+++ /dev/null
-/*
- * Copyright (c) 2016 Intel Corporation.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef _MISC_H_
-#define _MISC_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-static inline int
-ymm_mask_cmp(const _ymm_t *da, const _ymm_t *sa, const _ymm_t *sm)
-{
- uint64_t ret;
-
- ret = ((da->u64[0] & sm->u64[0]) ^ sa->u64[0]) |
- ((da->u64[1] & sm->u64[1]) ^ sa->u64[1]) |
- ((da->u64[2] & sm->u64[2]) ^ sa->u64[2]) |
- ((da->u64[3] & sm->u64[3]) ^ sa->u64[3]);
-
- return (ret != 0);
-}
-
-/*
- * Setup tx_offload field inside mbuf using raw 64-bit field.
- * Consider to move it into DPDK librte_mbuf.
- */
-static inline uint64_t
-_mbuf_tx_offload(uint64_t il2, uint64_t il3, uint64_t il4, uint64_t tso,
- uint64_t ol3, uint64_t ol2)
-{
- return il2 | il3 << 7 | il4 << 16 | tso << 24 | ol3 << 40 | ol2 << 49;
-}
-
-/*
- * Given the value of mbuf's tx_offload, calculate L4 payload offset.
- */
-static inline uint32_t
-_tx_offload_l4_offset(uint64_t ofl)
-{
- uint32_t l2, l3, l4;
-
- l2 = ofl & 0x7f;
- l3 = ofl >> 7 & 0x1ff;
- l4 = ofl >> 16 & UINT8_MAX;
-
- return l2 + l3 + l4;
-}
-
-/*
- * Routines to calculate L3/L4 checksums in SW.
- * Pretty similar to ones from DPDK librte_net/rte_ip.h,
- * but provide better performance (at least for tested configurations),
- * and extended functionality.
- * Consider to move them into DPDK librte_net/rte_ip.h.
- */
-
-/* make compiler to generate: add %r1, %r2; adc $0, %r1. */
-#define CKSUM_ADD_CARRY(s, v) do { \
- (s) += (v); \
- (s) = ((s) < (v)) ? (s) + 1 : (s); \
-} while (0)
-
-/**
- * Process the non-complemented checksum of a buffer.
- * Similar to rte_raw_cksum(), but provide better perfomance
- * (at least on IA platforms).
- * @param buf
- * Pointer to the buffer.
- * @param len
- * Length of the buffer.
- * @return
- * The non-complemented checksum.
- */
-static inline uint16_t
-__raw_cksum(const uint8_t *buf, uint32_t size)
-{
- uint64_t s, sum;
- uint32_t i, n;
- uint32_t dw1, dw2;
- uint16_t w1, w2;
- const uint64_t *b;
-
- b = (const uint64_t *)buf;
- n = size / sizeof(*b);
- sum = 0;
-
- /* main loop, consume 8 bytes per iteration. */
- for (i = 0; i != n; i++) {
- s = b[i];
- CKSUM_ADD_CARRY(sum, s);
- }
-
- /* consume the remainder. */
- n = size % sizeof(*b);
- if (n != 0) {
- /* position of the of last 8 bytes of data. */
- b = (const uint64_t *)((uintptr_t)(b + i) + n - sizeof(*b));
- /* calculate shift amount. */
- n = (sizeof(*b) - n) * CHAR_BIT;
- s = b[0] >> n;
- CKSUM_ADD_CARRY(sum, s);
- }
-
- /* reduce to 16 bits */
- dw1 = sum;
- dw2 = sum >> 32;
- CKSUM_ADD_CARRY(dw1, dw2);
- w1 = dw1;
- w2 = dw1 >> 16;
- CKSUM_ADD_CARRY(w1, w2);
- return w1;
-}
-
-
-/**
- * Process UDP or TCP checksum over possibly multi-segmented packet.
- * @param mb
- * The pointer to the mbuf with the packet.
- * @param l4_ofs
- * Offset to the beginning of the L4 header (should be in first segment).
- * @param cksum
- * Already pre-calculated pseudo-header checksum value.
- * @return
- * The complemented checksum.
- */
-static inline uint32_t
-__udptcp_mbuf_cksum(const struct rte_mbuf *mb, uint16_t l4_ofs,
- uint32_t cksum)
-{
- uint32_t dlen, i, plen;
- const struct rte_mbuf *ms;
- const void *data;
-
- plen = rte_pktmbuf_pkt_len(mb);
- ms = mb;
-
- for (i = l4_ofs; i < plen && ms != NULL; i += dlen) {
- data = rte_pktmbuf_mtod_offset(ms, const void *, l4_ofs);
- dlen = rte_pktmbuf_data_len(ms) - l4_ofs;
- cksum += __raw_cksum(data, dlen);
- ms = ms->next;
- l4_ofs = 0;
- }
-
- cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
- cksum = (~cksum) & 0xffff;
- if (cksum == 0)
- cksum = 0xffff;
-
- return cksum;
-}
-
-/**
- * Process the pseudo-header checksum of an IPv4 header.
