Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform. |
| 3 | * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com> |
| 4 | * |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or (at |
| 10 | * your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 15 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 16 | * details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | * |
| 22 | * Send feedback to <lxie@us.ibm.com> |
| 23 | * |
| 24 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/kernel.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/moduleparam.h> |
| 28 | #include <linux/pci.h> |
Greg Kroah-Hartman | 7a54f25 | 2006-10-13 20:05:19 -0700 | [diff] [blame] | 29 | #include <linux/pci_hotplug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/init.h> |
Benjamin Herrenschmidt | b4a26be | 2010-04-06 15:03:40 +0000 | [diff] [blame] | 32 | #include <linux/vmalloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/eeh.h> /* for eeh_add_device() */ |
| 34 | #include <asm/rtas.h> /* rtas_call */ |
| 35 | #include <asm/pci-bridge.h> /* for pci_controller */ |
| 36 | #include "../pci.h" /* for pci_add_new_bus */ |
| 37 | /* and pci_do_scan_bus */ |
| 38 | #include "rpaphp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame^] | 40 | bool rpaphp_debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | LIST_HEAD(rpaphp_slot_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #define DRIVER_VERSION "0.1" |
| 44 | #define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>" |
| 45 | #define DRIVER_DESC "RPA HOT Plug PCI Controller Driver" |
| 46 | |
| 47 | #define MAX_LOC_CODE 128 |
| 48 | |
| 49 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 50 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | |
Kristen Carlson Accardi | 5d9bc1f | 2008-10-13 09:59:12 -0700 | [diff] [blame] | 53 | module_param_named(debug, rpaphp_debug, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /** |
| 56 | * set_attention_status - set attention LED |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 57 | * @hotplug_slot: target &hotplug_slot |
| 58 | * @value: LED control value |
| 59 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * echo 0 > attention -- set LED OFF |
| 61 | * echo 1 > attention -- set LED ON |
| 62 | * echo 2 > attention -- set LED ID(identify, light is blinking) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | */ |
| 64 | static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 65 | { |
Linas Vepstas | c02929c | 2007-04-13 15:34:18 -0700 | [diff] [blame] | 66 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | struct slot *slot = (struct slot *)hotplug_slot->private; |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | switch (value) { |
| 70 | case 0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | case 1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | case 2: |
Linas Vepstas | c02929c | 2007-04-13 15:34:18 -0700 | [diff] [blame] | 73 | break; |
| 74 | default: |
| 75 | value = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | break; |
| 77 | } |
Linas Vepstas | c02929c | 2007-04-13 15:34:18 -0700 | [diff] [blame] | 78 | |
| 79 | rc = rtas_set_indicator(DR_INDICATOR, slot->index, value); |
| 80 | if (!rc) |
| 81 | hotplug_slot->info->attention_status = value; |
| 82 | |
| 83 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | /** |
| 87 | * get_power_status - get power status of a slot |
| 88 | * @hotplug_slot: slot to get status |
| 89 | * @value: pointer to store status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | */ |
| 91 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 92 | { |
Linas Vepstas | 427310f | 2007-04-13 15:34:13 -0700 | [diff] [blame] | 93 | int retval, level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | struct slot *slot = (struct slot *)hotplug_slot->private; |
| 95 | |
Linas Vepstas | 427310f | 2007-04-13 15:34:13 -0700 | [diff] [blame] | 96 | retval = rtas_get_power_level (slot->power_domain, &level); |
| 97 | if (!retval) |
| 98 | *value = level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | return retval; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * get_attention_status - get attention LED status |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 104 | * @hotplug_slot: slot to get status |
| 105 | * @value: pointer to store status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | */ |
| 107 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 108 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | struct slot *slot = (struct slot *)hotplug_slot->private; |
Linas Vepstas | ebf42c0 | 2007-04-13 15:34:15 -0700 | [diff] [blame] | 110 | *value = slot->hotplug_slot->info->attention_status; |
| 111 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 115 | { |
| 116 | struct slot *slot = (struct slot *)hotplug_slot->private; |
Linas Vepstas | bf0af51 | 2007-04-13 15:34:14 -0700 | [diff] [blame] | 117 | int rc, state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Linas Vepstas | bf0af51 | 2007-04-13 15:34:14 -0700 | [diff] [blame] | 119 | rc = rpaphp_get_sensor_state(slot, &state); |
