mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Boaz Harrosh](/assets/img/avatar_default.png)
- Use new scsi_eh_prep/restor_cmnd() for synchronous REQUEST_SENSE invocation. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
437 lines
14 KiB
C
437 lines
14 KiB
C
/*
|
|
* NCR 5380 defines
|
|
*
|
|
* Copyright 1993, Drew Eckhardt
|
|
* Visionary Computing
|
|
* (Unix consulting and custom programming)
|
|
* drew@colorado.edu
|
|
* +1 (303) 666-5836
|
|
*
|
|
* DISTRIBUTION RELEASE 7
|
|
*
|
|
* For more information, please consult
|
|
*
|
|
* NCR 5380 Family
|
|
* SCSI Protocol Controller
|
|
* Databook
|
|
* NCR Microelectronics
|
|
* 1635 Aeroplaza Drive
|
|
* Colorado Springs, CO 80916
|
|
* 1+ (719) 578-3400
|
|
* 1+ (800) 334-5454
|
|
*/
|
|
|
|
/*
|
|
* $Log: NCR5380.h,v $
|
|
*/
|
|
|
|
#ifndef NCR5380_H
|
|
#define NCR5380_H
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#ifdef AUTOSENSE
|
|
#include <scsi/scsi_eh.h>
|
|
#endif
|
|
|
|
#define NCR5380_PUBLIC_RELEASE 7
|
|
#define NCR53C400_PUBLIC_RELEASE 2
|
|
|
|
#define NDEBUG_ARBITRATION 0x1
|
|
#define NDEBUG_AUTOSENSE 0x2
|
|
#define NDEBUG_DMA 0x4
|
|
#define NDEBUG_HANDSHAKE 0x8
|
|
#define NDEBUG_INFORMATION 0x10
|
|
#define NDEBUG_INIT 0x20
|
|
#define NDEBUG_INTR 0x40
|
|
#define NDEBUG_LINKED 0x80
|
|
#define NDEBUG_MAIN 0x100
|
|
#define NDEBUG_NO_DATAOUT 0x200
|
|
#define NDEBUG_NO_WRITE 0x400
|
|
#define NDEBUG_PIO 0x800
|
|
#define NDEBUG_PSEUDO_DMA 0x1000
|
|
#define NDEBUG_QUEUES 0x2000
|
|
#define NDEBUG_RESELECTION 0x4000
|
|
#define NDEBUG_SELECTION 0x8000
|
|
#define NDEBUG_USLEEP 0x10000
|
|
#define NDEBUG_LAST_BYTE_SENT 0x20000
|
|
#define NDEBUG_RESTART_SELECT 0x40000
|
|
#define NDEBUG_EXTENDED 0x80000
|
|
#define NDEBUG_C400_PREAD 0x100000
|
|
#define NDEBUG_C400_PWRITE 0x200000
|
|
#define NDEBUG_LISTS 0x400000
|
|
|
|
#define NDEBUG_ANY 0xFFFFFFFFUL
|
|
|
|
/*
|
|
* The contents of the OUTPUT DATA register are asserted on the bus when
|
|
* either arbitration is occurring or the phase-indicating signals (
|
|
* IO, CD, MSG) in the TARGET COMMAND register and the ASSERT DATA
|
|
* bit in the INITIATOR COMMAND register is set.
