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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>
21
22#include "ap_bus.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"
29
30#define CEX2C_MIN_MOD_SIZE 16
31#define CEX2C_MAX_MOD_SIZE 256
32#define CEX3C_MIN_MOD_SIZE 16
33#define CEX3C_MAX_MOD_SIZE 512
34#define CEX2C_MAX_XCRB_MESSAGE_SIZE (12*1024)
35#define CEX2C_CLEANUP_TIME (15*HZ)
36
37MODULE_AUTHOR("IBM Corporation");
38MODULE_DESCRIPTION("CEX2C/CEX3C Cryptographic Coprocessor device driver, " \
39 "Copyright IBM Corp. 2001, 2018");
40MODULE_LICENSE("GPL");
41
42static 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 { },
48};
49
50MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_card_ids);
51
52static 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 { },
58};
59
60MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_queue_ids);
61
62
63
64
65static ssize_t cca_serialnr_show(struct device *dev,
66 struct device_attribute *attr,
67 char *buf)
68{
69 struct zcrypt_card *zc = dev_get_drvdata(dev);
70 struct cca_info ci;
71 struct ap_card *ac = to_ap_card(dev);
72
73 memset(&ci, 0, sizeof(ci));
74
75 if (ap_domain_index >= 0)
76 cca_get_info(ac->id, ap_domain_index, &ci, zc->online);
77
78 return scnprintf(buf, PAGE_SIZE, "%s\n", ci.serial);
79}
80
81static struct device_attribute dev_attr_cca_serialnr =
82 __ATTR(serialnr, 0444, cca_serialnr_show, NULL);
83
84static struct attribute *cca_card_attrs[] = {
85 &dev_attr_cca_serialnr.attr,
86 NULL,
87};
88
89static const struct attribute_group cca_card_attr_grp = {
90 .attrs = cca_card_attrs,
91};
92
93
94
95
96static ssize_t cca_mkvps_show(struct device *dev,
97 struct device_attribute *attr,
98 char *buf)
99{
100 struct zcrypt_queue *zq = dev_get_drvdata(dev);
101 int n = 0;
102 struct cca_info ci;
103 static const char * const cao_state[] = { "invalid", "valid" };
104 static const char * const new_state[] = { "empty", "partial", "full" };
105
106 memset(&ci, 0, sizeof(ci));
107
108 cca_get_info(AP_QID_CARD(zq->queue->qid),
109 AP_QID_QUEUE(zq->queue->qid),
110 &ci, zq->online);
111
112 if (ci.new_aes_mk_state >= '1' && ci.new_aes_mk_state <= '3')
113 n = scnprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n",
114 new_state[ci.new_aes_mk_state - '1'],
115 ci.new_aes_mkvp);
116 else
117 n = scnprintf(buf, PAGE_SIZE, "AES NEW: - -\n");
118
119 if (ci.cur_aes_mk_state >= '1' && ci.cur_aes_mk_state <= '2')
120 n += scnprintf(buf + n, PAGE_SIZE - n,
121 "AES CUR: %s 0x%016llx\n",
122 cao_state[ci.cur_aes_mk_state - '1'],
123 ci.cur_aes_mkvp);
124 else
125 n += scnprintf(buf + n, PAGE_SIZE - n, "AES CUR: - -\n");
126
127 if (ci.old_aes_mk_state >= '1' && ci.old_aes_mk_state <= '2')
128 n += scnprintf(buf + n, PAGE_SIZE - n,
129 "AES OLD: %s 0x%016llx\n",
130 cao_state[ci.old_aes_mk_state - '1'],
131 ci.old_aes_mkvp);
132 else
133 n += scnprintf(buf + n, PAGE_SIZE - n, "AES OLD: - -\n");
134
135 if (ci.new_apka_mk_state >= '1' && ci.new_apka_mk_state <= '3')
136 n += scnprintf(buf + n, PAGE_SIZE - n,
137 "APKA NEW: %s 0x%016llx\n",
138 new_state[ci.new_apka_mk_state - '1'],
139 ci.new_apka_mkvp);
140 else
141 n += scnprintf(buf + n, PAGE_SIZE - n, "APKA NEW: - -\n");
142
143 if (ci.cur_apka_mk_state >= '1' && ci.cur_apka_mk_state <= '2')
144 n += scnprintf(buf + n, PAGE_SIZE - n,
145 "APKA CUR: %s 0x%016llx\n",
