summaryrefslogtreecommitdiff
path: root/drivers/s390/crypto/zcrypt_pcixcc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/crypto/zcrypt_pcixcc.c')
-rw-r--r--drivers/s390/crypto/zcrypt_pcixcc.c951
1 files changed, 951 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
new file mode 100644
index 00000000000..2da8b938140
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -0,0 +1,951 @@
+/*
+ * linux/drivers/s390/crypto/zcrypt_pcixcc.c
+ *
+ * zcrypt 2.1.0
+ *
+ * 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 <linux/delay.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_pcixcc.h"
+#include "zcrypt_cca_key.h"
+
+#define PCIXCC_MIN_MOD_SIZE 16 /* 128 bits */
+#define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */
+#define PCIXCC_MAX_MOD_SIZE 256 /* 2048 bits */
+
+#define PCIXCC_MCL2_SPEED_RATING 7870 /* FIXME: needs finetuning */
+#define PCIXCC_MCL3_SPEED_RATING 7870
+#define CEX2C_SPEED_RATING 8540
+
+#define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c /* max size type6 v2 crt message */
+#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
+
+#define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
+#define PCIXCC_MAX_XCRB_RESPONSE_SIZE PCIXCC_MAX_XCRB_MESSAGE_SIZE
+#define PCIXCC_MAX_XCRB_DATA_SIZE (11*1024)
+#define PCIXCC_MAX_XCRB_REPLY_SIZE (5*1024)
+
+#define PCIXCC_MAX_RESPONSE_SIZE PCIXCC_MAX_XCRB_RESPONSE_SIZE
+
+#define PCIXCC_CLEANUP_TIME (15*HZ)
+
+#define CEIL4(x) ((((x)+3)/4)*4)
+
+struct response_type {
+ struct completion work;
+ int type;
+};
+#define PCIXCC_RESPONSE_TYPE_ICA 0
+#define PCIXCC_RESPONSE_TYPE_XCRB 1
+
+static struct ap_device_id zcrypt_pcixcc_ids[] = {
+ { AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
+ { AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
+ { /* end of list */ },
+};
+
+#ifndef CONFIG_ZCRYPT_MONOLITHIC
+MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, "
+ "Copyright 2001, 2006 IBM Corporation");
+MODULE_LICENSE("GPL");
+#endif
+
+static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
+static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
+static void zcrypt_pcixcc_receive(struct ap_device *, struct ap_message *,
+ struct ap_message *);
+
+static struct ap_driver zcrypt_pcixcc_driver = {
+ .probe = zcrypt_pcixcc_probe,
+ .remove = zcrypt_pcixcc_remove,
+ .receive = zcrypt_pcixcc_receive,
+ .ids = zcrypt_pcixcc_ids,
+};
+
+/**
+ * The following is used to initialize the CPRBX passed to the PCIXCC/CEX2C
+ * card in a type6 message. The 3 fields that must be filled in at execution
+ * time are req_parml, rpl_parml and usage_domain.
+ * Everything about this interface is ascii/big-endian, since the
+ * device does *not* have 'Intel inside'.
+ *
+ * The CPRBX is followed immediately by the parm block.
+ * The parm block contains:
+ * - function code ('PD' 0x5044 or 'PK' 0x504B)
+ * - rule block (one of:)
+ * + 0x000A 'PKCS-1.2' (MCL2 'PD')
+ * + 0x000A 'ZERO-PAD' (MCL2 'PK')
+ * + 0x000A 'ZERO-PAD' (MCL3 'PD' or CEX2C 'PD')
+ * + 0x000A 'MRP ' (MCL3 'PK' or CEX2C 'PK')
+ * - VUD block
+ */
+static struct CPRBX static_cprbx = {
+ .cprb_len = 0x00DC,
+ .cprb_ver_id = 0x02,
+ .func_id = {0x54,0x32},
+};
+
+/**
+ * Convert a ICAMEX message to a type6 MEX message.
+ *
+ * @zdev: crypto device pointer
+ * @ap_msg: pointer to AP message
+ * @mex: pointer to user input data
+ *
+ * Returns 0 on success or -EFAULT.
