104 lines
3.9 KiB
C
104 lines
3.9 KiB
C
/* $NetBSD: sbcvar.h,v 1.7 1998/12/22 08:47:05 scottr 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) __P((struct ncr5380_softc *));
|
|
int sc_options; /* options for this instance. */
|
|
struct sbc_pdma_handle sc_pdma[SCI_OPENINGS];
|
|
};
|
|
|
|
/*
|
|
* 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_OPTIONS_MASK (SBC_RESELECT|SBC_INTR|SBC_PDMA)
|
|
#define SBC_OPTIONS_BITS "\10\3RESELECT\2INTR\1PDMA"
|
|
|
|
extern int sbc_debug;
|
|
extern int sbc_link_flags;
|
|
extern int sbc_options;
|
|
extern struct scsipi_device sbc_dev;
|
|
|
|
int sbc_pdma_in __P((struct ncr5380_softc *, int, int, u_char *));
|
|
int sbc_pdma_out __P((struct ncr5380_softc *, int, int, u_char *));
|
|
void sbc_irq_intr __P((void *));
|
|
void sbc_drq_intr __P((void *));
|
|
void sbc_dma_alloc __P((struct ncr5380_softc *));
|
|
void sbc_dma_free __P((struct ncr5380_softc *));
|
|
void sbc_dma_poll __P((struct ncr5380_softc *));
|
|
void sbc_dma_setup __P((struct ncr5380_softc *));
|
|
void sbc_dma_start __P((struct ncr5380_softc *));
|
|
void sbc_dma_eop __P((struct ncr5380_softc *));
|
|
void sbc_dma_stop __P((struct ncr5380_softc *));
|
|
#ifdef SBC_DEBUG
|
|
void decode_5380_intr __P((struct ncr5380_softc *));
|
|
#endif
|