Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IBM Hot Plug Controller Driver |
| 3 | * |
| 4 | * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation |
| 5 | * |
| 6 | * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com) |
| 7 | * Copyright (C) 2001-2003 IBM Corp. |
| 8 | * |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or (at |
| 14 | * your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, but |
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 19 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 20 | * details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | * |
| 26 | * Send feedback to <gregkh@us.ibm.com> |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/pci.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/delay.h> |
| 36 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "../pci.h" |
Jaswinder Singh Rajput | 8248771 | 2008-12-27 18:32:28 +0530 | [diff] [blame] | 38 | #include <asm/pci_x86.h> /* for struct irq_routing_table */ |
Jiang Liu | 8643e28 | 2014-10-27 16:12:04 +0800 | [diff] [blame] | 39 | #include <asm/io_apic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "ibmphp.h" |
| 41 | |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 42 | #define attn_on(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON) |
| 43 | #define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF) |
| 44 | #define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED) |
| 45 | #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev) |
| 46 | #define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #define DRIVER_VERSION "0.6" |
| 49 | #define DRIVER_DESC "IBM Hot Plug PCI Controller Driver" |
| 50 | |
| 51 | int ibmphp_debug; |
| 52 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 53 | static bool debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 55 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); |
| 56 | MODULE_LICENSE("GPL"); |
| 57 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | struct pci_bus *ibmphp_pci_bus; |
| 60 | static int max_slots; |
| 61 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 62 | static int irqs[16]; /* PIC mode IRQs we're using so far (in case MPS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | * tables don't provide default info for empty slots */ |
| 64 | |
| 65 | static int init_flag; |
| 66 | |
| 67 | /* |
| 68 | static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8); |
| 69 | |
| 70 | static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value) |
| 71 | { |
| 72 | return get_max_adapter_speed_1 (hs, value, 1); |
| 73 | } |
| 74 | */ |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 75 | static inline int get_cur_bus_info(struct slot **sl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
| 77 | int rc = 1; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 78 | struct slot *slot_cur = *sl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | debug("options = %x\n", slot_cur->ctrl->options); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 81 | debug("revision = %x\n", slot_cur->ctrl->revision); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 83 | if (READ_BUS_STATUS(slot_cur->ctrl)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 85 | |
| 86 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | return rc; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus); |
| 90 | if (READ_BUS_MODE(slot_cur->ctrl)) |
| 91 | slot_cur->bus_on->current_bus_mode = |
| 92 | CURRENT_BUS_MODE(slot_cur->busstatus); |
| 93 | else |
| 94 | slot_cur->bus_on->current_bus_mode = 0xFF; |
| 95 | |
| 96 | debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n", |
| 97 | slot_cur->busstatus, |
| 98 | slot_cur->bus_on->current_speed, |
| 99 | slot_cur->bus_on->current_bus_mode); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | *sl = slot_cur; |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | static inline int slot_update(struct slot **sl) |
| 106 | { |
| 107 | int rc; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 108 | rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL); |
| 109 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | return rc; |
| 111 | if (!init_flag) |
| 112 | rc = get_cur_bus_info(sl); |
| 113 | return rc; |
| 114 | } |
| 115 | |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 116 | static int __init get_max_slots(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 118 | struct slot *slot_cur; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | u8 slot_count = 0; |
| 120 | |
Geliang Tang | 2ac83cc | 2015-12-12 21:36:57 +0800 | [diff] [blame] | 121 | list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | /* sometimes the hot-pluggable slots start with 4 (not always from 1) */ |
| 123 | slot_count = max(slot_count, slot_cur->number); |
| 124 | } |
| 125 | return slot_count; |
| 126 | } |
| 127 | |
| 128 | /* This routine will put the correct slot->device information per slot. It's |
| 129 | * called from initialization of the slot structures. It will also assign |
| 130 | * interrupt numbers per each slot. |
| 131 | * Parameters: struct slot |
| 132 | * Returns 0 or errors |
| 133 | */ |
| 134 | int ibmphp_init_devno(struct slot **cur_slot) |
| 135 | { |
| 136 | struct irq_routing_table *rtable; |
| 137 | int len; |
| 138 | int loop; |
| 139 | int i; |
| 140 | |
| 141 | rtable = pcibios_get_irq_routing_table(); |
| 142 | if (!rtable) { |
| 143 | err("no BIOS routing table...\n"); |
| 144 | return -ENOMEM; |
| 145 | } |
| 146 | |
| 147 | len = (rtable->size - sizeof(struct irq_routing_table)) / |
| 148 | sizeof(struct irq_info); |
| 149 | |
Jesper Juhl | 029c3c1 | 2008-03-22 00:07:13 +0100 | [diff] [blame] | 150 | if (!len) { |
| 151 | kfree(rtable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | return -1; |
Jesper Juhl | 029c3c1 | 2008-03-22 00:07:13 +0100 | [diff] [blame] | 153 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | for (loop = 0; loop < len; loop++) { |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 155 | if ((*cur_slot)->number == rtable->slots[loop].slot && |
| 156 | (*cur_slot)->bus == rtable->slots[loop].bus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn); |
| 158 | for (i = 0; i < 4; i++) |
| 159 | (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus, |
Jiang Liu | 25d0d35 | 2014-10-27 16:11:54 +0800 | [diff] [blame] | 160 | (int) (*cur_slot)->device, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 162 | debug("(*cur_slot)->irq[0] = %x\n", |
| 163 | (*cur_slot)->irq[0]); |
| 164 | debug("(*cur_slot)->irq[1] = %x\n", |
| 165 | (*cur_slot)->irq[1]); |
| 166 | debug("(*cur_slot)->irq[2] = %x\n", |
| 167 | (*cur_slot)->irq[2]); |
| 168 | debug("(*cur_slot)->irq[3] = %x\n", |
