FreeBSD/Linux Kernel Cross Reference
sys/dev/amr/amrvar.h

     /*-
      * Copyright (c) 1999,2000 Michael Smith
      * Copyright (c) 2000 BSDi
      * 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.
     *
     * Copyright (c) 2002 Eric Moore
     * Copyright (c) 2002 LSI Logic Corporation
     * 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.
     * 3. The party using or redistributing the source code and binary forms
     *    agrees to the disclaimer below and the terms and conditions set forth
     *    herein.
     *
     * 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: releng/6.0/sys/dev/amr/amrvar.h 140688 2005-01-23 23:25:41Z scottl $
     */
    
    #if __FreeBSD_version >= 500005
    # include <geom/geom_disk.h>
    # include <sys/lock.h>
    # include <sys/mutex.h>
    #endif
    
    #define LSI_DESC_PCI "LSILogic MegaRAID 1.51"
    
    #ifdef AMR_DEBUG
    # define debug(level, fmt, args...)     do {if (level <= AMR_DEBUG) printf("%s: " fmt "\n", __func__ , ##args);} while(0)
    # define debug_called(level)            do {if (level <= AMR_DEBUG) printf("%s: called\n", __func__);} while(0)
    #else
    # define debug(level, fmt, args...)
    # define debug_called(level)
    #endif
    #define xdebug(fmt, args...)    printf("%s: " fmt "\n", __func__ , ##args)
    
    /*
     * Per-logical-drive datastructure
     */
    struct amr_logdrive
    {
        u_int32_t   al_size;
        int         al_state;
        int         al_properties;
        
        /* synthetic geometry */
        int         al_cylinders;
        int         al_heads;
        int         al_sectors;
        
        /* driver */
        device_t    al_disk;
    };
    
    /*
     * Due to the difficulty of using the zone allocator to create a new
     * zone from within a module, we use our own clustering to reduce 
     * memory wastage due to allocating lots of these small structures.
     *
     * 16k gives us a little under 200 command structures, which should
    * normally be plenty.  We will grab more if we need them.
    */
   
   #define AMR_CMD_CLUSTERSIZE     (16 * 1024)
   
   /*
    * Per-command control structure.
    */
   struct amr_command
   {
       TAILQ_ENTRY(amr_command)    ac_link;
   
       struct amr_softc            *ac_sc;
       u_int8_t                    ac_slot;
       int                         ac_status;      /* command completion status */
       struct amr_mailbox          ac_mailbox;
       int                         ac_flags;
   #define AMR_CMD_DATAIN          (1<<0)
   #define AMR_CMD_DATAOUT         (1<<1)
   #define AMR_CMD_CCB_DATAIN      (1<<2)
   #define AMR_CMD_CCB_DATAOUT     (1<<3)
   #define AMR_CMD_PRIORITY        (1<<4)
   #define AMR_CMD_MAPPED          (1<<5)
   #define AMR_CMD_SLEEP           (1<<6)
   #define AMR_CMD_BUSY            (1<<7)
   
       struct bio                  *ac_bio;
   
       void                        *ac_data;
       size_t                      ac_length;
       bus_dmamap_t                ac_dmamap;
       u_int32_t                   ac_dataphys;
   
       void                        *ac_ccb_data;
       size_t                      ac_ccb_length;
       bus_dmamap_t                ac_ccb_dmamap;
       u_int32_t                   ac_ccb_dataphys;
   
       void                        (* ac_complete)(struct amr_command *ac);
       void                        *ac_private;
   };
   
   struct amr_command_cluster
   {
       TAILQ_ENTRY(amr_command_cluster)    acc_link;
       struct amr_command          acc_command[0];
   };
   
   #define AMR_CMD_CLUSTERCOUNT    ((AMR_CMD_CLUSTERSIZE - sizeof(struct amr_command_cluster)) /   \
                                    sizeof(struct amr_command))
   