+ */
+static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_device *zdev,
+ struct ap_message *ap_msg,
+ struct ica_rsa_modexpo *mex)
+{
+ static struct type6_hdr static_type6_hdrX = {
+ .type = 0x06,
+ .offset1 = 0x00000058,
+ .agent_id = {'C','A',},
+ .function_code = {'P','K'},
+ };
+ static struct function_and_rules_block static_pke_fnr = {
+ .function_code = {'P','K'},
+ .ulen = 10,
+ .only_rule = {'M','R','P',' ',' ',' ',' ',' '}
+ };
+ static struct function_and_rules_block static_pke_fnr_MCL2 = {
+ .function_code = {'P','K'},
+ .ulen = 10,
+ .only_rule = {'Z','E','R','O','-','P','A','D'}
+ };
+ struct {
+ struct type6_hdr hdr;
+ struct CPRBX cprbx;
+ struct function_and_rules_block fr;
+ unsigned short length;
+ char text[0];
+ } __attribute__((packed)) *msg = ap_msg->message;
+ int size;
+
+ /* VUD.ciphertext */
+ msg->length = mex->inputdatalength + 2;
+ if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
+ return -EFAULT;
+
+ /* Set up key which is located after the variable length text. */
+ size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength, 1);
+ if (size < 0)
+ return size;
+ size += sizeof(*msg) + mex->inputdatalength;
+
+ /* message header, cprbx and f&r */
+ msg->hdr = static_type6_hdrX;
+ msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
+ msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
+
+ msg->cprbx = static_cprbx;
+ msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
+ msg->cprbx.rpl_msgbl = msg->hdr.FromCardLen1;
+
+ msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
+ static_pke_fnr_MCL2 : static_pke_fnr;
+
+ msg->cprbx.req_parml = size - sizeof(msg->hdr) - sizeof(msg->cprbx);
+
+ ap_msg->length = size;
+ return 0;
+}
+
+/**
+ * Convert a ICACRT message to a type6 CRT message.
+ *
+ * @zdev: crypto device pointer
+ * @ap_msg: pointer to AP message
+ * @crt: pointer to user input data
+ *
+ * Returns 0 on success or -EFAULT.
+ */
+static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_device *zdev,
+ struct ap_message *ap_msg,
+ struct ica_rsa_modexpo_crt *crt)
+{
+ static struct type6_hdr static_type6_hdrX = {
+ .type = 0x06,
+ .offset1 = 0x00000058,
+ .agent_id = {'C','A',},
+ .function_code = {'P','D'},
+ };
+ static struct function_and_rules_block static_pkd_fnr = {
+ .function_code = {'P','D'},
+ .ulen = 10,
+ .only_rule = {'Z','E','R','O','-','P','A','D'}
+ };
+
+ static struct function_and_rules_block static_pkd_fnr_MCL2 = {
+ .function_code = {'P','D'},
+ .ulen = 10,
+ .only_rule = {'P','K','C','S','-','1','.','2'}
+ };
+ struct {
+ struct type6_hdr hdr;
+ struct CPRBX cprbx;
+ struct function_and_rules_block fr;
+ unsigned short length;
+ char text[0];
+ } __attribute__((packed)) *msg = ap_msg->message;
+ int size;
+
+ /* VUD.ciphertext */
+ msg->length = crt->inputdatalength + 2;
+ if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))
+ return -EFAULT;
+
+ /* Set up key which is located after the variable length text. */
+ size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 1);
+ if (size < 0)
+ return size;
+ size += sizeof(*msg) + crt->inputdatalength; /* total size of msg */
+
+ /* message header, cprbx and f&r */
+ msg->hdr = static_type6_hdrX;
+ msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
+ msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
+
+ msg->cprbx = static_cprbx;
+ msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
+ msg->cprbx.req_parml = msg->cprbx.rpl_msgbl =
+ size - sizeof(msg->hdr) - sizeof(msg->cprbx);
+
+ msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
+ static_pkd_fnr_MCL2 : static_pkd_fnr;
+
+ ap_msg->length = size;
+ return 0;
+}
+
+/**
+ * Convert a XCRB message to a type6 CPRB message.
+ *
+ * @zdev: crypto device pointer
+ * @ap_msg: pointer to AP message
+ * @xcRB: pointer to user input data
+ *
+ * Returns 0 on success or -EFAULT.
