// SPDX-License-Identifier: GPL-2.0-only /* * sr.c Copyright (C) 1992 David Giller * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale * * adapted from: * sd.c Copyright (C) 1992 Drew Eckhardt * Linux scsi disk driver by * Drew Eckhardt <[email protected]> * * Modified by Eric Youngdale [email protected] to * add scatter-gather, multiple outstanding request, and other * enhancements. * * Modified by Eric Youngdale [email protected] to support loadable * low-level scsi drivers. * * Modified by Thomas Quinot [email protected] to * provide auto-eject. * * Modified by Gerd Knorr <[email protected]> to support the * generic cdrom interface * * Modified by Jens Axboe <[email protected]> - Uniform sr_packet() * interface, capabilities probe additions, ioctl cleanups, etc. * * Modified by Richard Gooch <[email protected]> to support devfs * * Modified by Jens Axboe <[email protected]> - support DVD-RAM * transparently and lose the GHOST hack * * Modified by Arnaldo Carvalho de Melo <[email protected]> * check resource allocation in sr_init and some cleanups */ #include <linux/module.h> #include <linux/fs.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/bio.h> #include <linux/compat.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/cdrom.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/major.h> #include <linux/blkdev.h> #include <linux/blk-pm.h> #include <linux/mutex.h> #include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/uaccess.h> #include <asm/unaligned.h> #include <scsi/scsi.h> #include <scsi/scsi_dbg.h> #include <scsi/scsi_device.h> #include <scsi/scsi_driver.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_host.h> #include <scsi/scsi_ioctl.h> /* For the door lock/unlock commands */ #include "scsi_logging.h" #include "sr.h" MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS_BLOCKDEV_MAJOR(…); MODULE_ALIAS_SCSI_DEVICE(…); MODULE_ALIAS_SCSI_DEVICE(…); #define SR_DISKS … #define SR_CAPABILITIES … static int sr_probe(struct device *); static int sr_remove(struct device *); static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt); static int sr_done(struct scsi_cmnd *); static int sr_runtime_suspend(struct device *dev); static const struct dev_pm_ops sr_pm_ops = …; static struct scsi_driver sr_template = …; static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG]; static DEFINE_SPINLOCK(sr_index_lock); static struct lock_class_key sr_bio_compl_lkclass; static int sr_open(struct cdrom_device_info *, int); static void sr_release(struct cdrom_device_info *); static int get_sectorsize(struct scsi_cd *); static int get_capabilities(struct scsi_cd *); static unsigned int sr_check_events(struct cdrom_device_info *cdi, unsigned int clearing, int slot); static int sr_packet(struct cdrom_device_info *, struct packet_command *); static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, u32 lba, u32 nr, u8 *last_sense); static const struct cdrom_device_ops sr_dops = …; static inline struct scsi_cd *scsi_cd(struct gendisk *disk) { … } static int sr_runtime_suspend(struct device *dev) { … } static unsigned int sr_get_events(struct scsi_device *sdev) { … } /* * This function checks to see if the media has been changed or eject * button has been pressed. It is possible that we have already * sensed a change, or the drive may have sensed one and not yet * reported it. The past events are accumulated in sdev->changed and * returned together with the current state. */ static unsigned int sr_check_events(struct cdrom_device_info *cdi, unsigned int clearing, int slot) { … } /* * sr_done is the interrupt routine for the device driver. * * It will be notified on the end of a SCSI read / write, and will take one * of several actions based on success or failure. */ static int sr_done(struct scsi_cmnd *SCpnt) { … } static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt) { … } static int sr_revalidate_disk(struct scsi_cd *cd) { … } static int sr_block_open(struct gendisk *disk, blk_mode_t mode) { … } static void sr_block_release(struct gendisk *disk) { … } static int sr_block_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned cmd, unsigned long arg) { … } static unsigned int sr_block_check_events(struct gendisk *disk, unsigned int clearing) { … } static void sr_free_disk(struct gendisk *disk) { … } static const struct block_device_operations sr_bdops = …; static int sr_open(struct cdrom_device_info *cdi, int purpose) { … } static void sr_release(struct cdrom_device_info *cdi) { … } static int sr_probe(struct device *dev) { … } static int get_sectorsize(struct scsi_cd *cd) { … } static int get_capabilities(struct scsi_cd *cd) { … } /* * sr_packet() is the entry point for the generic commands generated * by the Uniform CD-ROM layer. */ static int sr_packet(struct cdrom_device_info *cdi, struct packet_command *cgc) { … } static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, u32 lba, u32 nr, u8 *last_sense) { … } static int sr_remove(struct device *dev) { … } static int __init init_sr(void) { … } static void __exit exit_sr(void) { … } module_init(…) …; module_exit(exit_sr); MODULE_LICENSE(…) …;
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