Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> |
Bjorn Helgaas | 39488b0 | 2008-12-08 21:31:42 -0700 | [diff] [blame] | 7 | * (c) Copyright 2008 Hewlett-Packard Development Company, L.P. |
| 8 | * Bjorn Helgaas <bjorn.helgaas@hp.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or (at |
| 15 | * your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, but |
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 26 | #include <linux/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/kernel.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/pm.h> |
| 33 | #include <linux/pci.h> |
| 34 | #include <linux/acpi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 35 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 37 | #define PREFIX "ACPI: " |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #define _COMPONENT ACPI_PCI_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 40 | ACPI_MODULE_NAME("pci_irq"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Bjorn Helgaas | f748baf | 2008-12-08 21:30:31 -0700 | [diff] [blame] | 42 | struct acpi_prt_entry { |
Bjorn Helgaas | f748baf | 2008-12-08 21:30:31 -0700 | [diff] [blame] | 43 | struct acpi_pci_id id; |
| 44 | u8 pin; |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 45 | acpi_handle link; |
| 46 | u32 index; /* GSI, or link _CRS index */ |
Bjorn Helgaas | f748baf | 2008-12-08 21:30:31 -0700 | [diff] [blame] | 47 | }; |
| 48 | |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 49 | static inline char pin_name(int pin) |
| 50 | { |
Bjorn Helgaas | e64e9db | 2008-12-08 21:30:41 -0700 | [diff] [blame] | 51 | return 'A' + pin - 1; |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 52 | } |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | /* -------------------------------------------------------------------------- |
| 55 | PCI IRQ Routing Table (PRT) Support |
| 56 | -------------------------------------------------------------------------- */ |
| 57 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 58 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 59 | static const struct dmi_system_id medion_md9580[] = { |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 60 | { |
| 61 | .ident = "Medion MD9580-F laptop", |
| 62 | .matches = { |
| 63 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), |
| 64 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), |
| 65 | }, |
| 66 | }, |
| 67 | { } |
| 68 | }; |
| 69 | |
| 70 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 71 | static const struct dmi_system_id dell_optiplex[] = { |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 72 | { |
| 73 | .ident = "Dell Optiplex GX1", |
| 74 | .matches = { |
| 75 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| 76 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), |
| 77 | }, |
| 78 | }, |
| 79 | { } |
| 80 | }; |
| 81 | |
| 82 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 83 | static const struct dmi_system_id hp_t5710[] = { |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 84 | { |
| 85 | .ident = "HP t5710", |
| 86 | .matches = { |
| 87 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 88 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), |
| 89 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), |
| 90 | }, |
| 91 | }, |
| 92 | { } |
| 93 | }; |
| 94 | |
| 95 | struct prt_quirk { |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 96 | const struct dmi_system_id *system; |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 97 | unsigned int segment; |
| 98 | unsigned int bus; |
| 99 | unsigned int device; |
| 100 | unsigned char pin; |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 101 | const char *source; /* according to BIOS */ |
| 102 | const char *actual_source; |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 103 | }; |
| 104 | |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 105 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
| 106 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 107 | /* |
| 108 | * These systems have incorrect _PRT entries. The BIOS claims the PCI |
| 109 | * interrupt at the listed segment/bus/device/pin is connected to the first |
| 110 | * link device, but it is actually connected to the second. |
| 111 | */ |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 112 | static const struct prt_quirk prt_quirks[] = { |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 113 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
Bjorn Helgaas | b97d480 | 2008-03-25 11:21:11 -0600 | [diff] [blame] | 114 | "\\_SB_.PCI0.ISA_.LNKA", |
| 115 | "\\_SB_.PCI0.ISA_.LNKB"}, |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 116 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 117 | "\\_SB_.LNKB", |
| 118 | "\\_SB_.LNKA"}, |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 119 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 120 | "\\_SB_.PCI0.LNK1", |
