![Robert P. J. Day](/assets/img/avatar_default.png)
Run this: #!/bin/sh for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do echo "De-casting $f..." perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f done And then go through and reinstate those cases where code is casting pointers to non-pointers. And then drop a few hunks which conflicted with outstanding work. Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Karsten Keil <kkeil@suse.de> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Ian Kent <raven@themaw.net> Cc: Steven French <sfrench@us.ibm.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
419 lines
12 KiB
C
419 lines
12 KiB
C
/*
|
|
* linux/drivers/s390/crypto/zcrypt_pcica.c
|
|
*
|
|
* zcrypt 2.1.0
|
|
*
|
|
* Copyright (C) 2001, 2006 IBM Corporation
|
|
* Author(s): Robert Burroughs
|
|
* Eric Rossman (edrossma@us.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>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <asm/atomic.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include "ap_bus.h"
|
|
#include "zcrypt_api.h"
|
|
#include "zcrypt_error.h"
|
|
#include "zcrypt_pcica.h"
|
|
|
|
#define PCICA_MIN_MOD_SIZE 1 /* 8 bits */
|
|
#define PCICA_MAX_MOD_SIZE 256 /* 2048 bits */
|
|
|
|
#define PCICA_SPEED_RATING 2800
|
|
|
|
#define PCICA_MAX_MESSAGE_SIZE 0x3a0 /* sizeof(struct type4_lcr) */
|
|
#define PCICA_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */
|
|
|
|
#define PCICA_CLEANUP_TIME (15*HZ)
|
|
|
|
static struct ap_device_id zcrypt_pcica_ids[] = {
|
|
{ AP_DEVICE(AP_DEVICE_TYPE_PCICA) },
|
|
{ /* end of list */ },
|
|
};
|
|
|
|
#ifndef CONFIG_ZCRYPT_MONOLITHIC
|
|
MODULE_DEVICE_TABLE(ap, zcrypt_pcica_ids);
|
|
MODULE_AUTHOR("IBM Corporation");
|
|
MODULE_DESCRIPTION("PCICA Cryptographic Coprocessor device driver, "
|
|
"Copyright 2001, 2006 IBM Corporation");
|
|
MODULE_LICENSE("GPL");
|
|
#endif
|
|
|
|
static int zcrypt_pcica_probe(struct ap_device *ap_dev);
|
|
static void zcrypt_pcica_remove(struct ap_device *ap_dev);
|
|
static void zcrypt_pcica_receive(struct ap_device *, struct ap_message *,
|
|
struct ap_message *);
|
|
|
|
static struct ap_driver zcrypt_pcica_driver = {
|
|
.probe = zcrypt_pcica_probe,
|
|
.remove = zcrypt_pcica_remove,
|
|
.receive = zcrypt_pcica_receive,
|
|
.ids = zcrypt_pcica_ids,
|
|
};
|
|
|
|
/**
|
|
* Convert a ICAMEX message to a type4 MEX message.
|
|
*
|
|
* @zdev: crypto device pointer
|
|
* @zreq: crypto request pointer
|
|
* @mex: pointer to user input data
|
|
*
|
|
* Returns 0 on success or -EFAULT.
|
|
*/
|
|
static int ICAMEX_msg_to_type4MEX_msg(struct zcrypt_device *zdev,
|
|
struct ap_message *ap_msg,
|
|
struct ica_rsa_modexpo *mex)
|
|
{
|
|
unsigned char *modulus, *exponent, *message;
|
|
int mod_len;
|
|
|
|
mod_len = mex->inputdatalength;
|
|
|
|
if (mod_len <= 128) {
|
|
struct type4_sme *sme = ap_msg->message;
|
|
memset(sme, 0, sizeof(*sme));
|
|
ap_msg->length = sizeof(*sme);
|
|
sme->header.msg_fmt = TYPE4_SME_FMT;
|
|
sme->header.msg_len = sizeof(*sme);
|
|
sme->header.msg_type_code = TYPE4_TYPE_CODE;
|
|
sme->header.request_code = TYPE4_REQU_CODE;
|
|
modulus = sme->modulus + sizeof(sme->modulus) - mod_len;
|
|
exponent = sme->exponent + sizeof(sme->exponent) - mod_len;
|
|
message = sme->message + sizeof(sme->message) - mod_len;
|
|
} else {
|
|
struct type4_lme *lme = ap_msg->message;
|
|
memset(lme, 0, sizeof(*lme));
|
|
ap_msg->length = sizeof(*lme);
|
|
lme->header.msg_fmt = TYPE4_LME_FMT;
|
|
lme->header.msg_len = sizeof(*lme);
|
|
lme->header.msg_type_code = TYPE4_TYPE_CODE;
|
|
lme->header.request_code = TYPE4_REQU_CODE;
|
|
modulus = lme->modulus + sizeof(lme->modulus) - mod_len;
|
|
exponent = lme->exponent + sizeof(lme->exponent) - mod_len;
|
|
message = lme->message + sizeof(lme->message) - mod_len;
|
|
}
|
|
|
|
if (copy_from_user(modulus, mex->n_modulus, mod_len) ||
|
|
copy_from_user(exponent, mex->b_key, mod_len) ||
|
|
copy_from_user(message, mex->inputdata, mod_len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Convert a ICACRT message to a type4 CRT message.
