1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright IBM Corp. 2001, 2018
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
6 * Cornelia Huck <cornelia.huck@de.ibm.com>
8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
10 * Ralph Wuerthner <rwuerthn@de.ibm.com>
11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
12 * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/miscdevice.h>
20 #include <linux/compat.h>
21 #include <linux/slab.h>
22 #include <linux/atomic.h>
23 #include <linux/uaccess.h>
24 #include <linux/hw_random.h>
25 #include <linux/debugfs.h>
26 #include <linux/cdev.h>
27 #include <linux/ctype.h>
28 #include <linux/capability.h>
29 #include <asm/debug.h>
31 #define CREATE_TRACE_POINTS
32 #include <asm/trace/zcrypt.h>
34 #include "zcrypt_api.h"
35 #include "zcrypt_debug.h"
37 #include "zcrypt_msgtype6.h"
38 #include "zcrypt_msgtype50.h"
39 #include "zcrypt_ccamisc.h"
40 #include "zcrypt_ep11misc.h"
45 MODULE_AUTHOR("IBM Corporation");
46 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
47 "Copyright IBM Corp. 2001, 2012");
48 MODULE_LICENSE("GPL");
51 * zcrypt tracepoint functions
53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
54 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
56 static int zcrypt_hwrng_seed = 1;
57 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
58 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
60 DEFINE_SPINLOCK(zcrypt_list_lock);
61 LIST_HEAD(zcrypt_card_list);
62 int zcrypt_device_count;
64 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
65 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
67 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
68 EXPORT_SYMBOL(zcrypt_rescan_req);
70 static LIST_HEAD(zcrypt_ops_list);
72 /* Zcrypt related debug feature stuff. */
73 debug_info_t *zcrypt_dbf_info;
76 * Process a rescan of the transport layer.
78 * Returns 1, if the rescan has been processed, otherwise 0.
80 static inline int zcrypt_process_rescan(void)
82 if (atomic_read(&zcrypt_rescan_req)) {
83 atomic_set(&zcrypt_rescan_req, 0);
84 atomic_inc(&zcrypt_rescan_count);
85 ap_bus_force_rescan();
86 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
87 atomic_inc_return(&zcrypt_rescan_count));
93 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
95 list_add_tail(&zops->list, &zcrypt_ops_list);
98 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
100 list_del_init(&zops->list);
103 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
105 struct zcrypt_ops *zops;
107 list_for_each_entry(zops, &zcrypt_ops_list, list)
108 if ((zops->variant == variant) &&
109 (!strncmp(zops->name, name, sizeof(zops->name))))
113 EXPORT_SYMBOL(zcrypt_msgtype);
116 * Multi device nodes extension functions.
119 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
123 static struct class *zcrypt_class;
124 static dev_t zcrypt_devt;
125 static struct cdev zcrypt_cdev;
128 struct device device;
129 struct ap_perms perms;
132 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
134 #define ZCDN_MAX_NAME 32
136 static int zcdn_create(const char *name);
137 static int zcdn_destroy(const char *name);
140 * Find zcdn device by name.
141 * Returns reference to the zcdn device which needs to be released
142 * with put_device() after use.
144 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
146 struct device *dev = class_find_device_by_name(zcrypt_class, name);
148 return dev ? to_zcdn_dev(dev) : NULL;
152 * Find zcdn device by devt value.
153 * Returns reference to the zcdn device which needs to be released
154 * with put_device() after use.
156 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
158 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
160 return dev ? to_zcdn_dev(dev) : NULL;
163 static ssize_t ioctlmask_show(struct device *dev,
164 struct device_attribute *attr,
168 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
170 if (mutex_lock_interruptible(&ap_perms_mutex))
175 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
176 snprintf(buf + 2 + 2 * i * sizeof(long),
177 PAGE_SIZE - 2 - 2 * i * sizeof(long),
178 "%016lx", zcdndev->perms.ioctlm[i]);
179 buf[2 + 2 * i * sizeof(long)] = '\n';
180 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
181 rc = 2 + 2 * i * sizeof(long) + 1;
183 mutex_unlock(&ap_perms_mutex);
188 static ssize_t ioctlmask_store(struct device *dev,
189 struct device_attribute *attr,
190 const char *buf, size_t count)
193 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
195 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
196 AP_IOCTLS, &ap_perms_mutex);
203 static DEVICE_ATTR_RW(ioctlmask);
205 static ssize_t apmask_show(struct device *dev,
206 struct device_attribute *attr,
210 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
212 if (mutex_lock_interruptible(&ap_perms_mutex))
217 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
218 snprintf(buf + 2 + 2 * i * sizeof(long),
219 PAGE_SIZE - 2 - 2 * i * sizeof(long),
220 "%016lx", zcdndev->perms.apm[i]);
221 buf[2 + 2 * i * sizeof(long)] = '\n';
222 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
223 rc = 2 + 2 * i * sizeof(long) + 1;
225 mutex_unlock(&ap_perms_mutex);
230 static ssize_t apmask_store(struct device *dev,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
235 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
237 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
238 AP_DEVICES, &ap_perms_mutex);
245 static DEVICE_ATTR_RW(apmask);