| 121 | "\\_SB_.PCI0.LNK3"}, |
| 122 | }; |
| 123 | |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame] | 124 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
| 125 | struct acpi_pci_routing_table *prt) |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 126 | { |
| 127 | int i; |
Jan Beulich | 609d4bc | 2009-03-12 11:58:25 +0000 | [diff] [blame] | 128 | const struct prt_quirk *quirk; |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 129 | |
| 130 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { |
| 131 | quirk = &prt_quirks[i]; |
| 132 | |
| 133 | /* All current quirks involve link devices, not GSIs */ |
| 134 | if (!prt->source) |
| 135 | continue; |
| 136 | |
| 137 | if (dmi_check_system(quirk->system) && |
| 138 | entry->id.segment == quirk->segment && |
| 139 | entry->id.bus == quirk->bus && |
| 140 | entry->id.device == quirk->device && |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 141 | entry->pin == quirk->pin && |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 142 | !strcmp(prt->source, quirk->source) && |
| 143 | strlen(prt->source) >= strlen(quirk->actual_source)) { |
| 144 | printk(KERN_WARNING PREFIX "firmware reports " |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 145 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 146 | "changing to %s\n", |
| 147 | entry->id.segment, entry->id.bus, |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 148 | entry->id.device, pin_name(entry->pin), |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 149 | prt->source, quirk->actual_source); |
| 150 | strcpy(prt->source, quirk->actual_source); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 155 | static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev, |
| 156 | int pin, struct acpi_pci_routing_table *prt, |
| 157 | struct acpi_prt_entry **entry_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 159 | int segment = pci_domain_nr(dev->bus); |
| 160 | int bus = dev->bus->number; |
Alex Williamson | 917bfd9 | 2015-05-26 15:11:51 -0600 | [diff] [blame] | 161 | int device = pci_ari_enabled(dev->bus) ? 0 : PCI_SLOT(dev->devfn); |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 162 | struct acpi_prt_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 164 | if (((prt->address >> 16) & 0xffff) != device || |
| 165 | prt->pin + 1 != pin) |
| 166 | return -ENODEV; |
| 167 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 168 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 170 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Bjorn Helgaas | e64e9db | 2008-12-08 21:30:41 -0700 | [diff] [blame] | 172 | /* |
| 173 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses |
| 174 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert |
| 175 | * it here. |
| 176 | */ |
Bjorn Helgaas | 79c4412 | 2012-10-30 15:24:06 +0900 | [diff] [blame] | 177 | entry->id.segment = segment; |
| 178 | entry->id.bus = bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
Bjorn Helgaas | e64e9db | 2008-12-08 21:30:41 -0700 | [diff] [blame] | 180 | entry->pin = prt->pin + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 182 | do_prt_fixups(entry, prt); |
| 183 | |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 184 | entry->index = prt->source_index; |
| 185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | /* |
| 187 | * Type 1: Dynamic |
| 188 | * --------------- |
| 189 | * The 'source' field specifies the PCI interrupt link device used to |
| 190 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' |
| 191 | * indicates which resource descriptor in the resource template (of |
| 192 | * the link device) this interrupt is allocated from. |
| 193 | * |
| 194 | * NOTE: Don't query the Link Device for IRQ information at this time |
| 195 | * because Link Device enumeration may not have occurred yet |
| 196 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI |
| 197 | * namespace). |
| 198 | */ |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 199 | if (prt->source[0]) |
| 200 | acpi_get_handle(handle, prt->source, &entry->link); |
| 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | /* |
| 203 | * Type 2: Static |
| 204 | * -------------- |
| 205 | * The 'source' field is NULL, and the 'source_index' field specifies |
| 206 | * the IRQ value, which is hardwired to specific interrupt inputs on |
| 207 | * the interrupt controller. |
| 208 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, |
Bjorn Helgaas | 21a5328 | 2008-12-08 21:30:05 -0700 | [diff] [blame] | 211 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 212 | entry->id.segment, entry->id.bus, |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 213 | entry->id.device, pin_name(entry->pin), |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 214 | prt->source, entry->index)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 216 | *entry_ptr = entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 218 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 221 | static int acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