+ */
+struct type86_fmt2_msg {
+ struct type86_hdr hdr;
+ struct type86_fmt2_ext fmt2;
+} __attribute__((packed));
+
+static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
+ struct ap_message *ap_msg,
+ struct ica_xcRB *xcRB)
+{
+ static struct type6_hdr static_type6_hdrX = {
+ .type = 0x06,
+ .offset1 = 0x00000058,
+ };
+ struct {
+ struct type6_hdr hdr;
+ struct ica_CPRBX cprbx;
+ } __attribute__((packed)) *msg = ap_msg->message;
+
+ int rcblen = CEIL4(xcRB->request_control_blk_length);
+ int replylen;
+ char *req_data = ap_msg->message + sizeof(struct type6_hdr) + rcblen;
+ char *function_code;
+
+ /* length checks */
+ ap_msg->length = sizeof(struct type6_hdr) +
+ CEIL4(xcRB->request_control_blk_length) +
+ xcRB->request_data_length;
+ if (ap_msg->length > PCIXCC_MAX_XCRB_MESSAGE_SIZE) {
+ PRINTK("Combined message is too large (%ld/%d/%d).\n",
+ sizeof(struct type6_hdr),
+ xcRB->request_control_blk_length,
+ xcRB->request_data_length);
+ return -EFAULT;
+ }
+ if (CEIL4(xcRB->reply_control_blk_length) >
+ PCIXCC_MAX_XCRB_REPLY_SIZE) {
+ PDEBUG("Reply CPRB length is too large (%d).\n",
+ xcRB->request_control_blk_length);
+ return -EFAULT;
+ }
+ if (CEIL4(xcRB->reply_data_length) > PCIXCC_MAX_XCRB_DATA_SIZE) {
+ PDEBUG("Reply data block length is too large (%d).\n",
+ xcRB->reply_data_length);
+ return -EFAULT;
+ }
+ replylen = CEIL4(xcRB->reply_control_blk_length) +
+ CEIL4(xcRB->reply_data_length) +
+ sizeof(struct type86_fmt2_msg);
+ if (replylen > PCIXCC_MAX_XCRB_RESPONSE_SIZE) {
+ PDEBUG("Reply CPRB + data block > PCIXCC_MAX_XCRB_RESPONSE_SIZE"
+ " (%d/%d/%d).\n",
+ sizeof(struct type86_fmt2_msg),
+ xcRB->reply_control_blk_length,
+ xcRB->reply_data_length);
+ xcRB->reply_control_blk_length = PCIXCC_MAX_XCRB_RESPONSE_SIZE -
+ (sizeof(struct type86_fmt2_msg) +
+ CEIL4(xcRB->reply_data_length));
+ PDEBUG("Capping Reply CPRB length at %d\n",
+ xcRB->reply_control_blk_length);
+ }
+
+ /* prepare type6 header */
+ msg->hdr = static_type6_hdrX;
+ memcpy(msg->hdr.agent_id , &(xcRB->agent_ID), sizeof(xcRB->agent_ID));
+ msg->hdr.ToCardLen1 = xcRB->request_control_blk_length;
+ if (xcRB->request_data_length) {
+ msg->hdr.offset2 = msg->hdr.offset1 + rcblen;
+ msg->hdr.ToCardLen2 = xcRB->request_data_length;
+ }
+ msg->hdr.FromCardLen1 = xcRB->reply_control_blk_length;
+ msg->hdr.FromCardLen2 = xcRB->reply_data_length;
+
+ /* prepare CPRB */
+ if (copy_from_user(&(msg->cprbx), xcRB->request_control_blk_addr,
+ xcRB->request_control_blk_length))
+ return -EFAULT;
+ if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
+ xcRB->request_control_blk_length) {
+ PDEBUG("cprb_len too large (%d/%d)\n", msg->cprbx.cprb_len,
+ xcRB->request_control_blk_length);
+ return -EFAULT;
+ }
+ function_code = ((unsigned char *)&msg->cprbx) + msg->cprbx.cprb_len;
+ memcpy(msg->hdr.function_code, function_code, sizeof(msg->hdr.function_code));
+
+ /* copy data block */
+ if (xcRB->request_data_length &&
+ copy_from_user(req_data, xcRB->request_data_address,
+ xcRB->request_data_length))
+ return -EFAULT;
+ return 0;
+}
+
+/**
+ * Copy results from a type 86 ICA 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 type86x_reply {
+ struct type86_hdr hdr;
+ struct type86_fmt2_ext fmt2;
+ struct CPRBX cprbx;
+ unsigned char pad[4]; /* 4 byte function code/rules block ? */
+ unsigned short length;
+ char text[0];
+} __attribute__((packed));
+
+static int convert_type86_ica(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 type86x_reply *msg = reply->message;
+ unsigned short service_rc, service_rs;
+ unsigned int reply_len, pad_len;
+ char *data;
+
+ service_rc = msg->cprbx.ccp_rtcode;
+ if (unlikely(service_rc != 0)) {
+ service_rs = msg->cprbx.ccp_rscode;
+ if (service_rc == 8 && service_rs == 66) {
+ PDEBUG("Bad block format on PCIXCC/CEX2C\n");
+ return -EINVAL;
+ }
+ if (service_rc == 8 && service_rs == 65) {
+ PDEBUG("Probably an even modulus on PCIXCC/CEX2C\n");
