Date:   Sat, 23 Apr 2022 20:37:01 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>, Jens Axboe <axboe@...nel.dk>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Christoph Hellwig <hch@....de>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: [PATCH] Documentation: drop more IDE boot options and ide-cd.rst

Drop ide-* command line options.
Drop cdrom/ide-cd.rst documentation.

Fixes: 898ee22c32be ("Drop Documentation/ide/")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Cc: Christoph Hellwig <hch@....de>
Cc: Phillip Potter <phil@...lpotter.co.uk>
Cc: Jonathan Corbet <corbet@....net>
Cc: linux-doc@...r.kernel.org
---
I missed a few things in dropping all IDE documentation.
Hopefully this is all of the remaining pieces.

 Documentation/admin-guide/kernel-parameters.txt |   20 
 Documentation/cdrom/ide-cd.rst                  |  538 --------------
 2 files changed, 558 deletions(-)

--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1797,26 +1797,6 @@
 	icn=		[HW,ISDN]
 			Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
 
-	ide-core.nodma=	[HW] (E)IDE subsystem
-			Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc
-			.vlb_clock .pci_clock .noflush .nohpa .noprobe .nowerr
-			.cdrom .chs .ignore_cable are additional options
-			See Documentation/ide/ide.rst.
-
-	ide-generic.probe-mask= [HW] (E)IDE subsystem
-			Format: <int>
-			Probe mask for legacy ISA IDE ports.  Depending on
-			platform up to 6 ports are supported, enabled by
-			setting corresponding bits in the mask to 1.  The
-			default value is 0x0, which has a special meaning.
-			On systems that have PCI, it triggers scanning the
-			PCI bus for the first and the second port, which
-			are then probed.  On systems without PCI the value
-			of 0x0 enables probing the two first ports as if it
-			was 0x3.
-
-	ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem
-			Claim all unknown PCI IDE storage controllers.
 
 	idle=		[X86]
 			Format: idle=poll, idle=halt, idle=nomwait
--- a/Documentation/cdrom/ide-cd.rst
+++ /dev/null
@@ -1,538 +0,0 @@
-IDE-CD driver documentation
-===========================
-
-:Originally by: scott snyder  <snyder@...ld0.fnal.gov> (19 May 1996)
-:Carrying on the torch is: Erik Andersen <andersee@...ian.org>
-:New maintainers (19 Oct 1998): Jens Axboe <axboe@...ge.dk>
-
-1. Introduction
----------------
-
-The ide-cd driver should work with all ATAPI ver 1.2 to ATAPI 2.6 compliant
-CDROM drives which attach to an IDE interface.  Note that some CDROM vendors
-(including Mitsumi, Sony, Creative, Aztech, and Goldstar) have made
-both ATAPI-compliant drives and drives which use a proprietary
-interface.  If your drive uses one of those proprietary interfaces,
-this driver will not work with it (but one of the other CDROM drivers
-probably will).  This driver will not work with `ATAPI` drives which
-attach to the parallel port.  In addition, there is at least one drive
-(CyCDROM CR520ie) which attaches to the IDE port but is not ATAPI;
-this driver will not work with drives like that either (but see the
-aztcd driver).
-
-This driver provides the following features:
-
- - Reading from data tracks, and mounting ISO 9660 filesystems.
-
- - Playing audio tracks.  Most of the CDROM player programs floating
-   around should work; I usually use Workman.
-
- - Multisession support.
-
- - On drives which support it, reading digital audio data directly
-   from audio tracks.  The program cdda2wav can be used for this.
-   Note, however, that only some drives actually support this.
-
- - There is now support for CDROM changers which comply with the
-   ATAPI 2.6 draft standard (such as the NEC CDR-251).  This additional
-   functionality includes a function call to query which slot is the
-   currently selected slot, a function call to query which slots contain
-   CDs, etc. A sample program which demonstrates this functionality is
-   appended to the end of this file.  The Sanyo 3-disc changer
-   (which does not conform to the standard) is also now supported.
-   Please note the driver refers to the first CD as slot # 0.
-
-
-2. Installation
----------------
-
-0. The ide-cd relies on the ide disk driver.  See
-   Documentation/ide/ide.rst for up-to-date information on the ide
-   driver.
