From b63264c8342e6a1b6971c79550d2af2024b6a4de Mon Sep 17 00:00:00 2001 From: Luca Boccassi Date: Tue, 14 Aug 2018 18:52:30 +0100 Subject: New upstream version 18.08 Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a Signed-off-by: Luca Boccassi --- drivers/net/sfc/sfc_ef10_essb_rx.c | 723 +++++++++++++++++++++++++++++++++++++ 1 file changed, 723 insertions(+) create mode 100644 drivers/net/sfc/sfc_ef10_essb_rx.c (limited to 'drivers/net/sfc/sfc_ef10_essb_rx.c') diff --git a/drivers/net/sfc/sfc_ef10_essb_rx.c b/drivers/net/sfc/sfc_ef10_essb_rx.c new file mode 100644 index 00000000..81c8f7fb --- /dev/null +++ b/drivers/net/sfc/sfc_ef10_essb_rx.c @@ -0,0 +1,723 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2017-2018 Solarflare Communications Inc. + * All rights reserved. + * + * This software was jointly developed between OKTET Labs (under contract + * for Solarflare) and Solarflare Communications, Inc. + */ + +/* EF10 equal stride packed stream receive native datapath implementation */ + +#include + +#include +#include +#include +#include + +#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" + +/* Tunnels are not supported */ +#define SFC_EF10_RX_EV_ENCAP_SUPPORT 0 +#include "sfc_ef10_rx_ev.h" + +#define sfc_ef10_essb_rx_err(dpq, ...) \ + SFC_DP_LOG(SFC_KVARG_DATAPATH_EF10_ESSB, ERR, dpq, __VA_ARGS__) + +#define sfc_ef10_essb_rx_info(dpq, ...) \ + SFC_DP_LOG(SFC_KVARG_DATAPATH_EF10_ESSB, INFO, dpq, __VA_ARGS__) + +/* + * Fake length for RXQ descriptors in equal stride super-buffer mode + * to make hardware happy. + */ +#define SFC_EF10_ESSB_RX_FAKE_BUF_SIZE 32 + +/** + * Minimum number of Rx buffers the datapath allows to use. + * + * Each HW Rx descriptor has many Rx buffers. The number of buffers + * in one HW Rx descriptor is equal to size of contiguous block + * provided by Rx buffers memory pool. The contiguous block size + * depends on CONFIG_RTE_DRIVER_MEMPOOL_BUCKET_SIZE_KB and rte_mbuf + * data size specified on the memory pool creation. Typical rte_mbuf + * data size is about 2k which makes a bit less than 32 buffers in + * contiguous block with default bucket size equal to 64k. + * Since HW Rx descriptors are pushed by 8 (see SFC_EF10_RX_WPTR_ALIGN), + * it makes about 256 as required minimum. Double it in advertised + * minimum to allow for at least 2 refill blocks. + */ +#define SFC_EF10_ESSB_RX_DESCS_MIN 512 + +/** + * Number of Rx buffers should be aligned to. + * + * There are no extra requirements on alignment since actual number of + * pushed Rx buffers will be multiple by contiguous block size which + * is unknown beforehand. + */ +#define SFC_EF10_ESSB_RX_DESCS_ALIGN 1 + +/** + * Maximum number of descriptors/buffers in the Rx ring. + * It should guarantee that corresponding event queue never overfill. + */ +#define SFC_EF10_ESSB_RXQ_LIMIT(_nevs) \ + ((_nevs) - 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_essb_rx_sw_desc { + struct rte_mbuf *first_mbuf; +}; + +struct sfc_ef10_essb_rxq { + /* Used on data path */ + unsigned int flags; +#define SFC_EF10_ESSB_RXQ_STARTED 0x1 +#define SFC_EF10_ESSB_RXQ_NOT_RUNNING 0x2 +#define SFC_EF10_ESSB_RXQ_EXCEPTION 0x4 + unsigned int