Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 275 insertions, 0 deletions

diff --git a/include/linux/pktcdvd.h b/include/linux/pktcdvd.h
new file mode 100644
index 000000000000..4e2d2a942ecb
--- /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 */