-
-1. Make sure that the ide and ide-cd drivers are compiled into the
-   kernel you're using.  When configuring the kernel, in the section
-   entitled "Floppy, IDE, and other block devices", say either `Y`
-   (which will compile the support directly into the kernel) or `M`
-   (to compile support as a module which can be loaded and unloaded)
-   to the options::
-
-      ATA/ATAPI/MFM/RLL support
-      Include IDE/ATAPI CDROM support
-
-   Depending on what type of IDE interface you have, you may need to
-   specify additional configuration options.  See
-   Documentation/ide/ide.rst.
-
-2. You should also ensure that the iso9660 filesystem is either
-   compiled into the kernel or available as a loadable module.  You
-   can see if a filesystem is known to the kernel by catting
-   /proc/filesystems.
-
-3. The CDROM drive should be connected to the host on an IDE
-   interface.  Each interface on a system is defined by an I/O port
-   address and an IRQ number, the standard assignments being
-   0x1f0 and 14 for the primary interface and 0x170 and 15 for the
-   secondary interface.  Each interface can control up to two devices,
-   where each device can be a hard drive, a CDROM drive, a floppy drive,
-   or a tape drive.  The two devices on an interface are called `master`
-   and `slave`; this is usually selectable via a jumper on the drive.
-
-   Linux names these devices as follows.  The master and slave devices
-   on the primary IDE interface are called `hda` and `hdb`,
-   respectively.  The drives on the secondary interface are called
-   `hdc` and `hdd`.  (Interfaces at other locations get other letters
-   in the third position; see Documentation/ide/ide.rst.)
-
-   If you want your CDROM drive to be found automatically by the
-   driver, you should make sure your IDE interface uses either the
-   primary or secondary addresses mentioned above.  In addition, if
-   the CDROM drive is the only device on the IDE interface, it should
-   be jumpered as `master`.  (If for some reason you cannot configure
-   your system in this manner, you can probably still use the driver.
-   You may have to pass extra configuration information to the kernel
-   when you boot, however.  See Documentation/ide/ide.rst for more
-   information.)
-
-4. Boot the system.  If the drive is recognized, you should see a
-   message which looks like::
-
-     hdb: NEC CD-ROM DRIVE:260, ATAPI CDROM drive
-
-   If you do not see this, see section 5 below.
-
-5. You may want to create a symbolic link /dev/cdrom pointing to the
-   actual device.  You can do this with the command::
-
-     ln -s  /dev/hdX  /dev/cdrom
-
-   where X should be replaced by the letter indicating where your
-   drive is installed.
-
-6. You should be able to see any error messages from the driver with
-   the `dmesg` command.
-
-
-3. Basic usage
---------------
-
-An ISO 9660 CDROM can be mounted by putting the disc in the drive and
-typing (as root)::
-
-  mount -t iso9660 /dev/cdrom /mnt/cdrom
-
-where it is assumed that /dev/cdrom is a link pointing to the actual
-device (as described in step 5 of the last section) and /mnt/cdrom is
-an empty directory.  You should now be able to see the contents of the
-CDROM under the /mnt/cdrom directory.  If you want to eject the CDROM,
-you must first dismount it with a command like::
-
-  umount /mnt/cdrom
-
-Note that audio CDs cannot be mounted.
-
-Some distributions set up /etc/fstab to always try to mount a CDROM
-filesystem on bootup.  It is not required to mount the CDROM in this
-manner, though, and it may be a nuisance if you change CDROMs often.
-You should feel free to remove the cdrom line from /etc/fstab and
-mount CDROMs manually if that suits you better.
-
-Multisession and photocd discs should work with no special handling.
-The hpcdtoppm package (ftp.gwdg.de:/pub/linux/hpcdtoppm/) may be
-useful for reading photocds.
-
-To play an audio CD, you should first unmount and remove any data
-CDROM.  Any of the CDROM player programs should then work (workman,
-workbone, cdplayer, etc.).
-
-On a few drives, you can read digital audio directly using a program
-such as cdda2wav.  The only types of drive which I've heard support
-this are Sony and Toshiba drives.  You will get errors if you try to
-use this function on a drive which does not support it.
-
-For supported changers, you can use the `cdchange` program (appended to
-the end of this file) to switch between changer slots.  Note that the
-drive should be unmounted before attempting this.  The program takes
-two arguments:  the CDROM device, and the slot number to which you wish
-to change.  If the slot number is -1, the drive is unloaded.
-
-
-4. Common problems
-------------------
-
-This section discusses some common problems encountered when trying to
-use the driver, and some possible solutions.  Note that if you are
-experiencing problems, you should probably also review
-Documentation/ide/ide.rst for current information about the underlying
-IDE support code.  Some of these items apply only to earlier versions
-of the driver, but are mentioned here for completeness.
