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

     /*
      * 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_OSL_H
    
    #define TW_OSL_H
    
    
    /*
     * OS Layer internal macros, structures and functions.
     */
    
    
    #define TW_OSLI_DEVICE_NAME             "3ware 9000 series Storage Controller"
    
    #define TW_OSLI_MALLOC_CLASS            M_TWA
    #define TW_OSLI_MAX_NUM_REQUESTS        TW_CL_MAX_SIMULTANEOUS_REQUESTS
    /* Reserve two command packets.  One for ioctls and one for AENs */
    #define TW_OSLI_MAX_NUM_IOS             (TW_OSLI_MAX_NUM_REQUESTS - 2)
    #define TW_OSLI_MAX_NUM_AENS            0x100
    
    /* Possible values of req->state. */
    #define TW_OSLI_REQ_STATE_INIT          0x0     /* being initialized */
    #define TW_OSLI_REQ_STATE_BUSY          0x1     /* submitted to CL */
    #define TW_OSLI_REQ_STATE_PENDING       0x2     /* in pending queue */
    #define TW_OSLI_REQ_STATE_COMPLETE      0x3     /* completed by CL */
    
    /* Possible values of req->flags. */
    #define TW_OSLI_REQ_FLAGS_DATA_IN       (1<<0)  /* read request */
    #define TW_OSLI_REQ_FLAGS_DATA_OUT      (1<<1)  /* write request */
    #define TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED (1<<2)/* data in ccb is misaligned,
                                            have to copy to/from private buffer */
    #define TW_OSLI_REQ_FLAGS_MAPPED        (1<<3)  /* request has been mapped */
    #define TW_OSLI_REQ_FLAGS_IN_PROGRESS   (1<<4)  /* bus_dmamap_load returned
                                                    EINPROGRESS */
    #define TW_OSLI_REQ_FLAGS_PASSTHRU      (1<<5)  /* pass through request */
    #define TW_OSLI_REQ_FLAGS_SLEEPING      (1<<6)  /* owner sleeping on this cmd */
    #define TW_OSLI_REQ_FLAGS_FAILED        (1<<7)  /* bus_dmamap_load() failed */
    
    
    #ifdef TW_OSL_DEBUG
    struct tw_osli_q_stats {
            TW_UINT32       cur_len;        /* current # of items in q */
            TW_UINT32       max_len;        /* max value reached by q_length */
    };
    #endif /* TW_OSL_DEBUG */
    
    
    /* Queues of OSL internal request context packets. */
    #define TW_OSLI_FREE_Q          0       /* free q */
    #define TW_OSLI_BUSY_Q          1       /* q of reqs submitted to CL */
    #define TW_OSLI_Q_COUNT         2       /* total number of queues */
    
    /* Driver's request packet. */
    struct tw_osli_req_context {
            struct tw_cl_req_handle req_handle;/* tag to track req b/w OSL & CL */
            struct mtx              ioctl_wake_timeout_lock_handle;/* non-spin lock used to detect ioctl timeout */
            struct mtx              *ioctl_wake_timeout_lock;/* ptr to above lock */
            struct twa_softc        *ctlr;  /* ptr to OSL's controller context */
            TW_VOID                 *data;  /* ptr to data being passed to CL */
            TW_UINT32               length; /* length of buf being passed to CL */
            TW_UINT64               deadline;/* request timeout (in absolute time) */
    
           /*
            * ptr to, and length of data passed to us from above, in case a buffer
            * copy was done due to non-compliance to alignment requirements
            */
           TW_VOID                 *real_data;
           TW_UINT32               real_length;
   
           TW_UINT32               state;  /* request state */
           TW_UINT32               flags;  /* request flags */
   
           /* error encountered before request submission to CL */
           TW_UINT32               error_code;
   
           /* ptr to orig req for use during callback */
           TW_VOID                 *orig_req;
   
           struct tw_cl_link       link;   /* to link this request in a list */
           bus_dmamap_t            dma_map;/* DMA map for data */
           struct tw_cl_req_packet req_pkt;/* req pkt understood by CL */
   };
   
