| /* |
| * zcrypt 2.1.0 |
| * |
| * Copyright IBM Corp. 2001, 2012 |
| * Author(s): Robert Burroughs |
| * Eric Rossman (edrossma@us.ibm.com) |
| * Cornelia Huck <cornelia.huck@de.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> |
| * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.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/interrupt.h> |
| #include <linux/miscdevice.h> |
| #include <linux/fs.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/compat.h> |
| #include <linux/slab.h> |
| #include <linux/atomic.h> |
| #include <linux/uaccess.h> |
| #include <linux/hw_random.h> |
| #include <linux/debugfs.h> |
| #include <asm/debug.h> |
| |
| #define CREATE_TRACE_POINTS |
| #include <asm/trace/zcrypt.h> |
| |
| #include "zcrypt_api.h" |
| #include "zcrypt_debug.h" |
| |
| #include "zcrypt_msgtype6.h" |
| #include "zcrypt_msgtype50.h" |
| |
| /* |
| * Module description. |
| */ |
| MODULE_AUTHOR("IBM Corporation"); |
| MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \ |
| "Copyright IBM Corp. 2001, 2012"); |
| MODULE_LICENSE("GPL"); |
| |
| /* |
| * zcrypt tracepoint functions |
| */ |
| EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req); |
| EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep); |
| |
| static int zcrypt_hwrng_seed = 1; |
| module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP); |
| MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on)."); |
| |
| DEFINE_SPINLOCK(zcrypt_list_lock); |
| LIST_HEAD(zcrypt_card_list); |
| int zcrypt_device_count; |
| |
| static atomic_t zcrypt_open_count = ATOMIC_INIT(0); |
| static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0); |
| |
| atomic_t zcrypt_rescan_req = ATOMIC_INIT(0); |
| EXPORT_SYMBOL(zcrypt_rescan_req); |
| |
| static LIST_HEAD(zcrypt_ops_list); |
| |
| /* Zcrypt related debug feature stuff. */ |
| debug_info_t *zcrypt_dbf_info; |
| |
| /** |
| * Process a rescan of the transport layer. |
| * |
| * Returns 1, if the rescan has been processed, otherwise 0. |
| */ |
| static inline int zcrypt_process_rescan(void) |
| { |
| if (atomic_read(&zcrypt_rescan_req)) { |
| atomic_set(&zcrypt_rescan_req, 0); |
| atomic_inc(&zcrypt_rescan_count); |
| ap_bus_force_rescan(); |
| ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n", |
| atomic_inc_return(&zcrypt_rescan_count)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| void zcrypt_msgtype_register(struct zcrypt_ops *zops) |
| { |
| list_add_tail(&zops->list, &zcrypt_ops_list); |
| } |
| |
| void zcrypt_msgtype_unregister(struct zcrypt_ops *zops) |
| { |
| list_del_init(&zops->list); |
| } |
| |
| struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant) |
| { |
| struct zcrypt_ops *zops; |
| |
| list_for_each_entry(zops, &zcrypt_ops_list, list) |
| if ((zops->variant == variant) && |
| (!strncmp(zops->name, name, sizeof(zops->name)))) |
| return zops; |
| return NULL; |
| } |
| EXPORT_SYMBOL(zcrypt_msgtype); |
| |
| /** |
| * zcrypt_read (): Not supported beyond zcrypt 1.3.1. |
| * |
| * This function is not supported beyond zcrypt 1.3.1. |
| */ |
| static ssize_t zcrypt_read(struct file *filp, char __user *buf, |
| size_t count, loff_t *f_pos) |
| { |
| return -EPERM; |
| } |
| |
| /** |
| * zcrypt_write(): Not allowed. |
| * |
| * Write is is not allowed |
| */ |
| static ssize_t zcrypt_write(struct file *filp, const char __user *buf, |
| size_t count, loff_t *f_pos) |
| { |
| return -EPERM; |
| } |
| |
| /** |
| * zcrypt_open(): Count number of users. |
| * |
| * Device open function to count number of users. |
| */ |
| static int zcrypt_open(struct inode *inode, struct file *filp) |
| { |
| atomic_inc(&zcrypt_open_count); |
| return nonseekable_open(inode, filp); |
| } |
| |
| /** |
| * zcrypt_release(): Count number of users. |
| * |
| * Device close function to count number of users. |
| */ |
| static int zcrypt_release(struct inode *inode, struct file *filp) |
| { |
| atomic_dec(&zcrypt_open_count); |
| return 0; |
| } |
| |
| static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc, |
| struct zcrypt_queue *zq, |
| unsigned int weight) |
| { |
| if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner)) |
| return NULL; |
| zcrypt_queue_get(zq); |
| get_device(&zq->queue->ap_dev.device); |
| atomic_add(weight, &zc->load); |
| atomic_add(weight, &zq->load); |
| zq->request_count++; |
| return zq; |
| } |
| |
| static inline void zcrypt_drop_queue(struct zcrypt_card *zc, |
| struct zcrypt_queue *zq, |
| unsigned int weight) |
| { |
| struct module *mod = zq->queue->ap_dev.drv->driver.owner; |
| |
| zq->request_count--; |
| atomic_sub(weight, &zc->load); |
