| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright IBM Corp. 2001, 2018 |
| * 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> |
| * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/miscdevice.h> |
| #include <linux/fs.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 <linux/cdev.h> |
| #include <linux/ctype.h> |
| #include <linux/capability.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" |
| #include "zcrypt_ccamisc.h" |
| #include "zcrypt_ep11misc.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); |
| |
| DEFINE_SPINLOCK(zcrypt_list_lock); |
| LIST_HEAD(zcrypt_card_list); |
| |
| 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_INFO("%s rescan count=%07d\n", __func__, |
| 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); |
| |
| /* |
| * Multi device nodes extension functions. |
| */ |
| |
| struct zcdn_device; |
| |
| static struct class *zcrypt_class; |
| static dev_t zcrypt_devt; |
| static struct cdev zcrypt_cdev; |
| |
| struct zcdn_device { |
| struct device device; |
| struct ap_perms perms; |
| }; |
| |
| #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device) |
| |
| #define ZCDN_MAX_NAME 32 |
| |
| static int zcdn_create(const char *name); |
| static int zcdn_destroy(const char *name); |
| |
| /* |
| * Find zcdn device by name. |
| * Returns reference to the zcdn device which needs to be released |
| * with put_device() after use. |
| */ |
| static inline struct zcdn_device *find_zcdndev_by_name(const char *name) |
| { |
| struct device *dev = class_find_device_by_name(zcrypt_class, name); |
| |
| return dev ? to_zcdn_dev(dev) : NULL; |
| } |
| |
| /* |
| * Find zcdn device by devt value. |
| * Returns reference to the zcdn device which needs to be released |
| * with put_device() after use. |
| */ |
| static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt) |
| { |
| struct device *dev = class_find_device_by_devt(zcrypt_class, devt); |
| |
| return dev ? to_zcdn_dev(dev) : NULL; |
| } |
| |
| static ssize_t ioctlmask_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| int i, n; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| |
| n = sysfs_emit(buf, "0x"); |
| for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++) |
| n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]); |
| n += sysfs_emit_at(buf, n, "\n"); |
| |
| mutex_unlock(&ap_perms_mutex); |
| |
| return n; |
| } |
| |
| static ssize_t ioctlmask_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| |
| rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm, |
| AP_IOCTLS, &ap_perms_mutex); |
| if (rc) |
| return rc; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR_RW(ioctlmask); |
| |
| static ssize_t apmask_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| int i, n; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| |
| n = sysfs_emit(buf, "0x"); |
| for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++) |
| n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]); |
| n += sysfs_emit_at(buf, n, "\n"); |
| |
| mutex_unlock(&ap_perms_mutex); |
| |
| return n; |
| } |
| |
| static ssize_t apmask_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| |
| rc = ap_parse_mask_str(buf, zcdndev->perms.apm, |
| AP_DEVICES, &ap_perms_mutex); |
| if (rc) |
| return rc; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR_RW(apmask); |
| |
| static ssize_t aqmask_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| int i, n; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| |
| n = sysfs_emit(buf, "0x"); |
| for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++) |
| n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]); |
| n += sysfs_emit_at(buf, n, "\n"); |
| |
| mutex_unlock(&ap_perms_mutex); |
| |
| return n; |
| } |
| |
| static ssize_t aqmask_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| |
| rc = ap_parse_mask_str(buf, zcdndev->perms.aqm, |
| AP_DOMAINS, &ap_perms_mutex); |
| if (rc) |
| return rc; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR_RW(aqmask); |
| |
| static ssize_t admask_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| int i, n; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| |
| n = sysfs_emit(buf, "0x"); |
| for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++) |
| n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]); |
| n += sysfs_emit_at(buf, n, "\n"); |
| |
| mutex_unlock(&ap_perms_mutex); |
| |
| return n; |
| } |
| |
| static ssize_t admask_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| |
| rc = ap_parse_mask_str(buf, zcdndev->perms.adm, |
| AP_DOMAINS, &ap_perms_mutex); |
| if (rc) |
| return rc; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR_RW(admask); |
| |
| static struct attribute *zcdn_dev_attrs[] = { |
| &dev_attr_ioctlmask.attr, |
| &dev_attr_apmask.attr, |
| &dev_attr_aqmask.attr, |
| &dev_attr_admask.attr, |
| NULL |
| }; |
| |
| static struct attribute_group zcdn_dev_attr_group = { |
| .attrs = zcdn_dev_attrs |
| }; |
| |
| static const struct attribute_group *zcdn_dev_attr_groups[] = { |
| &zcdn_dev_attr_group, |
| NULL |
| }; |
| |
| static ssize_t zcdn_create_store(const struct class *class, |
| const struct class_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| char name[ZCDN_MAX_NAME]; |
| |
| strscpy(name, skip_spaces(buf), sizeof(name)); |
| |
| rc = zcdn_create(strim(name)); |
| |
| return rc ? rc : count; |
| } |
| |
| static const struct class_attribute class_attr_zcdn_create = |
| __ATTR(create, 0600, NULL, zcdn_create_store); |
| |
| static ssize_t zcdn_destroy_store(const struct class *class, |
| const struct class_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| char name[ZCDN_MAX_NAME]; |
| |
| strscpy(name, skip_spaces(buf), sizeof(name)); |
| |
| rc = zcdn_destroy(strim(name)); |
| |
| return rc ? rc : count; |
| } |
| |
| static const struct class_attribute class_attr_zcdn_destroy = |
| __ATTR(destroy, 0600, NULL, zcdn_destroy_store); |
| |
| static void zcdn_device_release(struct device *dev) |
| { |
| struct zcdn_device *zcdndev = to_zcdn_dev(dev); |
| |
| ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n", |
| __func__, MAJOR(dev->devt), MINOR(dev->devt)); |
| |
| kfree(zcdndev); |
| } |
| |
| static int zcdn_create(const char *name) |
| { |
| dev_t devt; |
| int i, rc = 0; |
| struct zcdn_device *zcdndev; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| |
| /* check if device node with this name already exists */ |
| if (name[0]) { |
| zcdndev = find_zcdndev_by_name(name); |
| if (zcdndev) { |
| put_device(&zcdndev->device); |
| rc = -EEXIST; |
| goto unlockout; |
| } |
| } |
| |
| /* find an unused minor number */ |
| for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { |
| devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); |
| zcdndev = find_zcdndev_by_devt(devt); |
| if (zcdndev) |
| put_device(&zcdndev->device); |
| else |
| break; |
| } |
| if (i == ZCRYPT_MAX_MINOR_NODES) { |
| rc = -ENOSPC; |
| goto unlockout; |
| } |
| |
| /* alloc and prepare a new zcdn device */ |
| zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL); |
| if (!zcdndev) { |
| rc = -ENOMEM; |
| goto unlockout; |
| } |
| zcdndev->device.release = zcdn_device_release; |
| zcdndev->device.class = zcrypt_class; |
| zcdndev->device.devt = devt; |
| zcdndev->device.groups = zcdn_dev_attr_groups; |
| if (name[0]) |
| rc = dev_set_name(&zcdndev->device, "%s", name); |
| else |
| rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt)); |
| if (rc) { |
| kfree(zcdndev); |
| goto unlockout; |
| } |
| rc = device_register(&zcdndev->device); |
| if (rc) { |
| put_device(&zcdndev->device); |
| goto unlockout; |
| } |
| |
| ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n", |
| __func__, MAJOR(devt), MINOR(devt)); |
| |
| unlockout: |
| mutex_unlock(&ap_perms_mutex); |
| return rc; |
| } |
| |
| static int zcdn_destroy(const char *name) |
| { |
| int rc = 0; |
| struct zcdn_device *zcdndev; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| |
| /* try to find this zcdn device */ |
| zcdndev = find_zcdndev_by_name(name); |
| if (!zcdndev) { |
| rc = -ENOENT; |
| goto unlockout; |
| } |
| |
| /* |
| * The zcdn device is not hard destroyed. It is subject to |
| * reference counting and thus just needs to be unregistered. |
| */ |
| put_device(&zcdndev->device); |
| device_unregister(&zcdndev->device); |
| |
| unlockout: |
| mutex_unlock(&ap_perms_mutex); |
| return rc; |
| } |
| |
| static void zcdn_destroy_all(void) |
| { |
| int i; |
| dev_t devt; |
| struct zcdn_device *zcdndev; |
| |
| mutex_lock(&ap_perms_mutex); |
| for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { |
| devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); |
| zcdndev = find_zcdndev_by_devt(devt); |
| if (zcdndev) { |
| put_device(&zcdndev->device); |
| device_unregister(&zcdndev->device); |
| } |
| } |
| mutex_unlock(&ap_perms_mutex); |
| } |
| |
| /* |
| * 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 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) |
| { |
| struct ap_perms *perms = &ap_perms; |
| |
| if (filp->f_inode->i_cdev == &zcrypt_cdev) { |
| struct zcdn_device *zcdndev; |
| |
| if (mutex_lock_interruptible(&ap_perms_mutex)) |
| return -ERESTARTSYS; |
| zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); |
| /* find returns a reference, no get_device() needed */ |
| mutex_unlock(&ap_perms_mutex); |
| if (zcdndev) |
| perms = &zcdndev->perms; |
| } |
| filp->private_data = (void *)perms; |
| |
| atomic_inc(&zcrypt_open_count); |
| return stream_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) |
| { |
| if (filp->f_inode->i_cdev == &zcrypt_cdev) { |
| struct zcdn_device *zcdndev; |
| |
| mutex_lock(&ap_perms_mutex); |
| zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); |
| mutex_unlock(&ap_perms_mutex); |
| if (zcdndev) { |
| /* 2 puts here: one for find, one for open */ |
| put_device(&zcdndev->device); |
| put_device(&zcdndev->device); |
| } |
| } |
| |
| atomic_dec(&zcrypt_open_count); |
| return 0; |
| } |
| |
| static inline int zcrypt_check_ioctl(struct ap_perms *perms, |
| unsigned int cmd) |
| { |
| int rc = -EPERM; |
| int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT; |
| |
| if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) { |
| if (test_bit_inv(ioctlnr, perms->ioctlm)) |
| rc = 0; |
| } |
| |
| if (rc) |
| ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n", |
| __func__, ioctlnr, rc); |
| |
| return rc; |
| } |
| |
| static inline bool zcrypt_check_card(struct ap_perms *perms, int card) |
