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/drivers/scsi/st.h b/drivers/scsi/st.h
new file mode 100644
index 0000000..061da11
--- /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