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, 212 insertions, 0 deletions

diff --git a/drivers/scsi/st.h b/drivers/scsi/st.h
new file mode 100644
index 000000000000..061da111398e
--- /dev/null
+++ b/drivers/scsi/st.h
@@ -0,0 +1,212 @@
+
+#ifndef _ST_H
+#define _ST_H
+
+#include <linux/completion.h>
+
+
+/* Descriptor for analyzed sense data */
+struct st_cmdstatus {
+        int midlevel_result;
+        struct scsi_sense_hdr sense_hdr;
+        int have_sense;
+        u64 uremainder64;
+        u8 flags;
+        u8 remainder_valid;
+        u8 fixed_format;
+        u8 deferred;
+};
+
+/* The tape buffer descriptor. */
+struct st_buffer {
+        unsigned char in_use;
+        unsigned char dma;      /* DMA-able buffer */
+        unsigned char do_dio;   /* direct i/o set up? */
+        int buffer_size;
+        int buffer_blocks;
+        int buffer_bytes;
+        int read_pointer;
+        int writing;
+        int syscall_result;
+        struct scsi_request *last_SRpnt;
+        struct st_cmdstatus cmdstat;
+        unsigned char *b_data;
+        unsigned short use_sg;  /* zero or max number of s/g segments for this adapter */
+        unsigned short sg_segs;         /* number of segments in s/g list */
+        unsigned short orig_frp_segs;   /* number of segments allocated at first try */
+        unsigned short frp_segs;        /* number of buffer segments */
+        unsigned int frp_sg_current;    /* driver buffer length currently in s/g list */
+        struct st_buf_fragment *frp;    /* the allocated buffer fragment list */
+        struct scatterlist sg[1];       /* MUST BE last item */
+};
+
+/* The tape buffer fragment descriptor */
+struct st_buf_fragment {
+        struct page *page;
+        unsigned int length;
+};
+
+/* The tape mode definition */
+struct st_modedef {
+        unsigned char defined;
+        unsigned char sysv;     /* SYS V semantics? */
+        unsigned char do_async_writes;
+        unsigned char do_buffer_writes;
+        unsigned char do_read_ahead;
+        unsigned char defaults_for_writes;
+        unsigned char default_compression;      /* 0 = don't touch, etc */
+        short default_density;  /* Forced density, -1 = no value */
+        int default_blksize;    /* Forced blocksize, -1 = no value */
+        struct cdev *cdevs[2];  /* Auto-rewind and non-rewind devices */
+};
+
+/* Number of modes can be changed by changing ST_NBR_MODE_BITS. The maximum
+   number of modes is 16 (ST_NBR_MODE_BITS 4) */
+#define ST_NBR_MODE_BITS 2
+#define ST_NBR_MODES (1 << ST_NBR_MODE_BITS)
+#define ST_MODE_SHIFT (7 - ST_NBR_MODE_BITS)
+#define ST_MODE_MASK ((ST_NBR_MODES - 1) << ST_MODE_SHIFT)
+
+#define ST_MAX_TAPES 128
+#define ST_MAX_TAPE_ENTRIES  (ST_MAX_TAPES << (ST_NBR_MODE_BITS + 1))
+
+/* The status related to each partition */
+struct st_partstat {
+        unsigned char rw;
+        unsigned char eof;
+        unsigned char at_sm;
+        unsigned char last_block_valid;
+        u32 last_block_visited;
+        int drv_block;          /* The block where the drive head is */
+        int drv_file;
+};
+
+#define ST_NBR_PARTITIONS 4
+
+/* The tape drive descriptor */
+struct scsi_tape {
+        struct scsi_driver *driver;
+        struct scsi_device *device;
+        struct semaphore lock;  /* For serialization */
+        struct completion wait; /* For SCSI commands */
+        struct st_buffer *buffer;
+
+        /* Drive characteristics */
+        unsigned char omit_blklims;
+        unsigned char do_auto_lock;
+        unsigned char can_bsr;
+        unsigned char can_partitions;
+        unsigned char two_fm;
+        unsigned char fast_mteom;
+        unsigned char immediate;
+        unsigned char restr_dma;
