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aic79xx_osm.h

/*
 * Adaptec AIC79xx device driver for Linux.
 *
 * Copyright (c) 2000-2001 Adaptec Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.h#166 $
 *
 */
#ifndef _AIC79XX_LINUX_H_
#define _AIC79XX_LINUX_H_

#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <asm/io.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>

/* Core SCSI definitions */
#define AIC_LIB_PREFIX ahd

/* Name space conflict with BSD queue macros */
#ifdef LIST_HEAD
#undef LIST_HEAD
#endif

#include "cam.h"
#include "queue.h"
#include "scsi_message.h"
#include "scsi_iu.h"
#include "aiclib.h"

/*********************************** Debugging ********************************/
#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
#ifdef CONFIG_AIC79XX_DEBUG_MASK
#define AHD_DEBUG 1
#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
#else
/*
 * Compile in debugging code, but do not enable any printfs.
 */
#define AHD_DEBUG 1
#define AHD_DEBUG_OPTS 0
#endif
/* No debugging code. */
#endif

/********************************** Misc Macros *******************************/
#define     powerof2(x) ((((x)-1)&(x))==0)

/************************* Forward Declarations *******************************/
struct ahd_softc;
typedef struct pci_dev *ahd_dev_softc_t;
typedef struct scsi_cmnd      *ahd_io_ctx_t;

/******************************* Byte Order ***********************************/
#define ahd_htobe16(x)  cpu_to_be16(x)
#define ahd_htobe32(x)  cpu_to_be32(x)
#define ahd_htobe64(x)  cpu_to_be64(x)
#define ahd_htole16(x)  cpu_to_le16(x)
#define ahd_htole32(x)  cpu_to_le32(x)
#define ahd_htole64(x)  cpu_to_le64(x)

#define ahd_be16toh(x)  be16_to_cpu(x)
#define ahd_be32toh(x)  be32_to_cpu(x)
#define ahd_be64toh(x)  be64_to_cpu(x)
#define ahd_le16toh(x)  le16_to_cpu(x)
#define ahd_le32toh(x)  le32_to_cpu(x)
#define ahd_le64toh(x)  le64_to_cpu(x)

/************************* Configuration Data *********************************/
extern uint32_t aic79xx_allow_memio;
extern struct scsi_host_template aic79xx_driver_template;

/***************************** Bus Space/DMA **********************************/

typedef uint32_t bus_size_t;

typedef enum {
      BUS_SPACE_MEMIO,
      BUS_SPACE_PIO
} bus_space_tag_t;

typedef union {
      u_long              ioport;
      volatile uint8_t __iomem *maddr;
} bus_space_handle_t;

typedef struct bus_dma_segment
{
      dma_addr_t  ds_addr;
      bus_size_t  ds_len;
} bus_dma_segment_t;

struct ahd_linux_dma_tag
{
      bus_size_t  alignment;
      bus_size_t  boundary;
      bus_size_t  maxsize;
};
typedef struct ahd_linux_dma_tag* bus_dma_tag_t;

typedef dma_addr_t bus_dmamap_t;

typedef int bus_dma_filter_t(void*, dma_addr_t);
typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);

#define BUS_DMA_WAITOK        0x0
#define BUS_DMA_NOWAIT        0x1
#define BUS_DMA_ALLOCNOW      0x2
#define BUS_DMA_LOAD_SEGS     0x4   /*
                               * Argument is an S/G list not
                               * a single buffer.
                               */

#define BUS_SPACE_MAXADDR     0xFFFFFFFF
#define BUS_SPACE_MAXADDR_32BIT     0xFFFFFFFF
#define BUS_SPACE_MAXSIZE_32BIT     0xFFFFFFFF

int   ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
                     bus_size_t /*alignment*/, bus_size_t /*boundary*/,
                     dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
                     bus_dma_filter_t*/*filter*/, void */*filterarg*/,
                     bus_size_t /*maxsize*/, int /*nsegments*/,
                     bus_size_t /*maxsegsz*/, int /*flags*/,
                     bus_dma_tag_t */*dma_tagp*/);

void  ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);

int   ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
                   void** /*vaddr*/, int /*flags*/,
                   bus_dmamap_t* /*mapp*/);

void  ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
                  void* /*vaddr*/, bus_dmamap_t /*map*/);

void  ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
                     bus_dmamap_t /*map*/);

int   ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
                  bus_dmamap_t /*map*/, void * /*buf*/,
                  bus_size_t /*buflen*/, bus_dmamap_callback_t *,
                  void */*callback_arg*/, int /*flags*/);

int   ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);

