Fix ATAPI/USB/Firewire CDROM drive handling in cd(4) and hopefully fix

a number of related problems along the way.

 - Automatically detect CDROM drives that can't handle 6 byte mode
   sense and mode select, and adjust our command size accordingly.
   We have to handle this in the cd(4) driver (where the buffers are
   allocated), since the parameter list length is different for the
   6 and 10 byte mode sense commands.

 - Remove MODE_SENSE and MODE_SELECT translation removed in ATAPICAM
   and in the umass(4) driver, since there's no way for that to work
   properly.

 - Add a quirk entry for CDROM drives that just hang when they get a 6
   byte mode sense or mode select.  The reason for the quirk must be
   documented in a PR, and all quirks must be approved by
   ken@FreeBSD.org.  This is to make sure that we fully understand why
   each quirk is needed.  Once the CAM_NEW_TRAN_CODE is finished, we
   should be able to remove any such quirks, since we'll know what
   protocol the drive speaks (SCSI, ATAPI, etc.) and therefore whether
   we should use 6 or 10 byte mode sense/select commands.

 - Change the way the da(4) handles the no_6_byte sysctl.  There is
   now a per-drive sysctl to set the minimum command size for that
   particular disk.  (Since you could have multiple disks with
   multiple requirements in one system.)

 - Loader tunable support for all the sysctls in the da(4) and cd(4)
   drivers.

 - Add a CDIOCCLOSE ioctl for cd(4) (bde pointed this out a long
   time ago).

 - Add a media validation routine (cdcheckmedia()) to the cd(4)
   driver, to fix some problems bde pointed out a long time ago.  We
   now allow open() to succeed no matter what, but if we don't detect
   valid media, the user can only issue CDIOCCLOSE or CDIOCEJECT
   ioctls.

 - The media validation routine also reads the table of contents off
   the drive.  We use the table of contents to implement the
   CDIOCPLAYTRACKS ioctl using the PLAY AUDIO MSF command.  The
   PLAY AUDIO TRACK INDEX command that we previously used was
   deprecated after SCSI-2.  It works in every SCSI CDROM I've tried,
   but doesn't seem to work on ATAPI CDROM drives.  We still use the
   play audio track index command if we don't have a valid TOC, but
   I suppose it'll fail anyway in that case.

 - Add _len() versions of scsi_mode_sense() and scsi_mode_select() so
   that we can specify the minimum command length.

 - Fix a couple of formatting problems in the sense printing code.

MFC after: 	4 weeks

1 files changed, 54 insertions, 31 deletions

diff --git a/sys/cam/scsi/scsi_cd.h b/sys/cam/scsi/scsi_cd.h
index f242139..f502d66 100644
--- a/sys/cam/scsi/scsi_cd.h
+++ b/sys/cam/scsi/scsi_cd.h
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2000 Kenneth D. Merry
+ * Copyright (c) 2000, 2002 Kenneth D. Merry
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -655,38 +655,47 @@ struct scsi_read_cd_cap_data
 	u_int8_t length_0;	/* Least significant */
 };
 
-union	cd_pages
+struct cd_audio_page
 {
-	struct	audio_page
+	u_int8_t page_code;
+#define	CD_PAGE_CODE		0x3F
+#define	AUDIO_PAGE		0x0e
+#define	CD_PAGE_PS		0x80
+	u_int8_t param_len;
+	u_int8_t flags;
+#define	CD_PA_SOTC		0x02
+#define	CD_PA_IMMED		0x04
+	u_int8_t unused[2];
+	u_int8_t format_lba;
+#define	CD_PA_FORMAT_LBA	0x0F
+#define	CD_PA_APR_VALID		0x80
+	u_int8_t lb_per_sec[2];
+	struct	port_control
 	{
-		u_int8_t page_code;
-#define	CD_PAGE_CODE	0x3F
-#define	AUDIO_PAGE	0x0e
-#define	CD_PAGE_PS	0x80
-		u_int8_t param_len;
-		u_int8_t flags;
-#define		CD_PA_SOTC	0x02
-#define		CD_PA_IMMED	0x04
-		u_int8_t unused[2];
-		u_int8_t format_lba;
-#define		CD_PA_FORMAT_LBA	0x0F
-#define		CD_PA_APR_VALID	0x80
-		u_int8_t lb_per_sec[2];
-		struct	port_control
-		{
-			u_int8_t channels;
-#define	CHANNEL 0x0F
-#define	CHANNEL_0 1
-#define	CHANNEL_1 2
-#define	CHANNEL_2 4
-#define	CHANNEL_3 8
-#define	LEFT_CHANNEL	CHANNEL_0
-#define	RIGHT_CHANNEL	CHANNEL_1
-			u_int8_t volume;
-		} port[4];
-#define	LEFT_PORT	0
-#define	RIGHT_PORT	1
-	}audio;
+		u_int8_t channels;
+#define	CHANNEL			0x0F
+#define	CHANNEL_0		1
+#define	CHANNEL_1		2
+#define	CHANNEL_2		4
+#define	CHANNEL_3		8
+#define	LEFT_CHANNEL		CHANNEL_0
+#define	RIGHT_CHANNEL		CHANNEL_1
+		u_int8_t volume;
+	} port[4];
+#define	LEFT_PORT		0
+#define	RIGHT_PORT		1
+};
+
+union cd_pages
+{
+	struct cd_audio_page audio;
+};
+
+struct cd_mode_data_10
+{
+	struct scsi_mode_header_10 header;
+	struct scsi_mode_blk_desc  blk_desc;
+	union cd_pages page;
 };
 
 struct cd_mode_data
@@ -696,6 +705,20 @@ struct cd_mode_data
 	union cd_pages page;
 };
 
+union cd_mode_data_6_10
+{
+	struct cd_mode_data mode_data_6;
+	struct cd_mode_data_10 mode_data_10;
+};
+
+struct cd_mode_params
+{
+	STAILQ_ENTRY(cd_mode_params)	links;
+	int				cdb_size;
+	int				alloc_len;
+	u_int8_t			*mode_buf;
+};
+
 __BEGIN_DECLS
 void scsi_report_key(struct ccb_scsiio *csio, u_int32_t retries,
 		     void (*cbfcnp)(struct cam_periph *, union ccb *),