s390/zcrypt: zcrypt device driver cleanup
Some cleanup in the s390 zcrypt device driver:
- Removed fragments of pcixx crypto card code. This code
can't be reached anymore because the hardware detection
function does not recognize crypto cards < CEX2 since
commit f56545430736 ("s390/zcrypt: Introduce QACT support
for AP bus devices.")
- Rename of some files and driver names which where still
reflecting pcixx support to cex2a/cex2c.
- Removed all the zcrypt version strings in the file headers.
There is only one place left - the zcrypt.h header file is
now the only place for zcrypt device driver version info.
- Zcrypt version pump up from 2.2.0 to 2.2.1.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Harald Freudenberger
committed by
Martin Schwidefsky
Martin Schwidefsky
parent
78333d1f90
commit
ee410de890
292
drivers/s390/crypto/zcrypt_cex2c.c
Normal file
292
drivers/s390/crypto/zcrypt_cex2c.c
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@@ -0,0 +1,292 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright IBM Corp. 2001, 2018
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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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#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 <linux/uaccess.h>
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#include <linux/mod_devicetable.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_cex2c.h"
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#include "zcrypt_cca_key.h"
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#define CEX2C_MIN_MOD_SIZE 16 /* 128 bits */
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#define CEX2C_MAX_MOD_SIZE 256 /* 2048 bits */
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#define CEX3C_MIN_MOD_SIZE 16 /* 128 bits */
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#define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */
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#define CEX2C_MAX_XCRB_MESSAGE_SIZE (12*1024)
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#define CEX2C_CLEANUP_TIME (15*HZ)
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MODULE_AUTHOR("IBM Corporation");
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MODULE_DESCRIPTION("CEX2C/CEX3C Cryptographic Coprocessor device driver, " \
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"Copyright IBM Corp. 2001, 2018");
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MODULE_LICENSE("GPL");
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static struct ap_device_id zcrypt_cex2c_card_ids[] = {
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{ .dev_type = AP_DEVICE_TYPE_CEX2C,
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX3C,
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
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{ /* end of list */ },
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};
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MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_card_ids);
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static struct ap_device_id zcrypt_cex2c_queue_ids[] = {
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{ .dev_type = AP_DEVICE_TYPE_CEX2C,
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX3C,
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
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{ /* end of list */ },
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};
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MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_queue_ids);
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/**
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* Large random number detection function. Its sends a message to a CEX2C/CEX3C
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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_cex2c_rng_supported(struct ap_queue *aq)
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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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unsigned int domain;
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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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} __packed *reply;
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struct {
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struct type6_hdr hdr;
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struct CPRBX cprbx;
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char function_code[2];
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short int rule_length;
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char rule[8];
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short int verb_length;
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short int key_length;
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} __packed *msg;
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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_msg, 4, &domain);
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msg = ap_msg.message;
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msg->cprbx.domain = AP_QID_QUEUE(aq->qid);
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rc = ap_send(aq->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(aq->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 CEX2C/CEX3C card devices. It always accepts the
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* AP device since the bus_match already checked the hardware type.
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* @ap_dev: pointer to the AP card device.
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*/
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static int zcrypt_cex2c_card_probe(struct ap_device *ap_dev)
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{
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/*
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* Normalized speed ratings per crypto adapter
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* MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
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*/
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static const int CEX2C_SPEED_IDX[] = {
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1000, 1400, 2400, 1100, 1500, 2600, 100, 12};
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static const int CEX3C_SPEED_IDX[] = {
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500, 700, 1400, 550, 800, 1500, 80, 10};
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struct ap_card *ac = to_ap_card(&ap_dev->device);
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struct zcrypt_card *zc;
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int rc = 0;
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zc = zcrypt_card_alloc();
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if (!zc)
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return -ENOMEM;
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zc->card = ac;
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ac->private = zc;
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switch (ac->ap_dev.device_type) {
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case AP_DEVICE_TYPE_CEX2C:
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zc->user_space_type = ZCRYPT_CEX2C;
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zc->type_string = "CEX2C";
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memcpy(zc->speed_rating, CEX2C_SPEED_IDX,
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sizeof(CEX2C_SPEED_IDX));
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zc->min_mod_size = CEX2C_MIN_MOD_SIZE;
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zc->max_mod_size = CEX2C_MAX_MOD_SIZE;
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zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE;
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break;
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case AP_DEVICE_TYPE_CEX3C:
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zc->user_space_type = ZCRYPT_CEX3C;
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zc->type_string = "CEX3C";
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memcpy(zc->speed_rating, CEX3C_SPEED_IDX,
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sizeof(CEX3C_SPEED_IDX));
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zc->min_mod_size = CEX3C_MIN_MOD_SIZE;
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zc->max_mod_size = CEX3C_MAX_MOD_SIZE;
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zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
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break;
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default:
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zcrypt_card_free(zc);
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return -ENODEV;
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}
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zc->online = 1;
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rc = zcrypt_card_register(zc);
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if (rc) {
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ac->private = NULL;
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zcrypt_card_free(zc);
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}
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return rc;
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}
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/**
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* This is called to remove the CEX2C/CEX3C card driver information
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* if an AP card device is removed.