|
|
*/
|
|
|
|
#define OUTPUT_DATA_REG 0 /* wo DATA lines on SCSI bus */
|
|
#define CURRENT_SCSI_DATA_REG 0 /* ro same */
|
|
|
|
#define INITIATOR_COMMAND_REG 1 /* rw */
|
|
#define ICR_ASSERT_RST 0x80 /* rw Set to assert RST */
|
|
#define ICR_ARBITRATION_PROGRESS 0x40 /* ro Indicates arbitration complete */
|
|
#define ICR_TRI_STATE 0x40 /* wo Set to tri-state drivers */
|
|
#define ICR_ARBITRATION_LOST 0x20 /* ro Indicates arbitration lost */
|
|
#define ICR_DIFF_ENABLE 0x20 /* wo Set to enable diff. drivers */
|
|
#define ICR_ASSERT_ACK 0x10 /* rw ini Set to assert ACK */
|
|
#define ICR_ASSERT_BSY 0x08 /* rw Set to assert BSY */
|
|
#define ICR_ASSERT_SEL 0x04 /* rw Set to assert SEL */
|
|
#define ICR_ASSERT_ATN 0x02 /* rw Set to assert ATN */
|
|
#define ICR_ASSERT_DATA 0x01 /* rw SCSI_DATA_REG is asserted */
|
|
|
|
#ifdef DIFFERENTIAL
|
|
#define ICR_BASE ICR_DIFF_ENABLE
|
|
#else
|
|
#define ICR_BASE 0
|
|
#endif
|
|
|
|
#define MODE_REG 2
|
|
/*
|
|
* Note : BLOCK_DMA code will keep DRQ asserted for the duration of the
|
|
* transfer, causing the chip to hog the bus. You probably don't want
|
|
* this.
|
|
*/
|
|
#define MR_BLOCK_DMA_MODE 0x80 /* rw block mode DMA */
|
|
#define MR_TARGET 0x40 /* rw target mode */
|
|
#define MR_ENABLE_PAR_CHECK 0x20 /* rw enable parity checking */
|
|
#define MR_ENABLE_PAR_INTR 0x10 /* rw enable bad parity interrupt */
|
|
#define MR_ENABLE_EOP_INTR 0x08 /* rw enable eop interrupt */
|
|
#define MR_MONITOR_BSY 0x04 /* rw enable int on unexpected bsy fail */
|
|
#define MR_DMA_MODE 0x02 /* rw DMA / pseudo DMA mode */
|
|
#define MR_ARBITRATE 0x01 /* rw start arbitration */
|
|
|
|
#ifdef PARITY
|
|
#define MR_BASE MR_ENABLE_PAR_CHECK
|
|
#else
|
|
#define MR_BASE 0
|
|
#endif
|
|
|
|
#define TARGET_COMMAND_REG 3
|
|
#define TCR_LAST_BYTE_SENT 0x80 /* ro DMA done */
|
|
#define TCR_ASSERT_REQ 0x08 /* tgt rw assert REQ */
|
|
#define TCR_ASSERT_MSG 0x04 /* tgt rw assert MSG */
|
|
#define TCR_ASSERT_CD 0x02 /* tgt rw assert CD */
|
|
#define TCR_ASSERT_IO 0x01 /* tgt rw assert IO */
|
|
|
|
#define STATUS_REG 4 /* ro */
|
|
/*
|
|
* Note : a set bit indicates an active signal, driven by us or another
|
|
* device.
|
|
*/
|
|
#define SR_RST 0x80
|
|
#define SR_BSY 0x40
|
|
#define SR_REQ 0x20
|
|
#define SR_MSG 0x10
|
|
#define SR_CD 0x08
|
|
#define SR_IO 0x04
|
|
#define SR_SEL 0x02
|
|
#define SR_DBP 0x01
|
|
|
|
/*
|
|
* Setting a bit in this register will cause an interrupt to be generated when
|
|
* BSY is false and SEL true and this bit is asserted on the bus.