| 169 | (*cur_slot)->irq[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 171 | debug("rtable->exclusive_irqs = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | rtable->exclusive_irqs); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 173 | debug("rtable->slots[loop].irq[0].bitmap = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | rtable->slots[loop].irq[0].bitmap); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 175 | debug("rtable->slots[loop].irq[1].bitmap = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | rtable->slots[loop].irq[1].bitmap); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 177 | debug("rtable->slots[loop].irq[2].bitmap = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | rtable->slots[loop].irq[2].bitmap); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 179 | debug("rtable->slots[loop].irq[3].bitmap = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | rtable->slots[loop].irq[3].bitmap); |
| 181 | |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 182 | debug("rtable->slots[loop].irq[0].link = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | rtable->slots[loop].irq[0].link); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 184 | debug("rtable->slots[loop].irq[1].link = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | rtable->slots[loop].irq[1].link); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 186 | debug("rtable->slots[loop].irq[2].link = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | rtable->slots[loop].irq[2].link); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 188 | debug("rtable->slots[loop].irq[3].link = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | rtable->slots[loop].irq[3].link); |
Yinghai Lu | e20c06f | 2009-05-06 10:08:22 -0700 | [diff] [blame] | 190 | debug("end of init_devno\n"); |
| 191 | kfree(rtable); |
| 192 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | } |
| 195 | |
Jesper Juhl | 029c3c1 | 2008-03-22 00:07:13 +0100 | [diff] [blame] | 196 | kfree(rtable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | return -1; |
| 198 | } |
| 199 | |
| 200 | static inline int power_on(struct slot *slot_cur) |
| 201 | { |
| 202 | u8 cmd = HPC_SLOT_ON; |
| 203 | int retval; |
| 204 | |
| 205 | retval = ibmphp_hpc_writeslot(slot_cur, cmd); |
| 206 | if (retval) { |
| 207 | err("power on failed\n"); |
| 208 | return retval; |
| 209 | } |
| 210 | if (CTLR_RESULT(slot_cur->ctrl->status)) { |
| 211 | err("command not completed successfully in power_on\n"); |
| 212 | return -EIO; |
| 213 | } |
| 214 | msleep(3000); /* For ServeRAID cards, and some 66 PCI */ |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | static inline int power_off(struct slot *slot_cur) |
| 219 | { |
| 220 | u8 cmd = HPC_SLOT_OFF; |
| 221 | int retval; |
| 222 | |
| 223 | retval = ibmphp_hpc_writeslot(slot_cur, cmd); |
| 224 | if (retval) { |
| 225 | err("power off failed\n"); |
| 226 | return retval; |
| 227 | } |
| 228 | if (CTLR_RESULT(slot_cur->ctrl->status)) { |
| 229 | err("command not completed successfully in power_off\n"); |
| 230 | retval = -EIO; |
| 231 | } |
| 232 | return retval; |
| 233 | } |
| 234 | |
| 235 | static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 236 | { |
| 237 | int rc = 0; |
| 238 | struct slot *pslot; |
Pavel Machek | 072888f | 2006-01-08 20:11:59 +0100 | [diff] [blame] | 239 | u8 cmd = 0x00; /* avoid compiler warning */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n", |
| 242 | (ulong) hotplug_slot, value); |
| 243 | ibmphp_lock_operations(); |
Pavel Machek | 072888f | 2006-01-08 20:11:59 +0100 | [diff] [blame] | 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | if (hotplug_slot) { |
| 247 | switch (value) { |
| 248 | case HPC_SLOT_ATTN_OFF: |
| 249 | cmd = HPC_SLOT_ATTNOFF; |
| 250 | break; |
| 251 | case HPC_SLOT_ATTN_ON: |
| 252 | cmd = HPC_SLOT_ATTNON; |
| 253 | break; |
| 254 | case HPC_SLOT_ATTN_BLINK: |
| 255 | cmd = HPC_SLOT_BLINKLED; |
| 256 | break; |
| 257 | default: |
| 258 | rc = -ENODEV; |
| 259 | err("set_attention_status - Error : invalid input [%x]\n", |
| 260 | value); |
| 261 | break; |
| 262 | } |
| 263 | if (rc == 0) { |
| 264 | pslot = hotplug_slot->private; |
| 265 | if (pslot) |
| 266 | rc = ibmphp_hpc_writeslot(pslot, cmd); |
| 267 | else |
| 268 | rc = -ENODEV; |
| 269 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 270 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | rc = -ENODEV; |
| 272 | |
| 273 | ibmphp_unlock_operations(); |
| 274 | |
| 275 | debug("set_attention_status - Exit rc[%d]\n", rc); |
| 276 | return rc; |
| 277 | } |
| 278 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 279 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | { |
| 281 | int rc = -ENODEV; |
| 282 | struct slot *pslot; |
| 283 | struct slot myslot; |
| 284 | |
| 285 | debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", |
| 286 | (ulong) hotplug_slot, (ulong) value); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | ibmphp_lock_operations(); |
Eric Sesterhenn | 9df7fde | 2006-06-01 11:41:44 +0200 | [diff] [blame] | 289 | if (hotplug_slot) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | pslot = hotplug_slot->private; |
| 291 | if (pslot) { |
| 292 | memcpy(&myslot, pslot, sizeof(struct slot)); |
| 293 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, |
| 294 | &(myslot.status)); |
| 295 | if (!rc) |
| 296 | rc = ibmphp_hpc_readslot(pslot, |
| 297 | READ_EXTSLOTSTATUS, |
| 298 | &(myslot.ext_status)); |
| 299 | if (!rc) |
| 300 | *value = SLOT_ATTN(myslot.status, |
| 301 | myslot.ext_status); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | ibmphp_unlock_operations(); |
| 306 | debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value); |
| 307 | return rc; |
| 308 | } |
| 309 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 310 | static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
| 312 | int rc = -ENODEV; |
| 313 | struct slot *pslot; |
| 314 | struct slot myslot; |
| 315 | |
| 316 | debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", |
| 317 | (ulong) hotplug_slot, (ulong) value); |
| 318 | ibmphp_lock_operations(); |
Eric Sesterhenn | 9df7fde | 2006-06-01 11:41:44 +0200 | [diff] [blame] | 319 | if (hotplug_slot) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | pslot = hotplug_slot->private; |
| 321 | if (pslot) { |
| 322 | memcpy(&myslot, pslot, sizeof(struct slot)); |
| 323 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, |
| 324 | &(myslot.status)); |
| 325 | if (!rc) |
| 326 | *value = SLOT_LATCH(myslot.status); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | ibmphp_unlock_operations(); |
| 331 | debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n", |
| 332 | rc, rc, *value); |
| 333 | return rc; |
| 334 | } |
| 335 | |
| 336 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 337 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | { |
| 339 | int rc = -ENODEV; |
| 340 | struct slot *pslot; |
| 341 | struct slot myslot; |
| 342 | |
| 343 | debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", |
| 344 | (ulong) hotplug_slot, (ulong) value); |
