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osst.h
资源名称：linux-2.4.20.tar.gz　[点击查看]
上传用户：jlfgdled
上传日期：2013-04-10
资源大小：33168k
文件大小：24k
源码类别：

Linux/Unix编程

开发平台：

Unix_Linux

osst.h：源码内容
  1. /*
  2.  * $Header: /home/cvsroot/Driver/osst.h,v 1.12 2001/10/11 00:30:15 riede Exp $
  3.  */
  5. #include <asm/byteorder.h>
  6. #include <linux/config.h>
  7. #include <linux/completion.h>
  8. #ifdef CONFIG_DEVFS_FS
  9. #include <linux/devfs_fs_kernel.h>
  10. #endif
  12. /* FIXME - rename and use the following two types or delete them!
  13.  *              and the types really should go to st.h anyway...
  14.  * INQUIRY packet command - Data Format (From Table 6-8 of QIC-157C)
  15.  */
  16. typedef struct {
  17. unsigned device_type :5; /* Peripheral Device Type */
  18. unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
  19. unsigned reserved1_6t0 :7; /* Reserved */
  20. unsigned rmb :1; /* Removable Medium Bit */
  21. unsigned ansi_version :3; /* ANSI Version */
  22. unsigned ecma_version :3; /* ECMA Version */
  23. unsigned iso_version :2; /* ISO Version */
  24. unsigned response_format :4; /* Response Data Format */
  25. unsigned reserved3_45 :2; /* Reserved */
  26. unsigned reserved3_6 :1; /* TrmIOP - Reserved */
  27. unsigned reserved3_7 :1; /* AENC - Reserved */
  28. u8 additional_length; /* Additional Length (total_length-4) */
  29. u8 rsv5, rsv6, rsv7; /* Reserved */
  30. u8 vendor_id[8]; /* Vendor Identification */
  31. u8 product_id[16]; /* Product Identification */
  32. u8 revision_level[4]; /* Revision Level */
  33. u8 vendor_specific[20]; /* Vendor Specific - Optional */
  34. u8 reserved56t95[40]; /* Reserved - Optional */
  35. /* Additional information may be returned */
  36. } idetape_inquiry_result_t;
  38. /*
  39.  * READ POSITION packet command - Data Format (From Table 6-57)
  40.  */
  41. typedef struct {
  42. unsigned reserved0_10 :2; /* Reserved */
  43. unsigned bpu :1; /* Block Position Unknown */
  44. unsigned reserved0_543 :3; /* Reserved */
  45. unsigned eop :1; /* End Of Partition */
  46. unsigned bop :1; /* Beginning Of Partition */
  47. u8 partition; /* Partition Number */
  48. u8 reserved2, reserved3; /* Reserved */
  49. u32 first_block; /* First Block Location */
  50. u32 last_block; /* Last Block Location (Optional) */
  51. u8 reserved12; /* Reserved */
  52. u8 blocks_in_buffer[3]; /* Blocks In Buffer - (Optional) */
  53. u32 bytes_in_buffer; /* Bytes In Buffer (Optional) */
  54. } idetape_read_position_result_t;
  56. /*
  57.  *      Follows structures which are related to the SELECT SENSE / MODE SENSE
  58.  *      packet commands. 
  59.  */
  60. #define COMPRESSION_PAGE           0x0f
  61. #define COMPRESSION_PAGE_LENGTH    16
  63. #define CAPABILITIES_PAGE          0x2a
  64. #define CAPABILITIES_PAGE_LENGTH   20
  66. #define TAPE_PARAMTR_PAGE          0x2b
  67. #define TAPE_PARAMTR_PAGE_LENGTH   16
  69. #define NUMBER_RETRIES_PAGE        0x2f
  70. #define NUMBER_RETRIES_PAGE_LENGTH 4
  72. #define BLOCK_SIZE_PAGE            0x30
  73. #define BLOCK_SIZE_PAGE_LENGTH     4
  75. #define BUFFER_FILLING_PAGE        0x33
  76. #define BUFFER_FILLING_PAGE_LENGTH 
  78. #define VENDOR_IDENT_PAGE          0x36
  79. #define VENDOR_IDENT_PAGE_LENGTH   8
  81. #define LOCATE_STATUS_PAGE         0x37
  82. #define LOCATE_STATUS_PAGE_LENGTH  0
  84. #define MODE_HEADER_LENGTH         4
  87. /*
  88.  * REQUEST SENSE packet command result - Data Format.