| atomic_sub(weight, &zq->load); |
| put_device(&zq->queue->ap_dev.device); |
| zcrypt_queue_put(zq); |
| module_put(mod); |
| } |
| |
| static inline bool zcrypt_card_compare(struct zcrypt_card *zc, |
| struct zcrypt_card *pref_zc, |
| unsigned weight, unsigned pref_weight) |
| { |
| if (!pref_zc) |
| return false; |
| weight += atomic_read(&zc->load); |
| pref_weight += atomic_read(&pref_zc->load); |
| if (weight == pref_weight) |
| return atomic_read(&zc->card->total_request_count) > |
| atomic_read(&pref_zc->card->total_request_count); |
| return weight > pref_weight; |
| } |
| |
| static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq, |
| struct zcrypt_queue *pref_zq, |
| unsigned weight, unsigned pref_weight) |
| { |
| if (!pref_zq) |
| return false; |
| weight += atomic_read(&zq->load); |
| pref_weight += atomic_read(&pref_zq->load); |
| if (weight == pref_weight) |
| return zq->queue->total_request_count > |
| pref_zq->queue->total_request_count; |
| return weight > pref_weight; |
| } |
| |
| /* |
| * zcrypt ioctls. |
| */ |
| static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| unsigned int weight, pref_weight; |
| unsigned int func_code; |
| int qid = 0, rc = -ENODEV; |
| |
| trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO); |
| |
| if (mex->outputdatalength < mex->inputdatalength) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| /* |
| * As long as outputdatalength is big enough, we can set the |
| * outputdatalength equal to the inputdatalength, since that is the |
| * number of bytes we will copy in any case |
| */ |
| mex->outputdatalength = mex->inputdatalength; |
| |
| rc = get_rsa_modex_fc(mex, &func_code); |
| if (rc) |
| goto out; |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for online accelarator and CCA cards */ |
| if (!zc->online || !(zc->card->functions & 0x18000000)) |
| continue; |
| /* Check for size limits */ |
| if (zc->min_mod_size > mex->inputdatalength || |
| zc->max_mod_size < mex->inputdatalength) |
| continue; |
| /* get weight index of the card device */ |
| weight = zc->speed_rating[func_code]; |
| if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is online and eligible */ |
| if (!zq->online || !zq->ops->rsa_modexpo) |
| continue; |
| if (zcrypt_queue_compare(zq, pref_zq, |
| weight, pref_weight)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_weight = weight; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->rsa_modexpo(pref_zq, mex); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| trace_s390_zcrypt_rep(mex, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| unsigned int weight, pref_weight; |
| unsigned int func_code; |
| int qid = 0, rc = -ENODEV; |
| |
| trace_s390_zcrypt_req(crt, TP_ICARSACRT); |
| |
| if (crt->outputdatalength < crt->inputdatalength) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| /* |
| * As long as outputdatalength is big enough, we can set the |
| * outputdatalength equal to the inputdatalength, since that is the |
| * number of bytes we will copy in any case |
| */ |
| crt->outputdatalength = crt->inputdatalength; |
| |
| rc = get_rsa_crt_fc(crt, &func_code); |
| if (rc) |
| goto out; |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for online accelarator and CCA cards */ |
| if (!zc->online || !(zc->card->functions & 0x18000000)) |
| continue; |
| /* Check for size limits */ |
| if (zc->min_mod_size > crt->inputdatalength || |
| zc->max_mod_size < crt->inputdatalength) |
| continue; |
| /* get weight index of the card device */ |
| weight = zc->speed_rating[func_code]; |
| if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is online and eligible */ |
| if (!zq->online || !zq->ops->rsa_modexpo_crt) |
| continue; |
| if (zcrypt_queue_compare(zq, pref_zq, |
| weight, pref_weight)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_weight = weight; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| trace_s390_zcrypt_rep(crt, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| long zcrypt_send_cprb(struct ica_xcRB *xcRB) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| struct ap_message ap_msg; |
| unsigned int weight, pref_weight; |
| unsigned int func_code; |
| unsigned short *domain; |
| int qid = 0, rc = -ENODEV; |
| |
| trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB); |
| |
| rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain); |
| if (rc) |
| goto out; |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for online CCA cards */ |
| if (!zc->online || !(zc->card->functions & 0x10000000)) |
| continue; |
| /* Check for user selected CCA card */ |
