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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | /* * RPA Virtual I/O device functions * Copyright (C) 2004 Linda Xie <lxie@us.ibm.com> * * 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 <lxie@us.ibm.com> * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/kobject.h> #include <linux/sysfs.h> #include <linux/pci.h> #include <linux/string.h> #include <linux/slab.h> #include <asm/rtas.h> #include "rpaphp.h" static ssize_t location_read_file (struct hotplug_slot *php_slot, char *buf) { char *value; int retval = -ENOENT; struct slot *slot = (struct slot *)php_slot->private; if (!slot) return retval; value = slot->location; retval = sprintf (buf, "%s\n", value); return retval; } static struct hotplug_slot_attribute php_attr_location = { .attr = {.name = "phy_location", .mode = S_IFREG | S_IRUGO}, .show = location_read_file, }; /* free up the memory used by a slot */ static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot) { struct slot *slot = (struct slot *) hotplug_slot->private; dealloc_slot_struct(slot); } void dealloc_slot_struct(struct slot *slot) { kfree(slot->hotplug_slot->info); kfree(slot->hotplug_slot->name); kfree(slot->hotplug_slot); kfree(slot->location); kfree(slot); } struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, int power_domain) { struct slot *slot; slot = kzalloc(sizeof(struct slot), GFP_KERNEL); if (!slot) goto error_nomem; slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); if (!slot->hotplug_slot) goto error_slot; slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); if (!slot->hotplug_slot->info) goto error_hpslot; slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL); if (!slot->hotplug_slot->name) goto error_info; slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL); if (!slot->location) goto error_name; slot->name = slot->hotplug_slot->name; slot->dn = dn; slot->index = drc_index; strcpy(slot->location, drc_name); slot->power_domain = power_domain; slot->hotplug_slot->private = slot; slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops; slot->hotplug_slot->release = &rpaphp_release_slot; return (slot); error_name: kfree(slot->hotplug_slot->name); error_info: kfree(slot->hotplug_slot->info); error_hpslot: kfree(slot->hotplug_slot); error_slot: kfree(slot); error_nomem: return NULL; } static int is_registered(struct slot *slot) { struct slot *tmp_slot; list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) { if (!strcmp(tmp_slot->name, slot->name)) return 1; } return 0; } int rpaphp_deregister_slot(struct slot *slot) { int retval = 0; struct hotplug_slot *php_slot = slot->hotplug_slot; dbg("%s - Entry: deregistering slot=%s\n", __FUNCTION__, slot->name); list_del(&slot->rpaphp_slot_list); /* remove "phy_location" file */ sysfs_remove_file(&php_slot->kobj, &php_attr_location.attr); retval = pci_hp_deregister(php_slot); if (retval) err("Problem unregistering a slot %s\n", slot->name); dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval); return retval; } EXPORT_SYMBOL_GPL(rpaphp_deregister_slot); int rpaphp_register_slot(struct slot *slot) { struct hotplug_slot *php_slot = slot->hotplug_slot; int retval; dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n", __FUNCTION__, slot->dn->full_name, slot->index, slot->name, slot->power_domain, slot->type); /* should not try to register the same slot twice */ if (is_registered(slot)) { err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name); return -EAGAIN; } retval = pci_hp_register(php_slot); if (retval) { err("pci_hp_register failed with error %d\n", retval); return retval; } /* create "phy_location" file */ retval = sysfs_create_file(&php_slot->kobj, &php_attr_location.attr); if (retval) { err("sysfs_create_file failed with error %d\n", retval); goto sysfs_fail; } /* add slot to our internal list */ list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head); info("Slot [%s](PCI location=%s) registered\n", slot->name, slot->location); return 0; sysfs_fail: pci_hp_deregister(php_slot); return retval; } |