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linux-2.6/drivers/scsi/pcmcia/nsp_cs.h
Jeff Garzik f281233d3e SCSI host lock push-down 
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>
2010-11-16 13:33:23 -08:00

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/*=======================================================/
Header file for nsp_cs.c
By: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
Ver.1.0 : Cut unused lines.
Ver 0.1 : Initial version.
This software may be used and distributed according to the terms of
the GNU General Public License.
=========================================================*/
#ifndef __nsp_cs__
#define __nsp_cs__
/* for debugging */
//#define NSP_DEBUG 9
/*
#define static
#define inline
*/
/************************************
* Some useful macros...
*/
/* SCSI initiator must be ID 7 */
#define NSP_INITIATOR_ID 7
#define NSP_SELTIMEOUT 200
/***************************************************************************
* register definitions
***************************************************************************/
/*========================================================================
* base register
========================================================================*/
#define IRQCONTROL 0x00 /* R */
# define IRQCONTROL_RESELECT_CLEAR BIT(0)
# define IRQCONTROL_PHASE_CHANGE_CLEAR BIT(1)
# define IRQCONTROL_TIMER_CLEAR BIT(2)
# define IRQCONTROL_FIFO_CLEAR BIT(3)
# define IRQCONTROL_ALLMASK 0xff
# define IRQCONTROL_ALLCLEAR (IRQCONTROL_RESELECT_CLEAR | \
IRQCONTROL_PHASE_CHANGE_CLEAR | \
IRQCONTROL_TIMER_CLEAR | \
IRQCONTROL_FIFO_CLEAR )
# define IRQCONTROL_IRQDISABLE 0xf0
#define IRQSTATUS 0x00 /* W */
# define IRQSTATUS_SCSI BIT(0)
# define IRQSTATUS_TIMER BIT(2)
# define IRQSTATUS_FIFO BIT(3)
# define IRQSTATUS_MASK 0x0f
#define IFSELECT 0x01 /* W */
# define IF_IFSEL BIT(0)
# define IF_REGSEL BIT(2)
#define FIFOSTATUS 0x01 /* R */
# define FIFOSTATUS_CHIP_REVISION_MASK 0x0f
# define FIFOSTATUS_CHIP_ID_MASK 0x70
# define FIFOSTATUS_FULL_EMPTY BIT(7)
#define INDEXREG 0x02 /* R/W */
#define DATAREG 0x03 /* R/W */
#define FIFODATA 0x04 /* R/W */
#define FIFODATA1 0x05 /* R/W */
#define FIFODATA2 0x06 /* R/W */
#define FIFODATA3 0x07 /* R/W */
/*====================================================================
* indexed register
====================================================================*/
#define EXTBUSCTRL 0x10 /* R/W,deleted */
#define CLOCKDIV 0x11 /* R/W */
# define CLOCK_40M 0x02
# define CLOCK_20M 0x01
# define FAST_20 BIT(2)
#define TERMPWRCTRL 0x13 /* R/W */
# define POWER_ON BIT(0)
#define SCSIIRQMODE 0x15 /* R/W */
# define SCSI_PHASE_CHANGE_EI BIT(0)
# define RESELECT_EI BIT(4)
# define FIFO_IRQ_EI BIT(5)
# define SCSI_RESET_IRQ_EI BIT(6)
#define IRQPHASESENCE 0x16 /* R */
# define LATCHED_MSG BIT(0)
# define LATCHED_IO BIT(1)
# define LATCHED_CD BIT(2)
# define LATCHED_BUS_FREE BIT(3)
# define PHASE_CHANGE_IRQ BIT(4)
# define RESELECT_IRQ BIT(5)
# define FIFO_IRQ BIT(6)
# define SCSI_RESET_IRQ BIT(7)
#define TIMERCOUNT 0x17 /* R/W */
#define SCSIBUSCTRL 0x18 /* R/W */
# define SCSI_SEL BIT(0)
# define SCSI_RST BIT(1)
# define SCSI_DATAOUT_ENB BIT(2)
# define SCSI_ATN BIT(3)
# define SCSI_ACK BIT(4)
# define SCSI_BSY BIT(5)
# define AUTODIRECTION BIT(6)
# define ACKENB BIT(7)
#define SCSIBUSMON 0x19 /* R */
#define SETARBIT 0x1A /* W */
# define ARBIT_GO BIT(0)
# define ARBIT_FLAG_CLEAR BIT(1)
#define ARBITSTATUS 0x1A /* R */
/*# define ARBIT_GO BIT(0)*/
# define ARBIT_WIN BIT(1)
# define ARBIT_FAIL BIT(2)
# define RESELECT_FLAG BIT(3)
#define PARITYCTRL 0x1B /* W */
#define PARITYSTATUS 0x1B /* R */
#define COMMANDCTRL 0x1C /* W */
# define CLEAR_COMMAND_POINTER BIT(0)
# define AUTO_COMMAND_GO BIT(1)
#define RESELECTID 0x1C /* R */
#define COMMANDDATA 0x1D /* R/W */
#define POINTERCLR 0x1E /* W */
# define POINTER_CLEAR BIT(0)
# define ACK_COUNTER_CLEAR BIT(1)
# define REQ_COUNTER_CLEAR BIT(2)
# define HOST_COUNTER_CLEAR BIT(3)
# define READ_SOURCE (BIT(4) | BIT(5))
# define ACK_COUNTER (0)
# define REQ_COUNTER (BIT(4))
# define HOST_COUNTER (BIT(5))
#define TRANSFERCOUNT 0x1E /* R */
