3 * drivers/gpu/ion/ion.c
5 * Copyright (C) 2011 Google, Inc.
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 #include <linux/device.h>
19 #include <linux/file.h>
20 #include <linux/freezer.h>
22 #include <linux/anon_inodes.h>
23 #include <linux/kthread.h>
24 #include <linux/list.h>
25 #include <linux/memblock.h>
26 #include <linux/miscdevice.h>
27 #include <linux/export.h>
29 #include <linux/mm_types.h>
30 #include <linux/rbtree.h>
31 #include <linux/slab.h>
32 #include <linux/seq_file.h>
33 #include <linux/uaccess.h>
34 #include <linux/vmalloc.h>
35 #include <linux/debugfs.h>
36 #include <linux/dma-buf.h>
37 #include <linux/idr.h>
38 #include <linux/rockchip_ion.h>
39 #include <linux/dma-contiguous.h>
43 #include "compat_ion.h"
45 #define CREATE_TRACE_POINTS
46 #include "../trace/ion.h"
49 * struct ion_device - the metadata of the ion device node
50 * @dev: the actual misc device
51 * @buffers: an rb tree of all the existing buffers
52 * @buffer_lock: lock protecting the tree of buffers
53 * @lock: rwsem protecting the tree of heaps and clients
54 * @heaps: list of all the heaps in the system
55 * @user_clients: list of all the clients created from userspace
58 struct miscdevice dev;
59 struct rb_root buffers;
60 struct mutex buffer_lock;
61 struct rw_semaphore lock;
62 struct plist_head heaps;
63 long (*custom_ioctl) (struct ion_client *client, unsigned int cmd,
65 struct rb_root clients;
66 struct dentry *debug_root;
67 struct dentry *heaps_debug_root;
68 struct dentry *clients_debug_root;
72 * struct ion_client - a process/hw block local address space
73 * @node: node in the tree of all clients
74 * @dev: backpointer to ion device
75 * @handles: an rb tree of all the handles in this client
76 * @idr: an idr space for allocating handle ids
77 * @lock: lock protecting the tree of handles
78 * @name: used for debugging
79 * @display_name: used for debugging (unique version of @name)
80 * @display_serial: used for debugging (to make display_name unique)
81 * @task: used for debugging
83 * A client represents a list of buffers this client may access.
84 * The mutex stored here is used to protect both handles tree
85 * as well as the handles themselves, and should be held while modifying either.
89 struct ion_device *dev;
90 struct rb_root handles;
96 struct task_struct *task;
98 struct dentry *debug_root;
102 * ion_handle - a client local reference to a buffer
103 * @ref: reference count
104 * @client: back pointer to the client the buffer resides in
105 * @buffer: pointer to the buffer
106 * @node: node in the client's handle rbtree
107 * @kmap_cnt: count of times this client has mapped to kernel
108 * @id: client-unique id allocated by client->idr
110 * Modifications to node, map_cnt or mapping should be protected by the
111 * lock in the client. Other fields are never changed after initialization.
115 struct ion_client *client;
116 struct ion_buffer *buffer;
118 unsigned int kmap_cnt;
122 #ifdef CONFIG_ROCKCHIP_IOMMU
123 static void ion_iommu_force_unmap(struct ion_buffer *buffer);
125 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
126 extern char *rockchip_ion_snapshot_get(size_t *size);
127 extern int rockchip_ion_snapshot_debugfs(struct dentry* root);
128 static int ion_snapshot_save(struct ion_device *idev, size_t len);
131 bool ion_buffer_fault_user_mappings(struct ion_buffer *buffer)
133 return (buffer->flags & ION_FLAG_CACHED) &&
134 !(buffer->flags & ION_FLAG_CACHED_NEEDS_SYNC);
137 bool ion_buffer_cached(struct ion_buffer *buffer)
139 return !!(buffer->flags & ION_FLAG_CACHED);
142 static inline struct page *ion_buffer_page(struct page *page)
144 return (struct page *)((unsigned long)page & ~(1UL));
147 static inline bool ion_buffer_page_is_dirty(struct page *page)
149 return !!((unsigned long)page & 1UL);
152 static inline void ion_buffer_page_dirty(struct page **page)
154 *page = (struct page *)((unsigned long)(*page) | 1UL);
157 static inline void ion_buffer_page_clean(struct page **page)
159 *page = (struct page *)((unsigned long)(*page) & ~(1UL));
162 /* this function should only be called while dev->lock is held */
163 static void ion_buffer_add(struct ion_device *dev,
164 struct ion_buffer *buffer)
166 struct rb_node **p = &dev->buffers.rb_node;
167 struct rb_node *parent = NULL;
168 struct ion_buffer *entry;
172 entry = rb_entry(parent, struct ion_buffer, node);
174 if (buffer < entry) {
176 } else if (buffer > entry) {
179 pr_err("%s: buffer already found.", __func__);
184 rb_link_node(&buffer->node, parent, p);
185 rb_insert_color(&buffer->node, &dev->buffers);
188 /* this function should only be called while dev->lock is held */
189 static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
190 struct ion_device *dev,
195 struct ion_buffer *buffer;
196 struct sg_table *table;
197 struct scatterlist *sg;
200 buffer = kzalloc(sizeof(struct ion_buffer), GFP_KERNEL);
202 return ERR_PTR(-ENOMEM);
205 buffer->flags = flags;
206 kref_init(&buffer->ref);
208 ret = heap->ops->allocate(heap, buffer, len, align, flags);
211 if (!(heap->flags & ION_HEAP_FLAG_DEFER_FREE))
214 ion_heap_freelist_drain(heap, 0);
215 ret = heap->ops->allocate(heap, buffer, len, align,
224 table = heap->ops->map_dma(heap, buffer);
225 if (WARN_ONCE(table == NULL,
226 "heap->ops->map_dma should return ERR_PTR on error"))
227 table = ERR_PTR(-EINVAL);
229 heap->ops->free(buffer);
231 return ERR_PTR(PTR_ERR(table));
233 buffer->sg_table = table;
234 if (ion_buffer_fault_user_mappings(buffer)) {
235 int num_pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
236 struct scatterlist *sg;
239 buffer->pages = vmalloc(sizeof(struct page *) * num_pages);
240 if (!buffer->pages) {
245 for_each_sg(table->sgl, sg, table->nents, i) {
246 struct page *page = sg_page(sg);
248 for (j = 0; j < sg->length / PAGE_SIZE; j++)
249 buffer->pages[k++] = page++;
258 INIT_LIST_HEAD(&buffer->vmas);
259 mutex_init(&buffer->lock);
260 /* this will set up dma addresses for the sglist -- it is not
261 technically correct as per the dma api -- a specific
262 device isn't really taking ownership here. However, in practice on
263 our systems the only dma_address space is physical addresses.
