Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 467 insertions, 0 deletions

diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
new file mode 100644
index 000000000..4a6e1a413
--- /dev/null
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -0,0 +1,467 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * cdrom.c IOCTLs handling for ide-cd driver.
+ *
+ * Copyright (C) 1994-1996  Scott Snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998  Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000  Jens Axboe <axboe@suse.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/cdrom.h>
+#include <linux/gfp.h>
+#include <linux/ide.h>
+#include <scsi/scsi.h>
+
+#include "ide-cd.h"
+
+/****************************************************************************
+ * Other driver requests (open, close, check media change).
+ */
+int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
+{
+	return 0;
+}
+
+/*
+ * Close down the device.  Invalidate all cached blocks.
+ */
+void ide_cdrom_release_real(struct cdrom_device_info *cdi)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	if (!cdi->use_count)
+		drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
+}
+
+/*
+ * add logic to try GET_EVENT command first to check for media and tray
+ * status. this should be supported by newer cd-r/w and all DVD etc
+ * drives
+ */
+int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
+{
+	ide_drive_t *drive = cdi->handle;
+	struct media_event_desc med;
+	struct scsi_sense_hdr sshdr;
+	int stat;
+
+	if (slot_nr != CDSL_CURRENT)
+		return -EINVAL;
+
+	stat = cdrom_check_status(drive, &sshdr);
+	if (!stat || sshdr.sense_key == UNIT_ATTENTION)
+		return CDS_DISC_OK;
+
+	if (!cdrom_get_media_event(cdi, &med)) {
+		if (med.media_present)
+			return CDS_DISC_OK;
+		else if (med.door_open)
+			return CDS_TRAY_OPEN;
+		else
+			return CDS_NO_DISC;
+	}
+
+	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04
+			&& sshdr.ascq == 0x04)
+		return CDS_DISC_OK;
+
+	/*
+	 * If not using Mt Fuji extended media tray reports,
+	 * just return TRAY_OPEN since ATAPI doesn't provide
+	 * any other way to detect this...
+	 */
+	if (sshdr.sense_key == NOT_READY) {
+		if (sshdr.asc == 0x3a && sshdr.ascq == 1)
+			return CDS_NO_DISC;
+		else
+			return CDS_TRAY_OPEN;
+	}
+	return CDS_DRIVE_NOT_READY;
+}
+
+/*
+ * ide-cd always generates media changed event if media is missing, which
+ * makes it impossible to use for proper event reporting, so disk->events
+ * is cleared to 0 and the following function is used only to trigger
+ * revalidation and never propagated to userland.
+ */
+unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
+					 unsigned int clearing, int slot_nr)
+{
+	ide_drive_t *drive = cdi->handle;
+	int retval;
+
+	if (slot_nr == CDSL_CURRENT) {
+		(void) cdrom_check_status(drive, NULL);
+		retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
+		drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
+		return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
+	} else {
+		return 0;
+	}
+}
+
+/* Eject the disk if EJECTFLAG is 0.