| { |
| return test_bit_inv(card, perms->apm) ? true : false; |
| } |
| |
| static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue) |
| { |
| return test_bit_inv(queue, perms->aqm) ? true : false; |
| } |
| |
| static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc, |
| struct zcrypt_queue *zq, |
| struct module **pmod, |
| unsigned int weight) |
| { |
| if (!zq || !try_module_get(zq->queue->ap_dev.device.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++; |
| *pmod = zq->queue->ap_dev.device.driver->owner; |
| return zq; |
| } |
| |
| static inline void zcrypt_drop_queue(struct zcrypt_card *zc, |
| struct zcrypt_queue *zq, |
| struct module *mod, |
| unsigned int weight) |
| { |
| 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 int weight, |
| unsigned int pref_weight) |
| { |
| if (!pref_zc) |
| return true; |
| weight += atomic_read(&zc->load); |
| pref_weight += atomic_read(&pref_zc->load); |
| if (weight == pref_weight) |
| return atomic64_read(&zc->card->total_request_count) < |
| atomic64_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 int weight, |
| unsigned int pref_weight) |
| { |
| if (!pref_zq) |
| return true; |
| 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 ap_perms *perms, |
| struct zcrypt_track *tr, |
| struct ica_rsa_modexpo *mex) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| struct ap_message ap_msg; |
| unsigned int wgt = 0, pref_wgt = 0; |
| unsigned int func_code; |
| int cpen, qpen, qid = 0, rc = -ENODEV; |
| struct module *mod; |
| |
| trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO); |
| |
| ap_init_message(&ap_msg); |
| |
| if (mex->outputdatalength < mex->inputdatalength) { |
| func_code = 0; |
| 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 usable accelerator or CCA card */ |
| if (!zc->online || !zc->card->config || zc->card->chkstop || |
| !(zc->card->functions & 0x18000000)) |
| continue; |
| /* Check for size limits */ |
| if (zc->min_mod_size > mex->inputdatalength || |
| zc->max_mod_size < mex->inputdatalength) |
| continue; |
| /* check if device node has admission for this card */ |
| if (!zcrypt_check_card(perms, zc->card->id)) |
| continue; |
| /* get weight index of the card device */ |
| wgt = zc->speed_rating[func_code]; |
| /* penalty if this msg was previously sent via this card */ |
| cpen = (tr && tr->again_counter && tr->last_qid && |
| AP_QID_CARD(tr->last_qid) == zc->card->id) ? |
| TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; |
| if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is usable and eligible */ |
| if (!zq->online || !zq->ops->rsa_modexpo || |
| !zq->queue->config || zq->queue->chkstop) |
| continue; |
| /* check if device node has admission for this queue */ |
| if (!zcrypt_check_queue(perms, |
| AP_QID_QUEUE(zq->queue->qid))) |
| continue; |
| /* penalty if the msg was previously sent at this qid */ |
| qpen = (tr && tr->again_counter && tr->last_qid && |
| tr->last_qid == zq->queue->qid) ? |
| TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; |
| if (!zcrypt_queue_compare(zq, pref_zq, |
| wgt + cpen + qpen, pref_wgt)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_wgt = wgt + cpen + qpen; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n", |
| __func__); |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| ap_release_message(&ap_msg); |
| if (tr) { |
| tr->last_rc = rc; |
| tr->last_qid = qid; |
| } |
| trace_s390_zcrypt_rep(mex, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| static long zcrypt_rsa_crt(struct ap_perms *perms, |
| struct zcrypt_track *tr, |
| struct ica_rsa_modexpo_crt *crt) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| struct ap_message ap_msg; |
| unsigned int wgt = 0, pref_wgt = 0; |
| unsigned int func_code; |
| int cpen, qpen, qid = 0, rc = -ENODEV; |
| struct module *mod; |
| |
| trace_s390_zcrypt_req(crt, TP_ICARSACRT); |
| |
| ap_init_message(&ap_msg); |
| |
| if (crt->outputdatalength < crt->inputdatalength) { |
| func_code = 0; |
| 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 usable accelerator or CCA card */ |
| if (!zc->online || !zc->card->config || zc->card->chkstop || |
| !(zc->card->functions & 0x18000000)) |
| continue; |
| /* Check for size limits */ |
| if (zc->min_mod_size > crt->inputdatalength || |
| zc->max_mod_size < crt->inputdatalength) |
| continue; |
| /* check if device node has admission for this card */ |
| if (!zcrypt_check_card(perms, zc->card->id)) |
| continue; |
| /* get weight index of the card device */ |
| wgt = zc->speed_rating[func_code]; |
| /* penalty if this msg was previously sent via this card */ |
| cpen = (tr && tr->again_counter && tr->last_qid && |
| AP_QID_CARD(tr->last_qid) == zc->card->id) ? |
| TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; |
| if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is usable and eligible */ |
| if (!zq->online || !zq->ops->rsa_modexpo_crt || |
| !zq->queue->config || zq->queue->chkstop) |
| continue; |
| /* check if device node has admission for this queue */ |
| if (!zcrypt_check_queue(perms, |
| AP_QID_QUEUE(zq->queue->qid))) |
| continue; |
| /* penalty if the msg was previously sent at this qid */ |
