1 /*- 2 * Copyright (c) 2008 Nathan Whitehorn 3 * Copyright (c) 2003 Peter Grehan 4 * All rights reserved 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 /* 31 * Number of transmit/receive DBDMA descriptors. 32 * XXX allow override with a tuneable ? 33 */ 34 #define BM_MAX_DMA_COMMANDS 256 35 #define BM_NTXSEGS 16 36 37 #define BM_MAX_TX_PACKETS 100 38 #define BM_MAX_RX_PACKETS 100 39 40 /* 41 * Mutex macros 42 */ 43 #define BM_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 44 #define BM_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 45 46 /* 47 * software state for transmit job mbufs (may be elements of mbuf chains) 48 */ 49 struct bm_txsoft { 50 struct mbuf *txs_mbuf; /* head of our mbuf chain */ 51 bus_dmamap_t txs_dmamap; /* our DMA map */ 52 int txs_firstdesc; /* first descriptor in packet */ 53 int txs_lastdesc; /* last descriptor in packet */ 54 int txs_stopdesc; /* the location of the closing STOP */ 55 56 int txs_ndescs; /* number of descriptors */ 57 STAILQ_ENTRY(bm_txsoft) txs_q; 58 }; 59 60 STAILQ_HEAD(bm_txsq, bm_txsoft); 61 62 /* 63 * software state for receive jobs 64 */ 65 struct bm_rxsoft { 66 struct mbuf *rxs_mbuf; /* head of our mbuf chain */ 67 bus_dmamap_t rxs_dmamap; /* our DMA map */ 68 69 int dbdma_slot; 70 bus_dma_segment_t segment; 71 }; 72 73 struct bm_softc { 74 struct ifnet *sc_ifp; 75 struct mtx sc_mtx; 76 u_char sc_enaddr[ETHER_ADDR_LEN]; 77 78 int sc_streaming; 79 int sc_ifpflags; 80 int sc_duplex; 81 int sc_wdog_timer; 82 83 struct callout sc_tick_ch; 84 85 device_t sc_dev; /* back ptr to dev */ 86 struct resource *sc_memr; /* macio bus mem resource */ 87 int sc_memrid; 88 device_t sc_miibus; 89 90 struct mii_data *sc_mii; 91 92 struct resource *sc_txdmar, *sc_rxdmar; 93 int sc_txdmarid, sc_rxdmarid; 94 95 struct resource *sc_txdmairq, *sc_rxdmairq; 96 void *sc_txihtx, *sc_rxih; 97 int sc_txdmairqid, sc_rxdmairqid; 98 99 bus_dma_tag_t sc_pdma_tag; 100 101 bus_dma_tag_t sc_tdma_tag; 102 struct bm_txsoft sc_txsoft[BM_MAX_TX_PACKETS]; 103 int first_used_txdma_slot, next_txdma_slot; 104 105 struct bm_txsq sc_txfreeq; 106 struct bm_txsq sc_txdirtyq; 107 108 bus_dma_tag_t sc_rdma_tag; 109 struct bm_rxsoft sc_rxsoft[BM_MAX_TX_PACKETS]; 110 int next_rxdma_slot, rxdma_loop_slot; 111 112 dbdma_channel_t *sc_txdma, *sc_rxdma; 113 }; 114