1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright IBM Corp. 2001, 2018
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
7 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
8 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
9 * Ralph Wuerthner <rwuerthn@de.ibm.com>
10 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/err.h>
16 #include <linux/delay.h>
17 #include <linux/slab.h>
18 #include <linux/atomic.h>
19 #include <linux/uaccess.h>
20 #include <linux/mod_devicetable.h>
23 #include "zcrypt_api.h"
24 #include "zcrypt_error.h"
25 #include "zcrypt_msgtype6.h"
26 #include "zcrypt_cex2c.h"
27 #include "zcrypt_cca_key.h"
28 #include "zcrypt_ccamisc.h"
30 #define CEX2C_MIN_MOD_SIZE 16 /* 128 bits */
31 #define CEX2C_MAX_MOD_SIZE 256 /* 2048 bits */
32 #define CEX3C_MIN_MOD_SIZE 16 /* 128 bits */
33 #define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */
34 #define CEX2C_MAX_XCRB_MESSAGE_SIZE (12*1024)
35 #define CEX2C_CLEANUP_TIME (15*HZ)
37 MODULE_AUTHOR("IBM Corporation");
38 MODULE_DESCRIPTION("CEX2C/CEX3C Cryptographic Coprocessor device driver, " \
39 "Copyright IBM Corp. 2001, 2018");
40 MODULE_LICENSE("GPL");
42 static struct ap_device_id zcrypt_cex2c_card_ids[] = {
43 { .dev_type = AP_DEVICE_TYPE_CEX2C,
44 .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
45 { .dev_type = AP_DEVICE_TYPE_CEX3C,
46 .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
47 { /* end of list */ },
50 MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_card_ids);
52 static struct ap_device_id zcrypt_cex2c_queue_ids[] = {
53 { .dev_type = AP_DEVICE_TYPE_CEX2C,
54 .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
55 { .dev_type = AP_DEVICE_TYPE_CEX3C,
56 .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
57 { /* end of list */ },
60 MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_queue_ids);
63 * CCA card additional device attributes
65 static ssize_t cca_serialnr_show(struct device *dev,
66 struct device_attribute *attr,
70 struct ap_card *ac = to_ap_card(dev);
71 struct zcrypt_card *zc = ac->private;
73 memset(&ci, 0, sizeof(ci));
75 if (ap_domain_index >= 0)
76 cca_get_info(ac->id, ap_domain_index, &ci, zc->online);
78 return scnprintf(buf, PAGE_SIZE, "%s\n", ci.serial);
81 static struct device_attribute dev_attr_cca_serialnr =
82 __ATTR(serialnr, 0444, cca_serialnr_show, NULL);
84 static struct attribute *cca_card_attrs[] = {
85 &dev_attr_cca_serialnr.attr,
89 static const struct attribute_group cca_card_attr_grp = {
90 .attrs = cca_card_attrs,
94 * CCA queue additional device attributes
96 static ssize_t cca_mkvps_show(struct device *dev,
97 struct device_attribute *attr,
102 struct zcrypt_queue *zq = to_ap_queue(dev)->private;
103 static const char * const cao_state[] = { "invalid", "valid" };
104 static const char * const new_state[] = { "empty", "partial", "full" };
106 memset(&ci, 0, sizeof(ci));
108 cca_get_info(AP_QID_CARD(zq->queue->qid),
109 AP_QID_QUEUE(zq->queue->qid),
112 if (ci.new_mk_state >= '1' && ci.new_mk_state <= '3')
113 n = scnprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n",
114 new_state[ci.new_mk_state - '1'], ci.new_mkvp);
116 n = scnprintf(buf, PAGE_SIZE, "AES NEW: - -\n");
118 if (ci.cur_mk_state >= '1' && ci.cur_mk_state <= '2')
119 n += scnprintf(buf + n, PAGE_SIZE - n,
120 "AES CUR: %s 0x%016llx\n",
121 cao_state[ci.cur_mk_state - '1'], ci.cur_mkvp);
123 n += scnprintf(buf + n, PAGE_SIZE - n, "AES CUR: - -\n");
125 if (ci.old_mk_state >= '1' && ci.old_mk_state <= '2')
126 n += scnprintf(buf + n, PAGE_SIZE - n,
127 "AES OLD: %s 0x%016llx\n",
128 cao_state[ci.old_mk_state - '1'], ci.old_mkvp);
130 n += scnprintf(buf + n, PAGE_SIZE - n, "AES OLD: - -\n");
135 static struct device_attribute dev_attr_cca_mkvps =
136 __ATTR(mkvps, 0444, cca_mkvps_show, NULL);
138 static struct attribute *cca_queue_attrs[] = {
139 &dev_attr_cca_mkvps.attr,
143 static const struct attribute_group cca_queue_attr_grp = {
144 .attrs = cca_queue_attrs,
148 * Large random number detection function. Its sends a message to a CEX2C/CEX3C
149 * card to find out if large random numbers are supported.
150 * @ap_dev: pointer to the AP device.
152 * Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
154 static int zcrypt_cex2c_rng_supported(struct ap_queue *aq)
156 struct ap_message ap_msg;
157 unsigned long long psmid;
160 struct type86_hdr hdr;
161 struct type86_fmt2_ext fmt2;
165 struct type6_hdr hdr;
167 char function_code[2];
168 short int rule_length;
170 short int verb_length;
171 short int key_length;
175 ap_init_message(&ap_msg);
176 ap_msg.msg = (void *) get_zeroed_page(GFP_KERNEL);
180 rng_type6CPRB_msgX(&ap_msg, 4, &domain);
183 msg->cprbx.domain = AP_QID_QUEUE(aq->qid);
185 rc = ap_send(aq->qid, 0x0102030405060708ULL, ap_msg.msg, ap_msg.len);
189 /* Wait for the test message to complete. */
190 for (i = 0; i < 2 * HZ; i++) {
192 rc = ap_recv(aq->qid, &psmid, ap_msg.msg, 4096);
193 if (rc == 0 && psmid == 0x0102030405060708ULL)
204 if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
209 free_page((unsigned long) ap_msg.msg);
214 * Probe function for CEX2C/CEX3C card devices. It always accepts the
215 * AP device since the bus_match already checked the hardware type.