rxq_ptr_mask; + unsigned int block_size; + unsigned int buf_stride; + unsigned int bufs_ptr; + unsigned int completed; + unsigned int pending_id; + unsigned int bufs_pending; + unsigned int left_in_completed; + unsigned int left_in_pending; + unsigned int evq_read_ptr; + unsigned int evq_ptr_mask; + efx_qword_t *evq_hw_ring; + struct sfc_ef10_essb_rx_sw_desc *sw_ring; + uint16_t port_id; + + /* Used on refill */ + unsigned int added; + unsigned int max_fill_level; + 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_essb_rxq * +sfc_ef10_essb_rxq_by_dp_rxq(struct sfc_dp_rxq *dp_rxq) +{ + return container_of(dp_rxq, struct sfc_ef10_essb_rxq, dp); +} + +static struct rte_mbuf * +sfc_ef10_essb_next_mbuf(const struct sfc_ef10_essb_rxq *rxq, + struct rte_mbuf *mbuf) +{ + return (struct rte_mbuf *)((uintptr_t)mbuf + rxq->buf_stride); +} + +static struct rte_mbuf * +sfc_ef10_essb_mbuf_by_index(const struct sfc_ef10_essb_rxq *rxq, + struct rte_mbuf *mbuf, unsigned int idx) +{ + return (struct rte_mbuf *)((uintptr_t)mbuf + idx * rxq->buf_stride); +} + +static struct rte_mbuf * +sfc_ef10_essb_maybe_next_completed(struct sfc_ef10_essb_rxq *rxq) +{ + const struct sfc_ef10_essb_rx_sw_desc *rxd; + + if (rxq->left_in_completed != 0) { + rxd = &rxq->sw_ring[rxq->completed & rxq->rxq_ptr_mask]; + return sfc_ef10_essb_mbuf_by_index(rxq, rxd->first_mbuf, + rxq->block_size - rxq->left_in_completed); + } else { + rxq->completed++; + rxd = &rxq->sw_ring[rxq->completed & rxq->rxq_ptr_mask]; + rxq->left_in_completed = rxq->block_size; + return rxd->first_mbuf; + } +} + +static void +sfc_ef10_essb_rx_qrefill(struct sfc_ef10_essb_rxq *rxq) +{ + const unsigned int rxq_ptr_mask = rxq->rxq_ptr_mask; + unsigned int free_space; + unsigned int bulks; + void *mbuf_blocks[SFC_EF10_RX_WPTR_ALIGN]; + unsigned int added = rxq->added; + + free_space = rxq->max_fill_level - (added - rxq->completed); + + if (free_space < rxq->refill_threshold) + return; + + bulks = free_space / RTE_DIM(mbuf_blocks); + /* refill_threshold guarantees that bulks is positive */ + SFC_ASSERT(bulks > 0); + + do { + unsigned int id; + unsigned int i; + + if (unlikely(rte_mempool_get_contig_blocks(rxq->refill_mb_pool, + mbuf_blocks, RTE_DIM(mbuf_blocks)) < 0)) { + struct rte_eth_dev_data *dev_data = + rte_eth_devices[rxq->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(mbuf_blocks); + /* Return if we have posted nothing yet */ + if (added == rxq->added) + return; + /* Push posted */ + break; + } + + for (i = 0, id = added & rxq_ptr_mask; + i < RTE_DIM(mbuf_blocks); + ++i, ++id) { + struct rte_mbuf *m = mbuf_blocks[i]; + struct sfc_ef10_essb_rx_sw_desc *rxd; + + SFC_ASSERT((id & ~rxq_ptr_mask) == 0); + rxd = &rxq->sw_ring[id]; + rxd->first_mbuf = m; + + /* RX_KER_BYTE_CNT is ignored by firmware */ + EFX_POPULATE_QWORD_2(rxq->rxq_hw_ring[id], + ESF_DZ_RX_KER_BYTE_CNT, + SFC_EF10_ESSB_RX_FAKE_BUF_SIZE, + ESF_DZ_RX_KER_BUF_ADDR, + rte_mbuf_data_iova_default(m)); + } + + added += RTE_DIM(mbuf_blocks); + + } while (--bulks > 0); + + SFC_ASSERT(rxq->added != added); + rxq->added = added; + sfc_ef10_rx_qpush(rxq->doorbell, added, rxq_ptr_mask); +} + +static bool +sfc_ef10_essb_rx_event_get(struct