f281233d3e
Move the mid-layer's ->queuecommand() invocation from being locked with the host lock to being unlocked to facilitate speeding up the critical path for drivers who don't need this lock taken anyway. The patch below presents a simple SCSI host lock push-down as an equivalent transformation. No locking or other behavior should change with this patch. All existing bugs and locking orders are preserved. Additionally, add one parameter to queuecommand, struct Scsi_Host * and remove one parameter from queuecommand, void (*done)(struct scsi_cmnd *) Scsi_Host* is a convenient pointer that most host drivers need anyway, and 'done' is redundant to struct scsi_cmnd->scsi_done. Minimal code disturbance was attempted with this change. Most drivers needed only two one-line modifications for their host lock push-down. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*
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* Generic Generic NCR5380 driver defines
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*
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* Copyright 1993, Drew Eckhardt
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* Visionary Computing
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* (Unix and Linux consulting and custom programming)
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* drew@colorado.edu
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* +1 (303) 440-4894
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*
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* NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
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* K.Lentin@cs.monash.edu.au
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*
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* ALPHA RELEASE 1.
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*
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* For more information, please consult
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*
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* NCR 5380 Family
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* SCSI Protocol Controller
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* Databook
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*
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* NCR Microelectronics
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* 1635 Aeroplaza Drive
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* Colorado Springs, CO 80916
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* 1+ (719) 578-3400
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* 1+ (800) 334-5454
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*/
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/*
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* $Log: generic_NCR5380.h,v $
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*/
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#ifndef GENERIC_NCR5380_H
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#define GENERIC_NCR5380_H
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#define GENERIC_NCR5380_PUBLIC_RELEASE 1
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#ifdef NCR53C400
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#define BIOSPARAM
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#define NCR5380_BIOSPARAM generic_NCR5380_biosparam
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#else
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#define NCR5380_BIOSPARAM NULL
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#endif
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#ifndef ASM
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static int generic_NCR5380_abort(Scsi_Cmnd *);
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static int generic_NCR5380_detect(struct scsi_host_template *);
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static int generic_NCR5380_release_resources(struct Scsi_Host *);
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static int generic_NCR5380_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
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static int generic_NCR5380_bus_reset(Scsi_Cmnd *);
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static const char* generic_NCR5380_info(struct Scsi_Host *);
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#ifndef CMD_PER_LUN
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#define CMD_PER_LUN 2
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#endif
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#ifndef CAN_QUEUE
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#define CAN_QUEUE 16
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#endif
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#ifndef HOSTS_C
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#define __STRVAL(x) #x
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#define STRVAL(x) __STRVAL(x)
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#ifndef SCSI_G_NCR5380_MEM
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#define NCR5380_map_config port
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#define NCR5380_map_type int
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#define NCR5380_map_name port
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#define NCR5380_instance_name io_port
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#define NCR53C400_register_offset 0
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#define NCR53C400_address_adjust 8
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#ifdef NCR53C400
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#define NCR5380_region_size 16
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#else
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#define NCR5380_region_size 8
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#endif
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#define NCR5380_read(reg) (inb(NCR5380_map_name + (reg)))
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#define NCR5380_write(reg, value) (outb((value), (NCR5380_map_name + (reg))))
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#define NCR5380_implementation_fields \
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NCR5380_map_type NCR5380_map_name
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#define NCR5380_local_declare() \
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register NCR5380_implementation_fields
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#define NCR5380_setup(instance) \
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NCR5380_map_name = (NCR5380_map_type)((instance)->NCR5380_instance_name)
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#else
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/* therefore SCSI_G_NCR5380_MEM */
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#define NCR5380_map_config memory
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#define NCR5380_map_type unsigned long
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#define NCR5380_map_name base
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#define NCR5380_instance_name base
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#define NCR53C400_register_offset 0x108
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#define NCR53C400_address_adjust 0
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#define NCR53C400_mem_base 0x3880
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#define NCR53C400_host_buffer 0x3900
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#define NCR5380_region_size 0x3a00
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#define NCR5380_read(reg) readb(iomem + NCR53C400_mem_base + (reg))
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#define NCR5380_write(reg, value) writeb(value, iomem + NCR53C400_mem_base + (reg))
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#define NCR5380_implementation_fields \
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NCR5380_map_type NCR5380_map_name; \
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void __iomem *iomem;
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#define NCR5380_local_declare() \
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register void __iomem *iomem
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#define NCR5380_setup(instance) \
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iomem = (((struct NCR5380_hostdata *)(instance)->hostdata)->iomem)
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#endif
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#define NCR5380_intr generic_NCR5380_intr
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#define NCR5380_queue_command generic_NCR5380_queue_command
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#define NCR5380_abort generic_NCR5380_abort
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#define NCR5380_bus_reset generic_NCR5380_bus_reset
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#define NCR5380_pread generic_NCR5380_pread
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#define NCR5380_pwrite generic_NCR5380_pwrite
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#define NCR5380_proc_info notyet_generic_proc_info
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#define BOARD_NCR5380 0
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#define BOARD_NCR53C400 1
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#define BOARD_NCR53C400A 2
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#define BOARD_DTC3181E 3
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#endif /* else def HOSTS_C */
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#endif /* ndef ASM */
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#endif /* GENERIC_NCR5380_H */
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