/*
 * Operations performed by ahd_dmamap_sync().
 */
#define BUS_DMASYNC_PREREAD   0x01  /* pre-read synchronization */
#define BUS_DMASYNC_POSTREAD  0x02  /* post-read synchronization */
#define BUS_DMASYNC_PREWRITE  0x04  /* pre-write synchronization */
#define BUS_DMASYNC_POSTWRITE 0x08  /* post-write synchronization */

/*
 * XXX
 * ahd_dmamap_sync is only used on buffers allocated with
 * the pci_alloc_consistent() API.  Although I'm not sure how
 * this works on architectures with a write buffer, Linux does
 * not have an API to sync "coherent" memory.  Perhaps we need
 * to do an mb()?
 */
#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)

/************************** Timer DataStructures ******************************/
typedef struct timer_list ahd_timer_t;

/********************************** Includes **********************************/
#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
#define AIC_DEBUG_REGISTERS 1
#else
#define AIC_DEBUG_REGISTERS 0
#endif
#include "aic79xx.h"

/***************************** Timer Facilities *******************************/
#define ahd_timer_init init_timer
#define ahd_timer_stop del_timer_sync
typedef void ahd_linux_callback_t (u_long);  
static __inline void ahd_timer_reset(ahd_timer_t *timer, int usec,
                             ahd_callback_t *func, void *arg);

static __inline void
ahd_timer_reset(ahd_timer_t *timer, int usec, ahd_callback_t *func, void *arg)
{
      struct ahd_softc *ahd;

      ahd = (struct ahd_softc *)arg;
      del_timer(timer);
      timer->data = (u_long)arg;
      timer->expires = jiffies + (usec * HZ)/1000000;
      timer->function = (ahd_linux_callback_t*)func;
      add_timer(timer);
}

/***************************** SMP support ************************************/
#include <linux/spinlock.h>

#define AIC79XX_DRIVER_VERSION "3.0"

/*************************** Device Data Structures ***************************/
/*
 * A per probed device structure used to deal with some error recovery
 * scenarios that the Linux mid-layer code just doesn't know how to
 * handle.  The structure allocated for a device only becomes persistent
 * after a successfully completed inquiry command to the target when
 * that inquiry data indicates a lun is present.
 */

typedef enum {
      AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
      AHD_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
      AHD_DEV_Q_TAGGED   = 0x20, /* Allow full SCSI2 command queueing */
      AHD_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
} ahd_linux_dev_flags;

struct ahd_linux_device {
      TAILQ_ENTRY(ahd_linux_device) links;

      /*
       * The number of transactions currently
       * queued to the device.
       */
      int               active;

      /*
       * The currently allowed number of 
       * transactions that can be queued to
       * the device.  Must be signed for
       * conversion from tagged to untagged
       * mode where the device may have more
       * than one outstanding active transaction.
       */
      int               openings;

      /*
       * A positive count indicates that this
       * device's queue is halted.
       */
      u_int             qfrozen;
      
      /*
       * Cumulative command counter.
       */
      u_long                  commands_issued;

      /*
       * The number of tagged transactions when
       * running at our current opening level
       * that have been successfully received by
       * this device since the last QUEUE FULL.
       */
      u_int             tag_success_count;
#define AHD_TAG_SUCCESS_INTERVAL 50

      ahd_linux_dev_flags     flags;

      /*
       * Per device timer.
       */
      struct timer_list timer;

      /*
       * The high limit for the tags variable.
       */
      u_int             maxtags;

      /*
       * The computed number of tags outstanding
       * at the time of the last QUEUE FULL event.
       */
      u_int             tags_on_last_queuefull;

      /*
       * How many times we have seen a queue full
       * with the same number of tags.  This is used
       * to stop our adaptive queue depth algorithm
       * on devices with a fixed number of tags.
       */
      u_int             last_queuefull_same_count;
#define AHD_LOCK_TAGS_COUNT 50

      /*
       * How many transactions have been queued
       * without the device going idle.  We use
       * this statistic to determine when to issue
       * an ordered tag to prevent transaction
       * starvation.  This statistic is only updated
       * if the AHD_DEV_PERIODIC_OTAG flag is set
       * on this device.
       */
      u_int             commands_since_idle_or_otag;
#define AHD_OTAG_THRESH 500
};

/********************* Definitions Required by the Core ***********************/
/*
 * Number of SG segments we require.  So long as the S/G segments for
 * a particular transaction are allocated in a physically contiguous
 * manner and are allocated below 4GB, the number of S/G segments is
 * unrestricted.
 */
#define     AHD_NSEG 128

