cregit-Linux how code gets into the kernel

Release 4.11 drivers/s390/crypto/zcrypt_cex4.c

/*
 *  Copyright IBM Corp. 2012
 *  Author(s): Holger Dengler <hd@linux.vnet.ibm.com>
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/atomic.h>
#include <linux/uaccess.h>
#include <linux/mod_devicetable.h>

#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_msgtype6.h"
#include "zcrypt_msgtype50.h"
#include "zcrypt_error.h"
#include "zcrypt_cex4.h"


#define CEX4A_MIN_MOD_SIZE	  1	
/*    8 bits    */

#define CEX4A_MAX_MOD_SIZE_2K	256	
/* 2048 bits    */

#define CEX4A_MAX_MOD_SIZE_4K	512	
/* 4096 bits    */


#define CEX4C_MIN_MOD_SIZE	 16	
/*  256 bits    */

#define CEX4C_MAX_MOD_SIZE	512	
/* 4096 bits    */


#define CEX4A_MAX_MESSAGE_SIZE	MSGTYPE50_CRB3_MAX_MSG_SIZE

#define CEX4C_MAX_MESSAGE_SIZE	MSGTYPE06_MAX_MSG_SIZE

/* Waiting time for requests to be processed.
 * Currently there are some types of request which are not deterministic.
 * But the maximum time limit managed by the stomper code is set to 60sec.
 * Hence we have to wait at least that time period.
 */

#define CEX4_CLEANUP_TIME	(900*HZ)

MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \
		   "Copyright IBM Corp. 2012");
MODULE_LICENSE("GPL");


static struct ap_device_id zcrypt_cex4_card_ids[] = {
	{ .dev_type = AP_DEVICE_TYPE_CEX4,
	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
	{ .dev_type = AP_DEVICE_TYPE_CEX5,
	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
	{ /* end of list */ },
};

MODULE_DEVICE_TABLE(ap, zcrypt_cex4_card_ids);


static struct ap_device_id zcrypt_cex4_queue_ids[] = {
	{ .dev_type = AP_DEVICE_TYPE_CEX4,
	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
	{ .dev_type = AP_DEVICE_TYPE_CEX5,
	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
	{ /* end of list */ },
};

MODULE_DEVICE_TABLE(ap, zcrypt_cex4_queue_ids);

/**
 * Probe function for CEX4 card device. 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_cex4_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 CEX4A_SPEED_IDX[] = { 5, 6, 59, 20, 115, 581, 0, 0}; static const int CEX5A_SPEED_IDX[] = { 3, 3, 6, 8, 32, 218, 0, 0}; static const int CEX4C_SPEED_IDX[] = { 24, 25, 82, 41, 138, 1111, 79, 8}; static const int CEX5C_SPEED_IDX[] = { 10, 14, 23, 17, 45, 242, 63, 4}; static const int CEX4P_SPEED_IDX[] = { 142, 198, 1852, 203, 331, 1563, 0, 8}; static const int CEX5P_SPEED_IDX[] = { 49, 67, 131, 52, 85, 287, 0, 4}; 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; ac->private = zc; if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) { if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) { zc->type_string = "CEX4A"; zc->user_space_type = ZCRYPT_CEX4; memcpy(zc->speed_rating, CEX4A_SPEED_IDX, sizeof(CEX4A_SPEED_IDX)); } else { zc->type_string = "CEX5A"; zc->user_space_type = ZCRYPT_CEX5; memcpy(zc->speed_rating, CEX5A_SPEED_IDX, sizeof(CEX5A_SPEED_IDX)); } zc->min_mod_size = CEX4A_MIN_MOD_SIZE; if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) && ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) { zc->max_mod_size = CEX4A_MAX_MOD_SIZE_4K; zc->max_exp_bit_length = CEX4A_MAX_MOD_SIZE_4K; } else { zc->max_mod_size = CEX4A_MAX_MOD_SIZE_2K; zc->max_exp_bit_length = CEX4A_MAX_MOD_SIZE_2K; } } else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) { if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) { zc->type_string = "CEX4C"; /* wrong user space type, must be CEX4 * just keep it for cca compatibility */ zc->user_space_type = ZCRYPT_CEX3C; memcpy(zc->speed_rating, CEX4C_SPEED_IDX, sizeof(CEX4C_SPEED_IDX)); } else { zc->type_string = "CEX5C"; /* wrong user space type, must be CEX5 * just keep it for cca compatibility */ zc->user_space_type = ZCRYPT_CEX3C; memcpy(zc->speed_rating, CEX5C_SPEED_IDX, sizeof(CEX5C_SPEED_IDX)); } zc->min_mod_size = CEX4C_MIN_MOD_SIZE; zc->max_mod_size = CEX4C_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE; } else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) { if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) { zc->type_string = "CEX4P"; zc->user_space_type = ZCRYPT_CEX4; memcpy(zc->speed_rating, CEX4P_SPEED_IDX, sizeof(CEX4P_SPEED_IDX)); } else { zc->type_string = "CEX5P"; zc->user_space_type = ZCRYPT_CEX5; memcpy(zc->speed_rating, CEX5P_SPEED_IDX, sizeof(CEX5P_SPEED_IDX)); } zc->min_mod_size = CEX4C_MIN_MOD_SIZE; zc->max_mod_size = CEX4C_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE; } else { zcrypt_card_free(zc); return -ENODEV; } zc->online = 1; rc = zcrypt_card_register(zc); if (rc) { ac->private = NULL; zcrypt_card_free(zc); } return rc; }