  89.  */
  90. typedef struct {
  91. unsigned error_code :7; /* Current of deferred errors */
  92. unsigned valid :1; /* The information field conforms to QIC-157C */
  93. u8 reserved1 :8; /* Segment Number - Reserved */
  94. unsigned sense_key :4; /* Sense Key */
  95. unsigned reserved2_4 :1; /* Reserved */
  96. unsigned ili :1; /* Incorrect Length Indicator */
  97. unsigned eom :1; /* End Of Medium */
  98. unsigned filemark  :1; /* Filemark */
  99. u32 information __attribute__ ((packed));
  100. u8 asl; /* Additional sense length (n-7) */
  101. u32 command_specific; /* Additional command specific information */
  102. u8 asc; /* Additional Sense Code */
  103. u8 ascq; /* Additional Sense Code Qualifier */
  104. u8 replaceable_unit_code; /* Field Replaceable Unit Code */
  105. unsigned sk_specific1  :7; /* Sense Key Specific */
  106. unsigned sksv :1; /* Sense Key Specific information is valid */
  107. u8 sk_specific2; /* Sense Key Specific */
  108. u8 sk_specific3; /* Sense Key Specific */
  109. u8 pad[2]; /* Padding to 20 bytes */
  110. } idetape_request_sense_result_t;
  112. /*
  113.  *      Mode Parameter Header for the MODE SENSE packet command
  114.  */
  115. typedef struct {
  116.         u8              mode_data_length;       /* Length of the following data transfer */
  117.         u8              medium_type;            /* Medium Type */
  118.         u8              dsp;                    /* Device Specific Parameter */
  119.         u8              bdl;                    /* Block Descriptor Length */
  120. } osst_mode_parameter_header_t;
  122. /*
  123.  *      Mode Parameter Block Descriptor the MODE SENSE packet command
  124.  *
  125.  *      Support for block descriptors is optional.
  126.  */
  127. typedef struct {
  128.         u8              density_code;           /* Medium density code */
  129.         u8              blocks[3];              /* Number of blocks */
  130.         u8              reserved4;              /* Reserved */
  131.         u8              length[3];              /* Block Length */
  132. } osst_parameter_block_descriptor_t;
  134. /*
  135.  *      The Data Compression Page, as returned by the MODE SENSE packet command.
  136.  */
  137. typedef struct {
  138. #if   defined(__BIG_ENDIAN_BITFIELD)
  139.         unsigned        ps              :1;
  140.         unsigned        reserved0       :1;     /* Reserved */
  141. unsigned        page_code       :6;     /* Page Code - Should be 0xf */
  142. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  143. unsigned        page_code       :6;     /* Page Code - Should be 0xf */
  144.         unsigned        reserved0       :1;     /* Reserved */
  145.         unsigned        ps              :1;
  146. #else
  147. #error "Please fix <asm/byteorder.h>"
  148. #endif
  149.         u8              page_length;            /* Page Length - Should be 14 */
  150. #if   defined(__BIG_ENDIAN_BITFIELD)
  151.         unsigned        dce             :1;     /* Data Compression Enable */
  152.         unsigned        dcc             :1;     /* Data Compression Capable */
  153. unsigned        reserved2       :6;     /* Reserved */
  154. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  155. unsigned        reserved2       :6;     /* Reserved */
  156.         unsigned        dcc             :1;     /* Data Compression Capable */
  157.         unsigned        dce             :1;     /* Data Compression Enable */
  158. #else
  159. #error "Please fix <asm/byteorder.h>"
  160. #endif
  161. #if   defined(__BIG_ENDIAN_BITFIELD)
  162.         unsigned        dde             :1;     /* Data Decompression Enable */
  163.         unsigned        red             :2;     /* Report Exception on Decompression */
  164. unsigned        reserved3       :5;     /* Reserved */
  165. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  166. unsigned        reserved3       :5;     /* Reserved */
  167.         unsigned        red             :2;     /* Report Exception on Decompression */
  168.         unsigned        dde             :1;     /* Data Decompression Enable */
  169. #else
  170. #error "Please fix <asm/byteorder.h>"
  171. #endif
  172.         u32             ca;                     /* Compression Algorithm */
  173.         u32             da;                     /* Decompression Algorithm */
  174.         u8              reserved[4];            /* Reserved */
  175. } osst_data_compression_page_t;
  177. /*
  178.  *      The Medium Partition Page, as returned by the MODE SENSE packet command.
