2 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #define pr_fmt(fmt) "%s: " fmt, __func__
21 #include <linux/device.h>
22 #include <linux/kernel.h>
23 #include <linux/bug.h>
24 #include <linux/types.h>
25 #include <linux/module.h>
26 #include <linux/slab.h>
27 #include <linux/errno.h>
28 #include <linux/iommu.h>
29 #include <linux/idr.h>
30 #include <linux/notifier.h>
31 #include <linux/err.h>
32 #include <trace/events/iommu.h>
34 static struct kset
*iommu_group_kset
;
35 static struct ida iommu_group_ida
;
36 static struct mutex iommu_group_mutex
;
40 struct kobject
*devices_kobj
;
41 struct list_head devices
;
43 struct blocking_notifier_head notifier
;
45 void (*iommu_data_release
)(void *iommu_data
);
51 struct list_head list
;
56 struct iommu_group_attribute
{
57 struct attribute attr
;
58 ssize_t (*show
)(struct iommu_group
*group
, char *buf
);
59 ssize_t (*store
)(struct iommu_group
*group
,
60 const char *buf
, size_t count
);
63 #define IOMMU_GROUP_ATTR(_name, _mode, _show, _store) \
64 struct iommu_group_attribute iommu_group_attr_##_name = \
65 __ATTR(_name, _mode, _show, _store)
67 #define to_iommu_group_attr(_attr) \
68 container_of(_attr, struct iommu_group_attribute, attr)
69 #define to_iommu_group(_kobj) \
70 container_of(_kobj, struct iommu_group, kobj)
72 static ssize_t
iommu_group_attr_show(struct kobject
*kobj
,
73 struct attribute
*__attr
, char *buf
)
75 struct iommu_group_attribute
*attr
= to_iommu_group_attr(__attr
);
76 struct iommu_group
*group
= to_iommu_group(kobj
);
80 ret
= attr
->show(group
, buf
);
84 static ssize_t
iommu_group_attr_store(struct kobject
*kobj
,
85 struct attribute
*__attr
,
86 const char *buf
, size_t count
)
88 struct iommu_group_attribute
*attr
= to_iommu_group_attr(__attr
);
89 struct iommu_group
*group
= to_iommu_group(kobj
);
93 ret
= attr
->store(group
, buf
, count
);
97 static const struct sysfs_ops iommu_group_sysfs_ops
= {
98 .show
= iommu_group_attr_show
,
99 .store
= iommu_group_attr_store
,
102 static int iommu_group_create_file(struct iommu_group
*group
,
103 struct iommu_group_attribute
*attr
)
105 return sysfs_create_file(&group
->kobj
, &attr
->attr
);
108 static void iommu_group_remove_file(struct iommu_group
*group
,
109 struct iommu_group_attribute
*attr
)
111 sysfs_remove_file(&group
->kobj
, &attr
->attr
);
114 static ssize_t
iommu_group_show_name(struct iommu_group
*group
, char *buf
)
116 return sprintf(buf
, "%s\n", group
->name
);
119 static IOMMU_GROUP_ATTR(name
, S_IRUGO
, iommu_group_show_name
, NULL
);
121 static void iommu_group_release(struct kobject
*kobj
)
123 struct iommu_group
*group
= to_iommu_group(kobj
);
125 if (group
->iommu_data_release
)
126 group
->iommu_data_release(group
->iommu_data
);
128 mutex_lock(&iommu_group_mutex
);
129 ida_remove(&iommu_group_ida
, group
->id
);
130 mutex_unlock(&iommu_group_mutex
);
136 static struct kobj_type iommu_group_ktype
= {
137 .sysfs_ops
= &iommu_group_sysfs_ops
,
138 .release
= iommu_group_release
,
142 * iommu_group_alloc - Allocate a new group
143 * @name: Optional name to associate with group, visible in sysfs
145 * This function is called by an iommu driver to allocate a new iommu
146 * group. The iommu group represents the minimum granularity of the iommu.