| qpen = (tr && tr->again_counter && tr->last_qid && |
| tr->last_qid == zq->queue->qid) ? |
| TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; |
| if (!zcrypt_queue_compare(zq, pref_zq, |
| wgt + cpen + qpen, pref_wgt)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_wgt = wgt + cpen + qpen; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n", |
| __func__); |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| ap_release_message(&ap_msg); |
| if (tr) { |
| tr->last_rc = rc; |
| tr->last_qid = qid; |
| } |
| trace_s390_zcrypt_rep(crt, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms, |
| struct zcrypt_track *tr, |
| struct ica_xcRB *xcrb) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| struct ap_message ap_msg; |
| unsigned int wgt = 0, pref_wgt = 0; |
| unsigned int func_code; |
| unsigned short *domain, tdom; |
| int cpen, qpen, qid = 0, rc = -ENODEV; |
| struct module *mod; |
| |
| trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB); |
| |
| xcrb->status = 0; |
| ap_init_message(&ap_msg); |
| |
| rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain); |
| if (rc) |
| goto out; |
| |
| tdom = *domain; |
| if (perms != &ap_perms && tdom < AP_DOMAINS) { |
| if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { |
| if (!test_bit_inv(tdom, perms->adm)) { |
| rc = -ENODEV; |
| goto out; |
| } |
| } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) { |
| rc = -EOPNOTSUPP; |
| goto out; |
| } |
| } |
| /* |
| * If a valid target domain is set and this domain is NOT a usage |
| * domain but a control only domain, autoselect target domain. |
| */ |
| if (tdom < AP_DOMAINS && |
| !ap_test_config_usage_domain(tdom) && |
| ap_test_config_ctrl_domain(tdom)) |
| tdom = AUTOSEL_DOM; |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for usable CCA card */ |
| if (!zc->online || !zc->card->config || zc->card->chkstop || |
| !(zc->card->functions & 0x10000000)) |
| continue; |
| /* Check for user selected CCA card */ |
| if (xcrb->user_defined != AUTOSELECT && |
| xcrb->user_defined != zc->card->id) |
| continue; |
| /* check if request size exceeds card max msg size */ |
| if (ap_msg.len > zc->card->maxmsgsize) |
| continue; |
| /* check if device node has admission for this card */ |
| if (!zcrypt_check_card(perms, zc->card->id)) |
| continue; |
| /* get weight index of the card device */ |
| wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY]; |
| /* penalty if this msg was previously sent via this card */ |
| cpen = (tr && tr->again_counter && tr->last_qid && |
| AP_QID_CARD(tr->last_qid) == zc->card->id) ? |
| TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; |
| if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check for device usable and eligible */ |
| if (!zq->online || !zq->ops->send_cprb || |
| !zq->queue->config || zq->queue->chkstop || |
| (tdom != AUTOSEL_DOM && |
| tdom != AP_QID_QUEUE(zq->queue->qid))) |
| continue; |
| /* check if device node has admission for this queue */ |
| if (!zcrypt_check_queue(perms, |
| AP_QID_QUEUE(zq->queue->qid))) |
| continue; |
| /* penalty if the msg was previously sent at this qid */ |
| qpen = (tr && tr->again_counter && tr->last_qid && |
| tr->last_qid == zq->queue->qid) ? |
| TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; |
| if (!zcrypt_queue_compare(zq, pref_zq, |
| wgt + cpen + qpen, pref_wgt)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_wgt = wgt + cpen + qpen; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n", |
| __func__, xcrb->user_defined, *domain); |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| /* in case of auto select, provide the correct domain */ |
| qid = pref_zq->queue->qid; |
| if (*domain == AUTOSEL_DOM) |
| *domain = AP_QID_QUEUE(qid); |
| |
| rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| ap_release_message(&ap_msg); |
| if (tr) { |
| tr->last_rc = rc; |
| tr->last_qid = qid; |
| } |
| trace_s390_zcrypt_rep(xcrb, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| long zcrypt_send_cprb(struct ica_xcRB *xcrb) |
| { |
| return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb); |
| } |
| 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 (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP) |
| return true; |
| targets++; |
| } |
| return false; |
| } |
| |
| static bool is_desired_ep11_queue(unsigned int dev_qid, |
| unsigned short target_num, |
| struct ep11_target_dev *targets) |
| { |
| int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid); |
| |
| while (target_num-- > 0) { |
| if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) && |
| (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM)) |
| return true; |
| targets++; |
| } |
| return false; |
| } |
| |
| static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms, |
| struct zcrypt_track *tr, |
| 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 wgt = 0, pref_wgt = 0; |
| unsigned int func_code, domain; |
| struct ap_message ap_msg; |
| int cpen, qpen, qid = 0, rc = -ENODEV; |
| struct module *mod; |
| |
| trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB); |
| |
| ap_init_message(&ap_msg); |
| |
| 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) { |
