/* $NetBSD: sivar.h,v 1.12 2023/01/23 22:16:44 andvar Exp $ */ /*- * Copyright (c) 1996 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Glass, David Jones, and Gordon W. Ross. * * 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 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. */ /* * This file defines the interface between si.c and * the bus-specific files: si_obio.c, si_vme.c */ /* * Transfers smaller than this are done using PIO * (on assumption they're not worth DMA overhead) */ #define MIN_DMA_LEN 128 /* * Transfers larger than 65535 bytes need to be split-up. * (Some of the FIFO logic has only 16 bits counters.) * Make the size an integer multiple of the page size * to avoid buf/cluster remap problems. (paranoid?) */ #define MAX_DMA_LEN 0xE000 /* * This structure is used to keep track of mapped DMA requests. */ struct si_dma_handle { int dh_flags; #define SIDH_BUSY 1 /* This DH is in use */ #define SIDH_OUT 2 /* DMA does data out (write) */ vaddr_t dh_dmaaddr; /* VA of buffer in DVMA space */ vsize_t dh_dmalen; /* Length of KVA mapping. */ }; /* * The first structure member has to be the ncr5380_softc * so we can just cast to go back and fourth between them. */ struct si_softc { struct ncr5380_softc ncr_sc; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; volatile struct si_regs *sc_regs; bus_dma_tag_t sc_dmat; bus_dmamap_t sc_dmap; int sc_adapter_type; int sc_adapter_iv_am; /* int. vec + address modifier */ int sc_options; /* options for this instance */ int sc_reqlen; /* requested transfer length */ struct si_dma_handle *sc_dma; /* DMA command block for the OBIO controller. */ void *sc_dmacmd; }; /* Options for disconnect/reselect, DMA, and interrupts. */ #define SI_NO_DISCONNECT 0xff #define SI_NO_PARITY_CHK 0xff00 #define SI_FORCE_POLLING 0x10000 #define SI_DISABLE_DMA 0x20000 /* The options are taken from the config file (PR#1929) */ extern int si_debug; void si_attach(struct si_softc *); int si_intr(void *); void si_dma_alloc(struct ncr5380_softc *); void si_dma_free(struct ncr5380_softc *); void si_dma_poll(struct ncr5380_softc *); |