| if (xcRB->user_defined != AUTOSELECT && |
| xcRB->user_defined != zc->card->id) |
| continue; |
| /* get weight index of the card device */ |
| weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY]; |
| if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is online and eligible */ |
| if (!zq->online || |
| !zq->ops->send_cprb || |
| ((*domain != (unsigned short) AUTOSELECT) && |
| (*domain != AP_QID_QUEUE(zq->queue->qid)))) |
| continue; |
| if (zcrypt_queue_compare(zq, pref_zq, |
| weight, pref_weight)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_weight = weight; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| /* in case of auto select, provide the correct domain */ |
| qid = pref_zq->queue->qid; |
| if (*domain == (unsigned short) AUTOSELECT) |
| *domain = AP_QID_QUEUE(qid); |
| |
| rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| trace_s390_zcrypt_rep(xcRB, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| EXPORT_SYMBOL(zcrypt_send_cprb); |
| |
| static bool is_desired_ep11_card(unsigned int dev_id, |
| unsigned short target_num, |
| struct ep11_target_dev *targets) |
| { |
| while (target_num-- > 0) { |
| if (dev_id == targets->ap_id) |
| return true; |
| targets++; |
| } |
| return false; |
| } |
| |
| static bool is_desired_ep11_queue(unsigned int dev_qid, |
| unsigned short target_num, |
| struct ep11_target_dev *targets) |
| { |
| while (target_num-- > 0) { |
| if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid) |
| return true; |
| targets++; |
| } |
| return false; |
| } |
| |
| static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| struct ep11_target_dev *targets; |
| unsigned short target_num; |
| unsigned int weight, pref_weight; |
| unsigned int func_code; |
| struct ap_message ap_msg; |
| int qid = 0, rc = -ENODEV; |
| |
| trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB); |
| |
| target_num = (unsigned short) xcrb->targets_num; |
| |
| /* empty list indicates autoselect (all available targets) */ |
| targets = NULL; |
| if (target_num != 0) { |
| struct ep11_target_dev __user *uptr; |
| |
| targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL); |
| if (!targets) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| uptr = (struct ep11_target_dev __force __user *) xcrb->targets; |
| if (copy_from_user(targets, uptr, |
| target_num * sizeof(*targets))) { |
| rc = -EFAULT; |
| goto out; |
| } |
| } |
| |
| rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code); |
| if (rc) |
| goto out_free; |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for online EP11 cards */ |
| if (!zc->online || !(zc->card->functions & 0x04000000)) |
| continue; |
| /* Check for user selected EP11 card */ |
| if (targets && |
| !is_desired_ep11_card(zc->card->id, target_num, targets)) |
| continue; |
| /* get weight index of the card device */ |
| weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY]; |
| if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is online and eligible */ |
| if (!zq->online || |
| !zq->ops->send_ep11_cprb || |
| (targets && |
| !is_desired_ep11_queue(zq->queue->qid, |
| target_num, targets))) |
| continue; |
| if (zcrypt_queue_compare(zq, pref_zq, |
| weight, pref_weight)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_weight = weight; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| rc = -ENODEV; |
| goto out_free; |
| } |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out_free: |
| kfree(targets); |
| out: |
| trace_s390_zcrypt_rep(xcrb, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| static long zcrypt_rng(char *buffer) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| unsigned int weight, pref_weight; |
| unsigned int func_code; |
| struct ap_message ap_msg; |
| unsigned int domain; |
| int qid = 0, rc = -ENODEV; |
| |
| trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB); |
| |
| rc = get_rng_fc(&ap_msg, &func_code, &domain); |
| if (rc) |
| goto out; |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for online CCA cards */ |
| if (!zc->online || !(zc->card->functions & 0x10000000)) |
| continue; |
| /* get weight index of the card device */ |
| weight = zc->speed_rating[func_code]; |
| if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is online and eligible */ |
| if (!zq->online || !zq->ops->rng) |
| continue; |
| if (zcrypt_queue_compare(zq, pref_zq, |
| weight, pref_weight)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_weight = weight; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) |