| func_code = 0; |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| uptr = (struct ep11_target_dev __force __user *)xcrb->targets; |
| if (z_copy_from_user(userspace, targets, uptr, |
| target_num * sizeof(*targets))) { |
| func_code = 0; |
| rc = -EFAULT; |
| goto out_free; |
| } |
| } |
| |
| rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain); |
| if (rc) |
| goto out_free; |
| |
| if (perms != &ap_perms && domain < AUTOSEL_DOM) { |
| if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { |
| if (!test_bit_inv(domain, perms->adm)) { |
| rc = -ENODEV; |
| goto out_free; |
| } |
| } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) { |
| rc = -EOPNOTSUPP; |
| goto out_free; |
| } |
| } |
| |
| pref_zc = NULL; |
| pref_zq = NULL; |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| /* Check for usable EP11 card */ |
| if (!zc->online || !zc->card->config || zc->card->chkstop || |
| !(zc->card->functions & 0x04000000)) |
| continue; |
| /* Check for user selected EP11 card */ |
| if (targets && |
| !is_desired_ep11_card(zc->card->id, target_num, targets)) |
| continue; |
| /* check if request size exceeds card max msg size */ |
| if (ap_msg.len > zc->card->maxmsgsize) |
| continue; |
| /* check if device node has admission for this card */ |
| if (!zcrypt_check_card(perms, zc->card->id)) |
| continue; |
| /* get weight index of the card device */ |
| wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY]; |
| /* penalty if this msg was previously sent via this card */ |
| cpen = (tr && tr->again_counter && tr->last_qid && |
| AP_QID_CARD(tr->last_qid) == zc->card->id) ? |
| TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; |
| if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is usable and eligible */ |
| if (!zq->online || !zq->ops->send_ep11_cprb || |
| !zq->queue->config || zq->queue->chkstop || |
| (targets && |
| !is_desired_ep11_queue(zq->queue->qid, |
| target_num, targets))) |
| continue; |
| /* check if device node has admission for this queue */ |
| if (!zcrypt_check_queue(perms, |
| AP_QID_QUEUE(zq->queue->qid))) |
| continue; |
| /* penalty if the msg was previously sent at this qid */ |
| qpen = (tr && tr->again_counter && tr->last_qid && |
| tr->last_qid == zq->queue->qid) ? |
| TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; |
| if (!zcrypt_queue_compare(zq, pref_zq, |
| wgt + cpen + qpen, pref_wgt)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_wgt = wgt + cpen + qpen; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| if (targets && target_num == 1) { |
| ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n", |
| __func__, (int)targets->ap_id, |
| (int)targets->dom_id); |
| } else if (targets) { |
| ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n", |
| __func__, (int)target_num); |
| } else { |
| ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n", |
| __func__); |
| } |
| rc = -ENODEV; |
| goto out_free; |
| } |
| |
| qid = pref_zq->queue->qid; |
| rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg); |
| |
| spin_lock(&zcrypt_list_lock); |
| zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out_free: |
| kfree(targets); |
| out: |
| ap_release_message(&ap_msg); |
| if (tr) { |
| tr->last_rc = rc; |
| tr->last_qid = qid; |
| } |
| trace_s390_zcrypt_rep(xcrb, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb) |
| { |
| return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb); |
| } |
| EXPORT_SYMBOL(zcrypt_send_ep11_cprb); |
| |
| static long zcrypt_rng(char *buffer) |
| { |
| struct zcrypt_card *zc, *pref_zc; |
| struct zcrypt_queue *zq, *pref_zq; |
| unsigned int wgt = 0, pref_wgt = 0; |
| unsigned int func_code; |
| struct ap_message ap_msg; |
| unsigned int domain; |
| int qid = 0, rc = -ENODEV; |
| struct module *mod; |
| |
| trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB); |
| |
| ap_init_message(&ap_msg); |
| rc = prep_rng_ap_msg(&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 usable CCA card */ |
| if (!zc->online || !zc->card->config || zc->card->chkstop || |
| !(zc->card->functions & 0x10000000)) |
| continue; |
| /* get weight index of the card device */ |
| wgt = zc->speed_rating[func_code]; |
| if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt)) |
| continue; |
| for_each_zcrypt_queue(zq, zc) { |
| /* check if device is usable and eligible */ |
| if (!zq->online || !zq->ops->rng || |
| !zq->queue->config || zq->queue->chkstop) |
| continue; |
| if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt)) |
| continue; |
| pref_zc = zc; |
| pref_zq = zq; |
| pref_wgt = wgt; |
| } |
| } |
| pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| if (!pref_zq) { |
| ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n", |
| __func__); |
| rc = -ENODEV; |
| goto out; |
| } |
| |
| 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, mod, wgt); |
| spin_unlock(&zcrypt_list_lock); |
| |
| out: |
| ap_release_message(&ap_msg); |
| trace_s390_zcrypt_rep(buffer, func_code, rc, |
| AP_QID_CARD(qid), AP_QID_QUEUE(qid)); |
| return rc; |
| } |
| |
| static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| struct zcrypt_device_status *stat; |
| int card, queue; |
| |
| memset(devstatus, 0, MAX_ZDEV_ENTRIES |
| * sizeof(struct zcrypt_device_status)); |