/*
 * Per-SCB OSM storage.
 */
struct scb_platform_data {
      struct ahd_linux_device *dev;
      dma_addr_t         buf_busaddr;
      uint32_t           xfer_len;
      uint32_t           sense_resid;     /* Auto-Sense residual */
};

/*
 * Define a structure used for each host adapter.  All members are
 * aligned on a boundary >= the size of the member to honor the
 * alignment restrictions of the various platforms supported by
 * this driver.
 */
struct ahd_platform_data {
      /*
       * Fields accessed from interrupt context.
       */
      struct scsi_target *starget[AHD_NUM_TARGETS]; 

      spinlock_t         spin_lock;
      struct completion *eh_done;
      struct Scsi_Host        *host;            /* pointer to scsi host */
#define AHD_LINUX_NOIRQ ((uint32_t)~0)
      uint32_t           irq;       /* IRQ for this adapter */
      uint32_t           bios_address;
      uint32_t           mem_busaddr;     /* Mem Base Addr */
};

/************************** OS Utility Wrappers *******************************/
#define printf printk
#define M_NOWAIT GFP_ATOMIC
#define M_WAITOK 0
#define malloc(size, type, flags) kmalloc(size, flags)
#define free(ptr, type) kfree(ptr)

static __inline void ahd_delay(long);
static __inline void
ahd_delay(long usec)
{
      /*
       * udelay on Linux can have problems for
       * multi-millisecond waits.  Wait at most
       * 1024us per call.
       */
      while (usec > 0) {
            udelay(usec % 1024);
            usec -= 1024;
      }
}


/***************************** Low Level I/O **********************************/
static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
                             long port, uint16_t val);
static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
                         uint8_t *, int count);
static __inline void ahd_insb(struct ahd_softc * ahd, long port,
                         uint8_t *, int count);

static __inline uint8_t
ahd_inb(struct ahd_softc * ahd, long port)
{
      uint8_t x;

      if (ahd->tags[0] == BUS_SPACE_MEMIO) {
            x = readb(ahd->bshs[0].maddr + port);
      } else {
            x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
      }
      mb();
      return (x);
}

static __inline uint16_t
ahd_inw_atomic(struct ahd_softc * ahd, long port)
{
      uint8_t x;

      if (ahd->tags[0] == BUS_SPACE_MEMIO) {
            x = readw(ahd->bshs[0].maddr + port);
      } else {
            x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
      }
      mb();
      return (x);
}

static __inline void
ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
{
      if (ahd->tags[0] == BUS_SPACE_MEMIO) {
            writeb(val, ahd->bshs[0].maddr + port);
      } else {
            outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
      }
      mb();
}

static __inline void
ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
{
      if (ahd->tags[0] == BUS_SPACE_MEMIO) {
            writew(val, ahd->bshs[0].maddr + port);
      } else {
            outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
      }
      mb();
}

static __inline void
ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
{
      int i;

      /*
       * There is probably a more efficient way to do this on Linux
       * but we don't use this for anything speed critical and this
       * should work.
       */
      for (i = 0; i < count; i++)
            ahd_outb(ahd, port, *array++);
}

static __inline void
ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
{
      int i;

      /*
       * There is probably a more efficient way to do this on Linux
       * but we don't use this for anything speed critical and this
       * should work.
       */
      for (i = 0; i < count; i++)
            *array++ = ahd_inb(ahd, port);
}

/**************************** Initialization **********************************/
int         ahd_linux_register_host(struct ahd_softc *,
                              struct scsi_host_template *);

/*************************** Pretty Printing **********************************/
struct info_str {
      char *buffer;
      int length;
      off_t offset;
      int pos;
};

/******************************** Locking *************************************/
static __inline void
ahd_lockinit(struct ahd_softc *ahd)
{
      spin_lock_init(&ahd->platform_data->spin_lock);
}

static __inline void
ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
{
      spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
}

static __inline void
ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
{
      spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
}

