49 int ore_verify_layout(unsigned total_comps, struct ore_layout *layout)  in ore_verify_layout()  argument
53 	switch (layout->raid_algorithm) {  in ore_verify_layout()
55 		layout->parity = 0;  in ore_verify_layout()
58 		layout->parity = 1;  in ore_verify_layout()
61 		layout->parity = 2;  in ore_verify_layout()
66 			layout->raid_algorithm);  in ore_verify_layout()
69 	if (0 != (layout->stripe_unit & ~PAGE_MASK)) {  in ore_verify_layout()
72 			  _LLU(layout->stripe_unit), PAGE_SIZE);  in ore_verify_layout()
75 	if (layout->group_width) {  in ore_verify_layout()
76 		if (!layout->group_depth) {  in ore_verify_layout()
80 		if (total_comps < (layout->group_width * layout->mirrors_p1)) {  in ore_verify_layout()
83 				total_comps, layout->group_width,  in ore_verify_layout()
84 				layout->mirrors_p1);  in ore_verify_layout()
87 		layout->group_count = total_comps / layout->mirrors_p1 /  in ore_verify_layout()
88 						layout->group_width;  in ore_verify_layout()
90 		if (layout->group_depth) {  in ore_verify_layout()
93 				_LLU(layout->group_depth));  in ore_verify_layout()
95 		layout->group_width = total_comps / layout->mirrors_p1;  in ore_verify_layout()
96 		layout->group_depth = -1;  in ore_verify_layout()
97 		layout->group_count = 1;  in ore_verify_layout()
100 	stripe_length = (u64)layout->group_width * layout->stripe_unit;  in ore_verify_layout()
107 	layout->max_io_length =  in ore_verify_layout()
108 		(BIO_MAX_PAGES_KMALLOC * PAGE_SIZE - layout->stripe_unit) *  in ore_verify_layout()
109 					(layout->group_width - layout->parity);  in ore_verify_layout()
110 	if (layout->parity) {  in ore_verify_layout()
112 				(layout->group_width - layout->parity) *  in ore_verify_layout()
113 				layout->stripe_unit;  in ore_verify_layout()
115 		layout->max_io_length /= stripe_length;  in ore_verify_layout()
116 		layout->max_io_length *= stripe_length;  in ore_verify_layout()
118 	ORE_DBGMSG("max_io_length=0x%lx\n", layout->max_io_length);  in ore_verify_layout()
143 int  _ore_get_io_state(struct ore_layout *layout,  in _ore_get_io_state()  argument
220 	ios->layout = layout;  in _ore_get_io_state()
242 int  ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc,  in ore_get_rw_state()  argument
247 	unsigned numdevs = layout->group_width * layout->mirrors_p1;  in ore_get_rw_state()
251 	if (layout->parity && length) {  in ore_get_rw_state()
252 		unsigned data_devs = layout->group_width - layout->parity;  in ore_get_rw_state()
253 		unsigned stripe_size = layout->stripe_unit * data_devs;  in ore_get_rw_state()
254 		unsigned pages_in_unit = layout->stripe_unit / PAGE_SIZE;  in ore_get_rw_state()
263 		num_raid_units =  num_stripes * layout->parity;  in ore_get_rw_state()
273 			num_raid_units += layout->group_width;  in ore_get_rw_state()
282 	ret = _ore_get_io_state(layout, oc, numdevs, sgs_per_dev, max_par_pages,  in ore_get_rw_state()
292 		ore_calc_stripe_info(layout, offset, length, &ios->si);  in ore_get_rw_state()
296 		if (layout->parity)  in ore_get_rw_state()
311 int  ore_get_io_state(struct ore_layout *layout, struct ore_components *oc,  in ore_get_io_state()  argument
314 	return _ore_get_io_state(layout, oc, oc->numdevs, 0, 0, pios);  in ore_get_io_state()
526 void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset,  in ore_calc_stripe_info()  argument
529 	u32	stripe_unit = layout->stripe_unit;  in ore_calc_stripe_info()
530 	u32	group_width = layout->group_width;  in ore_calc_stripe_info()
531 	u64	group_depth = layout->group_depth;  in ore_calc_stripe_info()
532 	u32	parity      = layout->parity;  in ore_calc_stripe_info()
537 	u64	S = T * layout->group_count;  in ore_calc_stripe_info()
579 	si->dev *= layout->mirrors_p1;  in ore_calc_stripe_info()
580 	si->par_dev *= layout->mirrors_p1;  in ore_calc_stripe_info()
610 			     (ios->layout->group_width - ios->layout->parity) /  in _ore_add_stripe_unit()
611 			     ios->layout->group_width;  in _ore_add_stripe_unit()
613 		bio_size *= (ios->layout->stripe_unit / PAGE_SIZE);  in _ore_add_stripe_unit()
669 	for (do_parity = ios->layout->parity; do_parity; --do_parity) {  in _add_parity_units()
690 						       ios->layout->group_width;  in _add_parity_units()
700 	unsigned stripe_unit = ios->layout->stripe_unit;  in _prepare_for_striping()
701 	unsigned mirrors_p1 = ios->layout->mirrors_p1;  in _prepare_for_striping()
702 	unsigned group_width = ios->layout->group_width;  in _prepare_for_striping()
711 		ios->numdevs = ios->layout->mirrors_p1;  in _prepare_for_striping()
757 				si->cur_comp = group_width - ios->layout->parity;  in _prepare_for_striping()
771 				       ios->layout->parity * mirrors_p1) %  in _prepare_for_striping()
840 	unsigned last_comp = cur_comp + ios->layout->mirrors_p1;  in _write_mirror()
896 			BUG_ON((ios->layout->group_width > 1) &&  in _write_mirror()
898 				ios->layout->stripe_unit));  in _write_mirror()
947 	for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {  in ore_write()
968 	first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1;  in _ore_read_mirror()
1021 	for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {  in ore_read()
1057 	int last_comp = cur_comp + ios->layout->mirrors_p1;  in _truncate_mirrors()
1086 static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset,  in _calc_trunk_info()  argument
1089 	unsigned stripe_unit = layout->stripe_unit;  in _calc_trunk_info()
1091 	ore_calc_stripe_info(layout, file_offset, 0, &ti->si);  in _calc_trunk_info()
1096 	ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width);  in _calc_trunk_info()
1097 	ti->nex_group_dev = ti->first_group_dev + layout->group_width;  in _calc_trunk_info()
1100 int ore_truncate(struct ore_layout *layout, struct ore_components *oc,  in ore_truncate()  argument
1111 	ret = ore_get_io_state(layout, oc, &ios);  in ore_truncate()
1115 	_calc_trunk_info(ios->layout, size, &ti);  in ore_truncate()
1136 				      ios->layout->stripe_unit - ti.si.unit_off;  in ore_truncate()
1148 		ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1,  in ore_truncate()