s390/zcrypt: remove CEX2 and CEX3 device drivers

Remove the legacy device driver code for CEX2 and CEX3 cards.

The last machines which are able to handle CEX2 crypto cards
are z10 EC first available 2008 and z10 BC first available 2009.
The last machines able to handle a CEX3 crypto card are
z196 first available 2010 and z114 first available 2011.

Please note that this does not imply to drop CEX2 and CEX3
support in general. With older kernels on hardware up to the
aforementioned machine models these crypto cards will get
support by IBM.

The removal of the CEX2 and CEX3 device drivers code opens up
some simplifications, for example support for crypto cards
without rng support can be removed also.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

1 files changed, 0 insertions, 421 deletions

diff --git a/drivers/s390/crypto/zcrypt_cex2c.c b/drivers/s390/crypto/zcrypt_cex2c.c
index 251b5bd3d19c..e69de29bb2d1 100644
--- a/drivers/s390/crypto/zcrypt_cex2c.c
+++ b/drivers/s390/crypto/zcrypt_cex2c.c
@@ -1,421 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- *  Copyright IBM Corp. 2001, 2018
- *  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>
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/atomic.h>
-#include <linux/uaccess.h>
-#include <linux/mod_devicetable.h>
-
-#include "ap_bus.h"
-#include "zcrypt_api.h"
-#include "zcrypt_error.h"
-#include "zcrypt_msgtype6.h"
-#include "zcrypt_cex2c.h"
-#include "zcrypt_cca_key.h"
-#include "zcrypt_ccamisc.h"
-
-#define CEX2C_MIN_MOD_SIZE	 16	/*  128 bits	*/
-#define CEX2C_MAX_MOD_SIZE	256	/* 2048 bits	*/
-#define CEX3C_MIN_MOD_SIZE	 16	/*  128 bits	*/
-#define CEX3C_MAX_MOD_SIZE	512	/* 4096 bits	*/
-#define CEX2C_MAX_XCRB_MESSAGE_SIZE (12 * 1024)
-#define CEX2C_CLEANUP_TIME	(15 * HZ)
-
-MODULE_AUTHOR("IBM Corporation");
-MODULE_DESCRIPTION("CEX2C/CEX3C Cryptographic Coprocessor device driver, " \
-		   "Copyright IBM Corp. 2001, 2018");
-MODULE_LICENSE("GPL");
-
-static struct ap_device_id zcrypt_cex2c_card_ids[] = {
-	{ .dev_type = AP_DEVICE_TYPE_CEX2C,
-	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
-	{ .dev_type = AP_DEVICE_TYPE_CEX3C,
-	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
-	{ /* end of list */ },
-};
-
-MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_card_ids);
-
-static struct ap_device_id zcrypt_cex2c_queue_ids[] = {
-	{ .dev_type = AP_DEVICE_TYPE_CEX2C,
-	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
-	{ .dev_type = AP_DEVICE_TYPE_CEX3C,
-	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
-	{ /* end of list */ },
-};
-
-MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_queue_ids);
-
-/*
- * CCA card additional device attributes
- */
-static ssize_t cca_serialnr_show(struct device *dev,
-				 struct device_attribute *attr,
-				 char *buf)
-{
-	struct zcrypt_card *zc = dev_get_drvdata(dev);
-	struct cca_info ci;
-	struct ap_card *ac = to_ap_card(dev);
-
-	memset(&ci, 0, sizeof(ci));
-
-	if (ap_domain_index >= 0)