/******************************* PCI Definitions ******************************/
/*
 * PCIM_xxx: mask to locate subfield in register
 * PCIR_xxx: config register offset
 * PCIC_xxx: device class
 * PCIS_xxx: device subclass
 * PCIP_xxx: device programming interface
 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 * PCID_xxx: device ID
 */
#define PCIR_DEVVENDOR        0x00
#define PCIR_VENDOR           0x00
#define PCIR_DEVICE           0x02
#define PCIR_COMMAND          0x04
#define PCIM_CMD_PORTEN       0x0001
#define PCIM_CMD_MEMEN        0x0002
#define PCIM_CMD_BUSMASTEREN  0x0004
#define PCIM_CMD_MWRICEN      0x0010
#define PCIM_CMD_PERRESPEN    0x0040
#define     PCIM_CMD_SERRESPEN      0x0100
#define PCIR_STATUS           0x06
#define PCIR_REVID            0x08
#define PCIR_PROGIF           0x09
#define PCIR_SUBCLASS         0x0a
#define PCIR_CLASS            0x0b
#define PCIR_CACHELNSZ        0x0c
#define PCIR_LATTIMER         0x0d
#define PCIR_HEADERTYPE       0x0e
#define PCIM_MFDEV            0x80
#define PCIR_BIST       0x0f
#define PCIR_CAP_PTR          0x34

/* config registers for header type 0 devices */
#define PCIR_MAPS 0x10
#define PCIR_SUBVEND_0  0x2c
#define PCIR_SUBDEV_0   0x2e

/****************************** PCI-X definitions *****************************/
#define PCIXR_COMMAND   0x96
#define PCIXR_DEVADDR   0x98
#define PCIXM_DEVADDR_FNUM    0x0003      /* Function Number */
#define PCIXM_DEVADDR_DNUM    0x00F8      /* Device Number */
#define PCIXM_DEVADDR_BNUM    0xFF00      /* Bus Number */
#define PCIXR_STATUS    0x9A
#define PCIXM_STATUS_64BIT    0x0001      /* Active 64bit connection to device. */
#define PCIXM_STATUS_133CAP   0x0002      /* Device is 133MHz capable */
#define PCIXM_STATUS_SCDISC   0x0004      /* Split Completion Discarded */
#define PCIXM_STATUS_UNEXPSC  0x0008      /* Unexpected Split Completion */
#define PCIXM_STATUS_CMPLEXDEV      0x0010      /* Device Complexity (set == bridge) */
#define PCIXM_STATUS_MAXMRDBC 0x0060      /* Maximum Burst Read Count */
#define PCIXM_STATUS_MAXSPLITS      0x0380      /* Maximum Split Transactions */
#define PCIXM_STATUS_MAXCRDS  0x1C00      /* Maximum Cumulative Read Size */
#define PCIXM_STATUS_RCVDSCEM 0x2000      /* Received a Split Comp w/Error msg */

typedef enum
{
      AHD_POWER_STATE_D0,
      AHD_POWER_STATE_D1,
      AHD_POWER_STATE_D2,
      AHD_POWER_STATE_D3
} ahd_power_state;

void ahd_power_state_change(struct ahd_softc *ahd,
                      ahd_power_state new_state);

/******************************* PCI Routines *********************************/
int                ahd_linux_pci_init(void);
void               ahd_linux_pci_exit(void);
int                ahd_pci_map_registers(struct ahd_softc *ahd);
int                ahd_pci_map_int(struct ahd_softc *ahd);

static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
                                   int reg, int width);

static __inline uint32_t
ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
{
      switch (width) {
      case 1:
      {
            uint8_t retval;

            pci_read_config_byte(pci, reg, &retval);
            return (retval);
      }
      case 2:
      {
            uint16_t retval;
            pci_read_config_word(pci, reg, &retval);
            return (retval);
      }
      case 4:
      {
            uint32_t retval;
            pci_read_config_dword(pci, reg, &retval);
            return (retval);
      }
      default:
            panic("ahd_pci_read_config: Read size too big");
            /* NOTREACHED */
            return (0);
      }
}

static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
                                int reg, uint32_t value,
                                int width);

static __inline void
ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
{
      switch (width) {
      case 1:
            pci_write_config_byte(pci, reg, value);
            break;
      case 2:
            pci_write_config_word(pci, reg, value);
            break;
      case 4:
            pci_write_config_dword(pci, reg, value);
            break;
      default:
            panic("ahd_pci_write_config: Write size too big");
            /* NOTREACHED */
      }
}

static __inline int ahd_get_pci_function(ahd_dev_softc_t);
static __inline int
ahd_get_pci_function(ahd_dev_softc_t pci)
{
      return (PCI_FUNC(pci->devfn));
}

static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
static __inline int
ahd_get_pci_slot(ahd_dev_softc_t pci)
{
      return (PCI_SLOT(pci->devfn));
}

static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
static __inline int
ahd_get_pci_bus(ahd_dev_softc_t pci)
{
      return (pci->bus->number);
}

static __inline void ahd_flush_device_writes(struct ahd_softc *);
static __inline void
ahd_flush_device_writes(struct ahd_softc *ahd)
{
      /* XXX Is this sufficient for all architectures??? */
      ahd_inb(ahd, INTSTAT);
}

