v4.19.13 snapshot.
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
new file mode 100644
index 0000000..528271c
--- /dev/null
+++ b/include/linux/cdrom.h
@@ -0,0 +1,317 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * -- <linux/cdrom.h>
+ * General header file for linux CD-ROM drivers
+ * Copyright (C) 1992 David Giller, rafetmad@oxy.edu
+ * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de
+ * 1996 David van Leeuwen, david@tm.tno.nl
+ * 1997, 1998 Erik Andersen, andersee@debian.org
+ * 1998-2002 Jens Axboe, axboe@suse.de
+ */
+#ifndef _LINUX_CDROM_H
+#define _LINUX_CDROM_H
+
+#include <linux/fs.h> /* not really needed, later.. */
+#include <linux/list.h>
+#include <scsi/scsi_common.h>
+#include <uapi/linux/cdrom.h>
+
+struct packet_command
+{
+ unsigned char cmd[CDROM_PACKET_SIZE];
+ unsigned char *buffer;
+ unsigned int buflen;
+ int stat;
+ struct scsi_sense_hdr *sshdr;
+ unsigned char data_direction;
+ int quiet;
+ int timeout;
+ void *reserved[1];
+};
+
+/*
+ * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
+ */
+#define CDDA_OLD 0 /* old style */
+#define CDDA_BPC_SINGLE 1 /* single frame block pc */
+#define CDDA_BPC_FULL 2 /* multi frame block pc */
+
+/* Uniform cdrom data structures for cdrom.c */
+struct cdrom_device_info {
+ const struct cdrom_device_ops *ops; /* link to device_ops */
+ struct list_head list; /* linked list of all device_info */
+ struct gendisk *disk; /* matching block layer disk */
+ void *handle; /* driver-dependent data */
+/* specifications */
+ int mask; /* mask of capability: disables them */
+ int speed; /* maximum speed for reading data */
+ int capacity; /* number of discs in jukebox */
+/* device-related storage */
+ unsigned int options : 30; /* options flags */
+ unsigned mc_flags : 2; /* media change buffer flags */
+ unsigned int vfs_events; /* cached events for vfs path */
+ unsigned int ioctl_events; /* cached events for ioctl path */
+ int use_count; /* number of times device opened */
+ char name[20]; /* name of the device type */
+/* per-device flags */
+ __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */
+ __u8 keeplocked : 1; /* CDROM_LOCKDOOR status */
+ __u8 reserved : 5; /* not used yet */
+ int cdda_method; /* see flags */
+ __u8 last_sense;
+ __u8 media_written; /* dirty flag, DVD+RW bookkeeping */
+ unsigned short mmc3_profile; /* current MMC3 profile */
+ int for_data;
+ int (*exit)(struct cdrom_device_info *);
+ int mrw_mode_page;
+};
+
+struct cdrom_device_ops {
+/* routines */
+ int (*open) (struct cdrom_device_info *, int);
+ void (*release) (struct cdrom_device_info *);
+ int (*drive_status) (struct cdrom_device_info *, int);
+ unsigned int (*check_events) (struct cdrom_device_info *cdi,
+ unsigned int clearing, int slot);
+ int (*media_changed) (struct cdrom_device_info *, int);
+ int (*tray_move) (struct cdrom_device_info *, int);
+ int (*lock_door) (struct cdrom_device_info *, int);
+ int (*select_speed) (struct cdrom_device_info *, int);
+ int (*select_disc) (struct cdrom_device_info *, int);
+ int (*get_last_session) (struct cdrom_device_info *,
+ struct cdrom_multisession *);
+ int (*get_mcn) (struct cdrom_device_info *,
+ struct cdrom_mcn *);
+ /* hard reset device */
+ int (*reset) (struct cdrom_device_info *);
+ /* play stuff */
+ int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
+
+/* driver specifications */
+ const int capability; /* capability flags */
+ /* handle uniform packets for scsi type devices (scsi,atapi) */
+ int (*generic_packet) (struct cdrom_device_info *,
+ struct packet_command *);
+};
+
+/* the general block_device operations structure: */
+extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
+ fmode_t mode);
+extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
+extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
+ fmode_t mode, unsigned int cmd, unsigned long arg);
+extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
+ unsigned int clearing);
+extern int cdrom_media_changed(struct cdrom_device_info *);
+
+extern int register_cdrom(struct cdrom_device_info *cdi);
+extern void unregister_cdrom(struct cdrom_device_info *cdi);
+
+typedef struct {
+ int data;
+ int audio;
+ int cdi;
+ int xa;
+ long error;
+} tracktype;
+
+extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written);
+extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
+extern int cdrom_mode_select(struct cdrom_device_info *cdi,
+ struct packet_command *cgc);
+extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
+ struct packet_command *cgc,
+ int page_code, int page_control);
+extern void init_cdrom_command(struct packet_command *cgc,
+ void *buffer, int len, int type);
+extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
+ struct packet_command *cgc);
+
+/* The SCSI spec says there could be 256 slots. */
+#define CDROM_MAX_SLOTS 256
+
+struct cdrom_mechstat_header {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 fault : 1;
+ __u8 changer_state : 2;
+ __u8 curslot : 5;
+ __u8 mech_state : 3;
+ __u8 door_open : 1;
+ __u8 reserved1 : 4;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 curslot : 5;
+ __u8 changer_state : 2;
+ __u8 fault : 1;
+ __u8 reserved1 : 4;
+ __u8 door_open : 1;
+ __u8 mech_state : 3;
+#endif
+ __u8 curlba[3];
+ __u8 nslots;
+ __u16 slot_tablelen;
+};
+
+struct cdrom_slot {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 disc_present : 1;
+ __u8 reserved1 : 6;
+ __u8 change : 1;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 change : 1;
+ __u8 reserved1 : 6;
+ __u8 disc_present : 1;
+#endif
+ __u8 reserved2[3];
+};
+
+struct cdrom_changer_info {
+ struct cdrom_mechstat_header hdr;
+ struct cdrom_slot slots[CDROM_MAX_SLOTS];
+};
+
+typedef enum {
+ mechtype_caddy = 0,
+ mechtype_tray = 1,
+ mechtype_popup = 2,
+ mechtype_individual_changer = 4,
+ mechtype_cartridge_changer = 5
+} mechtype_t;
+
+typedef struct {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 ps : 1;
+ __u8 reserved1 : 1;
+ __u8 page_code : 6;
+ __u8 page_length;
+ __u8 reserved2 : 1;
+ __u8 bufe : 1;
+ __u8 ls_v : 1;
+ __u8 test_write : 1;
+ __u8 write_type : 4;
+ __u8 multi_session : 2; /* or border, DVD */
+ __u8 fp : 1;
+ __u8 copy : 1;
+ __u8 track_mode : 4;
+ __u8 reserved3 : 4;
+ __u8 data_block_type : 4;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 page_code : 6;
+ __u8 reserved1 : 1;
+ __u8 ps : 1;
+ __u8 page_length;
+ __u8 write_type : 4;
+ __u8 test_write : 1;
+ __u8 ls_v : 1;
+ __u8 bufe : 1;
+ __u8 reserved2 : 1;
+ __u8 track_mode : 4;
+ __u8 copy : 1;
+ __u8 fp : 1;
+ __u8 multi_session : 2; /* or border, DVD */
+ __u8 data_block_type : 4;
+ __u8 reserved3 : 4;
+#endif
+ __u8 link_size;
+ __u8 reserved4;
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 reserved5 : 2;
+ __u8 app_code : 6;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 app_code : 6;
+ __u8 reserved5 : 2;
+#endif
+ __u8 session_format;
+ __u8 reserved6;
+ __be32 packet_size;
+ __u16 audio_pause;
+ __u8 mcn[16];
+ __u8 isrc[16];
+ __u8 subhdr0;
+ __u8 subhdr1;
+ __u8 subhdr2;
+ __u8 subhdr3;
+} __attribute__((packed)) write_param_page;
+
+struct modesel_head
+{
+ __u8 reserved1;
+ __u8 medium;
+ __u8 reserved2;
+ __u8 block_desc_length;
+ __u8 density;
+ __u8 number_of_blocks_hi;
+ __u8 number_of_blocks_med;
+ __u8 number_of_blocks_lo;
+ __u8 reserved3;
+ __u8 block_length_hi;
+ __u8 block_length_med;
+ __u8 block_length_lo;
+};
+
+typedef struct {
+ __u16 report_key_length;
+ __u8 reserved1;
+ __u8 reserved2;
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 type_code : 2;
+ __u8 vra : 3;
+ __u8 ucca : 3;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 ucca : 3;
+ __u8 vra : 3;
+ __u8 type_code : 2;
+#endif
+ __u8 region_mask;
+ __u8 rpc_scheme;
+ __u8 reserved3;
+} rpc_state_t;
+
+struct event_header {
+ __be16 data_len;
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 nea : 1;
+ __u8 reserved1 : 4;
+ __u8 notification_class : 3;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 notification_class : 3;
+ __u8 reserved1 : 4;
+ __u8 nea : 1;
+#endif
+ __u8 supp_event_class;
+};
+
+struct media_event_desc {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ __u8 reserved1 : 4;
+ __u8 media_event_code : 4;
+ __u8 reserved2 : 6;
+ __u8 media_present : 1;
+ __u8 door_open : 1;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ __u8 media_event_code : 4;
+ __u8 reserved1 : 4;
+ __u8 door_open : 1;
+ __u8 media_present : 1;
+ __u8 reserved2 : 6;
+#endif
+ __u8 start_slot;
+ __u8 end_slot;
+};
+
+extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
+
+static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
+{
+ lba += CD_MSF_OFFSET;
+ lba &= 0xffffff; /* negative lbas use only 24 bits */
+ *m = lba / (CD_SECS * CD_FRAMES);
+ lba %= (CD_SECS * CD_FRAMES);
+ *s = lba / CD_FRAMES;
+ *f = lba % CD_FRAMES;
+}
+
+static inline int msf_to_lba(u8 m, u8 s, u8 f)
+{
+ return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
+}
+#endif /* _LINUX_CDROM_H */