146 cao_state[ci.cur_apka_mk_state - '1'],
147 ci.cur_apka_mkvp);
148 else
149 n += scnprintf(buf + n, PAGE_SIZE - n, "APKA CUR: - -\n");
150
151 if (ci.old_apka_mk_state >= '1' && ci.old_apka_mk_state <= '2')
152 n += scnprintf(buf + n, PAGE_SIZE - n,
153 "APKA OLD: %s 0x%016llx\n",
154 cao_state[ci.old_apka_mk_state - '1'],
155 ci.old_apka_mkvp);
156 else
157 n += scnprintf(buf + n, PAGE_SIZE - n, "APKA OLD: - -\n");
158
159 return n;
160}
161
162static struct device_attribute dev_attr_cca_mkvps =
163 __ATTR(mkvps, 0444, cca_mkvps_show, NULL);
164
165static struct attribute *cca_queue_attrs[] = {
166 &dev_attr_cca_mkvps.attr,
167 NULL,
168};
169
170static const struct attribute_group cca_queue_attr_grp = {
171 .attrs = cca_queue_attrs,
172};
173
174
175
176
177
178
179
180
181static int zcrypt_cex2c_rng_supported(struct ap_queue *aq)
182{
183 struct ap_message ap_msg;
184 unsigned long long psmid;
185 unsigned int domain;
186 struct {
187 struct type86_hdr hdr;
188 struct type86_fmt2_ext fmt2;
189 struct CPRBX cprbx;
190 } __packed *reply;
191 struct {
192 struct type6_hdr hdr;
193 struct CPRBX cprbx;
194 char function_code[2];
195 short int rule_length;
196 char rule[8];
197 short int verb_length;
198 short int key_length;
199 } __packed *msg;
200 int rc, i;
201
202 ap_init_message(&ap_msg);
203 ap_msg.msg = (void *) get_zeroed_page(GFP_KERNEL);
204 if (!ap_msg.msg)
205 return -ENOMEM;
206
207 rng_type6CPRB_msgX(&ap_msg, 4, &domain);
208
209 msg = ap_msg.msg;
210 msg->cprbx.domain = AP_QID_QUEUE(aq->qid);
211
212 rc = ap_send(aq->qid, 0x0102030405060708ULL, ap_msg.msg, ap_msg.len);
213 if (rc)
214 goto out_free;
215
216
217 for (i = 0; i < 2 * HZ; i++) {
218 msleep(1000 / HZ);
219 rc = ap_recv(aq->qid, &psmid, ap_msg.msg, 4096);
220 if (rc == 0 && psmid == 0x0102030405060708ULL)
221 break;
222 }
223
224 if (i >= 2 * HZ) {
225
226 rc = -ENODEV;
227 goto out_free;
228 }
229
230 reply = ap_msg.msg;
231 if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
232 rc = 1;
233 else
234 rc = 0;
235out_free:
236 free_page((unsigned long) ap_msg.msg);
237 return rc;
238}
239
240
241
242
243
244
245static int zcrypt_cex2c_card_probe(struct ap_device *ap_dev)
246{
247
248
249
250
251 static const int CEX2C_SPEED_IDX[] = {
252 1000, 1400, 2400, 1100, 1500, 2600, 100, 12};
253 static const int CEX3C_SPEED_IDX[] = {
254 500, 700, 1400, 550, 800, 1500, 80, 10};
255
256 struct ap_card *ac = to_ap_card(&ap_dev->device);
257 struct zcrypt_card *zc;
258 int rc = 0;
259
260 zc = zcrypt_card_alloc();
261 if (!zc)
262 return -ENOMEM;
263 zc->card = ac;
264 dev_set_drvdata(&ap_dev->device, zc);
265 switch (ac->ap_dev.device_type) {
266 case AP_DEVICE_TYPE_CEX2C:
267 zc->user_space_type = ZCRYPT_CEX2C;
268 zc->type_string = "CEX2C";
269 zc->speed_rating = CEX2C_SPEED_IDX;
270 zc->min_mod_size = CEX2C_MIN_MOD_SIZE;
271 zc->max_mod_size = CEX2C_MAX_MOD_SIZE;
272 zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE;
273 break;
274 case AP_DEVICE_TYPE_CEX3C:
275 zc->user_space_type = ZCRYPT_CEX3C;
276 zc->type_string = "CEX3C";
277 zc->speed_rating = CEX3C_SPEED_IDX;
278 zc->min_mod_size = CEX3C_MIN_MOD_SIZE;
279 zc->max_mod_size = CEX3C_MAX_MOD_SIZE;
280 zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
281 break;
282 default:
283 zcrypt_card_free(zc);
284 return -ENODEV;
285 }
286 zc->online = 1;
287
288 rc = zcrypt_card_register(zc);
289 if (rc) {
290 zcrypt_card_free(zc);
291 return rc;
292 }
293
294 if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
295 rc = sysfs_create_group(&ap_dev->device.kobj,
296 &cca_card_attr_grp);
297 if (rc) {
298 zcrypt_card_unregister(zc);
299 zcrypt_card_free(zc);
300 }
301 }
302
303 return rc;
304}
305
306
307
308
309
310static void zcrypt_cex2c_card_remove(struct ap_device *ap_dev)
311{
312 struct zcrypt_card *zc = dev_get_drvdata(&ap_dev->device);
313 struct ap_card *ac = to_ap_card(&ap_dev->device);
314
315 if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
316 sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp);
317
318 zcrypt_card_unregister(zc);
319}
320
321static struct ap_driver zcrypt_cex2c_card_driver = {
322 .probe = zcrypt_cex2c_card_probe,
323 .remove = zcrypt_cex2c_card_remove,
324 .ids = zcrypt_cex2c_card_ids,
325 .flags = AP_DRIVER_FLAG_DEFAULT,
326};
327
328
329
330
331
332
333static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev)
334{
335 struct ap_queue *aq = to_ap_queue(&ap_dev->device);
336 struct zcrypt_queue *zq;
337 int rc;
338
339 zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE);
340 if (!zq)
341 return -ENOMEM;
342 zq->queue = aq;
343 zq->online = 1;
344 atomic_set(&zq->load, 0);
345 ap_rapq(aq->qid);
346 rc = zcrypt_cex2c_rng_supported(aq);
347 if (rc < 0) {
348 zcrypt_queue_free(zq);
349 return rc;
350 }
351 if (rc)
352 zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
353 MSGTYPE06_VARIANT_DEFAULT);
354 else
355 zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
356 MSGTYPE06_VARIANT_NORNG);
357 ap_queue_init_state(aq);
358 ap_queue_init_reply(aq, &zq->reply);
359 aq->request_timeout = CEX2C_CLEANUP_TIME;
360 dev_set_drvdata(&ap_dev->device, zq);
361 rc = zcrypt_queue_register(zq);
362 if (rc) {
363 zcrypt_queue_free(zq);
364 return rc;
365 }
366
367 if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
368 rc = sysfs_create_group(&ap_dev->device.kobj,
369 &cca_queue_attr_grp);
370 if (rc) {
371 zcrypt_queue_unregister(zq);
372 zcrypt_queue_free(zq);
373 }
374 }
375
376 return rc;
377}
378
379
380
381
382
383static void zcrypt_cex2c_queue_remove(struct ap_device *ap_dev)
384{
385 struct zcrypt_queue *zq = dev_get_drvdata(&ap_dev->device);
386 struct ap_queue *aq = to_ap_queue(&ap_dev->device);
387
388 if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
389 sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp);
390
391 zcrypt_queue_unregister(zq);
392}
393
394static struct ap_driver zcrypt_cex2c_queue_driver = {
395 .probe = zcrypt_cex2c_queue_probe,
396 .remove = zcrypt_cex2c_queue_remove,
397 .ids = zcrypt_cex2c_queue_ids,
398 .flags = AP_DRIVER_FLAG_DEFAULT,
399};
400
401int __init zcrypt_cex2c_init(void)
402{
403 int rc;
404
405 rc = ap_driver_register(&zcrypt_cex2c_card_driver,
406 THIS_MODULE, "cex2card");
407 if (rc)
408 return rc;
409
410 rc = ap_driver_register(&zcrypt_cex2c_queue_driver,
411 THIS_MODULE, "cex2cqueue");
412 if (rc)
413 ap_driver_unregister(&zcrypt_cex2c_card_driver);
414
415 return rc;
416}
417
418void zcrypt_cex2c_exit(void)
419{
420 ap_driver_unregister(&zcrypt_cex2c_queue_driver);
421 ap_driver_unregister(&zcrypt_cex2c_card_driver);
422}
423
424module_init(zcrypt_cex2c_init);
425module_exit(zcrypt_cex2c_exit);
426