   
   /* Per-controller structure. */
   struct twa_softc {
           struct tw_cl_ctlr_handle        ctlr_handle;
           struct tw_osli_req_context      *req_ctx_buf;
   
           /* Controller state. */
           TW_UINT8                open;
           TW_UINT32               flags;
   
           TW_INT32                device_id;
           TW_UINT32               alignment;
           TW_UINT32               sg_size_factor;
   
           TW_VOID                 *non_dma_mem;
           TW_VOID                 *dma_mem;
           TW_UINT64               dma_mem_phys;
   
           /* Request queues and arrays. */
           struct tw_cl_link       req_q_head[TW_OSLI_Q_COUNT];
   
           struct task             deferred_intr_callback;/* taskqueue function */
           struct mtx              io_lock_handle;/* general purpose lock */
           struct mtx              *io_lock;/* ptr to general purpose lock */
           struct mtx              q_lock_handle;  /* queue manipulation lock */
           struct mtx              *q_lock;/* ptr to queue manipulation lock */
           struct mtx              sim_lock_handle;/* sim lock shared with cam */
           struct mtx              *sim_lock;/* ptr to sim lock */
   
           struct callout          watchdog_callout[2]; /* For command timeout */
           TW_UINT32               watchdog_index;
   
   #ifdef TW_OSL_DEBUG
           struct tw_osli_q_stats  q_stats[TW_OSLI_Q_COUNT];/* queue statistics */
   #endif /* TW_OSL_DEBUG */
       
           device_t                bus_dev;        /* bus device */
           struct cdev             *ctrl_dev;      /* control device */
           struct resource         *reg_res;       /* register interface window */
           TW_INT32                reg_res_id;     /* register resource id */
           bus_space_handle_t      bus_handle;     /* bus space handle */
           bus_space_tag_t         bus_tag;        /* bus space tag */
           bus_dma_tag_t           parent_tag;     /* parent DMA tag */
           bus_dma_tag_t           cmd_tag; /* DMA tag for CL's DMA'able mem */
           bus_dma_tag_t           dma_tag; /* data buffer DMA tag */
           bus_dma_tag_t           ioctl_tag; /* ioctl data buffer DMA tag */
           bus_dmamap_t            cmd_map; /* DMA map for CL's DMA'able mem */
           bus_dmamap_t            ioctl_map; /* DMA map for ioctl data buffers */
           struct resource         *irq_res;       /* interrupt resource */
           TW_INT32                irq_res_id;     /* register resource id */
           TW_VOID                 *intr_handle;   /* interrupt handle */
   
           struct sysctl_ctx_list  sysctl_ctxt;    /* sysctl context */
           struct sysctl_oid       *sysctl_tree;   /* sysctl oid */
   
           struct cam_sim          *sim;   /* sim for this controller */
           struct cam_path         *path;  /* peripheral, path, tgt, lun
                                           associated with this controller */
   };
   
   
   
   /*
    * Queue primitives.
    */
   
   #ifdef TW_OSL_DEBUG
   
   #define TW_OSLI_Q_INIT(sc, q_type)      do {                            \
           (sc)->q_stats[q_type].cur_len = 0;                              \
           (sc)->q_stats[q_type].max_len = 0;                              \
   } while(0)
   
   
   #define TW_OSLI_Q_INSERT(sc, q_type)    do {                            \
           struct tw_osli_q_stats *q_stats = &((sc)->q_stats[q_type]);     \
                                                                           \
           if (++(q_stats->cur_len) > q_stats->max_len)                    \
                   q_stats->max_len = q_stats->cur_len;                    \
   } while(0)
   
   
   #define TW_OSLI_Q_REMOVE(sc, q_type)                                    \
           (sc)->q_stats[q_type].cur_len--
   
   
   #else /* TW_OSL_DEBUG */
   
   #define TW_OSLI_Q_INIT(sc, q_index)
   #define TW_OSLI_Q_INSERT(sc, q_index)
   #define TW_OSLI_Q_REMOVE(sc, q_index)
   
   #endif /* TW_OSL_DEBUG */
   
   
   
   /* Initialize a queue of requests. */
   static __inline TW_VOID
   tw_osli_req_q_init(struct twa_softc *sc, TW_UINT8 q_type)
   {
           TW_CL_Q_INIT(&(sc->req_q_head[q_type]));
           TW_OSLI_Q_INIT(sc, q_type);
   }
   
