1 /*-
2 * Copyright (c) 1999 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Paul Kranenburg.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the NetBSD
19 * Foundation, Inc. and its contributors.
20 * 4. Neither the name of The NetBSD Foundation nor the names of its
21 * contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 *
36 * from: NetBSD: hmevar.h,v 1.5 2000/06/25 01:10:04 eeh Exp
37 *
38 * $FreeBSD: releng/5.0/sys/dev/hme/if_hmevar.h 93043 2002-03-23 19:37:11Z tmm $
39 */
40
41 #include <sys/callout.h>
42
43 /*
44 * Number of receive and transmit descriptors. For each receive descriptor,
45 * an mbuf cluster is allocated and set up to receive a packet, and a dma map
46 * is created. Therefore, this number should not be too high to not waste
47 * memory.
48 * TX descriptors have less static cost (a dma map is allocated which could
49 * cause bounce buffers to be reserved; other that that, the only required
50 * memory is sizeof(struct hme_txdesc)).
51 */
52 #define HME_NRXDESC 128
53 #define HME_NTXDESC 64
54
55 /* Maximum size of a mapped RX buffer. */
56 #define HME_BUFSZ 1600
57
58 /*
59 * RX DMA descriptor. The descriptors are preallocated; the dma map is
60 * reused.
61 */
62 struct hme_rxdesc {
63 struct mbuf *hrx_m;
64 bus_dmamap_t hrx_dmamap;
65 int hrx_offs;
66 bus_size_t hrx_len;
67 };
68
69 struct hme_txdesc {
70 struct mbuf *htx_m;
71 bus_dmamap_t htx_dmamap;
72 int htx_flags;
73 };
74
75 /* Value for htx_flags */
76 #define HTXF_MAPPED 1
77
78 struct hme_ring {
79 /* Ring Descriptors */
80 caddr_t rb_membase; /* Packet buffer: CPU address */
81 bus_addr_t rb_dmabase; /* Packet buffer: DMA address */
82 caddr_t rb_txd; /* Transmit descriptors */
83 bus_addr_t rb_txddma; /* DMA address of same */
84 caddr_t rb_rxd; /* Receive descriptors */
85 bus_addr_t rb_rxddma; /* DMA address of same */
86
87 /* Ring Descriptor state */
88 int rb_tdhead, rb_tdtail;
89 int rb_rdtail;
90 int rb_td_nbusy;
91
92 /* Descriptors */
93 struct hme_rxdesc rb_rxdesc[HME_NRXDESC];
94 struct hme_txdesc rb_txdesc[HME_NTXDESC];
95
96 bus_dmamap_t rb_spare_dmamap;
97 };
98
99 struct hme_softc {
100 struct arpcom sc_arpcom;
101 struct ifmedia sc_ifmedia;
102 device_t sc_dev;
103 device_t sc_miibus;
104 struct mii_data *sc_mii; /* MII media control */
105 struct callout sc_tick_ch; /* tick callout */
106
107 /* The following bus handles are to be provided by the bus front-end */
108 bus_dma_tag_t sc_pdmatag; /* bus dma parent tag */
109 bus_dma_tag_t sc_cdmatag; /* control bus dma tag */
110 bus_dmamap_t sc_cdmamap; /* control bus dma handle */
111 bus_dma_tag_t sc_rdmatag; /* RX bus dma tag */
112 bus_dma_tag_t sc_tdmatag; /* RX bus dma tag */
113 bus_space_handle_t sc_sebh; /* HME Global registers */
114 bus_space_handle_t sc_erxh; /* HME ERX registers */
115 bus_space_handle_t sc_etxh; /* HME ETX registers */
116 bus_space_handle_t sc_mach; /* HME MAC registers */
117 bus_space_handle_t sc_mifh; /* HME MIF registers */
118 bus_space_tag_t sc_sebt; /* HME Global registers */
119 bus_space_tag_t sc_erxt; /* HME ERX registers */
120 bus_space_tag_t sc_etxt; /* HME ETX registers */
121 bus_space_tag_t sc_mact; /* HME MAC registers */
122 bus_space_tag_t sc_mift; /* HME MIF registers */
123 bus_addr_t sc_sebo; /* HME Global registers */
124 bus_addr_t sc_erxo; /* HME ERX registers */
125 bus_addr_t sc_etxo; /* HME ETX registers */
126 bus_addr_t sc_maco; /* HME MAC registers */
127 bus_addr_t sc_mifo; /* HME MIF registers */
128 int sc_burst; /* DVMA burst size in effect */
129 int sc_phys[2]; /* MII instance -> PHY map */
130
131 int sc_pci; /* XXXXX -- PCI buses are LE. */
132
133 /* Ring descriptor */
134 struct hme_ring sc_rb;
135
136 int sc_debug;
137
138 /* Special hardware hooks */
139 void (*sc_hwreset)(struct hme_softc *);
140 void (*sc_hwinit)(struct hme_softc *);
141 };
142
143 extern devclass_t hme_devclass;
144
145 int hme_config(struct hme_softc *);
146 void hme_intr(void *);
147
148 /* MII methods & callbacks */
149 int hme_mii_readreg(device_t, int, int);
150 int hme_mii_writereg(device_t, int, int, int);
151 void hme_mii_statchg(device_t);
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