linux-imx

/**

 * IBM Accelerator Family 'GenWQE'

 *

 * (C) Copyright IBM Corp. 2013

 *

 * Author: Frank Haverkamp <haver@linux.vnet.ibm.com>

 * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>

 * Author: Michael Jung <mijung@gmx.net>

 * Author: Michael Ruettger <michael@ibmra.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License (version 2 only)

 * as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 */

​

/*

 * Miscelanous functionality used in the other GenWQE driver parts.

 */

​

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/vmalloc.h>

#include <linux/page-flags.h>

#include <linux/scatterlist.h>

#include <linux/hugetlb.h>

#include <linux/iommu.h>

#include <linux/pci.h>

#include <linux/dma-mapping.h>

#include <linux/ctype.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/delay.h>

#include <asm/pgtable.h>

​

#include "genwqe_driver.h"

#include "card_base.h"

#include "card_ddcb.h"

​

/**

 * __genwqe_writeq() - Write 64-bit register

 * @cd:         genwqe device descriptor

 * @byte_offs:  byte offset within BAR

 * @val:        64-bit value

 *

 * Return: 0 if success; < 0 if error

 */

int __genwqe_writeq(struct genwqe_dev *cd, u64 byte_offs, u64 val)

{

    struct pci_dev *pci_dev = cd->pci_dev;

​

    if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)

        return -EIO;

​

    if (cd->mmio == NULL)

        return -EIO;

​

    if (pci_channel_offline(pci_dev))

        return -EIO;