114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
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/*-
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* Copyright (c) 2008 Nathan Whitehorn
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* Copyright (c) 2003 Peter Grehan
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* All rights reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Number of transmit/receive DBDMA descriptors.
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* XXX allow override with a tuneable ?
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*/
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#define BM_MAX_DMA_COMMANDS 256
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#define BM_NTXSEGS 16
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#define BM_MAX_TX_PACKETS 100
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#define BM_MAX_RX_PACKETS 100
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/*
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* Mutex macros
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*/
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#define BM_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define BM_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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/*
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* software state for transmit job mbufs (may be elements of mbuf chains)
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*/
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struct bm_txsoft {
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struct mbuf *txs_mbuf; /* head of our mbuf chain */
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bus_dmamap_t txs_dmamap; /* our DMA map */
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int txs_firstdesc; /* first descriptor in packet */
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int txs_lastdesc; /* last descriptor in packet */
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int txs_stopdesc; /* the location of the closing STOP */
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int txs_ndescs; /* number of descriptors */
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STAILQ_ENTRY(bm_txsoft) txs_q;
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};
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STAILQ_HEAD(bm_txsq, bm_txsoft);
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/*
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* software state for receive jobs
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*/
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struct bm_rxsoft {
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struct mbuf *rxs_mbuf; /* head of our mbuf chain */
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bus_dmamap_t rxs_dmamap; /* our DMA map */
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int dbdma_slot;
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bus_dma_segment_t segment;
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};
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struct bm_softc {
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struct ifnet *sc_ifp;
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struct mtx sc_mtx;
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u_char sc_enaddr[ETHER_ADDR_LEN];
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int sc_streaming;
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int sc_ifpflags;
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int sc_duplex;
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int sc_wdog_timer;
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struct callout sc_tick_ch;
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device_t sc_dev; /* back ptr to dev */
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struct resource *sc_memr; /* macio bus mem resource */
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int sc_memrid;
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device_t sc_miibus;
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struct mii_data *sc_mii;
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struct resource *sc_txdmar, *sc_rxdmar;
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int sc_txdmarid, sc_rxdmarid;
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struct resource *sc_txdmairq, *sc_rxdmairq;
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void *sc_txihtx, *sc_rxih;
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int sc_txdmairqid, sc_rxdmairqid;
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bus_dma_tag_t sc_pdma_tag;
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bus_dma_tag_t sc_tdma_tag;
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struct bm_txsoft sc_txsoft[BM_MAX_TX_PACKETS];
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int first_used_txdma_slot, next_txdma_slot;
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struct bm_txsq sc_txfreeq;
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struct bm_txsq sc_txdirtyq;
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bus_dma_tag_t sc_rdma_tag;
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struct bm_rxsoft sc_rxsoft[BM_MAX_TX_PACKETS];
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int next_rxdma_slot, rxdma_loop_slot;
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dbdma_channel_t *sc_txdma, *sc_rxdma;
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};
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