|
|
*
|
|
* @zdev: crypto device pointer
|
|
* @zreq: crypto request pointer
|
|
* @crt: pointer to user input data
|
|
*
|
|
* Returns 0 on success or -EFAULT.
|
|
*/
|
|
static int ICACRT_msg_to_type4CRT_msg(struct zcrypt_device *zdev,
|
|
struct ap_message *ap_msg,
|
|
struct ica_rsa_modexpo_crt *crt)
|
|
{
|
|
unsigned char *p, *q, *dp, *dq, *u, *inp;
|
|
int mod_len, short_len, long_len;
|
|
|
|
mod_len = crt->inputdatalength;
|
|
short_len = mod_len / 2;
|
|
long_len = mod_len / 2 + 8;
|
|
|
|
if (mod_len <= 128) {
|
|
struct type4_scr *scr = ap_msg->message;
|
|
memset(scr, 0, sizeof(*scr));
|
|
ap_msg->length = sizeof(*scr);
|
|
scr->header.msg_type_code = TYPE4_TYPE_CODE;
|
|
scr->header.request_code = TYPE4_REQU_CODE;
|
|
scr->header.msg_fmt = TYPE4_SCR_FMT;
|
|
scr->header.msg_len = sizeof(*scr);
|
|
p = scr->p + sizeof(scr->p) - long_len;
|
|
q = scr->q + sizeof(scr->q) - short_len;
|
|
dp = scr->dp + sizeof(scr->dp) - long_len;
|
|
dq = scr->dq + sizeof(scr->dq) - short_len;
|
|
u = scr->u + sizeof(scr->u) - long_len;
|
|
inp = scr->message + sizeof(scr->message) - mod_len;
|
|
} else {
|
|
struct type4_lcr *lcr = ap_msg->message;
|
|
memset(lcr, 0, sizeof(*lcr));
|
|
ap_msg->length = sizeof(*lcr);
|
|
lcr->header.msg_type_code = TYPE4_TYPE_CODE;
|
|
lcr->header.request_code = TYPE4_REQU_CODE;
|
|
lcr->header.msg_fmt = TYPE4_LCR_FMT;
|
|
lcr->header.msg_len = sizeof(*lcr);
|
|
p = lcr->p + sizeof(lcr->p) - long_len;
|
|
q = lcr->q + sizeof(lcr->q) - short_len;
|
|
dp = lcr->dp + sizeof(lcr->dp) - long_len;
|
|
dq = lcr->dq + sizeof(lcr->dq) - short_len;
|
|
u = lcr->u + sizeof(lcr->u) - long_len;
|
|
inp = lcr->message + sizeof(lcr->message) - mod_len;
|
|
}
|
|
|
|
if (copy_from_user(p, crt->np_prime, long_len) ||
|
|
copy_from_user(q, crt->nq_prime, short_len) ||
|
|
copy_from_user(dp, crt->bp_key, long_len) ||
|
|
copy_from_user(dq, crt->bq_key, short_len) ||
|
|
copy_from_user(u, crt->u_mult_inv, long_len) ||
|
|
copy_from_user(inp, crt->inputdata, mod_len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Copy results from a type 84 reply message back to user space.
|
|
*
|
|
* @zdev: crypto device pointer
|
|
* @reply: reply AP message.
|
|
* @data: pointer to user output data
|
|
* @length: size of user output data
|
|
*
|
|
* Returns 0 on success or -EFAULT.
