&dev_attr_apmask.attr,
&dev_attr_aqmask.attr,
&dev_attr_admask.attr,
NULL
};
static struct attribute_group zcdn_dev_attr_group = {
.attrs = zcdn_dev_attrs
};
static const struct attribute_group *zcdn_dev_attr_groups[] = {
&zcdn_dev_attr_group,
NULL
};
static ssize_t zcdn_create_store(const struct class *class,
const struct class_attribute *attr,
const char *buf, size_t count)
{
int rc;
char name[ZCDN_MAX_NAME];
strscpy(name, skip_spaces(buf), sizeof(name));
rc = zcdn_create(strim(name));
return rc ? rc : count;
}
static const struct class_attribute class_attr_zcdn_create =
__ATTR(create, 0600, NULL, zcdn_create_store);
static ssize_t zcdn_destroy_store(const struct class *class,
const struct class_attribute *attr,
const char *buf, size_t count)
{
int rc;
char name[ZCDN_MAX_NAME];
strscpy(name, skip_spaces(buf), sizeof(name));
rc = zcdn_destroy(strim(name));
return rc ? rc : count;
}
static const struct class_attribute class_attr_zcdn_destroy =
__ATTR(destroy, 0600, NULL, zcdn_destroy_store);
static void zcdn_device_release(struct device *dev)
{
struct zcdn_device *zcdndev = to_zcdn_dev(dev);
ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
__func__, MAJOR(dev->devt), MINOR(dev->devt));
kfree(zcdndev);
}
static int zcdn_create(const char *name)
{
dev_t devt;
int i, rc = 0;
struct zcdn_device *zcdndev;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
/* check if device node with this name already exists */
if (name[0]) {
zcdndev = find_zcdndev_by_name(name);
if (zcdndev) {
put_device(&zcdndev->device);
rc = -EEXIST;
goto unlockout;
}
}
/* find an unused minor number */
for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
zcdndev = find_zcdndev_by_devt(devt);
if (zcdndev)
put_device(&zcdndev->device);
else
break;
}
if (i == ZCRYPT_MAX_MINOR_NODES) {
rc = -ENOSPC;
goto unlockout;
}
/* alloc and prepare a new zcdn device */
zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
if (!zcdndev) {
rc = -ENOMEM;
goto unlockout;
}
zcdndev->device.release = zcdn_device_release;
zcdndev->device.class = &zcrypt_class;
zcdndev->device.devt = devt;
zcdndev->device.groups = zcdn_dev_attr_groups;
if (name[0])
rc = dev_set_name(&zcdndev->device, "%s", name);
else
rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt));
if (rc) {
kfree(zcdndev);
goto unlockout;
}
rc = device_register(&zcdndev->device);
if (rc) {
put_device(&zcdndev->device);
goto unlockout;
}
ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
__func__, MAJOR(devt), MINOR(devt));
unlockout:
mutex_unlock(&ap_perms_mutex);
return rc;
}
static int zcdn_destroy(const char *name)
{
int rc = 0;
struct zcdn_device *zcdndev;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
/* try to find this zcdn device */
zcdndev = find_zcdndev_by_name(name);
if (!zcdndev) {
rc = -ENOENT;
goto unlockout;
}
/*
* The zcdn device is not hard destroyed. It is subject to
* reference counting and thus just needs to be unregistered.
