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812141a9 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1e2076f4 HD |
2 | /* |
3 | * Copyright IBM Corp. 2012 | |
4 | * Author(s): Holger Dengler <hd@linux.vnet.ibm.com> | |
5 | */ | |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/err.h> | |
11 | #include <linux/atomic.h> | |
12 | #include <linux/uaccess.h> | |
e28d2af4 | 13 | #include <linux/mod_devicetable.h> |
1e2076f4 HD |
14 | |
15 | #include "ap_bus.h" | |
16 | #include "zcrypt_api.h" | |
17 | #include "zcrypt_msgtype6.h" | |
18 | #include "zcrypt_msgtype50.h" | |
19 | #include "zcrypt_error.h" | |
20 | #include "zcrypt_cex4.h" | |
21 | ||
22 | #define CEX4A_MIN_MOD_SIZE 1 /* 8 bits */ | |
23 | #define CEX4A_MAX_MOD_SIZE_2K 256 /* 2048 bits */ | |
24 | #define CEX4A_MAX_MOD_SIZE_4K 512 /* 4096 bits */ | |
25 | ||
26 | #define CEX4C_MIN_MOD_SIZE 16 /* 256 bits */ | |
27 | #define CEX4C_MAX_MOD_SIZE 512 /* 4096 bits */ | |
28 | ||
1e2076f4 HD |
29 | #define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE |
30 | #define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE | |
31 | ||
91f3e3ea IT |
32 | /* Waiting time for requests to be processed. |
33 | * Currently there are some types of request which are not deterministic. | |
34 | * But the maximum time limit managed by the stomper code is set to 60sec. | |
35 | * Hence we have to wait at least that time period. | |
36 | */ | |
c50a160c | 37 | #define CEX4_CLEANUP_TIME (900*HZ) |
1e2076f4 | 38 | |
1e2076f4 HD |
39 | MODULE_AUTHOR("IBM Corporation"); |
40 | MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \ | |
41 | "Copyright IBM Corp. 2012"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
e28d2af4 IT |
44 | static struct ap_device_id zcrypt_cex4_card_ids[] = { |
45 | { .dev_type = AP_DEVICE_TYPE_CEX4, | |
46 | .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, | |
47 | { .dev_type = AP_DEVICE_TYPE_CEX5, | |
48 | .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, | |
21214b04 HF |
49 | { .dev_type = AP_DEVICE_TYPE_CEX6, |
50 | .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, | |
e28d2af4 IT |
51 | { /* end of list */ }, |
52 | }; | |
53 | ||
54 | MODULE_DEVICE_TABLE(ap, zcrypt_cex4_card_ids); | |
1e2076f4 | 55 | |
e28d2af4 IT |
56 | static struct ap_device_id zcrypt_cex4_queue_ids[] = { |
57 | { .dev_type = AP_DEVICE_TYPE_CEX4, | |
58 | .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, | |
59 | { .dev_type = AP_DEVICE_TYPE_CEX5, | |
60 | .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, | |
21214b04 HF |
61 | { .dev_type = AP_DEVICE_TYPE_CEX6, |
62 | .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, | |
e28d2af4 | 63 | { /* end of list */ }, |
1e2076f4 HD |
64 | }; |
65 | ||
e28d2af4 IT |
66 | MODULE_DEVICE_TABLE(ap, zcrypt_cex4_queue_ids); |
67 | ||
1e2076f4 | 68 | /** |
e28d2af4 | 69 | * Probe function for CEX4 card device. It always accepts the AP device |
1e2076f4 HD |
70 | * since the bus_match already checked the hardware type. |
71 | * @ap_dev: pointer to the AP device. | |
72 | */ | |
e28d2af4 | 73 | static int zcrypt_cex4_card_probe(struct ap_device *ap_dev) |
