Commit f825e40b authored by Finn Thain's avatar Finn Thain Committed by Martin K. Petersen
Browse files

ncr5380: Remove PSEUDO_DMA macro 



For those wrapper drivers which only implement Programmed IO, have
NCR5380_dma_xfer_len() evaluate to zero. That allows PDMA to be easily
disabled at run-time and so the PSEUDO_DMA macro is no longer needed.

Also remove the spin counters used for debugging pseudo DMA drivers.

Signed-off-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Tested-by: default avatarMichael Schmitz <schmitzmic@gmail.com>
Tested-by: default avatarOndrej Zary <linux@rainbow-software.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 1bb46002

drivers/scsi/NCR5380.c

+1 −31
Original line number Diff line number Diff line
@@ -468,35 +468,10 @@ static void prepare_info(struct Scsi_Host *instance) 
#endif

#ifdef PARITY

	         "PARITY "

#endif

#ifdef PSEUDO_DMA

	         "PSEUDO_DMA "

#endif

	         "");

}



#ifdef PSEUDO_DMA

static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance,

	char *buffer, int length)

{

	struct NCR5380_hostdata *hostdata = shost_priv(instance);



	hostdata->spin_max_r = 0;

	hostdata->spin_max_w = 0;

	return 0;

}



static int __maybe_unused NCR5380_show_info(struct seq_file *m,

                                            struct Scsi_Host *instance)

{

	struct NCR5380_hostdata *hostdata = shost_priv(instance);



	seq_printf(m, "Highwater I/O busy spin counts: write %d, read %d\n",

	        hostdata->spin_max_w, hostdata->spin_max_r);

	return 0;

}

#endif



/**

 * NCR5380_init - initialise an NCR5380

 * @instance: adapter to configure
@@ -1436,7 +1411,6 @@ timeout: 
	return -1;

}



#if defined(PSEUDO_DMA)

/*

 * Function : int NCR5380_transfer_dma (struct Scsi_Host *instance,

 * unsigned char *phase, int *count, unsigned char **data)
@@ -1592,7 +1566,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, 
	*phase = NCR5380_read(STATUS_REG) & PHASE_MASK;

	return foo;

}

#endif /* PSEUDO_DMA */



/*

 * Function : NCR5380_information_transfer (struct Scsi_Host *instance)
@@ -1683,7 +1656,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) 
				 * in an unconditional loop.

				 */



#if defined(PSEUDO_DMA)

				transfersize = 0;

				if (!cmd->device->borken)

					transfersize = NCR5380_dma_xfer_len(instance, cmd, phase);
@@ -1706,9 +1678,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) 
						/* XXX - need to source or sink data here, as appropriate */

					} else

						cmd->SCp.this_residual -= transfersize - len;

				} else

#endif /* PSEUDO_DMA */

				{

				} else {

					/* Break up transfer into 3 ms chunks,

					 * presuming 6 accesses per handshake.

					 */

drivers/scsi/NCR5380.h

+0 −4
Original line number Diff line number Diff line
@@ -256,10 +256,6 @@ struct NCR5380_hostdata { 
	struct work_struct main_task;

#ifdef SUPPORT_TAGS

	struct tag_alloc TagAlloc[8][8];	/* 8 targets and 8 LUNs */

#endif

#ifdef PSEUDO_DMA

	unsigned spin_max_r;

	unsigned spin_max_w;

#endif

	struct workqueue_struct *work_q;

	unsigned long accesses_per_ms;	/* chip register accesses per ms */

drivers/scsi/arm/cumana_1.c

+0 −2
Original line number Diff line number Diff line
@@ -13,8 +13,6 @@ 


#include <scsi/scsi_host.h>



#define PSEUDO_DMA



#define priv(host)			((struct NCR5380_hostdata *)(host)->hostdata)

#define NCR5380_read(reg)		cumanascsi_read(instance, reg)

#define NCR5380_write(reg, value)	cumanascsi_write(instance, reg, value)

drivers/scsi/arm/oak.c

+1 −2
Original line number Diff line number Diff line
@@ -14,7 +14,6 @@ 


#include <scsi/scsi_host.h>



/*#define PSEUDO_DMA*/

#define DONT_USE_INTR



#define priv(host)			((struct NCR5380_hostdata *)(host)->hostdata)
@@ -24,7 +23,7 @@ 
#define NCR5380_write(reg, value) \

	writeb(value, priv(instance)->base + ((reg) << 2))



#define NCR5380_dma_xfer_len(instance, cmd, phase)	(cmd->transfersize)

#define NCR5380_dma_xfer_len(instance, cmd, phase)	(0)



#define NCR5380_queue_command		oakscsi_queue_command

#define NCR5380_info			oakscsi_info

drivers/scsi/dmx3191d.c

+4 −0
Original line number Diff line number Diff line
@@ -39,6 +39,10 @@ 
#define NCR5380_read(reg)		inb(instance->io_port + reg)

#define NCR5380_write(reg, value)	outb(value, instance->io_port + reg)



#define NCR5380_dma_xfer_len(instance, cmd, phase)	(0)

#define NCR5380_pread(instance, dst, len)		(0)

#define NCR5380_pwrite(instance, src, len)		(0)



#define NCR5380_implementation_fields	/* none */



#include "NCR5380.h"

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