diff options
Diffstat (limited to 'sys/dev/hme/if_hmevar.h')
| -rw-r--r-- | sys/dev/hme/if_hmevar.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/sys/dev/hme/if_hmevar.h b/sys/dev/hme/if_hmevar.h new file mode 100644 index 0000000..7e1c5ed --- /dev/null +++ b/sys/dev/hme/if_hmevar.h @@ -0,0 +1,161 @@ +/*- + * Copyright (c) 1999 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Paul Kranenburg. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * from: NetBSD: hmevar.h,v 1.5 2000/06/25 01:10:04 eeh Exp + * + * $FreeBSD$ + */ + +#include <sys/callout.h> + +/* + * Number of receive and transmit descriptors. For each receive descriptor, + * an mbuf cluster is allocated and set up to receive a packet, and a dma map + * is created. Therefore, this number should not be too high to not waste + * memory. + * TX descriptors have no static cost, except for the memory directly allocated + * for them. TX queue elements (the number of which is fixed by HME_NTXQ) hold + * the software state for a transmit job; each has a dmamap allocated for it. + * There may be multiple descriptors allocated to a single queue element. + * HME_NTXQ is completely arbitrary. + */ +#define HME_NRXDESC 128 +#define HME_NTXDESC 128 +#define HME_NTXQ (HME_NTXDESC / 2) + +/* Maximum size of a mapped RX buffer. */ +#define HME_BUFSZ 1600 + +/* + * RX DMA descriptor. The descriptors are preallocated; the dma map is + * reused. + */ +struct hme_rxdesc { + struct mbuf *hrx_m; + bus_dmamap_t hrx_dmamap; +}; + +/* Lazily leave at least one burst size grace space. */ +#define HME_DESC_RXLEN(sc, d) \ + ulmin(HME_BUFSZ, (d)->hrx_m->m_len - (sc)->sc_burst) + +struct hme_txdesc { + struct mbuf *htx_m; + bus_dmamap_t htx_dmamap; + int htx_lastdesc; + STAILQ_ENTRY(hme_txdesc) htx_q; +}; + +STAILQ_HEAD(hme_txdq, hme_txdesc); + +/* Value for htx_flags */ +#define HTXF_MAPPED 1 + +struct hme_ring { + /* Ring Descriptors */ + caddr_t rb_membase; /* Packet buffer: CPU address */ + bus_addr_t rb_dmabase; /* Packet buffer: DMA address */ + caddr_t rb_txd; /* Transmit descriptors */ + bus_addr_t rb_txddma; /* DMA address of same */ + caddr_t rb_rxd; /* Receive descriptors */ + bus_addr_t rb_rxddma; /* DMA address of same */ + + /* Ring Descriptor state */ + int rb_tdhead, rb_tdtail; + int rb_rdtail; + int rb_td_nbusy; + + /* Descriptors */ + struct hme_rxdesc rb_rxdesc[HME_NRXDESC]; + struct hme_txdesc rb_txdesc[HME_NTXQ]; + + struct hme_txdq rb_txfreeq; + struct hme_txdq rb_txbusyq; + + bus_dmamap_t rb_spare_dmamap; +}; + +struct hme_softc { + struct arpcom sc_arpcom; + struct ifmedia sc_ifmedia; + device_t sc_dev; + device_t sc_miibus; + struct mii_data *sc_mii; /* MII media control */ + struct callout sc_tick_ch; /* tick callout */ + + /* The following bus handles are to be provided by the bus front-end */ + bus_dma_tag_t sc_pdmatag; /* bus dma parent tag */ + bus_dma_tag_t sc_cdmatag; /* control bus dma tag */ + bus_dmamap_t sc_cdmamap; /* control bus dma handle */ + bus_dma_tag_t sc_rdmatag; /* RX bus dma tag */ + bus_dma_tag_t sc_tdmatag; /* RX bus dma tag */ + bus_space_handle_t sc_sebh; /* HME Global registers */ + bus_space_handle_t sc_erxh; /* HME ERX registers */ + bus_space_handle_t sc_etxh; /* HME ETX registers */ + bus_space_handle_t sc_mach; /* HME MAC registers */ + bus_space_handle_t sc_mifh; /* HME MIF registers */ + bus_space_tag_t sc_sebt; /* HME Global registers */ + bus_space_tag_t sc_erxt; /* HME ERX registers */ + bus_space_tag_t sc_etxt; /* HME ETX registers */ + bus_space_tag_t sc_mact; /* HME MAC registers */ + bus_space_tag_t sc_mift; /* HME MIF registers */ + bus_addr_t sc_sebo; /* HME Global registers */ + bus_addr_t sc_erxo; /* HME ERX registers */ + bus_addr_t sc_etxo; /* HME ETX registers */ + bus_addr_t sc_maco; /* HME MAC registers */ + bus_addr_t sc_mifo; /* HME MIF registers */ + int sc_burst; /* DVMA burst size in effect */ + int sc_phys[2]; /* MII instance -> PHY map */ + + int sc_pci; /* XXXXX -- PCI buses are LE. */ + + /* Ring descriptor */ + struct hme_ring sc_rb; + + int sc_debug; +}; + +extern devclass_t hme_devclass; + +int hme_config(struct hme_softc *); +void hme_detach(struct hme_softc *); +void hme_suspend(struct hme_softc *); +void hme_resume(struct hme_softc *); +void hme_intr(void *); + +/* MII methods & callbacks */ +int hme_mii_readreg(device_t, int, int); +int hme_mii_writereg(device_t, int, int, int); +void hme_mii_statchg(device_t); |