264 Additionally, we can't afford the overhead of invalidating every
265 allocation via dma_map_sg. The implicit contract here is that
266 memory comming from the heaps is ready for dma, ie if it has a
267 cached mapping that mapping has been invalidated */
268 for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i)
269 sg_dma_address(sg) = sg_phys(sg);
270 mutex_lock(&dev->buffer_lock);
271 ion_buffer_add(dev, buffer);
272 mutex_unlock(&dev->buffer_lock);
276 heap->ops->unmap_dma(heap, buffer);
277 heap->ops->free(buffer);
280 vfree(buffer->pages);
286 void ion_buffer_destroy(struct ion_buffer *buffer)
288 trace_ion_buffer_destroy("", (void*)buffer, buffer->size);
290 if (WARN_ON(buffer->kmap_cnt > 0))
291 buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
292 buffer->heap->ops->unmap_dma(buffer->heap, buffer);
293 #ifdef CONFIG_ROCKCHIP_IOMMU
294 ion_iommu_force_unmap(buffer);
296 buffer->heap->ops->free(buffer);
298 vfree(buffer->pages);
302 static void _ion_buffer_destroy(struct kref *kref)
304 struct ion_buffer *buffer = container_of(kref, struct ion_buffer, ref);
305 struct ion_heap *heap = buffer->heap;
306 struct ion_device *dev = buffer->dev;
308 mutex_lock(&dev->buffer_lock);
309 rb_erase(&buffer->node, &dev->buffers);
310 mutex_unlock(&dev->buffer_lock);
312 if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
313 ion_heap_freelist_add(heap, buffer);
315 ion_buffer_destroy(buffer);
318 static void ion_buffer_get(struct ion_buffer *buffer)
320 kref_get(&buffer->ref);
323 static int ion_buffer_put(struct ion_buffer *buffer)
325 return kref_put(&buffer->ref, _ion_buffer_destroy);
328 static void ion_buffer_add_to_handle(struct ion_buffer *buffer)
330 mutex_lock(&buffer->lock);
331 buffer->handle_count++;
332 mutex_unlock(&buffer->lock);
335 static void ion_buffer_remove_from_handle(struct ion_buffer *buffer)
338 * when a buffer is removed from a handle, if it is not in
339 * any other handles, copy the taskcomm and the pid of the
340 * process it's being removed from into the buffer. At this
341 * point there will be no way to track what processes this buffer is
342 * being used by, it only exists as a dma_buf file descriptor.
343 * The taskcomm and pid can provide a debug hint as to where this fd
346 mutex_lock(&buffer->lock);
347 buffer->handle_count--;
348 BUG_ON(buffer->handle_count < 0);
349 if (!buffer->handle_count) {
350 struct task_struct *task;
352 task = current->group_leader;
353 get_task_comm(buffer->task_comm, task);
354 buffer->pid = task_pid_nr(task);
356 mutex_unlock(&buffer->lock);
359 static struct ion_handle *ion_handle_create(struct ion_client *client,
360 struct ion_buffer *buffer)
362 struct ion_handle *handle;
364 handle = kzalloc(sizeof(struct ion_handle), GFP_KERNEL);
366 return ERR_PTR(-ENOMEM);
367 kref_init(&handle->ref);
368 RB_CLEAR_NODE(&handle->node);
369 handle->client = client;
370 ion_buffer_get(buffer);
371 ion_buffer_add_to_handle(buffer);
372 handle->buffer = buffer;
377 static void ion_handle_kmap_put(struct ion_handle *);
379 static void ion_handle_destroy(struct kref *kref)
381 struct ion_handle *handle = container_of(kref, struct ion_handle, ref);
382 struct ion_client *client = handle->client;
383 struct ion_buffer *buffer = handle->buffer;
385 mutex_lock(&buffer->lock);
386 while (handle->kmap_cnt)
387 ion_handle_kmap_put(handle);
388 mutex_unlock(&buffer->lock);
390 idr_remove(&client->idr, handle->id);
391 if (!RB_EMPTY_NODE(&handle->node))
392 rb_erase(&handle->node, &client->handles);
394 ion_buffer_remove_from_handle(buffer);
395 ion_buffer_put(buffer);
400 struct ion_buffer *ion_handle_buffer(struct ion_handle *handle)
402 return handle->buffer;
405 void ion_handle_get(struct ion_handle *handle)
407 kref_get(&handle->ref);
410 int ion_handle_put(struct ion_handle *handle)
412 struct ion_client *client = handle->client;
415 mutex_lock(&client->lock);
416 ret = kref_put(&handle->ref, ion_handle_destroy);
417 mutex_unlock(&client->lock);
422 static struct ion_handle *ion_handle_lookup(struct ion_client *client,
423 struct ion_buffer *buffer)
425 struct rb_node *n = client->handles.rb_node;
428 struct ion_handle *entry = rb_entry(n, struct ion_handle, node);
429 if (buffer < entry->buffer)
431 else if (buffer > entry->buffer)
436 return ERR_PTR(-EINVAL);
439 struct ion_handle *ion_handle_get_by_id(struct ion_client *client,
442 struct ion_handle *handle;
444 mutex_lock(&client->lock);
445 handle = idr_find(&client->idr, id);
447 ion_handle_get(handle);
448 mutex_unlock(&client->lock);
450 return handle ? handle : ERR_PTR(-EINVAL);
453 static bool ion_handle_validate(struct ion_client *client,
454 struct ion_handle *handle)
456 WARN_ON(!mutex_is_locked(&client->lock));
457 return (idr_find(&client->idr, handle->id) == handle);
460 static int ion_handle_add(struct ion_client *client, struct ion_handle *handle)
463 struct rb_node **p = &client->handles.rb_node;
464 struct rb_node *parent = NULL;
465 struct ion_handle *entry;
467 id = idr_alloc(&client->idr, handle, 1, 0, GFP_KERNEL);
475 entry = rb_entry(parent, struct ion_handle, node);
477 if (handle->buffer < entry->buffer)
479 else if (handle->buffer > entry->buffer)
482 WARN(1, "%s: buffer already found.", __func__);
485 rb_link_node(&handle->node, parent, p);
486 rb_insert_color(&handle->node, &client->handles);
491 struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
492 size_t align, unsigned int heap_id_mask,
495 struct ion_handle *handle;
496 struct ion_device *dev = client->dev;
497 struct ion_buffer *buffer = NULL;
498 struct ion_heap *heap;
501 pr_debug("%s: len %zu align %zu heap_id_mask %u flags %x\n", __func__,
502 len, align, heap_id_mask, flags);
504 * traverse the list of heaps available in this system in priority
505 * order. If the heap type is supported by the client, and matches the
506 * request of the caller allocate from it. Repeat until allocate has
507 * succeeded or all heaps have been tried
509 len = PAGE_ALIGN(len);
512 return ERR_PTR(-EINVAL);
514 down_read(&dev->lock);
515 plist_for_each_entry(heap, &dev->heaps, node) {
516 /* if the caller didn't specify this heap id */
517 if (!((1 << heap->id) & heap_id_mask))
519 buffer = ion_buffer_create(heap, dev, len, align, flags);
526 return ERR_PTR(-ENODEV);
528 if (IS_ERR(buffer)) {
529 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
530 ion_snapshot_save(client->dev, len);
532 return ERR_PTR(PTR_ERR(buffer));
535 handle = ion_handle_create(client, buffer);
538 * ion_buffer_create will create a buffer with a ref_cnt of 1,
539 * and ion_handle_create will take a second reference, drop one here
541 ion_buffer_put(buffer);
546 mutex_lock(&client->lock);
547 ret = ion_handle_add(client, handle);
548 mutex_unlock(&client->lock);
550 ion_handle_put(handle);
