[S390] zcrypt PCICC, PCIXCC coprocessor card ap bus drivers.
Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/crypto/zcrypt_pcicc.c b/drivers/s390/crypto/zcrypt_pcicc.c
new file mode 100644
index 0000000..9003629
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_pcicc.c
@@ -0,0 +1,630 @@
+/*
+ * linux/drivers/s390/crypto/zcrypt_pcicc.c
+ *
+ * zcrypt 2.0.0
+ *
+ * Copyright (C) 2001, 2006 IBM Corporation
+ * Author(s): Robert Burroughs
+ * Eric Rossman (edrossma@us.ibm.com)
+ *
+ * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Ralph Wuerthner <rwuerthn@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <asm/atomic.h>
+#include <asm/uaccess.h>
+
+#include "ap_bus.h"
+#include "zcrypt_api.h"
+#include "zcrypt_error.h"
+#include "zcrypt_pcicc.h"
+#include "zcrypt_cca_key.h"
+
+#define PCICC_MIN_MOD_SIZE 64 /* 512 bits */
+#define PCICC_MAX_MOD_SIZE_OLD 128 /* 1024 bits */
+#define PCICC_MAX_MOD_SIZE 256 /* 2048 bits */
+
+/**
+ * PCICC cards need a speed rating of 0. This keeps them at the end of
+ * the zcrypt device list (see zcrypt_api.c). PCICC cards are only
+ * used if no other cards are present because they are slow and can only
+ * cope with PKCS12 padded requests. The logic is queer. PKCS11 padded
+ * requests are rejected. The modexpo function encrypts PKCS12 padded data
+ * and decrypts any non-PKCS12 padded data (except PKCS11) in the assumption
+ * that it's encrypted PKCS12 data. The modexpo_crt function always decrypts
+ * the data in the assumption that its PKCS12 encrypted data.
+ */
+#define PCICC_SPEED_RATING 0
+
+#define PCICC_MAX_MESSAGE_SIZE 0x710 /* max size type6 v1 crt message */
+#define PCICC_MAX_RESPONSE_SIZE 0x710 /* max size type86 v1 reply */
+
+#define PCICC_CLEANUP_TIME (15*HZ)
+
+static struct ap_device_id zcrypt_pcicc_ids[] = {
+ { AP_DEVICE(AP_DEVICE_TYPE_PCICC) },
+ { /* end of list */ },
+};
+
+#ifndef CONFIG_ZCRYPT_MONOLITHIC
+MODULE_DEVICE_TABLE(ap, zcrypt_pcicc_ids);
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("PCICC Cryptographic Coprocessor device driver, "
+ "Copyright 2001, 2006 IBM Corporation");
+MODULE_LICENSE("GPL");
+#endif
+
+static int zcrypt_pcicc_probe(struct ap_device *ap_dev);
+static void zcrypt_pcicc_remove(struct ap_device *ap_dev);
+static void zcrypt_pcicc_receive(struct ap_device *, struct ap_message *,
+ struct ap_message *);
+
+static struct ap_driver zcrypt_pcicc_driver = {
+ .probe = zcrypt_pcicc_probe,
+ .remove = zcrypt_pcicc_remove,
+ .receive = zcrypt_pcicc_receive,
+ .ids = zcrypt_pcicc_ids,
+};
+
+/**
+ * The following is used to initialize the CPRB passed to the PCICC card
+ * in a type6 message. The 3 fields that must be filled in at execution
+ * time are req_parml, rpl_parml and usage_domain. Note that all three
+ * fields are *little*-endian. Actually, everything about this interface
+ * is ascii/little-endian, since the device has 'Intel inside'.
+ *
+ * The CPRB is followed immediately by the parm block.
+ * The parm block contains:
+ * - function code ('PD' 0x5044 or 'PK' 0x504B)
+ * - rule block (0x0A00 'PKCS-1.2' or 0x0A00 'ZERO-PAD')
+ * - VUD block
+ */
+static struct CPRB static_cprb = {
+ .cprb_len = __constant_cpu_to_le16(0x0070),
+ .cprb_ver_id = 0x41,
+ .func_id = {0x54,0x32},
+ .checkpoint_flag= 0x01,
+ .svr_namel = __constant_cpu_to_le16(0x0008),
+ .svr_name = {'I','C','S','F',' ',' ',' ',' '}
+};
+
+/**
+ * Check the message for PKCS11 padding.
+ */
+static inline int is_PKCS11_padded(unsigned char *buffer, int length)
+{
+ int i;
+ if ((buffer[0] != 0x00) || (buffer[1] != 0x01))
+ return 0;
+ for (i = 2; i < length; i++)
+ if (buffer[i] != 0xFF)
+ break;
+ if (i < 10 || i == length)
+ return 0;
+ if (buffer[i] != 0x00)
+ return 0;
+ return 1;
+}
+
+/**
+ * Check the message for PKCS12 padding.
+ */
+static inline int is_PKCS12_padded(unsigned char *buffer, int length)
+{
+ int i;
+ if ((buffer[0] != 0x00) || (buffer[1] != 0x02))
+ return 0;
+ for (i = 2; i < length; i++)
+ if (buffer[i] == 0x00)
+ break;
+ if ((i < 10) || (i == length))
+ return 0;
+ if (buffer[i] != 0x00)
+ return 0;
+ return 1;
+}
+
+/**
+ * Convert a ICAMEX message to a type6 MEX message.
+ *
+ * @zdev: crypto device pointer
+ * @zreq: crypto request pointer
+ * @mex: pointer to user input data
+ *
+ * Returns 0 on success or -EFAULT.
+ */
+static int ICAMEX_msg_to_type6MEX_msg(struct zcrypt_device *zdev,
+ struct ap_message *ap_msg,
+ struct ica_rsa_modexpo *mex)
+{
+ static struct type6_hdr static_type6_hdr = {
+ .type = 0x06,
+ .offset1 = 0x00000058,
+ .agent_id = {0x01,0x00,0x43,0x43,0x41,0x2D,0x41,0x50,
+ 0x50,0x4C,0x20,0x20,0x20,0x01,0x01,0x01},
+ .function_code = {'P','K'},
+ };
+ static struct function_and_rules_block static_pke_function_and_rules ={
+ .function_code = {'P','K'},
+ .ulen = __constant_cpu_to_le16(10),
+ .only_rule = {'P','K','C','S','-','1','.','2'}
+ };
+ struct {
+ struct type6_hdr hdr;
+ struct CPRB cprb;
+ struct function_and_rules_block fr;
+ unsigned short length;
+ char text[0];
+ } __attribute__((packed)) *msg = ap_msg->message;
+ int vud_len, pad_len, size;
+
+ /* VUD.ciphertext */
+ if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
+ return -EFAULT;
+
+ if (is_PKCS11_padded(msg->text, mex->inputdatalength))
+ return -EINVAL;
+
+ /* static message header and f&r */
+ msg->hdr = static_type6_hdr;
+ msg->fr = static_pke_function_and_rules;
+
+ if (is_PKCS12_padded(msg->text, mex->inputdatalength)) {
+ /* strip the padding and adjust the data length */
+ pad_len = strnlen(msg->text + 2, mex->inputdatalength - 2) + 3;
+ if (pad_len <= 9 || pad_len >= mex->inputdatalength)
+ return -ENODEV;
+ vud_len = mex->inputdatalength - pad_len;
+ memmove(msg->text, msg->text + pad_len, vud_len);
+ msg->length = cpu_to_le16(vud_len + 2);
+
+ /* Set up key after the variable length text. */
+ size = zcrypt_type6_mex_key_en(mex, msg->text + vud_len, 0);
+ if (size < 0)
+ return size;
+ size += sizeof(*msg) + vud_len; /* total size of msg */
+ } else {
+ vud_len = mex->inputdatalength;
+ msg->length = cpu_to_le16(2 + vud_len);
+
+ msg->hdr.function_code[1] = 'D';
+ msg->fr.function_code[1] = 'D';
+
+ /* Set up key after the variable length text. */
+ size = zcrypt_type6_mex_key_de(mex, msg->text + vud_len, 0);
+ if (size < 0)
+ return size;
+ size += sizeof(*msg) + vud_len; /* total size of msg */
+ }
+
+ /* message header, cprb and f&r */
+ msg->hdr.ToCardLen1 = (size - sizeof(msg->hdr) + 3) & -4;
+ msg->hdr.FromCardLen1 = PCICC_MAX_RESPONSE_SIZE - sizeof(msg->hdr);
+
+ msg->cprb = static_cprb;
+ msg->cprb.usage_domain[0]= AP_QID_QUEUE(zdev->ap_dev->qid);
+ msg->cprb.req_parml = cpu_to_le16(size - sizeof(msg->hdr) -
+ sizeof(msg->cprb));
+ msg->cprb.rpl_parml = cpu_to_le16(msg->hdr.FromCardLen1);
+
+ ap_msg->length = (size + 3) & -4;
+ return 0;
+}
+
+/**
+ * Convert a ICACRT message to a type6 CRT message.
+ *
+ * @zdev: crypto device pointer
+ * @zreq: crypto request pointer
+ * @crt: pointer to user input data
+ *
+ * Returns 0 on success or -EFAULT.
+ */
+static int ICACRT_msg_to_type6CRT_msg(struct zcrypt_device *zdev,
+ struct ap_message *ap_msg,
+ struct ica_rsa_modexpo_crt *crt)
+{
+ static struct type6_hdr static_type6_hdr = {
+ .type = 0x06,
+ .offset1 = 0x00000058,
+ .agent_id = {0x01,0x00,0x43,0x43,0x41,0x2D,0x41,0x50,
+ 0x50,0x4C,0x20,0x20,0x20,0x01,0x01,0x01},
+ .function_code = {'P','D'},
+ };
+ static struct function_and_rules_block static_pkd_function_and_rules ={
+ .function_code = {'P','D'},
+ .ulen = __constant_cpu_to_le16(10),
+ .only_rule = {'P','K','C','S','-','1','.','2'}
+ };
+ struct {
+ struct type6_hdr hdr;
+ struct CPRB cprb;
+ struct function_and_rules_block fr;
+ unsigned short length;
+ char text[0];
+ } __attribute__((packed)) *msg = ap_msg->message;
+ int size;
+
+ /* VUD.ciphertext */
+ msg->length = cpu_to_le16(2 + crt->inputdatalength);
+ if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))
+ return -EFAULT;
+
+ if (is_PKCS11_padded(msg->text, crt->inputdatalength))
+ return -EINVAL;
+
+ /* Set up key after the variable length text. */
+ size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 0);
+ if (size < 0)
+ return size;
+ size += sizeof(*msg) + crt->inputdatalength; /* total size of msg */
+
+ /* message header, cprb and f&r */
+ msg->hdr = static_type6_hdr;
+ msg->hdr.ToCardLen1 = (size - sizeof(msg->hdr) + 3) & -4;
+ msg->hdr.FromCardLen1 = PCICC_MAX_RESPONSE_SIZE - sizeof(msg->hdr);
+
+ msg->cprb = static_cprb;
+ msg->cprb.usage_domain[0] = AP_QID_QUEUE(zdev->ap_dev->qid);
+ msg->cprb.req_parml = msg->cprb.rpl_parml =
+ cpu_to_le16(size - sizeof(msg->hdr) - sizeof(msg->cprb));
+
+ msg->fr = static_pkd_function_and_rules;
+
+ ap_msg->length = (size + 3) & -4;
+ return 0;
+}
+
+/**
+ * Copy results from a type 86 reply message back to user space.
+ *
+ * @zdev: crypto device pointer
+ * @reply: reply AP message.
