251 lines
9.0 KiB
C
251 lines
9.0 KiB
C
/* $NetBSD: mscpvar.h,v 1.8 2000/01/21 23:39:59 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
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* Copyright (c) 1988 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)mscpvar.h 7.3 (Berkeley) 6/28/90
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*/
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/*
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* MSCP generic driver configuration
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*/
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/*
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* Enabling MSCP_PARANOIA makes the response code perform various checks
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* on the hardware. (Right now it verifies only the buffer pointer in
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* mscp_cmdref.)
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*
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* Enabling AVOID_EMULEX_BUG selects an alternative method of identifying
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* transfers in progress, which gets around a rather peculiar bug in the
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* SC41/MS. Enabling MSCP_PARANOIA instead should work, but will cause
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* `extra' Unibus resets.
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*
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* Either of these flags can simply be included as an `options' line in
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* your configuration file.
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*/
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/* #define MSCP_PARANOIA */
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/* #define AVOID_EMULEX_BUG */
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/*
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* Ring information, per ring (one each for commands and responses).
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*/
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struct mscp_ri {
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int mri_size; /* ring size */
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int mri_next; /* next (expected|free) */
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long *mri_desc; /* base address of descriptors */
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struct mscp *mri_ring; /* base address of packets */
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};
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/*
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* Transfer info, one per command packet.
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*/
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struct mscp_xi {
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bus_dmamap_t mxi_dmam; /* Allocated DMA map for this entry */
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struct buf * mxi_bp; /* Buffer used in this command */
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struct mscp * mxi_mp; /* Packet used in this command */
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int mxi_inuse;
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};
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struct mscp_ctlr {
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void (*mc_ctlrdone) /* controller operation complete */
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__P((struct device *));
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void (*mc_go) /* device-specific start routine */
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__P((struct device *, struct mscp_xi *));
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void (*mc_saerror) /* ctlr error handling */
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__P((struct device *, int));
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};
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struct mscp_softc;
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struct mscp_device {
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void (*me_dgram) /* error datagram */
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__P((struct device *, struct mscp *, struct mscp_softc *));
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void (*me_iodone) /* normal I/O is done */
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__P((struct device *, struct buf *));
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int (*me_online) /* drive on line */
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__P((struct device *, struct mscp *));
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int (*me_gotstatus) /* got unit status */
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__P((struct device *, struct mscp *));
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void (*me_replace) /* replace done */
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__P((struct device *, struct mscp *));
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int (*me_ioerr) /* read or write failed */
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__P((struct device *, struct mscp *, struct buf *));
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void (*me_bb) /* B_BAD io done */
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__P((struct device *, struct mscp *, struct buf *));
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void (*me_fillin) /* Fill in mscp info for this drive */
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__P((struct buf *,struct mscp *));
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void (*me_cmddone) /* Non-data transfer operation is done */
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__P((struct device *, struct mscp *));
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};
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/*
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* This struct is used when attaching a mscpbus.
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*/
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struct mscp_attach_args {
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struct mscp_ctlr *ma_mc; /* Pointer to ctlr's mscp_ctlr */
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int ma_type; /* disk/tape bus type */
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struct mscp_pack *ma_uda; /* comm area virtual */
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struct mscp_softc **ma_softc; /* backpointer to bus softc */
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bus_dmamap_t ma_dmam; /* This comm area dma info */
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bus_dma_tag_t ma_dmat;
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bus_space_tag_t ma_iot;
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bus_space_handle_t ma_iph; /* initialisation and polling */
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bus_space_handle_t ma_sah; /* status & address (read part) */
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bus_space_handle_t ma_swh; /* status & address (write part) */
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short ma_ivec; /* Interrupt vector to use */
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char ma_ctlrnr; /* Phys ctlr nr */
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char ma_adapnr; /* Phys adapter nr */
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};
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#define MSCPBUS_DISK 001 /* Bus is used for disk mounts */
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#define MSCPBUS_TAPE 002 /* Bus is used for tape mounts */
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#define MSCPBUS_UDA 004 /* ctlr is disk on unibus/qbus */
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#define MSCPBUS_KDB 010 /* ctlr is disk on BI */
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#define MSCPBUS_KLE 020 /* ctlr is tape on unibus/qbus */
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/*
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* Used when going for child devices.
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*/
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struct drive_attach_args {
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struct mscp *da_mp; /* this devices response struct */
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int da_typ; /* Parent of type */
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};
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/*
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* Return values from functions.
