net/ethtool/bitset.c

32  * Clear @nbits bits of a bitmap with indices @start <= i < @end
119  * @nbits: bit size of the bitmap
128 static void ethnl_bitmap32_update(u32 *dst, unsigned int nbits,
131 	while (nbits > 0) {
135 		if (nbits < 32)
136 			real_mask &= ethnl_lower_bits(nbits);
143 		if (nbits <= 32)
146 		nbits -= 32;
162  * @nbits:   bit length of the bitset
171 int ethnl_bitset32_size(const u32 *val, const u32 *mask, unsigned int nbits,
183 		unsigned int nwords = DIV_ROUND_UP(nbits, 32);
191 		for (i = 0; i < nbits; i++) {
222  * @nbits:    bit length of the bitset
233 		       const u32 *mask, unsigned int nbits,
245 	if (nla_put_u32(skb, ETHTOOL_A_BITSET_SIZE, nbits))
248 		unsigned int nwords = DIV_ROUND_UP(nbits, 32);
257 		if (nbits % 32)
258 			dst[nwords - 1] &= ethnl_lower_bits(nbits);
266 			if (nbits % 32)
267 				dst[nwords - 1] &= ethnl_lower_bits(nbits);
276 		for (i = 0; i < nbits; i++) {
377 static int ethnl_parse_bit(unsigned int *index, bool *val, unsigned int nbits,
394 		if (idx >= nbits) {
409 		idx = ethnl_name_to_idx(names, nbits,
429 ethnl_update_bitset32_verbose(u32 *bitmap, unsigned int nbits,
452 		ethnl_bitmap32_clear(bitmap, 0, nbits, mod);
463 		ret = ethnl_parse_bit(&idx, &new_val, nbits, bit_attr, no_mask,
480 static int ethnl_compact_sanity_checks(unsigned int nbits,
523 	if (attr_nbits <= nbits)
528 	if (ethnl_bitmap32_not_zero(nla_data(test_attr), nbits, attr_nbits)) {
539  * @nbits:   size of the updated bitmap in bits
548  * @nbits but the message must not request modifying any bits past @nbits.
552 int ethnl_update_bitset32(u32 *bitmap, unsigned int nbits,
569 		return ethnl_update_bitset32_verbose(bitmap, nbits, attr, tb,
571 	ret = ethnl_compact_sanity_checks(nbits, attr, tb, extack);
577 			    nla_get_u32(tb[ETHTOOL_A_BITSET_SIZE]), nbits);
583 	if (no_mask && change_bits < nbits)
584 		ethnl_bitmap32_clear(bitmap, change_bits, nbits, mod);
593  * @nbits:   size of @val and @mask bitmaps
598  * Provide @nbits size long bitmaps for value and mask so that
599  * x = (val & mask) | (x & ~mask) would modify any @nbits sized bitmap x
605 		       unsigned int nbits, const struct nlattr *attr,
626 		ret = ethnl_compact_sanity_checks(nbits, attr, tb, extack);
631 		if (change_bits > nbits)
632 			change_bits = nbits;
635 		if (change_bits < nbits)
636 			bitmap_clear(val, change_bits, nbits - change_bits);
638 			bitmap_fill(mask, nbits);
643 			if (change_bits < nbits)
645 					     nbits - change_bits);
662 	bitmap_zero(val, nbits);
664 		bitmap_fill(mask, nbits);
666 		bitmap_zero(mask, nbits);
672 		ret = ethnl_parse_bit(&idx, &bit_val, nbits, bit_attr, no_mask,
700 		      unsigned int nbits, ethnl_string_array_t names,
709 	if (nbits > ETHNL_SMALL_BITMAP_BITS) {
710 		unsigned int nwords = DIV_ROUND_UP(nbits, 32);
721 	bitmap_to_arr32(val32, val, nbits);
723 		bitmap_to_arr32(mask32, mask, nbits);
726 	ret = ethnl_bitset32_size(val32, mask32, nbits, names, compact);
728 	if (nbits > ETHNL_SMALL_BITMAP_BITS)
736 		     unsigned int nbits, ethnl_string_array_t names,
745 	if (nbits > ETHNL_SMALL_BITMAP_BITS) {
746 		unsigned int nwords = DIV_ROUND_UP(nbits, 32);
757 	bitmap_to_arr32(val32, val, nbits);
759 		bitmap_to_arr32(mask32, mask, nbits);
762 	ret = ethnl_put_bitset32(skb, attrtype, val32, mask32, nbits, names,
765 	if (nbits > ETHNL_SMALL_BITMAP_BITS)
771 int ethnl_update_bitset(unsigned long *bitmap, unsigned int nbits,
780 	if (nbits > ETHNL_SMALL_BITMAP_BITS) {
781 		unsigned int dst_words = DIV_ROUND_UP(nbits, 32);
788 	bitmap_to_arr32(bitmap32, bitmap, nbits);
789 	ret = ethnl_update_bitset32(bitmap32, nbits, attr, names, extack,
792 		bitmap_from_arr32(bitmap, bitmap32, nbits);
796 	if (nbits > ETHNL_SMALL_BITMAP_BITS)
809 		      unsigned int nbits, ethnl_string_array_t names,
812 	return ethnl_bitset32_size((const u32 *)val, (const u32 *)mask, nbits,
818 		     unsigned int nbits, ethnl_string_array_t names,
822 				  (const u32 *)mask, nbits, names, compact);
825 int ethnl_update_bitset(unsigned long *bitmap, unsigned int nbits,
829 	return ethnl_update_bitset32((u32 *)bitmap, nbits, attr, names, extack,