/* $NetBSD: sbcvar.h,v 1.15 2024/11/22 07:16:01 nat Exp $ */ /* * Copyright (C) 1996 Scott Reynolds. 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 author may not be used to endorse or promote products * derived from this software without specific prior written permission * * 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. */ /* * Transfers smaller than this are done using PIO * (on assumption they're not worth PDMA overhead) */ #define MIN_DMA_LEN 128 /* * Transfers larger than 8192 bytes need to be split up * due to the size of the PDMA space. */ #define MAX_DMA_LEN 0x2000 /* * This structure is used to keep track of PDMA requests. */ struct sbc_pdma_handle { int dh_flags; /* flags */ #define SBC_DH_BUSY 0x01 /* This handle is in use */ #define SBC_DH_OUT 0x02 /* PDMA data out (write) */ #define SBC_DH_DONE 0x04 /* PDMA transfer is complete */ u_char *dh_addr; /* data buffer */ int dh_len; /* length of data buffer */ }; /* * The first structure member has to be the ncr5380_softc * so we can just cast to go back and forth between them. */ struct sbc_softc { struct ncr5380_softc ncr_sc; volatile struct sbc_regs *sc_regs; volatile vaddr_t sc_drq_addr; volatile vaddr_t sc_nodrq_addr; void (*sc_clrintr)(struct ncr5380_softc *); volatile int sc_resid; int sc_options; /* options for this instance. */ struct sbc_pdma_handle sc_pdma[SCI_OPENINGS]; kmutex_t sc_drq_lock; }; /* * Options. By default, SCSI interrupts and reselect are disabled. * You may enable either of these features with the `flags' directive * in your kernel's configuration file. * * Alternatively, you can patch your kernel with DDB or some other * mechanism. The sc_options member of the softc is OR'd with * the value in sbc_options. * * The options code is based on the sparc 'si' driver's version of * the same. */ #define SBC_PDMA 0x01 /* Use PDMA for polled transfers */ #define SBC_INTR 0x02 /* Allow SCSI IRQ/DRQ interrupts */ #define SBC_RESELECT 0x04 /* Allow disconnect/reselect */ #define SBC_PDMA_NO_WRITE 0x08 /* No PDMA for writes */ #define SBC_OPTIONS_MASK (SBC_PDMA_NO_WRITE|SBC_RESELECT|SBC_INTR|SBC_PDMA) #define SBC_OPTIONS_BITS "\10\4NOWRITE\3RESELECT\2INTR\1PDMA" extern int sbc_debug; extern int sbc_link_flags; extern int sbc_options; int sbc_pdma_in(struct ncr5380_softc *, int, int, u_char *); int sbc_pdma_out(struct ncr5380_softc *, int, int, u_char *); void sbc_irq_intr(void *); void sbc_drq_intr(void *); void sbc_dma_alloc(struct ncr5380_softc *); void sbc_dma_free(struct ncr5380_softc *); void sbc_dma_poll(struct ncr5380_softc *); void sbc_dma_setup(struct ncr5380_softc *); void sbc_dma_start(struct ncr5380_softc *); void sbc_dma_eop(struct ncr5380_softc *); void sbc_dma_stop(struct ncr5380_softc *); #ifdef SBC_DEBUG void decode_5380_intr(struct ncr5380_softc *); #endif
