ena.c (3cfadb28c3f6f21cb937f7331bfa066c0edda29c) ena.c (4727bda6f2e975a24ba6ec7a7a77cf73bf169edb)
1/*-
2 * BSD LICENSE
3 *
4 * Copyright (c) 2015-2017 Amazon.com, Inc. or its affiliates.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

--- 535 unchanged lines hidden (view full) ---

544
545 /* Create DMA tag for Rx buffers*/
546 ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev), /* parent */
547 1, 0, /* alignment, bounds */
548 ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr of excl window */
549 BUS_SPACE_MAXADDR, /* highaddr of excl window */
550 NULL, NULL, /* filter, filterarg */
551 MJUM16BYTES, /* maxsize */
1/*-
2 * BSD LICENSE
3 *
4 * Copyright (c) 2015-2017 Amazon.com, Inc. or its affiliates.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

--- 535 unchanged lines hidden (view full) ---

544
545 /* Create DMA tag for Rx buffers*/
546 ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev), /* parent */
547 1, 0, /* alignment, bounds */
548 ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr of excl window */
549 BUS_SPACE_MAXADDR, /* highaddr of excl window */
550 NULL, NULL, /* filter, filterarg */
551 MJUM16BYTES, /* maxsize */
552 1, /* nsegments */
552 adapter->max_rx_sgl_size, /* nsegments */
553 MJUM16BYTES, /* maxsegsize */
554 0, /* flags */
555 NULL, /* lockfunc */
556 NULL, /* lockarg */
557 &adapter->rx_buf_tag);
558
559 return (ret);
560}

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945
946static inline int
947ena_alloc_rx_mbuf(struct ena_adapter *adapter,
948 struct ena_ring *rx_ring, struct ena_rx_buffer *rx_info)
949{
950 struct ena_com_buf *ena_buf;
951 bus_dma_segment_t segs[1];
952 int nsegs, error;
553 MJUM16BYTES, /* maxsegsize */
554 0, /* flags */
555 NULL, /* lockfunc */
556 NULL, /* lockarg */
557 &adapter->rx_buf_tag);
558
559 return (ret);
560}

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945
946static inline int
947ena_alloc_rx_mbuf(struct ena_adapter *adapter,
948 struct ena_ring *rx_ring, struct ena_rx_buffer *rx_info)
949{
950 struct ena_com_buf *ena_buf;
951 bus_dma_segment_t segs[1];
952 int nsegs, error;
953 int mlen;
953
954 /* if previous allocated frag is not used */
955 if (unlikely(rx_info->mbuf != NULL))
956 return (0);
957
958 /* Get mbuf using UMA allocator */
959 rx_info->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUM16BYTES);
960
961 if (unlikely(rx_info->mbuf == NULL)) {
954
955 /* if previous allocated frag is not used */
956 if (unlikely(rx_info->mbuf != NULL))
957 return (0);
958
959 /* Get mbuf using UMA allocator */
960 rx_info->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUM16BYTES);
961
962 if (unlikely(rx_info->mbuf == NULL)) {
962 counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
963 return (ENOMEM);
963 counter_u64_add(rx_ring->rx_stats.mjum_alloc_fail, 1);
964 rx_info->mbuf = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
965 if (unlikely(rx_info->mbuf == NULL)) {
966 counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
967 return (ENOMEM);
968 }
969 mlen = MCLBYTES;
970 } else {
971 mlen = MJUM16BYTES;
964 }
965 /* Set mbuf length*/
972 }
973 /* Set mbuf length*/
966 rx_info->mbuf->m_pkthdr.len = rx_info->mbuf->m_len = MJUM16BYTES;
974 rx_info->mbuf->m_pkthdr.len = rx_info->mbuf->m_len = mlen;
967
968 /* Map packets for DMA */
969 ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
970 "Using tag %p for buffers' DMA mapping, mbuf %p len: %d",
971 adapter->rx_buf_tag,rx_info->mbuf, rx_info->mbuf->m_len);
972 error = bus_dmamap_load_mbuf_sg(adapter->rx_buf_tag, rx_info->map,
973 rx_info->mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
974 if (unlikely((error != 0) || (nsegs != 1))) {
975 ena_trace(ENA_WARNING, "failed to map mbuf, error: %d, "
976 "nsegs: %d\n", error, nsegs);
977 counter_u64_add(rx_ring->rx_stats.dma_mapping_err, 1);
978 goto exit;
979
980 }
981
982 bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map, BUS_DMASYNC_PREREAD);
983
984 ena_buf = &rx_info->ena_buf;
985 ena_buf->paddr = segs[0].ds_addr;
975
976 /* Map packets for DMA */
977 ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
978 "Using tag %p for buffers' DMA mapping, mbuf %p len: %d",
979 adapter->rx_buf_tag,rx_info->mbuf, rx_info->mbuf->m_len);
980 error = bus_dmamap_load_mbuf_sg(adapter->rx_buf_tag, rx_info->map,
981 rx_info->mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
982 if (unlikely((error != 0) || (nsegs != 1))) {
983 ena_trace(ENA_WARNING, "failed to map mbuf, error: %d, "
984 "nsegs: %d\n", error, nsegs);
985 counter_u64_add(rx_ring->rx_stats.dma_mapping_err, 1);
986 goto exit;
987
988 }
989
990 bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map, BUS_DMASYNC_PREREAD);
991
992 ena_buf = &rx_info->ena_buf;
993 ena_buf->paddr = segs[0].ds_addr;
986 ena_buf->len = MJUM16BYTES;
994 ena_buf->len = mlen;
987
988 ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
989 "ALLOC RX BUF: mbuf %p, rx_info %p, len %d, paddr %#jx\n",
990 rx_info->mbuf, rx_info,ena_buf->len, (uintmax_t)ena_buf->paddr);
991
992 return (0);
993
994exit:

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996 ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
997 "ALLOC RX BUF: mbuf %p, rx_info %p, len %d, paddr %#jx\n",
998 rx_info->mbuf, rx_info,ena_buf->len, (uintmax_t)ena_buf->paddr);
999
1000 return (0);
1001
1002exit:

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