-		cca_get_info(ac->id, ap_domain_index, &ci, zc->online);
-
-	return sysfs_emit(buf, "%s\n", ci.serial);
-}
-
-static struct device_attribute dev_attr_cca_serialnr =
-	__ATTR(serialnr, 0444, cca_serialnr_show, NULL);
-
-static struct attribute *cca_card_attrs[] = {
-	&dev_attr_cca_serialnr.attr,
-	NULL,
-};
-
-static const struct attribute_group cca_card_attr_grp = {
-	.attrs = cca_card_attrs,
-};
-
- /*
-  * CCA queue additional device attributes
-  */
-static ssize_t cca_mkvps_show(struct device *dev,
-			      struct device_attribute *attr,
-			      char *buf)
-{
-	struct zcrypt_queue *zq = dev_get_drvdata(dev);
-	int n = 0;
-	struct cca_info ci;
-	static const char * const cao_state[] = { "invalid", "valid" };
-	static const char * const new_state[] = { "empty", "partial", "full" };
-
-	memset(&ci, 0, sizeof(ci));
-
-	cca_get_info(AP_QID_CARD(zq->queue->qid),
-		     AP_QID_QUEUE(zq->queue->qid),
-		     &ci, zq->online);
-
-	if (ci.new_aes_mk_state >= '1' && ci.new_aes_mk_state <= '3')
-		n = sysfs_emit(buf, "AES NEW: %s 0x%016llx\n",
-			       new_state[ci.new_aes_mk_state - '1'],
-			       ci.new_aes_mkvp);
-	else
-		n = sysfs_emit(buf, "AES NEW: - -\n");
-
-	if (ci.cur_aes_mk_state >= '1' && ci.cur_aes_mk_state <= '2')
-		n += sysfs_emit_at(buf, n, "AES CUR: %s 0x%016llx\n",
-				   cao_state[ci.cur_aes_mk_state - '1'],
-				   ci.cur_aes_mkvp);
-	else
-		n += sysfs_emit_at(buf, n, "AES CUR: - -\n");
-
-	if (ci.old_aes_mk_state >= '1' && ci.old_aes_mk_state <= '2')
-		n += sysfs_emit_at(buf, n, "AES OLD: %s 0x%016llx\n",
-				   cao_state[ci.old_aes_mk_state - '1'],
-				   ci.old_aes_mkvp);
-	else
-		n += sysfs_emit_at(buf, n, "AES OLD: - -\n");
-
-	if (ci.new_apka_mk_state >= '1' && ci.new_apka_mk_state <= '3')
-		n += sysfs_emit_at(buf, n, "APKA NEW: %s 0x%016llx\n",
-				   new_state[ci.new_apka_mk_state - '1'],
-				   ci.new_apka_mkvp);
-	else
-		n += sysfs_emit_at(buf, n, "APKA NEW: - -\n");
-
-	if (ci.cur_apka_mk_state >= '1' && ci.cur_apka_mk_state <= '2')
-		n += sysfs_emit_at(buf, n, "APKA CUR: %s 0x%016llx\n",
-				   cao_state[ci.cur_apka_mk_state - '1'],
-				   ci.cur_apka_mkvp);
-	else
-		n += sysfs_emit_at(buf, n, "APKA CUR: - -\n");
-
-	if (ci.old_apka_mk_state >= '1' && ci.old_apka_mk_state <= '2')
-		n += sysfs_emit_at(buf, n, "APKA OLD: %s 0x%016llx\n",
-				   cao_state[ci.old_apka_mk_state - '1'],
-				   ci.old_apka_mkvp);
-	else
-		n += sysfs_emit_at(buf, n, "APKA OLD: - -\n");
-
-	return n;
-}
-
-static struct device_attribute dev_attr_cca_mkvps =
-	__ATTR(mkvps, 0444, cca_mkvps_show, NULL);
-
-static struct attribute *cca_queue_attrs[] = {
-	&dev_attr_cca_mkvps.attr,
-	NULL,
-};
-
-static const struct attribute_group cca_queue_attr_grp = {
-	.attrs = cca_queue_attrs,
-};
-
-/*
- * Large random number detection function. Its sends a message to a CEX2C/CEX3C
- * 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_cex2c_rng_supported(struct ap_queue *aq)
-{
-	struct ap_message ap_msg;
-	unsigned long psmid;
-	unsigned int domain;
