| /* |
| * $Header: /cvsroot/osst/Driver/osst.h,v 1.16 2005/01/01 21:13:35 wriede Exp $ |
| */ |
| |
| #include <asm/byteorder.h> |
| #include <linux/completion.h> |
| #include <linux/mutex.h> |
| |
| /* FIXME - rename and use the following two types or delete them! |
| * and the types really should go to st.h anyway... |
| * INQUIRY packet command - Data Format (From Table 6-8 of QIC-157C) |
| */ |
| typedef struct { |
| unsigned device_type :5; /* Peripheral Device Type */ |
| unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ |
| unsigned reserved1_6t0 :7; /* Reserved */ |
| unsigned rmb :1; /* Removable Medium Bit */ |
| unsigned ansi_version :3; /* ANSI Version */ |
| unsigned ecma_version :3; /* ECMA Version */ |
| unsigned iso_version :2; /* ISO Version */ |
| unsigned response_format :4; /* Response Data Format */ |
| unsigned reserved3_45 :2; /* Reserved */ |
| unsigned reserved3_6 :1; /* TrmIOP - Reserved */ |
| unsigned reserved3_7 :1; /* AENC - Reserved */ |
| u8 additional_length; /* Additional Length (total_length-4) */ |
| u8 rsv5, rsv6, rsv7; /* Reserved */ |
| u8 vendor_id[8]; /* Vendor Identification */ |
| u8 product_id[16]; /* Product Identification */ |
| u8 revision_level[4]; /* Revision Level */ |
| u8 vendor_specific[20]; /* Vendor Specific - Optional */ |
| u8 reserved56t95[40]; /* Reserved - Optional */ |
| /* Additional information may be returned */ |
| } idetape_inquiry_result_t; |
| |
| /* |
| * READ POSITION packet command - Data Format (From Table 6-57) |
| */ |
| typedef struct { |
| unsigned reserved0_10 :2; /* Reserved */ |
| unsigned bpu :1; /* Block Position Unknown */ |
| unsigned reserved0_543 :3; /* Reserved */ |
| unsigned eop :1; /* End Of Partition */ |
| unsigned bop :1; /* Beginning Of Partition */ |
| u8 partition; /* Partition Number */ |
| u8 reserved2, reserved3; /* Reserved */ |
| u32 first_block; /* First Block Location */ |
| u32 last_block; /* Last Block Location (Optional) */ |
| u8 reserved12; /* Reserved */ |
| u8 blocks_in_buffer[3]; /* Blocks In Buffer - (Optional) */ |
| u32 bytes_in_buffer; /* Bytes In Buffer (Optional) */ |
| } idetape_read_position_result_t; |
| |
| /* |
| * Follows structures which are related to the SELECT SENSE / MODE SENSE |
| * packet commands. |
| */ |
| #define COMPRESSION_PAGE 0x0f |
| #define COMPRESSION_PAGE_LENGTH 16 |
| |
| #define CAPABILITIES_PAGE 0x2a |
| #define CAPABILITIES_PAGE_LENGTH 20 |
| |
| #define TAPE_PARAMTR_PAGE 0x2b |
| #define TAPE_PARAMTR_PAGE_LENGTH 16 |
| |
| #define NUMBER_RETRIES_PAGE 0x2f |
| #define NUMBER_RETRIES_PAGE_LENGTH 4 |
| |
| #define BLOCK_SIZE_PAGE 0x30 |
| #define BLOCK_SIZE_PAGE_LENGTH 4 |
| |
| #define BUFFER_FILLING_PAGE 0x33 |
| #define BUFFER_FILLING_PAGE_LENGTH 4 |
| |
| #define VENDOR_IDENT_PAGE 0x36 |
| #define VENDOR_IDENT_PAGE_LENGTH 8 |
| |
| #define LOCATE_STATUS_PAGE 0x37 |
| #define LOCATE_STATUS_PAGE_LENGTH 0 |
| |
| #define MODE_HEADER_LENGTH 4 |
| |
| |
| /* |
| * REQUEST SENSE packet command result - Data Format. |
| */ |
| typedef struct { |
| unsigned error_code :7; /* Current of deferred errors */ |
| unsigned valid :1; /* The information field conforms to QIC-157C */ |
| u8 reserved1 :8; /* Segment Number - Reserved */ |
| unsigned sense_key :4; /* Sense Key */ |
| unsigned reserved2_4 :1; /* Reserved */ |
| unsigned ili :1; /* Incorrect Length Indicator */ |
| unsigned eom :1; /* End Of Medium */ |
| unsigned filemark :1; /* Filemark */ |