|
|
*/
|
|
#define SELECT_ENABLE_REG 4 /* wo */
|
|
|
|
#define BUS_AND_STATUS_REG 5 /* ro */
|
|
#define BASR_END_DMA_TRANSFER 0x80 /* ro set on end of transfer */
|
|
#define BASR_DRQ 0x40 /* ro mirror of DRQ pin */
|
|
#define BASR_PARITY_ERROR 0x20 /* ro parity error detected */
|
|
#define BASR_IRQ 0x10 /* ro mirror of IRQ pin */
|
|
#define BASR_PHASE_MATCH 0x08 /* ro Set when MSG CD IO match TCR */
|
|
#define BASR_BUSY_ERROR 0x04 /* ro Unexpected change to inactive state */
|
|
#define BASR_ATN 0x02 /* ro BUS status */
|
|
#define BASR_ACK 0x01 /* ro BUS status */
|
|
|
|
/* Write any value to this register to start a DMA send */
|
|
#define START_DMA_SEND_REG 5 /* wo */
|
|
|
|
/*
|
|
* Used in DMA transfer mode, data is latched from the SCSI bus on
|
|
* the falling edge of REQ (ini) or ACK (tgt)
|
|
*/
|
|
#define INPUT_DATA_REG 6 /* ro */
|
|
|
|
/* Write any value to this register to start a DMA receive */
|
|
#define START_DMA_TARGET_RECEIVE_REG 6 /* wo */
|
|
|
|
/* Read this register to clear interrupt conditions */
|
|
#define RESET_PARITY_INTERRUPT_REG 7 /* ro */
|
|
|
|
/* Write any value to this register to start an ini mode DMA receive */
|
|
#define START_DMA_INITIATOR_RECEIVE_REG 7 /* wo */
|
|
|
|
#define C400_CONTROL_STATUS_REG NCR53C400_register_offset-8 /* rw */
|
|
|
|
#define CSR_RESET 0x80 /* wo Resets 53c400 */
|
|
#define CSR_53C80_REG 0x80 /* ro 5380 registers busy */
|
|
#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
|
|
#define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */
|
|
#define CSR_53C80_INTR 0x10 /* rw Enable 53c80 interrupts */
|
|
#define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */
|
|
#define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Is Host buffer ready */
|
|
#define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer read */
|
|
#define CSR_GATED_53C80_IRQ 0x01 /* ro Last block xferred */
|
|
|
|
#if 0
|
|
#define CSR_BASE CSR_SCSI_BUFF_INTR | CSR_53C80_INTR
|
|
#else
|
|
#define CSR_BASE CSR_53C80_INTR
|
|
#endif
|
|
|
|
/* Number of 128-byte blocks to be transferred */
|
|
#define C400_BLOCK_COUNTER_REG NCR53C400_register_offset-7 /* rw */
|
|
|
|
/* Resume transfer after disconnect */
|
|
#define C400_RESUME_TRANSFER_REG NCR53C400_register_offset-6 /* wo */
|
|
|
|
/* Access to host buffer stack */
|
|
#define C400_HOST_BUFFER NCR53C400_register_offset-4 /* rw */
|
|
|
|
|
|
/* Note : PHASE_* macros are based on the values of the STATUS register */
|
|
#define PHASE_MASK (SR_MSG | SR_CD | SR_IO)
|
|
|
|
#define PHASE_DATAOUT 0
|
|
#define PHASE_DATAIN SR_IO
|
|
#define PHASE_CMDOUT SR_CD
|
|
#define PHASE_STATIN (SR_CD | SR_IO)
|
|
#define PHASE_MSGOUT (SR_MSG | SR_CD)
|
|
#define PHASE_MSGIN (SR_MSG | SR_CD | SR_IO)
|
|
#define PHASE_UNKNOWN 0xff
|
|
|
|
/*
|
|
* Convert status register phase to something we can use to set phase in
|
|
* the target register so we can get phase mismatch interrupts on DMA
|
|
* transfers.
|
|
*/
|
|
|
|
#define PHASE_SR_TO_TCR(phase) ((phase) >> 2)
|
|
|
|
/*
|
|
* The internal should_disconnect() function returns these based on the
|
|
* expected length of a disconnect if a device supports disconnect/
|
|
* reconnect.
|
|
*/
|
|
|
|
#define DISCONNECT_NONE 0
|
|
#define DISCONNECT_TIME_TO_DATA 1
|
|
#define DISCONNECT_LONG 2
|
|
|
|
/*
|
|
* These are "special" values for the tag parameter passed to NCR5380_select.
|
|
*/
|
|
|
|
#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.
