1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright IBM Corp. 2001, 2018
4 * Author(s): Robert Burroughs
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,
69 struct zcrypt_card *zc = dev_get_drvdata(dev);
71 struct ap_card *ac = to_ap_card(dev);
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 sysfs_emit(buf, "%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,
100 struct zcrypt_queue *zq = dev_get_drvdata(dev);
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_aes_mk_state >= '1' && ci.new_aes_mk_state <= '3')
113 n = sysfs_emit(buf, "AES NEW: %s 0x%016llx\n",
114 new_state[ci.new_aes_mk_state - '1'],
117 n = sysfs_emit(buf, "AES NEW: - -\n");
119 if (ci.cur_aes_mk_state >= '1' && ci.cur_aes_mk_state <= '2')
120 n += sysfs_emit_at(buf, n, "AES CUR: %s 0x%016llx\n",
121 cao_state[ci.cur_aes_mk_state - '1'],
124 n += sysfs_emit_at(buf, n, "AES CUR: - -\n");
126 if (ci.old_aes_mk_state >= '1' && ci.old_aes_mk_state <= '2')
127 n += sysfs_emit_at(buf, n, "AES OLD: %s 0x%016llx\n",
128 cao_state[ci.old_aes_mk_state - '1'],
131 n += sysfs_emit_at(buf, n, "AES OLD: - -\n");
133 if (ci.new_apka_mk_state >= '1' && ci.new_apka_mk_state <= '3')
134 n += sysfs_emit_at(buf, n, "APKA NEW: %s 0x%016llx\n",
135 new_state[ci.new_apka_mk_state - '1'],
138 n += sysfs_emit_at(buf, n, "APKA NEW: - -\n");
140 if (ci.cur_apka_mk_state >= '1' && ci.cur_apka_mk_state <= '2')
141 n += sysfs_emit_at(buf, n, "APKA CUR: %s 0x%016llx\n",
142 cao_state[ci.cur_apka_mk_state - '1'],
145 n += sysfs_emit_at(buf, n, "APKA CUR: - -\n");
147 if (ci.old_apka_mk_state >= '1' && ci.old_apka_mk_state <= '2')
148 n += sysfs_emit_at(buf, n, "APKA OLD: %s 0x%016llx\n",
149 cao_state[ci.old_apka_mk_state - '1'],
152 n += sysfs_emit_at(buf, n, "APKA OLD: - -\n");
157 static struct device_attribute dev_attr_cca_mkvps =
158 __ATTR(mkvps, 0444, cca_mkvps_show, NULL);
160 static struct attribute *cca_queue_attrs[] = {
161 &dev_attr_cca_mkvps.attr,
165 static const struct attribute_group cca_queue_attr_grp = {
166 .attrs = cca_queue_attrs,
170 * Large random number detection function. Its sends a message to a CEX2C/CEX3C
171 * card to find out if large random numbers are supported.
172 * @ap_dev: pointer to the AP device.
174 * Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
176 static int zcrypt_cex2c_rng_supported(struct ap_queue *aq)
178 struct ap_message ap_msg;
182 struct type86_hdr hdr;
183 struct type86_fmt2_ext fmt2;
187 struct type6_hdr hdr;
189 char function_code[2];
190 short int rule_length;
192 short int verb_length;
193 short int key_length;
197 ap_init_message(&ap_msg);
198 ap_msg.msg = (void *)get_zeroed_page(GFP_KERNEL);
201 ap_msg.bufsize = PAGE_SIZE;
203 rng_type6cprb_msgx(&ap_msg, 4, &domain);
206 msg->cprbx.domain = AP_QID_QUEUE(aq->qid);
208 rc = ap_send(aq->qid, 0x0102030405060708UL, ap_msg.msg, ap_msg.len);
212 /* Wait for the test message to complete. */
213 for (i = 0; i < 2 * HZ; i++) {
215 rc = ap_recv(aq->qid, &psmid, ap_msg.msg, ap_msg.bufsize);
216 if (rc == 0 && psmid == 0x0102030405060708UL)
227 if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
232 free_page((unsigned long)ap_msg.msg);
237 * Probe function for CEX2C/CEX3C card devices. It always accepts the
238 * AP device since the bus_match already checked the hardware type.
239 * @ap_dev: pointer to the AP card device.
