Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/linux/pktcdvd.h b/include/linux/pktcdvd.h
new file mode 100644
index 0000000..4e2d2a9
--- /dev/null
+++ b/include/linux/pktcdvd.h
@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2000 Jens Axboe <axboe@suse.de>
+ * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License. See linux/COPYING for more information.
+ *
+ * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and
+ * DVD-RW devices.
+ *
+ */
+#ifndef __PKTCDVD_H
+#define __PKTCDVD_H
+
+#include <linux/types.h>
+
+/*
+ * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
+ */
+#define PACKET_DEBUG 1
+
+#define MAX_WRITERS 8
+
+#define PKT_RB_POOL_SIZE 512
+
+/*
+ * How long we should hold a non-full packet before starting data gathering.
+ */
+#define PACKET_WAIT_TIME (HZ * 5 / 1000)
+
+/*
+ * use drive write caching -- we need deferred error handling to be
+ * able to sucessfully recover with this option (drive will return good
+ * status as soon as the cdb is validated).
+ */
+#if defined(CONFIG_CDROM_PKTCDVD_WCACHE)
+#define USE_WCACHING 1
+#else
+#define USE_WCACHING 0
+#endif
+
+/*
+ * No user-servicable parts beyond this point ->
+ */
+
+/*
+ * device types
+ */
+#define PACKET_CDR 1
+#define PACKET_CDRW 2
+#define PACKET_DVDR 3
+#define PACKET_DVDRW 4
+
+/*
+ * flags
+ */
+#define PACKET_WRITABLE 1 /* pd is writable */
+#define PACKET_NWA_VALID 2 /* next writable address valid */
+#define PACKET_LRA_VALID 3 /* last recorded address valid */
+#define PACKET_MERGE_SEGS 4 /* perform segment merging to keep */
+ /* underlying cdrom device happy */
+
+/*
+ * Disc status -- from READ_DISC_INFO
+ */
+#define PACKET_DISC_EMPTY 0
+#define PACKET_DISC_INCOMPLETE 1
+#define PACKET_DISC_COMPLETE 2
+#define PACKET_DISC_OTHER 3
+
+/*
+ * write type, and corresponding data block type
+ */
+#define PACKET_MODE1 1
+#define PACKET_MODE2 2
+#define PACKET_BLOCK_MODE1 8
+#define PACKET_BLOCK_MODE2 10
+
+/*
+ * Last session/border status
+ */
+#define PACKET_SESSION_EMPTY 0
+#define PACKET_SESSION_INCOMPLETE 1
+#define PACKET_SESSION_RESERVED 2
+#define PACKET_SESSION_COMPLETE 3
+
+#define PACKET_MCN "4a656e734178626f65323030300000"
+
+#undef PACKET_USE_LS
+
+#define PKT_CTRL_CMD_SETUP 0
+#define PKT_CTRL_CMD_TEARDOWN 1
+#define PKT_CTRL_CMD_STATUS 2
+
+struct pkt_ctrl_command {
+ __u32 command; /* in: Setup, teardown, status */
+ __u32 dev_index; /* in/out: Device index */
+ __u32 dev; /* in/out: Device nr for cdrw device */
+ __u32 pkt_dev; /* in/out: Device nr for packet device */
+ __u32 num_devices; /* out: Largest device index + 1 */
+ __u32 padding; /* Not used */
+};
+
+/*
+ * packet ioctls
+ */
+#define PACKET_IOCTL_MAGIC ('X')
+#define PACKET_CTRL_CMD _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
+
+#ifdef __KERNEL__
+#include <linux/blkdev.h>
+#include <linux/completion.h>
+#include <linux/cdrom.h>
+
+struct packet_settings
+{
+ __u8 size; /* packet size in (512 byte) sectors */
+ __u8 fp; /* fixed packets */
+ __u8 link_loss; /* the rest is specified
+ * as per Mt Fuji */
+ __u8 write_type;
+ __u8 track_mode;
+ __u8 block_mode;
+};
+
+/*
+ * Very crude stats for now
+ */
+struct packet_stats
+{
+ unsigned long pkt_started;
+ unsigned long pkt_ended;
+ unsigned long secs_w;
+ unsigned long secs_rg;
+ unsigned long secs_r;
+};
+
+struct packet_cdrw
+{
+ struct list_head pkt_free_list;
+ struct list_head pkt_active_list;
+ spinlock_t active_list_lock; /* Serialize access to pkt_active_list */
+ struct task_struct *thread;
+ atomic_t pending_bios;
+};
+
+/*
+ * Switch to high speed reading after reading this many kilobytes
+ * with no interspersed writes.