*/
put_device(&zcdndev->device);
device_unregister(&zcdndev->device);
unlockout:
mutex_unlock(&ap_perms_mutex);
return rc;
}
static void zcdn_destroy_all(void)
{
int i;
dev_t devt;
struct zcdn_device *zcdndev;
mutex_lock(&ap_perms_mutex);
for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
zcdndev = find_zcdndev_by_devt(devt);
if (zcdndev) {
put_device(&zcdndev->device);
device_unregister(&zcdndev->device);
}
}
mutex_unlock(&ap_perms_mutex);
}
/*
* 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 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)
{
struct ap_perms *perms = &ap_perms;
if (filp->f_inode->i_cdev == &zcrypt_cdev) {
struct zcdn_device *zcdndev;
if (mutex_lock_interruptible(&ap_perms_mutex))
return -ERESTARTSYS;
zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
/* find returns a reference, no get_device() needed */
mutex_unlock(&ap_perms_mutex);
if (zcdndev)
perms = &zcdndev->perms;
}
filp->private_data = (void *)perms;
atomic_inc(&zcrypt_open_count);
return stream_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)
{
if (filp->f_inode->i_cdev == &zcrypt_cdev) {
struct zcdn_device *zcdndev;
mutex_lock(&ap_perms_mutex);
zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
mutex_unlock(&ap_perms_mutex);
if (zcdndev) {
/* 2 puts here: one for find, one for open */
put_device(&zcdndev->device);
put_device(&zcdndev->device);
}
}
atomic_dec(&zcrypt_open_count);
return 0;
}
static inline int zcrypt_check_ioctl(struct ap_perms *perms,
unsigned int cmd)
{
int rc = -EPERM;
int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
if (test_bit_inv(ioctlnr, perms->ioctlm))
rc = 0;
}
if (rc)
ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
__func__, ioctlnr, rc);
return rc;
}
static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
{
return test_bit_inv(card, perms->apm) ? true : false;
}
static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
{
return test_bit_inv(queue, perms->aqm) ? true : false;
}
static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
struct zcrypt_queue *zq,
struct module **pmod,
unsigned int weight)
{
if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
return NULL;
zcrypt_card_get(zc);
zcrypt_queue_get(zq);
get_device(&zq->queue->ap_dev.device);
atomic_add(weight, &zc->load);
atomic_add(weight, &zq->load);
zq->request_count++;
*pmod = zq->queue->ap_dev.device.driver->owner;
return zq;
}
static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
struct zcrypt_queue *zq,
struct module *mod,
unsigned int weight)
{
zq->request_count--;
atomic_sub(weight, &zc->load);
atomic_sub(weight, &zq->load);
put_device(&zq->queue->ap_dev.device);
zcrypt_queue_put(zq);
zcrypt_card_put(zc);
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 true;
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 true;
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 ap_perms *perms,
struct zcrypt_track *tr,
struct ica_rsa_modexpo *mex)
{
struct zcrypt_card *zc, *pref_zc;
struct zcrypt_queue *zq, *pref_zq;
struct ap_message ap_msg;
unsigned int wgt = 0, pref_wgt = 0;
unsigned int func_code;
int cpen, qpen, qid = 0, rc = -ENODEV;
struct module *mod;
trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
ap_init_message(&ap_msg);
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 usable accelerator or CCA card */
if (!zc->online || !zc->card->config || zc->card->chkstop ||
!(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
continue;
/* Check for size limits */
if (zc->min_mod_size > mex->inputdatalength ||
zc->max_mod_size < mex->inputdatalength)
continue;
/* check if device node has admission for this card */
if (!zcrypt_check_card(perms, zc->card->id))
continue;
/* get weight index of the card device */
wgt = zc->speed_rating[func_code];
/* penalty if this msg was previously sent via this card */
cpen = (tr && tr->again_counter && tr->last_qid &&
AP_QID_CARD(tr->last_qid) == zc->card->id) ?
TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->rsa_modexpo ||
!ap_queue_usable(zq->queue))
continue;
/* check if device node has admission for this queue */
if (!zcrypt_check_queue(perms,
AP_QID_QUEUE(zq->queue->qid)))
continue;
/* penalty if the msg was previously sent at this qid */
qpen = (tr && tr->again_counter && tr->last_qid &&
tr->last_qid == zq->queue->qid) ?
TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
if (!zcrypt_queue_compare(zq, pref_zq,
wgt + cpen + qpen, pref_wgt))
continue;
pref_zc = zc;
pref_zq = zq;
pref_wgt = wgt + cpen + qpen;
}
}
pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
pr_debug("%s no matching queue found => ENODEV\n", __func__);
rc = -ENODEV;
goto out;
}
qid = pref_zq->queue->qid;
rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
spin_lock(&zcrypt_list_lock);
zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
spin_unlock(&zcrypt_list_lock);
out:
ap_release_message(&ap_msg);
if (tr) {
tr->last_rc = rc;
tr->last_qid = qid;
}
trace_s390_zcrypt_rep(mex, func_code, rc,
AP_QID_CARD(qid), AP_QID_QUEUE(qid));
return rc;
}
static long zcrypt_rsa_crt(struct ap_perms *perms,
struct zcrypt_track *tr,
struct ica_rsa_modexpo_crt *crt)
{
struct zcrypt_card *zc, *pref_zc;
struct zcrypt_queue *zq, *pref_zq;
struct ap_message ap_msg;
unsigned int wgt = 0, pref_wgt = 0;
unsigned int func_code;
int cpen, qpen, qid = 0, rc = -ENODEV;
struct module *mod;
trace_s390_zcrypt_req(crt, TP_ICARSACRT);
ap_init_message(&ap_msg);
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 usable accelerator or CCA card */
if (!zc->online || !zc->card->config || zc->card->chkstop ||
!(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
continue;
/* Check for size limits */
if (zc->min_mod_size > crt->inputdatalength ||
zc->max_mod_size < crt->inputdatalength)
continue;
/* check if device node has admission for this card */
if (!zcrypt_check_card(perms, zc->card->id))
continue;
/* get weight index of the card device */
wgt = zc->speed_rating[func_code];
/* penalty if this msg was previously sent via this card */
cpen = (tr && tr->again_counter && tr->last_qid &&
AP_QID_CARD(tr->last_qid) == zc->card->id) ?
TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->rsa_modexpo_crt ||
!ap_queue_usable(zq->queue))
continue;
/* check if device node has admission for this queue */
if (!zcrypt_check_queue(perms,
AP_QID_QUEUE(zq->queue->qid)))
continue;
/* penalty if the msg was previously sent at this qid */
qpen = (tr && tr->again_counter && tr->last_qid &&
tr->last_qid == zq->queue->qid) ?
TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
if (!zcrypt_queue_compare(zq, pref_zq,
wgt + cpen + qpen, pref_wgt))
continue;
pref_zc = zc;
pref_zq = zq;
pref_wgt = wgt + cpen + qpen;
}
}
pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
pr_debug("%s no matching queue found => ENODEV\n", __func__);
rc = -ENODEV;
goto out;
}
qid = pref_zq->queue->qid;
rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
spin_lock(&zcrypt_list_lock);
zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
spin_unlock(&zcrypt_list_lock);
out:
ap_release_message(&ap_msg);
if (tr) {
tr->last_rc = rc;
tr->last_qid = qid;
}
trace_s390_zcrypt_rep(crt, func_code, rc,
AP_QID_CARD(qid), AP_QID_QUEUE(qid));
return rc;
}
static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
struct zcrypt_track *tr,
struct ica_xcRB *xcrb)
{
struct zcrypt_card *zc, *pref_zc;
struct zcrypt_queue *zq, *pref_zq;
struct ap_message ap_msg;
unsigned int wgt = 0, pref_wgt = 0;
unsigned int func_code;
unsigned short *domain, tdom;
int cpen, qpen, qid = 0, rc = -ENODEV;
struct module *mod;
trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
xcrb->status = 0;
ap_init_message(&ap_msg);
rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
if (rc)
goto out;
print_hex_dump_debug("ccareq: ", DUMP_PREFIX_ADDRESS, 16, 1,
ap_msg.msg, ap_msg.len, false);
tdom = *domain;
if (perms != &ap_perms && tdom < AP_DOMAINS) {
if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
if (!test_bit_inv(tdom, perms->adm)) {
rc = -ENODEV;
goto out;
}
} else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
rc = -EOPNOTSUPP;
goto out;
}
}
/*
* If a valid target domain is set and this domain is NOT a usage
* domain but a control only domain, autoselect target domain.
*/
if (tdom < AP_DOMAINS &&
!ap_test_config_usage_domain(tdom) &&
ap_test_config_ctrl_domain(tdom))
tdom = AUTOSEL_DOM;
pref_zc = NULL;
pref_zq = NULL;
spin_lock(&zcrypt_list_lock);
for_each_zcrypt_card(zc) {
/* Check for usable CCA card */
if (!zc->online || !zc->card->config || zc->card->chkstop ||
!zc->card->hwinfo.cca)
continue;
/* Check for user selected CCA card */
if (xcrb->user_defined != AUTOSELECT &&
xcrb->user_defined != zc->card->id)
continue;
/* check if request size exceeds card max msg size */
if (ap_msg.len > zc->card->maxmsgsize)
continue;
/* check if device node has admission for this card */
if (!zcrypt_check_card(perms, zc->card->id))
continue;
/* get weight index of the card device */
wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
/* penalty if this msg was previously sent via this card */
cpen = (tr && tr->again_counter && tr->last_qid &&
AP_QID_CARD(tr->last_qid) == zc->card->id) ?
TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check for device usable and eligible */
if (!zq->online || !zq->ops->send_cprb ||
!ap_queue_usable(zq->queue) ||
(tdom != AUTOSEL_DOM &&
tdom != AP_QID_QUEUE(zq->queue->qid)))
continue;
/* check if device node has admission for this queue */
if (!zcrypt_check_queue(perms,
AP_QID_QUEUE(zq->queue->qid)))
continue;
/* penalty if the msg was previously sent at this qid */
qpen = (tr && tr->again_counter && tr->last_qid &&
tr->last_qid == zq->queue->qid) ?
TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
if (!zcrypt_queue_compare(zq, pref_zq,
wgt + cpen + qpen, pref_wgt))
continue;
pref_zc = zc;
pref_zq = zq;
pref_wgt = wgt + cpen + qpen;
}
}
pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
pr_debug("%s no match for address %02x.%04x => ENODEV\n",
__func__, xcrb->user_defined, *domain);
rc = -ENODEV;
goto out;
}
/* in case of auto select, provide the correct domain */
qid = pref_zq->queue->qid;
if (*domain == AUTOSEL_DOM)
*domain = AP_QID_QUEUE(qid);
rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
if (!rc) {
print_hex_dump_debug("ccarpl: ", DUMP_PREFIX_ADDRESS, 16, 1,
ap_msg.msg, ap_msg.len, false);
}
spin_lock(&zcrypt_list_lock);
zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
spin_unlock(&zcrypt_list_lock);
out:
ap_release_message(&ap_msg);
if (tr) {
tr->last_rc = rc;
tr->last_qid = qid;
}
trace_s390_zcrypt_rep(xcrb, func_code, rc,
AP_QID_CARD(qid), AP_QID_QUEUE(qid));
return rc;
}
long zcrypt_send_cprb(struct ica_xcRB *xcrb)
{
struct zcrypt_track tr;
int rc;
memset(&tr, 0, sizeof(tr));
do {
rc = _zcrypt_send_cprb(false, &ap_perms, &tr, xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = _zcrypt_send_cprb(false, &ap_perms, &tr, xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
if (rc)
pr_debug("%s rc=%d\n", __func__, rc);
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 (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
return true;
targets++;
}
return false;
}
static bool is_desired_ep11_queue(unsigned int dev_qid,
unsigned short target_num,
struct ep11_target_dev *targets)
{
int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
while (target_num-- > 0) {
if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
(targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
return true;
targets++;
}
return false;
}
static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
struct zcrypt_track *tr,
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 wgt = 0, pref_wgt = 0;
unsigned int func_code, domain;
struct ap_message ap_msg;
int cpen, qpen, qid = 0, rc = -ENODEV;
struct module *mod;
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 (z_copy_from_user(userspace, targets, uptr,
target_num * sizeof(*targets))) {
func_code = 0;
rc = -EFAULT;
goto out_free;
}
}
rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
if (rc)
goto out_free;
print_hex_dump_debug("ep11req: ", DUMP_PREFIX_ADDRESS, 16, 1,
ap_msg.msg, ap_msg.len, false);
if (perms != &ap_perms && domain < AUTOSEL_DOM) {
if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
if (!test_bit_inv(domain, perms->adm)) {
rc = -ENODEV;
goto out_free;
}
} else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
rc = -EOPNOTSUPP;
goto out_free;
}
}
pref_zc = NULL;
pref_zq = NULL;
spin_lock(&zcrypt_list_lock);
for_each_zcrypt_card(zc) {
/* Check for usable EP11 card */
if (!zc->online || !zc->card->config || zc->card->chkstop ||
!zc->card->hwinfo.ep11)
continue;
/* Check for user selected EP11 card */
if (targets &&
!is_desired_ep11_card(zc->card->id, target_num, targets))
continue;
/* check if request size exceeds card max msg size */
if (ap_msg.len > zc->card->maxmsgsize)
continue;
/* check if device node has admission for this card */
if (!zcrypt_check_card(perms, zc->card->id))
continue;
/* get weight index of the card device */
wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
/* penalty if this msg was previously sent via this card */
cpen = (tr && tr->again_counter && tr->last_qid &&
AP_QID_CARD(tr->last_qid) == zc->card->id) ?
TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->send_ep11_cprb ||
!ap_queue_usable(zq->queue) ||
(targets &&
!is_desired_ep11_queue(zq->queue->qid,
target_num, targets)))
continue;
/* check if device node has admission for this queue */
if (!zcrypt_check_queue(perms,
AP_QID_QUEUE(zq->queue->qid)))
continue;
/* penalty if the msg was previously sent at this qid */
qpen = (tr && tr->again_counter && tr->last_qid &&
tr->last_qid == zq->queue->qid) ?
TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
if (!zcrypt_queue_compare(zq, pref_zq,
wgt + cpen + qpen, pref_wgt))
continue;
pref_zc = zc;
pref_zq = zq;
pref_wgt = wgt + cpen + qpen;
}
}
pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
if (targets && target_num == 1) {
pr_debug("%s no match for address %02x.%04x => ENODEV\n",
__func__, (int)targets->ap_id,
(int)targets->dom_id);
} else if (targets) {
pr_debug("%s no match for %d target addrs => ENODEV\n",
__func__, (int)target_num);
} else {
pr_debug("%s no match for address ff.ffff => ENODEV\n",
__func__);
}
rc = -ENODEV;
goto out_free;
}
qid = pref_zq->queue->qid;
rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
if (!rc) {
print_hex_dump_debug("ep11rpl: ", DUMP_PREFIX_ADDRESS, 16, 1,
ap_msg.msg, ap_msg.len, false);
}
spin_lock(&zcrypt_list_lock);
zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
spin_unlock(&zcrypt_list_lock);
out_free:
kfree(targets);
out:
ap_release_message(&ap_msg);
if (tr) {
tr->last_rc = rc;
tr->last_qid = qid;
}
trace_s390_zcrypt_rep(xcrb, func_code, rc,
AP_QID_CARD(qid), AP_QID_QUEUE(qid));
return rc;
}
long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
{
struct zcrypt_track tr;
int rc;
memset(&tr, 0, sizeof(tr));
do {
rc = _zcrypt_send_ep11_cprb(false, &ap_perms, &tr, xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = _zcrypt_send_ep11_cprb(false, &ap_perms, &tr, xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
if (rc)
pr_debug("%s rc=%d\n", __func__, rc);
return rc;
}
EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
static long zcrypt_rng(char *buffer)
{
struct zcrypt_card *zc, *pref_zc;
struct zcrypt_queue *zq, *pref_zq;
unsigned int wgt = 0, pref_wgt = 0;
unsigned int func_code;
struct ap_message ap_msg;
unsigned int domain;
int qid = 0, rc = -ENODEV;
struct module *mod;
trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
ap_init_message(&ap_msg);
rc = prep_rng_ap_msg(&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 usable CCA card */
if (!zc->online || !zc->card->config || zc->card->chkstop ||
!zc->card->hwinfo.cca)
continue;
/* get weight index of the card device */
wgt = zc->speed_rating[func_code];
if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is usable and eligible */
if (!zq->online || !zq->ops->rng ||
!ap_queue_usable(zq->queue))
continue;
if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
continue;
pref_zc = zc;
pref_zq = zq;
pref_wgt = wgt;
}
}
pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
pr_debug("%s no matching queue found => ENODEV\n", __func__);
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, mod, wgt);
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->hwinfo.fac >> 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;
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->hwinfo.fac >> 26;
stat->qid = zq->queue->qid;
stat->online = zq->online ? 0x01 : 0x00;
}
}
spin_unlock(&zcrypt_list_lock);
}
EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
int zcrypt_device_status_ext(int card, int queue,
struct zcrypt_device_status_ext *devstat)
{
struct zcrypt_card *zc;
struct zcrypt_queue *zq;
memset(devstat, 0, sizeof(*devstat));
spin_lock(&zcrypt_list_lock);
for_each_zcrypt_card(zc) {
for_each_zcrypt_queue(zq, zc) {
if (card == AP_QID_CARD(zq->queue->qid) &&
queue == AP_QID_QUEUE(zq->queue->qid)) {
devstat->hwtype = zc->card->ap_dev.device_type;
devstat->functions = zc->card->hwinfo.fac >> 26;
devstat->qid = zq->queue->qid;
devstat->online = zq->online ? 0x01 : 0x00;
spin_unlock(&zcrypt_list_lock);
return 0;
}
}
}
spin_unlock(&zcrypt_list_lock);
return -ENODEV;
}
EXPORT_SYMBOL(zcrypt_device_status_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 int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
{
int rc;
struct zcrypt_track tr;
struct ica_rsa_modexpo mex;
struct ica_rsa_modexpo __user *umex = (void __user *)arg;
memset(&tr, 0, sizeof(tr));