Linas Vepstas | bf0af51 | 2007-04-13 15:34:14 -0700 | [diff] [blame] | 120 | |
| 121 | *value = NOT_VALID; |
| 122 | if (rc) |
| 123 | return rc; |
| 124 | |
| 125 | if (state == EMPTY) |
| 126 | *value = EMPTY; |
| 127 | else if (state == PRESENT) |
| 128 | *value = slot->state; |
| 129 | |
| 130 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 133 | static enum pci_bus_speed get_max_bus_speed(struct slot *slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 135 | enum pci_bus_speed speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | switch (slot->type) { |
| 137 | case 1: |
| 138 | case 2: |
| 139 | case 3: |
| 140 | case 4: |
| 141 | case 5: |
| 142 | case 6: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 143 | speed = PCI_SPEED_33MHz; /* speed for case 1-6 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | break; |
| 145 | case 7: |
| 146 | case 8: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 147 | speed = PCI_SPEED_66MHz; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | break; |
| 149 | case 11: |
| 150 | case 14: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 151 | speed = PCI_SPEED_66MHz_PCIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | break; |
| 153 | case 12: |
| 154 | case 15: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 155 | speed = PCI_SPEED_100MHz_PCIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | break; |
| 157 | case 13: |
| 158 | case 16: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 159 | speed = PCI_SPEED_133MHz_PCIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | break; |
| 161 | default: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 162 | speed = PCI_SPEED_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 165 | |
| 166 | return speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 169 | static int get_children_props(struct device_node *dn, const int **drc_indexes, |
| 170 | const int **drc_names, const int **drc_types, |
| 171 | const int **drc_power_domains) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 173 | const int *indexes, *names, *types, *domains; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 175 | indexes = of_get_property(dn, "ibm,drc-indexes", NULL); |
| 176 | names = of_get_property(dn, "ibm,drc-names", NULL); |
| 177 | types = of_get_property(dn, "ibm,drc-types", NULL); |
| 178 | domains = of_get_property(dn, "ibm,drc-power-domains", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | if (!indexes || !names || !types || !domains) { |
| 181 | /* Slot does not have dynamically-removable children */ |
| 182 | return -EINVAL; |
| 183 | } |
| 184 | if (drc_indexes) |
| 185 | *drc_indexes = indexes; |
| 186 | if (drc_names) |
| 187 | /* &drc_names[1] contains NULL terminated slot names */ |
| 188 | *drc_names = names; |
| 189 | if (drc_types) |
| 190 | /* &drc_types[1] contains NULL terminated slot types */ |
| 191 | *drc_types = types; |
| 192 | if (drc_power_domains) |
| 193 | *drc_power_domains = domains; |
| 194 | |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | /* To get the DRC props describing the current node, first obtain it's |
| 199 | * my-drc-index property. Next obtain the DRC list from it's parent. Use |
| 200 | * the my-drc-index for correlation, and obtain the requested properties. |
| 201 | */ |
| 202 | int rpaphp_get_drc_props(struct device_node *dn, int *drc_index, |
| 203 | char **drc_name, char **drc_type, int *drc_power_domain) |
| 204 | { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 205 | const int *indexes, *names; |
| 206 | const int *types, *domains; |
| 207 | const unsigned int *my_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | char *name_tmp, *type_tmp; |
| 209 | int i, rc; |
| 210 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 211 | my_index = of_get_property(dn, "ibm,my-drc-index", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | if (!my_index) { |
| 213 | /* Node isn't DLPAR/hotplug capable */ |
| 214 | return -EINVAL; |
| 215 | } |
| 216 | |
| 217 | rc = get_children_props(dn->parent, &indexes, &names, &types, &domains); |
| 218 | if (rc < 0) { |
| 219 | return -EINVAL; |
| 220 | } |
| 221 | |
| 222 | name_tmp = (char *) &names[1]; |
| 223 | type_tmp = (char *) &types[1]; |
| 224 | |
| 225 | /* Iterate through parent properties, looking for my-drc-index */ |
| 226 | for (i = 0; i < indexes[0]; i++) { |
| 227 | if ((unsigned int) indexes[i + 1] == *my_index) { |
| 228 | if (drc_name) |
| 229 | *drc_name = name_tmp; |
| 230 | if (drc_type) |
| 231 | *drc_type = type_tmp; |
| 232 | if (drc_index) |
| 233 | *drc_index = *my_index; |
| 234 | if (drc_power_domain) |
| 235 | *drc_power_domain = domains[i+1]; |
| 236 | return 0; |
| 237 | } |
| 238 | name_tmp += (strlen(name_tmp) + 1); |
| 239 | type_tmp += (strlen(type_tmp) + 1); |
| 240 | } |
| 241 | |
| 242 | return -EINVAL; |
| 243 | } |
| 244 | |
| 245 | static int is_php_type(char *drc_type) |
