-static void idetape_init_pc(struct ide_atapi_pc *pc)
-{
- memset(pc->c, 0, 12);
- pc->retries = 0;
- pc->flags = 0;
- pc->req_xfer = 0;
- pc->buf = pc->pc_buf;
- pc->buf_size = IDETAPE_PC_BUFFER_SIZE;
- pc->bh = NULL;
- pc->b_data = NULL;
-}
-
-static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
-{
- idetape_init_pc(pc);
- pc->c[0] = REQUEST_SENSE;
- pc->c[4] = 20;
- pc->req_xfer = 20;
-}
-
-/*
- * Generate a new packet command request in front of the request queue, before
- * the current request, so that it will be processed immediately, on the next
- * pass through the driver. The function below is called from the request
- * handling part of the driver (the "bottom" part). Safe storage for the request
- * should be allocated with ide_tape_next_{pc,rq}_storage() prior to that.
- *
- * Memory for those requests is pre-allocated at initialization time, and is
- * limited to IDETAPE_PC_STACK requests. We assume that we have enough space for
- * the maximum possible number of inter-dependent packet commands.
- *
- * The higher level of the driver - The ioctl handler and the character device
- * handling functions should queue request to the lower level part and wait for
- * their completion using idetape_queue_pc_tail or idetape_queue_rw_tail.
- */
-static void idetape_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
- struct request *rq)
-{
- struct ide_tape_obj *tape = drive->driver_data;
-
- blk_rq_init(NULL, rq);
- rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->cmd_flags |= REQ_PREEMPT;
- rq->buffer = (char *) pc;
- rq->rq_disk = tape->disk;
- memcpy(rq->cmd, pc->c, 12);
- rq->cmd[13] = REQ_IDETAPE_PC1;
- ide_do_drive_cmd(drive, rq);
-}
-
-/*
- * idetape_retry_pc is called when an error was detected during the
- * last packet command. We queue a request sense packet command in
- * the head of the request list.
- */
-static void idetape_retry_pc(ide_drive_t *drive)
-{
- struct ide_atapi_pc *pc;
- struct request *rq;
-
- (void)ide_read_error(drive);
- pc = idetape_next_pc_storage(drive);
- rq = idetape_next_rq_storage(drive);
- idetape_create_request_sense_cmd(pc);
- set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- idetape_queue_pc_head(drive, pc, rq);
-}
-