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Implement DIOCCACHESYNC for SCSI/ATAPI cd/mmc recordable devices found by 

scsipi/cd.c by issueing the SYNCHRONISE CACHES scsi/atapi call as defined
per MMC standard.
This commit is contained in:
reinoud 2005-09-05 21:16:24 +00:00
parent 9c2d1acf94
commit d462489ea5
1 changed files with 28 additions and 2 deletions
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30
sys/dev/scsipi/cd.c
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@ -1,4 +1,4 @@
/* $NetBSD: cd.c,v 1.225 2005/08/28 22:51:01 reinoud Exp $ */
/* $NetBSD: cd.c,v 1.226 2005/09/05 21:16:24 reinoud Exp $ */
/*-
* Copyright (c) 1998, 2001, 2003, 2004 The NetBSD Foundation, Inc.
@ -54,7 +54,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cd.c,v 1.225 2005/08/28 22:51:01 reinoud Exp $");
__KERNEL_RCSID(0, "$NetBSD: cd.c,v 1.226 2005/09/05 21:16:24 reinoud Exp $");
#include "rnd.h"
@ -1119,6 +1119,28 @@ cdreadmsaddr(struct cd_softc *cd, int *addr)
return 0;
}
/* synchronise caches code from sd.c, move to scsipi_ioctl.c ? */
static int
cdcachesync(struct scsipi_periph *periph, int flags) {
struct scsi_synchronize_cache_10 cmd;
/*
* Issue a SYNCHRONIZE CACHE. MMC devices have to issue with address 0
* and length 0 as it can't synchronise parts of the disc per spec.
* We ignore ILLEGAL REQUEST in the event that the command is not
* supported by the device, and poll for completion so that we know
* that the cache has actually been flushed.
*
* XXX should we handle the PQUIRK_NOSYNCCACHE ?
*/
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = SCSI_SYNCHRONIZE_CACHE_10;
return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0,
CDRETRIES, 30000, NULL, flags | XS_CTL_IGNORE_ILLEGAL_REQUEST));
}
/*
* Perform special action on behalf of the user.
* Knows about the internals of this device
@ -1146,6 +1168,7 @@ cdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
case DIOCLOCK:
case ODIOCEJECT:
case DIOCEJECT:
case DIOCCACHESYNC:
case SCIOCIDENTIFY:
case OSCIOCIDENTIFY:
case SCIOCCOMMAND:
@ -1454,6 +1477,9 @@ bad:
case CDIOCEJECT: /* FALLTHROUGH */
case ODIOCEJECT:
return (scsipi_start(periph, SSS_STOP|SSS_LOEJ, 0));
case DIOCCACHESYNC:
/* SYNCHRONISE CACHES command */
return (cdcachesync(periph, 0));
case CDIOCALLOW:
return (scsipi_prevent(periph, SPAMR_ALLOW, 0));
case CDIOCPREVENT: