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); |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 42 | EXPORT_SYMBOL_GPL(rpaphp_slot_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #define DRIVER_VERSION "0.1" |
| 45 | #define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>" |
| 46 | #define DRIVER_DESC "RPA HOT Plug PCI Controller Driver" |
| 47 | |
| 48 | #define MAX_LOC_CODE 128 |
| 49 | |
| 50 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 51 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 52 | MODULE_LICENSE("GPL"); |
| 53 | |
Kristen Carlson Accardi | 5d9bc1f | 2008-10-13 09:59:12 -0700 | [diff] [blame] | 54 | module_param_named(debug, rpaphp_debug, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | /** |
| 57 | * set_attention_status - set attention LED |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 58 | * @hotplug_slot: target &hotplug_slot |
| 59 | * @value: LED control value |
| 60 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | * echo 0 > attention -- set LED OFF |
| 62 | * echo 1 > attention -- set LED ON |
| 63 | * echo 2 > attention -- set LED ID(identify, light is blinking) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | */ |
| 65 | static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 66 | { |
Linas Vepstas | c02929c | 2007-04-13 15:34:18 -0700 | [diff] [blame] | 67 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | struct slot *slot = (struct slot *)hotplug_slot->private; |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | switch (value) { |
| 71 | case 0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | case 1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | case 2: |
Linas Vepstas | c02929c | 2007-04-13 15:34:18 -0700 | [diff] [blame] | 74 | break; |
| 75 | default: |
| 76 | value = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | break; |
| 78 | } |
Linas Vepstas | c02929c | 2007-04-13 15:34:18 -0700 | [diff] [blame] | 79 | |
| 80 | rc = rtas_set_indicator(DR_INDICATOR, slot->index, value); |
| 81 | if (!rc) |
| 82 | hotplug_slot->info->attention_status = value; |
| 83 | |
| 84 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | /** |
| 88 | * get_power_status - get power status of a slot |
| 89 | * @hotplug_slot: slot to get status |
| 90 | * @value: pointer to store status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | */ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 92 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
Linas Vepstas | 427310f | 2007-04-13 15:34:13 -0700 | [diff] [blame] | 94 | int retval, level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | struct slot *slot = (struct slot *)hotplug_slot->private; |
| 96 | |
Linas Vepstas | 427310f | 2007-04-13 15:34:13 -0700 | [diff] [blame] | 97 | retval = rtas_get_power_level (slot->power_domain, &level); |
| 98 | if (!retval) |
| 99 | *value = level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | return retval; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * get_attention_status - get attention LED status |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 105 | * @hotplug_slot: slot to get status |
| 106 | * @value: pointer to store status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | */ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 108 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | struct slot *slot = (struct slot *)hotplug_slot->private; |
Linas Vepstas | ebf42c0 | 2007-04-13 15:34:15 -0700 | [diff] [blame] | 111 | *value = slot->hotplug_slot->info->attention_status; |
| 112 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
| 114 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 115 | static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | { |
| 117 | struct slot *slot = (struct slot *)hotplug_slot->private; |
Linas Vepstas | bf0af51 | 2007-04-13 15:34:14 -0700 | [diff] [blame] | 118 | int rc, state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Linas Vepstas | bf0af51 | 2007-04-13 15:34:14 -0700 | [diff] [blame] | 120 | rc = rpaphp_get_sensor_state(slot, &state); |
Linas Vepstas | bf0af51 | 2007-04-13 15:34:14 -0700 | [diff] [blame] | 121 | |
| 122 | *value = NOT_VALID; |
| 123 | if (rc) |
| 124 | return rc; |
| 125 | |
| 126 | if (state == EMPTY) |
| 127 | *value = EMPTY; |
| 128 | else if (state == PRESENT) |
| 129 | *value = slot->state; |
| 130 | |
| 131 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 134 | static enum pci_bus_speed get_max_bus_speed(struct slot *slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | { |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 136 | enum pci_bus_speed speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | switch (slot->type) { |
| 138 | case 1: |
| 139 | case 2: |
| 140 | case 3: |
| 141 | case 4: |
| 142 | case 5: |
| 143 | case 6: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 144 | speed = PCI_SPEED_33MHz; /* speed for case 1-6 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | break; |
| 146 | case 7: |
| 147 | case 8: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 148 | speed = PCI_SPEED_66MHz; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | break; |
