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         for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
  51                 res = bus->resource[index];
  52                 if (res && (res->flags & IORESOURCE_MEM) &&
  53                                 !(res->flags & IORESOURCE_PREFETCH)) {
  54                         out += sprintf(out, "start = %8.8llx, "
  55                                         "length = %8.8llx\n",
  56                                         (unsigned long long)res->start,
  57                                         (unsigned long long)(res->end - res->start));
  58                 }
  59         }
  60         out += sprintf(out, "Free resources: prefetchable memory\n");
  61         for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
  62                 res = bus->resource[index];
  63                 if (res && (res->flags & IORESOURCE_MEM) &&
  64                                (res->flags & IORESOURCE_PREFETCH)) {
  65                         out += sprintf(out, "start = %8.8llx, "
  66                                         "length = %8.8llx\n",
  67                                         (unsigned long long)res->start,
  68                                         (unsigned long long)(res->end - res->start));
  69                 }
  70         }
  71         out += sprintf(out, "Free resources: IO\n");
  72         for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
  73                 res = bus->resource[index];
  74                 if (res && (res->flags & IORESOURCE_IO)) {
  75                         out += sprintf(out, "start = %8.8llx, "
  76                                         "length = %8.8llx\n",
  77                                         (unsigned long long)res->start,
  78                                         (unsigned long long)(res->end - res->start));
  79                 }
  80         }
  81         out += sprintf(out, "Free resources: bus numbers\n");
  82         for (busnr = bus->secondary; busnr <= bus->subordinate; busnr++) {
  83                 if (!pci_find_bus(pci_domain_nr(bus), busnr))
  84                         break;
  85         }
  86         if (busnr < bus->subordinate)
  87                 out += sprintf(out, "start = %8.8x, length = %8.8x\n",
  88                                 busnr, (bus->subordinate - busnr));
  89
  90         return out - buf;
  91 }
  92 static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
  93
  94 int __must_check shpchp_create_ctrl_files (struct controller *ctrl)
  95 {
  96         return device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
  97 }
  98
  99 void shpchp_remove_ctrl_files(struct controller *ctrl)
 100 {
 101         device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
 102 }