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 #ifdef CONFIG_NEED_SG_DMA_LENGTH
271 sg_dma_len(sg) = sg->length;
274 mutex_lock(&dev->buffer_lock);
275 ion_buffer_add(dev, buffer);
276 mutex_unlock(&dev->buffer_lock);
280 heap->ops->unmap_dma(heap, buffer);
281 heap->ops->free(buffer);
284 vfree(buffer->pages);
290 void ion_buffer_destroy(struct ion_buffer *buffer)
292 trace_ion_buffer_destroy("", (void*)buffer, buffer->size);
294 if (WARN_ON(buffer->kmap_cnt > 0))
295 buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
296 buffer->heap->ops->unmap_dma(buffer->heap, buffer);
297 #ifdef CONFIG_ROCKCHIP_IOMMU
298 ion_iommu_force_unmap(buffer);
300 buffer->heap->ops->free(buffer);
302 vfree(buffer->pages);
306 static void _ion_buffer_destroy(struct kref *kref)
308 struct ion_buffer *buffer = container_of(kref, struct ion_buffer, ref);
309 struct ion_heap *heap = buffer->heap;
310 struct ion_device *dev = buffer->dev;
312 mutex_lock(&dev->buffer_lock);
313 rb_erase(&buffer->node, &dev->buffers);
314 mutex_unlock(&dev->buffer_lock);
316 if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
317 ion_heap_freelist_add(heap, buffer);
319 ion_buffer_destroy(buffer);
322 static void ion_buffer_get(struct ion_buffer *buffer)
324 kref_get(&buffer->ref);
327 static int ion_buffer_put(struct ion_buffer *buffer)
329 return kref_put(&buffer->ref, _ion_buffer_destroy);
332 static void ion_buffer_add_to_handle(struct ion_buffer *buffer)
334 mutex_lock(&buffer->lock);
335 buffer->handle_count++;
336 mutex_unlock(&buffer->lock);
339 static void ion_buffer_remove_from_handle(struct ion_buffer *buffer)
342 * when a buffer is removed from a handle, if it is not in
343 * any other handles, copy the taskcomm and the pid of the
344 * process it's being removed from into the buffer. At this
345 * point there will be no way to track what processes this buffer is
346 * being used by, it only exists as a dma_buf file descriptor.
347 * The taskcomm and pid can provide a debug hint as to where this fd
350 mutex_lock(&buffer->lock);
351 buffer->handle_count--;
352 BUG_ON(buffer->handle_count < 0);
353 if (!buffer->handle_count) {
354 struct task_struct *task;
356 task = current->group_leader;
357 get_task_comm(buffer->task_comm, task);
358 buffer->pid = task_pid_nr(task);
360 mutex_unlock(&buffer->lock);
363 static struct ion_handle *ion_handle_create(struct ion_client *client,
364 struct ion_buffer *buffer)
366 struct ion_handle *handle;
368 handle = kzalloc(sizeof(struct ion_handle), GFP_KERNEL);
370 return ERR_PTR(-ENOMEM);
371 kref_init(&handle->ref);
372 RB_CLEAR_NODE(&handle->node);
373 handle->client = client;
374 ion_buffer_get(buffer);
375 ion_buffer_add_to_handle(buffer);
376 handle->buffer = buffer;
381 static void ion_handle_kmap_put(struct ion_handle *);
383 static void ion_handle_destroy(struct kref *kref)
385 struct ion_handle *handle = container_of(kref, struct ion_handle, ref);
386 struct ion_client *client = handle->client;
387 struct ion_buffer *buffer = handle->buffer;
389 mutex_lock(&buffer->lock);
390 while (handle->kmap_cnt)
391 ion_handle_kmap_put(handle);
392 mutex_unlock(&buffer->lock);
394 idr_remove(&client->idr, handle->id);
395 if (!RB_EMPTY_NODE(&handle->node))
396 rb_erase(&handle->node, &client->handles);
398 ion_buffer_remove_from_handle(buffer);
399 ion_buffer_put(buffer);
404 struct ion_buffer *ion_handle_buffer(struct ion_handle *handle)
406 return handle->buffer;
409 void ion_handle_get(struct ion_handle *handle)
411 kref_get(&handle->ref);
414 int ion_handle_put(struct ion_handle *handle)
416 struct ion_client *client = handle->client;
419 mutex_lock(&client->lock);
420 ret = kref_put(&handle->ref, ion_handle_destroy);
421 mutex_unlock(&client->lock);
426 static struct ion_handle *ion_handle_lookup(struct ion_client *client,
427 struct ion_buffer *buffer)
429 struct rb_node *n = client->handles.rb_node;
432 struct ion_handle *entry = rb_entry(n, struct ion_handle, node);
434 if (buffer < entry->buffer)
436 else if (buffer > entry->buffer)
441 return ERR_PTR(-EINVAL);
444 struct ion_handle *ion_handle_get_by_id(struct ion_client *client,
447 struct ion_handle *handle;
449 mutex_lock(&client->lock);
450 handle = idr_find(&client->idr, id);
452 ion_handle_get(handle);
453 mutex_unlock(&client->lock);
455 return handle ? handle : ERR_PTR(-EINVAL);
458 static bool ion_handle_validate(struct ion_client *client,
459 struct ion_handle *handle)
461 WARN_ON(!mutex_is_locked(&client->lock));
462 return (idr_find(&client->idr, handle->id) == handle);
465 static int ion_handle_add(struct ion_client *client, struct ion_handle *handle)
468 struct rb_node **p = &client->handles.rb_node;
469 struct rb_node *parent = NULL;
470 struct ion_handle *entry;
472 id = idr_alloc(&client->idr, handle, 1, 0, GFP_KERNEL);
480 entry = rb_entry(parent, struct ion_handle, node);
482 if (handle->buffer < entry->buffer)
484 else if (handle->buffer > entry->buffer)
487 WARN(1, "%s: buffer already found.", __func__);
490 rb_link_node(&handle->node, parent, p);
491 rb_insert_color(&handle->node, &client->handles);
496 struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
497 size_t align, unsigned int heap_id_mask,
500 struct ion_handle *handle;
501 struct ion_device *dev = client->dev;
502 struct ion_buffer *buffer = NULL;
503 struct ion_heap *heap;
506 pr_debug("%s: len %zu align %zu heap_id_mask %u flags %x\n", __func__,
507 len, align, heap_id_mask, flags);
509 * traverse the list of heaps available in this system in priority