247 static ssize_t aqmask_show(struct device *dev,
248 struct device_attribute *attr,
252 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
254 if (mutex_lock_interruptible(&ap_perms_mutex))
259 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
260 snprintf(buf + 2 + 2 * i * sizeof(long),
261 PAGE_SIZE - 2 - 2 * i * sizeof(long),
262 "%016lx", zcdndev->perms.aqm[i]);
263 buf[2 + 2 * i * sizeof(long)] = '\n';
264 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
265 rc = 2 + 2 * i * sizeof(long) + 1;
267 mutex_unlock(&ap_perms_mutex);
272 static ssize_t aqmask_store(struct device *dev,
273 struct device_attribute *attr,
274 const char *buf, size_t count)
277 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
279 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
280 AP_DOMAINS, &ap_perms_mutex);
287 static DEVICE_ATTR_RW(aqmask);
289 static struct attribute *zcdn_dev_attrs[] = {
290 &dev_attr_ioctlmask.attr,
291 &dev_attr_apmask.attr,
292 &dev_attr_aqmask.attr,
296 static struct attribute_group zcdn_dev_attr_group = {
297 .attrs = zcdn_dev_attrs
300 static const struct attribute_group *zcdn_dev_attr_groups[] = {
301 &zcdn_dev_attr_group,
305 static ssize_t zcdn_create_store(struct class *class,
306 struct class_attribute *attr,
307 const char *buf, size_t count)
310 char name[ZCDN_MAX_NAME];
312 strncpy(name, skip_spaces(buf), sizeof(name));
313 name[sizeof(name) - 1] = '\0';
315 rc = zcdn_create(strim(name));
317 return rc ? rc : count;
320 static const struct class_attribute class_attr_zcdn_create =
321 __ATTR(create, 0600, NULL, zcdn_create_store);
323 static ssize_t zcdn_destroy_store(struct class *class,
324 struct class_attribute *attr,
325 const char *buf, size_t count)
328 char name[ZCDN_MAX_NAME];
330 strncpy(name, skip_spaces(buf), sizeof(name));
331 name[sizeof(name) - 1] = '\0';
333 rc = zcdn_destroy(strim(name));
335 return rc ? rc : count;
338 static const struct class_attribute class_attr_zcdn_destroy =
339 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
341 static void zcdn_device_release(struct device *dev)
343 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
345 ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
346 MAJOR(dev->devt), MINOR(dev->devt));
351 static int zcdn_create(const char *name)
355 char nodename[ZCDN_MAX_NAME];
356 struct zcdn_device *zcdndev;
358 if (mutex_lock_interruptible(&ap_perms_mutex))
361 /* check if device node with this name already exists */
363 zcdndev = find_zcdndev_by_name(name);
365 put_device(&zcdndev->device);
371 /* find an unused minor number */
372 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
373 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
374 zcdndev = find_zcdndev_by_devt(devt);
376 put_device(&zcdndev->device);
380 if (i == ZCRYPT_MAX_MINOR_NODES) {
385 /* alloc and prepare a new zcdn device */
386 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
391 zcdndev->device.release = zcdn_device_release;
392 zcdndev->device.class = zcrypt_class;
393 zcdndev->device.devt = devt;
394 zcdndev->device.groups = zcdn_dev_attr_groups;
396 strncpy(nodename, name, sizeof(nodename));
398 snprintf(nodename, sizeof(nodename),
399 ZCRYPT_NAME "_%d", (int) MINOR(devt));
400 nodename[sizeof(nodename)-1] = '\0';
401 if (dev_set_name(&zcdndev->device, nodename)) {
406 rc = device_register(&zcdndev->device);
408 put_device(&zcdndev->device);
412 ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
413 MAJOR(devt), MINOR(devt));
416 mutex_unlock(&ap_perms_mutex);
420 static int zcdn_destroy(const char *name)
423 struct zcdn_device *zcdndev;
425 if (mutex_lock_interruptible(&ap_perms_mutex))
428 /* try to find this zcdn device */
429 zcdndev = find_zcdndev_by_name(name);
436 * The zcdn device is not hard destroyed. It is subject to
437 * reference counting and thus just needs to be unregistered.
439 put_device(&zcdndev->device);
440 device_unregister(&zcdndev->device);
443 mutex_unlock(&ap_perms_mutex);
447 static void zcdn_destroy_all(void)
451 struct zcdn_device *zcdndev;
453 mutex_lock(&ap_perms_mutex);
454 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
455 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
456 zcdndev = find_zcdndev_by_devt(devt);
458 put_device(&zcdndev->device);
459 device_unregister(&zcdndev->device);
462 mutex_unlock(&ap_perms_mutex);
468 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
470 * This function is not supported beyond zcrypt 1.3.1.
472 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
473 size_t count, loff_t *f_pos)
479 * zcrypt_write(): Not allowed.
481 * Write is is not allowed
483 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
484 size_t count, loff_t *f_pos)
490 * zcrypt_open(): Count number of users.
492 * Device open function to count number of users.
494 static int zcrypt_open(struct inode *inode, struct file *filp)
496 struct ap_perms *perms = &ap_perms;
498 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
499 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
500 struct zcdn_device *zcdndev;
502 if (mutex_lock_interruptible(&ap_perms_mutex))
504 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
505 /* find returns a reference, no get_device() needed */
506 mutex_unlock(&ap_perms_mutex);
508 perms = &zcdndev->perms;
511 filp->private_data = (void *) perms;
513 atomic_inc(&zcrypt_open_count);
514 return stream_open(inode, filp);
518 * zcrypt_release(): Count number of users.
520 * Device close function to count number of users.