| u32 information __attribute__ ((packed)); |
| u8 asl; /* Additional sense length (n-7) */ |
| u32 command_specific; /* Additional command specific information */ |
| u8 asc; /* Additional Sense Code */ |
| u8 ascq; /* Additional Sense Code Qualifier */ |
| u8 replaceable_unit_code; /* Field Replaceable Unit Code */ |
| unsigned sk_specific1 :7; /* Sense Key Specific */ |
| unsigned sksv :1; /* Sense Key Specific information is valid */ |
| u8 sk_specific2; /* Sense Key Specific */ |
| u8 sk_specific3; /* Sense Key Specific */ |
| u8 pad[2]; /* Padding to 20 bytes */ |
| } idetape_request_sense_result_t; |
| |
| /* |
| * Mode Parameter Header for the MODE SENSE packet command |
| */ |
| typedef struct { |
| u8 mode_data_length; /* Length of the following data transfer */ |
| u8 medium_type; /* Medium Type */ |
| u8 dsp; /* Device Specific Parameter */ |
| u8 bdl; /* Block Descriptor Length */ |
| } osst_mode_parameter_header_t; |
| |
| /* |
| * Mode Parameter Block Descriptor the MODE SENSE packet command |
| * |
| * Support for block descriptors is optional. |
| */ |
| typedef struct { |
| u8 density_code; /* Medium density code */ |
| u8 blocks[3]; /* Number of blocks */ |
| u8 reserved4; /* Reserved */ |
| u8 length[3]; /* Block Length */ |
| } osst_parameter_block_descriptor_t; |
| |
| /* |
| * The Data Compression Page, as returned by the MODE SENSE packet command. |
| */ |
| typedef struct { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned ps :1; |
| unsigned reserved0 :1; /* Reserved */ |
| unsigned page_code :6; /* Page Code - Should be 0xf */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned page_code :6; /* Page Code - Should be 0xf */ |
| unsigned reserved0 :1; /* Reserved */ |
| unsigned ps :1; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u8 page_length; /* Page Length - Should be 14 */ |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned dce :1; /* Data Compression Enable */ |
| unsigned dcc :1; /* Data Compression Capable */ |
| unsigned reserved2 :6; /* Reserved */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned reserved2 :6; /* Reserved */ |
| unsigned dcc :1; /* Data Compression Capable */ |
| unsigned dce :1; /* Data Compression Enable */ |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned dde :1; /* Data Decompression Enable */ |
| unsigned red :2; /* Report Exception on Decompression */ |
| unsigned reserved3 :5; /* Reserved */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned reserved3 :5; /* Reserved */ |
| unsigned red :2; /* Report Exception on Decompression */ |
| unsigned dde :1; /* Data Decompression Enable */ |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u32 ca; /* Compression Algorithm */ |
| u32 da; /* Decompression Algorithm */ |
| u8 reserved[4]; /* Reserved */ |
| } osst_data_compression_page_t; |
| |
| /* |
| * The Medium Partition Page, as returned by the MODE SENSE packet command. |
| */ |
| typedef struct { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned ps :1; |
| unsigned reserved1_6 :1; /* Reserved */ |
| unsigned page_code :6; /* Page Code - Should be 0x11 */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned page_code :6; /* Page Code - Should be 0x11 */ |
| unsigned reserved1_6 :1; /* Reserved */ |
| unsigned ps :1; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u8 page_length; /* Page Length - Should be 6 */ |
| u8 map; /* Maximum Additional Partitions - Should be 0 */ |