551 handle = ERR_PTR(ret);
554 trace_ion_buffer_alloc(client->display_name, (void*)buffer,
559 EXPORT_SYMBOL(ion_alloc);
561 void ion_free(struct ion_client *client, struct ion_handle *handle)
565 BUG_ON(client != handle->client);
567 mutex_lock(&client->lock);
568 valid_handle = ion_handle_validate(client, handle);
571 WARN(1, "%s: invalid handle passed to free.\n", __func__);
572 mutex_unlock(&client->lock);
575 mutex_unlock(&client->lock);
576 trace_ion_buffer_free(client->display_name, (void*)handle->buffer,
577 handle->buffer->size);
578 ion_handle_put(handle);
580 EXPORT_SYMBOL(ion_free);
582 int ion_phys(struct ion_client *client, struct ion_handle *handle,
583 ion_phys_addr_t *addr, size_t *len)
585 struct ion_buffer *buffer;
588 mutex_lock(&client->lock);
589 if (!ion_handle_validate(client, handle)) {
590 mutex_unlock(&client->lock);
594 buffer = handle->buffer;
596 if (!buffer->heap->ops->phys) {
597 pr_err("%s: ion_phys is not implemented by this heap.\n",
599 mutex_unlock(&client->lock);
602 mutex_unlock(&client->lock);
603 ret = buffer->heap->ops->phys(buffer->heap, buffer, addr, len);
606 EXPORT_SYMBOL(ion_phys);
608 static void *ion_buffer_kmap_get(struct ion_buffer *buffer)
612 if (buffer->kmap_cnt) {
614 return buffer->vaddr;
616 vaddr = buffer->heap->ops->map_kernel(buffer->heap, buffer);
617 if (WARN_ONCE(vaddr == NULL,
618 "heap->ops->map_kernel should return ERR_PTR on error"))
619 return ERR_PTR(-EINVAL);
622 buffer->vaddr = vaddr;
627 static void *ion_handle_kmap_get(struct ion_handle *handle)
629 struct ion_buffer *buffer = handle->buffer;
632 if (handle->kmap_cnt) {
634 return buffer->vaddr;
636 vaddr = ion_buffer_kmap_get(buffer);
643 static void ion_buffer_kmap_put(struct ion_buffer *buffer)
646 if (!buffer->kmap_cnt) {
647 buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
648 buffer->vaddr = NULL;
652 static void ion_handle_kmap_put(struct ion_handle *handle)
654 struct ion_buffer *buffer = handle->buffer;
657 if (!handle->kmap_cnt)
658 ion_buffer_kmap_put(buffer);
661 void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle)
663 struct ion_buffer *buffer;
666 mutex_lock(&client->lock);
667 if (!ion_handle_validate(client, handle)) {
668 pr_err("%s: invalid handle passed to map_kernel.\n",
670 mutex_unlock(&client->lock);
671 return ERR_PTR(-EINVAL);
674 buffer = handle->buffer;
676 if (!handle->buffer->heap->ops->map_kernel) {
677 pr_err("%s: map_kernel is not implemented by this heap.\n",
679 mutex_unlock(&client->lock);
680 return ERR_PTR(-ENODEV);
683 mutex_lock(&buffer->lock);
684 vaddr = ion_handle_kmap_get(handle);
685 mutex_unlock(&buffer->lock);
686 mutex_unlock(&client->lock);
687 trace_ion_kernel_map(client->display_name, (void*)buffer,
688 buffer->size, (void*)vaddr);
691 EXPORT_SYMBOL(ion_map_kernel);
693 void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle)
695 struct ion_buffer *buffer;
697 mutex_lock(&client->lock);
698 buffer = handle->buffer;
699 mutex_lock(&buffer->lock);
700 trace_ion_kernel_unmap(client->display_name, (void*)buffer,
702 ion_handle_kmap_put(handle);
703 mutex_unlock(&buffer->lock);
704 mutex_unlock(&client->lock);
706 EXPORT_SYMBOL(ion_unmap_kernel);
708 #ifdef CONFIG_ROCKCHIP_IOMMU
709 static void ion_iommu_add(struct ion_buffer *buffer,
710 struct ion_iommu_map *iommu)
712 struct rb_node **p = &buffer->iommu_maps.rb_node;
713 struct rb_node *parent = NULL;
714 struct ion_iommu_map *entry;
718 entry = rb_entry(parent, struct ion_iommu_map, node);
720 if (iommu->key < entry->key) {
722 } else if (iommu->key > entry->key) {
725 pr_err("%s: buffer %p already has mapping for domainid %lx\n",
733 rb_link_node(&iommu->node, parent, p);
734 rb_insert_color(&iommu->node, &buffer->iommu_maps);
737 static struct ion_iommu_map *ion_iommu_lookup(struct ion_buffer *buffer,
740 struct rb_node **p = &buffer->iommu_maps.rb_node;
741 struct rb_node *parent = NULL;
742 struct ion_iommu_map *entry;
746 entry = rb_entry(parent, struct ion_iommu_map, node);
748 if (key < entry->key)
750 else if (key > entry->key)
759 static struct ion_iommu_map *__ion_iommu_map(struct ion_buffer *buffer,
760 struct device *iommu_dev, unsigned long *iova)
762 struct ion_iommu_map *data;
765 data = kmalloc(sizeof(*data), GFP_ATOMIC);
768 return ERR_PTR(-ENOMEM);
770 data->buffer = buffer;
771 data->key = (unsigned long)iommu_dev;
773 ret = buffer->heap->ops->map_iommu(buffer, iommu_dev, data,
774 buffer->size, buffer->flags);
778 kref_init(&data->ref);
779 *iova = data->iova_addr;
781 ion_iommu_add(buffer, data);
790 int ion_map_iommu(struct device *iommu_dev, struct ion_client *client,
791 struct ion_handle *handle, unsigned long *iova, unsigned long *size)
793 struct ion_buffer *buffer;
794 struct ion_iommu_map *iommu_map;
797 mutex_lock(&client->lock);
798 if (!ion_handle_validate(client, handle)) {
799 pr_err("%s: invalid handle passed to map_kernel.\n",
801 mutex_unlock(&client->lock);
805 buffer = handle->buffer;
806 pr_debug("%s: map buffer(%p)\n", __func__, buffer);
808 mutex_lock(&buffer->lock);
810 if (ION_IS_CACHED(buffer->flags)) {
811 pr_err("%s: Cannot map iommu as cached.\n", __func__);
816 if (!handle->buffer->heap->ops->map_iommu) {
817 pr_err("%s: map_iommu is not implemented by this heap.\n",
823 if (buffer->size & ~PAGE_MASK) {
824 pr_debug("%s: buffer size %zu is not aligned to %lx", __func__,
825 buffer->size, PAGE_SIZE);
830 iommu_map = ion_iommu_lookup(buffer, (unsigned long)iommu_dev);
832 pr_debug("%s: create new map for buffer(%p)\n", __func__, buffer);
833 iommu_map = __ion_iommu_map(buffer, iommu_dev, iova);
834 if (IS_ERR(iommu_map))
835 ret = PTR_ERR(iommu_map);
837 pr_debug("%s: buffer(%p) already mapped\n", __func__, buffer);
838 if (iommu_map->mapped_size != buffer->size) {
839 pr_err("%s: handle %p is already mapped with length"
840 " %d, trying to map with length %zu\n",
841 __func__, handle, iommu_map->mapped_size, buffer->size);
844 kref_get(&iommu_map->ref);
845 *iova = iommu_map->iova_addr;
849 buffer->iommu_map_cnt++;
850 *size = buffer->size;
851 trace_ion_iommu_map(client->display_name, (void*)buffer, buffer->size,
852 dev_name(iommu_dev), *iova, *size, buffer->iommu_map_cnt);
854 mutex_unlock(&buffer->lock);
855 mutex_unlock(&client->lock);
858 EXPORT_SYMBOL(ion_map_iommu);
860 static void ion_iommu_release(struct kref *kref)
862 struct ion_iommu_map *map = container_of(kref, struct ion_iommu_map,
864 struct ion_buffer *buffer = map->buffer;
866 trace_ion_iommu_release("", (void*)buffer, buffer->size,
867 "", map->iova_addr, map->mapped_size, buffer->iommu_map_cnt);
869 rb_erase(&map->node, &buffer->iommu_maps);
870 buffer->heap->ops->unmap_iommu((struct device*)map->key, map);
875 * Unmap any outstanding mappings which would otherwise have been leaked.