522 static int zcrypt_release(struct inode *inode, struct file *filp)
524 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
525 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
526 struct zcdn_device *zcdndev;
528 mutex_lock(&ap_perms_mutex);
529 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
530 mutex_unlock(&ap_perms_mutex);
532 /* 2 puts here: one for find, one for open */
533 put_device(&zcdndev->device);
534 put_device(&zcdndev->device);
539 atomic_dec(&zcrypt_open_count);
543 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
547 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
549 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
550 if (test_bit_inv(ioctlnr, perms->ioctlm))
556 "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
562 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
564 return test_bit_inv(card, perms->apm) ? true : false;
567 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
569 return test_bit_inv(queue, perms->aqm) ? true : false;
572 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
573 struct zcrypt_queue *zq,
574 struct module **pmod,
577 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
580 zcrypt_queue_get(zq);
581 get_device(&zq->queue->ap_dev.device);
582 atomic_add(weight, &zc->load);
583 atomic_add(weight, &zq->load);
585 *pmod = zq->queue->ap_dev.drv->driver.owner;
589 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
590 struct zcrypt_queue *zq,
595 atomic_sub(weight, &zc->load);
596 atomic_sub(weight, &zq->load);
597 put_device(&zq->queue->ap_dev.device);
598 zcrypt_queue_put(zq);
603 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
604 struct zcrypt_card *pref_zc,
606 unsigned int pref_weight)
610 weight += atomic_read(&zc->load);
611 pref_weight += atomic_read(&pref_zc->load);
612 if (weight == pref_weight)
613 return atomic64_read(&zc->card->total_request_count) <
614 atomic64_read(&pref_zc->card->total_request_count);
615 return weight < pref_weight;
618 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
619 struct zcrypt_queue *pref_zq,
621 unsigned int pref_weight)
625 weight += atomic_read(&zq->load);
626 pref_weight += atomic_read(&pref_zq->load);
627 if (weight == pref_weight)
628 return zq->queue->total_request_count <
629 pref_zq->queue->total_request_count;
630 return weight < pref_weight;
636 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
637 struct zcrypt_track *tr,
638 struct ica_rsa_modexpo *mex)
640 struct zcrypt_card *zc, *pref_zc;
641 struct zcrypt_queue *zq, *pref_zq;
642 struct ap_message ap_msg;
643 unsigned int wgt = 0, pref_wgt = 0;
644 unsigned int func_code;
645 int cpen, qpen, qid = 0, rc = -ENODEV;
648 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
650 ap_init_message(&ap_msg);
652 #ifdef CONFIG_ZCRYPT_DEBUG
653 if (tr && tr->fi.cmd)
654 ap_msg.fi.cmd = tr->fi.cmd;
657 if (mex->outputdatalength < mex->inputdatalength) {
664 * As long as outputdatalength is big enough, we can set the
665 * outputdatalength equal to the inputdatalength, since that is the
666 * number of bytes we will copy in any case
668 mex->outputdatalength = mex->inputdatalength;
670 rc = get_rsa_modex_fc(mex, &func_code);
676 spin_lock(&zcrypt_list_lock);
677 for_each_zcrypt_card(zc) {
678 /* Check for useable accelarator or CCA card */
679 if (!zc->online || !zc->card->config ||
680 !(zc->card->functions & 0x18000000))
682 /* Check for size limits */
683 if (zc->min_mod_size > mex->inputdatalength ||
684 zc->max_mod_size < mex->inputdatalength)
686 /* check if device node has admission for this card */
687 if (!zcrypt_check_card(perms, zc->card->id))
689 /* get weight index of the card device */
690 wgt = zc->speed_rating[func_code];
691 /* penalty if this msg was previously sent via this card */
692 cpen = (tr && tr->again_counter && tr->last_qid &&
693 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
694 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
695 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
697 for_each_zcrypt_queue(zq, zc) {
698 /* check if device is useable and eligible */
699 if (!zq->online || !zq->ops->rsa_modexpo ||
702 /* check if device node has admission for this queue */
703 if (!zcrypt_check_queue(perms,
704 AP_QID_QUEUE(zq->queue->qid)))
706 /* penalty if the msg was previously sent at this qid */
707 qpen = (tr && tr->again_counter && tr->last_qid &&
708 tr->last_qid == zq->queue->qid) ?
709 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
710 if (!zcrypt_queue_compare(zq, pref_zq,
711 wgt + cpen + qpen, pref_wgt))
715 pref_wgt = wgt + cpen + qpen;
718 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
719 spin_unlock(&zcrypt_list_lock);
726 qid = pref_zq->queue->qid;
727 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
729 spin_lock(&zcrypt_list_lock);
730 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
731 spin_unlock(&zcrypt_list_lock);
734 ap_release_message(&ap_msg);
739 trace_s390_zcrypt_rep(mex, func_code, rc,
740 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
744 static long zcrypt_rsa_crt(struct ap_perms *perms,
745 struct zcrypt_track *tr,
746 struct ica_rsa_modexpo_crt *crt)
748 struct zcrypt_card *zc, *pref_zc;
749 struct zcrypt_queue *zq, *pref_zq;
750 struct ap_message ap_msg;
751 unsigned int wgt = 0, pref_wgt = 0;
752 unsigned int func_code;
753 int cpen, qpen, qid = 0, rc = -ENODEV;
756 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
758 ap_init_message(&ap_msg);
760 #ifdef CONFIG_ZCRYPT_DEBUG
761 if (tr && tr->fi.cmd)
762 ap_msg.fi.cmd = tr->fi.cmd;
765 if (crt->outputdatalength < crt->inputdatalength) {
772 * As long as outputdatalength is big enough, we can set the
773 * outputdatalength equal to the inputdatalength, since that is the
774 * number of bytes we will copy in any case
776 crt->outputdatalength = crt->inputdatalength;
778 rc = get_rsa_crt_fc(crt, &func_code);
784 spin_lock(&zcrypt_list_lock);
785 for_each_zcrypt_card(zc) {
786 /* Check for useable accelarator or CCA card */
787 if (!zc->online || !zc->card->config ||
788 !(zc->card->functions & 0x18000000))
790 /* Check for size limits */
791 if (zc->min_mod_size > crt->inputdatalength ||
792 zc->max_mod_size < crt->inputdatalength)
794 /* check if device node has admission for this card */
795 if (!zcrypt_check_card(perms, zc->card->id))
797 /* get weight index of the card device */
798 wgt = zc->speed_rating[func_code];
799 /* penalty if this msg was previously sent via this card */
800 cpen = (tr && tr->again_counter && tr->last_qid &&
801 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
802 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
803 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
805 for_each_zcrypt_queue(zq, zc) {
806 /* check if device is useable and eligible */
807 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
810 /* check if device node has admission for this queue */
811 if (!zcrypt_check_queue(perms,
812 AP_QID_QUEUE(zq->queue->qid)))
814 /* penalty if the msg was previously sent at this qid */
815 qpen = (tr && tr->again_counter && tr->last_qid &&
816 tr->last_qid == zq->queue->qid) ?