| 246 | { |
| 247 | unsigned long value; |
| 248 | char *endptr; |
| 249 | |
| 250 | /* PCI Hotplug nodes have an integer for drc_type */ |
| 251 | value = simple_strtoul(drc_type, &endptr, 10); |
| 252 | if (endptr == drc_type) |
| 253 | return 0; |
| 254 | |
| 255 | return 1; |
| 256 | } |
| 257 | |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 258 | /** |
| 259 | * is_php_dn() - return 1 if this is a hotpluggable pci slot, else 0 |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 260 | * @dn: target &device_node |
| 261 | * @indexes: passed to get_children_props() |
| 262 | * @names: passed to get_children_props() |
| 263 | * @types: returned from get_children_props() |
| 264 | * @power_domains: |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 265 | * |
| 266 | * This routine will return true only if the device node is |
| 267 | * a hotpluggable slot. This routine will return false |
| 268 | * for built-in pci slots (even when the built-in slots are |
| 269 | * dlparable.) |
| 270 | */ |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 271 | static int is_php_dn(struct device_node *dn, const int **indexes, |
| 272 | const int **names, const int **types, const int **power_domains) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 274 | const int *drc_types; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | int rc; |
| 276 | |
| 277 | rc = get_children_props(dn, indexes, names, &drc_types, power_domains); |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 278 | if (rc < 0) |
| 279 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 281 | if (!is_php_type((char *) &drc_types[1])) |
| 282 | return 0; |
| 283 | |
| 284 | *types = drc_types; |
| 285 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | } |
| 287 | |
linas@austin.ibm.com | f6afbad | 2006-01-12 18:31:01 -0600 | [diff] [blame] | 288 | /** |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 289 | * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem. |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 290 | * @dn: device node of slot |
linas@austin.ibm.com | f6afbad | 2006-01-12 18:31:01 -0600 | [diff] [blame] | 291 | * |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 292 | * This subroutine will register a hotplugable slot with the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 293 | * PCI hotplug infrastructure. This routine is typically called |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 294 | * during boot time, if the hotplug slots are present at boot time, |
| 295 | * or is called later, by the dlpar add code, if the slot is |
| 296 | * being dynamically added during runtime. |
| 297 | * |
| 298 | * If the device node points at an embedded (built-in) slot, this |
| 299 | * routine will just return without doing anything, since embedded |
| 300 | * slots cannot be hotplugged. |
| 301 | * |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 302 | * To remove a slot, it suffices to call rpaphp_deregister_slot(). |
linas@austin.ibm.com | f6afbad | 2006-01-12 18:31:01 -0600 | [diff] [blame] | 303 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | int rpaphp_add_slot(struct device_node *dn) |
| 305 | { |
| 306 | struct slot *slot; |
| 307 | int retval = 0; |
John Rose | 56d8456 | 2005-07-25 10:17:03 -0500 | [diff] [blame] | 308 | int i; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 309 | const int *indexes, *names, *types, *power_domains; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | char *name, *type; |
| 311 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 312 | if (!dn->name || strcmp(dn->name, "pci")) |
| 313 | return 0; |
| 314 | |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 315 | /* If this is not a hotplug slot, return without doing anything. */ |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 316 | if (!is_php_dn(dn, &indexes, &names, &types, &power_domains)) |
| 317 | return 0; |
| 318 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 319 | dbg("Entry %s: dn->full_name=%s\n", __func__, dn->full_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | /* register PCI devices */ |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 322 | name = (char *) &names[1]; |
| 323 | type = (char *) &types[1]; |
| 324 | for (i = 0; i < indexes[0]; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 326 | slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]); |
| 327 | if (!slot) |
| 328 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 330 | slot->type = simple_strtoul(type, NULL, 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 332 | dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n", |
| 333 | indexes[i + 1], name, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
Linas Vepstas | fea54b8 | 2007-04-13 15:34:20 -0700 | [diff] [blame] | 335 | retval = rpaphp_enable_slot(slot); |
Linas Vepstas | 6f79eb7 | 2007-04-13 15:34:19 -0700 | [diff] [blame] | 336 | if (!retval) |
| 337 | retval = rpaphp_register_slot(slot); |
| 338 | |
