linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * PCI VPD support

 *

 * Copyright (C) 2010 Broadcom Corporation.

 */

​

#include <linux/pci.h>

#include <linux/delay.h>

#include <linux/export.h>

#include <linux/sched/signal.h>

#include "pci.h"

​

/* VPD access through PCI 2.2+ VPD capability */

​

struct pci_vpd_ops {

    ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);

    ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);

    int (*set_size)(struct pci_dev *dev, size_t len);

};

​

struct pci_vpd {

    const struct pci_vpd_ops *ops;

    struct bin_attribute *attr; /* Descriptor for sysfs VPD entry */

    struct mutex    lock;

    unsigned int    len;

    u16     flag;

    u8      cap;

    unsigned int    busy:1;

    unsigned int    valid:1;

};

​

/**

 * pci_read_vpd - Read one entry from Vital Product Data

 * @dev:    pci device struct

 * @pos:    offset in vpd space

 * @count:  number of bytes to read

 * @buf:    pointer to where to store result

 */

ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf)

{

    if (!dev->vpd || !dev->vpd->ops)

        return -ENODEV;

    return dev->vpd->ops->read(dev, pos, count, buf);

}

EXPORT_SYMBOL(pci_read_vpd);

​

/**

 * pci_write_vpd - Write entry to Vital Product Data

 * @dev:    pci device struct

 * @pos:    offset in vpd space

 * @count:  number of bytes to write

 * @buf:    buffer containing write data

 */

ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf)

{

    if (!dev->vpd || !dev->vpd->ops)

        return -ENODEV;

    return dev->vpd->ops->write(dev, pos, count, buf);

}

EXPORT_SYMBOL(pci_write_vpd);

​

/**