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Diffstat (limited to 'sys/arch/sun3/dev/sivar.h')
| -rw-r--r-- | sys/arch/sun3/dev/sivar.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/sys/arch/sun3/dev/sivar.h b/sys/arch/sun3/dev/sivar.h new file mode 100644 index 00000000000..1bbaee4b7b3 --- /dev/null +++ b/sys/arch/sun3/dev/sivar.h @@ -0,0 +1,89 @@ +/* $NetBSD: sivar.h,v 1.1 1996/03/26 15:01:15 gwr Exp $ */ + +/* + * Copyright (c) 1995 David Jones, Gordon W. Ross + * 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. + * 3. The name of the authors may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * 4. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by + * David Jones and Gordon Ross + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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 lager 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) */ + u_char * dh_addr; /* KVA of start of buffer */ + int dh_maplen; /* Length of KVA mapping. */ + long dh_dvma; /* VA of buffer in DVMA space */ +}; + +/* + * 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; + volatile struct si_regs *sc_regs; + int sc_adapter_type; + int sc_adapter_iv_am; /* int. vec + address modifier */ + int sc_reqlen; /* requested transfer length */ + struct si_dma_handle *sc_dma; + /* DMA command block for the OBIO controller. */ + void *sc_dmacmd; +}; + +extern int si_debug; + +void si_attach __P((struct si_softc *)); +int si_intr __P((void *)); + +void si_reset_adapter __P((struct ncr5380_softc *)); + +void si_dma_alloc __P((struct ncr5380_softc *)); +void si_dma_free __P((struct ncr5380_softc *)); +void si_dma_poll __P((struct ncr5380_softc *)); |