--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) 2016 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ *
+ * 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 OWNER 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.
+ */
+
+/* EF10 native datapath implementation */
+
+#include <stdbool.h>
+
+#include <rte_byteorder.h>
+#include <rte_mbuf_ptype.h>
+#include <rte_mbuf.h>
+#include <rte_io.h>
+
+#include "efx.h"
+#include "efx_types.h"
+#include "efx_regs.h"
+#include "efx_regs_ef10.h"
+
+#include "sfc_tweak.h"
+#include "sfc_dp_rx.h"
+#include "sfc_kvargs.h"
+#include "sfc_ef10.h"
+
+#define sfc_ef10_rx_err(dpq, ...) \
+ SFC_DP_LOG(SFC_KVARG_DATAPATH_EF10, ERR, dpq, __VA_ARGS__)
+
+/**
+ * Alignment requirement for value written to RX WPTR:
+ * the WPTR must be aligned to an 8 descriptor boundary.
+ */
+#define SFC_EF10_RX_WPTR_ALIGN 8
+
+/**
+ * Maximum number of descriptors/buffers in the Rx ring.
+ * It should guarantee that corresponding event queue never overfill.
+ * EF10 native datapath uses event queue of the same size as Rx queue.
+ * Maximum number of events on datapath can be estimated as number of
+ * Rx queue entries (one event per Rx buffer in the worst case) plus
+ * Rx error and flush events.
+ */
+#define SFC_EF10_RXQ_LIMIT(_ndesc) \
+ ((_ndesc) - 1 /* head must not step on tail */ - \
+ (SFC_EF10_EV_PER_CACHE_LINE - 1) /* max unused EvQ entries */ - \
+ 1 /* Rx error */ - 1 /* flush */)
+
+struct sfc_ef10_rx_sw_desc {
+ struct rte_mbuf *mbuf;
+};
+
+struct sfc_ef10_rxq {
+ /* Used on data path */
+ unsigned int flags;
+#define SFC_EF10_RXQ_STARTED 0x1
+#define SFC_EF10_RXQ_NOT_RUNNING 0x2
+#define SFC_EF10_RXQ_EXCEPTION 0x4
+#define SFC_EF10_RXQ_RSS_HASH 0x8
+ unsigned int ptr_mask;
+ unsigned int prepared;
+ unsigned int completed;
+ unsigned int evq_read_ptr;
+ efx_qword_t *evq_hw_ring;
+ struct sfc_ef10_rx_sw_desc *sw_ring;
+ uint64_t rearm_data;
+ uint16_t prefix_size;
+
+ /* Used on refill */
+ uint16_t buf_size;
+ unsigned int added;
+ unsigned int refill_threshold;
+ struct rte_mempool *refill_mb_pool;
+ efx_qword_t *rxq_hw_ring;
+ volatile void *doorbell;
+
+ /* Datapath receive queue anchor */
+ struct sfc_dp_rxq dp;
+};
+
+static inline struct sfc_ef10_rxq *
+sfc_ef10_rxq_by_dp_rxq(struct sfc_dp_rxq *dp_rxq)
+{
+ return container_of(dp_rxq, struct sfc_ef10_rxq, dp);
+}
+
+static void
+sfc_ef10_rx_qpush(struct sfc_ef10_rxq *rxq)
+{
+ efx_dword_t dword;
+
+ /* Hardware has alignment restriction for WPTR */
+ RTE_BUILD_BUG_ON(SFC_RX_REFILL_BULK % SFC_EF10_RX_WPTR_ALIGN != 0);
+ SFC_ASSERT(RTE_ALIGN(rxq->added, SFC_EF10_RX_WPTR_ALIGN) == rxq->added);
+
+ EFX_POPULATE_DWORD_1(dword, ERF_DZ_RX_DESC_WPTR,
+ rxq->added & rxq->ptr_mask);
+
+ /* DMA sync to device is not required */
+
+ /*
+ * rte_write32() has rte_io_wmb() which guarantees that the STORE
+ * operations (i.e. Rx and event descriptor updates) that precede
+ * the rte_io_wmb() call are visible to NIC before the STORE
+ * operations that follow it (i.e. doorbell write).
