FreeBSD/Linux Kernel Cross Reference
sys/dev/twa/tw_cl_share.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
      * Copyright (c) 2004-05 Vinod Kashyap
      * 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.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
     *
     *      $FreeBSD$
     */
    
    /*
     * AMCC'S 3ware driver for 9000 series storage controllers.
     *
     * Author: Vinod Kashyap
     * Modifications by: Adam Radford
     * Modifications by: Manjunath Ranganathaiah
     */
    
    #ifndef TW_CL_SHARE_H
    
    #define TW_CL_SHARE_H
    
    /*
     * Macros, structures and functions shared between OSL and CL,
     * and defined by CL.
     */
    
    #define TW_CL_NULL                      ((TW_VOID *)0)
    #define TW_CL_TRUE                      1
    #define TW_CL_FALSE                     0
    
    #define TW_CL_VENDOR_ID                 0x13C1  /* 3ware vendor id */
    #define TW_CL_DEVICE_ID_9K              0x1002  /* 9000 PCI series device id */
    #define TW_CL_DEVICE_ID_9K_X            0x1003  /* 9000 PCI-X series device id */
    #define TW_CL_DEVICE_ID_9K_E            0x1004  /* 9000 PCIe series device id */
    #define TW_CL_DEVICE_ID_9K_SA           0x1005  /* 9000 PCIe SAS series device id */
    
    #define TW_CL_BAR_TYPE_IO               1       /* I/O base address */
    #define TW_CL_BAR_TYPE_MEM              2       /* memory base address */
    #define TW_CL_BAR_TYPE_SBUF             3       /* SBUF base address */
    
    #ifdef TW_OSL_ENCLOSURE_SUPPORT
    #define TW_CL_MAX_NUM_UNITS             65      /* max # of units we support
                                                    -- enclosure target id is 64 */
    #else /* TW_OSL_ENCLOSURE_SUPPORT */
    #define TW_CL_MAX_NUM_UNITS             32      /* max # of units we support */
    #endif /* TW_OSL_ENCLOSURE_SUPPORT */
    
    #define TW_CL_MAX_NUM_LUNS              255     /* max # of LUN's we support */
    #define TW_CL_MAX_IO_SIZE               0x20000 /* 128K */
    
    /*
     * Though we can support 256 simultaneous requests, we advertise as capable
     * of supporting only 255, since we want to keep one CL internal request
     * context packet always available for internal requests.
     */
    #define TW_CL_MAX_SIMULTANEOUS_REQUESTS 256     /* max simult reqs supported */
    
    #define TW_CL_MAX_32BIT_SG_ELEMENTS     109     /* max 32-bit sg elements */
    #define TW_CL_MAX_64BIT_SG_ELEMENTS     72      /* max 64-bit sg elements */
    
    /* Possible values of ctlr->flags */
    #define TW_CL_64BIT_ADDRESSES   (1<<0) /* 64 bit cmdpkt & SG addresses */
    #define TW_CL_64BIT_SG_LENGTH   (1<<1) /* 64 bit SG length */
    #define TW_CL_START_CTLR_ONLY   (1<<2) /* Start ctlr only */
    #define TW_CL_STOP_CTLR_ONLY    (1<<3) /* Stop ctlr only */
    #define TW_CL_DEFERRED_INTR_USED (1<<5) /* OS Layer uses deferred intr */
    
    /* Possible error values from the Common Layer. */
    #define TW_CL_ERR_REQ_SUCCESS                   0
    #define TW_CL_ERR_REQ_GENERAL_FAILURE           (1<<0)
    #define TW_CL_ERR_REQ_INVALID_TARGET            (1<<1)
    #define TW_CL_ERR_REQ_INVALID_LUN               (1<<2)
    #define TW_CL_ERR_REQ_SCSI_ERROR                (1<<3)
    #define TW_CL_ERR_REQ_AUTO_SENSE_VALID          (1<<4)
    #define TW_CL_ERR_REQ_BUS_RESET                 (1<<5)
    #define TW_CL_ERR_REQ_UNABLE_TO_SUBMIT_COMMAND  (1<<6)
    