| 222 | int pin, struct acpi_prt_entry **entry_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | { |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 224 | acpi_status status; |
| 225 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 226 | struct acpi_pci_routing_table *entry; |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 227 | acpi_handle handle = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 229 | if (dev->bus->bridge) |
| 230 | handle = ACPI_HANDLE(dev->bus->bridge); |
| 231 | |
| 232 | if (!handle) |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 233 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 235 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | status = acpi_get_irq_routing_table(handle, &buffer); |
| 237 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | kfree(buffer.pointer); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 239 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 242 | entry = buffer.pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | while (entry && (entry->length > 0)) { |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 244 | if (!acpi_pci_irq_check_entry(handle, dev, pin, |
| 245 | entry, entry_ptr)) |
| 246 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | entry = (struct acpi_pci_routing_table *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 248 | ((unsigned long)entry + entry->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 251 | kfree(buffer.pointer); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 252 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | /* -------------------------------------------------------------------------- |
| 256 | PCI Interrupt Routing Support |
| 257 | -------------------------------------------------------------------------- */ |
Stefan Assmann | d7f6169 | 2011-07-15 14:52:30 +0200 | [diff] [blame] | 258 | #ifdef CONFIG_X86_IO_APIC |
| 259 | extern int noioapicquirk; |
| 260 | extern int noioapicreroute; |
| 261 | |
| 262 | static int bridge_has_boot_interrupt_variant(struct pci_bus *bus) |
| 263 | { |
| 264 | struct pci_bus *bus_it; |
| 265 | |
| 266 | for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) { |
| 267 | if (!bus_it->self) |
| 268 | return 0; |
| 269 | if (bus_it->self->irq_reroute_variant) |
| 270 | return bus_it->self->irq_reroute_variant; |
| 271 | } |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ |
| 277 | * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does |
| 278 | * during interrupt handling). When this INTx generation cannot be disabled, |
| 279 | * we reroute these interrupts to their legacy equivalent to get rid of |
| 280 | * spurious interrupts. |
| 281 | */ |
| 282 | static int acpi_reroute_boot_interrupt(struct pci_dev *dev, |
| 283 | struct acpi_prt_entry *entry) |
| 284 | { |
| 285 | if (noioapicquirk || noioapicreroute) { |
| 286 | return 0; |
| 287 | } else { |
| 288 | switch (bridge_has_boot_interrupt_variant(dev->bus)) { |
| 289 | case 0: |
| 290 | /* no rerouting necessary */ |
| 291 | return 0; |
| 292 | case INTEL_IRQ_REROUTE_VARIANT: |
| 293 | /* |
| 294 | * Remap according to INTx routing table in 6700PXH |
| 295 | * specs, intel order number 302628-002, section |
| 296 | * 2.15.2. Other chipsets (80332, ...) have the same |
| 297 | * mapping and are handled here as well. |
| 298 | */ |
| 299 | dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy " |
| 300 | "IRQ %d\n", entry->index, |
| 301 | (entry->index % 4) + 16); |
| 302 | entry->index = (entry->index % 4) + 16; |
| 303 | return 1; |
| 304 | default: |
| 305 | dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy " |
| 306 | "IRQ: unknown mapping\n", entry->index); |
| 307 | return -1; |
| 308 | } |
| 309 | } |
| 310 | } |
| 311 | #endif /* CONFIG_X86_IO_APIC */ |
| 312 | |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame] | 313 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 315 | struct acpi_prt_entry *entry = NULL; |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 316 | struct pci_dev *bridge; |
| 317 | u8 bridge_pin, orig_pin = pin; |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 318 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 320 | ret = acpi_pci_irq_find_prt_entry(dev, pin, &entry); |
| 321 | if (!ret && entry) { |
Stefan Assmann | d7f6169 | 2011-07-15 14:52:30 +0200 | [diff] [blame] | 322 | #ifdef CONFIG_X86_IO_APIC |
| 323 | acpi_reroute_boot_interrupt(dev, entry); |
| 324 | #endif /* CONFIG_X86_IO_APIC */ |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 325 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", |