|
|
*/
|
|
|
|
/*
|
|
* These are "special" values for the irq and dma_channel fields of the
|
|
* Scsi_Host structure
|
|
*/
|
|
|
|
#define SCSI_IRQ_NONE 255
|
|
#define DMA_NONE 255
|
|
#define IRQ_AUTO 254
|
|
#define DMA_AUTO 254
|
|
#define PORT_AUTO 0xffff /* autoprobe io port for 53c400a */
|
|
|
|
#define FLAG_HAS_LAST_BYTE_SENT 1 /* NCR53c81 or better */
|
|
#define FLAG_CHECK_LAST_BYTE_SENT 2 /* Only test once */
|
|
#define FLAG_NCR53C400 4 /* NCR53c400 */
|
|
#define FLAG_NO_PSEUDO_DMA 8 /* Inhibit DMA */
|
|
#define FLAG_DTC3181E 16 /* DTC3181E */
|
|
|
|
#ifndef ASM
|
|
struct NCR5380_hostdata {
|
|
NCR5380_implementation_fields; /* implementation specific */
|
|
struct Scsi_Host *host; /* Host backpointer */
|
|
unsigned char id_mask, id_higher_mask; /* 1 << id, all bits greater */
|
|
unsigned char targets_present; /* targets we have connected
|
|
to, so we can call a select
|
|
failure a retryable condition */
|
|
volatile unsigned char busy[8]; /* index = target, bit = lun */
|
|
#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
|
|
volatile int dma_len; /* requested length of DMA */
|
|
#endif
|
|
volatile unsigned char last_message; /* last message OUT */
|
|
volatile Scsi_Cmnd *connected; /* currently connected command */
|
|
volatile Scsi_Cmnd *issue_queue; /* waiting to be issued */
|
|
volatile Scsi_Cmnd *disconnected_queue; /* waiting for reconnect */
|
|
volatile int restart_select; /* we have disconnected,
|
|
used to restart
|
|
NCR5380_select() */
|
|
volatile unsigned aborted:1; /* flag, says aborted */
|
|
int flags;
|
|
unsigned long time_expires; /* in jiffies, set prior to sleeping */
|
|
int select_time; /* timer in select for target response */
|
|
volatile Scsi_Cmnd *selecting;
|
|
struct delayed_work coroutine; /* our co-routine */
|
|
#ifdef NCR5380_STATS
|
|
unsigned timebase; /* Base for time calcs */
|
|
long time_read[8]; /* time to do reads */
|
|
long time_write[8]; /* time to do writes */
|
|
unsigned long bytes_read[8]; /* bytes read */
|
|
unsigned long bytes_write[8]; /* bytes written */
|
|
unsigned pendingr;
|
|
unsigned pendingw;
|
|
#endif
|
|
#ifdef AUTOSENSE
|
|
struct scsi_eh_save ses;
|
|
#endif
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#define dprintk(a,b) do {} while(0)
|
|
#define NCR5380_dprint(a,b) do {} while(0)
|
|
#define NCR5380_dprint_phase(a,b) do {} while(0)
|
|
|
|
#if defined(AUTOPROBE_IRQ)
|
|
static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible);
|
|
#endif
|
|
static int NCR5380_init(struct Scsi_Host *instance, int flags);
|
|
static void NCR5380_exit(struct Scsi_Host *instance);
|
|
static void NCR5380_information_transfer(struct Scsi_Host *instance);
|
|
#ifndef DONT_USE_INTR
|
|
static irqreturn_t NCR5380_intr(int irq, void *dev_id);
|
|
#endif
|
|
static void NCR5380_main(struct work_struct *work);
|
|
static void __maybe_unused NCR5380_print_options(struct Scsi_Host *instance);
|
|
#ifdef NDEBUG
|
|
static void NCR5380_print_phase(struct Scsi_Host *instance);
|
|
static void NCR5380_print(struct Scsi_Host *instance);
|
|
#endif
|
|
static int NCR5380_abort(Scsi_Cmnd * cmd);
|
|
static int NCR5380_bus_reset(Scsi_Cmnd * cmd);
|
|
static int NCR5380_queue_command(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *));
|
|
static int __maybe_unused NCR5380_proc_info(struct Scsi_Host *instance,
|
|
char *buffer, char **start, off_t offset, int length, int inout);
|
|
|
|
static void NCR5380_reselect(struct Scsi_Host *instance);
|
|
static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag);
|
|
#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
|
|
static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data);
|
|
|
|
#if (defined(REAL_DMA) || defined(REAL_DMA_POLL))
|
|
|
|
#if defined(i386) || defined(__alpha__)
|
|
|
|
/**
|
|
* NCR5380_pc_dma_setup - setup ISA DMA
|
|
* @instance: adapter to set up
|
|
* @ptr: block to transfer (virtual address)
|
|
* @count: number of bytes to transfer
|
|
* @mode: DMA controller mode to use
|
|
*
|
|
* Program the DMA controller ready to perform an ISA DMA transfer
|
|
* on this chip.