|
|
*/
|
|
static inline int convert_type84(struct zcrypt_device *zdev,
|
|
struct ap_message *reply,
|
|
char __user *outputdata,
|
|
unsigned int outputdatalength)
|
|
{
|
|
struct type84_hdr *t84h = reply->message;
|
|
char *data;
|
|
|
|
if (t84h->len < sizeof(*t84h) + outputdatalength) {
|
|
/* The result is too short, the PCICA card may not do that.. */
|
|
zdev->online = 0;
|
|
return -EAGAIN; /* repeat the request on a different device. */
|
|
}
|
|
BUG_ON(t84h->len > PCICA_MAX_RESPONSE_SIZE);
|
|
data = reply->message + t84h->len - outputdatalength;
|
|
if (copy_to_user(outputdata, data, outputdatalength))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int convert_response(struct zcrypt_device *zdev,
|
|
struct ap_message *reply,
|
|
char __user *outputdata,
|
|
unsigned int outputdatalength)
|
|
{
|
|
/* Response type byte is the second byte in the response. */
|
|
switch (((unsigned char *) reply->message)[1]) {
|
|
case TYPE82_RSP_CODE:
|
|
case TYPE88_RSP_CODE:
|
|
return convert_error(zdev, reply);
|
|
case TYPE84_RSP_CODE:
|
|
return convert_type84(zdev, reply,
|
|
outputdata, outputdatalength);
|
|
default: /* Unknown response type, this should NEVER EVER happen */
|
|
PRINTK("Unrecognized Message Header: %08x%08x\n",
|
|
*(unsigned int *) reply->message,
|
|
*(unsigned int *) (reply->message+4));
|
|
zdev->online = 0;
|
|
return -EAGAIN; /* repeat the request on a different device. */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function is called from the AP bus code after a crypto request
|
|
* "msg" has finished with the reply message "reply".
|
|
* It is called from tasklet context.
|
|
* @ap_dev: pointer to the AP device
|
|
* @msg: pointer to the AP message
|
|
* @reply: pointer to the AP reply message
|
|
*/
|
|
static void zcrypt_pcica_receive(struct ap_device *ap_dev,
|
|
struct ap_message *msg,
|
|
struct ap_message *reply)
|
|
{
|
|
static struct error_hdr error_reply = {
|
|
.type = TYPE82_RSP_CODE,
|
|
.reply_code = REP82_ERROR_MACHINE_FAILURE,
|
|
};
|
|
struct type84_hdr *t84h = reply->message;
|
|
int length;
|
|
|
|
/* Copy the reply message to the request message buffer. */
|
|
if (IS_ERR(reply))
|
|
memcpy(msg->message, &error_reply, sizeof(error_reply));
|
|
else if (t84h->code == TYPE84_RSP_CODE) {
|
|
length = min(PCICA_MAX_RESPONSE_SIZE, (int) t84h->len);
|
|
memcpy(msg->message, reply->message, length);
|
|
} else
|
|
memcpy(msg->message, reply->message, sizeof error_reply);
|
|
complete((struct completion *) msg->private);
|
|
}
|
|
|
|
static atomic_t zcrypt_step = ATOMIC_INIT(0);
|
|
|
|
/**
|
|
* The request distributor calls this function if it picked the PCICA
|
|
* device to handle a modexpo request.
|
|
* @zdev: pointer to zcrypt_device structure that identifies the
|
|
* PCICA device to the request distributor
|
|
* @mex: pointer to the modexpo request buffer
|
|
*/
|
|
static long zcrypt_pcica_modexpo(struct zcrypt_device *zdev,
|
|
struct ica_rsa_modexpo *mex)
|
|
{
|
|
struct ap_message ap_msg;
|
|
struct completion work;
|
|
int rc;
|
|
|
|
ap_msg.message = kmalloc(PCICA_MAX_MESSAGE_SIZE, GFP_KERNEL);
|
|
if (!ap_msg.message)
|
|
return -ENOMEM;
|
|
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
|
|
atomic_inc_return(&zcrypt_step);
|
|
ap_msg.private = &work;
|
|
rc = ICAMEX_msg_to_type4MEX_msg(zdev, &ap_msg, mex);
|
|
if (rc)
|
|
goto out_free;
|
|
init_completion(&work);
|
|
ap_queue_message(zdev->ap_dev, &ap_msg);
|
|
rc = wait_for_completion_interruptible_timeout(
|
|
&work, PCICA_CLEANUP_TIME);
|
|
if (rc > 0)
|
|
rc = convert_response(zdev, &ap_msg, mex->outputdata,
|
|
mex->outputdatalength);
|
|
else {
|
|
/* Signal pending or message timed out. */
|
|
ap_cancel_message(zdev->ap_dev, &ap_msg);
|
|
if (rc == 0)
|
|
/* Message timed out. */
|
|
rc = -ETIME;
|
|
}
|
|
out_free:
|
|
kfree(ap_msg.message);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* The request distributor calls this function if it picked the PCICA
|
|
* device to handle a modexpo_crt request.
