--- /dev/null
+/*
+ * Copyright IBM Corp. 2012
+ * Author(s): Holger Dengler <hd@linux.vnet.ibm.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/atomic.h>
+#include <linux/uaccess.h>
+
+#include "ap_bus.h"
+#include "zcrypt_api.h"
+#include "zcrypt_msgtype6.h"
+#include "zcrypt_msgtype50.h"
+#include "zcrypt_error.h"
+#include "zcrypt_cex4.h"
+
+#define CEX4A_MIN_MOD_SIZE 1 /* 8 bits */
+#define CEX4A_MAX_MOD_SIZE_2K 256 /* 2048 bits */
+#define CEX4A_MAX_MOD_SIZE_4K 512 /* 4096 bits */
+
+#define CEX4C_MIN_MOD_SIZE 16 /* 256 bits */
+#define CEX4C_MAX_MOD_SIZE 512 /* 4096 bits */
+
+#define CEX4A_SPEED_RATING 900 /* TODO new card, new speed rating */
+#define CEX4C_SPEED_RATING 6500 /* TODO new card, new speed rating */
+#define CEX4P_SPEED_RATING 7000 /* TODO new card, new speed rating */
+#define CEX5A_SPEED_RATING 450 /* TODO new card, new speed rating */
+#define CEX5C_SPEED_RATING 3250 /* TODO new card, new speed rating */
+#define CEX5P_SPEED_RATING 3500 /* TODO new card, new speed rating */
+
+#define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE
+#define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE
+
+/* Waiting time for requests to be processed.
+ * Currently there are some types of request which are not deterministic.
+ * But the maximum time limit managed by the stomper code is set to 60sec.
+ * Hence we have to wait at least that time period.
+ */
+#define CEX4_CLEANUP_TIME (61*HZ)
+
+static struct ap_device_id zcrypt_cex4_ids[] = {
+ { AP_DEVICE(AP_DEVICE_TYPE_CEX4) },
+ { AP_DEVICE(AP_DEVICE_TYPE_CEX5) },
+ { /* end of list */ },
+};
+
+MODULE_DEVICE_TABLE(ap, zcrypt_cex4_ids);
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \
+ "Copyright IBM Corp. 2012");
+MODULE_LICENSE("GPL");
+
+static int zcrypt_cex4_probe(struct ap_device *ap_dev);
+static void zcrypt_cex4_remove(struct ap_device *ap_dev);
+
+static struct ap_driver zcrypt_cex4_driver = {
+ .probe = zcrypt_cex4_probe,
+ .remove = zcrypt_cex4_remove,
+ .ids = zcrypt_cex4_ids,
+ .request_timeout = CEX4_CLEANUP_TIME,
+};
+
+/**
+ * Probe function for CEX4 cards. It always accepts the AP device
+ * since the bus_match already checked the hardware type.
+ * @ap_dev: pointer to the AP device.
+ */
+static int zcrypt_cex4_probe(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev = NULL;
+ int rc = 0;
+
+ switch (ap_dev->device_type) {
+ case AP_DEVICE_TYPE_CEX4:
+ case AP_DEVICE_TYPE_CEX5:
+ if (ap_test_bit(&ap_dev->functions, AP_FUNC_ACCEL)) {
+ zdev = zcrypt_device_alloc(CEX4A_MAX_MESSAGE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX4) {
+ zdev->type_string = "CEX4A";
+ zdev->speed_rating = CEX4A_SPEED_RATING;
+ } else {
+ zdev->type_string = "CEX5A";
+ zdev->speed_rating = CEX5A_SPEED_RATING;
+ }
+ zdev->user_space_type = ZCRYPT_CEX3A;
+ zdev->min_mod_size = CEX4A_MIN_MOD_SIZE;
+ if (ap_test_bit(&ap_dev->functions, AP_FUNC_MEX4K) &&
+ ap_test_bit(&ap_dev->functions, AP_FUNC_CRT4K)) {
+ zdev->max_mod_size =
+ CEX4A_MAX_MOD_SIZE_4K;
+ zdev->max_exp_bit_length =
+ CEX4A_MAX_MOD_SIZE_4K;
+ } else {
+ zdev->max_mod_size =
+ CEX4A_MAX_MOD_SIZE_2K;
+ zdev->max_exp_bit_length =
+ CEX4A_MAX_MOD_SIZE_2K;
+ }
+ zdev->short_crt = 1;
+ zdev->ops = zcrypt_msgtype_request(MSGTYPE50_NAME,
+ MSGTYPE50_VARIANT_DEFAULT);
+ } else if (ap_test_bit(&ap_dev->functions, AP_FUNC_COPRO)) {
+ zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX4) {
+ zdev->type_string = "CEX4C";
+ zdev->speed_rating = CEX4C_SPEED_RATING;
+ } else {
+ zdev->type_string = "CEX5C";
+ zdev->speed_rating = CEX5C_SPEED_RATING;
+ }
+ zdev->user_space_type = ZCRYPT_CEX3C;
+ zdev->min_mod_size = CEX4C_MIN_MOD_SIZE;
+ zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
+ zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
+ zdev->short_crt = 0;
+ zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
+ MSGTYPE06_VARIANT_DEFAULT);
+ } else if (ap_test_bit(&ap_dev->functions, AP_FUNC_EP11)) {
+ zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX4) {
+ zdev->type_string = "CEX4P";
+ zdev->speed_rating = CEX4P_SPEED_RATING;
+ } else {
+ zdev->type_string = "CEX5P";
+ zdev->speed_rating = CEX5P_SPEED_RATING;
+ }
+ zdev->user_space_type = ZCRYPT_CEX4;
+ zdev->min_mod_size = CEX4C_MIN_MOD_SIZE;
+ zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
+ zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
+ zdev->short_crt = 0;
+ zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
+ MSGTYPE06_VARIANT_EP11);
+ }
+ break;
+ }
+ if (!zdev)
+ return -ENODEV;
+ zdev->ap_dev = ap_dev;
+ zdev->online = 1;
+ ap_dev->reply = &zdev->reply;
+ ap_dev->private = zdev;
+ rc = zcrypt_device_register(zdev);
+ if (rc) {
+ zcrypt_msgtype_release(zdev->ops);
+ ap_dev->private = NULL;
+ zcrypt_device_free(zdev);
+ }
+ return rc;
+}
+
+/**
+ * This is called to remove the extended CEX4 driver information
+ * if an AP device is removed.
+ */
+static void zcrypt_cex4_remove(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev = ap_dev->private;
+ struct zcrypt_ops *zops;
+
+ if (zdev) {
+ zops = zdev->ops;
+ zcrypt_device_unregister(zdev);
+ zcrypt_msgtype_release(zops);
+ }
+}
+
+int __init zcrypt_cex4_init(void)
+{
+ return ap_driver_register(&zcrypt_cex4_driver, THIS_MODULE, "cex4");
+}
+
+void __exit zcrypt_cex4_exit(void)
+{
+ ap_driver_unregister(&zcrypt_cex4_driver);
+}
+
+module_init(zcrypt_cex4_init);
+module_exit(zcrypt_cex4_exit);
Code Review / kvmfornfv.git / blobdiff