sfc_ef10_essb_rxq *rxq, efx_qword_t *rx_ev) +{ + *rx_ev = rxq->evq_hw_ring[rxq->evq_read_ptr & rxq->evq_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 + */ + rxq->flags |= SFC_EF10_ESSB_RXQ_EXCEPTION; + sfc_ef10_essb_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 void +sfc_ef10_essb_rx_process_ev(struct sfc_ef10_essb_rxq *rxq, efx_qword_t rx_ev) +{ + unsigned int ready; + + ready = (EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_DSC_PTR_LBITS) - + rxq->bufs_ptr) & + EFX_MASK32(ESF_DZ_RX_DSC_PTR_LBITS); + + rxq->bufs_ptr += ready; + rxq->bufs_pending += ready; + + SFC_ASSERT(ready > 0); + do { + const struct sfc_ef10_essb_rx_sw_desc *rxd; + struct rte_mbuf *m; + unsigned int todo_bufs; + struct rte_mbuf *m0; + + rxd = &rxq->sw_ring[rxq->pending_id]; + m = sfc_ef10_essb_mbuf_by_index(rxq, rxd->first_mbuf, + rxq->block_size - rxq->left_in_pending); + + if (ready < rxq->left_in_pending) { + todo_bufs = ready; + ready = 0; + rxq->left_in_pending -= todo_bufs; + } else { + todo_bufs = rxq->left_in_pending; + ready -= todo_bufs; + rxq->left_in_pending = rxq->block_size; + if (rxq->pending_id != rxq->rxq_ptr_mask) + rxq->pending_id++; + else + rxq->pending_id = 0; + } + + SFC_ASSERT(todo_bufs > 0); + --todo_bufs; + + sfc_ef10_rx_ev_to_offloads(rx_ev, m, ~0ull); + + /* Prefetch pseudo-header */ + rte_prefetch0((uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM); + + m0 = m; + while (todo_bufs-- > 0) { + m = sfc_ef10_essb_next_mbuf(rxq, m); + m->ol_flags = m0->ol_flags; + m->packet_type = m0->packet_type; + /* Prefetch pseudo-header */ + rte_prefetch0((uint8_t *)m->buf_addr + + RTE_PKTMBUF_HEADROOM); + } + } while (ready > 0); +} + +static unsigned int +sfc_ef10_essb_rx_get_pending(struct sfc_ef10_essb_rxq *rxq, + struct rte_mbuf **rx_pkts, uint16_t nb_pkts) +{ + unsigned int n_rx_pkts = 0; + unsigned int todo_bufs; + struct rte_mbuf *m; + + while ((todo_bufs = RTE_MIN(nb_pkts - n_rx_pkts, + rxq->bufs_pending)) > 0) { + m = sfc_ef10_essb_maybe_next_completed(rxq); + + todo_bufs = RTE_MIN(todo_bufs, rxq->left_in_completed); + + rxq->bufs_pending -= todo_bufs; + rxq->left_in_completed -= todo_bufs; + + SFC_ASSERT(todo_bufs > 0); + todo_bufs--; + + do { + const efx_qword_t *qwordp; + uint16_t pkt_len; + + /* Buffers to be discarded have 0 in packet type */ + if (unlikely(m->packet_type == 0)) { + rte_mempool_put(rxq->refill_mb_pool, m); + goto next_buf; + } + + rx_pkts[n_rx_pkts++] = m; + + /* Parse pseudo-header */ + qwordp = (const efx_qword_t *) + ((uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM); + pkt_len = + EFX_QWORD_FIELD(*qwordp, + ES_EZ_ESSB_RX_PREFIX_DATA_LEN); + + m->data_off = RTE_PKTMBUF_HEADROOM + + ES_EZ_ESSB_RX_PREFIX_LEN; + m->port = rxq->port_id; + + rte_pktmbuf_pkt_len(m) = pkt_len; + rte_pktmbuf_data_len(m) = pkt_len; + + m->ol_flags |= + (PKT_RX_RSS_HASH * + !!EFX_TEST_QWORD_BIT(*qwordp, + ES_EZ_ESSB_RX_PREFIX_HASH_VALID_LBN)) | + (PKT_RX_FDIR_ID * + !!EFX_TEST_QWORD_BIT(*qwordp, + ES_EZ_ESSB_RX_PREFIX_MARK_VALID_LBN)) | + (PKT_RX_FDIR * + !!EFX_TEST_QWORD_BIT(*qwordp, + ES_EZ_ESSB_RX_PREFIX_MATCH_FLAG_LBN)); + + /* EFX_QWORD_FIELD converts little-endian to CPU */ + m->hash.rss = + EFX_QWORD_FIELD(*qwordp, + ES_EZ_ESSB_RX_PREFIX_HASH); + m->hash.fdir.hi = + EFX_QWORD_FIELD(*qwordp, + ES_EZ_ESSB_RX_PREFIX_MARK); + +next_buf: + m = sfc_ef10_essb_next_mbuf(rxq, m); + } while (todo_bufs-- > 0); + } + + return n_rx_pkts; +} + + +static uint16_t +sfc_ef10_essb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(rx_queue); + const unsigned int evq_old_read_ptr = rxq->evq_read_ptr; + uint16_t n_rx_pkts; + efx_qword_t rx_ev; + + if (unlikely(rxq->flags & (SFC_EF10_ESSB_RXQ_NOT_RUNNING | + SFC_EF10_ESSB_RXQ_EXCEPTION))) + return 0; + + n_rx_pkts = sfc_ef10_essb_rx_get_pending(rxq, rx_pkts, nb_pkts); + + while (n_rx_pkts != nb_pkts && + sfc_ef10_essb_rx_event_get(rxq, &rx_ev)) { + /* + * DROP_EVENT is an internal to the NIC, software should + * never see it and, therefore, may ignore it. + */ + + sfc_ef10_essb_rx_process_ev(rxq, rx_ev); + n_rx_pkts += sfc_ef10_essb_rx_get_pending(rxq, + rx_pkts + n_rx_pkts, + nb_pkts - n_rx_pkts); + } + + sfc_ef10_ev_qclear(rxq->evq_hw_ring, rxq->evq_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_essb_rx_qrefill(rxq); + + return n_rx_pkts; +} + +static sfc_dp_rx_qdesc_npending_t sfc_ef10_essb_rx_qdesc_npending; +static unsigned int +sfc_ef10_essb_rx_qdesc_npending(struct sfc_dp_rxq *dp_rxq) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + const unsigned int evq_old_read_ptr = rxq->evq_read_ptr; + efx_qword_t rx_ev; + + if (unlikely(rxq->flags & (SFC_EF10_ESSB_RXQ_NOT_RUNNING | + SFC_EF10_ESSB_RXQ_EXCEPTION))) + return rxq->bufs_pending; + + while (sfc_ef10_essb_rx_event_get(rxq, &rx_ev)) { + /* + * DROP_EVENT is an internal to the NIC, software should + * never see it and, therefore, may ignore it. + */ + sfc_ef10_essb_rx_process_ev(rxq, rx_ev); + } + + sfc_ef10_ev_qclear(rxq->evq_hw_ring, rxq->evq_ptr_mask, + evq_old_read_ptr, rxq->evq_read_ptr); + + return rxq->bufs_pending; +} + +static sfc_dp_rx_qdesc_status_t sfc_ef10_essb_rx_qdesc_status; +static int +sfc_ef10_essb_rx_qdesc_status(struct sfc_dp_rxq *dp_rxq, uint16_t offset) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + unsigned int pending = sfc_ef10_essb_rx_qdesc_npending(dp_rxq); + + if (offset < pending) + return RTE_ETH_RX_DESC_DONE; + + if (offset < (rxq->added - rxq->completed) * rxq->block_size + + rxq->left_in_completed - rxq->block_size) + return RTE_ETH_RX_DESC_AVAIL; + + return RTE_ETH_RX_DESC_UNAVAIL; +} + +static sfc_dp_rx_get_dev_info_t sfc_ef10_essb_rx_get_dev_info; +static void +sfc_ef10_essb_rx_get_dev_info(struct rte_eth_dev_info *dev_info) +{ + /* + * Number of descriptors just defines maximum number of pushed + * descriptors (fill level). + */ + dev_info->rx_desc_lim.nb_min = SFC_EF10_ESSB_RX_DESCS_MIN; + dev_info->rx_desc_lim.nb_align = SFC_EF10_ESSB_RX_DESCS_ALIGN; +} + +static sfc_dp_rx_pool_ops_supported_t sfc_ef10_essb_rx_pool_ops_supported; +static int +sfc_ef10_essb_rx_pool_ops_supported(const char *pool) +{ + SFC_ASSERT(pool != NULL); + + if (strcmp(pool, "bucket") == 0) + return 0; + + return -ENOTSUP; +} + +static sfc_dp_rx_qsize_up_rings_t sfc_ef10_essb_rx_qsize_up_rings; +static int +sfc_ef10_essb_rx_qsize_up_rings(uint16_t nb_rx_desc, + struct rte_mempool *mb_pool, + unsigned