877 static void ion_iommu_force_unmap(struct ion_buffer *buffer)
879 struct ion_iommu_map *iommu_map;
880 struct rb_node *node;
881 const struct rb_root *rb = &(buffer->iommu_maps);
883 pr_debug("%s: force unmap buffer(%p)\n", __func__, buffer);
885 mutex_lock(&buffer->lock);
887 while ((node = rb_first(rb)) != 0) {
888 iommu_map = rb_entry(node, struct ion_iommu_map, node);
889 /* set ref count to 1 to force release */
890 kref_init(&iommu_map->ref);
891 kref_put(&iommu_map->ref, ion_iommu_release);
894 mutex_unlock(&buffer->lock);
897 void ion_unmap_iommu(struct device *iommu_dev, struct ion_client *client,
898 struct ion_handle *handle)
900 struct ion_iommu_map *iommu_map;
901 struct ion_buffer *buffer;
903 mutex_lock(&client->lock);
904 buffer = handle->buffer;
905 pr_debug("%s: unmap buffer(%p)\n", __func__, buffer);
907 mutex_lock(&buffer->lock);
909 iommu_map = ion_iommu_lookup(buffer, (unsigned long)iommu_dev);
912 WARN(1, "%s: (%p) was never mapped for %p\n", __func__,
917 kref_put(&iommu_map->ref, ion_iommu_release);
919 buffer->iommu_map_cnt--;
921 trace_ion_iommu_unmap(client->display_name, (void*)buffer, buffer->size,
922 dev_name(iommu_dev), iommu_map->iova_addr,
923 iommu_map->mapped_size, buffer->iommu_map_cnt);
925 mutex_unlock(&buffer->lock);
926 mutex_unlock(&client->lock);
928 EXPORT_SYMBOL(ion_unmap_iommu);
930 static int ion_debug_client_show_buffer_map(struct seq_file *s, struct ion_buffer *buffer)
932 struct ion_iommu_map *iommu_map;
933 const struct rb_root *rb;
934 struct rb_node *node;
936 pr_debug("%s: buffer(%p)\n", __func__, buffer);
938 mutex_lock(&buffer->lock);
939 rb = &(buffer->iommu_maps);
942 while (node != NULL) {
943 iommu_map = rb_entry(node, struct ion_iommu_map, node);
944 seq_printf(s, "%16.16s: 0x%08lx 0x%08x 0x%08x %8zuKB %4d\n",
945 "<iommu>", iommu_map->iova_addr, 0, 0,
946 (size_t)iommu_map->mapped_size>>10,
947 atomic_read(&iommu_map->ref.refcount));
949 node = rb_next(node);
952 mutex_unlock(&buffer->lock);
957 int ion_map_iommu(struct device *iommu_dev, struct ion_client *client,
958 struct ion_handle *handle, unsigned long *iova, unsigned long *size)
962 void ion_unmap_iommu(struct device *iommu_dev, struct ion_client *client,
963 struct ion_handle *handle)
968 static int ion_debug_client_show_buffer(struct seq_file *s, void *unused)
970 struct ion_client *client = s->private;
973 seq_printf(s, "----------------------------------------------------\n");
974 seq_printf(s, "%16.s: %12.s %12.s %12.s %10.s %4.s %4.s %4.s\n",
975 "heap_name", "VA", "PA", "IBUF", "size", "HC", "IBR", "IHR");
976 mutex_lock(&client->lock);
977 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
978 struct ion_handle *handle = rb_entry(n, struct ion_handle, node);
979 struct ion_buffer *buffer = handle->buffer;
980 ion_phys_addr_t pa = 0;
981 size_t len = buffer->size;
983 mutex_lock(&buffer->lock);
985 if (buffer->heap->ops->phys)
986 buffer->heap->ops->phys(buffer->heap, buffer, &pa, &len);
988 seq_printf(s, "%16.16s: 0x%08lx 0x%08lx 0x%08lx %8zuKB %4d %4d %4d\n",
989 buffer->heap->name, (unsigned long)buffer->vaddr, pa,
990 (unsigned long)buffer, len>>10, buffer->handle_count,
991 atomic_read(&buffer->ref.refcount),
992 atomic_read(&handle->ref.refcount));
994 mutex_unlock(&buffer->lock);
996 #ifdef CONFIG_ROCKCHIP_IOMMU
997 ion_debug_client_show_buffer_map(s, buffer);
1000 mutex_unlock(&client->lock);
1005 static int ion_debug_client_show(struct seq_file *s, void *unused)
1007 struct ion_client *client = s->private;
1009 size_t sizes[ION_NUM_HEAP_IDS] = {0};
1010 const char *names[ION_NUM_HEAP_IDS] = {NULL};
1013 mutex_lock(&client->lock);
1014 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
1015 struct ion_handle *handle = rb_entry(n, struct ion_handle,
1017 unsigned int id = handle->buffer->heap->id;
1020 names[id] = handle->buffer->heap->name;
1021 sizes[id] += handle->buffer->size;
1023 mutex_unlock(&client->lock);
1025 seq_printf(s, "%16.16s: %16.16s\n", "heap_name", "size_in_bytes");
1026 for (i = 0; i < ION_NUM_HEAP_IDS; i++) {
1029 seq_printf(s, "%16.16s: %16zu\n", names[i], sizes[i]);
1031 ion_debug_client_show_buffer(s, unused);
1035 static int ion_debug_client_open(struct inode *inode, struct file *file)
1037 return single_open(file, ion_debug_client_show, inode->i_private);
1040 static const struct file_operations debug_client_fops = {
1041 .open = ion_debug_client_open,
1043 .llseek = seq_lseek,
1044 .release = single_release,
1047 static int ion_get_client_serial(const struct rb_root *root,
1048 const unsigned char *name)
1051 struct rb_node *node;
1052 for (node = rb_first(root); node; node = rb_next(node)) {
1053 struct ion_client *client = rb_entry(node, struct ion_client,
1055 if (strcmp(client->name, name))
1057 serial = max(serial, client->display_serial);
1062 struct ion_client *ion_client_create(struct ion_device *dev,
1065 struct ion_client *client;
1066 struct task_struct *task;
1068 struct rb_node *parent = NULL;
1069 struct ion_client *entry;
1073 pr_err("%s: Name cannot be null\n", __func__);
1074 return ERR_PTR(-EINVAL);
1077 get_task_struct(current->group_leader);
1078 task_lock(current->group_leader);
1079 pid = task_pid_nr(current->group_leader);
1080 /* don't bother to store task struct for kernel threads,
1081 they can't be killed anyway */
1082 if (current->group_leader->flags & PF_KTHREAD) {
1083 put_task_struct(current->group_leader);
1086 task = current->group_leader;
1088 task_unlock(current->group_leader);
1090 client = kzalloc(sizeof(struct ion_client), GFP_KERNEL);
1092 goto err_put_task_struct;
1095 client->handles = RB_ROOT;
1096 idr_init(&client->idr);
1097 mutex_init(&client->lock);
1098 client->task = task;
1100 client->name = kstrdup(name, GFP_KERNEL);
1102 goto err_free_client;
1104 down_write(&dev->lock);
1105 client->display_serial = ion_get_client_serial(&dev->clients, name);
1106 client->display_name = kasprintf(
1107 GFP_KERNEL, "%s-%d", name, client->display_serial);
1108 if (!client->display_name) {
