diff options
Diffstat (limited to 'drivers/s390/crypto/zcrypt_api.c')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_api.c | 2294 |
1 files changed, 2294 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c new file mode 100644 index 000000000..28e34d155 --- /dev/null +++ b/drivers/s390/crypto/zcrypt_api.c @@ -0,0 +1,2294 @@ +// 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); + +static int zcrypt_hwrng_seed = 1; +module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440); +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); + +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. + */ + +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + +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) +{ + int i, rc; + struct zcdn_device *zcdndev = to_zcdn_dev(dev); + + if (mutex_lock_interruptible(&ap_perms_mutex)) + return -ERESTARTSYS; + + buf[0] = '0'; + buf[1] = 'x'; + for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++) + snprintf(buf + 2 + 2 * i * sizeof(long), + PAGE_SIZE - 2 - 2 * i * sizeof(long), + "%016lx", zcdndev->perms.ioctlm[i]); + buf[2 + 2 * i * sizeof(long)] = '\n'; + buf[2 + 2 * i * sizeof(long) + 1] = '\0'; + rc = 2 + 2 * i * sizeof(long) + 1; + + mutex_unlock(&ap_perms_mutex); + + return rc; +} + +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) +{ + int i, rc; + struct zcdn_device *zcdndev = to_zcdn_dev(dev); + + if (mutex_lock_interruptible(&ap_perms_mutex)) + return -ERESTARTSYS; + + buf[0] = '0'; + buf[1] = 'x'; + for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++) + snprintf(buf + 2 + 2 * i * sizeof(long), + PAGE_SIZE - 2 - 2 * i * sizeof(long), + "%016lx", zcdndev->perms.apm[i]); + buf[2 + 2 * i * sizeof(long)] = '\n'; + buf[2 + 2 * i * sizeof(long) + 1] = '\0'; + rc = 2 + 2 * i * sizeof(long) + 1; + + mutex_unlock(&ap_perms_mutex); + + return rc; +} + +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) +{ + int i, rc; + struct zcdn_device *zcdndev = to_zcdn_dev(dev); + + if (mutex_lock_interruptible(&ap_perms_mutex)) + return -ERESTARTSYS; + + buf[0] = '0'; + buf[1] = 'x'; + for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++) + snprintf(buf + 2 + 2 * i * sizeof(long), + PAGE_SIZE - 2 - 2 * i * sizeof(long), + "%016lx", zcdndev->perms.aqm[i]); + buf[2 + 2 * i * sizeof(long)] = '\n'; + buf[2 + 2 * i * sizeof(long) + 1] = '\0'; + rc = 2 + 2 * i * sizeof(long) + 1; + + mutex_unlock(&ap_perms_mutex); + + return rc; +} + +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) +{ + int i, rc; + struct zcdn_device *zcdndev = to_zcdn_dev(dev); + + if (mutex_lock_interruptible(&ap_perms_mutex)) + return -ERESTARTSYS; + + buf[0] = '0'; + buf[1] = 'x'; + for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++) + snprintf(buf + 2 + 2 * i * sizeof(long), + PAGE_SIZE - 2 - 2 * i * sizeof(long), + "%016lx", zcdndev->perms.adm[i]); + buf[2 + 2 * i * sizeof(long)] = '\n'; + buf[2 + 2 * i * sizeof(long) + 1] = '\0'; + rc = 2 + 2 * i * sizeof(long) + 1; + + mutex_unlock(&ap_perms_mutex); + + return rc; +} + +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(struct class *class, + struct class_attribute *attr, + const char *buf, size_t count) +{ + int rc; + char name[ZCDN_MAX_NAME]; + + strncpy(name, skip_spaces(buf), sizeof(name)); + name[sizeof(name) - 1] = '\0'; + + 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(struct class *class, + struct class_attribute *attr, + const char *buf, size_t count) +{ + int rc; + char name[ZCDN_MAX_NAME]; + + strncpy(name, skip_spaces(buf), sizeof(name)); + name[sizeof(name) - 1] = '\0'; + + 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; + char nodename[ZCDN_MAX_NAME]; + 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]) + strncpy(nodename, name, sizeof(nodename)); + else + snprintf(nodename, sizeof(nodename), + ZCRYPT_NAME "_%d", (int)MINOR(devt)); + nodename[sizeof(nodename) - 1] = '\0'; + if (dev_set_name(&zcdndev->device, nodename)) { + kfree(zcdndev); + rc = -EINVAL; + 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); +} + +#endif + +/* + * 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; + +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + 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; + } +#endif + 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) +{ +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + 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); + } + } +#endif + + 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); + +#ifdef CONFIG_ZCRYPT_DEBUG + if (tr && tr->fi.cmd) + ap_msg.fi.cmd = tr->fi.cmd; +#endif + + 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 accelarator 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); + +#ifdef CONFIG_ZCRYPT_DEBUG + if (tr && tr->fi.cmd) + ap_msg.fi.cmd = tr->fi.cmd; +#endif + + 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 accelarator 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); + +#ifdef CONFIG_ZCRYPT_DEBUG + if (tr && tr->fi.cmd) + ap_msg.fi.cmd = tr->fi.cmd; + if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) { + ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n", + __func__, tr->fi.cmd); + xcrb->agent_ID = 0x4646; + } +#endif + + 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); + +#ifdef CONFIG_ZCRYPT_DEBUG + if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) { + ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n", + __func__, tr->fi.cmd); + *domain = 99; + } +#endif + + 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); + +#ifdef CONFIG_ZCRYPT_DEBUG + if (tr && tr->fi.cmd) + ap_msg.fi.cmd = tr->fi.cmd; +#endif + + 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; + +#ifdef CONFIG_ZCRYPT_DEBUG + if (mex.inputdatalength & (1U << 31)) { + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + tr.fi.cmd = (u16)(mex.inputdatalength >> 16); + } + mex.inputdatalength &= 0x0000FFFF; +#endif + + do { + rc = zcrypt_rsa_modexpo(perms, &tr, &mex); + if (rc == -EAGAIN) + tr.again_counter++; +#ifdef CONFIG_ZCRYPT_DEBUG + if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) + break; +#endif + } 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; + +#ifdef CONFIG_ZCRYPT_DEBUG + if (crt.inputdatalength & (1U << 31)) { + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + tr.fi.cmd = (u16)(crt.inputdatalength >> 16); + } + crt.inputdatalength &= 0x0000FFFF; +#endif + + do { + rc = zcrypt_rsa_crt(perms, &tr, &crt); + if (rc == -EAGAIN) + tr.again_counter++; +#ifdef CONFIG_ZCRYPT_DEBUG + if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) + break; +#endif + } 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; + +#ifdef CONFIG_ZCRYPT_DEBUG + if ((xcrb.status & 0x8000FFFF) == 0x80004649 /* 'FI' */) { + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + tr.fi.cmd = (u16)(xcrb.status >> 16); + } + xcrb.status = 0; +#endif + + do { + rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb); + if (rc == -EAGAIN) + tr.again_counter++; +#ifdef CONFIG_ZCRYPT_DEBUG + if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) + break; +#endif + } 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; + +#ifdef CONFIG_ZCRYPT_DEBUG + if (xcrb.req_len & (1ULL << 63)) { + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + tr.fi.cmd = (u16)(xcrb.req_len >> 48); + } + xcrb.req_len &= 0x0000FFFFFFFFFFFFULL; +#endif + + do { + rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); + if (rc == -EAGAIN) + tr.again_counter++; +#ifdef CONFIG_ZCRYPT_DEBUG + if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) + break; +#endif + } 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 = kzalloc(total_size, 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; + kfree(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; + 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); +} + +/* + * 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); +} + +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + +static int __init zcdn_init(void) +{ + int rc; + + /* create a new class 'zcrypt' */ + zcrypt_class = class_create(THIS_MODULE, 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); +} + +#endif + +/* + * 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; + +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + rc = zcdn_init(); + if (rc) + goto out; +#endif + + /* 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: +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + zcdn_exit(); +#endif + zcrypt_debug_exit(); +out: + return rc; +} + +/* + * zcrypt_api_exit(): Module termination. + * + * The module termination code. + */ +void __exit zcrypt_api_exit(void) +{ +#ifdef CONFIG_ZCRYPT_MULTIDEVNODES + zcdn_exit(); +#endif + 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); |