#ifndef CSUM_H
#define	CSUM_H

#include <netinet/in.h>
#include <netinet/ip.h>

#include "built_in.h"

static inline unsigned short csum(unsigned short *buf, int nwords)
{
	unsigned long sum;

	for (sum = 0; nwords > 0; nwords--)
		sum += *buf++;
	sum = (sum >> 16) + (sum & 0xffff);
	sum += (sum >> 16);

	return ~sum;
}

static inline uint16_t calc_csum(void *addr, size_t len,
				 int ccsum __maybe_unused)
{
	return csum(addr, len >> 1);
}

static inline uint16_t csum_expected(uint16_t sum, uint16_t computed_sum)
{
	uint32_t shouldbe;

	shouldbe = sum;
	shouldbe += ntohs(computed_sum);
	shouldbe = (shouldbe & 0xFFFF) + (shouldbe >> 16);
	shouldbe = (shouldbe & 0xFFFF) + (shouldbe >> 16);

	return shouldbe;
}

/* Taken and modified from tcpdump, Copyright belongs to them! */

struct cksum_vec {
	const uint8_t *ptr;
	int len;
};

#define ADDCARRY(x)		\
	do { if ((x) > 65535)	\
		(x) -= 65535;	\
	} while (0)

#define REDUCE						\
	do {						\
		l_util.l = sum;				\
		sum = l_util.s[0] + l_util.s[1];	\
		ADDCARRY(sum);				\
	} while (0)

static inline uint16_t __in_cksum(const struct cksum_vec *vec, int veclen)
{
	const uint16_t *w;
	int sum = 0, mlen = 0;
	int byte_swapped = 0;
	union {
		uint8_t c[2];
		uint16_t s;
	} s_util;
	union {
		uint16_t s[2];
		uint32_t l;
	} l_util;

	for (; veclen != 0; vec++, veclen--) {
		if (vec->len == 0)
			continue;

		w = (const uint16_t *) (void *) vec->ptr;

		if (mlen == -1) {
			s_util.c[1] = *(const uint8_t *) w;
			sum += s_util.s;
			w = (const uint16_t *) (void *) ((const uint8_t *) w + 1);
			mlen = vec->len - 1;
		} else
			mlen = vec->len;

		if ((1 & (unsigned long) w) && (mlen > 0)) {
			REDUCE;
			sum <<= 8;
			s_util.c[0] = *(const uint8_t *) w;
			w = (const uint16_t *) (void *) ((const uint8_t *) w + 1);
			mlen--;
			byte_swapped = 1;
		}

		while ((mlen -= 32) >= 0) {
			sum +=  w[0]; sum +=  w[1]; sum +=  w[2]; sum +=  w[3];
			sum +=  w[4]; sum +=  w[5]; sum +=  w[6]; sum +=  w[7];
			sum +=  w[8]; sum +=  w[9]; sum += w[10]; sum += w[11];
			sum += w[12]; sum += w[13]; sum += w[14]; sum += w[15];
			w += 16;
		}

		mlen += 32;

		while ((mlen -= 8) >= 0) {
			sum += w[0]; sum += w[1]; sum += w[2]; sum += w[3];
			w += 4;
		}

		mlen += 8;

		if (mlen == 0 && byte_swapped == 0)
			continue;

		REDUCE;

		while ((mlen -= 2) >= 0) {
			sum += *w++;
		}

		if (byte_swapped) {
			REDUCE;
			sum <<= 8;
			byte_swapped = 0;

			if (mlen == -1) {
				s_util.c[1] = *(const uint8_t *) w;
				sum += s_util.s;
				mlen = 0;
			} else
				mlen = -1;
		} else if (mlen == -1)
			s_util.c[0] = *(const uint8_t *) w;
	}

	if (mlen == -1) {
		s_util.c[1] = 0;
		sum += s_util.s;
	}

	REDUCE;

	return (~sum & 0xffff);
}

static inline uint16_t p4_csum(const struct ip *ip, const uint8_t *data,
			       uint16_t len, uint8_t next_proto)
{
	struct cksum_vec vec[2];
	struct pseudo_hdr {
		uint32_t src;
		uint32_t dst;
		uint8_t mbz;
		uint8_t proto;
		uint16_t len;
	} ph;

	memset(&ph, 0, sizeof(ph));
	ph.len = htons(len);
	ph.mbz = 0;
	ph.proto = next_proto;
	ph.src = ip->ip_src.s_addr;
	ph.dst = ip->ip_dst.s_addr;

	vec[0].ptr = (const uint8_t *) (void *) &ph;
	vec[0].len = sizeof(ph);

	vec[1].ptr = data;
	vec[1].len = len;

	return __in_cksum(vec, 2);
}

#endif /* CSUM_H */
2efe9d4a354153e99d86a16af08'>generic.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='11e3b725cfc282efe9d4a354153e99d86a16af08'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-01-17 13:46:29 +0000</td></tr>
<tr><th>committer</th><td>Herbert Xu &lt;herbert@gondor.apana.org.au&gt;</td><td class='right'>2017-01-23 22:41:33 +0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/core/generic.c?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>11e3b725cfc282efe9d4a354153e99d86a16af08</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/core/generic.c?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/core/generic.c?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>drivers/usb/core/generic.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/core/generic.c?id=d6040764adcb5cb6de1489422411d701c158bb69'>d6040764adcb5cb6de1489422411d701c158bb69</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/core/generic.c?id=11e3b725cfc282efe9d4a354153e99d86a16af08&amp;id2=d6040764adcb5cb6de1489422411d701c158bb69'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes</div><div class='commit-msg'>Update the ARMv8 Crypto Extensions and the plain NEON AES implementations
in CBC and CTR modes to return the next IV back to the skcipher API client.
This is necessary for chaining to work correctly.

Note that for CTR, this is only done if the request is a round multiple of
the block size, since otherwise, chaining is impossible anyway.

Cc: &lt;stable@vger.kernel.org&gt; # v3.16+
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>Diffstat</a> (limited to 'drivers/usb/core/generic.c')</div><table summary='diffstat' class='diffstat'>