|
|
*
|
|
* Locks: takes and releases the ISA DMA lock.
|
|
*/
|
|
|
|
static __inline__ int NCR5380_pc_dma_setup(struct Scsi_Host *instance, unsigned char *ptr, unsigned int count, unsigned char mode)
|
|
{
|
|
unsigned limit;
|
|
unsigned long bus_addr = virt_to_bus(ptr);
|
|
unsigned long flags;
|
|
|
|
if (instance->dma_channel <= 3) {
|
|
if (count > 65536)
|
|
count = 65536;
|
|
limit = 65536 - (bus_addr & 0xFFFF);
|
|
} else {
|
|
if (count > 65536 * 2)
|
|
count = 65536 * 2;
|
|
limit = 65536 * 2 - (bus_addr & 0x1FFFF);
|
|
}
|
|
|
|
if (count > limit)
|
|
count = limit;
|
|
|
|
if ((count & 1) || (bus_addr & 1))
|
|
panic("scsi%d : attempted unaligned DMA transfer\n", instance->host_no);
|
|
|
|
flags=claim_dma_lock();
|
|
disable_dma(instance->dma_channel);
|
|
clear_dma_ff(instance->dma_channel);
|
|
set_dma_addr(instance->dma_channel, bus_addr);
|
|
set_dma_count(instance->dma_channel, count);
|
|
set_dma_mode(instance->dma_channel, mode);
|
|
enable_dma(instance->dma_channel);
|
|
release_dma_lock(flags);
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* NCR5380_pc_dma_write_setup - setup ISA DMA write
|
|
* @instance: adapter to set up
|
|
* @ptr: block to transfer (virtual address)
|
|
* @count: number of bytes to transfer
|
|
*
|
|
* Program the DMA controller ready to perform an ISA DMA write to the
|
|
* SCSI controller.
|
|
*
|
|
* Locks: called routines take and release the ISA DMA lock.
|
|
*/
|
|
|
|
static __inline__ int NCR5380_pc_dma_write_setup(struct Scsi_Host *instance, unsigned char *src, unsigned int count)
|
|
{
|
|
return NCR5380_pc_dma_setup(instance, src, count, DMA_MODE_WRITE);
|
|
}
|
|
|
|
/**
|
|
* NCR5380_pc_dma_read_setup - setup ISA DMA read
|
|
* @instance: adapter to set up
|
|
* @ptr: block to transfer (virtual address)
|
|
* @count: number of bytes to transfer
|
|
*
|
|
* Program the DMA controller ready to perform an ISA DMA read from the
|
|
* SCSI controller.
|
|
*
|
|
* Locks: called routines take and release the ISA DMA lock.
|
|
*/
|
|
|
|
static __inline__ int NCR5380_pc_dma_read_setup(struct Scsi_Host *instance, unsigned char *src, unsigned int count)
|
|
{
|
|
return NCR5380_pc_dma_setup(instance, src, count, DMA_MODE_READ);
|
|
}
|
|
|
|
/**
|
|
* NCR5380_pc_dma_residual - return bytes left
|
|
* @instance: adapter
|
|
*
|
|
* Reports the number of bytes left over after the DMA was terminated.
|
|
*
|
|
* Locks: takes and releases the ISA DMA lock.
|
|
*/
|
|
|
|
static __inline__ int NCR5380_pc_dma_residual(struct Scsi_Host *instance)
|
|
{
|
|
unsigned long flags;
|
|
int tmp;
|
|
|
|
flags = claim_dma_lock();
|
|
clear_dma_ff(instance->dma_channel);
|
|
tmp = get_dma_residue(instance->dma_channel);
|
|
release_dma_lock(flags);
|
|
|
|
return tmp;
|
|
}
|
|
#endif /* defined(i386) || defined(__alpha__) */
|
|
#endif /* defined(REAL_DMA) */
|
|
#endif /* __KERNEL__ */
|
|
#endif /* ndef ASM */
|
|
#endif /* NCR5380_H */
|