Lines Matching full:buffer
51 static struct binder_buffer *binder_buffer_next(struct binder_buffer *buffer) in binder_buffer_next() argument
53 return list_entry(buffer->entry.next, struct binder_buffer, entry); in binder_buffer_next()
56 static struct binder_buffer *binder_buffer_prev(struct binder_buffer *buffer) in binder_buffer_prev() argument
58 return list_entry(buffer->entry.prev, struct binder_buffer, entry); in binder_buffer_prev()
62 struct binder_buffer *buffer) in binder_alloc_buffer_size() argument
64 if (list_is_last(&buffer->entry, &alloc->buffers)) in binder_alloc_buffer_size()
65 return alloc->vm_start + alloc->buffer_size - buffer->user_data; in binder_alloc_buffer_size()
66 return binder_buffer_next(buffer)->user_data - buffer->user_data; in binder_alloc_buffer_size()
75 struct binder_buffer *buffer; in binder_insert_free_buffer() local
84 "%d: add free buffer, size %zd, at %p\n", in binder_insert_free_buffer()
89 buffer = rb_entry(parent, struct binder_buffer, rb_node); in binder_insert_free_buffer()
90 BUG_ON(!buffer->free); in binder_insert_free_buffer()
92 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_insert_free_buffer()
108 struct binder_buffer *buffer; in binder_insert_allocated_buffer_locked() local
114 buffer = rb_entry(parent, struct binder_buffer, rb_node); in binder_insert_allocated_buffer_locked()
115 BUG_ON(buffer->free); in binder_insert_allocated_buffer_locked()
117 if (new_buffer->user_data < buffer->user_data) in binder_insert_allocated_buffer_locked()
119 else if (new_buffer->user_data > buffer->user_data) in binder_insert_allocated_buffer_locked()
133 struct binder_buffer *buffer; in binder_alloc_prepare_to_free_locked() local
136 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_prepare_to_free_locked()
137 BUG_ON(buffer->free); in binder_alloc_prepare_to_free_locked()
139 if (user_ptr < buffer->user_data) { in binder_alloc_prepare_to_free_locked()
141 } else if (user_ptr > buffer->user_data) { in binder_alloc_prepare_to_free_locked()
146 * free the buffer when in use by kernel or in binder_alloc_prepare_to_free_locked()
149 if (!buffer->allow_user_free) in binder_alloc_prepare_to_free_locked()
151 buffer->allow_user_free = 0; in binder_alloc_prepare_to_free_locked()
152 return buffer; in binder_alloc_prepare_to_free_locked()
159 * binder_alloc_prepare_to_free() - get buffer given user ptr
161 * @user_ptr: User pointer to buffer data
163 * Validate userspace pointer to buffer data and return buffer corresponding to
164 * that user pointer. Search the rb tree for buffer that matches user data
167 * Return: Pointer to buffer or NULL
362 struct binder_buffer *buffer, in binder_install_buffer_pages() argument
368 start = buffer->user_data & PAGE_MASK; in binder_install_buffer_pages()
369 final = PAGE_ALIGN(buffer->user_data + size); in binder_install_buffer_pages()
428 struct binder_buffer *buffer; in debug_no_space_locked() local
438 buffer = rb_entry(n, struct binder_buffer, rb_node); in debug_no_space_locked()
439 buffer_size = binder_alloc_buffer_size(alloc, buffer); in debug_no_space_locked()
447 buffer = rb_entry(n, struct binder_buffer, rb_node); in debug_no_space_locked()
448 buffer_size = binder_alloc_buffer_size(alloc, buffer); in debug_no_space_locked()
471 struct binder_buffer *buffer; in debug_low_async_space_locked() local
479 * space left (which is less than 10% of total buffer size). in debug_low_async_space_locked()
488 buffer = rb_entry(n, struct binder_buffer, rb_node); in debug_low_async_space_locked()
489 if (buffer->pid != pid) in debug_low_async_space_locked()
491 if (!buffer->async_transaction) in debug_low_async_space_locked()
493 total_alloc_size += binder_alloc_buffer_size(alloc, buffer); in debug_low_async_space_locked()
