314 lines
8.9 KiB
C
314 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright IBM Corp. 2012
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* Author(s): 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/slab.h>
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#include <linux/init.h>
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#include <linux/err.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_msgtype6.h"
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#include "zcrypt_msgtype50.h"
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#include "zcrypt_error.h"
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#include "zcrypt_cex4.h"
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#define CEX4A_MIN_MOD_SIZE 1 /* 8 bits */
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#define CEX4A_MAX_MOD_SIZE_2K 256 /* 2048 bits */
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#define CEX4A_MAX_MOD_SIZE_4K 512 /* 4096 bits */
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#define CEX4C_MIN_MOD_SIZE 16 /* 256 bits */
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#define CEX4C_MAX_MOD_SIZE 512 /* 4096 bits */
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#define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE
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#define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE
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/* Waiting time for requests to be processed.
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* Currently there are some types of request which are not deterministic.
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* But the maximum time limit managed by the stomper code is set to 60sec.
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* Hence we have to wait at least that time period.
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*/
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#define CEX4_CLEANUP_TIME (900*HZ)
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MODULE_AUTHOR("IBM Corporation");
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MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \
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"Copyright IBM Corp. 2012");
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MODULE_LICENSE("GPL");
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static struct ap_device_id zcrypt_cex4_card_ids[] = {
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{ .dev_type = AP_DEVICE_TYPE_CEX4,
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX5,
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX6,
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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_cex4_card_ids);
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static struct ap_device_id zcrypt_cex4_queue_ids[] = {
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{ .dev_type = AP_DEVICE_TYPE_CEX4,
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX5,
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX6,
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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_cex4_queue_ids);
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/**
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* Probe function for CEX4 card device. It always accepts the AP device
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* since the bus_match already checked the hardware type.
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* @ap_dev: pointer to the AP device.
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*/
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static int zcrypt_cex4_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 CEX4A_SPEED_IDX[] = {
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14, 19, 249, 42, 228, 1458, 0, 0};
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static const int CEX5A_SPEED_IDX[] = {
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8, 9, 20, 18, 66, 458, 0, 0};
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static const int CEX6A_SPEED_IDX[] = {
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6, 9, 20, 17, 65, 438, 0, 0};
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static const int CEX4C_SPEED_IDX[] = {
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59, 69, 308, 83, 278, 2204, 209, 40};
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static const int CEX5C_SPEED_IDX[] = {
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24, 31, 50, 37, 90, 479, 27, 10};
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static const int CEX6C_SPEED_IDX[] = {
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16, 20, 32, 27, 77, 455, 23, 9};
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static const int CEX4P_SPEED_IDX[] = {
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224, 313, 3560, 359, 605, 2827, 0, 50};
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static const int CEX5P_SPEED_IDX[] = {
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63, 84, 156, 83, 142, 533, 0, 10};
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static const int CEX6P_SPEED_IDX[] = {
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55, 70, 121, 73, 129, 522, 0, 9};
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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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if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) {
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if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
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zc->type_string = "CEX4A";
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zc->user_space_type = ZCRYPT_CEX4;
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memcpy(zc->speed_rating, CEX4A_SPEED_IDX,
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sizeof(CEX4A_SPEED_IDX));
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} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) {
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zc->type_string = "CEX5A";
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zc->user_space_type = ZCRYPT_CEX5;
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memcpy(zc->speed_rating, CEX5A_SPEED_IDX,
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sizeof(CEX5A_SPEED_IDX));
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} else {
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zc->type_string = "CEX6A";
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zc->user_space_type = ZCRYPT_CEX6;
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memcpy(zc->speed_rating, CEX6A_SPEED_IDX,
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sizeof(CEX6A_SPEED_IDX));
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}
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zc->min_mod_size = CEX4A_MIN_MOD_SIZE;
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if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
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ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
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zc->max_mod_size = CEX4A_MAX_MOD_SIZE_4K;
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zc->max_exp_bit_length =
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CEX4A_MAX_MOD_SIZE_4K;
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} else {
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zc->max_mod_size = CEX4A_MAX_MOD_SIZE_2K;
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zc->max_exp_bit_length =
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CEX4A_MAX_MOD_SIZE_2K;
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}
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} else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
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if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
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zc->type_string = "CEX4C";
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/* wrong user space type, must be CEX4
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* just keep it for cca compatibility
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*/
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zc->user_space_type = ZCRYPT_CEX3C;
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memcpy(zc->speed_rating, CEX4C_SPEED_IDX,
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sizeof(CEX4C_SPEED_IDX));
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} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) {
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zc->type_string = "CEX5C";
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/* wrong user space type, must be CEX5