510 * order. If the heap type is supported by the client, and matches the
511 * request of the caller allocate from it. Repeat until allocate has
512 * succeeded or all heaps have been tried
514 len = PAGE_ALIGN(len);
517 return ERR_PTR(-EINVAL);
519 down_read(&dev->lock);
520 plist_for_each_entry(heap, &dev->heaps, node) {
521 /* if the caller didn't specify this heap id */
522 if (!((1 << heap->id) & heap_id_mask))
524 buffer = ion_buffer_create(heap, dev, len, align, flags);
531 return ERR_PTR(-ENODEV);
533 if (IS_ERR(buffer)) {
534 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
535 ion_snapshot_save(client->dev, len);
537 return ERR_PTR(PTR_ERR(buffer));
540 handle = ion_handle_create(client, buffer);
543 * ion_buffer_create will create a buffer with a ref_cnt of 1,
544 * and ion_handle_create will take a second reference, drop one here
546 ion_buffer_put(buffer);
551 mutex_lock(&client->lock);
552 ret = ion_handle_add(client, handle);
553 mutex_unlock(&client->lock);
555 ion_handle_put(handle);
556 handle = ERR_PTR(ret);
559 trace_ion_buffer_alloc(client->display_name, (void*)buffer,
564 EXPORT_SYMBOL(ion_alloc);
566 void ion_free(struct ion_client *client, struct ion_handle *handle)
570 BUG_ON(client != handle->client);
572 mutex_lock(&client->lock);
573 valid_handle = ion_handle_validate(client, handle);
576 WARN(1, "%s: invalid handle passed to free.\n", __func__);
577 mutex_unlock(&client->lock);
580 mutex_unlock(&client->lock);
581 trace_ion_buffer_free(client->display_name, (void*)handle->buffer,
582 handle->buffer->size);
583 ion_handle_put(handle);
585 EXPORT_SYMBOL(ion_free);
587 int ion_phys(struct ion_client *client, struct ion_handle *handle,
588 ion_phys_addr_t *addr, size_t *len)
590 struct ion_buffer *buffer;
593 mutex_lock(&client->lock);
594 if (!ion_handle_validate(client, handle)) {
595 mutex_unlock(&client->lock);
599 buffer = handle->buffer;
601 if (!buffer->heap->ops->phys) {
602 pr_err("%s: ion_phys is not implemented by this heap.\n",
604 mutex_unlock(&client->lock);
607 mutex_unlock(&client->lock);
608 ret = buffer->heap->ops->phys(buffer->heap, buffer, addr, len);
611 EXPORT_SYMBOL(ion_phys);
613 static void *ion_buffer_kmap_get(struct ion_buffer *buffer)
617 if (buffer->kmap_cnt) {
619 return buffer->vaddr;
621 vaddr = buffer->heap->ops->map_kernel(buffer->heap, buffer);
622 if (WARN_ONCE(vaddr == NULL,
623 "heap->ops->map_kernel should return ERR_PTR on error"))
624 return ERR_PTR(-EINVAL);
627 buffer->vaddr = vaddr;
632 static void *ion_handle_kmap_get(struct ion_handle *handle)
634 struct ion_buffer *buffer = handle->buffer;
637 if (handle->kmap_cnt) {
639 return buffer->vaddr;
641 vaddr = ion_buffer_kmap_get(buffer);
648 static void ion_buffer_kmap_put(struct ion_buffer *buffer)
651 if (!buffer->kmap_cnt) {
652 buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
653 buffer->vaddr = NULL;
657 static void ion_handle_kmap_put(struct ion_handle *handle)
659 struct ion_buffer *buffer = handle->buffer;
662 if (!handle->kmap_cnt)
663 ion_buffer_kmap_put(buffer);
666 void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle)
668 struct ion_buffer *buffer;
671 mutex_lock(&client->lock);
672 if (!ion_handle_validate(client, handle)) {
673 pr_err("%s: invalid handle passed to map_kernel.\n",
675 mutex_unlock(&client->lock);
676 return ERR_PTR(-EINVAL);
679 buffer = handle->buffer;
681 if (!handle->buffer->heap->ops->map_kernel) {
682 pr_err("%s: map_kernel is not implemented by this heap.\n",
684 mutex_unlock(&client->lock);
685 return ERR_PTR(-ENODEV);
688 mutex_lock(&buffer->lock);
689 vaddr = ion_handle_kmap_get(handle);
690 mutex_unlock(&buffer->lock);
691 mutex_unlock(&client->lock);
692 trace_ion_kernel_map(client->display_name, (void*)buffer,
693 buffer->size, (void*)vaddr);
696 EXPORT_SYMBOL(ion_map_kernel);
698 void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle)
700 struct ion_buffer *buffer;
702 mutex_lock(&client->lock);
703 buffer = handle->buffer;
704 mutex_lock(&buffer->lock);
705 trace_ion_kernel_unmap(client->display_name, (void*)buffer,
707 ion_handle_kmap_put(handle);
708 mutex_unlock(&buffer->lock);
709 mutex_unlock(&client->lock);
711 EXPORT_SYMBOL(ion_unmap_kernel);
713 #ifdef CONFIG_ROCKCHIP_IOMMU
714 static void ion_iommu_add(struct ion_buffer *buffer,
715 struct ion_iommu_map *iommu)
717 struct rb_node **p = &buffer->iommu_maps.rb_node;
718 struct rb_node *parent = NULL;
719 struct ion_iommu_map *entry;
723 entry = rb_entry(parent, struct ion_iommu_map, node);
725 if (iommu->key < entry->key) {
727 } else if (iommu->key > entry->key) {
730 pr_err("%s: buffer %p already has mapping for domainid %lx\n",
738 rb_link_node(&iommu->node, parent, p);
739 rb_insert_color(&iommu->node, &buffer->iommu_maps);
742 static struct ion_iommu_map *ion_iommu_lookup(struct ion_buffer *buffer,
745 struct rb_node **p = &buffer->iommu_maps.rb_node;
746 struct rb_node *parent = NULL;
747 struct ion_iommu_map *entry;
751 entry = rb_entry(parent, struct ion_iommu_map, node);
753 if (key < entry->key)
755 else if (key > entry->key)
764 static struct ion_iommu_map *__ion_iommu_map(struct ion_buffer *buffer,
765 struct device *iommu_dev, unsigned long *iova)
767 struct ion_iommu_map *data;
770 data = kmalloc(sizeof(*data), GFP_ATOMIC);
773 return ERR_PTR(-ENOMEM);
775 data->buffer = buffer;
776 data->key = (unsigned long)iommu_dev;
778 ret = buffer->heap->ops->map_iommu(buffer, iommu_dev, data,