| return -ENODEV; |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, weight); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| trace_s390_zcrypt_rep(buffer, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| struct zcrypt_device_status *stat; |
| |
| memset(matrix, 0, sizeof(*matrix)); |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| stat = matrix->device; |
| stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS; |
| stat += AP_QID_QUEUE(zq->queue->qid); |
| stat->hwtype = zc->card->ap_dev.device_type; |
| stat->functions = zc->card->functions >> 26; |
| stat->qid = zq->queue->qid; |
| stat->online = zq->online ? 0x01 : 0x00; |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| } |
| EXPORT_SYMBOL(zcrypt_device_status_mask); |
| |
| static void zcrypt_status_mask(char status[AP_DEVICES]) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| |
| memset(status, 0, sizeof(char) * AP_DEVICES); |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| status[AP_QID_CARD(zq->queue->qid)] = |
| zc->online ? zc->user_space_type : 0x0d; |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| } |
| |
| static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES]) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| |
| memset(qdepth, 0, sizeof(char) * AP_DEVICES); |
| spin_lock(&zcrypt_list_lock); |
| local_bh_disable(); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| spin_lock(&zq->queue->lock); |
| qdepth[AP_QID_CARD(zq->queue->qid)] = |
| zq->queue->pendingq_count + |
| zq->queue->requestq_count; |
| spin_unlock(&zq->queue->lock); |
| } |
| } |
| local_bh_enable(); |
| spin_unlock(&zcrypt_list_lock); |
| } |
| |
| static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES]) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| |
| memset(reqcnt, 0, sizeof(int) * AP_DEVICES); |
| spin_lock(&zcrypt_list_lock); |
| local_bh_disable(); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| spin_lock(&zq->queue->lock); |
| reqcnt[AP_QID_CARD(zq->queue->qid)] = |
| zq->queue->total_request_count; |
| spin_unlock(&zq->queue->lock); |
| } |
| } |
| local_bh_enable(); |
| spin_unlock(&zcrypt_list_lock); |
| } |
| |
| static int zcrypt_pendingq_count(void) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| int pendingq_count; |
| |
| pendingq_count = 0; |
| spin_lock(&zcrypt_list_lock); |
| local_bh_disable(); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| spin_lock(&zq->queue->lock); |
| pendingq_count += zq->queue->pendingq_count; |
| spin_unlock(&zq->queue->lock); |
| } |
| } |
| local_bh_enable(); |
| spin_unlock(&zcrypt_list_lock); |
| return pendingq_count; |
| } |
| |
| static int zcrypt_requestq_count(void) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| int requestq_count; |
| |
| requestq_count = 0; |
| spin_lock(&zcrypt_list_lock); |
| local_bh_disable(); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| spin_lock(&zq->queue->lock); |
| requestq_count += zq->queue->requestq_count; |
| spin_unlock(&zq->queue->lock); |
| } |
| } |
| local_bh_enable(); |
| spin_unlock(&zcrypt_list_lock); |
| return requestq_count; |
| } |
| |
| static int zcrypt_count_type(int type) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| int device_count; |
| |
| device_count = 0; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| if (zc->card->id != type) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| device_count++; |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| return device_count; |
| } |
| |
| /** |
| * zcrypt_ica_status(): Old, depracted combi status call. |
| * |
| * Old, deprecated combi status call. |
| */ |
| static long zcrypt_ica_status(struct file *filp, unsigned long arg) |
| { |
| struct ica_z90_status *pstat; |
| int ret; |
| |
| pstat = kzalloc(sizeof(*pstat), GFP_KERNEL); |
| if (!pstat) |
| return -ENOMEM; |
| pstat->totalcount = zcrypt_device_count; |
| pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA); |
| pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC); |
| pstat->requestqWaitCount = zcrypt_requestq_count(); |
| pstat->pendingqWaitCount = zcrypt_pendingq_count(); |
| pstat->totalOpenCount = atomic_read(&zcrypt_open_count); |
| pstat->cryptoDomain = ap_domain_index; |
| zcrypt_status_mask(pstat->status); |
| zcrypt_qdepth_mask(pstat->qdepth); |
| ret = 0; |
| if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat))) |
| ret = -EFAULT; |
| kfree(pstat); |
| return ret; |
| } |
| |
| static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| int rc; |
| |
| switch (cmd) { |
| case ICARSAMODEXPO: { |
| struct ica_rsa_modexpo __user *umex = (void __user *) arg; |
| struct ica_rsa_modexpo mex; |
