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ncr5380: Disable the DMA errata workaround flag by default

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The only chip that needs the workarounds enabled is an early NMOS
device. That means that the common case is to disable them.

Unfortunately the sense of the flag is such that it has to be set
for the common case.

Rename the flag so that zero can be used to mean "no errata workarounds
needed". This simplifies the code.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Finn Thain 2016-03-23 21:10:14 +11:00 committed by Martin K. Petersen
parent e63449c43a
commit 1bb4600245
8 changed files with 14 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/scsi/NCR5380.c
View File

@ -457,7 +457,7 @@ static void prepare_info(struct Scsi_Host *instance)
instance->base, instance->irq,
instance->can_queue, instance->cmd_per_lun,
instance->sg_tablesize, instance->this_id,
hostdata->flags & FLAG_NO_DMA_FIXUP ? "NO_DMA_FIXUP " : "",
hostdata->flags & FLAG_DMA_FIXUP ? "DMA_FIXUP " : "",
hostdata->flags & FLAG_NO_PSEUDO_DMA ? "NO_PSEUDO_DMA " : "",
hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "",
#ifdef AUTOPROBE_IRQ
@ -1480,11 +1480,11 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
* before the setting of DMA mode to after transfer of the last byte.
*/
if (hostdata->flags & FLAG_NO_DMA_FIXUP)
if (hostdata->flags & FLAG_DMA_FIXUP)
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
else
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
MR_ENABLE_EOP_INTR);
else
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG));
@ -1540,8 +1540,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
if (p & SR_IO) {
foo = NCR5380_pread(instance, d,
hostdata->flags & FLAG_NO_DMA_FIXUP ? c : c - 1);
if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
hostdata->flags & FLAG_DMA_FIXUP ? c - 1 : c);
if (!foo && (hostdata->flags & FLAG_DMA_FIXUP)) {
/*
* The workaround was to transfer fewer bytes than we
* intended to with the pseudo-DMA read function, wait for
@ -1571,7 +1571,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
}
} else {
foo = NCR5380_pwrite(instance, d, c);
if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
if (!foo && (hostdata->flags & FLAG_DMA_FIXUP)) {
/*
* Wait for the last byte to be sent. If REQ is being asserted for
* the byte we're interested, we'll ACK it and it will go false.

2
drivers/scsi/NCR5380.h
View File

@ -220,7 +220,7 @@
#define NO_IRQ 0
#endif
#define FLAG_NO_DMA_FIXUP 1 /* No DMA errata workarounds */
#define FLAG_DMA_FIXUP 1 /* Use DMA errata workarounds */
#define FLAG_NO_PSEUDO_DMA 8 /* Inhibit DMA */
#define FLAG_LATE_DMA_SETUP 32 /* Setup NCR before DMA H/W */
#define FLAG_TAGGED_QUEUING 64 /* as X3T9.2 spelled it */

2
drivers/scsi/arm/cumana_1.c
View File

@ -239,7 +239,7 @@ static int cumanascsi1_probe(struct expansion_card *ec,
host->irq = ec->irq;
ret = NCR5380_init(host, 0);
ret = NCR5380_init(host, FLAG_DMA_FIXUP);
if (ret)
goto out_unmap;

2
drivers/scsi/arm/oak.c
View File

@ -143,7 +143,7 @@ static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
host->irq = NO_IRQ;
host->n_io_port = 255;
ret = NCR5380_init(host, 0);
ret = NCR5380_init(host, FLAG_DMA_FIXUP);
if (ret)
goto out_unmap;

2
drivers/scsi/dtc.c
View File

@ -229,7 +229,7 @@ found:
instance->base = addr;
((struct NCR5380_hostdata *)(instance)->hostdata)->base = base;
if (NCR5380_init(instance, FLAG_NO_DMA_FIXUP))
if (NCR5380_init(instance, 0))
goto out_unregister;
NCR5380_maybe_reset_bus(instance);

8
drivers/scsi/g_NCR5380.c
View File

@ -348,23 +348,17 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
flags = 0;
switch (overrides[current_override].board) {
case BOARD_NCR5380:
flags = FLAG_NO_PSEUDO_DMA;
break;
case BOARD_NCR53C400:
flags = FLAG_NO_DMA_FIXUP;
flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
break;
case BOARD_NCR53C400A:
flags = FLAG_NO_DMA_FIXUP;
ports = ncr_53c400a_ports;
magic = ncr_53c400a_magic;
break;
case BOARD_HP_C2502:
flags = FLAG_NO_DMA_FIXUP;
ports = ncr_53c400a_ports;
magic = hp_c2502_magic;
break;
case BOARD_DTC3181E:
flags = FLAG_NO_DMA_FIXUP;
ports = dtc_3181e_ports;
magic = ncr_53c400a_magic;
break;

2
drivers/scsi/pas16.c
View File

@ -377,7 +377,7 @@ static int __init pas16_detect(struct scsi_host_template *tpnt)
instance->io_port = io_port;
if (NCR5380_init(instance, 0))
if (NCR5380_init(instance, FLAG_DMA_FIXUP))
goto out_unregister;
NCR5380_maybe_reset_bus(instance);

2
drivers/scsi/t128.c
View File

@ -210,7 +210,7 @@ found:
instance->base = base;
((struct NCR5380_hostdata *)instance->hostdata)->base = p;
if (NCR5380_init(instance, 0))
if (NCR5380_init(instance, FLAG_DMA_FIXUP))
goto out_unregister;
NCR5380_maybe_reset_bus(instance);