Rename this driver `md'.
This commit is contained in:
pk
parent
1c0c346e1d
commit
1cfdb29905
266
sys/dev/md.c
266
sys/dev/md.c
@ -1,4 +1,4 @@
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/* $NetBSD: md.c,v 1.10 1996/10/13 01:37:07 christos Exp $ */
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/* $NetBSD: md.c,v 1.11 1996/12/28 23:09:26 pk Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross, Leo Weppelman.
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@ -32,7 +32,7 @@
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*/
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/*
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* This implements a general-puspose RAM-disk.
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* This implements a general-purpose memory-disk.
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* See ramdisk.h for notes on the config types.
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*
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* Note that this driver provides the same functionality
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@ -41,7 +41,7 @@
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*
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* Credit for most of the kmem ramdisk code goes to:
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* Leo Weppelman (atari) and Phil Nelson (pc532)
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* Credit for the ideas behind the "user space RAM" code goes
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* Credit for the ideas behind the "user space memory" code goes
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* to the authors of the MFS implementation.
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*/
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@ -57,17 +57,16 @@
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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/* Don't want all those other VM headers... */
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extern vm_offset_t kmem_alloc __P((vm_map_t, vm_size_t));
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#include <vm/vm_extern.h>
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#include <dev/ramdisk.h>
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#include <dev/md.h>
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/*
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* By default, include the user-space functionality.
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* Use: option RAMDISK_SERVER=0 to turn it off.
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* Use `options MEMORY_DISK_SERVER=0' to turn it off.
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*/
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#ifndef RAMDISK_SERVER
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#define RAMDISK_SERVER 1
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#ifndef MEMORY_DISK_SERVER
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#define MEMORY_DISK_SERVER 1
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#endif
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/*
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@ -76,56 +75,56 @@ extern vm_offset_t kmem_alloc __P((vm_map_t, vm_size_t));
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* that interferes with the security stuff preventing
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* simulatneous use of raw and block devices.
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*
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* XXX Assumption: 16 RAM-disks are enough!
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* XXX Assumption: 16 memory-disks are enough!
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*/
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#define RD_MAX_UNITS 0x10
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#define RD_IS_CTRL(unit) (unit & 0x10)
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#define RD_UNIT(unit) (unit & 0xF)
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#define MD_MAX_UNITS 0x10
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#define MD_IS_CTRL(unit) (unit & 0x10)
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#define MD_UNIT(unit) (unit & 0xF)
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/* autoconfig stuff... */
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struct rd_softc {
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struct md_softc {
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struct device sc_dev; /* REQUIRED first entry */
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struct disk sc_dkdev; /* hook for generic disk handling */
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struct rd_conf sc_rd;
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struct md_conf sc_md;
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struct buf *sc_buflist;
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int sc_flags;
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};
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/* shorthand for fields in sc_rd: */
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#define sc_addr sc_rd.rd_addr
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#define sc_size sc_rd.rd_size
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#define sc_type sc_rd.rd_type
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/* shorthand for fields in sc_md: */
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#define sc_addr sc_md.md_addr
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#define sc_size sc_md.md_size
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#define sc_type sc_md.md_type
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/* flags */
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#define RD_ISOPEN 0x01
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#define RD_SERVED 0x02
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#define MD_ISOPEN 0x01
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#define MD_SERVED 0x02
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void rdattach __P((int));
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static void rd_attach __P((struct device *, struct device *, void *));
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void mdattach __P((int));
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static void md_attach __P((struct device *, struct device *, void *));
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/*
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* Some ports (like i386) use a swapgeneric that wants to
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* snoop around in this rd_cd structure. It is preserved
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* snoop around in this md_cd structure. It is preserved
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* (for now) to remain compatible with such practice.
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* XXX - that practice is questionable...