241 static int zcrypt_cex2c_card_probe(struct ap_device *ap_dev)
244 * Normalized speed ratings per crypto adapter
245 * MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
247 static const int CEX2C_SPEED_IDX[] = {
248 1000, 1400, 2400, 1100, 1500, 2600, 100, 12};
249 static const int CEX3C_SPEED_IDX[] = {
250 500, 700, 1400, 550, 800, 1500, 80, 10};
252 struct ap_card *ac = to_ap_card(&ap_dev->device);
253 struct zcrypt_card *zc;
256 zc = zcrypt_card_alloc();
260 dev_set_drvdata(&ap_dev->device, zc);
261 switch (ac->ap_dev.device_type) {
262 case AP_DEVICE_TYPE_CEX2C:
263 zc->user_space_type = ZCRYPT_CEX2C;
264 zc->type_string = "CEX2C";
265 zc->speed_rating = CEX2C_SPEED_IDX;
266 zc->min_mod_size = CEX2C_MIN_MOD_SIZE;
267 zc->max_mod_size = CEX2C_MAX_MOD_SIZE;
268 zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE;
270 case AP_DEVICE_TYPE_CEX3C:
271 zc->user_space_type = ZCRYPT_CEX3C;
272 zc->type_string = "CEX3C";
273 zc->speed_rating = CEX3C_SPEED_IDX;
274 zc->min_mod_size = CEX3C_MIN_MOD_SIZE;
275 zc->max_mod_size = CEX3C_MAX_MOD_SIZE;
276 zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
279 zcrypt_card_free(zc);
284 rc = zcrypt_card_register(zc);
286 zcrypt_card_free(zc);
290 if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
291 rc = sysfs_create_group(&ap_dev->device.kobj,
294 zcrypt_card_unregister(zc);
295 zcrypt_card_free(zc);
303 * This is called to remove the CEX2C/CEX3C card driver information
304 * if an AP card device is removed.
306 static void zcrypt_cex2c_card_remove(struct ap_device *ap_dev)
308 struct zcrypt_card *zc = dev_get_drvdata(&ap_dev->device);
309 struct ap_card *ac = to_ap_card(&ap_dev->device);
311 if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
312 sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp);
314 zcrypt_card_unregister(zc);
317 static struct ap_driver zcrypt_cex2c_card_driver = {
318 .probe = zcrypt_cex2c_card_probe,
319 .remove = zcrypt_cex2c_card_remove,
320 .ids = zcrypt_cex2c_card_ids,
321 .flags = AP_DRIVER_FLAG_DEFAULT,
325 * Probe function for CEX2C/CEX3C queue devices. It always accepts the
326 * AP device since the bus_match already checked the hardware type.
327 * @ap_dev: pointer to the AP card device.
329 static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev)
331 struct ap_queue *aq = to_ap_queue(&ap_dev->device);
332 struct zcrypt_queue *zq;
335 zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE);
340 atomic_set(&zq->load, 0);
342 rc = zcrypt_cex2c_rng_supported(aq);
344 zcrypt_queue_free(zq);
348 zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
349 MSGTYPE06_VARIANT_DEFAULT);
351 zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
352 MSGTYPE06_VARIANT_NORNG);
353 ap_queue_init_state(aq);
354 ap_queue_init_reply(aq, &zq->reply);
355 aq->request_timeout = CEX2C_CLEANUP_TIME;
356 dev_set_drvdata(&ap_dev->device, zq);
357 rc = zcrypt_queue_register(zq);
359 zcrypt_queue_free(zq);
363 if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
364 rc = sysfs_create_group(&ap_dev->device.kobj,
365 &cca_queue_attr_grp);
367 zcrypt_queue_unregister(zq);
368 zcrypt_queue_free(zq);
376 * This is called to remove the CEX2C/CEX3C queue driver information
377 * if an AP queue device is removed.
379 static void zcrypt_cex2c_queue_remove(struct ap_device *ap_dev)
381 struct zcrypt_queue *zq = dev_get_drvdata(&ap_dev->device);
382 struct ap_queue *aq = to_ap_queue(&ap_dev->device);
384 if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
385 sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp);
387 zcrypt_queue_unregister(zq);
390 static struct ap_driver zcrypt_cex2c_queue_driver = {
391 .probe = zcrypt_cex2c_queue_probe,
392 .remove = zcrypt_cex2c_queue_remove,
393 .ids = zcrypt_cex2c_queue_ids,
394 .flags = AP_DRIVER_FLAG_DEFAULT,
397 int __init zcrypt_cex2c_init(void)
401 rc = ap_driver_register(&zcrypt_cex2c_card_driver,
402 THIS_MODULE, "cex2card");
406 rc = ap_driver_register(&zcrypt_cex2c_queue_driver,
407 THIS_MODULE, "cex2cqueue");
409 ap_driver_unregister(&zcrypt_cex2c_card_driver);
414 void zcrypt_cex2c_exit(void)
416 ap_driver_unregister(&zcrypt_cex2c_queue_driver);
417 ap_driver_unregister(&zcrypt_cex2c_card_driver);
420 module_init(zcrypt_cex2c_init);
421 module_exit(zcrypt_cex2c_exit);