drivers/scsi/NCR5380.c

190  * @hostdata: host private data
207 static int NCR5380_poll_politely2(struct NCR5380_hostdata *hostdata,
212 	unsigned long n = hostdata->poll_loops;
296 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
345 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
370 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
372 	return hostdata->info;
391 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
398 	hostdata->host = instance;
399 	hostdata->id_mask = 1 << instance->this_id;
400 	hostdata->id_higher_mask = 0;
401 	for (i = hostdata->id_mask; i <= 0x80; i <<= 1)
402 		if (i > hostdata->id_mask)
403 			hostdata->id_higher_mask |= i;
405 		hostdata->busy[i] = 0;
406 	hostdata->dma_len = 0;
408 	spin_lock_init(&hostdata->lock);
409 	hostdata->connected = NULL;
410 	hostdata->sensing = NULL;
411 	INIT_LIST_HEAD(&hostdata->autosense);
412 	INIT_LIST_HEAD(&hostdata->unissued);
413 	INIT_LIST_HEAD(&hostdata->disconnected);
415 	hostdata->flags = flags;
417 	INIT_WORK(&hostdata->main_task, NCR5380_main);
418 	hostdata->work_q = alloc_workqueue("ncr5380_%d",
421 	if (!hostdata->work_q)
424 	snprintf(hostdata->info, sizeof(hostdata->info),
426 		instance->hostt->name, instance->irq, hostdata->io_port,
427 		hostdata->base, instance->can_queue, instance->cmd_per_lun,
429 		hostdata->flags & FLAG_DMA_FIXUP     ? "DMA_FIXUP "     : "",
430 		hostdata->flags & FLAG_NO_PSEUDO_DMA ? "NO_PSEUDO_DMA " : "",
431 		hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "");
451 	hostdata->poll_loops = NCR5380_REG_POLL_TIME * accesses_per_ms / 2;
472 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
481 			NCR5380_poll_politely(hostdata,
495 			if (hostdata->flags & FLAG_TOSHIBA_DELAY)
517 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
519 	cancel_work_sync(&hostdata->main_task);
520 	destroy_workqueue(hostdata->work_q);
532 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
536 	if (hostdata->sensing == cmd) {
539 			scsi_eh_restore_cmnd(cmd, &hostdata->ses);
541 			scsi_eh_restore_cmnd(cmd, &hostdata->ses);
544 		hostdata->sensing = NULL;
563 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
580 	spin_lock_irqsave(&hostdata->lock, flags);
583 		spin_unlock_irqrestore(&hostdata->lock, flags);
596 		list_add(&ncmd->list, &hostdata->unissued);
598 		list_add_tail(&ncmd->list, &hostdata->unissued);
600 	spin_unlock_irqrestore(&hostdata->lock, flags);
606 	queue_work(hostdata->work_q, &hostdata->main_task);
612 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
615 	if (list_empty(&hostdata->disconnected) &&
616 	    list_empty(&hostdata->unissued) &&
617 	    list_empty(&hostdata->autosense) &&
618 	    !hostdata->connected &&
619 	    !hostdata->selecting) {
637 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
641 	if (hostdata->sensing || list_empty(&hostdata->autosense)) {
642 		list_for_each_entry(ncmd, &hostdata->unissued, list) {
645 			         cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun);
647 			if (!(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))) {
656 		ncmd = list_first_entry(&hostdata->autosense,
662 		scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
663 		hostdata->sensing = cmd;
671 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
674 	if (hostdata->sensing == cmd) {
675 		scsi_eh_restore_cmnd(cmd, &hostdata->ses);
676 		list_add(&ncmd->list, &hostdata->autosense);
677 		hostdata->sensing = NULL;
679 		list_add(&ncmd->list, &hostdata->unissued);
693 	struct NCR5380_hostdata *hostdata =
695 	struct Scsi_Host *instance = hostdata->host;
701 		spin_lock_irq(&hostdata->lock);
702 		while (!hostdata->connected && !hostdata->selecting) {
712 			 * On success, instance->hostdata->connected is set.
