Subversion Repositories sata_controller_core

/*

 * sata_drv.h

 *

 * Definitions for the SATA device driver

 *

 * Author: Bin Huang  <bin.arthur@gmail.com>

 *

 * 2012 (c) Reconfigurable Computing System Lab at University of North

 * Carolina at Charlotte. This file is licensed under

 * the terms of the GNU General Public License version 2. This program

 * is licensed "as is" without any warranty of any kind, whether express

 * or implied. The code originally comes from the book "Linux Device

 * Drivers" by Alessandro Rubini and Jonathan Corbet, published

 * by O'Reilly & Associates.

 */

#include <linux/ioctl.h>

#include "sata_cfg.h"

#define DRIVER_NAME "sata"

/*

 * Minor number and partition management.

 */

#define SATA_MINORS     16

#define MINOR_SHIFT     4

#define DEVNUM(kdevnum) (MINOR(kdev_t_to_nr(kdevnum)) >> MINOR_SHIFT

/*

 * The internal representation of our device.

 */

struct sata_dev {

        unsigned long long size;        /* Device size in sectors */

        short users;                    /* How many users */

        short media_change;             /* Flag a media change? */

        spinlock_t lock;                /* For mutual exclusion */

        struct request_queue *queue;    /* The device request queue */

        struct gendisk *gd;             /* The gendisk structure */

        SATA_core_t *scp;               /* SATA Core Slave Registers */

};

#define HARDSECT_SIZE           512

/*

 * N_SECTORS:

 * 409600 -> 200MB

 * 819200 -> 400MB

 */

#define N_SECTORS               2097152 //1024MB

/*

 * We can tweak our hardware sector size, but the kernel talks to us

 * in terms of small sectors, always.

 */

#define KERNEL_SECTOR_SIZE      512

#define SECTOR_SHIFT            9