  179.  */
  180. typedef struct {
  181. #if   defined(__BIG_ENDIAN_BITFIELD)
  182.         unsigned        ps              :1;
  183.         unsigned        reserved1_6     :1;     /* Reserved */
  184. unsigned        page_code       :6;     /* Page Code - Should be 0x11 */
  185. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  186. unsigned        page_code       :6;     /* Page Code - Should be 0x11 */
  187.         unsigned        reserved1_6     :1;     /* Reserved */
  188.         unsigned        ps              :1;
  189. #else
  190. #error "Please fix <asm/byteorder.h>"
  191. #endif
  192.         u8              page_length;            /* Page Length - Should be 6 */
  193.         u8              map;                    /* Maximum Additional Partitions - Should be 0 */
  194.         u8              apd;                    /* Additional Partitions Defined - Should be 0 */
  195. #if   defined(__BIG_ENDIAN_BITFIELD)
  196.         unsigned        fdp             :1;     /* Fixed Data Partitions */
  197.         unsigned        sdp             :1;     /* Should be 0 */
  198.         unsigned        idp             :1;     /* Should be 0 */
  199.         unsigned        psum            :2;     /* Should be 0 */
  200. unsigned        reserved4_012   :3;     /* Reserved */
  201. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  202. unsigned        reserved4_012   :3;     /* Reserved */
  203.         unsigned        psum            :2;     /* Should be 0 */
  204.         unsigned        idp             :1;     /* Should be 0 */
  205.         unsigned        sdp             :1;     /* Should be 0 */
  206.         unsigned        fdp             :1;     /* Fixed Data Partitions */
  207. #else
  208. #error "Please fix <asm/byteorder.h>"
  209. #endif
  210.         u8              mfr;                    /* Medium Format Recognition */
  211.         u8              reserved[2];            /* Reserved */
  212. } osst_medium_partition_page_t;
  214. /*
  215.  *      Capabilities and Mechanical Status Page
  216.  */
  217. typedef struct {
  218. #if   defined(__BIG_ENDIAN_BITFIELD)
  219.         unsigned        reserved1_67    :2;
  220. unsigned        page_code       :6;     /* Page code - Should be 0x2a */
  221. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  222. unsigned        page_code       :6;     /* Page code - Should be 0x2a */
  223.         unsigned        reserved1_67    :2;
  224. #else
  225. #error "Please fix <asm/byteorder.h>"
  226. #endif
  227.         u8              page_length;            /* Page Length - Should be 0x12 */
  228.         u8              reserved2, reserved3;
  229. #if   defined(__BIG_ENDIAN_BITFIELD)
  230.         unsigned        reserved4_67    :2;
  231.         unsigned        sprev           :1;     /* Supports SPACE in the reverse direction */
  232.         unsigned        reserved4_1234  :4;
  233. unsigned        ro              :1;     /* Read Only Mode */
  234. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  235. unsigned        ro              :1;     /* Read Only Mode */
  236.         unsigned        reserved4_1234  :4;
  237.         unsigned        sprev           :1;     /* Supports SPACE in the reverse direction */
  238.         unsigned        reserved4_67    :2;
  239. #else
  240. #error "Please fix <asm/byteorder.h>"
  241. #endif
  242. #if   defined(__BIG_ENDIAN_BITFIELD)
  243.         unsigned        reserved5_67    :2;
  244.         unsigned        qfa             :1;     /* Supports the QFA two partition formats */
  245.         unsigned        reserved5_4     :1;
  246.         unsigned        efmt            :1;     /* Supports ERASE command initiated formatting */
  247. unsigned        reserved5_012   :3;
  248. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  249. unsigned        reserved5_012   :3;
  250.         unsigned        efmt            :1;     /* Supports ERASE command initiated formatting */
  251.         unsigned        reserved5_4     :1;
