shpchp_sysfs.c

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/*
 * Compaq Hot Plug Controller Driver
 *
 * Copyright (c) 1995,2001 Compaq Computer Corporation
 * Copyright (c) 2001,2003 Greg Kroah-Hartman ([email protected])
 * Copyright (c) 2001 IBM Corp.
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * 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, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <[email protected]>
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "shpchp.h"


/* A few routines that create sysfs entries for the hot plug controller */

static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, char *buf)
{
    struct pci_dev *pdev;
    char * out = buf;
    int index, busnr;
    struct resource *res;
    struct pci_bus *bus;

    pdev = container_of (dev, struct pci_dev, dev);
    bus = pdev->subordinate;

    out += sprintf(buf, "Free resources: memory\n");
    pci_bus_for_each_resource(bus, res, index) {
        if (res && (res->flags & IORESOURCE_MEM) &&
                !(res->flags & IORESOURCE_PREFETCH)) {
            out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
                       (unsigned long long)res->start,
                       (unsigned long long)resource_size(res));
        }
    }
    out += sprintf(out, "Free resources: prefetchable memory\n");
    pci_bus_for_each_resource(bus, res, index) {
        if (res && (res->flags & IORESOURCE_MEM) &&
                   (res->flags & IORESOURCE_PREFETCH)) {
            out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
                       (unsigned long long)res->start,
                       (unsigned long long)resource_size(res));
        }
    }
    out += sprintf(out, "Free resources: IO\n");
    pci_bus_for_each_resource(bus, res, index) {
        if (res && (res->flags & IORESOURCE_IO)) {
            out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
                       (unsigned long long)res->start,
                       (unsigned long long)resource_size(res));
        }
    }
    out += sprintf(out, "Free resources: bus numbers\n");
    for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
        if (!pci_find_bus(pci_domain_nr(bus), busnr))
            break;
    }
    if (busnr < bus->busn_res.end)
        out += sprintf(out, "start = %8.8x, length = %8.8x\n",
                busnr, (int)(bus->busn_res.end - busnr));

    return out - buf;
}
static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);

int __must_check shpchp_create_ctrl_files (struct controller *ctrl)
{
    return device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
}

void shpchp_remove_ctrl_files(struct controller *ctrl)
{
    device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
}