1e2076f4 | 74 | { |
34a15167 IT |
75 | /* |
76 | * Normalized speed ratings per crypto adapter | |
77 | * MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY | |
78 | */ | |
e28d2af4 | 79 | static const int CEX4A_SPEED_IDX[] = { |
21214b04 | 80 | 14, 19, 249, 42, 228, 1458, 0, 0}; |
e28d2af4 | 81 | static const int CEX5A_SPEED_IDX[] = { |
21214b04 HF |
82 | 8, 9, 20, 18, 66, 458, 0, 0}; |
83 | static const int CEX6A_SPEED_IDX[] = { | |
84 | 6, 9, 20, 17, 65, 438, 0, 0}; | |
85 | ||
e28d2af4 | 86 | static const int CEX4C_SPEED_IDX[] = { |
21214b04 | 87 | 59, 69, 308, 83, 278, 2204, 209, 40}; |
e28d2af4 | 88 | static const int CEX5C_SPEED_IDX[] = { |
21214b04 HF |
89 | 24, 31, 50, 37, 90, 479, 27, 10}; |
90 | static const int CEX6C_SPEED_IDX[] = { | |
91 | 16, 20, 32, 27, 77, 455, 23, 9}; | |
92 | ||
e28d2af4 | 93 | static const int CEX4P_SPEED_IDX[] = { |
21214b04 | 94 | 224, 313, 3560, 359, 605, 2827, 0, 50}; |
e28d2af4 | 95 | static const int CEX5P_SPEED_IDX[] = { |
21214b04 HF |
96 | 63, 84, 156, 83, 142, 533, 0, 10}; |
97 | static const int CEX6P_SPEED_IDX[] = { | |
98 | 55, 70, 121, 73, 129, 522, 0, 9}; | |
e28d2af4 IT |
99 | |
100 | struct ap_card *ac = to_ap_card(&ap_dev->device); | |
101 | struct zcrypt_card *zc; | |
1e2076f4 HD |
102 | int rc = 0; |
103 | ||
e28d2af4 IT |
104 | zc = zcrypt_card_alloc(); |
105 | if (!zc) | |
106 | return -ENOMEM; | |
107 | zc->card = ac; | |
108 | ac->private = zc; | |
109 | if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) { | |
110 | if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) { | |
111 | zc->type_string = "CEX4A"; | |
112 | zc->user_space_type = ZCRYPT_CEX4; | |
113 | memcpy(zc->speed_rating, CEX4A_SPEED_IDX, | |
114 | sizeof(CEX4A_SPEED_IDX)); | |
21214b04 | 115 | } else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) { |
e28d2af4 IT |
116 | zc->type_string = "CEX5A"; |
117 | zc->user_space_type = ZCRYPT_CEX5; | |
118 | memcpy(zc->speed_rating, CEX5A_SPEED_IDX, | |
119 | sizeof(CEX5A_SPEED_IDX)); | |
21214b04 HF |
120 | } else { |
121 | zc->type_string = "CEX6A"; | |
122 | zc->user_space_type = ZCRYPT_CEX6; | |
123 | memcpy(zc->speed_rating, CEX6A_SPEED_IDX, | |
124 | sizeof(CEX6A_SPEED_IDX)); | |
1e2076f4 | 125 | } |
e28d2af4 IT |
126 | zc->min_mod_size = CEX4A_MIN_MOD_SIZE; |
127 | if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) && | |
128 | ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) { | |
129 | zc->max_mod_size = CEX4A_MAX_MOD_SIZE_4K; | |
130 | zc->max_exp_bit_length = | |
131 | CEX4A_MAX_MOD_SIZE_4K; | |
132 | } else { | |
133 | zc->max_mod_size = CEX4A_MAX_MOD_SIZE_2K; | |
134 | zc->max_exp_bit_length = | |
135 | CEX4A_MAX_MOD_SIZE_2K; | |
136 | } | |
137 | } else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) { | |
138 | if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) { | |
139 | zc->type_string = "CEX4C"; | |
140 | /* wrong user space type, must be CEX4 | |
141 | * just keep it for cca compatibility | |
142 | */ | |
143 | zc->user_space_type = ZCRYPT_CEX3C; | |
144 | memcpy(zc->speed_rating, CEX4C_SPEED_IDX, | |
