79 	struct msc_window	*win;  member
160 	struct msc_window *win;  in msc_oldest_window()  local
173 	list_for_each_entry(win, &msc->win_list, entry) {  in msc_oldest_window()
174 		if (win->block[0].addr == win_addr)  in msc_oldest_window()
178 		if (msc_block_is_empty(win->block[0].bdesc))  in msc_oldest_window()
182 			return win;  in msc_oldest_window()
194 static unsigned int msc_win_oldest_block(struct msc_window *win)  in msc_win_oldest_block()  argument
197 	struct msc_block_desc *bdesc = win->block[0].bdesc;  in msc_win_oldest_block()
207 	for (blk = 0; blk < win->nr_blocks; blk++) {  in msc_win_oldest_block()
208 		bdesc = win->block[blk].bdesc;  in msc_win_oldest_block()
222 static inline bool msc_is_last_win(struct msc_window *win)  in msc_is_last_win()  argument
224 	return win->entry.next == &win->msc->win_list;  in msc_is_last_win()
233 static struct msc_window *msc_next_window(struct msc_window *win)  in msc_next_window()  argument
235 	if (msc_is_last_win(win))  in msc_next_window()
236 		return list_entry(win->msc->win_list.next, struct msc_window,  in msc_next_window()
239 	return list_entry(win->entry.next, struct msc_window, entry);  in msc_next_window()
244 	return iter->win->block[iter->block].bdesc;  in msc_iter_bdesc()
286 	iter->start_block = msc_win_oldest_block(iter->win);  in msc_iter_block_start()
309 	iter->win = iter->start_win;  in msc_iter_win_start()
319 	iter->win = msc_next_window(iter->win);  in msc_iter_win_advance()
322 	if (iter->win == iter->start_win) {  in msc_iter_win_advance()
350 	if (++iter->block == iter->win->nr_blocks)  in msc_iter_block_advance()
455 	struct msc_window *win;  in msc_buffer_clear_hw_header()  local
458 	list_for_each_entry(win, &msc->win_list, entry) {  in msc_buffer_clear_hw_header()
463 		for (blk = 0; blk < win->nr_blocks; blk++) {  in msc_buffer_clear_hw_header()
464 			struct msc_block_desc *bdesc = win->block[blk].bdesc;  in msc_buffer_clear_hw_header()
677 	struct msc_window *win;  in msc_buffer_win_alloc()  local
684 	win = kzalloc(offsetof(struct msc_window, block[nr_blocks]),  in msc_buffer_win_alloc()
686 	if (!win)  in msc_buffer_win_alloc()
693 		win->pgoff = prev->pgoff + prev->nr_blocks;  in msc_buffer_win_alloc()
697 		win->block[i].bdesc = dma_alloc_coherent(msc_dev(msc), size,  in msc_buffer_win_alloc()
698 							 &win->block[i].addr,  in msc_buffer_win_alloc()
703 		set_memory_uc((unsigned long)win->block[i].bdesc, 1);  in msc_buffer_win_alloc()
706 		if (!win->block[i].bdesc)  in msc_buffer_win_alloc()
710 	win->msc = msc;  in msc_buffer_win_alloc()
711 	win->nr_blocks = nr_blocks;  in msc_buffer_win_alloc()
714 		msc->base = win->block[0].bdesc;  in msc_buffer_win_alloc()
715 		msc->base_addr = win->block[0].addr;  in msc_buffer_win_alloc()
718 	list_add_tail(&win->entry, &msc->win_list);  in msc_buffer_win_alloc()
727 		set_memory_wb((unsigned long)win->block[i].bdesc, 1);  in msc_buffer_win_alloc()
729 		dma_free_coherent(msc_dev(msc), size, win->block[i].bdesc,  in msc_buffer_win_alloc()
730 				  win->block[i].addr);  in msc_buffer_win_alloc()
732 	kfree(win);  in msc_buffer_win_alloc()
745 static void msc_buffer_win_free(struct msc *msc, struct msc_window *win)  in msc_buffer_win_free()  argument
749 	msc->nr_pages -= win->nr_blocks;  in msc_buffer_win_free()
751 	list_del(&win->entry);  in msc_buffer_win_free()
757 	for (i = 0; i < win->nr_blocks; i++) {  in msc_buffer_win_free()
758 		struct page *page = virt_to_page(win->block[i].bdesc);  in msc_buffer_win_free()
763 		set_memory_wb((unsigned long)win->block[i].bdesc, 1);  in msc_buffer_win_free()
765 		dma_free_coherent(msc_dev(win->msc), PAGE_SIZE,  in msc_buffer_win_free()
766 				  win->block[i].bdesc, win->block[i].addr);  in msc_buffer_win_free()
769 	kfree(win);  in msc_buffer_win_free()
781 	struct msc_window *win, *next_win;  in msc_buffer_relink()  local
784 	list_for_each_entry(win, &msc->win_list, entry) {  in msc_buffer_relink()
792 		if (msc_is_last_win(win)) {  in msc_buffer_relink()
797 			next_win = list_entry(win->entry.next,  in msc_buffer_relink()
801 		for (blk = 0; blk < win->nr_blocks; blk++) {  in msc_buffer_relink()
802 			struct msc_block_desc *bdesc = win->block[blk].bdesc;  in msc_buffer_relink()
812 			if (blk == win->nr_blocks - 1) {  in msc_buffer_relink()
815 					win->block[0].addr >> PAGE_SHIFT;  in msc_buffer_relink()
818 					win->block[blk + 1].addr >> PAGE_SHIFT;  in msc_buffer_relink()
835 	struct msc_window *win, *iter;  in msc_buffer_multi_free()  local
837 	list_for_each_entry_safe(win, iter, &msc->win_list, entry)  in msc_buffer_multi_free()
838 		msc_buffer_win_free(msc, win);  in msc_buffer_multi_free()
980 	struct msc_window *win;  in msc_buffer_get_page()  local
985 	list_for_each_entry(win, &msc->win_list, entry)  in msc_buffer_get_page()
986 		if (pgoff >= win->pgoff && pgoff < win->pgoff + win->nr_blocks)  in msc_buffer_get_page()
992 	pgoff -= win->pgoff;  in msc_buffer_get_page()
993 	return virt_to_page(win->block[pgoff].bdesc);  in msc_buffer_get_page()
1349 	struct msc_window *win;  in nr_pages_show()  local
1357 		list_for_each_entry(win, &msc->win_list, entry) {  in nr_pages_show()
1359 					   "%d%c", win->nr_blocks,  in nr_pages_show()
1360 					   msc_is_last_win(win) ? '\n' : ',');  in nr_pages_show()
1376 	unsigned long val, *win = NULL, *rewin;  in nr_pages_store()  local
1409 		rewin = krealloc(win, sizeof(*win) * nr_wins, GFP_KERNEL);  in nr_pages_store()
1411 			kfree(win);  in nr_pages_store()
1415 		win = rewin;  in nr_pages_store()
1416 		win[nr_wins - 1] = val;  in nr_pages_store()
1426 	ret = msc_buffer_alloc(msc, win, nr_wins);  in nr_pages_store()
1430 	kfree(win);  in nr_pages_store()