kernel-fxtec-pro1x/drivers/s390/crypto/zcrypt_pcixcc.c

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/*
* zcrypt 2.1.0
*
* Copyright IBM Corp. 2001, 2012
* 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>
* MSGTYPE restruct: Holger Dengler <hd@linux.vnet.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 <linux/delay.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
#include <linux/slab.h>
#include <linux/atomic.h>
#include <asm/uaccess.h>
#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_error.h"
#include "zcrypt_msgtype6.h"
#include "zcrypt_pcixcc.h"
#include "zcrypt_cca_key.h"
#define PCIXCC_MIN_MOD_SIZE 16 /* 128 bits */
#define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */
#define PCIXCC_MAX_MOD_SIZE 256 /* 2048 bits */
#define CEX3C_MIN_MOD_SIZE PCIXCC_MIN_MOD_SIZE
#define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */
#define PCIXCC_MCL2_SPEED_RATING 7870
#define PCIXCC_MCL3_SPEED_RATING 7870
#define CEX2C_SPEED_RATING 7000
#define CEX3C_SPEED_RATING 6500
#define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c /* max size type6 v2 crt message */
#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
#define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
#define PCIXCC_CLEANUP_TIME (15*HZ)
#define CEIL4(x) ((((x)+3)/4)*4)
struct response_type {
struct completion work;
int type;
};
#define PCIXCC_RESPONSE_TYPE_ICA 0
#define PCIXCC_RESPONSE_TYPE_XCRB 1
static struct ap_device_id zcrypt_pcixcc_ids[] = {
{ AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
{ AP_DEVICE(AP_DEVICE_TYPE_CEX3C) },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, " \
"Copyright IBM Corp. 2001, 2012");
MODULE_LICENSE("GPL");
static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
static struct ap_driver zcrypt_pcixcc_driver = {
.probe = zcrypt_pcixcc_probe,
.remove = zcrypt_pcixcc_remove,
.ids = zcrypt_pcixcc_ids,
.request_timeout = PCIXCC_CLEANUP_TIME,
};
/**
* Micro-code detection function. Its sends a message to a pcixcc card
* to find out the microcode level.
* @ap_dev: pointer to the AP device.
*/
static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
{
static unsigned char msg[] = {
0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
0xF1,0x3D,0x93,0x53
};
unsigned long long psmid;
struct CPRBX *cprbx;
char *reply;
int rc, i;
reply = (void *) get_zeroed_page(GFP_KERNEL);
if (!reply)
return -ENOMEM;
rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
if (rc)
goto out_free;
/* Wait for the test message to complete. */
for (i = 0; i < 6; i++) {
mdelay(300);
rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
if (rc == 0 && psmid == 0x0102030405060708ULL)
break;
}
if (i >= 6) {
/* Got no answer. */
rc = -ENODEV;
goto out_free;
}
cprbx = (struct CPRBX *) (reply + 48);
if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
rc = ZCRYPT_PCIXCC_MCL2;
else
rc = ZCRYPT_PCIXCC_MCL3;
out_free:
free_page((unsigned long) reply);
return rc;
}
/**
* Large random number detection function. Its sends a message to a pcixcc
* card to find out if large random numbers are supported.
* @ap_dev: pointer to the AP device.
*
* Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
*/
static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
{
struct ap_message ap_msg;
unsigned long long psmid;
struct {
struct type86_hdr hdr;
struct type86_fmt2_ext fmt2;
struct CPRBX cprbx;
} __attribute__((packed)) *reply;
int rc, i;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
rng_type6CPRB_msgX(ap_dev, &ap_msg, 4);
rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, ap_msg.message,
ap_msg.length);
if (rc)
goto out_free;
/* Wait for the test message to complete. */
for (i = 0; i < 2 * HZ; i++) {
msleep(1000 / HZ);
rc = ap_recv(ap_dev->qid, &psmid, ap_msg.message, 4096);
if (rc == 0 && psmid == 0x0102030405060708ULL)
break;
}
if (i >= 2 * HZ) {
/* Got no answer. */
rc = -ENODEV;
goto out_free;
}
reply = ap_msg.message;
if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
rc = 1;
else
rc = 0;
out_free:
free_page((unsigned long) ap_msg.message);
return rc;
}
/**
* Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
* since the bus_match already checked the hardware type. The PCIXCC
* cards come in two flavours: micro code level 2 and micro code level 3.
* This is checked by sending a test message to the device.
* @ap_dev: pointer to the AP device.
*/
static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev;
int rc = 0;
zdev = zcrypt_device_alloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE);
if (!zdev)
return -ENOMEM;
zdev->ap_dev = ap_dev;
zdev->online = 1;
switch (ap_dev->device_type) {
case AP_DEVICE_TYPE_PCIXCC:
rc = zcrypt_pcixcc_mcl(ap_dev);
if (rc < 0) {
zcrypt_device_free(zdev);
return rc;
}
zdev->user_space_type = rc;
if (rc == ZCRYPT_PCIXCC_MCL2) {
zdev->type_string = "PCIXCC_MCL2";
zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
} else {
zdev->type_string = "PCIXCC_MCL3";
zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
}
break;
case AP_DEVICE_TYPE_CEX2C:
zdev->user_space_type = ZCRYPT_CEX2C;
zdev->type_string = "CEX2C";
zdev->speed_rating = CEX2C_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
break;
case AP_DEVICE_TYPE_CEX3C:
zdev->user_space_type = ZCRYPT_CEX3C;
zdev->type_string = "CEX3C";
zdev->speed_rating = CEX3C_SPEED_RATING;
zdev->min_mod_size = CEX3C_MIN_MOD_SIZE;
zdev->max_mod_size = CEX3C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
break;
default:
goto out_free;
}
rc = zcrypt_pcixcc_rng_supported(ap_dev);
if (rc < 0) {
zcrypt_device_free(zdev);
return rc;
}
if (rc)
zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_DEFAULT);
else
zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_NORNG);
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_msgtype_release(zdev->ops);
zcrypt_device_free(zdev);
return rc;
}
/**
* This is called to remove the extended PCIXCC/CEX2C driver information
* if an AP device is removed.
*/
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev = ap_dev->private;
struct zcrypt_ops *zops = zdev->ops;
zcrypt_device_unregister(zdev);
zcrypt_msgtype_release(zops);
}
int __init zcrypt_pcixcc_init(void)
{
return ap_driver_register(&zcrypt_pcixcc_driver, THIS_MODULE, "pcixcc");
}
void zcrypt_pcixcc_exit(void)
{
ap_driver_unregister(&zcrypt_pcixcc_driver);
}
module_init(zcrypt_pcixcc_init);
module_exit(zcrypt_pcixcc_exit);