| 345 | ibmphp_lock_operations(); |
Eric Sesterhenn | 9df7fde | 2006-06-01 11:41:44 +0200 | [diff] [blame] | 346 | if (hotplug_slot) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | pslot = hotplug_slot->private; |
| 348 | if (pslot) { |
| 349 | memcpy(&myslot, pslot, sizeof(struct slot)); |
| 350 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, |
| 351 | &(myslot.status)); |
| 352 | if (!rc) |
| 353 | *value = SLOT_PWRGD(myslot.status); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | ibmphp_unlock_operations(); |
| 358 | debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n", |
| 359 | rc, rc, *value); |
| 360 | return rc; |
| 361 | } |
| 362 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 363 | static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | { |
| 365 | int rc = -ENODEV; |
| 366 | struct slot *pslot; |
| 367 | u8 present; |
| 368 | struct slot myslot; |
| 369 | |
| 370 | debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", |
| 371 | (ulong) hotplug_slot, (ulong) value); |
| 372 | ibmphp_lock_operations(); |
Eric Sesterhenn | 9df7fde | 2006-06-01 11:41:44 +0200 | [diff] [blame] | 373 | if (hotplug_slot) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | pslot = hotplug_slot->private; |
| 375 | if (pslot) { |
| 376 | memcpy(&myslot, pslot, sizeof(struct slot)); |
| 377 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, |
| 378 | &(myslot.status)); |
| 379 | if (!rc) { |
| 380 | present = SLOT_PRESENT(myslot.status); |
| 381 | if (present == HPC_SLOT_EMPTY) |
| 382 | *value = 0; |
| 383 | else |
| 384 | *value = 1; |
| 385 | } |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | ibmphp_unlock_operations(); |
| 390 | debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value); |
| 391 | return rc; |
| 392 | } |
| 393 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 394 | static int get_max_bus_speed(struct slot *slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 396 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | u8 mode = 0; |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 398 | enum pci_bus_speed speed; |
| 399 | struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 401 | debug("%s - Entry slot[%p]\n", __func__, slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | ibmphp_lock_operations(); |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 404 | mode = slot->supported_bus_mode; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 405 | speed = slot->supported_speed; |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 406 | ibmphp_unlock_operations(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 408 | switch (speed) { |
| 409 | case BUS_SPEED_33: |
| 410 | break; |
| 411 | case BUS_SPEED_66: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 412 | if (mode == BUS_MODE_PCIX) |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 413 | speed += 0x01; |
| 414 | break; |
| 415 | case BUS_SPEED_100: |
| 416 | case BUS_SPEED_133: |
| 417 | speed += 0x01; |
| 418 | break; |
| 419 | default: |
| 420 | /* Note (will need to change): there would be soon 256, 512 also */ |
| 421 | rc = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 424 | if (!rc) |
| 425 | bus->max_bus_speed = speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 427 | debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | return rc; |
| 429 | } |
| 430 | |
| 431 | /* |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 432 | static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | { |
| 434 | int rc = -ENODEV; |
| 435 | struct slot *pslot; |
| 436 | struct slot myslot; |
| 437 | |
| 438 | debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n", |
| 439 | (ulong)hotplug_slot, (ulong) value); |
| 440 | |
| 441 | if (flag) |
| 442 | ibmphp_lock_operations(); |
| 443 | |
| 444 | if (hotplug_slot && value) { |
| 445 | pslot = hotplug_slot->private; |
| 446 | if (pslot) { |
| 447 | memcpy(&myslot, pslot, sizeof(struct slot)); |
| 448 | rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, |
| 449 | &(myslot.status)); |
| 450 | |
| 451 | if (!(SLOT_LATCH (myslot.status)) && |
| 452 | (SLOT_PRESENT (myslot.status))) { |
| 453 | rc = ibmphp_hpc_readslot(pslot, |
| 454 | READ_EXTSLOTSTATUS, |
| 455 | &(myslot.ext_status)); |
| 456 | if (!rc) |
| 457 | *value = SLOT_SPEED(myslot.ext_status); |
| 458 | } else |
| 459 | *value = MAX_ADAPTER_NONE; |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 460 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | if (flag) |
| 464 | ibmphp_unlock_operations(); |
| 465 | |
| 466 | debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value); |
| 467 | return rc; |
| 468 | } |
| 469 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 470 | static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
| 472 | int rc = -ENODEV; |
| 473 | struct slot *pslot = NULL; |
| 474 | |
| 475 | debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot); |
| 476 | |
| 477 | ibmphp_lock_operations(); |
| 478 | |
| 479 | if (hotplug_slot) { |
| 480 | pslot = hotplug_slot->private; |
| 481 | if (pslot) { |
| 482 | rc = 0; |
| 483 | snprintf(value, 100, "Bus %x", pslot->bus); |
| 484 | } |
| 485 | } else |
| 486 | rc = -ENODEV; |
| 487 | |
| 488 | ibmphp_unlock_operations(); |
| 489 | debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value); |
| 490 | return rc; |
| 491 | } |
| 492 | */ |
| 493 | |
| 494 | /**************************************************************************** |
| 495 | * This routine will initialize the ops data structure used in the validate |
| 496 | * function. It will also power off empty slots that are powered on since BIOS |
| 497 | * leaves those on, albeit disconnected |
| 498 | ****************************************************************************/ |
| 499 | static int __init init_ops(void) |
| 500 | { |
| 501 | struct slot *slot_cur; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | int retval; |
| 503 | int rc; |
| 504 | |
Geliang Tang | 2ac83cc | 2015-12-12 21:36:57 +0800 | [diff] [blame] | 505 | list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | debug("BEFORE GETTING SLOT STATUS, slot # %x\n", |
| 507 | slot_cur->number); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 508 | if (slot_cur->ctrl->revision == 0xFF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | if (get_ctrl_revision(slot_cur, |
| 510 | &slot_cur->ctrl->revision)) |
| 511 | return -1; |
| 512 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 513 | if (slot_cur->bus_on->current_speed == 0xFF) |
| 514 | if (get_cur_bus_info(&slot_cur)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | return -1; |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 516 | get_max_bus_speed(slot_cur); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | if (slot_cur->ctrl->options == 0xFF) |
| 519 | if (get_hpc_options(slot_cur, &slot_cur->ctrl->options)) |
| 520 | return -1; |
| 521 | |