  252.         unsigned        qfa             :1;     /* Supports the QFA two partition formats */
  253.         unsigned        reserved5_67    :2;
  254. #else
  255. #error "Please fix <asm/byteorder.h>"
  256. #endif
  257. #if   defined(__BIG_ENDIAN_BITFIELD)
  258.         unsigned        cmprs           :1;     /* Supports data compression */
  259.         unsigned        ecc             :1;     /* Supports error correction */
  260. unsigned        reserved6_45    :2;     /* Reserved */  
  261.         unsigned        eject           :1;     /* The device can eject the volume */
  262.         unsigned        prevent         :1;     /* The device defaults in the prevent state after power up */
  263.         unsigned        locked          :1;     /* The volume is locked */
  264. unsigned        lock            :1;     /* Supports locking the volume */
  265. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  266. unsigned        lock            :1;     /* Supports locking the volume */
  267.         unsigned        locked          :1;     /* The volume is locked */
  268.         unsigned        prevent         :1;     /* The device defaults in the prevent state after power up */
  269.         unsigned        eject           :1;     /* The device can eject the volume */
  270. unsigned        reserved6_45    :2;     /* Reserved */  
  271.         unsigned        ecc             :1;     /* Supports error correction */
  272.         unsigned        cmprs           :1;     /* Supports data compression */
  273. #else
  274. #error "Please fix <asm/byteorder.h>"
  275. #endif
  276. #if   defined(__BIG_ENDIAN_BITFIELD)
  277.         unsigned        blk32768        :1;     /* slowb - the device restricts the byte count for PIO */
  278.                                                 /* transfers for slow buffer memory ??? */
  279.                                                 /* Also 32768 block size in some cases */
  280.         unsigned        reserved7_3_6   :4;
  281.         unsigned        blk1024         :1;     /* Supports 1024 bytes block size */
  282.         unsigned        blk512          :1;     /* Supports 512 bytes block size */
  283. unsigned        reserved7_0     :1;
  284. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  285. unsigned        reserved7_0     :1;
  286.         unsigned        blk512          :1;     /* Supports 512 bytes block size */
  287.         unsigned        blk1024         :1;     /* Supports 1024 bytes block size */
  288.         unsigned        reserved7_3_6   :4;
  289.         unsigned        blk32768        :1;     /* slowb - the device restricts the byte count for PIO */
  290.                                                 /* transfers for slow buffer memory ??? */
  291.                                                 /* Also 32768 block size in some cases */
  292. #else
  293. #error "Please fix <asm/byteorder.h>"
  294. #endif
  295.         u16             max_speed;              /* Maximum speed supported in KBps */
  296.         u8              reserved10, reserved11;
  297.         u16             ctl;                    /* Continuous Transfer Limit in blocks */
  298.         u16             speed;                  /* Current Speed, in KBps */
  299.         u16             buffer_size;            /* Buffer Size, in 512 bytes */
  300.         u8              reserved18, reserved19;
  301. } osst_capabilities_page_t;
  303. /*
  304.  *      Block Size Page
  305.  */
  306. typedef struct {
  307. #if   defined(__BIG_ENDIAN_BITFIELD)
  308.         unsigned        ps              :1;
  309.         unsigned        reserved1_6     :1;
  310. unsigned        page_code       :6;     /* Page code - Should be 0x30 */
  311. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  312. unsigned        page_code       :6;     /* Page code - Should be 0x30 */
  313.         unsigned        reserved1_6     :1;
  314.         unsigned        ps              :1;
  315. #else
  316. #error "Please fix <asm/byteorder.h>"
  317. #endif
  318.         u8              page_length;            /* Page Length - Should be 2 */