779 buffer->size, buffer->flags);
783 kref_init(&data->ref);
784 *iova = data->iova_addr;
786 ion_iommu_add(buffer, data);
795 int ion_map_iommu(struct device *iommu_dev, struct ion_client *client,
796 struct ion_handle *handle, unsigned long *iova, unsigned long *size)
798 struct ion_buffer *buffer;
799 struct ion_iommu_map *iommu_map;
802 mutex_lock(&client->lock);
803 if (!ion_handle_validate(client, handle)) {
804 pr_err("%s: invalid handle passed to map_kernel.\n",
806 mutex_unlock(&client->lock);
810 buffer = handle->buffer;
811 pr_debug("%s: map buffer(%p)\n", __func__, buffer);
813 mutex_lock(&buffer->lock);
815 if (!handle->buffer->heap->ops->map_iommu) {
816 pr_err("%s: map_iommu is not implemented by this heap.\n",
822 if (buffer->size & ~PAGE_MASK) {
823 pr_debug("%s: buffer size %zu is not aligned to %lx", __func__,
824 buffer->size, PAGE_SIZE);
829 iommu_map = ion_iommu_lookup(buffer, (unsigned long)iommu_dev);
831 pr_debug("%s: create new map for buffer(%p)\n", __func__, buffer);
832 iommu_map = __ion_iommu_map(buffer, iommu_dev, iova);
833 if (IS_ERR(iommu_map))
834 ret = PTR_ERR(iommu_map);
836 pr_debug("%s: buffer(%p) already mapped\n", __func__, buffer);
837 if (iommu_map->mapped_size != buffer->size) {
838 pr_err("%s: handle %p is already mapped with length"
839 " %d, trying to map with length %zu\n",
840 __func__, handle, iommu_map->mapped_size, buffer->size);
843 kref_get(&iommu_map->ref);
844 *iova = iommu_map->iova_addr;
848 buffer->iommu_map_cnt++;
849 *size = buffer->size;
850 trace_ion_iommu_map(client->display_name, (void*)buffer, buffer->size,
851 dev_name(iommu_dev), *iova, *size, buffer->iommu_map_cnt);
853 mutex_unlock(&buffer->lock);
854 mutex_unlock(&client->lock);
857 EXPORT_SYMBOL(ion_map_iommu);
859 static void ion_iommu_release(struct kref *kref)
861 struct ion_iommu_map *map = container_of(kref, struct ion_iommu_map,
863 struct ion_buffer *buffer = map->buffer;
865 trace_ion_iommu_release("", (void*)buffer, buffer->size,
866 "", map->iova_addr, map->mapped_size, buffer->iommu_map_cnt);
868 rb_erase(&map->node, &buffer->iommu_maps);
869 buffer->heap->ops->unmap_iommu((struct device*)map->key, map);
874 * Unmap any outstanding mappings which would otherwise have been leaked.
876 static void ion_iommu_force_unmap(struct ion_buffer *buffer)
878 struct ion_iommu_map *iommu_map;
879 struct rb_node *node;
880 const struct rb_root *rb = &(buffer->iommu_maps);
882 pr_debug("%s: force unmap buffer(%p)\n", __func__, buffer);
884 mutex_lock(&buffer->lock);
886 while ((node = rb_first(rb)) != 0) {
887 iommu_map = rb_entry(node, struct ion_iommu_map, node);
888 /* set ref count to 1 to force release */
889 kref_init(&iommu_map->ref);
890 kref_put(&iommu_map->ref, ion_iommu_release);
893 mutex_unlock(&buffer->lock);
896 void ion_unmap_iommu(struct device *iommu_dev, struct ion_client *client,
897 struct ion_handle *handle)
899 struct ion_iommu_map *iommu_map;
900 struct ion_buffer *buffer;
902 mutex_lock(&client->lock);
903 buffer = handle->buffer;
904 pr_debug("%s: unmap buffer(%p)\n", __func__, buffer);
906 mutex_lock(&buffer->lock);
908 iommu_map = ion_iommu_lookup(buffer, (unsigned long)iommu_dev);
911 WARN(1, "%s: (%p) was never mapped for %p\n", __func__,
916 buffer->iommu_map_cnt--;
918 trace_ion_iommu_unmap(client->display_name, (void*)buffer, buffer->size,
919 dev_name(iommu_dev), iommu_map->iova_addr,
920 iommu_map->mapped_size, buffer->iommu_map_cnt);
922 kref_put(&iommu_map->ref, ion_iommu_release);
924 mutex_unlock(&buffer->lock);
925 mutex_unlock(&client->lock);
927 EXPORT_SYMBOL(ion_unmap_iommu);
929 static int ion_debug_client_show_buffer_map(struct seq_file *s, struct ion_buffer *buffer)
931 struct ion_iommu_map *iommu_map;
932 const struct rb_root *rb;
933 struct rb_node *node;
935 pr_debug("%s: buffer(%p)\n", __func__, buffer);
937 mutex_lock(&buffer->lock);
938 rb = &(buffer->iommu_maps);
941 while (node != NULL) {
942 iommu_map = rb_entry(node, struct ion_iommu_map, node);
943 seq_printf(s, "%16.16s: 0x%08lx 0x%08x 0x%08x %8zuKB %4d\n",
944 "<iommu>", iommu_map->iova_addr, 0, 0,
945 (size_t)iommu_map->mapped_size>>10,
946 atomic_read(&iommu_map->ref.refcount));
948 node = rb_next(node);
951 mutex_unlock(&buffer->lock);
956 int ion_map_iommu(struct device *iommu_dev, struct ion_client *client,
957 struct ion_handle *handle, unsigned long *iova, unsigned long *size)
961 void ion_unmap_iommu(struct device *iommu_dev, struct ion_client *client,
962 struct ion_handle *handle)
967 static int ion_debug_client_show_buffer(struct seq_file *s, void *unused)
969 struct ion_client *client = s->private;
972 seq_printf(s, "----------------------------------------------------\n");
973 seq_printf(s, "%16.s: %12.s %12.s %12.s %10.s %4.s %4.s %4.s\n",
974 "heap_name", "VA", "PA", "IBUF", "size", "HC", "IBR", "IHR");
975 mutex_lock(&client->lock);
976 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
977 struct ion_handle *handle = rb_entry(n, struct ion_handle, node);
978 struct ion_buffer *buffer = handle->buffer;
979 ion_phys_addr_t pa = 0;
980 size_t len = buffer->size;
982 mutex_lock(&buffer->lock);
984 if (buffer->heap->ops->phys)
985 buffer->heap->ops->phys(buffer->heap, buffer, &pa, &len);
987 seq_printf(s, "%16.16s: 0x%08lx 0x%08lx 0x%08lx %8zuKB %4d %4d %4d\n",
988 buffer->heap->name, (unsigned long)buffer->vaddr, pa,
989 (unsigned long)buffer, len>>10, buffer->handle_count,
990 atomic_read(&buffer->ref.refcount),
991 atomic_read(&handle->ref.refcount));