+ */
+ rte_write32(dword.ed_u32[0], rxq->doorbell);
+}
+
+static void
+sfc_ef10_rx_qrefill(struct sfc_ef10_rxq *rxq)
+{
+ const unsigned int ptr_mask = rxq->ptr_mask;
+ const uint32_t buf_size = rxq->buf_size;
+ unsigned int free_space;
+ unsigned int bulks;
+ void *objs[SFC_RX_REFILL_BULK];
+ unsigned int added = rxq->added;
+
+ free_space = SFC_EF10_RXQ_LIMIT(ptr_mask + 1) -
+ (added - rxq->completed);
+
+ if (free_space < rxq->refill_threshold)
+ return;
+
+ bulks = free_space / RTE_DIM(objs);
+ /* refill_threshold guarantees that bulks is positive */
+ SFC_ASSERT(bulks > 0);
+
+ do {
+ unsigned int id;
+ unsigned int i;
+
+ if (unlikely(rte_mempool_get_bulk(rxq->refill_mb_pool, objs,
+ RTE_DIM(objs)) < 0)) {
+ struct rte_eth_dev_data *dev_data =
+ rte_eth_devices[rxq->dp.dpq.port_id].data;
+
+ /*
+ * It is hardly a safe way to increment counter
+ * from different contexts, but all PMDs do it.
+ */
+ dev_data->rx_mbuf_alloc_failed += RTE_DIM(objs);
+ /* Return if we have posted nothing yet */
+ if (added == rxq->added)
+ return;
+ /* Push posted */
+ break;
+ }
+
+ for (i = 0, id = added & ptr_mask;
+ i < RTE_DIM(objs);
+ ++i, ++id) {
+ struct rte_mbuf *m = objs[i];
+ struct sfc_ef10_rx_sw_desc *rxd;
+ phys_addr_t phys_addr;
+
+ SFC_ASSERT((id & ~ptr_mask) == 0);
+ rxd = &rxq->sw_ring[id];
+ rxd->mbuf = m;
+
+ /*
+ * Avoid writing to mbuf. It is cheaper to do it
+ * when we receive packet and fill in nearby
+ * structure members.
+ */
+
+ phys_addr = rte_mbuf_data_dma_addr_default(m);
+ EFX_POPULATE_QWORD_2(rxq->rxq_hw_ring[id],
+ ESF_DZ_RX_KER_BYTE_CNT, buf_size,
+ ESF_DZ_RX_KER_BUF_ADDR, phys_addr);
+ }
+
+ added += RTE_DIM(objs);
+ } while (--bulks > 0);
+
+ SFC_ASSERT(rxq->added != added);
+ rxq->added = added;
+ sfc_ef10_rx_qpush(rxq);
+}
+
+static void
+sfc_ef10_rx_prefetch_next(struct sfc_ef10_rxq *rxq, unsigned int next_id)
+{
+ struct rte_mbuf *next_mbuf;
+
+ /* Prefetch next bunch of software descriptors */
+ if ((next_id % (RTE_CACHE_LINE_SIZE / sizeof(rxq->sw_ring[0]))) == 0)
+ rte_prefetch0(&rxq->sw_ring[next_id]);
+
+ /*
+ * It looks strange to prefetch depending on previous prefetch
+ * data, but measurements show that it is really efficient and
+ * increases packet rate.