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PersonTokensPropCommitsCommitProp
Ingo Tuchscherer47079.66%480.00%
Holger Dengler12020.34%120.00%
Total590100.00%5100.00%

/** * This is called to remove the CEX4 card driver information * if an AP card device is removed. */
static void zcrypt_cex4_card_remove(struct ap_device *ap_dev) { struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private; if (zc) zcrypt_card_unregister(zc); }

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Ingo Tuchscherer35100.00%2100.00%
Total35100.00%2100.00%

static struct ap_driver zcrypt_cex4_card_driver = { .probe = zcrypt_cex4_card_probe, .remove = zcrypt_cex4_card_remove, .ids = zcrypt_cex4_card_ids, }; /** * Probe function for CEX4 queue device. 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_cex4_queue_probe(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq; int rc; if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) { zq = zcrypt_queue_alloc(CEX4A_MAX_MESSAGE_SIZE); if (!zq) return -ENOMEM; zq->ops = zcrypt_msgtype(MSGTYPE50_NAME, MSGTYPE50_VARIANT_DEFAULT); } else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) { zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE); if (!zq) return -ENOMEM; zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, MSGTYPE06_VARIANT_DEFAULT); } else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) { zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE); if (!zq) return -ENOMEM; zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, MSGTYPE06_VARIANT_EP11); } else { return -ENODEV; } zq->queue = aq; zq->online = 1; atomic_set(&zq->load, 0); ap_queue_init_reply(aq, &zq->reply); aq->request_timeout = CEX4_CLEANUP_TIME, aq->private = zq; rc = zcrypt_queue_register(zq); if (rc) { aq->private = NULL; zcrypt_queue_free(zq); } return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Ingo Tuchscherer19279.67%466.67%
Holger Dengler4819.92%116.67%
Martin Schwidefsky10.41%116.67%
Total241100.00%6100.00%

/** * This is called to remove the CEX4 queue driver information * if an AP queue device is removed. */
static void zcrypt_cex4_queue_remove(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq = aq->private; ap_queue_remove(aq); if (zq) zcrypt_queue_unregister(zq); }

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Ingo Tuchscherer2451.06%150.00%
Holger Dengler2348.94%150.00%
Total47100.00%2100.00%

static struct ap_driver zcrypt_cex4_queue_driver = { .probe = zcrypt_cex4_queue_probe, .remove = zcrypt_cex4_queue_remove, .suspend = ap_queue_suspend, .resume = ap_queue_resume, .ids = zcrypt_cex4_queue_ids, };
int __init zcrypt_cex4_init(void) { int rc; rc = ap_driver_register(&zcrypt_cex4_card_driver, THIS_MODULE, "cex4card"); if (rc) return rc; rc = ap_driver_register(&zcrypt_cex4_queue_driver, THIS_MODULE, "cex4queue"); if (rc) ap_driver_unregister(&zcrypt_cex4_card_driver); return rc; }

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Ingo Tuchscherer3869.09%150.00%
Holger Dengler1730.91%150.00%
Total55100.00%2100.00%


void __exit zcrypt_cex4_exit(void) { ap_driver_unregister(&zcrypt_cex4_queue_driver); ap_driver_unregister(&zcrypt_cex4_card_driver); }

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Holger Dengler1365.00%150.00%
Ingo Tuchscherer735.00%150.00%
Total20100.00%2100.00%

module_init(zcrypt_cex4_init); module_exit(zcrypt_cex4_exit);

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PersonTokensPropCommitsCommitProp
Ingo Tuchscherer89572.35%675.00%
Holger Dengler34127.57%112.50%
Martin Schwidefsky10.08%112.50%
Total1237100.00%8100.00%
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