66 static void mark_page_used(struct mtdoops_context *cxt, int page)  in mark_page_used()  argument
68 	set_bit(page, cxt->oops_page_used);  in mark_page_used()
71 static void mark_page_unused(struct mtdoops_context *cxt, int page)  in mark_page_unused()  argument
73 	clear_bit(page, cxt->oops_page_used);  in mark_page_unused()
76 static int page_is_used(struct mtdoops_context *cxt, int page)  in page_is_used()  argument
78 	return test_bit(page, cxt->oops_page_used);  in page_is_used()
81 static int mtdoops_erase_block(struct mtdoops_context *cxt, int offset)  in mtdoops_erase_block()  argument
83 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_erase_block()
104 		mark_page_unused(cxt, page);  in mtdoops_erase_block()
109 static void mtdoops_inc_counter(struct mtdoops_context *cxt)  in mtdoops_inc_counter()  argument
111 	cxt->nextpage++;  in mtdoops_inc_counter()
112 	if (cxt->nextpage >= cxt->oops_pages)  in mtdoops_inc_counter()
113 		cxt->nextpage = 0;  in mtdoops_inc_counter()
114 	cxt->nextcount++;  in mtdoops_inc_counter()
115 	if (cxt->nextcount == 0xffffffff)  in mtdoops_inc_counter()
116 		cxt->nextcount = 0;  in mtdoops_inc_counter()
118 	if (page_is_used(cxt, cxt->nextpage)) {  in mtdoops_inc_counter()
119 		schedule_work(&cxt->work_erase);  in mtdoops_inc_counter()
124 	       cxt->nextpage, cxt->nextcount);  in mtdoops_inc_counter()
130 	struct mtdoops_context *cxt =  in mtdoops_workfunc_erase()  local
132 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_workfunc_erase()
139 	mod = (cxt->nextpage * record_size) % mtd->erasesize;  in mtdoops_workfunc_erase()
141 		cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / record_size);  in mtdoops_workfunc_erase()
142 		if (cxt->nextpage >= cxt->oops_pages)  in mtdoops_workfunc_erase()
143 			cxt->nextpage = 0;  in mtdoops_workfunc_erase()
146 	while ((ret = mtd_block_isbad(mtd, cxt->nextpage * record_size)) > 0) {  in mtdoops_workfunc_erase()
149 		       cxt->nextpage * record_size);  in mtdoops_workfunc_erase()
151 		cxt->nextpage = cxt->nextpage + (mtd->erasesize / record_size);  in mtdoops_workfunc_erase()
152 		if (cxt->nextpage >= cxt->oops_pages)  in mtdoops_workfunc_erase()
153 			cxt->nextpage = 0;  in mtdoops_workfunc_erase()
154 		if (i == cxt->oops_pages / (mtd->erasesize / record_size)) {  in mtdoops_workfunc_erase()
166 		ret = mtdoops_erase_block(cxt, cxt->nextpage * record_size);  in mtdoops_workfunc_erase()
170 		       cxt->nextpage, cxt->nextcount);  in mtdoops_workfunc_erase()
175 		ret = mtd_block_markbad(mtd, cxt->nextpage * record_size);  in mtdoops_workfunc_erase()
184 static void mtdoops_write(struct mtdoops_context *cxt, int panic)  in mtdoops_write()  argument
186 	struct mtd_info *mtd = cxt->mtd;  in mtdoops_write()
191 	if (test_and_set_bit(0, &cxt->oops_buf_busy))  in mtdoops_write()
195 	hdr = (struct mtdoops_hdr *)cxt->oops_buf;  in mtdoops_write()
196 	hdr->seq = cxt->nextcount;  in mtdoops_write()
201 		ret = mtd_panic_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
202 				      record_size, &retlen, cxt->oops_buf);  in mtdoops_write()
208 		ret = mtd_write(mtd, cxt->nextpage * record_size,  in mtdoops_write()
209 				record_size, &retlen, cxt->oops_buf);  in mtdoops_write()
213 		       cxt->nextpage * record_size, retlen, record_size, ret);  in mtdoops_write()