| 522 | retval = slot_update(&slot_cur); |
| 523 | if (retval) |
| 524 | return retval; |
| 525 | |
| 526 | debug("status = %x\n", slot_cur->status); |
| 527 | debug("ext_status = %x\n", slot_cur->ext_status); |
| 528 | debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status)); |
| 529 | debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status)); |
| 530 | debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status)); |
| 531 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 532 | if ((SLOT_PWRGD(slot_cur->status)) && |
| 533 | !(SLOT_PRESENT(slot_cur->status)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | !(SLOT_LATCH(slot_cur->status))) { |
| 535 | debug("BEFORE POWER OFF COMMAND\n"); |
| 536 | rc = power_off(slot_cur); |
| 537 | if (rc) |
| 538 | return rc; |
| 539 | |
| 540 | /* retval = slot_update(&slot_cur); |
| 541 | * if (retval) |
| 542 | * return retval; |
| 543 | * ibmphp_update_slot_info(slot_cur); |
| 544 | */ |
| 545 | } |
| 546 | } |
| 547 | init_flag = 0; |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | /* This operation will check whether the slot is within the bounds and |
| 552 | * the operation is valid to perform on that slot |
| 553 | * Parameters: slot, operation |
| 554 | * Returns: 0 or error codes |
| 555 | */ |
| 556 | static int validate(struct slot *slot_cur, int opn) |
| 557 | { |
| 558 | int number; |
| 559 | int retval; |
| 560 | |
| 561 | if (!slot_cur) |
| 562 | return -ENODEV; |
| 563 | number = slot_cur->number; |
| 564 | if ((number > max_slots) || (number < 0)) |
| 565 | return -EBADSLT; |
| 566 | debug("slot_number in validate is %d\n", slot_cur->number); |
| 567 | |
| 568 | retval = slot_update(&slot_cur); |
| 569 | if (retval) |
| 570 | return retval; |
| 571 | |
| 572 | switch (opn) { |
| 573 | case ENABLE: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 574 | if (!(SLOT_PWRGD(slot_cur->status)) && |
| 575 | (SLOT_PRESENT(slot_cur->status)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | !(SLOT_LATCH(slot_cur->status))) |
| 577 | return 0; |
| 578 | break; |
| 579 | case DISABLE: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 580 | if ((SLOT_PWRGD(slot_cur->status)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | (SLOT_PRESENT(slot_cur->status)) && |
| 582 | !(SLOT_LATCH(slot_cur->status))) |
| 583 | return 0; |
| 584 | break; |
| 585 | default: |
| 586 | break; |
| 587 | } |
| 588 | err("validate failed....\n"); |
| 589 | return -EINVAL; |
| 590 | } |
| 591 | |
| 592 | /**************************************************************************** |
| 593 | * This routine is for updating the data structures in the hotplug core |
| 594 | * Parameters: struct slot |
| 595 | * Returns: 0 or error |
| 596 | ****************************************************************************/ |
| 597 | int ibmphp_update_slot_info(struct slot *slot_cur) |
| 598 | { |
| 599 | struct hotplug_slot_info *info; |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 600 | struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | int rc; |
| 602 | u8 bus_speed; |
| 603 | u8 mode; |
| 604 | |
| 605 | info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); |
| 606 | if (!info) { |
| 607 | err("out of system memory\n"); |
| 608 | return -ENOMEM; |
| 609 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 610 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | info->power_status = SLOT_PWRGD(slot_cur->status); |
| 612 | info->attention_status = SLOT_ATTN(slot_cur->status, |
| 613 | slot_cur->ext_status); |
| 614 | info->latch_status = SLOT_LATCH(slot_cur->status); |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 615 | if (!SLOT_PRESENT(slot_cur->status)) { |
| 616 | info->adapter_status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | /* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */ |
| 618 | } else { |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 619 | info->adapter_status = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | /* get_max_adapter_speed_1(slot_cur->hotplug_slot, |
| 621 | &info->max_adapter_speed_status, 0); */ |
| 622 | } |
| 623 | |
| 624 | bus_speed = slot_cur->bus_on->current_speed; |
| 625 | mode = slot_cur->bus_on->current_bus_mode; |
| 626 | |
| 627 | switch (bus_speed) { |
| 628 | case BUS_SPEED_33: |
| 629 | break; |
| 630 | case BUS_SPEED_66: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 631 | if (mode == BUS_MODE_PCIX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | bus_speed += 0x01; |
| 633 | else if (mode == BUS_MODE_PCI) |
| 634 | ; |
| 635 | else |
| 636 | bus_speed = PCI_SPEED_UNKNOWN; |
| 637 | break; |
| 638 | case BUS_SPEED_100: |
| 639 | case BUS_SPEED_133: |
| 640 | bus_speed += 0x01; |
| 641 | break; |
| 642 | default: |
| 643 | bus_speed = PCI_SPEED_UNKNOWN; |
| 644 | } |
| 645 | |
Matthew Wilcox | 3749c51 | 2009-12-13 08:11:32 -0500 | [diff] [blame] | 646 | bus->cur_bus_speed = bus_speed; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 647 | // To do: bus_names |
| 648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info); |
| 650 | kfree(info); |
| 651 | return rc; |
| 652 | } |
| 653 | |
| 654 | |
| 655 | /****************************************************************************** |
| 656 | * This function will return the pci_func, given bus and devfunc, or NULL. It |
| 657 | * is called from visit routines |
| 658 | ******************************************************************************/ |
| 659 | |
| 660 | static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function) |
| 661 | { |
| 662 | struct pci_func *func_cur; |
| 663 | struct slot *slot_cur; |
Geliang Tang | 2ac83cc | 2015-12-12 21:36:57 +0800 | [diff] [blame] | 664 | list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | if (slot_cur->func) { |
| 666 | func_cur = slot_cur->func; |
| 667 | while (func_cur) { |
| 668 | if ((func_cur->busno == busno) && |
| 669 | (func_cur->device == device) && |
| 670 | (func_cur->function == function)) |
| 671 | return func_cur; |
| 672 | func_cur = func_cur->next; |
| 673 | } |
| 674 | } |
| 675 | } |
| 676 | return NULL; |
| 677 | } |
| 678 | |
| 679 | /************************************************************* |
| 680 | * This routine frees up memory used by struct slot, including |
| 681 | * the pointers to pci_func, bus, hotplug_slot, controller, |
| 682 | * and deregistering from the hotplug core |
| 683 | *************************************************************/ |
| 684 | static void free_slots(void) |
| 685 | { |
Geliang Tang | 2ac83cc | 2015-12-12 21:36:57 +0800 | [diff] [blame] | 686 | struct slot *slot_cur, *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 688 | debug("%s -- enter\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
Geliang Tang | 2ac83cc | 2015-12-12 21:36:57 +0800 | [diff] [blame] | 690 | list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head, |