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* just keep it for cca compatibility
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*/
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zc->user_space_type = ZCRYPT_CEX3C;
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memcpy(zc->speed_rating, CEX5C_SPEED_IDX,
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sizeof(CEX5C_SPEED_IDX));
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} else {
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zc->type_string = "CEX6C";
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/* wrong user space type, must be CEX6
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* just keep it for cca compatibility
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*/
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zc->user_space_type = ZCRYPT_CEX3C;
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memcpy(zc->speed_rating, CEX6C_SPEED_IDX,
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sizeof(CEX6C_SPEED_IDX));
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}
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zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
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zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
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zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
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} else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) {
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if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
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zc->type_string = "CEX4P";
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zc->user_space_type = ZCRYPT_CEX4;
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memcpy(zc->speed_rating, CEX4P_SPEED_IDX,
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sizeof(CEX4P_SPEED_IDX));
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} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) {
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zc->type_string = "CEX5P";
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zc->user_space_type = ZCRYPT_CEX5;
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memcpy(zc->speed_rating, CEX5P_SPEED_IDX,
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sizeof(CEX5P_SPEED_IDX));
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} else {
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zc->type_string = "CEX6P";
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zc->user_space_type = ZCRYPT_CEX6;
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memcpy(zc->speed_rating, CEX6P_SPEED_IDX,
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sizeof(CEX6P_SPEED_IDX));
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}
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zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
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zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
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zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
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} else {
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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 CEX4 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_cex4_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_cex4_card_driver = {
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.probe = zcrypt_cex4_card_probe,
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.remove = zcrypt_cex4_card_remove,
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.ids = zcrypt_cex4_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 CEX4 queue device. It always accepts the AP device
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* since the bus_match already checked the hardware type.
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* @ap_dev: pointer to the AP device.
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*/
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static int zcrypt_cex4_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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if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) {
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zq = zcrypt_queue_alloc(CEX4A_MAX_MESSAGE_SIZE);
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if (!zq)
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return -ENOMEM;
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zq->ops = zcrypt_msgtype(MSGTYPE50_NAME,
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MSGTYPE50_VARIANT_DEFAULT);
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} else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
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zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
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if (!zq)
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return -ENOMEM;
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zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
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MSGTYPE06_VARIANT_DEFAULT);
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} else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) {
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zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
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if (!zq)
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return -ENOMEM;
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zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
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MSGTYPE06_VARIANT_EP11);
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} else {
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return -ENODEV;
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}
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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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ap_queue_init_reply(aq, &zq->reply);
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aq->request_timeout = CEX4_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 CEX4 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_cex4_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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if (zq)
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zcrypt_queue_unregister(zq);
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}
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static struct ap_driver zcrypt_cex4_queue_driver = {
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.probe = zcrypt_cex4_queue_probe,
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.remove = zcrypt_cex4_queue_remove,
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.suspend = ap_queue_suspend,
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.resume = ap_queue_resume,
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.ids = zcrypt_cex4_queue_ids,
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.flags = AP_DRIVER_FLAG_DEFAULT,
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};
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int __init zcrypt_cex4_init(void)
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{
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int rc;
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rc = ap_driver_register(&zcrypt_cex4_card_driver,
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THIS_MODULE, "cex4card");
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if (rc)
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return rc;
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rc = ap_driver_register(&zcrypt_cex4_queue_driver,
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THIS_MODULE, "cex4queue");
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if (rc)
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ap_driver_unregister(&zcrypt_cex4_card_driver);
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return rc;
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}
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void __exit zcrypt_cex4_exit(void)
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{
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ap_driver_unregister(&zcrypt_cex4_queue_driver);
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ap_driver_unregister(&zcrypt_cex4_card_driver);
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}
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module_init(zcrypt_cex4_init);
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module_exit(zcrypt_cex4_exit);
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