147 * Upon successful return, the caller holds a reference to the supplied
148 * group in order to hold the group until devices are added. Use
149 * iommu_group_put() to release this extra reference count, allowing the
150 * group to be automatically reclaimed once it has no devices or external
153 struct iommu_group
*iommu_group_alloc(void)
155 struct iommu_group
*group
;
158 group
= kzalloc(sizeof(*group
), GFP_KERNEL
);
160 return ERR_PTR(-ENOMEM
);
162 group
->kobj
.kset
= iommu_group_kset
;
163 mutex_init(&group
->mutex
);
164 INIT_LIST_HEAD(&group
->devices
);
165 BLOCKING_INIT_NOTIFIER_HEAD(&group
->notifier
);
167 mutex_lock(&iommu_group_mutex
);
170 if (unlikely(0 == ida_pre_get(&iommu_group_ida
, GFP_KERNEL
))) {
172 mutex_unlock(&iommu_group_mutex
);
173 return ERR_PTR(-ENOMEM
);
176 if (-EAGAIN
== ida_get_new(&iommu_group_ida
, &group
->id
))
179 mutex_unlock(&iommu_group_mutex
);
181 ret
= kobject_init_and_add(&group
->kobj
, &iommu_group_ktype
,
182 NULL
, "%d", group
->id
);
184 mutex_lock(&iommu_group_mutex
);
185 ida_remove(&iommu_group_ida
, group
->id
);
186 mutex_unlock(&iommu_group_mutex
);
191 group
->devices_kobj
= kobject_create_and_add("devices", &group
->kobj
);
192 if (!group
->devices_kobj
) {
193 kobject_put(&group
->kobj
); /* triggers .release & free */
194 return ERR_PTR(-ENOMEM
);
198 * The devices_kobj holds a reference on the group kobject, so
199 * as long as that exists so will the group. We can therefore
200 * use the devices_kobj for reference counting.
202 kobject_put(&group
->kobj
);
206 EXPORT_SYMBOL_GPL(iommu_group_alloc
);
208 struct iommu_group
*iommu_group_get_by_id(int id
)
210 struct kobject
*group_kobj
;
211 struct iommu_group
*group
;
214 if (!iommu_group_kset
)
217 name
= kasprintf(GFP_KERNEL
, "%d", id
);
221 group_kobj
= kset_find_obj(iommu_group_kset
, name
);
227 group
= container_of(group_kobj
, struct iommu_group
, kobj
);
228 BUG_ON(group
->id
!= id
);
230 kobject_get(group
->devices_kobj
);
231 kobject_put(&group
->kobj
);
235 EXPORT_SYMBOL_GPL(iommu_group_get_by_id
);
238 * iommu_group_get_iommudata - retrieve iommu_data registered for a group
241 * iommu drivers can store data in the group for use when doing iommu
242 * operations. This function provides a way to retrieve it. Caller
243 * should hold a group reference.
245 void *iommu_group_get_iommudata(struct iommu_group
*group
)
247 return group
->iommu_data
;
249 EXPORT_SYMBOL_GPL(iommu_group_get_iommudata
);
252 * iommu_group_set_iommudata - set iommu_data for a group
254 * @iommu_data: new data
255 * @release: release function for iommu_data
257 * iommu drivers can store data in the group for use when doing iommu
258 * operations. This function provides a way to set the data after
259 * the group has been allocated. Caller should hold a group reference.
261 void iommu_group_set_iommudata(struct iommu_group
*group
, void *iommu_data
,
262 void (*release
)(void *iommu_data
))
264 group
->iommu_data
= iommu_data
;
265 group
->iommu_data_release
= release
;
267 EXPORT_SYMBOL_GPL(iommu_group_set_iommudata
);
270 * iommu_group_set_name - set name for a group
274 * Allow iommu driver to set a name for a group. When set it will
275 * appear in a name attribute file under the group in sysfs.