+   If EJECTFLAG is 1, try to reload the disk. */
+static
+int cdrom_eject(ide_drive_t *drive, int ejectflag)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct cdrom_device_info *cdi = &cd->devinfo;
+	char loej = 0x02;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
+		return -EDRIVE_CANT_DO_THIS;
+
+	/* reload fails on some drives, if the tray is locked */
+	if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
+		return 0;
+
+	/* only tell drive to close tray if open, if it can do that */
+	if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
+		loej = 0;
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_START_STOP_UNIT;
+	cmd[4] = loej | (ejectflag != 0);
+
+	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
+}
+
+/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
+static
+int ide_cd_lockdoor(ide_drive_t *drive, int lockflag)
+{
+	struct scsi_sense_hdr sshdr;
+	int stat;
+
+	/* If the drive cannot lock the door, just pretend. */
+	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
+		stat = 0;
+	} else {
+		unsigned char cmd[BLK_MAX_CDB];
+
+		memset(cmd, 0, BLK_MAX_CDB);
+
+		cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
+		cmd[4] = lockflag ? 1 : 0;
+
+		stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
+				       &sshdr, 0, 0);
+	}
+
+	/* If we got an illegal field error, the drive
+	   probably cannot lock the door. */
+	if (stat != 0 &&
+	    sshdr.sense_key == ILLEGAL_REQUEST &&
+	    (sshdr.asc == 0x24 || sshdr.asc == 0x20)) {
+		printk(KERN_ERR "%s: door locking not supported\n",
+			drive->name);
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+		stat = 0;
+	}
+
+	/* no medium, that's alright. */
+	if (stat != 0 && sshdr.sense_key == NOT_READY && sshdr.asc == 0x3a)
+		stat = 0;
+
+	if (stat == 0) {
+		if (lockflag)
+			drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
+		else
+			drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
+	}
+
+	return stat;
+}
+
+int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	if (position) {
+		int stat = ide_cd_lockdoor(drive, 0);
+
+		if (stat)
+			return stat;
+	}
+
+	return cdrom_eject(drive, !position);
+}
+
+int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	return ide_cd_lockdoor(drive, lock);
+}
+
+/*
+ * ATAPI devices are free to select the speed you request or any slower
+ * rate. :-(  Requesting too fast a speed will _not_ produce an error.
+ */
+int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
+{
+	ide_drive_t *drive = cdi->handle;
+	struct cdrom_info *cd = drive->driver_data;
+	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
+	int stat;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	if (speed == 0)
+		speed = 0xffff; /* set to max */
+	else
+		speed *= 177;   /* Nx to kbytes/s */
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_SET_SPEED;
+	/* Read Drive speed in kbytes/second MSB/LSB */
+	cmd[2] = (speed >> 8) & 0xff;
+	cmd[3] = speed & 0xff;
+	if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
+	    (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
+		/* Write Drive speed in kbytes/second MSB/LSB */
+		cmd[4] = (speed >> 8) & 0xff;
+		cmd[5] = speed & 0xff;
+	}
+
+	stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
+
+	if (!ide_cdrom_get_capabilities(drive, buf)) {
+		ide_cdrom_update_speed(drive, buf);
+		cdi->speed = cd->current_speed;
+	}
+
+	return 0;
+}
+
+int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
+			       struct cdrom_multisession *ms_info)
+{
+	struct atapi_toc *toc;
+	ide_drive_t *drive = cdi->handle;
+	struct cdrom_info *info = drive->driver_data;
+	int ret;
+
+	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
+		ret = ide_cd_read_toc(drive);
+		if (ret)
+			return ret;
+	}
+
+	toc = info->toc;
+	ms_info->addr.lba = toc->last_session_lba;
+	ms_info->xa_flag = toc->xa_flag;
+
+	return 0;
+}
+
+int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
+		      struct cdrom_mcn *mcn_info)
+{
+	ide_drive_t *drive = cdi->handle;
+	int stat, mcnlen;
+	char buf[24];
+	unsigned char cmd[BLK_MAX_CDB];
+	unsigned len = sizeof(buf);
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_READ_SUBCHANNEL;
+	cmd[1] = 2;		/* MSF addressing */
+	cmd[2] = 0x40;	/* request subQ data */
+	cmd[3] = 2;		/* format */
+	cmd[8] = len;
+
+	stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
+	if (stat)
+		return stat;
+
+	mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
+	memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
+	mcn_info->medium_catalog_number[mcnlen] = '\0';
+
+	return 0;
+}
+
+int ide_cdrom_reset(struct cdrom_device_info *cdi)
+{
+	ide_drive_t *drive = cdi->handle;
+	struct cdrom_info *cd = drive->driver_data;
+	struct request *rq;
+	int ret;
+
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	rq->rq_flags = RQF_QUIET;
+	blk_execute_rq(drive->queue, cd->disk, rq, 0);
+	ret = scsi_req(rq)->result ? -EIO : 0;
+	blk_put_request(rq);
+	/*
+	 * A reset will unlock the door. If it was previously locked,
+	 * lock it again.
