Differential D30888 Diff 98893 sys/dev/ice/ice_bitops.h

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sys/dev/ice/ice_bitops.h

Show First 20 Lines • Show All 471 Lines • ▼ Show 20 Lines	ice_cmp_bitmap(ice_bitmap_t bmp1, ice_bitmap_t bmp2, u16 size)
/* We want to only compare bits within the size */		/* We want to only compare bits within the size */
mask = LAST_CHUNK_MASK(size);		mask = LAST_CHUNK_MASK(size);
if ((bmp1[i] & mask) != (bmp2[i] & mask))		if ((bmp1[i] & mask) != (bmp2[i] & mask))
return false;		return false;

return true;		return true;
}		}

		/**
		* ice_bitmap_from_array32 - copies u32 array source into bitmap destination
		* @dst: the destination bitmap
		* @src: the source u32 array
		* @size: size of the bitmap (in bits)
		*
		* This function copies the src bitmap stored in an u32 array into the dst
		* bitmap stored as an ice_bitmap_t.
		*/
		static inline void
		ice_bitmap_from_array32(ice_bitmap_t dst, u32 src, u16 size)
		{
		u32 remaining_bits, i;

		#define BITS_PER_U32 (sizeof(u32) * BITS_PER_BYTE)
		/* clear bitmap so we only have to set when iterating */
		ice_zero_bitmap(dst, size);

		for (i = 0; i < (u32)(size / BITS_PER_U32); i++) {
		u32 bit_offset = i * BITS_PER_U32;
		u32 entry = src[i];
		u32 j;

		for (j = 0; j < BITS_PER_U32; j++) {
		if (entry & BIT(j))
		ice_set_bit((u16)(j + bit_offset), dst);
		}
		}

		/* still need to check the leftover bits (i.e. if size isn't evenly
		* divisible by BITS_PER_U32
		**/
		remaining_bits = size % BITS_PER_U32;
		if (remaining_bits) {
		u32 bit_offset = i * BITS_PER_U32;
		u32 entry = src[i];
		u32 j;

		for (j = 0; j < remaining_bits; j++) {
		if (entry & BIT(j))
		ice_set_bit((u16)(j + bit_offset), dst);
		}
		}
		}

#undef BIT_CHUNK		#undef BIT_CHUNK
#undef BIT_IN_CHUNK		#undef BIT_IN_CHUNK
#undef LAST_CHUNK_BITS		#undef LAST_CHUNK_BITS
#undef LAST_CHUNK_MASK		#undef LAST_CHUNK_MASK

#endif /* _ICE_BITOPS_H_ */		#endif /* _ICE_BITOPS_H_ */