499 * async space (which is 25% of total buffer size). Oneway spam is only in debug_low_async_space_locked()
523 struct binder_buffer *buffer; in binder_alloc_new_buf_locked() local
532 buffer = ERR_PTR(-ENOSPC); in binder_alloc_new_buf_locked()
537 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_new_buf_locked()
538 BUG_ON(!buffer->free); in binder_alloc_new_buf_locked()
539 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_alloc_new_buf_locked()
557 buffer = ERR_PTR(-ENOSPC); in binder_alloc_new_buf_locked()
562 /* Found an oversized buffer and needs to be split */ in binder_alloc_new_buf_locked()
563 buffer = rb_entry(best_fit, struct binder_buffer, rb_node); in binder_alloc_new_buf_locked()
564 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_alloc_new_buf_locked()
567 new_buffer->user_data = buffer->user_data + size; in binder_alloc_new_buf_locked()
568 list_add(&new_buffer->entry, &buffer->entry); in binder_alloc_new_buf_locked()
575 "%d: binder_alloc_buf size %zd got buffer %p size %zd\n", in binder_alloc_new_buf_locked()
576 alloc->pid, size, buffer, buffer_size); in binder_alloc_new_buf_locked()
581 * adjacent in-use buffer. In such case, the page has been already in binder_alloc_new_buf_locked()
584 next_used_page = (buffer->user_data + buffer_size) & PAGE_MASK; in binder_alloc_new_buf_locked()
585 curr_last_page = PAGE_ALIGN(buffer->user_data + size); in binder_alloc_new_buf_locked()
586 binder_lru_freelist_del(alloc, PAGE_ALIGN(buffer->user_data), in binder_alloc_new_buf_locked()
589 rb_erase(&buffer->rb_node, &alloc->free_buffers); in binder_alloc_new_buf_locked()
590 buffer->free = 0; in binder_alloc_new_buf_locked()
591 buffer->allow_user_free = 0; in binder_alloc_new_buf_locked()
592 binder_insert_allocated_buffer_locked(alloc, buffer); in binder_alloc_new_buf_locked()
593 buffer->async_transaction = is_async; in binder_alloc_new_buf_locked()
594 buffer->oneway_spam_suspect = false; in binder_alloc_new_buf_locked()
601 buffer->oneway_spam_suspect = true; in binder_alloc_new_buf_locked()
607 return buffer; in binder_alloc_new_buf_locked()
633 * binder_alloc_new_buf() - Allocate a new binder buffer
635 * @data_size: size of user data buffer
636 * @offsets_size: user specified buffer offset
638 * @is_async: buffer for async transaction
640 * Allocate a new buffer given the requested sizes. Returns
641 * the kernel version of the buffer pointer. The size allocated
645 * Return: The allocated buffer or %ERR_PTR(-errno) if error
653 struct binder_buffer *buffer, *next; in binder_alloc_new_buf() local
674 /* Preallocate the next buffer */ in binder_alloc_new_buf()
680 buffer = binder_alloc_new_buf_locked(alloc, next, size, is_async); in binder_alloc_new_buf()
681 if (IS_ERR(buffer)) { in binder_alloc_new_buf()
686 buffer->data_size = data_size; in binder_alloc_new_buf()
687 buffer->offsets_size = offsets_size; in binder_alloc_new_buf()
688 buffer->extra_buffers_size = extra_buffers_size; in binder_alloc_new_buf()
689 buffer->pid = current->tgid; in binder_alloc_new_buf()
692 ret = binder_install_buffer_pages(alloc, buffer, size); in binder_alloc_new_buf()
694 binder_alloc_free_buf(alloc, buffer); in binder_alloc_new_buf()
695 buffer = ERR_PTR(ret); in binder_alloc_new_buf()
698 return buffer; in binder_alloc_new_buf()
702 static unsigned long buffer_start_page(struct binder_buffer *buffer) in buffer_start_page() argument
704 return buffer->user_data & PAGE_MASK; in buffer_start_page()
707 static unsigned long prev_buffer_end_page(struct binder_buffer *buffer) in prev_buffer_end_page() argument
709 return (buffer->user_data - 1) & PAGE_MASK; in prev_buffer_end_page()
713 struct binder_buffer *buffer) in binder_delete_free_buffer() argument
717 if (PAGE_ALIGNED(buffer->user_data)) in binder_delete_free_buffer()
720 BUG_ON(alloc->buffers.next == &buffer->entry); in binder_delete_free_buffer()
