251 lines
9.0 KiB
C
251 lines
9.0 KiB
C
/* $NetBSD: mscpvar.h,v 1.7 1999/06/06 19:16:18 ragge Exp $ */
|
|
/*
|
|
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
|
|
* Copyright (c) 1988 Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Chris Torek.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)mscpvar.h 7.3 (Berkeley) 6/28/90
|
|
*/
|
|
|
|
/*
|
|
* MSCP generic driver configuration
|
|
*/
|
|
|
|
/*
|
|
* Enabling MSCP_PARANOIA makes the response code perform various checks
|
|
* on the hardware. (Right now it verifies only the buffer pointer in
|
|
* mscp_cmdref.)
|
|
*
|
|
* Enabling AVOID_EMULEX_BUG selects an alternative method of identifying
|
|
* transfers in progress, which gets around a rather peculiar bug in the
|
|
* SC41/MS. Enabling MSCP_PARANOIA instead should work, but will cause
|
|
* `extra' Unibus resets.
|
|
*
|
|
* Either of these flags can simply be included as an `options' line in
|
|
* your configuration file.
|
|
*/
|
|
|
|
/* #define MSCP_PARANOIA */
|
|
/* #define AVOID_EMULEX_BUG */
|
|
|
|
/*
|
|
* Ring information, per ring (one each for commands and responses).
|
|
*/
|
|
struct mscp_ri {
|
|
int mri_size; /* ring size */
|
|
int mri_next; /* next (expected|free) */
|
|
long *mri_desc; /* base address of descriptors */
|
|
struct mscp *mri_ring; /* base address of packets */
|
|
};
|
|
|
|
/*
|
|
* Transfer info, one per command packet.
|
|
*/
|
|
struct mscp_xi {
|
|
bus_dmamap_t mxi_dmam; /* Allocated DMA map for this entry */
|
|
struct buf * mxi_bp; /* Buffer used in this command */
|
|
struct mscp * mxi_mp; /* Packet used in this command */
|
|
int mxi_inuse;
|
|
};
|
|
|
|
struct mscp_ctlr {
|
|
void (*mc_ctlrdone) /* controller operation complete */
|
|
__P((struct device *));
|
|
void (*mc_go) /* device-specific start routine */
|
|
__P((struct device *, struct mscp_xi *));
|
|
void (*mc_saerror) /* ctlr error handling */
|
|
__P((struct device *, int));
|
|
};
|
|
|
|
struct mscp_softc;
|
|
|
|
struct mscp_device {
|
|
void (*me_dgram) /* error datagram */
|
|
__P((struct device *, struct mscp *, struct mscp_softc *));
|
|
void (*me_iodone) /* normal I/O is done */
|
|
__P((struct device *, struct buf *));
|
|
int (*me_online) /* drive on line */
|
|
__P((struct device *, struct mscp *));
|
|
int (*me_gotstatus) /* got unit status */
|
|
__P((struct device *, struct mscp *));
|
|
void (*me_replace) /* replace done */
|
|
__P((struct device *, struct mscp *));
|
|
int (*me_ioerr) /* read or write failed */
|
|
__P((struct device *, struct mscp *, struct buf *));
|
|
void (*me_bb) /* B_BAD io done */
|
|
__P((struct device *, struct mscp *, struct buf *));
|
|
void (*me_fillin) /* Fill in mscp info for this drive */
|
|
__P((struct buf *,struct mscp *));
|
|
void (*me_cmddone) /* Non-data transfer operation is done */
|
|
__P((struct device *, struct mscp *));
|
|
};
|
|
|
|
/*
|
|
* This struct is used when attaching a mscpbus.
|
|
*/
|
|
struct mscp_attach_args {
|
|
struct mscp_ctlr *ma_mc; /* Pointer to ctlr's mscp_ctlr */
|
|
int ma_type; /* disk/tape bus type */
|
|
struct mscp_pack *ma_uda; /* comm area virtual */
|
|
struct mscp_softc **ma_softc; /* backpointer to bus softc */
|
|
bus_dmamap_t ma_dmam; /* This comm area dma info */
|
|
bus_dma_tag_t ma_dmat;
|
|
bus_space_tag_t ma_iot;
|
|
bus_space_handle_t ma_iph; /* initialisation and polling */
|
|
bus_space_handle_t ma_sah; /* status & address (read part) */
|
|
bus_space_handle_t ma_swh; /* status & address (write part) */
|
|
short ma_ivec; /* Interrupt vector to use */
|
|
char ma_ctlrnr; /* Phys ctlr nr */
|
|
char ma_adapnr; /* Phys adapter nr */
|
|
};
|
|
#define MSCPBUS_DISK 001 /* Bus is used for disk mounts */
|
|
#define MSCPBUS_TAPE 002 /* Bus is used for tape mounts */
|
|
#define MSCPBUS_UDA 004 /* ctlr is disk on unibus/qbus */
|
|
#define MSCPBUS_KDB 010 /* ctlr is disk on BI */
|
|
#define MSCPBUS_KLE 020 /* ctlr is tape on unibus/qbus */
|
|
|
|
/*
|
|
* Used when going for child devices.
|
|
*/
|
|
struct drive_attach_args {
|
|
struct mscp *da_mp; /* this devices response struct */
|
|
int da_typ; /* Parent of type */
|
|
};
|
|
|
|
/*
|
|
* Return values from functions.
|
|
* MSCP_RESTARTED is peculiar to I/O errors.
|
|
*/
|
|
#define MSCP_DONE 0 /* all ok */
|
|
#define MSCP_FAILED 1 /* no go */
|
|
#define MSCP_RESTARTED 2 /* transfer restarted */
|
|
|
|
/*
|
|
* Per device information.
|
|
*
|
|
* mi_ip is a pointer to the inverting pointers (things that get `ui's
|
|
* given unit numbers) FOR THIS CONTROLLER (NOT the whole set!).
|
|
*
|
|
* b_actf holds a queue of those transfers that were started but have
|
|
* not yet finished. Other Unibus drivers do not need this as they hand
|
|
* out requests one at a time. MSCP devices, however, take a slew of
|
|
* requests and pick their own order to execute them. This means that
|
|
* we have to have a place to move transfers that were given to the
|
|
* controller, so we can tell those apart from those that have not yet
|
|
* been handed out; b_actf is that place.
|
|
*/
|
|
struct mscp_softc {
|
|
struct device mi_dev; /* Autoconf stuff */
|
|
struct mscp_ri mi_cmd; /* MSCP command ring info */
|
|
struct mscp_ri mi_rsp; /* MSCP response ring info */
|
|
bus_dma_tag_t mi_dmat;
|
|
bus_dmamap_t mi_dmam;
|
|
struct mscp_xi mi_xi[NCMD];
|
|
int mi_mxiuse; /* Bitfield of inuse mxi packets */
|
|
short mi_credits; /* transfer credits */
|
|
char mi_wantcmd; /* waiting for command packet */
|
|
char mi_wantcredits; /* waiting for transfer credits */
|
|
struct mscp_ctlr *mi_mc; /* Pointer to parent's mscp_ctlr */
|
|
struct mscp_device *mi_me; /* Pointer to child's mscp_device */
|
|
struct device **mi_dp; /* array of backpointers */
|
|
int mi_driveno; /* Max physical drive number found */
|
|
char mi_ctlrnr; /* Phys ctlr nr */
|
|
char mi_adapnr; /* Phys adapter nr */
|
|
int mi_flags;
|
|
struct mscp_pack *mi_uda; /* virtual address */
|
|
int mi_type;
|
|
short mi_ivec; /* Interrupt vector to use */
|
|
short mi_ierr; /* Init err counter */
|
|
bus_space_tag_t mi_iot;
|
|
bus_space_handle_t mi_iph; /* initialisation and polling */
|
|
bus_space_handle_t mi_sah; /* status & address (read part) */
|
|
bus_space_handle_t mi_swh; /* status & address (write part) */
|
|
SIMPLEQ_HEAD(, buf) mi_resq; /* While waiting for packets */
|
|
};
|
|
|
|
/* mi_flags */
|
|
#define MSC_STARTPOLL 1
|
|
#define MSC_INSTART 2
|
|
#define MSC_IGNOREINTR 4
|
|
#define MSC_READY 8
|
|
|
|
/*
|
|
* We have run out of credits when mi_credits is <= MSCP_MINCREDITS.
|
|
* It is still possible to issue one command in this case, but it must
|
|
* not be a data transfer. E.g., `get command status' or `abort command'
|
|
* is legal, while `read' is not.
|
|
*/
|
|
#define MSCP_MINCREDITS 1
|
|
|
|
/*
|
|
* Flags for mscp_getcp().
|
|
*/
|
|
#define MSCP_WAIT 1
|
|
#define MSCP_DONTWAIT 0
|
|
|
|
/* get a command packet */
|
|
|
|
/*
|
|
* Unit flags
|
|
*/
|
|
#define UNIT_ONLINE 0x01 /* drive is on line */
|
|
#define UNIT_HAVESTATUS 0x02 /* got unit status */
|
|
#define UNIT_REQUEUE 0x04 /* requeue after response */
|
|
|
|
/*
|
|
* Handle a command ring transition: wake up sleepers for command packets.
|
|
* This is too simple to bother with a function call.
|
|
*/
|
|
#define MSCP_DOCMD(mi) { \
|
|
if ((mi)->mi_wantcmd) { \
|
|
(mi)->mi_wantcmd = 0; \
|
|
wakeup((caddr_t) &(mi)->mi_wantcmd); \
|
|
} \
|
|
}
|
|
|
|
/* Prototypes */
|
|
struct mscp *mscp_getcp __P((struct mscp_softc *, int));
|
|
void mscp_printevent __P((struct mscp *));
|
|
void mscp_go __P((struct mscp_softc *, struct mscp *, int));
|
|
void mscp_requeue __P((struct mscp_softc *));
|
|
void mscp_dorsp __P((struct mscp_softc *));
|
|
int mscp_decodeerror __P((char *, struct mscp *, struct mscp_softc *));
|
|
int mscp_print __P((void *, const char *));
|
|
void mscp_hexdump __P((struct mscp *));
|
|
void mscp_strategy __P((struct buf *, struct device *));
|
|
void mscp_printtype __P((int, int));
|
|
int mscp_waitstep __P((struct mscp_softc *, int, int));
|
|
void mscp_dgo __P((struct mscp_softc *, struct mscp_xi *));
|
|
void mscp_intr __P((struct mscp_softc *));
|