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*/
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struct cfdriver rd_cd = {
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NULL, "rd", DV_DULL, NULL, 0
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struct cfdriver md_cd = {
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NULL, "md", DV_DULL, NULL, 0
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};
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void rdstrategy __P((struct buf *bp));
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struct dkdriver rddkdriver = { rdstrategy };
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void mdstrategy __P((struct buf *bp));
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struct dkdriver mddkdriver = { mdstrategy };
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static int ramdisk_ndevs;
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static void *ramdisk_devs[RD_MAX_UNITS];
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static void *ramdisk_devs[MD_MAX_UNITS];
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/*
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* This is called if we are configured as a pseudo-device
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*/
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void
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rdattach(n)
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mdattach(n)
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int n;
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{
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struct rd_softc *sc;
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struct md_softc *sc;
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int i;
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#ifdef DIAGNOSTIC
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@ -138,13 +137,13 @@ rdattach(n)
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/* XXX: Are we supposed to provide a default? */
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if (n <= 1)
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n = 1;
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if (n > RD_MAX_UNITS)
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n = RD_MAX_UNITS;
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if (n > MD_MAX_UNITS)
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n = MD_MAX_UNITS;
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ramdisk_ndevs = n;
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/* XXX: Fake-up rd_cd (see above) */
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rd_cd.cd_ndevs = ramdisk_ndevs;
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rd_cd.cd_devs = ramdisk_devs;
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/* XXX: Fake-up md_cd (see above) */
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md_cd.cd_ndevs = ramdisk_ndevs;
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md_cd.cd_devs = ramdisk_devs;
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/* Attach as if by autoconfig. */
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for (i = 0; i < n; i++) {
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@ -157,32 +156,32 @@ rdattach(n)
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bzero((caddr_t)sc, sizeof(*sc));
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ramdisk_devs[i] = sc;
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sc->sc_dev.dv_unit = i;
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sprintf(sc->sc_dev.dv_xname, "rd%d", i);
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rd_attach(NULL, &sc->sc_dev, NULL);
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sprintf(sc->sc_dev.dv_xname, "md%d", i);
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md_attach(NULL, &sc->sc_dev, NULL);
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}
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}
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static void
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rd_attach(parent, self, aux)
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md_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct rd_softc *sc = (struct rd_softc *)self;
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struct md_softc *sc = (struct md_softc *)self;
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/* XXX - Could accept aux info here to set the config. */
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#ifdef RAMDISK_HOOKS
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#ifdef MEMORY_DISK_HOOKS
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/*
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* This external function might setup a pre-loaded disk.
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* All it would need to do is setup the rd_conf struct.
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* See sys/arch/sun3/dev/rd_root.c for an example.
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* All it would need to do is setup the md_conf struct.
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* See sys/arch/sun3/dev/md_root.c for an example.
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*/
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rd_attach_hook(sc->sc_dev.dv_unit, &sc->sc_rd);
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md_attach_hook(sc->sc_dev.dv_unit, &sc->sc_md);
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#endif
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/*
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* Initialize and attach the disk structure.
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*/
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sc->sc_dkdev.dk_driver = &rddkdriver;
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sc->sc_dkdev.dk_driver = &mddkdriver;
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sc->sc_dkdev.dk_name = sc->sc_dev.dv_xname;
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disk_attach(&sc->sc_dkdev);
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}
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@ -193,23 +192,23 @@ rd_attach(parent, self, aux)
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* ioctl, dump, size
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*/
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#if RAMDISK_SERVER
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static int rd_server_loop __P((struct rd_softc *sc));
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static int rd_ioctl_server __P((struct rd_softc *sc,
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struct rd_conf *urd, struct proc *proc));
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#if MEMORY_DISK_SERVER
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static int md_server_loop __P((struct md_softc *sc));
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static int md_ioctl_server __P((struct md_softc *sc,
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struct md_conf *umd, struct proc *proc));
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#endif
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static int rd_ioctl_kalloc __P((struct rd_softc *sc,
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struct rd_conf *urd, struct proc *proc));
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static int md_ioctl_kalloc __P((struct md_softc *sc,
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struct md_conf *umd, struct proc *proc));
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dev_type_open(rdopen);
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dev_type_close(rdclose);
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dev_type_read(rdread);
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dev_type_write(rdwrite);
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dev_type_ioctl(rdioctl);
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dev_type_size(rdsize);
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dev_type_dump(rddump);