817 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
818 if (!zcrypt_queue_compare(zq, pref_zq,
819 wgt + cpen + qpen, pref_wgt))
823 pref_wgt = wgt + cpen + qpen;
826 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
827 spin_unlock(&zcrypt_list_lock);
834 qid = pref_zq->queue->qid;
835 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
837 spin_lock(&zcrypt_list_lock);
838 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
839 spin_unlock(&zcrypt_list_lock);
842 ap_release_message(&ap_msg);
847 trace_s390_zcrypt_rep(crt, func_code, rc,
848 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
852 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
853 struct zcrypt_track *tr,
854 struct ica_xcRB *xcRB)
856 struct zcrypt_card *zc, *pref_zc;
857 struct zcrypt_queue *zq, *pref_zq;
858 struct ap_message ap_msg;
859 unsigned int wgt = 0, pref_wgt = 0;
860 unsigned int func_code;
861 unsigned short *domain, tdom;
862 int cpen, qpen, qid = 0, rc = -ENODEV;
865 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
868 ap_init_message(&ap_msg);
870 #ifdef CONFIG_ZCRYPT_DEBUG
871 if (tr && tr->fi.cmd)
872 ap_msg.fi.cmd = tr->fi.cmd;
873 if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
874 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
875 __func__, tr->fi.cmd);
876 xcRB->agent_ID = 0x4646;
880 rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
885 * If a valid target domain is set and this domain is NOT a usage
886 * domain but a control only domain, use the default domain as target.
889 if (tdom < AP_DOMAINS &&
890 !ap_test_config_usage_domain(tdom) &&
891 ap_test_config_ctrl_domain(tdom) &&
892 ap_domain_index >= 0)
893 tdom = ap_domain_index;
897 spin_lock(&zcrypt_list_lock);
898 for_each_zcrypt_card(zc) {
899 /* Check for useable CCA card */
900 if (!zc->online || !zc->card->config ||
901 !(zc->card->functions & 0x10000000))
903 /* Check for user selected CCA card */
904 if (xcRB->user_defined != AUTOSELECT &&
905 xcRB->user_defined != zc->card->id)
907 /* check if device node has admission for this card */
908 if (!zcrypt_check_card(perms, zc->card->id))
910 /* get weight index of the card device */
911 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
912 /* penalty if this msg was previously sent via this card */
913 cpen = (tr && tr->again_counter && tr->last_qid &&
914 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
915 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
916 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
918 for_each_zcrypt_queue(zq, zc) {
919 /* check for device useable and eligible */
921 !zq->ops->send_cprb ||
922 !zq->queue->config ||
923 (tdom != AUTOSEL_DOM &&
924 tdom != AP_QID_QUEUE(zq->queue->qid)))
926 /* check if device node has admission for this queue */
927 if (!zcrypt_check_queue(perms,
928 AP_QID_QUEUE(zq->queue->qid)))
930 /* penalty if the msg was previously sent at this qid */
931 qpen = (tr && tr->again_counter && tr->last_qid &&
932 tr->last_qid == zq->queue->qid) ?
933 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
934 if (!zcrypt_queue_compare(zq, pref_zq,
935 wgt + cpen + qpen, pref_wgt))
939 pref_wgt = wgt + cpen + qpen;
942 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
943 spin_unlock(&zcrypt_list_lock);
950 /* in case of auto select, provide the correct domain */
951 qid = pref_zq->queue->qid;
952 if (*domain == AUTOSEL_DOM)
953 *domain = AP_QID_QUEUE(qid);
955 #ifdef CONFIG_ZCRYPT_DEBUG
956 if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
957 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
958 __func__, tr->fi.cmd);
963 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
965 spin_lock(&zcrypt_list_lock);
966 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
967 spin_unlock(&zcrypt_list_lock);
970 ap_release_message(&ap_msg);
975 trace_s390_zcrypt_rep(xcRB, func_code, rc,
976 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
980 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
982 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
984 EXPORT_SYMBOL(zcrypt_send_cprb);
986 static bool is_desired_ep11_card(unsigned int dev_id,
987 unsigned short target_num,
988 struct ep11_target_dev *targets)
990 while (target_num-- > 0) {
991 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
998 static bool is_desired_ep11_queue(unsigned int dev_qid,
999 unsigned short target_num,
1000 struct ep11_target_dev *targets)
1002 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1004 while (target_num-- > 0) {
1005 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1006 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1013 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1014 struct zcrypt_track *tr,
1015 struct ep11_urb *xcrb)
1017 struct zcrypt_card *zc, *pref_zc;
1018 struct zcrypt_queue *zq, *pref_zq;
1019 struct ep11_target_dev *targets;
1020 unsigned short target_num;
1021 unsigned int wgt = 0, pref_wgt = 0;
1022 unsigned int func_code;
1023 struct ap_message ap_msg;
1024 int cpen, qpen, qid = 0, rc = -ENODEV;
1027 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1029 ap_init_message(&ap_msg);
1031 #ifdef CONFIG_ZCRYPT_DEBUG
1032 if (tr && tr->fi.cmd)
1033 ap_msg.fi.cmd = tr->fi.cmd;
1036 target_num = (unsigned short) xcrb->targets_num;
1038 /* empty list indicates autoselect (all available targets) */
1040 if (target_num != 0) {
1041 struct ep11_target_dev __user *uptr;
1043 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1050 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
1051 if (z_copy_from_user(userspace, targets, uptr,
1052 target_num * sizeof(*targets))) {
1059 rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
1065 spin_lock(&zcrypt_list_lock);
1066 for_each_zcrypt_card(zc) {
1067 /* Check for useable EP11 card */
1068 if (!zc->online || !zc->card->config ||
1069 !(zc->card->functions & 0x04000000))
1071 /* Check for user selected EP11 card */
1073 !is_desired_ep11_card(zc->card->id, target_num, targets))
1075 /* check if device node has admission for this card */
1076 if (!zcrypt_check_card(perms, zc->card->id))
1078 /* get weight index of the card device */
1079 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1080 /* penalty if this msg was previously sent via this card */
1081 cpen = (tr && tr->again_counter && tr->last_qid &&
1082 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1083 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1084 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1086 for_each_zcrypt_queue(zq, zc) {
1087 /* check if device is useable and eligible */
1089 !zq->ops->send_ep11_cprb ||
1090 !zq->queue->config ||
1092 !is_desired_ep11_queue(zq->queue->qid,
1093 target_num, targets)))
1095 /* check if device node has admission for this queue */
1096 if (!zcrypt_check_queue(perms,
1097 AP_QID_QUEUE(zq->queue->qid)))
1099 /* penalty if the msg was previously sent at this qid */
1100 qpen = (tr && tr->again_counter && tr->last_qid &&
1101 tr->last_qid == zq->queue->qid) ?
