linux-toradex.git/include/linux/blkdev.h, branch v2.6.16.15

[BLOCK] ll_rw_blk: make max_sectors and max_hw_sectors unsigned ints

2006-01-24T09:06:19+00:00

IDE lba48 can support full 64k request size, which overflows the
max_hw_sectors variable.

Signed-off-by: Jens Axboe

Merge branch 'blk-softirq' of git://brick.kernel.dk/data/git/linux-2.6-block

2006-01-09T17:26:40+00:00

Manual merge for trivial #include changes

[BLOCK] ll_rw_blk: Enable out-of-order request completions through softirq

2006-01-09T15:02:34+00:00

Request completion can be a quite heavy process, since it needs to
iterate through the entire request and complete the bio's it holds.
This patch adds blk_complete_request() which moves this processing
into a dedicated block softirq.

Signed-off-by: Jens Axboe

[BLOCK] Kill blk_attempt_remerge()

2006-01-09T14:30:20+00:00

It's a broken interface, it's done way too late. And apparently it triggers
slab problems in recent kernels as well (most likely after the generic dispatch
code was merged). So kill it, ide-cd is the only user of it.

Signed-off-by: Jens Axboe

[BLOCK] Correct blk_execute_rq_nowait() prototype

2006-01-06T09:00:50+00:00

[BLOCK] reimplement handling of barrier request

2006-01-06T08:51:03+00:00

Reimplement handling of barrier requests.

* Flexible handling to deal with various capabilities of
  target devices.
* Retry support for falling back.
* Tagged queues which don't support ordered tag can do ordered.

Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe

[BLOCK] add @uptodate to end_that_request_last() and @error to rq_end_io_fn()

2006-01-06T08:49:03+00:00

add @uptodate argument to end_that_request_last() and @error
to rq_end_io_fn().  there's no generic way to pass error code
to request completion function, making generic error handling
of non-fs request difficult (rq->errors is driver-specific and
each driver uses it differently).  this patch adds @uptodate
to end_that_request_last() and @error to rq_end_io_fn().

for fs requests, this doesn't really matter, so just using the
same uptodate argument used in the last call to
end_that_request_first() should suffice.  imho, this can also
help the generic command-carrying request jens is working on.

Signed-off-by: tejun heo 
Signed-Off-By: Jens Axboe

[SCSI] seperate max_sectors from max_hw_sectors

2005-12-15T23:11:40+00:00

- export __blk_put_request and blk_execute_rq_nowait
needed for async REQ_BLOCK_PC requests
- seperate max_hw_sectors and max_sectors for block/scsi_ioctl.c and
SG_IO bio.c helpers per Jens's last comments. Since block/scsi_ioctl.c SG_IO was
already testing against max_sectors and SCSI-ml was setting max_sectors and
max_hw_sectors to the same value this does not change any scsi SG_IO behavior. It only
prepares ll_rw_blk.c, scsi_ioctl.c and bio.c for when SCSI-ml begins to set
a valid max_hw_sectors for all LLDs. Today if a LLD does not set it
SCSI-ml sets it to a safe default and some LLDs set it to a artificial low
value to overcome memory and feedback issues.

Note: Since we now cap max_sectors to BLK_DEF_MAX_SECTORS, which is 1024,
drivers that used to call blk_queue_max_sectors with a large value of
max_sectors will now see the fs requests capped to BLK_DEF_MAX_SECTORS.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] add retries field to request for REQ_BLOCK_PC use

2005-12-15T03:04:11+00:00

For tape we need to control the retries. This patch adds a retries
counter on the request for REQ_BLOCK_PC commands originating from
scsi_execute* to use. REQ_BLOCK_PC commands comming from the block
layer SG_IO path continue to use the retires set in the ULD init_command.
(scsi_execute* does not set the gendisk so we do not execute
the init_command in that path).

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley

[SCSI] export blk layer functions needed for blk_execute_rq_nowait

2005-12-15T03:00:50+00:00

To send async requests we need these two functions exported.

Signed-off-by: Mike Christie 
Signed-off-by: James Bottomley