| 691 | ibm_slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | pci_hp_deregister(slot_cur->hotplug_slot); |
| 693 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 694 | debug("%s -- exit\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | static void ibm_unconfigure_device(struct pci_func *func) |
| 698 | { |
| 699 | struct pci_dev *temp; |
| 700 | u8 j; |
| 701 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 702 | debug("inside %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | debug("func->device = %x, func->function = %x\n", |
| 704 | func->device, func->function); |
| 705 | debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0); |
| 706 | |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 707 | pci_lock_rescan_remove(); |
| 708 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | for (j = 0; j < 0x08; j++) { |
Joonwoo Park | f362b8b | 2007-10-12 16:20:29 -0700 | [diff] [blame] | 710 | temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j); |
| 711 | if (temp) { |
Yinghai Lu | 210647a | 2012-02-25 13:54:20 -0800 | [diff] [blame] | 712 | pci_stop_and_remove_bus_device(temp); |
Joonwoo Park | f362b8b | 2007-10-12 16:20:29 -0700 | [diff] [blame] | 713 | pci_dev_put(temp); |
| 714 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | } |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 716 | |
Joonwoo Park | f362b8b | 2007-10-12 16:20:29 -0700 | [diff] [blame] | 717 | pci_dev_put(func->dev); |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 718 | |
| 719 | pci_unlock_rescan_remove(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | /* |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 723 | * The following function is to fix kernel bug regarding |
| 724 | * getting bus entries, here we manually add those primary |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | * bus entries to kernel bus structure whenever apply |
| 726 | */ |
| 727 | static u8 bus_structure_fixup(u8 busno) |
| 728 | { |
Yijing Wang | c90570d | 2015-03-09 10:33:58 +0800 | [diff] [blame] | 729 | struct pci_bus *bus, *b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | struct pci_dev *dev; |
| 731 | u16 l; |
| 732 | |
| 733 | if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno))) |
| 734 | return 1; |
| 735 | |
| 736 | bus = kmalloc(sizeof(*bus), GFP_KERNEL); |
| 737 | if (!bus) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 738 | err("%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | return 1; |
| 740 | } |
| 741 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); |
| 742 | if (!dev) { |
| 743 | kfree(bus); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 744 | err("%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | return 1; |
| 746 | } |
| 747 | |
| 748 | bus->number = busno; |
| 749 | bus->ops = ibmphp_pci_bus->ops; |
| 750 | dev->bus = bus; |
| 751 | for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) { |
| 752 | if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) && |
| 753 | (l != 0x0000) && (l != 0xffff)) { |
Masanari Iida | 367fa98 | 2012-07-23 22:39:51 +0900 | [diff] [blame] | 754 | debug("%s - Inside bus_structure_fixup()\n", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 755 | __func__); |
Yijing Wang | c90570d | 2015-03-09 10:33:58 +0800 | [diff] [blame] | 756 | b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL); |
| 757 | if (!b) |
| 758 | continue; |
| 759 | |
| 760 | pci_bus_add_devices(b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | break; |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | kfree(dev); |
| 766 | kfree(bus); |
| 767 | |
| 768 | return 0; |
| 769 | } |
| 770 | |
| 771 | static int ibm_configure_device(struct pci_func *func) |
| 772 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | struct pci_bus *child; |
| 774 | int num; |
| 775 | int flag = 0; /* this is to make sure we don't double scan the bus, |
| 776 | for bridged devices primarily */ |
| 777 | |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 778 | pci_lock_rescan_remove(); |
| 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | if (!(bus_structure_fixup(func->busno))) |
| 781 | flag = 1; |
| 782 | if (func->dev == NULL) |
Joonwoo Park | f362b8b | 2007-10-12 16:20:29 -0700 | [diff] [blame] | 783 | func->dev = pci_get_bus_and_slot(func->busno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | PCI_DEVFN(func->device, func->function)); |
| 785 | |
| 786 | if (func->dev == NULL) { |
| 787 | struct pci_bus *bus = pci_find_bus(0, func->busno); |
| 788 | if (!bus) |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 789 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | num = pci_scan_slot(bus, |
| 792 | PCI_DEVFN(func->device, func->function)); |
| 793 | if (num) |
| 794 | pci_bus_add_devices(bus); |
| 795 | |
Joonwoo Park | f362b8b | 2007-10-12 16:20:29 -0700 | [diff] [blame] | 796 | func->dev = pci_get_bus_and_slot(func->busno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | PCI_DEVFN(func->device, func->function)); |
| 798 | if (func->dev == NULL) { |
| 799 | err("ERROR... : pci_dev still NULL\n"); |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 800 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | } |
| 803 | if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) { |
Yinghai Lu | 2d7abf3 | 2012-05-17 18:58:41 -0700 | [diff] [blame] | 804 | pci_hp_add_bridge(func->dev); |
| 805 | child = func->dev->subordinate; |
| 806 | if (child) |
| 807 | pci_bus_add_devices(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | } |
| 809 | |
Rafael J. Wysocki | c4ec84c | 2014-01-14 12:03:14 -0700 | [diff] [blame] | 810 | out: |
| 811 | pci_unlock_rescan_remove(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | return 0; |
| 813 | } |
| 814 | |
| 815 | /******************************************************* |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 816 | * Returns whether the bus is empty or not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | *******************************************************/ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 818 | static int is_bus_empty(struct slot *slot_cur) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | { |
| 820 | int rc; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 821 | struct slot *tmp_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | u8 i = slot_cur->bus_on->slot_min; |
| 823 | |
| 824 | while (i <= slot_cur->bus_on->slot_max) { |
| 825 | if (i == slot_cur->number) { |
| 826 | i++; |
| 827 | continue; |
| 828 | } |
| 829 | tmp_slot = ibmphp_get_slot_from_physical_num(i); |
| 830 | if (!tmp_slot) |
| 831 | return 0; |
| 832 | rc = slot_update(&tmp_slot); |
| 833 | if (rc) |
| 834 | return 0; |
| 835 | if (SLOT_PRESENT(tmp_slot->status) && |
| 836 | SLOT_PWRGD(tmp_slot->status)) |
| 837 | return 0; |
| 838 | i++; |
| 839 | } |
| 840 | return 1; |
| 841 | } |
| 842 | |