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* MSCP_RESTARTED is peculiar to I/O errors.
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*/
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#define MSCP_DONE 0 /* all ok */
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#define MSCP_FAILED 1 /* no go */
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#define MSCP_RESTARTED 2 /* transfer restarted */
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/*
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* Per device information.
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*
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* mi_ip is a pointer to the inverting pointers (things that get `ui's
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* given unit numbers) FOR THIS CONTROLLER (NOT the whole set!).
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*
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* b_actf holds a queue of those transfers that were started but have
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* not yet finished. Other Unibus drivers do not need this as they hand
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* out requests one at a time. MSCP devices, however, take a slew of
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* requests and pick their own order to execute them. This means that
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* we have to have a place to move transfers that were given to the
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* controller, so we can tell those apart from those that have not yet
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* been handed out; b_actf is that place.
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*/
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struct mscp_softc {
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struct device mi_dev; /* Autoconf stuff */
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struct mscp_ri mi_cmd; /* MSCP command ring info */
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struct mscp_ri mi_rsp; /* MSCP response ring info */
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bus_dma_tag_t mi_dmat;
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bus_dmamap_t mi_dmam;
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struct mscp_xi mi_xi[NCMD];
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int mi_mxiuse; /* Bitfield of inuse mxi packets */
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short mi_credits; /* transfer credits */
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char mi_wantcmd; /* waiting for command packet */
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char mi_wantcredits; /* waiting for transfer credits */
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struct mscp_ctlr *mi_mc; /* Pointer to parent's mscp_ctlr */
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struct mscp_device *mi_me; /* Pointer to child's mscp_device */
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struct device **mi_dp; /* array of backpointers */
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int mi_driveno; /* Max physical drive number found */
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char mi_ctlrnr; /* Phys ctlr nr */
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char mi_adapnr; /* Phys adapter nr */
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int mi_flags;
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struct mscp_pack *mi_uda; /* virtual address */
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int mi_type;
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short mi_ivec; /* Interrupt vector to use */
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short mi_ierr; /* Init err counter */
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bus_space_tag_t mi_iot;
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bus_space_handle_t mi_iph; /* initialisation and polling */
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bus_space_handle_t mi_sah; /* status & address (read part) */
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bus_space_handle_t mi_swh; /* status & address (write part) */
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struct buf_queue mi_resq; /* While waiting for packets */
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};
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/* mi_flags */
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#define MSC_STARTPOLL 1
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#define MSC_INSTART 2
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#define MSC_IGNOREINTR 4
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#define MSC_READY 8
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/*
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* We have run out of credits when mi_credits is <= MSCP_MINCREDITS.
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* It is still possible to issue one command in this case, but it must
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* not be a data transfer. E.g., `get command status' or `abort command'
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* is legal, while `read' is not.
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*/
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#define MSCP_MINCREDITS 1
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/*
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* Flags for mscp_getcp().
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*/
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#define MSCP_WAIT 1
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#define MSCP_DONTWAIT 0
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/* get a command packet */
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/*
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* Unit flags
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*/
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#define UNIT_ONLINE 0x01 /* drive is on line */
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#define UNIT_HAVESTATUS 0x02 /* got unit status */
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#define UNIT_REQUEUE 0x04 /* requeue after response */
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/*
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* Handle a command ring transition: wake up sleepers for command packets.
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* This is too simple to bother with a function call.
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*/
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#define MSCP_DOCMD(mi) { \
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if ((mi)->mi_wantcmd) { \
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(mi)->mi_wantcmd = 0; \
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wakeup((caddr_t) &(mi)->mi_wantcmd); \
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} \
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}
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/* Prototypes */
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struct mscp *mscp_getcp __P((struct mscp_softc *, int));
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void mscp_printevent __P((struct mscp *));
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void mscp_go __P((struct mscp_softc *, struct mscp *, int));
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void mscp_requeue __P((struct mscp_softc *));
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void mscp_dorsp __P((struct mscp_softc *));
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int mscp_decodeerror __P((char *, struct mscp *, struct mscp_softc *));
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int mscp_print __P((void *, const char *));
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void mscp_hexdump __P((struct mscp *));
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void mscp_strategy __P((struct buf *, struct device *));
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void mscp_printtype __P((int, int));
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int mscp_waitstep __P((struct mscp_softc *, int, int));
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void mscp_dgo __P((struct mscp_softc *, struct mscp_xi *));
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void mscp_intr __P((struct mscp_softc *));
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