   /* Possible values of req_pkt->flags */
   #define TW_CL_REQ_RETRY_ON_BUSY         (1<<0)
   #define TW_CL_REQ_CALLBACK_FOR_SGLIST   (1<<1)
   
   #define TW_CL_MESSAGE_SOURCE_CONTROLLER_ERROR   3
   #define TW_CL_MESSAGE_SOURCE_CONTROLLER_EVENT   4
   #define TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR 21
   #define TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT 22
   #define TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER     5
   #define TW_CL_MESSAGE_SOURCE_FREEBSD_OS         8
   #define TW_CL_MESSAGE_SOURCE_WINDOWS_DRIVER     7
   #define TW_CL_MESSAGE_SOURCE_WINDOWS_OS         10
   
   #define TW_CL_SEVERITY_ERROR            0x1
   #define TW_CL_SEVERITY_WARNING          0x2
   #define TW_CL_SEVERITY_INFO             0x3
   #define TW_CL_SEVERITY_DEBUG            0x4
   
   #define TW_CL_SEVERITY_ERROR_STRING     "ERROR"
   #define TW_CL_SEVERITY_WARNING_STRING   "WARNING"
   #define TW_CL_SEVERITY_INFO_STRING      "INFO"
   #define TW_CL_SEVERITY_DEBUG_STRING     "DEBUG"
   
   /*
    * Structure, a pointer to which is used as the controller handle in
    * communications between the OS Layer and the Common Layer.
    */
   struct tw_cl_ctlr_handle {
           TW_VOID *osl_ctlr_ctxt; /* OSL's ctlr context */
           TW_VOID *cl_ctlr_ctxt;  /* CL's ctlr context */
   };
   
   /*
    * Structure, a pointer to which is used as the request handle in
    * communications between the OS Layer and the Common Layer.
    */
   struct tw_cl_req_handle {
           TW_VOID *osl_req_ctxt;  /* OSL's request context */
           TW_VOID *cl_req_ctxt;   /* CL's request context */
           TW_UINT8 is_io;         /* Only freeze/release simq for IOs */
   };
   
   /* Structure used to describe SCSI requests to CL. */
   struct tw_cl_scsi_req_packet {
           TW_UINT32       unit;           /* unit # to send cmd to */
           TW_UINT32       lun;            /* LUN to send cmd to */
           TW_UINT8        *cdb;           /* ptr to SCSI cdb */
           TW_UINT32       cdb_len;        /* # of valid cdb bytes */
           TW_UINT32       sense_len;      /* # of bytes of valid sense info */
           TW_UINT8        *sense_data;    /* ptr to sense data, if any */
           TW_UINT32       scsi_status;    /* SCSI status returned by fw */
           TW_UINT32       sgl_entries;    /* # of SG descriptors */
           TW_UINT8        *sg_list;       /* ptr to SG list */
   };
   
   /* Structure used to describe pass through command packets to CL. */
   struct tw_cl_passthru_req_packet {
           TW_UINT8        *cmd_pkt;       /* ptr to passthru cmd pkt */
           TW_UINT32       cmd_pkt_length; /* size of cmd pkt */
           TW_UINT32       sgl_entries;    /* # of SG descriptors */
           TW_UINT8        *sg_list;       /* ptr to SG list */
   };
   
   /* Request packet submitted to the Common Layer, by the OS Layer. */
   struct tw_cl_req_packet {
           TW_UINT32       cmd;            /* Common Layer cmd */
           TW_UINT32       flags;          /* flags describing request */
           TW_UINT32       status;         /* Common Layer returned status */
           TW_VOID         (*tw_osl_callback)(struct tw_cl_req_handle *req_handle);
                           /* OSL routine to be called by CL on req completion */
           TW_VOID         (*tw_osl_sgl_callback)(
                           struct tw_cl_req_handle *req_handle, TW_VOID *sg_list,
                           TW_UINT32 *num_sgl_entries);
                           /* OSL callback to get SG list. */
   
           union {
                   struct tw_cl_scsi_req_packet            scsi_req; /* SCSI req */
                   struct tw_cl_passthru_req_packet        pt_req;/*Passthru req*/
           } gen_req_pkt;
   };
   