   /*
    * Per-controller-instance data
    */
   struct amr_softc 
   {
       /* bus attachments */
       device_t                    amr_dev;
       struct resource             *amr_reg;               /* control registers */
       bus_space_handle_t          amr_bhandle;
       bus_space_tag_t             amr_btag;
       bus_dma_tag_t               amr_parent_dmat;        /* parent DMA tag */
       bus_dma_tag_t               amr_buffer_dmat;        /* data buffer DMA tag */
       struct resource             *amr_irq;               /* interrupt */
       void                        *amr_intr;
   
       /* mailbox */
       volatile struct amr_mailbox         *amr_mailbox;
       volatile struct amr_mailbox64       *amr_mailbox64;
       u_int32_t                   amr_mailboxphys;
       bus_dma_tag_t               amr_mailbox_dmat;
       bus_dmamap_t                amr_mailbox_dmamap;
   
       /* scatter/gather lists and their controller-visible mappings */
       struct amr_sgentry          *amr_sgtable;           /* s/g lists */
       u_int32_t                   amr_sgbusaddr;          /* s/g table base address in bus space */
       bus_dma_tag_t               amr_sg_dmat;            /* s/g buffer DMA tag */
       bus_dmamap_t                amr_sg_dmamap;          /* map for s/g buffers */
   
       /* controller limits and features */
       int                         amr_nextslot;           /* Next slot to use for newly allocated commands */
       int                         amr_maxio;              /* maximum number of I/O transactions */
       int                         amr_maxdrives;          /* max number of logical drives */
       int                         amr_maxchan;            /* count of SCSI channels */
       
       /* connected logical drives */
       struct amr_logdrive         amr_drive[AMR_MAXLD];
   
       /* controller state */
       int                         amr_state;
   #define AMR_STATE_OPEN          (1<<0)
   #define AMR_STATE_SUSPEND       (1<<1)
   #define AMR_STATE_INTEN         (1<<2)
   #define AMR_STATE_SHUTDOWN      (1<<3)
   #define AMR_STATE_CRASHDUMP     (1<<4)
   #define AMR_STATE_QUEUE_FRZN    (1<<5)
   
       /* per-controller queues */
       struct bio_queue_head       amr_bioq;               /* pending I/O with no commands */
       TAILQ_HEAD(,amr_command)    amr_ready;              /* commands ready to be submitted */
       struct amr_command          *amr_busycmd[AMR_MAXCMD];
       int                         amr_busyslots;
       TAILQ_HEAD(,amr_command)    amr_completed;
       TAILQ_HEAD(,amr_command)    amr_freecmds;
       TAILQ_HEAD(,amr_command_cluster)    amr_cmd_clusters;
   
       /* CAM attachments for passthrough */
       struct cam_sim              *amr_cam_sim[AMR_MAX_CHANNELS];
       TAILQ_HEAD(, ccb_hdr)       amr_cam_ccbq;
       struct cam_devq             *amr_cam_devq;
   
       /* control device */
       struct cdev *amr_dev_t;
   
       /* controller type-specific support */
       int                         amr_type;
   #define AMR_TYPE_QUARTZ         (1<<0)
   #define AMR_IS_QUARTZ(sc)       ((sc)->amr_type & AMR_TYPE_QUARTZ)
   #define AMR_TYPE_40LD           (1<<1)
   #define AMR_IS_40LD(sc)         ((sc)->amr_type & AMR_TYPE_40LD)
       int                         (* amr_submit_command)(struct amr_softc *sc);
       int                         (* amr_get_work)(struct amr_softc *sc, struct amr_mailbox *mbsave);
       int                         (*amr_poll_command)(struct amr_command *ac);
       int                         (*amr_poll_command1)(struct amr_softc *sc, struct amr_command *ac);
       int                         support_ext_cdb;        /* greater than 10 byte cdb support */
   
       /* misc glue */
       struct intr_config_hook     amr_ich;                /* wait-for-interrupts probe hook */
       struct callout_handle       amr_timeout;            /* periodic status check */
       struct mtx                  amr_io_lock;
   };
   
   /*
    * Interface between bus connections and driver core.
    */
   extern int              amr_attach(struct amr_softc *sc);
   extern void             amr_free(struct amr_softc *sc);
   extern int              amr_flush(struct amr_softc *sc);
   extern int              amr_done(struct amr_softc *sc);
   extern void             amr_startio(struct amr_softc *sc);
   