277 int iommu_group_set_name(struct iommu_group
*group
, const char *name
)
282 iommu_group_remove_file(group
, &iommu_group_attr_name
);
289 group
->name
= kstrdup(name
, GFP_KERNEL
);
293 ret
= iommu_group_create_file(group
, &iommu_group_attr_name
);
302 EXPORT_SYMBOL_GPL(iommu_group_set_name
);
305 * iommu_group_add_device - add a device to an iommu group
306 * @group: the group into which to add the device (reference should be held)
309 * This function is called by an iommu driver to add a device into a
310 * group. Adding a device increments the group reference count.
312 int iommu_group_add_device(struct iommu_group
*group
, struct device
*dev
)
315 struct iommu_device
*device
;
317 device
= kzalloc(sizeof(*device
), GFP_KERNEL
);
323 ret
= sysfs_create_link(&dev
->kobj
, &group
->kobj
, "iommu_group");
329 device
->name
= kasprintf(GFP_KERNEL
, "%s", kobject_name(&dev
->kobj
));
332 sysfs_remove_link(&dev
->kobj
, "iommu_group");
337 ret
= sysfs_create_link_nowarn(group
->devices_kobj
,
338 &dev
->kobj
, device
->name
);
341 if (ret
== -EEXIST
&& i
>= 0) {
343 * Account for the slim chance of collision
344 * and append an instance to the name.
346 device
->name
= kasprintf(GFP_KERNEL
, "%s.%d",
347 kobject_name(&dev
->kobj
), i
++);
351 sysfs_remove_link(&dev
->kobj
, "iommu_group");
356 kobject_get(group
->devices_kobj
);
358 dev
->iommu_group
= group
;
360 mutex_lock(&group
->mutex
);
361 list_add_tail(&device
->list
, &group
->devices
);
362 mutex_unlock(&group
->mutex
);
364 /* Notify any listeners about change to group. */
365 blocking_notifier_call_chain(&group
->notifier
,
366 IOMMU_GROUP_NOTIFY_ADD_DEVICE
, dev
);
368 trace_add_device_to_group(group
->id
, dev
);
371 EXPORT_SYMBOL_GPL(iommu_group_add_device
);
374 * iommu_group_remove_device - remove a device from it's current group
375 * @dev: device to be removed
377 * This function is called by an iommu driver to remove the device from
378 * it's current group. This decrements the iommu group reference count.
380 void iommu_group_remove_device(struct device
*dev
)
382 struct iommu_group
*group
= dev
->iommu_group
;
383 struct iommu_device
*tmp_device
, *device
= NULL
;
385 /* Pre-notify listeners that a device is being removed. */
386 blocking_notifier_call_chain(&group
->notifier
,
387 IOMMU_GROUP_NOTIFY_DEL_DEVICE
, dev
);
389 mutex_lock(&group
->mutex
);
390 list_for_each_entry(tmp_device
, &group
->devices
, list
) {
391 if (tmp_device
->dev
== dev
) {
393 list_del(&device
->list
);
397 mutex_unlock(&group
->mutex
);
402 sysfs_remove_link(group
->devices_kobj
, device
->name
);
403 sysfs_remove_link(&dev
->kobj
, "iommu_group");
407 dev
->iommu_group
= NULL
;
408 kobject_put(group
->devices_kobj
);
410 EXPORT_SYMBOL_GPL(iommu_group_remove_device
);
413 * iommu_group_for_each_dev - iterate over each device in the group
415 * @data: caller opaque data to be passed to callback function
416 * @fn: caller supplied callback function
418 * This function is called by group users to iterate over group devices.
419 * Callers should hold a reference count to the group during callback.
420 * The group->mutex is held across callbacks, which will block calls to
421 * iommu_group_add/remove_device.
423 int iommu_group_for_each_dev(struct iommu_group
*group
, void *data
,
424 int (*fn
)(struct device
*, void *))
426 struct iommu_device
*device
;
429 mutex_lock(&group
->mutex
);
430 list_for_each_entry(device
, &group
->devices
, list
) {
431 ret
= fn(device
->dev
, data
);
435 mutex_unlock(&group
->mutex
);
438 EXPORT_SYMBOL_GPL(iommu_group_for_each_dev
);
441 * iommu_group_get - Return the group for a device and increment reference
442 * @dev: get the group that this device belongs to
444 * This function is called by iommu drivers and users to get the group
445 * for the specified device. If found, the group is returned and the group
446 * reference in incremented, else NULL.