   #pragma pack(1)
   /*
    * Packet that describes an AEN/error generated by the controller,
    * Common Layer, or even the OS Layer.
    */
   struct tw_cl_event_packet {
           TW_UINT32       sequence_id;
           TW_UINT32       time_stamp_sec;
           TW_UINT16       aen_code;
           TW_UINT8        severity;
           TW_UINT8        retrieved;
           TW_UINT8        repeat_count;
           TW_UINT8        parameter_len;
           TW_UINT8        parameter_data[98];
           TW_UINT32       event_src;
           TW_UINT8        severity_str[20];
   };
   #pragma pack()
   
   /* Structure to link 2 adjacent elements in a list. */
   struct tw_cl_link {
           struct tw_cl_link       *next;
           struct tw_cl_link       *prev;
   };
   
   #pragma pack(1)
   /* Scatter/Gather list entry with 32 bit addresses. */
   struct tw_cl_sg_desc32 {
           TW_UINT32       address;
           TW_UINT32       length;
   };
   
   /* Scatter/Gather list entry with 64 bit addresses. */
   struct tw_cl_sg_desc64 {
           TW_UINT64       address;
           TW_UINT32       length;
   };
   
   #pragma pack()
   
   /* Byte swap functions.  Valid only if running on big endian platforms. */
   #ifdef TW_OSL_BIG_ENDIAN
   
   #define TW_CL_SWAP16_WITH_CAST(x)                                       \
           ((x << 8) | (x >> 8))
   
   #define TW_CL_SWAP32_WITH_CAST(x)                                       \
           ((x << 24) | ((x << 8) & (0xFF0000)) |                          \
           ((x >> 8) & (0xFF00)) | (x >> 24))
   
   #define TW_CL_SWAP64_WITH_CAST(x)                                       \
           ((((TW_UINT64)(TW_CL_SWAP32(((TW_UINT32 *)(&(x)))[1]))) << 32) |\
           ((TW_UINT32)(TW_CL_SWAP32(((TW_UINT32 *)(&(x)))[0]))))
   
   #else /* TW_OSL_BIG_ENDIAN */
   
   #define TW_CL_SWAP16_WITH_CAST(x)       x
   #define TW_CL_SWAP32_WITH_CAST(x)       x
   #define TW_CL_SWAP64_WITH_CAST(x)       x
   
   #endif /* TW_OSL_BIG_ENDIAN */
   
   #define TW_CL_SWAP16(x)         TW_CL_SWAP16_WITH_CAST((TW_UINT16)(x))
   #define TW_CL_SWAP32(x)         TW_CL_SWAP32_WITH_CAST((TW_UINT32)(x))
   #define TW_CL_SWAP64(x)         TW_CL_SWAP64_WITH_CAST((TW_UINT64)(x))
   
   /* Queue manipulation functions. */
   
   /* Initialize a queue. */
   #define TW_CL_Q_INIT(head)      do {            \
           (head)->prev = (head)->next = head;     \
   } while (0)
   
   /* Insert an item at the head of the queue. */
   #define TW_CL_Q_INSERT_HEAD(head, item) do {    \
           (item)->next = (head)->next;            \
           (item)->prev = head;                    \
           (head)->next->prev = item;              \
           (head)->next = item;                    \
   } while (0)
   
   /* Insert an item at the tail of the queue. */
   #define TW_CL_Q_INSERT_TAIL(head, item) do {    \
           (item)->next = head;                    \
           (item)->prev = (head)->prev;            \
           (head)->prev->next = item;              \
           (head)->prev = item;                    \
   } while (0)
   
   /* Remove an item from the head of the queue. */
   #define TW_CL_Q_REMOVE_ITEM(head, item) do {    \
           (item)->prev->next = (item)->next;      \
           (item)->next->prev = (item)->prev;      \
   } while (0)
   
