/* $OpenBSD: gemvar.h,v 1.5 2002/01/28 01:04:02 jason Exp $ */ /* $NetBSD: gemvar.h,v 1.4 2001/10/18 15:09:15 thorpej Exp $ */ /* * * Copyright (C) 2001 Eduardo Horvath. * All rights reserved. * * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * */ #ifndef _IF_GEMVAR_H #define _IF_GEMVAR_H #include #include #if NRND > 0 #include #endif /* * Misc. definitions for the Sun ``Gem'' Ethernet controller family driver. */ /* * Transmit descriptor list size. This is arbitrary, but allocate * enough descriptors for 64 pending transmissions and 16 segments * per packet. */ #define GEM_NTXSEGS 16 #define GEM_TXQUEUELEN 8 #define GEM_NTXDESC (GEM_TXQUEUELEN * GEM_NTXSEGS) #define GEM_NTXDESC_MASK (GEM_NTXDESC - 1) #define GEM_NEXTTX(x) ((x + 1) & GEM_NTXDESC_MASK) /* * Receive descriptor list size. We have one Rx buffer per incoming * packet, so this logic is a little simpler. */ #define GEM_NRXDESC 128 #define GEM_NRXDESC_MASK (GEM_NRXDESC - 1) #define GEM_NEXTRX(x) ((x + 1) & GEM_NRXDESC_MASK) /* * Control structures are DMA'd to the GEM chip. We allocate them in * a single clump that maps to a single DMA segment to make several things * easier. */ struct gem_control_data { /* * The transmit descriptors. */ struct gem_desc gcd_txdescs[GEM_NTXDESC]; /* * The receive descriptors. */ struct gem_desc gcd_rxdescs[GEM_NRXDESC]; u_int8_t gcd_txbufs[GEM_NTXDESC][MCLBYTES]; }; #define GEM_CDOFF(x) offsetof(struct gem_control_data, x) #define GEM_CDTXOFF(x) GEM_CDOFF(gcd_txdescs[(x)]) #define GEM_CDRXOFF(x) GEM_CDOFF(gcd_rxdescs[(x)]) /* * Software state for transmit jobs. */ struct gem_txsoft { struct mbuf *txs_mbuf; /* head of our mbuf chain */ bus_dmamap_t txs_dmamap; /* our DMA map */ int txs_firstdesc; /* first descriptor in packet */ int txs_lastdesc; /* last descriptor in packet */ int txs_ndescs; /* number of descriptors */ SIMPLEQ_ENTRY(gem_txsoft) txs_q; }; SIMPLEQ_HEAD(gem_txsq, gem_txsoft); /* * Software state for receive jobs. */ struct gem_rxsoft { struct mbuf *rxs_mbuf; /* head of our mbuf chain */ bus_dmamap_t rxs_dmamap; /* our DMA map */ }; /* * Software state per device. */ struct gem_softc { struct device sc_dev; /* generic device information */ struct arpcom sc_arpcom; /* ethernet common data */ struct mii_data sc_mii; /* MII media control */ #define sc_media sc_mii.mii_media/* shorthand */ struct timeout sc_tick_ch; /* tick callout */ /* The following bus handles are to be provided by the bus front-end */ bus_space_tag_t sc_bustag; /* bus tag */ bus_dma_tag_t sc_dmatag; /* bus dma tag */ bus_dmamap_t sc_dmamap; /* bus dma handle */ bus_space_handle_t sc_h; /* bus space handle for all regs */ int sc_phys[2]; /* MII instance -> PHY map */ int sc_mif_config; /* Selected MII reg setting */ int sc_pci; /* XXXXX -- PCI buses are LE. */ void *sc_sdhook; /* shutdown hook */ void *sc_powerhook; /* power management hook */ /* * Ring buffer DMA stuff. */ bus_dma_segment_t sc_cdseg; /* control data memory */ int sc_cdnseg; /* number of segments */ bus_dmamap_t sc_cddmamap; /* control data DMA map */ #define sc_cddma sc_cddmamap->dm_segs[0].ds_addr /* * Software state for transmit and receive descriptors. */ struct gem_txsoft sc_txsoft[GEM_TXQUEUELEN]; struct gem_rxsoft sc_rxsoft[GEM_NRXDESC]; u_int32_t sc_tx_prod, sc_tx_cons, sc_tx_cnt; /* * Control data structures. */ struct gem_control_data *sc_control_data; #define sc_txdescs sc_control_data->gcd_txdescs #define sc_rxdescs sc_control_data->gcd_rxdescs int sc_rxptr; /* next ready RX descriptor/descsoft */ /* ========== */ int sc_inited; int sc_debug; void *sc_sh; /* shutdownhook cookie */ /* Special hardware hooks */ void (*sc_hwreset) __P((struct gem_softc *)); void (*sc_hwinit) __P((struct gem_softc *)); #if NRND > 0 rndsource_element_t rnd_source; #endif }; #define GEM_DMA_READ(sc, v) (((sc)->sc_pci) ? letoh64(v) : betoh64(v)) #define GEM_DMA_WRITE(sc, v) (((sc)->sc_pci) ? htole64(v) : htobe64(v)) #define GEM_CDTXADDR(sc, x) ((sc)->sc_cddma + GEM_CDTXOFF((x))) #define GEM_CDRXADDR(sc, x) ((sc)->sc_cddma + GEM_CDRXOFF((x))) #define GEM_CDSPADDR(sc) ((sc)->sc_cddma + GEM_CDSPOFF) #define GEM_CDTXSYNC(sc, x, n, ops) \ do { \ int __x, __n; \ \ __x = (x); \ __n = (n); \ \ /* If it will wrap around, sync to the end of the ring. */ \ if ((__x + __n) > GEM_NTXDESC) { \ bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ GEM_CDTXOFF(__x), sizeof(struct gem_desc) * \ (GEM_NTXDESC - __x), (ops)); \ __n -= (GEM_NTXDESC - __x); \ __x = 0; \ } \ \ /* Now sync whatever is left. */ \ bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ GEM_CDTXOFF(__x), sizeof(struct gem_desc) * __n, (ops)); \ } while (0) #define GEM_CDRXSYNC(sc, x, ops) \ bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ GEM_CDRXOFF((x)), sizeof(struct gem_desc), (ops)) #define GEM_CDSPSYNC(sc, ops) \ bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ GEM_CDSPOFF, GEM_SETUP_PACKET_LEN, (ops)) #define GEM_INIT_RXDESC(sc, x) \ do { \ struct gem_rxsoft *__rxs = &sc->sc_rxsoft[(x)]; \ struct gem_desc *__rxd = &sc->sc_rxdescs[(x)]; \ struct mbuf *__m = __rxs->rxs_mbuf; \ \ __m->m_data = __m->m_ext.ext_buf; \ __rxd->gd_addr = \ GEM_DMA_WRITE((sc), __rxs->rxs_dmamap->dm_segs[0].ds_addr); \ __rxd->gd_flags = \ GEM_DMA_WRITE((sc), \ (((__m->m_ext.ext_size)<