+++ /dev/null
-/*
- * Copyright 2008-2014 Cisco Systems, Inc. All rights reserved.
- * Copyright 2007 Nuova Systems, Inc. All rights reserved.
- *
- * Copyright (c) 2014, Cisco Systems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <rte_mbuf.h>
-#include <rte_ethdev.h>
-#include <rte_prefetch.h>
-
-#include "enic_compat.h"
-#include "rq_enet_desc.h"
-#include "enic.h"
-
-#define RTE_PMD_USE_PREFETCH
-
-#ifdef RTE_PMD_USE_PREFETCH
-/*
- * Prefetch a cache line into all cache levels.
- */
-#define rte_enic_prefetch(p) rte_prefetch0(p)
-#else
-#define rte_enic_prefetch(p) do {} while (0)
-#endif
-
-#ifdef RTE_PMD_PACKET_PREFETCH
-#define rte_packet_prefetch(p) rte_prefetch1(p)
-#else
-#define rte_packet_prefetch(p) do {} while (0)
-#endif
-
-static inline struct rte_mbuf *
-rte_rxmbuf_alloc(struct rte_mempool *mp)
-{
- struct rte_mbuf *m;
-
- m = __rte_mbuf_raw_alloc(mp);
- __rte_mbuf_sanity_check_raw(m, 0);
- return m;
-}
-
-static inline uint16_t
-enic_cq_rx_desc_ciflags(struct cq_enet_rq_desc *crd)
-{
- return le16_to_cpu(crd->completed_index_flags) & ~CQ_DESC_COMP_NDX_MASK;
-}
-
-static inline uint16_t
-enic_cq_rx_desc_bwflags(struct cq_enet_rq_desc *crd)
-{
- return(le16_to_cpu(crd->bytes_written_flags) &
- ~CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_packet_error(uint16_t bwflags)
-{
- return((bwflags & CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ==
- CQ_ENET_RQ_DESC_FLAGS_TRUNCATED);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_eop(uint16_t ciflags)
-{
- return (ciflags & CQ_ENET_RQ_DESC_FLAGS_EOP)
- == CQ_ENET_RQ_DESC_FLAGS_EOP;
-}
-
-static inline uint8_t
-enic_cq_rx_desc_csum_not_calc(struct cq_enet_rq_desc *cqrd)
-{
- return ((le16_to_cpu(cqrd->q_number_rss_type_flags) &
- CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ==
- CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_ipv4_csum_ok(struct cq_enet_rq_desc *cqrd)
-{
- return ((cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ==
- CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_tcp_udp_csum_ok(struct cq_enet_rq_desc *cqrd)
-{
- return((cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ==
- CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_rss_type(struct cq_enet_rq_desc *cqrd)
-{
- return (uint8_t)((le16_to_cpu(cqrd->q_number_rss_type_flags) >>
- CQ_DESC_Q_NUM_BITS) & CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
-}
-
-static inline uint32_t
-enic_cq_rx_desc_rss_hash(struct cq_enet_rq_desc *cqrd)
-{
- return le32_to_cpu(cqrd->rss_hash);
-}
-
-static inline uint16_t
-enic_cq_rx_desc_vlan(struct cq_enet_rq_desc *cqrd)
-{
- return le16_to_cpu(cqrd->vlan);
-}
-
-static inline uint16_t
-enic_cq_rx_desc_n_bytes(struct cq_desc *cqd)
-{
- struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
- return le16_to_cpu(cqrd->bytes_written_flags) &
- CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
-}
-
-static inline uint8_t
-enic_cq_rx_to_pkt_err_flags(struct cq_desc *cqd, uint64_t *pkt_err_flags_out)
-{
- struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
- uint16_t bwflags;
- int ret = 0;
- uint64_t pkt_err_flags = 0;
-
- bwflags = enic_cq_rx_desc_bwflags(cqrd);
- if (unlikely(enic_cq_rx_desc_packet_error(bwflags))) {
- pkt_err_flags = PKT_RX_MAC_ERR;
- ret = 1;
- }
- *pkt_err_flags_out = pkt_err_flags;
- return ret;
-}
-
-/*
- * Lookup table to translate RX CQ flags to mbuf flags.
