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atari_NCR5380: Introduce FLAG_TAGGED_QUEUING

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The static variable setup_use_tagged_queuing is declared in mac_scsi.c,
sun3_scsi.c and atari_scsi.c and doesn't belong in the core driver.
None of the other NCR5380 drivers suffer from this layering issue which
makes merging the core drivers more difficult and will likely hinder plans
for future use of platform data to configure the driver.

Replace the static variable with a host flag. This way it can be reported
along with the other flags.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Finn Thain 2014-11-12 16:12:19 +11:00 committed by Christoph Hellwig
parent ff50f9ed0f
commit ca513fc948
5 changed files with 28 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/scsi/NCR5380.h
View File

@ -242,6 +242,7 @@
#define FLAG_NO_PSEUDO_DMA 8 /* Inhibit DMA */
#define FLAG_DTC3181E 16 /* DTC3181E */
#define FLAG_LATE_DMA_SETUP 32 /* Setup NCR before DMA H/W */
#define FLAG_TAGGED_QUEUING 64 /* as X3T9.2 spelled it */
#ifndef ASM
struct NCR5380_hostdata {

22
drivers/scsi/atari_NCR5380.c
View File

@ -283,12 +283,12 @@ typedef struct {
static TAG_ALLOC TagAlloc[8][8]; /* 8 targets and 8 LUNs */
static void __init init_tags(void)
static void __init init_tags(struct NCR5380_hostdata *hostdata)
{
int target, lun;
TAG_ALLOC *ta;
if (!setup_use_tagged_queuing)
if (!(hostdata->flags & FLAG_TAGGED_QUEUING))
return;
for (target = 0; target < 8; ++target) {
@ -321,7 +321,8 @@ static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged)
if (hostdata->busy[cmd->device->id] & (1 << lun))
return 1;
if (!should_be_tagged ||
!setup_use_tagged_queuing || !cmd->device->tagged_supported)
!(hostdata->flags & FLAG_TAGGED_QUEUING) ||
!cmd->device->tagged_supported)
return 0;
if (TagAlloc[cmd->device->id][lun].nr_allocated >=
TagAlloc[cmd->device->id][lun].queue_size) {
@ -347,7 +348,8 @@ static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged)
* an untagged command.
*/
if (!should_be_tagged ||
!setup_use_tagged_queuing || !cmd->device->tagged_supported) {
!(hostdata->flags & FLAG_TAGGED_QUEUING) ||
!cmd->device->tagged_supported) {
cmd->tag = TAG_NONE;
hostdata->busy[cmd->device->id] |= (1 << lun);
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d now allocated by untagged "
@ -392,12 +394,12 @@ static void cmd_free_tag(struct scsi_cmnd *cmd)
}
static void free_all_tags(void)
static void free_all_tags(struct NCR5380_hostdata *hostdata)
{
int target, lun;
TAG_ALLOC *ta;
if (!setup_use_tagged_queuing)
if (!(hostdata->flags & FLAG_TAGGED_QUEUING))
return;
for (target = 0; target < 8; ++target) {
@ -653,11 +655,13 @@ static void prepare_info(struct Scsi_Host *instance)
"base 0x%lx, irq %d, "
"can_queue %d, cmd_per_lun %d, "
"sg_tablesize %d, this_id %d, "
"flags { %s}, "
"options { %s} ",
instance->hostt->name, instance->io_port, instance->n_io_port,
instance->base, instance->irq,
instance->can_queue, instance->cmd_per_lun,
instance->sg_tablesize, instance->this_id,
hostdata->flags & FLAG_TAGGED_QUEUING ? "TAGGED_QUEUING " : "",
#ifdef DIFFERENTIAL
"DIFFERENTIAL "
#endif
@ -799,7 +803,7 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
for (i = 0; i < 8; ++i)
hostdata->busy[i] = 0;
#ifdef SUPPORT_TAGS
init_tags();
init_tags(hostdata);
#endif
#if defined (REAL_DMA)
hostdata->dma_len = 0;
@ -2565,7 +2569,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
* SIMPLE_QUEUE_TAG for the I_T_L_Q nexus.
*/
tag = TAG_NONE;
if (phase == PHASE_MSGIN && setup_use_tagged_queuing) {
if (phase == PHASE_MSGIN && (hostdata->flags & FLAG_TAGGED_QUEUING)) {
/* Accept previous IDENTIFY message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
len = 2;
@ -3020,7 +3024,7 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
hostdata->connected = NULL;
hostdata->disconnected_queue = NULL;
#ifdef SUPPORT_TAGS
free_all_tags();
free_all_tags(hostdata);
#endif
for (i = 0; i < 8; ++i)
hostdata->busy[i] = 0;

8
drivers/scsi/atari_scsi.c
View File

@ -890,10 +890,6 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
}
}
#ifdef SUPPORT_TAGS
if (setup_use_tagged_queuing < 0)
setup_use_tagged_queuing = 0;
#endif
#ifdef REAL_DMA
/* If running on a Falcon and if there's TT-Ram (i.e., more than one
@ -929,6 +925,10 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
host_flags |= IS_A_TT() ? 0 : FLAG_LATE_DMA_SETUP;
#ifdef SUPPORT_TAGS
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
NCR5380_init(instance, host_flags);
if (IS_A_TT()) {

8
drivers/scsi/mac_scsi.c
View File

@ -411,10 +411,6 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
mac_scsi_template.sg_tablesize = setup_sg_tablesize;
if (setup_hostid >= 0)
mac_scsi_template.this_id = setup_hostid & 7;
#ifdef SUPPORT_TAGS
if (setup_use_tagged_queuing < 0)
setup_use_tagged_queuing = 0;
#endif
if (setup_use_pdma < 0)
setup_use_pdma = 0;
@ -440,6 +436,10 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
mac_scsi_reset_boot(instance);
#endif
#ifdef SUPPORT_TAGS
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
NCR5380_init(instance, host_flags);
if (instance->irq != NO_IRQ) {

12
drivers/scsi/sun3_scsi.c
View File

@ -522,6 +522,7 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
int error;
struct resource *irq, *mem;
unsigned char *ioaddr;
int host_flags = 0;
#ifdef SUN3_SCSI_VME
int i;
#endif
@ -535,11 +536,6 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
if (setup_hostid >= 0)
sun3_scsi_template.this_id = setup_hostid & 7;
#ifdef SUPPORT_TAGS
if (setup_use_tagged_queuing < 0)
setup_use_tagged_queuing = 1;
#endif
#ifdef SUN3_SCSI_VME
ioaddr = NULL;
for (i = 0; i < 2; i++) {
@ -601,7 +597,11 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
instance->io_port = (unsigned long)ioaddr;
instance->irq = irq->start;
NCR5380_init(instance, 0);
#ifdef SUPPORT_TAGS
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
NCR5380_init(instance, host_flags);
error = request_irq(instance->irq, scsi_sun3_intr, 0,
"NCR5380", instance);