993 mutex_unlock(&buffer->lock);
995 #ifdef CONFIG_ROCKCHIP_IOMMU
996 ion_debug_client_show_buffer_map(s, buffer);
999 mutex_unlock(&client->lock);
1004 static int ion_debug_client_show(struct seq_file *s, void *unused)
1006 struct ion_client *client = s->private;
1008 size_t sizes[ION_NUM_HEAP_IDS] = {0};
1009 const char *names[ION_NUM_HEAP_IDS] = {NULL};
1012 mutex_lock(&client->lock);
1013 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
1014 struct ion_handle *handle = rb_entry(n, struct ion_handle,
1016 unsigned int id = handle->buffer->heap->id;
1019 names[id] = handle->buffer->heap->name;
1020 sizes[id] += handle->buffer->size;
1022 mutex_unlock(&client->lock);
1024 seq_printf(s, "%16.16s: %16.16s\n", "heap_name", "size_in_bytes");
1025 for (i = 0; i < ION_NUM_HEAP_IDS; i++) {
1028 seq_printf(s, "%16.16s: %16zu\n", names[i], sizes[i]);
1030 ion_debug_client_show_buffer(s, unused);
1034 static int ion_debug_client_open(struct inode *inode, struct file *file)
1036 return single_open(file, ion_debug_client_show, inode->i_private);
1039 static const struct file_operations debug_client_fops = {
1040 .open = ion_debug_client_open,
1042 .llseek = seq_lseek,
1043 .release = single_release,
1046 static int ion_get_client_serial(const struct rb_root *root,
1047 const unsigned char *name)
1050 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,
1056 if (strcmp(client->name, name))
1058 serial = max(serial, client->display_serial);
1063 struct ion_client *ion_client_create(struct ion_device *dev,
1066 struct ion_client *client;
1067 struct task_struct *task;
1069 struct rb_node *parent = NULL;
1070 struct ion_client *entry;
1074 pr_err("%s: Name cannot be null\n", __func__);
1075 return ERR_PTR(-EINVAL);
1078 get_task_struct(current->group_leader);
1079 task_lock(current->group_leader);
1080 pid = task_pid_nr(current->group_leader);
1081 /* don't bother to store task struct for kernel threads,
1082 they can't be killed anyway */
1083 if (current->group_leader->flags & PF_KTHREAD) {
1084 put_task_struct(current->group_leader);
1087 task = current->group_leader;
1089 task_unlock(current->group_leader);
1091 client = kzalloc(sizeof(struct ion_client), GFP_KERNEL);
1093 goto err_put_task_struct;
1096 client->handles = RB_ROOT;
1097 idr_init(&client->idr);
1098 mutex_init(&client->lock);
1099 client->task = task;
1101 client->name = kstrdup(name, GFP_KERNEL);
1103 goto err_free_client;
1105 down_write(&dev->lock);
1106 client->display_serial = ion_get_client_serial(&dev->clients, name);
1107 client->display_name = kasprintf(
1108 GFP_KERNEL, "%s-%d", name, client->display_serial);
1109 if (!client->display_name) {
1110 up_write(&dev->lock);
1111 goto err_free_client_name;
1113 p = &dev->clients.rb_node;
1116 entry = rb_entry(parent, struct ion_client, node);
1120 else if (client > entry)
1121 p = &(*p)->rb_right;
1123 rb_link_node(&client->node, parent, p);
1124 rb_insert_color(&client->node, &dev->clients);
1126 client->debug_root = debugfs_create_file(client->display_name, 0664,
1127 dev->clients_debug_root,
1128 client, &debug_client_fops);
1129 if (!client->debug_root) {
1130 char buf[256], *path;
1131 path = dentry_path(dev->clients_debug_root, buf, 256);
1132 pr_err("Failed to create client debugfs at %s/%s\n",
1133 path, client->display_name);
1136 trace_ion_client_create(client->display_name);
1138 up_write(&dev->lock);
1142 err_free_client_name:
1143 kfree(client->name);
1146 err_put_task_struct:
1148 put_task_struct(current->group_leader);
1149 return ERR_PTR(-ENOMEM);
1151 EXPORT_SYMBOL(ion_client_create);
1153 void ion_client_destroy(struct ion_client *client)
1155 struct ion_device *dev = client->dev;
1158 pr_debug("%s: %d\n", __func__, __LINE__);
1159 while ((n = rb_first(&client->handles))) {
1160 struct ion_handle *handle = rb_entry(n, struct ion_handle,
1162 ion_handle_destroy(&handle->ref);
1165 idr_destroy(&client->idr);
1167 down_write(&dev->lock);
1169 put_task_struct(client->task);
1170 rb_erase(&client->node, &dev->clients);
1171 debugfs_remove_recursive(client->debug_root);
1172 up_write(&dev->lock);
1174 trace_ion_client_destroy(client->display_name);
1176 kfree(client->display_name);
1177 kfree(client->name);
1180 EXPORT_SYMBOL(ion_client_destroy);
1182 struct sg_table *ion_sg_table(struct ion_client *client,
1183 struct ion_handle *handle)
1185 struct ion_buffer *buffer;
1186 struct sg_table *table;
1188 mutex_lock(&client->lock);
1189 if (!ion_handle_validate(client, handle)) {
1190 pr_err("%s: invalid handle passed to map_dma.\n",
1192 mutex_unlock(&client->lock);
1193 return ERR_PTR(-EINVAL);
1195 buffer = handle->buffer;
1196 table = buffer->sg_table;
1197 mutex_unlock(&client->lock);
1200 EXPORT_SYMBOL(ion_sg_table);
1202 static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
1204 enum dma_data_direction direction);
1206 static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment,
1207 enum dma_data_direction direction)
1209 struct dma_buf *dmabuf = attachment->dmabuf;
1210 struct ion_buffer *buffer = dmabuf->priv;
1212 ion_buffer_sync_for_device(buffer, attachment->dev, direction);
1213 return buffer->sg_table;
1216 static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment,
1217 struct sg_table *table,
1218 enum dma_data_direction direction)
1222 void ion_pages_sync_for_device(struct device *dev, struct page *page,
1223 size_t size, enum dma_data_direction dir)
1225 struct scatterlist sg;
1227 sg_init_table(&sg, 1);
1228 sg_set_page(&sg, page, size, 0);
