drivers/pci/hotplug/shpchp_sysfs.c

   1 /*
   2  * Compaq Hot Plug Controller Driver
   3  *
   4  * Copyright (c) 1995,2001 Compaq Computer Corporation
   5  * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
   6  * Copyright (c) 2001 IBM Corp.
   7  *
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or (at
  13  * your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18  * NON INFRINGEMENT.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Send feedback to <greg@kroah.com>
  26  *
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/types.h>
  32 #include <linux/pci.h>
  33 #include "shpchp.h"
  34
  35
  36 /* A few routines that create sysfs entries for the hot plug controller */
  37
  38 static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, char *buf)
  39 {
  40         struct pci_dev *pdev;
  41         char * out = buf;
  42         int index, busnr;
  43         struct resource *res;
  44         struct pci_bus *bus;
  45
  46         pdev = container_of (dev, struct pci_dev, dev);
  47         bus = pdev->subordinate;
  48
  49         out += sprintf(buf, "Free resources: memory\n");
  50         pci_bus_for_each_resource(bus, res, index) {
  51                 if (res && (res->flags & IORESOURCE_MEM) &&
  52                                 !(res->flags & IORESOURCE_PREFETCH)) {
  53                         out += sprintf(out, "start = %8.8llx, "
  54                                         "length = %8.8llx\n",
  55                                         (unsigned long long)res->start,
  56                                         (unsigned long long)(res->end - res->start));
  57                 }
  58         }
  59         out += sprintf(out, "Free resources: prefetchable memory\n");
  60         pci_bus_for_each_resource(bus, res, index) {
  61                 if (res && (res->flags & IORESOURCE_MEM) &&
  62                                (res->flags & IORESOURCE_PREFETCH)) {
  63                         out += sprintf(out, "start = %8.8llx, "
  64                                         "length = %8.8llx\n",
  65                                         (unsigned long long)res->start,
  66                                         (unsigned long long)(res->end - res->start));
  67                 }
  68         }
  69         out += sprintf(out, "Free resources: IO\n");
  70         pci_bus_for_each_resource(bus, res, index) {
  71                 if (res && (res->flags & IORESOURCE_IO)) {
  72                         out += sprintf(out, "start = %8.8llx, "
  73                                         "length = %8.8llx\n",
  74                                         (unsigned long long)res->start,
  75                                         (unsigned long long)(res->end - res->start));
  76                 }
  77         }
  78         out += sprintf(out, "Free resources: bus numbers\n");
  79         for (busnr = bus->secondary; busnr <= bus->subordinate; busnr++) {
  80                 if (!pci_find_bus(pci_domain_nr(bus), busnr))
  81                         break;
  82         }
  83         if (busnr < bus->subordinate)
  84                 out += sprintf(out, "start = %8.8x, length = %8.8x\n",
  85                                 busnr, (bus->subordinate - busnr));
  86
  87         return out - buf;
  88 }
  89 static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
  90
  91 int __must_check shpchp_create_ctrl_files (struct controller *ctrl)
  92 {
  93         return device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
  94 }
  95
  96 void shpchp_remove_ctrl_files(struct controller *ctrl)
  97 {
  98         device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
  99 }