Bjorn Helgaas | 1350487 | 2008-12-08 21:30:56 -0700 | [diff] [blame] | 326 | pci_name(dev), pin_name(pin))); |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 327 | return entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 329 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 330 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | * Attempt to derive an IRQ for this device from a parent bridge's |
| 332 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). |
| 333 | */ |
Bjorn Helgaas | ee40136 | 2008-12-08 21:31:11 -0700 | [diff] [blame] | 334 | bridge = dev->bus->self; |
| 335 | while (bridge) { |
Bjorn Helgaas | c686d14 | 2009-02-17 13:49:10 -0700 | [diff] [blame] | 336 | pin = pci_swizzle_interrupt_pin(dev, pin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { |
| 339 | /* PC card has the same IRQ as its cardbridge */ |
Kristen Accardi | 8015a01 | 2005-11-02 16:24:35 -0800 | [diff] [blame] | 340 | bridge_pin = bridge->pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | if (!bridge_pin) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 342 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 343 | "No interrupt pin configured for device %s\n", |
| 344 | pci_name(bridge))); |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 345 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | pin = bridge_pin; |
| 348 | } |
| 349 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 350 | ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry); |
| 351 | if (!ret && entry) { |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 352 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 353 | "Derived GSI for %s INT %c from %s\n", |
| 354 | pci_name(dev), pin_name(orig_pin), |
| 355 | pci_name(bridge))); |
| 356 | return entry; |
| 357 | } |
Bjorn Helgaas | ee40136 | 2008-12-08 21:31:11 -0700 | [diff] [blame] | 358 | |
| 359 | dev = bridge; |
| 360 | bridge = dev->bus->self; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 363 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
| 364 | pin_name(orig_pin)); |
| 365 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Tomasz Nowicki | c1aaae6 | 2014-02-20 14:27:46 +0100 | [diff] [blame] | 368 | #if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA) |
| 369 | static int acpi_isa_register_gsi(struct pci_dev *dev) |
| 370 | { |
| 371 | u32 dev_gsi; |
| 372 | |
| 373 | /* Interrupt Line values above 0xF are forbidden */ |
| 374 | if (dev->irq > 0 && (dev->irq <= 0xF) && |
Jiang Liu | 5ebc760 | 2015-09-17 14:02:45 +0800 | [diff] [blame] | 375 | acpi_isa_irq_available(dev->irq) && |
Tomasz Nowicki | c1aaae6 | 2014-02-20 14:27:46 +0100 | [diff] [blame] | 376 | (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { |
| 377 | dev_warn(&dev->dev, "PCI INT %c: no GSI - using ISA IRQ %d\n", |
| 378 | pin_name(dev->pin), dev->irq); |
| 379 | acpi_register_gsi(&dev->dev, dev_gsi, |
| 380 | ACPI_LEVEL_SENSITIVE, |
| 381 | ACPI_ACTIVE_LOW); |
| 382 | return 0; |
| 383 | } |
| 384 | return -EINVAL; |
| 385 | } |
| 386 | #else |
| 387 | static inline int acpi_isa_register_gsi(struct pci_dev *dev) |
| 388 | { |
| 389 | return -ENODEV; |
| 390 | } |
| 391 | #endif |
| 392 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 393 | int acpi_pci_irq_enable(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 395 | struct acpi_prt_entry *entry; |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame] | 396 | int gsi; |
| 397 | u8 pin; |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 398 | int triggering = ACPI_LEVEL_SENSITIVE; |
| 399 | int polarity = ACPI_ACTIVE_LOW; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 400 | char *link = NULL; |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 401 | char link_desc[16]; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 402 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Kristen Accardi | 8015a01 | 2005-11-02 16:24:35 -0800 | [diff] [blame] | 404 | pin = dev->pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | if (!pin) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 406 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 407 | "No interrupt pin configured for device %s\n", |
| 408 | pci_name(dev))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 409 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Jiang Liu | 811a4e6 | 2015-06-10 16:55:00 +0800 | [diff] [blame] | 412 | if (pci_has_managed_irq(dev)) |
Jiang Liu | cffe0a2 | 2014-10-27 13:21:42 +0800 | [diff] [blame] | 413 | return 0; |
| 414 | |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 415 | entry = acpi_pci_irq_lookup(dev, pin); |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 416 | if (!entry) { |
Alan Cox | 96c2a87 | 2008-01-10 22:49:58 -0500 | [diff] [blame] | 417 | /* |
| 418 | * IDE legacy mode controller IRQs are magic. Why do compat |
| 419 | * extensions always make such a nasty mess. |