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dev_type_open(mdopen);
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dev_type_close(mdclose);
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dev_type_read(mdread);
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dev_type_write(mdwrite);
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dev_type_ioctl(mdioctl);
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dev_type_size(mdsize);
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dev_type_dump(mddump);
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int rddump(dev, blkno, va, size)
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int mddump(dev, blkno, va, size)
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dev_t dev;
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daddr_t blkno;
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caddr_t va;
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@ -218,10 +217,10 @@ int rddump(dev, blkno, va, size)
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return ENODEV;
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}
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int rdsize(dev_t dev)
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int mdsize(dev_t dev)
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{
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int unit;
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struct rd_softc *sc;
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struct md_softc *sc;
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/* Disallow control units. */
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unit = minor(dev);
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@ -231,23 +230,23 @@ int rdsize(dev_t dev)
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if (sc == NULL)
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return 0;
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if (sc->sc_type == RD_UNCONFIGURED)
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if (sc->sc_type == MD_UNCONFIGURED)
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return 0;
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return (sc->sc_size >> DEV_BSHIFT);
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}
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int
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rdopen(dev, flag, fmt, proc)
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mdopen(dev, flag, fmt, proc)
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dev_t dev;
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int flag, fmt;
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struct proc *proc;
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{
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int md, unit;
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struct rd_softc *sc;
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struct md_softc *sc;
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md = minor(dev);
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unit = RD_UNIT(md);
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unit = MD_UNIT(md);
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if (unit >= ramdisk_ndevs)
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return ENXIO;
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sc = ramdisk_devs[unit];
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@ -258,40 +257,40 @@ rdopen(dev, flag, fmt, proc)
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* The control device is not exclusive, and can
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* open uninitialized units (so you can setconf).
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*/
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if (RD_IS_CTRL(md))
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if (MD_IS_CTRL(md))
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return 0;
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#ifdef RAMDISK_HOOKS
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#ifdef MEMORY_DISK_HOOKS
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/* Call the open hook to allow loading the device. */
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rd_open_hook(unit, &sc->sc_rd);
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md_open_hook(unit, &sc->sc_md);
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#endif
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/*
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* This is a normal, "slave" device, so
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* enforce initialized, exclusive open.
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*/
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if (sc->sc_type == RD_UNCONFIGURED)
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if (sc->sc_type == MD_UNCONFIGURED)
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return ENXIO;
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if (sc->sc_flags & RD_ISOPEN)
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if (sc->sc_flags & MD_ISOPEN)
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return EBUSY;
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return 0;
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}
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int
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rdclose(dev, flag, fmt, proc)
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mdclose(dev, flag, fmt, proc)
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dev_t dev;
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int flag, fmt;
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struct proc *proc;
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{
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int md, unit;
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struct rd_softc *sc;
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struct md_softc *sc;
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md = minor(dev);
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unit = RD_UNIT(md);
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unit = MD_UNIT(md);
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sc = ramdisk_devs[unit];
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if (RD_IS_CTRL(md))
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if (MD_IS_CTRL(md))
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return 0;
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/* Normal device. */
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@ -301,21 +300,21 @@ rdclose(dev, flag, fmt, proc)
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}
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int
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rdread(dev, uio, flags)
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mdread(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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return (physio(rdstrategy, NULL, dev, B_READ, minphys, uio));
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return (physio(mdstrategy, NULL, dev, B_READ, minphys, uio));
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}
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int
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rdwrite(dev, uio, flags)
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mdwrite(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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return (physio(rdstrategy, NULL, dev, B_WRITE, minphys, uio));
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return (physio(mdstrategy, NULL, dev, B_WRITE, minphys, uio));
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}
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/*
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@ -323,35 +322,35 @@ rdwrite(dev, uio, flags)
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* by passing them to the server process.
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*/
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void
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rdstrategy(bp)
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mdstrategy(bp)
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struct buf *bp;
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{
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int md, unit;
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struct rd_softc *sc;
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caddr_t addr;
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size_t off, xfer;
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int md, unit;
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struct md_softc *sc;
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caddr_t addr;
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size_t off, xfer;
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md = minor(bp->b_dev);
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unit = RD_UNIT(md);
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unit = MD_UNIT(md);
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sc = ramdisk_devs[unit];
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switch (sc->sc_type) {
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#if RAMDISK_SERVER
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case RD_UMEM_SERVER:
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#if MEMORY_DISK_SERVER
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case MD_UMEM_SERVER:
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/* Just add this job to the server's queue. */
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bp->b_actf = sc->sc_buflist;
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sc->sc_buflist = bp;
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if (bp->b_actf == NULL) {
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/* server queue was empty. */
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wakeup((caddr_t)sc);
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/* see rd_server_loop() */
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/* see md_server_loop() */
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}
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/* no biodone in this case */
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return;
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#endif /* RAMDISK_SERVER */
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#endif /* MEMORY_DISK_SERVER */
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case RD_KMEM_FIXED:
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case RD_KMEM_ALLOCATED:
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case MD_KMEM_FIXED:
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case MD_KMEM_ALLOCATED:
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/* These are in kernel space. Access directly. */
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bp->b_resid = bp->b_bcount;
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off = (bp->b_blkno << DEV_BSHIFT);
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@ -382,41 +381,41 @@ rdstrategy(bp)
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}
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int
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rdioctl(dev, cmd, data, flag, proc)
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dev_t dev;
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u_long cmd;
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mdioctl(dev, cmd, data, flag, proc)
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dev_t dev;
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u_long cmd;
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int flag;
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caddr_t data;
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caddr_t data;
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struct proc *proc;
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{
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int md, unit;
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struct rd_softc *sc;
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struct rd_conf *urd;
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int md, unit;
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struct md_softc *sc;
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struct md_conf *umd;
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md = minor(dev);
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unit = RD_UNIT(md);
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unit = MD_UNIT(md);
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sc = ramdisk_devs[unit];
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/* If this is not the control device, punt! */
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if (RD_IS_CTRL(md) == 0)
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if (MD_IS_CTRL(md) == 0)
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return ENOTTY;
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urd = (struct rd_conf *)data;
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umd = (struct md_conf *)data;
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switch (cmd) {
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case RD_GETCONF:
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*urd = sc->sc_rd;
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case MD_GETCONF:
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*umd = sc->sc_md;
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return 0;
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case RD_SETCONF:
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case MD_SETCONF:
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/* Can only set it once. */
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if (sc->sc_type != RD_UNCONFIGURED)
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if (sc->sc_type != MD_UNCONFIGURED)
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break;
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switch (urd->rd_type) {
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case RD_KMEM_ALLOCATED:
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return rd_ioctl_kalloc(sc, urd, proc);
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#if RAMDISK_SERVER
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case RD_UMEM_SERVER:
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return rd_ioctl_server(sc, urd, proc);
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switch (umd->md_type) {
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case MD_KMEM_ALLOCATED:
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return md_ioctl_kalloc(sc, umd, proc);
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#if MEMORY_DISK_SERVER
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case MD_UMEM_SERVER:
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return md_ioctl_server(sc, umd, proc);
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#endif
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default:
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break;
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@ -427,20 +426,20 @@ rdioctl(dev, cmd, data, flag, proc)
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}
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/*
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* Handle ioctl RD_SETCONF for (sc_type == RD_KMEM_ALLOCATED)
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* Handle ioctl MD_SETCONF for (sc_type == MD_KMEM_ALLOCATED)
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* Just allocate some kernel memory and return.
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*/
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static int
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rd_ioctl_kalloc(sc, urd, proc)
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struct rd_softc *sc;
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struct rd_conf *urd;
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md_ioctl_kalloc(sc, umd, proc)
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struct md_softc *sc;
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struct md_conf *umd;
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struct proc *proc;
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{
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vm_offset_t addr;
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vm_size_t size;
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/* Sanity check the size. */
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size = urd->rd_size;
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size = umd->md_size;
|
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addr = kmem_alloc(kernel_map, size);
|
||||
if (!addr)
|
||||
return ENOMEM;
|
||||
@ -448,53 +447,53 @@ rd_ioctl_kalloc(sc, urd, proc)
|
||||
/* This unit is now configured. */
|
||||
sc->sc_addr = (caddr_t)addr; /* kernel space */
|
||||
sc->sc_size = (size_t)size;
|
||||
sc->sc_type = RD_KMEM_ALLOCATED;
|
||||
sc->sc_type = MD_KMEM_ALLOCATED;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if RAMDISK_SERVER
|
||||
#if MEMORY_DISK_SERVER
|
||||
|
||||
/*
|
||||
* Handle ioctl RD_SETCONF for (sc_type == RD_UMEM_SERVER)
|
||||
* Handle ioctl MD_SETCONF for (sc_type == MD_UMEM_SERVER)
|
||||
* Set config, then become the I/O server for this unit.
|
||||
*/
|
||||
static int
|
||||
rd_ioctl_server(sc, urd, proc)
|
||||
struct rd_softc *sc;
|
||||
struct rd_conf *urd;
|
||||
md_ioctl_server(sc, umd, proc)
|
||||
struct md_softc *sc;
|
||||
struct md_conf *umd;
|
||||
struct proc *proc;
|
||||
{
|
||||
vm_offset_t end;
|
||||
int error;
|
||||
|
||||
/* Sanity check addr, size. */
|
||||
end = (vm_offset_t) (urd->rd_addr + urd->rd_size);
|
||||
end = (vm_offset_t) (umd->md_addr + umd->md_size);
|
||||
|
||||
if ((end >= VM_MAXUSER_ADDRESS) ||
|
||||
(end < ((vm_offset_t) urd->rd_addr)) )
|
||||
(end < ((vm_offset_t) umd->md_addr)) )
|
||||
return EINVAL;
|
||||
|
||||
/* This unit is now configured. */
|
||||
sc->sc_addr = urd->rd_addr; /* user space */
|
||||
sc->sc_size = urd->rd_size;
|
||||
sc->sc_type = RD_UMEM_SERVER;
|
||||
sc->sc_addr = umd->md_addr; /* user space */
|
||||
sc->sc_size = umd->md_size;
|
||||
sc->sc_type = MD_UMEM_SERVER;
|
||||
|
||||
/* Become the server daemon */
|
||||
error = rd_server_loop(sc);
|
||||
error = md_server_loop(sc);
|
||||
|
||||
/* This server is now going away! */
|
||||
sc->sc_type = RD_UNCONFIGURED;
|
||||
sc->sc_type = MD_UNCONFIGURED;
|
||||
sc->sc_addr = 0;
|
||||
sc->sc_size = 0;
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
int rd_sleep_pri = PWAIT | PCATCH;
|
||||
int md_sleep_pri = PWAIT | PCATCH;
|
||||
|
||||
static int
|
||||
rd_server_loop(sc)
|
||||
struct rd_softc *sc;
|
||||
md_server_loop(sc)
|
||||
struct md_softc *sc;
|
||||
{
|
||||
struct buf *bp;
|
||||
caddr_t addr; /* user space address */
|
||||
@ -505,7 +504,7 @@ rd_server_loop(sc)
|
||||
for (;;) {
|
||||
/* Wait for some work to arrive. */
|
||||
while (sc->sc_buflist == NULL) {
|
||||
error = tsleep((caddr_t)sc, rd_sleep_pri, "rd_idle", 0);