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*/
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static void zcrypt_cex2c_card_remove(struct ap_device *ap_dev)
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{
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struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private;
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if (zc)
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zcrypt_card_unregister(zc);
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}
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static struct ap_driver zcrypt_cex2c_card_driver = {
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.probe = zcrypt_cex2c_card_probe,
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.remove = zcrypt_cex2c_card_remove,
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.ids = zcrypt_cex2c_card_ids,
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.flags = AP_DRIVER_FLAG_DEFAULT,
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};
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/**
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* Probe function for CEX2C/CEX3C queue devices. It always accepts the
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* AP device since the bus_match already checked the hardware type.
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* @ap_dev: pointer to the AP card device.
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*/
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static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev)
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{
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struct ap_queue *aq = to_ap_queue(&ap_dev->device);
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struct zcrypt_queue *zq;
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int rc;
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zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE);
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if (!zq)
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return -ENOMEM;
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zq->queue = aq;
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zq->online = 1;
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atomic_set(&zq->load, 0);
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rc = zcrypt_cex2c_rng_supported(aq);
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if (rc < 0) {
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zcrypt_queue_free(zq);
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return rc;
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}
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if (rc)
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zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
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MSGTYPE06_VARIANT_DEFAULT);
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else
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zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
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MSGTYPE06_VARIANT_NORNG);
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ap_queue_init_reply(aq, &zq->reply);
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aq->request_timeout = CEX2C_CLEANUP_TIME;
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aq->private = zq;
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rc = zcrypt_queue_register(zq);
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if (rc) {
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aq->private = NULL;
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zcrypt_queue_free(zq);
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}
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return rc;
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}
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/**
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* This is called to remove the CEX2C/CEX3C queue driver information
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* if an AP queue device is removed.
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*/
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static void zcrypt_cex2c_queue_remove(struct ap_device *ap_dev)
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{
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struct ap_queue *aq = to_ap_queue(&ap_dev->device);
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struct zcrypt_queue *zq = aq->private;
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ap_queue_remove(aq);
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if (zq)
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zcrypt_queue_unregister(zq);
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}
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static struct ap_driver zcrypt_cex2c_queue_driver = {
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.probe = zcrypt_cex2c_queue_probe,
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.remove = zcrypt_cex2c_queue_remove,
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.suspend = ap_queue_suspend,
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.resume = ap_queue_resume,
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.ids = zcrypt_cex2c_queue_ids,
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.flags = AP_DRIVER_FLAG_DEFAULT,
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};
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int __init zcrypt_cex2c_init(void)
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{
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int rc;
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rc = ap_driver_register(&zcrypt_cex2c_card_driver,
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THIS_MODULE, "cex2card");
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if (rc)
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return rc;
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rc = ap_driver_register(&zcrypt_cex2c_queue_driver,
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THIS_MODULE, "cex2cqueue");
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if (rc)
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ap_driver_unregister(&zcrypt_cex2c_card_driver);
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return rc;
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}
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void zcrypt_cex2c_exit(void)
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{
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ap_driver_unregister(&zcrypt_cex2c_queue_driver);
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ap_driver_unregister(&zcrypt_cex2c_card_driver);
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}
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module_init(zcrypt_cex2c_init);
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module_exit(zcrypt_cex2c_exit);
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