#define TRANSFERMODE 0x20 /* R/W */
# define MODE_MEM8 BIT(0)
# define MODE_MEM32 BIT(1)
# define MODE_ADR24 BIT(2)
# define MODE_ADR32 BIT(3)
# define MODE_IO8 BIT(4)
# define MODE_IO32 BIT(5)
# define TRANSFER_GO BIT(6)
# define BRAIND BIT(7)
#define SYNCREG 0x21 /* R/W */
# define SYNCREG_OFFSET_MASK 0x0f
# define SYNCREG_PERIOD_MASK 0xf0
# define SYNCREG_PERIOD_SHIFT 4
#define SCSIDATALATCH 0x22 /* W */
#define SCSIDATAIN 0x22 /* R */
#define SCSIDATAWITHACK 0x23 /* R/W */
#define SCAMCONTROL 0x24 /* W */
#define SCAMSTATUS 0x24 /* R */
#define SCAMDATA 0x25 /* R/W */
#define OTHERCONTROL 0x26 /* R/W */
# define TPL_ROM_WRITE_EN BIT(0)
# define TPWR_OUT BIT(1)
# define TPWR_SENSE BIT(2)
# define RA8_CONTROL BIT(3)
#define ACKWIDTH 0x27 /* R/W */
#define CLRTESTPNT 0x28 /* W */
#define ACKCNTLD 0x29 /* W */
#define REQCNTLD 0x2A /* W */
#define HSTCNTLD 0x2B /* W */
#define CHECKSUM 0x2C /* R/W */
/************************************************************************
* Input status bit definitions.
************************************************************************/
#define S_MESSAGE BIT(0) /* Message line from SCSI bus */
#define S_IO BIT(1) /* Input/Output line from SCSI bus */
#define S_CD BIT(2) /* Command/Data line from SCSI bus */
#define S_BUSY BIT(3) /* Busy line from SCSI bus */
#define S_ACK BIT(4) /* Acknowledge line from SCSI bus */
#define S_REQUEST BIT(5) /* Request line from SCSI bus */
#define S_SELECT BIT(6) /* */
#define S_ATN BIT(7) /* */
/***********************************************************************
* Useful Bus Monitor status combinations.
***********************************************************************/
#define BUSMON_SEL S_SELECT
#define BUSMON_BSY S_BUSY
#define BUSMON_REQ S_REQUEST
#define BUSMON_IO S_IO
#define BUSMON_ACK S_ACK
#define BUSMON_BUS_FREE 0
#define BUSMON_COMMAND ( S_BUSY | S_CD | S_REQUEST )
#define BUSMON_MESSAGE_IN ( S_BUSY | S_CD | S_IO | S_MESSAGE | S_REQUEST )
#define BUSMON_MESSAGE_OUT ( S_BUSY | S_CD | S_MESSAGE | S_REQUEST )
#define BUSMON_DATA_IN ( S_BUSY | S_IO | S_REQUEST )
#define BUSMON_DATA_OUT ( S_BUSY | S_REQUEST )
#define BUSMON_STATUS ( S_BUSY | S_CD | S_IO | S_REQUEST )
#define BUSMON_SELECT ( S_IO | S_SELECT )
#define BUSMON_RESELECT ( S_IO | S_SELECT )
#define BUSMON_PHASE_MASK ( S_CD | S_IO | S_MESSAGE | S_SELECT )
#define BUSPHASE_SELECT ( BUSMON_SELECT & BUSMON_PHASE_MASK )
#define BUSPHASE_COMMAND ( BUSMON_COMMAND & BUSMON_PHASE_MASK )
#define BUSPHASE_MESSAGE_IN ( BUSMON_MESSAGE_IN & BUSMON_PHASE_MASK )
#define BUSPHASE_MESSAGE_OUT ( BUSMON_MESSAGE_OUT & BUSMON_PHASE_MASK )
#define BUSPHASE_DATA_IN ( BUSMON_DATA_IN & BUSMON_PHASE_MASK )
#define BUSPHASE_DATA_OUT ( BUSMON_DATA_OUT & BUSMON_PHASE_MASK )
#define BUSPHASE_STATUS ( BUSMON_STATUS & BUSMON_PHASE_MASK )
/*====================================================================*/
typedef struct scsi_info_t {
struct pcmcia_device *p_dev;
struct Scsi_Host *host;
int stop;
} scsi_info_t;
/* synchronous transfer negotiation data */
typedef struct _sync_data {
unsigned int SyncNegotiation;
#define SYNC_NOT_YET 0
#define SYNC_OK 1
#define SYNC_NG 2
unsigned int SyncPeriod;
unsigned int SyncOffset;
unsigned char SyncRegister;
unsigned char AckWidth;
} sync_data;
typedef struct _nsp_hw_data {
unsigned int BaseAddress;
unsigned int NumAddress;
unsigned int IrqNumber;
unsigned long MmioAddress;
#define NSP_MMIO_OFFSET 0x0800
unsigned long MmioLength;
unsigned char ScsiClockDiv;
unsigned char TransferMode;
int TimerCount;
int SelectionTimeOut;
struct scsi_cmnd *CurrentSC;
//int CurrnetTarget;
int FifoCount;
#define MSGBUF_SIZE 20
unsigned char MsgBuffer[MSGBUF_SIZE];
int MsgLen;
#define N_TARGET 8
sync_data Sync[N_TARGET];
char nspinfo[110]; /* description */
spinlock_t Lock;
scsi_info_t *ScsiInfo; /* attach <-> detect glue */
#ifdef NSP_DEBUG
int CmdId; /* Accepted command serial number.