+ */
+ next_mbuf = rxq->sw_ring[next_id].mbuf;
+ if (likely(next_mbuf != NULL)) {
+ /* Prefetch the next mbuf structure */
+ rte_mbuf_prefetch_part1(next_mbuf);
+
+ /* Prefetch pseudo header of the next packet */
+ /* data_off is not filled in yet */
+ /* Yes, data could be not ready yet, but we hope */
+ rte_prefetch0((uint8_t *)next_mbuf->buf_addr +
+ RTE_PKTMBUF_HEADROOM);
+ }
+}
+
+static uint16_t
+sfc_ef10_rx_prepared(struct sfc_ef10_rxq *rxq, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ uint16_t n_rx_pkts = RTE_MIN(nb_pkts, rxq->prepared);
+ unsigned int completed = rxq->completed;
+ unsigned int i;
+
+ rxq->prepared -= n_rx_pkts;
+ rxq->completed = completed + n_rx_pkts;
+
+ for (i = 0; i < n_rx_pkts; ++i, ++completed)
+ rx_pkts[i] = rxq->sw_ring[completed & rxq->ptr_mask].mbuf;
+
+ return n_rx_pkts;
+}
+
+static void
+sfc_ef10_rx_ev_to_offloads(struct sfc_ef10_rxq *rxq, const efx_qword_t rx_ev,
+ struct rte_mbuf *m)
+{
+ uint32_t l2_ptype = 0;
+ uint32_t l3_ptype = 0;
+ uint32_t l4_ptype = 0;
+ uint64_t ol_flags = 0;
+
+ if (unlikely(EFX_TEST_QWORD_BIT(rx_ev, ESF_DZ_RX_PARSE_INCOMPLETE_LBN)))
+ goto done;
+
+ switch (EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_ETH_TAG_CLASS)) {
+ case ESE_DZ_ETH_TAG_CLASS_NONE:
+ l2_ptype = RTE_PTYPE_L2_ETHER;
+ break;
+ case ESE_DZ_ETH_TAG_CLASS_VLAN1:
+ l2_ptype = RTE_PTYPE_L2_ETHER_VLAN;
+ break;
+ case ESE_DZ_ETH_TAG_CLASS_VLAN2:
+ l2_ptype = RTE_PTYPE_L2_ETHER_QINQ;
+ break;
+ default:
+ /* Unexpected Eth tag class */
+ SFC_ASSERT(false);
+ }
+
+ switch (EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_L3_CLASS)) {
+ case ESE_DZ_L3_CLASS_IP4_FRAG:
+ l4_ptype = RTE_PTYPE_L4_FRAG;
+ /* FALLTHROUGH */
+ case ESE_DZ_L3_CLASS_IP4:
+ l3_ptype = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
+ ol_flags |= PKT_RX_RSS_HASH |
+ ((EFX_TEST_QWORD_BIT(rx_ev,
+ ESF_DZ_RX_IPCKSUM_ERR_LBN)) ?
+ PKT_RX_IP_CKSUM_BAD : PKT_RX_IP_CKSUM_GOOD);
+ break;
+ case ESE_DZ_L3_CLASS_IP6_FRAG:
+ l4_ptype |= RTE_PTYPE_L4_FRAG;
+ /* FALLTHROUGH */
+ case ESE_DZ_L3_CLASS_IP6:
+ l3_ptype |= RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
+ ol_flags |= PKT_RX_RSS_HASH;
+ break;
+ case ESE_DZ_L3_CLASS_ARP:
+ /* Override Layer 2 packet type */
+ l2_ptype = RTE_PTYPE_L2_ETHER_ARP;
+ break;
+ default:
+ /* Unexpected Layer 3 class */
+ SFC_ASSERT(false);
+ }
+
+ switch (EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_L4_CLASS)) {
+ case ESE_DZ_L4_CLASS_TCP:
+ l4_ptype = RTE_PTYPE_L4_TCP;
+ ol_flags |=
+ (EFX_TEST_QWORD_BIT(rx_ev,
+ ESF_DZ_RX_TCPUDP_CKSUM_ERR_LBN)) ?
+ PKT_RX_L4_CKSUM_BAD : PKT_RX_L4_CKSUM_GOOD;
+ break;
+ case ESE_DZ_L4_CLASS_UDP:
+ l4_ptype = RTE_PTYPE_L4_UDP;
+ ol_flags |=
+ (EFX_TEST_QWORD_BIT(rx_ev,
+ ESF_DZ_RX_TCPUDP_CKSUM_ERR_LBN)) ?