| 150 | case 11: |
| 151 | case 14: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 152 | speed = PCI_SPEED_66MHz_PCIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | break; |
| 154 | case 12: |
| 155 | case 15: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 156 | speed = PCI_SPEED_100MHz_PCIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | break; |
| 158 | case 13: |
| 159 | case 16: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 160 | speed = PCI_SPEED_133MHz_PCIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | break; |
| 162 | default: |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 163 | speed = PCI_SPEED_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | } |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 166 | |
| 167 | return speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 170 | static int get_children_props(struct device_node *dn, const int **drc_indexes, |
| 171 | const int **drc_names, const int **drc_types, |
| 172 | const int **drc_power_domains) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 174 | const int *indexes, *names, *types, *domains; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 176 | indexes = of_get_property(dn, "ibm,drc-indexes", NULL); |
| 177 | names = of_get_property(dn, "ibm,drc-names", NULL); |
| 178 | types = of_get_property(dn, "ibm,drc-types", NULL); |
| 179 | domains = of_get_property(dn, "ibm,drc-power-domains", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | if (!indexes || !names || !types || !domains) { |
| 182 | /* Slot does not have dynamically-removable children */ |
| 183 | return -EINVAL; |
| 184 | } |
| 185 | if (drc_indexes) |
| 186 | *drc_indexes = indexes; |
| 187 | if (drc_names) |
| 188 | /* &drc_names[1] contains NULL terminated slot names */ |
| 189 | *drc_names = names; |
| 190 | if (drc_types) |
| 191 | /* &drc_types[1] contains NULL terminated slot types */ |
| 192 | *drc_types = types; |
| 193 | if (drc_power_domains) |
| 194 | *drc_power_domains = domains; |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | /* To get the DRC props describing the current node, first obtain it's |
| 200 | * my-drc-index property. Next obtain the DRC list from it's parent. Use |
| 201 | * the my-drc-index for correlation, and obtain the requested properties. |
| 202 | */ |
| 203 | int rpaphp_get_drc_props(struct device_node *dn, int *drc_index, |
| 204 | char **drc_name, char **drc_type, int *drc_power_domain) |
| 205 | { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 206 | const int *indexes, *names; |
| 207 | const int *types, *domains; |
| 208 | const unsigned int *my_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | char *name_tmp, *type_tmp; |
| 210 | int i, rc; |
| 211 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 212 | my_index = of_get_property(dn, "ibm,my-drc-index", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | if (!my_index) { |
| 214 | /* Node isn't DLPAR/hotplug capable */ |
| 215 | return -EINVAL; |
| 216 | } |
| 217 | |
| 218 | rc = get_children_props(dn->parent, &indexes, &names, &types, &domains); |
| 219 | if (rc < 0) { |
| 220 | return -EINVAL; |
| 221 | } |
| 222 | |
| 223 | name_tmp = (char *) &names[1]; |
| 224 | type_tmp = (char *) &types[1]; |
| 225 | |
| 226 | /* Iterate through parent properties, looking for my-drc-index */ |
Laurent Dufour | 761ce53 | 2014-04-10 15:02:13 +0200 | [diff] [blame] | 227 | for (i = 0; i < be32_to_cpu(indexes[0]); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | if ((unsigned int) indexes[i + 1] == *my_index) { |
| 229 | if (drc_name) |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 230 | *drc_name = name_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | if (drc_type) |
| 232 | *drc_type = type_tmp; |
| 233 | if (drc_index) |
Laurent Dufour | 761ce53 | 2014-04-10 15:02:13 +0200 | [diff] [blame] | 234 | *drc_index = be32_to_cpu(*my_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (drc_power_domain) |
Laurent Dufour | 761ce53 | 2014-04-10 15:02:13 +0200 | [diff] [blame] | 236 | *drc_power_domain = be32_to_cpu(domains[i+1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | return 0; |
| 238 | } |
| 239 | name_tmp += (strlen(name_tmp) + 1); |
| 240 | type_tmp += (strlen(type_tmp) + 1); |
| 241 | } |
| 242 | |
| 243 | return -EINVAL; |
| 244 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 245 | EXPORT_SYMBOL_GPL(rpaphp_get_drc_props); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | static int is_php_type(char *drc_type) |
| 248 | { |
| 249 | unsigned long value; |
| 250 | char *endptr; |
| 251 | |
| 252 | /* PCI Hotplug nodes have an integer for drc_type */ |
| 253 | value = simple_strtoul(drc_type, &endptr, 10); |
| 254 | if (endptr == drc_type) |
| 255 | return 0; |
| 256 | |
| 257 | return 1; |
| 258 | } |
| 259 | |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 260 | /** |
| 261 | * 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] | 262 | * @dn: target &device_node |
| 263 | * @indexes: passed to get_children_props() |