if (copy_from_user(&mex, umex, sizeof(mex)))
return -EFAULT;
do {
rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
if (rc) {
pr_debug("ioctl ICARSAMODEXPO rc=%d\n", rc);
return rc;
}
return put_user(mex.outputdatalength, &umex->outputdatalength);
}
static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
{
int rc;
struct zcrypt_track tr;
struct ica_rsa_modexpo_crt crt;
struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
memset(&tr, 0, sizeof(tr));
if (copy_from_user(&crt, ucrt, sizeof(crt)))
return -EFAULT;
do {
rc = zcrypt_rsa_crt(perms, &tr, &crt);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = zcrypt_rsa_crt(perms, &tr, &crt);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
if (rc) {
pr_debug("ioctl ICARSACRT rc=%d\n", rc);
return rc;
}
return put_user(crt.outputdatalength, &ucrt->outputdatalength);
}
static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
{
int rc;
struct ica_xcRB xcrb;
struct zcrypt_track tr;
struct ica_xcRB __user *uxcrb = (void __user *)arg;
memset(&tr, 0, sizeof(tr));
if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
return -EFAULT;
do {
rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
if (rc)
pr_debug("ioctl ZSENDCPRB rc=%d status=0x%x\n",
rc, xcrb.status);
if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
return -EFAULT;
return rc;
}
static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
{
int rc;
struct ep11_urb xcrb;
struct zcrypt_track tr;
struct ep11_urb __user *uxcrb = (void __user *)arg;
memset(&tr, 0, sizeof(tr));
if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
return -EFAULT;
do {
rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
if (rc)
pr_debug("ioctl ZSENDEP11CPRB rc=%d\n", rc);
if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
return -EFAULT;
return rc;
}
static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
int rc;
struct ap_perms *perms =
(struct ap_perms *)filp->private_data;
rc = zcrypt_check_ioctl(perms, cmd);
if (rc)
return rc;
switch (cmd) {
case ICARSAMODEXPO:
return icarsamodexpo_ioctl(perms, arg);
case ICARSACRT:
return icarsacrt_ioctl(perms, arg);
case ZSECSENDCPRB:
return zsecsendcprb_ioctl(perms, arg);
case ZSENDEP11CPRB:
return zsendep11cprb_ioctl(perms, arg);
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 = kvcalloc(MAX_ZDEV_ENTRIES_EXT,
sizeof(struct zcrypt_device_status_ext),
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;
kvfree(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:
pr_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 ap_perms *perms, 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;
struct zcrypt_track tr;
long rc;
memset(&tr, 0, sizeof(tr));
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(perms, &tr, &mex64);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
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 ap_perms *perms, 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;
struct zcrypt_track tr;
long rc;
memset(&tr, 0, sizeof(tr));
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(perms, &tr, &crt64);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = zcrypt_rsa_crt(perms, &tr, &crt64);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
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 ap_perms *perms, struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
struct compat_ica_xcrb xcrb32;
struct zcrypt_track tr;
struct ica_xcRB xcrb64;
long rc;
memset(&tr, 0, sizeof(tr));
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(true, perms, &tr, &xcrb64);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
/* on ENODEV failure: retry once again after a requested rescan */
if (rc == -ENODEV && zcrypt_process_rescan())
do {
rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
rc = -EIO;
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)
{
int rc;
struct ap_perms *perms =
(struct ap_perms *)filp->private_data;
rc = zcrypt_check_ioctl(perms, cmd);
if (rc)
return rc;
if (cmd == ICARSAMODEXPO)
return trans_modexpo32(perms, filp, cmd, arg);
if (cmd == ICARSACRT)
return trans_modexpo_crt32(perms, filp, cmd, arg);
if (cmd == ZSECSENDCPRB)
return trans_xcrb32(perms, 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 ENODEV failure: retry once again after an AP bus 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;
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);
}
/*
* Wait until the zcrypt api is operational.