Used for debugging. */
#endif
} nsp_hw_data;
/****************************************************************************
*
*/
/* Card service functions */
static void nsp_cs_detach (struct pcmcia_device *p_dev);
static void nsp_cs_release(struct pcmcia_device *link);
static int nsp_cs_config (struct pcmcia_device *link);
/* Linux SCSI subsystem specific functions */
static struct Scsi_Host *nsp_detect (struct scsi_host_template *sht);
static const char *nsp_info (struct Scsi_Host *shpnt);
static int nsp_proc_info (
struct Scsi_Host *host,
char *buffer,
char **start,
off_t offset,
int length,
int inout);
static int nsp_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *SCpnt);
/* Error handler */
/*static int nsp_eh_abort (struct scsi_cmnd *SCpnt);*/
/*static int nsp_eh_device_reset(struct scsi_cmnd *SCpnt);*/
static int nsp_eh_bus_reset (struct scsi_cmnd *SCpnt);
static int nsp_eh_host_reset (struct scsi_cmnd *SCpnt);
static int nsp_bus_reset (nsp_hw_data *data);
/* */
static int nsphw_init (nsp_hw_data *data);
static int nsphw_start_selection(struct scsi_cmnd *SCpnt);
static void nsp_start_timer (struct scsi_cmnd *SCpnt, int time);
static int nsp_fifo_count (struct scsi_cmnd *SCpnt);
static void nsp_pio_read (struct scsi_cmnd *SCpnt);
static void nsp_pio_write (struct scsi_cmnd *SCpnt);
static int nsp_nexus (struct scsi_cmnd *SCpnt);
static void nsp_scsi_done (struct scsi_cmnd *SCpnt);
static int nsp_analyze_sdtr (struct scsi_cmnd *SCpnt);
static int nsp_negate_signal (struct scsi_cmnd *SCpnt,
unsigned char mask, char *str);
static int nsp_expect_signal (struct scsi_cmnd *SCpnt,
unsigned char current_phase,
unsigned char mask);
static int nsp_xfer (struct scsi_cmnd *SCpnt, int phase);
static int nsp_dataphase_bypass (struct scsi_cmnd *SCpnt);
static int nsp_reselected (struct scsi_cmnd *SCpnt);
static struct Scsi_Host *nsp_detect(struct scsi_host_template *sht);
/* Interrupt handler */
//static irqreturn_t nspintr(int irq, void *dev_id);
/* Module entry point*/
static int __init nsp_cs_init(void);
static void __exit nsp_cs_exit(void);
/* Debug */
#ifdef NSP_DEBUG
static void show_command (struct scsi_cmnd *SCpnt);
static void show_phase (struct scsi_cmnd *SCpnt);
static void show_busphase(unsigned char stat);
static void show_message (nsp_hw_data *data);
#else
# define show_command(ptr) /* */
# define show_phase(SCpnt) /* */
# define show_busphase(stat) /* */
# define show_message(data) /* */
#endif
/*
* SCSI phase
*/
enum _scsi_phase {
PH_UNDETERMINED ,
PH_ARBSTART ,
PH_SELSTART ,
PH_SELECTED ,
PH_COMMAND ,
PH_DATA ,
PH_STATUS ,
PH_MSG_IN ,
PH_MSG_OUT ,
PH_DISCONNECT ,
PH_RESELECT ,
PH_ABORT ,
PH_RESET
};
enum _data_in_out {
IO_UNKNOWN,
IO_IN,
IO_OUT
};
enum _burst_mode {
BURST_IO8 = 0,
BURST_IO32 = 1,
BURST_MEM32 = 2,
};
/**************************************************************************
* SCSI messaage
*/
#define MSG_COMMAND_COMPLETE 0x00
#define MSG_EXTENDED 0x01
#define MSG_ABORT 0x06
#define MSG_NO_OPERATION 0x08
#define MSG_BUS_DEVICE_RESET 0x0c
#define MSG_EXT_SDTR 0x01
/* scatter-gather table */
# define BUFFER_ADDR ((char *)((sg_virt(SCpnt->SCp.buffer))))
#endif /*__nsp_cs__*/
/* end */
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