448 struct iommu_group
*iommu_group_get(struct device
*dev
)
450 struct iommu_group
*group
= dev
->iommu_group
;
453 kobject_get(group
->devices_kobj
);
457 EXPORT_SYMBOL_GPL(iommu_group_get
);
460 * iommu_group_put - Decrement group reference
461 * @group: the group to use
463 * This function is called by iommu drivers and users to release the
464 * iommu group. Once the reference count is zero, the group is released.
466 void iommu_group_put(struct iommu_group
*group
)
469 kobject_put(group
->devices_kobj
);
471 EXPORT_SYMBOL_GPL(iommu_group_put
);
474 * iommu_group_register_notifier - Register a notifier for group changes
475 * @group: the group to watch
476 * @nb: notifier block to signal
478 * This function allows iommu group users to track changes in a group.
479 * See include/linux/iommu.h for actions sent via this notifier. Caller
480 * should hold a reference to the group throughout notifier registration.
482 int iommu_group_register_notifier(struct iommu_group
*group
,
483 struct notifier_block
*nb
)
485 return blocking_notifier_chain_register(&group
->notifier
, nb
);
487 EXPORT_SYMBOL_GPL(iommu_group_register_notifier
);
490 * iommu_group_unregister_notifier - Unregister a notifier
491 * @group: the group to watch
492 * @nb: notifier block to signal
494 * Unregister a previously registered group notifier block.
496 int iommu_group_unregister_notifier(struct iommu_group
*group
,
497 struct notifier_block
*nb
)
499 return blocking_notifier_chain_unregister(&group
->notifier
, nb
);
501 EXPORT_SYMBOL_GPL(iommu_group_unregister_notifier
);
504 * iommu_group_id - Return ID for a group
505 * @group: the group to ID
507 * Return the unique ID for the group matching the sysfs group number.
509 int iommu_group_id(struct iommu_group
*group
)
513 EXPORT_SYMBOL_GPL(iommu_group_id
);
515 static int add_iommu_group(struct device
*dev
, void *data
)
517 struct iommu_ops
*ops
= data
;
519 if (!ops
->add_device
)
522 WARN_ON(dev
->iommu_group
);
524 ops
->add_device(dev
);
529 static int iommu_bus_notifier(struct notifier_block
*nb
,
530 unsigned long action
, void *data
)
532 struct device
*dev
= data
;
533 struct iommu_ops
*ops
= dev
->bus
->iommu_ops
;
534 struct iommu_group
*group
;
535 unsigned long group_action
= 0;
538 * ADD/DEL call into iommu driver ops if provided, which may
539 * result in ADD/DEL notifiers to group->notifier
541 if (action
== BUS_NOTIFY_ADD_DEVICE
) {
543 return ops
->add_device(dev
);
544 } else if (action
== BUS_NOTIFY_DEL_DEVICE
) {
545 if (ops
->remove_device
&& dev
->iommu_group
) {
546 ops
->remove_device(dev
);
552 * Remaining BUS_NOTIFYs get filtered and republished to the
553 * group, if anyone is listening
555 group
= iommu_group_get(dev
);
560 case BUS_NOTIFY_BIND_DRIVER
:
561 group_action
= IOMMU_GROUP_NOTIFY_BIND_DRIVER
;
563 case BUS_NOTIFY_BOUND_DRIVER
:
564 group_action
= IOMMU_GROUP_NOTIFY_BOUND_DRIVER
;
566 case BUS_NOTIFY_UNBIND_DRIVER
:
567 group_action
= IOMMU_GROUP_NOTIFY_UNBIND_DRIVER
;
569 case BUS_NOTIFY_UNBOUND_DRIVER
:
570 group_action
= IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER
;
575 blocking_notifier_call_chain(&group
->notifier
,
578 iommu_group_put(group
);
582 static struct notifier_block iommu_bus_nb
= {
583 .notifier_call
= iommu_bus_notifier
,
586 static void iommu_bus_init(struct bus_type
*bus
, struct iommu_ops
*ops
)
588 bus_register_notifier(bus
, &iommu_bus_nb
);
589 bus_for_each_dev(bus
, NULL
, ops
, add_iommu_group
);
593 * bus_set_iommu - set iommu-callbacks for the bus
595 * @ops: the callbacks provided by the iommu-driver
597 * This function is called by an iommu driver to set the iommu methods
598 * used for a particular bus. Drivers for devices on that bus can use
599 * the iommu-api after these ops are registered.