| 843 | /*********************************************************** |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 844 | * If the HPC permits and the bus currently empty, tries to set the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | * bus speed and mode at the maximum card and bus capability |
| 846 | * Parameters: slot |
| 847 | * Returns: bus is set (0) or error code |
| 848 | ***********************************************************/ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 849 | static int set_bus(struct slot *slot_cur) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | { |
| 851 | int rc; |
| 852 | u8 speed; |
| 853 | u8 cmd = 0x0; |
| 854 | int retval; |
| 855 | static struct pci_device_id ciobx[] = { |
| 856 | { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) }, |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 857 | { }, |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 858 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 860 | debug("%s - entry slot # %d\n", __func__, slot_cur->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) { |
| 862 | rc = slot_update(&slot_cur); |
| 863 | if (rc) |
| 864 | return rc; |
| 865 | speed = SLOT_SPEED(slot_cur->ext_status); |
| 866 | debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed); |
| 867 | switch (speed) { |
| 868 | case HPC_SLOT_SPEED_33: |
| 869 | cmd = HPC_BUS_33CONVMODE; |
| 870 | break; |
| 871 | case HPC_SLOT_SPEED_66: |
| 872 | if (SLOT_PCIX(slot_cur->ext_status)) { |
| 873 | if ((slot_cur->supported_speed >= BUS_SPEED_66) && |
| 874 | (slot_cur->supported_bus_mode == BUS_MODE_PCIX)) |
| 875 | cmd = HPC_BUS_66PCIXMODE; |
| 876 | else if (!SLOT_BUS_MODE(slot_cur->ext_status)) |
| 877 | /* if max slot/bus capability is 66 pci |
| 878 | and there's no bus mode mismatch, then |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 879 | the adapter supports 66 pci */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | cmd = HPC_BUS_66CONVMODE; |
| 881 | else |
| 882 | cmd = HPC_BUS_33CONVMODE; |
| 883 | } else { |
| 884 | if (slot_cur->supported_speed >= BUS_SPEED_66) |
| 885 | cmd = HPC_BUS_66CONVMODE; |
| 886 | else |
| 887 | cmd = HPC_BUS_33CONVMODE; |
| 888 | } |
| 889 | break; |
| 890 | case HPC_SLOT_SPEED_133: |
| 891 | switch (slot_cur->supported_speed) { |
| 892 | case BUS_SPEED_33: |
| 893 | cmd = HPC_BUS_33CONVMODE; |
| 894 | break; |
| 895 | case BUS_SPEED_66: |
| 896 | if (slot_cur->supported_bus_mode == BUS_MODE_PCIX) |
| 897 | cmd = HPC_BUS_66PCIXMODE; |
| 898 | else |
| 899 | cmd = HPC_BUS_66CONVMODE; |
| 900 | break; |
| 901 | case BUS_SPEED_100: |
| 902 | cmd = HPC_BUS_100PCIXMODE; |
| 903 | break; |
| 904 | case BUS_SPEED_133: |
| 905 | /* This is to take care of the bug in CIOBX chip */ |
| 906 | if (pci_dev_present(ciobx)) |
| 907 | ibmphp_hpc_writeslot(slot_cur, |
| 908 | HPC_BUS_100PCIXMODE); |
| 909 | cmd = HPC_BUS_133PCIXMODE; |
| 910 | break; |
| 911 | default: |
| 912 | err("Wrong bus speed\n"); |
| 913 | return -ENODEV; |
| 914 | } |
| 915 | break; |
| 916 | default: |
| 917 | err("wrong slot speed\n"); |
| 918 | return -ENODEV; |
| 919 | } |
| 920 | debug("setting bus speed for slot %d, cmd %x\n", |
| 921 | slot_cur->number, cmd); |
| 922 | retval = ibmphp_hpc_writeslot(slot_cur, cmd); |
| 923 | if (retval) { |
| 924 | err("setting bus speed failed\n"); |
| 925 | return retval; |
| 926 | } |
| 927 | if (CTLR_RESULT(slot_cur->ctrl->status)) { |
| 928 | err("command not completed successfully in set_bus\n"); |
| 929 | return -EIO; |
| 930 | } |
| 931 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 932 | /* This is for x440, once Brandon fixes the firmware, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | will not need this delay */ |
| 934 | msleep(1000); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 935 | debug("%s -Exit\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | return 0; |
| 937 | } |
| 938 | |
| 939 | /* This routine checks the bus limitations that the slot is on from the BIOS. |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 940 | * This is used in deciding whether or not to power up the slot. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 942 | * same bus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | * Parameters: slot |
| 944 | * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus |
| 945 | */ |
| 946 | static int check_limitations(struct slot *slot_cur) |
| 947 | { |
| 948 | u8 i; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 949 | struct slot *tmp_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | u8 count = 0; |
| 951 | u8 limitation = 0; |
| 952 | |
| 953 | for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) { |
| 954 | tmp_slot = ibmphp_get_slot_from_physical_num(i); |
| 955 | if (!tmp_slot) |
| 956 | return -ENODEV; |
| 957 | if ((SLOT_PWRGD(tmp_slot->status)) && |
| 958 | !(SLOT_CONNECT(tmp_slot->status))) |
| 959 | count++; |
| 960 | } |
| 961 | get_cur_bus_info(&slot_cur); |
| 962 | switch (slot_cur->bus_on->current_speed) { |
| 963 | case BUS_SPEED_33: |
| 964 | limitation = slot_cur->bus_on->slots_at_33_conv; |
| 965 | break; |
| 966 | case BUS_SPEED_66: |
| 967 | if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX) |
| 968 | limitation = slot_cur->bus_on->slots_at_66_pcix; |
| 969 | else |
| 970 | limitation = slot_cur->bus_on->slots_at_66_conv; |
| 971 | break; |
| 972 | case BUS_SPEED_100: |
| 973 | limitation = slot_cur->bus_on->slots_at_100_pcix; |
| 974 | break; |
| 975 | case BUS_SPEED_133: |
| 976 | limitation = slot_cur->bus_on->slots_at_133_pcix; |
| 977 | break; |
| 978 | } |
| 979 | |
| 980 | if ((count + 1) > limitation) |
| 981 | return -EINVAL; |
| 982 | return 0; |
| 983 | } |
| 984 | |
| 985 | static inline void print_card_capability(struct slot *slot_cur) |
| 986 | { |
| 987 | info("capability of the card is "); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 988 | if ((slot_cur->ext_status & CARD_INFO) == PCIX133) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | info(" 133 MHz PCI-X\n"); |
| 990 | else if ((slot_cur->ext_status & CARD_INFO) == PCIX66) |
| 991 | info(" 66 MHz PCI-X\n"); |
| 992 | else if ((slot_cur->ext_status & CARD_INFO) == PCI66) |
| 993 | info(" 66 MHz PCI\n"); |
| 994 | else |
| 995 | info(" 33 MHz PCI\n"); |
| 996 | |
| 997 | } |
| 998 | |
| 999 | /* This routine will power on the slot, configure the device(s) and find the |
| 1000 | * drivers for them. |
| 1001 | * Parameters: hotplug_slot |
| 1002 | * Returns: 0 or failure codes |
| 1003 | */ |
| 1004 | static int enable_slot(struct hotplug_slot *hs) |
| 1005 | { |
| 1006 | int rc, i, rcpr; |
| 1007 | struct slot *slot_cur; |
| 1008 | u8 function; |
| 1009 | struct pci_func *tmp_func; |
| 1010 | |
| 1011 | ibmphp_lock_operations(); |
| 1012 | |
| 1013 | debug("ENABLING SLOT........\n"); |
| 1014 | slot_cur = hs->private; |
| 1015 | |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1016 | rc = validate(slot_cur, ENABLE); |