1230 * This is not correct - sg_dma_address needs a dma_addr_t that is valid
1231 * for the the targeted device, but this works on the currently targeted
1234 sg_dma_address(&sg) = page_to_phys(page);
1235 dma_sync_sg_for_device(dev, &sg, 1, dir);
1238 struct ion_vma_list {
1239 struct list_head list;
1240 struct vm_area_struct *vma;
1243 static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
1245 enum dma_data_direction dir)
1247 struct ion_vma_list *vma_list;
1248 int pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
1251 pr_debug("%s: syncing for device %s\n", __func__,
1252 dev ? dev_name(dev) : "null");
1254 if (!ion_buffer_fault_user_mappings(buffer))
1257 mutex_lock(&buffer->lock);
1258 for (i = 0; i < pages; i++) {
1259 struct page *page = buffer->pages[i];
1261 if (ion_buffer_page_is_dirty(page))
1262 ion_pages_sync_for_device(dev, ion_buffer_page(page),
1265 ion_buffer_page_clean(buffer->pages + i);
1267 list_for_each_entry(vma_list, &buffer->vmas, list) {
1268 struct vm_area_struct *vma = vma_list->vma;
1270 zap_page_range(vma, vma->vm_start, vma->vm_end - vma->vm_start,
1273 mutex_unlock(&buffer->lock);
1276 static int ion_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1278 struct ion_buffer *buffer = vma->vm_private_data;
1282 mutex_lock(&buffer->lock);
1283 ion_buffer_page_dirty(buffer->pages + vmf->pgoff);
1284 BUG_ON(!buffer->pages || !buffer->pages[vmf->pgoff]);
1286 pfn = page_to_pfn(ion_buffer_page(buffer->pages[vmf->pgoff]));
1287 ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn);
1288 mutex_unlock(&buffer->lock);
1290 return VM_FAULT_ERROR;
1292 return VM_FAULT_NOPAGE;
1295 static void ion_vm_open(struct vm_area_struct *vma)
1297 struct ion_buffer *buffer = vma->vm_private_data;
1298 struct ion_vma_list *vma_list;
1300 vma_list = kmalloc(sizeof(struct ion_vma_list), GFP_KERNEL);
1303 vma_list->vma = vma;
1304 mutex_lock(&buffer->lock);
1305 list_add(&vma_list->list, &buffer->vmas);
1306 mutex_unlock(&buffer->lock);
1307 pr_debug("%s: adding %p\n", __func__, vma);
1310 static void ion_vm_close(struct vm_area_struct *vma)
1312 struct ion_buffer *buffer = vma->vm_private_data;
1313 struct ion_vma_list *vma_list, *tmp;
1315 pr_debug("%s\n", __func__);
1316 mutex_lock(&buffer->lock);
1317 list_for_each_entry_safe(vma_list, tmp, &buffer->vmas, list) {
1318 if (vma_list->vma != vma)
1320 list_del(&vma_list->list);
1322 pr_debug("%s: deleting %p\n", __func__, vma);
1325 mutex_unlock(&buffer->lock);
1328 static struct vm_operations_struct ion_vma_ops = {
1329 .open = ion_vm_open,
1330 .close = ion_vm_close,
1331 .fault = ion_vm_fault,
1334 static int ion_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
1336 struct ion_buffer *buffer = dmabuf->priv;
1339 if (!buffer->heap->ops->map_user) {
1340 pr_err("%s: this heap does not define a method for mapping "
1341 "to userspace\n", __func__);
1345 if (ion_buffer_fault_user_mappings(buffer)) {
1346 vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND |
1348 vma->vm_private_data = buffer;
1349 vma->vm_ops = &ion_vma_ops;
1354 if (!(buffer->flags & ION_FLAG_CACHED))
1355 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1357 mutex_lock(&buffer->lock);
1358 /* now map it to userspace */
1359 ret = buffer->heap->ops->map_user(buffer->heap, buffer, vma);
1360 mutex_unlock(&buffer->lock);
1363 pr_err("%s: failure mapping buffer to userspace\n",
1366 trace_ion_buffer_mmap("", (void*)buffer, buffer->size,
1367 vma->vm_start, vma->vm_end);
1372 int ion_munmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
1374 struct ion_buffer *buffer = dmabuf->priv;
1376 trace_ion_buffer_munmap("", (void*)buffer, buffer->size,
1377 vma->vm_start, vma->vm_end);
1382 static void ion_dma_buf_release(struct dma_buf *dmabuf)
1384 struct ion_buffer *buffer = dmabuf->priv;
1386 ion_buffer_put(buffer);
1389 static void *ion_dma_buf_kmap(struct dma_buf *dmabuf, unsigned long offset)
1391 struct ion_buffer *buffer = dmabuf->priv;
1393 return buffer->vaddr + offset * PAGE_SIZE;
1396 static void ion_dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long offset,
1402 static int ion_dma_buf_begin_cpu_access(struct dma_buf *dmabuf, size_t start,
1404 enum dma_data_direction direction)
1406 struct ion_buffer *buffer = dmabuf->priv;
1409 if (!buffer->heap->ops->map_kernel) {
1410 pr_err("%s: map kernel is not implemented by this heap.\n",
1415 mutex_lock(&buffer->lock);
1416 vaddr = ion_buffer_kmap_get(buffer);
1417 mutex_unlock(&buffer->lock);
1419 return PTR_ERR(vaddr);
1423 static void ion_dma_buf_end_cpu_access(struct dma_buf *dmabuf, size_t start,
1425 enum dma_data_direction direction)
1427 struct ion_buffer *buffer = dmabuf->priv;
1429 mutex_lock(&buffer->lock);
1430 ion_buffer_kmap_put(buffer);
1431 mutex_unlock(&buffer->lock);
1434 static struct dma_buf_ops dma_buf_ops = {
1435 .map_dma_buf = ion_map_dma_buf,
1436 .unmap_dma_buf = ion_unmap_dma_buf,
1438 .release = ion_dma_buf_release,
1439 .begin_cpu_access = ion_dma_buf_begin_cpu_access,
1440 .end_cpu_access = ion_dma_buf_end_cpu_access,
1441 .kmap_atomic = ion_dma_buf_kmap,
1442 .kunmap_atomic = ion_dma_buf_kunmap,
1443 .kmap = ion_dma_buf_kmap,
1444 .kunmap = ion_dma_buf_kunmap,
1447 struct dma_buf *ion_share_dma_buf(struct ion_client *client,
1448 struct ion_handle *handle)
1450 struct ion_buffer *buffer;
1451 struct dma_buf *dmabuf;
1454 mutex_lock(&client->lock);
1455 valid_handle = ion_handle_validate(client, handle);
1456 if (!valid_handle) {