Linas Vepstas | 31be758 | 2007-04-13 15:34:09 -0700 | [diff] [blame] | 339 | if (retval) |
| 340 | dealloc_slot_struct(slot); |
| 341 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 342 | name += strlen(name) + 1; |
| 343 | type += strlen(type) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 345 | dbg("%s - Exit: rc[%d]\n", __func__, retval); |
Linas Vepstas | 31be758 | 2007-04-13 15:34:09 -0700 | [diff] [blame] | 346 | |
| 347 | /* XXX FIXME: reports a failure only if last entry in loop failed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | return retval; |
| 349 | } |
| 350 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | static void __exit cleanup_slots(void) |
| 352 | { |
| 353 | struct list_head *tmp, *n; |
| 354 | struct slot *slot; |
| 355 | |
| 356 | /* |
| 357 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 358 | * and free up all memory that we had allocated. |
| 359 | * memory will be freed in release_slot callback. |
| 360 | */ |
| 361 | |
| 362 | list_for_each_safe(tmp, n, &rpaphp_slot_head) { |
| 363 | slot = list_entry(tmp, struct slot, rpaphp_slot_list); |
| 364 | list_del(&slot->rpaphp_slot_list); |
| 365 | pci_hp_deregister(slot->hotplug_slot); |
| 366 | } |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | static int __init rpaphp_init(void) |
| 371 | { |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 372 | struct device_node *dn = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 374 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 375 | |
John Rose | a57ed79 | 2006-11-13 15:12:52 -0800 | [diff] [blame] | 376 | while ((dn = of_find_node_by_name(dn, "pci"))) |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 377 | rpaphp_add_slot(dn); |
| 378 | |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 379 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | static void __exit rpaphp_exit(void) |
| 383 | { |
| 384 | cleanup_slots(); |
| 385 | } |
| 386 | |
Linas Vepstas | ac1f0e9 | 2007-04-13 15:34:25 -0700 | [diff] [blame] | 387 | static int enable_slot(struct hotplug_slot *hotplug_slot) |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 388 | { |
Linas Vepstas | ac1f0e9 | 2007-04-13 15:34:25 -0700 | [diff] [blame] | 389 | struct slot *slot = (struct slot *)hotplug_slot->private; |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 390 | int state; |
| 391 | int retval; |
| 392 | |
| 393 | if (slot->state == CONFIGURED) |
| 394 | return 0; |
| 395 | |
| 396 | retval = rpaphp_get_sensor_state(slot, &state); |
| 397 | if (retval) |
| 398 | return retval; |
| 399 | |
| 400 | if (state == PRESENT) { |
| 401 | pcibios_add_pci_devices(slot->bus); |
| 402 | slot->state = CONFIGURED; |
| 403 | } else if (state == EMPTY) { |
| 404 | slot->state = EMPTY; |
| 405 | } else { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 406 | err("%s: slot[%s] is in invalid state\n", __func__, slot->name); |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 407 | slot->state = NOT_VALID; |
| 408 | return -EINVAL; |
| 409 | } |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 410 | |
| 411 | slot->bus->max_bus_speed = get_max_bus_speed(slot); |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 412 | return 0; |
| 413 | } |
| 414 | |
Linas Vepstas | ac1f0e9 | 2007-04-13 15:34:25 -0700 | [diff] [blame] | 415 | static int disable_slot(struct hotplug_slot *hotplug_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | struct slot *slot = (struct slot *)hotplug_slot->private; |
linas@austin.ibm.com | 8fe6439 | 2006-01-12 18:26:27 -0600 | [diff] [blame] | 418 | if (slot->state == NOT_CONFIGURED) |
| 419 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
Linas Vepstas | e70ea263 | 2007-04-13 15:34:23 -0700 | [diff] [blame] | 421 | pcibios_remove_pci_devices(slot->bus); |
Benjamin Herrenschmidt | b4a26be | 2010-04-06 15:03:40 +0000 | [diff] [blame] | 422 | vm_unmap_aliases(); |
| 423 | |
linas | 934199e | 2005-09-28 19:33:38 -0500 | [diff] [blame] | 424 | slot->state = NOT_CONFIGURED; |
linas@austin.ibm.com | 8fe6439 | 2006-01-12 18:26:27 -0600 | [diff] [blame] | 425 | return 0; |
| 426 | } |
| 427 | |
linas@austin.ibm.com | b64a71a | 2006-01-12 18:32:58 -0600 | [diff] [blame] | 428 | struct hotplug_slot_ops rpaphp_hotplug_slot_ops = { |
linas@austin.ibm.com | b64a71a | 2006-01-12 18:32:58 -0600 | [diff] [blame] | 429 | .enable_slot = enable_slot, |
| 430 | .disable_slot = disable_slot, |
| 431 | .set_attention_status = set_attention_status, |
| 432 | .get_power_status = get_power_status, |
| 433 | .get_attention_status = get_attention_status, |
| 434 | .get_adapter_status = get_adapter_status, |
linas@austin.ibm.com | b64a71a | 2006-01-12 18:32:58 -0600 | [diff] [blame] | 435 | }; |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | module_init(rpaphp_init); |
| 438 | module_exit(rpaphp_exit); |
| 439 | |
| 440 | EXPORT_SYMBOL_GPL(rpaphp_add_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | EXPORT_SYMBOL_GPL(rpaphp_slot_head); |
| 442 | EXPORT_SYMBOL_GPL(rpaphp_get_drc_props); |