| if (copy_from_user(&mex, umex, sizeof(mex))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_rsa_modexpo(&mex); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_modexpo(&mex); |
| } while (rc == -EAGAIN); |
| if (rc) { |
| ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc); |
| return rc; |
| } |
| return put_user(mex.outputdatalength, &umex->outputdatalength); |
| } |
| case ICARSACRT: { |
| struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; |
| struct ica_rsa_modexpo_crt crt; |
| if (copy_from_user(&crt, ucrt, sizeof(crt))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_rsa_crt(&crt); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_crt(&crt); |
| } while (rc == -EAGAIN); |
| if (rc) { |
| ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc); |
| return rc; |
| } |
| return put_user(crt.outputdatalength, &ucrt->outputdatalength); |
| } |
| case ZSECSENDCPRB: { |
| struct ica_xcRB __user *uxcRB = (void __user *) arg; |
| struct ica_xcRB xcRB; |
| if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_send_cprb(&xcRB); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_send_cprb(&xcRB); |
| } while (rc == -EAGAIN); |
| if (rc) |
| ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc); |
| if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) |
| return -EFAULT; |
| return rc; |
| } |
| case ZSENDEP11CPRB: { |
| struct ep11_urb __user *uxcrb = (void __user *)arg; |
| struct ep11_urb xcrb; |
| if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_send_ep11_cprb(&xcrb); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_send_ep11_cprb(&xcrb); |
| } while (rc == -EAGAIN); |
| if (rc) |
| ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc); |
| if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) |
| return -EFAULT; |
| return rc; |
| } |
| case ZDEVICESTATUS: { |
| struct zcrypt_device_matrix *device_status; |
| |
| device_status = kzalloc(sizeof(struct zcrypt_device_matrix), |
| GFP_KERNEL); |
| if (!device_status) |
| return -ENOMEM; |
| |
| zcrypt_device_status_mask(device_status); |
| |
| if (copy_to_user((char __user *) arg, device_status, |
| sizeof(struct zcrypt_device_matrix))) { |
| kfree(device_status); |
| return -EFAULT; |
| } |
| |
| kfree(device_status); |
| return 0; |
| } |
| case Z90STAT_STATUS_MASK: { |
| char status[AP_DEVICES]; |
| zcrypt_status_mask(status); |
| if (copy_to_user((char __user *) arg, status, |
| sizeof(char) * AP_DEVICES)) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_QDEPTH_MASK: { |
| char qdepth[AP_DEVICES]; |
| zcrypt_qdepth_mask(qdepth); |
| if (copy_to_user((char __user *) arg, qdepth, |
| sizeof(char) * AP_DEVICES)) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_PERDEV_REQCNT: { |
| int reqcnt[AP_DEVICES]; |
| zcrypt_perdev_reqcnt(reqcnt); |
| if (copy_to_user((int __user *) arg, reqcnt, |
| sizeof(int) * AP_DEVICES)) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_REQUESTQ_COUNT: |
| return put_user(zcrypt_requestq_count(), (int __user *) arg); |
| case Z90STAT_PENDINGQ_COUNT: |
| return put_user(zcrypt_pendingq_count(), (int __user *) arg); |
| case Z90STAT_TOTALOPEN_COUNT: |
| return put_user(atomic_read(&zcrypt_open_count), |
| (int __user *) arg); |
| case Z90STAT_DOMAIN_INDEX: |
| return put_user(ap_domain_index, (int __user *) arg); |
| /* |
| * Deprecated ioctls. Don't add another device count ioctl, |
| * you can count them yourself in the user space with the |
| * output of the Z90STAT_STATUS_MASK ioctl. |
| */ |
| case ICAZ90STATUS: |
| return zcrypt_ica_status(filp, arg); |
| case Z90STAT_TOTALCOUNT: |
| return put_user(zcrypt_device_count, (int __user *) arg); |
| case Z90STAT_PCICACOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCICA), |
| (int __user *) arg); |
| case Z90STAT_PCICCCOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCICC), |
| (int __user *) arg); |
| case Z90STAT_PCIXCCMCL2COUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2), |
| (int __user *) arg); |
| case Z90STAT_PCIXCCMCL3COUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), |
| (int __user *) arg); |
| case Z90STAT_PCIXCCCOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) + |
| zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), |
| (int __user *) arg); |
| case Z90STAT_CEX2CCOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_CEX2C), |
| (int __user *) arg); |
| case Z90STAT_CEX2ACOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_CEX2A), |
| (int __user *) arg); |
| default: |
| /* unknown ioctl number */ |
| return -ENOIOCTLCMD; |
| } |
| } |
| |
| #ifdef CONFIG_COMPAT |
| /* |
| * ioctl32 conversion routines |
| */ |
