source: mainline/uspace/srv/bd/ata_bd/ata_bd.h@ 96cbd18

/*
 * Copyright (c) 2009 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/** @addtogroup bd
 * @{
 */
/** @file ATA driver definitions.
 */

#ifndef __ATA_BD_H__
#define __ATA_BD_H__

#include <bd_srv.h>
#include <sys/types.h>
#include <fibril_synch.h>
#include <str.h>

/** Base addresses for ATA I/O blocks. */
typedef struct {
        uintptr_t cmd;  /**< Command block base address. */
        uintptr_t ctl;  /**< Control block base address. */
} ata_base_t;

/** Timeout definitions. Unit is 10 ms. */
enum ata_timeout {
        TIMEOUT_PROBE   =  100, /*  1 s */
        TIMEOUT_BSY     =  100, /*  1 s */
        TIMEOUT_DRDY    = 1000  /* 10 s */
};

enum ata_dev_type {
        ata_reg_dev,    /* Register device (no packet feature set support) */
        ata_pkt_dev     /* Packet device (supports packet feature set). */
};

/** Register device block addressing mode. */
enum rd_addr_mode {
        am_chs,         /**< CHS block addressing */
        am_lba28,       /**< LBA-28 block addressing */
        am_lba48        /**< LBA-48 block addressing */
};

/** Block coordinates */
typedef struct {
        enum rd_addr_mode amode;

        union {
                /** CHS coordinates */
                struct {
                        uint8_t sector;
                        uint8_t cyl_lo;
                        uint8_t cyl_hi;
                };
                /** LBA coordinates */
                struct {
                        uint8_t c0;
                        uint8_t c1;
                        uint8_t c2;
                        uint8_t c3;
                        uint8_t c4;
                        uint8_t c5;
                };
        };

        /** Lower 4 bits for device/head register */
        uint8_t h;
} block_coord_t;

/** ATA device state structure. */
typedef struct {
        bool present;
        struct ata_ctrl *ctrl;

        /** Device type */
        enum ata_dev_type dev_type;

        /** Addressing mode to use (if register device) */
        enum rd_addr_mode amode;

        /*
         * Geometry. Only valid if operating in CHS mode.
         */
        struct {
                unsigned heads;
                unsigned cylinders;
                unsigned sectors;
        } geom;

        uint64_t blocks;
        size_t block_size;

        char model[STR_BOUNDS(40) + 1];

        fibril_mutex_t lock;
        service_id_t service_id;
        int disk_id;
        bd_srvs_t bds;
} disk_t;

/** ATA controller */
typedef struct ata_ctrl {
        /** I/O base address of the command registers */
        uintptr_t cmd_physical;
        /** I/O base address of the control registers */
        uintptr_t ctl_physical;

        /** Command registers */
        ata_cmd_t *cmd;
        /** Control registers */
        ata_ctl_t *ctl;

        /** Per-disk state. */
        disk_t disk[MAX_DISKS];
} ata_ctrl_t;

#endif

/** @}
 */