1102 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1103 if (!zcrypt_queue_compare(zq, pref_zq,
1104 wgt + cpen + qpen, pref_wgt))
1108 pref_wgt = wgt + cpen + qpen;
1111 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1112 spin_unlock(&zcrypt_list_lock);
1119 qid = pref_zq->queue->qid;
1120 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1122 spin_lock(&zcrypt_list_lock);
1123 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1124 spin_unlock(&zcrypt_list_lock);
1129 ap_release_message(&ap_msg);
1134 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1135 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1139 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1141 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1143 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1145 static long zcrypt_rng(char *buffer)
1147 struct zcrypt_card *zc, *pref_zc;
1148 struct zcrypt_queue *zq, *pref_zq;
1149 unsigned int wgt = 0, pref_wgt = 0;
1150 unsigned int func_code;
1151 struct ap_message ap_msg;
1152 unsigned int domain;
1153 int qid = 0, rc = -ENODEV;
1156 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1158 ap_init_message(&ap_msg);
1159 rc = get_rng_fc(&ap_msg, &func_code, &domain);
1165 spin_lock(&zcrypt_list_lock);
1166 for_each_zcrypt_card(zc) {
1167 /* Check for useable CCA card */
1168 if (!zc->online || !zc->card->config ||
1169 !(zc->card->functions & 0x10000000))
1171 /* get weight index of the card device */
1172 wgt = zc->speed_rating[func_code];
1173 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1175 for_each_zcrypt_queue(zq, zc) {
1176 /* check if device is useable and eligible */
1177 if (!zq->online || !zq->ops->rng ||
1180 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1187 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1188 spin_unlock(&zcrypt_list_lock);
1195 qid = pref_zq->queue->qid;
1196 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1198 spin_lock(&zcrypt_list_lock);
1199 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1200 spin_unlock(&zcrypt_list_lock);
1203 ap_release_message(&ap_msg);
1204 trace_s390_zcrypt_rep(buffer, func_code, rc,
1205 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1209 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1211 struct zcrypt_card *zc;
1212 struct zcrypt_queue *zq;
1213 struct zcrypt_device_status *stat;
1216 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1217 * sizeof(struct zcrypt_device_status));
1219 spin_lock(&zcrypt_list_lock);
1220 for_each_zcrypt_card(zc) {
1221 for_each_zcrypt_queue(zq, zc) {
1222 card = AP_QID_CARD(zq->queue->qid);
1223 if (card >= MAX_ZDEV_CARDIDS)
1225 queue = AP_QID_QUEUE(zq->queue->qid);
1226 stat = &devstatus[card * AP_DOMAINS + queue];
1227 stat->hwtype = zc->card->ap_dev.device_type;
1228 stat->functions = zc->card->functions >> 26;
1229 stat->qid = zq->queue->qid;
1230 stat->online = zq->online ? 0x01 : 0x00;
1233 spin_unlock(&zcrypt_list_lock);
1236 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1238 struct zcrypt_card *zc;
1239 struct zcrypt_queue *zq;
1240 struct zcrypt_device_status_ext *stat;
1243 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1244 * sizeof(struct zcrypt_device_status_ext));
1246 spin_lock(&zcrypt_list_lock);
1247 for_each_zcrypt_card(zc) {
1248 for_each_zcrypt_queue(zq, zc) {
1249 card = AP_QID_CARD(zq->queue->qid);
1250 queue = AP_QID_QUEUE(zq->queue->qid);
1251 stat = &devstatus[card * AP_DOMAINS + queue];
1252 stat->hwtype = zc->card->ap_dev.device_type;
1253 stat->functions = zc->card->functions >> 26;
1254 stat->qid = zq->queue->qid;
1255 stat->online = zq->online ? 0x01 : 0x00;
1258 spin_unlock(&zcrypt_list_lock);
1260 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1262 int zcrypt_device_status_ext(int card, int queue,
1263 struct zcrypt_device_status_ext *devstat)
1265 struct zcrypt_card *zc;
1266 struct zcrypt_queue *zq;
1268 memset(devstat, 0, sizeof(*devstat));
1270 spin_lock(&zcrypt_list_lock);
1271 for_each_zcrypt_card(zc) {
1272 for_each_zcrypt_queue(zq, zc) {
1273 if (card == AP_QID_CARD(zq->queue->qid) &&
1274 queue == AP_QID_QUEUE(zq->queue->qid)) {
1275 devstat->hwtype = zc->card->ap_dev.device_type;
1276 devstat->functions = zc->card->functions >> 26;
1277 devstat->qid = zq->queue->qid;
1278 devstat->online = zq->online ? 0x01 : 0x00;
1279 spin_unlock(&zcrypt_list_lock);
1284 spin_unlock(&zcrypt_list_lock);
1288 EXPORT_SYMBOL(zcrypt_device_status_ext);
1290 static void zcrypt_status_mask(char status[], size_t max_adapters)
1292 struct zcrypt_card *zc;
1293 struct zcrypt_queue *zq;
1296 memset(status, 0, max_adapters);
1297 spin_lock(&zcrypt_list_lock);
1298 for_each_zcrypt_card(zc) {
1299 for_each_zcrypt_queue(zq, zc) {
1300 card = AP_QID_CARD(zq->queue->qid);
1301 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1302 || card >= max_adapters)
1304 status[card] = zc->online ? zc->user_space_type : 0x0d;
1307 spin_unlock(&zcrypt_list_lock);
1310 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1312 struct zcrypt_card *zc;
1313 struct zcrypt_queue *zq;
1316 memset(qdepth, 0, max_adapters);
1317 spin_lock(&zcrypt_list_lock);
1319 for_each_zcrypt_card(zc) {
1320 for_each_zcrypt_queue(zq, zc) {
1321 card = AP_QID_CARD(zq->queue->qid);
1322 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1323 || card >= max_adapters)
1325 spin_lock(&zq->queue->lock);
1327 zq->queue->pendingq_count +
1328 zq->queue->requestq_count;
1329 spin_unlock(&zq->queue->lock);
1333 spin_unlock(&zcrypt_list_lock);
1336 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1338 struct zcrypt_card *zc;
1339 struct zcrypt_queue *zq;
1343 memset(reqcnt, 0, sizeof(int) * max_adapters);
1344 spin_lock(&zcrypt_list_lock);
1346 for_each_zcrypt_card(zc) {
1347 for_each_zcrypt_queue(zq, zc) {
1348 card = AP_QID_CARD(zq->queue->qid);
1349 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1350 || card >= max_adapters)
1352 spin_lock(&zq->queue->lock);
1353 cnt = zq->queue->total_request_count;
1354 spin_unlock(&zq->queue->lock);
1355 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1359 spin_unlock(&zcrypt_list_lock);
1362 static int zcrypt_pendingq_count(void)
1364 struct zcrypt_card *zc;
1365 struct zcrypt_queue *zq;
1369 spin_lock(&zcrypt_list_lock);
1371 for_each_zcrypt_card(zc) {
1372 for_each_zcrypt_queue(zq, zc) {
1373 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1375 spin_lock(&zq->queue->lock);
1376 pendingq_count += zq->queue->pendingq_count;
1377 spin_unlock(&zq->queue->lock);
1381 spin_unlock(&zcrypt_list_lock);
1382 return pendingq_count;
1385 static int zcrypt_requestq_count(void)
1387 struct zcrypt_card *zc;
1388 struct zcrypt_queue *zq;
1392 spin_lock(&zcrypt_list_lock);
1394 for_each_zcrypt_card(zc) {
1395 for_each_zcrypt_queue(zq, zc) {