+	 */
+	if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
+		(void)ide_cd_lockdoor(drive, 1);
+
+	return ret;
+}
+
+static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
+				struct atapi_toc_entry **ent)
+{
+	struct cdrom_info *info = drive->driver_data;
+	struct atapi_toc *toc = info->toc;
+	int ntracks;
+
+	/*
+	 * don't serve cached data, if the toc isn't valid
+	 */
+	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
+		return -EINVAL;
+
+	/* Check validity of requested track number. */
+	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+
+	if (toc->hdr.first_track == CDROM_LEADOUT)
+		ntracks = 0;
+
+	if (track == CDROM_LEADOUT)
+		*ent = &toc->ent[ntracks];
+	else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
+		return -EINVAL;
+	else
+		*ent = &toc->ent[track - toc->hdr.first_track];
+
+	return 0;
+}
+
+static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
+{
+	struct cdrom_ti *ti = arg;
+	struct atapi_toc_entry *first_toc, *last_toc;
+	unsigned long lba_start, lba_end;
+	int stat;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
+	if (stat)
+		return stat;
+
+	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
+	if (stat)
+		return stat;
+
+	if (ti->cdti_trk1 != CDROM_LEADOUT)
+		++last_toc;
+	lba_start = first_toc->addr.lba;
+	lba_end   = last_toc->addr.lba;
+
+	if (lba_end <= lba_start)
+		return -EINVAL;
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_PLAY_AUDIO_MSF;
+	lba_to_msf(lba_start,   &cmd[3], &cmd[4], &cmd[5]);
+	lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
+
+	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
+}
+
+static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct cdrom_tochdr *tochdr = arg;
+	struct atapi_toc *toc;
+	int stat;
+
+	/* Make sure our saved TOC is valid. */
+	stat = ide_cd_read_toc(drive);
+	if (stat)
+		return stat;
+
+	toc = cd->toc;
+	tochdr->cdth_trk0 = toc->hdr.first_track;
+	tochdr->cdth_trk1 = toc->hdr.last_track;
+
+	return 0;
+}
+
+static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
+{
+	struct cdrom_tocentry *tocentry = arg;
+	struct atapi_toc_entry *toce;
+	int stat;
+
+	stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
+	if (stat)
+		return stat;
+
+	tocentry->cdte_ctrl = toce->control;
+	tocentry->cdte_adr  = toce->adr;
+	if (tocentry->cdte_format == CDROM_MSF) {
+		lba_to_msf(toce->addr.lba,
+			   &tocentry->cdte_addr.msf.minute,
+			   &tocentry->cdte_addr.msf.second,
+			   &tocentry->cdte_addr.msf.frame);
+	} else
+		tocentry->cdte_addr.lba = toce->addr.lba;
+
+	return 0;
+}
+
+int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
+			  unsigned int cmd, void *arg)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	switch (cmd) {
+	/*
+	 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
+	 * atapi doesn't support it
+	 */
+	case CDROMPLAYTRKIND:
+		return ide_cd_fake_play_trkind(drive, arg);
+	case CDROMREADTOCHDR:
+		return ide_cd_read_tochdr(drive, arg);
+	case CDROMREADTOCENTRY:
+		return ide_cd_read_tocentry(drive, arg);
+	default:
+		return -EINVAL;
+	}
+}
+
+/* the generic packet interface to cdrom.c */
+int ide_cdrom_packet(struct cdrom_device_info *cdi,
+			    struct packet_command *cgc)
+{
+	ide_drive_t *drive = cdi->handle;
+	req_flags_t flags = 0;
+	unsigned len = cgc->buflen;
+
+	if (cgc->timeout <= 0)
+		cgc->timeout = ATAPI_WAIT_PC;
+
+	/* here we queue the commands from the uniform CD-ROM
+	   layer. the packet must be complete, as we do not
+	   touch it at all. */
+
+	if (cgc->sshdr)
+		memset(cgc->sshdr, 0, sizeof(*cgc->sshdr));
+
+	if (cgc->quiet)
+		flags |= RQF_QUIET;
+
+	cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
+				    cgc->data_direction == CGC_DATA_WRITE,
+				    cgc->buffer, &len,
+				    cgc->sshdr, cgc->timeout, flags);
+	if (!cgc->stat)
+		cgc->buflen -= len;
+	return cgc->stat;
+}