2 * Copyright (c) 2008 Nathan Whitehorn
3 * Copyright (c) 2003 Peter Grehan
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
31 * Number of transmit/receive DBDMA descriptors.
32 * XXX allow override with a tuneable ?
34 #define BM_MAX_DMA_COMMANDS 256
37 #define BM_MAX_TX_PACKETS 100
38 #define BM_MAX_RX_PACKETS 100
43 #define BM_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
44 #define BM_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
47 * software state for transmit job mbufs (may be elements of mbuf chains)
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 */
56 int txs_ndescs; /* number of descriptors */
57 STAILQ_ENTRY(bm_txsoft) txs_q;
60 STAILQ_HEAD(bm_txsq, bm_txsoft);
63 * software state for receive jobs
66 struct mbuf *rxs_mbuf; /* head of our mbuf chain */
67 bus_dmamap_t rxs_dmamap; /* our DMA map */
70 bus_dma_segment_t segment;
76 u_char sc_enaddr[ETHER_ADDR_LEN];
83 struct callout sc_tick_ch;
85 device_t sc_dev; /* back ptr to dev */
86 struct resource *sc_memr; /* macio bus mem resource */
90 struct mii_data *sc_mii;
92 struct resource *sc_txdmar, *sc_rxdmar;
93 int sc_txdmarid, sc_rxdmarid;
95 struct resource *sc_txdmairq, *sc_rxdmairq;
96 void *sc_txihtx, *sc_rxih;
97 int sc_txdmairqid, sc_rxdmairqid;
99 bus_dma_tag_t sc_pdma_tag;
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;
105 struct bm_txsq sc_txfreeq;
106 struct bm_txsq sc_txdirtyq;
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;
112 dbdma_channel_t *sc_txdma, *sc_rxdma;