- */
-static inline uint32_t
-enic_cq_rx_flags_to_pkt_type(struct cq_desc *cqd)
-{
- struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
- uint8_t cqrd_flags = cqrd->flags;
- static const uint32_t cq_type_table[128] __rte_cache_aligned = {
- [32] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4,
- [34] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
- | RTE_PTYPE_L4_UDP,
- [36] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
- | RTE_PTYPE_L4_TCP,
- [96] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
- | RTE_PTYPE_L4_FRAG,
- [16] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6,
- [18] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
- | RTE_PTYPE_L4_UDP,
- [20] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
- | RTE_PTYPE_L4_TCP,
- [80] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
- | RTE_PTYPE_L4_FRAG,
- /* All others reserved */
- };
- cqrd_flags &= CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT
- | CQ_ENET_RQ_DESC_FLAGS_IPV4 | CQ_ENET_RQ_DESC_FLAGS_IPV6
- | CQ_ENET_RQ_DESC_FLAGS_TCP | CQ_ENET_RQ_DESC_FLAGS_UDP;
- return cq_type_table[cqrd_flags];
-}
-
-static inline void
-enic_cq_rx_to_pkt_flags(struct cq_desc *cqd, struct rte_mbuf *mbuf)
-{
- struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
- uint16_t ciflags, bwflags, pkt_flags = 0;
- ciflags = enic_cq_rx_desc_ciflags(cqrd);
- bwflags = enic_cq_rx_desc_bwflags(cqrd);
-
- mbuf->ol_flags = 0;
-
- /* flags are meaningless if !EOP */
- if (unlikely(!enic_cq_rx_desc_eop(ciflags)))
- goto mbuf_flags_done;
-
- /* VLAN stripping */
- if (bwflags & CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) {
- pkt_flags |= PKT_RX_VLAN_PKT;
- mbuf->vlan_tci = enic_cq_rx_desc_vlan(cqrd);
- } else {
- mbuf->vlan_tci = 0;
- }
-
- /* RSS flag */
- if (enic_cq_rx_desc_rss_type(cqrd)) {
- pkt_flags |= PKT_RX_RSS_HASH;
- mbuf->hash.rss = enic_cq_rx_desc_rss_hash(cqrd);
- }
-
- /* checksum flags */
- if (!enic_cq_rx_desc_csum_not_calc(cqrd) &&
- (mbuf->packet_type & RTE_PTYPE_L3_IPV4)) {
- if (unlikely(!enic_cq_rx_desc_ipv4_csum_ok(cqrd)))
- pkt_flags |= PKT_RX_IP_CKSUM_BAD;
- if (mbuf->packet_type & (RTE_PTYPE_L4_UDP | RTE_PTYPE_L4_TCP)) {
- if (unlikely(!enic_cq_rx_desc_tcp_udp_csum_ok(cqrd)))
- pkt_flags |= PKT_RX_L4_CKSUM_BAD;
- }
- }
-
- mbuf_flags_done:
- mbuf->ol_flags = pkt_flags;
-}
-
-static inline uint32_t
-enic_ring_add(uint32_t n_descriptors, uint32_t i0, uint32_t i1)
-{
- uint32_t d = i0 + i1;
- ASSERT(i0 < n_descriptors);
- ASSERT(i1 < n_descriptors);
- d -= (d >= n_descriptors) ? n_descriptors : 0;
- return d;
-}
-
-
-uint16_t
-enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
- uint16_t nb_pkts)
-{
- struct vnic_rq *rq = rx_queue;
- struct enic *enic = vnic_dev_priv(rq->vdev);
- unsigned int rx_id;
- struct rte_mbuf *nmb, *rxmb;
- uint16_t nb_rx = 0;
- uint16_t nb_hold;
- struct vnic_cq *cq;
