FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/twevar.h

     /*      $NetBSD: twevar.h,v 1.20.2.1 2004/05/30 07:10:47 tron Exp $     */
     
     /*-
      * Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Andrew Doran.
      *
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    #ifndef _PCI_TWEVAR_H_
    #define _PCI_TWEVAR_H_
    
    #include "locators.h"
    
    #define TWE_MAX_QUEUECNT        129
    
    /* Callbacks from controller to array. */
    struct twe_callbacks {
            void    (*tcb_openings)(struct device *, int);
    };
    
    /* Per-array drive information. */
    struct twe_drive {
            uint32_t                td_size;
            uint8_t                 td_type;
            uint8_t                 td_stripe;
    
            struct device           *td_dev;
            const struct twe_callbacks *td_callbacks;
    };
    
    /* Per-controller state. */
    struct twe_softc {
            struct device           sc_dv;
            bus_space_tag_t         sc_iot;
            bus_space_handle_t      sc_ioh;
            bus_dma_tag_t           sc_dmat;
            bus_dmamap_t            sc_dmamap;
            void                    *sc_ih;
            caddr_t                 sc_cmds;
            bus_addr_t              sc_cmds_paddr;
            int                     sc_nccbs;
            struct twe_ccb          *sc_ccbs;
            SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue;
            SLIST_HEAD(, twe_ccb)   sc_ccb_freelist;
            int                     sc_flags;
            int                     sc_openings;
            int                     sc_nunits;
            struct twe_drive        sc_units[TWE_MAX_UNITS];
    
            /* Asynchronous event notification queue for management tools. */
    #define TWE_AEN_Q_LENGTH        256
            uint16_t                sc_aen_queue[TWE_AEN_Q_LENGTH];
            int                     sc_aen_head;
            int                     sc_aen_tail;
    };
    #define TWEF_OPEN       0x01    /* control device is opened */
    #define TWEF_AENQ_WAIT  0x02    /* someone waiting for AENs */
    #define TWEF_AEN        0x04    /* AEN fetch in progress */
    #define TWEF_WAIT_CCB   0x08    /* someone waiting for a CCB */
    
    /* Optional per-command context. */
    struct twe_context {
            void    (*tx_handler)(struct twe_ccb *, int);
            void    *tx_context;
            struct  device  *tx_dv;
    };
    
    /* Command control block. */
    struct twe_ccb {
           union {
                   SIMPLEQ_ENTRY(twe_ccb) simpleq;
                   SLIST_ENTRY(twe_ccb) slist;
           } ccb_chain;
           struct twe_cmd  *ccb_cmd;
           int             ccb_cmdid;
           int             ccb_flags;
           void            *ccb_data;
           int             ccb_datasize;
           vaddr_t         ccb_abuf;
           bus_dmamap_t    ccb_dmamap_xfer;
           struct twe_context ccb_tx;
   };
   #define TWE_CCB_DATA_IN         0x01    /* Map describes inbound xfer */
   #define TWE_CCB_DATA_OUT        0x02    /* Map describes outbound xfer */
   #define TWE_CCB_COMPLETE        0x04    /* Command completed */
   #define TWE_CCB_ACTIVE          0x08    /* Command active */
   #define TWE_CCB_AEN             0x10    /* For AEN retrieval */
   #define TWE_CCB_ALLOCED         0x20    /* CCB allocated */
   
   struct twe_attach_args {
           int             twea_unit;
   };
   
   #define tweacf_unit     cf_loc[TWECF_UNIT]
   
   struct twe_ccb *twe_ccb_alloc(struct twe_softc *, int);
   struct twe_ccb *twe_ccb_alloc_wait(struct twe_softc *, int);
   void    twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb);
   void    twe_ccb_free(struct twe_softc *sc, struct twe_ccb *);
   int     twe_ccb_map(struct twe_softc *, struct twe_ccb *);
   int     twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int);
   int     twe_ccb_submit(struct twe_softc *, struct twe_ccb *);
   void    twe_ccb_unmap(struct twe_softc *, struct twe_ccb *);
   
   void    twe_ccb_wait_handler(struct twe_ccb *, int);
   
   int     twe_param_get(struct twe_softc *, int, int, size_t,
               void (*)(struct twe_ccb *, int), struct twe_param **);
   int     twe_param_get_1(struct twe_softc *, int, int, uint8_t *);
   int     twe_param_get_2(struct twe_softc *, int, int, uint16_t *);
   int     twe_param_get_4(struct twe_softc *, int, int, uint32_t *);
   
   void    twe_register_callbacks(struct twe_softc *, int,
               const struct twe_callbacks *);
   
   static __inline__ size_t twe_get_maxsegs(void) {
           size_t max_segs = ((MAXPHYS + PAGE_SIZE - 1) / PAGE_SIZE) + 1;
   #ifdef TWE_SG_SIZE
           if (TWE_SG_SIZE < max_segs)
               max_segs = TWE_SG_SIZE;
   #endif
           return max_segs;
   }
   
   static __inline__ size_t twe_get_maxxfer(size_t maxsegs) {
           return (maxsegs - 1) * PAGE_SIZE;
   }
   
   /*
    * Structures used to convert numeric codes to strings.
    */
   struct twe_code_table {
           uint32_t        code;
           const char      *string;
   };
   extern const struct twe_code_table twe_table_status[];
   extern const struct twe_code_table twe_table_unitstate[];
   extern const struct twe_code_table twe_table_unittype[];
   extern const struct twe_code_table twe_table_stripedepth[];
   extern const struct twe_code_table twe_table_aen[];
   
   const char *twe_describe_code(const struct twe_code_table *, uint32_t);
   
   #endif  /* !_PCI_TWEVAR_H_ */

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