721 prev = binder_buffer_prev(buffer); in binder_delete_free_buffer()
723 if (prev_buffer_end_page(prev) == buffer_start_page(buffer)) in binder_delete_free_buffer()
726 if (!list_is_last(&buffer->entry, &alloc->buffers)) { in binder_delete_free_buffer()
727 next = binder_buffer_next(buffer); in binder_delete_free_buffer()
728 if (buffer_start_page(next) == buffer_start_page(buffer)) in binder_delete_free_buffer()
732 binder_lru_freelist_add(alloc, buffer_start_page(buffer), in binder_delete_free_buffer()
733 buffer_start_page(buffer) + PAGE_SIZE); in binder_delete_free_buffer()
735 list_del(&buffer->entry); in binder_delete_free_buffer()
736 kfree(buffer); in binder_delete_free_buffer()
740 struct binder_buffer *buffer) in binder_free_buf_locked() argument
744 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_free_buf_locked()
746 size = ALIGN(buffer->data_size, sizeof(void *)) + in binder_free_buf_locked()
747 ALIGN(buffer->offsets_size, sizeof(void *)) + in binder_free_buf_locked()
748 ALIGN(buffer->extra_buffers_size, sizeof(void *)); in binder_free_buf_locked()
752 alloc->pid, buffer, size, buffer_size); in binder_free_buf_locked()
754 BUG_ON(buffer->free); in binder_free_buf_locked()
756 BUG_ON(buffer->transaction != NULL); in binder_free_buf_locked()
757 BUG_ON(buffer->user_data < alloc->vm_start); in binder_free_buf_locked()
758 BUG_ON(buffer->user_data > alloc->vm_start + alloc->buffer_size); in binder_free_buf_locked()
760 if (buffer->async_transaction) { in binder_free_buf_locked()
767 binder_lru_freelist_add(alloc, PAGE_ALIGN(buffer->user_data), in binder_free_buf_locked()
768 (buffer->user_data + buffer_size) & PAGE_MASK); in binder_free_buf_locked()
770 rb_erase(&buffer->rb_node, &alloc->allocated_buffers); in binder_free_buf_locked()
771 buffer->free = 1; in binder_free_buf_locked()
772 if (!list_is_last(&buffer->entry, &alloc->buffers)) { in binder_free_buf_locked()
773 struct binder_buffer *next = binder_buffer_next(buffer); in binder_free_buf_locked()
780 if (alloc->buffers.next != &buffer->entry) { in binder_free_buf_locked()
781 struct binder_buffer *prev = binder_buffer_prev(buffer); in binder_free_buf_locked()
784 binder_delete_free_buffer(alloc, buffer); in binder_free_buf_locked()
786 buffer = prev; in binder_free_buf_locked()
789 binder_insert_free_buffer(alloc, buffer); in binder_free_buf_locked()
793 * binder_alloc_get_page() - get kernel pointer for given buffer offset
795 * @buffer: binder buffer to be accessed
796 * @buffer_offset: offset into @buffer data
800 * at @buffer_offset into @buffer->user_data. If @pgoffp is not
804 * to a valid address within the @buffer and that @buffer is
812 struct binder_buffer *buffer, in binder_alloc_get_page() argument
817 (buffer->user_data - alloc->vm_start); in binder_alloc_get_page()
827 * binder_alloc_clear_buf() - zero out buffer
829 * @buffer: binder buffer to be cleared
831 * memset the given buffer to 0
834 struct binder_buffer *buffer) in binder_alloc_clear_buf() argument
836 size_t bytes = binder_alloc_buffer_size(alloc, buffer); in binder_alloc_clear_buf()
844 page = binder_alloc_get_page(alloc, buffer, in binder_alloc_clear_buf()
854 * binder_alloc_free_buf() - free a binder buffer
856 * @buffer: kernel pointer to buffer
858 * Free the buffer allocated via binder_alloc_new_buf()
861 struct binder_buffer *buffer) in binder_alloc_free_buf() argument
871 if (buffer->clear_on_free) { in binder_alloc_free_buf()
872 binder_alloc_clear_buf(alloc, buffer); in binder_alloc_free_buf()
873 buffer->clear_on_free = false; in binder_alloc_free_buf()
876 binder_free_buf_locked(alloc, buffer); in binder_alloc_free_buf()
897 struct binder_buffer *buffer; in binder_alloc_mmap_handler() local
927 buffer = kzalloc_obj(*buffer); in binder_alloc_mmap_handler()