   
   
   /* Insert the given request at the head of the given queue (q_type). */
   static __inline TW_VOID
   tw_osli_req_q_insert_head(struct tw_osli_req_context *req, TW_UINT8 q_type)
   {
           mtx_lock_spin(req->ctlr->q_lock);
           TW_CL_Q_INSERT_HEAD(&(req->ctlr->req_q_head[q_type]), &(req->link));
           TW_OSLI_Q_INSERT(req->ctlr, q_type);
           mtx_unlock_spin(req->ctlr->q_lock);
   }
   
   
   
   /* Insert the given request at the tail of the given queue (q_type). */
   static __inline TW_VOID
   tw_osli_req_q_insert_tail(struct tw_osli_req_context *req, TW_UINT8 q_type)
   {
           mtx_lock_spin(req->ctlr->q_lock);
           TW_CL_Q_INSERT_TAIL(&(req->ctlr->req_q_head[q_type]), &(req->link));
           TW_OSLI_Q_INSERT(req->ctlr, q_type);
           mtx_unlock_spin(req->ctlr->q_lock);
   }
   
   
   
   /* Remove and return the request at the head of the given queue (q_type). */
   static __inline struct tw_osli_req_context *
   tw_osli_req_q_remove_head(struct twa_softc *sc, TW_UINT8 q_type)
   {
           struct tw_osli_req_context      *req = NULL;
           struct tw_cl_link               *link;
   
           mtx_lock_spin(sc->q_lock);
           if ((link = TW_CL_Q_FIRST_ITEM(&(sc->req_q_head[q_type]))) !=
                   TW_CL_NULL) {
                   req = TW_CL_STRUCT_HEAD(link,
                           struct tw_osli_req_context, link);
                   TW_CL_Q_REMOVE_ITEM(&(sc->req_q_head[q_type]), &(req->link));
                   TW_OSLI_Q_REMOVE(sc, q_type);
           }
           mtx_unlock_spin(sc->q_lock);
           return(req);
   }
   
   
   
   /* Remove the given request from the given queue (q_type). */
   static __inline TW_VOID
   tw_osli_req_q_remove_item(struct tw_osli_req_context *req, TW_UINT8 q_type)
   {
           mtx_lock_spin(req->ctlr->q_lock);
           TW_CL_Q_REMOVE_ITEM(&(req->ctlr->req_q_head[q_type]), &(req->link));
           TW_OSLI_Q_REMOVE(req->ctlr, q_type);
           mtx_unlock_spin(req->ctlr->q_lock);
   }
   
   
   
   #ifdef TW_OSL_DEBUG
   
   extern TW_INT32 TW_DEBUG_LEVEL_FOR_OSL;
   
   #define tw_osli_dbg_dprintf(dbg_level, sc, fmt, args...)                \
           if (dbg_level <= TW_DEBUG_LEVEL_FOR_OSL)                        \
                   device_printf(sc->bus_dev, "%s: " fmt "\n",             \
                           __func__, ##args)
   
   
   #define tw_osli_dbg_printf(dbg_level, fmt, args...)                     \
           if (dbg_level <= TW_DEBUG_LEVEL_FOR_OSL)                        \
                   printf("%s: " fmt "\n", __func__, ##args)
   
   #else /* TW_OSL_DEBUG */
   
   #define tw_osli_dbg_dprintf(dbg_level, sc, fmt, args...)
   #define tw_osli_dbg_printf(dbg_level, fmt, args...)
   
   #endif /* TW_OSL_DEBUG */
   
   
   /* For regular printing. */
   #define twa_printf(sc, fmt, args...)                                    \
           device_printf(((struct twa_softc *)(sc))->bus_dev, fmt, ##args)
   
   /* For printing in the "consistent error reporting" format. */
   #define tw_osli_printf(sc, err_specific_desc, args...)                  \
           device_printf((sc)->bus_dev,                                    \
                   "%s: (0x%02X: 0x%04X): %s: " err_specific_desc "\n", ##args)
   
   
   
   #endif /* TW_OSL_H */

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