| u8 apd; /* Additional Partitions Defined - Should be 0 */ |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned fdp :1; /* Fixed Data Partitions */ |
| unsigned sdp :1; /* Should be 0 */ |
| unsigned idp :1; /* Should be 0 */ |
| unsigned psum :2; /* Should be 0 */ |
| unsigned reserved4_012 :3; /* Reserved */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned reserved4_012 :3; /* Reserved */ |
| unsigned psum :2; /* Should be 0 */ |
| unsigned idp :1; /* Should be 0 */ |
| unsigned sdp :1; /* Should be 0 */ |
| unsigned fdp :1; /* Fixed Data Partitions */ |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u8 mfr; /* Medium Format Recognition */ |
| u8 reserved[2]; /* Reserved */ |
| } osst_medium_partition_page_t; |
| |
| /* |
| * Capabilities and Mechanical Status Page |
| */ |
| typedef struct { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned reserved1_67 :2; |
| unsigned page_code :6; /* Page code - Should be 0x2a */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned page_code :6; /* Page code - Should be 0x2a */ |
| unsigned reserved1_67 :2; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u8 page_length; /* Page Length - Should be 0x12 */ |
| u8 reserved2, reserved3; |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned reserved4_67 :2; |
| unsigned sprev :1; /* Supports SPACE in the reverse direction */ |
| unsigned reserved4_1234 :4; |
| unsigned ro :1; /* Read Only Mode */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned ro :1; /* Read Only Mode */ |
| unsigned reserved4_1234 :4; |
| unsigned sprev :1; /* Supports SPACE in the reverse direction */ |
| unsigned reserved4_67 :2; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned reserved5_67 :2; |
| unsigned qfa :1; /* Supports the QFA two partition formats */ |
| unsigned reserved5_4 :1; |
| unsigned efmt :1; /* Supports ERASE command initiated formatting */ |
| unsigned reserved5_012 :3; |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned reserved5_012 :3; |
| unsigned efmt :1; /* Supports ERASE command initiated formatting */ |
| unsigned reserved5_4 :1; |
| unsigned qfa :1; /* Supports the QFA two partition formats */ |
| unsigned reserved5_67 :2; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned cmprs :1; /* Supports data compression */ |
| unsigned ecc :1; /* Supports error correction */ |
| unsigned reserved6_45 :2; /* Reserved */ |
| unsigned eject :1; /* The device can eject the volume */ |
| unsigned prevent :1; /* The device defaults in the prevent state after power up */ |
| unsigned locked :1; /* The volume is locked */ |
| unsigned lock :1; /* Supports locking the volume */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned lock :1; /* Supports locking the volume */ |
| unsigned locked :1; /* The volume is locked */ |
| unsigned prevent :1; /* The device defaults in the prevent state after power up */ |
| unsigned eject :1; /* The device can eject the volume */ |
| unsigned reserved6_45 :2; /* Reserved */ |
| unsigned ecc :1; /* Supports error correction */ |
| unsigned cmprs :1; /* Supports data compression */ |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned blk32768 :1; /* slowb - the device restricts the byte count for PIO */ |
| /* transfers for slow buffer memory ??? */ |
| /* Also 32768 block size in some cases */ |
| unsigned reserved7_3_6 :4; |
| unsigned blk1024 :1; /* Supports 1024 bytes block size */ |