  319.         u8              reserved2;
  320. #if   defined(__BIG_ENDIAN_BITFIELD)
  321.         unsigned        one             :1;
  322.         unsigned        reserved2_6     :1;
  323.         unsigned        record32_5      :1;
  324.         unsigned        record32        :1;
  325.         unsigned        reserved2_23    :2;
  326.         unsigned        play32_5        :1;
  327. unsigned        play32          :1;
  328. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  329. unsigned        play32          :1;
  330.         unsigned        play32_5        :1;
  331.         unsigned        reserved2_23    :2;
  332.         unsigned        record32        :1;
  333.         unsigned        record32_5      :1;
  334.         unsigned        reserved2_6     :1;
  335.         unsigned        one             :1;
  336. #else
  337. #error "Please fix <asm/byteorder.h>"
  338. #endif
  339. } osst_block_size_page_t;
  341. /*
  342.  * Tape Parameters Page
  343.  */
  344. typedef struct {
  345. #if   defined(__BIG_ENDIAN_BITFIELD)
  346.         unsigned        ps              :1;
  347.         unsigned        reserved1_6     :1;
  348. unsigned        page_code       :6;     /* Page code - Should be 0x2b */
  349. #elif defined(__LITTLE_ENDIAN_BITFIELD)
  350. unsigned        page_code       :6;     /* Page code - Should be 0x2b */
  351.         unsigned        reserved1_6     :1;
  352.         unsigned        ps              :1;
  353. #else
  354. #error "Please fix <asm/byteorder.h>"
  355. #endif
  356. u8 reserved2;
  357. u8 density;
  358. u8 reserved3,reserved4;
  359. u16 segtrk;
  360. u16 trks;
  361. u8 reserved5,reserved6,reserved7,reserved8,reserved9,reserved10;
  362. } osst_tape_paramtr_page_t;
  364. /* OnStream definitions */
  366. #define OS_CONFIG_PARTITION     (0xff)
  367. #define OS_DATA_PARTITION       (0)
  368. #define OS_PARTITION_VERSION    (1)
  370. /*
  371.  * partition
  372.  */
  373. typedef struct os_partition_s {
  374.         __u8    partition_num;
  375.         __u8    par_desc_ver;
  376.         __u16   wrt_pass_cntr;
  377.         __u32   first_frame_ppos;
  378.         __u32   last_frame_ppos;
  379.         __u32   eod_frame_ppos;
  380. } os_partition_t;
  382. /*
  383.  * DAT entry
  384.  */
  385. typedef struct os_dat_entry_s {
  386.         __u32   blk_sz;
  387.         __u16   blk_cnt;
  388.         __u8    flags;
  389.         __u8    reserved;
  390. } os_dat_entry_t;
  392. /*
  393.  * DAT
  394.  */
  395. #define OS_DAT_FLAGS_DATA       (0xc)
  396. #define OS_DAT_FLAGS_MARK       (0x1)
  398. typedef struct os_dat_s {
  399.         __u8            dat_sz;
  400.         __u8            reserved1;
  401.         __u8            entry_cnt;
  402.         __u8            reserved3;
  403.         os_dat_entry_t  dat_list[16];
  404. } os_dat_t;
  406. /*
  407.  * Frame types
  408.  */
  409. #define OS_FRAME_TYPE_FILL      (0)
  410. #define OS_FRAME_TYPE_EOD       (1 << 0)
  411. #define OS_FRAME_TYPE_MARKER    (1 << 1)
  412. #define OS_FRAME_TYPE_HEADER    (1 << 3)
  413. #define OS_FRAME_TYPE_DATA      (1 << 7)
  415. /*
  416.  * AUX
  417.  */
  418. typedef struct os_aux_s {
  419.         __u32           format_id;              /* hardware compability AUX is based on */
  420.         char            application_sig[4];     /* driver used to write this media */
  421.         __u32           hdwr;                   /* reserved */
  422.         __u32           update_frame_cntr;      /* for configuration frame */
  423.         __u8            frame_type;
  424.         __u8            frame_type_reserved;
  425.         __u8            reserved_18_19[2];
  426.         os_partition_t  partition;
  427.         __u8            reserved_36_43[8];
  428.         __u32           frame_seq_num;
  429.         __u32           logical_blk_num_high;
  430.         __u32           logical_blk_num;
  431.         os_dat_t        dat;
  432.         __u8            reserved188_191[4];