   /* Retrieve the item at the head of the queue. */
   #define TW_CL_Q_FIRST_ITEM(head)                \
           (((head)->next != head) ? ((head)->next) : TW_CL_NULL)
   
   /* Retrieve the item at the tail of the queue. */
   #define TW_CL_Q_LAST_ITEM(head)                 \
           (((head)->prev != head) ? ((head)->prev) : TW_CL_NULL)
   
   /* Retrieve the item next to a given item in the queue. */
   #define TW_CL_Q_NEXT_ITEM(head, item)           \
           (((item)->next != head) ? ((item)->next) : TW_CL_NULL)
   
   /* Retrieve the item previous to a given item in the queue. */
   #define TW_CL_Q_PREV_ITEM(head, item)           \
           (((item)->prev != head) ? ((item)->prev) : TW_CL_NULL)
   
   /* Determine the offset of a field from the head of the structure it is in. */
   #define TW_CL_STRUCT_OFFSET(struct_type, field) \
           (TW_INT8 *)(&((struct_type *)0)->field)
   
   /*
    * Determine the address of the head of a structure, given the address of a
    * field within it.
    */
   #define TW_CL_STRUCT_HEAD(addr, struct_type, field)     \
           (struct_type *)((TW_INT8 *)addr -               \
           TW_CL_STRUCT_OFFSET(struct_type, field))
   
   #ifndef TW_BUILDING_API
   
   #include "tw_osl_inline.h"
   
   /*
    * The following are extern declarations of OS Layer defined functions called
    * by the Common Layer.  If any function has been defined as a macro in
    * tw_osl_share.h, we will not make the extern declaration here.
    */
   
   #ifndef tw_osl_breakpoint
   /* Allows setting breakpoints in the CL code for debugging purposes. */
   extern TW_VOID  tw_osl_breakpoint(TW_VOID);
   #endif
   
   #ifndef tw_osl_timeout
   /* Start OS timeout() routine after controller reset sequence */
   extern TW_VOID  tw_osl_timeout(struct tw_cl_req_handle *req_handle);
   #endif
   
   #ifndef tw_osl_untimeout
   /* Stop OS timeout() routine during controller reset sequence */
   extern TW_VOID  tw_osl_untimeout(struct tw_cl_req_handle *req_handle);
   #endif
   
   #ifndef tw_osl_cur_func
   /* Text name of current function. */
   extern TW_INT8  *tw_osl_cur_func(TW_VOID);
   #endif
   
   #ifdef TW_OSL_DEBUG
   #ifndef tw_osl_dbg_printf
   /* Print to syslog/event log/debug console, as applicable. */
   extern TW_INT32 tw_osl_dbg_printf(struct tw_cl_ctlr_handle *ctlr_handle,
           const TW_INT8 *fmt, ...);
   #endif
   #endif /* TW_OSL_DEBUG */
   
   #ifndef tw_osl_delay
   /* Cause a delay of usecs micro-seconds. */
   extern TW_VOID  tw_osl_delay(TW_INT32 usecs);
   #endif
   
   #ifndef tw_osl_destroy_lock
   /* Create/initialize a lock for CL's use. */
   extern TW_VOID  tw_osl_destroy_lock(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_LOCK_HANDLE *lock);
   #endif
   
   #ifndef tw_osl_free_lock
   /* Free a previously held lock. */
   extern TW_VOID  tw_osl_free_lock(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_LOCK_HANDLE *lock);
   #endif
   
   #ifndef tw_osl_get_local_time
   /* Get local time. */
   extern TW_TIME  tw_osl_get_local_time(TW_VOID);
   #endif
   
   #ifndef tw_osl_get_lock
   /* Acquire a lock. */
   extern TW_VOID  tw_osl_get_lock(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_LOCK_HANDLE *lock);
   #endif
   
   #ifndef tw_osl_init_lock
   /* Create/initialize a lock for CL's use. */
   extern TW_VOID  tw_osl_init_lock(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_INT8 *lock_name, TW_LOCK_HANDLE *lock);
   #endif
   
