tape34xx.c

移植到2410开发板上的源代码

 * (blocksize is set via MTSETBLK.
 */
ccw_req_t *
tape34xx_mtbsr (tape_info_t * ti, int count)
{
	long lockflags;
	int i;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	if ((count == 0) || (count > 510)) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xbsr parm");
#endif /* TAPE_DEBUG */   
	        return NULL;
	}
	cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xbsr nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	for (i = 0; i < count; i++) {
		ccw->cmd_code = BACKSPACEBLOCK;
		ccw->flags = CCW_FLAG_CC;
		ccw->count = 0;
		ccw->cda = (unsigned long) (&(ccw->cmd_code));
		ccw++;
	}
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_BSB_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xbsr ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTWEOF: Write 'count' file marks at the current position.
 */
ccw_req_t *
tape34xx_mtweof (tape_info_t * ti, int count)
{
	long lockflags;
	int i;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	if ((count == 0) || (count > 510)) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xweo parm");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xweo nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	for (i = 0; i < count; i++) {
		ccw->cmd_code = WRITETAPEMARK;
		ccw->flags = CCW_FLAG_CC;
		ccw->count = 1;
		ccw->cda = (unsigned long) (&(ccw->cmd_code));
		ccw++;
	}
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_WTM_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xweo ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTREW: Rewind the tape.
 */
ccw_req_t *
tape34xx_mtrew (tape_info_t * ti, int count)
{
	long lockflags;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	cqr = tape_alloc_ccw_req (ti, 3, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xrew nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	ccw->cmd_code = REWIND;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_REW_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xrew ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTOFFL: Rewind the tape and put the drive off-line.
 * Implement 'rewind unload'
 */
ccw_req_t *
tape34xx_mtoffl (tape_info_t * ti, int count)
{
	long lockflags;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	cqr = tape_alloc_ccw_req (ti, 3, 32);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xoff nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	ccw->cmd_code = REWIND_UNLOAD;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = SENSE;
	ccw->flags = 0;
	ccw->count = 32;
	ccw->cda = (unsigned long) cqr->cpaddr;
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_RUN_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xoff ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTNOP: 'No operation'.
 */
ccw_req_t *
tape34xx_mtnop (tape_info_t * ti, int count)
{
	long lockflags;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	cqr = tape_alloc_ccw_req (ti, 1, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xnop nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) ccw->cmd_code;
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_NOP_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xnop ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTBSFM: Backward space over 'count' file marks.
 * The tape is positioned at the BOT (Begin Of Tape) side of the
 * last skipped file mark.
 */
ccw_req_t *
tape34xx_mtbsfm (tape_info_t * ti, int count)
{
	long lockflags;
	int i;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	if ((count == 0) || (count > 510)) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xbsm parm");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xbsm nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	for (i = 0; i < count; i++) {
		ccw->cmd_code = BACKSPACEFILE;
		ccw->flags = CCW_FLAG_CC;
		ccw->count = 0;
		ccw->cda = (unsigned long) (&(ccw->cmd_code));
		ccw++;
	}
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_BSF_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xbsm ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTFSFM: Forward space over 'count' file marks.
 * The tape is positioned at the BOT (Begin Of Tape) side
 * of the last skipped file mark.
 */
ccw_req_t *
tape34xx_mtfsfm (tape_info_t * ti, int count)
{
	long lockflags;
	int i;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	if ((count == 0) || (count > 510)) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xfsm parm");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	cqr = tape_alloc_ccw_req (ti, 2 + count, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xfsm nomem");
#endif /* TAPE_DEBUG */	    
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	for (i = 0; i < count; i++) {
		ccw->cmd_code = FORSPACEFILE;
		ccw->flags = CCW_FLAG_CC;
		ccw->count = 0;
		ccw->cda = (unsigned long) (&(ccw->cmd_code));
		ccw++;
	}
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_FSF_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xfsm ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTEOM: positions at the end of the portion of the tape already used
 * for recordind data. MTEOM positions after the last file mark, ready for
 * appending another file.
 * MTRETEN: Retension the tape, i.e. forward space to end of tape and rewind.
 */
ccw_req_t *
tape34xx_mteom (tape_info_t * ti, int count)
{
	long lockflags;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	cqr = tape_alloc_ccw_req (ti, 4, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xeom nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	ccw->cmd_code = FORSPACEFILE;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = NOP;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = CCW_CMD_TIC;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (cqr->cpaddr);
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_FSF_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xeom ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTERASE: erases the tape.
 */
ccw_req_t *
tape34xx_mterase (tape_info_t * ti, int count)
{
	long lockflags;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	cqr = tape_alloc_ccw_req (ti, 5, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xera nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	ccw->cmd_code = REWIND;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = ERASE_GAP;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = DATA_SEC_ERASE;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	ccw++;
	ccw->cmd_code = NOP;
	ccw->flags = 0;
	ccw->count = 0;
	ccw->cda = (unsigned long) (&(ccw->cmd_code));
	s390irq_spin_lock_irqsave (ti->devinfo.irq, lockflags);
	ti->kernbuf = NULL;
	ti->userbuf = NULL;
	tapestate_set (ti, TS_DSE_INIT);
	s390irq_spin_unlock_irqrestore (ti->devinfo.irq, lockflags);
#ifdef TAPE_DEBUG
	debug_text_event (tape_debug_area,6,"xera ccwg");
#endif /* TAPE_DEBUG */
	return cqr;
}

/*
 * MTSETDENSITY: set tape density.
 */
ccw_req_t *
tape34xx_mtsetdensity (tape_info_t * ti, int count)
{
	long lockflags;
	ccw_req_t *cqr;
	ccw1_t *ccw;
	cqr = tape_alloc_ccw_req (ti, 2, 0);
	if (!cqr) {
#ifdef TAPE_DEBUG
	        debug_text_exception (tape_debug_area,6,"xden nomem");
#endif /* TAPE_DEBUG */
		return NULL;
	}
	ccw = cqr->cpaddr;
	ccw->cmd_code = MODE_SET_DB;
	ccw->flags = CCW_FLAG_CC;
	ccw->count = 1;
	set_normalized_cda (ccw, (unsigned long) (&(((tape34xx_disc_data_t *) ti->discdata)->modeset_byte)));
	ccw++;
	ccw->cmd_code = NOP;