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ncr5380: Cleanup TAG_NEXT and TAG_NONE macros

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Both atari_NCR5380.c and sun3_NCR5380.c core drivers #undef TAG_NONE and
then redefine it. But the original definition is unused because NCR5380.c
lacks support for tagged queueing. So just define it once.

The TAG_NEXT macro only appears in the arguments to NCR5380_select() calls.
But that routine doesn't use its tag argument as the tag was already
assigned in NCR5380_main(). So remove the unused argument and the macro.

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 16:11:53 +11:00 committed by Christoph Hellwig
parent 4d3d2a54f7
commit 76f13b9321
4 changed files with 27 additions and 51 deletions
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29
drivers/scsi/NCR5380.c
View File

@ -1073,14 +1073,14 @@ static void NCR5380_main(struct work_struct *work)
hostdata->selecting = NULL;
/* RvC: have to preset this to indicate a new command is being performed */
if (!NCR5380_select(instance, tmp,
/*
* REQUEST SENSE commands are issued without tagged
* queueing, even on SCSI-II devices because the
* contingent allegiance condition exists for the
* entire unit.
*/
(tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE : TAG_NEXT)) {
/*
* REQUEST SENSE commands are issued without tagged
* queueing, even on SCSI-II devices because the
* contingent allegiance condition exists for the
* entire unit.
*/
if (!NCR5380_select(instance, tmp)) {
break;
} else {
LIST(tmp, hostdata->issue_queue);
@ -1097,7 +1097,7 @@ static void NCR5380_main(struct work_struct *work)
if (hostdata->selecting) {
tmp = (Scsi_Cmnd *) hostdata->selecting;
/* Selection will drop and retake the lock */
if (!NCR5380_select(instance, tmp, (tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE : TAG_NEXT)) {
if (!NCR5380_select(instance, tmp)) {
/* Ok ?? */
} else {
/* RvC: device failed, so we wait a long time
@ -1246,17 +1246,14 @@ static void collect_stats(struct NCR5380_hostdata *hostdata, Scsi_Cmnd * cmd)
/*
* Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd,
* int tag);
* Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd)
*
* Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command,
* including ARBITRATION, SELECTION, and initial message out for
* IDENTIFY and queue messages.
*
* Inputs : instance - instantiation of the 5380 driver on which this
* target lives, cmd - SCSI command to execute, tag - set to TAG_NEXT for
* new tag, TAG_NONE for untagged queueing, otherwise set to the tag for
* the command that is presently connected.
* target lives, cmd - SCSI command to execute.
*
* Returns : -1 if selection could not execute for some reason,
* 0 if selection succeeded or failed because the target
@ -1278,7 +1275,7 @@ static void collect_stats(struct NCR5380_hostdata *hostdata, Scsi_Cmnd * cmd)
* Locks: caller holds hostdata lock in IRQ mode
*/
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd)
{
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
@ -2773,7 +2770,7 @@ static int NCR5380_abort(Scsi_Cmnd * cmd) {
if (cmd == tmp) {
dprintk(NDEBUG_ABORT, "scsi%d : aborting disconnected command.\n", instance->host_no);
if (NCR5380_select(instance, cmd, (int) cmd->tag))
if (NCR5380_select(instance, cmd))
return FAILED;
dprintk(NDEBUG_ABORT, "scsi%d : nexus reestablished.\n", instance->host_no);

11
drivers/scsi/NCR5380.h
View File

@ -224,14 +224,11 @@
#define DISCONNECT_LONG 2
/*
* These are "special" values for the tag parameter passed to NCR5380_select.
* "Special" value for the (unsigned char) command tag, to indicate
* I_T_L nexus instead of I_T_L_Q.
*/
#define TAG_NEXT -1 /* Use next free tag */
#define TAG_NONE -2 /*
* Establish I_T_L nexus instead of I_T_L_Q
* even on SCSI-II devices.
*/
#define TAG_NONE 0xff
/*
* These are "special" values for the irq and dma_channel fields of the
@ -323,7 +320,7 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id);
static void NCR5380_main(struct work_struct *work);
static void __maybe_unused NCR5380_print_options(struct Scsi_Host *instance);
static void NCR5380_reselect(struct Scsi_Host *instance);
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag);
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd);
#if defined(PSEUDO_DMA) || defined(REAL_DMA) || defined(REAL_DMA_POLL)
static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data);
#endif