+ return -EINVAL;
+ }
+ if (service_rc == 8 && service_rs == 770) {
+ PDEBUG("Invalid key length on PCIXCC/CEX2C\n");
+ zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
+ return -EAGAIN;
+ }
+ if (service_rc == 8 && service_rs == 783) {
+ PDEBUG("Extended bitlengths not enabled on PCIXCC/CEX2C\n");
+ zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
+ return -EAGAIN;
+ }
+ PRINTK("Unknown service rc/rs (PCIXCC/CEX2C): %d/%d\n",
+ service_rc, service_rs);
+ zdev->online = 0;
+ return -EAGAIN; /* repeat the request on a different device. */
+ }
+ data = msg->text;
+ reply_len = 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;
+}
+
+/**
+ * Copy results from a type 86 XCRB reply message back to user space.
+ *
+ * @zdev: crypto device pointer
+ * @reply: reply AP message.
+ * @xcRB: pointer to XCRB
+ *
+ * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
+ */
+static int convert_type86_xcrb(struct zcrypt_device *zdev,
+ struct ap_message *reply,
+ struct ica_xcRB *xcRB)
+{
+ struct type86_fmt2_msg *msg = reply->message;
+ char *data = reply->message;
+
+ /* Copy CPRB to user */
+ if (copy_to_user(xcRB->reply_control_blk_addr,
+ data + msg->fmt2.offset1, msg->fmt2.count1))
+ return -EFAULT;
+ xcRB->reply_control_blk_length = msg->fmt2.count1;
+
+ /* Copy data buffer to user */
+ if (msg->fmt2.count2)
+ if (copy_to_user(xcRB->reply_data_addr,
+ data + msg->fmt2.offset2, msg->fmt2.count2))
+ return -EFAULT;
+ xcRB->reply_data_length = msg->fmt2.count2;
+ return 0;
+}
+
+static int convert_response_ica(struct zcrypt_device *zdev,
+ struct ap_message *reply,
+ char __user *outputdata,
+ unsigned int outputdatalength)
+{
+ struct type86x_reply *msg = reply->message;
+
+ /* Response type byte is the second byte in the response. */
+ switch (((unsigned char *) reply->message)[1]) {
+ 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->cprbx.cprb_ver_id == 0x02)
+ return convert_type86_ica(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. */
+ }
+}
+
+static int convert_response_xcrb(struct zcrypt_device *zdev,
+ struct ap_message *reply,
+ struct ica_xcRB *xcRB)
+{
+ struct type86x_reply *msg = reply->message;
+
+ /* Response type byte is the second byte in the response. */
+ switch (((unsigned char *) reply->message)[1]) {
+ case TYPE82_RSP_CODE:
+ case TYPE88_RSP_CODE:
+ xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
+ return convert_error(zdev, reply);
+ case TYPE86_RSP_CODE:
+ if (msg->hdr.reply_code) {
+ memcpy(&(xcRB->status), msg->fmt2.apfs, sizeof(u32));
+ return convert_error(zdev, reply);
+ }
+ if (msg->cprbx.cprb_ver_id == 0x02)
+ return convert_type86_xcrb(zdev, reply, xcRB);
+ /* 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));
+ xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
+ 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_pcixcc_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 response_type *resp_type =
+ (struct response_type *) msg->private;
+ struct type86x_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->cprbx.cprb_ver_id == 0x02) {
+ switch (resp_type->type) {
+ case PCIXCC_RESPONSE_TYPE_ICA:
+ length = sizeof(struct type86x_reply)
+ + t86r->length - 2;
+ length = min(PCIXCC_MAX_ICA_RESPONSE_SIZE, length);
+ memcpy(msg->message, reply->message, length);
+ break;
+ case PCIXCC_RESPONSE_TYPE_XCRB:
+ length = t86r->fmt2.offset2 + t86r->fmt2.count2;
+ length = min(PCIXCC_MAX_XCRB_RESPONSE_SIZE, length);
+ memcpy(msg->message, reply->message, length);
+ break;
+ default:
+ PRINTK("Invalid internal response type: %i\n",
+ resp_type->type);
+ memcpy(msg->message, &error_reply,
+ sizeof error_reply);
+ }
+ } else
+ memcpy(msg->message, reply->message, sizeof error_reply);
+ complete(&(resp_type->work));
+}
+
+static atomic_t zcrypt_step = ATOMIC_INIT(0);
+
+/**
+ * The request distributor calls this function if it picked the PCIXCC/CEX2C
+ * device to handle a modexpo request.
+ * @zdev: pointer to zcrypt_device structure that identifies the
+ * PCIXCC/CEX2C device to the request distributor
+ * @mex: pointer to the modexpo request buffer
+ */
+static long zcrypt_pcixcc_modexpo(struct zcrypt_device *zdev,
+ struct ica_rsa_modexpo *mex)
+{
+ struct ap_message ap_msg;
+ struct response_type resp_type = {
+ .type = PCIXCC_RESPONSE_TYPE_ICA,
+ };
+ int rc;
+
+ ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!ap_msg.message)
+ return -ENOMEM;
+ ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
+ atomic_inc_return(&zcrypt_step);
+ ap_msg.private = &resp_type;
+ rc = ICAMEX_msg_to_type6MEX_msgX(zdev, &ap_msg, mex);
+ if (rc)
+ goto out_free;
+ init_completion(&resp_type.work);
+ ap_queue_message(zdev->ap_dev, &ap_msg);
+ rc = wait_for_completion_interruptible_timeout(
+ &resp_type.work, PCIXCC_CLEANUP_TIME);
+ if (rc > 0)
+ rc = convert_response_ica(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 PCIXCC/CEX2C
+ * device to handle a modexpo_crt request.
+ * @zdev: pointer to zcrypt_device structure that identifies the
+ * PCIXCC/CEX2C device to the request distributor
+ * @crt: pointer to the modexpoc_crt request buffer
+ */
+static long zcrypt_pcixcc_modexpo_crt(struct zcrypt_device *zdev,
+ struct ica_rsa_modexpo_crt *crt)
+{
+ struct ap_message ap_msg;
+ struct response_type resp_type = {
+ .type = PCIXCC_RESPONSE_TYPE_ICA,
+ };
+ int rc;
+
+ ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!ap_msg.message)
+ return -ENOMEM;
+ ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
+ atomic_inc_return(&zcrypt_step);
+ ap_msg.private = &resp_type;
+ rc = ICACRT_msg_to_type6CRT_msgX(zdev, &ap_msg, crt);
+ if (rc)
+ goto out_free;
+ init_completion(&resp_type.work);
+ ap_queue_message(zdev->ap_dev, &ap_msg);
+ rc = wait_for_completion_interruptible_timeout(
+ &resp_type.work, PCIXCC_CLEANUP_TIME);
+ if (rc > 0)
+ rc = convert_response_ica(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 request distributor calls this function if it picked the PCIXCC/CEX2C
+ * device to handle a send_cprb request.
+ * @zdev: pointer to zcrypt_device structure that identifies the
+ * PCIXCC/CEX2C device to the request distributor
+ * @xcRB: pointer to the send_cprb request buffer
+ */
+long zcrypt_pcixcc_send_cprb(struct zcrypt_device *zdev, struct ica_xcRB *xcRB)
+{
+ struct ap_message ap_msg;
+ struct response_type resp_type = {
+ .type = PCIXCC_RESPONSE_TYPE_XCRB,
+ };
+ int rc;
+
+ ap_msg.message = (void *) kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
+ if (!ap_msg.message)
+ return -ENOMEM;
+ ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
+ atomic_inc_return(&zcrypt_step);
+ ap_msg.private = &resp_type;
+ rc = XCRB_msg_to_type6CPRB_msgX(zdev, &ap_msg, xcRB);
+ if (rc)
+ goto out_free;
+ init_completion(&resp_type.work);
+ ap_queue_message(zdev->ap_dev, &ap_msg);
+ rc = wait_for_completion_interruptible_timeout(
+ &resp_type.work, PCIXCC_CLEANUP_TIME);
+ if (rc > 0)
+ rc = convert_response_xcrb(zdev, &ap_msg, xcRB);
+ 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:
+ memset(ap_msg.message, 0x0, ap_msg.length);
+ kfree(ap_msg.message);
+ return rc;
+}
+
+/**
+ * The crypto operations for a PCIXCC/CEX2C card.