|
||||
error = tsleep((caddr_t)sc, md_sleep_pri, "md_idle", 0);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
@ -544,5 +543,4 @@ rd_server_loop(sc)
|
||||
biodone(bp);
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* RAMDISK_SERVER */
|
||||
#endif /* MEMORY_DISK_SERVER */
|
||||
|
||||
38
sys/dev/md.h
38
sys/dev/md.h
@ -1,4 +1,4 @@
|
||||
/* $NetBSD: md.h,v 1.4 1996/03/22 23:02:04 gwr Exp $ */
|
||||
/* $NetBSD: md.h,v 1.5 1996/12/28 23:09:27 pk Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1995 Gordon W. Ross
|
||||
@ -31,44 +31,44 @@
|
||||
*/
|
||||
|
||||
/*
|
||||
* RAM-disk ioctl functions:
|
||||
* Memory-disk ioctl functions:
|
||||
*/
|
||||
|
||||
#include <sys/ioccom.h>
|
||||
|
||||
struct rd_conf {
|
||||
caddr_t rd_addr;
|
||||
size_t rd_size;
|
||||
int rd_type;
|
||||
struct md_conf {
|
||||
caddr_t md_addr;
|
||||
size_t md_size;
|
||||
int md_type;
|
||||
};
|
||||
|
||||
#define RD_GETCONF _IOR('r', 0, struct rd_conf) /* get unit config */
|
||||
#define RD_SETCONF _IOW('r', 1, struct rd_conf) /* set unit config */
|
||||
#define MD_GETCONF _IOR('r', 0, struct md_conf) /* get unit config */
|
||||
#define MD_SETCONF _IOW('r', 1, struct md_conf) /* set unit config */
|
||||
|
||||
/*
|
||||
* There are three configurations supported for each unit,
|
||||
* reflected in the value of the rd_type field:
|
||||
* reflected in the value of the md_type field:
|
||||
*/
|
||||
#define RD_UNCONFIGURED 0
|
||||
#define MD_UNCONFIGURED 0
|
||||
/*
|
||||
* Not yet configured. Open returns ENXIO.
|
||||
*/
|
||||
#define RD_KMEM_FIXED 1
|
||||
#define MD_KMEM_FIXED 1
|
||||
/*
|
||||
* Disk image resident in kernel (patched in or loaded).
|
||||
* Requires that the function: rd_set_kmem() is called to
|
||||
* Requires that the function: md_set_kmem() is called to
|
||||
* attach the (initialized) kernel memory to be used by the
|
||||
* device. It can be initialized by an "open hook" if this
|
||||
* driver is compiled with the RD_OPEN_HOOK option.
|
||||
* driver is compiled with the MD_OPEN_HOOK option.
|
||||
* No attempt will ever be made to free this memory.
|
||||
*/
|
||||
#define RD_KMEM_ALLOCATED 2
|
||||
#define MD_KMEM_ALLOCATED 2
|
||||
/*
|
||||
* Small, wired-down chunk of kernel memory obtained from
|
||||
* kmem_alloc(). The allocation is performed by an ioctl
|
||||
* call on the "control" unit (regular unit + 16)
|
||||
*/
|
||||
#define RD_UMEM_SERVER 3
|
||||
#define MD_UMEM_SERVER 3
|
||||
/*
|
||||
* Indirect access to user-space of a user-level server.
|
||||
* (Like the MFS hack, but better! 8^) Device operates
|
||||
@ -76,15 +76,15 @@ struct rd_conf {
|
||||
* continues to service I/O requests. The process that
|
||||
* does this setconf will become the I/O server. This
|
||||
* configuration type can be disabled using:
|
||||
* option RAMDISK_SERVER=0
|
||||
* options MEMORY_DISK_SERVER=0
|
||||
*/
|
||||
|
||||
#ifdef _KERNEL
|
||||
/*
|
||||
* If the option RAMDISK_HOOKS is on, then these functions are
|
||||
* If the option MEMORY_DISK_HOOKS is on, then these functions are
|
||||
* called by the ramdisk driver to allow machine-dependent to
|
||||
* match/configure and/or load each ramdisk unit.
|
||||
*/
|
||||
extern void rd_attach_hook __P((int unit, struct rd_conf *));
|
||||
extern void rd_open_hook __P((int unit, struct rd_conf *));
|
||||
extern void md_attach_hook __P((int unit, struct md_conf *));
|
||||
extern void md_open_hook __P((int unit, struct md_conf *));
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user