+ PKT_RX_L4_CKSUM_BAD : PKT_RX_L4_CKSUM_GOOD;
+ break;
+ case ESE_DZ_L4_CLASS_UNKNOWN:
+ break;
+ default:
+ /* Unexpected Layer 4 class */
+ SFC_ASSERT(false);
+ }
+
+ /* Remove RSS hash offload flag if RSS is not enabled */
+ if (~rxq->flags & SFC_EF10_RXQ_RSS_HASH)
+ ol_flags &= ~PKT_RX_RSS_HASH;
+
+done:
+ m->ol_flags = ol_flags;
+ m->packet_type = l2_ptype | l3_ptype | l4_ptype;
+}
+
+static uint16_t
+sfc_ef10_rx_pseudo_hdr_get_len(const uint8_t *pseudo_hdr)
+{
+ return rte_le_to_cpu_16(*(const uint16_t *)&pseudo_hdr[8]);
+}
+
+static uint32_t
+sfc_ef10_rx_pseudo_hdr_get_hash(const uint8_t *pseudo_hdr)
+{
+ return rte_le_to_cpu_32(*(const uint32_t *)pseudo_hdr);
+}
+
+static uint16_t
+sfc_ef10_rx_process_event(struct sfc_ef10_rxq *rxq, efx_qword_t rx_ev,
+ struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+ const unsigned int ptr_mask = rxq->ptr_mask;
+ unsigned int completed = rxq->completed;
+ unsigned int ready;
+ struct sfc_ef10_rx_sw_desc *rxd;
+ struct rte_mbuf *m;
+ struct rte_mbuf *m0;
+ uint16_t n_rx_pkts;
+ const uint8_t *pseudo_hdr;
+ uint16_t pkt_len;
+
+ ready = (EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_DSC_PTR_LBITS) - completed) &
+ EFX_MASK32(ESF_DZ_RX_DSC_PTR_LBITS);
+ SFC_ASSERT(ready > 0);
+
+ if (rx_ev.eq_u64[0] &
+ rte_cpu_to_le_64((1ull << ESF_DZ_RX_ECC_ERR_LBN) |
+ (1ull << ESF_DZ_RX_ECRC_ERR_LBN))) {
+ SFC_ASSERT(rxq->prepared == 0);
+ rxq->completed += ready;
+ while (ready-- > 0) {
+ rxd = &rxq->sw_ring[completed++ & ptr_mask];
+ rte_mempool_put(rxq->refill_mb_pool, rxd->mbuf);
+ }
+ return 0;
+ }
+
+ n_rx_pkts = RTE_MIN(ready, nb_pkts);
+ rxq->prepared = ready - n_rx_pkts;
+ rxq->completed += n_rx_pkts;
+
+ rxd = &rxq->sw_ring[completed++ & ptr_mask];
+
+ sfc_ef10_rx_prefetch_next(rxq, completed & ptr_mask);
+
+ m = rxd->mbuf;
+
+ *rx_pkts++ = m;
+
+ RTE_BUILD_BUG_ON(sizeof(m->rearm_data[0]) != sizeof(rxq->rearm_data));
+ m->rearm_data[0] = rxq->rearm_data;
+
+ /* Classify packet based on Rx event */
+ sfc_ef10_rx_ev_to_offloads(rxq, rx_ev, m);
+
+ /* data_off already moved past pseudo header */
+ pseudo_hdr = (uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM;
+
+ /*
+ * Always get RSS hash from pseudo header to avoid
+ * condition/branching. If it is valid or not depends on
+ * PKT_RX_RSS_HASH in m->ol_flags.