731 		if (hostdata->connected && !hostdata->dma_len) {
736 		if (!hostdata->connected) {
737 			NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
740 		spin_unlock_irq(&hostdata->lock);
756 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
757 	struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(hostdata->connected);
764 	if (hostdata->read_overruns) {
779 	if (sun3scsi_dma_finish(hostdata->connected->sc_data_direction)) {
799 	transferred = hostdata->dma_len - NCR5380_dma_residual(hostdata);
800 	hostdata->dma_len = 0;
807 	if (hostdata->read_overruns) {
811 			cnt = toPIO = hostdata->read_overruns;
867 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
872 	spin_lock_irqsave(&hostdata->lock, flags);
890 			if (hostdata->connected) {
892 				queue_work(hostdata->work_q, &hostdata->main_task);
897 		} else if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) &&
905 			if (!hostdata->connected) {
907 				queue_work(hostdata->work_q, &hostdata->main_task);
909 			if (!hostdata->connected)
910 				NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
935 	spin_unlock_irqrestore(&hostdata->lock, flags);
958  * hostdata->connected will be set to cmd.
966 	__releases(&hostdata->lock) __acquires(&hostdata->lock)
968 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
989 	hostdata->selecting = cmd;
1002 	NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
1009 	spin_unlock_irq(&hostdata->lock);
1010 	err = NCR5380_poll_politely2(hostdata, MODE_REG, MR_ARBITRATE, 0,
1013 	spin_lock_irq(&hostdata->lock);
1018 	if (!hostdata->selecting) {
1029 	spin_unlock_irq(&hostdata->lock);
1036 	    (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) ||
1040 		spin_lock_irq(&hostdata->lock);
1056 	if (hostdata->flags & FLAG_TOSHIBA_DELAY)
1061 	spin_lock_irq(&hostdata->lock);
1067 	if (!hostdata->selecting) {
1080 	NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask | (1 << scmd_id(cmd)));
1098 	spin_unlock_irq(&hostdata->lock);
1136 	err = NCR5380_poll_politely(hostdata, STATUS_REG, SR_BSY, SR_BSY,
1140 		spin_lock_irq(&hostdata->lock);
1148 		spin_lock_irq(&hostdata->lock);
1152 		if (!hostdata->selecting)
1182 	err = NCR5380_poll_politely(hostdata, STATUS_REG, SR_REQ, SR_REQ, HZ);
1183 	spin_lock_irq(&hostdata->lock);
1189 	if (!hostdata->selecting) {
1213 	hostdata->connected = cmd;
1214 	hostdata->busy[cmd->device->id] |= 1 << cmd->device->lun;
1225 	if (!hostdata->selecting)
1227 	hostdata->selecting = NULL;
1261 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
1280 		if (NCR5380_poll_politely(hostdata, STATUS_REG, SR_REQ, SR_REQ,
1326 		if (NCR5380_poll_politely(hostdata,
1385 	struct NCR5380_hostdata __maybe_unused *hostdata = shost_priv(instance);
1409 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
1427 	rc = NCR5380_poll_politely(hostdata, STATUS_REG, SR_REQ, SR_REQ,
1439 		rc = NCR5380_poll_politely(hostdata, STATUS_REG, SR_REQ, 0,
1487 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
1499 	NCR5380_to_ncmd(hostdata->connected)->phase = p;
1502 		if (hostdata->read_overruns)
1503 			c -= hostdata->read_overruns;
1504 		else if (hostdata->flags & FLAG_DMA_FIXUP)
1520 	if (!(hostdata->flags & FLAG_LATE_DMA_SETUP)) {
1525 			result = NCR5380_dma_recv_setup(hostdata, d, c);
1527 			result = NCR5380_dma_send_setup(hostdata, d, c);
1554 	if (hostdata->flags & FLAG_LATE_DMA_SETUP) {
1559 			result = NCR5380_dma_recv_setup(hostdata, d, c);
1561 			result = NCR5380_dma_send_setup(hostdata, d, c);
1570 		hostdata->dma_len = result;
1575 	hostdata->dma_len = c;
1611 	if (hostdata->flags & FLAG_DMA_FIXUP) {