216 * @ap_dev: pointer to the AP card device.
218 static int zcrypt_cex2c_card_probe(struct ap_device *ap_dev)
221 * Normalized speed ratings per crypto adapter
222 * MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
224 static const int CEX2C_SPEED_IDX[] = {
225 1000, 1400, 2400, 1100, 1500, 2600, 100, 12};
226 static const int CEX3C_SPEED_IDX[] = {
227 500, 700, 1400, 550, 800, 1500, 80, 10};
229 struct ap_card *ac = to_ap_card(&ap_dev->device);
230 struct zcrypt_card *zc;
233 zc = zcrypt_card_alloc();
238 switch (ac->ap_dev.device_type) {
239 case AP_DEVICE_TYPE_CEX2C:
240 zc->user_space_type = ZCRYPT_CEX2C;
241 zc->type_string = "CEX2C";
242 memcpy(zc->speed_rating, CEX2C_SPEED_IDX,
243 sizeof(CEX2C_SPEED_IDX));
244 zc->min_mod_size = CEX2C_MIN_MOD_SIZE;
245 zc->max_mod_size = CEX2C_MAX_MOD_SIZE;
246 zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE;
248 case AP_DEVICE_TYPE_CEX3C:
249 zc->user_space_type = ZCRYPT_CEX3C;
250 zc->type_string = "CEX3C";
251 memcpy(zc->speed_rating, CEX3C_SPEED_IDX,
252 sizeof(CEX3C_SPEED_IDX));
253 zc->min_mod_size = CEX3C_MIN_MOD_SIZE;
254 zc->max_mod_size = CEX3C_MAX_MOD_SIZE;
255 zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
258 zcrypt_card_free(zc);
263 rc = zcrypt_card_register(zc);
266 zcrypt_card_free(zc);
270 if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
271 rc = sysfs_create_group(&ap_dev->device.kobj,
274 zcrypt_card_unregister(zc);
276 zcrypt_card_free(zc);
284 * This is called to remove the CEX2C/CEX3C card driver information
285 * if an AP card device is removed.
287 static void zcrypt_cex2c_card_remove(struct ap_device *ap_dev)
289 struct ap_card *ac = to_ap_card(&ap_dev->device);
290 struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private;
292 if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
293 sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp);
295 zcrypt_card_unregister(zc);
298 static struct ap_driver zcrypt_cex2c_card_driver = {
299 .probe = zcrypt_cex2c_card_probe,
300 .remove = zcrypt_cex2c_card_remove,
301 .ids = zcrypt_cex2c_card_ids,
302 .flags = AP_DRIVER_FLAG_DEFAULT,
306 * Probe function for CEX2C/CEX3C queue devices. It always accepts the
307 * AP device since the bus_match already checked the hardware type.
308 * @ap_dev: pointer to the AP card device.
310 static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev)
312 struct ap_queue *aq = to_ap_queue(&ap_dev->device);
313 struct zcrypt_queue *zq;
316 zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE);
321 atomic_set(&zq->load, 0);
323 rc = zcrypt_cex2c_rng_supported(aq);
325 zcrypt_queue_free(zq);
329 zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
330 MSGTYPE06_VARIANT_DEFAULT);
332 zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
333 MSGTYPE06_VARIANT_NORNG);
334 ap_queue_init_state(aq);
335 ap_queue_init_reply(aq, &zq->reply);
336 aq->request_timeout = CEX2C_CLEANUP_TIME;
338 rc = zcrypt_queue_register(zq);
341 zcrypt_queue_free(zq);
345 if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
346 rc = sysfs_create_group(&ap_dev->device.kobj,
347 &cca_queue_attr_grp);
349 zcrypt_queue_unregister(zq);
351 zcrypt_queue_free(zq);
359 * This is called to remove the CEX2C/CEX3C queue driver information
360 * if an AP queue device is removed.
362 static void zcrypt_cex2c_queue_remove(struct ap_device *ap_dev)
364 struct ap_queue *aq = to_ap_queue(&ap_dev->device);
365 struct zcrypt_queue *zq = aq->private;
367 if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
368 sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp);
370 zcrypt_queue_unregister(zq);
373 static struct ap_driver zcrypt_cex2c_queue_driver = {
374 .probe = zcrypt_cex2c_queue_probe,
375 .remove = zcrypt_cex2c_queue_remove,
376 .ids = zcrypt_cex2c_queue_ids,
377 .flags = AP_DRIVER_FLAG_DEFAULT,
380 int __init zcrypt_cex2c_init(void)
384 rc = ap_driver_register(&zcrypt_cex2c_card_driver,
385 THIS_MODULE, "cex2card");
389 rc = ap_driver_register(&zcrypt_cex2c_queue_driver,
390 THIS_MODULE, "cex2cqueue");
392 ap_driver_unregister(&zcrypt_cex2c_card_driver);
397 void zcrypt_cex2c_exit(void)
399 ap_driver_unregister(&zcrypt_cex2c_queue_driver);
400 ap_driver_unregister(&zcrypt_cex2c_card_driver);
403 module_init(zcrypt_cex2c_init);
404 module_exit(zcrypt_cex2c_exit);