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linux-sg2042/drivers/s390/crypto/zcrypt_api.c

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// 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, S_IRUSR|S_IRGRP);
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 weight, unsigned 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 weight, unsigned 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);
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:
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);
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;
}
}
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:
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);
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)
return -ENODEV;
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:
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;
} __attribute__((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);
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