diff options
Diffstat (limited to 'drivers/scsi/st.h')
| -rw-r--r-- | drivers/scsi/st.h | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/drivers/scsi/st.h b/drivers/scsi/st.h index b92712f9593..f3eee0f9f40 100644 --- a/drivers/scsi/st.h +++ b/drivers/scsi/st.h @@ -29,13 +29,14 @@ struct st_request { int result; struct scsi_tape *stp; struct completion *waiting; + struct bio *bio; }; /* The tape buffer descriptor. */ struct st_buffer { unsigned char dma; /* DMA-able buffer */ - unsigned char do_dio; /* direct i/o set up? */ unsigned char cleared; /* internal buffer cleared after open? */ + unsigned short do_dio; /* direct i/o set up? */ int buffer_size; int buffer_blocks; int buffer_bytes; @@ -44,20 +45,14 @@ struct st_buffer { int syscall_result; struct st_request *last_SRpnt; struct st_cmdstatus cmdstat; + struct page **reserved_pages; + int reserved_page_order; + struct page **mapped_pages; + struct rq_map_data map_data; 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 */ @@ -71,6 +66,8 @@ struct st_modedef { 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 scsi_tape *tape; + struct device *devs[2]; /* Auto-rewind and non-rewind devices */ struct cdev *cdevs[2]; /* Auto-rewind and non-rewind devices */ }; @@ -81,7 +78,7 @@ struct st_modedef { #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_TAPES (1 << (20 - (ST_NBR_MODE_BITS + 1))) #define ST_MAX_TAPE_ENTRIES (ST_MAX_TAPES << (ST_NBR_MODE_BITS + 1)) /* The status related to each partition */ @@ -104,6 +101,7 @@ struct scsi_tape { struct mutex lock; /* For serialization */ struct completion wait; /* For SCSI commands */ struct st_buffer *buffer; + int index; /* Drive characteristics */ unsigned char omit_blklims; @@ -125,6 +123,7 @@ struct scsi_tape { unsigned char c_algo; /* compression algorithm */ unsigned char pos_unknown; /* after reset position unknown */ unsigned char sili; /* use SILI when reading in variable b mode */ + unsigned char immediate_filemark; /* write filemark immediately */ int tape_type; int long_timeout; /* timeout for commands known to take long time */ |