-
-In most cases, you should probably check with `dmesg` for any errors
-from the driver.
-
-a. Drive is not detected during booting.
-
-   - Review the configuration instructions above and in
-     Documentation/ide/ide.rst, and check how your hardware is
-     configured.
-
-   - If your drive is the only device on an IDE interface, it should
-     be jumpered as master, if at all possible.
-
-   - If your IDE interface is not at the standard addresses of 0x170
-     or 0x1f0, you'll need to explicitly inform the driver using a
-     lilo option.  See Documentation/ide/ide.rst.  (This feature was
-     added around kernel version 1.3.30.)
-
-   - If the autoprobing is not finding your drive, you can tell the
-     driver to assume that one exists by using a lilo option of the
-     form `hdX=cdrom`, where X is the drive letter corresponding to
-     where your drive is installed.  Note that if you do this and you
-     see a boot message like::
-
-       hdX: ATAPI cdrom (?)
-
-     this does _not_ mean that the driver has successfully detected
-     the drive; rather, it means that the driver has not detected a
-     drive, but is assuming there's one there anyway because you told
-     it so.  If you actually try to do I/O to a drive defined at a
-     nonexistent or nonresponding I/O address, you'll probably get
-     errors with a status value of 0xff.
-
-   - Some IDE adapters require a nonstandard initialization sequence
-     before they'll function properly.  (If this is the case, there
-     will often be a separate MS-DOS driver just for the controller.)
-     IDE interfaces on sound cards often fall into this category.
-
-     Support for some interfaces needing extra initialization is
-     provided in later 1.3.x kernels.  You may need to turn on
-     additional kernel configuration options to get them to work;
-     see Documentation/ide/ide.rst.
-
-     Even if support is not available for your interface, you may be
-     able to get it to work with the following procedure.  First boot
-     MS-DOS and load the appropriate drivers.  Then warm-boot linux
-     (i.e., without powering off).  If this works, it can be automated
-     by running loadlin from the MS-DOS autoexec.
-
-
-b. Timeout/IRQ errors.
-
-  - If you always get timeout errors, interrupts from the drive are
-    probably not making it to the host.
-
-  - IRQ problems may also be indicated by the message
-    `IRQ probe failed (<n>)` while booting.  If <n> is zero, that
-    means that the system did not see an interrupt from the drive when
-    it was expecting one (on any feasible IRQ).  If <n> is negative,
-    that means the system saw interrupts on multiple IRQ lines, when
-    it was expecting to receive just one from the CDROM drive.
-
-  - Double-check your hardware configuration to make sure that the IRQ
-    number of your IDE interface matches what the driver expects.
-    (The usual assignments are 14 for the primary (0x1f0) interface
-    and 15 for the secondary (0x170) interface.)  Also be sure that
-    you don't have some other hardware which might be conflicting with
-    the IRQ you're using.  Also check the BIOS setup for your system;
-    some have the ability to disable individual IRQ levels, and I've
-    had one report of a system which was shipped with IRQ 15 disabled
-    by default.
-
-  - Note that many MS-DOS CDROM drivers will still function even if
-    there are hardware problems with the interrupt setup; they
-    apparently don't use interrupts.
-
-  - If you own a Pioneer DR-A24X, you _will_ get nasty error messages
-    on boot such as "irq timeout: status=0x50 { DriveReady SeekComplete }"
-    The Pioneer DR-A24X CDROM drives are fairly popular these days.
-    Unfortunately, these drives seem to become very confused when we perform
-    the standard Linux ATA disk drive probe. If you own one of these drives,
-    you can bypass the ATA probing which confuses these CDROM drives, by
-    adding `append="hdX=noprobe hdX=cdrom"` to your lilo.conf file and running
-    lilo (again where X is the drive letter corresponding to where your drive
-    is installed.)
-
-c. System hangups.
-
-  - If the system locks up when you try to access the CDROM, the most
-    likely cause is that you have a buggy IDE adapter which doesn't
-    properly handle simultaneous transactions on multiple interfaces.
-    The most notorious of these is the CMD640B chip.  This problem can
-    be worked around by specifying the `serialize` option when
-    booting.  Recent kernels should be able to detect the need for
-    this automatically in most cases, but the detection is not
-    foolproof.  See Documentation/ide/ide.rst for more information
-    about the `serialize` option and the CMD640B.
