2 * Copyright IBM Corp. 2012
3 * Author(s): Holger Dengler <hd@linux.vnet.ibm.com>
6 #include <linux/module.h>
7 #include <linux/slab.h>
8 #include <linux/init.h>
10 #include <linux/atomic.h>
11 #include <linux/uaccess.h>
14 #include "zcrypt_api.h"
15 #include "zcrypt_msgtype6.h"
16 #include "zcrypt_msgtype50.h"
17 #include "zcrypt_error.h"
18 #include "zcrypt_cex4.h"
20 #define CEX4A_MIN_MOD_SIZE 1 /* 8 bits */
21 #define CEX4A_MAX_MOD_SIZE_2K 256 /* 2048 bits */
22 #define CEX4A_MAX_MOD_SIZE_4K 512 /* 4096 bits */
24 #define CEX4C_MIN_MOD_SIZE 16 /* 256 bits */
25 #define CEX4C_MAX_MOD_SIZE 512 /* 4096 bits */
27 #define CEX4A_SPEED_RATING 900 /* TODO new card, new speed rating */
28 #define CEX4C_SPEED_RATING 6500 /* TODO new card, new speed rating */
30 #define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE
31 #define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE
33 #define CEX4_CLEANUP_TIME (15*HZ)
35 static struct ap_device_id zcrypt_cex4_ids[] = {
36 { AP_DEVICE(AP_DEVICE_TYPE_CEX4) },
37 { /* end of list */ },
40 MODULE_DEVICE_TABLE(ap, zcrypt_cex4_ids);
41 MODULE_AUTHOR("IBM Corporation");
42 MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \
43 "Copyright IBM Corp. 2012");
44 MODULE_LICENSE("GPL");
46 static int zcrypt_cex4_probe(struct ap_device *ap_dev);
47 static void zcrypt_cex4_remove(struct ap_device *ap_dev);
49 static struct ap_driver zcrypt_cex4_driver = {
50 .probe = zcrypt_cex4_probe,
51 .remove = zcrypt_cex4_remove,
52 .ids = zcrypt_cex4_ids,
53 .request_timeout = CEX4_CLEANUP_TIME,
57 * Probe function for CEX4 cards. It always accepts the AP device
58 * since the bus_match already checked the hardware type.
59 * @ap_dev: pointer to the AP device.
61 static int zcrypt_cex4_probe(struct ap_device *ap_dev)
63 struct zcrypt_device *zdev = NULL;
66 switch (ap_dev->device_type) {
67 case AP_DEVICE_TYPE_CEX4:
68 if (ap_test_bit(&ap_dev->functions, AP_FUNC_ACCEL)) {
69 zdev = zcrypt_device_alloc(CEX4A_MAX_MESSAGE_SIZE);
72 zdev->type_string = "CEX4A";
73 zdev->user_space_type = ZCRYPT_CEX3A;
74 zdev->min_mod_size = CEX4A_MIN_MOD_SIZE;
75 if (ap_test_bit(&ap_dev->functions, AP_FUNC_MEX4K) &&
76 ap_test_bit(&ap_dev->functions, AP_FUNC_CRT4K)) {
78 CEX4A_MAX_MOD_SIZE_4K;
79 zdev->max_exp_bit_length =
80 CEX4A_MAX_MOD_SIZE_4K;
83 CEX4A_MAX_MOD_SIZE_2K;
84 zdev->max_exp_bit_length =
85 CEX4A_MAX_MOD_SIZE_2K;
88 zdev->speed_rating = CEX4A_SPEED_RATING;
89 zdev->ops = zcrypt_msgtype_request(MSGTYPE50_NAME,
90 MSGTYPE50_VARIANT_DEFAULT);
91 } else if (ap_test_bit(&ap_dev->functions, AP_FUNC_COPRO)) {
92 zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
95 zdev->type_string = "CEX4C";
96 zdev->user_space_type = ZCRYPT_CEX3C;
97 zdev->min_mod_size = CEX4C_MIN_MOD_SIZE;
98 zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
99 zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
101 zdev->speed_rating = CEX4C_SPEED_RATING;
102 zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
103 MSGTYPE06_VARIANT_DEFAULT);
109 zdev->ap_dev = ap_dev;
111 ap_dev->reply = &zdev->reply;
112 ap_dev->private = zdev;
113 rc = zcrypt_device_register(zdev);
115 zcrypt_msgtype_release(zdev->ops);
116 ap_dev->private = NULL;
117 zcrypt_device_free(zdev);
123 * This is called to remove the extended CEX4 driver information
124 * if an AP device is removed.
126 static void zcrypt_cex4_remove(struct ap_device *ap_dev)
128 struct zcrypt_device *zdev = ap_dev->private;
129 struct zcrypt_ops *zops;
133 zcrypt_device_unregister(zdev);
134 zcrypt_msgtype_release(zops);
138 int __init zcrypt_cex4_init(void)
140 return ap_driver_register(&zcrypt_cex4_driver, THIS_MODULE, "cex4");
143 void __exit zcrypt_cex4_exit(void)
145 ap_driver_unregister(&zcrypt_cex4_driver);
148 module_init(zcrypt_cex4_init);
149 module_exit(zcrypt_cex4_exit);