| unsigned blk512 :1; /* Supports 512 bytes block size */ |
| unsigned reserved7_0 :1; |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned reserved7_0 :1; |
| unsigned blk512 :1; /* Supports 512 bytes block size */ |
| unsigned blk1024 :1; /* Supports 1024 bytes block size */ |
| unsigned reserved7_3_6 :4; |
| unsigned blk32768 :1; /* slowb - the device restricts the byte count for PIO */ |
| /* transfers for slow buffer memory ??? */ |
| /* Also 32768 block size in some cases */ |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| __be16 max_speed; /* Maximum speed supported in KBps */ |
| u8 reserved10, reserved11; |
| __be16 ctl; /* Continuous Transfer Limit in blocks */ |
| __be16 speed; /* Current Speed, in KBps */ |
| __be16 buffer_size; /* Buffer Size, in 512 bytes */ |
| u8 reserved18, reserved19; |
| } osst_capabilities_page_t; |
| |
| /* |
| * Block Size Page |
| */ |
| typedef struct { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned ps :1; |
| unsigned reserved1_6 :1; |
| unsigned page_code :6; /* Page code - Should be 0x30 */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned page_code :6; /* Page code - Should be 0x30 */ |
| unsigned reserved1_6 :1; |
| unsigned ps :1; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u8 page_length; /* Page Length - Should be 2 */ |
| u8 reserved2; |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned one :1; |
| unsigned reserved2_6 :1; |
| unsigned record32_5 :1; |
| unsigned record32 :1; |
| unsigned reserved2_23 :2; |
| unsigned play32_5 :1; |
| unsigned play32 :1; |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned play32 :1; |
| unsigned play32_5 :1; |
| unsigned reserved2_23 :2; |
| unsigned record32 :1; |
| unsigned record32_5 :1; |
| unsigned reserved2_6 :1; |
| unsigned one :1; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| } osst_block_size_page_t; |
| |
| /* |
| * Tape Parameters Page |
| */ |
| typedef struct { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned ps :1; |
| unsigned reserved1_6 :1; |
| unsigned page_code :6; /* Page code - Should be 0x2b */ |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned page_code :6; /* Page code - Should be 0x2b */ |
| unsigned reserved1_6 :1; |
| unsigned ps :1; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| u8 reserved2; |
| u8 density; |
| u8 reserved3,reserved4; |
| __be16 segtrk; |
| __be16 trks; |
| u8 reserved5,reserved6,reserved7,reserved8,reserved9,reserved10; |
| } osst_tape_paramtr_page_t; |
| |
| /* OnStream definitions */ |
| |
| #define OS_CONFIG_PARTITION (0xff) |
| #define OS_DATA_PARTITION (0) |
| #define OS_PARTITION_VERSION (1) |
| |
| /* |
| * partition |
| */ |
| typedef struct os_partition_s { |
| __u8 partition_num; |
| __u8 par_desc_ver; |
| __be16 wrt_pass_cntr; |
| __be32 first_frame_ppos; |
| __be32 last_frame_ppos; |
| __be32 eod_frame_ppos; |
| } os_partition_t; |
| |
| /* |
| * DAT entry |
| */ |
| typedef struct os_dat_entry_s { |
| __be32 blk_sz; |
| __be16 blk_cnt; |
| __u8 flags; |
| __u8 reserved; |
| } os_dat_entry_t; |
| |
| /* |
| * DAT |
| */ |
| #define OS_DAT_FLAGS_DATA (0xc) |
| #define OS_DAT_FLAGS_MARK (0x1) |
| |
| typedef struct os_dat_s { |
| __u8 dat_sz; |
| __u8 reserved1; |
| __u8 entry_cnt; |
| __u8 reserved3; |
| os_dat_entry_t dat_list[16]; |
| } os_dat_t; |
| |
| /* |
| * Frame types |
| */ |
| #define OS_FRAME_TYPE_FILL (0) |
| #define OS_FRAME_TYPE_EOD (1 << 0) |
| #define OS_FRAME_TYPE_MARKER (1 << 1) |