+ */
+ m->hash.rss = sfc_ef10_rx_pseudo_hdr_get_hash(pseudo_hdr);
+
+ if (ready == 1)
+ pkt_len = EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_BYTES) -
+ rxq->prefix_size;
+ else
+ pkt_len = sfc_ef10_rx_pseudo_hdr_get_len(pseudo_hdr);
+ SFC_ASSERT(pkt_len > 0);
+ rte_pktmbuf_data_len(m) = pkt_len;
+ rte_pktmbuf_pkt_len(m) = pkt_len;
+
+ SFC_ASSERT(m->next == NULL);
+
+ /* Remember mbuf to copy offload flags and packet type from */
+ m0 = m;
+ for (--ready; ready > 0; --ready) {
+ rxd = &rxq->sw_ring[completed++ & ptr_mask];
+
+ sfc_ef10_rx_prefetch_next(rxq, completed & ptr_mask);
+
+ m = rxd->mbuf;
+
+ if (ready > rxq->prepared)
+ *rx_pkts++ = m;
+
+ RTE_BUILD_BUG_ON(sizeof(m->rearm_data[0]) !=
+ sizeof(rxq->rearm_data));
+ m->rearm_data[0] = rxq->rearm_data;
+
+ /* Event-dependent information is the same */
+ m->ol_flags = m0->ol_flags;
+ m->packet_type = m0->packet_type;
+
+ /* data_off already moved past pseudo header */
+ pseudo_hdr = (uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM;
+
+ /*
+ * Always get RSS hash from pseudo header to avoid
+ * condition/branching. If it is valid or not depends on
+ * PKT_RX_RSS_HASH in m->ol_flags.
+ */
+ m->hash.rss = sfc_ef10_rx_pseudo_hdr_get_hash(pseudo_hdr);
+
+ pkt_len = sfc_ef10_rx_pseudo_hdr_get_len(pseudo_hdr);
+ SFC_ASSERT(pkt_len > 0);
+ rte_pktmbuf_data_len(m) = pkt_len;
+ rte_pktmbuf_pkt_len(m) = pkt_len;
+
+ SFC_ASSERT(m->next == NULL);
+ }
+
+ return n_rx_pkts;
+}
+
+static bool
+sfc_ef10_rx_get_event(struct sfc_ef10_rxq *rxq, efx_qword_t *rx_ev)
+{
+ *rx_ev = rxq->evq_hw_ring[rxq->evq_read_ptr & rxq->ptr_mask];
+
+ if (!sfc_ef10_ev_present(*rx_ev))
+ return false;
+
+ if (unlikely(EFX_QWORD_FIELD(*rx_ev, FSF_AZ_EV_CODE) !=
+ FSE_AZ_EV_CODE_RX_EV)) {
+ /*
+ * Do not move read_ptr to keep the event for exception
+ * handling by the control path.
+ */
+ rxq->flags |= SFC_EF10_RXQ_EXCEPTION;
+ sfc_ef10_rx_err(&rxq->dp.dpq,
+ "RxQ exception at EvQ read ptr %#x",
+ rxq->evq_read_ptr);
+ return false;
+ }
+
+ rxq->evq_read_ptr++;
+ return true;
+}
+
+static uint16_t
+sfc_ef10_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+ struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(rx_queue);
+ unsigned int evq_old_read_ptr;
+ uint16_t n_rx_pkts;
+ efx_qword_t rx_ev;
+
+ if (unlikely(rxq->flags &
+ (SFC_EF10_RXQ_NOT_RUNNING | SFC_EF10_RXQ_EXCEPTION)))
+ return 0;
+
+ n_rx_pkts = sfc_ef10_rx_prepared(rxq, rx_pkts, nb_pkts);
+
+ evq_old_read_ptr = rxq->evq_read_ptr;
+ while (n_rx_pkts != nb_pkts && sfc_ef10_rx_get_event(rxq, &rx_ev)) {
+ /*
+ * DROP_EVENT is an internal to the NIC, software should
+ * never see it and, therefore, may ignore it.