+ */
+#define HI_SPEED_SWITCH 512
+
+struct packet_iosched
+{
+ atomic_t attention; /* Set to non-zero when queue processing is needed */
+ int writing; /* Non-zero when writing, zero when reading */
+ spinlock_t lock; /* Protecting read/write queue manipulations */
+ struct bio *read_queue;
+ struct bio *read_queue_tail;
+ struct bio *write_queue;
+ struct bio *write_queue_tail;
+ int high_prio_read; /* An important read request has been queued */
+ int successive_reads;
+};
+
+/*
+ * 32 buffers of 2048 bytes
+ */
+#define PACKET_MAX_SIZE 32
+#define PAGES_PER_PACKET (PACKET_MAX_SIZE * CD_FRAMESIZE / PAGE_SIZE)
+#define PACKET_MAX_SECTORS (PACKET_MAX_SIZE * CD_FRAMESIZE >> 9)
+
+enum packet_data_state {
+ PACKET_IDLE_STATE, /* Not used at the moment */
+ PACKET_WAITING_STATE, /* Waiting for more bios to arrive, so */
+ /* we don't have to do as much */
+ /* data gathering */
+ PACKET_READ_WAIT_STATE, /* Waiting for reads to fill in holes */
+ PACKET_WRITE_WAIT_STATE, /* Waiting for the write to complete */
+ PACKET_RECOVERY_STATE, /* Recover after read/write errors */
+ PACKET_FINISHED_STATE, /* After write has finished */
+
+ PACKET_NUM_STATES /* Number of possible states */
+};
+
+/*
+ * Information needed for writing a single packet
+ */
+struct pktcdvd_device;
+
+struct packet_data
+{
+ struct list_head list;
+
+ spinlock_t lock; /* Lock protecting state transitions and */
+ /* orig_bios list */
+
+ struct bio *orig_bios; /* Original bios passed to pkt_make_request */
+ struct bio *orig_bios_tail;/* that will be handled by this packet */
+ int write_size; /* Total size of all bios in the orig_bios */
+ /* list, measured in number of frames */
+
+ struct bio *w_bio; /* The bio we will send to the real CD */
+ /* device once we have all data for the */
+ /* packet we are going to write */
+ sector_t sector; /* First sector in this packet */
+ int frames; /* Number of frames in this packet */
+
+ enum packet_data_state state; /* Current state */
+ atomic_t run_sm; /* Incremented whenever the state */
+ /* machine needs to be run */
+ long sleep_time; /* Set this to non-zero to make the state */
+ /* machine run after this many jiffies. */
+
+ atomic_t io_wait; /* Number of pending IO operations */
+ atomic_t io_errors; /* Number of read/write errors during IO */
+
+ struct bio *r_bios[PACKET_MAX_SIZE]; /* bios to use during data gathering */
+ struct page *pages[PAGES_PER_PACKET];
+
+ int cache_valid; /* If non-zero, the data for the zone defined */
+ /* by the sector variable is completely cached */
+ /* in the pages[] vector. */
+
+ int id; /* ID number for debugging */
+ struct pktcdvd_device *pd;
+};
+
+struct pkt_rb_node {
+ struct rb_node rb_node;
+ struct bio *bio;
+};
+
+struct packet_stacked_data
+{
+ struct bio *bio; /* Original read request bio */
+ struct pktcdvd_device *pd;
+};
+#define PSD_POOL_SIZE 64
+
+struct pktcdvd_device
+{
+ struct block_device *bdev; /* dev attached */
+ dev_t pkt_dev; /* our dev */
+ char name[20];
+ struct packet_settings settings;
+ struct packet_stats stats;
+ int refcnt; /* Open count */
+ int write_speed; /* current write speed, kB/s */
+ int read_speed; /* current read speed, kB/s */
+ unsigned long offset; /* start offset */
+ __u8 mode_offset; /* 0 / 8 */
+ __u8 type;
+ unsigned long flags;
+ __u16 mmc3_profile;
+ __u32 nwa; /* next writable address */
+ __u32 lra; /* last recorded address */
+ struct packet_cdrw cdrw;
+ wait_queue_head_t wqueue;
+
+ spinlock_t lock; /* Serialize access to bio_queue */
+ struct rb_root bio_queue; /* Work queue of bios we need to handle */
+ int bio_queue_size; /* Number of nodes in bio_queue */
+ sector_t current_sector; /* Keep track of where the elevator is */
+ atomic_t scan_queue; /* Set to non-zero when pkt_handle_queue */
+ /* needs to be run. */
+ mempool_t *rb_pool; /* mempool for pkt_rb_node allocations */
+
+ struct packet_iosched iosched;
+ struct gendisk *disk;
+};
+
+#endif /* __KERNEL__ */
+
+#endif /* __PKTCDVD_H */