-	struct {
-		struct type86_hdr hdr;
-		struct type86_fmt2_ext fmt2;
-		struct CPRBX cprbx;
-	} __packed *reply;
-	struct {
-		struct type6_hdr hdr;
-		struct CPRBX cprbx;
-		char function_code[2];
-		short int rule_length;
-		char rule[8];
-		short int verb_length;
-		short int key_length;
-	} __packed *msg;
-	int rc, i;
-
-	ap_init_message(&ap_msg);
-	ap_msg.msg = (void *)get_zeroed_page(GFP_KERNEL);
-	if (!ap_msg.msg)
-		return -ENOMEM;
-	ap_msg.bufsize = PAGE_SIZE;
-
-	rng_type6cprb_msgx(&ap_msg, 4, &domain);
-
-	msg = ap_msg.msg;
-	msg->cprbx.domain = AP_QID_QUEUE(aq->qid);
-
-	rc = ap_send(aq->qid, 0x0102030405060708UL, ap_msg.msg, ap_msg.len);
-	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(aq->qid, &psmid, ap_msg.msg, ap_msg.bufsize);
-		if (rc == 0 && psmid == 0x0102030405060708UL)
-			break;
-	}
-
-	if (i >= 2 * HZ) {
-		/* Got no answer. */
-		rc = -ENODEV;
-		goto out_free;
-	}
-
-	reply = ap_msg.msg;
-	if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
-		rc = 1;
-	else
-		rc = 0;
-out_free:
-	free_page((unsigned long)ap_msg.msg);
-	return rc;
-}
-
-/*
- * Probe function for CEX2C/CEX3C card devices. It always accepts the
- * AP device since the bus_match already checked the hardware type.
- * @ap_dev: pointer to the AP card device.
- */
-static int zcrypt_cex2c_card_probe(struct ap_device *ap_dev)
-{
-	/*
-	 * Normalized speed ratings per crypto adapter
-	 * MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
-	 */
-	static const int CEX2C_SPEED_IDX[] = {
-		1000, 1400, 2400, 1100, 1500, 2600, 100, 12};
-	static const int CEX3C_SPEED_IDX[] = {
-		500,  700, 1400,  550,	800, 1500,  80, 10};
-
-	struct ap_card *ac = to_ap_card(&ap_dev->device);
-	struct zcrypt_card *zc;
-	int rc = 0;
-
-	zc = zcrypt_card_alloc();
-	if (!zc)
-		return -ENOMEM;
-	zc->card = ac;
-	dev_set_drvdata(&ap_dev->device, zc);
-	switch (ac->ap_dev.device_type) {
-	case AP_DEVICE_TYPE_CEX2C:
-		zc->user_space_type = ZCRYPT_CEX2C;
-		zc->type_string = "CEX2C";
-		zc->speed_rating = CEX2C_SPEED_IDX;
-		zc->min_mod_size = CEX2C_MIN_MOD_SIZE;
-		zc->max_mod_size = CEX2C_MAX_MOD_SIZE;
-		zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE;
-		break;
-	case AP_DEVICE_TYPE_CEX3C:
-		zc->user_space_type = ZCRYPT_CEX3C;
-		zc->type_string = "CEX3C";
-		zc->speed_rating = CEX3C_SPEED_IDX;
-		zc->min_mod_size = CEX3C_MIN_MOD_SIZE;
-		zc->max_mod_size = CEX3C_MAX_MOD_SIZE;
-		zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
-		break;
-	default:
-		zcrypt_card_free(zc);
-		return -ENODEV;
-	}
-	zc->online = 1;
-
-	rc = zcrypt_card_register(zc);
-	if (rc) {
-		zcrypt_card_free(zc);
-		return rc;
-	}
-
-	if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
-		rc = sysfs_create_group(&ap_dev->device.kobj,
-					&cca_card_attr_grp);
-		if (rc) {
-			zcrypt_card_unregister(zc);
-			zcrypt_card_free(zc);
-		}
-	}
-
-	return rc;
-}
-
-/*
- * This is called to remove the CEX2C/CEX3C card driver information
- * if an AP card device is removed.