+ */
+
+ n_rx_pkts += sfc_ef10_rx_process_event(rxq, rx_ev,
+ rx_pkts + n_rx_pkts,
+ nb_pkts - n_rx_pkts);
+ }
+
+ sfc_ef10_ev_qclear(rxq->evq_hw_ring, rxq->ptr_mask, evq_old_read_ptr,
+ rxq->evq_read_ptr);
+
+ /* It is not a problem if we refill in the case of exception */
+ sfc_ef10_rx_qrefill(rxq);
+
+ return n_rx_pkts;
+}
+
+static const uint32_t *
+sfc_ef10_supported_ptypes_get(void)
+{
+ static const uint32_t ef10_native_ptypes[] = {
+ RTE_PTYPE_L2_ETHER,
+ RTE_PTYPE_L2_ETHER_ARP,
+ RTE_PTYPE_L2_ETHER_VLAN,
+ RTE_PTYPE_L2_ETHER_QINQ,
+ RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
+ RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
+ RTE_PTYPE_L4_FRAG,
+ RTE_PTYPE_L4_TCP,
+ RTE_PTYPE_L4_UDP,
+ RTE_PTYPE_UNKNOWN
+ };
+
+ return ef10_native_ptypes;
+}
+
+static sfc_dp_rx_qdesc_npending_t sfc_ef10_rx_qdesc_npending;
+static unsigned int
+sfc_ef10_rx_qdesc_npending(__rte_unused struct sfc_dp_rxq *dp_rxq)
+{
+ /*
+ * Correct implementation requires EvQ polling and events
+ * processing (keeping all ready mbufs in prepared).
+ */
+ return -ENOTSUP;
+}
+
+
+static uint64_t
+sfc_ef10_mk_mbuf_rearm_data(uint16_t port_id, uint16_t prefix_size)
+{
+ struct rte_mbuf m;
+
+ memset(&m, 0, sizeof(m));
+
+ rte_mbuf_refcnt_set(&m, 1);
+ m.data_off = RTE_PKTMBUF_HEADROOM + prefix_size;
+ m.nb_segs = 1;
+ m.port = port_id;
+
+ /* rearm_data covers structure members filled in above */
+ rte_compiler_barrier();
+ RTE_BUILD_BUG_ON(sizeof(m.rearm_data[0]) != sizeof(uint64_t));
+ return m.rearm_data[0];
+}
+
+static sfc_dp_rx_qcreate_t sfc_ef10_rx_qcreate;
+static int
+sfc_ef10_rx_qcreate(uint16_t port_id, uint16_t queue_id,
+ const struct rte_pci_addr *pci_addr, int socket_id,
+ const struct sfc_dp_rx_qcreate_info *info,
+ struct sfc_dp_rxq **dp_rxqp)
+{
+ struct sfc_ef10_rxq *rxq;
+ int rc;
+
+ rc = EINVAL;
+ if (info->rxq_entries != info->evq_entries)
+ goto fail_rxq_args;
+
+ rc = ENOMEM;
+ rxq = rte_zmalloc_socket("sfc-ef10-rxq", sizeof(*rxq),
+ RTE_CACHE_LINE_SIZE, socket_id);
+ if (rxq == NULL)
+ goto fail_rxq_alloc;
+
+ sfc_dp_queue_init(&rxq->dp.dpq, port_id, queue_id, pci_addr);
+
+ rc = ENOMEM;
+ rxq->sw_ring = rte_calloc_socket("sfc-ef10-rxq-sw_ring",
+ info->rxq_entries,
+ sizeof(*rxq->sw_ring),
+ RTE_CACHE_LINE_SIZE, socket_id);
+ if (rxq->sw_ring == NULL)
+ goto fail_desc_alloc;
+
+ rxq->flags |= SFC_EF10_RXQ_NOT_RUNNING;
+ if (info->flags & SFC_RXQ_FLAG_RSS_HASH)
+ rxq->flags |= SFC_EF10_RXQ_RSS_HASH;
+ rxq->ptr_mask = info->rxq_entries - 1;
+ rxq->evq_hw_ring = info->evq_hw_ring;
+ rxq->refill_threshold = info->refill_threshold;
+ rxq->rearm_data =
+ sfc_ef10_mk_mbuf_rearm_data(port_id, info->prefix_size);
+ rxq->prefix_size = info->prefix_size;