| #define OS_FRAME_TYPE_HEADER (1 << 3) |
| #define OS_FRAME_TYPE_DATA (1 << 7) |
| |
| /* |
| * AUX |
| */ |
| typedef struct os_aux_s { |
| __be32 format_id; /* hardware compatibility AUX is based on */ |
| char application_sig[4]; /* driver used to write this media */ |
| __be32 hdwr; /* reserved */ |
| __be32 update_frame_cntr; /* for configuration frame */ |
| __u8 frame_type; |
| __u8 frame_type_reserved; |
| __u8 reserved_18_19[2]; |
| os_partition_t partition; |
| __u8 reserved_36_43[8]; |
| __be32 frame_seq_num; |
| __be32 logical_blk_num_high; |
| __be32 logical_blk_num; |
| os_dat_t dat; |
| __u8 reserved188_191[4]; |
| __be32 filemark_cnt; |
| __be32 phys_fm; |
| __be32 last_mark_ppos; |
| __u8 reserved204_223[20]; |
| |
| /* |
| * __u8 app_specific[32]; |
| * |
| * Linux specific fields: |
| */ |
| __be32 next_mark_ppos; /* when known, points to next marker */ |
| __be32 last_mark_lbn; /* storing log_blk_num of last mark is extends ADR spec */ |
| __u8 linux_specific[24]; |
| |
| __u8 reserved_256_511[256]; |
| } os_aux_t; |
| |
| #define OS_FM_TAB_MAX 1024 |
| |
| typedef struct os_fm_tab_s { |
| __u8 fm_part_num; |
| __u8 reserved_1; |
| __u8 fm_tab_ent_sz; |
| __u8 reserved_3; |
| __be16 fm_tab_ent_cnt; |
| __u8 reserved6_15[10]; |
| __be32 fm_tab_ent[OS_FM_TAB_MAX]; |
| } os_fm_tab_t; |
| |
| typedef struct os_ext_trk_ey_s { |
| __u8 et_part_num; |
| __u8 fmt; |
| __be16 fm_tab_off; |
| __u8 reserved4_7[4]; |
| __be32 last_hlb_hi; |
| __be32 last_hlb; |
| __be32 last_pp; |
| __u8 reserved20_31[12]; |
| } os_ext_trk_ey_t; |
| |
| typedef struct os_ext_trk_tb_s { |
| __u8 nr_stream_part; |
| __u8 reserved_1; |
| __u8 et_ent_sz; |
| __u8 reserved3_15[13]; |
| os_ext_trk_ey_t dat_ext_trk_ey; |
| os_ext_trk_ey_t qfa_ext_trk_ey; |
| } os_ext_trk_tb_t; |
| |
| typedef struct os_header_s { |
| char ident_str[8]; |
| __u8 major_rev; |
| __u8 minor_rev; |
| __be16 ext_trk_tb_off; |
| __u8 reserved12_15[4]; |
| __u8 pt_par_num; |
| __u8 pt_reserved1_3[3]; |
| os_partition_t partition[16]; |
| __be32 cfg_col_width; |
| __be32 dat_col_width; |
| __be32 qfa_col_width; |
| __u8 cartridge[16]; |
| __u8 reserved304_511[208]; |
| __be32 old_filemark_list[16680/4]; /* in ADR 1.4 __u8 track_table[16680] */ |
| os_ext_trk_tb_t ext_track_tb; |
| __u8 reserved17272_17735[464]; |
| os_fm_tab_t dat_fm_tab; |
| os_fm_tab_t qfa_fm_tab; |
| __u8 reserved25960_32767[6808]; |
| } os_header_t; |
| |
| |
| /* |
| * OnStream ADRL frame |
| */ |
| #define OS_FRAME_SIZE (32 * 1024 + 512) |
| #define OS_DATA_SIZE (32 * 1024) |
| #define OS_AUX_SIZE (512) |
| //#define OSST_MAX_SG 2 |
| |
| /* The OnStream tape buffer descriptor. */ |
| struct osst_buffer { |
| unsigned char in_use; |
| unsigned char dma; /* DMA-able buffer */ |
| int buffer_size; |
| int buffer_blocks; |
| int buffer_bytes; |
| int read_pointer; |
| int writing; |
| int midlevel_result; |
| int syscall_result; |
| struct osst_request *last_SRpnt; |
| struct st_cmdstatus cmdstat; |
| struct rq_map_data map_data; |
| unsigned char *b_data; |
| os_aux_t *aux; /* onstream AUX structure at end of each block */ |
| unsigned short use_sg; /* zero or number of s/g segments for this adapter */ |
| unsigned short sg_segs; /* number of segments in s/g list */ |
| unsigned short orig_sg_segs; /* number of segments allocated at first try */ |
| struct scatterlist sg[1]; /* MUST BE last item */ |
| } ; |
| |