1109 up_write(&dev->lock);
1110 goto err_free_client_name;
1112 p = &dev->clients.rb_node;
1115 entry = rb_entry(parent, struct ion_client, node);
1119 else if (client > entry)
1120 p = &(*p)->rb_right;
1122 rb_link_node(&client->node, parent, p);
1123 rb_insert_color(&client->node, &dev->clients);
1125 client->debug_root = debugfs_create_file(client->display_name, 0664,
1126 dev->clients_debug_root,
1127 client, &debug_client_fops);
1128 if (!client->debug_root) {
1129 char buf[256], *path;
1130 path = dentry_path(dev->clients_debug_root, buf, 256);
1131 pr_err("Failed to create client debugfs at %s/%s\n",
1132 path, client->display_name);
1135 trace_ion_client_create(client->display_name);
1137 up_write(&dev->lock);
1141 err_free_client_name:
1142 kfree(client->name);
1145 err_put_task_struct:
1147 put_task_struct(current->group_leader);
1148 return ERR_PTR(-ENOMEM);
1150 EXPORT_SYMBOL(ion_client_create);
1152 void ion_client_destroy(struct ion_client *client)
1154 struct ion_device *dev = client->dev;
1157 pr_debug("%s: %d\n", __func__, __LINE__);
1158 while ((n = rb_first(&client->handles))) {
1159 struct ion_handle *handle = rb_entry(n, struct ion_handle,
1161 ion_handle_destroy(&handle->ref);
1164 idr_destroy(&client->idr);
1166 down_write(&dev->lock);
1168 put_task_struct(client->task);
1169 rb_erase(&client->node, &dev->clients);
1170 debugfs_remove_recursive(client->debug_root);
1171 up_write(&dev->lock);
1173 trace_ion_client_destroy(client->display_name);
1175 kfree(client->display_name);
1176 kfree(client->name);
1179 EXPORT_SYMBOL(ion_client_destroy);
1181 struct sg_table *ion_sg_table(struct ion_client *client,
1182 struct ion_handle *handle)
1184 struct ion_buffer *buffer;
1185 struct sg_table *table;
1187 mutex_lock(&client->lock);
1188 if (!ion_handle_validate(client, handle)) {
1189 pr_err("%s: invalid handle passed to map_dma.\n",
1191 mutex_unlock(&client->lock);
1192 return ERR_PTR(-EINVAL);
1194 buffer = handle->buffer;
1195 table = buffer->sg_table;
1196 mutex_unlock(&client->lock);
1199 EXPORT_SYMBOL(ion_sg_table);
1201 static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
1203 enum dma_data_direction direction);
1205 static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment,
1206 enum dma_data_direction direction)
1208 struct dma_buf *dmabuf = attachment->dmabuf;
1209 struct ion_buffer *buffer = dmabuf->priv;
1211 ion_buffer_sync_for_device(buffer, attachment->dev, direction);
1212 return buffer->sg_table;
1215 static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment,
1216 struct sg_table *table,
1217 enum dma_data_direction direction)
1221 void ion_pages_sync_for_device(struct device *dev, struct page *page,
1222 size_t size, enum dma_data_direction dir)
1224 struct scatterlist sg;
1226 sg_init_table(&sg, 1);
1227 sg_set_page(&sg, page, size, 0);
1229 * This is not correct - sg_dma_address needs a dma_addr_t that is valid
1230 * for the the targeted device, but this works on the currently targeted
1233 sg_dma_address(&sg) = page_to_phys(page);
1234 dma_sync_sg_for_device(dev, &sg, 1, dir);
1237 struct ion_vma_list {
1238 struct list_head list;
1239 struct vm_area_struct *vma;
1242 static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
1244 enum dma_data_direction dir)
1246 struct ion_vma_list *vma_list;
1247 int pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
1250 pr_debug("%s: syncing for device %s\n", __func__,
1251 dev ? dev_name(dev) : "null");
1253 if (!ion_buffer_fault_user_mappings(buffer))
1256 mutex_lock(&buffer->lock);
1257 for (i = 0; i < pages; i++) {
1258 struct page *page = buffer->pages[i];
1260 if (ion_buffer_page_is_dirty(page))
1261 ion_pages_sync_for_device(dev, ion_buffer_page(page),
1264 ion_buffer_page_clean(buffer->pages + i);
1266 list_for_each_entry(vma_list, &buffer->vmas, list) {
1267 struct vm_area_struct *vma = vma_list->vma;
1269 zap_page_range(vma, vma->vm_start, vma->vm_end - vma->vm_start,
1272 mutex_unlock(&buffer->lock);
1275 static int ion_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1277 struct ion_buffer *buffer = vma->vm_private_data;
1281 mutex_lock(&buffer->lock);
1282 ion_buffer_page_dirty(buffer->pages + vmf->pgoff);
1283 BUG_ON(!buffer->pages || !buffer->pages[vmf->pgoff]);
1285 pfn = page_to_pfn(ion_buffer_page(buffer->pages[vmf->pgoff]));
1286 ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn);
1287 mutex_unlock(&buffer->lock);
1289 return VM_FAULT_ERROR;
1291 return VM_FAULT_NOPAGE;
1294 static void ion_vm_open(struct vm_area_struct *vma)
1296 struct ion_buffer *buffer = vma->vm_private_data;
1297 struct ion_vma_list *vma_list;
1299 vma_list = kmalloc(sizeof(struct ion_vma_list), GFP_KERNEL);
1302 vma_list->vma = vma;
1303 mutex_lock(&buffer->lock);
1304 list_add(&vma_list->list, &buffer->vmas);
1305 mutex_unlock(&buffer->lock);
1306 pr_debug("%s: adding %p\n", __func__, vma);
1309 static void ion_vm_close(struct vm_area_struct *vma)
1311 struct ion_buffer *buffer = vma->vm_private_data;
1312 struct ion_vma_list *vma_list, *tmp;
1314 pr_debug("%s\n", __func__);
1315 mutex_lock(&buffer->lock);
1316 list_for_each_entry_safe(vma_list, tmp, &buffer->vmas, list) {
1317 if (vma_list->vma != vma)
1319 list_del(&vma_list->list);
1321 pr_debug("%s: deleting %p\n", __func__, vma);
1324 mutex_unlock(&buffer->lock);
1327 static struct vm_operations_struct ion_vma_ops = {
1328 .open = ion_vm_open,
1329 .close = ion_vm_close,
1330 .fault = ion_vm_fault,
1333 static int ion_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
1335 struct ion_buffer *buffer = dmabuf->priv;
1338 if (!buffer->heap->ops->map_user) {
1339 pr_err("%s: this heap does not define a method for mapping "
1340 "to userspace\n", __func__);
1344 if (ion_buffer_fault_user_mappings(buffer)) {
1345 vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND |
1347 vma->vm_private_data = buffer;
1348 vma->vm_ops = &ion_vma_ops;
1353 if (!(buffer->flags & ION_FLAG_CACHED))
1354 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1356 mutex_lock(&buffer->lock);