1457 WARN(1, "%s: invalid handle passed to share.\n", __func__);
1458 mutex_unlock(&client->lock);
1459 return ERR_PTR(-EINVAL);
1461 buffer = handle->buffer;
1462 ion_buffer_get(buffer);
1463 mutex_unlock(&client->lock);
1465 dmabuf = dma_buf_export(buffer, &dma_buf_ops, buffer->size, O_RDWR);
1466 if (IS_ERR(dmabuf)) {
1467 ion_buffer_put(buffer);
1473 EXPORT_SYMBOL(ion_share_dma_buf);
1475 int ion_share_dma_buf_fd(struct ion_client *client, struct ion_handle *handle)
1477 struct dma_buf *dmabuf;
1480 dmabuf = ion_share_dma_buf(client, handle);
1482 return PTR_ERR(dmabuf);
1484 fd = dma_buf_fd(dmabuf, O_CLOEXEC);
1486 dma_buf_put(dmabuf);
1488 trace_ion_buffer_share(client->display_name, (void*)handle->buffer,
1489 handle->buffer->size, fd);
1492 EXPORT_SYMBOL(ion_share_dma_buf_fd);
1494 struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd)
1496 struct dma_buf *dmabuf;
1497 struct ion_buffer *buffer;
1498 struct ion_handle *handle;
1501 dmabuf = dma_buf_get(fd);
1503 return ERR_PTR(PTR_ERR(dmabuf));
1504 /* if this memory came from ion */
1506 if (dmabuf->ops != &dma_buf_ops) {
1507 pr_err("%s: can not import dmabuf from another exporter\n",
1509 dma_buf_put(dmabuf);
1510 return ERR_PTR(-EINVAL);
1512 buffer = dmabuf->priv;
1514 mutex_lock(&client->lock);
1515 /* if a handle exists for this buffer just take a reference to it */
1516 handle = ion_handle_lookup(client, buffer);
1517 if (!IS_ERR(handle)) {
1518 ion_handle_get(handle);
1519 mutex_unlock(&client->lock);
1523 handle = ion_handle_create(client, buffer);
1524 if (IS_ERR(handle)) {
1525 mutex_unlock(&client->lock);
1529 ret = ion_handle_add(client, handle);
1530 mutex_unlock(&client->lock);
1532 ion_handle_put(handle);
1533 handle = ERR_PTR(ret);
1536 trace_ion_buffer_import(client->display_name, (void*)buffer,
1539 dma_buf_put(dmabuf);
1542 EXPORT_SYMBOL(ion_import_dma_buf);
1544 static int ion_sync_for_device(struct ion_client *client, int fd)
1546 struct dma_buf *dmabuf;
1547 struct ion_buffer *buffer;
1549 dmabuf = dma_buf_get(fd);
1551 return PTR_ERR(dmabuf);
1553 /* if this memory came from ion */
1554 if (dmabuf->ops != &dma_buf_ops) {
1555 pr_err("%s: can not sync dmabuf from another exporter\n",
1557 dma_buf_put(dmabuf);
1560 buffer = dmabuf->priv;
1562 dma_sync_sg_for_device(NULL, buffer->sg_table->sgl,
1563 buffer->sg_table->nents, DMA_BIDIRECTIONAL);
1564 dma_buf_put(dmabuf);
1568 /* fix up the cases where the ioctl direction bits are incorrect */
1569 static unsigned int ion_ioctl_dir(unsigned int cmd)
1574 case ION_IOC_CUSTOM:
1577 return _IOC_DIR(cmd);
1581 static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1583 struct ion_client *client = filp->private_data;
1584 struct ion_device *dev = client->dev;
1585 struct ion_handle *cleanup_handle = NULL;
1590 struct ion_fd_data fd;
1591 struct ion_allocation_data allocation;
1592 struct ion_handle_data handle;
1593 struct ion_custom_data custom;
1596 dir = ion_ioctl_dir(cmd);
1598 if (_IOC_SIZE(cmd) > sizeof(data))
1601 if (dir & _IOC_WRITE)
1602 if (copy_from_user(&data, (void __user *)arg, _IOC_SIZE(cmd)))
1608 struct ion_handle *handle;
1610 handle = ion_alloc(client, data.allocation.len,
1611 data.allocation.align,
1612 data.allocation.heap_id_mask,
1613 data.allocation.flags);
1615 return PTR_ERR(handle);
1617 data.allocation.handle = handle->id;
1619 cleanup_handle = handle;
1624 struct ion_handle *handle;
1626 handle = ion_handle_get_by_id(client, data.handle.handle);
1628 return PTR_ERR(handle);
1629 ion_free(client, handle);
1630 ion_handle_put(handle);
1636 struct ion_handle *handle;
1638 handle = ion_handle_get_by_id(client, data.handle.handle);
1640 return PTR_ERR(handle);
1641 data.fd.fd = ion_share_dma_buf_fd(client, handle);
1642 ion_handle_put(handle);
1647 case ION_IOC_IMPORT:
1649 struct ion_handle *handle;
1651 handle = ion_import_dma_buf(client, data.fd.fd);
1653 ret = PTR_ERR(handle);
1655 data.handle.handle = handle->id;
1660 ret = ion_sync_for_device(client, data.fd.fd);
1663 case ION_IOC_CUSTOM:
1665 if (!dev->custom_ioctl)
1667 ret = dev->custom_ioctl(client, data.custom.cmd,
1675 if (dir & _IOC_READ) {
1676 if (copy_to_user((void __user *)arg, &data, _IOC_SIZE(cmd))) {
1678 ion_free(client, cleanup_handle);
1685 static int ion_release(struct inode *inode, struct file *file)
1687 struct ion_client *client = file->private_data;
1689 pr_debug("%s: %d\n", __func__, __LINE__);
1690 ion_client_destroy(client);
1694 static int ion_open(struct inode *inode, struct file *file)
1696 struct miscdevice *miscdev = file->private_data;
1697 struct ion_device *dev = container_of(miscdev, struct ion_device, dev);
1698 struct ion_client *client;
1699 char debug_name[64];
1701 pr_debug("%s: %d\n", __func__, __LINE__);
1702 snprintf(debug_name, 64, "%u", task_pid_nr(current->group_leader));
1703 client = ion_client_create(dev, debug_name);
1705 return PTR_ERR(client);
1706 file->private_data = client;
1711 static const struct file_operations ion_fops = {
1712 .owner = THIS_MODULE,
1714 .release = ion_release,
1715 .unlocked_ioctl = ion_ioctl,
1716 .compat_ioctl = compat_ion_ioctl,
1719 static size_t ion_debug_heap_total(struct ion_client *client,
1725 mutex_lock(&client->lock);
1726 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
1727 struct ion_handle *handle = rb_entry(n,
1730 if (handle->buffer->heap->id == id)
1731 size += handle->buffer->size;
1733 mutex_unlock(&client->lock);
1737 static int ion_debug_heap_show(struct seq_file *s, void *unused)