600 * This special function is needed because IOMMUs are usually devices on
601 * the bus itself, so the iommu drivers are not initialized when the bus
602 * is set up. With this function the iommu-driver can set the iommu-ops
605 int bus_set_iommu(struct bus_type
*bus
, struct iommu_ops
*ops
)
607 if (bus
->iommu_ops
!= NULL
)
610 bus
->iommu_ops
= ops
;
612 /* Do IOMMU specific setup for this bus-type */
613 iommu_bus_init(bus
, ops
);
617 EXPORT_SYMBOL_GPL(bus_set_iommu
);
619 bool iommu_present(struct bus_type
*bus
)
621 return bus
->iommu_ops
!= NULL
;
623 EXPORT_SYMBOL_GPL(iommu_present
);
626 * iommu_set_fault_handler() - set a fault handler for an iommu domain
627 * @domain: iommu domain
628 * @handler: fault handler
629 * @token: user data, will be passed back to the fault handler
631 * This function should be used by IOMMU users which want to be notified
632 * whenever an IOMMU fault happens.
634 * The fault handler itself should return 0 on success, and an appropriate
635 * error code otherwise.
637 void iommu_set_fault_handler(struct iommu_domain
*domain
,
638 iommu_fault_handler_t handler
,
643 domain
->handler
= handler
;
644 domain
->handler_token
= token
;
646 EXPORT_SYMBOL_GPL(iommu_set_fault_handler
);
648 struct iommu_domain
*iommu_domain_alloc(struct bus_type
*bus
)
650 struct iommu_domain
*domain
;
653 if (bus
== NULL
|| bus
->iommu_ops
== NULL
)
656 domain
= kzalloc(sizeof(*domain
), GFP_KERNEL
);
660 domain
->ops
= bus
->iommu_ops
;
662 ret
= domain
->ops
->domain_init(domain
);
673 EXPORT_SYMBOL_GPL(iommu_domain_alloc
);
675 void iommu_domain_free(struct iommu_domain
*domain
)
677 if (likely(domain
->ops
->domain_destroy
!= NULL
))
678 domain
->ops
->domain_destroy(domain
);
682 EXPORT_SYMBOL_GPL(iommu_domain_free
);
684 int iommu_attach_device(struct iommu_domain
*domain
, struct device
*dev
)
686 if (unlikely(domain
->ops
->attach_dev
== NULL
))
689 return domain
->ops
->attach_dev(domain
, dev
);
691 EXPORT_SYMBOL_GPL(iommu_attach_device
);
693 void iommu_detach_device(struct iommu_domain
*domain
, struct device
*dev
)
695 if (unlikely(domain
->ops
->detach_dev
== NULL
))
698 domain
->ops
->detach_dev(domain
, dev
);
700 EXPORT_SYMBOL_GPL(iommu_detach_device
);
703 * IOMMU groups are really the natrual working unit of the IOMMU, but
704 * the IOMMU API works on domains and devices. Bridge that gap by
705 * iterating over the devices in a group. Ideally we'd have a single
706 * device which represents the requestor ID of the group, but we also
707 * allow IOMMU drivers to create policy defined minimum sets, where
708 * the physical hardware may be able to distiguish members, but we
709 * wish to group them at a higher level (ex. untrusted multi-function
710 * PCI devices). Thus we attach each device.