+ rxq->buf_size = info->buf_size;
+ rxq->refill_mb_pool = info->refill_mb_pool;
+ rxq->rxq_hw_ring = info->rxq_hw_ring;
+ rxq->doorbell = (volatile uint8_t *)info->mem_bar +
+ ER_DZ_RX_DESC_UPD_REG_OFST +
+ info->hw_index * ER_DZ_RX_DESC_UPD_REG_STEP;
+
+ *dp_rxqp = &rxq->dp;
+ return 0;
+
+fail_desc_alloc:
+ rte_free(rxq);
+
+fail_rxq_alloc:
+fail_rxq_args:
+ return rc;
+}
+
+static sfc_dp_rx_qdestroy_t sfc_ef10_rx_qdestroy;
+static void
+sfc_ef10_rx_qdestroy(struct sfc_dp_rxq *dp_rxq)
+{
+ struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
+
+ rte_free(rxq->sw_ring);
+ rte_free(rxq);
+}
+
+static sfc_dp_rx_qstart_t sfc_ef10_rx_qstart;
+static int
+sfc_ef10_rx_qstart(struct sfc_dp_rxq *dp_rxq, unsigned int evq_read_ptr)
+{
+ struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
+
+ rxq->prepared = 0;
+ rxq->completed = rxq->added = 0;
+
+ sfc_ef10_rx_qrefill(rxq);
+
+ rxq->evq_read_ptr = evq_read_ptr;
+
+ rxq->flags |= SFC_EF10_RXQ_STARTED;
+ rxq->flags &= ~(SFC_EF10_RXQ_NOT_RUNNING | SFC_EF10_RXQ_EXCEPTION);
+
+ return 0;
+}
+
+static sfc_dp_rx_qstop_t sfc_ef10_rx_qstop;
+static void
+sfc_ef10_rx_qstop(struct sfc_dp_rxq *dp_rxq, unsigned int *evq_read_ptr)
+{
+ struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
+
+ rxq->flags |= SFC_EF10_RXQ_NOT_RUNNING;
+
+ *evq_read_ptr = rxq->evq_read_ptr;
+}
+
+static sfc_dp_rx_qrx_ev_t sfc_ef10_rx_qrx_ev;
+static bool
+sfc_ef10_rx_qrx_ev(struct sfc_dp_rxq *dp_rxq, __rte_unused unsigned int id)
+{
+ __rte_unused struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
+
+ SFC_ASSERT(rxq->flags & SFC_EF10_RXQ_NOT_RUNNING);
+
+ /*
+ * It is safe to ignore Rx event since we free all mbufs on
+ * queue purge anyway.
+ */
+
+ return false;
+}
+
+static sfc_dp_rx_qpurge_t sfc_ef10_rx_qpurge;
+static void
+sfc_ef10_rx_qpurge(struct sfc_dp_rxq *dp_rxq)
+{
+ struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
+ unsigned int i;
+ struct sfc_ef10_rx_sw_desc *rxd;
+
+ for (i = rxq->completed; i != rxq->added; ++i) {
+ rxd = &rxq->sw_ring[i & rxq->ptr_mask];
+ rte_mempool_put(rxq->refill_mb_pool, rxd->mbuf);
+ rxd->mbuf = NULL;
+ }
+
+ rxq->flags &= ~SFC_EF10_RXQ_STARTED;
+}
+
+struct sfc_dp_rx sfc_ef10_rx = {
+ .dp = {
+ .name = SFC_KVARG_DATAPATH_EF10,
+ .type = SFC_DP_RX,
+ .hw_fw_caps = SFC_DP_HW_FW_CAP_EF10,
+ },
+ .features = 0,
+ .qcreate = sfc_ef10_rx_qcreate,
+ .qdestroy = sfc_ef10_rx_qdestroy,
+ .qstart = sfc_ef10_rx_qstart,
+ .qstop = sfc_ef10_rx_qstop,
+ .qrx_ev = sfc_ef10_rx_qrx_ev,
+ .qpurge = sfc_ef10_rx_qpurge,
+ .supported_ptypes_get = sfc_ef10_supported_ptypes_get,
+ .qdesc_npending = sfc_ef10_rx_qdesc_npending,
+ .pkt_burst = sfc_ef10_recv_pkts,
+};
Code Review / deb_dpdk.git / blobdiff