   #ifndef tw_osl_memcpy
   /* Copy 'size' bytes from 'src' to 'dest'. */
   extern TW_VOID  tw_osl_memcpy(TW_VOID *src, TW_VOID *dest, TW_INT32 size);
   #endif
   
   #ifndef tw_osl_memzero
   /* Zero 'size' bytes starting at 'addr'. */
   extern TW_VOID  tw_osl_memzero(TW_VOID *addr, TW_INT32 size);
   #endif
   
   #ifndef tw_osl_notify_event
   /* Notify OSL of a controller/CL (or even OSL) event. */
   extern TW_VOID  tw_osl_notify_event(struct tw_cl_ctlr_handle *ctlr_handle,
           struct tw_cl_event_packet *event);
   #endif
   
   #ifdef TW_OSL_PCI_CONFIG_ACCESSIBLE
   #ifndef tw_osl_read_pci_config
   /* Read 'size' bytes from 'offset' in the PCI config space. */
   extern TW_UINT32 tw_osl_read_pci_config(
           struct tw_cl_ctlr_handle *ctlr_handle, TW_INT32 offset, TW_INT32 size);
   #endif
   #endif /* TW_OSL_PCI_CONFIG_ACCESSIBLE */
   
   #ifndef tw_osl_read_reg
   /* Read 'size' bytes at 'offset' from base address of this controller. */
   extern TW_UINT32 tw_osl_read_reg(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_INT32 offset, TW_INT32 size);
   #endif
   
   #ifndef tw_osl_scan_bus
   /* Request OSL for a bus scan. */
   extern TW_VOID  tw_osl_scan_bus(struct tw_cl_ctlr_handle *ctlr_handle);
   #endif
   
   #ifdef TW_OSL_CAN_SLEEP
   #ifndef tw_osl_sleep
   /* Sleep for 'timeout' ms or until woken up (by tw_osl_wakeup). */
   extern TW_INT32 tw_osl_sleep(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_SLEEP_HANDLE *sleep_handle, TW_INT32 timeout);
   #endif
   #endif /* TW_OSL_CAN_SLEEP */
   
   #ifndef tw_osl_sprintf
   /* Standard sprintf. */
   extern TW_INT32 tw_osl_sprintf(TW_INT8 *dest, const TW_INT8 *fmt, ...);
   #endif
   
   #ifndef tw_osl_strcpy
   /* Copy string 'src' to 'dest'. */
   extern TW_INT8  *tw_osl_strcpy(TW_INT8 *dest, TW_INT8 *src);
   #endif
   
   #ifndef tw_osl_strlen
   /* Return length of string pointed at by 'str'. */
   extern TW_INT32 tw_osl_strlen(TW_VOID *str);
   #endif
   
   #ifndef tw_osl_vsprintf
   /* Standard vsprintf. */
   extern TW_INT32 tw_osl_vsprintf(TW_INT8 *dest, const TW_INT8 *fmt, va_list ap);
   #endif
   
   #ifdef TW_OSL_CAN_SLEEP
   #ifndef tw_osl_wakeup
   /* Wake up a thread sleeping by a call to tw_osl_sleep. */
   extern TW_VOID  tw_osl_wakeup(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_SLEEP_HANDLE *sleep_handle);
   #endif
   #endif /* TW_OSL_CAN_SLEEP */
   
   #ifdef TW_OSL_PCI_CONFIG_ACCESSIBLE
   #ifndef tw_osl_write_pci_config
   /* Write 'value' of 'size' bytes at 'offset' in the PCI config space. */
   extern TW_VOID  tw_osl_write_pci_config(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_INT32 offset, TW_INT32 value, TW_INT32 size);
   #endif
   #endif /* TW_OSL_PCI_CONFIG_ACCESSIBLE */
   
   #ifndef tw_osl_write_reg
   /*
    * Write 'value' of 'size' (max 4) bytes at 'offset' from base address of
    * this controller.
    */
   extern TW_VOID  tw_osl_write_reg(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_INT32 offset, TW_INT32 value, TW_INT32 size);
   #endif
   