928 if (!buffer) { in binder_alloc_mmap_handler()
930 failure_string = "alloc buffer struct"; in binder_alloc_mmap_handler()
934 buffer->user_data = alloc->vm_start; in binder_alloc_mmap_handler()
935 list_add(&buffer->entry, &alloc->buffers); in binder_alloc_mmap_handler()
936 buffer->free = 1; in binder_alloc_mmap_handler()
937 binder_insert_free_buffer(alloc, buffer); in binder_alloc_mmap_handler()
967 struct binder_buffer *buffer; in binder_alloc_deferred_release() local
974 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_deferred_release()
977 BUG_ON(buffer->transaction); in binder_alloc_deferred_release()
979 if (buffer->clear_on_free) { in binder_alloc_deferred_release()
980 binder_alloc_clear_buf(alloc, buffer); in binder_alloc_deferred_release()
981 buffer->clear_on_free = false; in binder_alloc_deferred_release()
983 binder_free_buf_locked(alloc, buffer); in binder_alloc_deferred_release()
988 buffer = list_first_entry(&alloc->buffers, in binder_alloc_deferred_release()
990 WARN_ON(!buffer->free); in binder_alloc_deferred_release()
992 list_del(&buffer->entry); in binder_alloc_deferred_release()
994 kfree(buffer); in binder_alloc_deferred_release()
1033 * binder_alloc_print_allocated() - print buffer info
1037 * Prints information about every buffer associated with
1043 struct binder_buffer *buffer; in binder_alloc_print_allocated() local
1048 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_print_allocated()
1049 seq_printf(m, " buffer %d: %lx size %zd:%zd:%zd %s\n", in binder_alloc_print_allocated()
1050 buffer->debug_id, in binder_alloc_print_allocated()
1051 buffer->user_data - alloc->vm_start, in binder_alloc_print_allocated()
1052 buffer->data_size, buffer->offsets_size, in binder_alloc_print_allocated()
1053 buffer->extra_buffers_size, in binder_alloc_print_allocated()
1054 buffer->transaction ? "active" : "delivered"); in binder_alloc_print_allocated()
1285 * check_buffer() - verify that buffer/offset is safe to access
1287 * @buffer: binder buffer to be accessed
1288 * @offset: offset into @buffer data
1292 * @buffer and that the buffer is currently active and not freeable.
1294 * allowed to touch the buffer in two cases:
1296 * 1) when the buffer is being created:
1297 * (buffer->free == 0 && buffer->allow_user_free == 0)
1298 * 2) when the buffer is being torn down:
1299 * (buffer->free == 0 && buffer->transaction == NULL).
1301 * Return: true if the buffer is safe to access
1304 struct binder_buffer *buffer, in check_buffer() argument
1307 size_t buffer_size = binder_alloc_buffer_size(alloc, buffer); in check_buffer()
1312 !buffer->free && in check_buffer()
1313 (!buffer->allow_user_free || !buffer->transaction); in check_buffer()
1319 * @buffer: binder buffer to be accessed
1320 * @buffer_offset: offset into @buffer data
1321 * @from: userspace pointer to source buffer
1324 * Copy bytes from source userspace to target buffer.
1330 struct binder_buffer *buffer, in binder_alloc_copy_user_to_buffer() argument
1335 if (!check_buffer(alloc, buffer, buffer_offset, bytes)) in binder_alloc_copy_user_to_buffer()
1345 page = binder_alloc_get_page(alloc, buffer, in binder_alloc_copy_user_to_buffer()
1362 struct binder_buffer *buffer, in binder_alloc_do_buffer_copy() argument
1368 if (!check_buffer(alloc, buffer, buffer_offset, bytes)) in binder_alloc_do_buffer_copy()
1376 page = binder_alloc_get_page(alloc, buffer, in binder_alloc_do_buffer_copy()
1392 struct binder_buffer *buffer, in binder_alloc_copy_to_buffer() argument
1397 return binder_alloc_do_buffer_copy(alloc, true, buffer, buffer_offset, in binder_alloc_copy_to_buffer()
1403 struct binder_buffer *buffer, in binder_alloc_copy_from_buffer() argument
1407 return binder_alloc_do_buffer_copy(alloc, false, buffer, buffer_offset, in binder_alloc_copy_from_buffer()