int *rxq_entries, + unsigned int *evq_entries, + unsigned int *rxq_max_fill_level) +{ + int rc; + struct rte_mempool_info mp_info; + unsigned int nb_hw_rx_desc; + unsigned int max_events; + + rc = rte_mempool_ops_get_info(mb_pool, &mp_info); + if (rc != 0) + return -rc; + if (mp_info.contig_block_size == 0) + return EINVAL; + + /* + * Calculate required number of hardware Rx descriptors each + * carrying contig block size Rx buffers. + * It cannot be less than Rx write pointer alignment plus 1 + * in order to avoid cases when the ring is guaranteed to be + * empty. + */ + nb_hw_rx_desc = RTE_MAX(SFC_DIV_ROUND_UP(nb_rx_desc, + mp_info.contig_block_size), + SFC_EF10_RX_WPTR_ALIGN + 1); + if (nb_hw_rx_desc <= EFX_RXQ_MINNDESCS) { + *rxq_entries = EFX_RXQ_MINNDESCS; + } else { + *rxq_entries = rte_align32pow2(nb_hw_rx_desc); + if (*rxq_entries > EFX_RXQ_MAXNDESCS) + return EINVAL; + } + + max_events = RTE_ALIGN_FLOOR(nb_hw_rx_desc, SFC_EF10_RX_WPTR_ALIGN) * + mp_info.contig_block_size + + (SFC_EF10_EV_PER_CACHE_LINE - 1) /* max unused EvQ entries */ + + 1 /* Rx error */ + 1 /* flush */ + 1 /* head-tail space */; + + *evq_entries = rte_align32pow2(max_events); + *evq_entries = RTE_MAX(*evq_entries, (unsigned int)EFX_EVQ_MINNEVS); + *evq_entries = RTE_MIN(*evq_entries, (unsigned int)EFX_EVQ_MAXNEVS); + + /* + * May be even maximum event queue size is insufficient to handle + * so many Rx descriptors. If so, we should limit Rx queue fill level. + */ + *rxq_max_fill_level = RTE_MIN(nb_rx_desc, + SFC_EF10_ESSB_RXQ_LIMIT(*evq_entries)); + return 0; +} + +static sfc_dp_rx_qcreate_t sfc_ef10_essb_rx_qcreate; +static int +sfc_ef10_essb_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 rte_mempool * const mp = info->refill_mb_pool; + struct rte_mempool_info mp_info; + struct sfc_ef10_essb_rxq *rxq; + int rc; + + rc = rte_mempool_ops_get_info(mp, &mp_info); + if (rc != 0) { + /* Positive errno is used in the driver */ + rc = -rc; + goto fail_get_contig_block_size; + } + + /* Check if the mempool provides block dequeue */ + rc = EINVAL; + if (mp_info.contig_block_size == 0) + goto fail_no_block_dequeue; + + 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->block_size = mp_info.contig_block_size; + rxq->buf_stride = mp->header_size + mp->elt_size + mp->trailer_size; + rxq->rxq_ptr_mask = info->rxq_entries - 1; + rxq->evq_ptr_mask = info->evq_entries - 1; + rxq->evq_hw_ring = info->evq_hw_ring; + rxq->port_id = port_id; + + rxq->max_fill_level = info->max_fill_level / mp_info.contig_block_size; + rxq->refill_threshold = + RTE_MAX(info->refill_threshold / mp_info.contig_block_size, + SFC_EF10_RX_WPTR_ALIGN); + rxq->refill_mb_pool = mp; + 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 << info->vi_window_shift); + + sfc_ef10_essb_rx_info(&rxq->dp.dpq, + "block size is %u, buf stride is %u", + rxq->block_size, rxq->buf_stride); + sfc_ef10_essb_rx_info(&rxq->dp.dpq, + "max fill level is %u descs (%u bufs), " + "refill threashold %u descs (%u bufs)", + rxq->max_fill_level, + rxq->max_fill_level * rxq->block_size, + rxq->refill_threshold, + rxq->refill_threshold * rxq->block_size); + + *dp_rxqp = &rxq->dp; + return 