19
drivers/scsi/atari_NCR5380.c
View File

@ -316,10 +316,6 @@ static struct scsi_host_template *the_template = NULL;
* important: the tag bit must be cleared before 'nr_allocated' is decreased.
*/
/* -1 for TAG_NONE is not possible with unsigned char cmd->tag */
#undef TAG_NONE
#define TAG_NONE 0xff
typedef struct {
DECLARE_BITMAP(allocated, MAX_TAGS);
int nr_allocated;
@ -1118,9 +1114,7 @@ static void NCR5380_main(struct work_struct *work)
#ifdef SUPPORT_TAGS
cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE);
#endif
if (!NCR5380_select(instance, tmp,
(tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE :
TAG_NEXT)) {
if (!NCR5380_select(instance, tmp)) {
falcon_dont_release--;
/* release if target did not response! */
falcon_release_lock_if_possible(hostdata);
@ -1351,17 +1345,14 @@ static void collect_stats(struct NCR5380_hostdata* hostdata, Scsi_Cmnd *cmd)
#endif
/*
* Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd,
* int tag);
* Function : int NCR5380_select (struct Scsi_Host *instance, Scsi_Cmnd *cmd)
*
* Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command,
* including ARBITRATION, SELECTION, and initial message out for
* IDENTIFY and queue messages.
*
* Inputs : instance - instantiation of the 5380 driver on which this
* target lives, cmd - SCSI command to execute, tag - set to TAG_NEXT for
* new tag, TAG_NONE for untagged queueing, otherwise set to the tag for
* the command that is presently connected.
* target lives, cmd - SCSI command to execute.
*
* Returns : -1 if selection could not execute for some reason,
* 0 if selection succeeded or failed because the target
@ -1381,7 +1372,7 @@ static void collect_stats(struct NCR5380_hostdata* hostdata, Scsi_Cmnd *cmd)
* cmd->result host byte set to DID_BAD_TARGET.
*/
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag)
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd)
{
SETUP_HOSTDATA(instance);
unsigned char tmp[3], phase;
@ -2757,7 +2748,7 @@ int NCR5380_abort(Scsi_Cmnd *cmd)
local_irq_restore(flags);
dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO);
if (NCR5380_select(instance, cmd, (int)cmd->tag))
if (NCR5380_select(instance, cmd))
return FAILED;
dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO);

19
drivers/scsi/sun3_NCR5380.c
View File

@ -305,10 +305,6 @@ static struct scsi_host_template *the_template = NULL;
* important: the tag bit must be cleared before 'nr_allocated' is decreased.
*/
/* -1 for TAG_NONE is not possible with unsigned char cmd->tag */
#undef TAG_NONE
#define TAG_NONE 0xff
/* For the m68k, the number of bits in 'allocated' must be a multiple of 32! */
#if (MAX_TAGS % 32) != 0
#error "MAX_TAGS must be a multiple of 32!"
@ -1057,9 +1053,7 @@ static void NCR5380_main (struct work_struct *bl)
#ifdef SUPPORT_TAGS
cmd_get_tag( tmp, tmp->cmnd[0] != REQUEST_SENSE );
#endif
if (!NCR5380_select(instance, tmp,
(tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE :
TAG_NEXT)) {
if (!NCR5380_select(instance, tmp)) {
break;
} else {
local_irq_disable();
@ -1292,16 +1286,14 @@ static void collect_stats(struct NCR5380_hostdata *hostdata,
/*
* Function : int NCR5380_select(struct Scsi_Host *instance,
* struct scsi_cmnd *cmd, int tag);
* struct scsi_cmnd *cmd)
*
* Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command,
* including ARBITRATION, SELECTION, and initial message out for
* IDENTIFY and queue messages.
*
* Inputs : instance - instantiation of the 5380 driver on which this
* target lives, cmd - SCSI command to execute, tag - set to TAG_NEXT for
* new tag, TAG_NONE for untagged queueing, otherwise set to the tag for
* the command that is presently connected.
* target lives, cmd - SCSI command to execute.
*
* Returns : -1 if selection could not execute for some reason,
* 0 if selection succeeded or failed because the target
@ -1321,8 +1313,7 @@ static void collect_stats(struct NCR5380_hostdata *hostdata,
* cmd->result host byte set to DID_BAD_TARGET.
*/
static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd,
int tag)
static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
{
SETUP_HOSTDATA(instance);
unsigned char tmp[3], phase;
@ -2735,7 +2726,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
local_irq_restore(flags);
dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO);
if (NCR5380_select (instance, cmd, (int) cmd->tag))
if (NCR5380_select(instance, cmd))
return FAILED;
dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO);