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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright IBM Corp. 2012, 2019
* 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"
#include "zcrypt_ccamisc.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/CEX5/CEX6/CEX7 Cryptographic Card device driver, " \
"Copyright IBM Corp. 2019");
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 },
{ .dev_type = AP_DEVICE_TYPE_CEX6,
.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX7,
.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 },
{ .dev_type = AP_DEVICE_TYPE_CEX6,
.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX7,
.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(ap, zcrypt_cex4_queue_ids);
/*
* CCA card addditional device attributes
*/
static ssize_t serialnr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct cca_info ci;
struct ap_card *ac = to_ap_card(dev);
struct zcrypt_card *zc = ac->private;
memset(&ci, 0, sizeof(ci));
if (ap_domain_index >= 0)
cca_get_info(ac->id, ap_domain_index, &ci, zc->online);
return snprintf(buf, PAGE_SIZE, "%s\n", ci.serial);
}
static DEVICE_ATTR_RO(serialnr);
static struct attribute *cca_card_attrs[] = {
&dev_attr_serialnr.attr,
NULL,
};
static const struct attribute_group cca_card_attr_group = {
.attrs = cca_card_attrs,
};
/*
* CCA queue addditional device attributes
*/
static ssize_t mkvps_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int n = 0;
struct cca_info ci;
struct zcrypt_queue *zq = to_ap_queue(dev)->private;
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_mk_state >= '1' && ci.new_mk_state <= '3')
n = snprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n",
new_state[ci.new_mk_state - '1'], ci.new_mkvp);
else
n = snprintf(buf, PAGE_SIZE, "AES NEW: - -\n");
if (ci.cur_mk_state >= '1' && ci.cur_mk_state <= '2')
n += snprintf(buf + n, PAGE_SIZE - n, "AES CUR: %s 0x%016llx\n",
cao_state[ci.cur_mk_state - '1'], ci.cur_mkvp);
else
n += snprintf(buf + n, PAGE_SIZE - n, "AES CUR: - -\n");
if (ci.old_mk_state >= '1' && ci.old_mk_state <= '2')
n += snprintf(buf + n, PAGE_SIZE - n, "AES OLD: %s 0x%016llx\n",
cao_state[ci.old_mk_state - '1'], ci.old_mkvp);
else
n += snprintf(buf + n, PAGE_SIZE - n, "AES OLD: - -\n");
return n;
}
static DEVICE_ATTR_RO(mkvps);
static struct attribute *cca_queue_attrs[] = {
&dev_attr_mkvps.attr,
NULL,
};
static const struct attribute_group cca_queue_attr_group = {
.attrs = cca_queue_attrs,
};
/**
* Probe function for CEX4/CEX5/CEX6/CEX7 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[] = {
14, 19, 249, 42, 228, 1458, 0, 0};
static const int CEX5A_SPEED_IDX[] = {
8, 9, 20, 18, 66, 458, 0, 0};
static const int CEX6A_SPEED_IDX[] = {
6, 9, 20, 17, 65, 438, 0, 0};
static const int CEX7A_SPEED_IDX[] = {
6, 8, 17, 15, 54, 362, 0, 0};
static const int CEX4C_SPEED_IDX[] = {
59, 69, 308, 83, 278, 2204, 209, 40};
static const int CEX5C_SPEED_IDX[] = {
24, 31, 50, 37, 90, 479, 27, 10};
static const int CEX6C_SPEED_IDX[] = {
16, 20, 32, 27, 77, 455, 24, 9};
static const int CEX7C_SPEED_IDX[] = {
14, 16, 26, 23, 64, 376, 23, 8};
static const int CEX4P_SPEED_IDX[] = {
0, 0, 0, 0, 0, 0, 0, 50};
static const int CEX5P_SPEED_IDX[] = {
0, 0, 0, 0, 0, 0, 0, 10};
static const int CEX6P_SPEED_IDX[] = {
0, 0, 0, 0, 0, 0, 0, 9};
static const int CEX7P_SPEED_IDX[] = {
0, 0, 0, 0, 0, 0, 0, 8};
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_str
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