   /* Functions in the Common Layer */
   
   /* Creates and queues AEN's.  Also notifies OS Layer. */
   extern TW_VOID tw_cl_create_event(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_UINT8 queue_event, TW_UINT8 event_src, TW_UINT16 event_code,
           TW_UINT8 severity, TW_UINT8 *severity_str, TW_UINT8 *event_desc,
           TW_UINT8 *event_specific_desc, ...);
   
   /* Indicates whether a ctlr is supported by CL. */
   extern TW_INT32 tw_cl_ctlr_supported(TW_INT32 vendor_id, TW_INT32 device_id);
   
   /* Submit a firmware cmd packet. */
   extern TW_INT32 tw_cl_fw_passthru(struct tw_cl_ctlr_handle *ctlr_handle,
           struct tw_cl_req_packet *req_pkt, struct tw_cl_req_handle *req_handle);
   
   /* Find out how much memory CL needs. */
   extern TW_INT32 tw_cl_get_mem_requirements(
           struct tw_cl_ctlr_handle *ctlr_handle, TW_UINT32 flags,
           TW_INT32 device_id, TW_INT32 max_simult_reqs, TW_INT32 max_aens,
           TW_UINT32 *alignment, TW_UINT32 *sg_size_factor,
           TW_UINT32 *non_dma_mem_size, TW_UINT32 *dma_mem_size
           );
   
   /* Return PCI BAR info. */
   extern TW_INT32 tw_cl_get_pci_bar_info(TW_INT32 device_id, TW_INT32 bar_type,
           TW_INT32 *bar_num, TW_INT32 *bar0_offset, TW_INT32 *bar_size);
   
   /* Initialize Common Layer for a given controller. */
   extern TW_INT32 tw_cl_init_ctlr(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_UINT32 flags, TW_INT32 device_id, TW_INT32 max_simult_reqs,
           TW_INT32 max_aens, TW_VOID *non_dma_mem, TW_VOID *dma_mem,
           TW_UINT64 dma_mem_phys
           );
   
   extern TW_VOID  tw_cl_set_reset_needed(struct tw_cl_ctlr_handle *ctlr_handle);
   extern TW_INT32 tw_cl_is_reset_needed(struct tw_cl_ctlr_handle *ctlr_handle);
   extern TW_INT32 tw_cl_is_active(struct tw_cl_ctlr_handle *ctlr_handle);
   
   /* CL's interrupt handler. */
   extern TW_INT32 tw_cl_interrupt(struct tw_cl_ctlr_handle *ctlr_handle);
   
   /* CL's ioctl handler. */
   extern TW_INT32 tw_cl_ioctl(struct tw_cl_ctlr_handle *ctlr_handle,
           u_long cmd, TW_VOID *buf);
   
   #ifdef TW_OSL_DEBUG
   /* Print CL's state/statistics for a controller. */
   extern TW_VOID  tw_cl_print_ctlr_stats(struct tw_cl_ctlr_handle *ctlr_handle);
   
   /* Prints CL internal details of a given request. */
   extern TW_VOID  tw_cl_print_req_info(struct tw_cl_req_handle *req_handle);
   #endif /* TW_OSL_DEBUG */
   
   /* Soft reset controller. */
   extern TW_INT32 tw_cl_reset_ctlr(struct tw_cl_ctlr_handle *ctlr_handle);
   
   #ifdef TW_OSL_DEBUG
   /* Reset CL's statistics for a controller. */
   extern TW_VOID  tw_cl_reset_stats(struct tw_cl_ctlr_handle *ctlr_handle);
   #endif /* TW_OSL_DEBUG */
   
   /* Stop a controller. */
   extern TW_INT32 tw_cl_shutdown_ctlr(struct tw_cl_ctlr_handle *ctlr_handle,
           TW_UINT32 flags);
   
   /* Submit a SCSI I/O request. */
   extern TW_INT32 tw_cl_start_io(struct tw_cl_ctlr_handle *ctlr_handle,
           struct tw_cl_req_packet *req_pkt, struct tw_cl_req_handle *req_handle);
   
   #endif /* TW_BUILDING_API */
   
   #endif /* TW_CL_SHARE_H */

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