  433.         __u32           filemark_cnt;
  434.         __u32           phys_fm;
  435.         __u32           last_mark_ppos;
  436.         __u8            reserved204_223[20];
  438.         /*
  439.          * __u8         app_specific[32];
  440.          *
  441.          * Linux specific fields:
  442.          */
  443.          __u32          next_mark_ppos;         /* when known, points to next marker */
  444.  __u32 last_mark_lbn; /* storing log_blk_num of last mark is extends ADR spec */
  445.          __u8           linux_specific[24];
  447.         __u8            reserved_256_511[256];
  448. } os_aux_t;
  450. #define OS_FM_TAB_MAX 1024
  452. typedef struct os_fm_tab_s {
  453. __u8 fm_part_num;
  454. __u8 reserved_1;
  455. __u8 fm_tab_ent_sz;
  456. __u8 reserved_3;
  457. __u16 fm_tab_ent_cnt;
  458. __u8 reserved6_15[10];
  459. __u32 fm_tab_ent[OS_FM_TAB_MAX];
  460. } os_fm_tab_t;
  462. typedef struct os_ext_trk_ey_s {
  463. __u8 et_part_num;
  464. __u8 fmt;
  465. __u16 fm_tab_off;
  466. __u8 reserved4_7[4];
  467. __u32 last_hlb_hi;
  468. __u32 last_hlb;
  469. __u32 last_pp;
  470. __u8 reserved20_31[12];
  471. } os_ext_trk_ey_t;
  473. typedef struct os_ext_trk_tb_s {
  474. __u8 nr_stream_part;
  475. __u8 reserved_1;
  476. __u8 et_ent_sz;
  477. __u8 reserved3_15[13];
  478. os_ext_trk_ey_t dat_ext_trk_ey;
  479. os_ext_trk_ey_t qfa_ext_trk_ey;
  480. } os_ext_trk_tb_t;
  482. typedef struct os_header_s {
  483.         char            ident_str[8];
  484.         __u8            major_rev;
  485.         __u8            minor_rev;
  486. __u16 ext_trk_tb_off;
  487.         __u8            reserved12_15[4];
  488.         __u8            pt_par_num;
  489.         __u8            pt_reserved1_3[3];
  490.         os_partition_t  partition[16];
  491. __u32 cfg_col_width;
  492. __u32 dat_col_width;
  493. __u32 qfa_col_width;
  494. __u8 cartridge[16];
  495. __u8 reserved304_511[208];
  496. __u32 old_filemark_list[16680/4]; /* in ADR 1.4 __u8 track_table[16680] */
  497. os_ext_trk_tb_t ext_track_tb;
  498. __u8 reserved17272_17735[464];
  499. os_fm_tab_t dat_fm_tab;
  500. os_fm_tab_t qfa_fm_tab;
  501. __u8 reserved25960_32767[6808];
  502. } os_header_t;
  505. /*
  506.  * OnStream ADRL frame
  507.  */
  508. #define OS_FRAME_SIZE   (32 * 1024 + 512)
  509. #define OS_DATA_SIZE    (32 * 1024)
  510. #define OS_AUX_SIZE     (512)
  511. //#define OSST_MAX_SG      2
  513. /* The tape buffer descriptor. */
  514. typedef struct {
  515.   unsigned char in_use;
  516.   unsigned char dma; /* DMA-able buffer */
  517.   int buffer_size;
  518.   int buffer_blocks;
  519.   int buffer_bytes;
  520.   int read_pointer;
  521.   int writing;
  522.   int midlevel_result;
  523.   int syscall_result;
  524.   Scsi_Request *last_SRpnt;
  525.   unsigned char *b_data;
  526.   os_aux_t *aux;               /* onstream AUX structure at end of each block */
  527.   unsigned short use_sg;       /* zero or number of segments for this adapter */
  528.   unsigned short sg_segs;      /* total number of allocated segments */
  529.   unsigned short orig_sg_segs; /* number of segments allocated at first try */
  530.   struct scatterlist sg[1];    /* MUST BE last item */
  531. } OSST_buffer;
  533. /* The tape drive descriptor */
  534. typedef struct {
  535.   kdev_t devt;
  536.   unsigned capacity;
  537.   Scsi_Device* device;
  538.   struct semaphore lock;       /* for serialization */
  539.   struct completion wait;      /* for SCSI commands */
  540.   OSST_buffer * buffer;
  542.   /* Drive characteristics */
  543.   unsigned char omit_blklims;
  544.   unsigned char do_auto_lock;
  545.   unsigned char can_bsr;
  546.   unsigned char can_partitions;
  547.   unsigned char two_fm;
  548.   unsigned char fast_mteom;
  549.   unsigned char restr_dma;
  550.   unsigned char scsi2_logical;
  551.   unsigned char default_drvbuffer;  /* 0xff = don't touch, value 3 bits */
  552.   int write_threshold;
  553.   int timeout; /* timeout for normal commands */
  554.   int long_timeout; /* timeout for commands known to take long time*/