| 264 | * @names: passed to get_children_props() |
| 265 | * @types: returned from get_children_props() |
| 266 | * @power_domains: |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 267 | * |
| 268 | * This routine will return true only if the device node is |
| 269 | * a hotpluggable slot. This routine will return false |
| 270 | * for built-in pci slots (even when the built-in slots are |
| 271 | * dlparable.) |
| 272 | */ |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 273 | static int is_php_dn(struct device_node *dn, const int **indexes, |
| 274 | const int **names, const int **types, const int **power_domains) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 276 | const int *drc_types; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | int rc; |
| 278 | |
| 279 | rc = get_children_props(dn, indexes, names, &drc_types, power_domains); |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 280 | if (rc < 0) |
| 281 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 283 | if (!is_php_type((char *) &drc_types[1])) |
| 284 | return 0; |
| 285 | |
| 286 | *types = drc_types; |
| 287 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
linas@austin.ibm.com | f6afbad | 2006-01-12 18:31:01 -0600 | [diff] [blame] | 290 | /** |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 291 | * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem. |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 292 | * @dn: device node of slot |
linas@austin.ibm.com | f6afbad | 2006-01-12 18:31:01 -0600 | [diff] [blame] | 293 | * |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 294 | * This subroutine will register a hotpluggable slot with the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 295 | * PCI hotplug infrastructure. This routine is typically called |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 296 | * during boot time, if the hotplug slots are present at boot time, |
| 297 | * or is called later, by the dlpar add code, if the slot is |
| 298 | * being dynamically added during runtime. |
| 299 | * |
| 300 | * If the device node points at an embedded (built-in) slot, this |
| 301 | * routine will just return without doing anything, since embedded |
| 302 | * slots cannot be hotplugged. |
| 303 | * |
Randy Dunlap | 26e6c66 | 2007-11-28 09:04:30 -0800 | [diff] [blame] | 304 | * 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] | 305 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | int rpaphp_add_slot(struct device_node *dn) |
| 307 | { |
| 308 | struct slot *slot; |
| 309 | int retval = 0; |
John Rose | 56d8456 | 2005-07-25 10:17:03 -0500 | [diff] [blame] | 310 | int i; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 311 | const int *indexes, *names, *types, *power_domains; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | char *name, *type; |
| 313 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 314 | if (!dn->name || strcmp(dn->name, "pci")) |
| 315 | return 0; |
| 316 | |
Linas Vepstas | da65944 | 2007-04-13 15:34:22 -0700 | [diff] [blame] | 317 | /* If this is not a hotplug slot, return without doing anything. */ |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 318 | if (!is_php_dn(dn, &indexes, &names, &types, &power_domains)) |
| 319 | return 0; |
| 320 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 321 | dbg("Entry %s: dn->full_name=%s\n", __func__, dn->full_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | /* register PCI devices */ |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 324 | name = (char *) &names[1]; |
| 325 | type = (char *) &types[1]; |
Laurent Dufour | 761ce53 | 2014-04-10 15:02:13 +0200 | [diff] [blame] | 326 | for (i = 0; i < be32_to_cpu(indexes[0]); i++) { |
| 327 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Laurent Dufour | 761ce53 | 2014-04-10 15:02:13 +0200 | [diff] [blame] | 329 | index = be32_to_cpu(indexes[i + 1]); |
| 330 | slot = alloc_slot_struct(dn, index, name, |
| 331 | be32_to_cpu(power_domains[i + 1])); |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 332 | if (!slot) |
| 333 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 335 | slot->type = simple_strtoul(type, NULL, 10); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 336 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 337 | dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n", |
Laurent Dufour | 761ce53 | 2014-04-10 15:02:13 +0200 | [diff] [blame] | 338 | index, name, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Linas Vepstas | fea54b8 | 2007-04-13 15:34:20 -0700 | [diff] [blame] | 340 | retval = rpaphp_enable_slot(slot); |
Linas Vepstas | 6f79eb7 | 2007-04-13 15:34:19 -0700 | [diff] [blame] | 341 | if (!retval) |
| 342 | retval = rpaphp_register_slot(slot); |
| 343 | |
Linas Vepstas | 31be758 | 2007-04-13 15:34:09 -0700 | [diff] [blame] | 344 | if (retval) |
| 345 | dealloc_slot_struct(slot); |
| 346 | |
Linas Vepstas | bf8cbae | 2007-04-13 15:34:07 -0700 | [diff] [blame] | 347 | name += strlen(name) + 1; |