| 420 | */ |
| 421 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && |
| 422 | (dev->class & 0x05) == 0) |
| 423 | return 0; |
| 424 | } |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 425 | |
Bjorn Helgaas | 74f82af | 2008-12-08 21:31:32 -0700 | [diff] [blame] | 426 | if (entry) { |
| 427 | if (entry->link) |
| 428 | gsi = acpi_pci_link_allocate_irq(entry->link, |
| 429 | entry->index, |
| 430 | &triggering, &polarity, |
| 431 | &link); |
| 432 | else |
| 433 | gsi = entry->index; |
| 434 | } else |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 435 | gsi = -1; |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | /* |
| 438 | * No IRQ known to the ACPI subsystem - maybe the BIOS / |
| 439 | * driver reported one, then use it. Exit in any case. |
| 440 | */ |
Bjorn Helgaas | c13f889 | 2008-12-08 21:30:26 -0700 | [diff] [blame] | 441 | if (gsi < 0) { |
Tomasz Nowicki | c1aaae6 | 2014-02-20 14:27:46 +0100 | [diff] [blame] | 442 | if (acpi_isa_register_gsi(dev)) |
Joe Perches | 66fd383 | 2012-11-21 13:46:04 +0000 | [diff] [blame] | 443 | dev_warn(&dev->dev, "PCI INT %c: no GSI\n", |
| 444 | pin_name(pin)); |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 445 | |
Tomasz Nowicki | b685f3b | 2014-02-10 14:00:11 +0100 | [diff] [blame] | 446 | kfree(entry); |
Joe Perches | 66fd383 | 2012-11-21 13:46:04 +0000 | [diff] [blame] | 447 | return 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 448 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Yinghai Lu | a2f809b | 2009-04-27 18:01:20 -0700 | [diff] [blame] | 450 | rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity); |
Kenji Kaneshige | 349f0d5 | 2005-07-28 14:42:00 -0400 | [diff] [blame] | 451 | if (rc < 0) { |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 452 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 453 | pin_name(pin)); |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 454 | kfree(entry); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 455 | return rc; |
Kenji Kaneshige | 349f0d5 | 2005-07-28 14:42:00 -0400 | [diff] [blame] | 456 | } |
Jiang Liu | 811a4e6 | 2015-06-10 16:55:00 +0800 | [diff] [blame] | 457 | pci_set_managed_irq(dev, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | if (link) |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 460 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
| 461 | else |
| 462 | link_desc[0] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
Vincent Palatin | 85b8582 | 2011-12-05 11:51:18 -0800 | [diff] [blame] | 464 | dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
| 465 | pin_name(pin), link_desc, gsi, |
| 466 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
| 467 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 469 | kfree(entry); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 470 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 472 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 473 | void acpi_pci_irq_disable(struct pci_dev *dev) |
| 474 | { |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 475 | struct acpi_prt_entry *entry; |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame] | 476 | int gsi; |
| 477 | u8 pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
Kristen Accardi | 8015a01 | 2005-11-02 16:24:35 -0800 | [diff] [blame] | 479 | pin = dev->pin; |
Jiang Liu | 811a4e6 | 2015-06-10 16:55:00 +0800 | [diff] [blame] | 480 | if (!pin || !pci_has_managed_irq(dev)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 481 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 483 | entry = acpi_pci_irq_lookup(dev, pin); |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 484 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 485 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Bjorn Helgaas | 74f82af | 2008-12-08 21:31:32 -0700 | [diff] [blame] | 487 | if (entry->link) |
| 488 | gsi = acpi_pci_link_free_irq(entry->link); |
| 489 | else |
| 490 | gsi = entry->index; |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 491 | |
Yinghai Lu | 181380b | 2013-02-16 11:58:34 -0700 | [diff] [blame] | 492 | kfree(entry); |
| 493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | /* |
| 495 | * TBD: It might be worth clearing dev->irq by magic constant |
| 496 | * (e.g. PCI_UNDEFINED_IRQ). |
| 497 | */ |
| 498 | |
Vincent Palatin | 85b8582 | 2011-12-05 11:51:18 -0800 | [diff] [blame] | 499 | dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
Jiang Liu | cffe0a2 | 2014-10-27 13:21:42 +0800 | [diff] [blame] | 500 | if (gsi >= 0) { |
Jiang Liu | 6a38fa0 | 2014-06-10 14:16:27 +0800 | [diff] [blame] | 501 | acpi_unregister_gsi(gsi); |
Jiang Liu | 811a4e6 | 2015-06-10 16:55:00 +0800 | [diff] [blame] | 502 | pci_reset_managed_irq(dev); |
Jiang Liu | cffe0a2 | 2014-10-27 13:21:42 +0800 | [diff] [blame] | 503 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | } |