Header for generic SCSI interface

1 files changed, 59 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/scsi/sg.h b/sysdeps/unix/sysv/linux/scsi/sg.h
new file mode 100644
index 0000000000..c0a0c3a6d5
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+++ b/sysdeps/unix/sysv/linux/scsi/sg.h
@@ -0,0 +1,59 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/*
+   History:
+    Started: Aug 9 by Lawrence Foard (entropy@world.std.com), to allow user
+     process control of SCSI devices.
+    Development Sponsored by Killy Corp. NY NY
+*/
+
+#ifndef _SCSI_SG_H
+#define _SCSI_SG_H	1
+
+/* An SG device is accessed by writing "packets" to it, the replies
+   are then read using the read call.  The same header is used for
+   replies; ignore the reply_len field.  */
+
+struct sg_header
+ {
+   int pack_len;			/* length of incoming packet
+					   (including header).  */
+   int reply_len;			/* max length of expected reply.  */
+   int pack_id;				/* id number of packet.  */
+   int result;				/* 0==ok, otherwise error number.  */
+   unsigned int twelve_byte:1;		/* force 12 byte command length for
+					   group 6 & 7 commands.  */
+   unsigned int other_flags:31;		/* for future use.  */
+   unsigned char sense_buffer[16];	/* used only by reads. */
+   /* command follows then data for command.  */
+ };
+
+/* ioctl's */
+#define SG_SET_TIMEOUT 0x2201  /* set timeout *(int *)arg==timeout */
+#define SG_GET_TIMEOUT 0x2202  /* get timeout return timeout */
+
+#define SG_DEFAULT_TIMEOUT (60*HZ) /* 1 minute timeout */
+#define SG_DEFAULT_RETRIES 1
+
+#define SG_MAX_QUEUE 4 /* maximum outstanding request, arbitrary, may be
+			  changed if sufficient DMA buffer room available.  */
+
+#define SG_BIG_BUFF 32768
+
+#endif	/* scsi/sg.h */