- volatile struct cq_desc *cqd_ptr;
- uint8_t color;
-
- cq = &enic->cq[enic_cq_rq(enic, rq->index)];
- rx_id = cq->to_clean; /* index of cqd, rqd, mbuf_table */
- cqd_ptr = (struct cq_desc *)(cq->ring.descs) + rx_id;
-
- nb_hold = rq->rx_nb_hold; /* mbufs held by software */
-
- while (nb_rx < nb_pkts) {
- volatile struct rq_enet_desc *rqd_ptr;
- dma_addr_t dma_addr;
- struct cq_desc cqd;
- uint64_t ol_err_flags;
- uint8_t packet_error;
-
- /* Check for pkts available */
- color = (cqd_ptr->type_color >> CQ_DESC_COLOR_SHIFT)
- & CQ_DESC_COLOR_MASK;
- if (color == cq->last_color)
- break;
-
- /* Get the cq descriptor and rq pointer */
- cqd = *cqd_ptr;
- rqd_ptr = (struct rq_enet_desc *)(rq->ring.descs) + rx_id;
-
- /* allocate a new mbuf */
- nmb = rte_rxmbuf_alloc(rq->mp);
- if (nmb == NULL) {
- dev_err(enic, "RX mbuf alloc failed port=%u qid=%u",
- enic->port_id, (unsigned)rq->index);
- rte_eth_devices[enic->port_id].
- data->rx_mbuf_alloc_failed++;
- break;
- }
-
- /* A packet error means descriptor and data are untrusted */
- packet_error = enic_cq_rx_to_pkt_err_flags(&cqd, &ol_err_flags);
-
- /* Get the mbuf to return and replace with one just allocated */
- rxmb = rq->mbuf_ring[rx_id];
- rq->mbuf_ring[rx_id] = nmb;
-
- /* Increment cqd, rqd, mbuf_table index */
- rx_id++;
- if (unlikely(rx_id == rq->ring.desc_count)) {
- rx_id = 0;
- cq->last_color = cq->last_color ? 0 : 1;
- }
-
- /* Prefetch next mbuf & desc while processing current one */
- cqd_ptr = (struct cq_desc *)(cq->ring.descs) + rx_id;
- rte_enic_prefetch(cqd_ptr);
- rte_enic_prefetch(rq->mbuf_ring[rx_id]);
- rte_enic_prefetch((struct rq_enet_desc *)(rq->ring.descs)
- + rx_id);
-
- /* Push descriptor for newly allocated mbuf */
- dma_addr = (dma_addr_t)(nmb->buf_physaddr + nmb->data_off);
- rqd_ptr->address = rte_cpu_to_le_64(dma_addr);
- rqd_ptr->length_type = cpu_to_le16(nmb->buf_len);
-
- /* Fill in the rest of the mbuf */
- rxmb->data_off = RTE_PKTMBUF_HEADROOM;
- rxmb->nb_segs = 1;
- rxmb->next = NULL;
- rxmb->port = enic->port_id;
- if (!packet_error) {
- rxmb->pkt_len = enic_cq_rx_desc_n_bytes(&cqd);
- rxmb->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
- enic_cq_rx_to_pkt_flags(&cqd, rxmb);
- } else {
- rxmb->pkt_len = 0;
- rxmb->packet_type = 0;
- rxmb->ol_flags = 0;
- }
- rxmb->data_len = rxmb->pkt_len;
-
- /* prefetch mbuf data for caller */
- rte_packet_prefetch(RTE_PTR_ADD(rxmb->buf_addr,
- RTE_PKTMBUF_HEADROOM));
-
- /* store the mbuf address into the next entry of the array */
- rx_pkts[nb_rx++] = rxmb;
- }
-
- nb_hold += nb_rx;
- cq->to_clean = rx_id;
-
- if (nb_hold > rq->rx_free_thresh) {
- rq->posted_index = enic_ring_add(rq->ring.desc_count,
- rq->posted_index, nb_hold);
- nb_hold = 0;
- rte_mb();
- iowrite32(rq->posted_index, &rq->ctrl->posted_index);
- }
-
- rq->rx_nb_hold = nb_hold;
-
- return nb_rx;
-}
Code Review / deb_dpdk.git / blobdiff