if_bmvar.h revision 331722 
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: stable/11/sys/dev/bm/if_bmvar.h 331722 2018-03-29 02:50:57Z eadler $
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 */
49struct 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
60STAILQ_HEAD(bm_txsq, bm_txsoft);
61
62/*
63 * software state for receive jobs
64 */
65struct 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
73struct 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