* The AP bus scan and the binding of ap devices to device drivers is
* an asynchronous job. This function waits until these initial jobs
* are done and so the zcrypt api should be ready to serve crypto
* requests - if there are resources available. The function uses an
* internal timeout of 30s. The very first caller will either wait for
* ap bus bindings complete or the timeout happens. This state will be
* remembered for further callers which will only be blocked until a
* decision is made (timeout or bindings complete).
* On timeout -ETIME is returned, on success the return value is 0.
*/
int zcrypt_wait_api_operational(void)
{
static DEFINE_MUTEX(zcrypt_wait_api_lock);
static int zcrypt_wait_api_state;
int rc;
rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
if (rc)
return rc;
switch (zcrypt_wait_api_state) {
case 0:
/* initial state, invoke wait for the ap bus complete */
rc = ap_wait_apqn_bindings_complete(
msecs_to_jiffies(ZCRYPT_WAIT_BINDINGS_COMPLETE_MS));
switch (rc) {
case 0:
/* ap bus bindings are complete */
zcrypt_wait_api_state = 1;
break;
case -EINTR:
/* interrupted, go back to caller */
break;
case -ETIME:
/* timeout */
ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
__func__);
zcrypt_wait_api_state = -ETIME;
break;
default:
/* other failure */
pr_debug("%s ap_wait_init_apqn_bindings_complete()=%d\n",
__func__, rc);
break;
}
break;
case 1:
/* a previous caller already found ap bus bindings complete */
rc = 0;
break;
default:
/* a previous caller had timeout or other failure */
rc = zcrypt_wait_api_state;
break;
}
mutex_unlock(&zcrypt_wait_api_lock);
return rc;
}
EXPORT_SYMBOL(zcrypt_wait_api_operational);
int __init zcrypt_debug_init(void)
{
zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
ZCRYPT_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);
}
static int __init zcdn_init(void)
{
int rc;
/* create a new class 'zcrypt' */
rc = class_register(&zcrypt_class);
if (rc)
goto out_class_register_failed;
/* alloc device minor range */
rc = alloc_chrdev_region(&zcrypt_devt,
0, ZCRYPT_MAX_MINOR_NODES,
ZCRYPT_NAME);
if (rc)
goto out_alloc_chrdev_failed;
cdev_init(&zcrypt_cdev, &zcrypt_fops);
zcrypt_cdev.owner = THIS_MODULE;
rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
if (rc)
goto out_cdev_add_failed;
/* need some class specific sysfs attributes */
rc = class_create_file(&zcrypt_class, &class_attr_zcdn_create);
if (rc)
goto out_class_create_file_1_failed;
rc = class_create_file(&zcrypt_class, &class_attr_zcdn_destroy);
if (rc)
goto out_class_create_file_2_failed;
return 0;
out_class_create_file_2_failed:
class_remove_file(&zcrypt_class, &class_attr_zcdn_create);
out_class_create_file_1_failed:
cdev_del(&zcrypt_cdev);
out_cdev_add_failed:
unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
out_alloc_chrdev_failed:
class_unregister(&zcrypt_class);
out_class_register_failed:
return rc;
}
static void zcdn_exit(void)
{
class_remove_file(&zcrypt_class, &class_attr_zcdn_create);
class_remove_file(&zcrypt_class, &class_attr_zcdn_destroy);
zcdn_destroy_all();
cdev_del(&zcrypt_cdev);
unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
class_unregister(&zcrypt_class);
}
/*
* 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;
rc = zcdn_init();
if (rc)
goto out;
/* Register the request sprayer. */
rc = misc_register(&zcrypt_misc_device);
if (rc < 0)
goto out_misc_register_failed;
zcrypt_msgtype6_init();
zcrypt_msgtype50_init();
return 0;
out_misc_register_failed:
zcdn_exit();
zcrypt_debug_exit();
out:
return rc;
}
/*
* zcrypt_api_exit(): Module termination.
*
* The module termination code.
*/
void __exit zcrypt_api_exit(void)
{
zcdn_exit();
misc_deregister(&zcrypt_misc_device);
zcrypt_msgtype6_exit();
zcrypt_msgtype50_exit();
zcrypt_ccamisc_exit();
zcrypt_ep11misc_exit();
zcrypt_debug_exit();
}
module_init(zcrypt_api_init);
module_exit(zcrypt_api_exit);
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