1357 /* now map it to userspace */
1358 ret = buffer->heap->ops->map_user(buffer->heap, buffer, vma);
1359 mutex_unlock(&buffer->lock);
1362 pr_err("%s: failure mapping buffer to userspace\n",
1365 trace_ion_buffer_mmap("", (unsigned int)buffer, buffer->size,
1366 vma->vm_start, vma->vm_end);
1371 int ion_munmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
1373 struct ion_buffer *buffer = dmabuf->priv;
1375 trace_ion_buffer_munmap("", (unsigned int)buffer, buffer->size,
1376 vma->vm_start, vma->vm_end);
1381 static void ion_dma_buf_release(struct dma_buf *dmabuf)
1383 struct ion_buffer *buffer = dmabuf->priv;
1384 ion_buffer_put(buffer);
1387 static void *ion_dma_buf_kmap(struct dma_buf *dmabuf, unsigned long offset)
1389 struct ion_buffer *buffer = dmabuf->priv;
1390 return buffer->vaddr + offset * PAGE_SIZE;
1393 static void ion_dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long offset,
1399 static int ion_dma_buf_begin_cpu_access(struct dma_buf *dmabuf, size_t start,
1401 enum dma_data_direction direction)
1403 struct ion_buffer *buffer = dmabuf->priv;
1406 if (!buffer->heap->ops->map_kernel) {
1407 pr_err("%s: map kernel is not implemented by this heap.\n",
1412 mutex_lock(&buffer->lock);
1413 vaddr = ion_buffer_kmap_get(buffer);
1414 mutex_unlock(&buffer->lock);
1416 return PTR_ERR(vaddr);
1420 static void ion_dma_buf_end_cpu_access(struct dma_buf *dmabuf, size_t start,
1422 enum dma_data_direction direction)
1424 struct ion_buffer *buffer = dmabuf->priv;
1426 mutex_lock(&buffer->lock);
1427 ion_buffer_kmap_put(buffer);
1428 mutex_unlock(&buffer->lock);
1431 static struct dma_buf_ops dma_buf_ops = {
1432 .map_dma_buf = ion_map_dma_buf,
1433 .unmap_dma_buf = ion_unmap_dma_buf,
1435 .release = ion_dma_buf_release,
1436 .begin_cpu_access = ion_dma_buf_begin_cpu_access,
1437 .end_cpu_access = ion_dma_buf_end_cpu_access,
1438 .kmap_atomic = ion_dma_buf_kmap,
1439 .kunmap_atomic = ion_dma_buf_kunmap,
1440 .kmap = ion_dma_buf_kmap,
1441 .kunmap = ion_dma_buf_kunmap,
1444 struct dma_buf *ion_share_dma_buf(struct ion_client *client,
1445 struct ion_handle *handle)
1447 struct ion_buffer *buffer;
1448 struct dma_buf *dmabuf;
1451 mutex_lock(&client->lock);
1452 valid_handle = ion_handle_validate(client, handle);
1453 if (!valid_handle) {
1454 WARN(1, "%s: invalid handle passed to share.\n", __func__);
1455 mutex_unlock(&client->lock);
1456 return ERR_PTR(-EINVAL);
1458 buffer = handle->buffer;
1459 ion_buffer_get(buffer);
1460 mutex_unlock(&client->lock);
1462 dmabuf = dma_buf_export(buffer, &dma_buf_ops, buffer->size, O_RDWR);
1463 if (IS_ERR(dmabuf)) {
1464 ion_buffer_put(buffer);
1470 EXPORT_SYMBOL(ion_share_dma_buf);
1472 int ion_share_dma_buf_fd(struct ion_client *client, struct ion_handle *handle)
1474 struct dma_buf *dmabuf;
1477 dmabuf = ion_share_dma_buf(client, handle);
1479 return PTR_ERR(dmabuf);
1481 fd = dma_buf_fd(dmabuf, O_CLOEXEC);
1483 dma_buf_put(dmabuf);
1485 trace_ion_buffer_share(client->display_name, (void*)handle->buffer,
1486 handle->buffer->size, fd);
1489 EXPORT_SYMBOL(ion_share_dma_buf_fd);
1491 struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd)
1493 struct dma_buf *dmabuf;
1494 struct ion_buffer *buffer;
1495 struct ion_handle *handle;
1498 dmabuf = dma_buf_get(fd);
1500 return ERR_PTR(PTR_ERR(dmabuf));
1501 /* if this memory came from ion */
1503 if (dmabuf->ops != &dma_buf_ops) {
1504 pr_err("%s: can not import dmabuf from another exporter\n",
1506 dma_buf_put(dmabuf);
1507 return ERR_PTR(-EINVAL);
1509 buffer = dmabuf->priv;
1511 mutex_lock(&client->lock);
1512 /* if a handle exists for this buffer just take a reference to it */
1513 handle = ion_handle_lookup(client, buffer);
1514 if (!IS_ERR(handle)) {
1515 ion_handle_get(handle);
1516 mutex_unlock(&client->lock);
1519 mutex_unlock(&client->lock);
1521 handle = ion_handle_create(client, buffer);
1525 mutex_lock(&client->lock);
1526 ret = ion_handle_add(client, handle);
1527 mutex_unlock(&client->lock);
1529 ion_handle_put(handle);
1530 handle = ERR_PTR(ret);
1533 trace_ion_buffer_import(client->display_name, (void*)buffer,
1536 dma_buf_put(dmabuf);
1539 EXPORT_SYMBOL(ion_import_dma_buf);
1541 static int ion_sync_for_device(struct ion_client *client, int fd)
1543 struct dma_buf *dmabuf;
1544 struct ion_buffer *buffer;
1546 dmabuf = dma_buf_get(fd);
1548 return PTR_ERR(dmabuf);
1550 /* if this memory came from ion */
1551 if (dmabuf->ops != &dma_buf_ops) {
1552 pr_err("%s: can not sync dmabuf from another exporter\n",
1554 dma_buf_put(dmabuf);
1557 buffer = dmabuf->priv;
1559 dma_sync_sg_for_device(NULL, buffer->sg_table->sgl,
1560 buffer->sg_table->nents, DMA_BIDIRECTIONAL);
1561 dma_buf_put(dmabuf);
1565 /* fix up the cases where the ioctl direction bits are incorrect */
1566 static unsigned int ion_ioctl_dir(unsigned int cmd)
1571 case ION_IOC_CUSTOM:
1574 return _IOC_DIR(cmd);
1578 static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1580 struct ion_client *client = filp->private_data;
1581 struct ion_device *dev = client->dev;
1582 struct ion_handle *cleanup_handle = NULL;
1587 struct ion_fd_data fd;
1588 struct ion_allocation_data allocation;
1589 struct ion_handle_data handle;
1590 struct ion_custom_data custom;
1593 dir = ion_ioctl_dir(cmd);
1595 if (_IOC_SIZE(cmd) > sizeof(data))
1598 if (dir & _IOC_WRITE)
1599 if (copy_from_user(&data, (void __user *)arg, _IOC_SIZE(cmd)))
1605 struct ion_handle *handle;
1607 handle = ion_alloc(client, data.allocation.len,
1608 data.allocation.align,
1609 data.allocation.heap_id_mask,
1610 data.allocation.flags);
1612 return PTR_ERR(handle);
1614 data.allocation.handle = handle->id;
1616 cleanup_handle = handle;
1621 struct ion_handle *handle;
1623 handle = ion_handle_get_by_id(client, data.handle.handle);
1625 return PTR_ERR(handle);
1626 ion_free(client, handle);
1627 ion_handle_put(handle);
1633 struct ion_handle *handle;
1635 handle = ion_handle_get_by_id(client, data.handle.handle);