-
-  - Note that many MS-DOS CDROM drivers will work with such buggy
-    hardware, apparently because they never attempt to overlap CDROM
-    operations with other disk activity.
-
-
-d. Can't mount a CDROM.
-
-  - If you get errors from mount, it may help to check `dmesg` to see
-    if there are any more specific errors from the driver or from the
-    filesystem.
-
-  - Make sure there's a CDROM loaded in the drive, and that's it's an
-    ISO 9660 disc.  You can't mount an audio CD.
-
-  - With the CDROM in the drive and unmounted, try something like::
-
-      cat /dev/cdrom | od | more
-
-    If you see a dump, then the drive and driver are probably working
-    OK, and the problem is at the filesystem level (i.e., the CDROM is
-    not ISO 9660 or has errors in the filesystem structure).
-
-  - If you see `not a block device` errors, check that the definitions
-    of the device special files are correct.  They should be as
-    follows::
-
-      brw-rw----   1 root     disk       3,   0 Nov 11 18:48 /dev/hda
-      brw-rw----   1 root     disk       3,  64 Nov 11 18:48 /dev/hdb
-      brw-rw----   1 root     disk      22,   0 Nov 11 18:48 /dev/hdc
-      brw-rw----   1 root     disk      22,  64 Nov 11 18:48 /dev/hdd
-
-    Some early Slackware releases had these defined incorrectly.  If
-    these are wrong, you can remake them by running the script
-    scripts/MAKEDEV.ide.  (You may have to make it executable
-    with chmod first.)
-
-    If you have a /dev/cdrom symbolic link, check that it is pointing
-    to the correct device file.
-
-    If you hear people talking of the devices `hd1a` and `hd1b`, these
-    were old names for what are now called hdc and hdd.  Those names
-    should be considered obsolete.
-
-  - If mount is complaining that the iso9660 filesystem is not
-    available, but you know it is (check /proc/filesystems), you
-    probably need a newer version of mount.  Early versions would not
-    always give meaningful error messages.
-
-
-e. Directory listings are unpredictably truncated, and `dmesg` shows
-   `buffer botch` error messages from the driver.
-
-  - There was a bug in the version of the driver in 1.2.x kernels
-    which could cause this.  It was fixed in 1.3.0.  If you can't
-    upgrade, you can probably work around the problem by specifying a
-    blocksize of 2048 when mounting.  (Note that you won't be able to
-    directly execute binaries off the CDROM in that case.)
-
-    If you see this in kernels later than 1.3.0, please report it as a
-    bug.
-
-
-f. Data corruption.
-
-  - Random data corruption was occasionally observed with the Hitachi
-    CDR-7730 CDROM. If you experience data corruption, using "hdx=slow"
-    as a command line parameter may work around the problem, at the
-    expense of low system performance.
-
-
-5. cdchange.c
--------------
-
-::
-
-  /*
-   * cdchange.c  [-v]  <device>  [<slot>]
-   *
-   * This loads a CDROM from a specified slot in a changer, and displays
-   * information about the changer status.  The drive should be unmounted before
-   * using this program.
-   *
-   * Changer information is displayed if either the -v flag is specified
-   * or no slot was specified.
-   *
-   * Based on code originally from Gerhard Zuber <zuber@...lin.snafu.de>.
-   * Changer status information, and rewrite for the new Uniform CDROM driver
-   * interface by Erik Andersen <andersee@...ian.org>.