+ */
+static struct zcrypt_ops zcrypt_pcixcc_ops = {
+ .rsa_modexpo = zcrypt_pcixcc_modexpo,
+ .rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
+ .send_cprb = zcrypt_pcixcc_send_cprb,
+};
+
+/**
+ * Micro-code detection function. Its sends a message to a pcixcc card
+ * to find out the microcode level.
+ * @ap_dev: pointer to the AP device.
+ */
+static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
+{
+ static unsigned char msg[] = {
+ 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
+ 0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
+ 0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
+ 0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
+ 0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
+ 0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
+ 0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
+ 0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
+ 0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
+ 0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
+ 0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
+ 0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
+ 0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
+ 0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
+ 0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
+ 0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
+ 0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
+ 0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
+ 0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
+ 0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
+ 0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
+ 0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
+ 0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
+ 0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
+ 0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
+ 0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
+ 0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
+ 0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
+ 0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
+ 0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
+ 0xF1,0x3D,0x93,0x53
+ };
+ unsigned long long psmid;
+ struct CPRBX *cprbx;
+ char *reply;
+ int rc, i;
+
+ reply = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!reply)
+ return -ENOMEM;
+
+ rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
+ if (rc)
+ goto out_free;
+
+ /* Wait for the test message to complete. */
+ for (i = 0; i < 6; i++) {
+ mdelay(300);
+ rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
+ if (rc == 0 && psmid == 0x0102030405060708ULL)
+ break;
+ }
+
+ if (i >= 6) {
+ /* Got no answer. */
+ rc = -ENODEV;
+ goto out_free;
+ }
+
+ cprbx = (struct CPRBX *) (reply + 48);
+ if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
+ rc = ZCRYPT_PCIXCC_MCL2;
+ else
+ rc = ZCRYPT_PCIXCC_MCL3;
+out_free:
+ free_page((unsigned long) reply);
+ return rc;
+}
+
+/**
+ * Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
+ * since the bus_match already checked the hardware type. The PCIXCC
+ * cards come in two flavours: micro code level 2 and micro code level 3.
+ * This is checked by sending a test message to the device.
+ * @ap_dev: pointer to the AP device.
+ */
+static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev;
+ int rc;
+
+ zdev = zcrypt_device_alloc(PCIXCC_MAX_RESPONSE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ zdev->ap_dev = ap_dev;
+ zdev->ops = &zcrypt_pcixcc_ops;
+ zdev->online = 1;
+ if (ap_dev->device_type == AP_DEVICE_TYPE_PCIXCC) {
+ rc = zcrypt_pcixcc_mcl(ap_dev);
+ if (rc < 0) {
+ zcrypt_device_free(zdev);
+ return rc;
+ }
+ zdev->user_space_type = rc;
+ if (rc == ZCRYPT_PCIXCC_MCL2) {
+ zdev->type_string = "PCIXCC_MCL2";
+ zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
+ zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
+ zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
+ } else {
+ zdev->type_string = "PCIXCC_MCL3";
+ zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
+ zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
+ zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
+ }
+ } else {
+ zdev->user_space_type = ZCRYPT_CEX2C;
+ zdev->type_string = "CEX2C";
+ zdev->speed_rating = CEX2C_SPEED_RATING;
+ zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
+ zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
+ }
+ 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 PCIXCC/CEX2C driver information
+ * if an AP device is removed.
+ */
+static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev = ap_dev->private;
+
+ zcrypt_device_unregister(zdev);
+}
+
+int __init zcrypt_pcixcc_init(void)
+{
+ return ap_driver_register(&zcrypt_pcixcc_driver, THIS_MODULE, "pcixcc");
+}
+
+void zcrypt_pcixcc_exit(void)
+{
+ ap_driver_unregister(&zcrypt_pcixcc_driver);
+}
+
+#ifndef CONFIG_ZCRYPT_MONOLITHIC
+module_init(zcrypt_pcixcc_init);
+module_exit(zcrypt_pcixcc_exit);
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 05:36:37 +0000