1637 return PTR_ERR(handle);
1638 data.fd.fd = ion_share_dma_buf_fd(client, handle);
1639 ion_handle_put(handle);
1644 case ION_IOC_IMPORT:
1646 struct ion_handle *handle;
1647 handle = ion_import_dma_buf(client, data.fd.fd);
1649 ret = PTR_ERR(handle);
1651 data.handle.handle = handle->id;
1656 ret = ion_sync_for_device(client, data.fd.fd);
1659 case ION_IOC_CUSTOM:
1661 if (!dev->custom_ioctl)
1663 ret = dev->custom_ioctl(client, data.custom.cmd,
1671 if (dir & _IOC_READ) {
1672 if (copy_to_user((void __user *)arg, &data, _IOC_SIZE(cmd))) {
1674 ion_free(client, cleanup_handle);
1681 static int ion_release(struct inode *inode, struct file *file)
1683 struct ion_client *client = file->private_data;
1685 pr_debug("%s: %d\n", __func__, __LINE__);
1686 ion_client_destroy(client);
1690 static int ion_open(struct inode *inode, struct file *file)
1692 struct miscdevice *miscdev = file->private_data;
1693 struct ion_device *dev = container_of(miscdev, struct ion_device, dev);
1694 struct ion_client *client;
1695 char debug_name[64];
1697 pr_debug("%s: %d\n", __func__, __LINE__);
1698 snprintf(debug_name, 64, "%u", task_pid_nr(current->group_leader));
1699 client = ion_client_create(dev, debug_name);
1701 return PTR_ERR(client);
1702 file->private_data = client;
1707 static const struct file_operations ion_fops = {
1708 .owner = THIS_MODULE,
1710 .release = ion_release,
1711 .unlocked_ioctl = ion_ioctl,
1712 .compat_ioctl = compat_ion_ioctl,
1715 static size_t ion_debug_heap_total(struct ion_client *client,
1721 mutex_lock(&client->lock);
1722 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
1723 struct ion_handle *handle = rb_entry(n,
1726 if (handle->buffer->heap->id == id)
1727 size += handle->buffer->size;
1729 mutex_unlock(&client->lock);
1733 static int ion_debug_heap_show(struct seq_file *s, void *unused)
1735 struct ion_heap *heap = s->private;
1736 struct ion_device *dev = heap->dev;
1738 size_t total_size = 0;
1739 size_t total_orphaned_size = 0;
1741 seq_printf(s, "%16.s %16.s %16.s\n", "client", "pid", "size");
1742 seq_printf(s, "----------------------------------------------------\n");
1744 for (n = rb_first(&dev->clients); n; n = rb_next(n)) {
1745 struct ion_client *client = rb_entry(n, struct ion_client,
1747 size_t size = ion_debug_heap_total(client, heap->id);
1751 char task_comm[TASK_COMM_LEN];
1753 get_task_comm(task_comm, client->task);
1754 seq_printf(s, "%16.s %16u %16zu\n", task_comm,
1757 seq_printf(s, "%16.s %16u %16zu\n", client->name,
1761 seq_printf(s, "----------------------------------------------------\n");
1762 seq_printf(s, "orphaned allocations (info is from last known client):"
1764 mutex_lock(&dev->buffer_lock);
1765 for (n = rb_first(&dev->buffers); n; n = rb_next(n)) {
1766 struct ion_buffer *buffer = rb_entry(n, struct ion_buffer,
1768 if (buffer->heap->id != heap->id)
1770 total_size += buffer->size;
1771 if (!buffer->handle_count) {
1772 seq_printf(s, "%16.s %16u %16zu %d %d\n",
1773 buffer->task_comm, buffer->pid,
1774 buffer->size, buffer->kmap_cnt,
1775 atomic_read(&buffer->ref.refcount));
1776 total_orphaned_size += buffer->size;
1779 mutex_unlock(&dev->buffer_lock);
1780 seq_printf(s, "----------------------------------------------------\n");
1781 seq_printf(s, "%16.s %16zu\n", "total orphaned",
1782 total_orphaned_size);
1783 seq_printf(s, "%16.s %16zu\n", "total ", total_size);
1784 if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
1785 seq_printf(s, "%16.s %16zu\n", "deferred free",
1786 heap->free_list_size);
1787 seq_printf(s, "----------------------------------------------------\n");
1789 if (heap->debug_show)
1790 heap->debug_show(heap, s, unused);
1795 static int ion_debug_heap_open(struct inode *inode, struct file *file)
1797 return single_open(file, ion_debug_heap_show, inode->i_private);
1800 static const struct file_operations debug_heap_fops = {
1801 .open = ion_debug_heap_open,
1803 .llseek = seq_lseek,
1804 .release = single_release,
1807 #ifdef DEBUG_HEAP_SHRINKER
1808 static int debug_shrink_set(void *data, u64 val)
1810 struct ion_heap *heap = data;
1811 struct shrink_control sc;
1820 objs = heap->shrinker.shrink(&heap->shrinker, &sc);
1821 sc.nr_to_scan = objs;
1823 heap->shrinker.shrink(&heap->shrinker, &sc);
1827 static int debug_shrink_get(void *data, u64 *val)
1829 struct ion_heap *heap = data;
1830 struct shrink_control sc;
1836 objs = heap->shrinker.shrink(&heap->shrinker, &sc);
1841 DEFINE_SIMPLE_ATTRIBUTE(debug_shrink_fops, debug_shrink_get,
1842 debug_shrink_set, "%llu\n");
1846 // struct "cma" quoted from drivers/base/dma-contiguous.c
1848 unsigned long base_pfn;
1849 unsigned long count;
1850 unsigned long *bitmap;
1853 // struct "ion_cma_heap" quoted from drivers/staging/android/ion/ion_cma_heap.c
1854 struct ion_cma_heap {
1855 struct ion_heap heap;
1859 static int ion_cma_heap_debug_show(struct seq_file *s, void *unused)
1861 struct ion_heap *heap = s->private;
1862 struct ion_cma_heap *cma_heap = container_of(heap,
1863 struct ion_cma_heap,
1865 struct device *dev = cma_heap->dev;
1866 struct cma *cma = dev_get_cma_area(dev);
1868 int rows = cma->count/(SZ_1M >> PAGE_SHIFT);
1869 phys_addr_t base = __pfn_to_phys(cma->base_pfn);
1871 seq_printf(s, "%s Heap bitmap:\n", heap->name);
1873 for(i = rows - 1; i>= 0; i--){
1874 seq_printf(s, "%.4uM@0x%lx: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
1875 i+1, (unsigned long)base+(i)*SZ_1M,
1876 cma->bitmap[i*8 + 7],
1877 cma->bitmap[i*8 + 6],
1878 cma->bitmap[i*8 + 5],
1879 cma->bitmap[i*8 + 4],
1880 cma->bitmap[i*8 + 3],
1881 cma->bitmap[i*8 + 2],
1882 cma->bitmap[i*8 + 1],
1885 seq_printf(s, "Heap size: %luM, Heap base: 0x%lx\n",
1886 (cma->count)>>8, (unsigned long)base);
1891 static int ion_debug_heap_bitmap_open(struct inode *inode, struct file *file)
1893 return single_open(file, ion_cma_heap_debug_show, inode->i_private);
1896 static const struct file_operations debug_heap_bitmap_fops = {
1897 .open = ion_debug_heap_bitmap_open,
1899 .llseek = seq_lseek,