|
|
* @zdev: pointer to zcrypt_device structure that identifies the
|
|
* PCICA device to the request distributor
|
|
* @crt: pointer to the modexpoc_crt request buffer
|
|
*/
|
|
static long zcrypt_pcica_modexpo_crt(struct zcrypt_device *zdev,
|
|
struct ica_rsa_modexpo_crt *crt)
|
|
{
|
|
struct ap_message ap_msg;
|
|
struct completion work;
|
|
int rc;
|
|
|
|
ap_msg.message = kmalloc(PCICA_MAX_MESSAGE_SIZE, GFP_KERNEL);
|
|
if (!ap_msg.message)
|
|
return -ENOMEM;
|
|
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
|
|
atomic_inc_return(&zcrypt_step);
|
|
ap_msg.private = &work;
|
|
rc = ICACRT_msg_to_type4CRT_msg(zdev, &ap_msg, crt);
|
|
if (rc)
|
|
goto out_free;
|
|
init_completion(&work);
|
|
ap_queue_message(zdev->ap_dev, &ap_msg);
|
|
rc = wait_for_completion_interruptible_timeout(
|
|
&work, PCICA_CLEANUP_TIME);
|
|
if (rc > 0)
|
|
rc = convert_response(zdev, &ap_msg, crt->outputdata,
|
|
crt->outputdatalength);
|
|
else {
|
|
/* Signal pending or message timed out. */
|
|
ap_cancel_message(zdev->ap_dev, &ap_msg);
|
|
if (rc == 0)
|
|
/* Message timed out. */
|
|
rc = -ETIME;
|
|
}
|
|
out_free:
|
|
kfree(ap_msg.message);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* The crypto operations for a PCICA card.
|
|
*/
|
|
static struct zcrypt_ops zcrypt_pcica_ops = {
|
|
.rsa_modexpo = zcrypt_pcica_modexpo,
|
|
.rsa_modexpo_crt = zcrypt_pcica_modexpo_crt,
|
|
};
|
|
|
|
/**
|
|
* Probe function for PCICA cards. It always accepts the AP device
|
|
* since the bus_match already checked the hardware type.
|
|
* @ap_dev: pointer to the AP device.
|
|
*/
|
|
static int zcrypt_pcica_probe(struct ap_device *ap_dev)
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
int rc;
|
|
|
|
zdev = zcrypt_device_alloc(PCICA_MAX_RESPONSE_SIZE);
|
|
if (!zdev)
|
|
return -ENOMEM;
|
|
zdev->ap_dev = ap_dev;
|
|
zdev->ops = &zcrypt_pcica_ops;
|
|
zdev->online = 1;
|
|
zdev->user_space_type = ZCRYPT_PCICA;
|
|
zdev->type_string = "PCICA";
|
|
zdev->min_mod_size = PCICA_MIN_MOD_SIZE;
|
|
zdev->max_mod_size = PCICA_MAX_MOD_SIZE;
|
|
zdev->speed_rating = PCICA_SPEED_RATING;
|
|
ap_dev->reply = &zdev->reply;
|
|
ap_dev->private = zdev;
|
|
rc = zcrypt_device_register(zdev);
|
|
if (rc)
|
|
goto out_free;
|
|
return 0;
|
|
|
|
out_free:
|
|
ap_dev->private = NULL;
|
|
zcrypt_device_free(zdev);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* This is called to remove the extended PCICA driver information
|
|
* if an AP device is removed.
|
|
*/
|
|
static void zcrypt_pcica_remove(struct ap_device *ap_dev)
|
|
{
|
|
struct zcrypt_device *zdev = ap_dev->private;
|
|
|
|
zcrypt_device_unregister(zdev);
|
|
}
|
|
|
|
int __init zcrypt_pcica_init(void)
|
|
{
|
|
return ap_driver_register(&zcrypt_pcica_driver, THIS_MODULE, "pcica");
|
|
}
|
|
|
|
void zcrypt_pcica_exit(void)
|
|
{
|
|
ap_driver_unregister(&zcrypt_pcica_driver);
|
|
}
|
|
|
|
#ifndef CONFIG_ZCRYPT_MONOLITHIC
|
|
module_init(zcrypt_pcica_init);
|
|
module_exit(zcrypt_pcica_exit);
|
|
#endif
|