| struct compat_ica_rsa_modexpo { |
| compat_uptr_t inputdata; |
| unsigned int inputdatalength; |
| compat_uptr_t outputdata; |
| unsigned int outputdatalength; |
| compat_uptr_t b_key; |
| compat_uptr_t n_modulus; |
| }; |
| |
| static long trans_modexpo32(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); |
| struct compat_ica_rsa_modexpo mex32; |
| struct ica_rsa_modexpo mex64; |
| long rc; |
| |
| if (copy_from_user(&mex32, umex32, sizeof(mex32))) |
| return -EFAULT; |
| mex64.inputdata = compat_ptr(mex32.inputdata); |
| mex64.inputdatalength = mex32.inputdatalength; |
| mex64.outputdata = compat_ptr(mex32.outputdata); |
| mex64.outputdatalength = mex32.outputdatalength; |
| mex64.b_key = compat_ptr(mex32.b_key); |
| mex64.n_modulus = compat_ptr(mex32.n_modulus); |
| do { |
| rc = zcrypt_rsa_modexpo(&mex64); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_modexpo(&mex64); |
| } while (rc == -EAGAIN); |
| if (rc) |
| return rc; |
| return put_user(mex64.outputdatalength, |
| &umex32->outputdatalength); |
| } |
| |
| struct compat_ica_rsa_modexpo_crt { |
| compat_uptr_t inputdata; |
| unsigned int inputdatalength; |
| compat_uptr_t outputdata; |
| unsigned int outputdatalength; |
| compat_uptr_t bp_key; |
| compat_uptr_t bq_key; |
| compat_uptr_t np_prime; |
| compat_uptr_t nq_prime; |
| compat_uptr_t u_mult_inv; |
| }; |
| |
| static long trans_modexpo_crt32(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); |
| struct compat_ica_rsa_modexpo_crt crt32; |
| struct ica_rsa_modexpo_crt crt64; |
| long rc; |
| |
| if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) |
| return -EFAULT; |
| crt64.inputdata = compat_ptr(crt32.inputdata); |
| crt64.inputdatalength = crt32.inputdatalength; |
| crt64.outputdata= compat_ptr(crt32.outputdata); |
| crt64.outputdatalength = crt32.outputdatalength; |
| crt64.bp_key = compat_ptr(crt32.bp_key); |
| crt64.bq_key = compat_ptr(crt32.bq_key); |
| crt64.np_prime = compat_ptr(crt32.np_prime); |
| crt64.nq_prime = compat_ptr(crt32.nq_prime); |
| crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); |
| do { |
| rc = zcrypt_rsa_crt(&crt64); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_crt(&crt64); |
| } while (rc == -EAGAIN); |
| if (rc) |
| return rc; |
| return put_user(crt64.outputdatalength, |
| &ucrt32->outputdatalength); |
| } |
| |
| struct compat_ica_xcRB { |
| unsigned short agent_ID; |
| unsigned int user_defined; |
| unsigned short request_ID; |
| unsigned int request_control_blk_length; |
| unsigned char padding1[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t request_control_blk_addr; |
| unsigned int request_data_length; |
| char padding2[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t request_data_address; |
| unsigned int reply_control_blk_length; |
| char padding3[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t reply_control_blk_addr; |
| unsigned int reply_data_length; |
| char padding4[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t reply_data_addr; |
| unsigned short priority_window; |
| unsigned int status; |
| } __attribute__((packed)); |
| |
| static long trans_xcRB32(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); |
| struct compat_ica_xcRB xcRB32; |
| struct ica_xcRB xcRB64; |
| long rc; |
| |
| if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) |
| return -EFAULT; |
| xcRB64.agent_ID = xcRB32.agent_ID; |
| xcRB64.user_defined = xcRB32.user_defined; |
| xcRB64.request_ID = xcRB32.request_ID; |
| xcRB64.request_control_blk_length = |
| xcRB32.request_control_blk_length; |
| xcRB64.request_control_blk_addr = |
| compat_ptr(xcRB32.request_control_blk_addr); |
| xcRB64.request_data_length = |
| xcRB32.request_data_length; |
| xcRB64.request_data_address = |
| compat_ptr(xcRB32.request_data_address); |
| xcRB64.reply_control_blk_length = |
| xcRB32.reply_control_blk_length; |
| xcRB64.reply_control_blk_addr = |
| compat_ptr(xcRB32.reply_control_blk_addr); |
| xcRB64.reply_data_length = xcRB32.reply_data_length; |
| xcRB64.reply_data_addr = |
| compat_ptr(xcRB32.reply_data_addr); |
| xcRB64.priority_window = xcRB32.priority_window; |
| xcRB64.status = xcRB32.status; |
| do { |
| rc = zcrypt_send_cprb(&xcRB64); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_send_cprb(&xcRB64); |
| } while (rc == -EAGAIN); |
| xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; |
| xcRB32.reply_data_length = xcRB64.reply_data_length; |
| xcRB32.status = xcRB64.status; |
| if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) |
| return -EFAULT; |
| return rc; |
| } |
| |