   /*
    * Command buffer allocation.
    */
   extern struct amr_command       *amr_alloccmd(struct amr_softc *sc);
   extern void                     amr_releasecmd(struct amr_command *ac);
   
   /*
    * CAM interface
    */
   extern int              amr_cam_attach(struct amr_softc *sc);
   extern void             amr_cam_detach(struct amr_softc *sc);
   extern int              amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
   
   /*
    * MegaRAID logical disk driver
    */
   struct amrd_softc 
   {
       device_t            amrd_dev;
       struct amr_softc    *amrd_controller;
       struct amr_logdrive *amrd_drive;
       struct disk         *amrd_disk;
       int                 amrd_unit;
   };
   
   /*
    * Interface between driver core and disk driver (should be using a bus?)
    */
   extern int      amr_submit_bio(struct amr_softc *sc, struct bio *bio);
   extern int      amr_dump_blocks(struct amr_softc *sc, int unit, u_int32_t lba, void *data, int blks);
   extern void     amrd_intr(void *data);
   
   /********************************************************************************
    * Enqueue/dequeue functions
    */
   static __inline void
   amr_enqueue_bio(struct amr_softc *sc, struct bio *bio)
   {
       int         s;
   
       s = splbio();
       bioq_insert_tail(&sc->amr_bioq, bio);
       splx(s);
   }
   
   static __inline struct bio *
   amr_dequeue_bio(struct amr_softc *sc)
   {
       struct bio  *bio;
       int         s;
   
       s = splbio();
       if ((bio = bioq_first(&sc->amr_bioq)) != NULL)
           bioq_remove(&sc->amr_bioq, bio);
       splx(s);
       return(bio);
   }
   
   static __inline void
   amr_enqueue_ready(struct amr_command *ac)
   {
       int         s;
   
       s = splbio();
       TAILQ_INSERT_TAIL(&ac->ac_sc->amr_ready, ac, ac_link);
       splx(s);
   }
   
   static __inline void
   amr_requeue_ready(struct amr_command *ac)
   {
       int         s;
   
       s = splbio();
       TAILQ_INSERT_HEAD(&ac->ac_sc->amr_ready, ac, ac_link);
       splx(s);
   }
   
   static __inline struct amr_command *
   amr_dequeue_ready(struct amr_softc *sc)
   {
       struct amr_command  *ac;
       int                 s;
   
       s = splbio();
       if ((ac = TAILQ_FIRST(&sc->amr_ready)) != NULL)
           TAILQ_REMOVE(&sc->amr_ready, ac, ac_link);
       splx(s);
       return(ac);
   }
   
   static __inline void
   amr_enqueue_completed(struct amr_command *ac)
   {
       int         s;
   
       s = splbio();
       TAILQ_INSERT_TAIL(&ac->ac_sc->amr_completed, ac, ac_link);
       splx(s);
   }
   
   static __inline struct amr_command *
   amr_dequeue_completed(struct amr_softc *sc)
   {
       struct amr_command  *ac;
       int                 s;
   
       s = splbio();
       if ((ac = TAILQ_FIRST(&sc->amr_completed)) != NULL)
           TAILQ_REMOVE(&sc->amr_completed, ac, ac_link);
       splx(s);
       return(ac);
   }
   
   static __inline void
   amr_enqueue_free(struct amr_command *ac)
   {
       int         s;
   
       s = splbio();
       TAILQ_INSERT_TAIL(&ac->ac_sc->amr_freecmds, ac, ac_link);
       splx(s);
   }
   
   static __inline struct amr_command *
   amr_dequeue_free(struct amr_softc *sc)
   {
       struct amr_command  *ac;
       int                 s;
   
       s = splbio();
       if ((ac = TAILQ_FIRST(&sc->amr_freecmds)) != NULL)
           TAILQ_REMOVE(&sc->amr_freecmds, ac, ac_link);
       splx(s);
       return(ac);
   }

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