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linux/drivers/scsi/osst.h
Willem Riede 5e6575c051 [SCSI] osst: changes required to move forward to block request 
On 02/07/2006 04:12:55 AM, Christoph Hellwig wrote:
> On Mon, Feb 06, 2006 at 08:02:21PM -0500, Willem Riede wrote:
>
> > But I will certainly help retire scsi_request. And anything else that is
> > needed to keep up with proper kernel style. Let me know what those are, if
> > you  would? I'll start looking at how st has changed, and will be back with
> > any  questions I may have.
>
> right now the above is the most urgent bit.  What would be nice but not
> required is a conversion to the sense handling helpers, similar to what
> st got (aka using the *normalize_sense functions and then dealing with the
> parsed sense buffer instead of the raw sense data)

Ok, so here is my first take at satisfying this request.
Be warned, that beyond compiling, and checking that the new module
doesn't immediately blow up, there hasn't yet been a lot of testing.

But this should allow you to comment on the changes, and move forward
with dropping scsi_request from the kernel code.

Signed-off-by: Willem Riede <osst@riede.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-03-07 09:16:01 -06:00

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/*
* $Header: /cvsroot/osst/Driver/osst.h,v 1.16 2005/01/01 21:13:35 wriede Exp $
*/
#include <asm/byteorder.h>
#include <linux/config.h>
#include <linux/completion.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
u16 max_speed; /* Maximum speed supported in KBps */
u8 reserved10, reserved11;
u16 ctl; /* Continuous Transfer Limit in blocks */
u16 speed; /* Current Speed, in KBps */
u16 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;
u16 segtrk;
u16 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;
__u16 wrt_pass_cntr;
__u32 first_frame_ppos;
__u32 last_frame_ppos;
__u32 eod_frame_ppos;
} os_partition_t;
/*
* DAT entry
*/
typedef struct os_dat_entry_s {
__u32 blk_sz;
__u16 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 {
__u32 format_id; /* hardware compability AUX is based on */
char application_sig[4]; /* driver used to write this media */
__u32 hdwr; /* reserved */
__u32 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];
__u32 frame_seq_num;
__u32 logical_blk_num_high;
__u32 logical_blk_num;
os_dat_t dat;
__u8 reserved188_191[4];
__u32 filemark_cnt;
__u32 phys_fm;
__u32 last_mark_ppos;
__u8 reserved204_223[20];
/*
* __u8 app_specific[32];
*
* Linux specific fields:
*/
__u32 next_mark_ppos; /* when known, points to next marker */
__u32 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;
__u16 fm_tab_ent_cnt;
__u8 reserved6_15[10];
__u32 fm_tab_ent[OS_FM_TAB_MAX];
} os_fm_tab_t;
typedef struct os_ext_trk_ey_s {
__u8 et_part_num;
__u8 fmt;
__u16 fm_tab_off;
__u8 reserved4_7[4];
__u32 last_hlb_hi;
__u32 last_hlb;
__u32 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;
__u16 ext_trk_tb_off;
__u8 reserved12_15[4];
__u8 pt_par_num;
__u8 pt_reserved1_3[3];
os_partition_t partition[16];
__u32 cfg_col_width;
__u32 dat_col_width;
__u32 qfa_col_width;
__u8 cartridge[16];
__u8 reserved304_511[208];
__u32 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;
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 semaphore 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;
};
/* 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
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