linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * linux/drivers/char/hpilo.h

 *

 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.

 *  David Altobelli <david.altobelli@hp.com>

 */

#ifndef __HPILO_H

#define __HPILO_H

​

#define ILO_NAME "hpilo"

​

/* max number of open channel control blocks per device, hw limited to 32 */

#define MAX_CCB        24

/* min number of open channel control blocks per device, hw limited to 32 */

#define MIN_CCB     8

/* max number of supported devices */

#define MAX_ILO_DEV 1

/* max number of files */

#define MAX_OPEN    (MAX_CCB * MAX_ILO_DEV)

/* total wait time in usec */

#define MAX_WAIT_TIME   10000

/* per spin wait time in usec */

#define WAIT_TIME   10

/* spin counter for open/close delay */

#define MAX_WAIT    (MAX_WAIT_TIME / WAIT_TIME)

​

/*

 * Per device, used to track global memory allocations.

 */

struct ilo_hwinfo {

    /* mmio registers on device */

    char __iomem *mmio_vaddr;

​

    /* doorbell registers on device */

    char __iomem *db_vaddr;

​

    /* shared memory on device used for channel control blocks */

    char __iomem *ram_vaddr;

​

    /* files corresponding to this device */

    struct ccb_data *ccb_alloc[MAX_CCB];

​

    struct pci_dev *ilo_dev;

​

    /*

     * open_lock      serializes ccb_cnt during open and close

     * [ irq disabled ]

     * -> alloc_lock  used when adding/removing/searching ccb_alloc,

     *                which represents all ccbs open on the device

     * --> fifo_lock  controls access to fifo queues shared with hw

     *

     * Locks must be taken in this order, but open_lock and alloc_lock

     * are optional, they do not need to be held in order to take a

     * lower level lock.

     */

    spinlock_t open_lock;

    spinlock_t alloc_lock;

    spinlock_t fifo_lock;

​

    struct cdev cdev;

};

​