The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ida/idavar.h

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    1 /*-
    2  * Copyright (c) 1999,2000 Jonathan Lemon
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/8.3/sys/dev/ida/idavar.h 144991 2005-04-13 05:06:57Z mdodd $
   27  */
   28 
   29 /*
   30  * software structures for the Compaq RAID controller
   31  */
   32 
   33 #ifndef _IDAVAR_H
   34 #define _IDAVAR_H
   35 
   36 #define ida_inb(ida, port) \
   37         bus_space_read_1((ida)->tag, (ida)->bsh, port)
   38 #define ida_inw(ida, port) \
   39         bus_space_read_2((ida)->tag, (ida)->bsh, port)
   40 #define ida_inl(ida, port) \
   41         bus_space_read_4((ida)->tag, (ida)->bsh, port)
   42 
   43 #define ida_outb(ida, port, val) \
   44         bus_space_write_1((ida)->tag, (ida)->bsh, port, val)
   45 #define ida_outw(ida, port, val) \
   46         bus_space_write_2((ida)->tag, (ida)->bsh, port, val)
   47 #define ida_outl(ida, port, val) \
   48         bus_space_write_4((ida)->tag, (ida)->bsh, port, val)
   49 
   50 struct ida_hdr {
   51         u_int8_t        drive;          /* logical drive */
   52         u_int8_t        priority;       /* block priority */
   53         u_int16_t       size;           /* size of request, in words */
   54 };
   55 
   56 struct ida_req {
   57         u_int16_t       next;           /* offset of next request */
   58         u_int8_t        command;        /* command */
   59         u_int8_t        error;          /* return error code */
   60         u_int32_t       blkno;          /* block number */
   61         u_int16_t       bcount;         /* block count */
   62         u_int8_t        sgcount;        /* number of scatter/gather entries */
   63         u_int8_t        spare;          /* reserved */
   64 };
   65 
   66 struct ida_sgb {
   67         u_int32_t       length;         /* length of S/G segment */
   68         u_int32_t       addr;           /* physical address of block */
   69 };
   70 
   71 #define IDA_NSEG        32              /* maximum number of segments */
   72 
   73 /*
   74  * right now, this structure totals 276 bytes.
   75  */
   76 struct ida_hardware_qcb {
   77         struct  ida_hdr hdr;                    /*   4 */
   78         struct  ida_req req;                    /*  12 */
   79         struct  ida_sgb seg[IDA_NSEG];          /* 256 */
   80         struct  ida_qcb *qcb;                   /*   4 - qcb backpointer */
   81 };
   82 
   83 typedef enum {
   84         QCB_FREE                = 0x0000,
   85         QCB_ACTIVE              = 0x0001,       /* waiting for completion */
   86 } qcb_state;
   87 
   88 #define DMA_DATA_IN     0x0001
   89 #define DMA_DATA_OUT    0x0002
   90 #define IDA_COMMAND     0x0004
   91 #define DMA_DATA_TRANSFER       (DMA_DATA_IN | DMA_DATA_OUT)
   92 
   93 #define IDA_QCB_MAX     256
   94 #define IDA_CONTROLLER  0               /* drive "number" for controller */
   95 
   96 struct ida_qcb {
   97         struct          ida_hardware_qcb *hwqcb;
   98         qcb_state       state;
   99         short           flags;
  100         union {
  101                 STAILQ_ENTRY(ida_qcb) stqe;
  102                 SLIST_ENTRY(ida_qcb) sle;
  103         } link;
  104         bus_dmamap_t    dmamap;
  105         bus_addr_t      hwqcb_busaddr;
  106         struct          bio *buf;               /* bio associated with qcb */
  107 };
  108 
  109 struct ida_softc;
  110 
  111 struct ida_access {
  112         int             (*fifo_full)(struct ida_softc *);
  113         void            (*submit)(struct ida_softc *, struct ida_qcb *);
  114         bus_addr_t      (*done)(struct ida_softc *);
  115         int             (*int_pending)(struct ida_softc *);
  116         void            (*int_enable)(struct ida_softc *, int);
  117 };
  118 
  119 /*
  120  * flags for the controller
  121  */
  122 #define IDA_ATTACHED    0x01            /* attached */
  123 #define IDA_FIRMWARE    0x02            /* firmware must be started */
  124 #define IDA_INTERRUPTS  0x04            /* interrupts enabled */
  125 
  126 struct ida_softc {
  127         device_t        dev;
  128         int             unit;
  129 
  130         struct callout  ch;
  131         struct cdev *ida_dev_t;
  132 
  133         int             regs_res_type;
  134         int             regs_res_id;
  135         struct          resource *regs;
  136 
  137         int             irq_res_type;
  138         struct          resource *irq;
  139         void            *ih;
  140 
  141         bus_space_tag_t         tag;
  142         bus_space_handle_t      bsh;
  143 
  144         /* various DMA tags */
  145         bus_dma_tag_t   parent_dmat;
  146         bus_dma_tag_t   buffer_dmat;
  147 
  148         bus_dma_tag_t   hwqcb_dmat;
  149         bus_dmamap_t    hwqcb_dmamap;
  150         bus_addr_t      hwqcb_busaddr;
  151 
  152         bus_dma_tag_t   sg_dmat;
  153 
  154         int             num_drives;
  155         int             num_qcbs;
  156         int             flags;
  157 
  158         int             qactive;
  159 
  160         struct          ida_hardware_qcb *hwqcbs;       /* HW QCB array */
  161         struct          ida_qcb *qcbs;                  /* kernel QCB array */
  162         SLIST_HEAD(, ida_qcb)   free_qcbs;      
  163         STAILQ_HEAD(, ida_qcb)  qcb_queue;
  164         struct          bio_queue_head bio_queue;
  165 
  166         struct          ida_access cmd;
  167 };
  168 
  169 /*
  170  * drive flags
  171  */
  172 #define DRV_WRITEPROT           0x0001
  173 
  174 struct idad_softc {
  175         device_t        dev;
  176         struct          ida_softc *controller;
  177         struct          disk *disk;
  178         int             drive;                  /* per controller */
  179         int             unit;                   /* global */
  180         int             cylinders;
  181         int             heads;
  182         int             sectors;
  183         int             secsize;
  184         int             secperunit;
  185         int             flags;
  186 };
  187 
  188 struct ida_board {
  189         u_int32_t       board;
  190         char            *desc;
  191         struct          ida_access *accessor;
  192         int             flags;
  193 };
  194 
  195 extern int ida_detach(device_t dev);
  196 extern struct ida_softc *ida_alloc(device_t dev, struct resource *regs,
  197         int regs_type, int regs_id, bus_dma_tag_t parent_dmat);
  198 extern void ida_free(struct ida_softc *ida);
  199 extern int ida_init(struct ida_softc *ida);
  200 extern void ida_attach(struct ida_softc *ida);
  201 extern int ida_command(struct ida_softc *ida, int command, void *data,
  202         int datasize, int drive, u_int32_t pblkno, int flags);
  203 extern void ida_submit_buf(struct ida_softc *ida, struct bio *bp);
  204 extern void ida_intr(void *data);
  205 
  206 extern void idad_intr(struct bio *bp);
  207 
  208 #endif /* _IDAVAR_H */

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