From 5d3cbbbf16d2126d13baf2fa3e0d5edf4386f7e6 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 22 Jul 1995 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1995-07-22

---
 pc/scsi.c    | 55 ++++++++++++++++++++++++++++++++++++++++++++++++----
 port/devsd.c |  6 ++++--
 2 files changed, 55 insertions(+), 6 deletions(-)

diff --git a/pc/scsi.c b/pc/scsi.c
index dac848788ebb520dd12646bcf060cf63a96456bc..3e867eeeabe99a7c77e9c840ca808ba58c63cfc6 100644
--- a/pc/scsi.c
+++ b/pc/scsi.c
@@ -7,7 +7,8 @@
 #include "ureg.h"
 #include "../port/error.h"
 
-enum {
+enum
+{
 	Ninq		= 255,
 	Nscratch	= 255,
 
@@ -21,7 +22,8 @@ enum {
 	CMDwrite10	= 0x2A,
 };
 
-typedef struct {
+typedef struct
+{
 	ISAConf;
 	Scsiio	io;
 
@@ -31,7 +33,8 @@ typedef struct {
 static Ctlr *scsi[MaxScsi];
 
 typedef struct Link Link;
-typedef struct Link {
+typedef struct Link
+{
 	char	*type;
 	Scsiio	(*reset)(int, ISAConf*);
 
@@ -231,7 +234,7 @@ scsistart(Target *t, char lun, int s)
 	memset(cmd, 0, sizeof cmd);
 	cmd[0] = CMDstart;
 	cmd[1] = lun<<5;
-	cmd[4] = s ? 1 : 0;
+	cmd[4] = s? 1: 0;
 	return scsiexec(t, SCSIread, cmd, sizeof(cmd), 0, 0);
 }
 
@@ -388,3 +391,47 @@ scsireqsense(Target *t, char lun, void *data, int *nbytes, int quiet)
 	return STcheck;
 }
 
+int
+scsidiskinfo(Target *t, char lun, uchar *data)
+{
+	int s, nbytes, try;
+	uchar cmd[10];
+
+	for(try=0; try<3; try++) {
+
+		nbytes = 4;
+
+		memset(cmd, 0, sizeof(cmd));
+		cmd[0] = 0x43;
+		cmd[1] = lun<<5;
+		cmd[7] = nbytes>>8;
+		cmd[8] = nbytes>>0;
+
+		s = scsiexec(t, SCSIread, cmd, sizeof(cmd), data, &nbytes);
+		if(s == STok)
+			break;
+
+		nbytes = Nscratch;
+		scsireqsense(t, lun, t->scratch, &nbytes, 0);
+	}
+	return s;
+}
+
+int
+scsitrackinfo(Target *t, char lun, int track, uchar *data)
+{
+	int s, nbytes;
+	uchar cmd[10];
+
+	nbytes = 12;
+
+	memset(cmd, 0, sizeof(cmd));
+	cmd[0] = 0xe5;
+	cmd[1] = lun<<5;
+	cmd[5] = track;
+	cmd[7] = nbytes>>8;
+	cmd[8] = nbytes>>0;
+
+	s = scsiexec(t, SCSIread, cmd, sizeof(cmd), data, &nbytes);
+	return s;
+}
diff --git a/port/devsd.c b/port/devsd.c
index 07e5c6ac9b4baa9b620d21a9118ca76162c69f57..b9b43c8b6d1d24f11b9806ed5e5d9f223573f82d 100644
--- a/port/devsd.c
+++ b/port/devsd.c
@@ -9,7 +9,8 @@
 #include	"../port/error.h"
 #include	"devtab.h"
 
-enum {
+enum
+{
 	TypeDA		= 0x00,		/* Direct Access */
 	TypeSA		= 0x01,		/* Sequential Access */
 	TypeWO		= 0x04,		/* Worm */
@@ -60,7 +61,8 @@ Disk	disk[Ndisk];
 static	void	sdrdpart(Disk*);
 static	long	sdio(Chan*, int, char*, ulong, ulong);
 
-static int types[] = {
+static int types[] =
+{
 	TypeDA, TypeCD, TypeMO,
 	-1,
 };