| static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| if (cmd == ICARSAMODEXPO) |
| return trans_modexpo32(filp, cmd, arg); |
| if (cmd == ICARSACRT) |
| return trans_modexpo_crt32(filp, cmd, arg); |
| if (cmd == ZSECSENDCPRB) |
| return trans_xcRB32(filp, cmd, arg); |
| return zcrypt_unlocked_ioctl(filp, cmd, arg); |
| } |
| #endif |
| |
| /* |
| * Misc device file operations. |
| */ |
| static const struct file_operations zcrypt_fops = { |
| .owner = THIS_MODULE, |
| .read = zcrypt_read, |
| .write = zcrypt_write, |
| .unlocked_ioctl = zcrypt_unlocked_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = zcrypt_compat_ioctl, |
| #endif |
| .open = zcrypt_open, |
| .release = zcrypt_release, |
| .llseek = no_llseek, |
| }; |
| |
| /* |
| * Misc device. |
| */ |
| static struct miscdevice zcrypt_misc_device = { |
| .minor = MISC_DYNAMIC_MINOR, |
| .name = "z90crypt", |
| .fops = &zcrypt_fops, |
| }; |
| |
| /* |
| * Deprecated /proc entry support. |
| */ |
| static struct proc_dir_entry *zcrypt_entry; |
| |
| static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len) |
| { |
| int i; |
| |
| for (i = 0; i < len; i++) |
| seq_printf(m, "%01x", (unsigned int) addr[i]); |
| seq_putc(m, ' '); |
| } |
| |
| static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len) |
| { |
| int inl, c, cx; |
| |
| seq_printf(m, " "); |
| inl = 0; |
| for (c = 0; c < (len / 16); c++) { |
| sprintcl(m, addr+inl, 16); |
| inl += 16; |
| } |
| cx = len%16; |
| if (cx) { |
| sprintcl(m, addr+inl, cx); |
| inl += cx; |
| } |
| seq_putc(m, '\n'); |
| } |
| |
| static void sprinthx(unsigned char *title, struct seq_file *m, |
| unsigned char *addr, unsigned int len) |
| { |
| int inl, r, rx; |
| |
| seq_printf(m, "\n%s\n", title); |
| inl = 0; |
| for (r = 0; r < (len / 64); r++) { |
| sprintrw(m, addr+inl, 64); |
| inl += 64; |
| } |
| rx = len % 64; |
| if (rx) { |
| sprintrw(m, addr+inl, rx); |
| inl += rx; |
| } |
| seq_putc(m, '\n'); |
| } |
| |
| static void sprinthx4(unsigned char *title, struct seq_file *m, |
| unsigned int *array, unsigned int len) |
| { |
| seq_printf(m, "\n%s\n", title); |
| seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, array, len, false); |
| seq_putc(m, '\n'); |
| } |
| |
| static int zcrypt_proc_show(struct seq_file *m, void *v) |
| { |
| char workarea[sizeof(int) * AP_DEVICES]; |
| |
| seq_printf(m, "\nzcrypt version: %d.%d.%d\n", |
| ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT); |
| seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index); |
| seq_printf(m, "Total device count: %d\n", zcrypt_device_count); |
| seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA)); |
| seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC)); |
| seq_printf(m, "PCIXCC MCL2 count: %d\n", |
| zcrypt_count_type(ZCRYPT_PCIXCC_MCL2)); |
| seq_printf(m, "PCIXCC MCL3 count: %d\n", |
| zcrypt_count_type(ZCRYPT_PCIXCC_MCL3)); |
| seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C)); |
| seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A)); |
| seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C)); |
| seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A)); |
| seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count()); |
| seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count()); |
| seq_printf(m, "Total open handles: %d\n\n", |
| atomic_read(&zcrypt_open_count)); |
| zcrypt_status_mask(workarea); |
| sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) " |
| "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A", |
| m, workarea, AP_DEVICES); |
| zcrypt_qdepth_mask(workarea); |
| sprinthx("Waiting work element counts", m, workarea, AP_DEVICES); |
| zcrypt_perdev_reqcnt((int *) workarea); |
| sprinthx4("Per-device successfully completed request counts", |
| m, (unsigned int *) workarea, AP_DEVICES); |
| return 0; |
| } |
| |
| static int zcrypt_proc_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, zcrypt_proc_show, NULL); |
| } |
| |
| static void zcrypt_disable_card(int index) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| zq->online = 0; |
| ap_flush_queue(zq->queue); |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| } |
| |
| static void zcrypt_enable_card(int index) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) |
| continue; |
| zq->online = 1; |
| ap_flush_queue(zq->queue); |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| } |
| |
| static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer, |
| size_t count, loff_t *pos) |
| { |
| unsigned char *lbuf, *ptr; |
| size_t local_count; |
| int j; |
| |
| if (count <= 0) |
| return 0; |
| |
| #define LBUFSIZE 1200UL |