1396 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1398 spin_lock(&zq->queue->lock);
1399 requestq_count += zq->queue->requestq_count;
1400 spin_unlock(&zq->queue->lock);
1404 spin_unlock(&zcrypt_list_lock);
1405 return requestq_count;
1408 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1411 struct zcrypt_track tr;
1412 struct ica_rsa_modexpo mex;
1413 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1415 memset(&tr, 0, sizeof(tr));
1416 if (copy_from_user(&mex, umex, sizeof(mex)))
1419 #ifdef CONFIG_ZCRYPT_DEBUG
1420 if (mex.inputdatalength & (1U << 31)) {
1421 if (!capable(CAP_SYS_ADMIN))
1423 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1425 mex.inputdatalength &= 0x0000FFFF;
1429 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1432 #ifdef CONFIG_ZCRYPT_DEBUG
1433 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1436 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1437 /* on failure: retry once again after a requested rescan */
1438 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1440 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1443 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1444 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1447 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1450 return put_user(mex.outputdatalength, &umex->outputdatalength);
1453 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1456 struct zcrypt_track tr;
1457 struct ica_rsa_modexpo_crt crt;
1458 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1460 memset(&tr, 0, sizeof(tr));
1461 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1464 #ifdef CONFIG_ZCRYPT_DEBUG
1465 if (crt.inputdatalength & (1U << 31)) {
1466 if (!capable(CAP_SYS_ADMIN))
1468 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1470 crt.inputdatalength &= 0x0000FFFF;
1474 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1477 #ifdef CONFIG_ZCRYPT_DEBUG
1478 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1481 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1482 /* on failure: retry once again after a requested rescan */
1483 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1485 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1488 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1489 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1492 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1495 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1498 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1501 struct ica_xcRB xcRB;
1502 struct zcrypt_track tr;
1503 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1505 memset(&tr, 0, sizeof(tr));
1506 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1509 #ifdef CONFIG_ZCRYPT_DEBUG
1510 if (xcRB.status & (1U << 31)) {
1511 if (!capable(CAP_SYS_ADMIN))
1513 tr.fi.cmd = (u16)(xcRB.status >> 16);
1515 xcRB.status &= 0x0000FFFF;
1519 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1522 #ifdef CONFIG_ZCRYPT_DEBUG
1523 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1526 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1527 /* on failure: retry once again after a requested rescan */
1528 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1530 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1533 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1534 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1537 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1539 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1544 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1547 struct ep11_urb xcrb;
1548 struct zcrypt_track tr;
1549 struct ep11_urb __user *uxcrb = (void __user *)arg;
1551 memset(&tr, 0, sizeof(tr));
1552 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1555 #ifdef CONFIG_ZCRYPT_DEBUG
1556 if (xcrb.req_len & (1ULL << 63)) {
1557 if (!capable(CAP_SYS_ADMIN))
1559 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1561 xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1565 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1568 #ifdef CONFIG_ZCRYPT_DEBUG
1569 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1572 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1573 /* on failure: retry once again after a requested rescan */
1574 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1576 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1579 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1580 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1583 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1584 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1589 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1593 struct ap_perms *perms =
1594 (struct ap_perms *) filp->private_data;
1596 rc = zcrypt_check_ioctl(perms, cmd);
1602 return icarsamodexpo_ioctl(perms, arg);
1604 return icarsacrt_ioctl(perms, arg);
1606 return zsecsendcprb_ioctl(perms, arg);
1608 return zsendep11cprb_ioctl(perms, arg);
1609 case ZCRYPT_DEVICE_STATUS: {
1610 struct zcrypt_device_status_ext *device_status;
1611 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1612 * sizeof(struct zcrypt_device_status_ext);
1614 device_status = kzalloc(total_size, GFP_KERNEL);
1617 zcrypt_device_status_mask_ext(device_status);
1618 if (copy_to_user((char __user *) arg, device_status,
1621 kfree(device_status);
1624 case ZCRYPT_STATUS_MASK: {
1625 char status[AP_DEVICES];
1627 zcrypt_status_mask(status, AP_DEVICES);
1628 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1632 case ZCRYPT_QDEPTH_MASK: {
1633 char qdepth[AP_DEVICES];
1635 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1636 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1640 case ZCRYPT_PERDEV_REQCNT: {
1643 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1646 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1647 if (copy_to_user((int __user *) arg, reqcnt,
1648 sizeof(u32) * AP_DEVICES))
1653 case Z90STAT_REQUESTQ_COUNT:
1654 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1655 case Z90STAT_PENDINGQ_COUNT:
1656 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1657 case Z90STAT_TOTALOPEN_COUNT:
1658 return put_user(atomic_read(&zcrypt_open_count),
1659 (int __user *) arg);
1660 case Z90STAT_DOMAIN_INDEX:
1661 return put_user(ap_domain_index, (int __user *) arg);
1665 case ZDEVICESTATUS: {
1666 /* the old ioctl supports only 64 adapters */
1667 struct zcrypt_device_status *device_status;
1668 size_t total_size = MAX_ZDEV_ENTRIES
1669 * sizeof(struct zcrypt_device_status);
1671 device_status = kzalloc(total_size, GFP_KERNEL);
1674 zcrypt_device_status_mask(device_status);
1675 if (copy_to_user((char __user *) arg, device_status,
1678 kfree(device_status);
1681 case Z90STAT_STATUS_MASK: {
1682 /* the old ioctl supports only 64 adapters */
1683 char status[MAX_ZDEV_CARDIDS];
