Lines Matching defs:buffer
50 static struct binder_buffer *binder_buffer_next(struct binder_buffer *buffer)
52 return list_entry(buffer->entry.next, struct binder_buffer, entry);
55 static struct binder_buffer *binder_buffer_prev(struct binder_buffer *buffer)
57 return list_entry(buffer->entry.prev, struct binder_buffer, entry);
61 struct binder_buffer *buffer)
63 if (list_is_last(&buffer->entry, &alloc->buffers))
64 return alloc->buffer + alloc->buffer_size - buffer->user_data;
65 return binder_buffer_next(buffer)->user_data - buffer->user_data;
73 struct binder_buffer *buffer;
82 "%d: add free buffer, size %zd, at %pK\n",
87 buffer = rb_entry(parent, struct binder_buffer, rb_node);
88 BUG_ON(!buffer->free);
90 buffer_size = binder_alloc_buffer_size(alloc, buffer);
106 struct binder_buffer *buffer;
112 buffer = rb_entry(parent, struct binder_buffer, rb_node);
113 BUG_ON(buffer->free);
115 if (new_buffer->user_data < buffer->user_data)
117 else if (new_buffer->user_data > buffer->user_data)
131 struct binder_buffer *buffer;
137 buffer = rb_entry(n, struct binder_buffer, rb_node);
138 BUG_ON(buffer->free);
140 if (uptr < buffer->user_data)
142 else if (uptr > buffer->user_data)
147 * free the buffer when in use by kernel or
150 if (!buffer->allow_user_free)
152 buffer->allow_user_free = 0;
153 return buffer;
160 * binder_alloc_prepare_to_free() - get buffer given user ptr
162 * @user_ptr: User pointer to buffer data
164 * Validate userspace pointer to buffer data and return buffer corresponding to
165 * that user pointer. Search the rb tree for buffer that matches user data
168 * Return: Pointer to buffer or NULL
173 struct binder_buffer *buffer;
176 buffer = binder_alloc_prepare_to_free_locked(alloc, user_ptr);
178 return buffer;
204 page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
231 index = (page_addr - alloc->buffer) / PAGE_SIZE;
283 index = (page_addr - alloc->buffer) / PAGE_SIZE;
336 struct binder_buffer *buffer;
342 buffer = rb_entry(n, struct binder_buffer, rb_node);
343 if (buffer->pid != pid)
345 if (!buffer->async_transaction)
347 total_alloc_size += binder_alloc_buffer_size(alloc, buffer);
353 * async space (which is 25% of total buffer size). Oneway spam is only
377 struct binder_buffer *buffer;
421 buffer = rb_entry(n, struct binder_buffer, rb_node);
422 BUG_ON(!buffer->free);
423 buffer_size = binder_alloc_buffer_size(alloc, buffer);
445 buffer = rb_entry(n, struct binder_buffer, rb_node);
446 buffer_size = binder_alloc_buffer_size(alloc, buffer);
454 buffer = rb_entry(n, struct binder_buffer, rb_node);
455 buffer_size = binder_alloc_buffer_size(alloc, buffer);
472 buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
473 buffer_size = binder_alloc_buffer_size(alloc, buffer);
477 "%d: binder_alloc_buf size %zd got buffer %pK size %zd\n",
478 alloc->pid, size, buffer, buffer_size);
481 (((uintptr_t)buffer->user_data + buffer_size) & PAGE_MASK);
484 (void __user *)PAGE_ALIGN((uintptr_t)buffer->user_data + size);
488 PAGE_ALIGN((uintptr_t)buffer->user_data), end_page_addr);
495 new_buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
497 pr_err("%s: %d failed to alloc new buffer struct\n",
501 new_buffer->user_data = (u8 __user *)buffer->user_data + size;
502 list_add(&new_buffer->entry, &buffer->entry);
508 buffer->free = 0;
509 buffer->allow_user_free = 0;
510 binder_insert_allocated_buffer_locked(alloc, buffer);
513 alloc->pid, size, buffer);
514 buffer->data_size = data_size;
515 buffer->offsets_size = offsets_size;
516 buffer->async_transaction = is_async;
517 buffer->extra_buffers_size = extra_buffers_size;
518 buffer->pid = pid;
519 buffer->oneway_spam_suspect = false;
529 * buffer size).