| /* The OnStream tape drive descriptor */ |
| struct osst_tape { |
| struct scsi_driver *driver; |
| unsigned capacity; |
| struct scsi_device *device; |
| struct mutex lock; /* for serialization */ |
| struct completion wait; /* for SCSI commands */ |
| struct osst_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 restr_dma; |
| unsigned char scsi2_logical; |
| unsigned char default_drvbuffer; /* 0xff = don't touch, value 3 bits */ |
| unsigned char pos_unknown; /* after reset position unknown */ |
| int write_threshold; |
| int timeout; /* timeout for normal commands */ |
| int long_timeout; /* timeout for commands known to take long time*/ |
| |
| /* 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 rew_at_close; |
| unsigned char inited; |
| int block_size; |
| int min_block; |
| int max_block; |
| int recover_count; /* from tape opening */ |
| int abort_count; |
| int write_count; |
| int read_count; |
| int recover_erreg; /* from last status call */ |
| /* |
| * OnStream specific data |
| */ |
| int os_fw_rev; /* the firmware revision * 10000 */ |
| unsigned char raw; /* flag OnStream raw access (32.5KB block size) */ |
| unsigned char poll; /* flag that this drive needs polling (IDE|firmware) */ |
| unsigned char frame_in_buffer; /* flag that the frame as per frame_seq_number |
| * has been read into STp->buffer and is valid */ |
| int frame_seq_number; /* logical frame number */ |
| int logical_blk_num; /* logical block number */ |
| unsigned first_frame_position; /* physical frame to be transferred to/from host */ |
| unsigned last_frame_position; /* physical frame to be transferd to/from tape */ |
| int cur_frames; /* current number of frames in internal buffer */ |
| int max_frames; /* max number of frames in internal buffer */ |
| char application_sig[5]; /* application signature */ |
| unsigned char fast_open; /* flag that reminds us we didn't check headers at open */ |
| unsigned short wrt_pass_cntr; /* write pass counter */ |
| int update_frame_cntr; /* update frame counter */ |
| int onstream_write_error; /* write error recovery active */ |
| int header_ok; /* header frame verified ok */ |
| int linux_media; /* reading linux-specifc media */ |
| int linux_media_version; |
| os_header_t * header_cache; /* cache is kept for filemark positions */ |
| int filemark_cnt; |
| int first_mark_ppos; |
| int last_mark_ppos; |
| int last_mark_lbn; /* storing log_blk_num of last mark is extends ADR spec */ |
| int first_data_ppos; |
| int eod_frame_ppos; |
| int eod_frame_lfa; |
| int write_type; /* used in write error recovery */ |
| int read_error_frame; /* used in read error recovery */ |
| unsigned long cmd_start_time; |
| unsigned long max_cmd_time; |
| |
| #if DEBUG |
| unsigned char write_pending; |
| int nbr_finished; |
| int nbr_waits; |
| unsigned char last_cmnd[6]; |
| unsigned char last_sense[16]; |
| #endif |
| struct gendisk *drive; |
| } ; |
| |
| /* scsi tape command */ |
| struct osst_request { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| unsigned char sense[SCSI_SENSE_BUFFERSIZE]; |
| int result; |
| struct osst_tape *stp; |
| struct completion *waiting; |
| struct bio *bio; |
| }; |
| |
| /* Values of write_type */ |
| #define OS_WRITE_DATA 0 |
| #define OS_WRITE_EOD 1 |
| #define OS_WRITE_NEW_MARK 2 |
| #define OS_WRITE_LAST_MARK 3 |
| #define OS_WRITE_HEADER 4 |
| #define OS_WRITE_FILLER 5 |
| |
| /* Additional rw state */ |
| #define OS_WRITING_COMPLETE 3 |