+ * @data: pointer to user output data
+ * @length: size of user output data
+ *
+ * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
+ */
+struct type86_reply {
+ struct type86_hdr hdr;
+ struct type86_fmt2_ext fmt2;
+ struct CPRB cprb;
+ unsigned char pad[4]; /* 4 byte function code/rules block ? */
+ unsigned short length;
+ char text[0];
+} __attribute__((packed));
+
+static int convert_type86(struct zcrypt_device *zdev,
+ struct ap_message *reply,
+ char __user *outputdata,
+ unsigned int outputdatalength)
+{
+ static unsigned char static_pad[] = {
+ 0x00,0x02,
+ 0x1B,0x7B,0x5D,0xB5,0x75,0x01,0x3D,0xFD,
+ 0x8D,0xD1,0xC7,0x03,0x2D,0x09,0x23,0x57,
+ 0x89,0x49,0xB9,0x3F,0xBB,0x99,0x41,0x5B,
+ 0x75,0x21,0x7B,0x9D,0x3B,0x6B,0x51,0x39,
+ 0xBB,0x0D,0x35,0xB9,0x89,0x0F,0x93,0xA5,
+ 0x0B,0x47,0xF1,0xD3,0xBB,0xCB,0xF1,0x9D,
+ 0x23,0x73,0x71,0xFF,0xF3,0xF5,0x45,0xFB,
+ 0x61,0x29,0x23,0xFD,0xF1,0x29,0x3F,0x7F,
+ 0x17,0xB7,0x1B,0xA9,0x19,0xBD,0x57,0xA9,
+ 0xD7,0x95,0xA3,0xCB,0xED,0x1D,0xDB,0x45,
+ 0x7D,0x11,0xD1,0x51,0x1B,0xED,0x71,0xE9,
+ 0xB1,0xD1,0xAB,0xAB,0x21,0x2B,0x1B,0x9F,
+ 0x3B,0x9F,0xF7,0xF7,0xBD,0x63,0xEB,0xAD,
+ 0xDF,0xB3,0x6F,0x5B,0xDB,0x8D,0xA9,0x5D,
+ 0xE3,0x7D,0x77,0x49,0x47,0xF5,0xA7,0xFD,
+ 0xAB,0x2F,0x27,0x35,0x77,0xD3,0x49,0xC9,
+ 0x09,0xEB,0xB1,0xF9,0xBF,0x4B,0xCB,0x2B,
+ 0xEB,0xEB,0x05,0xFF,0x7D,0xC7,0x91,0x8B,
+ 0x09,0x83,0xB9,0xB9,0x69,0x33,0x39,0x6B,
+ 0x79,0x75,0x19,0xBF,0xBB,0x07,0x1D,0xBD,
+ 0x29,0xBF,0x39,0x95,0x93,0x1D,0x35,0xC7,
+ 0xC9,0x4D,0xE5,0x97,0x0B,0x43,0x9B,0xF1,
+ 0x16,0x93,0x03,0x1F,0xA5,0xFB,0xDB,0xF3,
+ 0x27,0x4F,0x27,0x61,0x05,0x1F,0xB9,0x23,
+ 0x2F,0xC3,0x81,0xA9,0x23,0x71,0x55,0x55,
+ 0xEB,0xED,0x41,0xE5,0xF3,0x11,0xF1,0x43,
+ 0x69,0x03,0xBD,0x0B,0x37,0x0F,0x51,0x8F,
+ 0x0B,0xB5,0x89,0x5B,0x67,0xA9,0xD9,0x4F,
+ 0x01,0xF9,0x21,0x77,0x37,0x73,0x79,0xC5,
+ 0x7F,0x51,0xC1,0xCF,0x97,0xA1,0x75,0xAD,
+ 0x35,0x9D,0xD3,0xD3,0xA7,0x9D,0x5D,0x41,
+ 0x6F,0x65,0x1B,0xCF,0xA9,0x87,0x91,0x09
+ };
+ struct type86_reply *msg = reply->message;
+ unsigned short service_rc, service_rs;
+ unsigned int reply_len, pad_len;
+ char *data;
+
+ service_rc = le16_to_cpu(msg->cprb.ccp_rtcode);
+ if (unlikely(service_rc != 0)) {
+ service_rs = le16_to_cpu(msg->cprb.ccp_rscode);
+ if (service_rc == 8 && service_rs == 66) {
+ PDEBUG("Bad block format on PCICC\n");
+ return -EINVAL;
+ }
+ if (service_rc == 8 && service_rs == 65) {
+ PDEBUG("Probably an even modulus on PCICC\n");
+ return -EINVAL;
+ }
+ if (service_rc == 8 && service_rs == 770) {
+ PDEBUG("Invalid key length on PCICC\n");
+ zdev->max_mod_size = PCICC_MAX_MOD_SIZE_OLD;
+ return -EAGAIN;
+ }
+ if (service_rc == 8 && service_rs == 783) {
+ PDEBUG("Extended bitlengths not enabled on PCICC\n");
+ zdev->max_mod_size = PCICC_MAX_MOD_SIZE_OLD;
+ return -EAGAIN;
+ }
+ PRINTK("Unknown service rc/rs (PCICC): %d/%d\n",
+ service_rc, service_rs);
+ zdev->online = 0;
+ return -EAGAIN; /* repeat the request on a different device. */
+ }
+ data = msg->text;
+ reply_len = le16_to_cpu(msg->length) - 2;
+ if (reply_len > outputdatalength)
+ return -EINVAL;
+ /**
+ * For all encipher requests, the length of the ciphertext (reply_len)
+ * will always equal the modulus length. For MEX decipher requests
+ * the output needs to get padded. Minimum pad size is 10.
+ *
+ * Currently, the cases where padding will be added is for:
+ * - PCIXCC_MCL2 using a CRT form token (since PKD didn't support
+ * ZERO-PAD and CRT is only supported for PKD requests)
+ * - PCICC, always
+ */
+ pad_len = outputdatalength - reply_len;
+ if (pad_len > 0) {
+ if (pad_len < 10)
+ return -EINVAL;
+ /* 'restore' padding left in the PCICC/PCIXCC card. */
+ if (copy_to_user(outputdata, static_pad, pad_len - 1))
+ return -EFAULT;
+ if (put_user(0, outputdata + pad_len - 1))
+ return -EFAULT;
+ }
+ /* Copy the crypto response to user space. */
+ if (copy_to_user(outputdata + pad_len, data, reply_len))
+ return -EFAULT;
+ return 0;
+}
+
+static int convert_response(struct zcrypt_device *zdev,
+ struct ap_message *reply,
+ char __user *outputdata,
+ unsigned int outputdatalength)
+{
+ struct type86_reply *msg = reply->message;
+
+ /* Response type byte is the second byte in the response. */
+ switch (msg->hdr.type) {
+ case TYPE82_RSP_CODE:
+ case TYPE88_RSP_CODE:
+ return convert_error(zdev, reply);
+ case TYPE86_RSP_CODE:
+ if (msg->hdr.reply_code)
+ return convert_error(zdev, reply);
+ if (msg->cprb.cprb_ver_id == 0x01)
+ return convert_type86(zdev, reply,
+ outputdata, outputdatalength);
+ /* no break, incorrect cprb version is an unknown response */
+ default: /* Unknown response type, this should NEVER EVER happen */
+ PRINTK("Unrecognized Message Header: %08x%08x\n",
+ *(unsigned int *) reply->message,
+ *(unsigned int *) (reply->message+4));
+ zdev->online = 0;
+ return -EAGAIN; /* repeat the request on a different device. */
+ }
+}
+
+/**
+ * This function is called from the AP bus code after a crypto request
+ * "msg" has finished with the reply message "reply".
+ * It is called from tasklet context.
+ * @ap_dev: pointer to the AP device
+ * @msg: pointer to the AP message
+ * @reply: pointer to the AP reply message
+ */
+static void zcrypt_pcicc_receive(struct ap_device *ap_dev,
+ struct ap_message *msg,
+ struct ap_message *reply)
+{
+ static struct error_hdr error_reply = {
+ .type = TYPE82_RSP_CODE,
+ .reply_code = REP82_ERROR_MACHINE_FAILURE,
+ };
+ struct type86_reply *t86r = reply->message;
+ int length;
+
+ /* Copy the reply message to the request message buffer. */
+ if (IS_ERR(reply))
+ memcpy(msg->message, &error_reply, sizeof(error_reply));
+ else if (t86r->hdr.type == TYPE86_RSP_CODE &&
+ t86r->cprb.cprb_ver_id == 0x01) {
+ length = sizeof(struct type86_reply) + t86r->length - 2;
+ length = min(PCICC_MAX_RESPONSE_SIZE, length);
+ memcpy(msg->message, reply->message, length);
+ } else
+ memcpy(msg->message, reply->message, sizeof error_reply);
+ complete((struct completion *) msg->private);
+}
+
+static atomic_t zcrypt_step = ATOMIC_INIT(0);
+
+/**
+ * The request distributor calls this function if it picked the PCICC
+ * device to handle a modexpo request.