/**************************** Proc FS Support *********************************/
int   ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
                      off_t, int, int);

/*********************** Transaction Access Wrappers **************************/
static __inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
static __inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
static __inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
static __inline uint32_t ahd_get_transaction_status(struct scb *);
static __inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
static __inline uint32_t ahd_get_scsi_status(struct scb *);
static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
static __inline u_long ahd_get_transfer_length(struct scb *);
static __inline int ahd_get_transfer_dir(struct scb *);
static __inline void ahd_set_residual(struct scb *, u_long);
static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
static __inline u_long ahd_get_residual(struct scb *);
static __inline u_long ahd_get_sense_residual(struct scb *);
static __inline int ahd_perform_autosense(struct scb *);
static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
                                     struct scb *);
static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
                                         struct ahd_devinfo *);
static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
                                 struct scb *scb);
static __inline void ahd_freeze_scb(struct scb *scb);

static __inline
void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
{
      cmd->result &= ~(CAM_STATUS_MASK << 16);
      cmd->result |= status << 16;
}

static __inline
void ahd_set_transaction_status(struct scb *scb, uint32_t status)
{
      ahd_cmd_set_transaction_status(scb->io_ctx,status);
}

static __inline
void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
{
      cmd->result &= ~0xFFFF;
      cmd->result |= status;
}

static __inline
void ahd_set_scsi_status(struct scb *scb, uint32_t status)
{
      ahd_cmd_set_scsi_status(scb->io_ctx, status);
}

static __inline
uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
{
      return ((cmd->result >> 16) & CAM_STATUS_MASK);
}

static __inline
uint32_t ahd_get_transaction_status(struct scb *scb)
{
      return (ahd_cmd_get_transaction_status(scb->io_ctx));
}

static __inline
uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
{
      return (cmd->result & 0xFFFF);
}

static __inline
uint32_t ahd_get_scsi_status(struct scb *scb)
{
      return (ahd_cmd_get_scsi_status(scb->io_ctx));
}

static __inline
void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
{
      /*
       * Nothing to do for linux as the incoming transaction
       * has no concept of tag/non tagged, etc.
       */
}

static __inline
u_long ahd_get_transfer_length(struct scb *scb)
{
      return (scb->platform_data->xfer_len);
}

static __inline
int ahd_get_transfer_dir(struct scb *scb)
{
      return (scb->io_ctx->sc_data_direction);
}

static __inline
void ahd_set_residual(struct scb *scb, u_long resid)
{
      scsi_set_resid(scb->io_ctx, resid);
}

static __inline
void ahd_set_sense_residual(struct scb *scb, u_long resid)
{
      scb->platform_data->sense_resid = resid;
}

static __inline
u_long ahd_get_residual(struct scb *scb)
{
      return scsi_get_resid(scb->io_ctx);
}

static __inline
u_long ahd_get_sense_residual(struct scb *scb)
{
      return (scb->platform_data->sense_resid);
}

static __inline
int ahd_perform_autosense(struct scb *scb)
{
      /*
       * We always perform autosense in Linux.
       * On other platforms this is set on a
       * per-transaction basis.
       */
      return (1);
}

static __inline uint32_t
ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
{
      return (sizeof(struct scsi_sense_data));
}

static __inline void
ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
                        struct ahd_devinfo *devinfo)
{
      /* Nothing to do here for linux */
}

static __inline void
ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
{
      ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
}

int   ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
void  ahd_platform_free(struct ahd_softc *ahd);
void  ahd_platform_init(struct ahd_softc *ahd);
void  ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);

static __inline void
ahd_freeze_scb(struct scb *scb)
{
      if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
                scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
                scb->platform_data->dev->qfrozen++;
        }
}

void  ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
                        struct ahd_devinfo *devinfo, ahd_queue_alg);
int   ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
                        char channel, int lun, u_int tag,
                        role_t role, uint32_t status);
irqreturn_t
      ahd_linux_isr(int irq, void *dev_id);
void  ahd_done(struct ahd_softc*, struct scb*);
void  ahd_send_async(struct ahd_softc *, char channel,
                   u_int target, u_int lun, ac_code);
void  ahd_print_path(struct ahd_softc *, struct scb *);

#ifdef CONFIG_PCI
#define AHD_PCI_CONFIG 1
#else
#define AHD_PCI_CONFIG 0
#endif
#define bootverbose aic79xx_verbose
extern uint32_t aic79xx_verbose;

#endif /* _AIC79XX_LINUX_H_ */

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