214 	mark_page_used(cxt, cxt->nextpage);  in mtdoops_write()
215 	memset(cxt->oops_buf, 0xff, record_size);  in mtdoops_write()
217 	mtdoops_inc_counter(cxt);  in mtdoops_write()
219 	clear_bit(0, &cxt->oops_buf_busy);  in mtdoops_write()
224 	struct mtdoops_context *cxt =  in mtdoops_workfunc_write()  local
227 	mtdoops_write(cxt, 0);  in mtdoops_workfunc_write()
230 static void find_next_position(struct mtdoops_context *cxt)  in find_next_position()  argument
232 	struct mtd_info *mtd = cxt->mtd;  in find_next_position()
238 	for (page = 0; page < cxt->oops_pages; page++) {  in find_next_position()
242 		mark_page_used(cxt, page);  in find_next_position()
253 			mark_page_unused(cxt, page);  in find_next_position()
274 		cxt->nextpage = cxt->oops_pages - 1;  in find_next_position()
275 		cxt->nextcount = 0;  in find_next_position()
278 		cxt->nextpage = maxpos;  in find_next_position()
279 		cxt->nextcount = maxcount;  in find_next_position()
282 	mtdoops_inc_counter(cxt);  in find_next_position()
288 	struct mtdoops_context *cxt = container_of(dumper,  in mtdoops_do_dump()  local
298 	if (test_and_set_bit(0, &cxt->oops_buf_busy))  in mtdoops_do_dump()
301 			     cxt->oops_buf + sizeof(struct mtdoops_hdr),  in mtdoops_do_dump()
303 	clear_bit(0, &cxt->oops_buf_busy);  in mtdoops_do_dump()
307 		mtdoops_write(cxt, 1);  in mtdoops_do_dump()
310 		schedule_work(&cxt->work_write);  in mtdoops_do_dump()
316 	struct mtdoops_context *cxt = &oops_cxt;  in mtdoops_notify_add()  local
321 		cxt->mtd_index = mtd->index;  in mtdoops_notify_add()
323 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_add()
343 	cxt->oops_page_used =  in mtdoops_notify_add()
347 	if (!cxt->oops_page_used) {  in mtdoops_notify_add()
352 	cxt->dump.max_reason = KMSG_DUMP_OOPS;  in mtdoops_notify_add()
353 	cxt->dump.dump = mtdoops_do_dump;  in mtdoops_notify_add()
354 	err = kmsg_dump_register(&cxt->dump);  in mtdoops_notify_add()
357 		vfree(cxt->oops_page_used);  in mtdoops_notify_add()
358 		cxt->oops_page_used = NULL;  in mtdoops_notify_add()
362 	cxt->mtd = mtd;  in mtdoops_notify_add()
363 	cxt->oops_pages = (int)mtd->size / record_size;  in mtdoops_notify_add()
364 	find_next_position(cxt);  in mtdoops_notify_add()
370 	struct mtdoops_context *cxt = &oops_cxt;  in mtdoops_notify_remove()  local
372 	if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)  in mtdoops_notify_remove()
375 	if (kmsg_dump_unregister(&cxt->dump) < 0)  in mtdoops_notify_remove()
378 	cxt->mtd = NULL;  in mtdoops_notify_remove()
379 	flush_work(&cxt->work_erase);  in mtdoops_notify_remove()
380 	flush_work(&cxt->work_write);  in mtdoops_notify_remove()
391 	struct mtdoops_context *cxt = &oops_cxt;  in mtdoops_init()  local
409 	cxt->mtd_index = -1;  in mtdoops_init()
412 		cxt->mtd_index = mtd_index;  in mtdoops_init()
414 	cxt->oops_buf = vmalloc(record_size);  in mtdoops_init()
415 	if (!cxt->oops_buf)  in mtdoops_init()
417 	memset(cxt->oops_buf, 0xff, record_size);  in mtdoops_init()
418 	cxt->oops_buf_busy = 0;  in mtdoops_init()
420 	INIT_WORK(&cxt->work_erase, mtdoops_workfunc_erase);  in mtdoops_init()
421 	INIT_WORK(&cxt->work_write, mtdoops_workfunc_write);  in mtdoops_init()
429 	struct mtdoops_context *cxt = &oops_cxt;  in mtdoops_exit()  local
432 	vfree(cxt->oops_buf);  in mtdoops_exit()
433 	vfree(cxt->oops_page_used);  in mtdoops_exit()