- */
-static void zcrypt_cex2c_card_remove(struct ap_device *ap_dev)
-{
-	struct zcrypt_card *zc = dev_get_drvdata(&ap_dev->device);
-	struct ap_card *ac = to_ap_card(&ap_dev->device);
-
-	if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
-		sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp);
-
-	zcrypt_card_unregister(zc);
-}
-
-static struct ap_driver zcrypt_cex2c_card_driver = {
-	.probe = zcrypt_cex2c_card_probe,
-	.remove = zcrypt_cex2c_card_remove,
-	.ids = zcrypt_cex2c_card_ids,
-	.flags = AP_DRIVER_FLAG_DEFAULT,
-};
-
-/*
- * Probe function for CEX2C/CEX3C queue devices. It always accepts the
- * AP device since the bus_match already checked the hardware type.
- * @ap_dev: pointer to the AP card device.
- */
-static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev)
-{
-	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
-	struct zcrypt_queue *zq;
-	int rc;
-
-	zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE);
-	if (!zq)
-		return -ENOMEM;
-	zq->queue = aq;
-	zq->online = 1;
-	atomic_set(&zq->load, 0);
-	ap_rapq(aq->qid, 0);
-	rc = zcrypt_cex2c_rng_supported(aq);
-	if (rc < 0) {
-		zcrypt_queue_free(zq);
-		return rc;
-	}
-	if (rc)
-		zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
-					 MSGTYPE06_VARIANT_DEFAULT);
-	else
-		zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
-					 MSGTYPE06_VARIANT_NORNG);
-	ap_queue_init_state(aq);
-	ap_queue_init_reply(aq, &zq->reply);
-	aq->request_timeout = CEX2C_CLEANUP_TIME;
-	dev_set_drvdata(&ap_dev->device, zq);
-	rc = zcrypt_queue_register(zq);
-	if (rc) {
-		zcrypt_queue_free(zq);
-		return rc;
-	}
-
-	if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
-		rc = sysfs_create_group(&ap_dev->device.kobj,
-					&cca_queue_attr_grp);
-		if (rc) {
-			zcrypt_queue_unregister(zq);
-			zcrypt_queue_free(zq);
-		}
-	}
-
-	return rc;
-}
-
-/*
- * This is called to remove the CEX2C/CEX3C queue driver information
- * if an AP queue device is removed.
- */
-static void zcrypt_cex2c_queue_remove(struct ap_device *ap_dev)
-{
-	struct zcrypt_queue *zq = dev_get_drvdata(&ap_dev->device);
-	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
-
-	if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
-		sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp);
-
-	zcrypt_queue_unregister(zq);
-}
-
-static struct ap_driver zcrypt_cex2c_queue_driver = {
-	.probe = zcrypt_cex2c_queue_probe,
-	.remove = zcrypt_cex2c_queue_remove,
-	.ids = zcrypt_cex2c_queue_ids,
-	.flags = AP_DRIVER_FLAG_DEFAULT,
-};
-
-int __init zcrypt_cex2c_init(void)
-{
-	int rc;
-
-	rc = ap_driver_register(&zcrypt_cex2c_card_driver,
-				THIS_MODULE, "cex2card");
-	if (rc)
-		return rc;
-
-	rc = ap_driver_register(&zcrypt_cex2c_queue_driver,
-				THIS_MODULE, "cex2cqueue");
-	if (rc)
-		ap_driver_unregister(&zcrypt_cex2c_card_driver);
-
-	return rc;
-}
-
-void zcrypt_cex2c_exit(void)
-{
-	ap_driver_unregister(&zcrypt_cex2c_queue_driver);
-	ap_driver_unregister(&zcrypt_cex2c_card_driver);
-}
-
-module_init(zcrypt_cex2c_init);
-module_exit(zcrypt_cex2c_exit);