1739 struct ion_heap *heap = s->private;
1740 struct ion_device *dev = heap->dev;
1742 size_t total_size = 0;
1743 size_t total_orphaned_size = 0;
1745 seq_printf(s, "%16.s %16.s %16.s\n", "client", "pid", "size");
1746 seq_printf(s, "----------------------------------------------------\n");
1748 for (n = rb_first(&dev->clients); n; n = rb_next(n)) {
1749 struct ion_client *client = rb_entry(n, struct ion_client,
1751 size_t size = ion_debug_heap_total(client, heap->id);
1756 char task_comm[TASK_COMM_LEN];
1758 get_task_comm(task_comm, client->task);
1759 seq_printf(s, "%16.s %16u %16zu\n", task_comm,
1762 seq_printf(s, "%16.s %16u %16zu\n", client->name,
1766 seq_printf(s, "----------------------------------------------------\n");
1767 seq_printf(s, "orphaned allocations (info is from last known client):"
1769 mutex_lock(&dev->buffer_lock);
1770 for (n = rb_first(&dev->buffers); n; n = rb_next(n)) {
1771 struct ion_buffer *buffer = rb_entry(n, struct ion_buffer,
1773 if (buffer->heap->id != heap->id)
1775 total_size += buffer->size;
1776 if (!buffer->handle_count) {
1777 seq_printf(s, "%16.s %16u %16zu 0x%p %d %d\n",
1778 buffer->task_comm, buffer->pid,
1779 buffer->size, buffer,
1781 atomic_read(&buffer->ref.refcount));
1782 total_orphaned_size += buffer->size;
1785 mutex_unlock(&dev->buffer_lock);
1786 seq_printf(s, "----------------------------------------------------\n");
1787 seq_printf(s, "%16.s %16zu\n", "total orphaned",
1788 total_orphaned_size);
1789 seq_printf(s, "%16.s %16zu\n", "total ", total_size);
1790 if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
1791 seq_printf(s, "%16.s %16zu\n", "deferred free",
1792 heap->free_list_size);
1793 seq_printf(s, "----------------------------------------------------\n");
1795 if (heap->debug_show)
1796 heap->debug_show(heap, s, unused);
1801 static int ion_debug_heap_open(struct inode *inode, struct file *file)
1803 return single_open(file, ion_debug_heap_show, inode->i_private);
1806 static const struct file_operations debug_heap_fops = {
1807 .open = ion_debug_heap_open,
1809 .llseek = seq_lseek,
1810 .release = single_release,
1813 #ifdef DEBUG_HEAP_SHRINKER
1814 static int debug_shrink_set(void *data, u64 val)
1816 struct ion_heap *heap = data;
1817 struct shrink_control sc;
1826 objs = heap->shrinker.shrink(&heap->shrinker, &sc);
1827 sc.nr_to_scan = objs;
1829 heap->shrinker.shrink(&heap->shrinker, &sc);
1833 static int debug_shrink_get(void *data, u64 *val)
1835 struct ion_heap *heap = data;
1836 struct shrink_control sc;
1842 objs = heap->shrinker.shrink(&heap->shrinker, &sc);
1847 DEFINE_SIMPLE_ATTRIBUTE(debug_shrink_fops, debug_shrink_get,
1848 debug_shrink_set, "%llu\n");
1852 // struct "cma" quoted from drivers/base/dma-contiguous.c
1854 unsigned long base_pfn;
1855 unsigned long count;
1856 unsigned long *bitmap;
1859 // struct "ion_cma_heap" quoted from drivers/staging/android/ion/ion_cma_heap.c
1860 struct ion_cma_heap {
1861 struct ion_heap heap;
1865 static int ion_cma_heap_debug_show(struct seq_file *s, void *unused)
1867 struct ion_heap *heap = s->private;
1868 struct ion_cma_heap *cma_heap = container_of(heap,
1869 struct ion_cma_heap,
1871 struct device *dev = cma_heap->dev;
1872 struct cma *cma = dev_get_cma_area(dev);
1874 int rows = cma->count/(SZ_1M >> PAGE_SHIFT);
1875 phys_addr_t base = __pfn_to_phys(cma->base_pfn);
1877 seq_printf(s, "%s Heap bitmap:\n", heap->name);
1879 for(i = rows - 1; i>= 0; i--){
1880 seq_printf(s, "%.4uM@0x%lx: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
1881 i+1, (unsigned long)base+(i)*SZ_1M,
1882 cma->bitmap[i*8 + 7],
1883 cma->bitmap[i*8 + 6],
1884 cma->bitmap[i*8 + 5],
1885 cma->bitmap[i*8 + 4],
1886 cma->bitmap[i*8 + 3],
1887 cma->bitmap[i*8 + 2],
1888 cma->bitmap[i*8 + 1],
1891 seq_printf(s, "Heap size: %luM, Heap base: 0x%lx\n",
1892 (cma->count)>>8, (unsigned long)base);
1897 static int ion_debug_heap_bitmap_open(struct inode *inode, struct file *file)
1899 return single_open(file, ion_cma_heap_debug_show, inode->i_private);
1902 static const struct file_operations debug_heap_bitmap_fops = {
1903 .open = ion_debug_heap_bitmap_open,
1905 .llseek = seq_lseek,
1906 .release = single_release,
1911 rockchip_ion_debug_write(struct file *filp, const char __user *ubuf, size_t cnt,
1916 if (copy_from_user(buf, ubuf, cnt>63?63:cnt)) {
1920 ion_trace_lvl = simple_strtol(buf, NULL, 10);
1926 rockchip_ion_debug_read(struct file *filp, char __user *ubuf, size_t cnt,
1935 snprintf(buf, 63, "%d\n", ion_trace_lvl);
1936 r = simple_read_from_buffer(ubuf, cnt, ppos, buf, strlen(buf));
1941 static const struct file_operations rockchip_ion_debug_fops = {
1942 .read = rockchip_ion_debug_read,
1943 .write = rockchip_ion_debug_write,
1946 void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap)
1948 struct dentry *debug_file;
1950 if (!heap->ops->allocate || !heap->ops->free || !heap->ops->map_dma ||
1951 !heap->ops->unmap_dma)
1952 pr_err("%s: can not add heap with invalid ops struct.\n",
1955 if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
1956 ion_heap_init_deferred_free(heap);
1958 if ((heap->flags & ION_HEAP_FLAG_DEFER_FREE) || heap->ops->shrink)
1959 ion_heap_init_shrinker(heap);
1962 down_write(&dev->lock);
1963 /* use negative heap->id to reverse the priority -- when traversing
1964 the list later attempt higher id numbers first */
1965 plist_node_init(&heap->node, -heap->id);
1966 plist_add(&heap->node, &dev->heaps);
1967 debug_file = debugfs_create_file(heap->name, 0664,
