55 static void yaffs_summary_clear(struct yaffs_dev *dev)  in yaffs_summary_clear()  argument
57 	if (!dev->sum_tags)  in yaffs_summary_clear()
59 	memset(dev->sum_tags, 0, dev->chunks_per_summary *  in yaffs_summary_clear()
64 void yaffs_summary_deinit(struct yaffs_dev *dev)  in yaffs_summary_deinit()  argument
66 	kfree(dev->sum_tags);  in yaffs_summary_deinit()
67 	dev->sum_tags = NULL;  in yaffs_summary_deinit()
68 	kfree(dev->gc_sum_tags);  in yaffs_summary_deinit()
69 	dev->gc_sum_tags = NULL;  in yaffs_summary_deinit()
70 	dev->chunks_per_summary = 0;  in yaffs_summary_deinit()
73 int yaffs_summary_init(struct yaffs_dev *dev)  in yaffs_summary_init()  argument
79 	sum_bytes = dev->param.chunks_per_block *  in yaffs_summary_init()
82 	chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/  in yaffs_summary_init()
83 			(dev->data_bytes_per_chunk -  in yaffs_summary_init()
86 	dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used;  in yaffs_summary_init()
88 				dev->chunks_per_summary;  in yaffs_summary_init()
89 	dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);  in yaffs_summary_init()
90 	dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);  in yaffs_summary_init()
91 	if (!dev->sum_tags || !dev->gc_sum_tags) {  in yaffs_summary_init()
92 		yaffs_summary_deinit(dev);  in yaffs_summary_init()
96 	yaffs_summary_clear(dev);  in yaffs_summary_init()
101 static unsigned yaffs_summary_sum(struct yaffs_dev *dev)  in yaffs_summary_sum()  argument
103 	u8 *sum_buffer = (u8 *)dev->sum_tags;  in yaffs_summary_sum()
108 				dev->chunks_per_summary;  in yaffs_summary_sum()
118 static int yaffs_summary_write(struct yaffs_dev *dev, int blk)  in yaffs_summary_write()  argument
122 	u8 *sum_buffer = (u8 *)dev->sum_tags;  in yaffs_summary_write()
129 	int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);  in yaffs_summary_write()
130 	struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);  in yaffs_summary_write()
132 	buffer = yaffs_get_temp_buffer(dev);  in yaffs_summary_write()
134 				dev->chunks_per_summary;  in yaffs_summary_write()
138 	chunk_in_block = dev->chunks_per_summary;  in yaffs_summary_write()
139 	chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block +  in yaffs_summary_write()
140 						dev->chunks_per_summary;  in yaffs_summary_write()
144 	hdr.sum = yaffs_summary_sum(dev);  in yaffs_summary_write()
153 		result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand,  in yaffs_summary_write()
158 		yaffs_set_chunk_bit(dev, blk, chunk_in_block);  in yaffs_summary_write()
160 		dev->n_free_chunks--;  in yaffs_summary_write()
168 	yaffs_release_temp_buffer(dev, buffer);  in yaffs_summary_write()
178 int yaffs_summary_read(struct yaffs_dev *dev,  in yaffs_summary_read()  argument
192 	struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);  in yaffs_summary_read()
193 	int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);  in yaffs_summary_read()
195 	buffer = yaffs_get_temp_buffer(dev);  in yaffs_summary_read()
196 	n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;  in yaffs_summary_read()
197 	chunk_in_block = dev->chunks_per_summary;  in yaffs_summary_read()
198 	chunk_in_nand = blk * dev->param.chunks_per_block +  in yaffs_summary_read()
199 							dev->chunks_per_summary;  in yaffs_summary_read()
205 		result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand,  in yaffs_summary_read()
217 		if (st == dev->sum_tags) {  in yaffs_summary_read()
219 			yaffs_set_chunk_bit(dev, blk, chunk_in_block);  in yaffs_summary_read()
230 	yaffs_release_temp_buffer(dev, buffer);  in yaffs_summary_read()
236 		    hdr.sum != yaffs_summary_sum(dev))  in yaffs_summary_read()
240 	if (st == dev->sum_tags && result == YAFFS_OK)  in yaffs_summary_read()
246 int yaffs_summary_add(struct yaffs_dev *dev,  in yaffs_summary_add()  argument
252 	int block_in_nand = chunk_in_nand / dev->param.chunks_per_block;  in yaffs_summary_add()
253 	int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block;  in yaffs_summary_add()
255 	if (!dev->sum_tags)  in yaffs_summary_add()
258 	if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {  in yaffs_summary_add()
260 		sum_tags = &dev->sum_tags[chunk_in_block];  in yaffs_summary_add()
265 		if (chunk_in_block == dev->chunks_per_summary - 1) {  in yaffs_summary_add()
267 			yaffs_summary_write(dev, block_in_nand);  in yaffs_summary_add()
268 			yaffs_summary_clear(dev);  in yaffs_summary_add()
269 			yaffs_skip_rest_of_block(dev);  in yaffs_summary_add()
275 int yaffs_summary_fetch(struct yaffs_dev *dev,  in yaffs_summary_fetch()  argument
281 	if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {  in yaffs_summary_fetch()
282 		sum_tags = &dev->sum_tags[chunk_in_block];  in yaffs_summary_fetch()
292 void yaffs_summary_gc(struct yaffs_dev *dev, int blk)  in yaffs_summary_gc()  argument
294 	struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);  in yaffs_summary_gc()
300 	for (i = dev->chunks_per_summary;  in yaffs_summary_gc()
301 	     i < dev->param.chunks_per_block;  in yaffs_summary_gc()
303 		if (yaffs_check_chunk_bit(dev, blk, i)) {  in yaffs_summary_gc()
304 			yaffs_clear_chunk_bit(dev, blk, i);  in yaffs_summary_gc()
306 			dev->n_free_chunks++;  in yaffs_summary_gc()