1685 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1686 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1690 case Z90STAT_QDEPTH_MASK: {
1691 /* the old ioctl supports only 64 adapters */
1692 char qdepth[MAX_ZDEV_CARDIDS];
1694 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1695 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1699 case Z90STAT_PERDEV_REQCNT: {
1700 /* the old ioctl supports only 64 adapters */
1701 u32 reqcnt[MAX_ZDEV_CARDIDS];
1703 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1704 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1708 /* unknown ioctl number */
1710 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1711 return -ENOIOCTLCMD;
1715 #ifdef CONFIG_COMPAT
1717 * ioctl32 conversion routines
1719 struct compat_ica_rsa_modexpo {
1720 compat_uptr_t inputdata;
1721 unsigned int inputdatalength;
1722 compat_uptr_t outputdata;
1723 unsigned int outputdatalength;
1724 compat_uptr_t b_key;
1725 compat_uptr_t n_modulus;
1728 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1729 unsigned int cmd, unsigned long arg)
1731 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1732 struct compat_ica_rsa_modexpo mex32;
1733 struct ica_rsa_modexpo mex64;
1734 struct zcrypt_track tr;
1737 memset(&tr, 0, sizeof(tr));
1738 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1740 mex64.inputdata = compat_ptr(mex32.inputdata);
1741 mex64.inputdatalength = mex32.inputdatalength;
1742 mex64.outputdata = compat_ptr(mex32.outputdata);
1743 mex64.outputdatalength = mex32.outputdatalength;
1744 mex64.b_key = compat_ptr(mex32.b_key);
1745 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1747 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1750 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1751 /* on failure: retry once again after a requested rescan */
1752 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1754 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1757 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1758 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1762 return put_user(mex64.outputdatalength,
1763 &umex32->outputdatalength);
1766 struct compat_ica_rsa_modexpo_crt {
1767 compat_uptr_t inputdata;
1768 unsigned int inputdatalength;
1769 compat_uptr_t outputdata;
1770 unsigned int outputdatalength;
1771 compat_uptr_t bp_key;
1772 compat_uptr_t bq_key;
1773 compat_uptr_t np_prime;
1774 compat_uptr_t nq_prime;
1775 compat_uptr_t u_mult_inv;
1778 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1779 unsigned int cmd, unsigned long arg)
1781 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1782 struct compat_ica_rsa_modexpo_crt crt32;
1783 struct ica_rsa_modexpo_crt crt64;
1784 struct zcrypt_track tr;
1787 memset(&tr, 0, sizeof(tr));
1788 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1790 crt64.inputdata = compat_ptr(crt32.inputdata);
1791 crt64.inputdatalength = crt32.inputdatalength;
1792 crt64.outputdata = compat_ptr(crt32.outputdata);
1793 crt64.outputdatalength = crt32.outputdatalength;
1794 crt64.bp_key = compat_ptr(crt32.bp_key);
1795 crt64.bq_key = compat_ptr(crt32.bq_key);
1796 crt64.np_prime = compat_ptr(crt32.np_prime);
1797 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1798 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1800 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1803 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1804 /* on failure: retry once again after a requested rescan */
1805 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1807 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1810 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1811 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1815 return put_user(crt64.outputdatalength,
1816 &ucrt32->outputdatalength);
1819 struct compat_ica_xcRB {
1820 unsigned short agent_ID;
1821 unsigned int user_defined;
1822 unsigned short request_ID;
1823 unsigned int request_control_blk_length;
1824 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1825 compat_uptr_t request_control_blk_addr;
1826 unsigned int request_data_length;
1827 char padding2[16 - sizeof(compat_uptr_t)];
1828 compat_uptr_t request_data_address;
1829 unsigned int reply_control_blk_length;
1830 char padding3[16 - sizeof(compat_uptr_t)];
1831 compat_uptr_t reply_control_blk_addr;
1832 unsigned int reply_data_length;
1833 char padding4[16 - sizeof(compat_uptr_t)];
1834 compat_uptr_t reply_data_addr;
1835 unsigned short priority_window;
1836 unsigned int status;
1839 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1840 unsigned int cmd, unsigned long arg)
1842 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1843 struct compat_ica_xcRB xcRB32;
1844 struct zcrypt_track tr;
1845 struct ica_xcRB xcRB64;
1848 memset(&tr, 0, sizeof(tr));
1849 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1851 xcRB64.agent_ID = xcRB32.agent_ID;
1852 xcRB64.user_defined = xcRB32.user_defined;
1853 xcRB64.request_ID = xcRB32.request_ID;
1854 xcRB64.request_control_blk_length =
1855 xcRB32.request_control_blk_length;
1856 xcRB64.request_control_blk_addr =
1857 compat_ptr(xcRB32.request_control_blk_addr);
1858 xcRB64.request_data_length =
1859 xcRB32.request_data_length;
1860 xcRB64.request_data_address =
1861 compat_ptr(xcRB32.request_data_address);
1862 xcRB64.reply_control_blk_length =
1863 xcRB32.reply_control_blk_length;
1864 xcRB64.reply_control_blk_addr =
1865 compat_ptr(xcRB32.reply_control_blk_addr);
1866 xcRB64.reply_data_length = xcRB32.reply_data_length;
1867 xcRB64.reply_data_addr =
1868 compat_ptr(xcRB32.reply_data_addr);
1869 xcRB64.priority_window = xcRB32.priority_window;
1870 xcRB64.status = xcRB32.status;
1872 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1875 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1876 /* on failure: retry once again after a requested rescan */
1877 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1879 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1882 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1883 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1885 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1886 xcRB32.reply_data_length = xcRB64.reply_data_length;
1887 xcRB32.status = xcRB64.status;
1888 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1893 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1897 struct ap_perms *perms =
1898 (struct ap_perms *) filp->private_data;
1900 rc = zcrypt_check_ioctl(perms, cmd);
1904 if (cmd == ICARSAMODEXPO)
1905 return trans_modexpo32(perms, filp, cmd, arg);
1906 if (cmd == ICARSACRT)
1907 return trans_modexpo_crt32(perms, filp, cmd, arg);
1908 if (cmd == ZSECSENDCPRB)
1909 return trans_xcRB32(perms, filp, cmd, arg);
1910 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1915 * Misc device file operations.