| lbuf = kmalloc(LBUFSIZE, GFP_KERNEL); |
| if (!lbuf) |
| return 0; |
| |
| local_count = min(LBUFSIZE - 1, count); |
| if (copy_from_user(lbuf, buffer, local_count) != 0) { |
| kfree(lbuf); |
| return -EFAULT; |
| } |
| lbuf[local_count] = '\0'; |
| |
| ptr = strstr(lbuf, "Online devices"); |
| if (!ptr) |
| goto out; |
| ptr = strstr(ptr, "\n"); |
| if (!ptr) |
| goto out; |
| ptr++; |
| |
| if (strstr(ptr, "Waiting work element counts") == NULL) |
| goto out; |
| |
| for (j = 0; j < 64 && *ptr; ptr++) { |
| /* |
| * '0' for no device, '1' for PCICA, '2' for PCICC, |
| * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3, |
| * '5' for CEX2C and '6' for CEX2A' |
| * '7' for CEX3C and '8' for CEX3A |
| */ |
| if (*ptr >= '0' && *ptr <= '8') |
| j++; |
| else if (*ptr == 'd' || *ptr == 'D') |
| zcrypt_disable_card(j++); |
| else if (*ptr == 'e' || *ptr == 'E') |
| zcrypt_enable_card(j++); |
| else if (*ptr != ' ' && *ptr != '\t') |
| break; |
| } |
| out: |
| kfree(lbuf); |
| return count; |
| } |
| |
| static const struct file_operations zcrypt_proc_fops = { |
| .owner = THIS_MODULE, |
| .open = zcrypt_proc_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| .write = zcrypt_proc_write, |
| }; |
| |
| static int zcrypt_rng_device_count; |
| static u32 *zcrypt_rng_buffer; |
| static int zcrypt_rng_buffer_index; |
| static DEFINE_MUTEX(zcrypt_rng_mutex); |
| |
| static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) |
| { |
| int rc; |
| |
| /* |
| * We don't need locking here because the RNG API guarantees serialized |
| * read method calls. |
| */ |
| if (zcrypt_rng_buffer_index == 0) { |
| rc = zcrypt_rng((char *) zcrypt_rng_buffer); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| rc = zcrypt_rng((char *) zcrypt_rng_buffer); |
| if (rc < 0) |
| return -EIO; |
| zcrypt_rng_buffer_index = rc / sizeof *data; |
| } |
| *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; |
| return sizeof *data; |
| } |
| |
| static struct hwrng zcrypt_rng_dev = { |
| .name = "zcrypt", |
| .data_read = zcrypt_rng_data_read, |
| .quality = 990, |
| }; |
| |
| int zcrypt_rng_device_add(void) |
| { |
| int rc = 0; |
| |
| mutex_lock(&zcrypt_rng_mutex); |
| if (zcrypt_rng_device_count == 0) { |
| zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); |
| if (!zcrypt_rng_buffer) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| zcrypt_rng_buffer_index = 0; |
| if (!zcrypt_hwrng_seed) |
| zcrypt_rng_dev.quality = 0; |
| rc = hwrng_register(&zcrypt_rng_dev); |
| if (rc) |
| goto out_free; |
| zcrypt_rng_device_count = 1; |
| } else |
| zcrypt_rng_device_count++; |
| mutex_unlock(&zcrypt_rng_mutex); |
| return 0; |
| |
| out_free: |
| free_page((unsigned long) zcrypt_rng_buffer); |
| out: |
| mutex_unlock(&zcrypt_rng_mutex); |
| return rc; |
| } |
| |
| void zcrypt_rng_device_remove(void) |
| { |
| mutex_lock(&zcrypt_rng_mutex); |
| zcrypt_rng_device_count--; |
| if (zcrypt_rng_device_count == 0) { |
| hwrng_unregister(&zcrypt_rng_dev); |
| free_page((unsigned long) zcrypt_rng_buffer); |
| } |
| mutex_unlock(&zcrypt_rng_mutex); |
| } |
| |
| int __init zcrypt_debug_init(void) |
| { |
| zcrypt_dbf_info = debug_register("zcrypt", 1, 1, |
| DBF_MAX_SPRINTF_ARGS * sizeof(long)); |
| debug_register_view(zcrypt_dbf_info, &debug_sprintf_view); |
| debug_set_level(zcrypt_dbf_info, DBF_ERR); |
| |
| return 0; |
| } |
| |
| void zcrypt_debug_exit(void) |
| { |
| debug_unregister(zcrypt_dbf_info); |
| } |
| |
| /** |
| * zcrypt_api_init(): Module initialization. |
| * |
| * The module initialization code. |
| */ |
| int __init zcrypt_api_init(void) |
| { |
| int rc; |
| |
| rc = zcrypt_debug_init(); |
| if (rc) |
| goto out; |
| |
| atomic_set(&zcrypt_rescan_req, 0); |
| |
| /* Register the request sprayer. */ |
| rc = misc_register(&zcrypt_misc_device); |
| if (rc < 0) |
| goto out; |
| |
| /* Set up the proc file system */ |
| zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL, |
| &zcrypt_proc_fops); |
| if (!zcrypt_entry) { |
| rc = -ENOMEM; |
| goto out_misc; |
| } |
| |
| zcrypt_msgtype6_init(); |
| zcrypt_msgtype50_init(); |
| return 0; |
| |
| out_misc: |
| misc_deregister(&zcrypt_misc_device); |
| out: |
| return rc; |
| } |
| |
| /** |
| * zcrypt_api_exit(): Module termination. |
| * |
| * The module termination code. |
| */ |
| void __exit zcrypt_api_exit(void) |
| { |
| remove_proc_entry("driver/z90crypt", NULL); |
| misc_deregister(&zcrypt_misc_device); |
| zcrypt_msgtype6_exit(); |
| zcrypt_msgtype50_exit(); |
| zcrypt_debug_exit(); |
| } |
| |
| module_init(zcrypt_api_init); |
| module_exit(zcrypt_api_exit); |