| |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| card = AP_QID_CARD(zq->queue->qid); |
| if (card >= MAX_ZDEV_CARDIDS) |
| continue; |
| queue = AP_QID_QUEUE(zq->queue->qid); |
| stat = &devstatus[card * AP_DOMAINS + queue]; |
| 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); |
| } |
| |
| void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| struct zcrypt_device_status_ext *stat; |
| int card, queue; |
| |
| memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT |
| * sizeof(struct zcrypt_device_status_ext)); |
| |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| card = AP_QID_CARD(zq->queue->qid); |
| queue = AP_QID_QUEUE(zq->queue->qid); |
| stat = &devstatus[card * AP_DOMAINS + queue]; |
| 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_ext); |
| |
| int zcrypt_device_status_ext(int card, int queue, |
| struct zcrypt_device_status_ext *devstat) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| |
| memset(devstat, 0, sizeof(*devstat)); |
| |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| if (card == AP_QID_CARD(zq->queue->qid) && |
| queue == AP_QID_QUEUE(zq->queue->qid)) { |
| devstat->hwtype = zc->card->ap_dev.device_type; |
| devstat->functions = zc->card->functions >> 26; |
| devstat->qid = zq->queue->qid; |
| devstat->online = zq->online ? 0x01 : 0x00; |
| spin_unlock(&zcrypt_list_lock); |
| return 0; |
| } |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| |
| return -ENODEV; |
| } |
| EXPORT_SYMBOL(zcrypt_device_status_ext); |
| |
| static void zcrypt_status_mask(char status[], size_t max_adapters) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| int card; |
| |
| memset(status, 0, max_adapters); |
| spin_lock(&zcrypt_list_lock); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| card = AP_QID_CARD(zq->queue->qid); |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || |
| card >= max_adapters) |
| continue; |
| status[card] = zc->online ? zc->user_space_type : 0x0d; |
| } |
| } |
| spin_unlock(&zcrypt_list_lock); |
| } |
| |
| static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| int card; |
| |
| memset(qdepth, 0, max_adapters); |
| spin_lock(&zcrypt_list_lock); |
| local_bh_disable(); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| card = AP_QID_CARD(zq->queue->qid); |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || |
| card >= max_adapters) |
| continue; |
| spin_lock(&zq->queue->lock); |
| qdepth[card] = |
| 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(u32 reqcnt[], size_t max_adapters) |
| { |
| struct zcrypt_card *zc; |
| struct zcrypt_queue *zq; |
| int card; |
| u64 cnt; |
| |
| memset(reqcnt, 0, sizeof(int) * max_adapters); |
| spin_lock(&zcrypt_list_lock); |
| local_bh_disable(); |
| for_each_zcrypt_card(zc) { |
| for_each_zcrypt_queue(zq, zc) { |
| card = AP_QID_CARD(zq->queue->qid); |
| if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || |
| card >= max_adapters) |
| continue; |
| spin_lock(&zq->queue->lock); |
| cnt = zq->queue->total_request_count; |
| spin_unlock(&zq->queue->lock); |
| reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX; |
| } |
| } |
| 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 icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg) |
| { |
| int rc; |
| struct zcrypt_track tr; |
| struct ica_rsa_modexpo mex; |
| struct ica_rsa_modexpo __user *umex = (void __user *)arg; |
| |
| memset(&tr, 0, sizeof(tr)); |
| if (copy_from_user(&mex, umex, sizeof(mex))) |
| return -EFAULT; |
| |
| do { |
| rc = zcrypt_rsa_modexpo(perms, &tr, &mex); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_modexpo(perms, &tr, &mex); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| if (rc) { |
| ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc); |
| return rc; |
| } |
| return put_user(mex.outputdatalength, &umex->outputdatalength); |
| } |
| |
| static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg) |
| { |
| int rc; |
| struct zcrypt_track tr; |
| struct ica_rsa_modexpo_crt crt; |
| struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg; |
| |
| memset(&tr, 0, sizeof(tr)); |
| if (copy_from_user(&crt, ucrt, sizeof(crt))) |
| return -EFAULT; |
| |
| do { |
| rc = zcrypt_rsa_crt(perms, &tr, &crt); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_crt(perms, &tr, &crt); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| if (rc) { |
| ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc); |
| return rc; |
| } |
| return put_user(crt.outputdatalength, &ucrt->outputdatalength); |
| } |
| |
| static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg) |
| { |
| int rc; |
| struct ica_xcRB xcrb; |
| struct zcrypt_track tr; |
| struct ica_xcRB __user *uxcrb = (void __user *)arg; |
| |
| memset(&tr, 0, sizeof(tr)); |
| if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) |
| return -EFAULT; |
| |
| do { |
| rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| if (rc) |
| ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n", |
| rc, xcrb.status); |
| if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) |
| return -EFAULT; |
| return rc; |
| } |
| |
| static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg) |
| { |
| int rc; |
| struct ep11_urb xcrb; |
| struct zcrypt_track tr; |
| struct ep11_urb __user *uxcrb = (void __user *)arg; |