| 348 | type += strlen(type) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 350 | dbg("%s - Exit: rc[%d]\n", __func__, retval); |
Linas Vepstas | 31be758 | 2007-04-13 15:34:09 -0700 | [diff] [blame] | 351 | |
| 352 | /* XXX FIXME: reports a failure only if last entry in loop failed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | return retval; |
| 354 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 355 | EXPORT_SYMBOL_GPL(rpaphp_add_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | static void __exit cleanup_slots(void) |
| 358 | { |
| 359 | struct list_head *tmp, *n; |
| 360 | struct slot *slot; |
| 361 | |
| 362 | /* |
| 363 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 364 | * and free up all memory that we had allocated. |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 365 | * memory will be freed in release_slot callback. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | */ |
| 367 | |
| 368 | list_for_each_safe(tmp, n, &rpaphp_slot_head) { |
| 369 | slot = list_entry(tmp, struct slot, rpaphp_slot_list); |
| 370 | list_del(&slot->rpaphp_slot_list); |
| 371 | pci_hp_deregister(slot->hotplug_slot); |
| 372 | } |
| 373 | return; |
| 374 | } |
| 375 | |
| 376 | static int __init rpaphp_init(void) |
| 377 | { |
Grant Likely | ccdb8ed | 2014-06-04 16:42:26 +0100 | [diff] [blame] | 378 | struct device_node *dn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 380 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 381 | |
Grant Likely | ccdb8ed | 2014-06-04 16:42:26 +0100 | [diff] [blame] | 382 | for_each_node_by_name(dn, "pci") |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 383 | rpaphp_add_slot(dn); |
| 384 | |
John Rose | 5eeb8c6 | 2005-07-25 10:16:42 -0500 | [diff] [blame] | 385 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | static void __exit rpaphp_exit(void) |
| 389 | { |
| 390 | cleanup_slots(); |
| 391 | } |
| 392 | |
Linas Vepstas | ac1f0e9 | 2007-04-13 15:34:25 -0700 | [diff] [blame] | 393 | static int enable_slot(struct hotplug_slot *hotplug_slot) |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 394 | { |
Linas Vepstas | ac1f0e9 | 2007-04-13 15:34:25 -0700 | [diff] [blame] | 395 | struct slot *slot = (struct slot *)hotplug_slot->private; |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 396 | int state; |
| 397 | int retval; |
| 398 | |
| 399 | if (slot->state == CONFIGURED) |
| 400 | return 0; |
| 401 | |
| 402 | retval = rpaphp_get_sensor_state(slot, &state); |
| 403 | if (retval) |
| 404 | return retval; |
| 405 | |
| 406 | if (state == PRESENT) { |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 407 | pci_lock_rescan_remove(); |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 408 | pcibios_add_pci_devices(slot->bus); |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 409 | pci_unlock_rescan_remove(); |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 410 | slot->state = CONFIGURED; |
| 411 | } else if (state == EMPTY) { |
| 412 | slot->state = EMPTY; |
| 413 | } else { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 414 | 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] | 415 | slot->state = NOT_VALID; |
| 416 | return -EINVAL; |
| 417 | } |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 418 | |
| 419 | slot->bus->max_bus_speed = get_max_bus_speed(slot); |
linas@austin.ibm.com | e06b80b | 2006-01-12 18:28:22 -0600 | [diff] [blame] | 420 | return 0; |
| 421 | } |
| 422 | |
Linas Vepstas | ac1f0e9 | 2007-04-13 15:34:25 -0700 | [diff] [blame] | 423 | static int disable_slot(struct hotplug_slot *hotplug_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | struct slot *slot = (struct slot *)hotplug_slot->private; |
linas@austin.ibm.com | 8fe6439 | 2006-01-12 18:26:27 -0600 | [diff] [blame] | 426 | if (slot->state == NOT_CONFIGURED) |
| 427 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 429 | pci_lock_rescan_remove(); |
Linas Vepstas | e70ea263 | 2007-04-13 15:34:23 -0700 | [diff] [blame] | 430 | pcibios_remove_pci_devices(slot->bus); |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 431 | pci_unlock_rescan_remove(); |
Benjamin Herrenschmidt | b4a26be | 2010-04-06 15:03:40 +0000 | [diff] [blame] | 432 | vm_unmap_aliases(); |
| 433 | |
linas | 934199e | 2005-09-28 19:33:38 -0500 | [diff] [blame] | 434 | slot->state = NOT_CONFIGURED; |
linas@austin.ibm.com | 8fe6439 | 2006-01-12 18:26:27 -0600 | [diff] [blame] | 435 | return 0; |
| 436 | } |
| 437 | |
linas@austin.ibm.com | b64a71a | 2006-01-12 18:32:58 -0600 | [diff] [blame] | 438 | struct hotplug_slot_ops rpaphp_hotplug_slot_ops = { |
linas@austin.ibm.com | b64a71a | 2006-01-12 18:32:58 -0600 | [diff] [blame] | 439 | .enable_slot = enable_slot, |
| 440 | .disable_slot = disable_slot, |
| 441 | .set_attention_status = set_attention_status, |
| 442 | .get_power_status = get_power_status, |
| 443 | .get_attention_status = get_attention_status, |
| 444 | .get_adapter_status = get_adapter_status, |
linas@austin.ibm.com | b64a71a | 2006-01-12 18:32:58 -0600 | [diff] [blame] | 445 | }; |
| 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | module_init(rpaphp_init); |
| 448 | module_exit(rpaphp_exit); |