1917 static const struct file_operations zcrypt_fops = {
1918 .owner = THIS_MODULE,
1919 .read = zcrypt_read,
1920 .write = zcrypt_write,
1921 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1922 #ifdef CONFIG_COMPAT
1923 .compat_ioctl = zcrypt_compat_ioctl,
1925 .open = zcrypt_open,
1926 .release = zcrypt_release,
1927 .llseek = no_llseek,
1933 static struct miscdevice zcrypt_misc_device = {
1934 .minor = MISC_DYNAMIC_MINOR,
1936 .fops = &zcrypt_fops,
1939 static int zcrypt_rng_device_count;
1940 static u32 *zcrypt_rng_buffer;
1941 static int zcrypt_rng_buffer_index;
1942 static DEFINE_MUTEX(zcrypt_rng_mutex);
1944 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1949 * We don't need locking here because the RNG API guarantees serialized
1950 * read method calls.
1952 if (zcrypt_rng_buffer_index == 0) {
1953 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1954 /* on failure: retry once again after a requested rescan */
1955 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1956 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1959 zcrypt_rng_buffer_index = rc / sizeof(*data);
1961 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1962 return sizeof(*data);
1965 static struct hwrng zcrypt_rng_dev = {
1967 .data_read = zcrypt_rng_data_read,
1971 int zcrypt_rng_device_add(void)
1975 mutex_lock(&zcrypt_rng_mutex);
1976 if (zcrypt_rng_device_count == 0) {
1977 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1978 if (!zcrypt_rng_buffer) {
1982 zcrypt_rng_buffer_index = 0;
1983 if (!zcrypt_hwrng_seed)
1984 zcrypt_rng_dev.quality = 0;
1985 rc = hwrng_register(&zcrypt_rng_dev);
1988 zcrypt_rng_device_count = 1;
1990 zcrypt_rng_device_count++;
1991 mutex_unlock(&zcrypt_rng_mutex);
1995 free_page((unsigned long) zcrypt_rng_buffer);
1997 mutex_unlock(&zcrypt_rng_mutex);
2001 void zcrypt_rng_device_remove(void)
2003 mutex_lock(&zcrypt_rng_mutex);
2004 zcrypt_rng_device_count--;
2005 if (zcrypt_rng_device_count == 0) {
2006 hwrng_unregister(&zcrypt_rng_dev);
2007 free_page((unsigned long) zcrypt_rng_buffer);
2009 mutex_unlock(&zcrypt_rng_mutex);
2012 int __init zcrypt_debug_init(void)
2014 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
2015 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2016 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2017 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2022 void zcrypt_debug_exit(void)
2024 debug_unregister(zcrypt_dbf_info);
2027 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2029 static int __init zcdn_init(void)
2033 /* create a new class 'zcrypt' */
2034 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2035 if (IS_ERR(zcrypt_class)) {
2036 rc = PTR_ERR(zcrypt_class);
2037 goto out_class_create_failed;
2039 zcrypt_class->dev_release = zcdn_device_release;
2041 /* alloc device minor range */
2042 rc = alloc_chrdev_region(&zcrypt_devt,
2043 0, ZCRYPT_MAX_MINOR_NODES,
2046 goto out_alloc_chrdev_failed;
2048 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2049 zcrypt_cdev.owner = THIS_MODULE;
2050 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2052 goto out_cdev_add_failed;
2054 /* need some class specific sysfs attributes */
2055 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2057 goto out_class_create_file_1_failed;
2058 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2060 goto out_class_create_file_2_failed;
2064 out_class_create_file_2_failed:
2065 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2066 out_class_create_file_1_failed:
2067 cdev_del(&zcrypt_cdev);
2068 out_cdev_add_failed:
2069 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2070 out_alloc_chrdev_failed:
2071 class_destroy(zcrypt_class);
2072 out_class_create_failed:
2076 static void zcdn_exit(void)
2078 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2079 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2081 cdev_del(&zcrypt_cdev);
2082 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2083 class_destroy(zcrypt_class);
2089 * zcrypt_api_init(): Module initialization.
2091 * The module initialization code.
2093 int __init zcrypt_api_init(void)
2097 rc = zcrypt_debug_init();
2101 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2107 /* Register the request sprayer. */
2108 rc = misc_register(&zcrypt_misc_device);
2110 goto out_misc_register_failed;
2112 zcrypt_msgtype6_init();
2113 zcrypt_msgtype50_init();
2117 out_misc_register_failed:
2118 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2121 zcrypt_debug_exit();
2127 * zcrypt_api_exit(): Module termination.
2129 * The module termination code.
2131 void __exit zcrypt_api_exit(void)
2133 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2136 misc_deregister(&zcrypt_misc_device);
2137 zcrypt_msgtype6_exit();
2138 zcrypt_msgtype50_exit();
2139 zcrypt_ccamisc_exit();
2140 zcrypt_ep11misc_exit();
2141 zcrypt_debug_exit();
2144 module_init(zcrypt_api_init);
2145 module_exit(zcrypt_api_exit);