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bsg: support for full generic block layer SG v3

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Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2007-07-09 12:38:05 +02:00
parent 8f41958bdd
commit 3d6392cfbd
10 changed files with 1171 additions and 79 deletions
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29
drivers/ide/ide-floppy.c
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@@ -1258,19 +1258,25 @@ static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
}
static int
static void
idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
{
/*
* just support eject for now, it would not be hard to make the
* REQ_BLOCK_PC support fully-featured
*/
if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
return 1;
idefloppy_init_pc(pc);
pc->callback = &idefloppy_rw_callback;
memcpy(pc->c, rq->cmd, sizeof(pc->c));
return 0;
pc->rq = rq;
pc->b_count = rq->data_len;
if (rq->data_len && rq_data_dir(rq) == WRITE)
set_bit(PC_WRITING, &pc->flags);
pc->buffer = rq->data;
if (rq->bio)
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
/*
* possibly problematic, doesn't look like ide-floppy correctly
* handled scattered requests if dma fails...
*/
pc->request_transfer = pc->buffer_size = rq->data_len;
}
/*
@@ -1317,10 +1323,7 @@ static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request
pc = (idefloppy_pc_t *) rq->buffer;
} else if (blk_pc_request(rq)) {
pc = idefloppy_next_pc_storage(drive);
if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
idefloppy_do_end_request(drive, 0, 0);
return ide_stopped;
}
idefloppy_blockpc_cmd(floppy, pc, rq);
} else {
blk_dump_rq_flags(rq,
"ide-floppy: unsupported command in queue");