| |
| memset(&tr, 0, sizeof(tr)); |
| if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) |
| return -EFAULT; |
| |
| do { |
| rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| if (rc) |
| ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc); |
| if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) |
| return -EFAULT; |
| return rc; |
| } |
| |
| static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| int rc; |
| struct ap_perms *perms = |
| (struct ap_perms *)filp->private_data; |
| |
| rc = zcrypt_check_ioctl(perms, cmd); |
| if (rc) |
| return rc; |
| |
| switch (cmd) { |
| case ICARSAMODEXPO: |
| return icarsamodexpo_ioctl(perms, arg); |
| case ICARSACRT: |
| return icarsacrt_ioctl(perms, arg); |
| case ZSECSENDCPRB: |
| return zsecsendcprb_ioctl(perms, arg); |
| case ZSENDEP11CPRB: |
| return zsendep11cprb_ioctl(perms, arg); |
| case ZCRYPT_DEVICE_STATUS: { |
| struct zcrypt_device_status_ext *device_status; |
| size_t total_size = MAX_ZDEV_ENTRIES_EXT |
| * sizeof(struct zcrypt_device_status_ext); |
| |
| device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, |
| sizeof(struct zcrypt_device_status_ext), |
| GFP_KERNEL); |
| if (!device_status) |
| return -ENOMEM; |
| zcrypt_device_status_mask_ext(device_status); |
| if (copy_to_user((char __user *)arg, device_status, |
| total_size)) |
| rc = -EFAULT; |
| kvfree(device_status); |
| return rc; |
| } |
| case ZCRYPT_STATUS_MASK: { |
| char status[AP_DEVICES]; |
| |
| zcrypt_status_mask(status, AP_DEVICES); |
| if (copy_to_user((char __user *)arg, status, sizeof(status))) |
| return -EFAULT; |
| return 0; |
| } |
| case ZCRYPT_QDEPTH_MASK: { |
| char qdepth[AP_DEVICES]; |
| |
| zcrypt_qdepth_mask(qdepth, AP_DEVICES); |
| if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth))) |
| return -EFAULT; |
| return 0; |
| } |
| case ZCRYPT_PERDEV_REQCNT: { |
| u32 *reqcnt; |
| |
| reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL); |
| if (!reqcnt) |
| return -ENOMEM; |
| zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES); |
| if (copy_to_user((int __user *)arg, reqcnt, |
| sizeof(u32) * AP_DEVICES)) |
| rc = -EFAULT; |
| kfree(reqcnt); |
| return rc; |
| } |
| 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 |
| */ |
| case ZDEVICESTATUS: { |
| /* the old ioctl supports only 64 adapters */ |
| struct zcrypt_device_status *device_status; |
| size_t total_size = MAX_ZDEV_ENTRIES |
| * sizeof(struct zcrypt_device_status); |
| |
| device_status = kzalloc(total_size, GFP_KERNEL); |
| if (!device_status) |
| return -ENOMEM; |
| zcrypt_device_status_mask(device_status); |
| if (copy_to_user((char __user *)arg, device_status, |
| total_size)) |
| rc = -EFAULT; |
| kfree(device_status); |
| return rc; |
| } |
| case Z90STAT_STATUS_MASK: { |
| /* the old ioctl supports only 64 adapters */ |
| char status[MAX_ZDEV_CARDIDS]; |
| |
| zcrypt_status_mask(status, MAX_ZDEV_CARDIDS); |
| if (copy_to_user((char __user *)arg, status, sizeof(status))) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_QDEPTH_MASK: { |
| /* the old ioctl supports only 64 adapters */ |
| char qdepth[MAX_ZDEV_CARDIDS]; |
| |
| zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS); |
| if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth))) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_PERDEV_REQCNT: { |
| /* the old ioctl supports only 64 adapters */ |
| u32 reqcnt[MAX_ZDEV_CARDIDS]; |
| |
| zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS); |
| if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt))) |
| return -EFAULT; |
| return 0; |
| } |
| /* unknown ioctl number */ |
| default: |
| ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd); |
| 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 ap_perms *perms, 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; |
| struct zcrypt_track tr; |
| long rc; |
| |
| memset(&tr, 0, sizeof(tr)); |
| 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(perms, &tr, &mex64); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_modexpo(perms, &tr, &mex64); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| 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 ap_perms *perms, 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; |
| struct zcrypt_track tr; |
| long rc; |
| |
| memset(&tr, 0, sizeof(tr)); |
| 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(perms, &tr, &crt64); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_crt(perms, &tr, &crt64); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| 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; |
| } __packed; |
| |
| static long trans_xcrb32(struct ap_perms *perms, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg); |
| struct compat_ica_xcrb xcrb32; |
| struct zcrypt_track tr; |
| struct ica_xcRB xcrb64; |
| long rc; |
| |
| memset(&tr, 0, sizeof(tr)); |
| 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(true, perms, &tr, &xcrb64); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64); |
| if (rc == -EAGAIN) |
| tr.again_counter++; |
| } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); |
| if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) |
| rc = -EIO; |
| 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) |