- *
- * Depending on the ol_flags, the pseudo-header checksum expected by the
- * drivers is not the same. For instance, when TSO is enabled, the IP
- * payload length must not be included in the packet.
- *
- * When ol_flags is 0, it computes the standard pseudo-header checksum.
- *
- * @param ipv4_hdr
- * The pointer to the contiguous IPv4 header.
- * @param ipv4_len
- * Length of the IPv4 header.
- * @param ol_flags
- * The ol_flags of the associated mbuf.
- * @return
- * The non-complemented checksum to set in the L4 header.
- */
-static inline uint16_t
-_ipv4x_phdr_cksum(const struct ipv4_hdr *ipv4_hdr, size_t ipv4h_len,
- uint64_t ol_flags)
-{
- uint32_t s0, s1;
-
- s0 = ipv4_hdr->src_addr;
- s1 = ipv4_hdr->dst_addr;
- CKSUM_ADD_CARRY(s0, s1);
-
- if (ol_flags & PKT_TX_TCP_SEG)
- s1 = 0;
- else
- s1 = rte_cpu_to_be_16(
- (uint16_t)(rte_be_to_cpu_16(ipv4_hdr->total_length) -
- ipv4h_len));
-
- s1 += rte_cpu_to_be_16(ipv4_hdr->next_proto_id);
- CKSUM_ADD_CARRY(s0, s1);
-
- return __rte_raw_cksum_reduce(s0);
-}
-
-/**
- * Process the IPv4 UDP or TCP checksum.
- *
- * @param mb
- * The pointer to the IPv4 packet.
- * @param l4_ofs
- * Offset to the beginning of the L4 header (should be in first segment).
- * @param ipv4_hdr
- * The pointer to the contiguous IPv4 header.
- * @return
- * The complemented checksum to set in the IP packet.
- */
-static inline int
-_ipv4_udptcp_mbuf_cksum(const struct rte_mbuf *mb, uint16_t l4_ofs,
- const struct ipv4_hdr *ipv4_hdr)
-{
- uint32_t cksum;
-
- cksum = _ipv4x_phdr_cksum(ipv4_hdr, mb->l3_len, 0);
- cksum = __udptcp_mbuf_cksum(mb, l4_ofs, cksum);
-
- return cksum;
-}
-
-/**
- * Process the IPv6 UDP or TCP checksum.
- *
- * @param mb
- * The pointer to the IPv6 packet.
- * @param l4_ofs
- * Offset to the beginning of the L4 header (should be in first segment).
- * @param ipv6_hdr
- * The pointer to the contiguous IPv6 header.
- * @return
- * The complemented checksum to set in the IP packet.
- */
-static inline int
-_ipv6_udptcp_mbuf_cksum(const struct rte_mbuf *mb, uint16_t l4_ofs,
- const struct ipv6_hdr *ipv6_hdr)
-{
- uint32_t cksum;
-
- cksum = rte_ipv6_phdr_cksum(ipv6_hdr, 0);
- cksum = __udptcp_mbuf_cksum(mb, l4_ofs, cksum);
-
- return cksum;
-}
-
-static inline uint16_t
-_ipv4x_cksum(const void *iph, size_t len)
-{
- uint16_t cksum;
-
- cksum = __raw_cksum(iph, len);
- return (cksum == 0xffff) ? cksum : ~cksum;
-}
-
-
-/*
- * Analog of read-write locks, very much in favour of read side.
- * Assumes, that there are no more then INT32_MAX concurrent readers.
- * Consider to move into DPDK librte_eal.
- */
-
-static inline int
-rwl_try_acquire(rte_atomic32_t *p)
-{
- return rte_atomic32_add_return(p, 1);
-}
-
-static inline void
-rwl_release(rte_atomic32_t *p)
-{
- rte_atomic32_sub(p, 1);
-}
-
-static inline int
-rwl_acquire(rte_atomic32_t *p)
-{
- int32_t rc;
-
- rc = rwl_try_acquire(p);
- if (rc < 0)
- rwl_release(p);
- return rc;
-}
-
-static inline void
-rwl_down(rte_atomic32_t *p)
-{
- while (rte_atomic32_cmpset((volatile uint32_t *)p, 0, INT32_MIN) == 0)
- rte_pause();
-}
-
-static inline void
-rwl_up(rte_atomic32_t *p)
-{
- rte_atomic32_sub(p, INT32_MIN);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _MISC_H_ */
Code Review / tldk.git / blobdiff