1628 			if (NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
1633 			if (NCR5380_poll_politely(hostdata, STATUS_REG,
1644 			if (NCR5380_poll_politely2(hostdata,
1675 	__releases(&hostdata->lock) __acquires(&hostdata->lock)
1677 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
1690 	while ((cmd = hostdata->connected)) {
1708 				count = sun3scsi_dma_xfer_len(hostdata, cmd);
1712 						sun3scsi_dma_send_setup(hostdata,
1715 						sun3scsi_dma_recv_setup(hostdata,
1746 				hostdata->connected = NULL;
1747 				hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
1774 					transfersize = NCR5380_dma_xfer_len(hostdata, cmd);
1826 					hostdata->connected = NULL;
1827 					hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
1841 							              &hostdata->autosense);
1856 					switch (hostdata->last_message) {
1861 						hostdata->busy[cmd->device->id] |= (1 << (cmd->device->lun & 0xFF));
1870 					hostdata->connected = NULL;
1871 					list_add(&ncmd->list, &hostdata->disconnected);
1910 					spin_unlock_irq(&hostdata->lock);
1948 					spin_lock_irq(&hostdata->lock);
1949 					if (!hostdata->connected)
1976 				hostdata->last_message = msgout;
1979 					hostdata->connected = NULL;
1980 					hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
2008 			spin_unlock_irq(&hostdata->lock);
2009 			NCR5380_poll_politely(hostdata, STATUS_REG, SR_REQ, SR_REQ, HZ);
2010 			spin_lock_irq(&hostdata->lock);
2027 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
2041 	target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask);
2058 	if (NCR5380_poll_politely(hostdata,
2070 	if (NCR5380_poll_politely(hostdata,
2122 	list_for_each_entry(ncmd, &hostdata->disconnected, list) {
2146 			hostdata->busy[target] &= ~(1 << lun);
2156 		count = sun3scsi_dma_xfer_len(hostdata, tmp);
2160 				sun3scsi_dma_send_setup(hostdata,
2163 				sun3scsi_dma_recv_setup(hostdata,
2175 	hostdata->connected = tmp;
2247 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
2251 	spin_lock_irqsave(&hostdata->lock, flags);
2259 	if (list_del_cmd(&hostdata->unissued, cmd)) {
2267 	if (hostdata->selecting == cmd) {
2270 		hostdata->selecting = NULL;
2276 	if (list_del_cmd(&hostdata->disconnected, cmd)) {
2288 	if (hostdata->connected == cmd) {
2290 		hostdata->connected = NULL;
2291 		hostdata->dma_len = 0;
2303 	if (list_del_cmd(&hostdata->autosense, cmd)) {
2313 		hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
2317 	queue_work(hostdata->work_q, &hostdata->main_task);
2318 	spin_unlock_irqrestore(&hostdata->lock, flags);
2326 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
2341 	if (hostdata->selecting) {
2342 		hostdata->selecting->result = DID_RESET << 16;
2343 		complete_cmd(instance, hostdata->selecting);
2344 		hostdata->selecting = NULL;
2347 	list_for_each_entry(ncmd, &hostdata->disconnected, list) {
2353 	INIT_LIST_HEAD(&hostdata->disconnected);
2355 	list_for_each_entry(ncmd, &hostdata->autosense, list) {
2360 	INIT_LIST_HEAD(&hostdata->autosense);
2362 	if (hostdata->connected) {
2363 		set_host_byte(hostdata->connected, DID_RESET);
2364 		complete_cmd(instance, hostdata->connected);
2365 		hostdata->connected = NULL;
2369 		hostdata->busy[i] = 0;
2370 	hostdata->dma_len = 0;
2372 	queue_work(hostdata->work_q, &hostdata->main_task);
2385 	struct NCR5380_hostdata *hostdata = shost_priv(instance);
2389 	spin_lock_irqsave(&hostdata->lock, flags);
2397 	list_for_each_entry(ncmd, &hostdata->unissued, list) {
2403 	INIT_LIST_HEAD(&hostdata->unissued);
2408 	spin_unlock_irqrestore(&hostdata->lock, flags);