145 | sizeof(CEX4C_SPEED_IDX)); | |
21214b04 | 146 | } else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) { |
e28d2af4 IT |
147 | zc->type_string = "CEX5C"; |
148 | /* wrong user space type, must be CEX5 | |
149 | * just keep it for cca compatibility | |
150 | */ | |
151 | zc->user_space_type = ZCRYPT_CEX3C; | |
152 | memcpy(zc->speed_rating, CEX5C_SPEED_IDX, | |
153 | sizeof(CEX5C_SPEED_IDX)); | |
21214b04 HF |
154 | } else { |
155 | zc->type_string = "CEX6C"; | |
156 | /* wrong user space type, must be CEX6 | |
157 | * just keep it for cca compatibility | |
158 | */ | |
159 | zc->user_space_type = ZCRYPT_CEX3C; | |
160 | memcpy(zc->speed_rating, CEX6C_SPEED_IDX, | |
161 | sizeof(CEX6C_SPEED_IDX)); | |
e28d2af4 IT |
162 | } |
163 | zc->min_mod_size = CEX4C_MIN_MOD_SIZE; | |
164 | zc->max_mod_size = CEX4C_MAX_MOD_SIZE; | |
165 | zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE; | |
166 | } else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) { | |
167 | if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) { | |
168 | zc->type_string = "CEX4P"; | |
169 | zc->user_space_type = ZCRYPT_CEX4; | |
170 | memcpy(zc->speed_rating, CEX4P_SPEED_IDX, | |
171 | sizeof(CEX4P_SPEED_IDX)); | |
21214b04 | 172 | } else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) { |
e28d2af4 IT |
173 | zc->type_string = "CEX5P"; |
174 | zc->user_space_type = ZCRYPT_CEX5; | |
175 | memcpy(zc->speed_rating, CEX5P_SPEED_IDX, | |
176 | sizeof(CEX5P_SPEED_IDX)); | |
21214b04 HF |
177 | } else { |
178 | zc->type_string = "CEX6P"; | |
179 | zc->user_space_type = ZCRYPT_CEX6; | |
180 | memcpy(zc->speed_rating, CEX6P_SPEED_IDX, | |
181 | sizeof(CEX6P_SPEED_IDX)); | |
e28d2af4 IT |
182 | } |
183 | zc->min_mod_size = CEX4C_MIN_MOD_SIZE; | |
184 | zc->max_mod_size = CEX4C_MAX_MOD_SIZE; | |
185 | zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE; | |
186 | } else { | |
187 | zcrypt_card_free(zc); | |
1e2076f4 | 188 | return -ENODEV; |
e28d2af4 IT |
189 | } |
190 | zc->online = 1; | |
191 | ||
192 | rc = zcrypt_card_register(zc); | |
1e2076f4 | 193 | if (rc) { |
e28d2af4 IT |
194 | ac->private = NULL; |
195 | zcrypt_card_free(zc); | |
1e2076f4 | 196 | } |
e28d2af4 | 197 | |
1e2076f4 HD |
198 | return rc; |
199 | } | |
200 | ||
201 | /** | |
e28d2af4 IT |
202 | * This is called to remove the CEX4 card driver information |
203 | * if an AP card device is removed. | |
1e2076f4 | 204 | */ |
e28d2af4 | 205 | static void zcrypt_cex4_card_remove(struct ap_device *ap_dev) |
1e2076f4 | 206 | { |
e28d2af4 | 207 | struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private; |
1e2076f4 | 208 | |
e28d2af4 IT |
209 | if (zc) |
210 | zcrypt_card_unregister(zc); | |
211 | } | |
212 | ||
213 | static struct ap_driver zcrypt_cex4_card_driver = { | |
214 | .probe = zcrypt_cex4_card_probe, | |
215 | .remove = zcrypt_cex4_card_remove, | |
216 | .ids = zcrypt_cex4_card_ids, | |
217 | }; | |
218 | ||
219 | /** | |
220 | * Probe function for CEX4 queue device. It always accepts the AP device | |
221 | * since the bus_match already checked the hardware type. | |
222 | * @ap_dev: pointer to the AP device. | |