712 static int iommu_group_do_attach_device(struct device
*dev
, void *data
)
714 struct iommu_domain
*domain
= data
;
716 return iommu_attach_device(domain
, dev
);
719 int iommu_attach_group(struct iommu_domain
*domain
, struct iommu_group
*group
)
721 return iommu_group_for_each_dev(group
, domain
,
722 iommu_group_do_attach_device
);
724 EXPORT_SYMBOL_GPL(iommu_attach_group
);
726 static int iommu_group_do_detach_device(struct device
*dev
, void *data
)
728 struct iommu_domain
*domain
= data
;
730 iommu_detach_device(domain
, dev
);
735 void iommu_detach_group(struct iommu_domain
*domain
, struct iommu_group
*group
)
737 iommu_group_for_each_dev(group
, domain
, iommu_group_do_detach_device
);
739 EXPORT_SYMBOL_GPL(iommu_detach_group
);
741 phys_addr_t
iommu_iova_to_phys(struct iommu_domain
*domain
, dma_addr_t iova
)
743 if (unlikely(domain
->ops
->iova_to_phys
== NULL
))
746 return domain
->ops
->iova_to_phys(domain
, iova
);
748 EXPORT_SYMBOL_GPL(iommu_iova_to_phys
);
750 int iommu_domain_has_cap(struct iommu_domain
*domain
,
753 if (unlikely(domain
->ops
->domain_has_cap
== NULL
))
756 return domain
->ops
->domain_has_cap(domain
, cap
);
758 EXPORT_SYMBOL_GPL(iommu_domain_has_cap
);
760 static size_t iommu_pgsize(struct iommu_domain
*domain
,
761 unsigned long addr_merge
, size_t size
)
763 unsigned int pgsize_idx
;
766 /* Max page size that still fits into 'size' */
767 pgsize_idx
= __fls(size
);
769 /* need to consider alignment requirements ? */
770 if (likely(addr_merge
)) {
771 /* Max page size allowed by address */
772 unsigned int align_pgsize_idx
= __ffs(addr_merge
);
773 pgsize_idx
= min(pgsize_idx
, align_pgsize_idx
);
776 /* build a mask of acceptable page sizes */
777 pgsize
= (1UL << (pgsize_idx
+ 1)) - 1;
779 /* throw away page sizes not supported by the hardware */
780 pgsize
&= domain
->ops
->pgsize_bitmap
;
782 /* make sure we're still sane */
785 /* pick the biggest page */
786 pgsize_idx
= __fls(pgsize
);
787 pgsize
= 1UL << pgsize_idx
;
792 int iommu_map(struct iommu_domain
*domain
, unsigned long iova
,
793 phys_addr_t paddr
, size_t size
, int prot
)
795 unsigned long orig_iova
= iova
;
796 unsigned int min_pagesz
;
797 size_t orig_size
= size
;
800 if (unlikely(domain
->ops
->unmap
== NULL
||
801 domain
->ops
->pgsize_bitmap
== 0UL))
804 /* find out the minimum page size supported */
805 min_pagesz
= 1 << __ffs(domain
->ops
->pgsize_bitmap
);
808 * both the virtual address and the physical one, as well as
809 * the size of the mapping, must be aligned (at least) to the
810 * size of the smallest page supported by the hardware
812 if (!IS_ALIGNED(iova
| paddr
| size
, min_pagesz
)) {
813 pr_err("unaligned: iova 0x%lx pa 0x%pa size 0x%zx min_pagesz 0x%x\n",
814 iova
, &paddr
, size
, min_pagesz
);
818 pr_debug("map: iova 0x%lx pa 0x%pa size 0x%zx\n", iova
, &paddr
, size
);
821 size_t pgsize
= iommu_pgsize(domain
, iova
| paddr
, size
);
823 pr_debug("mapping: iova 0x%lx pa 0x%pa pgsize 0x%zx\n",
824 iova
, &paddr
, pgsize
);
826 ret
= domain
->ops
->map(domain
, iova
, paddr
, pgsize
, prot
);
835 /* unroll mapping in case something went wrong */
837 iommu_unmap(domain
, orig_iova
, orig_size
- size
);
841 EXPORT_SYMBOL_GPL(iommu_map
);
843 size_t iommu_unmap(struct iommu_domain
*domain
, unsigned long iova
, size_t size
)
845 size_t unmapped_page
, unmapped
= 0;
846 unsigned int min_pagesz
;
848 if (unlikely(domain
->ops
->unmap
== NULL
||
849 domain
->ops
->pgsize_bitmap
== 0UL))
852 /* find out the minimum page size supported */
853 min_pagesz
= 1 << __ffs(domain
->ops
->pgsize_bitmap
);
856 * The virtual address, as well as the size of the mapping, must be
857 * aligned (at least) to the size of the smallest page supported
860 if (!IS_ALIGNED(iova
| size
, min_pagesz
)) {
861 pr_err("unaligned: iova 0x%lx size 0x%zx min_pagesz 0x%x\n",
862 iova
, size
, min_pagesz
);
866 pr_debug("unmap this: iova 0x%lx size 0x%zx\n", iova
, size
);
869 * Keep iterating until we either unmap 'size' bytes (or more)
870 * or we hit an area that isn't mapped.