1968 dev->heaps_debug_root, heap,
1972 char buf[256], *path;
1974 path = dentry_path(dev->heaps_debug_root, buf, 256);
1975 pr_err("Failed to create heap debugfs at %s/%s\n",
1979 #ifdef DEBUG_HEAP_SHRINKER
1980 if (heap->shrinker.shrink) {
1981 char debug_name[64];
1983 snprintf(debug_name, 64, "%s_shrink", heap->name);
1984 debug_file = debugfs_create_file(
1985 debug_name, 0644, dev->heaps_debug_root, heap,
1986 &debug_shrink_fops);
1988 char buf[256], *path;
1990 path = dentry_path(dev->heaps_debug_root, buf, 256);
1991 pr_err("Failed to create heap shrinker debugfs at %s/%s\n",
1997 if (ION_HEAP_TYPE_DMA==heap->type) {
1998 char* heap_bitmap_name = kasprintf(
1999 GFP_KERNEL, "%s-bitmap", heap->name);
2000 debug_file = debugfs_create_file(heap_bitmap_name, 0664,
2001 dev->heaps_debug_root, heap,
2002 &debug_heap_bitmap_fops);
2004 char buf[256], *path;
2005 path = dentry_path(dev->heaps_debug_root, buf, 256);
2006 pr_err("Failed to create heap debugfs at %s/%s\n",
2007 path, heap_bitmap_name);
2009 kfree(heap_bitmap_name);
2012 up_write(&dev->lock);
2015 struct ion_device *ion_device_create(long (*custom_ioctl)
2016 (struct ion_client *client,
2020 struct ion_device *idev;
2022 struct dentry* ion_debug;
2024 idev = kzalloc(sizeof(struct ion_device), GFP_KERNEL);
2026 return ERR_PTR(-ENOMEM);
2028 idev->dev.minor = MISC_DYNAMIC_MINOR;
2029 idev->dev.name = "ion";
2030 idev->dev.fops = &ion_fops;
2031 idev->dev.parent = NULL;
2032 ret = misc_register(&idev->dev);
2034 pr_err("ion: failed to register misc device.\n");
2035 return ERR_PTR(ret);
2038 idev->debug_root = debugfs_create_dir("ion", NULL);
2039 if (!idev->debug_root) {
2040 pr_err("ion: failed to create debugfs root directory.\n");
2043 idev->heaps_debug_root = debugfs_create_dir("heaps", idev->debug_root);
2044 if (!idev->heaps_debug_root) {
2045 pr_err("ion: failed to create debugfs heaps directory.\n");
2048 idev->clients_debug_root = debugfs_create_dir("clients",
2050 if (!idev->clients_debug_root)
2051 pr_err("ion: failed to create debugfs clients directory.\n");
2053 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
2054 rockchip_ion_snapshot_debugfs(idev->debug_root);
2057 ion_debug = debugfs_create_file("debug", 0664, idev->debug_root,
2058 NULL, &rockchip_ion_debug_fops);
2060 char buf[256], *path;
2061 path = dentry_path(idev->debug_root, buf, 256);
2062 pr_err("Failed to create debugfs at %s/%s\n",path, "ion_debug");
2067 idev->custom_ioctl = custom_ioctl;
2068 idev->buffers = RB_ROOT;
2069 mutex_init(&idev->buffer_lock);
2070 init_rwsem(&idev->lock);
2071 plist_head_init(&idev->heaps);
2072 idev->clients = RB_ROOT;
2076 void ion_device_destroy(struct ion_device *dev)
2078 misc_deregister(&dev->dev);
2079 debugfs_remove_recursive(dev->debug_root);
2080 /* XXX need to free the heaps and clients ? */
2084 void __init ion_reserve(struct ion_platform_data *data)
2088 for (i = 0; i < data->nr; i++) {
2089 if (data->heaps[i].size == 0)
2092 if (data->heaps[i].id==ION_CMA_HEAP_ID) {
2093 struct device *dev = (struct device*)data->heaps[i].priv;
2094 int ret = dma_declare_contiguous(dev,
2095 data->heaps[i].size,
2096 data->heaps[i].base,
2097 MEMBLOCK_ALLOC_ANYWHERE);
2099 pr_err("%s: dma_declare_contiguous failed %d\n",
2103 data->heaps[i].base = PFN_PHYS(dev_get_cma_area(dev)->base_pfn);
2104 } else if (data->heaps[i].base == 0) {
2107 paddr = memblock_alloc_base(data->heaps[i].size,
2108 data->heaps[i].align,
2109 MEMBLOCK_ALLOC_ANYWHERE);
2111 pr_err("%s: error allocating memblock for "
2116 data->heaps[i].base = paddr;
2118 int ret = memblock_reserve(data->heaps[i].base,
2119 data->heaps[i].size);
2121 pr_err("memblock reserve of %zx@%lx failed\n",
2122 data->heaps[i].size,
2123 data->heaps[i].base);
2127 pr_info("%s: %s reserved base %lx size %zu\n", __func__,
2128 data->heaps[i].name,
2129 data->heaps[i].base,
2130 data->heaps[i].size);
2134 #ifdef CONFIG_ION_ROCKCHIP_SNAPSHOT
2136 // Find the maximum can be allocated memory
2137 static unsigned long ion_find_max_zero_area(unsigned long *map, unsigned long size)
2139 unsigned long index, i, zero_sz, max_zero_sz, start;
2144 index = find_next_zero_bit(map, size, start);
2145 if (index>=size) break;
2147 i = find_next_bit(map, size, index);
2149 pr_debug("zero[%lx, %lx]\n", index, zero_sz);
2150 max_zero_sz = max(max_zero_sz, zero_sz);
2152 } while(start<=size);
2154 pr_debug("max_zero_sz=%lx\n", max_zero_sz);
2158 static int ion_snapshot_save(struct ion_device *idev, size_t len)
2160 static struct seq_file seqf;
2161 struct ion_heap *heap;
2164 seqf.buf = rockchip_ion_snapshot_get(&seqf.size);
2168 memset(seqf.buf, 0, seqf.size);
2170 pr_debug("%s: save snapshot 0x%zx@0x%lx\n", __func__, seqf.size,
2171 (unsigned long)__pa(seqf.buf));
2173 seq_printf(&seqf, "call by comm: %s pid: %d, alloc: %zuKB\n",
2174 current->comm, current->pid, len>>10);
2176 down_read(&idev->lock);
2178 plist_for_each_entry(heap, &idev->heaps, node) {
2179 seqf.private = (void*)heap;
2180 seq_printf(&seqf, "++++++++++++++++ HEAP: %s ++++++++++++++++\n",
2182 ion_debug_heap_show(&seqf, NULL);
2183 if (ION_HEAP_TYPE_DMA==heap->type) {
2184 struct ion_cma_heap *cma_heap = container_of(heap,
2185 struct ion_cma_heap,
2187 struct cma *cma = dev_get_cma_area(cma_heap->dev);
2188 seq_printf(&seqf, "\n");
2189 seq_printf(&seqf, "Maximum allocation of pages: %ld\n",
2190 ion_find_max_zero_area(cma->bitmap, cma->count));
2191 seq_printf(&seqf, "\n");
2195 up_read(&idev->lock);