| 1017 | if (rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | err("validate function failed\n"); |
| 1019 | goto error_nopower; |
| 1020 | } |
| 1021 | |
| 1022 | attn_LED_blink(slot_cur); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | rc = set_bus(slot_cur); |
| 1025 | if (rc) { |
| 1026 | err("was not able to set the bus\n"); |
| 1027 | goto error_nopower; |
| 1028 | } |
| 1029 | |
| 1030 | /*-----------------debugging------------------------------*/ |
| 1031 | get_cur_bus_info(&slot_cur); |
| 1032 | debug("the current bus speed right after set_bus = %x\n", |
| 1033 | slot_cur->bus_on->current_speed); |
| 1034 | /*----------------------------------------------------------*/ |
| 1035 | |
| 1036 | rc = check_limitations(slot_cur); |
| 1037 | if (rc) { |
| 1038 | err("Adding this card exceeds the limitations of this bus.\n"); |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1039 | err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | err("Try hot-adding into another bus\n"); |
| 1041 | rc = -EINVAL; |
| 1042 | goto error_nopower; |
| 1043 | } |
| 1044 | |
| 1045 | rc = power_on(slot_cur); |
| 1046 | |
| 1047 | if (rc) { |
| 1048 | err("something wrong when powering up... please see below for details\n"); |
| 1049 | /* need to turn off before on, otherwise, blinking overwrites */ |
| 1050 | attn_off(slot_cur); |
| 1051 | attn_on(slot_cur); |
| 1052 | if (slot_update(&slot_cur)) { |
| 1053 | attn_off(slot_cur); |
| 1054 | attn_on(slot_cur); |
| 1055 | rc = -ENODEV; |
| 1056 | goto exit; |
| 1057 | } |
| 1058 | /* Check to see the error of why it failed */ |
| 1059 | if ((SLOT_POWER(slot_cur->status)) && |
| 1060 | !(SLOT_PWRGD(slot_cur->status))) |
| 1061 | err("power fault occurred trying to power up\n"); |
| 1062 | else if (SLOT_BUS_SPEED(slot_cur->status)) { |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1063 | err("bus speed mismatch occurred. please check current bus speed and card capability\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | print_card_capability(slot_cur); |
| 1065 | } else if (SLOT_BUS_MODE(slot_cur->ext_status)) { |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1066 | err("bus mode mismatch occurred. please check current bus mode and card capability\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | print_card_capability(slot_cur); |
| 1068 | } |
| 1069 | ibmphp_update_slot_info(slot_cur); |
| 1070 | goto exit; |
| 1071 | } |
| 1072 | debug("after power_on\n"); |
| 1073 | /*-----------------------debugging---------------------------*/ |
| 1074 | get_cur_bus_info(&slot_cur); |
| 1075 | debug("the current bus speed right after power_on = %x\n", |
| 1076 | slot_cur->bus_on->current_speed); |
| 1077 | /*----------------------------------------------------------*/ |
| 1078 | |
| 1079 | rc = slot_update(&slot_cur); |
| 1080 | if (rc) |
| 1081 | goto error_power; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | rc = -EINVAL; |
| 1084 | if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) { |
| 1085 | err("power fault occurred trying to power up...\n"); |
| 1086 | goto error_power; |
| 1087 | } |
| 1088 | if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) { |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 1089 | err("bus speed mismatch occurred. please check current bus speed and card capability\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | print_card_capability(slot_cur); |
| 1091 | goto error_power; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1092 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | /* Don't think this case will happen after above checks... |
| 1094 | * but just in case, for paranoia sake */ |
| 1095 | if (!(SLOT_POWER(slot_cur->status))) { |
| 1096 | err("power on failed...\n"); |
| 1097 | goto error_power; |
| 1098 | } |
| 1099 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 1100 | slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | if (!slot_cur->func) { |
| 1102 | /* We cannot do update_slot_info here, since no memory for |
| 1103 | * kmalloc n.e.ways, and update_slot_info allocates some */ |
| 1104 | err("out of system memory\n"); |
| 1105 | rc = -ENOMEM; |
| 1106 | goto error_power; |
| 1107 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | slot_cur->func->busno = slot_cur->bus; |
| 1109 | slot_cur->func->device = slot_cur->device; |
| 1110 | for (i = 0; i < 4; i++) |
| 1111 | slot_cur->func->irq[i] = slot_cur->irq[i]; |
| 1112 | |
| 1113 | debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n", |
| 1114 | slot_cur->bus, slot_cur->device); |
| 1115 | |
| 1116 | if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) { |
| 1117 | err("configure_card was unsuccessful...\n"); |
| 1118 | /* true because don't need to actually deallocate resources, |
| 1119 | * just remove references */ |
| 1120 | ibmphp_unconfigure_card(&slot_cur, 1); |
| 1121 | debug("after unconfigure_card\n"); |
| 1122 | slot_cur->func = NULL; |
| 1123 | rc = -ENOMEM; |
| 1124 | goto error_power; |
| 1125 | } |
| 1126 | |
| 1127 | function = 0x00; |
| 1128 | do { |
| 1129 | tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device, |
| 1130 | function++); |
| 1131 | if (tmp_func && !(tmp_func->dev)) |
| 1132 | ibm_configure_device(tmp_func); |
| 1133 | } while (tmp_func); |
| 1134 | |
| 1135 | attn_off(slot_cur); |
| 1136 | if (slot_update(&slot_cur)) { |
| 1137 | rc = -EFAULT; |
| 1138 | goto exit; |
| 1139 | } |
| 1140 | ibmphp_print_test(); |
| 1141 | rc = ibmphp_update_slot_info(slot_cur); |
| 1142 | exit: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1143 | ibmphp_unlock_operations(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | return rc; |
| 1145 | |
| 1146 | error_nopower: |
| 1147 | attn_off(slot_cur); /* need to turn off if was blinking b4 */ |
| 1148 | attn_on(slot_cur); |
| 1149 | error_cont: |
| 1150 | rcpr = slot_update(&slot_cur); |
| 1151 | if (rcpr) { |
| 1152 | rc = rcpr; |
| 1153 | goto exit; |
| 1154 | } |
| 1155 | ibmphp_update_slot_info(slot_cur); |
| 1156 | goto exit; |
| 1157 | |
| 1158 | error_power: |
| 1159 | attn_off(slot_cur); /* need to turn off if was blinking b4 */ |
| 1160 | attn_on(slot_cur); |
| 1161 | rcpr = power_off(slot_cur); |
| 1162 | if (rcpr) { |
| 1163 | rc = rcpr; |
| 1164 | goto exit; |
| 1165 | } |
| 1166 | goto error_cont; |
| 1167 | } |
| 1168 | |
| 1169 | /************************************************************** |
| 1170 | * HOT REMOVING ADAPTER CARD * |
| 1171 | * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE * |
| 1172 | * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE * |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 1173 | * DISABLE POWER , * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | **************************************************************/ |
| 1175 | static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot) |
| 1176 | { |
| 1177 | struct slot *slot = hotplug_slot->private; |