| { |
| int rc; |
| struct ap_perms *perms = |
| (struct ap_perms *)filp->private_data; |
| |
| rc = zcrypt_check_ioctl(perms, cmd); |
| if (rc) |
| return rc; |
| |
| if (cmd == ICARSAMODEXPO) |
| return trans_modexpo32(perms, filp, cmd, arg); |
| if (cmd == ICARSACRT) |
| return trans_modexpo_crt32(perms, filp, cmd, arg); |
| if (cmd == ZSECSENDCPRB) |
| return trans_xcrb32(perms, 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, |
| }; |
| |
| 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; |
| 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); |
| } |
| |
| /* |
| * Wait until the zcrypt api is operational. |
| * The AP bus scan and the binding of ap devices to device drivers is |
| * an asynchronous job. This function waits until these initial jobs |
| * are done and so the zcrypt api should be ready to serve crypto |
| * requests - if there are resources available. The function uses an |
| * internal timeout of 60s. The very first caller will either wait for |
| * ap bus bindings complete or the timeout happens. This state will be |
| * remembered for further callers which will only be blocked until a |
| * decision is made (timeout or bindings complete). |
| * On timeout -ETIME is returned, on success the return value is 0. |
| */ |
| int zcrypt_wait_api_operational(void) |
| { |
| static DEFINE_MUTEX(zcrypt_wait_api_lock); |
| static int zcrypt_wait_api_state; |
| int rc; |
| |
| rc = mutex_lock_interruptible(&zcrypt_wait_api_lock); |
| if (rc) |
| return rc; |
| |
| switch (zcrypt_wait_api_state) { |
| case 0: |
| /* initial state, invoke wait for the ap bus complete */ |
| rc = ap_wait_init_apqn_bindings_complete( |
| msecs_to_jiffies(60 * 1000)); |
| switch (rc) { |
| case 0: |
| /* ap bus bindings are complete */ |
| zcrypt_wait_api_state = 1; |
| break; |
| case -EINTR: |
| /* interrupted, go back to caller */ |
| break; |
| case -ETIME: |
| /* timeout */ |
| ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n", |
| __func__); |
| zcrypt_wait_api_state = -ETIME; |
| break; |
| default: |
| /* other failure */ |
| ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n", |
| __func__, rc); |
| break; |
| } |
| break; |
| case 1: |
| /* a previous caller already found ap bus bindings complete */ |
| rc = 0; |
| break; |
| default: |
| /* a previous caller had timeout or other failure */ |
| rc = zcrypt_wait_api_state; |
| break; |
| } |
| |
| mutex_unlock(&zcrypt_wait_api_lock); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(zcrypt_wait_api_operational); |
| |
| int __init zcrypt_debug_init(void) |
| { |
| zcrypt_dbf_info = debug_register("zcrypt", 2, 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); |
| } |
| |
| static int __init zcdn_init(void) |
| { |
| int rc; |
| |
| /* create a new class 'zcrypt' */ |
| zcrypt_class = class_create(ZCRYPT_NAME); |
| if (IS_ERR(zcrypt_class)) { |
| rc = PTR_ERR(zcrypt_class); |
| goto out_class_create_failed; |
| } |
| zcrypt_class->dev_release = zcdn_device_release; |
| |
| /* alloc device minor range */ |
| rc = alloc_chrdev_region(&zcrypt_devt, |
| 0, ZCRYPT_MAX_MINOR_NODES, |
| ZCRYPT_NAME); |
| if (rc) |
| goto out_alloc_chrdev_failed; |
| |
| cdev_init(&zcrypt_cdev, &zcrypt_fops); |
| zcrypt_cdev.owner = THIS_MODULE; |
| rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); |
| if (rc) |
| goto out_cdev_add_failed; |
| |
| /* need some class specific sysfs attributes */ |
| rc = class_create_file(zcrypt_class, &class_attr_zcdn_create); |
| if (rc) |
| goto out_class_create_file_1_failed; |
| rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy); |
| if (rc) |
| goto out_class_create_file_2_failed; |
| |
| return 0; |
| |
| out_class_create_file_2_failed: |
| class_remove_file(zcrypt_class, &class_attr_zcdn_create); |
| out_class_create_file_1_failed: |
| cdev_del(&zcrypt_cdev); |
| out_cdev_add_failed: |
| unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); |
| out_alloc_chrdev_failed: |
| class_destroy(zcrypt_class); |
| out_class_create_failed: |
| return rc; |
| } |
| |
| static void zcdn_exit(void) |
| { |
| class_remove_file(zcrypt_class, &class_attr_zcdn_create); |
| class_remove_file(zcrypt_class, &class_attr_zcdn_destroy); |
| zcdn_destroy_all(); |
| cdev_del(&zcrypt_cdev); |
| unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); |
| class_destroy(zcrypt_class); |
| } |
| |
| /* |
| * 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; |
| |
| rc = zcdn_init(); |
| if (rc) |
| goto out; |
| |
| /* Register the request sprayer. */ |
| rc = misc_register(&zcrypt_misc_device); |
| if (rc < 0) |
| goto out_misc_register_failed; |
| |
| zcrypt_msgtype6_init(); |
| zcrypt_msgtype50_init(); |
| |
| return 0; |
| |
| out_misc_register_failed: |
| zcdn_exit(); |
| zcrypt_debug_exit(); |
| out: |
| return rc; |
| } |
| |
| /* |
| * zcrypt_api_exit(): Module termination. |
| * |
| * The module termination code. |
| */ |
| void __exit zcrypt_api_exit(void) |
| { |
| zcdn_exit(); |
| misc_deregister(&zcrypt_misc_device); |
| zcrypt_msgtype6_exit(); |
| zcrypt_msgtype50_exit(); |
| zcrypt_ccamisc_exit(); |
| zcrypt_ep11misc_exit(); |
| zcrypt_debug_exit(); |
| } |
| |
| module_init(zcrypt_api_init); |
| module_exit(zcrypt_api_exit); |