+        unsigned char scsi2_logical;
+        unsigned char default_drvbuffer;        /* 0xff = don't touch, value 3 bits */
+        unsigned char cln_mode;                 /* 0 = none, otherwise sense byte nbr */
+        unsigned char cln_sense_value;
+        unsigned char cln_sense_mask;
+        unsigned char use_pf;                   /* Set Page Format bit in all mode selects? */
+        unsigned char try_dio;                  /* try direct i/o? */
+        unsigned char c_algo;                   /* compression algorithm */
+        unsigned char pos_unknown;                      /* after reset position unknown */
+        int tape_type;
+        int long_timeout;       /* timeout for commands known to take long time */
+
+        unsigned long max_pfn;  /* the maximum page number reachable by the HBA */
+
+        /* Mode characteristics */
+        struct st_modedef modes[ST_NBR_MODES];
+        int current_mode;
+
+        /* Status variables */
+        int partition;
+        int new_partition;
+        int nbr_partitions;     /* zero until partition support enabled */
+        struct st_partstat ps[ST_NBR_PARTITIONS];
+        unsigned char dirty;
+        unsigned char ready;
+        unsigned char write_prot;
+        unsigned char drv_write_prot;
+        unsigned char in_use;
+        unsigned char blksize_changed;
+        unsigned char density_changed;
+        unsigned char compression_changed;
+        unsigned char drv_buffer;
+        unsigned char density;
+        unsigned char door_locked;
+        unsigned char autorew_dev;   /* auto-rewind device */
+        unsigned char rew_at_close;  /* rewind necessary at close */
+        unsigned char inited;
+        unsigned char cleaning_req;  /* cleaning requested? */
+        int block_size;
+        int min_block;
+        int max_block;
+        int recover_count;     /* From tape opening */
+        int recover_reg;       /* From last status call */
+
+#if DEBUG
+        unsigned char write_pending;
+        int nbr_finished;
+        int nbr_waits;
+        int nbr_requests;
+        int nbr_dio;
+        int nbr_pages;
+        int nbr_combinable;
+        unsigned char last_cmnd[6];
+        unsigned char last_sense[16];
+#endif
+        struct gendisk *disk;
+};
+
+/* Bit masks for use_pf */
+#define USE_PF      1
+#define PF_TESTED   2
+
+/* Values of eof */
+#define ST_NOEOF        0
+#define ST_FM_HIT       1
+#define ST_FM           2
+#define ST_EOM_OK       3
+#define ST_EOM_ERROR    4
+#define ST_EOD_1        5
+#define ST_EOD_2        6
+#define ST_EOD          7
+/* EOD hit while reading => ST_EOD_1 => return zero => ST_EOD_2 =>
+   return zero => ST_EOD, return ENOSPC */
+/* When writing: ST_EOM_OK == early warning found, write OK
+                 ST_EOD_1  == allow trying new write after early warning
+                 ST_EOM_ERROR == early warning found, not able to write all */
+
+/* Values of rw */
+#define ST_IDLE         0
+#define ST_READING      1
+#define ST_WRITING      2
+
+/* Values of ready state */
+#define ST_READY        0
+#define ST_NOT_READY    1
+#define ST_NO_TAPE      2
+
+/* Values for door lock state */
+#define ST_UNLOCKED     0
+#define ST_LOCKED_EXPLICIT 1
+#define ST_LOCKED_AUTO  2
+#define ST_LOCK_FAILS   3
+
+/* Positioning SCSI-commands for Tandberg, etc. drives */
+#define QFA_REQUEST_BLOCK       0x02
+#define QFA_SEEK_BLOCK          0x0c
+
+/* Setting the binary options */
+#define ST_DONT_TOUCH  0
+#define ST_NO          1
+#define ST_YES         2
+
+#define EXTENDED_SENSE_START  18
+
+/* Masks for some conditions in the sense data */
+#define SENSE_FMK   0x80
+#define SENSE_EOM   0x40
+#define SENSE_ILI   0x20
+
+#endif