872 while (unmapped
< size
) {
873 size_t pgsize
= iommu_pgsize(domain
, iova
, size
- unmapped
);
875 unmapped_page
= domain
->ops
->unmap(domain
, iova
, pgsize
);
879 pr_debug("unmapped: iova 0x%lx size 0x%zx\n",
880 iova
, unmapped_page
);
882 iova
+= unmapped_page
;
883 unmapped
+= unmapped_page
;
888 EXPORT_SYMBOL_GPL(iommu_unmap
);
891 int iommu_domain_window_enable(struct iommu_domain
*domain
, u32 wnd_nr
,
892 phys_addr_t paddr
, u64 size
, int prot
)
894 if (unlikely(domain
->ops
->domain_window_enable
== NULL
))
897 return domain
->ops
->domain_window_enable(domain
, wnd_nr
, paddr
, size
,
900 EXPORT_SYMBOL_GPL(iommu_domain_window_enable
);
902 void iommu_domain_window_disable(struct iommu_domain
*domain
, u32 wnd_nr
)
904 if (unlikely(domain
->ops
->domain_window_disable
== NULL
))
907 return domain
->ops
->domain_window_disable(domain
, wnd_nr
);
909 EXPORT_SYMBOL_GPL(iommu_domain_window_disable
);
911 static int __init
iommu_init(void)
913 iommu_group_kset
= kset_create_and_add("iommu_groups",
915 ida_init(&iommu_group_ida
);
916 mutex_init(&iommu_group_mutex
);
918 BUG_ON(!iommu_group_kset
);
922 arch_initcall(iommu_init
);
924 int iommu_domain_get_attr(struct iommu_domain
*domain
,
925 enum iommu_attr attr
, void *data
)
927 struct iommu_domain_geometry
*geometry
;
933 case DOMAIN_ATTR_GEOMETRY
:
935 *geometry
= domain
->geometry
;
938 case DOMAIN_ATTR_PAGING
:
940 *paging
= (domain
->ops
->pgsize_bitmap
!= 0UL);
942 case DOMAIN_ATTR_WINDOWS
:
945 if (domain
->ops
->domain_get_windows
!= NULL
)
946 *count
= domain
->ops
->domain_get_windows(domain
);
952 if (!domain
->ops
->domain_get_attr
)
955 ret
= domain
->ops
->domain_get_attr(domain
, attr
, data
);
960 EXPORT_SYMBOL_GPL(iommu_domain_get_attr
);
962 int iommu_domain_set_attr(struct iommu_domain
*domain
,
963 enum iommu_attr attr
, void *data
)
969 case DOMAIN_ATTR_WINDOWS
:
972 if (domain
->ops
->domain_set_windows
!= NULL
)
973 ret
= domain
->ops
->domain_set_windows(domain
, *count
);
979 if (domain
->ops
->domain_set_attr
== NULL
)
982 ret
= domain
->ops
->domain_set_attr(domain
, attr
, data
);
987 EXPORT_SYMBOL_GPL(iommu_domain_set_attr
);