0; + +fail_desc_alloc: + rte_free(rxq); + +fail_rxq_alloc: +fail_no_block_dequeue: +fail_get_contig_block_size: + return rc; +} + +static sfc_dp_rx_qdestroy_t sfc_ef10_essb_rx_qdestroy; +static void +sfc_ef10_essb_rx_qdestroy(struct sfc_dp_rxq *dp_rxq) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + + rte_free(rxq->sw_ring); + rte_free(rxq); +} + +static sfc_dp_rx_qstart_t sfc_ef10_essb_rx_qstart; +static int +sfc_ef10_essb_rx_qstart(struct sfc_dp_rxq *dp_rxq, unsigned int evq_read_ptr) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + + rxq->evq_read_ptr = evq_read_ptr; + + /* Initialize before refill */ + rxq->completed = rxq->pending_id = rxq->added = 0; + rxq->left_in_completed = rxq->left_in_pending = rxq->block_size; + rxq->bufs_ptr = UINT_MAX; + rxq->bufs_pending = 0; + + sfc_ef10_essb_rx_qrefill(rxq); + + rxq->flags |= SFC_EF10_ESSB_RXQ_STARTED; + rxq->flags &= + ~(SFC_EF10_ESSB_RXQ_NOT_RUNNING | SFC_EF10_ESSB_RXQ_EXCEPTION); + + return 0; +} + +static sfc_dp_rx_qstop_t sfc_ef10_essb_rx_qstop; +static void +sfc_ef10_essb_rx_qstop(struct sfc_dp_rxq *dp_rxq, unsigned int *evq_read_ptr) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + + rxq->flags |= SFC_EF10_ESSB_RXQ_NOT_RUNNING; + + *evq_read_ptr = rxq->evq_read_ptr; +} + +static sfc_dp_rx_qrx_ev_t sfc_ef10_essb_rx_qrx_ev; +static bool +sfc_ef10_essb_rx_qrx_ev(struct sfc_dp_rxq *dp_rxq, __rte_unused unsigned int id) +{ + __rte_unused struct sfc_ef10_essb_rxq *rxq; + + rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + SFC_ASSERT(rxq->flags & SFC_EF10_ESSB_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_essb_rx_qpurge; +static void +sfc_ef10_essb_rx_qpurge(struct sfc_dp_rxq *dp_rxq) +{ + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + unsigned int i; + const struct sfc_ef10_essb_rx_sw_desc *rxd; + struct rte_mbuf *m; + + for (i = rxq->completed; i != rxq->added; ++i) { + rxd = &rxq->sw_ring[i & rxq->rxq_ptr_mask]; + m = sfc_ef10_essb_mbuf_by_index(rxq, rxd->first_mbuf, + rxq->block_size - rxq->left_in_completed); + while (rxq->left_in_completed > 0) { + rte_mempool_put(rxq->refill_mb_pool, m); + m = sfc_ef10_essb_next_mbuf(rxq, m); + rxq->left_in_completed--; + } + rxq->left_in_completed = rxq->block_size; + } + + rxq->flags &= ~SFC_EF10_ESSB_RXQ_STARTED; +} + +struct sfc_dp_rx sfc_ef10_essb_rx = { + .dp = { + .name = SFC_KVARG_DATAPATH_EF10_ESSB, + .type = SFC_DP_RX, + .hw_fw_caps = SFC_DP_HW_FW_CAP_EF10 | + SFC_DP_HW_FW_CAP_RX_ES_SUPER_BUFFER, + }, + .features = SFC_DP_RX_FEAT_FLOW_FLAG | + SFC_DP_RX_FEAT_FLOW_MARK | + SFC_DP_RX_FEAT_CHECKSUM, + .get_dev_info = sfc_ef10_essb_rx_get_dev_info, + .pool_ops_supported = sfc_ef10_essb_rx_pool_ops_supported, + .qsize_up_rings = sfc_ef10_essb_rx_qsize_up_rings, + .qcreate = sfc_ef10_essb_rx_qcreate, + .qdestroy = sfc_ef10_essb_rx_qdestroy, + .qstart = sfc_ef10_essb_rx_qstart, + .qstop = sfc_ef10_essb_rx_qstop, + .qrx_ev = sfc_ef10_essb_rx_qrx_ev, + .qpurge = sfc_ef10_essb_rx_qpurge, + .supported_ptypes_get = sfc_ef10_supported_ptypes_get, + .qdesc_npending = sfc_ef10_essb_rx_qdesc_npending, + .qdesc_status = sfc_ef10_essb_rx_qdesc_status, + .pkt_burst = sfc_ef10_essb_recv_pkts, +}; -- cgit 1.2.3-korg