369 lines
11 KiB
C
369 lines
11 KiB
C
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/*
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* zcrypt 2.1.0
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*
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* Copyright IBM Corp. 2001, 2012
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* Author(s): Robert Burroughs
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* Eric Rossman (edrossma@us.ibm.com)
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*
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* Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
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* Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Ralph Wuerthner <rwuerthn@de.ibm.com>
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* MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/atomic.h>
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#include <asm/uaccess.h>
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#include "ap_bus.h"
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#include "zcrypt_api.h"
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#include "zcrypt_error.h"
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#include "zcrypt_msgtype6.h"
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#include "zcrypt_pcixcc.h"
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#include "zcrypt_cca_key.h"
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#define PCIXCC_MIN_MOD_SIZE 16 /* 128 bits */
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#define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */
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#define PCIXCC_MAX_MOD_SIZE 256 /* 2048 bits */
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#define CEX3C_MIN_MOD_SIZE PCIXCC_MIN_MOD_SIZE
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#define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */
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#define PCIXCC_MCL2_SPEED_RATING 7870
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#define PCIXCC_MCL3_SPEED_RATING 7870
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#define CEX2C_SPEED_RATING 7000
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#define CEX3C_SPEED_RATING 6500
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#define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c /* max size type6 v2 crt message */
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#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
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#define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
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#define PCIXCC_CLEANUP_TIME (15*HZ)
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#define CEIL4(x) ((((x)+3)/4)*4)
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struct response_type {
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struct completion work;
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int type;
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};
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#define PCIXCC_RESPONSE_TYPE_ICA 0
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#define PCIXCC_RESPONSE_TYPE_XCRB 1
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static struct ap_device_id zcrypt_pcixcc_ids[] = {
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{ AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
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{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
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{ AP_DEVICE(AP_DEVICE_TYPE_CEX3C) },
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{ /* end of list */ },
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};
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MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
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MODULE_AUTHOR("IBM Corporation");
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MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, " \
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"Copyright IBM Corp. 2001, 2012");
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MODULE_LICENSE("GPL");
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static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
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static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
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static struct ap_driver zcrypt_pcixcc_driver = {
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.probe = zcrypt_pcixcc_probe,
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.remove = zcrypt_pcixcc_remove,
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.ids = zcrypt_pcixcc_ids,
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.request_timeout = PCIXCC_CLEANUP_TIME,
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};
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/**
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* Micro-code detection function. Its sends a message to a pcixcc card
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* to find out the microcode level.
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* @ap_dev: pointer to the AP device.
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*/
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static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
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{
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static unsigned char msg[] = {
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0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
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0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
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0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
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0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
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0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
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0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
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0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
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0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
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0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
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0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
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0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
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0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
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0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
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0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
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0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
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0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
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0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
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0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
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0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
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0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
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0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
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0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
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0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
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0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
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0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
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0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
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0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
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0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
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0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
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0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
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0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
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0xF1,0x3D,0x93,0x53
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};
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unsigned long long psmid;
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struct CPRBX *cprbx;
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char *reply;
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int rc, i;
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reply = (void *) get_zeroed_page(GFP_KERNEL);
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if (!reply)
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return -ENOMEM;
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rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
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if (rc)
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goto out_free;
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/* Wait for the test message to complete. */
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for (i = 0; i < 6; i++) {
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msleep(300);
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rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
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if (rc == 0 && psmid == 0x0102030405060708ULL)
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break;
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}
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if (i >= 6) {
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/* Got no answer. */
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rc = -ENODEV;
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goto out_free;
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}
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cprbx = (struct CPRBX *) (reply + 48);
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if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
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rc = ZCRYPT_PCIXCC_MCL2;
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else
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rc = ZCRYPT_PCIXCC_MCL3;
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out_free:
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free_page((unsigned long) reply);
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return rc;
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}
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/**
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* Large random number detection function. Its sends a message to a pcixcc
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* card to find out if large random numbers are supported.
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* @ap_dev: pointer to the AP device.
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*
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* Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
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*/
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static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
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{
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struct ap_message ap_msg;
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unsigned long long psmid;
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struct {
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struct type86_hdr hdr;
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struct type86_fmt2_ext fmt2;
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struct CPRBX cprbx;
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} __attribute__((packed)) *reply;
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int rc, i;
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ap_init_message(&ap_msg);
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ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
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if (!ap_msg.message)
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return -ENOMEM;
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rng_type6CPRB_msgX(ap_dev, &ap_msg, 4);
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rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, ap_msg.message,
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ap_msg.length);
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if (rc)
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goto out_free;
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/* Wait for the test message to complete. */
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for (i = 0; i < 2 * HZ; i++) {
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msleep(1000 / HZ);
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rc = ap_recv(ap_dev->qid, &psmid, ap_msg.message, 4096);
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if (rc == 0 && psmid == 0x0102030405060708ULL)
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break;
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}
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if (i >= 2 * HZ) {
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/* Got no answer. */
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rc = -ENODEV;
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goto out_free;
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}
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reply = ap_msg.message;
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if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
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rc = 1;
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else
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rc = 0;
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out_free:
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free_page((unsigned long) ap_msg.message);
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return rc;
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}
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/**
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* Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
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* since the bus_match already checked the hardware type. The PCIXCC
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* cards come in two flavours: micro code level 2 and micro code level 3.
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* This is checked by sending a test message to the device.
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* @ap_dev: pointer to the AP device.
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*/
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static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
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{
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struct zcrypt_device *zdev;
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int rc = 0;
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zdev = zcrypt_device_alloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE);
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if (!zdev)
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return -ENOMEM;
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zdev->ap_dev = ap_dev;
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zdev->online = 1;
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switch (ap_dev->device_type) {
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case AP_DEVICE_TYPE_PCIXCC:
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rc = zcrypt_pcixcc_mcl(ap_dev);
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if (rc < 0) {
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zcrypt_device_free(zdev);
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return rc;
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}
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zdev->user_space_type = rc;
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if (rc == ZCRYPT_PCIXCC_MCL2) {
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zdev->type_string = "PCIXCC_MCL2";
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|
|
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_device_init_reply(ap_dev, &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);
|