| 1178 | int rc; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | ibmphp_lock_operations(); |
| 1181 | rc = ibmphp_do_disable_slot(slot); |
| 1182 | ibmphp_unlock_operations(); |
| 1183 | return rc; |
| 1184 | } |
| 1185 | |
| 1186 | int ibmphp_do_disable_slot(struct slot *slot_cur) |
| 1187 | { |
| 1188 | int rc; |
| 1189 | u8 flag; |
| 1190 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1191 | debug("DISABLING SLOT...\n"); |
| 1192 | |
Quentin Lambert | 656f978 | 2014-09-07 20:02:47 +0200 | [diff] [blame] | 1193 | if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | return -ENODEV; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | flag = slot_cur->flag; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1197 | slot_cur->flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1199 | if (flag == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | rc = validate(slot_cur, DISABLE); |
| 1201 | /* checking if powered off already & valid slot # */ |
| 1202 | if (rc) |
| 1203 | goto error; |
| 1204 | } |
| 1205 | attn_LED_blink(slot_cur); |
| 1206 | |
| 1207 | if (slot_cur->func == NULL) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1208 | /* We need this for functions that were there on bootup */ |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 1209 | slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | if (!slot_cur->func) { |
| 1211 | err("out of system memory\n"); |
| 1212 | rc = -ENOMEM; |
| 1213 | goto error; |
| 1214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | slot_cur->func->busno = slot_cur->bus; |
| 1216 | slot_cur->func->device = slot_cur->device; |
| 1217 | } |
| 1218 | |
| 1219 | ibm_unconfigure_device(slot_cur->func); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1220 | |
| 1221 | /* |
| 1222 | * If we got here from latch suddenly opening on operating card or |
| 1223 | * a power fault, there's no power to the card, so cannot |
| 1224 | * read from it to determine what resources it occupied. This operation |
| 1225 | * is forbidden anyhow. The best we can do is remove it from kernel |
| 1226 | * lists at least */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | |
| 1228 | if (!flag) { |
| 1229 | attn_off(slot_cur); |
| 1230 | return 0; |
| 1231 | } |
| 1232 | |
| 1233 | rc = ibmphp_unconfigure_card(&slot_cur, 0); |
| 1234 | slot_cur->func = NULL; |
| 1235 | debug("in disable_slot. after unconfigure_card\n"); |
| 1236 | if (rc) { |
| 1237 | err("could not unconfigure card.\n"); |
| 1238 | goto error; |
| 1239 | } |
| 1240 | |
| 1241 | rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF); |
| 1242 | if (rc) |
| 1243 | goto error; |
| 1244 | |
| 1245 | attn_off(slot_cur); |
| 1246 | rc = slot_update(&slot_cur); |
| 1247 | if (rc) |
| 1248 | goto exit; |
| 1249 | |
| 1250 | rc = ibmphp_update_slot_info(slot_cur); |
| 1251 | ibmphp_print_test(); |
| 1252 | exit: |
| 1253 | return rc; |
| 1254 | |
| 1255 | error: |
| 1256 | /* Need to turn off if was blinking b4 */ |
| 1257 | attn_off(slot_cur); |
| 1258 | attn_on(slot_cur); |
| 1259 | if (slot_update(&slot_cur)) { |
| 1260 | rc = -EFAULT; |
| 1261 | goto exit; |
| 1262 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1263 | if (flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | ibmphp_update_slot_info(slot_cur); |
| 1265 | goto exit; |
| 1266 | } |
| 1267 | |
| 1268 | struct hotplug_slot_ops ibmphp_hotplug_slot_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | .set_attention_status = set_attention_status, |
| 1270 | .enable_slot = enable_slot, |
| 1271 | .disable_slot = ibmphp_disable_slot, |
| 1272 | .hardware_test = NULL, |
| 1273 | .get_power_status = get_power_status, |
| 1274 | .get_attention_status = get_attention_status, |
| 1275 | .get_latch_status = get_latch_status, |
| 1276 | .get_adapter_status = get_adapter_present, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | /* .get_max_adapter_speed = get_max_adapter_speed, |
| 1278 | .get_bus_name_status = get_bus_name, |
| 1279 | */ |
| 1280 | }; |
| 1281 | |
| 1282 | static void ibmphp_unload(void) |
| 1283 | { |
| 1284 | free_slots(); |
| 1285 | debug("after slots\n"); |
| 1286 | ibmphp_free_resources(); |
| 1287 | debug("after resources\n"); |
| 1288 | ibmphp_free_bus_info_queue(); |
| 1289 | debug("after bus info\n"); |
| 1290 | ibmphp_free_ebda_hpc_queue(); |
| 1291 | debug("after ebda hpc\n"); |
| 1292 | ibmphp_free_ebda_pci_rsrc_queue(); |
| 1293 | debug("after ebda pci rsrc\n"); |
| 1294 | kfree(ibmphp_pci_bus); |
| 1295 | } |
| 1296 | |
| 1297 | static int __init ibmphp_init(void) |
| 1298 | { |
| 1299 | struct pci_bus *bus; |
| 1300 | int i = 0; |
| 1301 | int rc = 0; |
| 1302 | |
| 1303 | init_flag = 1; |
| 1304 | |
| 1305 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
| 1306 | |
| 1307 | ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL); |
| 1308 | if (!ibmphp_pci_bus) { |
| 1309 | err("out of memory\n"); |
| 1310 | rc = -ENOMEM; |
| 1311 | goto exit; |
| 1312 | } |
| 1313 | |
| 1314 | bus = pci_find_bus(0, 0); |
| 1315 | if (!bus) { |
| 1316 | err("Can't find the root pci bus, can not continue\n"); |
| 1317 | rc = -ENODEV; |
| 1318 | goto error; |
| 1319 | } |
| 1320 | memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus)); |
| 1321 | |
| 1322 | ibmphp_debug = debug; |
| 1323 | |
| 1324 | ibmphp_hpc_initvars(); |
| 1325 | |
| 1326 | for (i = 0; i < 16; i++) |
| 1327 | irqs[i] = 0; |
| 1328 | |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1329 | rc = ibmphp_access_ebda(); |
| 1330 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | goto error; |
| 1332 | debug("after ibmphp_access_ebda()\n"); |
| 1333 | |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1334 | rc = ibmphp_rsrc_init(); |
| 1335 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | goto error; |
| 1337 | debug("AFTER Resource & EBDA INITIALIZATIONS\n"); |
| 1338 | |
| 1339 | max_slots = get_max_slots(); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1340 | |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1341 | rc = ibmphp_register_pci(); |
| 1342 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | goto error; |
| 1344 | |
| 1345 | if (init_ops()) { |
| 1346 | rc = -ENODEV; |
| 1347 | goto error; |
| 1348 | } |
| 1349 | |
| 1350 | ibmphp_print_test(); |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1351 | rc = ibmphp_hpc_start_poll_thread(); |
| 1352 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | exit: |
| 1356 | return rc; |
| 1357 | |
| 1358 | error: |
| 1359 | ibmphp_unload(); |
| 1360 | goto exit; |
| 1361 | } |
| 1362 | |
| 1363 | static void __exit ibmphp_exit(void) |
| 1364 | { |
| 1365 | ibmphp_hpc_stop_poll_thread(); |
| 1366 | debug("after polling\n"); |
| 1367 | ibmphp_unload(); |
| 1368 | debug("done\n"); |
| 1369 | } |
| 1370 | |
| 1371 | module_init(ibmphp_init); |
akpm@linux-foundation.org | 64f039d | 2009-04-15 14:24:08 -0700 | [diff] [blame] | 1372 | module_exit(ibmphp_exit); |