+ * @zdev: pointer to zcrypt_device structure that identifies the
+ * PCICC device to the request distributor
+ * @mex: pointer to the modexpo request buffer
+ */
+static long zcrypt_pcicc_modexpo(struct zcrypt_device *zdev,
+ struct ica_rsa_modexpo *mex)
+{
+ struct ap_message ap_msg;
+ struct completion work;
+ int rc;
+
+ ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!ap_msg.message)
+ return -ENOMEM;
+ ap_msg.length = PAGE_SIZE;
+ ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
+ atomic_inc_return(&zcrypt_step);
+ ap_msg.private = &work;
+ rc = ICAMEX_msg_to_type6MEX_msg(zdev, &ap_msg, mex);
+ if (rc)
+ goto out_free;
+ init_completion(&work);
+ ap_queue_message(zdev->ap_dev, &ap_msg);
+ rc = wait_for_completion_interruptible_timeout(
+ &work, PCICC_CLEANUP_TIME);
+ if (rc > 0)
+ rc = convert_response(zdev, &ap_msg, mex->outputdata,
+ mex->outputdatalength);
+ else {
+ /* Signal pending or message timed out. */
+ ap_cancel_message(zdev->ap_dev, &ap_msg);
+ if (rc == 0)
+ /* Message timed out. */
+ rc = -ETIME;
+ }
+out_free:
+ free_page((unsigned long) ap_msg.message);
+ return rc;
+}
+
+/**
+ * The request distributor calls this function if it picked the PCICC
+ * device to handle a modexpo_crt request.
+ * @zdev: pointer to zcrypt_device structure that identifies the
+ * PCICC device to the request distributor
+ * @crt: pointer to the modexpoc_crt request buffer
+ */
+static long zcrypt_pcicc_modexpo_crt(struct zcrypt_device *zdev,
+ struct ica_rsa_modexpo_crt *crt)
+{
+ struct ap_message ap_msg;
+ struct completion work;
+ int rc;
+
+ ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!ap_msg.message)
+ return -ENOMEM;
+ ap_msg.length = PAGE_SIZE;
+ ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
+ atomic_inc_return(&zcrypt_step);
+ ap_msg.private = &work;
+ rc = ICACRT_msg_to_type6CRT_msg(zdev, &ap_msg, crt);
+ if (rc)
+ goto out_free;
+ init_completion(&work);
+ ap_queue_message(zdev->ap_dev, &ap_msg);
+ rc = wait_for_completion_interruptible_timeout(
+ &work, PCICC_CLEANUP_TIME);
+ if (rc > 0)
+ rc = convert_response(zdev, &ap_msg, crt->outputdata,
+ crt->outputdatalength);
+ else {
+ /* Signal pending or message timed out. */
+ ap_cancel_message(zdev->ap_dev, &ap_msg);
+ if (rc == 0)
+ /* Message timed out. */
+ rc = -ETIME;
+ }
+out_free:
+ free_page((unsigned long) ap_msg.message);
+ return rc;
+}
+
+/**
+ * The crypto operations for a PCICC card.
+ */
+static struct zcrypt_ops zcrypt_pcicc_ops = {
+ .rsa_modexpo = zcrypt_pcicc_modexpo,
+ .rsa_modexpo_crt = zcrypt_pcicc_modexpo_crt,
+};
+
+/**
+ * Probe function for PCICC 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_pcicc_probe(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev;
+ int rc;
+
+ zdev = zcrypt_device_alloc(PCICC_MAX_RESPONSE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ zdev->ap_dev = ap_dev;
+ zdev->ops = &zcrypt_pcicc_ops;
+ zdev->online = 1;
+ zdev->user_space_type = ZCRYPT_PCICC;
+ zdev->type_string = "PCICC";
+ zdev->min_mod_size = PCICC_MIN_MOD_SIZE;
+ zdev->max_mod_size = PCICC_MAX_MOD_SIZE;
+ zdev->speed_rating = PCICC_SPEED_RATING;
+ ap_dev->reply = &zdev->reply;
+ ap_dev->private = zdev;
+ rc = zcrypt_device_register(zdev);
+ if (rc)
+ goto out_free;
+ return 0;
+
+ out_free:
+ ap_dev->private = NULL;
+ zcrypt_device_free(zdev);
+ return rc;
+}
+
+/**
+ * This is called to remove the extended PCICC driver information
+ * if an AP device is removed.
+ */
+static void zcrypt_pcicc_remove(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev = ap_dev->private;
+
+ zcrypt_device_unregister(zdev);
+}
+
+int __init zcrypt_pcicc_init(void)
+{
+ return ap_driver_register(&zcrypt_pcicc_driver, THIS_MODULE, "pcicc");
+}
+
+void zcrypt_pcicc_exit(void)
+{
+ ap_driver_unregister(&zcrypt_pcicc_driver);
+}
+
+#ifndef CONFIG_ZCRYPT_MONOLITHIC
+module_init(zcrypt_pcicc_init);
+module_exit(zcrypt_pcicc_exit);
+#endif