223 | */ | |
224 | static int zcrypt_cex4_queue_probe(struct ap_device *ap_dev) | |
225 | { | |
226 | struct ap_queue *aq = to_ap_queue(&ap_dev->device); | |
227 | struct zcrypt_queue *zq; | |
228 | int rc; | |
229 | ||
230 | if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) { | |
231 | zq = zcrypt_queue_alloc(CEX4A_MAX_MESSAGE_SIZE); | |
232 | if (!zq) | |
233 | return -ENOMEM; | |
234 | zq->ops = zcrypt_msgtype(MSGTYPE50_NAME, | |
235 | MSGTYPE50_VARIANT_DEFAULT); | |
236 | } else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) { | |
237 | zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE); | |
238 | if (!zq) | |
239 | return -ENOMEM; | |
240 | zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, | |
241 | MSGTYPE06_VARIANT_DEFAULT); | |
242 | } else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) { | |
243 | zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE); | |
244 | if (!zq) | |
245 | return -ENOMEM; | |
246 | zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, | |
247 | MSGTYPE06_VARIANT_EP11); | |
248 | } else { | |
249 | return -ENODEV; | |
1e2076f4 | 250 | } |
e28d2af4 IT |
251 | zq->queue = aq; |
252 | zq->online = 1; | |
253 | atomic_set(&zq->load, 0); | |
254 | ap_queue_init_reply(aq, &zq->reply); | |
255 | aq->request_timeout = CEX4_CLEANUP_TIME, | |
256 | aq->private = zq; | |
257 | rc = zcrypt_queue_register(zq); | |
258 | if (rc) { | |
259 | aq->private = NULL; | |
260 | zcrypt_queue_free(zq); | |
261 | } | |
262 | ||
263 | return rc; | |
1e2076f4 HD |
264 | } |
265 | ||
e28d2af4 IT |
266 | /** |
267 | * This is called to remove the CEX4 queue driver information | |
268 | * if an AP queue device is removed. | |
269 | */ | |
270 | static void zcrypt_cex4_queue_remove(struct ap_device *ap_dev) | |
271 | { | |
272 | struct ap_queue *aq = to_ap_queue(&ap_dev->device); | |
273 | struct zcrypt_queue *zq = aq->private; | |
274 | ||
275 | ap_queue_remove(aq); | |
276 | if (zq) | |
277 | zcrypt_queue_unregister(zq); | |
278 | } | |
279 | ||
280 | static struct ap_driver zcrypt_cex4_queue_driver = { | |
281 | .probe = zcrypt_cex4_queue_probe, | |
282 | .remove = zcrypt_cex4_queue_remove, | |
283 | .suspend = ap_queue_suspend, | |
284 | .resume = ap_queue_resume, | |
285 | .ids = zcrypt_cex4_queue_ids, | |
286 | }; | |
287 | ||
1e2076f4 HD |
288 | int __init zcrypt_cex4_init(void) |
289 | { | |
e28d2af4 IT |
290 | int rc; |
291 | ||
292 | rc = ap_driver_register(&zcrypt_cex4_card_driver, | |
293 | THIS_MODULE, "cex4card"); | |
294 | if (rc) | |
295 | return rc; | |
296 | ||
297 | rc = ap_driver_register(&zcrypt_cex4_queue_driver, | |
298 | THIS_MODULE, "cex4queue"); | |
299 | if (rc) | |
300 | ap_driver_unregister(&zcrypt_cex4_card_driver); | |
301 | ||
302 | return rc; | |
1e2076f4 HD |
303 | } |
304 | ||
305 | void __exit zcrypt_cex4_exit(void) | |
306 | { | |
e28d2af4 IT |
307 | ap_driver_unregister(&zcrypt_cex4_queue_driver); |
308 | ap_driver_unregister(&zcrypt_cex4_card_driver); | |
1e2076f4 HD |
309 | } |
310 | ||
311 | module_init(zcrypt_cex4_init); | |
312 | module_exit(zcrypt_cex4_exit); |