531 buffer->oneway_spam_suspect = debug_low_async_space_locked(alloc, pid);
536 return buffer;
540 PAGE_ALIGN((uintptr_t)buffer->user_data),
546 * binder_alloc_new_buf() - Allocate a new binder buffer
548 * @data_size: size of user data buffer
549 * @offsets_size: user specified buffer offset
551 * @is_async: buffer for async transaction
554 * Allocate a new buffer given the requested sizes. Returns
555 * the kernel version of the buffer pointer. The size allocated
559 * Return: The allocated buffer or %ERR_PTR(-errno) if error
568 struct binder_buffer *buffer;
571 buffer = binder_alloc_new_buf_locked(alloc, data_size, offsets_size,
574 return buffer;
577 static void __user *buffer_start_page(struct binder_buffer *buffer)
579 return (void __user *)((uintptr_t)buffer->user_data & PAGE_MASK);
582 static void __user *prev_buffer_end_page(struct binder_buffer *buffer)
585 (((uintptr_t)(buffer->user_data) - 1) & PAGE_MASK);
589 struct binder_buffer *buffer)
594 BUG_ON(alloc->buffers.next == &buffer->entry);
595 prev = binder_buffer_prev(buffer);
597 if (prev_buffer_end_page(prev) == buffer_start_page(buffer)) {
600 "%d: merge free, buffer %pK share page with %pK\n",
601 alloc->pid, buffer->user_data,
605 if (!list_is_last(&buffer->entry, &alloc->buffers)) {
606 next = binder_buffer_next(buffer);
607 if (buffer_start_page(next) == buffer_start_page(buffer)) {
610 "%d: merge free, buffer %pK share page with %pK\n",
612 buffer->user_data,
617 if (PAGE_ALIGNED(buffer->user_data)) {
619 "%d: merge free, buffer start %pK is page aligned\n",
620 alloc->pid, buffer->user_data);
626 "%d: merge free, buffer %pK do not share page with %pK or %pK\n",
627 alloc->pid, buffer->user_data,
630 binder_update_page_range(alloc, 0, buffer_start_page(buffer),
631 buffer_start_page(buffer) + PAGE_SIZE);
633 list_del(&buffer->entry);
634 kfree(buffer);
638 struct binder_buffer *buffer)
642 buffer_size = binder_alloc_buffer_size(alloc, buffer);
644 size = ALIGN(buffer->data_size, sizeof(void *)) +
645 ALIGN(buffer->offsets_size, sizeof(void *)) +
646 ALIGN(buffer->extra_buffers_size, sizeof(void *));
650 alloc->pid, buffer, size, buffer_size);
652 BUG_ON(buffer->free);
654 BUG_ON(buffer->transaction != NULL);
655 BUG_ON(buffer->user_data < alloc->buffer);
656 BUG_ON(buffer->user_data > alloc->buffer + alloc->buffer_size);
658 if (buffer->async_transaction) {
666 (void __user *)PAGE_ALIGN((uintptr_t)buffer->user_data),
668 buffer->user_data + buffer_size) & PAGE_MASK));
670 rb_erase(&buffer->rb_node, &alloc->allocated_buffers);
671 buffer->free = 1;
672 if (!list_is_last(&buffer->entry, &alloc->buffers)) {
673 struct binder_buffer *next = binder_buffer_next(buffer);
680 if (alloc->buffers.next != &buffer->entry) {
681 struct binder_buffer *prev = binder_buffer_prev(buffer);
684 binder_delete_free_buffer(alloc, buffer);
686 buffer = prev;
689 binder_insert_free_buffer(alloc, buffer);
693 struct binder_buffer *buffer);
695 * binder_alloc_free_buf() - free a binder buffer
697 * @buffer: kernel pointer to buffer
699 * Free the buffer allocated via binder_alloc_new_buf()
702 struct binder_buffer *buffer)
712 if (buffer->clear_on_free) {
713 binder_alloc_clear_buf(alloc, buffer);
714 buffer->clear_on_free = false;
717 binder_free_buf_locked(alloc, buffer);
739 struct binder_buffer *buffer;