1900 .release = single_release,
1904 void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap)
1906 struct dentry *debug_file;
1908 if (!heap->ops->allocate || !heap->ops->free || !heap->ops->map_dma ||
1909 !heap->ops->unmap_dma)
1910 pr_err("%s: can not add heap with invalid ops struct.\n",
1913 if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
1914 ion_heap_init_deferred_free(heap);
1916 if ((heap->flags & ION_HEAP_FLAG_DEFER_FREE) || heap->ops->shrink)
1917 ion_heap_init_shrinker(heap);
1920 down_write(&dev->lock);
1921 /* use negative heap->id to reverse the priority -- when traversing
1922 the list later attempt higher id numbers first */
1923 plist_node_init(&heap->node, -heap->id);
1924 plist_add(&heap->node, &dev->heaps);
1925 debug_file = debugfs_create_file(heap->name, 0664,
1926 dev->heaps_debug_root, heap,
1930 char buf[256], *path;
1931 path = dentry_path(dev->heaps_debug_root, buf, 256);
1932 pr_err("Failed to create heap debugfs at %s/%s\n",
1936 #ifdef DEBUG_HEAP_SHRINKER
1937 if (heap->shrinker.shrink) {
1938 char debug_name[64];
1940 snprintf(debug_name, 64, "%s_shrink", heap->name);
1941 debug_file = debugfs_create_file(
1942 debug_name, 0644, dev->heaps_debug_root, heap,
1943 &debug_shrink_fops);
1945 char buf[256], *path;
1946 path = dentry_path(dev->heaps_debug_root, buf, 256);
1947 pr_err("Failed to create heap shrinker debugfs at %s/%s\n",
1953 if (ION_HEAP_TYPE_DMA==heap->type) {
1954 char* heap_bitmap_name = kasprintf(
1955 GFP_KERNEL, "%s-bitmap", heap->name);
1956 debug_file = debugfs_create_file(heap_bitmap_name, 0664,
1957 dev->heaps_debug_root, heap,
1958 &debug_heap_bitmap_fops);
1960 char buf[256], *path;
1961 path = dentry_path(dev->heaps_debug_root, buf, 256);
1962 pr_err("Failed to create heap debugfs at %s/%s\n",
1963 path, heap_bitmap_name);
1965 kfree(heap_bitmap_name);
1968 up_write(&dev->lock);
1971 struct ion_device *ion_device_create(long (*custom_ioctl)
1972 (struct ion_client *client,
1976 struct ion_device *idev;
1979 idev = kzalloc(sizeof(struct ion_device), GFP_KERNEL);
1981 return ERR_PTR(-ENOMEM);
1983 idev->dev.minor = MISC_DYNAMIC_MINOR;
1984 idev->dev.name = "ion";
1985 idev->dev.fops = &ion_fops;
1986 idev->dev.parent = NULL;
1987 ret = misc_register(&idev->dev);
1989 pr_err("ion: failed to register misc device.\n");
1990 return ERR_PTR(ret);
1993 idev->debug_root = debugfs_create_dir("ion", NULL);
1994 if (!idev->debug_root) {
1995 pr_err("ion: failed to create debugfs root directory.\n");
1998 idev->heaps_debug_root = debugfs_create_dir("heaps", idev->debug_root);
1999 if (!idev->heaps_debug_root) {
2000 pr_err("ion: failed to create debugfs heaps directory.\n");
2003 idev->clients_debug_root = debugfs_create_dir("clients",
2005 if (!idev->clients_debug_root)
2006 pr_err("ion: failed to create debugfs clients directory.\n");
2008 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
2009 rockchip_ion_snapshot_debugfs(idev->debug_root);
2014 idev->custom_ioctl = custom_ioctl;
2015 idev->buffers = RB_ROOT;
2016 mutex_init(&idev->buffer_lock);
2017 init_rwsem(&idev->lock);
2018 plist_head_init(&idev->heaps);
2019 idev->clients = RB_ROOT;
2023 void ion_device_destroy(struct ion_device *dev)
2025 misc_deregister(&dev->dev);
2026 debugfs_remove_recursive(dev->debug_root);
2027 /* XXX need to free the heaps and clients ? */
2031 void __init ion_reserve(struct ion_platform_data *data)
2035 for (i = 0; i < data->nr; i++) {
2036 if (data->heaps[i].size == 0)
2039 if (data->heaps[i].id==ION_CMA_HEAP_ID) {
2040 struct device *dev = (struct device*)data->heaps[i].priv;
2041 int ret = dma_declare_contiguous(dev,
2042 data->heaps[i].size,
2043 data->heaps[i].base,
2044 MEMBLOCK_ALLOC_ANYWHERE);
2046 pr_err("%s: dma_declare_contiguous failed %d\n",
2050 data->heaps[i].base = PFN_PHYS(dev_get_cma_area(dev)->base_pfn);
2051 } else if (data->heaps[i].base == 0) {
2053 paddr = memblock_alloc_base(data->heaps[i].size,
2054 data->heaps[i].align,
2055 MEMBLOCK_ALLOC_ANYWHERE);
2057 pr_err("%s: error allocating memblock for "
2062 data->heaps[i].base = paddr;
2064 int ret = memblock_reserve(data->heaps[i].base,
2065 data->heaps[i].size);
2067 pr_err("memblock reserve of %zx@%lx failed\n",
2068 data->heaps[i].size,
2069 data->heaps[i].base);
2073 pr_info("%s: %s reserved base %lx size %zu\n", __func__,
2074 data->heaps[i].name,
2075 data->heaps[i].base,
2076 data->heaps[i].size);
2080 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
2082 // Find the maximum can be allocated memory
2083 static unsigned long ion_find_max_zero_area(unsigned long *map, unsigned long size)
2085 unsigned long index, i, zero_sz, max_zero_sz, start;
2090 index = find_next_zero_bit(map, size, start);
2091 if (index>=size) break;
2093 i = find_next_bit(map, size, index);
2095 pr_debug("zero[%lx, %lx]\n", index, zero_sz);
2096 max_zero_sz = max(max_zero_sz, zero_sz);
2098 } while(start<=size);
2100 pr_debug("max_zero_sz=%lx\n", max_zero_sz);
2104 static int ion_snapshot_save(struct ion_device *idev, size_t len)
2106 static struct seq_file seqf;
2107 struct ion_heap *heap;
2110 seqf.buf = rockchip_ion_snapshot_get(&seqf.size);
2114 memset(seqf.buf, 0, seqf.size);
2116 pr_debug("%s: save snapshot 0x%zx@0x%lx\n", __func__, seqf.size,
2117 (unsigned long)__pa(seqf.buf));
2119 seq_printf(&seqf, "call by comm: %s pid: %d, alloc: %zuKB\n",
2120 current->comm, current->pid, len>>10);
2122 down_read(&idev->lock);
2124 plist_for_each_entry(heap, &idev->heaps, node) {
2125 seqf.private = (void*)heap;
2126 seq_printf(&seqf, "++++++++++++++++ HEAP: %s ++++++++++++++++\n",
2128 ion_debug_heap_show(&seqf, NULL);
2129 if (ION_HEAP_TYPE_DMA==heap->type) {
2130 struct ion_cma_heap *cma_heap = container_of(heap,
2131 struct ion_cma_heap,
2133 struct cma *cma = dev_get_cma_area(cma_heap->dev);
2134 seq_printf(&seqf, "\n");
2135 seq_printf(&seqf, "Maximum allocation of pages: %ld\n",
2136 ion_find_max_zero_area(cma->bitmap, cma->count));
2137 seq_printf(&seqf, "\n");
2141 up_read(&idev->lock);