-   */
-
-  #include <stdio.h>
-  #include <stdlib.h>
-  #include <errno.h>
-  #include <string.h>
-  #include <unistd.h>
-  #include <fcntl.h>
-  #include <sys/ioctl.h>
-  #include <linux/cdrom.h>
-
-
-  int
-  main (int argc, char **argv)
-  {
-	char *program;
-	char *device;
-	int fd;           /* file descriptor for CD-ROM device */
-	int status;       /* return status for system calls */
-	int verbose = 0;
-	int slot=-1, x_slot;
-	int total_slots_available;
-
-	program = argv[0];
-
-	++argv;
-	--argc;
-
-	if (argc < 1 || argc > 3) {
-		fprintf (stderr, "usage: %s [-v] <device> [<slot>]\n",
-			 program);
-		fprintf (stderr, "       Slots are numbered 1 -- n.\n");
-		exit (1);
-	}
-
-       if (strcmp (argv[0], "-v") == 0) {
-                verbose = 1;
-                ++argv;
-                --argc;
-        }
-
-	device = argv[0];
-
-	if (argc == 2)
-		slot = atoi (argv[1]) - 1;
-
-	/* open device */
-	fd = open(device, O_RDONLY | O_NONBLOCK);
-	if (fd < 0) {
-		fprintf (stderr, "%s: open failed for `%s`: %s\n",
-			 program, device, strerror (errno));
-		exit (1);
-	}
-
-	/* Check CD player status */
-	total_slots_available = ioctl (fd, CDROM_CHANGER_NSLOTS);
-	if (total_slots_available <= 1 ) {
-		fprintf (stderr, "%s: Device `%s` is not an ATAPI "
-			"compliant CD changer.\n", program, device);
-		exit (1);
-	}
-
-	if (slot >= 0) {
-		if (slot >= total_slots_available) {
-			fprintf (stderr, "Bad slot number.  "
-				 "Should be 1 -- %d.\n",
-				 total_slots_available);
-			exit (1);
-		}
-
-		/* load */
-		slot=ioctl (fd, CDROM_SELECT_DISC, slot);
-		if (slot<0) {
-			fflush(stdout);
-				perror ("CDROM_SELECT_DISC ");
-			exit(1);
-		}
-	}
-
-	if (slot < 0 || verbose) {
-
-		status=ioctl (fd, CDROM_SELECT_DISC, CDSL_CURRENT);
-		if (status<0) {
-			fflush(stdout);
-			perror (" CDROM_SELECT_DISC");
-			exit(1);
-		}
-		slot=status;
-
-		printf ("Current slot: %d\n", slot+1);
-		printf ("Total slots available: %d\n",
-			total_slots_available);
-
-		printf ("Drive status: ");
-                status = ioctl (fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
-                if (status<0) {
-                  perror(" CDROM_DRIVE_STATUS");
-                } else switch(status) {
-		case CDS_DISC_OK:
-			printf ("Ready.\n");
-			break;
-		case CDS_TRAY_OPEN:
-			printf ("Tray Open.\n");
-			break;
-		case CDS_DRIVE_NOT_READY:
-			printf ("Drive Not Ready.\n");
-			break;
-		default:
-			printf ("This Should not happen!\n");
-			break;
-		}
-
-		for (x_slot=0; x_slot<total_slots_available; x_slot++) {
-			printf ("Slot %2d: ", x_slot+1);
-			status = ioctl (fd, CDROM_DRIVE_STATUS, x_slot);
-			if (status<0) {
-			     perror(" CDROM_DRIVE_STATUS");
-			} else switch(status) {
-			case CDS_DISC_OK:
-				printf ("Disc present.");
-				break;
-			case CDS_NO_DISC:
-				printf ("Empty slot.");
-				break;
-			case CDS_TRAY_OPEN:
-				printf ("CD-ROM tray open.\n");
-				break;
-			case CDS_DRIVE_NOT_READY:
-				printf ("CD-ROM drive not ready.\n");
-				break;
-			case CDS_NO_INFO:
-				printf ("No Information available.");
-				break;
-			default:
-				printf ("This Should not happen!\n");
-				break;
-			}
-		  if (slot == x_slot) {
-                  status = ioctl (fd, CDROM_DISC_STATUS);
-                  if (status<0) {
-			perror(" CDROM_DISC_STATUS");
-                  }
-		  switch (status) {
-			case CDS_AUDIO:
-				printf ("\tAudio disc.\t");
-				break;
-			case CDS_DATA_1:
-			case CDS_DATA_2:
-				printf ("\tData disc type %d.\t", status-CDS_DATA_1+1);
-				break;
-			case CDS_XA_2_1:
-			case CDS_XA_2_2:
-				printf ("\tXA data disc type %d.\t", status-CDS_XA_2_1+1);
-				break;
-			default:
-				printf ("\tUnknown disc type 0x%x!\t", status);
-				break;
-			}
-			}
-			status = ioctl (fd, CDROM_MEDIA_CHANGED, x_slot);
-			if (status<0) {
-				perror(" CDROM_MEDIA_CHANGED");
-			}
-			switch (status) {
-			case 1:
-				printf ("Changed.\n");
-				break;
-			default:
-				printf ("\n");
-				break;
-			}
-		}
-	}
-
-	/* close device */
-	status = close (fd);
-	if (status != 0) {
-		fprintf (stderr, "%s: close failed for `%s`: %s\n",
-			 program, device, strerror (errno));
-		exit (1);
-	}
-
-	exit (0);
-  }

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