757 alloc->buffer = (void __user *)vma->vm_start;
768 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
769 if (!buffer) {
771 failure_string = "alloc buffer struct";
775 buffer->user_data = alloc->buffer;
776 list_add(&buffer->entry, &alloc->buffers);
777 buffer->free = 1;
778 binder_insert_free_buffer(alloc, buffer);
790 alloc->buffer = NULL;
808 struct binder_buffer *buffer;
815 buffer = rb_entry(n, struct binder_buffer, rb_node);
818 BUG_ON(buffer->transaction);
820 if (buffer->clear_on_free) {
821 binder_alloc_clear_buf(alloc, buffer);
822 buffer->clear_on_free = false;
824 binder_free_buf_locked(alloc, buffer);
829 buffer = list_first_entry(&alloc->buffers,
831 WARN_ON(!buffer->free);
833 list_del(&buffer->entry);
835 kfree(buffer);
851 page_addr = alloc->buffer + i * PAGE_SIZE;
871 struct binder_buffer *buffer)
874 prefix, buffer->debug_id, buffer->user_data,
875 buffer->data_size, buffer->offsets_size,
876 buffer->extra_buffers_size,
877 buffer->transaction ? "active" : "delivered");
881 * binder_alloc_print_allocated() - print buffer info
885 * Prints information about every buffer associated with
895 print_binder_buffer(m, " buffer",
999 page_addr = (uintptr_t)alloc->buffer + index * PAGE_SIZE;
1099 * check_buffer() - verify that buffer/offset is safe to access
1101 * @buffer: binder buffer to be accessed
1102 * @offset: offset into @buffer data
1106 * @buffer and that the buffer is currently active and not freeable.
1108 * allowed to touch the buffer in two cases:
1110 * 1) when the buffer is being created:
1111 * (buffer->free == 0 && buffer->allow_user_free == 0)
1112 * 2) when the buffer is being torn down:
1113 * (buffer->free == 0 && buffer->transaction == NULL).
1115 * Return: true if the buffer is safe to access
1118 struct binder_buffer *buffer,
1121 size_t buffer_size = binder_alloc_buffer_size(alloc, buffer);
1126 !buffer->free &&
1127 (!buffer->allow_user_free || !buffer->transaction);
1131 * binder_alloc_get_page() - get kernel pointer for given buffer offset
1133 * @buffer: binder buffer to be accessed
1134 * @buffer_offset: offset into @buffer data
1138 * at @buffer_offset into @buffer->user_data. If @pgoffp is not
1142 * to a valid address within the @buffer and that @buffer is
1150 struct binder_buffer *buffer,
1155 (buffer->user_data - alloc->buffer);
1166 * binder_alloc_clear_buf() - zero out buffer
1168 * @buffer: binder buffer to be cleared
1170 * memset the given buffer to 0
1173 struct binder_buffer *buffer)
1175 size_t bytes = binder_alloc_buffer_size(alloc, buffer);
1183 page = binder_alloc_get_page(alloc, buffer,
1195 * @buffer: binder buffer to be accessed
1196 * @buffer_offset: offset into @buffer data
1197 * @from: userspace pointer to source buffer
1200 * Copy bytes from source userspace to target buffer.
1206 struct binder_buffer *buffer,
1211 if (!check_buffer(alloc, buffer, buffer_offset, bytes))
1221 page = binder_alloc_get_page(alloc, buffer,
1238 struct binder_buffer *buffer,
1244 if (!check_buffer(alloc, buffer, buffer_offset, bytes))
1252 page = binder_alloc_get_page(alloc, buffer,
1268 struct binder_buffer *buffer,
1273 return binder_alloc_do_buffer_copy(alloc, true, buffer, buffer_offset,
1279 struct binder_buffer *buffer,
1283 return binder_alloc_do_buffer_copy(alloc, false, buffer, buffer_offset,