  556.   /* Mode characteristics */
  557.   ST_mode modes[ST_NBR_MODES];
  558.   int current_mode;
  559. #ifdef CONFIG_DEVFS_FS
  560.   devfs_handle_t de_r[ST_NBR_MODES];  /*  Rewind entries     */
  561.   devfs_handle_t de_n[ST_NBR_MODES];  /*  No-rewind entries  */
  562. #endif
  564.   /* Status variables */
  565.   int partition;
  566.   int new_partition;
  567.   int nbr_partitions;    /* zero until partition support enabled */
  568.   ST_partstat ps[ST_NBR_PARTITIONS];
  569.   unsigned char dirty;
  570.   unsigned char ready;
  571.   unsigned char write_prot;
  572.   unsigned char drv_write_prot;
  573.   unsigned char in_use;
  574.   unsigned char blksize_changed;
  575.   unsigned char density_changed;
  576.   unsigned char compression_changed;
  577.   unsigned char drv_buffer;
  578.   unsigned char density;
  579.   unsigned char door_locked;
  580.   unsigned char rew_at_close;
  581.   unsigned char inited;
  582.   int block_size;
  583.   int min_block;
  584.   int max_block;
  585.   int recover_count;            /* from tape opening */
  586.   int write_count;
  587.   int read_count;
  588.   int recover_erreg;            /* from last status call */
  589.   /*
  590.    * OnStream specific data
  591.    */
  592.   int    os_fw_rev;        /* the firmware revision * 10000 */
  593.   unsigned char  raw;                          /* flag OnStream raw access (32.5KB block size) */
  594.   unsigned char  poll;                         /* flag that this drive needs polling (IDE|firmware) */
  595.   unsigned char  frame_in_buffer;        /* flag that the frame as per frame_seq_number
  596. * has been read into STp->buffer and is valid */
  597.   int      frame_seq_number;                   /* logical frame number */
  598.   int      logical_blk_num;                    /* logical block number */
  599.   unsigned first_frame_position;               /* physical frame to be transferred to/from host */
  600.   unsigned last_frame_position;                /* physical frame to be transferd to/from tape */
  601.   int      cur_frames;                         /* current number of frames in internal buffer */
  602.   int      max_frames;                         /* max number of frames in internal buffer */
  603.   char     application_sig[5];                 /* application signature */
  604.   unsigned char  fast_open;                    /* flag that reminds us we didn't check headers at open */
  605.   unsigned short wrt_pass_cntr;                /* write pass counter */
  606.   int      update_frame_cntr;                  /* update frame counter */
  607.   int      onstream_write_error;               /* write error recovery active */
  608.   int      header_ok;                          /* header frame verified ok */
  609.   int      linux_media;                        /* reading linux-specifc media */
  610.   int      linux_media_version;
  611.   os_header_t * header_cache;        /* cache is kept for filemark positions */
  612.   int      filemark_cnt;
  613.   int      first_mark_ppos;
  614.   int      last_mark_ppos;
  615.   int      last_mark_lbn; /* storing log_blk_num of last mark is extends ADR spec */
  616.   int      first_data_ppos;
  617.   int      eod_frame_ppos;
  618.   int      eod_frame_lfa;
  619.   int      write_type; /* used in write error recovery */
  620.   int      read_error_frame; /* used in read error recovery */
  621.   unsigned long cmd_start_time;
  622.   unsigned long max_cmd_time;
  624. #if DEBUG
  625.   unsigned char write_pending;
  626.   int nbr_finished;
  627.   int nbr_waits;
  628.   unsigned char last_cmnd[6];
  629.   unsigned char last_sense[16];
  630. #endif
  631. } OS_Scsi_Tape;
  633. /* Values of write_type */
  634. #define OS_WRITE_DATA      0
  635. #define OS_WRITE_EOD       1
  636. #define OS_WRITE_NEW_MARK  2
  637. #define OS_WRITE_LAST_MARK 3
  638. #define OS_WRITE_HEADER    4
  639. #define OS_WRITE_FILLER    5
  641. /* Additional rw state */
  642. #define OS_WRITING_COMPLETE 3